Merge remote-tracking branch 'upstream/pull/3297'

[rails.git] / vendor / assets / iD / iD.js

(function () {

        var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

        function createCommonjsModule(fn) {
          var module = { exports: {} };
                return fn(module, module.exports), module.exports;
        }

        var check = function (it) {
          return it && it.Math == Math && it;
        };

        // https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
        var global$2 =
          // eslint-disable-next-line es/no-global-this -- safe
          check(typeof globalThis == 'object' && globalThis) ||
          check(typeof window == 'object' && window) ||
          // eslint-disable-next-line no-restricted-globals -- safe
          check(typeof self == 'object' && self) ||
          check(typeof commonjsGlobal == 'object' && commonjsGlobal) ||
          // eslint-disable-next-line no-new-func -- fallback
          (function () { return this; })() || Function('return this')();

        var fails = function (exec) {
          try {
            return !!exec();
          } catch (error) {
            return true;
          }
        };

        // Detect IE8's incomplete defineProperty implementation
        var descriptors = !fails(function () {
          // eslint-disable-next-line es/no-object-defineproperty -- required for testing
          return Object.defineProperty({}, 1, { get: function () { return 7; } })[1] != 7;
        });

        var $propertyIsEnumerable$1 = {}.propertyIsEnumerable;
        // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
        var getOwnPropertyDescriptor$5 = Object.getOwnPropertyDescriptor;

        // Nashorn ~ JDK8 bug
        var NASHORN_BUG = getOwnPropertyDescriptor$5 && !$propertyIsEnumerable$1.call({ 1: 2 }, 1);

        // `Object.prototype.propertyIsEnumerable` method implementation
        // https://tc39.es/ecma262/#sec-object.prototype.propertyisenumerable
        var f$7 = NASHORN_BUG ? function propertyIsEnumerable(V) {
          var descriptor = getOwnPropertyDescriptor$5(this, V);
          return !!descriptor && descriptor.enumerable;
        } : $propertyIsEnumerable$1;

        var objectPropertyIsEnumerable = {
                f: f$7
        };

        var createPropertyDescriptor = function (bitmap, value) {
          return {
            enumerable: !(bitmap & 1),
            configurable: !(bitmap & 2),
            writable: !(bitmap & 4),
            value: value
          };
        };

        var toString$1 = {}.toString;

        var classofRaw = function (it) {
          return toString$1.call(it).slice(8, -1);
        };

        var split$1 = ''.split;

        // fallback for non-array-like ES3 and non-enumerable old V8 strings
        var indexedObject = fails(function () {
          // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346
          // eslint-disable-next-line no-prototype-builtins -- safe
          return !Object('z').propertyIsEnumerable(0);
        }) ? function (it) {
          return classofRaw(it) == 'String' ? split$1.call(it, '') : Object(it);
        } : Object;

        // `RequireObjectCoercible` abstract operation
        // https://tc39.es/ecma262/#sec-requireobjectcoercible
        var requireObjectCoercible = function (it) {
          if (it == undefined) throw TypeError("Can't call method on " + it);
          return it;
        };

        // toObject with fallback for non-array-like ES3 strings



        var toIndexedObject = function (it) {
          return indexedObject(requireObjectCoercible(it));
        };

        var isObject$4 = function (it) {
          return typeof it === 'object' ? it !== null : typeof it === 'function';
        };

        // `ToPrimitive` abstract operation
        // https://tc39.es/ecma262/#sec-toprimitive
        // instead of the ES6 spec version, we didn't implement @@toPrimitive case
        // and the second argument - flag - preferred type is a string
        var toPrimitive = function (input, PREFERRED_STRING) {
          if (!isObject$4(input)) return input;
          var fn, val;
          if (PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject$4(val = fn.call(input))) return val;
          if (typeof (fn = input.valueOf) == 'function' && !isObject$4(val = fn.call(input))) return val;
          if (!PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject$4(val = fn.call(input))) return val;
          throw TypeError("Can't convert object to primitive value");
        };

        // `ToObject` abstract operation
        // https://tc39.es/ecma262/#sec-toobject
        var toObject = function (argument) {
          return Object(requireObjectCoercible(argument));
        };

        var hasOwnProperty$3 = {}.hasOwnProperty;

        var has$1 = Object.hasOwn || function hasOwn(it, key) {
          return hasOwnProperty$3.call(toObject(it), key);
        };

        var document$3 = global$2.document;
        // typeof document.createElement is 'object' in old IE
        var EXISTS = isObject$4(document$3) && isObject$4(document$3.createElement);

        var documentCreateElement = function (it) {
          return EXISTS ? document$3.createElement(it) : {};
        };

        // Thank's IE8 for his funny defineProperty
        var ie8DomDefine = !descriptors && !fails(function () {
          // eslint-disable-next-line es/no-object-defineproperty -- requied for testing
          return Object.defineProperty(documentCreateElement('div'), 'a', {
            get: function () { return 7; }
          }).a != 7;
        });

        // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
        var $getOwnPropertyDescriptor$1 = Object.getOwnPropertyDescriptor;

        // `Object.getOwnPropertyDescriptor` method
        // https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
        var f$6 = descriptors ? $getOwnPropertyDescriptor$1 : function getOwnPropertyDescriptor(O, P) {
          O = toIndexedObject(O);
          P = toPrimitive(P, true);
          if (ie8DomDefine) try {
            return $getOwnPropertyDescriptor$1(O, P);
          } catch (error) { /* empty */ }
          if (has$1(O, P)) return createPropertyDescriptor(!objectPropertyIsEnumerable.f.call(O, P), O[P]);
        };

        var objectGetOwnPropertyDescriptor = {
                f: f$6
        };

        var anObject = function (it) {
          if (!isObject$4(it)) {
            throw TypeError(String(it) + ' is not an object');
          } return it;
        };

        // eslint-disable-next-line es/no-object-defineproperty -- safe
        var $defineProperty$1 = Object.defineProperty;

        // `Object.defineProperty` method
        // https://tc39.es/ecma262/#sec-object.defineproperty
        var f$5 = descriptors ? $defineProperty$1 : function defineProperty(O, P, Attributes) {
          anObject(O);
          P = toPrimitive(P, true);
          anObject(Attributes);
          if (ie8DomDefine) try {
            return $defineProperty$1(O, P, Attributes);
          } catch (error) { /* empty */ }
          if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported');
          if ('value' in Attributes) O[P] = Attributes.value;
          return O;
        };

        var objectDefineProperty = {
                f: f$5
        };

        var createNonEnumerableProperty = descriptors ? function (object, key, value) {
          return objectDefineProperty.f(object, key, createPropertyDescriptor(1, value));
        } : function (object, key, value) {
          object[key] = value;
          return object;
        };

        var setGlobal = function (key, value) {
          try {
            createNonEnumerableProperty(global$2, key, value);
          } catch (error) {
            global$2[key] = value;
          } return value;
        };

        var SHARED = '__core-js_shared__';
        var store$1 = global$2[SHARED] || setGlobal(SHARED, {});

        var sharedStore = store$1;

        var functionToString = Function.toString;

        // this helper broken in `core-js@3.4.1-3.4.4`, so we can't use `shared` helper
        if (typeof sharedStore.inspectSource != 'function') {
          sharedStore.inspectSource = function (it) {
            return functionToString.call(it);
          };
        }

        var inspectSource = sharedStore.inspectSource;

        var WeakMap$1 = global$2.WeakMap;

        var nativeWeakMap = typeof WeakMap$1 === 'function' && /native code/.test(inspectSource(WeakMap$1));

        var isPure = false;

        var shared = createCommonjsModule(function (module) {
        (module.exports = function (key, value) {
          return sharedStore[key] || (sharedStore[key] = value !== undefined ? value : {});
        })('versions', []).push({
          version: '3.15.0',
          mode: 'global',
          copyright: '© 2021 Denis Pushkarev (zloirock.ru)'
        });
        });

        var id$1 = 0;
        var postfix = Math.random();

        var uid = function (key) {
          return 'Symbol(' + String(key === undefined ? '' : key) + ')_' + (++id$1 + postfix).toString(36);
        };

        var keys$3 = shared('keys');

        var sharedKey = function (key) {
          return keys$3[key] || (keys$3[key] = uid(key));
        };

        var hiddenKeys$1 = {};

        var OBJECT_ALREADY_INITIALIZED = 'Object already initialized';
        var WeakMap = global$2.WeakMap;
        var set$4, get$5, has;

        var enforce = function (it) {
          return has(it) ? get$5(it) : set$4(it, {});
        };

        var getterFor = function (TYPE) {
          return function (it) {
            var state;
            if (!isObject$4(it) || (state = get$5(it)).type !== TYPE) {
              throw TypeError('Incompatible receiver, ' + TYPE + ' required');
            } return state;
          };
        };

        if (nativeWeakMap || sharedStore.state) {
          var store = sharedStore.state || (sharedStore.state = new WeakMap());
          var wmget = store.get;
          var wmhas = store.has;
          var wmset = store.set;
          set$4 = function (it, metadata) {
            if (wmhas.call(store, it)) throw new TypeError(OBJECT_ALREADY_INITIALIZED);
            metadata.facade = it;
            wmset.call(store, it, metadata);
            return metadata;
          };
          get$5 = function (it) {
            return wmget.call(store, it) || {};
          };
          has = function (it) {
            return wmhas.call(store, it);
          };
        } else {
          var STATE = sharedKey('state');
          hiddenKeys$1[STATE] = true;
          set$4 = function (it, metadata) {
            if (has$1(it, STATE)) throw new TypeError(OBJECT_ALREADY_INITIALIZED);
            metadata.facade = it;
            createNonEnumerableProperty(it, STATE, metadata);
            return metadata;
          };
          get$5 = function (it) {
            return has$1(it, STATE) ? it[STATE] : {};
          };
          has = function (it) {
            return has$1(it, STATE);
          };
        }

        var internalState = {
          set: set$4,
          get: get$5,
          has: has,
          enforce: enforce,
          getterFor: getterFor
        };

        var redefine = createCommonjsModule(function (module) {
        var getInternalState = internalState.get;
        var enforceInternalState = internalState.enforce;
        var TEMPLATE = String(String).split('String');

        (module.exports = function (O, key, value, options) {
          var unsafe = options ? !!options.unsafe : false;
          var simple = options ? !!options.enumerable : false;
          var noTargetGet = options ? !!options.noTargetGet : false;
          var state;
          if (typeof value == 'function') {
            if (typeof key == 'string' && !has$1(value, 'name')) {
              createNonEnumerableProperty(value, 'name', key);
            }
            state = enforceInternalState(value);
            if (!state.source) {
              state.source = TEMPLATE.join(typeof key == 'string' ? key : '');
            }
          }
          if (O === global$2) {
            if (simple) O[key] = value;
            else setGlobal(key, value);
            return;
          } else if (!unsafe) {
            delete O[key];
          } else if (!noTargetGet && O[key]) {
            simple = true;
          }
          if (simple) O[key] = value;
          else createNonEnumerableProperty(O, key, value);
        // add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative
        })(Function.prototype, 'toString', function toString() {
          return typeof this == 'function' && getInternalState(this).source || inspectSource(this);
        });
        });

        var path = global$2;

        var aFunction$1 = function (variable) {
          return typeof variable == 'function' ? variable : undefined;
        };

        var getBuiltIn = function (namespace, method) {
          return arguments.length < 2 ? aFunction$1(path[namespace]) || aFunction$1(global$2[namespace])
            : path[namespace] && path[namespace][method] || global$2[namespace] && global$2[namespace][method];
        };

        var ceil$1 = Math.ceil;
        var floor$7 = Math.floor;

        // `ToInteger` abstract operation
        // https://tc39.es/ecma262/#sec-tointeger
        var toInteger = function (argument) {
          return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor$7 : ceil$1)(argument);
        };

        var min$9 = Math.min;

        // `ToLength` abstract operation
        // https://tc39.es/ecma262/#sec-tolength
        var toLength = function (argument) {
          return argument > 0 ? min$9(toInteger(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991
        };

        var max$4 = Math.max;
        var min$8 = Math.min;

        // Helper for a popular repeating case of the spec:
        // Let integer be ? ToInteger(index).
        // If integer < 0, let result be max((length + integer), 0); else let result be min(integer, length).
        var toAbsoluteIndex = function (index, length) {
          var integer = toInteger(index);
          return integer < 0 ? max$4(integer + length, 0) : min$8(integer, length);
        };

        // `Array.prototype.{ indexOf, includes }` methods implementation
        var createMethod$6 = function (IS_INCLUDES) {
          return function ($this, el, fromIndex) {
            var O = toIndexedObject($this);
            var length = toLength(O.length);
            var index = toAbsoluteIndex(fromIndex, length);
            var value;
            // Array#includes uses SameValueZero equality algorithm
            // eslint-disable-next-line no-self-compare -- NaN check
            if (IS_INCLUDES && el != el) while (length > index) {
              value = O[index++];
              // eslint-disable-next-line no-self-compare -- NaN check
              if (value != value) return true;
            // Array#indexOf ignores holes, Array#includes - not
            } else for (;length > index; index++) {
              if ((IS_INCLUDES || index in O) && O[index] === el) return IS_INCLUDES || index || 0;
            } return !IS_INCLUDES && -1;
          };
        };

        var arrayIncludes = {
          // `Array.prototype.includes` method
          // https://tc39.es/ecma262/#sec-array.prototype.includes
          includes: createMethod$6(true),
          // `Array.prototype.indexOf` method
          // https://tc39.es/ecma262/#sec-array.prototype.indexof
          indexOf: createMethod$6(false)
        };

        var indexOf = arrayIncludes.indexOf;


        var objectKeysInternal = function (object, names) {
          var O = toIndexedObject(object);
          var i = 0;
          var result = [];
          var key;
          for (key in O) !has$1(hiddenKeys$1, key) && has$1(O, key) && result.push(key);
          // Don't enum bug & hidden keys
          while (names.length > i) if (has$1(O, key = names[i++])) {
            ~indexOf(result, key) || result.push(key);
          }
          return result;
        };

        // IE8- don't enum bug keys
        var enumBugKeys = [
          'constructor',
          'hasOwnProperty',
          'isPrototypeOf',
          'propertyIsEnumerable',
          'toLocaleString',
          'toString',
          'valueOf'
        ];

        var hiddenKeys = enumBugKeys.concat('length', 'prototype');

        // `Object.getOwnPropertyNames` method
        // https://tc39.es/ecma262/#sec-object.getownpropertynames
        // eslint-disable-next-line es/no-object-getownpropertynames -- safe
        var f$4 = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
          return objectKeysInternal(O, hiddenKeys);
        };

        var objectGetOwnPropertyNames = {
                f: f$4
        };

        // eslint-disable-next-line es/no-object-getownpropertysymbols -- safe
        var f$3 = Object.getOwnPropertySymbols;

        var objectGetOwnPropertySymbols = {
                f: f$3
        };

        // all object keys, includes non-enumerable and symbols
        var ownKeys = getBuiltIn('Reflect', 'ownKeys') || function ownKeys(it) {
          var keys = objectGetOwnPropertyNames.f(anObject(it));
          var getOwnPropertySymbols = objectGetOwnPropertySymbols.f;
          return getOwnPropertySymbols ? keys.concat(getOwnPropertySymbols(it)) : keys;
        };

        var copyConstructorProperties = function (target, source) {
          var keys = ownKeys(source);
          var defineProperty = objectDefineProperty.f;
          var getOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
          for (var i = 0; i < keys.length; i++) {
            var key = keys[i];
            if (!has$1(target, key)) defineProperty(target, key, getOwnPropertyDescriptor(source, key));
          }
        };

        var replacement = /#|\.prototype\./;

        var isForced = function (feature, detection) {
          var value = data[normalize$1(feature)];
          return value == POLYFILL ? true
            : value == NATIVE ? false
            : typeof detection == 'function' ? fails(detection)
            : !!detection;
        };

        var normalize$1 = isForced.normalize = function (string) {
          return String(string).replace(replacement, '.').toLowerCase();
        };

        var data = isForced.data = {};
        var NATIVE = isForced.NATIVE = 'N';
        var POLYFILL = isForced.POLYFILL = 'P';

        var isForced_1 = isForced;

        var getOwnPropertyDescriptor$4 = objectGetOwnPropertyDescriptor.f;






        /*
          options.target      - name of the target object
          options.global      - target is the global object
          options.stat        - export as static methods of target
          options.proto       - export as prototype methods of target
          options.real        - real prototype method for the `pure` version
          options.forced      - export even if the native feature is available
          options.bind        - bind methods to the target, required for the `pure` version
          options.wrap        - wrap constructors to preventing global pollution, required for the `pure` version
          options.unsafe      - use the simple assignment of property instead of delete + defineProperty
          options.sham        - add a flag to not completely full polyfills
          options.enumerable  - export as enumerable property
          options.noTargetGet - prevent calling a getter on target
        */
        var _export = function (options, source) {
          var TARGET = options.target;
          var GLOBAL = options.global;
          var STATIC = options.stat;
          var FORCED, target, key, targetProperty, sourceProperty, descriptor;
          if (GLOBAL) {
            target = global$2;
          } else if (STATIC) {
            target = global$2[TARGET] || setGlobal(TARGET, {});
          } else {
            target = (global$2[TARGET] || {}).prototype;
          }
          if (target) for (key in source) {
            sourceProperty = source[key];
            if (options.noTargetGet) {
              descriptor = getOwnPropertyDescriptor$4(target, key);
              targetProperty = descriptor && descriptor.value;
            } else targetProperty = target[key];
            FORCED = isForced_1(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);
            // contained in target
            if (!FORCED && targetProperty !== undefined) {
              if (typeof sourceProperty === typeof targetProperty) continue;
              copyConstructorProperties(sourceProperty, targetProperty);
            }
            // add a flag to not completely full polyfills
            if (options.sham || (targetProperty && targetProperty.sham)) {
              createNonEnumerableProperty(sourceProperty, 'sham', true);
            }
            // extend global
            redefine(target, key, sourceProperty, options);
          }
        };

        // `Date.now` method
        // https://tc39.es/ecma262/#sec-date.now
        _export({ target: 'Date', stat: true }, {
          now: function now() {
            return new Date().getTime();
          }
        });

        var DatePrototype$1 = Date.prototype;
        var INVALID_DATE = 'Invalid Date';
        var TO_STRING$1 = 'toString';
        var nativeDateToString = DatePrototype$1[TO_STRING$1];
        var getTime$1 = DatePrototype$1.getTime;

        // `Date.prototype.toString` method
        // https://tc39.es/ecma262/#sec-date.prototype.tostring
        if (new Date(NaN) + '' != INVALID_DATE) {
          redefine(DatePrototype$1, TO_STRING$1, function toString() {
            var value = getTime$1.call(this);
            // eslint-disable-next-line no-self-compare -- NaN check
            return value === value ? nativeDateToString.call(this) : INVALID_DATE;
          });
        }

        function _typeof(obj) {
          "@babel/helpers - typeof";

          if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
            _typeof = function (obj) {
              return typeof obj;
            };
          } else {
            _typeof = function (obj) {
              return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
            };
          }

          return _typeof(obj);
        }

        function _classCallCheck$1(instance, Constructor) {
          if (!(instance instanceof Constructor)) {
            throw new TypeError("Cannot call a class as a function");
          }
        }

        function _defineProperties$1(target, props) {
          for (var i = 0; i < props.length; i++) {
            var descriptor = props[i];
            descriptor.enumerable = descriptor.enumerable || false;
            descriptor.configurable = true;
            if ("value" in descriptor) descriptor.writable = true;
            Object.defineProperty(target, descriptor.key, descriptor);
          }
        }

        function _createClass$1(Constructor, protoProps, staticProps) {
          if (protoProps) _defineProperties$1(Constructor.prototype, protoProps);
          if (staticProps) _defineProperties$1(Constructor, staticProps);
          return Constructor;
        }

        function _defineProperty(obj, key, value) {
          if (key in obj) {
            Object.defineProperty(obj, key, {
              value: value,
              enumerable: true,
              configurable: true,
              writable: true
            });
          } else {
            obj[key] = value;
          }

          return obj;
        }

        function _slicedToArray(arr, i) {
          return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
        }

        function _toConsumableArray(arr) {
          return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();
        }

        function _arrayWithoutHoles(arr) {
          if (Array.isArray(arr)) return _arrayLikeToArray(arr);
        }

        function _arrayWithHoles(arr) {
          if (Array.isArray(arr)) return arr;
        }

        function _iterableToArray(iter) {
          if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter);
        }

        function _iterableToArrayLimit(arr, i) {
          var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"];

          if (_i == null) return;
          var _arr = [];
          var _n = true;
          var _d = false;

          var _s, _e;

          try {
            for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) {
              _arr.push(_s.value);

              if (i && _arr.length === i) break;
            }
          } catch (err) {
            _d = true;
            _e = err;
          } finally {
            try {
              if (!_n && _i["return"] != null) _i["return"]();
            } finally {
              if (_d) throw _e;
            }
          }

          return _arr;
        }

        function _unsupportedIterableToArray(o, minLen) {
          if (!o) return;
          if (typeof o === "string") return _arrayLikeToArray(o, minLen);
          var n = Object.prototype.toString.call(o).slice(8, -1);
          if (n === "Object" && o.constructor) n = o.constructor.name;
          if (n === "Map" || n === "Set") return Array.from(o);
          if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
        }

        function _arrayLikeToArray(arr, len) {
          if (len == null || len > arr.length) len = arr.length;

          for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];

          return arr2;
        }

        function _nonIterableSpread() {
          throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
        }

        function _nonIterableRest() {
          throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
        }

        function _createForOfIteratorHelper(o, allowArrayLike) {
          var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];

          if (!it) {
            if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
              if (it) o = it;
              var i = 0;

              var F = function () {};

              return {
                s: F,
                n: function () {
                  if (i >= o.length) return {
                    done: true
                  };
                  return {
                    done: false,
                    value: o[i++]
                  };
                },
                e: function (e) {
                  throw e;
                },
                f: F
              };
            }

            throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
          }

          var normalCompletion = true,
              didErr = false,
              err;
          return {
            s: function () {
              it = it.call(o);
            },
            n: function () {
              var step = it.next();
              normalCompletion = step.done;
              return step;
            },
            e: function (e) {
              didErr = true;
              err = e;
            },
            f: function () {
              try {
                if (!normalCompletion && it.return != null) it.return();
              } finally {
                if (didErr) throw err;
              }
            }
          };
        }

        var engineUserAgent = getBuiltIn('navigator', 'userAgent') || '';

        var process$4 = global$2.process;
        var versions = process$4 && process$4.versions;
        var v8 = versions && versions.v8;
        var match, version$1;

        if (v8) {
          match = v8.split('.');
          version$1 = match[0] < 4 ? 1 : match[0] + match[1];
        } else if (engineUserAgent) {
          match = engineUserAgent.match(/Edge\/(\d+)/);
          if (!match || match[1] >= 74) {
            match = engineUserAgent.match(/Chrome\/(\d+)/);
            if (match) version$1 = match[1];
          }
        }

        var engineV8Version = version$1 && +version$1;

        /* eslint-disable es/no-symbol -- required for testing */

        // eslint-disable-next-line es/no-object-getownpropertysymbols -- required for testing
        var nativeSymbol = !!Object.getOwnPropertySymbols && !fails(function () {
          var symbol = Symbol();
          // Chrome 38 Symbol has incorrect toString conversion
          // `get-own-property-symbols` polyfill symbols converted to object are not Symbol instances
          return !String(symbol) || !(Object(symbol) instanceof Symbol) ||
            // Chrome 38-40 symbols are not inherited from DOM collections prototypes to instances
            !Symbol.sham && engineV8Version && engineV8Version < 41;
        });

        /* eslint-disable es/no-symbol -- required for testing */

        var useSymbolAsUid = nativeSymbol
          && !Symbol.sham
          && typeof Symbol.iterator == 'symbol';

        var WellKnownSymbolsStore$1 = shared('wks');
        var Symbol$1 = global$2.Symbol;
        var createWellKnownSymbol = useSymbolAsUid ? Symbol$1 : Symbol$1 && Symbol$1.withoutSetter || uid;

        var wellKnownSymbol = function (name) {
          if (!has$1(WellKnownSymbolsStore$1, name) || !(nativeSymbol || typeof WellKnownSymbolsStore$1[name] == 'string')) {
            if (nativeSymbol && has$1(Symbol$1, name)) {
              WellKnownSymbolsStore$1[name] = Symbol$1[name];
            } else {
              WellKnownSymbolsStore$1[name] = createWellKnownSymbol('Symbol.' + name);
            }
          } return WellKnownSymbolsStore$1[name];
        };

        var f$2 = wellKnownSymbol;

        var wellKnownSymbolWrapped = {
                f: f$2
        };

        var defineProperty$9 = objectDefineProperty.f;

        var defineWellKnownSymbol = function (NAME) {
          var Symbol = path.Symbol || (path.Symbol = {});
          if (!has$1(Symbol, NAME)) defineProperty$9(Symbol, NAME, {
            value: wellKnownSymbolWrapped.f(NAME)
          });
        };

        // `Symbol.iterator` well-known symbol
        // https://tc39.es/ecma262/#sec-symbol.iterator
        defineWellKnownSymbol('iterator');

        // `Object.keys` method
        // https://tc39.es/ecma262/#sec-object.keys
        // eslint-disable-next-line es/no-object-keys -- safe
        var objectKeys = Object.keys || function keys(O) {
          return objectKeysInternal(O, enumBugKeys);
        };

        // `Object.defineProperties` method
        // https://tc39.es/ecma262/#sec-object.defineproperties
        // eslint-disable-next-line es/no-object-defineproperties -- safe
        var objectDefineProperties = descriptors ? Object.defineProperties : function defineProperties(O, Properties) {
          anObject(O);
          var keys = objectKeys(Properties);
          var length = keys.length;
          var index = 0;
          var key;
          while (length > index) objectDefineProperty.f(O, key = keys[index++], Properties[key]);
          return O;
        };

        var html = getBuiltIn('document', 'documentElement');

        var GT = '>';
        var LT = '<';
        var PROTOTYPE$2 = 'prototype';
        var SCRIPT = 'script';
        var IE_PROTO$1 = sharedKey('IE_PROTO');

        var EmptyConstructor = function () { /* empty */ };

        var scriptTag = function (content) {
          return LT + SCRIPT + GT + content + LT + '/' + SCRIPT + GT;
        };

        // Create object with fake `null` prototype: use ActiveX Object with cleared prototype
        var NullProtoObjectViaActiveX = function (activeXDocument) {
          activeXDocument.write(scriptTag(''));
          activeXDocument.close();
          var temp = activeXDocument.parentWindow.Object;
          activeXDocument = null; // avoid memory leak
          return temp;
        };

        // Create object with fake `null` prototype: use iframe Object with cleared prototype
        var NullProtoObjectViaIFrame = function () {
          // Thrash, waste and sodomy: IE GC bug
          var iframe = documentCreateElement('iframe');
          var JS = 'java' + SCRIPT + ':';
          var iframeDocument;
          iframe.style.display = 'none';
          html.appendChild(iframe);
          // https://github.com/zloirock/core-js/issues/475
          iframe.src = String(JS);
          iframeDocument = iframe.contentWindow.document;
          iframeDocument.open();
          iframeDocument.write(scriptTag('document.F=Object'));
          iframeDocument.close();
          return iframeDocument.F;
        };

        // Check for document.domain and active x support
        // No need to use active x approach when document.domain is not set
        // see https://github.com/es-shims/es5-shim/issues/150
        // variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346
        // avoid IE GC bug
        var activeXDocument;
        var NullProtoObject = function () {
          try {
            /* global ActiveXObject -- old IE */
            activeXDocument = document.domain && new ActiveXObject('htmlfile');
          } catch (error) { /* ignore */ }
          NullProtoObject = activeXDocument ? NullProtoObjectViaActiveX(activeXDocument) : NullProtoObjectViaIFrame();
          var length = enumBugKeys.length;
          while (length--) delete NullProtoObject[PROTOTYPE$2][enumBugKeys[length]];
          return NullProtoObject();
        };

        hiddenKeys$1[IE_PROTO$1] = true;

        // `Object.create` method
        // https://tc39.es/ecma262/#sec-object.create
        var objectCreate = Object.create || function create(O, Properties) {
          var result;
          if (O !== null) {
            EmptyConstructor[PROTOTYPE$2] = anObject(O);
            result = new EmptyConstructor();
            EmptyConstructor[PROTOTYPE$2] = null;
            // add "__proto__" for Object.getPrototypeOf polyfill
            result[IE_PROTO$1] = O;
          } else result = NullProtoObject();
          return Properties === undefined ? result : objectDefineProperties(result, Properties);
        };

        var UNSCOPABLES = wellKnownSymbol('unscopables');
        var ArrayPrototype$1 = Array.prototype;

        // Array.prototype[@@unscopables]
        // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
        if (ArrayPrototype$1[UNSCOPABLES] == undefined) {
          objectDefineProperty.f(ArrayPrototype$1, UNSCOPABLES, {
            configurable: true,
            value: objectCreate(null)
          });
        }

        // add a key to Array.prototype[@@unscopables]
        var addToUnscopables = function (key) {
          ArrayPrototype$1[UNSCOPABLES][key] = true;
        };

        var iterators = {};

        var correctPrototypeGetter = !fails(function () {
          function F() { /* empty */ }
          F.prototype.constructor = null;
          // eslint-disable-next-line es/no-object-getprototypeof -- required for testing
          return Object.getPrototypeOf(new F()) !== F.prototype;
        });

        var IE_PROTO = sharedKey('IE_PROTO');
        var ObjectPrototype$3 = Object.prototype;

        // `Object.getPrototypeOf` method
        // https://tc39.es/ecma262/#sec-object.getprototypeof
        // eslint-disable-next-line es/no-object-getprototypeof -- safe
        var objectGetPrototypeOf = correctPrototypeGetter ? Object.getPrototypeOf : function (O) {
          O = toObject(O);
          if (has$1(O, IE_PROTO)) return O[IE_PROTO];
          if (typeof O.constructor == 'function' && O instanceof O.constructor) {
            return O.constructor.prototype;
          } return O instanceof Object ? ObjectPrototype$3 : null;
        };

        var ITERATOR$8 = wellKnownSymbol('iterator');
        var BUGGY_SAFARI_ITERATORS$1 = false;

        var returnThis$2 = function () { return this; };

        // `%IteratorPrototype%` object
        // https://tc39.es/ecma262/#sec-%iteratorprototype%-object
        var IteratorPrototype$2, PrototypeOfArrayIteratorPrototype, arrayIterator;

        /* eslint-disable es/no-array-prototype-keys -- safe */
        if ([].keys) {
          arrayIterator = [].keys();
          // Safari 8 has buggy iterators w/o `next`
          if (!('next' in arrayIterator)) BUGGY_SAFARI_ITERATORS$1 = true;
          else {
            PrototypeOfArrayIteratorPrototype = objectGetPrototypeOf(objectGetPrototypeOf(arrayIterator));
            if (PrototypeOfArrayIteratorPrototype !== Object.prototype) IteratorPrototype$2 = PrototypeOfArrayIteratorPrototype;
          }
        }

        var NEW_ITERATOR_PROTOTYPE = IteratorPrototype$2 == undefined || fails(function () {
          var test = {};
          // FF44- legacy iterators case
          return IteratorPrototype$2[ITERATOR$8].call(test) !== test;
        });

        if (NEW_ITERATOR_PROTOTYPE) IteratorPrototype$2 = {};

        // `%IteratorPrototype%[@@iterator]()` method
        // https://tc39.es/ecma262/#sec-%iteratorprototype%-@@iterator
        if (!has$1(IteratorPrototype$2, ITERATOR$8)) {
          createNonEnumerableProperty(IteratorPrototype$2, ITERATOR$8, returnThis$2);
        }

        var iteratorsCore = {
          IteratorPrototype: IteratorPrototype$2,
          BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS$1
        };

        var defineProperty$8 = objectDefineProperty.f;



        var TO_STRING_TAG$4 = wellKnownSymbol('toStringTag');

        var setToStringTag = function (it, TAG, STATIC) {
          if (it && !has$1(it = STATIC ? it : it.prototype, TO_STRING_TAG$4)) {
            defineProperty$8(it, TO_STRING_TAG$4, { configurable: true, value: TAG });
          }
        };

        var IteratorPrototype$1 = iteratorsCore.IteratorPrototype;





        var returnThis$1 = function () { return this; };

        var createIteratorConstructor = function (IteratorConstructor, NAME, next) {
          var TO_STRING_TAG = NAME + ' Iterator';
          IteratorConstructor.prototype = objectCreate(IteratorPrototype$1, { next: createPropertyDescriptor(1, next) });
          setToStringTag(IteratorConstructor, TO_STRING_TAG, false);
          iterators[TO_STRING_TAG] = returnThis$1;
          return IteratorConstructor;
        };

        var aPossiblePrototype = function (it) {
          if (!isObject$4(it) && it !== null) {
            throw TypeError("Can't set " + String(it) + ' as a prototype');
          } return it;
        };

        /* eslint-disable no-proto -- safe */

        // `Object.setPrototypeOf` method
        // https://tc39.es/ecma262/#sec-object.setprototypeof
        // Works with __proto__ only. Old v8 can't work with null proto objects.
        // eslint-disable-next-line es/no-object-setprototypeof -- safe
        var objectSetPrototypeOf = Object.setPrototypeOf || ('__proto__' in {} ? function () {
          var CORRECT_SETTER = false;
          var test = {};
          var setter;
          try {
            // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
            setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;
            setter.call(test, []);
            CORRECT_SETTER = test instanceof Array;
          } catch (error) { /* empty */ }
          return function setPrototypeOf(O, proto) {
            anObject(O);
            aPossiblePrototype(proto);
            if (CORRECT_SETTER) setter.call(O, proto);
            else O.__proto__ = proto;
            return O;
          };
        }() : undefined);

        var IteratorPrototype = iteratorsCore.IteratorPrototype;
        var BUGGY_SAFARI_ITERATORS = iteratorsCore.BUGGY_SAFARI_ITERATORS;
        var ITERATOR$7 = wellKnownSymbol('iterator');
        var KEYS = 'keys';
        var VALUES = 'values';
        var ENTRIES = 'entries';

        var returnThis = function () { return this; };

        var defineIterator = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {
          createIteratorConstructor(IteratorConstructor, NAME, next);

          var getIterationMethod = function (KIND) {
            if (KIND === DEFAULT && defaultIterator) return defaultIterator;
            if (!BUGGY_SAFARI_ITERATORS && KIND in IterablePrototype) return IterablePrototype[KIND];
            switch (KIND) {
              case KEYS: return function keys() { return new IteratorConstructor(this, KIND); };
              case VALUES: return function values() { return new IteratorConstructor(this, KIND); };
              case ENTRIES: return function entries() { return new IteratorConstructor(this, KIND); };
            } return function () { return new IteratorConstructor(this); };
          };

          var TO_STRING_TAG = NAME + ' Iterator';
          var INCORRECT_VALUES_NAME = false;
          var IterablePrototype = Iterable.prototype;
          var nativeIterator = IterablePrototype[ITERATOR$7]
            || IterablePrototype['@@iterator']
            || DEFAULT && IterablePrototype[DEFAULT];
          var defaultIterator = !BUGGY_SAFARI_ITERATORS && nativeIterator || getIterationMethod(DEFAULT);
          var anyNativeIterator = NAME == 'Array' ? IterablePrototype.entries || nativeIterator : nativeIterator;
          var CurrentIteratorPrototype, methods, KEY;

          // fix native
          if (anyNativeIterator) {
            CurrentIteratorPrototype = objectGetPrototypeOf(anyNativeIterator.call(new Iterable()));
            if (IteratorPrototype !== Object.prototype && CurrentIteratorPrototype.next) {
              if (objectGetPrototypeOf(CurrentIteratorPrototype) !== IteratorPrototype) {
                if (objectSetPrototypeOf) {
                  objectSetPrototypeOf(CurrentIteratorPrototype, IteratorPrototype);
                } else if (typeof CurrentIteratorPrototype[ITERATOR$7] != 'function') {
                  createNonEnumerableProperty(CurrentIteratorPrototype, ITERATOR$7, returnThis);
                }
              }
              // Set @@toStringTag to native iterators
              setToStringTag(CurrentIteratorPrototype, TO_STRING_TAG, true);
            }
          }

          // fix Array.prototype.{ values, @@iterator }.name in V8 / FF
          if (DEFAULT == VALUES && nativeIterator && nativeIterator.name !== VALUES) {
            INCORRECT_VALUES_NAME = true;
            defaultIterator = function values() { return nativeIterator.call(this); };
          }

          // define iterator
          if (IterablePrototype[ITERATOR$7] !== defaultIterator) {
            createNonEnumerableProperty(IterablePrototype, ITERATOR$7, defaultIterator);
          }
          iterators[NAME] = defaultIterator;

          // export additional methods
          if (DEFAULT) {
            methods = {
              values: getIterationMethod(VALUES),
              keys: IS_SET ? defaultIterator : getIterationMethod(KEYS),
              entries: getIterationMethod(ENTRIES)
            };
            if (FORCED) for (KEY in methods) {
              if (BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {
                redefine(IterablePrototype, KEY, methods[KEY]);
              }
            } else _export({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME }, methods);
          }

          return methods;
        };

        var ARRAY_ITERATOR = 'Array Iterator';
        var setInternalState$7 = internalState.set;
        var getInternalState$5 = internalState.getterFor(ARRAY_ITERATOR);

        // `Array.prototype.entries` method
        // https://tc39.es/ecma262/#sec-array.prototype.entries
        // `Array.prototype.keys` method
        // https://tc39.es/ecma262/#sec-array.prototype.keys
        // `Array.prototype.values` method
        // https://tc39.es/ecma262/#sec-array.prototype.values
        // `Array.prototype[@@iterator]` method
        // https://tc39.es/ecma262/#sec-array.prototype-@@iterator
        // `CreateArrayIterator` internal method
        // https://tc39.es/ecma262/#sec-createarrayiterator
        var es_array_iterator = defineIterator(Array, 'Array', function (iterated, kind) {
          setInternalState$7(this, {
            type: ARRAY_ITERATOR,
            target: toIndexedObject(iterated), // target
            index: 0,                          // next index
            kind: kind                         // kind
          });
        // `%ArrayIteratorPrototype%.next` method
        // https://tc39.es/ecma262/#sec-%arrayiteratorprototype%.next
        }, function () {
          var state = getInternalState$5(this);
          var target = state.target;
          var kind = state.kind;
          var index = state.index++;
          if (!target || index >= target.length) {
            state.target = undefined;
            return { value: undefined, done: true };
          }
          if (kind == 'keys') return { value: index, done: false };
          if (kind == 'values') return { value: target[index], done: false };
          return { value: [index, target[index]], done: false };
        }, 'values');

        // argumentsList[@@iterator] is %ArrayProto_values%
        // https://tc39.es/ecma262/#sec-createunmappedargumentsobject
        // https://tc39.es/ecma262/#sec-createmappedargumentsobject
        iterators.Arguments = iterators.Array;

        // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
        addToUnscopables('keys');
        addToUnscopables('values');
        addToUnscopables('entries');

        var TO_STRING_TAG$3 = wellKnownSymbol('toStringTag');
        var test$2 = {};

        test$2[TO_STRING_TAG$3] = 'z';

        var toStringTagSupport = String(test$2) === '[object z]';

        var TO_STRING_TAG$2 = wellKnownSymbol('toStringTag');
        // ES3 wrong here
        var CORRECT_ARGUMENTS = classofRaw(function () { return arguments; }()) == 'Arguments';

        // fallback for IE11 Script Access Denied error
        var tryGet = function (it, key) {
          try {
            return it[key];
          } catch (error) { /* empty */ }
        };

        // getting tag from ES6+ `Object.prototype.toString`
        var classof = toStringTagSupport ? classofRaw : function (it) {
          var O, tag, result;
          return it === undefined ? 'Undefined' : it === null ? 'Null'
            // @@toStringTag case
            : typeof (tag = tryGet(O = Object(it), TO_STRING_TAG$2)) == 'string' ? tag
            // builtinTag case
            : CORRECT_ARGUMENTS ? classofRaw(O)
            // ES3 arguments fallback
            : (result = classofRaw(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : result;
        };

        // `Object.prototype.toString` method implementation
        // https://tc39.es/ecma262/#sec-object.prototype.tostring
        var objectToString$1 = toStringTagSupport ? {}.toString : function toString() {
          return '[object ' + classof(this) + ']';
        };

        // `Object.prototype.toString` method
        // https://tc39.es/ecma262/#sec-object.prototype.tostring
        if (!toStringTagSupport) {
          redefine(Object.prototype, 'toString', objectToString$1, { unsafe: true });
        }

        // `String.prototype.{ codePointAt, at }` methods implementation
        var createMethod$5 = function (CONVERT_TO_STRING) {
          return function ($this, pos) {
            var S = String(requireObjectCoercible($this));
            var position = toInteger(pos);
            var size = S.length;
            var first, second;
            if (position < 0 || position >= size) return CONVERT_TO_STRING ? '' : undefined;
            first = S.charCodeAt(position);
            return first < 0xD800 || first > 0xDBFF || position + 1 === size
              || (second = S.charCodeAt(position + 1)) < 0xDC00 || second > 0xDFFF
                ? CONVERT_TO_STRING ? S.charAt(position) : first
                : CONVERT_TO_STRING ? S.slice(position, position + 2) : (first - 0xD800 << 10) + (second - 0xDC00) + 0x10000;
          };
        };

        var stringMultibyte = {
          // `String.prototype.codePointAt` method
          // https://tc39.es/ecma262/#sec-string.prototype.codepointat
          codeAt: createMethod$5(false),
          // `String.prototype.at` method
          // https://github.com/mathiasbynens/String.prototype.at
          charAt: createMethod$5(true)
        };

        var charAt$1 = stringMultibyte.charAt;



        var STRING_ITERATOR = 'String Iterator';
        var setInternalState$6 = internalState.set;
        var getInternalState$4 = internalState.getterFor(STRING_ITERATOR);

        // `String.prototype[@@iterator]` method
        // https://tc39.es/ecma262/#sec-string.prototype-@@iterator
        defineIterator(String, 'String', function (iterated) {
          setInternalState$6(this, {
            type: STRING_ITERATOR,
            string: String(iterated),
            index: 0
          });
        // `%StringIteratorPrototype%.next` method
        // https://tc39.es/ecma262/#sec-%stringiteratorprototype%.next
        }, function next() {
          var state = getInternalState$4(this);
          var string = state.string;
          var index = state.index;
          var point;
          if (index >= string.length) return { value: undefined, done: true };
          point = charAt$1(string, index);
          state.index += point.length;
          return { value: point, done: false };
        });

        // iterable DOM collections
        // flag - `iterable` interface - 'entries', 'keys', 'values', 'forEach' methods
        var domIterables = {
          CSSRuleList: 0,
          CSSStyleDeclaration: 0,
          CSSValueList: 0,
          ClientRectList: 0,
          DOMRectList: 0,
          DOMStringList: 0,
          DOMTokenList: 1,
          DataTransferItemList: 0,
          FileList: 0,
          HTMLAllCollection: 0,
          HTMLCollection: 0,
          HTMLFormElement: 0,
          HTMLSelectElement: 0,
          MediaList: 0,
          MimeTypeArray: 0,
          NamedNodeMap: 0,
          NodeList: 1,
          PaintRequestList: 0,
          Plugin: 0,
          PluginArray: 0,
          SVGLengthList: 0,
          SVGNumberList: 0,
          SVGPathSegList: 0,
          SVGPointList: 0,
          SVGStringList: 0,
          SVGTransformList: 0,
          SourceBufferList: 0,
          StyleSheetList: 0,
          TextTrackCueList: 0,
          TextTrackList: 0,
          TouchList: 0
        };

        var ITERATOR$6 = wellKnownSymbol('iterator');
        var TO_STRING_TAG$1 = wellKnownSymbol('toStringTag');
        var ArrayValues = es_array_iterator.values;

        for (var COLLECTION_NAME$1 in domIterables) {
          var Collection$1 = global$2[COLLECTION_NAME$1];
          var CollectionPrototype$1 = Collection$1 && Collection$1.prototype;
          if (CollectionPrototype$1) {
            // some Chrome versions have non-configurable methods on DOMTokenList
            if (CollectionPrototype$1[ITERATOR$6] !== ArrayValues) try {
              createNonEnumerableProperty(CollectionPrototype$1, ITERATOR$6, ArrayValues);
            } catch (error) {
              CollectionPrototype$1[ITERATOR$6] = ArrayValues;
            }
            if (!CollectionPrototype$1[TO_STRING_TAG$1]) {
              createNonEnumerableProperty(CollectionPrototype$1, TO_STRING_TAG$1, COLLECTION_NAME$1);
            }
            if (domIterables[COLLECTION_NAME$1]) for (var METHOD_NAME in es_array_iterator) {
              // some Chrome versions have non-configurable methods on DOMTokenList
              if (CollectionPrototype$1[METHOD_NAME] !== es_array_iterator[METHOD_NAME]) try {
                createNonEnumerableProperty(CollectionPrototype$1, METHOD_NAME, es_array_iterator[METHOD_NAME]);
              } catch (error) {
                CollectionPrototype$1[METHOD_NAME] = es_array_iterator[METHOD_NAME];
              }
            }
          }
        }

        // `IsArray` abstract operation
        // https://tc39.es/ecma262/#sec-isarray
        // eslint-disable-next-line es/no-array-isarray -- safe
        var isArray = Array.isArray || function isArray(arg) {
          return classofRaw(arg) == 'Array';
        };

        /* eslint-disable es/no-object-getownpropertynames -- safe */

        var $getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;

        var toString = {}.toString;

        var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames
          ? Object.getOwnPropertyNames(window) : [];

        var getWindowNames = function (it) {
          try {
            return $getOwnPropertyNames$1(it);
          } catch (error) {
            return windowNames.slice();
          }
        };

        // fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window
        var f$1 = function getOwnPropertyNames(it) {
          return windowNames && toString.call(it) == '[object Window]'
            ? getWindowNames(it)
            : $getOwnPropertyNames$1(toIndexedObject(it));
        };

        var objectGetOwnPropertyNamesExternal = {
                f: f$1
        };

        var aFunction = function (it) {
          if (typeof it != 'function') {
            throw TypeError(String(it) + ' is not a function');
          } return it;
        };

        // optional / simple context binding
        var functionBindContext = function (fn, that, length) {
          aFunction(fn);
          if (that === undefined) return fn;
          switch (length) {
            case 0: return function () {
              return fn.call(that);
            };
            case 1: return function (a) {
              return fn.call(that, a);
            };
            case 2: return function (a, b) {
              return fn.call(that, a, b);
            };
            case 3: return function (a, b, c) {
              return fn.call(that, a, b, c);
            };
          }
          return function (/* ...args */) {
            return fn.apply(that, arguments);
          };
        };

        var SPECIES$6 = wellKnownSymbol('species');

        // `ArraySpeciesCreate` abstract operation
        // https://tc39.es/ecma262/#sec-arrayspeciescreate
        var arraySpeciesCreate = function (originalArray, length) {
          var C;
          if (isArray(originalArray)) {
            C = originalArray.constructor;
            // cross-realm fallback
            if (typeof C == 'function' && (C === Array || isArray(C.prototype))) C = undefined;
            else if (isObject$4(C)) {
              C = C[SPECIES$6];
              if (C === null) C = undefined;
            }
          } return new (C === undefined ? Array : C)(length === 0 ? 0 : length);
        };

        var push = [].push;

        // `Array.prototype.{ forEach, map, filter, some, every, find, findIndex, filterOut }` methods implementation
        var createMethod$4 = function (TYPE) {
          var IS_MAP = TYPE == 1;
          var IS_FILTER = TYPE == 2;
          var IS_SOME = TYPE == 3;
          var IS_EVERY = TYPE == 4;
          var IS_FIND_INDEX = TYPE == 6;
          var IS_FILTER_OUT = TYPE == 7;
          var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
          return function ($this, callbackfn, that, specificCreate) {
            var O = toObject($this);
            var self = indexedObject(O);
            var boundFunction = functionBindContext(callbackfn, that, 3);
            var length = toLength(self.length);
            var index = 0;
            var create = specificCreate || arraySpeciesCreate;
            var target = IS_MAP ? create($this, length) : IS_FILTER || IS_FILTER_OUT ? create($this, 0) : undefined;
            var value, result;
            for (;length > index; index++) if (NO_HOLES || index in self) {
              value = self[index];
              result = boundFunction(value, index, O);
              if (TYPE) {
                if (IS_MAP) target[index] = result; // map
                else if (result) switch (TYPE) {
                  case 3: return true;              // some
                  case 5: return value;             // find
                  case 6: return index;             // findIndex
                  case 2: push.call(target, value); // filter
                } else switch (TYPE) {
                  case 4: return false;             // every
                  case 7: push.call(target, value); // filterOut
                }
              }
            }
            return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;
          };
        };

        var arrayIteration = {
          // `Array.prototype.forEach` method
          // https://tc39.es/ecma262/#sec-array.prototype.foreach
          forEach: createMethod$4(0),
          // `Array.prototype.map` method
          // https://tc39.es/ecma262/#sec-array.prototype.map
          map: createMethod$4(1),
          // `Array.prototype.filter` method
          // https://tc39.es/ecma262/#sec-array.prototype.filter
          filter: createMethod$4(2),
          // `Array.prototype.some` method
          // https://tc39.es/ecma262/#sec-array.prototype.some
          some: createMethod$4(3),
          // `Array.prototype.every` method
          // https://tc39.es/ecma262/#sec-array.prototype.every
          every: createMethod$4(4),
          // `Array.prototype.find` method
          // https://tc39.es/ecma262/#sec-array.prototype.find
          find: createMethod$4(5),
          // `Array.prototype.findIndex` method
          // https://tc39.es/ecma262/#sec-array.prototype.findIndex
          findIndex: createMethod$4(6),
          // `Array.prototype.filterOut` method
          // https://github.com/tc39/proposal-array-filtering
          filterOut: createMethod$4(7)
        };

        var $forEach$2 = arrayIteration.forEach;

        var HIDDEN = sharedKey('hidden');
        var SYMBOL = 'Symbol';
        var PROTOTYPE$1 = 'prototype';
        var TO_PRIMITIVE = wellKnownSymbol('toPrimitive');
        var setInternalState$5 = internalState.set;
        var getInternalState$3 = internalState.getterFor(SYMBOL);
        var ObjectPrototype$2 = Object[PROTOTYPE$1];
        var $Symbol = global$2.Symbol;
        var $stringify = getBuiltIn('JSON', 'stringify');
        var nativeGetOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
        var nativeDefineProperty = objectDefineProperty.f;
        var nativeGetOwnPropertyNames = objectGetOwnPropertyNamesExternal.f;
        var nativePropertyIsEnumerable = objectPropertyIsEnumerable.f;
        var AllSymbols = shared('symbols');
        var ObjectPrototypeSymbols = shared('op-symbols');
        var StringToSymbolRegistry = shared('string-to-symbol-registry');
        var SymbolToStringRegistry = shared('symbol-to-string-registry');
        var WellKnownSymbolsStore = shared('wks');
        var QObject = global$2.QObject;
        // Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173
        var USE_SETTER = !QObject || !QObject[PROTOTYPE$1] || !QObject[PROTOTYPE$1].findChild;

        // fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687
        var setSymbolDescriptor = descriptors && fails(function () {
          return objectCreate(nativeDefineProperty({}, 'a', {
            get: function () { return nativeDefineProperty(this, 'a', { value: 7 }).a; }
          })).a != 7;
        }) ? function (O, P, Attributes) {
          var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor$1(ObjectPrototype$2, P);
          if (ObjectPrototypeDescriptor) delete ObjectPrototype$2[P];
          nativeDefineProperty(O, P, Attributes);
          if (ObjectPrototypeDescriptor && O !== ObjectPrototype$2) {
            nativeDefineProperty(ObjectPrototype$2, P, ObjectPrototypeDescriptor);
          }
        } : nativeDefineProperty;

        var wrap$2 = function (tag, description) {
          var symbol = AllSymbols[tag] = objectCreate($Symbol[PROTOTYPE$1]);
          setInternalState$5(symbol, {
            type: SYMBOL,
            tag: tag,
            description: description
          });
          if (!descriptors) symbol.description = description;
          return symbol;
        };

        var isSymbol$1 = useSymbolAsUid ? function (it) {
          return typeof it == 'symbol';
        } : function (it) {
          return Object(it) instanceof $Symbol;
        };

        var $defineProperty = function defineProperty(O, P, Attributes) {
          if (O === ObjectPrototype$2) $defineProperty(ObjectPrototypeSymbols, P, Attributes);
          anObject(O);
          var key = toPrimitive(P, true);
          anObject(Attributes);
          if (has$1(AllSymbols, key)) {
            if (!Attributes.enumerable) {
              if (!has$1(O, HIDDEN)) nativeDefineProperty(O, HIDDEN, createPropertyDescriptor(1, {}));
              O[HIDDEN][key] = true;
            } else {
              if (has$1(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
              Attributes = objectCreate(Attributes, { enumerable: createPropertyDescriptor(0, false) });
            } return setSymbolDescriptor(O, key, Attributes);
          } return nativeDefineProperty(O, key, Attributes);
        };

        var $defineProperties = function defineProperties(O, Properties) {
          anObject(O);
          var properties = toIndexedObject(Properties);
          var keys = objectKeys(properties).concat($getOwnPropertySymbols(properties));
          $forEach$2(keys, function (key) {
            if (!descriptors || $propertyIsEnumerable.call(properties, key)) $defineProperty(O, key, properties[key]);
          });
          return O;
        };

        var $create = function create(O, Properties) {
          return Properties === undefined ? objectCreate(O) : $defineProperties(objectCreate(O), Properties);
        };

        var $propertyIsEnumerable = function propertyIsEnumerable(V) {
          var P = toPrimitive(V, true);
          var enumerable = nativePropertyIsEnumerable.call(this, P);
          if (this === ObjectPrototype$2 && has$1(AllSymbols, P) && !has$1(ObjectPrototypeSymbols, P)) return false;
          return enumerable || !has$1(this, P) || !has$1(AllSymbols, P) || has$1(this, HIDDEN) && this[HIDDEN][P] ? enumerable : true;
        };

        var $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(O, P) {
          var it = toIndexedObject(O);
          var key = toPrimitive(P, true);
          if (it === ObjectPrototype$2 && has$1(AllSymbols, key) && !has$1(ObjectPrototypeSymbols, key)) return;
          var descriptor = nativeGetOwnPropertyDescriptor$1(it, key);
          if (descriptor && has$1(AllSymbols, key) && !(has$1(it, HIDDEN) && it[HIDDEN][key])) {
            descriptor.enumerable = true;
          }
          return descriptor;
        };

        var $getOwnPropertyNames = function getOwnPropertyNames(O) {
          var names = nativeGetOwnPropertyNames(toIndexedObject(O));
          var result = [];
          $forEach$2(names, function (key) {
            if (!has$1(AllSymbols, key) && !has$1(hiddenKeys$1, key)) result.push(key);
          });
          return result;
        };

        var $getOwnPropertySymbols = function getOwnPropertySymbols(O) {
          var IS_OBJECT_PROTOTYPE = O === ObjectPrototype$2;
          var names = nativeGetOwnPropertyNames(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject(O));
          var result = [];
          $forEach$2(names, function (key) {
            if (has$1(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has$1(ObjectPrototype$2, key))) {
              result.push(AllSymbols[key]);
            }
          });
          return result;
        };

        // `Symbol` constructor
        // https://tc39.es/ecma262/#sec-symbol-constructor
        if (!nativeSymbol) {
          $Symbol = function Symbol() {
            if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor');
            var description = !arguments.length || arguments[0] === undefined ? undefined : String(arguments[0]);
            var tag = uid(description);
            var setter = function (value) {
              if (this === ObjectPrototype$2) setter.call(ObjectPrototypeSymbols, value);
              if (has$1(this, HIDDEN) && has$1(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
              setSymbolDescriptor(this, tag, createPropertyDescriptor(1, value));
            };
            if (descriptors && USE_SETTER) setSymbolDescriptor(ObjectPrototype$2, tag, { configurable: true, set: setter });
            return wrap$2(tag, description);
          };

          redefine($Symbol[PROTOTYPE$1], 'toString', function toString() {
            return getInternalState$3(this).tag;
          });

          redefine($Symbol, 'withoutSetter', function (description) {
            return wrap$2(uid(description), description);
          });

          objectPropertyIsEnumerable.f = $propertyIsEnumerable;
          objectDefineProperty.f = $defineProperty;
          objectGetOwnPropertyDescriptor.f = $getOwnPropertyDescriptor;
          objectGetOwnPropertyNames.f = objectGetOwnPropertyNamesExternal.f = $getOwnPropertyNames;
          objectGetOwnPropertySymbols.f = $getOwnPropertySymbols;

          wellKnownSymbolWrapped.f = function (name) {
            return wrap$2(wellKnownSymbol(name), name);
          };

          if (descriptors) {
            // https://github.com/tc39/proposal-Symbol-description
            nativeDefineProperty($Symbol[PROTOTYPE$1], 'description', {
              configurable: true,
              get: function description() {
                return getInternalState$3(this).description;
              }
            });
            {
              redefine(ObjectPrototype$2, 'propertyIsEnumerable', $propertyIsEnumerable, { unsafe: true });
            }
          }
        }

        _export({ global: true, wrap: true, forced: !nativeSymbol, sham: !nativeSymbol }, {
          Symbol: $Symbol
        });

        $forEach$2(objectKeys(WellKnownSymbolsStore), function (name) {
          defineWellKnownSymbol(name);
        });

        _export({ target: SYMBOL, stat: true, forced: !nativeSymbol }, {
          // `Symbol.for` method
          // https://tc39.es/ecma262/#sec-symbol.for
          'for': function (key) {
            var string = String(key);
            if (has$1(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];
            var symbol = $Symbol(string);
            StringToSymbolRegistry[string] = symbol;
            SymbolToStringRegistry[symbol] = string;
            return symbol;
          },
          // `Symbol.keyFor` method
          // https://tc39.es/ecma262/#sec-symbol.keyfor
          keyFor: function keyFor(sym) {
            if (!isSymbol$1(sym)) throw TypeError(sym + ' is not a symbol');
            if (has$1(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];
          },
          useSetter: function () { USE_SETTER = true; },
          useSimple: function () { USE_SETTER = false; }
        });

        _export({ target: 'Object', stat: true, forced: !nativeSymbol, sham: !descriptors }, {
          // `Object.create` method
          // https://tc39.es/ecma262/#sec-object.create
          create: $create,
          // `Object.defineProperty` method
          // https://tc39.es/ecma262/#sec-object.defineproperty
          defineProperty: $defineProperty,
          // `Object.defineProperties` method
          // https://tc39.es/ecma262/#sec-object.defineproperties
          defineProperties: $defineProperties,
          // `Object.getOwnPropertyDescriptor` method
          // https://tc39.es/ecma262/#sec-object.getownpropertydescriptors
          getOwnPropertyDescriptor: $getOwnPropertyDescriptor
        });

        _export({ target: 'Object', stat: true, forced: !nativeSymbol }, {
          // `Object.getOwnPropertyNames` method
          // https://tc39.es/ecma262/#sec-object.getownpropertynames
          getOwnPropertyNames: $getOwnPropertyNames,
          // `Object.getOwnPropertySymbols` method
          // https://tc39.es/ecma262/#sec-object.getownpropertysymbols
          getOwnPropertySymbols: $getOwnPropertySymbols
        });

        // Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives
        // https://bugs.chromium.org/p/v8/issues/detail?id=3443
        _export({ target: 'Object', stat: true, forced: fails(function () { objectGetOwnPropertySymbols.f(1); }) }, {
          getOwnPropertySymbols: function getOwnPropertySymbols(it) {
            return objectGetOwnPropertySymbols.f(toObject(it));
          }
        });

        // `JSON.stringify` method behavior with symbols
        // https://tc39.es/ecma262/#sec-json.stringify
        if ($stringify) {
          var FORCED_JSON_STRINGIFY = !nativeSymbol || fails(function () {
            var symbol = $Symbol();
            // MS Edge converts symbol values to JSON as {}
            return $stringify([symbol]) != '[null]'
              // WebKit converts symbol values to JSON as null
              || $stringify({ a: symbol }) != '{}'
              // V8 throws on boxed symbols
              || $stringify(Object(symbol)) != '{}';
          });

          _export({ target: 'JSON', stat: true, forced: FORCED_JSON_STRINGIFY }, {
            // eslint-disable-next-line no-unused-vars -- required for `.length`
            stringify: function stringify(it, replacer, space) {
              var args = [it];
              var index = 1;
              var $replacer;
              while (arguments.length > index) args.push(arguments[index++]);
              $replacer = replacer;
              if (!isObject$4(replacer) && it === undefined || isSymbol$1(it)) return; // IE8 returns string on undefined
              if (!isArray(replacer)) replacer = function (key, value) {
                if (typeof $replacer == 'function') value = $replacer.call(this, key, value);
                if (!isSymbol$1(value)) return value;
              };
              args[1] = replacer;
              return $stringify.apply(null, args);
            }
          });
        }

        // `Symbol.prototype[@@toPrimitive]` method
        // https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive
        if (!$Symbol[PROTOTYPE$1][TO_PRIMITIVE]) {
          createNonEnumerableProperty($Symbol[PROTOTYPE$1], TO_PRIMITIVE, $Symbol[PROTOTYPE$1].valueOf);
        }
        // `Symbol.prototype[@@toStringTag]` property
        // https://tc39.es/ecma262/#sec-symbol.prototype-@@tostringtag
        setToStringTag($Symbol, SYMBOL);

        hiddenKeys$1[HIDDEN] = true;

        var defineProperty$7 = objectDefineProperty.f;


        var NativeSymbol = global$2.Symbol;

        if (descriptors && typeof NativeSymbol == 'function' && (!('description' in NativeSymbol.prototype) ||
          // Safari 12 bug
          NativeSymbol().description !== undefined
        )) {
          var EmptyStringDescriptionStore = {};
          // wrap Symbol constructor for correct work with undefined description
          var SymbolWrapper = function Symbol() {
            var description = arguments.length < 1 || arguments[0] === undefined ? undefined : String(arguments[0]);
            var result = this instanceof SymbolWrapper
              ? new NativeSymbol(description)
              // in Edge 13, String(Symbol(undefined)) === 'Symbol(undefined)'
              : description === undefined ? NativeSymbol() : NativeSymbol(description);
            if (description === '') EmptyStringDescriptionStore[result] = true;
            return result;
          };
          copyConstructorProperties(SymbolWrapper, NativeSymbol);
          var symbolPrototype = SymbolWrapper.prototype = NativeSymbol.prototype;
          symbolPrototype.constructor = SymbolWrapper;

          var symbolToString = symbolPrototype.toString;
          var native = String(NativeSymbol('test')) == 'Symbol(test)';
          var regexp = /^Symbol\((.*)\)[^)]+$/;
          defineProperty$7(symbolPrototype, 'description', {
            configurable: true,
            get: function description() {
              var symbol = isObject$4(this) ? this.valueOf() : this;
              var string = symbolToString.call(symbol);
              if (has$1(EmptyStringDescriptionStore, symbol)) return '';
              var desc = native ? string.slice(7, -1) : string.replace(regexp, '$1');
              return desc === '' ? undefined : desc;
            }
          });

          _export({ global: true, forced: true }, {
            Symbol: SymbolWrapper
          });
        }

        // eslint-disable-next-line es/no-typed-arrays -- safe
        var arrayBufferNative = typeof ArrayBuffer !== 'undefined' && typeof DataView !== 'undefined';

        var redefineAll = function (target, src, options) {
          for (var key in src) redefine(target, key, src[key], options);
          return target;
        };

        var anInstance = function (it, Constructor, name) {
          if (!(it instanceof Constructor)) {
            throw TypeError('Incorrect ' + (name ? name + ' ' : '') + 'invocation');
          } return it;
        };

        // `ToIndex` abstract operation
        // https://tc39.es/ecma262/#sec-toindex
        var toIndex = function (it) {
          if (it === undefined) return 0;
          var number = toInteger(it);
          var length = toLength(number);
          if (number !== length) throw RangeError('Wrong length or index');
          return length;
        };

        // IEEE754 conversions based on https://github.com/feross/ieee754
        var abs$4 = Math.abs;
        var pow$2 = Math.pow;
        var floor$6 = Math.floor;
        var log$2 = Math.log;
        var LN2 = Math.LN2;

        var pack = function (number, mantissaLength, bytes) {
          var buffer = new Array(bytes);
          var exponentLength = bytes * 8 - mantissaLength - 1;
          var eMax = (1 << exponentLength) - 1;
          var eBias = eMax >> 1;
          var rt = mantissaLength === 23 ? pow$2(2, -24) - pow$2(2, -77) : 0;
          var sign = number < 0 || number === 0 && 1 / number < 0 ? 1 : 0;
          var index = 0;
          var exponent, mantissa, c;
          number = abs$4(number);
          // eslint-disable-next-line no-self-compare -- NaN check
          if (number != number || number === Infinity) {
            // eslint-disable-next-line no-self-compare -- NaN check
            mantissa = number != number ? 1 : 0;
            exponent = eMax;
          } else {
            exponent = floor$6(log$2(number) / LN2);
            if (number * (c = pow$2(2, -exponent)) < 1) {
              exponent--;
              c *= 2;
            }
            if (exponent + eBias >= 1) {
              number += rt / c;
            } else {
              number += rt * pow$2(2, 1 - eBias);
            }
            if (number * c >= 2) {
              exponent++;
              c /= 2;
            }
            if (exponent + eBias >= eMax) {
              mantissa = 0;
              exponent = eMax;
            } else if (exponent + eBias >= 1) {
              mantissa = (number * c - 1) * pow$2(2, mantissaLength);
              exponent = exponent + eBias;
            } else {
              mantissa = number * pow$2(2, eBias - 1) * pow$2(2, mantissaLength);
              exponent = 0;
            }
          }
          for (; mantissaLength >= 8; buffer[index++] = mantissa & 255, mantissa /= 256, mantissaLength -= 8);
          exponent = exponent << mantissaLength | mantissa;
          exponentLength += mantissaLength;
          for (; exponentLength > 0; buffer[index++] = exponent & 255, exponent /= 256, exponentLength -= 8);
          buffer[--index] |= sign * 128;
          return buffer;
        };

        var unpack = function (buffer, mantissaLength) {
          var bytes = buffer.length;
          var exponentLength = bytes * 8 - mantissaLength - 1;
          var eMax = (1 << exponentLength) - 1;
          var eBias = eMax >> 1;
          var nBits = exponentLength - 7;
          var index = bytes - 1;
          var sign = buffer[index--];
          var exponent = sign & 127;
          var mantissa;
          sign >>= 7;
          for (; nBits > 0; exponent = exponent * 256 + buffer[index], index--, nBits -= 8);
          mantissa = exponent & (1 << -nBits) - 1;
          exponent >>= -nBits;
          nBits += mantissaLength;
          for (; nBits > 0; mantissa = mantissa * 256 + buffer[index], index--, nBits -= 8);
          if (exponent === 0) {
            exponent = 1 - eBias;
          } else if (exponent === eMax) {
            return mantissa ? NaN : sign ? -Infinity : Infinity;
          } else {
            mantissa = mantissa + pow$2(2, mantissaLength);
            exponent = exponent - eBias;
          } return (sign ? -1 : 1) * mantissa * pow$2(2, exponent - mantissaLength);
        };

        var ieee754$1 = {
          pack: pack,
          unpack: unpack
        };

        // `Array.prototype.fill` method implementation
        // https://tc39.es/ecma262/#sec-array.prototype.fill
        var arrayFill = function fill(value /* , start = 0, end = @length */) {
          var O = toObject(this);
          var length = toLength(O.length);
          var argumentsLength = arguments.length;
          var index = toAbsoluteIndex(argumentsLength > 1 ? arguments[1] : undefined, length);
          var end = argumentsLength > 2 ? arguments[2] : undefined;
          var endPos = end === undefined ? length : toAbsoluteIndex(end, length);
          while (endPos > index) O[index++] = value;
          return O;
        };

        var getOwnPropertyNames$3 = objectGetOwnPropertyNames.f;
        var defineProperty$6 = objectDefineProperty.f;




        var getInternalState$2 = internalState.get;
        var setInternalState$4 = internalState.set;
        var ARRAY_BUFFER$1 = 'ArrayBuffer';
        var DATA_VIEW = 'DataView';
        var PROTOTYPE = 'prototype';
        var WRONG_LENGTH = 'Wrong length';
        var WRONG_INDEX = 'Wrong index';
        var NativeArrayBuffer$1 = global$2[ARRAY_BUFFER$1];
        var $ArrayBuffer = NativeArrayBuffer$1;
        var $DataView = global$2[DATA_VIEW];
        var $DataViewPrototype = $DataView && $DataView[PROTOTYPE];
        var ObjectPrototype$1 = Object.prototype;
        var RangeError$1 = global$2.RangeError;

        var packIEEE754 = ieee754$1.pack;
        var unpackIEEE754 = ieee754$1.unpack;

        var packInt8 = function (number) {
          return [number & 0xFF];
        };

        var packInt16 = function (number) {
          return [number & 0xFF, number >> 8 & 0xFF];
        };

        var packInt32 = function (number) {
          return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF];
        };

        var unpackInt32 = function (buffer) {
          return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
        };

        var packFloat32 = function (number) {
          return packIEEE754(number, 23, 4);
        };

        var packFloat64 = function (number) {
          return packIEEE754(number, 52, 8);
        };

        var addGetter = function (Constructor, key) {
          defineProperty$6(Constructor[PROTOTYPE], key, { get: function () { return getInternalState$2(this)[key]; } });
        };

        var get$4 = function (view, count, index, isLittleEndian) {
          var intIndex = toIndex(index);
          var store = getInternalState$2(view);
          if (intIndex + count > store.byteLength) throw RangeError$1(WRONG_INDEX);
          var bytes = getInternalState$2(store.buffer).bytes;
          var start = intIndex + store.byteOffset;
          var pack = bytes.slice(start, start + count);
          return isLittleEndian ? pack : pack.reverse();
        };

        var set$3 = function (view, count, index, conversion, value, isLittleEndian) {
          var intIndex = toIndex(index);
          var store = getInternalState$2(view);
          if (intIndex + count > store.byteLength) throw RangeError$1(WRONG_INDEX);
          var bytes = getInternalState$2(store.buffer).bytes;
          var start = intIndex + store.byteOffset;
          var pack = conversion(+value);
          for (var i = 0; i < count; i++) bytes[start + i] = pack[isLittleEndian ? i : count - i - 1];
        };

        if (!arrayBufferNative) {
          $ArrayBuffer = function ArrayBuffer(length) {
            anInstance(this, $ArrayBuffer, ARRAY_BUFFER$1);
            var byteLength = toIndex(length);
            setInternalState$4(this, {
              bytes: arrayFill.call(new Array(byteLength), 0),
              byteLength: byteLength
            });
            if (!descriptors) this.byteLength = byteLength;
          };

          $DataView = function DataView(buffer, byteOffset, byteLength) {
            anInstance(this, $DataView, DATA_VIEW);
            anInstance(buffer, $ArrayBuffer, DATA_VIEW);
            var bufferLength = getInternalState$2(buffer).byteLength;
            var offset = toInteger(byteOffset);
            if (offset < 0 || offset > bufferLength) throw RangeError$1('Wrong offset');
            byteLength = byteLength === undefined ? bufferLength - offset : toLength(byteLength);
            if (offset + byteLength > bufferLength) throw RangeError$1(WRONG_LENGTH);
            setInternalState$4(this, {
              buffer: buffer,
              byteLength: byteLength,
              byteOffset: offset
            });
            if (!descriptors) {
              this.buffer = buffer;
              this.byteLength = byteLength;
              this.byteOffset = offset;
            }
          };

          if (descriptors) {
            addGetter($ArrayBuffer, 'byteLength');
            addGetter($DataView, 'buffer');
            addGetter($DataView, 'byteLength');
            addGetter($DataView, 'byteOffset');
          }

          redefineAll($DataView[PROTOTYPE], {
            getInt8: function getInt8(byteOffset) {
              return get$4(this, 1, byteOffset)[0] << 24 >> 24;
            },
            getUint8: function getUint8(byteOffset) {
              return get$4(this, 1, byteOffset)[0];
            },
            getInt16: function getInt16(byteOffset /* , littleEndian */) {
              var bytes = get$4(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
              return (bytes[1] << 8 | bytes[0]) << 16 >> 16;
            },
            getUint16: function getUint16(byteOffset /* , littleEndian */) {
              var bytes = get$4(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
              return bytes[1] << 8 | bytes[0];
            },
            getInt32: function getInt32(byteOffset /* , littleEndian */) {
              return unpackInt32(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined));
            },
            getUint32: function getUint32(byteOffset /* , littleEndian */) {
              return unpackInt32(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0;
            },
            getFloat32: function getFloat32(byteOffset /* , littleEndian */) {
              return unpackIEEE754(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23);
            },
            getFloat64: function getFloat64(byteOffset /* , littleEndian */) {
              return unpackIEEE754(get$4(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52);
            },
            setInt8: function setInt8(byteOffset, value) {
              set$3(this, 1, byteOffset, packInt8, value);
            },
            setUint8: function setUint8(byteOffset, value) {
              set$3(this, 1, byteOffset, packInt8, value);
            },
            setInt16: function setInt16(byteOffset, value /* , littleEndian */) {
              set$3(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
            },
            setUint16: function setUint16(byteOffset, value /* , littleEndian */) {
              set$3(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
            },
            setInt32: function setInt32(byteOffset, value /* , littleEndian */) {
              set$3(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
            },
            setUint32: function setUint32(byteOffset, value /* , littleEndian */) {
              set$3(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
            },
            setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {
              set$3(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined);
            },
            setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {
              set$3(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined);
            }
          });
        } else {
          /* eslint-disable no-new -- required for testing */
          if (!fails(function () {
            NativeArrayBuffer$1(1);
          }) || !fails(function () {
            new NativeArrayBuffer$1(-1);
          }) || fails(function () {
            new NativeArrayBuffer$1();
            new NativeArrayBuffer$1(1.5);
            new NativeArrayBuffer$1(NaN);
            return NativeArrayBuffer$1.name != ARRAY_BUFFER$1;
          })) {
          /* eslint-enable no-new -- required for testing */
            $ArrayBuffer = function ArrayBuffer(length) {
              anInstance(this, $ArrayBuffer);
              return new NativeArrayBuffer$1(toIndex(length));
            };
            var ArrayBufferPrototype = $ArrayBuffer[PROTOTYPE] = NativeArrayBuffer$1[PROTOTYPE];
            for (var keys$2 = getOwnPropertyNames$3(NativeArrayBuffer$1), j$2 = 0, key$1; keys$2.length > j$2;) {
              if (!((key$1 = keys$2[j$2++]) in $ArrayBuffer)) {
                createNonEnumerableProperty($ArrayBuffer, key$1, NativeArrayBuffer$1[key$1]);
              }
            }
            ArrayBufferPrototype.constructor = $ArrayBuffer;
          }

          // WebKit bug - the same parent prototype for typed arrays and data view
          if (objectSetPrototypeOf && objectGetPrototypeOf($DataViewPrototype) !== ObjectPrototype$1) {
            objectSetPrototypeOf($DataViewPrototype, ObjectPrototype$1);
          }

          // iOS Safari 7.x bug
          var testView = new $DataView(new $ArrayBuffer(2));
          var $setInt8 = $DataViewPrototype.setInt8;
          testView.setInt8(0, 2147483648);
          testView.setInt8(1, 2147483649);
          if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll($DataViewPrototype, {
            setInt8: function setInt8(byteOffset, value) {
              $setInt8.call(this, byteOffset, value << 24 >> 24);
            },
            setUint8: function setUint8(byteOffset, value) {
              $setInt8.call(this, byteOffset, value << 24 >> 24);
            }
          }, { unsafe: true });
        }

        setToStringTag($ArrayBuffer, ARRAY_BUFFER$1);
        setToStringTag($DataView, DATA_VIEW);

        var arrayBuffer = {
          ArrayBuffer: $ArrayBuffer,
          DataView: $DataView
        };

        var SPECIES$5 = wellKnownSymbol('species');

        // `SpeciesConstructor` abstract operation
        // https://tc39.es/ecma262/#sec-speciesconstructor
        var speciesConstructor = function (O, defaultConstructor) {
          var C = anObject(O).constructor;
          var S;
          return C === undefined || (S = anObject(C)[SPECIES$5]) == undefined ? defaultConstructor : aFunction(S);
        };

        var ArrayBuffer$3 = arrayBuffer.ArrayBuffer;
        var DataView$1 = arrayBuffer.DataView;
        var nativeArrayBufferSlice = ArrayBuffer$3.prototype.slice;

        var INCORRECT_SLICE = fails(function () {
          return !new ArrayBuffer$3(2).slice(1, undefined).byteLength;
        });

        // `ArrayBuffer.prototype.slice` method
        // https://tc39.es/ecma262/#sec-arraybuffer.prototype.slice
        _export({ target: 'ArrayBuffer', proto: true, unsafe: true, forced: INCORRECT_SLICE }, {
          slice: function slice(start, end) {
            if (nativeArrayBufferSlice !== undefined && end === undefined) {
              return nativeArrayBufferSlice.call(anObject(this), start); // FF fix
            }
            var length = anObject(this).byteLength;
            var first = toAbsoluteIndex(start, length);
            var fin = toAbsoluteIndex(end === undefined ? length : end, length);
            var result = new (speciesConstructor(this, ArrayBuffer$3))(toLength(fin - first));
            var viewSource = new DataView$1(this);
            var viewTarget = new DataView$1(result);
            var index = 0;
            while (first < fin) {
              viewTarget.setUint8(index++, viewSource.getUint8(first++));
            } return result;
          }
        });

        // `DataView` constructor
        // https://tc39.es/ecma262/#sec-dataview-constructor
        _export({ global: true, forced: !arrayBufferNative }, {
          DataView: arrayBuffer.DataView
        });

        var defineProperty$5 = objectDefineProperty.f;





        var Int8Array$3 = global$2.Int8Array;
        var Int8ArrayPrototype = Int8Array$3 && Int8Array$3.prototype;
        var Uint8ClampedArray = global$2.Uint8ClampedArray;
        var Uint8ClampedArrayPrototype = Uint8ClampedArray && Uint8ClampedArray.prototype;
        var TypedArray = Int8Array$3 && objectGetPrototypeOf(Int8Array$3);
        var TypedArrayPrototype = Int8ArrayPrototype && objectGetPrototypeOf(Int8ArrayPrototype);
        var ObjectPrototype = Object.prototype;
        var isPrototypeOf = ObjectPrototype.isPrototypeOf;

        var TO_STRING_TAG = wellKnownSymbol('toStringTag');
        var TYPED_ARRAY_TAG = uid('TYPED_ARRAY_TAG');
        // Fixing native typed arrays in Opera Presto crashes the browser, see #595
        var NATIVE_ARRAY_BUFFER_VIEWS$2 = arrayBufferNative && !!objectSetPrototypeOf && classof(global$2.opera) !== 'Opera';
        var TYPED_ARRAY_TAG_REQIRED = false;
        var NAME$1;

        var TypedArrayConstructorsList = {
          Int8Array: 1,
          Uint8Array: 1,
          Uint8ClampedArray: 1,
          Int16Array: 2,
          Uint16Array: 2,
          Int32Array: 4,
          Uint32Array: 4,
          Float32Array: 4,
          Float64Array: 8
        };

        var BigIntArrayConstructorsList = {
          BigInt64Array: 8,
          BigUint64Array: 8
        };

        var isView = function isView(it) {
          if (!isObject$4(it)) return false;
          var klass = classof(it);
          return klass === 'DataView'
            || has$1(TypedArrayConstructorsList, klass)
            || has$1(BigIntArrayConstructorsList, klass);
        };

        var isTypedArray = function (it) {
          if (!isObject$4(it)) return false;
          var klass = classof(it);
          return has$1(TypedArrayConstructorsList, klass)
            || has$1(BigIntArrayConstructorsList, klass);
        };

        var aTypedArray$m = function (it) {
          if (isTypedArray(it)) return it;
          throw TypeError('Target is not a typed array');
        };

        var aTypedArrayConstructor$4 = function (C) {
          if (objectSetPrototypeOf) {
            if (isPrototypeOf.call(TypedArray, C)) return C;
          } else for (var ARRAY in TypedArrayConstructorsList) if (has$1(TypedArrayConstructorsList, NAME$1)) {
            var TypedArrayConstructor = global$2[ARRAY];
            if (TypedArrayConstructor && (C === TypedArrayConstructor || isPrototypeOf.call(TypedArrayConstructor, C))) {
              return C;
            }
          } throw TypeError('Target is not a typed array constructor');
        };

        var exportTypedArrayMethod$n = function (KEY, property, forced) {
          if (!descriptors) return;
          if (forced) for (var ARRAY in TypedArrayConstructorsList) {
            var TypedArrayConstructor = global$2[ARRAY];
            if (TypedArrayConstructor && has$1(TypedArrayConstructor.prototype, KEY)) try {
              delete TypedArrayConstructor.prototype[KEY];
            } catch (error) { /* empty */ }
          }
          if (!TypedArrayPrototype[KEY] || forced) {
            redefine(TypedArrayPrototype, KEY, forced ? property
              : NATIVE_ARRAY_BUFFER_VIEWS$2 && Int8ArrayPrototype[KEY] || property);
          }
        };

        var exportTypedArrayStaticMethod$1 = function (KEY, property, forced) {
          var ARRAY, TypedArrayConstructor;
          if (!descriptors) return;
          if (objectSetPrototypeOf) {
            if (forced) for (ARRAY in TypedArrayConstructorsList) {
              TypedArrayConstructor = global$2[ARRAY];
              if (TypedArrayConstructor && has$1(TypedArrayConstructor, KEY)) try {
                delete TypedArrayConstructor[KEY];
              } catch (error) { /* empty */ }
            }
            if (!TypedArray[KEY] || forced) {
              // V8 ~ Chrome 49-50 `%TypedArray%` methods are non-writable non-configurable
              try {
                return redefine(TypedArray, KEY, forced ? property : NATIVE_ARRAY_BUFFER_VIEWS$2 && TypedArray[KEY] || property);
              } catch (error) { /* empty */ }
            } else return;
          }
          for (ARRAY in TypedArrayConstructorsList) {
            TypedArrayConstructor = global$2[ARRAY];
            if (TypedArrayConstructor && (!TypedArrayConstructor[KEY] || forced)) {
              redefine(TypedArrayConstructor, KEY, property);
            }
          }
        };

        for (NAME$1 in TypedArrayConstructorsList) {
          if (!global$2[NAME$1]) NATIVE_ARRAY_BUFFER_VIEWS$2 = false;
        }

        // WebKit bug - typed arrays constructors prototype is Object.prototype
        if (!NATIVE_ARRAY_BUFFER_VIEWS$2 || typeof TypedArray != 'function' || TypedArray === Function.prototype) {
          // eslint-disable-next-line no-shadow -- safe
          TypedArray = function TypedArray() {
            throw TypeError('Incorrect invocation');
          };
          if (NATIVE_ARRAY_BUFFER_VIEWS$2) for (NAME$1 in TypedArrayConstructorsList) {
            if (global$2[NAME$1]) objectSetPrototypeOf(global$2[NAME$1], TypedArray);
          }
        }

        if (!NATIVE_ARRAY_BUFFER_VIEWS$2 || !TypedArrayPrototype || TypedArrayPrototype === ObjectPrototype) {
          TypedArrayPrototype = TypedArray.prototype;
          if (NATIVE_ARRAY_BUFFER_VIEWS$2) for (NAME$1 in TypedArrayConstructorsList) {
            if (global$2[NAME$1]) objectSetPrototypeOf(global$2[NAME$1].prototype, TypedArrayPrototype);
          }
        }

        // WebKit bug - one more object in Uint8ClampedArray prototype chain
        if (NATIVE_ARRAY_BUFFER_VIEWS$2 && objectGetPrototypeOf(Uint8ClampedArrayPrototype) !== TypedArrayPrototype) {
          objectSetPrototypeOf(Uint8ClampedArrayPrototype, TypedArrayPrototype);
        }

        if (descriptors && !has$1(TypedArrayPrototype, TO_STRING_TAG)) {
          TYPED_ARRAY_TAG_REQIRED = true;
          defineProperty$5(TypedArrayPrototype, TO_STRING_TAG, { get: function () {
            return isObject$4(this) ? this[TYPED_ARRAY_TAG] : undefined;
          } });
          for (NAME$1 in TypedArrayConstructorsList) if (global$2[NAME$1]) {
            createNonEnumerableProperty(global$2[NAME$1], TYPED_ARRAY_TAG, NAME$1);
          }
        }

        var arrayBufferViewCore = {
          NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS$2,
          TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQIRED && TYPED_ARRAY_TAG,
          aTypedArray: aTypedArray$m,
          aTypedArrayConstructor: aTypedArrayConstructor$4,
          exportTypedArrayMethod: exportTypedArrayMethod$n,
          exportTypedArrayStaticMethod: exportTypedArrayStaticMethod$1,
          isView: isView,
          isTypedArray: isTypedArray,
          TypedArray: TypedArray,
          TypedArrayPrototype: TypedArrayPrototype
        };

        var NATIVE_ARRAY_BUFFER_VIEWS$1 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;

        // `ArrayBuffer.isView` method
        // https://tc39.es/ecma262/#sec-arraybuffer.isview
        _export({ target: 'ArrayBuffer', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS$1 }, {
          isView: arrayBufferViewCore.isView
        });

        var SPECIES$4 = wellKnownSymbol('species');

        var setSpecies = function (CONSTRUCTOR_NAME) {
          var Constructor = getBuiltIn(CONSTRUCTOR_NAME);
          var defineProperty = objectDefineProperty.f;

          if (descriptors && Constructor && !Constructor[SPECIES$4]) {
            defineProperty(Constructor, SPECIES$4, {
              configurable: true,
              get: function () { return this; }
            });
          }
        };

        var ARRAY_BUFFER = 'ArrayBuffer';
        var ArrayBuffer$2 = arrayBuffer[ARRAY_BUFFER];
        var NativeArrayBuffer = global$2[ARRAY_BUFFER];

        // `ArrayBuffer` constructor
        // https://tc39.es/ecma262/#sec-arraybuffer-constructor
        _export({ global: true, forced: NativeArrayBuffer !== ArrayBuffer$2 }, {
          ArrayBuffer: ArrayBuffer$2
        });

        setSpecies(ARRAY_BUFFER);

        var arrayMethodIsStrict = function (METHOD_NAME, argument) {
          var method = [][METHOD_NAME];
          return !!method && fails(function () {
            // eslint-disable-next-line no-useless-call,no-throw-literal -- required for testing
            method.call(null, argument || function () { throw 1; }, 1);
          });
        };

        /* eslint-disable es/no-array-prototype-indexof -- required for testing */

        var $indexOf$1 = arrayIncludes.indexOf;


        var nativeIndexOf = [].indexOf;

        var NEGATIVE_ZERO$1 = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;
        var STRICT_METHOD$7 = arrayMethodIsStrict('indexOf');

        // `Array.prototype.indexOf` method
        // https://tc39.es/ecma262/#sec-array.prototype.indexof
        _export({ target: 'Array', proto: true, forced: NEGATIVE_ZERO$1 || !STRICT_METHOD$7 }, {
          indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {
            return NEGATIVE_ZERO$1
              // convert -0 to +0
              ? nativeIndexOf.apply(this, arguments) || 0
              : $indexOf$1(this, searchElement, arguments.length > 1 ? arguments[1] : undefined);
          }
        });

        var SPECIES$3 = wellKnownSymbol('species');

        var arrayMethodHasSpeciesSupport = function (METHOD_NAME) {
          // We can't use this feature detection in V8 since it causes
          // deoptimization and serious performance degradation
          // https://github.com/zloirock/core-js/issues/677
          return engineV8Version >= 51 || !fails(function () {
            var array = [];
            var constructor = array.constructor = {};
            constructor[SPECIES$3] = function () {
              return { foo: 1 };
            };
            return array[METHOD_NAME](Boolean).foo !== 1;
          });
        };

        var $map$1 = arrayIteration.map;


        var HAS_SPECIES_SUPPORT$3 = arrayMethodHasSpeciesSupport('map');

        // `Array.prototype.map` method
        // https://tc39.es/ecma262/#sec-array.prototype.map
        // with adding support of @@species
        _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$3 }, {
          map: function map(callbackfn /* , thisArg */) {
            return $map$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          }
        });

        var $forEach$1 = arrayIteration.forEach;


        var STRICT_METHOD$6 = arrayMethodIsStrict('forEach');

        // `Array.prototype.forEach` method implementation
        // https://tc39.es/ecma262/#sec-array.prototype.foreach
        var arrayForEach = !STRICT_METHOD$6 ? function forEach(callbackfn /* , thisArg */) {
          return $forEach$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
        // eslint-disable-next-line es/no-array-prototype-foreach -- safe
        } : [].forEach;

        // `Array.prototype.forEach` method
        // https://tc39.es/ecma262/#sec-array.prototype.foreach
        // eslint-disable-next-line es/no-array-prototype-foreach -- safe
        _export({ target: 'Array', proto: true, forced: [].forEach != arrayForEach }, {
          forEach: arrayForEach
        });

        for (var COLLECTION_NAME in domIterables) {
          var Collection = global$2[COLLECTION_NAME];
          var CollectionPrototype = Collection && Collection.prototype;
          // some Chrome versions have non-configurable methods on DOMTokenList
          if (CollectionPrototype && CollectionPrototype.forEach !== arrayForEach) try {
            createNonEnumerableProperty(CollectionPrototype, 'forEach', arrayForEach);
          } catch (error) {
            CollectionPrototype.forEach = arrayForEach;
          }
        }

        // `Array.isArray` method
        // https://tc39.es/ecma262/#sec-array.isarray
        _export({ target: 'Array', stat: true }, {
          isArray: isArray
        });

        var getOwnPropertyNames$2 = objectGetOwnPropertyNamesExternal.f;

        // eslint-disable-next-line es/no-object-getownpropertynames -- required for testing
        var FAILS_ON_PRIMITIVES$4 = fails(function () { return !Object.getOwnPropertyNames(1); });

        // `Object.getOwnPropertyNames` method
        // https://tc39.es/ecma262/#sec-object.getownpropertynames
        _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$4 }, {
          getOwnPropertyNames: getOwnPropertyNames$2
        });

        var nativePromiseConstructor = global$2.Promise;

        var ITERATOR$5 = wellKnownSymbol('iterator');
        var ArrayPrototype = Array.prototype;

        // check on default Array iterator
        var isArrayIteratorMethod = function (it) {
          return it !== undefined && (iterators.Array === it || ArrayPrototype[ITERATOR$5] === it);
        };

        var ITERATOR$4 = wellKnownSymbol('iterator');

        var getIteratorMethod = function (it) {
          if (it != undefined) return it[ITERATOR$4]
            || it['@@iterator']
            || iterators[classof(it)];
        };

        var iteratorClose = function (iterator) {
          var returnMethod = iterator['return'];
          if (returnMethod !== undefined) {
            return anObject(returnMethod.call(iterator)).value;
          }
        };

        var Result = function (stopped, result) {
          this.stopped = stopped;
          this.result = result;
        };

        var iterate = function (iterable, unboundFunction, options) {
          var that = options && options.that;
          var AS_ENTRIES = !!(options && options.AS_ENTRIES);
          var IS_ITERATOR = !!(options && options.IS_ITERATOR);
          var INTERRUPTED = !!(options && options.INTERRUPTED);
          var fn = functionBindContext(unboundFunction, that, 1 + AS_ENTRIES + INTERRUPTED);
          var iterator, iterFn, index, length, result, next, step;

          var stop = function (condition) {
            if (iterator) iteratorClose(iterator);
            return new Result(true, condition);
          };

          var callFn = function (value) {
            if (AS_ENTRIES) {
              anObject(value);
              return INTERRUPTED ? fn(value[0], value[1], stop) : fn(value[0], value[1]);
            } return INTERRUPTED ? fn(value, stop) : fn(value);
          };

          if (IS_ITERATOR) {
            iterator = iterable;
          } else {
            iterFn = getIteratorMethod(iterable);
            if (typeof iterFn != 'function') throw TypeError('Target is not iterable');
            // optimisation for array iterators
            if (isArrayIteratorMethod(iterFn)) {
              for (index = 0, length = toLength(iterable.length); length > index; index++) {
                result = callFn(iterable[index]);
                if (result && result instanceof Result) return result;
              } return new Result(false);
            }
            iterator = iterFn.call(iterable);
          }

          next = iterator.next;
          while (!(step = next.call(iterator)).done) {
            try {
              result = callFn(step.value);
            } catch (error) {
              iteratorClose(iterator);
              throw error;
            }
            if (typeof result == 'object' && result && result instanceof Result) return result;
          } return new Result(false);
        };

        var ITERATOR$3 = wellKnownSymbol('iterator');
        var SAFE_CLOSING = false;

        try {
          var called = 0;
          var iteratorWithReturn = {
            next: function () {
              return { done: !!called++ };
            },
            'return': function () {
              SAFE_CLOSING = true;
            }
          };
          iteratorWithReturn[ITERATOR$3] = function () {
            return this;
          };
          // eslint-disable-next-line es/no-array-from, no-throw-literal -- required for testing
          Array.from(iteratorWithReturn, function () { throw 2; });
        } catch (error) { /* empty */ }

        var checkCorrectnessOfIteration = function (exec, SKIP_CLOSING) {
          if (!SKIP_CLOSING && !SAFE_CLOSING) return false;
          var ITERATION_SUPPORT = false;
          try {
            var object = {};
            object[ITERATOR$3] = function () {
              return {
                next: function () {
                  return { done: ITERATION_SUPPORT = true };
                }
              };
            };
            exec(object);
          } catch (error) { /* empty */ }
          return ITERATION_SUPPORT;
        };

        var engineIsIos = /(?:iphone|ipod|ipad).*applewebkit/i.test(engineUserAgent);

        var engineIsNode = classofRaw(global$2.process) == 'process';

        var location$1 = global$2.location;
        var set$2 = global$2.setImmediate;
        var clear = global$2.clearImmediate;
        var process$3 = global$2.process;
        var MessageChannel = global$2.MessageChannel;
        var Dispatch$1 = global$2.Dispatch;
        var counter = 0;
        var queue = {};
        var ONREADYSTATECHANGE = 'onreadystatechange';
        var defer, channel, port;

        var run = function (id) {
          // eslint-disable-next-line no-prototype-builtins -- safe
          if (queue.hasOwnProperty(id)) {
            var fn = queue[id];
            delete queue[id];
            fn();
          }
        };

        var runner = function (id) {
          return function () {
            run(id);
          };
        };

        var listener = function (event) {
          run(event.data);
        };

        var post = function (id) {
          // old engines have not location.origin
          global$2.postMessage(id + '', location$1.protocol + '//' + location$1.host);
        };

        // Node.js 0.9+ & IE10+ has setImmediate, otherwise:
        if (!set$2 || !clear) {
          set$2 = function setImmediate(fn) {
            var args = [];
            var i = 1;
            while (arguments.length > i) args.push(arguments[i++]);
            queue[++counter] = function () {
              // eslint-disable-next-line no-new-func -- spec requirement
              (typeof fn == 'function' ? fn : Function(fn)).apply(undefined, args);
            };
            defer(counter);
            return counter;
          };
          clear = function clearImmediate(id) {
            delete queue[id];
          };
          // Node.js 0.8-
          if (engineIsNode) {
            defer = function (id) {
              process$3.nextTick(runner(id));
            };
          // Sphere (JS game engine) Dispatch API
          } else if (Dispatch$1 && Dispatch$1.now) {
            defer = function (id) {
              Dispatch$1.now(runner(id));
            };
          // Browsers with MessageChannel, includes WebWorkers
          // except iOS - https://github.com/zloirock/core-js/issues/624
          } else if (MessageChannel && !engineIsIos) {
            channel = new MessageChannel();
            port = channel.port2;
            channel.port1.onmessage = listener;
            defer = functionBindContext(port.postMessage, port, 1);
          // Browsers with postMessage, skip WebWorkers
          // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'
          } else if (
            global$2.addEventListener &&
            typeof postMessage == 'function' &&
            !global$2.importScripts &&
            location$1 && location$1.protocol !== 'file:' &&
            !fails(post)
          ) {
            defer = post;
            global$2.addEventListener('message', listener, false);
          // IE8-
          } else if (ONREADYSTATECHANGE in documentCreateElement('script')) {
            defer = function (id) {
              html.appendChild(documentCreateElement('script'))[ONREADYSTATECHANGE] = function () {
                html.removeChild(this);
                run(id);
              };
            };
          // Rest old browsers
          } else {
            defer = function (id) {
              setTimeout(runner(id), 0);
            };
          }
        }

        var task$1 = {
          set: set$2,
          clear: clear
        };

        var engineIsWebosWebkit = /web0s(?!.*chrome)/i.test(engineUserAgent);

        var getOwnPropertyDescriptor$3 = objectGetOwnPropertyDescriptor.f;
        var macrotask = task$1.set;




        var MutationObserver = global$2.MutationObserver || global$2.WebKitMutationObserver;
        var document$2 = global$2.document;
        var process$2 = global$2.process;
        var Promise$1 = global$2.Promise;
        // Node.js 11 shows ExperimentalWarning on getting `queueMicrotask`
        var queueMicrotaskDescriptor = getOwnPropertyDescriptor$3(global$2, 'queueMicrotask');
        var queueMicrotask = queueMicrotaskDescriptor && queueMicrotaskDescriptor.value;

        var flush, head, last, notify$1, toggle, node, promise, then;

        // modern engines have queueMicrotask method
        if (!queueMicrotask) {
          flush = function () {
            var parent, fn;
            if (engineIsNode && (parent = process$2.domain)) parent.exit();
            while (head) {
              fn = head.fn;
              head = head.next;
              try {
                fn();
              } catch (error) {
                if (head) notify$1();
                else last = undefined;
                throw error;
              }
            } last = undefined;
            if (parent) parent.enter();
          };

          // browsers with MutationObserver, except iOS - https://github.com/zloirock/core-js/issues/339
          // also except WebOS Webkit https://github.com/zloirock/core-js/issues/898
          if (!engineIsIos && !engineIsNode && !engineIsWebosWebkit && MutationObserver && document$2) {
            toggle = true;
            node = document$2.createTextNode('');
            new MutationObserver(flush).observe(node, { characterData: true });
            notify$1 = function () {
              node.data = toggle = !toggle;
            };
          // environments with maybe non-completely correct, but existent Promise
          } else if (Promise$1 && Promise$1.resolve) {
            // Promise.resolve without an argument throws an error in LG WebOS 2
            promise = Promise$1.resolve(undefined);
            // workaround of WebKit ~ iOS Safari 10.1 bug
            promise.constructor = Promise$1;
            then = promise.then;
            notify$1 = function () {
              then.call(promise, flush);
            };
          // Node.js without promises
          } else if (engineIsNode) {
            notify$1 = function () {
              process$2.nextTick(flush);
            };
          // for other environments - macrotask based on:
          // - setImmediate
          // - MessageChannel
          // - window.postMessag
          // - onreadystatechange
          // - setTimeout
          } else {
            notify$1 = function () {
              // strange IE + webpack dev server bug - use .call(global)
              macrotask.call(global$2, flush);
            };
          }
        }

        var microtask = queueMicrotask || function (fn) {
          var task = { fn: fn, next: undefined };
          if (last) last.next = task;
          if (!head) {
            head = task;
            notify$1();
          } last = task;
        };

        var PromiseCapability = function (C) {
          var resolve, reject;
          this.promise = new C(function ($$resolve, $$reject) {
            if (resolve !== undefined || reject !== undefined) throw TypeError('Bad Promise constructor');
            resolve = $$resolve;
            reject = $$reject;
          });
          this.resolve = aFunction(resolve);
          this.reject = aFunction(reject);
        };

        // `NewPromiseCapability` abstract operation
        // https://tc39.es/ecma262/#sec-newpromisecapability
        var f = function (C) {
          return new PromiseCapability(C);
        };

        var newPromiseCapability$1 = {
                f: f
        };

        var promiseResolve = function (C, x) {
          anObject(C);
          if (isObject$4(x) && x.constructor === C) return x;
          var promiseCapability = newPromiseCapability$1.f(C);
          var resolve = promiseCapability.resolve;
          resolve(x);
          return promiseCapability.promise;
        };

        var hostReportErrors = function (a, b) {
          var console = global$2.console;
          if (console && console.error) {
            arguments.length === 1 ? console.error(a) : console.error(a, b);
          }
        };

        var perform = function (exec) {
          try {
            return { error: false, value: exec() };
          } catch (error) {
            return { error: true, value: error };
          }
        };

        var engineIsBrowser = typeof window == 'object';

        var task = task$1.set;












        var SPECIES$2 = wellKnownSymbol('species');
        var PROMISE = 'Promise';
        var getInternalState$1 = internalState.get;
        var setInternalState$3 = internalState.set;
        var getInternalPromiseState = internalState.getterFor(PROMISE);
        var NativePromisePrototype = nativePromiseConstructor && nativePromiseConstructor.prototype;
        var PromiseConstructor = nativePromiseConstructor;
        var PromiseConstructorPrototype = NativePromisePrototype;
        var TypeError$1 = global$2.TypeError;
        var document$1 = global$2.document;
        var process$1 = global$2.process;
        var newPromiseCapability = newPromiseCapability$1.f;
        var newGenericPromiseCapability = newPromiseCapability;
        var DISPATCH_EVENT = !!(document$1 && document$1.createEvent && global$2.dispatchEvent);
        var NATIVE_REJECTION_EVENT = typeof PromiseRejectionEvent == 'function';
        var UNHANDLED_REJECTION = 'unhandledrejection';
        var REJECTION_HANDLED = 'rejectionhandled';
        var PENDING = 0;
        var FULFILLED = 1;
        var REJECTED = 2;
        var HANDLED = 1;
        var UNHANDLED = 2;
        var SUBCLASSING = false;
        var Internal, OwnPromiseCapability, PromiseWrapper, nativeThen;

        var FORCED$f = isForced_1(PROMISE, function () {
          var GLOBAL_CORE_JS_PROMISE = inspectSource(PromiseConstructor) !== String(PromiseConstructor);
          // V8 6.6 (Node 10 and Chrome 66) have a bug with resolving custom thenables
          // https://bugs.chromium.org/p/chromium/issues/detail?id=830565
          // We can't detect it synchronously, so just check versions
          if (!GLOBAL_CORE_JS_PROMISE && engineV8Version === 66) return true;
          // We can't use @@species feature detection in V8 since it causes
          // deoptimization and performance degradation
          // https://github.com/zloirock/core-js/issues/679
          if (engineV8Version >= 51 && /native code/.test(PromiseConstructor)) return false;
          // Detect correctness of subclassing with @@species support
          var promise = new PromiseConstructor(function (resolve) { resolve(1); });
          var FakePromise = function (exec) {
            exec(function () { /* empty */ }, function () { /* empty */ });
          };
          var constructor = promise.constructor = {};
          constructor[SPECIES$2] = FakePromise;
          SUBCLASSING = promise.then(function () { /* empty */ }) instanceof FakePromise;
          if (!SUBCLASSING) return true;
          // Unhandled rejections tracking support, NodeJS Promise without it fails @@species test
          return !GLOBAL_CORE_JS_PROMISE && engineIsBrowser && !NATIVE_REJECTION_EVENT;
        });

        var INCORRECT_ITERATION$1 = FORCED$f || !checkCorrectnessOfIteration(function (iterable) {
          PromiseConstructor.all(iterable)['catch'](function () { /* empty */ });
        });

        // helpers
        var isThenable = function (it) {
          var then;
          return isObject$4(it) && typeof (then = it.then) == 'function' ? then : false;
        };

        var notify = function (state, isReject) {
          if (state.notified) return;
          state.notified = true;
          var chain = state.reactions;
          microtask(function () {
            var value = state.value;
            var ok = state.state == FULFILLED;
            var index = 0;
            // variable length - can't use forEach
            while (chain.length > index) {
              var reaction = chain[index++];
              var handler = ok ? reaction.ok : reaction.fail;
              var resolve = reaction.resolve;
              var reject = reaction.reject;
              var domain = reaction.domain;
              var result, then, exited;
              try {
                if (handler) {
                  if (!ok) {
                    if (state.rejection === UNHANDLED) onHandleUnhandled(state);
                    state.rejection = HANDLED;
                  }
                  if (handler === true) result = value;
                  else {
                    if (domain) domain.enter();
                    result = handler(value); // can throw
                    if (domain) {
                      domain.exit();
                      exited = true;
                    }
                  }
                  if (result === reaction.promise) {
                    reject(TypeError$1('Promise-chain cycle'));
                  } else if (then = isThenable(result)) {
                    then.call(result, resolve, reject);
                  } else resolve(result);
                } else reject(value);
              } catch (error) {
                if (domain && !exited) domain.exit();
                reject(error);
              }
            }
            state.reactions = [];
            state.notified = false;
            if (isReject && !state.rejection) onUnhandled(state);
          });
        };

        var dispatchEvent$1 = function (name, promise, reason) {
          var event, handler;
          if (DISPATCH_EVENT) {
            event = document$1.createEvent('Event');
            event.promise = promise;
            event.reason = reason;
            event.initEvent(name, false, true);
            global$2.dispatchEvent(event);
          } else event = { promise: promise, reason: reason };
          if (!NATIVE_REJECTION_EVENT && (handler = global$2['on' + name])) handler(event);
          else if (name === UNHANDLED_REJECTION) hostReportErrors('Unhandled promise rejection', reason);
        };

        var onUnhandled = function (state) {
          task.call(global$2, function () {
            var promise = state.facade;
            var value = state.value;
            var IS_UNHANDLED = isUnhandled(state);
            var result;
            if (IS_UNHANDLED) {
              result = perform(function () {
                if (engineIsNode) {
                  process$1.emit('unhandledRejection', value, promise);
                } else dispatchEvent$1(UNHANDLED_REJECTION, promise, value);
              });
              // Browsers should not trigger `rejectionHandled` event if it was handled here, NodeJS - should
              state.rejection = engineIsNode || isUnhandled(state) ? UNHANDLED : HANDLED;
              if (result.error) throw result.value;
            }
          });
        };

        var isUnhandled = function (state) {
          return state.rejection !== HANDLED && !state.parent;
        };

        var onHandleUnhandled = function (state) {
          task.call(global$2, function () {
            var promise = state.facade;
            if (engineIsNode) {
              process$1.emit('rejectionHandled', promise);
            } else dispatchEvent$1(REJECTION_HANDLED, promise, state.value);
          });
        };

        var bind$2 = function (fn, state, unwrap) {
          return function (value) {
            fn(state, value, unwrap);
          };
        };

        var internalReject = function (state, value, unwrap) {
          if (state.done) return;
          state.done = true;
          if (unwrap) state = unwrap;
          state.value = value;
          state.state = REJECTED;
          notify(state, true);
        };

        var internalResolve = function (state, value, unwrap) {
          if (state.done) return;
          state.done = true;
          if (unwrap) state = unwrap;
          try {
            if (state.facade === value) throw TypeError$1("Promise can't be resolved itself");
            var then = isThenable(value);
            if (then) {
              microtask(function () {
                var wrapper = { done: false };
                try {
                  then.call(value,
                    bind$2(internalResolve, wrapper, state),
                    bind$2(internalReject, wrapper, state)
                  );
                } catch (error) {
                  internalReject(wrapper, error, state);
                }
              });
            } else {
              state.value = value;
              state.state = FULFILLED;
              notify(state, false);
            }
          } catch (error) {
            internalReject({ done: false }, error, state);
          }
        };

        // constructor polyfill
        if (FORCED$f) {
          // 25.4.3.1 Promise(executor)
          PromiseConstructor = function Promise(executor) {
            anInstance(this, PromiseConstructor, PROMISE);
            aFunction(executor);
            Internal.call(this);
            var state = getInternalState$1(this);
            try {
              executor(bind$2(internalResolve, state), bind$2(internalReject, state));
            } catch (error) {
              internalReject(state, error);
            }
          };
          PromiseConstructorPrototype = PromiseConstructor.prototype;
          // eslint-disable-next-line no-unused-vars -- required for `.length`
          Internal = function Promise(executor) {
            setInternalState$3(this, {
              type: PROMISE,
              done: false,
              notified: false,
              parent: false,
              reactions: [],
              rejection: false,
              state: PENDING,
              value: undefined
            });
          };
          Internal.prototype = redefineAll(PromiseConstructorPrototype, {
            // `Promise.prototype.then` method
            // https://tc39.es/ecma262/#sec-promise.prototype.then
            then: function then(onFulfilled, onRejected) {
              var state = getInternalPromiseState(this);
              var reaction = newPromiseCapability(speciesConstructor(this, PromiseConstructor));
              reaction.ok = typeof onFulfilled == 'function' ? onFulfilled : true;
              reaction.fail = typeof onRejected == 'function' && onRejected;
              reaction.domain = engineIsNode ? process$1.domain : undefined;
              state.parent = true;
              state.reactions.push(reaction);
              if (state.state != PENDING) notify(state, false);
              return reaction.promise;
            },
            // `Promise.prototype.catch` method
            // https://tc39.es/ecma262/#sec-promise.prototype.catch
            'catch': function (onRejected) {
              return this.then(undefined, onRejected);
            }
          });
          OwnPromiseCapability = function () {
            var promise = new Internal();
            var state = getInternalState$1(promise);
            this.promise = promise;
            this.resolve = bind$2(internalResolve, state);
            this.reject = bind$2(internalReject, state);
          };
          newPromiseCapability$1.f = newPromiseCapability = function (C) {
            return C === PromiseConstructor || C === PromiseWrapper
              ? new OwnPromiseCapability(C)
              : newGenericPromiseCapability(C);
          };

          if (typeof nativePromiseConstructor == 'function' && NativePromisePrototype !== Object.prototype) {
            nativeThen = NativePromisePrototype.then;

            if (!SUBCLASSING) {
              // make `Promise#then` return a polyfilled `Promise` for native promise-based APIs
              redefine(NativePromisePrototype, 'then', function then(onFulfilled, onRejected) {
                var that = this;
                return new PromiseConstructor(function (resolve, reject) {
                  nativeThen.call(that, resolve, reject);
                }).then(onFulfilled, onRejected);
              // https://github.com/zloirock/core-js/issues/640
              }, { unsafe: true });

              // makes sure that native promise-based APIs `Promise#catch` properly works with patched `Promise#then`
              redefine(NativePromisePrototype, 'catch', PromiseConstructorPrototype['catch'], { unsafe: true });
            }

            // make `.constructor === Promise` work for native promise-based APIs
            try {
              delete NativePromisePrototype.constructor;
            } catch (error) { /* empty */ }

            // make `instanceof Promise` work for native promise-based APIs
            if (objectSetPrototypeOf) {
              objectSetPrototypeOf(NativePromisePrototype, PromiseConstructorPrototype);
            }
          }
        }

        _export({ global: true, wrap: true, forced: FORCED$f }, {
          Promise: PromiseConstructor
        });

        setToStringTag(PromiseConstructor, PROMISE, false);
        setSpecies(PROMISE);

        PromiseWrapper = getBuiltIn(PROMISE);

        // statics
        _export({ target: PROMISE, stat: true, forced: FORCED$f }, {
          // `Promise.reject` method
          // https://tc39.es/ecma262/#sec-promise.reject
          reject: function reject(r) {
            var capability = newPromiseCapability(this);
            capability.reject.call(undefined, r);
            return capability.promise;
          }
        });

        _export({ target: PROMISE, stat: true, forced: FORCED$f }, {
          // `Promise.resolve` method
          // https://tc39.es/ecma262/#sec-promise.resolve
          resolve: function resolve(x) {
            return promiseResolve(this, x);
          }
        });

        _export({ target: PROMISE, stat: true, forced: INCORRECT_ITERATION$1 }, {
          // `Promise.all` method
          // https://tc39.es/ecma262/#sec-promise.all
          all: function all(iterable) {
            var C = this;
            var capability = newPromiseCapability(C);
            var resolve = capability.resolve;
            var reject = capability.reject;
            var result = perform(function () {
              var $promiseResolve = aFunction(C.resolve);
              var values = [];
              var counter = 0;
              var remaining = 1;
              iterate(iterable, function (promise) {
                var index = counter++;
                var alreadyCalled = false;
                values.push(undefined);
                remaining++;
                $promiseResolve.call(C, promise).then(function (value) {
                  if (alreadyCalled) return;
                  alreadyCalled = true;
                  values[index] = value;
                  --remaining || resolve(values);
                }, reject);
              });
              --remaining || resolve(values);
            });
            if (result.error) reject(result.value);
            return capability.promise;
          },
          // `Promise.race` method
          // https://tc39.es/ecma262/#sec-promise.race
          race: function race(iterable) {
            var C = this;
            var capability = newPromiseCapability(C);
            var reject = capability.reject;
            var result = perform(function () {
              var $promiseResolve = aFunction(C.resolve);
              iterate(iterable, function (promise) {
                $promiseResolve.call(C, promise).then(capability.resolve, reject);
              });
            });
            if (result.error) reject(result.value);
            return capability.promise;
          }
        });

        /* eslint-disable no-new -- required for testing */

        var NATIVE_ARRAY_BUFFER_VIEWS = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;

        var ArrayBuffer$1 = global$2.ArrayBuffer;
        var Int8Array$2 = global$2.Int8Array;

        var typedArrayConstructorsRequireWrappers = !NATIVE_ARRAY_BUFFER_VIEWS || !fails(function () {
          Int8Array$2(1);
        }) || !fails(function () {
          new Int8Array$2(-1);
        }) || !checkCorrectnessOfIteration(function (iterable) {
          new Int8Array$2();
          new Int8Array$2(null);
          new Int8Array$2(1.5);
          new Int8Array$2(iterable);
        }, true) || fails(function () {
          // Safari (11+) bug - a reason why even Safari 13 should load a typed array polyfill
          return new Int8Array$2(new ArrayBuffer$1(2), 1, undefined).length !== 1;
        });

        var toPositiveInteger = function (it) {
          var result = toInteger(it);
          if (result < 0) throw RangeError("The argument can't be less than 0");
          return result;
        };

        var toOffset = function (it, BYTES) {
          var offset = toPositiveInteger(it);
          if (offset % BYTES) throw RangeError('Wrong offset');
          return offset;
        };

        var aTypedArrayConstructor$3 = arrayBufferViewCore.aTypedArrayConstructor;

        var typedArrayFrom = function from(source /* , mapfn, thisArg */) {
          var O = toObject(source);
          var argumentsLength = arguments.length;
          var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
          var mapping = mapfn !== undefined;
          var iteratorMethod = getIteratorMethod(O);
          var i, length, result, step, iterator, next;
          if (iteratorMethod != undefined && !isArrayIteratorMethod(iteratorMethod)) {
            iterator = iteratorMethod.call(O);
            next = iterator.next;
            O = [];
            while (!(step = next.call(iterator)).done) {
              O.push(step.value);
            }
          }
          if (mapping && argumentsLength > 2) {
            mapfn = functionBindContext(mapfn, arguments[2], 2);
          }
          length = toLength(O.length);
          result = new (aTypedArrayConstructor$3(this))(length);
          for (i = 0; length > i; i++) {
            result[i] = mapping ? mapfn(O[i], i) : O[i];
          }
          return result;
        };

        // makes subclassing work correct for wrapped built-ins
        var inheritIfRequired = function ($this, dummy, Wrapper) {
          var NewTarget, NewTargetPrototype;
          if (
            // it can work only with native `setPrototypeOf`
            objectSetPrototypeOf &&
            // we haven't completely correct pre-ES6 way for getting `new.target`, so use this
            typeof (NewTarget = dummy.constructor) == 'function' &&
            NewTarget !== Wrapper &&
            isObject$4(NewTargetPrototype = NewTarget.prototype) &&
            NewTargetPrototype !== Wrapper.prototype
          ) objectSetPrototypeOf($this, NewTargetPrototype);
          return $this;
        };

        var typedArrayConstructor = createCommonjsModule(function (module) {


















        var getOwnPropertyNames = objectGetOwnPropertyNames.f;

        var forEach = arrayIteration.forEach;






        var getInternalState = internalState.get;
        var setInternalState = internalState.set;
        var nativeDefineProperty = objectDefineProperty.f;
        var nativeGetOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
        var round = Math.round;
        var RangeError = global$2.RangeError;
        var ArrayBuffer = arrayBuffer.ArrayBuffer;
        var DataView = arrayBuffer.DataView;
        var NATIVE_ARRAY_BUFFER_VIEWS = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
        var TYPED_ARRAY_TAG = arrayBufferViewCore.TYPED_ARRAY_TAG;
        var TypedArray = arrayBufferViewCore.TypedArray;
        var TypedArrayPrototype = arrayBufferViewCore.TypedArrayPrototype;
        var aTypedArrayConstructor = arrayBufferViewCore.aTypedArrayConstructor;
        var isTypedArray = arrayBufferViewCore.isTypedArray;
        var BYTES_PER_ELEMENT = 'BYTES_PER_ELEMENT';
        var WRONG_LENGTH = 'Wrong length';

        var fromList = function (C, list) {
          var index = 0;
          var length = list.length;
          var result = new (aTypedArrayConstructor(C))(length);
          while (length > index) result[index] = list[index++];
          return result;
        };

        var addGetter = function (it, key) {
          nativeDefineProperty(it, key, { get: function () {
            return getInternalState(this)[key];
          } });
        };

        var isArrayBuffer = function (it) {
          var klass;
          return it instanceof ArrayBuffer || (klass = classof(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
        };

        var isTypedArrayIndex = function (target, key) {
          return isTypedArray(target)
            && typeof key != 'symbol'
            && key in target
            && String(+key) == String(key);
        };

        var wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {
          return isTypedArrayIndex(target, key = toPrimitive(key, true))
            ? createPropertyDescriptor(2, target[key])
            : nativeGetOwnPropertyDescriptor(target, key);
        };

        var wrappedDefineProperty = function defineProperty(target, key, descriptor) {
          if (isTypedArrayIndex(target, key = toPrimitive(key, true))
            && isObject$4(descriptor)
            && has$1(descriptor, 'value')
            && !has$1(descriptor, 'get')
            && !has$1(descriptor, 'set')
            // TODO: add validation descriptor w/o calling accessors
            && !descriptor.configurable
            && (!has$1(descriptor, 'writable') || descriptor.writable)
            && (!has$1(descriptor, 'enumerable') || descriptor.enumerable)
          ) {
            target[key] = descriptor.value;
            return target;
          } return nativeDefineProperty(target, key, descriptor);
        };

        if (descriptors) {
          if (!NATIVE_ARRAY_BUFFER_VIEWS) {
            objectGetOwnPropertyDescriptor.f = wrappedGetOwnPropertyDescriptor;
            objectDefineProperty.f = wrappedDefineProperty;
            addGetter(TypedArrayPrototype, 'buffer');
            addGetter(TypedArrayPrototype, 'byteOffset');
            addGetter(TypedArrayPrototype, 'byteLength');
            addGetter(TypedArrayPrototype, 'length');
          }

          _export({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
            getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,
            defineProperty: wrappedDefineProperty
          });

          module.exports = function (TYPE, wrapper, CLAMPED) {
            var BYTES = TYPE.match(/\d+$/)[0] / 8;
            var CONSTRUCTOR_NAME = TYPE + (CLAMPED ? 'Clamped' : '') + 'Array';
            var GETTER = 'get' + TYPE;
            var SETTER = 'set' + TYPE;
            var NativeTypedArrayConstructor = global$2[CONSTRUCTOR_NAME];
            var TypedArrayConstructor = NativeTypedArrayConstructor;
            var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;
            var exported = {};

            var getter = function (that, index) {
              var data = getInternalState(that);
              return data.view[GETTER](index * BYTES + data.byteOffset, true);
            };

            var setter = function (that, index, value) {
              var data = getInternalState(that);
              if (CLAMPED) value = (value = round(value)) < 0 ? 0 : value > 0xFF ? 0xFF : value & 0xFF;
              data.view[SETTER](index * BYTES + data.byteOffset, value, true);
            };

            var addElement = function (that, index) {
              nativeDefineProperty(that, index, {
                get: function () {
                  return getter(this, index);
                },
                set: function (value) {
                  return setter(this, index, value);
                },
                enumerable: true
              });
            };

            if (!NATIVE_ARRAY_BUFFER_VIEWS) {
              TypedArrayConstructor = wrapper(function (that, data, offset, $length) {
                anInstance(that, TypedArrayConstructor, CONSTRUCTOR_NAME);
                var index = 0;
                var byteOffset = 0;
                var buffer, byteLength, length;
                if (!isObject$4(data)) {
                  length = toIndex(data);
                  byteLength = length * BYTES;
                  buffer = new ArrayBuffer(byteLength);
                } else if (isArrayBuffer(data)) {
                  buffer = data;
                  byteOffset = toOffset(offset, BYTES);
                  var $len = data.byteLength;
                  if ($length === undefined) {
                    if ($len % BYTES) throw RangeError(WRONG_LENGTH);
                    byteLength = $len - byteOffset;
                    if (byteLength < 0) throw RangeError(WRONG_LENGTH);
                  } else {
                    byteLength = toLength($length) * BYTES;
                    if (byteLength + byteOffset > $len) throw RangeError(WRONG_LENGTH);
                  }
                  length = byteLength / BYTES;
                } else if (isTypedArray(data)) {
                  return fromList(TypedArrayConstructor, data);
                } else {
                  return typedArrayFrom.call(TypedArrayConstructor, data);
                }
                setInternalState(that, {
                  buffer: buffer,
                  byteOffset: byteOffset,
                  byteLength: byteLength,
                  length: length,
                  view: new DataView(buffer)
                });
                while (index < length) addElement(that, index++);
              });

              if (objectSetPrototypeOf) objectSetPrototypeOf(TypedArrayConstructor, TypedArray);
              TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = objectCreate(TypedArrayPrototype);
            } else if (typedArrayConstructorsRequireWrappers) {
              TypedArrayConstructor = wrapper(function (dummy, data, typedArrayOffset, $length) {
                anInstance(dummy, TypedArrayConstructor, CONSTRUCTOR_NAME);
                return inheritIfRequired(function () {
                  if (!isObject$4(data)) return new NativeTypedArrayConstructor(toIndex(data));
                  if (isArrayBuffer(data)) return $length !== undefined
                    ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES), $length)
                    : typedArrayOffset !== undefined
                      ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES))
                      : new NativeTypedArrayConstructor(data);
                  if (isTypedArray(data)) return fromList(TypedArrayConstructor, data);
                  return typedArrayFrom.call(TypedArrayConstructor, data);
                }(), dummy, TypedArrayConstructor);
              });

              if (objectSetPrototypeOf) objectSetPrototypeOf(TypedArrayConstructor, TypedArray);
              forEach(getOwnPropertyNames(NativeTypedArrayConstructor), function (key) {
                if (!(key in TypedArrayConstructor)) {
                  createNonEnumerableProperty(TypedArrayConstructor, key, NativeTypedArrayConstructor[key]);
                }
              });
              TypedArrayConstructor.prototype = TypedArrayConstructorPrototype;
            }

            if (TypedArrayConstructorPrototype.constructor !== TypedArrayConstructor) {
              createNonEnumerableProperty(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);
            }

            if (TYPED_ARRAY_TAG) {
              createNonEnumerableProperty(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);
            }

            exported[CONSTRUCTOR_NAME] = TypedArrayConstructor;

            _export({
              global: true, forced: TypedArrayConstructor != NativeTypedArrayConstructor, sham: !NATIVE_ARRAY_BUFFER_VIEWS
            }, exported);

            if (!(BYTES_PER_ELEMENT in TypedArrayConstructor)) {
              createNonEnumerableProperty(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);
            }

            if (!(BYTES_PER_ELEMENT in TypedArrayConstructorPrototype)) {
              createNonEnumerableProperty(TypedArrayConstructorPrototype, BYTES_PER_ELEMENT, BYTES);
            }

            setSpecies(CONSTRUCTOR_NAME);
          };
        } else module.exports = function () { /* empty */ };
        });

        // `Uint8Array` constructor
        // https://tc39.es/ecma262/#sec-typedarray-objects
        typedArrayConstructor('Uint8', function (init) {
          return function Uint8Array(data, byteOffset, length) {
            return init(this, data, byteOffset, length);
          };
        });

        var min$7 = Math.min;

        // `Array.prototype.copyWithin` method implementation
        // https://tc39.es/ecma262/#sec-array.prototype.copywithin
        // eslint-disable-next-line es/no-array-prototype-copywithin -- safe
        var arrayCopyWithin = [].copyWithin || function copyWithin(target /* = 0 */, start /* = 0, end = @length */) {
          var O = toObject(this);
          var len = toLength(O.length);
          var to = toAbsoluteIndex(target, len);
          var from = toAbsoluteIndex(start, len);
          var end = arguments.length > 2 ? arguments[2] : undefined;
          var count = min$7((end === undefined ? len : toAbsoluteIndex(end, len)) - from, len - to);
          var inc = 1;
          if (from < to && to < from + count) {
            inc = -1;
            from += count - 1;
            to += count - 1;
          }
          while (count-- > 0) {
            if (from in O) O[to] = O[from];
            else delete O[to];
            to += inc;
            from += inc;
          } return O;
        };

        var aTypedArray$l = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$m = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.copyWithin` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.copywithin
        exportTypedArrayMethod$m('copyWithin', function copyWithin(target, start /* , end */) {
          return arrayCopyWithin.call(aTypedArray$l(this), target, start, arguments.length > 2 ? arguments[2] : undefined);
        });

        var $every$1 = arrayIteration.every;

        var aTypedArray$k = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$l = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.every` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.every
        exportTypedArrayMethod$l('every', function every(callbackfn /* , thisArg */) {
          return $every$1(aTypedArray$k(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
        });

        var aTypedArray$j = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$k = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.fill` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.fill
        // eslint-disable-next-line no-unused-vars -- required for `.length`
        exportTypedArrayMethod$k('fill', function fill(value /* , start, end */) {
          return arrayFill.apply(aTypedArray$j(this), arguments);
        });

        var aTypedArrayConstructor$2 = arrayBufferViewCore.aTypedArrayConstructor;


        var typedArrayFromSpeciesAndList = function (instance, list) {
          var C = speciesConstructor(instance, instance.constructor);
          var index = 0;
          var length = list.length;
          var result = new (aTypedArrayConstructor$2(C))(length);
          while (length > index) result[index] = list[index++];
          return result;
        };

        var $filter$1 = arrayIteration.filter;


        var aTypedArray$i = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$j = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.filter` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.filter
        exportTypedArrayMethod$j('filter', function filter(callbackfn /* , thisArg */) {
          var list = $filter$1(aTypedArray$i(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          return typedArrayFromSpeciesAndList(this, list);
        });

        var $find$1 = arrayIteration.find;

        var aTypedArray$h = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$i = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.find` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.find
        exportTypedArrayMethod$i('find', function find(predicate /* , thisArg */) {
          return $find$1(aTypedArray$h(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
        });

        var $findIndex$1 = arrayIteration.findIndex;

        var aTypedArray$g = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$h = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.findIndex` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.findindex
        exportTypedArrayMethod$h('findIndex', function findIndex(predicate /* , thisArg */) {
          return $findIndex$1(aTypedArray$g(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
        });

        var $forEach = arrayIteration.forEach;

        var aTypedArray$f = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$g = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.forEach` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.foreach
        exportTypedArrayMethod$g('forEach', function forEach(callbackfn /* , thisArg */) {
          $forEach(aTypedArray$f(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
        });

        var $includes$1 = arrayIncludes.includes;

        var aTypedArray$e = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$f = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.includes` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.includes
        exportTypedArrayMethod$f('includes', function includes(searchElement /* , fromIndex */) {
          return $includes$1(aTypedArray$e(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
        });

        var $indexOf = arrayIncludes.indexOf;

        var aTypedArray$d = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$e = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.indexOf` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.indexof
        exportTypedArrayMethod$e('indexOf', function indexOf(searchElement /* , fromIndex */) {
          return $indexOf(aTypedArray$d(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
        });

        var ITERATOR$2 = wellKnownSymbol('iterator');
        var Uint8Array$2 = global$2.Uint8Array;
        var arrayValues = es_array_iterator.values;
        var arrayKeys = es_array_iterator.keys;
        var arrayEntries = es_array_iterator.entries;
        var aTypedArray$c = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$d = arrayBufferViewCore.exportTypedArrayMethod;
        var nativeTypedArrayIterator = Uint8Array$2 && Uint8Array$2.prototype[ITERATOR$2];

        var CORRECT_ITER_NAME = !!nativeTypedArrayIterator
          && (nativeTypedArrayIterator.name == 'values' || nativeTypedArrayIterator.name == undefined);

        var typedArrayValues = function values() {
          return arrayValues.call(aTypedArray$c(this));
        };

        // `%TypedArray%.prototype.entries` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.entries
        exportTypedArrayMethod$d('entries', function entries() {
          return arrayEntries.call(aTypedArray$c(this));
        });
        // `%TypedArray%.prototype.keys` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.keys
        exportTypedArrayMethod$d('keys', function keys() {
          return arrayKeys.call(aTypedArray$c(this));
        });
        // `%TypedArray%.prototype.values` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.values
        exportTypedArrayMethod$d('values', typedArrayValues, !CORRECT_ITER_NAME);
        // `%TypedArray%.prototype[@@iterator]` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype-@@iterator
        exportTypedArrayMethod$d(ITERATOR$2, typedArrayValues, !CORRECT_ITER_NAME);

        var aTypedArray$b = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$c = arrayBufferViewCore.exportTypedArrayMethod;
        var $join = [].join;

        // `%TypedArray%.prototype.join` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.join
        // eslint-disable-next-line no-unused-vars -- required for `.length`
        exportTypedArrayMethod$c('join', function join(separator) {
          return $join.apply(aTypedArray$b(this), arguments);
        });

        /* eslint-disable es/no-array-prototype-lastindexof -- safe */





        var min$6 = Math.min;
        var $lastIndexOf = [].lastIndexOf;
        var NEGATIVE_ZERO = !!$lastIndexOf && 1 / [1].lastIndexOf(1, -0) < 0;
        var STRICT_METHOD$5 = arrayMethodIsStrict('lastIndexOf');
        var FORCED$e = NEGATIVE_ZERO || !STRICT_METHOD$5;

        // `Array.prototype.lastIndexOf` method implementation
        // https://tc39.es/ecma262/#sec-array.prototype.lastindexof
        var arrayLastIndexOf = FORCED$e ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {
          // convert -0 to +0
          if (NEGATIVE_ZERO) return $lastIndexOf.apply(this, arguments) || 0;
          var O = toIndexedObject(this);
          var length = toLength(O.length);
          var index = length - 1;
          if (arguments.length > 1) index = min$6(index, toInteger(arguments[1]));
          if (index < 0) index = length + index;
          for (;index >= 0; index--) if (index in O && O[index] === searchElement) return index || 0;
          return -1;
        } : $lastIndexOf;

        var aTypedArray$a = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$b = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.lastIndexOf` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.lastindexof
        // eslint-disable-next-line no-unused-vars -- required for `.length`
        exportTypedArrayMethod$b('lastIndexOf', function lastIndexOf(searchElement /* , fromIndex */) {
          return arrayLastIndexOf.apply(aTypedArray$a(this), arguments);
        });

        var $map = arrayIteration.map;


        var aTypedArray$9 = arrayBufferViewCore.aTypedArray;
        var aTypedArrayConstructor$1 = arrayBufferViewCore.aTypedArrayConstructor;
        var exportTypedArrayMethod$a = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.map` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.map
        exportTypedArrayMethod$a('map', function map(mapfn /* , thisArg */) {
          return $map(aTypedArray$9(this), mapfn, arguments.length > 1 ? arguments[1] : undefined, function (O, length) {
            return new (aTypedArrayConstructor$1(speciesConstructor(O, O.constructor)))(length);
          });
        });

        // `Array.prototype.{ reduce, reduceRight }` methods implementation
        var createMethod$3 = function (IS_RIGHT) {
          return function (that, callbackfn, argumentsLength, memo) {
            aFunction(callbackfn);
            var O = toObject(that);
            var self = indexedObject(O);
            var length = toLength(O.length);
            var index = IS_RIGHT ? length - 1 : 0;
            var i = IS_RIGHT ? -1 : 1;
            if (argumentsLength < 2) while (true) {
              if (index in self) {
                memo = self[index];
                index += i;
                break;
              }
              index += i;
              if (IS_RIGHT ? index < 0 : length <= index) {
                throw TypeError('Reduce of empty array with no initial value');
              }
            }
            for (;IS_RIGHT ? index >= 0 : length > index; index += i) if (index in self) {
              memo = callbackfn(memo, self[index], index, O);
            }
            return memo;
          };
        };

        var arrayReduce = {
          // `Array.prototype.reduce` method
          // https://tc39.es/ecma262/#sec-array.prototype.reduce
          left: createMethod$3(false),
          // `Array.prototype.reduceRight` method
          // https://tc39.es/ecma262/#sec-array.prototype.reduceright
          right: createMethod$3(true)
        };

        var $reduce$1 = arrayReduce.left;

        var aTypedArray$8 = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$9 = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.reduce` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduce
        exportTypedArrayMethod$9('reduce', function reduce(callbackfn /* , initialValue */) {
          return $reduce$1(aTypedArray$8(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
        });

        var $reduceRight = arrayReduce.right;

        var aTypedArray$7 = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$8 = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.reduceRicht` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduceright
        exportTypedArrayMethod$8('reduceRight', function reduceRight(callbackfn /* , initialValue */) {
          return $reduceRight(aTypedArray$7(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
        });

        var aTypedArray$6 = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$7 = arrayBufferViewCore.exportTypedArrayMethod;
        var floor$5 = Math.floor;

        // `%TypedArray%.prototype.reverse` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.reverse
        exportTypedArrayMethod$7('reverse', function reverse() {
          var that = this;
          var length = aTypedArray$6(that).length;
          var middle = floor$5(length / 2);
          var index = 0;
          var value;
          while (index < middle) {
            value = that[index];
            that[index++] = that[--length];
            that[length] = value;
          } return that;
        });

        var aTypedArray$5 = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$6 = arrayBufferViewCore.exportTypedArrayMethod;

        var FORCED$d = fails(function () {
          // eslint-disable-next-line es/no-typed-arrays -- required for testing
          new Int8Array(1).set({});
        });

        // `%TypedArray%.prototype.set` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.set
        exportTypedArrayMethod$6('set', function set(arrayLike /* , offset */) {
          aTypedArray$5(this);
          var offset = toOffset(arguments.length > 1 ? arguments[1] : undefined, 1);
          var length = this.length;
          var src = toObject(arrayLike);
          var len = toLength(src.length);
          var index = 0;
          if (len + offset > length) throw RangeError('Wrong length');
          while (index < len) this[offset + index] = src[index++];
        }, FORCED$d);

        var aTypedArray$4 = arrayBufferViewCore.aTypedArray;
        var aTypedArrayConstructor = arrayBufferViewCore.aTypedArrayConstructor;
        var exportTypedArrayMethod$5 = arrayBufferViewCore.exportTypedArrayMethod;
        var $slice$1 = [].slice;

        var FORCED$c = fails(function () {
          // eslint-disable-next-line es/no-typed-arrays -- required for testing
          new Int8Array(1).slice();
        });

        // `%TypedArray%.prototype.slice` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.slice
        exportTypedArrayMethod$5('slice', function slice(start, end) {
          var list = $slice$1.call(aTypedArray$4(this), start, end);
          var C = speciesConstructor(this, this.constructor);
          var index = 0;
          var length = list.length;
          var result = new (aTypedArrayConstructor(C))(length);
          while (length > index) result[index] = list[index++];
          return result;
        }, FORCED$c);

        var $some$1 = arrayIteration.some;

        var aTypedArray$3 = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$4 = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.some` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.some
        exportTypedArrayMethod$4('some', function some(callbackfn /* , thisArg */) {
          return $some$1(aTypedArray$3(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
        });

        // TODO: use something more complex like timsort?
        var floor$4 = Math.floor;

        var mergeSort = function (array, comparefn) {
          var length = array.length;
          var middle = floor$4(length / 2);
          return length < 8 ? insertionSort(array, comparefn) : merge$5(
            mergeSort(array.slice(0, middle), comparefn),
            mergeSort(array.slice(middle), comparefn),
            comparefn
          );
        };

        var insertionSort = function (array, comparefn) {
          var length = array.length;
          var i = 1;
          var element, j;

          while (i < length) {
            j = i;
            element = array[i];
            while (j && comparefn(array[j - 1], element) > 0) {
              array[j] = array[--j];
            }
            if (j !== i++) array[j] = element;
          } return array;
        };

        var merge$5 = function (left, right, comparefn) {
          var llength = left.length;
          var rlength = right.length;
          var lindex = 0;
          var rindex = 0;
          var result = [];

          while (lindex < llength || rindex < rlength) {
            if (lindex < llength && rindex < rlength) {
              result.push(comparefn(left[lindex], right[rindex]) <= 0 ? left[lindex++] : right[rindex++]);
            } else {
              result.push(lindex < llength ? left[lindex++] : right[rindex++]);
            }
          } return result;
        };

        var arraySort = mergeSort;

        var firefox = engineUserAgent.match(/firefox\/(\d+)/i);

        var engineFfVersion = !!firefox && +firefox[1];

        var engineIsIeOrEdge = /MSIE|Trident/.test(engineUserAgent);

        var webkit = engineUserAgent.match(/AppleWebKit\/(\d+)\./);

        var engineWebkitVersion = !!webkit && +webkit[1];

        var aTypedArray$2 = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$3 = arrayBufferViewCore.exportTypedArrayMethod;
        var Uint16Array = global$2.Uint16Array;
        var nativeSort$1 = Uint16Array && Uint16Array.prototype.sort;

        // WebKit
        var ACCEPT_INCORRECT_ARGUMENTS = !!nativeSort$1 && !fails(function () {
          var array = new Uint16Array(2);
          array.sort(null);
          array.sort({});
        });

        var STABLE_SORT$1 = !!nativeSort$1 && !fails(function () {
          // feature detection can be too slow, so check engines versions
          if (engineV8Version) return engineV8Version < 74;
          if (engineFfVersion) return engineFfVersion < 67;
          if (engineIsIeOrEdge) return true;
          if (engineWebkitVersion) return engineWebkitVersion < 602;

          var array = new Uint16Array(516);
          var expected = Array(516);
          var index, mod;

          for (index = 0; index < 516; index++) {
            mod = index % 4;
            array[index] = 515 - index;
            expected[index] = index - 2 * mod + 3;
          }

          array.sort(function (a, b) {
            return (a / 4 | 0) - (b / 4 | 0);
          });

          for (index = 0; index < 516; index++) {
            if (array[index] !== expected[index]) return true;
          }
        });

        var getSortCompare$1 = function (comparefn) {
          return function (x, y) {
            if (comparefn !== undefined) return +comparefn(x, y) || 0;
            // eslint-disable-next-line no-self-compare -- NaN check
            if (y !== y) return -1;
            // eslint-disable-next-line no-self-compare -- NaN check
            if (x !== x) return 1;
            if (x === 0 && y === 0) return 1 / x > 0 && 1 / y < 0 ? 1 : -1;
            return x > y;
          };
        };

        // `%TypedArray%.prototype.sort` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.sort
        exportTypedArrayMethod$3('sort', function sort(comparefn) {
          var array = this;
          if (comparefn !== undefined) aFunction(comparefn);
          if (STABLE_SORT$1) return nativeSort$1.call(array, comparefn);

          aTypedArray$2(array);
          var arrayLength = toLength(array.length);
          var items = Array(arrayLength);
          var index;

          for (index = 0; index < arrayLength; index++) {
            items[index] = array[index];
          }

          items = arraySort(array, getSortCompare$1(comparefn));

          for (index = 0; index < arrayLength; index++) {
            array[index] = items[index];
          }

          return array;
        }, !STABLE_SORT$1 || ACCEPT_INCORRECT_ARGUMENTS);

        var aTypedArray$1 = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$2 = arrayBufferViewCore.exportTypedArrayMethod;

        // `%TypedArray%.prototype.subarray` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.subarray
        exportTypedArrayMethod$2('subarray', function subarray(begin, end) {
          var O = aTypedArray$1(this);
          var length = O.length;
          var beginIndex = toAbsoluteIndex(begin, length);
          return new (speciesConstructor(O, O.constructor))(
            O.buffer,
            O.byteOffset + beginIndex * O.BYTES_PER_ELEMENT,
            toLength((end === undefined ? length : toAbsoluteIndex(end, length)) - beginIndex)
          );
        });

        var Int8Array$1 = global$2.Int8Array;
        var aTypedArray = arrayBufferViewCore.aTypedArray;
        var exportTypedArrayMethod$1 = arrayBufferViewCore.exportTypedArrayMethod;
        var $toLocaleString = [].toLocaleString;
        var $slice = [].slice;

        // iOS Safari 6.x fails here
        var TO_LOCALE_STRING_BUG = !!Int8Array$1 && fails(function () {
          $toLocaleString.call(new Int8Array$1(1));
        });

        var FORCED$b = fails(function () {
          return [1, 2].toLocaleString() != new Int8Array$1([1, 2]).toLocaleString();
        }) || !fails(function () {
          Int8Array$1.prototype.toLocaleString.call([1, 2]);
        });

        // `%TypedArray%.prototype.toLocaleString` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.tolocalestring
        exportTypedArrayMethod$1('toLocaleString', function toLocaleString() {
          return $toLocaleString.apply(TO_LOCALE_STRING_BUG ? $slice.call(aTypedArray(this)) : aTypedArray(this), arguments);
        }, FORCED$b);

        var exportTypedArrayMethod = arrayBufferViewCore.exportTypedArrayMethod;



        var Uint8Array$1 = global$2.Uint8Array;
        var Uint8ArrayPrototype = Uint8Array$1 && Uint8Array$1.prototype || {};
        var arrayToString = [].toString;
        var arrayJoin = [].join;

        if (fails(function () { arrayToString.call({}); })) {
          arrayToString = function toString() {
            return arrayJoin.call(this);
          };
        }

        var IS_NOT_ARRAY_METHOD = Uint8ArrayPrototype.toString != arrayToString;

        // `%TypedArray%.prototype.toString` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.tostring
        exportTypedArrayMethod('toString', arrayToString, IS_NOT_ARRAY_METHOD);

        var nativeJoin = [].join;

        var ES3_STRINGS = indexedObject != Object;
        var STRICT_METHOD$4 = arrayMethodIsStrict('join', ',');

        // `Array.prototype.join` method
        // https://tc39.es/ecma262/#sec-array.prototype.join
        _export({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD$4 }, {
          join: function join(separator) {
            return nativeJoin.call(toIndexedObject(this), separator === undefined ? ',' : separator);
          }
        });

        var createProperty = function (object, key, value) {
          var propertyKey = toPrimitive(key);
          if (propertyKey in object) objectDefineProperty.f(object, propertyKey, createPropertyDescriptor(0, value));
          else object[propertyKey] = value;
        };

        var HAS_SPECIES_SUPPORT$2 = arrayMethodHasSpeciesSupport('slice');

        var SPECIES$1 = wellKnownSymbol('species');
        var nativeSlice = [].slice;
        var max$3 = Math.max;

        // `Array.prototype.slice` method
        // https://tc39.es/ecma262/#sec-array.prototype.slice
        // fallback for not array-like ES3 strings and DOM objects
        _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$2 }, {
          slice: function slice(start, end) {
            var O = toIndexedObject(this);
            var length = toLength(O.length);
            var k = toAbsoluteIndex(start, length);
            var fin = toAbsoluteIndex(end === undefined ? length : end, length);
            // inline `ArraySpeciesCreate` for usage native `Array#slice` where it's possible
            var Constructor, result, n;
            if (isArray(O)) {
              Constructor = O.constructor;
              // cross-realm fallback
              if (typeof Constructor == 'function' && (Constructor === Array || isArray(Constructor.prototype))) {
                Constructor = undefined;
              } else if (isObject$4(Constructor)) {
                Constructor = Constructor[SPECIES$1];
                if (Constructor === null) Constructor = undefined;
              }
              if (Constructor === Array || Constructor === undefined) {
                return nativeSlice.call(O, k, fin);
              }
            }
            result = new (Constructor === undefined ? Array : Constructor)(max$3(fin - k, 0));
            for (n = 0; k < fin; k++, n++) if (k in O) createProperty(result, n, O[k]);
            result.length = n;
            return result;
          }
        });

        var ITERATOR$1 = wellKnownSymbol('iterator');

        var nativeUrl = !fails(function () {
          var url = new URL('b?a=1&b=2&c=3', 'http://a');
          var searchParams = url.searchParams;
          var result = '';
          url.pathname = 'c%20d';
          searchParams.forEach(function (value, key) {
            searchParams['delete']('b');
            result += key + value;
          });
          return (isPure && !url.toJSON)
            || !searchParams.sort
            || url.href !== 'http://a/c%20d?a=1&c=3'
            || searchParams.get('c') !== '3'
            || String(new URLSearchParams('?a=1')) !== 'a=1'
            || !searchParams[ITERATOR$1]
            // throws in Edge
            || new URL('https://a@b').username !== 'a'
            || new URLSearchParams(new URLSearchParams('a=b')).get('a') !== 'b'
            // not punycoded in Edge
            || new URL('http://тест').host !== 'xn--e1aybc'
            // not escaped in Chrome 62-
            || new URL('http://a#б').hash !== '#%D0%B1'
            // fails in Chrome 66-
            || result !== 'a1c3'
            // throws in Safari
            || new URL('http://x', undefined).host !== 'x';
        });

        // eslint-disable-next-line es/no-object-assign -- safe
        var $assign = Object.assign;
        // eslint-disable-next-line es/no-object-defineproperty -- required for testing
        var defineProperty$4 = Object.defineProperty;

        // `Object.assign` method
        // https://tc39.es/ecma262/#sec-object.assign
        var objectAssign = !$assign || fails(function () {
          // should have correct order of operations (Edge bug)
          if (descriptors && $assign({ b: 1 }, $assign(defineProperty$4({}, 'a', {
            enumerable: true,
            get: function () {
              defineProperty$4(this, 'b', {
                value: 3,
                enumerable: false
              });
            }
          }), { b: 2 })).b !== 1) return true;
          // should work with symbols and should have deterministic property order (V8 bug)
          var A = {};
          var B = {};
          // eslint-disable-next-line es/no-symbol -- safe
          var symbol = Symbol();
          var alphabet = 'abcdefghijklmnopqrst';
          A[symbol] = 7;
          alphabet.split('').forEach(function (chr) { B[chr] = chr; });
          return $assign({}, A)[symbol] != 7 || objectKeys($assign({}, B)).join('') != alphabet;
        }) ? function assign(target, source) { // eslint-disable-line no-unused-vars -- required for `.length`
          var T = toObject(target);
          var argumentsLength = arguments.length;
          var index = 1;
          var getOwnPropertySymbols = objectGetOwnPropertySymbols.f;
          var propertyIsEnumerable = objectPropertyIsEnumerable.f;
          while (argumentsLength > index) {
            var S = indexedObject(arguments[index++]);
            var keys = getOwnPropertySymbols ? objectKeys(S).concat(getOwnPropertySymbols(S)) : objectKeys(S);
            var length = keys.length;
            var j = 0;
            var key;
            while (length > j) {
              key = keys[j++];
              if (!descriptors || propertyIsEnumerable.call(S, key)) T[key] = S[key];
            }
          } return T;
        } : $assign;

        // call something on iterator step with safe closing on error
        var callWithSafeIterationClosing = function (iterator, fn, value, ENTRIES) {
          try {
            return ENTRIES ? fn(anObject(value)[0], value[1]) : fn(value);
          } catch (error) {
            iteratorClose(iterator);
            throw error;
          }
        };

        // `Array.from` method implementation
        // https://tc39.es/ecma262/#sec-array.from
        var arrayFrom = function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {
          var O = toObject(arrayLike);
          var C = typeof this == 'function' ? this : Array;
          var argumentsLength = arguments.length;
          var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
          var mapping = mapfn !== undefined;
          var iteratorMethod = getIteratorMethod(O);
          var index = 0;
          var length, result, step, iterator, next, value;
          if (mapping) mapfn = functionBindContext(mapfn, argumentsLength > 2 ? arguments[2] : undefined, 2);
          // if the target is not iterable or it's an array with the default iterator - use a simple case
          if (iteratorMethod != undefined && !(C == Array && isArrayIteratorMethod(iteratorMethod))) {
            iterator = iteratorMethod.call(O);
            next = iterator.next;
            result = new C();
            for (;!(step = next.call(iterator)).done; index++) {
              value = mapping ? callWithSafeIterationClosing(iterator, mapfn, [step.value, index], true) : step.value;
              createProperty(result, index, value);
            }
          } else {
            length = toLength(O.length);
            result = new C(length);
            for (;length > index; index++) {
              value = mapping ? mapfn(O[index], index) : O[index];
              createProperty(result, index, value);
            }
          }
          result.length = index;
          return result;
        };

        // based on https://github.com/bestiejs/punycode.js/blob/master/punycode.js
        var maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1
        var base = 36;
        var tMin = 1;
        var tMax = 26;
        var skew = 38;
        var damp = 700;
        var initialBias = 72;
        var initialN = 128; // 0x80
        var delimiter = '-'; // '\x2D'
        var regexNonASCII = /[^\0-\u007E]/; // non-ASCII chars
        var regexSeparators = /[.\u3002\uFF0E\uFF61]/g; // RFC 3490 separators
        var OVERFLOW_ERROR = 'Overflow: input needs wider integers to process';
        var baseMinusTMin = base - tMin;
        var floor$3 = Math.floor;
        var stringFromCharCode = String.fromCharCode;

        /**
         * Creates an array containing the numeric code points of each Unicode
         * character in the string. While JavaScript uses UCS-2 internally,
         * this function will convert a pair of surrogate halves (each of which
         * UCS-2 exposes as separate characters) into a single code point,
         * matching UTF-16.
         */
        var ucs2decode = function (string) {
          var output = [];
          var counter = 0;
          var length = string.length;
          while (counter < length) {
            var value = string.charCodeAt(counter++);
            if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
              // It's a high surrogate, and there is a next character.
              var extra = string.charCodeAt(counter++);
              if ((extra & 0xFC00) == 0xDC00) { // Low surrogate.
                output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
              } else {
                // It's an unmatched surrogate; only append this code unit, in case the
                // next code unit is the high surrogate of a surrogate pair.
                output.push(value);
                counter--;
              }
            } else {
              output.push(value);
            }
          }
          return output;
        };

        /**
         * Converts a digit/integer into a basic code point.
         */
        var digitToBasic = function (digit) {
          //  0..25 map to ASCII a..z or A..Z
          // 26..35 map to ASCII 0..9
          return digit + 22 + 75 * (digit < 26);
        };

        /**
         * Bias adaptation function as per section 3.4 of RFC 3492.
         * https://tools.ietf.org/html/rfc3492#section-3.4
         */
        var adapt = function (delta, numPoints, firstTime) {
          var k = 0;
          delta = firstTime ? floor$3(delta / damp) : delta >> 1;
          delta += floor$3(delta / numPoints);
          for (; delta > baseMinusTMin * tMax >> 1; k += base) {
            delta = floor$3(delta / baseMinusTMin);
          }
          return floor$3(k + (baseMinusTMin + 1) * delta / (delta + skew));
        };

        /**
         * Converts a string of Unicode symbols (e.g. a domain name label) to a
         * Punycode string of ASCII-only symbols.
         */
        // eslint-disable-next-line max-statements -- TODO
        var encode = function (input) {
          var output = [];

          // Convert the input in UCS-2 to an array of Unicode code points.
          input = ucs2decode(input);

          // Cache the length.
          var inputLength = input.length;

          // Initialize the state.
          var n = initialN;
          var delta = 0;
          var bias = initialBias;
          var i, currentValue;

          // Handle the basic code points.
          for (i = 0; i < input.length; i++) {
            currentValue = input[i];
            if (currentValue < 0x80) {
              output.push(stringFromCharCode(currentValue));
            }
          }

          var basicLength = output.length; // number of basic code points.
          var handledCPCount = basicLength; // number of code points that have been handled;

          // Finish the basic string with a delimiter unless it's empty.
          if (basicLength) {
            output.push(delimiter);
          }

          // Main encoding loop:
          while (handledCPCount < inputLength) {
            // All non-basic code points < n have been handled already. Find the next larger one:
            var m = maxInt;
            for (i = 0; i < input.length; i++) {
              currentValue = input[i];
              if (currentValue >= n && currentValue < m) {
                m = currentValue;
              }
            }

            // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>, but guard against overflow.
            var handledCPCountPlusOne = handledCPCount + 1;
            if (m - n > floor$3((maxInt - delta) / handledCPCountPlusOne)) {
              throw RangeError(OVERFLOW_ERROR);
            }

            delta += (m - n) * handledCPCountPlusOne;
            n = m;

            for (i = 0; i < input.length; i++) {
              currentValue = input[i];
              if (currentValue < n && ++delta > maxInt) {
                throw RangeError(OVERFLOW_ERROR);
              }
              if (currentValue == n) {
                // Represent delta as a generalized variable-length integer.
                var q = delta;
                for (var k = base; /* no condition */; k += base) {
                  var t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
                  if (q < t) break;
                  var qMinusT = q - t;
                  var baseMinusT = base - t;
                  output.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT)));
                  q = floor$3(qMinusT / baseMinusT);
                }

                output.push(stringFromCharCode(digitToBasic(q)));
                bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
                delta = 0;
                ++handledCPCount;
              }
            }

            ++delta;
            ++n;
          }
          return output.join('');
        };

        var stringPunycodeToAscii = function (input) {
          var encoded = [];
          var labels = input.toLowerCase().replace(regexSeparators, '\u002E').split('.');
          var i, label;
          for (i = 0; i < labels.length; i++) {
            label = labels[i];
            encoded.push(regexNonASCII.test(label) ? 'xn--' + encode(label) : label);
          }
          return encoded.join('.');
        };

        var getIterator = function (it) {
          var iteratorMethod = getIteratorMethod(it);
          if (typeof iteratorMethod != 'function') {
            throw TypeError(String(it) + ' is not iterable');
          } return anObject(iteratorMethod.call(it));
        };

        // TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`





















        var $fetch = getBuiltIn('fetch');
        var Headers$1 = getBuiltIn('Headers');
        var ITERATOR = wellKnownSymbol('iterator');
        var URL_SEARCH_PARAMS = 'URLSearchParams';
        var URL_SEARCH_PARAMS_ITERATOR = URL_SEARCH_PARAMS + 'Iterator';
        var setInternalState$2 = internalState.set;
        var getInternalParamsState = internalState.getterFor(URL_SEARCH_PARAMS);
        var getInternalIteratorState = internalState.getterFor(URL_SEARCH_PARAMS_ITERATOR);

        var plus = /\+/g;
        var sequences = Array(4);

        var percentSequence = function (bytes) {
          return sequences[bytes - 1] || (sequences[bytes - 1] = RegExp('((?:%[\\da-f]{2}){' + bytes + '})', 'gi'));
        };

        var percentDecode = function (sequence) {
          try {
            return decodeURIComponent(sequence);
          } catch (error) {
            return sequence;
          }
        };

        var deserialize = function (it) {
          var result = it.replace(plus, ' ');
          var bytes = 4;
          try {
            return decodeURIComponent(result);
          } catch (error) {
            while (bytes) {
              result = result.replace(percentSequence(bytes--), percentDecode);
            }
            return result;
          }
        };

        var find$1 = /[!'()~]|%20/g;

        var replace$1 = {
          '!': '%21',
          "'": '%27',
          '(': '%28',
          ')': '%29',
          '~': '%7E',
          '%20': '+'
        };

        var replacer = function (match) {
          return replace$1[match];
        };

        var serialize = function (it) {
          return encodeURIComponent(it).replace(find$1, replacer);
        };

        var parseSearchParams = function (result, query) {
          if (query) {
            var attributes = query.split('&');
            var index = 0;
            var attribute, entry;
            while (index < attributes.length) {
              attribute = attributes[index++];
              if (attribute.length) {
                entry = attribute.split('=');
                result.push({
                  key: deserialize(entry.shift()),
                  value: deserialize(entry.join('='))
                });
              }
            }
          }
        };

        var updateSearchParams = function (query) {
          this.entries.length = 0;
          parseSearchParams(this.entries, query);
        };

        var validateArgumentsLength = function (passed, required) {
          if (passed < required) throw TypeError('Not enough arguments');
        };

        var URLSearchParamsIterator = createIteratorConstructor(function Iterator(params, kind) {
          setInternalState$2(this, {
            type: URL_SEARCH_PARAMS_ITERATOR,
            iterator: getIterator(getInternalParamsState(params).entries),
            kind: kind
          });
        }, 'Iterator', function next() {
          var state = getInternalIteratorState(this);
          var kind = state.kind;
          var step = state.iterator.next();
          var entry = step.value;
          if (!step.done) {
            step.value = kind === 'keys' ? entry.key : kind === 'values' ? entry.value : [entry.key, entry.value];
          } return step;
        });

        // `URLSearchParams` constructor
        // https://url.spec.whatwg.org/#interface-urlsearchparams
        var URLSearchParamsConstructor = function URLSearchParams(/* init */) {
          anInstance(this, URLSearchParamsConstructor, URL_SEARCH_PARAMS);
          var init = arguments.length > 0 ? arguments[0] : undefined;
          var that = this;
          var entries = [];
          var iteratorMethod, iterator, next, step, entryIterator, entryNext, first, second, key;

          setInternalState$2(that, {
            type: URL_SEARCH_PARAMS,
            entries: entries,
            updateURL: function () { /* empty */ },
            updateSearchParams: updateSearchParams
          });

          if (init !== undefined) {
            if (isObject$4(init)) {
              iteratorMethod = getIteratorMethod(init);
              if (typeof iteratorMethod === 'function') {
                iterator = iteratorMethod.call(init);
                next = iterator.next;
                while (!(step = next.call(iterator)).done) {
                  entryIterator = getIterator(anObject(step.value));
                  entryNext = entryIterator.next;
                  if (
                    (first = entryNext.call(entryIterator)).done ||
                    (second = entryNext.call(entryIterator)).done ||
                    !entryNext.call(entryIterator).done
                  ) throw TypeError('Expected sequence with length 2');
                  entries.push({ key: first.value + '', value: second.value + '' });
                }
              } else for (key in init) if (has$1(init, key)) entries.push({ key: key, value: init[key] + '' });
            } else {
              parseSearchParams(entries, typeof init === 'string' ? init.charAt(0) === '?' ? init.slice(1) : init : init + '');
            }
          }
        };

        var URLSearchParamsPrototype = URLSearchParamsConstructor.prototype;

        redefineAll(URLSearchParamsPrototype, {
          // `URLSearchParams.prototype.append` method
          // https://url.spec.whatwg.org/#dom-urlsearchparams-append
          append: function append(name, value) {
            validateArgumentsLength(arguments.length, 2);
            var state = getInternalParamsState(this);
            state.entries.push({ key: name + '', value: value + '' });
            state.updateURL();
          },
          // `URLSearchParams.prototype.delete` method
          // https://url.spec.whatwg.org/#dom-urlsearchparams-delete
          'delete': function (name) {
            validateArgumentsLength(arguments.length, 1);
            var state = getInternalParamsState(this);
            var entries = state.entries;
            var key = name + '';
            var index = 0;
            while (index < entries.length) {
              if (entries[index].key === key) entries.splice(index, 1);
              else index++;
            }
            state.updateURL();
          },
          // `URLSearchParams.prototype.get` method
          // https://url.spec.whatwg.org/#dom-urlsearchparams-get
          get: function get(name) {
            validateArgumentsLength(arguments.length, 1);
            var entries = getInternalParamsState(this).entries;
            var key = name + '';
            var index = 0;
            for (; index < entries.length; index++) {
              if (entries[index].key === key) return entries[index].value;
            }
            return null;
          },
          // `URLSearchParams.prototype.getAll` method
          // https://url.spec.whatwg.org/#dom-urlsearchparams-getall
          getAll: function getAll(name) {
            validateArgumentsLength(arguments.length, 1);
            var entries = getInternalParamsState(this).entries;
            var key = name + '';
            var result = [];
            var index = 0;
            for (; index < entries.length; index++) {
              if (entries[index].key === key) result.push(entries[index].value);
            }
            return result;
          },
          // `URLSearchParams.prototype.has` method
          // https://url.spec.whatwg.org/#dom-urlsearchparams-has
          has: function has(name) {
            validateArgumentsLength(arguments.length, 1);
            var entries = getInternalParamsState(this).entries;
            var key = name + '';
            var index = 0;
            while (index < entries.length) {
              if (entries[index++].key === key) return true;
            }
            return false;
          },
          // `URLSearchParams.prototype.set` method
          // https://url.spec.whatwg.org/#dom-urlsearchparams-set
          set: function set(name, value) {
            validateArgumentsLength(arguments.length, 1);
            var state = getInternalParamsState(this);
            var entries = state.entries;
            var found = false;
            var key = name + '';
            var val = value + '';
            var index = 0;
            var entry;
            for (; index < entries.length; index++) {
              entry = entries[index];
              if (entry.key === key) {
                if (found) entries.splice(index--, 1);
                else {
                  found = true;
                  entry.value = val;
                }
              }
            }
            if (!found) entries.push({ key: key, value: val });
            state.updateURL();
          },
          // `URLSearchParams.prototype.sort` method
          // https://url.spec.whatwg.org/#dom-urlsearchparams-sort
          sort: function sort() {
            var state = getInternalParamsState(this);
            var entries = state.entries;
            // Array#sort is not stable in some engines
            var slice = entries.slice();
            var entry, entriesIndex, sliceIndex;
            entries.length = 0;
            for (sliceIndex = 0; sliceIndex < slice.length; sliceIndex++) {
              entry = slice[sliceIndex];
              for (entriesIndex = 0; entriesIndex < sliceIndex; entriesIndex++) {
                if (entries[entriesIndex].key > entry.key) {
                  entries.splice(entriesIndex, 0, entry);
                  break;
                }
              }
              if (entriesIndex === sliceIndex) entries.push(entry);
            }
            state.updateURL();
          },
          // `URLSearchParams.prototype.forEach` method
          forEach: function forEach(callback /* , thisArg */) {
            var entries = getInternalParamsState(this).entries;
            var boundFunction = functionBindContext(callback, arguments.length > 1 ? arguments[1] : undefined, 3);
            var index = 0;
            var entry;
            while (index < entries.length) {
              entry = entries[index++];
              boundFunction(entry.value, entry.key, this);
            }
          },
          // `URLSearchParams.prototype.keys` method
          keys: function keys() {
            return new URLSearchParamsIterator(this, 'keys');
          },
          // `URLSearchParams.prototype.values` method
          values: function values() {
            return new URLSearchParamsIterator(this, 'values');
          },
          // `URLSearchParams.prototype.entries` method
          entries: function entries() {
            return new URLSearchParamsIterator(this, 'entries');
          }
        }, { enumerable: true });

        // `URLSearchParams.prototype[@@iterator]` method
        redefine(URLSearchParamsPrototype, ITERATOR, URLSearchParamsPrototype.entries);

        // `URLSearchParams.prototype.toString` method
        // https://url.spec.whatwg.org/#urlsearchparams-stringification-behavior
        redefine(URLSearchParamsPrototype, 'toString', function toString() {
          var entries = getInternalParamsState(this).entries;
          var result = [];
          var index = 0;
          var entry;
          while (index < entries.length) {
            entry = entries[index++];
            result.push(serialize(entry.key) + '=' + serialize(entry.value));
          } return result.join('&');
        }, { enumerable: true });

        setToStringTag(URLSearchParamsConstructor, URL_SEARCH_PARAMS);

        _export({ global: true, forced: !nativeUrl }, {
          URLSearchParams: URLSearchParamsConstructor
        });

        // Wrap `fetch` for correct work with polyfilled `URLSearchParams`
        // https://github.com/zloirock/core-js/issues/674
        if (!nativeUrl && typeof $fetch == 'function' && typeof Headers$1 == 'function') {
          _export({ global: true, enumerable: true, forced: true }, {
            fetch: function fetch(input /* , init */) {
              var args = [input];
              var init, body, headers;
              if (arguments.length > 1) {
                init = arguments[1];
                if (isObject$4(init)) {
                  body = init.body;
                  if (classof(body) === URL_SEARCH_PARAMS) {
                    headers = init.headers ? new Headers$1(init.headers) : new Headers$1();
                    if (!headers.has('content-type')) {
                      headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
                    }
                    init = objectCreate(init, {
                      body: createPropertyDescriptor(0, String(body)),
                      headers: createPropertyDescriptor(0, headers)
                    });
                  }
                }
                args.push(init);
              } return $fetch.apply(this, args);
            }
          });
        }

        var web_urlSearchParams = {
          URLSearchParams: URLSearchParamsConstructor,
          getState: getInternalParamsState
        };

        // TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`











        var codeAt = stringMultibyte.codeAt;





        var NativeURL = global$2.URL;
        var URLSearchParams$1 = web_urlSearchParams.URLSearchParams;
        var getInternalSearchParamsState = web_urlSearchParams.getState;
        var setInternalState$1 = internalState.set;
        var getInternalURLState = internalState.getterFor('URL');
        var floor$2 = Math.floor;
        var pow$1 = Math.pow;

        var INVALID_AUTHORITY = 'Invalid authority';
        var INVALID_SCHEME = 'Invalid scheme';
        var INVALID_HOST = 'Invalid host';
        var INVALID_PORT = 'Invalid port';

        var ALPHA = /[A-Za-z]/;
        // eslint-disable-next-line regexp/no-obscure-range -- safe
        var ALPHANUMERIC = /[\d+-.A-Za-z]/;
        var DIGIT = /\d/;
        var HEX_START = /^0x/i;
        var OCT = /^[0-7]+$/;
        var DEC = /^\d+$/;
        var HEX = /^[\dA-Fa-f]+$/;
        /* eslint-disable no-control-regex -- safe */
        var FORBIDDEN_HOST_CODE_POINT = /[\0\t\n\r #%/:<>?@[\\\]^|]/;
        var FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT = /[\0\t\n\r #/:<>?@[\\\]^|]/;
        var LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE = /^[\u0000-\u001F ]+|[\u0000-\u001F ]+$/g;
        var TAB_AND_NEW_LINE = /[\t\n\r]/g;
        /* eslint-enable no-control-regex -- safe */
        var EOF;

        var parseHost = function (url, input) {
          var result, codePoints, index;
          if (input.charAt(0) == '[') {
            if (input.charAt(input.length - 1) != ']') return INVALID_HOST;
            result = parseIPv6(input.slice(1, -1));
            if (!result) return INVALID_HOST;
            url.host = result;
          // opaque host
          } else if (!isSpecial(url)) {
            if (FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT.test(input)) return INVALID_HOST;
            result = '';
            codePoints = arrayFrom(input);
            for (index = 0; index < codePoints.length; index++) {
              result += percentEncode(codePoints[index], C0ControlPercentEncodeSet);
            }
            url.host = result;
          } else {
            input = stringPunycodeToAscii(input);
            if (FORBIDDEN_HOST_CODE_POINT.test(input)) return INVALID_HOST;
            result = parseIPv4(input);
            if (result === null) return INVALID_HOST;
            url.host = result;
          }
        };

        var parseIPv4 = function (input) {
          var parts = input.split('.');
          var partsLength, numbers, index, part, radix, number, ipv4;
          if (parts.length && parts[parts.length - 1] == '') {
            parts.pop();
          }
          partsLength = parts.length;
          if (partsLength > 4) return input;
          numbers = [];
          for (index = 0; index < partsLength; index++) {
            part = parts[index];
            if (part == '') return input;
            radix = 10;
            if (part.length > 1 && part.charAt(0) == '0') {
              radix = HEX_START.test(part) ? 16 : 8;
              part = part.slice(radix == 8 ? 1 : 2);
            }
            if (part === '') {
              number = 0;
            } else {
              if (!(radix == 10 ? DEC : radix == 8 ? OCT : HEX).test(part)) return input;
              number = parseInt(part, radix);
            }
            numbers.push(number);
          }
          for (index = 0; index < partsLength; index++) {
            number = numbers[index];
            if (index == partsLength - 1) {
              if (number >= pow$1(256, 5 - partsLength)) return null;
            } else if (number > 255) return null;
          }
          ipv4 = numbers.pop();
          for (index = 0; index < numbers.length; index++) {
            ipv4 += numbers[index] * pow$1(256, 3 - index);
          }
          return ipv4;
        };

        // eslint-disable-next-line max-statements -- TODO
        var parseIPv6 = function (input) {
          var address = [0, 0, 0, 0, 0, 0, 0, 0];
          var pieceIndex = 0;
          var compress = null;
          var pointer = 0;
          var value, length, numbersSeen, ipv4Piece, number, swaps, swap;

          var char = function () {
            return input.charAt(pointer);
          };

          if (char() == ':') {
            if (input.charAt(1) != ':') return;
            pointer += 2;
            pieceIndex++;
            compress = pieceIndex;
          }
          while (char()) {
            if (pieceIndex == 8) return;
            if (char() == ':') {
              if (compress !== null) return;
              pointer++;
              pieceIndex++;
              compress = pieceIndex;
              continue;
            }
            value = length = 0;
            while (length < 4 && HEX.test(char())) {
              value = value * 16 + parseInt(char(), 16);
              pointer++;
              length++;
            }
            if (char() == '.') {
              if (length == 0) return;
              pointer -= length;
              if (pieceIndex > 6) return;
              numbersSeen = 0;
              while (char()) {
                ipv4Piece = null;
                if (numbersSeen > 0) {
                  if (char() == '.' && numbersSeen < 4) pointer++;
                  else return;
                }
                if (!DIGIT.test(char())) return;
                while (DIGIT.test(char())) {
                  number = parseInt(char(), 10);
                  if (ipv4Piece === null) ipv4Piece = number;
                  else if (ipv4Piece == 0) return;
                  else ipv4Piece = ipv4Piece * 10 + number;
                  if (ipv4Piece > 255) return;
                  pointer++;
                }
                address[pieceIndex] = address[pieceIndex] * 256 + ipv4Piece;
                numbersSeen++;
                if (numbersSeen == 2 || numbersSeen == 4) pieceIndex++;
              }
              if (numbersSeen != 4) return;
              break;
            } else if (char() == ':') {
              pointer++;
              if (!char()) return;
            } else if (char()) return;
            address[pieceIndex++] = value;
          }
          if (compress !== null) {
            swaps = pieceIndex - compress;
            pieceIndex = 7;
            while (pieceIndex != 0 && swaps > 0) {
              swap = address[pieceIndex];
              address[pieceIndex--] = address[compress + swaps - 1];
              address[compress + --swaps] = swap;
            }
          } else if (pieceIndex != 8) return;
          return address;
        };

        var findLongestZeroSequence = function (ipv6) {
          var maxIndex = null;
          var maxLength = 1;
          var currStart = null;
          var currLength = 0;
          var index = 0;
          for (; index < 8; index++) {
            if (ipv6[index] !== 0) {
              if (currLength > maxLength) {
                maxIndex = currStart;
                maxLength = currLength;
              }
              currStart = null;
              currLength = 0;
            } else {
              if (currStart === null) currStart = index;
              ++currLength;
            }
          }
          if (currLength > maxLength) {
            maxIndex = currStart;
            maxLength = currLength;
          }
          return maxIndex;
        };

        var serializeHost = function (host) {
          var result, index, compress, ignore0;
          // ipv4
          if (typeof host == 'number') {
            result = [];
            for (index = 0; index < 4; index++) {
              result.unshift(host % 256);
              host = floor$2(host / 256);
            } return result.join('.');
          // ipv6
          } else if (typeof host == 'object') {
            result = '';
            compress = findLongestZeroSequence(host);
            for (index = 0; index < 8; index++) {
              if (ignore0 && host[index] === 0) continue;
              if (ignore0) ignore0 = false;
              if (compress === index) {
                result += index ? ':' : '::';
                ignore0 = true;
              } else {
                result += host[index].toString(16);
                if (index < 7) result += ':';
              }
            }
            return '[' + result + ']';
          } return host;
        };

        var C0ControlPercentEncodeSet = {};
        var fragmentPercentEncodeSet = objectAssign({}, C0ControlPercentEncodeSet, {
          ' ': 1, '"': 1, '<': 1, '>': 1, '`': 1
        });
        var pathPercentEncodeSet = objectAssign({}, fragmentPercentEncodeSet, {
          '#': 1, '?': 1, '{': 1, '}': 1
        });
        var userinfoPercentEncodeSet = objectAssign({}, pathPercentEncodeSet, {
          '/': 1, ':': 1, ';': 1, '=': 1, '@': 1, '[': 1, '\\': 1, ']': 1, '^': 1, '|': 1
        });

        var percentEncode = function (char, set) {
          var code = codeAt(char, 0);
          return code > 0x20 && code < 0x7F && !has$1(set, char) ? char : encodeURIComponent(char);
        };

        var specialSchemes = {
          ftp: 21,
          file: null,
          http: 80,
          https: 443,
          ws: 80,
          wss: 443
        };

        var isSpecial = function (url) {
          return has$1(specialSchemes, url.scheme);
        };

        var includesCredentials = function (url) {
          return url.username != '' || url.password != '';
        };

        var cannotHaveUsernamePasswordPort = function (url) {
          return !url.host || url.cannotBeABaseURL || url.scheme == 'file';
        };

        var isWindowsDriveLetter = function (string, normalized) {
          var second;
          return string.length == 2 && ALPHA.test(string.charAt(0))
            && ((second = string.charAt(1)) == ':' || (!normalized && second == '|'));
        };

        var startsWithWindowsDriveLetter = function (string) {
          var third;
          return string.length > 1 && isWindowsDriveLetter(string.slice(0, 2)) && (
            string.length == 2 ||
            ((third = string.charAt(2)) === '/' || third === '\\' || third === '?' || third === '#')
          );
        };

        var shortenURLsPath = function (url) {
          var path = url.path;
          var pathSize = path.length;
          if (pathSize && (url.scheme != 'file' || pathSize != 1 || !isWindowsDriveLetter(path[0], true))) {
            path.pop();
          }
        };

        var isSingleDot = function (segment) {
          return segment === '.' || segment.toLowerCase() === '%2e';
        };

        var isDoubleDot = function (segment) {
          segment = segment.toLowerCase();
          return segment === '..' || segment === '%2e.' || segment === '.%2e' || segment === '%2e%2e';
        };

        // States:
        var SCHEME_START = {};
        var SCHEME = {};
        var NO_SCHEME = {};
        var SPECIAL_RELATIVE_OR_AUTHORITY = {};
        var PATH_OR_AUTHORITY = {};
        var RELATIVE = {};
        var RELATIVE_SLASH = {};
        var SPECIAL_AUTHORITY_SLASHES = {};
        var SPECIAL_AUTHORITY_IGNORE_SLASHES = {};
        var AUTHORITY = {};
        var HOST = {};
        var HOSTNAME = {};
        var PORT = {};
        var FILE = {};
        var FILE_SLASH = {};
        var FILE_HOST = {};
        var PATH_START = {};
        var PATH = {};
        var CANNOT_BE_A_BASE_URL_PATH = {};
        var QUERY = {};
        var FRAGMENT = {};

        // eslint-disable-next-line max-statements -- TODO
        var parseURL = function (url, input, stateOverride, base) {
          var state = stateOverride || SCHEME_START;
          var pointer = 0;
          var buffer = '';
          var seenAt = false;
          var seenBracket = false;
          var seenPasswordToken = false;
          var codePoints, char, bufferCodePoints, failure;

          if (!stateOverride) {
            url.scheme = '';
            url.username = '';
            url.password = '';
            url.host = null;
            url.port = null;
            url.path = [];
            url.query = null;
            url.fragment = null;
            url.cannotBeABaseURL = false;
            input = input.replace(LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE, '');
          }

          input = input.replace(TAB_AND_NEW_LINE, '');

          codePoints = arrayFrom(input);

          while (pointer <= codePoints.length) {
            char = codePoints[pointer];
            switch (state) {
              case SCHEME_START:
                if (char && ALPHA.test(char)) {
                  buffer += char.toLowerCase();
                  state = SCHEME;
                } else if (!stateOverride) {
                  state = NO_SCHEME;
                  continue;
                } else return INVALID_SCHEME;
                break;

              case SCHEME:
                if (char && (ALPHANUMERIC.test(char) || char == '+' || char == '-' || char == '.')) {
                  buffer += char.toLowerCase();
                } else if (char == ':') {
                  if (stateOverride && (
                    (isSpecial(url) != has$1(specialSchemes, buffer)) ||
                    (buffer == 'file' && (includesCredentials(url) || url.port !== null)) ||
                    (url.scheme == 'file' && !url.host)
                  )) return;
                  url.scheme = buffer;
                  if (stateOverride) {
                    if (isSpecial(url) && specialSchemes[url.scheme] == url.port) url.port = null;
                    return;
                  }
                  buffer = '';
                  if (url.scheme == 'file') {
                    state = FILE;
                  } else if (isSpecial(url) && base && base.scheme == url.scheme) {
                    state = SPECIAL_RELATIVE_OR_AUTHORITY;
                  } else if (isSpecial(url)) {
                    state = SPECIAL_AUTHORITY_SLASHES;
                  } else if (codePoints[pointer + 1] == '/') {
                    state = PATH_OR_AUTHORITY;
                    pointer++;
                  } else {
                    url.cannotBeABaseURL = true;
                    url.path.push('');
                    state = CANNOT_BE_A_BASE_URL_PATH;
                  }
                } else if (!stateOverride) {
                  buffer = '';
                  state = NO_SCHEME;
                  pointer = 0;
                  continue;
                } else return INVALID_SCHEME;
                break;

              case NO_SCHEME:
                if (!base || (base.cannotBeABaseURL && char != '#')) return INVALID_SCHEME;
                if (base.cannotBeABaseURL && char == '#') {
                  url.scheme = base.scheme;
                  url.path = base.path.slice();
                  url.query = base.query;
                  url.fragment = '';
                  url.cannotBeABaseURL = true;
                  state = FRAGMENT;
                  break;
                }
                state = base.scheme == 'file' ? FILE : RELATIVE;
                continue;

              case SPECIAL_RELATIVE_OR_AUTHORITY:
                if (char == '/' && codePoints[pointer + 1] == '/') {
                  state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
                  pointer++;
                } else {
                  state = RELATIVE;
                  continue;
                } break;

              case PATH_OR_AUTHORITY:
                if (char == '/') {
                  state = AUTHORITY;
                  break;
                } else {
                  state = PATH;
                  continue;
                }

              case RELATIVE:
                url.scheme = base.scheme;
                if (char == EOF) {
                  url.username = base.username;
                  url.password = base.password;
                  url.host = base.host;
                  url.port = base.port;
                  url.path = base.path.slice();
                  url.query = base.query;
                } else if (char == '/' || (char == '\\' && isSpecial(url))) {
                  state = RELATIVE_SLASH;
                } else if (char == '?') {
                  url.username = base.username;
                  url.password = base.password;
                  url.host = base.host;
                  url.port = base.port;
                  url.path = base.path.slice();
                  url.query = '';
                  state = QUERY;
                } else if (char == '#') {
                  url.username = base.username;
                  url.password = base.password;
                  url.host = base.host;
                  url.port = base.port;
                  url.path = base.path.slice();
                  url.query = base.query;
                  url.fragment = '';
                  state = FRAGMENT;
                } else {
                  url.username = base.username;
                  url.password = base.password;
                  url.host = base.host;
                  url.port = base.port;
                  url.path = base.path.slice();
                  url.path.pop();
                  state = PATH;
                  continue;
                } break;

              case RELATIVE_SLASH:
                if (isSpecial(url) && (char == '/' || char == '\\')) {
                  state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
                } else if (char == '/') {
                  state = AUTHORITY;
                } else {
                  url.username = base.username;
                  url.password = base.password;
                  url.host = base.host;
                  url.port = base.port;
                  state = PATH;
                  continue;
                } break;

              case SPECIAL_AUTHORITY_SLASHES:
                state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
                if (char != '/' || buffer.charAt(pointer + 1) != '/') continue;
                pointer++;
                break;

              case SPECIAL_AUTHORITY_IGNORE_SLASHES:
                if (char != '/' && char != '\\') {
                  state = AUTHORITY;
                  continue;
                } break;

              case AUTHORITY:
                if (char == '@') {
                  if (seenAt) buffer = '%40' + buffer;
                  seenAt = true;
                  bufferCodePoints = arrayFrom(buffer);
                  for (var i = 0; i < bufferCodePoints.length; i++) {
                    var codePoint = bufferCodePoints[i];
                    if (codePoint == ':' && !seenPasswordToken) {
                      seenPasswordToken = true;
                      continue;
                    }
                    var encodedCodePoints = percentEncode(codePoint, userinfoPercentEncodeSet);
                    if (seenPasswordToken) url.password += encodedCodePoints;
                    else url.username += encodedCodePoints;
                  }
                  buffer = '';
                } else if (
                  char == EOF || char == '/' || char == '?' || char == '#' ||
                  (char == '\\' && isSpecial(url))
                ) {
                  if (seenAt && buffer == '') return INVALID_AUTHORITY;
                  pointer -= arrayFrom(buffer).length + 1;
                  buffer = '';
                  state = HOST;
                } else buffer += char;
                break;

              case HOST:
              case HOSTNAME:
                if (stateOverride && url.scheme == 'file') {
                  state = FILE_HOST;
                  continue;
                } else if (char == ':' && !seenBracket) {
                  if (buffer == '') return INVALID_HOST;
                  failure = parseHost(url, buffer);
                  if (failure) return failure;
                  buffer = '';
                  state = PORT;
                  if (stateOverride == HOSTNAME) return;
                } else if (
                  char == EOF || char == '/' || char == '?' || char == '#' ||
                  (char == '\\' && isSpecial(url))
                ) {
                  if (isSpecial(url) && buffer == '') return INVALID_HOST;
                  if (stateOverride && buffer == '' && (includesCredentials(url) || url.port !== null)) return;
                  failure = parseHost(url, buffer);
                  if (failure) return failure;
                  buffer = '';
                  state = PATH_START;
                  if (stateOverride) return;
                  continue;
                } else {
                  if (char == '[') seenBracket = true;
                  else if (char == ']') seenBracket = false;
                  buffer += char;
                } break;

              case PORT:
                if (DIGIT.test(char)) {
                  buffer += char;
                } else if (
                  char == EOF || char == '/' || char == '?' || char == '#' ||
                  (char == '\\' && isSpecial(url)) ||
                  stateOverride
                ) {
                  if (buffer != '') {
                    var port = parseInt(buffer, 10);
                    if (port > 0xFFFF) return INVALID_PORT;
                    url.port = (isSpecial(url) && port === specialSchemes[url.scheme]) ? null : port;
                    buffer = '';
                  }
                  if (stateOverride) return;
                  state = PATH_START;
                  continue;
                } else return INVALID_PORT;
                break;

              case FILE:
                url.scheme = 'file';
                if (char == '/' || char == '\\') state = FILE_SLASH;
                else if (base && base.scheme == 'file') {
                  if (char == EOF) {
                    url.host = base.host;
                    url.path = base.path.slice();
                    url.query = base.query;
                  } else if (char == '?') {
                    url.host = base.host;
                    url.path = base.path.slice();
                    url.query = '';
                    state = QUERY;
                  } else if (char == '#') {
                    url.host = base.host;
                    url.path = base.path.slice();
                    url.query = base.query;
                    url.fragment = '';
                    state = FRAGMENT;
                  } else {
                    if (!startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {
                      url.host = base.host;
                      url.path = base.path.slice();
                      shortenURLsPath(url);
                    }
                    state = PATH;
                    continue;
                  }
                } else {
                  state = PATH;
                  continue;
                } break;

              case FILE_SLASH:
                if (char == '/' || char == '\\') {
                  state = FILE_HOST;
                  break;
                }
                if (base && base.scheme == 'file' && !startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {
                  if (isWindowsDriveLetter(base.path[0], true)) url.path.push(base.path[0]);
                  else url.host = base.host;
                }
                state = PATH;
                continue;

              case FILE_HOST:
                if (char == EOF || char == '/' || char == '\\' || char == '?' || char == '#') {
                  if (!stateOverride && isWindowsDriveLetter(buffer)) {
                    state = PATH;
                  } else if (buffer == '') {
                    url.host = '';
                    if (stateOverride) return;
                    state = PATH_START;
                  } else {
                    failure = parseHost(url, buffer);
                    if (failure) return failure;
                    if (url.host == 'localhost') url.host = '';
                    if (stateOverride) return;
                    buffer = '';
                    state = PATH_START;
                  } continue;
                } else buffer += char;
                break;

              case PATH_START:
                if (isSpecial(url)) {
                  state = PATH;
                  if (char != '/' && char != '\\') continue;
                } else if (!stateOverride && char == '?') {
                  url.query = '';
                  state = QUERY;
                } else if (!stateOverride && char == '#') {
                  url.fragment = '';
                  state = FRAGMENT;
                } else if (char != EOF) {
                  state = PATH;
                  if (char != '/') continue;
                } break;

              case PATH:
                if (
                  char == EOF || char == '/' ||
                  (char == '\\' && isSpecial(url)) ||
                  (!stateOverride && (char == '?' || char == '#'))
                ) {
                  if (isDoubleDot(buffer)) {
                    shortenURLsPath(url);
                    if (char != '/' && !(char == '\\' && isSpecial(url))) {
                      url.path.push('');
                    }
                  } else if (isSingleDot(buffer)) {
                    if (char != '/' && !(char == '\\' && isSpecial(url))) {
                      url.path.push('');
                    }
                  } else {
                    if (url.scheme == 'file' && !url.path.length && isWindowsDriveLetter(buffer)) {
                      if (url.host) url.host = '';
                      buffer = buffer.charAt(0) + ':'; // normalize windows drive letter
                    }
                    url.path.push(buffer);
                  }
                  buffer = '';
                  if (url.scheme == 'file' && (char == EOF || char == '?' || char == '#')) {
                    while (url.path.length > 1 && url.path[0] === '') {
                      url.path.shift();
                    }
                  }
                  if (char == '?') {
                    url.query = '';
                    state = QUERY;
                  } else if (char == '#') {
                    url.fragment = '';
                    state = FRAGMENT;
                  }
                } else {
                  buffer += percentEncode(char, pathPercentEncodeSet);
                } break;

              case CANNOT_BE_A_BASE_URL_PATH:
                if (char == '?') {
                  url.query = '';
                  state = QUERY;
                } else if (char == '#') {
                  url.fragment = '';
                  state = FRAGMENT;
                } else if (char != EOF) {
                  url.path[0] += percentEncode(char, C0ControlPercentEncodeSet);
                } break;

              case QUERY:
                if (!stateOverride && char == '#') {
                  url.fragment = '';
                  state = FRAGMENT;
                } else if (char != EOF) {
                  if (char == "'" && isSpecial(url)) url.query += '%27';
                  else if (char == '#') url.query += '%23';
                  else url.query += percentEncode(char, C0ControlPercentEncodeSet);
                } break;

              case FRAGMENT:
                if (char != EOF) url.fragment += percentEncode(char, fragmentPercentEncodeSet);
                break;
            }

            pointer++;
          }
        };

        // `URL` constructor
        // https://url.spec.whatwg.org/#url-class
        var URLConstructor = function URL(url /* , base */) {
          var that = anInstance(this, URLConstructor, 'URL');
          var base = arguments.length > 1 ? arguments[1] : undefined;
          var urlString = String(url);
          var state = setInternalState$1(that, { type: 'URL' });
          var baseState, failure;
          if (base !== undefined) {
            if (base instanceof URLConstructor) baseState = getInternalURLState(base);
            else {
              failure = parseURL(baseState = {}, String(base));
              if (failure) throw TypeError(failure);
            }
          }
          failure = parseURL(state, urlString, null, baseState);
          if (failure) throw TypeError(failure);
          var searchParams = state.searchParams = new URLSearchParams$1();
          var searchParamsState = getInternalSearchParamsState(searchParams);
          searchParamsState.updateSearchParams(state.query);
          searchParamsState.updateURL = function () {
            state.query = String(searchParams) || null;
          };
          if (!descriptors) {
            that.href = serializeURL.call(that);
            that.origin = getOrigin.call(that);
            that.protocol = getProtocol.call(that);
            that.username = getUsername.call(that);
            that.password = getPassword.call(that);
            that.host = getHost.call(that);
            that.hostname = getHostname.call(that);
            that.port = getPort.call(that);
            that.pathname = getPathname.call(that);
            that.search = getSearch.call(that);
            that.searchParams = getSearchParams.call(that);
            that.hash = getHash.call(that);
          }
        };

        var URLPrototype = URLConstructor.prototype;

        var serializeURL = function () {
          var url = getInternalURLState(this);
          var scheme = url.scheme;
          var username = url.username;
          var password = url.password;
          var host = url.host;
          var port = url.port;
          var path = url.path;
          var query = url.query;
          var fragment = url.fragment;
          var output = scheme + ':';
          if (host !== null) {
            output += '//';
            if (includesCredentials(url)) {
              output += username + (password ? ':' + password : '') + '@';
            }
            output += serializeHost(host);
            if (port !== null) output += ':' + port;
          } else if (scheme == 'file') output += '//';
          output += url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';
          if (query !== null) output += '?' + query;
          if (fragment !== null) output += '#' + fragment;
          return output;
        };

        var getOrigin = function () {
          var url = getInternalURLState(this);
          var scheme = url.scheme;
          var port = url.port;
          if (scheme == 'blob') try {
            return new URLConstructor(scheme.path[0]).origin;
          } catch (error) {
            return 'null';
          }
          if (scheme == 'file' || !isSpecial(url)) return 'null';
          return scheme + '://' + serializeHost(url.host) + (port !== null ? ':' + port : '');
        };

        var getProtocol = function () {
          return getInternalURLState(this).scheme + ':';
        };

        var getUsername = function () {
          return getInternalURLState(this).username;
        };

        var getPassword = function () {
          return getInternalURLState(this).password;
        };

        var getHost = function () {
          var url = getInternalURLState(this);
          var host = url.host;
          var port = url.port;
          return host === null ? ''
            : port === null ? serializeHost(host)
            : serializeHost(host) + ':' + port;
        };

        var getHostname = function () {
          var host = getInternalURLState(this).host;
          return host === null ? '' : serializeHost(host);
        };

        var getPort = function () {
          var port = getInternalURLState(this).port;
          return port === null ? '' : String(port);
        };

        var getPathname = function () {
          var url = getInternalURLState(this);
          var path = url.path;
          return url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';
        };

        var getSearch = function () {
          var query = getInternalURLState(this).query;
          return query ? '?' + query : '';
        };

        var getSearchParams = function () {
          return getInternalURLState(this).searchParams;
        };

        var getHash = function () {
          var fragment = getInternalURLState(this).fragment;
          return fragment ? '#' + fragment : '';
        };

        var accessorDescriptor = function (getter, setter) {
          return { get: getter, set: setter, configurable: true, enumerable: true };
        };

        if (descriptors) {
          objectDefineProperties(URLPrototype, {
            // `URL.prototype.href` accessors pair
            // https://url.spec.whatwg.org/#dom-url-href
            href: accessorDescriptor(serializeURL, function (href) {
              var url = getInternalURLState(this);
              var urlString = String(href);
              var failure = parseURL(url, urlString);
              if (failure) throw TypeError(failure);
              getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);
            }),
            // `URL.prototype.origin` getter
            // https://url.spec.whatwg.org/#dom-url-origin
            origin: accessorDescriptor(getOrigin),
            // `URL.prototype.protocol` accessors pair
            // https://url.spec.whatwg.org/#dom-url-protocol
            protocol: accessorDescriptor(getProtocol, function (protocol) {
              var url = getInternalURLState(this);
              parseURL(url, String(protocol) + ':', SCHEME_START);
            }),
            // `URL.prototype.username` accessors pair
            // https://url.spec.whatwg.org/#dom-url-username
            username: accessorDescriptor(getUsername, function (username) {
              var url = getInternalURLState(this);
              var codePoints = arrayFrom(String(username));
              if (cannotHaveUsernamePasswordPort(url)) return;
              url.username = '';
              for (var i = 0; i < codePoints.length; i++) {
                url.username += percentEncode(codePoints[i], userinfoPercentEncodeSet);
              }
            }),
            // `URL.prototype.password` accessors pair
            // https://url.spec.whatwg.org/#dom-url-password
            password: accessorDescriptor(getPassword, function (password) {
              var url = getInternalURLState(this);
              var codePoints = arrayFrom(String(password));
              if (cannotHaveUsernamePasswordPort(url)) return;
              url.password = '';
              for (var i = 0; i < codePoints.length; i++) {
                url.password += percentEncode(codePoints[i], userinfoPercentEncodeSet);
              }
            }),
            // `URL.prototype.host` accessors pair
            // https://url.spec.whatwg.org/#dom-url-host
            host: accessorDescriptor(getHost, function (host) {
              var url = getInternalURLState(this);
              if (url.cannotBeABaseURL) return;
              parseURL(url, String(host), HOST);
            }),
            // `URL.prototype.hostname` accessors pair
            // https://url.spec.whatwg.org/#dom-url-hostname
            hostname: accessorDescriptor(getHostname, function (hostname) {
              var url = getInternalURLState(this);
              if (url.cannotBeABaseURL) return;
              parseURL(url, String(hostname), HOSTNAME);
            }),
            // `URL.prototype.port` accessors pair
            // https://url.spec.whatwg.org/#dom-url-port
            port: accessorDescriptor(getPort, function (port) {
              var url = getInternalURLState(this);
              if (cannotHaveUsernamePasswordPort(url)) return;
              port = String(port);
              if (port == '') url.port = null;
              else parseURL(url, port, PORT);
            }),
            // `URL.prototype.pathname` accessors pair
            // https://url.spec.whatwg.org/#dom-url-pathname
            pathname: accessorDescriptor(getPathname, function (pathname) {
              var url = getInternalURLState(this);
              if (url.cannotBeABaseURL) return;
              url.path = [];
              parseURL(url, pathname + '', PATH_START);
            }),
            // `URL.prototype.search` accessors pair
            // https://url.spec.whatwg.org/#dom-url-search
            search: accessorDescriptor(getSearch, function (search) {
              var url = getInternalURLState(this);
              search = String(search);
              if (search == '') {
                url.query = null;
              } else {
                if ('?' == search.charAt(0)) search = search.slice(1);
                url.query = '';
                parseURL(url, search, QUERY);
              }
              getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);
            }),
            // `URL.prototype.searchParams` getter
            // https://url.spec.whatwg.org/#dom-url-searchparams
            searchParams: accessorDescriptor(getSearchParams),
            // `URL.prototype.hash` accessors pair
            // https://url.spec.whatwg.org/#dom-url-hash
            hash: accessorDescriptor(getHash, function (hash) {
              var url = getInternalURLState(this);
              hash = String(hash);
              if (hash == '') {
                url.fragment = null;
                return;
              }
              if ('#' == hash.charAt(0)) hash = hash.slice(1);
              url.fragment = '';
              parseURL(url, hash, FRAGMENT);
            })
          });
        }

        // `URL.prototype.toJSON` method
        // https://url.spec.whatwg.org/#dom-url-tojson
        redefine(URLPrototype, 'toJSON', function toJSON() {
          return serializeURL.call(this);
        }, { enumerable: true });

        // `URL.prototype.toString` method
        // https://url.spec.whatwg.org/#URL-stringification-behavior
        redefine(URLPrototype, 'toString', function toString() {
          return serializeURL.call(this);
        }, { enumerable: true });

        if (NativeURL) {
          var nativeCreateObjectURL = NativeURL.createObjectURL;
          var nativeRevokeObjectURL = NativeURL.revokeObjectURL;
          // `URL.createObjectURL` method
          // https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL
          // eslint-disable-next-line no-unused-vars -- required for `.length`
          if (nativeCreateObjectURL) redefine(URLConstructor, 'createObjectURL', function createObjectURL(blob) {
            return nativeCreateObjectURL.apply(NativeURL, arguments);
          });
          // `URL.revokeObjectURL` method
          // https://developer.mozilla.org/en-US/docs/Web/API/URL/revokeObjectURL
          // eslint-disable-next-line no-unused-vars -- required for `.length`
          if (nativeRevokeObjectURL) redefine(URLConstructor, 'revokeObjectURL', function revokeObjectURL(url) {
            return nativeRevokeObjectURL.apply(NativeURL, arguments);
          });
        }

        setToStringTag(URLConstructor, 'URL');

        _export({ global: true, forced: !nativeUrl, sham: !descriptors }, {
          URL: URLConstructor
        });

        // `RegExp.prototype.flags` getter implementation
        // https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
        var regexpFlags = function () {
          var that = anObject(this);
          var result = '';
          if (that.global) result += 'g';
          if (that.ignoreCase) result += 'i';
          if (that.multiline) result += 'm';
          if (that.dotAll) result += 's';
          if (that.unicode) result += 'u';
          if (that.sticky) result += 'y';
          return result;
        };

        var TO_STRING = 'toString';
        var RegExpPrototype$2 = RegExp.prototype;
        var nativeToString = RegExpPrototype$2[TO_STRING];

        var NOT_GENERIC = fails(function () { return nativeToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
        // FF44- RegExp#toString has a wrong name
        var INCORRECT_NAME = nativeToString.name != TO_STRING;

        // `RegExp.prototype.toString` method
        // https://tc39.es/ecma262/#sec-regexp.prototype.tostring
        if (NOT_GENERIC || INCORRECT_NAME) {
          redefine(RegExp.prototype, TO_STRING, function toString() {
            var R = anObject(this);
            var p = String(R.source);
            var rf = R.flags;
            var f = String(rf === undefined && R instanceof RegExp && !('flags' in RegExpPrototype$2) ? regexpFlags.call(R) : rf);
            return '/' + p + '/' + f;
          }, { unsafe: true });
        }

        // babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError,
        var RE = function (s, f) {
          return RegExp(s, f);
        };

        var UNSUPPORTED_Y$3 = fails(function () {
          var re = RE('a', 'y');
          re.lastIndex = 2;
          return re.exec('abcd') != null;
        });

        var BROKEN_CARET = fails(function () {
          // https://bugzilla.mozilla.org/show_bug.cgi?id=773687
          var re = RE('^r', 'gy');
          re.lastIndex = 2;
          return re.exec('str') != null;
        });

        var regexpStickyHelpers = {
                UNSUPPORTED_Y: UNSUPPORTED_Y$3,
                BROKEN_CARET: BROKEN_CARET
        };

        var regexpUnsupportedDotAll = fails(function () {
          // babel-minify transpiles RegExp('.', 's') -> /./s and it causes SyntaxError
          var re = RegExp('.', (typeof '').charAt(0));
          return !(re.dotAll && re.exec('\n') && re.flags === 's');
        });

        var regexpUnsupportedNcg = fails(function () {
          // babel-minify transpiles RegExp('.', 'g') -> /./g and it causes SyntaxError
          var re = RegExp('(?<a>b)', (typeof '').charAt(5));
          return re.exec('b').groups.a !== 'b' ||
            'b'.replace(re, '$<a>c') !== 'bc';
        });

        /* eslint-disable regexp/no-assertion-capturing-group, regexp/no-empty-group, regexp/no-lazy-ends -- testing */
        /* eslint-disable regexp/no-useless-quantifier -- testing */




        var getInternalState = internalState.get;



        var nativeExec = RegExp.prototype.exec;
        var nativeReplace = shared('native-string-replace', String.prototype.replace);

        var patchedExec = nativeExec;

        var UPDATES_LAST_INDEX_WRONG = (function () {
          var re1 = /a/;
          var re2 = /b*/g;
          nativeExec.call(re1, 'a');
          nativeExec.call(re2, 'a');
          return re1.lastIndex !== 0 || re2.lastIndex !== 0;
        })();

        var UNSUPPORTED_Y$2 = regexpStickyHelpers.UNSUPPORTED_Y || regexpStickyHelpers.BROKEN_CARET;

        // nonparticipating capturing group, copied from es5-shim's String#split patch.
        var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;

        var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y$2 || regexpUnsupportedDotAll || regexpUnsupportedNcg;

        if (PATCH) {
          // eslint-disable-next-line max-statements -- TODO
          patchedExec = function exec(str) {
            var re = this;
            var state = getInternalState(re);
            var raw = state.raw;
            var result, reCopy, lastIndex, match, i, object, group;

            if (raw) {
              raw.lastIndex = re.lastIndex;
              result = patchedExec.call(raw, str);
              re.lastIndex = raw.lastIndex;
              return result;
            }

            var groups = state.groups;
            var sticky = UNSUPPORTED_Y$2 && re.sticky;
            var flags = regexpFlags.call(re);
            var source = re.source;
            var charsAdded = 0;
            var strCopy = str;

            if (sticky) {
              flags = flags.replace('y', '');
              if (flags.indexOf('g') === -1) {
                flags += 'g';
              }

              strCopy = String(str).slice(re.lastIndex);
              // Support anchored sticky behavior.
              if (re.lastIndex > 0 && (!re.multiline || re.multiline && str[re.lastIndex - 1] !== '\n')) {
                source = '(?: ' + source + ')';
                strCopy = ' ' + strCopy;
                charsAdded++;
              }
              // ^(? + rx + ) is needed, in combination with some str slicing, to
              // simulate the 'y' flag.
              reCopy = new RegExp('^(?:' + source + ')', flags);
            }

            if (NPCG_INCLUDED) {
              reCopy = new RegExp('^' + source + '$(?!\\s)', flags);
            }
            if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;

            match = nativeExec.call(sticky ? reCopy : re, strCopy);

            if (sticky) {
              if (match) {
                match.input = match.input.slice(charsAdded);
                match[0] = match[0].slice(charsAdded);
                match.index = re.lastIndex;
                re.lastIndex += match[0].length;
              } else re.lastIndex = 0;
            } else if (UPDATES_LAST_INDEX_WRONG && match) {
              re.lastIndex = re.global ? match.index + match[0].length : lastIndex;
            }
            if (NPCG_INCLUDED && match && match.length > 1) {
              // Fix browsers whose `exec` methods don't consistently return `undefined`
              // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/
              nativeReplace.call(match[0], reCopy, function () {
                for (i = 1; i < arguments.length - 2; i++) {
                  if (arguments[i] === undefined) match[i] = undefined;
                }
              });
            }

            if (match && groups) {
              match.groups = object = objectCreate(null);
              for (i = 0; i < groups.length; i++) {
                group = groups[i];
                object[group[0]] = match[group[1]];
              }
            }

            return match;
          };
        }

        var regexpExec = patchedExec;

        // `RegExp.prototype.exec` method
        // https://tc39.es/ecma262/#sec-regexp.prototype.exec
        _export({ target: 'RegExp', proto: true, forced: /./.exec !== regexpExec }, {
          exec: regexpExec
        });

        // TODO: Remove from `core-js@4` since it's moved to entry points







        var SPECIES = wellKnownSymbol('species');
        var RegExpPrototype$1 = RegExp.prototype;

        var fixRegexpWellKnownSymbolLogic = function (KEY, exec, FORCED, SHAM) {
          var SYMBOL = wellKnownSymbol(KEY);

          var DELEGATES_TO_SYMBOL = !fails(function () {
            // String methods call symbol-named RegEp methods
            var O = {};
            O[SYMBOL] = function () { return 7; };
            return ''[KEY](O) != 7;
          });

          var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails(function () {
            // Symbol-named RegExp methods call .exec
            var execCalled = false;
            var re = /a/;

            if (KEY === 'split') {
              // We can't use real regex here since it causes deoptimization
              // and serious performance degradation in V8
              // https://github.com/zloirock/core-js/issues/306
              re = {};
              // RegExp[@@split] doesn't call the regex's exec method, but first creates
              // a new one. We need to return the patched regex when creating the new one.
              re.constructor = {};
              re.constructor[SPECIES] = function () { return re; };
              re.flags = '';
              re[SYMBOL] = /./[SYMBOL];
            }

            re.exec = function () { execCalled = true; return null; };

            re[SYMBOL]('');
            return !execCalled;
          });

          if (
            !DELEGATES_TO_SYMBOL ||
            !DELEGATES_TO_EXEC ||
            FORCED
          ) {
            var nativeRegExpMethod = /./[SYMBOL];
            var methods = exec(SYMBOL, ''[KEY], function (nativeMethod, regexp, str, arg2, forceStringMethod) {
              var $exec = regexp.exec;
              if ($exec === regexpExec || $exec === RegExpPrototype$1.exec) {
                if (DELEGATES_TO_SYMBOL && !forceStringMethod) {
                  // The native String method already delegates to @@method (this
                  // polyfilled function), leasing to infinite recursion.
                  // We avoid it by directly calling the native @@method method.
                  return { done: true, value: nativeRegExpMethod.call(regexp, str, arg2) };
                }
                return { done: true, value: nativeMethod.call(str, regexp, arg2) };
              }
              return { done: false };
            });

            redefine(String.prototype, KEY, methods[0]);
            redefine(RegExpPrototype$1, SYMBOL, methods[1]);
          }

          if (SHAM) createNonEnumerableProperty(RegExpPrototype$1[SYMBOL], 'sham', true);
        };

        var charAt = stringMultibyte.charAt;

        // `AdvanceStringIndex` abstract operation
        // https://tc39.es/ecma262/#sec-advancestringindex
        var advanceStringIndex = function (S, index, unicode) {
          return index + (unicode ? charAt(S, index).length : 1);
        };

        var floor$1 = Math.floor;
        var replace = ''.replace;
        var SUBSTITUTION_SYMBOLS = /\$([$&'`]|\d{1,2}|<[^>]*>)/g;
        var SUBSTITUTION_SYMBOLS_NO_NAMED = /\$([$&'`]|\d{1,2})/g;

        // `GetSubstitution` abstract operation
        // https://tc39.es/ecma262/#sec-getsubstitution
        var getSubstitution = function (matched, str, position, captures, namedCaptures, replacement) {
          var tailPos = position + matched.length;
          var m = captures.length;
          var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;
          if (namedCaptures !== undefined) {
            namedCaptures = toObject(namedCaptures);
            symbols = SUBSTITUTION_SYMBOLS;
          }
          return replace.call(replacement, symbols, function (match, ch) {
            var capture;
            switch (ch.charAt(0)) {
              case '$': return '$';
              case '&': return matched;
              case '`': return str.slice(0, position);
              case "'": return str.slice(tailPos);
              case '<':
                capture = namedCaptures[ch.slice(1, -1)];
                break;
              default: // \d\d?
                var n = +ch;
                if (n === 0) return match;
                if (n > m) {
                  var f = floor$1(n / 10);
                  if (f === 0) return match;
                  if (f <= m) return captures[f - 1] === undefined ? ch.charAt(1) : captures[f - 1] + ch.charAt(1);
                  return match;
                }
                capture = captures[n - 1];
            }
            return capture === undefined ? '' : capture;
          });
        };

        // `RegExpExec` abstract operation
        // https://tc39.es/ecma262/#sec-regexpexec
        var regexpExecAbstract = function (R, S) {
          var exec = R.exec;
          if (typeof exec === 'function') {
            var result = exec.call(R, S);
            if (typeof result !== 'object') {
              throw TypeError('RegExp exec method returned something other than an Object or null');
            }
            return result;
          }

          if (classofRaw(R) !== 'RegExp') {
            throw TypeError('RegExp#exec called on incompatible receiver');
          }

          return regexpExec.call(R, S);
        };

        var REPLACE = wellKnownSymbol('replace');
        var max$2 = Math.max;
        var min$5 = Math.min;

        var maybeToString = function (it) {
          return it === undefined ? it : String(it);
        };

        // IE <= 11 replaces $0 with the whole match, as if it was $&
        // https://stackoverflow.com/questions/6024666/getting-ie-to-replace-a-regex-with-the-literal-string-0
        var REPLACE_KEEPS_$0 = (function () {
          // eslint-disable-next-line regexp/prefer-escape-replacement-dollar-char -- required for testing
          return 'a'.replace(/./, '$0') === '$0';
        })();

        // Safari <= 13.0.3(?) substitutes nth capture where n>m with an empty string
        var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = (function () {
          if (/./[REPLACE]) {
            return /./[REPLACE]('a', '$0') === '';
          }
          return false;
        })();

        var REPLACE_SUPPORTS_NAMED_GROUPS = !fails(function () {
          var re = /./;
          re.exec = function () {
            var result = [];
            result.groups = { a: '7' };
            return result;
          };
          return ''.replace(re, '$<a>') !== '7';
        });

        // @@replace logic
        fixRegexpWellKnownSymbolLogic('replace', function (_, nativeReplace, maybeCallNative) {
          var UNSAFE_SUBSTITUTE = REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE ? '$' : '$0';

          return [
            // `String.prototype.replace` method
            // https://tc39.es/ecma262/#sec-string.prototype.replace
            function replace(searchValue, replaceValue) {
              var O = requireObjectCoercible(this);
              var replacer = searchValue == undefined ? undefined : searchValue[REPLACE];
              return replacer !== undefined
                ? replacer.call(searchValue, O, replaceValue)
                : nativeReplace.call(String(O), searchValue, replaceValue);
            },
            // `RegExp.prototype[@@replace]` method
            // https://tc39.es/ecma262/#sec-regexp.prototype-@@replace
            function (string, replaceValue) {
              if (
                typeof replaceValue === 'string' &&
                replaceValue.indexOf(UNSAFE_SUBSTITUTE) === -1 &&
                replaceValue.indexOf('$<') === -1
              ) {
                var res = maybeCallNative(nativeReplace, this, string, replaceValue);
                if (res.done) return res.value;
              }

              var rx = anObject(this);
              var S = String(string);

              var functionalReplace = typeof replaceValue === 'function';
              if (!functionalReplace) replaceValue = String(replaceValue);

              var global = rx.global;
              if (global) {
                var fullUnicode = rx.unicode;
                rx.lastIndex = 0;
              }
              var results = [];
              while (true) {
                var result = regexpExecAbstract(rx, S);
                if (result === null) break;

                results.push(result);
                if (!global) break;

                var matchStr = String(result[0]);
                if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);
              }

              var accumulatedResult = '';
              var nextSourcePosition = 0;
              for (var i = 0; i < results.length; i++) {
                result = results[i];

                var matched = String(result[0]);
                var position = max$2(min$5(toInteger(result.index), S.length), 0);
                var captures = [];
                // NOTE: This is equivalent to
                //   captures = result.slice(1).map(maybeToString)
                // but for some reason `nativeSlice.call(result, 1, result.length)` (called in
                // the slice polyfill when slicing native arrays) "doesn't work" in safari 9 and
                // causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.
                for (var j = 1; j < result.length; j++) captures.push(maybeToString(result[j]));
                var namedCaptures = result.groups;
                if (functionalReplace) {
                  var replacerArgs = [matched].concat(captures, position, S);
                  if (namedCaptures !== undefined) replacerArgs.push(namedCaptures);
                  var replacement = String(replaceValue.apply(undefined, replacerArgs));
                } else {
                  replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);
                }
                if (position >= nextSourcePosition) {
                  accumulatedResult += S.slice(nextSourcePosition, position) + replacement;
                  nextSourcePosition = position + matched.length;
                }
              }
              return accumulatedResult + S.slice(nextSourcePosition);
            }
          ];
        }, !REPLACE_SUPPORTS_NAMED_GROUPS || !REPLACE_KEEPS_$0 || REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE);

        var MATCH$2 = wellKnownSymbol('match');

        // `IsRegExp` abstract operation
        // https://tc39.es/ecma262/#sec-isregexp
        var isRegexp = function (it) {
          var isRegExp;
          return isObject$4(it) && ((isRegExp = it[MATCH$2]) !== undefined ? !!isRegExp : classofRaw(it) == 'RegExp');
        };

        var UNSUPPORTED_Y$1 = regexpStickyHelpers.UNSUPPORTED_Y;
        var arrayPush = [].push;
        var min$4 = Math.min;
        var MAX_UINT32 = 0xFFFFFFFF;

        // Chrome 51 has a buggy "split" implementation when RegExp#exec !== nativeExec
        // Weex JS has frozen built-in prototypes, so use try / catch wrapper
        var SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = !fails(function () {
          // eslint-disable-next-line regexp/no-empty-group -- required for testing
          var re = /(?:)/;
          var originalExec = re.exec;
          re.exec = function () { return originalExec.apply(this, arguments); };
          var result = 'ab'.split(re);
          return result.length !== 2 || result[0] !== 'a' || result[1] !== 'b';
        });

        // @@split logic
        fixRegexpWellKnownSymbolLogic('split', function (SPLIT, nativeSplit, maybeCallNative) {
          var internalSplit;
          if (
            'abbc'.split(/(b)*/)[1] == 'c' ||
            // eslint-disable-next-line regexp/no-empty-group -- required for testing
            'test'.split(/(?:)/, -1).length != 4 ||
            'ab'.split(/(?:ab)*/).length != 2 ||
            '.'.split(/(.?)(.?)/).length != 4 ||
            // eslint-disable-next-line regexp/no-assertion-capturing-group, regexp/no-empty-group -- required for testing
            '.'.split(/()()/).length > 1 ||
            ''.split(/.?/).length
          ) {
            // based on es5-shim implementation, need to rework it
            internalSplit = function (separator, limit) {
              var string = String(requireObjectCoercible(this));
              var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
              if (lim === 0) return [];
              if (separator === undefined) return [string];
              // If `separator` is not a regex, use native split
              if (!isRegexp(separator)) {
                return nativeSplit.call(string, separator, lim);
              }
              var output = [];
              var flags = (separator.ignoreCase ? 'i' : '') +
                          (separator.multiline ? 'm' : '') +
                          (separator.unicode ? 'u' : '') +
                          (separator.sticky ? 'y' : '');
              var lastLastIndex = 0;
              // Make `global` and avoid `lastIndex` issues by working with a copy
              var separatorCopy = new RegExp(separator.source, flags + 'g');
              var match, lastIndex, lastLength;
              while (match = regexpExec.call(separatorCopy, string)) {
                lastIndex = separatorCopy.lastIndex;
                if (lastIndex > lastLastIndex) {
                  output.push(string.slice(lastLastIndex, match.index));
                  if (match.length > 1 && match.index < string.length) arrayPush.apply(output, match.slice(1));
                  lastLength = match[0].length;
                  lastLastIndex = lastIndex;
                  if (output.length >= lim) break;
                }
                if (separatorCopy.lastIndex === match.index) separatorCopy.lastIndex++; // Avoid an infinite loop
              }
              if (lastLastIndex === string.length) {
                if (lastLength || !separatorCopy.test('')) output.push('');
              } else output.push(string.slice(lastLastIndex));
              return output.length > lim ? output.slice(0, lim) : output;
            };
          // Chakra, V8
          } else if ('0'.split(undefined, 0).length) {
            internalSplit = function (separator, limit) {
              return separator === undefined && limit === 0 ? [] : nativeSplit.call(this, separator, limit);
            };
          } else internalSplit = nativeSplit;

          return [
            // `String.prototype.split` method
            // https://tc39.es/ecma262/#sec-string.prototype.split
            function split(separator, limit) {
              var O = requireObjectCoercible(this);
              var splitter = separator == undefined ? undefined : separator[SPLIT];
              return splitter !== undefined
                ? splitter.call(separator, O, limit)
                : internalSplit.call(String(O), separator, limit);
            },
            // `RegExp.prototype[@@split]` method
            // https://tc39.es/ecma262/#sec-regexp.prototype-@@split
            //
            // NOTE: This cannot be properly polyfilled in engines that don't support
            // the 'y' flag.
            function (string, limit) {
              var res = maybeCallNative(internalSplit, this, string, limit, internalSplit !== nativeSplit);
              if (res.done) return res.value;

              var rx = anObject(this);
              var S = String(string);
              var C = speciesConstructor(rx, RegExp);

              var unicodeMatching = rx.unicode;
              var flags = (rx.ignoreCase ? 'i' : '') +
                          (rx.multiline ? 'm' : '') +
                          (rx.unicode ? 'u' : '') +
                          (UNSUPPORTED_Y$1 ? 'g' : 'y');

              // ^(? + rx + ) is needed, in combination with some S slicing, to
              // simulate the 'y' flag.
              var splitter = new C(UNSUPPORTED_Y$1 ? '^(?:' + rx.source + ')' : rx, flags);
              var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
              if (lim === 0) return [];
              if (S.length === 0) return regexpExecAbstract(splitter, S) === null ? [S] : [];
              var p = 0;
              var q = 0;
              var A = [];
              while (q < S.length) {
                splitter.lastIndex = UNSUPPORTED_Y$1 ? 0 : q;
                var z = regexpExecAbstract(splitter, UNSUPPORTED_Y$1 ? S.slice(q) : S);
                var e;
                if (
                  z === null ||
                  (e = min$4(toLength(splitter.lastIndex + (UNSUPPORTED_Y$1 ? q : 0)), S.length)) === p
                ) {
                  q = advanceStringIndex(S, q, unicodeMatching);
                } else {
                  A.push(S.slice(p, q));
                  if (A.length === lim) return A;
                  for (var i = 1; i <= z.length - 1; i++) {
                    A.push(z[i]);
                    if (A.length === lim) return A;
                  }
                  q = p = e;
                }
              }
              A.push(S.slice(p));
              return A;
            }
          ];
        }, !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC, UNSUPPORTED_Y$1);

        // a string of all valid unicode whitespaces
        var whitespaces = '\u0009\u000A\u000B\u000C\u000D\u0020\u00A0\u1680\u2000\u2001\u2002' +
          '\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF';

        var whitespace = '[' + whitespaces + ']';
        var ltrim = RegExp('^' + whitespace + whitespace + '*');
        var rtrim$2 = RegExp(whitespace + whitespace + '*$');

        // `String.prototype.{ trim, trimStart, trimEnd, trimLeft, trimRight }` methods implementation
        var createMethod$2 = function (TYPE) {
          return function ($this) {
            var string = String(requireObjectCoercible($this));
            if (TYPE & 1) string = string.replace(ltrim, '');
            if (TYPE & 2) string = string.replace(rtrim$2, '');
            return string;
          };
        };

        var stringTrim = {
          // `String.prototype.{ trimLeft, trimStart }` methods
          // https://tc39.es/ecma262/#sec-string.prototype.trimstart
          start: createMethod$2(1),
          // `String.prototype.{ trimRight, trimEnd }` methods
          // https://tc39.es/ecma262/#sec-string.prototype.trimend
          end: createMethod$2(2),
          // `String.prototype.trim` method
          // https://tc39.es/ecma262/#sec-string.prototype.trim
          trim: createMethod$2(3)
        };

        var non = '\u200B\u0085\u180E';

        // check that a method works with the correct list
        // of whitespaces and has a correct name
        var stringTrimForced = function (METHOD_NAME) {
          return fails(function () {
            return !!whitespaces[METHOD_NAME]() || non[METHOD_NAME]() != non || whitespaces[METHOD_NAME].name !== METHOD_NAME;
          });
        };

        var $trim = stringTrim.trim;


        // `String.prototype.trim` method
        // https://tc39.es/ecma262/#sec-string.prototype.trim
        _export({ target: 'String', proto: true, forced: stringTrimForced('trim') }, {
          trim: function trim() {
            return $trim(this);
          }
        });

        var defineProperty$3 = objectDefineProperty.f;

        var FunctionPrototype = Function.prototype;
        var FunctionPrototypeToString = FunctionPrototype.toString;
        var nameRE = /^\s*function ([^ (]*)/;
        var NAME = 'name';

        // Function instances `.name` property
        // https://tc39.es/ecma262/#sec-function-instances-name
        if (descriptors && !(NAME in FunctionPrototype)) {
          defineProperty$3(FunctionPrototype, NAME, {
            configurable: true,
            get: function () {
              try {
                return FunctionPrototypeToString.call(this).match(nameRE)[1];
              } catch (error) {
                return '';
              }
            }
          });
        }

        // `Object.create` method
        // https://tc39.es/ecma262/#sec-object.create
        _export({ target: 'Object', stat: true, sham: !descriptors }, {
          create: objectCreate
        });

        var slice$3 = [].slice;
        var MSIE = /MSIE .\./.test(engineUserAgent); // <- dirty ie9- check

        var wrap$1 = function (scheduler) {
          return function (handler, timeout /* , ...arguments */) {
            var boundArgs = arguments.length > 2;
            var args = boundArgs ? slice$3.call(arguments, 2) : undefined;
            return scheduler(boundArgs ? function () {
              // eslint-disable-next-line no-new-func -- spec requirement
              (typeof handler == 'function' ? handler : Function(handler)).apply(this, args);
            } : handler, timeout);
          };
        };

        // ie9- setTimeout & setInterval additional parameters fix
        // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#timers
        _export({ global: true, bind: true, forced: MSIE }, {
          // `setTimeout` method
          // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-settimeout
          setTimeout: wrap$1(global$2.setTimeout),
          // `setInterval` method
          // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-setinterval
          setInterval: wrap$1(global$2.setInterval)
        });

        var global$1 = typeof globalThis !== 'undefined' && globalThis || typeof self !== 'undefined' && self || typeof global$1 !== 'undefined' && global$1;
        var support = {
          searchParams: 'URLSearchParams' in global$1,
          iterable: 'Symbol' in global$1 && 'iterator' in Symbol,
          blob: 'FileReader' in global$1 && 'Blob' in global$1 && function () {
            try {
              new Blob();
              return true;
            } catch (e) {
              return false;
            }
          }(),
          formData: 'FormData' in global$1,
          arrayBuffer: 'ArrayBuffer' in global$1
        };

        function isDataView(obj) {
          return obj && DataView.prototype.isPrototypeOf(obj);
        }

        if (support.arrayBuffer) {
          var viewClasses = ['[object Int8Array]', '[object Uint8Array]', '[object Uint8ClampedArray]', '[object Int16Array]', '[object Uint16Array]', '[object Int32Array]', '[object Uint32Array]', '[object Float32Array]', '[object Float64Array]'];

          var isArrayBufferView = ArrayBuffer.isView || function (obj) {
            return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1;
          };
        }

        function normalizeName(name) {
          if (typeof name !== 'string') {
            name = String(name);
          }

          if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
            throw new TypeError('Invalid character in header field name: "' + name + '"');
          }

          return name.toLowerCase();
        }

        function normalizeValue(value) {
          if (typeof value !== 'string') {
            value = String(value);
          }

          return value;
        } // Build a destructive iterator for the value list


        function iteratorFor(items) {
          var iterator = {
            next: function next() {
              var value = items.shift();
              return {
                done: value === undefined,
                value: value
              };
            }
          };

          if (support.iterable) {
            iterator[Symbol.iterator] = function () {
              return iterator;
            };
          }

          return iterator;
        }

        function Headers(headers) {
          this.map = {};

          if (headers instanceof Headers) {
            headers.forEach(function (value, name) {
              this.append(name, value);
            }, this);
          } else if (Array.isArray(headers)) {
            headers.forEach(function (header) {
              this.append(header[0], header[1]);
            }, this);
          } else if (headers) {
            Object.getOwnPropertyNames(headers).forEach(function (name) {
              this.append(name, headers[name]);
            }, this);
          }
        }

        Headers.prototype.append = function (name, value) {
          name = normalizeName(name);
          value = normalizeValue(value);
          var oldValue = this.map[name];
          this.map[name] = oldValue ? oldValue + ', ' + value : value;
        };

        Headers.prototype['delete'] = function (name) {
          delete this.map[normalizeName(name)];
        };

        Headers.prototype.get = function (name) {
          name = normalizeName(name);
          return this.has(name) ? this.map[name] : null;
        };

        Headers.prototype.has = function (name) {
          return this.map.hasOwnProperty(normalizeName(name));
        };

        Headers.prototype.set = function (name, value) {
          this.map[normalizeName(name)] = normalizeValue(value);
        };

        Headers.prototype.forEach = function (callback, thisArg) {
          for (var name in this.map) {
            if (this.map.hasOwnProperty(name)) {
              callback.call(thisArg, this.map[name], name, this);
            }
          }
        };

        Headers.prototype.keys = function () {
          var items = [];
          this.forEach(function (value, name) {
            items.push(name);
          });
          return iteratorFor(items);
        };

        Headers.prototype.values = function () {
          var items = [];
          this.forEach(function (value) {
            items.push(value);
          });
          return iteratorFor(items);
        };

        Headers.prototype.entries = function () {
          var items = [];
          this.forEach(function (value, name) {
            items.push([name, value]);
          });
          return iteratorFor(items);
        };

        if (support.iterable) {
          Headers.prototype[Symbol.iterator] = Headers.prototype.entries;
        }

        function consumed(body) {
          if (body.bodyUsed) {
            return Promise.reject(new TypeError('Already read'));
          }

          body.bodyUsed = true;
        }

        function fileReaderReady(reader) {
          return new Promise(function (resolve, reject) {
            reader.onload = function () {
              resolve(reader.result);
            };

            reader.onerror = function () {
              reject(reader.error);
            };
          });
        }

        function readBlobAsArrayBuffer(blob) {
          var reader = new FileReader();
          var promise = fileReaderReady(reader);
          reader.readAsArrayBuffer(blob);
          return promise;
        }

        function readBlobAsText(blob) {
          var reader = new FileReader();
          var promise = fileReaderReady(reader);
          reader.readAsText(blob);
          return promise;
        }

        function readArrayBufferAsText(buf) {
          var view = new Uint8Array(buf);
          var chars = new Array(view.length);

          for (var i = 0; i < view.length; i++) {
            chars[i] = String.fromCharCode(view[i]);
          }

          return chars.join('');
        }

        function bufferClone(buf) {
          if (buf.slice) {
            return buf.slice(0);
          } else {
            var view = new Uint8Array(buf.byteLength);
            view.set(new Uint8Array(buf));
            return view.buffer;
          }
        }

        function Body() {
          this.bodyUsed = false;

          this._initBody = function (body) {
            /*
              fetch-mock wraps the Response object in an ES6 Proxy to
              provide useful test harness features such as flush. However, on
              ES5 browsers without fetch or Proxy support pollyfills must be used;
              the proxy-pollyfill is unable to proxy an attribute unless it exists
              on the object before the Proxy is created. This change ensures
              Response.bodyUsed exists on the instance, while maintaining the
              semantic of setting Request.bodyUsed in the constructor before
              _initBody is called.
            */
            this.bodyUsed = this.bodyUsed;
            this._bodyInit = body;

            if (!body) {
              this._bodyText = '';
            } else if (typeof body === 'string') {
              this._bodyText = body;
            } else if (support.blob && Blob.prototype.isPrototypeOf(body)) {
              this._bodyBlob = body;
            } else if (support.formData && FormData.prototype.isPrototypeOf(body)) {
              this._bodyFormData = body;
            } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
              this._bodyText = body.toString();
            } else if (support.arrayBuffer && support.blob && isDataView(body)) {
              this._bodyArrayBuffer = bufferClone(body.buffer); // IE 10-11 can't handle a DataView body.

              this._bodyInit = new Blob([this._bodyArrayBuffer]);
            } else if (support.arrayBuffer && (ArrayBuffer.prototype.isPrototypeOf(body) || isArrayBufferView(body))) {
              this._bodyArrayBuffer = bufferClone(body);
            } else {
              this._bodyText = body = Object.prototype.toString.call(body);
            }

            if (!this.headers.get('content-type')) {
              if (typeof body === 'string') {
                this.headers.set('content-type', 'text/plain;charset=UTF-8');
              } else if (this._bodyBlob && this._bodyBlob.type) {
                this.headers.set('content-type', this._bodyBlob.type);
              } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
                this.headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
              }
            }
          };

          if (support.blob) {
            this.blob = function () {
              var rejected = consumed(this);

              if (rejected) {
                return rejected;
              }

              if (this._bodyBlob) {
                return Promise.resolve(this._bodyBlob);
              } else if (this._bodyArrayBuffer) {
                return Promise.resolve(new Blob([this._bodyArrayBuffer]));
              } else if (this._bodyFormData) {
                throw new Error('could not read FormData body as blob');
              } else {
                return Promise.resolve(new Blob([this._bodyText]));
              }
            };

            this.arrayBuffer = function () {
              if (this._bodyArrayBuffer) {
                var isConsumed = consumed(this);

                if (isConsumed) {
                  return isConsumed;
                }

                if (ArrayBuffer.isView(this._bodyArrayBuffer)) {
                  return Promise.resolve(this._bodyArrayBuffer.buffer.slice(this._bodyArrayBuffer.byteOffset, this._bodyArrayBuffer.byteOffset + this._bodyArrayBuffer.byteLength));
                } else {
                  return Promise.resolve(this._bodyArrayBuffer);
                }
              } else {
                return this.blob().then(readBlobAsArrayBuffer);
              }
            };
          }

          this.text = function () {
            var rejected = consumed(this);

            if (rejected) {
              return rejected;
            }

            if (this._bodyBlob) {
              return readBlobAsText(this._bodyBlob);
            } else if (this._bodyArrayBuffer) {
              return Promise.resolve(readArrayBufferAsText(this._bodyArrayBuffer));
            } else if (this._bodyFormData) {
              throw new Error('could not read FormData body as text');
            } else {
              return Promise.resolve(this._bodyText);
            }
          };

          if (support.formData) {
            this.formData = function () {
              return this.text().then(decode);
            };
          }

          this.json = function () {
            return this.text().then(JSON.parse);
          };

          return this;
        } // HTTP methods whose capitalization should be normalized


        var methods = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT'];

        function normalizeMethod(method) {
          var upcased = method.toUpperCase();
          return methods.indexOf(upcased) > -1 ? upcased : method;
        }

        function Request(input, options) {
          if (!(this instanceof Request)) {
            throw new TypeError('Please use the "new" operator, this DOM object constructor cannot be called as a function.');
          }

          options = options || {};
          var body = options.body;

          if (input instanceof Request) {
            if (input.bodyUsed) {
              throw new TypeError('Already read');
            }

            this.url = input.url;
            this.credentials = input.credentials;

            if (!options.headers) {
              this.headers = new Headers(input.headers);
            }

            this.method = input.method;
            this.mode = input.mode;
            this.signal = input.signal;

            if (!body && input._bodyInit != null) {
              body = input._bodyInit;
              input.bodyUsed = true;
            }
          } else {
            this.url = String(input);
          }

          this.credentials = options.credentials || this.credentials || 'same-origin';

          if (options.headers || !this.headers) {
            this.headers = new Headers(options.headers);
          }

          this.method = normalizeMethod(options.method || this.method || 'GET');
          this.mode = options.mode || this.mode || null;
          this.signal = options.signal || this.signal;
          this.referrer = null;

          if ((this.method === 'GET' || this.method === 'HEAD') && body) {
            throw new TypeError('Body not allowed for GET or HEAD requests');
          }

          this._initBody(body);

          if (this.method === 'GET' || this.method === 'HEAD') {
            if (options.cache === 'no-store' || options.cache === 'no-cache') {
              // Search for a '_' parameter in the query string
              var reParamSearch = /([?&])_=[^&]*/;

              if (reParamSearch.test(this.url)) {
                // If it already exists then set the value with the current time
                this.url = this.url.replace(reParamSearch, '$1_=' + new Date().getTime());
              } else {
                // Otherwise add a new '_' parameter to the end with the current time
                var reQueryString = /\?/;
                this.url += (reQueryString.test(this.url) ? '&' : '?') + '_=' + new Date().getTime();
              }
            }
          }
        }

        Request.prototype.clone = function () {
          return new Request(this, {
            body: this._bodyInit
          });
        };

        function decode(body) {
          var form = new FormData();
          body.trim().split('&').forEach(function (bytes) {
            if (bytes) {
              var split = bytes.split('=');
              var name = split.shift().replace(/\+/g, ' ');
              var value = split.join('=').replace(/\+/g, ' ');
              form.append(decodeURIComponent(name), decodeURIComponent(value));
            }
          });
          return form;
        }

        function parseHeaders(rawHeaders) {
          var headers = new Headers(); // Replace instances of \r\n and \n followed by at least one space or horizontal tab with a space
          // https://tools.ietf.org/html/rfc7230#section-3.2

          var preProcessedHeaders = rawHeaders.replace(/\r?\n[\t ]+/g, ' '); // Avoiding split via regex to work around a common IE11 bug with the core-js 3.6.0 regex polyfill
          // https://github.com/github/fetch/issues/748
          // https://github.com/zloirock/core-js/issues/751

          preProcessedHeaders.split('\r').map(function (header) {
            return header.indexOf('\n') === 0 ? header.substr(1, header.length) : header;
          }).forEach(function (line) {
            var parts = line.split(':');
            var key = parts.shift().trim();

            if (key) {
              var value = parts.join(':').trim();
              headers.append(key, value);
            }
          });
          return headers;
        }

        Body.call(Request.prototype);
        function Response(bodyInit, options) {
          if (!(this instanceof Response)) {
            throw new TypeError('Please use the "new" operator, this DOM object constructor cannot be called as a function.');
          }

          if (!options) {
            options = {};
          }

          this.type = 'default';
          this.status = options.status === undefined ? 200 : options.status;
          this.ok = this.status >= 200 && this.status < 300;
          this.statusText = options.statusText === undefined ? '' : '' + options.statusText;
          this.headers = new Headers(options.headers);
          this.url = options.url || '';

          this._initBody(bodyInit);
        }
        Body.call(Response.prototype);

        Response.prototype.clone = function () {
          return new Response(this._bodyInit, {
            status: this.status,
            statusText: this.statusText,
            headers: new Headers(this.headers),
            url: this.url
          });
        };

        Response.error = function () {
          var response = new Response(null, {
            status: 0,
            statusText: ''
          });
          response.type = 'error';
          return response;
        };

        var redirectStatuses = [301, 302, 303, 307, 308];

        Response.redirect = function (url, status) {
          if (redirectStatuses.indexOf(status) === -1) {
            throw new RangeError('Invalid status code');
          }

          return new Response(null, {
            status: status,
            headers: {
              location: url
            }
          });
        };

        var DOMException$1 = global$1.DOMException;

        try {
          new DOMException$1();
        } catch (err) {
          DOMException$1 = function DOMException(message, name) {
            this.message = message;
            this.name = name;
            var error = Error(message);
            this.stack = error.stack;
          };

          DOMException$1.prototype = Object.create(Error.prototype);
          DOMException$1.prototype.constructor = DOMException$1;
        }

        function fetch$1(input, init) {
          return new Promise(function (resolve, reject) {
            var request = new Request(input, init);

            if (request.signal && request.signal.aborted) {
              return reject(new DOMException$1('Aborted', 'AbortError'));
            }

            var xhr = new XMLHttpRequest();

            function abortXhr() {
              xhr.abort();
            }

            xhr.onload = function () {
              var options = {
                status: xhr.status,
                statusText: xhr.statusText,
                headers: parseHeaders(xhr.getAllResponseHeaders() || '')
              };
              options.url = 'responseURL' in xhr ? xhr.responseURL : options.headers.get('X-Request-URL');
              var body = 'response' in xhr ? xhr.response : xhr.responseText;
              setTimeout(function () {
                resolve(new Response(body, options));
              }, 0);
            };

            xhr.onerror = function () {
              setTimeout(function () {
                reject(new TypeError('Network request failed'));
              }, 0);
            };

            xhr.ontimeout = function () {
              setTimeout(function () {
                reject(new TypeError('Network request failed'));
              }, 0);
            };

            xhr.onabort = function () {
              setTimeout(function () {
                reject(new DOMException$1('Aborted', 'AbortError'));
              }, 0);
            };

            function fixUrl(url) {
              try {
                return url === '' && global$1.location.href ? global$1.location.href : url;
              } catch (e) {
                return url;
              }
            }

            xhr.open(request.method, fixUrl(request.url), true);

            if (request.credentials === 'include') {
              xhr.withCredentials = true;
            } else if (request.credentials === 'omit') {
              xhr.withCredentials = false;
            }

            if ('responseType' in xhr) {
              if (support.blob) {
                xhr.responseType = 'blob';
              } else if (support.arrayBuffer && request.headers.get('Content-Type') && request.headers.get('Content-Type').indexOf('application/octet-stream') !== -1) {
                xhr.responseType = 'arraybuffer';
              }
            }

            if (init && _typeof(init.headers) === 'object' && !(init.headers instanceof Headers)) {
              Object.getOwnPropertyNames(init.headers).forEach(function (name) {
                xhr.setRequestHeader(name, normalizeValue(init.headers[name]));
              });
            } else {
              request.headers.forEach(function (value, name) {
                xhr.setRequestHeader(name, value);
              });
            }

            if (request.signal) {
              request.signal.addEventListener('abort', abortXhr);

              xhr.onreadystatechange = function () {
                // DONE (success or failure)
                if (xhr.readyState === 4) {
                  request.signal.removeEventListener('abort', abortXhr);
                }
              };
            }

            xhr.send(typeof request._bodyInit === 'undefined' ? null : request._bodyInit);
          });
        }
        fetch$1.polyfill = true;

        if (!global$1.fetch) {
          global$1.fetch = fetch$1;
          global$1.Headers = Headers;
          global$1.Request = Request;
          global$1.Response = Response;
        }

        // `Object.defineProperty` method
        // https://tc39.es/ecma262/#sec-object.defineproperty
        _export({ target: 'Object', stat: true, forced: !descriptors, sham: !descriptors }, {
          defineProperty: objectDefineProperty.f
        });

        // `Object.setPrototypeOf` method
        // https://tc39.es/ecma262/#sec-object.setprototypeof
        _export({ target: 'Object', stat: true }, {
          setPrototypeOf: objectSetPrototypeOf
        });

        var FAILS_ON_PRIMITIVES$3 = fails(function () { objectGetPrototypeOf(1); });

        // `Object.getPrototypeOf` method
        // https://tc39.es/ecma262/#sec-object.getprototypeof
        _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$3, sham: !correctPrototypeGetter }, {
          getPrototypeOf: function getPrototypeOf(it) {
            return objectGetPrototypeOf(toObject(it));
          }
        });

        var slice$2 = [].slice;
        var factories = {};

        var construct = function (C, argsLength, args) {
          if (!(argsLength in factories)) {
            for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']';
            // eslint-disable-next-line no-new-func -- we have no proper alternatives, IE8- only
            factories[argsLength] = Function('C,a', 'return new C(' + list.join(',') + ')');
          } return factories[argsLength](C, args);
        };

        // `Function.prototype.bind` method implementation
        // https://tc39.es/ecma262/#sec-function.prototype.bind
        var functionBind = Function.bind || function bind(that /* , ...args */) {
          var fn = aFunction(this);
          var partArgs = slice$2.call(arguments, 1);
          var boundFunction = function bound(/* args... */) {
            var args = partArgs.concat(slice$2.call(arguments));
            return this instanceof boundFunction ? construct(fn, args.length, args) : fn.apply(that, args);
          };
          if (isObject$4(fn.prototype)) boundFunction.prototype = fn.prototype;
          return boundFunction;
        };

        var nativeConstruct = getBuiltIn('Reflect', 'construct');

        // `Reflect.construct` method
        // https://tc39.es/ecma262/#sec-reflect.construct
        // MS Edge supports only 2 arguments and argumentsList argument is optional
        // FF Nightly sets third argument as `new.target`, but does not create `this` from it
        var NEW_TARGET_BUG = fails(function () {
          function F() { /* empty */ }
          return !(nativeConstruct(function () { /* empty */ }, [], F) instanceof F);
        });
        var ARGS_BUG = !fails(function () {
          nativeConstruct(function () { /* empty */ });
        });
        var FORCED$a = NEW_TARGET_BUG || ARGS_BUG;

        _export({ target: 'Reflect', stat: true, forced: FORCED$a, sham: FORCED$a }, {
          construct: function construct(Target, args /* , newTarget */) {
            aFunction(Target);
            anObject(args);
            var newTarget = arguments.length < 3 ? Target : aFunction(arguments[2]);
            if (ARGS_BUG && !NEW_TARGET_BUG) return nativeConstruct(Target, args, newTarget);
            if (Target == newTarget) {
              // w/o altered newTarget, optimization for 0-4 arguments
              switch (args.length) {
                case 0: return new Target();
                case 1: return new Target(args[0]);
                case 2: return new Target(args[0], args[1]);
                case 3: return new Target(args[0], args[1], args[2]);
                case 4: return new Target(args[0], args[1], args[2], args[3]);
              }
              // w/o altered newTarget, lot of arguments case
              var $args = [null];
              $args.push.apply($args, args);
              return new (functionBind.apply(Target, $args))();
            }
            // with altered newTarget, not support built-in constructors
            var proto = newTarget.prototype;
            var instance = objectCreate(isObject$4(proto) ? proto : Object.prototype);
            var result = Function.apply.call(Target, instance, args);
            return isObject$4(result) ? result : instance;
          }
        });

        // `Reflect.get` method
        // https://tc39.es/ecma262/#sec-reflect.get
        function get$3(target, propertyKey /* , receiver */) {
          var receiver = arguments.length < 3 ? target : arguments[2];
          var descriptor, prototype;
          if (anObject(target) === receiver) return target[propertyKey];
          if (descriptor = objectGetOwnPropertyDescriptor.f(target, propertyKey)) return has$1(descriptor, 'value')
            ? descriptor.value
            : descriptor.get === undefined
              ? undefined
              : descriptor.get.call(receiver);
          if (isObject$4(prototype = objectGetPrototypeOf(target))) return get$3(prototype, propertyKey, receiver);
        }

        _export({ target: 'Reflect', stat: true }, {
          get: get$3
        });

        var nativeGetOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;


        var FAILS_ON_PRIMITIVES$2 = fails(function () { nativeGetOwnPropertyDescriptor(1); });
        var FORCED$9 = !descriptors || FAILS_ON_PRIMITIVES$2;

        // `Object.getOwnPropertyDescriptor` method
        // https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
        _export({ target: 'Object', stat: true, forced: FORCED$9, sham: !descriptors }, {
          getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {
            return nativeGetOwnPropertyDescriptor(toIndexedObject(it), key);
          }
        });

        var HAS_SPECIES_SUPPORT$1 = arrayMethodHasSpeciesSupport('splice');

        var max$1 = Math.max;
        var min$3 = Math.min;
        var MAX_SAFE_INTEGER$1 = 0x1FFFFFFFFFFFFF;
        var MAXIMUM_ALLOWED_LENGTH_EXCEEDED = 'Maximum allowed length exceeded';

        // `Array.prototype.splice` method
        // https://tc39.es/ecma262/#sec-array.prototype.splice
        // with adding support of @@species
        _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$1 }, {
          splice: function splice(start, deleteCount /* , ...items */) {
            var O = toObject(this);
            var len = toLength(O.length);
            var actualStart = toAbsoluteIndex(start, len);
            var argumentsLength = arguments.length;
            var insertCount, actualDeleteCount, A, k, from, to;
            if (argumentsLength === 0) {
              insertCount = actualDeleteCount = 0;
            } else if (argumentsLength === 1) {
              insertCount = 0;
              actualDeleteCount = len - actualStart;
            } else {
              insertCount = argumentsLength - 2;
              actualDeleteCount = min$3(max$1(toInteger(deleteCount), 0), len - actualStart);
            }
            if (len + insertCount - actualDeleteCount > MAX_SAFE_INTEGER$1) {
              throw TypeError(MAXIMUM_ALLOWED_LENGTH_EXCEEDED);
            }
            A = arraySpeciesCreate(O, actualDeleteCount);
            for (k = 0; k < actualDeleteCount; k++) {
              from = actualStart + k;
              if (from in O) createProperty(A, k, O[from]);
            }
            A.length = actualDeleteCount;
            if (insertCount < actualDeleteCount) {
              for (k = actualStart; k < len - actualDeleteCount; k++) {
                from = k + actualDeleteCount;
                to = k + insertCount;
                if (from in O) O[to] = O[from];
                else delete O[to];
              }
              for (k = len; k > len - actualDeleteCount + insertCount; k--) delete O[k - 1];
            } else if (insertCount > actualDeleteCount) {
              for (k = len - actualDeleteCount; k > actualStart; k--) {
                from = k + actualDeleteCount - 1;
                to = k + insertCount - 1;
                if (from in O) O[to] = O[from];
                else delete O[to];
              }
            }
            for (k = 0; k < insertCount; k++) {
              O[k + actualStart] = arguments[k + 2];
            }
            O.length = len - actualDeleteCount + insertCount;
            return A;
          }
        });

        // `Symbol.toStringTag` well-known symbol
        // https://tc39.es/ecma262/#sec-symbol.tostringtag
        defineWellKnownSymbol('toStringTag');

        // JSON[@@toStringTag] property
        // https://tc39.es/ecma262/#sec-json-@@tostringtag
        setToStringTag(global$2.JSON, 'JSON', true);

        // Math[@@toStringTag] property
        // https://tc39.es/ecma262/#sec-math-@@tostringtag
        setToStringTag(Math, 'Math', true);

        (function (factory) {
          factory();
        })(function () {

          function _classCallCheck(instance, Constructor) {
            if (!(instance instanceof Constructor)) {
              throw new TypeError("Cannot call a class as a function");
            }
          }

          function _defineProperties(target, props) {
            for (var i = 0; i < props.length; i++) {
              var descriptor = props[i];
              descriptor.enumerable = descriptor.enumerable || false;
              descriptor.configurable = true;
              if ("value" in descriptor) descriptor.writable = true;
              Object.defineProperty(target, descriptor.key, descriptor);
            }
          }

          function _createClass(Constructor, protoProps, staticProps) {
            if (protoProps) _defineProperties(Constructor.prototype, protoProps);
            if (staticProps) _defineProperties(Constructor, staticProps);
            return Constructor;
          }

          function _inherits(subClass, superClass) {
            if (typeof superClass !== "function" && superClass !== null) {
              throw new TypeError("Super expression must either be null or a function");
            }

            subClass.prototype = Object.create(superClass && superClass.prototype, {
              constructor: {
                value: subClass,
                writable: true,
                configurable: true
              }
            });
            if (superClass) _setPrototypeOf(subClass, superClass);
          }

          function _getPrototypeOf(o) {
            _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
              return o.__proto__ || Object.getPrototypeOf(o);
            };
            return _getPrototypeOf(o);
          }

          function _setPrototypeOf(o, p) {
            _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
              o.__proto__ = p;
              return o;
            };

            return _setPrototypeOf(o, p);
          }

          function _isNativeReflectConstruct() {
            if (typeof Reflect === "undefined" || !Reflect.construct) return false;
            if (Reflect.construct.sham) return false;
            if (typeof Proxy === "function") return true;

            try {
              Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
              return true;
            } catch (e) {
              return false;
            }
          }

          function _assertThisInitialized(self) {
            if (self === void 0) {
              throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
            }

            return self;
          }

          function _possibleConstructorReturn(self, call) {
            if (call && (_typeof(call) === "object" || typeof call === "function")) {
              return call;
            }

            return _assertThisInitialized(self);
          }

          function _createSuper(Derived) {
            var hasNativeReflectConstruct = _isNativeReflectConstruct();

            return function _createSuperInternal() {
              var Super = _getPrototypeOf(Derived),
                  result;

              if (hasNativeReflectConstruct) {
                var NewTarget = _getPrototypeOf(this).constructor;

                result = Reflect.construct(Super, arguments, NewTarget);
              } else {
                result = Super.apply(this, arguments);
              }

              return _possibleConstructorReturn(this, result);
            };
          }

          function _superPropBase(object, property) {
            while (!Object.prototype.hasOwnProperty.call(object, property)) {
              object = _getPrototypeOf(object);
              if (object === null) break;
            }

            return object;
          }

          function _get(target, property, receiver) {
            if (typeof Reflect !== "undefined" && Reflect.get) {
              _get = Reflect.get;
            } else {
              _get = function _get(target, property, receiver) {
                var base = _superPropBase(target, property);

                if (!base) return;
                var desc = Object.getOwnPropertyDescriptor(base, property);

                if (desc.get) {
                  return desc.get.call(receiver);
                }

                return desc.value;
              };
            }

            return _get(target, property, receiver || target);
          }

          var Emitter = /*#__PURE__*/function () {
            function Emitter() {
              _classCallCheck(this, Emitter);

              Object.defineProperty(this, 'listeners', {
                value: {},
                writable: true,
                configurable: true
              });
            }

            _createClass(Emitter, [{
              key: "addEventListener",
              value: function addEventListener(type, callback, options) {
                if (!(type in this.listeners)) {
                  this.listeners[type] = [];
                }

                this.listeners[type].push({
                  callback: callback,
                  options: options
                });
              }
            }, {
              key: "removeEventListener",
              value: function removeEventListener(type, callback) {
                if (!(type in this.listeners)) {
                  return;
                }

                var stack = this.listeners[type];

                for (var i = 0, l = stack.length; i < l; i++) {
                  if (stack[i].callback === callback) {
                    stack.splice(i, 1);
                    return;
                  }
                }
              }
            }, {
              key: "dispatchEvent",
              value: function dispatchEvent(event) {
                if (!(event.type in this.listeners)) {
                  return;
                }

                var stack = this.listeners[event.type];
                var stackToCall = stack.slice();

                for (var i = 0, l = stackToCall.length; i < l; i++) {
                  var listener = stackToCall[i];

                  try {
                    listener.callback.call(this, event);
                  } catch (e) {
                    Promise.resolve().then(function () {
                      throw e;
                    });
                  }

                  if (listener.options && listener.options.once) {
                    this.removeEventListener(event.type, listener.callback);
                  }
                }

                return !event.defaultPrevented;
              }
            }]);

            return Emitter;
          }();

          var AbortSignal = /*#__PURE__*/function (_Emitter) {
            _inherits(AbortSignal, _Emitter);

            var _super = _createSuper(AbortSignal);

            function AbortSignal() {
              var _this;

              _classCallCheck(this, AbortSignal);

              _this = _super.call(this); // Some versions of babel does not transpile super() correctly for IE <= 10, if the parent
              // constructor has failed to run, then "this.listeners" will still be undefined and then we call
              // the parent constructor directly instead as a workaround. For general details, see babel bug:
              // https://github.com/babel/babel/issues/3041
              // This hack was added as a fix for the issue described here:
              // https://github.com/Financial-Times/polyfill-library/pull/59#issuecomment-477558042

              if (!_this.listeners) {
                Emitter.call(_assertThisInitialized(_this));
              } // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
              // we want Object.keys(new AbortController().signal) to be [] for compat with the native impl


              Object.defineProperty(_assertThisInitialized(_this), 'aborted', {
                value: false,
                writable: true,
                configurable: true
              });
              Object.defineProperty(_assertThisInitialized(_this), 'onabort', {
                value: null,
                writable: true,
                configurable: true
              });
              return _this;
            }

            _createClass(AbortSignal, [{
              key: "toString",
              value: function toString() {
                return '[object AbortSignal]';
              }
            }, {
              key: "dispatchEvent",
              value: function dispatchEvent(event) {
                if (event.type === 'abort') {
                  this.aborted = true;

                  if (typeof this.onabort === 'function') {
                    this.onabort.call(this, event);
                  }
                }

                _get(_getPrototypeOf(AbortSignal.prototype), "dispatchEvent", this).call(this, event);
              }
            }]);

            return AbortSignal;
          }(Emitter);

          var AbortController = /*#__PURE__*/function () {
            function AbortController() {
              _classCallCheck(this, AbortController); // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
              // we want Object.keys(new AbortController()) to be [] for compat with the native impl


              Object.defineProperty(this, 'signal', {
                value: new AbortSignal(),
                writable: true,
                configurable: true
              });
            }

            _createClass(AbortController, [{
              key: "abort",
              value: function abort() {
                var event;

                try {
                  event = new Event('abort');
                } catch (e) {
                  if (typeof document !== 'undefined') {
                    if (!document.createEvent) {
                      // For Internet Explorer 8:
                      event = document.createEventObject();
                      event.type = 'abort';
                    } else {
                      // For Internet Explorer 11:
                      event = document.createEvent('Event');
                      event.initEvent('abort', false, false);
                    }
                  } else {
                    // Fallback where document isn't available:
                    event = {
                      type: 'abort',
                      bubbles: false,
                      cancelable: false
                    };
                  }
                }

                this.signal.dispatchEvent(event);
              }
            }, {
              key: "toString",
              value: function toString() {
                return '[object AbortController]';
              }
            }]);

            return AbortController;
          }();

          if (typeof Symbol !== 'undefined' && Symbol.toStringTag) {
            // These are necessary to make sure that we get correct output for:
            // Object.prototype.toString.call(new AbortController())
            AbortController.prototype[Symbol.toStringTag] = 'AbortController';
            AbortSignal.prototype[Symbol.toStringTag] = 'AbortSignal';
          }

          function polyfillNeeded(self) {
            if (self.__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL) {
              console.log('__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL=true is set, will force install polyfill');
              return true;
            } // Note that the "unfetch" minimal fetch polyfill defines fetch() without
            // defining window.Request, and this polyfill need to work on top of unfetch
            // so the below feature detection needs the !self.AbortController part.
            // The Request.prototype check is also needed because Safari versions 11.1.2
            // up to and including 12.1.x has a window.AbortController present but still
            // does NOT correctly implement abortable fetch:
            // https://bugs.webkit.org/show_bug.cgi?id=174980#c2


            return typeof self.Request === 'function' && !self.Request.prototype.hasOwnProperty('signal') || !self.AbortController;
          }
          /**
           * Note: the "fetch.Request" default value is available for fetch imported from
           * the "node-fetch" package and not in browsers. This is OK since browsers
           * will be importing umd-polyfill.js from that path "self" is passed the
           * decorator so the default value will not be used (because browsers that define
           * fetch also has Request). One quirky setup where self.fetch exists but
           * self.Request does not is when the "unfetch" minimal fetch polyfill is used
           * on top of IE11; for this case the browser will try to use the fetch.Request
           * default value which in turn will be undefined but then then "if (Request)"
           * will ensure that you get a patched fetch but still no Request (as expected).
           * @param {fetch, Request = fetch.Request}
           * @returns {fetch: abortableFetch, Request: AbortableRequest}
           */


          function abortableFetchDecorator(patchTargets) {
            if ('function' === typeof patchTargets) {
              patchTargets = {
                fetch: patchTargets
              };
            }

            var _patchTargets = patchTargets,
                fetch = _patchTargets.fetch,
                _patchTargets$Request = _patchTargets.Request,
                NativeRequest = _patchTargets$Request === void 0 ? fetch.Request : _patchTargets$Request,
                NativeAbortController = _patchTargets.AbortController,
                _patchTargets$__FORCE = _patchTargets.__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL,
                __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL = _patchTargets$__FORCE === void 0 ? false : _patchTargets$__FORCE;

            if (!polyfillNeeded({
              fetch: fetch,
              Request: NativeRequest,
              AbortController: NativeAbortController,
              __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL: __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL
            })) {
              return {
                fetch: fetch,
                Request: Request
              };
            }

            var Request = NativeRequest; // Note that the "unfetch" minimal fetch polyfill defines fetch() without
            // defining window.Request, and this polyfill need to work on top of unfetch
            // hence we only patch it if it's available. Also we don't patch it if signal
            // is already available on the Request prototype because in this case support
            // is present and the patching below can cause a crash since it assigns to
            // request.signal which is technically a read-only property. This latter error
            // happens when you run the main5.js node-fetch example in the repo
            // "abortcontroller-polyfill-examples". The exact error is:
            //   request.signal = init.signal;
            //   ^
            // TypeError: Cannot set property signal of #<Request> which has only a getter

            if (Request && !Request.prototype.hasOwnProperty('signal') || __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL) {
              Request = function Request(input, init) {
                var signal;

                if (init && init.signal) {
                  signal = init.signal; // Never pass init.signal to the native Request implementation when the polyfill has
                  // been installed because if we're running on top of a browser with a
                  // working native AbortController (i.e. the polyfill was installed due to
                  // __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL being set), then passing our
                  // fake AbortSignal to the native fetch will trigger:
                  // TypeError: Failed to construct 'Request': member signal is not of type AbortSignal.

                  delete init.signal;
                }

                var request = new NativeRequest(input, init);

                if (signal) {
                  Object.defineProperty(request, 'signal', {
                    writable: false,
                    enumerable: false,
                    configurable: true,
                    value: signal
                  });
                }

                return request;
              };

              Request.prototype = NativeRequest.prototype;
            }

            var realFetch = fetch;

            var abortableFetch = function abortableFetch(input, init) {
              var signal = Request && Request.prototype.isPrototypeOf(input) ? input.signal : init ? init.signal : undefined;

              if (signal) {
                var abortError;

                try {
                  abortError = new DOMException('Aborted', 'AbortError');
                } catch (err) {
                  // IE 11 does not support calling the DOMException constructor, use a
                  // regular error object on it instead.
                  abortError = new Error('Aborted');
                  abortError.name = 'AbortError';
                } // Return early if already aborted, thus avoiding making an HTTP request


                if (signal.aborted) {
                  return Promise.reject(abortError);
                } // Turn an event into a promise, reject it once `abort` is dispatched


                var cancellation = new Promise(function (_, reject) {
                  signal.addEventListener('abort', function () {
                    return reject(abortError);
                  }, {
                    once: true
                  });
                });

                if (init && init.signal) {
                  // Never pass .signal to the native implementation when the polyfill has
                  // been installed because if we're running on top of a browser with a
                  // working native AbortController (i.e. the polyfill was installed due to
                  // __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL being set), then passing our
                  // fake AbortSignal to the native fetch will trigger:
                  // TypeError: Failed to execute 'fetch' on 'Window': member signal is not of type AbortSignal.
                  delete init.signal;
                } // Return the fastest promise (don't need to wait for request to finish)


                return Promise.race([cancellation, realFetch(input, init)]);
              }

              return realFetch(input, init);
            };

            return {
              fetch: abortableFetch,
              Request: Request
            };
          }

          (function (self) {
            if (!polyfillNeeded(self)) {
              return;
            }

            if (!self.fetch) {
              console.warn('fetch() is not available, cannot install abortcontroller-polyfill');
              return;
            }

            var _abortableFetch = abortableFetchDecorator(self),
                fetch = _abortableFetch.fetch,
                Request = _abortableFetch.Request;

            self.fetch = fetch;
            self.Request = Request;
            Object.defineProperty(self, 'AbortController', {
              writable: true,
              enumerable: false,
              configurable: true,
              value: AbortController
            });
            Object.defineProperty(self, 'AbortSignal', {
              writable: true,
              enumerable: false,
              configurable: true,
              value: AbortSignal
            });
          })(typeof self !== 'undefined' ? self : commonjsGlobal);
        });

        function actionAddEntity(way) {
          return function (graph) {
            return graph.replace(way);
          };
        }

        var IS_CONCAT_SPREADABLE = wellKnownSymbol('isConcatSpreadable');
        var MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;
        var MAXIMUM_ALLOWED_INDEX_EXCEEDED = 'Maximum allowed index exceeded';

        // We can't use this feature detection in V8 since it causes
        // deoptimization and serious performance degradation
        // https://github.com/zloirock/core-js/issues/679
        var IS_CONCAT_SPREADABLE_SUPPORT = engineV8Version >= 51 || !fails(function () {
          var array = [];
          array[IS_CONCAT_SPREADABLE] = false;
          return array.concat()[0] !== array;
        });

        var SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('concat');

        var isConcatSpreadable = function (O) {
          if (!isObject$4(O)) return false;
          var spreadable = O[IS_CONCAT_SPREADABLE];
          return spreadable !== undefined ? !!spreadable : isArray(O);
        };

        var FORCED$8 = !IS_CONCAT_SPREADABLE_SUPPORT || !SPECIES_SUPPORT;

        // `Array.prototype.concat` method
        // https://tc39.es/ecma262/#sec-array.prototype.concat
        // with adding support of @@isConcatSpreadable and @@species
        _export({ target: 'Array', proto: true, forced: FORCED$8 }, {
          // eslint-disable-next-line no-unused-vars -- required for `.length`
          concat: function concat(arg) {
            var O = toObject(this);
            var A = arraySpeciesCreate(O, 0);
            var n = 0;
            var i, k, length, len, E;
            for (i = -1, length = arguments.length; i < length; i++) {
              E = i === -1 ? O : arguments[i];
              if (isConcatSpreadable(E)) {
                len = toLength(E.length);
                if (n + len > MAX_SAFE_INTEGER) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
                for (k = 0; k < len; k++, n++) if (k in E) createProperty(A, n, E[k]);
              } else {
                if (n >= MAX_SAFE_INTEGER) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
                createProperty(A, n++, E);
              }
            }
            A.length = n;
            return A;
          }
        });

        // `Object.assign` method
        // https://tc39.es/ecma262/#sec-object.assign
        // eslint-disable-next-line es/no-object-assign -- required for testing
        _export({ target: 'Object', stat: true, forced: Object.assign !== objectAssign }, {
          assign: objectAssign
        });

        var $filter = arrayIteration.filter;


        var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('filter');

        // `Array.prototype.filter` method
        // https://tc39.es/ecma262/#sec-array.prototype.filter
        // with adding support of @@species
        _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {
          filter: function filter(callbackfn /* , thisArg */) {
            return $filter(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          }
        });

        var FAILS_ON_PRIMITIVES$1 = fails(function () { objectKeys(1); });

        // `Object.keys` method
        // https://tc39.es/ecma262/#sec-object.keys
        _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$1 }, {
          keys: function keys(it) {
            return objectKeys(toObject(it));
          }
        });

        var nativeReverse = [].reverse;
        var test$1 = [1, 2];

        // `Array.prototype.reverse` method
        // https://tc39.es/ecma262/#sec-array.prototype.reverse
        // fix for Safari 12.0 bug
        // https://bugs.webkit.org/show_bug.cgi?id=188794
        _export({ target: 'Array', proto: true, forced: String(test$1) === String(test$1.reverse()) }, {
          reverse: function reverse() {
            // eslint-disable-next-line no-self-assign -- dirty hack
            if (isArray(this)) this.length = this.length;
            return nativeReverse.call(this);
          }
        });

        var trim$4 = stringTrim.trim;


        var $parseFloat = global$2.parseFloat;
        var FORCED$7 = 1 / $parseFloat(whitespaces + '-0') !== -Infinity;

        // `parseFloat` method
        // https://tc39.es/ecma262/#sec-parsefloat-string
        var numberParseFloat = FORCED$7 ? function parseFloat(string) {
          var trimmedString = trim$4(String(string));
          var result = $parseFloat(trimmedString);
          return result === 0 && trimmedString.charAt(0) == '-' ? -0 : result;
        } : $parseFloat;

        // `parseFloat` method
        // https://tc39.es/ecma262/#sec-parsefloat-string
        _export({ global: true, forced: parseFloat != numberParseFloat }, {
          parseFloat: numberParseFloat
        });

        /*
        Order the nodes of a way in reverse order and reverse any direction dependent tags
        other than `oneway`. (We assume that correcting a backwards oneway is the primary
        reason for reversing a way.)

        In addition, numeric-valued `incline` tags are negated.

        The JOSM implementation was used as a guide, but transformations that were of unclear benefit
        or adjusted tags that don't seem to be used in practice were omitted.

        References:
            http://wiki.openstreetmap.org/wiki/Forward_%26_backward,_left_%26_right
            http://wiki.openstreetmap.org/wiki/Key:direction#Steps
            http://wiki.openstreetmap.org/wiki/Key:incline
            http://wiki.openstreetmap.org/wiki/Route#Members
            http://josm.openstreetmap.de/browser/josm/trunk/src/org/openstreetmap/josm/corrector/ReverseWayTagCorrector.java
            http://wiki.openstreetmap.org/wiki/Tag:highway%3Dstop
            http://wiki.openstreetmap.org/wiki/Key:traffic_sign#On_a_way_or_area
        */
        function actionReverse(entityID, options) {
          var ignoreKey = /^.*(_|:)?(description|name|note|website|ref|source|comment|watch|attribution)(_|:)?/;
          var numeric = /^([+\-]?)(?=[\d.])/;
          var directionKey = /direction$/;
          var turn_lanes = /^turn:lanes:?/;
          var keyReplacements = [[/:right$/, ':left'], [/:left$/, ':right'], [/:forward$/, ':backward'], [/:backward$/, ':forward'], [/:right:/, ':left:'], [/:left:/, ':right:'], [/:forward:/, ':backward:'], [/:backward:/, ':forward:']];
          var valueReplacements = {
            left: 'right',
            right: 'left',
            up: 'down',
            down: 'up',
            forward: 'backward',
            backward: 'forward',
            forwards: 'backward',
            backwards: 'forward'
          };
          var roleReplacements = {
            forward: 'backward',
            backward: 'forward',
            forwards: 'backward',
            backwards: 'forward'
          };
          var onewayReplacements = {
            yes: '-1',
            '1': '-1',
            '-1': 'yes'
          };
          var compassReplacements = {
            N: 'S',
            NNE: 'SSW',
            NE: 'SW',
            ENE: 'WSW',
            E: 'W',
            ESE: 'WNW',
            SE: 'NW',
            SSE: 'NNW',
            S: 'N',
            SSW: 'NNE',
            SW: 'NE',
            WSW: 'ENE',
            W: 'E',
            WNW: 'ESE',
            NW: 'SE',
            NNW: 'SSE'
          };

          function reverseKey(key) {
            for (var i = 0; i < keyReplacements.length; ++i) {
              var replacement = keyReplacements[i];

              if (replacement[0].test(key)) {
                return key.replace(replacement[0], replacement[1]);
              }
            }

            return key;
          }

          function reverseValue(key, value, includeAbsolute) {
            if (ignoreKey.test(key)) return value; // Turn lanes are left/right to key (not way) direction - #5674

            if (turn_lanes.test(key)) {
              return value;
            } else if (key === 'incline' && numeric.test(value)) {
              return value.replace(numeric, function (_, sign) {
                return sign === '-' ? '' : '-';
              });
            } else if (options && options.reverseOneway && key === 'oneway') {
              return onewayReplacements[value] || value;
            } else if (includeAbsolute && directionKey.test(key)) {
              if (compassReplacements[value]) return compassReplacements[value];
              var degrees = parseFloat(value);

              if (typeof degrees === 'number' && !isNaN(degrees)) {
                if (degrees < 180) {
                  degrees += 180;
                } else {
                  degrees -= 180;
                }

                return degrees.toString();
              }
            }

            return valueReplacements[value] || value;
          } // Reverse the direction of tags attached to the nodes - #3076


          function reverseNodeTags(graph, nodeIDs) {
            for (var i = 0; i < nodeIDs.length; i++) {
              var node = graph.hasEntity(nodeIDs[i]);
              if (!node || !Object.keys(node.tags).length) continue;
              var tags = {};

              for (var key in node.tags) {
                tags[reverseKey(key)] = reverseValue(key, node.tags[key], node.id === entityID);
              }

              graph = graph.replace(node.update({
                tags: tags
              }));
            }

            return graph;
          }

          function reverseWay(graph, way) {
            var nodes = way.nodes.slice().reverse();
            var tags = {};
            var role;

            for (var key in way.tags) {
              tags[reverseKey(key)] = reverseValue(key, way.tags[key]);
            }

            graph.parentRelations(way).forEach(function (relation) {
              relation.members.forEach(function (member, index) {
                if (member.id === way.id && (role = roleReplacements[member.role])) {
                  relation = relation.updateMember({
                    role: role
                  }, index);
                  graph = graph.replace(relation);
                }
              });
            }); // Reverse any associated directions on nodes on the way and then replace
            // the way itself with the reversed node ids and updated way tags

            return reverseNodeTags(graph, nodes).replace(way.update({
              nodes: nodes,
              tags: tags
            }));
          }

          var action = function action(graph) {
            var entity = graph.entity(entityID);

            if (entity.type === 'way') {
              return reverseWay(graph, entity);
            }

            return reverseNodeTags(graph, [entityID]);
          };

          action.disabled = function (graph) {
            var entity = graph.hasEntity(entityID);
            if (!entity || entity.type === 'way') return false;

            for (var key in entity.tags) {
              var value = entity.tags[key];

              if (reverseKey(key) !== key || reverseValue(key, value, true) !== value) {
                return false;
              }
            }

            return 'nondirectional_node';
          };

          action.entityID = function () {
            return entityID;
          };

          return action;
        }

        function osmIsInterestingTag(key) {
          return key !== 'attribution' && key !== 'created_by' && key !== 'source' && key !== 'odbl' && key.indexOf('source:') !== 0 && key.indexOf('source_ref') !== 0 && // purposely exclude colon
          key.indexOf('tiger:') !== 0;
        }
        var osmAreaKeys = {};
        function osmSetAreaKeys(value) {
          osmAreaKeys = value;
        } // returns an object with the tag from `tags` that implies an area geometry, if any

        function osmTagSuggestingArea(tags) {
          if (tags.area === 'yes') return {
            area: 'yes'
          };
          if (tags.area === 'no') return null; // `highway` and `railway` are typically linear features, but there
          // are a few exceptions that should be treated as areas, even in the
          // absence of a proper `area=yes` or `areaKeys` tag.. see #4194

          var lineKeys = {
            highway: {
              rest_area: true,
              services: true
            },
            railway: {
              roundhouse: true,
              station: true,
              traverser: true,
              turntable: true,
              wash: true
            }
          };
          var returnTags = {};

          for (var key in tags) {
            if (key in osmAreaKeys && !(tags[key] in osmAreaKeys[key])) {
              returnTags[key] = tags[key];
              return returnTags;
            }

            if (key in lineKeys && tags[key] in lineKeys[key]) {
              returnTags[key] = tags[key];
              return returnTags;
            }
          }

          return null;
        } // Tags that indicate a node can be a standalone point
        // e.g. { amenity: { bar: true, parking: true, ... } ... }

        var osmPointTags = {};
        function osmSetPointTags(value) {
          osmPointTags = value;
        } // Tags that indicate a node can be part of a way
        // e.g. { amenity: { parking: true, ... }, highway: { stop: true ... } ... }

        var osmVertexTags = {};
        function osmSetVertexTags(value) {
          osmVertexTags = value;
        }
        function osmNodeGeometriesForTags(nodeTags) {
          var geometries = {};

          for (var key in nodeTags) {
            if (osmPointTags[key] && (osmPointTags[key]['*'] || osmPointTags[key][nodeTags[key]])) {
              geometries.point = true;
            }

            if (osmVertexTags[key] && (osmVertexTags[key]['*'] || osmVertexTags[key][nodeTags[key]])) {
              geometries.vertex = true;
            } // break early if both are already supported


            if (geometries.point && geometries.vertex) break;
          }

          return geometries;
        }
        var osmOneWayTags = {
          'aerialway': {
            'chair_lift': true,
            'drag_lift': true,
            'j-bar': true,
            'magic_carpet': true,
            'mixed_lift': true,
            'platter': true,
            'rope_tow': true,
            't-bar': true,
            'zip_line': true
          },
          'highway': {
            'motorway': true
          },
          'junction': {
            'circular': true,
            'roundabout': true
          },
          'man_made': {
            'goods_conveyor': true,
            'piste:halfpipe': true
          },
          'piste:type': {
            'downhill': true,
            'sled': true,
            'yes': true
          },
          'waterway': {
            'canal': true,
            'ditch': true,
            'drain': true,
            'fish_pass': true,
            'river': true,
            'stream': true,
            'tidal_channel': true
          }
        }; // solid and smooth surfaces akin to the assumed default road surface in OSM

        var osmPavedTags = {
          'surface': {
            'paved': true,
            'asphalt': true,
            'concrete': true,
            'concrete:lanes': true,
            'concrete:plates': true
          },
          'tracktype': {
            'grade1': true
          }
        }; // solid, if somewhat uncommon surfaces with a high range of smoothness

        var osmSemipavedTags = {
          'surface': {
            'cobblestone': true,
            'cobblestone:flattened': true,
            'unhewn_cobblestone': true,
            'sett': true,
            'paving_stones': true,
            'metal': true,
            'wood': true
          }
        };
        var osmRightSideIsInsideTags = {
          'natural': {
            'cliff': true,
            'coastline': 'coastline'
          },
          'barrier': {
            'retaining_wall': true,
            'kerb': true,
            'guard_rail': true,
            'city_wall': true
          },
          'man_made': {
            'embankment': true
          },
          'waterway': {
            'weir': true
          }
        }; // "highway" tag values for pedestrian or vehicle right-of-ways that make up the routable network
        // (does not include `raceway`)

        var osmRoutableHighwayTagValues = {
          motorway: true,
          trunk: true,
          primary: true,
          secondary: true,
          tertiary: true,
          residential: true,
          motorway_link: true,
          trunk_link: true,
          primary_link: true,
          secondary_link: true,
          tertiary_link: true,
          unclassified: true,
          road: true,
          service: true,
          track: true,
          living_street: true,
          bus_guideway: true,
          path: true,
          footway: true,
          cycleway: true,
          bridleway: true,
          pedestrian: true,
          corridor: true,
          steps: true
        }; // "highway" tag values that generally do not allow motor vehicles

        var osmPathHighwayTagValues = {
          path: true,
          footway: true,
          cycleway: true,
          bridleway: true,
          pedestrian: true,
          corridor: true,
          steps: true
        }; // "railway" tag values representing existing railroad tracks (purposely does not include 'abandoned')

        var osmRailwayTrackTagValues = {
          rail: true,
          light_rail: true,
          tram: true,
          subway: true,
          monorail: true,
          funicular: true,
          miniature: true,
          narrow_gauge: true,
          disused: true,
          preserved: true
        }; // "waterway" tag values for line features representing water flow

        var osmFlowingWaterwayTagValues = {
          canal: true,
          ditch: true,
          drain: true,
          fish_pass: true,
          river: true,
          stream: true,
          tidal_channel: true
        };

        var trim$3 = stringTrim.trim;


        var $parseInt = global$2.parseInt;
        var hex$2 = /^[+-]?0[Xx]/;
        var FORCED$6 = $parseInt(whitespaces + '08') !== 8 || $parseInt(whitespaces + '0x16') !== 22;

        // `parseInt` method
        // https://tc39.es/ecma262/#sec-parseint-string-radix
        var numberParseInt = FORCED$6 ? function parseInt(string, radix) {
          var S = trim$3(String(string));
          return $parseInt(S, (radix >>> 0) || (hex$2.test(S) ? 16 : 10));
        } : $parseInt;

        // `parseInt` method
        // https://tc39.es/ecma262/#sec-parseint-string-radix
        _export({ global: true, forced: parseInt != numberParseInt }, {
          parseInt: numberParseInt
        });

        var freezing = !fails(function () {
          // eslint-disable-next-line es/no-object-isextensible, es/no-object-preventextensions -- required for testing
          return Object.isExtensible(Object.preventExtensions({}));
        });

        var internalMetadata = createCommonjsModule(function (module) {
        var defineProperty = objectDefineProperty.f;



        var METADATA = uid('meta');
        var id = 0;

        // eslint-disable-next-line es/no-object-isextensible -- safe
        var isExtensible = Object.isExtensible || function () {
          return true;
        };

        var setMetadata = function (it) {
          defineProperty(it, METADATA, { value: {
            objectID: 'O' + ++id, // object ID
            weakData: {}          // weak collections IDs
          } });
        };

        var fastKey = function (it, create) {
          // return a primitive with prefix
          if (!isObject$4(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;
          if (!has$1(it, METADATA)) {
            // can't set metadata to uncaught frozen object
            if (!isExtensible(it)) return 'F';
            // not necessary to add metadata
            if (!create) return 'E';
            // add missing metadata
            setMetadata(it);
          // return object ID
          } return it[METADATA].objectID;
        };

        var getWeakData = function (it, create) {
          if (!has$1(it, METADATA)) {
            // can't set metadata to uncaught frozen object
            if (!isExtensible(it)) return true;
            // not necessary to add metadata
            if (!create) return false;
            // add missing metadata
            setMetadata(it);
          // return the store of weak collections IDs
          } return it[METADATA].weakData;
        };

        // add metadata on freeze-family methods calling
        var onFreeze = function (it) {
          if (freezing && meta.REQUIRED && isExtensible(it) && !has$1(it, METADATA)) setMetadata(it);
          return it;
        };

        var meta = module.exports = {
          REQUIRED: false,
          fastKey: fastKey,
          getWeakData: getWeakData,
          onFreeze: onFreeze
        };

        hiddenKeys$1[METADATA] = true;
        });

        var collection = function (CONSTRUCTOR_NAME, wrapper, common) {
          var IS_MAP = CONSTRUCTOR_NAME.indexOf('Map') !== -1;
          var IS_WEAK = CONSTRUCTOR_NAME.indexOf('Weak') !== -1;
          var ADDER = IS_MAP ? 'set' : 'add';
          var NativeConstructor = global$2[CONSTRUCTOR_NAME];
          var NativePrototype = NativeConstructor && NativeConstructor.prototype;
          var Constructor = NativeConstructor;
          var exported = {};

          var fixMethod = function (KEY) {
            var nativeMethod = NativePrototype[KEY];
            redefine(NativePrototype, KEY,
              KEY == 'add' ? function add(value) {
                nativeMethod.call(this, value === 0 ? 0 : value);
                return this;
              } : KEY == 'delete' ? function (key) {
                return IS_WEAK && !isObject$4(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);
              } : KEY == 'get' ? function get(key) {
                return IS_WEAK && !isObject$4(key) ? undefined : nativeMethod.call(this, key === 0 ? 0 : key);
              } : KEY == 'has' ? function has(key) {
                return IS_WEAK && !isObject$4(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);
              } : function set(key, value) {
                nativeMethod.call(this, key === 0 ? 0 : key, value);
                return this;
              }
            );
          };

          var REPLACE = isForced_1(
            CONSTRUCTOR_NAME,
            typeof NativeConstructor != 'function' || !(IS_WEAK || NativePrototype.forEach && !fails(function () {
              new NativeConstructor().entries().next();
            }))
          );

          if (REPLACE) {
            // create collection constructor
            Constructor = common.getConstructor(wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER);
            internalMetadata.REQUIRED = true;
          } else if (isForced_1(CONSTRUCTOR_NAME, true)) {
            var instance = new Constructor();
            // early implementations not supports chaining
            var HASNT_CHAINING = instance[ADDER](IS_WEAK ? {} : -0, 1) != instance;
            // V8 ~ Chromium 40- weak-collections throws on primitives, but should return false
            var THROWS_ON_PRIMITIVES = fails(function () { instance.has(1); });
            // most early implementations doesn't supports iterables, most modern - not close it correctly
            // eslint-disable-next-line no-new -- required for testing
            var ACCEPT_ITERABLES = checkCorrectnessOfIteration(function (iterable) { new NativeConstructor(iterable); });
            // for early implementations -0 and +0 not the same
            var BUGGY_ZERO = !IS_WEAK && fails(function () {
              // V8 ~ Chromium 42- fails only with 5+ elements
              var $instance = new NativeConstructor();
              var index = 5;
              while (index--) $instance[ADDER](index, index);
              return !$instance.has(-0);
            });

            if (!ACCEPT_ITERABLES) {
              Constructor = wrapper(function (dummy, iterable) {
                anInstance(dummy, Constructor, CONSTRUCTOR_NAME);
                var that = inheritIfRequired(new NativeConstructor(), dummy, Constructor);
                if (iterable != undefined) iterate(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
                return that;
              });
              Constructor.prototype = NativePrototype;
              NativePrototype.constructor = Constructor;
            }

            if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) {
              fixMethod('delete');
              fixMethod('has');
              IS_MAP && fixMethod('get');
            }

            if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER);

            // weak collections should not contains .clear method
            if (IS_WEAK && NativePrototype.clear) delete NativePrototype.clear;
          }

          exported[CONSTRUCTOR_NAME] = Constructor;
          _export({ global: true, forced: Constructor != NativeConstructor }, exported);

          setToStringTag(Constructor, CONSTRUCTOR_NAME);

          if (!IS_WEAK) common.setStrong(Constructor, CONSTRUCTOR_NAME, IS_MAP);

          return Constructor;
        };

        var defineProperty$2 = objectDefineProperty.f;








        var fastKey = internalMetadata.fastKey;


        var setInternalState = internalState.set;
        var internalStateGetterFor = internalState.getterFor;

        var collectionStrong = {
          getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {
            var C = wrapper(function (that, iterable) {
              anInstance(that, C, CONSTRUCTOR_NAME);
              setInternalState(that, {
                type: CONSTRUCTOR_NAME,
                index: objectCreate(null),
                first: undefined,
                last: undefined,
                size: 0
              });
              if (!descriptors) that.size = 0;
              if (iterable != undefined) iterate(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
            });

            var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);

            var define = function (that, key, value) {
              var state = getInternalState(that);
              var entry = getEntry(that, key);
              var previous, index;
              // change existing entry
              if (entry) {
                entry.value = value;
              // create new entry
              } else {
                state.last = entry = {
                  index: index = fastKey(key, true),
                  key: key,
                  value: value,
                  previous: previous = state.last,
                  next: undefined,
                  removed: false
                };
                if (!state.first) state.first = entry;
                if (previous) previous.next = entry;
                if (descriptors) state.size++;
                else that.size++;
                // add to index
                if (index !== 'F') state.index[index] = entry;
              } return that;
            };

            var getEntry = function (that, key) {
              var state = getInternalState(that);
              // fast case
              var index = fastKey(key);
              var entry;
              if (index !== 'F') return state.index[index];
              // frozen object case
              for (entry = state.first; entry; entry = entry.next) {
                if (entry.key == key) return entry;
              }
            };

            redefineAll(C.prototype, {
              // `{ Map, Set }.prototype.clear()` methods
              // https://tc39.es/ecma262/#sec-map.prototype.clear
              // https://tc39.es/ecma262/#sec-set.prototype.clear
              clear: function clear() {
                var that = this;
                var state = getInternalState(that);
                var data = state.index;
                var entry = state.first;
                while (entry) {
                  entry.removed = true;
                  if (entry.previous) entry.previous = entry.previous.next = undefined;
                  delete data[entry.index];
                  entry = entry.next;
                }
                state.first = state.last = undefined;
                if (descriptors) state.size = 0;
                else that.size = 0;
              },
              // `{ Map, Set }.prototype.delete(key)` methods
              // https://tc39.es/ecma262/#sec-map.prototype.delete
              // https://tc39.es/ecma262/#sec-set.prototype.delete
              'delete': function (key) {
                var that = this;
                var state = getInternalState(that);
                var entry = getEntry(that, key);
                if (entry) {
                  var next = entry.next;
                  var prev = entry.previous;
                  delete state.index[entry.index];
                  entry.removed = true;
                  if (prev) prev.next = next;
                  if (next) next.previous = prev;
                  if (state.first == entry) state.first = next;
                  if (state.last == entry) state.last = prev;
                  if (descriptors) state.size--;
                  else that.size--;
                } return !!entry;
              },
              // `{ Map, Set }.prototype.forEach(callbackfn, thisArg = undefined)` methods
              // https://tc39.es/ecma262/#sec-map.prototype.foreach
              // https://tc39.es/ecma262/#sec-set.prototype.foreach
              forEach: function forEach(callbackfn /* , that = undefined */) {
                var state = getInternalState(this);
                var boundFunction = functionBindContext(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);
                var entry;
                while (entry = entry ? entry.next : state.first) {
                  boundFunction(entry.value, entry.key, this);
                  // revert to the last existing entry
                  while (entry && entry.removed) entry = entry.previous;
                }
              },
              // `{ Map, Set}.prototype.has(key)` methods
              // https://tc39.es/ecma262/#sec-map.prototype.has
              // https://tc39.es/ecma262/#sec-set.prototype.has
              has: function has(key) {
                return !!getEntry(this, key);
              }
            });

            redefineAll(C.prototype, IS_MAP ? {
              // `Map.prototype.get(key)` method
              // https://tc39.es/ecma262/#sec-map.prototype.get
              get: function get(key) {
                var entry = getEntry(this, key);
                return entry && entry.value;
              },
              // `Map.prototype.set(key, value)` method
              // https://tc39.es/ecma262/#sec-map.prototype.set
              set: function set(key, value) {
                return define(this, key === 0 ? 0 : key, value);
              }
            } : {
              // `Set.prototype.add(value)` method
              // https://tc39.es/ecma262/#sec-set.prototype.add
              add: function add(value) {
                return define(this, value = value === 0 ? 0 : value, value);
              }
            });
            if (descriptors) defineProperty$2(C.prototype, 'size', {
              get: function () {
                return getInternalState(this).size;
              }
            });
            return C;
          },
          setStrong: function (C, CONSTRUCTOR_NAME, IS_MAP) {
            var ITERATOR_NAME = CONSTRUCTOR_NAME + ' Iterator';
            var getInternalCollectionState = internalStateGetterFor(CONSTRUCTOR_NAME);
            var getInternalIteratorState = internalStateGetterFor(ITERATOR_NAME);
            // `{ Map, Set }.prototype.{ keys, values, entries, @@iterator }()` methods
            // https://tc39.es/ecma262/#sec-map.prototype.entries
            // https://tc39.es/ecma262/#sec-map.prototype.keys
            // https://tc39.es/ecma262/#sec-map.prototype.values
            // https://tc39.es/ecma262/#sec-map.prototype-@@iterator
            // https://tc39.es/ecma262/#sec-set.prototype.entries
            // https://tc39.es/ecma262/#sec-set.prototype.keys
            // https://tc39.es/ecma262/#sec-set.prototype.values
            // https://tc39.es/ecma262/#sec-set.prototype-@@iterator
            defineIterator(C, CONSTRUCTOR_NAME, function (iterated, kind) {
              setInternalState(this, {
                type: ITERATOR_NAME,
                target: iterated,
                state: getInternalCollectionState(iterated),
                kind: kind,
                last: undefined
              });
            }, function () {
              var state = getInternalIteratorState(this);
              var kind = state.kind;
              var entry = state.last;
              // revert to the last existing entry
              while (entry && entry.removed) entry = entry.previous;
              // get next entry
              if (!state.target || !(state.last = entry = entry ? entry.next : state.state.first)) {
                // or finish the iteration
                state.target = undefined;
                return { value: undefined, done: true };
              }
              // return step by kind
              if (kind == 'keys') return { value: entry.key, done: false };
              if (kind == 'values') return { value: entry.value, done: false };
              return { value: [entry.key, entry.value], done: false };
            }, IS_MAP ? 'entries' : 'values', !IS_MAP, true);

            // `{ Map, Set }.prototype[@@species]` accessors
            // https://tc39.es/ecma262/#sec-get-map-@@species
            // https://tc39.es/ecma262/#sec-get-set-@@species
            setSpecies(CONSTRUCTOR_NAME);
          }
        };

        // `Set` constructor
        // https://tc39.es/ecma262/#sec-set-objects
        collection('Set', function (init) {
          return function Set() { return init(this, arguments.length ? arguments[0] : undefined); };
        }, collectionStrong);

        function d3_ascending (a, b) {
          return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
        }

        function d3_bisector (f) {
          var delta = f;
          var compare = f;

          if (f.length === 1) {
            delta = function delta(d, x) {
              return f(d) - x;
            };

            compare = ascendingComparator(f);
          }

          function left(a, x, lo, hi) {
            if (lo == null) lo = 0;
            if (hi == null) hi = a.length;

            while (lo < hi) {
              var mid = lo + hi >>> 1;
              if (compare(a[mid], x) < 0) lo = mid + 1;else hi = mid;
            }

            return lo;
          }

          function right(a, x, lo, hi) {
            if (lo == null) lo = 0;
            if (hi == null) hi = a.length;

            while (lo < hi) {
              var mid = lo + hi >>> 1;
              if (compare(a[mid], x) > 0) hi = mid;else lo = mid + 1;
            }

            return lo;
          }

          function center(a, x, lo, hi) {
            if (lo == null) lo = 0;
            if (hi == null) hi = a.length;
            var i = left(a, x, lo, hi - 1);
            return i > lo && delta(a[i - 1], x) > -delta(a[i], x) ? i - 1 : i;
          }

          return {
            left: left,
            center: center,
            right: right
          };
        }

        function ascendingComparator(f) {
          return function (d, x) {
            return d3_ascending(f(d), x);
          };
        }

        // `Symbol.asyncIterator` well-known symbol
        // https://tc39.es/ecma262/#sec-symbol.asynciterator
        defineWellKnownSymbol('asyncIterator');

        createCommonjsModule(function (module) {
          var runtime = function (exports) {

            var Op = Object.prototype;
            var hasOwn = Op.hasOwnProperty;
            var undefined$1; // More compressible than void 0.

            var $Symbol = typeof Symbol === "function" ? Symbol : {};
            var iteratorSymbol = $Symbol.iterator || "@@iterator";
            var asyncIteratorSymbol = $Symbol.asyncIterator || "@@asyncIterator";
            var toStringTagSymbol = $Symbol.toStringTag || "@@toStringTag";

            function define(obj, key, value) {
              Object.defineProperty(obj, key, {
                value: value,
                enumerable: true,
                configurable: true,
                writable: true
              });
              return obj[key];
            }

            try {
              // IE 8 has a broken Object.defineProperty that only works on DOM objects.
              define({}, "");
            } catch (err) {
              define = function define(obj, key, value) {
                return obj[key] = value;
              };
            }

            function wrap(innerFn, outerFn, self, tryLocsList) {
              // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.
              var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;
              var generator = Object.create(protoGenerator.prototype);
              var context = new Context(tryLocsList || []); // The ._invoke method unifies the implementations of the .next,
              // .throw, and .return methods.

              generator._invoke = makeInvokeMethod(innerFn, self, context);
              return generator;
            }

            exports.wrap = wrap; // Try/catch helper to minimize deoptimizations. Returns a completion
            // record like context.tryEntries[i].completion. This interface could
            // have been (and was previously) designed to take a closure to be
            // invoked without arguments, but in all the cases we care about we
            // already have an existing method we want to call, so there's no need
            // to create a new function object. We can even get away with assuming
            // the method takes exactly one argument, since that happens to be true
            // in every case, so we don't have to touch the arguments object. The
            // only additional allocation required is the completion record, which
            // has a stable shape and so hopefully should be cheap to allocate.

            function tryCatch(fn, obj, arg) {
              try {
                return {
                  type: "normal",
                  arg: fn.call(obj, arg)
                };
              } catch (err) {
                return {
                  type: "throw",
                  arg: err
                };
              }
            }

            var GenStateSuspendedStart = "suspendedStart";
            var GenStateSuspendedYield = "suspendedYield";
            var GenStateExecuting = "executing";
            var GenStateCompleted = "completed"; // Returning this object from the innerFn has the same effect as
            // breaking out of the dispatch switch statement.

            var ContinueSentinel = {}; // Dummy constructor functions that we use as the .constructor and
            // .constructor.prototype properties for functions that return Generator
            // objects. For full spec compliance, you may wish to configure your
            // minifier not to mangle the names of these two functions.

            function Generator() {}

            function GeneratorFunction() {}

            function GeneratorFunctionPrototype() {} // This is a polyfill for %IteratorPrototype% for environments that
            // don't natively support it.


            var IteratorPrototype = {};

            IteratorPrototype[iteratorSymbol] = function () {
              return this;
            };

            var getProto = Object.getPrototypeOf;
            var NativeIteratorPrototype = getProto && getProto(getProto(values([])));

            if (NativeIteratorPrototype && NativeIteratorPrototype !== Op && hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {
              // This environment has a native %IteratorPrototype%; use it instead
              // of the polyfill.
              IteratorPrototype = NativeIteratorPrototype;
            }

            var Gp = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(IteratorPrototype);
            GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;
            GeneratorFunctionPrototype.constructor = GeneratorFunction;
            GeneratorFunction.displayName = define(GeneratorFunctionPrototype, toStringTagSymbol, "GeneratorFunction"); // Helper for defining the .next, .throw, and .return methods of the
            // Iterator interface in terms of a single ._invoke method.

            function defineIteratorMethods(prototype) {
              ["next", "throw", "return"].forEach(function (method) {
                define(prototype, method, function (arg) {
                  return this._invoke(method, arg);
                });
              });
            }

            exports.isGeneratorFunction = function (genFun) {
              var ctor = typeof genFun === "function" && genFun.constructor;
              return ctor ? ctor === GeneratorFunction || // For the native GeneratorFunction constructor, the best we can
              // do is to check its .name property.
              (ctor.displayName || ctor.name) === "GeneratorFunction" : false;
            };

            exports.mark = function (genFun) {
              if (Object.setPrototypeOf) {
                Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);
              } else {
                genFun.__proto__ = GeneratorFunctionPrototype;
                define(genFun, toStringTagSymbol, "GeneratorFunction");
              }

              genFun.prototype = Object.create(Gp);
              return genFun;
            }; // Within the body of any async function, `await x` is transformed to
            // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test
            // `hasOwn.call(value, "__await")` to determine if the yielded value is
            // meant to be awaited.


            exports.awrap = function (arg) {
              return {
                __await: arg
              };
            };

            function AsyncIterator(generator, PromiseImpl) {
              function invoke(method, arg, resolve, reject) {
                var record = tryCatch(generator[method], generator, arg);

                if (record.type === "throw") {
                  reject(record.arg);
                } else {
                  var result = record.arg;
                  var value = result.value;

                  if (value && _typeof(value) === "object" && hasOwn.call(value, "__await")) {
                    return PromiseImpl.resolve(value.__await).then(function (value) {
                      invoke("next", value, resolve, reject);
                    }, function (err) {
                      invoke("throw", err, resolve, reject);
                    });
                  }

                  return PromiseImpl.resolve(value).then(function (unwrapped) {
                    // When a yielded Promise is resolved, its final value becomes
                    // the .value of the Promise<{value,done}> result for the
                    // current iteration.
                    result.value = unwrapped;
                    resolve(result);
                  }, function (error) {
                    // If a rejected Promise was yielded, throw the rejection back
                    // into the async generator function so it can be handled there.
                    return invoke("throw", error, resolve, reject);
                  });
                }
              }

              var previousPromise;

              function enqueue(method, arg) {
                function callInvokeWithMethodAndArg() {
                  return new PromiseImpl(function (resolve, reject) {
                    invoke(method, arg, resolve, reject);
                  });
                }

                return previousPromise = // If enqueue has been called before, then we want to wait until
                // all previous Promises have been resolved before calling invoke,
                // so that results are always delivered in the correct order. If
                // enqueue has not been called before, then it is important to
                // call invoke immediately, without waiting on a callback to fire,
                // so that the async generator function has the opportunity to do
                // any necessary setup in a predictable way. This predictability
                // is why the Promise constructor synchronously invokes its
                // executor callback, and why async functions synchronously
                // execute code before the first await. Since we implement simple
                // async functions in terms of async generators, it is especially
                // important to get this right, even though it requires care.
                previousPromise ? previousPromise.then(callInvokeWithMethodAndArg, // Avoid propagating failures to Promises returned by later
                // invocations of the iterator.
                callInvokeWithMethodAndArg) : callInvokeWithMethodAndArg();
              } // Define the unified helper method that is used to implement .next,
              // .throw, and .return (see defineIteratorMethods).


              this._invoke = enqueue;
            }

            defineIteratorMethods(AsyncIterator.prototype);

            AsyncIterator.prototype[asyncIteratorSymbol] = function () {
              return this;
            };

            exports.AsyncIterator = AsyncIterator; // Note that simple async functions are implemented on top of
            // AsyncIterator objects; they just return a Promise for the value of
            // the final result produced by the iterator.

            exports.async = function (innerFn, outerFn, self, tryLocsList, PromiseImpl) {
              if (PromiseImpl === void 0) PromiseImpl = Promise;
              var iter = new AsyncIterator(wrap(innerFn, outerFn, self, tryLocsList), PromiseImpl);
              return exports.isGeneratorFunction(outerFn) ? iter // If outerFn is a generator, return the full iterator.
              : iter.next().then(function (result) {
                return result.done ? result.value : iter.next();
              });
            };

            function makeInvokeMethod(innerFn, self, context) {
              var state = GenStateSuspendedStart;
              return function invoke(method, arg) {
                if (state === GenStateExecuting) {
                  throw new Error("Generator is already running");
                }

                if (state === GenStateCompleted) {
                  if (method === "throw") {
                    throw arg;
                  } // Be forgiving, per 25.3.3.3.3 of the spec:
                  // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume


                  return doneResult();
                }

                context.method = method;
                context.arg = arg;

                while (true) {
                  var delegate = context.delegate;

                  if (delegate) {
                    var delegateResult = maybeInvokeDelegate(delegate, context);

                    if (delegateResult) {
                      if (delegateResult === ContinueSentinel) continue;
                      return delegateResult;
                    }
                  }

                  if (context.method === "next") {
                    // Setting context._sent for legacy support of Babel's
                    // function.sent implementation.
                    context.sent = context._sent = context.arg;
                  } else if (context.method === "throw") {
                    if (state === GenStateSuspendedStart) {
                      state = GenStateCompleted;
                      throw context.arg;
                    }

                    context.dispatchException(context.arg);
                  } else if (context.method === "return") {
                    context.abrupt("return", context.arg);
                  }

                  state = GenStateExecuting;
                  var record = tryCatch(innerFn, self, context);

                  if (record.type === "normal") {
                    // If an exception is thrown from innerFn, we leave state ===
                    // GenStateExecuting and loop back for another invocation.
                    state = context.done ? GenStateCompleted : GenStateSuspendedYield;

                    if (record.arg === ContinueSentinel) {
                      continue;
                    }

                    return {
                      value: record.arg,
                      done: context.done
                    };
                  } else if (record.type === "throw") {
                    state = GenStateCompleted; // Dispatch the exception by looping back around to the
                    // context.dispatchException(context.arg) call above.

                    context.method = "throw";
                    context.arg = record.arg;
                  }
                }
              };
            } // Call delegate.iterator[context.method](context.arg) and handle the
            // result, either by returning a { value, done } result from the
            // delegate iterator, or by modifying context.method and context.arg,
            // setting context.delegate to null, and returning the ContinueSentinel.


            function maybeInvokeDelegate(delegate, context) {
              var method = delegate.iterator[context.method];

              if (method === undefined$1) {
                // A .throw or .return when the delegate iterator has no .throw
                // method always terminates the yield* loop.
                context.delegate = null;

                if (context.method === "throw") {
                  // Note: ["return"] must be used for ES3 parsing compatibility.
                  if (delegate.iterator["return"]) {
                    // If the delegate iterator has a return method, give it a
                    // chance to clean up.
                    context.method = "return";
                    context.arg = undefined$1;
                    maybeInvokeDelegate(delegate, context);

                    if (context.method === "throw") {
                      // If maybeInvokeDelegate(context) changed context.method from
                      // "return" to "throw", let that override the TypeError below.
                      return ContinueSentinel;
                    }
                  }

                  context.method = "throw";
                  context.arg = new TypeError("The iterator does not provide a 'throw' method");
                }

                return ContinueSentinel;
              }

              var record = tryCatch(method, delegate.iterator, context.arg);

              if (record.type === "throw") {
                context.method = "throw";
                context.arg = record.arg;
                context.delegate = null;
                return ContinueSentinel;
              }

              var info = record.arg;

              if (!info) {
                context.method = "throw";
                context.arg = new TypeError("iterator result is not an object");
                context.delegate = null;
                return ContinueSentinel;
              }

              if (info.done) {
                // Assign the result of the finished delegate to the temporary
                // variable specified by delegate.resultName (see delegateYield).
                context[delegate.resultName] = info.value; // Resume execution at the desired location (see delegateYield).

                context.next = delegate.nextLoc; // If context.method was "throw" but the delegate handled the
                // exception, let the outer generator proceed normally. If
                // context.method was "next", forget context.arg since it has been
                // "consumed" by the delegate iterator. If context.method was
                // "return", allow the original .return call to continue in the
                // outer generator.

                if (context.method !== "return") {
                  context.method = "next";
                  context.arg = undefined$1;
                }
              } else {
                // Re-yield the result returned by the delegate method.
                return info;
              } // The delegate iterator is finished, so forget it and continue with
              // the outer generator.


              context.delegate = null;
              return ContinueSentinel;
            } // Define Generator.prototype.{next,throw,return} in terms of the
            // unified ._invoke helper method.


            defineIteratorMethods(Gp);
            define(Gp, toStringTagSymbol, "Generator"); // A Generator should always return itself as the iterator object when the
            // @@iterator function is called on it. Some browsers' implementations of the
            // iterator prototype chain incorrectly implement this, causing the Generator
            // object to not be returned from this call. This ensures that doesn't happen.
            // See https://github.com/facebook/regenerator/issues/274 for more details.

            Gp[iteratorSymbol] = function () {
              return this;
            };

            Gp.toString = function () {
              return "[object Generator]";
            };

            function pushTryEntry(locs) {
              var entry = {
                tryLoc: locs[0]
              };

              if (1 in locs) {
                entry.catchLoc = locs[1];
              }

              if (2 in locs) {
                entry.finallyLoc = locs[2];
                entry.afterLoc = locs[3];
              }

              this.tryEntries.push(entry);
            }

            function resetTryEntry(entry) {
              var record = entry.completion || {};
              record.type = "normal";
              delete record.arg;
              entry.completion = record;
            }

            function Context(tryLocsList) {
              // The root entry object (effectively a try statement without a catch
              // or a finally block) gives us a place to store values thrown from
              // locations where there is no enclosing try statement.
              this.tryEntries = [{
                tryLoc: "root"
              }];
              tryLocsList.forEach(pushTryEntry, this);
              this.reset(true);
            }

            exports.keys = function (object) {
              var keys = [];

              for (var key in object) {
                keys.push(key);
              }

              keys.reverse(); // Rather than returning an object with a next method, we keep
              // things simple and return the next function itself.

              return function next() {
                while (keys.length) {
                  var key = keys.pop();

                  if (key in object) {
                    next.value = key;
                    next.done = false;
                    return next;
                  }
                } // To avoid creating an additional object, we just hang the .value
                // and .done properties off the next function object itself. This
                // also ensures that the minifier will not anonymize the function.


                next.done = true;
                return next;
              };
            };

            function values(iterable) {
              if (iterable) {
                var iteratorMethod = iterable[iteratorSymbol];

                if (iteratorMethod) {
                  return iteratorMethod.call(iterable);
                }

                if (typeof iterable.next === "function") {
                  return iterable;
                }

                if (!isNaN(iterable.length)) {
                  var i = -1,
                      next = function next() {
                    while (++i < iterable.length) {
                      if (hasOwn.call(iterable, i)) {
                        next.value = iterable[i];
                        next.done = false;
                        return next;
                      }
                    }

                    next.value = undefined$1;
                    next.done = true;
                    return next;
                  };

                  return next.next = next;
                }
              } // Return an iterator with no values.


              return {
                next: doneResult
              };
            }

            exports.values = values;

            function doneResult() {
              return {
                value: undefined$1,
                done: true
              };
            }

            Context.prototype = {
              constructor: Context,
              reset: function reset(skipTempReset) {
                this.prev = 0;
                this.next = 0; // Resetting context._sent for legacy support of Babel's
                // function.sent implementation.

                this.sent = this._sent = undefined$1;
                this.done = false;
                this.delegate = null;
                this.method = "next";
                this.arg = undefined$1;
                this.tryEntries.forEach(resetTryEntry);

                if (!skipTempReset) {
                  for (var name in this) {
                    // Not sure about the optimal order of these conditions:
                    if (name.charAt(0) === "t" && hasOwn.call(this, name) && !isNaN(+name.slice(1))) {
                      this[name] = undefined$1;
                    }
                  }
                }
              },
              stop: function stop() {
                this.done = true;
                var rootEntry = this.tryEntries[0];
                var rootRecord = rootEntry.completion;

                if (rootRecord.type === "throw") {
                  throw rootRecord.arg;
                }

                return this.rval;
              },
              dispatchException: function dispatchException(exception) {
                if (this.done) {
                  throw exception;
                }

                var context = this;

                function handle(loc, caught) {
                  record.type = "throw";
                  record.arg = exception;
                  context.next = loc;

                  if (caught) {
                    // If the dispatched exception was caught by a catch block,
                    // then let that catch block handle the exception normally.
                    context.method = "next";
                    context.arg = undefined$1;
                  }

                  return !!caught;
                }

                for (var i = this.tryEntries.length - 1; i >= 0; --i) {
                  var entry = this.tryEntries[i];
                  var record = entry.completion;

                  if (entry.tryLoc === "root") {
                    // Exception thrown outside of any try block that could handle
                    // it, so set the completion value of the entire function to
                    // throw the exception.
                    return handle("end");
                  }

                  if (entry.tryLoc <= this.prev) {
                    var hasCatch = hasOwn.call(entry, "catchLoc");
                    var hasFinally = hasOwn.call(entry, "finallyLoc");

                    if (hasCatch && hasFinally) {
                      if (this.prev < entry.catchLoc) {
                        return handle(entry.catchLoc, true);
                      } else if (this.prev < entry.finallyLoc) {
                        return handle(entry.finallyLoc);
                      }
                    } else if (hasCatch) {
                      if (this.prev < entry.catchLoc) {
                        return handle(entry.catchLoc, true);
                      }
                    } else if (hasFinally) {
                      if (this.prev < entry.finallyLoc) {
                        return handle(entry.finallyLoc);
                      }
                    } else {
                      throw new Error("try statement without catch or finally");
                    }
                  }
                }
              },
              abrupt: function abrupt(type, arg) {
                for (var i = this.tryEntries.length - 1; i >= 0; --i) {
                  var entry = this.tryEntries[i];

                  if (entry.tryLoc <= this.prev && hasOwn.call(entry, "finallyLoc") && this.prev < entry.finallyLoc) {
                    var finallyEntry = entry;
                    break;
                  }
                }

                if (finallyEntry && (type === "break" || type === "continue") && finallyEntry.tryLoc <= arg && arg <= finallyEntry.finallyLoc) {
                  // Ignore the finally entry if control is not jumping to a
                  // location outside the try/catch block.
                  finallyEntry = null;
                }

                var record = finallyEntry ? finallyEntry.completion : {};
                record.type = type;
                record.arg = arg;

                if (finallyEntry) {
                  this.method = "next";
                  this.next = finallyEntry.finallyLoc;
                  return ContinueSentinel;
                }

                return this.complete(record);
              },
              complete: function complete(record, afterLoc) {
                if (record.type === "throw") {
                  throw record.arg;
                }

                if (record.type === "break" || record.type === "continue") {
                  this.next = record.arg;
                } else if (record.type === "return") {
                  this.rval = this.arg = record.arg;
                  this.method = "return";
                  this.next = "end";
                } else if (record.type === "normal" && afterLoc) {
                  this.next = afterLoc;
                }

                return ContinueSentinel;
              },
              finish: function finish(finallyLoc) {
                for (var i = this.tryEntries.length - 1; i >= 0; --i) {
                  var entry = this.tryEntries[i];

                  if (entry.finallyLoc === finallyLoc) {
                    this.complete(entry.completion, entry.afterLoc);
                    resetTryEntry(entry);
                    return ContinueSentinel;
                  }
                }
              },
              "catch": function _catch(tryLoc) {
                for (var i = this.tryEntries.length - 1; i >= 0; --i) {
                  var entry = this.tryEntries[i];

                  if (entry.tryLoc === tryLoc) {
                    var record = entry.completion;

                    if (record.type === "throw") {
                      var thrown = record.arg;
                      resetTryEntry(entry);
                    }

                    return thrown;
                  }
                } // The context.catch method must only be called with a location
                // argument that corresponds to a known catch block.


                throw new Error("illegal catch attempt");
              },
              delegateYield: function delegateYield(iterable, resultName, nextLoc) {
                this.delegate = {
                  iterator: values(iterable),
                  resultName: resultName,
                  nextLoc: nextLoc
                };

                if (this.method === "next") {
                  // Deliberately forget the last sent value so that we don't
                  // accidentally pass it on to the delegate.
                  this.arg = undefined$1;
                }

                return ContinueSentinel;
              }
            }; // Regardless of whether this script is executing as a CommonJS module
            // or not, return the runtime object so that we can declare the variable
            // regeneratorRuntime in the outer scope, which allows this module to be
            // injected easily by `bin/regenerator --include-runtime script.js`.

            return exports;
          }( // If this script is executing as a CommonJS module, use module.exports
          // as the regeneratorRuntime namespace. Otherwise create a new empty
          // object. Either way, the resulting object will be used to initialize
          // the regeneratorRuntime variable at the top of this file.
          module.exports );

          try {
            regeneratorRuntime = runtime;
          } catch (accidentalStrictMode) {
            // This module should not be running in strict mode, so the above
            // assignment should always work unless something is misconfigured. Just
            // in case runtime.js accidentally runs in strict mode, we can escape
            // strict mode using a global Function call. This could conceivably fail
            // if a Content Security Policy forbids using Function, but in that case
            // the proper solution is to fix the accidental strict mode problem. If
            // you've misconfigured your bundler to force strict mode and applied a
            // CSP to forbid Function, and you're not willing to fix either of those
            // problems, please detail your unique predicament in a GitHub issue.
            Function("r", "regeneratorRuntime = r")(runtime);
          }
        });

        var _marked$3 = /*#__PURE__*/regeneratorRuntime.mark(numbers);

        function number$1 (x) {
          return x === null ? NaN : +x;
        }
        function numbers(values, valueof) {
          var _iterator, _step, value, index, _iterator2, _step2, _value;

          return regeneratorRuntime.wrap(function numbers$(_context) {
            while (1) {
              switch (_context.prev = _context.next) {
                case 0:
                  if (!(valueof === undefined)) {
                    _context.next = 21;
                    break;
                  }

                  _iterator = _createForOfIteratorHelper(values);
                  _context.prev = 2;

                  _iterator.s();

                case 4:
                  if ((_step = _iterator.n()).done) {
                    _context.next = 11;
                    break;
                  }

                  value = _step.value;

                  if (!(value != null && (value = +value) >= value)) {
                    _context.next = 9;
                    break;
                  }

                  _context.next = 9;
                  return value;

                case 9:
                  _context.next = 4;
                  break;

                case 11:
                  _context.next = 16;
                  break;

                case 13:
                  _context.prev = 13;
                  _context.t0 = _context["catch"](2);

                  _iterator.e(_context.t0);

                case 16:
                  _context.prev = 16;

                  _iterator.f();

                  return _context.finish(16);

                case 19:
                  _context.next = 40;
                  break;

                case 21:
                  index = -1;
                  _iterator2 = _createForOfIteratorHelper(values);
                  _context.prev = 23;

                  _iterator2.s();

                case 25:
                  if ((_step2 = _iterator2.n()).done) {
                    _context.next = 32;
                    break;
                  }

                  _value = _step2.value;

                  if (!((_value = valueof(_value, ++index, values)) != null && (_value = +_value) >= _value)) {
                    _context.next = 30;
                    break;
                  }

                  _context.next = 30;
                  return _value;

                case 30:
                  _context.next = 25;
                  break;

                case 32:
                  _context.next = 37;
                  break;

                case 34:
                  _context.prev = 34;
                  _context.t1 = _context["catch"](23);

                  _iterator2.e(_context.t1);

                case 37:
                  _context.prev = 37;

                  _iterator2.f();

                  return _context.finish(37);

                case 40:
                case "end":
                  return _context.stop();
              }
            }
          }, _marked$3, null, [[2, 13, 16, 19], [23, 34, 37, 40]]);
        }

        var ascendingBisect = d3_bisector(d3_ascending);
        var bisectRight = ascendingBisect.right;
        d3_bisector(number$1).center;

        var INCORRECT_ITERATION = !checkCorrectnessOfIteration(function (iterable) {
          // eslint-disable-next-line es/no-array-from -- required for testing
          Array.from(iterable);
        });

        // `Array.from` method
        // https://tc39.es/ecma262/#sec-array.from
        _export({ target: 'Array', stat: true, forced: INCORRECT_ITERATION }, {
          from: arrayFrom
        });

        // `Array.prototype.fill` method
        // https://tc39.es/ecma262/#sec-array.prototype.fill
        _export({ target: 'Array', proto: true }, {
          fill: arrayFill
        });

        // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
        addToUnscopables('fill');

        var $some = arrayIteration.some;


        var STRICT_METHOD$3 = arrayMethodIsStrict('some');

        // `Array.prototype.some` method
        // https://tc39.es/ecma262/#sec-array.prototype.some
        _export({ target: 'Array', proto: true, forced: !STRICT_METHOD$3 }, {
          some: function some(callbackfn /* , thisArg */) {
            return $some(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          }
        });

        var exportTypedArrayStaticMethod = arrayBufferViewCore.exportTypedArrayStaticMethod;


        // `%TypedArray%.from` method
        // https://tc39.es/ecma262/#sec-%typedarray%.from
        exportTypedArrayStaticMethod('from', typedArrayFrom, typedArrayConstructorsRequireWrappers);

        // `Float64Array` constructor
        // https://tc39.es/ecma262/#sec-typedarray-objects
        typedArrayConstructor('Float64', function (init) {
          return function Float64Array(data, byteOffset, length) {
            return init(this, data, byteOffset, length);
          };
        });

        function d3_descending (a, b) {
          return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
        }

        // https://github.com/python/cpython/blob/a74eea238f5baba15797e2e8b570d153bc8690a7/Modules/mathmodule.c#L1423
        var Adder = /*#__PURE__*/function () {
          function Adder() {
            _classCallCheck$1(this, Adder);

            this._partials = new Float64Array(32);
            this._n = 0;
          }

          _createClass$1(Adder, [{
            key: "add",
            value: function add(x) {
              var p = this._partials;
              var i = 0;

              for (var j = 0; j < this._n && j < 32; j++) {
                var y = p[j],
                    hi = x + y,
                    lo = Math.abs(x) < Math.abs(y) ? x - (hi - y) : y - (hi - x);
                if (lo) p[i++] = lo;
                x = hi;
              }

              p[i] = x;
              this._n = i + 1;
              return this;
            }
          }, {
            key: "valueOf",
            value: function valueOf() {
              var p = this._partials;
              var n = this._n,
                  x,
                  y,
                  lo,
                  hi = 0;

              if (n > 0) {
                hi = p[--n];

                while (n > 0) {
                  x = hi;
                  y = p[--n];
                  hi = x + y;
                  lo = y - (hi - x);
                  if (lo) break;
                }

                if (n > 0 && (lo < 0 && p[n - 1] < 0 || lo > 0 && p[n - 1] > 0)) {
                  y = lo * 2;
                  x = hi + y;
                  if (y == x - hi) hi = x;
                }
              }

              return hi;
            }
          }]);

          return Adder;
        }();

        // `Object.defineProperties` method
        // https://tc39.es/ecma262/#sec-object.defineproperties
        _export({ target: 'Object', stat: true, forced: !descriptors, sham: !descriptors }, {
          defineProperties: objectDefineProperties
        });

        // `Map` constructor
        // https://tc39.es/ecma262/#sec-map-objects
        collection('Map', function (init) {
          return function Map() { return init(this, arguments.length ? arguments[0] : undefined); };
        }, collectionStrong);

        var test = [];
        var nativeSort = test.sort;

        // IE8-
        var FAILS_ON_UNDEFINED = fails(function () {
          test.sort(undefined);
        });
        // V8 bug
        var FAILS_ON_NULL = fails(function () {
          test.sort(null);
        });
        // Old WebKit
        var STRICT_METHOD$2 = arrayMethodIsStrict('sort');

        var STABLE_SORT = !fails(function () {
          // feature detection can be too slow, so check engines versions
          if (engineV8Version) return engineV8Version < 70;
          if (engineFfVersion && engineFfVersion > 3) return;
          if (engineIsIeOrEdge) return true;
          if (engineWebkitVersion) return engineWebkitVersion < 603;

          var result = '';
          var code, chr, value, index;

          // generate an array with more 512 elements (Chakra and old V8 fails only in this case)
          for (code = 65; code < 76; code++) {
            chr = String.fromCharCode(code);

            switch (code) {
              case 66: case 69: case 70: case 72: value = 3; break;
              case 68: case 71: value = 4; break;
              default: value = 2;
            }

            for (index = 0; index < 47; index++) {
              test.push({ k: chr + index, v: value });
            }
          }

          test.sort(function (a, b) { return b.v - a.v; });

          for (index = 0; index < test.length; index++) {
            chr = test[index].k.charAt(0);
            if (result.charAt(result.length - 1) !== chr) result += chr;
          }

          return result !== 'DGBEFHACIJK';
        });

        var FORCED$5 = FAILS_ON_UNDEFINED || !FAILS_ON_NULL || !STRICT_METHOD$2 || !STABLE_SORT;

        var getSortCompare = function (comparefn) {
          return function (x, y) {
            if (y === undefined) return -1;
            if (x === undefined) return 1;
            if (comparefn !== undefined) return +comparefn(x, y) || 0;
            return String(x) > String(y) ? 1 : -1;
          };
        };

        // `Array.prototype.sort` method
        // https://tc39.es/ecma262/#sec-array.prototype.sort
        _export({ target: 'Array', proto: true, forced: FORCED$5 }, {
          sort: function sort(comparefn) {
            if (comparefn !== undefined) aFunction(comparefn);

            var array = toObject(this);

            if (STABLE_SORT) return comparefn === undefined ? nativeSort.call(array) : nativeSort.call(array, comparefn);

            var items = [];
            var arrayLength = toLength(array.length);
            var itemsLength, index;

            for (index = 0; index < arrayLength; index++) {
              if (index in array) items.push(array[index]);
            }

            items = arraySort(items, getSortCompare(comparefn));
            itemsLength = items.length;
            index = 0;

            while (index < itemsLength) array[index] = items[index++];
            while (index < arrayLength) delete array[index++];

            return array;
          }
        });

        var e10 = Math.sqrt(50),
            e5 = Math.sqrt(10),
            e2 = Math.sqrt(2);
        function ticks (start, stop, count) {
          var reverse,
              i = -1,
              n,
              ticks,
              step;
          stop = +stop, start = +start, count = +count;
          if (start === stop && count > 0) return [start];
          if (reverse = stop < start) n = start, start = stop, stop = n;
          if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) return [];

          if (step > 0) {
            var r0 = Math.round(start / step),
                r1 = Math.round(stop / step);
            if (r0 * step < start) ++r0;
            if (r1 * step > stop) --r1;
            ticks = new Array(n = r1 - r0 + 1);

            while (++i < n) {
              ticks[i] = (r0 + i) * step;
            }
          } else {
            step = -step;

            var _r = Math.round(start * step),
                _r2 = Math.round(stop * step);

            if (_r / step < start) ++_r;
            if (_r2 / step > stop) --_r2;
            ticks = new Array(n = _r2 - _r + 1);

            while (++i < n) {
              ticks[i] = (_r + i) / step;
            }
          }

          if (reverse) ticks.reverse();
          return ticks;
        }
        function tickIncrement(start, stop, count) {
          var step = (stop - start) / Math.max(0, count),
              power = Math.floor(Math.log(step) / Math.LN10),
              error = step / Math.pow(10, power);
          return power >= 0 ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power) : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);
        }
        function tickStep(start, stop, count) {
          var step0 = Math.abs(stop - start) / Math.max(0, count),
              step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
              error = step0 / step1;
          if (error >= e10) step1 *= 10;else if (error >= e5) step1 *= 5;else if (error >= e2) step1 *= 2;
          return stop < start ? -step1 : step1;
        }

        function max(values, valueof) {
          var max;

          if (valueof === undefined) {
            var _iterator = _createForOfIteratorHelper(values),
                _step;

            try {
              for (_iterator.s(); !(_step = _iterator.n()).done;) {
                var value = _step.value;

                if (value != null && (max < value || max === undefined && value >= value)) {
                  max = value;
                }
              }
            } catch (err) {
              _iterator.e(err);
            } finally {
              _iterator.f();
            }
          } else {
            var index = -1;

            var _iterator2 = _createForOfIteratorHelper(values),
                _step2;

            try {
              for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
                var _value = _step2.value;

                if ((_value = valueof(_value, ++index, values)) != null && (max < _value || max === undefined && _value >= _value)) {
                  max = _value;
                }
              }
            } catch (err) {
              _iterator2.e(err);
            } finally {
              _iterator2.f();
            }
          }

          return max;
        }

        function min$2(values, valueof) {
          var min;

          if (valueof === undefined) {
            var _iterator = _createForOfIteratorHelper(values),
                _step;

            try {
              for (_iterator.s(); !(_step = _iterator.n()).done;) {
                var value = _step.value;

                if (value != null && (min > value || min === undefined && value >= value)) {
                  min = value;
                }
              }
            } catch (err) {
              _iterator.e(err);
            } finally {
              _iterator.f();
            }
          } else {
            var index = -1;

            var _iterator2 = _createForOfIteratorHelper(values),
                _step2;

            try {
              for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
                var _value = _step2.value;

                if ((_value = valueof(_value, ++index, values)) != null && (min > _value || min === undefined && _value >= _value)) {
                  min = _value;
                }
              }
            } catch (err) {
              _iterator2.e(err);
            } finally {
              _iterator2.f();
            }
          }

          return min;
        }

        // ISC license, Copyright 2018 Vladimir Agafonkin.

        function quickselect$2(array, k) {
          var left = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;
          var right = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : array.length - 1;
          var compare = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : d3_ascending;

          while (right > left) {
            if (right - left > 600) {
              var n = right - left + 1;
              var m = k - left + 1;
              var z = Math.log(n);
              var s = 0.5 * Math.exp(2 * z / 3);
              var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
              var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
              var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
              quickselect$2(array, k, newLeft, newRight, compare);
            }

            var t = array[k];
            var i = left;
            var j = right;
            swap$1(array, left, k);
            if (compare(array[right], t) > 0) swap$1(array, left, right);

            while (i < j) {
              swap$1(array, i, j), ++i, --j;

              while (compare(array[i], t) < 0) {
                ++i;
              }

              while (compare(array[j], t) > 0) {
                --j;
              }
            }

            if (compare(array[left], t) === 0) swap$1(array, left, j);else ++j, swap$1(array, j, right);
            if (j <= k) left = j + 1;
            if (k <= j) right = j - 1;
          }

          return array;
        }

        function swap$1(array, i, j) {
          var t = array[i];
          array[i] = array[j];
          array[j] = t;
        }

        function quantile(values, p, valueof) {
          values = Float64Array.from(numbers(values, valueof));
          if (!(n = values.length)) return;
          if ((p = +p) <= 0 || n < 2) return min$2(values);
          if (p >= 1) return max(values);
          var n,
              i = (n - 1) * p,
              i0 = Math.floor(i),
              value0 = max(quickselect$2(values, i0).subarray(0, i0 + 1)),
              value1 = min$2(values.subarray(i0 + 1));
          return value0 + (value1 - value0) * (i - i0);
        }

        function d3_median (values, valueof) {
          return quantile(values, 0.5, valueof);
        }

        var _marked$2 = /*#__PURE__*/regeneratorRuntime.mark(flatten);

        function flatten(arrays) {
          var _iterator, _step, array;

          return regeneratorRuntime.wrap(function flatten$(_context) {
            while (1) {
              switch (_context.prev = _context.next) {
                case 0:
                  _iterator = _createForOfIteratorHelper(arrays);
                  _context.prev = 1;

                  _iterator.s();

                case 3:
                  if ((_step = _iterator.n()).done) {
                    _context.next = 8;
                    break;
                  }

                  array = _step.value;
                  return _context.delegateYield(array, "t0", 6);

                case 6:
                  _context.next = 3;
                  break;

                case 8:
                  _context.next = 13;
                  break;

                case 10:
                  _context.prev = 10;
                  _context.t1 = _context["catch"](1);

                  _iterator.e(_context.t1);

                case 13:
                  _context.prev = 13;

                  _iterator.f();

                  return _context.finish(13);

                case 16:
                case "end":
                  return _context.stop();
              }
            }
          }, _marked$2, null, [[1, 10, 13, 16]]);
        }

        function merge$4(arrays) {
          return Array.from(flatten(arrays));
        }

        function range$1 (start, stop, step) {
          start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
          var i = -1,
              n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
              range = new Array(n);

          while (++i < n) {
            range[i] = start + i * step;
          }

          return range;
        }

        // `SameValue` abstract operation
        // https://tc39.es/ecma262/#sec-samevalue
        // eslint-disable-next-line es/no-object-is -- safe
        var sameValue = Object.is || function is(x, y) {
          // eslint-disable-next-line no-self-compare -- NaN check
          return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;
        };

        // eslint-disable-next-line es/no-math-hypot -- required for testing
        var $hypot = Math.hypot;
        var abs$3 = Math.abs;
        var sqrt$1 = Math.sqrt;

        // Chrome 77 bug
        // https://bugs.chromium.org/p/v8/issues/detail?id=9546
        var BUGGY = !!$hypot && $hypot(Infinity, NaN) !== Infinity;

        // `Math.hypot` method
        // https://tc39.es/ecma262/#sec-math.hypot
        _export({ target: 'Math', stat: true, forced: BUGGY }, {
          // eslint-disable-next-line no-unused-vars -- required for `.length`
          hypot: function hypot(value1, value2) {
            var sum = 0;
            var i = 0;
            var aLen = arguments.length;
            var larg = 0;
            var arg, div;
            while (i < aLen) {
              arg = abs$3(arguments[i++]);
              if (larg < arg) {
                div = larg / arg;
                sum = sum * div * div + 1;
                larg = arg;
              } else if (arg > 0) {
                div = arg / larg;
                sum += div * div;
              } else sum += arg;
            }
            return larg === Infinity ? Infinity : larg * sqrt$1(sum);
          }
        });

        // `Math.sign` method implementation
        // https://tc39.es/ecma262/#sec-math.sign
        // eslint-disable-next-line es/no-math-sign -- safe
        var mathSign = Math.sign || function sign(x) {
          // eslint-disable-next-line no-self-compare -- NaN check
          return (x = +x) == 0 || x != x ? x : x < 0 ? -1 : 1;
        };

        // `Math.sign` method
        // https://tc39.es/ecma262/#sec-math.sign
        _export({ target: 'Math', stat: true }, {
          sign: mathSign
        });

        var epsilon$1 = 1e-6;
        var epsilon2$1 = 1e-12;
        var pi = Math.PI;
        var halfPi = pi / 2;
        var quarterPi = pi / 4;
        var tau = pi * 2;
        var degrees$1 = 180 / pi;
        var radians = pi / 180;
        var abs$2 = Math.abs;
        var atan = Math.atan;
        var atan2 = Math.atan2;
        var cos = Math.cos;
        var exp$2 = Math.exp;
        var log$1 = Math.log;
        var sin = Math.sin;
        var sign = Math.sign || function (x) {
          return x > 0 ? 1 : x < 0 ? -1 : 0;
        };
        var sqrt = Math.sqrt;
        var tan = Math.tan;
        function acos(x) {
          return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
        }
        function asin(x) {
          return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);
        }

        function noop$1() {}

        function streamGeometry(geometry, stream) {
          if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
            streamGeometryType[geometry.type](geometry, stream);
          }
        }

        var streamObjectType = {
          Feature: function Feature(object, stream) {
            streamGeometry(object.geometry, stream);
          },
          FeatureCollection: function FeatureCollection(object, stream) {
            var features = object.features,
                i = -1,
                n = features.length;

            while (++i < n) {
              streamGeometry(features[i].geometry, stream);
            }
          }
        };
        var streamGeometryType = {
          Sphere: function Sphere(object, stream) {
            stream.sphere();
          },
          Point: function Point(object, stream) {
            object = object.coordinates;
            stream.point(object[0], object[1], object[2]);
          },
          MultiPoint: function MultiPoint(object, stream) {
            var coordinates = object.coordinates,
                i = -1,
                n = coordinates.length;

            while (++i < n) {
              object = coordinates[i], stream.point(object[0], object[1], object[2]);
            }
          },
          LineString: function LineString(object, stream) {
            streamLine(object.coordinates, stream, 0);
          },
          MultiLineString: function MultiLineString(object, stream) {
            var coordinates = object.coordinates,
                i = -1,
                n = coordinates.length;

            while (++i < n) {
              streamLine(coordinates[i], stream, 0);
            }
          },
          Polygon: function Polygon(object, stream) {
            streamPolygon(object.coordinates, stream);
          },
          MultiPolygon: function MultiPolygon(object, stream) {
            var coordinates = object.coordinates,
                i = -1,
                n = coordinates.length;

            while (++i < n) {
              streamPolygon(coordinates[i], stream);
            }
          },
          GeometryCollection: function GeometryCollection(object, stream) {
            var geometries = object.geometries,
                i = -1,
                n = geometries.length;

            while (++i < n) {
              streamGeometry(geometries[i], stream);
            }
          }
        };

        function streamLine(coordinates, stream, closed) {
          var i = -1,
              n = coordinates.length - closed,
              coordinate;
          stream.lineStart();

          while (++i < n) {
            coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
          }

          stream.lineEnd();
        }

        function streamPolygon(coordinates, stream) {
          var i = -1,
              n = coordinates.length;
          stream.polygonStart();

          while (++i < n) {
            streamLine(coordinates[i], stream, 1);
          }

          stream.polygonEnd();
        }

        function d3_geoStream (object, stream) {
          if (object && streamObjectType.hasOwnProperty(object.type)) {
            streamObjectType[object.type](object, stream);
          } else {
            streamGeometry(object, stream);
          }
        }

        var areaRingSum$1 = new Adder(); // hello?

        var areaSum$1 = new Adder(),
            lambda00$1,
            phi00$1,
            lambda0$2,
            cosPhi0$1,
            sinPhi0$1;
        var areaStream$1 = {
          point: noop$1,
          lineStart: noop$1,
          lineEnd: noop$1,
          polygonStart: function polygonStart() {
            areaRingSum$1 = new Adder();
            areaStream$1.lineStart = areaRingStart$1;
            areaStream$1.lineEnd = areaRingEnd$1;
          },
          polygonEnd: function polygonEnd() {
            var areaRing = +areaRingSum$1;
            areaSum$1.add(areaRing < 0 ? tau + areaRing : areaRing);
            this.lineStart = this.lineEnd = this.point = noop$1;
          },
          sphere: function sphere() {
            areaSum$1.add(tau);
          }
        };

        function areaRingStart$1() {
          areaStream$1.point = areaPointFirst$1;
        }

        function areaRingEnd$1() {
          areaPoint$1(lambda00$1, phi00$1);
        }

        function areaPointFirst$1(lambda, phi) {
          areaStream$1.point = areaPoint$1;
          lambda00$1 = lambda, phi00$1 = phi;
          lambda *= radians, phi *= radians;
          lambda0$2 = lambda, cosPhi0$1 = cos(phi = phi / 2 + quarterPi), sinPhi0$1 = sin(phi);
        }

        function areaPoint$1(lambda, phi) {
          lambda *= radians, phi *= radians;
          phi = phi / 2 + quarterPi; // half the angular distance from south pole
          // Spherical excess E for a spherical triangle with vertices: south pole,
          // previous point, current point.  Uses a formula derived from Cagnoli’s
          // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).

          var dLambda = lambda - lambda0$2,
              sdLambda = dLambda >= 0 ? 1 : -1,
              adLambda = sdLambda * dLambda,
              cosPhi = cos(phi),
              sinPhi = sin(phi),
              k = sinPhi0$1 * sinPhi,
              u = cosPhi0$1 * cosPhi + k * cos(adLambda),
              v = k * sdLambda * sin(adLambda);
          areaRingSum$1.add(atan2(v, u)); // Advance the previous points.

          lambda0$2 = lambda, cosPhi0$1 = cosPhi, sinPhi0$1 = sinPhi;
        }

        function d3_geoArea (object) {
          areaSum$1 = new Adder();
          d3_geoStream(object, areaStream$1);
          return areaSum$1 * 2;
        }

        function spherical(cartesian) {
          return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
        }
        function cartesian(spherical) {
          var lambda = spherical[0],
              phi = spherical[1],
              cosPhi = cos(phi);
          return [cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi)];
        }
        function cartesianDot(a, b) {
          return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
        }
        function cartesianCross(a, b) {
          return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
        } // TODO return a

        function cartesianAddInPlace(a, b) {
          a[0] += b[0], a[1] += b[1], a[2] += b[2];
        }
        function cartesianScale(vector, k) {
          return [vector[0] * k, vector[1] * k, vector[2] * k];
        } // TODO return d

        function cartesianNormalizeInPlace(d) {
          var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
          d[0] /= l, d[1] /= l, d[2] /= l;
        }

        var lambda0$1, phi0, lambda1, phi1, // bounds
        lambda2, // previous lambda-coordinate
        lambda00, phi00, // first point
        p0, // previous 3D point
        deltaSum, ranges, range;
        var boundsStream$1 = {
          point: boundsPoint$1,
          lineStart: boundsLineStart,
          lineEnd: boundsLineEnd,
          polygonStart: function polygonStart() {
            boundsStream$1.point = boundsRingPoint;
            boundsStream$1.lineStart = boundsRingStart;
            boundsStream$1.lineEnd = boundsRingEnd;
            deltaSum = new Adder();
            areaStream$1.polygonStart();
          },
          polygonEnd: function polygonEnd() {
            areaStream$1.polygonEnd();
            boundsStream$1.point = boundsPoint$1;
            boundsStream$1.lineStart = boundsLineStart;
            boundsStream$1.lineEnd = boundsLineEnd;
            if (areaRingSum$1 < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);else if (deltaSum > epsilon$1) phi1 = 90;else if (deltaSum < -epsilon$1) phi0 = -90;
            range[0] = lambda0$1, range[1] = lambda1;
          },
          sphere: function sphere() {
            lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
          }
        };

        function boundsPoint$1(lambda, phi) {
          ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
          if (phi < phi0) phi0 = phi;
          if (phi > phi1) phi1 = phi;
        }

        function linePoint(lambda, phi) {
          var p = cartesian([lambda * radians, phi * radians]);

          if (p0) {
            var normal = cartesianCross(p0, p),
                equatorial = [normal[1], -normal[0], 0],
                inflection = cartesianCross(equatorial, normal);
            cartesianNormalizeInPlace(inflection);
            inflection = spherical(inflection);
            var delta = lambda - lambda2,
                sign = delta > 0 ? 1 : -1,
                lambdai = inflection[0] * degrees$1 * sign,
                phii,
                antimeridian = abs$2(delta) > 180;

            if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
              phii = inflection[1] * degrees$1;
              if (phii > phi1) phi1 = phii;
            } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
              phii = -inflection[1] * degrees$1;
              if (phii < phi0) phi0 = phii;
            } else {
              if (phi < phi0) phi0 = phi;
              if (phi > phi1) phi1 = phi;
            }

            if (antimeridian) {
              if (lambda < lambda2) {
                if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
              } else {
                if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
              }
            } else {
              if (lambda1 >= lambda0$1) {
                if (lambda < lambda0$1) lambda0$1 = lambda;
                if (lambda > lambda1) lambda1 = lambda;
              } else {
                if (lambda > lambda2) {
                  if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
                } else {
                  if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
                }
              }
            }
          } else {
            ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
          }

          if (phi < phi0) phi0 = phi;
          if (phi > phi1) phi1 = phi;
          p0 = p, lambda2 = lambda;
        }

        function boundsLineStart() {
          boundsStream$1.point = linePoint;
        }

        function boundsLineEnd() {
          range[0] = lambda0$1, range[1] = lambda1;
          boundsStream$1.point = boundsPoint$1;
          p0 = null;
        }

        function boundsRingPoint(lambda, phi) {
          if (p0) {
            var delta = lambda - lambda2;
            deltaSum.add(abs$2(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
          } else {
            lambda00 = lambda, phi00 = phi;
          }

          areaStream$1.point(lambda, phi);
          linePoint(lambda, phi);
        }

        function boundsRingStart() {
          areaStream$1.lineStart();
        }

        function boundsRingEnd() {
          boundsRingPoint(lambda00, phi00);
          areaStream$1.lineEnd();
          if (abs$2(deltaSum) > epsilon$1) lambda0$1 = -(lambda1 = 180);
          range[0] = lambda0$1, range[1] = lambda1;
          p0 = null;
        } // Finds the left-right distance between two longitudes.
        // This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
        // the distance between ±180° to be 360°.


        function angle(lambda0, lambda1) {
          return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
        }

        function rangeCompare(a, b) {
          return a[0] - b[0];
        }

        function rangeContains(range, x) {
          return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
        }

        function d3_geoBounds (feature) {
          var i, n, a, b, merged, deltaMax, delta;
          phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
          ranges = [];
          d3_geoStream(feature, boundsStream$1); // First, sort ranges by their minimum longitudes.

          if (n = ranges.length) {
            ranges.sort(rangeCompare); // Then, merge any ranges that overlap.

            for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
              b = ranges[i];

              if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
                if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
                if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
              } else {
                merged.push(a = b);
              }
            } // Finally, find the largest gap between the merged ranges.
            // The final bounding box will be the inverse of this gap.


            for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
              b = merged[i];
              if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];
            }
          }

          ranges = range = null;
          return lambda0$1 === Infinity || phi0 === Infinity ? [[NaN, NaN], [NaN, NaN]] : [[lambda0$1, phi0], [lambda1, phi1]];
        }

        function compose (a, b) {
          function compose(x, y) {
            return x = a(x, y), b(x[0], x[1]);
          }

          if (a.invert && b.invert) compose.invert = function (x, y) {
            return x = b.invert(x, y), x && a.invert(x[0], x[1]);
          };
          return compose;
        }

        function rotationIdentity(lambda, phi) {
          return [abs$2(lambda) > pi ? lambda + Math.round(-lambda / tau) * tau : lambda, phi];
        }

        rotationIdentity.invert = rotationIdentity;
        function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
          return (deltaLambda %= tau) ? deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma)) : rotationLambda(deltaLambda) : deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma) : rotationIdentity;
        }

        function forwardRotationLambda(deltaLambda) {
          return function (lambda, phi) {
            return lambda += deltaLambda, [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];
          };
        }

        function rotationLambda(deltaLambda) {
          var rotation = forwardRotationLambda(deltaLambda);
          rotation.invert = forwardRotationLambda(-deltaLambda);
          return rotation;
        }

        function rotationPhiGamma(deltaPhi, deltaGamma) {
          var cosDeltaPhi = cos(deltaPhi),
              sinDeltaPhi = sin(deltaPhi),
              cosDeltaGamma = cos(deltaGamma),
              sinDeltaGamma = sin(deltaGamma);

          function rotation(lambda, phi) {
            var cosPhi = cos(phi),
                x = cos(lambda) * cosPhi,
                y = sin(lambda) * cosPhi,
                z = sin(phi),
                k = z * cosDeltaPhi + x * sinDeltaPhi;
            return [atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi), asin(k * cosDeltaGamma + y * sinDeltaGamma)];
          }

          rotation.invert = function (lambda, phi) {
            var cosPhi = cos(phi),
                x = cos(lambda) * cosPhi,
                y = sin(lambda) * cosPhi,
                z = sin(phi),
                k = z * cosDeltaGamma - y * sinDeltaGamma;
            return [atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi), asin(k * cosDeltaPhi - x * sinDeltaPhi)];
          };

          return rotation;
        }

        function rotation (rotate) {
          rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);

          function forward(coordinates) {
            coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
            return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
          }

          forward.invert = function (coordinates) {
            coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
            return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
          };

          return forward;
        }

        function circleStream(stream, radius, delta, direction, t0, t1) {
          if (!delta) return;
          var cosRadius = cos(radius),
              sinRadius = sin(radius),
              step = direction * delta;

          if (t0 == null) {
            t0 = radius + direction * tau;
            t1 = radius - step / 2;
          } else {
            t0 = circleRadius(cosRadius, t0);
            t1 = circleRadius(cosRadius, t1);
            if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau;
          }

          for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
            point = spherical([cosRadius, -sinRadius * cos(t), -sinRadius * sin(t)]);
            stream.point(point[0], point[1]);
          }
        } // Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].

        function circleRadius(cosRadius, point) {
          point = cartesian(point), point[0] -= cosRadius;
          cartesianNormalizeInPlace(point);
          var radius = acos(-point[1]);
          return ((-point[2] < 0 ? -radius : radius) + tau - epsilon$1) % tau;
        }

        function clipBuffer () {
          var lines = [],
              line;
          return {
            point: function point(x, y, m) {
              line.push([x, y, m]);
            },
            lineStart: function lineStart() {
              lines.push(line = []);
            },
            lineEnd: noop$1,
            rejoin: function rejoin() {
              if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
            },
            result: function result() {
              var result = lines;
              lines = [];
              line = null;
              return result;
            }
          };
        }

        function pointEqual (a, b) {
          return abs$2(a[0] - b[0]) < epsilon$1 && abs$2(a[1] - b[1]) < epsilon$1;
        }

        function Intersection(point, points, other, entry) {
          this.x = point;
          this.z = points;
          this.o = other; // another intersection

          this.e = entry; // is an entry?

          this.v = false; // visited

          this.n = this.p = null; // next & previous
        } // A generalized polygon clipping algorithm: given a polygon that has been cut
        // into its visible line segments, and rejoins the segments by interpolating
        // along the clip edge.


        function clipRejoin (segments, compareIntersection, startInside, interpolate, stream) {
          var subject = [],
              clip = [],
              i,
              n;
          segments.forEach(function (segment) {
            if ((n = segment.length - 1) <= 0) return;
            var n,
                p0 = segment[0],
                p1 = segment[n],
                x;

            if (pointEqual(p0, p1)) {
              if (!p0[2] && !p1[2]) {
                stream.lineStart();

                for (i = 0; i < n; ++i) {
                  stream.point((p0 = segment[i])[0], p0[1]);
                }

                stream.lineEnd();
                return;
              } // handle degenerate cases by moving the point


              p1[0] += 2 * epsilon$1;
            }

            subject.push(x = new Intersection(p0, segment, null, true));
            clip.push(x.o = new Intersection(p0, null, x, false));
            subject.push(x = new Intersection(p1, segment, null, false));
            clip.push(x.o = new Intersection(p1, null, x, true));
          });
          if (!subject.length) return;
          clip.sort(compareIntersection);
          link(subject);
          link(clip);

          for (i = 0, n = clip.length; i < n; ++i) {
            clip[i].e = startInside = !startInside;
          }

          var start = subject[0],
              points,
              point;

          while (1) {
            // Find first unvisited intersection.
            var current = start,
                isSubject = true;

            while (current.v) {
              if ((current = current.n) === start) return;
            }

            points = current.z;
            stream.lineStart();

            do {
              current.v = current.o.v = true;

              if (current.e) {
                if (isSubject) {
                  for (i = 0, n = points.length; i < n; ++i) {
                    stream.point((point = points[i])[0], point[1]);
                  }
                } else {
                  interpolate(current.x, current.n.x, 1, stream);
                }

                current = current.n;
              } else {
                if (isSubject) {
                  points = current.p.z;

                  for (i = points.length - 1; i >= 0; --i) {
                    stream.point((point = points[i])[0], point[1]);
                  }
                } else {
                  interpolate(current.x, current.p.x, -1, stream);
                }

                current = current.p;
              }

              current = current.o;
              points = current.z;
              isSubject = !isSubject;
            } while (!current.v);

            stream.lineEnd();
          }
        }

        function link(array) {
          if (!(n = array.length)) return;
          var n,
              i = 0,
              a = array[0],
              b;

          while (++i < n) {
            a.n = b = array[i];
            b.p = a;
            a = b;
          }

          a.n = b = array[0];
          b.p = a;
        }

        function longitude(point) {
          if (abs$2(point[0]) <= pi) return point[0];else return sign(point[0]) * ((abs$2(point[0]) + pi) % tau - pi);
        }

        function polygonContains (polygon, point) {
          var lambda = longitude(point),
              phi = point[1],
              sinPhi = sin(phi),
              normal = [sin(lambda), -cos(lambda), 0],
              angle = 0,
              winding = 0;
          var sum = new Adder();
          if (sinPhi === 1) phi = halfPi + epsilon$1;else if (sinPhi === -1) phi = -halfPi - epsilon$1;

          for (var i = 0, n = polygon.length; i < n; ++i) {
            if (!(m = (ring = polygon[i]).length)) continue;
            var ring,
                m,
                point0 = ring[m - 1],
                lambda0 = longitude(point0),
                phi0 = point0[1] / 2 + quarterPi,
                sinPhi0 = sin(phi0),
                cosPhi0 = cos(phi0);

            for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
              var point1 = ring[j],
                  lambda1 = longitude(point1),
                  phi1 = point1[1] / 2 + quarterPi,
                  sinPhi1 = sin(phi1),
                  cosPhi1 = cos(phi1),
                  delta = lambda1 - lambda0,
                  sign = delta >= 0 ? 1 : -1,
                  absDelta = sign * delta,
                  antimeridian = absDelta > pi,
                  k = sinPhi0 * sinPhi1;
              sum.add(atan2(k * sign * sin(absDelta), cosPhi0 * cosPhi1 + k * cos(absDelta)));
              angle += antimeridian ? delta + sign * tau : delta; // Are the longitudes either side of the point’s meridian (lambda),
              // and are the latitudes smaller than the parallel (phi)?

              if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
                var arc = cartesianCross(cartesian(point0), cartesian(point1));
                cartesianNormalizeInPlace(arc);
                var intersection = cartesianCross(normal, arc);
                cartesianNormalizeInPlace(intersection);
                var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);

                if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
                  winding += antimeridian ^ delta >= 0 ? 1 : -1;
                }
              }
            }
          } // First, determine whether the South pole is inside or outside:
          //
          // It is inside if:
          // * the polygon winds around it in a clockwise direction.
          // * the polygon does not (cumulatively) wind around it, but has a negative
          //   (counter-clockwise) area.
          //
          // Second, count the (signed) number of times a segment crosses a lambda
          // from the point to the South pole.  If it is zero, then the point is the
          // same side as the South pole.


          return (angle < -epsilon$1 || angle < epsilon$1 && sum < -epsilon2$1) ^ winding & 1;
        }

        function clip (pointVisible, clipLine, interpolate, start) {
          return function (sink) {
            var line = clipLine(sink),
                ringBuffer = clipBuffer(),
                ringSink = clipLine(ringBuffer),
                polygonStarted = false,
                polygon,
                segments,
                ring;
            var clip = {
              point: point,
              lineStart: lineStart,
              lineEnd: lineEnd,
              polygonStart: function polygonStart() {
                clip.point = pointRing;
                clip.lineStart = ringStart;
                clip.lineEnd = ringEnd;
                segments = [];
                polygon = [];
              },
              polygonEnd: function polygonEnd() {
                clip.point = point;
                clip.lineStart = lineStart;
                clip.lineEnd = lineEnd;
                segments = merge$4(segments);
                var startInside = polygonContains(polygon, start);

                if (segments.length) {
                  if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
                  clipRejoin(segments, compareIntersection, startInside, interpolate, sink);
                } else if (startInside) {
                  if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
                  sink.lineStart();
                  interpolate(null, null, 1, sink);
                  sink.lineEnd();
                }

                if (polygonStarted) sink.polygonEnd(), polygonStarted = false;
                segments = polygon = null;
              },
              sphere: function sphere() {
                sink.polygonStart();
                sink.lineStart();
                interpolate(null, null, 1, sink);
                sink.lineEnd();
                sink.polygonEnd();
              }
            };

            function point(lambda, phi) {
              if (pointVisible(lambda, phi)) sink.point(lambda, phi);
            }

            function pointLine(lambda, phi) {
              line.point(lambda, phi);
            }

            function lineStart() {
              clip.point = pointLine;
              line.lineStart();
            }

            function lineEnd() {
              clip.point = point;
              line.lineEnd();
            }

            function pointRing(lambda, phi) {
              ring.push([lambda, phi]);
              ringSink.point(lambda, phi);
            }

            function ringStart() {
              ringSink.lineStart();
              ring = [];
            }

            function ringEnd() {
              pointRing(ring[0][0], ring[0][1]);
              ringSink.lineEnd();
              var clean = ringSink.clean(),
                  ringSegments = ringBuffer.result(),
                  i,
                  n = ringSegments.length,
                  m,
                  segment,
                  point;
              ring.pop();
              polygon.push(ring);
              ring = null;
              if (!n) return; // No intersections.

              if (clean & 1) {
                segment = ringSegments[0];

                if ((m = segment.length - 1) > 0) {
                  if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
                  sink.lineStart();

                  for (i = 0; i < m; ++i) {
                    sink.point((point = segment[i])[0], point[1]);
                  }

                  sink.lineEnd();
                }

                return;
              } // Rejoin connected segments.
              // TODO reuse ringBuffer.rejoin()?


              if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));
              segments.push(ringSegments.filter(validSegment));
            }

            return clip;
          };
        }

        function validSegment(segment) {
          return segment.length > 1;
        } // Intersections are sorted along the clip edge. For both antimeridian cutting
        // and circle clipping, the same comparison is used.


        function compareIntersection(a, b) {
          return ((a = a.x)[0] < 0 ? a[1] - halfPi - epsilon$1 : halfPi - a[1]) - ((b = b.x)[0] < 0 ? b[1] - halfPi - epsilon$1 : halfPi - b[1]);
        }

        var clipAntimeridian = clip(function () {
          return true;
        }, clipAntimeridianLine, clipAntimeridianInterpolate, [-pi, -halfPi]); // Takes a line and cuts into visible segments. Return values: 0 - there were
        // intersections or the line was empty; 1 - no intersections; 2 - there were
        // intersections, and the first and last segments should be rejoined.

        function clipAntimeridianLine(stream) {
          var lambda0 = NaN,
              phi0 = NaN,
              sign0 = NaN,
              _clean; // no intersections


          return {
            lineStart: function lineStart() {
              stream.lineStart();
              _clean = 1;
            },
            point: function point(lambda1, phi1) {
              var sign1 = lambda1 > 0 ? pi : -pi,
                  delta = abs$2(lambda1 - lambda0);

              if (abs$2(delta - pi) < epsilon$1) {
                // line crosses a pole
                stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi : -halfPi);
                stream.point(sign0, phi0);
                stream.lineEnd();
                stream.lineStart();
                stream.point(sign1, phi0);
                stream.point(lambda1, phi0);
                _clean = 0;
              } else if (sign0 !== sign1 && delta >= pi) {
                // line crosses antimeridian
                if (abs$2(lambda0 - sign0) < epsilon$1) lambda0 -= sign0 * epsilon$1; // handle degeneracies

                if (abs$2(lambda1 - sign1) < epsilon$1) lambda1 -= sign1 * epsilon$1;
                phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
                stream.point(sign0, phi0);
                stream.lineEnd();
                stream.lineStart();
                stream.point(sign1, phi0);
                _clean = 0;
              }

              stream.point(lambda0 = lambda1, phi0 = phi1);
              sign0 = sign1;
            },
            lineEnd: function lineEnd() {
              stream.lineEnd();
              lambda0 = phi0 = NaN;
            },
            clean: function clean() {
              return 2 - _clean; // if intersections, rejoin first and last segments
            }
          };
        }

        function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
          var cosPhi0,
              cosPhi1,
              sinLambda0Lambda1 = sin(lambda0 - lambda1);
          return abs$2(sinLambda0Lambda1) > epsilon$1 ? atan((sin(phi0) * (cosPhi1 = cos(phi1)) * sin(lambda1) - sin(phi1) * (cosPhi0 = cos(phi0)) * sin(lambda0)) / (cosPhi0 * cosPhi1 * sinLambda0Lambda1)) : (phi0 + phi1) / 2;
        }

        function clipAntimeridianInterpolate(from, to, direction, stream) {
          var phi;

          if (from == null) {
            phi = direction * halfPi;
            stream.point(-pi, phi);
            stream.point(0, phi);
            stream.point(pi, phi);
            stream.point(pi, 0);
            stream.point(pi, -phi);
            stream.point(0, -phi);
            stream.point(-pi, -phi);
            stream.point(-pi, 0);
            stream.point(-pi, phi);
          } else if (abs$2(from[0] - to[0]) > epsilon$1) {
            var lambda = from[0] < to[0] ? pi : -pi;
            phi = direction * lambda / 2;
            stream.point(-lambda, phi);
            stream.point(0, phi);
            stream.point(lambda, phi);
          } else {
            stream.point(to[0], to[1]);
          }
        }

        function clipCircle (radius) {
          var cr = cos(radius),
              delta = 6 * radians,
              smallRadius = cr > 0,
              notHemisphere = abs$2(cr) > epsilon$1; // TODO optimise for this common case

          function interpolate(from, to, direction, stream) {
            circleStream(stream, radius, delta, direction, from, to);
          }

          function visible(lambda, phi) {
            return cos(lambda) * cos(phi) > cr;
          } // Takes a line and cuts into visible segments. Return values used for polygon
          // clipping: 0 - there were intersections or the line was empty; 1 - no
          // intersections 2 - there were intersections, and the first and last segments
          // should be rejoined.


          function clipLine(stream) {
            var point0, // previous point
            c0, // code for previous point
            v0, // visibility of previous point
            v00, // visibility of first point
            _clean; // no intersections


            return {
              lineStart: function lineStart() {
                v00 = v0 = false;
                _clean = 1;
              },
              point: function point(lambda, phi) {
                var point1 = [lambda, phi],
                    point2,
                    v = visible(lambda, phi),
                    c = smallRadius ? v ? 0 : code(lambda, phi) : v ? code(lambda + (lambda < 0 ? pi : -pi), phi) : 0;
                if (!point0 && (v00 = v0 = v)) stream.lineStart();

                if (v !== v0) {
                  point2 = intersect(point0, point1);
                  if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2)) point1[2] = 1;
                }

                if (v !== v0) {
                  _clean = 0;

                  if (v) {
                    // outside going in
                    stream.lineStart();
                    point2 = intersect(point1, point0);
                    stream.point(point2[0], point2[1]);
                  } else {
                    // inside going out
                    point2 = intersect(point0, point1);
                    stream.point(point2[0], point2[1], 2);
                    stream.lineEnd();
                  }

                  point0 = point2;
                } else if (notHemisphere && point0 && smallRadius ^ v) {
                  var t; // If the codes for two points are different, or are both zero,
                  // and there this segment intersects with the small circle.

                  if (!(c & c0) && (t = intersect(point1, point0, true))) {
                    _clean = 0;

                    if (smallRadius) {
                      stream.lineStart();
                      stream.point(t[0][0], t[0][1]);
                      stream.point(t[1][0], t[1][1]);
                      stream.lineEnd();
                    } else {
                      stream.point(t[1][0], t[1][1]);
                      stream.lineEnd();
                      stream.lineStart();
                      stream.point(t[0][0], t[0][1], 3);
                    }
                  }
                }

                if (v && (!point0 || !pointEqual(point0, point1))) {
                  stream.point(point1[0], point1[1]);
                }

                point0 = point1, v0 = v, c0 = c;
              },
              lineEnd: function lineEnd() {
                if (v0) stream.lineEnd();
                point0 = null;
              },
              // Rejoin first and last segments if there were intersections and the first
              // and last points were visible.
              clean: function clean() {
                return _clean | (v00 && v0) << 1;
              }
            };
          } // Intersects the great circle between a and b with the clip circle.


          function intersect(a, b, two) {
            var pa = cartesian(a),
                pb = cartesian(b); // We have two planes, n1.p = d1 and n2.p = d2.
            // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).

            var n1 = [1, 0, 0],
                // normal
            n2 = cartesianCross(pa, pb),
                n2n2 = cartesianDot(n2, n2),
                n1n2 = n2[0],
                // cartesianDot(n1, n2),
            determinant = n2n2 - n1n2 * n1n2; // Two polar points.

            if (!determinant) return !two && a;
            var c1 = cr * n2n2 / determinant,
                c2 = -cr * n1n2 / determinant,
                n1xn2 = cartesianCross(n1, n2),
                A = cartesianScale(n1, c1),
                B = cartesianScale(n2, c2);
            cartesianAddInPlace(A, B); // Solve |p(t)|^2 = 1.

            var u = n1xn2,
                w = cartesianDot(A, u),
                uu = cartesianDot(u, u),
                t2 = w * w - uu * (cartesianDot(A, A) - 1);
            if (t2 < 0) return;
            var t = sqrt(t2),
                q = cartesianScale(u, (-w - t) / uu);
            cartesianAddInPlace(q, A);
            q = spherical(q);
            if (!two) return q; // Two intersection points.

            var lambda0 = a[0],
                lambda1 = b[0],
                phi0 = a[1],
                phi1 = b[1],
                z;
            if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;
            var delta = lambda1 - lambda0,
                polar = abs$2(delta - pi) < epsilon$1,
                meridian = polar || delta < epsilon$1;
            if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z; // Check that the first point is between a and b.

            if (meridian ? polar ? phi0 + phi1 > 0 ^ q[1] < (abs$2(q[0] - lambda0) < epsilon$1 ? phi0 : phi1) : phi0 <= q[1] && q[1] <= phi1 : delta > pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
              var q1 = cartesianScale(u, (-w + t) / uu);
              cartesianAddInPlace(q1, A);
              return [q, spherical(q1)];
            }
          } // Generates a 4-bit vector representing the location of a point relative to
          // the small circle's bounding box.


          function code(lambda, phi) {
            var r = smallRadius ? radius : pi - radius,
                code = 0;
            if (lambda < -r) code |= 1; // left
            else if (lambda > r) code |= 2; // right

            if (phi < -r) code |= 4; // below
            else if (phi > r) code |= 8; // above

            return code;
          }

          return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi, radius - pi]);
        }

        function clipLine (a, b, x0, y0, x1, y1) {
          var ax = a[0],
              ay = a[1],
              bx = b[0],
              by = b[1],
              t0 = 0,
              t1 = 1,
              dx = bx - ax,
              dy = by - ay,
              r;
          r = x0 - ax;
          if (!dx && r > 0) return;
          r /= dx;

          if (dx < 0) {
            if (r < t0) return;
            if (r < t1) t1 = r;
          } else if (dx > 0) {
            if (r > t1) return;
            if (r > t0) t0 = r;
          }

          r = x1 - ax;
          if (!dx && r < 0) return;
          r /= dx;

          if (dx < 0) {
            if (r > t1) return;
            if (r > t0) t0 = r;
          } else if (dx > 0) {
            if (r < t0) return;
            if (r < t1) t1 = r;
          }

          r = y0 - ay;
          if (!dy && r > 0) return;
          r /= dy;

          if (dy < 0) {
            if (r < t0) return;
            if (r < t1) t1 = r;
          } else if (dy > 0) {
            if (r > t1) return;
            if (r > t0) t0 = r;
          }

          r = y1 - ay;
          if (!dy && r < 0) return;
          r /= dy;

          if (dy < 0) {
            if (r > t1) return;
            if (r > t0) t0 = r;
          } else if (dy > 0) {
            if (r < t0) return;
            if (r < t1) t1 = r;
          }

          if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
          if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
          return true;
        }

        var clipMax = 1e9,
            clipMin = -clipMax; // TODO Use d3-polygon’s polygonContains here for the ring check?
        // TODO Eliminate duplicate buffering in clipBuffer and polygon.push?

        function clipRectangle(x0, y0, x1, y1) {
          function visible(x, y) {
            return x0 <= x && x <= x1 && y0 <= y && y <= y1;
          }

          function interpolate(from, to, direction, stream) {
            var a = 0,
                a1 = 0;

            if (from == null || (a = corner(from, direction)) !== (a1 = corner(to, direction)) || comparePoint(from, to) < 0 ^ direction > 0) {
              do {
                stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
              } while ((a = (a + direction + 4) % 4) !== a1);
            } else {
              stream.point(to[0], to[1]);
            }
          }

          function corner(p, direction) {
            return abs$2(p[0] - x0) < epsilon$1 ? direction > 0 ? 0 : 3 : abs$2(p[0] - x1) < epsilon$1 ? direction > 0 ? 2 : 1 : abs$2(p[1] - y0) < epsilon$1 ? direction > 0 ? 1 : 0 : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
          }

          function compareIntersection(a, b) {
            return comparePoint(a.x, b.x);
          }

          function comparePoint(a, b) {
            var ca = corner(a, 1),
                cb = corner(b, 1);
            return ca !== cb ? ca - cb : ca === 0 ? b[1] - a[1] : ca === 1 ? a[0] - b[0] : ca === 2 ? a[1] - b[1] : b[0] - a[0];
          }

          return function (stream) {
            var activeStream = stream,
                bufferStream = clipBuffer(),
                segments,
                polygon,
                ring,
                x__,
                y__,
                v__,
                // first point
            x_,
                y_,
                v_,
                // previous point
            first,
                clean;
            var clipStream = {
              point: point,
              lineStart: lineStart,
              lineEnd: lineEnd,
              polygonStart: polygonStart,
              polygonEnd: polygonEnd
            };

            function point(x, y) {
              if (visible(x, y)) activeStream.point(x, y);
            }

            function polygonInside() {
              var winding = 0;

              for (var i = 0, n = polygon.length; i < n; ++i) {
                for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
                  a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];

                  if (a1 <= y1) {
                    if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding;
                  } else {
                    if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding;
                  }
                }
              }

              return winding;
            } // Buffer geometry within a polygon and then clip it en masse.


            function polygonStart() {
              activeStream = bufferStream, segments = [], polygon = [], clean = true;
            }

            function polygonEnd() {
              var startInside = polygonInside(),
                  cleanInside = clean && startInside,
                  visible = (segments = merge$4(segments)).length;

              if (cleanInside || visible) {
                stream.polygonStart();

                if (cleanInside) {
                  stream.lineStart();
                  interpolate(null, null, 1, stream);
                  stream.lineEnd();
                }

                if (visible) {
                  clipRejoin(segments, compareIntersection, startInside, interpolate, stream);
                }

                stream.polygonEnd();
              }

              activeStream = stream, segments = polygon = ring = null;
            }

            function lineStart() {
              clipStream.point = linePoint;
              if (polygon) polygon.push(ring = []);
              first = true;
              v_ = false;
              x_ = y_ = NaN;
            } // TODO rather than special-case polygons, simply handle them separately.
            // Ideally, coincident intersection points should be jittered to avoid
            // clipping issues.


            function lineEnd() {
              if (segments) {
                linePoint(x__, y__);
                if (v__ && v_) bufferStream.rejoin();
                segments.push(bufferStream.result());
              }

              clipStream.point = point;
              if (v_) activeStream.lineEnd();
            }

            function linePoint(x, y) {
              var v = visible(x, y);
              if (polygon) ring.push([x, y]);

              if (first) {
                x__ = x, y__ = y, v__ = v;
                first = false;

                if (v) {
                  activeStream.lineStart();
                  activeStream.point(x, y);
                }
              } else {
                if (v && v_) activeStream.point(x, y);else {
                  var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
                      b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];

                  if (clipLine(a, b, x0, y0, x1, y1)) {
                    if (!v_) {
                      activeStream.lineStart();
                      activeStream.point(a[0], a[1]);
                    }

                    activeStream.point(b[0], b[1]);
                    if (!v) activeStream.lineEnd();
                    clean = false;
                  } else if (v) {
                    activeStream.lineStart();
                    activeStream.point(x, y);
                    clean = false;
                  }
                }
              }

              x_ = x, y_ = y, v_ = v;
            }

            return clipStream;
          };
        }

        var lengthSum$1, lambda0, sinPhi0, cosPhi0;
        var lengthStream$1 = {
          sphere: noop$1,
          point: noop$1,
          lineStart: lengthLineStart,
          lineEnd: noop$1,
          polygonStart: noop$1,
          polygonEnd: noop$1
        };

        function lengthLineStart() {
          lengthStream$1.point = lengthPointFirst$1;
          lengthStream$1.lineEnd = lengthLineEnd;
        }

        function lengthLineEnd() {
          lengthStream$1.point = lengthStream$1.lineEnd = noop$1;
        }

        function lengthPointFirst$1(lambda, phi) {
          lambda *= radians, phi *= radians;
          lambda0 = lambda, sinPhi0 = sin(phi), cosPhi0 = cos(phi);
          lengthStream$1.point = lengthPoint$1;
        }

        function lengthPoint$1(lambda, phi) {
          lambda *= radians, phi *= radians;
          var sinPhi = sin(phi),
              cosPhi = cos(phi),
              delta = abs$2(lambda - lambda0),
              cosDelta = cos(delta),
              sinDelta = sin(delta),
              x = cosPhi * sinDelta,
              y = cosPhi0 * sinPhi - sinPhi0 * cosPhi * cosDelta,
              z = sinPhi0 * sinPhi + cosPhi0 * cosPhi * cosDelta;
          lengthSum$1.add(atan2(sqrt(x * x + y * y), z));
          lambda0 = lambda, sinPhi0 = sinPhi, cosPhi0 = cosPhi;
        }

        function d3_geoLength (object) {
          lengthSum$1 = new Adder();
          d3_geoStream(object, lengthStream$1);
          return +lengthSum$1;
        }

        var identity$4 = (function (x) {
          return x;
        });

        var areaSum = new Adder(),
            areaRingSum = new Adder(),
            x00$2,
            y00$2,
            x0$3,
            y0$3;
        var areaStream = {
          point: noop$1,
          lineStart: noop$1,
          lineEnd: noop$1,
          polygonStart: function polygonStart() {
            areaStream.lineStart = areaRingStart;
            areaStream.lineEnd = areaRingEnd;
          },
          polygonEnd: function polygonEnd() {
            areaStream.lineStart = areaStream.lineEnd = areaStream.point = noop$1;
            areaSum.add(abs$2(areaRingSum));
            areaRingSum = new Adder();
          },
          result: function result() {
            var area = areaSum / 2;
            areaSum = new Adder();
            return area;
          }
        };

        function areaRingStart() {
          areaStream.point = areaPointFirst;
        }

        function areaPointFirst(x, y) {
          areaStream.point = areaPoint;
          x00$2 = x0$3 = x, y00$2 = y0$3 = y;
        }

        function areaPoint(x, y) {
          areaRingSum.add(y0$3 * x - x0$3 * y);
          x0$3 = x, y0$3 = y;
        }

        function areaRingEnd() {
          areaPoint(x00$2, y00$2);
        }

        var x0$2 = Infinity,
            y0$2 = x0$2,
            x1 = -x0$2,
            y1 = x1;
        var boundsStream = {
          point: boundsPoint,
          lineStart: noop$1,
          lineEnd: noop$1,
          polygonStart: noop$1,
          polygonEnd: noop$1,
          result: function result() {
            var bounds = [[x0$2, y0$2], [x1, y1]];
            x1 = y1 = -(y0$2 = x0$2 = Infinity);
            return bounds;
          }
        };

        function boundsPoint(x, y) {
          if (x < x0$2) x0$2 = x;
          if (x > x1) x1 = x;
          if (y < y0$2) y0$2 = y;
          if (y > y1) y1 = y;
        }

        var X0 = 0,
            Y0 = 0,
            Z0 = 0,
            X1 = 0,
            Y1 = 0,
            Z1 = 0,
            X2 = 0,
            Y2 = 0,
            Z2 = 0,
            x00$1,
            y00$1,
            x0$1,
            y0$1;
        var centroidStream = {
          point: centroidPoint,
          lineStart: centroidLineStart,
          lineEnd: centroidLineEnd,
          polygonStart: function polygonStart() {
            centroidStream.lineStart = centroidRingStart;
            centroidStream.lineEnd = centroidRingEnd;
          },
          polygonEnd: function polygonEnd() {
            centroidStream.point = centroidPoint;
            centroidStream.lineStart = centroidLineStart;
            centroidStream.lineEnd = centroidLineEnd;
          },
          result: function result() {
            var centroid = Z2 ? [X2 / Z2, Y2 / Z2] : Z1 ? [X1 / Z1, Y1 / Z1] : Z0 ? [X0 / Z0, Y0 / Z0] : [NaN, NaN];
            X0 = Y0 = Z0 = X1 = Y1 = Z1 = X2 = Y2 = Z2 = 0;
            return centroid;
          }
        };

        function centroidPoint(x, y) {
          X0 += x;
          Y0 += y;
          ++Z0;
        }

        function centroidLineStart() {
          centroidStream.point = centroidPointFirstLine;
        }

        function centroidPointFirstLine(x, y) {
          centroidStream.point = centroidPointLine;
          centroidPoint(x0$1 = x, y0$1 = y);
        }

        function centroidPointLine(x, y) {
          var dx = x - x0$1,
              dy = y - y0$1,
              z = sqrt(dx * dx + dy * dy);
          X1 += z * (x0$1 + x) / 2;
          Y1 += z * (y0$1 + y) / 2;
          Z1 += z;
          centroidPoint(x0$1 = x, y0$1 = y);
        }

        function centroidLineEnd() {
          centroidStream.point = centroidPoint;
        }

        function centroidRingStart() {
          centroidStream.point = centroidPointFirstRing;
        }

        function centroidRingEnd() {
          centroidPointRing(x00$1, y00$1);
        }

        function centroidPointFirstRing(x, y) {
          centroidStream.point = centroidPointRing;
          centroidPoint(x00$1 = x0$1 = x, y00$1 = y0$1 = y);
        }

        function centroidPointRing(x, y) {
          var dx = x - x0$1,
              dy = y - y0$1,
              z = sqrt(dx * dx + dy * dy);
          X1 += z * (x0$1 + x) / 2;
          Y1 += z * (y0$1 + y) / 2;
          Z1 += z;
          z = y0$1 * x - x0$1 * y;
          X2 += z * (x0$1 + x);
          Y2 += z * (y0$1 + y);
          Z2 += z * 3;
          centroidPoint(x0$1 = x, y0$1 = y);
        }

        function PathContext(context) {
          this._context = context;
        }
        PathContext.prototype = {
          _radius: 4.5,
          pointRadius: function pointRadius(_) {
            return this._radius = _, this;
          },
          polygonStart: function polygonStart() {
            this._line = 0;
          },
          polygonEnd: function polygonEnd() {
            this._line = NaN;
          },
          lineStart: function lineStart() {
            this._point = 0;
          },
          lineEnd: function lineEnd() {
            if (this._line === 0) this._context.closePath();
            this._point = NaN;
          },
          point: function point(x, y) {
            switch (this._point) {
              case 0:
                {
                  this._context.moveTo(x, y);

                  this._point = 1;
                  break;
                }

              case 1:
                {
                  this._context.lineTo(x, y);

                  break;
                }

              default:
                {
                  this._context.moveTo(x + this._radius, y);

                  this._context.arc(x, y, this._radius, 0, tau);

                  break;
                }
            }
          },
          result: noop$1
        };

        var lengthSum = new Adder(),
            lengthRing,
            x00,
            y00,
            x0,
            y0;
        var lengthStream = {
          point: noop$1,
          lineStart: function lineStart() {
            lengthStream.point = lengthPointFirst;
          },
          lineEnd: function lineEnd() {
            if (lengthRing) lengthPoint(x00, y00);
            lengthStream.point = noop$1;
          },
          polygonStart: function polygonStart() {
            lengthRing = true;
          },
          polygonEnd: function polygonEnd() {
            lengthRing = null;
          },
          result: function result() {
            var length = +lengthSum;
            lengthSum = new Adder();
            return length;
          }
        };

        function lengthPointFirst(x, y) {
          lengthStream.point = lengthPoint;
          x00 = x0 = x, y00 = y0 = y;
        }

        function lengthPoint(x, y) {
          x0 -= x, y0 -= y;
          lengthSum.add(sqrt(x0 * x0 + y0 * y0));
          x0 = x, y0 = y;
        }

        function PathString() {
          this._string = [];
        }
        PathString.prototype = {
          _radius: 4.5,
          _circle: circle(4.5),
          pointRadius: function pointRadius(_) {
            if ((_ = +_) !== this._radius) this._radius = _, this._circle = null;
            return this;
          },
          polygonStart: function polygonStart() {
            this._line = 0;
          },
          polygonEnd: function polygonEnd() {
            this._line = NaN;
          },
          lineStart: function lineStart() {
            this._point = 0;
          },
          lineEnd: function lineEnd() {
            if (this._line === 0) this._string.push("Z");
            this._point = NaN;
          },
          point: function point(x, y) {
            switch (this._point) {
              case 0:
                {
                  this._string.push("M", x, ",", y);

                  this._point = 1;
                  break;
                }

              case 1:
                {
                  this._string.push("L", x, ",", y);

                  break;
                }

              default:
                {
                  if (this._circle == null) this._circle = circle(this._radius);

                  this._string.push("M", x, ",", y, this._circle);

                  break;
                }
            }
          },
          result: function result() {
            if (this._string.length) {
              var result = this._string.join("");

              this._string = [];
              return result;
            } else {
              return null;
            }
          }
        };

        function circle(radius) {
          return "m0," + radius + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius + "z";
        }

        function d3_geoPath (projection, context) {
          var pointRadius = 4.5,
              projectionStream,
              contextStream;

          function path(object) {
            if (object) {
              if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
              d3_geoStream(object, projectionStream(contextStream));
            }

            return contextStream.result();
          }

          path.area = function (object) {
            d3_geoStream(object, projectionStream(areaStream));
            return areaStream.result();
          };

          path.measure = function (object) {
            d3_geoStream(object, projectionStream(lengthStream));
            return lengthStream.result();
          };

          path.bounds = function (object) {
            d3_geoStream(object, projectionStream(boundsStream));
            return boundsStream.result();
          };

          path.centroid = function (object) {
            d3_geoStream(object, projectionStream(centroidStream));
            return centroidStream.result();
          };

          path.projection = function (_) {
            return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$4) : (projection = _).stream, path) : projection;
          };

          path.context = function (_) {
            if (!arguments.length) return context;
            contextStream = _ == null ? (context = null, new PathString()) : new PathContext(context = _);
            if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
            return path;
          };

          path.pointRadius = function (_) {
            if (!arguments.length) return pointRadius;
            pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
            return path;
          };

          return path.projection(projection).context(context);
        }

        function d3_geoTransform (methods) {
          return {
            stream: transformer$1(methods)
          };
        }
        function transformer$1(methods) {
          return function (stream) {
            var s = new TransformStream();

            for (var key in methods) {
              s[key] = methods[key];
            }

            s.stream = stream;
            return s;
          };
        }

        function TransformStream() {}

        TransformStream.prototype = {
          constructor: TransformStream,
          point: function point(x, y) {
            this.stream.point(x, y);
          },
          sphere: function sphere() {
            this.stream.sphere();
          },
          lineStart: function lineStart() {
            this.stream.lineStart();
          },
          lineEnd: function lineEnd() {
            this.stream.lineEnd();
          },
          polygonStart: function polygonStart() {
            this.stream.polygonStart();
          },
          polygonEnd: function polygonEnd() {
            this.stream.polygonEnd();
          }
        };

        function fit(projection, fitBounds, object) {
          var clip = projection.clipExtent && projection.clipExtent();
          projection.scale(150).translate([0, 0]);
          if (clip != null) projection.clipExtent(null);
          d3_geoStream(object, projection.stream(boundsStream));
          fitBounds(boundsStream.result());
          if (clip != null) projection.clipExtent(clip);
          return projection;
        }

        function fitExtent(projection, extent, object) {
          return fit(projection, function (b) {
            var w = extent[1][0] - extent[0][0],
                h = extent[1][1] - extent[0][1],
                k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
                x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
                y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
            projection.scale(150 * k).translate([x, y]);
          }, object);
        }
        function fitSize(projection, size, object) {
          return fitExtent(projection, [[0, 0], size], object);
        }
        function fitWidth(projection, width, object) {
          return fit(projection, function (b) {
            var w = +width,
                k = w / (b[1][0] - b[0][0]),
                x = (w - k * (b[1][0] + b[0][0])) / 2,
                y = -k * b[0][1];
            projection.scale(150 * k).translate([x, y]);
          }, object);
        }
        function fitHeight(projection, height, object) {
          return fit(projection, function (b) {
            var h = +height,
                k = h / (b[1][1] - b[0][1]),
                x = -k * b[0][0],
                y = (h - k * (b[1][1] + b[0][1])) / 2;
            projection.scale(150 * k).translate([x, y]);
          }, object);
        }

        var maxDepth = 16,
            // maximum depth of subdivision
        cosMinDistance = cos(30 * radians); // cos(minimum angular distance)

        function resample (project, delta2) {
          return +delta2 ? resample$1(project, delta2) : resampleNone(project);
        }

        function resampleNone(project) {
          return transformer$1({
            point: function point(x, y) {
              x = project(x, y);
              this.stream.point(x[0], x[1]);
            }
          });
        }

        function resample$1(project, delta2) {
          function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
            var dx = x1 - x0,
                dy = y1 - y0,
                d2 = dx * dx + dy * dy;

            if (d2 > 4 * delta2 && depth--) {
              var a = a0 + a1,
                  b = b0 + b1,
                  c = c0 + c1,
                  m = sqrt(a * a + b * b + c * c),
                  phi2 = asin(c /= m),
                  lambda2 = abs$2(abs$2(c) - 1) < epsilon$1 || abs$2(lambda0 - lambda1) < epsilon$1 ? (lambda0 + lambda1) / 2 : atan2(b, a),
                  p = project(lambda2, phi2),
                  x2 = p[0],
                  y2 = p[1],
                  dx2 = x2 - x0,
                  dy2 = y2 - y0,
                  dz = dy * dx2 - dx * dy2;

              if (dz * dz / d2 > delta2 // perpendicular projected distance
              || abs$2((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
              || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) {
                // angular distance
                resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
                stream.point(x2, y2);
                resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
              }
            }
          }

          return function (stream) {
            var lambda00, x00, y00, a00, b00, c00, // first point
            lambda0, x0, y0, a0, b0, c0; // previous point

            var resampleStream = {
              point: point,
              lineStart: lineStart,
              lineEnd: lineEnd,
              polygonStart: function polygonStart() {
                stream.polygonStart();
                resampleStream.lineStart = ringStart;
              },
              polygonEnd: function polygonEnd() {
                stream.polygonEnd();
                resampleStream.lineStart = lineStart;
              }
            };

            function point(x, y) {
              x = project(x, y);
              stream.point(x[0], x[1]);
            }

            function lineStart() {
              x0 = NaN;
              resampleStream.point = linePoint;
              stream.lineStart();
            }

            function linePoint(lambda, phi) {
              var c = cartesian([lambda, phi]),
                  p = project(lambda, phi);
              resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
              stream.point(x0, y0);
            }

            function lineEnd() {
              resampleStream.point = point;
              stream.lineEnd();
            }

            function ringStart() {
              lineStart();
              resampleStream.point = ringPoint;
              resampleStream.lineEnd = ringEnd;
            }

            function ringPoint(lambda, phi) {
              linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
              resampleStream.point = linePoint;
            }

            function ringEnd() {
              resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
              resampleStream.lineEnd = lineEnd;
              lineEnd();
            }

            return resampleStream;
          };
        }

        var transformRadians = transformer$1({
          point: function point(x, y) {
            this.stream.point(x * radians, y * radians);
          }
        });

        function transformRotate(rotate) {
          return transformer$1({
            point: function point(x, y) {
              var r = rotate(x, y);
              return this.stream.point(r[0], r[1]);
            }
          });
        }

        function scaleTranslate(k, dx, dy, sx, sy) {
          function transform(x, y) {
            x *= sx;
            y *= sy;
            return [dx + k * x, dy - k * y];
          }

          transform.invert = function (x, y) {
            return [(x - dx) / k * sx, (dy - y) / k * sy];
          };

          return transform;
        }

        function scaleTranslateRotate(k, dx, dy, sx, sy, alpha) {
          if (!alpha) return scaleTranslate(k, dx, dy, sx, sy);
          var cosAlpha = cos(alpha),
              sinAlpha = sin(alpha),
              a = cosAlpha * k,
              b = sinAlpha * k,
              ai = cosAlpha / k,
              bi = sinAlpha / k,
              ci = (sinAlpha * dy - cosAlpha * dx) / k,
              fi = (sinAlpha * dx + cosAlpha * dy) / k;

          function transform(x, y) {
            x *= sx;
            y *= sy;
            return [a * x - b * y + dx, dy - b * x - a * y];
          }

          transform.invert = function (x, y) {
            return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];
          };

          return transform;
        }

        function projection(project) {
          return projectionMutator(function () {
            return project;
          })();
        }
        function projectionMutator(projectAt) {
          var project,
              k = 150,
              // scale
          x = 480,
              y = 250,
              // translate
          lambda = 0,
              phi = 0,
              // center
          deltaLambda = 0,
              deltaPhi = 0,
              deltaGamma = 0,
              rotate,
              // pre-rotate
          alpha = 0,
              // post-rotate angle
          sx = 1,
              // reflectX
          sy = 1,
              // reflectX
          theta = null,
              preclip = clipAntimeridian,
              // pre-clip angle
          x0 = null,
              y0,
              x1,
              y1,
              postclip = identity$4,
              // post-clip extent
          delta2 = 0.5,
              // precision
          projectResample,
              projectTransform,
              projectRotateTransform,
              cache,
              cacheStream;

          function projection(point) {
            return projectRotateTransform(point[0] * radians, point[1] * radians);
          }

          function invert(point) {
            point = projectRotateTransform.invert(point[0], point[1]);
            return point && [point[0] * degrees$1, point[1] * degrees$1];
          }

          projection.stream = function (stream) {
            return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
          };

          projection.preclip = function (_) {
            return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
          };

          projection.postclip = function (_) {
            return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
          };

          projection.clipAngle = function (_) {
            return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;
          };

          projection.clipExtent = function (_) {
            return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
          };

          projection.scale = function (_) {
            return arguments.length ? (k = +_, recenter()) : k;
          };

          projection.translate = function (_) {
            return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
          };

          projection.center = function (_) {
            return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];
          };

          projection.rotate = function (_) {
            return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1];
          };

          projection.angle = function (_) {
            return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees$1;
          };

          projection.reflectX = function (_) {
            return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
          };

          projection.reflectY = function (_) {
            return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
          };

          projection.precision = function (_) {
            return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
          };

          projection.fitExtent = function (extent, object) {
            return fitExtent(projection, extent, object);
          };

          projection.fitSize = function (size, object) {
            return fitSize(projection, size, object);
          };

          projection.fitWidth = function (width, object) {
            return fitWidth(projection, width, object);
          };

          projection.fitHeight = function (height, object) {
            return fitHeight(projection, height, object);
          };

          function recenter() {
            var center = scaleTranslateRotate(k, 0, 0, sx, sy, alpha).apply(null, project(lambda, phi)),
                transform = scaleTranslateRotate(k, x - center[0], y - center[1], sx, sy, alpha);
            rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
            projectTransform = compose(project, transform);
            projectRotateTransform = compose(rotate, projectTransform);
            projectResample = resample(projectTransform, delta2);
            return reset();
          }

          function reset() {
            cache = cacheStream = null;
            return projection;
          }

          return function () {
            project = projectAt.apply(this, arguments);
            projection.invert = project.invert && invert;
            return recenter();
          };
        }

        function mercatorRaw(lambda, phi) {
          return [lambda, log$1(tan((halfPi + phi) / 2))];
        }

        mercatorRaw.invert = function (x, y) {
          return [x, 2 * atan(exp$2(y)) - halfPi];
        };

        function mercator () {
          return mercatorProjection(mercatorRaw).scale(961 / tau);
        }
        function mercatorProjection(project) {
          var m = projection(project),
              center = m.center,
              scale = m.scale,
              translate = m.translate,
              clipExtent = m.clipExtent,
              x0 = null,
              y0,
              x1,
              y1; // clip extent

          m.scale = function (_) {
            return arguments.length ? (scale(_), reclip()) : scale();
          };

          m.translate = function (_) {
            return arguments.length ? (translate(_), reclip()) : translate();
          };

          m.center = function (_) {
            return arguments.length ? (center(_), reclip()) : center();
          };

          m.clipExtent = function (_) {
            return arguments.length ? (_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
          };

          function reclip() {
            var k = pi * scale(),
                t = m(rotation(m.rotate()).invert([0, 0]));
            return clipExtent(x0 == null ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]] : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);
          }

          return reclip();
        }

        function d3_geoIdentity () {
          var k = 1,
              tx = 0,
              ty = 0,
              sx = 1,
              sy = 1,
              // scale, translate and reflect
          alpha = 0,
              ca,
              sa,
              // angle
          x0 = null,
              y0,
              x1,
              y1,
              // clip extent
          kx = 1,
              ky = 1,
              transform = transformer$1({
            point: function point(x, y) {
              var p = projection([x, y]);
              this.stream.point(p[0], p[1]);
            }
          }),
              postclip = identity$4,
              cache,
              cacheStream;

          function reset() {
            kx = k * sx;
            ky = k * sy;
            cache = cacheStream = null;
            return projection;
          }

          function projection(p) {
            var x = p[0] * kx,
                y = p[1] * ky;

            if (alpha) {
              var t = y * ca - x * sa;
              x = x * ca + y * sa;
              y = t;
            }

            return [x + tx, y + ty];
          }

          projection.invert = function (p) {
            var x = p[0] - tx,
                y = p[1] - ty;

            if (alpha) {
              var t = y * ca + x * sa;
              x = x * ca - y * sa;
              y = t;
            }

            return [x / kx, y / ky];
          };

          projection.stream = function (stream) {
            return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
          };

          projection.postclip = function (_) {
            return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
          };

          projection.clipExtent = function (_) {
            return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
          };

          projection.scale = function (_) {
            return arguments.length ? (k = +_, reset()) : k;
          };

          projection.translate = function (_) {
            return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];
          };

          projection.angle = function (_) {
            return arguments.length ? (alpha = _ % 360 * radians, sa = sin(alpha), ca = cos(alpha), reset()) : alpha * degrees$1;
          };

          projection.reflectX = function (_) {
            return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;
          };

          projection.reflectY = function (_) {
            return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
          };

          projection.fitExtent = function (extent, object) {
            return fitExtent(projection, extent, object);
          };

          projection.fitSize = function (size, object) {
            return fitSize(projection, size, object);
          };

          projection.fitWidth = function (width, object) {
            return fitWidth(projection, width, object);
          };

          projection.fitHeight = function (height, object) {
            return fitHeight(projection, height, object);
          };

          return projection;
        }

        // constants
        var TAU = 2 * Math.PI;
        var EQUATORIAL_RADIUS = 6356752.314245179;
        var POLAR_RADIUS$1 = 6378137.0;
        function geoLatToMeters(dLat) {
          return dLat * (TAU * POLAR_RADIUS$1 / 360);
        }
        function geoLonToMeters(dLon, atLat) {
          return Math.abs(atLat) >= 90 ? 0 : dLon * (TAU * EQUATORIAL_RADIUS / 360) * Math.abs(Math.cos(atLat * (Math.PI / 180)));
        }
        function geoMetersToLat(m) {
          return m / (TAU * POLAR_RADIUS$1 / 360);
        }
        function geoMetersToLon(m, atLat) {
          return Math.abs(atLat) >= 90 ? 0 : m / (TAU * EQUATORIAL_RADIUS / 360) / Math.abs(Math.cos(atLat * (Math.PI / 180)));
        }
        function geoMetersToOffset(meters, tileSize) {
          tileSize = tileSize || 256;
          return [meters[0] * tileSize / (TAU * EQUATORIAL_RADIUS), -meters[1] * tileSize / (TAU * POLAR_RADIUS$1)];
        }
        function geoOffsetToMeters(offset, tileSize) {
          tileSize = tileSize || 256;
          return [offset[0] * TAU * EQUATORIAL_RADIUS / tileSize, -offset[1] * TAU * POLAR_RADIUS$1 / tileSize];
        } // Equirectangular approximation of spherical distances on Earth

        function geoSphericalDistance(a, b) {
          var x = geoLonToMeters(a[0] - b[0], (a[1] + b[1]) / 2);
          var y = geoLatToMeters(a[1] - b[1]);
          return Math.sqrt(x * x + y * y);
        } // scale to zoom

        function geoScaleToZoom(k, tileSize) {
          tileSize = tileSize || 256;
          var log2ts = Math.log(tileSize) * Math.LOG2E;
          return Math.log(k * TAU) / Math.LN2 - log2ts;
        } // zoom to scale

        function geoZoomToScale(z, tileSize) {
          tileSize = tileSize || 256;
          return tileSize * Math.pow(2, z) / TAU;
        } // returns info about the node from `nodes` closest to the given `point`

        function geoSphericalClosestNode(nodes, point) {
          var minDistance = Infinity,
              distance;
          var indexOfMin;

          for (var i in nodes) {
            distance = geoSphericalDistance(nodes[i].loc, point);

            if (distance < minDistance) {
              minDistance = distance;
              indexOfMin = i;
            }
          }

          if (indexOfMin !== undefined) {
            return {
              index: indexOfMin,
              distance: minDistance,
              node: nodes[indexOfMin]
            };
          } else {
            return null;
          }
        }

        function geoExtent(min, max) {
          if (!(this instanceof geoExtent)) {
            return new geoExtent(min, max);
          } else if (min instanceof geoExtent) {
            return min;
          } else if (min && min.length === 2 && min[0].length === 2 && min[1].length === 2) {
            this[0] = min[0];
            this[1] = min[1];
          } else {
            this[0] = min || [Infinity, Infinity];
            this[1] = max || min || [-Infinity, -Infinity];
          }
        }
        geoExtent.prototype = new Array(2);
        Object.assign(geoExtent.prototype, {
          equals: function equals(obj) {
            return this[0][0] === obj[0][0] && this[0][1] === obj[0][1] && this[1][0] === obj[1][0] && this[1][1] === obj[1][1];
          },
          extend: function extend(obj) {
            if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
            return geoExtent([Math.min(obj[0][0], this[0][0]), Math.min(obj[0][1], this[0][1])], [Math.max(obj[1][0], this[1][0]), Math.max(obj[1][1], this[1][1])]);
          },
          _extend: function _extend(extent) {
            this[0][0] = Math.min(extent[0][0], this[0][0]);
            this[0][1] = Math.min(extent[0][1], this[0][1]);
            this[1][0] = Math.max(extent[1][0], this[1][0]);
            this[1][1] = Math.max(extent[1][1], this[1][1]);
          },
          area: function area() {
            return Math.abs((this[1][0] - this[0][0]) * (this[1][1] - this[0][1]));
          },
          center: function center() {
            return [(this[0][0] + this[1][0]) / 2, (this[0][1] + this[1][1]) / 2];
          },
          rectangle: function rectangle() {
            return [this[0][0], this[0][1], this[1][0], this[1][1]];
          },
          bbox: function bbox() {
            return {
              minX: this[0][0],
              minY: this[0][1],
              maxX: this[1][0],
              maxY: this[1][1]
            };
          },
          polygon: function polygon() {
            return [[this[0][0], this[0][1]], [this[0][0], this[1][1]], [this[1][0], this[1][1]], [this[1][0], this[0][1]], [this[0][0], this[0][1]]];
          },
          contains: function contains(obj) {
            if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
            return obj[0][0] >= this[0][0] && obj[0][1] >= this[0][1] && obj[1][0] <= this[1][0] && obj[1][1] <= this[1][1];
          },
          intersects: function intersects(obj) {
            if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
            return obj[0][0] <= this[1][0] && obj[0][1] <= this[1][1] && obj[1][0] >= this[0][0] && obj[1][1] >= this[0][1];
          },
          intersection: function intersection(obj) {
            if (!this.intersects(obj)) return new geoExtent();
            return new geoExtent([Math.max(obj[0][0], this[0][0]), Math.max(obj[0][1], this[0][1])], [Math.min(obj[1][0], this[1][0]), Math.min(obj[1][1], this[1][1])]);
          },
          percentContainedIn: function percentContainedIn(obj) {
            if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
            var a1 = this.intersection(obj).area();
            var a2 = this.area();

            if (a1 === Infinity || a2 === Infinity) {
              return 0;
            } else if (a1 === 0 || a2 === 0) {
              if (obj.contains(this)) {
                return 1;
              }

              return 0;
            } else {
              return a1 / a2;
            }
          },
          padByMeters: function padByMeters(meters) {
            var dLat = geoMetersToLat(meters);
            var dLon = geoMetersToLon(meters, this.center()[1]);
            return geoExtent([this[0][0] - dLon, this[0][1] - dLat], [this[1][0] + dLon, this[1][1] + dLat]);
          },
          toParam: function toParam() {
            return this.rectangle().join(',');
          }
        });

        var $every = arrayIteration.every;


        var STRICT_METHOD$1 = arrayMethodIsStrict('every');

        // `Array.prototype.every` method
        // https://tc39.es/ecma262/#sec-array.prototype.every
        _export({ target: 'Array', proto: true, forced: !STRICT_METHOD$1 }, {
          every: function every(callbackfn /* , thisArg */) {
            return $every(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          }
        });

        var $reduce = arrayReduce.left;




        var STRICT_METHOD = arrayMethodIsStrict('reduce');
        // Chrome 80-82 has a critical bug
        // https://bugs.chromium.org/p/chromium/issues/detail?id=1049982
        var CHROME_BUG = !engineIsNode && engineV8Version > 79 && engineV8Version < 83;

        // `Array.prototype.reduce` method
        // https://tc39.es/ecma262/#sec-array.prototype.reduce
        _export({ target: 'Array', proto: true, forced: !STRICT_METHOD || CHROME_BUG }, {
          reduce: function reduce(callbackfn /* , initialValue */) {
            return $reduce(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
          }
        });

        function d3_polygonArea (polygon) {
          var i = -1,
              n = polygon.length,
              a,
              b = polygon[n - 1],
              area = 0;

          while (++i < n) {
            a = b;
            b = polygon[i];
            area += a[1] * b[0] - a[0] * b[1];
          }

          return area / 2;
        }

        function d3_polygonCentroid (polygon) {
          var i = -1,
              n = polygon.length,
              x = 0,
              y = 0,
              a,
              b = polygon[n - 1],
              c,
              k = 0;

          while (++i < n) {
            a = b;
            b = polygon[i];
            k += c = a[0] * b[1] - b[0] * a[1];
            x += (a[0] + b[0]) * c;
            y += (a[1] + b[1]) * c;
          }

          return k *= 3, [x / k, y / k];
        }

        // Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
        // the 3D cross product in a quadrant I Cartesian coordinate system (+x is
        // right, +y is up). Returns a positive value if ABC is counter-clockwise,
        // negative if clockwise, and zero if the points are collinear.
        function cross (a, b, c) {
          return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
        }

        function lexicographicOrder(a, b) {
          return a[0] - b[0] || a[1] - b[1];
        } // Computes the upper convex hull per the monotone chain algorithm.
        // Assumes points.length >= 3, is sorted by x, unique in y.
        // Returns an array of indices into points in left-to-right order.


        function computeUpperHullIndexes(points) {
          var n = points.length,
              indexes = [0, 1];
          var size = 2,
              i;

          for (i = 2; i < n; ++i) {
            while (size > 1 && cross(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) {
              --size;
            }

            indexes[size++] = i;
          }

          return indexes.slice(0, size); // remove popped points
        }

        function d3_polygonHull (points) {
          if ((n = points.length) < 3) return null;
          var i,
              n,
              sortedPoints = new Array(n),
              flippedPoints = new Array(n);

          for (i = 0; i < n; ++i) {
            sortedPoints[i] = [+points[i][0], +points[i][1], i];
          }

          sortedPoints.sort(lexicographicOrder);

          for (i = 0; i < n; ++i) {
            flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];
          }

          var upperIndexes = computeUpperHullIndexes(sortedPoints),
              lowerIndexes = computeUpperHullIndexes(flippedPoints); // Construct the hull polygon, removing possible duplicate endpoints.

          var skipLeft = lowerIndexes[0] === upperIndexes[0],
              skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
              hull = []; // Add upper hull in right-to-l order.
          // Then add lower hull in left-to-right order.

          for (i = upperIndexes.length - 1; i >= 0; --i) {
            hull.push(points[sortedPoints[upperIndexes[i]][2]]);
          }

          for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) {
            hull.push(points[sortedPoints[lowerIndexes[i]][2]]);
          }

          return hull;
        }

        // vector equals
        function geoVecEqual(a, b, epsilon) {
          if (epsilon) {
            return Math.abs(a[0] - b[0]) <= epsilon && Math.abs(a[1] - b[1]) <= epsilon;
          } else {
            return a[0] === b[0] && a[1] === b[1];
          }
        } // vector addition

        function geoVecAdd(a, b) {
          return [a[0] + b[0], a[1] + b[1]];
        } // vector subtraction

        function geoVecSubtract(a, b) {
          return [a[0] - b[0], a[1] - b[1]];
        } // vector scaling

        function geoVecScale(a, mag) {
          return [a[0] * mag, a[1] * mag];
        } // vector rounding (was: geoRoundCoordinates)

        function geoVecFloor(a) {
          return [Math.floor(a[0]), Math.floor(a[1])];
        } // linear interpolation

        function geoVecInterp(a, b, t) {
          return [a[0] + (b[0] - a[0]) * t, a[1] + (b[1] - a[1]) * t];
        } // http://jsperf.com/id-dist-optimization

        function geoVecLength(a, b) {
          return Math.sqrt(geoVecLengthSquare(a, b));
        } // length of vector raised to the power two

        function geoVecLengthSquare(a, b) {
          b = b || [0, 0];
          var x = a[0] - b[0];
          var y = a[1] - b[1];
          return x * x + y * y;
        } // get a unit vector

        function geoVecNormalize(a) {
          var length = Math.sqrt(a[0] * a[0] + a[1] * a[1]);

          if (length !== 0) {
            return geoVecScale(a, 1 / length);
          }

          return [0, 0];
        } // Return the counterclockwise angle in the range (-pi, pi)
        // between the positive X axis and the line intersecting a and b.

        function geoVecAngle(a, b) {
          return Math.atan2(b[1] - a[1], b[0] - a[0]);
        } // dot product

        function geoVecDot(a, b, origin) {
          origin = origin || [0, 0];
          var p = geoVecSubtract(a, origin);
          var q = geoVecSubtract(b, origin);
          return p[0] * q[0] + p[1] * q[1];
        } // normalized dot product

        function geoVecNormalizedDot(a, b, origin) {
          origin = origin || [0, 0];
          var p = geoVecNormalize(geoVecSubtract(a, origin));
          var q = geoVecNormalize(geoVecSubtract(b, origin));
          return geoVecDot(p, q);
        } // 2D cross product of OA and OB vectors, returns magnitude of Z vector
        // Returns a positive value, if OAB makes a counter-clockwise turn,
        // negative for clockwise turn, and zero if the points are collinear.

        function geoVecCross(a, b, origin) {
          origin = origin || [0, 0];
          var p = geoVecSubtract(a, origin);
          var q = geoVecSubtract(b, origin);
          return p[0] * q[1] - p[1] * q[0];
        } // find closest orthogonal projection of point onto points array

        function geoVecProject(a, points) {
          var min = Infinity;
          var idx;
          var target;

          for (var i = 0; i < points.length - 1; i++) {
            var o = points[i];
            var s = geoVecSubtract(points[i + 1], o);
            var v = geoVecSubtract(a, o);
            var proj = geoVecDot(v, s) / geoVecDot(s, s);
            var p;

            if (proj < 0) {
              p = o;
            } else if (proj > 1) {
              p = points[i + 1];
            } else {
              p = [o[0] + proj * s[0], o[1] + proj * s[1]];
            }

            var dist = geoVecLength(p, a);

            if (dist < min) {
              min = dist;
              idx = i + 1;
              target = p;
            }
          }

          if (idx !== undefined) {
            return {
              index: idx,
              distance: min,
              target: target
            };
          } else {
            return null;
          }
        }

        // between the positive X axis and the line intersecting a and b.

        function geoAngle(a, b, projection) {
          return geoVecAngle(projection(a.loc), projection(b.loc));
        }
        function geoEdgeEqual(a, b) {
          return a[0] === b[0] && a[1] === b[1] || a[0] === b[1] && a[1] === b[0];
        } // Rotate all points counterclockwise around a pivot point by given angle

        function geoRotate(points, angle, around) {
          return points.map(function (point) {
            var radial = geoVecSubtract(point, around);
            return [radial[0] * Math.cos(angle) - radial[1] * Math.sin(angle) + around[0], radial[0] * Math.sin(angle) + radial[1] * Math.cos(angle) + around[1]];
          });
        } // Choose the edge with the minimal distance from `point` to its orthogonal
        // projection onto that edge, if such a projection exists, or the distance to
        // the closest vertex on that edge. Returns an object with the `index` of the
        // chosen edge, the chosen `loc` on that edge, and the `distance` to to it.

        function geoChooseEdge(nodes, point, projection, activeID) {
          var dist = geoVecLength;
          var points = nodes.map(function (n) {
            return projection(n.loc);
          });
          var ids = nodes.map(function (n) {
            return n.id;
          });
          var min = Infinity;
          var idx;
          var loc;

          for (var i = 0; i < points.length - 1; i++) {
            if (ids[i] === activeID || ids[i + 1] === activeID) continue;
            var o = points[i];
            var s = geoVecSubtract(points[i + 1], o);
            var v = geoVecSubtract(point, o);
            var proj = geoVecDot(v, s) / geoVecDot(s, s);
            var p;

            if (proj < 0) {
              p = o;
            } else if (proj > 1) {
              p = points[i + 1];
            } else {
              p = [o[0] + proj * s[0], o[1] + proj * s[1]];
            }

            var d = dist(p, point);

            if (d < min) {
              min = d;
              idx = i + 1;
              loc = projection.invert(p);
            }
          }

          if (idx !== undefined) {
            return {
              index: idx,
              distance: min,
              loc: loc
            };
          } else {
            return null;
          }
        } // Test active (dragged or drawing) segments against inactive segments
        // This is used to test e.g. multipolygon rings that cross
        // `activeNodes` is the ring containing the activeID being dragged.
        // `inactiveNodes` is the other ring to test against

        function geoHasLineIntersections(activeNodes, inactiveNodes, activeID) {
          var actives = [];
          var inactives = [];
          var j, k, n1, n2, segment; // gather active segments (only segments in activeNodes that contain the activeID)

          for (j = 0; j < activeNodes.length - 1; j++) {
            n1 = activeNodes[j];
            n2 = activeNodes[j + 1];
            segment = [n1.loc, n2.loc];

            if (n1.id === activeID || n2.id === activeID) {
              actives.push(segment);
            }
          } // gather inactive segments


          for (j = 0; j < inactiveNodes.length - 1; j++) {
            n1 = inactiveNodes[j];
            n2 = inactiveNodes[j + 1];
            segment = [n1.loc, n2.loc];
            inactives.push(segment);
          } // test


          for (j = 0; j < actives.length; j++) {
            for (k = 0; k < inactives.length; k++) {
              var p = actives[j];
              var q = inactives[k];
              var hit = geoLineIntersection(p, q);

              if (hit) {
                return true;
              }
            }
          }

          return false;
        } // Test active (dragged or drawing) segments against inactive segments
        // This is used to test whether a way intersects with itself.

        function geoHasSelfIntersections(nodes, activeID) {
          var actives = [];
          var inactives = [];
          var j, k; // group active and passive segments along the nodes

          for (j = 0; j < nodes.length - 1; j++) {
            var n1 = nodes[j];
            var n2 = nodes[j + 1];
            var segment = [n1.loc, n2.loc];

            if (n1.id === activeID || n2.id === activeID) {
              actives.push(segment);
            } else {
              inactives.push(segment);
            }
          } // test


          for (j = 0; j < actives.length; j++) {
            for (k = 0; k < inactives.length; k++) {
              var p = actives[j];
              var q = inactives[k]; // skip if segments share an endpoint

              if (geoVecEqual(p[1], q[0]) || geoVecEqual(p[0], q[1]) || geoVecEqual(p[0], q[0]) || geoVecEqual(p[1], q[1])) {
                continue;
              }

              var hit = geoLineIntersection(p, q);

              if (hit) {
                var epsilon = 1e-8; // skip if the hit is at the segment's endpoint

                if (geoVecEqual(p[1], hit, epsilon) || geoVecEqual(p[0], hit, epsilon) || geoVecEqual(q[1], hit, epsilon) || geoVecEqual(q[0], hit, epsilon)) {
                  continue;
                } else {
                  return true;
                }
              }
            }
          }

          return false;
        } // Return the intersection point of 2 line segments.
        // From https://github.com/pgkelley4/line-segments-intersect
        // This uses the vector cross product approach described below:
        //  http://stackoverflow.com/a/565282/786339

        function geoLineIntersection(a, b) {
          var p = [a[0][0], a[0][1]];
          var p2 = [a[1][0], a[1][1]];
          var q = [b[0][0], b[0][1]];
          var q2 = [b[1][0], b[1][1]];
          var r = geoVecSubtract(p2, p);
          var s = geoVecSubtract(q2, q);
          var uNumerator = geoVecCross(geoVecSubtract(q, p), r);
          var denominator = geoVecCross(r, s);

          if (uNumerator && denominator) {
            var u = uNumerator / denominator;
            var t = geoVecCross(geoVecSubtract(q, p), s) / denominator;

            if (t >= 0 && t <= 1 && u >= 0 && u <= 1) {
              return geoVecInterp(p, p2, t);
            }
          }

          return null;
        }
        function geoPathIntersections(path1, path2) {
          var intersections = [];

          for (var i = 0; i < path1.length - 1; i++) {
            for (var j = 0; j < path2.length - 1; j++) {
              var a = [path1[i], path1[i + 1]];
              var b = [path2[j], path2[j + 1]];
              var hit = geoLineIntersection(a, b);

              if (hit) {
                intersections.push(hit);
              }
            }
          }

          return intersections;
        }
        function geoPathHasIntersections(path1, path2) {
          for (var i = 0; i < path1.length - 1; i++) {
            for (var j = 0; j < path2.length - 1; j++) {
              var a = [path1[i], path1[i + 1]];
              var b = [path2[j], path2[j + 1]];
              var hit = geoLineIntersection(a, b);

              if (hit) {
                return true;
              }
            }
          }

          return false;
        } // Return whether point is contained in polygon.
        //
        // `point` should be a 2-item array of coordinates.
        // `polygon` should be an array of 2-item arrays of coordinates.
        //
        // From https://github.com/substack/point-in-polygon.
        // ray-casting algorithm based on
        // http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
        //

        function geoPointInPolygon(point, polygon) {
          var x = point[0];
          var y = point[1];
          var inside = false;

          for (var i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
            var xi = polygon[i][0];
            var yi = polygon[i][1];
            var xj = polygon[j][0];
            var yj = polygon[j][1];
            var intersect = yi > y !== yj > y && x < (xj - xi) * (y - yi) / (yj - yi) + xi;
            if (intersect) inside = !inside;
          }

          return inside;
        }
        function geoPolygonContainsPolygon(outer, inner) {
          return inner.every(function (point) {
            return geoPointInPolygon(point, outer);
          });
        }
        function geoPolygonIntersectsPolygon(outer, inner, checkSegments) {
          function testPoints(outer, inner) {
            return inner.some(function (point) {
              return geoPointInPolygon(point, outer);
            });
          }

          return testPoints(outer, inner) || !!checkSegments && geoPathHasIntersections(outer, inner);
        } // http://gis.stackexchange.com/questions/22895/finding-minimum-area-rectangle-for-given-points
        // http://gis.stackexchange.com/questions/3739/generalisation-strategies-for-building-outlines/3756#3756

        function geoGetSmallestSurroundingRectangle(points) {
          var hull = d3_polygonHull(points);
          var centroid = d3_polygonCentroid(hull);
          var minArea = Infinity;
          var ssrExtent = [];
          var ssrAngle = 0;
          var c1 = hull[0];

          for (var i = 0; i <= hull.length - 1; i++) {
            var c2 = i === hull.length - 1 ? hull[0] : hull[i + 1];
            var angle = Math.atan2(c2[1] - c1[1], c2[0] - c1[0]);
            var poly = geoRotate(hull, -angle, centroid);
            var extent = poly.reduce(function (extent, point) {
              return extent.extend(geoExtent(point));
            }, geoExtent());
            var area = extent.area();

            if (area < minArea) {
              minArea = area;
              ssrExtent = extent;
              ssrAngle = angle;
            }

            c1 = c2;
          }

          return {
            poly: geoRotate(ssrExtent.polygon(), ssrAngle, centroid),
            angle: ssrAngle
          };
        }
        function geoPathLength(path) {
          var length = 0;

          for (var i = 0; i < path.length - 1; i++) {
            length += geoVecLength(path[i], path[i + 1]);
          }

          return length;
        } // If the given point is at the edge of the padded viewport,
        // return a vector that will nudge the viewport in that direction

        function geoViewportEdge(point, dimensions) {
          var pad = [80, 20, 50, 20]; // top, right, bottom, left

          var x = 0;
          var y = 0;

          if (point[0] > dimensions[0] - pad[1]) {
            x = -10;
          }

          if (point[0] < pad[3]) {
            x = 10;
          }

          if (point[1] > dimensions[1] - pad[2]) {
            y = -10;
          }

          if (point[1] < pad[0]) {
            y = 10;
          }

          if (x || y) {
            return [x, y];
          } else {
            return null;
          }
        }

        var noop = {
          value: function value() {}
        };

        function dispatch$8() {
          for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
            if (!(t = arguments[i] + "") || t in _ || /[\s.]/.test(t)) throw new Error("illegal type: " + t);
            _[t] = [];
          }

          return new Dispatch(_);
        }

        function Dispatch(_) {
          this._ = _;
        }

        function parseTypenames$1(typenames, types) {
          return typenames.trim().split(/^|\s+/).map(function (t) {
            var name = "",
                i = t.indexOf(".");
            if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
            if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
            return {
              type: t,
              name: name
            };
          });
        }

        Dispatch.prototype = dispatch$8.prototype = {
          constructor: Dispatch,
          on: function on(typename, callback) {
            var _ = this._,
                T = parseTypenames$1(typename + "", _),
                t,
                i = -1,
                n = T.length; // If no callback was specified, return the callback of the given type and name.

            if (arguments.length < 2) {
              while (++i < n) {
                if ((t = (typename = T[i]).type) && (t = get$2(_[t], typename.name))) return t;
              }

              return;
            } // If a type was specified, set the callback for the given type and name.
            // Otherwise, if a null callback was specified, remove callbacks of the given name.


            if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);

            while (++i < n) {
              if (t = (typename = T[i]).type) _[t] = set$1(_[t], typename.name, callback);else if (callback == null) for (t in _) {
                _[t] = set$1(_[t], typename.name, null);
              }
            }

            return this;
          },
          copy: function copy() {
            var copy = {},
                _ = this._;

            for (var t in _) {
              copy[t] = _[t].slice();
            }

            return new Dispatch(copy);
          },
          call: function call(type, that) {
            if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) {
              args[i] = arguments[i + 2];
            }
            if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);

            for (t = this._[type], i = 0, n = t.length; i < n; ++i) {
              t[i].value.apply(that, args);
            }
          },
          apply: function apply(type, that, args) {
            if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);

            for (var t = this._[type], i = 0, n = t.length; i < n; ++i) {
              t[i].value.apply(that, args);
            }
          }
        };

        function get$2(type, name) {
          for (var i = 0, n = type.length, c; i < n; ++i) {
            if ((c = type[i]).name === name) {
              return c.value;
            }
          }
        }

        function set$1(type, name, callback) {
          for (var i = 0, n = type.length; i < n; ++i) {
            if (type[i].name === name) {
              type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
              break;
            }
          }

          if (callback != null) type.push({
            name: name,
            value: callback
          });
          return type;
        }

        var xhtml = "http://www.w3.org/1999/xhtml";
        var namespaces = {
          svg: "http://www.w3.org/2000/svg",
          xhtml: xhtml,
          xlink: "http://www.w3.org/1999/xlink",
          xml: "http://www.w3.org/XML/1998/namespace",
          xmlns: "http://www.w3.org/2000/xmlns/"
        };

        function namespace (name) {
          var prefix = name += "",
              i = prefix.indexOf(":");
          if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
          return namespaces.hasOwnProperty(prefix) ? {
            space: namespaces[prefix],
            local: name
          } : name; // eslint-disable-line no-prototype-builtins
        }

        function creatorInherit(name) {
          return function () {
            var document = this.ownerDocument,
                uri = this.namespaceURI;
            return uri === xhtml && document.documentElement.namespaceURI === xhtml ? document.createElement(name) : document.createElementNS(uri, name);
          };
        }

        function creatorFixed(fullname) {
          return function () {
            return this.ownerDocument.createElementNS(fullname.space, fullname.local);
          };
        }

        function creator (name) {
          var fullname = namespace(name);
          return (fullname.local ? creatorFixed : creatorInherit)(fullname);
        }

        function none() {}

        function selector (selector) {
          return selector == null ? none : function () {
            return this.querySelector(selector);
          };
        }

        function selection_select (select) {
          if (typeof select !== "function") select = selector(select);

          for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
            for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
              if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
                if ("__data__" in node) subnode.__data__ = node.__data__;
                subgroup[i] = subnode;
              }
            }
          }

          return new Selection$1(subgroups, this._parents);
        }

        function array (x) {
          return _typeof(x) === "object" && "length" in x ? x // Array, TypedArray, NodeList, array-like
          : Array.from(x); // Map, Set, iterable, string, or anything else
        }

        function empty() {
          return [];
        }

        function selectorAll (selector) {
          return selector == null ? empty : function () {
            return this.querySelectorAll(selector);
          };
        }

        function arrayAll(select) {
          return function () {
            var group = select.apply(this, arguments);
            return group == null ? [] : array(group);
          };
        }

        function selection_selectAll (select) {
          if (typeof select === "function") select = arrayAll(select);else select = selectorAll(select);

          for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
            for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
              if (node = group[i]) {
                subgroups.push(select.call(node, node.__data__, i, group));
                parents.push(node);
              }
            }
          }

          return new Selection$1(subgroups, parents);
        }

        var $find = arrayIteration.find;


        var FIND = 'find';
        var SKIPS_HOLES$1 = true;

        // Shouldn't skip holes
        if (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES$1 = false; });

        // `Array.prototype.find` method
        // https://tc39.es/ecma262/#sec-array.prototype.find
        _export({ target: 'Array', proto: true, forced: SKIPS_HOLES$1 }, {
          find: function find(callbackfn /* , that = undefined */) {
            return $find(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          }
        });

        // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
        addToUnscopables(FIND);

        function matcher (selector) {
          return function () {
            return this.matches(selector);
          };
        }
        function childMatcher(selector) {
          return function (node) {
            return node.matches(selector);
          };
        }

        var find = Array.prototype.find;

        function childFind(match) {
          return function () {
            return find.call(this.children, match);
          };
        }

        function childFirst() {
          return this.firstElementChild;
        }

        function selection_selectChild (match) {
          return this.select(match == null ? childFirst : childFind(typeof match === "function" ? match : childMatcher(match)));
        }

        var filter = Array.prototype.filter;

        function children() {
          return this.children;
        }

        function childrenFilter(match) {
          return function () {
            return filter.call(this.children, match);
          };
        }

        function selection_selectChildren (match) {
          return this.selectAll(match == null ? children : childrenFilter(typeof match === "function" ? match : childMatcher(match)));
        }

        function selection_filter (match) {
          if (typeof match !== "function") match = matcher(match);

          for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
            for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
              if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
                subgroup.push(node);
              }
            }
          }

          return new Selection$1(subgroups, this._parents);
        }

        function sparse (update) {
          return new Array(update.length);
        }

        function selection_enter () {
          return new Selection$1(this._enter || this._groups.map(sparse), this._parents);
        }
        function EnterNode(parent, datum) {
          this.ownerDocument = parent.ownerDocument;
          this.namespaceURI = parent.namespaceURI;
          this._next = null;
          this._parent = parent;
          this.__data__ = datum;
        }
        EnterNode.prototype = {
          constructor: EnterNode,
          appendChild: function appendChild(child) {
            return this._parent.insertBefore(child, this._next);
          },
          insertBefore: function insertBefore(child, next) {
            return this._parent.insertBefore(child, next);
          },
          querySelector: function querySelector(selector) {
            return this._parent.querySelector(selector);
          },
          querySelectorAll: function querySelectorAll(selector) {
            return this._parent.querySelectorAll(selector);
          }
        };

        function constant$3 (x) {
          return function () {
            return x;
          };
        }

        function bindIndex(parent, group, enter, update, exit, data) {
          var i = 0,
              node,
              groupLength = group.length,
              dataLength = data.length; // Put any non-null nodes that fit into update.
          // Put any null nodes into enter.
          // Put any remaining data into enter.

          for (; i < dataLength; ++i) {
            if (node = group[i]) {
              node.__data__ = data[i];
              update[i] = node;
            } else {
              enter[i] = new EnterNode(parent, data[i]);
            }
          } // Put any non-null nodes that don’t fit into exit.


          for (; i < groupLength; ++i) {
            if (node = group[i]) {
              exit[i] = node;
            }
          }
        }

        function bindKey(parent, group, enter, update, exit, data, key) {
          var i,
              node,
              nodeByKeyValue = new Map(),
              groupLength = group.length,
              dataLength = data.length,
              keyValues = new Array(groupLength),
              keyValue; // Compute the key for each node.
          // If multiple nodes have the same key, the duplicates are added to exit.

          for (i = 0; i < groupLength; ++i) {
            if (node = group[i]) {
              keyValues[i] = keyValue = key.call(node, node.__data__, i, group) + "";

              if (nodeByKeyValue.has(keyValue)) {
                exit[i] = node;
              } else {
                nodeByKeyValue.set(keyValue, node);
              }
            }
          } // Compute the key for each datum.
          // If there a node associated with this key, join and add it to update.
          // If there is not (or the key is a duplicate), add it to enter.


          for (i = 0; i < dataLength; ++i) {
            keyValue = key.call(parent, data[i], i, data) + "";

            if (node = nodeByKeyValue.get(keyValue)) {
              update[i] = node;
              node.__data__ = data[i];
              nodeByKeyValue["delete"](keyValue);
            } else {
              enter[i] = new EnterNode(parent, data[i]);
            }
          } // Add any remaining nodes that were not bound to data to exit.


          for (i = 0; i < groupLength; ++i) {
            if ((node = group[i]) && nodeByKeyValue.get(keyValues[i]) === node) {
              exit[i] = node;
            }
          }
        }

        function datum(node) {
          return node.__data__;
        }

        function selection_data (value, key) {
          if (!arguments.length) return Array.from(this, datum);
          var bind = key ? bindKey : bindIndex,
              parents = this._parents,
              groups = this._groups;
          if (typeof value !== "function") value = constant$3(value);

          for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
            var parent = parents[j],
                group = groups[j],
                groupLength = group.length,
                data = array(value.call(parent, parent && parent.__data__, j, parents)),
                dataLength = data.length,
                enterGroup = enter[j] = new Array(dataLength),
                updateGroup = update[j] = new Array(dataLength),
                exitGroup = exit[j] = new Array(groupLength);
            bind(parent, group, enterGroup, updateGroup, exitGroup, data, key); // Now connect the enter nodes to their following update node, such that
            // appendChild can insert the materialized enter node before this node,
            // rather than at the end of the parent node.

            for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
              if (previous = enterGroup[i0]) {
                if (i0 >= i1) i1 = i0 + 1;

                while (!(next = updateGroup[i1]) && ++i1 < dataLength) {
                }

                previous._next = next || null;
              }
            }
          }

          update = new Selection$1(update, parents);
          update._enter = enter;
          update._exit = exit;
          return update;
        }

        function selection_exit () {
          return new Selection$1(this._exit || this._groups.map(sparse), this._parents);
        }

        function selection_join (onenter, onupdate, onexit) {
          var enter = this.enter(),
              update = this,
              exit = this.exit();
          enter = typeof onenter === "function" ? onenter(enter) : enter.append(onenter + "");
          if (onupdate != null) update = onupdate(update);
          if (onexit == null) exit.remove();else onexit(exit);
          return enter && update ? enter.merge(update).order() : update;
        }

        function selection_merge (selection) {
          if (!(selection instanceof Selection$1)) throw new Error("invalid merge");

          for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
            for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
              if (node = group0[i] || group1[i]) {
                merge[i] = node;
              }
            }
          }

          for (; j < m0; ++j) {
            merges[j] = groups0[j];
          }

          return new Selection$1(merges, this._parents);
        }

        function selection_order () {
          for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
            for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
              if (node = group[i]) {
                if (next && node.compareDocumentPosition(next) ^ 4) next.parentNode.insertBefore(node, next);
                next = node;
              }
            }
          }

          return this;
        }

        function selection_sort (compare) {
          if (!compare) compare = ascending;

          function compareNode(a, b) {
            return a && b ? compare(a.__data__, b.__data__) : !a - !b;
          }

          for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
            for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
              if (node = group[i]) {
                sortgroup[i] = node;
              }
            }

            sortgroup.sort(compareNode);
          }

          return new Selection$1(sortgroups, this._parents).order();
        }

        function ascending(a, b) {
          return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
        }

        function selection_call () {
          var callback = arguments[0];
          arguments[0] = this;
          callback.apply(null, arguments);
          return this;
        }

        function selection_nodes () {
          return Array.from(this);
        }

        function selection_node () {
          for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
            for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
              var node = group[i];
              if (node) return node;
            }
          }

          return null;
        }

        function selection_size () {
          var size = 0;

          var _iterator = _createForOfIteratorHelper(this),
              _step;

          try {
            for (_iterator.s(); !(_step = _iterator.n()).done;) {
              var node = _step.value;
              ++size;
            } // eslint-disable-line no-unused-vars

          } catch (err) {
            _iterator.e(err);
          } finally {
            _iterator.f();
          }

          return size;
        }

        function selection_empty () {
          return !this.node();
        }

        function selection_each (callback) {
          for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
            for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
              if (node = group[i]) callback.call(node, node.__data__, i, group);
            }
          }

          return this;
        }

        function attrRemove$1(name) {
          return function () {
            this.removeAttribute(name);
          };
        }

        function attrRemoveNS$1(fullname) {
          return function () {
            this.removeAttributeNS(fullname.space, fullname.local);
          };
        }

        function attrConstant$1(name, value) {
          return function () {
            this.setAttribute(name, value);
          };
        }

        function attrConstantNS$1(fullname, value) {
          return function () {
            this.setAttributeNS(fullname.space, fullname.local, value);
          };
        }

        function attrFunction$1(name, value) {
          return function () {
            var v = value.apply(this, arguments);
            if (v == null) this.removeAttribute(name);else this.setAttribute(name, v);
          };
        }

        function attrFunctionNS$1(fullname, value) {
          return function () {
            var v = value.apply(this, arguments);
            if (v == null) this.removeAttributeNS(fullname.space, fullname.local);else this.setAttributeNS(fullname.space, fullname.local, v);
          };
        }

        function selection_attr (name, value) {
          var fullname = namespace(name);

          if (arguments.length < 2) {
            var node = this.node();
            return fullname.local ? node.getAttributeNS(fullname.space, fullname.local) : node.getAttribute(fullname);
          }

          return this.each((value == null ? fullname.local ? attrRemoveNS$1 : attrRemove$1 : typeof value === "function" ? fullname.local ? attrFunctionNS$1 : attrFunction$1 : fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, value));
        }

        function defaultView (node) {
          return node.ownerDocument && node.ownerDocument.defaultView || // node is a Node
          node.document && node // node is a Window
          || node.defaultView; // node is a Document
        }

        function styleRemove$1(name) {
          return function () {
            this.style.removeProperty(name);
          };
        }

        function styleConstant$1(name, value, priority) {
          return function () {
            this.style.setProperty(name, value, priority);
          };
        }

        function styleFunction$1(name, value, priority) {
          return function () {
            var v = value.apply(this, arguments);
            if (v == null) this.style.removeProperty(name);else this.style.setProperty(name, v, priority);
          };
        }

        function selection_style (name, value, priority) {
          return arguments.length > 1 ? this.each((value == null ? styleRemove$1 : typeof value === "function" ? styleFunction$1 : styleConstant$1)(name, value, priority == null ? "" : priority)) : styleValue(this.node(), name);
        }
        function styleValue(node, name) {
          return node.style.getPropertyValue(name) || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
        }

        function propertyRemove(name) {
          return function () {
            delete this[name];
          };
        }

        function propertyConstant(name, value) {
          return function () {
            this[name] = value;
          };
        }

        function propertyFunction(name, value) {
          return function () {
            var v = value.apply(this, arguments);
            if (v == null) delete this[name];else this[name] = v;
          };
        }

        function selection_property (name, value) {
          return arguments.length > 1 ? this.each((value == null ? propertyRemove : typeof value === "function" ? propertyFunction : propertyConstant)(name, value)) : this.node()[name];
        }

        function classArray(string) {
          return string.trim().split(/^|\s+/);
        }

        function classList(node) {
          return node.classList || new ClassList(node);
        }

        function ClassList(node) {
          this._node = node;
          this._names = classArray(node.getAttribute("class") || "");
        }

        ClassList.prototype = {
          add: function add(name) {
            var i = this._names.indexOf(name);

            if (i < 0) {
              this._names.push(name);

              this._node.setAttribute("class", this._names.join(" "));
            }
          },
          remove: function remove(name) {
            var i = this._names.indexOf(name);

            if (i >= 0) {
              this._names.splice(i, 1);

              this._node.setAttribute("class", this._names.join(" "));
            }
          },
          contains: function contains(name) {
            return this._names.indexOf(name) >= 0;
          }
        };

        function classedAdd(node, names) {
          var list = classList(node),
              i = -1,
              n = names.length;

          while (++i < n) {
            list.add(names[i]);
          }
        }

        function classedRemove(node, names) {
          var list = classList(node),
              i = -1,
              n = names.length;

          while (++i < n) {
            list.remove(names[i]);
          }
        }

        function classedTrue(names) {
          return function () {
            classedAdd(this, names);
          };
        }

        function classedFalse(names) {
          return function () {
            classedRemove(this, names);
          };
        }

        function classedFunction(names, value) {
          return function () {
            (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
          };
        }

        function selection_classed (name, value) {
          var names = classArray(name + "");

          if (arguments.length < 2) {
            var list = classList(this.node()),
                i = -1,
                n = names.length;

            while (++i < n) {
              if (!list.contains(names[i])) return false;
            }

            return true;
          }

          return this.each((typeof value === "function" ? classedFunction : value ? classedTrue : classedFalse)(names, value));
        }

        function textRemove() {
          this.textContent = "";
        }

        function textConstant$1(value) {
          return function () {
            this.textContent = value;
          };
        }

        function textFunction$1(value) {
          return function () {
            var v = value.apply(this, arguments);
            this.textContent = v == null ? "" : v;
          };
        }

        function selection_text (value) {
          return arguments.length ? this.each(value == null ? textRemove : (typeof value === "function" ? textFunction$1 : textConstant$1)(value)) : this.node().textContent;
        }

        function htmlRemove() {
          this.innerHTML = "";
        }

        function htmlConstant(value) {
          return function () {
            this.innerHTML = value;
          };
        }

        function htmlFunction(value) {
          return function () {
            var v = value.apply(this, arguments);
            this.innerHTML = v == null ? "" : v;
          };
        }

        function selection_html (value) {
          return arguments.length ? this.each(value == null ? htmlRemove : (typeof value === "function" ? htmlFunction : htmlConstant)(value)) : this.node().innerHTML;
        }

        function raise() {
          if (this.nextSibling) this.parentNode.appendChild(this);
        }

        function selection_raise () {
          return this.each(raise);
        }

        function lower() {
          if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
        }

        function selection_lower () {
          return this.each(lower);
        }

        function selection_append (name) {
          var create = typeof name === "function" ? name : creator(name);
          return this.select(function () {
            return this.appendChild(create.apply(this, arguments));
          });
        }

        function constantNull() {
          return null;
        }

        function selection_insert (name, before) {
          var create = typeof name === "function" ? name : creator(name),
              select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
          return this.select(function () {
            return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
          });
        }

        function remove$7() {
          var parent = this.parentNode;
          if (parent) parent.removeChild(this);
        }

        function selection_remove () {
          return this.each(remove$7);
        }

        function selection_cloneShallow() {
          var clone = this.cloneNode(false),
              parent = this.parentNode;
          return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
        }

        function selection_cloneDeep() {
          var clone = this.cloneNode(true),
              parent = this.parentNode;
          return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
        }

        function selection_clone (deep) {
          return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
        }

        function selection_datum (value) {
          return arguments.length ? this.property("__data__", value) : this.node().__data__;
        }

        function contextListener(listener) {
          return function (event) {
            listener.call(this, event, this.__data__);
          };
        }

        function parseTypenames(typenames) {
          return typenames.trim().split(/^|\s+/).map(function (t) {
            var name = "",
                i = t.indexOf(".");
            if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
            return {
              type: t,
              name: name
            };
          });
        }

        function onRemove(typename) {
          return function () {
            var on = this.__on;
            if (!on) return;

            for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
              if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
                this.removeEventListener(o.type, o.listener, o.options);
              } else {
                on[++i] = o;
              }
            }

            if (++i) on.length = i;else delete this.__on;
          };
        }

        function onAdd(typename, value, options) {
          return function () {
            var on = this.__on,
                o,
                listener = contextListener(value);
            if (on) for (var j = 0, m = on.length; j < m; ++j) {
              if ((o = on[j]).type === typename.type && o.name === typename.name) {
                this.removeEventListener(o.type, o.listener, o.options);
                this.addEventListener(o.type, o.listener = listener, o.options = options);
                o.value = value;
                return;
              }
            }
            this.addEventListener(typename.type, listener, options);
            o = {
              type: typename.type,
              name: typename.name,
              value: value,
              listener: listener,
              options: options
            };
            if (!on) this.__on = [o];else on.push(o);
          };
        }

        function selection_on (typename, value, options) {
          var typenames = parseTypenames(typename + ""),
              i,
              n = typenames.length,
              t;

          if (arguments.length < 2) {
            var on = this.node().__on;

            if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
              for (i = 0, o = on[j]; i < n; ++i) {
                if ((t = typenames[i]).type === o.type && t.name === o.name) {
                  return o.value;
                }
              }
            }
            return;
          }

          on = value ? onAdd : onRemove;

          for (i = 0; i < n; ++i) {
            this.each(on(typenames[i], value, options));
          }

          return this;
        }

        function dispatchEvent(node, type, params) {
          var window = defaultView(node),
              event = window.CustomEvent;

          if (typeof event === "function") {
            event = new event(type, params);
          } else {
            event = window.document.createEvent("Event");
            if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;else event.initEvent(type, false, false);
          }

          node.dispatchEvent(event);
        }

        function dispatchConstant(type, params) {
          return function () {
            return dispatchEvent(this, type, params);
          };
        }

        function dispatchFunction(type, params) {
          return function () {
            return dispatchEvent(this, type, params.apply(this, arguments));
          };
        }

        function selection_dispatch (type, params) {
          return this.each((typeof params === "function" ? dispatchFunction : dispatchConstant)(type, params));
        }

        var _marked$1 = /*#__PURE__*/regeneratorRuntime.mark(_callee);

        function _callee() {
          var groups, j, m, group, i, n, node;
          return regeneratorRuntime.wrap(function _callee$(_context) {
            while (1) {
              switch (_context.prev = _context.next) {
                case 0:
                  groups = this._groups, j = 0, m = groups.length;

                case 1:
                  if (!(j < m)) {
                    _context.next = 13;
                    break;
                  }

                  group = groups[j], i = 0, n = group.length;

                case 3:
                  if (!(i < n)) {
                    _context.next = 10;
                    break;
                  }

                  if (!(node = group[i])) {
                    _context.next = 7;
                    break;
                  }

                  _context.next = 7;
                  return node;

                case 7:
                  ++i;
                  _context.next = 3;
                  break;

                case 10:
                  ++j;
                  _context.next = 1;
                  break;

                case 13:
                case "end":
                  return _context.stop();
              }
            }
          }, _marked$1, this);
        }

        var root$1 = [null];
        function Selection$1(groups, parents) {
          this._groups = groups;
          this._parents = parents;
        }

        function selection() {
          return new Selection$1([[document.documentElement]], root$1);
        }

        function selection_selection() {
          return this;
        }

        Selection$1.prototype = selection.prototype = _defineProperty({
          constructor: Selection$1,
          select: selection_select,
          selectAll: selection_selectAll,
          selectChild: selection_selectChild,
          selectChildren: selection_selectChildren,
          filter: selection_filter,
          data: selection_data,
          enter: selection_enter,
          exit: selection_exit,
          join: selection_join,
          merge: selection_merge,
          selection: selection_selection,
          order: selection_order,
          sort: selection_sort,
          call: selection_call,
          nodes: selection_nodes,
          node: selection_node,
          size: selection_size,
          empty: selection_empty,
          each: selection_each,
          attr: selection_attr,
          style: selection_style,
          property: selection_property,
          classed: selection_classed,
          text: selection_text,
          html: selection_html,
          raise: selection_raise,
          lower: selection_lower,
          append: selection_append,
          insert: selection_insert,
          remove: selection_remove,
          clone: selection_clone,
          datum: selection_datum,
          on: selection_on,
          dispatch: selection_dispatch
        }, Symbol.iterator, _callee);

        function select (selector) {
          return typeof selector === "string" ? new Selection$1([[document.querySelector(selector)]], [document.documentElement]) : new Selection$1([[selector]], root$1);
        }

        function sourceEvent (event) {
          var sourceEvent;

          while (sourceEvent = event.sourceEvent) {
            event = sourceEvent;
          }

          return event;
        }

        function pointer (event, node) {
          event = sourceEvent(event);
          if (node === undefined) node = event.currentTarget;

          if (node) {
            var svg = node.ownerSVGElement || node;

            if (svg.createSVGPoint) {
              var point = svg.createSVGPoint();
              point.x = event.clientX, point.y = event.clientY;
              point = point.matrixTransform(node.getScreenCTM().inverse());
              return [point.x, point.y];
            }

            if (node.getBoundingClientRect) {
              var rect = node.getBoundingClientRect();
              return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
            }
          }

          return [event.pageX, event.pageY];
        }

        function selectAll (selector) {
          return typeof selector === "string" ? new Selection$1([document.querySelectorAll(selector)], [document.documentElement]) : new Selection$1([selector == null ? [] : array(selector)], root$1);
        }

        function nopropagation$1(event) {
          event.stopImmediatePropagation();
        }
        function noevent$1 (event) {
          event.preventDefault();
          event.stopImmediatePropagation();
        }

        function dragDisable (view) {
          var root = view.document.documentElement,
              selection = select(view).on("dragstart.drag", noevent$1, true);

          if ("onselectstart" in root) {
            selection.on("selectstart.drag", noevent$1, true);
          } else {
            root.__noselect = root.style.MozUserSelect;
            root.style.MozUserSelect = "none";
          }
        }
        function yesdrag(view, noclick) {
          var root = view.document.documentElement,
              selection = select(view).on("dragstart.drag", null);

          if (noclick) {
            selection.on("click.drag", noevent$1, true);
            setTimeout(function () {
              selection.on("click.drag", null);
            }, 0);
          }

          if ("onselectstart" in root) {
            selection.on("selectstart.drag", null);
          } else {
            root.style.MozUserSelect = root.__noselect;
            delete root.__noselect;
          }
        }

        var constant$2 = (function (x) {
          return function () {
            return x;
          };
        });

        function DragEvent(type, _ref) {
          var sourceEvent = _ref.sourceEvent,
              subject = _ref.subject,
              target = _ref.target,
              identifier = _ref.identifier,
              active = _ref.active,
              x = _ref.x,
              y = _ref.y,
              dx = _ref.dx,
              dy = _ref.dy,
              dispatch = _ref.dispatch;
          Object.defineProperties(this, {
            type: {
              value: type,
              enumerable: true,
              configurable: true
            },
            sourceEvent: {
              value: sourceEvent,
              enumerable: true,
              configurable: true
            },
            subject: {
              value: subject,
              enumerable: true,
              configurable: true
            },
            target: {
              value: target,
              enumerable: true,
              configurable: true
            },
            identifier: {
              value: identifier,
              enumerable: true,
              configurable: true
            },
            active: {
              value: active,
              enumerable: true,
              configurable: true
            },
            x: {
              value: x,
              enumerable: true,
              configurable: true
            },
            y: {
              value: y,
              enumerable: true,
              configurable: true
            },
            dx: {
              value: dx,
              enumerable: true,
              configurable: true
            },
            dy: {
              value: dy,
              enumerable: true,
              configurable: true
            },
            _: {
              value: dispatch
            }
          });
        }

        DragEvent.prototype.on = function () {
          var value = this._.on.apply(this._, arguments);

          return value === this._ ? this : value;
        };

        function defaultFilter$2(event) {
          return !event.ctrlKey && !event.button;
        }

        function defaultContainer() {
          return this.parentNode;
        }

        function defaultSubject(event, d) {
          return d == null ? {
            x: event.x,
            y: event.y
          } : d;
        }

        function defaultTouchable$1() {
          return navigator.maxTouchPoints || "ontouchstart" in this;
        }

        function d3_drag () {
          var filter = defaultFilter$2,
              container = defaultContainer,
              subject = defaultSubject,
              touchable = defaultTouchable$1,
              gestures = {},
              listeners = dispatch$8("start", "drag", "end"),
              active = 0,
              mousedownx,
              mousedowny,
              mousemoving,
              touchending,
              clickDistance2 = 0;

          function drag(selection) {
            selection.on("mousedown.drag", mousedowned).filter(touchable).on("touchstart.drag", touchstarted).on("touchmove.drag", touchmoved).on("touchend.drag touchcancel.drag", touchended).style("touch-action", "none").style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
          }

          function mousedowned(event, d) {
            if (touchending || !filter.call(this, event, d)) return;
            var gesture = beforestart(this, container.call(this, event, d), event, d, "mouse");
            if (!gesture) return;
            select(event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
            dragDisable(event.view);
            nopropagation$1(event);
            mousemoving = false;
            mousedownx = event.clientX;
            mousedowny = event.clientY;
            gesture("start", event);
          }

          function mousemoved(event) {
            noevent$1(event);

            if (!mousemoving) {
              var dx = event.clientX - mousedownx,
                  dy = event.clientY - mousedowny;
              mousemoving = dx * dx + dy * dy > clickDistance2;
            }

            gestures.mouse("drag", event);
          }

          function mouseupped(event) {
            select(event.view).on("mousemove.drag mouseup.drag", null);
            yesdrag(event.view, mousemoving);
            noevent$1(event);
            gestures.mouse("end", event);
          }

          function touchstarted(event, d) {
            if (!filter.call(this, event, d)) return;
            var touches = event.changedTouches,
                c = container.call(this, event, d),
                n = touches.length,
                i,
                gesture;

            for (i = 0; i < n; ++i) {
              if (gesture = beforestart(this, c, event, d, touches[i].identifier, touches[i])) {
                nopropagation$1(event);
                gesture("start", event, touches[i]);
              }
            }
          }

          function touchmoved(event) {
            var touches = event.changedTouches,
                n = touches.length,
                i,
                gesture;

            for (i = 0; i < n; ++i) {
              if (gesture = gestures[touches[i].identifier]) {
                noevent$1(event);
                gesture("drag", event, touches[i]);
              }
            }
          }

          function touchended(event) {
            var touches = event.changedTouches,
                n = touches.length,
                i,
                gesture;
            if (touchending) clearTimeout(touchending);
            touchending = setTimeout(function () {
              touchending = null;
            }, 500); // Ghost clicks are delayed!

            for (i = 0; i < n; ++i) {
              if (gesture = gestures[touches[i].identifier]) {
                nopropagation$1(event);
                gesture("end", event, touches[i]);
              }
            }
          }

          function beforestart(that, container, event, d, identifier, touch) {
            var dispatch = listeners.copy(),
                p = pointer(touch || event, container),
                dx,
                dy,
                s;
            if ((s = subject.call(that, new DragEvent("beforestart", {
              sourceEvent: event,
              target: drag,
              identifier: identifier,
              active: active,
              x: p[0],
              y: p[1],
              dx: 0,
              dy: 0,
              dispatch: dispatch
            }), d)) == null) return;
            dx = s.x - p[0] || 0;
            dy = s.y - p[1] || 0;
            return function gesture(type, event, touch) {
              var p0 = p,
                  n;

              switch (type) {
                case "start":
                  gestures[identifier] = gesture, n = active++;
                  break;

                case "end":
                  delete gestures[identifier], --active;
                // nobreak

                case "drag":
                  p = pointer(touch || event, container), n = active;
                  break;
              }

              dispatch.call(type, that, new DragEvent(type, {
                sourceEvent: event,
                subject: s,
                target: drag,
                identifier: identifier,
                active: n,
                x: p[0] + dx,
                y: p[1] + dy,
                dx: p[0] - p0[0],
                dy: p[1] - p0[1],
                dispatch: dispatch
              }), d);
            };
          }

          drag.filter = function (_) {
            return arguments.length ? (filter = typeof _ === "function" ? _ : constant$2(!!_), drag) : filter;
          };

          drag.container = function (_) {
            return arguments.length ? (container = typeof _ === "function" ? _ : constant$2(_), drag) : container;
          };

          drag.subject = function (_) {
            return arguments.length ? (subject = typeof _ === "function" ? _ : constant$2(_), drag) : subject;
          };

          drag.touchable = function (_) {
            return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$2(!!_), drag) : touchable;
          };

          drag.on = function () {
            var value = listeners.on.apply(listeners, arguments);
            return value === listeners ? drag : value;
          };

          drag.clickDistance = function (_) {
            return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
          };

          return drag;
        }

        var defineProperty$1 = objectDefineProperty.f;
        var getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;






        var enforceInternalState = internalState.enforce;





        var MATCH$1 = wellKnownSymbol('match');
        var NativeRegExp = global$2.RegExp;
        var RegExpPrototype = NativeRegExp.prototype;
        // TODO: Use only propper RegExpIdentifierName
        var IS_NCG = /^\?<[^\s\d!#%&*+<=>@^][^\s!#%&*+<=>@^]*>/;
        var re1 = /a/g;
        var re2 = /a/g;

        // "new" should create a new object, old webkit bug
        var CORRECT_NEW = new NativeRegExp(re1) !== re1;

        var UNSUPPORTED_Y = regexpStickyHelpers.UNSUPPORTED_Y;

        var BASE_FORCED = descriptors &&
          (!CORRECT_NEW || UNSUPPORTED_Y || regexpUnsupportedDotAll || regexpUnsupportedNcg || fails(function () {
            re2[MATCH$1] = false;
            // RegExp constructor can alter flags and IsRegExp works correct with @@match
            return NativeRegExp(re1) != re1 || NativeRegExp(re2) == re2 || NativeRegExp(re1, 'i') != '/a/i';
          }));

        var handleDotAll = function (string) {
          var length = string.length;
          var index = 0;
          var result = '';
          var brackets = false;
          var chr;
          for (; index <= length; index++) {
            chr = string.charAt(index);
            if (chr === '\\') {
              result += chr + string.charAt(++index);
              continue;
            }
            if (!brackets && chr === '.') {
              result += '[\\s\\S]';
            } else {
              if (chr === '[') {
                brackets = true;
              } else if (chr === ']') {
                brackets = false;
              } result += chr;
            }
          } return result;
        };

        var handleNCG = function (string) {
          var length = string.length;
          var index = 0;
          var result = '';
          var named = [];
          var names = {};
          var brackets = false;
          var ncg = false;
          var groupid = 0;
          var groupname = '';
          var chr;
          for (; index <= length; index++) {
            chr = string.charAt(index);
            if (chr === '\\') {
              chr = chr + string.charAt(++index);
            } else if (chr === ']') {
              brackets = false;
            } else if (!brackets) switch (true) {
              case chr === '[':
                brackets = true;
                break;
              case chr === '(':
                if (IS_NCG.test(string.slice(index + 1))) {
                  index += 2;
                  ncg = true;
                }
                result += chr;
                groupid++;
                continue;
              case chr === '>' && ncg:
                if (groupname === '' || has$1(names, groupname)) {
                  throw new SyntaxError('Invalid capture group name');
                }
                names[groupname] = true;
                named.push([groupname, groupid]);
                ncg = false;
                groupname = '';
                continue;
            }
            if (ncg) groupname += chr;
            else result += chr;
          } return [result, named];
        };

        // `RegExp` constructor
        // https://tc39.es/ecma262/#sec-regexp-constructor
        if (isForced_1('RegExp', BASE_FORCED)) {
          var RegExpWrapper = function RegExp(pattern, flags) {
            var thisIsRegExp = this instanceof RegExpWrapper;
            var patternIsRegExp = isRegexp(pattern);
            var flagsAreUndefined = flags === undefined;
            var groups = [];
            var rawPattern, rawFlags, dotAll, sticky, handled, result, state;

            if (!thisIsRegExp && patternIsRegExp && pattern.constructor === RegExpWrapper && flagsAreUndefined) {
              return pattern;
            }

            if (CORRECT_NEW) {
              if (patternIsRegExp && !flagsAreUndefined) pattern = pattern.source;
            } else if (pattern instanceof RegExpWrapper) {
              if (flagsAreUndefined) flags = regexpFlags.call(pattern);
              pattern = pattern.source;
            }

            pattern = pattern === undefined ? '' : String(pattern);
            flags = flags === undefined ? '' : String(flags);
            rawPattern = pattern;

            if (regexpUnsupportedDotAll && 'dotAll' in re1) {
              dotAll = !!flags && flags.indexOf('s') > -1;
              if (dotAll) flags = flags.replace(/s/g, '');
            }

            rawFlags = flags;

            if (UNSUPPORTED_Y && 'sticky' in re1) {
              sticky = !!flags && flags.indexOf('y') > -1;
              if (sticky) flags = flags.replace(/y/g, '');
            }

            if (regexpUnsupportedNcg) {
              handled = handleNCG(pattern);
              pattern = handled[0];
              groups = handled[1];
            }

            result = inheritIfRequired(
              CORRECT_NEW ? new NativeRegExp(pattern, flags) : NativeRegExp(pattern, flags),
              thisIsRegExp ? this : RegExpPrototype,
              RegExpWrapper
            );

            if (dotAll || sticky || groups.length) {
              state = enforceInternalState(result);
              if (dotAll) {
                state.dotAll = true;
                state.raw = RegExpWrapper(handleDotAll(pattern), rawFlags);
              }
              if (sticky) state.sticky = true;
              if (groups.length) state.groups = groups;
            }

            if (pattern !== rawPattern) try {
              // fails in old engines, but we have no alternatives for unsupported regex syntax
              createNonEnumerableProperty(result, 'source', rawPattern === '' ? '(?:)' : rawPattern);
            } catch (error) { /* empty */ }

            return result;
          };

          var proxy = function (key) {
            key in RegExpWrapper || defineProperty$1(RegExpWrapper, key, {
              configurable: true,
              get: function () { return NativeRegExp[key]; },
              set: function (it) { NativeRegExp[key] = it; }
            });
          };

          for (var keys$1 = getOwnPropertyNames$1(NativeRegExp), index$1 = 0; keys$1.length > index$1;) {
            proxy(keys$1[index$1++]);
          }

          RegExpPrototype.constructor = RegExpWrapper;
          RegExpWrapper.prototype = RegExpPrototype;
          redefine(global$2, 'RegExp', RegExpWrapper);
        }

        // https://tc39.es/ecma262/#sec-get-regexp-@@species
        setSpecies('RegExp');

        function define (constructor, factory, prototype) {
          constructor.prototype = factory.prototype = prototype;
          prototype.constructor = constructor;
        }
        function extend$3(parent, definition) {
          var prototype = Object.create(parent.prototype);

          for (var key in definition) {
            prototype[key] = definition[key];
          }

          return prototype;
        }

        function Color() {}
        var _darker = 0.7;

        var _brighter = 1 / _darker;
        var reI = "\\s*([+-]?\\d+)\\s*",
            reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
            reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
            reHex = /^#([0-9a-f]{3,8})$/,
            reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
            reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
            reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
            reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"),
            reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"),
            reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
        var named = {
          aliceblue: 0xf0f8ff,
          antiquewhite: 0xfaebd7,
          aqua: 0x00ffff,
          aquamarine: 0x7fffd4,
          azure: 0xf0ffff,
          beige: 0xf5f5dc,
          bisque: 0xffe4c4,
          black: 0x000000,
          blanchedalmond: 0xffebcd,
          blue: 0x0000ff,
          blueviolet: 0x8a2be2,
          brown: 0xa52a2a,
          burlywood: 0xdeb887,
          cadetblue: 0x5f9ea0,
          chartreuse: 0x7fff00,
          chocolate: 0xd2691e,
          coral: 0xff7f50,
          cornflowerblue: 0x6495ed,
          cornsilk: 0xfff8dc,
          crimson: 0xdc143c,
          cyan: 0x00ffff,
          darkblue: 0x00008b,
          darkcyan: 0x008b8b,
          darkgoldenrod: 0xb8860b,
          darkgray: 0xa9a9a9,
          darkgreen: 0x006400,
          darkgrey: 0xa9a9a9,
          darkkhaki: 0xbdb76b,
          darkmagenta: 0x8b008b,
          darkolivegreen: 0x556b2f,
          darkorange: 0xff8c00,
          darkorchid: 0x9932cc,
          darkred: 0x8b0000,
          darksalmon: 0xe9967a,
          darkseagreen: 0x8fbc8f,
          darkslateblue: 0x483d8b,
          darkslategray: 0x2f4f4f,
          darkslategrey: 0x2f4f4f,
          darkturquoise: 0x00ced1,
          darkviolet: 0x9400d3,
          deeppink: 0xff1493,
          deepskyblue: 0x00bfff,
          dimgray: 0x696969,
          dimgrey: 0x696969,
          dodgerblue: 0x1e90ff,
          firebrick: 0xb22222,
          floralwhite: 0xfffaf0,
          forestgreen: 0x228b22,
          fuchsia: 0xff00ff,
          gainsboro: 0xdcdcdc,
          ghostwhite: 0xf8f8ff,
          gold: 0xffd700,
          goldenrod: 0xdaa520,
          gray: 0x808080,
          green: 0x008000,
          greenyellow: 0xadff2f,
          grey: 0x808080,
          honeydew: 0xf0fff0,
          hotpink: 0xff69b4,
          indianred: 0xcd5c5c,
          indigo: 0x4b0082,
          ivory: 0xfffff0,
          khaki: 0xf0e68c,
          lavender: 0xe6e6fa,
          lavenderblush: 0xfff0f5,
          lawngreen: 0x7cfc00,
          lemonchiffon: 0xfffacd,
          lightblue: 0xadd8e6,
          lightcoral: 0xf08080,
          lightcyan: 0xe0ffff,
          lightgoldenrodyellow: 0xfafad2,
          lightgray: 0xd3d3d3,
          lightgreen: 0x90ee90,
          lightgrey: 0xd3d3d3,
          lightpink: 0xffb6c1,
          lightsalmon: 0xffa07a,
          lightseagreen: 0x20b2aa,
          lightskyblue: 0x87cefa,
          lightslategray: 0x778899,
          lightslategrey: 0x778899,
          lightsteelblue: 0xb0c4de,
          lightyellow: 0xffffe0,
          lime: 0x00ff00,
          limegreen: 0x32cd32,
          linen: 0xfaf0e6,
          magenta: 0xff00ff,
          maroon: 0x800000,
          mediumaquamarine: 0x66cdaa,
          mediumblue: 0x0000cd,
          mediumorchid: 0xba55d3,
          mediumpurple: 0x9370db,
          mediumseagreen: 0x3cb371,
          mediumslateblue: 0x7b68ee,
          mediumspringgreen: 0x00fa9a,
          mediumturquoise: 0x48d1cc,
          mediumvioletred: 0xc71585,
          midnightblue: 0x191970,
          mintcream: 0xf5fffa,
          mistyrose: 0xffe4e1,
          moccasin: 0xffe4b5,
          navajowhite: 0xffdead,
          navy: 0x000080,
          oldlace: 0xfdf5e6,
          olive: 0x808000,
          olivedrab: 0x6b8e23,
          orange: 0xffa500,
          orangered: 0xff4500,
          orchid: 0xda70d6,
          palegoldenrod: 0xeee8aa,
          palegreen: 0x98fb98,
          paleturquoise: 0xafeeee,
          palevioletred: 0xdb7093,
          papayawhip: 0xffefd5,
          peachpuff: 0xffdab9,
          peru: 0xcd853f,
          pink: 0xffc0cb,
          plum: 0xdda0dd,
          powderblue: 0xb0e0e6,
          purple: 0x800080,
          rebeccapurple: 0x663399,
          red: 0xff0000,
          rosybrown: 0xbc8f8f,
          royalblue: 0x4169e1,
          saddlebrown: 0x8b4513,
          salmon: 0xfa8072,
          sandybrown: 0xf4a460,
          seagreen: 0x2e8b57,
          seashell: 0xfff5ee,
          sienna: 0xa0522d,
          silver: 0xc0c0c0,
          skyblue: 0x87ceeb,
          slateblue: 0x6a5acd,
          slategray: 0x708090,
          slategrey: 0x708090,
          snow: 0xfffafa,
          springgreen: 0x00ff7f,
          steelblue: 0x4682b4,
          tan: 0xd2b48c,
          teal: 0x008080,
          thistle: 0xd8bfd8,
          tomato: 0xff6347,
          turquoise: 0x40e0d0,
          violet: 0xee82ee,
          wheat: 0xf5deb3,
          white: 0xffffff,
          whitesmoke: 0xf5f5f5,
          yellow: 0xffff00,
          yellowgreen: 0x9acd32
        };
        define(Color, color, {
          copy: function copy(channels) {
            return Object.assign(new this.constructor(), this, channels);
          },
          displayable: function displayable() {
            return this.rgb().displayable();
          },
          hex: color_formatHex,
          // Deprecated! Use color.formatHex.
          formatHex: color_formatHex,
          formatHsl: color_formatHsl,
          formatRgb: color_formatRgb,
          toString: color_formatRgb
        });

        function color_formatHex() {
          return this.rgb().formatHex();
        }

        function color_formatHsl() {
          return hslConvert(this).formatHsl();
        }

        function color_formatRgb() {
          return this.rgb().formatRgb();
        }

        function color(format) {
          var m, l;
          format = (format + "").trim().toLowerCase();
          return (m = reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? rgbn(m) // #ff0000
          : l === 3 ? new Rgb(m >> 8 & 0xf | m >> 4 & 0xf0, m >> 4 & 0xf | m & 0xf0, (m & 0xf) << 4 | m & 0xf, 1) // #f00
          : l === 8 ? rgba(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000
          : l === 4 ? rgba(m >> 12 & 0xf | m >> 8 & 0xf0, m >> 8 & 0xf | m >> 4 & 0xf0, m >> 4 & 0xf | m & 0xf0, ((m & 0xf) << 4 | m & 0xf) / 0xff) // #f000
          : null // invalid hex
          ) : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
          : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
          : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
          : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
          : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
          : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
          : named.hasOwnProperty(format) ? rgbn(named[format]) // eslint-disable-line no-prototype-builtins
          : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0) : null;
        }

        function rgbn(n) {
          return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
        }

        function rgba(r, g, b, a) {
          if (a <= 0) r = g = b = NaN;
          return new Rgb(r, g, b, a);
        }

        function rgbConvert(o) {
          if (!(o instanceof Color)) o = color(o);
          if (!o) return new Rgb();
          o = o.rgb();
          return new Rgb(o.r, o.g, o.b, o.opacity);
        }
        function rgb(r, g, b, opacity) {
          return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
        }
        function Rgb(r, g, b, opacity) {
          this.r = +r;
          this.g = +g;
          this.b = +b;
          this.opacity = +opacity;
        }
        define(Rgb, rgb, extend$3(Color, {
          brighter: function brighter(k) {
            k = k == null ? _brighter : Math.pow(_brighter, k);
            return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
          },
          darker: function darker(k) {
            k = k == null ? _darker : Math.pow(_darker, k);
            return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
          },
          rgb: function rgb() {
            return this;
          },
          displayable: function displayable() {
            return -0.5 <= this.r && this.r < 255.5 && -0.5 <= this.g && this.g < 255.5 && -0.5 <= this.b && this.b < 255.5 && 0 <= this.opacity && this.opacity <= 1;
          },
          hex: rgb_formatHex,
          // Deprecated! Use color.formatHex.
          formatHex: rgb_formatHex,
          formatRgb: rgb_formatRgb,
          toString: rgb_formatRgb
        }));

        function rgb_formatHex() {
          return "#" + hex$1(this.r) + hex$1(this.g) + hex$1(this.b);
        }

        function rgb_formatRgb() {
          var a = this.opacity;
          a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
          return (a === 1 ? "rgb(" : "rgba(") + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", " + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", " + Math.max(0, Math.min(255, Math.round(this.b) || 0)) + (a === 1 ? ")" : ", " + a + ")");
        }

        function hex$1(value) {
          value = Math.max(0, Math.min(255, Math.round(value) || 0));
          return (value < 16 ? "0" : "") + value.toString(16);
        }

        function hsla(h, s, l, a) {
          if (a <= 0) h = s = l = NaN;else if (l <= 0 || l >= 1) h = s = NaN;else if (s <= 0) h = NaN;
          return new Hsl(h, s, l, a);
        }

        function hslConvert(o) {
          if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
          if (!(o instanceof Color)) o = color(o);
          if (!o) return new Hsl();
          if (o instanceof Hsl) return o;
          o = o.rgb();
          var r = o.r / 255,
              g = o.g / 255,
              b = o.b / 255,
              min = Math.min(r, g, b),
              max = Math.max(r, g, b),
              h = NaN,
              s = max - min,
              l = (max + min) / 2;

          if (s) {
            if (r === max) h = (g - b) / s + (g < b) * 6;else if (g === max) h = (b - r) / s + 2;else h = (r - g) / s + 4;
            s /= l < 0.5 ? max + min : 2 - max - min;
            h *= 60;
          } else {
            s = l > 0 && l < 1 ? 0 : h;
          }

          return new Hsl(h, s, l, o.opacity);
        }
        function hsl(h, s, l, opacity) {
          return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
        }

        function Hsl(h, s, l, opacity) {
          this.h = +h;
          this.s = +s;
          this.l = +l;
          this.opacity = +opacity;
        }

        define(Hsl, hsl, extend$3(Color, {
          brighter: function brighter(k) {
            k = k == null ? _brighter : Math.pow(_brighter, k);
            return new Hsl(this.h, this.s, this.l * k, this.opacity);
          },
          darker: function darker(k) {
            k = k == null ? _darker : Math.pow(_darker, k);
            return new Hsl(this.h, this.s, this.l * k, this.opacity);
          },
          rgb: function rgb() {
            var h = this.h % 360 + (this.h < 0) * 360,
                s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
                l = this.l,
                m2 = l + (l < 0.5 ? l : 1 - l) * s,
                m1 = 2 * l - m2;
            return new Rgb(hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2), hsl2rgb(h, m1, m2), hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2), this.opacity);
          },
          displayable: function displayable() {
            return (0 <= this.s && this.s <= 1 || isNaN(this.s)) && 0 <= this.l && this.l <= 1 && 0 <= this.opacity && this.opacity <= 1;
          },
          formatHsl: function formatHsl() {
            var a = this.opacity;
            a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
            return (a === 1 ? "hsl(" : "hsla(") + (this.h || 0) + ", " + (this.s || 0) * 100 + "%, " + (this.l || 0) * 100 + "%" + (a === 1 ? ")" : ", " + a + ")");
          }
        }));
        /* From FvD 13.37, CSS Color Module Level 3 */

        function hsl2rgb(h, m1, m2) {
          return (h < 60 ? m1 + (m2 - m1) * h / 60 : h < 180 ? m2 : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60 : m1) * 255;
        }

        var constant$1 = (function (x) {
          return function () {
            return x;
          };
        });

        function linear$2(a, d) {
          return function (t) {
            return a + t * d;
          };
        }

        function exponential(a, b, y) {
          return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function (t) {
            return Math.pow(a + t * b, y);
          };
        }
        function gamma(y) {
          return (y = +y) === 1 ? nogamma : function (a, b) {
            return b - a ? exponential(a, b, y) : constant$1(isNaN(a) ? b : a);
          };
        }
        function nogamma(a, b) {
          var d = b - a;
          return d ? linear$2(a, d) : constant$1(isNaN(a) ? b : a);
        }

        var d3_interpolateRgb = (function rgbGamma(y) {
          var color = gamma(y);

          function rgb$1(start, end) {
            var r = color((start = rgb(start)).r, (end = rgb(end)).r),
                g = color(start.g, end.g),
                b = color(start.b, end.b),
                opacity = nogamma(start.opacity, end.opacity);
            return function (t) {
              start.r = r(t);
              start.g = g(t);
              start.b = b(t);
              start.opacity = opacity(t);
              return start + "";
            };
          }

          rgb$1.gamma = rgbGamma;
          return rgb$1;
        })(1);

        function numberArray (a, b) {
          if (!b) b = [];
          var n = a ? Math.min(b.length, a.length) : 0,
              c = b.slice(),
              i;
          return function (t) {
            for (i = 0; i < n; ++i) {
              c[i] = a[i] * (1 - t) + b[i] * t;
            }

            return c;
          };
        }
        function isNumberArray(x) {
          return ArrayBuffer.isView(x) && !(x instanceof DataView);
        }

        function genericArray(a, b) {
          var nb = b ? b.length : 0,
              na = a ? Math.min(nb, a.length) : 0,
              x = new Array(na),
              c = new Array(nb),
              i;

          for (i = 0; i < na; ++i) {
            x[i] = interpolate$1(a[i], b[i]);
          }

          for (; i < nb; ++i) {
            c[i] = b[i];
          }

          return function (t) {
            for (i = 0; i < na; ++i) {
              c[i] = x[i](t);
            }

            return c;
          };
        }

        function date (a, b) {
          var d = new Date();
          return a = +a, b = +b, function (t) {
            return d.setTime(a * (1 - t) + b * t), d;
          };
        }

        function d3_interpolateNumber (a, b) {
          return a = +a, b = +b, function (t) {
            return a * (1 - t) + b * t;
          };
        }

        function object (a, b) {
          var i = {},
              c = {},
              k;
          if (a === null || _typeof(a) !== "object") a = {};
          if (b === null || _typeof(b) !== "object") b = {};

          for (k in b) {
            if (k in a) {
              i[k] = interpolate$1(a[k], b[k]);
            } else {
              c[k] = b[k];
            }
          }

          return function (t) {
            for (k in i) {
              c[k] = i[k](t);
            }

            return c;
          };
        }

        var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
            reB = new RegExp(reA.source, "g");

        function zero(b) {
          return function () {
            return b;
          };
        }

        function one(b) {
          return function (t) {
            return b(t) + "";
          };
        }

        function interpolateString (a, b) {
          var bi = reA.lastIndex = reB.lastIndex = 0,
              // scan index for next number in b
          am,
              // current match in a
          bm,
              // current match in b
          bs,
              // string preceding current number in b, if any
          i = -1,
              // index in s
          s = [],
              // string constants and placeholders
          q = []; // number interpolators
          // Coerce inputs to strings.

          a = a + "", b = b + ""; // Interpolate pairs of numbers in a & b.

          while ((am = reA.exec(a)) && (bm = reB.exec(b))) {
            if ((bs = bm.index) > bi) {
              // a string precedes the next number in b
              bs = b.slice(bi, bs);
              if (s[i]) s[i] += bs; // coalesce with previous string
              else s[++i] = bs;
            }

            if ((am = am[0]) === (bm = bm[0])) {
              // numbers in a & b match
              if (s[i]) s[i] += bm; // coalesce with previous string
              else s[++i] = bm;
            } else {
              // interpolate non-matching numbers
              s[++i] = null;
              q.push({
                i: i,
                x: d3_interpolateNumber(am, bm)
              });
            }

            bi = reB.lastIndex;
          } // Add remains of b.


          if (bi < b.length) {
            bs = b.slice(bi);
            if (s[i]) s[i] += bs; // coalesce with previous string
            else s[++i] = bs;
          } // Special optimization for only a single match.
          // Otherwise, interpolate each of the numbers and rejoin the string.


          return s.length < 2 ? q[0] ? one(q[0].x) : zero(b) : (b = q.length, function (t) {
            for (var i = 0, o; i < b; ++i) {
              s[(o = q[i]).i] = o.x(t);
            }

            return s.join("");
          });
        }

        function interpolate$1 (a, b) {
          var t = _typeof(b),
              c;

          return b == null || t === "boolean" ? constant$1(b) : (t === "number" ? d3_interpolateNumber : t === "string" ? (c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString : b instanceof color ? d3_interpolateRgb : b instanceof Date ? date : isNumberArray(b) ? numberArray : Array.isArray(b) ? genericArray : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object : d3_interpolateNumber)(a, b);
        }

        function interpolateRound (a, b) {
          return a = +a, b = +b, function (t) {
            return Math.round(a * (1 - t) + b * t);
          };
        }

        var degrees = 180 / Math.PI;
        var identity$3 = {
          translateX: 0,
          translateY: 0,
          rotate: 0,
          skewX: 0,
          scaleX: 1,
          scaleY: 1
        };
        function decompose (a, b, c, d, e, f) {
          var scaleX, scaleY, skewX;
          if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
          if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
          if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
          if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
          return {
            translateX: e,
            translateY: f,
            rotate: Math.atan2(b, a) * degrees,
            skewX: Math.atan(skewX) * degrees,
            scaleX: scaleX,
            scaleY: scaleY
          };
        }

        var svgNode;
        /* eslint-disable no-undef */

        function parseCss(value) {
          var m = new (typeof DOMMatrix === "function" ? DOMMatrix : WebKitCSSMatrix)(value + "");
          return m.isIdentity ? identity$3 : decompose(m.a, m.b, m.c, m.d, m.e, m.f);
        }
        function parseSvg(value) {
          if (value == null) return identity$3;
          if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
          svgNode.setAttribute("transform", value);
          if (!(value = svgNode.transform.baseVal.consolidate())) return identity$3;
          value = value.matrix;
          return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
        }

        function interpolateTransform(parse, pxComma, pxParen, degParen) {
          function pop(s) {
            return s.length ? s.pop() + " " : "";
          }

          function translate(xa, ya, xb, yb, s, q) {
            if (xa !== xb || ya !== yb) {
              var i = s.push("translate(", null, pxComma, null, pxParen);
              q.push({
                i: i - 4,
                x: d3_interpolateNumber(xa, xb)
              }, {
                i: i - 2,
                x: d3_interpolateNumber(ya, yb)
              });
            } else if (xb || yb) {
              s.push("translate(" + xb + pxComma + yb + pxParen);
            }
          }

          function rotate(a, b, s, q) {
            if (a !== b) {
              if (a - b > 180) b += 360;else if (b - a > 180) a += 360; // shortest path

              q.push({
                i: s.push(pop(s) + "rotate(", null, degParen) - 2,
                x: d3_interpolateNumber(a, b)
              });
            } else if (b) {
              s.push(pop(s) + "rotate(" + b + degParen);
            }
          }

          function skewX(a, b, s, q) {
            if (a !== b) {
              q.push({
                i: s.push(pop(s) + "skewX(", null, degParen) - 2,
                x: d3_interpolateNumber(a, b)
              });
            } else if (b) {
              s.push(pop(s) + "skewX(" + b + degParen);
            }
          }

          function scale(xa, ya, xb, yb, s, q) {
            if (xa !== xb || ya !== yb) {
              var i = s.push(pop(s) + "scale(", null, ",", null, ")");
              q.push({
                i: i - 4,
                x: d3_interpolateNumber(xa, xb)
              }, {
                i: i - 2,
                x: d3_interpolateNumber(ya, yb)
              });
            } else if (xb !== 1 || yb !== 1) {
              s.push(pop(s) + "scale(" + xb + "," + yb + ")");
            }
          }

          return function (a, b) {
            var s = [],
                // string constants and placeholders
            q = []; // number interpolators

            a = parse(a), b = parse(b);
            translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
            rotate(a.rotate, b.rotate, s, q);
            skewX(a.skewX, b.skewX, s, q);
            scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
            a = b = null; // gc

            return function (t) {
              var i = -1,
                  n = q.length,
                  o;

              while (++i < n) {
                s[(o = q[i]).i] = o.x(t);
              }

              return s.join("");
            };
          };
        }

        var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
        var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");

        var epsilon2 = 1e-12;

        function cosh(x) {
          return ((x = Math.exp(x)) + 1 / x) / 2;
        }

        function sinh(x) {
          return ((x = Math.exp(x)) - 1 / x) / 2;
        }

        function tanh(x) {
          return ((x = Math.exp(2 * x)) - 1) / (x + 1);
        }

        var interpolateZoom = (function zoomRho(rho, rho2, rho4) {
          // p0 = [ux0, uy0, w0]
          // p1 = [ux1, uy1, w1]
          function zoom(p0, p1) {
            var ux0 = p0[0],
                uy0 = p0[1],
                w0 = p0[2],
                ux1 = p1[0],
                uy1 = p1[1],
                w1 = p1[2],
                dx = ux1 - ux0,
                dy = uy1 - uy0,
                d2 = dx * dx + dy * dy,
                i,
                S; // Special case for u0 ≅ u1.

            if (d2 < epsilon2) {
              S = Math.log(w1 / w0) / rho;

              i = function i(t) {
                return [ux0 + t * dx, uy0 + t * dy, w0 * Math.exp(rho * t * S)];
              };
            } // General case.
            else {
                var d1 = Math.sqrt(d2),
                    b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
                    b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
                    r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
                    r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
                S = (r1 - r0) / rho;

                i = function i(t) {
                  var s = t * S,
                      coshr0 = cosh(r0),
                      u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
                  return [ux0 + u * dx, uy0 + u * dy, w0 * coshr0 / cosh(rho * s + r0)];
                };
              }

            i.duration = S * 1000 * rho / Math.SQRT2;
            return i;
          }

          zoom.rho = function (_) {
            var _1 = Math.max(1e-3, +_),
                _2 = _1 * _1,
                _4 = _2 * _2;

            return zoomRho(_1, _2, _4);
          };

          return zoom;
        })(Math.SQRT2, 2, 4);

        function d3_quantize (interpolator, n) {
          var samples = new Array(n);

          for (var i = 0; i < n; ++i) {
            samples[i] = interpolator(i / (n - 1));
          }

          return samples;
        }

        // `Function.prototype.bind` method
        // https://tc39.es/ecma262/#sec-function.prototype.bind
        _export({ target: 'Function', proto: true }, {
          bind: functionBind
        });

        var frame = 0,
            // is an animation frame pending?
        timeout = 0,
            // is a timeout pending?
        interval = 0,
            // are any timers active?
        pokeDelay = 1000,
            // how frequently we check for clock skew
        taskHead,
            taskTail,
            clockLast = 0,
            clockNow = 0,
            clockSkew = 0,
            clock = (typeof performance === "undefined" ? "undefined" : _typeof(performance)) === "object" && performance.now ? performance : Date,
            setFrame = (typeof window === "undefined" ? "undefined" : _typeof(window)) === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function (f) {
          setTimeout(f, 17);
        };
        function now$1() {
          return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
        }

        function clearNow() {
          clockNow = 0;
        }

        function Timer() {
          this._call = this._time = this._next = null;
        }
        Timer.prototype = timer.prototype = {
          constructor: Timer,
          restart: function restart(callback, delay, time) {
            if (typeof callback !== "function") throw new TypeError("callback is not a function");
            time = (time == null ? now$1() : +time) + (delay == null ? 0 : +delay);

            if (!this._next && taskTail !== this) {
              if (taskTail) taskTail._next = this;else taskHead = this;
              taskTail = this;
            }

            this._call = callback;
            this._time = time;
            sleep();
          },
          stop: function stop() {
            if (this._call) {
              this._call = null;
              this._time = Infinity;
              sleep();
            }
          }
        };
        function timer(callback, delay, time) {
          var t = new Timer();
          t.restart(callback, delay, time);
          return t;
        }
        function timerFlush() {
          now$1(); // Get the current time, if not already set.

          ++frame; // Pretend we’ve set an alarm, if we haven’t already.

          var t = taskHead,
              e;

          while (t) {
            if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
            t = t._next;
          }

          --frame;
        }

        function wake() {
          clockNow = (clockLast = clock.now()) + clockSkew;
          frame = timeout = 0;

          try {
            timerFlush();
          } finally {
            frame = 0;
            nap();
            clockNow = 0;
          }
        }

        function poke() {
          var now = clock.now(),
              delay = now - clockLast;
          if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
        }

        function nap() {
          var t0,
              t1 = taskHead,
              t2,
              time = Infinity;

          while (t1) {
            if (t1._call) {
              if (time > t1._time) time = t1._time;
              t0 = t1, t1 = t1._next;
            } else {
              t2 = t1._next, t1._next = null;
              t1 = t0 ? t0._next = t2 : taskHead = t2;
            }
          }

          taskTail = t0;
          sleep(time);
        }

        function sleep(time) {
          if (frame) return; // Soonest alarm already set, or will be.

          if (timeout) timeout = clearTimeout(timeout);
          var delay = time - clockNow; // Strictly less than if we recomputed clockNow.

          if (delay > 24) {
            if (time < Infinity) timeout = setTimeout(wake, time - clock.now() - clockSkew);
            if (interval) interval = clearInterval(interval);
          } else {
            if (!interval) clockLast = clock.now(), interval = setInterval(poke, pokeDelay);
            frame = 1, setFrame(wake);
          }
        }

        function d3_timeout (callback, delay, time) {
          var t = new Timer();
          delay = delay == null ? 0 : +delay;
          t.restart(function (elapsed) {
            t.stop();
            callback(elapsed + delay);
          }, delay, time);
          return t;
        }

        var emptyOn = dispatch$8("start", "end", "cancel", "interrupt");
        var emptyTween = [];
        var CREATED = 0;
        var SCHEDULED = 1;
        var STARTING = 2;
        var STARTED = 3;
        var RUNNING = 4;
        var ENDING = 5;
        var ENDED = 6;
        function schedule (node, name, id, index, group, timing) {
          var schedules = node.__transition;
          if (!schedules) node.__transition = {};else if (id in schedules) return;
          create$2(node, id, {
            name: name,
            index: index,
            // For context during callback.
            group: group,
            // For context during callback.
            on: emptyOn,
            tween: emptyTween,
            time: timing.time,
            delay: timing.delay,
            duration: timing.duration,
            ease: timing.ease,
            timer: null,
            state: CREATED
          });
        }
        function init(node, id) {
          var schedule = get$1(node, id);
          if (schedule.state > CREATED) throw new Error("too late; already scheduled");
          return schedule;
        }
        function set(node, id) {
          var schedule = get$1(node, id);
          if (schedule.state > STARTED) throw new Error("too late; already running");
          return schedule;
        }
        function get$1(node, id) {
          var schedule = node.__transition;
          if (!schedule || !(schedule = schedule[id])) throw new Error("transition not found");
          return schedule;
        }

        function create$2(node, id, self) {
          var schedules = node.__transition,
              tween; // Initialize the self timer when the transition is created.
          // Note the actual delay is not known until the first callback!

          schedules[id] = self;
          self.timer = timer(schedule, 0, self.time);

          function schedule(elapsed) {
            self.state = SCHEDULED;
            self.timer.restart(start, self.delay, self.time); // If the elapsed delay is less than our first sleep, start immediately.

            if (self.delay <= elapsed) start(elapsed - self.delay);
          }

          function start(elapsed) {
            var i, j, n, o; // If the state is not SCHEDULED, then we previously errored on start.

            if (self.state !== SCHEDULED) return stop();

            for (i in schedules) {
              o = schedules[i];
              if (o.name !== self.name) continue; // While this element already has a starting transition during this frame,
              // defer starting an interrupting transition until that transition has a
              // chance to tick (and possibly end); see d3/d3-transition#54!

              if (o.state === STARTED) return d3_timeout(start); // Interrupt the active transition, if any.

              if (o.state === RUNNING) {
                o.state = ENDED;
                o.timer.stop();
                o.on.call("interrupt", node, node.__data__, o.index, o.group);
                delete schedules[i];
              } // Cancel any pre-empted transitions.
              else if (+i < id) {
                  o.state = ENDED;
                  o.timer.stop();
                  o.on.call("cancel", node, node.__data__, o.index, o.group);
                  delete schedules[i];
                }
            } // Defer the first tick to end of the current frame; see d3/d3#1576.
            // Note the transition may be canceled after start and before the first tick!
            // Note this must be scheduled before the start event; see d3/d3-transition#16!
            // Assuming this is successful, subsequent callbacks go straight to tick.


            d3_timeout(function () {
              if (self.state === STARTED) {
                self.state = RUNNING;
                self.timer.restart(tick, self.delay, self.time);
                tick(elapsed);
              }
            }); // Dispatch the start event.
            // Note this must be done before the tween are initialized.

            self.state = STARTING;
            self.on.call("start", node, node.__data__, self.index, self.group);
            if (self.state !== STARTING) return; // interrupted

            self.state = STARTED; // Initialize the tween, deleting null tween.

            tween = new Array(n = self.tween.length);

            for (i = 0, j = -1; i < n; ++i) {
              if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
                tween[++j] = o;
              }
            }

            tween.length = j + 1;
          }

          function tick(elapsed) {
            var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
                i = -1,
                n = tween.length;

            while (++i < n) {
              tween[i].call(node, t);
            } // Dispatch the end event.


            if (self.state === ENDING) {
              self.on.call("end", node, node.__data__, self.index, self.group);
              stop();
            }
          }

          function stop() {
            self.state = ENDED;
            self.timer.stop();
            delete schedules[id];

            for (var i in schedules) {
              return;
            } // eslint-disable-line no-unused-vars


            delete node.__transition;
          }
        }

        function interrupt (node, name) {
          var schedules = node.__transition,
              schedule,
              active,
              empty = true,
              i;
          if (!schedules) return;
          name = name == null ? null : name + "";

          for (i in schedules) {
            if ((schedule = schedules[i]).name !== name) {
              empty = false;
              continue;
            }

            active = schedule.state > STARTING && schedule.state < ENDING;
            schedule.state = ENDED;
            schedule.timer.stop();
            schedule.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule.index, schedule.group);
            delete schedules[i];
          }

          if (empty) delete node.__transition;
        }

        function selection_interrupt (name) {
          return this.each(function () {
            interrupt(this, name);
          });
        }

        function tweenRemove(id, name) {
          var tween0, tween1;
          return function () {
            var schedule = set(this, id),
                tween = schedule.tween; // If this node shared tween with the previous node,
            // just assign the updated shared tween and we’re done!
            // Otherwise, copy-on-write.

            if (tween !== tween0) {
              tween1 = tween0 = tween;

              for (var i = 0, n = tween1.length; i < n; ++i) {
                if (tween1[i].name === name) {
                  tween1 = tween1.slice();
                  tween1.splice(i, 1);
                  break;
                }
              }
            }

            schedule.tween = tween1;
          };
        }

        function tweenFunction(id, name, value) {
          var tween0, tween1;
          if (typeof value !== "function") throw new Error();
          return function () {
            var schedule = set(this, id),
                tween = schedule.tween; // If this node shared tween with the previous node,
            // just assign the updated shared tween and we’re done!
            // Otherwise, copy-on-write.

            if (tween !== tween0) {
              tween1 = (tween0 = tween).slice();

              for (var t = {
                name: name,
                value: value
              }, i = 0, n = tween1.length; i < n; ++i) {
                if (tween1[i].name === name) {
                  tween1[i] = t;
                  break;
                }
              }

              if (i === n) tween1.push(t);
            }

            schedule.tween = tween1;
          };
        }

        function transition_tween (name, value) {
          var id = this._id;
          name += "";

          if (arguments.length < 2) {
            var tween = get$1(this.node(), id).tween;

            for (var i = 0, n = tween.length, t; i < n; ++i) {
              if ((t = tween[i]).name === name) {
                return t.value;
              }
            }

            return null;
          }

          return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
        }
        function tweenValue(transition, name, value) {
          var id = transition._id;
          transition.each(function () {
            var schedule = set(this, id);
            (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
          });
          return function (node) {
            return get$1(node, id).value[name];
          };
        }

        function interpolate (a, b) {
          var c;
          return (typeof b === "number" ? d3_interpolateNumber : b instanceof color ? d3_interpolateRgb : (c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString)(a, b);
        }

        function attrRemove(name) {
          return function () {
            this.removeAttribute(name);
          };
        }

        function attrRemoveNS(fullname) {
          return function () {
            this.removeAttributeNS(fullname.space, fullname.local);
          };
        }

        function attrConstant(name, interpolate, value1) {
          var string00,
              string1 = value1 + "",
              interpolate0;
          return function () {
            var string0 = this.getAttribute(name);
            return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
          };
        }

        function attrConstantNS(fullname, interpolate, value1) {
          var string00,
              string1 = value1 + "",
              interpolate0;
          return function () {
            var string0 = this.getAttributeNS(fullname.space, fullname.local);
            return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
          };
        }

        function attrFunction(name, interpolate, value) {
          var string00, string10, interpolate0;
          return function () {
            var string0,
                value1 = value(this),
                string1;
            if (value1 == null) return void this.removeAttribute(name);
            string0 = this.getAttribute(name);
            string1 = value1 + "";
            return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
          };
        }

        function attrFunctionNS(fullname, interpolate, value) {
          var string00, string10, interpolate0;
          return function () {
            var string0,
                value1 = value(this),
                string1;
            if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
            string0 = this.getAttributeNS(fullname.space, fullname.local);
            string1 = value1 + "";
            return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
          };
        }

        function transition_attr (name, value) {
          var fullname = namespace(name),
              i = fullname === "transform" ? interpolateTransformSvg : interpolate;
          return this.attrTween(name, typeof value === "function" ? (fullname.local ? attrFunctionNS : attrFunction)(fullname, i, tweenValue(this, "attr." + name, value)) : value == null ? (fullname.local ? attrRemoveNS : attrRemove)(fullname) : (fullname.local ? attrConstantNS : attrConstant)(fullname, i, value));
        }

        function attrInterpolate(name, i) {
          return function (t) {
            this.setAttribute(name, i.call(this, t));
          };
        }

        function attrInterpolateNS(fullname, i) {
          return function (t) {
            this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
          };
        }

        function attrTweenNS(fullname, value) {
          var t0, i0;

          function tween() {
            var i = value.apply(this, arguments);
            if (i !== i0) t0 = (i0 = i) && attrInterpolateNS(fullname, i);
            return t0;
          }

          tween._value = value;
          return tween;
        }

        function attrTween(name, value) {
          var t0, i0;

          function tween() {
            var i = value.apply(this, arguments);
            if (i !== i0) t0 = (i0 = i) && attrInterpolate(name, i);
            return t0;
          }

          tween._value = value;
          return tween;
        }

        function transition_attrTween (name, value) {
          var key = "attr." + name;
          if (arguments.length < 2) return (key = this.tween(key)) && key._value;
          if (value == null) return this.tween(key, null);
          if (typeof value !== "function") throw new Error();
          var fullname = namespace(name);
          return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
        }

        function delayFunction(id, value) {
          return function () {
            init(this, id).delay = +value.apply(this, arguments);
          };
        }

        function delayConstant(id, value) {
          return value = +value, function () {
            init(this, id).delay = value;
          };
        }

        function transition_delay (value) {
          var id = this._id;
          return arguments.length ? this.each((typeof value === "function" ? delayFunction : delayConstant)(id, value)) : get$1(this.node(), id).delay;
        }

        function durationFunction(id, value) {
          return function () {
            set(this, id).duration = +value.apply(this, arguments);
          };
        }

        function durationConstant(id, value) {
          return value = +value, function () {
            set(this, id).duration = value;
          };
        }

        function transition_duration (value) {
          var id = this._id;
          return arguments.length ? this.each((typeof value === "function" ? durationFunction : durationConstant)(id, value)) : get$1(this.node(), id).duration;
        }

        function easeConstant(id, value) {
          if (typeof value !== "function") throw new Error();
          return function () {
            set(this, id).ease = value;
          };
        }

        function transition_ease (value) {
          var id = this._id;
          return arguments.length ? this.each(easeConstant(id, value)) : get$1(this.node(), id).ease;
        }

        function easeVarying(id, value) {
          return function () {
            var v = value.apply(this, arguments);
            if (typeof v !== "function") throw new Error();
            set(this, id).ease = v;
          };
        }

        function transition_easeVarying (value) {
          if (typeof value !== "function") throw new Error();
          return this.each(easeVarying(this._id, value));
        }

        function transition_filter (match) {
          if (typeof match !== "function") match = matcher(match);

          for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
            for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
              if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
                subgroup.push(node);
              }
            }
          }

          return new Transition(subgroups, this._parents, this._name, this._id);
        }

        function transition_merge (transition) {
          if (transition._id !== this._id) throw new Error();

          for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
            for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
              if (node = group0[i] || group1[i]) {
                merge[i] = node;
              }
            }
          }

          for (; j < m0; ++j) {
            merges[j] = groups0[j];
          }

          return new Transition(merges, this._parents, this._name, this._id);
        }

        function start(name) {
          return (name + "").trim().split(/^|\s+/).every(function (t) {
            var i = t.indexOf(".");
            if (i >= 0) t = t.slice(0, i);
            return !t || t === "start";
          });
        }

        function onFunction(id, name, listener) {
          var on0,
              on1,
              sit = start(name) ? init : set;
          return function () {
            var schedule = sit(this, id),
                on = schedule.on; // If this node shared a dispatch with the previous node,
            // just assign the updated shared dispatch and we’re done!
            // Otherwise, copy-on-write.

            if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
            schedule.on = on1;
          };
        }

        function transition_on (name, listener) {
          var id = this._id;
          return arguments.length < 2 ? get$1(this.node(), id).on.on(name) : this.each(onFunction(id, name, listener));
        }

        function removeFunction(id) {
          return function () {
            var parent = this.parentNode;

            for (var i in this.__transition) {
              if (+i !== id) return;
            }

            if (parent) parent.removeChild(this);
          };
        }

        function transition_remove () {
          return this.on("end.remove", removeFunction(this._id));
        }

        function transition_select (select) {
          var name = this._name,
              id = this._id;
          if (typeof select !== "function") select = selector(select);

          for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
            for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
              if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
                if ("__data__" in node) subnode.__data__ = node.__data__;
                subgroup[i] = subnode;
                schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
              }
            }
          }

          return new Transition(subgroups, this._parents, name, id);
        }

        function transition_selectAll (select) {
          var name = this._name,
              id = this._id;
          if (typeof select !== "function") select = selectorAll(select);

          for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
            for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
              if (node = group[i]) {
                for (var children = select.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
                  if (child = children[k]) {
                    schedule(child, name, id, k, children, inherit);
                  }
                }

                subgroups.push(children);
                parents.push(node);
              }
            }
          }

          return new Transition(subgroups, parents, name, id);
        }

        var Selection = selection.prototype.constructor;
        function transition_selection () {
          return new Selection(this._groups, this._parents);
        }

        function styleNull(name, interpolate) {
          var string00, string10, interpolate0;
          return function () {
            var string0 = styleValue(this, name),
                string1 = (this.style.removeProperty(name), styleValue(this, name));
            return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : interpolate0 = interpolate(string00 = string0, string10 = string1);
          };
        }

        function styleRemove(name) {
          return function () {
            this.style.removeProperty(name);
          };
        }

        function styleConstant(name, interpolate, value1) {
          var string00,
              string1 = value1 + "",
              interpolate0;
          return function () {
            var string0 = styleValue(this, name);
            return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
          };
        }

        function styleFunction(name, interpolate, value) {
          var string00, string10, interpolate0;
          return function () {
            var string0 = styleValue(this, name),
                value1 = value(this),
                string1 = value1 + "";
            if (value1 == null) string1 = value1 = (this.style.removeProperty(name), styleValue(this, name));
            return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
          };
        }

        function styleMaybeRemove(id, name) {
          var on0,
              on1,
              listener0,
              key = "style." + name,
              event = "end." + key,
              remove;
          return function () {
            var schedule = set(this, id),
                on = schedule.on,
                listener = schedule.value[key] == null ? remove || (remove = styleRemove(name)) : undefined; // If this node shared a dispatch with the previous node,
            // just assign the updated shared dispatch and we’re done!
            // Otherwise, copy-on-write.

            if (on !== on0 || listener0 !== listener) (on1 = (on0 = on).copy()).on(event, listener0 = listener);
            schedule.on = on1;
          };
        }

        function transition_style (name, value, priority) {
          var i = (name += "") === "transform" ? interpolateTransformCss : interpolate;
          return value == null ? this.styleTween(name, styleNull(name, i)).on("end.style." + name, styleRemove(name)) : typeof value === "function" ? this.styleTween(name, styleFunction(name, i, tweenValue(this, "style." + name, value))).each(styleMaybeRemove(this._id, name)) : this.styleTween(name, styleConstant(name, i, value), priority).on("end.style." + name, null);
        }

        function styleInterpolate(name, i, priority) {
          return function (t) {
            this.style.setProperty(name, i.call(this, t), priority);
          };
        }

        function styleTween(name, value, priority) {
          var t, i0;

          function tween() {
            var i = value.apply(this, arguments);
            if (i !== i0) t = (i0 = i) && styleInterpolate(name, i, priority);
            return t;
          }

          tween._value = value;
          return tween;
        }

        function transition_styleTween (name, value, priority) {
          var key = "style." + (name += "");
          if (arguments.length < 2) return (key = this.tween(key)) && key._value;
          if (value == null) return this.tween(key, null);
          if (typeof value !== "function") throw new Error();
          return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
        }

        function textConstant(value) {
          return function () {
            this.textContent = value;
          };
        }

        function textFunction(value) {
          return function () {
            var value1 = value(this);
            this.textContent = value1 == null ? "" : value1;
          };
        }

        function transition_text (value) {
          return this.tween("text", typeof value === "function" ? textFunction(tweenValue(this, "text", value)) : textConstant(value == null ? "" : value + ""));
        }

        function textInterpolate(i) {
          return function (t) {
            this.textContent = i.call(this, t);
          };
        }

        function textTween(value) {
          var t0, i0;

          function tween() {
            var i = value.apply(this, arguments);
            if (i !== i0) t0 = (i0 = i) && textInterpolate(i);
            return t0;
          }

          tween._value = value;
          return tween;
        }

        function transition_textTween (value) {
          var key = "text";
          if (arguments.length < 1) return (key = this.tween(key)) && key._value;
          if (value == null) return this.tween(key, null);
          if (typeof value !== "function") throw new Error();
          return this.tween(key, textTween(value));
        }

        function transition_transition () {
          var name = this._name,
              id0 = this._id,
              id1 = newId();

          for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
            for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
              if (node = group[i]) {
                var inherit = get$1(node, id0);
                schedule(node, name, id1, i, group, {
                  time: inherit.time + inherit.delay + inherit.duration,
                  delay: 0,
                  duration: inherit.duration,
                  ease: inherit.ease
                });
              }
            }
          }

          return new Transition(groups, this._parents, name, id1);
        }

        function transition_end () {
          var on0,
              on1,
              that = this,
              id = that._id,
              size = that.size();
          return new Promise(function (resolve, reject) {
            var cancel = {
              value: reject
            },
                end = {
              value: function value() {
                if (--size === 0) resolve();
              }
            };
            that.each(function () {
              var schedule = set(this, id),
                  on = schedule.on; // If this node shared a dispatch with the previous node,
              // just assign the updated shared dispatch and we’re done!
              // Otherwise, copy-on-write.

              if (on !== on0) {
                on1 = (on0 = on).copy();

                on1._.cancel.push(cancel);

                on1._.interrupt.push(cancel);

                on1._.end.push(end);
              }

              schedule.on = on1;
            }); // The selection was empty, resolve end immediately

            if (size === 0) resolve();
          });
        }

        var id = 0;
        function Transition(groups, parents, name, id) {
          this._groups = groups;
          this._parents = parents;
          this._name = name;
          this._id = id;
        }
        function newId() {
          return ++id;
        }
        var selection_prototype = selection.prototype;
        Transition.prototype = _defineProperty({
          constructor: Transition,
          select: transition_select,
          selectAll: transition_selectAll,
          filter: transition_filter,
          merge: transition_merge,
          selection: transition_selection,
          transition: transition_transition,
          call: selection_prototype.call,
          nodes: selection_prototype.nodes,
          node: selection_prototype.node,
          size: selection_prototype.size,
          empty: selection_prototype.empty,
          each: selection_prototype.each,
          on: transition_on,
          attr: transition_attr,
          attrTween: transition_attrTween,
          style: transition_style,
          styleTween: transition_styleTween,
          text: transition_text,
          textTween: transition_textTween,
          remove: transition_remove,
          tween: transition_tween,
          delay: transition_delay,
          duration: transition_duration,
          ease: transition_ease,
          easeVarying: transition_easeVarying,
          end: transition_end
        }, Symbol.iterator, selection_prototype[Symbol.iterator]);

        var linear$1 = function linear(t) {
          return +t;
        };

        function cubicInOut(t) {
          return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
        }

        var defaultTiming = {
          time: null,
          // Set on use.
          delay: 0,
          duration: 250,
          ease: cubicInOut
        };

        function inherit(node, id) {
          var timing;

          while (!(timing = node.__transition) || !(timing = timing[id])) {
            if (!(node = node.parentNode)) {
              throw new Error("transition ".concat(id, " not found"));
            }
          }

          return timing;
        }

        function selection_transition (name) {
          var id, timing;

          if (name instanceof Transition) {
            id = name._id, name = name._name;
          } else {
            id = newId(), (timing = defaultTiming).time = now$1(), name = name == null ? null : name + "";
          }

          for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
            for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
              if (node = group[i]) {
                schedule(node, name, id, i, group, timing || inherit(node, id));
              }
            }
          }

          return new Transition(groups, this._parents, name, id);
        }

        selection.prototype.interrupt = selection_interrupt;
        selection.prototype.transition = selection_transition;

        var constant = (function (x) {
          return function () {
            return x;
          };
        });

        function ZoomEvent(type, _ref) {
          var sourceEvent = _ref.sourceEvent,
              target = _ref.target,
              transform = _ref.transform,
              dispatch = _ref.dispatch;
          Object.defineProperties(this, {
            type: {
              value: type,
              enumerable: true,
              configurable: true
            },
            sourceEvent: {
              value: sourceEvent,
              enumerable: true,
              configurable: true
            },
            target: {
              value: target,
              enumerable: true,
              configurable: true
            },
            transform: {
              value: transform,
              enumerable: true,
              configurable: true
            },
            _: {
              value: dispatch
            }
          });
        }

        function Transform(k, x, y) {
          this.k = k;
          this.x = x;
          this.y = y;
        }
        Transform.prototype = {
          constructor: Transform,
          scale: function scale(k) {
            return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
          },
          translate: function translate(x, y) {
            return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
          },
          apply: function apply(point) {
            return [point[0] * this.k + this.x, point[1] * this.k + this.y];
          },
          applyX: function applyX(x) {
            return x * this.k + this.x;
          },
          applyY: function applyY(y) {
            return y * this.k + this.y;
          },
          invert: function invert(location) {
            return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
          },
          invertX: function invertX(x) {
            return (x - this.x) / this.k;
          },
          invertY: function invertY(y) {
            return (y - this.y) / this.k;
          },
          rescaleX: function rescaleX(x) {
            return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
          },
          rescaleY: function rescaleY(y) {
            return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
          },
          toString: function toString() {
            return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
          }
        };
        var identity$2 = new Transform(1, 0, 0);

        function nopropagation(event) {
          event.stopImmediatePropagation();
        }
        function noevent (event) {
          event.preventDefault();
          event.stopImmediatePropagation();
        }

        // except for pinch-to-zoom, which is sent as a wheel+ctrlKey event

        function defaultFilter$1(event) {
          return (!event.ctrlKey || event.type === 'wheel') && !event.button;
        }

        function defaultExtent$1() {
          var e = this;

          if (e instanceof SVGElement) {
            e = e.ownerSVGElement || e;

            if (e.hasAttribute("viewBox")) {
              e = e.viewBox.baseVal;
              return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
            }

            return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
          }

          return [[0, 0], [e.clientWidth, e.clientHeight]];
        }

        function defaultTransform() {
          return this.__zoom || identity$2;
        }

        function defaultWheelDelta$1(event) {
          return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002) * (event.ctrlKey ? 10 : 1);
        }

        function defaultTouchable() {
          return navigator.maxTouchPoints || "ontouchstart" in this;
        }

        function defaultConstrain$1(transform, extent, translateExtent) {
          var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
              dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
              dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
              dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
          return transform.translate(dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1), dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1));
        }

        function d3_zoom () {
          var filter = defaultFilter$1,
              extent = defaultExtent$1,
              constrain = defaultConstrain$1,
              wheelDelta = defaultWheelDelta$1,
              touchable = defaultTouchable,
              scaleExtent = [0, Infinity],
              translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
              duration = 250,
              interpolate = interpolateZoom,
              listeners = dispatch$8("start", "zoom", "end"),
              touchstarting,
              touchfirst,
              touchending,
              touchDelay = 500,
              wheelDelay = 150,
              clickDistance2 = 0,
              tapDistance = 10;

          function zoom(selection) {
            selection.property("__zoom", defaultTransform).on("wheel.zoom", wheeled).on("mousedown.zoom", mousedowned).on("dblclick.zoom", dblclicked).filter(touchable).on("touchstart.zoom", touchstarted).on("touchmove.zoom", touchmoved).on("touchend.zoom touchcancel.zoom", touchended).style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
          }

          zoom.transform = function (collection, transform, point, event) {
            var selection = collection.selection ? collection.selection() : collection;
            selection.property("__zoom", defaultTransform);

            if (collection !== selection) {
              schedule(collection, transform, point, event);
            } else {
              selection.interrupt().each(function () {
                gesture(this, arguments).event(event).start().zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform).end();
              });
            }
          };

          zoom.scaleBy = function (selection, k, p, event) {
            zoom.scaleTo(selection, function () {
              var k0 = this.__zoom.k,
                  k1 = typeof k === "function" ? k.apply(this, arguments) : k;
              return k0 * k1;
            }, p, event);
          };

          zoom.scaleTo = function (selection, k, p, event) {
            zoom.transform(selection, function () {
              var e = extent.apply(this, arguments),
                  t0 = this.__zoom,
                  p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p,
                  p1 = t0.invert(p0),
                  k1 = typeof k === "function" ? k.apply(this, arguments) : k;
              return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
            }, p, event);
          };

          zoom.translateBy = function (selection, x, y, event) {
            zoom.transform(selection, function () {
              return constrain(this.__zoom.translate(typeof x === "function" ? x.apply(this, arguments) : x, typeof y === "function" ? y.apply(this, arguments) : y), extent.apply(this, arguments), translateExtent);
            }, null, event);
          };

          zoom.translateTo = function (selection, x, y, p, event) {
            zoom.transform(selection, function () {
              var e = extent.apply(this, arguments),
                  t = this.__zoom,
                  p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p;
              return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(typeof x === "function" ? -x.apply(this, arguments) : -x, typeof y === "function" ? -y.apply(this, arguments) : -y), e, translateExtent);
            }, p, event);
          };

          function scale(transform, k) {
            k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
            return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
          }

          function translate(transform, p0, p1) {
            var x = p0[0] - p1[0] * transform.k,
                y = p0[1] - p1[1] * transform.k;
            return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
          }

          function centroid(extent) {
            return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
          }

          function schedule(transition, transform, point, event) {
            transition.on("start.zoom", function () {
              gesture(this, arguments).event(event).start();
            }).on("interrupt.zoom end.zoom", function () {
              gesture(this, arguments).event(event).end();
            }).tween("zoom", function () {
              var that = this,
                  args = arguments,
                  g = gesture(that, args).event(event),
                  e = extent.apply(that, args),
                  p = point == null ? centroid(e) : typeof point === "function" ? point.apply(that, args) : point,
                  w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
                  a = that.__zoom,
                  b = typeof transform === "function" ? transform.apply(that, args) : transform,
                  i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
              return function (t) {
                if (t === 1) t = b; // Avoid rounding error on end.
                else {
                    var l = i(t),
                        k = w / l[2];
                    t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
                  }
                g.zoom(null, t);
              };
            });
          }

          function gesture(that, args, clean) {
            return !clean && that.__zooming || new Gesture(that, args);
          }

          function Gesture(that, args) {
            this.that = that;
            this.args = args;
            this.active = 0;
            this.sourceEvent = null;
            this.extent = extent.apply(that, args);
            this.taps = 0;
          }

          Gesture.prototype = {
            event: function event(_event) {
              if (_event) this.sourceEvent = _event;
              return this;
            },
            start: function start() {
              if (++this.active === 1) {
                this.that.__zooming = this;
                this.emit("start");
              }

              return this;
            },
            zoom: function zoom(key, transform) {
              if (this.mouse && key !== "mouse") this.mouse[1] = transform.invert(this.mouse[0]);
              if (this.touch0 && key !== "touch") this.touch0[1] = transform.invert(this.touch0[0]);
              if (this.touch1 && key !== "touch") this.touch1[1] = transform.invert(this.touch1[0]);
              this.that.__zoom = transform;
              this.emit("zoom");
              return this;
            },
            end: function end() {
              if (--this.active === 0) {
                delete this.that.__zooming;
                this.emit("end");
              }

              return this;
            },
            emit: function emit(type) {
              var d = select(this.that).datum();
              listeners.call(type, this.that, new ZoomEvent(type, {
                sourceEvent: this.sourceEvent,
                target: zoom,
                type: type,
                transform: this.that.__zoom,
                dispatch: listeners
              }), d);
            }
          };

          function wheeled(event) {
            for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
              args[_key - 1] = arguments[_key];
            }

            if (!filter.apply(this, arguments)) return;
            var g = gesture(this, args).event(event),
                t = this.__zoom,
                k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
                p = pointer(event); // If the mouse is in the same location as before, reuse it.
            // If there were recent wheel events, reset the wheel idle timeout.

            if (g.wheel) {
              if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
                g.mouse[1] = t.invert(g.mouse[0] = p);
              }

              clearTimeout(g.wheel);
            } // If this wheel event won’t trigger a transform change, ignore it.
            else if (t.k === k) return; // Otherwise, capture the mouse point and location at the start.
              else {
                  g.mouse = [p, t.invert(p)];
                  interrupt(this);
                  g.start();
                }

            noevent(event);
            g.wheel = setTimeout(wheelidled, wheelDelay);
            g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));

            function wheelidled() {
              g.wheel = null;
              g.end();
            }
          }

          function mousedowned(event) {
            for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
              args[_key2 - 1] = arguments[_key2];
            }

            if (touchending || !filter.apply(this, arguments)) return;
            var g = gesture(this, args, true).event(event),
                v = select(event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
                p = pointer(event, currentTarget),
                currentTarget = event.currentTarget,
                x0 = event.clientX,
                y0 = event.clientY;
            dragDisable(event.view);
            nopropagation(event);
            g.mouse = [p, this.__zoom.invert(p)];
            interrupt(this);
            g.start();

            function mousemoved(event) {
              noevent(event);

              if (!g.moved) {
                var dx = event.clientX - x0,
                    dy = event.clientY - y0;
                g.moved = dx * dx + dy * dy > clickDistance2;
              }

              g.event(event).zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = pointer(event, currentTarget), g.mouse[1]), g.extent, translateExtent));
            }

            function mouseupped(event) {
              v.on("mousemove.zoom mouseup.zoom", null);
              yesdrag(event.view, g.moved);
              noevent(event);
              g.event(event).end();
            }
          }

          function dblclicked(event) {
            for (var _len3 = arguments.length, args = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
              args[_key3 - 1] = arguments[_key3];
            }

            if (!filter.apply(this, arguments)) return;
            var t0 = this.__zoom,
                p0 = pointer(event.changedTouches ? event.changedTouches[0] : event, this),
                p1 = t0.invert(p0),
                k1 = t0.k * (event.shiftKey ? 0.5 : 2),
                t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, args), translateExtent);
            noevent(event);
            if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0, event);else select(this).call(zoom.transform, t1, p0, event);
          }

          function touchstarted(event) {
            for (var _len4 = arguments.length, args = new Array(_len4 > 1 ? _len4 - 1 : 0), _key4 = 1; _key4 < _len4; _key4++) {
              args[_key4 - 1] = arguments[_key4];
            }

            if (!filter.apply(this, arguments)) return;
            var touches = event.touches,
                n = touches.length,
                g = gesture(this, args, event.changedTouches.length === n).event(event),
                started,
                i,
                t,
                p;
            nopropagation(event);

            for (i = 0; i < n; ++i) {
              t = touches[i], p = pointer(t, this);
              p = [p, this.__zoom.invert(p), t.identifier];
              if (!g.touch0) g.touch0 = p, started = true, g.taps = 1 + !!touchstarting;else if (!g.touch1 && g.touch0[2] !== p[2]) g.touch1 = p, g.taps = 0;
            }

            if (touchstarting) touchstarting = clearTimeout(touchstarting);

            if (started) {
              if (g.taps < 2) touchfirst = p[0], touchstarting = setTimeout(function () {
                touchstarting = null;
              }, touchDelay);
              interrupt(this);
              g.start();
            }
          }

          function touchmoved(event) {
            if (!this.__zooming) return;

            for (var _len5 = arguments.length, args = new Array(_len5 > 1 ? _len5 - 1 : 0), _key5 = 1; _key5 < _len5; _key5++) {
              args[_key5 - 1] = arguments[_key5];
            }

            var g = gesture(this, args).event(event),
                touches = event.changedTouches,
                n = touches.length,
                i,
                t,
                p,
                l;
            noevent(event);

            for (i = 0; i < n; ++i) {
              t = touches[i], p = pointer(t, this);
              if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
            }

            t = g.that.__zoom;

            if (g.touch1) {
              var p0 = g.touch0[0],
                  l0 = g.touch0[1],
                  p1 = g.touch1[0],
                  l1 = g.touch1[1],
                  dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
                  dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
              t = scale(t, Math.sqrt(dp / dl));
              p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
              l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
            } else if (g.touch0) p = g.touch0[0], l = g.touch0[1];else return;

            g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
          }

          function touchended(event) {
            for (var _len6 = arguments.length, args = new Array(_len6 > 1 ? _len6 - 1 : 0), _key6 = 1; _key6 < _len6; _key6++) {
              args[_key6 - 1] = arguments[_key6];
            }

            if (!this.__zooming) return;
            var g = gesture(this, args).event(event),
                touches = event.changedTouches,
                n = touches.length,
                i,
                t;
            nopropagation(event);
            if (touchending) clearTimeout(touchending);
            touchending = setTimeout(function () {
              touchending = null;
            }, touchDelay);

            for (i = 0; i < n; ++i) {
              t = touches[i];
              if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
            }

            if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;
            if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]);else {
              g.end(); // If this was a dbltap, reroute to the (optional) dblclick.zoom handler.

              if (g.taps === 2) {
                t = pointer(t, this);

                if (Math.hypot(touchfirst[0] - t[0], touchfirst[1] - t[1]) < tapDistance) {
                  var p = select(this).on("dblclick.zoom");
                  if (p) p.apply(this, arguments);
                }
              }
            }
          }

          zoom.wheelDelta = function (_) {
            return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant(+_), zoom) : wheelDelta;
          };

          zoom.filter = function (_) {
            return arguments.length ? (filter = typeof _ === "function" ? _ : constant(!!_), zoom) : filter;
          };

          zoom.touchable = function (_) {
            return arguments.length ? (touchable = typeof _ === "function" ? _ : constant(!!_), zoom) : touchable;
          };

          zoom.extent = function (_) {
            return arguments.length ? (extent = typeof _ === "function" ? _ : constant([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
          };

          zoom.scaleExtent = function (_) {
            return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
          };

          zoom.translateExtent = function (_) {
            return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
          };

          zoom.constrain = function (_) {
            return arguments.length ? (constrain = _, zoom) : constrain;
          };

          zoom.duration = function (_) {
            return arguments.length ? (duration = +_, zoom) : duration;
          };

          zoom.interpolate = function (_) {
            return arguments.length ? (interpolate = _, zoom) : interpolate;
          };

          zoom.on = function () {
            var value = listeners.on.apply(listeners, arguments);
            return value === listeners ? zoom : value;
          };

          zoom.clickDistance = function (_) {
            return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
          };

          zoom.tapDistance = function (_) {
            return arguments.length ? (tapDistance = +_, zoom) : tapDistance;
          };

          return zoom;
        }

        /*
            Bypasses features of D3's default projection stream pipeline that are unnecessary:
            * Antimeridian clipping
            * Spherical rotation
            * Resampling
        */

        function geoRawMercator() {
          var project = mercatorRaw;
          var k = 512 / Math.PI; // scale

          var x = 0;
          var y = 0; // translate

          var clipExtent = [[0, 0], [0, 0]];

          function projection(point) {
            point = project(point[0] * Math.PI / 180, point[1] * Math.PI / 180);
            return [point[0] * k + x, y - point[1] * k];
          }

          projection.invert = function (point) {
            point = project.invert((point[0] - x) / k, (y - point[1]) / k);
            return point && [point[0] * 180 / Math.PI, point[1] * 180 / Math.PI];
          };

          projection.scale = function (_) {
            if (!arguments.length) return k;
            k = +_;
            return projection;
          };

          projection.translate = function (_) {
            if (!arguments.length) return [x, y];
            x = +_[0];
            y = +_[1];
            return projection;
          };

          projection.clipExtent = function (_) {
            if (!arguments.length) return clipExtent;
            clipExtent = _;
            return projection;
          };

          projection.transform = function (obj) {
            if (!arguments.length) return identity$2.translate(x, y).scale(k);
            x = +obj.x;
            y = +obj.y;
            k = +obj.k;
            return projection;
          };

          projection.stream = d3_geoTransform({
            point: function point(x, y) {
              var vec = projection([x, y]);
              this.stream.point(vec[0], vec[1]);
            }
          }).stream;
          return projection;
        }

        function geoOrthoNormalizedDotProduct(a, b, origin) {
          if (geoVecEqual(origin, a) || geoVecEqual(origin, b)) {
            return 1; // coincident points, treat as straight and try to remove
          }

          return geoVecNormalizedDot(a, b, origin);
        }

        function geoOrthoFilterDotProduct(dotp, epsilon, lowerThreshold, upperThreshold, allowStraightAngles) {
          var val = Math.abs(dotp);

          if (val < epsilon) {
            return 0; // already orthogonal
          } else if (allowStraightAngles && Math.abs(val - 1) < epsilon) {
            return 0; // straight angle, which is okay in this case
          } else if (val < lowerThreshold || val > upperThreshold) {
            return dotp; // can be adjusted
          } else {
            return null; // ignore vertex
          }
        }

        function geoOrthoCalcScore(points, isClosed, epsilon, threshold) {
          var score = 0;
          var first = isClosed ? 0 : 1;
          var last = isClosed ? points.length : points.length - 1;
          var coords = points.map(function (p) {
            return p.coord;
          });
          var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
          var upperThreshold = Math.cos(threshold * Math.PI / 180);

          for (var i = first; i < last; i++) {
            var a = coords[(i - 1 + coords.length) % coords.length];
            var origin = coords[i];
            var b = coords[(i + 1) % coords.length];
            var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold);
            if (dotp === null) continue; // ignore vertex

            score = score + 2.0 * Math.min(Math.abs(dotp - 1.0), Math.min(Math.abs(dotp), Math.abs(dotp + 1)));
          }

          return score;
        } // returns the maximum angle less than `lessThan` between the actual corner and a 0° or 90° corner

        function geoOrthoMaxOffsetAngle(coords, isClosed, lessThan) {
          var max = -Infinity;
          var first = isClosed ? 0 : 1;
          var last = isClosed ? coords.length : coords.length - 1;

          for (var i = first; i < last; i++) {
            var a = coords[(i - 1 + coords.length) % coords.length];
            var origin = coords[i];
            var b = coords[(i + 1) % coords.length];
            var normalizedDotP = geoOrthoNormalizedDotProduct(a, b, origin);
            var angle = Math.acos(Math.abs(normalizedDotP)) * 180 / Math.PI;
            if (angle > 45) angle = 90 - angle;
            if (angle >= lessThan) continue;
            if (angle > max) max = angle;
          }

          if (max === -Infinity) return null;
          return max;
        } // similar to geoOrthoCalcScore, but returns quickly if there is something to do

        function geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles) {
          var score = null;
          var first = isClosed ? 0 : 1;
          var last = isClosed ? coords.length : coords.length - 1;
          var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
          var upperThreshold = Math.cos(threshold * Math.PI / 180);

          for (var i = first; i < last; i++) {
            var a = coords[(i - 1 + coords.length) % coords.length];
            var origin = coords[i];
            var b = coords[(i + 1) % coords.length];
            var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold, allowStraightAngles);
            if (dotp === null) continue; // ignore vertex

            if (Math.abs(dotp) > 0) return 1; // something to do

            score = 0; // already square
          }

          return score;
        }

        var onFreeze = internalMetadata.onFreeze;

        // eslint-disable-next-line es/no-object-freeze -- safe
        var $freeze = Object.freeze;
        var FAILS_ON_PRIMITIVES = fails(function () { $freeze(1); });

        // `Object.freeze` method
        // https://tc39.es/ecma262/#sec-object.freeze
        _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !freezing }, {
          freeze: function freeze(it) {
            return $freeze && isObject$4(it) ? $freeze(onFreeze(it)) : it;
          }
        });

        // Returns true if a and b have the same elements at the same indices.
        function utilArrayIdentical(a, b) {
          // an array is always identical to itself
          if (a === b) return true;
          var i = a.length;
          if (i !== b.length) return false;

          while (i--) {
            if (a[i] !== b[i]) return false;
          }

          return true;
        } // http://2ality.com/2015/01/es6-set-operations.html
        // Difference (a \ b): create a set that contains those elements of set a that are not in set b.
        // This operation is also sometimes called minus (-).
        // var a = [1,2,3];
        // var b = [4,3,2];
        // utilArrayDifference(a, b)
        //   [1]
        // utilArrayDifference(b, a)
        //   [4]

        function utilArrayDifference(a, b) {
          var other = new Set(b);
          return Array.from(new Set(a)).filter(function (v) {
            return !other.has(v);
          });
        } // Intersection (a ∩ b): create a set that contains those elements of set a that are also in set b.
        // var a = [1,2,3];
        // var b = [4,3,2];
        // utilArrayIntersection(a, b)
        //   [2,3]

        function utilArrayIntersection(a, b) {
          var other = new Set(b);
          return Array.from(new Set(a)).filter(function (v) {
            return other.has(v);
          });
        } // Union (a ∪ b): create a set that contains the elements of both set a and set b.
        // var a = [1,2,3];
        // var b = [4,3,2];
        // utilArrayUnion(a, b)
        //   [1,2,3,4]

        function utilArrayUnion(a, b) {
          var result = new Set(a);
          b.forEach(function (v) {
            result.add(v);
          });
          return Array.from(result);
        } // Returns an Array with all the duplicates removed
        // var a = [1,1,2,3,3];
        // utilArrayUniq(a)
        //   [1,2,3]

        function utilArrayUniq(a) {
          return Array.from(new Set(a));
        } // Splits array into chunks of given chunk size
        // var a = [1,2,3,4,5,6,7];
        // utilArrayChunk(a, 3);
        //   [[1,2,3],[4,5,6],[7]];

        function utilArrayChunk(a, chunkSize) {
          if (!chunkSize || chunkSize < 0) return [a.slice()];
          var result = new Array(Math.ceil(a.length / chunkSize));
          return Array.from(result, function (item, i) {
            return a.slice(i * chunkSize, i * chunkSize + chunkSize);
          });
        } // Flattens two level array into a single level
        // var a = [[1,2,3],[4,5,6],[7]];
        // utilArrayFlatten(a);
        //   [1,2,3,4,5,6,7];

        function utilArrayFlatten(a) {
          return a.reduce(function (acc, val) {
            return acc.concat(val);
          }, []);
        } // Groups the items of the Array according to the given key
        // `key` can be passed as a property or as a key function
        //
        // var pets = [
        //     { type: 'Dog', name: 'Spot' },
        //     { type: 'Cat', name: 'Tiger' },
        //     { type: 'Dog', name: 'Rover' },
        //     { type: 'Cat', name: 'Leo' }
        // ];
        //
        // utilArrayGroupBy(pets, 'type')
        //   {
        //     'Dog': [{type: 'Dog', name: 'Spot'}, {type: 'Dog', name: 'Rover'}],
        //     'Cat': [{type: 'Cat', name: 'Tiger'}, {type: 'Cat', name: 'Leo'}]
        //   }
        //
        // utilArrayGroupBy(pets, function(item) { return item.name.length; })
        //   {
        //     3: [{type: 'Cat', name: 'Leo'}],
        //     4: [{type: 'Dog', name: 'Spot'}],
        //     5: [{type: 'Cat', name: 'Tiger'}, {type: 'Dog', name: 'Rover'}]
        //   }

        function utilArrayGroupBy(a, key) {
          return a.reduce(function (acc, item) {
            var group = typeof key === 'function' ? key(item) : item[key];
            (acc[group] = acc[group] || []).push(item);
            return acc;
          }, {});
        } // Returns an Array with all the duplicates removed
        // where uniqueness determined by the given key
        // `key` can be passed as a property or as a key function
        //
        // var pets = [
        //     { type: 'Dog', name: 'Spot' },
        //     { type: 'Cat', name: 'Tiger' },
        //     { type: 'Dog', name: 'Rover' },
        //     { type: 'Cat', name: 'Leo' }
        // ];
        //
        // utilArrayUniqBy(pets, 'type')
        //   [
        //     { type: 'Dog', name: 'Spot' },
        //     { type: 'Cat', name: 'Tiger' }
        //   ]
        //
        // utilArrayUniqBy(pets, function(item) { return item.name.length; })
        //   [
        //     { type: 'Dog', name: 'Spot' },
        //     { type: 'Cat', name: 'Tiger' },
        //     { type: 'Cat', name: 'Leo' }
        //   }

        function utilArrayUniqBy(a, key) {
          var seen = new Set();
          return a.reduce(function (acc, item) {
            var val = typeof key === 'function' ? key(item) : item[key];

            if (val && !seen.has(val)) {
              seen.add(val);
              acc.push(item);
            }

            return acc;
          }, []);
        }

        // @@match logic
        fixRegexpWellKnownSymbolLogic('match', function (MATCH, nativeMatch, maybeCallNative) {
          return [
            // `String.prototype.match` method
            // https://tc39.es/ecma262/#sec-string.prototype.match
            function match(regexp) {
              var O = requireObjectCoercible(this);
              var matcher = regexp == undefined ? undefined : regexp[MATCH];
              return matcher !== undefined ? matcher.call(regexp, O) : new RegExp(regexp)[MATCH](String(O));
            },
            // `RegExp.prototype[@@match]` method
            // https://tc39.es/ecma262/#sec-regexp.prototype-@@match
            function (string) {
              var res = maybeCallNative(nativeMatch, this, string);
              if (res.done) return res.value;

              var rx = anObject(this);
              var S = String(string);

              if (!rx.global) return regexpExecAbstract(rx, S);

              var fullUnicode = rx.unicode;
              rx.lastIndex = 0;
              var A = [];
              var n = 0;
              var result;
              while ((result = regexpExecAbstract(rx, S)) !== null) {
                var matchStr = String(result[0]);
                A[n] = matchStr;
                if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);
                n++;
              }
              return n === 0 ? null : A;
            }
          ];
        });

        var remove$6 = removeDiacritics;
        var replacementList = [{
          base: ' ',
          chars: "\xA0"
        }, {
          base: '0',
          chars: "\u07C0"
        }, {
          base: 'A',
          chars: "\u24B6\uFF21\xC0\xC1\xC2\u1EA6\u1EA4\u1EAA\u1EA8\xC3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\xC4\u01DE\u1EA2\xC5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F"
        }, {
          base: 'AA',
          chars: "\uA732"
        }, {
          base: 'AE',
          chars: "\xC6\u01FC\u01E2"
        }, {
          base: 'AO',
          chars: "\uA734"
        }, {
          base: 'AU',
          chars: "\uA736"
        }, {
          base: 'AV',
          chars: "\uA738\uA73A"
        }, {
          base: 'AY',
          chars: "\uA73C"
        }, {
          base: 'B',
          chars: "\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0181"
        }, {
          base: 'C',
          chars: "\u24B8\uFF23\uA73E\u1E08\u0106C\u0108\u010A\u010C\xC7\u0187\u023B"
        }, {
          base: 'D',
          chars: "\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018A\u0189\u1D05\uA779"
        }, {
          base: 'Dh',
          chars: "\xD0"
        }, {
          base: 'DZ',
          chars: "\u01F1\u01C4"
        }, {
          base: 'Dz',
          chars: "\u01F2\u01C5"
        }, {
          base: 'E',
          chars: "\u025B\u24BA\uFF25\xC8\xC9\xCA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\xCB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E\u1D07"
        }, {
          base: 'F',
          chars: "\uA77C\u24BB\uFF26\u1E1E\u0191\uA77B"
        }, {
          base: 'G',
          chars: "\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E\u0262"
        }, {
          base: 'H',
          chars: "\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D"
        }, {
          base: 'I',
          chars: "\u24BE\uFF29\xCC\xCD\xCE\u0128\u012A\u012C\u0130\xCF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197"
        }, {
          base: 'J',
          chars: "\u24BF\uFF2A\u0134\u0248\u0237"
        }, {
          base: 'K',
          chars: "\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2"
        }, {
          base: 'L',
          chars: "\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780"
        }, {
          base: 'LJ',
          chars: "\u01C7"
        }, {
          base: 'Lj',
          chars: "\u01C8"
        }, {
          base: 'M',
          chars: "\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C\u03FB"
        }, {
          base: 'N',
          chars: "\uA7A4\u0220\u24C3\uFF2E\u01F8\u0143\xD1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u019D\uA790\u1D0E"
        }, {
          base: 'NJ',
          chars: "\u01CA"
        }, {
          base: 'Nj',
          chars: "\u01CB"
        }, {
          base: 'O',
          chars: "\u24C4\uFF2F\xD2\xD3\xD4\u1ED2\u1ED0\u1ED6\u1ED4\xD5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\xD6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\xD8\u01FE\u0186\u019F\uA74A\uA74C"
        }, {
          base: 'OE',
          chars: "\u0152"
        }, {
          base: 'OI',
          chars: "\u01A2"
        }, {
          base: 'OO',
          chars: "\uA74E"
        }, {
          base: 'OU',
          chars: "\u0222"
        }, {
          base: 'P',
          chars: "\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754"
        }, {
          base: 'Q',
          chars: "\u24C6\uFF31\uA756\uA758\u024A"
        }, {
          base: 'R',
          chars: "\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782"
        }, {
          base: 'S',
          chars: "\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784"
        }, {
          base: 'T',
          chars: "\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786"
        }, {
          base: 'Th',
          chars: "\xDE"
        }, {
          base: 'TZ',
          chars: "\uA728"
        }, {
          base: 'U',
          chars: "\u24CA\uFF35\xD9\xDA\xDB\u0168\u1E78\u016A\u1E7A\u016C\xDC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244"
        }, {
          base: 'V',
          chars: "\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245"
        }, {
          base: 'VY',
          chars: "\uA760"
        }, {
          base: 'W',
          chars: "\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72"
        }, {
          base: 'X',
          chars: "\u24CD\uFF38\u1E8A\u1E8C"
        }, {
          base: 'Y',
          chars: "\u24CE\uFF39\u1EF2\xDD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE"
        }, {
          base: 'Z',
          chars: "\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762"
        }, {
          base: 'a',
          chars: "\u24D0\uFF41\u1E9A\xE0\xE1\xE2\u1EA7\u1EA5\u1EAB\u1EA9\xE3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\xE4\u01DF\u1EA3\xE5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250\u0251"
        }, {
          base: 'aa',
          chars: "\uA733"
        }, {
          base: 'ae',
          chars: "\xE6\u01FD\u01E3"
        }, {
          base: 'ao',
          chars: "\uA735"
        }, {
          base: 'au',
          chars: "\uA737"
        }, {
          base: 'av',
          chars: "\uA739\uA73B"
        }, {
          base: 'ay',
          chars: "\uA73D"
        }, {
          base: 'b',
          chars: "\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253\u0182"
        }, {
          base: 'c',
          chars: "\uFF43\u24D2\u0107\u0109\u010B\u010D\xE7\u1E09\u0188\u023C\uA73F\u2184"
        }, {
          base: 'd',
          chars: "\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\u018B\u13E7\u0501\uA7AA"
        }, {
          base: 'dh',
          chars: "\xF0"
        }, {
          base: 'dz',
          chars: "\u01F3\u01C6"
        }, {
          base: 'e',
          chars: "\u24D4\uFF45\xE8\xE9\xEA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\xEB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u01DD"
        }, {
          base: 'f',
          chars: "\u24D5\uFF46\u1E1F\u0192"
        }, {
          base: 'ff',
          chars: "\uFB00"
        }, {
          base: 'fi',
          chars: "\uFB01"
        }, {
          base: 'fl',
          chars: "\uFB02"
        }, {
          base: 'ffi',
          chars: "\uFB03"
        }, {
          base: 'ffl',
          chars: "\uFB04"
        }, {
          base: 'g',
          chars: "\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\uA77F\u1D79"
        }, {
          base: 'h',
          chars: "\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265"
        }, {
          base: 'hv',
          chars: "\u0195"
        }, {
          base: 'i',
          chars: "\u24D8\uFF49\xEC\xED\xEE\u0129\u012B\u012D\xEF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131"
        }, {
          base: 'j',
          chars: "\u24D9\uFF4A\u0135\u01F0\u0249"
        }, {
          base: 'k',
          chars: "\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3"
        }, {
          base: 'l',
          chars: "\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747\u026D"
        }, {
          base: 'lj',
          chars: "\u01C9"
        }, {
          base: 'm',
          chars: "\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F"
        }, {
          base: 'n',
          chars: "\u24DD\uFF4E\u01F9\u0144\xF1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5\u043B\u0509"
        }, {
          base: 'nj',
          chars: "\u01CC"
        }, {
          base: 'o',
          chars: "\u24DE\uFF4F\xF2\xF3\xF4\u1ED3\u1ED1\u1ED7\u1ED5\xF5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\xF6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\xF8\u01FF\uA74B\uA74D\u0275\u0254\u1D11"
        }, {
          base: 'oe',
          chars: "\u0153"
        }, {
          base: 'oi',
          chars: "\u01A3"
        }, {
          base: 'oo',
          chars: "\uA74F"
        }, {
          base: 'ou',
          chars: "\u0223"
        }, {
          base: 'p',
          chars: "\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755\u03C1"
        }, {
          base: 'q',
          chars: "\u24E0\uFF51\u024B\uA757\uA759"
        }, {
          base: 'r',
          chars: "\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783"
        }, {
          base: 's',
          chars: "\u24E2\uFF53\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B\u0282"
        }, {
          base: 'ss',
          chars: "\xDF"
        }, {
          base: 't',
          chars: "\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787"
        }, {
          base: 'th',
          chars: "\xFE"
        }, {
          base: 'tz',
          chars: "\uA729"
        }, {
          base: 'u',
          chars: "\u24E4\uFF55\xF9\xFA\xFB\u0169\u1E79\u016B\u1E7B\u016D\xFC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289"
        }, {
          base: 'v',
          chars: "\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C"
        }, {
          base: 'vy',
          chars: "\uA761"
        }, {
          base: 'w',
          chars: "\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73"
        }, {
          base: 'x',
          chars: "\u24E7\uFF58\u1E8B\u1E8D"
        }, {
          base: 'y',
          chars: "\u24E8\uFF59\u1EF3\xFD\u0177\u1EF9\u0233\u1E8F\xFF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF"
        }, {
          base: 'z',
          chars: "\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763"
        }];
        var diacriticsMap = {};

        for (var i$1 = 0; i$1 < replacementList.length; i$1 += 1) {
          var chars = replacementList[i$1].chars;

          for (var j$1 = 0; j$1 < chars.length; j$1 += 1) {
            diacriticsMap[chars[j$1]] = replacementList[i$1].base;
          }
        }

        function removeDiacritics(str) {
          return str.replace(/[^\u0000-\u007e]/g, function (c) {
            return diacriticsMap[c] || c;
          });
        }

        var replacementList_1 = replacementList;
        var diacriticsMap_1 = diacriticsMap;
        var diacritics = {
          remove: remove$6,
          replacementList: replacementList_1,
          diacriticsMap: diacriticsMap_1
        };

        var arabicBlocks = [[0x0600, 0x06FF], [0x0750, 0x077F], [0x08A0, 0x08FF], [0xFB50, 0xFDFF], [0xFE70, 0xFEFF], [0x10E60, 0x10E7F], [0x1EC70, 0x1ECBF], [0x1EE00, 0x1EEFF] // Mathematical Alphabetic symbols https://www.unicode.org/charts/PDF/U1EE00.pdf
        ];

        function isArabic(_char) {
          if (_char.length > 1) {
            // allow the newer chars?
            throw new Error('isArabic works on only one-character strings');
          }

          var code = _char.charCodeAt(0);

          for (var i = 0; i < arabicBlocks.length; i++) {
            var block = arabicBlocks[i];

            if (code >= block[0] && code <= block[1]) {
              return true;
            }
          }

          return false;
        }

        var isArabic_2 = isArabic;

        function isMath(_char2) {
          if (_char2.length > 2) {
            // allow the newer chars?
            throw new Error('isMath works on only one-character strings');
          }

          var code = _char2.charCodeAt(0);

          return code >= 0x660 && code <= 0x66C || code >= 0x6F0 && code <= 0x6F9;
        }

        var isMath_1 = isMath;
        var isArabic_1 = /*#__PURE__*/Object.defineProperty({
          isArabic: isArabic_2,
          isMath: isMath_1
        }, '__esModule', {
          value: true
        });

        var arabicReference = {
          "alef": {
            "normal": ["\u0627"],
            "madda_above": {
              "normal": ["\u0627\u0653", "\u0622"],
              "isolated": "\uFE81",
              "final": "\uFE82"
            },
            "hamza_above": {
              "normal": ["\u0627\u0654", "\u0623"],
              "isolated": "\uFE83",
              "final": "\uFE84"
            },
            "hamza_below": {
              "normal": ["\u0627\u0655", "\u0625"],
              "isolated": "\uFE87",
              "final": "\uFE88"
            },
            "wasla": {
              "normal": "\u0671",
              "isolated": "\uFB50",
              "final": "\uFB51"
            },
            "wavy_hamza_above": ["\u0672"],
            "wavy_hamza_below": ["\u0627\u065F", "\u0673"],
            "high_hamza": ["\u0675", "\u0627\u0674"],
            "indic_two_above": ["\u0773"],
            "indic_three_above": ["\u0774"],
            "fathatan": {
              "normal": ["\u0627\u064B"],
              "final": "\uFD3C",
              "isolated": "\uFD3D"
            },
            "isolated": "\uFE8D",
            "final": "\uFE8E"
          },
          "beh": {
            "normal": ["\u0628"],
            "dotless": ["\u066E"],
            "three_dots_horizontally_below": ["\u0750"],
            "dot_below_three_dots_above": ["\u0751"],
            "three_dots_pointing_upwards_below": ["\u0752"],
            "three_dots_pointing_upwards_below_two_dots_above": ["\u0753"],
            "two_dots_below_dot_above": ["\u0754"],
            "inverted_small_v_below": ["\u0755"],
            "small_v": ["\u0756"],
            "small_v_below": ["\u08A0"],
            "hamza_above": ["\u08A1"],
            "small_meem_above": ["\u08B6"],
            "isolated": "\uFE8F",
            "final": "\uFE90",
            "initial": "\uFE91",
            "medial": "\uFE92"
          },
          "teh marbuta": {
            "normal": ["\u0629"],
            "isolated": "\uFE93",
            "final": "\uFE94"
          },
          "teh": {
            "normal": ["\u062A"],
            "ring": ["\u067C"],
            "three_dots_above_downwards": ["\u067D"],
            "small_teh_above": ["\u08B8"],
            "isolated": "\uFE95",
            "final": "\uFE96",
            "initial": "\uFE97",
            "medial": "\uFE98"
          },
          "theh": {
            "normal": ["\u062B"],
            "isolated": "\uFE99",
            "final": "\uFE9A",
            "initial": "\uFE9B",
            "medial": "\uFE9C"
          },
          "jeem": {
            "normal": ["\u062C"],
            "two_dots_above": ["\u08A2"],
            "isolated": "\uFE9D",
            "final": "\uFE9E",
            "initial": "\uFE9F",
            "medial": "\uFEA0"
          },
          "hah": {
            "normal": ["\u062D"],
            "hamza_above": ["\u0681"],
            "two_dots_vertical_above": ["\u0682"],
            "three_dots_above": ["\u0685"],
            "two_dots_above": ["\u0757"],
            "three_dots_pointing_upwards_below": ["\u0758"],
            "small_tah_below": ["\u076E"],
            "small_tah_two_dots": ["\u076F"],
            "small_tah_above": ["\u0772"],
            "indic_four_below": ["\u077C"],
            "isolated": "\uFEA1",
            "final": "\uFEA2",
            "initial": "\uFEA3",
            "medial": "\uFEA4"
          },
          "khah": {
            "normal": ["\u062E"],
            "isolated": "\uFEA5",
            "final": "\uFEA6",
            "initial": "\uFEA7",
            "medial": "\uFEA8"
          },
          "dal": {
            "normal": ["\u062F"],
            "ring": ["\u0689"],
            "dot_below": ["\u068A"],
            "dot_below_small_tah": ["\u068B"],
            "three_dots_above_downwards": ["\u068F"],
            "four_dots_above": ["\u0690"],
            "inverted_v": ["\u06EE"],
            "two_dots_vertically_below_small_tah": ["\u0759"],
            "inverted_small_v_below": ["\u075A"],
            "three_dots_below": ["\u08AE"],
            "isolated": "\uFEA9",
            "final": "\uFEAA"
          },
          "thal": {
            "normal": ["\u0630"],
            "isolated": "\uFEAB",
            "final": "\uFEAC"
          },
          "reh": {
            "normal": ["\u0631"],
            "small_v": ["\u0692"],
            "ring": ["\u0693"],
            "dot_below": ["\u0694"],
            "small_v_below": ["\u0695"],
            "dot_below_dot_above": ["\u0696"],
            "two_dots_above": ["\u0697"],
            "four_dots_above": ["\u0699"],
            "inverted_v": ["\u06EF"],
            "stroke": ["\u075B"],
            "two_dots_vertically_above": ["\u076B"],
            "hamza_above": ["\u076C"],
            "small_tah_two_dots": ["\u0771"],
            "loop": ["\u08AA"],
            "small_noon_above": ["\u08B9"],
            "isolated": "\uFEAD",
            "final": "\uFEAE"
          },
          "zain": {
            "normal": ["\u0632"],
            "inverted_v_above": ["\u08B2"],
            "isolated": "\uFEAF",
            "final": "\uFEB0"
          },
          "seen": {
            "normal": ["\u0633"],
            "dot_below_dot_above": ["\u069A"],
            "three_dots_below": ["\u069B"],
            "three_dots_below_three_dots_above": ["\u069C"],
            "four_dots_above": ["\u075C"],
            "two_dots_vertically_above": ["\u076D"],
            "small_tah_two_dots": ["\u0770"],
            "indic_four_above": ["\u077D"],
            "inverted_v": ["\u077E"],
            "isolated": "\uFEB1",
            "final": "\uFEB2",
            "initial": "\uFEB3",
            "medial": "\uFEB4"
          },
          "sheen": {
            "normal": ["\u0634"],
            "dot_below": ["\u06FA"],
            "isolated": "\uFEB5",
            "final": "\uFEB6",
            "initial": "\uFEB7",
            "medial": "\uFEB8"
          },
          "sad": {
            "normal": ["\u0635"],
            "two_dots_below": ["\u069D"],
            "three_dots_above": ["\u069E"],
            "three_dots_below": ["\u08AF"],
            "isolated": "\uFEB9",
            "final": "\uFEBA",
            "initial": "\uFEBB",
            "medial": "\uFEBC"
          },
          "dad": {
            "normal": ["\u0636"],
            "dot_below": ["\u06FB"],
            "isolated": "\uFEBD",
            "final": "\uFEBE",
            "initial": "\uFEBF",
            "medial": "\uFEC0"
          },
          "tah": {
            "normal": ["\u0637"],
            "three_dots_above": ["\u069F"],
            "two_dots_above": ["\u08A3"],
            "isolated": "\uFEC1",
            "final": "\uFEC2",
            "initial": "\uFEC3",
            "medial": "\uFEC4"
          },
          "zah": {
            "normal": ["\u0638"],
            "isolated": "\uFEC5",
            "final": "\uFEC6",
            "initial": "\uFEC7",
            "medial": "\uFEC8"
          },
          "ain": {
            "normal": ["\u0639"],
            "three_dots_above": ["\u06A0"],
            "two_dots_above": ["\u075D"],
            "three_dots_pointing_downwards_above": ["\u075E"],
            "two_dots_vertically_above": ["\u075F"],
            "three_dots_below": ["\u08B3"],
            "isolated": "\uFEC9",
            "final": "\uFECA",
            "initial": "\uFECB",
            "medial": "\uFECC"
          },
          "ghain": {
            "normal": ["\u063A"],
            "dot_below": ["\u06FC"],
            "isolated": "\uFECD",
            "final": "\uFECE",
            "initial": "\uFECF",
            "medial": "\uFED0"
          },
          "feh": {
            "normal": ["\u0641"],
            "dotless": ["\u06A1"],
            "dot_moved_below": ["\u06A2"],
            "dot_below": ["\u06A3"],
            "three_dots_below": ["\u06A5"],
            "two_dots_below": ["\u0760"],
            "three_dots_pointing_upwards_below": ["\u0761"],
            "dot_below_three_dots_above": ["\u08A4"],
            "isolated": "\uFED1",
            "final": "\uFED2",
            "initial": "\uFED3",
            "medial": "\uFED4"
          },
          "qaf": {
            "normal": ["\u0642"],
            "dotless": ["\u066F"],
            "dot_above": ["\u06A7"],
            "three_dots_above": ["\u06A8"],
            "dot_below": ["\u08A5"],
            "isolated": "\uFED5",
            "final": "\uFED6",
            "initial": "\uFED7",
            "medial": "\uFED8"
          },
          "kaf": {
            "normal": ["\u0643"],
            "swash": ["\u06AA"],
            "ring": ["\u06AB"],
            "dot_above": ["\u06AC"],
            "three_dots_below": ["\u06AE"],
            "two_dots_above": ["\u077F"],
            "dot_below": ["\u08B4"],
            "isolated": "\uFED9",
            "final": "\uFEDA",
            "initial": "\uFEDB",
            "medial": "\uFEDC"
          },
          "lam": {
            "normal": ["\u0644"],
            "small_v": ["\u06B5"],
            "dot_above": ["\u06B6"],
            "three_dots_above": ["\u06B7"],
            "three_dots_below": ["\u06B8"],
            "bar": ["\u076A"],
            "double_bar": ["\u08A6"],
            "isolated": "\uFEDD",
            "final": "\uFEDE",
            "initial": "\uFEDF",
            "medial": "\uFEE0"
          },
          "meem": {
            "normal": ["\u0645"],
            "dot_above": ["\u0765"],
            "dot_below": ["\u0766"],
            "three_dots_above": ["\u08A7"],
            "isolated": "\uFEE1",
            "final": "\uFEE2",
            "initial": "\uFEE3",
            "medial": "\uFEE4"
          },
          "noon": {
            "normal": ["\u0646"],
            "dot_below": ["\u06B9"],
            "ring": ["\u06BC"],
            "three_dots_above": ["\u06BD"],
            "two_dots_below": ["\u0767"],
            "small_tah": ["\u0768"],
            "small_v": ["\u0769"],
            "isolated": "\uFEE5",
            "final": "\uFEE6",
            "initial": "\uFEE7",
            "medial": "\uFEE8"
          },
          "heh": {
            "normal": ["\u0647"],
            "isolated": "\uFEE9",
            "final": "\uFEEA",
            "initial": "\uFEEB",
            "medial": "\uFEEC"
          },
          "waw": {
            "normal": ["\u0648"],
            "hamza_above": {
              "normal": ["\u0624", "\u0648\u0654"],
              "isolated": "\uFE85",
              "final": "\uFE86"
            },
            "high_hamza": ["\u0676", "\u0648\u0674"],
            "ring": ["\u06C4"],
            "two_dots_above": ["\u06CA"],
            "dot_above": ["\u06CF"],
            "indic_two_above": ["\u0778"],
            "indic_three_above": ["\u0779"],
            "dot_within": ["\u08AB"],
            "isolated": "\uFEED",
            "final": "\uFEEE"
          },
          "alef_maksura": {
            "normal": ["\u0649"],
            "hamza_above": ["\u0626", "\u064A\u0654"],
            "initial": "\uFBE8",
            "medial": "\uFBE9",
            "isolated": "\uFEEF",
            "final": "\uFEF0"
          },
          "yeh": {
            "normal": ["\u064A"],
            "hamza_above": {
              "normal": ["\u0626", "\u0649\u0654"],
              "isolated": "\uFE89",
              "final": "\uFE8A",
              "initial": "\uFE8B",
              "medial": "\uFE8C"
            },
            "two_dots_below_hamza_above": ["\u08A8"],
            "high_hamza": ["\u0678", "\u064A\u0674"],
            "tail": ["\u06CD"],
            "small_v": ["\u06CE"],
            "three_dots_below": ["\u06D1"],
            "two_dots_below_dot_above": ["\u08A9"],
            "two_dots_below_small_noon_above": ["\u08BA"],
            "isolated": "\uFEF1",
            "final": "\uFEF2",
            "initial": "\uFEF3",
            "medial": "\uFEF4"
          },
          "tteh": {
            "normal": ["\u0679"],
            "isolated": "\uFB66",
            "final": "\uFB67",
            "initial": "\uFB68",
            "medial": "\uFB69"
          },
          "tteheh": {
            "normal": ["\u067A"],
            "isolated": "\uFB5E",
            "final": "\uFB5F",
            "initial": "\uFB60",
            "medial": "\uFB61"
          },
          "beeh": {
            "normal": ["\u067B"],
            "isolated": "\uFB52",
            "final": "\uFB53",
            "initial": "\uFB54",
            "medial": "\uFB55"
          },
          "peh": {
            "normal": ["\u067E"],
            "small_meem_above": ["\u08B7"],
            "isolated": "\uFB56",
            "final": "\uFB57",
            "initial": "\uFB58",
            "medial": "\uFB59"
          },
          "teheh": {
            "normal": ["\u067F"],
            "isolated": "\uFB62",
            "final": "\uFB63",
            "initial": "\uFB64",
            "medial": "\uFB65"
          },
          "beheh": {
            "normal": ["\u0680"],
            "isolated": "\uFB5A",
            "final": "\uFB5B",
            "initial": "\uFB5C",
            "medial": "\uFB5D"
          },
          "nyeh": {
            "normal": ["\u0683"],
            "isolated": "\uFB76",
            "final": "\uFB77",
            "initial": "\uFB78",
            "medial": "\uFB79"
          },
          "dyeh": {
            "normal": ["\u0684"],
            "isolated": "\uFB72",
            "final": "\uFB73",
            "initial": "\uFB74",
            "medial": "\uFB75"
          },
          "tcheh": {
            "normal": ["\u0686"],
            "dot_above": ["\u06BF"],
            "isolated": "\uFB7A",
            "final": "\uFB7B",
            "initial": "\uFB7C",
            "medial": "\uFB7D"
          },
          "tcheheh": {
            "normal": ["\u0687"],
            "isolated": "\uFB7E",
            "final": "\uFB7F",
            "initial": "\uFB80",
            "medial": "\uFB81"
          },
          "ddal": {
            "normal": ["\u0688"],
            "isolated": "\uFB88",
            "final": "\uFB89"
          },
          "dahal": {
            "normal": ["\u068C"],
            "isolated": "\uFB84",
            "final": "\uFB85"
          },
          "ddahal": {
            "normal": ["\u068D"],
            "isolated": "\uFB82",
            "final": "\uFB83"
          },
          "dul": {
            "normal": ["\u068F", "\u068E"],
            "isolated": "\uFB86",
            "final": "\uFB87"
          },
          "rreh": {
            "normal": ["\u0691"],
            "isolated": "\uFB8C",
            "final": "\uFB8D"
          },
          "jeh": {
            "normal": ["\u0698"],
            "isolated": "\uFB8A",
            "final": "\uFB8B"
          },
          "veh": {
            "normal": ["\u06A4"],
            "isolated": "\uFB6A",
            "final": "\uFB6B",
            "initial": "\uFB6C",
            "medial": "\uFB6D"
          },
          "peheh": {
            "normal": ["\u06A6"],
            "isolated": "\uFB6E",
            "final": "\uFB6F",
            "initial": "\uFB70",
            "medial": "\uFB71"
          },
          "keheh": {
            "normal": ["\u06A9"],
            "dot_above": ["\u0762"],
            "three_dots_above": ["\u0763"],
            "three_dots_pointing_upwards_below": ["\u0764"],
            "isolated": "\uFB8E",
            "final": "\uFB8F",
            "initial": "\uFB90",
            "medial": "\uFB91"
          },
          "ng": {
            "normal": ["\u06AD"],
            "isolated": "\uFBD3",
            "final": "\uFBD4",
            "initial": "\uFBD5",
            "medial": "\uFBD6"
          },
          "gaf": {
            "normal": ["\u06AF"],
            "ring": ["\u06B0"],
            "two_dots_below": ["\u06B2"],
            "three_dots_above": ["\u06B4"],
            "inverted_stroke": ["\u08B0"],
            "isolated": "\uFB92",
            "final": "\uFB93",
            "initial": "\uFB94",
            "medial": "\uFB95"
          },
          "ngoeh": {
            "normal": ["\u06B1"],
            "isolated": "\uFB9A",
            "final": "\uFB9B",
            "initial": "\uFB9C",
            "medial": "\uFB9D"
          },
          "gueh": {
            "normal": ["\u06B3"],
            "isolated": "\uFB96",
            "final": "\uFB97",
            "initial": "\uFB98",
            "medial": "\uFB99"
          },
          "noon ghunna": {
            "normal": ["\u06BA"],
            "isolated": "\uFB9E",
            "final": "\uFB9F"
          },
          "rnoon": {
            "normal": ["\u06BB"],
            "isolated": "\uFBA0",
            "final": "\uFBA1",
            "initial": "\uFBA2",
            "medial": "\uFBA3"
          },
          "heh doachashmee": {
            "normal": ["\u06BE"],
            "isolated": "\uFBAA",
            "final": "\uFBAB",
            "initial": "\uFBAC",
            "medial": "\uFBAD"
          },
          "heh goal": {
            "normal": ["\u06C1"],
            "hamza_above": ["\u06C1\u0654", "\u06C2"],
            "isolated": "\uFBA6",
            "final": "\uFBA7",
            "initial": "\uFBA8",
            "medial": "\uFBA9"
          },
          "teh marbuta goal": {
            "normal": ["\u06C3"]
          },
          "kirghiz oe": {
            "normal": ["\u06C5"],
            "isolated": "\uFBE0",
            "final": "\uFBE1"
          },
          "oe": {
            "normal": ["\u06C6"],
            "isolated": "\uFBD9",
            "final": "\uFBDA"
          },
          "u": {
            "normal": ["\u06C7"],
            "hamza_above": {
              "normal": ["\u0677", "\u06C7\u0674"],
              "isolated": "\uFBDD"
            },
            "isolated": "\uFBD7",
            "final": "\uFBD8"
          },
          "yu": {
            "normal": ["\u06C8"],
            "isolated": "\uFBDB",
            "final": "\uFBDC"
          },
          "kirghiz yu": {
            "normal": ["\u06C9"],
            "isolated": "\uFBE2",
            "final": "\uFBE3"
          },
          "ve": {
            "normal": ["\u06CB"],
            "isolated": "\uFBDE",
            "final": "\uFBDF"
          },
          "farsi yeh": {
            "normal": ["\u06CC"],
            "indic_two_above": ["\u0775"],
            "indic_three_above": ["\u0776"],
            "indic_four_above": ["\u0777"],
            "isolated": "\uFBFC",
            "final": "\uFBFD",
            "initial": "\uFBFE",
            "medial": "\uFBFF"
          },
          "e": {
            "normal": ["\u06D0"],
            "isolated": "\uFBE4",
            "final": "\uFBE5",
            "initial": "\uFBE6",
            "medial": "\uFBE7"
          },
          "yeh barree": {
            "normal": ["\u06D2"],
            "hamza_above": {
              "normal": ["\u06D2\u0654", "\u06D3"],
              "isolated": "\uFBB0",
              "final": "\uFBB1"
            },
            "indic_two_above": ["\u077A"],
            "indic_three_above": ["\u077B"],
            "isolated": "\uFBAE",
            "final": "\uFBAF"
          },
          "ae": {
            "normal": ["\u06D5"],
            "isolated": "\u06D5",
            "final": "\uFEEA",
            "yeh_above": {
              "normal": ["\u06C0", "\u06D5\u0654"],
              "isolated": "\uFBA4",
              "final": "\uFBA5"
            }
          },
          "rohingya yeh": {
            "normal": ["\u08AC"]
          },
          "low alef": {
            "normal": ["\u08AD"]
          },
          "straight waw": {
            "normal": ["\u08B1"]
          },
          "african feh": {
            "normal": ["\u08BB"]
          },
          "african qaf": {
            "normal": ["\u08BC"]
          },
          "african noon": {
            "normal": ["\u08BD"]
          }
        };
        var _default$3 = arabicReference;
        var unicodeArabic = /*#__PURE__*/Object.defineProperty({
          "default": _default$3
        }, '__esModule', {
          value: true
        });

        var ligatureReference = {
          "\u0626\u0627": {
            "isolated": "\uFBEA",
            "final": "\uFBEB"
          },
          "\u0626\u06D5": {
            "isolated": "\uFBEC",
            "final": "\uFBED"
          },
          "\u0626\u0648": {
            "isolated": "\uFBEE",
            "final": "\uFBEF"
          },
          "\u0626\u06C7": {
            "isolated": "\uFBF0",
            "final": "\uFBF1"
          },
          "\u0626\u06C6": {
            "isolated": "\uFBF2",
            "final": "\uFBF3"
          },
          "\u0626\u06C8": {
            "isolated": "\uFBF4",
            "final": "\uFBF5"
          },
          "\u0626\u06D0": {
            "isolated": "\uFBF6",
            "final": "\uFBF7",
            "initial": "\uFBF8"
          },
          "\u0626\u0649": {
            "uighur_kirghiz": {
              "isolated": "\uFBF9",
              "final": "\uFBFA",
              "initial": "\uFBFB"
            },
            "isolated": "\uFC03",
            "final": "\uFC68"
          },
          "\u0626\u062C": {
            "isolated": "\uFC00",
            "initial": "\uFC97"
          },
          "\u0626\u062D": {
            "isolated": "\uFC01",
            "initial": "\uFC98"
          },
          "\u0626\u0645": {
            "isolated": "\uFC02",
            "final": "\uFC66",
            "initial": "\uFC9A",
            "medial": "\uFCDF"
          },
          "\u0626\u064A": {
            "isolated": "\uFC04",
            "final": "\uFC69"
          },
          "\u0628\u062C": {
            "isolated": "\uFC05",
            "initial": "\uFC9C"
          },
          "\u0628\u062D": {
            "isolated": "\uFC06",
            "initial": "\uFC9D"
          },
          "\u0628\u062E": {
            "isolated": "\uFC07",
            "initial": "\uFC9E"
          },
          "\u0628\u0645": {
            "isolated": "\uFC08",
            "final": "\uFC6C",
            "initial": "\uFC9F",
            "medial": "\uFCE1"
          },
          "\u0628\u0649": {
            "isolated": "\uFC09",
            "final": "\uFC6E"
          },
          "\u0628\u064A": {
            "isolated": "\uFC0A",
            "final": "\uFC6F"
          },
          "\u062A\u062C": {
            "isolated": "\uFC0B",
            "initial": "\uFCA1"
          },
          "\u062A\u062D": {
            "isolated": "\uFC0C",
            "initial": "\uFCA2"
          },
          "\u062A\u062E": {
            "isolated": "\uFC0D",
            "initial": "\uFCA3"
          },
          "\u062A\u0645": {
            "isolated": "\uFC0E",
            "final": "\uFC72",
            "initial": "\uFCA4",
            "medial": "\uFCE3"
          },
          "\u062A\u0649": {
            "isolated": "\uFC0F",
            "final": "\uFC74"
          },
          "\u062A\u064A": {
            "isolated": "\uFC10",
            "final": "\uFC75"
          },
          "\u062B\u062C": {
            "isolated": "\uFC11"
          },
          "\u062B\u0645": {
            "isolated": "\uFC12",
            "final": "\uFC78",
            "initial": "\uFCA6",
            "medial": "\uFCE5"
          },
          "\u062B\u0649": {
            "isolated": "\uFC13",
            "final": "\uFC7A"
          },
          "\u062B\u0648": {
            "isolated": "\uFC14"
          },
          "\u062C\u062D": {
            "isolated": "\uFC15",
            "initial": "\uFCA7"
          },
          "\u062C\u0645": {
            "isolated": "\uFC16",
            "initial": "\uFCA8"
          },
          "\u062D\u062C": {
            "isolated": "\uFC17",
            "initial": "\uFCA9"
          },
          "\u062D\u0645": {
            "isolated": "\uFC18",
            "initial": "\uFCAA"
          },
          "\u062E\u062C": {
            "isolated": "\uFC19",
            "initial": "\uFCAB"
          },
          "\u062E\u062D": {
            "isolated": "\uFC1A"
          },
          "\u062E\u0645": {
            "isolated": "\uFC1B",
            "initial": "\uFCAC"
          },
          "\u0633\u062C": {
            "isolated": "\uFC1C",
            "initial": "\uFCAD",
            "medial": "\uFD34"
          },
          "\u0633\u062D": {
            "isolated": "\uFC1D",
            "initial": "\uFCAE",
            "medial": "\uFD35"
          },
          "\u0633\u062E": {
            "isolated": "\uFC1E",
            "initial": "\uFCAF",
            "medial": "\uFD36"
          },
          "\u0633\u0645": {
            "isolated": "\uFC1F",
            "initial": "\uFCB0",
            "medial": "\uFCE7"
          },
          "\u0635\u062D": {
            "isolated": "\uFC20",
            "initial": "\uFCB1"
          },
          "\u0635\u0645": {
            "isolated": "\uFC21",
            "initial": "\uFCB3"
          },
          "\u0636\u062C": {
            "isolated": "\uFC22",
            "initial": "\uFCB4"
          },
          "\u0636\u062D": {
            "isolated": "\uFC23",
            "initial": "\uFCB5"
          },
          "\u0636\u062E": {
            "isolated": "\uFC24",
            "initial": "\uFCB6"
          },
          "\u0636\u0645": {
            "isolated": "\uFC25",
            "initial": "\uFCB7"
          },
          "\u0637\u062D": {
            "isolated": "\uFC26",
            "initial": "\uFCB8"
          },
          "\u0637\u0645": {
            "isolated": "\uFC27",
            "initial": "\uFD33",
            "medial": "\uFD3A"
          },
          "\u0638\u0645": {
            "isolated": "\uFC28",
            "initial": "\uFCB9",
            "medial": "\uFD3B"
          },
          "\u0639\u062C": {
            "isolated": "\uFC29",
            "initial": "\uFCBA"
          },
          "\u0639\u0645": {
            "isolated": "\uFC2A",
            "initial": "\uFCBB"
          },
          "\u063A\u062C": {
            "isolated": "\uFC2B",
            "initial": "\uFCBC"
          },
          "\u063A\u0645": {
            "isolated": "\uFC2C",
            "initial": "\uFCBD"
          },
          "\u0641\u062C": {
            "isolated": "\uFC2D",
            "initial": "\uFCBE"
          },
          "\u0641\u062D": {
            "isolated": "\uFC2E",
            "initial": "\uFCBF"
          },
          "\u0641\u062E": {
            "isolated": "\uFC2F",
            "initial": "\uFCC0"
          },
          "\u0641\u0645": {
            "isolated": "\uFC30",
            "initial": "\uFCC1"
          },
          "\u0641\u0649": {
            "isolated": "\uFC31",
            "final": "\uFC7C"
          },
          "\u0641\u064A": {
            "isolated": "\uFC32",
            "final": "\uFC7D"
          },
          "\u0642\u062D": {
            "isolated": "\uFC33",
            "initial": "\uFCC2"
          },
          "\u0642\u0645": {
            "isolated": "\uFC34",
            "initial": "\uFCC3"
          },
          "\u0642\u0649": {
            "isolated": "\uFC35",
            "final": "\uFC7E"
          },
          "\u0642\u064A": {
            "isolated": "\uFC36",
            "final": "\uFC7F"
          },
          "\u0643\u0627": {
            "isolated": "\uFC37",
            "final": "\uFC80"
          },
          "\u0643\u062C": {
            "isolated": "\uFC38",
            "initial": "\uFCC4"
          },
          "\u0643\u062D": {
            "isolated": "\uFC39",
            "initial": "\uFCC5"
          },
          "\u0643\u062E": {
            "isolated": "\uFC3A",
            "initial": "\uFCC6"
          },
          "\u0643\u0644": {
            "isolated": "\uFC3B",
            "final": "\uFC81",
            "initial": "\uFCC7",
            "medial": "\uFCEB"
          },
          "\u0643\u0645": {
            "isolated": "\uFC3C",
            "final": "\uFC82",
            "initial": "\uFCC8",
            "medial": "\uFCEC"
          },
          "\u0643\u0649": {
            "isolated": "\uFC3D",
            "final": "\uFC83"
          },
          "\u0643\u064A": {
            "isolated": "\uFC3E",
            "final": "\uFC84"
          },
          "\u0644\u062C": {
            "isolated": "\uFC3F",
            "initial": "\uFCC9"
          },
          "\u0644\u062D": {
            "isolated": "\uFC40",
            "initial": "\uFCCA"
          },
          "\u0644\u062E": {
            "isolated": "\uFC41",
            "initial": "\uFCCB"
          },
          "\u0644\u0645": {
            "isolated": "\uFC42",
            "final": "\uFC85",
            "initial": "\uFCCC",
            "medial": "\uFCED"
          },
          "\u0644\u0649": {
            "isolated": "\uFC43",
            "final": "\uFC86"
          },
          "\u0644\u064A": {
            "isolated": "\uFC44",
            "final": "\uFC87"
          },
          "\u0645\u062C": {
            "isolated": "\uFC45",
            "initial": "\uFCCE"
          },
          "\u0645\u062D": {
            "isolated": "\uFC46",
            "initial": "\uFCCF"
          },
          "\u0645\u062E": {
            "isolated": "\uFC47",
            "initial": "\uFCD0"
          },
          "\u0645\u0645": {
            "isolated": "\uFC48",
            "final": "\uFC89",
            "initial": "\uFCD1"
          },
          "\u0645\u0649": {
            "isolated": "\uFC49"
          },
          "\u0645\u064A": {
            "isolated": "\uFC4A"
          },
          "\u0646\u062C": {
            "isolated": "\uFC4B",
            "initial": "\uFCD2"
          },
          "\u0646\u062D": {
            "isolated": "\uFC4C",
            "initial": "\uFCD3"
          },
          "\u0646\u062E": {
            "isolated": "\uFC4D",
            "initial": "\uFCD4"
          },
          "\u0646\u0645": {
            "isolated": "\uFC4E",
            "final": "\uFC8C",
            "initial": "\uFCD5",
            "medial": "\uFCEE"
          },
          "\u0646\u0649": {
            "isolated": "\uFC4F",
            "final": "\uFC8E"
          },
          "\u0646\u064A": {
            "isolated": "\uFC50",
            "final": "\uFC8F"
          },
          "\u0647\u062C": {
            "isolated": "\uFC51",
            "initial": "\uFCD7"
          },
          "\u0647\u0645": {
            "isolated": "\uFC52",
            "initial": "\uFCD8"
          },
          "\u0647\u0649": {
            "isolated": "\uFC53"
          },
          "\u0647\u064A": {
            "isolated": "\uFC54"
          },
          "\u064A\u062C": {
            "isolated": "\uFC55",
            "initial": "\uFCDA"
          },
          "\u064A\u062D": {
            "isolated": "\uFC56",
            "initial": "\uFCDB"
          },
          "\u064A\u062E": {
            "isolated": "\uFC57",
            "initial": "\uFCDC"
          },
          "\u064A\u0645": {
            "isolated": "\uFC58",
            "final": "\uFC93",
            "initial": "\uFCDD",
            "medial": "\uFCF0"
          },
          "\u064A\u0649": {
            "isolated": "\uFC59",
            "final": "\uFC95"
          },
          "\u064A\u064A": {
            "isolated": "\uFC5A",
            "final": "\uFC96"
          },
          "\u0630\u0670": {
            "isolated": "\uFC5B"
          },
          "\u0631\u0670": {
            "isolated": "\uFC5C"
          },
          "\u0649\u0670": {
            "isolated": "\uFC5D",
            "final": "\uFC90"
          },
          "\u064C\u0651": {
            "isolated": "\uFC5E"
          },
          "\u064D\u0651": {
            "isolated": "\uFC5F"
          },
          "\u064E\u0651": {
            "isolated": "\uFC60"
          },
          "\u064F\u0651": {
            "isolated": "\uFC61"
          },
          "\u0650\u0651": {
            "isolated": "\uFC62"
          },
          "\u0651\u0670": {
            "isolated": "\uFC63"
          },
          "\u0626\u0631": {
            "final": "\uFC64"
          },
          "\u0626\u0632": {
            "final": "\uFC65"
          },
          "\u0626\u0646": {
            "final": "\uFC67"
          },
          "\u0628\u0631": {
            "final": "\uFC6A"
          },
          "\u0628\u0632": {
            "final": "\uFC6B"
          },
          "\u0628\u0646": {
            "final": "\uFC6D"
          },
          "\u062A\u0631": {
            "final": "\uFC70"
          },
          "\u062A\u0632": {
            "final": "\uFC71"
          },
          "\u062A\u0646": {
            "final": "\uFC73"
          },
          "\u062B\u0631": {
            "final": "\uFC76"
          },
          "\u062B\u0632": {
            "final": "\uFC77"
          },
          "\u062B\u0646": {
            "final": "\uFC79"
          },
          "\u062B\u064A": {
            "final": "\uFC7B"
          },
          "\u0645\u0627": {
            "final": "\uFC88"
          },
          "\u0646\u0631": {
            "final": "\uFC8A"
          },
          "\u0646\u0632": {
            "final": "\uFC8B"
          },
          "\u0646\u0646": {
            "final": "\uFC8D"
          },
          "\u064A\u0631": {
            "final": "\uFC91"
          },
          "\u064A\u0632": {
            "final": "\uFC92"
          },
          "\u064A\u0646": {
            "final": "\uFC94"
          },
          "\u0626\u062E": {
            "initial": "\uFC99"
          },
          "\u0626\u0647": {
            "initial": "\uFC9B",
            "medial": "\uFCE0"
          },
          "\u0628\u0647": {
            "initial": "\uFCA0",
            "medial": "\uFCE2"
          },
          "\u062A\u0647": {
            "initial": "\uFCA5",
            "medial": "\uFCE4"
          },
          "\u0635\u062E": {
            "initial": "\uFCB2"
          },
          "\u0644\u0647": {
            "initial": "\uFCCD"
          },
          "\u0646\u0647": {
            "initial": "\uFCD6",
            "medial": "\uFCEF"
          },
          "\u0647\u0670": {
            "initial": "\uFCD9"
          },
          "\u064A\u0647": {
            "initial": "\uFCDE",
            "medial": "\uFCF1"
          },
          "\u062B\u0647": {
            "medial": "\uFCE6"
          },
          "\u0633\u0647": {
            "medial": "\uFCE8",
            "initial": "\uFD31"
          },
          "\u0634\u0645": {
            "medial": "\uFCE9",
            "isolated": "\uFD0C",
            "final": "\uFD28",
            "initial": "\uFD30"
          },
          "\u0634\u0647": {
            "medial": "\uFCEA",
            "initial": "\uFD32"
          },
          "\u0640\u064E\u0651": {
            "medial": "\uFCF2"
          },
          "\u0640\u064F\u0651": {
            "medial": "\uFCF3"
          },
          "\u0640\u0650\u0651": {
            "medial": "\uFCF4"
          },
          "\u0637\u0649": {
            "isolated": "\uFCF5",
            "final": "\uFD11"
          },
          "\u0637\u064A": {
            "isolated": "\uFCF6",
            "final": "\uFD12"
          },
          "\u0639\u0649": {
            "isolated": "\uFCF7",
            "final": "\uFD13"
          },
          "\u0639\u064A": {
            "isolated": "\uFCF8",
            "final": "\uFD14"
          },
          "\u063A\u0649": {
            "isolated": "\uFCF9",
            "final": "\uFD15"
          },
          "\u063A\u064A": {
            "isolated": "\uFCFA",
            "final": "\uFD16"
          },
          "\u0633\u0649": {
            "isolated": "\uFCFB"
          },
          "\u0633\u064A": {
            "isolated": "\uFCFC",
            "final": "\uFD18"
          },
          "\u0634\u0649": {
            "isolated": "\uFCFD",
            "final": "\uFD19"
          },
          "\u0634\u064A": {
            "isolated": "\uFCFE",
            "final": "\uFD1A"
          },
          "\u062D\u0649": {
            "isolated": "\uFCFF",
            "final": "\uFD1B"
          },
          "\u062D\u064A": {
            "isolated": "\uFD00",
            "final": "\uFD1C"
          },
          "\u062C\u0649": {
            "isolated": "\uFD01",
            "final": "\uFD1D"
          },
          "\u062C\u064A": {
            "isolated": "\uFD02",
            "final": "\uFD1E"
          },
          "\u062E\u0649": {
            "isolated": "\uFD03",
            "final": "\uFD1F"
          },
          "\u062E\u064A": {
            "isolated": "\uFD04",
            "final": "\uFD20"
          },
          "\u0635\u0649": {
            "isolated": "\uFD05",
            "final": "\uFD21"
          },
          "\u0635\u064A": {
            "isolated": "\uFD06",
            "final": "\uFD22"
          },
          "\u0636\u0649": {
            "isolated": "\uFD07",
            "final": "\uFD23"
          },
          "\u0636\u064A": {
            "isolated": "\uFD08",
            "final": "\uFD24"
          },
          "\u0634\u062C": {
            "isolated": "\uFD09",
            "final": "\uFD25",
            "initial": "\uFD2D",
            "medial": "\uFD37"
          },
          "\u0634\u062D": {
            "isolated": "\uFD0A",
            "final": "\uFD26",
            "initial": "\uFD2E",
            "medial": "\uFD38"
          },
          "\u0634\u062E": {
            "isolated": "\uFD0B",
            "final": "\uFD27",
            "initial": "\uFD2F",
            "medial": "\uFD39"
          },
          "\u0634\u0631": {
            "isolated": "\uFD0D",
            "final": "\uFD29"
          },
          "\u0633\u0631": {
            "isolated": "\uFD0E",
            "final": "\uFD2A"
          },
          "\u0635\u0631": {
            "isolated": "\uFD0F",
            "final": "\uFD2B"
          },
          "\u0636\u0631": {
            "isolated": "\uFD10",
            "final": "\uFD2C"
          },
          "\u0633\u0639": {
            "final": "\uFD17"
          },
          "\u062A\u062C\u0645": {
            "initial": "\uFD50"
          },
          "\u062A\u062D\u062C": {
            "final": "\uFD51",
            "initial": "\uFD52"
          },
          "\u062A\u062D\u0645": {
            "initial": "\uFD53"
          },
          "\u062A\u062E\u0645": {
            "initial": "\uFD54"
          },
          "\u062A\u0645\u062C": {
            "initial": "\uFD55"
          },
          "\u062A\u0645\u062D": {
            "initial": "\uFD56"
          },
          "\u062A\u0645\u062E": {
            "initial": "\uFD57"
          },
          "\u062C\u0645\u062D": {
            "final": "\uFD58",
            "initial": "\uFD59"
          },
          "\u062D\u0645\u064A": {
            "final": "\uFD5A"
          },
          "\u062D\u0645\u0649": {
            "final": "\uFD5B"
          },
          "\u0633\u062D\u062C": {
            "initial": "\uFD5C"
          },
          "\u0633\u062C\u062D": {
            "initial": "\uFD5D"
          },
          "\u0633\u062C\u0649": {
            "final": "\uFD5E"
          },
          "\u0633\u0645\u062D": {
            "final": "\uFD5F",
            "initial": "\uFD60"
          },
          "\u0633\u0645\u062C": {
            "initial": "\uFD61"
          },
          "\u0633\u0645\u0645": {
            "final": "\uFD62",
            "initial": "\uFD63"
          },
          "\u0635\u062D\u062D": {
            "final": "\uFD64",
            "initial": "\uFD65"
          },
          "\u0635\u0645\u0645": {
            "final": "\uFD66",
            "initial": "\uFDC5"
          },
          "\u0634\u062D\u0645": {
            "final": "\uFD67",
            "initial": "\uFD68"
          },
          "\u0634\u062C\u064A": {
            "final": "\uFD69"
          },
          "\u0634\u0645\u062E": {
            "final": "\uFD6A",
            "initial": "\uFD6B"
          },
          "\u0634\u0645\u0645": {
            "final": "\uFD6C",
            "initial": "\uFD6D"
          },
          "\u0636\u062D\u0649": {
            "final": "\uFD6E"
          },
          "\u0636\u062E\u0645": {
            "final": "\uFD6F",
            "initial": "\uFD70"
          },
          "\u0636\u0645\u062D": {
            "final": "\uFD71"
          },
          "\u0637\u0645\u062D": {
            "initial": "\uFD72"
          },
          "\u0637\u0645\u0645": {
            "initial": "\uFD73"
          },
          "\u0637\u0645\u064A": {
            "final": "\uFD74"
          },
          "\u0639\u062C\u0645": {
            "final": "\uFD75",
            "initial": "\uFDC4"
          },
          "\u0639\u0645\u0645": {
            "final": "\uFD76",
            "initial": "\uFD77"
          },
          "\u0639\u0645\u0649": {
            "final": "\uFD78"
          },
          "\u063A\u0645\u0645": {
            "final": "\uFD79"
          },
          "\u063A\u0645\u064A": {
            "final": "\uFD7A"
          },
          "\u063A\u0645\u0649": {
            "final": "\uFD7B"
          },
          "\u0641\u062E\u0645": {
            "final": "\uFD7C",
            "initial": "\uFD7D"
          },
          "\u0642\u0645\u062D": {
            "final": "\uFD7E",
            "initial": "\uFDB4"
          },
          "\u0642\u0645\u0645": {
            "final": "\uFD7F"
          },
          "\u0644\u062D\u0645": {
            "final": "\uFD80",
            "initial": "\uFDB5"
          },
          "\u0644\u062D\u064A": {
            "final": "\uFD81"
          },
          "\u0644\u062D\u0649": {
            "final": "\uFD82"
          },
          "\u0644\u062C\u062C": {
            "initial": "\uFD83",
            "final": "\uFD84"
          },
          "\u0644\u062E\u0645": {
            "final": "\uFD85",
            "initial": "\uFD86"
          },
          "\u0644\u0645\u062D": {
            "final": "\uFD87",
            "initial": "\uFD88"
          },
          "\u0645\u062D\u062C": {
            "initial": "\uFD89"
          },
          "\u0645\u062D\u0645": {
            "initial": "\uFD8A"
          },
          "\u0645\u062D\u064A": {
            "final": "\uFD8B"
          },
          "\u0645\u062C\u062D": {
            "initial": "\uFD8C"
          },
          "\u0645\u062C\u0645": {
            "initial": "\uFD8D"
          },
          "\u0645\u062E\u062C": {
            "initial": "\uFD8E"
          },
          "\u0645\u062E\u0645": {
            "initial": "\uFD8F"
          },
          "\u0645\u062C\u062E": {
            "initial": "\uFD92"
          },
          "\u0647\u0645\u062C": {
            "initial": "\uFD93"
          },
          "\u0647\u0645\u0645": {
            "initial": "\uFD94"
          },
          "\u0646\u062D\u0645": {
            "initial": "\uFD95"
          },
          "\u0646\u062D\u0649": {
            "final": "\uFD96"
          },
          "\u0646\u062C\u0645": {
            "final": "\uFD97",
            "initial": "\uFD98"
          },
          "\u0646\u062C\u0649": {
            "final": "\uFD99"
          },
          "\u0646\u0645\u064A": {
            "final": "\uFD9A"
          },
          "\u0646\u0645\u0649": {
            "final": "\uFD9B"
          },
          "\u064A\u0645\u0645": {
            "final": "\uFD9C",
            "initial": "\uFD9D"
          },
          "\u0628\u062E\u064A": {
            "final": "\uFD9E"
          },
          "\u062A\u062C\u064A": {
            "final": "\uFD9F"
          },
          "\u062A\u062C\u0649": {
            "final": "\uFDA0"
          },
          "\u062A\u062E\u064A": {
            "final": "\uFDA1"
          },
          "\u062A\u062E\u0649": {
            "final": "\uFDA2"
          },
          "\u062A\u0645\u064A": {
            "final": "\uFDA3"
          },
          "\u062A\u0645\u0649": {
            "final": "\uFDA4"
          },
          "\u062C\u0645\u064A": {
            "final": "\uFDA5"
          },
          "\u062C\u062D\u0649": {
            "final": "\uFDA6"
          },
          "\u062C\u0645\u0649": {
            "final": "\uFDA7"
          },
          "\u0633\u062E\u0649": {
            "final": "\uFDA8"
          },
          "\u0635\u062D\u064A": {
            "final": "\uFDA9"
          },
          "\u0634\u062D\u064A": {
            "final": "\uFDAA"
          },
          "\u0636\u062D\u064A": {
            "final": "\uFDAB"
          },
          "\u0644\u062C\u064A": {
            "final": "\uFDAC"
          },
          "\u0644\u0645\u064A": {
            "final": "\uFDAD"
          },
          "\u064A\u062D\u064A": {
            "final": "\uFDAE"
          },
          "\u064A\u062C\u064A": {
            "final": "\uFDAF"
          },
          "\u064A\u0645\u064A": {
            "final": "\uFDB0"
          },
          "\u0645\u0645\u064A": {
            "final": "\uFDB1"
          },
          "\u0642\u0645\u064A": {
            "final": "\uFDB2"
          },
          "\u0646\u062D\u064A": {
            "final": "\uFDB3"
          },
          "\u0639\u0645\u064A": {
            "final": "\uFDB6"
          },
          "\u0643\u0645\u064A": {
            "final": "\uFDB7"
          },
          "\u0646\u062C\u062D": {
            "initial": "\uFDB8",
            "final": "\uFDBD"
          },
          "\u0645\u062E\u064A": {
            "final": "\uFDB9"
          },
          "\u0644\u062C\u0645": {
            "initial": "\uFDBA",
            "final": "\uFDBC"
          },
          "\u0643\u0645\u0645": {
            "final": "\uFDBB",
            "initial": "\uFDC3"
          },
          "\u062C\u062D\u064A": {
            "final": "\uFDBE"
          },
          "\u062D\u062C\u064A": {
            "final": "\uFDBF"
          },
          "\u0645\u062C\u064A": {
            "final": "\uFDC0"
          },
          "\u0641\u0645\u064A": {
            "final": "\uFDC1"
          },
          "\u0628\u062D\u064A": {
            "final": "\uFDC2"
          },
          "\u0633\u062E\u064A": {
            "final": "\uFDC6"
          },
          "\u0646\u062C\u064A": {
            "final": "\uFDC7"
          },
          "\u0644\u0622": {
            "isolated": "\uFEF5",
            "final": "\uFEF6"
          },
          "\u0644\u0623": {
            "isolated": "\uFEF7",
            "final": "\uFEF8"
          },
          "\u0644\u0625": {
            "isolated": "\uFEF9",
            "final": "\uFEFA"
          },
          "\u0644\u0627": {
            "isolated": "\uFEFB",
            "final": "\uFEFC"
          },
          "words": {
            "\u0635\u0644\u06D2": "\uFDF0",
            "\u0642\u0644\u06D2": "\uFDF1",
            "\u0627\u0644\u0644\u0647": "\uFDF2",
            "\u0627\u0643\u0628\u0631": "\uFDF3",
            "\u0645\u062D\u0645\u062F": "\uFDF4",
            "\u0635\u0644\u0639\u0645": "\uFDF5",
            "\u0631\u0633\u0648\u0644": "\uFDF6",
            "\u0639\u0644\u064A\u0647": "\uFDF7",
            "\u0648\u0633\u0644\u0645": "\uFDF8",
            "\u0635\u0644\u0649": "\uFDF9",
            "\u0635\u0644\u0649\u0627\u0644\u0644\u0647\u0639\u0644\u064A\u0647\u0648\u0633\u0644\u0645": "\uFDFA",
            "\u062C\u0644\u062C\u0644\u0627\u0644\u0647": "\uFDFB",
            "\u0631\u06CC\u0627\u0644": "\uFDFC"
          }
        };
        var _default$2 = ligatureReference;
        var unicodeLigatures = /*#__PURE__*/Object.defineProperty({
          "default": _default$2
        }, '__esModule', {
          value: true
        });

        var reference = createCommonjsModule(function (module, exports) {

          Object.defineProperty(exports, "__esModule", {
            value: true
          });
          var letterList = Object.keys(unicodeArabic["default"]);
          exports.letterList = letterList;
          var ligatureList = Object.keys(unicodeLigatures["default"]);
          exports.ligatureList = ligatureList;
          var ligatureWordList = Object.keys(unicodeLigatures["default"].words);
          exports.ligatureWordList = ligatureWordList;
          var lams = "\u0644\u06B5\u06B6\u06B7\u06B8";
          exports.lams = lams;
          var alefs = "\u0627\u0622\u0623\u0625\u0671\u0672\u0673\u0675\u0773\u0774";
          exports.alefs = alefs; // for (var l = 1; l < lams.length; l++) {
          //   console.log('-');
          //   for (var a = 0; a < alefs.length; a++) {
          //     console.log(a + ': ' + lams[l] + alefs[a]);
          //   }
          // }

          var tashkeel = "\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8";
          exports.tashkeel = tashkeel;

          function addToTashkeel(start, finish) {
            for (var i = start; i <= finish; i++) {
              exports.tashkeel = tashkeel += String.fromCharCode(i);
            }
          }

          addToTashkeel(0x0610, 0x061A);
          addToTashkeel(0x064B, 0x065F);
          addToTashkeel(0x06D6, 0x06DC);
          addToTashkeel(0x06E0, 0x06E4);
          addToTashkeel(0x06EA, 0x06ED);
          addToTashkeel(0x08D3, 0x08E1);
          addToTashkeel(0x08E3, 0x08FF);
          addToTashkeel(0xFE70, 0xFE7F);
          var lineBreakers = "\u0627\u0629\u0648\u06C0\u06CF\u06FD\u06FE\u076B\u076C\u0771\u0773\u0774\u0778\u0779\u08E2\u08B1\u08B2\u08B9";
          exports.lineBreakers = lineBreakers;

          function addToLineBreakers(start, finish) {
            for (var i = start; i <= finish; i++) {
              exports.lineBreakers = lineBreakers += String.fromCharCode(i);
            }
          }

          addToLineBreakers(0x0600, 0x061F); // it's OK to include tashkeel in this range as it is ignored

          addToLineBreakers(0x0621, 0x0625);
          addToLineBreakers(0x062F, 0x0632);
          addToLineBreakers(0x0660, 0x066D); // numerals, math

          addToLineBreakers(0x0671, 0x0677);
          addToLineBreakers(0x0688, 0x0699);
          addToLineBreakers(0x06C3, 0x06CB);
          addToLineBreakers(0x06D2, 0x06F9);
          addToLineBreakers(0x0759, 0x075B);
          addToLineBreakers(0x08AA, 0x08AE);
          addToLineBreakers(0xFB50, 0xFDFD); // presentation forms look like they could connect, but never do
          // Presentation Forms A includes diacritics but they are meant to stand alone

          addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
          // numerals, math

          addToLineBreakers(0x10E60, 0x10E7F);
          addToLineBreakers(0x1EC70, 0x1ECBF);
          addToLineBreakers(0x1EE00, 0x1EEFF);
        });

        function GlyphSplitter(word) {
          var letters = [];
          var lastLetter = '';
          word.split('').forEach(function (letter) {
            if (isArabic_1.isArabic(letter)) {
              if (reference.tashkeel.indexOf(letter) > -1) {
                letters[letters.length - 1] += letter;
              } else if (lastLetter.length && (reference.lams.indexOf(lastLetter) === 0 && reference.alefs.indexOf(letter) > -1 || reference.lams.indexOf(lastLetter) > 0 && reference.alefs.indexOf(letter) === 0)) {
                // valid LA forms
                letters[letters.length - 1] += letter;
              } else {
                letters.push(letter);
              }
            } else {
              letters.push(letter);
            }

            if (reference.tashkeel.indexOf(letter) === -1) {
              lastLetter = letter;
            }
          });
          return letters;
        }

        var GlyphSplitter_2 = GlyphSplitter;
        var GlyphSplitter_1 = /*#__PURE__*/Object.defineProperty({
          GlyphSplitter: GlyphSplitter_2
        }, '__esModule', {
          value: true
        });

        function BaselineSplitter(word) {
          var letters = [];
          var lastLetter = '';
          word.split('').forEach(function (letter) {
            if (isArabic_1.isArabic(letter) && isArabic_1.isArabic(lastLetter)) {
              if (lastLetter.length && reference.tashkeel.indexOf(letter) > -1) {
                letters[letters.length - 1] += letter;
              } else if (reference.lineBreakers.indexOf(lastLetter) > -1) {
                letters.push(letter);
              } else {
                letters[letters.length - 1] += letter;
              }
            } else {
              letters.push(letter);
            }

            if (reference.tashkeel.indexOf(letter) === -1) {
              // don't allow tashkeel to hide line break
              lastLetter = letter;
            }
          });
          return letters;
        }

        var BaselineSplitter_2 = BaselineSplitter;
        var BaselineSplitter_1 = /*#__PURE__*/Object.defineProperty({
          BaselineSplitter: BaselineSplitter_2
        }, '__esModule', {
          value: true
        });

        function Normal(word, breakPresentationForm) {
          // default is to turn initial/isolated/medial/final presentation form to generic
          if (typeof breakPresentationForm === 'undefined') {
            breakPresentationForm = true;
          }

          var returnable = '';
          word.split('').forEach(function (letter) {
            if (!isArabic_1.isArabic(letter)) {
              returnable += letter;
              return;
            }

            for (var w = 0; w < reference.letterList.length; w++) {
              // ok so we are checking this potential lettertron
              var letterForms = unicodeArabic["default"][reference.letterList[w]];
              var versions = Object.keys(letterForms);

              for (var v = 0; v < versions.length; v++) {
                var localVersion = letterForms[versions[v]];

                if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
                  // look at this embedded object
                  var embeddedForms = Object.keys(localVersion);

                  for (var ef = 0; ef < embeddedForms.length; ef++) {
                    var form = localVersion[embeddedForms[ef]];

                    if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
                      // match
                      // console.log('embedded match');
                      if (form === letter) {
                        // match exact
                        if (breakPresentationForm && localVersion['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(embeddedForms[ef]) > -1) {
                          // replace presentation form
                          // console.log('keeping normal form of the letter');
                          if (_typeof(localVersion['normal']) === 'object') {
                            returnable += localVersion['normal'][0];
                          } else {
                            returnable += localVersion['normal'];
                          }

                          return;
                        } // console.log('keeping this letter');


                        returnable += letter;
                        return;
                      } else if (_typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
                        // match
                        returnable += form[0]; // console.log('added the first letter from the same array');

                        return;
                      }
                    }
                  }
                } else if (localVersion === letter) {
                  // match exact
                  if (breakPresentationForm && letterForms['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(versions[v]) > -1) {
                    // replace presentation form
                    // console.log('keeping normal form of the letter');
                    if (_typeof(letterForms['normal']) === 'object') {
                      returnable += letterForms['normal'][0];
                    } else {
                      returnable += letterForms['normal'];
                    }

                    return;
                  } // console.log('keeping this letter');


                  returnable += letter;
                  return;
                } else if (_typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
                  // match
                  returnable += localVersion[0]; // console.log('added the first letter from the same array');

                  return;
                }
              }
            } // try ligatures


            for (var v2 = 0; v2 < reference.ligatureList.length; v2++) {
              var normalForm = reference.ligatureList[v2];

              if (normalForm !== 'words') {
                var ligForms = Object.keys(unicodeLigatures["default"][normalForm]);

                for (var f = 0; f < ligForms.length; f++) {
                  if (unicodeLigatures["default"][normalForm][ligForms[f]] === letter) {
                    returnable += normalForm;
                    return;
                  }
                }
              }
            } // try words ligatures


            for (var v3 = 0; v3 < reference.ligatureWordList.length; v3++) {
              var _normalForm = reference.ligatureWordList[v3];

              if (unicodeLigatures["default"].words[_normalForm] === letter) {
                returnable += _normalForm;
                return;
              }
            }

            returnable += letter; // console.log('kept the letter')
          });
          return returnable;
        }

        var Normal_1 = Normal;
        var Normalization = /*#__PURE__*/Object.defineProperty({
          Normal: Normal_1
        }, '__esModule', {
          value: true
        });

        function CharShaper(letter, form) {
          if (!isArabic_1.isArabic(letter)) {
            // fail not Arabic
            throw new Error('Not Arabic');
          }

          if (letter === "\u0621") {
            // hamza alone
            return "\u0621";
          }

          for (var w = 0; w < reference.letterList.length; w++) {
            // ok so we are checking this potential lettertron
            var letterForms = unicodeArabic["default"][reference.letterList[w]];
            var versions = Object.keys(letterForms);

            for (var v = 0; v < versions.length; v++) {
              var localVersion = letterForms[versions[v]];

              if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
                if (versions.indexOf(form) > -1) {
                  return letterForms[form];
                }
              } else if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
                // check embedded
                var embeddedVersions = Object.keys(localVersion);

                for (var ev = 0; ev < embeddedVersions.length; ev++) {
                  if (localVersion[embeddedVersions[ev]] === letter || _typeof(localVersion[embeddedVersions[ev]]) === 'object' && localVersion[embeddedVersions[ev]].indexOf && localVersion[embeddedVersions[ev]].indexOf(letter) > -1) {
                    if (embeddedVersions.indexOf(form) > -1) {
                      return localVersion[form];
                    }
                  }
                }
              }
            }
          }
        }

        var CharShaper_2 = CharShaper;
        var CharShaper_1 = /*#__PURE__*/Object.defineProperty({
          CharShaper: CharShaper_2
        }, '__esModule', {
          value: true
        });

        function WordShaper$1(word) {
          var state = 'initial';
          var output = '';

          for (var w = 0; w < word.length; w++) {
            var nextLetter = ' ';

            for (var nxw = w + 1; nxw < word.length; nxw++) {
              if (!isArabic_1.isArabic(word[nxw])) {
                break;
              }

              if (reference.tashkeel.indexOf(word[nxw]) === -1) {
                nextLetter = word[nxw];
                break;
              }
            }

            if (!isArabic_1.isArabic(word[w]) || isArabic_1.isMath(word[w])) {
              // space or other non-Arabic
              output += word[w];
              state = 'initial';
            } else if (reference.tashkeel.indexOf(word[w]) > -1) {
              // tashkeel - add without changing state
              output += word[w];
            } else if (nextLetter === ' ' || // last Arabic letter in this word
            reference.lineBreakers.indexOf(word[w]) > -1) {
              // the current letter is known to break lines
              output += CharShaper_1.CharShaper(word[w], state === 'initial' ? 'isolated' : 'final');
              state = 'initial';
            } else if (reference.lams.indexOf(word[w]) > -1 && reference.alefs.indexOf(nextLetter) > -1) {
              // LA letters - advance an additional letter after this
              output += unicodeLigatures["default"][word[w] + nextLetter][state === 'initial' ? 'isolated' : 'final'];

              while (word[w] !== nextLetter) {
                w++;
              }

              state = 'initial';
            } else {
              output += CharShaper_1.CharShaper(word[w], state);
              state = 'medial';
            }
          }

          return output;
        }

        var WordShaper_2 = WordShaper$1;
        var WordShaper_1 = /*#__PURE__*/Object.defineProperty({
          WordShaper: WordShaper_2
        }, '__esModule', {
          value: true
        });

        function ParentLetter(letter) {
          if (!isArabic_1.isArabic(letter)) {
            throw new Error('Not an Arabic letter');
          }

          for (var w = 0; w < reference.letterList.length; w++) {
            // ok so we are checking this potential lettertron
            var letterForms = unicodeArabic["default"][reference.letterList[w]];
            var versions = Object.keys(letterForms);

            for (var v = 0; v < versions.length; v++) {
              var localVersion = letterForms[versions[v]];

              if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
                // look at this embedded object
                var embeddedForms = Object.keys(localVersion);

                for (var ef = 0; ef < embeddedForms.length; ef++) {
                  var form = localVersion[embeddedForms[ef]];

                  if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
                    // match
                    return localVersion;
                  }
                }
              } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
                // match
                return letterForms;
              }
            }

            return null;
          }
        }

        var ParentLetter_2 = ParentLetter;

        function GrandparentLetter(letter) {
          if (!isArabic_1.isArabic(letter)) {
            throw new Error('Not an Arabic letter');
          }

          for (var w = 0; w < reference.letterList.length; w++) {
            // ok so we are checking this potential lettertron
            var letterForms = unicodeArabic["default"][reference.letterList[w]];
            var versions = Object.keys(letterForms);

            for (var v = 0; v < versions.length; v++) {
              var localVersion = letterForms[versions[v]];

              if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
                // look at this embedded object
                var embeddedForms = Object.keys(localVersion);

                for (var ef = 0; ef < embeddedForms.length; ef++) {
                  var form = localVersion[embeddedForms[ef]];

                  if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
                    // match
                    return letterForms;
                  }
                }
              } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
                // match
                return letterForms;
              }
            }

            return null;
          }
        }

        var GrandparentLetter_1 = GrandparentLetter;
        var ParentLetter_1 = /*#__PURE__*/Object.defineProperty({
          ParentLetter: ParentLetter_2,
          GrandparentLetter: GrandparentLetter_1
        }, '__esModule', {
          value: true
        });

        isArabic_1.isArabic;
        GlyphSplitter_1.GlyphSplitter;
        BaselineSplitter_1.BaselineSplitter;
        Normalization.Normal;
        CharShaper_1.CharShaper;
        var WordShaper = WordShaper_1.WordShaper;
        ParentLetter_1.ParentLetter;
        ParentLetter_1.GrandparentLetter;

        var rtlRegex = /[\u0590-\u05FF\u0600-\u06FF\u0750-\u07BF\u08A0–\u08BF]/;
        function fixRTLTextForSvg(inputText) {
          var ret = '',
              rtlBuffer = [];
          var arabicRegex = /[\u0600-\u06FF]/g;
          var arabicDiacritics = /[\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06ED]/g;
          var arabicMath = /[\u0660-\u066C\u06F0-\u06F9]+/g;
          var thaanaVowel = /[\u07A6-\u07B0]/;
          var hebrewSign = /[\u0591-\u05bd\u05bf\u05c1-\u05c5\u05c7]/; // Arabic word shaping

          if (arabicRegex.test(inputText)) {
            inputText = WordShaper(inputText);
          }

          for (var n = 0; n < inputText.length; n++) {
            var c = inputText[n];

            if (arabicMath.test(c)) {
              // Arabic numbers go LTR
              ret += rtlBuffer.reverse().join('');
              rtlBuffer = [c];
            } else {
              if (rtlBuffer.length && arabicMath.test(rtlBuffer[rtlBuffer.length - 1])) {
                ret += rtlBuffer.reverse().join('');
                rtlBuffer = [];
              }

              if ((thaanaVowel.test(c) || hebrewSign.test(c) || arabicDiacritics.test(c)) && rtlBuffer.length) {
                rtlBuffer[rtlBuffer.length - 1] += c;
              } else if (rtlRegex.test(c) // include Arabic presentation forms
              || c.charCodeAt(0) >= 64336 && c.charCodeAt(0) <= 65023 || c.charCodeAt(0) >= 65136 && c.charCodeAt(0) <= 65279) {
                rtlBuffer.push(c);
              } else if (c === ' ' && rtlBuffer.length) {
                // whitespace within RTL text
                rtlBuffer = [rtlBuffer.reverse().join('') + ' '];
              } else {
                // non-RTL character
                ret += rtlBuffer.reverse().join('') + c;
                rtlBuffer = [];
              }
            }
          }

          ret += rtlBuffer.reverse().join('');
          return ret;
        }

        var propertyIsEnumerable = objectPropertyIsEnumerable.f;

        // `Object.{ entries, values }` methods implementation
        var createMethod$1 = function (TO_ENTRIES) {
          return function (it) {
            var O = toIndexedObject(it);
            var keys = objectKeys(O);
            var length = keys.length;
            var i = 0;
            var result = [];
            var key;
            while (length > i) {
              key = keys[i++];
              if (!descriptors || propertyIsEnumerable.call(O, key)) {
                result.push(TO_ENTRIES ? [key, O[key]] : O[key]);
              }
            }
            return result;
          };
        };

        var objectToArray = {
          // `Object.entries` method
          // https://tc39.es/ecma262/#sec-object.entries
          entries: createMethod$1(true),
          // `Object.values` method
          // https://tc39.es/ecma262/#sec-object.values
          values: createMethod$1(false)
        };

        var $values = objectToArray.values;

        // `Object.values` method
        // https://tc39.es/ecma262/#sec-object.values
        _export({ target: 'Object', stat: true }, {
          values: function values(O) {
            return $values(O);
          }
        });

        // https://github.com/openstreetmap/iD/issues/772
        // http://mathiasbynens.be/notes/localstorage-pattern#comment-9
        var _storage;

        try {
          _storage = localStorage;
        } catch (e) {} // eslint-disable-line no-empty


        _storage = _storage || function () {
          var s = {};
          return {
            getItem: function getItem(k) {
              return s[k];
            },
            setItem: function setItem(k, v) {
              return s[k] = v;
            },
            removeItem: function removeItem(k) {
              return delete s[k];
            }
          };
        }(); //
        // corePreferences is an interface for persisting basic key-value strings
        // within and between iD sessions on the same site.
        //


        function corePreferences(k, v) {
          try {
            if (arguments.length === 1) return _storage.getItem(k);else if (v === null) _storage.removeItem(k);else _storage.setItem(k, v);
          } catch (e) {
            /* eslint-disable no-console */
            if (typeof console !== 'undefined') {
              console.error('localStorage quota exceeded');
            }
            /* eslint-enable no-console */

          }
        }

        var vparse = createCommonjsModule(function (module) {
          (function (window) {

            function parseVersion(v) {
              var m = v.replace(/[^0-9.]/g, '').match(/[0-9]*\.|[0-9]+/g) || [];
              v = {
                major: +m[0] || 0,
                minor: +m[1] || 0,
                patch: +m[2] || 0,
                build: +m[3] || 0
              };
              v.isEmpty = !v.major && !v.minor && !v.patch && !v.build;
              v.parsed = [v.major, v.minor, v.patch, v.build];
              v.text = v.parsed.join('.');
              v.compare = compare;
              return v;
            }

            function compare(v) {
              if (typeof v === 'string') {
                v = parseVersion(v);
              }

              for (var i = 0; i < 4; i++) {
                if (this.parsed[i] !== v.parsed[i]) {
                  return this.parsed[i] > v.parsed[i] ? 1 : -1;
                }
              }

              return 0;
            }
            /* istanbul ignore next */


            if (module && 'object' === 'object') {
              module.exports = parseVersion;
            } else {
              window.parseVersion = parseVersion;
            }
          })(commonjsGlobal);
        });

        var name = "iD";
        var version = "2.20.1";
        var description = "A friendly editor for OpenStreetMap";
        var main = "dist/iD.min.js";
        var repository = "github:openstreetmap/iD";
        var homepage = "https://github.com/openstreetmap/iD";
        var bugs = "https://github.com/openstreetmap/iD/issues";
        var keywords = ["editor","openstreetmap"];
        var license = "ISC";
        var scripts = {all:"npm-run-all -s clean build build:legacy dist",build:"npm-run-all -s build:css build:data build:dev","build:css":"node scripts/build_css.js","build:data":"shx mkdir -p dist/data && node scripts/build_data.js","build:dev":"rollup --config config/rollup.config.dev.js","build:legacy":"rollup --config config/rollup.config.legacy.js","build:stats":"rollup --config config/rollup.config.stats.js",clean:"shx rm -f dist/*.js dist/*.map dist/*.css dist/img/*.svg",dist:"npm-run-all -p dist:**","dist:mapillary":"shx mkdir -p dist/mapillary-js && shx cp -R node_modules/mapillary-js/dist/* dist/mapillary-js/","dist:pannellum":"shx mkdir -p dist/pannellum-streetside && shx cp -R node_modules/pannellum/build/* dist/pannellum-streetside/","dist:min:iD":"uglifyjs dist/iD.legacy.js --compress --mangle --output dist/iD.min.js","dist:svg:iD":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"iD-%s\" --symbol-sprite dist/img/iD-sprite.svg \"svg/iD-sprite/**/*.svg\"","dist:svg:community":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"community-%s\" --symbol-sprite dist/img/community-sprite.svg node_modules/osm-community-index/dist/img/*.svg","dist:svg:fa":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/fa-sprite.svg svg/fontawesome/*.svg","dist:svg:maki":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"maki-%s\" --symbol-sprite dist/img/maki-sprite.svg node_modules/@mapbox/maki/icons/*.svg","dist:svg:mapillary:signs":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/mapillary-sprite.svg node_modules/mapillary_sprite_source/package_signs/*.svg","dist:svg:mapillary:objects":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/mapillary-object-sprite.svg node_modules/mapillary_sprite_source/package_objects/*.svg","dist:svg:temaki":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"temaki-%s\" --symbol-sprite dist/img/temaki-sprite.svg node_modules/@ideditor/temaki/icons/*.svg",imagery:"node scripts/update_imagery.js",lint:"eslint scripts test/spec modules","lint:fix":"eslint scripts test/spec modules --fix",start:"npm-run-all -s build start:server",quickstart:"npm-run-all -s build:dev start:server","start:server":"node scripts/server.js",test:"npm-run-all -s lint build:css build:data build:legacy test:spec","test:spec":"phantomjs --web-security=no node_modules/mocha-phantomjs-core/mocha-phantomjs-core.js test/index.html spec",translations:"node scripts/update_locales.js"};
        var dependencies = {"@ideditor/country-coder":"~5.0.3","@ideditor/location-conflation":"~1.0.2","@mapbox/geojson-area":"^0.2.2","@mapbox/sexagesimal":"1.2.0","@mapbox/vector-tile":"^1.3.1","@tmcw/togeojson":"^4.5.0","@turf/bbox-clip":"^6.0.0","abortcontroller-polyfill":"^1.4.0","aes-js":"^3.1.2","alif-toolkit":"^1.2.9","core-js":"^3.6.5",diacritics:"1.3.0","fast-deep-equal":"~3.1.1","fast-json-stable-stringify":"2.1.0","lodash-es":"~4.17.15",marked:"~2.0.0","node-diff3":"2.1.0","osm-auth":"1.1.0",pannellum:"2.5.6",pbf:"^3.2.1","polygon-clipping":"~0.15.1",rbush:"3.0.1","whatwg-fetch":"^3.4.1","which-polygon":"2.2.0"};
        var devDependencies = {"@babel/core":"^7.11.6","@babel/preset-env":"^7.11.5","@fortawesome/fontawesome-svg-core":"^1.2.32","@fortawesome/free-brands-svg-icons":"~5.15.1","@fortawesome/free-regular-svg-icons":"~5.15.1","@fortawesome/free-solid-svg-icons":"~5.15.1","@ideditor/temaki":"~4.4.0","@mapbox/maki":"^6.0.0","@rollup/plugin-babel":"^5.2.1","@rollup/plugin-commonjs":"^17.0.0","@rollup/plugin-json":"^4.0.1","@rollup/plugin-node-resolve":"~11.2.0",autoprefixer:"^10.0.1",btoa:"^1.2.1",chai:"^4.1.0","cldr-core":"37.0.0","cldr-localenames-full":"37.0.0",colors:"^1.1.2","concat-files":"^0.1.1",d3:"~6.6.0","editor-layer-index":"github:osmlab/editor-layer-index#gh-pages",eslint:"^7.1.0",gaze:"^1.1.3",glob:"^7.1.0",happen:"^0.3.1","js-yaml":"^4.0.0","json-stringify-pretty-compact":"^3.0.0",mapillary_sprite_source:"^1.8.0","mapillary-js":"4.0.0",minimist:"^1.2.3",mocha:"^7.0.1","mocha-phantomjs-core":"^2.1.0","name-suggestion-index":"~6.0","node-fetch":"^2.6.1","npm-run-all":"^4.0.0","object-inspect":"1.10.3","osm-community-index":"~5.1.0","phantomjs-prebuilt":"~2.1.16",postcss:"^8.1.1","postcss-selector-prepend":"^0.5.0",rollup:"~2.52.8","rollup-plugin-includepaths":"~0.2.3","rollup-plugin-progress":"^1.1.1","rollup-plugin-visualizer":"~4.2.0",shelljs:"^0.8.0",shx:"^0.3.0",sinon:"7.5.0","sinon-chai":"^3.3.0",smash:"0.0","static-server":"^2.2.1","svg-sprite":"1.5.1","uglify-js":"~3.13.0",vparse:"~1.1.0"};
        var engines = {node:">=10"};
        var browserslist = ["> 0.2%, last 6 major versions, Firefox ESR, IE 11, maintained node versions"];
        var packageJSON = {
        name: name,
        version: version,
        description: description,
        main: main,
        repository: repository,
        homepage: homepage,
        bugs: bugs,
        keywords: keywords,
        license: license,
        scripts: scripts,
        dependencies: dependencies,
        devDependencies: devDependencies,
        engines: engines,
        browserslist: browserslist
        };

        var _mainFileFetcher = coreFileFetcher(); // singleton
        // coreFileFetcher asynchronously fetches data from JSON files
        //

        function coreFileFetcher() {
          var ociVersion = packageJSON.devDependencies['osm-community-index'];
          var v = vparse(ociVersion);
          var vMinor = "".concat(v.major, ".").concat(v.minor);
          var _this = {};
          var _inflight = {};
          var _fileMap = {
            'address_formats': 'data/address_formats.min.json',
            'deprecated': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/deprecated.min.json',
            'discarded': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/discarded.min.json',
            'imagery': 'data/imagery.min.json',
            'intro_graph': 'data/intro_graph.min.json',
            'keepRight': 'data/keepRight.min.json',
            'languages': 'data/languages.min.json',
            'locales': 'locales/index.min.json',
            'oci_defaults': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/defaults.min.json"),
            'oci_features': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/featureCollection.min.json"),
            'oci_resources': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/resources.min.json"),
            'preset_categories': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/preset_categories.min.json',
            'preset_defaults': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/preset_defaults.min.json',
            'preset_fields': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/fields.min.json',
            'preset_presets': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/presets.min.json',
            'phone_formats': 'data/phone_formats.min.json',
            'qa_data': 'data/qa_data.min.json',
            'shortcuts': 'data/shortcuts.min.json',
            'territory_languages': 'data/territory_languages.min.json',
            'wmf_sitematrix': 'https://cdn.jsdelivr.net/npm/wmf-sitematrix@0.1/wikipedia.min.json'
          };
          var _cachedData = {}; // expose the cache; useful for tests

          _this.cache = function () {
            return _cachedData;
          }; // Returns a Promise to fetch data
          // (resolved with the data if we have it already)


          _this.get = function (which) {
            if (_cachedData[which]) {
              return Promise.resolve(_cachedData[which]);
            }

            var file = _fileMap[which];

            var url = file && _this.asset(file);

            if (!url) {
              return Promise.reject("Unknown data file for \"".concat(which, "\""));
            }

            var prom = _inflight[url];

            if (!prom) {
              _inflight[url] = prom = utilFetchJson(url).then(function (result) {
                delete _inflight[url];

                if (!result) {
                  throw new Error("No data loaded for \"".concat(which, "\""));
                }

                _cachedData[which] = result;
                return result;
              })["catch"](function (err) {
                delete _inflight[url];
                throw err;
              });
            }

            return prom;
          }; // Accessor for the file map


          _this.fileMap = function (val) {
            if (!arguments.length) return _fileMap;
            _fileMap = val;
            return _this;
          };

          var _assetPath = '';

          _this.assetPath = function (val) {
            if (!arguments.length) return _assetPath;
            _assetPath = val;
            return _this;
          };

          var _assetMap = {};

          _this.assetMap = function (val) {
            if (!arguments.length) return _assetMap;
            _assetMap = val;
            return _this;
          };

          _this.asset = function (val) {
            if (/^http(s)?:\/\//i.test(val)) return val;
            var filename = _assetPath + val;
            return _assetMap[filename] || filename;
          };

          return _this;
        }

        var getOwnPropertyNames = objectGetOwnPropertyNames.f;
        var getOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
        var defineProperty = objectDefineProperty.f;
        var trim$2 = stringTrim.trim;

        var NUMBER = 'Number';
        var NativeNumber = global$2[NUMBER];
        var NumberPrototype = NativeNumber.prototype;

        // Opera ~12 has broken Object#toString
        var BROKEN_CLASSOF = classofRaw(objectCreate(NumberPrototype)) == NUMBER;

        // `ToNumber` abstract operation
        // https://tc39.es/ecma262/#sec-tonumber
        var toNumber$1 = function (argument) {
          var it = toPrimitive(argument, false);
          var first, third, radix, maxCode, digits, length, index, code;
          if (typeof it == 'string' && it.length > 2) {
            it = trim$2(it);
            first = it.charCodeAt(0);
            if (first === 43 || first === 45) {
              third = it.charCodeAt(2);
              if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix
            } else if (first === 48) {
              switch (it.charCodeAt(1)) {
                case 66: case 98: radix = 2; maxCode = 49; break; // fast equal of /^0b[01]+$/i
                case 79: case 111: radix = 8; maxCode = 55; break; // fast equal of /^0o[0-7]+$/i
                default: return +it;
              }
              digits = it.slice(2);
              length = digits.length;
              for (index = 0; index < length; index++) {
                code = digits.charCodeAt(index);
                // parseInt parses a string to a first unavailable symbol
                // but ToNumber should return NaN if a string contains unavailable symbols
                if (code < 48 || code > maxCode) return NaN;
              } return parseInt(digits, radix);
            }
          } return +it;
        };

        // `Number` constructor
        // https://tc39.es/ecma262/#sec-number-constructor
        if (isForced_1(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1'))) {
          var NumberWrapper = function Number(value) {
            var it = arguments.length < 1 ? 0 : value;
            var dummy = this;
            return dummy instanceof NumberWrapper
              // check on 1..constructor(foo) case
              && (BROKEN_CLASSOF ? fails(function () { NumberPrototype.valueOf.call(dummy); }) : classofRaw(dummy) != NUMBER)
                ? inheritIfRequired(new NativeNumber(toNumber$1(it)), dummy, NumberWrapper) : toNumber$1(it);
          };
          for (var keys = descriptors ? getOwnPropertyNames(NativeNumber) : (
            // ES3:
            'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +
            // ES2015 (in case, if modules with ES2015 Number statics required before):
            'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' +
            'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger,' +
            // ESNext
            'fromString,range'
          ).split(','), j = 0, key; keys.length > j; j++) {
            if (has$1(NativeNumber, key = keys[j]) && !has$1(NumberWrapper, key)) {
              defineProperty(NumberWrapper, key, getOwnPropertyDescriptor$2(NativeNumber, key));
            }
          }
          NumberWrapper.prototype = NumberPrototype;
          NumberPrototype.constructor = NumberWrapper;
          redefine(global$2, NUMBER, NumberWrapper);
        }

        // `thisNumberValue` abstract operation
        // https://tc39.es/ecma262/#sec-thisnumbervalue
        var thisNumberValue = function (value) {
          if (typeof value != 'number' && classofRaw(value) != 'Number') {
            throw TypeError('Incorrect invocation');
          }
          return +value;
        };

        // `String.prototype.repeat` method implementation
        // https://tc39.es/ecma262/#sec-string.prototype.repeat
        var stringRepeat = function repeat(count) {
          var str = String(requireObjectCoercible(this));
          var result = '';
          var n = toInteger(count);
          if (n < 0 || n == Infinity) throw RangeError('Wrong number of repetitions');
          for (;n > 0; (n >>>= 1) && (str += str)) if (n & 1) result += str;
          return result;
        };

        var nativeToFixed = 1.0.toFixed;
        var floor = Math.floor;

        var pow = function (x, n, acc) {
          return n === 0 ? acc : n % 2 === 1 ? pow(x, n - 1, acc * x) : pow(x * x, n / 2, acc);
        };

        var log = function (x) {
          var n = 0;
          var x2 = x;
          while (x2 >= 4096) {
            n += 12;
            x2 /= 4096;
          }
          while (x2 >= 2) {
            n += 1;
            x2 /= 2;
          } return n;
        };

        var multiply = function (data, n, c) {
          var index = -1;
          var c2 = c;
          while (++index < 6) {
            c2 += n * data[index];
            data[index] = c2 % 1e7;
            c2 = floor(c2 / 1e7);
          }
        };

        var divide = function (data, n) {
          var index = 6;
          var c = 0;
          while (--index >= 0) {
            c += data[index];
            data[index] = floor(c / n);
            c = (c % n) * 1e7;
          }
        };

        var dataToString = function (data) {
          var index = 6;
          var s = '';
          while (--index >= 0) {
            if (s !== '' || index === 0 || data[index] !== 0) {
              var t = String(data[index]);
              s = s === '' ? t : s + stringRepeat.call('0', 7 - t.length) + t;
            }
          } return s;
        };

        var FORCED$4 = nativeToFixed && (
          0.00008.toFixed(3) !== '0.000' ||
          0.9.toFixed(0) !== '1' ||
          1.255.toFixed(2) !== '1.25' ||
          1000000000000000128.0.toFixed(0) !== '1000000000000000128'
        ) || !fails(function () {
          // V8 ~ Android 4.3-
          nativeToFixed.call({});
        });

        // `Number.prototype.toFixed` method
        // https://tc39.es/ecma262/#sec-number.prototype.tofixed
        _export({ target: 'Number', proto: true, forced: FORCED$4 }, {
          toFixed: function toFixed(fractionDigits) {
            var number = thisNumberValue(this);
            var fractDigits = toInteger(fractionDigits);
            var data = [0, 0, 0, 0, 0, 0];
            var sign = '';
            var result = '0';
            var e, z, j, k;

            if (fractDigits < 0 || fractDigits > 20) throw RangeError('Incorrect fraction digits');
            // eslint-disable-next-line no-self-compare -- NaN check
            if (number != number) return 'NaN';
            if (number <= -1e21 || number >= 1e21) return String(number);
            if (number < 0) {
              sign = '-';
              number = -number;
            }
            if (number > 1e-21) {
              e = log(number * pow(2, 69, 1)) - 69;
              z = e < 0 ? number * pow(2, -e, 1) : number / pow(2, e, 1);
              z *= 0x10000000000000;
              e = 52 - e;
              if (e > 0) {
                multiply(data, 0, z);
                j = fractDigits;
                while (j >= 7) {
                  multiply(data, 1e7, 0);
                  j -= 7;
                }
                multiply(data, pow(10, j, 1), 0);
                j = e - 1;
                while (j >= 23) {
                  divide(data, 1 << 23);
                  j -= 23;
                }
                divide(data, 1 << j);
                multiply(data, 1, 1);
                divide(data, 2);
                result = dataToString(data);
              } else {
                multiply(data, 0, z);
                multiply(data, 1 << -e, 0);
                result = dataToString(data) + stringRepeat.call('0', fractDigits);
              }
            }
            if (fractDigits > 0) {
              k = result.length;
              result = sign + (k <= fractDigits
                ? '0.' + stringRepeat.call('0', fractDigits - k) + result
                : result.slice(0, k - fractDigits) + '.' + result.slice(k - fractDigits));
            } else {
              result = sign + result;
            } return result;
          }
        });

        var globalIsFinite = global$2.isFinite;

        // `Number.isFinite` method
        // https://tc39.es/ecma262/#sec-number.isfinite
        // eslint-disable-next-line es/no-number-isfinite -- safe
        var numberIsFinite = Number.isFinite || function isFinite(it) {
          return typeof it == 'number' && globalIsFinite(it);
        };

        // `Number.isFinite` method
        // https://tc39.es/ecma262/#sec-number.isfinite
        _export({ target: 'Number', stat: true }, { isFinite: numberIsFinite });

        var fromCharCode = String.fromCharCode;
        // eslint-disable-next-line es/no-string-fromcodepoint -- required for testing
        var $fromCodePoint = String.fromCodePoint;

        // length should be 1, old FF problem
        var INCORRECT_LENGTH = !!$fromCodePoint && $fromCodePoint.length != 1;

        // `String.fromCodePoint` method
        // https://tc39.es/ecma262/#sec-string.fromcodepoint
        _export({ target: 'String', stat: true, forced: INCORRECT_LENGTH }, {
          // eslint-disable-next-line no-unused-vars -- required for `.length`
          fromCodePoint: function fromCodePoint(x) {
            var elements = [];
            var length = arguments.length;
            var i = 0;
            var code;
            while (length > i) {
              code = +arguments[i++];
              if (toAbsoluteIndex(code, 0x10FFFF) !== code) throw RangeError(code + ' is not a valid code point');
              elements.push(code < 0x10000
                ? fromCharCode(code)
                : fromCharCode(((code -= 0x10000) >> 10) + 0xD800, code % 0x400 + 0xDC00)
              );
            } return elements.join('');
          }
        });

        // @@search logic
        fixRegexpWellKnownSymbolLogic('search', function (SEARCH, nativeSearch, maybeCallNative) {
          return [
            // `String.prototype.search` method
            // https://tc39.es/ecma262/#sec-string.prototype.search
            function search(regexp) {
              var O = requireObjectCoercible(this);
              var searcher = regexp == undefined ? undefined : regexp[SEARCH];
              return searcher !== undefined ? searcher.call(regexp, O) : new RegExp(regexp)[SEARCH](String(O));
            },
            // `RegExp.prototype[@@search]` method
            // https://tc39.es/ecma262/#sec-regexp.prototype-@@search
            function (string) {
              var res = maybeCallNative(nativeSearch, this, string);
              if (res.done) return res.value;

              var rx = anObject(this);
              var S = String(string);

              var previousLastIndex = rx.lastIndex;
              if (!sameValue(previousLastIndex, 0)) rx.lastIndex = 0;
              var result = regexpExecAbstract(rx, S);
              if (!sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;
              return result === null ? -1 : result.index;
            }
          ];
        });

        var quickselect$1 = createCommonjsModule(function (module, exports) {
          (function (global, factory) {
            module.exports = factory() ;
          })(commonjsGlobal, function () {

            function quickselect(arr, k, left, right, compare) {
              quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
            }

            function quickselectStep(arr, k, left, right, compare) {
              while (right > left) {
                if (right - left > 600) {
                  var n = right - left + 1;
                  var m = k - left + 1;
                  var z = Math.log(n);
                  var s = 0.5 * Math.exp(2 * z / 3);
                  var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
                  var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
                  var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
                  quickselectStep(arr, k, newLeft, newRight, compare);
                }

                var t = arr[k];
                var i = left;
                var j = right;
                swap(arr, left, k);
                if (compare(arr[right], t) > 0) swap(arr, left, right);

                while (i < j) {
                  swap(arr, i, j);
                  i++;
                  j--;

                  while (compare(arr[i], t) < 0) {
                    i++;
                  }

                  while (compare(arr[j], t) > 0) {
                    j--;
                  }
                }

                if (compare(arr[left], t) === 0) swap(arr, left, j);else {
                  j++;
                  swap(arr, j, right);
                }
                if (j <= k) left = j + 1;
                if (k <= j) right = j - 1;
              }
            }

            function swap(arr, i, j) {
              var tmp = arr[i];
              arr[i] = arr[j];
              arr[j] = tmp;
            }

            function defaultCompare(a, b) {
              return a < b ? -1 : a > b ? 1 : 0;
            }

            return quickselect;
          });
        });

        var rbush_1 = rbush;
        var _default$1 = rbush;

        function rbush(maxEntries, format) {
          if (!(this instanceof rbush)) return new rbush(maxEntries, format); // max entries in a node is 9 by default; min node fill is 40% for best performance

          this._maxEntries = Math.max(4, maxEntries || 9);
          this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));

          if (format) {
            this._initFormat(format);
          }

          this.clear();
        }

        rbush.prototype = {
          all: function all() {
            return this._all(this.data, []);
          },
          search: function search(bbox) {
            var node = this.data,
                result = [],
                toBBox = this.toBBox;
            if (!intersects$1(bbox, node)) return result;
            var nodesToSearch = [],
                i,
                len,
                child,
                childBBox;

            while (node) {
              for (i = 0, len = node.children.length; i < len; i++) {
                child = node.children[i];
                childBBox = node.leaf ? toBBox(child) : child;

                if (intersects$1(bbox, childBBox)) {
                  if (node.leaf) result.push(child);else if (contains$1(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
                }
              }

              node = nodesToSearch.pop();
            }

            return result;
          },
          collides: function collides(bbox) {
            var node = this.data,
                toBBox = this.toBBox;
            if (!intersects$1(bbox, node)) return false;
            var nodesToSearch = [],
                i,
                len,
                child,
                childBBox;

            while (node) {
              for (i = 0, len = node.children.length; i < len; i++) {
                child = node.children[i];
                childBBox = node.leaf ? toBBox(child) : child;

                if (intersects$1(bbox, childBBox)) {
                  if (node.leaf || contains$1(bbox, childBBox)) return true;
                  nodesToSearch.push(child);
                }
              }

              node = nodesToSearch.pop();
            }

            return false;
          },
          load: function load(data) {
            if (!(data && data.length)) return this;

            if (data.length < this._minEntries) {
              for (var i = 0, len = data.length; i < len; i++) {
                this.insert(data[i]);
              }

              return this;
            } // recursively build the tree with the given data from scratch using OMT algorithm


            var node = this._build(data.slice(), 0, data.length - 1, 0);

            if (!this.data.children.length) {
              // save as is if tree is empty
              this.data = node;
            } else if (this.data.height === node.height) {
              // split root if trees have the same height
              this._splitRoot(this.data, node);
            } else {
              if (this.data.height < node.height) {
                // swap trees if inserted one is bigger
                var tmpNode = this.data;
                this.data = node;
                node = tmpNode;
              } // insert the small tree into the large tree at appropriate level


              this._insert(node, this.data.height - node.height - 1, true);
            }

            return this;
          },
          insert: function insert(item) {
            if (item) this._insert(item, this.data.height - 1);
            return this;
          },
          clear: function clear() {
            this.data = createNode$1([]);
            return this;
          },
          remove: function remove(item, equalsFn) {
            if (!item) return this;
            var node = this.data,
                bbox = this.toBBox(item),
                path = [],
                indexes = [],
                i,
                parent,
                index,
                goingUp; // depth-first iterative tree traversal

            while (node || path.length) {
              if (!node) {
                // go up
                node = path.pop();
                parent = path[path.length - 1];
                i = indexes.pop();
                goingUp = true;
              }

              if (node.leaf) {
                // check current node
                index = findItem$1(item, node.children, equalsFn);

                if (index !== -1) {
                  // item found, remove the item and condense tree upwards
                  node.children.splice(index, 1);
                  path.push(node);

                  this._condense(path);

                  return this;
                }
              }

              if (!goingUp && !node.leaf && contains$1(node, bbox)) {
                // go down
                path.push(node);
                indexes.push(i);
                i = 0;
                parent = node;
                node = node.children[0];
              } else if (parent) {
                // go right
                i++;
                node = parent.children[i];
                goingUp = false;
              } else node = null; // nothing found

            }

            return this;
          },
          toBBox: function toBBox(item) {
            return item;
          },
          compareMinX: compareNodeMinX$1,
          compareMinY: compareNodeMinY$1,
          toJSON: function toJSON() {
            return this.data;
          },
          fromJSON: function fromJSON(data) {
            this.data = data;
            return this;
          },
          _all: function _all(node, result) {
            var nodesToSearch = [];

            while (node) {
              if (node.leaf) result.push.apply(result, node.children);else nodesToSearch.push.apply(nodesToSearch, node.children);
              node = nodesToSearch.pop();
            }

            return result;
          },
          _build: function _build(items, left, right, height) {
            var N = right - left + 1,
                M = this._maxEntries,
                node;

            if (N <= M) {
              // reached leaf level; return leaf
              node = createNode$1(items.slice(left, right + 1));
              calcBBox$1(node, this.toBBox);
              return node;
            }

            if (!height) {
              // target height of the bulk-loaded tree
              height = Math.ceil(Math.log(N) / Math.log(M)); // target number of root entries to maximize storage utilization

              M = Math.ceil(N / Math.pow(M, height - 1));
            }

            node = createNode$1([]);
            node.leaf = false;
            node.height = height; // split the items into M mostly square tiles

            var N2 = Math.ceil(N / M),
                N1 = N2 * Math.ceil(Math.sqrt(M)),
                i,
                j,
                right2,
                right3;
            multiSelect$1(items, left, right, N1, this.compareMinX);

            for (i = left; i <= right; i += N1) {
              right2 = Math.min(i + N1 - 1, right);
              multiSelect$1(items, i, right2, N2, this.compareMinY);

              for (j = i; j <= right2; j += N2) {
                right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively

                node.children.push(this._build(items, j, right3, height - 1));
              }
            }

            calcBBox$1(node, this.toBBox);
            return node;
          },
          _chooseSubtree: function _chooseSubtree(bbox, node, level, path) {
            var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;

            while (true) {
              path.push(node);
              if (node.leaf || path.length - 1 === level) break;
              minArea = minEnlargement = Infinity;

              for (i = 0, len = node.children.length; i < len; i++) {
                child = node.children[i];
                area = bboxArea$1(child);
                enlargement = enlargedArea$1(bbox, child) - area; // choose entry with the least area enlargement

                if (enlargement < minEnlargement) {
                  minEnlargement = enlargement;
                  minArea = area < minArea ? area : minArea;
                  targetNode = child;
                } else if (enlargement === minEnlargement) {
                  // otherwise choose one with the smallest area
                  if (area < minArea) {
                    minArea = area;
                    targetNode = child;
                  }
                }
              }

              node = targetNode || node.children[0];
            }

            return node;
          },
          _insert: function _insert(item, level, isNode) {
            var toBBox = this.toBBox,
                bbox = isNode ? item : toBBox(item),
                insertPath = []; // find the best node for accommodating the item, saving all nodes along the path too

            var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node


            node.children.push(item);
            extend$2(node, bbox); // split on node overflow; propagate upwards if necessary

            while (level >= 0) {
              if (insertPath[level].children.length > this._maxEntries) {
                this._split(insertPath, level);

                level--;
              } else break;
            } // adjust bboxes along the insertion path


            this._adjustParentBBoxes(bbox, insertPath, level);
          },
          // split overflowed node into two
          _split: function _split(insertPath, level) {
            var node = insertPath[level],
                M = node.children.length,
                m = this._minEntries;

            this._chooseSplitAxis(node, m, M);

            var splitIndex = this._chooseSplitIndex(node, m, M);

            var newNode = createNode$1(node.children.splice(splitIndex, node.children.length - splitIndex));
            newNode.height = node.height;
            newNode.leaf = node.leaf;
            calcBBox$1(node, this.toBBox);
            calcBBox$1(newNode, this.toBBox);
            if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
          },
          _splitRoot: function _splitRoot(node, newNode) {
            // split root node
            this.data = createNode$1([node, newNode]);
            this.data.height = node.height + 1;
            this.data.leaf = false;
            calcBBox$1(this.data, this.toBBox);
          },
          _chooseSplitIndex: function _chooseSplitIndex(node, m, M) {
            var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;
            minOverlap = minArea = Infinity;

            for (i = m; i <= M - m; i++) {
              bbox1 = distBBox$1(node, 0, i, this.toBBox);
              bbox2 = distBBox$1(node, i, M, this.toBBox);
              overlap = intersectionArea$1(bbox1, bbox2);
              area = bboxArea$1(bbox1) + bboxArea$1(bbox2); // choose distribution with minimum overlap

              if (overlap < minOverlap) {
                minOverlap = overlap;
                index = i;
                minArea = area < minArea ? area : minArea;
              } else if (overlap === minOverlap) {
                // otherwise choose distribution with minimum area
                if (area < minArea) {
                  minArea = area;
                  index = i;
                }
              }
            }

            return index;
          },
          // sorts node children by the best axis for split
          _chooseSplitAxis: function _chooseSplitAxis(node, m, M) {
            var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX$1,
                compareMinY = node.leaf ? this.compareMinY : compareNodeMinY$1,
                xMargin = this._allDistMargin(node, m, M, compareMinX),
                yMargin = this._allDistMargin(node, m, M, compareMinY); // if total distributions margin value is minimal for x, sort by minX,
            // otherwise it's already sorted by minY


            if (xMargin < yMargin) node.children.sort(compareMinX);
          },
          // total margin of all possible split distributions where each node is at least m full
          _allDistMargin: function _allDistMargin(node, m, M, compare) {
            node.children.sort(compare);
            var toBBox = this.toBBox,
                leftBBox = distBBox$1(node, 0, m, toBBox),
                rightBBox = distBBox$1(node, M - m, M, toBBox),
                margin = bboxMargin$1(leftBBox) + bboxMargin$1(rightBBox),
                i,
                child;

            for (i = m; i < M - m; i++) {
              child = node.children[i];
              extend$2(leftBBox, node.leaf ? toBBox(child) : child);
              margin += bboxMargin$1(leftBBox);
            }

            for (i = M - m - 1; i >= m; i--) {
              child = node.children[i];
              extend$2(rightBBox, node.leaf ? toBBox(child) : child);
              margin += bboxMargin$1(rightBBox);
            }

            return margin;
          },
          _adjustParentBBoxes: function _adjustParentBBoxes(bbox, path, level) {
            // adjust bboxes along the given tree path
            for (var i = level; i >= 0; i--) {
              extend$2(path[i], bbox);
            }
          },
          _condense: function _condense(path) {
            // go through the path, removing empty nodes and updating bboxes
            for (var i = path.length - 1, siblings; i >= 0; i--) {
              if (path[i].children.length === 0) {
                if (i > 0) {
                  siblings = path[i - 1].children;
                  siblings.splice(siblings.indexOf(path[i]), 1);
                } else this.clear();
              } else calcBBox$1(path[i], this.toBBox);
            }
          },
          _initFormat: function _initFormat(format) {
            // data format (minX, minY, maxX, maxY accessors)
            // uses eval-type function compilation instead of just accepting a toBBox function
            // because the algorithms are very sensitive to sorting functions performance,
            // so they should be dead simple and without inner calls
            var compareArr = ['return a', ' - b', ';'];
            this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));
            this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));
            this.toBBox = new Function('a', 'return {minX: a' + format[0] + ', minY: a' + format[1] + ', maxX: a' + format[2] + ', maxY: a' + format[3] + '};');
          }
        };

        function findItem$1(item, items, equalsFn) {
          if (!equalsFn) return items.indexOf(item);

          for (var i = 0; i < items.length; i++) {
            if (equalsFn(item, items[i])) return i;
          }

          return -1;
        } // calculate node's bbox from bboxes of its children


        function calcBBox$1(node, toBBox) {
          distBBox$1(node, 0, node.children.length, toBBox, node);
        } // min bounding rectangle of node children from k to p-1


        function distBBox$1(node, k, p, toBBox, destNode) {
          if (!destNode) destNode = createNode$1(null);
          destNode.minX = Infinity;
          destNode.minY = Infinity;
          destNode.maxX = -Infinity;
          destNode.maxY = -Infinity;

          for (var i = k, child; i < p; i++) {
            child = node.children[i];
            extend$2(destNode, node.leaf ? toBBox(child) : child);
          }

          return destNode;
        }

        function extend$2(a, b) {
          a.minX = Math.min(a.minX, b.minX);
          a.minY = Math.min(a.minY, b.minY);
          a.maxX = Math.max(a.maxX, b.maxX);
          a.maxY = Math.max(a.maxY, b.maxY);
          return a;
        }

        function compareNodeMinX$1(a, b) {
          return a.minX - b.minX;
        }

        function compareNodeMinY$1(a, b) {
          return a.minY - b.minY;
        }

        function bboxArea$1(a) {
          return (a.maxX - a.minX) * (a.maxY - a.minY);
        }

        function bboxMargin$1(a) {
          return a.maxX - a.minX + (a.maxY - a.minY);
        }

        function enlargedArea$1(a, b) {
          return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) * (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
        }

        function intersectionArea$1(a, b) {
          var minX = Math.max(a.minX, b.minX),
              minY = Math.max(a.minY, b.minY),
              maxX = Math.min(a.maxX, b.maxX),
              maxY = Math.min(a.maxY, b.maxY);
          return Math.max(0, maxX - minX) * Math.max(0, maxY - minY);
        }

        function contains$1(a, b) {
          return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
        }

        function intersects$1(a, b) {
          return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
        }

        function createNode$1(children) {
          return {
            children: children,
            height: 1,
            leaf: true,
            minX: Infinity,
            minY: Infinity,
            maxX: -Infinity,
            maxY: -Infinity
          };
        } // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
        // combines selection algorithm with binary divide & conquer approach


        function multiSelect$1(arr, left, right, n, compare) {
          var stack = [left, right],
              mid;

          while (stack.length) {
            right = stack.pop();
            left = stack.pop();
            if (right - left <= n) continue;
            mid = left + Math.ceil((right - left) / n / 2) * n;
            quickselect$1(arr, mid, left, right, compare);
            stack.push(left, mid, mid, right);
          }
        }
        rbush_1["default"] = _default$1;

        var lineclip_1 = lineclip$1;
        lineclip$1.polyline = lineclip$1;
        lineclip$1.polygon = polygonclip$1; // Cohen-Sutherland line clippign algorithm, adapted to efficiently
        // handle polylines rather than just segments

        function lineclip$1(points, bbox, result) {
          var len = points.length,
              codeA = bitCode$1(points[0], bbox),
              part = [],
              i,
              a,
              b,
              codeB,
              lastCode;
          if (!result) result = [];

          for (i = 1; i < len; i++) {
            a = points[i - 1];
            b = points[i];
            codeB = lastCode = bitCode$1(b, bbox);

            while (true) {
              if (!(codeA | codeB)) {
                // accept
                part.push(a);

                if (codeB !== lastCode) {
                  // segment went outside
                  part.push(b);

                  if (i < len - 1) {
                    // start a new line
                    result.push(part);
                    part = [];
                  }
                } else if (i === len - 1) {
                  part.push(b);
                }

                break;
              } else if (codeA & codeB) {
                // trivial reject
                break;
              } else if (codeA) {
                // a outside, intersect with clip edge
                a = intersect$1(a, b, codeA, bbox);
                codeA = bitCode$1(a, bbox);
              } else {
                // b outside
                b = intersect$1(a, b, codeB, bbox);
                codeB = bitCode$1(b, bbox);
              }
            }

            codeA = lastCode;
          }

          if (part.length) result.push(part);
          return result;
        } // Sutherland-Hodgeman polygon clipping algorithm


        function polygonclip$1(points, bbox) {
          var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle

          for (edge = 1; edge <= 8; edge *= 2) {
            result = [];
            prev = points[points.length - 1];
            prevInside = !(bitCode$1(prev, bbox) & edge);

            for (i = 0; i < points.length; i++) {
              p = points[i];
              inside = !(bitCode$1(p, bbox) & edge); // if segment goes through the clip window, add an intersection

              if (inside !== prevInside) result.push(intersect$1(prev, p, edge, bbox));
              if (inside) result.push(p); // add a point if it's inside

              prev = p;
              prevInside = inside;
            }

            points = result;
            if (!points.length) break;
          }

          return result;
        } // intersect a segment against one of the 4 lines that make up the bbox


        function intersect$1(a, b, edge, bbox) {
          return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
          edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
          edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
          edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
          null;
        } // bit code reflects the point position relative to the bbox:
        //         left  mid  right
        //    top  1001  1000  1010
        //    mid  0001  0000  0010
        // bottom  0101  0100  0110


        function bitCode$1(p, bbox) {
          var code = 0;
          if (p[0] < bbox[0]) code |= 1; // left
          else if (p[0] > bbox[2]) code |= 2; // right

          if (p[1] < bbox[1]) code |= 4; // bottom
          else if (p[1] > bbox[3]) code |= 8; // top

          return code;
        }

        var whichPolygon_1 = whichPolygon;

        function whichPolygon(data) {
          var bboxes = [];

          for (var i = 0; i < data.features.length; i++) {
            var feature = data.features[i];
            var coords = feature.geometry.coordinates;

            if (feature.geometry.type === 'Polygon') {
              bboxes.push(treeItem(coords, feature.properties));
            } else if (feature.geometry.type === 'MultiPolygon') {
              for (var j = 0; j < coords.length; j++) {
                bboxes.push(treeItem(coords[j], feature.properties));
              }
            }
          }

          var tree = rbush_1().load(bboxes);

          function query(p, multi) {
            var output = [],
                result = tree.search({
              minX: p[0],
              minY: p[1],
              maxX: p[0],
              maxY: p[1]
            });

            for (var i = 0; i < result.length; i++) {
              if (insidePolygon(result[i].coords, p)) {
                if (multi) output.push(result[i].props);else return result[i].props;
              }
            }

            return multi && output.length ? output : null;
          }

          query.tree = tree;

          query.bbox = function queryBBox(bbox) {
            var output = [];
            var result = tree.search({
              minX: bbox[0],
              minY: bbox[1],
              maxX: bbox[2],
              maxY: bbox[3]
            });

            for (var i = 0; i < result.length; i++) {
              if (polygonIntersectsBBox(result[i].coords, bbox)) {
                output.push(result[i].props);
              }
            }

            return output;
          };

          return query;
        }

        function polygonIntersectsBBox(polygon, bbox) {
          var bboxCenter = [(bbox[0] + bbox[2]) / 2, (bbox[1] + bbox[3]) / 2];
          if (insidePolygon(polygon, bboxCenter)) return true;

          for (var i = 0; i < polygon.length; i++) {
            if (lineclip_1(polygon[i], bbox).length > 0) return true;
          }

          return false;
        } // ray casting algorithm for detecting if point is in polygon


        function insidePolygon(rings, p) {
          var inside = false;

          for (var i = 0, len = rings.length; i < len; i++) {
            var ring = rings[i];

            for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
              if (rayIntersect(p, ring[j], ring[k])) inside = !inside;
            }
          }

          return inside;
        }

        function rayIntersect(p, p1, p2) {
          return p1[1] > p[1] !== p2[1] > p[1] && p[0] < (p2[0] - p1[0]) * (p[1] - p1[1]) / (p2[1] - p1[1]) + p1[0];
        }

        function treeItem(coords, props) {
          var item = {
            minX: Infinity,
            minY: Infinity,
            maxX: -Infinity,
            maxY: -Infinity,
            coords: coords,
            props: props
          };

          for (var i = 0; i < coords[0].length; i++) {
            var p = coords[0][i];
            item.minX = Math.min(item.minX, p[0]);
            item.minY = Math.min(item.minY, p[1]);
            item.maxX = Math.max(item.maxX, p[0]);
            item.maxY = Math.max(item.maxY, p[1]);
          }

          return item;
        }

        var type = "FeatureCollection";
        var features = [{
          type: "Feature",
          properties: {
            wikidata: "Q21",
            nameEn: "England",
            aliases: ["GB-ENG"],
            country: "GB",
            groups: ["Q23666", "Q3336843", "154", "150", "UN"],
            driveSide: "left",
            roadSpeedUnit: "mph",
            roadHeightUnit: "ft",
            callingCodes: ["44"]
          },
          geometry: {
            type: "MultiPolygon",
            coordinates: [[[[-6.03913, 51.13217], [-7.74976, 48.64773], [1.17405, 50.74239], [2.18458, 51.52087], [2.56575, 51.85301], [0.792, 57.56437], [-2.30613, 55.62698], [-2.17058, 55.45916], [-2.6095, 55.28488], [-2.63532, 55.19452], [-3.02906, 55.04606], [-3.09361, 54.94924], [-3.38407, 54.94278], [-4.1819, 54.57861], [-3.5082, 53.54318], [-3.08228, 53.25526], [-3.03675, 53.25092], [-2.92329, 53.19383], [-2.92022, 53.17685], [-2.98598, 53.15589], [-2.90649, 53.10964], [-2.87469, 53.12337], [-2.89131, 53.09374], [-2.83133, 52.99184], [-2.7251, 52.98389], [-2.72221, 52.92969], [-2.80549, 52.89428], [-2.85897, 52.94487], [-2.92401, 52.93836], [-2.97243, 52.9651], [-3.13576, 52.895], [-3.15744, 52.84947], [-3.16105, 52.79599], [-3.08734, 52.77504], [-3.01001, 52.76636], [-2.95581, 52.71794], [-3.01724, 52.72083], [-3.04398, 52.65435], [-3.13648, 52.58208], [-3.12926, 52.5286], [-3.09746, 52.53077], [-3.08662, 52.54811], [-3.00929, 52.57774], [-2.99701, 52.551], [-3.03603, 52.49969], [-3.13359, 52.49174], [-3.22971, 52.45344], [-3.22754, 52.42526], [-3.04687, 52.34504], [-2.95364, 52.3501], [-2.99701, 52.323], [-3.00785, 52.2753], [-3.09289, 52.20546], [-3.12638, 52.08114], [-2.97111, 51.90456], [-2.8818, 51.93196], [-2.78742, 51.88833], [-2.74277, 51.84367], [-2.66234, 51.83555], [-2.66336, 51.59504], [-3.20563, 51.31615], [-6.03913, 51.13217]]]]
          }
        }, {
          type: "Feature",
          properties: {
            wikidata: "Q22",
            nameEn: "Scotland",
            aliases: ["GB-SCT"],
            country: "GB",
            groups: ["Q23666", "Q3336843", "154", "150", "UN"],
            driveSide: "left",
            roadSpeedUnit: "mph",
            roadHeightUnit: "ft",
            callingCodes: ["44"]
          },
          geometry: {
            type: "MultiPolygon",
            coordinates: [[[[0.792, 57.56437], [-0.3751, 61.32236], [-14.78497, 57.60709], [-6.82333, 55.83103], [-4.69044, 54.3629], [-3.38407, 54.94278], [-3.09361, 54.94924], [-3.02906, 55.04606], [-2.63532, 55.19452], [-2.6095, 55.28488], [-2.17058, 55.45916], [-2.30613, 55.62698], [0.792, 57.56437]]]]
          }
        }, {
          type: "Feature",
          properties: {
            wikidata: "Q25",
            nameEn: "Wales",
            aliases: ["GB-WLS"],
            country: "GB",
            groups: ["Q23666", "Q3336843", "154", "150", "UN"],
            driveSide: "left",
            roadSpeedUnit: "mph",
            roadHeightUnit: "ft",
            callingCodes: ["44"]
          },
          geometry: {
            type: "MultiPolygon",
            coordinates: [[[[-3.5082, 53.54318], [-5.37267, 53.63269], [-6.03913, 51.13217], [-3.20563, 51.31615], [-2.66336, 51.59504], [-2.66234, 51.83555], [-2.74277, 51.84367], [-2.78742, 51.88833], [-2.8818, 51.93196], [-2.97111, 51.90456], [-3.12638, 52.08114], [-3.09289, 52.20546], [-3.00785, 52.2753], [-2.99701, 52.323], [-2.95364, 52.3501], [-3.04687, 52.34504], [-3.22754, 52.42526], [-3.22971, 52.45344], [-3.13359, 52.49174], [-3.03603, 52.49969], [-2.99701, 52.551], [-3.00929, 52.57774], [-3.08662, 52.54811], [-3.09746, 52.53077], [-3.12926, 52.5286], [-3.13648, 52.58208], [-3.04398, 52.65435], [-3.01724, 52.72083], [-2.95581, 52.71794], [-3.01001, 52.76636], [-3.08734, 52.77504], [-3.16105, 52.79599], [-3.15744, 52.84947], [-3.13576, 52.895], [-2.97243, 52.9651], [-2.92401, 52.93836], [-2.85897, 52.94487], [-2.80549, 52.89428], [-2.72221, 52.92969], [-2.7251, 52.98389], [-2.83133, 52.99184], [-2.89131, 53.09374], [-2.87469, 53.12337], [-2.90649, 53.10964], [-2.98598, 53.15589], [-2.92022, 53.17685], [-2.92329, 53.19383], [-3.03675, 53.25092], [-3.08228, 53.25526], [-3.5082, 53.54318]]]]
          }
        }, {
          type: "Feature",
          properties: {
            wikidata: "Q26",
            nameEn: "Northern Ireland",
            aliases: ["GB-NIR"],
            country: "GB",
            groups: ["Q22890", "Q3336843", "154", "150", "UN"],
            driveSide: "left",
            roadSpeedUnit: "mph",
            roadHeightUnit: "ft",
            callingCodes: ["44"]
          },
          geometry: {
            type: "MultiPolygon",
            coordinates: [[[[-6.34755, 55.49206], [-7.2471, 55.06933], [-7.34464, 55.04688], [-7.4033, 55.00391], [-7.40004, 54.94498], [-7.44404, 54.9403], [-7.4473, 54.87003], [-7.47626, 54.83084], [-7.54508, 54.79401], [-7.54671, 54.74606], [-7.64449, 54.75265], [-7.75041, 54.7103], [-7.83352, 54.73854], [-7.93293, 54.66603], [-7.70315, 54.62077], [-7.8596, 54.53671], [-7.99812, 54.54427], [-8.04538, 54.48941], [-8.179, 54.46763], [-8.04555, 54.36292], [-7.87101, 54.29299], [-7.8596, 54.21779], [-7.81397, 54.20159], [-7.69501, 54.20731], [-7.55812, 54.12239], [-7.4799, 54.12239], [-7.44567, 54.1539], [-7.32834, 54.11475], [-7.30553, 54.11869], [-7.34005, 54.14698], [-7.29157, 54.17191], [-7.28017, 54.16714], [-7.29687, 54.1354], [-7.29493, 54.12013], [-7.26316, 54.13863], [-7.25012, 54.20063], [-7.14908, 54.22732], [-7.19145, 54.31296], [-7.02034, 54.4212], [-6.87775, 54.34682], [-6.85179, 54.29176], [-6.81583, 54.22791], [-6.74575, 54.18788], [-6.70175, 54.20218], [-6.6382, 54.17071], [-6.66264, 54.0666], [-6.62842, 54.03503], [-6.47849, 54.06947], [-6.36605, 54.07234], [-6.36279, 54.11248], [-6.32694, 54.09337], [-6.29003, 54.11278], [-6.26218, 54.09785], [-5.83481, 53.87749], [-4.69044, 54.3629], [-6.34755, 55.49206]]]]
          }
        }, {
          type: "Feature",
          properties: {
            wikidata: "Q35",
            nameEn: "Denmark",
            country: "DK",
            groups: ["EU", "154", "150", "UN"],
            callingCodes: ["45"]
          },
          geometry: {
            type: "MultiPolygon",
            coordinates: [[[[12.16597, 56.60205], [10.40861, 58.38489], [7.28637, 57.35913], [8.02459, 55.09613], [8.45719, 55.06747], [8.55769, 54.91837], [8.63979, 54.91069], [8.76387, 54.8948], [8.81178, 54.90518], [8.92795, 54.90452], [9.04629, 54.87249], [9.14275, 54.87421], [9.20571, 54.85841], [9.24631, 54.84726], [9.23445, 54.83432], [9.2474, 54.8112], [9.32771, 54.80602], [9.33849, 54.80233], [9.36496, 54.81749], [9.38532, 54.83968], [9.41213, 54.84254], [9.43155, 54.82586], [9.4659, 54.83131], [9.58937, 54.88785], [9.62734, 54.88057], [9.61187, 54.85548], [9.73563, 54.8247], [9.89314, 54.84171], [10.16755, 54.73883], [10.31111, 54.65968], [11.00303, 54.63689], [11.90309, 54.38543], [12.85844, 54.82438], [13.93395, 54.84044], [15.36991, 54.73263], [15.79951, 55.54655], [14.89259, 55.5623], [14.28399, 55.1553], [12.84405, 55.13257], [12.60345, 55.42675], [12.88472, 55.63369], [12.6372, 55.91371], [12.65312, 56.04345], [12.07466, 56.29488], [12.16597, 56.60205]]]]
          }
        }, {
          type: "Feature",
          properties: {
            wikidata: "Q55",
            nameEn: "Netherlands",
            country: "NL",
            groups: ["EU", "155", "150", "UN"],
            callingCodes: ["31"]
          },
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            coordinates: [[[[32.95389, -9.40138], [32.76233, -9.31963], [32.75611, -9.28583], [32.53661, -9.24281], [32.49147, -9.14754], [32.43543, -9.11988], [32.25486, -9.13371], [32.16146, -9.05993], [32.08206, -9.04609], [31.98866, -9.07069], [31.94196, -9.02303], [31.94663, -8.93846], [31.81587, -8.88618], [31.71158, -8.91386], [31.57147, -8.81388], [31.57147, -8.70619], [31.37533, -8.60769], [31.00796, -8.58615], [30.79243, -8.27382], [28.88917, -8.4831], [28.9711, -8.66935], [28.38526, -9.23393], [28.36562, -9.30091], [28.52636, -9.35379], [28.51627, -9.44726], [28.56208, -9.49122], [28.68532, -9.78], [28.62795, -9.92942], [28.65032, -10.65133], [28.37241, -11.57848], [28.48357, -11.87532], [29.18592, -12.37921], [29.4992, -12.43843], [29.48404, -12.23604], [29.8139, -12.14898], [29.81551, -13.44683], [29.65078, -13.41844], [29.60531, -13.21685], [29.01918, -13.41353], [28.33199, -12.41375], [27.59932, -12.22123], [27.21025, -11.76157], [27.22541, -11.60323], [27.04351, -11.61312], [26.88687, -12.01868], [26.01777, -11.91488], [25.33058, -11.65767], [25.34069, -11.19707], [24.42612, -11.44975], [24.34528, -11.06816], [24.00027, -10.89356], [24.02603, -11.15368], [23.98804, -12.13149], [24.06672, -12.29058], [23.90937, -12.844], [24.03339, -12.99091], [21.97988, -13.00148], [22.00323, -16.18028], [22.17217, -16.50269], [23.20038, -17.47563], [23.47474, -17.62877], [24.23619, -17.47489], [24.32811, -17.49082], [24.38712, -17.46818], [24.5621, -17.52963], [24.70864, -17.49501], [25.00198, -17.58221], [25.26433, -17.79571], [25.51646, -17.86232], [25.6827, -17.81987], [25.85738, -17.91403], [25.85892, -17.97726], [26.08925, -17.98168], [26.0908, -17.93021], [26.21601, -17.88608], [26.55918, -17.99638], [26.68403, -18.07411], [26.74314, -18.0199], [26.89926, -17.98756], [27.14196, -17.81398], [27.30736, -17.60487], [27.61377, -17.34378], [27.62795, -17.24365], [27.83141, -16.96274], [28.73725, -16.5528], [28.76199, -16.51575], [28.81454, -16.48611], [28.8501, -16.04537], [28.9243, -15.93987], [29.01298, -15.93805], [29.21955, -15.76589], [29.4437, -15.68702], [29.8317, -15.6126], [30.35574, -15.6513], [30.41902, -15.62269], [30.22098, -14.99447], [33.24249, -14.00019], [33.16749, -13.93992], [33.07568, -13.98447], [33.02977, -14.05022], [32.99042, -13.95689], [32.88985, -13.82956], [32.79015, -13.80755], [32.76962, -13.77224], [32.84528, -13.71576], [32.7828, -13.64805], [32.68654, -13.64268], [32.66468, -13.60019], [32.68436, -13.55769], [32.73683, -13.57682], [32.84176, -13.52794], [32.86113, -13.47292], [33.0078, -13.19492], [32.98289, -13.12671], [33.02181, -12.88707], [32.96733, -12.88251], [32.94397, -12.76868], [33.05917, -12.59554], [33.18837, -12.61377], [33.28177, -12.54692], [33.37517, -12.54085], [33.54485, -12.35996], [33.47636, -12.32498], [33.3705, -12.34931], [33.25998, -12.14242], [33.33937, -11.91252], [33.32692, -11.59248], [33.24252, -11.59302], [33.23663, -11.40637], [33.29267, -11.43536], [33.29267, -11.3789], [33.39697, -11.15296], [33.25998, -10.88862], [33.28022, -10.84428], [33.47636, -10.78465], [33.70675, -10.56896], [33.54797, -10.36077], [33.53863, -10.20148], [33.31297, -10.05133], [33.37902, -9.9104], [33.36581, -9.81063], [33.31517, -9.82364], [33.2095, -9.61099], [33.12144, -9.58929], [33.10163, -9.66525], [33.05485, -9.61316], [33.00256, -9.63053], [33.00476, -9.5133], [32.95389, -9.40138]]]]
          }
        }, {
          type: "Feature",
          properties: {
            iso1A2: "ZW",
            iso1A3: "ZWE",
            iso1N3: "716",
            wikidata: "Q954",
            nameEn: "Zimbabwe",
            groups: ["014", "202", "002", "UN"],
            driveSide: "left",
            callingCodes: ["263"]
          },
          geometry: {
            type: "MultiPolygon",
            coordinates: [[[[30.41902, -15.62269], [30.35574, -15.6513], [29.8317, -15.6126], [29.4437, -15.68702], [29.21955, -15.76589], [29.01298, -15.93805], [28.9243, -15.93987], [28.8501, -16.04537], [28.81454, -16.48611], [28.76199, -16.51575], [28.73725, -16.5528], [27.83141, -16.96274], [27.62795, -17.24365], [27.61377, -17.34378], [27.30736, -17.60487], [27.14196, -17.81398], [26.89926, -17.98756], [26.74314, -18.0199], [26.68403, -18.07411], [26.55918, -17.99638], [26.21601, -17.88608], [26.0908, -17.93021], [26.08925, -17.98168], [25.85892, -17.97726], [25.85738, -17.91403], [25.6827, -17.81987], [25.51646, -17.86232], [25.26433, -17.79571], [25.23909, -17.90832], [25.31799, -18.07091], [25.39972, -18.12691], [25.53465, -18.39041], [25.68859, -18.56165], [25.79217, -18.6355], [25.82353, -18.82808], [25.94326, -18.90362], [25.99837, -19.02943], [25.96226, -19.08152], [26.17227, -19.53709], [26.72246, -19.92707], [27.21278, -20.08244], [27.29831, -20.28935], [27.28865, -20.49873], [27.69361, -20.48531], [27.72972, -20.51735], [27.69171, -21.08409], [27.91407, -21.31621], [28.01669, -21.57624], [28.29416, -21.59037], [28.49942, -21.66634], [28.58114, -21.63455], [29.07763, -21.81877], [29.04023, -21.85864], [29.02191, -21.90647], [29.02191, -21.95665], [29.04108, -22.00563], [29.08495, -22.04867], [29.14501, -22.07275], [29.1974, -22.07472], [29.24648, -22.05967], [29.3533, -22.18363], [29.37703, -22.19581], [29.64609, -22.12917], [29.76848, -22.14128], [29.92242, -22.19408], [30.13147, -22.30841], [30.2265, -22.2961], [30.28351, -22.35587], [30.38614, -22.34533], [30.48686, -22.31368], [30.6294, -22.32599], [30.86696, -22.28907], [31.08932, -22.34884], [31.16344, -22.32599], [31.30611, -22.422], [31.38336, -22.36919], [32.41234, -21.31246], [32.48236, -21.32873], [32.37115, -21.133], [32.51644, -20.91929], [32.48122, -20.63319], [32.55167, -20.56312], [32.66174, -20.56106], [32.85987, -20.27841], [32.85987, -20.16686], [32.93032, -20.03868], [33.01178, -20.02007], [33.06461, -19.77787], [32.95013, -19.67219], [32.84666, -19.68462], [32.84446, -19.48343], [32.78282, -19.47513], [32.77966, -19.36098], [32.85107, -19.29238], [32.87088, -19.09279], [32.84006, -19.0262], [32.72118, -19.02204], [32.69917, -18.94293], [32.73439, -18.92628], [32.70137, -18.84712], [32.82465, -18.77419], [32.9017, -18.7992], [32.95013, -18.69079], [32.88629, -18.58023], [32.88629, -18.51344], [33.02278, -18.4696], [33.03159, -18.35054], [32.94133, -17.99705], [33.0492, -17.60298], [32.98536, -17.55891], [32.96554, -17.48964], [33.0426, -17.3468], [33.00517, -17.30477], [32.96554, -17.11971], [32.84113, -16.92259], [32.91051, -16.89446], [32.97655, -16.70689], [32.78943, -16.70267], [32.69917, -16.66893], [32.71017, -16.59932], [32.42838, -16.4727], [32.28529, -16.43892], [32.02772, -16.43892], [31.91324, -16.41569], [31.90223, -16.34388], [31.67988, -16.19595], [31.42451, -16.15154], [31.30563, -16.01193], [31.13171, -15.98019], [30.97761, -16.05848], [30.91597, -15.99924], [30.42568, -15.9962], [30.41902, -15.62269]]]]
          }
        }];
        var borders_default = {
          type: type,
          features: features
        }; // src/country-coder.ts

        var borders = borders_default;
        var whichPolygonGetter = {};
        var featuresByCode = {};
        var idFilterRegex = /(?=(?!^(and|the|of|el|la|de)$))(\b(and|the|of|el|la|de)\b)|[-_ .,'()&[\]/]/gi;

        function canonicalID(id) {
          var s = id || "";

          if (s.charAt(0) === ".") {
            return s.toUpperCase();
          } else {
            return s.replace(idFilterRegex, "").toUpperCase();
          }
        }

        var levels = ["subterritory", "territory", "subcountryGroup", "country", "sharedLandform", "intermediateRegion", "subregion", "region", "subunion", "union", "unitedNations", "world"];
        loadDerivedDataAndCaches(borders);

        function loadDerivedDataAndCaches(borders2) {
          var identifierProps = ["iso1A2", "iso1A3", "m49", "wikidata", "emojiFlag", "ccTLD", "nameEn"];
          var geometryFeatures = [];

          for (var i in borders2.features) {
            var feature2 = borders2.features[i];
            feature2.properties.id = feature2.properties.iso1A2 || feature2.properties.m49 || feature2.properties.wikidata;
            loadM49(feature2);
            loadTLD(feature2);
            loadIsoStatus(feature2);
            loadLevel(feature2);
            loadGroups(feature2);
            loadFlag(feature2);
            cacheFeatureByIDs(feature2);
            if (feature2.geometry) geometryFeatures.push(feature2);
          }

          for (var _i in borders2.features) {
            var _feature = borders2.features[_i];
            _feature.properties.groups = _feature.properties.groups.map(function (groupID) {
              return featuresByCode[groupID].properties.id;
            });
            loadMembersForGroupsOf(_feature);
          }

          for (var _i2 in borders2.features) {
            var _feature2 = borders2.features[_i2];
            loadRoadSpeedUnit(_feature2);
            loadRoadHeightUnit(_feature2);
            loadDriveSide(_feature2);
            loadCallingCodes(_feature2);
            loadGroupGroups(_feature2);
          }

          for (var _i3 in borders2.features) {
            var _feature3 = borders2.features[_i3];

            _feature3.properties.groups.sort(function (groupID1, groupID2) {
              return levels.indexOf(featuresByCode[groupID1].properties.level) - levels.indexOf(featuresByCode[groupID2].properties.level);
            });

            if (_feature3.properties.members) _feature3.properties.members.sort(function (id1, id2) {
              var diff = levels.indexOf(featuresByCode[id1].properties.level) - levels.indexOf(featuresByCode[id2].properties.level);

              if (diff === 0) {
                return borders2.features.indexOf(featuresByCode[id1]) - borders2.features.indexOf(featuresByCode[id2]);
              }

              return diff;
            });
          }

          var geometryOnlyCollection = {
            type: "FeatureCollection",
            features: geometryFeatures
          };
          whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);

          function loadGroups(feature2) {
            var props = feature2.properties;

            if (!props.groups) {
              props.groups = [];
            }

            if (feature2.geometry && props.country) {
              props.groups.push(props.country);
            }

            if (props.m49 !== "001") {
              props.groups.push("001");
            }
          }

          function loadM49(feature2) {
            var props = feature2.properties;

            if (!props.m49 && props.iso1N3) {
              props.m49 = props.iso1N3;
            }
          }

          function loadTLD(feature2) {
            var props = feature2.properties;
            if (props.level === "unitedNations") return;

            if (!props.ccTLD && props.iso1A2) {
              props.ccTLD = "." + props.iso1A2.toLowerCase();
            }
          }

          function loadIsoStatus(feature2) {
            var props = feature2.properties;

            if (!props.isoStatus && props.iso1A2) {
              props.isoStatus = "official";
            }
          }

          function loadLevel(feature2) {
            var props = feature2.properties;
            if (props.level) return;

            if (!props.country) {
              props.level = "country";
            } else if (!props.iso1A2 || props.isoStatus === "official") {
              props.level = "territory";
            } else {
              props.level = "subterritory";
            }
          }

          function loadGroupGroups(feature2) {
            var props = feature2.properties;
            if (feature2.geometry || !props.members) return;
            var featureLevelIndex = levels.indexOf(props.level);
            var sharedGroups = [];

            var _loop = function _loop(_i4) {
              var memberID = props.members[_i4];
              var member = featuresByCode[memberID];
              var memberGroups = member.properties.groups.filter(function (groupID) {
                return groupID !== feature2.properties.id && featureLevelIndex < levels.indexOf(featuresByCode[groupID].properties.level);
              });

              if (_i4 === "0") {
                sharedGroups = memberGroups;
              } else {
                sharedGroups = sharedGroups.filter(function (groupID) {
                  return memberGroups.indexOf(groupID) !== -1;
                });
              }
            };

            for (var _i4 in props.members) {
              _loop(_i4);
            }

            props.groups = props.groups.concat(sharedGroups.filter(function (groupID) {
              return props.groups.indexOf(groupID) === -1;
            }));

            for (var j in sharedGroups) {
              var groupFeature = featuresByCode[sharedGroups[j]];

              if (groupFeature.properties.members.indexOf(props.id) === -1) {
                groupFeature.properties.members.push(props.id);
              }
            }
          }

          function loadRoadSpeedUnit(feature2) {
            var props = feature2.properties;

            if (feature2.geometry) {
              if (!props.roadSpeedUnit) props.roadSpeedUnit = "km/h";
            } else if (props.members) {
              var vals = Array.from(new Set(props.members.map(function (id) {
                var member = featuresByCode[id];
                if (member.geometry) return member.properties.roadSpeedUnit || "km/h";
              }).filter(Boolean)));
              if (vals.length === 1) props.roadSpeedUnit = vals[0];
            }
          }

          function loadRoadHeightUnit(feature2) {
            var props = feature2.properties;

            if (feature2.geometry) {
              if (!props.roadHeightUnit) props.roadHeightUnit = "m";
            } else if (props.members) {
              var vals = Array.from(new Set(props.members.map(function (id) {
                var member = featuresByCode[id];
                if (member.geometry) return member.properties.roadHeightUnit || "m";
              }).filter(Boolean)));
              if (vals.length === 1) props.roadHeightUnit = vals[0];
            }
          }

          function loadDriveSide(feature2) {
            var props = feature2.properties;

            if (feature2.geometry) {
              if (!props.driveSide) props.driveSide = "right";
            } else if (props.members) {
              var vals = Array.from(new Set(props.members.map(function (id) {
                var member = featuresByCode[id];
                if (member.geometry) return member.properties.driveSide || "right";
              }).filter(Boolean)));
              if (vals.length === 1) props.driveSide = vals[0];
            }
          }

          function loadCallingCodes(feature2) {
            var props = feature2.properties;

            if (!feature2.geometry && props.members) {
              props.callingCodes = Array.from(new Set(props.members.reduce(function (array, id) {
                var member = featuresByCode[id];
                if (member.geometry && member.properties.callingCodes) return array.concat(member.properties.callingCodes);
                return array;
              }, [])));
            }
          }

          function loadFlag(feature2) {
            if (!feature2.properties.iso1A2) return;
            var flag = feature2.properties.iso1A2.replace(/./g, function (_char) {
              return String.fromCodePoint(_char.charCodeAt(0) + 127397);
            });
            feature2.properties.emojiFlag = flag;
          }

          function loadMembersForGroupsOf(feature2) {
            for (var j in feature2.properties.groups) {
              var groupID = feature2.properties.groups[j];
              var groupFeature = featuresByCode[groupID];
              if (!groupFeature.properties.members) groupFeature.properties.members = [];
              groupFeature.properties.members.push(feature2.properties.id);
            }
          }

          function cacheFeatureByIDs(feature2) {
            var ids = [];

            for (var k in identifierProps) {
              var prop = identifierProps[k];
              var id = feature2.properties[prop];
              if (id) ids.push(id);
            }

            if (feature2.properties.aliases) {
              for (var j in feature2.properties.aliases) {
                ids.push(feature2.properties.aliases[j]);
              }
            }

            for (var _i5 in ids) {
              var _id = canonicalID(ids[_i5]);

              featuresByCode[_id] = feature2;
            }
          }
        }

        function locArray(loc) {
          if (Array.isArray(loc)) {
            return loc;
          } else if (loc.coordinates) {
            return loc.coordinates;
          }

          return loc.geometry.coordinates;
        }

        function smallestFeature(loc) {
          var query = locArray(loc);
          var featureProperties = whichPolygonGetter(query);
          if (!featureProperties) return null;
          return featuresByCode[featureProperties.id];
        }

        function countryFeature(loc) {
          var feature2 = smallestFeature(loc);
          if (!feature2) return null;
          var countryCode = feature2.properties.country || feature2.properties.iso1A2;
          return featuresByCode[countryCode] || null;
        }

        var defaultOpts = {
          level: void 0,
          maxLevel: void 0,
          withProp: void 0
        };

        function featureForLoc(loc, opts) {
          var targetLevel = opts.level || "country";
          var maxLevel = opts.maxLevel || "world";
          var withProp = opts.withProp;
          var targetLevelIndex = levels.indexOf(targetLevel);
          if (targetLevelIndex === -1) return null;
          var maxLevelIndex = levels.indexOf(maxLevel);
          if (maxLevelIndex === -1) return null;
          if (maxLevelIndex < targetLevelIndex) return null;

          if (targetLevel === "country") {
            var fastFeature = countryFeature(loc);

            if (fastFeature) {
              if (!withProp || fastFeature.properties[withProp]) {
                return fastFeature;
              }
            }
          }

          var features2 = featuresContaining(loc);

          for (var i in features2) {
            var feature2 = features2[i];
            var levelIndex = levels.indexOf(feature2.properties.level);

            if (feature2.properties.level === targetLevel || levelIndex > targetLevelIndex && levelIndex <= maxLevelIndex) {
              if (!withProp || feature2.properties[withProp]) {
                return feature2;
              }
            }
          }

          return null;
        }

        function featureForID(id) {
          var stringID;

          if (typeof id === "number") {
            stringID = id.toString();

            if (stringID.length === 1) {
              stringID = "00" + stringID;
            } else if (stringID.length === 2) {
              stringID = "0" + stringID;
            }
          } else {
            stringID = canonicalID(id);
          }

          return featuresByCode[stringID] || null;
        }

        function smallestFeaturesForBbox(bbox) {
          return whichPolygonGetter.bbox(bbox).map(function (props) {
            return featuresByCode[props.id];
          });
        }

        function smallestOrMatchingFeature(query) {
          if (_typeof(query) === "object") {
            return smallestFeature(query);
          }

          return featureForID(query);
        }

        function feature$1(query) {
          var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultOpts;

          if (_typeof(query) === "object") {
            return featureForLoc(query, opts);
          }

          return featureForID(query);
        }

        function iso1A2Code(query) {
          var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultOpts;
          opts.withProp = "iso1A2";
          var match = feature$1(query, opts);
          if (!match) return null;
          return match.properties.iso1A2 || null;
        }

        function featuresContaining(query, strict) {
          var matchingFeatures;

          if (Array.isArray(query) && query.length === 4) {
            matchingFeatures = smallestFeaturesForBbox(query);
          } else {
            var smallestOrMatching = smallestOrMatchingFeature(query);
            matchingFeatures = smallestOrMatching ? [smallestOrMatching] : [];
          }

          if (!matchingFeatures.length) return [];
          var returnFeatures;

          if (!strict || _typeof(query) === "object") {
            returnFeatures = matchingFeatures.slice();
          } else {
            returnFeatures = [];
          }

          for (var j in matchingFeatures) {
            var properties = matchingFeatures[j].properties;

            for (var i in properties.groups) {
              var groupID = properties.groups[i];
              var groupFeature = featuresByCode[groupID];

              if (returnFeatures.indexOf(groupFeature) === -1) {
                returnFeatures.push(groupFeature);
              }
            }
          }

          return returnFeatures;
        }

        function featuresIn(id, strict) {
          var feature2 = featureForID(id);
          if (!feature2) return [];
          var features2 = [];

          if (!strict) {
            features2.push(feature2);
          }

          var properties = feature2.properties;

          if (properties.members) {
            for (var i in properties.members) {
              var memberID = properties.members[i];
              features2.push(featuresByCode[memberID]);
            }
          }

          return features2;
        }

        function aggregateFeature(id) {
          var features2 = featuresIn(id, false);
          if (features2.length === 0) return null;
          var aggregateCoordinates = [];

          for (var i in features2) {
            var feature2 = features2[i];

            if (feature2.geometry && feature2.geometry.type === "MultiPolygon" && feature2.geometry.coordinates) {
              aggregateCoordinates = aggregateCoordinates.concat(feature2.geometry.coordinates);
            }
          }

          return {
            type: "Feature",
            properties: features2[0].properties,
            geometry: {
              type: "MultiPolygon",
              coordinates: aggregateCoordinates
            }
          };
        }

        function roadSpeedUnit(query) {
          var feature2 = smallestOrMatchingFeature(query);
          return feature2 && feature2.properties.roadSpeedUnit || null;
        }

        var RADIUS = 6378137;
        var FLATTENING = 1 / 298.257223563;
        var POLAR_RADIUS = 6356752.3142;
        var wgs84 = {
          RADIUS: RADIUS,
          FLATTENING: FLATTENING,
          POLAR_RADIUS: POLAR_RADIUS
        };

        var geometry_1 = geometry;
        var ring = ringArea;

        function geometry(_) {
          var area = 0,
              i;

          switch (_.type) {
            case 'Polygon':
              return polygonArea(_.coordinates);

            case 'MultiPolygon':
              for (i = 0; i < _.coordinates.length; i++) {
                area += polygonArea(_.coordinates[i]);
              }

              return area;

            case 'Point':
            case 'MultiPoint':
            case 'LineString':
            case 'MultiLineString':
              return 0;

            case 'GeometryCollection':
              for (i = 0; i < _.geometries.length; i++) {
                area += geometry(_.geometries[i]);
              }

              return area;
          }
        }

        function polygonArea(coords) {
          var area = 0;

          if (coords && coords.length > 0) {
            area += Math.abs(ringArea(coords[0]));

            for (var i = 1; i < coords.length; i++) {
              area -= Math.abs(ringArea(coords[i]));
            }
          }

          return area;
        }
        /**
         * Calculate the approximate area of the polygon were it projected onto
         *     the earth.  Note that this area will be positive if ring is oriented
         *     clockwise, otherwise it will be negative.
         *
         * Reference:
         * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
         *     Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
         *     Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
         *
         * Returns:
         * {float} The approximate signed geodesic area of the polygon in square
         *     meters.
         */


        function ringArea(coords) {
          var p1,
              p2,
              p3,
              lowerIndex,
              middleIndex,
              upperIndex,
              i,
              area = 0,
              coordsLength = coords.length;

          if (coordsLength > 2) {
            for (i = 0; i < coordsLength; i++) {
              if (i === coordsLength - 2) {
                // i = N-2
                lowerIndex = coordsLength - 2;
                middleIndex = coordsLength - 1;
                upperIndex = 0;
              } else if (i === coordsLength - 1) {
                // i = N-1
                lowerIndex = coordsLength - 1;
                middleIndex = 0;
                upperIndex = 1;
              } else {
                // i = 0 to N-3
                lowerIndex = i;
                middleIndex = i + 1;
                upperIndex = i + 2;
              }

              p1 = coords[lowerIndex];
              p2 = coords[middleIndex];
              p3 = coords[upperIndex];
              area += (rad(p3[0]) - rad(p1[0])) * Math.sin(rad(p2[1]));
            }

            area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
          }

          return area;
        }

        function rad(_) {
          return _ * Math.PI / 180;
        }

        var geojsonArea = {
          geometry: geometry_1,
          ring: ring
        };

        var $includes = arrayIncludes.includes;


        // `Array.prototype.includes` method
        // https://tc39.es/ecma262/#sec-array.prototype.includes
        _export({ target: 'Array', proto: true }, {
          includes: function includes(el /* , fromIndex = 0 */) {
            return $includes(this, el, arguments.length > 1 ? arguments[1] : undefined);
          }
        });

        // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
        addToUnscopables('includes');

        var validateCenter_1$1 = function validateCenter(center) {
          var validCenterLengths = [2, 3];

          if (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
            throw new Error("ERROR! Center has to be an array of length two or three");
          }

          var _center = _slicedToArray(center, 2),
              lng = _center[0],
              lat = _center[1];

          if (typeof lng !== "number" || typeof lat !== "number") {
            throw new Error("ERROR! Longitude and Latitude has to be numbers but where ".concat(_typeof(lng), " and ").concat(_typeof(lat)));
          }

          if (lng > 180 || lng < -180) {
            throw new Error("ERROR! Longitude has to be between -180 and 180 but was ".concat(lng));
          }

          if (lat > 90 || lat < -90) {
            throw new Error("ERROR! Latitude has to be between -90 and 90 but was ".concat(lat));
          }
        };

        var validateCenter$1 = {
          validateCenter: validateCenter_1$1
        };

        var validateRadius_1$1 = function validateRadius(radius) {
          if (typeof radius !== "number") {
            throw new Error("ERROR! Radius has to be a positive number but was: ".concat(_typeof(radius)));
          }

          if (radius <= 0) {
            throw new Error("ERROR! Radius has to be a positive number but was: ".concat(radius));
          }
        };

        var validateRadius$1 = {
          validateRadius: validateRadius_1$1
        };

        var validateNumberOfEdges_1$1 = function validateNumberOfEdges(numberOfEdges) {
          if (typeof numberOfEdges !== "number") {
            var ARGUMENT_TYPE = Array.isArray(numberOfEdges) ? "array" : _typeof(numberOfEdges);
            throw new Error("ERROR! Number of edges has to be a number but was: ".concat(ARGUMENT_TYPE));
          }

          if (numberOfEdges < 3) {
            throw new Error("ERROR! Number of edges has to be at least 3 but was: ".concat(numberOfEdges));
          }
        };

        var validateNumberOfEdges$1 = {
          validateNumberOfEdges: validateNumberOfEdges_1$1
        };

        var validateEarthRadius_1$1 = function validateEarthRadius(earthRadius) {
          if (typeof earthRadius !== "number") {
            var ARGUMENT_TYPE = Array.isArray(earthRadius) ? "array" : _typeof(earthRadius);
            throw new Error("ERROR! Earth radius has to be a number but was: ".concat(ARGUMENT_TYPE));
          }

          if (earthRadius <= 0) {
            throw new Error("ERROR! Earth radius has to be a positive number but was: ".concat(earthRadius));
          }
        };

        var validateEarthRadius$1 = {
          validateEarthRadius: validateEarthRadius_1$1
        };

        var validateBearing_1$1 = function validateBearing(bearing) {
          if (typeof bearing !== "number") {
            var ARGUMENT_TYPE = Array.isArray(bearing) ? "array" : _typeof(bearing);
            throw new Error("ERROR! Bearing has to be a number but was: ".concat(ARGUMENT_TYPE));
          }
        };

        var validateBearing$1 = {
          validateBearing: validateBearing_1$1
        };

        var validateCenter = validateCenter$1.validateCenter;
        var validateRadius = validateRadius$1.validateRadius;
        var validateNumberOfEdges = validateNumberOfEdges$1.validateNumberOfEdges;
        var validateEarthRadius = validateEarthRadius$1.validateEarthRadius;
        var validateBearing = validateBearing$1.validateBearing;

        function validateInput$1(_ref) {
          var center = _ref.center,
              radius = _ref.radius,
              numberOfEdges = _ref.numberOfEdges,
              earthRadius = _ref.earthRadius,
              bearing = _ref.bearing;
          validateCenter(center);
          validateRadius(radius);
          validateNumberOfEdges(numberOfEdges);
          validateEarthRadius(earthRadius);
          validateBearing(bearing);
        }

        var validateCenter_1 = validateCenter;
        var validateRadius_1 = validateRadius;
        var validateNumberOfEdges_1 = validateNumberOfEdges;
        var validateEarthRadius_1 = validateEarthRadius;
        var validateBearing_1 = validateBearing;
        var validateInput_1 = validateInput$1;
        var inputValidation = {
          validateCenter: validateCenter_1,
          validateRadius: validateRadius_1,
          validateNumberOfEdges: validateNumberOfEdges_1,
          validateEarthRadius: validateEarthRadius_1,
          validateBearing: validateBearing_1,
          validateInput: validateInput_1
        };

        var validateInput = inputValidation.validateInput;
        var defaultEarthRadius = 6378137; // equatorial Earth radius

        function toRadians(angleInDegrees) {
          return angleInDegrees * Math.PI / 180;
        }

        function toDegrees(angleInRadians) {
          return angleInRadians * 180 / Math.PI;
        }

        function offset(c1, distance, earthRadius, bearing) {
          var lat1 = toRadians(c1[1]);
          var lon1 = toRadians(c1[0]);
          var dByR = distance / earthRadius;
          var lat = Math.asin(Math.sin(lat1) * Math.cos(dByR) + Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing));
          var lon = lon1 + Math.atan2(Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1), Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat));
          return [toDegrees(lon), toDegrees(lat)];
        }

        var circleToPolygon = function circleToPolygon(center, radius, options) {
          var n = getNumberOfEdges(options);
          var earthRadius = getEarthRadius(options);
          var bearing = getBearing(options);
          var direction = getDirection(options); // validateInput() throws error on invalid input and do nothing on valid input

          validateInput({
            center: center,
            radius: radius,
            numberOfEdges: n,
            earthRadius: earthRadius,
            bearing: bearing
          });
          var start = toRadians(bearing);
          var coordinates = [];

          for (var i = 0; i < n; ++i) {
            coordinates.push(offset(center, radius, earthRadius, start + direction * 2 * Math.PI * -i / n));
          }

          coordinates.push(coordinates[0]);
          return {
            type: "Polygon",
            coordinates: [coordinates]
          };
        };

        function getNumberOfEdges(options) {
          if (isUndefinedOrNull(options)) {
            return 32;
          } else if (isObjectNotArray(options)) {
            var numberOfEdges = options.numberOfEdges;
            return numberOfEdges === undefined ? 32 : numberOfEdges;
          }

          return options;
        }

        function getEarthRadius(options) {
          if (isUndefinedOrNull(options)) {
            return defaultEarthRadius;
          } else if (isObjectNotArray(options)) {
            var earthRadius = options.earthRadius;
            return earthRadius === undefined ? defaultEarthRadius : earthRadius;
          }

          return defaultEarthRadius;
        }

        function getDirection(options) {
          if (isObjectNotArray(options) && options.rightHandRule) {
            return -1;
          }

          return 1;
        }

        function getBearing(options) {
          if (isUndefinedOrNull(options)) {
            return 0;
          } else if (isObjectNotArray(options)) {
            var bearing = options.bearing;
            return bearing === undefined ? 0 : bearing;
          }

          return 0;
        }

        function isObjectNotArray(argument) {
          return argument !== null && _typeof(argument) === "object" && !Array.isArray(argument);
        }

        function isUndefinedOrNull(argument) {
          return argument === null || argument === undefined;
        }

        // `Number.EPSILON` constant
        // https://tc39.es/ecma262/#sec-number.epsilon
        _export({ target: 'Number', stat: true }, {
          EPSILON: Math.pow(2, -52)
        });

        var quot = /"/g;

        // `CreateHTML` abstract operation
        // https://tc39.es/ecma262/#sec-createhtml
        var createHtml = function (string, tag, attribute, value) {
          var S = String(requireObjectCoercible(string));
          var p1 = '<' + tag;
          if (attribute !== '') p1 += ' ' + attribute + '="' + String(value).replace(quot, '&quot;') + '"';
          return p1 + '>' + S + '</' + tag + '>';
        };

        // check the existence of a method, lowercase
        // of a tag and escaping quotes in arguments
        var stringHtmlForced = function (METHOD_NAME) {
          return fails(function () {
            var test = ''[METHOD_NAME]('"');
            return test !== test.toLowerCase() || test.split('"').length > 3;
          });
        };

        // `String.prototype.link` method
        // https://tc39.es/ecma262/#sec-string.prototype.link
        _export({ target: 'String', proto: true, forced: stringHtmlForced('link') }, {
          link: function link(url) {
            return createHtml(this, 'a', 'href', url);
          }
        });

        /**
         * splaytree v3.1.0
         * Fast Splay tree for Node and browser
         *
         * @author Alexander Milevski <info@w8r.name>
         * @license MIT
         * @preserve
         */
        var Node =
        /** @class */
        function () {
          function Node(key, data) {
            this.next = null;
            this.key = key;
            this.data = data;
            this.left = null;
            this.right = null;
          }

          return Node;
        }();
        /* follows "An implementation of top-down splaying"
         * by D. Sleator <sleator@cs.cmu.edu> March 1992
         */


        function DEFAULT_COMPARE(a, b) {
          return a > b ? 1 : a < b ? -1 : 0;
        }
        /**
         * Simple top down splay, not requiring i to be in the tree t.
         */


        function splay(i, t, comparator) {
          var N = new Node(null, null);
          var l = N;
          var r = N;

          while (true) {
            var cmp = comparator(i, t.key); //if (i < t.key) {

            if (cmp < 0) {
              if (t.left === null) break; //if (i < t.left.key) {

              if (comparator(i, t.left.key) < 0) {
                var y = t.left;
                /* rotate right */

                t.left = y.right;
                y.right = t;
                t = y;
                if (t.left === null) break;
              }

              r.left = t;
              /* link right */

              r = t;
              t = t.left; //} else if (i > t.key) {
            } else if (cmp > 0) {
              if (t.right === null) break; //if (i > t.right.key) {

              if (comparator(i, t.right.key) > 0) {
                var y = t.right;
                /* rotate left */

                t.right = y.left;
                y.left = t;
                t = y;
                if (t.right === null) break;
              }

              l.right = t;
              /* link left */

              l = t;
              t = t.right;
            } else break;
          }
          /* assemble */


          l.right = t.left;
          r.left = t.right;
          t.left = N.right;
          t.right = N.left;
          return t;
        }

        function insert(i, data, t, comparator) {
          var node = new Node(i, data);

          if (t === null) {
            node.left = node.right = null;
            return node;
          }

          t = splay(i, t, comparator);
          var cmp = comparator(i, t.key);

          if (cmp < 0) {
            node.left = t.left;
            node.right = t;
            t.left = null;
          } else if (cmp >= 0) {
            node.right = t.right;
            node.left = t;
            t.right = null;
          }

          return node;
        }

        function split(key, v, comparator) {
          var left = null;
          var right = null;

          if (v) {
            v = splay(key, v, comparator);
            var cmp = comparator(v.key, key);

            if (cmp === 0) {
              left = v.left;
              right = v.right;
            } else if (cmp < 0) {
              right = v.right;
              v.right = null;
              left = v;
            } else {
              left = v.left;
              v.left = null;
              right = v;
            }
          }

          return {
            left: left,
            right: right
          };
        }

        function merge$3(left, right, comparator) {
          if (right === null) return left;
          if (left === null) return right;
          right = splay(left.key, right, comparator);
          right.left = left;
          return right;
        }
        /**
         * Prints level of the tree
         */


        function printRow(root, prefix, isTail, out, printNode) {
          if (root) {
            out("" + prefix + (isTail ? '└── ' : '├── ') + printNode(root) + "\n");
            var indent = prefix + (isTail ? '    ' : '│   ');
            if (root.left) printRow(root.left, indent, false, out, printNode);
            if (root.right) printRow(root.right, indent, true, out, printNode);
          }
        }

        var Tree =
        /** @class */
        function () {
          function Tree(comparator) {
            if (comparator === void 0) {
              comparator = DEFAULT_COMPARE;
            }

            this._root = null;
            this._size = 0;
            this._comparator = comparator;
          }
          /**
           * Inserts a key, allows duplicates
           */


          Tree.prototype.insert = function (key, data) {
            this._size++;
            return this._root = insert(key, data, this._root, this._comparator);
          };
          /**
           * Adds a key, if it is not present in the tree
           */


          Tree.prototype.add = function (key, data) {
            var node = new Node(key, data);

            if (this._root === null) {
              node.left = node.right = null;
              this._size++;
              this._root = node;
            }

            var comparator = this._comparator;
            var t = splay(key, this._root, comparator);
            var cmp = comparator(key, t.key);
            if (cmp === 0) this._root = t;else {
              if (cmp < 0) {
                node.left = t.left;
                node.right = t;
                t.left = null;
              } else if (cmp > 0) {
                node.right = t.right;
                node.left = t;
                t.right = null;
              }

              this._size++;
              this._root = node;
            }
            return this._root;
          };
          /**
           * @param  {Key} key
           * @return {Node|null}
           */


          Tree.prototype.remove = function (key) {
            this._root = this._remove(key, this._root, this._comparator);
          };
          /**
           * Deletes i from the tree if it's there
           */


          Tree.prototype._remove = function (i, t, comparator) {
            var x;
            if (t === null) return null;
            t = splay(i, t, comparator);
            var cmp = comparator(i, t.key);

            if (cmp === 0) {
              /* found it */
              if (t.left === null) {
                x = t.right;
              } else {
                x = splay(i, t.left, comparator);
                x.right = t.right;
              }

              this._size--;
              return x;
            }

            return t;
            /* It wasn't there */
          };
          /**
           * Removes and returns the node with smallest key
           */


          Tree.prototype.pop = function () {
            var node = this._root;

            if (node) {
              while (node.left) {
                node = node.left;
              }

              this._root = splay(node.key, this._root, this._comparator);
              this._root = this._remove(node.key, this._root, this._comparator);
              return {
                key: node.key,
                data: node.data
              };
            }

            return null;
          };
          /**
           * Find without splaying
           */


          Tree.prototype.findStatic = function (key) {
            var current = this._root;
            var compare = this._comparator;

            while (current) {
              var cmp = compare(key, current.key);
              if (cmp === 0) return current;else if (cmp < 0) current = current.left;else current = current.right;
            }

            return null;
          };

          Tree.prototype.find = function (key) {
            if (this._root) {
              this._root = splay(key, this._root, this._comparator);
              if (this._comparator(key, this._root.key) !== 0) return null;
            }

            return this._root;
          };

          Tree.prototype.contains = function (key) {
            var current = this._root;
            var compare = this._comparator;

            while (current) {
              var cmp = compare(key, current.key);
              if (cmp === 0) return true;else if (cmp < 0) current = current.left;else current = current.right;
            }

            return false;
          };

          Tree.prototype.forEach = function (visitor, ctx) {
            var current = this._root;
            var Q = [];
            /* Initialize stack s */

            var done = false;

            while (!done) {
              if (current !== null) {
                Q.push(current);
                current = current.left;
              } else {
                if (Q.length !== 0) {
                  current = Q.pop();
                  visitor.call(ctx, current);
                  current = current.right;
                } else done = true;
              }
            }

            return this;
          };
          /**
           * Walk key range from `low` to `high`. Stops if `fn` returns a value.
           */


          Tree.prototype.range = function (low, high, fn, ctx) {
            var Q = [];
            var compare = this._comparator;
            var node = this._root;
            var cmp;

            while (Q.length !== 0 || node) {
              if (node) {
                Q.push(node);
                node = node.left;
              } else {
                node = Q.pop();
                cmp = compare(node.key, high);

                if (cmp > 0) {
                  break;
                } else if (compare(node.key, low) >= 0) {
                  if (fn.call(ctx, node)) return this; // stop if smth is returned
                }

                node = node.right;
              }
            }

            return this;
          };
          /**
           * Returns array of keys
           */


          Tree.prototype.keys = function () {
            var keys = [];
            this.forEach(function (_a) {
              var key = _a.key;
              return keys.push(key);
            });
            return keys;
          };
          /**
           * Returns array of all the data in the nodes
           */


          Tree.prototype.values = function () {
            var values = [];
            this.forEach(function (_a) {
              var data = _a.data;
              return values.push(data);
            });
            return values;
          };

          Tree.prototype.min = function () {
            if (this._root) return this.minNode(this._root).key;
            return null;
          };

          Tree.prototype.max = function () {
            if (this._root) return this.maxNode(this._root).key;
            return null;
          };

          Tree.prototype.minNode = function (t) {
            if (t === void 0) {
              t = this._root;
            }

            if (t) while (t.left) {
              t = t.left;
            }
            return t;
          };

          Tree.prototype.maxNode = function (t) {
            if (t === void 0) {
              t = this._root;
            }

            if (t) while (t.right) {
              t = t.right;
            }
            return t;
          };
          /**
           * Returns node at given index
           */


          Tree.prototype.at = function (index) {
            var current = this._root;
            var done = false;
            var i = 0;
            var Q = [];

            while (!done) {
              if (current) {
                Q.push(current);
                current = current.left;
              } else {
                if (Q.length > 0) {
                  current = Q.pop();
                  if (i === index) return current;
                  i++;
                  current = current.right;
                } else done = true;
              }
            }

            return null;
          };

          Tree.prototype.next = function (d) {
            var root = this._root;
            var successor = null;

            if (d.right) {
              successor = d.right;

              while (successor.left) {
                successor = successor.left;
              }

              return successor;
            }

            var comparator = this._comparator;

            while (root) {
              var cmp = comparator(d.key, root.key);
              if (cmp === 0) break;else if (cmp < 0) {
                successor = root;
                root = root.left;
              } else root = root.right;
            }

            return successor;
          };

          Tree.prototype.prev = function (d) {
            var root = this._root;
            var predecessor = null;

            if (d.left !== null) {
              predecessor = d.left;

              while (predecessor.right) {
                predecessor = predecessor.right;
              }

              return predecessor;
            }

            var comparator = this._comparator;

            while (root) {
              var cmp = comparator(d.key, root.key);
              if (cmp === 0) break;else if (cmp < 0) root = root.left;else {
                predecessor = root;
                root = root.right;
              }
            }

            return predecessor;
          };

          Tree.prototype.clear = function () {
            this._root = null;
            this._size = 0;
            return this;
          };

          Tree.prototype.toList = function () {
            return toList(this._root);
          };
          /**
           * Bulk-load items. Both array have to be same size
           */


          Tree.prototype.load = function (keys, values, presort) {
            if (values === void 0) {
              values = [];
            }

            if (presort === void 0) {
              presort = false;
            }

            var size = keys.length;
            var comparator = this._comparator; // sort if needed

            if (presort) sort(keys, values, 0, size - 1, comparator);

            if (this._root === null) {
              // empty tree
              this._root = loadRecursive(keys, values, 0, size);
              this._size = size;
            } else {
              // that re-builds the whole tree from two in-order traversals
              var mergedList = mergeLists(this.toList(), createList(keys, values), comparator);
              size = this._size + size;
              this._root = sortedListToBST({
                head: mergedList
              }, 0, size);
            }

            return this;
          };

          Tree.prototype.isEmpty = function () {
            return this._root === null;
          };

          Object.defineProperty(Tree.prototype, "size", {
            get: function get() {
              return this._size;
            },
            enumerable: true,
            configurable: true
          });
          Object.defineProperty(Tree.prototype, "root", {
            get: function get() {
              return this._root;
            },
            enumerable: true,
            configurable: true
          });

          Tree.prototype.toString = function (printNode) {
            if (printNode === void 0) {
              printNode = function printNode(n) {
                return String(n.key);
              };
            }

            var out = [];
            printRow(this._root, '', true, function (v) {
              return out.push(v);
            }, printNode);
            return out.join('');
          };

          Tree.prototype.update = function (key, newKey, newData) {
            var comparator = this._comparator;

            var _a = split(key, this._root, comparator),
                left = _a.left,
                right = _a.right;

            if (comparator(key, newKey) < 0) {
              right = insert(newKey, newData, right, comparator);
            } else {
              left = insert(newKey, newData, left, comparator);
            }

            this._root = merge$3(left, right, comparator);
          };

          Tree.prototype.split = function (key) {
            return split(key, this._root, this._comparator);
          };

          return Tree;
        }();

        function loadRecursive(keys, values, start, end) {
          var size = end - start;

          if (size > 0) {
            var middle = start + Math.floor(size / 2);
            var key = keys[middle];
            var data = values[middle];
            var node = new Node(key, data);
            node.left = loadRecursive(keys, values, start, middle);
            node.right = loadRecursive(keys, values, middle + 1, end);
            return node;
          }

          return null;
        }

        function createList(keys, values) {
          var head = new Node(null, null);
          var p = head;

          for (var i = 0; i < keys.length; i++) {
            p = p.next = new Node(keys[i], values[i]);
          }

          p.next = null;
          return head.next;
        }

        function toList(root) {
          var current = root;
          var Q = [];
          var done = false;
          var head = new Node(null, null);
          var p = head;

          while (!done) {
            if (current) {
              Q.push(current);
              current = current.left;
            } else {
              if (Q.length > 0) {
                current = p = p.next = Q.pop();
                current = current.right;
              } else done = true;
            }
          }

          p.next = null; // that'll work even if the tree was empty

          return head.next;
        }

        function sortedListToBST(list, start, end) {
          var size = end - start;

          if (size > 0) {
            var middle = start + Math.floor(size / 2);
            var left = sortedListToBST(list, start, middle);
            var root = list.head;
            root.left = left;
            list.head = list.head.next;
            root.right = sortedListToBST(list, middle + 1, end);
            return root;
          }

          return null;
        }

        function mergeLists(l1, l2, compare) {
          var head = new Node(null, null); // dummy

          var p = head;
          var p1 = l1;
          var p2 = l2;

          while (p1 !== null && p2 !== null) {
            if (compare(p1.key, p2.key) < 0) {
              p.next = p1;
              p1 = p1.next;
            } else {
              p.next = p2;
              p2 = p2.next;
            }

            p = p.next;
          }

          if (p1 !== null) {
            p.next = p1;
          } else if (p2 !== null) {
            p.next = p2;
          }

          return head.next;
        }

        function sort(keys, values, left, right, compare) {
          if (left >= right) return;
          var pivot = keys[left + right >> 1];
          var i = left - 1;
          var j = right + 1;

          while (true) {
            do {
              i++;
            } while (compare(keys[i], pivot) < 0);

            do {
              j--;
            } while (compare(keys[j], pivot) > 0);

            if (i >= j) break;
            var tmp = keys[i];
            keys[i] = keys[j];
            keys[j] = tmp;
            tmp = values[i];
            values[i] = values[j];
            values[j] = tmp;
          }

          sort(keys, values, left, j, compare);
          sort(keys, values, j + 1, right, compare);
        }

        function _classCallCheck(instance, Constructor) {
          if (!(instance instanceof Constructor)) {
            throw new TypeError("Cannot call a class as a function");
          }
        }

        function _defineProperties(target, props) {
          for (var i = 0; i < props.length; i++) {
            var descriptor = props[i];
            descriptor.enumerable = descriptor.enumerable || false;
            descriptor.configurable = true;
            if ("value" in descriptor) descriptor.writable = true;
            Object.defineProperty(target, descriptor.key, descriptor);
          }
        }

        function _createClass(Constructor, protoProps, staticProps) {
          if (protoProps) _defineProperties(Constructor.prototype, protoProps);
          if (staticProps) _defineProperties(Constructor, staticProps);
          return Constructor;
        }
        /**
         * A bounding box has the format:
         *
         *  { ll: { x: xmin, y: ymin }, ur: { x: xmax, y: ymax } }
         *
         */


        var isInBbox = function isInBbox(bbox, point) {
          return bbox.ll.x <= point.x && point.x <= bbox.ur.x && bbox.ll.y <= point.y && point.y <= bbox.ur.y;
        };
        /* Returns either null, or a bbox (aka an ordered pair of points)
         * If there is only one point of overlap, a bbox with identical points
         * will be returned */


        var getBboxOverlap = function getBboxOverlap(b1, b2) {
          // check if the bboxes overlap at all
          if (b2.ur.x < b1.ll.x || b1.ur.x < b2.ll.x || b2.ur.y < b1.ll.y || b1.ur.y < b2.ll.y) return null; // find the middle two X values

          var lowerX = b1.ll.x < b2.ll.x ? b2.ll.x : b1.ll.x;
          var upperX = b1.ur.x < b2.ur.x ? b1.ur.x : b2.ur.x; // find the middle two Y values

          var lowerY = b1.ll.y < b2.ll.y ? b2.ll.y : b1.ll.y;
          var upperY = b1.ur.y < b2.ur.y ? b1.ur.y : b2.ur.y; // put those middle values together to get the overlap

          return {
            ll: {
              x: lowerX,
              y: lowerY
            },
            ur: {
              x: upperX,
              y: upperY
            }
          };
        };
        /* Javascript doesn't do integer math. Everything is
         * floating point with percision Number.EPSILON.
         *
         * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/EPSILON
         */


        var epsilon = Number.EPSILON; // IE Polyfill

        if (epsilon === undefined) epsilon = Math.pow(2, -52);
        var EPSILON_SQ = epsilon * epsilon;
        /* FLP comparator */

        var cmp = function cmp(a, b) {
          // check if they're both 0
          if (-epsilon < a && a < epsilon) {
            if (-epsilon < b && b < epsilon) {
              return 0;
            }
          } // check if they're flp equal


          var ab = a - b;

          if (ab * ab < EPSILON_SQ * a * b) {
            return 0;
          } // normal comparison


          return a < b ? -1 : 1;
        };
        /**
         * This class rounds incoming values sufficiently so that
         * floating points problems are, for the most part, avoided.
         *
         * Incoming points are have their x & y values tested against
         * all previously seen x & y values. If either is 'too close'
         * to a previously seen value, it's value is 'snapped' to the
         * previously seen value.
         *
         * All points should be rounded by this class before being
         * stored in any data structures in the rest of this algorithm.
         */


        var PtRounder = /*#__PURE__*/function () {
          function PtRounder() {
            _classCallCheck(this, PtRounder);

            this.reset();
          }

          _createClass(PtRounder, [{
            key: "reset",
            value: function reset() {
              this.xRounder = new CoordRounder();
              this.yRounder = new CoordRounder();
            }
          }, {
            key: "round",
            value: function round(x, y) {
              return {
                x: this.xRounder.round(x),
                y: this.yRounder.round(y)
              };
            }
          }]);

          return PtRounder;
        }();

        var CoordRounder = /*#__PURE__*/function () {
          function CoordRounder() {
            _classCallCheck(this, CoordRounder);

            this.tree = new Tree(); // preseed with 0 so we don't end up with values < Number.EPSILON

            this.round(0);
          } // Note: this can rounds input values backwards or forwards.
          //       You might ask, why not restrict this to just rounding
          //       forwards? Wouldn't that allow left endpoints to always
          //       remain left endpoints during splitting (never change to
          //       right). No - it wouldn't, because we snap intersections
          //       to endpoints (to establish independence from the segment
          //       angle for t-intersections).


          _createClass(CoordRounder, [{
            key: "round",
            value: function round(coord) {
              var node = this.tree.add(coord);
              var prevNode = this.tree.prev(node);

              if (prevNode !== null && cmp(node.key, prevNode.key) === 0) {
                this.tree.remove(coord);
                return prevNode.key;
              }

              var nextNode = this.tree.next(node);

              if (nextNode !== null && cmp(node.key, nextNode.key) === 0) {
                this.tree.remove(coord);
                return nextNode.key;
              }

              return coord;
            }
          }]);

          return CoordRounder;
        }(); // singleton available by import


        var rounder = new PtRounder();
        /* Cross Product of two vectors with first point at origin */

        var crossProduct = function crossProduct(a, b) {
          return a.x * b.y - a.y * b.x;
        };
        /* Dot Product of two vectors with first point at origin */


        var dotProduct = function dotProduct(a, b) {
          return a.x * b.x + a.y * b.y;
        };
        /* Comparator for two vectors with same starting point */


        var compareVectorAngles = function compareVectorAngles(basePt, endPt1, endPt2) {
          var v1 = {
            x: endPt1.x - basePt.x,
            y: endPt1.y - basePt.y
          };
          var v2 = {
            x: endPt2.x - basePt.x,
            y: endPt2.y - basePt.y
          };
          var kross = crossProduct(v1, v2);
          return cmp(kross, 0);
        };

        var length = function length(v) {
          return Math.sqrt(dotProduct(v, v));
        };
        /* Get the sine of the angle from pShared -> pAngle to pShaed -> pBase */


        var sineOfAngle = function sineOfAngle(pShared, pBase, pAngle) {
          var vBase = {
            x: pBase.x - pShared.x,
            y: pBase.y - pShared.y
          };
          var vAngle = {
            x: pAngle.x - pShared.x,
            y: pAngle.y - pShared.y
          };
          return crossProduct(vAngle, vBase) / length(vAngle) / length(vBase);
        };
        /* Get the cosine of the angle from pShared -> pAngle to pShaed -> pBase */


        var cosineOfAngle = function cosineOfAngle(pShared, pBase, pAngle) {
          var vBase = {
            x: pBase.x - pShared.x,
            y: pBase.y - pShared.y
          };
          var vAngle = {
            x: pAngle.x - pShared.x,
            y: pAngle.y - pShared.y
          };
          return dotProduct(vAngle, vBase) / length(vAngle) / length(vBase);
        };
        /* Get the x coordinate where the given line (defined by a point and vector)
         * crosses the horizontal line with the given y coordiante.
         * In the case of parrallel lines (including overlapping ones) returns null. */


        var horizontalIntersection = function horizontalIntersection(pt, v, y) {
          if (v.y === 0) return null;
          return {
            x: pt.x + v.x / v.y * (y - pt.y),
            y: y
          };
        };
        /* Get the y coordinate where the given line (defined by a point and vector)
         * crosses the vertical line with the given x coordiante.
         * In the case of parrallel lines (including overlapping ones) returns null. */


        var verticalIntersection = function verticalIntersection(pt, v, x) {
          if (v.x === 0) return null;
          return {
            x: x,
            y: pt.y + v.y / v.x * (x - pt.x)
          };
        };
        /* Get the intersection of two lines, each defined by a base point and a vector.
         * In the case of parrallel lines (including overlapping ones) returns null. */


        var intersection = function intersection(pt1, v1, pt2, v2) {
          // take some shortcuts for vertical and horizontal lines
          // this also ensures we don't calculate an intersection and then discover
          // it's actually outside the bounding box of the line
          if (v1.x === 0) return verticalIntersection(pt2, v2, pt1.x);
          if (v2.x === 0) return verticalIntersection(pt1, v1, pt2.x);
          if (v1.y === 0) return horizontalIntersection(pt2, v2, pt1.y);
          if (v2.y === 0) return horizontalIntersection(pt1, v1, pt2.y); // General case for non-overlapping segments.
          // This algorithm is based on Schneider and Eberly.
          // http://www.cimec.org.ar/~ncalvo/Schneider_Eberly.pdf - pg 244

          var kross = crossProduct(v1, v2);
          if (kross == 0) return null;
          var ve = {
            x: pt2.x - pt1.x,
            y: pt2.y - pt1.y
          };
          var d1 = crossProduct(ve, v1) / kross;
          var d2 = crossProduct(ve, v2) / kross; // take the average of the two calculations to minimize rounding error

          var x1 = pt1.x + d2 * v1.x,
              x2 = pt2.x + d1 * v2.x;
          var y1 = pt1.y + d2 * v1.y,
              y2 = pt2.y + d1 * v2.y;
          var x = (x1 + x2) / 2;
          var y = (y1 + y2) / 2;
          return {
            x: x,
            y: y
          };
        };

        var SweepEvent = /*#__PURE__*/function () {
          _createClass(SweepEvent, null, [{
            key: "compare",
            // for ordering sweep events in the sweep event queue
            value: function compare(a, b) {
              // favor event with a point that the sweep line hits first
              var ptCmp = SweepEvent.comparePoints(a.point, b.point);
              if (ptCmp !== 0) return ptCmp; // the points are the same, so link them if needed

              if (a.point !== b.point) a.link(b); // favor right events over left

              if (a.isLeft !== b.isLeft) return a.isLeft ? 1 : -1; // we have two matching left or right endpoints
              // ordering of this case is the same as for their segments

              return Segment.compare(a.segment, b.segment);
            } // for ordering points in sweep line order

          }, {
            key: "comparePoints",
            value: function comparePoints(aPt, bPt) {
              if (aPt.x < bPt.x) return -1;
              if (aPt.x > bPt.x) return 1;
              if (aPt.y < bPt.y) return -1;
              if (aPt.y > bPt.y) return 1;
              return 0;
            } // Warning: 'point' input will be modified and re-used (for performance)

          }]);

          function SweepEvent(point, isLeft) {
            _classCallCheck(this, SweepEvent);

            if (point.events === undefined) point.events = [this];else point.events.push(this);
            this.point = point;
            this.isLeft = isLeft; // this.segment, this.otherSE set by factory
          }

          _createClass(SweepEvent, [{
            key: "link",
            value: function link(other) {
              if (other.point === this.point) {
                throw new Error('Tried to link already linked events');
              }

              var otherEvents = other.point.events;

              for (var i = 0, iMax = otherEvents.length; i < iMax; i++) {
                var evt = otherEvents[i];
                this.point.events.push(evt);
                evt.point = this.point;
              }

              this.checkForConsuming();
            }
            /* Do a pass over our linked events and check to see if any pair
             * of segments match, and should be consumed. */

          }, {
            key: "checkForConsuming",
            value: function checkForConsuming() {
              // FIXME: The loops in this method run O(n^2) => no good.
              //        Maintain little ordered sweep event trees?
              //        Can we maintaining an ordering that avoids the need
              //        for the re-sorting with getLeftmostComparator in geom-out?
              // Compare each pair of events to see if other events also match
              var numEvents = this.point.events.length;

              for (var i = 0; i < numEvents; i++) {
                var evt1 = this.point.events[i];
                if (evt1.segment.consumedBy !== undefined) continue;

                for (var j = i + 1; j < numEvents; j++) {
                  var evt2 = this.point.events[j];
                  if (evt2.consumedBy !== undefined) continue;
                  if (evt1.otherSE.point.events !== evt2.otherSE.point.events) continue;
                  evt1.segment.consume(evt2.segment);
                }
              }
            }
          }, {
            key: "getAvailableLinkedEvents",
            value: function getAvailableLinkedEvents() {
              // point.events is always of length 2 or greater
              var events = [];

              for (var i = 0, iMax = this.point.events.length; i < iMax; i++) {
                var evt = this.point.events[i];

                if (evt !== this && !evt.segment.ringOut && evt.segment.isInResult()) {
                  events.push(evt);
                }
              }

              return events;
            }
            /**
             * Returns a comparator function for sorting linked events that will
             * favor the event that will give us the smallest left-side angle.
             * All ring construction starts as low as possible heading to the right,
             * so by always turning left as sharp as possible we'll get polygons
             * without uncessary loops & holes.
             *
             * The comparator function has a compute cache such that it avoids
             * re-computing already-computed values.
             */

          }, {
            key: "getLeftmostComparator",
            value: function getLeftmostComparator(baseEvent) {
              var _this = this;

              var cache = new Map();

              var fillCache = function fillCache(linkedEvent) {
                var nextEvent = linkedEvent.otherSE;
                cache.set(linkedEvent, {
                  sine: sineOfAngle(_this.point, baseEvent.point, nextEvent.point),
                  cosine: cosineOfAngle(_this.point, baseEvent.point, nextEvent.point)
                });
              };

              return function (a, b) {
                if (!cache.has(a)) fillCache(a);
                if (!cache.has(b)) fillCache(b);

                var _cache$get = cache.get(a),
                    asine = _cache$get.sine,
                    acosine = _cache$get.cosine;

                var _cache$get2 = cache.get(b),
                    bsine = _cache$get2.sine,
                    bcosine = _cache$get2.cosine; // both on or above x-axis


                if (asine >= 0 && bsine >= 0) {
                  if (acosine < bcosine) return 1;
                  if (acosine > bcosine) return -1;
                  return 0;
                } // both below x-axis


                if (asine < 0 && bsine < 0) {
                  if (acosine < bcosine) return -1;
                  if (acosine > bcosine) return 1;
                  return 0;
                } // one above x-axis, one below


                if (bsine < asine) return -1;
                if (bsine > asine) return 1;
                return 0;
              };
            }
          }]);

          return SweepEvent;
        }(); // segments and sweep events when all else is identical


        var segmentId = 0;

        var Segment = /*#__PURE__*/function () {
          _createClass(Segment, null, [{
            key: "compare",

            /* This compare() function is for ordering segments in the sweep
             * line tree, and does so according to the following criteria:
             *
             * Consider the vertical line that lies an infinestimal step to the
             * right of the right-more of the two left endpoints of the input
             * segments. Imagine slowly moving a point up from negative infinity
             * in the increasing y direction. Which of the two segments will that
             * point intersect first? That segment comes 'before' the other one.
             *
             * If neither segment would be intersected by such a line, (if one
             * or more of the segments are vertical) then the line to be considered
             * is directly on the right-more of the two left inputs.
             */
            value: function compare(a, b) {
              var alx = a.leftSE.point.x;
              var blx = b.leftSE.point.x;
              var arx = a.rightSE.point.x;
              var brx = b.rightSE.point.x; // check if they're even in the same vertical plane

              if (brx < alx) return 1;
              if (arx < blx) return -1;
              var aly = a.leftSE.point.y;
              var bly = b.leftSE.point.y;
              var ary = a.rightSE.point.y;
              var bry = b.rightSE.point.y; // is left endpoint of segment B the right-more?

              if (alx < blx) {
                // are the two segments in the same horizontal plane?
                if (bly < aly && bly < ary) return 1;
                if (bly > aly && bly > ary) return -1; // is the B left endpoint colinear to segment A?

                var aCmpBLeft = a.comparePoint(b.leftSE.point);
                if (aCmpBLeft < 0) return 1;
                if (aCmpBLeft > 0) return -1; // is the A right endpoint colinear to segment B ?

                var bCmpARight = b.comparePoint(a.rightSE.point);
                if (bCmpARight !== 0) return bCmpARight; // colinear segments, consider the one with left-more
                // left endpoint to be first (arbitrary?)

                return -1;
              } // is left endpoint of segment A the right-more?


              if (alx > blx) {
                if (aly < bly && aly < bry) return -1;
                if (aly > bly && aly > bry) return 1; // is the A left endpoint colinear to segment B?

                var bCmpALeft = b.comparePoint(a.leftSE.point);
                if (bCmpALeft !== 0) return bCmpALeft; // is the B right endpoint colinear to segment A?

                var aCmpBRight = a.comparePoint(b.rightSE.point);
                if (aCmpBRight < 0) return 1;
                if (aCmpBRight > 0) return -1; // colinear segments, consider the one with left-more
                // left endpoint to be first (arbitrary?)

                return 1;
              } // if we get here, the two left endpoints are in the same
              // vertical plane, ie alx === blx
              // consider the lower left-endpoint to come first


              if (aly < bly) return -1;
              if (aly > bly) return 1; // left endpoints are identical
              // check for colinearity by using the left-more right endpoint
              // is the A right endpoint more left-more?

              if (arx < brx) {
                var _bCmpARight = b.comparePoint(a.rightSE.point);

                if (_bCmpARight !== 0) return _bCmpARight;
              } // is the B right endpoint more left-more?


              if (arx > brx) {
                var _aCmpBRight = a.comparePoint(b.rightSE.point);

                if (_aCmpBRight < 0) return 1;
                if (_aCmpBRight > 0) return -1;
              }

              if (arx !== brx) {
                // are these two [almost] vertical segments with opposite orientation?
                // if so, the one with the lower right endpoint comes first
                var ay = ary - aly;
                var ax = arx - alx;
                var by = bry - bly;
                var bx = brx - blx;
                if (ay > ax && by < bx) return 1;
                if (ay < ax && by > bx) return -1;
              } // we have colinear segments with matching orientation
              // consider the one with more left-more right endpoint to be first


              if (arx > brx) return 1;
              if (arx < brx) return -1; // if we get here, two two right endpoints are in the same
              // vertical plane, ie arx === brx
              // consider the lower right-endpoint to come first

              if (ary < bry) return -1;
              if (ary > bry) return 1; // right endpoints identical as well, so the segments are idential
              // fall back on creation order as consistent tie-breaker

              if (a.id < b.id) return -1;
              if (a.id > b.id) return 1; // identical segment, ie a === b

              return 0;
            }
            /* Warning: a reference to ringWindings input will be stored,
             *  and possibly will be later modified */

          }]);

          function Segment(leftSE, rightSE, rings, windings) {
            _classCallCheck(this, Segment);

            this.id = ++segmentId;
            this.leftSE = leftSE;
            leftSE.segment = this;
            leftSE.otherSE = rightSE;
            this.rightSE = rightSE;
            rightSE.segment = this;
            rightSE.otherSE = leftSE;
            this.rings = rings;
            this.windings = windings; // left unset for performance, set later in algorithm
            // this.ringOut, this.consumedBy, this.prev
          }

          _createClass(Segment, [{
            key: "replaceRightSE",

            /* When a segment is split, the rightSE is replaced with a new sweep event */
            value: function replaceRightSE(newRightSE) {
              this.rightSE = newRightSE;
              this.rightSE.segment = this;
              this.rightSE.otherSE = this.leftSE;
              this.leftSE.otherSE = this.rightSE;
            }
          }, {
            key: "bbox",
            value: function bbox() {
              var y1 = this.leftSE.point.y;
              var y2 = this.rightSE.point.y;
              return {
                ll: {
                  x: this.leftSE.point.x,
                  y: y1 < y2 ? y1 : y2
                },
                ur: {
                  x: this.rightSE.point.x,
                  y: y1 > y2 ? y1 : y2
                }
              };
            }
            /* A vector from the left point to the right */

          }, {
            key: "vector",
            value: function vector() {
              return {
                x: this.rightSE.point.x - this.leftSE.point.x,
                y: this.rightSE.point.y - this.leftSE.point.y
              };
            }
          }, {
            key: "isAnEndpoint",
            value: function isAnEndpoint(pt) {
              return pt.x === this.leftSE.point.x && pt.y === this.leftSE.point.y || pt.x === this.rightSE.point.x && pt.y === this.rightSE.point.y;
            }
            /* Compare this segment with a point.
             *
             * A point P is considered to be colinear to a segment if there
             * exists a distance D such that if we travel along the segment
             * from one * endpoint towards the other a distance D, we find
             * ourselves at point P.
             *
             * Return value indicates:
             *
             *   1: point lies above the segment (to the left of vertical)
             *   0: point is colinear to segment
             *  -1: point lies below the segment (to the right of vertical)
             */

          }, {
            key: "comparePoint",
            value: function comparePoint(point) {
              if (this.isAnEndpoint(point)) return 0;
              var lPt = this.leftSE.point;
              var rPt = this.rightSE.point;
              var v = this.vector(); // Exactly vertical segments.

              if (lPt.x === rPt.x) {
                if (point.x === lPt.x) return 0;
                return point.x < lPt.x ? 1 : -1;
              } // Nearly vertical segments with an intersection.
              // Check to see where a point on the line with matching Y coordinate is.


              var yDist = (point.y - lPt.y) / v.y;
              var xFromYDist = lPt.x + yDist * v.x;
              if (point.x === xFromYDist) return 0; // General case.
              // Check to see where a point on the line with matching X coordinate is.

              var xDist = (point.x - lPt.x) / v.x;
              var yFromXDist = lPt.y + xDist * v.y;
              if (point.y === yFromXDist) return 0;
              return point.y < yFromXDist ? -1 : 1;
            }
            /**
             * Given another segment, returns the first non-trivial intersection
             * between the two segments (in terms of sweep line ordering), if it exists.
             *
             * A 'non-trivial' intersection is one that will cause one or both of the
             * segments to be split(). As such, 'trivial' vs. 'non-trivial' intersection:
             *
             *   * endpoint of segA with endpoint of segB --> trivial
             *   * endpoint of segA with point along segB --> non-trivial
             *   * endpoint of segB with point along segA --> non-trivial
             *   * point along segA with point along segB --> non-trivial
             *
             * If no non-trivial intersection exists, return null
             * Else, return null.
             */

          }, {
            key: "getIntersection",
            value: function getIntersection(other) {
              // If bboxes don't overlap, there can't be any intersections
              var tBbox = this.bbox();
              var oBbox = other.bbox();
              var bboxOverlap = getBboxOverlap(tBbox, oBbox);
              if (bboxOverlap === null) return null; // We first check to see if the endpoints can be considered intersections.
              // This will 'snap' intersections to endpoints if possible, and will
              // handle cases of colinearity.

              var tlp = this.leftSE.point;
              var trp = this.rightSE.point;
              var olp = other.leftSE.point;
              var orp = other.rightSE.point; // does each endpoint touch the other segment?
              // note that we restrict the 'touching' definition to only allow segments
              // to touch endpoints that lie forward from where we are in the sweep line pass

              var touchesOtherLSE = isInBbox(tBbox, olp) && this.comparePoint(olp) === 0;
              var touchesThisLSE = isInBbox(oBbox, tlp) && other.comparePoint(tlp) === 0;
              var touchesOtherRSE = isInBbox(tBbox, orp) && this.comparePoint(orp) === 0;
              var touchesThisRSE = isInBbox(oBbox, trp) && other.comparePoint(trp) === 0; // do left endpoints match?

              if (touchesThisLSE && touchesOtherLSE) {
                // these two cases are for colinear segments with matching left
                // endpoints, and one segment being longer than the other
                if (touchesThisRSE && !touchesOtherRSE) return trp;
                if (!touchesThisRSE && touchesOtherRSE) return orp; // either the two segments match exactly (two trival intersections)
                // or just on their left endpoint (one trivial intersection

                return null;
              } // does this left endpoint matches (other doesn't)


              if (touchesThisLSE) {
                // check for segments that just intersect on opposing endpoints
                if (touchesOtherRSE) {
                  if (tlp.x === orp.x && tlp.y === orp.y) return null;
                } // t-intersection on left endpoint


                return tlp;
              } // does other left endpoint matches (this doesn't)


              if (touchesOtherLSE) {
                // check for segments that just intersect on opposing endpoints
                if (touchesThisRSE) {
                  if (trp.x === olp.x && trp.y === olp.y) return null;
                } // t-intersection on left endpoint


                return olp;
              } // trivial intersection on right endpoints


              if (touchesThisRSE && touchesOtherRSE) return null; // t-intersections on just one right endpoint

              if (touchesThisRSE) return trp;
              if (touchesOtherRSE) return orp; // None of our endpoints intersect. Look for a general intersection between
              // infinite lines laid over the segments

              var pt = intersection(tlp, this.vector(), olp, other.vector()); // are the segments parrallel? Note that if they were colinear with overlap,
              // they would have an endpoint intersection and that case was already handled above

              if (pt === null) return null; // is the intersection found between the lines not on the segments?

              if (!isInBbox(bboxOverlap, pt)) return null; // round the the computed point if needed

              return rounder.round(pt.x, pt.y);
            }
            /**
             * Split the given segment into multiple segments on the given points.
             *  * Each existing segment will retain its leftSE and a new rightSE will be
             *    generated for it.
             *  * A new segment will be generated which will adopt the original segment's
             *    rightSE, and a new leftSE will be generated for it.
             *  * If there are more than two points given to split on, new segments
             *    in the middle will be generated with new leftSE and rightSE's.
             *  * An array of the newly generated SweepEvents will be returned.
             *
             * Warning: input array of points is modified
             */

          }, {
            key: "split",
            value: function split(point) {
              var newEvents = [];
              var alreadyLinked = point.events !== undefined;
              var newLeftSE = new SweepEvent(point, true);
              var newRightSE = new SweepEvent(point, false);
              var oldRightSE = this.rightSE;
              this.replaceRightSE(newRightSE);
              newEvents.push(newRightSE);
              newEvents.push(newLeftSE);
              var newSeg = new Segment(newLeftSE, oldRightSE, this.rings.slice(), this.windings.slice()); // when splitting a nearly vertical downward-facing segment,
              // sometimes one of the resulting new segments is vertical, in which
              // case its left and right events may need to be swapped

              if (SweepEvent.comparePoints(newSeg.leftSE.point, newSeg.rightSE.point) > 0) {
                newSeg.swapEvents();
              }

              if (SweepEvent.comparePoints(this.leftSE.point, this.rightSE.point) > 0) {
                this.swapEvents();
              } // in the point we just used to create new sweep events with was already
              // linked to other events, we need to check if either of the affected
              // segments should be consumed


              if (alreadyLinked) {
                newLeftSE.checkForConsuming();
                newRightSE.checkForConsuming();
              }

              return newEvents;
            }
            /* Swap which event is left and right */

          }, {
            key: "swapEvents",
            value: function swapEvents() {
              var tmpEvt = this.rightSE;
              this.rightSE = this.leftSE;
              this.leftSE = tmpEvt;
              this.leftSE.isLeft = true;
              this.rightSE.isLeft = false;

              for (var i = 0, iMax = this.windings.length; i < iMax; i++) {
                this.windings[i] *= -1;
              }
            }
            /* Consume another segment. We take their rings under our wing
             * and mark them as consumed. Use for perfectly overlapping segments */

          }, {
            key: "consume",
            value: function consume(other) {
              var consumer = this;
              var consumee = other;

              while (consumer.consumedBy) {
                consumer = consumer.consumedBy;
              }

              while (consumee.consumedBy) {
                consumee = consumee.consumedBy;
              }

              var cmp = Segment.compare(consumer, consumee);
              if (cmp === 0) return; // already consumed
              // the winner of the consumption is the earlier segment
              // according to sweep line ordering

              if (cmp > 0) {
                var tmp = consumer;
                consumer = consumee;
                consumee = tmp;
              } // make sure a segment doesn't consume it's prev


              if (consumer.prev === consumee) {
                var _tmp = consumer;
                consumer = consumee;
                consumee = _tmp;
              }

              for (var i = 0, iMax = consumee.rings.length; i < iMax; i++) {
                var ring = consumee.rings[i];
                var winding = consumee.windings[i];
                var index = consumer.rings.indexOf(ring);

                if (index === -1) {
                  consumer.rings.push(ring);
                  consumer.windings.push(winding);
                } else consumer.windings[index] += winding;
              }

              consumee.rings = null;
              consumee.windings = null;
              consumee.consumedBy = consumer; // mark sweep events consumed as to maintain ordering in sweep event queue

              consumee.leftSE.consumedBy = consumer.leftSE;
              consumee.rightSE.consumedBy = consumer.rightSE;
            }
            /* The first segment previous segment chain that is in the result */

          }, {
            key: "prevInResult",
            value: function prevInResult() {
              if (this._prevInResult !== undefined) return this._prevInResult;
              if (!this.prev) this._prevInResult = null;else if (this.prev.isInResult()) this._prevInResult = this.prev;else this._prevInResult = this.prev.prevInResult();
              return this._prevInResult;
            }
          }, {
            key: "beforeState",
            value: function beforeState() {
              if (this._beforeState !== undefined) return this._beforeState;
              if (!this.prev) this._beforeState = {
                rings: [],
                windings: [],
                multiPolys: []
              };else {
                var seg = this.prev.consumedBy || this.prev;
                this._beforeState = seg.afterState();
              }
              return this._beforeState;
            }
          }, {
            key: "afterState",
            value: function afterState() {
              if (this._afterState !== undefined) return this._afterState;
              var beforeState = this.beforeState();
              this._afterState = {
                rings: beforeState.rings.slice(0),
                windings: beforeState.windings.slice(0),
                multiPolys: []
              };
              var ringsAfter = this._afterState.rings;
              var windingsAfter = this._afterState.windings;
              var mpsAfter = this._afterState.multiPolys; // calculate ringsAfter, windingsAfter

              for (var i = 0, iMax = this.rings.length; i < iMax; i++) {
                var ring = this.rings[i];
                var winding = this.windings[i];
                var index = ringsAfter.indexOf(ring);

                if (index === -1) {
                  ringsAfter.push(ring);
                  windingsAfter.push(winding);
                } else windingsAfter[index] += winding;
              } // calcualte polysAfter


              var polysAfter = [];
              var polysExclude = [];

              for (var _i = 0, _iMax = ringsAfter.length; _i < _iMax; _i++) {
                if (windingsAfter[_i] === 0) continue; // non-zero rule

                var _ring = ringsAfter[_i];
                var poly = _ring.poly;
                if (polysExclude.indexOf(poly) !== -1) continue;
                if (_ring.isExterior) polysAfter.push(poly);else {
                  if (polysExclude.indexOf(poly) === -1) polysExclude.push(poly);

                  var _index = polysAfter.indexOf(_ring.poly);

                  if (_index !== -1) polysAfter.splice(_index, 1);
                }
              } // calculate multiPolysAfter


              for (var _i2 = 0, _iMax2 = polysAfter.length; _i2 < _iMax2; _i2++) {
                var mp = polysAfter[_i2].multiPoly;
                if (mpsAfter.indexOf(mp) === -1) mpsAfter.push(mp);
              }

              return this._afterState;
            }
            /* Is this segment part of the final result? */

          }, {
            key: "isInResult",
            value: function isInResult() {
              // if we've been consumed, we're not in the result
              if (this.consumedBy) return false;
              if (this._isInResult !== undefined) return this._isInResult;
              var mpsBefore = this.beforeState().multiPolys;
              var mpsAfter = this.afterState().multiPolys;

              switch (operation.type) {
                case 'union':
                  {
                    // UNION - included iff:
                    //  * On one side of us there is 0 poly interiors AND
                    //  * On the other side there is 1 or more.
                    var noBefores = mpsBefore.length === 0;
                    var noAfters = mpsAfter.length === 0;
                    this._isInResult = noBefores !== noAfters;
                    break;
                  }

                case 'intersection':
                  {
                    // INTERSECTION - included iff:
                    //  * on one side of us all multipolys are rep. with poly interiors AND
                    //  * on the other side of us, not all multipolys are repsented
                    //    with poly interiors
                    var least;
                    var most;

                    if (mpsBefore.length < mpsAfter.length) {
                      least = mpsBefore.length;
                      most = mpsAfter.length;
                    } else {
                      least = mpsAfter.length;
                      most = mpsBefore.length;
                    }

                    this._isInResult = most === operation.numMultiPolys && least < most;
                    break;
                  }

                case 'xor':
                  {
                    // XOR - included iff:
                    //  * the difference between the number of multipolys represented
                    //    with poly interiors on our two sides is an odd number
                    var diff = Math.abs(mpsBefore.length - mpsAfter.length);
                    this._isInResult = diff % 2 === 1;
                    break;
                  }

                case 'difference':
                  {
                    // DIFFERENCE included iff:
                    //  * on exactly one side, we have just the subject
                    var isJustSubject = function isJustSubject(mps) {
                      return mps.length === 1 && mps[0].isSubject;
                    };

                    this._isInResult = isJustSubject(mpsBefore) !== isJustSubject(mpsAfter);
                    break;
                  }

                default:
                  throw new Error("Unrecognized operation type found ".concat(operation.type));
              }

              return this._isInResult;
            }
          }], [{
            key: "fromRing",
            value: function fromRing(pt1, pt2, ring) {
              var leftPt, rightPt, winding; // ordering the two points according to sweep line ordering

              var cmpPts = SweepEvent.comparePoints(pt1, pt2);

              if (cmpPts < 0) {
                leftPt = pt1;
                rightPt = pt2;
                winding = 1;
              } else if (cmpPts > 0) {
                leftPt = pt2;
                rightPt = pt1;
                winding = -1;
              } else throw new Error("Tried to create degenerate segment at [".concat(pt1.x, ", ").concat(pt1.y, "]"));

              var leftSE = new SweepEvent(leftPt, true);
              var rightSE = new SweepEvent(rightPt, false);
              return new Segment(leftSE, rightSE, [ring], [winding]);
            }
          }]);

          return Segment;
        }();

        var RingIn = /*#__PURE__*/function () {
          function RingIn(geomRing, poly, isExterior) {
            _classCallCheck(this, RingIn);

            if (!Array.isArray(geomRing) || geomRing.length === 0) {
              throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
            }

            this.poly = poly;
            this.isExterior = isExterior;
            this.segments = [];

            if (typeof geomRing[0][0] !== 'number' || typeof geomRing[0][1] !== 'number') {
              throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
            }

            var firstPoint = rounder.round(geomRing[0][0], geomRing[0][1]);
            this.bbox = {
              ll: {
                x: firstPoint.x,
                y: firstPoint.y
              },
              ur: {
                x: firstPoint.x,
                y: firstPoint.y
              }
            };
            var prevPoint = firstPoint;

            for (var i = 1, iMax = geomRing.length; i < iMax; i++) {
              if (typeof geomRing[i][0] !== 'number' || typeof geomRing[i][1] !== 'number') {
                throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
              }

              var point = rounder.round(geomRing[i][0], geomRing[i][1]); // skip repeated points

              if (point.x === prevPoint.x && point.y === prevPoint.y) continue;
              this.segments.push(Segment.fromRing(prevPoint, point, this));
              if (point.x < this.bbox.ll.x) this.bbox.ll.x = point.x;
              if (point.y < this.bbox.ll.y) this.bbox.ll.y = point.y;
              if (point.x > this.bbox.ur.x) this.bbox.ur.x = point.x;
              if (point.y > this.bbox.ur.y) this.bbox.ur.y = point.y;
              prevPoint = point;
            } // add segment from last to first if last is not the same as first


            if (firstPoint.x !== prevPoint.x || firstPoint.y !== prevPoint.y) {
              this.segments.push(Segment.fromRing(prevPoint, firstPoint, this));
            }
          }

          _createClass(RingIn, [{
            key: "getSweepEvents",
            value: function getSweepEvents() {
              var sweepEvents = [];

              for (var i = 0, iMax = this.segments.length; i < iMax; i++) {
                var segment = this.segments[i];
                sweepEvents.push(segment.leftSE);
                sweepEvents.push(segment.rightSE);
              }

              return sweepEvents;
            }
          }]);

          return RingIn;
        }();

        var PolyIn = /*#__PURE__*/function () {
          function PolyIn(geomPoly, multiPoly) {
            _classCallCheck(this, PolyIn);

            if (!Array.isArray(geomPoly)) {
              throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
            }

            this.exteriorRing = new RingIn(geomPoly[0], this, true); // copy by value

            this.bbox = {
              ll: {
                x: this.exteriorRing.bbox.ll.x,
                y: this.exteriorRing.bbox.ll.y
              },
              ur: {
                x: this.exteriorRing.bbox.ur.x,
                y: this.exteriorRing.bbox.ur.y
              }
            };
            this.interiorRings = [];

            for (var i = 1, iMax = geomPoly.length; i < iMax; i++) {
              var ring = new RingIn(geomPoly[i], this, false);
              if (ring.bbox.ll.x < this.bbox.ll.x) this.bbox.ll.x = ring.bbox.ll.x;
              if (ring.bbox.ll.y < this.bbox.ll.y) this.bbox.ll.y = ring.bbox.ll.y;
              if (ring.bbox.ur.x > this.bbox.ur.x) this.bbox.ur.x = ring.bbox.ur.x;
              if (ring.bbox.ur.y > this.bbox.ur.y) this.bbox.ur.y = ring.bbox.ur.y;
              this.interiorRings.push(ring);
            }

            this.multiPoly = multiPoly;
          }

          _createClass(PolyIn, [{
            key: "getSweepEvents",
            value: function getSweepEvents() {
              var sweepEvents = this.exteriorRing.getSweepEvents();

              for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
                var ringSweepEvents = this.interiorRings[i].getSweepEvents();

                for (var j = 0, jMax = ringSweepEvents.length; j < jMax; j++) {
                  sweepEvents.push(ringSweepEvents[j]);
                }
              }

              return sweepEvents;
            }
          }]);

          return PolyIn;
        }();

        var MultiPolyIn = /*#__PURE__*/function () {
          function MultiPolyIn(geom, isSubject) {
            _classCallCheck(this, MultiPolyIn);

            if (!Array.isArray(geom)) {
              throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
            }

            try {
              // if the input looks like a polygon, convert it to a multipolygon
              if (typeof geom[0][0][0] === 'number') geom = [geom];
            } catch (ex) {// The input is either malformed or has empty arrays.
              // In either case, it will be handled later on.
            }

            this.polys = [];
            this.bbox = {
              ll: {
                x: Number.POSITIVE_INFINITY,
                y: Number.POSITIVE_INFINITY
              },
              ur: {
                x: Number.NEGATIVE_INFINITY,
                y: Number.NEGATIVE_INFINITY
              }
            };

            for (var i = 0, iMax = geom.length; i < iMax; i++) {
              var poly = new PolyIn(geom[i], this);
              if (poly.bbox.ll.x < this.bbox.ll.x) this.bbox.ll.x = poly.bbox.ll.x;
              if (poly.bbox.ll.y < this.bbox.ll.y) this.bbox.ll.y = poly.bbox.ll.y;
              if (poly.bbox.ur.x > this.bbox.ur.x) this.bbox.ur.x = poly.bbox.ur.x;
              if (poly.bbox.ur.y > this.bbox.ur.y) this.bbox.ur.y = poly.bbox.ur.y;
              this.polys.push(poly);
            }

            this.isSubject = isSubject;
          }

          _createClass(MultiPolyIn, [{
            key: "getSweepEvents",
            value: function getSweepEvents() {
              var sweepEvents = [];

              for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
                var polySweepEvents = this.polys[i].getSweepEvents();

                for (var j = 0, jMax = polySweepEvents.length; j < jMax; j++) {
                  sweepEvents.push(polySweepEvents[j]);
                }
              }

              return sweepEvents;
            }
          }]);

          return MultiPolyIn;
        }();

        var RingOut = /*#__PURE__*/function () {
          _createClass(RingOut, null, [{
            key: "factory",

            /* Given the segments from the sweep line pass, compute & return a series
             * of closed rings from all the segments marked to be part of the result */
            value: function factory(allSegments) {
              var ringsOut = [];

              for (var i = 0, iMax = allSegments.length; i < iMax; i++) {
                var segment = allSegments[i];
                if (!segment.isInResult() || segment.ringOut) continue;
                var prevEvent = null;
                var event = segment.leftSE;
                var nextEvent = segment.rightSE;
                var events = [event];
                var startingPoint = event.point;
                var intersectionLEs = [];
                /* Walk the chain of linked events to form a closed ring */

                while (true) {
                  prevEvent = event;
                  event = nextEvent;
                  events.push(event);
                  /* Is the ring complete? */

                  if (event.point === startingPoint) break;

                  while (true) {
                    var availableLEs = event.getAvailableLinkedEvents();
                    /* Did we hit a dead end? This shouldn't happen. Indicates some earlier
                     * part of the algorithm malfunctioned... please file a bug report. */

                    if (availableLEs.length === 0) {
                      var firstPt = events[0].point;
                      var lastPt = events[events.length - 1].point;
                      throw new Error("Unable to complete output ring starting at [".concat(firstPt.x, ",") + " ".concat(firstPt.y, "]. Last matching segment found ends at") + " [".concat(lastPt.x, ", ").concat(lastPt.y, "]."));
                    }
                    /* Only one way to go, so cotinue on the path */


                    if (availableLEs.length === 1) {
                      nextEvent = availableLEs[0].otherSE;
                      break;
                    }
                    /* We must have an intersection. Check for a completed loop */


                    var indexLE = null;

                    for (var j = 0, jMax = intersectionLEs.length; j < jMax; j++) {
                      if (intersectionLEs[j].point === event.point) {
                        indexLE = j;
                        break;
                      }
                    }
                    /* Found a completed loop. Cut that off and make a ring */


                    if (indexLE !== null) {
                      var intersectionLE = intersectionLEs.splice(indexLE)[0];
                      var ringEvents = events.splice(intersectionLE.index);
                      ringEvents.unshift(ringEvents[0].otherSE);
                      ringsOut.push(new RingOut(ringEvents.reverse()));
                      continue;
                    }
                    /* register the intersection */


                    intersectionLEs.push({
                      index: events.length,
                      point: event.point
                    });
                    /* Choose the left-most option to continue the walk */

                    var comparator = event.getLeftmostComparator(prevEvent);
                    nextEvent = availableLEs.sort(comparator)[0].otherSE;
                    break;
                  }
                }

                ringsOut.push(new RingOut(events));
              }

              return ringsOut;
            }
          }]);

          function RingOut(events) {
            _classCallCheck(this, RingOut);

            this.events = events;

            for (var i = 0, iMax = events.length; i < iMax; i++) {
              events[i].segment.ringOut = this;
            }

            this.poly = null;
          }

          _createClass(RingOut, [{
            key: "getGeom",
            value: function getGeom() {
              // Remove superfluous points (ie extra points along a straight line),
              var prevPt = this.events[0].point;
              var points = [prevPt];

              for (var i = 1, iMax = this.events.length - 1; i < iMax; i++) {
                var _pt = this.events[i].point;
                var _nextPt = this.events[i + 1].point;
                if (compareVectorAngles(_pt, prevPt, _nextPt) === 0) continue;
                points.push(_pt);
                prevPt = _pt;
              } // ring was all (within rounding error of angle calc) colinear points


              if (points.length === 1) return null; // check if the starting point is necessary

              var pt = points[0];
              var nextPt = points[1];
              if (compareVectorAngles(pt, prevPt, nextPt) === 0) points.shift();
              points.push(points[0]);
              var step = this.isExteriorRing() ? 1 : -1;
              var iStart = this.isExteriorRing() ? 0 : points.length - 1;
              var iEnd = this.isExteriorRing() ? points.length : -1;
              var orderedPoints = [];

              for (var _i = iStart; _i != iEnd; _i += step) {
                orderedPoints.push([points[_i].x, points[_i].y]);
              }

              return orderedPoints;
            }
          }, {
            key: "isExteriorRing",
            value: function isExteriorRing() {
              if (this._isExteriorRing === undefined) {
                var enclosing = this.enclosingRing();
                this._isExteriorRing = enclosing ? !enclosing.isExteriorRing() : true;
              }

              return this._isExteriorRing;
            }
          }, {
            key: "enclosingRing",
            value: function enclosingRing() {
              if (this._enclosingRing === undefined) {
                this._enclosingRing = this._calcEnclosingRing();
              }

              return this._enclosingRing;
            }
            /* Returns the ring that encloses this one, if any */

          }, {
            key: "_calcEnclosingRing",
            value: function _calcEnclosingRing() {
              // start with the ealier sweep line event so that the prevSeg
              // chain doesn't lead us inside of a loop of ours
              var leftMostEvt = this.events[0];

              for (var i = 1, iMax = this.events.length; i < iMax; i++) {
                var evt = this.events[i];
                if (SweepEvent.compare(leftMostEvt, evt) > 0) leftMostEvt = evt;
              }

              var prevSeg = leftMostEvt.segment.prevInResult();
              var prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;

              while (true) {
                // no segment found, thus no ring can enclose us
                if (!prevSeg) return null; // no segments below prev segment found, thus the ring of the prev
                // segment must loop back around and enclose us

                if (!prevPrevSeg) return prevSeg.ringOut; // if the two segments are of different rings, the ring of the prev
                // segment must either loop around us or the ring of the prev prev
                // seg, which would make us and the ring of the prev peers

                if (prevPrevSeg.ringOut !== prevSeg.ringOut) {
                  if (prevPrevSeg.ringOut.enclosingRing() !== prevSeg.ringOut) {
                    return prevSeg.ringOut;
                  } else return prevSeg.ringOut.enclosingRing();
                } // two segments are from the same ring, so this was a penisula
                // of that ring. iterate downward, keep searching


                prevSeg = prevPrevSeg.prevInResult();
                prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
              }
            }
          }]);

          return RingOut;
        }();

        var PolyOut = /*#__PURE__*/function () {
          function PolyOut(exteriorRing) {
            _classCallCheck(this, PolyOut);

            this.exteriorRing = exteriorRing;
            exteriorRing.poly = this;
            this.interiorRings = [];
          }

          _createClass(PolyOut, [{
            key: "addInterior",
            value: function addInterior(ring) {
              this.interiorRings.push(ring);
              ring.poly = this;
            }
          }, {
            key: "getGeom",
            value: function getGeom() {
              var geom = [this.exteriorRing.getGeom()]; // exterior ring was all (within rounding error of angle calc) colinear points

              if (geom[0] === null) return null;

              for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
                var ringGeom = this.interiorRings[i].getGeom(); // interior ring was all (within rounding error of angle calc) colinear points

                if (ringGeom === null) continue;
                geom.push(ringGeom);
              }

              return geom;
            }
          }]);

          return PolyOut;
        }();

        var MultiPolyOut = /*#__PURE__*/function () {
          function MultiPolyOut(rings) {
            _classCallCheck(this, MultiPolyOut);

            this.rings = rings;
            this.polys = this._composePolys(rings);
          }

          _createClass(MultiPolyOut, [{
            key: "getGeom",
            value: function getGeom() {
              var geom = [];

              for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
                var polyGeom = this.polys[i].getGeom(); // exterior ring was all (within rounding error of angle calc) colinear points

                if (polyGeom === null) continue;
                geom.push(polyGeom);
              }

              return geom;
            }
          }, {
            key: "_composePolys",
            value: function _composePolys(rings) {
              var polys = [];

              for (var i = 0, iMax = rings.length; i < iMax; i++) {
                var ring = rings[i];
                if (ring.poly) continue;
                if (ring.isExteriorRing()) polys.push(new PolyOut(ring));else {
                  var enclosingRing = ring.enclosingRing();
                  if (!enclosingRing.poly) polys.push(new PolyOut(enclosingRing));
                  enclosingRing.poly.addInterior(ring);
                }
              }

              return polys;
            }
          }]);

          return MultiPolyOut;
        }();
        /**
         * NOTE:  We must be careful not to change any segments while
         *        they are in the SplayTree. AFAIK, there's no way to tell
         *        the tree to rebalance itself - thus before splitting
         *        a segment that's in the tree, we remove it from the tree,
         *        do the split, then re-insert it. (Even though splitting a
         *        segment *shouldn't* change its correct position in the
         *        sweep line tree, the reality is because of rounding errors,
         *        it sometimes does.)
         */


        var SweepLine = /*#__PURE__*/function () {
          function SweepLine(queue) {
            var comparator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : Segment.compare;

            _classCallCheck(this, SweepLine);

            this.queue = queue;
            this.tree = new Tree(comparator);
            this.segments = [];
          }

          _createClass(SweepLine, [{
            key: "process",
            value: function process(event) {
              var segment = event.segment;
              var newEvents = []; // if we've already been consumed by another segment,
              // clean up our body parts and get out

              if (event.consumedBy) {
                if (event.isLeft) this.queue.remove(event.otherSE);else this.tree.remove(segment);
                return newEvents;
              }

              var node = event.isLeft ? this.tree.insert(segment) : this.tree.find(segment);
              if (!node) throw new Error("Unable to find segment #".concat(segment.id, " ") + "[".concat(segment.leftSE.point.x, ", ").concat(segment.leftSE.point.y, "] -> ") + "[".concat(segment.rightSE.point.x, ", ").concat(segment.rightSE.point.y, "] ") + 'in SweepLine tree. Please submit a bug report.');
              var prevNode = node;
              var nextNode = node;
              var prevSeg = undefined;
              var nextSeg = undefined; // skip consumed segments still in tree

              while (prevSeg === undefined) {
                prevNode = this.tree.prev(prevNode);
                if (prevNode === null) prevSeg = null;else if (prevNode.key.consumedBy === undefined) prevSeg = prevNode.key;
              } // skip consumed segments still in tree


              while (nextSeg === undefined) {
                nextNode = this.tree.next(nextNode);
                if (nextNode === null) nextSeg = null;else if (nextNode.key.consumedBy === undefined) nextSeg = nextNode.key;
              }

              if (event.isLeft) {
                // Check for intersections against the previous segment in the sweep line
                var prevMySplitter = null;

                if (prevSeg) {
                  var prevInter = prevSeg.getIntersection(segment);

                  if (prevInter !== null) {
                    if (!segment.isAnEndpoint(prevInter)) prevMySplitter = prevInter;

                    if (!prevSeg.isAnEndpoint(prevInter)) {
                      var newEventsFromSplit = this._splitSafely(prevSeg, prevInter);

                      for (var i = 0, iMax = newEventsFromSplit.length; i < iMax; i++) {
                        newEvents.push(newEventsFromSplit[i]);
                      }
                    }
                  }
                } // Check for intersections against the next segment in the sweep line


                var nextMySplitter = null;

                if (nextSeg) {
                  var nextInter = nextSeg.getIntersection(segment);

                  if (nextInter !== null) {
                    if (!segment.isAnEndpoint(nextInter)) nextMySplitter = nextInter;

                    if (!nextSeg.isAnEndpoint(nextInter)) {
                      var _newEventsFromSplit = this._splitSafely(nextSeg, nextInter);

                      for (var _i = 0, _iMax = _newEventsFromSplit.length; _i < _iMax; _i++) {
                        newEvents.push(_newEventsFromSplit[_i]);
                      }
                    }
                  }
                } // For simplicity, even if we find more than one intersection we only
                // spilt on the 'earliest' (sweep-line style) of the intersections.
                // The other intersection will be handled in a future process().


                if (prevMySplitter !== null || nextMySplitter !== null) {
                  var mySplitter = null;
                  if (prevMySplitter === null) mySplitter = nextMySplitter;else if (nextMySplitter === null) mySplitter = prevMySplitter;else {
                    var cmpSplitters = SweepEvent.comparePoints(prevMySplitter, nextMySplitter);
                    mySplitter = cmpSplitters <= 0 ? prevMySplitter : nextMySplitter;
                  } // Rounding errors can cause changes in ordering,
                  // so remove afected segments and right sweep events before splitting

                  this.queue.remove(segment.rightSE);
                  newEvents.push(segment.rightSE);

                  var _newEventsFromSplit2 = segment.split(mySplitter);

                  for (var _i2 = 0, _iMax2 = _newEventsFromSplit2.length; _i2 < _iMax2; _i2++) {
                    newEvents.push(_newEventsFromSplit2[_i2]);
                  }
                }

                if (newEvents.length > 0) {
                  // We found some intersections, so re-do the current event to
                  // make sure sweep line ordering is totally consistent for later
                  // use with the segment 'prev' pointers
                  this.tree.remove(segment);
                  newEvents.push(event);
                } else {
                  // done with left event
                  this.segments.push(segment);
                  segment.prev = prevSeg;
                }
              } else {
                // event.isRight
                // since we're about to be removed from the sweep line, check for
                // intersections between our previous and next segments
                if (prevSeg && nextSeg) {
                  var inter = prevSeg.getIntersection(nextSeg);

                  if (inter !== null) {
                    if (!prevSeg.isAnEndpoint(inter)) {
                      var _newEventsFromSplit3 = this._splitSafely(prevSeg, inter);

                      for (var _i3 = 0, _iMax3 = _newEventsFromSplit3.length; _i3 < _iMax3; _i3++) {
                        newEvents.push(_newEventsFromSplit3[_i3]);
                      }
                    }

                    if (!nextSeg.isAnEndpoint(inter)) {
                      var _newEventsFromSplit4 = this._splitSafely(nextSeg, inter);

                      for (var _i4 = 0, _iMax4 = _newEventsFromSplit4.length; _i4 < _iMax4; _i4++) {
                        newEvents.push(_newEventsFromSplit4[_i4]);
                      }
                    }
                  }
                }

                this.tree.remove(segment);
              }

              return newEvents;
            }
            /* Safely split a segment that is currently in the datastructures
             * IE - a segment other than the one that is currently being processed. */

          }, {
            key: "_splitSafely",
            value: function _splitSafely(seg, pt) {
              // Rounding errors can cause changes in ordering,
              // so remove afected segments and right sweep events before splitting
              // removeNode() doesn't work, so have re-find the seg
              // https://github.com/w8r/splay-tree/pull/5
              this.tree.remove(seg);
              var rightSE = seg.rightSE;
              this.queue.remove(rightSE);
              var newEvents = seg.split(pt);
              newEvents.push(rightSE); // splitting can trigger consumption

              if (seg.consumedBy === undefined) this.tree.insert(seg);
              return newEvents;
            }
          }]);

          return SweepLine;
        }();

        var POLYGON_CLIPPING_MAX_QUEUE_SIZE = typeof process !== 'undefined' && process.env.POLYGON_CLIPPING_MAX_QUEUE_SIZE || 1000000;
        var POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS = typeof process !== 'undefined' && process.env.POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS || 1000000;

        var Operation = /*#__PURE__*/function () {
          function Operation() {
            _classCallCheck(this, Operation);
          }

          _createClass(Operation, [{
            key: "run",
            value: function run(type, geom, moreGeoms) {
              operation.type = type;
              rounder.reset();
              /* Convert inputs to MultiPoly objects */

              var multipolys = [new MultiPolyIn(geom, true)];

              for (var i = 0, iMax = moreGeoms.length; i < iMax; i++) {
                multipolys.push(new MultiPolyIn(moreGeoms[i], false));
              }

              operation.numMultiPolys = multipolys.length;
              /* BBox optimization for difference operation
               * If the bbox of a multipolygon that's part of the clipping doesn't
               * intersect the bbox of the subject at all, we can just drop that
               * multiploygon. */

              if (operation.type === 'difference') {
                // in place removal
                var subject = multipolys[0];
                var _i = 1;

                while (_i < multipolys.length) {
                  if (getBboxOverlap(multipolys[_i].bbox, subject.bbox) !== null) _i++;else multipolys.splice(_i, 1);
                }
              }
              /* BBox optimization for intersection operation
               * If we can find any pair of multipolygons whose bbox does not overlap,
               * then the result will be empty. */


              if (operation.type === 'intersection') {
                // TODO: this is O(n^2) in number of polygons. By sorting the bboxes,
                //       it could be optimized to O(n * ln(n))
                for (var _i2 = 0, _iMax = multipolys.length; _i2 < _iMax; _i2++) {
                  var mpA = multipolys[_i2];

                  for (var j = _i2 + 1, jMax = multipolys.length; j < jMax; j++) {
                    if (getBboxOverlap(mpA.bbox, multipolys[j].bbox) === null) return [];
                  }
                }
              }
              /* Put segment endpoints in a priority queue */


              var queue = new Tree(SweepEvent.compare);

              for (var _i3 = 0, _iMax2 = multipolys.length; _i3 < _iMax2; _i3++) {
                var sweepEvents = multipolys[_i3].getSweepEvents();

                for (var _j = 0, _jMax = sweepEvents.length; _j < _jMax; _j++) {
                  queue.insert(sweepEvents[_j]);

                  if (queue.size > POLYGON_CLIPPING_MAX_QUEUE_SIZE) {
                    // prevents an infinite loop, an otherwise common manifestation of bugs
                    throw new Error('Infinite loop when putting segment endpoints in a priority queue ' + '(queue size too big). Please file a bug report.');
                  }
                }
              }
              /* Pass the sweep line over those endpoints */


              var sweepLine = new SweepLine(queue);
              var prevQueueSize = queue.size;
              var node = queue.pop();

              while (node) {
                var evt = node.key;

                if (queue.size === prevQueueSize) {
                  // prevents an infinite loop, an otherwise common manifestation of bugs
                  var seg = evt.segment;
                  throw new Error("Unable to pop() ".concat(evt.isLeft ? 'left' : 'right', " SweepEvent ") + "[".concat(evt.point.x, ", ").concat(evt.point.y, "] from segment #").concat(seg.id, " ") + "[".concat(seg.leftSE.point.x, ", ").concat(seg.leftSE.point.y, "] -> ") + "[".concat(seg.rightSE.point.x, ", ").concat(seg.rightSE.point.y, "] from queue. ") + 'Please file a bug report.');
                }

                if (queue.size > POLYGON_CLIPPING_MAX_QUEUE_SIZE) {
                  // prevents an infinite loop, an otherwise common manifestation of bugs
                  throw new Error('Infinite loop when passing sweep line over endpoints ' + '(queue size too big). Please file a bug report.');
                }

                if (sweepLine.segments.length > POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS) {
                  // prevents an infinite loop, an otherwise common manifestation of bugs
                  throw new Error('Infinite loop when passing sweep line over endpoints ' + '(too many sweep line segments). Please file a bug report.');
                }

                var newEvents = sweepLine.process(evt);

                for (var _i4 = 0, _iMax3 = newEvents.length; _i4 < _iMax3; _i4++) {
                  var _evt = newEvents[_i4];
                  if (_evt.consumedBy === undefined) queue.insert(_evt);
                }

                prevQueueSize = queue.size;
                node = queue.pop();
              } // free some memory we don't need anymore


              rounder.reset();
              /* Collect and compile segments we're keeping into a multipolygon */

              var ringsOut = RingOut.factory(sweepLine.segments);
              var result = new MultiPolyOut(ringsOut);
              return result.getGeom();
            }
          }]);

          return Operation;
        }(); // singleton available by import


        var operation = new Operation();

        var union = function union(geom) {
          for (var _len = arguments.length, moreGeoms = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
            moreGeoms[_key - 1] = arguments[_key];
          }

          return operation.run('union', geom, moreGeoms);
        };

        var intersection$1 = function intersection(geom) {
          for (var _len2 = arguments.length, moreGeoms = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
            moreGeoms[_key2 - 1] = arguments[_key2];
          }

          return operation.run('intersection', geom, moreGeoms);
        };

        var xor = function xor(geom) {
          for (var _len3 = arguments.length, moreGeoms = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
            moreGeoms[_key3 - 1] = arguments[_key3];
          }

          return operation.run('xor', geom, moreGeoms);
        };

        var difference = function difference(subjectGeom) {
          for (var _len4 = arguments.length, clippingGeoms = new Array(_len4 > 1 ? _len4 - 1 : 0), _key4 = 1; _key4 < _len4; _key4++) {
            clippingGeoms[_key4 - 1] = arguments[_key4];
          }

          return operation.run('difference', subjectGeom, clippingGeoms);
        };

        var index = {
          union: union,
          intersection: intersection$1,
          xor: xor,
          difference: difference
        };

        var geojsonPrecision = createCommonjsModule(function (module) {
          (function () {
            function parse(t, coordinatePrecision, extrasPrecision) {
              function point(p) {
                return p.map(function (e, index) {
                  if (index < 2) {
                    return 1 * e.toFixed(coordinatePrecision);
                  } else {
                    return 1 * e.toFixed(extrasPrecision);
                  }
                });
              }

              function multi(l) {
                return l.map(point);
              }

              function poly(p) {
                return p.map(multi);
              }

              function multiPoly(m) {
                return m.map(poly);
              }

              function geometry(obj) {
                if (!obj) {
                  return {};
                }

                switch (obj.type) {
                  case "Point":
                    obj.coordinates = point(obj.coordinates);
                    return obj;

                  case "LineString":
                  case "MultiPoint":
                    obj.coordinates = multi(obj.coordinates);
                    return obj;

                  case "Polygon":
                  case "MultiLineString":
                    obj.coordinates = poly(obj.coordinates);
                    return obj;

                  case "MultiPolygon":
                    obj.coordinates = multiPoly(obj.coordinates);
                    return obj;

                  case "GeometryCollection":
                    obj.geometries = obj.geometries.map(geometry);
                    return obj;

                  default:
                    return {};
                }
              }

              function feature(obj) {
                obj.geometry = geometry(obj.geometry);
                return obj;
              }

              function featureCollection(f) {
                f.features = f.features.map(feature);
                return f;
              }

              function geometryCollection(g) {
                g.geometries = g.geometries.map(geometry);
                return g;
              }

              if (!t) {
                return t;
              }

              switch (t.type) {
                case "Feature":
                  return feature(t);

                case "GeometryCollection":
                  return geometryCollection(t);

                case "FeatureCollection":
                  return featureCollection(t);

                case "Point":
                case "LineString":
                case "Polygon":
                case "MultiPoint":
                case "MultiPolygon":
                case "MultiLineString":
                  return geometry(t);

                default:
                  return t;
              }
            }

            module.exports = parse;
            module.exports.parse = parse;
          })();
        });

        var FORCED$3 = fails(function () {
          return new Date(NaN).toJSON() !== null
            || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
        });

        // `Date.prototype.toJSON` method
        // https://tc39.es/ecma262/#sec-date.prototype.tojson
        _export({ target: 'Date', proto: true, forced: FORCED$3 }, {
          // eslint-disable-next-line no-unused-vars -- required for `.length`
          toJSON: function toJSON(key) {
            var O = toObject(this);
            var pv = toPrimitive(O);
            return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();
          }
        });

        // `URL.prototype.toJSON` method
        // https://url.spec.whatwg.org/#dom-url-tojson
        _export({ target: 'URL', proto: true, enumerable: true }, {
          toJSON: function toJSON() {
            return URL.prototype.toString.call(this);
          }
        });

        function isObject$3(obj) {
          return _typeof(obj) === 'object' && obj !== null;
        }

        function forEach(obj, cb) {
          if (Array.isArray(obj)) {
            obj.forEach(cb);
          } else if (isObject$3(obj)) {
            Object.keys(obj).forEach(function (key) {
              var val = obj[key];
              cb(val, key);
            });
          }
        }

        function getTreeDepth(obj) {
          var depth = 0;

          if (Array.isArray(obj) || isObject$3(obj)) {
            forEach(obj, function (val) {
              if (Array.isArray(val) || isObject$3(val)) {
                var tmpDepth = getTreeDepth(val);

                if (tmpDepth > depth) {
                  depth = tmpDepth;
                }
              }
            });
            return depth + 1;
          }

          return depth;
        }

        function stringify(obj, options) {
          options = options || {};
          var indent = JSON.stringify([1], null, get(options, 'indent', 2)).slice(2, -3);
          var addMargin = get(options, 'margins', false);
          var addArrayMargin = get(options, 'arrayMargins', false);
          var addObjectMargin = get(options, 'objectMargins', false);
          var maxLength = indent === '' ? Infinity : get(options, 'maxLength', 80);
          var maxNesting = get(options, 'maxNesting', Infinity);
          return function _stringify(obj, currentIndent, reserved) {
            if (obj && typeof obj.toJSON === 'function') {
              obj = obj.toJSON();
            }

            var string = JSON.stringify(obj);

            if (string === undefined) {
              return string;
            }

            var length = maxLength - currentIndent.length - reserved;
            var treeDepth = getTreeDepth(obj);

            if (treeDepth <= maxNesting && string.length <= length) {
              var prettified = prettify(string, {
                addMargin: addMargin,
                addArrayMargin: addArrayMargin,
                addObjectMargin: addObjectMargin
              });

              if (prettified.length <= length) {
                return prettified;
              }
            }

            if (isObject$3(obj)) {
              var nextIndent = currentIndent + indent;
              var items = [];
              var delimiters;

              var comma = function comma(array, index) {
                return index === array.length - 1 ? 0 : 1;
              };

              if (Array.isArray(obj)) {
                for (var index = 0; index < obj.length; index++) {
                  items.push(_stringify(obj[index], nextIndent, comma(obj, index)) || 'null');
                }

                delimiters = '[]';
              } else {
                Object.keys(obj).forEach(function (key, index, array) {
                  var keyPart = JSON.stringify(key) + ': ';

                  var value = _stringify(obj[key], nextIndent, keyPart.length + comma(array, index));

                  if (value !== undefined) {
                    items.push(keyPart + value);
                  }
                });
                delimiters = '{}';
              }

              if (items.length > 0) {
                return [delimiters[0], indent + items.join(',\n' + nextIndent), delimiters[1]].join('\n' + currentIndent);
              }
            }

            return string;
          }(obj, '', 0);
        } // Note: This regex matches even invalid JSON strings, but since we’re
        // working on the output of `JSON.stringify` we know that only valid strings
        // are present (unless the user supplied a weird `options.indent` but in
        // that case we don’t care since the output would be invalid anyway).


        var stringOrChar = /("(?:[^\\"]|\\.)*")|[:,\][}{]/g;

        function prettify(string, options) {
          options = options || {};
          var tokens = {
            '{': '{',
            '}': '}',
            '[': '[',
            ']': ']',
            ',': ', ',
            ':': ': '
          };

          if (options.addMargin || options.addObjectMargin) {
            tokens['{'] = '{ ';
            tokens['}'] = ' }';
          }

          if (options.addMargin || options.addArrayMargin) {
            tokens['['] = '[ ';
            tokens[']'] = ' ]';
          }

          return string.replace(stringOrChar, function (match, string) {
            return string ? match : tokens[match];
          });
        }

        function get(options, name, defaultValue) {
          return name in options ? options[name] : defaultValue;
        }

        var jsonStringifyPrettyCompact = stringify;

        var _default = /*#__PURE__*/function () {
          // constructor
          //
          // `fc`  Optional FeatureCollection of known features
          //
          // Optionally pass a GeoJSON FeatureCollection of known features which we can refer to later.
          // Each feature must have a filename-like `id`, for example: `something.geojson`
          //
          // {
          //   "type": "FeatureCollection"
          //   "features": [
          //     {
          //       "type": "Feature",
          //       "id": "philly_metro.geojson",
          //       "properties": { … },
          //       "geometry": { … }
          //     }
          //   ]
          // }
          function _default(fc) {
            var _this = this;

            _classCallCheck$1(this, _default);

            // The _cache retains resolved features, so if you ask for the same thing multiple times
            // we don't repeat the expensive resolving/clipping operations.
            //
            // Each feature has a stable identifier that is used as the cache key.
            // The identifiers look like:
            // - for point locations, the stringified point:          e.g. '[8.67039,49.41882]'
            // - for geojson locations, the geojson id:               e.g. 'de-hamburg.geojson'
            // - for countrycoder locations, feature.id property:     e.g. 'Q2'  (countrycoder uses Wikidata identifiers)
            // - for aggregated locationSets, +[include]-[exclude]:   e.g '+[Q2]-[Q18,Q27611]'
            this._cache = {}; // When strict mode = true, throw on invalid locations or locationSets.
            // When strict mode = false, return `null` for invalid locations or locationSets.

            this._strict = true; // process input FeatureCollection

            if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
              fc.features.forEach(function (feature) {
                feature.properties = feature.properties || {};
                var props = feature.properties; // Get `id` from either `id` or `properties`

                var id = feature.id || props.id;
                if (!id || !/^\S+\.geojson$/i.test(id)) return; // Ensure `id` exists and is lowercase

                id = id.toLowerCase();
                feature.id = id;
                props.id = id; // Ensure `area` property exists

                if (!props.area) {
                  var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²

                  props.area = Number(area.toFixed(2));
                }

                _this._cache[id] = feature;
              });
            } // Replace CountryCoder world geometry to be a polygon covering the world.


            var world = _cloneDeep(feature$1('Q2'));

            world.geometry = {
              type: 'Polygon',
              coordinates: [[[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]]]
            };
            world.id = 'Q2';
            world.properties.id = 'Q2';
            world.properties.area = geojsonArea.geometry(world.geometry) / 1e6; // m² to km²

            this._cache.Q2 = world;
          } // validateLocation
          // `location`  The location to validate
          //
          // Pass a `location` value to validate
          //
          // Returns a result like:
          //   {
          //     type:     'point', 'geojson', or 'countrycoder'
          //     location:  the queried location
          //     id:        the stable identifier for the feature
          //   }
          // or `null` if the location is invalid
          //


          _createClass$1(_default, [{
            key: "validateLocation",
            value: function validateLocation(location) {
              if (Array.isArray(location) && (location.length === 2 || location.length === 3)) {
                // [lon, lat] or [lon, lat, radius] point?
                var lon = location[0];
                var lat = location[1];
                var radius = location[2];

                if (Number.isFinite(lon) && lon >= -180 && lon <= 180 && Number.isFinite(lat) && lat >= -90 && lat <= 90 && (location.length === 2 || Number.isFinite(radius) && radius > 0)) {
                  var id = '[' + location.toString() + ']';
                  return {
                    type: 'point',
                    location: location,
                    id: id
                  };
                }
              } else if (typeof location === 'string' && /^\S+\.geojson$/i.test(location)) {
                // a .geojson filename?
                var _id = location.toLowerCase();

                if (this._cache[_id]) {
                  return {
                    type: 'geojson',
                    location: location,
                    id: _id
                  };
                }
              } else if (typeof location === 'string' || typeof location === 'number') {
                // a country-coder value?
                var feature = feature$1(location);

                if (feature) {
                  // Use wikidata QID as the identifier, since that seems to be the one
                  // property that everything in CountryCoder is guaranteed to have.
                  var _id2 = feature.properties.wikidata;
                  return {
                    type: 'countrycoder',
                    location: location,
                    id: _id2
                  };
                }
              }

              if (this._strict) {
                throw new Error("validateLocation:  Invalid location: \"".concat(location, "\"."));
              } else {
                return null;
              }
            } // resolveLocation
            // `location`  The location to resolve
            //
            // Pass a `location` value to resolve
            //
            // Returns a result like:
            //   {
            //     type:      'point', 'geojson', or 'countrycoder'
            //     location:  the queried location
            //     id:        a stable identifier for the feature
            //     feature:   the resolved GeoJSON feature
            //   }
            //  or `null` if the location is invalid
            //

          }, {
            key: "resolveLocation",
            value: function resolveLocation(location) {
              var valid = this.validateLocation(location);
              if (!valid) return null;
              var id = valid.id; // Return a result from cache if we can

              if (this._cache[id]) {
                return Object.assign(valid, {
                  feature: this._cache[id]
                });
              } // A [lon,lat] coordinate pair?


              if (valid.type === 'point') {
                var lon = location[0];
                var lat = location[1];
                var radius = location[2] || 25; // km

                var EDGES = 10;
                var PRECISION = 3;
                var area = Math.PI * radius * radius;
                var feature = this._cache[id] = geojsonPrecision({
                  type: 'Feature',
                  id: id,
                  properties: {
                    id: id,
                    area: Number(area.toFixed(2))
                  },
                  geometry: circleToPolygon([lon, lat], radius * 1000, EDGES) // km to m

                }, PRECISION);
                return Object.assign(valid, {
                  feature: feature
                }); // A .geojson filename?
              } else if (valid.type === 'geojson') ; else if (valid.type === 'countrycoder') {
                var _feature = _cloneDeep(feature$1(id));

                var props = _feature.properties; // -> This block of code is weird and requires some explanation. <-
                // CountryCoder includes higher level features which are made up of members.
                // These features don't have their own geometry, but CountryCoder provides an
                //   `aggregateFeature` method to combine these members into a MultiPolygon.
                // In the past, Turf/JSTS/martinez could not handle the aggregated features,
                //   so we'd iteratively union them all together.  (this was slow)
                // But now mfogel/polygon-clipping handles these MultiPolygons like a boss.
                // This approach also has the benefit of removing all the internal boaders and
                //   simplifying the regional polygons a lot.

                if (Array.isArray(props.members)) {
                  var aggregate = aggregateFeature(id);
                  aggregate.geometry.coordinates = _clip([aggregate], 'UNION').geometry.coordinates;
                  _feature.geometry = aggregate.geometry;
                } // Ensure `area` property exists


                if (!props.area) {
                  var _area = geojsonArea.geometry(_feature.geometry) / 1e6; // m² to km²


                  props.area = Number(_area.toFixed(2));
                } // Ensure `id` property exists


                _feature.id = id;
                props.id = id;
                this._cache[id] = _feature;
                return Object.assign(valid, {
                  feature: _feature
                });
              }

              if (this._strict) {
                throw new Error("resolveLocation:  Couldn't resolve location \"".concat(location, "\"."));
              } else {
                return null;
              }
            } // validateLocationSet
            // `locationSet`  the locationSet to validate
            //
            // Pass a locationSet Object to validate like:
            //   {
            //     include: [ Array of locations ],
            //     exclude: [ Array of locations ]
            //   }
            //
            // Returns a result like:
            //   {
            //     type:         'locationset'
            //     locationSet:  the queried locationSet
            //     id:           the stable identifier for the feature
            //   }
            // or `null` if the locationSet is invalid
            //

          }, {
            key: "validateLocationSet",
            value: function validateLocationSet(locationSet) {
              locationSet = locationSet || {};
              var validator = this.validateLocation.bind(this);
              var include = (locationSet.include || []).map(validator).filter(Boolean);
              var exclude = (locationSet.exclude || []).map(validator).filter(Boolean);

              if (!include.length) {
                if (this._strict) {
                  throw new Error("validateLocationSet:  LocationSet includes nothing.");
                } else {
                  // non-strict mode, replace an empty locationSet with one that includes "the world"
                  locationSet.include = ['Q2'];
                  include = [{
                    type: 'countrycoder',
                    location: 'Q2',
                    id: 'Q2'
                  }];
                }
              } // Generate stable identifier


              include.sort(_sortLocations);
              var id = '+[' + include.map(function (d) {
                return d.id;
              }).join(',') + ']';

              if (exclude.length) {
                exclude.sort(_sortLocations);
                id += '-[' + exclude.map(function (d) {
                  return d.id;
                }).join(',') + ']';
              }

              return {
                type: 'locationset',
                locationSet: locationSet,
                id: id
              };
            } // resolveLocationSet
            // `locationSet`  the locationSet to resolve
            //
            // Pass a locationSet Object to validate like:
            //   {
            //     include: [ Array of locations ],
            //     exclude: [ Array of locations ]
            //   }
            //
            // Returns a result like:
            //   {
            //     type:         'locationset'
            //     locationSet:  the queried locationSet
            //     id:           the stable identifier for the feature
            //     feature:      the resolved GeoJSON feature
            //   }
            // or `null` if the locationSet is invalid
            //

          }, {
            key: "resolveLocationSet",
            value: function resolveLocationSet(locationSet) {
              locationSet = locationSet || {};
              var valid = this.validateLocationSet(locationSet);
              if (!valid) return null;
              var id = valid.id; // Return a result from cache if we can

              if (this._cache[id]) {
                return Object.assign(valid, {
                  feature: this._cache[id]
                });
              }

              var resolver = this.resolveLocation.bind(this);
              var includes = (locationSet.include || []).map(resolver).filter(Boolean);
              var excludes = (locationSet.exclude || []).map(resolver).filter(Boolean); // Return quickly if it's a single included location..

              if (includes.length === 1 && excludes.length === 0) {
                return Object.assign(valid, {
                  feature: includes[0].feature
                });
              } // Calculate unions


              var includeGeoJSON = _clip(includes.map(function (d) {
                return d.feature;
              }), 'UNION');

              var excludeGeoJSON = _clip(excludes.map(function (d) {
                return d.feature;
              }), 'UNION'); // Calculate difference, update `area` and return result


              var resultGeoJSON = excludeGeoJSON ? _clip([includeGeoJSON, excludeGeoJSON], 'DIFFERENCE') : includeGeoJSON;
              var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6; // m² to km²

              resultGeoJSON.id = id;
              resultGeoJSON.properties = {
                id: id,
                area: Number(area.toFixed(2))
              };
              this._cache[id] = resultGeoJSON;
              return Object.assign(valid, {
                feature: resultGeoJSON
              });
            } // strict
            //

          }, {
            key: "strict",
            value: function strict(val) {
              if (val === undefined) {
                // get
                return this._strict;
              } else {
                // set
                this._strict = val;
                return this;
              }
            } // cache
            // convenience method to access the internal cache

          }, {
            key: "cache",
            value: function cache() {
              return this._cache;
            } // stringify
            // convenience method to prettyStringify the given object

          }, {
            key: "stringify",
            value: function stringify(obj, options) {
              return jsonStringifyPrettyCompact(obj, options);
            }
          }]);

          return _default;
        }(); // Wrap the mfogel/polygon-clipping library and return a GeoJSON feature.

        function _clip(features, which) {
          if (!Array.isArray(features) || !features.length) return null;
          var fn = {
            UNION: index.union,
            DIFFERENCE: index.difference
          }[which];
          var args = features.map(function (feature) {
            return feature.geometry.coordinates;
          });
          var coords = fn.apply(null, args);
          return {
            type: 'Feature',
            properties: {},
            geometry: {
              type: whichType(coords),
              coordinates: coords
            }
          }; // is this a Polygon or a MultiPolygon?

          function whichType(coords) {
            var a = Array.isArray(coords);
            var b = a && Array.isArray(coords[0]);
            var c = b && Array.isArray(coords[0][0]);
            var d = c && Array.isArray(coords[0][0][0]);
            return d ? 'MultiPolygon' : 'Polygon';
          }
        }

        function _cloneDeep(obj) {
          return JSON.parse(JSON.stringify(obj));
        } // Sorting the location lists is ok because they end up unioned together.
        // This sorting makes it possible to generate a deterministic id.


        function _sortLocations(a, b) {
          var rank = {
            countrycoder: 1,
            geojson: 2,
            point: 3
          };
          var aRank = rank[a.type];
          var bRank = rank[b.type];
          return aRank > bRank ? 1 : aRank < bRank ? -1 : a.id.localeCompare(b.id);
        }

        // `Number.MAX_SAFE_INTEGER` constant
        // https://tc39.es/ecma262/#sec-number.max_safe_integer
        _export({ target: 'Number', stat: true }, {
          MAX_SAFE_INTEGER: 0x1FFFFFFFFFFFFF
        });

        var aesJs = createCommonjsModule(function (module, exports) {
          (function (root) {

            function checkInt(value) {
              return parseInt(value) === value;
            }

            function checkInts(arrayish) {
              if (!checkInt(arrayish.length)) {
                return false;
              }

              for (var i = 0; i < arrayish.length; i++) {
                if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
                  return false;
                }
              }

              return true;
            }

            function coerceArray(arg, copy) {
              // ArrayBuffer view
              if (arg.buffer && arg.name === 'Uint8Array') {
                if (copy) {
                  if (arg.slice) {
                    arg = arg.slice();
                  } else {
                    arg = Array.prototype.slice.call(arg);
                  }
                }

                return arg;
              } // It's an array; check it is a valid representation of a byte


              if (Array.isArray(arg)) {
                if (!checkInts(arg)) {
                  throw new Error('Array contains invalid value: ' + arg);
                }

                return new Uint8Array(arg);
              } // Something else, but behaves like an array (maybe a Buffer? Arguments?)


              if (checkInt(arg.length) && checkInts(arg)) {
                return new Uint8Array(arg);
              }

              throw new Error('unsupported array-like object');
            }

            function createArray(length) {
              return new Uint8Array(length);
            }

            function copyArray(sourceArray, targetArray, targetStart, sourceStart, sourceEnd) {
              if (sourceStart != null || sourceEnd != null) {
                if (sourceArray.slice) {
                  sourceArray = sourceArray.slice(sourceStart, sourceEnd);
                } else {
                  sourceArray = Array.prototype.slice.call(sourceArray, sourceStart, sourceEnd);
                }
              }

              targetArray.set(sourceArray, targetStart);
            }

            var convertUtf8 = function () {
              function toBytes(text) {
                var result = [],
                    i = 0;
                text = encodeURI(text);

                while (i < text.length) {
                  var c = text.charCodeAt(i++); // if it is a % sign, encode the following 2 bytes as a hex value

                  if (c === 37) {
                    result.push(parseInt(text.substr(i, 2), 16));
                    i += 2; // otherwise, just the actual byte
                  } else {
                    result.push(c);
                  }
                }

                return coerceArray(result);
              }

              function fromBytes(bytes) {
                var result = [],
                    i = 0;

                while (i < bytes.length) {
                  var c = bytes[i];

                  if (c < 128) {
                    result.push(String.fromCharCode(c));
                    i++;
                  } else if (c > 191 && c < 224) {
                    result.push(String.fromCharCode((c & 0x1f) << 6 | bytes[i + 1] & 0x3f));
                    i += 2;
                  } else {
                    result.push(String.fromCharCode((c & 0x0f) << 12 | (bytes[i + 1] & 0x3f) << 6 | bytes[i + 2] & 0x3f));
                    i += 3;
                  }
                }

                return result.join('');
              }

              return {
                toBytes: toBytes,
                fromBytes: fromBytes
              };
            }();

            var convertHex = function () {
              function toBytes(text) {
                var result = [];

                for (var i = 0; i < text.length; i += 2) {
                  result.push(parseInt(text.substr(i, 2), 16));
                }

                return result;
              } // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html


              var Hex = '0123456789abcdef';

              function fromBytes(bytes) {
                var result = [];

                for (var i = 0; i < bytes.length; i++) {
                  var v = bytes[i];
                  result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
                }

                return result.join('');
              }

              return {
                toBytes: toBytes,
                fromBytes: fromBytes
              };
            }(); // Number of rounds by keysize


            var numberOfRounds = {
              16: 10,
              24: 12,
              32: 14
            }; // Round constant words

            var rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91]; // S-box and Inverse S-box (S is for Substitution)

            var S = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16];
            var Si = [0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d]; // Transformations for encryption

            var T1 = [0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d, 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b, 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f, 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb, 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c, 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a, 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81, 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504, 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395, 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4, 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818, 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12, 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a, 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a];
            var T2 = [0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5, 0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b, 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, 0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0, 0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0, 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, 0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc, 0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515, 0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a, 0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, 0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0, 0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484, 0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded, 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, 0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf, 0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585, 0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f, 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, 0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5, 0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2, 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, 0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373, 0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888, 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, 0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c, 0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979, 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, 0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808, 0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6, 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, 0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e, 0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e, 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, 0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf, 0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868, 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616];
            var T3 = [0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5, 0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b, 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, 0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0, 0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0, 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, 0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15, 0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a, 0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, 0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0, 0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384, 0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed, 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, 0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf, 0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185, 0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f, 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, 0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5, 0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2, 0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec, 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, 0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673, 0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88, 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, 0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb, 0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c, 0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279, 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, 0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008, 0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6, 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, 0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e, 0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e, 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, 0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df, 0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068, 0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f, 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16];
            var T4 = [0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491, 0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56, 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, 0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb, 0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b, 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, 0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a, 0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f, 0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, 0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b, 0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713, 0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1, 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, 0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85, 0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411, 0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe, 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, 0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1, 0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf, 0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3, 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, 0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6, 0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b, 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, 0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad, 0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8, 0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2, 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, 0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810, 0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197, 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, 0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c, 0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927, 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, 0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5, 0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0, 0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e, 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c]; // Transformations for decryption

            var T5 = [0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a, 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb, 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0, 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742];
            var T6 = [0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, 0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10, 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015, 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, 0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, 0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, 0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, 0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8, 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6, 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, 0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95, 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857];
            var T7 = [0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3, 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, 0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655, 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, 0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, 0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, 0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, 0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, 0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, 0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8];
            var T8 = [0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, 0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9, 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced, 0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4, 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60, 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, 0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, 0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, 0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff, 0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0]; // Transformations for decryption key expansion

            var U1 = [0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3];
            var U2 = [0x00000000, 0x0b0e090d, 0x161c121a, 0x1d121b17, 0x2c382434, 0x27362d39, 0x3a24362e, 0x312a3f23, 0x58704868, 0x537e4165, 0x4e6c5a72, 0x4562537f, 0x74486c5c, 0x7f466551, 0x62547e46, 0x695a774b, 0xb0e090d0, 0xbbee99dd, 0xa6fc82ca, 0xadf28bc7, 0x9cd8b4e4, 0x97d6bde9, 0x8ac4a6fe, 0x81caaff3, 0xe890d8b8, 0xe39ed1b5, 0xfe8ccaa2, 0xf582c3af, 0xc4a8fc8c, 0xcfa6f581, 0xd2b4ee96, 0xd9bae79b, 0x7bdb3bbb, 0x70d532b6, 0x6dc729a1, 0x66c920ac, 0x57e31f8f, 0x5ced1682, 0x41ff0d95, 0x4af10498, 0x23ab73d3, 0x28a57ade, 0x35b761c9, 0x3eb968c4, 0x0f9357e7, 0x049d5eea, 0x198f45fd, 0x12814cf0, 0xcb3bab6b, 0xc035a266, 0xdd27b971, 0xd629b07c, 0xe7038f5f, 0xec0d8652, 0xf11f9d45, 0xfa119448, 0x934be303, 0x9845ea0e, 0x8557f119, 0x8e59f814, 0xbf73c737, 0xb47dce3a, 0xa96fd52d, 0xa261dc20, 0xf6ad766d, 0xfda37f60, 0xe0b16477, 0xebbf6d7a, 0xda955259, 0xd19b5b54, 0xcc894043, 0xc787494e, 0xaedd3e05, 0xa5d33708, 0xb8c12c1f, 0xb3cf2512, 0x82e51a31, 0x89eb133c, 0x94f9082b, 0x9ff70126, 0x464de6bd, 0x4d43efb0, 0x5051f4a7, 0x5b5ffdaa, 0x6a75c289, 0x617bcb84, 0x7c69d093, 0x7767d99e, 0x1e3daed5, 0x1533a7d8, 0x0821bccf, 0x032fb5c2, 0x32058ae1, 0x390b83ec, 0x241998fb, 0x2f1791f6, 0x8d764dd6, 0x867844db, 0x9b6a5fcc, 0x906456c1, 0xa14e69e2, 0xaa4060ef, 0xb7527bf8, 0xbc5c72f5, 0xd50605be, 0xde080cb3, 0xc31a17a4, 0xc8141ea9, 0xf93e218a, 0xf2302887, 0xef223390, 0xe42c3a9d, 0x3d96dd06, 0x3698d40b, 0x2b8acf1c, 0x2084c611, 0x11aef932, 0x1aa0f03f, 0x07b2eb28, 0x0cbce225, 0x65e6956e, 0x6ee89c63, 0x73fa8774, 0x78f48e79, 0x49deb15a, 0x42d0b857, 0x5fc2a340, 0x54ccaa4d, 0xf741ecda, 0xfc4fe5d7, 0xe15dfec0, 0xea53f7cd, 0xdb79c8ee, 0xd077c1e3, 0xcd65daf4, 0xc66bd3f9, 0xaf31a4b2, 0xa43fadbf, 0xb92db6a8, 0xb223bfa5, 0x83098086, 0x8807898b, 0x9515929c, 0x9e1b9b91, 0x47a17c0a, 0x4caf7507, 0x51bd6e10, 0x5ab3671d, 0x6b99583e, 0x60975133, 0x7d854a24, 0x768b4329, 0x1fd13462, 0x14df3d6f, 0x09cd2678, 0x02c32f75, 0x33e91056, 0x38e7195b, 0x25f5024c, 0x2efb0b41, 0x8c9ad761, 0x8794de6c, 0x9a86c57b, 0x9188cc76, 0xa0a2f355, 0xabacfa58, 0xb6bee14f, 0xbdb0e842, 0xd4ea9f09, 0xdfe49604, 0xc2f68d13, 0xc9f8841e, 0xf8d2bb3d, 0xf3dcb230, 0xeecea927, 0xe5c0a02a, 0x3c7a47b1, 0x37744ebc, 0x2a6655ab, 0x21685ca6, 0x10426385, 0x1b4c6a88, 0x065e719f, 0x0d507892, 0x640a0fd9, 0x6f0406d4, 0x72161dc3, 0x791814ce, 0x48322bed, 0x433c22e0, 0x5e2e39f7, 0x552030fa, 0x01ec9ab7, 0x0ae293ba, 0x17f088ad, 0x1cfe81a0, 0x2dd4be83, 0x26dab78e, 0x3bc8ac99, 0x30c6a594, 0x599cd2df, 0x5292dbd2, 0x4f80c0c5, 0x448ec9c8, 0x75a4f6eb, 0x7eaaffe6, 0x63b8e4f1, 0x68b6edfc, 0xb10c0a67, 0xba02036a, 0xa710187d, 0xac1e1170, 0x9d342e53, 0x963a275e, 0x8b283c49, 0x80263544, 0xe97c420f, 0xe2724b02, 0xff605015, 0xf46e5918, 0xc544663b, 0xce4a6f36, 0xd3587421, 0xd8567d2c, 0x7a37a10c, 0x7139a801, 0x6c2bb316, 0x6725ba1b, 0x560f8538, 0x5d018c35, 0x40139722, 0x4b1d9e2f, 0x2247e964, 0x2949e069, 0x345bfb7e, 0x3f55f273, 0x0e7fcd50, 0x0571c45d, 0x1863df4a, 0x136dd647, 0xcad731dc, 0xc1d938d1, 0xdccb23c6, 0xd7c52acb, 0xe6ef15e8, 0xede11ce5, 0xf0f307f2, 0xfbfd0eff, 0x92a779b4, 0x99a970b9, 0x84bb6bae, 0x8fb562a3, 0xbe9f5d80, 0xb591548d, 0xa8834f9a, 0xa38d4697];
            var U3 = [0x00000000, 0x0d0b0e09, 0x1a161c12, 0x171d121b, 0x342c3824, 0x3927362d, 0x2e3a2436, 0x23312a3f, 0x68587048, 0x65537e41, 0x724e6c5a, 0x7f456253, 0x5c74486c, 0x517f4665, 0x4662547e, 0x4b695a77, 0xd0b0e090, 0xddbbee99, 0xcaa6fc82, 0xc7adf28b, 0xe49cd8b4, 0xe997d6bd, 0xfe8ac4a6, 0xf381caaf, 0xb8e890d8, 0xb5e39ed1, 0xa2fe8cca, 0xaff582c3, 0x8cc4a8fc, 0x81cfa6f5, 0x96d2b4ee, 0x9bd9bae7, 0xbb7bdb3b, 0xb670d532, 0xa16dc729, 0xac66c920, 0x8f57e31f, 0x825ced16, 0x9541ff0d, 0x984af104, 0xd323ab73, 0xde28a57a, 0xc935b761, 0xc43eb968, 0xe70f9357, 0xea049d5e, 0xfd198f45, 0xf012814c, 0x6bcb3bab, 0x66c035a2, 0x71dd27b9, 0x7cd629b0, 0x5fe7038f, 0x52ec0d86, 0x45f11f9d, 0x48fa1194, 0x03934be3, 0x0e9845ea, 0x198557f1, 0x148e59f8, 0x37bf73c7, 0x3ab47dce, 0x2da96fd5, 0x20a261dc, 0x6df6ad76, 0x60fda37f, 0x77e0b164, 0x7aebbf6d, 0x59da9552, 0x54d19b5b, 0x43cc8940, 0x4ec78749, 0x05aedd3e, 0x08a5d337, 0x1fb8c12c, 0x12b3cf25, 0x3182e51a, 0x3c89eb13, 0x2b94f908, 0x269ff701, 0xbd464de6, 0xb04d43ef, 0xa75051f4, 0xaa5b5ffd, 0x896a75c2, 0x84617bcb, 0x937c69d0, 0x9e7767d9, 0xd51e3dae, 0xd81533a7, 0xcf0821bc, 0xc2032fb5, 0xe132058a, 0xec390b83, 0xfb241998, 0xf62f1791, 0xd68d764d, 0xdb867844, 0xcc9b6a5f, 0xc1906456, 0xe2a14e69, 0xefaa4060, 0xf8b7527b, 0xf5bc5c72, 0xbed50605, 0xb3de080c, 0xa4c31a17, 0xa9c8141e, 0x8af93e21, 0x87f23028, 0x90ef2233, 0x9de42c3a, 0x063d96dd, 0x0b3698d4, 0x1c2b8acf, 0x112084c6, 0x3211aef9, 0x3f1aa0f0, 0x2807b2eb, 0x250cbce2, 0x6e65e695, 0x636ee89c, 0x7473fa87, 0x7978f48e, 0x5a49deb1, 0x5742d0b8, 0x405fc2a3, 0x4d54ccaa, 0xdaf741ec, 0xd7fc4fe5, 0xc0e15dfe, 0xcdea53f7, 0xeedb79c8, 0xe3d077c1, 0xf4cd65da, 0xf9c66bd3, 0xb2af31a4, 0xbfa43fad, 0xa8b92db6, 0xa5b223bf, 0x86830980, 0x8b880789, 0x9c951592, 0x919e1b9b, 0x0a47a17c, 0x074caf75, 0x1051bd6e, 0x1d5ab367, 0x3e6b9958, 0x33609751, 0x247d854a, 0x29768b43, 0x621fd134, 0x6f14df3d, 0x7809cd26, 0x7502c32f, 0x5633e910, 0x5b38e719, 0x4c25f502, 0x412efb0b, 0x618c9ad7, 0x6c8794de, 0x7b9a86c5, 0x769188cc, 0x55a0a2f3, 0x58abacfa, 0x4fb6bee1, 0x42bdb0e8, 0x09d4ea9f, 0x04dfe496, 0x13c2f68d, 0x1ec9f884, 0x3df8d2bb, 0x30f3dcb2, 0x27eecea9, 0x2ae5c0a0, 0xb13c7a47, 0xbc37744e, 0xab2a6655, 0xa621685c, 0x85104263, 0x881b4c6a, 0x9f065e71, 0x920d5078, 0xd9640a0f, 0xd46f0406, 0xc372161d, 0xce791814, 0xed48322b, 0xe0433c22, 0xf75e2e39, 0xfa552030, 0xb701ec9a, 0xba0ae293, 0xad17f088, 0xa01cfe81, 0x832dd4be, 0x8e26dab7, 0x993bc8ac, 0x9430c6a5, 0xdf599cd2, 0xd25292db, 0xc54f80c0, 0xc8448ec9, 0xeb75a4f6, 0xe67eaaff, 0xf163b8e4, 0xfc68b6ed, 0x67b10c0a, 0x6aba0203, 0x7da71018, 0x70ac1e11, 0x539d342e, 0x5e963a27, 0x498b283c, 0x44802635, 0x0fe97c42, 0x02e2724b, 0x15ff6050, 0x18f46e59, 0x3bc54466, 0x36ce4a6f, 0x21d35874, 0x2cd8567d, 0x0c7a37a1, 0x017139a8, 0x166c2bb3, 0x1b6725ba, 0x38560f85, 0x355d018c, 0x22401397, 0x2f4b1d9e, 0x642247e9, 0x692949e0, 0x7e345bfb, 0x733f55f2, 0x500e7fcd, 0x5d0571c4, 0x4a1863df, 0x47136dd6, 0xdccad731, 0xd1c1d938, 0xc6dccb23, 0xcbd7c52a, 0xe8e6ef15, 0xe5ede11c, 0xf2f0f307, 0xfffbfd0e, 0xb492a779, 0xb999a970, 0xae84bb6b, 0xa38fb562, 0x80be9f5d, 0x8db59154, 0x9aa8834f, 0x97a38d46];
            var U4 = [0x00000000, 0x090d0b0e, 0x121a161c, 0x1b171d12, 0x24342c38, 0x2d392736, 0x362e3a24, 0x3f23312a, 0x48685870, 0x4165537e, 0x5a724e6c, 0x537f4562, 0x6c5c7448, 0x65517f46, 0x7e466254, 0x774b695a, 0x90d0b0e0, 0x99ddbbee, 0x82caa6fc, 0x8bc7adf2, 0xb4e49cd8, 0xbde997d6, 0xa6fe8ac4, 0xaff381ca, 0xd8b8e890, 0xd1b5e39e, 0xcaa2fe8c, 0xc3aff582, 0xfc8cc4a8, 0xf581cfa6, 0xee96d2b4, 0xe79bd9ba, 0x3bbb7bdb, 0x32b670d5, 0x29a16dc7, 0x20ac66c9, 0x1f8f57e3, 0x16825ced, 0x0d9541ff, 0x04984af1, 0x73d323ab, 0x7ade28a5, 0x61c935b7, 0x68c43eb9, 0x57e70f93, 0x5eea049d, 0x45fd198f, 0x4cf01281, 0xab6bcb3b, 0xa266c035, 0xb971dd27, 0xb07cd629, 0x8f5fe703, 0x8652ec0d, 0x9d45f11f, 0x9448fa11, 0xe303934b, 0xea0e9845, 0xf1198557, 0xf8148e59, 0xc737bf73, 0xce3ab47d, 0xd52da96f, 0xdc20a261, 0x766df6ad, 0x7f60fda3, 0x6477e0b1, 0x6d7aebbf, 0x5259da95, 0x5b54d19b, 0x4043cc89, 0x494ec787, 0x3e05aedd, 0x3708a5d3, 0x2c1fb8c1, 0x2512b3cf, 0x1a3182e5, 0x133c89eb, 0x082b94f9, 0x01269ff7, 0xe6bd464d, 0xefb04d43, 0xf4a75051, 0xfdaa5b5f, 0xc2896a75, 0xcb84617b, 0xd0937c69, 0xd99e7767, 0xaed51e3d, 0xa7d81533, 0xbccf0821, 0xb5c2032f, 0x8ae13205, 0x83ec390b, 0x98fb2419, 0x91f62f17, 0x4dd68d76, 0x44db8678, 0x5fcc9b6a, 0x56c19064, 0x69e2a14e, 0x60efaa40, 0x7bf8b752, 0x72f5bc5c, 0x05bed506, 0x0cb3de08, 0x17a4c31a, 0x1ea9c814, 0x218af93e, 0x2887f230, 0x3390ef22, 0x3a9de42c, 0xdd063d96, 0xd40b3698, 0xcf1c2b8a, 0xc6112084, 0xf93211ae, 0xf03f1aa0, 0xeb2807b2, 0xe2250cbc, 0x956e65e6, 0x9c636ee8, 0x877473fa, 0x8e7978f4, 0xb15a49de, 0xb85742d0, 0xa3405fc2, 0xaa4d54cc, 0xecdaf741, 0xe5d7fc4f, 0xfec0e15d, 0xf7cdea53, 0xc8eedb79, 0xc1e3d077, 0xdaf4cd65, 0xd3f9c66b, 0xa4b2af31, 0xadbfa43f, 0xb6a8b92d, 0xbfa5b223, 0x80868309, 0x898b8807, 0x929c9515, 0x9b919e1b, 0x7c0a47a1, 0x75074caf, 0x6e1051bd, 0x671d5ab3, 0x583e6b99, 0x51336097, 0x4a247d85, 0x4329768b, 0x34621fd1, 0x3d6f14df, 0x267809cd, 0x2f7502c3, 0x105633e9, 0x195b38e7, 0x024c25f5, 0x0b412efb, 0xd7618c9a, 0xde6c8794, 0xc57b9a86, 0xcc769188, 0xf355a0a2, 0xfa58abac, 0xe14fb6be, 0xe842bdb0, 0x9f09d4ea, 0x9604dfe4, 0x8d13c2f6, 0x841ec9f8, 0xbb3df8d2, 0xb230f3dc, 0xa927eece, 0xa02ae5c0, 0x47b13c7a, 0x4ebc3774, 0x55ab2a66, 0x5ca62168, 0x63851042, 0x6a881b4c, 0x719f065e, 0x78920d50, 0x0fd9640a, 0x06d46f04, 0x1dc37216, 0x14ce7918, 0x2bed4832, 0x22e0433c, 0x39f75e2e, 0x30fa5520, 0x9ab701ec, 0x93ba0ae2, 0x88ad17f0, 0x81a01cfe, 0xbe832dd4, 0xb78e26da, 0xac993bc8, 0xa59430c6, 0xd2df599c, 0xdbd25292, 0xc0c54f80, 0xc9c8448e, 0xf6eb75a4, 0xffe67eaa, 0xe4f163b8, 0xedfc68b6, 0x0a67b10c, 0x036aba02, 0x187da710, 0x1170ac1e, 0x2e539d34, 0x275e963a, 0x3c498b28, 0x35448026, 0x420fe97c, 0x4b02e272, 0x5015ff60, 0x5918f46e, 0x663bc544, 0x6f36ce4a, 0x7421d358, 0x7d2cd856, 0xa10c7a37, 0xa8017139, 0xb3166c2b, 0xba1b6725, 0x8538560f, 0x8c355d01, 0x97224013, 0x9e2f4b1d, 0xe9642247, 0xe0692949, 0xfb7e345b, 0xf2733f55, 0xcd500e7f, 0xc45d0571, 0xdf4a1863, 0xd647136d, 0x31dccad7, 0x38d1c1d9, 0x23c6dccb, 0x2acbd7c5, 0x15e8e6ef, 0x1ce5ede1, 0x07f2f0f3, 0x0efffbfd, 0x79b492a7, 0x70b999a9, 0x6bae84bb, 0x62a38fb5, 0x5d80be9f, 0x548db591, 0x4f9aa883, 0x4697a38d];

            function convertToInt32(bytes) {
              var result = [];

              for (var i = 0; i < bytes.length; i += 4) {
                result.push(bytes[i] << 24 | bytes[i + 1] << 16 | bytes[i + 2] << 8 | bytes[i + 3]);
              }

              return result;
            }

            var AES = function AES(key) {
              if (!(this instanceof AES)) {
                throw Error('AES must be instanitated with `new`');
              }

              Object.defineProperty(this, 'key', {
                value: coerceArray(key, true)
              });

              this._prepare();
            };

            AES.prototype._prepare = function () {
              var rounds = numberOfRounds[this.key.length];

              if (rounds == null) {
                throw new Error('invalid key size (must be 16, 24 or 32 bytes)');
              } // encryption round keys


              this._Ke = []; // decryption round keys

              this._Kd = [];

              for (var i = 0; i <= rounds; i++) {
                this._Ke.push([0, 0, 0, 0]);

                this._Kd.push([0, 0, 0, 0]);
              }

              var roundKeyCount = (rounds + 1) * 4;
              var KC = this.key.length / 4; // convert the key into ints

              var tk = convertToInt32(this.key); // copy values into round key arrays

              var index;

              for (var i = 0; i < KC; i++) {
                index = i >> 2;
                this._Ke[index][i % 4] = tk[i];
                this._Kd[rounds - index][i % 4] = tk[i];
              } // key expansion (fips-197 section 5.2)


              var rconpointer = 0;
              var t = KC,
                  tt;

              while (t < roundKeyCount) {
                tt = tk[KC - 1];
                tk[0] ^= S[tt >> 16 & 0xFF] << 24 ^ S[tt >> 8 & 0xFF] << 16 ^ S[tt & 0xFF] << 8 ^ S[tt >> 24 & 0xFF] ^ rcon[rconpointer] << 24;
                rconpointer += 1; // key expansion (for non-256 bit)

                if (KC != 8) {
                  for (var i = 1; i < KC; i++) {
                    tk[i] ^= tk[i - 1];
                  } // key expansion for 256-bit keys is "slightly different" (fips-197)

                } else {
                  for (var i = 1; i < KC / 2; i++) {
                    tk[i] ^= tk[i - 1];
                  }

                  tt = tk[KC / 2 - 1];
                  tk[KC / 2] ^= S[tt & 0xFF] ^ S[tt >> 8 & 0xFF] << 8 ^ S[tt >> 16 & 0xFF] << 16 ^ S[tt >> 24 & 0xFF] << 24;

                  for (var i = KC / 2 + 1; i < KC; i++) {
                    tk[i] ^= tk[i - 1];
                  }
                } // copy values into round key arrays


                var i = 0,
                    r,
                    c;

                while (i < KC && t < roundKeyCount) {
                  r = t >> 2;
                  c = t % 4;
                  this._Ke[r][c] = tk[i];
                  this._Kd[rounds - r][c] = tk[i++];
                  t++;
                }
              } // inverse-cipher-ify the decryption round key (fips-197 section 5.3)


              for (var r = 1; r < rounds; r++) {
                for (var c = 0; c < 4; c++) {
                  tt = this._Kd[r][c];
                  this._Kd[r][c] = U1[tt >> 24 & 0xFF] ^ U2[tt >> 16 & 0xFF] ^ U3[tt >> 8 & 0xFF] ^ U4[tt & 0xFF];
                }
              }
            };

            AES.prototype.encrypt = function (plaintext) {
              if (plaintext.length != 16) {
                throw new Error('invalid plaintext size (must be 16 bytes)');
              }

              var rounds = this._Ke.length - 1;
              var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)

              var t = convertToInt32(plaintext);

              for (var i = 0; i < 4; i++) {
                t[i] ^= this._Ke[0][i];
              } // apply round transforms


              for (var r = 1; r < rounds; r++) {
                for (var i = 0; i < 4; i++) {
                  a[i] = T1[t[i] >> 24 & 0xff] ^ T2[t[(i + 1) % 4] >> 16 & 0xff] ^ T3[t[(i + 2) % 4] >> 8 & 0xff] ^ T4[t[(i + 3) % 4] & 0xff] ^ this._Ke[r][i];
                }

                t = a.slice();
              } // the last round is special


              var result = createArray(16),
                  tt;

              for (var i = 0; i < 4; i++) {
                tt = this._Ke[rounds][i];
                result[4 * i] = (S[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
                result[4 * i + 1] = (S[t[(i + 1) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
                result[4 * i + 2] = (S[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
                result[4 * i + 3] = (S[t[(i + 3) % 4] & 0xff] ^ tt) & 0xff;
              }

              return result;
            };

            AES.prototype.decrypt = function (ciphertext) {
              if (ciphertext.length != 16) {
                throw new Error('invalid ciphertext size (must be 16 bytes)');
              }

              var rounds = this._Kd.length - 1;
              var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)

              var t = convertToInt32(ciphertext);

              for (var i = 0; i < 4; i++) {
                t[i] ^= this._Kd[0][i];
              } // apply round transforms


              for (var r = 1; r < rounds; r++) {
                for (var i = 0; i < 4; i++) {
                  a[i] = T5[t[i] >> 24 & 0xff] ^ T6[t[(i + 3) % 4] >> 16 & 0xff] ^ T7[t[(i + 2) % 4] >> 8 & 0xff] ^ T8[t[(i + 1) % 4] & 0xff] ^ this._Kd[r][i];
                }

                t = a.slice();
              } // the last round is special


              var result = createArray(16),
                  tt;

              for (var i = 0; i < 4; i++) {
                tt = this._Kd[rounds][i];
                result[4 * i] = (Si[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
                result[4 * i + 1] = (Si[t[(i + 3) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
                result[4 * i + 2] = (Si[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
                result[4 * i + 3] = (Si[t[(i + 1) % 4] & 0xff] ^ tt) & 0xff;
              }

              return result;
            };
            /**
             *  Mode Of Operation - Electonic Codebook (ECB)
             */


            var ModeOfOperationECB = function ModeOfOperationECB(key) {
              if (!(this instanceof ModeOfOperationECB)) {
                throw Error('AES must be instanitated with `new`');
              }

              this.description = "Electronic Code Block";
              this.name = "ecb";
              this._aes = new AES(key);
            };

            ModeOfOperationECB.prototype.encrypt = function (plaintext) {
              plaintext = coerceArray(plaintext);

              if (plaintext.length % 16 !== 0) {
                throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
              }

              var ciphertext = createArray(plaintext.length);
              var block = createArray(16);

              for (var i = 0; i < plaintext.length; i += 16) {
                copyArray(plaintext, block, 0, i, i + 16);
                block = this._aes.encrypt(block);
                copyArray(block, ciphertext, i);
              }

              return ciphertext;
            };

            ModeOfOperationECB.prototype.decrypt = function (ciphertext) {
              ciphertext = coerceArray(ciphertext);

              if (ciphertext.length % 16 !== 0) {
                throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
              }

              var plaintext = createArray(ciphertext.length);
              var block = createArray(16);

              for (var i = 0; i < ciphertext.length; i += 16) {
                copyArray(ciphertext, block, 0, i, i + 16);
                block = this._aes.decrypt(block);
                copyArray(block, plaintext, i);
              }

              return plaintext;
            };
            /**
             *  Mode Of Operation - Cipher Block Chaining (CBC)
             */


            var ModeOfOperationCBC = function ModeOfOperationCBC(key, iv) {
              if (!(this instanceof ModeOfOperationCBC)) {
                throw Error('AES must be instanitated with `new`');
              }

              this.description = "Cipher Block Chaining";
              this.name = "cbc";

              if (!iv) {
                iv = createArray(16);
              } else if (iv.length != 16) {
                throw new Error('invalid initialation vector size (must be 16 bytes)');
              }

              this._lastCipherblock = coerceArray(iv, true);
              this._aes = new AES(key);
            };

            ModeOfOperationCBC.prototype.encrypt = function (plaintext) {
              plaintext = coerceArray(plaintext);

              if (plaintext.length % 16 !== 0) {
                throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
              }

              var ciphertext = createArray(plaintext.length);
              var block = createArray(16);

              for (var i = 0; i < plaintext.length; i += 16) {
                copyArray(plaintext, block, 0, i, i + 16);

                for (var j = 0; j < 16; j++) {
                  block[j] ^= this._lastCipherblock[j];
                }

                this._lastCipherblock = this._aes.encrypt(block);
                copyArray(this._lastCipherblock, ciphertext, i);
              }

              return ciphertext;
            };

            ModeOfOperationCBC.prototype.decrypt = function (ciphertext) {
              ciphertext = coerceArray(ciphertext);

              if (ciphertext.length % 16 !== 0) {
                throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
              }

              var plaintext = createArray(ciphertext.length);
              var block = createArray(16);

              for (var i = 0; i < ciphertext.length; i += 16) {
                copyArray(ciphertext, block, 0, i, i + 16);
                block = this._aes.decrypt(block);

                for (var j = 0; j < 16; j++) {
                  plaintext[i + j] = block[j] ^ this._lastCipherblock[j];
                }

                copyArray(ciphertext, this._lastCipherblock, 0, i, i + 16);
              }

              return plaintext;
            };
            /**
             *  Mode Of Operation - Cipher Feedback (CFB)
             */


            var ModeOfOperationCFB = function ModeOfOperationCFB(key, iv, segmentSize) {
              if (!(this instanceof ModeOfOperationCFB)) {
                throw Error('AES must be instanitated with `new`');
              }

              this.description = "Cipher Feedback";
              this.name = "cfb";

              if (!iv) {
                iv = createArray(16);
              } else if (iv.length != 16) {
                throw new Error('invalid initialation vector size (must be 16 size)');
              }

              if (!segmentSize) {
                segmentSize = 1;
              }

              this.segmentSize = segmentSize;
              this._shiftRegister = coerceArray(iv, true);
              this._aes = new AES(key);
            };

            ModeOfOperationCFB.prototype.encrypt = function (plaintext) {
              if (plaintext.length % this.segmentSize != 0) {
                throw new Error('invalid plaintext size (must be segmentSize bytes)');
              }

              var encrypted = coerceArray(plaintext, true);
              var xorSegment;

              for (var i = 0; i < encrypted.length; i += this.segmentSize) {
                xorSegment = this._aes.encrypt(this._shiftRegister);

                for (var j = 0; j < this.segmentSize; j++) {
                  encrypted[i + j] ^= xorSegment[j];
                } // Shift the register


                copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
                copyArray(encrypted, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
              }

              return encrypted;
            };

            ModeOfOperationCFB.prototype.decrypt = function (ciphertext) {
              if (ciphertext.length % this.segmentSize != 0) {
                throw new Error('invalid ciphertext size (must be segmentSize bytes)');
              }

              var plaintext = coerceArray(ciphertext, true);
              var xorSegment;

              for (var i = 0; i < plaintext.length; i += this.segmentSize) {
                xorSegment = this._aes.encrypt(this._shiftRegister);

                for (var j = 0; j < this.segmentSize; j++) {
                  plaintext[i + j] ^= xorSegment[j];
                } // Shift the register


                copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
                copyArray(ciphertext, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
              }

              return plaintext;
            };
            /**
             *  Mode Of Operation - Output Feedback (OFB)
             */


            var ModeOfOperationOFB = function ModeOfOperationOFB(key, iv) {
              if (!(this instanceof ModeOfOperationOFB)) {
                throw Error('AES must be instanitated with `new`');
              }

              this.description = "Output Feedback";
              this.name = "ofb";

              if (!iv) {
                iv = createArray(16);
              } else if (iv.length != 16) {
                throw new Error('invalid initialation vector size (must be 16 bytes)');
              }

              this._lastPrecipher = coerceArray(iv, true);
              this._lastPrecipherIndex = 16;
              this._aes = new AES(key);
            };

            ModeOfOperationOFB.prototype.encrypt = function (plaintext) {
              var encrypted = coerceArray(plaintext, true);

              for (var i = 0; i < encrypted.length; i++) {
                if (this._lastPrecipherIndex === 16) {
                  this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
                  this._lastPrecipherIndex = 0;
                }

                encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
              }

              return encrypted;
            }; // Decryption is symetric


            ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
            /**
             *  Counter object for CTR common mode of operation
             */

            var Counter = function Counter(initialValue) {
              if (!(this instanceof Counter)) {
                throw Error('Counter must be instanitated with `new`');
              } // We allow 0, but anything false-ish uses the default 1


              if (initialValue !== 0 && !initialValue) {
                initialValue = 1;
              }

              if (typeof initialValue === 'number') {
                this._counter = createArray(16);
                this.setValue(initialValue);
              } else {
                this.setBytes(initialValue);
              }
            };

            Counter.prototype.setValue = function (value) {
              if (typeof value !== 'number' || parseInt(value) != value) {
                throw new Error('invalid counter value (must be an integer)');
              } // We cannot safely handle numbers beyond the safe range for integers


              if (value > Number.MAX_SAFE_INTEGER) {
                throw new Error('integer value out of safe range');
              }

              for (var index = 15; index >= 0; --index) {
                this._counter[index] = value % 256;
                value = parseInt(value / 256);
              }
            };

            Counter.prototype.setBytes = function (bytes) {
              bytes = coerceArray(bytes, true);

              if (bytes.length != 16) {
                throw new Error('invalid counter bytes size (must be 16 bytes)');
              }

              this._counter = bytes;
            };

            Counter.prototype.increment = function () {
              for (var i = 15; i >= 0; i--) {
                if (this._counter[i] === 255) {
                  this._counter[i] = 0;
                } else {
                  this._counter[i]++;
                  break;
                }
              }
            };
            /**
             *  Mode Of Operation - Counter (CTR)
             */


            var ModeOfOperationCTR = function ModeOfOperationCTR(key, counter) {
              if (!(this instanceof ModeOfOperationCTR)) {
                throw Error('AES must be instanitated with `new`');
              }

              this.description = "Counter";
              this.name = "ctr";

              if (!(counter instanceof Counter)) {
                counter = new Counter(counter);
              }

              this._counter = counter;
              this._remainingCounter = null;
              this._remainingCounterIndex = 16;
              this._aes = new AES(key);
            };

            ModeOfOperationCTR.prototype.encrypt = function (plaintext) {
              var encrypted = coerceArray(plaintext, true);

              for (var i = 0; i < encrypted.length; i++) {
                if (this._remainingCounterIndex === 16) {
                  this._remainingCounter = this._aes.encrypt(this._counter._counter);
                  this._remainingCounterIndex = 0;

                  this._counter.increment();
                }

                encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
              }

              return encrypted;
            }; // Decryption is symetric


            ModeOfOperationCTR.prototype.decrypt = ModeOfOperationCTR.prototype.encrypt; ///////////////////////
            // Padding
            // See:https://tools.ietf.org/html/rfc2315

            function pkcs7pad(data) {
              data = coerceArray(data, true);
              var padder = 16 - data.length % 16;
              var result = createArray(data.length + padder);
              copyArray(data, result);

              for (var i = data.length; i < result.length; i++) {
                result[i] = padder;
              }

              return result;
            }

            function pkcs7strip(data) {
              data = coerceArray(data, true);

              if (data.length < 16) {
                throw new Error('PKCS#7 invalid length');
              }

              var padder = data[data.length - 1];

              if (padder > 16) {
                throw new Error('PKCS#7 padding byte out of range');
              }

              var length = data.length - padder;

              for (var i = 0; i < padder; i++) {
                if (data[length + i] !== padder) {
                  throw new Error('PKCS#7 invalid padding byte');
                }
              }

              var result = createArray(length);
              copyArray(data, result, 0, 0, length);
              return result;
            } ///////////////////////
            // Exporting
            // The block cipher


            var aesjs = {
              AES: AES,
              Counter: Counter,
              ModeOfOperation: {
                ecb: ModeOfOperationECB,
                cbc: ModeOfOperationCBC,
                cfb: ModeOfOperationCFB,
                ofb: ModeOfOperationOFB,
                ctr: ModeOfOperationCTR
              },
              utils: {
                hex: convertHex,
                utf8: convertUtf8
              },
              padding: {
                pkcs7: {
                  pad: pkcs7pad,
                  strip: pkcs7strip
                }
              },
              _arrayTest: {
                coerceArray: coerceArray,
                createArray: createArray,
                copyArray: copyArray
              }
            }; // node.js

            {
              module.exports = aesjs; // RequireJS/AMD
              // http://www.requirejs.org/docs/api.html
              // https://github.com/amdjs/amdjs-api/wiki/AMD
            }
          })();
        });

        // We can use keys that are 128 bits (16 bytes), 192 bits (24 bytes) or 256 bits (32 bytes).
        // To generate a random key:  window.crypto.getRandomValues(new Uint8Array(16));
        // This default signing key is built into iD and can be used to mask/unmask sensitive values.

        var DEFAULT_128 = [250, 157, 60, 79, 142, 134, 229, 129, 138, 126, 210, 129, 29, 71, 160, 208];
        function utilAesEncrypt(text, key) {
          key = key || DEFAULT_128;
          var textBytes = aesJs.utils.utf8.toBytes(text);
          var aesCtr = new aesJs.ModeOfOperation.ctr(key);
          var encryptedBytes = aesCtr.encrypt(textBytes);
          var encryptedHex = aesJs.utils.hex.fromBytes(encryptedBytes);
          return encryptedHex;
        }
        function utilAesDecrypt(encryptedHex, key) {
          key = key || DEFAULT_128;
          var encryptedBytes = aesJs.utils.hex.toBytes(encryptedHex);
          var aesCtr = new aesJs.ModeOfOperation.ctr(key);
          var decryptedBytes = aesCtr.decrypt(encryptedBytes);
          var text = aesJs.utils.utf8.fromBytes(decryptedBytes);
          return text;
        }

        function utilCleanTags(tags) {
          var out = {};

          for (var k in tags) {
            if (!k) continue;
            var v = tags[k];

            if (v !== undefined) {
              out[k] = cleanValue(k, v);
            }
          }

          return out;

          function cleanValue(k, v) {
            function keepSpaces(k) {
              return /_hours|_times|:conditional$/.test(k);
            }

            function skip(k) {
              return /^(description|note|fixme)$/.test(k);
            }

            if (skip(k)) return v;
            var cleaned = v.split(';').map(function (s) {
              return s.trim();
            }).join(keepSpaces(k) ? '; ' : ';'); // The code below is not intended to validate websites and emails.
            // It is only intended to prevent obvious copy-paste errors. (#2323)
            // clean website- and email-like tags

            if (k.indexOf('website') !== -1 || k.indexOf('email') !== -1 || cleaned.indexOf('http') === 0) {
              cleaned = cleaned.replace(/[\u200B-\u200F\uFEFF]/g, ''); // strip LRM and other zero width chars
            }

            return cleaned;
          }
        }

        var _detected;

        function utilDetect(refresh) {
          if (_detected && !refresh) return _detected;
          _detected = {};
          var ua = navigator.userAgent;
          var m = null;
          /* Browser */

          m = ua.match(/(edge)\/?\s*(\.?\d+(\.\d+)*)/i); // Edge

          if (m !== null) {
            _detected.browser = m[1];
            _detected.version = m[2];
          }

          if (!_detected.browser) {
            m = ua.match(/Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/i); // IE11

            if (m !== null) {
              _detected.browser = 'msie';
              _detected.version = m[1];
            }
          }

          if (!_detected.browser) {
            m = ua.match(/(opr)\/?\s*(\.?\d+(\.\d+)*)/i); // Opera 15+

            if (m !== null) {
              _detected.browser = 'Opera';
              _detected.version = m[2];
            }
          }

          if (!_detected.browser) {
            m = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);

            if (m !== null) {
              _detected.browser = m[1];
              _detected.version = m[2];
              m = ua.match(/version\/([\.\d]+)/i);
              if (m !== null) _detected.version = m[1];
            }
          }

          if (!_detected.browser) {
            _detected.browser = navigator.appName;
            _detected.version = navigator.appVersion;
          } // keep major.minor version only..


          _detected.version = _detected.version.split(/\W/).slice(0, 2).join('.'); // detect other browser capabilities
          // Legacy Opera has incomplete svg style support. See #715

          _detected.opera = _detected.browser.toLowerCase() === 'opera' && parseFloat(_detected.version) < 15;

          if (_detected.browser.toLowerCase() === 'msie') {
            _detected.ie = true;
            _detected.browser = 'Internet Explorer';
            _detected.support = parseFloat(_detected.version) >= 11;
          } else {
            _detected.ie = false;
            _detected.support = true;
          }

          _detected.filedrop = window.FileReader && 'ondrop' in window;
          _detected.download = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
          _detected.cssfilters = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
          /* Platform */

          if (/Win/.test(ua)) {
            _detected.os = 'win';
            _detected.platform = 'Windows';
          } else if (/Mac/.test(ua)) {
            _detected.os = 'mac';
            _detected.platform = 'Macintosh';
          } else if (/X11/.test(ua) || /Linux/.test(ua)) {
            _detected.os = 'linux';
            _detected.platform = 'Linux';
          } else {
            _detected.os = 'win';
            _detected.platform = 'Unknown';
          }

          _detected.isMobileWebKit = (/\b(iPad|iPhone|iPod)\b/.test(ua) || // HACK: iPadOS 13+ requests desktop sites by default by using a Mac user agent,
          // so assume any "mac" with multitouch is actually iOS
          navigator.platform === 'MacIntel' && 'maxTouchPoints' in navigator && navigator.maxTouchPoints > 1) && /WebKit/.test(ua) && !/Edge/.test(ua) && !window.MSStream;
          /* Locale */
          // An array of locales requested by the browser in priority order.

          _detected.browserLocales = Array.from(new Set( // remove duplicates
          [navigator.language].concat(navigator.languages || []).concat([// old property for backwards compatibility
          navigator.userLanguage]) // remove any undefined values
          .filter(Boolean)));
          /* Host */

          var loc = window.top.location;
          var origin = loc.origin;

          if (!origin) {
            // for unpatched IE11
            origin = loc.protocol + '//' + loc.hostname + (loc.port ? ':' + loc.port : '');
          }

          _detected.host = origin + loc.pathname;
          return _detected;
        }

        // Like selection.property('value', ...), but avoids no-op value sets,
        // which can result in layout/repaint thrashing in some situations.
        function utilGetSetValue(selection, value) {
          function d3_selection_value(value) {
            function valueNull() {
              delete this.value;
            }

            function valueConstant() {
              if (this.value !== value) {
                this.value = value;
              }
            }

            function valueFunction() {
              var x = value.apply(this, arguments);

              if (x === null || x === undefined) {
                delete this.value;
              } else if (this.value !== x) {
                this.value = x;
              }
            }

            return value === null || value === undefined ? valueNull : typeof value === 'function' ? valueFunction : valueConstant;
          }

          if (arguments.length === 1) {
            return selection.property('value');
          }

          return selection.each(d3_selection_value(value));
        }

        function utilKeybinding(namespace) {
          var _keybindings = {};

          function testBindings(d3_event, isCapturing) {
            var didMatch = false;
            var bindings = Object.keys(_keybindings).map(function (id) {
              return _keybindings[id];
            });
            var i, binding; // Most key shortcuts will accept either lower or uppercase ('h' or 'H'),
            // so we don't strictly match on the shift key, but we prioritize
            // shifted keybindings first, and fallback to unshifted only if no match.
            // (This lets us differentiate between '←'/'⇧←' or '⌘Z'/'⌘⇧Z')
            // priority match shifted keybindings first

            for (i = 0; i < bindings.length; i++) {
              binding = bindings[i];
              if (!binding.event.modifiers.shiftKey) continue; // no shift

              if (!!binding.capture !== isCapturing) continue;

              if (matches(d3_event, binding, true)) {
                binding.callback(d3_event);
                didMatch = true; // match a max of one binding per event

                break;
              }
            }

            if (didMatch) return; // then unshifted keybindings

            for (i = 0; i < bindings.length; i++) {
              binding = bindings[i];
              if (binding.event.modifiers.shiftKey) continue; // shift

              if (!!binding.capture !== isCapturing) continue;

              if (matches(d3_event, binding, false)) {
                binding.callback(d3_event);
                break;
              }
            }

            function matches(d3_event, binding, testShift) {
              var event = d3_event;
              var isMatch = false;
              var tryKeyCode = true; // Prefer a match on `KeyboardEvent.key`

              if (event.key !== undefined) {
                tryKeyCode = event.key.charCodeAt(0) > 255; // outside ISO-Latin-1

                isMatch = true;

                if (binding.event.key === undefined) {
                  isMatch = false;
                } else if (Array.isArray(binding.event.key)) {
                  if (binding.event.key.map(function (s) {
                    return s.toLowerCase();
                  }).indexOf(event.key.toLowerCase()) === -1) {
                    isMatch = false;
                  }
                } else {
                  if (event.key.toLowerCase() !== binding.event.key.toLowerCase()) {
                    isMatch = false;
                  }
                }
              } // Fallback match on `KeyboardEvent.keyCode`, can happen if:
              // - browser doesn't support `KeyboardEvent.key`
              // - `KeyboardEvent.key` is outside ISO-Latin-1 range (cyrillic?)


              if (!isMatch && tryKeyCode) {
                isMatch = event.keyCode === binding.event.keyCode;
              }

              if (!isMatch) return false; // test modifier keys

              if (!(event.ctrlKey && event.altKey)) {
                // if both are set, assume AltGr and skip it - #4096
                if (event.ctrlKey !== binding.event.modifiers.ctrlKey) return false;
                if (event.altKey !== binding.event.modifiers.altKey) return false;
              }

              if (event.metaKey !== binding.event.modifiers.metaKey) return false;
              if (testShift && event.shiftKey !== binding.event.modifiers.shiftKey) return false;
              return true;
            }
          }

          function capture(d3_event) {
            testBindings(d3_event, true);
          }

          function bubble(d3_event) {
            var tagName = select(d3_event.target).node().tagName;

            if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
              return;
            }

            testBindings(d3_event, false);
          }

          function keybinding(selection) {
            selection = selection || select(document);
            selection.on('keydown.capture.' + namespace, capture, true);
            selection.on('keydown.bubble.' + namespace, bubble, false);
            return keybinding;
          } // was: keybinding.off()


          keybinding.unbind = function (selection) {
            _keybindings = [];
            selection = selection || select(document);
            selection.on('keydown.capture.' + namespace, null);
            selection.on('keydown.bubble.' + namespace, null);
            return keybinding;
          };

          keybinding.clear = function () {
            _keybindings = {};
            return keybinding;
          }; // Remove one or more keycode bindings.


          keybinding.off = function (codes, capture) {
            var arr = utilArrayUniq([].concat(codes));

            for (var i = 0; i < arr.length; i++) {
              var id = arr[i] + (capture ? '-capture' : '-bubble');
              delete _keybindings[id];
            }

            return keybinding;
          }; // Add one or more keycode bindings.


          keybinding.on = function (codes, callback, capture) {
            if (typeof callback !== 'function') {
              return keybinding.off(codes, capture);
            }

            var arr = utilArrayUniq([].concat(codes));

            for (var i = 0; i < arr.length; i++) {
              var id = arr[i] + (capture ? '-capture' : '-bubble');
              var binding = {
                id: id,
                capture: capture,
                callback: callback,
                event: {
                  key: undefined,
                  // preferred
                  keyCode: 0,
                  // fallback
                  modifiers: {
                    shiftKey: false,
                    ctrlKey: false,
                    altKey: false,
                    metaKey: false
                  }
                }
              };

              if (_keybindings[id]) {
                console.warn('warning: duplicate keybinding for "' + id + '"'); // eslint-disable-line no-console
              }

              _keybindings[id] = binding;
              var matches = arr[i].toLowerCase().match(/(?:(?:[^+⇧⌃⌥⌘])+|[⇧⌃⌥⌘]|\+\+|^\+$)/g);

              for (var j = 0; j < matches.length; j++) {
                // Normalise matching errors
                if (matches[j] === '++') matches[j] = '+';

                if (matches[j] in utilKeybinding.modifierCodes) {
                  var prop = utilKeybinding.modifierProperties[utilKeybinding.modifierCodes[matches[j]]];
                  binding.event.modifiers[prop] = true;
                } else {
                  binding.event.key = utilKeybinding.keys[matches[j]] || matches[j];

                  if (matches[j] in utilKeybinding.keyCodes) {
                    binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
                  }
                }
              }
            }

            return keybinding;
          };

          return keybinding;
        }
        /*
         * See https://github.com/keithamus/jwerty
         */

        utilKeybinding.modifierCodes = {
          // Shift key, ⇧
          '⇧': 16,
          shift: 16,
          // CTRL key, on Mac: ⌃
          '⌃': 17,
          ctrl: 17,
          // ALT key, on Mac: ⌥ (Alt)
          '⌥': 18,
          alt: 18,
          option: 18,
          // META, on Mac: ⌘ (CMD), on Windows (Win), on Linux (Super)
          '⌘': 91,
          meta: 91,
          cmd: 91,
          'super': 91,
          win: 91
        };
        utilKeybinding.modifierProperties = {
          16: 'shiftKey',
          17: 'ctrlKey',
          18: 'altKey',
          91: 'metaKey'
        };
        utilKeybinding.plusKeys = ['plus', 'ffplus', '=', 'ffequals', '≠', '±'];
        utilKeybinding.minusKeys = ['_', '-', 'ffminus', 'dash', '–', '—'];
        utilKeybinding.keys = {
          // Backspace key, on Mac: ⌫ (Backspace)
          '⌫': 'Backspace',
          backspace: 'Backspace',
          // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
          '⇥': 'Tab',
          '⇆': 'Tab',
          tab: 'Tab',
          // Return key, ↩
          '↩': 'Enter',
          '↵': 'Enter',
          '⏎': 'Enter',
          'return': 'Enter',
          enter: 'Enter',
          '⌅': 'Enter',
          // Pause/Break key
          'pause': 'Pause',
          'pause-break': 'Pause',
          // Caps Lock key, ⇪
          '⇪': 'CapsLock',
          caps: 'CapsLock',
          'caps-lock': 'CapsLock',
          // Escape key, on Mac: ⎋, on Windows: Esc
          '⎋': ['Escape', 'Esc'],
          escape: ['Escape', 'Esc'],
          esc: ['Escape', 'Esc'],
          // Space key
          space: [' ', 'Spacebar'],
          // Page-Up key, or pgup, on Mac: ↖
          '↖': 'PageUp',
          pgup: 'PageUp',
          'page-up': 'PageUp',
          // Page-Down key, or pgdown, on Mac: ↘
          '↘': 'PageDown',
          pgdown: 'PageDown',
          'page-down': 'PageDown',
          // END key, on Mac: ⇟
          '⇟': 'End',
          end: 'End',
          // HOME key, on Mac: ⇞
          '⇞': 'Home',
          home: 'Home',
          // Insert key, or ins
          ins: 'Insert',
          insert: 'Insert',
          // Delete key, on Mac: ⌦ (Delete)
          '⌦': ['Delete', 'Del'],
          del: ['Delete', 'Del'],
          'delete': ['Delete', 'Del'],
          // Left Arrow Key, or ←
          '←': ['ArrowLeft', 'Left'],
          left: ['ArrowLeft', 'Left'],
          'arrow-left': ['ArrowLeft', 'Left'],
          // Up Arrow Key, or ↑
          '↑': ['ArrowUp', 'Up'],
          up: ['ArrowUp', 'Up'],
          'arrow-up': ['ArrowUp', 'Up'],
          // Right Arrow Key, or →
          '→': ['ArrowRight', 'Right'],
          right: ['ArrowRight', 'Right'],
          'arrow-right': ['ArrowRight', 'Right'],
          // Up Arrow Key, or ↓
          '↓': ['ArrowDown', 'Down'],
          down: ['ArrowDown', 'Down'],
          'arrow-down': ['ArrowDown', 'Down'],
          // odities, stuff for backward compatibility (browsers and code):
          // Num-Multiply, or *
          '*': ['*', 'Multiply'],
          star: ['*', 'Multiply'],
          asterisk: ['*', 'Multiply'],
          multiply: ['*', 'Multiply'],
          // Num-Plus or +
          '+': ['+', 'Add'],
          'plus': ['+', 'Add'],
          // Num-Subtract, or -
          '-': ['-', 'Subtract'],
          subtract: ['-', 'Subtract'],
          'dash': ['-', 'Subtract'],
          // Semicolon
          semicolon: ';',
          // = or equals
          equals: '=',
          // Comma, or ,
          comma: ',',
          // Period, or ., or full-stop
          period: '.',
          'full-stop': '.',
          // Slash, or /, or forward-slash
          slash: '/',
          'forward-slash': '/',
          // Tick, or `, or back-quote
          tick: '`',
          'back-quote': '`',
          // Open bracket, or [
          'open-bracket': '[',
          // Back slash, or \
          'back-slash': '\\',
          // Close backet, or ]
          'close-bracket': ']',
          // Apostrophe, or Quote, or '
          quote: '\'',
          apostrophe: '\'',
          // NUMPAD 0-9
          'num-0': '0',
          'num-1': '1',
          'num-2': '2',
          'num-3': '3',
          'num-4': '4',
          'num-5': '5',
          'num-6': '6',
          'num-7': '7',
          'num-8': '8',
          'num-9': '9',
          // F1-F25
          f1: 'F1',
          f2: 'F2',
          f3: 'F3',
          f4: 'F4',
          f5: 'F5',
          f6: 'F6',
          f7: 'F7',
          f8: 'F8',
          f9: 'F9',
          f10: 'F10',
          f11: 'F11',
          f12: 'F12',
          f13: 'F13',
          f14: 'F14',
          f15: 'F15',
          f16: 'F16',
          f17: 'F17',
          f18: 'F18',
          f19: 'F19',
          f20: 'F20',
          f21: 'F21',
          f22: 'F22',
          f23: 'F23',
          f24: 'F24',
          f25: 'F25'
        };
        utilKeybinding.keyCodes = {
          // Backspace key, on Mac: ⌫ (Backspace)
          '⌫': 8,
          backspace: 8,
          // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
          '⇥': 9,
          '⇆': 9,
          tab: 9,
          // Return key, ↩
          '↩': 13,
          '↵': 13,
          '⏎': 13,
          'return': 13,
          enter: 13,
          '⌅': 13,
          // Pause/Break key
          'pause': 19,
          'pause-break': 19,
          // Caps Lock key, ⇪
          '⇪': 20,
          caps: 20,
          'caps-lock': 20,
          // Escape key, on Mac: ⎋, on Windows: Esc
          '⎋': 27,
          escape: 27,
          esc: 27,
          // Space key
          space: 32,
          // Page-Up key, or pgup, on Mac: ↖
          '↖': 33,
          pgup: 33,
          'page-up': 33,
          // Page-Down key, or pgdown, on Mac: ↘
          '↘': 34,
          pgdown: 34,
          'page-down': 34,
          // END key, on Mac: ⇟
          '⇟': 35,
          end: 35,
          // HOME key, on Mac: ⇞
          '⇞': 36,
          home: 36,
          // Insert key, or ins
          ins: 45,
          insert: 45,
          // Delete key, on Mac: ⌦ (Delete)
          '⌦': 46,
          del: 46,
          'delete': 46,
          // Left Arrow Key, or ←
          '←': 37,
          left: 37,
          'arrow-left': 37,
          // Up Arrow Key, or ↑
          '↑': 38,
          up: 38,
          'arrow-up': 38,
          // Right Arrow Key, or →
          '→': 39,
          right: 39,
          'arrow-right': 39,
          // Up Arrow Key, or ↓
          '↓': 40,
          down: 40,
          'arrow-down': 40,
          // odities, printing characters that come out wrong:
          // Firefox Equals
          'ffequals': 61,
          // Num-Multiply, or *
          '*': 106,
          star: 106,
          asterisk: 106,
          multiply: 106,
          // Num-Plus or +
          '+': 107,
          'plus': 107,
          // Num-Subtract, or -
          '-': 109,
          subtract: 109,
          // Vertical Bar / Pipe
          '|': 124,
          // Firefox Plus
          'ffplus': 171,
          // Firefox Minus
          'ffminus': 173,
          // Semicolon
          ';': 186,
          semicolon: 186,
          // = or equals
          '=': 187,
          'equals': 187,
          // Comma, or ,
          ',': 188,
          comma: 188,
          // Dash / Underscore key
          'dash': 189,
          // Period, or ., or full-stop
          '.': 190,
          period: 190,
          'full-stop': 190,
          // Slash, or /, or forward-slash
          '/': 191,
          slash: 191,
          'forward-slash': 191,
          // Tick, or `, or back-quote
          '`': 192,
          tick: 192,
          'back-quote': 192,
          // Open bracket, or [
          '[': 219,
          'open-bracket': 219,
          // Back slash, or \
          '\\': 220,
          'back-slash': 220,
          // Close backet, or ]
          ']': 221,
          'close-bracket': 221,
          // Apostrophe, or Quote, or '
          '\'': 222,
          quote: 222,
          apostrophe: 222
        }; // NUMPAD 0-9

        var i = 95,
            n = 0;

        while (++i < 106) {
          utilKeybinding.keyCodes['num-' + n] = i;
          ++n;
        } // 0-9


        i = 47;
        n = 0;

        while (++i < 58) {
          utilKeybinding.keyCodes[n] = i;
          ++n;
        } // F1-F25


        i = 111;
        n = 1;

        while (++i < 136) {
          utilKeybinding.keyCodes['f' + n] = i;
          ++n;
        } // a-z


        i = 64;

        while (++i < 91) {
          utilKeybinding.keyCodes[String.fromCharCode(i).toLowerCase()] = i;
        }

        function utilObjectOmit(obj, omitKeys) {
          return Object.keys(obj).reduce(function (result, key) {
            if (omitKeys.indexOf(key) === -1) {
              result[key] = obj[key]; // keep
            }

            return result;
          }, {});
        }

        // Copies a variable number of methods from source to target.
        function utilRebind(target, source) {
          var i = 1,
              n = arguments.length,
              method;

          while (++i < n) {
            target[method = arguments[i]] = d3_rebind(target, source, source[method]);
          }

          return target;
        } // Method is assumed to be a standard D3 getter-setter:
        // If passed with no arguments, gets the value.
        // If passed with arguments, sets the value and returns the target.

        function d3_rebind(target, source, method) {
          return function () {
            var value = method.apply(source, arguments);
            return value === source ? target : value;
          };
        }

        // A per-domain session mutex backed by a cookie and dead man's
        // switch. If the session crashes, the mutex will auto-release
        // after 5 seconds.
        // This accepts a string and returns an object that complies with utilSessionMutexType
        function utilSessionMutex(name) {
          var mutex = {};
          var intervalID;

          function renew() {
            var expires = new Date();
            expires.setSeconds(expires.getSeconds() + 5);
            document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
          }

          mutex.lock = function () {
            if (intervalID) return true;
            var cookie = document.cookie.replace(new RegExp('(?:(?:^|.*;)\\s*' + name + '\\s*\\=\\s*([^;]*).*$)|^.*$'), '$1');
            if (cookie) return false;
            renew();
            intervalID = window.setInterval(renew, 4000);
            return true;
          };

          mutex.unlock = function () {
            if (!intervalID) return;
            document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
            clearInterval(intervalID);
            intervalID = null;
          };

          mutex.locked = function () {
            return !!intervalID;
          };

          return mutex;
        }

        function utilTiler() {
          var _size = [256, 256];
          var _scale = 256;
          var _tileSize = 256;
          var _zoomExtent = [0, 20];
          var _translate = [_size[0] / 2, _size[1] / 2];
          var _margin = 0;
          var _skipNullIsland = false;

          function clamp(num, min, max) {
            return Math.max(min, Math.min(num, max));
          }

          function nearNullIsland(tile) {
            var x = tile[0];
            var y = tile[1];
            var z = tile[2];

            if (z >= 7) {
              var center = Math.pow(2, z - 1);
              var width = Math.pow(2, z - 6);
              var min = center - width / 2;
              var max = center + width / 2 - 1;
              return x >= min && x <= max && y >= min && y <= max;
            }

            return false;
          }

          function tiler() {
            var z = geoScaleToZoom(_scale / (2 * Math.PI), _tileSize);
            var z0 = clamp(Math.round(z), _zoomExtent[0], _zoomExtent[1]);
            var tileMin = 0;
            var tileMax = Math.pow(2, z0) - 1;
            var log2ts = Math.log(_tileSize) * Math.LOG2E;
            var k = Math.pow(2, z - z0 + log2ts);
            var origin = [(_translate[0] - _scale / 2) / k, (_translate[1] - _scale / 2) / k];
            var cols = range$1(clamp(Math.floor(-origin[0]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[0] / k - origin[0]) + _margin, tileMin, tileMax + 1));
            var rows = range$1(clamp(Math.floor(-origin[1]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[1] / k - origin[1]) + _margin, tileMin, tileMax + 1));
            var tiles = [];

            for (var i = 0; i < rows.length; i++) {
              var y = rows[i];

              for (var j = 0; j < cols.length; j++) {
                var x = cols[j];

                if (i >= _margin && i <= rows.length - _margin && j >= _margin && j <= cols.length - _margin) {
                  tiles.unshift([x, y, z0]); // tiles in view at beginning
                } else {
                  tiles.push([x, y, z0]); // tiles in margin at the end
                }
              }
            }

            tiles.translate = origin;
            tiles.scale = k;
            return tiles;
          }
          /**
           * getTiles() returns an array of tiles that cover the map view
           */


          tiler.getTiles = function (projection) {
            var origin = [projection.scale() * Math.PI - projection.translate()[0], projection.scale() * Math.PI - projection.translate()[1]];
            this.size(projection.clipExtent()[1]).scale(projection.scale() * 2 * Math.PI).translate(projection.translate());
            var tiles = tiler();
            var ts = tiles.scale;
            return tiles.map(function (tile) {
              if (_skipNullIsland && nearNullIsland(tile)) {
                return false;
              }

              var x = tile[0] * ts - origin[0];
              var y = tile[1] * ts - origin[1];
              return {
                id: tile.toString(),
                xyz: tile,
                extent: geoExtent(projection.invert([x, y + ts]), projection.invert([x + ts, y]))
              };
            }).filter(Boolean);
          };
          /**
           * getGeoJSON() returns a FeatureCollection for debugging tiles
           */


          tiler.getGeoJSON = function (projection) {
            var features = tiler.getTiles(projection).map(function (tile) {
              return {
                type: 'Feature',
                properties: {
                  id: tile.id,
                  name: tile.id
                },
                geometry: {
                  type: 'Polygon',
                  coordinates: [tile.extent.polygon()]
                }
              };
            });
            return {
              type: 'FeatureCollection',
              features: features
            };
          };

          tiler.tileSize = function (val) {
            if (!arguments.length) return _tileSize;
            _tileSize = val;
            return tiler;
          };

          tiler.zoomExtent = function (val) {
            if (!arguments.length) return _zoomExtent;
            _zoomExtent = val;
            return tiler;
          };

          tiler.size = function (val) {
            if (!arguments.length) return _size;
            _size = val;
            return tiler;
          };

          tiler.scale = function (val) {
            if (!arguments.length) return _scale;
            _scale = val;
            return tiler;
          };

          tiler.translate = function (val) {
            if (!arguments.length) return _translate;
            _translate = val;
            return tiler;
          }; // number to extend the rows/columns beyond those covering the viewport


          tiler.margin = function (val) {
            if (!arguments.length) return _margin;
            _margin = +val;
            return tiler;
          };

          tiler.skipNullIsland = function (val) {
            if (!arguments.length) return _skipNullIsland;
            _skipNullIsland = val;
            return tiler;
          };

          return tiler;
        }

        function utilTriggerEvent(target, type) {
          target.each(function () {
            var evt = document.createEvent('HTMLEvents');
            evt.initEvent(type, true, true);
            this.dispatchEvent(evt);
          });
        }

        var _mainLocations = coreLocations(); // singleton
        // `coreLocations` maintains an internal index of all the boundaries/geofences used by iD.
        // It's used by presets, community index, background imagery, to know where in the world these things are valid.
        // These geofences should be defined by `locationSet` objects:
        //
        // let locationSet = {
        //   include: [ Array of locations ],
        //   exclude: [ Array of locations ]
        // };
        //
        // For more info see the location-conflation and country-coder projects, see:
        // https://github.com/ideditor/location-conflation
        // https://github.com/ideditor/country-coder
        //

        function coreLocations() {
          var _this = {};
          var _resolvedFeatures = {}; // cache of *resolved* locationSet features

          var _loco = new _default(); // instance of a location-conflation resolver


          var _wp; // instance of a which-polygon index
          // pre-resolve the worldwide locationSet


          var world = {
            locationSet: {
              include: ['Q2']
            }
          };
          resolveLocationSet(world);
          rebuildIndex();
          var _queue = [];

          var _deferred = new Set();

          var _inProcess; // Returns a Promise to process the queue


          function processQueue() {
            if (!_queue.length) return Promise.resolve(); // console.log(`queue length ${_queue.length}`);

            var chunk = _queue.pop();

            return new Promise(function (resolvePromise) {
              var handle = window.requestIdleCallback(function () {
                _deferred["delete"](handle); // const t0 = performance.now();


                chunk.forEach(resolveLocationSet); // const t1 = performance.now();
                // console.log('chunk processed in ' + (t1 - t0) + ' ms');

                resolvePromise();
              });

              _deferred.add(handle);
            }).then(function () {
              return processQueue();
            });
          } // Pass an Object with a `locationSet` property,
          // Performs the locationSet resolution, caches the result, and sets a `locationSetID` property on the object.


          function resolveLocationSet(obj) {
            if (obj.locationSetID) return; // work was done already

            try {
              var locationSet = obj.locationSet;

              if (!locationSet) {
                throw new Error('object missing locationSet property');
              }

              if (!locationSet.include) {
                // missing `include`, default to worldwide include
                locationSet.include = ['Q2']; // https://github.com/openstreetmap/iD/pull/8305#discussion_r662344647
              }

              var resolved = _loco.resolveLocationSet(locationSet);

              var locationSetID = resolved.id;
              obj.locationSetID = locationSetID;

              if (!resolved.feature.geometry.coordinates.length || !resolved.feature.properties.area) {
                throw new Error("locationSet ".concat(locationSetID, " resolves to an empty feature."));
              }

              if (!_resolvedFeatures[locationSetID]) {
                // First time seeing this locationSet feature
                var feature = JSON.parse(JSON.stringify(resolved.feature)); // deep clone

                feature.id = locationSetID; // Important: always use the locationSet `id` (`+[Q30]`), not the feature `id` (`Q30`)

                feature.properties.id = locationSetID;
                _resolvedFeatures[locationSetID] = feature; // insert into cache
              }
            } catch (err) {
              obj.locationSet = {
                include: ['Q2']
              }; // default worldwide

              obj.locationSetID = '+[Q2]';
            }
          } // Rebuilds the whichPolygon index with whatever features have been resolved.


          function rebuildIndex() {
            _wp = whichPolygon_1({
              features: Object.values(_resolvedFeatures)
            });
          } //
          // `mergeCustomGeoJSON`
          //  Accepts an FeatureCollection-like object containing custom locations
          //  Each feature must have a filename-like `id`, for example: `something.geojson`
          //
          //  {
          //    "type": "FeatureCollection"
          //    "features": [
          //      {
          //        "type": "Feature",
          //        "id": "philly_metro.geojson",
          //        "properties": { … },
          //        "geometry": { … }
          //      }
          //    ]
          //  }
          //


          _this.mergeCustomGeoJSON = function (fc) {
            if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
              fc.features.forEach(function (feature) {
                feature.properties = feature.properties || {};
                var props = feature.properties; // Get `id` from either `id` or `properties`

                var id = feature.id || props.id;
                if (!id || !/^\S+\.geojson$/i.test(id)) return; // Ensure `id` exists and is lowercase

                id = id.toLowerCase();
                feature.id = id;
                props.id = id; // Ensure `area` property exists

                if (!props.area) {
                  var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²

                  props.area = Number(area.toFixed(2));
                }

                _loco._cache[id] = feature;
              });
            }
          }; //
          // `mergeLocationSets`
          //  Accepts an Array of Objects containing `locationSet` properties.
          //  The locationSets will be resolved and indexed in the background.
          //  [
          //   { id: 'preset1', locationSet: {…} },
          //   { id: 'preset2', locationSet: {…} },
          //   { id: 'preset3', locationSet: {…} },
          //   …
          //  ]
          //  After resolving and indexing, the Objects will be decorated with a
          //  `locationSetID` property.
          //  [
          //   { id: 'preset1', locationSet: {…}, locationSetID: '+[Q2]' },
          //   { id: 'preset2', locationSet: {…}, locationSetID: '+[Q30]' },
          //   { id: 'preset3', locationSet: {…}, locationSetID: '+[Q2]' },
          //   …
          //  ]
          //
          //  Returns a Promise fulfilled when the resolving/indexing has been completed
          //  This will take some seconds but happen in the background during browser idle time.
          //


          _this.mergeLocationSets = function (objects) {
            if (!Array.isArray(objects)) return Promise.reject('nothing to do'); // Resolve all locationSets -> geojson, processing data in chunks
            //
            // Because this will happen during idle callbacks, we want to choose a chunk size
            // that won't make the browser stutter too badly.  LocationSets that are a simple
            // country coder include will resolve instantly, but ones that involve complex
            // include/exclude operations will take some milliseconds longer.
            //
            // Some discussion and performance results on these tickets:
            // https://github.com/ideditor/location-conflation/issues/26
            // https://github.com/osmlab/name-suggestion-index/issues/4784#issuecomment-742003434

            _queue = _queue.concat(utilArrayChunk(objects, 200));

            if (!_inProcess) {
              _inProcess = processQueue().then(function () {
                rebuildIndex();
                _inProcess = null;
                return objects;
              });
            }

            return _inProcess;
          }; //
          // `locationSetID`
          // Returns a locationSetID for a given locationSet (fallback to `+[Q2]`, world)
          // (The locationset doesn't necessarily need to be resolved to compute its `id`)
          //
          // Arguments
          //   `locationSet`: A locationSet, e.g. `{ include: ['us'] }`
          // Returns
          //   The locationSetID, e.g. `+[Q30]`
          //


          _this.locationSetID = function (locationSet) {
            var locationSetID;

            try {
              locationSetID = _loco.validateLocationSet(locationSet).id;
            } catch (err) {
              locationSetID = '+[Q2]'; // the world
            }

            return locationSetID;
          }; //
          // `feature`
          // Returns the resolved GeoJSON feature for a given locationSetID (fallback to 'world')
          //
          // Arguments
          //   `locationSetID`: id of the form like `+[Q30]`  (United States)
          // Returns
          //   A GeoJSON feature:
          //   {
          //     type: 'Feature',
          //     id: '+[Q30]',
          //     properties: { id: '+[Q30]', area: 21817019.17, … },
          //     geometry: { … }
          //   }


          _this.feature = function (locationSetID) {
            return _resolvedFeatures[locationSetID] || _resolvedFeatures['+[Q2]'];
          }; //
          // `locationsAt`
          // Find all the resolved locationSets valid at the given location.
          // Results include the area (in km²) to facilitate sorting.
          //
          // Arguments
          //   `loc`: the [lon,lat] location to query, e.g. `[-74.4813, 40.7967]`
          // Returns
          //   Object of locationSetIDs to areas (in km²)
          //   {
          //     "+[Q2]": 511207893.3958111,
          //     "+[Q30]": 21817019.17,
          //     "+[new_jersey.geojson]": 22390.77,
          //     …
          //   }
          //


          _this.locationsAt = function (loc) {
            var result = {};
            (_wp(loc, true) || []).forEach(function (prop) {
              return result[prop.id] = prop.area;
            });
            return result;
          }; //
          // `query`
          // Execute a query directly against which-polygon
          // https://github.com/mapbox/which-polygon
          //
          // Arguments
          //   `loc`: the [lon,lat] location to query,
          //   `multi`: `true` to return all results, `false` to return first result
          // Returns
          //   Array of GeoJSON *properties* for the locationSet features that exist at `loc`
          //


          _this.query = function (loc, multi) {
            return _wp(loc, multi);
          }; // Direct access to the location-conflation resolver


          _this.loco = function () {
            return _loco;
          }; // Direct access to the which-polygon index


          _this.wp = function () {
            return _wp;
          };

          return _this;
        }

        var $findIndex = arrayIteration.findIndex;


        var FIND_INDEX = 'findIndex';
        var SKIPS_HOLES = true;

        // Shouldn't skip holes
        if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES = false; });

        // `Array.prototype.findIndex` method
        // https://tc39.es/ecma262/#sec-array.prototype.findindex
        _export({ target: 'Array', proto: true, forced: SKIPS_HOLES }, {
          findIndex: function findIndex(callbackfn /* , that = undefined */) {
            return $findIndex(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          }
        });

        // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
        addToUnscopables(FIND_INDEX);

        var notARegexp = function (it) {
          if (isRegexp(it)) {
            throw TypeError("The method doesn't accept regular expressions");
          } return it;
        };

        var MATCH = wellKnownSymbol('match');

        var correctIsRegexpLogic = function (METHOD_NAME) {
          var regexp = /./;
          try {
            '/./'[METHOD_NAME](regexp);
          } catch (error1) {
            try {
              regexp[MATCH] = false;
              return '/./'[METHOD_NAME](regexp);
            } catch (error2) { /* empty */ }
          } return false;
        };

        // `String.prototype.includes` method
        // https://tc39.es/ecma262/#sec-string.prototype.includes
        _export({ target: 'String', proto: true, forced: !correctIsRegexpLogic('includes') }, {
          includes: function includes(searchString /* , position = 0 */) {
            return !!~String(requireObjectCoercible(this))
              .indexOf(notARegexp(searchString), arguments.length > 1 ? arguments[1] : undefined);
          }
        });

        var _mainLocalizer = coreLocalizer(); // singleton


        var _t = _mainLocalizer.t;
        // coreLocalizer manages language and locale parameters including translated strings
        //

        function coreLocalizer() {
          var localizer = {};
          var _dataLanguages = {}; // `_dataLocales` is an object containing all _supported_ locale codes -> language info.
          // * `rtl` - right-to-left or left-to-right text direction
          // * `pct` - the percent of strings translated; 1 = 100%, full coverage
          //
          // {
          // en: { rtl: false, pct: {…} },
          // de: { rtl: false, pct: {…} },
          // …
          // }

          var _dataLocales = {}; // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
          // {
          // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
          // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
          // …
          // }

          var _localeStrings = {}; // the current locale

          var _localeCode = 'en-US'; // `_localeCodes` must contain `_localeCode` first, optionally followed by fallbacks

          var _localeCodes = ['en-US', 'en'];
          var _languageCode = 'en';
          var _textDirection = 'ltr';
          var _usesMetric = false;
          var _languageNames = {};
          var _scriptNames = {}; // getters for the current locale parameters

          localizer.localeCode = function () {
            return _localeCode;
          };

          localizer.localeCodes = function () {
            return _localeCodes;
          };

          localizer.languageCode = function () {
            return _languageCode;
          };

          localizer.textDirection = function () {
            return _textDirection;
          };

          localizer.usesMetric = function () {
            return _usesMetric;
          };

          localizer.languageNames = function () {
            return _languageNames;
          };

          localizer.scriptNames = function () {
            return _scriptNames;
          }; // The client app may want to manually set the locale, regardless of the
          // settings provided by the browser


          var _preferredLocaleCodes = [];

          localizer.preferredLocaleCodes = function (codes) {
            if (!arguments.length) return _preferredLocaleCodes;

            if (typeof codes === 'string') {
              // be generous and accept delimited strings as input
              _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
            } else {
              _preferredLocaleCodes = codes;
            }

            return localizer;
          };

          var _loadPromise;

          localizer.ensureLoaded = function () {
            if (_loadPromise) return _loadPromise;
            var filesToFetch = [// load the list of languages
            'languages', // load the list of supported locales
            'locales'];
            var localeDirs = {
              general: 'locales',
              tagging: 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/translations'
            };
            var fileMap = _mainFileFetcher.fileMap();

            for (var scopeId in localeDirs) {
              var key = "locales_index_".concat(scopeId);
              fileMap[key] = localeDirs[scopeId] + '/index.min.json';
              filesToFetch.push(key);
            }

            return _loadPromise = Promise.all(filesToFetch.map(function (key) {
              return _mainFileFetcher.get(key);
            })).then(function (results) {
              _dataLanguages = results[0];
              _dataLocales = results[1];
              var indexes = results.slice(2);

              var requestedLocales = (_preferredLocaleCodes || []). // List of locales preferred by the browser in priority order.
              concat(utilDetect().browserLocales) // fallback to English since it's the only guaranteed complete language
              .concat(['en']);

              _localeCodes = localesToUseFrom(requestedLocales); // Run iD in the highest-priority locale; the rest are fallbacks

              _localeCode = _localeCodes[0];
              var loadStringsPromises = [];
              indexes.forEach(function (index, i) {
                // Will always return the index for `en` if nothing else
                var fullCoverageIndex = _localeCodes.findIndex(function (locale) {
                  return index[locale] && index[locale].pct === 1;
                }); // We only need to load locales up until we find one with full coverage


                _localeCodes.slice(0, fullCoverageIndex + 1).forEach(function (code) {
                  var scopeId = Object.keys(localeDirs)[i];
                  var directory = Object.values(localeDirs)[i];
                  if (index[code]) loadStringsPromises.push(localizer.loadLocale(code, scopeId, directory));
                });
              });
              return Promise.all(loadStringsPromises);
            }).then(function () {
              updateForCurrentLocale();
            })["catch"](function (err) {
              return console.error(err);
            }); // eslint-disable-line
          }; // Returns the locales from `requestedLocales` supported by iD that we should use


          function localesToUseFrom(requestedLocales) {
            var supportedLocales = _dataLocales;
            var toUse = [];

            for (var i in requestedLocales) {
              var locale = requestedLocales[i];
              if (supportedLocales[locale]) toUse.push(locale);

              if (locale.includes('-')) {
                // Full locale ('es-ES'), add fallback to the base ('es')
                var langPart = locale.split('-')[0];
                if (supportedLocales[langPart]) toUse.push(langPart);
              }
            } // remove duplicates


            return utilArrayUniq(toUse);
          }

          function updateForCurrentLocale() {
            if (!_localeCode) return;
            _languageCode = _localeCode.split('-')[0];
            var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
            var hash = utilStringQs(window.location.hash);

            if (hash.rtl === 'true') {
              _textDirection = 'rtl';
            } else if (hash.rtl === 'false') {
              _textDirection = 'ltr';
            } else {
              _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
            }

            var locale = _localeCode;
            if (locale.toLowerCase() === 'en-us') locale = 'en';
            _languageNames = _localeStrings.general[locale].languageNames;
            _scriptNames = _localeStrings.general[locale].scriptNames;
            _usesMetric = _localeCode.slice(-3).toLowerCase() !== '-us';
          }
          /* Locales */
          // Returns a Promise to load the strings for the requested locale


          localizer.loadLocale = function (locale, scopeId, directory) {
            // US English is the default
            if (locale.toLowerCase() === 'en-us') locale = 'en';

            if (_localeStrings[scopeId] && _localeStrings[scopeId][locale]) {
              // already loaded
              return Promise.resolve(locale);
            }

            var fileMap = _mainFileFetcher.fileMap();
            var key = "locale_".concat(scopeId, "_").concat(locale);
            fileMap[key] = "".concat(directory, "/").concat(locale, ".min.json");
            return _mainFileFetcher.get(key).then(function (d) {
              if (!_localeStrings[scopeId]) _localeStrings[scopeId] = {};
              _localeStrings[scopeId][locale] = d[locale];
              return locale;
            });
          };

          localizer.pluralRule = function (number) {
            return pluralRule(number, _localeCode);
          }; // Returns the plural rule for the given `number` with the given `localeCode`.
          // One of: `zero`, `one`, `two`, `few`, `many`, `other`


          function pluralRule(number, localeCode) {
            // modern browsers have this functionality built-in
            var rules = 'Intl' in window && Intl.PluralRules && new Intl.PluralRules(localeCode);

            if (rules) {
              return rules.select(number);
            } // fallback to basic one/other, as in English


            if (number === 1) return 'one';
            return 'other';
          }
          /**
          * Try to find that string in `locale` or the current `_localeCode` matching
          * the given `stringId`. If no string can be found in the requested locale,
          * we'll recurse down all the `_localeCodes` until one is found.
          *
          * @param  {string}   stringId      string identifier
          * @param  {object?}  replacements  token replacements and default string
          * @param  {string?}  locale        locale to use (defaults to currentLocale)
          * @return {string?}  localized string
          */


          localizer.tInfo = function (origStringId, replacements, locale) {
            var stringId = origStringId.trim();
            var scopeId = 'general';

            if (stringId[0] === '_') {
              var split = stringId.split('.');
              scopeId = split[0].slice(1);
              stringId = split.slice(1).join('.');
            }

            locale = locale || _localeCode;
            var path = stringId.split('.').map(function (s) {
              return s.replace(/<TX_DOT>/g, '.');
            }).reverse();
            var stringsKey = locale; // US English is the default

            if (stringsKey.toLowerCase() === 'en-us') stringsKey = 'en';
            var result = _localeStrings && _localeStrings[scopeId] && _localeStrings[scopeId][stringsKey];

            while (result !== undefined && path.length) {
              result = result[path.pop()];
            }

            if (result !== undefined) {
              if (replacements) {
                if (_typeof(result) === 'object' && Object.keys(result).length) {
                  // If plural forms are provided, dig one level deeper based on the
                  // first numeric token replacement provided.
                  var number = Object.values(replacements).find(function (value) {
                    return typeof value === 'number';
                  });

                  if (number !== undefined) {
                    var rule = pluralRule(number, locale);

                    if (result[rule]) {
                      result = result[rule];
                    } else {
                      // We're pretty sure this should be a plural but no string
                      // could be found for the given rule. Just pick the first
                      // string and hope it makes sense.
                      result = Object.values(result)[0];
                    }
                  }
                }

                if (typeof result === 'string') {
                  for (var key in replacements) {
                    var value = replacements[key];

                    if (typeof value === 'number') {
                      if (value.toLocaleString) {
                        // format numbers for the locale
                        value = value.toLocaleString(locale, {
                          style: 'decimal',
                          useGrouping: true,
                          minimumFractionDigits: 0
                        });
                      } else {
                        value = value.toString();
                      }
                    }

                    var token = "{".concat(key, "}");
                    var regex = new RegExp(token, 'g');
                    result = result.replace(regex, value);
                  }
                }
              }

              if (typeof result === 'string') {
                // found a localized string!
                return {
                  text: result,
                  locale: locale
                };
              }
            } // no localized string found...
            // attempt to fallback to a lower-priority language


            var index = _localeCodes.indexOf(locale);

            if (index >= 0 && index < _localeCodes.length - 1) {
              // eventually this will be 'en' or another locale with 100% coverage
              var fallback = _localeCodes[index + 1];
              return localizer.tInfo(origStringId, replacements, fallback);
            }

            if (replacements && 'default' in replacements) {
              // Fallback to a default value if one is specified in `replacements`
              return {
                text: replacements["default"],
                locale: null
              };
            }

            var missing = "Missing ".concat(locale, " translation: ").concat(origStringId);
            if (typeof console !== 'undefined') console.error(missing); // eslint-disable-line

            return {
              text: missing,
              locale: 'en'
            };
          };

          localizer.hasTextForStringId = function (stringId) {
            return !!localizer.tInfo(stringId, {
              "default": 'nothing found'
            }).locale;
          }; // Returns only the localized text, discarding the locale info


          localizer.t = function (stringId, replacements, locale) {
            return localizer.tInfo(stringId, replacements, locale).text;
          }; // Returns the localized text wrapped in an HTML element encoding the locale info


          localizer.t.html = function (stringId, replacements, locale) {
            var info = localizer.tInfo(stringId, replacements, locale); // text may be empty or undefined if `replacements.default` is

            return info.text ? localizer.htmlForLocalizedText(info.text, info.locale) : '';
          };

          localizer.htmlForLocalizedText = function (text, localeCode) {
            return "<span class=\"localized-text\" lang=\"".concat(localeCode || 'unknown', "\">").concat(text, "</span>");
          };

          localizer.languageName = function (code, options) {
            if (_languageNames[code]) {
              // name in locale language
              // e.g. "German"
              return _languageNames[code];
            } // sometimes we only want the local name


            if (options && options.localOnly) return null;
            var langInfo = _dataLanguages[code];

            if (langInfo) {
              if (langInfo.nativeName) {
                // name in native language
                // e.g. "Deutsch (de)"
                return localizer.t('translate.language_and_code', {
                  language: langInfo.nativeName,
                  code: code
                });
              } else if (langInfo.base && langInfo.script) {
                var base = langInfo.base; // the code of the language this is based on

                if (_languageNames[base]) {
                  // base language name in locale language
                  var scriptCode = langInfo.script;
                  var script = _scriptNames[scriptCode] || scriptCode; // e.g. "Serbian (Cyrillic)"

                  return localizer.t('translate.language_and_code', {
                    language: _languageNames[base],
                    code: script
                  });
                } else if (_dataLanguages[base] && _dataLanguages[base].nativeName) {
                  // e.g. "српски (sr-Cyrl)"
                  return localizer.t('translate.language_and_code', {
                    language: _dataLanguages[base].nativeName,
                    code: code
                  });
                }
              }
            }

            return code; // if not found, use the code
          };

          return localizer;
        }

        // `presetCollection` is a wrapper around an `Array` of presets `collection`,
        // and decorated with some extra methods for searching and matching geometry
        //

        function presetCollection(collection) {
          var MAXRESULTS = 50;
          var _this = {};
          var _memo = {};
          _this.collection = collection;

          _this.item = function (id) {
            if (_memo[id]) return _memo[id];

            var found = _this.collection.find(function (d) {
              return d.id === id;
            });

            if (found) _memo[id] = found;
            return found;
          };

          _this.index = function (id) {
            return _this.collection.findIndex(function (d) {
              return d.id === id;
            });
          };

          _this.matchGeometry = function (geometry) {
            return presetCollection(_this.collection.filter(function (d) {
              return d.matchGeometry(geometry);
            }));
          };

          _this.matchAllGeometry = function (geometries) {
            return presetCollection(_this.collection.filter(function (d) {
              return d && d.matchAllGeometry(geometries);
            }));
          };

          _this.matchAnyGeometry = function (geometries) {
            return presetCollection(_this.collection.filter(function (d) {
              return geometries.some(function (geom) {
                return d.matchGeometry(geom);
              });
            }));
          };

          _this.fallback = function (geometry) {
            var id = geometry;
            if (id === 'vertex') id = 'point';
            return _this.item(id);
          };

          _this.search = function (value, geometry, loc) {
            if (!value) return _this; // don't remove diacritical characters since we're assuming the user is being intentional

            value = value.toLowerCase().trim(); // match at name beginning or just after a space (e.g. "office" -> match "Law Office")

            function leading(a) {
              var index = a.indexOf(value);
              return index === 0 || a[index - 1] === ' ';
            } // match at name beginning only


            function leadingStrict(a) {
              var index = a.indexOf(value);
              return index === 0;
            }

            function sortPresets(nameProp) {
              return function sortNames(a, b) {
                var aCompare = a[nameProp]();
                var bCompare = b[nameProp](); // priority if search string matches preset name exactly - #4325

                if (value === aCompare) return -1;
                if (value === bCompare) return 1; // priority for higher matchScore

                var i = b.originalScore - a.originalScore;
                if (i !== 0) return i; // priority if search string appears earlier in preset name

                i = aCompare.indexOf(value) - bCompare.indexOf(value);
                if (i !== 0) return i; // priority for shorter preset names

                return aCompare.length - bCompare.length;
              };
            }

            var pool = _this.collection;

            if (Array.isArray(loc)) {
              var validLocations = _mainLocations.locationsAt(loc);
              pool = pool.filter(function (a) {
                return !a.locationSetID || validLocations[a.locationSetID];
              });
            }

            var searchable = pool.filter(function (a) {
              return a.searchable !== false && a.suggestion !== true;
            });
            var suggestions = pool.filter(function (a) {
              return a.suggestion === true;
            }); // matches value to preset.name

            var leadingNames = searchable.filter(function (a) {
              return leading(a.searchName());
            }).sort(sortPresets('searchName')); // matches value to preset suggestion name

            var leadingSuggestions = suggestions.filter(function (a) {
              return leadingStrict(a.searchName());
            }).sort(sortPresets('searchName'));
            var leadingNamesStripped = searchable.filter(function (a) {
              return leading(a.searchNameStripped());
            }).sort(sortPresets('searchNameStripped'));
            var leadingSuggestionsStripped = suggestions.filter(function (a) {
              return leadingStrict(a.searchNameStripped());
            }).sort(sortPresets('searchNameStripped')); // matches value to preset.terms values

            var leadingTerms = searchable.filter(function (a) {
              return (a.terms() || []).some(leading);
            });
            var leadingSuggestionTerms = suggestions.filter(function (a) {
              return (a.terms() || []).some(leading);
            }); // matches value to preset.tags values

            var leadingTagValues = searchable.filter(function (a) {
              return Object.values(a.tags || {}).filter(function (val) {
                return val !== '*';
              }).some(leading);
            }); // finds close matches to value in preset.name

            var similarName = searchable.map(function (a) {
              return {
                preset: a,
                dist: utilEditDistance(value, a.searchName())
              };
            }).filter(function (a) {
              return a.dist + Math.min(value.length - a.preset.searchName().length, 0) < 3;
            }).sort(function (a, b) {
              return a.dist - b.dist;
            }).map(function (a) {
              return a.preset;
            }); // finds close matches to value to preset suggestion name

            var similarSuggestions = suggestions.map(function (a) {
              return {
                preset: a,
                dist: utilEditDistance(value, a.searchName())
              };
            }).filter(function (a) {
              return a.dist + Math.min(value.length - a.preset.searchName().length, 0) < 1;
            }).sort(function (a, b) {
              return a.dist - b.dist;
            }).map(function (a) {
              return a.preset;
            }); // finds close matches to value in preset.terms

            var similarTerms = searchable.filter(function (a) {
              return (a.terms() || []).some(function (b) {
                return utilEditDistance(value, b) + Math.min(value.length - b.length, 0) < 3;
              });
            });
            var results = leadingNames.concat(leadingSuggestions, leadingNamesStripped, leadingSuggestionsStripped, leadingTerms, leadingSuggestionTerms, leadingTagValues, similarName, similarSuggestions, similarTerms).slice(0, MAXRESULTS - 1);

            if (geometry) {
              if (typeof geometry === 'string') {
                results.push(_this.fallback(geometry));
              } else {
                geometry.forEach(function (geom) {
                  return results.push(_this.fallback(geom));
                });
              }
            }

            return presetCollection(utilArrayUniq(results));
          };

          return _this;
        }

        // `presetCategory` builds a `presetCollection` of member presets,
        // decorated with some extra methods for searching and matching geometry
        //

        function presetCategory(categoryID, category, allPresets) {
          var _this = Object.assign({}, category); // shallow copy


          var _searchName; // cache


          var _searchNameStripped; // cache


          _this.id = categoryID;
          _this.members = presetCollection((category.members || []).map(function (presetID) {
            return allPresets[presetID];
          }).filter(Boolean));
          _this.geometry = _this.members.collection.reduce(function (acc, preset) {
            for (var i in preset.geometry) {
              var geometry = preset.geometry[i];

              if (acc.indexOf(geometry) === -1) {
                acc.push(geometry);
              }
            }

            return acc;
          }, []);

          _this.matchGeometry = function (geom) {
            return _this.geometry.indexOf(geom) >= 0;
          };

          _this.matchAllGeometry = function (geometries) {
            return _this.members.collection.some(function (preset) {
              return preset.matchAllGeometry(geometries);
            });
          };

          _this.matchScore = function () {
            return -1;
          };

          _this.name = function () {
            return _t("_tagging.presets.categories.".concat(categoryID, ".name"), {
              'default': categoryID
            });
          };

          _this.nameLabel = function () {
            return _t.html("_tagging.presets.categories.".concat(categoryID, ".name"), {
              'default': categoryID
            });
          };

          _this.terms = function () {
            return [];
          };

          _this.searchName = function () {
            if (!_searchName) {
              _searchName = (_this.suggestion ? _this.originalName : _this.name()).toLowerCase();
            }

            return _searchName;
          };

          _this.searchNameStripped = function () {
            if (!_searchNameStripped) {
              _searchNameStripped = _this.searchName(); // split combined diacritical characters into their parts

              if (_searchNameStripped.normalize) _searchNameStripped = _searchNameStripped.normalize('NFD'); // remove diacritics

              _searchNameStripped = _searchNameStripped.replace(/[\u0300-\u036f]/g, '');
            }

            return _searchNameStripped;
          };

          return _this;
        }

        // `presetField` decorates a given `field` Object
        // with some extra methods for searching and matching geometry
        //

        function presetField(fieldID, field) {
          var _this = Object.assign({}, field); // shallow copy


          _this.id = fieldID; // for use in classes, element ids, css selectors

          _this.safeid = utilSafeClassName(fieldID);

          _this.matchGeometry = function (geom) {
            return !_this.geometry || _this.geometry.indexOf(geom) !== -1;
          };

          _this.matchAllGeometry = function (geometries) {
            return !_this.geometry || geometries.every(function (geom) {
              return _this.geometry.indexOf(geom) !== -1;
            });
          };

          _this.t = function (scope, options) {
            return _t("_tagging.presets.fields.".concat(fieldID, ".").concat(scope), options);
          };

          _this.t.html = function (scope, options) {
            return _t.html("_tagging.presets.fields.".concat(fieldID, ".").concat(scope), options);
          };

          _this.hasTextForStringId = function (scope) {
            return _mainLocalizer.hasTextForStringId("_tagging.presets.fields.".concat(fieldID, ".").concat(scope));
          };

          _this.title = function () {
            return _this.overrideLabel || _this.t('label', {
              'default': fieldID
            });
          };

          _this.label = function () {
            return _this.overrideLabel || _this.t.html('label', {
              'default': fieldID
            });
          };

          var _placeholder = _this.placeholder;

          _this.placeholder = function () {
            return _this.t('placeholder', {
              'default': _placeholder
            });
          };

          _this.originalTerms = (_this.terms || []).join();

          _this.terms = function () {
            return _this.t('terms', {
              'default': _this.originalTerms
            }).toLowerCase().trim().split(/\s*,+\s*/);
          };

          _this.increment = _this.type === 'number' ? _this.increment || 1 : undefined;
          return _this;
        }

        // `Array.prototype.lastIndexOf` method
        // https://tc39.es/ecma262/#sec-array.prototype.lastindexof
        // eslint-disable-next-line es/no-array-prototype-lastindexof -- required for testing
        _export({ target: 'Array', proto: true, forced: arrayLastIndexOf !== [].lastIndexOf }, {
          lastIndexOf: arrayLastIndexOf
        });

        // `presetPreset` decorates a given `preset` Object
        // with some extra methods for searching and matching geometry
        //

        function presetPreset(presetID, preset, addable, allFields, allPresets) {
          allFields = allFields || {};
          allPresets = allPresets || {};

          var _this = Object.assign({}, preset); // shallow copy


          var _addable = addable || false;

          var _resolvedFields; // cache


          var _resolvedMoreFields; // cache


          var _searchName; // cache


          var _searchNameStripped; // cache


          _this.id = presetID;
          _this.safeid = utilSafeClassName(presetID); // for use in css classes, selectors, element ids

          _this.originalTerms = (_this.terms || []).join();
          _this.originalName = _this.name || '';
          _this.originalScore = _this.matchScore || 1;
          _this.originalReference = _this.reference || {};
          _this.originalFields = _this.fields || [];
          _this.originalMoreFields = _this.moreFields || [];

          _this.fields = function () {
            return _resolvedFields || (_resolvedFields = resolve('fields'));
          };

          _this.moreFields = function () {
            return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields'));
          };

          _this.resetFields = function () {
            return _resolvedFields = _resolvedMoreFields = null;
          };

          _this.tags = _this.tags || {};
          _this.addTags = _this.addTags || _this.tags;
          _this.removeTags = _this.removeTags || _this.addTags;
          _this.geometry = _this.geometry || [];

          _this.matchGeometry = function (geom) {
            return _this.geometry.indexOf(geom) >= 0;
          };

          _this.matchAllGeometry = function (geoms) {
            return geoms.every(_this.matchGeometry);
          };

          _this.matchScore = function (entityTags) {
            var tags = _this.tags;
            var seen = {};
            var score = 0; // match on tags

            for (var k in tags) {
              seen[k] = true;

              if (entityTags[k] === tags[k]) {
                score += _this.originalScore;
              } else if (tags[k] === '*' && k in entityTags) {
                score += _this.originalScore / 2;
              } else {
                return -1;
              }
            } // boost score for additional matches in addTags - #6802


            var addTags = _this.addTags;

            for (var _k in addTags) {
              if (!seen[_k] && entityTags[_k] === addTags[_k]) {
                score += _this.originalScore;
              }
            }

            return score;
          };

          _this.t = function (scope, options) {
            var textID = "_tagging.presets.presets.".concat(presetID, ".").concat(scope);
            return _t(textID, options);
          };

          _this.t.html = function (scope, options) {
            var textID = "_tagging.presets.presets.".concat(presetID, ".").concat(scope);
            return _t.html(textID, options);
          };

          _this.name = function () {
            return _this.t('name', {
              'default': _this.originalName
            });
          };

          _this.nameLabel = function () {
            return _this.t.html('name', {
              'default': _this.originalName
            });
          };

          _this.subtitle = function () {
            if (_this.suggestion) {
              var path = presetID.split('/');
              path.pop(); // remove brand name

              return _t('_tagging.presets.presets.' + path.join('/') + '.name');
            }

            return null;
          };

          _this.subtitleLabel = function () {
            if (_this.suggestion) {
              var path = presetID.split('/');
              path.pop(); // remove brand name

              return _t.html('_tagging.presets.presets.' + path.join('/') + '.name');
            }

            return null;
          };

          _this.terms = function () {
            return _this.t('terms', {
              'default': _this.originalTerms
            }).toLowerCase().trim().split(/\s*,+\s*/);
          };

          _this.searchName = function () {
            if (!_searchName) {
              _searchName = (_this.suggestion ? _this.originalName : _this.name()).toLowerCase();
            }

            return _searchName;
          };

          _this.searchNameStripped = function () {
            if (!_searchNameStripped) {
              _searchNameStripped = _this.searchName(); // split combined diacritical characters into their parts

              if (_searchNameStripped.normalize) _searchNameStripped = _searchNameStripped.normalize('NFD'); // remove diacritics

              _searchNameStripped = _searchNameStripped.replace(/[\u0300-\u036f]/g, '');
            }

            return _searchNameStripped;
          };

          _this.isFallback = function () {
            var tagCount = Object.keys(_this.tags).length;
            return tagCount === 0 || tagCount === 1 && _this.tags.hasOwnProperty('area');
          };

          _this.addable = function (val) {
            if (!arguments.length) return _addable;
            _addable = val;
            return _this;
          };

          _this.reference = function () {
            // Lookup documentation on Wikidata...
            var qid = _this.tags.wikidata || _this.tags['flag:wikidata'] || _this.tags['brand:wikidata'] || _this.tags['network:wikidata'] || _this.tags['operator:wikidata'];

            if (qid) {
              return {
                qid: qid
              };
            } // Lookup documentation on OSM Wikibase...


            var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
            var value = _this.originalReference.value || _this.tags[key];

            if (value === '*') {
              return {
                key: key
              };
            } else {
              return {
                key: key,
                value: value
              };
            }
          };

          _this.unsetTags = function (tags, geometry, ignoringKeys, skipFieldDefaults) {
            // allow manually keeping some tags
            var removeTags = ignoringKeys ? utilObjectOmit(_this.removeTags, ignoringKeys) : _this.removeTags;
            tags = utilObjectOmit(tags, Object.keys(removeTags));

            if (geometry && !skipFieldDefaults) {
              _this.fields().forEach(function (field) {
                if (field.matchGeometry(geometry) && field.key && field["default"] === tags[field.key]) {
                  delete tags[field.key];
                }
              });
            }

            delete tags.area;
            return tags;
          };

          _this.setTags = function (tags, geometry, skipFieldDefaults) {
            var addTags = _this.addTags;
            tags = Object.assign({}, tags); // shallow copy

            for (var k in addTags) {
              if (addTags[k] === '*') {
                // if this tag is ancillary, don't override an existing value since any value is okay
                if (_this.tags[k] || !tags[k] || tags[k] === 'no') {
                  tags[k] = 'yes';
                }
              } else {
                tags[k] = addTags[k];
              }
            } // Add area=yes if necessary.
            // This is necessary if the geometry is already an area (e.g. user drew an area) AND any of:
            // 1. chosen preset could be either an area or a line (`barrier=city_wall`)
            // 2. chosen preset doesn't have a key in osmAreaKeys (`railway=station`)


            if (!addTags.hasOwnProperty('area')) {
              delete tags.area;

              if (geometry === 'area') {
                var needsAreaTag = true;

                if (_this.geometry.indexOf('line') === -1) {
                  for (var _k2 in addTags) {
                    if (_k2 in osmAreaKeys) {
                      needsAreaTag = false;
                      break;
                    }
                  }
                }

                if (needsAreaTag) {
                  tags.area = 'yes';
                }
              }
            }

            if (geometry && !skipFieldDefaults) {
              _this.fields().forEach(function (field) {
                if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field["default"]) {
                  tags[field.key] = field["default"];
                }
              });
            }

            return tags;
          }; // For a preset without fields, use the fields of the parent preset.
          // Replace {preset} placeholders with the fields of the specified presets.


          function resolve(which) {
            var fieldIDs = which === 'fields' ? _this.originalFields : _this.originalMoreFields;
            var resolved = [];
            fieldIDs.forEach(function (fieldID) {
              var match = fieldID.match(/\{(.*)\}/);

              if (match !== null) {
                // a presetID wrapped in braces {}
                resolved = resolved.concat(inheritFields(match[1], which));
              } else if (allFields[fieldID]) {
                // a normal fieldID
                resolved.push(allFields[fieldID]);
              } else {
                console.log("Cannot resolve \"".concat(fieldID, "\" found in ").concat(_this.id, ".").concat(which)); // eslint-disable-line no-console
              }
            }); // no fields resolved, so use the parent's if possible

            if (!resolved.length) {
              var endIndex = _this.id.lastIndexOf('/');

              var parentID = endIndex && _this.id.substring(0, endIndex);

              if (parentID) {
                resolved = inheritFields(parentID, which);
              }
            }

            return utilArrayUniq(resolved); // returns an array of fields to inherit from the given presetID, if found

            function inheritFields(presetID, which) {
              var parent = allPresets[presetID];
              if (!parent) return [];

              if (which === 'fields') {
                return parent.fields().filter(shouldInherit);
              } else if (which === 'moreFields') {
                return parent.moreFields();
              } else {
                return [];
              }
            } // Skip `fields` for the keys which define the preset.
            // These are usually `typeCombo` fields like `shop=*`


            function shouldInherit(f) {
              if (f.key && _this.tags[f.key] !== undefined && // inherit anyway if multiple values are allowed or just a checkbox
              f.type !== 'multiCombo' && f.type !== 'semiCombo' && f.type !== 'manyCombo' && f.type !== 'check') return false;
              return true;
            }
          }

          return _this;
        }

        var _mainPresetIndex = presetIndex(); // singleton
        // `presetIndex` wraps a `presetCollection`
        // with methods for loading new data and returning defaults
        //

        function presetIndex() {
          var dispatch = dispatch$8('favoritePreset', 'recentsChange');
          var MAXRECENTS = 30; // seed the preset lists with geometry fallbacks

          var POINT = presetPreset('point', {
            name: 'Point',
            tags: {},
            geometry: ['point', 'vertex'],
            matchScore: 0.1
          });
          var LINE = presetPreset('line', {
            name: 'Line',
            tags: {},
            geometry: ['line'],
            matchScore: 0.1
          });
          var AREA = presetPreset('area', {
            name: 'Area',
            tags: {
              area: 'yes'
            },
            geometry: ['area'],
            matchScore: 0.1
          });
          var RELATION = presetPreset('relation', {
            name: 'Relation',
            tags: {},
            geometry: ['relation'],
            matchScore: 0.1
          });

          var _this = presetCollection([POINT, LINE, AREA, RELATION]);

          var _presets = {
            point: POINT,
            line: LINE,
            area: AREA,
            relation: RELATION
          };
          var _defaults = {
            point: presetCollection([POINT]),
            vertex: presetCollection([POINT]),
            line: presetCollection([LINE]),
            area: presetCollection([AREA]),
            relation: presetCollection([RELATION])
          };
          var _fields = {};
          var _categories = {};
          var _universal = [];
          var _addablePresetIDs = null; // Set of preset IDs that the user can add

          var _recents;

          var _favorites; // Index of presets by (geometry, tag key).


          var _geometryIndex = {
            point: {},
            vertex: {},
            line: {},
            area: {},
            relation: {}
          };

          var _loadPromise;

          _this.ensureLoaded = function () {
            if (_loadPromise) return _loadPromise;
            return _loadPromise = Promise.all([_mainFileFetcher.get('preset_categories'), _mainFileFetcher.get('preset_defaults'), _mainFileFetcher.get('preset_presets'), _mainFileFetcher.get('preset_fields')]).then(function (vals) {
              _this.merge({
                categories: vals[0],
                defaults: vals[1],
                presets: vals[2],
                fields: vals[3]
              });

              osmSetAreaKeys(_this.areaKeys());
              osmSetPointTags(_this.pointTags());
              osmSetVertexTags(_this.vertexTags());
            });
          }; // `merge` accepts an object containing new preset data (all properties optional):
          // {
          //   fields: {},
          //   presets: {},
          //   categories: {},
          //   defaults: {},
          //   featureCollection: {}
          //}


          _this.merge = function (d) {
            var newLocationSets = []; // Merge Fields

            if (d.fields) {
              Object.keys(d.fields).forEach(function (fieldID) {
                var f = d.fields[fieldID];

                if (f) {
                  // add or replace
                  f = presetField(fieldID, f);
                  if (f.locationSet) newLocationSets.push(f);
                  _fields[fieldID] = f;
                } else {
                  // remove
                  delete _fields[fieldID];
                }
              });
            } // Merge Presets


            if (d.presets) {
              Object.keys(d.presets).forEach(function (presetID) {
                var p = d.presets[presetID];

                if (p) {
                  // add or replace
                  var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);

                  p = presetPreset(presetID, p, isAddable, _fields, _presets);
                  if (p.locationSet) newLocationSets.push(p);
                  _presets[presetID] = p;
                } else {
                  // remove (but not if it's a fallback)
                  var existing = _presets[presetID];

                  if (existing && !existing.isFallback()) {
                    delete _presets[presetID];
                  }
                }
              });
            } // Merge Categories


            if (d.categories) {
              Object.keys(d.categories).forEach(function (categoryID) {
                var c = d.categories[categoryID];

                if (c) {
                  // add or replace
                  c = presetCategory(categoryID, c, _presets);
                  if (c.locationSet) newLocationSets.push(c);
                  _categories[categoryID] = c;
                } else {
                  // remove
                  delete _categories[categoryID];
                }
              });
            } // Rebuild _this.collection after changing presets and categories


            _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Defaults

            if (d.defaults) {
              Object.keys(d.defaults).forEach(function (geometry) {
                var def = d.defaults[geometry];

                if (Array.isArray(def)) {
                  // add or replace
                  _defaults[geometry] = presetCollection(def.map(function (id) {
                    return _presets[id] || _categories[id];
                  }).filter(Boolean));
                } else {
                  // remove
                  delete _defaults[geometry];
                }
              });
            } // Rebuild universal fields array


            _universal = Object.values(_fields).filter(function (field) {
              return field.universal;
            }); // Reset all the preset fields - they'll need to be resolved again

            Object.values(_presets).forEach(function (preset) {
              return preset.resetFields();
            }); // Rebuild geometry index

            _geometryIndex = {
              point: {},
              vertex: {},
              line: {},
              area: {},
              relation: {}
            };

            _this.collection.forEach(function (preset) {
              (preset.geometry || []).forEach(function (geometry) {
                var g = _geometryIndex[geometry];

                for (var key in preset.tags) {
                  (g[key] = g[key] || []).push(preset);
                }
              });
            }); // Merge Custom Features


            if (d.featureCollection && Array.isArray(d.featureCollection.features)) {
              _mainLocations.mergeCustomGeoJSON(d.featureCollection);
            } // Resolve all locationSet features.


            if (newLocationSets.length) {
              _mainLocations.mergeLocationSets(newLocationSets);
            }

            return _this;
          };

          _this.match = function (entity, resolver) {
            return resolver["transient"](entity, 'presetMatch', function () {
              var geometry = entity.geometry(resolver); // Treat entities on addr:interpolation lines as points, not vertices - #3241

              if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
                geometry = 'point';
              }

              var entityExtent = entity.extent(resolver);
              return _this.matchTags(entity.tags, geometry, entityExtent.center());
            });
          };

          _this.matchTags = function (tags, geometry, loc) {
            var geometryMatches = _geometryIndex[geometry];
            var address;
            var best = -1;
            var match;
            var validLocations;

            if (Array.isArray(loc)) {
              validLocations = _mainLocations.locationsAt(loc);
            }

            for (var k in tags) {
              // If any part of an address is present, allow fallback to "Address" preset - #4353
              if (/^addr:/.test(k) && geometryMatches['addr:*']) {
                address = geometryMatches['addr:*'][0];
              }

              var keyMatches = geometryMatches[k];
              if (!keyMatches) continue;

              for (var i = 0; i < keyMatches.length; i++) {
                var candidate = keyMatches[i]; // discard candidate preset if location is not valid at `loc`

                if (validLocations && candidate.locationSetID) {
                  if (!validLocations[candidate.locationSetID]) continue;
                }

                var score = candidate.matchScore(tags);

                if (score > best) {
                  best = score;
                  match = candidate;
                }
              }
            }

            if (address && (!match || match.isFallback())) {
              match = address;
            }

            return match || _this.fallback(geometry);
          };

          _this.allowsVertex = function (entity, resolver) {
            if (entity.type !== 'node') return false;
            if (Object.keys(entity.tags).length === 0) return true;
            return resolver["transient"](entity, 'vertexMatch', function () {
              // address lines allow vertices to act as standalone points
              if (entity.isOnAddressLine(resolver)) return true;
              var geometries = osmNodeGeometriesForTags(entity.tags);
              if (geometries.vertex) return true;
              if (geometries.point) return false; // allow vertices for unspecified points

              return true;
            });
          }; // Because of the open nature of tagging, iD will never have a complete
          // list of tags used in OSM, so we want it to have logic like "assume
          // that a closed way with an amenity tag is an area, unless the amenity
          // is one of these specific types". This function computes a structure
          // that allows testing of such conditions, based on the presets designated
          // as as supporting (or not supporting) the area geometry.
          //
          // The returned object L is a keeplist/discardlist of tags. A closed way
          // with a tag (k, v) is considered to be an area if `k in L && !(v in L[k])`
          // (see `Way#isArea()`). In other words, the keys of L form the keeplist,
          // and the subkeys form the discardlist.


          _this.areaKeys = function () {
            // The ignore list is for keys that imply lines. (We always add `area=yes` for exceptions)
            var ignore = ['barrier', 'highway', 'footway', 'railway', 'junction', 'type'];
            var areaKeys = {}; // ignore name-suggestion-index and deprecated presets

            var presets = _this.collection.filter(function (p) {
              return !p.suggestion && !p.replacement;
            }); // keeplist


            presets.forEach(function (p) {
              var keys = p.tags && Object.keys(p.tags);
              var key = keys && keys.length && keys[0]; // pick the first tag

              if (!key) return;
              if (ignore.indexOf(key) !== -1) return;

              if (p.geometry.indexOf('area') !== -1) {
                // probably an area..
                areaKeys[key] = areaKeys[key] || {};
              }
            }); // discardlist

            presets.forEach(function (p) {
              var key;

              for (key in p.addTags) {
                // examine all addTags to get a better sense of what can be tagged on lines - #6800
                var value = p.addTags[key];

                if (key in areaKeys && // probably an area...
                p.geometry.indexOf('line') !== -1 && // but sometimes a line
                value !== '*') {
                  areaKeys[key][value] = true;
                }
              }
            });
            return areaKeys;
          };

          _this.pointTags = function () {
            return _this.collection.reduce(function (pointTags, d) {
              // ignore name-suggestion-index, deprecated, and generic presets
              if (d.suggestion || d.replacement || d.searchable === false) return pointTags; // only care about the primary tag

              var keys = d.tags && Object.keys(d.tags);
              var key = keys && keys.length && keys[0]; // pick the first tag

              if (!key) return pointTags; // if this can be a point

              if (d.geometry.indexOf('point') !== -1) {
                pointTags[key] = pointTags[key] || {};
                pointTags[key][d.tags[key]] = true;
              }

              return pointTags;
            }, {});
          };

          _this.vertexTags = function () {
            return _this.collection.reduce(function (vertexTags, d) {
              // ignore name-suggestion-index, deprecated, and generic presets
              if (d.suggestion || d.replacement || d.searchable === false) return vertexTags; // only care about the primary tag

              var keys = d.tags && Object.keys(d.tags);
              var key = keys && keys.length && keys[0]; // pick the first tag

              if (!key) return vertexTags; // if this can be a vertex

              if (d.geometry.indexOf('vertex') !== -1) {
                vertexTags[key] = vertexTags[key] || {};
                vertexTags[key][d.tags[key]] = true;
              }

              return vertexTags;
            }, {});
          };

          _this.field = function (id) {
            return _fields[id];
          };

          _this.universal = function () {
            return _universal;
          };

          _this.defaults = function (geometry, n, startWithRecents, loc) {
            var recents = [];

            if (startWithRecents) {
              recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
            }

            var defaults;

            if (_addablePresetIDs) {
              defaults = Array.from(_addablePresetIDs).map(function (id) {
                var preset = _this.item(id);

                if (preset && preset.matchGeometry(geometry)) return preset;
                return null;
              }).filter(Boolean);
            } else {
              defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
            }

            var result = presetCollection(utilArrayUniq(recents.concat(defaults)).slice(0, n - 1));

            if (Array.isArray(loc)) {
              var validLocations = _mainLocations.locationsAt(loc);
              result.collection = result.collection.filter(function (a) {
                return !a.locationSetID || validLocations[a.locationSetID];
              });
            }

            return result;
          }; // pass a Set of addable preset ids


          _this.addablePresetIDs = function (val) {
            if (!arguments.length) return _addablePresetIDs; // accept and convert arrays

            if (Array.isArray(val)) val = new Set(val);
            _addablePresetIDs = val;

            if (_addablePresetIDs) {
              // reset all presets
              _this.collection.forEach(function (p) {
                // categories aren't addable
                if (p.addable) p.addable(_addablePresetIDs.has(p.id));
              });
            } else {
              _this.collection.forEach(function (p) {
                if (p.addable) p.addable(true);
              });
            }

            return _this;
          };

          _this.recent = function () {
            return presetCollection(utilArrayUniq(_this.getRecents().map(function (d) {
              return d.preset;
            })));
          };

          function RibbonItem(preset, source) {
            var item = {};
            item.preset = preset;
            item.source = source;

            item.isFavorite = function () {
              return item.source === 'favorite';
            };

            item.isRecent = function () {
              return item.source === 'recent';
            };

            item.matches = function (preset) {
              return item.preset.id === preset.id;
            };

            item.minified = function () {
              return {
                pID: item.preset.id
              };
            };

            return item;
          }

          function ribbonItemForMinified(d, source) {
            if (d && d.pID) {
              var preset = _this.item(d.pID);

              if (!preset) return null;
              return RibbonItem(preset, source);
            }

            return null;
          }

          _this.getGenericRibbonItems = function () {
            return ['point', 'line', 'area'].map(function (id) {
              return RibbonItem(_this.item(id), 'generic');
            });
          };

          _this.getAddable = function () {
            if (!_addablePresetIDs) return [];
            return _addablePresetIDs.map(function (id) {
              var preset = _this.item(id);

              if (preset) return RibbonItem(preset, 'addable');
              return null;
            }).filter(Boolean);
          };

          function setRecents(items) {
            _recents = items;
            var minifiedItems = items.map(function (d) {
              return d.minified();
            });
            corePreferences('preset_recents', JSON.stringify(minifiedItems));
            dispatch.call('recentsChange');
          }

          _this.getRecents = function () {
            if (!_recents) {
              // fetch from local storage
              _recents = (JSON.parse(corePreferences('preset_recents')) || []).reduce(function (acc, d) {
                var item = ribbonItemForMinified(d, 'recent');
                if (item && item.preset.addable()) acc.push(item);
                return acc;
              }, []);
            }

            return _recents;
          };

          _this.addRecent = function (preset, besidePreset, after) {
            var recents = _this.getRecents();

            var beforeItem = _this.recentMatching(besidePreset);

            var toIndex = recents.indexOf(beforeItem);
            if (after) toIndex += 1;
            var newItem = RibbonItem(preset, 'recent');
            recents.splice(toIndex, 0, newItem);
            setRecents(recents);
          };

          _this.removeRecent = function (preset) {
            var item = _this.recentMatching(preset);

            if (item) {
              var items = _this.getRecents();

              items.splice(items.indexOf(item), 1);
              setRecents(items);
            }
          };

          _this.recentMatching = function (preset) {
            var items = _this.getRecents();

            for (var i in items) {
              if (items[i].matches(preset)) {
                return items[i];
              }
            }

            return null;
          };

          _this.moveItem = function (items, fromIndex, toIndex) {
            if (fromIndex === toIndex || fromIndex < 0 || toIndex < 0 || fromIndex >= items.length || toIndex >= items.length) return null;
            items.splice(toIndex, 0, items.splice(fromIndex, 1)[0]);
            return items;
          };

          _this.moveRecent = function (item, beforeItem) {
            var recents = _this.getRecents();

            var fromIndex = recents.indexOf(item);
            var toIndex = recents.indexOf(beforeItem);

            var items = _this.moveItem(recents, fromIndex, toIndex);

            if (items) setRecents(items);
          };

          _this.setMostRecent = function (preset) {
            if (preset.searchable === false) return;

            var items = _this.getRecents();

            var item = _this.recentMatching(preset);

            if (item) {
              items.splice(items.indexOf(item), 1);
            } else {
              item = RibbonItem(preset, 'recent');
            } // remove the last recent (first in, first out)


            while (items.length >= MAXRECENTS) {
              items.pop();
            } // prepend array


            items.unshift(item);
            setRecents(items);
          };

          function setFavorites(items) {
            _favorites = items;
            var minifiedItems = items.map(function (d) {
              return d.minified();
            });
            corePreferences('preset_favorites', JSON.stringify(minifiedItems)); // call update

            dispatch.call('favoritePreset');
          }

          _this.addFavorite = function (preset, besidePreset, after) {
            var favorites = _this.getFavorites();

            var beforeItem = _this.favoriteMatching(besidePreset);

            var toIndex = favorites.indexOf(beforeItem);
            if (after) toIndex += 1;
            var newItem = RibbonItem(preset, 'favorite');
            favorites.splice(toIndex, 0, newItem);
            setFavorites(favorites);
          };

          _this.toggleFavorite = function (preset) {
            var favs = _this.getFavorites();

            var favorite = _this.favoriteMatching(preset);

            if (favorite) {
              favs.splice(favs.indexOf(favorite), 1);
            } else {
              // only allow 10 favorites
              if (favs.length === 10) {
                // remove the last favorite (last in, first out)
                favs.pop();
              } // append array


              favs.push(RibbonItem(preset, 'favorite'));
            }

            setFavorites(favs);
          };

          _this.removeFavorite = function (preset) {
            var item = _this.favoriteMatching(preset);

            if (item) {
              var items = _this.getFavorites();

              items.splice(items.indexOf(item), 1);
              setFavorites(items);
            }
          };

          _this.getFavorites = function () {
            if (!_favorites) {
              // fetch from local storage
              var rawFavorites = JSON.parse(corePreferences('preset_favorites'));

              if (!rawFavorites) {
                rawFavorites = [];
                corePreferences('preset_favorites', JSON.stringify(rawFavorites));
              }

              _favorites = rawFavorites.reduce(function (output, d) {
                var item = ribbonItemForMinified(d, 'favorite');
                if (item && item.preset.addable()) output.push(item);
                return output;
              }, []);
            }

            return _favorites;
          };

          _this.favoriteMatching = function (preset) {
            var favs = _this.getFavorites();

            for (var index in favs) {
              if (favs[index].matches(preset)) {
                return favs[index];
              }
            }

            return null;
          };

          return utilRebind(_this, dispatch, 'on');
        }

        function utilTagText(entity) {
          var obj = entity && entity.tags || {};
          return Object.keys(obj).map(function (k) {
            return k + '=' + obj[k];
          }).join(', ');
        }
        function utilTotalExtent(array, graph) {
          var extent = geoExtent();
          var val, entity;

          for (var i = 0; i < array.length; i++) {
            val = array[i];
            entity = typeof val === 'string' ? graph.hasEntity(val) : val;

            if (entity) {
              extent._extend(entity.extent(graph));
            }
          }

          return extent;
        }
        function utilTagDiff(oldTags, newTags) {
          var tagDiff = [];
          var keys = utilArrayUnion(Object.keys(oldTags), Object.keys(newTags)).sort();
          keys.forEach(function (k) {
            var oldVal = oldTags[k];
            var newVal = newTags[k];

            if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
              tagDiff.push({
                type: '-',
                key: k,
                oldVal: oldVal,
                newVal: newVal,
                display: '- ' + k + '=' + oldVal
              });
            }

            if ((newVal || newVal === '') && (oldVal === undefined || newVal !== oldVal)) {
              tagDiff.push({
                type: '+',
                key: k,
                oldVal: oldVal,
                newVal: newVal,
                display: '+ ' + k + '=' + newVal
              });
            }
          });
          return tagDiff;
        }
        function utilEntitySelector(ids) {
          return ids.length ? '.' + ids.join(',.') : 'nothing';
        } // returns an selector to select entity ids for:
        //  - entityIDs passed in
        //  - shallow descendant entityIDs for any of those entities that are relations

        function utilEntityOrMemberSelector(ids, graph) {
          var seen = new Set(ids);
          ids.forEach(collectShallowDescendants);
          return utilEntitySelector(Array.from(seen));

          function collectShallowDescendants(id) {
            var entity = graph.hasEntity(id);
            if (!entity || entity.type !== 'relation') return;
            entity.members.map(function (member) {
              return member.id;
            }).forEach(function (id) {
              seen.add(id);
            });
          }
        } // returns an selector to select entity ids for:
        //  - entityIDs passed in
        //  - deep descendant entityIDs for any of those entities that are relations

        function utilEntityOrDeepMemberSelector(ids, graph) {
          return utilEntitySelector(utilEntityAndDeepMemberIDs(ids, graph));
        } // returns an selector to select entity ids for:
        //  - entityIDs passed in
        //  - deep descendant entityIDs for any of those entities that are relations

        function utilEntityAndDeepMemberIDs(ids, graph) {
          var seen = new Set();
          ids.forEach(collectDeepDescendants);
          return Array.from(seen);

          function collectDeepDescendants(id) {
            if (seen.has(id)) return;
            seen.add(id);
            var entity = graph.hasEntity(id);
            if (!entity || entity.type !== 'relation') return;
            entity.members.map(function (member) {
              return member.id;
            }).forEach(collectDeepDescendants); // recurse
          }
        } // returns an selector to select entity ids for:
        //  - deep descendant entityIDs for any of those entities that are relations

        function utilDeepMemberSelector(ids, graph, skipMultipolgonMembers) {
          var idsSet = new Set(ids);
          var seen = new Set();
          var returners = new Set();
          ids.forEach(collectDeepDescendants);
          return utilEntitySelector(Array.from(returners));

          function collectDeepDescendants(id) {
            if (seen.has(id)) return;
            seen.add(id);

            if (!idsSet.has(id)) {
              returners.add(id);
            }

            var entity = graph.hasEntity(id);
            if (!entity || entity.type !== 'relation') return;
            if (skipMultipolgonMembers && entity.isMultipolygon()) return;
            entity.members.map(function (member) {
              return member.id;
            }).forEach(collectDeepDescendants); // recurse
          }
        } // Adds or removes highlight styling for the specified entities

        function utilHighlightEntities(ids, highlighted, context) {
          context.surface().selectAll(utilEntityOrDeepMemberSelector(ids, context.graph())).classed('highlighted', highlighted);
        } // returns an Array that is the union of:
        //  - nodes for any nodeIDs passed in
        //  - child nodes of any wayIDs passed in
        //  - descendant member and child nodes of relationIDs passed in

        function utilGetAllNodes(ids, graph) {
          var seen = new Set();
          var nodes = new Set();
          ids.forEach(collectNodes);
          return Array.from(nodes);

          function collectNodes(id) {
            if (seen.has(id)) return;
            seen.add(id);
            var entity = graph.hasEntity(id);
            if (!entity) return;

            if (entity.type === 'node') {
              nodes.add(entity);
            } else if (entity.type === 'way') {
              entity.nodes.forEach(collectNodes);
            } else {
              entity.members.map(function (member) {
                return member.id;
              }).forEach(collectNodes); // recurse
            }
          }
        }
        function utilDisplayName(entity) {
          var localizedNameKey = 'name:' + _mainLocalizer.languageCode().toLowerCase();
          var name = entity.tags[localizedNameKey] || entity.tags.name || '';
          if (name) return name;
          var tags = {
            direction: entity.tags.direction,
            from: entity.tags.from,
            network: entity.tags.cycle_network || entity.tags.network,
            ref: entity.tags.ref,
            to: entity.tags.to,
            via: entity.tags.via
          };
          var keyComponents = [];

          if (tags.network) {
            keyComponents.push('network');
          }

          if (tags.ref) {
            keyComponents.push('ref');
          } // Routes may need more disambiguation based on direction or destination


          if (entity.tags.route) {
            if (tags.direction) {
              keyComponents.push('direction');
            } else if (tags.from && tags.to) {
              keyComponents.push('from');
              keyComponents.push('to');

              if (tags.via) {
                keyComponents.push('via');
              }
            }
          }

          if (keyComponents.length) {
            name = _t('inspector.display_name.' + keyComponents.join('_'), tags);
          }

          return name;
        }
        function utilDisplayNameForPath(entity) {
          var name = utilDisplayName(entity);
          var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;

          if (!isFirefox && name && rtlRegex.test(name)) {
            name = fixRTLTextForSvg(name);
          }

          return name;
        }
        function utilDisplayType(id) {
          return {
            n: _t('inspector.node'),
            w: _t('inspector.way'),
            r: _t('inspector.relation')
          }[id.charAt(0)];
        } // `utilDisplayLabel`
        // Returns a string suitable for display
        // By default returns something like name/ref, fallback to preset type, fallback to OSM type
        //   "Main Street" or "Tertiary Road"
        // If `verbose=true`, include both preset name and feature name.
        //   "Tertiary Road Main Street"
        //

        function utilDisplayLabel(entity, graphOrGeometry, verbose) {
          var result;
          var displayName = utilDisplayName(entity);
          var preset = typeof graphOrGeometry === 'string' ? _mainPresetIndex.matchTags(entity.tags, graphOrGeometry) : _mainPresetIndex.match(entity, graphOrGeometry);
          var presetName = preset && (preset.suggestion ? preset.subtitle() : preset.name());

          if (verbose) {
            result = [presetName, displayName].filter(Boolean).join(' ');
          } else {
            result = displayName || presetName;
          } // Fallback to the OSM type (node/way/relation)


          return result || utilDisplayType(entity.id);
        }
        function utilEntityRoot(entityType) {
          return {
            node: 'n',
            way: 'w',
            relation: 'r'
          }[entityType];
        } // Returns a single object containing the tags of all the given entities.
        // Example:
        // {
        //   highway: 'service',
        //   service: 'parking_aisle'
        // }
        //           +
        // {
        //   highway: 'service',
        //   service: 'driveway',
        //   width: '3'
        // }
        //           =
        // {
        //   highway: 'service',
        //   service: [ 'driveway', 'parking_aisle' ],
        //   width: [ '3', undefined ]
        // }

        function utilCombinedTags(entityIDs, graph) {
          var tags = {};
          var tagCounts = {};
          var allKeys = new Set();
          var entities = entityIDs.map(function (entityID) {
            return graph.hasEntity(entityID);
          }).filter(Boolean); // gather the aggregate keys

          entities.forEach(function (entity) {
            var keys = Object.keys(entity.tags).filter(Boolean);
            keys.forEach(function (key) {
              allKeys.add(key);
            });
          });
          entities.forEach(function (entity) {
            allKeys.forEach(function (key) {
              var value = entity.tags[key]; // purposely allow `undefined`

              if (!tags.hasOwnProperty(key)) {
                // first value, set as raw
                tags[key] = value;
              } else {
                if (!Array.isArray(tags[key])) {
                  if (tags[key] !== value) {
                    // first alternate value, replace single value with array
                    tags[key] = [tags[key], value];
                  }
                } else {
                  // type is array
                  if (tags[key].indexOf(value) === -1) {
                    // subsequent alternate value, add to array
                    tags[key].push(value);
                  }
                }
              }

              var tagHash = key + '=' + value;
              if (!tagCounts[tagHash]) tagCounts[tagHash] = 0;
              tagCounts[tagHash] += 1;
            });
          });

          for (var key in tags) {
            if (!Array.isArray(tags[key])) continue; // sort values by frequency then alphabetically

            tags[key] = tags[key].sort(function (val1, val2) {
              var key = key; // capture

              var count2 = tagCounts[key + '=' + val2];
              var count1 = tagCounts[key + '=' + val1];

              if (count2 !== count1) {
                return count2 - count1;
              }

              if (val2 && val1) {
                return val1.localeCompare(val2);
              }

              return val1 ? 1 : -1;
            });
          }

          return tags;
        }
        function utilStringQs(str) {
          var i = 0; // advance past any leading '?' or '#' characters

          while (i < str.length && (str[i] === '?' || str[i] === '#')) {
            i++;
          }

          str = str.slice(i);
          return str.split('&').reduce(function (obj, pair) {
            var parts = pair.split('=');

            if (parts.length === 2) {
              obj[parts[0]] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
            }

            return obj;
          }, {});
        }
        function utilQsString(obj, noencode) {
          // encode everything except special characters used in certain hash parameters:
          // "/" in map states, ":", ",", {" and "}" in background
          function softEncode(s) {
            return encodeURIComponent(s).replace(/(%2F|%3A|%2C|%7B|%7D)/g, decodeURIComponent);
          }

          return Object.keys(obj).sort().map(function (key) {
            return encodeURIComponent(key) + '=' + (noencode ? softEncode(obj[key]) : encodeURIComponent(obj[key]));
          }).join('&');
        }
        function utilPrefixDOMProperty(property) {
          var prefixes = ['webkit', 'ms', 'moz', 'o'];
          var i = -1;
          var n = prefixes.length;
          var s = document.body;
          if (property in s) return property;
          property = property.substr(0, 1).toUpperCase() + property.substr(1);

          while (++i < n) {
            if (prefixes[i] + property in s) {
              return prefixes[i] + property;
            }
          }

          return false;
        }
        function utilPrefixCSSProperty(property) {
          var prefixes = ['webkit', 'ms', 'Moz', 'O'];
          var i = -1;
          var n = prefixes.length;
          var s = document.body.style;

          if (property.toLowerCase() in s) {
            return property.toLowerCase();
          }

          while (++i < n) {
            if (prefixes[i] + property in s) {
              return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
            }
          }

          return false;
        }
        var transformProperty;
        function utilSetTransform(el, x, y, scale) {
          var prop = transformProperty = transformProperty || utilPrefixCSSProperty('Transform');
          var translate = utilDetect().opera ? 'translate(' + x + 'px,' + y + 'px)' : 'translate3d(' + x + 'px,' + y + 'px,0)';
          return el.style(prop, translate + (scale ? ' scale(' + scale + ')' : ''));
        } // Calculates Levenshtein distance between two strings
        // see:  https://en.wikipedia.org/wiki/Levenshtein_distance
        // first converts the strings to lowercase and replaces diacritic marks with ascii equivalents.

        function utilEditDistance(a, b) {
          a = remove$6(a.toLowerCase());
          b = remove$6(b.toLowerCase());
          if (a.length === 0) return b.length;
          if (b.length === 0) return a.length;
          var matrix = [];
          var i, j;

          for (i = 0; i <= b.length; i++) {
            matrix[i] = [i];
          }

          for (j = 0; j <= a.length; j++) {
            matrix[0][j] = j;
          }

          for (i = 1; i <= b.length; i++) {
            for (j = 1; j <= a.length; j++) {
              if (b.charAt(i - 1) === a.charAt(j - 1)) {
                matrix[i][j] = matrix[i - 1][j - 1];
              } else {
                matrix[i][j] = Math.min(matrix[i - 1][j - 1] + 1, // substitution
                Math.min(matrix[i][j - 1] + 1, // insertion
                matrix[i - 1][j] + 1)); // deletion
              }
            }
          }

          return matrix[b.length][a.length];
        } // a d3.mouse-alike which
        // 1. Only works on HTML elements, not SVG
        // 2. Does not cause style recalculation

        function utilFastMouse(container) {
          var rect = container.getBoundingClientRect();
          var rectLeft = rect.left;
          var rectTop = rect.top;
          var clientLeft = +container.clientLeft;
          var clientTop = +container.clientTop;
          return function (e) {
            return [e.clientX - rectLeft - clientLeft, e.clientY - rectTop - clientTop];
          };
        }
        function utilAsyncMap(inputs, func, callback) {
          var remaining = inputs.length;
          var results = [];
          var errors = [];
          inputs.forEach(function (d, i) {
            func(d, function done(err, data) {
              errors[i] = err;
              results[i] = data;
              remaining--;
              if (!remaining) callback(errors, results);
            });
          });
        } // wraps an index to an interval [0..length-1]

        function utilWrap(index, length) {
          if (index < 0) {
            index += Math.ceil(-index / length) * length;
          }

          return index % length;
        }
        /**
         * a replacement for functor
         *
         * @param {*} value any value
         * @returns {Function} a function that returns that value or the value if it's a function
         */

        function utilFunctor(value) {
          if (typeof value === 'function') return value;
          return function () {
            return value;
          };
        }
        function utilNoAuto(selection) {
          var isText = selection.size() && selection.node().tagName.toLowerCase() === 'textarea';
          return selection // assign 'new-password' even for non-password fields to prevent browsers (Chrome) ignoring 'off'
          .attr('autocomplete', 'new-password').attr('autocorrect', 'off').attr('autocapitalize', 'off').attr('spellcheck', isText ? 'true' : 'false');
        } // https://stackoverflow.com/questions/194846/is-there-any-kind-of-hash-code-function-in-javascript
        // https://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/

        function utilHashcode(str) {
          var hash = 0;

          if (str.length === 0) {
            return hash;
          }

          for (var i = 0; i < str.length; i++) {
            var _char = str.charCodeAt(i);

            hash = (hash << 5) - hash + _char;
            hash = hash & hash; // Convert to 32bit integer
          }

          return hash;
        } // Returns version of `str` with all runs of special characters replaced by `_`;
        // suitable for HTML ids, classes, selectors, etc.

        function utilSafeClassName(str) {
          return str.toLowerCase().replace(/[^a-z0-9]+/g, '_');
        } // Returns string based on `val` that is highly unlikely to collide with an id
        // used previously or that's present elsewhere in the document. Useful for preventing
        // browser-provided autofills or when embedding iD on pages with unknown elements.

        function utilUniqueDomId(val) {
          return 'ideditor-' + utilSafeClassName(val.toString()) + '-' + new Date().getTime().toString();
        } // Returns the length of `str` in unicode characters. This can be less than
        // `String.length()` since a single unicode character can be composed of multiple
        // JavaScript UTF-16 code units.

        function utilUnicodeCharsCount(str) {
          // Native ES2015 implementations of `Array.from` split strings into unicode characters
          return Array.from(str).length;
        } // Returns a new string representing `str` cut from its start to `limit` length
        // in unicode characters. Note that this runs the risk of splitting graphemes.

        function utilUnicodeCharsTruncated(str, limit) {
          return Array.from(str).slice(0, limit).join('');
        } // Variation of d3.json (https://github.com/d3/d3-fetch/blob/master/src/json.js)

        function utilFetchJson(resourse, init) {
          return fetch(resourse, init).then(function (response) {
            // fetch in PhantomJS tests may return ok=false and status=0 even if it's okay
            if (!response.ok && response.status !== 0 || !response.json) throw new Error(response.status + ' ' + response.statusText);
            if (response.status === 204 || response.status === 205) return;
            return response.json();
          });
        }

        function osmEntity(attrs) {
          // For prototypal inheritance.
          if (this instanceof osmEntity) return; // Create the appropriate subtype.

          if (attrs && attrs.type) {
            return osmEntity[attrs.type].apply(this, arguments);
          } else if (attrs && attrs.id) {
            return osmEntity[osmEntity.id.type(attrs.id)].apply(this, arguments);
          } // Initialize a generic Entity (used only in tests).


          return new osmEntity().initialize(arguments);
        }

        osmEntity.id = function (type) {
          return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
        };

        osmEntity.id.next = {
          changeset: -1,
          node: -1,
          way: -1,
          relation: -1
        };

        osmEntity.id.fromOSM = function (type, id) {
          return type[0] + id;
        };

        osmEntity.id.toOSM = function (id) {
          return id.slice(1);
        };

        osmEntity.id.type = function (id) {
          return {
            'c': 'changeset',
            'n': 'node',
            'w': 'way',
            'r': 'relation'
          }[id[0]];
        }; // A function suitable for use as the second argument to d3.selection#data().


        osmEntity.key = function (entity) {
          return entity.id + 'v' + (entity.v || 0);
        };

        var _deprecatedTagValuesByKey;

        osmEntity.deprecatedTagValuesByKey = function (dataDeprecated) {
          if (!_deprecatedTagValuesByKey) {
            _deprecatedTagValuesByKey = {};
            dataDeprecated.forEach(function (d) {
              var oldKeys = Object.keys(d.old);

              if (oldKeys.length === 1) {
                var oldKey = oldKeys[0];
                var oldValue = d.old[oldKey];

                if (oldValue !== '*') {
                  if (!_deprecatedTagValuesByKey[oldKey]) {
                    _deprecatedTagValuesByKey[oldKey] = [oldValue];
                  } else {
                    _deprecatedTagValuesByKey[oldKey].push(oldValue);
                  }
                }
              }
            });
          }

          return _deprecatedTagValuesByKey;
        };

        osmEntity.prototype = {
          tags: {},
          initialize: function initialize(sources) {
            for (var i = 0; i < sources.length; ++i) {
              var source = sources[i];

              for (var prop in source) {
                if (Object.prototype.hasOwnProperty.call(source, prop)) {
                  if (source[prop] === undefined) {
                    delete this[prop];
                  } else {
                    this[prop] = source[prop];
                  }
                }
              }
            }

            if (!this.id && this.type) {
              this.id = osmEntity.id(this.type);
            }

            if (!this.hasOwnProperty('visible')) {
              this.visible = true;
            }

            if (debug) {
              Object.freeze(this);
              Object.freeze(this.tags);
              if (this.loc) Object.freeze(this.loc);
              if (this.nodes) Object.freeze(this.nodes);
              if (this.members) Object.freeze(this.members);
            }

            return this;
          },
          copy: function copy(resolver, copies) {
            if (copies[this.id]) return copies[this.id];
            var copy = osmEntity(this, {
              id: undefined,
              user: undefined,
              version: undefined
            });
            copies[this.id] = copy;
            return copy;
          },
          osmId: function osmId() {
            return osmEntity.id.toOSM(this.id);
          },
          isNew: function isNew() {
            return this.osmId() < 0;
          },
          update: function update(attrs) {
            return osmEntity(this, attrs, {
              v: 1 + (this.v || 0)
            });
          },
          mergeTags: function mergeTags(tags) {
            var merged = Object.assign({}, this.tags); // shallow copy

            var changed = false;

            for (var k in tags) {
              var t1 = merged[k];
              var t2 = tags[k];

              if (!t1) {
                changed = true;
                merged[k] = t2;
              } else if (t1 !== t2) {
                changed = true;
                merged[k] = utilUnicodeCharsTruncated(utilArrayUnion(t1.split(/;\s*/), t2.split(/;\s*/)).join(';'), 255 // avoid exceeding character limit; see also services/osm.js -> maxCharsForTagValue()
                );
              }
            }

            return changed ? this.update({
              tags: merged
            }) : this;
          },
          intersects: function intersects(extent, resolver) {
            return this.extent(resolver).intersects(extent);
          },
          hasNonGeometryTags: function hasNonGeometryTags() {
            return Object.keys(this.tags).some(function (k) {
              return k !== 'area';
            });
          },
          hasParentRelations: function hasParentRelations(resolver) {
            return resolver.parentRelations(this).length > 0;
          },
          hasInterestingTags: function hasInterestingTags() {
            return Object.keys(this.tags).some(osmIsInterestingTag);
          },
          isHighwayIntersection: function isHighwayIntersection() {
            return false;
          },
          isDegenerate: function isDegenerate() {
            return true;
          },
          deprecatedTags: function deprecatedTags(dataDeprecated) {
            var tags = this.tags; // if there are no tags, none can be deprecated

            if (Object.keys(tags).length === 0) return [];
            var deprecated = [];
            dataDeprecated.forEach(function (d) {
              var oldKeys = Object.keys(d.old);

              if (d.replace) {
                var hasExistingValues = Object.keys(d.replace).some(function (replaceKey) {
                  if (!tags[replaceKey] || d.old[replaceKey]) return false;
                  var replaceValue = d.replace[replaceKey];
                  if (replaceValue === '*') return false;
                  if (replaceValue === tags[replaceKey]) return false;
                  return true;
                }); // don't flag deprecated tags if the upgrade path would overwrite existing data - #7843

                if (hasExistingValues) return;
              }

              var matchesDeprecatedTags = oldKeys.every(function (oldKey) {
                if (!tags[oldKey]) return false;
                if (d.old[oldKey] === '*') return true;
                if (d.old[oldKey] === tags[oldKey]) return true;
                var vals = tags[oldKey].split(';').filter(Boolean);

                if (vals.length === 0) {
                  return false;
                } else if (vals.length > 1) {
                  return vals.indexOf(d.old[oldKey]) !== -1;
                } else {
                  if (tags[oldKey] === d.old[oldKey]) {
                    if (d.replace && d.old[oldKey] === d.replace[oldKey]) {
                      var replaceKeys = Object.keys(d.replace);
                      return !replaceKeys.every(function (replaceKey) {
                        return tags[replaceKey] === d.replace[replaceKey];
                      });
                    } else {
                      return true;
                    }
                  }
                }

                return false;
              });

              if (matchesDeprecatedTags) {
                deprecated.push(d);
              }
            });
            return deprecated;
          }
        };

        function osmLanes(entity) {
          if (entity.type !== 'way') return null;
          if (!entity.tags.highway) return null;
          var tags = entity.tags;
          var isOneWay = entity.isOneWay();
          var laneCount = getLaneCount(tags, isOneWay);
          var maxspeed = parseMaxspeed(tags);
          var laneDirections = parseLaneDirections(tags, isOneWay, laneCount);
          var forward = laneDirections.forward;
          var backward = laneDirections.backward;
          var bothways = laneDirections.bothways; // parse the piped string 'x|y|z' format

          var turnLanes = {};
          turnLanes.unspecified = parseTurnLanes(tags['turn:lanes']);
          turnLanes.forward = parseTurnLanes(tags['turn:lanes:forward']);
          turnLanes.backward = parseTurnLanes(tags['turn:lanes:backward']);
          var maxspeedLanes = {};
          maxspeedLanes.unspecified = parseMaxspeedLanes(tags['maxspeed:lanes'], maxspeed);
          maxspeedLanes.forward = parseMaxspeedLanes(tags['maxspeed:lanes:forward'], maxspeed);
          maxspeedLanes.backward = parseMaxspeedLanes(tags['maxspeed:lanes:backward'], maxspeed);
          var psvLanes = {};
          psvLanes.unspecified = parseMiscLanes(tags['psv:lanes']);
          psvLanes.forward = parseMiscLanes(tags['psv:lanes:forward']);
          psvLanes.backward = parseMiscLanes(tags['psv:lanes:backward']);
          var busLanes = {};
          busLanes.unspecified = parseMiscLanes(tags['bus:lanes']);
          busLanes.forward = parseMiscLanes(tags['bus:lanes:forward']);
          busLanes.backward = parseMiscLanes(tags['bus:lanes:backward']);
          var taxiLanes = {};
          taxiLanes.unspecified = parseMiscLanes(tags['taxi:lanes']);
          taxiLanes.forward = parseMiscLanes(tags['taxi:lanes:forward']);
          taxiLanes.backward = parseMiscLanes(tags['taxi:lanes:backward']);
          var hovLanes = {};
          hovLanes.unspecified = parseMiscLanes(tags['hov:lanes']);
          hovLanes.forward = parseMiscLanes(tags['hov:lanes:forward']);
          hovLanes.backward = parseMiscLanes(tags['hov:lanes:backward']);
          var hgvLanes = {};
          hgvLanes.unspecified = parseMiscLanes(tags['hgv:lanes']);
          hgvLanes.forward = parseMiscLanes(tags['hgv:lanes:forward']);
          hgvLanes.backward = parseMiscLanes(tags['hgv:lanes:backward']);
          var bicyclewayLanes = {};
          bicyclewayLanes.unspecified = parseBicycleWay(tags['bicycleway:lanes']);
          bicyclewayLanes.forward = parseBicycleWay(tags['bicycleway:lanes:forward']);
          bicyclewayLanes.backward = parseBicycleWay(tags['bicycleway:lanes:backward']);
          var lanesObj = {
            forward: [],
            backward: [],
            unspecified: []
          }; // map forward/backward/unspecified of each lane type to lanesObj

          mapToLanesObj(lanesObj, turnLanes, 'turnLane');
          mapToLanesObj(lanesObj, maxspeedLanes, 'maxspeed');
          mapToLanesObj(lanesObj, psvLanes, 'psv');
          mapToLanesObj(lanesObj, busLanes, 'bus');
          mapToLanesObj(lanesObj, taxiLanes, 'taxi');
          mapToLanesObj(lanesObj, hovLanes, 'hov');
          mapToLanesObj(lanesObj, hgvLanes, 'hgv');
          mapToLanesObj(lanesObj, bicyclewayLanes, 'bicycleway');
          return {
            metadata: {
              count: laneCount,
              oneway: isOneWay,
              forward: forward,
              backward: backward,
              bothways: bothways,
              turnLanes: turnLanes,
              maxspeed: maxspeed,
              maxspeedLanes: maxspeedLanes,
              psvLanes: psvLanes,
              busLanes: busLanes,
              taxiLanes: taxiLanes,
              hovLanes: hovLanes,
              hgvLanes: hgvLanes,
              bicyclewayLanes: bicyclewayLanes
            },
            lanes: lanesObj
          };
        }

        function getLaneCount(tags, isOneWay) {
          var count;

          if (tags.lanes) {
            count = parseInt(tags.lanes, 10);

            if (count > 0) {
              return count;
            }
          }

          switch (tags.highway) {
            case 'trunk':
            case 'motorway':
              count = isOneWay ? 2 : 4;
              break;

            default:
              count = isOneWay ? 1 : 2;
              break;
          }

          return count;
        }

        function parseMaxspeed(tags) {
          var maxspeed = tags.maxspeed;
          if (!maxspeed) return;
          var maxspeedRegex = /^([0-9][\.0-9]+?)(?:[ ]?(?:km\/h|kmh|kph|mph|knots))?$/;
          if (!maxspeedRegex.test(maxspeed)) return;
          return parseInt(maxspeed, 10);
        }

        function parseLaneDirections(tags, isOneWay, laneCount) {
          var forward = parseInt(tags['lanes:forward'], 10);
          var backward = parseInt(tags['lanes:backward'], 10);
          var bothways = parseInt(tags['lanes:both_ways'], 10) > 0 ? 1 : 0;

          if (parseInt(tags.oneway, 10) === -1) {
            forward = 0;
            bothways = 0;
            backward = laneCount;
          } else if (isOneWay) {
            forward = laneCount;
            bothways = 0;
            backward = 0;
          } else if (isNaN(forward) && isNaN(backward)) {
            backward = Math.floor((laneCount - bothways) / 2);
            forward = laneCount - bothways - backward;
          } else if (isNaN(forward)) {
            if (backward > laneCount - bothways) {
              backward = laneCount - bothways;
            }

            forward = laneCount - bothways - backward;
          } else if (isNaN(backward)) {
            if (forward > laneCount - bothways) {
              forward = laneCount - bothways;
            }

            backward = laneCount - bothways - forward;
          }

          return {
            forward: forward,
            backward: backward,
            bothways: bothways
          };
        }

        function parseTurnLanes(tag) {
          if (!tag) return;
          var validValues = ['left', 'slight_left', 'sharp_left', 'through', 'right', 'slight_right', 'sharp_right', 'reverse', 'merge_to_left', 'merge_to_right', 'none'];
          return tag.split('|').map(function (s) {
            if (s === '') s = 'none';
            return s.split(';').map(function (d) {
              return validValues.indexOf(d) === -1 ? 'unknown' : d;
            });
          });
        }

        function parseMaxspeedLanes(tag, maxspeed) {
          if (!tag) return;
          return tag.split('|').map(function (s) {
            if (s === 'none') return s;
            var m = parseInt(s, 10);
            if (s === '' || m === maxspeed) return null;
            return isNaN(m) ? 'unknown' : m;
          });
        }

        function parseMiscLanes(tag) {
          if (!tag) return;
          var validValues = ['yes', 'no', 'designated'];
          return tag.split('|').map(function (s) {
            if (s === '') s = 'no';
            return validValues.indexOf(s) === -1 ? 'unknown' : s;
          });
        }

        function parseBicycleWay(tag) {
          if (!tag) return;
          var validValues = ['yes', 'no', 'designated', 'lane'];
          return tag.split('|').map(function (s) {
            if (s === '') s = 'no';
            return validValues.indexOf(s) === -1 ? 'unknown' : s;
          });
        }

        function mapToLanesObj(lanesObj, data, key) {
          if (data.forward) {
            data.forward.forEach(function (l, i) {
              if (!lanesObj.forward[i]) lanesObj.forward[i] = {};
              lanesObj.forward[i][key] = l;
            });
          }

          if (data.backward) {
            data.backward.forEach(function (l, i) {
              if (!lanesObj.backward[i]) lanesObj.backward[i] = {};
              lanesObj.backward[i][key] = l;
            });
          }

          if (data.unspecified) {
            data.unspecified.forEach(function (l, i) {
              if (!lanesObj.unspecified[i]) lanesObj.unspecified[i] = {};
              lanesObj.unspecified[i][key] = l;
            });
          }
        }

        function osmWay() {
          if (!(this instanceof osmWay)) {
            return new osmWay().initialize(arguments);
          } else if (arguments.length) {
            this.initialize(arguments);
          }
        }
        osmEntity.way = osmWay;
        osmWay.prototype = Object.create(osmEntity.prototype);
        Object.assign(osmWay.prototype, {
          type: 'way',
          nodes: [],
          copy: function copy(resolver, copies) {
            if (copies[this.id]) return copies[this.id];
            var copy = osmEntity.prototype.copy.call(this, resolver, copies);
            var nodes = this.nodes.map(function (id) {
              return resolver.entity(id).copy(resolver, copies).id;
            });
            copy = copy.update({
              nodes: nodes
            });
            copies[this.id] = copy;
            return copy;
          },
          extent: function extent(resolver) {
            return resolver["transient"](this, 'extent', function () {
              var extent = geoExtent();

              for (var i = 0; i < this.nodes.length; i++) {
                var node = resolver.hasEntity(this.nodes[i]);

                if (node) {
                  extent._extend(node.extent());
                }
              }

              return extent;
            });
          },
          first: function first() {
            return this.nodes[0];
          },
          last: function last() {
            return this.nodes[this.nodes.length - 1];
          },
          contains: function contains(node) {
            return this.nodes.indexOf(node) >= 0;
          },
          affix: function affix(node) {
            if (this.nodes[0] === node) return 'prefix';
            if (this.nodes[this.nodes.length - 1] === node) return 'suffix';
          },
          layer: function layer() {
            // explicit layer tag, clamp between -10, 10..
            if (isFinite(this.tags.layer)) {
              return Math.max(-10, Math.min(+this.tags.layer, 10));
            } // implied layer tag..


            if (this.tags.covered === 'yes') return -1;
            if (this.tags.location === 'overground') return 1;
            if (this.tags.location === 'underground') return -1;
            if (this.tags.location === 'underwater') return -10;
            if (this.tags.power === 'line') return 10;
            if (this.tags.power === 'minor_line') return 10;
            if (this.tags.aerialway) return 10;
            if (this.tags.bridge) return 1;
            if (this.tags.cutting) return -1;
            if (this.tags.tunnel) return -1;
            if (this.tags.waterway) return -1;
            if (this.tags.man_made === 'pipeline') return -10;
            if (this.tags.boundary) return -10;
            return 0;
          },
          // the approximate width of the line based on its tags except its `width` tag
          impliedLineWidthMeters: function impliedLineWidthMeters() {
            var averageWidths = {
              highway: {
                // width is for single lane
                motorway: 5,
                motorway_link: 5,
                trunk: 4.5,
                trunk_link: 4.5,
                primary: 4,
                secondary: 4,
                tertiary: 4,
                primary_link: 4,
                secondary_link: 4,
                tertiary_link: 4,
                unclassified: 4,
                road: 4,
                living_street: 4,
                bus_guideway: 4,
                pedestrian: 4,
                residential: 3.5,
                service: 3.5,
                track: 3,
                cycleway: 2.5,
                bridleway: 2,
                corridor: 2,
                steps: 2,
                path: 1.5,
                footway: 1.5
              },
              railway: {
                // width includes ties and rail bed, not just track gauge
                rail: 2.5,
                light_rail: 2.5,
                tram: 2.5,
                subway: 2.5,
                monorail: 2.5,
                funicular: 2.5,
                disused: 2.5,
                preserved: 2.5,
                miniature: 1.5,
                narrow_gauge: 1.5
              },
              waterway: {
                river: 50,
                canal: 25,
                stream: 5,
                tidal_channel: 5,
                fish_pass: 2.5,
                drain: 2.5,
                ditch: 1.5
              }
            };

            for (var key in averageWidths) {
              if (this.tags[key] && averageWidths[key][this.tags[key]]) {
                var width = averageWidths[key][this.tags[key]];

                if (key === 'highway') {
                  var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
                  if (!laneCount) laneCount = this.isOneWay() ? 1 : 2;
                  return width * laneCount;
                }

                return width;
              }
            }

            return null;
          },
          isOneWay: function isOneWay() {
            // explicit oneway tag..
            var values = {
              'yes': true,
              '1': true,
              '-1': true,
              'reversible': true,
              'alternating': true,
              'no': false,
              '0': false
            };

            if (values[this.tags.oneway] !== undefined) {
              return values[this.tags.oneway];
            } // implied oneway tag..


            for (var key in this.tags) {
              if (key in osmOneWayTags && this.tags[key] in osmOneWayTags[key]) {
                return true;
              }
            }

            return false;
          },
          // Some identifier for tag that implies that this way is "sided",
          // i.e. the right side is the 'inside' (e.g. the right side of a
          // natural=cliff is lower).
          sidednessIdentifier: function sidednessIdentifier() {
            for (var key in this.tags) {
              var value = this.tags[key];

              if (key in osmRightSideIsInsideTags && value in osmRightSideIsInsideTags[key]) {
                if (osmRightSideIsInsideTags[key][value] === true) {
                  return key;
                } else {
                  // if the map's value is something other than a
                  // literal true, we should use it so we can
                  // special case some keys (e.g. natural=coastline
                  // is handled differently to other naturals).
                  return osmRightSideIsInsideTags[key][value];
                }
              }
            }

            return null;
          },
          isSided: function isSided() {
            if (this.tags.two_sided === 'yes') {
              return false;
            }

            return this.sidednessIdentifier() !== null;
          },
          lanes: function lanes() {
            return osmLanes(this);
          },
          isClosed: function isClosed() {
            return this.nodes.length > 1 && this.first() === this.last();
          },
          isConvex: function isConvex(resolver) {
            if (!this.isClosed() || this.isDegenerate()) return null;
            var nodes = utilArrayUniq(resolver.childNodes(this));
            var coords = nodes.map(function (n) {
              return n.loc;
            });
            var curr = 0;
            var prev = 0;

            for (var i = 0; i < coords.length; i++) {
              var o = coords[(i + 1) % coords.length];
              var a = coords[i];
              var b = coords[(i + 2) % coords.length];
              var res = geoVecCross(a, b, o);
              curr = res > 0 ? 1 : res < 0 ? -1 : 0;

              if (curr === 0) {
                continue;
              } else if (prev && curr !== prev) {
                return false;
              }

              prev = curr;
            }

            return true;
          },
          // returns an object with the tag that implies this is an area, if any
          tagSuggestingArea: function tagSuggestingArea() {
            return osmTagSuggestingArea(this.tags);
          },
          isArea: function isArea() {
            if (this.tags.area === 'yes') return true;
            if (!this.isClosed() || this.tags.area === 'no') return false;
            return this.tagSuggestingArea() !== null;
          },
          isDegenerate: function isDegenerate() {
            return new Set(this.nodes).size < (this.isArea() ? 3 : 2);
          },
          areAdjacent: function areAdjacent(n1, n2) {
            for (var i = 0; i < this.nodes.length; i++) {
              if (this.nodes[i] === n1) {
                if (this.nodes[i - 1] === n2) return true;
                if (this.nodes[i + 1] === n2) return true;
              }
            }

            return false;
          },
          geometry: function geometry(graph) {
            return graph["transient"](this, 'geometry', function () {
              return this.isArea() ? 'area' : 'line';
            });
          },
          // returns an array of objects representing the segments between the nodes in this way
          segments: function segments(graph) {
            function segmentExtent(graph) {
              var n1 = graph.hasEntity(this.nodes[0]);
              var n2 = graph.hasEntity(this.nodes[1]);
              return n1 && n2 && geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]);
            }

            return graph["transient"](this, 'segments', function () {
              var segments = [];

              for (var i = 0; i < this.nodes.length - 1; i++) {
                segments.push({
                  id: this.id + '-' + i,
                  wayId: this.id,
                  index: i,
                  nodes: [this.nodes[i], this.nodes[i + 1]],
                  extent: segmentExtent
                });
              }

              return segments;
            });
          },
          // If this way is not closed, append the beginning node to the end of the nodelist to close it.
          close: function close() {
            if (this.isClosed() || !this.nodes.length) return this;
            var nodes = this.nodes.slice();
            nodes = nodes.filter(noRepeatNodes);
            nodes.push(nodes[0]);
            return this.update({
              nodes: nodes
            });
          },
          // If this way is closed, remove any connector nodes from the end of the nodelist to unclose it.
          unclose: function unclose() {
            if (!this.isClosed()) return this;
            var nodes = this.nodes.slice();
            var connector = this.first();
            var i = nodes.length - 1; // remove trailing connectors..

            while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
              nodes.splice(i, 1);
              i = nodes.length - 1;
            }

            nodes = nodes.filter(noRepeatNodes);
            return this.update({
              nodes: nodes
            });
          },
          // Adds a node (id) in front of the node which is currently at position index.
          // If index is undefined, the node will be added to the end of the way for linear ways,
          //   or just before the final connecting node for circular ways.
          // Consecutive duplicates are eliminated including existing ones.
          // Circularity is always preserved when adding a node.
          addNode: function addNode(id, index) {
            var nodes = this.nodes.slice();
            var isClosed = this.isClosed();
            var max = isClosed ? nodes.length - 1 : nodes.length;

            if (index === undefined) {
              index = max;
            }

            if (index < 0 || index > max) {
              throw new RangeError('index ' + index + ' out of range 0..' + max);
            } // If this is a closed way, remove all connector nodes except the first one
            // (there may be duplicates) and adjust index if necessary..


            if (isClosed) {
              var connector = this.first(); // leading connectors..

              var i = 1;

              while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
                nodes.splice(i, 1);
                if (index > i) index--;
              } // trailing connectors..


              i = nodes.length - 1;

              while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
                nodes.splice(i, 1);
                if (index > i) index--;
                i = nodes.length - 1;
              }
            }

            nodes.splice(index, 0, id);
            nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..

            if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
              nodes.push(nodes[0]);
            }

            return this.update({
              nodes: nodes
            });
          },
          // Replaces the node which is currently at position index with the given node (id).
          // Consecutive duplicates are eliminated including existing ones.
          // Circularity is preserved when updating a node.
          updateNode: function updateNode(id, index) {
            var nodes = this.nodes.slice();
            var isClosed = this.isClosed();
            var max = nodes.length - 1;

            if (index === undefined || index < 0 || index > max) {
              throw new RangeError('index ' + index + ' out of range 0..' + max);
            } // If this is a closed way, remove all connector nodes except the first one
            // (there may be duplicates) and adjust index if necessary..


            if (isClosed) {
              var connector = this.first(); // leading connectors..

              var i = 1;

              while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
                nodes.splice(i, 1);
                if (index > i) index--;
              } // trailing connectors..


              i = nodes.length - 1;

              while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
                nodes.splice(i, 1);
                if (index === i) index = 0; // update leading connector instead

                i = nodes.length - 1;
              }
            }

            nodes.splice(index, 1, id);
            nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..

            if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
              nodes.push(nodes[0]);
            }

            return this.update({
              nodes: nodes
            });
          },
          // Replaces each occurrence of node id needle with replacement.
          // Consecutive duplicates are eliminated including existing ones.
          // Circularity is preserved.
          replaceNode: function replaceNode(needleID, replacementID) {
            var nodes = this.nodes.slice();
            var isClosed = this.isClosed();

            for (var i = 0; i < nodes.length; i++) {
              if (nodes[i] === needleID) {
                nodes[i] = replacementID;
              }
            }

            nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..

            if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
              nodes.push(nodes[0]);
            }

            return this.update({
              nodes: nodes
            });
          },
          // Removes each occurrence of node id.
          // Consecutive duplicates are eliminated including existing ones.
          // Circularity is preserved.
          removeNode: function removeNode(id) {
            var nodes = this.nodes.slice();
            var isClosed = this.isClosed();
            nodes = nodes.filter(function (node) {
              return node !== id;
            }).filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..

            if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
              nodes.push(nodes[0]);
            }

            return this.update({
              nodes: nodes
            });
          },
          asJXON: function asJXON(changeset_id) {
            var r = {
              way: {
                '@id': this.osmId(),
                '@version': this.version || 0,
                nd: this.nodes.map(function (id) {
                  return {
                    keyAttributes: {
                      ref: osmEntity.id.toOSM(id)
                    }
                  };
                }, this),
                tag: Object.keys(this.tags).map(function (k) {
                  return {
                    keyAttributes: {
                      k: k,
                      v: this.tags[k]
                    }
                  };
                }, this)
              }
            };

            if (changeset_id) {
              r.way['@changeset'] = changeset_id;
            }

            return r;
          },
          asGeoJSON: function asGeoJSON(resolver) {
            return resolver["transient"](this, 'GeoJSON', function () {
              var coordinates = resolver.childNodes(this).map(function (n) {
                return n.loc;
              });

              if (this.isArea() && this.isClosed()) {
                return {
                  type: 'Polygon',
                  coordinates: [coordinates]
                };
              } else {
                return {
                  type: 'LineString',
                  coordinates: coordinates
                };
              }
            });
          },
          area: function area(resolver) {
            return resolver["transient"](this, 'area', function () {
              var nodes = resolver.childNodes(this);
              var json = {
                type: 'Polygon',
                coordinates: [nodes.map(function (n) {
                  return n.loc;
                })]
              };

              if (!this.isClosed() && nodes.length) {
                json.coordinates[0].push(nodes[0].loc);
              }

              var area = d3_geoArea(json); // Heuristic for detecting counterclockwise winding order. Assumes
              // that OpenStreetMap polygons are not hemisphere-spanning.

              if (area > 2 * Math.PI) {
                json.coordinates[0] = json.coordinates[0].reverse();
                area = d3_geoArea(json);
              }

              return isNaN(area) ? 0 : area;
            });
          }
        }); // Filter function to eliminate consecutive duplicates.

        function noRepeatNodes(node, i, arr) {
          return i === 0 || node !== arr[i - 1];
        }

        //
        // 1. Relation tagged with `type=multipolygon` and no interesting tags.
        // 2. One and only one member with the `outer` role. Must be a way with interesting tags.
        // 3. No members without a role.
        //
        // Old multipolygons are no longer recommended but are still rendered as areas by iD.

        function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
          if (entity.type !== 'relation' || !entity.isMultipolygon() || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
            return false;
          }

          var outerMember;

          for (var memberIndex in entity.members) {
            var member = entity.members[memberIndex];

            if (!member.role || member.role === 'outer') {
              if (outerMember) return false;
              if (member.type !== 'way') return false;
              if (!graph.hasEntity(member.id)) return false;
              outerMember = graph.entity(member.id);

              if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
                return false;
              }
            }
          }

          return outerMember;
        } // For fixing up rendering of multipolygons with tags on the outer member.
        // https://github.com/openstreetmap/iD/issues/613

        function osmIsOldMultipolygonOuterMember(entity, graph) {
          if (entity.type !== 'way' || Object.keys(entity.tags).filter(osmIsInterestingTag).length === 0) {
            return false;
          }

          var parents = graph.parentRelations(entity);
          if (parents.length !== 1) return false;
          var parent = parents[0];

          if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
            return false;
          }

          var members = parent.members,
              member;

          for (var i = 0; i < members.length; i++) {
            member = members[i];

            if (member.id === entity.id && member.role && member.role !== 'outer') {
              // Not outer member
              return false;
            }

            if (member.id !== entity.id && (!member.role || member.role === 'outer')) {
              // Not a simple multipolygon
              return false;
            }
          }

          return parent;
        }
        function osmOldMultipolygonOuterMember(entity, graph) {
          if (entity.type !== 'way') return false;
          var parents = graph.parentRelations(entity);
          if (parents.length !== 1) return false;
          var parent = parents[0];

          if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
            return false;
          }

          var members = parent.members,
              member,
              outerMember;

          for (var i = 0; i < members.length; i++) {
            member = members[i];

            if (!member.role || member.role === 'outer') {
              if (outerMember) return false; // Not a simple multipolygon

              outerMember = member;
            }
          }

          if (!outerMember) return false;
          var outerEntity = graph.hasEntity(outerMember.id);

          if (!outerEntity || !Object.keys(outerEntity.tags).filter(osmIsInterestingTag).length) {
            return false;
          }

          return outerEntity;
        } // Join `toJoin` array into sequences of connecting ways.
        // Segments which share identical start/end nodes will, as much as possible,
        // be connected with each other.
        //
        // The return value is a nested array. Each constituent array contains elements
        // of `toJoin` which have been determined to connect.
        //
        // Each consitituent array also has a `nodes` property whose value is an
        // ordered array of member nodes, with appropriate order reversal and
        // start/end coordinate de-duplication.
        //
        // Members of `toJoin` must have, at minimum, `type` and `id` properties.
        // Thus either an array of `osmWay`s or a relation member array may be used.
        //
        // If an member is an `osmWay`, its tags and childnodes may be reversed via
        // `actionReverse` in the output.
        //
        // The returned sequences array also has an `actions` array property, containing
        // any reversal actions that should be applied to the graph, should the calling
        // code attempt to actually join the given ways.
        //
        // Incomplete members (those for which `graph.hasEntity(element.id)` returns
        // false) and non-way members are ignored.
        //

        function osmJoinWays(toJoin, graph) {
          function resolve(member) {
            return graph.childNodes(graph.entity(member.id));
          }

          function reverse(item) {
            var action = actionReverse(item.id, {
              reverseOneway: true
            });
            sequences.actions.push(action);
            return item instanceof osmWay ? action(graph).entity(item.id) : item;
          } // make a copy containing only the items to join


          toJoin = toJoin.filter(function (member) {
            return member.type === 'way' && graph.hasEntity(member.id);
          }); // Are the things we are joining relation members or `osmWays`?
          // If `osmWays`, skip the "prefer a forward path" code below (see #4872)

          var i;
          var joinAsMembers = true;

          for (i = 0; i < toJoin.length; i++) {
            if (toJoin[i] instanceof osmWay) {
              joinAsMembers = false;
              break;
            }
          }

          var sequences = [];
          sequences.actions = [];

          while (toJoin.length) {
            // start a new sequence
            var item = toJoin.shift();
            var currWays = [item];
            var currNodes = resolve(item).slice(); // add to it

            while (toJoin.length) {
              var start = currNodes[0];
              var end = currNodes[currNodes.length - 1];
              var fn = null;
              var nodes = null; // Find the next way/member to join.

              for (i = 0; i < toJoin.length; i++) {
                item = toJoin[i];
                nodes = resolve(item); // (for member ordering only, not way ordering - see #4872)
                // Strongly prefer to generate a forward path that preserves the order
                // of the members array. For multipolygons and most relations, member
                // order does not matter - but for routes, it does. (see #4589)
                // If we started this sequence backwards (i.e. next member way attaches to
                // the start node and not the end node), reverse the initial way before continuing.

                if (joinAsMembers && currWays.length === 1 && nodes[0] !== end && nodes[nodes.length - 1] !== end && (nodes[nodes.length - 1] === start || nodes[0] === start)) {
                  currWays[0] = reverse(currWays[0]);
                  currNodes.reverse();
                  start = currNodes[0];
                  end = currNodes[currNodes.length - 1];
                }

                if (nodes[0] === end) {
                  fn = currNodes.push; // join to end

                  nodes = nodes.slice(1);
                  break;
                } else if (nodes[nodes.length - 1] === end) {
                  fn = currNodes.push; // join to end

                  nodes = nodes.slice(0, -1).reverse();
                  item = reverse(item);
                  break;
                } else if (nodes[nodes.length - 1] === start) {
                  fn = currNodes.unshift; // join to beginning

                  nodes = nodes.slice(0, -1);
                  break;
                } else if (nodes[0] === start) {
                  fn = currNodes.unshift; // join to beginning

                  nodes = nodes.slice(1).reverse();
                  item = reverse(item);
                  break;
                } else {
                  fn = nodes = null;
                }
              }

              if (!nodes) {
                // couldn't find a joinable way/member
                break;
              }

              fn.apply(currWays, [item]);
              fn.apply(currNodes, nodes);
              toJoin.splice(i, 1);
            }

            currWays.nodes = currNodes;
            sequences.push(currWays);
          }

          return sequences;
        }

        function actionAddMember(relationId, member, memberIndex, insertPair) {
          return function action(graph) {
            var relation = graph.entity(relationId); // There are some special rules for Public Transport v2 routes.

            var isPTv2 = /stop|platform/.test(member.role);

            if ((isNaN(memberIndex) || insertPair) && member.type === 'way' && !isPTv2) {
              // Try to perform sensible inserts based on how the ways join together
              graph = addWayMember(relation, graph);
            } else {
              // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
              // Stops and Platforms for PTv2 should be ordered first.
              // hack: We do not currently have the ability to place them in the exactly correct order.
              if (isPTv2 && isNaN(memberIndex)) {
                memberIndex = 0;
              }

              graph = graph.replace(relation.addMember(member, memberIndex));
            }

            return graph;
          }; // Add a way member into the relation "wherever it makes sense".
          // In this situation we were not supplied a memberIndex.

          function addWayMember(relation, graph) {
            var groups, tempWay, item, i, j, k; // remove PTv2 stops and platforms before doing anything.

            var PTv2members = [];
            var members = [];

            for (i = 0; i < relation.members.length; i++) {
              var m = relation.members[i];

              if (/stop|platform/.test(m.role)) {
                PTv2members.push(m);
              } else {
                members.push(m);
              }
            }

            relation = relation.update({
              members: members
            });

            if (insertPair) {
              // We're adding a member that must stay paired with an existing member.
              // (This feature is used by `actionSplit`)
              //
              // This is tricky because the members may exist multiple times in the
              // member list, and with different A-B/B-A ordering and different roles.
              // (e.g. a bus route that loops out and back - #4589).
              //
              // Replace the existing member with a temporary way,
              // so that `osmJoinWays` can treat the pair like a single way.
              tempWay = osmWay({
                id: 'wTemp',
                nodes: insertPair.nodes
              });
              graph = graph.replace(tempWay);
              var tempMember = {
                id: tempWay.id,
                type: 'way',
                role: member.role
              };
              var tempRelation = relation.replaceMember({
                id: insertPair.originalID
              }, tempMember, true);
              groups = utilArrayGroupBy(tempRelation.members, 'type');
              groups.way = groups.way || [];
            } else {
              // Add the member anywhere, one time. Just push and let `osmJoinWays` decide where to put it.
              groups = utilArrayGroupBy(relation.members, 'type');
              groups.way = groups.way || [];
              groups.way.push(member);
            }

            members = withIndex(groups.way);
            var joined = osmJoinWays(members, graph); // `joined` might not contain all of the way members,
            // But will contain only the completed (downloaded) members

            for (i = 0; i < joined.length; i++) {
              var segment = joined[i];
              var nodes = segment.nodes.slice();
              var startIndex = segment[0].index; // j = array index in `members` where this segment starts

              for (j = 0; j < members.length; j++) {
                if (members[j].index === startIndex) {
                  break;
                }
              } // k = each member in segment


              for (k = 0; k < segment.length; k++) {
                item = segment[k];
                var way = graph.entity(item.id); // If this is a paired item, generate members in correct order and role

                if (tempWay && item.id === tempWay.id) {
                  if (nodes[0].id === insertPair.nodes[0]) {
                    item.pair = [{
                      id: insertPair.originalID,
                      type: 'way',
                      role: item.role
                    }, {
                      id: insertPair.insertedID,
                      type: 'way',
                      role: item.role
                    }];
                  } else {
                    item.pair = [{
                      id: insertPair.insertedID,
                      type: 'way',
                      role: item.role
                    }, {
                      id: insertPair.originalID,
                      type: 'way',
                      role: item.role
                    }];
                  }
                } // reorder `members` if necessary


                if (k > 0) {
                  if (j + k >= members.length || item.index !== members[j + k].index) {
                    moveMember(members, item.index, j + k);
                  }
                }

                nodes.splice(0, way.nodes.length - 1);
              }
            }

            if (tempWay) {
              graph = graph.remove(tempWay);
            } // Final pass: skip dead items, split pairs, remove index properties


            var wayMembers = [];

            for (i = 0; i < members.length; i++) {
              item = members[i];
              if (item.index === -1) continue;

              if (item.pair) {
                wayMembers.push(item.pair[0]);
                wayMembers.push(item.pair[1]);
              } else {
                wayMembers.push(utilObjectOmit(item, ['index']));
              }
            } // Put stops and platforms first, then nodes, ways, relations
            // This is recommended for Public Transport v2 routes:
            // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes


            var newMembers = PTv2members.concat(groups.node || [], wayMembers, groups.relation || []);
            return graph.replace(relation.update({
              members: newMembers
            })); // `moveMember()` changes the `members` array in place by splicing
            // the item with `.index = findIndex` to where it belongs,
            // and marking the old position as "dead" with `.index = -1`
            //
            // j=5, k=0                jk
            // segment                 5 4 7 6
            // members       0 1 2 3 4 5 6 7 8 9        keep 5 in j+k
            //
            // j=5, k=1                j k
            // segment                 5 4 7 6
            // members       0 1 2 3 4 5 6 7 8 9        move 4 to j+k
            // members       0 1 2 3 x 5 4 6 7 8 9      moved
            //
            // j=5, k=2                j   k
            // segment                 5 4 7 6
            // members       0 1 2 3 x 5 4 6 7 8 9      move 7 to j+k
            // members       0 1 2 3 x 5 4 7 6 x 8 9    moved
            //
            // j=5, k=3                j     k
            // segment                 5 4 7 6
            // members       0 1 2 3 x 5 4 7 6 x 8 9    keep 6 in j+k
            //

            function moveMember(arr, findIndex, toIndex) {
              var i;

              for (i = 0; i < arr.length; i++) {
                if (arr[i].index === findIndex) {
                  break;
                }
              }

              var item = Object.assign({}, arr[i]); // shallow copy

              arr[i].index = -1; // mark as dead

              item.index = toIndex;
              arr.splice(toIndex, 0, item);
            } // This is the same as `Relation.indexedMembers`,
            // Except we don't want to index all the members, only the ways


            function withIndex(arr) {
              var result = new Array(arr.length);

              for (var i = 0; i < arr.length; i++) {
                result[i] = Object.assign({}, arr[i]); // shallow copy

                result[i].index = i;
              }

              return result;
            }
          }
        }

        function actionAddMidpoint(midpoint, node) {
          return function (graph) {
            graph = graph.replace(node.move(midpoint.loc));
            var parents = utilArrayIntersection(graph.parentWays(graph.entity(midpoint.edge[0])), graph.parentWays(graph.entity(midpoint.edge[1])));
            parents.forEach(function (way) {
              for (var i = 0; i < way.nodes.length - 1; i++) {
                if (geoEdgeEqual([way.nodes[i], way.nodes[i + 1]], midpoint.edge)) {
                  graph = graph.replace(graph.entity(way.id).addNode(node.id, i + 1)); // Add only one midpoint on doubled-back segments,
                  // turning them into self-intersections.

                  return;
                }
              }
            });
            return graph;
          };
        }

        // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/AddNodeToWayAction.as
        function actionAddVertex(wayId, nodeId, index) {
          return function (graph) {
            return graph.replace(graph.entity(wayId).addNode(nodeId, index));
          };
        }

        function actionChangeMember(relationId, member, memberIndex) {
          return function (graph) {
            return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
          };
        }

        function actionChangePreset(entityID, oldPreset, newPreset, skipFieldDefaults) {
          return function action(graph) {
            var entity = graph.entity(entityID);
            var geometry = entity.geometry(graph);
            var tags = entity.tags; // preserve tags that the new preset might care about, if any

            if (oldPreset) tags = oldPreset.unsetTags(tags, geometry, newPreset && newPreset.addTags ? Object.keys(newPreset.addTags) : null);
            if (newPreset) tags = newPreset.setTags(tags, geometry, skipFieldDefaults);
            return graph.replace(entity.update({
              tags: tags
            }));
          };
        }

        function actionChangeTags(entityId, tags) {
          return function (graph) {
            var entity = graph.entity(entityId);
            return graph.replace(entity.update({
              tags: tags
            }));
          };
        }

        function osmNode() {
          if (!(this instanceof osmNode)) {
            return new osmNode().initialize(arguments);
          } else if (arguments.length) {
            this.initialize(arguments);
          }
        }
        osmEntity.node = osmNode;
        osmNode.prototype = Object.create(osmEntity.prototype);
        Object.assign(osmNode.prototype, {
          type: 'node',
          loc: [9999, 9999],
          extent: function extent() {
            return new geoExtent(this.loc);
          },
          geometry: function geometry(graph) {
            return graph["transient"](this, 'geometry', function () {
              return graph.isPoi(this) ? 'point' : 'vertex';
            });
          },
          move: function move(loc) {
            return this.update({
              loc: loc
            });
          },
          isDegenerate: function isDegenerate() {
            return !(Array.isArray(this.loc) && this.loc.length === 2 && this.loc[0] >= -180 && this.loc[0] <= 180 && this.loc[1] >= -90 && this.loc[1] <= 90);
          },
          // Inspect tags and geometry to determine which direction(s) this node/vertex points
          directions: function directions(resolver, projection) {
            var val;
            var i; // which tag to use?

            if (this.isHighwayIntersection(resolver) && (this.tags.stop || '').toLowerCase() === 'all') {
              // all-way stop tag on a highway intersection
              val = 'all';
            } else {
              // generic direction tag
              val = (this.tags.direction || '').toLowerCase(); // better suffix-style direction tag

              var re = /:direction$/i;
              var keys = Object.keys(this.tags);

              for (i = 0; i < keys.length; i++) {
                if (re.test(keys[i])) {
                  val = this.tags[keys[i]].toLowerCase();
                  break;
                }
              }
            }

            if (val === '') return [];
            var cardinal = {
              north: 0,
              n: 0,
              northnortheast: 22,
              nne: 22,
              northeast: 45,
              ne: 45,
              eastnortheast: 67,
              ene: 67,
              east: 90,
              e: 90,
              eastsoutheast: 112,
              ese: 112,
              southeast: 135,
              se: 135,
              southsoutheast: 157,
              sse: 157,
              south: 180,
              s: 180,
              southsouthwest: 202,
              ssw: 202,
              southwest: 225,
              sw: 225,
              westsouthwest: 247,
              wsw: 247,
              west: 270,
              w: 270,
              westnorthwest: 292,
              wnw: 292,
              northwest: 315,
              nw: 315,
              northnorthwest: 337,
              nnw: 337
            };
            var values = val.split(';');
            var results = [];
            values.forEach(function (v) {
              // swap cardinal for numeric directions
              if (cardinal[v] !== undefined) {
                v = cardinal[v];
              } // numeric direction - just add to results


              if (v !== '' && !isNaN(+v)) {
                results.push(+v);
                return;
              } // string direction - inspect parent ways


              var lookBackward = this.tags['traffic_sign:backward'] || v === 'backward' || v === 'both' || v === 'all';
              var lookForward = this.tags['traffic_sign:forward'] || v === 'forward' || v === 'both' || v === 'all';
              if (!lookForward && !lookBackward) return;
              var nodeIds = {};
              resolver.parentWays(this).forEach(function (parent) {
                var nodes = parent.nodes;

                for (i = 0; i < nodes.length; i++) {
                  if (nodes[i] === this.id) {
                    // match current entity
                    if (lookForward && i > 0) {
                      nodeIds[nodes[i - 1]] = true; // look back to prev node
                    }

                    if (lookBackward && i < nodes.length - 1) {
                      nodeIds[nodes[i + 1]] = true; // look ahead to next node
                    }
                  }
                }
              }, this);
              Object.keys(nodeIds).forEach(function (nodeId) {
                // +90 because geoAngle returns angle from X axis, not Y (north)
                results.push(geoAngle(this, resolver.entity(nodeId), projection) * (180 / Math.PI) + 90);
              }, this);
            }, this);
            return utilArrayUniq(results);
          },
          isCrossing: function isCrossing() {
            return this.tags.highway === 'crossing' || this.tags.railway && this.tags.railway.indexOf('crossing') !== -1;
          },
          isEndpoint: function isEndpoint(resolver) {
            return resolver["transient"](this, 'isEndpoint', function () {
              var id = this.id;
              return resolver.parentWays(this).filter(function (parent) {
                return !parent.isClosed() && !!parent.affix(id);
              }).length > 0;
            });
          },
          isConnected: function isConnected(resolver) {
            return resolver["transient"](this, 'isConnected', function () {
              var parents = resolver.parentWays(this);

              if (parents.length > 1) {
                // vertex is connected to multiple parent ways
                for (var i in parents) {
                  if (parents[i].geometry(resolver) === 'line' && parents[i].hasInterestingTags()) return true;
                }
              } else if (parents.length === 1) {
                var way = parents[0];
                var nodes = way.nodes.slice();

                if (way.isClosed()) {
                  nodes.pop();
                } // ignore connecting node if closed
                // return true if vertex appears multiple times (way is self intersecting)


                return nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
              }

              return false;
            });
          },
          parentIntersectionWays: function parentIntersectionWays(resolver) {
            return resolver["transient"](this, 'parentIntersectionWays', function () {
              return resolver.parentWays(this).filter(function (parent) {
                return (parent.tags.highway || parent.tags.waterway || parent.tags.railway || parent.tags.aeroway) && parent.geometry(resolver) === 'line';
              });
            });
          },
          isIntersection: function isIntersection(resolver) {
            return this.parentIntersectionWays(resolver).length > 1;
          },
          isHighwayIntersection: function isHighwayIntersection(resolver) {
            return resolver["transient"](this, 'isHighwayIntersection', function () {
              return resolver.parentWays(this).filter(function (parent) {
                return parent.tags.highway && parent.geometry(resolver) === 'line';
              }).length > 1;
            });
          },
          isOnAddressLine: function isOnAddressLine(resolver) {
            return resolver["transient"](this, 'isOnAddressLine', function () {
              return resolver.parentWays(this).filter(function (parent) {
                return parent.tags.hasOwnProperty('addr:interpolation') && parent.geometry(resolver) === 'line';
              }).length > 0;
            });
          },
          asJXON: function asJXON(changeset_id) {
            var r = {
              node: {
                '@id': this.osmId(),
                '@lon': this.loc[0],
                '@lat': this.loc[1],
                '@version': this.version || 0,
                tag: Object.keys(this.tags).map(function (k) {
                  return {
                    keyAttributes: {
                      k: k,
                      v: this.tags[k]
                    }
                  };
                }, this)
              }
            };
            if (changeset_id) r.node['@changeset'] = changeset_id;
            return r;
          },
          asGeoJSON: function asGeoJSON() {
            return {
              type: 'Point',
              coordinates: this.loc
            };
          }
        });

        function actionCircularize(wayId, projection, maxAngle) {
          maxAngle = (maxAngle || 20) * Math.PI / 180;

          var action = function action(graph, t) {
            if (t === null || !isFinite(t)) t = 1;
            t = Math.min(Math.max(+t, 0), 1);
            var way = graph.entity(wayId);
            var origNodes = {};
            graph.childNodes(way).forEach(function (node) {
              if (!origNodes[node.id]) origNodes[node.id] = node;
            });

            if (!way.isConvex(graph)) {
              graph = action.makeConvex(graph);
            }

            var nodes = utilArrayUniq(graph.childNodes(way));
            var keyNodes = nodes.filter(function (n) {
              return graph.parentWays(n).length !== 1;
            });
            var points = nodes.map(function (n) {
              return projection(n.loc);
            });
            var keyPoints = keyNodes.map(function (n) {
              return projection(n.loc);
            });
            var centroid = points.length === 2 ? geoVecInterp(points[0], points[1], 0.5) : d3_polygonCentroid(points);
            var radius = d3_median(points, function (p) {
              return geoVecLength(centroid, p);
            });
            var sign = d3_polygonArea(points) > 0 ? 1 : -1;
            var ids, i, j, k; // we need at least two key nodes for the algorithm to work

            if (!keyNodes.length) {
              keyNodes = [nodes[0]];
              keyPoints = [points[0]];
            }

            if (keyNodes.length === 1) {
              var index = nodes.indexOf(keyNodes[0]);
              var oppositeIndex = Math.floor((index + nodes.length / 2) % nodes.length);
              keyNodes.push(nodes[oppositeIndex]);
              keyPoints.push(points[oppositeIndex]);
            } // key points and nodes are those connected to the ways,
            // they are projected onto the circle, in between nodes are moved
            // to constant intervals between key nodes, extra in between nodes are
            // added if necessary.


            for (i = 0; i < keyPoints.length; i++) {
              var nextKeyNodeIndex = (i + 1) % keyNodes.length;
              var startNode = keyNodes[i];
              var endNode = keyNodes[nextKeyNodeIndex];
              var startNodeIndex = nodes.indexOf(startNode);
              var endNodeIndex = nodes.indexOf(endNode);
              var numberNewPoints = -1;
              var indexRange = endNodeIndex - startNodeIndex;
              var nearNodes = {};
              var inBetweenNodes = [];
              var startAngle, endAngle, totalAngle, eachAngle;
              var angle, loc, node, origNode;

              if (indexRange < 0) {
                indexRange += nodes.length;
              } // position this key node


              var distance = geoVecLength(centroid, keyPoints[i]) || 1e-4;
              keyPoints[i] = [centroid[0] + (keyPoints[i][0] - centroid[0]) / distance * radius, centroid[1] + (keyPoints[i][1] - centroid[1]) / distance * radius];
              loc = projection.invert(keyPoints[i]);
              node = keyNodes[i];
              origNode = origNodes[node.id];
              node = node.move(geoVecInterp(origNode.loc, loc, t));
              graph = graph.replace(node); // figure out the between delta angle we want to match to

              startAngle = Math.atan2(keyPoints[i][1] - centroid[1], keyPoints[i][0] - centroid[0]);
              endAngle = Math.atan2(keyPoints[nextKeyNodeIndex][1] - centroid[1], keyPoints[nextKeyNodeIndex][0] - centroid[0]);
              totalAngle = endAngle - startAngle; // detects looping around -pi/pi

              if (totalAngle * sign > 0) {
                totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
              }

              do {
                numberNewPoints++;
                eachAngle = totalAngle / (indexRange + numberNewPoints);
              } while (Math.abs(eachAngle) > maxAngle); // move existing nodes


              for (j = 1; j < indexRange; j++) {
                angle = startAngle + j * eachAngle;
                loc = projection.invert([centroid[0] + Math.cos(angle) * radius, centroid[1] + Math.sin(angle) * radius]);
                node = nodes[(j + startNodeIndex) % nodes.length];
                origNode = origNodes[node.id];
                nearNodes[node.id] = angle;
                node = node.move(geoVecInterp(origNode.loc, loc, t));
                graph = graph.replace(node);
              } // add new in between nodes if necessary


              for (j = 0; j < numberNewPoints; j++) {
                angle = startAngle + (indexRange + j) * eachAngle;
                loc = projection.invert([centroid[0] + Math.cos(angle) * radius, centroid[1] + Math.sin(angle) * radius]); // choose a nearnode to use as the original

                var min = Infinity;

                for (var nodeId in nearNodes) {
                  var nearAngle = nearNodes[nodeId];
                  var dist = Math.abs(nearAngle - angle);

                  if (dist < min) {
                    min = dist;
                    origNode = origNodes[nodeId];
                  }
                }

                node = osmNode({
                  loc: geoVecInterp(origNode.loc, loc, t)
                });
                graph = graph.replace(node);
                nodes.splice(endNodeIndex + j, 0, node);
                inBetweenNodes.push(node.id);
              } // Check for other ways that share these keyNodes..
              // If keyNodes are adjacent in both ways,
              // we can add inBetweenNodes to that shared way too..


              if (indexRange === 1 && inBetweenNodes.length) {
                var startIndex1 = way.nodes.lastIndexOf(startNode.id);
                var endIndex1 = way.nodes.lastIndexOf(endNode.id);
                var wayDirection1 = endIndex1 - startIndex1;

                if (wayDirection1 < -1) {
                  wayDirection1 = 1;
                }

                var parentWays = graph.parentWays(keyNodes[i]);

                for (j = 0; j < parentWays.length; j++) {
                  var sharedWay = parentWays[j];
                  if (sharedWay === way) continue;

                  if (sharedWay.areAdjacent(startNode.id, endNode.id)) {
                    var startIndex2 = sharedWay.nodes.lastIndexOf(startNode.id);
                    var endIndex2 = sharedWay.nodes.lastIndexOf(endNode.id);
                    var wayDirection2 = endIndex2 - startIndex2;
                    var insertAt = endIndex2;

                    if (wayDirection2 < -1) {
                      wayDirection2 = 1;
                    }

                    if (wayDirection1 !== wayDirection2) {
                      inBetweenNodes.reverse();
                      insertAt = startIndex2;
                    }

                    for (k = 0; k < inBetweenNodes.length; k++) {
                      sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
                    }

                    graph = graph.replace(sharedWay);
                  }
                }
              }
            } // update the way to have all the new nodes


            ids = nodes.map(function (n) {
              return n.id;
            });
            ids.push(ids[0]);
            way = way.update({
              nodes: ids
            });
            graph = graph.replace(way);
            return graph;
          };

          action.makeConvex = function (graph) {
            var way = graph.entity(wayId);
            var nodes = utilArrayUniq(graph.childNodes(way));
            var points = nodes.map(function (n) {
              return projection(n.loc);
            });
            var sign = d3_polygonArea(points) > 0 ? 1 : -1;
            var hull = d3_polygonHull(points);
            var i, j; // D3 convex hulls go counterclockwise..

            if (sign === -1) {
              nodes.reverse();
              points.reverse();
            }

            for (i = 0; i < hull.length - 1; i++) {
              var startIndex = points.indexOf(hull[i]);
              var endIndex = points.indexOf(hull[i + 1]);
              var indexRange = endIndex - startIndex;

              if (indexRange < 0) {
                indexRange += nodes.length;
              } // move interior nodes to the surface of the convex hull..


              for (j = 1; j < indexRange; j++) {
                var point = geoVecInterp(hull[i], hull[i + 1], j / indexRange);
                var node = nodes[(j + startIndex) % nodes.length].move(projection.invert(point));
                graph = graph.replace(node);
              }
            }

            return graph;
          };

          action.disabled = function (graph) {
            if (!graph.entity(wayId).isClosed()) {
              return 'not_closed';
            } //disable when already circular


            var way = graph.entity(wayId);
            var nodes = utilArrayUniq(graph.childNodes(way));
            var points = nodes.map(function (n) {
              return projection(n.loc);
            });
            var hull = d3_polygonHull(points);
            var epsilonAngle = Math.PI / 180;

            if (hull.length !== points.length || hull.length < 3) {
              return false;
            }

            var centroid = d3_polygonCentroid(points);
            var radius = geoVecLengthSquare(centroid, points[0]);
            var i, actualPoint; // compare distances between centroid and points

            for (i = 0; i < hull.length; i++) {
              actualPoint = hull[i];
              var actualDist = geoVecLengthSquare(actualPoint, centroid);
              var diff = Math.abs(actualDist - radius); //compare distances with epsilon-error (5%)

              if (diff > 0.05 * radius) {
                return false;
              }
            } //check if central angles are smaller than maxAngle


            for (i = 0; i < hull.length; i++) {
              actualPoint = hull[i];
              var nextPoint = hull[(i + 1) % hull.length];
              var startAngle = Math.atan2(actualPoint[1] - centroid[1], actualPoint[0] - centroid[0]);
              var endAngle = Math.atan2(nextPoint[1] - centroid[1], nextPoint[0] - centroid[0]);
              var angle = endAngle - startAngle;

              if (angle < 0) {
                angle = -angle;
              }

              if (angle > Math.PI) {
                angle = 2 * Math.PI - angle;
              }

              if (angle > maxAngle + epsilonAngle) {
                return false;
              }
            }

            return 'already_circular';
          };

          action.transitionable = true;
          return action;
        }

        function actionDeleteWay(wayID) {
          function canDeleteNode(node, graph) {
            // don't delete nodes still attached to ways or relations
            if (graph.parentWays(node).length || graph.parentRelations(node).length) return false;
            var geometries = osmNodeGeometriesForTags(node.tags); // don't delete if this node can be a standalone point

            if (geometries.point) return false; // delete if this node only be a vertex

            if (geometries.vertex) return true; // iD doesn't know if this should be a point or vertex,
            // so only delete if there are no interesting tags

            return !node.hasInterestingTags();
          }

          var action = function action(graph) {
            var way = graph.entity(wayID);
            graph.parentRelations(way).forEach(function (parent) {
              parent = parent.removeMembersWithID(wayID);
              graph = graph.replace(parent);

              if (parent.isDegenerate()) {
                graph = actionDeleteRelation(parent.id)(graph);
              }
            });
            new Set(way.nodes).forEach(function (nodeID) {
              graph = graph.replace(way.removeNode(nodeID));
              var node = graph.entity(nodeID);

              if (canDeleteNode(node, graph)) {
                graph = graph.remove(node);
              }
            });
            return graph.remove(way);
          };

          return action;
        }

        function actionDeleteMultiple(ids) {
          var actions = {
            way: actionDeleteWay,
            node: actionDeleteNode,
            relation: actionDeleteRelation
          };

          var action = function action(graph) {
            ids.forEach(function (id) {
              if (graph.hasEntity(id)) {
                // It may have been deleted already.
                graph = actions[graph.entity(id).type](id)(graph);
              }
            });
            return graph;
          };

          return action;
        }

        function actionDeleteRelation(relationID, allowUntaggedMembers) {
          function canDeleteEntity(entity, graph) {
            return !graph.parentWays(entity).length && !graph.parentRelations(entity).length && !entity.hasInterestingTags() && !allowUntaggedMembers;
          }

          var action = function action(graph) {
            var relation = graph.entity(relationID);
            graph.parentRelations(relation).forEach(function (parent) {
              parent = parent.removeMembersWithID(relationID);
              graph = graph.replace(parent);

              if (parent.isDegenerate()) {
                graph = actionDeleteRelation(parent.id)(graph);
              }
            });
            var memberIDs = utilArrayUniq(relation.members.map(function (m) {
              return m.id;
            }));
            memberIDs.forEach(function (memberID) {
              graph = graph.replace(relation.removeMembersWithID(memberID));
              var entity = graph.entity(memberID);

              if (canDeleteEntity(entity, graph)) {
                graph = actionDeleteMultiple([memberID])(graph);
              }
            });
            return graph.remove(relation);
          };

          return action;
        }

        function actionDeleteNode(nodeId) {
          var action = function action(graph) {
            var node = graph.entity(nodeId);
            graph.parentWays(node).forEach(function (parent) {
              parent = parent.removeNode(nodeId);
              graph = graph.replace(parent);

              if (parent.isDegenerate()) {
                graph = actionDeleteWay(parent.id)(graph);
              }
            });
            graph.parentRelations(node).forEach(function (parent) {
              parent = parent.removeMembersWithID(nodeId);
              graph = graph.replace(parent);

              if (parent.isDegenerate()) {
                graph = actionDeleteRelation(parent.id)(graph);
              }
            });
            return graph.remove(node);
          };

          return action;
        }

        //
        // First choose a node to be the survivor, with preference given
        // to an existing (not new) node.
        //
        // Tags and relation memberships of of non-surviving nodes are merged
        // to the survivor.
        //
        // This is the inverse of `iD.actionDisconnect`.
        //
        // Reference:
        //   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeNodesAction.as
        //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/MergeNodesAction.java
        //

        function actionConnect(nodeIDs) {
          var action = function action(graph) {
            var survivor;
            var node;
            var parents;
            var i, j; // Choose a survivor node, prefer an existing (not new) node - #4974

            for (i = 0; i < nodeIDs.length; i++) {
              survivor = graph.entity(nodeIDs[i]);
              if (survivor.version) break; // found one
            } // Replace all non-surviving nodes with the survivor and merge tags.


            for (i = 0; i < nodeIDs.length; i++) {
              node = graph.entity(nodeIDs[i]);
              if (node.id === survivor.id) continue;
              parents = graph.parentWays(node);

              for (j = 0; j < parents.length; j++) {
                graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
              }

              parents = graph.parentRelations(node);

              for (j = 0; j < parents.length; j++) {
                graph = graph.replace(parents[j].replaceMember(node, survivor));
              }

              survivor = survivor.mergeTags(node.tags);
              graph = actionDeleteNode(node.id)(graph);
            }

            graph = graph.replace(survivor); // find and delete any degenerate ways created by connecting adjacent vertices

            parents = graph.parentWays(survivor);

            for (i = 0; i < parents.length; i++) {
              if (parents[i].isDegenerate()) {
                graph = actionDeleteWay(parents[i].id)(graph);
              }
            }

            return graph;
          };

          action.disabled = function (graph) {
            var seen = {};
            var restrictionIDs = [];
            var survivor;
            var node, way;
            var relations, relation, role;
            var i, j, k; // Choose a survivor node, prefer an existing (not new) node - #4974

            for (i = 0; i < nodeIDs.length; i++) {
              survivor = graph.entity(nodeIDs[i]);
              if (survivor.version) break; // found one
            } // 1. disable if the nodes being connected have conflicting relation roles


            for (i = 0; i < nodeIDs.length; i++) {
              node = graph.entity(nodeIDs[i]);
              relations = graph.parentRelations(node);

              for (j = 0; j < relations.length; j++) {
                relation = relations[j];
                role = relation.memberById(node.id).role || ''; // if this node is a via node in a restriction, remember for later

                if (relation.hasFromViaTo()) {
                  restrictionIDs.push(relation.id);
                }

                if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
                  return 'relation';
                } else {
                  seen[relation.id] = role;
                }
              }
            } // gather restrictions for parent ways


            for (i = 0; i < nodeIDs.length; i++) {
              node = graph.entity(nodeIDs[i]);
              var parents = graph.parentWays(node);

              for (j = 0; j < parents.length; j++) {
                var parent = parents[j];
                relations = graph.parentRelations(parent);

                for (k = 0; k < relations.length; k++) {
                  relation = relations[k];

                  if (relation.hasFromViaTo()) {
                    restrictionIDs.push(relation.id);
                  }
                }
              }
            } // test restrictions


            restrictionIDs = utilArrayUniq(restrictionIDs);

            for (i = 0; i < restrictionIDs.length; i++) {
              relation = graph.entity(restrictionIDs[i]);
              if (!relation.isComplete(graph)) continue;
              var memberWays = relation.members.filter(function (m) {
                return m.type === 'way';
              }).map(function (m) {
                return graph.entity(m.id);
              });
              memberWays = utilArrayUniq(memberWays);
              var f = relation.memberByRole('from');
              var t = relation.memberByRole('to');
              var isUturn = f.id === t.id; // 2a. disable if connection would damage a restriction
              // (a key node is a node at the junction of ways)

              var nodes = {
                from: [],
                via: [],
                to: [],
                keyfrom: [],
                keyto: []
              };

              for (j = 0; j < relation.members.length; j++) {
                collectNodes(relation.members[j], nodes);
              }

              nodes.keyfrom = utilArrayUniq(nodes.keyfrom.filter(hasDuplicates));
              nodes.keyto = utilArrayUniq(nodes.keyto.filter(hasDuplicates));
              var filter = keyNodeFilter(nodes.keyfrom, nodes.keyto);
              nodes.from = nodes.from.filter(filter);
              nodes.via = nodes.via.filter(filter);
              nodes.to = nodes.to.filter(filter);
              var connectFrom = false;
              var connectVia = false;
              var connectTo = false;
              var connectKeyFrom = false;
              var connectKeyTo = false;

              for (j = 0; j < nodeIDs.length; j++) {
                var n = nodeIDs[j];

                if (nodes.from.indexOf(n) !== -1) {
                  connectFrom = true;
                }

                if (nodes.via.indexOf(n) !== -1) {
                  connectVia = true;
                }

                if (nodes.to.indexOf(n) !== -1) {
                  connectTo = true;
                }

                if (nodes.keyfrom.indexOf(n) !== -1) {
                  connectKeyFrom = true;
                }

                if (nodes.keyto.indexOf(n) !== -1) {
                  connectKeyTo = true;
                }
              }

              if (connectFrom && connectTo && !isUturn) {
                return 'restriction';
              }

              if (connectFrom && connectVia) {
                return 'restriction';
              }

              if (connectTo && connectVia) {
                return 'restriction';
              } // connecting to a key node -
              // if both nodes are on a member way (i.e. part of the turn restriction),
              // the connecting node must be adjacent to the key node.


              if (connectKeyFrom || connectKeyTo) {
                if (nodeIDs.length !== 2) {
                  return 'restriction';
                }

                var n0 = null;
                var n1 = null;

                for (j = 0; j < memberWays.length; j++) {
                  way = memberWays[j];

                  if (way.contains(nodeIDs[0])) {
                    n0 = nodeIDs[0];
                  }

                  if (way.contains(nodeIDs[1])) {
                    n1 = nodeIDs[1];
                  }
                }

                if (n0 && n1) {
                  // both nodes are part of the restriction
                  var ok = false;

                  for (j = 0; j < memberWays.length; j++) {
                    way = memberWays[j];

                    if (way.areAdjacent(n0, n1)) {
                      ok = true;
                      break;
                    }
                  }

                  if (!ok) {
                    return 'restriction';
                  }
                }
              } // 2b. disable if nodes being connected will destroy a member way in a restriction
              // (to test, make a copy and try actually connecting the nodes)


              for (j = 0; j < memberWays.length; j++) {
                way = memberWays[j].update({}); // make copy

                for (k = 0; k < nodeIDs.length; k++) {
                  if (nodeIDs[k] === survivor.id) continue;

                  if (way.areAdjacent(nodeIDs[k], survivor.id)) {
                    way = way.removeNode(nodeIDs[k]);
                  } else {
                    way = way.replaceNode(nodeIDs[k], survivor.id);
                  }
                }

                if (way.isDegenerate()) {
                  return 'restriction';
                }
              }
            }

            return false; // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction

            function hasDuplicates(n, i, arr) {
              return arr.indexOf(n) !== arr.lastIndexOf(n);
            }

            function keyNodeFilter(froms, tos) {
              return function (n) {
                return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
              };
            }

            function collectNodes(member, collection) {
              var entity = graph.hasEntity(member.id);
              if (!entity) return;
              var role = member.role || '';

              if (!collection[role]) {
                collection[role] = [];
              }

              if (member.type === 'node') {
                collection[role].push(member.id);

                if (role === 'via') {
                  collection.keyfrom.push(member.id);
                  collection.keyto.push(member.id);
                }
              } else if (member.type === 'way') {
                collection[role].push.apply(collection[role], entity.nodes);

                if (role === 'from' || role === 'via') {
                  collection.keyfrom.push(entity.first());
                  collection.keyfrom.push(entity.last());
                }

                if (role === 'to' || role === 'via') {
                  collection.keyto.push(entity.first());
                  collection.keyto.push(entity.last());
                }
              }
            }
          };

          return action;
        }

        function actionCopyEntities(ids, fromGraph) {
          var _copies = {};

          var action = function action(graph) {
            ids.forEach(function (id) {
              fromGraph.entity(id).copy(fromGraph, _copies);
            });

            for (var id in _copies) {
              graph = graph.replace(_copies[id]);
            }

            return graph;
          };

          action.copies = function () {
            return _copies;
          };

          return action;
        }

        function actionDeleteMember(relationId, memberIndex) {
          return function (graph) {
            var relation = graph.entity(relationId).removeMember(memberIndex);
            graph = graph.replace(relation);

            if (relation.isDegenerate()) {
              graph = actionDeleteRelation(relation.id)(graph);
            }

            return graph;
          };
        }

        function actionDiscardTags(difference, discardTags) {
          discardTags = discardTags || {};
          return function (graph) {
            difference.modified().forEach(checkTags);
            difference.created().forEach(checkTags);
            return graph;

            function checkTags(entity) {
              var keys = Object.keys(entity.tags);
              var didDiscard = false;
              var tags = {};

              for (var i = 0; i < keys.length; i++) {
                var k = keys[i];

                if (discardTags[k] || !entity.tags[k]) {
                  didDiscard = true;
                } else {
                  tags[k] = entity.tags[k];
                }
              }

              if (didDiscard) {
                graph = graph.replace(entity.update({
                  tags: tags
                }));
              }
            }
          };
        }

        //
        // Optionally, disconnect only the given ways.
        //
        // For testing convenience, accepts an ID to assign to the (first) new node.
        // Normally, this will be undefined and the way will automatically
        // be assigned a new ID.
        //
        // This is the inverse of `iD.actionConnect`.
        //
        // Reference:
        //   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/UnjoinNodeAction.as
        //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/UnGlueAction.java
        //

        function actionDisconnect(nodeId, newNodeId) {
          var wayIds;

          var action = function action(graph) {
            var node = graph.entity(nodeId);
            var connections = action.connections(graph);
            connections.forEach(function (connection) {
              var way = graph.entity(connection.wayID);
              var newNode = osmNode({
                id: newNodeId,
                loc: node.loc,
                tags: node.tags
              });
              graph = graph.replace(newNode);

              if (connection.index === 0 && way.isArea()) {
                // replace shared node with shared node..
                graph = graph.replace(way.replaceNode(way.nodes[0], newNode.id));
              } else if (way.isClosed() && connection.index === way.nodes.length - 1) {
                // replace closing node with new new node..
                graph = graph.replace(way.unclose().addNode(newNode.id));
              } else {
                // replace shared node with multiple new nodes..
                graph = graph.replace(way.updateNode(newNode.id, connection.index));
              }
            });
            return graph;
          };

          action.connections = function (graph) {
            var candidates = [];
            var keeping = false;
            var parentWays = graph.parentWays(graph.entity(nodeId));
            var way, waynode;

            for (var i = 0; i < parentWays.length; i++) {
              way = parentWays[i];

              if (wayIds && wayIds.indexOf(way.id) === -1) {
                keeping = true;
                continue;
              }

              if (way.isArea() && way.nodes[0] === nodeId) {
                candidates.push({
                  wayID: way.id,
                  index: 0
                });
              } else {
                for (var j = 0; j < way.nodes.length; j++) {
                  waynode = way.nodes[j];

                  if (waynode === nodeId) {
                    if (way.isClosed() && parentWays.length > 1 && wayIds && wayIds.indexOf(way.id) !== -1 && j === way.nodes.length - 1) {
                      continue;
                    }

                    candidates.push({
                      wayID: way.id,
                      index: j
                    });
                  }
                }
              }
            }

            return keeping ? candidates : candidates.slice(1);
          };

          action.disabled = function (graph) {
            var connections = action.connections(graph);
            if (connections.length === 0) return 'not_connected';
            var parentWays = graph.parentWays(graph.entity(nodeId));
            var seenRelationIds = {};
            var sharedRelation;
            parentWays.forEach(function (way) {
              var relations = graph.parentRelations(way);
              relations.forEach(function (relation) {
                if (relation.id in seenRelationIds) {
                  if (wayIds) {
                    if (wayIds.indexOf(way.id) !== -1 || wayIds.indexOf(seenRelationIds[relation.id]) !== -1) {
                      sharedRelation = relation;
                    }
                  } else {
                    sharedRelation = relation;
                  }
                } else {
                  seenRelationIds[relation.id] = way.id;
                }
              });
            });
            if (sharedRelation) return 'relation';
          };

          action.limitWays = function (val) {
            if (!arguments.length) return wayIds;
            wayIds = val;
            return action;
          };

          return action;
        }

        function actionExtract(entityID, projection) {
          var extractedNodeID;

          var action = function action(graph) {
            var entity = graph.entity(entityID);

            if (entity.type === 'node') {
              return extractFromNode(entity, graph);
            }

            return extractFromWayOrRelation(entity, graph);
          };

          function extractFromNode(node, graph) {
            extractedNodeID = node.id; // Create a new node to replace the one we will detach

            var replacement = osmNode({
              loc: node.loc
            });
            graph = graph.replace(replacement); // Process each way in turn, updating the graph as we go

            graph = graph.parentWays(node).reduce(function (accGraph, parentWay) {
              return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
            }, graph); // Process any relations too

            return graph.parentRelations(node).reduce(function (accGraph, parentRel) {
              return accGraph.replace(parentRel.replaceMember(node, replacement));
            }, graph);
          }

          function extractFromWayOrRelation(entity, graph) {
            var fromGeometry = entity.geometry(graph);
            var keysToCopyAndRetain = ['source', 'wheelchair'];
            var keysToRetain = ['area'];
            var buildingKeysToRetain = ['architect', 'building', 'height', 'layer'];
            var extractedLoc = d3_geoPath(projection).centroid(entity.asGeoJSON(graph));
            extractedLoc = extractedLoc && projection.invert(extractedLoc);

            if (!extractedLoc || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
              extractedLoc = entity.extent(graph).center();
            }

            var indoorAreaValues = {
              area: true,
              corridor: true,
              elevator: true,
              level: true,
              room: true
            };
            var isBuilding = entity.tags.building && entity.tags.building !== 'no' || entity.tags['building:part'] && entity.tags['building:part'] !== 'no';
            var isIndoorArea = fromGeometry === 'area' && entity.tags.indoor && indoorAreaValues[entity.tags.indoor];
            var entityTags = Object.assign({}, entity.tags); // shallow copy

            var pointTags = {};

            for (var key in entityTags) {
              if (entity.type === 'relation' && key === 'type') {
                continue;
              }

              if (keysToRetain.indexOf(key) !== -1) {
                continue;
              }

              if (isBuilding) {
                // don't transfer building-related tags
                if (buildingKeysToRetain.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
              } // leave `indoor` tag on the area


              if (isIndoorArea && key === 'indoor') {
                continue;
              } // copy the tag from the entity to the point


              pointTags[key] = entityTags[key]; // leave addresses and some other tags so they're on both features

              if (keysToCopyAndRetain.indexOf(key) !== -1 || key.match(/^addr:.{1,}/)) {
                continue;
              } else if (isIndoorArea && key === 'level') {
                // leave `level` on both features
                continue;
              } // remove the tag from the entity


              delete entityTags[key];
            }

            if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
              // ensure that areas keep area geometry
              entityTags.area = 'yes';
            }

            var replacement = osmNode({
              loc: extractedLoc,
              tags: pointTags
            });
            graph = graph.replace(replacement);
            extractedNodeID = replacement.id;
            return graph.replace(entity.update({
              tags: entityTags
            }));
          }

          action.getExtractedNodeID = function () {
            return extractedNodeID;
          };

          return action;
        }

        //
        // This is the inverse of `iD.actionSplit`.
        //
        // Reference:
        //   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeWaysAction.as
        //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/CombineWayAction.java
        //

        function actionJoin(ids) {
          function groupEntitiesByGeometry(graph) {
            var entities = ids.map(function (id) {
              return graph.entity(id);
            });
            return Object.assign({
              line: []
            }, utilArrayGroupBy(entities, function (entity) {
              return entity.geometry(graph);
            }));
          }

          var action = function action(graph) {
            var ways = ids.map(graph.entity, graph);
            var survivorID = ways[0].id; // if any of the ways are sided (e.g. coastline, cliff, kerb)
            // sort them first so they establish the overall order - #6033

            ways.sort(function (a, b) {
              var aSided = a.isSided();
              var bSided = b.isSided();
              return aSided && !bSided ? -1 : bSided && !aSided ? 1 : 0;
            }); // Prefer to keep an existing way.

            for (var i = 0; i < ways.length; i++) {
              if (!ways[i].isNew()) {
                survivorID = ways[i].id;
                break;
              }
            }

            var sequences = osmJoinWays(ways, graph);
            var joined = sequences[0]; // We might need to reverse some of these ways before joining them.  #4688
            // `joined.actions` property will contain any actions we need to apply.

            graph = sequences.actions.reduce(function (g, action) {
              return action(g);
            }, graph);
            var survivor = graph.entity(survivorID);
            survivor = survivor.update({
              nodes: joined.nodes.map(function (n) {
                return n.id;
              })
            });
            graph = graph.replace(survivor);
            joined.forEach(function (way) {
              if (way.id === survivorID) return;
              graph.parentRelations(way).forEach(function (parent) {
                graph = graph.replace(parent.replaceMember(way, survivor));
              });
              survivor = survivor.mergeTags(way.tags);
              graph = graph.replace(survivor);
              graph = actionDeleteWay(way.id)(graph);
            }); // Finds if the join created a single-member multipolygon,
            // and if so turns it into a basic area instead

            function checkForSimpleMultipolygon() {
              if (!survivor.isClosed()) return;
              var multipolygons = graph.parentMultipolygons(survivor).filter(function (multipolygon) {
                // find multipolygons where the survivor is the only member
                return multipolygon.members.length === 1;
              }); // skip if this is the single member of multiple multipolygons

              if (multipolygons.length !== 1) return;
              var multipolygon = multipolygons[0];

              for (var key in survivor.tags) {
                if (multipolygon.tags[key] && // don't collapse if tags cannot be cleanly merged
                multipolygon.tags[key] !== survivor.tags[key]) return;
              }

              survivor = survivor.mergeTags(multipolygon.tags);
              graph = graph.replace(survivor);
              graph = actionDeleteRelation(multipolygon.id, true
              /* allow untagged members */
              )(graph);
              var tags = Object.assign({}, survivor.tags);

              if (survivor.geometry(graph) !== 'area') {
                // ensure the feature persists as an area
                tags.area = 'yes';
              }

              delete tags.type; // remove type=multipolygon

              survivor = survivor.update({
                tags: tags
              });
              graph = graph.replace(survivor);
            }

            checkForSimpleMultipolygon();
            return graph;
          }; // Returns the number of nodes the resultant way is expected to have


          action.resultingWayNodesLength = function (graph) {
            return ids.reduce(function (count, id) {
              return count + graph.entity(id).nodes.length;
            }, 0) - ids.length - 1;
          };

          action.disabled = function (graph) {
            var geometries = groupEntitiesByGeometry(graph);

            if (ids.length < 2 || ids.length !== geometries.line.length) {
              return 'not_eligible';
            }

            var joined = osmJoinWays(ids.map(graph.entity, graph), graph);

            if (joined.length > 1) {
              return 'not_adjacent';
            } // Loop through all combinations of path-pairs
            // to check potential intersections between all pairs


            for (var i = 0; i < ids.length - 1; i++) {
              for (var j = i + 1; j < ids.length; j++) {
                var path1 = graph.childNodes(graph.entity(ids[i])).map(function (e) {
                  return e.loc;
                });
                var path2 = graph.childNodes(graph.entity(ids[j])).map(function (e) {
                  return e.loc;
                });
                var intersections = geoPathIntersections(path1, path2); // Check if intersections are just nodes lying on top of
                // each other/the line, as opposed to crossing it

                var common = utilArrayIntersection(joined[0].nodes.map(function (n) {
                  return n.loc.toString();
                }), intersections.map(function (n) {
                  return n.toString();
                }));

                if (common.length !== intersections.length) {
                  return 'paths_intersect';
                }
              }
            }

            var nodeIds = joined[0].nodes.map(function (n) {
              return n.id;
            }).slice(1, -1);
            var relation;
            var tags = {};
            var conflicting = false;
            joined[0].forEach(function (way) {
              var parents = graph.parentRelations(way);
              parents.forEach(function (parent) {
                if (parent.isRestriction() && parent.members.some(function (m) {
                  return nodeIds.indexOf(m.id) >= 0;
                })) {
                  relation = parent;
                }
              });

              for (var k in way.tags) {
                if (!(k in tags)) {
                  tags[k] = way.tags[k];
                } else if (tags[k] && osmIsInterestingTag(k) && tags[k] !== way.tags[k]) {
                  conflicting = true;
                }
              }
            });

            if (relation) {
              return 'restriction';
            }

            if (conflicting) {
              return 'conflicting_tags';
            }
          };

          return action;
        }

        function actionMerge(ids) {
          function groupEntitiesByGeometry(graph) {
            var entities = ids.map(function (id) {
              return graph.entity(id);
            });
            return Object.assign({
              point: [],
              area: [],
              line: [],
              relation: []
            }, utilArrayGroupBy(entities, function (entity) {
              return entity.geometry(graph);
            }));
          }

          var action = function action(graph) {
            var geometries = groupEntitiesByGeometry(graph);
            var target = geometries.area[0] || geometries.line[0];
            var points = geometries.point;
            points.forEach(function (point) {
              target = target.mergeTags(point.tags);
              graph = graph.replace(target);
              graph.parentRelations(point).forEach(function (parent) {
                graph = graph.replace(parent.replaceMember(point, target));
              });
              var nodes = utilArrayUniq(graph.childNodes(target));
              var removeNode = point;

              for (var i = 0; i < nodes.length; i++) {
                var node = nodes[i];

                if (graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags()) {
                  continue;
                } // Found an uninteresting child node on the target way.
                // Move orig point into its place to preserve point's history. #3683


                graph = graph.replace(point.update({
                  tags: {},
                  loc: node.loc
                }));
                target = target.replaceNode(node.id, point.id);
                graph = graph.replace(target);
                removeNode = node;
                break;
              }

              graph = graph.remove(removeNode);
            });

            if (target.tags.area === 'yes') {
              var tags = Object.assign({}, target.tags); // shallow copy

              delete tags.area;

              if (osmTagSuggestingArea(tags)) {
                // remove the `area` tag if area geometry is now implied - #3851
                target = target.update({
                  tags: tags
                });
                graph = graph.replace(target);
              }
            }

            return graph;
          };

          action.disabled = function (graph) {
            var geometries = groupEntitiesByGeometry(graph);

            if (geometries.point.length === 0 || geometries.area.length + geometries.line.length !== 1 || geometries.relation.length !== 0) {
              return 'not_eligible';
            }
          };

          return action;
        }

        //
        // 1. move all the nodes to a common location
        // 2. `actionConnect` them

        function actionMergeNodes(nodeIDs, loc) {
          // If there is a single "interesting" node, use that as the location.
          // Otherwise return the average location of all the nodes.
          function chooseLoc(graph) {
            if (!nodeIDs.length) return null;
            var sum = [0, 0];
            var interestingCount = 0;
            var interestingLoc;

            for (var i = 0; i < nodeIDs.length; i++) {
              var node = graph.entity(nodeIDs[i]);

              if (node.hasInterestingTags()) {
                interestingLoc = ++interestingCount === 1 ? node.loc : null;
              }

              sum = geoVecAdd(sum, node.loc);
            }

            return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
          }

          var action = function action(graph) {
            if (nodeIDs.length < 2) return graph;
            var toLoc = loc;

            if (!toLoc) {
              toLoc = chooseLoc(graph);
            }

            for (var i = 0; i < nodeIDs.length; i++) {
              var node = graph.entity(nodeIDs[i]);

              if (node.loc !== toLoc) {
                graph = graph.replace(node.move(toLoc));
              }
            }

            return actionConnect(nodeIDs)(graph);
          };

          action.disabled = function (graph) {
            if (nodeIDs.length < 2) return 'not_eligible';

            for (var i = 0; i < nodeIDs.length; i++) {
              var entity = graph.entity(nodeIDs[i]);
              if (entity.type !== 'node') return 'not_eligible';
            }

            return actionConnect(nodeIDs).disabled(graph);
          };

          return action;
        }

        function osmChangeset() {
          if (!(this instanceof osmChangeset)) {
            return new osmChangeset().initialize(arguments);
          } else if (arguments.length) {
            this.initialize(arguments);
          }
        }
        osmEntity.changeset = osmChangeset;
        osmChangeset.prototype = Object.create(osmEntity.prototype);
        Object.assign(osmChangeset.prototype, {
          type: 'changeset',
          extent: function extent() {
            return new geoExtent();
          },
          geometry: function geometry() {
            return 'changeset';
          },
          asJXON: function asJXON() {
            return {
              osm: {
                changeset: {
                  tag: Object.keys(this.tags).map(function (k) {
                    return {
                      '@k': k,
                      '@v': this.tags[k]
                    };
                  }, this),
                  '@version': 0.6,
                  '@generator': 'iD'
                }
              }
            };
          },
          // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
          // XML. Returns a string.
          osmChangeJXON: function osmChangeJXON(changes) {
            var changeset_id = this.id;

            function nest(x, order) {
              var groups = {};

              for (var i = 0; i < x.length; i++) {
                var tagName = Object.keys(x[i])[0];
                if (!groups[tagName]) groups[tagName] = [];
                groups[tagName].push(x[i][tagName]);
              }

              var ordered = {};
              order.forEach(function (o) {
                if (groups[o]) ordered[o] = groups[o];
              });
              return ordered;
            } // sort relations in a changeset by dependencies


            function sort(changes) {
              // find a referenced relation in the current changeset
              function resolve(item) {
                return relations.find(function (relation) {
                  return item.keyAttributes.type === 'relation' && item.keyAttributes.ref === relation['@id'];
                });
              } // a new item is an item that has not been already processed


              function isNew(item) {
                return !sorted[item['@id']] && !processing.find(function (proc) {
                  return proc['@id'] === item['@id'];
                });
              }

              var processing = [];
              var sorted = {};
              var relations = changes.relation;
              if (!relations) return changes;

              for (var i = 0; i < relations.length; i++) {
                var relation = relations[i]; // skip relation if already sorted

                if (!sorted[relation['@id']]) {
                  processing.push(relation);
                }

                while (processing.length > 0) {
                  var next = processing[0],
                      deps = next.member.map(resolve).filter(Boolean).filter(isNew);

                  if (deps.length === 0) {
                    sorted[next['@id']] = next;
                    processing.shift();
                  } else {
                    processing = deps.concat(processing);
                  }
                }
              }

              changes.relation = Object.values(sorted);
              return changes;
            }

            function rep(entity) {
              return entity.asJXON(changeset_id);
            }

            return {
              osmChange: {
                '@version': 0.6,
                '@generator': 'iD',
                'create': sort(nest(changes.created.map(rep), ['node', 'way', 'relation'])),
                'modify': nest(changes.modified.map(rep), ['node', 'way', 'relation']),
                'delete': Object.assign(nest(changes.deleted.map(rep), ['relation', 'way', 'node']), {
                  '@if-unused': true
                })
              }
            };
          },
          asGeoJSON: function asGeoJSON() {
            return {};
          }
        });

        function osmNote() {
          if (!(this instanceof osmNote)) {
            return new osmNote().initialize(arguments);
          } else if (arguments.length) {
            this.initialize(arguments);
          }
        }

        osmNote.id = function () {
          return osmNote.id.next--;
        };

        osmNote.id.next = -1;
        Object.assign(osmNote.prototype, {
          type: 'note',
          initialize: function initialize(sources) {
            for (var i = 0; i < sources.length; ++i) {
              var source = sources[i];

              for (var prop in source) {
                if (Object.prototype.hasOwnProperty.call(source, prop)) {
                  if (source[prop] === undefined) {
                    delete this[prop];
                  } else {
                    this[prop] = source[prop];
                  }
                }
              }
            }

            if (!this.id) {
              this.id = osmNote.id().toString();
            }

            return this;
          },
          extent: function extent() {
            return new geoExtent(this.loc);
          },
          update: function update(attrs) {
            return osmNote(this, attrs); // {v: 1 + (this.v || 0)}
          },
          isNew: function isNew() {
            return this.id < 0;
          },
          move: function move(loc) {
            return this.update({
              loc: loc
            });
          }
        });

        function osmRelation() {
          if (!(this instanceof osmRelation)) {
            return new osmRelation().initialize(arguments);
          } else if (arguments.length) {
            this.initialize(arguments);
          }
        }
        osmEntity.relation = osmRelation;
        osmRelation.prototype = Object.create(osmEntity.prototype);

        osmRelation.creationOrder = function (a, b) {
          var aId = parseInt(osmEntity.id.toOSM(a.id), 10);
          var bId = parseInt(osmEntity.id.toOSM(b.id), 10);
          if (aId < 0 || bId < 0) return aId - bId;
          return bId - aId;
        };

        Object.assign(osmRelation.prototype, {
          type: 'relation',
          members: [],
          copy: function copy(resolver, copies) {
            if (copies[this.id]) return copies[this.id];
            var copy = osmEntity.prototype.copy.call(this, resolver, copies);
            var members = this.members.map(function (member) {
              return Object.assign({}, member, {
                id: resolver.entity(member.id).copy(resolver, copies).id
              });
            });
            copy = copy.update({
              members: members
            });
            copies[this.id] = copy;
            return copy;
          },
          extent: function extent(resolver, memo) {
            return resolver["transient"](this, 'extent', function () {
              if (memo && memo[this.id]) return geoExtent();
              memo = memo || {};
              memo[this.id] = true;
              var extent = geoExtent();

              for (var i = 0; i < this.members.length; i++) {
                var member = resolver.hasEntity(this.members[i].id);

                if (member) {
                  extent._extend(member.extent(resolver, memo));
                }
              }

              return extent;
            });
          },
          geometry: function geometry(graph) {
            return graph["transient"](this, 'geometry', function () {
              return this.isMultipolygon() ? 'area' : 'relation';
            });
          },
          isDegenerate: function isDegenerate() {
            return this.members.length === 0;
          },
          // Return an array of members, each extended with an 'index' property whose value
          // is the member index.
          indexedMembers: function indexedMembers() {
            var result = new Array(this.members.length);

            for (var i = 0; i < this.members.length; i++) {
              result[i] = Object.assign({}, this.members[i], {
                index: i
              });
            }

            return result;
          },
          // Return the first member with the given role. A copy of the member object
          // is returned, extended with an 'index' property whose value is the member index.
          memberByRole: function memberByRole(role) {
            for (var i = 0; i < this.members.length; i++) {
              if (this.members[i].role === role) {
                return Object.assign({}, this.members[i], {
                  index: i
                });
              }
            }
          },
          // Same as memberByRole, but returns all members with the given role
          membersByRole: function membersByRole(role) {
            var result = [];

            for (var i = 0; i < this.members.length; i++) {
              if (this.members[i].role === role) {
                result.push(Object.assign({}, this.members[i], {
                  index: i
                }));
              }
            }

            return result;
          },
          // Return the first member with the given id. A copy of the member object
          // is returned, extended with an 'index' property whose value is the member index.
          memberById: function memberById(id) {
            for (var i = 0; i < this.members.length; i++) {
              if (this.members[i].id === id) {
                return Object.assign({}, this.members[i], {
                  index: i
                });
              }
            }
          },
          // Return the first member with the given id and role. A copy of the member object
          // is returned, extended with an 'index' property whose value is the member index.
          memberByIdAndRole: function memberByIdAndRole(id, role) {
            for (var i = 0; i < this.members.length; i++) {
              if (this.members[i].id === id && this.members[i].role === role) {
                return Object.assign({}, this.members[i], {
                  index: i
                });
              }
            }
          },
          addMember: function addMember(member, index) {
            var members = this.members.slice();
            members.splice(index === undefined ? members.length : index, 0, member);
            return this.update({
              members: members
            });
          },
          updateMember: function updateMember(member, index) {
            var members = this.members.slice();
            members.splice(index, 1, Object.assign({}, members[index], member));
            return this.update({
              members: members
            });
          },
          removeMember: function removeMember(index) {
            var members = this.members.slice();
            members.splice(index, 1);
            return this.update({
              members: members
            });
          },
          removeMembersWithID: function removeMembersWithID(id) {
            var members = this.members.filter(function (m) {
              return m.id !== id;
            });
            return this.update({
              members: members
            });
          },
          moveMember: function moveMember(fromIndex, toIndex) {
            var members = this.members.slice();
            members.splice(toIndex, 0, members.splice(fromIndex, 1)[0]);
            return this.update({
              members: members
            });
          },
          // Wherever a member appears with id `needle.id`, replace it with a member
          // with id `replacement.id`, type `replacement.type`, and the original role,
          // By default, adding a duplicate member (by id and role) is prevented.
          // Return an updated relation.
          replaceMember: function replaceMember(needle, replacement, keepDuplicates) {
            if (!this.memberById(needle.id)) return this;
            var members = [];

            for (var i = 0; i < this.members.length; i++) {
              var member = this.members[i];

              if (member.id !== needle.id) {
                members.push(member);
              } else if (keepDuplicates || !this.memberByIdAndRole(replacement.id, member.role)) {
                members.push({
                  id: replacement.id,
                  type: replacement.type,
                  role: member.role
                });
              }
            }

            return this.update({
              members: members
            });
          },
          asJXON: function asJXON(changeset_id) {
            var r = {
              relation: {
                '@id': this.osmId(),
                '@version': this.version || 0,
                member: this.members.map(function (member) {
                  return {
                    keyAttributes: {
                      type: member.type,
                      role: member.role,
                      ref: osmEntity.id.toOSM(member.id)
                    }
                  };
                }, this),
                tag: Object.keys(this.tags).map(function (k) {
                  return {
                    keyAttributes: {
                      k: k,
                      v: this.tags[k]
                    }
                  };
                }, this)
              }
            };

            if (changeset_id) {
              r.relation['@changeset'] = changeset_id;
            }

            return r;
          },
          asGeoJSON: function asGeoJSON(resolver) {
            return resolver["transient"](this, 'GeoJSON', function () {
              if (this.isMultipolygon()) {
                return {
                  type: 'MultiPolygon',
                  coordinates: this.multipolygon(resolver)
                };
              } else {
                return {
                  type: 'FeatureCollection',
                  properties: this.tags,
                  features: this.members.map(function (member) {
                    return Object.assign({
                      role: member.role
                    }, resolver.entity(member.id).asGeoJSON(resolver));
                  })
                };
              }
            });
          },
          area: function area(resolver) {
            return resolver["transient"](this, 'area', function () {
              return d3_geoArea(this.asGeoJSON(resolver));
            });
          },
          isMultipolygon: function isMultipolygon() {
            return this.tags.type === 'multipolygon';
          },
          isComplete: function isComplete(resolver) {
            for (var i = 0; i < this.members.length; i++) {
              if (!resolver.hasEntity(this.members[i].id)) {
                return false;
              }
            }

            return true;
          },
          hasFromViaTo: function hasFromViaTo() {
            return this.members.some(function (m) {
              return m.role === 'from';
            }) && this.members.some(function (m) {
              return m.role === 'via';
            }) && this.members.some(function (m) {
              return m.role === 'to';
            });
          },
          isRestriction: function isRestriction() {
            return !!(this.tags.type && this.tags.type.match(/^restriction:?/));
          },
          isValidRestriction: function isValidRestriction() {
            if (!this.isRestriction()) return false;
            var froms = this.members.filter(function (m) {
              return m.role === 'from';
            });
            var vias = this.members.filter(function (m) {
              return m.role === 'via';
            });
            var tos = this.members.filter(function (m) {
              return m.role === 'to';
            });
            if (froms.length !== 1 && this.tags.restriction !== 'no_entry') return false;
            if (froms.some(function (m) {
              return m.type !== 'way';
            })) return false;
            if (tos.length !== 1 && this.tags.restriction !== 'no_exit') return false;
            if (tos.some(function (m) {
              return m.type !== 'way';
            })) return false;
            if (vias.length === 0) return false;
            if (vias.length > 1 && vias.some(function (m) {
              return m.type !== 'way';
            })) return false;
            return true;
          },
          // Returns an array [A0, ... An], each Ai being an array of node arrays [Nds0, ... Ndsm],
          // where Nds0 is an outer ring and subsequent Ndsi's (if any i > 0) being inner rings.
          //
          // This corresponds to the structure needed for rendering a multipolygon path using a
          // `evenodd` fill rule, as well as the structure of a GeoJSON MultiPolygon geometry.
          //
          // In the case of invalid geometries, this function will still return a result which
          // includes the nodes of all way members, but some Nds may be unclosed and some inner
          // rings not matched with the intended outer ring.
          //
          multipolygon: function multipolygon(resolver) {
            var outers = this.members.filter(function (m) {
              return 'outer' === (m.role || 'outer');
            });
            var inners = this.members.filter(function (m) {
              return 'inner' === m.role;
            });
            outers = osmJoinWays(outers, resolver);
            inners = osmJoinWays(inners, resolver);

            var sequenceToLineString = function sequenceToLineString(sequence) {
              if (sequence.nodes.length > 2 && sequence.nodes[0] !== sequence.nodes[sequence.nodes.length - 1]) {
                // close unclosed parts to ensure correct area rendering - #2945
                sequence.nodes.push(sequence.nodes[0]);
              }

              return sequence.nodes.map(function (node) {
                return node.loc;
              });
            };

            outers = outers.map(sequenceToLineString);
            inners = inners.map(sequenceToLineString);
            var result = outers.map(function (o) {
              // Heuristic for detecting counterclockwise winding order. Assumes
              // that OpenStreetMap polygons are not hemisphere-spanning.
              return [d3_geoArea({
                type: 'Polygon',
                coordinates: [o]
              }) > 2 * Math.PI ? o.reverse() : o];
            });

            function findOuter(inner) {
              var o, outer;

              for (o = 0; o < outers.length; o++) {
                outer = outers[o];

                if (geoPolygonContainsPolygon(outer, inner)) {
                  return o;
                }
              }

              for (o = 0; o < outers.length; o++) {
                outer = outers[o];

                if (geoPolygonIntersectsPolygon(outer, inner, false)) {
                  return o;
                }
              }
            }

            for (var i = 0; i < inners.length; i++) {
              var inner = inners[i];

              if (d3_geoArea({
                type: 'Polygon',
                coordinates: [inner]
              }) < 2 * Math.PI) {
                inner = inner.reverse();
              }

              var o = findOuter(inners[i]);

              if (o !== undefined) {
                result[o].push(inners[i]);
              } else {
                result.push([inners[i]]); // Invalid geometry
              }
            }

            return result;
          }
        });

        var QAItem = /*#__PURE__*/function () {
          function QAItem(loc, service, itemType, id, props) {
            _classCallCheck$1(this, QAItem);

            // Store required properties
            this.loc = loc;
            this.service = service.title;
            this.itemType = itemType; // All issues must have an ID for selection, use generic if none specified

            this.id = id ? id : "".concat(QAItem.id());
            this.update(props); // Some QA services have marker icons to differentiate issues

            if (service && typeof service.getIcon === 'function') {
              this.icon = service.getIcon(itemType);
            }
          }

          _createClass$1(QAItem, [{
            key: "update",
            value: function update(props) {
              var _this = this;

              // You can't override this initial information
              var loc = this.loc,
                  service = this.service,
                  itemType = this.itemType,
                  id = this.id;
              Object.keys(props).forEach(function (prop) {
                return _this[prop] = props[prop];
              });
              this.loc = loc;
              this.service = service;
              this.itemType = itemType;
              this.id = id;
              return this;
            } // Generic handling for newly created QAItems

          }], [{
            key: "id",
            value: function id() {
              return this.nextId--;
            }
          }]);

          return QAItem;
        }();
        QAItem.nextId = -1;

        //
        // Optionally, split only the given ways, if multiple ways share
        // the given node.
        //
        // This is the inverse of `iD.actionJoin`.
        //
        // For testing convenience, accepts an ID to assign to the new way.
        // Normally, this will be undefined and the way will automatically
        // be assigned a new ID.
        //
        // Reference:
        //   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/SplitWayAction.as
        //

        function actionSplit(nodeIds, newWayIds) {
          // accept single ID for backwards-compatiblity
          if (typeof nodeIds === 'string') nodeIds = [nodeIds];

          var _wayIDs; // the strategy for picking which way will have a new version and which way is newly created


          var _keepHistoryOn = 'longest'; // 'longest', 'first'
          // The IDs of the ways actually created by running this action

          var _createdWayIDs = [];

          function dist(graph, nA, nB) {
            var locA = graph.entity(nA).loc;
            var locB = graph.entity(nB).loc;
            var epsilon = 1e-6;
            return locA && locB ? geoSphericalDistance(locA, locB) : epsilon;
          } // If the way is closed, we need to search for a partner node
          // to split the way at.
          //
          // The following looks for a node that is both far away from
          // the initial node in terms of way segment length and nearby
          // in terms of beeline-distance. This assures that areas get
          // split on the most "natural" points (independent of the number
          // of nodes).
          // For example: bone-shaped areas get split across their waist
          // line, circles across the diameter.


          function splitArea(nodes, idxA, graph) {
            var lengths = new Array(nodes.length);
            var length;
            var i;
            var best = 0;
            var idxB;

            function wrap(index) {
              return utilWrap(index, nodes.length);
            } // calculate lengths


            length = 0;

            for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
              length += dist(graph, nodes[i], nodes[wrap(i - 1)]);
              lengths[i] = length;
            }

            length = 0;

            for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
              length += dist(graph, nodes[i], nodes[wrap(i + 1)]);

              if (length < lengths[i]) {
                lengths[i] = length;
              }
            } // determine best opposite node to split


            for (i = 0; i < nodes.length; i++) {
              var cost = lengths[i] / dist(graph, nodes[idxA], nodes[i]);

              if (cost > best) {
                idxB = i;
                best = cost;
              }
            }

            return idxB;
          }

          function totalLengthBetweenNodes(graph, nodes) {
            var totalLength = 0;

            for (var i = 0; i < nodes.length - 1; i++) {
              totalLength += dist(graph, nodes[i], nodes[i + 1]);
            }

            return totalLength;
          }

          function split(graph, nodeId, wayA, newWayId) {
            var wayB = osmWay({
              id: newWayId,
              tags: wayA.tags
            }); // `wayB` is the NEW way

            var origNodes = wayA.nodes.slice();
            var nodesA;
            var nodesB;
            var isArea = wayA.isArea();
            var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);

            if (wayA.isClosed()) {
              var nodes = wayA.nodes.slice(0, -1);
              var idxA = nodes.indexOf(nodeId);
              var idxB = splitArea(nodes, idxA, graph);

              if (idxB < idxA) {
                nodesA = nodes.slice(idxA).concat(nodes.slice(0, idxB + 1));
                nodesB = nodes.slice(idxB, idxA + 1);
              } else {
                nodesA = nodes.slice(idxA, idxB + 1);
                nodesB = nodes.slice(idxB).concat(nodes.slice(0, idxA + 1));
              }
            } else {
              var idx = wayA.nodes.indexOf(nodeId, 1);
              nodesA = wayA.nodes.slice(0, idx + 1);
              nodesB = wayA.nodes.slice(idx);
            }

            var lengthA = totalLengthBetweenNodes(graph, nodesA);
            var lengthB = totalLengthBetweenNodes(graph, nodesB);

            if (_keepHistoryOn === 'longest' && lengthB > lengthA) {
              // keep the history on the longer way, regardless of the node count
              wayA = wayA.update({
                nodes: nodesB
              });
              wayB = wayB.update({
                nodes: nodesA
              });
              var temp = lengthA;
              lengthA = lengthB;
              lengthB = temp;
            } else {
              wayA = wayA.update({
                nodes: nodesA
              });
              wayB = wayB.update({
                nodes: nodesB
              });
            }

            if (wayA.tags.step_count) {
              // divide up the the step count proportionally between the two ways
              var stepCount = parseFloat(wayA.tags.step_count);

              if (stepCount && // ensure a number
              isFinite(stepCount) && // ensure positive
              stepCount > 0 && // ensure integer
              Math.round(stepCount) === stepCount) {
                var tagsA = Object.assign({}, wayA.tags);
                var tagsB = Object.assign({}, wayB.tags);
                var ratioA = lengthA / (lengthA + lengthB);
                var countA = Math.round(stepCount * ratioA);
                tagsA.step_count = countA.toString();
                tagsB.step_count = (stepCount - countA).toString();
                wayA = wayA.update({
                  tags: tagsA
                });
                wayB = wayB.update({
                  tags: tagsB
                });
              }
            }

            graph = graph.replace(wayA);
            graph = graph.replace(wayB);
            graph.parentRelations(wayA).forEach(function (relation) {
              var member; // Turn restrictions - make sure:
              // 1. Splitting a FROM/TO way - only `wayA` OR `wayB` remains in relation
              //    (whichever one is connected to the VIA node/ways)
              // 2. Splitting a VIA way - `wayB` remains in relation as a VIA way

              if (relation.hasFromViaTo()) {
                var f = relation.memberByRole('from');
                var v = relation.membersByRole('via');
                var t = relation.memberByRole('to');
                var i; // 1. split a FROM/TO

                if (f.id === wayA.id || t.id === wayA.id) {
                  var keepB = false;

                  if (v.length === 1 && v[0].type === 'node') {
                    // check via node
                    keepB = wayB.contains(v[0].id);
                  } else {
                    // check via way(s)
                    for (i = 0; i < v.length; i++) {
                      if (v[i].type === 'way') {
                        var wayVia = graph.hasEntity(v[i].id);

                        if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
                          keepB = true;
                          break;
                        }
                      }
                    }
                  }

                  if (keepB) {
                    relation = relation.replaceMember(wayA, wayB);
                    graph = graph.replace(relation);
                  } // 2. split a VIA

                } else {
                  for (i = 0; i < v.length; i++) {
                    if (v[i].type === 'way' && v[i].id === wayA.id) {
                      member = {
                        id: wayB.id,
                        type: 'way',
                        role: 'via'
                      };
                      graph = actionAddMember(relation.id, member, v[i].index + 1)(graph);
                      break;
                    }
                  }
                } // All other relations (Routes, Multipolygons, etc):
                // 1. Both `wayA` and `wayB` remain in the relation
                // 2. But must be inserted as a pair (see `actionAddMember` for details)

              } else {
                if (relation === isOuter) {
                  graph = graph.replace(relation.mergeTags(wayA.tags));
                  graph = graph.replace(wayA.update({
                    tags: {}
                  }));
                  graph = graph.replace(wayB.update({
                    tags: {}
                  }));
                }

                member = {
                  id: wayB.id,
                  type: 'way',
                  role: relation.memberById(wayA.id).role
                };
                var insertPair = {
                  originalID: wayA.id,
                  insertedID: wayB.id,
                  nodes: origNodes
                };
                graph = actionAddMember(relation.id, member, undefined, insertPair)(graph);
              }
            });

            if (!isOuter && isArea) {
              var multipolygon = osmRelation({
                tags: Object.assign({}, wayA.tags, {
                  type: 'multipolygon'
                }),
                members: [{
                  id: wayA.id,
                  role: 'outer',
                  type: 'way'
                }, {
                  id: wayB.id,
                  role: 'outer',
                  type: 'way'
                }]
              });
              graph = graph.replace(multipolygon);
              graph = graph.replace(wayA.update({
                tags: {}
              }));
              graph = graph.replace(wayB.update({
                tags: {}
              }));
            }

            _createdWayIDs.push(wayB.id);

            return graph;
          }

          var action = function action(graph) {
            _createdWayIDs = [];
            var newWayIndex = 0;

            for (var i = 0; i < nodeIds.length; i++) {
              var nodeId = nodeIds[i];
              var candidates = action.waysForNode(nodeId, graph);

              for (var j = 0; j < candidates.length; j++) {
                graph = split(graph, nodeId, candidates[j], newWayIds && newWayIds[newWayIndex]);
                newWayIndex += 1;
              }
            }

            return graph;
          };

          action.getCreatedWayIDs = function () {
            return _createdWayIDs;
          };

          action.waysForNode = function (nodeId, graph) {
            var node = graph.entity(nodeId);
            var splittableParents = graph.parentWays(node).filter(isSplittable);

            if (!_wayIDs) {
              // If the ways to split aren't specified, only split the lines.
              // If there are no lines to split, split the areas.
              var hasLine = splittableParents.some(function (parent) {
                return parent.geometry(graph) === 'line';
              });

              if (hasLine) {
                return splittableParents.filter(function (parent) {
                  return parent.geometry(graph) === 'line';
                });
              }
            }

            return splittableParents;

            function isSplittable(parent) {
              // If the ways to split are specified, ignore everything else.
              if (_wayIDs && _wayIDs.indexOf(parent.id) === -1) return false; // We can fake splitting closed ways at their endpoints...

              if (parent.isClosed()) return true; // otherwise, we can't split nodes at their endpoints.

              for (var i = 1; i < parent.nodes.length - 1; i++) {
                if (parent.nodes[i] === nodeId) return true;
              }

              return false;
            }
          };

          action.ways = function (graph) {
            return utilArrayUniq([].concat.apply([], nodeIds.map(function (nodeId) {
              return action.waysForNode(nodeId, graph);
            })));
          };

          action.disabled = function (graph) {
            for (var i = 0; i < nodeIds.length; i++) {
              var nodeId = nodeIds[i];
              var candidates = action.waysForNode(nodeId, graph);

              if (candidates.length === 0 || _wayIDs && _wayIDs.length !== candidates.length) {
                return 'not_eligible';
              }
            }
          };

          action.limitWays = function (val) {
            if (!arguments.length) return _wayIDs;
            _wayIDs = val;
            return action;
          };

          action.keepHistoryOn = function (val) {
            if (!arguments.length) return _keepHistoryOn;
            _keepHistoryOn = val;
            return action;
          };

          return action;
        }

        function coreGraph(other, mutable) {
          if (!(this instanceof coreGraph)) return new coreGraph(other, mutable);

          if (other instanceof coreGraph) {
            var base = other.base();
            this.entities = Object.assign(Object.create(base.entities), other.entities);
            this._parentWays = Object.assign(Object.create(base.parentWays), other._parentWays);
            this._parentRels = Object.assign(Object.create(base.parentRels), other._parentRels);
          } else {
            this.entities = Object.create({});
            this._parentWays = Object.create({});
            this._parentRels = Object.create({});
            this.rebase(other || [], [this]);
          }

          this.transients = {};
          this._childNodes = {};
          this.frozen = !mutable;
        }
        coreGraph.prototype = {
          hasEntity: function hasEntity(id) {
            return this.entities[id];
          },
          entity: function entity(id) {
            var entity = this.entities[id]; //https://github.com/openstreetmap/iD/issues/3973#issuecomment-307052376

            if (!entity) {
              entity = this.entities.__proto__[id]; // eslint-disable-line no-proto
            }

            if (!entity) {
              throw new Error('entity ' + id + ' not found');
            }

            return entity;
          },
          geometry: function geometry(id) {
            return this.entity(id).geometry(this);
          },
          "transient": function transient(entity, key, fn) {
            var id = entity.id;
            var transients = this.transients[id] || (this.transients[id] = {});

            if (transients[key] !== undefined) {
              return transients[key];
            }

            transients[key] = fn.call(entity);
            return transients[key];
          },
          parentWays: function parentWays(entity) {
            var parents = this._parentWays[entity.id];
            var result = [];

            if (parents) {
              parents.forEach(function (id) {
                result.push(this.entity(id));
              }, this);
            }

            return result;
          },
          isPoi: function isPoi(entity) {
            var parents = this._parentWays[entity.id];
            return !parents || parents.size === 0;
          },
          isShared: function isShared(entity) {
            var parents = this._parentWays[entity.id];
            return parents && parents.size > 1;
          },
          parentRelations: function parentRelations(entity) {
            var parents = this._parentRels[entity.id];
            var result = [];

            if (parents) {
              parents.forEach(function (id) {
                result.push(this.entity(id));
              }, this);
            }

            return result;
          },
          parentMultipolygons: function parentMultipolygons(entity) {
            return this.parentRelations(entity).filter(function (relation) {
              return relation.isMultipolygon();
            });
          },
          childNodes: function childNodes(entity) {
            if (this._childNodes[entity.id]) return this._childNodes[entity.id];
            if (!entity.nodes) return [];
            var nodes = [];

            for (var i = 0; i < entity.nodes.length; i++) {
              nodes[i] = this.entity(entity.nodes[i]);
            }
            this._childNodes[entity.id] = nodes;
            return this._childNodes[entity.id];
          },
          base: function base() {
            return {
              'entities': Object.getPrototypeOf(this.entities),
              'parentWays': Object.getPrototypeOf(this._parentWays),
              'parentRels': Object.getPrototypeOf(this._parentRels)
            };
          },
          // Unlike other graph methods, rebase mutates in place. This is because it
          // is used only during the history operation that merges newly downloaded
          // data into each state. To external consumers, it should appear as if the
          // graph always contained the newly downloaded data.
          rebase: function rebase(entities, stack, force) {
            var base = this.base();
            var i, j, k, id;

            for (i = 0; i < entities.length; i++) {
              var entity = entities[i];
              if (!entity.visible || !force && base.entities[entity.id]) continue; // Merging data into the base graph

              base.entities[entity.id] = entity;

              this._updateCalculated(undefined, entity, base.parentWays, base.parentRels); // Restore provisionally-deleted nodes that are discovered to have an extant parent


              if (entity.type === 'way') {
                for (j = 0; j < entity.nodes.length; j++) {
                  id = entity.nodes[j];

                  for (k = 1; k < stack.length; k++) {
                    var ents = stack[k].entities;

                    if (ents.hasOwnProperty(id) && ents[id] === undefined) {
                      delete ents[id];
                    }
                  }
                }
              }
            }

            for (i = 0; i < stack.length; i++) {
              stack[i]._updateRebased();
            }
          },
          _updateRebased: function _updateRebased() {
            var base = this.base();
            Object.keys(this._parentWays).forEach(function (child) {
              if (base.parentWays[child]) {
                base.parentWays[child].forEach(function (id) {
                  if (!this.entities.hasOwnProperty(id)) {
                    this._parentWays[child].add(id);
                  }
                }, this);
              }
            }, this);
            Object.keys(this._parentRels).forEach(function (child) {
              if (base.parentRels[child]) {
                base.parentRels[child].forEach(function (id) {
                  if (!this.entities.hasOwnProperty(id)) {
                    this._parentRels[child].add(id);
                  }
                }, this);
              }
            }, this);
            this.transients = {}; // this._childNodes is not updated, under the assumption that
            // ways are always downloaded with their child nodes.
          },
          // Updates calculated properties (parentWays, parentRels) for the specified change
          _updateCalculated: function _updateCalculated(oldentity, entity, parentWays, parentRels) {
            parentWays = parentWays || this._parentWays;
            parentRels = parentRels || this._parentRels;
            var type = entity && entity.type || oldentity && oldentity.type;
            var removed, added, i;

            if (type === 'way') {
              // Update parentWays
              if (oldentity && entity) {
                removed = utilArrayDifference(oldentity.nodes, entity.nodes);
                added = utilArrayDifference(entity.nodes, oldentity.nodes);
              } else if (oldentity) {
                removed = oldentity.nodes;
                added = [];
              } else if (entity) {
                removed = [];
                added = entity.nodes;
              }

              for (i = 0; i < removed.length; i++) {
                // make a copy of prototype property, store as own property, and update..
                parentWays[removed[i]] = new Set(parentWays[removed[i]]);
                parentWays[removed[i]]["delete"](oldentity.id);
              }

              for (i = 0; i < added.length; i++) {
                // make a copy of prototype property, store as own property, and update..
                parentWays[added[i]] = new Set(parentWays[added[i]]);
                parentWays[added[i]].add(entity.id);
              }
            } else if (type === 'relation') {
              // Update parentRels
              // diff only on the IDs since the same entity can be a member multiple times with different roles
              var oldentityMemberIDs = oldentity ? oldentity.members.map(function (m) {
                return m.id;
              }) : [];
              var entityMemberIDs = entity ? entity.members.map(function (m) {
                return m.id;
              }) : [];

              if (oldentity && entity) {
                removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
                added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
              } else if (oldentity) {
                removed = oldentityMemberIDs;
                added = [];
              } else if (entity) {
                removed = [];
                added = entityMemberIDs;
              }

              for (i = 0; i < removed.length; i++) {
                // make a copy of prototype property, store as own property, and update..
                parentRels[removed[i]] = new Set(parentRels[removed[i]]);
                parentRels[removed[i]]["delete"](oldentity.id);
              }

              for (i = 0; i < added.length; i++) {
                // make a copy of prototype property, store as own property, and update..
                parentRels[added[i]] = new Set(parentRels[added[i]]);
                parentRels[added[i]].add(entity.id);
              }
            }
          },
          replace: function replace(entity) {
            if (this.entities[entity.id] === entity) return this;
            return this.update(function () {
              this._updateCalculated(this.entities[entity.id], entity);

              this.entities[entity.id] = entity;
            });
          },
          remove: function remove(entity) {
            return this.update(function () {
              this._updateCalculated(entity, undefined);

              this.entities[entity.id] = undefined;
            });
          },
          revert: function revert(id) {
            var baseEntity = this.base().entities[id];
            var headEntity = this.entities[id];
            if (headEntity === baseEntity) return this;
            return this.update(function () {
              this._updateCalculated(headEntity, baseEntity);

              delete this.entities[id];
            });
          },
          update: function update() {
            var graph = this.frozen ? coreGraph(this, true) : this;

            for (var i = 0; i < arguments.length; i++) {
              arguments[i].call(graph, graph);
            }

            if (this.frozen) graph.frozen = true;
            return graph;
          },
          // Obliterates any existing entities
          load: function load(entities) {
            var base = this.base();
            this.entities = Object.create(base.entities);

            for (var i in entities) {
              this.entities[i] = entities[i];

              this._updateCalculated(base.entities[i], this.entities[i]);
            }

            return this;
          }
        };

        function osmTurn(turn) {
          if (!(this instanceof osmTurn)) {
            return new osmTurn(turn);
          }

          Object.assign(this, turn);
        }
        function osmIntersection(graph, startVertexId, maxDistance) {
          maxDistance = maxDistance || 30; // in meters

          var vgraph = coreGraph(); // virtual graph

          var i, j, k;

          function memberOfRestriction(entity) {
            return graph.parentRelations(entity).some(function (r) {
              return r.isRestriction();
            });
          }

          function isRoad(way) {
            if (way.isArea() || way.isDegenerate()) return false;
            var roads = {
              'motorway': true,
              'motorway_link': true,
              'trunk': true,
              'trunk_link': true,
              'primary': true,
              'primary_link': true,
              'secondary': true,
              'secondary_link': true,
              'tertiary': true,
              'tertiary_link': true,
              'residential': true,
              'unclassified': true,
              'living_street': true,
              'service': true,
              'road': true,
              'track': true
            };
            return roads[way.tags.highway];
          }

          var startNode = graph.entity(startVertexId);
          var checkVertices = [startNode];
          var checkWays;
          var vertices = [];
          var vertexIds = [];
          var vertex;
          var ways = [];
          var wayIds = [];
          var way;
          var nodes = [];
          var node;
          var parents = [];
          var parent; // `actions` will store whatever actions must be performed to satisfy
          // preconditions for adding a turn restriction to this intersection.
          //  - Remove any existing degenerate turn restrictions (missing from/to, etc)
          //  - Reverse oneways so that they are drawn in the forward direction
          //  - Split ways on key vertices

          var actions = []; // STEP 1:  walk the graph outwards from starting vertex to search
          //  for more key vertices and ways to include in the intersection..

          while (checkVertices.length) {
            vertex = checkVertices.pop(); // check this vertex for parent ways that are roads

            checkWays = graph.parentWays(vertex);
            var hasWays = false;

            for (i = 0; i < checkWays.length; i++) {
              way = checkWays[i];
              if (!isRoad(way) && !memberOfRestriction(way)) continue;
              ways.push(way); // it's a road, or it's already in a turn restriction

              hasWays = true; // check the way's children for more key vertices

              nodes = utilArrayUniq(graph.childNodes(way));

              for (j = 0; j < nodes.length; j++) {
                node = nodes[j];
                if (node === vertex) continue; // same thing

                if (vertices.indexOf(node) !== -1) continue; // seen it already

                if (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) continue; // too far from start
                // a key vertex will have parents that are also roads

                var hasParents = false;
                parents = graph.parentWays(node);

                for (k = 0; k < parents.length; k++) {
                  parent = parents[k];
                  if (parent === way) continue; // same thing

                  if (ways.indexOf(parent) !== -1) continue; // seen it already

                  if (!isRoad(parent)) continue; // not a road

                  hasParents = true;
                  break;
                }

                if (hasParents) {
                  checkVertices.push(node);
                }
              }
            }

            if (hasWays) {
              vertices.push(vertex);
            }
          }

          vertices = utilArrayUniq(vertices);
          ways = utilArrayUniq(ways); // STEP 2:  Build a virtual graph containing only the entities in the intersection..
          // Everything done after this step should act on the virtual graph
          // Any actions that must be performed later to the main graph go in `actions` array

          ways.forEach(function (way) {
            graph.childNodes(way).forEach(function (node) {
              vgraph = vgraph.replace(node);
            });
            vgraph = vgraph.replace(way);
            graph.parentRelations(way).forEach(function (relation) {
              if (relation.isRestriction()) {
                if (relation.isValidRestriction(graph)) {
                  vgraph = vgraph.replace(relation);
                } else if (relation.isComplete(graph)) {
                  actions.push(actionDeleteRelation(relation.id));
                }
              }
            });
          }); // STEP 3:  Force all oneways to be drawn in the forward direction

          ways.forEach(function (w) {
            var way = vgraph.entity(w.id);

            if (way.tags.oneway === '-1') {
              var action = actionReverse(way.id, {
                reverseOneway: true
              });
              actions.push(action);
              vgraph = action(vgraph);
            }
          }); // STEP 4:  Split ways on key vertices

          var origCount = osmEntity.id.next.way;
          vertices.forEach(function (v) {
            // This is an odd way to do it, but we need to find all the ways that
            // will be split here, then split them one at a time to ensure that these
            // actions can be replayed on the main graph exactly in the same order.
            // (It is unintuitive, but the order of ways returned from graph.parentWays()
            // is arbitrary, depending on how the main graph and vgraph were built)
            var splitAll = actionSplit([v.id]).keepHistoryOn('first');

            if (!splitAll.disabled(vgraph)) {
              splitAll.ways(vgraph).forEach(function (way) {
                var splitOne = actionSplit([v.id]).limitWays([way.id]).keepHistoryOn('first');
                actions.push(splitOne);
                vgraph = splitOne(vgraph);
              });
            }
          }); // In here is where we should also split the intersection at nearby junction.
          //   for https://github.com/mapbox/iD-internal/issues/31
          // nearbyVertices.forEach(function(v) {
          // });
          // Reasons why we reset the way id count here:
          //  1. Continuity with way ids created by the splits so that we can replay
          //     these actions later if the user decides to create a turn restriction
          //  2. Avoids churning way ids just by hovering over a vertex
          //     and displaying the turn restriction editor

          osmEntity.id.next.way = origCount; // STEP 5:  Update arrays to point to vgraph entities

          vertexIds = vertices.map(function (v) {
            return v.id;
          });
          vertices = [];
          ways = [];
          vertexIds.forEach(function (id) {
            var vertex = vgraph.entity(id);
            var parents = vgraph.parentWays(vertex);
            vertices.push(vertex);
            ways = ways.concat(parents);
          });
          vertices = utilArrayUniq(vertices);
          ways = utilArrayUniq(ways);
          vertexIds = vertices.map(function (v) {
            return v.id;
          });
          wayIds = ways.map(function (w) {
            return w.id;
          }); // STEP 6:  Update the ways with some metadata that will be useful for
          // walking the intersection graph later and rendering turn arrows.

          function withMetadata(way, vertexIds) {
            var __oneWay = way.isOneWay(); // which affixes are key vertices?


            var __first = vertexIds.indexOf(way.first()) !== -1;

            var __last = vertexIds.indexOf(way.last()) !== -1; // what roles is this way eligible for?


            var __via = __first && __last;

            var __from = __first && !__oneWay || __last;

            var __to = __first || __last && !__oneWay;

            return way.update({
              __first: __first,
              __last: __last,
              __from: __from,
              __via: __via,
              __to: __to,
              __oneWay: __oneWay
            });
          }

          ways = [];
          wayIds.forEach(function (id) {
            var way = withMetadata(vgraph.entity(id), vertexIds);
            vgraph = vgraph.replace(way);
            ways.push(way);
          }); // STEP 7:  Simplify - This is an iterative process where we:
          //  1. Find trivial vertices with only 2 parents
          //  2. trim off the leaf way from those vertices and remove from vgraph

          var keepGoing;
          var removeWayIds = [];
          var removeVertexIds = [];

          do {
            keepGoing = false;
            checkVertices = vertexIds.slice();

            for (i = 0; i < checkVertices.length; i++) {
              var vertexId = checkVertices[i];
              vertex = vgraph.hasEntity(vertexId);

              if (!vertex) {
                if (vertexIds.indexOf(vertexId) !== -1) {
                  vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
                }

                removeVertexIds.push(vertexId);
                continue;
              }

              parents = vgraph.parentWays(vertex);

              if (parents.length < 3) {
                if (vertexIds.indexOf(vertexId) !== -1) {
                  vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
                }
              }

              if (parents.length === 2) {
                // vertex with 2 parents is trivial
                var a = parents[0];
                var b = parents[1];
                var aIsLeaf = a && !a.__via;
                var bIsLeaf = b && !b.__via;
                var leaf, survivor;

                if (aIsLeaf && !bIsLeaf) {
                  leaf = a;
                  survivor = b;
                } else if (!aIsLeaf && bIsLeaf) {
                  leaf = b;
                  survivor = a;
                }

                if (leaf && survivor) {
                  survivor = withMetadata(survivor, vertexIds); // update survivor way

                  vgraph = vgraph.replace(survivor).remove(leaf); // update graph

                  removeWayIds.push(leaf.id);
                  keepGoing = true;
                }
              }

              parents = vgraph.parentWays(vertex);

              if (parents.length < 2) {
                // vertex is no longer a key vertex
                if (vertexIds.indexOf(vertexId) !== -1) {
                  vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
                }

                removeVertexIds.push(vertexId);
                keepGoing = true;
              }

              if (parents.length < 1) {
                // vertex is no longer attached to anything
                vgraph = vgraph.remove(vertex);
              }
            }
          } while (keepGoing);

          vertices = vertices.filter(function (vertex) {
            return removeVertexIds.indexOf(vertex.id) === -1;
          }).map(function (vertex) {
            return vgraph.entity(vertex.id);
          });
          ways = ways.filter(function (way) {
            return removeWayIds.indexOf(way.id) === -1;
          }).map(function (way) {
            return vgraph.entity(way.id);
          }); // OK!  Here is our intersection..

          var intersection = {
            graph: vgraph,
            actions: actions,
            vertices: vertices,
            ways: ways
          }; // Get all the valid turns through this intersection given a starting way id.
          // This operates on the virtual graph for everything.
          //
          // Basically, walk through all possible paths from starting way,
          //   honoring the existing turn restrictions as we go (watch out for loops!)
          //
          // For each path found, generate and return a `osmTurn` datastructure.
          //

          intersection.turns = function (fromWayId, maxViaWay) {
            if (!fromWayId) return [];
            if (!maxViaWay) maxViaWay = 0;
            var vgraph = intersection.graph;
            var keyVertexIds = intersection.vertices.map(function (v) {
              return v.id;
            });
            var start = vgraph.entity(fromWayId);
            if (!start || !(start.__from || start.__via)) return []; // maxViaWay=0   from-*-to              (0 vias)
            // maxViaWay=1   from-*-via-*-to        (1 via max)
            // maxViaWay=2   from-*-via-*-via-*-to  (2 vias max)

            var maxPathLength = maxViaWay * 2 + 3;
            var turns = [];
            step(start);
            return turns; // traverse the intersection graph and find all the valid paths

            function step(entity, currPath, currRestrictions, matchedRestriction) {
              currPath = (currPath || []).slice(); // shallow copy

              if (currPath.length >= maxPathLength) return;
              currPath.push(entity.id);
              currRestrictions = (currRestrictions || []).slice(); // shallow copy

              var i, j;

              if (entity.type === 'node') {
                var parents = vgraph.parentWays(entity);
                var nextWays = []; // which ways can we step into?

                for (i = 0; i < parents.length; i++) {
                  var way = parents[i]; // if next way is a oneway incoming to this vertex, skip

                  if (way.__oneWay && way.nodes[0] !== entity.id) continue; // if we have seen it before (allowing for an initial u-turn), skip

                  if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) continue; // Check all "current" restrictions (where we've already walked the `FROM`)

                  var restrict = null;

                  for (j = 0; j < currRestrictions.length; j++) {
                    var restriction = currRestrictions[j];
                    var f = restriction.memberByRole('from');
                    var v = restriction.membersByRole('via');
                    var t = restriction.memberByRole('to');
                    var isOnly = /^only_/.test(restriction.tags.restriction); // Does the current path match this turn restriction?

                    var matchesFrom = f.id === fromWayId;
                    var matchesViaTo = false;
                    var isAlongOnlyPath = false;

                    if (t.id === way.id) {
                      // match TO
                      if (v.length === 1 && v[0].type === 'node') {
                        // match VIA node
                        matchesViaTo = v[0].id === entity.id && (matchesFrom && currPath.length === 2 || !matchesFrom && currPath.length > 2);
                      } else {
                        // match all VIA ways
                        var pathVias = [];

                        for (k = 2; k < currPath.length; k += 2) {
                          // k = 2 skips FROM
                          pathVias.push(currPath[k]); // (path goes way-node-way...)
                        }

                        var restrictionVias = [];

                        for (k = 0; k < v.length; k++) {
                          if (v[k].type === 'way') {
                            restrictionVias.push(v[k].id);
                          }
                        }

                        var diff = utilArrayDifference(pathVias, restrictionVias);
                        matchesViaTo = !diff.length;
                      }
                    } else if (isOnly) {
                      for (k = 0; k < v.length; k++) {
                        // way doesn't match TO, but is one of the via ways along the path of an "only"
                        if (v[k].type === 'way' && v[k].id === way.id) {
                          isAlongOnlyPath = true;
                          break;
                        }
                      }
                    }

                    if (matchesViaTo) {
                      if (isOnly) {
                        restrict = {
                          id: restriction.id,
                          direct: matchesFrom,
                          from: f.id,
                          only: true,
                          end: true
                        };
                      } else {
                        restrict = {
                          id: restriction.id,
                          direct: matchesFrom,
                          from: f.id,
                          no: true,
                          end: true
                        };
                      }
                    } else {
                      // indirect - caused by a different nearby restriction
                      if (isAlongOnlyPath) {
                        restrict = {
                          id: restriction.id,
                          direct: false,
                          from: f.id,
                          only: true,
                          end: false
                        };
                      } else if (isOnly) {
                        restrict = {
                          id: restriction.id,
                          direct: false,
                          from: f.id,
                          no: true,
                          end: true
                        };
                      }
                    } // stop looking if we find a "direct" restriction (matching FROM, VIA, TO)


                    if (restrict && restrict.direct) break;
                  }

                  nextWays.push({
                    way: way,
                    restrict: restrict
                  });
                }

                nextWays.forEach(function (nextWay) {
                  step(nextWay.way, currPath, currRestrictions, nextWay.restrict);
                });
              } else {
                // entity.type === 'way'
                if (currPath.length >= 3) {
                  // this is a "complete" path..
                  var turnPath = currPath.slice(); // shallow copy
                  // an indirect restriction - only include the partial path (starting at FROM)

                  if (matchedRestriction && matchedRestriction.direct === false) {
                    for (i = 0; i < turnPath.length; i++) {
                      if (turnPath[i] === matchedRestriction.from) {
                        turnPath = turnPath.slice(i);
                        break;
                      }
                    }
                  }

                  var turn = pathToTurn(turnPath);

                  if (turn) {
                    if (matchedRestriction) {
                      turn.restrictionID = matchedRestriction.id;
                      turn.no = matchedRestriction.no;
                      turn.only = matchedRestriction.only;
                      turn.direct = matchedRestriction.direct;
                    }

                    turns.push(osmTurn(turn));
                  }

                  if (currPath[0] === currPath[2]) return; // if we made a u-turn - stop here
                }

                if (matchedRestriction && matchedRestriction.end) return; // don't advance any further
                // which nodes can we step into?

                var n1 = vgraph.entity(entity.first());
                var n2 = vgraph.entity(entity.last());
                var dist = geoSphericalDistance(n1.loc, n2.loc);
                var nextNodes = [];

                if (currPath.length > 1) {
                  if (dist > maxDistance) return; // the next node is too far

                  if (!entity.__via) return; // this way is a leaf / can't be a via
                }

                if (!entity.__oneWay && // bidirectional..
                keyVertexIds.indexOf(n1.id) !== -1 && // key vertex..
                currPath.indexOf(n1.id) === -1) {
                  // haven't seen it yet..
                  nextNodes.push(n1); // can advance to first node
                }

                if (keyVertexIds.indexOf(n2.id) !== -1 && // key vertex..
                currPath.indexOf(n2.id) === -1) {
                  // haven't seen it yet..
                  nextNodes.push(n2); // can advance to last node
                }

                nextNodes.forEach(function (nextNode) {
                  // gather restrictions FROM this way
                  var fromRestrictions = vgraph.parentRelations(entity).filter(function (r) {
                    if (!r.isRestriction()) return false;
                    var f = r.memberByRole('from');
                    if (!f || f.id !== entity.id) return false;
                    var isOnly = /^only_/.test(r.tags.restriction);
                    if (!isOnly) return true; // `only_` restrictions only matter along the direction of the VIA - #4849

                    var isOnlyVia = false;
                    var v = r.membersByRole('via');

                    if (v.length === 1 && v[0].type === 'node') {
                      // via node
                      isOnlyVia = v[0].id === nextNode.id;
                    } else {
                      // via way(s)
                      for (var i = 0; i < v.length; i++) {
                        if (v[i].type !== 'way') continue;
                        var viaWay = vgraph.entity(v[i].id);

                        if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
                          isOnlyVia = true;
                          break;
                        }
                      }
                    }

                    return isOnlyVia;
                  });
                  step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
                });
              }
            } // assumes path is alternating way-node-way of odd length


            function pathToTurn(path) {
              if (path.length < 3) return;
              var fromWayId, fromNodeId, fromVertexId;
              var toWayId, toNodeId, toVertexId;
              var viaWayIds, viaNodeId, isUturn;
              fromWayId = path[0];
              toWayId = path[path.length - 1];

              if (path.length === 3 && fromWayId === toWayId) {
                // u turn
                var way = vgraph.entity(fromWayId);
                if (way.__oneWay) return null;
                isUturn = true;
                viaNodeId = fromVertexId = toVertexId = path[1];
                fromNodeId = toNodeId = adjacentNode(fromWayId, viaNodeId);
              } else {
                isUturn = false;
                fromVertexId = path[1];
                fromNodeId = adjacentNode(fromWayId, fromVertexId);
                toVertexId = path[path.length - 2];
                toNodeId = adjacentNode(toWayId, toVertexId);

                if (path.length === 3) {
                  viaNodeId = path[1];
                } else {
                  viaWayIds = path.filter(function (entityId) {
                    return entityId[0] === 'w';
                  });
                  viaWayIds = viaWayIds.slice(1, viaWayIds.length - 1); // remove first, last
                }
              }

              return {
                key: path.join('_'),
                path: path,
                from: {
                  node: fromNodeId,
                  way: fromWayId,
                  vertex: fromVertexId
                },
                via: {
                  node: viaNodeId,
                  ways: viaWayIds
                },
                to: {
                  node: toNodeId,
                  way: toWayId,
                  vertex: toVertexId
                },
                u: isUturn
              };

              function adjacentNode(wayId, affixId) {
                var nodes = vgraph.entity(wayId).nodes;
                return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
              }
            }
          };

          return intersection;
        }
        function osmInferRestriction(graph, turn, projection) {
          var fromWay = graph.entity(turn.from.way);
          var fromNode = graph.entity(turn.from.node);
          var fromVertex = graph.entity(turn.from.vertex);
          var toWay = graph.entity(turn.to.way);
          var toNode = graph.entity(turn.to.node);
          var toVertex = graph.entity(turn.to.vertex);
          var fromOneWay = fromWay.tags.oneway === 'yes';
          var toOneWay = toWay.tags.oneway === 'yes';
          var angle = (geoAngle(fromVertex, fromNode, projection) - geoAngle(toVertex, toNode, projection)) * 180 / Math.PI;

          while (angle < 0) {
            angle += 360;
          }

          if (fromNode === toNode) {
            return 'no_u_turn';
          }

          if ((angle < 23 || angle > 336) && fromOneWay && toOneWay) {
            return 'no_u_turn'; // wider tolerance for u-turn if both ways are oneway
          }

          if ((angle < 40 || angle > 319) && fromOneWay && toOneWay && turn.from.vertex !== turn.to.vertex) {
            return 'no_u_turn'; // even wider tolerance for u-turn if there is a via way (from !== to)
          }

          if (angle < 158) {
            return 'no_right_turn';
          }

          if (angle > 202) {
            return 'no_left_turn';
          }

          return 'no_straight_on';
        }

        function actionMergePolygon(ids, newRelationId) {
          function groupEntities(graph) {
            var entities = ids.map(function (id) {
              return graph.entity(id);
            });
            var geometryGroups = utilArrayGroupBy(entities, function (entity) {
              if (entity.type === 'way' && entity.isClosed()) {
                return 'closedWay';
              } else if (entity.type === 'relation' && entity.isMultipolygon()) {
                return 'multipolygon';
              } else {
                return 'other';
              }
            });
            return Object.assign({
              closedWay: [],
              multipolygon: [],
              other: []
            }, geometryGroups);
          }

          var action = function action(graph) {
            var entities = groupEntities(graph); // An array representing all the polygons that are part of the multipolygon.
            //
            // Each element is itself an array of objects with an id property, and has a
            // locs property which is an array of the locations forming the polygon.

            var polygons = entities.multipolygon.reduce(function (polygons, m) {
              return polygons.concat(osmJoinWays(m.members, graph));
            }, []).concat(entities.closedWay.map(function (d) {
              var member = [{
                id: d.id
              }];
              member.nodes = graph.childNodes(d);
              return member;
            })); // contained is an array of arrays of boolean values,
            // where contained[j][k] is true iff the jth way is
            // contained by the kth way.

            var contained = polygons.map(function (w, i) {
              return polygons.map(function (d, n) {
                if (i === n) return null;
                return geoPolygonContainsPolygon(d.nodes.map(function (n) {
                  return n.loc;
                }), w.nodes.map(function (n) {
                  return n.loc;
                }));
              });
            }); // Sort all polygons as either outer or inner ways

            var members = [];
            var outer = true;

            while (polygons.length) {
              extractUncontained(polygons);
              polygons = polygons.filter(isContained);
              contained = contained.filter(isContained).map(filterContained);
            }

            function isContained(d, i) {
              return contained[i].some(function (val) {
                return val;
              });
            }

            function filterContained(d) {
              return d.filter(isContained);
            }

            function extractUncontained(polygons) {
              polygons.forEach(function (d, i) {
                if (!isContained(d, i)) {
                  d.forEach(function (member) {
                    members.push({
                      type: 'way',
                      id: member.id,
                      role: outer ? 'outer' : 'inner'
                    });
                  });
                }
              });
              outer = !outer;
            } // Move all tags to one relation


            var relation = entities.multipolygon[0] || osmRelation({
              id: newRelationId,
              tags: {
                type: 'multipolygon'
              }
            });
            entities.multipolygon.slice(1).forEach(function (m) {
              relation = relation.mergeTags(m.tags);
              graph = graph.remove(m);
            });
            entities.closedWay.forEach(function (way) {
              function isThisOuter(m) {
                return m.id === way.id && m.role !== 'inner';
              }

              if (members.some(isThisOuter)) {
                relation = relation.mergeTags(way.tags);
                graph = graph.replace(way.update({
                  tags: {}
                }));
              }
            });
            return graph.replace(relation.update({
              members: members,
              tags: utilObjectOmit(relation.tags, ['area'])
            }));
          };

          action.disabled = function (graph) {
            var entities = groupEntities(graph);

            if (entities.other.length > 0 || entities.closedWay.length + entities.multipolygon.length < 2) {
              return 'not_eligible';
            }

            if (!entities.multipolygon.every(function (r) {
              return r.isComplete(graph);
            })) {
              return 'incomplete_relation';
            }

            if (!entities.multipolygon.length) {
              var sharedMultipolygons = [];
              entities.closedWay.forEach(function (way, i) {
                if (i === 0) {
                  sharedMultipolygons = graph.parentMultipolygons(way);
                } else {
                  sharedMultipolygons = utilArrayIntersection(sharedMultipolygons, graph.parentMultipolygons(way));
                }
              });
              sharedMultipolygons = sharedMultipolygons.filter(function (relation) {
                return relation.members.length === entities.closedWay.length;
              });

              if (sharedMultipolygons.length) {
                // don't create a new multipolygon if it'd be redundant
                return 'not_eligible';
              }
            } else if (entities.closedWay.some(function (way) {
              return utilArrayIntersection(graph.parentMultipolygons(way), entities.multipolygon).length;
            })) {
              // don't add a way to a multipolygon again if it's already a member
              return 'not_eligible';
            }
          };

          return action;
        }

        var FORCED$2 = descriptors && fails(function () {
          // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
          return Object.getOwnPropertyDescriptor(RegExp.prototype, 'flags').get.call({ dotAll: true, sticky: true }) !== 'sy';
        });

        // `RegExp.prototype.flags` getter
        // https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
        if (FORCED$2) objectDefineProperty.f(RegExp.prototype, 'flags', {
          configurable: true,
          get: regexpFlags
        });

        var fastDeepEqual = function equal(a, b) {
          if (a === b) return true;

          if (a && b && _typeof(a) == 'object' && _typeof(b) == 'object') {
            if (a.constructor !== b.constructor) return false;
            var length, i, keys;

            if (Array.isArray(a)) {
              length = a.length;
              if (length != b.length) return false;

              for (i = length; i-- !== 0;) {
                if (!equal(a[i], b[i])) return false;
              }

              return true;
            }

            if (a.constructor === RegExp) return a.source === b.source && a.flags === b.flags;
            if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
            if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();
            keys = Object.keys(a);
            length = keys.length;
            if (length !== Object.keys(b).length) return false;

            for (i = length; i-- !== 0;) {
              if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
            }

            for (i = length; i-- !== 0;) {
              var key = keys[i];
              if (!equal(a[key], b[key])) return false;
            }

            return true;
          } // true if both NaN, false otherwise


          return a !== a && b !== b;
        };

        // J. W. Hunt and M. D. McIlroy, An algorithm for differential buffer
        // comparison, Bell Telephone Laboratories CSTR #41 (1976)
        // http://www.cs.dartmouth.edu/~doug/
        // https://en.wikipedia.org/wiki/Longest_common_subsequence_problem
        //
        // Expects two arrays, finds longest common sequence

        function LCS(buffer1, buffer2) {
          var equivalenceClasses = {};

          for (var j = 0; j < buffer2.length; j++) {
            var item = buffer2[j];

            if (equivalenceClasses[item]) {
              equivalenceClasses[item].push(j);
            } else {
              equivalenceClasses[item] = [j];
            }
          }

          var NULLRESULT = {
            buffer1index: -1,
            buffer2index: -1,
            chain: null
          };
          var candidates = [NULLRESULT];

          for (var i = 0; i < buffer1.length; i++) {
            var _item = buffer1[i];
            var buffer2indices = equivalenceClasses[_item] || [];
            var r = 0;
            var c = candidates[0];

            for (var jx = 0; jx < buffer2indices.length; jx++) {
              var _j = buffer2indices[jx];
              var s = void 0;

              for (s = r; s < candidates.length; s++) {
                if (candidates[s].buffer2index < _j && (s === candidates.length - 1 || candidates[s + 1].buffer2index > _j)) {
                  break;
                }
              }

              if (s < candidates.length) {
                var newCandidate = {
                  buffer1index: i,
                  buffer2index: _j,
                  chain: candidates[s]
                };

                if (r === candidates.length) {
                  candidates.push(c);
                } else {
                  candidates[r] = c;
                }

                r = s + 1;
                c = newCandidate;

                if (r === candidates.length) {
                  break; // no point in examining further (j)s
                }
              }
            }

            candidates[r] = c;
          } // At this point, we know the LCS: it's in the reverse of the
          // linked-list through .chain of candidates[candidates.length - 1].


          return candidates[candidates.length - 1];
        } // We apply the LCS to build a 'comm'-style picture of the
        // offsets and lengths of mismatched chunks in the input
        // buffers. This is used by diff3MergeRegions.


        function diffIndices(buffer1, buffer2) {
          var lcs = LCS(buffer1, buffer2);
          var result = [];
          var tail1 = buffer1.length;
          var tail2 = buffer2.length;

          for (var candidate = lcs; candidate !== null; candidate = candidate.chain) {
            var mismatchLength1 = tail1 - candidate.buffer1index - 1;
            var mismatchLength2 = tail2 - candidate.buffer2index - 1;
            tail1 = candidate.buffer1index;
            tail2 = candidate.buffer2index;

            if (mismatchLength1 || mismatchLength2) {
              result.push({
                buffer1: [tail1 + 1, mismatchLength1],
                buffer1Content: buffer1.slice(tail1 + 1, tail1 + 1 + mismatchLength1),
                buffer2: [tail2 + 1, mismatchLength2],
                buffer2Content: buffer2.slice(tail2 + 1, tail2 + 1 + mismatchLength2)
              });
            }
          }

          result.reverse();
          return result;
        } // We apply the LCS to build a JSON representation of a
        // independently derived from O, returns a fairly complicated
        // internal representation of merge decisions it's taken. The
        // interested reader may wish to consult
        //
        // Sanjeev Khanna, Keshav Kunal, and Benjamin C. Pierce.
        // 'A Formal Investigation of ' In Arvind and Prasad,
        // editors, Foundations of Software Technology and Theoretical
        // Computer Science (FSTTCS), December 2007.
        //
        // (http://www.cis.upenn.edu/~bcpierce/papers/diff3-short.pdf)
        //


        function diff3MergeRegions(a, o, b) {
          // "hunks" are array subsets where `a` or `b` are different from `o`
          // https://www.gnu.org/software/diffutils/manual/html_node/diff3-Hunks.html
          var hunks = [];

          function addHunk(h, ab) {
            hunks.push({
              ab: ab,
              oStart: h.buffer1[0],
              oLength: h.buffer1[1],
              // length of o to remove
              abStart: h.buffer2[0],
              abLength: h.buffer2[1] // length of a/b to insert
              // abContent: (ab === 'a' ? a : b).slice(h.buffer2[0], h.buffer2[0] + h.buffer2[1])

            });
          }

          diffIndices(o, a).forEach(function (item) {
            return addHunk(item, 'a');
          });
          diffIndices(o, b).forEach(function (item) {
            return addHunk(item, 'b');
          });
          hunks.sort(function (x, y) {
            return x.oStart - y.oStart;
          });
          var results = [];
          var currOffset = 0;

          function advanceTo(endOffset) {
            if (endOffset > currOffset) {
              results.push({
                stable: true,
                buffer: 'o',
                bufferStart: currOffset,
                bufferLength: endOffset - currOffset,
                bufferContent: o.slice(currOffset, endOffset)
              });
              currOffset = endOffset;
            }
          }

          while (hunks.length) {
            var hunk = hunks.shift();
            var regionStart = hunk.oStart;
            var regionEnd = hunk.oStart + hunk.oLength;
            var regionHunks = [hunk];
            advanceTo(regionStart); // Try to pull next overlapping hunk into this region

            while (hunks.length) {
              var nextHunk = hunks[0];
              var nextHunkStart = nextHunk.oStart;
              if (nextHunkStart > regionEnd) break; // no overlap

              regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
              regionHunks.push(hunks.shift());
            }

            if (regionHunks.length === 1) {
              // Only one hunk touches this region, meaning that there is no conflict here.
              // Either `a` or `b` is inserting into a region of `o` unchanged by the other.
              if (hunk.abLength > 0) {
                var buffer = hunk.ab === 'a' ? a : b;
                results.push({
                  stable: true,
                  buffer: hunk.ab,
                  bufferStart: hunk.abStart,
                  bufferLength: hunk.abLength,
                  bufferContent: buffer.slice(hunk.abStart, hunk.abStart + hunk.abLength)
                });
              }
            } else {
              // A true a/b conflict. Determine the bounds involved from `a`, `o`, and `b`.
              // Effectively merge all the `a` hunks into one giant hunk, then do the
              // same for the `b` hunks; then, correct for skew in the regions of `o`
              // that each side changed, and report appropriate spans for the three sides.
              var bounds = {
                a: [a.length, -1, o.length, -1],
                b: [b.length, -1, o.length, -1]
              };

              while (regionHunks.length) {
                hunk = regionHunks.shift();
                var oStart = hunk.oStart;
                var oEnd = oStart + hunk.oLength;
                var abStart = hunk.abStart;
                var abEnd = abStart + hunk.abLength;
                var _b = bounds[hunk.ab];
                _b[0] = Math.min(abStart, _b[0]);
                _b[1] = Math.max(abEnd, _b[1]);
                _b[2] = Math.min(oStart, _b[2]);
                _b[3] = Math.max(oEnd, _b[3]);
              }

              var aStart = bounds.a[0] + (regionStart - bounds.a[2]);
              var aEnd = bounds.a[1] + (regionEnd - bounds.a[3]);
              var bStart = bounds.b[0] + (regionStart - bounds.b[2]);
              var bEnd = bounds.b[1] + (regionEnd - bounds.b[3]);
              var result = {
                stable: false,
                aStart: aStart,
                aLength: aEnd - aStart,
                aContent: a.slice(aStart, aEnd),
                oStart: regionStart,
                oLength: regionEnd - regionStart,
                oContent: o.slice(regionStart, regionEnd),
                bStart: bStart,
                bLength: bEnd - bStart,
                bContent: b.slice(bStart, bEnd)
              };
              results.push(result);
            }

            currOffset = regionEnd;
          }

          advanceTo(o.length);
          return results;
        } // Applies the output of diff3MergeRegions to actually
        // construct the merged buffer; the returned result alternates
        // between 'ok' and 'conflict' blocks.
        // A "false conflict" is where `a` and `b` both change the same from `o`


        function diff3Merge(a, o, b, options) {
          var defaults = {
            excludeFalseConflicts: true,
            stringSeparator: /\s+/
          };
          options = Object.assign(defaults, options);
          var aString = typeof a === 'string';
          var oString = typeof o === 'string';
          var bString = typeof b === 'string';
          if (aString) a = a.split(options.stringSeparator);
          if (oString) o = o.split(options.stringSeparator);
          if (bString) b = b.split(options.stringSeparator);
          var results = [];
          var regions = diff3MergeRegions(a, o, b);
          var okBuffer = [];

          function flushOk() {
            if (okBuffer.length) {
              results.push({
                ok: okBuffer
              });
            }

            okBuffer = [];
          }

          function isFalseConflict(a, b) {
            if (a.length !== b.length) return false;

            for (var i = 0; i < a.length; i++) {
              if (a[i] !== b[i]) return false;
            }

            return true;
          }

          regions.forEach(function (region) {
            if (region.stable) {
              var _okBuffer;

              (_okBuffer = okBuffer).push.apply(_okBuffer, _toConsumableArray(region.bufferContent));
            } else {
              if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
                var _okBuffer2;

                (_okBuffer2 = okBuffer).push.apply(_okBuffer2, _toConsumableArray(region.aContent));
              } else {
                flushOk();
                results.push({
                  conflict: {
                    a: region.aContent,
                    aIndex: region.aStart,
                    o: region.oContent,
                    oIndex: region.oStart,
                    b: region.bContent,
                    bIndex: region.bStart
                  }
                });
              }
            }
          });
          flushOk();
          return results;
        }

        function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
          discardTags = discardTags || {};
          var _option = 'safe'; // 'safe', 'force_local', 'force_remote'

          var _conflicts = [];

          function user(d) {
            return typeof formatUser === 'function' ? formatUser(d) : d;
          }

          function mergeLocation(remote, target) {
            function pointEqual(a, b) {
              var epsilon = 1e-6;
              return Math.abs(a[0] - b[0]) < epsilon && Math.abs(a[1] - b[1]) < epsilon;
            }

            if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
              return target;
            }

            if (_option === 'force_remote') {
              return target.update({
                loc: remote.loc
              });
            }

            _conflicts.push(_t('merge_remote_changes.conflict.location', {
              user: user(remote.user)
            }));

            return target;
          }

          function mergeNodes(base, remote, target) {
            if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
              return target;
            }

            if (_option === 'force_remote') {
              return target.update({
                nodes: remote.nodes
              });
            }

            var ccount = _conflicts.length;
            var o = base.nodes || [];
            var a = target.nodes || [];
            var b = remote.nodes || [];
            var nodes = [];
            var hunks = diff3Merge(a, o, b, {
              excludeFalseConflicts: true
            });

            for (var i = 0; i < hunks.length; i++) {
              var hunk = hunks[i];

              if (hunk.ok) {
                nodes.push.apply(nodes, hunk.ok);
              } else {
                // for all conflicts, we can assume c.a !== c.b
                // because `diff3Merge` called with `true` option to exclude false conflicts..
                var c = hunk.conflict;

                if (fastDeepEqual(c.o, c.a)) {
                  // only changed remotely
                  nodes.push.apply(nodes, c.b);
                } else if (fastDeepEqual(c.o, c.b)) {
                  // only changed locally
                  nodes.push.apply(nodes, c.a);
                } else {
                  // changed both locally and remotely
                  _conflicts.push(_t('merge_remote_changes.conflict.nodelist', {
                    user: user(remote.user)
                  }));

                  break;
                }
              }
            }

            return _conflicts.length === ccount ? target.update({
              nodes: nodes
            }) : target;
          }

          function mergeChildren(targetWay, children, updates, graph) {
            function isUsed(node, targetWay) {
              var hasInterestingParent = graph.parentWays(node).some(function (way) {
                return way.id !== targetWay.id;
              });
              return node.hasInterestingTags() || hasInterestingParent || graph.parentRelations(node).length > 0;
            }

            var ccount = _conflicts.length;

            for (var i = 0; i < children.length; i++) {
              var id = children[i];
              var node = graph.hasEntity(id); // remove unused childNodes..

              if (targetWay.nodes.indexOf(id) === -1) {
                if (node && !isUsed(node, targetWay)) {
                  updates.removeIds.push(id);
                }

                continue;
              } // restore used childNodes..


              var local = localGraph.hasEntity(id);
              var remote = remoteGraph.hasEntity(id);
              var target;

              if (_option === 'force_remote' && remote && remote.visible) {
                updates.replacements.push(remote);
              } else if (_option === 'force_local' && local) {
                target = osmEntity(local);

                if (remote) {
                  target = target.update({
                    version: remote.version
                  });
                }

                updates.replacements.push(target);
              } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
                target = osmEntity(local, {
                  version: remote.version
                });

                if (remote.visible) {
                  target = mergeLocation(remote, target);
                } else {
                  _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
                    user: user(remote.user)
                  }));
                }

                if (_conflicts.length !== ccount) break;
                updates.replacements.push(target);
              }
            }

            return targetWay;
          }

          function updateChildren(updates, graph) {
            for (var i = 0; i < updates.replacements.length; i++) {
              graph = graph.replace(updates.replacements[i]);
            }

            if (updates.removeIds.length) {
              graph = actionDeleteMultiple(updates.removeIds)(graph);
            }

            return graph;
          }

          function mergeMembers(remote, target) {
            if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
              return target;
            }

            if (_option === 'force_remote') {
              return target.update({
                members: remote.members
              });
            }

            _conflicts.push(_t('merge_remote_changes.conflict.memberlist', {
              user: user(remote.user)
            }));

            return target;
          }

          function mergeTags(base, remote, target) {
            if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
              return target;
            }

            if (_option === 'force_remote') {
              return target.update({
                tags: remote.tags
              });
            }

            var ccount = _conflicts.length;
            var o = base.tags || {};
            var a = target.tags || {};
            var b = remote.tags || {};
            var keys = utilArrayUnion(utilArrayUnion(Object.keys(o), Object.keys(a)), Object.keys(b)).filter(function (k) {
              return !discardTags[k];
            });
            var tags = Object.assign({}, a); // shallow copy

            var changed = false;

            for (var i = 0; i < keys.length; i++) {
              var k = keys[i];

              if (o[k] !== b[k] && a[k] !== b[k]) {
                // changed remotely..
                if (o[k] !== a[k]) {
                  // changed locally..
                  _conflicts.push(_t('merge_remote_changes.conflict.tags', {
                    tag: k,
                    local: a[k],
                    remote: b[k],
                    user: user(remote.user)
                  }));
                } else {
                  // unchanged locally, accept remote change..
                  if (b.hasOwnProperty(k)) {
                    tags[k] = b[k];
                  } else {
                    delete tags[k];
                  }

                  changed = true;
                }
              }
            }

            return changed && _conflicts.length === ccount ? target.update({
              tags: tags
            }) : target;
          } //  `graph.base()` is the common ancestor of the two graphs.
          //  `localGraph` contains user's edits up to saving
          //  `remoteGraph` contains remote edits to modified nodes
          //  `graph` must be a descendent of `localGraph` and may include
          //      some conflict resolution actions performed on it.
          //
          //                  --- ... --- `localGraph` -- ... -- `graph`
          //                 /
          //  `graph.base()` --- ... --- `remoteGraph`
          //


          var action = function action(graph) {
            var updates = {
              replacements: [],
              removeIds: []
            };
            var base = graph.base().entities[id];
            var local = localGraph.entity(id);
            var remote = remoteGraph.entity(id);
            var target = osmEntity(local, {
              version: remote.version
            }); // delete/undelete

            if (!remote.visible) {
              if (_option === 'force_remote') {
                return actionDeleteMultiple([id])(graph);
              } else if (_option === 'force_local') {
                if (target.type === 'way') {
                  target = mergeChildren(target, utilArrayUniq(local.nodes), updates, graph);
                  graph = updateChildren(updates, graph);
                }

                return graph.replace(target);
              } else {
                _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
                  user: user(remote.user)
                }));

                return graph; // do nothing
              }
            } // merge


            if (target.type === 'node') {
              target = mergeLocation(remote, target);
            } else if (target.type === 'way') {
              // pull in any child nodes that may not be present locally..
              graph.rebase(remoteGraph.childNodes(remote), [graph], false);
              target = mergeNodes(base, remote, target);
              target = mergeChildren(target, utilArrayUnion(local.nodes, remote.nodes), updates, graph);
            } else if (target.type === 'relation') {
              target = mergeMembers(remote, target);
            }

            target = mergeTags(base, remote, target);

            if (!_conflicts.length) {
              graph = updateChildren(updates, graph).replace(target);
            }

            return graph;
          };

          action.withOption = function (opt) {
            _option = opt;
            return action;
          };

          action.conflicts = function () {
            return _conflicts;
          };

          return action;
        }

        // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as

        function actionMove(moveIDs, tryDelta, projection, cache) {
          var _delta = tryDelta;

          function setupCache(graph) {
            function canMove(nodeID) {
              // Allow movement of any node that is in the selectedIDs list..
              if (moveIDs.indexOf(nodeID) !== -1) return true; // Allow movement of a vertex where 2 ways meet..

              var parents = graph.parentWays(graph.entity(nodeID));
              if (parents.length < 3) return true; // Restrict movement of a vertex where >2 ways meet, unless all parentWays are moving too..

              var parentsMoving = parents.every(function (way) {
                return cache.moving[way.id];
              });
              if (!parentsMoving) delete cache.moving[nodeID];
              return parentsMoving;
            }

            function cacheEntities(ids) {
              for (var i = 0; i < ids.length; i++) {
                var id = ids[i];
                if (cache.moving[id]) continue;
                cache.moving[id] = true;
                var entity = graph.hasEntity(id);
                if (!entity) continue;

                if (entity.type === 'node') {
                  cache.nodes.push(id);
                  cache.startLoc[id] = entity.loc;
                } else if (entity.type === 'way') {
                  cache.ways.push(id);
                  cacheEntities(entity.nodes);
                } else {
                  cacheEntities(entity.members.map(function (member) {
                    return member.id;
                  }));
                }
              }
            }

            function cacheIntersections(ids) {
              function isEndpoint(way, id) {
                return !way.isClosed() && !!way.affix(id);
              }

              for (var i = 0; i < ids.length; i++) {
                var id = ids[i]; // consider only intersections with 1 moved and 1 unmoved way.

                var childNodes = graph.childNodes(graph.entity(id));

                for (var j = 0; j < childNodes.length; j++) {
                  var node = childNodes[j];
                  var parents = graph.parentWays(node);
                  if (parents.length !== 2) continue;
                  var moved = graph.entity(id);
                  var unmoved = null;

                  for (var k = 0; k < parents.length; k++) {
                    var way = parents[k];

                    if (!cache.moving[way.id]) {
                      unmoved = way;
                      break;
                    }
                  }

                  if (!unmoved) continue; // exclude ways that are overly connected..

                  if (utilArrayIntersection(moved.nodes, unmoved.nodes).length > 2) continue;
                  if (moved.isArea() || unmoved.isArea()) continue;
                  cache.intersections.push({
                    nodeId: node.id,
                    movedId: moved.id,
                    unmovedId: unmoved.id,
                    movedIsEP: isEndpoint(moved, node.id),
                    unmovedIsEP: isEndpoint(unmoved, node.id)
                  });
                }
              }
            }

            if (!cache) {
              cache = {};
            }

            if (!cache.ok) {
              cache.moving = {};
              cache.intersections = [];
              cache.replacedVertex = {};
              cache.startLoc = {};
              cache.nodes = [];
              cache.ways = [];
              cacheEntities(moveIDs);
              cacheIntersections(cache.ways);
              cache.nodes = cache.nodes.filter(canMove);
              cache.ok = true;
            }
          } // Place a vertex where the moved vertex used to be, to preserve way shape..
          //
          //  Start:
          //      b ---- e
          //     / \
          //    /   \
          //   /     \
          //  a       c
          //
          //      *               node '*' added to preserve shape
          //     / \
          //    /   b ---- e      way `b,e` moved here:
          //   /     \
          //  a       c
          //
          //


          function replaceMovedVertex(nodeId, wayId, graph, delta) {
            var way = graph.entity(wayId);
            var moved = graph.entity(nodeId);
            var movedIndex = way.nodes.indexOf(nodeId);
            var len, prevIndex, nextIndex;

            if (way.isClosed()) {
              len = way.nodes.length - 1;
              prevIndex = (movedIndex + len - 1) % len;
              nextIndex = (movedIndex + len + 1) % len;
            } else {
              len = way.nodes.length;
              prevIndex = movedIndex - 1;
              nextIndex = movedIndex + 1;
            }

            var prev = graph.hasEntity(way.nodes[prevIndex]);
            var next = graph.hasEntity(way.nodes[nextIndex]); // Don't add orig vertex at endpoint..

            if (!prev || !next) return graph;
            var key = wayId + '_' + nodeId;
            var orig = cache.replacedVertex[key];

            if (!orig) {
              orig = osmNode();
              cache.replacedVertex[key] = orig;
              cache.startLoc[orig.id] = cache.startLoc[nodeId];
            }

            var start, end;

            if (delta) {
              start = projection(cache.startLoc[nodeId]);
              end = projection.invert(geoVecAdd(start, delta));
            } else {
              end = cache.startLoc[nodeId];
            }

            orig = orig.move(end);
            var angle = Math.abs(geoAngle(orig, prev, projection) - geoAngle(orig, next, projection)) * 180 / Math.PI; // Don't add orig vertex if it would just make a straight line..

            if (angle > 175 && angle < 185) return graph; // moving forward or backward along way?

            var p1 = [prev.loc, orig.loc, moved.loc, next.loc].map(projection);
            var p2 = [prev.loc, moved.loc, orig.loc, next.loc].map(projection);
            var d1 = geoPathLength(p1);
            var d2 = geoPathLength(p2);
            var insertAt = d1 <= d2 ? movedIndex : nextIndex; // moving around closed loop?

            if (way.isClosed() && insertAt === 0) insertAt = len;
            way = way.addNode(orig.id, insertAt);
            return graph.replace(orig).replace(way);
          } // Remove duplicate vertex that might have been added by
          // replaceMovedVertex.  This is done after the unzorro checks.


          function removeDuplicateVertices(wayId, graph) {
            var way = graph.entity(wayId);
            var epsilon = 1e-6;
            var prev, curr;

            function isInteresting(node, graph) {
              return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
            }

            for (var i = 0; i < way.nodes.length; i++) {
              curr = graph.entity(way.nodes[i]);

              if (prev && curr && geoVecEqual(prev.loc, curr.loc, epsilon)) {
                if (!isInteresting(prev, graph)) {
                  way = way.removeNode(prev.id);
                  graph = graph.replace(way).remove(prev);
                } else if (!isInteresting(curr, graph)) {
                  way = way.removeNode(curr.id);
                  graph = graph.replace(way).remove(curr);
                }
              }

              prev = curr;
            }

            return graph;
          } // Reorder nodes around intersections that have moved..
          //
          //  Start:                way1.nodes: b,e         (moving)
          //  a - b - c ----- d     way2.nodes: a,b,c,d     (static)
          //      |                 vertex: b
          //      e                 isEP1: true,  isEP2, false
          //
          //  way1 `b,e` moved here:
          //  a ----- c = b - d
          //              |
          //              e
          //
          //  reorder nodes         way1.nodes: b,e
          //  a ----- c - b - d     way2.nodes: a,c,b,d
          //              |
          //              e
          //


          function unZorroIntersection(intersection, graph) {
            var vertex = graph.entity(intersection.nodeId);
            var way1 = graph.entity(intersection.movedId);
            var way2 = graph.entity(intersection.unmovedId);
            var isEP1 = intersection.movedIsEP;
            var isEP2 = intersection.unmovedIsEP; // don't move the vertex if it is the endpoint of both ways.

            if (isEP1 && isEP2) return graph;
            var nodes1 = graph.childNodes(way1).filter(function (n) {
              return n !== vertex;
            });
            var nodes2 = graph.childNodes(way2).filter(function (n) {
              return n !== vertex;
            });
            if (way1.isClosed() && way1.first() === vertex.id) nodes1.push(nodes1[0]);
            if (way2.isClosed() && way2.first() === vertex.id) nodes2.push(nodes2[0]);
            var edge1 = !isEP1 && geoChooseEdge(nodes1, projection(vertex.loc), projection);
            var edge2 = !isEP2 && geoChooseEdge(nodes2, projection(vertex.loc), projection);
            var loc; // snap vertex to nearest edge (or some point between them)..

            if (!isEP1 && !isEP2) {
              var epsilon = 1e-6,
                  maxIter = 10;

              for (var i = 0; i < maxIter; i++) {
                loc = geoVecInterp(edge1.loc, edge2.loc, 0.5);
                edge1 = geoChooseEdge(nodes1, projection(loc), projection);
                edge2 = geoChooseEdge(nodes2, projection(loc), projection);
                if (Math.abs(edge1.distance - edge2.distance) < epsilon) break;
              }
            } else if (!isEP1) {
              loc = edge1.loc;
            } else {
              loc = edge2.loc;
            }

            graph = graph.replace(vertex.move(loc)); // if zorro happened, reorder nodes..

            if (!isEP1 && edge1.index !== way1.nodes.indexOf(vertex.id)) {
              way1 = way1.removeNode(vertex.id).addNode(vertex.id, edge1.index);
              graph = graph.replace(way1);
            }

            if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
              way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
              graph = graph.replace(way2);
            }

            return graph;
          }

          function cleanupIntersections(graph) {
            for (var i = 0; i < cache.intersections.length; i++) {
              var obj = cache.intersections[i];
              graph = replaceMovedVertex(obj.nodeId, obj.movedId, graph, _delta);
              graph = replaceMovedVertex(obj.nodeId, obj.unmovedId, graph, null);
              graph = unZorroIntersection(obj, graph);
              graph = removeDuplicateVertices(obj.movedId, graph);
              graph = removeDuplicateVertices(obj.unmovedId, graph);
            }

            return graph;
          } // check if moving way endpoint can cross an unmoved way, if so limit delta..


          function limitDelta(graph) {
            function moveNode(loc) {
              return geoVecAdd(projection(loc), _delta);
            }

            for (var i = 0; i < cache.intersections.length; i++) {
              var obj = cache.intersections[i]; // Don't limit movement if this is vertex joins 2 endpoints..

              if (obj.movedIsEP && obj.unmovedIsEP) continue; // Don't limit movement if this vertex is not an endpoint anyway..

              if (!obj.movedIsEP) continue;
              var node = graph.entity(obj.nodeId);
              var start = projection(node.loc);
              var end = geoVecAdd(start, _delta);
              var movedNodes = graph.childNodes(graph.entity(obj.movedId));
              var movedPath = movedNodes.map(function (n) {
                return moveNode(n.loc);
              });
              var unmovedNodes = graph.childNodes(graph.entity(obj.unmovedId));
              var unmovedPath = unmovedNodes.map(function (n) {
                return projection(n.loc);
              });
              var hits = geoPathIntersections(movedPath, unmovedPath);

              for (var j = 0; i < hits.length; i++) {
                if (geoVecEqual(hits[j], end)) continue;
                var edge = geoChooseEdge(unmovedNodes, end, projection);
                _delta = geoVecSubtract(projection(edge.loc), start);
              }
            }
          }

          var action = function action(graph) {
            if (_delta[0] === 0 && _delta[1] === 0) return graph;
            setupCache(graph);

            if (cache.intersections.length) {
              limitDelta(graph);
            }

            for (var i = 0; i < cache.nodes.length; i++) {
              var node = graph.entity(cache.nodes[i]);
              var start = projection(node.loc);
              var end = geoVecAdd(start, _delta);
              graph = graph.replace(node.move(projection.invert(end)));
            }

            if (cache.intersections.length) {
              graph = cleanupIntersections(graph);
            }

            return graph;
          };

          action.delta = function () {
            return _delta;
          };

          return action;
        }

        function actionMoveMember(relationId, fromIndex, toIndex) {
          return function (graph) {
            return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
          };
        }

        function actionMoveNode(nodeID, toLoc) {
          var action = function action(graph, t) {
            if (t === null || !isFinite(t)) t = 1;
            t = Math.min(Math.max(+t, 0), 1);
            var node = graph.entity(nodeID);
            return graph.replace(node.move(geoVecInterp(node.loc, toLoc, t)));
          };

          action.transitionable = true;
          return action;
        }

        function actionNoop() {
          return function (graph) {
            return graph;
          };
        }

        function actionOrthogonalize(wayID, projection, vertexID, degThresh, ep) {
          var epsilon = ep || 1e-4;
          var threshold = degThresh || 13; // degrees within right or straight to alter
          // We test normalized dot products so we can compare as cos(angle)

          var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
          var upperThreshold = Math.cos(threshold * Math.PI / 180);

          var action = function action(graph, t) {
            if (t === null || !isFinite(t)) t = 1;
            t = Math.min(Math.max(+t, 0), 1);
            var way = graph.entity(wayID);
            way = way.removeNode(''); // sanity check - remove any consecutive duplicates

            if (way.tags.nonsquare) {
              var tags = Object.assign({}, way.tags); // since we're squaring, remove indication that this is physically unsquare

              delete tags.nonsquare;
              way = way.update({
                tags: tags
              });
            }

            graph = graph.replace(way);
            var isClosed = way.isClosed();
            var nodes = graph.childNodes(way).slice(); // shallow copy

            if (isClosed) nodes.pop();

            if (vertexID !== undefined) {
              nodes = nodeSubset(nodes, vertexID, isClosed);
              if (nodes.length !== 3) return graph;
            } // note: all geometry functions here use the unclosed node/point/coord list


            var nodeCount = {};
            var points = [];
            var corner = {
              i: 0,
              dotp: 1
            };
            var node, point, loc, score, motions, i, j;

            for (i = 0; i < nodes.length; i++) {
              node = nodes[i];
              nodeCount[node.id] = (nodeCount[node.id] || 0) + 1;
              points.push({
                id: node.id,
                coord: projection(node.loc)
              });
            }

            if (points.length === 3) {
              // move only one vertex for right triangle
              for (i = 0; i < 1000; i++) {
                motions = points.map(calcMotion);
                points[corner.i].coord = geoVecAdd(points[corner.i].coord, motions[corner.i]);
                score = corner.dotp;

                if (score < epsilon) {
                  break;
                }
              }

              node = graph.entity(nodes[corner.i].id);
              loc = projection.invert(points[corner.i].coord);
              graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
            } else {
              var straights = [];
              var simplified = []; // Remove points from nearly straight sections..
              // This produces a simplified shape to orthogonalize

              for (i = 0; i < points.length; i++) {
                point = points[i];
                var dotp = 0;

                if (isClosed || i > 0 && i < points.length - 1) {
                  var a = points[(i - 1 + points.length) % points.length];
                  var b = points[(i + 1) % points.length];
                  dotp = Math.abs(geoOrthoNormalizedDotProduct(a.coord, b.coord, point.coord));
                }

                if (dotp > upperThreshold) {
                  straights.push(point);
                } else {
                  simplified.push(point);
                }
              } // Orthogonalize the simplified shape


              var bestPoints = clonePoints(simplified);
              var originalPoints = clonePoints(simplified);
              score = Infinity;

              for (i = 0; i < 1000; i++) {
                motions = simplified.map(calcMotion);

                for (j = 0; j < motions.length; j++) {
                  simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
                }

                var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);

                if (newScore < score) {
                  bestPoints = clonePoints(simplified);
                  score = newScore;
                }

                if (score < epsilon) {
                  break;
                }
              }

              var bestCoords = bestPoints.map(function (p) {
                return p.coord;
              });
              if (isClosed) bestCoords.push(bestCoords[0]); // move the nodes that should move

              for (i = 0; i < bestPoints.length; i++) {
                point = bestPoints[i];

                if (!geoVecEqual(originalPoints[i].coord, point.coord)) {
                  node = graph.entity(point.id);
                  loc = projection.invert(point.coord);
                  graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
                }
              } // move the nodes along straight segments


              for (i = 0; i < straights.length; i++) {
                point = straights[i];
                if (nodeCount[point.id] > 1) continue; // skip self-intersections

                node = graph.entity(point.id);

                if (t === 1 && graph.parentWays(node).length === 1 && graph.parentRelations(node).length === 0 && !node.hasInterestingTags()) {
                  // remove uninteresting points..
                  graph = actionDeleteNode(node.id)(graph);
                } else {
                  // move interesting points to the nearest edge..
                  var choice = geoVecProject(point.coord, bestCoords);

                  if (choice) {
                    loc = projection.invert(choice.target);
                    graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
                  }
                }
              }
            }

            return graph;

            function clonePoints(array) {
              return array.map(function (p) {
                return {
                  id: p.id,
                  coord: [p.coord[0], p.coord[1]]
                };
              });
            }

            function calcMotion(point, i, array) {
              // don't try to move the endpoints of a non-closed way.
              if (!isClosed && (i === 0 || i === array.length - 1)) return [0, 0]; // don't try to move a node that appears more than once (self intersection)

              if (nodeCount[array[i].id] > 1) return [0, 0];
              var a = array[(i - 1 + array.length) % array.length].coord;
              var origin = point.coord;
              var b = array[(i + 1) % array.length].coord;
              var p = geoVecSubtract(a, origin);
              var q = geoVecSubtract(b, origin);
              var scale = 2 * Math.min(geoVecLength(p), geoVecLength(q));
              p = geoVecNormalize(p);
              q = geoVecNormalize(q);
              var dotp = p[0] * q[0] + p[1] * q[1];
              var val = Math.abs(dotp);

              if (val < lowerThreshold) {
                // nearly orthogonal
                corner.i = i;
                corner.dotp = val;
                var vec = geoVecNormalize(geoVecAdd(p, q));
                return geoVecScale(vec, 0.1 * dotp * scale);
              }

              return [0, 0]; // do nothing
            }
          }; // if we are only orthogonalizing one vertex,
          // get that vertex and the previous and next


          function nodeSubset(nodes, vertexID, isClosed) {
            var first = isClosed ? 0 : 1;
            var last = isClosed ? nodes.length : nodes.length - 1;

            for (var i = first; i < last; i++) {
              if (nodes[i].id === vertexID) {
                return [nodes[(i - 1 + nodes.length) % nodes.length], nodes[i], nodes[(i + 1) % nodes.length]];
              }
            }

            return [];
          }

          action.disabled = function (graph) {
            var way = graph.entity(wayID);
            way = way.removeNode(''); // sanity check - remove any consecutive duplicates

            graph = graph.replace(way);
            var isClosed = way.isClosed();
            var nodes = graph.childNodes(way).slice(); // shallow copy

            if (isClosed) nodes.pop();
            var allowStraightAngles = false;

            if (vertexID !== undefined) {
              allowStraightAngles = true;
              nodes = nodeSubset(nodes, vertexID, isClosed);
              if (nodes.length !== 3) return 'end_vertex';
            }

            var coords = nodes.map(function (n) {
              return projection(n.loc);
            });
            var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);

            if (score === null) {
              return 'not_squarish';
            } else if (score === 0) {
              return 'square_enough';
            } else {
              return false;
            }
          };

          action.transitionable = true;
          return action;
        }

        //
        // `turn` must be an `osmTurn` object
        // see osm/intersection.js, pathToTurn()
        //
        // This specifies a restriction of type `restriction` when traveling from
        // `turn.from.way` toward `turn.to.way` via `turn.via.node` OR `turn.via.ways`.
        // (The action does not check that these entities form a valid intersection.)
        //
        // From, to, and via ways should be split before calling this action.
        // (old versions of the code would split the ways here, but we no longer do it)
        //
        // For testing convenience, accepts a restrictionID to assign to the new
        // relation. Normally, this will be undefined and the relation will
        // automatically be assigned a new ID.
        //

        function actionRestrictTurn(turn, restrictionType, restrictionID) {
          return function (graph) {
            var fromWay = graph.entity(turn.from.way);
            var toWay = graph.entity(turn.to.way);
            var viaNode = turn.via.node && graph.entity(turn.via.node);
            var viaWays = turn.via.ways && turn.via.ways.map(function (id) {
              return graph.entity(id);
            });
            var members = [];
            members.push({
              id: fromWay.id,
              type: 'way',
              role: 'from'
            });

            if (viaNode) {
              members.push({
                id: viaNode.id,
                type: 'node',
                role: 'via'
              });
            } else if (viaWays) {
              viaWays.forEach(function (viaWay) {
                members.push({
                  id: viaWay.id,
                  type: 'way',
                  role: 'via'
                });
              });
            }

            members.push({
              id: toWay.id,
              type: 'way',
              role: 'to'
            });
            return graph.replace(osmRelation({
              id: restrictionID,
              tags: {
                type: 'restriction',
                restriction: restrictionType
              },
              members: members
            }));
          };
        }

        function actionRevert(id) {
          var action = function action(graph) {
            var entity = graph.hasEntity(id),
                base = graph.base().entities[id];

            if (entity && !base) {
              // entity will be removed..
              if (entity.type === 'node') {
                graph.parentWays(entity).forEach(function (parent) {
                  parent = parent.removeNode(id);
                  graph = graph.replace(parent);

                  if (parent.isDegenerate()) {
                    graph = actionDeleteWay(parent.id)(graph);
                  }
                });
              }

              graph.parentRelations(entity).forEach(function (parent) {
                parent = parent.removeMembersWithID(id);
                graph = graph.replace(parent);

                if (parent.isDegenerate()) {
                  graph = actionDeleteRelation(parent.id)(graph);
                }
              });
            }

            return graph.revert(id);
          };

          return action;
        }

        function actionRotate(rotateIds, pivot, angle, projection) {
          var action = function action(graph) {
            return graph.update(function (graph) {
              utilGetAllNodes(rotateIds, graph).forEach(function (node) {
                var point = geoRotate([projection(node.loc)], angle, pivot)[0];
                graph = graph.replace(node.move(projection.invert(point)));
              });
            });
          };

          return action;
        }

        function actionScale(ids, pivotLoc, scaleFactor, projection) {
          return function (graph) {
            return graph.update(function (graph) {
              var point, radial;
              utilGetAllNodes(ids, graph).forEach(function (node) {
                point = projection(node.loc);
                radial = [point[0] - pivotLoc[0], point[1] - pivotLoc[1]];
                point = [pivotLoc[0] + scaleFactor * radial[0], pivotLoc[1] + scaleFactor * radial[1]];
                graph = graph.replace(node.move(projection.invert(point)));
              });
            });
          };
        }

        /* Align nodes along their common axis */

        function actionStraightenNodes(nodeIDs, projection) {
          function positionAlongWay(a, o, b) {
            return geoVecDot(a, b, o) / geoVecDot(b, b, o);
          } // returns the endpoints of the long axis of symmetry of the `points` bounding rect


          function getEndpoints(points) {
            var ssr = geoGetSmallestSurroundingRectangle(points); // Choose line pq = axis of symmetry.
            // The shape's surrounding rectangle has 2 axes of symmetry.
            // Snap points to the long axis

            var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
            var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
            var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
            var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
            var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);

            if (isLong) {
              return [p1, q1];
            }

            return [p2, q2];
          }

          var action = function action(graph, t) {
            if (t === null || !isFinite(t)) t = 1;
            t = Math.min(Math.max(+t, 0), 1);
            var nodes = nodeIDs.map(function (id) {
              return graph.entity(id);
            });
            var points = nodes.map(function (n) {
              return projection(n.loc);
            });
            var endpoints = getEndpoints(points);
            var startPoint = endpoints[0];
            var endPoint = endpoints[1]; // Move points onto the line connecting the endpoints

            for (var i = 0; i < points.length; i++) {
              var node = nodes[i];
              var point = points[i];
              var u = positionAlongWay(point, startPoint, endPoint);
              var point2 = geoVecInterp(startPoint, endPoint, u);
              var loc2 = projection.invert(point2);
              graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
            }

            return graph;
          };

          action.disabled = function (graph) {
            var nodes = nodeIDs.map(function (id) {
              return graph.entity(id);
            });
            var points = nodes.map(function (n) {
              return projection(n.loc);
            });
            var endpoints = getEndpoints(points);
            var startPoint = endpoints[0];
            var endPoint = endpoints[1];
            var maxDistance = 0;

            for (var i = 0; i < points.length; i++) {
              var point = points[i];
              var u = positionAlongWay(point, startPoint, endPoint);
              var p = geoVecInterp(startPoint, endPoint, u);
              var dist = geoVecLength(p, point);

              if (!isNaN(dist) && dist > maxDistance) {
                maxDistance = dist;
              }
            }

            if (maxDistance < 0.0001) {
              return 'straight_enough';
            }
          };

          action.transitionable = true;
          return action;
        }

        /*
         * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
         */

        function actionStraightenWay(selectedIDs, projection) {
          function positionAlongWay(a, o, b) {
            return geoVecDot(a, b, o) / geoVecDot(b, b, o);
          } // Return all selected ways as a continuous, ordered array of nodes


          function allNodes(graph) {
            var nodes = [];
            var startNodes = [];
            var endNodes = [];
            var remainingWays = [];
            var selectedWays = selectedIDs.filter(function (w) {
              return graph.entity(w).type === 'way';
            });
            var selectedNodes = selectedIDs.filter(function (n) {
              return graph.entity(n).type === 'node';
            });

            for (var i = 0; i < selectedWays.length; i++) {
              var way = graph.entity(selectedWays[i]);
              nodes = way.nodes.slice(0);
              remainingWays.push(nodes);
              startNodes.push(nodes[0]);
              endNodes.push(nodes[nodes.length - 1]);
            } // Remove duplicate end/startNodes (duplicate nodes cannot be at the line end,
            //   and need to be removed so currNode difference calculation below works)
            // i.e. ["n-1", "n-1", "n-2"] => ["n-2"]


            startNodes = startNodes.filter(function (n) {
              return startNodes.indexOf(n) === startNodes.lastIndexOf(n);
            });
            endNodes = endNodes.filter(function (n) {
              return endNodes.indexOf(n) === endNodes.lastIndexOf(n);
            }); // Choose the initial endpoint to start from

            var currNode = utilArrayDifference(startNodes, endNodes).concat(utilArrayDifference(endNodes, startNodes))[0];
            var nextWay = [];
            nodes = []; // Create nested function outside of loop to avoid "function in loop" lint error

            var getNextWay = function getNextWay(currNode, remainingWays) {
              return remainingWays.filter(function (way) {
                return way[0] === currNode || way[way.length - 1] === currNode;
              })[0];
            }; // Add nodes to end of nodes array, until all ways are added


            while (remainingWays.length) {
              nextWay = getNextWay(currNode, remainingWays);
              remainingWays = utilArrayDifference(remainingWays, [nextWay]);

              if (nextWay[0] !== currNode) {
                nextWay.reverse();
              }

              nodes = nodes.concat(nextWay);
              currNode = nodes[nodes.length - 1];
            } // If user selected 2 nodes to straighten between, then slice nodes array to those nodes


            if (selectedNodes.length === 2) {
              var startNodeIdx = nodes.indexOf(selectedNodes[0]);
              var endNodeIdx = nodes.indexOf(selectedNodes[1]);
              var sortedStartEnd = [startNodeIdx, endNodeIdx];
              sortedStartEnd.sort(function (a, b) {
                return a - b;
              });
              nodes = nodes.slice(sortedStartEnd[0], sortedStartEnd[1] + 1);
            }

            return nodes.map(function (n) {
              return graph.entity(n);
            });
          }

          function shouldKeepNode(node, graph) {
            return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
          }

          var action = function action(graph, t) {
            if (t === null || !isFinite(t)) t = 1;
            t = Math.min(Math.max(+t, 0), 1);
            var nodes = allNodes(graph);
            var points = nodes.map(function (n) {
              return projection(n.loc);
            });
            var startPoint = points[0];
            var endPoint = points[points.length - 1];
            var toDelete = [];
            var i;

            for (i = 1; i < points.length - 1; i++) {
              var node = nodes[i];
              var point = points[i];

              if (t < 1 || shouldKeepNode(node, graph)) {
                var u = positionAlongWay(point, startPoint, endPoint);
                var p = geoVecInterp(startPoint, endPoint, u);
                var loc2 = projection.invert(p);
                graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
              } else {
                // safe to delete
                if (toDelete.indexOf(node) === -1) {
                  toDelete.push(node);
                }
              }
            }

            for (i = 0; i < toDelete.length; i++) {
              graph = actionDeleteNode(toDelete[i].id)(graph);
            }

            return graph;
          };

          action.disabled = function (graph) {
            // check way isn't too bendy
            var nodes = allNodes(graph);
            var points = nodes.map(function (n) {
              return projection(n.loc);
            });
            var startPoint = points[0];
            var endPoint = points[points.length - 1];
            var threshold = 0.2 * geoVecLength(startPoint, endPoint);
            var i;

            if (threshold === 0) {
              return 'too_bendy';
            }

            var maxDistance = 0;

            for (i = 1; i < points.length - 1; i++) {
              var point = points[i];
              var u = positionAlongWay(point, startPoint, endPoint);
              var p = geoVecInterp(startPoint, endPoint, u);
              var dist = geoVecLength(p, point); // to bendy if point is off by 20% of total start/end distance in projected space

              if (isNaN(dist) || dist > threshold) {
                return 'too_bendy';
              } else if (dist > maxDistance) {
                maxDistance = dist;
              }
            }

            var keepingAllNodes = nodes.every(function (node, i) {
              return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
            });

            if (maxDistance < 0.0001 && // Allow straightening even if already straight in order to remove extraneous nodes
            keepingAllNodes) {
              return 'straight_enough';
            }
          };

          action.transitionable = true;
          return action;
        }

        //
        // `turn` must be an `osmTurn` object with a `restrictionID` property.
        // see osm/intersection.js, pathToTurn()
        //

        function actionUnrestrictTurn(turn) {
          return function (graph) {
            return actionDeleteRelation(turn.restrictionID)(graph);
          };
        }

        /* Reflect the given area around its axis of symmetry */

        function actionReflect(reflectIds, projection) {
          var _useLongAxis = true;

          var action = function action(graph, t) {
            if (t === null || !isFinite(t)) t = 1;
            t = Math.min(Math.max(+t, 0), 1);
            var nodes = utilGetAllNodes(reflectIds, graph);
            var points = nodes.map(function (n) {
              return projection(n.loc);
            });
            var ssr = geoGetSmallestSurroundingRectangle(points); // Choose line pq = axis of symmetry.
            // The shape's surrounding rectangle has 2 axes of symmetry.
            // Reflect across the longer axis by default.

            var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
            var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
            var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
            var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
            var p, q;
            var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);

            if (_useLongAxis && isLong || !_useLongAxis && !isLong) {
              p = p1;
              q = q1;
            } else {
              p = p2;
              q = q2;
            } // reflect c across pq
            // http://math.stackexchange.com/questions/65503/point-reflection-over-a-line


            var dx = q[0] - p[0];
            var dy = q[1] - p[1];
            var a = (dx * dx - dy * dy) / (dx * dx + dy * dy);
            var b = 2 * dx * dy / (dx * dx + dy * dy);

            for (var i = 0; i < nodes.length; i++) {
              var node = nodes[i];
              var c = projection(node.loc);
              var c2 = [a * (c[0] - p[0]) + b * (c[1] - p[1]) + p[0], b * (c[0] - p[0]) - a * (c[1] - p[1]) + p[1]];
              var loc2 = projection.invert(c2);
              node = node.move(geoVecInterp(node.loc, loc2, t));
              graph = graph.replace(node);
            }

            return graph;
          };

          action.useLongAxis = function (val) {
            if (!arguments.length) return _useLongAxis;
            _useLongAxis = val;
            return action;
          };

          action.transitionable = true;
          return action;
        }

        function actionUpgradeTags(entityId, oldTags, replaceTags) {
          return function (graph) {
            var entity = graph.entity(entityId);
            var tags = Object.assign({}, entity.tags); // shallow copy

            var transferValue;
            var semiIndex;

            for (var oldTagKey in oldTags) {
              if (!(oldTagKey in tags)) continue; // wildcard match

              if (oldTags[oldTagKey] === '*') {
                // note the value since we might need to transfer it
                transferValue = tags[oldTagKey];
                delete tags[oldTagKey]; // exact match
              } else if (oldTags[oldTagKey] === tags[oldTagKey]) {
                delete tags[oldTagKey]; // match is within semicolon-delimited values
              } else {
                var vals = tags[oldTagKey].split(';').filter(Boolean);
                var oldIndex = vals.indexOf(oldTags[oldTagKey]);

                if (vals.length === 1 || oldIndex === -1) {
                  delete tags[oldTagKey];
                } else {
                  if (replaceTags && replaceTags[oldTagKey]) {
                    // replacing a value within a semicolon-delimited value, note the index
                    semiIndex = oldIndex;
                  }

                  vals.splice(oldIndex, 1);
                  tags[oldTagKey] = vals.join(';');
                }
              }
            }

            if (replaceTags) {
              for (var replaceKey in replaceTags) {
                var replaceValue = replaceTags[replaceKey];

                if (replaceValue === '*') {
                  if (tags[replaceKey] && tags[replaceKey] !== 'no') {
                    // allow any pre-existing value except `no` (troll tag)
                    continue;
                  } else {
                    // otherwise assume `yes` is okay
                    tags[replaceKey] = 'yes';
                  }
                } else if (replaceValue === '$1') {
                  tags[replaceKey] = transferValue;
                } else {
                  if (tags[replaceKey] && oldTags[replaceKey] && semiIndex !== undefined) {
                    // don't override preexisting values
                    var existingVals = tags[replaceKey].split(';').filter(Boolean);

                    if (existingVals.indexOf(replaceValue) === -1) {
                      existingVals.splice(semiIndex, 0, replaceValue);
                      tags[replaceKey] = existingVals.join(';');
                    }
                  } else {
                    tags[replaceKey] = replaceValue;
                  }
                }
              }
            }

            return graph.replace(entity.update({
              tags: tags
            }));
          };
        }

        function behaviorEdit(context) {
          function behavior() {
            context.map().minzoom(context.minEditableZoom());
          }

          behavior.off = function () {
            context.map().minzoom(0);
          };

          return behavior;
        }

        /*
           The hover behavior adds the `.hover` class on pointerover to all elements to which
           the identical datum is bound, and removes it on pointerout.

           The :hover pseudo-class is insufficient for iD's purposes because a datum's visual
           representation may consist of several elements scattered throughout the DOM hierarchy.
           Only one of these elements can have the :hover pseudo-class, but all of them will
           have the .hover class.
         */

        function behaviorHover(context) {
          var dispatch = dispatch$8('hover');

          var _selection = select(null);

          var _newNodeId = null;
          var _initialNodeID = null;

          var _altDisables;

          var _ignoreVertex;

          var _targets = []; // use pointer events on supported platforms; fallback to mouse events

          var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

          function keydown(d3_event) {
            if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
              _selection.selectAll('.hover').classed('hover-suppressed', true).classed('hover', false);

              _selection.classed('hover-disabled', true);

              dispatch.call('hover', this, null);
            }
          }

          function keyup(d3_event) {
            if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
              _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false).classed('hover', true);

              _selection.classed('hover-disabled', false);

              dispatch.call('hover', this, _targets);
            }
          }

          function behavior(selection) {
            _selection = selection;
            _targets = [];

            if (_initialNodeID) {
              _newNodeId = _initialNodeID;
              _initialNodeID = null;
            } else {
              _newNodeId = null;
            }

            _selection.on(_pointerPrefix + 'over.hover', pointerover).on(_pointerPrefix + 'out.hover', pointerout) // treat pointerdown as pointerover for touch devices
            .on(_pointerPrefix + 'down.hover', pointerover);

            select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true).on('keydown.hover', keydown).on('keyup.hover', keyup);

            function eventTarget(d3_event) {
              var datum = d3_event.target && d3_event.target.__data__;
              if (_typeof(datum) !== 'object') return null;

              if (!(datum instanceof osmEntity) && datum.properties && datum.properties.entity instanceof osmEntity) {
                return datum.properties.entity;
              }

              return datum;
            }

            function pointerover(d3_event) {
              // ignore mouse hovers with buttons pressed unless dragging
              if (context.mode().id.indexOf('drag') === -1 && (!d3_event.pointerType || d3_event.pointerType === 'mouse') && d3_event.buttons) return;
              var target = eventTarget(d3_event);

              if (target && _targets.indexOf(target) === -1) {
                _targets.push(target);

                updateHover(d3_event, _targets);
              }
            }

            function pointerout(d3_event) {
              var target = eventTarget(d3_event);

              var index = _targets.indexOf(target);

              if (index !== -1) {
                _targets.splice(index);

                updateHover(d3_event, _targets);
              }
            }

            function allowsVertex(d) {
              return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
            }

            function modeAllowsHover(target) {
              var mode = context.mode();

              if (mode.id === 'add-point') {
                return mode.preset.matchGeometry('vertex') || target.type !== 'way' && target.geometry(context.graph()) !== 'vertex';
              }

              return true;
            }

            function updateHover(d3_event, targets) {
              _selection.selectAll('.hover').classed('hover', false);

              _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);

              var mode = context.mode();

              if (!_newNodeId && (mode.id === 'draw-line' || mode.id === 'draw-area')) {
                var node = targets.find(function (target) {
                  return target instanceof osmEntity && target.type === 'node';
                });
                _newNodeId = node && node.id;
              }

              targets = targets.filter(function (datum) {
                if (datum instanceof osmEntity) {
                  // If drawing a way, don't hover on a node that was just placed. #3974
                  return datum.id !== _newNodeId && (datum.type !== 'node' || !_ignoreVertex || allowsVertex(datum)) && modeAllowsHover(datum);
                }

                return true;
              });
              var selector = '';

              for (var i in targets) {
                var datum = targets[i]; // What are we hovering over?

                if (datum.__featurehash__) {
                  // hovering custom data
                  selector += ', .data' + datum.__featurehash__;
                } else if (datum instanceof QAItem) {
                  selector += ', .' + datum.service + '.itemId-' + datum.id;
                } else if (datum instanceof osmNote) {
                  selector += ', .note-' + datum.id;
                } else if (datum instanceof osmEntity) {
                  selector += ', .' + datum.id;

                  if (datum.type === 'relation') {
                    for (var j in datum.members) {
                      selector += ', .' + datum.members[j].id;
                    }
                  }
                }
              }

              var suppressed = _altDisables && d3_event && d3_event.altKey;

              if (selector.trim().length) {
                // remove the first comma
                selector = selector.slice(1);

                _selection.selectAll(selector).classed(suppressed ? 'hover-suppressed' : 'hover', true);
              }

              dispatch.call('hover', this, !suppressed && targets);
            }
          }

          behavior.off = function (selection) {
            selection.selectAll('.hover').classed('hover', false);
            selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
            selection.classed('hover-disabled', false);
            selection.on(_pointerPrefix + 'over.hover', null).on(_pointerPrefix + 'out.hover', null).on(_pointerPrefix + 'down.hover', null);
            select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', null, true).on('keydown.hover', null).on('keyup.hover', null);
          };

          behavior.altDisables = function (val) {
            if (!arguments.length) return _altDisables;
            _altDisables = val;
            return behavior;
          };

          behavior.ignoreVertex = function (val) {
            if (!arguments.length) return _ignoreVertex;
            _ignoreVertex = val;
            return behavior;
          };

          behavior.initialNodeID = function (nodeId) {
            _initialNodeID = nodeId;
            return behavior;
          };

          return utilRebind(behavior, dispatch, 'on');
        }

        var _disableSpace = false;
        var _lastSpace = null;
        function behaviorDraw(context) {
          var dispatch = dispatch$8('move', 'down', 'downcancel', 'click', 'clickWay', 'clickNode', 'undo', 'cancel', 'finish');
          var keybinding = utilKeybinding('draw');

          var _hover = behaviorHover(context).altDisables(true).ignoreVertex(true).on('hover', context.ui().sidebar.hover);

          var _edit = behaviorEdit(context);

          var _closeTolerance = 4;
          var _tolerance = 12;
          var _mouseLeave = false;
          var _lastMouse = null;

          var _lastPointerUpEvent;

          var _downPointer; // use pointer events on supported platforms; fallback to mouse events


          var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // related code
          // - `mode/drag_node.js` `datum()`


          function datum(d3_event) {
            var mode = context.mode();
            var isNote = mode && mode.id.indexOf('note') !== -1;
            if (d3_event.altKey || isNote) return {};
            var element;

            if (d3_event.type === 'keydown') {
              element = _lastMouse && _lastMouse.target;
            } else {
              element = d3_event.target;
            } // When drawing, snap only to touch targets..
            // (this excludes area fills and active drawing elements)


            var d = element.__data__;
            return d && d.properties && d.properties.target ? d : {};
          }

          function pointerdown(d3_event) {
            if (_downPointer) return;
            var pointerLocGetter = utilFastMouse(this);
            _downPointer = {
              id: d3_event.pointerId || 'mouse',
              pointerLocGetter: pointerLocGetter,
              downTime: +new Date(),
              downLoc: pointerLocGetter(d3_event)
            };
            dispatch.call('down', this, d3_event, datum(d3_event));
          }

          function pointerup(d3_event) {
            if (!_downPointer || _downPointer.id !== (d3_event.pointerId || 'mouse')) return;
            var downPointer = _downPointer;
            _downPointer = null;
            _lastPointerUpEvent = d3_event;
            if (downPointer.isCancelled) return;
            var t2 = +new Date();
            var p2 = downPointer.pointerLocGetter(d3_event);
            var dist = geoVecLength(downPointer.downLoc, p2);

            if (dist < _closeTolerance || dist < _tolerance && t2 - downPointer.downTime < 500) {
              // Prevent a quick second click
              select(window).on('click.draw-block', function () {
                d3_event.stopPropagation();
              }, true);
              context.map().dblclickZoomEnable(false);
              window.setTimeout(function () {
                context.map().dblclickZoomEnable(true);
                select(window).on('click.draw-block', null);
              }, 500);
              click(d3_event, p2);
            }
          }

          function pointermove(d3_event) {
            if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse') && !_downPointer.isCancelled) {
              var p2 = _downPointer.pointerLocGetter(d3_event);

              var dist = geoVecLength(_downPointer.downLoc, p2);

              if (dist >= _closeTolerance) {
                _downPointer.isCancelled = true;
                dispatch.call('downcancel', this);
              }
            }

            if (d3_event.pointerType && d3_event.pointerType !== 'mouse' || d3_event.buttons || _downPointer) return; // HACK: Mobile Safari likes to send one or more `mouse` type pointermove
            // events immediately after non-mouse pointerup events; detect and ignore them.

            if (_lastPointerUpEvent && _lastPointerUpEvent.pointerType !== 'mouse' && d3_event.timeStamp - _lastPointerUpEvent.timeStamp < 100) return;
            _lastMouse = d3_event;
            dispatch.call('move', this, d3_event, datum(d3_event));
          }

          function pointercancel(d3_event) {
            if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse')) {
              if (!_downPointer.isCancelled) {
                dispatch.call('downcancel', this);
              }

              _downPointer = null;
            }
          }

          function mouseenter() {
            _mouseLeave = false;
          }

          function mouseleave() {
            _mouseLeave = true;
          }

          function allowsVertex(d) {
            return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
          } // related code
          // - `mode/drag_node.js`     `doMove()`
          // - `behavior/draw.js`      `click()`
          // - `behavior/draw_way.js`  `move()`


          function click(d3_event, loc) {
            var d = datum(d3_event);
            var target = d && d.properties && d.properties.entity;
            var mode = context.mode();

            if (target && target.type === 'node' && allowsVertex(target)) {
              // Snap to a node
              dispatch.call('clickNode', this, target, d);
              return;
            } else if (target && target.type === 'way' && (mode.id !== 'add-point' || mode.preset.matchGeometry('vertex'))) {
              // Snap to a way
              var choice = geoChooseEdge(context.graph().childNodes(target), loc, context.projection, context.activeID());

              if (choice) {
                var edge = [target.nodes[choice.index - 1], target.nodes[choice.index]];
                dispatch.call('clickWay', this, choice.loc, edge, d);
                return;
              }
            } else if (mode.id !== 'add-point' || mode.preset.matchGeometry('point')) {
              var locLatLng = context.projection.invert(loc);
              dispatch.call('click', this, locLatLng, d);
            }
          } // treat a spacebar press like a click


          function space(d3_event) {
            d3_event.preventDefault();
            d3_event.stopPropagation();
            var currSpace = context.map().mouse();

            if (_disableSpace && _lastSpace) {
              var dist = geoVecLength(_lastSpace, currSpace);

              if (dist > _tolerance) {
                _disableSpace = false;
              }
            }

            if (_disableSpace || _mouseLeave || !_lastMouse) return; // user must move mouse or release space bar to allow another click

            _lastSpace = currSpace;
            _disableSpace = true;
            select(window).on('keyup.space-block', function () {
              d3_event.preventDefault();
              d3_event.stopPropagation();
              _disableSpace = false;
              select(window).on('keyup.space-block', null);
            }); // get the current mouse position

            var loc = context.map().mouse() || // or the map center if the mouse has never entered the map
            context.projection(context.map().center());
            click(d3_event, loc);
          }

          function backspace(d3_event) {
            d3_event.preventDefault();
            dispatch.call('undo');
          }

          function del(d3_event) {
            d3_event.preventDefault();
            dispatch.call('cancel');
          }

          function ret(d3_event) {
            d3_event.preventDefault();
            dispatch.call('finish');
          }

          function behavior(selection) {
            context.install(_hover);
            context.install(_edit);
            _downPointer = null;
            keybinding.on('⌫', backspace).on('⌦', del).on('⎋', ret).on('↩', ret).on('space', space).on('⌥space', space);
            selection.on('mouseenter.draw', mouseenter).on('mouseleave.draw', mouseleave).on(_pointerPrefix + 'down.draw', pointerdown).on(_pointerPrefix + 'move.draw', pointermove);
            select(window).on(_pointerPrefix + 'up.draw', pointerup, true).on('pointercancel.draw', pointercancel, true);
            select(document).call(keybinding);
            return behavior;
          }

          behavior.off = function (selection) {
            context.ui().sidebar.hover.cancel();
            context.uninstall(_hover);
            context.uninstall(_edit);
            selection.on('mouseenter.draw', null).on('mouseleave.draw', null).on(_pointerPrefix + 'down.draw', null).on(_pointerPrefix + 'move.draw', null);
            select(window).on(_pointerPrefix + 'up.draw', null).on('pointercancel.draw', null); // note: keyup.space-block, click.draw-block should remain

            select(document).call(keybinding.unbind);
          };

          behavior.hover = function () {
            return _hover;
          };

          return utilRebind(behavior, dispatch, 'on');
        }

        function initRange(domain, range) {
          switch (arguments.length) {
            case 0:
              break;

            case 1:
              this.range(domain);
              break;

            default:
              this.range(range).domain(domain);
              break;
          }

          return this;
        }

        function constants(x) {
          return function () {
            return x;
          };
        }

        function number(x) {
          return +x;
        }

        var unit = [0, 1];
        function identity$1(x) {
          return x;
        }

        function normalize(a, b) {
          return (b -= a = +a) ? function (x) {
            return (x - a) / b;
          } : constants(isNaN(b) ? NaN : 0.5);
        }

        function clamper(a, b) {
          var t;
          if (a > b) t = a, a = b, b = t;
          return function (x) {
            return Math.max(a, Math.min(b, x));
          };
        } // normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
        // interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].


        function bimap(domain, range, interpolate) {
          var d0 = domain[0],
              d1 = domain[1],
              r0 = range[0],
              r1 = range[1];
          if (d1 < d0) d0 = normalize(d1, d0), r0 = interpolate(r1, r0);else d0 = normalize(d0, d1), r0 = interpolate(r0, r1);
          return function (x) {
            return r0(d0(x));
          };
        }

        function polymap(domain, range, interpolate) {
          var j = Math.min(domain.length, range.length) - 1,
              d = new Array(j),
              r = new Array(j),
              i = -1; // Reverse descending domains.

          if (domain[j] < domain[0]) {
            domain = domain.slice().reverse();
            range = range.slice().reverse();
          }

          while (++i < j) {
            d[i] = normalize(domain[i], domain[i + 1]);
            r[i] = interpolate(range[i], range[i + 1]);
          }

          return function (x) {
            var i = bisectRight(domain, x, 1, j) - 1;
            return r[i](d[i](x));
          };
        }

        function copy(source, target) {
          return target.domain(source.domain()).range(source.range()).interpolate(source.interpolate()).clamp(source.clamp()).unknown(source.unknown());
        }
        function transformer() {
          var domain = unit,
              range = unit,
              interpolate = interpolate$1,
              transform,
              untransform,
              unknown,
              clamp = identity$1,
              piecewise,
              output,
              input;

          function rescale() {
            var n = Math.min(domain.length, range.length);
            if (clamp !== identity$1) clamp = clamper(domain[0], domain[n - 1]);
            piecewise = n > 2 ? polymap : bimap;
            output = input = null;
            return scale;
          }

          function scale(x) {
            return x == null || isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));
          }

          scale.invert = function (y) {
            return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
          };

          scale.domain = function (_) {
            return arguments.length ? (domain = Array.from(_, number), rescale()) : domain.slice();
          };

          scale.range = function (_) {
            return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
          };

          scale.rangeRound = function (_) {
            return range = Array.from(_), interpolate = interpolateRound, rescale();
          };

          scale.clamp = function (_) {
            return arguments.length ? (clamp = _ ? true : identity$1, rescale()) : clamp !== identity$1;
          };

          scale.interpolate = function (_) {
            return arguments.length ? (interpolate = _, rescale()) : interpolate;
          };

          scale.unknown = function (_) {
            return arguments.length ? (unknown = _, scale) : unknown;
          };

          return function (t, u) {
            transform = t, untransform = u;
            return rescale();
          };
        }
        function continuous() {
          return transformer()(identity$1, identity$1);
        }

        function formatDecimal (x) {
          return Math.abs(x = Math.round(x)) >= 1e21 ? x.toLocaleString("en").replace(/,/g, "") : x.toString(10);
        } // Computes the decimal coefficient and exponent of the specified number x with
        // significant digits p, where x is positive and p is in [1, 21] or undefined.
        // For example, formatDecimalParts(1.23) returns ["123", 0].

        function formatDecimalParts(x, p) {
          if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity

          var i,
              coefficient = x.slice(0, i); // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
          // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).

          return [coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, +x.slice(i + 1)];
        }

        function exponent (x) {
          return x = formatDecimalParts(Math.abs(x)), x ? x[1] : NaN;
        }

        function formatGroup (grouping, thousands) {
          return function (value, width) {
            var i = value.length,
                t = [],
                j = 0,
                g = grouping[0],
                length = 0;

            while (i > 0 && g > 0) {
              if (length + g + 1 > width) g = Math.max(1, width - length);
              t.push(value.substring(i -= g, i + g));
              if ((length += g + 1) > width) break;
              g = grouping[j = (j + 1) % grouping.length];
            }

            return t.reverse().join(thousands);
          };
        }

        function formatNumerals (numerals) {
          return function (value) {
            return value.replace(/[0-9]/g, function (i) {
              return numerals[+i];
            });
          };
        }

        // [[fill]align][sign][symbol][0][width][,][.precision][~][type]
        var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
        function formatSpecifier(specifier) {
          if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
          var match;
          return new FormatSpecifier({
            fill: match[1],
            align: match[2],
            sign: match[3],
            symbol: match[4],
            zero: match[5],
            width: match[6],
            comma: match[7],
            precision: match[8] && match[8].slice(1),
            trim: match[9],
            type: match[10]
          });
        }
        formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof

        function FormatSpecifier(specifier) {
          this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
          this.align = specifier.align === undefined ? ">" : specifier.align + "";
          this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
          this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
          this.zero = !!specifier.zero;
          this.width = specifier.width === undefined ? undefined : +specifier.width;
          this.comma = !!specifier.comma;
          this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
          this.trim = !!specifier.trim;
          this.type = specifier.type === undefined ? "" : specifier.type + "";
        }

        FormatSpecifier.prototype.toString = function () {
          return this.fill + this.align + this.sign + this.symbol + (this.zero ? "0" : "") + (this.width === undefined ? "" : Math.max(1, this.width | 0)) + (this.comma ? "," : "") + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0)) + (this.trim ? "~" : "") + this.type;
        };

        // Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
        function formatTrim (s) {
          out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
            switch (s[i]) {
              case ".":
                i0 = i1 = i;
                break;

              case "0":
                if (i0 === 0) i0 = i;
                i1 = i;
                break;

              default:
                if (!+s[i]) break out;
                if (i0 > 0) i0 = 0;
                break;
            }
          }

          return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
        }

        var nativeToPrecision = 1.0.toPrecision;

        var FORCED$1 = fails(function () {
          // IE7-
          return nativeToPrecision.call(1, undefined) !== '1';
        }) || !fails(function () {
          // V8 ~ Android 4.3-
          nativeToPrecision.call({});
        });

        // `Number.prototype.toPrecision` method
        // https://tc39.es/ecma262/#sec-number.prototype.toprecision
        _export({ target: 'Number', proto: true, forced: FORCED$1 }, {
          toPrecision: function toPrecision(precision) {
            return precision === undefined
              ? nativeToPrecision.call(thisNumberValue(this))
              : nativeToPrecision.call(thisNumberValue(this), precision);
          }
        });

        var prefixExponent;
        function formatPrefixAuto (x, p) {
          var d = formatDecimalParts(x, p);
          if (!d) return x + "";
          var coefficient = d[0],
              exponent = d[1],
              i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
              n = coefficient.length;
          return i === n ? coefficient : i > n ? coefficient + new Array(i - n + 1).join("0") : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i) : "0." + new Array(1 - i).join("0") + formatDecimalParts(x, Math.max(0, p + i - 1))[0]; // less than 1y!
        }

        function formatRounded (x, p) {
          var d = formatDecimalParts(x, p);
          if (!d) return x + "";
          var coefficient = d[0],
              exponent = d[1];
          return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1) : coefficient + new Array(exponent - coefficient.length + 2).join("0");
        }

        var formatTypes = {
          "%": function _(x, p) {
            return (x * 100).toFixed(p);
          },
          "b": function b(x) {
            return Math.round(x).toString(2);
          },
          "c": function c(x) {
            return x + "";
          },
          "d": formatDecimal,
          "e": function e(x, p) {
            return x.toExponential(p);
          },
          "f": function f(x, p) {
            return x.toFixed(p);
          },
          "g": function g(x, p) {
            return x.toPrecision(p);
          },
          "o": function o(x) {
            return Math.round(x).toString(8);
          },
          "p": function p(x, _p) {
            return formatRounded(x * 100, _p);
          },
          "r": formatRounded,
          "s": formatPrefixAuto,
          "X": function X(x) {
            return Math.round(x).toString(16).toUpperCase();
          },
          "x": function x(_x) {
            return Math.round(_x).toString(16);
          }
        };

        function identity (x) {
          return x;
        }

        var map$1 = Array.prototype.map,
            prefixes = ["y", "z", "a", "f", "p", "n", "µ", "m", "", "k", "M", "G", "T", "P", "E", "Z", "Y"];
        function formatLocale (locale) {
          var group = locale.grouping === undefined || locale.thousands === undefined ? identity : formatGroup(map$1.call(locale.grouping, Number), locale.thousands + ""),
              currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
              currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
              decimal = locale.decimal === undefined ? "." : locale.decimal + "",
              numerals = locale.numerals === undefined ? identity : formatNumerals(map$1.call(locale.numerals, String)),
              percent = locale.percent === undefined ? "%" : locale.percent + "",
              minus = locale.minus === undefined ? "−" : locale.minus + "",
              nan = locale.nan === undefined ? "NaN" : locale.nan + "";

          function newFormat(specifier) {
            specifier = formatSpecifier(specifier);
            var fill = specifier.fill,
                align = specifier.align,
                sign = specifier.sign,
                symbol = specifier.symbol,
                zero = specifier.zero,
                width = specifier.width,
                comma = specifier.comma,
                precision = specifier.precision,
                trim = specifier.trim,
                type = specifier.type; // The "n" type is an alias for ",g".

            if (type === "n") comma = true, type = "g"; // The "" type, and any invalid type, is an alias for ".12~g".
            else if (!formatTypes[type]) precision === undefined && (precision = 12), trim = true, type = "g"; // If zero fill is specified, padding goes after sign and before digits.

            if (zero || fill === "0" && align === "=") zero = true, fill = "0", align = "="; // Compute the prefix and suffix.
            // For SI-prefix, the suffix is lazily computed.

            var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
                suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : ""; // What format function should we use?
            // Is this an integer type?
            // Can this type generate exponential notation?

            var formatType = formatTypes[type],
                maybeSuffix = /[defgprs%]/.test(type); // Set the default precision if not specified,
            // or clamp the specified precision to the supported range.
            // For significant precision, it must be in [1, 21].
            // For fixed precision, it must be in [0, 20].

            precision = precision === undefined ? 6 : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) : Math.max(0, Math.min(20, precision));

            function format(value) {
              var valuePrefix = prefix,
                  valueSuffix = suffix,
                  i,
                  n,
                  c;

              if (type === "c") {
                valueSuffix = formatType(value) + valueSuffix;
                value = "";
              } else {
                value = +value; // Determine the sign. -0 is not less than 0, but 1 / -0 is!

                var valueNegative = value < 0 || 1 / value < 0; // Perform the initial formatting.

                value = isNaN(value) ? nan : formatType(Math.abs(value), precision); // Trim insignificant zeros.

                if (trim) value = formatTrim(value); // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.

                if (valueNegative && +value === 0 && sign !== "+") valueNegative = false; // Compute the prefix and suffix.

                valuePrefix = (valueNegative ? sign === "(" ? sign : minus : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
                valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : ""); // Break the formatted value into the integer “value” part that can be
                // grouped, and fractional or exponential “suffix” part that is not.

                if (maybeSuffix) {
                  i = -1, n = value.length;

                  while (++i < n) {
                    if (c = value.charCodeAt(i), 48 > c || c > 57) {
                      valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
                      value = value.slice(0, i);
                      break;
                    }
                  }
                }
              } // If the fill character is not "0", grouping is applied before padding.


              if (comma && !zero) value = group(value, Infinity); // Compute the padding.

              var length = valuePrefix.length + value.length + valueSuffix.length,
                  padding = length < width ? new Array(width - length + 1).join(fill) : ""; // If the fill character is "0", grouping is applied after padding.

              if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; // Reconstruct the final output based on the desired alignment.

              switch (align) {
                case "<":
                  value = valuePrefix + value + valueSuffix + padding;
                  break;

                case "=":
                  value = valuePrefix + padding + value + valueSuffix;
                  break;

                case "^":
                  value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
                  break;

                default:
                  value = padding + valuePrefix + value + valueSuffix;
                  break;
              }

              return numerals(value);
            }

            format.toString = function () {
              return specifier + "";
            };

            return format;
          }

          function formatPrefix(specifier, value) {
            var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
                e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,
                k = Math.pow(10, -e),
                prefix = prefixes[8 + e / 3];
            return function (value) {
              return f(k * value) + prefix;
            };
          }

          return {
            format: newFormat,
            formatPrefix: formatPrefix
          };
        }

        var locale;
        var format;
        var formatPrefix;
        defaultLocale({
          thousands: ",",
          grouping: [3],
          currency: ["$", ""]
        });
        function defaultLocale(definition) {
          locale = formatLocale(definition);
          format = locale.format;
          formatPrefix = locale.formatPrefix;
          return locale;
        }

        function precisionFixed (step) {
          return Math.max(0, -exponent(Math.abs(step)));
        }

        function precisionPrefix (step, value) {
          return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
        }

        function precisionRound (step, max) {
          step = Math.abs(step), max = Math.abs(max) - step;
          return Math.max(0, exponent(max) - exponent(step)) + 1;
        }

        function tickFormat(start, stop, count, specifier) {
          var step = tickStep(start, stop, count),
              precision;
          specifier = formatSpecifier(specifier == null ? ",f" : specifier);

          switch (specifier.type) {
            case "s":
              {
                var value = Math.max(Math.abs(start), Math.abs(stop));
                if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
                return formatPrefix(specifier, value);
              }

            case "":
            case "e":
            case "g":
            case "p":
            case "r":
              {
                if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
                break;
              }

            case "f":
            case "%":
              {
                if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
                break;
              }
          }

          return format(specifier);
        }

        function linearish(scale) {
          var domain = scale.domain;

          scale.ticks = function (count) {
            var d = domain();
            return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
          };

          scale.tickFormat = function (count, specifier) {
            var d = domain();
            return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
          };

          scale.nice = function (count) {
            if (count == null) count = 10;
            var d = domain();
            var i0 = 0;
            var i1 = d.length - 1;
            var start = d[i0];
            var stop = d[i1];
            var prestep;
            var step;
            var maxIter = 10;

            if (stop < start) {
              step = start, start = stop, stop = step;
              step = i0, i0 = i1, i1 = step;
            }

            while (maxIter-- > 0) {
              step = tickIncrement(start, stop, count);

              if (step === prestep) {
                d[i0] = start;
                d[i1] = stop;
                return domain(d);
              } else if (step > 0) {
                start = Math.floor(start / step) * step;
                stop = Math.ceil(stop / step) * step;
              } else if (step < 0) {
                start = Math.ceil(start * step) / step;
                stop = Math.floor(stop * step) / step;
              } else {
                break;
              }

              prestep = step;
            }

            return scale;
          };

          return scale;
        }
        function linear() {
          var scale = continuous();

          scale.copy = function () {
            return copy(scale, linear());
          };

          initRange.apply(scale, arguments);
          return linearish(scale);
        }

        // eslint-disable-next-line es/no-math-expm1 -- safe
        var $expm1 = Math.expm1;
        var exp$1 = Math.exp;

        // `Math.expm1` method implementation
        // https://tc39.es/ecma262/#sec-math.expm1
        var mathExpm1 = (!$expm1
          // Old FF bug
          || $expm1(10) > 22025.465794806719 || $expm1(10) < 22025.4657948067165168
          // Tor Browser bug
          || $expm1(-2e-17) != -2e-17
        ) ? function expm1(x) {
          return (x = +x) == 0 ? x : x > -1e-6 && x < 1e-6 ? x + x * x / 2 : exp$1(x) - 1;
        } : $expm1;

        function quantize() {
          var x0 = 0,
              x1 = 1,
              n = 1,
              domain = [0.5],
              range = [0, 1],
              unknown;

          function scale(x) {
            return x != null && x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
          }

          function rescale() {
            var i = -1;
            domain = new Array(n);

            while (++i < n) {
              domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
            }

            return scale;
          }

          scale.domain = function (_) {
            var _ref, _ref2;

            return arguments.length ? ((_ref = _, _ref2 = _slicedToArray(_ref, 2), x0 = _ref2[0], x1 = _ref2[1], _ref), x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
          };

          scale.range = function (_) {
            return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();
          };

          scale.invertExtent = function (y) {
            var i = range.indexOf(y);
            return i < 0 ? [NaN, NaN] : i < 1 ? [x0, domain[0]] : i >= n ? [domain[n - 1], x1] : [domain[i - 1], domain[i]];
          };

          scale.unknown = function (_) {
            return arguments.length ? (unknown = _, scale) : scale;
          };

          scale.thresholds = function () {
            return domain.slice();
          };

          scale.copy = function () {
            return quantize().domain([x0, x1]).range(range).unknown(unknown);
          };

          return initRange.apply(linearish(scale), arguments);
        }

        // https://github.com/tc39/proposal-string-pad-start-end




        var ceil = Math.ceil;

        // `String.prototype.{ padStart, padEnd }` methods implementation
        var createMethod = function (IS_END) {
          return function ($this, maxLength, fillString) {
            var S = String(requireObjectCoercible($this));
            var stringLength = S.length;
            var fillStr = fillString === undefined ? ' ' : String(fillString);
            var intMaxLength = toLength(maxLength);
            var fillLen, stringFiller;
            if (intMaxLength <= stringLength || fillStr == '') return S;
            fillLen = intMaxLength - stringLength;
            stringFiller = stringRepeat.call(fillStr, ceil(fillLen / fillStr.length));
            if (stringFiller.length > fillLen) stringFiller = stringFiller.slice(0, fillLen);
            return IS_END ? S + stringFiller : stringFiller + S;
          };
        };

        var stringPad = {
          // `String.prototype.padStart` method
          // https://tc39.es/ecma262/#sec-string.prototype.padstart
          start: createMethod(false),
          // `String.prototype.padEnd` method
          // https://tc39.es/ecma262/#sec-string.prototype.padend
          end: createMethod(true)
        };

        var padStart = stringPad.start;

        var abs$1 = Math.abs;
        var DatePrototype = Date.prototype;
        var getTime = DatePrototype.getTime;
        var nativeDateToISOString = DatePrototype.toISOString;

        // `Date.prototype.toISOString` method implementation
        // https://tc39.es/ecma262/#sec-date.prototype.toisostring
        // PhantomJS / old WebKit fails here:
        var dateToIsoString = (fails(function () {
          return nativeDateToISOString.call(new Date(-5e13 - 1)) != '0385-07-25T07:06:39.999Z';
        }) || !fails(function () {
          nativeDateToISOString.call(new Date(NaN));
        })) ? function toISOString() {
          if (!isFinite(getTime.call(this))) throw RangeError('Invalid time value');
          var date = this;
          var year = date.getUTCFullYear();
          var milliseconds = date.getUTCMilliseconds();
          var sign = year < 0 ? '-' : year > 9999 ? '+' : '';
          return sign + padStart(abs$1(year), sign ? 6 : 4, 0) +
            '-' + padStart(date.getUTCMonth() + 1, 2, 0) +
            '-' + padStart(date.getUTCDate(), 2, 0) +
            'T' + padStart(date.getUTCHours(), 2, 0) +
            ':' + padStart(date.getUTCMinutes(), 2, 0) +
            ':' + padStart(date.getUTCSeconds(), 2, 0) +
            '.' + padStart(milliseconds, 3, 0) +
            'Z';
        } : nativeDateToISOString;

        // `Date.prototype.toISOString` method
        // https://tc39.es/ecma262/#sec-date.prototype.toisostring
        // PhantomJS / old WebKit has a broken implementations
        _export({ target: 'Date', proto: true, forced: Date.prototype.toISOString !== dateToIsoString }, {
          toISOString: dateToIsoString
        });

        function behaviorBreathe() {
          var duration = 800;
          var steps = 4;
          var selector = '.selected.shadow, .selected .shadow';

          var _selected = select(null);

          var _classed = '';
          var _params = {};
          var _done = false;

          var _timer;

          function ratchetyInterpolator(a, b, steps, units) {
            a = parseFloat(a);
            b = parseFloat(b);
            var sample = quantize().domain([0, 1]).range(d3_quantize(d3_interpolateNumber(a, b), steps));
            return function (t) {
              return String(sample(t)) + (units || '');
            };
          }

          function reset(selection) {
            selection.style('stroke-opacity', null).style('stroke-width', null).style('fill-opacity', null).style('r', null);
          }

          function setAnimationParams(transition, fromTo) {
            var toFrom = fromTo === 'from' ? 'to' : 'from';
            transition.styleTween('stroke-opacity', function (d) {
              return ratchetyInterpolator(_params[d.id][toFrom].opacity, _params[d.id][fromTo].opacity, steps);
            }).styleTween('stroke-width', function (d) {
              return ratchetyInterpolator(_params[d.id][toFrom].width, _params[d.id][fromTo].width, steps, 'px');
            }).styleTween('fill-opacity', function (d) {
              return ratchetyInterpolator(_params[d.id][toFrom].opacity, _params[d.id][fromTo].opacity, steps);
            }).styleTween('r', function (d) {
              return ratchetyInterpolator(_params[d.id][toFrom].width, _params[d.id][fromTo].width, steps, 'px');
            });
          }

          function calcAnimationParams(selection) {
            selection.call(reset).each(function (d) {
              var s = select(this);
              var tag = s.node().tagName;
              var p = {
                'from': {},
                'to': {}
              };
              var opacity;
              var width; // determine base opacity and width

              if (tag === 'circle') {
                opacity = parseFloat(s.style('fill-opacity') || 0.5);
                width = parseFloat(s.style('r') || 15.5);
              } else {
                opacity = parseFloat(s.style('stroke-opacity') || 0.7);
                width = parseFloat(s.style('stroke-width') || 10);
              } // calculate from/to interpolation params..


              p.tag = tag;
              p.from.opacity = opacity * 0.6;
              p.to.opacity = opacity * 1.25;
              p.from.width = width * 0.7;
              p.to.width = width * (tag === 'circle' ? 1.5 : 1);
              _params[d.id] = p;
            });
          }

          function run(surface, fromTo) {
            var toFrom = fromTo === 'from' ? 'to' : 'from';
            var currSelected = surface.selectAll(selector);
            var currClassed = surface.attr('class');

            if (_done || currSelected.empty()) {
              _selected.call(reset);

              _selected = select(null);
              return;
            }

            if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
              _selected.call(reset);

              _classed = currClassed;
              _selected = currSelected.call(calcAnimationParams);
            }

            var didCallNextRun = false;

            _selected.transition().duration(duration).call(setAnimationParams, fromTo).on('end', function () {
              // `end` event is called for each selected element, but we want
              // it to run only once
              if (!didCallNextRun) {
                surface.call(run, toFrom);
                didCallNextRun = true;
              } // if entity was deselected, remove breathe styling


              if (!select(this).classed('selected')) {
                reset(select(this));
              }
            });
          }

          function behavior(surface) {
            _done = false;
            _timer = timer(function () {
              // wait for elements to actually become selected
              if (surface.selectAll(selector).empty()) {
                return false;
              }

              surface.call(run, 'from');

              _timer.stop();

              return true;
            }, 20);
          }

          behavior.restartIfNeeded = function (surface) {
            if (_selected.empty()) {
              surface.call(run, 'from');

              if (_timer) {
                _timer.stop();
              }
            }
          };

          behavior.off = function () {
            _done = true;

            if (_timer) {
              _timer.stop();
            }

            _selected.interrupt().call(reset);
          };

          return behavior;
        }

        /* Creates a keybinding behavior for an operation */
        function behaviorOperation(context) {
          var _operation;

          function keypress(d3_event) {
            // prevent operations during low zoom selection
            if (!context.map().withinEditableZoom()) return;
            if (_operation.availableForKeypress && !_operation.availableForKeypress()) return;
            d3_event.preventDefault();

            var disabled = _operation.disabled();

            if (disabled) {
              context.ui().flash.duration(4000).iconName('#iD-operation-' + _operation.id).iconClass('operation disabled').label(_operation.tooltip)();
            } else {
              context.ui().flash.duration(2000).iconName('#iD-operation-' + _operation.id).iconClass('operation').label(_operation.annotation() || _operation.title)();
              if (_operation.point) _operation.point(null);

              _operation();
            }
          }

          function behavior() {
            if (_operation && _operation.available()) {
              context.keybinding().on(_operation.keys, keypress);
            }

            return behavior;
          }

          behavior.off = function () {
            context.keybinding().off(_operation.keys);
          };

          behavior.which = function (_) {
            if (!arguments.length) return _operation;
            _operation = _;
            return behavior;
          };

          return behavior;
        }

        function operationCircularize(context, selectedIDs) {
          var _extent;

          var _actions = selectedIDs.map(getAction).filter(Boolean);

          var _amount = _actions.length === 1 ? 'single' : 'multiple';

          var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
            return n.loc;
          });

          function getAction(entityID) {
            var entity = context.entity(entityID);
            if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) return null;

            if (!_extent) {
              _extent = entity.extent(context.graph());
            } else {
              _extent = _extent.extend(entity.extent(context.graph()));
            }

            return actionCircularize(entityID, context.projection);
          }

          var operation = function operation() {
            if (!_actions.length) return;

            var combinedAction = function combinedAction(graph, t) {
              _actions.forEach(function (action) {
                if (!action.disabled(graph)) {
                  graph = action(graph, t);
                }
              });

              return graph;
            };

            combinedAction.transitionable = true;
            context.perform(combinedAction, operation.annotation());
            window.setTimeout(function () {
              context.validator().validate();
            }, 300); // after any transition
          };

          operation.available = function () {
            return _actions.length && selectedIDs.length === _actions.length;
          }; // don't cache this because the visible extent could change


          operation.disabled = function () {
            if (!_actions.length) return '';

            var actionDisableds = _actions.map(function (action) {
              return action.disabled(context.graph());
            }).filter(Boolean);

            if (actionDisableds.length === _actions.length) {
              // none of the features can be circularized
              if (new Set(actionDisableds).size > 1) {
                return 'multiple_blockers';
              }

              return actionDisableds[0];
            } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
              return 'too_large';
            } else if (someMissing()) {
              return 'not_downloaded';
            } else if (selectedIDs.some(context.hasHiddenConnections)) {
              return 'connected_to_hidden';
            }

            return false;

            function someMissing() {
              if (context.inIntro()) return false;
              var osm = context.connection();

              if (osm) {
                var missing = _coords.filter(function (loc) {
                  return !osm.isDataLoaded(loc);
                });

                if (missing.length) {
                  missing.forEach(function (loc) {
                    context.loadTileAtLoc(loc);
                  });
                  return true;
                }
              }

              return false;
            }
          };

          operation.tooltip = function () {
            var disable = operation.disabled();
            return disable ? _t('operations.circularize.' + disable + '.' + _amount) : _t('operations.circularize.description.' + _amount);
          };

          operation.annotation = function () {
            return _t('operations.circularize.annotation.feature', {
              n: _actions.length
            });
          };

          operation.id = 'circularize';
          operation.keys = [_t('operations.circularize.key')];
          operation.title = _t('operations.circularize.title');
          operation.behavior = behaviorOperation(context).which(operation);
          return operation;
        }

        // For example, ⌘Z -> Ctrl+Z

        var uiCmd = function uiCmd(code) {
          var detected = utilDetect();

          if (detected.os === 'mac') {
            return code;
          }

          if (detected.os === 'win') {
            if (code === '⌘⇧Z') return 'Ctrl+Y';
          }

          var result = '',
              replacements = {
            '⌘': 'Ctrl',
            '⇧': 'Shift',
            '⌥': 'Alt',
            '⌫': 'Backspace',
            '⌦': 'Delete'
          };

          for (var i = 0; i < code.length; i++) {
            if (code[i] in replacements) {
              result += replacements[code[i]] + (i < code.length - 1 ? '+' : '');
            } else {
              result += code[i];
            }
          }

          return result;
        }; // return a display-focused string for a given keyboard code

        uiCmd.display = function (code) {
          if (code.length !== 1) return code;
          var detected = utilDetect();
          var mac = detected.os === 'mac';
          var replacements = {
            '⌘': mac ? '⌘ ' + _t('shortcuts.key.cmd') : _t('shortcuts.key.ctrl'),
            '⇧': mac ? '⇧ ' + _t('shortcuts.key.shift') : _t('shortcuts.key.shift'),
            '⌥': mac ? '⌥ ' + _t('shortcuts.key.option') : _t('shortcuts.key.alt'),
            '⌃': mac ? '⌃ ' + _t('shortcuts.key.ctrl') : _t('shortcuts.key.ctrl'),
            '⌫': mac ? '⌫ ' + _t('shortcuts.key.delete') : _t('shortcuts.key.backspace'),
            '⌦': mac ? '⌦ ' + _t('shortcuts.key.del') : _t('shortcuts.key.del'),
            '↖': mac ? '↖ ' + _t('shortcuts.key.pgup') : _t('shortcuts.key.pgup'),
            '↘': mac ? '↘ ' + _t('shortcuts.key.pgdn') : _t('shortcuts.key.pgdn'),
            '⇞': mac ? '⇞ ' + _t('shortcuts.key.home') : _t('shortcuts.key.home'),
            '⇟': mac ? '⇟ ' + _t('shortcuts.key.end') : _t('shortcuts.key.end'),
            '↵': mac ? '⏎ ' + _t('shortcuts.key.return') : _t('shortcuts.key.enter'),
            '⎋': mac ? '⎋ ' + _t('shortcuts.key.esc') : _t('shortcuts.key.esc'),
            '☰': mac ? '☰ ' + _t('shortcuts.key.menu') : _t('shortcuts.key.menu')
          };
          return replacements[code] || code;
        };

        function operationDelete(context, selectedIDs) {
          var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
          var action = actionDeleteMultiple(selectedIDs);
          var nodes = utilGetAllNodes(selectedIDs, context.graph());
          var coords = nodes.map(function (n) {
            return n.loc;
          });
          var extent = utilTotalExtent(selectedIDs, context.graph());

          var operation = function operation() {
            var nextSelectedID;
            var nextSelectedLoc;

            if (selectedIDs.length === 1) {
              var id = selectedIDs[0];
              var entity = context.entity(id);
              var geometry = entity.geometry(context.graph());
              var parents = context.graph().parentWays(entity);
              var parent = parents[0]; // Select the next closest node in the way.

              if (geometry === 'vertex') {
                var nodes = parent.nodes;
                var i = nodes.indexOf(id);

                if (i === 0) {
                  i++;
                } else if (i === nodes.length - 1) {
                  i--;
                } else {
                  var a = geoSphericalDistance(entity.loc, context.entity(nodes[i - 1]).loc);
                  var b = geoSphericalDistance(entity.loc, context.entity(nodes[i + 1]).loc);
                  i = a < b ? i - 1 : i + 1;
                }

                nextSelectedID = nodes[i];
                nextSelectedLoc = context.entity(nextSelectedID).loc;
              }
            }

            context.perform(action, operation.annotation());
            context.validator().validate();

            if (nextSelectedID && nextSelectedLoc) {
              if (context.hasEntity(nextSelectedID)) {
                context.enter(modeSelect(context, [nextSelectedID]).follow(true));
              } else {
                context.map().centerEase(nextSelectedLoc);
                context.enter(modeBrowse(context));
              }
            } else {
              context.enter(modeBrowse(context));
            }
          };

          operation.available = function () {
            return true;
          };

          operation.disabled = function () {
            if (extent.percentContainedIn(context.map().extent()) < 0.8) {
              return 'too_large';
            } else if (someMissing()) {
              return 'not_downloaded';
            } else if (selectedIDs.some(context.hasHiddenConnections)) {
              return 'connected_to_hidden';
            } else if (selectedIDs.some(protectedMember)) {
              return 'part_of_relation';
            } else if (selectedIDs.some(incompleteRelation)) {
              return 'incomplete_relation';
            } else if (selectedIDs.some(hasWikidataTag)) {
              return 'has_wikidata_tag';
            }

            return false;

            function someMissing() {
              if (context.inIntro()) return false;
              var osm = context.connection();

              if (osm) {
                var missing = coords.filter(function (loc) {
                  return !osm.isDataLoaded(loc);
                });

                if (missing.length) {
                  missing.forEach(function (loc) {
                    context.loadTileAtLoc(loc);
                  });
                  return true;
                }
              }

              return false;
            }

            function hasWikidataTag(id) {
              var entity = context.entity(id);
              return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
            }

            function incompleteRelation(id) {
              var entity = context.entity(id);
              return entity.type === 'relation' && !entity.isComplete(context.graph());
            }

            function protectedMember(id) {
              var entity = context.entity(id);
              if (entity.type !== 'way') return false;
              var parents = context.graph().parentRelations(entity);

              for (var i = 0; i < parents.length; i++) {
                var parent = parents[i];
                var type = parent.tags.type;
                var role = parent.memberById(id).role || 'outer';

                if (type === 'route' || type === 'boundary' || type === 'multipolygon' && role === 'outer') {
                  return true;
                }
              }

              return false;
            }
          };

          operation.tooltip = function () {
            var disable = operation.disabled();
            return disable ? _t('operations.delete.' + disable + '.' + multi) : _t('operations.delete.description.' + multi);
          };

          operation.annotation = function () {
            return selectedIDs.length === 1 ? _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.delete.annotation.feature', {
              n: selectedIDs.length
            });
          };

          operation.id = 'delete';
          operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
          operation.title = _t('operations.delete.title');
          operation.behavior = behaviorOperation(context).which(operation);
          return operation;
        }

        function operationOrthogonalize(context, selectedIDs) {
          var _extent;

          var _type;

          var _actions = selectedIDs.map(chooseAction).filter(Boolean);

          var _amount = _actions.length === 1 ? 'single' : 'multiple';

          var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
            return n.loc;
          });

          function chooseAction(entityID) {
            var entity = context.entity(entityID);
            var geometry = entity.geometry(context.graph());

            if (!_extent) {
              _extent = entity.extent(context.graph());
            } else {
              _extent = _extent.extend(entity.extent(context.graph()));
            } // square a line/area


            if (entity.type === 'way' && new Set(entity.nodes).size > 2) {
              if (_type && _type !== 'feature') return null;
              _type = 'feature';
              return actionOrthogonalize(entityID, context.projection); // square a single vertex
            } else if (geometry === 'vertex') {
              if (_type && _type !== 'corner') return null;
              _type = 'corner';
              var graph = context.graph();
              var parents = graph.parentWays(entity);

              if (parents.length === 1) {
                var way = parents[0];

                if (way.nodes.indexOf(entityID) !== -1) {
                  return actionOrthogonalize(way.id, context.projection, entityID);
                }
              }
            }

            return null;
          }

          var operation = function operation() {
            if (!_actions.length) return;

            var combinedAction = function combinedAction(graph, t) {
              _actions.forEach(function (action) {
                if (!action.disabled(graph)) {
                  graph = action(graph, t);
                }
              });

              return graph;
            };

            combinedAction.transitionable = true;
            context.perform(combinedAction, operation.annotation());
            window.setTimeout(function () {
              context.validator().validate();
            }, 300); // after any transition
          };

          operation.available = function () {
            return _actions.length && selectedIDs.length === _actions.length;
          }; // don't cache this because the visible extent could change


          operation.disabled = function () {
            if (!_actions.length) return '';

            var actionDisableds = _actions.map(function (action) {
              return action.disabled(context.graph());
            }).filter(Boolean);

            if (actionDisableds.length === _actions.length) {
              // none of the features can be squared
              if (new Set(actionDisableds).size > 1) {
                return 'multiple_blockers';
              }

              return actionDisableds[0];
            } else if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
              return 'too_large';
            } else if (someMissing()) {
              return 'not_downloaded';
            } else if (selectedIDs.some(context.hasHiddenConnections)) {
              return 'connected_to_hidden';
            }

            return false;

            function someMissing() {
              if (context.inIntro()) return false;
              var osm = context.connection();

              if (osm) {
                var missing = _coords.filter(function (loc) {
                  return !osm.isDataLoaded(loc);
                });

                if (missing.length) {
                  missing.forEach(function (loc) {
                    context.loadTileAtLoc(loc);
                  });
                  return true;
                }
              }

              return false;
            }
          };

          operation.tooltip = function () {
            var disable = operation.disabled();
            return disable ? _t('operations.orthogonalize.' + disable + '.' + _amount) : _t('operations.orthogonalize.description.' + _type + '.' + _amount);
          };

          operation.annotation = function () {
            return _t('operations.orthogonalize.annotation.' + _type, {
              n: _actions.length
            });
          };

          operation.id = 'orthogonalize';
          operation.keys = [_t('operations.orthogonalize.key')];
          operation.title = _t('operations.orthogonalize.title');
          operation.behavior = behaviorOperation(context).which(operation);
          return operation;
        }

        function operationReflectShort(context, selectedIDs) {
          return operationReflect(context, selectedIDs, 'short');
        }
        function operationReflectLong(context, selectedIDs) {
          return operationReflect(context, selectedIDs, 'long');
        }
        function operationReflect(context, selectedIDs, axis) {
          axis = axis || 'long';
          var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
          var nodes = utilGetAllNodes(selectedIDs, context.graph());
          var coords = nodes.map(function (n) {
            return n.loc;
          });
          var extent = utilTotalExtent(selectedIDs, context.graph());

          var operation = function operation() {
            var action = actionReflect(selectedIDs, context.projection).useLongAxis(Boolean(axis === 'long'));
            context.perform(action, operation.annotation());
            window.setTimeout(function () {
              context.validator().validate();
            }, 300); // after any transition
          };

          operation.available = function () {
            return nodes.length >= 3;
          }; // don't cache this because the visible extent could change


          operation.disabled = function () {
            if (extent.percentContainedIn(context.map().extent()) < 0.8) {
              return 'too_large';
            } else if (someMissing()) {
              return 'not_downloaded';
            } else if (selectedIDs.some(context.hasHiddenConnections)) {
              return 'connected_to_hidden';
            } else if (selectedIDs.some(incompleteRelation)) {
              return 'incomplete_relation';
            }

            return false;

            function someMissing() {
              if (context.inIntro()) return false;
              var osm = context.connection();

              if (osm) {
                var missing = coords.filter(function (loc) {
                  return !osm.isDataLoaded(loc);
                });

                if (missing.length) {
                  missing.forEach(function (loc) {
                    context.loadTileAtLoc(loc);
                  });
                  return true;
                }
              }

              return false;
            }

            function incompleteRelation(id) {
              var entity = context.entity(id);
              return entity.type === 'relation' && !entity.isComplete(context.graph());
            }
          };

          operation.tooltip = function () {
            var disable = operation.disabled();
            return disable ? _t('operations.reflect.' + disable + '.' + multi) : _t('operations.reflect.description.' + axis + '.' + multi);
          };

          operation.annotation = function () {
            return _t('operations.reflect.annotation.' + axis + '.feature', {
              n: selectedIDs.length
            });
          };

          operation.id = 'reflect-' + axis;
          operation.keys = [_t('operations.reflect.key.' + axis)];
          operation.title = _t('operations.reflect.title.' + axis);
          operation.behavior = behaviorOperation(context).which(operation);
          return operation;
        }

        function operationMove(context, selectedIDs) {
          var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
          var nodes = utilGetAllNodes(selectedIDs, context.graph());
          var coords = nodes.map(function (n) {
            return n.loc;
          });
          var extent = utilTotalExtent(selectedIDs, context.graph());

          var operation = function operation() {
            context.enter(modeMove(context, selectedIDs));
          };

          operation.available = function () {
            return selectedIDs.length > 0;
          };

          operation.disabled = function () {
            if (extent.percentContainedIn(context.map().extent()) < 0.8) {
              return 'too_large';
            } else if (someMissing()) {
              return 'not_downloaded';
            } else if (selectedIDs.some(context.hasHiddenConnections)) {
              return 'connected_to_hidden';
            } else if (selectedIDs.some(incompleteRelation)) {
              return 'incomplete_relation';
            }

            return false;

            function someMissing() {
              if (context.inIntro()) return false;
              var osm = context.connection();

              if (osm) {
                var missing = coords.filter(function (loc) {
                  return !osm.isDataLoaded(loc);
                });

                if (missing.length) {
                  missing.forEach(function (loc) {
                    context.loadTileAtLoc(loc);
                  });
                  return true;
                }
              }

              return false;
            }

            function incompleteRelation(id) {
              var entity = context.entity(id);
              return entity.type === 'relation' && !entity.isComplete(context.graph());
            }
          };

          operation.tooltip = function () {
            var disable = operation.disabled();
            return disable ? _t('operations.move.' + disable + '.' + multi) : _t('operations.move.description.' + multi);
          };

          operation.annotation = function () {
            return selectedIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.move.annotation.feature', {
              n: selectedIDs.length
            });
          };

          operation.id = 'move';
          operation.keys = [_t('operations.move.key')];
          operation.title = _t('operations.move.title');
          operation.behavior = behaviorOperation(context).which(operation);
          operation.mouseOnly = true;
          return operation;
        }

        function modeRotate(context, entityIDs) {
          var _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeMove

          var mode = {
            id: 'rotate',
            button: 'browse'
          };
          var keybinding = utilKeybinding('rotate');
          var behaviors = [behaviorEdit(context), operationCircularize(context, entityIDs).behavior, operationDelete(context, entityIDs).behavior, operationMove(context, entityIDs).behavior, operationOrthogonalize(context, entityIDs).behavior, operationReflectLong(context, entityIDs).behavior, operationReflectShort(context, entityIDs).behavior];
          var annotation = entityIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(entityIDs[0])) : _t('operations.rotate.annotation.feature', {
            n: entityIDs.length
          });

          var _prevGraph;

          var _prevAngle;

          var _prevTransform;

          var _pivot; // use pointer events on supported platforms; fallback to mouse events


          var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

          function doRotate(d3_event) {
            var fn;

            if (context.graph() !== _prevGraph) {
              fn = context.perform;
            } else {
              fn = context.replace;
            } // projection changed, recalculate _pivot


            var projection = context.projection;
            var currTransform = projection.transform();

            if (!_prevTransform || currTransform.k !== _prevTransform.k || currTransform.x !== _prevTransform.x || currTransform.y !== _prevTransform.y) {
              var nodes = utilGetAllNodes(entityIDs, context.graph());
              var points = nodes.map(function (n) {
                return projection(n.loc);
              });
              _pivot = getPivot(points);
              _prevAngle = undefined;
            }

            var currMouse = context.map().mouse(d3_event);
            var currAngle = Math.atan2(currMouse[1] - _pivot[1], currMouse[0] - _pivot[0]);
            if (typeof _prevAngle === 'undefined') _prevAngle = currAngle;
            var delta = currAngle - _prevAngle;
            fn(actionRotate(entityIDs, _pivot, delta, projection));
            _prevTransform = currTransform;
            _prevAngle = currAngle;
            _prevGraph = context.graph();
          }

          function getPivot(points) {
            var _pivot;

            if (points.length === 1) {
              _pivot = points[0];
            } else if (points.length === 2) {
              _pivot = geoVecInterp(points[0], points[1], 0.5);
            } else {
              var polygonHull = d3_polygonHull(points);

              if (polygonHull.length === 2) {
                _pivot = geoVecInterp(points[0], points[1], 0.5);
              } else {
                _pivot = d3_polygonCentroid(d3_polygonHull(points));
              }
            }

            return _pivot;
          }

          function finish(d3_event) {
            d3_event.stopPropagation();
            context.replace(actionNoop(), annotation);
            context.enter(modeSelect(context, entityIDs));
          }

          function cancel() {
            if (_prevGraph) context.pop(); // remove the rotate

            context.enter(modeSelect(context, entityIDs));
          }

          function undone() {
            context.enter(modeBrowse(context));
          }

          mode.enter = function () {
            _prevGraph = null;
            context.features().forceVisible(entityIDs);
            behaviors.forEach(context.install);
            var downEvent;
            context.surface().on(_pointerPrefix + 'down.modeRotate', function (d3_event) {
              downEvent = d3_event;
            });
            select(window).on(_pointerPrefix + 'move.modeRotate', doRotate, true).on(_pointerPrefix + 'up.modeRotate', function (d3_event) {
              if (!downEvent) return;
              var mapNode = context.container().select('.main-map').node();
              var pointGetter = utilFastMouse(mapNode);
              var p1 = pointGetter(downEvent);
              var p2 = pointGetter(d3_event);
              var dist = geoVecLength(p1, p2);
              if (dist <= _tolerancePx) finish(d3_event);
              downEvent = null;
            }, true);
            context.history().on('undone.modeRotate', undone);
            keybinding.on('⎋', cancel).on('↩', finish);
            select(document).call(keybinding);
          };

          mode.exit = function () {
            behaviors.forEach(context.uninstall);
            context.surface().on(_pointerPrefix + 'down.modeRotate', null);
            select(window).on(_pointerPrefix + 'move.modeRotate', null, true).on(_pointerPrefix + 'up.modeRotate', null, true);
            context.history().on('undone.modeRotate', null);
            select(document).call(keybinding.unbind);
            context.features().forceVisible([]);
          };

          mode.selectedIDs = function () {
            if (!arguments.length) return entityIDs; // no assign

            return mode;
          };

          return mode;
        }

        function operationRotate(context, selectedIDs) {
          var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
          var nodes = utilGetAllNodes(selectedIDs, context.graph());
          var coords = nodes.map(function (n) {
            return n.loc;
          });
          var extent = utilTotalExtent(selectedIDs, context.graph());

          var operation = function operation() {
            context.enter(modeRotate(context, selectedIDs));
          };

          operation.available = function () {
            return nodes.length >= 2;
          };

          operation.disabled = function () {
            if (extent.percentContainedIn(context.map().extent()) < 0.8) {
              return 'too_large';
            } else if (someMissing()) {
              return 'not_downloaded';
            } else if (selectedIDs.some(context.hasHiddenConnections)) {
              return 'connected_to_hidden';
            } else if (selectedIDs.some(incompleteRelation)) {
              return 'incomplete_relation';
            }

            return false;

            function someMissing() {
              if (context.inIntro()) return false;
              var osm = context.connection();

              if (osm) {
                var missing = coords.filter(function (loc) {
                  return !osm.isDataLoaded(loc);
                });

                if (missing.length) {
                  missing.forEach(function (loc) {
                    context.loadTileAtLoc(loc);
                  });
                  return true;
                }
              }

              return false;
            }

            function incompleteRelation(id) {
              var entity = context.entity(id);
              return entity.type === 'relation' && !entity.isComplete(context.graph());
            }
          };

          operation.tooltip = function () {
            var disable = operation.disabled();
            return disable ? _t('operations.rotate.' + disable + '.' + multi) : _t('operations.rotate.description.' + multi);
          };

          operation.annotation = function () {
            return selectedIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.rotate.annotation.feature', {
              n: selectedIDs.length
            });
          };

          operation.id = 'rotate';
          operation.keys = [_t('operations.rotate.key')];
          operation.title = _t('operations.rotate.title');
          operation.behavior = behaviorOperation(context).which(operation);
          operation.mouseOnly = true;
          return operation;
        }

        function modeMove(context, entityIDs, baseGraph) {
          var _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeRotate

          var mode = {
            id: 'move',
            button: 'browse'
          };
          var keybinding = utilKeybinding('move');
          var behaviors = [behaviorEdit(context), operationCircularize(context, entityIDs).behavior, operationDelete(context, entityIDs).behavior, operationOrthogonalize(context, entityIDs).behavior, operationReflectLong(context, entityIDs).behavior, operationReflectShort(context, entityIDs).behavior, operationRotate(context, entityIDs).behavior];
          var annotation = entityIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(entityIDs[0])) : _t('operations.move.annotation.feature', {
            n: entityIDs.length
          });

          var _prevGraph;

          var _cache;

          var _origin;

          var _nudgeInterval; // use pointer events on supported platforms; fallback to mouse events


          var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

          function doMove(nudge) {
            nudge = nudge || [0, 0];
            var fn;

            if (_prevGraph !== context.graph()) {
              _cache = {};
              _origin = context.map().mouseCoordinates();
              fn = context.perform;
            } else {
              fn = context.overwrite;
            }

            var currMouse = context.map().mouse();
            var origMouse = context.projection(_origin);
            var delta = geoVecSubtract(geoVecSubtract(currMouse, origMouse), nudge);
            fn(actionMove(entityIDs, delta, context.projection, _cache));
            _prevGraph = context.graph();
          }

          function startNudge(nudge) {
            if (_nudgeInterval) window.clearInterval(_nudgeInterval);
            _nudgeInterval = window.setInterval(function () {
              context.map().pan(nudge);
              doMove(nudge);
            }, 50);
          }

          function stopNudge() {
            if (_nudgeInterval) {
              window.clearInterval(_nudgeInterval);
              _nudgeInterval = null;
            }
          }

          function move() {
            doMove();
            var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());

            if (nudge) {
              startNudge(nudge);
            } else {
              stopNudge();
            }
          }

          function finish(d3_event) {
            d3_event.stopPropagation();
            context.replace(actionNoop(), annotation);
            context.enter(modeSelect(context, entityIDs));
            stopNudge();
          }

          function cancel() {
            if (baseGraph) {
              while (context.graph() !== baseGraph) {
                context.pop();
              } // reset to baseGraph


              context.enter(modeBrowse(context));
            } else {
              if (_prevGraph) context.pop(); // remove the move

              context.enter(modeSelect(context, entityIDs));
            }

            stopNudge();
          }

          function undone() {
            context.enter(modeBrowse(context));
          }

          mode.enter = function () {
            _origin = context.map().mouseCoordinates();
            _prevGraph = null;
            _cache = {};
            context.features().forceVisible(entityIDs);
            behaviors.forEach(context.install);
            var downEvent;
            context.surface().on(_pointerPrefix + 'down.modeMove', function (d3_event) {
              downEvent = d3_event;
            });
            select(window).on(_pointerPrefix + 'move.modeMove', move, true).on(_pointerPrefix + 'up.modeMove', function (d3_event) {
              if (!downEvent) return;
              var mapNode = context.container().select('.main-map').node();
              var pointGetter = utilFastMouse(mapNode);
              var p1 = pointGetter(downEvent);
              var p2 = pointGetter(d3_event);
              var dist = geoVecLength(p1, p2);
              if (dist <= _tolerancePx) finish(d3_event);
              downEvent = null;
            }, true);
            context.history().on('undone.modeMove', undone);
            keybinding.on('⎋', cancel).on('↩', finish);
            select(document).call(keybinding);
          };

          mode.exit = function () {
            stopNudge();
            behaviors.forEach(function (behavior) {
              context.uninstall(behavior);
            });
            context.surface().on(_pointerPrefix + 'down.modeMove', null);
            select(window).on(_pointerPrefix + 'move.modeMove', null, true).on(_pointerPrefix + 'up.modeMove', null, true);
            context.history().on('undone.modeMove', null);
            select(document).call(keybinding.unbind);
            context.features().forceVisible([]);
          };

          mode.selectedIDs = function () {
            if (!arguments.length) return entityIDs; // no assign

            return mode;
          };

          return mode;
        }

        function behaviorPaste(context) {
          function doPaste(d3_event) {
            // prevent paste during low zoom selection
            if (!context.map().withinEditableZoom()) return;
            d3_event.preventDefault();
            var baseGraph = context.graph();
            var mouse = context.map().mouse();
            var projection = context.projection;
            var viewport = geoExtent(projection.clipExtent()).polygon();
            if (!geoPointInPolygon(mouse, viewport)) return;
            var oldIDs = context.copyIDs();
            if (!oldIDs.length) return;
            var extent = geoExtent();
            var oldGraph = context.copyGraph();
            var newIDs = [];
            var action = actionCopyEntities(oldIDs, oldGraph);
            context.perform(action);
            var copies = action.copies();
            var originals = new Set();
            Object.values(copies).forEach(function (entity) {
              originals.add(entity.id);
            });

            for (var id in copies) {
              var oldEntity = oldGraph.entity(id);
              var newEntity = copies[id];

              extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.


              var parents = context.graph().parentWays(newEntity);
              var parentCopied = parents.some(function (parent) {
                return originals.has(parent.id);
              });

              if (!parentCopied) {
                newIDs.push(newEntity.id);
              }
            } // Put pasted objects where mouse pointer is..


            var copyPoint = context.copyLonLat() && projection(context.copyLonLat()) || projection(extent.center());
            var delta = geoVecSubtract(mouse, copyPoint);
            context.perform(actionMove(newIDs, delta, projection));
            context.enter(modeMove(context, newIDs, baseGraph));
          }

          function behavior() {
            context.keybinding().on(uiCmd('⌘V'), doPaste);
            return behavior;
          }

          behavior.off = function () {
            context.keybinding().off(uiCmd('⌘V'));
          };

          return behavior;
        }

        // `String.prototype.repeat` method
        // https://tc39.es/ecma262/#sec-string.prototype.repeat
        _export({ target: 'String', proto: true }, {
          repeat: stringRepeat
        });

        /*
            `behaviorDrag` is like `d3_behavior.drag`, with the following differences:

            * The `origin` function is expected to return an [x, y] tuple rather than an
              {x, y} object.
            * The events are `start`, `move`, and `end`.
              (https://github.com/mbostock/d3/issues/563)
            * The `start` event is not dispatched until the first cursor movement occurs.
              (https://github.com/mbostock/d3/pull/368)
            * The `move` event has a `point` and `delta` [x, y] tuple properties rather
              than `x`, `y`, `dx`, and `dy` properties.
            * The `end` event is not dispatched if no movement occurs.
            * An `off` function is available that unbinds the drag's internal event handlers.
         */

        function behaviorDrag() {
          var dispatch = dispatch$8('start', 'move', 'end'); // see also behaviorSelect

          var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping

          var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981

          var _origin = null;
          var _selector = '';

          var _targetNode;

          var _targetEntity;

          var _surface;

          var _pointerId; // use pointer events on supported platforms; fallback to mouse events


          var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

          var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');

          var d3_event_userSelectSuppress = function d3_event_userSelectSuppress() {
            var selection$1 = selection();
            var select = selection$1.style(d3_event_userSelectProperty);
            selection$1.style(d3_event_userSelectProperty, 'none');
            return function () {
              selection$1.style(d3_event_userSelectProperty, select);
            };
          };

          function pointerdown(d3_event) {
            if (_pointerId) return;
            _pointerId = d3_event.pointerId || 'mouse';
            _targetNode = this; // only force reflow once per drag

            var pointerLocGetter = utilFastMouse(_surface || _targetNode.parentNode);
            var offset;
            var startOrigin = pointerLocGetter(d3_event);
            var started = false;
            var selectEnable = d3_event_userSelectSuppress();
            select(window).on(_pointerPrefix + 'move.drag', pointermove).on(_pointerPrefix + 'up.drag pointercancel.drag', pointerup, true);

            if (_origin) {
              offset = _origin.call(_targetNode, _targetEntity);
              offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
            } else {
              offset = [0, 0];
            }

            d3_event.stopPropagation();

            function pointermove(d3_event) {
              if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
              var p = pointerLocGetter(d3_event);

              if (!started) {
                var dist = geoVecLength(startOrigin, p);
                var tolerance = d3_event.pointerType === 'pen' ? _penTolerancePx : _tolerancePx; // don't start until the drag has actually moved somewhat

                if (dist < tolerance) return;
                started = true;
                dispatch.call('start', this, d3_event, _targetEntity); // Don't send a `move` event in the same cycle as `start` since dragging
                // a midpoint will convert the target to a node.
              } else {
                startOrigin = p;
                d3_event.stopPropagation();
                d3_event.preventDefault();
                var dx = p[0] - startOrigin[0];
                var dy = p[1] - startOrigin[1];
                dispatch.call('move', this, d3_event, _targetEntity, [p[0] + offset[0], p[1] + offset[1]], [dx, dy]);
              }
            }

            function pointerup(d3_event) {
              if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
              _pointerId = null;

              if (started) {
                dispatch.call('end', this, d3_event, _targetEntity);
                d3_event.preventDefault();
              }

              select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
              selectEnable();
            }
          }

          function behavior(selection) {
            var matchesSelector = utilPrefixDOMProperty('matchesSelector');
            var delegate = pointerdown;

            if (_selector) {
              delegate = function delegate(d3_event) {
                var root = this;
                var target = d3_event.target;

                for (; target && target !== root; target = target.parentNode) {
                  var datum = target.__data__;
                  _targetEntity = datum instanceof osmNote ? datum : datum && datum.properties && datum.properties.entity;

                  if (_targetEntity && target[matchesSelector](_selector)) {
                    return pointerdown.call(target, d3_event);
                  }
                }
              };
            }

            selection.on(_pointerPrefix + 'down.drag' + _selector, delegate);
          }

          behavior.off = function (selection) {
            selection.on(_pointerPrefix + 'down.drag' + _selector, null);
          };

          behavior.selector = function (_) {
            if (!arguments.length) return _selector;
            _selector = _;
            return behavior;
          };

          behavior.origin = function (_) {
            if (!arguments.length) return _origin;
            _origin = _;
            return behavior;
          };

          behavior.cancel = function () {
            select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
            return behavior;
          };

          behavior.targetNode = function (_) {
            if (!arguments.length) return _targetNode;
            _targetNode = _;
            return behavior;
          };

          behavior.targetEntity = function (_) {
            if (!arguments.length) return _targetEntity;
            _targetEntity = _;
            return behavior;
          };

          behavior.surface = function (_) {
            if (!arguments.length) return _surface;
            _surface = _;
            return behavior;
          };

          return utilRebind(behavior, dispatch, 'on');
        }

        function modeDragNode(context) {
          var mode = {
            id: 'drag-node',
            button: 'browse'
          };
          var hover = behaviorHover(context).altDisables(true).on('hover', context.ui().sidebar.hover);
          var edit = behaviorEdit(context);

          var _nudgeInterval;

          var _restoreSelectedIDs = [];
          var _wasMidpoint = false;
          var _isCancelled = false;

          var _activeEntity;

          var _startLoc;

          var _lastLoc;

          function startNudge(d3_event, entity, nudge) {
            if (_nudgeInterval) window.clearInterval(_nudgeInterval);
            _nudgeInterval = window.setInterval(function () {
              context.map().pan(nudge);
              doMove(d3_event, entity, nudge);
            }, 50);
          }

          function stopNudge() {
            if (_nudgeInterval) {
              window.clearInterval(_nudgeInterval);
              _nudgeInterval = null;
            }
          }

          function moveAnnotation(entity) {
            return _t('operations.move.annotation.' + entity.geometry(context.graph()));
          }

          function connectAnnotation(nodeEntity, targetEntity) {
            var nodeGeometry = nodeEntity.geometry(context.graph());
            var targetGeometry = targetEntity.geometry(context.graph());

            if (nodeGeometry === 'vertex' && targetGeometry === 'vertex') {
              var nodeParentWayIDs = context.graph().parentWays(nodeEntity);
              var targetParentWayIDs = context.graph().parentWays(targetEntity);
              var sharedParentWays = utilArrayIntersection(nodeParentWayIDs, targetParentWayIDs); // if both vertices are part of the same way

              if (sharedParentWays.length !== 0) {
                // if the nodes are next to each other, they are merged
                if (sharedParentWays[0].areAdjacent(nodeEntity.id, targetEntity.id)) {
                  return _t('operations.connect.annotation.from_vertex.to_adjacent_vertex');
                }

                return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
              }
            }

            return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
          }

          function shouldSnapToNode(target) {
            if (!_activeEntity) return false;
            return _activeEntity.geometry(context.graph()) !== 'vertex' || target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph());
          }

          function origin(entity) {
            return context.projection(entity.loc);
          }

          function keydown(d3_event) {
            if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
              if (context.surface().classed('nope')) {
                context.surface().classed('nope-suppressed', true);
              }

              context.surface().classed('nope', false).classed('nope-disabled', true);
            }
          }

          function keyup(d3_event) {
            if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
              if (context.surface().classed('nope-suppressed')) {
                context.surface().classed('nope', true);
              }

              context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
            }
          }

          function start(d3_event, entity) {
            _wasMidpoint = entity.type === 'midpoint';
            var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
            _isCancelled = !context.editable() || d3_event.shiftKey || hasHidden;

            if (_isCancelled) {
              if (hasHidden) {
                context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('modes.drag_node.connected_to_hidden'))();
              }

              return drag.cancel();
            }

            if (_wasMidpoint) {
              var midpoint = entity;
              entity = osmNode();
              context.perform(actionAddMidpoint(midpoint, entity));
              entity = context.entity(entity.id); // get post-action entity

              var vertex = context.surface().selectAll('.' + entity.id);
              drag.targetNode(vertex.node()).targetEntity(entity);
            } else {
              context.perform(actionNoop());
            }

            _activeEntity = entity;
            _startLoc = entity.loc;
            hover.ignoreVertex(entity.geometry(context.graph()) === 'vertex');
            context.surface().selectAll('.' + _activeEntity.id).classed('active', true);
            context.enter(mode);
          } // related code
          // - `behavior/draw.js` `datum()`


          function datum(d3_event) {
            if (!d3_event || d3_event.altKey) {
              return {};
            } else {
              // When dragging, snap only to touch targets..
              // (this excludes area fills and active drawing elements)
              var d = d3_event.target.__data__;
              return d && d.properties && d.properties.target ? d : {};
            }
          }

          function doMove(d3_event, entity, nudge) {
            nudge = nudge || [0, 0];
            var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
            var currMouse = geoVecSubtract(currPoint, nudge);
            var loc = context.projection.invert(currMouse);
            var target, edge;

            if (!_nudgeInterval) {
              // If not nudging at the edge of the viewport, try to snap..
              // related code
              // - `mode/drag_node.js`     `doMove()`
              // - `behavior/draw.js`      `click()`
              // - `behavior/draw_way.js`  `move()`
              var d = datum(d3_event);
              target = d && d.properties && d.properties.entity;
              var targetLoc = target && target.loc;
              var targetNodes = d && d.properties && d.properties.nodes;

              if (targetLoc) {
                // snap to node/vertex - a point target with `.loc`
                if (shouldSnapToNode(target)) {
                  loc = targetLoc;
                }
              } else if (targetNodes) {
                // snap to way - a line target with `.nodes`
                edge = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, end.id);

                if (edge) {
                  loc = edge.loc;
                }
              }
            }

            context.replace(actionMoveNode(entity.id, loc)); // Below here: validations

            var isInvalid = false; // Check if this connection to `target` could cause relations to break..

            if (target) {
              isInvalid = hasRelationConflict(entity, target, edge, context.graph());
            } // Check if this drag causes the geometry to break..


            if (!isInvalid) {
              isInvalid = hasInvalidGeometry(entity, context.graph());
            }

            var nope = context.surface().classed('nope');

            if (isInvalid === 'relation' || isInvalid === 'restriction') {
              if (!nope) {
                // about to nope - show hint
                context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('operations.connect.' + isInvalid, {
                  relation: _mainPresetIndex.item('type/restriction').name()
                }))();
              }
            } else if (isInvalid) {
              var errorID = isInvalid === 'line' ? 'lines' : 'areas';
              context.ui().flash.duration(3000).iconName('#iD-icon-no').label(_t('self_intersection.error.' + errorID))();
            } else {
              if (nope) {
                // about to un-nope, remove hint
                context.ui().flash.duration(1).label('')();
              }
            }

            var nopeDisabled = context.surface().classed('nope-disabled');

            if (nopeDisabled) {
              context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
            } else {
              context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
            }

            _lastLoc = loc;
          } // Uses `actionConnect.disabled()` to know whether this connection is ok..


          function hasRelationConflict(entity, target, edge, graph) {
            var testGraph = graph.update(); // copy
            // if snapping to way - add midpoint there and consider that the target..

            if (edge) {
              var midpoint = osmNode();
              var action = actionAddMidpoint({
                loc: edge.loc,
                edge: [target.nodes[edge.index - 1], target.nodes[edge.index]]
              }, midpoint);
              testGraph = action(testGraph);
              target = midpoint;
            } // can we connect to it?


            var ids = [entity.id, target.id];
            return actionConnect(ids).disabled(testGraph);
          }

          function hasInvalidGeometry(entity, graph) {
            var parents = graph.parentWays(entity);
            var i, j, k;

            for (i = 0; i < parents.length; i++) {
              var parent = parents[i];
              var nodes = [];
              var activeIndex = null; // which multipolygon ring contains node being dragged
              // test any parent multipolygons for valid geometry

              var relations = graph.parentRelations(parent);

              for (j = 0; j < relations.length; j++) {
                if (!relations[j].isMultipolygon()) continue;
                var rings = osmJoinWays(relations[j].members, graph); // find active ring and test it for self intersections

                for (k = 0; k < rings.length; k++) {
                  nodes = rings[k].nodes;

                  if (nodes.find(function (n) {
                    return n.id === entity.id;
                  })) {
                    activeIndex = k;

                    if (geoHasSelfIntersections(nodes, entity.id)) {
                      return 'multipolygonMember';
                    }
                  }

                  rings[k].coords = nodes.map(function (n) {
                    return n.loc;
                  });
                } // test active ring for intersections with other rings in the multipolygon


                for (k = 0; k < rings.length; k++) {
                  if (k === activeIndex) continue; // make sure active ring doesn't cross passive rings

                  if (geoHasLineIntersections(rings[activeIndex].nodes, rings[k].nodes, entity.id)) {
                    return 'multipolygonRing';
                  }
                }
              } // If we still haven't tested this node's parent way for self-intersections.
              // (because it's not a member of a multipolygon), test it now.


              if (activeIndex === null) {
                nodes = parent.nodes.map(function (nodeID) {
                  return graph.entity(nodeID);
                });

                if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
                  return parent.geometry(graph);
                }
              }
            }

            return false;
          }

          function move(d3_event, entity, point) {
            if (_isCancelled) return;
            d3_event.stopPropagation();
            context.surface().classed('nope-disabled', d3_event.altKey);
            _lastLoc = context.projection.invert(point);
            doMove(d3_event, entity);
            var nudge = geoViewportEdge(point, context.map().dimensions());

            if (nudge) {
              startNudge(d3_event, entity, nudge);
            } else {
              stopNudge();
            }
          }

          function end(d3_event, entity) {
            if (_isCancelled) return;
            var wasPoint = entity.geometry(context.graph()) === 'point';
            var d = datum(d3_event);
            var nope = d && d.properties && d.properties.nope || context.surface().classed('nope');
            var target = d && d.properties && d.properties.entity; // entity to snap to

            if (nope) {
              // bounce back
              context.perform(_actionBounceBack(entity.id, _startLoc));
            } else if (target && target.type === 'way') {
              var choice = geoChooseEdge(context.graph().childNodes(target), context.map().mouse(), context.projection, entity.id);
              context.replace(actionAddMidpoint({
                loc: choice.loc,
                edge: [target.nodes[choice.index - 1], target.nodes[choice.index]]
              }, entity), connectAnnotation(entity, target));
            } else if (target && target.type === 'node' && shouldSnapToNode(target)) {
              context.replace(actionConnect([target.id, entity.id]), connectAnnotation(entity, target));
            } else if (_wasMidpoint) {
              context.replace(actionNoop(), _t('operations.add.annotation.vertex'));
            } else {
              context.replace(actionNoop(), moveAnnotation(entity));
            }

            if (wasPoint) {
              context.enter(modeSelect(context, [entity.id]));
            } else {
              var reselection = _restoreSelectedIDs.filter(function (id) {
                return context.graph().hasEntity(id);
              });

              if (reselection.length) {
                context.enter(modeSelect(context, reselection));
              } else {
                context.enter(modeBrowse(context));
              }
            }
          }

          function _actionBounceBack(nodeID, toLoc) {
            var moveNode = actionMoveNode(nodeID, toLoc);

            var action = function action(graph, t) {
              // last time through, pop off the bounceback perform.
              // it will then overwrite the initial perform with a moveNode that does nothing
              if (t === 1) context.pop();
              return moveNode(graph, t);
            };

            action.transitionable = true;
            return action;
          }

          function cancel() {
            drag.cancel();
            context.enter(modeBrowse(context));
          }

          var drag = behaviorDrag().selector('.layer-touch.points .target').surface(context.container().select('.main-map').node()).origin(origin).on('start', start).on('move', move).on('end', end);

          mode.enter = function () {
            context.install(hover);
            context.install(edit);
            select(window).on('keydown.dragNode', keydown).on('keyup.dragNode', keyup);
            context.history().on('undone.drag-node', cancel);
          };

          mode.exit = function () {
            context.ui().sidebar.hover.cancel();
            context.uninstall(hover);
            context.uninstall(edit);
            select(window).on('keydown.dragNode', null).on('keyup.dragNode', null);
            context.history().on('undone.drag-node', null);
            _activeEntity = null;
            context.surface().classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false).selectAll('.active').classed('active', false);
            stopNudge();
          };

          mode.selectedIDs = function () {
            if (!arguments.length) return _activeEntity ? [_activeEntity.id] : []; // no assign

            return mode;
          };

          mode.activeID = function () {
            if (!arguments.length) return _activeEntity && _activeEntity.id; // no assign

            return mode;
          };

          mode.restoreSelectedIDs = function (_) {
            if (!arguments.length) return _restoreSelectedIDs;
            _restoreSelectedIDs = _;
            return mode;
          };

          mode.behavior = drag;
          return mode;
        }

        // Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829
        var NON_GENERIC = !!nativePromiseConstructor && fails(function () {
          nativePromiseConstructor.prototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ });
        });

        // `Promise.prototype.finally` method
        // https://tc39.es/ecma262/#sec-promise.prototype.finally
        _export({ target: 'Promise', proto: true, real: true, forced: NON_GENERIC }, {
          'finally': function (onFinally) {
            var C = speciesConstructor(this, getBuiltIn('Promise'));
            var isFunction = typeof onFinally == 'function';
            return this.then(
              isFunction ? function (x) {
                return promiseResolve(C, onFinally()).then(function () { return x; });
              } : onFinally,
              isFunction ? function (e) {
                return promiseResolve(C, onFinally()).then(function () { throw e; });
              } : onFinally
            );
          }
        });

        // makes sure that native promise-based APIs `Promise#finally` properly works with patched `Promise#then`
        if (typeof nativePromiseConstructor == 'function') {
          var method = getBuiltIn('Promise').prototype['finally'];
          if (nativePromiseConstructor.prototype['finally'] !== method) {
            redefine(nativePromiseConstructor.prototype, 'finally', method, { unsafe: true });
          }
        }

        function quickselect(arr, k, left, right, compare) {
          quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
        }

        function quickselectStep(arr, k, left, right, compare) {
          while (right > left) {
            if (right - left > 600) {
              var n = right - left + 1;
              var m = k - left + 1;
              var z = Math.log(n);
              var s = 0.5 * Math.exp(2 * z / 3);
              var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
              var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
              var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
              quickselectStep(arr, k, newLeft, newRight, compare);
            }

            var t = arr[k];
            var i = left;
            var j = right;
            swap(arr, left, k);
            if (compare(arr[right], t) > 0) swap(arr, left, right);

            while (i < j) {
              swap(arr, i, j);
              i++;
              j--;

              while (compare(arr[i], t) < 0) {
                i++;
              }

              while (compare(arr[j], t) > 0) {
                j--;
              }
            }

            if (compare(arr[left], t) === 0) swap(arr, left, j);else {
              j++;
              swap(arr, j, right);
            }
            if (j <= k) left = j + 1;
            if (k <= j) right = j - 1;
          }
        }

        function swap(arr, i, j) {
          var tmp = arr[i];
          arr[i] = arr[j];
          arr[j] = tmp;
        }

        function defaultCompare(a, b) {
          return a < b ? -1 : a > b ? 1 : 0;
        }

        var RBush = /*#__PURE__*/function () {
          function RBush() {
            var maxEntries = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 9;

            _classCallCheck$1(this, RBush);

            // max entries in a node is 9 by default; min node fill is 40% for best performance
            this._maxEntries = Math.max(4, maxEntries);
            this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
            this.clear();
          }

          _createClass$1(RBush, [{
            key: "all",
            value: function all() {
              return this._all(this.data, []);
            }
          }, {
            key: "search",
            value: function search(bbox) {
              var node = this.data;
              var result = [];
              if (!intersects(bbox, node)) return result;
              var toBBox = this.toBBox;
              var nodesToSearch = [];

              while (node) {
                for (var i = 0; i < node.children.length; i++) {
                  var child = node.children[i];
                  var childBBox = node.leaf ? toBBox(child) : child;

                  if (intersects(bbox, childBBox)) {
                    if (node.leaf) result.push(child);else if (contains(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
                  }
                }

                node = nodesToSearch.pop();
              }

              return result;
            }
          }, {
            key: "collides",
            value: function collides(bbox) {
              var node = this.data;
              if (!intersects(bbox, node)) return false;
              var nodesToSearch = [];

              while (node) {
                for (var i = 0; i < node.children.length; i++) {
                  var child = node.children[i];
                  var childBBox = node.leaf ? this.toBBox(child) : child;

                  if (intersects(bbox, childBBox)) {
                    if (node.leaf || contains(bbox, childBBox)) return true;
                    nodesToSearch.push(child);
                  }
                }

                node = nodesToSearch.pop();
              }

              return false;
            }
          }, {
            key: "load",
            value: function load(data) {
              if (!(data && data.length)) return this;

              if (data.length < this._minEntries) {
                for (var i = 0; i < data.length; i++) {
                  this.insert(data[i]);
                }

                return this;
              } // recursively build the tree with the given data from scratch using OMT algorithm


              var node = this._build(data.slice(), 0, data.length - 1, 0);

              if (!this.data.children.length) {
                // save as is if tree is empty
                this.data = node;
              } else if (this.data.height === node.height) {
                // split root if trees have the same height
                this._splitRoot(this.data, node);
              } else {
                if (this.data.height < node.height) {
                  // swap trees if inserted one is bigger
                  var tmpNode = this.data;
                  this.data = node;
                  node = tmpNode;
                } // insert the small tree into the large tree at appropriate level


                this._insert(node, this.data.height - node.height - 1, true);
              }

              return this;
            }
          }, {
            key: "insert",
            value: function insert(item) {
              if (item) this._insert(item, this.data.height - 1);
              return this;
            }
          }, {
            key: "clear",
            value: function clear() {
              this.data = createNode([]);
              return this;
            }
          }, {
            key: "remove",
            value: function remove(item, equalsFn) {
              if (!item) return this;
              var node = this.data;
              var bbox = this.toBBox(item);
              var path = [];
              var indexes = [];
              var i, parent, goingUp; // depth-first iterative tree traversal

              while (node || path.length) {
                if (!node) {
                  // go up
                  node = path.pop();
                  parent = path[path.length - 1];
                  i = indexes.pop();
                  goingUp = true;
                }

                if (node.leaf) {
                  // check current node
                  var index = findItem(item, node.children, equalsFn);

                  if (index !== -1) {
                    // item found, remove the item and condense tree upwards
                    node.children.splice(index, 1);
                    path.push(node);

                    this._condense(path);

                    return this;
                  }
                }

                if (!goingUp && !node.leaf && contains(node, bbox)) {
                  // go down
                  path.push(node);
                  indexes.push(i);
                  i = 0;
                  parent = node;
                  node = node.children[0];
                } else if (parent) {
                  // go right
                  i++;
                  node = parent.children[i];
                  goingUp = false;
                } else node = null; // nothing found

              }

              return this;
            }
          }, {
            key: "toBBox",
            value: function toBBox(item) {
              return item;
            }
          }, {
            key: "compareMinX",
            value: function compareMinX(a, b) {
              return a.minX - b.minX;
            }
          }, {
            key: "compareMinY",
            value: function compareMinY(a, b) {
              return a.minY - b.minY;
            }
          }, {
            key: "toJSON",
            value: function toJSON() {
              return this.data;
            }
          }, {
            key: "fromJSON",
            value: function fromJSON(data) {
              this.data = data;
              return this;
            }
          }, {
            key: "_all",
            value: function _all(node, result) {
              var nodesToSearch = [];

              while (node) {
                if (node.leaf) result.push.apply(result, _toConsumableArray(node.children));else nodesToSearch.push.apply(nodesToSearch, _toConsumableArray(node.children));
                node = nodesToSearch.pop();
              }

              return result;
            }
          }, {
            key: "_build",
            value: function _build(items, left, right, height) {
              var N = right - left + 1;
              var M = this._maxEntries;
              var node;

              if (N <= M) {
                // reached leaf level; return leaf
                node = createNode(items.slice(left, right + 1));
                calcBBox(node, this.toBBox);
                return node;
              }

              if (!height) {
                // target height of the bulk-loaded tree
                height = Math.ceil(Math.log(N) / Math.log(M)); // target number of root entries to maximize storage utilization

                M = Math.ceil(N / Math.pow(M, height - 1));
              }

              node = createNode([]);
              node.leaf = false;
              node.height = height; // split the items into M mostly square tiles

              var N2 = Math.ceil(N / M);
              var N1 = N2 * Math.ceil(Math.sqrt(M));
              multiSelect(items, left, right, N1, this.compareMinX);

              for (var i = left; i <= right; i += N1) {
                var right2 = Math.min(i + N1 - 1, right);
                multiSelect(items, i, right2, N2, this.compareMinY);

                for (var j = i; j <= right2; j += N2) {
                  var right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively

                  node.children.push(this._build(items, j, right3, height - 1));
                }
              }

              calcBBox(node, this.toBBox);
              return node;
            }
          }, {
            key: "_chooseSubtree",
            value: function _chooseSubtree(bbox, node, level, path) {
              while (true) {
                path.push(node);
                if (node.leaf || path.length - 1 === level) break;
                var minArea = Infinity;
                var minEnlargement = Infinity;
                var targetNode = void 0;

                for (var i = 0; i < node.children.length; i++) {
                  var child = node.children[i];
                  var area = bboxArea(child);
                  var enlargement = enlargedArea(bbox, child) - area; // choose entry with the least area enlargement

                  if (enlargement < minEnlargement) {
                    minEnlargement = enlargement;
                    minArea = area < minArea ? area : minArea;
                    targetNode = child;
                  } else if (enlargement === minEnlargement) {
                    // otherwise choose one with the smallest area
                    if (area < minArea) {
                      minArea = area;
                      targetNode = child;
                    }
                  }
                }

                node = targetNode || node.children[0];
              }

              return node;
            }
          }, {
            key: "_insert",
            value: function _insert(item, level, isNode) {
              var bbox = isNode ? item : this.toBBox(item);
              var insertPath = []; // find the best node for accommodating the item, saving all nodes along the path too

              var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node


              node.children.push(item);
              extend$1(node, bbox); // split on node overflow; propagate upwards if necessary

              while (level >= 0) {
                if (insertPath[level].children.length > this._maxEntries) {
                  this._split(insertPath, level);

                  level--;
                } else break;
              } // adjust bboxes along the insertion path


              this._adjustParentBBoxes(bbox, insertPath, level);
            } // split overflowed node into two

          }, {
            key: "_split",
            value: function _split(insertPath, level) {
              var node = insertPath[level];
              var M = node.children.length;
              var m = this._minEntries;

              this._chooseSplitAxis(node, m, M);

              var splitIndex = this._chooseSplitIndex(node, m, M);

              var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));
              newNode.height = node.height;
              newNode.leaf = node.leaf;
              calcBBox(node, this.toBBox);
              calcBBox(newNode, this.toBBox);
              if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
            }
          }, {
            key: "_splitRoot",
            value: function _splitRoot(node, newNode) {
              // split root node
              this.data = createNode([node, newNode]);
              this.data.height = node.height + 1;
              this.data.leaf = false;
              calcBBox(this.data, this.toBBox);
            }
          }, {
            key: "_chooseSplitIndex",
            value: function _chooseSplitIndex(node, m, M) {
              var index;
              var minOverlap = Infinity;
              var minArea = Infinity;

              for (var i = m; i <= M - m; i++) {
                var bbox1 = distBBox(node, 0, i, this.toBBox);
                var bbox2 = distBBox(node, i, M, this.toBBox);
                var overlap = intersectionArea(bbox1, bbox2);
                var area = bboxArea(bbox1) + bboxArea(bbox2); // choose distribution with minimum overlap

                if (overlap < minOverlap) {
                  minOverlap = overlap;
                  index = i;
                  minArea = area < minArea ? area : minArea;
                } else if (overlap === minOverlap) {
                  // otherwise choose distribution with minimum area
                  if (area < minArea) {
                    minArea = area;
                    index = i;
                  }
                }
              }

              return index || M - m;
            } // sorts node children by the best axis for split

          }, {
            key: "_chooseSplitAxis",
            value: function _chooseSplitAxis(node, m, M) {
              var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
              var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;

              var xMargin = this._allDistMargin(node, m, M, compareMinX);

              var yMargin = this._allDistMargin(node, m, M, compareMinY); // if total distributions margin value is minimal for x, sort by minX,
              // otherwise it's already sorted by minY


              if (xMargin < yMargin) node.children.sort(compareMinX);
            } // total margin of all possible split distributions where each node is at least m full

          }, {
            key: "_allDistMargin",
            value: function _allDistMargin(node, m, M, compare) {
              node.children.sort(compare);
              var toBBox = this.toBBox;
              var leftBBox = distBBox(node, 0, m, toBBox);
              var rightBBox = distBBox(node, M - m, M, toBBox);
              var margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);

              for (var i = m; i < M - m; i++) {
                var child = node.children[i];
                extend$1(leftBBox, node.leaf ? toBBox(child) : child);
                margin += bboxMargin(leftBBox);
              }

              for (var _i = M - m - 1; _i >= m; _i--) {
                var _child = node.children[_i];
                extend$1(rightBBox, node.leaf ? toBBox(_child) : _child);
                margin += bboxMargin(rightBBox);
              }

              return margin;
            }
          }, {
            key: "_adjustParentBBoxes",
            value: function _adjustParentBBoxes(bbox, path, level) {
              // adjust bboxes along the given tree path
              for (var i = level; i >= 0; i--) {
                extend$1(path[i], bbox);
              }
            }
          }, {
            key: "_condense",
            value: function _condense(path) {
              // go through the path, removing empty nodes and updating bboxes
              for (var i = path.length - 1, siblings; i >= 0; i--) {
                if (path[i].children.length === 0) {
                  if (i > 0) {
                    siblings = path[i - 1].children;
                    siblings.splice(siblings.indexOf(path[i]), 1);
                  } else this.clear();
                } else calcBBox(path[i], this.toBBox);
              }
            }
          }]);

          return RBush;
        }();

        function findItem(item, items, equalsFn) {
          if (!equalsFn) return items.indexOf(item);

          for (var i = 0; i < items.length; i++) {
            if (equalsFn(item, items[i])) return i;
          }

          return -1;
        } // calculate node's bbox from bboxes of its children


        function calcBBox(node, toBBox) {
          distBBox(node, 0, node.children.length, toBBox, node);
        } // min bounding rectangle of node children from k to p-1


        function distBBox(node, k, p, toBBox, destNode) {
          if (!destNode) destNode = createNode(null);
          destNode.minX = Infinity;
          destNode.minY = Infinity;
          destNode.maxX = -Infinity;
          destNode.maxY = -Infinity;

          for (var i = k; i < p; i++) {
            var child = node.children[i];
            extend$1(destNode, node.leaf ? toBBox(child) : child);
          }

          return destNode;
        }

        function extend$1(a, b) {
          a.minX = Math.min(a.minX, b.minX);
          a.minY = Math.min(a.minY, b.minY);
          a.maxX = Math.max(a.maxX, b.maxX);
          a.maxY = Math.max(a.maxY, b.maxY);
          return a;
        }

        function compareNodeMinX(a, b) {
          return a.minX - b.minX;
        }

        function compareNodeMinY(a, b) {
          return a.minY - b.minY;
        }

        function bboxArea(a) {
          return (a.maxX - a.minX) * (a.maxY - a.minY);
        }

        function bboxMargin(a) {
          return a.maxX - a.minX + (a.maxY - a.minY);
        }

        function enlargedArea(a, b) {
          return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) * (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
        }

        function intersectionArea(a, b) {
          var minX = Math.max(a.minX, b.minX);
          var minY = Math.max(a.minY, b.minY);
          var maxX = Math.min(a.maxX, b.maxX);
          var maxY = Math.min(a.maxY, b.maxY);
          return Math.max(0, maxX - minX) * Math.max(0, maxY - minY);
        }

        function contains(a, b) {
          return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
        }

        function intersects(a, b) {
          return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
        }

        function createNode(children) {
          return {
            children: children,
            height: 1,
            leaf: true,
            minX: Infinity,
            minY: Infinity,
            maxX: -Infinity,
            maxY: -Infinity
          };
        } // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
        // combines selection algorithm with binary divide & conquer approach


        function multiSelect(arr, left, right, n, compare) {
          var stack = [left, right];

          while (stack.length) {
            right = stack.pop();
            left = stack.pop();
            if (right - left <= n) continue;
            var mid = left + Math.ceil((right - left) / n / 2) * n;
            quickselect(arr, mid, left, right, compare);
            stack.push(left, mid, mid, right);
          }
        }

        function responseText(response) {
          if (!response.ok) throw new Error(response.status + " " + response.statusText);
          return response.text();
        }

        function d3_text (input, init) {
          return fetch(input, init).then(responseText);
        }

        function responseJson(response) {
          if (!response.ok) throw new Error(response.status + " " + response.statusText);
          if (response.status === 204 || response.status === 205) return;
          return response.json();
        }

        function d3_json (input, init) {
          return fetch(input, init).then(responseJson);
        }

        function parser(type) {
          return function (input, init) {
            return d3_text(input, init).then(function (text) {
              return new DOMParser().parseFromString(text, type);
            });
          };
        }

        var d3_xml = parser("application/xml");
        var svg = parser("image/svg+xml");

        var tiler$6 = utilTiler();
        var dispatch$7 = dispatch$8('loaded');
        var _tileZoom$3 = 14;
        var _krUrlRoot = 'https://www.keepright.at';
        var _krData = {
          errorTypes: {},
          localizeStrings: {}
        }; // This gets reassigned if reset

        var _cache$2;

        var _krRuleset = [// no 20 - multiple node on same spot - these are mostly boundaries overlapping roads
        30, 40, 50, 60, 70, 90, 100, 110, 120, 130, 150, 160, 170, 180, 190, 191, 192, 193, 194, 195, 196, 197, 198, 200, 201, 202, 203, 204, 205, 206, 207, 208, 210, 220, 230, 231, 232, 270, 280, 281, 282, 283, 284, 285, 290, 291, 292, 293, 294, 295, 296, 297, 298, 300, 310, 311, 312, 313, 320, 350, 360, 370, 380, 390, 400, 401, 402, 410, 411, 412, 413];

        function abortRequest$6(controller) {
          if (controller) {
            controller.abort();
          }
        }

        function abortUnwantedRequests$3(cache, tiles) {
          Object.keys(cache.inflightTile).forEach(function (k) {
            var wanted = tiles.find(function (tile) {
              return k === tile.id;
            });

            if (!wanted) {
              abortRequest$6(cache.inflightTile[k]);
              delete cache.inflightTile[k];
            }
          });
        }

        function encodeIssueRtree$2(d) {
          return {
            minX: d.loc[0],
            minY: d.loc[1],
            maxX: d.loc[0],
            maxY: d.loc[1],
            data: d
          };
        } // Replace or remove QAItem from rtree


        function updateRtree$3(item, replace) {
          _cache$2.rtree.remove(item, function (a, b) {
            return a.data.id === b.data.id;
          });

          if (replace) {
            _cache$2.rtree.insert(item);
          }
        }

        function tokenReplacements(d) {
          if (!(d instanceof QAItem)) return;
          var htmlRegex = new RegExp(/<\/[a-z][\s\S]*>/);
          var replacements = {};
          var issueTemplate = _krData.errorTypes[d.whichType];

          if (!issueTemplate) {
            /* eslint-disable no-console */
            console.log('No Template: ', d.whichType);
            console.log('  ', d.description);
            /* eslint-enable no-console */

            return;
          } // some descriptions are just fixed text


          if (!issueTemplate.regex) return; // regex pattern should match description with variable details captured

          var errorRegex = new RegExp(issueTemplate.regex, 'i');
          var errorMatch = errorRegex.exec(d.description);

          if (!errorMatch) {
            /* eslint-disable no-console */
            console.log('Unmatched: ', d.whichType);
            console.log('  ', d.description);
            console.log('  ', errorRegex);
            /* eslint-enable no-console */

            return;
          }

          for (var i = 1; i < errorMatch.length; i++) {
            // skip first
            var capture = errorMatch[i];
            var idType = void 0;
            idType = 'IDs' in issueTemplate ? issueTemplate.IDs[i - 1] : '';

            if (idType && capture) {
              // link IDs if present in the capture
              capture = parseError(capture, idType);
            } else if (htmlRegex.test(capture)) {
              // escape any html in non-IDs
              capture = '\\' + capture + '\\';
            } else {
              var compare = capture.toLowerCase();

              if (_krData.localizeStrings[compare]) {
                // some replacement strings can be localized
                capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
              }
            }

            replacements['var' + i] = capture;
          }

          return replacements;
        }

        function parseError(capture, idType) {
          var compare = capture.toLowerCase();

          if (_krData.localizeStrings[compare]) {
            // some replacement strings can be localized
            capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
          }

          switch (idType) {
            // link a string like "this node"
            case 'this':
              capture = linkErrorObject(capture);
              break;

            case 'url':
              capture = linkURL(capture);
              break;
            // link an entity ID

            case 'n':
            case 'w':
            case 'r':
              capture = linkEntity(idType + capture);
              break;
            // some errors have more complex ID lists/variance

            case '20':
              capture = parse20(capture);
              break;

            case '211':
              capture = parse211(capture);
              break;

            case '231':
              capture = parse231(capture);
              break;

            case '294':
              capture = parse294(capture);
              break;

            case '370':
              capture = parse370(capture);
              break;
          }

          return capture;

          function linkErrorObject(d) {
            return "<a class=\"error_object_link\">".concat(d, "</a>");
          }

          function linkEntity(d) {
            return "<a class=\"error_entity_link\">".concat(d, "</a>");
          }

          function linkURL(d) {
            return "<a class=\"kr_external_link\" target=\"_blank\" href=\"".concat(d, "\">").concat(d, "</a>");
          } // arbitrary node list of form: #ID, #ID, #ID...


          function parse211(capture) {
            var newList = [];
            var items = capture.split(', ');
            items.forEach(function (item) {
              // ID has # at the front
              var id = linkEntity('n' + item.slice(1));
              newList.push(id);
            });
            return newList.join(', ');
          } // arbitrary way list of form: #ID(layer),#ID(layer),#ID(layer)...


          function parse231(capture) {
            var newList = []; // unfortunately 'layer' can itself contain commas, so we split on '),'

            var items = capture.split('),');
            items.forEach(function (item) {
              var match = item.match(/\#(\d+)\((.+)\)?/);

              if (match !== null && match.length > 2) {
                newList.push(linkEntity('w' + match[1]) + ' ' + _t('QA.keepRight.errorTypes.231.layer', {
                  layer: match[2]
                }));
              }
            });
            return newList.join(', ');
          } // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...


          function parse294(capture) {
            var newList = [];
            var items = capture.split(',');
            items.forEach(function (item) {
              // item of form "from/to node/relation #ID"
              item = item.split(' '); // to/from role is more clear in quotes

              var role = "\"".concat(item[0], "\""); // first letter of node/relation provides the type

              var idType = item[1].slice(0, 1); // ID has # at the front

              var id = item[2].slice(1);
              id = linkEntity(idType + id);
              newList.push("".concat(role, " ").concat(item[1], " ").concat(id));
            });
            return newList.join(', ');
          } // may or may not include the string "(including the name 'name')"


          function parse370(capture) {
            if (!capture) return '';
            var match = capture.match(/\(including the name (\'.+\')\)/);

            if (match && match.length) {
              return _t('QA.keepRight.errorTypes.370.including_the_name', {
                name: match[1]
              });
            }

            return '';
          } // arbitrary node list of form: #ID,#ID,#ID...


          function parse20(capture) {
            var newList = [];
            var items = capture.split(',');
            items.forEach(function (item) {
              // ID has # at the front
              var id = linkEntity('n' + item.slice(1));
              newList.push(id);
            });
            return newList.join(', ');
          }
        }

        var serviceKeepRight = {
          title: 'keepRight',
          init: function init() {
            _mainFileFetcher.get('keepRight').then(function (d) {
              return _krData = d;
            });

            if (!_cache$2) {
              this.reset();
            }

            this.event = utilRebind(this, dispatch$7, 'on');
          },
          reset: function reset() {
            if (_cache$2) {
              Object.values(_cache$2.inflightTile).forEach(abortRequest$6);
            }

            _cache$2 = {
              data: {},
              loadedTile: {},
              inflightTile: {},
              inflightPost: {},
              closed: {},
              rtree: new RBush()
            };
          },
          // KeepRight API:  http://osm.mueschelsoft.de/keepright/interfacing.php
          loadIssues: function loadIssues(projection) {
            var _this = this;

            var options = {
              format: 'geojson',
              ch: _krRuleset
            }; // determine the needed tiles to cover the view

            var tiles = tiler$6.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection); // abort inflight requests that are no longer needed

            abortUnwantedRequests$3(_cache$2, tiles); // issue new requests..

            tiles.forEach(function (tile) {
              if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) return;

              var _tile$extent$rectangl = tile.extent.rectangle(),
                  _tile$extent$rectangl2 = _slicedToArray(_tile$extent$rectangl, 4),
                  left = _tile$extent$rectangl2[0],
                  top = _tile$extent$rectangl2[1],
                  right = _tile$extent$rectangl2[2],
                  bottom = _tile$extent$rectangl2[3];

              var params = Object.assign({}, options, {
                left: left,
                bottom: bottom,
                right: right,
                top: top
              });
              var url = "".concat(_krUrlRoot, "/export.php?") + utilQsString(params);
              var controller = new AbortController();
              _cache$2.inflightTile[tile.id] = controller;
              d3_json(url, {
                signal: controller.signal
              }).then(function (data) {
                delete _cache$2.inflightTile[tile.id];
                _cache$2.loadedTile[tile.id] = true;

                if (!data || !data.features || !data.features.length) {
                  throw new Error('No Data');
                }

                data.features.forEach(function (feature) {
                  var _feature$properties = feature.properties,
                      itemType = _feature$properties.error_type,
                      id = _feature$properties.error_id,
                      _feature$properties$c = _feature$properties.comment,
                      comment = _feature$properties$c === void 0 ? null : _feature$properties$c,
                      objectId = _feature$properties.object_id,
                      objectType = _feature$properties.object_type,
                      schema = _feature$properties.schema,
                      title = _feature$properties.title;
                  var loc = feature.geometry.coordinates,
                      _feature$properties$d = feature.properties.description,
                      description = _feature$properties$d === void 0 ? '' : _feature$properties$d; // if there is a parent, save its error type e.g.:
                  //  Error 191 = "highway-highway"
                  //  Error 190 = "intersections without junctions"  (parent)

                  var issueTemplate = _krData.errorTypes[itemType];
                  var parentIssueType = (Math.floor(itemType / 10) * 10).toString(); // try to handle error type directly, fallback to parent error type.

                  var whichType = issueTemplate ? itemType : parentIssueType;
                  var whichTemplate = _krData.errorTypes[whichType]; // Rewrite a few of the errors at this point..
                  // This is done to make them easier to linkify and translate.

                  switch (whichType) {
                    case '170':
                      description = "This feature has a FIXME tag: ".concat(description);
                      break;

                    case '292':
                    case '293':
                      description = description.replace('A turn-', 'This turn-');
                      break;

                    case '294':
                    case '295':
                    case '296':
                    case '297':
                    case '298':
                      description = "This turn-restriction~".concat(description);
                      break;

                    case '300':
                      description = 'This highway is missing a maxspeed tag';
                      break;

                    case '411':
                    case '412':
                    case '413':
                      description = "This feature~".concat(description);
                      break;
                  } // move markers slightly so it doesn't obscure the geometry,
                  // then move markers away from other coincident markers


                  var coincident = false;

                  do {
                    // first time, move marker up. after that, move marker right.
                    var delta = coincident ? [0.00001, 0] : [0, 0.00001];
                    loc = geoVecAdd(loc, delta);
                    var bbox = geoExtent(loc).bbox();
                    coincident = _cache$2.rtree.search(bbox).length;
                  } while (coincident);

                  var d = new QAItem(loc, _this, itemType, id, {
                    comment: comment,
                    description: description,
                    whichType: whichType,
                    parentIssueType: parentIssueType,
                    severity: whichTemplate.severity || 'error',
                    objectId: objectId,
                    objectType: objectType,
                    schema: schema,
                    title: title
                  });
                  d.replacements = tokenReplacements(d);
                  _cache$2.data[id] = d;

                  _cache$2.rtree.insert(encodeIssueRtree$2(d));
                });
                dispatch$7.call('loaded');
              })["catch"](function () {
                delete _cache$2.inflightTile[tile.id];
                _cache$2.loadedTile[tile.id] = true;
              });
            });
          },
          postUpdate: function postUpdate(d, callback) {
            var _this2 = this;

            if (_cache$2.inflightPost[d.id]) {
              return callback({
                message: 'Error update already inflight',
                status: -2
              }, d);
            }

            var params = {
              schema: d.schema,
              id: d.id
            };

            if (d.newStatus) {
              params.st = d.newStatus;
            }

            if (d.newComment !== undefined) {
              params.co = d.newComment;
            } // NOTE: This throws a CORS err, but it seems successful.
            // We don't care too much about the response, so this is fine.


            var url = "".concat(_krUrlRoot, "/comment.php?") + utilQsString(params);
            var controller = new AbortController();
            _cache$2.inflightPost[d.id] = controller; // Since this is expected to throw an error just continue as if it worked
            // (worst case scenario the request truly fails and issue will show up if iD restarts)

            d3_json(url, {
              signal: controller.signal
            })["finally"](function () {
              delete _cache$2.inflightPost[d.id];

              if (d.newStatus === 'ignore') {
                // ignore permanently (false positive)
                _this2.removeItem(d);
              } else if (d.newStatus === 'ignore_t') {
                // ignore temporarily (error fixed)
                _this2.removeItem(d);

                _cache$2.closed["".concat(d.schema, ":").concat(d.id)] = true;
              } else {
                d = _this2.replaceItem(d.update({
                  comment: d.newComment,
                  newComment: undefined,
                  newState: undefined
                }));
              }

              if (callback) callback(null, d);
            });
          },
          // Get all cached QAItems covering the viewport
          getItems: function getItems(projection) {
            var viewport = projection.clipExtent();
            var min = [viewport[0][0], viewport[1][1]];
            var max = [viewport[1][0], viewport[0][1]];
            var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
            return _cache$2.rtree.search(bbox).map(function (d) {
              return d.data;
            });
          },
          // Get a QAItem from cache
          // NOTE: Don't change method name until UI v3 is merged
          getError: function getError(id) {
            return _cache$2.data[id];
          },
          // Replace a single QAItem in the cache
          replaceItem: function replaceItem(item) {
            if (!(item instanceof QAItem) || !item.id) return;
            _cache$2.data[item.id] = item;
            updateRtree$3(encodeIssueRtree$2(item), true); // true = replace

            return item;
          },
          // Remove a single QAItem from the cache
          removeItem: function removeItem(item) {
            if (!(item instanceof QAItem) || !item.id) return;
            delete _cache$2.data[item.id];
            updateRtree$3(encodeIssueRtree$2(item), false); // false = remove
          },
          issueURL: function issueURL(item) {
            return "".concat(_krUrlRoot, "/report_map.php?schema=").concat(item.schema, "&error=").concat(item.id);
          },
          // Get an array of issues closed during this session.
          // Used to populate `closed:keepright` changeset tag
          getClosedIDs: function getClosedIDs() {
            return Object.keys(_cache$2.closed).sort();
          }
        };

        var tiler$5 = utilTiler();
        var dispatch$6 = dispatch$8('loaded');
        var _tileZoom$2 = 14;
        var _impOsmUrls = {
          ow: 'https://grab.community.improve-osm.org/directionOfFlowService',
          mr: 'https://grab.community.improve-osm.org/missingGeoService',
          tr: 'https://grab.community.improve-osm.org/turnRestrictionService'
        };
        var _impOsmData = {
          icons: {}
        }; // This gets reassigned if reset

        var _cache$1;

        function abortRequest$5(i) {
          Object.values(i).forEach(function (controller) {
            if (controller) {
              controller.abort();
            }
          });
        }

        function abortUnwantedRequests$2(cache, tiles) {
          Object.keys(cache.inflightTile).forEach(function (k) {
            var wanted = tiles.find(function (tile) {
              return k === tile.id;
            });

            if (!wanted) {
              abortRequest$5(cache.inflightTile[k]);
              delete cache.inflightTile[k];
            }
          });
        }

        function encodeIssueRtree$1(d) {
          return {
            minX: d.loc[0],
            minY: d.loc[1],
            maxX: d.loc[0],
            maxY: d.loc[1],
            data: d
          };
        } // Replace or remove QAItem from rtree


        function updateRtree$2(item, replace) {
          _cache$1.rtree.remove(item, function (a, b) {
            return a.data.id === b.data.id;
          });

          if (replace) {
            _cache$1.rtree.insert(item);
          }
        }

        function linkErrorObject(d) {
          return "<a class=\"error_object_link\">".concat(d, "</a>");
        }

        function linkEntity(d) {
          return "<a class=\"error_entity_link\">".concat(d, "</a>");
        }

        function pointAverage(points) {
          if (points.length) {
            var sum = points.reduce(function (acc, point) {
              return geoVecAdd(acc, [point.lon, point.lat]);
            }, [0, 0]);
            return geoVecScale(sum, 1 / points.length);
          } else {
            return [0, 0];
          }
        }

        function relativeBearing(p1, p2) {
          var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);

          if (angle < 0) {
            angle += 2 * Math.PI;
          } // Return degrees


          return angle * 180 / Math.PI;
        } // Assuming range [0,360)


        function cardinalDirection(bearing) {
          var dir = 45 * Math.round(bearing / 45);
          var compass = {
            0: 'north',
            45: 'northeast',
            90: 'east',
            135: 'southeast',
            180: 'south',
            225: 'southwest',
            270: 'west',
            315: 'northwest',
            360: 'north'
          };
          return _t("QA.improveOSM.directions.".concat(compass[dir]));
        } // Errors shouldn't obscure each other


        function preventCoincident$1(loc, bumpUp) {
          var coincident = false;

          do {
            // first time, move marker up. after that, move marker right.
            var delta = coincident ? [0.00001, 0] : bumpUp ? [0, 0.00001] : [0, 0];
            loc = geoVecAdd(loc, delta);
            var bbox = geoExtent(loc).bbox();
            coincident = _cache$1.rtree.search(bbox).length;
          } while (coincident);

          return loc;
        }

        var serviceImproveOSM = {
          title: 'improveOSM',
          init: function init() {
            _mainFileFetcher.get('qa_data').then(function (d) {
              return _impOsmData = d.improveOSM;
            });

            if (!_cache$1) {
              this.reset();
            }

            this.event = utilRebind(this, dispatch$6, 'on');
          },
          reset: function reset() {
            if (_cache$1) {
              Object.values(_cache$1.inflightTile).forEach(abortRequest$5);
            }

            _cache$1 = {
              data: {},
              loadedTile: {},
              inflightTile: {},
              inflightPost: {},
              closed: {},
              rtree: new RBush()
            };
          },
          loadIssues: function loadIssues(projection) {
            var _this = this;

            var options = {
              client: 'iD',
              status: 'OPEN',
              zoom: '19' // Use a high zoom so that clusters aren't returned

            }; // determine the needed tiles to cover the view

            var tiles = tiler$5.zoomExtent([_tileZoom$2, _tileZoom$2]).getTiles(projection); // abort inflight requests that are no longer needed

            abortUnwantedRequests$2(_cache$1, tiles); // issue new requests..

            tiles.forEach(function (tile) {
              if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) return;

              var _tile$extent$rectangl = tile.extent.rectangle(),
                  _tile$extent$rectangl2 = _slicedToArray(_tile$extent$rectangl, 4),
                  east = _tile$extent$rectangl2[0],
                  north = _tile$extent$rectangl2[1],
                  west = _tile$extent$rectangl2[2],
                  south = _tile$extent$rectangl2[3];

              var params = Object.assign({}, options, {
                east: east,
                south: south,
                west: west,
                north: north
              }); // 3 separate requests to store for each tile

              var requests = {};
              Object.keys(_impOsmUrls).forEach(function (k) {
                // We exclude WATER from missing geometry as it doesn't seem useful
                // We use most confident one-way and turn restrictions only, still have false positives
                var kParams = Object.assign({}, params, k === 'mr' ? {
                  type: 'PARKING,ROAD,BOTH,PATH'
                } : {
                  confidenceLevel: 'C1'
                });
                var url = "".concat(_impOsmUrls[k], "/search?") + utilQsString(kParams);
                var controller = new AbortController();
                requests[k] = controller;
                d3_json(url, {
                  signal: controller.signal
                }).then(function (data) {
                  delete _cache$1.inflightTile[tile.id][k];

                  if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
                    delete _cache$1.inflightTile[tile.id];
                    _cache$1.loadedTile[tile.id] = true;
                  } // Road segments at high zoom == oneways


                  if (data.roadSegments) {
                    data.roadSegments.forEach(function (feature) {
                      // Position error at the approximate middle of the segment
                      var points = feature.points,
                          wayId = feature.wayId,
                          fromNodeId = feature.fromNodeId,
                          toNodeId = feature.toNodeId;
                      var itemId = "".concat(wayId).concat(fromNodeId).concat(toNodeId);
                      var mid = points.length / 2;
                      var loc; // Even number of points, find midpoint of the middle two
                      // Odd number of points, use position of very middle point

                      if (mid % 1 === 0) {
                        loc = pointAverage([points[mid - 1], points[mid]]);
                      } else {
                        mid = points[Math.floor(mid)];
                        loc = [mid.lon, mid.lat];
                      } // One-ways can land on same segment in opposite direction


                      loc = preventCoincident$1(loc, false);
                      var d = new QAItem(loc, _this, k, itemId, {
                        issueKey: k,
                        // used as a category
                        identifier: {
                          // used to post changes
                          wayId: wayId,
                          fromNodeId: fromNodeId,
                          toNodeId: toNodeId
                        },
                        objectId: wayId,
                        objectType: 'way'
                      }); // Variables used in the description

                      d.replacements = {
                        percentage: feature.percentOfTrips,
                        num_trips: feature.numberOfTrips,
                        highway: linkErrorObject(_t('QA.keepRight.error_parts.highway')),
                        from_node: linkEntity('n' + feature.fromNodeId),
                        to_node: linkEntity('n' + feature.toNodeId)
                      };
                      _cache$1.data[d.id] = d;

                      _cache$1.rtree.insert(encodeIssueRtree$1(d));
                    });
                  } // Tiles at high zoom == missing roads


                  if (data.tiles) {
                    data.tiles.forEach(function (feature) {
                      var type = feature.type,
                          x = feature.x,
                          y = feature.y,
                          numberOfTrips = feature.numberOfTrips;
                      var geoType = type.toLowerCase();
                      var itemId = "".concat(geoType).concat(x).concat(y).concat(numberOfTrips); // Average of recorded points should land on the missing geometry
                      // Missing geometry could happen to land on another error

                      var loc = pointAverage(feature.points);
                      loc = preventCoincident$1(loc, false);
                      var d = new QAItem(loc, _this, "".concat(k, "-").concat(geoType), itemId, {
                        issueKey: k,
                        identifier: {
                          x: x,
                          y: y
                        }
                      });
                      d.replacements = {
                        num_trips: numberOfTrips,
                        geometry_type: _t("QA.improveOSM.geometry_types.".concat(geoType))
                      }; // -1 trips indicates data came from a 3rd party

                      if (numberOfTrips === -1) {
                        d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
                      }

                      _cache$1.data[d.id] = d;

                      _cache$1.rtree.insert(encodeIssueRtree$1(d));
                    });
                  } // Entities at high zoom == turn restrictions


                  if (data.entities) {
                    data.entities.forEach(function (feature) {
                      var point = feature.point,
                          id = feature.id,
                          segments = feature.segments,
                          numberOfPasses = feature.numberOfPasses,
                          turnType = feature.turnType;
                      var itemId = "".concat(id.replace(/[,:+#]/g, '_')); // Turn restrictions could be missing at same junction
                      // We also want to bump the error up so node is accessible

                      var loc = preventCoincident$1([point.lon, point.lat], true); // Elements are presented in a strange way

                      var ids = id.split(',');
                      var from_way = ids[0];
                      var via_node = ids[3];
                      var to_way = ids[2].split(':')[1];
                      var d = new QAItem(loc, _this, k, itemId, {
                        issueKey: k,
                        identifier: id,
                        objectId: via_node,
                        objectType: 'node'
                      }); // Travel direction along from_way clarifies the turn restriction

                      var _segments$0$points = _slicedToArray(segments[0].points, 2),
                          p1 = _segments$0$points[0],
                          p2 = _segments$0$points[1];

                      var dir_of_travel = cardinalDirection(relativeBearing(p1, p2)); // Variables used in the description

                      d.replacements = {
                        num_passed: numberOfPasses,
                        num_trips: segments[0].numberOfTrips,
                        turn_restriction: turnType.toLowerCase(),
                        from_way: linkEntity('w' + from_way),
                        to_way: linkEntity('w' + to_way),
                        travel_direction: dir_of_travel,
                        junction: linkErrorObject(_t('QA.keepRight.error_parts.this_node'))
                      };
                      _cache$1.data[d.id] = d;

                      _cache$1.rtree.insert(encodeIssueRtree$1(d));

                      dispatch$6.call('loaded');
                    });
                  }
                })["catch"](function () {
                  delete _cache$1.inflightTile[tile.id][k];

                  if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
                    delete _cache$1.inflightTile[tile.id];
                    _cache$1.loadedTile[tile.id] = true;
                  }
                });
              });
              _cache$1.inflightTile[tile.id] = requests;
            });
          },
          getComments: function getComments(item) {
            var _this2 = this;

            // If comments already retrieved no need to do so again
            if (item.comments) {
              return Promise.resolve(item);
            }

            var key = item.issueKey;
            var qParams = {};

            if (key === 'ow') {
              qParams = item.identifier;
            } else if (key === 'mr') {
              qParams.tileX = item.identifier.x;
              qParams.tileY = item.identifier.y;
            } else if (key === 'tr') {
              qParams.targetId = item.identifier;
            }

            var url = "".concat(_impOsmUrls[key], "/retrieveComments?") + utilQsString(qParams);

            var cacheComments = function cacheComments(data) {
              // Assign directly for immediate use afterwards
              // comments are served newest to oldest
              item.comments = data.comments ? data.comments.reverse() : [];

              _this2.replaceItem(item);
            };

            return d3_json(url).then(cacheComments).then(function () {
              return item;
            });
          },
          postUpdate: function postUpdate(d, callback) {
            if (!serviceOsm.authenticated()) {
              // Username required in payload
              return callback({
                message: 'Not Authenticated',
                status: -3
              }, d);
            }

            if (_cache$1.inflightPost[d.id]) {
              return callback({
                message: 'Error update already inflight',
                status: -2
              }, d);
            } // Payload can only be sent once username is established


            serviceOsm.userDetails(sendPayload.bind(this));

            function sendPayload(err, user) {
              var _this3 = this;

              if (err) {
                return callback(err, d);
              }

              var key = d.issueKey;
              var url = "".concat(_impOsmUrls[key], "/comment");
              var payload = {
                username: user.display_name,
                targetIds: [d.identifier]
              };

              if (d.newStatus) {
                payload.status = d.newStatus;
                payload.text = 'status changed';
              } // Comment take place of default text


              if (d.newComment) {
                payload.text = d.newComment;
              }

              var controller = new AbortController();
              _cache$1.inflightPost[d.id] = controller;
              var options = {
                method: 'POST',
                signal: controller.signal,
                body: JSON.stringify(payload)
              };
              d3_json(url, options).then(function () {
                delete _cache$1.inflightPost[d.id]; // Just a comment, update error in cache

                if (!d.newStatus) {
                  var now = new Date();
                  var comments = d.comments ? d.comments : [];
                  comments.push({
                    username: payload.username,
                    text: payload.text,
                    timestamp: now.getTime() / 1000
                  });

                  _this3.replaceItem(d.update({
                    comments: comments,
                    newComment: undefined
                  }));
                } else {
                  _this3.removeItem(d);

                  if (d.newStatus === 'SOLVED') {
                    // Keep track of the number of issues closed per type to tag the changeset
                    if (!(d.issueKey in _cache$1.closed)) {
                      _cache$1.closed[d.issueKey] = 0;
                    }

                    _cache$1.closed[d.issueKey] += 1;
                  }
                }

                if (callback) callback(null, d);
              })["catch"](function (err) {
                delete _cache$1.inflightPost[d.id];
                if (callback) callback(err.message);
              });
            }
          },
          // Get all cached QAItems covering the viewport
          getItems: function getItems(projection) {
            var viewport = projection.clipExtent();
            var min = [viewport[0][0], viewport[1][1]];
            var max = [viewport[1][0], viewport[0][1]];
            var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
            return _cache$1.rtree.search(bbox).map(function (d) {
              return d.data;
            });
          },
          // Get a QAItem from cache
          // NOTE: Don't change method name until UI v3 is merged
          getError: function getError(id) {
            return _cache$1.data[id];
          },
          // get the name of the icon to display for this item
          getIcon: function getIcon(itemType) {
            return _impOsmData.icons[itemType];
          },
          // Replace a single QAItem in the cache
          replaceItem: function replaceItem(issue) {
            if (!(issue instanceof QAItem) || !issue.id) return;
            _cache$1.data[issue.id] = issue;
            updateRtree$2(encodeIssueRtree$1(issue), true); // true = replace

            return issue;
          },
          // Remove a single QAItem from the cache
          removeItem: function removeItem(issue) {
            if (!(issue instanceof QAItem) || !issue.id) return;
            delete _cache$1.data[issue.id];
            updateRtree$2(encodeIssueRtree$1(issue), false); // false = remove
          },
          // Used to populate `closed:improveosm:*` changeset tags
          getClosedCounts: function getClosedCounts() {
            return _cache$1.closed;
          }
        };

        var defaults$5 = createCommonjsModule(function (module) {
          function getDefaults() {
            return {
              baseUrl: null,
              breaks: false,
              gfm: true,
              headerIds: true,
              headerPrefix: '',
              highlight: null,
              langPrefix: 'language-',
              mangle: true,
              pedantic: false,
              renderer: null,
              sanitize: false,
              sanitizer: null,
              silent: false,
              smartLists: false,
              smartypants: false,
              tokenizer: null,
              walkTokens: null,
              xhtml: false
            };
          }

          function changeDefaults(newDefaults) {
            module.exports.defaults = newDefaults;
          }

          module.exports = {
            defaults: getDefaults(),
            getDefaults: getDefaults,
            changeDefaults: changeDefaults
          };
        });

        /**
         * Helpers
         */
        var escapeTest = /[&<>"']/;
        var escapeReplace = /[&<>"']/g;
        var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
        var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
        var escapeReplacements = {
          '&': '&amp;',
          '<': '&lt;',
          '>': '&gt;',
          '"': '&quot;',
          "'": '&#39;'
        };

        var getEscapeReplacement = function getEscapeReplacement(ch) {
          return escapeReplacements[ch];
        };

        function escape$3(html, encode) {
          if (encode) {
            if (escapeTest.test(html)) {
              return html.replace(escapeReplace, getEscapeReplacement);
            }
          } else {
            if (escapeTestNoEncode.test(html)) {
              return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
            }
          }

          return html;
        }

        var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;

        function unescape$2(html) {
          // explicitly match decimal, hex, and named HTML entities
          return html.replace(unescapeTest, function (_, n) {
            n = n.toLowerCase();
            if (n === 'colon') return ':';

            if (n.charAt(0) === '#') {
              return n.charAt(1) === 'x' ? String.fromCharCode(parseInt(n.substring(2), 16)) : String.fromCharCode(+n.substring(1));
            }

            return '';
          });
        }

        var caret = /(^|[^\[])\^/g;

        function edit$1(regex, opt) {
          regex = regex.source || regex;
          opt = opt || '';
          var obj = {
            replace: function replace(name, val) {
              val = val.source || val;
              val = val.replace(caret, '$1');
              regex = regex.replace(name, val);
              return obj;
            },
            getRegex: function getRegex() {
              return new RegExp(regex, opt);
            }
          };
          return obj;
        }

        var nonWordAndColonTest = /[^\w:]/g;
        var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;

        function cleanUrl$1(sanitize, base, href) {
          if (sanitize) {
            var prot;

            try {
              prot = decodeURIComponent(unescape$2(href)).replace(nonWordAndColonTest, '').toLowerCase();
            } catch (e) {
              return null;
            }

            if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
              return null;
            }
          }

          if (base && !originIndependentUrl.test(href)) {
            href = resolveUrl$1(base, href);
          }

          try {
            href = encodeURI(href).replace(/%25/g, '%');
          } catch (e) {
            return null;
          }

          return href;
        }

        var baseUrls = {};
        var justDomain = /^[^:]+:\/*[^/]*$/;
        var protocol = /^([^:]+:)[\s\S]*$/;
        var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;

        function resolveUrl$1(base, href) {
          if (!baseUrls[' ' + base]) {
            // we can ignore everything in base after the last slash of its path component,
            // but we might need to add _that_
            // https://tools.ietf.org/html/rfc3986#section-3
            if (justDomain.test(base)) {
              baseUrls[' ' + base] = base + '/';
            } else {
              baseUrls[' ' + base] = rtrim$1(base, '/', true);
            }
          }

          base = baseUrls[' ' + base];
          var relativeBase = base.indexOf(':') === -1;

          if (href.substring(0, 2) === '//') {
            if (relativeBase) {
              return href;
            }

            return base.replace(protocol, '$1') + href;
          } else if (href.charAt(0) === '/') {
            if (relativeBase) {
              return href;
            }

            return base.replace(domain, '$1') + href;
          } else {
            return base + href;
          }
        }

        var noopTest$1 = {
          exec: function noopTest() {}
        };

        function merge$2(obj) {
          var i = 1,
              target,
              key;

          for (; i < arguments.length; i++) {
            target = arguments[i];

            for (key in target) {
              if (Object.prototype.hasOwnProperty.call(target, key)) {
                obj[key] = target[key];
              }
            }
          }

          return obj;
        }

        function splitCells$1(tableRow, count) {
          // ensure that every cell-delimiting pipe has a space
          // before it to distinguish it from an escaped pipe
          var row = tableRow.replace(/\|/g, function (match, offset, str) {
            var escaped = false,
                curr = offset;

            while (--curr >= 0 && str[curr] === '\\') {
              escaped = !escaped;
            }

            if (escaped) {
              // odd number of slashes means | is escaped
              // so we leave it alone
              return '|';
            } else {
              // add space before unescaped |
              return ' |';
            }
          }),
              cells = row.split(/ \|/);
          var i = 0;

          if (cells.length > count) {
            cells.splice(count);
          } else {
            while (cells.length < count) {
              cells.push('');
            }
          }

          for (; i < cells.length; i++) {
            // leading or trailing whitespace is ignored per the gfm spec
            cells[i] = cells[i].trim().replace(/\\\|/g, '|');
          }

          return cells;
        } // Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
        // /c*$/ is vulnerable to REDOS.
        // invert: Remove suffix of non-c chars instead. Default falsey.


        function rtrim$1(str, c, invert) {
          var l = str.length;

          if (l === 0) {
            return '';
          } // Length of suffix matching the invert condition.


          var suffLen = 0; // Step left until we fail to match the invert condition.

          while (suffLen < l) {
            var currChar = str.charAt(l - suffLen - 1);

            if (currChar === c && !invert) {
              suffLen++;
            } else if (currChar !== c && invert) {
              suffLen++;
            } else {
              break;
            }
          }

          return str.substr(0, l - suffLen);
        }

        function findClosingBracket$1(str, b) {
          if (str.indexOf(b[1]) === -1) {
            return -1;
          }

          var l = str.length;
          var level = 0,
              i = 0;

          for (; i < l; i++) {
            if (str[i] === '\\') {
              i++;
            } else if (str[i] === b[0]) {
              level++;
            } else if (str[i] === b[1]) {
              level--;

              if (level < 0) {
                return i;
              }
            }
          }

          return -1;
        }

        function checkSanitizeDeprecation$1(opt) {
          if (opt && opt.sanitize && !opt.silent) {
            console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');
          }
        } // copied from https://stackoverflow.com/a/5450113/806777


        function repeatString$1(pattern, count) {
          if (count < 1) {
            return '';
          }

          var result = '';

          while (count > 1) {
            if (count & 1) {
              result += pattern;
            }

            count >>= 1;
            pattern += pattern;
          }

          return result + pattern;
        }

        var helpers = {
          escape: escape$3,
          unescape: unescape$2,
          edit: edit$1,
          cleanUrl: cleanUrl$1,
          resolveUrl: resolveUrl$1,
          noopTest: noopTest$1,
          merge: merge$2,
          splitCells: splitCells$1,
          rtrim: rtrim$1,
          findClosingBracket: findClosingBracket$1,
          checkSanitizeDeprecation: checkSanitizeDeprecation$1,
          repeatString: repeatString$1
        };

        var defaults$4 = defaults$5.defaults;
        var rtrim = helpers.rtrim,
            splitCells = helpers.splitCells,
            _escape = helpers.escape,
            findClosingBracket = helpers.findClosingBracket;

        function outputLink(cap, link, raw) {
          var href = link.href;
          var title = link.title ? _escape(link.title) : null;
          var text = cap[1].replace(/\\([\[\]])/g, '$1');

          if (cap[0].charAt(0) !== '!') {
            return {
              type: 'link',
              raw: raw,
              href: href,
              title: title,
              text: text
            };
          } else {
            return {
              type: 'image',
              raw: raw,
              href: href,
              title: title,
              text: _escape(text)
            };
          }
        }

        function indentCodeCompensation(raw, text) {
          var matchIndentToCode = raw.match(/^(\s+)(?:```)/);

          if (matchIndentToCode === null) {
            return text;
          }

          var indentToCode = matchIndentToCode[1];
          return text.split('\n').map(function (node) {
            var matchIndentInNode = node.match(/^\s+/);

            if (matchIndentInNode === null) {
              return node;
            }

            var _matchIndentInNode = _slicedToArray(matchIndentInNode, 1),
                indentInNode = _matchIndentInNode[0];

            if (indentInNode.length >= indentToCode.length) {
              return node.slice(indentToCode.length);
            }

            return node;
          }).join('\n');
        }
        /**
         * Tokenizer
         */


        var Tokenizer_1 = /*#__PURE__*/function () {
          function Tokenizer(options) {
            _classCallCheck$1(this, Tokenizer);

            this.options = options || defaults$4;
          }

          _createClass$1(Tokenizer, [{
            key: "space",
            value: function space(src) {
              var cap = this.rules.block.newline.exec(src);

              if (cap) {
                if (cap[0].length > 1) {
                  return {
                    type: 'space',
                    raw: cap[0]
                  };
                }

                return {
                  raw: '\n'
                };
              }
            }
          }, {
            key: "code",
            value: function code(src) {
              var cap = this.rules.block.code.exec(src);

              if (cap) {
                var text = cap[0].replace(/^ {1,4}/gm, '');
                return {
                  type: 'code',
                  raw: cap[0],
                  codeBlockStyle: 'indented',
                  text: !this.options.pedantic ? rtrim(text, '\n') : text
                };
              }
            }
          }, {
            key: "fences",
            value: function fences(src) {
              var cap = this.rules.block.fences.exec(src);

              if (cap) {
                var raw = cap[0];
                var text = indentCodeCompensation(raw, cap[3] || '');
                return {
                  type: 'code',
                  raw: raw,
                  lang: cap[2] ? cap[2].trim() : cap[2],
                  text: text
                };
              }
            }
          }, {
            key: "heading",
            value: function heading(src) {
              var cap = this.rules.block.heading.exec(src);

              if (cap) {
                var text = cap[2].trim(); // remove trailing #s

                if (/#$/.test(text)) {
                  var trimmed = rtrim(text, '#');

                  if (this.options.pedantic) {
                    text = trimmed.trim();
                  } else if (!trimmed || / $/.test(trimmed)) {
                    // CommonMark requires space before trailing #s
                    text = trimmed.trim();
                  }
                }

                return {
                  type: 'heading',
                  raw: cap[0],
                  depth: cap[1].length,
                  text: text
                };
              }
            }
          }, {
            key: "nptable",
            value: function nptable(src) {
              var cap = this.rules.block.nptable.exec(src);

              if (cap) {
                var item = {
                  type: 'table',
                  header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
                  align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
                  cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : [],
                  raw: cap[0]
                };

                if (item.header.length === item.align.length) {
                  var l = item.align.length;
                  var i;

                  for (i = 0; i < l; i++) {
                    if (/^ *-+: *$/.test(item.align[i])) {
                      item.align[i] = 'right';
                    } else if (/^ *:-+: *$/.test(item.align[i])) {
                      item.align[i] = 'center';
                    } else if (/^ *:-+ *$/.test(item.align[i])) {
                      item.align[i] = 'left';
                    } else {
                      item.align[i] = null;
                    }
                  }

                  l = item.cells.length;

                  for (i = 0; i < l; i++) {
                    item.cells[i] = splitCells(item.cells[i], item.header.length);
                  }

                  return item;
                }
              }
            }
          }, {
            key: "hr",
            value: function hr(src) {
              var cap = this.rules.block.hr.exec(src);

              if (cap) {
                return {
                  type: 'hr',
                  raw: cap[0]
                };
              }
            }
          }, {
            key: "blockquote",
            value: function blockquote(src) {
              var cap = this.rules.block.blockquote.exec(src);

              if (cap) {
                var text = cap[0].replace(/^ *> ?/gm, '');
                return {
                  type: 'blockquote',
                  raw: cap[0],
                  text: text
                };
              }
            }
          }, {
            key: "list",
            value: function list(src) {
              var cap = this.rules.block.list.exec(src);

              if (cap) {
                var raw = cap[0];
                var bull = cap[2];
                var isordered = bull.length > 1;
                var list = {
                  type: 'list',
                  raw: raw,
                  ordered: isordered,
                  start: isordered ? +bull.slice(0, -1) : '',
                  loose: false,
                  items: []
                }; // Get each top-level item.

                var itemMatch = cap[0].match(this.rules.block.item);
                var next = false,
                    item,
                    space,
                    bcurr,
                    bnext,
                    addBack,
                    loose,
                    istask,
                    ischecked,
                    endMatch;
                var l = itemMatch.length;
                bcurr = this.rules.block.listItemStart.exec(itemMatch[0]);

                for (var i = 0; i < l; i++) {
                  item = itemMatch[i];
                  raw = item;

                  if (!this.options.pedantic) {
                    // Determine if current item contains the end of the list
                    endMatch = item.match(new RegExp('\\n\\s*\\n {0,' + (bcurr[0].length - 1) + '}\\S'));

                    if (endMatch) {
                      addBack = item.length - endMatch.index + itemMatch.slice(i + 1).join('\n').length;
                      list.raw = list.raw.substring(0, list.raw.length - addBack);
                      item = item.substring(0, endMatch.index);
                      raw = item;
                      l = i + 1;
                    }
                  } // Determine whether the next list item belongs here.
                  // Backpedal if it does not belong in this list.


                  if (i !== l - 1) {
                    bnext = this.rules.block.listItemStart.exec(itemMatch[i + 1]);

                    if (!this.options.pedantic ? bnext[1].length >= bcurr[0].length || bnext[1].length > 3 : bnext[1].length > bcurr[1].length) {
                      // nested list or continuation
                      itemMatch.splice(i, 2, itemMatch[i] + (!this.options.pedantic && bnext[1].length < bcurr[0].length && !itemMatch[i].match(/\n$/) ? '' : '\n') + itemMatch[i + 1]);
                      i--;
                      l--;
                      continue;
                    } else if ( // different bullet style
                    !this.options.pedantic || this.options.smartLists ? bnext[2][bnext[2].length - 1] !== bull[bull.length - 1] : isordered === (bnext[2].length === 1)) {
                      addBack = itemMatch.slice(i + 1).join('\n').length;
                      list.raw = list.raw.substring(0, list.raw.length - addBack);
                      i = l - 1;
                    }

                    bcurr = bnext;
                  } // Remove the list item's bullet
                  // so it is seen as the next token.


                  space = item.length;
                  item = item.replace(/^ *([*+-]|\d+[.)]) ?/, ''); // Outdent whatever the
                  // list item contains. Hacky.

                  if (~item.indexOf('\n ')) {
                    space -= item.length;
                    item = !this.options.pedantic ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '') : item.replace(/^ {1,4}/gm, '');
                  } // trim item newlines at end


                  item = rtrim(item, '\n');

                  if (i !== l - 1) {
                    raw = raw + '\n';
                  } // Determine whether item is loose or not.
                  // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
                  // for discount behavior.


                  loose = next || /\n\n(?!\s*$)/.test(raw);

                  if (i !== l - 1) {
                    next = raw.slice(-2) === '\n\n';
                    if (!loose) loose = next;
                  }

                  if (loose) {
                    list.loose = true;
                  } // Check for task list items


                  if (this.options.gfm) {
                    istask = /^\[[ xX]\] /.test(item);
                    ischecked = undefined;

                    if (istask) {
                      ischecked = item[1] !== ' ';
                      item = item.replace(/^\[[ xX]\] +/, '');
                    }
                  }

                  list.items.push({
                    type: 'list_item',
                    raw: raw,
                    task: istask,
                    checked: ischecked,
                    loose: loose,
                    text: item
                  });
                }

                return list;
              }
            }
          }, {
            key: "html",
            value: function html(src) {
              var cap = this.rules.block.html.exec(src);

              if (cap) {
                return {
                  type: this.options.sanitize ? 'paragraph' : 'html',
                  raw: cap[0],
                  pre: !this.options.sanitizer && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
                  text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
                };
              }
            }
          }, {
            key: "def",
            value: function def(src) {
              var cap = this.rules.block.def.exec(src);

              if (cap) {
                if (cap[3]) cap[3] = cap[3].substring(1, cap[3].length - 1);
                var tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
                return {
                  type: 'def',
                  tag: tag,
                  raw: cap[0],
                  href: cap[2],
                  title: cap[3]
                };
              }
            }
          }, {
            key: "table",
            value: function table(src) {
              var cap = this.rules.block.table.exec(src);

              if (cap) {
                var item = {
                  type: 'table',
                  header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
                  align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
                  cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
                };

                if (item.header.length === item.align.length) {
                  item.raw = cap[0];
                  var l = item.align.length;
                  var i;

                  for (i = 0; i < l; i++) {
                    if (/^ *-+: *$/.test(item.align[i])) {
                      item.align[i] = 'right';
                    } else if (/^ *:-+: *$/.test(item.align[i])) {
                      item.align[i] = 'center';
                    } else if (/^ *:-+ *$/.test(item.align[i])) {
                      item.align[i] = 'left';
                    } else {
                      item.align[i] = null;
                    }
                  }

                  l = item.cells.length;

                  for (i = 0; i < l; i++) {
                    item.cells[i] = splitCells(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
                  }

                  return item;
                }
              }
            }
          }, {
            key: "lheading",
            value: function lheading(src) {
              var cap = this.rules.block.lheading.exec(src);

              if (cap) {
                return {
                  type: 'heading',
                  raw: cap[0],
                  depth: cap[2].charAt(0) === '=' ? 1 : 2,
                  text: cap[1]
                };
              }
            }
          }, {
            key: "paragraph",
            value: function paragraph(src) {
              var cap = this.rules.block.paragraph.exec(src);

              if (cap) {
                return {
                  type: 'paragraph',
                  raw: cap[0],
                  text: cap[1].charAt(cap[1].length - 1) === '\n' ? cap[1].slice(0, -1) : cap[1]
                };
              }
            }
          }, {
            key: "text",
            value: function text(src) {
              var cap = this.rules.block.text.exec(src);

              if (cap) {
                return {
                  type: 'text',
                  raw: cap[0],
                  text: cap[0]
                };
              }
            }
          }, {
            key: "escape",
            value: function escape(src) {
              var cap = this.rules.inline.escape.exec(src);

              if (cap) {
                return {
                  type: 'escape',
                  raw: cap[0],
                  text: _escape(cap[1])
                };
              }
            }
          }, {
            key: "tag",
            value: function tag(src, inLink, inRawBlock) {
              var cap = this.rules.inline.tag.exec(src);

              if (cap) {
                if (!inLink && /^<a /i.test(cap[0])) {
                  inLink = true;
                } else if (inLink && /^<\/a>/i.test(cap[0])) {
                  inLink = false;
                }

                if (!inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
                  inRawBlock = true;
                } else if (inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
                  inRawBlock = false;
                }

                return {
                  type: this.options.sanitize ? 'text' : 'html',
                  raw: cap[0],
                  inLink: inLink,
                  inRawBlock: inRawBlock,
                  text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
                };
              }
            }
          }, {
            key: "link",
            value: function link(src) {
              var cap = this.rules.inline.link.exec(src);

              if (cap) {
                var trimmedUrl = cap[2].trim();

                if (!this.options.pedantic && /^</.test(trimmedUrl)) {
                  // commonmark requires matching angle brackets
                  if (!/>$/.test(trimmedUrl)) {
                    return;
                  } // ending angle bracket cannot be escaped


                  var rtrimSlash = rtrim(trimmedUrl.slice(0, -1), '\\');

                  if ((trimmedUrl.length - rtrimSlash.length) % 2 === 0) {
                    return;
                  }
                } else {
                  // find closing parenthesis
                  var lastParenIndex = findClosingBracket(cap[2], '()');

                  if (lastParenIndex > -1) {
                    var start = cap[0].indexOf('!') === 0 ? 5 : 4;
                    var linkLen = start + cap[1].length + lastParenIndex;
                    cap[2] = cap[2].substring(0, lastParenIndex);
                    cap[0] = cap[0].substring(0, linkLen).trim();
                    cap[3] = '';
                  }
                }

                var href = cap[2];
                var title = '';

                if (this.options.pedantic) {
                  // split pedantic href and title
                  var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);

                  if (link) {
                    href = link[1];
                    title = link[3];
                  }
                } else {
                  title = cap[3] ? cap[3].slice(1, -1) : '';
                }

                href = href.trim();

                if (/^</.test(href)) {
                  if (this.options.pedantic && !/>$/.test(trimmedUrl)) {
                    // pedantic allows starting angle bracket without ending angle bracket
                    href = href.slice(1);
                  } else {
                    href = href.slice(1, -1);
                  }
                }

                return outputLink(cap, {
                  href: href ? href.replace(this.rules.inline._escapes, '$1') : href,
                  title: title ? title.replace(this.rules.inline._escapes, '$1') : title
                }, cap[0]);
              }
            }
          }, {
            key: "reflink",
            value: function reflink(src, links) {
              var cap;

              if ((cap = this.rules.inline.reflink.exec(src)) || (cap = this.rules.inline.nolink.exec(src))) {
                var link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
                link = links[link.toLowerCase()];

                if (!link || !link.href) {
                  var text = cap[0].charAt(0);
                  return {
                    type: 'text',
                    raw: text,
                    text: text
                  };
                }

                return outputLink(cap, link, cap[0]);
              }
            }
          }, {
            key: "emStrong",
            value: function emStrong(src, maskedSrc) {
              var prevChar = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : '';
              var match = this.rules.inline.emStrong.lDelim.exec(src);
              if (!match) return; // _ can't be between two alphanumerics. \p{L}\p{N} includes non-english alphabet/numbers as well

              if (match[3] && prevChar.match(/(?:[0-9A-Za-z\xAA\xB2\xB3\xB5\xB9\xBA\xBC-\xBE\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u052F\u0531-\u0556\u0559\u0560-\u0588\u05D0-\u05EA\u05EF-\u05F2\u0620-\u064A\u0660-\u0669\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07C0-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u0860-\u086A\u08A0-\u08B4\u08B6-\u08C7\u0904-\u0939\u093D\u0950\u0958-\u0961\u0966-\u096F\u0971-\u0980\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09E6-\u09F1\u09F4-\u09F9\u09FC\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A66-\u0A6F\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0AE6-\u0AEF\u0AF9\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B66-\u0B6F\u0B71-\u0B77\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0BE6-\u0BF2\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58-\u0C5A\u0C60\u0C61\u0C66-\u0C6F\u0C78-\u0C7E\u0C80\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CE6-\u0CEF\u0CF1\u0CF2\u0D04-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D54-\u0D56\u0D58-\u0D61\u0D66-\u0D78\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DE6-\u0DEF\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E86-\u0E8A\u0E8C-\u0EA3\u0EA5\u0EA7-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F20-\u0F33\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F-\u1049\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u1090-\u1099\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1369-\u137C\u1380-\u138F\u13A0-\u13F5\u13F8-\u13FD\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u17E0-\u17E9\u17F0-\u17F9\u1810-\u1819\u1820-\u1878\u1880-\u1884\u1887-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19DA\u1A00-\u1A16\u1A20-\u1A54\u1A80-\u1A89\u1A90-\u1A99\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B50-\u1B59\u1B83-\u1BA0\u1BAE-\u1BE5\u1C00-\u1C23\u1C40-\u1C49\u1C4D-\u1C7D\u1C80-\u1C88\u1C90-\u1CBA\u1CBD-\u1CBF\u1CE9-\u1CEC\u1CEE-\u1CF3\u1CF5\u1CF6\u1CFA\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2070\u2071\u2074-\u2079\u207F-\u2089\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2150-\u2189\u2460-\u249B\u24EA-\u24FF\u2776-\u2793\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2CFD\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312F\u3131-\u318E\u3192-\u3195\u31A0-\u31BF\u31F0-\u31FF\u3220-\u3229\u3248-\u324F\u3251-\u325F\u3280-\u3289\u32B1-\u32BF\u3400-\u4DBF\u4E00-\u9FFC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA7BF\uA7C2-\uA7CA\uA7F5-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA830-\uA835\uA840-\uA873\uA882-\uA8B3\uA8D0-\uA8D9\uA8F2-\uA8F7\uA8FB\uA8FD\uA8FE\uA900-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF-\uA9D9\uA9E0-\uA9E4\uA9E6-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA50-\uAA59\uAA60-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB69\uAB70-\uABE2\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD07-\uDD33\uDD40-\uDD78\uDD8A\uDD8B\uDE80-\uDE9C\uDEA0-\uDED0\uDEE1-\uDEFB\uDF00-\uDF23\uDF2D-\uDF4A\uDF50-\uDF75\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCA0-\uDCA9\uDCB0-\uDCD3\uDCD8-\uDCFB\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC58-\uDC76\uDC79-\uDC9E\uDCA7-\uDCAF\uDCE0-\uDCF2\uDCF4\uDCF5\uDCFB-\uDD1B\uDD20-\uDD39\uDD80-\uDDB7\uDDBC-\uDDCF\uDDD2-\uDE00\uDE10-\uDE13\uDE15-\uDE17\uDE19-\uDE35\uDE40-\uDE48\uDE60-\uDE7E\uDE80-\uDE9F\uDEC0-\uDEC7\uDEC9-\uDEE4\uDEEB-\uDEEF\uDF00-\uDF35\uDF40-\uDF55\uDF58-\uDF72\uDF78-\uDF91\uDFA9-\uDFAF]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2\uDCFA-\uDD23\uDD30-\uDD39\uDE60-\uDE7E\uDE80-\uDEA9\uDEB0\uDEB1\uDF00-\uDF27\uDF30-\uDF45\uDF51-\uDF54\uDFB0-\uDFCB\uDFE0-\uDFF6]|\uD804[\uDC03-\uDC37\uDC52-\uDC6F\uDC83-\uDCAF\uDCD0-\uDCE8\uDCF0-\uDCF9\uDD03-\uDD26\uDD36-\uDD3F\uDD44\uDD47\uDD50-\uDD72\uDD76\uDD83-\uDDB2\uDDC1-\uDDC4\uDDD0-\uDDDA\uDDDC\uDDE1-\uDDF4\uDE00-\uDE11\uDE13-\uDE2B\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEDE\uDEF0-\uDEF9\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3D\uDF50\uDF5D-\uDF61]|\uD805[\uDC00-\uDC34\uDC47-\uDC4A\uDC50-\uDC59\uDC5F-\uDC61\uDC80-\uDCAF\uDCC4\uDCC5\uDCC7\uDCD0-\uDCD9\uDD80-\uDDAE\uDDD8-\uDDDB\uDE00-\uDE2F\uDE44\uDE50-\uDE59\uDE80-\uDEAA\uDEB8\uDEC0-\uDEC9\uDF00-\uDF1A\uDF30-\uDF3B]|\uD806[\uDC00-\uDC2B\uDCA0-\uDCF2\uDCFF-\uDD06\uDD09\uDD0C-\uDD13\uDD15\uDD16\uDD18-\uDD2F\uDD3F\uDD41\uDD50-\uDD59\uDDA0-\uDDA7\uDDAA-\uDDD0\uDDE1\uDDE3\uDE00\uDE0B-\uDE32\uDE3A\uDE50\uDE5C-\uDE89\uDE9D\uDEC0-\uDEF8]|\uD807[\uDC00-\uDC08\uDC0A-\uDC2E\uDC40\uDC50-\uDC6C\uDC72-\uDC8F\uDD00-\uDD06\uDD08\uDD09\uDD0B-\uDD30\uDD46\uDD50-\uDD59\uDD60-\uDD65\uDD67\uDD68\uDD6A-\uDD89\uDD98\uDDA0-\uDDA9\uDEE0-\uDEF2\uDFB0\uDFC0-\uDFD4]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|[\uD80C\uD81C-\uD820\uD822\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872\uD874-\uD879\uD880-\uD883][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE60-\uDE69\uDED0-\uDEED\uDF00-\uDF2F\uDF40-\uDF43\uDF50-\uDF59\uDF5B-\uDF61\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDE40-\uDE96\uDF00-\uDF4A\uDF50\uDF93-\uDF9F\uDFE0\uDFE1\uDFE3]|\uD821[\uDC00-\uDFF7]|\uD823[\uDC00-\uDCD5\uDD00-\uDD08]|\uD82C[\uDC00-\uDD1E\uDD50-\uDD52\uDD64-\uDD67\uDD70-\uDEFB]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99]|\uD834[\uDEE0-\uDEF3\uDF60-\uDF78]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB\uDFCE-\uDFFF]|\uD838[\uDD00-\uDD2C\uDD37-\uDD3D\uDD40-\uDD49\uDD4E\uDEC0-\uDEEB\uDEF0-\uDEF9]|\uD83A[\uDC00-\uDCC4\uDCC7-\uDCCF\uDD00-\uDD43\uDD4B\uDD50-\uDD59]|\uD83B[\uDC71-\uDCAB\uDCAD-\uDCAF\uDCB1-\uDCB4\uDD01-\uDD2D\uDD2F-\uDD3D\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD83C[\uDD00-\uDD0C]|\uD83E[\uDFF0-\uDFF9]|\uD869[\uDC00-\uDEDD\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1\uDEB0-\uDFFF]|\uD87A[\uDC00-\uDFE0]|\uD87E[\uDC00-\uDE1D]|\uD884[\uDC00-\uDF4A])/)) return;
              var nextChar = match[1] || match[2] || '';

              if (!nextChar || nextChar && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar))) {
                var lLength = match[0].length - 1;
                var rDelim,
                    rLength,
                    delimTotal = lLength,
                    midDelimTotal = 0;
                var endReg = match[0][0] === '*' ? this.rules.inline.emStrong.rDelimAst : this.rules.inline.emStrong.rDelimUnd;
                endReg.lastIndex = 0; // Clip maskedSrc to same section of string as src (move to lexer?)

                maskedSrc = maskedSrc.slice(-1 * src.length + lLength);

                while ((match = endReg.exec(maskedSrc)) != null) {
                  rDelim = match[1] || match[2] || match[3] || match[4] || match[5] || match[6];
                  if (!rDelim) continue; // skip single * in __abc*abc__

                  rLength = rDelim.length;

                  if (match[3] || match[4]) {
                    // found another Left Delim
                    delimTotal += rLength;
                    continue;
                  } else if (match[5] || match[6]) {
                    // either Left or Right Delim
                    if (lLength % 3 && !((lLength + rLength) % 3)) {
                      midDelimTotal += rLength;
                      continue; // CommonMark Emphasis Rules 9-10
                    }
                  }

                  delimTotal -= rLength;
                  if (delimTotal > 0) continue; // Haven't found enough closing delimiters
                  // Remove extra characters. *a*** -> *a*

                  rLength = Math.min(rLength, rLength + delimTotal + midDelimTotal); // Create `em` if smallest delimiter has odd char count. *a***

                  if (Math.min(lLength, rLength) % 2) {
                    return {
                      type: 'em',
                      raw: src.slice(0, lLength + match.index + rLength + 1),
                      text: src.slice(1, lLength + match.index + rLength)
                    };
                  } // Create 'strong' if smallest delimiter has even char count. **a***


                  return {
                    type: 'strong',
                    raw: src.slice(0, lLength + match.index + rLength + 1),
                    text: src.slice(2, lLength + match.index + rLength - 1)
                  };
                }
              }
            }
          }, {
            key: "codespan",
            value: function codespan(src) {
              var cap = this.rules.inline.code.exec(src);

              if (cap) {
                var text = cap[2].replace(/\n/g, ' ');
                var hasNonSpaceChars = /[^ ]/.test(text);
                var hasSpaceCharsOnBothEnds = /^ /.test(text) && / $/.test(text);

                if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
                  text = text.substring(1, text.length - 1);
                }

                text = _escape(text, true);
                return {
                  type: 'codespan',
                  raw: cap[0],
                  text: text
                };
              }
            }
          }, {
            key: "br",
            value: function br(src) {
              var cap = this.rules.inline.br.exec(src);

              if (cap) {
                return {
                  type: 'br',
                  raw: cap[0]
                };
              }
            }
          }, {
            key: "del",
            value: function del(src) {
              var cap = this.rules.inline.del.exec(src);

              if (cap) {
                return {
                  type: 'del',
                  raw: cap[0],
                  text: cap[2]
                };
              }
            }
          }, {
            key: "autolink",
            value: function autolink(src, mangle) {
              var cap = this.rules.inline.autolink.exec(src);

              if (cap) {
                var text, href;

                if (cap[2] === '@') {
                  text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
                  href = 'mailto:' + text;
                } else {
                  text = _escape(cap[1]);
                  href = text;
                }

                return {
                  type: 'link',
                  raw: cap[0],
                  text: text,
                  href: href,
                  tokens: [{
                    type: 'text',
                    raw: text,
                    text: text
                  }]
                };
              }
            }
          }, {
            key: "url",
            value: function url(src, mangle) {
              var cap;

              if (cap = this.rules.inline.url.exec(src)) {
                var text, href;

                if (cap[2] === '@') {
                  text = _escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
                  href = 'mailto:' + text;
                } else {
                  // do extended autolink path validation
                  var prevCapZero;

                  do {
                    prevCapZero = cap[0];
                    cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
                  } while (prevCapZero !== cap[0]);

                  text = _escape(cap[0]);

                  if (cap[1] === 'www.') {
                    href = 'http://' + text;
                  } else {
                    href = text;
                  }
                }

                return {
                  type: 'link',
                  raw: cap[0],
                  text: text,
                  href: href,
                  tokens: [{
                    type: 'text',
                    raw: text,
                    text: text
                  }]
                };
              }
            }
          }, {
            key: "inlineText",
            value: function inlineText(src, inRawBlock, smartypants) {
              var cap = this.rules.inline.text.exec(src);

              if (cap) {
                var text;

                if (inRawBlock) {
                  text = this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0];
                } else {
                  text = _escape(this.options.smartypants ? smartypants(cap[0]) : cap[0]);
                }

                return {
                  type: 'text',
                  raw: cap[0],
                  text: text
                };
              }
            }
          }]);

          return Tokenizer;
        }();

        var noopTest = helpers.noopTest,
            edit = helpers.edit,
            merge$1 = helpers.merge;
        /**
         * Block-Level Grammar
         */

        var block$1 = {
          newline: /^(?: *(?:\n|$))+/,
          code: /^( {4}[^\n]+(?:\n(?: *(?:\n|$))*)?)+/,
          fences: /^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?:\n+|$)|$)/,
          hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
          heading: /^ {0,3}(#{1,6})(?=\s|$)(.*)(?:\n+|$)/,
          blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
          list: /^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?! {0,3}bull )\n*|\s*$)/,
          html: '^ {0,3}(?:' // optional indentation
          + '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
          + '|comment[^\\n]*(\\n+|$)' // (2)
          + '|<\\?[\\s\\S]*?(?:\\?>\\n*|$)' // (3)
          + '|<![A-Z][\\s\\S]*?(?:>\\n*|$)' // (4)
          + '|<!\\[CDATA\\[[\\s\\S]*?(?:\\]\\]>\\n*|$)' // (5)
          + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (6)
          + '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (7) open tag
          + '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (7) closing tag
          + ')',
          def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
          nptable: noopTest,
          table: noopTest,
          lheading: /^([^\n]+)\n {0,3}(=+|-+) *(?:\n+|$)/,
          // regex template, placeholders will be replaced according to different paragraph
          // interruption rules of commonmark and the original markdown spec:
          _paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html| +\n)[^\n]+)*)/,
          text: /^[^\n]+/
        };
        block$1._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
        block$1._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
        block$1.def = edit(block$1.def).replace('label', block$1._label).replace('title', block$1._title).getRegex();
        block$1.bullet = /(?:[*+-]|\d{1,9}[.)])/;
        block$1.item = /^( *)(bull) ?[^\n]*(?:\n(?! *bull ?)[^\n]*)*/;
        block$1.item = edit(block$1.item, 'gm').replace(/bull/g, block$1.bullet).getRegex();
        block$1.listItemStart = edit(/^( *)(bull) */).replace('bull', block$1.bullet).getRegex();
        block$1.list = edit(block$1.list).replace(/bull/g, block$1.bullet).replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))').replace('def', '\\n+(?=' + block$1.def.source + ')').getRegex();
        block$1._tag = 'address|article|aside|base|basefont|blockquote|body|caption' + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption' + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe' + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option' + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr' + '|track|ul';
        block$1._comment = /<!--(?!-?>)[\s\S]*?(?:-->|$)/;
        block$1.html = edit(block$1.html, 'i').replace('comment', block$1._comment).replace('tag', block$1._tag).replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/).getRegex();
        block$1.paragraph = edit(block$1._paragraph).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
        .replace('blockquote', ' {0,3}>').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
        .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // pars can be interrupted by type (6) html blocks
        .getRegex();
        block$1.blockquote = edit(block$1.blockquote).replace('paragraph', block$1.paragraph).getRegex();
        /**
         * Normal Block Grammar
         */

        block$1.normal = merge$1({}, block$1);
        /**
         * GFM Block Grammar
         */

        block$1.gfm = merge$1({}, block$1.normal, {
          nptable: '^ *([^|\\n ].*\\|.*)\\n' // Header
          + ' {0,3}([-:]+ *\\|[-| :]*)' // Align
          + '(?:\\n((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)',
          // Cells
          table: '^ *\\|(.+)\\n' // Header
          + ' {0,3}\\|?( *[-:]+[-| :]*)' // Align
          + '(?:\\n *((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells

        });
        block$1.gfm.nptable = edit(block$1.gfm.nptable).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
        .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // tables can be interrupted by type (6) html blocks
        .getRegex();
        block$1.gfm.table = edit(block$1.gfm.table).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
        .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // tables can be interrupted by type (6) html blocks
        .getRegex();
        /**
         * Pedantic grammar (original John Gruber's loose markdown specification)
         */

        block$1.pedantic = merge$1({}, block$1.normal, {
          html: edit('^ *(?:comment *(?:\\n|\\s*$)' + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
          + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))').replace('comment', block$1._comment).replace(/tag/g, '(?!(?:' + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub' + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)' + '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b').getRegex(),
          def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/,
          heading: /^(#{1,6})(.*)(?:\n+|$)/,
          fences: noopTest,
          // fences not supported
          paragraph: edit(block$1.normal._paragraph).replace('hr', block$1.hr).replace('heading', ' *#{1,6} *[^\n]').replace('lheading', block$1.lheading).replace('blockquote', ' {0,3}>').replace('|fences', '').replace('|list', '').replace('|html', '').getRegex()
        });
        /**
         * Inline-Level Grammar
         */

        var inline$1 = {
          escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
          autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
          url: noopTest,
          tag: '^comment' + '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
          + '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
          + '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
          + '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
          + '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>',
          // CDATA section
          link: /^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
          reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
          nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
          reflinkSearch: 'reflink|nolink(?!\\()',
          emStrong: {
            lDelim: /^(?:\*+(?:([punct_])|[^\s*]))|^_+(?:([punct*])|([^\s_]))/,
            //        (1) and (2) can only be a Right Delimiter. (3) and (4) can only be Left.  (5) and (6) can be either Left or Right.
            //        () Skip other delimiter (1) #***                   (2) a***#, a***                   (3) #***a, ***a                 (4) ***#              (5) #***#                 (6) a***a
            rDelimAst: /\_\_[^_*]*?\*[^_*]*?\_\_|[punct_](\*+)(?=[\s]|$)|[^punct*_\s](\*+)(?=[punct_\s]|$)|[punct_\s](\*+)(?=[^punct*_\s])|[\s](\*+)(?=[punct_])|[punct_](\*+)(?=[punct_])|[^punct*_\s](\*+)(?=[^punct*_\s])/,
            rDelimUnd: /\*\*[^_*]*?\_[^_*]*?\*\*|[punct*](\_+)(?=[\s]|$)|[^punct*_\s](\_+)(?=[punct*\s]|$)|[punct*\s](\_+)(?=[^punct*_\s])|[\s](\_+)(?=[punct*])|[punct*](\_+)(?=[punct*])/ // ^- Not allowed for _

          },
          code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
          br: /^( {2,}|\\)\n(?!\s*$)/,
          del: noopTest,
          text: /^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*_]|\b_|$)|[^ ](?= {2,}\n)))/,
          punctuation: /^([\spunctuation])/
        }; // list of punctuation marks from CommonMark spec
        // without * and _ to handle the different emphasis markers * and _

        inline$1._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
        inline$1.punctuation = edit(inline$1.punctuation).replace(/punctuation/g, inline$1._punctuation).getRegex(); // sequences em should skip over [title](link), `code`, <html>

        inline$1.blockSkip = /\[[^\]]*?\]\([^\)]*?\)|`[^`]*?`|<[^>]*?>/g;
        inline$1.escapedEmSt = /\\\*|\\_/g;
        inline$1._comment = edit(block$1._comment).replace('(?:-->|$)', '-->').getRegex();
        inline$1.emStrong.lDelim = edit(inline$1.emStrong.lDelim).replace(/punct/g, inline$1._punctuation).getRegex();
        inline$1.emStrong.rDelimAst = edit(inline$1.emStrong.rDelimAst, 'g').replace(/punct/g, inline$1._punctuation).getRegex();
        inline$1.emStrong.rDelimUnd = edit(inline$1.emStrong.rDelimUnd, 'g').replace(/punct/g, inline$1._punctuation).getRegex();
        inline$1._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
        inline$1._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
        inline$1._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
        inline$1.autolink = edit(inline$1.autolink).replace('scheme', inline$1._scheme).replace('email', inline$1._email).getRegex();
        inline$1._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
        inline$1.tag = edit(inline$1.tag).replace('comment', inline$1._comment).replace('attribute', inline$1._attribute).getRegex();
        inline$1._label = /(?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
        inline$1._href = /<(?:\\.|[^\n<>\\])+>|[^\s\x00-\x1f]*/;
        inline$1._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
        inline$1.link = edit(inline$1.link).replace('label', inline$1._label).replace('href', inline$1._href).replace('title', inline$1._title).getRegex();
        inline$1.reflink = edit(inline$1.reflink).replace('label', inline$1._label).getRegex();
        inline$1.reflinkSearch = edit(inline$1.reflinkSearch, 'g').replace('reflink', inline$1.reflink).replace('nolink', inline$1.nolink).getRegex();
        /**
         * Normal Inline Grammar
         */

        inline$1.normal = merge$1({}, inline$1);
        /**
         * Pedantic Inline Grammar
         */

        inline$1.pedantic = merge$1({}, inline$1.normal, {
          strong: {
            start: /^__|\*\*/,
            middle: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
            endAst: /\*\*(?!\*)/g,
            endUnd: /__(?!_)/g
          },
          em: {
            start: /^_|\*/,
            middle: /^()\*(?=\S)([\s\S]*?\S)\*(?!\*)|^_(?=\S)([\s\S]*?\S)_(?!_)/,
            endAst: /\*(?!\*)/g,
            endUnd: /_(?!_)/g
          },
          link: edit(/^!?\[(label)\]\((.*?)\)/).replace('label', inline$1._label).getRegex(),
          reflink: edit(/^!?\[(label)\]\s*\[([^\]]*)\]/).replace('label', inline$1._label).getRegex()
        });
        /**
         * GFM Inline Grammar
         */

        inline$1.gfm = merge$1({}, inline$1.normal, {
          escape: edit(inline$1.escape).replace('])', '~|])').getRegex(),
          _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
          url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
          _backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
          del: /^(~~?)(?=[^\s~])([\s\S]*?[^\s~])\1(?=[^~]|$)/,
          text: /^([`~]+|[^`~])(?:(?= {2,}\n)|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)|[\s\S]*?(?:(?=[\\<!\[`*~_]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)))/
        });
        inline$1.gfm.url = edit(inline$1.gfm.url, 'i').replace('email', inline$1.gfm._extended_email).getRegex();
        /**
         * GFM + Line Breaks Inline Grammar
         */

        inline$1.breaks = merge$1({}, inline$1.gfm, {
          br: edit(inline$1.br).replace('{2,}', '*').getRegex(),
          text: edit(inline$1.gfm.text).replace('\\b_', '\\b_| {2,}\\n').replace(/\{2,\}/g, '*').getRegex()
        });
        var rules = {
          block: block$1,
          inline: inline$1
        };

        var defaults$3 = defaults$5.defaults;
        var block = rules.block,
            inline = rules.inline;
        var repeatString = helpers.repeatString;
        /**
         * smartypants text replacement
         */

        function smartypants(text) {
          return text // em-dashes
          .replace(/---/g, "\u2014") // en-dashes
          .replace(/--/g, "\u2013") // opening singles
          .replace(/(^|[-\u2014/(\[{"\s])'/g, "$1\u2018") // closing singles & apostrophes
          .replace(/'/g, "\u2019") // opening doubles
          .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, "$1\u201C") // closing doubles
          .replace(/"/g, "\u201D") // ellipses
          .replace(/\.{3}/g, "\u2026");
        }
        /**
         * mangle email addresses
         */


        function mangle(text) {
          var out = '',
              i,
              ch;
          var l = text.length;

          for (i = 0; i < l; i++) {
            ch = text.charCodeAt(i);

            if (Math.random() > 0.5) {
              ch = 'x' + ch.toString(16);
            }

            out += '&#' + ch + ';';
          }

          return out;
        }
        /**
         * Block Lexer
         */


        var Lexer_1 = /*#__PURE__*/function () {
          function Lexer(options) {
            _classCallCheck$1(this, Lexer);

            this.tokens = [];
            this.tokens.links = Object.create(null);
            this.options = options || defaults$3;
            this.options.tokenizer = this.options.tokenizer || new Tokenizer_1();
            this.tokenizer = this.options.tokenizer;
            this.tokenizer.options = this.options;
            var rules = {
              block: block.normal,
              inline: inline.normal
            };

            if (this.options.pedantic) {
              rules.block = block.pedantic;
              rules.inline = inline.pedantic;
            } else if (this.options.gfm) {
              rules.block = block.gfm;

              if (this.options.breaks) {
                rules.inline = inline.breaks;
              } else {
                rules.inline = inline.gfm;
              }
            }

            this.tokenizer.rules = rules;
          }
          /**
           * Expose Rules
           */


          _createClass$1(Lexer, [{
            key: "lex",
            value:
            /**
             * Preprocessing
             */
            function lex(src) {
              src = src.replace(/\r\n|\r/g, '\n').replace(/\t/g, '    ');
              this.blockTokens(src, this.tokens, true);
              this.inline(this.tokens);
              return this.tokens;
            }
            /**
             * Lexing
             */

          }, {
            key: "blockTokens",
            value: function blockTokens(src) {
              var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
              var top = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;

              if (this.options.pedantic) {
                src = src.replace(/^ +$/gm, '');
              }

              var token, i, l, lastToken;

              while (src) {
                // newline
                if (token = this.tokenizer.space(src)) {
                  src = src.substring(token.raw.length);

                  if (token.type) {
                    tokens.push(token);
                  }

                  continue;
                } // code


                if (token = this.tokenizer.code(src)) {
                  src = src.substring(token.raw.length);
                  lastToken = tokens[tokens.length - 1]; // An indented code block cannot interrupt a paragraph.

                  if (lastToken && lastToken.type === 'paragraph') {
                    lastToken.raw += '\n' + token.raw;
                    lastToken.text += '\n' + token.text;
                  } else {
                    tokens.push(token);
                  }

                  continue;
                } // fences


                if (token = this.tokenizer.fences(src)) {
                  src = src.substring(token.raw.length);
                  tokens.push(token);
                  continue;
                } // heading


                if (token = this.tokenizer.heading(src)) {
                  src = src.substring(token.raw.length);
                  tokens.push(token);
                  continue;
                } // table no leading pipe (gfm)


                if (token = this.tokenizer.nptable(src)) {
                  src = src.substring(token.raw.length);
                  tokens.push(token);
                  continue;
                } // hr


                if (token = this.tokenizer.hr(src)) {
                  src = src.substring(token.raw.length);
                  tokens.push(token);
                  continue;
                } // blockquote


                if (token = this.tokenizer.blockquote(src)) {
                  src = src.substring(token.raw.length);
                  token.tokens = this.blockTokens(token.text, [], top);
                  tokens.push(token);
                  continue;
                } // list


                if (token = this.tokenizer.list(src)) {
                  src = src.substring(token.raw.length);
                  l = token.items.length;

                  for (i = 0; i < l; i++) {
                    token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
                  }

                  tokens.push(token);
                  continue;
                } // html


                if (token = this.tokenizer.html(src)) {
                  src = src.substring(token.raw.length);
                  tokens.push(token);
                  continue;
                } // def


                if (top && (token = this.tokenizer.def(src))) {
                  src = src.substring(token.raw.length);

                  if (!this.tokens.links[token.tag]) {
                    this.tokens.links[token.tag] = {
                      href: token.href,
                      title: token.title
                    };
                  }

                  continue;
                } // table (gfm)


                if (token = this.tokenizer.table(src)) {
                  src = src.substring(token.raw.length);
                  tokens.push(token);
                  continue;
                } // lheading


                if (token = this.tokenizer.lheading(src)) {
                  src = src.substring(token.raw.length);
                  tokens.push(token);
                  continue;
                } // top-level paragraph


                if (top && (token = this.tokenizer.paragraph(src))) {
                  src = src.substring(token.raw.length);
                  tokens.push(token);
                  continue;
                } // text


                if (token = this.tokenizer.text(src)) {
                  src = src.substring(token.raw.length);
                  lastToken = tokens[tokens.length - 1];

                  if (lastToken && lastToken.type === 'text') {
                    lastToken.raw += '\n' + token.raw;
                    lastToken.text += '\n' + token.text;
                  } else {
                    tokens.push(token);
                  }

                  continue;
                }

                if (src) {
                  var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);

                  if (this.options.silent) {
                    console.error(errMsg);
                    break;
                  } else {
                    throw new Error(errMsg);
                  }
                }
              }

              return tokens;
            }
          }, {
            key: "inline",
            value: function inline(tokens) {
              var i, j, k, l2, row, token;
              var l = tokens.length;

              for (i = 0; i < l; i++) {
                token = tokens[i];

                switch (token.type) {
                  case 'paragraph':
                  case 'text':
                  case 'heading':
                    {
                      token.tokens = [];
                      this.inlineTokens(token.text, token.tokens);
                      break;
                    }

                  case 'table':
                    {
                      token.tokens = {
                        header: [],
                        cells: []
                      }; // header

                      l2 = token.header.length;

                      for (j = 0; j < l2; j++) {
                        token.tokens.header[j] = [];
                        this.inlineTokens(token.header[j], token.tokens.header[j]);
                      } // cells


                      l2 = token.cells.length;

                      for (j = 0; j < l2; j++) {
                        row = token.cells[j];
                        token.tokens.cells[j] = [];

                        for (k = 0; k < row.length; k++) {
                          token.tokens.cells[j][k] = [];
                          this.inlineTokens(row[k], token.tokens.cells[j][k]);
                        }
                      }

                      break;
                    }

                  case 'blockquote':
                    {
                      this.inline(token.tokens);
                      break;
                    }

                  case 'list':
                    {
                      l2 = token.items.length;

                      for (j = 0; j < l2; j++) {
                        this.inline(token.items[j].tokens);
                      }

                      break;
                    }
                }
              }

              return tokens;
            }
            /**
             * Lexing/Compiling
             */

          }, {
            key: "inlineTokens",
            value: function inlineTokens(src) {
              var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
              var inLink = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
              var inRawBlock = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;
              var token, lastToken; // String with links masked to avoid interference with em and strong

              var maskedSrc = src;
              var match;
              var keepPrevChar, prevChar; // Mask out reflinks

              if (this.tokens.links) {
                var links = Object.keys(this.tokens.links);

                if (links.length > 0) {
                  while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
                    if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
                      maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
                    }
                  }
                }
              } // Mask out other blocks


              while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
                maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
              } // Mask out escaped em & strong delimiters


              while ((match = this.tokenizer.rules.inline.escapedEmSt.exec(maskedSrc)) != null) {
                maskedSrc = maskedSrc.slice(0, match.index) + '++' + maskedSrc.slice(this.tokenizer.rules.inline.escapedEmSt.lastIndex);
              }

              while (src) {
                if (!keepPrevChar) {
                  prevChar = '';
                }

                keepPrevChar = false; // escape

                if (token = this.tokenizer.escape(src)) {
                  src = src.substring(token.raw.length);
                  tokens.push(token);
                  continue;
                } // tag


                if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {
                  src = src.substring(token.raw.length);
                  inLink = token.inLink;
                  inRawBlock = token.inRawBlock;
                  var _lastToken = tokens[tokens.length - 1];

                  if (_lastToken && token.type === 'text' && _lastToken.type === 'text') {
                    _lastToken.raw += token.raw;
                    _lastToken.text += token.text;
                  } else {
                    tokens.push(token);
                  }

                  continue;
                } // link


                if (token = this.tokenizer.link(src)) {
                  src = src.substring(token.raw.length);

                  if (token.type === 'link') {
                    token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
                  }

                  tokens.push(token);
                  continue;
                } // reflink, nolink


                if (token = this.tokenizer.reflink(src, this.tokens.links)) {
                  src = src.substring(token.raw.length);
                  var _lastToken2 = tokens[tokens.length - 1];

                  if (token.type === 'link') {
                    token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
                    tokens.push(token);
                  } else if (_lastToken2 && token.type === 'text' && _lastToken2.type === 'text') {
                    _lastToken2.raw += token.raw;
                    _lastToken2.text += token.text;
                  } else {
                    tokens.push(token);
                  }

                  continue;
                } // em & strong


                if (token = this.tokenizer.emStrong(src, maskedSrc, prevChar)) {
                  src = src.substring(token.raw.length);
                  token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
                  tokens.push(token);
                  continue;
                } // code


                if (token = this.tokenizer.codespan(src)) {
                  src = src.substring(token.raw.length);
                  tokens.push(token);
                  continue;
                } // br


                if (token = this.tokenizer.br(src)) {
                  src = src.substring(token.raw.length);
                  tokens.push(token);
                  continue;
                } // del (gfm)


                if (token = this.tokenizer.del(src)) {
                  src = src.substring(token.raw.length);
                  token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
                  tokens.push(token);
                  continue;
                } // autolink


                if (token = this.tokenizer.autolink(src, mangle)) {
                  src = src.substring(token.raw.length);
                  tokens.push(token);
                  continue;
                } // url (gfm)


                if (!inLink && (token = this.tokenizer.url(src, mangle))) {
                  src = src.substring(token.raw.length);
                  tokens.push(token);
                  continue;
                } // text


                if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
                  src = src.substring(token.raw.length);

                  if (token.raw.slice(-1) !== '_') {
                    // Track prevChar before string of ____ started
                    prevChar = token.raw.slice(-1);
                  }

                  keepPrevChar = true;
                  lastToken = tokens[tokens.length - 1];

                  if (lastToken && lastToken.type === 'text') {
                    lastToken.raw += token.raw;
                    lastToken.text += token.text;
                  } else {
                    tokens.push(token);
                  }

                  continue;
                }

                if (src) {
                  var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);

                  if (this.options.silent) {
                    console.error(errMsg);
                    break;
                  } else {
                    throw new Error(errMsg);
                  }
                }
              }

              return tokens;
            }
          }], [{
            key: "rules",
            get: function get() {
              return {
                block: block,
                inline: inline
              };
            }
            /**
             * Static Lex Method
             */

          }, {
            key: "lex",
            value: function lex(src, options) {
              var lexer = new Lexer(options);
              return lexer.lex(src);
            }
            /**
             * Static Lex Inline Method
             */

          }, {
            key: "lexInline",
            value: function lexInline(src, options) {
              var lexer = new Lexer(options);
              return lexer.inlineTokens(src);
            }
          }]);

          return Lexer;
        }();

        var defaults$2 = defaults$5.defaults;
        var cleanUrl = helpers.cleanUrl,
            escape$2 = helpers.escape;
        /**
         * Renderer
         */

        var Renderer_1 = /*#__PURE__*/function () {
          function Renderer(options) {
            _classCallCheck$1(this, Renderer);

            this.options = options || defaults$2;
          }

          _createClass$1(Renderer, [{
            key: "code",
            value: function code(_code, infostring, escaped) {
              var lang = (infostring || '').match(/\S*/)[0];

              if (this.options.highlight) {
                var out = this.options.highlight(_code, lang);

                if (out != null && out !== _code) {
                  escaped = true;
                  _code = out;
                }
              }

              _code = _code.replace(/\n$/, '') + '\n';

              if (!lang) {
                return '<pre><code>' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
              }

              return '<pre><code class="' + this.options.langPrefix + escape$2(lang, true) + '">' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
            }
          }, {
            key: "blockquote",
            value: function blockquote(quote) {
              return '<blockquote>\n' + quote + '</blockquote>\n';
            }
          }, {
            key: "html",
            value: function html(_html) {
              return _html;
            }
          }, {
            key: "heading",
            value: function heading(text, level, raw, slugger) {
              if (this.options.headerIds) {
                return '<h' + level + ' id="' + this.options.headerPrefix + slugger.slug(raw) + '">' + text + '</h' + level + '>\n';
              } // ignore IDs


              return '<h' + level + '>' + text + '</h' + level + '>\n';
            }
          }, {
            key: "hr",
            value: function hr() {
              return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
            }
          }, {
            key: "list",
            value: function list(body, ordered, start) {
              var type = ordered ? 'ol' : 'ul',
                  startatt = ordered && start !== 1 ? ' start="' + start + '"' : '';
              return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
            }
          }, {
            key: "listitem",
            value: function listitem(text) {
              return '<li>' + text + '</li>\n';
            }
          }, {
            key: "checkbox",
            value: function checkbox(checked) {
              return '<input ' + (checked ? 'checked="" ' : '') + 'disabled="" type="checkbox"' + (this.options.xhtml ? ' /' : '') + '> ';
            }
          }, {
            key: "paragraph",
            value: function paragraph(text) {
              return '<p>' + text + '</p>\n';
            }
          }, {
            key: "table",
            value: function table(header, body) {
              if (body) body = '<tbody>' + body + '</tbody>';
              return '<table>\n' + '<thead>\n' + header + '</thead>\n' + body + '</table>\n';
            }
          }, {
            key: "tablerow",
            value: function tablerow(content) {
              return '<tr>\n' + content + '</tr>\n';
            }
          }, {
            key: "tablecell",
            value: function tablecell(content, flags) {
              var type = flags.header ? 'th' : 'td';
              var tag = flags.align ? '<' + type + ' align="' + flags.align + '">' : '<' + type + '>';
              return tag + content + '</' + type + '>\n';
            } // span level renderer

          }, {
            key: "strong",
            value: function strong(text) {
              return '<strong>' + text + '</strong>';
            }
          }, {
            key: "em",
            value: function em(text) {
              return '<em>' + text + '</em>';
            }
          }, {
            key: "codespan",
            value: function codespan(text) {
              return '<code>' + text + '</code>';
            }
          }, {
            key: "br",
            value: function br() {
              return this.options.xhtml ? '<br/>' : '<br>';
            }
          }, {
            key: "del",
            value: function del(text) {
              return '<del>' + text + '</del>';
            }
          }, {
            key: "link",
            value: function link(href, title, text) {
              href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);

              if (href === null) {
                return text;
              }

              var out = '<a href="' + escape$2(href) + '"';

              if (title) {
                out += ' title="' + title + '"';
              }

              out += '>' + text + '</a>';
              return out;
            }
          }, {
            key: "image",
            value: function image(href, title, text) {
              href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);

              if (href === null) {
                return text;
              }

              var out = '<img src="' + href + '" alt="' + text + '"';

              if (title) {
                out += ' title="' + title + '"';
              }

              out += this.options.xhtml ? '/>' : '>';
              return out;
            }
          }, {
            key: "text",
            value: function text(_text) {
              return _text;
            }
          }]);

          return Renderer;
        }();

        /**
         * TextRenderer
         * returns only the textual part of the token
         */
        var TextRenderer_1 = /*#__PURE__*/function () {
          function TextRenderer() {
            _classCallCheck$1(this, TextRenderer);
          }

          _createClass$1(TextRenderer, [{
            key: "strong",
            value: // no need for block level renderers
            function strong(text) {
              return text;
            }
          }, {
            key: "em",
            value: function em(text) {
              return text;
            }
          }, {
            key: "codespan",
            value: function codespan(text) {
              return text;
            }
          }, {
            key: "del",
            value: function del(text) {
              return text;
            }
          }, {
            key: "html",
            value: function html(text) {
              return text;
            }
          }, {
            key: "text",
            value: function text(_text) {
              return _text;
            }
          }, {
            key: "link",
            value: function link(href, title, text) {
              return '' + text;
            }
          }, {
            key: "image",
            value: function image(href, title, text) {
              return '' + text;
            }
          }, {
            key: "br",
            value: function br() {
              return '';
            }
          }]);

          return TextRenderer;
        }();

        /**
         * Slugger generates header id
         */
        var Slugger_1 = /*#__PURE__*/function () {
          function Slugger() {
            _classCallCheck$1(this, Slugger);

            this.seen = {};
          }

          _createClass$1(Slugger, [{
            key: "serialize",
            value: function serialize(value) {
              return value.toLowerCase().trim() // remove html tags
              .replace(/<[!\/a-z].*?>/ig, '') // remove unwanted chars
              .replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g, '').replace(/\s/g, '-');
            }
            /**
             * Finds the next safe (unique) slug to use
             */

          }, {
            key: "getNextSafeSlug",
            value: function getNextSafeSlug(originalSlug, isDryRun) {
              var slug = originalSlug;
              var occurenceAccumulator = 0;

              if (this.seen.hasOwnProperty(slug)) {
                occurenceAccumulator = this.seen[originalSlug];

                do {
                  occurenceAccumulator++;
                  slug = originalSlug + '-' + occurenceAccumulator;
                } while (this.seen.hasOwnProperty(slug));
              }

              if (!isDryRun) {
                this.seen[originalSlug] = occurenceAccumulator;
                this.seen[slug] = 0;
              }

              return slug;
            }
            /**
             * Convert string to unique id
             * @param {object} options
             * @param {boolean} options.dryrun Generates the next unique slug without updating the internal accumulator.
             */

          }, {
            key: "slug",
            value: function slug(value) {
              var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
              var slug = this.serialize(value);
              return this.getNextSafeSlug(slug, options.dryrun);
            }
          }]);

          return Slugger;
        }();

        var defaults$1 = defaults$5.defaults;
        var unescape$1 = helpers.unescape;
        /**
         * Parsing & Compiling
         */

        var Parser_1 = /*#__PURE__*/function () {
          function Parser(options) {
            _classCallCheck$1(this, Parser);

            this.options = options || defaults$1;
            this.options.renderer = this.options.renderer || new Renderer_1();
            this.renderer = this.options.renderer;
            this.renderer.options = this.options;
            this.textRenderer = new TextRenderer_1();
            this.slugger = new Slugger_1();
          }
          /**
           * Static Parse Method
           */


          _createClass$1(Parser, [{
            key: "parse",
            value:
            /**
             * Parse Loop
             */
            function parse(tokens) {
              var top = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
              var out = '',
                  i,
                  j,
                  k,
                  l2,
                  l3,
                  row,
                  cell,
                  header,
                  body,
                  token,
                  ordered,
                  start,
                  loose,
                  itemBody,
                  item,
                  checked,
                  task,
                  checkbox;
              var l = tokens.length;

              for (i = 0; i < l; i++) {
                token = tokens[i];

                switch (token.type) {
                  case 'space':
                    {
                      continue;
                    }

                  case 'hr':
                    {
                      out += this.renderer.hr();
                      continue;
                    }

                  case 'heading':
                    {
                      out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$1(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
                      continue;
                    }

                  case 'code':
                    {
                      out += this.renderer.code(token.text, token.lang, token.escaped);
                      continue;
                    }

                  case 'table':
                    {
                      header = ''; // header

                      cell = '';
                      l2 = token.header.length;

                      for (j = 0; j < l2; j++) {
                        cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
                          header: true,
                          align: token.align[j]
                        });
                      }

                      header += this.renderer.tablerow(cell);
                      body = '';
                      l2 = token.cells.length;

                      for (j = 0; j < l2; j++) {
                        row = token.tokens.cells[j];
                        cell = '';
                        l3 = row.length;

                        for (k = 0; k < l3; k++) {
                          cell += this.renderer.tablecell(this.parseInline(row[k]), {
                            header: false,
                            align: token.align[k]
                          });
                        }

                        body += this.renderer.tablerow(cell);
                      }

                      out += this.renderer.table(header, body);
                      continue;
                    }

                  case 'blockquote':
                    {
                      body = this.parse(token.tokens);
                      out += this.renderer.blockquote(body);
                      continue;
                    }

                  case 'list':
                    {
                      ordered = token.ordered;
                      start = token.start;
                      loose = token.loose;
                      l2 = token.items.length;
                      body = '';

                      for (j = 0; j < l2; j++) {
                        item = token.items[j];
                        checked = item.checked;
                        task = item.task;
                        itemBody = '';

                        if (item.task) {
                          checkbox = this.renderer.checkbox(checked);

                          if (loose) {
                            if (item.tokens.length > 0 && item.tokens[0].type === 'text') {
                              item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;

                              if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {
                                item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;
                              }
                            } else {
                              item.tokens.unshift({
                                type: 'text',
                                text: checkbox
                              });
                            }
                          } else {
                            itemBody += checkbox;
                          }
                        }

                        itemBody += this.parse(item.tokens, loose);
                        body += this.renderer.listitem(itemBody, task, checked);
                      }

                      out += this.renderer.list(body, ordered, start);
                      continue;
                    }

                  case 'html':
                    {
                      // TODO parse inline content if parameter markdown=1
                      out += this.renderer.html(token.text);
                      continue;
                    }

                  case 'paragraph':
                    {
                      out += this.renderer.paragraph(this.parseInline(token.tokens));
                      continue;
                    }

                  case 'text':
                    {
                      body = token.tokens ? this.parseInline(token.tokens) : token.text;

                      while (i + 1 < l && tokens[i + 1].type === 'text') {
                        token = tokens[++i];
                        body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
                      }

                      out += top ? this.renderer.paragraph(body) : body;
                      continue;
                    }

                  default:
                    {
                      var errMsg = 'Token with "' + token.type + '" type was not found.';

                      if (this.options.silent) {
                        console.error(errMsg);
                        return;
                      } else {
                        throw new Error(errMsg);
                      }
                    }
                }
              }

              return out;
            }
            /**
             * Parse Inline Tokens
             */

          }, {
            key: "parseInline",
            value: function parseInline(tokens, renderer) {
              renderer = renderer || this.renderer;
              var out = '',
                  i,
                  token;
              var l = tokens.length;

              for (i = 0; i < l; i++) {
                token = tokens[i];

                switch (token.type) {
                  case 'escape':
                    {
                      out += renderer.text(token.text);
                      break;
                    }

                  case 'html':
                    {
                      out += renderer.html(token.text);
                      break;
                    }

                  case 'link':
                    {
                      out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
                      break;
                    }

                  case 'image':
                    {
                      out += renderer.image(token.href, token.title, token.text);
                      break;
                    }

                  case 'strong':
                    {
                      out += renderer.strong(this.parseInline(token.tokens, renderer));
                      break;
                    }

                  case 'em':
                    {
                      out += renderer.em(this.parseInline(token.tokens, renderer));
                      break;
                    }

                  case 'codespan':
                    {
                      out += renderer.codespan(token.text);
                      break;
                    }

                  case 'br':
                    {
                      out += renderer.br();
                      break;
                    }

                  case 'del':
                    {
                      out += renderer.del(this.parseInline(token.tokens, renderer));
                      break;
                    }

                  case 'text':
                    {
                      out += renderer.text(token.text);
                      break;
                    }

                  default:
                    {
                      var errMsg = 'Token with "' + token.type + '" type was not found.';

                      if (this.options.silent) {
                        console.error(errMsg);
                        return;
                      } else {
                        throw new Error(errMsg);
                      }
                    }
                }
              }

              return out;
            }
          }], [{
            key: "parse",
            value: function parse(tokens, options) {
              var parser = new Parser(options);
              return parser.parse(tokens);
            }
            /**
             * Static Parse Inline Method
             */

          }, {
            key: "parseInline",
            value: function parseInline(tokens, options) {
              var parser = new Parser(options);
              return parser.parseInline(tokens);
            }
          }]);

          return Parser;
        }();

        var merge = helpers.merge,
            checkSanitizeDeprecation = helpers.checkSanitizeDeprecation,
            escape$1 = helpers.escape;
        var getDefaults = defaults$5.getDefaults,
            changeDefaults = defaults$5.changeDefaults,
            defaults = defaults$5.defaults;
        /**
         * Marked
         */

        function marked(src, opt, callback) {
          // throw error in case of non string input
          if (typeof src === 'undefined' || src === null) {
            throw new Error('marked(): input parameter is undefined or null');
          }

          if (typeof src !== 'string') {
            throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
          }

          if (typeof opt === 'function') {
            callback = opt;
            opt = null;
          }

          opt = merge({}, marked.defaults, opt || {});
          checkSanitizeDeprecation(opt);

          if (callback) {
            var highlight = opt.highlight;
            var tokens;

            try {
              tokens = Lexer_1.lex(src, opt);
            } catch (e) {
              return callback(e);
            }

            var done = function done(err) {
              var out;

              if (!err) {
                try {
                  if (opt.walkTokens) {
                    marked.walkTokens(tokens, opt.walkTokens);
                  }

                  out = Parser_1.parse(tokens, opt);
                } catch (e) {
                  err = e;
                }
              }

              opt.highlight = highlight;
              return err ? callback(err) : callback(null, out);
            };

            if (!highlight || highlight.length < 3) {
              return done();
            }

            delete opt.highlight;
            if (!tokens.length) return done();
            var pending = 0;
            marked.walkTokens(tokens, function (token) {
              if (token.type === 'code') {
                pending++;
                setTimeout(function () {
                  highlight(token.text, token.lang, function (err, code) {
                    if (err) {
                      return done(err);
                    }

                    if (code != null && code !== token.text) {
                      token.text = code;
                      token.escaped = true;
                    }

                    pending--;

                    if (pending === 0) {
                      done();
                    }
                  });
                }, 0);
              }
            });

            if (pending === 0) {
              done();
            }

            return;
          }

          try {
            var _tokens = Lexer_1.lex(src, opt);

            if (opt.walkTokens) {
              marked.walkTokens(_tokens, opt.walkTokens);
            }

            return Parser_1.parse(_tokens, opt);
          } catch (e) {
            e.message += '\nPlease report this to https://github.com/markedjs/marked.';

            if (opt.silent) {
              return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
            }

            throw e;
          }
        }
        /**
         * Options
         */


        marked.options = marked.setOptions = function (opt) {
          merge(marked.defaults, opt);
          changeDefaults(marked.defaults);
          return marked;
        };

        marked.getDefaults = getDefaults;
        marked.defaults = defaults;
        /**
         * Use Extension
         */

        marked.use = function (extension) {
          var opts = merge({}, extension);

          if (extension.renderer) {
            (function () {
              var renderer = marked.defaults.renderer || new Renderer_1();

              var _loop = function _loop(prop) {
                var prevRenderer = renderer[prop];

                renderer[prop] = function () {
                  for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
                    args[_key] = arguments[_key];
                  }

                  var ret = extension.renderer[prop].apply(renderer, args);

                  if (ret === false) {
                    ret = prevRenderer.apply(renderer, args);
                  }

                  return ret;
                };
              };

              for (var prop in extension.renderer) {
                _loop(prop);
              }

              opts.renderer = renderer;
            })();
          }

          if (extension.tokenizer) {
            (function () {
              var tokenizer = marked.defaults.tokenizer || new Tokenizer_1();

              var _loop2 = function _loop2(prop) {
                var prevTokenizer = tokenizer[prop];

                tokenizer[prop] = function () {
                  for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
                    args[_key2] = arguments[_key2];
                  }

                  var ret = extension.tokenizer[prop].apply(tokenizer, args);

                  if (ret === false) {
                    ret = prevTokenizer.apply(tokenizer, args);
                  }

                  return ret;
                };
              };

              for (var prop in extension.tokenizer) {
                _loop2(prop);
              }

              opts.tokenizer = tokenizer;
            })();
          }

          if (extension.walkTokens) {
            var walkTokens = marked.defaults.walkTokens;

            opts.walkTokens = function (token) {
              extension.walkTokens(token);

              if (walkTokens) {
                walkTokens(token);
              }
            };
          }

          marked.setOptions(opts);
        };
        /**
         * Run callback for every token
         */


        marked.walkTokens = function (tokens, callback) {
          var _iterator = _createForOfIteratorHelper(tokens),
              _step;

          try {
            for (_iterator.s(); !(_step = _iterator.n()).done;) {
              var token = _step.value;
              callback(token);

              switch (token.type) {
                case 'table':
                  {
                    var _iterator2 = _createForOfIteratorHelper(token.tokens.header),
                        _step2;

                    try {
                      for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
                        var cell = _step2.value;
                        marked.walkTokens(cell, callback);
                      }
                    } catch (err) {
                      _iterator2.e(err);
                    } finally {
                      _iterator2.f();
                    }

                    var _iterator3 = _createForOfIteratorHelper(token.tokens.cells),
                        _step3;

                    try {
                      for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
                        var row = _step3.value;

                        var _iterator4 = _createForOfIteratorHelper(row),
                            _step4;

                        try {
                          for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
                            var _cell = _step4.value;
                            marked.walkTokens(_cell, callback);
                          }
                        } catch (err) {
                          _iterator4.e(err);
                        } finally {
                          _iterator4.f();
                        }
                      }
                    } catch (err) {
                      _iterator3.e(err);
                    } finally {
                      _iterator3.f();
                    }

                    break;
                  }

                case 'list':
                  {
                    marked.walkTokens(token.items, callback);
                    break;
                  }

                default:
                  {
                    if (token.tokens) {
                      marked.walkTokens(token.tokens, callback);
                    }
                  }
              }
            }
          } catch (err) {
            _iterator.e(err);
          } finally {
            _iterator.f();
          }
        };
        /**
         * Parse Inline
         */


        marked.parseInline = function (src, opt) {
          // throw error in case of non string input
          if (typeof src === 'undefined' || src === null) {
            throw new Error('marked.parseInline(): input parameter is undefined or null');
          }

          if (typeof src !== 'string') {
            throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
          }

          opt = merge({}, marked.defaults, opt || {});
          checkSanitizeDeprecation(opt);

          try {
            var tokens = Lexer_1.lexInline(src, opt);

            if (opt.walkTokens) {
              marked.walkTokens(tokens, opt.walkTokens);
            }

            return Parser_1.parseInline(tokens, opt);
          } catch (e) {
            e.message += '\nPlease report this to https://github.com/markedjs/marked.';

            if (opt.silent) {
              return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
            }

            throw e;
          }
        };
        /**
         * Expose
         */


        marked.Parser = Parser_1;
        marked.parser = Parser_1.parse;
        marked.Renderer = Renderer_1;
        marked.TextRenderer = TextRenderer_1;
        marked.Lexer = Lexer_1;
        marked.lexer = Lexer_1.lex;
        marked.Tokenizer = Tokenizer_1;
        marked.Slugger = Slugger_1;
        marked.parse = marked;
        var marked_1 = marked;

        var tiler$4 = utilTiler();
        var dispatch$5 = dispatch$8('loaded');
        var _tileZoom$1 = 14;
        var _osmoseUrlRoot = 'https://osmose.openstreetmap.fr/api/0.3';
        var _osmoseData = {
          icons: {},
          items: []
        }; // This gets reassigned if reset

        var _cache;

        function abortRequest$4(controller) {
          if (controller) {
            controller.abort();
          }
        }

        function abortUnwantedRequests$1(cache, tiles) {
          Object.keys(cache.inflightTile).forEach(function (k) {
            var wanted = tiles.find(function (tile) {
              return k === tile.id;
            });

            if (!wanted) {
              abortRequest$4(cache.inflightTile[k]);
              delete cache.inflightTile[k];
            }
          });
        }

        function encodeIssueRtree(d) {
          return {
            minX: d.loc[0],
            minY: d.loc[1],
            maxX: d.loc[0],
            maxY: d.loc[1],
            data: d
          };
        } // Replace or remove QAItem from rtree


        function updateRtree$1(item, replace) {
          _cache.rtree.remove(item, function (a, b) {
            return a.data.id === b.data.id;
          });

          if (replace) {
            _cache.rtree.insert(item);
          }
        } // Issues shouldn't obscure each other


        function preventCoincident(loc) {
          var coincident = false;

          do {
            // first time, move marker up. after that, move marker right.
            var delta = coincident ? [0.00001, 0] : [0, 0.00001];
            loc = geoVecAdd(loc, delta);
            var bbox = geoExtent(loc).bbox();
            coincident = _cache.rtree.search(bbox).length;
          } while (coincident);

          return loc;
        }

        var serviceOsmose = {
          title: 'osmose',
          init: function init() {
            _mainFileFetcher.get('qa_data').then(function (d) {
              _osmoseData = d.osmose;
              _osmoseData.items = Object.keys(d.osmose.icons).map(function (s) {
                return s.split('-')[0];
              }).reduce(function (unique, item) {
                return unique.indexOf(item) !== -1 ? unique : [].concat(_toConsumableArray(unique), [item]);
              }, []);
            });

            if (!_cache) {
              this.reset();
            }

            this.event = utilRebind(this, dispatch$5, 'on');
          },
          reset: function reset() {
            var _strings = {};
            var _colors = {};

            if (_cache) {
              Object.values(_cache.inflightTile).forEach(abortRequest$4); // Strings and colors are static and should not be re-populated

              _strings = _cache.strings;
              _colors = _cache.colors;
            }

            _cache = {
              data: {},
              loadedTile: {},
              inflightTile: {},
              inflightPost: {},
              closed: {},
              rtree: new RBush(),
              strings: _strings,
              colors: _colors
            };
          },
          loadIssues: function loadIssues(projection) {
            var _this = this;

            var params = {
              // Tiles return a maximum # of issues
              // So we want to filter our request for only types iD supports
              item: _osmoseData.items
            }; // determine the needed tiles to cover the view

            var tiles = tiler$4.zoomExtent([_tileZoom$1, _tileZoom$1]).getTiles(projection); // abort inflight requests that are no longer needed

            abortUnwantedRequests$1(_cache, tiles); // issue new requests..

            tiles.forEach(function (tile) {
              if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) return;

              var _tile$xyz = _slicedToArray(tile.xyz, 3),
                  x = _tile$xyz[0],
                  y = _tile$xyz[1],
                  z = _tile$xyz[2];

              var url = "".concat(_osmoseUrlRoot, "/issues/").concat(z, "/").concat(x, "/").concat(y, ".json?") + utilQsString(params);
              var controller = new AbortController();
              _cache.inflightTile[tile.id] = controller;
              d3_json(url, {
                signal: controller.signal
              }).then(function (data) {
                delete _cache.inflightTile[tile.id];
                _cache.loadedTile[tile.id] = true;

                if (data.features) {
                  data.features.forEach(function (issue) {
                    var _issue$properties = issue.properties,
                        item = _issue$properties.item,
                        cl = _issue$properties["class"],
                        id = _issue$properties.uuid;
                    /* Osmose issues are uniquely identified by a unique
                      `item` and `class` combination (both integer values) */

                    var itemType = "".concat(item, "-").concat(cl); // Filter out unsupported issue types (some are too specific or advanced)

                    if (itemType in _osmoseData.icons) {
                      var loc = issue.geometry.coordinates; // lon, lat

                      loc = preventCoincident(loc);
                      var d = new QAItem(loc, _this, itemType, id, {
                        item: item
                      }); // Setting elems here prevents UI detail requests

                      if (item === 8300 || item === 8360) {
                        d.elems = [];
                      }

                      _cache.data[d.id] = d;

                      _cache.rtree.insert(encodeIssueRtree(d));
                    }
                  });
                }

                dispatch$5.call('loaded');
              })["catch"](function () {
                delete _cache.inflightTile[tile.id];
                _cache.loadedTile[tile.id] = true;
              });
            });
          },
          loadIssueDetail: function loadIssueDetail(issue) {
            var _this2 = this;

            // Issue details only need to be fetched once
            if (issue.elems !== undefined) {
              return Promise.resolve(issue);
            }

            var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "?langs=").concat(_mainLocalizer.localeCode());

            var cacheDetails = function cacheDetails(data) {
              // Associated elements used for highlighting
              // Assign directly for immediate use in the callback
              issue.elems = data.elems.map(function (e) {
                return e.type.substring(0, 1) + e.id;
              }); // Some issues have instance specific detail in a subtitle

              issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';

              _this2.replaceItem(issue);
            };

            return d3_json(url).then(cacheDetails).then(function () {
              return issue;
            });
          },
          loadStrings: function loadStrings() {
            var locale = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : _mainLocalizer.localeCode();
            var items = Object.keys(_osmoseData.icons);

            if (locale in _cache.strings && Object.keys(_cache.strings[locale]).length === items.length) {
              return Promise.resolve(_cache.strings[locale]);
            } // May be partially populated already if some requests were successful


            if (!(locale in _cache.strings)) {
              _cache.strings[locale] = {};
            } // Only need to cache strings for supported issue types
            // Using multiple individual item + class requests to reduce fetched data size


            var allRequests = items.map(function (itemType) {
              // No need to request data we already have
              if (itemType in _cache.strings[locale]) return null;

              var cacheData = function cacheData(data) {
                // Bunch of nested single value arrays of objects
                var _data$categories = _slicedToArray(data.categories, 1),
                    _data$categories$ = _data$categories[0],
                    cat = _data$categories$ === void 0 ? {
                  items: []
                } : _data$categories$;

                var _cat$items = _slicedToArray(cat.items, 1),
                    _cat$items$ = _cat$items[0],
                    item = _cat$items$ === void 0 ? {
                  "class": []
                } : _cat$items$;

                var _item$class = _slicedToArray(item["class"], 1),
                    _item$class$ = _item$class[0],
                    cl = _item$class$ === void 0 ? null : _item$class$; // If null default value is reached, data wasn't as expected (or was empty)


                if (!cl) {
                  /* eslint-disable no-console */
                  console.log("Osmose strings request (".concat(itemType, ") had unexpected data"));
                  /* eslint-enable no-console */

                  return;
                } // Cache served item colors to automatically style issue markers later


                var itemInt = item.item,
                    color = item.color;

                if (/^#[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/.test(color)) {
                  _cache.colors[itemInt] = color;
                } // Value of root key will be null if no string exists
                // If string exists, value is an object with key 'auto' for string


                var title = cl.title,
                    detail = cl.detail,
                    fix = cl.fix,
                    trap = cl.trap; // Osmose titles shouldn't contain markdown

                var issueStrings = {};
                if (title) issueStrings.title = title.auto;
                if (detail) issueStrings.detail = marked_1(detail.auto);
                if (trap) issueStrings.trap = marked_1(trap.auto);
                if (fix) issueStrings.fix = marked_1(fix.auto);
                _cache.strings[locale][itemType] = issueStrings;
              };

              var _itemType$split = itemType.split('-'),
                  _itemType$split2 = _slicedToArray(_itemType$split, 2),
                  item = _itemType$split2[0],
                  cl = _itemType$split2[1]; // Osmose API falls back to English strings where untranslated or if locale doesn't exist


              var url = "".concat(_osmoseUrlRoot, "/items/").concat(item, "/class/").concat(cl, "?langs=").concat(locale);
              return d3_json(url).then(cacheData);
            }).filter(Boolean);
            return Promise.all(allRequests).then(function () {
              return _cache.strings[locale];
            });
          },
          getStrings: function getStrings(itemType) {
            var locale = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : _mainLocalizer.localeCode();
            // No need to fallback to English, Osmose API handles this for us
            return locale in _cache.strings ? _cache.strings[locale][itemType] : {};
          },
          getColor: function getColor(itemType) {
            return itemType in _cache.colors ? _cache.colors[itemType] : '#FFFFFF';
          },
          postUpdate: function postUpdate(issue, callback) {
            var _this3 = this;

            if (_cache.inflightPost[issue.id]) {
              return callback({
                message: 'Issue update already inflight',
                status: -2
              }, issue);
            } // UI sets the status to either 'done' or 'false'


            var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "/").concat(issue.newStatus);
            var controller = new AbortController();

            var after = function after() {
              delete _cache.inflightPost[issue.id];

              _this3.removeItem(issue);

              if (issue.newStatus === 'done') {
                // Keep track of the number of issues closed per `item` to tag the changeset
                if (!(issue.item in _cache.closed)) {
                  _cache.closed[issue.item] = 0;
                }

                _cache.closed[issue.item] += 1;
              }

              if (callback) callback(null, issue);
            };

            _cache.inflightPost[issue.id] = controller;
            fetch(url, {
              signal: controller.signal
            }).then(after)["catch"](function (err) {
              delete _cache.inflightPost[issue.id];
              if (callback) callback(err.message);
            });
          },
          // Get all cached QAItems covering the viewport
          getItems: function getItems(projection) {
            var viewport = projection.clipExtent();
            var min = [viewport[0][0], viewport[1][1]];
            var max = [viewport[1][0], viewport[0][1]];
            var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
            return _cache.rtree.search(bbox).map(function (d) {
              return d.data;
            });
          },
          // Get a QAItem from cache
          // NOTE: Don't change method name until UI v3 is merged
          getError: function getError(id) {
            return _cache.data[id];
          },
          // get the name of the icon to display for this item
          getIcon: function getIcon(itemType) {
            return _osmoseData.icons[itemType];
          },
          // Replace a single QAItem in the cache
          replaceItem: function replaceItem(item) {
            if (!(item instanceof QAItem) || !item.id) return;
            _cache.data[item.id] = item;
            updateRtree$1(encodeIssueRtree(item), true); // true = replace

            return item;
          },
          // Remove a single QAItem from the cache
          removeItem: function removeItem(item) {
            if (!(item instanceof QAItem) || !item.id) return;
            delete _cache.data[item.id];
            updateRtree$1(encodeIssueRtree(item), false); // false = remove
          },
          // Used to populate `closed:osmose:*` changeset tags
          getClosedCounts: function getClosedCounts() {
            return _cache.closed;
          },
          itemURL: function itemURL(item) {
            return "https://osmose.openstreetmap.fr/en/error/".concat(item.id);
          }
        };

        /*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
        var read$6 = function read(buffer, offset, isLE, mLen, nBytes) {
          var e, m;
          var eLen = nBytes * 8 - mLen - 1;
          var eMax = (1 << eLen) - 1;
          var eBias = eMax >> 1;
          var nBits = -7;
          var i = isLE ? nBytes - 1 : 0;
          var d = isLE ? -1 : 1;
          var s = buffer[offset + i];
          i += d;
          e = s & (1 << -nBits) - 1;
          s >>= -nBits;
          nBits += eLen;

          for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}

          m = e & (1 << -nBits) - 1;
          e >>= -nBits;
          nBits += mLen;

          for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}

          if (e === 0) {
            e = 1 - eBias;
          } else if (e === eMax) {
            return m ? NaN : (s ? -1 : 1) * Infinity;
          } else {
            m = m + Math.pow(2, mLen);
            e = e - eBias;
          }

          return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
        };

        var write$6 = function write(buffer, value, offset, isLE, mLen, nBytes) {
          var e, m, c;
          var eLen = nBytes * 8 - mLen - 1;
          var eMax = (1 << eLen) - 1;
          var eBias = eMax >> 1;
          var rt = mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0;
          var i = isLE ? 0 : nBytes - 1;
          var d = isLE ? 1 : -1;
          var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;
          value = Math.abs(value);

          if (isNaN(value) || value === Infinity) {
            m = isNaN(value) ? 1 : 0;
            e = eMax;
          } else {
            e = Math.floor(Math.log(value) / Math.LN2);

            if (value * (c = Math.pow(2, -e)) < 1) {
              e--;
              c *= 2;
            }

            if (e + eBias >= 1) {
              value += rt / c;
            } else {
              value += rt * Math.pow(2, 1 - eBias);
            }

            if (value * c >= 2) {
              e++;
              c /= 2;
            }

            if (e + eBias >= eMax) {
              m = 0;
              e = eMax;
            } else if (e + eBias >= 1) {
              m = (value * c - 1) * Math.pow(2, mLen);
              e = e + eBias;
            } else {
              m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
              e = 0;
            }
          }

          for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}

          e = e << mLen | m;
          eLen += mLen;

          for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}

          buffer[offset + i - d] |= s * 128;
        };

        var ieee754 = {
          read: read$6,
          write: write$6
        };

        var pbf = Pbf;

        function Pbf(buf) {
          this.buf = ArrayBuffer.isView && ArrayBuffer.isView(buf) ? buf : new Uint8Array(buf || 0);
          this.pos = 0;
          this.type = 0;
          this.length = this.buf.length;
        }

        Pbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum

        Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64

        Pbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields

        Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32

        var SHIFT_LEFT_32 = (1 << 16) * (1 << 16),
            SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32; // Threshold chosen based on both benchmarking and knowledge about browser string
        // data structures (which currently switch structure types at 12 bytes or more)

        var TEXT_DECODER_MIN_LENGTH = 12;
        var utf8TextDecoder = typeof TextDecoder === 'undefined' ? null : new TextDecoder('utf8');
        Pbf.prototype = {
          destroy: function destroy() {
            this.buf = null;
          },
          // === READING =================================================================
          readFields: function readFields(readField, result, end) {
            end = end || this.length;

            while (this.pos < end) {
              var val = this.readVarint(),
                  tag = val >> 3,
                  startPos = this.pos;
              this.type = val & 0x7;
              readField(tag, result, this);
              if (this.pos === startPos) this.skip(val);
            }

            return result;
          },
          readMessage: function readMessage(readField, result) {
            return this.readFields(readField, result, this.readVarint() + this.pos);
          },
          readFixed32: function readFixed32() {
            var val = readUInt32(this.buf, this.pos);
            this.pos += 4;
            return val;
          },
          readSFixed32: function readSFixed32() {
            var val = readInt32(this.buf, this.pos);
            this.pos += 4;
            return val;
          },
          // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)
          readFixed64: function readFixed64() {
            var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
            this.pos += 8;
            return val;
          },
          readSFixed64: function readSFixed64() {
            var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
            this.pos += 8;
            return val;
          },
          readFloat: function readFloat() {
            var val = ieee754.read(this.buf, this.pos, true, 23, 4);
            this.pos += 4;
            return val;
          },
          readDouble: function readDouble() {
            var val = ieee754.read(this.buf, this.pos, true, 52, 8);
            this.pos += 8;
            return val;
          },
          readVarint: function readVarint(isSigned) {
            var buf = this.buf,
                val,
                b;
            b = buf[this.pos++];
            val = b & 0x7f;
            if (b < 0x80) return val;
            b = buf[this.pos++];
            val |= (b & 0x7f) << 7;
            if (b < 0x80) return val;
            b = buf[this.pos++];
            val |= (b & 0x7f) << 14;
            if (b < 0x80) return val;
            b = buf[this.pos++];
            val |= (b & 0x7f) << 21;
            if (b < 0x80) return val;
            b = buf[this.pos];
            val |= (b & 0x0f) << 28;
            return readVarintRemainder(val, isSigned, this);
          },
          readVarint64: function readVarint64() {
            // for compatibility with v2.0.1
            return this.readVarint(true);
          },
          readSVarint: function readSVarint() {
            var num = this.readVarint();
            return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding
          },
          readBoolean: function readBoolean() {
            return Boolean(this.readVarint());
          },
          readString: function readString() {
            var end = this.readVarint() + this.pos;
            var pos = this.pos;
            this.pos = end;

            if (end - pos >= TEXT_DECODER_MIN_LENGTH && utf8TextDecoder) {
              // longer strings are fast with the built-in browser TextDecoder API
              return readUtf8TextDecoder(this.buf, pos, end);
            } // short strings are fast with our custom implementation


            return readUtf8(this.buf, pos, end);
          },
          readBytes: function readBytes() {
            var end = this.readVarint() + this.pos,
                buffer = this.buf.subarray(this.pos, end);
            this.pos = end;
            return buffer;
          },
          // verbose for performance reasons; doesn't affect gzipped size
          readPackedVarint: function readPackedVarint(arr, isSigned) {
            if (this.type !== Pbf.Bytes) return arr.push(this.readVarint(isSigned));
            var end = readPackedEnd(this);
            arr = arr || [];

            while (this.pos < end) {
              arr.push(this.readVarint(isSigned));
            }

            return arr;
          },
          readPackedSVarint: function readPackedSVarint(arr) {
            if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());
            var end = readPackedEnd(this);
            arr = arr || [];

            while (this.pos < end) {
              arr.push(this.readSVarint());
            }

            return arr;
          },
          readPackedBoolean: function readPackedBoolean(arr) {
            if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());
            var end = readPackedEnd(this);
            arr = arr || [];

            while (this.pos < end) {
              arr.push(this.readBoolean());
            }

            return arr;
          },
          readPackedFloat: function readPackedFloat(arr) {
            if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());
            var end = readPackedEnd(this);
            arr = arr || [];

            while (this.pos < end) {
              arr.push(this.readFloat());
            }

            return arr;
          },
          readPackedDouble: function readPackedDouble(arr) {
            if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());
            var end = readPackedEnd(this);
            arr = arr || [];

            while (this.pos < end) {
              arr.push(this.readDouble());
            }

            return arr;
          },
          readPackedFixed32: function readPackedFixed32(arr) {
            if (this.type !== Pbf.Bytes) return arr.push(this.readFixed32());
            var end = readPackedEnd(this);
            arr = arr || [];

            while (this.pos < end) {
              arr.push(this.readFixed32());
            }

            return arr;
          },
          readPackedSFixed32: function readPackedSFixed32(arr) {
            if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed32());
            var end = readPackedEnd(this);
            arr = arr || [];

            while (this.pos < end) {
              arr.push(this.readSFixed32());
            }

            return arr;
          },
          readPackedFixed64: function readPackedFixed64(arr) {
            if (this.type !== Pbf.Bytes) return arr.push(this.readFixed64());
            var end = readPackedEnd(this);
            arr = arr || [];

            while (this.pos < end) {
              arr.push(this.readFixed64());
            }

            return arr;
          },
          readPackedSFixed64: function readPackedSFixed64(arr) {
            if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());
            var end = readPackedEnd(this);
            arr = arr || [];

            while (this.pos < end) {
              arr.push(this.readSFixed64());
            }

            return arr;
          },
          skip: function skip(val) {
            var type = val & 0x7;
            if (type === Pbf.Varint) while (this.buf[this.pos++] > 0x7f) {} else if (type === Pbf.Bytes) this.pos = this.readVarint() + this.pos;else if (type === Pbf.Fixed32) this.pos += 4;else if (type === Pbf.Fixed64) this.pos += 8;else throw new Error('Unimplemented type: ' + type);
          },
          // === WRITING =================================================================
          writeTag: function writeTag(tag, type) {
            this.writeVarint(tag << 3 | type);
          },
          realloc: function realloc(min) {
            var length = this.length || 16;

            while (length < this.pos + min) {
              length *= 2;
            }

            if (length !== this.length) {
              var buf = new Uint8Array(length);
              buf.set(this.buf);
              this.buf = buf;
              this.length = length;
            }
          },
          finish: function finish() {
            this.length = this.pos;
            this.pos = 0;
            return this.buf.subarray(0, this.length);
          },
          writeFixed32: function writeFixed32(val) {
            this.realloc(4);
            writeInt32(this.buf, val, this.pos);
            this.pos += 4;
          },
          writeSFixed32: function writeSFixed32(val) {
            this.realloc(4);
            writeInt32(this.buf, val, this.pos);
            this.pos += 4;
          },
          writeFixed64: function writeFixed64(val) {
            this.realloc(8);
            writeInt32(this.buf, val & -1, this.pos);
            writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
            this.pos += 8;
          },
          writeSFixed64: function writeSFixed64(val) {
            this.realloc(8);
            writeInt32(this.buf, val & -1, this.pos);
            writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
            this.pos += 8;
          },
          writeVarint: function writeVarint(val) {
            val = +val || 0;

            if (val > 0xfffffff || val < 0) {
              writeBigVarint(val, this);
              return;
            }

            this.realloc(4);
            this.buf[this.pos++] = val & 0x7f | (val > 0x7f ? 0x80 : 0);
            if (val <= 0x7f) return;
            this.buf[this.pos++] = (val >>>= 7) & 0x7f | (val > 0x7f ? 0x80 : 0);
            if (val <= 0x7f) return;
            this.buf[this.pos++] = (val >>>= 7) & 0x7f | (val > 0x7f ? 0x80 : 0);
            if (val <= 0x7f) return;
            this.buf[this.pos++] = val >>> 7 & 0x7f;
          },
          writeSVarint: function writeSVarint(val) {
            this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);
          },
          writeBoolean: function writeBoolean(val) {
            this.writeVarint(Boolean(val));
          },
          writeString: function writeString(str) {
            str = String(str);
            this.realloc(str.length * 4);
            this.pos++; // reserve 1 byte for short string length

            var startPos = this.pos; // write the string directly to the buffer and see how much was written

            this.pos = writeUtf8(this.buf, str, this.pos);
            var len = this.pos - startPos;
            if (len >= 0x80) makeRoomForExtraLength(startPos, len, this); // finally, write the message length in the reserved place and restore the position

            this.pos = startPos - 1;
            this.writeVarint(len);
            this.pos += len;
          },
          writeFloat: function writeFloat(val) {
            this.realloc(4);
            ieee754.write(this.buf, val, this.pos, true, 23, 4);
            this.pos += 4;
          },
          writeDouble: function writeDouble(val) {
            this.realloc(8);
            ieee754.write(this.buf, val, this.pos, true, 52, 8);
            this.pos += 8;
          },
          writeBytes: function writeBytes(buffer) {
            var len = buffer.length;
            this.writeVarint(len);
            this.realloc(len);

            for (var i = 0; i < len; i++) {
              this.buf[this.pos++] = buffer[i];
            }
          },
          writeRawMessage: function writeRawMessage(fn, obj) {
            this.pos++; // reserve 1 byte for short message length
            // write the message directly to the buffer and see how much was written

            var startPos = this.pos;
            fn(obj, this);
            var len = this.pos - startPos;
            if (len >= 0x80) makeRoomForExtraLength(startPos, len, this); // finally, write the message length in the reserved place and restore the position

            this.pos = startPos - 1;
            this.writeVarint(len);
            this.pos += len;
          },
          writeMessage: function writeMessage(tag, fn, obj) {
            this.writeTag(tag, Pbf.Bytes);
            this.writeRawMessage(fn, obj);
          },
          writePackedVarint: function writePackedVarint(tag, arr) {
            if (arr.length) this.writeMessage(tag, _writePackedVarint, arr);
          },
          writePackedSVarint: function writePackedSVarint(tag, arr) {
            if (arr.length) this.writeMessage(tag, _writePackedSVarint, arr);
          },
          writePackedBoolean: function writePackedBoolean(tag, arr) {
            if (arr.length) this.writeMessage(tag, _writePackedBoolean, arr);
          },
          writePackedFloat: function writePackedFloat(tag, arr) {
            if (arr.length) this.writeMessage(tag, _writePackedFloat, arr);
          },
          writePackedDouble: function writePackedDouble(tag, arr) {
            if (arr.length) this.writeMessage(tag, _writePackedDouble, arr);
          },
          writePackedFixed32: function writePackedFixed32(tag, arr) {
            if (arr.length) this.writeMessage(tag, _writePackedFixed, arr);
          },
          writePackedSFixed32: function writePackedSFixed32(tag, arr) {
            if (arr.length) this.writeMessage(tag, _writePackedSFixed, arr);
          },
          writePackedFixed64: function writePackedFixed64(tag, arr) {
            if (arr.length) this.writeMessage(tag, _writePackedFixed2, arr);
          },
          writePackedSFixed64: function writePackedSFixed64(tag, arr) {
            if (arr.length) this.writeMessage(tag, _writePackedSFixed2, arr);
          },
          writeBytesField: function writeBytesField(tag, buffer) {
            this.writeTag(tag, Pbf.Bytes);
            this.writeBytes(buffer);
          },
          writeFixed32Field: function writeFixed32Field(tag, val) {
            this.writeTag(tag, Pbf.Fixed32);
            this.writeFixed32(val);
          },
          writeSFixed32Field: function writeSFixed32Field(tag, val) {
            this.writeTag(tag, Pbf.Fixed32);
            this.writeSFixed32(val);
          },
          writeFixed64Field: function writeFixed64Field(tag, val) {
            this.writeTag(tag, Pbf.Fixed64);
            this.writeFixed64(val);
          },
          writeSFixed64Field: function writeSFixed64Field(tag, val) {
            this.writeTag(tag, Pbf.Fixed64);
            this.writeSFixed64(val);
          },
          writeVarintField: function writeVarintField(tag, val) {
            this.writeTag(tag, Pbf.Varint);
            this.writeVarint(val);
          },
          writeSVarintField: function writeSVarintField(tag, val) {
            this.writeTag(tag, Pbf.Varint);
            this.writeSVarint(val);
          },
          writeStringField: function writeStringField(tag, str) {
            this.writeTag(tag, Pbf.Bytes);
            this.writeString(str);
          },
          writeFloatField: function writeFloatField(tag, val) {
            this.writeTag(tag, Pbf.Fixed32);
            this.writeFloat(val);
          },
          writeDoubleField: function writeDoubleField(tag, val) {
            this.writeTag(tag, Pbf.Fixed64);
            this.writeDouble(val);
          },
          writeBooleanField: function writeBooleanField(tag, val) {
            this.writeVarintField(tag, Boolean(val));
          }
        };

        function readVarintRemainder(l, s, p) {
          var buf = p.buf,
              h,
              b;
          b = buf[p.pos++];
          h = (b & 0x70) >> 4;
          if (b < 0x80) return toNum(l, h, s);
          b = buf[p.pos++];
          h |= (b & 0x7f) << 3;
          if (b < 0x80) return toNum(l, h, s);
          b = buf[p.pos++];
          h |= (b & 0x7f) << 10;
          if (b < 0x80) return toNum(l, h, s);
          b = buf[p.pos++];
          h |= (b & 0x7f) << 17;
          if (b < 0x80) return toNum(l, h, s);
          b = buf[p.pos++];
          h |= (b & 0x7f) << 24;
          if (b < 0x80) return toNum(l, h, s);
          b = buf[p.pos++];
          h |= (b & 0x01) << 31;
          if (b < 0x80) return toNum(l, h, s);
          throw new Error('Expected varint not more than 10 bytes');
        }

        function readPackedEnd(pbf) {
          return pbf.type === Pbf.Bytes ? pbf.readVarint() + pbf.pos : pbf.pos + 1;
        }

        function toNum(low, high, isSigned) {
          if (isSigned) {
            return high * 0x100000000 + (low >>> 0);
          }

          return (high >>> 0) * 0x100000000 + (low >>> 0);
        }

        function writeBigVarint(val, pbf) {
          var low, high;

          if (val >= 0) {
            low = val % 0x100000000 | 0;
            high = val / 0x100000000 | 0;
          } else {
            low = ~(-val % 0x100000000);
            high = ~(-val / 0x100000000);

            if (low ^ 0xffffffff) {
              low = low + 1 | 0;
            } else {
              low = 0;
              high = high + 1 | 0;
            }
          }

          if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
            throw new Error('Given varint doesn\'t fit into 10 bytes');
          }

          pbf.realloc(10);
          writeBigVarintLow(low, high, pbf);
          writeBigVarintHigh(high, pbf);
        }

        function writeBigVarintLow(low, high, pbf) {
          pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
          low >>>= 7;
          pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
          low >>>= 7;
          pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
          low >>>= 7;
          pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
          low >>>= 7;
          pbf.buf[pbf.pos] = low & 0x7f;
        }

        function writeBigVarintHigh(high, pbf) {
          var lsb = (high & 0x07) << 4;
          pbf.buf[pbf.pos++] |= lsb | ((high >>>= 3) ? 0x80 : 0);
          if (!high) return;
          pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
          if (!high) return;
          pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
          if (!high) return;
          pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
          if (!high) return;
          pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
          if (!high) return;
          pbf.buf[pbf.pos++] = high & 0x7f;
        }

        function makeRoomForExtraLength(startPos, len, pbf) {
          var extraLen = len <= 0x3fff ? 1 : len <= 0x1fffff ? 2 : len <= 0xfffffff ? 3 : Math.floor(Math.log(len) / (Math.LN2 * 7)); // if 1 byte isn't enough for encoding message length, shift the data to the right

          pbf.realloc(extraLen);

          for (var i = pbf.pos - 1; i >= startPos; i--) {
            pbf.buf[i + extraLen] = pbf.buf[i];
          }
        }

        function _writePackedVarint(arr, pbf) {
          for (var i = 0; i < arr.length; i++) {
            pbf.writeVarint(arr[i]);
          }
        }

        function _writePackedSVarint(arr, pbf) {
          for (var i = 0; i < arr.length; i++) {
            pbf.writeSVarint(arr[i]);
          }
        }

        function _writePackedFloat(arr, pbf) {
          for (var i = 0; i < arr.length; i++) {
            pbf.writeFloat(arr[i]);
          }
        }

        function _writePackedDouble(arr, pbf) {
          for (var i = 0; i < arr.length; i++) {
            pbf.writeDouble(arr[i]);
          }
        }

        function _writePackedBoolean(arr, pbf) {
          for (var i = 0; i < arr.length; i++) {
            pbf.writeBoolean(arr[i]);
          }
        }

        function _writePackedFixed(arr, pbf) {
          for (var i = 0; i < arr.length; i++) {
            pbf.writeFixed32(arr[i]);
          }
        }

        function _writePackedSFixed(arr, pbf) {
          for (var i = 0; i < arr.length; i++) {
            pbf.writeSFixed32(arr[i]);
          }
        }

        function _writePackedFixed2(arr, pbf) {
          for (var i = 0; i < arr.length; i++) {
            pbf.writeFixed64(arr[i]);
          }
        }

        function _writePackedSFixed2(arr, pbf) {
          for (var i = 0; i < arr.length; i++) {
            pbf.writeSFixed64(arr[i]);
          }
        } // Buffer code below from https://github.com/feross/buffer, MIT-licensed


        function readUInt32(buf, pos) {
          return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + buf[pos + 3] * 0x1000000;
        }

        function writeInt32(buf, val, pos) {
          buf[pos] = val;
          buf[pos + 1] = val >>> 8;
          buf[pos + 2] = val >>> 16;
          buf[pos + 3] = val >>> 24;
        }

        function readInt32(buf, pos) {
          return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + (buf[pos + 3] << 24);
        }

        function readUtf8(buf, pos, end) {
          var str = '';
          var i = pos;

          while (i < end) {
            var b0 = buf[i];
            var c = null; // codepoint

            var bytesPerSequence = b0 > 0xEF ? 4 : b0 > 0xDF ? 3 : b0 > 0xBF ? 2 : 1;
            if (i + bytesPerSequence > end) break;
            var b1, b2, b3;

            if (bytesPerSequence === 1) {
              if (b0 < 0x80) {
                c = b0;
              }
            } else if (bytesPerSequence === 2) {
              b1 = buf[i + 1];

              if ((b1 & 0xC0) === 0x80) {
                c = (b0 & 0x1F) << 0x6 | b1 & 0x3F;

                if (c <= 0x7F) {
                  c = null;
                }
              }
            } else if (bytesPerSequence === 3) {
              b1 = buf[i + 1];
              b2 = buf[i + 2];

              if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
                c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | b2 & 0x3F;

                if (c <= 0x7FF || c >= 0xD800 && c <= 0xDFFF) {
                  c = null;
                }
              }
            } else if (bytesPerSequence === 4) {
              b1 = buf[i + 1];
              b2 = buf[i + 2];
              b3 = buf[i + 3];

              if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
                c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | b3 & 0x3F;

                if (c <= 0xFFFF || c >= 0x110000) {
                  c = null;
                }
              }
            }

            if (c === null) {
              c = 0xFFFD;
              bytesPerSequence = 1;
            } else if (c > 0xFFFF) {
              c -= 0x10000;
              str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
              c = 0xDC00 | c & 0x3FF;
            }

            str += String.fromCharCode(c);
            i += bytesPerSequence;
          }

          return str;
        }

        function readUtf8TextDecoder(buf, pos, end) {
          return utf8TextDecoder.decode(buf.subarray(pos, end));
        }

        function writeUtf8(buf, str, pos) {
          for (var i = 0, c, lead; i < str.length; i++) {
            c = str.charCodeAt(i); // code point

            if (c > 0xD7FF && c < 0xE000) {
              if (lead) {
                if (c < 0xDC00) {
                  buf[pos++] = 0xEF;
                  buf[pos++] = 0xBF;
                  buf[pos++] = 0xBD;
                  lead = c;
                  continue;
                } else {
                  c = lead - 0xD800 << 10 | c - 0xDC00 | 0x10000;
                  lead = null;
                }
              } else {
                if (c > 0xDBFF || i + 1 === str.length) {
                  buf[pos++] = 0xEF;
                  buf[pos++] = 0xBF;
                  buf[pos++] = 0xBD;
                } else {
                  lead = c;
                }

                continue;
              }
            } else if (lead) {
              buf[pos++] = 0xEF;
              buf[pos++] = 0xBF;
              buf[pos++] = 0xBD;
              lead = null;
            }

            if (c < 0x80) {
              buf[pos++] = c;
            } else {
              if (c < 0x800) {
                buf[pos++] = c >> 0x6 | 0xC0;
              } else {
                if (c < 0x10000) {
                  buf[pos++] = c >> 0xC | 0xE0;
                } else {
                  buf[pos++] = c >> 0x12 | 0xF0;
                  buf[pos++] = c >> 0xC & 0x3F | 0x80;
                }

                buf[pos++] = c >> 0x6 & 0x3F | 0x80;
              }

              buf[pos++] = c & 0x3F | 0x80;
            }
          }

          return pos;
        }

        var pointGeometry = Point;
        /**
         * A standalone point geometry with useful accessor, comparison, and
         * modification methods.
         *
         * @class Point
         * @param {Number} x the x-coordinate. this could be longitude or screen
         * pixels, or any other sort of unit.
         * @param {Number} y the y-coordinate. this could be latitude or screen
         * pixels, or any other sort of unit.
         * @example
         * var point = new Point(-77, 38);
         */

        function Point(x, y) {
          this.x = x;
          this.y = y;
        }

        Point.prototype = {
          /**
           * Clone this point, returning a new point that can be modified
           * without affecting the old one.
           * @return {Point} the clone
           */
          clone: function clone() {
            return new Point(this.x, this.y);
          },

          /**
           * Add this point's x & y coordinates to another point,
           * yielding a new point.
           * @param {Point} p the other point
           * @return {Point} output point
           */
          add: function add(p) {
            return this.clone()._add(p);
          },

          /**
           * Subtract this point's x & y coordinates to from point,
           * yielding a new point.
           * @param {Point} p the other point
           * @return {Point} output point
           */
          sub: function sub(p) {
            return this.clone()._sub(p);
          },

          /**
           * Multiply this point's x & y coordinates by point,
           * yielding a new point.
           * @param {Point} p the other point
           * @return {Point} output point
           */
          multByPoint: function multByPoint(p) {
            return this.clone()._multByPoint(p);
          },

          /**
           * Divide this point's x & y coordinates by point,
           * yielding a new point.
           * @param {Point} p the other point
           * @return {Point} output point
           */
          divByPoint: function divByPoint(p) {
            return this.clone()._divByPoint(p);
          },

          /**
           * Multiply this point's x & y coordinates by a factor,
           * yielding a new point.
           * @param {Point} k factor
           * @return {Point} output point
           */
          mult: function mult(k) {
            return this.clone()._mult(k);
          },

          /**
           * Divide this point's x & y coordinates by a factor,
           * yielding a new point.
           * @param {Point} k factor
           * @return {Point} output point
           */
          div: function div(k) {
            return this.clone()._div(k);
          },

          /**
           * Rotate this point around the 0, 0 origin by an angle a,
           * given in radians
           * @param {Number} a angle to rotate around, in radians
           * @return {Point} output point
           */
          rotate: function rotate(a) {
            return this.clone()._rotate(a);
          },

          /**
           * Rotate this point around p point by an angle a,
           * given in radians
           * @param {Number} a angle to rotate around, in radians
           * @param {Point} p Point to rotate around
           * @return {Point} output point
           */
          rotateAround: function rotateAround(a, p) {
            return this.clone()._rotateAround(a, p);
          },

          /**
           * Multiply this point by a 4x1 transformation matrix
           * @param {Array<Number>} m transformation matrix
           * @return {Point} output point
           */
          matMult: function matMult(m) {
            return this.clone()._matMult(m);
          },

          /**
           * Calculate this point but as a unit vector from 0, 0, meaning
           * that the distance from the resulting point to the 0, 0
           * coordinate will be equal to 1 and the angle from the resulting
           * point to the 0, 0 coordinate will be the same as before.
           * @return {Point} unit vector point
           */
          unit: function unit() {
            return this.clone()._unit();
          },

          /**
           * Compute a perpendicular point, where the new y coordinate
           * is the old x coordinate and the new x coordinate is the old y
           * coordinate multiplied by -1
           * @return {Point} perpendicular point
           */
          perp: function perp() {
            return this.clone()._perp();
          },

          /**
           * Return a version of this point with the x & y coordinates
           * rounded to integers.
           * @return {Point} rounded point
           */
          round: function round() {
            return this.clone()._round();
          },

          /**
           * Return the magitude of this point: this is the Euclidean
           * distance from the 0, 0 coordinate to this point's x and y
           * coordinates.
           * @return {Number} magnitude
           */
          mag: function mag() {
            return Math.sqrt(this.x * this.x + this.y * this.y);
          },

          /**
           * Judge whether this point is equal to another point, returning
           * true or false.
           * @param {Point} other the other point
           * @return {boolean} whether the points are equal
           */
          equals: function equals(other) {
            return this.x === other.x && this.y === other.y;
          },

          /**
           * Calculate the distance from this point to another point
           * @param {Point} p the other point
           * @return {Number} distance
           */
          dist: function dist(p) {
            return Math.sqrt(this.distSqr(p));
          },

          /**
           * Calculate the distance from this point to another point,
           * without the square root step. Useful if you're comparing
           * relative distances.
           * @param {Point} p the other point
           * @return {Number} distance
           */
          distSqr: function distSqr(p) {
            var dx = p.x - this.x,
                dy = p.y - this.y;
            return dx * dx + dy * dy;
          },

          /**
           * Get the angle from the 0, 0 coordinate to this point, in radians
           * coordinates.
           * @return {Number} angle
           */
          angle: function angle() {
            return Math.atan2(this.y, this.x);
          },

          /**
           * Get the angle from this point to another point, in radians
           * @param {Point} b the other point
           * @return {Number} angle
           */
          angleTo: function angleTo(b) {
            return Math.atan2(this.y - b.y, this.x - b.x);
          },

          /**
           * Get the angle between this point and another point, in radians
           * @param {Point} b the other point
           * @return {Number} angle
           */
          angleWith: function angleWith(b) {
            return this.angleWithSep(b.x, b.y);
          },

          /*
           * Find the angle of the two vectors, solving the formula for
           * the cross product a x b = |a||b|sin(θ) for θ.
           * @param {Number} x the x-coordinate
           * @param {Number} y the y-coordinate
           * @return {Number} the angle in radians
           */
          angleWithSep: function angleWithSep(x, y) {
            return Math.atan2(this.x * y - this.y * x, this.x * x + this.y * y);
          },
          _matMult: function _matMult(m) {
            var x = m[0] * this.x + m[1] * this.y,
                y = m[2] * this.x + m[3] * this.y;
            this.x = x;
            this.y = y;
            return this;
          },
          _add: function _add(p) {
            this.x += p.x;
            this.y += p.y;
            return this;
          },
          _sub: function _sub(p) {
            this.x -= p.x;
            this.y -= p.y;
            return this;
          },
          _mult: function _mult(k) {
            this.x *= k;
            this.y *= k;
            return this;
          },
          _div: function _div(k) {
            this.x /= k;
            this.y /= k;
            return this;
          },
          _multByPoint: function _multByPoint(p) {
            this.x *= p.x;
            this.y *= p.y;
            return this;
          },
          _divByPoint: function _divByPoint(p) {
            this.x /= p.x;
            this.y /= p.y;
            return this;
          },
          _unit: function _unit() {
            this._div(this.mag());

            return this;
          },
          _perp: function _perp() {
            var y = this.y;
            this.y = this.x;
            this.x = -y;
            return this;
          },
          _rotate: function _rotate(angle) {
            var cos = Math.cos(angle),
                sin = Math.sin(angle),
                x = cos * this.x - sin * this.y,
                y = sin * this.x + cos * this.y;
            this.x = x;
            this.y = y;
            return this;
          },
          _rotateAround: function _rotateAround(angle, p) {
            var cos = Math.cos(angle),
                sin = Math.sin(angle),
                x = p.x + cos * (this.x - p.x) - sin * (this.y - p.y),
                y = p.y + sin * (this.x - p.x) + cos * (this.y - p.y);
            this.x = x;
            this.y = y;
            return this;
          },
          _round: function _round() {
            this.x = Math.round(this.x);
            this.y = Math.round(this.y);
            return this;
          }
        };
        /**
         * Construct a point from an array if necessary, otherwise if the input
         * is already a Point, or an unknown type, return it unchanged
         * @param {Array<Number>|Point|*} a any kind of input value
         * @return {Point} constructed point, or passed-through value.
         * @example
         * // this
         * var point = Point.convert([0, 1]);
         * // is equivalent to
         * var point = new Point(0, 1);
         */

        Point.convert = function (a) {
          if (a instanceof Point) {
            return a;
          }

          if (Array.isArray(a)) {
            return new Point(a[0], a[1]);
          }

          return a;
        };

        var vectortilefeature = VectorTileFeature$1;

        function VectorTileFeature$1(pbf, end, extent, keys, values) {
          // Public
          this.properties = {};
          this.extent = extent;
          this.type = 0; // Private

          this._pbf = pbf;
          this._geometry = -1;
          this._keys = keys;
          this._values = values;
          pbf.readFields(readFeature, this, end);
        }

        function readFeature(tag, feature, pbf) {
          if (tag == 1) feature.id = pbf.readVarint();else if (tag == 2) readTag(pbf, feature);else if (tag == 3) feature.type = pbf.readVarint();else if (tag == 4) feature._geometry = pbf.pos;
        }

        function readTag(pbf, feature) {
          var end = pbf.readVarint() + pbf.pos;

          while (pbf.pos < end) {
            var key = feature._keys[pbf.readVarint()],
                value = feature._values[pbf.readVarint()];

            feature.properties[key] = value;
          }
        }

        VectorTileFeature$1.types = ['Unknown', 'Point', 'LineString', 'Polygon'];

        VectorTileFeature$1.prototype.loadGeometry = function () {
          var pbf = this._pbf;
          pbf.pos = this._geometry;
          var end = pbf.readVarint() + pbf.pos,
              cmd = 1,
              length = 0,
              x = 0,
              y = 0,
              lines = [],
              line;

          while (pbf.pos < end) {
            if (length <= 0) {
              var cmdLen = pbf.readVarint();
              cmd = cmdLen & 0x7;
              length = cmdLen >> 3;
            }

            length--;

            if (cmd === 1 || cmd === 2) {
              x += pbf.readSVarint();
              y += pbf.readSVarint();

              if (cmd === 1) {
                // moveTo
                if (line) lines.push(line);
                line = [];
              }

              line.push(new pointGeometry(x, y));
            } else if (cmd === 7) {
              // Workaround for https://github.com/mapbox/mapnik-vector-tile/issues/90
              if (line) {
                line.push(line[0].clone()); // closePolygon
              }
            } else {
              throw new Error('unknown command ' + cmd);
            }
          }

          if (line) lines.push(line);
          return lines;
        };

        VectorTileFeature$1.prototype.bbox = function () {
          var pbf = this._pbf;
          pbf.pos = this._geometry;
          var end = pbf.readVarint() + pbf.pos,
              cmd = 1,
              length = 0,
              x = 0,
              y = 0,
              x1 = Infinity,
              x2 = -Infinity,
              y1 = Infinity,
              y2 = -Infinity;

          while (pbf.pos < end) {
            if (length <= 0) {
              var cmdLen = pbf.readVarint();
              cmd = cmdLen & 0x7;
              length = cmdLen >> 3;
            }

            length--;

            if (cmd === 1 || cmd === 2) {
              x += pbf.readSVarint();
              y += pbf.readSVarint();
              if (x < x1) x1 = x;
              if (x > x2) x2 = x;
              if (y < y1) y1 = y;
              if (y > y2) y2 = y;
            } else if (cmd !== 7) {
              throw new Error('unknown command ' + cmd);
            }
          }

          return [x1, y1, x2, y2];
        };

        VectorTileFeature$1.prototype.toGeoJSON = function (x, y, z) {
          var size = this.extent * Math.pow(2, z),
              x0 = this.extent * x,
              y0 = this.extent * y,
              coords = this.loadGeometry(),
              type = VectorTileFeature$1.types[this.type],
              i,
              j;

          function project(line) {
            for (var j = 0; j < line.length; j++) {
              var p = line[j],
                  y2 = 180 - (p.y + y0) * 360 / size;
              line[j] = [(p.x + x0) * 360 / size - 180, 360 / Math.PI * Math.atan(Math.exp(y2 * Math.PI / 180)) - 90];
            }
          }

          switch (this.type) {
            case 1:
              var points = [];

              for (i = 0; i < coords.length; i++) {
                points[i] = coords[i][0];
              }

              coords = points;
              project(coords);
              break;

            case 2:
              for (i = 0; i < coords.length; i++) {
                project(coords[i]);
              }

              break;

            case 3:
              coords = classifyRings(coords);

              for (i = 0; i < coords.length; i++) {
                for (j = 0; j < coords[i].length; j++) {
                  project(coords[i][j]);
                }
              }

              break;
          }

          if (coords.length === 1) {
            coords = coords[0];
          } else {
            type = 'Multi' + type;
          }

          var result = {
            type: "Feature",
            geometry: {
              type: type,
              coordinates: coords
            },
            properties: this.properties
          };

          if ('id' in this) {
            result.id = this.id;
          }

          return result;
        }; // classifies an array of rings into polygons with outer rings and holes


        function classifyRings(rings) {
          var len = rings.length;
          if (len <= 1) return [rings];
          var polygons = [],
              polygon,
              ccw;

          for (var i = 0; i < len; i++) {
            var area = signedArea(rings[i]);
            if (area === 0) continue;
            if (ccw === undefined) ccw = area < 0;

            if (ccw === area < 0) {
              if (polygon) polygons.push(polygon);
              polygon = [rings[i]];
            } else {
              polygon.push(rings[i]);
            }
          }

          if (polygon) polygons.push(polygon);
          return polygons;
        }

        function signedArea(ring) {
          var sum = 0;

          for (var i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {
            p1 = ring[i];
            p2 = ring[j];
            sum += (p2.x - p1.x) * (p1.y + p2.y);
          }

          return sum;
        }

        var vectortilelayer = VectorTileLayer$1;

        function VectorTileLayer$1(pbf, end) {
          // Public
          this.version = 1;
          this.name = null;
          this.extent = 4096;
          this.length = 0; // Private

          this._pbf = pbf;
          this._keys = [];
          this._values = [];
          this._features = [];
          pbf.readFields(readLayer, this, end);
          this.length = this._features.length;
        }

        function readLayer(tag, layer, pbf) {
          if (tag === 15) layer.version = pbf.readVarint();else if (tag === 1) layer.name = pbf.readString();else if (tag === 5) layer.extent = pbf.readVarint();else if (tag === 2) layer._features.push(pbf.pos);else if (tag === 3) layer._keys.push(pbf.readString());else if (tag === 4) layer._values.push(readValueMessage(pbf));
        }

        function readValueMessage(pbf) {
          var value = null,
              end = pbf.readVarint() + pbf.pos;

          while (pbf.pos < end) {
            var tag = pbf.readVarint() >> 3;
            value = tag === 1 ? pbf.readString() : tag === 2 ? pbf.readFloat() : tag === 3 ? pbf.readDouble() : tag === 4 ? pbf.readVarint64() : tag === 5 ? pbf.readVarint() : tag === 6 ? pbf.readSVarint() : tag === 7 ? pbf.readBoolean() : null;
          }

          return value;
        } // return feature `i` from this layer as a `VectorTileFeature`


        VectorTileLayer$1.prototype.feature = function (i) {
          if (i < 0 || i >= this._features.length) throw new Error('feature index out of bounds');
          this._pbf.pos = this._features[i];

          var end = this._pbf.readVarint() + this._pbf.pos;

          return new vectortilefeature(this._pbf, end, this.extent, this._keys, this._values);
        };

        var vectortile = VectorTile$1;

        function VectorTile$1(pbf, end) {
          this.layers = pbf.readFields(readTile, {}, end);
        }

        function readTile(tag, layers, pbf) {
          if (tag === 3) {
            var layer = new vectortilelayer(pbf, pbf.readVarint() + pbf.pos);
            if (layer.length) layers[layer.name] = layer;
          }
        }

        var VectorTile = vectortile;
        var VectorTileFeature = vectortilefeature;
        var VectorTileLayer = vectortilelayer;
        var vectorTile = {
          VectorTile: VectorTile,
          VectorTileFeature: VectorTileFeature,
          VectorTileLayer: VectorTileLayer
        };

        var accessToken = 'MLY|4100327730013843|5bb78b81720791946a9a7b956c57b7cf';
        var apiUrl = 'https://graph.mapillary.com/';
        var baseTileUrl = 'https://tiles.mapillary.com/maps/vtp';
        var mapFeatureTileUrl = "".concat(baseTileUrl, "/mly_map_feature_point/2/{z}/{x}/{y}?access_token=").concat(accessToken);
        var tileUrl = "".concat(baseTileUrl, "/mly1_public/2/{z}/{x}/{y}?access_token=").concat(accessToken);
        var trafficSignTileUrl = "".concat(baseTileUrl, "/mly_map_feature_traffic_sign/2/{z}/{x}/{y}?access_token=").concat(accessToken);
        var viewercss = 'mapillary-js/mapillary.css';
        var viewerjs = 'mapillary-js/mapillary.js';
        var minZoom$1 = 14;
        var dispatch$4 = dispatch$8('change', 'loadedImages', 'loadedSigns', 'loadedMapFeatures', 'bearingChanged', 'imageChanged');

        var _loadViewerPromise$2;

        var _mlyActiveImage;

        var _mlyCache;

        var _mlyFallback = false;

        var _mlyHighlightedDetection;

        var _mlyShowFeatureDetections = false;
        var _mlyShowSignDetections = false;

        var _mlyViewer;

        var _mlyViewerFilter = ['all']; // Load all data for the specified type from Mapillary vector tiles

        function loadTiles$2(which, url, maxZoom, projection) {
          var tiler = utilTiler().zoomExtent([minZoom$1, maxZoom]).skipNullIsland(true);
          var tiles = tiler.getTiles(projection);
          tiles.forEach(function (tile) {
            loadTile$1(which, url, tile);
          });
        } // Load all data for the specified type from one vector tile


        function loadTile$1(which, url, tile) {
          var cache = _mlyCache.requests;
          var tileId = "".concat(tile.id, "-").concat(which);
          if (cache.loaded[tileId] || cache.inflight[tileId]) return;
          var controller = new AbortController();
          cache.inflight[tileId] = controller;
          var requestUrl = url.replace('{x}', tile.xyz[0]).replace('{y}', tile.xyz[1]).replace('{z}', tile.xyz[2]);
          fetch(requestUrl, {
            signal: controller.signal
          }).then(function (response) {
            if (!response.ok) {
              throw new Error(response.status + ' ' + response.statusText);
            }

            cache.loaded[tileId] = true;
            delete cache.inflight[tileId];
            return response.arrayBuffer();
          }).then(function (data) {
            if (!data) {
              throw new Error('No Data');
            }

            loadTileDataToCache(data, tile, which);

            if (which === 'images') {
              dispatch$4.call('loadedImages');
            } else if (which === 'signs') {
              dispatch$4.call('loadedSigns');
            } else if (which === 'points') {
              dispatch$4.call('loadedMapFeatures');
            }
          })["catch"](function () {
            cache.loaded[tileId] = true;
            delete cache.inflight[tileId];
          });
        } // Load the data from the vector tile into cache


        function loadTileDataToCache(data, tile, which) {
          var vectorTile = new VectorTile(new pbf(data));
          var features, cache, layer, i, feature, loc, d;

          if (vectorTile.layers.hasOwnProperty('image')) {
            features = [];
            cache = _mlyCache.images;
            layer = vectorTile.layers.image;

            for (i = 0; i < layer.length; i++) {
              feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
              loc = feature.geometry.coordinates;
              d = {
                loc: loc,
                captured_at: feature.properties.captured_at,
                ca: feature.properties.compass_angle,
                id: feature.properties.id,
                is_pano: feature.properties.is_pano,
                sequence_id: feature.properties.sequence_id
              };
              cache.forImageId[d.id] = d;
              features.push({
                minX: loc[0],
                minY: loc[1],
                maxX: loc[0],
                maxY: loc[1],
                data: d
              });
            }

            if (cache.rtree) {
              cache.rtree.load(features);
            }
          }

          if (vectorTile.layers.hasOwnProperty('sequence')) {
            features = [];
            cache = _mlyCache.sequences;
            layer = vectorTile.layers.sequence;

            for (i = 0; i < layer.length; i++) {
              feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);

              if (cache.lineString[feature.properties.id]) {
                cache.lineString[feature.properties.id].push(feature);
              } else {
                cache.lineString[feature.properties.id] = [feature];
              }
            }
          }

          if (vectorTile.layers.hasOwnProperty('point')) {
            features = [];
            cache = _mlyCache[which];
            layer = vectorTile.layers.point;

            for (i = 0; i < layer.length; i++) {
              feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
              loc = feature.geometry.coordinates;
              d = {
                loc: loc,
                id: feature.properties.id,
                first_seen_at: feature.properties.first_seen_at,
                last_seen_at: feature.properties.last_seen_at,
                value: feature.properties.value
              };
              features.push({
                minX: loc[0],
                minY: loc[1],
                maxX: loc[0],
                maxY: loc[1],
                data: d
              });
            }

            if (cache.rtree) {
              cache.rtree.load(features);
            }
          }

          if (vectorTile.layers.hasOwnProperty('traffic_sign')) {
            features = [];
            cache = _mlyCache[which];
            layer = vectorTile.layers.traffic_sign;

            for (i = 0; i < layer.length; i++) {
              feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
              loc = feature.geometry.coordinates;
              d = {
                loc: loc,
                id: feature.properties.id,
                first_seen_at: feature.properties.first_seen_at,
                last_seen_at: feature.properties.last_seen_at,
                value: feature.properties.value
              };
              features.push({
                minX: loc[0],
                minY: loc[1],
                maxX: loc[0],
                maxY: loc[1],
                data: d
              });
            }

            if (cache.rtree) {
              cache.rtree.load(features);
            }
          }
        } // Get data from the API


        function loadData(url) {
          return fetch(url).then(function (response) {
            if (!response.ok) {
              throw new Error(response.status + ' ' + response.statusText);
            }

            return response.json();
          }).then(function (result) {
            if (!result) {
              return [];
            }

            return result.data || [];
          });
        } // Partition viewport into higher zoom tiles


        function partitionViewport$2(projection) {
          var z = geoScaleToZoom(projection.scale());
          var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5

          var tiler = utilTiler().zoomExtent([z2, z2]);
          return tiler.getTiles(projection).map(function (tile) {
            return tile.extent;
          });
        } // Return no more than `limit` results per partition.


        function searchLimited$2(limit, projection, rtree) {
          limit = limit || 5;
          return partitionViewport$2(projection).reduce(function (result, extent) {
            var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
              return d.data;
            });
            return found.length ? result.concat(found) : result;
          }, []);
        }

        var serviceMapillary = {
          // Initialize Mapillary
          init: function init() {
            if (!_mlyCache) {
              this.reset();
            }

            this.event = utilRebind(this, dispatch$4, 'on');
          },
          // Reset cache and state
          reset: function reset() {
            if (_mlyCache) {
              Object.values(_mlyCache.requests.inflight).forEach(function (request) {
                request.abort();
              });
            }

            _mlyCache = {
              images: {
                rtree: new RBush(),
                forImageId: {}
              },
              image_detections: {
                forImageId: {}
              },
              signs: {
                rtree: new RBush()
              },
              points: {
                rtree: new RBush()
              },
              sequences: {
                rtree: new RBush(),
                lineString: {}
              },
              requests: {
                loaded: {},
                inflight: {}
              }
            };
            _mlyActiveImage = null;
          },
          // Get visible images
          images: function images(projection) {
            var limit = 5;
            return searchLimited$2(limit, projection, _mlyCache.images.rtree);
          },
          // Get visible traffic signs
          signs: function signs(projection) {
            var limit = 5;
            return searchLimited$2(limit, projection, _mlyCache.signs.rtree);
          },
          // Get visible map (point) features
          mapFeatures: function mapFeatures(projection) {
            var limit = 5;
            return searchLimited$2(limit, projection, _mlyCache.points.rtree);
          },
          // Get cached image by id
          cachedImage: function cachedImage(imageId) {
            return _mlyCache.images.forImageId[imageId];
          },
          // Get visible sequences
          sequences: function sequences(projection) {
            var viewport = projection.clipExtent();
            var min = [viewport[0][0], viewport[1][1]];
            var max = [viewport[1][0], viewport[0][1]];
            var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
            var sequenceIds = {};
            var lineStrings = [];

            _mlyCache.images.rtree.search(bbox).forEach(function (d) {
              if (d.data.sequence_id) {
                sequenceIds[d.data.sequence_id] = true;
              }
            });

            Object.keys(sequenceIds).forEach(function (sequenceId) {
              if (_mlyCache.sequences.lineString[sequenceId]) {
                lineStrings = lineStrings.concat(_mlyCache.sequences.lineString[sequenceId]);
              }
            });
            return lineStrings;
          },
          // Load images in the visible area
          loadImages: function loadImages(projection) {
            loadTiles$2('images', tileUrl, 14, projection);
          },
          // Load traffic signs in the visible area
          loadSigns: function loadSigns(projection) {
            loadTiles$2('signs', trafficSignTileUrl, 14, projection);
          },
          // Load map (point) features in the visible area
          loadMapFeatures: function loadMapFeatures(projection) {
            loadTiles$2('points', mapFeatureTileUrl, 14, projection);
          },
          // Return a promise that resolves when the image viewer (Mapillary JS) library has finished loading
          ensureViewerLoaded: function ensureViewerLoaded(context) {
            if (_loadViewerPromise$2) return _loadViewerPromise$2; // add mly-wrapper

            var wrap = context.container().select('.photoviewer').selectAll('.mly-wrapper').data([0]);
            wrap.enter().append('div').attr('id', 'ideditor-mly').attr('class', 'photo-wrapper mly-wrapper').classed('hide', true);
            var that = this;
            _loadViewerPromise$2 = new Promise(function (resolve, reject) {
              var loadedCount = 0;

              function loaded() {
                loadedCount += 1; // wait until both files are loaded

                if (loadedCount === 2) resolve();
              }

              var head = select('head'); // load mapillary-viewercss

              head.selectAll('#ideditor-mapillary-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-mapillary-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(viewercss)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
                reject();
              }); // load mapillary-viewerjs

              head.selectAll('#ideditor-mapillary-viewerjs').data([0]).enter().append('script').attr('id', 'ideditor-mapillary-viewerjs').attr('crossorigin', 'anonymous').attr('src', context.asset(viewerjs)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
                reject();
              });
            })["catch"](function () {
              _loadViewerPromise$2 = null;
            }).then(function () {
              that.initViewer(context);
            });
            return _loadViewerPromise$2;
          },
          // Load traffic sign image sprites
          loadSignResources: function loadSignResources(context) {
            context.ui().svgDefs.addSprites(['mapillary-sprite'], false
            /* don't override colors */
            );
            return this;
          },
          // Load map (point) feature image sprites
          loadObjectResources: function loadObjectResources(context) {
            context.ui().svgDefs.addSprites(['mapillary-object-sprite'], false
            /* don't override colors */
            );
            return this;
          },
          // Remove previous detections in image viewer
          resetTags: function resetTags() {
            if (_mlyViewer && !_mlyFallback) {
              _mlyViewer.getComponent('tag').removeAll();
            }
          },
          // Show map feature detections in image viewer
          showFeatureDetections: function showFeatureDetections(value) {
            _mlyShowFeatureDetections = value;

            if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
              this.resetTags();
            }
          },
          // Show traffic sign detections in image viewer
          showSignDetections: function showSignDetections(value) {
            _mlyShowSignDetections = value;

            if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
              this.resetTags();
            }
          },
          // Apply filter to image viewer
          filterViewer: function filterViewer(context) {
            var showsPano = context.photos().showsPanoramic();
            var showsFlat = context.photos().showsFlat();
            var fromDate = context.photos().fromDate();
            var toDate = context.photos().toDate();
            var filter = ['all'];
            if (!showsPano) filter.push(['!=', 'cameraType', 'spherical']);
            if (!showsFlat && showsPano) filter.push(['==', 'pano', true]);

            if (fromDate) {
              filter.push(['>=', 'capturedAt', new Date(fromDate).getTime()]);
            }

            if (toDate) {
              filter.push(['>=', 'capturedAt', new Date(toDate).getTime()]);
            }

            if (_mlyViewer) {
              _mlyViewer.setFilter(filter);
            }

            _mlyViewerFilter = filter;
            return filter;
          },
          // Make the image viewer visible
          showViewer: function showViewer(context) {
            var wrap = context.container().select('.photoviewer').classed('hide', false);
            var isHidden = wrap.selectAll('.photo-wrapper.mly-wrapper.hide').size();

            if (isHidden && _mlyViewer) {
              wrap.selectAll('.photo-wrapper:not(.mly-wrapper)').classed('hide', true);
              wrap.selectAll('.photo-wrapper.mly-wrapper').classed('hide', false);

              _mlyViewer.resize();
            }

            return this;
          },
          // Hide the image viewer and resets map markers
          hideViewer: function hideViewer(context) {
            _mlyActiveImage = null;

            if (!_mlyFallback && _mlyViewer) {
              _mlyViewer.getComponent('sequence').stop();
            }

            var viewer = context.container().select('.photoviewer');
            if (!viewer.empty()) viewer.datum(null);
            viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
            this.updateUrlImage(null);
            dispatch$4.call('imageChanged');
            dispatch$4.call('loadedMapFeatures');
            dispatch$4.call('loadedSigns');
            return this.setStyles(context, null);
          },
          // Update the URL with current image id
          updateUrlImage: function updateUrlImage(imageId) {
            if (!window.mocha) {
              var hash = utilStringQs(window.location.hash);

              if (imageId) {
                hash.photo = 'mapillary/' + imageId;
              } else {
                delete hash.photo;
              }

              window.location.replace('#' + utilQsString(hash, true));
            }
          },
          // Highlight the detection in the viewer that is related to the clicked map feature
          highlightDetection: function highlightDetection(detection) {
            if (detection) {
              _mlyHighlightedDetection = detection.id;
            }

            return this;
          },
          // Initialize image viewer (Mapillar JS)
          initViewer: function initViewer(context) {
            var that = this;
            if (!window.mapillary) return;
            var opts = {
              accessToken: accessToken,
              component: {
                cover: false,
                keyboard: false,
                tag: true
              },
              container: 'ideditor-mly'
            }; // Disable components requiring WebGL support

            if (!mapillary.isSupported() && mapillary.isFallbackSupported()) {
              _mlyFallback = true;
              opts.component = {
                cover: false,
                direction: false,
                imagePlane: false,
                keyboard: false,
                mouse: false,
                sequence: false,
                tag: false,
                image: true,
                // fallback
                navigation: true // fallback

              };
            }

            _mlyViewer = new mapillary.Viewer(opts);

            _mlyViewer.on('image', imageChanged);

            _mlyViewer.on('bearing', bearingChanged);

            if (_mlyViewerFilter) {
              _mlyViewer.setFilter(_mlyViewerFilter);
            } // Register viewer resize handler


            context.ui().photoviewer.on('resize.mapillary', function () {
              if (_mlyViewer) _mlyViewer.resize();
            }); // imageChanged: called after the viewer has changed images and is ready.

            function imageChanged(node) {
              that.resetTags();
              var image = node.image;
              that.setActiveImage(image);
              that.setStyles(context, null);
              var loc = [image.originalLngLat.lng, image.originalLngLat.lat];
              context.map().centerEase(loc);
              that.updateUrlImage(image.id);

              if (_mlyShowFeatureDetections || _mlyShowSignDetections) {
                that.updateDetections(image.id, "".concat(apiUrl, "/").concat(image.id, "/detections?access_token=").concat(accessToken, "&fields=id,image,geometry,value"));
              }

              dispatch$4.call('imageChanged');
            } // bearingChanged: called when the bearing changes in the image viewer.


            function bearingChanged(e) {
              dispatch$4.call('bearingChanged', undefined, e);
            }
          },
          // Move to an image
          selectImage: function selectImage(context, imageId) {
            if (_mlyViewer && imageId) {
              _mlyViewer.moveTo(imageId)["catch"](function (e) {
                console.error('mly3', e); // eslint-disable-line no-console
              });
            }

            return this;
          },
          // Return the currently displayed image
          getActiveImage: function getActiveImage() {
            return _mlyActiveImage;
          },
          // Return a list of detection objects for the given id
          getDetections: function getDetections(id) {
            return loadData("".concat(apiUrl, "/").concat(id, "/detections?access_token=").concat(accessToken, "&fields=id,value,image"));
          },
          // Set the currently visible image
          setActiveImage: function setActiveImage(image) {
            if (image) {
              _mlyActiveImage = {
                ca: image.originalCompassAngle,
                id: image.id,
                loc: [image.originalLngLat.lng, image.originalLngLat.lat],
                is_pano: image.cameraType === 'spherical',
                sequence_id: image.sequenceId
              };
            } else {
              _mlyActiveImage = null;
            }
          },
          // Update the currently highlighted sequence and selected bubble.
          setStyles: function setStyles(context, hovered) {
            var hoveredImageId = hovered && hovered.id;
            var hoveredSequenceId = hovered && hovered.sequence_id;
            var selectedSequenceId = _mlyActiveImage && _mlyActiveImage.sequence_id;
            context.container().selectAll('.layer-mapillary .viewfield-group').classed('highlighted', function (d) {
              return d.sequence_id === selectedSequenceId || d.id === hoveredImageId;
            }).classed('hovered', function (d) {
              return d.id === hoveredImageId;
            });
            context.container().selectAll('.layer-mapillary .sequence').classed('highlighted', function (d) {
              return d.properties.id === hoveredSequenceId;
            }).classed('currentView', function (d) {
              return d.properties.id === selectedSequenceId;
            });
            return this;
          },
          // Get detections for the current image and shows them in the image viewer
          updateDetections: function updateDetections(imageId, url) {
            if (!_mlyViewer || _mlyFallback) return;
            if (!imageId) return;
            var cache = _mlyCache.image_detections;

            if (cache.forImageId[imageId]) {
              showDetections(_mlyCache.image_detections.forImageId[imageId]);
            } else {
              loadData(url).then(function (detections) {
                detections.forEach(function (detection) {
                  if (!cache.forImageId[imageId]) {
                    cache.forImageId[imageId] = [];
                  }

                  cache.forImageId[imageId].push({
                    geometry: detection.geometry,
                    id: detection.id,
                    image_id: imageId,
                    value: detection.value
                  });
                });
                showDetections(_mlyCache.image_detections.forImageId[imageId] || []);
              });
            } // Create a tag for each detection and shows it in the image viewer


            function showDetections(detections) {
              var tagComponent = _mlyViewer.getComponent('tag');

              detections.forEach(function (data) {
                var tag = makeTag(data);

                if (tag) {
                  tagComponent.add([tag]);
                }
              });
            } // Create a Mapillary JS tag object


            function makeTag(data) {
              var valueParts = data.value.split('--');
              if (!valueParts.length) return;
              var tag;
              var text;
              var color = 0xffffff;

              if (_mlyHighlightedDetection === data.id) {
                color = 0xffff00;
                text = valueParts[1];

                if (text === 'flat' || text === 'discrete' || text === 'sign') {
                  text = valueParts[2];
                }

                text = text.replace(/-/g, ' ');
                text = text.charAt(0).toUpperCase() + text.slice(1);
                _mlyHighlightedDetection = null;
              }

              var decodedGeometry = window.atob(data.geometry);
              var uintArray = new Uint8Array(decodedGeometry.length);

              for (var i = 0; i < decodedGeometry.length; i++) {
                uintArray[i] = decodedGeometry.charCodeAt(i);
              }

              var tile = new VectorTile(new pbf(uintArray.buffer));
              var layer = tile.layers['mpy-or'];
              var geometries = layer.feature(0).loadGeometry();
              var polygon = geometries.map(function (ring) {
                return ring.map(function (point) {
                  return [point.x / layer.extent, point.y / layer.extent];
                });
              });
              tag = new mapillary.OutlineTag(data.id, new mapillary.PolygonGeometry(polygon[0]), {
                text: text,
                textColor: color,
                lineColor: color,
                lineWidth: 2,
                fillColor: color,
                fillOpacity: 0.3
              });
              return tag;
            }
          },
          // Return the current cache
          cache: function cache() {
            return _mlyCache;
          }
        };

        function validationIssue(attrs) {
          this.type = attrs.type; // required - name of rule that created the issue (e.g. 'missing_tag')

          this.subtype = attrs.subtype; // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')

          this.severity = attrs.severity; // required - 'warning' or 'error'

          this.message = attrs.message; // required - function returning localized string

          this.reference = attrs.reference; // optional - function(selection) to render reference information

          this.entityIds = attrs.entityIds; // optional - array of IDs of entities involved in the issue

          this.loc = attrs.loc; // optional - [lon, lat] to zoom in on to see the issue

          this.data = attrs.data; // optional - object containing extra data for the fixes

          this.dynamicFixes = attrs.dynamicFixes; // optional - function(context) returning fixes

          this.hash = attrs.hash; // optional - string to further differentiate the issue

          this.id = generateID.apply(this); // generated - see below

          this.autoFix = null; // generated - if autofix exists, will be set below
          // A unique, deterministic string hash.
          // Issues with identical id values are considered identical.

          function generateID() {
            var parts = [this.type];

            if (this.hash) {
              // subclasses can pass in their own differentiator
              parts.push(this.hash);
            }

            if (this.subtype) {
              parts.push(this.subtype);
            } // include the entities this issue is for
            // (sort them so the id is deterministic)


            if (this.entityIds) {
              var entityKeys = this.entityIds.slice().sort();
              parts.push.apply(parts, entityKeys);
            }

            return parts.join(':');
          }

          this.extent = function (resolver) {
            if (this.loc) {
              return geoExtent(this.loc);
            }

            if (this.entityIds && this.entityIds.length) {
              return this.entityIds.reduce(function (extent, entityId) {
                return extent.extend(resolver.entity(entityId).extent(resolver));
              }, geoExtent());
            }

            return null;
          };

          this.fixes = function (context) {
            var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
            var issue = this;

            if (issue.severity === 'warning') {
              // allow ignoring any issue that's not an error
              fixes.push(new validationIssueFix({
                title: _t.html('issues.fix.ignore_issue.title'),
                icon: 'iD-icon-close',
                onClick: function onClick() {
                  context.validator().ignoreIssue(this.issue.id);
                }
              }));
            }

            fixes.forEach(function (fix) {
              // the id doesn't matter as long as it's unique to this issue/fix
              fix.id = fix.title; // add a reference to the issue for use in actions

              fix.issue = issue;

              if (fix.autoArgs) {
                issue.autoFix = fix;
              }
            });
            return fixes;
          };
        }
        function validationIssueFix(attrs) {
          this.title = attrs.title; // Required

          this.onClick = attrs.onClick; // Optional - the function to run to apply the fix

          this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any

          this.icon = attrs.icon; // Optional - shows 'iD-icon-wrench' if not set

          this.entityIds = attrs.entityIds || []; // Optional - used for hover-higlighting.

          this.autoArgs = attrs.autoArgs; // Optional - pass [actions, annotation] arglist if this fix can automatically run

          this.issue = null; // Generated link - added by validationIssue
        }

        var buildRuleChecks = function buildRuleChecks() {
          return {
            equals: function equals(_equals) {
              return function (tags) {
                return Object.keys(_equals).every(function (k) {
                  return _equals[k] === tags[k];
                });
              };
            },
            notEquals: function notEquals(_notEquals) {
              return function (tags) {
                return Object.keys(_notEquals).some(function (k) {
                  return _notEquals[k] !== tags[k];
                });
              };
            },
            absence: function absence(_absence) {
              return function (tags) {
                return Object.keys(tags).indexOf(_absence) === -1;
              };
            },
            presence: function presence(_presence) {
              return function (tags) {
                return Object.keys(tags).indexOf(_presence) > -1;
              };
            },
            greaterThan: function greaterThan(_greaterThan) {
              var key = Object.keys(_greaterThan)[0];
              var value = _greaterThan[key];
              return function (tags) {
                return tags[key] > value;
              };
            },
            greaterThanEqual: function greaterThanEqual(_greaterThanEqual) {
              var key = Object.keys(_greaterThanEqual)[0];
              var value = _greaterThanEqual[key];
              return function (tags) {
                return tags[key] >= value;
              };
            },
            lessThan: function lessThan(_lessThan) {
              var key = Object.keys(_lessThan)[0];
              var value = _lessThan[key];
              return function (tags) {
                return tags[key] < value;
              };
            },
            lessThanEqual: function lessThanEqual(_lessThanEqual) {
              var key = Object.keys(_lessThanEqual)[0];
              var value = _lessThanEqual[key];
              return function (tags) {
                return tags[key] <= value;
              };
            },
            positiveRegex: function positiveRegex(_positiveRegex) {
              var tagKey = Object.keys(_positiveRegex)[0];

              var expression = _positiveRegex[tagKey].join('|');

              var regex = new RegExp(expression);
              return function (tags) {
                return regex.test(tags[tagKey]);
              };
            },
            negativeRegex: function negativeRegex(_negativeRegex) {
              var tagKey = Object.keys(_negativeRegex)[0];

              var expression = _negativeRegex[tagKey].join('|');

              var regex = new RegExp(expression);
              return function (tags) {
                return !regex.test(tags[tagKey]);
              };
            }
          };
        };

        var buildLineKeys = function buildLineKeys() {
          return {
            highway: {
              rest_area: true,
              services: true
            },
            railway: {
              roundhouse: true,
              station: true,
              traverser: true,
              turntable: true,
              wash: true
            }
          };
        };

        var serviceMapRules = {
          init: function init() {
            this._ruleChecks = buildRuleChecks();
            this._validationRules = [];
            this._areaKeys = osmAreaKeys;
            this._lineKeys = buildLineKeys();
          },
          // list of rules only relevant to tag checks...
          filterRuleChecks: function filterRuleChecks(selector) {
            var _ruleChecks = this._ruleChecks;
            return Object.keys(selector).reduce(function (rules, key) {
              if (['geometry', 'error', 'warning'].indexOf(key) === -1) {
                rules.push(_ruleChecks[key](selector[key]));
              }

              return rules;
            }, []);
          },
          // builds tagMap from mapcss-parse selector object...
          buildTagMap: function buildTagMap(selector) {
            var getRegexValues = function getRegexValues(regexes) {
              return regexes.map(function (regex) {
                return regex.replace(/\$|\^/g, '');
              });
            };

            var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
              var values;
              var isRegex = /regex/gi.test(key);
              var isEqual = /equals/gi.test(key);

              if (isRegex || isEqual) {
                Object.keys(selector[key]).forEach(function (selectorKey) {
                  values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);

                  if (expectedTags.hasOwnProperty(selectorKey)) {
                    values = values.concat(expectedTags[selectorKey]);
                  }

                  expectedTags[selectorKey] = values;
                });
              } else if (/(greater|less)Than(Equal)?|presence/g.test(key)) {
                var tagKey = /presence/.test(key) ? selector[key] : Object.keys(selector[key])[0];
                values = [selector[key][tagKey]];

                if (expectedTags.hasOwnProperty(tagKey)) {
                  values = values.concat(expectedTags[tagKey]);
                }

                expectedTags[tagKey] = values;
              }

              return expectedTags;
            }, {});
            return tagMap;
          },
          // inspired by osmWay#isArea()
          inferGeometry: function inferGeometry(tagMap) {
            var _lineKeys = this._lineKeys;
            var _areaKeys = this._areaKeys;

            var keyValueDoesNotImplyArea = function keyValueDoesNotImplyArea(key) {
              return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
            };

            var keyValueImpliesLine = function keyValueImpliesLine(key) {
              return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
            };

            if (tagMap.hasOwnProperty('area')) {
              if (tagMap.area.indexOf('yes') > -1) {
                return 'area';
              }

              if (tagMap.area.indexOf('no') > -1) {
                return 'line';
              }
            }

            for (var key in tagMap) {
              if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
                return 'area';
              }

              if (key in _lineKeys && keyValueImpliesLine(key)) {
                return 'area';
              }
            }

            return 'line';
          },
          // adds from mapcss-parse selector check...
          addRule: function addRule(selector) {
            var rule = {
              // checks relevant to mapcss-selector
              checks: this.filterRuleChecks(selector),
              // true if all conditions for a tag error are true..
              matches: function matches(entity) {
                return this.checks.every(function (check) {
                  return check(entity.tags);
                });
              },
              // borrowed from Way#isArea()
              inferredGeometry: this.inferGeometry(this.buildTagMap(selector), this._areaKeys),
              geometryMatches: function geometryMatches(entity, graph) {
                if (entity.type === 'node' || entity.type === 'relation') {
                  return selector.geometry === entity.type;
                } else if (entity.type === 'way') {
                  return this.inferredGeometry === entity.geometry(graph);
                }
              },
              // when geometries match and tag matches are present, return a warning...
              findIssues: function findIssues(entity, graph, issues) {
                if (this.geometryMatches(entity, graph) && this.matches(entity)) {
                  var severity = Object.keys(selector).indexOf('error') > -1 ? 'error' : 'warning';
                  var _message = selector[severity];
                  issues.push(new validationIssue({
                    type: 'maprules',
                    severity: severity,
                    message: function message() {
                      return _message;
                    },
                    entityIds: [entity.id]
                  }));
                }
              }
            };

            this._validationRules.push(rule);
          },
          clearRules: function clearRules() {
            this._validationRules = [];
          },
          // returns validationRules...
          validationRules: function validationRules() {
            return this._validationRules;
          },
          // returns ruleChecks
          ruleChecks: function ruleChecks() {
            return this._ruleChecks;
          }
        };

        var apibase$2 = 'https://nominatim.openstreetmap.org/';
        var _inflight$2 = {};

        var _nominatimCache;

        var serviceNominatim = {
          init: function init() {
            _inflight$2 = {};
            _nominatimCache = new RBush();
          },
          reset: function reset() {
            Object.values(_inflight$2).forEach(function (controller) {
              controller.abort();
            });
            _inflight$2 = {};
            _nominatimCache = new RBush();
          },
          countryCode: function countryCode(location, callback) {
            this.reverse(location, function (err, result) {
              if (err) {
                return callback(err);
              } else if (result.address) {
                return callback(null, result.address.country_code);
              } else {
                return callback('Unable to geocode', null);
              }
            });
          },
          reverse: function reverse(loc, callback) {
            var cached = _nominatimCache.search({
              minX: loc[0],
              minY: loc[1],
              maxX: loc[0],
              maxY: loc[1]
            });

            if (cached.length > 0) {
              if (callback) callback(null, cached[0].data);
              return;
            }

            var params = {
              zoom: 13,
              format: 'json',
              addressdetails: 1,
              lat: loc[1],
              lon: loc[0]
            };
            var url = apibase$2 + 'reverse?' + utilQsString(params);
            if (_inflight$2[url]) return;
            var controller = new AbortController();
            _inflight$2[url] = controller;
            d3_json(url, {
              signal: controller.signal
            }).then(function (result) {
              delete _inflight$2[url];

              if (result && result.error) {
                throw new Error(result.error);
              }

              var extent = geoExtent(loc).padByMeters(200);

              _nominatimCache.insert(Object.assign(extent.bbox(), {
                data: result
              }));

              if (callback) callback(null, result);
            })["catch"](function (err) {
              delete _inflight$2[url];
              if (err.name === 'AbortError') return;
              if (callback) callback(err.message);
            });
          },
          search: function search(val, callback) {
            var searchVal = encodeURIComponent(val);
            var url = apibase$2 + 'search/' + searchVal + '?limit=10&format=json';
            if (_inflight$2[url]) return;
            var controller = new AbortController();
            _inflight$2[url] = controller;
            d3_json(url, {
              signal: controller.signal
            }).then(function (result) {
              delete _inflight$2[url];

              if (result && result.error) {
                throw new Error(result.error);
              }

              if (callback) callback(null, result);
            })["catch"](function (err) {
              delete _inflight$2[url];
              if (err.name === 'AbortError') return;
              if (callback) callback(err.message);
            });
          }
        };

        // for punction see https://stackoverflow.com/a/21224179

        function simplify$1(str) {
          if (typeof str !== 'string') return '';
          return diacritics.remove(str.replace(/&/g, 'and').replace(/İ/ig, 'i') // for BİM, İşbank - #5017
          .replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>«»~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u2000-\u206f\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00-\u2e7f\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\ufeff\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g, '').toLowerCase());
        }

        var matchGroups$1 = {adult_gaming_centre:["amenity/casino","amenity/gambling","leisure/adult_gaming_centre"],beauty:["shop/beauty","shop/hairdresser_supply"],bed:["shop/bed","shop/furniture"],beverages:["shop/alcohol","shop/beer","shop/beverages","shop/wine"],camping:["leisure/park","tourism/camp_site","tourism/caravan_site"],car_parts:["shop/car_parts","shop/car_repair","shop/tires","shop/tyres"],clinic:["amenity/clinic","amenity/doctors","healthcare/clinic","healthcare/dialysis"],confectionery:["shop/candy","shop/chocolate","shop/confectionery"],convenience:["shop/beauty","shop/chemist","shop/convenience","shop/cosmetics","shop/grocery","shop/newsagent"],coworking:["amenity/coworking_space","office/coworking","office/coworking_space"],dentist:["amenity/dentist","amenity/doctors","healthcare/dentist"],electronics:["office/telecommunication","shop/computer","shop/electronics","shop/hifi","shop/mobile","shop/mobile_phone","shop/telecommunication"],fabric:["shop/fabric","shop/haberdashery","shop/sewing"],fashion:["shop/accessories","shop/bag","shop/botique","shop/clothes","shop/department_store","shop/fashion","shop/fashion_accessories","shop/sports","shop/shoes"],financial:["amenity/bank","office/accountant","office/financial","office/financial_advisor","office/tax_advisor","shop/tax"],fitness:["leisure/fitness_centre","leisure/fitness_center","leisure/sports_centre","leisure/sports_center"],food:["amenity/pub","amenity/bar","amenity/cafe","amenity/fast_food","amenity/ice_cream","amenity/restaurant","shop/bakery","shop/ice_cream","shop/pastry","shop/tea","shop/coffee"],fuel:["amenity/fuel","shop/gas","shop/convenience;gas","shop/gas;convenience"],gift:["shop/gift","shop/card","shop/cards","shop/stationery"],hardware:["shop/bathroom_furnishing","shop/carpet","shop/diy","shop/doityourself","shop/doors","shop/electrical","shop/flooring","shop/hardware","shop/hardware_store","shop/power_tools","shop/tool_hire","shop/tools","shop/trade"],health_food:["shop/health","shop/health_food","shop/herbalist","shop/nutrition_supplements"],hobby:["shop/electronics","shop/hobby","shop/books","shop/games","shop/collector","shop/toys","shop/model","shop/video_games","shop/anime"],hospital:["amenity/doctors","amenity/hospital","healthcare/hospital"],houseware:["shop/houseware","shop/interior_decoration"],lifeboat_station:["amenity/lifeboat_station","emergency/lifeboat_station","emergency/marine_rescue"],lodging:["tourism/hotel","tourism/motel"],money_transfer:["amenity/money_transfer","shop/money_transfer"],office_supplies:["shop/office_supplies","shop/stationary","shop/stationery"],outdoor:["shop/outdoor","shop/sports"],pharmacy:["amenity/doctors","amenity/pharmacy","healthcare/pharmacy"],playground:["amenity/theme_park","leisure/amusement_arcade","leisure/playground"],rental:["amenity/bicycle_rental","amenity/boat_rental","amenity/car_rental","amenity/truck_rental","amenity/vehicle_rental","shop/rental"],school:["amenity/childcare","amenity/college","amenity/kindergarten","amenity/language_school","amenity/prep_school","amenity/school","amenity/university"],supermarket:["shop/food","shop/frozen_food","shop/greengrocer","shop/grocery","shop/supermarket","shop/wholesale"],variety_store:["shop/variety_store","shop/discount","shop/convenience"],vending:["amenity/vending_machine","shop/vending_machine"],storage:["shop/storage_units","shop/storage_rental"],weight_loss:["amenity/doctors","amenity/weight_clinic","healthcare/counselling","leisure/fitness_centre","office/therapist","shop/beauty","shop/diet","shop/food","shop/health_food","shop/herbalist","shop/nutrition","shop/nutrition_supplements","shop/weight_loss"],wholesale:["shop/wholesale","shop/supermarket","shop/department_store"]};
        var matchGroupsJSON = {
        matchGroups: matchGroups$1
        };

        var genericWords = ["^(barn|bazaa?r|bench|bou?tique|building|casa|church)$","^(baseball|basketball|football|soccer|softball|tennis(halle)?)\\s?(field|court)?$","^(club|green|out|ware)\\s?house$","^(driveway|el árbol|fountain|golf|government|graveyard)$","^(hofladen|librairie|magazine?|maison)$","^(mobile home|skate)?\\s?park$","^(n\\s?\\/?\\s?a|name|no\\s?name|none|null|temporary|test|unknown)$","^(obuwie|pond|pool|sale|shops?|sklep|stores?)$","^\\?+$","^tattoo( studio)?$","^windmill$","^церковная( лавка)?$"];
        var genericWordsJSON = {
        genericWords: genericWords
        };

        var trees$1 = {brands:{emoji:"🍔",mainTag:"brand:wikidata",sourceTags:["brand","name"],nameTags:{primary:"^(name|name:\\w+)$",alternate:"^(brand|brand:\\w+|operator|operator:\\w+|\\w+_name|\\w+_name:\\w+)$"}},flags:{emoji:"🚩",mainTag:"flag:wikidata",nameTags:{primary:"^(flag:name|flag:name:\\w+)$",alternate:"^(country|country:\\w+|flag|flag:\\w+|subject|subject:\\w+)$"}},operators:{emoji:"💼",mainTag:"operator:wikidata",sourceTags:["operator"],nameTags:{primary:"^(name|name:\\w+|operator|operator:\\w+)$",alternate:"^(brand|brand:\\w+|\\w+_name|\\w+_name:\\w+)$"}},transit:{emoji:"🚇",mainTag:"network:wikidata",sourceTags:["network"],nameTags:{primary:"^network$",alternate:"^(operator|operator:\\w+|network:\\w+|\\w+_name|\\w+_name:\\w+)$"}}};
        var treesJSON = {
        trees: trees$1
        };

        var matchGroups = matchGroupsJSON.matchGroups;
        var trees = treesJSON.trees;
        var Matcher = /*#__PURE__*/function () {
          //
          // `constructor`
          // initialize the genericWords regexes
          function Matcher() {
            var _this = this;

            _classCallCheck$1(this, Matcher);

            // The `matchIndex` is a specialized structure that allows us to quickly answer
            //   _"Given a [key/value tagpair, name, location], what canonical items (brands etc) can match it?"_
            //
            // The index contains all valid combinations of k/v tagpairs and names
            // matchIndex:
            // {
            //   'k/v': {
            //     'primary':         Map (String 'nsimple' -> Set (itemIDs…),   // matches for tags like `name`, `name:xx`, etc.
            //     'alternate':       Map (String 'nsimple' -> Set (itemIDs…),   // matches for tags like `alt_name`, `brand`, etc.
            //     'excludeNamed':    Map (String 'pattern' -> RegExp),
            //     'excludeGeneric':  Map (String 'pattern' -> RegExp)
            //   },
            // }
            //
            // {
            //   'amenity/bank': {
            //     'primary': {
            //       'firstbank':              Set ("firstbank-978cca", "firstbank-9794e6", "firstbank-f17495", …),
            //       …
            //     },
            //     'alternate': {
            //       '1stbank':                Set ("firstbank-f17495"),
            //       …
            //     }
            //   },
            //   'shop/supermarket': {
            //     'primary': {
            //       'coop':                   Set ("coop-76454b", "coop-ebf2d9", "coop-36e991", …),
            //       'coopfood':               Set ("coopfood-a8278b", …),
            //       …
            //     },
            //     'alternate': {
            //       'coop':                   Set ("coopfood-a8278b", …),
            //       'federatedcooperatives':  Set ("coop-76454b", …),
            //       'thecooperative':         Set ("coopfood-a8278b", …),
            //       …
            //     }
            //   }
            // }
            //
            this.matchIndex = undefined; // The `genericWords` structure matches the contents of genericWords.json to instantiated RegExp objects
            // Map (String 'pattern' -> RegExp),

            this.genericWords = new Map();
            (genericWordsJSON.genericWords || []).forEach(function (s) {
              return _this.genericWords.set(s, new RegExp(s, 'i'));
            }); // The `itemLocation` structure maps itemIDs to locationSetIDs:
            // {
            //   'firstbank-f17495':  '+[first_bank_western_us.geojson]',
            //   'firstbank-978cca':  '+[first_bank_carolinas.geojson]',
            //   'coop-76454b':       '+[Q16]',
            //   'coopfood-a8278b':   '+[Q23666]',
            //   …
            // }

            this.itemLocation = undefined; // The `locationSets` structure maps locationSetIDs to *resolved* locationSets:
            // {
            //   '+[first_bank_western_us.geojson]':  GeoJSON {…},
            //   '+[first_bank_carolinas.geojson]':   GeoJSON {…},
            //   '+[Q16]':                            GeoJSON {…},
            //   '+[Q23666]':                         GeoJSON {…},
            //   …
            // }

            this.locationSets = undefined; // The `locationIndex` is an instance of which-polygon spatial index for the locationSets.

            this.locationIndex = undefined; // Array of match conflict pairs (currently unused)

            this.warnings = [];
          } //
          // `buildMatchIndex()`
          // Call this to prepare the matcher for use
          //
          // `data` needs to be an Object indexed on a 'tree/key/value' path.
          // (e.g. cache filled by `fileTree.read` or data found in `dist/nsi.json`)
          // {
          //    'brands/amenity/bank': { properties: {}, items: [ {}, {}, … ] },
          //    'brands/amenity/bar':  { properties: {}, items: [ {}, {}, … ] },
          //    …
          // }
          //


          _createClass$1(Matcher, [{
            key: "buildMatchIndex",
            value: function buildMatchIndex(data) {
              var that = this;
              if (that.matchIndex) return; // it was built already

              that.matchIndex = new Map();
              Object.keys(data).forEach(function (tkv) {
                var category = data[tkv];
                var parts = tkv.split('/', 3); // tkv = "tree/key/value"

                var t = parts[0];
                var k = parts[1];
                var v = parts[2];
                var thiskv = "".concat(k, "/").concat(v);
                var tree = trees[t];
                var branch = that.matchIndex.get(thiskv);

                if (!branch) {
                  branch = {
                    primary: new Map(),
                    alternate: new Map(),
                    excludeGeneric: new Map(),
                    excludeNamed: new Map()
                  };
                  that.matchIndex.set(thiskv, branch);
                } // ADD EXCLUSIONS


                var properties = category.properties || {};
                var exclude = properties.exclude || {};
                (exclude.generic || []).forEach(function (s) {
                  return branch.excludeGeneric.set(s, new RegExp(s, 'i'));
                });
                (exclude.named || []).forEach(function (s) {
                  return branch.excludeNamed.set(s, new RegExp(s, 'i'));
                });
                var excludeRegexes = [].concat(_toConsumableArray(branch.excludeGeneric.values()), _toConsumableArray(branch.excludeNamed.values())); // ADD ITEMS

                var items = category.items;
                if (!Array.isArray(items) || !items.length) return; // Primary name patterns, match tags to take first
                //  e.g. `name`, `name:ru`

                var primaryName = new RegExp(tree.nameTags.primary, 'i'); // Alternate name patterns, match tags to consider after primary
                //  e.g. `alt_name`, `short_name`, `brand`, `brand:ru`, etc..

                var alternateName = new RegExp(tree.nameTags.alternate, 'i'); // There are a few exceptions to the name matching regexes.
                // Usually a tag suffix contains a language code like `name:en`, `name:ru`
                // but we want to exclude things like `operator:type`, `name:etymology`, etc..

                var notName = /:(colou?r|type|forward|backward|left|right|etymology|pronunciation|wikipedia)$/i; // For certain categories we do not want to match generic KV pairs like `building/yes` or `amenity/yes`

                var skipGenericKV = skipGenericKVMatches(t, k, v); // We will collect the generic KV pairs anyway (for the purpose of filtering them out of matchTags)

                var genericKV = new Set(["".concat(k, "/yes"), "building/yes"]); // Collect alternate tagpairs for this kv category from matchGroups.
                // We might also pick up a few more generic KVs (like `shop/yes`)

                var matchGroupKV = new Set();
                Object.values(matchGroups).forEach(function (matchGroup) {
                  var inGroup = matchGroup.some(function (otherkv) {
                    return otherkv === thiskv;
                  });
                  if (!inGroup) return;
                  matchGroup.forEach(function (otherkv) {
                    if (otherkv === thiskv) return; // skip self

                    matchGroupKV.add(otherkv);
                    var otherk = otherkv.split('/', 2)[0]; // we might pick up a `shop/yes`

                    genericKV.add("".concat(otherk, "/yes"));
                  });
                }); // For each item, insert all [key, value, name] combinations into the match index

                items.forEach(function (item) {
                  if (!item.id) return; // Automatically remove redundant `matchTags` - #3417
                  // (i.e. This kv is already covered by matchGroups, so it doesn't need to be in `item.matchTags`)

                  if (Array.isArray(item.matchTags) && item.matchTags.length) {
                    item.matchTags = item.matchTags.filter(function (matchTag) {
                      return !matchGroupKV.has(matchTag) && !genericKV.has(matchTag);
                    });
                    if (!item.matchTags.length) delete item.matchTags;
                  } // key/value tagpairs to insert into the match index..


                  var kvTags = ["".concat(thiskv)].concat(item.matchTags || []);

                  if (!skipGenericKV) {
                    kvTags = kvTags.concat(Array.from(genericKV)); // #3454 - match some generic tags
                  } // Index all the namelike tag values


                  Object.keys(item.tags).forEach(function (osmkey) {
                    if (notName.test(osmkey)) return; // osmkey is not a namelike tag, skip

                    var osmvalue = item.tags[osmkey];
                    if (!osmvalue || excludeRegexes.some(function (regex) {
                      return regex.test(osmvalue);
                    })) return; // osmvalue missing or excluded

                    if (primaryName.test(osmkey)) {
                      kvTags.forEach(function (kv) {
                        return insertName('primary', kv, simplify$1(osmvalue), item.id);
                      });
                    } else if (alternateName.test(osmkey)) {
                      kvTags.forEach(function (kv) {
                        return insertName('alternate', kv, simplify$1(osmvalue), item.id);
                      });
                    }
                  }); // Index `matchNames` after indexing all other names..

                  var keepMatchNames = new Set();
                  (item.matchNames || []).forEach(function (matchName) {
                    // If this matchname isn't already indexed, add it to the alternate index
                    var nsimple = simplify$1(matchName);
                    kvTags.forEach(function (kv) {
                      var branch = that.matchIndex.get(kv);
                      var primaryLeaf = branch && branch.primary.get(nsimple);
                      var alternateLeaf = branch && branch.alternate.get(nsimple);
                      var inPrimary = primaryLeaf && primaryLeaf.has(item.id);
                      var inAlternate = alternateLeaf && alternateLeaf.has(item.id);

                      if (!inPrimary && !inAlternate) {
                        insertName('alternate', kv, nsimple, item.id);
                        keepMatchNames.add(matchName);
                      }
                    });
                  }); // Automatically remove redundant `matchNames` - #3417
                  // (i.e. This name got indexed some other way, so it doesn't need to be in `item.matchNames`)

                  if (keepMatchNames.size) {
                    item.matchNames = Array.from(keepMatchNames);
                  } else {
                    delete item.matchNames;
                  }
                }); // each item
              }); // each tkv
              // Insert this item into the matchIndex

              function insertName(which, kv, nsimple, itemID) {
                if (!nsimple) return;
                var branch = that.matchIndex.get(kv);

                if (!branch) {
                  branch = {
                    primary: new Map(),
                    alternate: new Map(),
                    excludeGeneric: new Map(),
                    excludeNamed: new Map()
                  };
                  that.matchIndex.set(kv, branch);
                }

                var leaf = branch[which].get(nsimple);

                if (!leaf) {
                  leaf = new Set();
                  branch[which].set(nsimple, leaf);
                }

                leaf.add(itemID); // insert
              } // For certain categories we do not want to match generic KV pairs like `building/yes` or `amenity/yes`


              function skipGenericKVMatches(t, k, v) {
                return t === 'flags' || t === 'transit' || k === 'landuse' || v === 'atm' || v === 'bicycle_parking' || v === 'car_sharing' || v === 'caravan_site' || v === 'charging_station' || v === 'dog_park' || v === 'parking' || v === 'phone' || v === 'playground' || v === 'post_box' || v === 'public_bookcase' || v === 'recycling' || v === 'vending_machine';
              }
            } //
            // `buildLocationIndex()`
            // Call this to prepare a which-polygon location index.
            // This *resolves* all the locationSets into GeoJSON, which takes some time.
            // You can skip this step if you don't care about matching within a location.
            //
            // `data` needs to be an Object indexed on a 'tree/key/value' path.
            // (e.g. cache filled by `fileTree.read` or data found in `dist/nsi.json`)
            // {
            //    'brands/amenity/bank': { properties: {}, items: [ {}, {}, … ] },
            //    'brands/amenity/bar':  { properties: {}, items: [ {}, {}, … ] },
            //    …
            // }
            //

          }, {
            key: "buildLocationIndex",
            value: function buildLocationIndex(data, loco) {
              var that = this;
              if (that.locationIndex) return; // it was built already

              that.itemLocation = new Map();
              that.locationSets = new Map();
              Object.keys(data).forEach(function (tkv) {
                var items = data[tkv].items;
                if (!Array.isArray(items) || !items.length) return;
                items.forEach(function (item) {
                  if (that.itemLocation.has(item.id)) return; // we've seen item id already - shouldn't be possible?

                  var resolved;

                  try {
                    resolved = loco.resolveLocationSet(item.locationSet); // resolve a feature for this locationSet
                  } catch (err) {
                    console.warn("buildLocationIndex: ".concat(err.message)); // couldn't resolve
                  }

                  if (!resolved || !resolved.id) return;
                  that.itemLocation.set(item.id, resolved.id); // link it to the item

                  if (that.locationSets.has(resolved.id)) return; // we've seen this locationSet feature before..
                  // First time seeing this locationSet feature, make a copy and add to locationSet cache..

                  var feature = _cloneDeep(resolved.feature);

                  feature.id = resolved.id; // Important: always use the locationSet `id` (`+[Q30]`), not the feature `id` (`Q30`)

                  feature.properties.id = resolved.id;

                  if (!feature.geometry.coordinates.length || !feature.properties.area) {
                    console.warn("buildLocationIndex: locationSet ".concat(resolved.id, " for ").concat(item.id, " resolves to an empty feature:"));
                    console.warn(JSON.stringify(feature));
                    return;
                  }

                  that.locationSets.set(resolved.id, feature);
                });
              });
              that.locationIndex = whichPolygon_1({
                type: 'FeatureCollection',
                features: _toConsumableArray(that.locationSets.values())
              });

              function _cloneDeep(obj) {
                return JSON.parse(JSON.stringify(obj));
              }
            } //
            // `match()`
            // Pass parts and return an Array of matches.
            // `k` - key
            // `v` - value
            // `n` - namelike
            // `loc` - optional - [lon,lat] location to search
            //
            // 1. If the [k,v,n] tuple matches a canonical item…
            // Return an Array of match results.
            // Each result will include the area in km² that the item is valid.
            //
            // Order of results:
            // Primary ordering will be on the "match" column:
            //   "primary" - where the query matches the `name` tag, followed by
            //   "alternate" - where the query matches an alternate name tag (e.g. short_name, brand, operator, etc)
            // Secondary ordering will be on the "area" column:
            //   "area descending" if no location was provided, (worldwide before local)
            //   "area ascending" if location was provided (local before worldwide)
            //
            // [
            //   { match: 'primary',   itemID: String,  area: Number,  kv: String,  nsimple: String },
            //   { match: 'primary',   itemID: String,  area: Number,  kv: String,  nsimple: String },
            //   { match: 'alternate', itemID: String,  area: Number,  kv: String,  nsimple: String },
            //   { match: 'alternate', itemID: String,  area: Number,  kv: String,  nsimple: String },
            //   …
            // ]
            //
            // -or-
            //
            // 2. If the [k,v,n] tuple matches an exclude pattern…
            // Return an Array with a single exclude result, either
            //
            // [ { match: 'excludeGeneric', pattern: String,  kv: String } ]  // "generic" e.g. "Food Court"
            //   or
            // [ { match: 'excludeNamed', pattern: String,  kv: String } ]    // "named", e.g. "Kebabai"
            //
            // About results
            //   "generic" - a generic word that is probably not really a name.
            //     For these, iD should warn the user "Hey don't put 'food court' in the name tag".
            //   "named" - a real name like "Kebabai" that is just common, but not a brand.
            //     For these, iD should just let it be. We don't include these in NSI, but we don't want to nag users about it either.
            //
            // -or-
            //
            // 3. If the [k,v,n] tuple matches nothing of any kind, return `null`
            //
            //

          }, {
            key: "match",
            value: function match(k, v, n, loc) {
              var that = this;

              if (!that.matchIndex) {
                throw new Error('match:  matchIndex not built.');
              } // If we were supplied a location, and a that.locationIndex has been set up,
              // get the locationSets that are valid there so we can filter results.


              var matchLocations;

              if (Array.isArray(loc) && that.locationIndex) {
                // which-polygon query returns an array of GeoJSON properties, pass true to return all results
                matchLocations = that.locationIndex([loc[0], loc[1], loc[0], loc[1]], true);
              }

              var nsimple = simplify$1(n);
              var seen = new Set();
              var results = [];
              gatherResults('primary');
              gatherResults('alternate');
              if (results.length) return results;
              gatherResults('exclude');
              return results.length ? results : null;

              function gatherResults(which) {
                // First try an exact match on k/v
                var kv = "".concat(k, "/").concat(v);
                var didMatch = tryMatch(which, kv);
                if (didMatch) return; // If that didn't work, look in match groups for other pairs considered equivalent to k/v..

                for (var mg in matchGroups) {
                  var matchGroup = matchGroups[mg];
                  var inGroup = matchGroup.some(function (otherkv) {
                    return otherkv === kv;
                  });
                  if (!inGroup) continue;

                  for (var i = 0; i < matchGroup.length; i++) {
                    var otherkv = matchGroup[i];
                    if (otherkv === kv) continue; // skip self

                    didMatch = tryMatch(which, otherkv);
                    if (didMatch) return;
                  }
                } // If finished 'exclude' pass and still haven't matched anything, try the global `genericWords.json` patterns


                if (which === 'exclude') {
                  var regex = _toConsumableArray(that.genericWords.values()).find(function (regex) {
                    return regex.test(n);
                  });

                  if (regex) {
                    results.push({
                      match: 'excludeGeneric',
                      pattern: String(regex)
                    }); // note no `branch`, no `kv`

                    return;
                  }
                }
              }

              function tryMatch(which, kv) {
                var branch = that.matchIndex.get(kv);
                if (!branch) return;

                if (which === 'exclude') {
                  // Test name `n` against named and generic exclude patterns
                  var regex = _toConsumableArray(branch.excludeNamed.values()).find(function (regex) {
                    return regex.test(n);
                  });

                  if (regex) {
                    results.push({
                      match: 'excludeNamed',
                      pattern: String(regex),
                      kv: kv
                    });
                    return;
                  }

                  regex = _toConsumableArray(branch.excludeGeneric.values()).find(function (regex) {
                    return regex.test(n);
                  });

                  if (regex) {
                    results.push({
                      match: 'excludeGeneric',
                      pattern: String(regex),
                      kv: kv
                    });
                    return;
                  }

                  return;
                }

                var leaf = branch[which].get(nsimple);
                if (!leaf || !leaf.size) return; // If we get here, we matched something..
                // Prepare the results, calculate areas (if location index was set up)

                var hits = Array.from(leaf).map(function (itemID) {
                  var area = Infinity;

                  if (that.itemLocation && that.locationSets) {
                    var location = that.locationSets.get(that.itemLocation.get(itemID));
                    area = location && location.properties.area || Infinity;
                  }

                  return {
                    match: which,
                    itemID: itemID,
                    area: area,
                    kv: kv,
                    nsimple: nsimple
                  };
                });
                var sortFn = byAreaDescending; // Filter the match to include only results valid in the requested `loc`..

                if (matchLocations) {
                  hits = hits.filter(isValidLocation);
                  sortFn = byAreaAscending;
                }

                if (!hits.length) return; // push results

                hits.sort(sortFn).forEach(function (hit) {
                  if (seen.has(hit.itemID)) return;
                  seen.add(hit.itemID);
                  results.push(hit);
                });
                return true;

                function isValidLocation(hit) {
                  if (!that.itemLocation) return true;
                  return matchLocations.find(function (props) {
                    return props.id === that.itemLocation.get(hit.itemID);
                  });
                } // Sort smaller (more local) locations first.


                function byAreaAscending(hitA, hitB) {
                  return hitA.area - hitB.area;
                } // Sort larger (more worldwide) locations first.


                function byAreaDescending(hitA, hitB) {
                  return hitB.area - hitA.area;
                }
              }
            } //
            // `getWarnings()`
            // Return any warnings discovered when buiding the index.
            // (currently this does nothing)
            //

          }, {
            key: "getWarnings",
            value: function getWarnings() {
              return this.warnings;
            }
          }]);

          return Matcher;
        }();

        /**
         * Checks if `value` is the
         * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
         * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
         *
         * @static
         * @memberOf _
         * @since 0.1.0
         * @category Lang
         * @param {*} value The value to check.
         * @returns {boolean} Returns `true` if `value` is an object, else `false`.
         * @example
         *
         * _.isObject({});
         * // => true
         *
         * _.isObject([1, 2, 3]);
         * // => true
         *
         * _.isObject(_.noop);
         * // => true
         *
         * _.isObject(null);
         * // => false
         */
        function isObject$2(value) {
          var type = _typeof(value);

          return value != null && (type == 'object' || type == 'function');
        }

        /** Detect free variable `global` from Node.js. */
        var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global && global.Object === Object && global;

        /** Detect free variable `self`. */

        var freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
        /** Used as a reference to the global object. */

        var root = freeGlobal || freeSelf || Function('return this')();

        /**
         * Gets the timestamp of the number of milliseconds that have elapsed since
         * the Unix epoch (1 January 1970 00:00:00 UTC).
         *
         * @static
         * @memberOf _
         * @since 2.4.0
         * @category Date
         * @returns {number} Returns the timestamp.
         * @example
         *
         * _.defer(function(stamp) {
         *   console.log(_.now() - stamp);
         * }, _.now());
         * // => Logs the number of milliseconds it took for the deferred invocation.
         */

        var now = function now() {
          return root.Date.now();
        };

        /** Used to match a single whitespace character. */
        var reWhitespace = /\s/;
        /**
         * Used by `_.trim` and `_.trimEnd` to get the index of the last non-whitespace
         * character of `string`.
         *
         * @private
         * @param {string} string The string to inspect.
         * @returns {number} Returns the index of the last non-whitespace character.
         */

        function trimmedEndIndex(string) {
          var index = string.length;

          while (index-- && reWhitespace.test(string.charAt(index))) {}

          return index;
        }

        /** Used to match leading whitespace. */

        var reTrimStart = /^\s+/;
        /**
         * The base implementation of `_.trim`.
         *
         * @private
         * @param {string} string The string to trim.
         * @returns {string} Returns the trimmed string.
         */

        function baseTrim(string) {
          return string ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '') : string;
        }

        /** Built-in value references. */

        var _Symbol = root.Symbol;

        /** Used for built-in method references. */

        var objectProto$1 = Object.prototype;
        /** Used to check objects for own properties. */

        var hasOwnProperty$2 = objectProto$1.hasOwnProperty;
        /**
         * Used to resolve the
         * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
         * of values.
         */

        var nativeObjectToString$1 = objectProto$1.toString;
        /** Built-in value references. */

        var symToStringTag$1 = _Symbol ? _Symbol.toStringTag : undefined;
        /**
         * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
         *
         * @private
         * @param {*} value The value to query.
         * @returns {string} Returns the raw `toStringTag`.
         */

        function getRawTag(value) {
          var isOwn = hasOwnProperty$2.call(value, symToStringTag$1),
              tag = value[symToStringTag$1];

          try {
            value[symToStringTag$1] = undefined;
            var unmasked = true;
          } catch (e) {}

          var result = nativeObjectToString$1.call(value);

          if (unmasked) {
            if (isOwn) {
              value[symToStringTag$1] = tag;
            } else {
              delete value[symToStringTag$1];
            }
          }

          return result;
        }

        /** Used for built-in method references. */
        var objectProto = Object.prototype;
        /**
         * Used to resolve the
         * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
         * of values.
         */

        var nativeObjectToString = objectProto.toString;
        /**
         * Converts `value` to a string using `Object.prototype.toString`.
         *
         * @private
         * @param {*} value The value to convert.
         * @returns {string} Returns the converted string.
         */

        function objectToString(value) {
          return nativeObjectToString.call(value);
        }

        /** `Object#toString` result references. */

        var nullTag = '[object Null]',
            undefinedTag = '[object Undefined]';
        /** Built-in value references. */

        var symToStringTag = _Symbol ? _Symbol.toStringTag : undefined;
        /**
         * The base implementation of `getTag` without fallbacks for buggy environments.
         *
         * @private
         * @param {*} value The value to query.
         * @returns {string} Returns the `toStringTag`.
         */

        function baseGetTag(value) {
          if (value == null) {
            return value === undefined ? undefinedTag : nullTag;
          }

          return symToStringTag && symToStringTag in Object(value) ? getRawTag(value) : objectToString(value);
        }

        /**
         * Checks if `value` is object-like. A value is object-like if it's not `null`
         * and has a `typeof` result of "object".
         *
         * @static
         * @memberOf _
         * @since 4.0.0
         * @category Lang
         * @param {*} value The value to check.
         * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
         * @example
         *
         * _.isObjectLike({});
         * // => true
         *
         * _.isObjectLike([1, 2, 3]);
         * // => true
         *
         * _.isObjectLike(_.noop);
         * // => false
         *
         * _.isObjectLike(null);
         * // => false
         */
        function isObjectLike(value) {
          return value != null && _typeof(value) == 'object';
        }

        /** `Object#toString` result references. */

        var symbolTag = '[object Symbol]';
        /**
         * Checks if `value` is classified as a `Symbol` primitive or object.
         *
         * @static
         * @memberOf _
         * @since 4.0.0
         * @category Lang
         * @param {*} value The value to check.
         * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
         * @example
         *
         * _.isSymbol(Symbol.iterator);
         * // => true
         *
         * _.isSymbol('abc');
         * // => false
         */

        function isSymbol(value) {
          return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
        }

        /** Used as references for various `Number` constants. */

        var NAN = 0 / 0;
        /** Used to detect bad signed hexadecimal string values. */

        var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
        /** Used to detect binary string values. */

        var reIsBinary = /^0b[01]+$/i;
        /** Used to detect octal string values. */

        var reIsOctal = /^0o[0-7]+$/i;
        /** Built-in method references without a dependency on `root`. */

        var freeParseInt = parseInt;
        /**
         * Converts `value` to a number.
         *
         * @static
         * @memberOf _
         * @since 4.0.0
         * @category Lang
         * @param {*} value The value to process.
         * @returns {number} Returns the number.
         * @example
         *
         * _.toNumber(3.2);
         * // => 3.2
         *
         * _.toNumber(Number.MIN_VALUE);
         * // => 5e-324
         *
         * _.toNumber(Infinity);
         * // => Infinity
         *
         * _.toNumber('3.2');
         * // => 3.2
         */

        function toNumber(value) {
          if (typeof value == 'number') {
            return value;
          }

          if (isSymbol(value)) {
            return NAN;
          }

          if (isObject$2(value)) {
            var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
            value = isObject$2(other) ? other + '' : other;
          }

          if (typeof value != 'string') {
            return value === 0 ? value : +value;
          }

          value = baseTrim(value);
          var isBinary = reIsBinary.test(value);
          return isBinary || reIsOctal.test(value) ? freeParseInt(value.slice(2), isBinary ? 2 : 8) : reIsBadHex.test(value) ? NAN : +value;
        }

        /** Error message constants. */

        var FUNC_ERROR_TEXT$1 = 'Expected a function';
        /* Built-in method references for those with the same name as other `lodash` methods. */

        var nativeMax = Math.max,
            nativeMin = Math.min;
        /**
         * Creates a debounced function that delays invoking `func` until after `wait`
         * milliseconds have elapsed since the last time the debounced function was
         * invoked. The debounced function comes with a `cancel` method to cancel
         * delayed `func` invocations and a `flush` method to immediately invoke them.
         * Provide `options` to indicate whether `func` should be invoked on the
         * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
         * with the last arguments provided to the debounced function. Subsequent
         * calls to the debounced function return the result of the last `func`
         * invocation.
         *
         * **Note:** If `leading` and `trailing` options are `true`, `func` is
         * invoked on the trailing edge of the timeout only if the debounced function
         * is invoked more than once during the `wait` timeout.
         *
         * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
         * until to the next tick, similar to `setTimeout` with a timeout of `0`.
         *
         * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
         * for details over the differences between `_.debounce` and `_.throttle`.
         *
         * @static
         * @memberOf _
         * @since 0.1.0
         * @category Function
         * @param {Function} func The function to debounce.
         * @param {number} [wait=0] The number of milliseconds to delay.
         * @param {Object} [options={}] The options object.
         * @param {boolean} [options.leading=false]
         *  Specify invoking on the leading edge of the timeout.
         * @param {number} [options.maxWait]
         *  The maximum time `func` is allowed to be delayed before it's invoked.
         * @param {boolean} [options.trailing=true]
         *  Specify invoking on the trailing edge of the timeout.
         * @returns {Function} Returns the new debounced function.
         * @example
         *
         * // Avoid costly calculations while the window size is in flux.
         * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
         *
         * // Invoke `sendMail` when clicked, debouncing subsequent calls.
         * jQuery(element).on('click', _.debounce(sendMail, 300, {
         *   'leading': true,
         *   'trailing': false
         * }));
         *
         * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
         * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
         * var source = new EventSource('/stream');
         * jQuery(source).on('message', debounced);
         *
         * // Cancel the trailing debounced invocation.
         * jQuery(window).on('popstate', debounced.cancel);
         */

        function debounce(func, wait, options) {
          var lastArgs,
              lastThis,
              maxWait,
              result,
              timerId,
              lastCallTime,
              lastInvokeTime = 0,
              leading = false,
              maxing = false,
              trailing = true;

          if (typeof func != 'function') {
            throw new TypeError(FUNC_ERROR_TEXT$1);
          }

          wait = toNumber(wait) || 0;

          if (isObject$2(options)) {
            leading = !!options.leading;
            maxing = 'maxWait' in options;
            maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
            trailing = 'trailing' in options ? !!options.trailing : trailing;
          }

          function invokeFunc(time) {
            var args = lastArgs,
                thisArg = lastThis;
            lastArgs = lastThis = undefined;
            lastInvokeTime = time;
            result = func.apply(thisArg, args);
            return result;
          }

          function leadingEdge(time) {
            // Reset any `maxWait` timer.
            lastInvokeTime = time; // Start the timer for the trailing edge.

            timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.

            return leading ? invokeFunc(time) : result;
          }

          function remainingWait(time) {
            var timeSinceLastCall = time - lastCallTime,
                timeSinceLastInvoke = time - lastInvokeTime,
                timeWaiting = wait - timeSinceLastCall;
            return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
          }

          function shouldInvoke(time) {
            var timeSinceLastCall = time - lastCallTime,
                timeSinceLastInvoke = time - lastInvokeTime; // Either this is the first call, activity has stopped and we're at the
            // trailing edge, the system time has gone backwards and we're treating
            // it as the trailing edge, or we've hit the `maxWait` limit.

            return lastCallTime === undefined || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
          }

          function timerExpired() {
            var time = now();

            if (shouldInvoke(time)) {
              return trailingEdge(time);
            } // Restart the timer.


            timerId = setTimeout(timerExpired, remainingWait(time));
          }

          function trailingEdge(time) {
            timerId = undefined; // Only invoke if we have `lastArgs` which means `func` has been
            // debounced at least once.

            if (trailing && lastArgs) {
              return invokeFunc(time);
            }

            lastArgs = lastThis = undefined;
            return result;
          }

          function cancel() {
            if (timerId !== undefined) {
              clearTimeout(timerId);
            }

            lastInvokeTime = 0;
            lastArgs = lastCallTime = lastThis = timerId = undefined;
          }

          function flush() {
            return timerId === undefined ? result : trailingEdge(now());
          }

          function debounced() {
            var time = now(),
                isInvoking = shouldInvoke(time);
            lastArgs = arguments;
            lastThis = this;
            lastCallTime = time;

            if (isInvoking) {
              if (timerId === undefined) {
                return leadingEdge(lastCallTime);
              }

              if (maxing) {
                // Handle invocations in a tight loop.
                clearTimeout(timerId);
                timerId = setTimeout(timerExpired, wait);
                return invokeFunc(lastCallTime);
              }
            }

            if (timerId === undefined) {
              timerId = setTimeout(timerExpired, wait);
            }

            return result;
          }

          debounced.cancel = cancel;
          debounced.flush = flush;
          return debounced;
        }

        /*
            iD.coreDifference represents the difference between two graphs.
            It knows how to calculate the set of entities that were
            created, modified, or deleted, and also contains the logic
            for recursively extending a difference to the complete set
            of entities that will require a redraw, taking into account
            child and parent relationships.
         */

        function coreDifference(base, head) {
          var _changes = {};
          var _didChange = {}; // 'addition', 'deletion', 'geometry', 'properties'

          var _diff = {};

          function checkEntityID(id) {
            var h = head.entities[id];
            var b = base.entities[id];
            if (h === b) return;
            if (_changes[id]) return;

            if (!h && b) {
              _changes[id] = {
                base: b,
                head: h
              };
              _didChange.deletion = true;
              return;
            }

            if (h && !b) {
              _changes[id] = {
                base: b,
                head: h
              };
              _didChange.addition = true;
              return;
            }

            if (h && b) {
              if (h.members && b.members && !fastDeepEqual(h.members, b.members)) {
                _changes[id] = {
                  base: b,
                  head: h
                };
                _didChange.geometry = true;
                _didChange.properties = true;
                return;
              }

              if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
                _changes[id] = {
                  base: b,
                  head: h
                };
                _didChange.geometry = true;
              }

              if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
                _changes[id] = {
                  base: b,
                  head: h
                };
                _didChange.geometry = true;
              }

              if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
                _changes[id] = {
                  base: b,
                  head: h
                };
                _didChange.properties = true;
              }
            }
          }

          function load() {
            // HOT CODE: there can be many thousands of downloaded entities, so looping
            // through them all can become a performance bottleneck. Optimize by
            // resolving duplicates and using a basic `for` loop
            var ids = utilArrayUniq(Object.keys(head.entities).concat(Object.keys(base.entities)));

            for (var i = 0; i < ids.length; i++) {
              checkEntityID(ids[i]);
            }
          }

          load();

          _diff.length = function length() {
            return Object.keys(_changes).length;
          };

          _diff.changes = function changes() {
            return _changes;
          };

          _diff.didChange = _didChange; // pass true to include affected relation members

          _diff.extantIDs = function extantIDs(includeRelMembers) {
            var result = new Set();
            Object.keys(_changes).forEach(function (id) {
              if (_changes[id].head) {
                result.add(id);
              }

              var h = _changes[id].head;
              var b = _changes[id].base;
              var entity = h || b;

              if (includeRelMembers && entity.type === 'relation') {
                var mh = h ? h.members.map(function (m) {
                  return m.id;
                }) : [];
                var mb = b ? b.members.map(function (m) {
                  return m.id;
                }) : [];
                utilArrayUnion(mh, mb).forEach(function (memberID) {
                  if (head.hasEntity(memberID)) {
                    result.add(memberID);
                  }
                });
              }
            });
            return Array.from(result);
          };

          _diff.modified = function modified() {
            var result = [];
            Object.values(_changes).forEach(function (change) {
              if (change.base && change.head) {
                result.push(change.head);
              }
            });
            return result;
          };

          _diff.created = function created() {
            var result = [];
            Object.values(_changes).forEach(function (change) {
              if (!change.base && change.head) {
                result.push(change.head);
              }
            });
            return result;
          };

          _diff.deleted = function deleted() {
            var result = [];
            Object.values(_changes).forEach(function (change) {
              if (change.base && !change.head) {
                result.push(change.base);
              }
            });
            return result;
          };

          _diff.summary = function summary() {
            var relevant = {};
            var keys = Object.keys(_changes);

            for (var i = 0; i < keys.length; i++) {
              var change = _changes[keys[i]];

              if (change.head && change.head.geometry(head) !== 'vertex') {
                addEntity(change.head, head, change.base ? 'modified' : 'created');
              } else if (change.base && change.base.geometry(base) !== 'vertex') {
                addEntity(change.base, base, 'deleted');
              } else if (change.base && change.head) {
                // modified vertex
                var moved = !fastDeepEqual(change.base.loc, change.head.loc);
                var retagged = !fastDeepEqual(change.base.tags, change.head.tags);

                if (moved) {
                  addParents(change.head);
                }

                if (retagged || moved && change.head.hasInterestingTags()) {
                  addEntity(change.head, head, 'modified');
                }
              } else if (change.head && change.head.hasInterestingTags()) {
                // created vertex
                addEntity(change.head, head, 'created');
              } else if (change.base && change.base.hasInterestingTags()) {
                // deleted vertex
                addEntity(change.base, base, 'deleted');
              }
            }

            return Object.values(relevant);

            function addEntity(entity, graph, changeType) {
              relevant[entity.id] = {
                entity: entity,
                graph: graph,
                changeType: changeType
              };
            }

            function addParents(entity) {
              var parents = head.parentWays(entity);

              for (var j = parents.length - 1; j >= 0; j--) {
                var parent = parents[j];

                if (!(parent.id in relevant)) {
                  addEntity(parent, head, 'modified');
                }
              }
            }
          }; // returns complete set of entities that require a redraw
          //  (optionally within given `extent`)


          _diff.complete = function complete(extent) {
            var result = {};
            var id, change;

            for (id in _changes) {
              change = _changes[id];
              var h = change.head;
              var b = change.base;
              var entity = h || b;
              var i;

              if (extent && (!h || !h.intersects(extent, head)) && (!b || !b.intersects(extent, base))) {
                continue;
              }

              result[id] = h;

              if (entity.type === 'way') {
                var nh = h ? h.nodes : [];
                var nb = b ? b.nodes : [];
                var diff;
                diff = utilArrayDifference(nh, nb);

                for (i = 0; i < diff.length; i++) {
                  result[diff[i]] = head.hasEntity(diff[i]);
                }

                diff = utilArrayDifference(nb, nh);

                for (i = 0; i < diff.length; i++) {
                  result[diff[i]] = head.hasEntity(diff[i]);
                }
              }

              if (entity.type === 'relation' && entity.isMultipolygon()) {
                var mh = h ? h.members.map(function (m) {
                  return m.id;
                }) : [];
                var mb = b ? b.members.map(function (m) {
                  return m.id;
                }) : [];
                var ids = utilArrayUnion(mh, mb);

                for (i = 0; i < ids.length; i++) {
                  var member = head.hasEntity(ids[i]);
                  if (!member) continue; // not downloaded

                  if (extent && !member.intersects(extent, head)) continue; // not visible

                  result[ids[i]] = member;
                }
              }

              addParents(head.parentWays(entity), result);
              addParents(head.parentRelations(entity), result);
            }

            return result;

            function addParents(parents, result) {
              for (var i = 0; i < parents.length; i++) {
                var parent = parents[i];
                if (parent.id in result) continue;
                result[parent.id] = parent;
                addParents(head.parentRelations(parent), result);
              }
            }
          };

          return _diff;
        }

        function coreTree(head) {
          // tree for entities
          var _rtree = new RBush();

          var _bboxes = {}; // maintain a separate tree for granular way segments

          var _segmentsRTree = new RBush();

          var _segmentsBBoxes = {};
          var _segmentsByWayId = {};
          var tree = {};

          function entityBBox(entity) {
            var bbox = entity.extent(head).bbox();
            bbox.id = entity.id;
            _bboxes[entity.id] = bbox;
            return bbox;
          }

          function segmentBBox(segment) {
            var extent = segment.extent(head); // extent can be null if the node entities aren't in the graph for some reason

            if (!extent) return null;
            var bbox = extent.bbox();
            bbox.segment = segment;
            _segmentsBBoxes[segment.id] = bbox;
            return bbox;
          }

          function removeEntity(entity) {
            _rtree.remove(_bboxes[entity.id]);

            delete _bboxes[entity.id];

            if (_segmentsByWayId[entity.id]) {
              _segmentsByWayId[entity.id].forEach(function (segment) {
                _segmentsRTree.remove(_segmentsBBoxes[segment.id]);

                delete _segmentsBBoxes[segment.id];
              });

              delete _segmentsByWayId[entity.id];
            }
          }

          function loadEntities(entities) {
            _rtree.load(entities.map(entityBBox));

            var segments = [];
            entities.forEach(function (entity) {
              if (entity.segments) {
                var entitySegments = entity.segments(head); // cache these to make them easy to remove later

                _segmentsByWayId[entity.id] = entitySegments;
                segments = segments.concat(entitySegments);
              }
            });
            if (segments.length) _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean));
          }

          function updateParents(entity, insertions, memo) {
            head.parentWays(entity).forEach(function (way) {
              if (_bboxes[way.id]) {
                removeEntity(way);
                insertions[way.id] = way;
              }

              updateParents(way, insertions, memo);
            });
            head.parentRelations(entity).forEach(function (relation) {
              if (memo[entity.id]) return;
              memo[entity.id] = true;

              if (_bboxes[relation.id]) {
                removeEntity(relation);
                insertions[relation.id] = relation;
              }

              updateParents(relation, insertions, memo);
            });
          }

          tree.rebase = function (entities, force) {
            var insertions = {};

            for (var i = 0; i < entities.length; i++) {
              var entity = entities[i];
              if (!entity.visible) continue;

              if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
                if (!force) {
                  continue;
                } else if (_bboxes[entity.id]) {
                  removeEntity(entity);
                }
              }

              insertions[entity.id] = entity;
              updateParents(entity, insertions, {});
            }

            loadEntities(Object.values(insertions));
            return tree;
          };

          function updateToGraph(graph) {
            if (graph === head) return;
            var diff = coreDifference(head, graph);
            head = graph;
            var changed = diff.didChange;
            if (!changed.addition && !changed.deletion && !changed.geometry) return;
            var insertions = {};

            if (changed.deletion) {
              diff.deleted().forEach(function (entity) {
                removeEntity(entity);
              });
            }

            if (changed.geometry) {
              diff.modified().forEach(function (entity) {
                removeEntity(entity);
                insertions[entity.id] = entity;
                updateParents(entity, insertions, {});
              });
            }

            if (changed.addition) {
              diff.created().forEach(function (entity) {
                insertions[entity.id] = entity;
              });
            }

            loadEntities(Object.values(insertions));
          } // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`


          tree.intersects = function (extent, graph) {
            updateToGraph(graph);
            return _rtree.search(extent.bbox()).map(function (bbox) {
              return graph.entity(bbox.id);
            });
          }; // returns an array of segment objects with bounding boxes overlapping `extent` for the given `graph`


          tree.waySegments = function (extent, graph) {
            updateToGraph(graph);
            return _segmentsRTree.search(extent.bbox()).map(function (bbox) {
              return bbox.segment;
            });
          };

          return tree;
        }

        function svgIcon(name, svgklass, useklass) {
          return function drawIcon(selection) {
            selection.selectAll('svg.icon' + (svgklass ? '.' + svgklass.split(' ')[0] : '')).data([0]).enter().append('svg').attr('class', 'icon ' + (svgklass || '')).append('use').attr('xlink:href', name).attr('class', useklass);
          };
        }

        function uiModal(selection, blocking) {
          var _this = this;

          var keybinding = utilKeybinding('modal');
          var previous = selection.select('div.modal');
          var animate = previous.empty();
          previous.transition().duration(200).style('opacity', 0).remove();
          var shaded = selection.append('div').attr('class', 'shaded').style('opacity', 0);

          shaded.close = function () {
            shaded.transition().duration(200).style('opacity', 0).remove();
            modal.transition().duration(200).style('top', '0px');
            select(document).call(keybinding.unbind);
          };

          var modal = shaded.append('div').attr('class', 'modal fillL');
          modal.append('input').attr('class', 'keytrap keytrap-first').on('focus.keytrap', moveFocusToLast);

          if (!blocking) {
            shaded.on('click.remove-modal', function (d3_event) {
              if (d3_event.target === _this) {
                shaded.close();
              }
            });
            modal.append('button').attr('class', 'close').on('click', shaded.close).call(svgIcon('#iD-icon-close'));
            keybinding.on('⌫', shaded.close).on('⎋', shaded.close);
            select(document).call(keybinding);
          }

          modal.append('div').attr('class', 'content');
          modal.append('input').attr('class', 'keytrap keytrap-last').on('focus.keytrap', moveFocusToFirst);

          if (animate) {
            shaded.transition().style('opacity', 1);
          } else {
            shaded.style('opacity', 1);
          }

          return shaded;

          function moveFocusToFirst() {
            var node = modal // there are additional rules about what's focusable, but this suits our purposes
            .select('a, button, input:not(.keytrap), select, textarea').node();

            if (node) {
              node.focus();
            } else {
              select(this).node().blur();
            }
          }

          function moveFocusToLast() {
            var nodes = modal.selectAll('a, button, input:not(.keytrap), select, textarea').nodes();

            if (nodes.length) {
              nodes[nodes.length - 1].focus();
            } else {
              select(this).node().blur();
            }
          }
        }

        function uiLoading(context) {
          var _modalSelection = select(null);

          var _message = '';
          var _blocking = false;

          var loading = function loading(selection) {
            _modalSelection = uiModal(selection, _blocking);

            var loadertext = _modalSelection.select('.content').classed('loading-modal', true).append('div').attr('class', 'modal-section fillL');

            loadertext.append('img').attr('class', 'loader').attr('src', context.imagePath('loader-white.gif'));
            loadertext.append('h3').html(_message);

            _modalSelection.select('button.close').attr('class', 'hide');

            return loading;
          };

          loading.message = function (val) {
            if (!arguments.length) return _message;
            _message = val;
            return loading;
          };

          loading.blocking = function (val) {
            if (!arguments.length) return _blocking;
            _blocking = val;
            return loading;
          };

          loading.close = function () {
            _modalSelection.remove();
          };

          loading.isShown = function () {
            return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
          };

          return loading;
        }

        function coreHistory(context) {
          var dispatch = dispatch$8('reset', 'change', 'merge', 'restore', 'undone', 'redone');

          var _lock = utilSessionMutex('lock'); // restorable if iD not open in another window/tab and a saved history exists in localStorage


          var _hasUnresolvedRestorableChanges = _lock.lock() && !!corePreferences(getKey('saved_history'));

          var duration = 150;
          var _imageryUsed = [];
          var _photoOverlaysUsed = [];
          var _checkpoints = {};

          var _pausedGraph;

          var _stack;

          var _index;

          var _tree; // internal _act, accepts list of actions and eased time


          function _act(actions, t) {
            actions = Array.prototype.slice.call(actions);
            var annotation;

            if (typeof actions[actions.length - 1] !== 'function') {
              annotation = actions.pop();
            }

            var graph = _stack[_index].graph;

            for (var i = 0; i < actions.length; i++) {
              graph = actions[i](graph, t);
            }

            return {
              graph: graph,
              annotation: annotation,
              imageryUsed: _imageryUsed,
              photoOverlaysUsed: _photoOverlaysUsed,
              transform: context.projection.transform(),
              selectedIDs: context.selectedIDs()
            };
          } // internal _perform with eased time


          function _perform(args, t) {
            var previous = _stack[_index].graph;
            _stack = _stack.slice(0, _index + 1);

            var actionResult = _act(args, t);

            _stack.push(actionResult);

            _index++;
            return change(previous);
          } // internal _replace with eased time


          function _replace(args, t) {
            var previous = _stack[_index].graph; // assert(_index == _stack.length - 1)

            var actionResult = _act(args, t);

            _stack[_index] = actionResult;
            return change(previous);
          } // internal _overwrite with eased time


          function _overwrite(args, t) {
            var previous = _stack[_index].graph;

            if (_index > 0) {
              _index--;

              _stack.pop();
            }

            _stack = _stack.slice(0, _index + 1);

            var actionResult = _act(args, t);

            _stack.push(actionResult);

            _index++;
            return change(previous);
          } // determine difference and dispatch a change event


          function change(previous) {
            var difference = coreDifference(previous, history.graph());

            if (!_pausedGraph) {
              dispatch.call('change', this, difference);
            }

            return difference;
          } // iD uses namespaced keys so multiple installations do not conflict


          function getKey(n) {
            return 'iD_' + window.location.origin + '_' + n;
          }

          var history = {
            graph: function graph() {
              return _stack[_index].graph;
            },
            tree: function tree() {
              return _tree;
            },
            base: function base() {
              return _stack[0].graph;
            },
            merge: function merge(entities
            /*, extent*/
            ) {
              var stack = _stack.map(function (state) {
                return state.graph;
              });

              _stack[0].graph.rebase(entities, stack, false);

              _tree.rebase(entities, false);

              dispatch.call('merge', this, entities);
            },
            perform: function perform() {
              // complete any transition already in progress
              select(document).interrupt('history.perform');
              var transitionable = false;
              var action0 = arguments[0];

              if (arguments.length === 1 || arguments.length === 2 && typeof arguments[1] !== 'function') {
                transitionable = !!action0.transitionable;
              }

              if (transitionable) {
                var origArguments = arguments;
                select(document).transition('history.perform').duration(duration).ease(linear$1).tween('history.tween', function () {
                  return function (t) {
                    if (t < 1) _overwrite([action0], t);
                  };
                }).on('start', function () {
                  _perform([action0], 0);
                }).on('end interrupt', function () {
                  _overwrite(origArguments, 1);
                });
              } else {
                return _perform(arguments);
              }
            },
            replace: function replace() {
              select(document).interrupt('history.perform');
              return _replace(arguments, 1);
            },
            // Same as calling pop and then perform
            overwrite: function overwrite() {
              select(document).interrupt('history.perform');
              return _overwrite(arguments, 1);
            },
            pop: function pop(n) {
              select(document).interrupt('history.perform');
              var previous = _stack[_index].graph;

              if (isNaN(+n) || +n < 0) {
                n = 1;
              }

              while (n-- > 0 && _index > 0) {
                _index--;

                _stack.pop();
              }

              return change(previous);
            },
            // Back to the previous annotated state or _index = 0.
            undo: function undo() {
              select(document).interrupt('history.perform');
              var previousStack = _stack[_index];
              var previous = previousStack.graph;

              while (_index > 0) {
                _index--;
                if (_stack[_index].annotation) break;
              }

              dispatch.call('undone', this, _stack[_index], previousStack);
              return change(previous);
            },
            // Forward to the next annotated state.
            redo: function redo() {
              select(document).interrupt('history.perform');
              var previousStack = _stack[_index];
              var previous = previousStack.graph;
              var tryIndex = _index;

              while (tryIndex < _stack.length - 1) {
                tryIndex++;

                if (_stack[tryIndex].annotation) {
                  _index = tryIndex;
                  dispatch.call('redone', this, _stack[_index], previousStack);
                  break;
                }
              }

              return change(previous);
            },
            pauseChangeDispatch: function pauseChangeDispatch() {
              if (!_pausedGraph) {
                _pausedGraph = _stack[_index].graph;
              }
            },
            resumeChangeDispatch: function resumeChangeDispatch() {
              if (_pausedGraph) {
                var previous = _pausedGraph;
                _pausedGraph = null;
                return change(previous);
              }
            },
            undoAnnotation: function undoAnnotation() {
              var i = _index;

              while (i >= 0) {
                if (_stack[i].annotation) return _stack[i].annotation;
                i--;
              }
            },
            redoAnnotation: function redoAnnotation() {
              var i = _index + 1;

              while (i <= _stack.length - 1) {
                if (_stack[i].annotation) return _stack[i].annotation;
                i++;
              }
            },
            // Returns the entities from the active graph with bounding boxes
            // overlapping the given `extent`.
            intersects: function intersects(extent) {
              return _tree.intersects(extent, _stack[_index].graph);
            },
            difference: function difference() {
              var base = _stack[0].graph;
              var head = _stack[_index].graph;
              return coreDifference(base, head);
            },
            changes: function changes(action) {
              var base = _stack[0].graph;
              var head = _stack[_index].graph;

              if (action) {
                head = action(head);
              }

              var difference = coreDifference(base, head);
              return {
                modified: difference.modified(),
                created: difference.created(),
                deleted: difference.deleted()
              };
            },
            hasChanges: function hasChanges() {
              return this.difference().length() > 0;
            },
            imageryUsed: function imageryUsed(sources) {
              if (sources) {
                _imageryUsed = sources;
                return history;
              } else {
                var s = new Set();

                _stack.slice(1, _index + 1).forEach(function (state) {
                  state.imageryUsed.forEach(function (source) {
                    if (source !== 'Custom') {
                      s.add(source);
                    }
                  });
                });

                return Array.from(s);
              }
            },
            photoOverlaysUsed: function photoOverlaysUsed(sources) {
              if (sources) {
                _photoOverlaysUsed = sources;
                return history;
              } else {
                var s = new Set();

                _stack.slice(1, _index + 1).forEach(function (state) {
                  if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
                    state.photoOverlaysUsed.forEach(function (photoOverlay) {
                      s.add(photoOverlay);
                    });
                  }
                });

                return Array.from(s);
              }
            },
            // save the current history state
            checkpoint: function checkpoint(key) {
              _checkpoints[key] = {
                stack: _stack,
                index: _index
              };
              return history;
            },
            // restore history state to a given checkpoint or reset completely
            reset: function reset(key) {
              if (key !== undefined && _checkpoints.hasOwnProperty(key)) {
                _stack = _checkpoints[key].stack;
                _index = _checkpoints[key].index;
              } else {
                _stack = [{
                  graph: coreGraph()
                }];
                _index = 0;
                _tree = coreTree(_stack[0].graph);
                _checkpoints = {};
              }

              dispatch.call('reset');
              dispatch.call('change');
              return history;
            },
            // `toIntroGraph()` is used to export the intro graph used by the walkthrough.
            //
            // To use it:
            //  1. Start the walkthrough.
            //  2. Get to a "free editing" tutorial step
            //  3. Make your edits to the walkthrough map
            //  4. In your browser dev console run:
            //        `id.history().toIntroGraph()`
            //  5. This outputs stringified JSON to the browser console
            //  6. Copy it to `data/intro_graph.json` and prettify it in your code editor
            toIntroGraph: function toIntroGraph() {
              var nextID = {
                n: 0,
                r: 0,
                w: 0
              };
              var permIDs = {};
              var graph = this.graph();
              var baseEntities = {}; // clone base entities..

              Object.values(graph.base().entities).forEach(function (entity) {
                var copy = copyIntroEntity(entity);
                baseEntities[copy.id] = copy;
              }); // replace base entities with head entities..

              Object.keys(graph.entities).forEach(function (id) {
                var entity = graph.entities[id];

                if (entity) {
                  var copy = copyIntroEntity(entity);
                  baseEntities[copy.id] = copy;
                } else {
                  delete baseEntities[id];
                }
              }); // swap temporary for permanent ids..

              Object.values(baseEntities).forEach(function (entity) {
                if (Array.isArray(entity.nodes)) {
                  entity.nodes = entity.nodes.map(function (node) {
                    return permIDs[node] || node;
                  });
                }

                if (Array.isArray(entity.members)) {
                  entity.members = entity.members.map(function (member) {
                    member.id = permIDs[member.id] || member.id;
                    return member;
                  });
                }
              });
              return JSON.stringify({
                dataIntroGraph: baseEntities
              });

              function copyIntroEntity(source) {
                var copy = utilObjectOmit(source, ['type', 'user', 'v', 'version', 'visible']); // Note: the copy is no longer an osmEntity, so it might not have `tags`

                if (copy.tags && !Object.keys(copy.tags)) {
                  delete copy.tags;
                }

                if (Array.isArray(copy.loc)) {
                  copy.loc[0] = +copy.loc[0].toFixed(6);
                  copy.loc[1] = +copy.loc[1].toFixed(6);
                }

                var match = source.id.match(/([nrw])-\d*/); // temporary id

                if (match !== null) {
                  var nrw = match[1];
                  var permID;

                  do {
                    permID = nrw + ++nextID[nrw];
                  } while (baseEntities.hasOwnProperty(permID));

                  copy.id = permIDs[source.id] = permID;
                }

                return copy;
              }
            },
            toJSON: function toJSON() {
              if (!this.hasChanges()) return;
              var allEntities = {};
              var baseEntities = {};
              var base = _stack[0];

              var s = _stack.map(function (i) {
                var modified = [];
                var deleted = [];
                Object.keys(i.graph.entities).forEach(function (id) {
                  var entity = i.graph.entities[id];

                  if (entity) {
                    var key = osmEntity.key(entity);
                    allEntities[key] = entity;
                    modified.push(key);
                  } else {
                    deleted.push(id);
                  } // make sure that the originals of changed or deleted entities get merged
                  // into the base of the _stack after restoring the data from JSON.


                  if (id in base.graph.entities) {
                    baseEntities[id] = base.graph.entities[id];
                  }

                  if (entity && entity.nodes) {
                    // get originals of pre-existing child nodes
                    entity.nodes.forEach(function (nodeID) {
                      if (nodeID in base.graph.entities) {
                        baseEntities[nodeID] = base.graph.entities[nodeID];
                      }
                    });
                  } // get originals of parent entities too


                  var baseParents = base.graph._parentWays[id];

                  if (baseParents) {
                    baseParents.forEach(function (parentID) {
                      if (parentID in base.graph.entities) {
                        baseEntities[parentID] = base.graph.entities[parentID];
                      }
                    });
                  }
                });
                var x = {};
                if (modified.length) x.modified = modified;
                if (deleted.length) x.deleted = deleted;
                if (i.imageryUsed) x.imageryUsed = i.imageryUsed;
                if (i.photoOverlaysUsed) x.photoOverlaysUsed = i.photoOverlaysUsed;
                if (i.annotation) x.annotation = i.annotation;
                if (i.transform) x.transform = i.transform;
                if (i.selectedIDs) x.selectedIDs = i.selectedIDs;
                return x;
              });

              return JSON.stringify({
                version: 3,
                entities: Object.values(allEntities),
                baseEntities: Object.values(baseEntities),
                stack: s,
                nextIDs: osmEntity.id.next,
                index: _index,
                // note the time the changes were saved
                timestamp: new Date().getTime()
              });
            },
            fromJSON: function fromJSON(json, loadChildNodes) {
              var h = JSON.parse(json);
              var loadComplete = true;
              osmEntity.id.next = h.nextIDs;
              _index = h.index;

              if (h.version === 2 || h.version === 3) {
                var allEntities = {};
                h.entities.forEach(function (entity) {
                  allEntities[osmEntity.key(entity)] = osmEntity(entity);
                });

                if (h.version === 3) {
                  // This merges originals for changed entities into the base of
                  // the _stack even if the current _stack doesn't have them (for
                  // example when iD has been restarted in a different region)
                  var baseEntities = h.baseEntities.map(function (d) {
                    return osmEntity(d);
                  });

                  var stack = _stack.map(function (state) {
                    return state.graph;
                  });

                  _stack[0].graph.rebase(baseEntities, stack, true);

                  _tree.rebase(baseEntities, true); // When we restore a modified way, we also need to fetch any missing
                  // childnodes that would normally have been downloaded with it.. #2142


                  if (loadChildNodes) {
                    var osm = context.connection();
                    var baseWays = baseEntities.filter(function (e) {
                      return e.type === 'way';
                    });
                    var nodeIDs = baseWays.reduce(function (acc, way) {
                      return utilArrayUnion(acc, way.nodes);
                    }, []);
                    var missing = nodeIDs.filter(function (n) {
                      return !_stack[0].graph.hasEntity(n);
                    });

                    if (missing.length && osm) {
                      loadComplete = false;
                      context.map().redrawEnable(false);
                      var loading = uiLoading(context).blocking(true);
                      context.container().call(loading);

                      var childNodesLoaded = function childNodesLoaded(err, result) {
                        if (!err) {
                          var visibleGroups = utilArrayGroupBy(result.data, 'visible');
                          var visibles = visibleGroups["true"] || []; // alive nodes

                          var invisibles = visibleGroups["false"] || []; // deleted nodes

                          if (visibles.length) {
                            var visibleIDs = visibles.map(function (entity) {
                              return entity.id;
                            });

                            var stack = _stack.map(function (state) {
                              return state.graph;
                            });

                            missing = utilArrayDifference(missing, visibleIDs);

                            _stack[0].graph.rebase(visibles, stack, true);

                            _tree.rebase(visibles, true);
                          } // fetch older versions of nodes that were deleted..


                          invisibles.forEach(function (entity) {
                            osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
                          });
                        }

                        if (err || !missing.length) {
                          loading.close();
                          context.map().redrawEnable(true);
                          dispatch.call('change');
                          dispatch.call('restore', this);
                        }
                      };

                      osm.loadMultiple(missing, childNodesLoaded);
                    }
                  }
                }

                _stack = h.stack.map(function (d) {
                  var entities = {},
                      entity;

                  if (d.modified) {
                    d.modified.forEach(function (key) {
                      entity = allEntities[key];
                      entities[entity.id] = entity;
                    });
                  }

                  if (d.deleted) {
                    d.deleted.forEach(function (id) {
                      entities[id] = undefined;
                    });
                  }

                  return {
                    graph: coreGraph(_stack[0].graph).load(entities),
                    annotation: d.annotation,
                    imageryUsed: d.imageryUsed,
                    photoOverlaysUsed: d.photoOverlaysUsed,
                    transform: d.transform,
                    selectedIDs: d.selectedIDs
                  };
                });
              } else {
                // original version
                _stack = h.stack.map(function (d) {
                  var entities = {};

                  for (var i in d.entities) {
                    var entity = d.entities[i];
                    entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
                  }

                  d.graph = coreGraph(_stack[0].graph).load(entities);
                  return d;
                });
              }

              var transform = _stack[_index].transform;

              if (transform) {
                context.map().transformEase(transform, 0); // 0 = immediate, no easing
              }

              if (loadComplete) {
                dispatch.call('change');
                dispatch.call('restore', this);
              }

              return history;
            },
            lock: function lock() {
              return _lock.lock();
            },
            unlock: function unlock() {
              _lock.unlock();
            },
            save: function save() {
              if (_lock.locked() && // don't overwrite existing, unresolved changes
              !_hasUnresolvedRestorableChanges) {
                corePreferences(getKey('saved_history'), history.toJSON() || null);
              }

              return history;
            },
            // delete the history version saved in localStorage
            clearSaved: function clearSaved() {
              context.debouncedSave.cancel();

              if (_lock.locked()) {
                _hasUnresolvedRestorableChanges = false;
                corePreferences(getKey('saved_history'), null); // clear the changeset metadata associated with the saved history

                corePreferences('comment', null);
                corePreferences('hashtags', null);
                corePreferences('source', null);
              }

              return history;
            },
            savedHistoryJSON: function savedHistoryJSON() {
              return corePreferences(getKey('saved_history'));
            },
            hasRestorableChanges: function hasRestorableChanges() {
              return _hasUnresolvedRestorableChanges;
            },
            // load history from a version stored in localStorage
            restore: function restore() {
              if (_lock.locked()) {
                _hasUnresolvedRestorableChanges = false;
                var json = this.savedHistoryJSON();
                if (json) history.fromJSON(json, true);
              }
            },
            _getKey: getKey
          };
          history.reset();
          return utilRebind(history, dispatch, 'on');
        }

        /**
         * Look for roads that can be connected to other roads with a short extension
         */

        function validationAlmostJunction(context) {
          var type = 'almost_junction';
          var EXTEND_TH_METERS = 5;
          var WELD_TH_METERS = 0.75; // Comes from considering bounding case of parallel ways

          var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS; // Comes from considering bounding case of perpendicular ways

          var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);

          function isHighway(entity) {
            return entity.type === 'way' && osmRoutableHighwayTagValues[entity.tags.highway];
          }

          function isTaggedAsNotContinuing(node) {
            return node.tags.noexit === 'yes' || node.tags.amenity === 'parking_entrance' || node.tags.entrance && node.tags.entrance !== 'no';
          }

          var validation = function checkAlmostJunction(entity, graph) {
            if (!isHighway(entity)) return [];
            if (entity.isDegenerate()) return [];
            var tree = context.history().tree();
            var extendableNodeInfos = findConnectableEndNodesByExtension(entity);
            var issues = [];
            extendableNodeInfos.forEach(function (extendableNodeInfo) {
              issues.push(new validationIssue({
                type: type,
                subtype: 'highway-highway',
                severity: 'warning',
                message: function message(context) {
                  var entity1 = context.hasEntity(this.entityIds[0]);

                  if (this.entityIds[0] === this.entityIds[2]) {
                    return entity1 ? _t.html('issues.almost_junction.self.message', {
                      feature: utilDisplayLabel(entity1, context.graph())
                    }) : '';
                  } else {
                    var entity2 = context.hasEntity(this.entityIds[2]);
                    return entity1 && entity2 ? _t.html('issues.almost_junction.message', {
                      feature: utilDisplayLabel(entity1, context.graph()),
                      feature2: utilDisplayLabel(entity2, context.graph())
                    }) : '';
                  }
                },
                reference: showReference,
                entityIds: [entity.id, extendableNodeInfo.node.id, extendableNodeInfo.wid],
                loc: extendableNodeInfo.node.loc,
                hash: JSON.stringify(extendableNodeInfo.node.loc),
                data: {
                  midId: extendableNodeInfo.mid.id,
                  edge: extendableNodeInfo.edge,
                  cross_loc: extendableNodeInfo.cross_loc
                },
                dynamicFixes: makeFixes
              }));
            });
            return issues;

            function makeFixes(context) {
              var fixes = [new validationIssueFix({
                icon: 'iD-icon-abutment',
                title: _t.html('issues.fix.connect_features.title'),
                onClick: function onClick(context) {
                  var annotation = _t('issues.fix.connect_almost_junction.annotation');

                  var _this$issue$entityIds = _slicedToArray(this.issue.entityIds, 3),
                      endNodeId = _this$issue$entityIds[1],
                      crossWayId = _this$issue$entityIds[2];

                  var midNode = context.entity(this.issue.data.midId);
                  var endNode = context.entity(endNodeId);
                  var crossWay = context.entity(crossWayId); // When endpoints are close, just join if resulting small change in angle (#7201)

                  var nearEndNodes = findNearbyEndNodes(endNode, crossWay);

                  if (nearEndNodes.length > 0) {
                    var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);

                    if (collinear) {
                      context.perform(actionMergeNodes([collinear.id, endNode.id], collinear.loc), annotation);
                      return;
                    }
                  }

                  var targetEdge = this.issue.data.edge;
                  var crossLoc = this.issue.data.cross_loc;
                  var edgeNodes = [context.entity(targetEdge[0]), context.entity(targetEdge[1])];
                  var closestNodeInfo = geoSphericalClosestNode(edgeNodes, crossLoc); // already a point nearby, just connect to that

                  if (closestNodeInfo.distance < WELD_TH_METERS) {
                    context.perform(actionMergeNodes([closestNodeInfo.node.id, endNode.id], closestNodeInfo.node.loc), annotation); // else add the end node to the edge way
                  } else {
                    context.perform(actionAddMidpoint({
                      loc: crossLoc,
                      edge: targetEdge
                    }, endNode), annotation);
                  }
                }
              })];
              var node = context.hasEntity(this.entityIds[1]);

              if (node && !node.hasInterestingTags()) {
                // node has no descriptive tags, suggest noexit fix
                fixes.push(new validationIssueFix({
                  icon: 'maki-barrier',
                  title: _t.html('issues.fix.tag_as_disconnected.title'),
                  onClick: function onClick(context) {
                    var nodeID = this.issue.entityIds[1];
                    var tags = Object.assign({}, context.entity(nodeID).tags);
                    tags.noexit = 'yes';
                    context.perform(actionChangeTags(nodeID, tags), _t('issues.fix.tag_as_disconnected.annotation'));
                  }
                }));
              }

              return fixes;
            }

            function showReference(selection) {
              selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.almost_junction.highway-highway.reference'));
            }

            function isExtendableCandidate(node, way) {
              // can not accurately test vertices on tiles not downloaded from osm - #5938
              var osm = services.osm;

              if (osm && !osm.isDataLoaded(node.loc)) {
                return false;
              }

              if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
                return false;
              }

              var occurrences = 0;

              for (var index in way.nodes) {
                if (way.nodes[index] === node.id) {
                  occurrences += 1;

                  if (occurrences > 1) {
                    return false;
                  }
                }
              }

              return true;
            }

            function findConnectableEndNodesByExtension(way) {
              var results = [];
              if (way.isClosed()) return results;
              var testNodes;
              var indices = [0, way.nodes.length - 1];
              indices.forEach(function (nodeIndex) {
                var nodeID = way.nodes[nodeIndex];
                var node = graph.entity(nodeID);
                if (!isExtendableCandidate(node, way)) return;
                var connectionInfo = canConnectByExtend(way, nodeIndex);
                if (!connectionInfo) return;
                testNodes = graph.childNodes(way).slice(); // shallow copy

                testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc); // don't flag issue if connecting the ways would cause self-intersection

                if (geoHasSelfIntersections(testNodes, nodeID)) return;
                results.push(connectionInfo);
              });
              return results;
            }

            function findNearbyEndNodes(node, way) {
              return [way.nodes[0], way.nodes[way.nodes.length - 1]].map(function (d) {
                return graph.entity(d);
              }).filter(function (d) {
                // Node cannot be near to itself, but other endnode of same way could be
                return d.id !== node.id && geoSphericalDistance(node.loc, d.loc) <= CLOSE_NODE_TH;
              });
            }

            function findSmallJoinAngle(midNode, tipNode, endNodes) {
              // Both nodes could be close, so want to join whichever is closest to collinear
              var joinTo;
              var minAngle = Infinity; // Checks midNode -> tipNode -> endNode for collinearity

              endNodes.forEach(function (endNode) {
                var a1 = geoAngle(midNode, tipNode, context.projection) + Math.PI;
                var a2 = geoAngle(midNode, endNode, context.projection) + Math.PI;
                var diff = Math.max(a1, a2) - Math.min(a1, a2);

                if (diff < minAngle) {
                  joinTo = endNode;
                  minAngle = diff;
                }
              });
              /* Threshold set by considering right angle triangle
              based on node joining threshold and extension distance */

              if (minAngle <= SIG_ANGLE_TH) return joinTo;
              return null;
            }

            function hasTag(tags, key) {
              return tags[key] !== undefined && tags[key] !== 'no';
            }

            function canConnectWays(way, way2) {
              // allow self-connections
              if (way.id === way2.id) return true; // if one is bridge or tunnel, both must be bridge or tunnel

              if ((hasTag(way.tags, 'bridge') || hasTag(way2.tags, 'bridge')) && !(hasTag(way.tags, 'bridge') && hasTag(way2.tags, 'bridge'))) return false;
              if ((hasTag(way.tags, 'tunnel') || hasTag(way2.tags, 'tunnel')) && !(hasTag(way.tags, 'tunnel') && hasTag(way2.tags, 'tunnel'))) return false; // must have equivalent layers and levels

              var layer1 = way.tags.layer || '0',
                  layer2 = way2.tags.layer || '0';
              if (layer1 !== layer2) return false;
              var level1 = way.tags.level || '0',
                  level2 = way2.tags.level || '0';
              if (level1 !== level2) return false;
              return true;
            }

            function canConnectByExtend(way, endNodeIdx) {
              var tipNid = way.nodes[endNodeIdx]; // the 'tip' node for extension point

              var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2]; // the other node of the edge

              var tipNode = graph.entity(tipNid);
              var midNode = graph.entity(midNid);
              var lon = tipNode.loc[0];
              var lat = tipNode.loc[1];
              var lon_range = geoMetersToLon(EXTEND_TH_METERS, lat) / 2;
              var lat_range = geoMetersToLat(EXTEND_TH_METERS) / 2;
              var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]); // first, extend the edge of [midNode -> tipNode] by EXTEND_TH_METERS and find the "extended tip" location

              var edgeLen = geoSphericalDistance(midNode.loc, tipNode.loc);
              var t = EXTEND_TH_METERS / edgeLen + 1.0;
              var extTipLoc = geoVecInterp(midNode.loc, tipNode.loc, t); // then, check if the extension part [tipNode.loc -> extTipLoc] intersects any other ways

              var segmentInfos = tree.waySegments(queryExtent, graph);

              for (var i = 0; i < segmentInfos.length; i++) {
                var segmentInfo = segmentInfos[i];
                var way2 = graph.entity(segmentInfo.wayId);
                if (!isHighway(way2)) continue;
                if (!canConnectWays(way, way2)) continue;
                var nAid = segmentInfo.nodes[0],
                    nBid = segmentInfo.nodes[1];
                if (nAid === tipNid || nBid === tipNid) continue;
                var nA = graph.entity(nAid),
                    nB = graph.entity(nBid);
                var crossLoc = geoLineIntersection([tipNode.loc, extTipLoc], [nA.loc, nB.loc]);

                if (crossLoc) {
                  return {
                    mid: midNode,
                    node: tipNode,
                    wid: way2.id,
                    edge: [nA.id, nB.id],
                    cross_loc: crossLoc
                  };
                }
              }

              return null;
            }
          };

          validation.type = type;
          return validation;
        }

        function validationCloseNodes(context) {
          var type = 'close_nodes';
          var pointThresholdMeters = 0.2;

          var validation = function validation(entity, graph) {
            if (entity.type === 'node') {
              return getIssuesForNode(entity);
            } else if (entity.type === 'way') {
              return getIssuesForWay(entity);
            }

            return [];

            function getIssuesForNode(node) {
              var parentWays = graph.parentWays(node);

              if (parentWays.length) {
                return getIssuesForVertex(node, parentWays);
              } else {
                return getIssuesForDetachedPoint(node);
              }
            }

            function wayTypeFor(way) {
              if (way.tags.boundary && way.tags.boundary !== 'no') return 'boundary';
              if (way.tags.indoor && way.tags.indoor !== 'no') return 'indoor';
              if (way.tags.building && way.tags.building !== 'no' || way.tags['building:part'] && way.tags['building:part'] !== 'no') return 'building';
              if (osmPathHighwayTagValues[way.tags.highway]) return 'path';
              var parentRelations = graph.parentRelations(way);

              for (var i in parentRelations) {
                var relation = parentRelations[i];
                if (relation.tags.type === 'boundary') return 'boundary';

                if (relation.isMultipolygon()) {
                  if (relation.tags.indoor && relation.tags.indoor !== 'no') return 'indoor';
                  if (relation.tags.building && relation.tags.building !== 'no' || relation.tags['building:part'] && relation.tags['building:part'] !== 'no') return 'building';
                }
              }

              return 'other';
            }

            function shouldCheckWay(way) {
              // don't flag issues where merging would create degenerate ways
              if (way.nodes.length <= 2 || way.isClosed() && way.nodes.length <= 4) return false;
              var bbox = way.extent(graph).bbox();
              var hypotenuseMeters = geoSphericalDistance([bbox.minX, bbox.minY], [bbox.maxX, bbox.maxY]); // don't flag close nodes in very small ways

              if (hypotenuseMeters < 1.5) return false;
              return true;
            }

            function getIssuesForWay(way) {
              if (!shouldCheckWay(way)) return [];
              var issues = [],
                  nodes = graph.childNodes(way);

              for (var i = 0; i < nodes.length - 1; i++) {
                var node1 = nodes[i];
                var node2 = nodes[i + 1];
                var issue = getWayIssueIfAny(node1, node2, way);
                if (issue) issues.push(issue);
              }

              return issues;
            }

            function getIssuesForVertex(node, parentWays) {
              var issues = [];

              function checkForCloseness(node1, node2, way) {
                var issue = getWayIssueIfAny(node1, node2, way);
                if (issue) issues.push(issue);
              }

              for (var i = 0; i < parentWays.length; i++) {
                var parentWay = parentWays[i];
                if (!shouldCheckWay(parentWay)) continue;
                var lastIndex = parentWay.nodes.length - 1;

                for (var j = 0; j < parentWay.nodes.length; j++) {
                  if (j !== 0) {
                    if (parentWay.nodes[j - 1] === node.id) {
                      checkForCloseness(node, graph.entity(parentWay.nodes[j]), parentWay);
                    }
                  }

                  if (j !== lastIndex) {
                    if (parentWay.nodes[j + 1] === node.id) {
                      checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
                    }
                  }
                }
              }

              return issues;
            }

            function thresholdMetersForWay(way) {
              if (!shouldCheckWay(way)) return 0;
              var wayType = wayTypeFor(way); // don't flag boundaries since they might be highly detailed and can't be easily verified

              if (wayType === 'boundary') return 0; // expect some features to be mapped with higher levels of detail

              if (wayType === 'indoor') return 0.01;
              if (wayType === 'building') return 0.05;
              if (wayType === 'path') return 0.1;
              return 0.2;
            }

            function getIssuesForDetachedPoint(node) {
              var issues = [];
              var lon = node.loc[0];
              var lat = node.loc[1];
              var lon_range = geoMetersToLon(pointThresholdMeters, lat) / 2;
              var lat_range = geoMetersToLat(pointThresholdMeters) / 2;
              var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]);
              var intersected = context.history().tree().intersects(queryExtent, graph);

              for (var j = 0; j < intersected.length; j++) {
                var nearby = intersected[j];
                if (nearby.id === node.id) continue;
                if (nearby.type !== 'node' || nearby.geometry(graph) !== 'point') continue;

                if (nearby.loc === node.loc || geoSphericalDistance(node.loc, nearby.loc) < pointThresholdMeters) {
                  // allow very close points if tags indicate the z-axis might vary
                  var zAxisKeys = {
                    layer: true,
                    level: true,
                    'addr:housenumber': true,
                    'addr:unit': true
                  };
                  var zAxisDifferentiates = false;

                  for (var key in zAxisKeys) {
                    var nodeValue = node.tags[key] || '0';
                    var nearbyValue = nearby.tags[key] || '0';

                    if (nodeValue !== nearbyValue) {
                      zAxisDifferentiates = true;
                      break;
                    }
                  }

                  if (zAxisDifferentiates) continue;
                  issues.push(new validationIssue({
                    type: type,
                    subtype: 'detached',
                    severity: 'warning',
                    message: function message(context) {
                      var entity = context.hasEntity(this.entityIds[0]),
                          entity2 = context.hasEntity(this.entityIds[1]);
                      return entity && entity2 ? _t.html('issues.close_nodes.detached.message', {
                        feature: utilDisplayLabel(entity, context.graph()),
                        feature2: utilDisplayLabel(entity2, context.graph())
                      }) : '';
                    },
                    reference: showReference,
                    entityIds: [node.id, nearby.id],
                    dynamicFixes: function dynamicFixes() {
                      return [new validationIssueFix({
                        icon: 'iD-operation-disconnect',
                        title: _t.html('issues.fix.move_points_apart.title')
                      }), new validationIssueFix({
                        icon: 'iD-icon-layers',
                        title: _t.html('issues.fix.use_different_layers_or_levels.title')
                      })];
                    }
                  }));
                }
              }

              return issues;

              function showReference(selection) {
                var referenceText = _t('issues.close_nodes.detached.reference');
                selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
              }
            }

            function getWayIssueIfAny(node1, node2, way) {
              if (node1.id === node2.id || node1.hasInterestingTags() && node2.hasInterestingTags()) {
                return null;
              }

              if (node1.loc !== node2.loc) {
                var parentWays1 = graph.parentWays(node1);
                var parentWays2 = new Set(graph.parentWays(node2));
                var sharedWays = parentWays1.filter(function (parentWay) {
                  return parentWays2.has(parentWay);
                });
                var thresholds = sharedWays.map(function (parentWay) {
                  return thresholdMetersForWay(parentWay);
                });
                var threshold = Math.min.apply(Math, _toConsumableArray(thresholds));
                var distance = geoSphericalDistance(node1.loc, node2.loc);
                if (distance > threshold) return null;
              }

              return new validationIssue({
                type: type,
                subtype: 'vertices',
                severity: 'warning',
                message: function message(context) {
                  var entity = context.hasEntity(this.entityIds[0]);
                  return entity ? _t.html('issues.close_nodes.message', {
                    way: utilDisplayLabel(entity, context.graph())
                  }) : '';
                },
                reference: showReference,
                entityIds: [way.id, node1.id, node2.id],
                loc: node1.loc,
                dynamicFixes: function dynamicFixes() {
                  return [new validationIssueFix({
                    icon: 'iD-icon-plus',
                    title: _t.html('issues.fix.merge_points.title'),
                    onClick: function onClick(context) {
                      var entityIds = this.issue.entityIds;
                      var action = actionMergeNodes([entityIds[1], entityIds[2]]);
                      context.perform(action, _t('issues.fix.merge_close_vertices.annotation'));
                    }
                  }), new validationIssueFix({
                    icon: 'iD-operation-disconnect',
                    title: _t.html('issues.fix.move_points_apart.title')
                  })];
                }
              });

              function showReference(selection) {
                var referenceText = _t('issues.close_nodes.reference');
                selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
              }
            }
          };

          validation.type = type;
          return validation;
        }

        function validationCrossingWays(context) {
          var type = 'crossing_ways'; // returns the way or its parent relation, whichever has a useful feature type

          function getFeatureWithFeatureTypeTagsForWay(way, graph) {
            if (getFeatureType(way, graph) === null) {
              // if the way doesn't match a feature type, check its parent relations
              var parentRels = graph.parentRelations(way);

              for (var i = 0; i < parentRels.length; i++) {
                var rel = parentRels[i];

                if (getFeatureType(rel, graph) !== null) {
                  return rel;
                }
              }
            }

            return way;
          }

          function hasTag(tags, key) {
            return tags[key] !== undefined && tags[key] !== 'no';
          }

          function taggedAsIndoor(tags) {
            return hasTag(tags, 'indoor') || hasTag(tags, 'level') || tags.highway === 'corridor';
          }

          function allowsBridge(featureType) {
            return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
          }

          function allowsTunnel(featureType) {
            return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
          } // discard


          var ignoredBuildings = {
            demolished: true,
            dismantled: true,
            proposed: true,
            razed: true
          };

          function getFeatureType(entity, graph) {
            var geometry = entity.geometry(graph);
            if (geometry !== 'line' && geometry !== 'area') return null;
            var tags = entity.tags;
            if (hasTag(tags, 'building') && !ignoredBuildings[tags.building]) return 'building';
            if (hasTag(tags, 'highway') && osmRoutableHighwayTagValues[tags.highway]) return 'highway'; // don't check railway or waterway areas

            if (geometry !== 'line') return null;
            if (hasTag(tags, 'railway') && osmRailwayTrackTagValues[tags.railway]) return 'railway';
            if (hasTag(tags, 'waterway') && osmFlowingWaterwayTagValues[tags.waterway]) return 'waterway';
            return null;
          }

          function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
            // assume 0 by default
            var level1 = tags1.level || '0';
            var level2 = tags2.level || '0';

            if (taggedAsIndoor(tags1) && taggedAsIndoor(tags2) && level1 !== level2) {
              // assume features don't interact if they're indoor on different levels
              return true;
            } // assume 0 by default; don't use way.layer() since we account for structures here


            var layer1 = tags1.layer || '0';
            var layer2 = tags2.layer || '0';

            if (allowsBridge(featureType1) && allowsBridge(featureType2)) {
              if (hasTag(tags1, 'bridge') && !hasTag(tags2, 'bridge')) return true;
              if (!hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge')) return true; // crossing bridges must use different layers

              if (hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge') && layer1 !== layer2) return true;
            } else if (allowsBridge(featureType1) && hasTag(tags1, 'bridge')) return true;else if (allowsBridge(featureType2) && hasTag(tags2, 'bridge')) return true;

            if (allowsTunnel(featureType1) && allowsTunnel(featureType2)) {
              if (hasTag(tags1, 'tunnel') && !hasTag(tags2, 'tunnel')) return true;
              if (!hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel')) return true; // crossing tunnels must use different layers

              if (hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel') && layer1 !== layer2) return true;
            } else if (allowsTunnel(featureType1) && hasTag(tags1, 'tunnel')) return true;else if (allowsTunnel(featureType2) && hasTag(tags2, 'tunnel')) return true; // don't flag crossing waterways and pier/highways


            if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') return true;
            if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') return true;

            if (featureType1 === 'building' || featureType2 === 'building') {
              // for building crossings, different layers are enough
              if (layer1 !== layer2) return true;
            }

            return false;
          } // highway values for which we shouldn't recommend connecting to waterways


          var highwaysDisallowingFords = {
            motorway: true,
            motorway_link: true,
            trunk: true,
            trunk_link: true,
            primary: true,
            primary_link: true,
            secondary: true,
            secondary_link: true
          };
          var nonCrossingHighways = {
            track: true
          };

          function tagsForConnectionNodeIfAllowed(entity1, entity2, graph) {
            var featureType1 = getFeatureType(entity1, graph);
            var featureType2 = getFeatureType(entity2, graph);
            var geometry1 = entity1.geometry(graph);
            var geometry2 = entity2.geometry(graph);
            var bothLines = geometry1 === 'line' && geometry2 === 'line';

            if (featureType1 === featureType2) {
              if (featureType1 === 'highway') {
                var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
                var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];

                if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
                  // one feature is a path but not both
                  var roadFeature = entity1IsPath ? entity2 : entity1;

                  if (nonCrossingHighways[roadFeature.tags.highway]) {
                    // don't mark path connections with certain roads as crossings
                    return {};
                  }

                  var pathFeature = entity1IsPath ? entity1 : entity2;

                  if (['marked', 'unmarked'].indexOf(pathFeature.tags.crossing) !== -1) {
                    // if the path is a crossing, match the crossing type
                    return bothLines ? {
                      highway: 'crossing',
                      crossing: pathFeature.tags.crossing
                    } : {};
                  } // don't add a `crossing` subtag to ambiguous crossings


                  return bothLines ? {
                    highway: 'crossing'
                  } : {};
                }

                return {};
              }

              if (featureType1 === 'waterway') return {};
              if (featureType1 === 'railway') return {};
            } else {
              var featureTypes = [featureType1, featureType2];

              if (featureTypes.indexOf('highway') !== -1) {
                if (featureTypes.indexOf('railway') !== -1) {
                  if (!bothLines) return {};
                  var isTram = entity1.tags.railway === 'tram' || entity2.tags.railway === 'tram';

                  if (osmPathHighwayTagValues[entity1.tags.highway] || osmPathHighwayTagValues[entity2.tags.highway]) {
                    // path-tram connections use this tag
                    if (isTram) return {
                      railway: 'tram_crossing'
                    }; // other path-rail connections use this tag

                    return {
                      railway: 'crossing'
                    };
                  } else {
                    // path-tram connections use this tag
                    if (isTram) return {
                      railway: 'tram_level_crossing'
                    }; // other road-rail connections use this tag

                    return {
                      railway: 'level_crossing'
                    };
                  }
                }

                if (featureTypes.indexOf('waterway') !== -1) {
                  // do not allow fords on structures
                  if (hasTag(entity1.tags, 'tunnel') && hasTag(entity2.tags, 'tunnel')) return null;
                  if (hasTag(entity1.tags, 'bridge') && hasTag(entity2.tags, 'bridge')) return null;

                  if (highwaysDisallowingFords[entity1.tags.highway] || highwaysDisallowingFords[entity2.tags.highway]) {
                    // do not allow fords on major highways
                    return null;
                  }

                  return bothLines ? {
                    ford: 'yes'
                  } : {};
                }
              }
            }

            return null;
          }

          function findCrossingsByWay(way1, graph, tree) {
            var edgeCrossInfos = [];
            if (way1.type !== 'way') return edgeCrossInfos;
            var taggedFeature1 = getFeatureWithFeatureTypeTagsForWay(way1, graph);
            var way1FeatureType = getFeatureType(taggedFeature1, graph);
            if (way1FeatureType === null) return edgeCrossInfos;
            var checkedSingleCrossingWays = {}; // declare vars ahead of time to reduce garbage collection

            var i, j;
            var extent;
            var n1, n2, nA, nB, nAId, nBId;
            var segment1, segment2;
            var oneOnly;
            var segmentInfos, segment2Info, way2, taggedFeature2, way2FeatureType;
            var way1Nodes = graph.childNodes(way1);
            var comparedWays = {};

            for (i = 0; i < way1Nodes.length - 1; i++) {
              n1 = way1Nodes[i];
              n2 = way1Nodes[i + 1];
              extent = geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]); // Optimize by only checking overlapping segments, not every segment
              // of overlapping ways

              segmentInfos = tree.waySegments(extent, graph);

              for (j = 0; j < segmentInfos.length; j++) {
                segment2Info = segmentInfos[j]; // don't check for self-intersection in this validation

                if (segment2Info.wayId === way1.id) continue; // skip if this way was already checked and only one issue is needed

                if (checkedSingleCrossingWays[segment2Info.wayId]) continue; // mark this way as checked even if there are no crossings

                comparedWays[segment2Info.wayId] = true;
                way2 = graph.hasEntity(segment2Info.wayId);
                if (!way2) continue;
                taggedFeature2 = getFeatureWithFeatureTypeTagsForWay(way2, graph); // only check crossing highway, waterway, building, and railway

                way2FeatureType = getFeatureType(taggedFeature2, graph);

                if (way2FeatureType === null || isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
                  continue;
                } // create only one issue for building crossings


                oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
                nAId = segment2Info.nodes[0];
                nBId = segment2Info.nodes[1];

                if (nAId === n1.id || nAId === n2.id || nBId === n1.id || nBId === n2.id) {
                  // n1 or n2 is a connection node; skip
                  continue;
                }

                nA = graph.hasEntity(nAId);
                if (!nA) continue;
                nB = graph.hasEntity(nBId);
                if (!nB) continue;
                segment1 = [n1.loc, n2.loc];
                segment2 = [nA.loc, nB.loc];
                var point = geoLineIntersection(segment1, segment2);

                if (point) {
                  edgeCrossInfos.push({
                    wayInfos: [{
                      way: way1,
                      featureType: way1FeatureType,
                      edge: [n1.id, n2.id]
                    }, {
                      way: way2,
                      featureType: way2FeatureType,
                      edge: [nA.id, nB.id]
                    }],
                    crossPoint: point
                  });

                  if (oneOnly) {
                    checkedSingleCrossingWays[way2.id] = true;
                    break;
                  }
                }
              }
            }

            return edgeCrossInfos;
          }

          function waysToCheck(entity, graph) {
            var featureType = getFeatureType(entity, graph);
            if (!featureType) return [];

            if (entity.type === 'way') {
              return [entity];
            } else if (entity.type === 'relation') {
              return entity.members.reduce(function (array, member) {
                if (member.type === 'way' && ( // only look at geometry ways
                !member.role || member.role === 'outer' || member.role === 'inner')) {
                  var entity = graph.hasEntity(member.id); // don't add duplicates

                  if (entity && array.indexOf(entity) === -1) {
                    array.push(entity);
                  }
                }

                return array;
              }, []);
            }

            return [];
          }

          var validation = function checkCrossingWays(entity, graph) {
            var tree = context.history().tree();
            var ways = waysToCheck(entity, graph);
            var issues = []; // declare these here to reduce garbage collection

            var wayIndex, crossingIndex, crossings;

            for (wayIndex in ways) {
              crossings = findCrossingsByWay(ways[wayIndex], graph, tree);

              for (crossingIndex in crossings) {
                issues.push(createIssue(crossings[crossingIndex], graph));
              }
            }

            return issues;
          };

          function createIssue(crossing, graph) {
            // use the entities with the tags that define the feature type
            crossing.wayInfos.sort(function (way1Info, way2Info) {
              var type1 = way1Info.featureType;
              var type2 = way2Info.featureType;

              if (type1 === type2) {
                return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
              } else if (type1 === 'waterway') {
                return true;
              } else if (type2 === 'waterway') {
                return false;
              }

              return type1 < type2;
            });
            var entities = crossing.wayInfos.map(function (wayInfo) {
              return getFeatureWithFeatureTypeTagsForWay(wayInfo.way, graph);
            });
            var edges = [crossing.wayInfos[0].edge, crossing.wayInfos[1].edge];
            var featureTypes = [crossing.wayInfos[0].featureType, crossing.wayInfos[1].featureType];
            var connectionTags = tagsForConnectionNodeIfAllowed(entities[0], entities[1], graph);
            var featureType1 = crossing.wayInfos[0].featureType;
            var featureType2 = crossing.wayInfos[1].featureType;
            var isCrossingIndoors = taggedAsIndoor(entities[0].tags) && taggedAsIndoor(entities[1].tags);
            var isCrossingTunnels = allowsTunnel(featureType1) && hasTag(entities[0].tags, 'tunnel') && allowsTunnel(featureType2) && hasTag(entities[1].tags, 'tunnel');
            var isCrossingBridges = allowsBridge(featureType1) && hasTag(entities[0].tags, 'bridge') && allowsBridge(featureType2) && hasTag(entities[1].tags, 'bridge');
            var subtype = [featureType1, featureType2].sort().join('-');
            var crossingTypeID = subtype;

            if (isCrossingIndoors) {
              crossingTypeID = 'indoor-indoor';
            } else if (isCrossingTunnels) {
              crossingTypeID = 'tunnel-tunnel';
            } else if (isCrossingBridges) {
              crossingTypeID = 'bridge-bridge';
            }

            if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
              crossingTypeID += '_connectable';
            } // Differentiate based on the loc rounded to 4 digits, since two ways can cross multiple times.


            var uniqueID = '' + crossing.crossPoint[0].toFixed(4) + ',' + crossing.crossPoint[1].toFixed(4);
            return new validationIssue({
              type: type,
              subtype: subtype,
              severity: 'warning',
              message: function message(context) {
                var graph = context.graph();
                var entity1 = graph.hasEntity(this.entityIds[0]),
                    entity2 = graph.hasEntity(this.entityIds[1]);
                return entity1 && entity2 ? _t.html('issues.crossing_ways.message', {
                  feature: utilDisplayLabel(entity1, graph),
                  feature2: utilDisplayLabel(entity2, graph)
                }) : '';
              },
              reference: showReference,
              entityIds: entities.map(function (entity) {
                return entity.id;
              }),
              data: {
                edges: edges,
                featureTypes: featureTypes,
                connectionTags: connectionTags
              },
              hash: uniqueID,
              loc: crossing.crossPoint,
              dynamicFixes: function dynamicFixes(context) {
                var mode = context.mode();
                if (!mode || mode.id !== 'select' || mode.selectedIDs().length !== 1) return [];
                var selectedIndex = this.entityIds[0] === mode.selectedIDs()[0] ? 0 : 1;
                var selectedFeatureType = this.data.featureTypes[selectedIndex];
                var otherFeatureType = this.data.featureTypes[selectedIndex === 0 ? 1 : 0];
                var fixes = [];

                if (connectionTags) {
                  fixes.push(makeConnectWaysFix(this.data.connectionTags));
                }

                if (isCrossingIndoors) {
                  fixes.push(new validationIssueFix({
                    icon: 'iD-icon-layers',
                    title: _t.html('issues.fix.use_different_levels.title')
                  }));
                } else if (isCrossingTunnels || isCrossingBridges || featureType1 === 'building' || featureType2 === 'building') {
                  fixes.push(makeChangeLayerFix('higher'));
                  fixes.push(makeChangeLayerFix('lower')); // can only add bridge/tunnel if both features are lines
                } else if (context.graph().geometry(this.entityIds[0]) === 'line' && context.graph().geometry(this.entityIds[1]) === 'line') {
                  // don't recommend adding bridges to waterways since they're uncommon
                  if (allowsBridge(selectedFeatureType) && selectedFeatureType !== 'waterway') {
                    fixes.push(makeAddBridgeOrTunnelFix('add_a_bridge', 'temaki-bridge', 'bridge'));
                  } // don't recommend adding tunnels under waterways since they're uncommon


                  var skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';

                  if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
                    fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
                  }
                } // repositioning the features is always an option


                fixes.push(new validationIssueFix({
                  icon: 'iD-operation-move',
                  title: _t.html('issues.fix.reposition_features.title')
                }));
                return fixes;
              }
            });

            function showReference(selection) {
              selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.crossing_ways.' + crossingTypeID + '.reference'));
            }
          }

          function makeAddBridgeOrTunnelFix(fixTitleID, iconName, bridgeOrTunnel) {
            return new validationIssueFix({
              icon: iconName,
              title: _t.html('issues.fix.' + fixTitleID + '.title'),
              onClick: function onClick(context) {
                var mode = context.mode();
                if (!mode || mode.id !== 'select') return;
                var selectedIDs = mode.selectedIDs();
                if (selectedIDs.length !== 1) return;
                var selectedWayID = selectedIDs[0];
                if (!context.hasEntity(selectedWayID)) return;
                var resultWayIDs = [selectedWayID];
                var edge, crossedEdge, crossedWayID;

                if (this.issue.entityIds[0] === selectedWayID) {
                  edge = this.issue.data.edges[0];
                  crossedEdge = this.issue.data.edges[1];
                  crossedWayID = this.issue.entityIds[1];
                } else {
                  edge = this.issue.data.edges[1];
                  crossedEdge = this.issue.data.edges[0];
                  crossedWayID = this.issue.entityIds[0];
                }

                var crossingLoc = this.issue.loc;
                var projection = context.projection;

                var action = function actionAddStructure(graph) {
                  var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
                  var crossedWay = graph.hasEntity(crossedWayID); // use the explicit width of the crossed feature as the structure length, if available

                  var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);

                  if (!structLengthMeters) {
                    // if no explicit width is set, approximate the width based on the tags
                    structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
                  }

                  if (structLengthMeters) {
                    if (getFeatureType(crossedWay, graph) === 'railway') {
                      // bridges over railways are generally much longer than the rail bed itself, compensate
                      structLengthMeters *= 2;
                    }
                  } else {
                    // should ideally never land here since all rail/water/road tags should have an implied width
                    structLengthMeters = 8;
                  }

                  var a1 = geoAngle(edgeNodes[0], edgeNodes[1], projection) + Math.PI;
                  var a2 = geoAngle(graph.entity(crossedEdge[0]), graph.entity(crossedEdge[1]), projection) + Math.PI;
                  var crossingAngle = Math.max(a1, a2) - Math.min(a1, a2);
                  if (crossingAngle > Math.PI) crossingAngle -= Math.PI; // lengthen the structure to account for the angle of the crossing

                  structLengthMeters = structLengthMeters / 2 / Math.sin(crossingAngle) * 2; // add padding since the structure must extend past the edges of the crossed feature

                  structLengthMeters += 4; // clamp the length to a reasonable range

                  structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);

                  function geomToProj(geoPoint) {
                    return [geoLonToMeters(geoPoint[0], geoPoint[1]), geoLatToMeters(geoPoint[1])];
                  }

                  function projToGeom(projPoint) {
                    var lat = geoMetersToLat(projPoint[1]);
                    return [geoMetersToLon(projPoint[0], lat), lat];
                  }

                  var projEdgeNode1 = geomToProj(edgeNodes[0].loc);
                  var projEdgeNode2 = geomToProj(edgeNodes[1].loc);
                  var projectedAngle = geoVecAngle(projEdgeNode1, projEdgeNode2);
                  var projectedCrossingLoc = geomToProj(crossingLoc);
                  var linearToSphericalMetersRatio = geoVecLength(projEdgeNode1, projEdgeNode2) / geoSphericalDistance(edgeNodes[0].loc, edgeNodes[1].loc);

                  function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
                    var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
                    return projToGeom([projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters, projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters]);
                  }

                  var endpointLocGetter1 = function endpointLocGetter1(lengthMeters) {
                    return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
                  };

                  var endpointLocGetter2 = function endpointLocGetter2(lengthMeters) {
                    return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
                  }; // avoid creating very short edges from splitting too close to another node


                  var minEdgeLengthMeters = 0.55; // decide where to bound the structure along the way, splitting as necessary

                  function determineEndpoint(edge, endNode, locGetter) {
                    var newNode;
                    var idealLengthMeters = structLengthMeters / 2; // distance between the crossing location and the end of the edge,
                    // the maximum length of this side of the structure

                    var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);

                    if (crossingToEdgeEndDistance - idealLengthMeters > minEdgeLengthMeters) {
                      // the edge is long enough to insert a new node
                      // the loc that would result in the full expected length
                      var idealNodeLoc = locGetter(idealLengthMeters);
                      newNode = osmNode();
                      graph = actionAddMidpoint({
                        loc: idealNodeLoc,
                        edge: edge
                      }, newNode)(graph);
                    } else {
                      var edgeCount = 0;
                      endNode.parentIntersectionWays(graph).forEach(function (way) {
                        way.nodes.forEach(function (nodeID) {
                          if (nodeID === endNode.id) {
                            if (endNode.id === way.first() && endNode.id !== way.last() || endNode.id === way.last() && endNode.id !== way.first()) {
                              edgeCount += 1;
                            } else {
                              edgeCount += 2;
                            }
                          }
                        });
                      });

                      if (edgeCount >= 3) {
                        // the end node is a junction, try to leave a segment
                        // between it and the structure - #7202
                        var insetLength = crossingToEdgeEndDistance - minEdgeLengthMeters;

                        if (insetLength > minEdgeLengthMeters) {
                          var insetNodeLoc = locGetter(insetLength);
                          newNode = osmNode();
                          graph = actionAddMidpoint({
                            loc: insetNodeLoc,
                            edge: edge
                          }, newNode)(graph);
                        }
                      }
                    } // if the edge is too short to subdivide as desired, then
                    // just bound the structure at the existing end node


                    if (!newNode) newNode = endNode;
                    var splitAction = actionSplit([newNode.id]).limitWays(resultWayIDs); // only split selected or created ways
                    // do the split

                    graph = splitAction(graph);

                    if (splitAction.getCreatedWayIDs().length) {
                      resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
                    }

                    return newNode;
                  }

                  var structEndNode1 = determineEndpoint(edge, edgeNodes[1], endpointLocGetter1);
                  var structEndNode2 = determineEndpoint([edgeNodes[0].id, structEndNode1.id], edgeNodes[0], endpointLocGetter2);
                  var structureWay = resultWayIDs.map(function (id) {
                    return graph.entity(id);
                  }).find(function (way) {
                    return way.nodes.indexOf(structEndNode1.id) !== -1 && way.nodes.indexOf(structEndNode2.id) !== -1;
                  });
                  var tags = Object.assign({}, structureWay.tags); // copy tags

                  if (bridgeOrTunnel === 'bridge') {
                    tags.bridge = 'yes';
                    tags.layer = '1';
                  } else {
                    var tunnelValue = 'yes';

                    if (getFeatureType(structureWay, graph) === 'waterway') {
                      // use `tunnel=culvert` for waterways by default
                      tunnelValue = 'culvert';
                    }

                    tags.tunnel = tunnelValue;
                    tags.layer = '-1';
                  } // apply the structure tags to the way


                  graph = actionChangeTags(structureWay.id, tags)(graph);
                  return graph;
                };

                context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
                context.enter(modeSelect(context, resultWayIDs));
              }
            });
          }

          function makeConnectWaysFix(connectionTags) {
            var fixTitleID = 'connect_features';

            if (connectionTags.ford) {
              fixTitleID = 'connect_using_ford';
            }

            return new validationIssueFix({
              icon: 'iD-icon-crossing',
              title: _t.html('issues.fix.' + fixTitleID + '.title'),
              onClick: function onClick(context) {
                var loc = this.issue.loc;
                var connectionTags = this.issue.data.connectionTags;
                var edges = this.issue.data.edges;
                context.perform(function actionConnectCrossingWays(graph) {
                  // create the new node for the points
                  var node = osmNode({
                    loc: loc,
                    tags: connectionTags
                  });
                  graph = graph.replace(node);
                  var nodesToMerge = [node.id];
                  var mergeThresholdInMeters = 0.75;
                  edges.forEach(function (edge) {
                    var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
                    var nearby = geoSphericalClosestNode(edgeNodes, loc); // if there is already a suitable node nearby, use that
                    // use the node if node has no interesting tags or if it is a crossing node #8326

                    if ((!nearby.node.hasInterestingTags() || nearby.node.isCrossing()) && nearby.distance < mergeThresholdInMeters) {
                      nodesToMerge.push(nearby.node.id); // else add the new node to the way
                    } else {
                      graph = actionAddMidpoint({
                        loc: loc,
                        edge: edge
                      }, node)(graph);
                    }
                  });

                  if (nodesToMerge.length > 1) {
                    // if we're using nearby nodes, merge them with the new node
                    graph = actionMergeNodes(nodesToMerge, loc)(graph);
                  }

                  return graph;
                }, _t('issues.fix.connect_crossing_features.annotation'));
              }
            });
          }

          function makeChangeLayerFix(higherOrLower) {
            return new validationIssueFix({
              icon: 'iD-icon-' + (higherOrLower === 'higher' ? 'up' : 'down'),
              title: _t.html('issues.fix.tag_this_as_' + higherOrLower + '.title'),
              onClick: function onClick(context) {
                var mode = context.mode();
                if (!mode || mode.id !== 'select') return;
                var selectedIDs = mode.selectedIDs();
                if (selectedIDs.length !== 1) return;
                var selectedID = selectedIDs[0];
                if (!this.issue.entityIds.some(function (entityId) {
                  return entityId === selectedID;
                })) return;
                var entity = context.hasEntity(selectedID);
                if (!entity) return;
                var tags = Object.assign({}, entity.tags); // shallow copy

                var layer = tags.layer && Number(tags.layer);

                if (layer && !isNaN(layer)) {
                  if (higherOrLower === 'higher') {
                    layer += 1;
                  } else {
                    layer -= 1;
                  }
                } else {
                  if (higherOrLower === 'higher') {
                    layer = 1;
                  } else {
                    layer = -1;
                  }
                }

                tags.layer = layer.toString();
                context.perform(actionChangeTags(entity.id, tags), _t('operations.change_tags.annotation'));
              }
            });
          }

          validation.type = type;
          return validation;
        }

        function behaviorDrawWay(context, wayID, mode, startGraph) {
          var dispatch = dispatch$8('rejectedSelfIntersection');
          var behavior = behaviorDraw(context); // Must be set by `drawWay.nodeIndex` before each install of this behavior.

          var _nodeIndex;

          var _origWay;

          var _wayGeometry;

          var _headNodeID;

          var _annotation;

          var _pointerHasMoved = false; // The osmNode to be placed.
          // This is temporary and just follows the mouse cursor until an "add" event occurs.

          var _drawNode;

          var _didResolveTempEdit = false;

          function createDrawNode(loc) {
            // don't make the draw node until we actually need it
            _drawNode = osmNode({
              loc: loc
            });
            context.pauseChangeDispatch();
            context.replace(function actionAddDrawNode(graph) {
              // add the draw node to the graph and insert it into the way
              var way = graph.entity(wayID);
              return graph.replace(_drawNode).replace(way.addNode(_drawNode.id, _nodeIndex));
            }, _annotation);
            context.resumeChangeDispatch();
            setActiveElements();
          }

          function removeDrawNode() {
            context.pauseChangeDispatch();
            context.replace(function actionDeleteDrawNode(graph) {
              var way = graph.entity(wayID);
              return graph.replace(way.removeNode(_drawNode.id)).remove(_drawNode);
            }, _annotation);
            _drawNode = undefined;
            context.resumeChangeDispatch();
          }

          function keydown(d3_event) {
            if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
              if (context.surface().classed('nope')) {
                context.surface().classed('nope-suppressed', true);
              }

              context.surface().classed('nope', false).classed('nope-disabled', true);
            }
          }

          function keyup(d3_event) {
            if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
              if (context.surface().classed('nope-suppressed')) {
                context.surface().classed('nope', true);
              }

              context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
            }
          }

          function allowsVertex(d) {
            return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
          } // related code
          // - `mode/drag_node.js`     `doMove()`
          // - `behavior/draw.js`      `click()`
          // - `behavior/draw_way.js`  `move()`


          function move(d3_event, datum) {
            var loc = context.map().mouseCoordinates();
            if (!_drawNode) createDrawNode(loc);
            context.surface().classed('nope-disabled', d3_event.altKey);
            var targetLoc = datum && datum.properties && datum.properties.entity && allowsVertex(datum.properties.entity) && datum.properties.entity.loc;
            var targetNodes = datum && datum.properties && datum.properties.nodes;

            if (targetLoc) {
              // snap to node/vertex - a point target with `.loc`
              loc = targetLoc;
            } else if (targetNodes) {
              // snap to way - a line target with `.nodes`
              var choice = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, _drawNode.id);

              if (choice) {
                loc = choice.loc;
              }
            }

            context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
            _drawNode = context.entity(_drawNode.id);
            checkGeometry(true
            /* includeDrawNode */
            );
          } // Check whether this edit causes the geometry to break.
          // If so, class the surface with a nope cursor.
          // `includeDrawNode` - Only check the relevant line segments if finishing drawing


          function checkGeometry(includeDrawNode) {
            var nopeDisabled = context.surface().classed('nope-disabled');
            var isInvalid = isInvalidGeometry(includeDrawNode);

            if (nopeDisabled) {
              context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
            } else {
              context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
            }
          }

          function isInvalidGeometry(includeDrawNode) {
            var testNode = _drawNode; // we only need to test the single way we're drawing

            var parentWay = context.graph().entity(wayID);
            var nodes = context.graph().childNodes(parentWay).slice(); // shallow copy

            if (includeDrawNode) {
              if (parentWay.isClosed()) {
                // don't test the last segment for closed ways - #4655
                // (still test the first segment)
                nodes.pop();
              }
            } else {
              // discount the draw node
              if (parentWay.isClosed()) {
                if (nodes.length < 3) return false;
                if (_drawNode) nodes.splice(-2, 1);
                testNode = nodes[nodes.length - 2];
              } else {
                // there's nothing we need to test if we ignore the draw node on open ways
                return false;
              }
            }

            return testNode && geoHasSelfIntersections(nodes, testNode.id);
          }

          function undone() {
            // undoing removed the temp edit
            _didResolveTempEdit = true;
            context.pauseChangeDispatch();
            var nextMode;

            if (context.graph() === startGraph) {
              // We've undone back to the initial state before we started drawing.
              // Just exit the draw mode without undoing whatever we did before
              // we entered the draw mode.
              nextMode = modeSelect(context, [wayID]);
            } else {
              // The `undo` only removed the temporary edit, so here we have to
              // manually undo to actually remove the last node we added. We can't
              // use the `undo` function since the initial "add" graph doesn't have
              // an annotation and so cannot be undone to.
              context.pop(1); // continue drawing

              nextMode = mode;
            } // clear the redo stack by adding and removing a blank edit


            context.perform(actionNoop());
            context.pop(1);
            context.resumeChangeDispatch();
            context.enter(nextMode);
          }

          function setActiveElements() {
            if (!_drawNode) return;
            context.surface().selectAll('.' + _drawNode.id).classed('active', true);
          }

          function resetToStartGraph() {
            while (context.graph() !== startGraph) {
              context.pop();
            }
          }

          var drawWay = function drawWay(surface) {
            _drawNode = undefined;
            _didResolveTempEdit = false;
            _origWay = context.entity(wayID);

            if (typeof _nodeIndex === 'number') {
              _headNodeID = _origWay.nodes[_nodeIndex];
            } else if (_origWay.isClosed()) {
              _headNodeID = _origWay.nodes[_origWay.nodes.length - 2];
            } else {
              _headNodeID = _origWay.nodes[_origWay.nodes.length - 1];
            }

            _wayGeometry = _origWay.geometry(context.graph());
            _annotation = _t((_origWay.nodes.length === (_origWay.isClosed() ? 2 : 1) ? 'operations.start.annotation.' : 'operations.continue.annotation.') + _wayGeometry);
            _pointerHasMoved = false; // Push an annotated state for undo to return back to.
            // We must make sure to replace or remove it later.

            context.pauseChangeDispatch();
            context.perform(actionNoop(), _annotation);
            context.resumeChangeDispatch();
            behavior.hover().initialNodeID(_headNodeID);
            behavior.on('move', function () {
              _pointerHasMoved = true;
              move.apply(this, arguments);
            }).on('down', function () {
              move.apply(this, arguments);
            }).on('downcancel', function () {
              if (_drawNode) removeDrawNode();
            }).on('click', drawWay.add).on('clickWay', drawWay.addWay).on('clickNode', drawWay.addNode).on('undo', context.undo).on('cancel', drawWay.cancel).on('finish', drawWay.finish);
            select(window).on('keydown.drawWay', keydown).on('keyup.drawWay', keyup);
            context.map().dblclickZoomEnable(false).on('drawn.draw', setActiveElements);
            setActiveElements();
            surface.call(behavior);
            context.history().on('undone.draw', undone);
          };

          drawWay.off = function (surface) {
            if (!_didResolveTempEdit) {
              // Drawing was interrupted unexpectedly.
              // This can happen if the user changes modes,
              // clicks geolocate button, a hashchange event occurs, etc.
              context.pauseChangeDispatch();
              resetToStartGraph();
              context.resumeChangeDispatch();
            }

            _drawNode = undefined;
            _nodeIndex = undefined;
            context.map().on('drawn.draw', null);
            surface.call(behavior.off).selectAll('.active').classed('active', false);
            surface.classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false);
            select(window).on('keydown.drawWay', null).on('keyup.drawWay', null);
            context.history().on('undone.draw', null);
          };

          function attemptAdd(d, loc, doAdd) {
            if (_drawNode) {
              // move the node to the final loc in case move wasn't called
              // consistently (e.g. on touch devices)
              context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
              _drawNode = context.entity(_drawNode.id);
            } else {
              createDrawNode(loc);
            }

            checkGeometry(true
            /* includeDrawNode */
            );

            if (d && d.properties && d.properties.nope || context.surface().classed('nope')) {
              if (!_pointerHasMoved) {
                // prevent the temporary draw node from appearing on touch devices
                removeDrawNode();
              }

              dispatch.call('rejectedSelfIntersection', this);
              return; // can't click here
            }

            context.pauseChangeDispatch();
            doAdd(); // we just replaced the temporary edit with the real one

            _didResolveTempEdit = true;
            context.resumeChangeDispatch();
            context.enter(mode);
          } // Accept the current position of the drawing node


          drawWay.add = function (loc, d) {
            attemptAdd(d, loc, function () {// don't need to do anything extra
            });
          }; // Connect the way to an existing way


          drawWay.addWay = function (loc, edge, d) {
            attemptAdd(d, loc, function () {
              context.replace(actionAddMidpoint({
                loc: loc,
                edge: edge
              }, _drawNode), _annotation);
            });
          }; // Connect the way to an existing node


          drawWay.addNode = function (node, d) {
            // finish drawing if the mapper targets the prior node
            if (node.id === _headNodeID || // or the first node when drawing an area
            _origWay.isClosed() && node.id === _origWay.first()) {
              drawWay.finish();
              return;
            }

            attemptAdd(d, node.loc, function () {
              context.replace(function actionReplaceDrawNode(graph) {
                // remove the temporary draw node and insert the existing node
                // at the same index
                graph = graph.replace(graph.entity(wayID).removeNode(_drawNode.id)).remove(_drawNode);
                return graph.replace(graph.entity(wayID).addNode(node.id, _nodeIndex));
              }, _annotation);
            });
          }; // Finish the draw operation, removing the temporary edit.
          // If the way has enough nodes to be valid, it's selected.
          // Otherwise, delete everything and return to browse mode.


          drawWay.finish = function () {
            checkGeometry(false
            /* includeDrawNode */
            );

            if (context.surface().classed('nope')) {
              dispatch.call('rejectedSelfIntersection', this);
              return; // can't click here
            }

            context.pauseChangeDispatch(); // remove the temporary edit

            context.pop(1);
            _didResolveTempEdit = true;
            context.resumeChangeDispatch();
            var way = context.hasEntity(wayID);

            if (!way || way.isDegenerate()) {
              drawWay.cancel();
              return;
            }

            window.setTimeout(function () {
              context.map().dblclickZoomEnable(true);
            }, 1000);
            var isNewFeature = !mode.isContinuing;
            context.enter(modeSelect(context, [wayID]).newFeature(isNewFeature));
          }; // Cancel the draw operation, delete everything, and return to browse mode.


          drawWay.cancel = function () {
            context.pauseChangeDispatch();
            resetToStartGraph();
            context.resumeChangeDispatch();
            window.setTimeout(function () {
              context.map().dblclickZoomEnable(true);
            }, 1000);
            context.surface().classed('nope', false).classed('nope-disabled', false).classed('nope-suppressed', false);
            context.enter(modeBrowse(context));
          };

          drawWay.nodeIndex = function (val) {
            if (!arguments.length) return _nodeIndex;
            _nodeIndex = val;
            return drawWay;
          };

          drawWay.activeID = function () {
            if (!arguments.length) return _drawNode && _drawNode.id; // no assign

            return drawWay;
          };

          return utilRebind(drawWay, dispatch, 'on');
        }

        function modeDrawLine(context, wayID, startGraph, button, affix, continuing) {
          var mode = {
            button: button,
            id: 'draw-line'
          };
          var behavior = behaviorDrawWay(context, wayID, mode, startGraph).on('rejectedSelfIntersection.modeDrawLine', function () {
            context.ui().flash.iconName('#iD-icon-no').label(_t('self_intersection.error.lines'))();
          });
          mode.wayID = wayID;
          mode.isContinuing = continuing;

          mode.enter = function () {
            behavior.nodeIndex(affix === 'prefix' ? 0 : undefined);
            context.install(behavior);
          };

          mode.exit = function () {
            context.uninstall(behavior);
          };

          mode.selectedIDs = function () {
            return [wayID];
          };

          mode.activeID = function () {
            return behavior && behavior.activeID() || [];
          };

          return mode;
        }

        function validationDisconnectedWay() {
          var type = 'disconnected_way';

          function isTaggedAsHighway(entity) {
            return osmRoutableHighwayTagValues[entity.tags.highway];
          }

          var validation = function checkDisconnectedWay(entity, graph) {
            var routingIslandWays = routingIslandForEntity(entity);
            if (!routingIslandWays) return [];
            return [new validationIssue({
              type: type,
              subtype: 'highway',
              severity: 'warning',
              message: function message(context) {
                var entity = this.entityIds.length && context.hasEntity(this.entityIds[0]);
                var label = entity && utilDisplayLabel(entity, context.graph());
                return _t.html('issues.disconnected_way.routable.message', {
                  count: this.entityIds.length,
                  highway: label
                });
              },
              reference: showReference,
              entityIds: Array.from(routingIslandWays).map(function (way) {
                return way.id;
              }),
              dynamicFixes: makeFixes
            })];

            function makeFixes(context) {
              var fixes = [];
              var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);

              if (singleEntity) {
                if (singleEntity.type === 'way' && !singleEntity.isClosed()) {
                  var textDirection = _mainLocalizer.textDirection();
                  var startFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.first(), 'start');
                  if (startFix) fixes.push(startFix);
                  var endFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.last(), 'end');
                  if (endFix) fixes.push(endFix);
                }

                if (!fixes.length) {
                  fixes.push(new validationIssueFix({
                    title: _t.html('issues.fix.connect_feature.title')
                  }));
                }

                fixes.push(new validationIssueFix({
                  icon: 'iD-operation-delete',
                  title: _t.html('issues.fix.delete_feature.title'),
                  entityIds: [singleEntity.id],
                  onClick: function onClick(context) {
                    var id = this.issue.entityIds[0];
                    var operation = operationDelete(context, [id]);

                    if (!operation.disabled()) {
                      operation();
                    }
                  }
                }));
              } else {
                fixes.push(new validationIssueFix({
                  title: _t.html('issues.fix.connect_features.title')
                }));
              }

              return fixes;
            }

            function showReference(selection) {
              selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.disconnected_way.routable.reference'));
            }

            function routingIslandForEntity(entity) {
              var routingIsland = new Set(); // the interconnected routable features

              var waysToCheck = []; // the queue of remaining routable ways to traverse

              function queueParentWays(node) {
                graph.parentWays(node).forEach(function (parentWay) {
                  if (!routingIsland.has(parentWay) && // only check each feature once
                  isRoutableWay(parentWay, false)) {
                    // only check routable features
                    routingIsland.add(parentWay);
                    waysToCheck.push(parentWay);
                  }
                });
              }

              if (entity.type === 'way' && isRoutableWay(entity, true)) {
                routingIsland.add(entity);
                waysToCheck.push(entity);
              } else if (entity.type === 'node' && isRoutableNode(entity)) {
                routingIsland.add(entity);
                queueParentWays(entity);
              } else {
                // this feature isn't routable, cannot be a routing island
                return null;
              }

              while (waysToCheck.length) {
                var wayToCheck = waysToCheck.pop();
                var childNodes = graph.childNodes(wayToCheck);

                for (var i in childNodes) {
                  var vertex = childNodes[i];

                  if (isConnectedVertex(vertex)) {
                    // found a link to the wider network, not a routing island
                    return null;
                  }

                  if (isRoutableNode(vertex)) {
                    routingIsland.add(vertex);
                  }

                  queueParentWays(vertex);
                }
              } // no network link found, this is a routing island, return its members


              return routingIsland;
            }

            function isConnectedVertex(vertex) {
              // assume ways overlapping unloaded tiles are connected to the wider road network  - #5938
              var osm = services.osm;
              if (osm && !osm.isDataLoaded(vertex.loc)) return true; // entrances are considered connected

              if (vertex.tags.entrance && vertex.tags.entrance !== 'no') return true;
              if (vertex.tags.amenity === 'parking_entrance') return true;
              return false;
            }

            function isRoutableNode(node) {
              // treat elevators as distinct features in the highway network
              if (node.tags.highway === 'elevator') return true;
              return false;
            }

            function isRoutableWay(way, ignoreInnerWays) {
              if (isTaggedAsHighway(way) || way.tags.route === 'ferry') return true;
              return graph.parentRelations(way).some(function (parentRelation) {
                if (parentRelation.tags.type === 'route' && parentRelation.tags.route === 'ferry') return true;
                if (parentRelation.isMultipolygon() && isTaggedAsHighway(parentRelation) && (!ignoreInnerWays || parentRelation.memberById(way.id).role !== 'inner')) return true;
                return false;
              });
            }

            function makeContinueDrawingFixIfAllowed(textDirection, vertexID, whichEnd) {
              var vertex = graph.hasEntity(vertexID);
              if (!vertex || vertex.tags.noexit === 'yes') return null;
              var useLeftContinue = whichEnd === 'start' && textDirection === 'ltr' || whichEnd === 'end' && textDirection === 'rtl';
              return new validationIssueFix({
                icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
                title: _t.html('issues.fix.continue_from_' + whichEnd + '.title'),
                entityIds: [vertexID],
                onClick: function onClick(context) {
                  var wayId = this.issue.entityIds[0];
                  var way = context.hasEntity(wayId);
                  var vertexId = this.entityIds[0];
                  var vertex = context.hasEntity(vertexId);
                  if (!way || !vertex) return; // make sure the vertex is actually visible and editable

                  var map = context.map();

                  if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
                    map.zoomToEase(vertex);
                  }

                  context.enter(modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true));
                }
              });
            }
          };

          validation.type = type;
          return validation;
        }

        function validationFormatting() {
          var type = 'invalid_format';

          var validation = function validation(entity) {
            var issues = [];

            function isValidEmail(email) {
              // Emails in OSM are going to be official so they should be pretty simple
              // Using negated lists to better support all possible unicode characters (#6494)
              var valid_email = /^[^\(\)\\,":;<>@\[\]]+@[^\(\)\\,":;<>@\[\]\.]+(?:\.[a-z0-9-]+)*$/i; // An empty value is also acceptable

              return !email || valid_email.test(email);
            }
            /*
            function isSchemePresent(url) {
                var valid_scheme = /^https?:\/\//i;
                return (!url || valid_scheme.test(url));
            }
            */


            function showReferenceEmail(selection) {
              selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.invalid_format.email.reference'));
            }
            /*
            function showReferenceWebsite(selection) {
                selection.selectAll('.issue-reference')
                    .data([0])
                    .enter()
                    .append('div')
                    .attr('class', 'issue-reference')
                    .html(t.html('issues.invalid_format.website.reference'));
            }
             if (entity.tags.website) {
                // Multiple websites are possible
                // If ever we support ES6, arrow functions make this nicer
                var websites = entity.tags.website
                    .split(';')
                    .map(function(s) { return s.trim(); })
                    .filter(function(x) { return !isSchemePresent(x); });
                 if (websites.length) {
                    issues.push(new validationIssue({
                        type: type,
                        subtype: 'website',
                        severity: 'warning',
                        message: function(context) {
                            var entity = context.hasEntity(this.entityIds[0]);
                            return entity ? t.html('issues.invalid_format.website.message' + this.data,
                                { feature: utilDisplayLabel(entity, context.graph()), site: websites.join(', ') }) : '';
                        },
                        reference: showReferenceWebsite,
                        entityIds: [entity.id],
                        hash: websites.join(),
                        data: (websites.length > 1) ? '_multi' : ''
                    }));
                }
            }
            */


            if (entity.tags.email) {
              // Multiple emails are possible
              var emails = entity.tags.email.split(';').map(function (s) {
                return s.trim();
              }).filter(function (x) {
                return !isValidEmail(x);
              });

              if (emails.length) {
                issues.push(new validationIssue({
                  type: type,
                  subtype: 'email',
                  severity: 'warning',
                  message: function message(context) {
                    var entity = context.hasEntity(this.entityIds[0]);
                    return entity ? _t.html('issues.invalid_format.email.message' + this.data, {
                      feature: utilDisplayLabel(entity, context.graph()),
                      email: emails.join(', ')
                    }) : '';
                  },
                  reference: showReferenceEmail,
                  entityIds: [entity.id],
                  hash: emails.join(),
                  data: emails.length > 1 ? '_multi' : ''
                }));
              }
            }

            return issues;
          };

          validation.type = type;
          return validation;
        }

        function validationHelpRequest(context) {
          var type = 'help_request';

          var validation = function checkFixmeTag(entity) {
            if (!entity.tags.fixme) return []; // don't flag fixmes on features added by the user

            if (entity.version === undefined) return [];

            if (entity.v !== undefined) {
              var baseEntity = context.history().base().hasEntity(entity.id); // don't flag fixmes added by the user on existing features

              if (!baseEntity || !baseEntity.tags.fixme) return [];
            }

            return [new validationIssue({
              type: type,
              subtype: 'fixme_tag',
              severity: 'warning',
              message: function message(context) {
                var entity = context.hasEntity(this.entityIds[0]);
                return entity ? _t.html('issues.fixme_tag.message', {
                  feature: utilDisplayLabel(entity, context.graph(), true
                  /* verbose */
                  )
                }) : '';
              },
              dynamicFixes: function dynamicFixes() {
                return [new validationIssueFix({
                  title: _t.html('issues.fix.address_the_concern.title')
                })];
              },
              reference: showReference,
              entityIds: [entity.id]
            })];

            function showReference(selection) {
              selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.fixme_tag.reference'));
            }
          };

          validation.type = type;
          return validation;
        }

        function validationImpossibleOneway() {
          var type = 'impossible_oneway';

          var validation = function checkImpossibleOneway(entity, graph) {
            if (entity.type !== 'way' || entity.geometry(graph) !== 'line') return [];
            if (entity.isClosed()) return [];
            if (!typeForWay(entity)) return [];
            if (!isOneway(entity)) return [];
            var firstIssues = issuesForNode(entity, entity.first());
            var lastIssues = issuesForNode(entity, entity.last());
            return firstIssues.concat(lastIssues);

            function typeForWay(way) {
              if (way.geometry(graph) !== 'line') return null;
              if (osmRoutableHighwayTagValues[way.tags.highway]) return 'highway';
              if (osmFlowingWaterwayTagValues[way.tags.waterway]) return 'waterway';
              return null;
            }

            function isOneway(way) {
              if (way.tags.oneway === 'yes') return true;
              if (way.tags.oneway) return false;

              for (var key in way.tags) {
                if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
                  return true;
                }
              }

              return false;
            }

            function nodeOccursMoreThanOnce(way, nodeID) {
              var occurrences = 0;

              for (var index in way.nodes) {
                if (way.nodes[index] === nodeID) {
                  occurrences += 1;
                  if (occurrences > 1) return true;
                }
              }

              return false;
            }

            function isConnectedViaOtherTypes(way, node) {
              var wayType = typeForWay(way);

              if (wayType === 'highway') {
                // entrances are considered connected
                if (node.tags.entrance && node.tags.entrance !== 'no') return true;
                if (node.tags.amenity === 'parking_entrance') return true;
              } else if (wayType === 'waterway') {
                if (node.id === way.first()) {
                  // multiple waterways may start at the same spring
                  if (node.tags.natural === 'spring') return true;
                } else {
                  // multiple waterways may end at the same drain
                  if (node.tags.manhole === 'drain') return true;
                }
              }

              return graph.parentWays(node).some(function (parentWay) {
                if (parentWay.id === way.id) return false;

                if (wayType === 'highway') {
                  // allow connections to highway areas
                  if (parentWay.geometry(graph) === 'area' && osmRoutableHighwayTagValues[parentWay.tags.highway]) return true; // count connections to ferry routes as connected

                  if (parentWay.tags.route === 'ferry') return true;
                  return graph.parentRelations(parentWay).some(function (parentRelation) {
                    if (parentRelation.tags.type === 'route' && parentRelation.tags.route === 'ferry') return true; // allow connections to highway multipolygons

                    return parentRelation.isMultipolygon() && osmRoutableHighwayTagValues[parentRelation.tags.highway];
                  });
                } else if (wayType === 'waterway') {
                  // multiple waterways may start or end at a water body at the same node
                  if (parentWay.tags.natural === 'water' || parentWay.tags.natural === 'coastline') return true;
                }

                return false;
              });
            }

            function issuesForNode(way, nodeID) {
              var isFirst = nodeID === way.first();
              var wayType = typeForWay(way); // ignore if this way is self-connected at this node

              if (nodeOccursMoreThanOnce(way, nodeID)) return [];
              var osm = services.osm;
              if (!osm) return [];
              var node = graph.hasEntity(nodeID); // ignore if this node or its tile are unloaded

              if (!node || !osm.isDataLoaded(node.loc)) return [];
              if (isConnectedViaOtherTypes(way, node)) return [];
              var attachedWaysOfSameType = graph.parentWays(node).filter(function (parentWay) {
                if (parentWay.id === way.id) return false;
                return typeForWay(parentWay) === wayType;
              }); // assume it's okay for waterways to start or end disconnected for now

              if (wayType === 'waterway' && attachedWaysOfSameType.length === 0) return [];
              var attachedOneways = attachedWaysOfSameType.filter(function (attachedWay) {
                return isOneway(attachedWay);
              }); // ignore if the way is connected to some non-oneway features

              if (attachedOneways.length < attachedWaysOfSameType.length) return [];

              if (attachedOneways.length) {
                var connectedEndpointsOkay = attachedOneways.some(function (attachedOneway) {
                  if ((isFirst ? attachedOneway.first() : attachedOneway.last()) !== nodeID) return true;
                  if (nodeOccursMoreThanOnce(attachedOneway, nodeID)) return true;
                  return false;
                });
                if (connectedEndpointsOkay) return [];
              }

              var placement = isFirst ? 'start' : 'end',
                  messageID = wayType + '.',
                  referenceID = wayType + '.';

              if (wayType === 'waterway') {
                messageID += 'connected.' + placement;
                referenceID += 'connected';
              } else {
                messageID += placement;
                referenceID += placement;
              }

              return [new validationIssue({
                type: type,
                subtype: wayType,
                severity: 'warning',
                message: function message(context) {
                  var entity = context.hasEntity(this.entityIds[0]);
                  return entity ? _t.html('issues.impossible_oneway.' + messageID + '.message', {
                    feature: utilDisplayLabel(entity, context.graph())
                  }) : '';
                },
                reference: getReference(referenceID),
                entityIds: [way.id, node.id],
                dynamicFixes: function dynamicFixes() {
                  var fixes = [];

                  if (attachedOneways.length) {
                    fixes.push(new validationIssueFix({
                      icon: 'iD-operation-reverse',
                      title: _t.html('issues.fix.reverse_feature.title'),
                      entityIds: [way.id],
                      onClick: function onClick(context) {
                        var id = this.issue.entityIds[0];
                        context.perform(actionReverse(id), _t('operations.reverse.annotation.line', {
                          n: 1
                        }));
                      }
                    }));
                  }

                  if (node.tags.noexit !== 'yes') {
                    var textDirection = _mainLocalizer.textDirection();
                    var useLeftContinue = isFirst && textDirection === 'ltr' || !isFirst && textDirection === 'rtl';
                    fixes.push(new validationIssueFix({
                      icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
                      title: _t.html('issues.fix.continue_from_' + (isFirst ? 'start' : 'end') + '.title'),
                      onClick: function onClick(context) {
                        var entityID = this.issue.entityIds[0];
                        var vertexID = this.issue.entityIds[1];
                        var way = context.entity(entityID);
                        var vertex = context.entity(vertexID);
                        continueDrawing(way, vertex, context);
                      }
                    }));
                  }

                  return fixes;
                },
                loc: node.loc
              })];

              function getReference(referenceID) {
                return function showReference(selection) {
                  selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.impossible_oneway.' + referenceID + '.reference'));
                };
              }
            }
          };

          function continueDrawing(way, vertex, context) {
            // make sure the vertex is actually visible and editable
            var map = context.map();

            if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
              map.zoomToEase(vertex);
            }

            context.enter(modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true));
          }

          validation.type = type;
          return validation;
        }

        function validationIncompatibleSource() {
          var type = 'incompatible_source';
          var invalidSources = [{
            id: 'google',
            regex: 'google',
            exceptRegex: 'books.google|Google Books|drive.google|googledrive|Google Drive'
          }];

          var validation = function checkIncompatibleSource(entity) {
            var entitySources = entity.tags && entity.tags.source && entity.tags.source.split(';');
            if (!entitySources) return [];
            var issues = [];
            invalidSources.forEach(function (invalidSource) {
              var hasInvalidSource = entitySources.some(function (source) {
                if (!source.match(new RegExp(invalidSource.regex, 'i'))) return false;
                if (invalidSource.exceptRegex && source.match(new RegExp(invalidSource.exceptRegex, 'i'))) return false;
                return true;
              });
              if (!hasInvalidSource) return;
              issues.push(new validationIssue({
                type: type,
                severity: 'warning',
                message: function message(context) {
                  var entity = context.hasEntity(this.entityIds[0]);
                  return entity ? _t.html('issues.incompatible_source.' + invalidSource.id + '.feature.message', {
                    feature: utilDisplayLabel(entity, context.graph(), true
                    /* verbose */
                    )
                  }) : '';
                },
                reference: getReference(invalidSource.id),
                entityIds: [entity.id],
                dynamicFixes: function dynamicFixes() {
                  return [new validationIssueFix({
                    title: _t.html('issues.fix.remove_proprietary_data.title')
                  })];
                }
              }));
            });
            return issues;

            function getReference(id) {
              return function showReference(selection) {
                selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.incompatible_source.' + id + '.reference'));
              };
            }
          };

          validation.type = type;
          return validation;
        }

        function validationMaprules() {
          var type = 'maprules';

          var validation = function checkMaprules(entity, graph) {
            if (!services.maprules) return [];
            var rules = services.maprules.validationRules();
            var issues = [];

            for (var i = 0; i < rules.length; i++) {
              var rule = rules[i];
              rule.findIssues(entity, graph, issues);
            }

            return issues;
          };

          validation.type = type;
          return validation;
        }

        function validationMismatchedGeometry() {
          var type = 'mismatched_geometry';

          function tagSuggestingLineIsArea(entity) {
            if (entity.type !== 'way' || entity.isClosed()) return null;
            var tagSuggestingArea = entity.tagSuggestingArea();

            if (!tagSuggestingArea) {
              return null;
            }

            var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
            var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');

            if (asLine && asArea && asLine === asArea) {
              // these tags also allow lines and making this an area wouldn't matter
              return null;
            }

            return tagSuggestingArea;
          }

          function makeConnectEndpointsFixOnClick(way, graph) {
            // must have at least three nodes to close this automatically
            if (way.nodes.length < 3) return null;
            var nodes = graph.childNodes(way),
                testNodes;
            var firstToLastDistanceMeters = geoSphericalDistance(nodes[0].loc, nodes[nodes.length - 1].loc); // if the distance is very small, attempt to merge the endpoints

            if (firstToLastDistanceMeters < 0.75) {
              testNodes = nodes.slice(); // shallow copy

              testNodes.pop();
              testNodes.push(testNodes[0]); // make sure this will not create a self-intersection

              if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
                return function (context) {
                  var way = context.entity(this.issue.entityIds[0]);
                  context.perform(actionMergeNodes([way.nodes[0], way.nodes[way.nodes.length - 1]], nodes[0].loc), _t('issues.fix.connect_endpoints.annotation'));
                };
              }
            } // if the points were not merged, attempt to close the way


            testNodes = nodes.slice(); // shallow copy

            testNodes.push(testNodes[0]); // make sure this will not create a self-intersection

            if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
              return function (context) {
                var wayId = this.issue.entityIds[0];
                var way = context.entity(wayId);
                var nodeId = way.nodes[0];
                var index = way.nodes.length;
                context.perform(actionAddVertex(wayId, nodeId, index), _t('issues.fix.connect_endpoints.annotation'));
              };
            }
          }

          function lineTaggedAsAreaIssue(entity) {
            var tagSuggestingArea = tagSuggestingLineIsArea(entity);
            if (!tagSuggestingArea) return null;
            return new validationIssue({
              type: type,
              subtype: 'area_as_line',
              severity: 'warning',
              message: function message(context) {
                var entity = context.hasEntity(this.entityIds[0]);
                return entity ? _t.html('issues.tag_suggests_area.message', {
                  feature: utilDisplayLabel(entity, 'area', true
                  /* verbose */
                  ),
                  tag: utilTagText({
                    tags: tagSuggestingArea
                  })
                }) : '';
              },
              reference: showReference,
              entityIds: [entity.id],
              hash: JSON.stringify(tagSuggestingArea),
              dynamicFixes: function dynamicFixes(context) {
                var fixes = [];
                var entity = context.entity(this.entityIds[0]);
                var connectEndsOnClick = makeConnectEndpointsFixOnClick(entity, context.graph());
                fixes.push(new validationIssueFix({
                  title: _t.html('issues.fix.connect_endpoints.title'),
                  onClick: connectEndsOnClick
                }));
                fixes.push(new validationIssueFix({
                  icon: 'iD-operation-delete',
                  title: _t.html('issues.fix.remove_tag.title'),
                  onClick: function onClick(context) {
                    var entityId = this.issue.entityIds[0];
                    var entity = context.entity(entityId);
                    var tags = Object.assign({}, entity.tags); // shallow copy

                    for (var key in tagSuggestingArea) {
                      delete tags[key];
                    }

                    context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_tag.annotation'));
                  }
                }));
                return fixes;
              }
            });

            function showReference(selection) {
              selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.tag_suggests_area.reference'));
            }
          }

          function vertexPointIssue(entity, graph) {
            // we only care about nodes
            if (entity.type !== 'node') return null; // ignore tagless points

            if (Object.keys(entity.tags).length === 0) return null; // address lines are special so just ignore them

            if (entity.isOnAddressLine(graph)) return null;
            var geometry = entity.geometry(graph);
            var allowedGeometries = osmNodeGeometriesForTags(entity.tags);

            if (geometry === 'point' && !allowedGeometries.point && allowedGeometries.vertex) {
              return new validationIssue({
                type: type,
                subtype: 'vertex_as_point',
                severity: 'warning',
                message: function message(context) {
                  var entity = context.hasEntity(this.entityIds[0]);
                  return entity ? _t.html('issues.vertex_as_point.message', {
                    feature: utilDisplayLabel(entity, 'vertex', true
                    /* verbose */
                    )
                  }) : '';
                },
                reference: function showReference(selection) {
                  selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.vertex_as_point.reference'));
                },
                entityIds: [entity.id]
              });
            } else if (geometry === 'vertex' && !allowedGeometries.vertex && allowedGeometries.point) {
              return new validationIssue({
                type: type,
                subtype: 'point_as_vertex',
                severity: 'warning',
                message: function message(context) {
                  var entity = context.hasEntity(this.entityIds[0]);
                  return entity ? _t.html('issues.point_as_vertex.message', {
                    feature: utilDisplayLabel(entity, 'point', true
                    /* verbose */
                    )
                  }) : '';
                },
                reference: function showReference(selection) {
                  selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.point_as_vertex.reference'));
                },
                entityIds: [entity.id],
                dynamicFixes: extractPointDynamicFixes
              });
            }

            return null;
          }

          function otherMismatchIssue(entity, graph) {
            // ignore boring features
            if (!entity.hasInterestingTags()) return null;
            if (entity.type !== 'node' && entity.type !== 'way') return null; // address lines are special so just ignore them

            if (entity.type === 'node' && entity.isOnAddressLine(graph)) return null;
            var sourceGeom = entity.geometry(graph);
            var targetGeoms = entity.type === 'way' ? ['point', 'vertex'] : ['line', 'area'];
            if (sourceGeom === 'area') targetGeoms.unshift('line');
            var targetGeom = targetGeoms.find(function (nodeGeom) {
              var asSource = _mainPresetIndex.matchTags(entity.tags, sourceGeom);
              var asTarget = _mainPresetIndex.matchTags(entity.tags, nodeGeom);
              if (!asSource || !asTarget || asSource === asTarget || // sometimes there are two presets with the same tags for different geometries
              fastDeepEqual(asSource.tags, asTarget.tags)) return false;
              if (asTarget.isFallback()) return false;
              var primaryKey = Object.keys(asTarget.tags)[0]; // special case: buildings-as-points are discouraged by iD, but common in OSM, so ignore them

              if (primaryKey === 'building') return false;
              if (asTarget.tags[primaryKey] === '*') return false;
              return asSource.isFallback() || asSource.tags[primaryKey] === '*';
            });
            if (!targetGeom) return null;
            var subtype = targetGeom + '_as_' + sourceGeom;
            if (targetGeom === 'vertex') targetGeom = 'point';
            if (sourceGeom === 'vertex') sourceGeom = 'point';
            var referenceId = targetGeom + '_as_' + sourceGeom;
            var dynamicFixes;

            if (targetGeom === 'point') {
              dynamicFixes = extractPointDynamicFixes;
            } else if (sourceGeom === 'area' && targetGeom === 'line') {
              dynamicFixes = lineToAreaDynamicFixes;
            }

            return new validationIssue({
              type: type,
              subtype: subtype,
              severity: 'warning',
              message: function message(context) {
                var entity = context.hasEntity(this.entityIds[0]);
                return entity ? _t.html('issues.' + referenceId + '.message', {
                  feature: utilDisplayLabel(entity, targetGeom, true
                  /* verbose */
                  )
                }) : '';
              },
              reference: function showReference(selection) {
                selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.mismatched_geometry.reference'));
              },
              entityIds: [entity.id],
              dynamicFixes: dynamicFixes
            });
          }

          function lineToAreaDynamicFixes(context) {
            var convertOnClick;
            var entityId = this.entityIds[0];
            var entity = context.entity(entityId);
            var tags = Object.assign({}, entity.tags); // shallow copy

            delete tags.area;

            if (!osmTagSuggestingArea(tags)) {
              // if removing the area tag would make this a line, offer that as a quick fix
              convertOnClick = function convertOnClick(context) {
                var entityId = this.issue.entityIds[0];
                var entity = context.entity(entityId);
                var tags = Object.assign({}, entity.tags); // shallow copy

                if (tags.area) {
                  delete tags.area;
                }

                context.perform(actionChangeTags(entityId, tags), _t('issues.fix.convert_to_line.annotation'));
              };
            }

            return [new validationIssueFix({
              icon: 'iD-icon-line',
              title: _t.html('issues.fix.convert_to_line.title'),
              onClick: convertOnClick
            })];
          }

          function extractPointDynamicFixes(context) {
            var entityId = this.entityIds[0];
            var extractOnClick = null;

            if (!context.hasHiddenConnections(entityId)) {
              extractOnClick = function extractOnClick(context) {
                var entityId = this.issue.entityIds[0];
                var action = actionExtract(entityId, context.projection);
                context.perform(action, _t('operations.extract.annotation', {
                  n: 1
                })); // re-enter mode to trigger updates

                context.enter(modeSelect(context, [action.getExtractedNodeID()]));
              };
            }

            return [new validationIssueFix({
              icon: 'iD-operation-extract',
              title: _t.html('issues.fix.extract_point.title'),
              onClick: extractOnClick
            })];
          }

          function unclosedMultipolygonPartIssues(entity, graph) {
            if (entity.type !== 'relation' || !entity.isMultipolygon() || entity.isDegenerate() || // cannot determine issues for incompletely-downloaded relations
            !entity.isComplete(graph)) return [];
            var sequences = osmJoinWays(entity.members, graph);
            var issues = [];

            for (var i in sequences) {
              var sequence = sequences[i];
              if (!sequence.nodes) continue;
              var firstNode = sequence.nodes[0];
              var lastNode = sequence.nodes[sequence.nodes.length - 1]; // part is closed if the first and last nodes are the same

              if (firstNode === lastNode) continue;
              var issue = new validationIssue({
                type: type,
                subtype: 'unclosed_multipolygon_part',
                severity: 'warning',
                message: function message(context) {
                  var entity = context.hasEntity(this.entityIds[0]);
                  return entity ? _t.html('issues.unclosed_multipolygon_part.message', {
                    feature: utilDisplayLabel(entity, context.graph(), true
                    /* verbose */
                    )
                  }) : '';
                },
                reference: showReference,
                loc: sequence.nodes[0].loc,
                entityIds: [entity.id],
                hash: sequence.map(function (way) {
                  return way.id;
                }).join()
              });
              issues.push(issue);
            }

            return issues;

            function showReference(selection) {
              selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unclosed_multipolygon_part.reference'));
            }
          }

          var validation = function checkMismatchedGeometry(entity, graph) {
            var vertexPoint = vertexPointIssue(entity, graph);
            if (vertexPoint) return [vertexPoint];
            var lineAsArea = lineTaggedAsAreaIssue(entity);
            if (lineAsArea) return [lineAsArea];
            var mismatch = otherMismatchIssue(entity, graph);
            if (mismatch) return [mismatch];
            return unclosedMultipolygonPartIssues(entity, graph);
          };

          validation.type = type;
          return validation;
        }

        function validationMissingRole() {
          var type = 'missing_role';

          var validation = function checkMissingRole(entity, graph) {
            var issues = [];

            if (entity.type === 'way') {
              graph.parentRelations(entity).forEach(function (relation) {
                if (!relation.isMultipolygon()) return;
                var member = relation.memberById(entity.id);

                if (member && isMissingRole(member)) {
                  issues.push(makeIssue(entity, relation, member));
                }
              });
            } else if (entity.type === 'relation' && entity.isMultipolygon()) {
              entity.indexedMembers().forEach(function (member) {
                var way = graph.hasEntity(member.id);

                if (way && isMissingRole(member)) {
                  issues.push(makeIssue(way, entity, member));
                }
              });
            }

            return issues;
          };

          function isMissingRole(member) {
            return !member.role || !member.role.trim().length;
          }

          function makeIssue(way, relation, member) {
            return new validationIssue({
              type: type,
              severity: 'warning',
              message: function message(context) {
                var member = context.hasEntity(this.entityIds[1]),
                    relation = context.hasEntity(this.entityIds[0]);
                return member && relation ? _t.html('issues.missing_role.message', {
                  member: utilDisplayLabel(member, context.graph()),
                  relation: utilDisplayLabel(relation, context.graph())
                }) : '';
              },
              reference: showReference,
              entityIds: [relation.id, way.id],
              data: {
                member: member
              },
              hash: member.index.toString(),
              dynamicFixes: function dynamicFixes() {
                return [makeAddRoleFix('inner'), makeAddRoleFix('outer'), new validationIssueFix({
                  icon: 'iD-operation-delete',
                  title: _t.html('issues.fix.remove_from_relation.title'),
                  onClick: function onClick(context) {
                    context.perform(actionDeleteMember(this.issue.entityIds[0], this.issue.data.member.index), _t('operations.delete_member.annotation', {
                      n: 1
                    }));
                  }
                })];
              }
            });

            function showReference(selection) {
              selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.missing_role.multipolygon.reference'));
            }
          }

          function makeAddRoleFix(role) {
            return new validationIssueFix({
              title: _t.html('issues.fix.set_as_' + role + '.title'),
              onClick: function onClick(context) {
                var oldMember = this.issue.data.member;
                var member = {
                  id: this.issue.entityIds[1],
                  type: oldMember.type,
                  role: role
                };
                context.perform(actionChangeMember(this.issue.entityIds[0], member, oldMember.index), _t('operations.change_role.annotation', {
                  n: 1
                }));
              }
            });
          }

          validation.type = type;
          return validation;
        }

        function validationMissingTag(context) {
          var type = 'missing_tag';

          function hasDescriptiveTags(entity, graph) {
            var onlyAttributeKeys = ['description', 'name', 'note', 'start_date'];
            var entityDescriptiveKeys = Object.keys(entity.tags).filter(function (k) {
              if (k === 'area' || !osmIsInterestingTag(k)) return false;
              return !onlyAttributeKeys.some(function (attributeKey) {
                return k === attributeKey || k.indexOf(attributeKey + ':') === 0;
              });
            });

            if (entity.type === 'relation' && entityDescriptiveKeys.length === 1 && entity.tags.type === 'multipolygon') {
              // this relation's only interesting tag just says its a multipolygon,
              // which is not descriptive enough
              // It's okay for a simple multipolygon to have no descriptive tags
              // if its outer way has them (old model, see `outdated_tags.js`)
              return osmOldMultipolygonOuterMemberOfRelation(entity, graph);
            }

            return entityDescriptiveKeys.length > 0;
          }

          function isUnknownRoad(entity) {
            return entity.type === 'way' && entity.tags.highway === 'road';
          }

          function isUntypedRelation(entity) {
            return entity.type === 'relation' && !entity.tags.type;
          }

          var validation = function checkMissingTag(entity, graph) {
            var subtype;
            var osm = context.connection();
            var isUnloadedNode = entity.type === 'node' && osm && !osm.isDataLoaded(entity.loc); // we can't know if the node is a vertex if the tile is undownloaded

            if (!isUnloadedNode && // allow untagged nodes that are part of ways
            entity.geometry(graph) !== 'vertex' && // allow untagged entities that are part of relations
            !entity.hasParentRelations(graph)) {
              if (Object.keys(entity.tags).length === 0) {
                subtype = 'any';
              } else if (!hasDescriptiveTags(entity, graph)) {
                subtype = 'descriptive';
              } else if (isUntypedRelation(entity)) {
                subtype = 'relation_type';
              }
            } // flag an unknown road even if it's a member of a relation


            if (!subtype && isUnknownRoad(entity)) {
              subtype = 'highway_classification';
            }

            if (!subtype) return [];
            var messageID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag.' + subtype;
            var referenceID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag'; // can always delete if the user created it in the first place..

            var canDelete = entity.version === undefined || entity.v !== undefined;
            var severity = canDelete && subtype !== 'highway_classification' ? 'error' : 'warning';
            return [new validationIssue({
              type: type,
              subtype: subtype,
              severity: severity,
              message: function message(context) {
                var entity = context.hasEntity(this.entityIds[0]);
                return entity ? _t.html('issues.' + messageID + '.message', {
                  feature: utilDisplayLabel(entity, context.graph())
                }) : '';
              },
              reference: showReference,
              entityIds: [entity.id],
              dynamicFixes: function dynamicFixes(context) {
                var fixes = [];
                var selectFixType = subtype === 'highway_classification' ? 'select_road_type' : 'select_preset';
                fixes.push(new validationIssueFix({
                  icon: 'iD-icon-search',
                  title: _t.html('issues.fix.' + selectFixType + '.title'),
                  onClick: function onClick(context) {
                    context.ui().sidebar.showPresetList();
                  }
                }));
                var deleteOnClick;
                var id = this.entityIds[0];
                var operation = operationDelete(context, [id]);
                var disabledReasonID = operation.disabled();

                if (!disabledReasonID) {
                  deleteOnClick = function deleteOnClick(context) {
                    var id = this.issue.entityIds[0];
                    var operation = operationDelete(context, [id]);

                    if (!operation.disabled()) {
                      operation();
                    }
                  };
                }

                fixes.push(new validationIssueFix({
                  icon: 'iD-operation-delete',
                  title: _t.html('issues.fix.delete_feature.title'),
                  disabledReason: disabledReasonID ? _t('operations.delete.' + disabledReasonID + '.single') : undefined,
                  onClick: deleteOnClick
                }));
                return fixes;
              }
            })];

            function showReference(selection) {
              selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.' + referenceID + '.reference'));
            }
          };

          validation.type = type;
          return validation;
        }

        function validationOutdatedTags() {
          var type = 'outdated_tags';
          var _waitingForDeprecated = true;

          var _dataDeprecated; // fetch deprecated tags


          _mainFileFetcher.get('deprecated').then(function (d) {
            return _dataDeprecated = d;
          })["catch"](function () {
            /* ignore */
          })["finally"](function () {
            return _waitingForDeprecated = false;
          });

          function oldTagIssues(entity, graph) {
            var oldTags = Object.assign({}, entity.tags); // shallow copy

            var preset = _mainPresetIndex.match(entity, graph);
            var subtype = 'deprecated_tags';
            if (!preset) return [];
            if (!entity.hasInterestingTags()) return []; // Upgrade preset, if a replacement is available..

            if (preset.replacement) {
              var newPreset = _mainPresetIndex.item(preset.replacement);
              graph = actionChangePreset(entity.id, preset, newPreset, true
              /* skip field defaults */
              )(graph);
              entity = graph.entity(entity.id);
              preset = newPreset;
            } // Upgrade deprecated tags..


            if (_dataDeprecated) {
              var deprecatedTags = entity.deprecatedTags(_dataDeprecated);

              if (deprecatedTags.length) {
                deprecatedTags.forEach(function (tag) {
                  graph = actionUpgradeTags(entity.id, tag.old, tag.replace)(graph);
                });
                entity = graph.entity(entity.id);
              }
            } // Add missing addTags from the detected preset


            var newTags = Object.assign({}, entity.tags); // shallow copy

            if (preset.tags !== preset.addTags) {
              Object.keys(preset.addTags).forEach(function (k) {
                if (!newTags[k]) {
                  if (preset.addTags[k] === '*') {
                    newTags[k] = 'yes';
                  } else {
                    newTags[k] = preset.addTags[k];
                  }
                }
              });
            } // Attempt to match a canonical record in the name-suggestion-index.


            var nsi = services.nsi;
            var waitingForNsi = false;

            if (nsi) {
              waitingForNsi = nsi.status() === 'loading';

              if (!waitingForNsi) {
                var loc = entity.extent(graph).center();
                var result = nsi.upgradeTags(newTags, loc);

                if (result) {
                  newTags = result;
                  subtype = 'noncanonical_brand';
                }
              }
            }

            var issues = [];
            issues.provisional = _waitingForDeprecated || waitingForNsi; // determine diff

            var tagDiff = utilTagDiff(oldTags, newTags);
            if (!tagDiff.length) return issues;
            var isOnlyAddingTags = tagDiff.every(function (d) {
              return d.type === '+';
            });
            var prefix = '';

            if (subtype === 'noncanonical_brand') {
              prefix = 'noncanonical_brand.';
            } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
              subtype = 'incomplete_tags';
              prefix = 'incomplete.';
            } // don't allow autofixing brand tags


            var autoArgs = subtype !== 'noncanonical_brand' ? [doUpgrade, _t('issues.fix.upgrade_tags.annotation')] : null;
            issues.push(new validationIssue({
              type: type,
              subtype: subtype,
              severity: 'warning',
              message: showMessage,
              reference: showReference,
              entityIds: [entity.id],
              hash: utilHashcode(JSON.stringify(tagDiff)),
              dynamicFixes: function dynamicFixes() {
                return [new validationIssueFix({
                  autoArgs: autoArgs,
                  title: _t.html('issues.fix.upgrade_tags.title'),
                  onClick: function onClick(context) {
                    context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
                  }
                })];
              }
            }));
            return issues;

            function doUpgrade(graph) {
              var currEntity = graph.hasEntity(entity.id);
              if (!currEntity) return graph;
              var newTags = Object.assign({}, currEntity.tags); // shallow copy

              tagDiff.forEach(function (diff) {
                if (diff.type === '-') {
                  delete newTags[diff.key];
                } else if (diff.type === '+') {
                  newTags[diff.key] = diff.newVal;
                }
              });
              return actionChangeTags(currEntity.id, newTags)(graph);
            }

            function showMessage(context) {
              var currEntity = context.hasEntity(entity.id);
              if (!currEntity) return '';
              var messageID = "issues.outdated_tags.".concat(prefix, "message");

              if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
                messageID += '_incomplete';
              }

              return _t.html(messageID, {
                feature: utilDisplayLabel(currEntity, context.graph(), true
                /* verbose */
                )
              });
            }

            function showReference(selection) {
              var enter = selection.selectAll('.issue-reference').data([0]).enter();
              enter.append('div').attr('class', 'issue-reference').html(_t.html("issues.outdated_tags.".concat(prefix, "reference")));
              enter.append('strong').html(_t.html('issues.suggested'));
              enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
                var klass = d.type === '+' ? 'add' : 'remove';
                return "tagDiff-cell tagDiff-cell-".concat(klass);
              }).html(function (d) {
                return d.display;
              });
            }
          }

          function oldMultipolygonIssues(entity, graph) {
            var multipolygon, outerWay;

            if (entity.type === 'relation') {
              outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
              multipolygon = entity;
            } else if (entity.type === 'way') {
              multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
              outerWay = entity;
            } else {
              return [];
            }

            if (!multipolygon || !outerWay) return [];
            return [new validationIssue({
              type: type,
              subtype: 'old_multipolygon',
              severity: 'warning',
              message: showMessage,
              reference: showReference,
              entityIds: [outerWay.id, multipolygon.id],
              dynamicFixes: function dynamicFixes() {
                return [new validationIssueFix({
                  autoArgs: [doUpgrade, _t('issues.fix.move_tags.annotation')],
                  title: _t.html('issues.fix.move_tags.title'),
                  onClick: function onClick(context) {
                    context.perform(doUpgrade, _t('issues.fix.move_tags.annotation'));
                  }
                })];
              }
            })];

            function doUpgrade(graph) {
              var currMultipolygon = graph.hasEntity(multipolygon.id);
              var currOuterWay = graph.hasEntity(outerWay.id);
              if (!currMultipolygon || !currOuterWay) return graph;
              currMultipolygon = currMultipolygon.mergeTags(currOuterWay.tags);
              graph = graph.replace(currMultipolygon);
              return actionChangeTags(currOuterWay.id, {})(graph);
            }

            function showMessage(context) {
              var currMultipolygon = context.hasEntity(multipolygon.id);
              if (!currMultipolygon) return '';
              return _t.html('issues.old_multipolygon.message', {
                multipolygon: utilDisplayLabel(currMultipolygon, context.graph(), true
                /* verbose */
                )
              });
            }

            function showReference(selection) {
              selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.old_multipolygon.reference'));
            }
          }

          var validation = function checkOutdatedTags(entity, graph) {
            var issues = oldMultipolygonIssues(entity, graph);
            if (!issues.length) issues = oldTagIssues(entity, graph);
            return issues;
          };

          validation.type = type;
          return validation;
        }

        function validationPrivateData() {
          var type = 'private_data'; // assume that some buildings are private

          var privateBuildingValues = {
            detached: true,
            farm: true,
            house: true,
            houseboat: true,
            residential: true,
            semidetached_house: true,
            static_caravan: true
          }; // but they might be public if they have one of these other tags

          var publicKeys = {
            amenity: true,
            craft: true,
            historic: true,
            leisure: true,
            office: true,
            shop: true,
            tourism: true
          }; // these tags may contain personally identifying info

          var personalTags = {
            'contact:email': true,
            'contact:fax': true,
            'contact:phone': true,
            email: true,
            fax: true,
            phone: true
          };

          var validation = function checkPrivateData(entity) {
            var tags = entity.tags;
            if (!tags.building || !privateBuildingValues[tags.building]) return [];
            var keepTags = {};

            for (var k in tags) {
              if (publicKeys[k]) return []; // probably a public feature

              if (!personalTags[k]) {
                keepTags[k] = tags[k];
              }
            }

            var tagDiff = utilTagDiff(tags, keepTags);
            if (!tagDiff.length) return [];
            var fixID = tagDiff.length === 1 ? 'remove_tag' : 'remove_tags';
            return [new validationIssue({
              type: type,
              severity: 'warning',
              message: showMessage,
              reference: showReference,
              entityIds: [entity.id],
              dynamicFixes: function dynamicFixes() {
                return [new validationIssueFix({
                  icon: 'iD-operation-delete',
                  title: _t.html('issues.fix.' + fixID + '.title'),
                  onClick: function onClick(context) {
                    context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
                  }
                })];
              }
            })];

            function doUpgrade(graph) {
              var currEntity = graph.hasEntity(entity.id);
              if (!currEntity) return graph;
              var newTags = Object.assign({}, currEntity.tags); // shallow copy

              tagDiff.forEach(function (diff) {
                if (diff.type === '-') {
                  delete newTags[diff.key];
                } else if (diff.type === '+') {
                  newTags[diff.key] = diff.newVal;
                }
              });
              return actionChangeTags(currEntity.id, newTags)(graph);
            }

            function showMessage(context) {
              var currEntity = context.hasEntity(this.entityIds[0]);
              if (!currEntity) return '';
              return _t.html('issues.private_data.contact.message', {
                feature: utilDisplayLabel(currEntity, context.graph())
              });
            }

            function showReference(selection) {
              var enter = selection.selectAll('.issue-reference').data([0]).enter();
              enter.append('div').attr('class', 'issue-reference').html(_t.html('issues.private_data.reference'));
              enter.append('strong').html(_t.html('issues.suggested'));
              enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
                var klass = d.type === '+' ? 'add' : 'remove';
                return 'tagDiff-cell tagDiff-cell-' + klass;
              }).html(function (d) {
                return d.display;
              });
            }
          };

          validation.type = type;
          return validation;
        }

        function validationSuspiciousName() {
          var type = 'suspicious_name';
          var keysToTestForGenericValues = ['aerialway', 'aeroway', 'amenity', 'building', 'craft', 'highway', 'leisure', 'railway', 'man_made', 'office', 'shop', 'tourism', 'waterway'];
          var _waitingForNsi = false; // Attempt to match a generic record in the name-suggestion-index.

          function isGenericMatchInNsi(tags) {
            var nsi = services.nsi;

            if (nsi) {
              _waitingForNsi = nsi.status() === 'loading';

              if (!_waitingForNsi) {
                return nsi.isGenericName(tags);
              }
            }

            return false;
          } // Test if the name is just the key or tag value (e.g. "park")


          function nameMatchesRawTag(lowercaseName, tags) {
            for (var i = 0; i < keysToTestForGenericValues.length; i++) {
              var key = keysToTestForGenericValues[i];
              var val = tags[key];

              if (val) {
                val = val.toLowerCase();

                if (key === lowercaseName || val === lowercaseName || key.replace(/\_/g, ' ') === lowercaseName || val.replace(/\_/g, ' ') === lowercaseName) {
                  return true;
                }
              }
            }

            return false;
          }

          function isGenericName(name, tags) {
            name = name.toLowerCase();
            return nameMatchesRawTag(name, tags) || isGenericMatchInNsi(tags);
          }

          function makeGenericNameIssue(entityId, nameKey, genericName, langCode) {
            return new validationIssue({
              type: type,
              subtype: 'generic_name',
              severity: 'warning',
              message: function message(context) {
                var entity = context.hasEntity(this.entityIds[0]);
                if (!entity) return '';
                var preset = _mainPresetIndex.match(entity, context.graph());
                var langName = langCode && _mainLocalizer.languageName(langCode);
                return _t.html('issues.generic_name.message' + (langName ? '_language' : ''), {
                  feature: preset.name(),
                  name: genericName,
                  language: langName
                });
              },
              reference: showReference,
              entityIds: [entityId],
              hash: "".concat(nameKey, "=").concat(genericName),
              dynamicFixes: function dynamicFixes() {
                return [new validationIssueFix({
                  icon: 'iD-operation-delete',
                  title: _t.html('issues.fix.remove_the_name.title'),
                  onClick: function onClick(context) {
                    var entityId = this.issue.entityIds[0];
                    var entity = context.entity(entityId);
                    var tags = Object.assign({}, entity.tags); // shallow copy

                    delete tags[nameKey];
                    context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation'));
                  }
                })];
              }
            });

            function showReference(selection) {
              selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
            }
          }

          function makeIncorrectNameIssue(entityId, nameKey, incorrectName, langCode) {
            return new validationIssue({
              type: type,
              subtype: 'not_name',
              severity: 'warning',
              message: function message(context) {
                var entity = context.hasEntity(this.entityIds[0]);
                if (!entity) return '';
                var preset = _mainPresetIndex.match(entity, context.graph());
                var langName = langCode && _mainLocalizer.languageName(langCode);
                return _t.html('issues.incorrect_name.message' + (langName ? '_language' : ''), {
                  feature: preset.name(),
                  name: incorrectName,
                  language: langName
                });
              },
              reference: showReference,
              entityIds: [entityId],
              hash: "".concat(nameKey, "=").concat(incorrectName),
              dynamicFixes: function dynamicFixes() {
                return [new validationIssueFix({
                  icon: 'iD-operation-delete',
                  title: _t.html('issues.fix.remove_the_name.title'),
                  onClick: function onClick(context) {
                    var entityId = this.issue.entityIds[0];
                    var entity = context.entity(entityId);
                    var tags = Object.assign({}, entity.tags); // shallow copy

                    delete tags[nameKey];
                    context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation'));
                  }
                })];
              }
            });

            function showReference(selection) {
              selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
            }
          }

          var validation = function checkGenericName(entity) {
            var tags = entity.tags; // a generic name is allowed if it's a known brand or entity

            var hasWikidata = !!tags.wikidata || !!tags['brand:wikidata'] || !!tags['operator:wikidata'];
            if (hasWikidata) return [];
            var issues = [];
            var notNames = (tags['not:name'] || '').split(';');

            for (var key in tags) {
              var m = key.match(/^name(?:(?::)([a-zA-Z_-]+))?$/);
              if (!m) continue;
              var langCode = m.length >= 2 ? m[1] : null;
              var value = tags[key];

              if (notNames.length) {
                for (var i in notNames) {
                  var notName = notNames[i];

                  if (notName && value === notName) {
                    issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
                    continue;
                  }
                }
              }

              if (isGenericName(value, tags)) {
                issues.provisional = _waitingForNsi; // retry later if we are waiting on NSI to finish loading

                issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
              }
            }

            return issues;
          };

          validation.type = type;
          return validation;
        }

        function validationUnsquareWay(context) {
          var type = 'unsquare_way';
          var DEFAULT_DEG_THRESHOLD = 5; // see also issues.js
          // use looser epsilon for detection to reduce warnings of buildings that are essentially square already

          var epsilon = 0.05;
          var nodeThreshold = 10;

          function isBuilding(entity, graph) {
            if (entity.type !== 'way' || entity.geometry(graph) !== 'area') return false;
            return entity.tags.building && entity.tags.building !== 'no';
          }

          var validation = function checkUnsquareWay(entity, graph) {
            if (!isBuilding(entity, graph)) return []; // don't flag ways marked as physically unsquare

            if (entity.tags.nonsquare === 'yes') return [];
            var isClosed = entity.isClosed();
            if (!isClosed) return []; // this building has bigger problems
            // don't flag ways with lots of nodes since they are likely detail-mapped

            var nodes = graph.childNodes(entity).slice(); // shallow copy

            if (nodes.length > nodeThreshold + 1) return []; // +1 because closing node appears twice
            // ignore if not all nodes are fully downloaded

            var osm = services.osm;
            if (!osm || nodes.some(function (node) {
              return !osm.isDataLoaded(node.loc);
            })) return []; // don't flag connected ways to avoid unresolvable unsquare loops

            var hasConnectedSquarableWays = nodes.some(function (node) {
              return graph.parentWays(node).some(function (way) {
                if (way.id === entity.id) return false;
                if (isBuilding(way, graph)) return true;
                return graph.parentRelations(way).some(function (parentRelation) {
                  return parentRelation.isMultipolygon() && parentRelation.tags.building && parentRelation.tags.building !== 'no';
                });
              });
            });
            if (hasConnectedSquarableWays) return []; // user-configurable square threshold

            var storedDegreeThreshold = corePreferences('validate-square-degrees');
            var degreeThreshold = isNaN(storedDegreeThreshold) ? DEFAULT_DEG_THRESHOLD : parseFloat(storedDegreeThreshold);
            var points = nodes.map(function (node) {
              return context.projection(node.loc);
            });
            if (!geoOrthoCanOrthogonalize(points, isClosed, epsilon, degreeThreshold, true)) return [];
            var autoArgs; // don't allow autosquaring features linked to wikidata

            if (!entity.tags.wikidata) {
              // use same degree threshold as for detection
              var autoAction = actionOrthogonalize(entity.id, context.projection, undefined, degreeThreshold);
              autoAction.transitionable = false; // when autofixing, do it instantly

              autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature', {
                n: 1
              })];
            }

            return [new validationIssue({
              type: type,
              subtype: 'building',
              severity: 'warning',
              message: function message(context) {
                var entity = context.hasEntity(this.entityIds[0]);
                return entity ? _t.html('issues.unsquare_way.message', {
                  feature: utilDisplayLabel(entity, context.graph())
                }) : '';
              },
              reference: showReference,
              entityIds: [entity.id],
              hash: degreeThreshold,
              dynamicFixes: function dynamicFixes() {
                return [new validationIssueFix({
                  icon: 'iD-operation-orthogonalize',
                  title: _t.html('issues.fix.square_feature.title'),
                  autoArgs: autoArgs,
                  onClick: function onClick(context, completionHandler) {
                    var entityId = this.issue.entityIds[0]; // use same degree threshold as for detection

                    context.perform(actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold), _t('operations.orthogonalize.annotation.feature', {
                      n: 1
                    })); // run after the squaring transition (currently 150ms)

                    window.setTimeout(function () {
                      completionHandler();
                    }, 175);
                  }
                })
                /*
                new validationIssueFix({
                    title: t.html('issues.fix.tag_as_unsquare.title'),
                    onClick: function(context) {
                        var entityId = this.issue.entityIds[0];
                        var entity = context.entity(entityId);
                        var tags = Object.assign({}, entity.tags);  // shallow copy
                        tags.nonsquare = 'yes';
                        context.perform(
                            actionChangeTags(entityId, tags),
                            t('issues.fix.tag_as_unsquare.annotation')
                        );
                    }
                })
                */
                ];
              }
            })];

            function showReference(selection) {
              selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unsquare_way.buildings.reference'));
            }
          };

          validation.type = type;
          return validation;
        }

        var Validations = /*#__PURE__*/Object.freeze({
                __proto__: null,
                validationAlmostJunction: validationAlmostJunction,
                validationCloseNodes: validationCloseNodes,
                validationCrossingWays: validationCrossingWays,
                validationDisconnectedWay: validationDisconnectedWay,
                validationFormatting: validationFormatting,
                validationHelpRequest: validationHelpRequest,
                validationImpossibleOneway: validationImpossibleOneway,
                validationIncompatibleSource: validationIncompatibleSource,
                validationMaprules: validationMaprules,
                validationMismatchedGeometry: validationMismatchedGeometry,
                validationMissingRole: validationMissingRole,
                validationMissingTag: validationMissingTag,
                validationOutdatedTags: validationOutdatedTags,
                validationPrivateData: validationPrivateData,
                validationSuspiciousName: validationSuspiciousName,
                validationUnsquareWay: validationUnsquareWay
        });

        function coreValidator(context) {
          var _this = this;

          var dispatch = dispatch$8('validated', 'focusedIssue');
          var validator = utilRebind({}, dispatch, 'on');
          var _rules = {};
          var _disabledRules = {};

          var _ignoredIssueIDs = new Set();

          var _resolvedIssueIDs = new Set();

          var _baseCache = validationCache('base'); // issues before any user edits


          var _headCache = validationCache('head'); // issues after all user edits


          var _completeDiff = {}; // complete diff base -> head of what the user changed

          var _headIsCurrent = false;

          var _deferredRIC = new Set(); // Set( RequestIdleCallback handles )


          var _deferredST = new Set(); // Set( SetTimeout handles )


          var _headPromise; // Promise fulfilled when validation is performed up to headGraph snapshot


          var RETRY = 5000; // wait 5sec before revalidating provisional entities
          // Allow validation severity to be overridden by url queryparams...
          // See: https://github.com/openstreetmap/iD/pull/8243
          //
          // Each param should contain a urlencoded comma separated list of
          // `type/subtype` rules.  `*` may be used as a wildcard..
          // Examples:
          //  `validationError=disconnected_way/*`
          //  `validationError=disconnected_way/highway`
          //  `validationError=crossing_ways/bridge*`
          //  `validationError=crossing_ways/bridge*,crossing_ways/tunnel*`

          var _errorOverrides = parseHashParam(context.initialHashParams.validationError);

          var _warningOverrides = parseHashParam(context.initialHashParams.validationWarning);

          var _disableOverrides = parseHashParam(context.initialHashParams.validationDisable); // `parseHashParam()`   (private)
          // Checks hash parameters for severity overrides
          // Arguments
          //   `param` - a url hash parameter (`validationError`, `validationWarning`, or `validationDisable`)
          // Returns
          //   Array of Objects like { type: RegExp, subtype: RegExp }
          //


          function parseHashParam(param) {
            var result = [];
            var rules = (param || '').split(',');
            rules.forEach(function (rule) {
              rule = rule.trim();
              var parts = rule.split('/', 2); // "type/subtype"

              var type = parts[0];
              var subtype = parts[1] || '*';
              if (!type || !subtype) return;
              result.push({
                type: makeRegExp(type),
                subtype: makeRegExp(subtype)
              });
            });
            return result;

            function makeRegExp(str) {
              var escaped = str.replace(/[-\/\\^$+?.()|[\]{}]/g, '\\$&') // escape all reserved chars except for the '*'
              .replace(/\*/g, '.*'); // treat a '*' like '.*'

              return new RegExp('^' + escaped + '$');
            }
          } // `init()`
          // Initialize the validator, called once on iD startup
          //


          validator.init = function () {
            Object.values(Validations).forEach(function (validation) {
              if (typeof validation !== 'function') return;
              var fn = validation(context);
              var key = fn.type;
              _rules[key] = fn;
            });
            var disabledRules = corePreferences('validate-disabledRules');

            if (disabledRules) {
              disabledRules.split(',').forEach(function (k) {
                return _disabledRules[k] = true;
              });
            }
          }; // `reset()`   (private)
          // Cancels deferred work and resets all caches
          //
          // Arguments
          //   `resetIgnored` - `true` to clear the list of user-ignored issues
          //


          function reset(resetIgnored) {
            // cancel deferred work
            _deferredRIC.forEach(window.cancelIdleCallback);

            _deferredRIC.clear();

            _deferredST.forEach(window.clearTimeout);

            _deferredST.clear(); // empty queues and resolve any pending promise


            _baseCache.queue = [];
            _headCache.queue = [];
            processQueue(_headCache);
            processQueue(_baseCache); // clear caches

            if (resetIgnored) _ignoredIssueIDs.clear();

            _resolvedIssueIDs.clear();

            _baseCache = validationCache('base');
            _headCache = validationCache('head');
            _completeDiff = {};
            _headIsCurrent = false;
          } // `reset()`
          // clear caches, called whenever iD resets after a save or switches sources
          // (clears out the _ignoredIssueIDs set also)
          //


          validator.reset = function () {
            reset(true);
          }; // `resetIgnoredIssues()`
          // clears out the _ignoredIssueIDs Set
          //


          validator.resetIgnoredIssues = function () {
            _ignoredIssueIDs.clear();

            dispatch.call('validated'); // redraw UI
          }; // `revalidateUnsquare()`
          // Called whenever the user changes the unsquare threshold
          // It reruns just the "unsquare_way" validation on all buildings.
          //


          validator.revalidateUnsquare = function () {
            revalidateUnsquare(_headCache);
            revalidateUnsquare(_baseCache);
            dispatch.call('validated');
          };

          function revalidateUnsquare(cache) {
            var checkUnsquareWay = _rules.unsquare_way;
            if (!cache.graph || typeof checkUnsquareWay !== 'function') return; // uncache existing

            cache.uncacheIssuesOfType('unsquare_way');
            var buildings = context.history().tree().intersects(geoExtent([-180, -90], [180, 90]), cache.graph) // everywhere
            .filter(function (entity) {
              return entity.type === 'way' && entity.tags.building && entity.tags.building !== 'no';
            }); // rerun for all buildings

            buildings.forEach(function (entity) {
              var detected = checkUnsquareWay(entity, cache.graph);
              if (!detected.length) return;
              cache.cacheIssues(detected);
            });
          } // `getIssues()`
          // Gets all issues that match the given options
          // This is called by many other places
          //
          // Arguments
          //   `options` Object like:
          //   {
          //     what: 'all',                  // 'all' or 'edited'
          //     where: 'all',                 // 'all' or 'visible'
          //     includeIgnored: false,        // true, false, or 'only'
          //     includeDisabledRules: false   // true, false, or 'only'
          //   }
          //
          // Returns
          //   An Array containing the issues
          //


          validator.getIssues = function (options) {
            var opts = Object.assign({
              what: 'all',
              where: 'all',
              includeIgnored: false,
              includeDisabledRules: false
            }, options);
            var view = context.map().extent();
            var seen = new Set();
            var results = []; // collect head issues - caused by user edits

            if (_headCache.graph && _headCache.graph !== _baseCache.graph) {
              Object.values(_headCache.issuesByIssueID).forEach(function (issue) {
                if (!filter(issue)) return;
                seen.add(issue.id);
                results.push(issue);
              });
            } // collect base issues - not caused by user edits


            if (opts.what === 'all') {
              Object.values(_baseCache.issuesByIssueID).forEach(function (issue) {
                if (!filter(issue)) return;
                seen.add(issue.id);
                results.push(issue);
              });
            }

            return results; // Filter the issue set to include only what the calling code wants to see.
            // Note that we use `context.graph()`/`context.hasEntity()` here, not `cache.graph`,
            // because that is the graph that the calling code will be using.

            function filter(issue) {
              if (!issue) return false;
              if (seen.has(issue.id)) return false;
              if (_resolvedIssueIDs.has(issue.id)) return false;
              if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) return false;
              if (!opts.includeDisabledRules && _disabledRules[issue.type]) return false;
              if (opts.includeIgnored === 'only' && !_ignoredIssueIDs.has(issue.id)) return false;
              if (!opts.includeIgnored && _ignoredIssueIDs.has(issue.id)) return false; // This issue may involve an entity that doesn't exist in context.graph()
              // This can happen because validation is async and rendering the issue lists is async.

              if ((issue.entityIds || []).some(function (id) {
                return !context.hasEntity(id);
              })) return false;

              if (opts.where === 'visible') {
                var extent = issue.extent(context.graph());
                if (!view.intersects(extent)) return false;
              }

              return true;
            }
          }; // `getResolvedIssues()`
          // Gets the issues that have been fixed by the user.
          //
          // Resolved issues are tracked in the `_resolvedIssueIDs` Set,
          // and they should all be issues that exist in the _baseCache.
          //
          // Returns
          //   An Array containing the issues
          //


          validator.getResolvedIssues = function () {
            return Array.from(_resolvedIssueIDs).map(function (issueID) {
              return _baseCache.issuesByIssueID[issueID];
            }).filter(Boolean);
          }; // `focusIssue()`
          // Adjusts the map to focus on the given issue.
          // (requires the issue to have a reasonable extent defined)
          //
          // Arguments
          //   `issue` - the issue to focus on
          //


          validator.focusIssue = function (issue) {
            // Note that we use `context.graph()`/`context.hasEntity()` here, not `cache.graph`,
            // because that is the graph that the calling code will be using.
            var graph = context.graph();
            var selectID;
            var focusCenter; // Try to focus the map at the center of the issue..

            var issueExtent = issue.extent(graph);

            if (issueExtent) {
              focusCenter = issueExtent.center();
            } // Try to select the first entity in the issue..


            if (issue.entityIds && issue.entityIds.length) {
              selectID = issue.entityIds[0]; // If a relation, focus on one of its members instead.
              // Otherwise we might be focusing on a part of map where the relation is not visible.

              if (selectID && selectID.charAt(0) === 'r') {
                // relation
                var ids = utilEntityAndDeepMemberIDs([selectID], graph);
                var nodeID = ids.find(function (id) {
                  return id.charAt(0) === 'n' && graph.hasEntity(id);
                });

                if (!nodeID) {
                  // relation has no downloaded nodes to focus on
                  var wayID = ids.find(function (id) {
                    return id.charAt(0) === 'w' && graph.hasEntity(id);
                  });

                  if (wayID) {
                    nodeID = graph.entity(wayID).first(); // focus on the first node of this way
                  }
                }

                if (nodeID) {
                  focusCenter = graph.entity(nodeID).loc;
                }
              }
            }

            if (focusCenter) {
              // Adjust the view
              var setZoom = Math.max(context.map().zoom(), 19);
              context.map().unobscuredCenterZoomEase(focusCenter, setZoom);
            }

            if (selectID) {
              // Enter select mode
              window.setTimeout(function () {
                context.enter(modeSelect(context, [selectID]));
                dispatch.call('focusedIssue', _this, issue);
              }, 250); // after ease
            }
          }; // `getIssuesBySeverity()`
          // Gets the issues then groups them by error/warning
          // (This just calls getIssues, then puts issues in groups)
          //
          // Arguments
          //   `options` - (see `getIssues`)
          // Returns
          //   Object result like:
          //   {
          //     error:    Array of errors,
          //     warning:  Array of warnings
          //   }
          //


          validator.getIssuesBySeverity = function (options) {
            var groups = utilArrayGroupBy(validator.getIssues(options), 'severity');
            groups.error = groups.error || [];
            groups.warning = groups.warning || [];
            return groups;
          }; // `getEntityIssues()`
          // Gets the issues that the given entity IDs have in common, matching the given options
          // (This just calls getIssues, then filters for the given entity IDs)
          // The issues are sorted for relevance
          //
          // Arguments
          //   `entityIDs` - Array or Set of entityIDs to get issues for
          //   `options` - (see `getIssues`)
          // Returns
          //   An Array containing the issues
          //


          validator.getSharedEntityIssues = function (entityIDs, options) {
            var orderedIssueTypes = [// Show some issue types in a particular order:
            'missing_tag', 'missing_role', // - missing data first
            'outdated_tags', 'mismatched_geometry', // - identity issues
            'crossing_ways', 'almost_junction', // - geometry issues where fixing them might solve connectivity issues
            'disconnected_way', 'impossible_oneway' // - finally connectivity issues
            ];
            var allIssues = validator.getIssues(options);
            var forEntityIDs = new Set(entityIDs);
            return allIssues.filter(function (issue) {
              return (issue.entityIds || []).some(function (entityID) {
                return forEntityIDs.has(entityID);
              });
            }).sort(function (issue1, issue2) {
              if (issue1.type === issue2.type) {
                // issues of the same type, sort deterministically
                return issue1.id < issue2.id ? -1 : 1;
              }

              var index1 = orderedIssueTypes.indexOf(issue1.type);
              var index2 = orderedIssueTypes.indexOf(issue2.type);

              if (index1 !== -1 && index2 !== -1) {
                // both issue types have explicit sort orders
                return index1 - index2;
              } else if (index1 === -1 && index2 === -1) {
                // neither issue type has an explicit sort order, sort by type
                return issue1.type < issue2.type ? -1 : 1;
              } else {
                // order explicit types before everything else
                return index1 !== -1 ? -1 : 1;
              }
            });
          }; // `getEntityIssues()`
          // Get an array of detected issues for the given entityID.
          // (This just calls getSharedEntityIssues for a single entity)
          //
          // Arguments
          //   `entityID` - the entity ID to get the issues for
          //   `options` - (see `getIssues`)
          // Returns
          //   An Array containing the issues
          //


          validator.getEntityIssues = function (entityID, options) {
            return validator.getSharedEntityIssues([entityID], options);
          }; // `getRuleKeys()`
          //
          // Returns
          //   An Array containing the rule keys
          //


          validator.getRuleKeys = function () {
            return Object.keys(_rules);
          }; // `isRuleEnabled()`
          //
          // Arguments
          //   `key` - the rule to check (e.g. 'crossing_ways')
          // Returns
          //   `true`/`false`
          //


          validator.isRuleEnabled = function (key) {
            return !_disabledRules[key];
          }; // `toggleRule()`
          // Toggles a single validation rule,
          // then reruns the validation so that the user sees something happen in the UI
          //
          // Arguments
          //   `key` - the rule to toggle (e.g. 'crossing_ways')
          //


          validator.toggleRule = function (key) {
            if (_disabledRules[key]) {
              delete _disabledRules[key];
            } else {
              _disabledRules[key] = true;
            }

            corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
            validator.validate();
          }; // `disableRules()`
          // Disables given validation rules,
          // then reruns the validation so that the user sees something happen in the UI
          //
          // Arguments
          //   `keys` - Array or Set containing rule keys to disable
          //


          validator.disableRules = function (keys) {
            _disabledRules = {};
            keys.forEach(function (k) {
              return _disabledRules[k] = true;
            });
            corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
            validator.validate();
          }; // `ignoreIssue()`
          // Don't show the given issue in lists
          //
          // Arguments
          //   `issueID` - the issueID
          //


          validator.ignoreIssue = function (issueID) {
            _ignoredIssueIDs.add(issueID);
          }; // `validate()`
          // Validates anything that has changed in the head graph since the last time it was run.
          // (head graph contains user's edits)
          //
          // Returns
          //   A Promise fulfilled when the validation has completed and then dispatches a `validated` event.
          //   This may take time but happen in the background during browser idle time.
          //


          validator.validate = function () {
            // Make sure the caches have graphs assigned to them.
            // (we don't do this in `reset` because context is still resetting things and `history.base()` is unstable then)
            var baseGraph = context.history().base();
            if (!_headCache.graph) _headCache.graph = baseGraph;
            if (!_baseCache.graph) _baseCache.graph = baseGraph;
            var prevGraph = _headCache.graph;
            var currGraph = context.graph();

            if (currGraph === prevGraph) {
              // _headCache.graph is current - we are caught up
              _headIsCurrent = true;
              dispatch.call('validated');
              return Promise.resolve();
            }

            if (_headPromise) {
              // Validation already in process, but we aren't caught up to current
              _headIsCurrent = false; // We will need to catch up after the validation promise fulfills

              return _headPromise;
            } // If we get here, its time to start validating stuff.


            _headCache.graph = currGraph; // take snapshot

            _completeDiff = context.history().difference().complete();
            var incrementalDiff = coreDifference(prevGraph, currGraph);
            var entityIDs = Object.keys(incrementalDiff.complete()); // if (!entityIDs.size) {

            if (!entityIDs.length) {
              dispatch.call('validated');
              return Promise.resolve();
            }

            _headPromise = validateEntitiesAsync(entityIDs, _headCache).then(function () {
              return updateResolvedIssues(entityIDs);
            }).then(function () {
              return dispatch.call('validated');
            })["catch"](function () {
              /* ignore */
            }).then(function () {
              _headPromise = null;

              if (!_headIsCurrent) {
                validator.validate(); // run it again to catch up to current graph
              }
            });
            return _headPromise;
          }; // register event handlers:
          // WHEN TO RUN VALIDATION:
          // When history changes:


          context.history().on('restore.validator', validator.validate) // on restore saved history
          .on('undone.validator', validator.validate) // on undo
          .on('redone.validator', validator.validate) // on redo
          .on('reset.validator', function () {
            // on history reset - happens after save, or enter/exit walkthrough
            reset(false); // cached issues aren't valid any longer if the history has been reset

            validator.validate();
          }); // but not on 'change' (e.g. while drawing)
          // When user changes editing modes (to catch recent changes e.g. drawing)

          context.on('exit.validator', validator.validate); // When merging fetched data, validate base graph:

          context.history().on('merge.validator', function (entities) {
            if (!entities) return; // Make sure the caches have graphs assigned to them.
            // (we don't do this in `reset` because context is still resetting things and `history.base()` is unstable then)

            var baseGraph = context.history().base();
            if (!_headCache.graph) _headCache.graph = baseGraph;
            if (!_baseCache.graph) _baseCache.graph = baseGraph;
            var entityIDs = entities.map(function (entity) {
              return entity.id;
            }); // entityIDs = entityIDsToValidate(entityIDs, baseGraph);  // expand set

            validateEntitiesAsync(entityIDs, _baseCache);
          }); // `validateEntity()`   (private)
          // Runs all validation rules on a single entity.
          // Some things to note:
          //  - Graph is passed in from whenever the validation was started.  Validators shouldn't use
          //   `context.graph()` because this all happens async, and the graph might have changed
          //   (for example, nodes getting deleted before the validation can run)
          //  - Validator functions may still be waiting on something and return a "provisional" result.
          //    In this situation, we will schedule to revalidate the entity sometime later.
          //
          // Arguments
          //   `entity` - The entity
          //   `graph` - graph containing the entity
          //
          // Returns
          //   Object result like:
          //   {
          //     issues:       Array of detected issues
          //     provisional:  `true` if provisional result, `false` if final result
          //   }
          //

          function validateEntity(entity, graph) {
            var result = {
              issues: [],
              provisional: false
            };
            Object.keys(_rules).forEach(runValidation); // run all rules

            return result; // runs validation and appends resulting issues

            function runValidation(key) {
              var fn = _rules[key];

              if (typeof fn !== 'function') {
                console.error('no such validation rule = ' + key); // eslint-disable-line no-console

                return;
              }

              var detected = fn(entity, graph);

              if (detected.provisional) {
                // this validation should be run again later
                result.provisional = true;
              }

              detected = detected.filter(applySeverityOverrides);
              result.issues = result.issues.concat(detected); // If there are any override rules that match the issue type/subtype,
              // adjust severity (or disable it) and keep/discard as quickly as possible.

              function applySeverityOverrides(issue) {
                var type = issue.type;
                var subtype = issue.subtype || '';
                var i;

                for (i = 0; i < _errorOverrides.length; i++) {
                  if (_errorOverrides[i].type.test(type) && _errorOverrides[i].subtype.test(subtype)) {
                    issue.severity = 'error';
                    return true;
                  }
                }

                for (i = 0; i < _warningOverrides.length; i++) {
                  if (_warningOverrides[i].type.test(type) && _warningOverrides[i].subtype.test(subtype)) {
                    issue.severity = 'warning';
                    return true;
                  }
                }

                for (i = 0; i < _disableOverrides.length; i++) {
                  if (_disableOverrides[i].type.test(type) && _disableOverrides[i].subtype.test(subtype)) {
                    return false;
                  }
                }

                return true;
              }
            }
          } // `updateResolvedIssues()`   (private)
          // Determine if any issues were resolved for the given entities.
          // This is called by `validate()` after validation of the head graph
          //
          // Give the user credit for fixing an issue if:
          // - the issue is in the base cache
          // - the issue is not in the head cache
          // - the user did something to one of the entities involved in the issue
          //
          // Arguments
          //   `entityIDs` - Array containing entity IDs.
          //


          function updateResolvedIssues(entityIDs) {
            entityIDs.forEach(function (entityID) {
              var baseIssues = _baseCache.issuesByEntityID[entityID];
              if (!baseIssues) return;
              baseIssues.forEach(function (issueID) {
                // Check if the user did something to one of the entities involved in this issue.
                // (This issue could involve multiple entities, e.g. disconnected routable features)
                var issue = _baseCache.issuesByIssueID[issueID];
                var userModified = (issue.entityIds || []).some(function (id) {
                  return _completeDiff.hasOwnProperty(id);
                });

                if (userModified && !_headCache.issuesByIssueID[issueID]) {
                  // issue seems fixed
                  _resolvedIssueIDs.add(issueID);
                } else {
                  // issue still not resolved
                  _resolvedIssueIDs["delete"](issueID); // (did undo, or possibly fixed and then re-caused the issue)

                }
              });
            });
          } // `validateEntitiesAsync()`   (private)
          // Schedule validation for many entities.
          //
          // Arguments
          //   `entityIDs` - Array containing entity IDs.
          //   `graph` - the graph to validate that contains those entities
          //   `cache` - the cache to store results in (_headCache or _baseCache)
          //
          // Returns
          //   A Promise fulfilled when the validation has completed.
          //   This may take time but happen in the background during browser idle time.
          //


          function validateEntitiesAsync(entityIDs, cache) {
            // Enqueue the work
            var jobs = entityIDs.map(function (entityID) {
              if (cache.queuedEntityIDs.has(entityID)) return null; // queued already

              cache.queuedEntityIDs.add(entityID);
              return function () {
                // Clear caches for existing issues related to this entity
                cache.uncacheEntityID(entityID);
                cache.queuedEntityIDs["delete"](entityID);
                var graph = cache.graph;
                if (!graph) return; // was reset?

                var entity = graph.hasEntity(entityID); // Sanity check: don't validate deleted entities

                if (!entity) return; // In the head cache, only validate features that the user is responsible for - #8632
                // For example, a user can undo some work and an issue will still present in the
                // head graph, but we don't want to credit the user for causing that issue.

                if (cache.which === 'head' && !_completeDiff.hasOwnProperty(entityID)) return; // detect new issues and update caches

                var result = validateEntity(entity, graph);

                if (result.provisional) {
                  // provisional result
                  cache.provisionalEntityIDs.add(entityID); // we'll need to revalidate this entity again later
                }

                cache.cacheIssues(result.issues); // update cache
              };
            }).filter(Boolean); // Perform the work in chunks.
            // Because this will happen during idle callbacks, we want to choose a chunk size
            // that won't make the browser stutter too badly.

            cache.queue = cache.queue.concat(utilArrayChunk(jobs, 100)); // Perform the work

            if (cache.queuePromise) return cache.queuePromise;
            cache.queuePromise = processQueue(cache).then(function () {
              return revalidateProvisionalEntities(cache);
            })["catch"](function () {
              /* ignore */
            })["finally"](function () {
              return cache.queuePromise = null;
            });
            return cache.queuePromise;
          } // `revalidateProvisionalEntities()`   (private)
          // Sometimes a validator will return a "provisional" result.
          // In this situation, we'll need to revalidate the entity later.
          // This function waits a delay, then places them back into the validation queue.
          //
          // Arguments
          //   `cache` - The cache (_headCache or _baseCache)
          //


          function revalidateProvisionalEntities(cache) {
            if (!cache.provisionalEntityIDs.size) return; // nothing to do

            var handle = window.setTimeout(function () {
              _deferredST["delete"](handle);

              if (!cache.provisionalEntityIDs.size) return; // nothing to do

              validateEntitiesAsync(Array.from(cache.provisionalEntityIDs), cache);
            }, RETRY);

            _deferredST.add(handle);
          } // `processQueue(queue)`   (private)
          // Process the next chunk of deferred validation work
          //
          // Arguments
          //   `cache` - The cache (_headCache or _baseCache)
          //
          // Returns
          //   A Promise fulfilled when the validation has completed.
          //   This may take time but happen in the background during browser idle time.
          //


          function processQueue(cache) {
            // console.log(`${cache.which} queue length ${cache.queue.length}`);
            if (!cache.queue.length) return Promise.resolve(); // we're done

            var chunk = cache.queue.pop();
            return new Promise(function (resolvePromise) {
              var handle = window.requestIdleCallback(function () {
                _deferredRIC["delete"](handle); // const t0 = performance.now();


                chunk.forEach(function (job) {
                  return job();
                }); // const t1 = performance.now();
                // console.log('chunk processed in ' + (t1 - t0) + ' ms');

                resolvePromise();
              });

              _deferredRIC.add(handle);
            }).then(function () {
              // dispatch an event sometimes to redraw various UI things
              if (cache.queue.length % 25 === 0) dispatch.call('validated');
            }).then(function () {
              return processQueue(cache);
            });
          }

          return validator;
        } // `validationCache()`   (private)
        // Creates a cache to store validation state
        // We create 2 of these:
        //   `_baseCache` for validation on the base graph (unedited)
        //   `_headCache` for validation on the head graph (user edits applied)
        //
        // Arguments
        //   `which` - just a String 'base' or 'head' to keep track of it
        //

        function validationCache(which) {
          var cache = {
            which: which,
            graph: null,
            queue: [],
            queuePromise: null,
            queuedEntityIDs: new Set(),
            provisionalEntityIDs: new Set(),
            issuesByIssueID: {},
            // issue.id -> issue
            issuesByEntityID: {} // entity.id -> Set(issue.id)

          };

          cache.cacheIssues = function (issues) {
            issues.forEach(function (issue) {
              var entityIDs = issue.entityIds || [];
              entityIDs.forEach(function (entityID) {
                if (!cache.issuesByEntityID[entityID]) {
                  cache.issuesByEntityID[entityID] = new Set();
                }

                cache.issuesByEntityID[entityID].add(issue.id);
              });
              cache.issuesByIssueID[issue.id] = issue;
            });
          };

          cache.uncacheIssue = function (issue) {
            // When multiple entities are involved (e.g. crossing_ways),
            // remove this issue from the other entity caches too..
            var entityIDs = issue.entityIds || [];
            entityIDs.forEach(function (entityID) {
              if (cache.issuesByEntityID[entityID]) {
                cache.issuesByEntityID[entityID]["delete"](issue.id);
              }
            });
            delete cache.issuesByIssueID[issue.id];
          };

          cache.uncacheIssues = function (issues) {
            issues.forEach(cache.uncacheIssue);
          };

          cache.uncacheIssuesOfType = function (type) {
            var issuesOfType = Object.values(cache.issuesByIssueID).filter(function (issue) {
              return issue.type === type;
            });
            cache.uncacheIssues(issuesOfType);
          }; // Remove a single entity and all its related issues from the caches


          cache.uncacheEntityID = function (entityID) {
            var issueIDs = cache.issuesByEntityID[entityID];

            if (issueIDs) {
              issueIDs.forEach(function (issueID) {
                var issue = cache.issuesByIssueID[issueID];

                if (issue) {
                  cache.uncacheIssue(issue);
                } else {
                  delete cache.issuesByIssueID[issueID];
                }
              });
            }

            delete cache.issuesByEntityID[entityID];
            cache.provisionalEntityIDs["delete"](entityID);
          };

          return cache;
        }

        function coreUploader(context) {
          var dispatch = dispatch$8( // Start and end events are dispatched exactly once each per legitimate outside call to `save`
          'saveStarted', // dispatched as soon as a call to `save` has been deemed legitimate
          'saveEnded', // dispatched after the result event has been dispatched
          'willAttemptUpload', // dispatched before the actual upload call occurs, if it will
          'progressChanged', // Each save results in one of these outcomes:
          'resultNoChanges', // upload wasn't attempted since there were no edits
          'resultErrors', // upload failed due to errors
          'resultConflicts', // upload failed due to data conflicts
          'resultSuccess' // upload completed without errors
          );
          var _isSaving = false;
          var _conflicts = [];
          var _errors = [];

          var _origChanges;

          var _discardTags = {};
          _mainFileFetcher.get('discarded').then(function (d) {
            _discardTags = d;
          })["catch"](function () {
            /* ignore */
          });
          var uploader = utilRebind({}, dispatch, 'on');

          uploader.isSaving = function () {
            return _isSaving;
          };

          uploader.save = function (changeset, tryAgain, checkConflicts) {
            // Guard against accidentally entering save code twice - #4641
            if (_isSaving && !tryAgain) {
              return;
            }

            var osm = context.connection();
            if (!osm) return; // If user somehow got logged out mid-save, try to reauthenticate..
            // This can happen if they were logged in from before, but the tokens are no longer valid.

            if (!osm.authenticated()) {
              osm.authenticate(function (err) {
                if (!err) {
                  uploader.save(changeset, tryAgain, checkConflicts); // continue where we left off..
                }
              });
              return;
            }

            if (!_isSaving) {
              _isSaving = true;
              dispatch.call('saveStarted', this);
            }

            var history = context.history();
            _conflicts = [];
            _errors = []; // Store original changes, in case user wants to download them as an .osc file

            _origChanges = history.changes(actionDiscardTags(history.difference(), _discardTags)); // First time, `history.perform` a no-op action.
            // Any conflict resolutions will be done as `history.replace`
            // Remember to pop this later if needed

            if (!tryAgain) {
              history.perform(actionNoop());
            } // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`


            if (!checkConflicts) {
              upload(changeset); // Do the full (slow) conflict check..
            } else {
              performFullConflictCheck(changeset);
            }
          };

          function performFullConflictCheck(changeset) {
            var osm = context.connection();
            if (!osm) return;
            var history = context.history();
            var localGraph = context.graph();
            var remoteGraph = coreGraph(history.base(), true);
            var summary = history.difference().summary();
            var _toCheck = [];

            for (var i = 0; i < summary.length; i++) {
              var item = summary[i];

              if (item.changeType === 'modified') {
                _toCheck.push(item.entity.id);
              }
            }

            var _toLoad = withChildNodes(_toCheck, localGraph);

            var _loaded = {};
            var _toLoadCount = 0;
            var _toLoadTotal = _toLoad.length;

            if (_toCheck.length) {
              dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);

              _toLoad.forEach(function (id) {
                _loaded[id] = false;
              });

              osm.loadMultiple(_toLoad, loaded);
            } else {
              upload(changeset);
            }

            return;

            function withChildNodes(ids, graph) {
              var s = new Set(ids);
              ids.forEach(function (id) {
                var entity = graph.entity(id);
                if (entity.type !== 'way') return;
                graph.childNodes(entity).forEach(function (child) {
                  if (child.version !== undefined) {
                    s.add(child.id);
                  }
                });
              });
              return Array.from(s);
            } // Reload modified entities into an alternate graph and check for conflicts..


            function loaded(err, result) {
              if (_errors.length) return;

              if (err) {
                _errors.push({
                  msg: err.message || err.responseText,
                  details: [_t('save.status_code', {
                    code: err.status
                  })]
                });

                didResultInErrors();
              } else {
                var loadMore = [];
                result.data.forEach(function (entity) {
                  remoteGraph.replace(entity);
                  _loaded[entity.id] = true;
                  _toLoad = _toLoad.filter(function (val) {
                    return val !== entity.id;
                  });
                  if (!entity.visible) return; // Because loadMultiple doesn't download /full like loadEntity,
                  // need to also load children that aren't already being checked..

                  var i, id;

                  if (entity.type === 'way') {
                    for (i = 0; i < entity.nodes.length; i++) {
                      id = entity.nodes[i];

                      if (_loaded[id] === undefined) {
                        _loaded[id] = false;
                        loadMore.push(id);
                      }
                    }
                  } else if (entity.type === 'relation' && entity.isMultipolygon()) {
                    for (i = 0; i < entity.members.length; i++) {
                      id = entity.members[i].id;

                      if (_loaded[id] === undefined) {
                        _loaded[id] = false;
                        loadMore.push(id);
                      }
                    }
                  }
                });
                _toLoadCount += result.data.length;
                _toLoadTotal += loadMore.length;
                dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);

                if (loadMore.length) {
                  _toLoad.push.apply(_toLoad, loadMore);

                  osm.loadMultiple(loadMore, loaded);
                }

                if (!_toLoad.length) {
                  detectConflicts();
                  upload(changeset);
                }
              }
            }

            function detectConflicts() {
              function choice(id, text, _action) {
                return {
                  id: id,
                  text: text,
                  action: function action() {
                    history.replace(_action);
                  }
                };
              }

              function formatUser(d) {
                return '<a href="' + osm.userURL(d) + '" target="_blank">' + d + '</a>';
              }

              function entityName(entity) {
                return utilDisplayName(entity) || utilDisplayType(entity.id) + ' ' + entity.id;
              }

              function sameVersions(local, remote) {
                if (local.version !== remote.version) return false;

                if (local.type === 'way') {
                  var children = utilArrayUnion(local.nodes, remote.nodes);

                  for (var i = 0; i < children.length; i++) {
                    var a = localGraph.hasEntity(children[i]);
                    var b = remoteGraph.hasEntity(children[i]);
                    if (a && b && a.version !== b.version) return false;
                  }
                }

                return true;
              }

              _toCheck.forEach(function (id) {
                var local = localGraph.entity(id);
                var remote = remoteGraph.entity(id);
                if (sameVersions(local, remote)) return;
                var merge = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags, formatUser);
                history.replace(merge);
                var mergeConflicts = merge.conflicts();
                if (!mergeConflicts.length) return; // merged safely

                var forceLocal = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_local');
                var forceRemote = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_remote');
                var keepMine = _t('save.conflict.' + (remote.visible ? 'keep_local' : 'restore'));
                var keepTheirs = _t('save.conflict.' + (remote.visible ? 'keep_remote' : 'delete'));

                _conflicts.push({
                  id: id,
                  name: entityName(local),
                  details: mergeConflicts,
                  chosen: 1,
                  choices: [choice(id, keepMine, forceLocal), choice(id, keepTheirs, forceRemote)]
                });
              });
            }
          }

          function upload(changeset) {
            var osm = context.connection();

            if (!osm) {
              _errors.push({
                msg: 'No OSM Service'
              });
            }

            if (_conflicts.length) {
              didResultInConflicts(changeset);
            } else if (_errors.length) {
              didResultInErrors();
            } else {
              var history = context.history();
              var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));

              if (changes.modified.length || changes.created.length || changes.deleted.length) {
                dispatch.call('willAttemptUpload', this);
                osm.putChangeset(changeset, changes, uploadCallback);
              } else {
                // changes were insignificant or reverted by user
                didResultInNoChanges();
              }
            }
          }

          function uploadCallback(err, changeset) {
            if (err) {
              if (err.status === 409) {
                // 409 Conflict
                uploader.save(changeset, true, true); // tryAgain = true, checkConflicts = true
              } else {
                _errors.push({
                  msg: err.message || err.responseText,
                  details: [_t('save.status_code', {
                    code: err.status
                  })]
                });

                didResultInErrors();
              }
            } else {
              didResultInSuccess(changeset);
            }
          }

          function didResultInNoChanges() {
            dispatch.call('resultNoChanges', this);
            endSave();
            context.flush(); // reset iD
          }

          function didResultInErrors() {
            context.history().pop();
            dispatch.call('resultErrors', this, _errors);
            endSave();
          }

          function didResultInConflicts(changeset) {
            _conflicts.sort(function (a, b) {
              return b.id.localeCompare(a.id);
            });

            dispatch.call('resultConflicts', this, changeset, _conflicts, _origChanges);
            endSave();
          }

          function didResultInSuccess(changeset) {
            // delete the edit stack cached to local storage
            context.history().clearSaved();
            dispatch.call('resultSuccess', this, changeset); // Add delay to allow for postgres replication #1646 #2678

            window.setTimeout(function () {
              endSave();
              context.flush(); // reset iD
            }, 2500);
          }

          function endSave() {
            _isSaving = false;
            dispatch.call('saveEnded', this);
          }

          uploader.cancelConflictResolution = function () {
            context.history().pop();
          };

          uploader.processResolvedConflicts = function (changeset) {
            var history = context.history();

            for (var i = 0; i < _conflicts.length; i++) {
              if (_conflicts[i].chosen === 1) {
                // user chose "use theirs"
                var entity = context.hasEntity(_conflicts[i].id);

                if (entity && entity.type === 'way') {
                  var children = utilArrayUniq(entity.nodes);

                  for (var j = 0; j < children.length; j++) {
                    history.replace(actionRevert(children[j]));
                  }
                }

                history.replace(actionRevert(_conflicts[i].id));
              }
            }

            uploader.save(changeset, true, false); // tryAgain = true, checkConflicts = false
          };

          uploader.reset = function () {};

          return uploader;
        }

        var abs = Math.abs;
        var exp = Math.exp;
        var E = Math.E;

        var FORCED = fails(function () {
          // eslint-disable-next-line es/no-math-sinh -- required for testing
          return Math.sinh(-2e-17) != -2e-17;
        });

        // `Math.sinh` method
        // https://tc39.es/ecma262/#sec-math.sinh
        // V8 near Chromium 38 has a problem with very small numbers
        _export({ target: 'Math', stat: true, forced: FORCED }, {
          sinh: function sinh(x) {
            return abs(x = +x) < 1 ? (mathExpm1(x) - mathExpm1(-x)) / 2 : (exp(x - 1) - exp(-x - 1)) * (E / 2);
          }
        });

        var isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2; // listen for DPI change, e.g. when dragging a browser window from a retina to non-retina screen

        window.matchMedia("\n        (-webkit-min-device-pixel-ratio: 2), /* Safari */\n        (min-resolution: 2dppx),             /* standard */\n        (min-resolution: 192dpi)             /* fallback */\n    ").addListener(function () {
          isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
        });

        function localeDateString(s) {
          if (!s) return null;
          var options = {
            day: 'numeric',
            month: 'short',
            year: 'numeric'
          };
          var d = new Date(s);
          if (isNaN(d.getTime())) return null;
          return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
        }

        function vintageRange(vintage) {
          var s;

          if (vintage.start || vintage.end) {
            s = vintage.start || '?';

            if (vintage.start !== vintage.end) {
              s += ' - ' + (vintage.end || '?');
            }
          }

          return s;
        }

        function rendererBackgroundSource(data) {
          var source = Object.assign({}, data); // shallow copy

          var _offset = [0, 0];
          var _name = source.name;
          var _description = source.description;

          var _best = !!source.best;

          var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;

          source.tileSize = data.tileSize || 256;
          source.zoomExtent = data.zoomExtent || [0, 22];
          source.overzoom = data.overzoom !== false;

          source.offset = function (val) {
            if (!arguments.length) return _offset;
            _offset = val;
            return source;
          };

          source.nudge = function (val, zoomlevel) {
            _offset[0] += val[0] / Math.pow(2, zoomlevel);
            _offset[1] += val[1] / Math.pow(2, zoomlevel);
            return source;
          };

          source.name = function () {
            var id_safe = source.id.replace(/\./g, '<TX_DOT>');
            return _t('imagery.' + id_safe + '.name', {
              "default": _name
            });
          };

          source.label = function () {
            var id_safe = source.id.replace(/\./g, '<TX_DOT>');
            return _t.html('imagery.' + id_safe + '.name', {
              "default": _name
            });
          };

          source.description = function () {
            var id_safe = source.id.replace(/\./g, '<TX_DOT>');
            return _t.html('imagery.' + id_safe + '.description', {
              "default": _description
            });
          };

          source.best = function () {
            return _best;
          };

          source.area = function () {
            if (!data.polygon) return Number.MAX_VALUE; // worldwide

            var area = d3_geoArea({
              type: 'MultiPolygon',
              coordinates: [data.polygon]
            });
            return isNaN(area) ? 0 : area;
          };

          source.imageryUsed = function () {
            return _name || source.id;
          };

          source.template = function (val) {
            if (!arguments.length) return _template;

            if (source.id === 'custom' || source.id === 'Bing') {
              _template = val;
            }

            return source;
          };

          source.url = function (coord) {
            var result = _template;
            if (result === '') return result; // source 'none'
            // Guess a type based on the tokens present in the template
            // (This is for 'custom' source, where we don't know)

            if (!source.type) {
              if (/SERVICE=WMS|\{(proj|wkid|bbox)\}/.test(_template)) {
                source.type = 'wms';
                source.projection = 'EPSG:3857'; // guess
              } else if (/\{(x|y)\}/.test(_template)) {
                source.type = 'tms';
              } else if (/\{u\}/.test(_template)) {
                source.type = 'bing';
              }
            }

            if (source.type === 'wms') {
              var tileToProjectedCoords = function tileToProjectedCoords(x, y, z) {
                //polyfill for IE11, PhantomJS
                var sinh = Math.sinh || function (x) {
                  var y = Math.exp(x);
                  return (y - 1 / y) / 2;
                };

                var zoomSize = Math.pow(2, z);
                var lon = x / zoomSize * Math.PI * 2 - Math.PI;
                var lat = Math.atan(sinh(Math.PI * (1 - 2 * y / zoomSize)));

                switch (source.projection) {
                  case 'EPSG:4326':
                    return {
                      x: lon * 180 / Math.PI,
                      y: lat * 180 / Math.PI
                    };

                  default:
                    // EPSG:3857 and synonyms
                    var mercCoords = mercatorRaw(lon, lat);
                    return {
                      x: 20037508.34 / Math.PI * mercCoords[0],
                      y: 20037508.34 / Math.PI * mercCoords[1]
                    };
                }
              };

              var tileSize = source.tileSize;
              var projection = source.projection;
              var minXmaxY = tileToProjectedCoords(coord[0], coord[1], coord[2]);
              var maxXminY = tileToProjectedCoords(coord[0] + 1, coord[1] + 1, coord[2]);
              result = result.replace(/\{(\w+)\}/g, function (token, key) {
                switch (key) {
                  case 'width':
                  case 'height':
                    return tileSize;

                  case 'proj':
                    return projection;

                  case 'wkid':
                    return projection.replace(/^EPSG:/, '');

                  case 'bbox':
                    // WMS 1.3 flips x/y for some coordinate systems including EPSG:4326 - #7557
                    if (projection === 'EPSG:4326' && // The CRS parameter implies version 1.3 (prior versions use SRS)
                    /VERSION=1.3|CRS={proj}/.test(source.template().toUpperCase())) {
                      return maxXminY.y + ',' + minXmaxY.x + ',' + minXmaxY.y + ',' + maxXminY.x;
                    } else {
                      return minXmaxY.x + ',' + maxXminY.y + ',' + maxXminY.x + ',' + minXmaxY.y;
                    }

                  case 'w':
                    return minXmaxY.x;

                  case 's':
                    return maxXminY.y;

                  case 'n':
                    return maxXminY.x;

                  case 'e':
                    return minXmaxY.y;

                  default:
                    return token;
                }
              });
            } else if (source.type === 'tms') {
              result = result.replace('{x}', coord[0]).replace('{y}', coord[1]) // TMS-flipped y coordinate
              .replace(/\{[t-]y\}/, Math.pow(2, coord[2]) - coord[1] - 1).replace(/\{z(oom)?\}/, coord[2]) // only fetch retina tiles for retina screens
              .replace(/\{@2x\}|\{r\}/, isRetina ? '@2x' : '');
            } else if (source.type === 'bing') {
              result = result.replace('{u}', function () {
                var u = '';

                for (var zoom = coord[2]; zoom > 0; zoom--) {
                  var b = 0;
                  var mask = 1 << zoom - 1;
                  if ((coord[0] & mask) !== 0) b++;
                  if ((coord[1] & mask) !== 0) b += 2;
                  u += b.toString();
                }

                return u;
              });
            } // these apply to any type..


            result = result.replace(/\{switch:([^}]+)\}/, function (s, r) {
              var subdomains = r.split(',');
              return subdomains[(coord[0] + coord[1]) % subdomains.length];
            });
            return result;
          };

          source.validZoom = function (z) {
            return source.zoomExtent[0] <= z && (source.overzoom || source.zoomExtent[1] > z);
          };

          source.isLocatorOverlay = function () {
            return source.id === 'mapbox_locator_overlay';
          };
          /* hides a source from the list, but leaves it available for use */


          source.isHidden = function () {
            return source.id === 'DigitalGlobe-Premium-vintage' || source.id === 'DigitalGlobe-Standard-vintage';
          };

          source.copyrightNotices = function () {};

          source.getMetadata = function (center, tileCoord, callback) {
            var vintage = {
              start: localeDateString(source.startDate),
              end: localeDateString(source.endDate)
            };
            vintage.range = vintageRange(vintage);
            var metadata = {
              vintage: vintage
            };
            callback(null, metadata);
          };

          return source;
        }

        rendererBackgroundSource.Bing = function (data, dispatch) {
          // https://docs.microsoft.com/en-us/bingmaps/rest-services/imagery/get-imagery-metadata
          // https://docs.microsoft.com/en-us/bingmaps/rest-services/directly-accessing-the-bing-maps-tiles
          //fallback url template
          data.template = 'https://ecn.t{switch:0,1,2,3}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&n=z';
          var bing = rendererBackgroundSource(data); //var key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU'; // P2, JOSM, etc

          var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q'; // iD

          /*
          missing tile image strictness param (n=)
          •   n=f -> (Fail) returns a 404
          •   n=z -> (Empty) returns a 200 with 0 bytes (no content)
          •   n=t -> (Transparent) returns a 200 with a transparent (png) tile
          */

          var strictParam = 'n';
          var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?include=ImageryProviders&uriScheme=https&key=' + key;
          var cache = {};
          var inflight = {};
          var providers = [];
          d3_json(url).then(function (json) {
            var imageryResource = json.resourceSets[0].resources[0]; //retrieve and prepare up to date imagery template

            var template = imageryResource.imageUrl; //https://ecn.{subdomain}.tiles.virtualearth.net/tiles/a{quadkey}.jpeg?g=10339

            var subDomains = imageryResource.imageUrlSubdomains; //["t0, t1, t2, t3"]

            var subDomainNumbers = subDomains.map(function (subDomain) {
              return subDomain.substring(1);
            }).join(',');
            template = template.replace('{subdomain}', "t{switch:".concat(subDomainNumbers, "}")).replace('{quadkey}', '{u}');

            if (!new URLSearchParams(template).has(strictParam)) {
              template += "&".concat(strictParam, "=z");
            }

            bing.template(template);
            providers = imageryResource.imageryProviders.map(function (provider) {
              return {
                attribution: provider.attribution,
                areas: provider.coverageAreas.map(function (area) {
                  return {
                    zoom: [area.zoomMin, area.zoomMax],
                    extent: geoExtent([area.bbox[1], area.bbox[0]], [area.bbox[3], area.bbox[2]])
                  };
                })
              };
            });
            dispatch.call('change');
          })["catch"](function () {
            /* ignore */
          });

          bing.copyrightNotices = function (zoom, extent) {
            zoom = Math.min(zoom, 21);
            return providers.filter(function (provider) {
              return provider.areas.some(function (area) {
                return extent.intersects(area.extent) && area.zoom[0] <= zoom && area.zoom[1] >= zoom;
              });
            }).map(function (provider) {
              return provider.attribution;
            }).join(', ');
          };

          bing.getMetadata = function (center, tileCoord, callback) {
            var tileID = tileCoord.slice(0, 3).join('/');
            var zoom = Math.min(tileCoord[2], 21);
            var centerPoint = center[1] + ',' + center[0]; // lat,lng

            var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint + '?zl=' + zoom + '&key=' + key;
            if (inflight[tileID]) return;

            if (!cache[tileID]) {
              cache[tileID] = {};
            }

            if (cache[tileID] && cache[tileID].metadata) {
              return callback(null, cache[tileID].metadata);
            }

            inflight[tileID] = true;
            d3_json(url).then(function (result) {
              delete inflight[tileID];

              if (!result) {
                throw new Error('Unknown Error');
              }

              var vintage = {
                start: localeDateString(result.resourceSets[0].resources[0].vintageStart),
                end: localeDateString(result.resourceSets[0].resources[0].vintageEnd)
              };
              vintage.range = vintageRange(vintage);
              var metadata = {
                vintage: vintage
              };
              cache[tileID].metadata = metadata;
              if (callback) callback(null, metadata);
            })["catch"](function (err) {
              delete inflight[tileID];
              if (callback) callback(err.message);
            });
          };

          bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
          return bing;
        };

        rendererBackgroundSource.Esri = function (data) {
          // in addition to using the tilemap at zoom level 20, overzoom real tiles - #4327 (deprecated technique, but it works)
          if (data.template.match(/blankTile/) === null) {
            data.template = data.template + '?blankTile=false';
          }

          var esri = rendererBackgroundSource(data);
          var cache = {};
          var inflight = {};

          var _prevCenter; // use a tilemap service to set maximum zoom for esri tiles dynamically
          // https://developers.arcgis.com/documentation/tiled-elevation-service/


          esri.fetchTilemap = function (center) {
            // skip if we have already fetched a tilemap within 5km
            if (_prevCenter && geoSphericalDistance(center, _prevCenter) < 5000) return;
            _prevCenter = center; // tiles are available globally to zoom level 19, afterward they may or may not be present

            var z = 20; // first generate a random url using the template

            var dummyUrl = esri.url([1, 2, 3]); // calculate url z/y/x from the lat/long of the center of the map

            var x = Math.floor((center[0] + 180) / 360 * Math.pow(2, z));
            var y = Math.floor((1 - Math.log(Math.tan(center[1] * Math.PI / 180) + 1 / Math.cos(center[1] * Math.PI / 180)) / Math.PI) / 2 * Math.pow(2, z)); // fetch an 8x8 grid to leverage cache

            var tilemapUrl = dummyUrl.replace(/tile\/[0-9]+\/[0-9]+\/[0-9]+\?blankTile=false/, 'tilemap') + '/' + z + '/' + y + '/' + x + '/8/8'; // make the request and introspect the response from the tilemap server

            d3_json(tilemapUrl).then(function (tilemap) {
              if (!tilemap) {
                throw new Error('Unknown Error');
              }

              var hasTiles = true;

              for (var i = 0; i < tilemap.data.length; i++) {
                // 0 means an individual tile in the grid doesn't exist
                if (!tilemap.data[i]) {
                  hasTiles = false;
                  break;
                }
              } // if any tiles are missing at level 20 we restrict maxZoom to 19


              esri.zoomExtent[1] = hasTiles ? 22 : 19;
            })["catch"](function () {
              /* ignore */
            });
          };

          esri.getMetadata = function (center, tileCoord, callback) {
            var tileID = tileCoord.slice(0, 3).join('/');
            var zoom = Math.min(tileCoord[2], esri.zoomExtent[1]);
            var centerPoint = center[0] + ',' + center[1]; // long, lat (as it should be)

            var unknown = _t('info_panels.background.unknown');
            var metadataLayer;
            var vintage = {};
            var metadata = {};
            if (inflight[tileID]) return;

            switch (true) {
              case zoom >= 20 && esri.id === 'EsriWorldImageryClarity':
                metadataLayer = 4;
                break;

              case zoom >= 19:
                metadataLayer = 3;
                break;

              case zoom >= 17:
                metadataLayer = 2;
                break;

              case zoom >= 13:
                metadataLayer = 0;
                break;

              default:
                metadataLayer = 99;
            }

            var url; // build up query using the layer appropriate to the current zoom

            if (esri.id === 'EsriWorldImagery') {
              url = 'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/';
            } else if (esri.id === 'EsriWorldImageryClarity') {
              url = 'https://serviceslab.arcgisonline.com/arcgis/rest/services/Clarity_World_Imagery/MapServer/';
            }

            url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';

            if (!cache[tileID]) {
              cache[tileID] = {};
            }

            if (cache[tileID] && cache[tileID].metadata) {
              return callback(null, cache[tileID].metadata);
            } // accurate metadata is only available >= 13


            if (metadataLayer === 99) {
              vintage = {
                start: null,
                end: null,
                range: null
              };
              metadata = {
                vintage: null,
                source: unknown,
                description: unknown,
                resolution: unknown,
                accuracy: unknown
              };
              callback(null, metadata);
            } else {
              inflight[tileID] = true;
              d3_json(url).then(function (result) {
                delete inflight[tileID];

                if (!result) {
                  throw new Error('Unknown Error');
                } else if (result.features && result.features.length < 1) {
                  throw new Error('No Results');
                } else if (result.error && result.error.message) {
                  throw new Error(result.error.message);
                } // pass through the discrete capture date from metadata


                var captureDate = localeDateString(result.features[0].attributes.SRC_DATE2);
                vintage = {
                  start: captureDate,
                  end: captureDate,
                  range: captureDate
                };
                metadata = {
                  vintage: vintage,
                  source: clean(result.features[0].attributes.NICE_NAME),
                  description: clean(result.features[0].attributes.NICE_DESC),
                  resolution: clean(+parseFloat(result.features[0].attributes.SRC_RES).toFixed(4)),
                  accuracy: clean(+parseFloat(result.features[0].attributes.SRC_ACC).toFixed(4))
                }; // append units - meters

                if (isFinite(metadata.resolution)) {
                  metadata.resolution += ' m';
                }

                if (isFinite(metadata.accuracy)) {
                  metadata.accuracy += ' m';
                }

                cache[tileID].metadata = metadata;
                if (callback) callback(null, metadata);
              })["catch"](function (err) {
                delete inflight[tileID];
                if (callback) callback(err.message);
              });
            }

            function clean(val) {
              return String(val).trim() || unknown;
            }
          };

          return esri;
        };

        rendererBackgroundSource.None = function () {
          var source = rendererBackgroundSource({
            id: 'none',
            template: ''
          });

          source.name = function () {
            return _t('background.none');
          };

          source.label = function () {
            return _t.html('background.none');
          };

          source.imageryUsed = function () {
            return null;
          };

          source.area = function () {
            return -1; // sources in background pane are sorted by area
          };

          return source;
        };

        rendererBackgroundSource.Custom = function (template) {
          var source = rendererBackgroundSource({
            id: 'custom',
            template: template
          });

          source.name = function () {
            return _t('background.custom');
          };

          source.label = function () {
            return _t.html('background.custom');
          };

          source.imageryUsed = function () {
            // sanitize personal connection tokens - #6801
            var cleaned = source.template(); // from query string parameters

            if (cleaned.indexOf('?') !== -1) {
              var parts = cleaned.split('?', 2);
              var qs = utilStringQs(parts[1]);
              ['access_token', 'connectId', 'token'].forEach(function (param) {
                if (qs[param]) {
                  qs[param] = '{apikey}';
                }
              });
              cleaned = parts[0] + '?' + utilQsString(qs, true); // true = soft encode
            } // from wms/wmts api path parameters


            cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
            return 'Custom (' + cleaned + ' )';
          };

          source.area = function () {
            return -2; // sources in background pane are sorted by area
          };

          return source;
        };

        function rendererTileLayer(context) {
          var transformProp = utilPrefixCSSProperty('Transform');
          var tiler = utilTiler();
          var _tileSize = 256;

          var _projection;

          var _cache = {};

          var _tileOrigin;

          var _zoom;

          var _source;

          function tileSizeAtZoom(d, z) {
            var EPSILON = 0.002; // close seams

            return _tileSize * Math.pow(2, z - d[2]) / _tileSize + EPSILON;
          }

          function atZoom(t, distance) {
            var power = Math.pow(2, distance);
            return [Math.floor(t[0] * power), Math.floor(t[1] * power), t[2] + distance];
          }

          function lookUp(d) {
            for (var up = -1; up > -d[2]; up--) {
              var tile = atZoom(d, up);

              if (_cache[_source.url(tile)] !== false) {
                return tile;
              }
            }
          }

          function uniqueBy(a, n) {
            var o = [];
            var seen = {};

            for (var i = 0; i < a.length; i++) {
              if (seen[a[i][n]] === undefined) {
                o.push(a[i]);
                seen[a[i][n]] = true;
              }
            }

            return o;
          }

          function addSource(d) {
            d.push(_source.url(d));
            return d;
          } // Update tiles based on current state of `projection`.


          function background(selection) {
            _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
            var pixelOffset;

            if (_source) {
              pixelOffset = [_source.offset()[0] * Math.pow(2, _zoom), _source.offset()[1] * Math.pow(2, _zoom)];
            } else {
              pixelOffset = [0, 0];
            }

            var translate = [_projection.translate()[0] + pixelOffset[0], _projection.translate()[1] + pixelOffset[1]];
            tiler.scale(_projection.scale() * 2 * Math.PI).translate(translate);
            _tileOrigin = [_projection.scale() * Math.PI - translate[0], _projection.scale() * Math.PI - translate[1]];
            render(selection);
          } // Derive the tiles onscreen, remove those offscreen and position them.
          // Important that this part not depend on `_projection` because it's
          // rentered when tiles load/error (see #644).


          function render(selection) {
            if (!_source) return;
            var requests = [];
            var showDebug = context.getDebug('tile') && !_source.overlay;

            if (_source.validZoom(_zoom)) {
              tiler.skipNullIsland(!!_source.overlay);
              tiler().forEach(function (d) {
                addSource(d);
                if (d[3] === '') return;
                if (typeof d[3] !== 'string') return; // Workaround for #2295

                requests.push(d);

                if (_cache[d[3]] === false && lookUp(d)) {
                  requests.push(addSource(lookUp(d)));
                }
              });
              requests = uniqueBy(requests, 3).filter(function (r) {
                // don't re-request tiles which have failed in the past
                return _cache[r[3]] !== false;
              });
            }

            function load(d3_event, d) {
              _cache[d[3]] = true;
              select(this).on('error', null).on('load', null).classed('tile-loaded', true);
              render(selection);
            }

            function error(d3_event, d) {
              _cache[d[3]] = false;
              select(this).on('error', null).on('load', null).remove();
              render(selection);
            }

            function imageTransform(d) {
              var ts = _tileSize * Math.pow(2, _zoom - d[2]);

              var scale = tileSizeAtZoom(d, _zoom);
              return 'translate(' + (d[0] * ts - _tileOrigin[0]) + 'px,' + (d[1] * ts - _tileOrigin[1]) + 'px) ' + 'scale(' + scale + ',' + scale + ')';
            }

            function tileCenter(d) {
              var ts = _tileSize * Math.pow(2, _zoom - d[2]);

              return [d[0] * ts - _tileOrigin[0] + ts / 2, d[1] * ts - _tileOrigin[1] + ts / 2];
            }

            function debugTransform(d) {
              var coord = tileCenter(d);
              return 'translate(' + coord[0] + 'px,' + coord[1] + 'px)';
            } // Pick a representative tile near the center of the viewport
            // (This is useful for sampling the imagery vintage)


            var dims = tiler.size();
            var mapCenter = [dims[0] / 2, dims[1] / 2];
            var minDist = Math.max(dims[0], dims[1]);
            var nearCenter;
            requests.forEach(function (d) {
              var c = tileCenter(d);
              var dist = geoVecLength(c, mapCenter);

              if (dist < minDist) {
                minDist = dist;
                nearCenter = d;
              }
            });
            var image = selection.selectAll('img').data(requests, function (d) {
              return d[3];
            });
            image.exit().style(transformProp, imageTransform).classed('tile-removing', true).classed('tile-center', false).each(function () {
              var tile = select(this);
              window.setTimeout(function () {
                if (tile.classed('tile-removing')) {
                  tile.remove();
                }
              }, 300);
            });
            image.enter().append('img').attr('class', 'tile').attr('draggable', 'false').style('width', _tileSize + 'px').style('height', _tileSize + 'px').attr('src', function (d) {
              return d[3];
            }).on('error', error).on('load', load).merge(image).style(transformProp, imageTransform).classed('tile-debug', showDebug).classed('tile-removing', false).classed('tile-center', function (d) {
              return d === nearCenter;
            });
            var debug = selection.selectAll('.tile-label-debug').data(showDebug ? requests : [], function (d) {
              return d[3];
            });
            debug.exit().remove();

            if (showDebug) {
              var debugEnter = debug.enter().append('div').attr('class', 'tile-label-debug');
              debugEnter.append('div').attr('class', 'tile-label-debug-coord');
              debugEnter.append('div').attr('class', 'tile-label-debug-vintage');
              debug = debug.merge(debugEnter);
              debug.style(transformProp, debugTransform);
              debug.selectAll('.tile-label-debug-coord').html(function (d) {
                return d[2] + ' / ' + d[0] + ' / ' + d[1];
              });
              debug.selectAll('.tile-label-debug-vintage').each(function (d) {
                var span = select(this);
                var center = context.projection.invert(tileCenter(d));

                _source.getMetadata(center, d, function (err, result) {
                  span.html(result && result.vintage && result.vintage.range || _t('info_panels.background.vintage') + ': ' + _t('info_panels.background.unknown'));
                });
              });
            }
          }

          background.projection = function (val) {
            if (!arguments.length) return _projection;
            _projection = val;
            return background;
          };

          background.dimensions = function (val) {
            if (!arguments.length) return tiler.size();
            tiler.size(val);
            return background;
          };

          background.source = function (val) {
            if (!arguments.length) return _source;
            _source = val;
            _tileSize = _source.tileSize;
            _cache = {};
            tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
            return background;
          };

          return background;
        }

        var _imageryIndex = null;
        function rendererBackground(context) {
          var dispatch = dispatch$8('change');
          var detected = utilDetect();
          var baseLayer = rendererTileLayer(context).projection(context.projection);
          var _isValid = true;
          var _overlayLayers = [];
          var _brightness = 1;
          var _contrast = 1;
          var _saturation = 1;
          var _sharpness = 1;

          function ensureImageryIndex() {
            return _mainFileFetcher.get('imagery').then(function (sources) {
              if (_imageryIndex) return _imageryIndex;
              _imageryIndex = {
                imagery: sources,
                features: {}
              }; // use which-polygon to support efficient index and querying for imagery

              var features = sources.map(function (source) {
                if (!source.polygon) return null; // workaround for editor-layer-index weirdness..
                // Add an extra array nest to each element in `source.polygon`
                // so the rings are not treated as a bunch of holes:
                // what we have: [ [[outer],[hole],[hole]] ]
                // what we want: [ [[outer]],[[outer]],[[outer]] ]

                var rings = source.polygon.map(function (ring) {
                  return [ring];
                });
                var feature = {
                  type: 'Feature',
                  properties: {
                    id: source.id
                  },
                  geometry: {
                    type: 'MultiPolygon',
                    coordinates: rings
                  }
                };
                _imageryIndex.features[source.id] = feature;
                return feature;
              }).filter(Boolean);
              _imageryIndex.query = whichPolygon_1({
                type: 'FeatureCollection',
                features: features
              }); // Instantiate `rendererBackgroundSource` objects for each source

              _imageryIndex.backgrounds = sources.map(function (source) {
                if (source.type === 'bing') {
                  return rendererBackgroundSource.Bing(source, dispatch);
                } else if (/^EsriWorldImagery/.test(source.id)) {
                  return rendererBackgroundSource.Esri(source);
                } else {
                  return rendererBackgroundSource(source);
                }
              }); // Add 'None'

              _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None()); // Add 'Custom'


              var template = corePreferences('background-custom-template') || '';
              var custom = rendererBackgroundSource.Custom(template);

              _imageryIndex.backgrounds.unshift(custom);

              return _imageryIndex;
            });
          }

          function background(selection) {
            var currSource = baseLayer.source(); // If we are displaying an Esri basemap at high zoom,
            // check its tilemap to see how high the zoom can go

            if (context.map().zoom() > 18) {
              if (currSource && /^EsriWorldImagery/.test(currSource.id)) {
                var center = context.map().center();
                currSource.fetchTilemap(center);
              }
            } // Is the imagery valid here? - #4827


            var sources = background.sources(context.map().extent());
            var wasValid = _isValid;
            _isValid = !!sources.filter(function (d) {
              return d === currSource;
            }).length;

            if (wasValid !== _isValid) {
              // change in valid status
              background.updateImagery();
            }

            var baseFilter = '';

            if (detected.cssfilters) {
              if (_brightness !== 1) {
                baseFilter += " brightness(".concat(_brightness, ")");
              }

              if (_contrast !== 1) {
                baseFilter += " contrast(".concat(_contrast, ")");
              }

              if (_saturation !== 1) {
                baseFilter += " saturate(".concat(_saturation, ")");
              }

              if (_sharpness < 1) {
                // gaussian blur
                var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
                baseFilter += " blur(".concat(blur, "px)");
              }
            }

            var base = selection.selectAll('.layer-background').data([0]);
            base = base.enter().insert('div', '.layer-data').attr('class', 'layer layer-background').merge(base);

            if (detected.cssfilters) {
              base.style('filter', baseFilter || null);
            } else {
              base.style('opacity', _brightness);
            }

            var imagery = base.selectAll('.layer-imagery').data([0]);
            imagery.enter().append('div').attr('class', 'layer layer-imagery').merge(imagery).call(baseLayer);
            var maskFilter = '';
            var mixBlendMode = '';

            if (detected.cssfilters && _sharpness > 1) {
              // apply unsharp mask
              mixBlendMode = 'overlay';
              maskFilter = 'saturate(0) blur(3px) invert(1)';
              var contrast = _sharpness - 1;
              maskFilter += " contrast(".concat(contrast, ")");
              var brightness = d3_interpolateNumber(1, 0.85)(_sharpness - 1);
              maskFilter += " brightness(".concat(brightness, ")");
            }

            var mask = base.selectAll('.layer-unsharp-mask').data(detected.cssfilters && _sharpness > 1 ? [0] : []);
            mask.exit().remove();
            mask.enter().append('div').attr('class', 'layer layer-mask layer-unsharp-mask').merge(mask).call(baseLayer).style('filter', maskFilter || null).style('mix-blend-mode', mixBlendMode || null);
            var overlays = selection.selectAll('.layer-overlay').data(_overlayLayers, function (d) {
              return d.source().name();
            });
            overlays.exit().remove();
            overlays.enter().insert('div', '.layer-data').attr('class', 'layer layer-overlay').merge(overlays).each(function (layer, i, nodes) {
              return select(nodes[i]).call(layer);
            });
          }

          background.updateImagery = function () {
            var currSource = baseLayer.source();
            if (context.inIntro() || !currSource) return;

            var o = _overlayLayers.filter(function (d) {
              return !d.source().isLocatorOverlay() && !d.source().isHidden();
            }).map(function (d) {
              return d.source().id;
            }).join(',');

            var meters = geoOffsetToMeters(currSource.offset());
            var EPSILON = 0.01;
            var x = +meters[0].toFixed(2);
            var y = +meters[1].toFixed(2);
            var hash = utilStringQs(window.location.hash);
            var id = currSource.id;

            if (id === 'custom') {
              id = "custom:".concat(currSource.template());
            }

            if (id) {
              hash.background = id;
            } else {
              delete hash.background;
            }

            if (o) {
              hash.overlays = o;
            } else {
              delete hash.overlays;
            }

            if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
              hash.offset = "".concat(x, ",").concat(y);
            } else {
              delete hash.offset;
            }

            if (!window.mocha) {
              window.location.replace('#' + utilQsString(hash, true));
            }

            var imageryUsed = [];
            var photoOverlaysUsed = [];
            var currUsed = currSource.imageryUsed();

            if (currUsed && _isValid) {
              imageryUsed.push(currUsed);
            }

            _overlayLayers.filter(function (d) {
              return !d.source().isLocatorOverlay() && !d.source().isHidden();
            }).forEach(function (d) {
              return imageryUsed.push(d.source().imageryUsed());
            });

            var dataLayer = context.layers().layer('data');

            if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
              imageryUsed.push(dataLayer.getSrc());
            }

            var photoOverlayLayers = {
              streetside: 'Bing Streetside',
              mapillary: 'Mapillary Images',
              'mapillary-map-features': 'Mapillary Map Features',
              'mapillary-signs': 'Mapillary Signs',
              openstreetcam: 'OpenStreetCam Images'
            };

            for (var layerID in photoOverlayLayers) {
              var layer = context.layers().layer(layerID);

              if (layer && layer.enabled()) {
                photoOverlaysUsed.push(layerID);
                imageryUsed.push(photoOverlayLayers[layerID]);
              }
            }

            context.history().imageryUsed(imageryUsed);
            context.history().photoOverlaysUsed(photoOverlaysUsed);
          };

          var _checkedBlocklists;

          background.sources = function (extent, zoom, includeCurrent) {
            if (!_imageryIndex) return []; // called before init()?

            var visible = {};
            (_imageryIndex.query.bbox(extent.rectangle(), true) || []).forEach(function (d) {
              return visible[d.id] = true;
            });
            var currSource = baseLayer.source();
            var osm = context.connection();
            var blocklists = osm && osm.imageryBlocklists();

            if (blocklists && blocklists !== _checkedBlocklists) {
              _imageryIndex.backgrounds.forEach(function (source) {
                source.isBlocked = blocklists.some(function (blocklist) {
                  return blocklist.test(source.template());
                });
              });

              _checkedBlocklists = blocklists;
            }

            return _imageryIndex.backgrounds.filter(function (source) {
              if (includeCurrent && currSource === source) return true; // optionally always include the current imagery

              if (source.isBlocked) return false; // even bundled sources may be blocked - #7905

              if (!source.polygon) return true; // always include imagery with worldwide coverage

              if (zoom && zoom < 6) return false; // optionally exclude local imagery at low zooms

              return visible[source.id]; // include imagery visible in given extent
            });
          };

          background.dimensions = function (val) {
            if (!val) return;
            baseLayer.dimensions(val);

            _overlayLayers.forEach(function (layer) {
              return layer.dimensions(val);
            });
          };

          background.baseLayerSource = function (d) {
            if (!arguments.length) return baseLayer.source(); // test source against OSM imagery blocklists..

            var osm = context.connection();
            if (!osm) return background;
            var blocklists = osm.imageryBlocklists();
            var template = d.template();
            var fail = false;
            var tested = 0;
            var regex;

            for (var i = 0; i < blocklists.length; i++) {
              regex = blocklists[i];
              fail = regex.test(template);
              tested++;
              if (fail) break;
            } // ensure at least one test was run.


            if (!tested) {
              regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
              fail = regex.test(template);
            }

            baseLayer.source(!fail ? d : background.findSource('none'));
            dispatch.call('change');
            background.updateImagery();
            return background;
          };

          background.findSource = function (id) {
            if (!id || !_imageryIndex) return null; // called before init()?

            return _imageryIndex.backgrounds.find(function (d) {
              return d.id && d.id === id;
            });
          };

          background.bing = function () {
            background.baseLayerSource(background.findSource('Bing'));
          };

          background.showsLayer = function (d) {
            var currSource = baseLayer.source();
            if (!d || !currSource) return false;
            return d.id === currSource.id || _overlayLayers.some(function (layer) {
              return d.id === layer.source().id;
            });
          };

          background.overlayLayerSources = function () {
            return _overlayLayers.map(function (layer) {
              return layer.source();
            });
          };

          background.toggleOverlayLayer = function (d) {
            var layer;

            for (var i = 0; i < _overlayLayers.length; i++) {
              layer = _overlayLayers[i];

              if (layer.source() === d) {
                _overlayLayers.splice(i, 1);

                dispatch.call('change');
                background.updateImagery();
                return;
              }
            }

            layer = rendererTileLayer(context).source(d).projection(context.projection).dimensions(baseLayer.dimensions());

            _overlayLayers.push(layer);

            dispatch.call('change');
            background.updateImagery();
          };

          background.nudge = function (d, zoom) {
            var currSource = baseLayer.source();

            if (currSource) {
              currSource.nudge(d, zoom);
              dispatch.call('change');
              background.updateImagery();
            }

            return background;
          };

          background.offset = function (d) {
            var currSource = baseLayer.source();

            if (!arguments.length) {
              return currSource && currSource.offset() || [0, 0];
            }

            if (currSource) {
              currSource.offset(d);
              dispatch.call('change');
              background.updateImagery();
            }

            return background;
          };

          background.brightness = function (d) {
            if (!arguments.length) return _brightness;
            _brightness = d;
            if (context.mode()) dispatch.call('change');
            return background;
          };

          background.contrast = function (d) {
            if (!arguments.length) return _contrast;
            _contrast = d;
            if (context.mode()) dispatch.call('change');
            return background;
          };

          background.saturation = function (d) {
            if (!arguments.length) return _saturation;
            _saturation = d;
            if (context.mode()) dispatch.call('change');
            return background;
          };

          background.sharpness = function (d) {
            if (!arguments.length) return _sharpness;
            _sharpness = d;
            if (context.mode()) dispatch.call('change');
            return background;
          };

          var _loadPromise;

          background.ensureLoaded = function () {
            if (_loadPromise) return _loadPromise;

            function parseMapParams(qmap) {
              if (!qmap) return false;
              var params = qmap.split('/').map(Number);
              if (params.length < 3 || params.some(isNaN)) return false;
              return geoExtent([params[2], params[1]]); // lon,lat
            }

            var hash = utilStringQs(window.location.hash);
            var requested = hash.background || hash.layer;
            var extent = parseMapParams(hash.map);
            return _loadPromise = ensureImageryIndex().then(function (imageryIndex) {
              var first = imageryIndex.backgrounds.length && imageryIndex.backgrounds[0];
              var best;

              if (!requested && extent) {
                best = background.sources(extent).find(function (s) {
                  return s.best();
                });
              } // Decide which background layer to display


              if (requested && requested.indexOf('custom:') === 0) {
                var template = requested.replace(/^custom:/, '');
                var custom = background.findSource('custom');
                background.baseLayerSource(custom.template(template));
                corePreferences('background-custom-template', template);
              } else {
                background.baseLayerSource(background.findSource(requested) || best || background.findSource(corePreferences('background-last-used')) || background.findSource('Bing') || first || background.findSource('none'));
              }

              var locator = imageryIndex.backgrounds.find(function (d) {
                return d.overlay && d["default"];
              });

              if (locator) {
                background.toggleOverlayLayer(locator);
              }

              var overlays = (hash.overlays || '').split(',');
              overlays.forEach(function (overlay) {
                overlay = background.findSource(overlay);

                if (overlay) {
                  background.toggleOverlayLayer(overlay);
                }
              });

              if (hash.gpx) {
                var gpx = context.layers().layer('data');

                if (gpx) {
                  gpx.url(hash.gpx, '.gpx');
                }
              }

              if (hash.offset) {
                var offset = hash.offset.replace(/;/g, ',').split(',').map(function (n) {
                  return !isNaN(n) && n;
                });

                if (offset.length === 2) {
                  background.offset(geoMetersToOffset(offset));
                }
              }
            })["catch"](function () {
              /* ignore */
            });
          };

          return utilRebind(background, dispatch, 'on');
        }

        function rendererFeatures(context) {
          var dispatch = dispatch$8('change', 'redraw');
          var features = utilRebind({}, dispatch, 'on');

          var _deferred = new Set();

          var traffic_roads = {
            'motorway': true,
            'motorway_link': true,
            'trunk': true,
            'trunk_link': true,
            'primary': true,
            'primary_link': true,
            'secondary': true,
            'secondary_link': true,
            'tertiary': true,
            'tertiary_link': true,
            'residential': true,
            'unclassified': true,
            'living_street': true
          };
          var service_roads = {
            'service': true,
            'road': true,
            'track': true
          };
          var paths = {
            'path': true,
            'footway': true,
            'cycleway': true,
            'bridleway': true,
            'steps': true,
            'pedestrian': true
          };
          var past_futures = {
            'proposed': true,
            'construction': true,
            'abandoned': true,
            'dismantled': true,
            'disused': true,
            'razed': true,
            'demolished': true,
            'obliterated': true
          };
          var _cullFactor = 1;
          var _cache = {};
          var _rules = {};
          var _stats = {};
          var _keys = [];
          var _hidden = [];
          var _forceVisible = {};

          function update() {
            if (!window.mocha) {
              var hash = utilStringQs(window.location.hash);
              var disabled = features.disabled();

              if (disabled.length) {
                hash.disable_features = disabled.join(',');
              } else {
                delete hash.disable_features;
              }

              window.location.replace('#' + utilQsString(hash, true));
              corePreferences('disabled-features', disabled.join(','));
            }

            _hidden = features.hidden();
            dispatch.call('change');
            dispatch.call('redraw');
          }

          function defineRule(k, filter, max) {
            var isEnabled = true;

            _keys.push(k);

            _rules[k] = {
              filter: filter,
              enabled: isEnabled,
              // whether the user wants it enabled..
              count: 0,
              currentMax: max || Infinity,
              defaultMax: max || Infinity,
              enable: function enable() {
                this.enabled = true;
                this.currentMax = this.defaultMax;
              },
              disable: function disable() {
                this.enabled = false;
                this.currentMax = 0;
              },
              hidden: function hidden() {
                return this.count === 0 && !this.enabled || this.count > this.currentMax * _cullFactor;
              },
              autoHidden: function autoHidden() {
                return this.hidden() && this.currentMax > 0;
              }
            };
          }

          defineRule('points', function isPoint(tags, geometry) {
            return geometry === 'point';
          }, 200);
          defineRule('traffic_roads', function isTrafficRoad(tags) {
            return traffic_roads[tags.highway];
          });
          defineRule('service_roads', function isServiceRoad(tags) {
            return service_roads[tags.highway];
          });
          defineRule('paths', function isPath(tags) {
            return paths[tags.highway];
          });
          defineRule('buildings', function isBuilding(tags) {
            return !!tags.building && tags.building !== 'no' || tags.parking === 'multi-storey' || tags.parking === 'sheds' || tags.parking === 'carports' || tags.parking === 'garage_boxes';
          }, 250);
          defineRule('building_parts', function isBuildingPart(tags) {
            return tags['building:part'];
          });
          defineRule('indoor', function isIndoor(tags) {
            return tags.indoor;
          });
          defineRule('landuse', function isLanduse(tags, geometry) {
            return geometry === 'area' && !_rules.buildings.filter(tags) && !_rules.building_parts.filter(tags) && !_rules.indoor.filter(tags) && !_rules.water.filter(tags) && !_rules.pistes.filter(tags);
          });
          defineRule('boundaries', function isBoundary(tags) {
            return !!tags.boundary && !(traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway] || tags.waterway || tags.railway || tags.landuse || tags.natural || tags.building || tags.power);
          });
          defineRule('water', function isWater(tags) {
            return !!tags.waterway || tags.natural === 'water' || tags.natural === 'coastline' || tags.natural === 'bay' || tags.landuse === 'pond' || tags.landuse === 'basin' || tags.landuse === 'reservoir' || tags.landuse === 'salt_pond';
          });
          defineRule('rail', function isRail(tags) {
            return (!!tags.railway || tags.landuse === 'railway') && !(traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]);
          });
          defineRule('pistes', function isPiste(tags) {
            return tags['piste:type'];
          });
          defineRule('aerialways', function isPiste(tags) {
            return tags.aerialway && tags.aerialway !== 'yes' && tags.aerialway !== 'station';
          });
          defineRule('power', function isPower(tags) {
            return !!tags.power;
          }); // contains a past/future tag, but not in active use as a road/path/cycleway/etc..

          defineRule('past_future', function isPastFuture(tags) {
            if (traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]) {
              return false;
            }

            var strings = Object.keys(tags);

            for (var i = 0; i < strings.length; i++) {
              var s = strings[i];

              if (past_futures[s] || past_futures[tags[s]]) {
                return true;
              }
            }

            return false;
          }); // Lines or areas that don't match another feature filter.
          // IMPORTANT: The 'others' feature must be the last one defined,
          //   so that code in getMatches can skip this test if `hasMatch = true`

          defineRule('others', function isOther(tags, geometry) {
            return geometry === 'line' || geometry === 'area';
          });

          features.features = function () {
            return _rules;
          };

          features.keys = function () {
            return _keys;
          };

          features.enabled = function (k) {
            if (!arguments.length) {
              return _keys.filter(function (k) {
                return _rules[k].enabled;
              });
            }

            return _rules[k] && _rules[k].enabled;
          };

          features.disabled = function (k) {
            if (!arguments.length) {
              return _keys.filter(function (k) {
                return !_rules[k].enabled;
              });
            }

            return _rules[k] && !_rules[k].enabled;
          };

          features.hidden = function (k) {
            if (!arguments.length) {
              return _keys.filter(function (k) {
                return _rules[k].hidden();
              });
            }

            return _rules[k] && _rules[k].hidden();
          };

          features.autoHidden = function (k) {
            if (!arguments.length) {
              return _keys.filter(function (k) {
                return _rules[k].autoHidden();
              });
            }

            return _rules[k] && _rules[k].autoHidden();
          };

          features.enable = function (k) {
            if (_rules[k] && !_rules[k].enabled) {
              _rules[k].enable();

              update();
            }
          };

          features.enableAll = function () {
            var didEnable = false;

            for (var k in _rules) {
              if (!_rules[k].enabled) {
                didEnable = true;

                _rules[k].enable();
              }
            }

            if (didEnable) update();
          };

          features.disable = function (k) {
            if (_rules[k] && _rules[k].enabled) {
              _rules[k].disable();

              update();
            }
          };

          features.disableAll = function () {
            var didDisable = false;

            for (var k in _rules) {
              if (_rules[k].enabled) {
                didDisable = true;

                _rules[k].disable();
              }
            }

            if (didDisable) update();
          };

          features.toggle = function (k) {
            if (_rules[k]) {
              (function (f) {
                return f.enabled ? f.disable() : f.enable();
              })(_rules[k]);

              update();
            }
          };

          features.resetStats = function () {
            for (var i = 0; i < _keys.length; i++) {
              _rules[_keys[i]].count = 0;
            }

            dispatch.call('change');
          };

          features.gatherStats = function (d, resolver, dimensions) {
            var needsRedraw = false;
            var types = utilArrayGroupBy(d, 'type');
            var entities = [].concat(types.relation || [], types.way || [], types.node || []);
            var currHidden, geometry, matches, i, j;

            for (i = 0; i < _keys.length; i++) {
              _rules[_keys[i]].count = 0;
            } // adjust the threshold for point/building culling based on viewport size..
            // a _cullFactor of 1 corresponds to a 1000x1000px viewport..


            _cullFactor = dimensions[0] * dimensions[1] / 1000000;

            for (i = 0; i < entities.length; i++) {
              geometry = entities[i].geometry(resolver);
              matches = Object.keys(features.getMatches(entities[i], resolver, geometry));

              for (j = 0; j < matches.length; j++) {
                _rules[matches[j]].count++;
              }
            }

            currHidden = features.hidden();

            if (currHidden !== _hidden) {
              _hidden = currHidden;
              needsRedraw = true;
              dispatch.call('change');
            }

            return needsRedraw;
          };

          features.stats = function () {
            for (var i = 0; i < _keys.length; i++) {
              _stats[_keys[i]] = _rules[_keys[i]].count;
            }

            return _stats;
          };

          features.clear = function (d) {
            for (var i = 0; i < d.length; i++) {
              features.clearEntity(d[i]);
            }
          };

          features.clearEntity = function (entity) {
            delete _cache[osmEntity.key(entity)];
          };

          features.reset = function () {
            Array.from(_deferred).forEach(function (handle) {
              window.cancelIdleCallback(handle);

              _deferred["delete"](handle);
            });
            _cache = {};
          }; // only certain relations are worth checking


          function relationShouldBeChecked(relation) {
            // multipolygon features have `area` geometry and aren't checked here
            return relation.tags.type === 'boundary';
          }

          features.getMatches = function (entity, resolver, geometry) {
            if (geometry === 'vertex' || geometry === 'relation' && !relationShouldBeChecked(entity)) return {};
            var ent = osmEntity.key(entity);

            if (!_cache[ent]) {
              _cache[ent] = {};
            }

            if (!_cache[ent].matches) {
              var matches = {};
              var hasMatch = false;

              for (var i = 0; i < _keys.length; i++) {
                if (_keys[i] === 'others') {
                  if (hasMatch) continue; // If an entity...
                  //   1. is a way that hasn't matched other 'interesting' feature rules,

                  if (entity.type === 'way') {
                    var parents = features.getParents(entity, resolver, geometry); //   2a. belongs only to a single multipolygon relation

                    if (parents.length === 1 && parents[0].isMultipolygon() || // 2b. or belongs only to boundary relations
                    parents.length > 0 && parents.every(function (parent) {
                      return parent.tags.type === 'boundary';
                    })) {
                      // ...then match whatever feature rules the parent relation has matched.
                      // see #2548, #2887
                      //
                      // IMPORTANT:
                      // For this to work, getMatches must be called on relations before ways.
                      //
                      var pkey = osmEntity.key(parents[0]);

                      if (_cache[pkey] && _cache[pkey].matches) {
                        matches = Object.assign({}, _cache[pkey].matches); // shallow copy

                        continue;
                      }
                    }
                  }
                }

                if (_rules[_keys[i]].filter(entity.tags, geometry)) {
                  matches[_keys[i]] = hasMatch = true;
                }
              }

              _cache[ent].matches = matches;
            }

            return _cache[ent].matches;
          };

          features.getParents = function (entity, resolver, geometry) {
            if (geometry === 'point') return [];
            var ent = osmEntity.key(entity);

            if (!_cache[ent]) {
              _cache[ent] = {};
            }

            if (!_cache[ent].parents) {
              var parents = [];

              if (geometry === 'vertex') {
                parents = resolver.parentWays(entity);
              } else {
                // 'line', 'area', 'relation'
                parents = resolver.parentRelations(entity);
              }

              _cache[ent].parents = parents;
            }

            return _cache[ent].parents;
          };

          features.isHiddenPreset = function (preset, geometry) {
            if (!_hidden.length) return false;
            if (!preset.tags) return false;
            var test = preset.setTags({}, geometry);

            for (var key in _rules) {
              if (_rules[key].filter(test, geometry)) {
                if (_hidden.indexOf(key) !== -1) {
                  return key;
                }

                return false;
              }
            }

            return false;
          };

          features.isHiddenFeature = function (entity, resolver, geometry) {
            if (!_hidden.length) return false;
            if (!entity.version) return false;
            if (_forceVisible[entity.id]) return false;
            var matches = Object.keys(features.getMatches(entity, resolver, geometry));
            return matches.length && matches.every(function (k) {
              return features.hidden(k);
            });
          };

          features.isHiddenChild = function (entity, resolver, geometry) {
            if (!_hidden.length) return false;
            if (!entity.version || geometry === 'point') return false;
            if (_forceVisible[entity.id]) return false;
            var parents = features.getParents(entity, resolver, geometry);
            if (!parents.length) return false;

            for (var i = 0; i < parents.length; i++) {
              if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
                return false;
              }
            }

            return true;
          };

          features.hasHiddenConnections = function (entity, resolver) {
            if (!_hidden.length) return false;
            var childNodes, connections;

            if (entity.type === 'midpoint') {
              childNodes = [resolver.entity(entity.edge[0]), resolver.entity(entity.edge[1])];
              connections = [];
            } else {
              childNodes = entity.nodes ? resolver.childNodes(entity) : [];
              connections = features.getParents(entity, resolver, entity.geometry(resolver));
            } // gather ways connected to child nodes..


            connections = childNodes.reduce(function (result, e) {
              return resolver.isShared(e) ? utilArrayUnion(result, resolver.parentWays(e)) : result;
            }, connections);
            return connections.some(function (e) {
              return features.isHidden(e, resolver, e.geometry(resolver));
            });
          };

          features.isHidden = function (entity, resolver, geometry) {
            if (!_hidden.length) return false;
            if (!entity.version) return false;
            var fn = geometry === 'vertex' ? features.isHiddenChild : features.isHiddenFeature;
            return fn(entity, resolver, geometry);
          };

          features.filter = function (d, resolver) {
            if (!_hidden.length) return d;
            var result = [];

            for (var i = 0; i < d.length; i++) {
              var entity = d[i];

              if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
                result.push(entity);
              }
            }

            return result;
          };

          features.forceVisible = function (entityIDs) {
            if (!arguments.length) return Object.keys(_forceVisible);
            _forceVisible = {};

            for (var i = 0; i < entityIDs.length; i++) {
              _forceVisible[entityIDs[i]] = true;
              var entity = context.hasEntity(entityIDs[i]);

              if (entity && entity.type === 'relation') {
                // also show relation members (one level deep)
                for (var j in entity.members) {
                  _forceVisible[entity.members[j].id] = true;
                }
              }
            }

            return features;
          };

          features.init = function () {
            var storage = corePreferences('disabled-features');

            if (storage) {
              var storageDisabled = storage.replace(/;/g, ',').split(',');
              storageDisabled.forEach(features.disable);
            }

            var hash = utilStringQs(window.location.hash);

            if (hash.disable_features) {
              var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
              hashDisabled.forEach(features.disable);
            }
          }; // warm up the feature matching cache upon merging fetched data


          context.history().on('merge.features', function (newEntities) {
            if (!newEntities) return;
            var handle = window.requestIdleCallback(function () {
              var graph = context.graph();
              var types = utilArrayGroupBy(newEntities, 'type'); // ensure that getMatches is called on relations before ways

              var entities = [].concat(types.relation || [], types.way || [], types.node || []);

              for (var i = 0; i < entities.length; i++) {
                var geometry = entities[i].geometry(graph);
                features.getMatches(entities[i], graph, geometry);
              }
            });

            _deferred.add(handle);
          });
          return features;
        }

        /** Error message constants. */

        var FUNC_ERROR_TEXT = 'Expected a function';
        /**
         * Creates a throttled function that only invokes `func` at most once per
         * every `wait` milliseconds. The throttled function comes with a `cancel`
         * method to cancel delayed `func` invocations and a `flush` method to
         * immediately invoke them. Provide `options` to indicate whether `func`
         * should be invoked on the leading and/or trailing edge of the `wait`
         * timeout. The `func` is invoked with the last arguments provided to the
         * throttled function. Subsequent calls to the throttled function return the
         * result of the last `func` invocation.
         *
         * **Note:** If `leading` and `trailing` options are `true`, `func` is
         * invoked on the trailing edge of the timeout only if the throttled function
         * is invoked more than once during the `wait` timeout.
         *
         * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
         * until to the next tick, similar to `setTimeout` with a timeout of `0`.
         *
         * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
         * for details over the differences between `_.throttle` and `_.debounce`.
         *
         * @static
         * @memberOf _
         * @since 0.1.0
         * @category Function
         * @param {Function} func The function to throttle.
         * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
         * @param {Object} [options={}] The options object.
         * @param {boolean} [options.leading=true]
         *  Specify invoking on the leading edge of the timeout.
         * @param {boolean} [options.trailing=true]
         *  Specify invoking on the trailing edge of the timeout.
         * @returns {Function} Returns the new throttled function.
         * @example
         *
         * // Avoid excessively updating the position while scrolling.
         * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
         *
         * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
         * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
         * jQuery(element).on('click', throttled);
         *
         * // Cancel the trailing throttled invocation.
         * jQuery(window).on('popstate', throttled.cancel);
         */

        function throttle(func, wait, options) {
          var leading = true,
              trailing = true;

          if (typeof func != 'function') {
            throw new TypeError(FUNC_ERROR_TEXT);
          }

          if (isObject$2(options)) {
            leading = 'leading' in options ? !!options.leading : leading;
            trailing = 'trailing' in options ? !!options.trailing : trailing;
          }

          return debounce(func, wait, {
            'leading': leading,
            'maxWait': wait,
            'trailing': trailing
          });
        }

        //
        // - the activeID - nope
        // - 1 away (adjacent) to the activeID - yes (vertices will be merged)
        // - 2 away from the activeID - nope (would create a self intersecting segment)
        // - all others on a linear way - yes
        // - all others on a closed way - nope (would create a self intersecting polygon)
        //
        // returns
        // 0 = active vertex - no touch/connect
        // 1 = passive vertex - yes touch/connect
        // 2 = adjacent vertex - yes but pay attention segmenting a line here
        //

        function svgPassiveVertex(node, graph, activeID) {
          if (!activeID) return 1;
          if (activeID === node.id) return 0;
          var parents = graph.parentWays(node);
          var i, j, nodes, isClosed, ix1, ix2, ix3, ix4, max;

          for (i = 0; i < parents.length; i++) {
            nodes = parents[i].nodes;
            isClosed = parents[i].isClosed();

            for (j = 0; j < nodes.length; j++) {
              // find this vertex, look nearby
              if (nodes[j] === node.id) {
                ix1 = j - 2;
                ix2 = j - 1;
                ix3 = j + 1;
                ix4 = j + 2;

                if (isClosed) {
                  // wraparound if needed
                  max = nodes.length - 1;
                  if (ix1 < 0) ix1 = max + ix1;
                  if (ix2 < 0) ix2 = max + ix2;
                  if (ix3 > max) ix3 = ix3 - max;
                  if (ix4 > max) ix4 = ix4 - max;
                }

                if (nodes[ix1] === activeID) return 0; // no - prevent self intersect
                else if (nodes[ix2] === activeID) return 2; // ok - adjacent
                  else if (nodes[ix3] === activeID) return 2; // ok - adjacent
                    else if (nodes[ix4] === activeID) return 0; // no - prevent self intersect
                      else if (isClosed && nodes.indexOf(activeID) !== -1) return 0; // no - prevent self intersect
              }
            }
          }

          return 1; // ok
        }
        function svgMarkerSegments(projection, graph, dt, shouldReverse, bothDirections) {
          return function (entity) {
            var i = 0;
            var offset = dt;
            var segments = [];
            var clip = d3_geoIdentity().clipExtent(projection.clipExtent()).stream;
            var coordinates = graph.childNodes(entity).map(function (n) {
              return n.loc;
            });
            var a, b;

            if (shouldReverse(entity)) {
              coordinates.reverse();
            }

            d3_geoStream({
              type: 'LineString',
              coordinates: coordinates
            }, projection.stream(clip({
              lineStart: function lineStart() {},
              lineEnd: function lineEnd() {
                a = null;
              },
              point: function point(x, y) {
                b = [x, y];

                if (a) {
                  var span = geoVecLength(a, b) - offset;

                  if (span >= 0) {
                    var heading = geoVecAngle(a, b);
                    var dx = dt * Math.cos(heading);
                    var dy = dt * Math.sin(heading);
                    var p = [a[0] + offset * Math.cos(heading), a[1] + offset * Math.sin(heading)]; // gather coordinates

                    var coord = [a, p];

                    for (span -= dt; span >= 0; span -= dt) {
                      p = geoVecAdd(p, [dx, dy]);
                      coord.push(p);
                    }

                    coord.push(b); // generate svg paths

                    var segment = '';
                    var j;

                    for (j = 0; j < coord.length; j++) {
                      segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
                    }

                    segments.push({
                      id: entity.id,
                      index: i++,
                      d: segment
                    });

                    if (bothDirections(entity)) {
                      segment = '';

                      for (j = coord.length - 1; j >= 0; j--) {
                        segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
                      }

                      segments.push({
                        id: entity.id,
                        index: i++,
                        d: segment
                      });
                    }
                  }

                  offset = -span;
                }

                a = b;
              }
            })));
            return segments;
          };
        }
        function svgPath(projection, graph, isArea) {
          // Explanation of magic numbers:
          // "padding" here allows space for strokes to extend beyond the viewport,
          // so that the stroke isn't drawn along the edge of the viewport when
          // the shape is clipped.
          //
          // When drawing lines, pad viewport by 5px.
          // When drawing areas, pad viewport by 65px in each direction to allow
          // for 60px area fill stroke (see ".fill-partial path.fill" css rule)
          var cache = {};
          var padding = isArea ? 65 : 5;
          var viewport = projection.clipExtent();
          var paddedExtent = [[viewport[0][0] - padding, viewport[0][1] - padding], [viewport[1][0] + padding, viewport[1][1] + padding]];
          var clip = d3_geoIdentity().clipExtent(paddedExtent).stream;
          var project = projection.stream;
          var path = d3_geoPath().projection({
            stream: function stream(output) {
              return project(clip(output));
            }
          });

          var svgpath = function svgpath(entity) {
            if (entity.id in cache) {
              return cache[entity.id];
            } else {
              return cache[entity.id] = path(entity.asGeoJSON(graph));
            }
          };

          svgpath.geojson = function (d) {
            if (d.__featurehash__ !== undefined) {
              if (d.__featurehash__ in cache) {
                return cache[d.__featurehash__];
              } else {
                return cache[d.__featurehash__] = path(d);
              }
            } else {
              return path(d);
            }
          };

          return svgpath;
        }
        function svgPointTransform(projection) {
          var svgpoint = function svgpoint(entity) {
            // http://jsperf.com/short-array-join
            var pt = projection(entity.loc);
            return 'translate(' + pt[0] + ',' + pt[1] + ')';
          };

          svgpoint.geojson = function (d) {
            return svgpoint(d.properties.entity);
          };

          return svgpoint;
        }
        function svgRelationMemberTags(graph) {
          return function (entity) {
            var tags = entity.tags;
            var shouldCopyMultipolygonTags = !entity.hasInterestingTags();
            graph.parentRelations(entity).forEach(function (relation) {
              var type = relation.tags.type;

              if (type === 'multipolygon' && shouldCopyMultipolygonTags || type === 'boundary') {
                tags = Object.assign({}, relation.tags, tags);
              }
            });
            return tags;
          };
        }
        function svgSegmentWay(way, graph, activeID) {
          // When there is no activeID, we can memoize this expensive computation
          if (activeID === undefined) {
            return graph["transient"](way, 'waySegments', getWaySegments);
          } else {
            return getWaySegments();
          }

          function getWaySegments() {
            var isActiveWay = way.nodes.indexOf(activeID) !== -1;
            var features = {
              passive: [],
              active: []
            };
            var start = {};
            var end = {};
            var node, type;

            for (var i = 0; i < way.nodes.length; i++) {
              node = graph.entity(way.nodes[i]);
              type = svgPassiveVertex(node, graph, activeID);
              end = {
                node: node,
                type: type
              };

              if (start.type !== undefined) {
                if (start.node.id === activeID || end.node.id === activeID) ; else if (isActiveWay && (start.type === 2 || end.type === 2)) {
                  // one adjacent vertex
                  pushActive(start, end, i);
                } else if (start.type === 0 && end.type === 0) {
                  // both active vertices
                  pushActive(start, end, i);
                } else {
                  pushPassive(start, end, i);
                }
              }

              start = end;
            }

            return features;

            function pushActive(start, end, index) {
              features.active.push({
                type: 'Feature',
                id: way.id + '-' + index + '-nope',
                properties: {
                  nope: true,
                  target: true,
                  entity: way,
                  nodes: [start.node, end.node],
                  index: index
                },
                geometry: {
                  type: 'LineString',
                  coordinates: [start.node.loc, end.node.loc]
                }
              });
            }

            function pushPassive(start, end, index) {
              features.passive.push({
                type: 'Feature',
                id: way.id + '-' + index,
                properties: {
                  target: true,
                  entity: way,
                  nodes: [start.node, end.node],
                  index: index
                },
                geometry: {
                  type: 'LineString',
                  coordinates: [start.node.loc, end.node.loc]
                }
              });
            }
          }
        }

        function svgTagClasses() {
          var primaries = ['building', 'highway', 'railway', 'waterway', 'aeroway', 'aerialway', 'piste:type', 'boundary', 'power', 'amenity', 'natural', 'landuse', 'leisure', 'military', 'place', 'man_made', 'route', 'attraction', 'building:part', 'indoor'];
          var statuses = [// nonexistent, might be built
          'proposed', 'planned', // under maintentance or between groundbreaking and opening
          'construction', // existent but not functional
          'disused', // dilapidated to nonexistent
          'abandoned', // nonexistent, still may appear in imagery
          'dismantled', 'razed', 'demolished', 'obliterated', // existent occasionally, e.g. stormwater drainage basin
          'intermittent'];
          var secondaries = ['oneway', 'bridge', 'tunnel', 'embankment', 'cutting', 'barrier', 'surface', 'tracktype', 'footway', 'crossing', 'service', 'sport', 'public_transport', 'location', 'parking', 'golf', 'type', 'leisure', 'man_made', 'indoor'];

          var _tags = function _tags(entity) {
            return entity.tags;
          };

          var tagClasses = function tagClasses(selection) {
            selection.each(function tagClassesEach(entity) {
              var value = this.className;

              if (value.baseVal !== undefined) {
                value = value.baseVal;
              }

              var t = _tags(entity);

              var computed = tagClasses.getClassesString(t, value);

              if (computed !== value) {
                select(this).attr('class', computed);
              }
            });
          };

          tagClasses.getClassesString = function (t, value) {
            var primary, status;
            var i, j, k, v; // in some situations we want to render perimeter strokes a certain way

            var overrideGeometry;

            if (/\bstroke\b/.test(value)) {
              if (!!t.barrier && t.barrier !== 'no') {
                overrideGeometry = 'line';
              }
            } // preserve base classes (nothing with `tag-`)


            var classes = value.trim().split(/\s+/).filter(function (klass) {
              return klass.length && !/^tag-/.test(klass);
            }).map(function (klass) {
              // special overrides for some perimeter strokes
              return klass === 'line' || klass === 'area' ? overrideGeometry || klass : klass;
            }); // pick at most one primary classification tag..

            for (i = 0; i < primaries.length; i++) {
              k = primaries[i];
              v = t[k];
              if (!v || v === 'no') continue;

              if (k === 'piste:type') {
                // avoid a ':' in the class name
                k = 'piste';
              } else if (k === 'building:part') {
                // avoid a ':' in the class name
                k = 'building_part';
              }

              primary = k;

              if (statuses.indexOf(v) !== -1) {
                // e.g. `railway=abandoned`
                status = v;
                classes.push('tag-' + k);
              } else {
                classes.push('tag-' + k);
                classes.push('tag-' + k + '-' + v);
              }

              break;
            }

            if (!primary) {
              for (i = 0; i < statuses.length; i++) {
                for (j = 0; j < primaries.length; j++) {
                  k = statuses[i] + ':' + primaries[j]; // e.g. `demolished:building=yes`

                  v = t[k];
                  if (!v || v === 'no') continue;
                  status = statuses[i];
                  break;
                }
              }
            } // add at most one status tag, only if relates to primary tag..


            if (!status) {
              for (i = 0; i < statuses.length; i++) {
                k = statuses[i];
                v = t[k];
                if (!v || v === 'no') continue;

                if (v === 'yes') {
                  // e.g. `railway=rail + abandoned=yes`
                  status = k;
                } else if (primary && primary === v) {
                  // e.g. `railway=rail + abandoned=railway`
                  status = k;
                } else if (!primary && primaries.indexOf(v) !== -1) {
                  // e.g. `abandoned=railway`
                  status = k;
                  primary = v;
                  classes.push('tag-' + v);
                } // else ignore e.g.  `highway=path + abandoned=railway`


                if (status) break;
              }
            }

            if (status) {
              classes.push('tag-status');
              classes.push('tag-status-' + status);
            } // add any secondary tags


            for (i = 0; i < secondaries.length; i++) {
              k = secondaries[i];
              v = t[k];
              if (!v || v === 'no' || k === primary) continue;
              classes.push('tag-' + k);
              classes.push('tag-' + k + '-' + v);
            } // For highways, look for surface tagging..


            if (primary === 'highway' && !osmPathHighwayTagValues[t.highway] || primary === 'aeroway') {
              var surface = t.highway === 'track' ? 'unpaved' : 'paved';

              for (k in t) {
                v = t[k];

                if (k in osmPavedTags) {
                  surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
                }

                if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
                  surface = 'semipaved';
                }
              }

              classes.push('tag-' + surface);
            } // If this is a wikidata-tagged item, add a class for that..


            var qid = t.wikidata || t['flag:wikidata'] || t['brand:wikidata'] || t['network:wikidata'] || t['operator:wikidata'];

            if (qid) {
              classes.push('tag-wikidata');
            }

            return classes.join(' ').trim();
          };

          tagClasses.tags = function (val) {
            if (!arguments.length) return _tags;
            _tags = val;
            return tagClasses;
          };

          return tagClasses;
        }

        // Patterns only work in Firefox when set directly on element.
        // (This is not a bug: https://bugzilla.mozilla.org/show_bug.cgi?id=750632)
        var patterns = {
          // tag - pattern name
          // -or-
          // tag - value - pattern name
          // -or-
          // tag - value - rules (optional tag-values, pattern name)
          // (matches earlier rules first, so fallback should be last entry)
          amenity: {
            grave_yard: 'cemetery',
            fountain: 'water_standing'
          },
          landuse: {
            cemetery: [{
              religion: 'christian',
              pattern: 'cemetery_christian'
            }, {
              religion: 'buddhist',
              pattern: 'cemetery_buddhist'
            }, {
              religion: 'muslim',
              pattern: 'cemetery_muslim'
            }, {
              religion: 'jewish',
              pattern: 'cemetery_jewish'
            }, {
              pattern: 'cemetery'
            }],
            construction: 'construction',
            farmland: 'farmland',
            farmyard: 'farmyard',
            forest: [{
              leaf_type: 'broadleaved',
              pattern: 'forest_broadleaved'
            }, {
              leaf_type: 'needleleaved',
              pattern: 'forest_needleleaved'
            }, {
              leaf_type: 'leafless',
              pattern: 'forest_leafless'
            }, {
              pattern: 'forest'
            } // same as 'leaf_type:mixed'
            ],
            grave_yard: 'cemetery',
            grass: [{
              golf: 'green',
              pattern: 'golf_green'
            }, {
              pattern: 'grass'
            }],
            landfill: 'landfill',
            meadow: 'meadow',
            military: 'construction',
            orchard: 'orchard',
            quarry: 'quarry',
            vineyard: 'vineyard'
          },
          natural: {
            beach: 'beach',
            grassland: 'grass',
            sand: 'beach',
            scrub: 'scrub',
            water: [{
              water: 'pond',
              pattern: 'pond'
            }, {
              water: 'reservoir',
              pattern: 'water_standing'
            }, {
              pattern: 'waves'
            }],
            wetland: [{
              wetland: 'marsh',
              pattern: 'wetland_marsh'
            }, {
              wetland: 'swamp',
              pattern: 'wetland_swamp'
            }, {
              wetland: 'bog',
              pattern: 'wetland_bog'
            }, {
              wetland: 'reedbed',
              pattern: 'wetland_reedbed'
            }, {
              pattern: 'wetland'
            }],
            wood: [{
              leaf_type: 'broadleaved',
              pattern: 'forest_broadleaved'
            }, {
              leaf_type: 'needleleaved',
              pattern: 'forest_needleleaved'
            }, {
              leaf_type: 'leafless',
              pattern: 'forest_leafless'
            }, {
              pattern: 'forest'
            } // same as 'leaf_type:mixed'
            ]
          },
          traffic_calming: {
            island: [{
              surface: 'grass',
              pattern: 'grass'
            }],
            chicane: [{
              surface: 'grass',
              pattern: 'grass'
            }],
            choker: [{
              surface: 'grass',
              pattern: 'grass'
            }]
          }
        };
        function svgTagPattern(tags) {
          // Skip pattern filling if this is a building (buildings don't get patterns applied)
          if (tags.building && tags.building !== 'no') {
            return null;
          }

          for (var tag in patterns) {
            var entityValue = tags[tag];
            if (!entityValue) continue;

            if (typeof patterns[tag] === 'string') {
              // extra short syntax (just tag) - pattern name
              return 'pattern-' + patterns[tag];
            } else {
              var values = patterns[tag];

              for (var value in values) {
                if (entityValue !== value) continue;
                var rules = values[value];

                if (typeof rules === 'string') {
                  // short syntax - pattern name
                  return 'pattern-' + rules;
                } // long syntax - rule array


                for (var ruleKey in rules) {
                  var rule = rules[ruleKey];
                  var pass = true;

                  for (var criterion in rule) {
                    if (criterion !== 'pattern') {
                      // reserved for pattern name
                      // The only rule is a required tag-value pair
                      var v = tags[criterion];

                      if (!v || v !== rule[criterion]) {
                        pass = false;
                        break;
                      }
                    }
                  }

                  if (pass) {
                    return 'pattern-' + rule.pattern;
                  }
                }
              }
            }
          }

          return null;
        }

        function svgAreas(projection, context) {
          function getPatternStyle(tags) {
            var imageID = svgTagPattern(tags);

            if (imageID) {
              return 'url("#ideditor-' + imageID + '")';
            }

            return '';
          }

          function drawTargets(selection, graph, entities, filter) {
            var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
            var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
            var getPath = svgPath(projection).geojson;
            var activeID = context.activeID();
            var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways

            var data = {
              targets: [],
              nopes: []
            };
            entities.forEach(function (way) {
              var features = svgSegmentWay(way, graph, activeID);
              data.targets.push.apply(data.targets, features.passive);
              data.nopes.push.apply(data.nopes, features.active);
            }); // Targets allow hover and vertex snapping

            var targetData = data.targets.filter(getPath);
            var targets = selection.selectAll('.area.target-allowed').filter(function (d) {
              return filter(d.properties.entity);
            }).data(targetData, function key(d) {
              return d.id;
            }); // exit

            targets.exit().remove();

            var segmentWasEdited = function segmentWasEdited(d) {
              var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes

              if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
                return false;
              }

              return d.properties.nodes.some(function (n) {
                return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
              });
            }; // enter/update


            targets.enter().append('path').merge(targets).attr('d', getPath).attr('class', function (d) {
              return 'way area target target-allowed ' + targetClass + d.id;
            }).classed('segment-edited', segmentWasEdited); // NOPE

            var nopeData = data.nopes.filter(getPath);
            var nopes = selection.selectAll('.area.target-nope').filter(function (d) {
              return filter(d.properties.entity);
            }).data(nopeData, function key(d) {
              return d.id;
            }); // exit

            nopes.exit().remove(); // enter/update

            nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
              return 'way area target target-nope ' + nopeClass + d.id;
            }).classed('segment-edited', segmentWasEdited);
          }

          function drawAreas(selection, graph, entities, filter) {
            var path = svgPath(projection, graph, true);
            var areas = {};
            var multipolygon;
            var base = context.history().base();

            for (var i = 0; i < entities.length; i++) {
              var entity = entities[i];
              if (entity.geometry(graph) !== 'area') continue;
              multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);

              if (multipolygon) {
                areas[multipolygon.id] = {
                  entity: multipolygon.mergeTags(entity.tags),
                  area: Math.abs(entity.area(graph))
                };
              } else if (!areas[entity.id]) {
                areas[entity.id] = {
                  entity: entity,
                  area: Math.abs(entity.area(graph))
                };
              }
            }

            var fills = Object.values(areas).filter(function hasPath(a) {
              return path(a.entity);
            });
            fills.sort(function areaSort(a, b) {
              return b.area - a.area;
            });
            fills = fills.map(function (a) {
              return a.entity;
            });
            var strokes = fills.filter(function (area) {
              return area.type === 'way';
            });
            var data = {
              clip: fills,
              shadow: strokes,
              stroke: strokes,
              fill: fills
            };
            var clipPaths = context.surface().selectAll('defs').selectAll('.clipPath-osm').filter(filter).data(data.clip, osmEntity.key);
            clipPaths.exit().remove();
            var clipPathsEnter = clipPaths.enter().append('clipPath').attr('class', 'clipPath-osm').attr('id', function (entity) {
              return 'ideditor-' + entity.id + '-clippath';
            });
            clipPathsEnter.append('path');
            clipPaths.merge(clipPathsEnter).selectAll('path').attr('d', path);
            var drawLayer = selection.selectAll('.layer-osm.areas');
            var touchLayer = selection.selectAll('.layer-touch.areas'); // Draw areas..

            var areagroup = drawLayer.selectAll('g.areagroup').data(['fill', 'shadow', 'stroke']);
            areagroup = areagroup.enter().append('g').attr('class', function (d) {
              return 'areagroup area-' + d;
            }).merge(areagroup);
            var paths = areagroup.selectAll('path').filter(filter).data(function (layer) {
              return data[layer];
            }, osmEntity.key);
            paths.exit().remove();
            var fillpaths = selection.selectAll('.area-fill path.area').nodes();
            var bisect = d3_bisector(function (node) {
              return -node.__data__.area(graph);
            }).left;

            function sortedByArea(entity) {
              if (this._parent.__data__ === 'fill') {
                return fillpaths[bisect(fillpaths, -entity.area(graph))];
              }
            }

            paths = paths.enter().insert('path', sortedByArea).merge(paths).each(function (entity) {
              var layer = this.parentNode.__data__;
              this.setAttribute('class', entity.type + ' area ' + layer + ' ' + entity.id);

              if (layer === 'fill') {
                this.setAttribute('clip-path', 'url(#ideditor-' + entity.id + '-clippath)');
                this.style.fill = this.style.stroke = getPatternStyle(entity.tags);
              }
            }).classed('added', function (d) {
              return !base.entities[d.id];
            }).classed('geometry-edited', function (d) {
              return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
            }).classed('retagged', function (d) {
              return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
            }).call(svgTagClasses()).attr('d', path); // Draw touch targets..

            touchLayer.call(drawTargets, graph, data.stroke, filter);
          }

          return drawAreas;
        }

        var fastJsonStableStringify = function fastJsonStableStringify(data, opts) {
          if (!opts) opts = {};
          if (typeof opts === 'function') opts = {
            cmp: opts
          };
          var cycles = typeof opts.cycles === 'boolean' ? opts.cycles : false;

          var cmp = opts.cmp && function (f) {
            return function (node) {
              return function (a, b) {
                var aobj = {
                  key: a,
                  value: node[a]
                };
                var bobj = {
                  key: b,
                  value: node[b]
                };
                return f(aobj, bobj);
              };
            };
          }(opts.cmp);

          var seen = [];
          return function stringify(node) {
            if (node && node.toJSON && typeof node.toJSON === 'function') {
              node = node.toJSON();
            }

            if (node === undefined) return;
            if (typeof node == 'number') return isFinite(node) ? '' + node : 'null';
            if (_typeof(node) !== 'object') return JSON.stringify(node);
            var i, out;

            if (Array.isArray(node)) {
              out = '[';

              for (i = 0; i < node.length; i++) {
                if (i) out += ',';
                out += stringify(node[i]) || 'null';
              }

              return out + ']';
            }

            if (node === null) return 'null';

            if (seen.indexOf(node) !== -1) {
              if (cycles) return JSON.stringify('__cycle__');
              throw new TypeError('Converting circular structure to JSON');
            }

            var seenIndex = seen.push(node) - 1;
            var keys = Object.keys(node).sort(cmp && cmp(node));
            out = '';

            for (i = 0; i < keys.length; i++) {
              var key = keys[i];
              var value = stringify(node[key]);
              if (!value) continue;
              if (out) out += ',';
              out += JSON.stringify(key) + ':' + value;
            }

            seen.splice(seenIndex, 1);
            return '{' + out + '}';
          }(data);
        };

        var $entries = objectToArray.entries;

        // `Object.entries` method
        // https://tc39.es/ecma262/#sec-object.entries
        _export({ target: 'Object', stat: true }, {
          entries: function entries(O) {
            return $entries(O);
          }
        });

        var _marked = /*#__PURE__*/regeneratorRuntime.mark(gpxGen),
            _marked3 = /*#__PURE__*/regeneratorRuntime.mark(kmlGen);

        // cast array x into numbers
        // get the content of a text node, if any
        function nodeVal(x) {
          if (x && x.normalize) {
            x.normalize();
          }

          return x && x.textContent || "";
        } // one Y child of X, if any, otherwise null


        function get1(x, y) {
          var n = x.getElementsByTagName(y);
          return n.length ? n[0] : null;
        }

        function getLineStyle(extensions) {
          var style = {};

          if (extensions) {
            var lineStyle = get1(extensions, "line");

            if (lineStyle) {
              var color = nodeVal(get1(lineStyle, "color")),
                  opacity = parseFloat(nodeVal(get1(lineStyle, "opacity"))),
                  width = parseFloat(nodeVal(get1(lineStyle, "width")));
              if (color) style.stroke = color;
              if (!isNaN(opacity)) style["stroke-opacity"] = opacity; // GPX width is in mm, convert to px with 96 px per inch

              if (!isNaN(width)) style["stroke-width"] = width * 96 / 25.4;
            }
          }

          return style;
        } // get the contents of multiple text nodes, if present


        function getMulti(x, ys) {
          var o = {};
          var n;
          var k;

          for (k = 0; k < ys.length; k++) {
            n = get1(x, ys[k]);
            if (n) o[ys[k]] = nodeVal(n);
          }

          return o;
        }

        function getProperties$1(node) {
          var prop = getMulti(node, ["name", "cmt", "desc", "type", "time", "keywords"]); // Parse additional data from our Garmin extension(s)

          var extensions = node.getElementsByTagNameNS("http://www.garmin.com/xmlschemas/GpxExtensions/v3", "*");

          for (var i = 0; i < extensions.length; i++) {
            var extension = extensions[i]; // Ignore nested extensions, like those on routepoints or trackpoints

            if (extension.parentNode.parentNode === node) {
              prop[extension.tagName.replace(":", "_")] = nodeVal(extension);
            }
          }

          var links = node.getElementsByTagName("link");
          if (links.length) prop.links = [];

          for (var _i = 0; _i < links.length; _i++) {
            prop.links.push(Object.assign({
              href: links[_i].getAttribute("href")
            }, getMulti(links[_i], ["text", "type"])));
          }

          return prop;
        }

        function coordPair$1(x) {
          var ll = [parseFloat(x.getAttribute("lon")), parseFloat(x.getAttribute("lat"))];
          var ele = get1(x, "ele"); // handle namespaced attribute in browser

          var heart = get1(x, "gpxtpx:hr") || get1(x, "hr");
          var time = get1(x, "time");
          var e;

          if (ele) {
            e = parseFloat(nodeVal(ele));

            if (!isNaN(e)) {
              ll.push(e);
            }
          }

          var result = {
            coordinates: ll,
            time: time ? nodeVal(time) : null,
            extendedValues: []
          };

          if (heart) {
            result.extendedValues.push(["heart", parseFloat(nodeVal(heart))]);
          }

          var extensions = get1(x, "extensions");

          if (extensions !== null) {
            for (var _i2 = 0, _arr = ["speed", "course", "hAcc", "vAcc"]; _i2 < _arr.length; _i2++) {
              var name = _arr[_i2];
              var v = parseFloat(nodeVal(get1(extensions, name)));

              if (!isNaN(v)) {
                result.extendedValues.push([name, v]);
              }
            }
          }

          return result;
        }

        function getRoute(node) {
          var line = getPoints$1(node, "rtept");
          if (!line) return;
          return {
            type: "Feature",
            properties: Object.assign(getProperties$1(node), getLineStyle(get1(node, "extensions")), {
              _gpxType: "rte"
            }),
            geometry: {
              type: "LineString",
              coordinates: line.line
            }
          };
        }

        function getPoints$1(node, pointname) {
          var pts = node.getElementsByTagName(pointname);
          if (pts.length < 2) return; // Invalid line in GeoJSON

          var line = [];
          var times = [];
          var extendedValues = {};

          for (var i = 0; i < pts.length; i++) {
            var c = coordPair$1(pts[i]);
            line.push(c.coordinates);
            if (c.time) times.push(c.time);

            for (var j = 0; j < c.extendedValues.length; j++) {
              var _c$extendedValues$j = _slicedToArray(c.extendedValues[j], 2),
                  name = _c$extendedValues$j[0],
                  val = _c$extendedValues$j[1];

              var plural = name === "heart" ? name : name + "s";

              if (!extendedValues[plural]) {
                extendedValues[plural] = Array(pts.length).fill(null);
              }

              extendedValues[plural][i] = val;
            }
          }

          return {
            line: line,
            times: times,
            extendedValues: extendedValues
          };
        }

        function getTrack(node) {
          var segments = node.getElementsByTagName("trkseg");
          var track = [];
          var times = [];
          var extractedLines = [];

          for (var i = 0; i < segments.length; i++) {
            var line = getPoints$1(segments[i], "trkpt");

            if (line) {
              extractedLines.push(line);
              if (line.times && line.times.length) times.push(line.times);
            }
          }

          if (extractedLines.length === 0) return;
          var multi = extractedLines.length > 1;
          var properties = Object.assign(getProperties$1(node), getLineStyle(get1(node, "extensions")), {
            _gpxType: "trk"
          }, times.length ? {
            coordinateProperties: {
              times: multi ? times : times[0]
            }
          } : {});

          for (var _i3 = 0; _i3 < extractedLines.length; _i3++) {
            var _line = extractedLines[_i3];
            track.push(_line.line);

            for (var _i4 = 0, _Object$entries = Object.entries(_line.extendedValues); _i4 < _Object$entries.length; _i4++) {
              var _Object$entries$_i = _slicedToArray(_Object$entries[_i4], 2),
                  name = _Object$entries$_i[0],
                  val = _Object$entries$_i[1];

              var props = properties;

              if (name === "heart") {
                if (!properties.coordinateProperties) {
                  properties.coordinateProperties = {};
                }

                props = properties.coordinateProperties;
              }

              if (multi) {
                if (!props[name]) props[name] = extractedLines.map(function (line) {
                  return new Array(line.line.length).fill(null);
                });
                props[name][_i3] = val;
              } else {
                props[name] = val;
              }
            }
          }

          return {
            type: "Feature",
            properties: properties,
            geometry: multi ? {
              type: "MultiLineString",
              coordinates: track
            } : {
              type: "LineString",
              coordinates: track[0]
            }
          };
        }

        function getPoint(node) {
          return {
            type: "Feature",
            properties: Object.assign(getProperties$1(node), getMulti(node, ["sym"])),
            geometry: {
              type: "Point",
              coordinates: coordPair$1(node).coordinates
            }
          };
        }

        function gpxGen(doc) {
          var tracks, routes, waypoints, i, feature, _i5, _feature, _i6;

          return regeneratorRuntime.wrap(function gpxGen$(_context) {
            while (1) {
              switch (_context.prev = _context.next) {
                case 0:
                  tracks = doc.getElementsByTagName("trk");
                  routes = doc.getElementsByTagName("rte");
                  waypoints = doc.getElementsByTagName("wpt");
                  i = 0;

                case 4:
                  if (!(i < tracks.length)) {
                    _context.next = 12;
                    break;
                  }

                  feature = getTrack(tracks[i]);

                  if (!feature) {
                    _context.next = 9;
                    break;
                  }

                  _context.next = 9;
                  return feature;

                case 9:
                  i++;
                  _context.next = 4;
                  break;

                case 12:
                  _i5 = 0;

                case 13:
                  if (!(_i5 < routes.length)) {
                    _context.next = 21;
                    break;
                  }

                  _feature = getRoute(routes[_i5]);

                  if (!_feature) {
                    _context.next = 18;
                    break;
                  }

                  _context.next = 18;
                  return _feature;

                case 18:
                  _i5++;
                  _context.next = 13;
                  break;

                case 21:
                  _i6 = 0;

                case 22:
                  if (!(_i6 < waypoints.length)) {
                    _context.next = 28;
                    break;
                  }

                  _context.next = 25;
                  return getPoint(waypoints[_i6]);

                case 25:
                  _i6++;
                  _context.next = 22;
                  break;

                case 28:
                case "end":
                  return _context.stop();
              }
            }
          }, _marked);
        }

        function gpx(doc) {
          return {
            type: "FeatureCollection",
            features: Array.from(gpxGen(doc))
          };
        }

        var removeSpace = /\s*/g;
        var trimSpace = /^\s*|\s*$/g;
        var splitSpace = /\s+/; // generate a short, numeric hash of a string

        function okhash(x) {
          if (!x || !x.length) return 0;
          var h = 0;

          for (var i = 0; i < x.length; i++) {
            h = (h << 5) - h + x.charCodeAt(i) | 0;
          }

          return h;
        } // get one coordinate from a coordinate array, if any


        function coord1(v) {
          return v.replace(removeSpace, "").split(",").map(parseFloat);
        } // get all coordinates from a coordinate array as [[],[]]


        function coord(v) {
          return v.replace(trimSpace, "").split(splitSpace).map(coord1);
        }

        function xml2str(node) {
          if (node.xml !== undefined) return node.xml;

          if (node.tagName) {
            var output = node.tagName;

            for (var i = 0; i < node.attributes.length; i++) {
              output += node.attributes[i].name + node.attributes[i].value;
            }

            for (var _i9 = 0; _i9 < node.childNodes.length; _i9++) {
              output += xml2str(node.childNodes[_i9]);
            }

            return output;
          }

          if (node.nodeName === "#text") {
            return (node.nodeValue || node.value || "").trim();
          }

          if (node.nodeName === "#cdata-section") {
            return node.nodeValue;
          }

          return "";
        }

        var geotypes = ["Polygon", "LineString", "Point", "Track", "gx:Track"];

        function kmlColor(properties, elem, prefix) {
          var v = nodeVal(get1(elem, "color")) || "";
          var colorProp = prefix == "stroke" || prefix === "fill" ? prefix : prefix + "-color";

          if (v.substr(0, 1) === "#") {
            v = v.substr(1);
          }

          if (v.length === 6 || v.length === 3) {
            properties[colorProp] = v;
          } else if (v.length === 8) {
            properties[prefix + "-opacity"] = parseInt(v.substr(0, 2), 16) / 255;
            properties[colorProp] = "#" + v.substr(6, 2) + v.substr(4, 2) + v.substr(2, 2);
          }
        }

        function numericProperty(properties, elem, source, target) {
          var val = parseFloat(nodeVal(get1(elem, source)));
          if (!isNaN(val)) properties[target] = val;
        }

        function gxCoords(root) {
          var elems = root.getElementsByTagName("coord");
          var coords = [];
          var times = [];
          if (elems.length === 0) elems = root.getElementsByTagName("gx:coord");

          for (var i = 0; i < elems.length; i++) {
            coords.push(nodeVal(elems[i]).split(" ").map(parseFloat));
          }

          var timeElems = root.getElementsByTagName("when");

          for (var j = 0; j < timeElems.length; j++) {
            times.push(nodeVal(timeElems[j]));
          }

          return {
            coords: coords,
            times: times
          };
        }

        function getGeometry(root) {
          var geomNode;
          var geomNodes;
          var i;
          var j;
          var k;
          var geoms = [];
          var coordTimes = [];

          if (get1(root, "MultiGeometry")) {
            return getGeometry(get1(root, "MultiGeometry"));
          }

          if (get1(root, "MultiTrack")) {
            return getGeometry(get1(root, "MultiTrack"));
          }

          if (get1(root, "gx:MultiTrack")) {
            return getGeometry(get1(root, "gx:MultiTrack"));
          }

          for (i = 0; i < geotypes.length; i++) {
            geomNodes = root.getElementsByTagName(geotypes[i]);

            if (geomNodes) {
              for (j = 0; j < geomNodes.length; j++) {
                geomNode = geomNodes[j];

                if (geotypes[i] === "Point") {
                  geoms.push({
                    type: "Point",
                    coordinates: coord1(nodeVal(get1(geomNode, "coordinates")))
                  });
                } else if (geotypes[i] === "LineString") {
                  geoms.push({
                    type: "LineString",
                    coordinates: coord(nodeVal(get1(geomNode, "coordinates")))
                  });
                } else if (geotypes[i] === "Polygon") {
                  var rings = geomNode.getElementsByTagName("LinearRing"),
                      coords = [];

                  for (k = 0; k < rings.length; k++) {
                    coords.push(coord(nodeVal(get1(rings[k], "coordinates"))));
                  }

                  geoms.push({
                    type: "Polygon",
                    coordinates: coords
                  });
                } else if (geotypes[i] === "Track" || geotypes[i] === "gx:Track") {
                  var track = gxCoords(geomNode);
                  geoms.push({
                    type: "LineString",
                    coordinates: track.coords
                  });
                  if (track.times.length) coordTimes.push(track.times);
                }
              }
            }
          }

          return {
            geoms: geoms,
            coordTimes: coordTimes
          };
        }

        function getPlacemark(root, styleIndex, styleMapIndex, styleByHash) {
          var geomsAndTimes = getGeometry(root);
          var i;
          var properties = {};
          var name = nodeVal(get1(root, "name"));
          var address = nodeVal(get1(root, "address"));
          var styleUrl = nodeVal(get1(root, "styleUrl"));
          var description = nodeVal(get1(root, "description"));
          var timeSpan = get1(root, "TimeSpan");
          var timeStamp = get1(root, "TimeStamp");
          var extendedData = get1(root, "ExtendedData");
          var iconStyle = get1(root, "IconStyle");
          var labelStyle = get1(root, "LabelStyle");
          var lineStyle = get1(root, "LineStyle");
          var polyStyle = get1(root, "PolyStyle");
          var visibility = get1(root, "visibility");
          if (name) properties.name = name;
          if (address) properties.address = address;

          if (styleUrl) {
            if (styleUrl[0] !== "#") {
              styleUrl = "#" + styleUrl;
            }

            properties.styleUrl = styleUrl;

            if (styleIndex[styleUrl]) {
              properties.styleHash = styleIndex[styleUrl];
            }

            if (styleMapIndex[styleUrl]) {
              properties.styleMapHash = styleMapIndex[styleUrl];
              properties.styleHash = styleIndex[styleMapIndex[styleUrl].normal];
            } // Try to populate the lineStyle or polyStyle since we got the style hash


            var style = styleByHash[properties.styleHash];

            if (style) {
              if (!iconStyle) iconStyle = get1(style, "IconStyle");
              if (!labelStyle) labelStyle = get1(style, "LabelStyle");
              if (!lineStyle) lineStyle = get1(style, "LineStyle");
              if (!polyStyle) polyStyle = get1(style, "PolyStyle");
            }
          }

          if (description) properties.description = description;

          if (timeSpan) {
            var begin = nodeVal(get1(timeSpan, "begin"));
            var end = nodeVal(get1(timeSpan, "end"));
            properties.timespan = {
              begin: begin,
              end: end
            };
          }

          if (timeStamp) {
            properties.timestamp = nodeVal(get1(timeStamp, "when"));
          }

          if (iconStyle) {
            kmlColor(properties, iconStyle, "icon");
            numericProperty(properties, iconStyle, "scale", "icon-scale");
            numericProperty(properties, iconStyle, "heading", "icon-heading");
            var hotspot = get1(iconStyle, "hotSpot");

            if (hotspot) {
              var left = parseFloat(hotspot.getAttribute("x"));
              var top = parseFloat(hotspot.getAttribute("y"));
              if (!isNaN(left) && !isNaN(top)) properties["icon-offset"] = [left, top];
            }

            var icon = get1(iconStyle, "Icon");

            if (icon) {
              var href = nodeVal(get1(icon, "href"));
              if (href) properties.icon = href;
            }
          }

          if (labelStyle) {
            kmlColor(properties, labelStyle, "label");
            numericProperty(properties, labelStyle, "scale", "label-scale");
          }

          if (lineStyle) {
            kmlColor(properties, lineStyle, "stroke");
            numericProperty(properties, lineStyle, "width", "stroke-width");
          }

          if (polyStyle) {
            kmlColor(properties, polyStyle, "fill");
            var fill = nodeVal(get1(polyStyle, "fill"));
            var outline = nodeVal(get1(polyStyle, "outline"));
            if (fill) properties["fill-opacity"] = fill === "1" ? properties["fill-opacity"] || 1 : 0;
            if (outline) properties["stroke-opacity"] = outline === "1" ? properties["stroke-opacity"] || 1 : 0;
          }

          if (extendedData) {
            var datas = extendedData.getElementsByTagName("Data"),
                simpleDatas = extendedData.getElementsByTagName("SimpleData");

            for (i = 0; i < datas.length; i++) {
              properties[datas[i].getAttribute("name")] = nodeVal(get1(datas[i], "value"));
            }

            for (i = 0; i < simpleDatas.length; i++) {
              properties[simpleDatas[i].getAttribute("name")] = nodeVal(simpleDatas[i]);
            }
          }

          if (visibility) {
            properties.visibility = nodeVal(visibility);
          }

          if (geomsAndTimes.coordTimes.length) {
            properties.coordinateProperties = {
              times: geomsAndTimes.coordTimes.length === 1 ? geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes
            };
          }

          var feature = {
            type: "Feature",
            geometry: geomsAndTimes.geoms.length === 0 ? null : geomsAndTimes.geoms.length === 1 ? geomsAndTimes.geoms[0] : {
              type: "GeometryCollection",
              geometries: geomsAndTimes.geoms
            },
            properties: properties
          };
          if (root.getAttribute("id")) feature.id = root.getAttribute("id");
          return feature;
        }

        function kmlGen(doc) {
          var styleIndex, styleByHash, styleMapIndex, placemarks, styles, styleMaps, k, hash, l, pairs, pairsMap, m, j, feature;
          return regeneratorRuntime.wrap(function kmlGen$(_context3) {
            while (1) {
              switch (_context3.prev = _context3.next) {
                case 0:
                  // styleindex keeps track of hashed styles in order to match feature
                  styleIndex = {};
                  styleByHash = {}; // stylemapindex keeps track of style maps to expose in properties

                  styleMapIndex = {}; // atomic geospatial types supported by KML - MultiGeometry is
                  // handled separately
                  // all root placemarks in the file

                  placemarks = doc.getElementsByTagName("Placemark");
                  styles = doc.getElementsByTagName("Style");
                  styleMaps = doc.getElementsByTagName("StyleMap");

                  for (k = 0; k < styles.length; k++) {
                    hash = okhash(xml2str(styles[k])).toString(16);
                    styleIndex["#" + styles[k].getAttribute("id")] = hash;
                    styleByHash[hash] = styles[k];
                  }

                  for (l = 0; l < styleMaps.length; l++) {
                    styleIndex["#" + styleMaps[l].getAttribute("id")] = okhash(xml2str(styleMaps[l])).toString(16);
                    pairs = styleMaps[l].getElementsByTagName("Pair");
                    pairsMap = {};

                    for (m = 0; m < pairs.length; m++) {
                      pairsMap[nodeVal(get1(pairs[m], "key"))] = nodeVal(get1(pairs[m], "styleUrl"));
                    }

                    styleMapIndex["#" + styleMaps[l].getAttribute("id")] = pairsMap;
                  }

                  j = 0;

                case 9:
                  if (!(j < placemarks.length)) {
                    _context3.next = 17;
                    break;
                  }

                  feature = getPlacemark(placemarks[j], styleIndex, styleMapIndex, styleByHash);

                  if (!feature) {
                    _context3.next = 14;
                    break;
                  }

                  _context3.next = 14;
                  return feature;

                case 14:
                  j++;
                  _context3.next = 9;
                  break;

                case 17:
                case "end":
                  return _context3.stop();
              }
            }
          }, _marked3);
        }

        function kml(doc) {
          return {
            type: "FeatureCollection",
            features: Array.from(kmlGen(doc))
          };
        }

        var _initialized = false;
        var _enabled = false;

        var _geojson;

        function svgData(projection, context, dispatch) {
          var throttledRedraw = throttle(function () {
            dispatch.call('change');
          }, 1000);

          var _showLabels = true;
          var detected = utilDetect();
          var layer = select(null);

          var _vtService;

          var _fileList;

          var _template;

          var _src;

          function init() {
            if (_initialized) return; // run once

            _geojson = {};
            _enabled = true;

            function over(d3_event) {
              d3_event.stopPropagation();
              d3_event.preventDefault();
              d3_event.dataTransfer.dropEffect = 'copy';
            }

            context.container().attr('dropzone', 'copy').on('drop.svgData', function (d3_event) {
              d3_event.stopPropagation();
              d3_event.preventDefault();
              if (!detected.filedrop) return;
              drawData.fileList(d3_event.dataTransfer.files);
            }).on('dragenter.svgData', over).on('dragexit.svgData', over).on('dragover.svgData', over);
            _initialized = true;
          }

          function getService() {
            if (services.vectorTile && !_vtService) {
              _vtService = services.vectorTile;

              _vtService.event.on('loadedData', throttledRedraw);
            } else if (!services.vectorTile && _vtService) {
              _vtService = null;
            }

            return _vtService;
          }

          function showLayer() {
            layerOn();
            layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
              dispatch.call('change');
            });
          }

          function hideLayer() {
            throttledRedraw.cancel();
            layer.transition().duration(250).style('opacity', 0).on('end', layerOff);
          }

          function layerOn() {
            layer.style('display', 'block');
          }

          function layerOff() {
            layer.selectAll('.viewfield-group').remove();
            layer.style('display', 'none');
          } // ensure that all geojson features in a collection have IDs


          function ensureIDs(gj) {
            if (!gj) return null;

            if (gj.type === 'FeatureCollection') {
              for (var i = 0; i < gj.features.length; i++) {
                ensureFeatureID(gj.features[i]);
              }
            } else {
              ensureFeatureID(gj);
            }

            return gj;
          } // ensure that each single Feature object has a unique ID


          function ensureFeatureID(feature) {
            if (!feature) return;
            feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
            return feature;
          } // Prefer an array of Features instead of a FeatureCollection


          function getFeatures(gj) {
            if (!gj) return [];

            if (gj.type === 'FeatureCollection') {
              return gj.features;
            } else {
              return [gj];
            }
          }

          function featureKey(d) {
            return d.__featurehash__;
          }

          function isPolygon(d) {
            return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
          }

          function clipPathID(d) {
            return 'ideditor-data-' + d.__featurehash__ + '-clippath';
          }

          function featureClasses(d) {
            return ['data' + d.__featurehash__, d.geometry.type, isPolygon(d) ? 'area' : '', d.__layerID__ || ''].filter(Boolean).join(' ');
          }

          function drawData(selection) {
            var vtService = getService();
            var getPath = svgPath(projection).geojson;
            var getAreaPath = svgPath(projection, null, true).geojson;
            var hasData = drawData.hasData();
            layer = selection.selectAll('.layer-mapdata').data(_enabled && hasData ? [0] : []);
            layer.exit().remove();
            layer = layer.enter().append('g').attr('class', 'layer-mapdata').merge(layer);
            var surface = context.surface();
            if (!surface || surface.empty()) return; // not ready to draw yet, starting up
            // Gather data

            var geoData, polygonData;

            if (_template && vtService) {
              // fetch data from vector tile service
              var sourceID = _template;
              vtService.loadTiles(sourceID, _template, projection);
              geoData = vtService.data(sourceID, projection);
            } else {
              geoData = getFeatures(_geojson);
            }

            geoData = geoData.filter(getPath);
            polygonData = geoData.filter(isPolygon); // Draw clip paths for polygons

            var clipPaths = surface.selectAll('defs').selectAll('.clipPath-data').data(polygonData, featureKey);
            clipPaths.exit().remove();
            var clipPathsEnter = clipPaths.enter().append('clipPath').attr('class', 'clipPath-data').attr('id', clipPathID);
            clipPathsEnter.append('path');
            clipPaths.merge(clipPathsEnter).selectAll('path').attr('d', getAreaPath); // Draw fill, shadow, stroke layers

            var datagroups = layer.selectAll('g.datagroup').data(['fill', 'shadow', 'stroke']);
            datagroups = datagroups.enter().append('g').attr('class', function (d) {
              return 'datagroup datagroup-' + d;
            }).merge(datagroups); // Draw paths

            var pathData = {
              fill: polygonData,
              shadow: geoData,
              stroke: geoData
            };
            var paths = datagroups.selectAll('path').data(function (layer) {
              return pathData[layer];
            }, featureKey); // exit

            paths.exit().remove(); // enter/update

            paths = paths.enter().append('path').attr('class', function (d) {
              var datagroup = this.parentNode.__data__;
              return 'pathdata ' + datagroup + ' ' + featureClasses(d);
            }).attr('clip-path', function (d) {
              var datagroup = this.parentNode.__data__;
              return datagroup === 'fill' ? 'url(#' + clipPathID(d) + ')' : null;
            }).merge(paths).attr('d', function (d) {
              var datagroup = this.parentNode.__data__;
              return datagroup === 'fill' ? getAreaPath(d) : getPath(d);
            }); // Draw labels

            layer.call(drawLabels, 'label-halo', geoData).call(drawLabels, 'label', geoData);

            function drawLabels(selection, textClass, data) {
              var labelPath = d3_geoPath(projection);
              var labelData = data.filter(function (d) {
                return _showLabels && d.properties && (d.properties.desc || d.properties.name);
              });
              var labels = selection.selectAll('text.' + textClass).data(labelData, featureKey); // exit

              labels.exit().remove(); // enter/update

              labels = labels.enter().append('text').attr('class', function (d) {
                return textClass + ' ' + featureClasses(d);
              }).merge(labels).text(function (d) {
                return d.properties.desc || d.properties.name;
              }).attr('x', function (d) {
                var centroid = labelPath.centroid(d);
                return centroid[0] + 11;
              }).attr('y', function (d) {
                var centroid = labelPath.centroid(d);
                return centroid[1];
              });
            }
          }

          function getExtension(fileName) {
            if (!fileName) return;
            var re = /\.(gpx|kml|(geo)?json)$/i;
            var match = fileName.toLowerCase().match(re);
            return match && match.length && match[0];
          }

          function xmlToDom(textdata) {
            return new DOMParser().parseFromString(textdata, 'text/xml');
          }

          drawData.setFile = function (extension, data) {
            _template = null;
            _fileList = null;
            _geojson = null;
            _src = null;
            var gj;

            switch (extension) {
              case '.gpx':
                gj = gpx(xmlToDom(data));
                break;

              case '.kml':
                gj = kml(xmlToDom(data));
                break;

              case '.geojson':
              case '.json':
                gj = JSON.parse(data);
                break;
            }

            gj = gj || {};

            if (Object.keys(gj).length) {
              _geojson = ensureIDs(gj);
              _src = extension + ' data file';
              this.fitZoom();
            }

            dispatch.call('change');
            return this;
          };

          drawData.showLabels = function (val) {
            if (!arguments.length) return _showLabels;
            _showLabels = val;
            return this;
          };

          drawData.enabled = function (val) {
            if (!arguments.length) return _enabled;
            _enabled = val;

            if (_enabled) {
              showLayer();
            } else {
              hideLayer();
            }

            dispatch.call('change');
            return this;
          };

          drawData.hasData = function () {
            var gj = _geojson || {};
            return !!(_template || Object.keys(gj).length);
          };

          drawData.template = function (val, src) {
            if (!arguments.length) return _template; // test source against OSM imagery blocklists..

            var osm = context.connection();

            if (osm) {
              var blocklists = osm.imageryBlocklists();
              var fail = false;
              var tested = 0;
              var regex;

              for (var i = 0; i < blocklists.length; i++) {
                regex = blocklists[i];
                fail = regex.test(val);
                tested++;
                if (fail) break;
              } // ensure at least one test was run.


              if (!tested) {
                regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
                fail = regex.test(val);
              }
            }

            _template = val;
            _fileList = null;
            _geojson = null; // strip off the querystring/hash from the template,
            // it often includes the access token

            _src = src || 'vectortile:' + val.split(/[?#]/)[0];
            dispatch.call('change');
            return this;
          };

          drawData.geojson = function (gj, src) {
            if (!arguments.length) return _geojson;
            _template = null;
            _fileList = null;
            _geojson = null;
            _src = null;
            gj = gj || {};

            if (Object.keys(gj).length) {
              _geojson = ensureIDs(gj);
              _src = src || 'unknown.geojson';
            }

            dispatch.call('change');
            return this;
          };

          drawData.fileList = function (fileList) {
            if (!arguments.length) return _fileList;
            _template = null;
            _fileList = fileList;
            _geojson = null;
            _src = null;
            if (!fileList || !fileList.length) return this;
            var f = fileList[0];
            var extension = getExtension(f.name);
            var reader = new FileReader();

            reader.onload = function () {
              return function (e) {
                drawData.setFile(extension, e.target.result);
              };
            }();

            reader.readAsText(f);
            return this;
          };

          drawData.url = function (url, defaultExtension) {
            _template = null;
            _fileList = null;
            _geojson = null;
            _src = null; // strip off any querystring/hash from the url before checking extension

            var testUrl = url.split(/[?#]/)[0];
            var extension = getExtension(testUrl) || defaultExtension;

            if (extension) {
              _template = null;
              d3_text(url).then(function (data) {
                drawData.setFile(extension, data);
              })["catch"](function () {
                /* ignore */
              });
            } else {
              drawData.template(url);
            }

            return this;
          };

          drawData.getSrc = function () {
            return _src || '';
          };

          drawData.fitZoom = function () {
            var features = getFeatures(_geojson);
            if (!features.length) return;
            var map = context.map();
            var viewport = map.trimmedExtent().polygon();
            var coords = features.reduce(function (coords, feature) {
              var geom = feature.geometry;
              if (!geom) return coords;
              var c = geom.coordinates;
              /* eslint-disable no-fallthrough */

              switch (geom.type) {
                case 'Point':
                  c = [c];

                case 'MultiPoint':
                case 'LineString':
                  break;

                case 'MultiPolygon':
                  c = utilArrayFlatten(c);

                case 'Polygon':
                case 'MultiLineString':
                  c = utilArrayFlatten(c);
                  break;
              }
              /* eslint-enable no-fallthrough */


              return utilArrayUnion(coords, c);
            }, []);

            if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
              var extent = geoExtent(d3_geoBounds({
                type: 'LineString',
                coordinates: coords
              }));
              map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
            }

            return this;
          };

          init();
          return drawData;
        }

        function svgDebug(projection, context) {
          function drawDebug(selection) {
            var showTile = context.getDebug('tile');
            var showCollision = context.getDebug('collision');
            var showImagery = context.getDebug('imagery');
            var showTouchTargets = context.getDebug('target');
            var showDownloaded = context.getDebug('downloaded');
            var debugData = [];

            if (showTile) {
              debugData.push({
                "class": 'red',
                label: 'tile'
              });
            }

            if (showCollision) {
              debugData.push({
                "class": 'yellow',
                label: 'collision'
              });
            }

            if (showImagery) {
              debugData.push({
                "class": 'orange',
                label: 'imagery'
              });
            }

            if (showTouchTargets) {
              debugData.push({
                "class": 'pink',
                label: 'touchTargets'
              });
            }

            if (showDownloaded) {
              debugData.push({
                "class": 'purple',
                label: 'downloaded'
              });
            }

            var legend = context.container().select('.main-content').selectAll('.debug-legend').data(debugData.length ? [0] : []);
            legend.exit().remove();
            legend = legend.enter().append('div').attr('class', 'fillD debug-legend').merge(legend);
            var legendItems = legend.selectAll('.debug-legend-item').data(debugData, function (d) {
              return d.label;
            });
            legendItems.exit().remove();
            legendItems.enter().append('span').attr('class', function (d) {
              return "debug-legend-item ".concat(d["class"]);
            }).text(function (d) {
              return d.label;
            });
            var layer = selection.selectAll('.layer-debug').data(showImagery || showDownloaded ? [0] : []);
            layer.exit().remove();
            layer = layer.enter().append('g').attr('class', 'layer-debug').merge(layer); // imagery

            var extent = context.map().extent();
            _mainFileFetcher.get('imagery').then(function (d) {
              var hits = showImagery && d.query.bbox(extent.rectangle(), true) || [];
              var features = hits.map(function (d) {
                return d.features[d.id];
              });
              var imagery = layer.selectAll('path.debug-imagery').data(features);
              imagery.exit().remove();
              imagery.enter().append('path').attr('class', 'debug-imagery debug orange');
            })["catch"](function () {
              /* ignore */
            }); // downloaded

            var osm = context.connection();
            var dataDownloaded = [];

            if (osm && showDownloaded) {
              var rtree = osm.caches('get').tile.rtree;
              dataDownloaded = rtree.all().map(function (bbox) {
                return {
                  type: 'Feature',
                  properties: {
                    id: bbox.id
                  },
                  geometry: {
                    type: 'Polygon',
                    coordinates: [[[bbox.minX, bbox.minY], [bbox.minX, bbox.maxY], [bbox.maxX, bbox.maxY], [bbox.maxX, bbox.minY], [bbox.minX, bbox.minY]]]
                  }
                };
              });
            }

            var downloaded = layer.selectAll('path.debug-downloaded').data(showDownloaded ? dataDownloaded : []);
            downloaded.exit().remove();
            downloaded.enter().append('path').attr('class', 'debug-downloaded debug purple'); // update

            layer.selectAll('path').attr('d', svgPath(projection).geojson);
          } // This looks strange because `enabled` methods on other layers are
          // chainable getter/setters, and this one is just a getter.


          drawDebug.enabled = function () {
            if (!arguments.length) {
              return context.getDebug('tile') || context.getDebug('collision') || context.getDebug('imagery') || context.getDebug('target') || context.getDebug('downloaded');
            } else {
              return this;
            }
          };

          return drawDebug;
        }

        /*
            A standalone SVG element that contains only a `defs` sub-element. To be
            used once globally, since defs IDs must be unique within a document.
        */

        function svgDefs(context) {
          var _defsSelection = select(null);

          var _spritesheetIds = ['iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'community-sprite'];

          function drawDefs(selection) {
            _defsSelection = selection.append('defs'); // add markers

            _defsSelection.append('marker').attr('id', 'ideditor-oneway-marker').attr('viewBox', '0 0 10 5').attr('refX', 2.5).attr('refY', 2.5).attr('markerWidth', 2).attr('markerHeight', 2).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'oneway-marker-path').attr('d', 'M 5,3 L 0,3 L 0,2 L 5,2 L 5,0 L 10,2.5 L 5,5 z').attr('stroke', 'none').attr('fill', '#000').attr('opacity', '0.75'); // SVG markers have to be given a colour where they're defined
            // (they can't inherit it from the line they're attached to),
            // so we need to manually define markers for each color of tag
            // (also, it's slightly nicer if we can control the
            // positioning for different tags)


            function addSidedMarker(name, color, offset) {
              _defsSelection.append('marker').attr('id', 'ideditor-sided-marker-' + name).attr('viewBox', '0 0 2 2').attr('refX', 1).attr('refY', -offset).attr('markerWidth', 1.5).attr('markerHeight', 1.5).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'sided-marker-path sided-marker-' + name + '-path').attr('d', 'M 0,0 L 1,1 L 2,0 z').attr('stroke', 'none').attr('fill', color);
            }

            addSidedMarker('natural', 'rgb(170, 170, 170)', 0); // for a coastline, the arrows are (somewhat unintuitively) on
            // the water side, so let's color them blue (with a gap) to
            // give a stronger indication

            addSidedMarker('coastline', '#77dede', 1);
            addSidedMarker('waterway', '#77dede', 1); // barriers have a dashed line, and separating the triangle
            // from the line visually suits that

            addSidedMarker('barrier', '#ddd', 1);
            addSidedMarker('man_made', '#fff', 0);

            _defsSelection.append('marker').attr('id', 'ideditor-viewfield-marker').attr('viewBox', '0 0 16 16').attr('refX', 8).attr('refY', 16).attr('markerWidth', 4).attr('markerHeight', 4).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'viewfield-marker-path').attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z').attr('fill', '#333').attr('fill-opacity', '0.75').attr('stroke', '#fff').attr('stroke-width', '0.5px').attr('stroke-opacity', '0.75');

            _defsSelection.append('marker').attr('id', 'ideditor-viewfield-marker-wireframe').attr('viewBox', '0 0 16 16').attr('refX', 8).attr('refY', 16).attr('markerWidth', 4).attr('markerHeight', 4).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'viewfield-marker-path').attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z').attr('fill', 'none').attr('stroke', '#fff').attr('stroke-width', '0.5px').attr('stroke-opacity', '0.75'); // add patterns


            var patterns = _defsSelection.selectAll('pattern').data([// pattern name, pattern image name
            ['beach', 'dots'], ['construction', 'construction'], ['cemetery', 'cemetery'], ['cemetery_christian', 'cemetery_christian'], ['cemetery_buddhist', 'cemetery_buddhist'], ['cemetery_muslim', 'cemetery_muslim'], ['cemetery_jewish', 'cemetery_jewish'], ['farmland', 'farmland'], ['farmyard', 'farmyard'], ['forest', 'forest'], ['forest_broadleaved', 'forest_broadleaved'], ['forest_needleleaved', 'forest_needleleaved'], ['forest_leafless', 'forest_leafless'], ['golf_green', 'grass'], ['grass', 'grass'], ['landfill', 'landfill'], ['meadow', 'grass'], ['orchard', 'orchard'], ['pond', 'pond'], ['quarry', 'quarry'], ['scrub', 'bushes'], ['vineyard', 'vineyard'], ['water_standing', 'lines'], ['waves', 'waves'], ['wetland', 'wetland'], ['wetland_marsh', 'wetland_marsh'], ['wetland_swamp', 'wetland_swamp'], ['wetland_bog', 'wetland_bog'], ['wetland_reedbed', 'wetland_reedbed']]).enter().append('pattern').attr('id', function (d) {
              return 'ideditor-pattern-' + d[0];
            }).attr('width', 32).attr('height', 32).attr('patternUnits', 'userSpaceOnUse');

            patterns.append('rect').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('class', function (d) {
              return 'pattern-color-' + d[0];
            });
            patterns.append('image').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('xlink:href', function (d) {
              return context.imagePath('pattern/' + d[1] + '.png');
            }); // add clip paths

            _defsSelection.selectAll('clipPath').data([12, 18, 20, 32, 45]).enter().append('clipPath').attr('id', function (d) {
              return 'ideditor-clip-square-' + d;
            }).append('rect').attr('x', 0).attr('y', 0).attr('width', function (d) {
              return d;
            }).attr('height', function (d) {
              return d;
            }); // add symbol spritesheets


            addSprites(_spritesheetIds, true);
          }

          function addSprites(ids, overrideColors) {
            _spritesheetIds = utilArrayUniq(_spritesheetIds.concat(ids));

            var spritesheets = _defsSelection.selectAll('.spritesheet').data(_spritesheetIds);

            spritesheets.enter().append('g').attr('class', function (d) {
              return 'spritesheet spritesheet-' + d;
            }).each(function (d) {
              var url = context.imagePath(d + '.svg');
              var node = select(this).node();
              svg(url).then(function (svg) {
                node.appendChild(select(svg.documentElement).attr('id', 'ideditor-' + d).node());

                if (overrideColors && d !== 'iD-sprite') {
                  // allow icon colors to be overridden..
                  select(node).selectAll('path').attr('fill', 'currentColor');
                }
              })["catch"](function () {
                /* ignore */
              });
            });
            spritesheets.exit().remove();
          }

          drawDefs.addSprites = addSprites;
          return drawDefs;
        }

        var _layerEnabled$2 = false;

        var _qaService$2;

        function svgKeepRight(projection, context, dispatch) {
          var throttledRedraw = throttle(function () {
            return dispatch.call('change');
          }, 1000);

          var minZoom = 12;
          var touchLayer = select(null);
          var drawLayer = select(null);
          var layerVisible = false;

          function markerPath(selection, klass) {
            selection.attr('class', klass).attr('transform', 'translate(-4, -24)').attr('d', 'M11.6,6.2H7.1l1.4-5.1C8.6,0.6,8.1,0,7.5,0H2.2C1.7,0,1.3,0.3,1.3,0.8L0,10.2c-0.1,0.6,0.4,1.1,0.9,1.1h4.6l-1.8,7.6C3.6,19.4,4.1,20,4.7,20c0.3,0,0.6-0.2,0.8-0.5l6.9-11.9C12.7,7,12.3,6.2,11.6,6.2z');
          } // Loosely-coupled keepRight service for fetching issues.


          function getService() {
            if (services.keepRight && !_qaService$2) {
              _qaService$2 = services.keepRight;

              _qaService$2.on('loaded', throttledRedraw);
            } else if (!services.keepRight && _qaService$2) {
              _qaService$2 = null;
            }

            return _qaService$2;
          } // Show the markers


          function editOn() {
            if (!layerVisible) {
              layerVisible = true;
              drawLayer.style('display', 'block');
            }
          } // Immediately remove the markers and their touch targets


          function editOff() {
            if (layerVisible) {
              layerVisible = false;
              drawLayer.style('display', 'none');
              drawLayer.selectAll('.qaItem.keepRight').remove();
              touchLayer.selectAll('.qaItem.keepRight').remove();
            }
          } // Enable the layer.  This shows the markers and transitions them to visible.


          function layerOn() {
            editOn();
            drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
              return dispatch.call('change');
            });
          } // Disable the layer.  This transitions the layer invisible and then hides the markers.


          function layerOff() {
            throttledRedraw.cancel();
            drawLayer.interrupt();
            touchLayer.selectAll('.qaItem.keepRight').remove();
            drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
              editOff();
              dispatch.call('change');
            });
          } // Update the issue markers


          function updateMarkers() {
            if (!layerVisible || !_layerEnabled$2) return;
            var service = getService();
            var selectedID = context.selectedErrorID();
            var data = service ? service.getItems(projection) : [];
            var getTransform = svgPointTransform(projection); // Draw markers..

            var markers = drawLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
              return d.id;
            }); // exit

            markers.exit().remove(); // enter

            var markersEnter = markers.enter().append('g').attr('class', function (d) {
              return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
            });
            markersEnter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
            markersEnter.append('path').call(markerPath, 'shadow');
            markersEnter.append('use').attr('class', 'qaItem-fill').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').attr('xlink:href', '#iD-icon-bolt'); // update

            markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
              return d.id === selectedID;
            }).attr('transform', getTransform); // Draw targets..

            if (touchLayer.empty()) return;
            var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
            var targets = touchLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
              return d.id;
            }); // exit

            targets.exit().remove(); // enter/update

            targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
              return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
            }).attr('transform', getTransform);

            function sortY(a, b) {
              return a.id === selectedID ? 1 : b.id === selectedID ? -1 : a.severity === 'error' && b.severity !== 'error' ? 1 : b.severity === 'error' && a.severity !== 'error' ? -1 : b.loc[1] - a.loc[1];
            }
          } // Draw the keepRight layer and schedule loading issues and updating markers.


          function drawKeepRight(selection) {
            var service = getService();
            var surface = context.surface();

            if (surface && !surface.empty()) {
              touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
            }

            drawLayer = selection.selectAll('.layer-keepRight').data(service ? [0] : []);
            drawLayer.exit().remove();
            drawLayer = drawLayer.enter().append('g').attr('class', 'layer-keepRight').style('display', _layerEnabled$2 ? 'block' : 'none').merge(drawLayer);

            if (_layerEnabled$2) {
              if (service && ~~context.map().zoom() >= minZoom) {
                editOn();
                service.loadIssues(projection);
                updateMarkers();
              } else {
                editOff();
              }
            }
          } // Toggles the layer on and off


          drawKeepRight.enabled = function (val) {
            if (!arguments.length) return _layerEnabled$2;
            _layerEnabled$2 = val;

            if (_layerEnabled$2) {
              layerOn();
            } else {
              layerOff();

              if (context.selectedErrorID()) {
                context.enter(modeBrowse(context));
              }
            }

            dispatch.call('change');
            return this;
          };

          drawKeepRight.supported = function () {
            return !!getService();
          };

          return drawKeepRight;
        }

        function svgGeolocate(projection) {
          var layer = select(null);

          var _position;

          function init() {
            if (svgGeolocate.initialized) return; // run once

            svgGeolocate.enabled = false;
            svgGeolocate.initialized = true;
          }

          function showLayer() {
            layer.style('display', 'block');
          }

          function hideLayer() {
            layer.transition().duration(250).style('opacity', 0);
          }

          function layerOn() {
            layer.style('opacity', 0).transition().duration(250).style('opacity', 1);
          }

          function layerOff() {
            layer.style('display', 'none');
          }

          function transform(d) {
            return svgPointTransform(projection)(d);
          }

          function accuracy(accuracy, loc) {
            // converts accuracy to pixels...
            var degreesRadius = geoMetersToLat(accuracy),
                tangentLoc = [loc[0], loc[1] + degreesRadius],
                projectedTangent = projection(tangentLoc),
                projectedLoc = projection([loc[0], loc[1]]); // southern most point will have higher pixel value...

            return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
          }

          function update() {
            var geolocation = {
              loc: [_position.coords.longitude, _position.coords.latitude]
            };
            var groups = layer.selectAll('.geolocations').selectAll('.geolocation').data([geolocation]);
            groups.exit().remove();
            var pointsEnter = groups.enter().append('g').attr('class', 'geolocation');
            pointsEnter.append('circle').attr('class', 'geolocate-radius').attr('dx', '0').attr('dy', '0').attr('fill', 'rgb(15,128,225)').attr('fill-opacity', '0.3').attr('r', '0');
            pointsEnter.append('circle').attr('dx', '0').attr('dy', '0').attr('fill', 'rgb(15,128,225)').attr('stroke', 'white').attr('stroke-width', '1.5').attr('r', '6');
            groups.merge(pointsEnter).attr('transform', transform);
            layer.select('.geolocate-radius').attr('r', accuracy(_position.coords.accuracy, geolocation.loc));
          }

          function drawLocation(selection) {
            var enabled = svgGeolocate.enabled;
            layer = selection.selectAll('.layer-geolocate').data([0]);
            layer.exit().remove();
            var layerEnter = layer.enter().append('g').attr('class', 'layer-geolocate').style('display', enabled ? 'block' : 'none');
            layerEnter.append('g').attr('class', 'geolocations');
            layer = layerEnter.merge(layer);

            if (enabled) {
              update();
            } else {
              layerOff();
            }
          }

          drawLocation.enabled = function (position, enabled) {
            if (!arguments.length) return svgGeolocate.enabled;
            _position = position;
            svgGeolocate.enabled = enabled;

            if (svgGeolocate.enabled) {
              showLayer();
              layerOn();
            } else {
              hideLayer();
            }

            return this;
          };

          init();
          return drawLocation;
        }

        function svgLabels(projection, context) {
          var path = d3_geoPath(projection);
          var detected = utilDetect();
          var baselineHack = detected.ie || detected.browser.toLowerCase() === 'edge' || detected.browser.toLowerCase() === 'firefox' && detected.version >= 70;

          var _rdrawn = new RBush();

          var _rskipped = new RBush();

          var _textWidthCache = {};
          var _entitybboxes = {}; // Listed from highest to lowest priority

          var labelStack = [['line', 'aeroway', '*', 12], ['line', 'highway', 'motorway', 12], ['line', 'highway', 'trunk', 12], ['line', 'highway', 'primary', 12], ['line', 'highway', 'secondary', 12], ['line', 'highway', 'tertiary', 12], ['line', 'highway', '*', 12], ['line', 'railway', '*', 12], ['line', 'waterway', '*', 12], ['area', 'aeroway', '*', 12], ['area', 'amenity', '*', 12], ['area', 'building', '*', 12], ['area', 'historic', '*', 12], ['area', 'leisure', '*', 12], ['area', 'man_made', '*', 12], ['area', 'natural', '*', 12], ['area', 'shop', '*', 12], ['area', 'tourism', '*', 12], ['area', 'camp_site', '*', 12], ['point', 'aeroway', '*', 10], ['point', 'amenity', '*', 10], ['point', 'building', '*', 10], ['point', 'historic', '*', 10], ['point', 'leisure', '*', 10], ['point', 'man_made', '*', 10], ['point', 'natural', '*', 10], ['point', 'shop', '*', 10], ['point', 'tourism', '*', 10], ['point', 'camp_site', '*', 10], ['line', 'name', '*', 12], ['area', 'name', '*', 12], ['point', 'name', '*', 10]];

          function shouldSkipIcon(preset) {
            var noIcons = ['building', 'landuse', 'natural'];
            return noIcons.some(function (s) {
              return preset.id.indexOf(s) >= 0;
            });
          }

          function get(array, prop) {
            return function (d, i) {
              return array[i][prop];
            };
          }

          function textWidth(text, size, elem) {
            var c = _textWidthCache[size];
            if (!c) c = _textWidthCache[size] = {};

            if (c[text]) {
              return c[text];
            } else if (elem) {
              c[text] = elem.getComputedTextLength();
              return c[text];
            } else {
              var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);

              if (str === null) {
                return size / 3 * 2 * text.length;
              } else {
                return size / 3 * (2 * text.length + str.length);
              }
            }
          }

          function drawLinePaths(selection, entities, filter, classes, labels) {
            var paths = selection.selectAll('path').filter(filter).data(entities, osmEntity.key); // exit

            paths.exit().remove(); // enter/update

            paths.enter().append('path').style('stroke-width', get(labels, 'font-size')).attr('id', function (d) {
              return 'ideditor-labelpath-' + d.id;
            }).attr('class', classes).merge(paths).attr('d', get(labels, 'lineString'));
          }

          function drawLineLabels(selection, entities, filter, classes, labels) {
            var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit

            texts.exit().remove(); // enter

            texts.enter().append('text').attr('class', function (d, i) {
              return classes + ' ' + labels[i].classes + ' ' + d.id;
            }).attr('dy', baselineHack ? '0.35em' : null).append('textPath').attr('class', 'textpath'); // update

            selection.selectAll('text.' + classes).selectAll('.textpath').filter(filter).data(entities, osmEntity.key).attr('startOffset', '50%').attr('xlink:href', function (d) {
              return '#ideditor-labelpath-' + d.id;
            }).text(utilDisplayNameForPath);
          }

          function drawPointLabels(selection, entities, filter, classes, labels) {
            var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit

            texts.exit().remove(); // enter/update

            texts.enter().append('text').attr('class', function (d, i) {
              return classes + ' ' + labels[i].classes + ' ' + d.id;
            }).merge(texts).attr('x', get(labels, 'x')).attr('y', get(labels, 'y')).style('text-anchor', get(labels, 'textAnchor')).text(utilDisplayName).each(function (d, i) {
              textWidth(utilDisplayName(d), labels[i].height, this);
            });
          }

          function drawAreaLabels(selection, entities, filter, classes, labels) {
            entities = entities.filter(hasText);
            labels = labels.filter(hasText);
            drawPointLabels(selection, entities, filter, classes, labels);

            function hasText(d, i) {
              return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
            }
          }

          function drawAreaIcons(selection, entities, filter, classes, labels) {
            var icons = selection.selectAll('use.' + classes).filter(filter).data(entities, osmEntity.key); // exit

            icons.exit().remove(); // enter/update

            icons.enter().append('use').attr('class', 'icon ' + classes).attr('width', '17px').attr('height', '17px').merge(icons).attr('transform', get(labels, 'transform')).attr('xlink:href', function (d) {
              var preset = _mainPresetIndex.match(d, context.graph());
              var picon = preset && preset.icon;

              if (!picon) {
                return '';
              } else {
                var isMaki = /^maki-/.test(picon);
                return '#' + picon + (isMaki ? '-15' : '');
              }
            });
          }

          function drawCollisionBoxes(selection, rtree, which) {
            var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
            var gj = [];

            if (context.getDebug('collision')) {
              gj = rtree.all().map(function (d) {
                return {
                  type: 'Polygon',
                  coordinates: [[[d.minX, d.minY], [d.maxX, d.minY], [d.maxX, d.maxY], [d.minX, d.maxY], [d.minX, d.minY]]]
                };
              });
            }

            var boxes = selection.selectAll('.' + which).data(gj); // exit

            boxes.exit().remove(); // enter/update

            boxes.enter().append('path').attr('class', classes).merge(boxes).attr('d', d3_geoPath());
          }

          function drawLabels(selection, graph, entities, filter, dimensions, fullRedraw) {
            var wireframe = context.surface().classed('fill-wireframe');
            var zoom = geoScaleToZoom(projection.scale());
            var labelable = [];
            var renderNodeAs = {};
            var i, j, k, entity, geometry;

            for (i = 0; i < labelStack.length; i++) {
              labelable.push([]);
            }

            if (fullRedraw) {
              _rdrawn.clear();

              _rskipped.clear();

              _entitybboxes = {};
            } else {
              for (i = 0; i < entities.length; i++) {
                entity = entities[i];
                var toRemove = [].concat(_entitybboxes[entity.id] || []).concat(_entitybboxes[entity.id + 'I'] || []);

                for (j = 0; j < toRemove.length; j++) {
                  _rdrawn.remove(toRemove[j]);

                  _rskipped.remove(toRemove[j]);
                }
              }
            } // Loop through all the entities to do some preprocessing


            for (i = 0; i < entities.length; i++) {
              entity = entities[i];
              geometry = entity.geometry(graph); // Insert collision boxes around interesting points/vertices

              if (geometry === 'point' || geometry === 'vertex' && isInterestingVertex(entity)) {
                var hasDirections = entity.directions(graph, projection).length;
                var markerPadding;

                if (!wireframe && geometry === 'point' && !(zoom >= 18 && hasDirections)) {
                  renderNodeAs[entity.id] = 'point';
                  markerPadding = 20; // extra y for marker height
                } else {
                  renderNodeAs[entity.id] = 'vertex';
                  markerPadding = 0;
                }

                var coord = projection(entity.loc);
                var nodePadding = 10;
                var bbox = {
                  minX: coord[0] - nodePadding,
                  minY: coord[1] - nodePadding - markerPadding,
                  maxX: coord[0] + nodePadding,
                  maxY: coord[1] + nodePadding
                };
                doInsert(bbox, entity.id + 'P');
              } // From here on, treat vertices like points


              if (geometry === 'vertex') {
                geometry = 'point';
              } // Determine which entities are label-able


              var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
              var icon = preset && !shouldSkipIcon(preset) && preset.icon;
              if (!icon && !utilDisplayName(entity)) continue;

              for (k = 0; k < labelStack.length; k++) {
                var matchGeom = labelStack[k][0];
                var matchKey = labelStack[k][1];
                var matchVal = labelStack[k][2];
                var hasVal = entity.tags[matchKey];

                if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
                  labelable[k].push(entity);
                  break;
                }
              }
            }

            var positions = {
              point: [],
              line: [],
              area: []
            };
            var labelled = {
              point: [],
              line: [],
              area: []
            }; // Try and find a valid label for labellable entities

            for (k = 0; k < labelable.length; k++) {
              var fontSize = labelStack[k][3];

              for (i = 0; i < labelable[k].length; i++) {
                entity = labelable[k][i];
                geometry = entity.geometry(graph);
                var getName = geometry === 'line' ? utilDisplayNameForPath : utilDisplayName;
                var name = getName(entity);
                var width = name && textWidth(name, fontSize);
                var p = null;

                if (geometry === 'point' || geometry === 'vertex') {
                  // no point or vertex labels in wireframe mode
                  // no vertex labels at low zooms (vertices have no icons)
                  if (wireframe) continue;
                  var renderAs = renderNodeAs[entity.id];
                  if (renderAs === 'vertex' && zoom < 17) continue;
                  p = getPointLabel(entity, width, fontSize, renderAs);
                } else if (geometry === 'line') {
                  p = getLineLabel(entity, width, fontSize);
                } else if (geometry === 'area') {
                  p = getAreaLabel(entity, width, fontSize);
                }

                if (p) {
                  if (geometry === 'vertex') {
                    geometry = 'point';
                  } // treat vertex like point


                  p.classes = geometry + ' tag-' + labelStack[k][1];
                  positions[geometry].push(p);
                  labelled[geometry].push(entity);
                }
              }
            }

            function isInterestingVertex(entity) {
              var selectedIDs = context.selectedIDs();
              return entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || selectedIDs.indexOf(entity.id) !== -1 || graph.parentWays(entity).some(function (parent) {
                return selectedIDs.indexOf(parent.id) !== -1;
              });
            }

            function getPointLabel(entity, width, height, geometry) {
              var y = geometry === 'point' ? -12 : 0;
              var pointOffsets = {
                ltr: [15, y, 'start'],
                rtl: [-15, y, 'end']
              };
              var textDirection = _mainLocalizer.textDirection();
              var coord = projection(entity.loc);
              var textPadding = 2;
              var offset = pointOffsets[textDirection];
              var p = {
                height: height,
                width: width,
                x: coord[0] + offset[0],
                y: coord[1] + offset[1],
                textAnchor: offset[2]
              }; // insert a collision box for the text label..

              var bbox;

              if (textDirection === 'rtl') {
                bbox = {
                  minX: p.x - width - textPadding,
                  minY: p.y - height / 2 - textPadding,
                  maxX: p.x + textPadding,
                  maxY: p.y + height / 2 + textPadding
                };
              } else {
                bbox = {
                  minX: p.x - textPadding,
                  minY: p.y - height / 2 - textPadding,
                  maxX: p.x + width + textPadding,
                  maxY: p.y + height / 2 + textPadding
                };
              }

              if (tryInsert([bbox], entity.id, true)) {
                return p;
              }
            }

            function getLineLabel(entity, width, height) {
              var viewport = geoExtent(context.projection.clipExtent()).polygon();
              var points = graph.childNodes(entity).map(function (node) {
                return projection(node.loc);
              });
              var length = geoPathLength(points);
              if (length < width + 20) return; // % along the line to attempt to place the label

              var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70, 25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
              var padding = 3;

              for (var i = 0; i < lineOffsets.length; i++) {
                var offset = lineOffsets[i];
                var middle = offset / 100 * length;
                var start = middle - width / 2;
                if (start < 0 || start + width > length) continue; // generate subpath and ignore paths that are invalid or don't cross viewport.

                var sub = subpath(points, start, start + width);

                if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
                  continue;
                }

                var isReverse = reverse(sub);

                if (isReverse) {
                  sub = sub.reverse();
                }

                var bboxes = [];
                var boxsize = (height + 2) / 2;

                for (var j = 0; j < sub.length - 1; j++) {
                  var a = sub[j];
                  var b = sub[j + 1]; // split up the text into small collision boxes

                  var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));

                  for (var box = 0; box < num; box++) {
                    var p = geoVecInterp(a, b, box / num);
                    var x0 = p[0] - boxsize - padding;
                    var y0 = p[1] - boxsize - padding;
                    var x1 = p[0] + boxsize + padding;
                    var y1 = p[1] + boxsize + padding;
                    bboxes.push({
                      minX: Math.min(x0, x1),
                      minY: Math.min(y0, y1),
                      maxX: Math.max(x0, x1),
                      maxY: Math.max(y0, y1)
                    });
                  }
                }

                if (tryInsert(bboxes, entity.id, false)) {
                  // accept this one
                  return {
                    'font-size': height + 2,
                    lineString: lineString(sub),
                    startOffset: offset + '%'
                  };
                }
              }

              function reverse(p) {
                var angle = Math.atan2(p[1][1] - p[0][1], p[1][0] - p[0][0]);
                return !(p[0][0] < p[p.length - 1][0] && angle < Math.PI / 2 && angle > -Math.PI / 2);
              }

              function lineString(points) {
                return 'M' + points.join('L');
              }

              function subpath(points, from, to) {
                var sofar = 0;
                var start, end, i0, i1;

                for (var i = 0; i < points.length - 1; i++) {
                  var a = points[i];
                  var b = points[i + 1];
                  var current = geoVecLength(a, b);
                  var portion;

                  if (!start && sofar + current >= from) {
                    portion = (from - sofar) / current;
                    start = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
                    i0 = i + 1;
                  }

                  if (!end && sofar + current >= to) {
                    portion = (to - sofar) / current;
                    end = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
                    i1 = i + 1;
                  }

                  sofar += current;
                }

                var result = points.slice(i0, i1);
                result.unshift(start);
                result.push(end);
                return result;
              }
            }

            function getAreaLabel(entity, width, height) {
              var centroid = path.centroid(entity.asGeoJSON(graph));
              var extent = entity.extent(graph);
              var areaWidth = projection(extent[1])[0] - projection(extent[0])[0];
              if (isNaN(centroid[0]) || areaWidth < 20) return;
              var preset = _mainPresetIndex.match(entity, context.graph());
              var picon = preset && preset.icon;
              var iconSize = 17;
              var padding = 2;
              var p = {};

              if (picon) {
                // icon and label..
                if (addIcon()) {
                  addLabel(iconSize + padding);
                  return p;
                }
              } else {
                // label only..
                if (addLabel(0)) {
                  return p;
                }
              }

              function addIcon() {
                var iconX = centroid[0] - iconSize / 2;
                var iconY = centroid[1] - iconSize / 2;
                var bbox = {
                  minX: iconX,
                  minY: iconY,
                  maxX: iconX + iconSize,
                  maxY: iconY + iconSize
                };

                if (tryInsert([bbox], entity.id + 'I', true)) {
                  p.transform = 'translate(' + iconX + ',' + iconY + ')';
                  return true;
                }

                return false;
              }

              function addLabel(yOffset) {
                if (width && areaWidth >= width + 20) {
                  var labelX = centroid[0];
                  var labelY = centroid[1] + yOffset;
                  var bbox = {
                    minX: labelX - width / 2 - padding,
                    minY: labelY - height / 2 - padding,
                    maxX: labelX + width / 2 + padding,
                    maxY: labelY + height / 2 + padding
                  };

                  if (tryInsert([bbox], entity.id, true)) {
                    p.x = labelX;
                    p.y = labelY;
                    p.textAnchor = 'middle';
                    p.height = height;
                    return true;
                  }
                }

                return false;
              }
            } // force insert a singular bounding box
            // singular box only, no array, id better be unique


            function doInsert(bbox, id) {
              bbox.id = id;
              var oldbox = _entitybboxes[id];

              if (oldbox) {
                _rdrawn.remove(oldbox);
              }

              _entitybboxes[id] = bbox;

              _rdrawn.insert(bbox);
            }

            function tryInsert(bboxes, id, saveSkipped) {
              var skipped = false;

              for (var i = 0; i < bboxes.length; i++) {
                var bbox = bboxes[i];
                bbox.id = id; // Check that label is visible

                if (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
                  skipped = true;
                  break;
                }

                if (_rdrawn.collides(bbox)) {
                  skipped = true;
                  break;
                }
              }

              _entitybboxes[id] = bboxes;

              if (skipped) {
                if (saveSkipped) {
                  _rskipped.load(bboxes);
                }
              } else {
                _rdrawn.load(bboxes);
              }

              return !skipped;
            }

            var layer = selection.selectAll('.layer-osm.labels');
            layer.selectAll('.labels-group').data(['halo', 'label', 'debug']).enter().append('g').attr('class', function (d) {
              return 'labels-group ' + d;
            });
            var halo = layer.selectAll('.labels-group.halo');
            var label = layer.selectAll('.labels-group.label');
            var debug = layer.selectAll('.labels-group.debug'); // points

            drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
            drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point); // lines

            drawLinePaths(layer, labelled.line, filter, '', positions.line);
            drawLineLabels(label, labelled.line, filter, 'linelabel', positions.line);
            drawLineLabels(halo, labelled.line, filter, 'linelabel-halo', positions.line); // areas

            drawAreaLabels(label, labelled.area, filter, 'arealabel', positions.area);
            drawAreaLabels(halo, labelled.area, filter, 'arealabel-halo', positions.area);
            drawAreaIcons(label, labelled.area, filter, 'areaicon', positions.area);
            drawAreaIcons(halo, labelled.area, filter, 'areaicon-halo', positions.area); // debug

            drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
            drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
            layer.call(filterLabels);
          }

          function filterLabels(selection) {
            var drawLayer = selection.selectAll('.layer-osm.labels');
            var layers = drawLayer.selectAll('.labels-group.halo, .labels-group.label');
            layers.selectAll('.nolabel').classed('nolabel', false);
            var mouse = context.map().mouse();
            var graph = context.graph();
            var selectedIDs = context.selectedIDs();
            var ids = [];
            var pad, bbox; // hide labels near the mouse

            if (mouse) {
              pad = 20;
              bbox = {
                minX: mouse[0] - pad,
                minY: mouse[1] - pad,
                maxX: mouse[0] + pad,
                maxY: mouse[1] + pad
              };

              var nearMouse = _rdrawn.search(bbox).map(function (entity) {
                return entity.id;
              });

              ids.push.apply(ids, nearMouse);
            } // hide labels on selected nodes (they look weird when dragging / haloed)


            for (var i = 0; i < selectedIDs.length; i++) {
              var entity = graph.hasEntity(selectedIDs[i]);

              if (entity && entity.type === 'node') {
                ids.push(selectedIDs[i]);
              }
            }

            layers.selectAll(utilEntitySelector(ids)).classed('nolabel', true); // draw the mouse bbox if debugging is on..

            var debug = selection.selectAll('.labels-group.debug');
            var gj = [];

            if (context.getDebug('collision')) {
              gj = bbox ? [{
                type: 'Polygon',
                coordinates: [[[bbox.minX, bbox.minY], [bbox.maxX, bbox.minY], [bbox.maxX, bbox.maxY], [bbox.minX, bbox.maxY], [bbox.minX, bbox.minY]]]
              }] : [];
            }

            var box = debug.selectAll('.debug-mouse').data(gj); // exit

            box.exit().remove(); // enter/update

            box.enter().append('path').attr('class', 'debug debug-mouse yellow').merge(box).attr('d', d3_geoPath());
          }

          var throttleFilterLabels = throttle(filterLabels, 100);

          drawLabels.observe = function (selection) {
            var listener = function listener() {
              throttleFilterLabels(selection);
            };

            selection.on('mousemove.hidelabels', listener);
            context.on('enter.hidelabels', listener);
          };

          drawLabels.off = function (selection) {
            throttleFilterLabels.cancel();
            selection.on('mousemove.hidelabels', null);
            context.on('enter.hidelabels', null);
          };

          return drawLabels;
        }

        var _layerEnabled$1 = false;

        var _qaService$1;

        function svgImproveOSM(projection, context, dispatch) {
          var throttledRedraw = throttle(function () {
            return dispatch.call('change');
          }, 1000);

          var minZoom = 12;
          var touchLayer = select(null);
          var drawLayer = select(null);
          var layerVisible = false;

          function markerPath(selection, klass) {
            selection.attr('class', klass).attr('transform', 'translate(-10, -28)').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
          } // Loosely-coupled improveOSM service for fetching issues


          function getService() {
            if (services.improveOSM && !_qaService$1) {
              _qaService$1 = services.improveOSM;

              _qaService$1.on('loaded', throttledRedraw);
            } else if (!services.improveOSM && _qaService$1) {
              _qaService$1 = null;
            }

            return _qaService$1;
          } // Show the markers


          function editOn() {
            if (!layerVisible) {
              layerVisible = true;
              drawLayer.style('display', 'block');
            }
          } // Immediately remove the markers and their touch targets


          function editOff() {
            if (layerVisible) {
              layerVisible = false;
              drawLayer.style('display', 'none');
              drawLayer.selectAll('.qaItem.improveOSM').remove();
              touchLayer.selectAll('.qaItem.improveOSM').remove();
            }
          } // Enable the layer.  This shows the markers and transitions them to visible.


          function layerOn() {
            editOn();
            drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
              return dispatch.call('change');
            });
          } // Disable the layer.  This transitions the layer invisible and then hides the markers.


          function layerOff() {
            throttledRedraw.cancel();
            drawLayer.interrupt();
            touchLayer.selectAll('.qaItem.improveOSM').remove();
            drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
              editOff();
              dispatch.call('change');
            });
          } // Update the issue markers


          function updateMarkers() {
            if (!layerVisible || !_layerEnabled$1) return;
            var service = getService();
            var selectedID = context.selectedErrorID();
            var data = service ? service.getItems(projection) : [];
            var getTransform = svgPointTransform(projection); // Draw markers..

            var markers = drawLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
              return d.id;
            }); // exit

            markers.exit().remove(); // enter

            var markersEnter = markers.enter().append('g').attr('class', function (d) {
              return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
            });
            markersEnter.append('polygon').call(markerPath, 'shadow');
            markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
            markersEnter.append('polygon').attr('fill', 'currentColor').call(markerPath, 'qaItem-fill');
            markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
              var picon = d.icon;

              if (!picon) {
                return '';
              } else {
                var isMaki = /^maki-/.test(picon);
                return "#".concat(picon).concat(isMaki ? '-11' : '');
              }
            }); // update

            markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
              return d.id === selectedID;
            }).attr('transform', getTransform); // Draw targets..

            if (touchLayer.empty()) return;
            var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
            var targets = touchLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
              return d.id;
            }); // exit

            targets.exit().remove(); // enter/update

            targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
              return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
            }).attr('transform', getTransform);

            function sortY(a, b) {
              return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
            }
          } // Draw the ImproveOSM layer and schedule loading issues and updating markers.


          function drawImproveOSM(selection) {
            var service = getService();
            var surface = context.surface();

            if (surface && !surface.empty()) {
              touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
            }

            drawLayer = selection.selectAll('.layer-improveOSM').data(service ? [0] : []);
            drawLayer.exit().remove();
            drawLayer = drawLayer.enter().append('g').attr('class', 'layer-improveOSM').style('display', _layerEnabled$1 ? 'block' : 'none').merge(drawLayer);

            if (_layerEnabled$1) {
              if (service && ~~context.map().zoom() >= minZoom) {
                editOn();
                service.loadIssues(projection);
                updateMarkers();
              } else {
                editOff();
              }
            }
          } // Toggles the layer on and off


          drawImproveOSM.enabled = function (val) {
            if (!arguments.length) return _layerEnabled$1;
            _layerEnabled$1 = val;

            if (_layerEnabled$1) {
              layerOn();
            } else {
              layerOff();

              if (context.selectedErrorID()) {
                context.enter(modeBrowse(context));
              }
            }

            dispatch.call('change');
            return this;
          };

          drawImproveOSM.supported = function () {
            return !!getService();
          };

          return drawImproveOSM;
        }

        var _layerEnabled = false;

        var _qaService;

        function svgOsmose(projection, context, dispatch) {
          var throttledRedraw = throttle(function () {
            return dispatch.call('change');
          }, 1000);

          var minZoom = 12;
          var touchLayer = select(null);
          var drawLayer = select(null);
          var layerVisible = false;

          function markerPath(selection, klass) {
            selection.attr('class', klass).attr('transform', 'translate(-10, -28)').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
          } // Loosely-coupled osmose service for fetching issues


          function getService() {
            if (services.osmose && !_qaService) {
              _qaService = services.osmose;

              _qaService.on('loaded', throttledRedraw);
            } else if (!services.osmose && _qaService) {
              _qaService = null;
            }

            return _qaService;
          } // Show the markers


          function editOn() {
            if (!layerVisible) {
              layerVisible = true;
              drawLayer.style('display', 'block');
            }
          } // Immediately remove the markers and their touch targets


          function editOff() {
            if (layerVisible) {
              layerVisible = false;
              drawLayer.style('display', 'none');
              drawLayer.selectAll('.qaItem.osmose').remove();
              touchLayer.selectAll('.qaItem.osmose').remove();
            }
          } // Enable the layer.  This shows the markers and transitions them to visible.


          function layerOn() {
            editOn();
            drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
              return dispatch.call('change');
            });
          } // Disable the layer.  This transitions the layer invisible and then hides the markers.


          function layerOff() {
            throttledRedraw.cancel();
            drawLayer.interrupt();
            touchLayer.selectAll('.qaItem.osmose').remove();
            drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
              editOff();
              dispatch.call('change');
            });
          } // Update the issue markers


          function updateMarkers() {
            if (!layerVisible || !_layerEnabled) return;
            var service = getService();
            var selectedID = context.selectedErrorID();
            var data = service ? service.getItems(projection) : [];
            var getTransform = svgPointTransform(projection); // Draw markers..

            var markers = drawLayer.selectAll('.qaItem.osmose').data(data, function (d) {
              return d.id;
            }); // exit

            markers.exit().remove(); // enter

            var markersEnter = markers.enter().append('g').attr('class', function (d) {
              return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
            });
            markersEnter.append('polygon').call(markerPath, 'shadow');
            markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
            markersEnter.append('polygon').attr('fill', function (d) {
              return service.getColor(d.item);
            }).call(markerPath, 'qaItem-fill');
            markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
              var picon = d.icon;

              if (!picon) {
                return '';
              } else {
                var isMaki = /^maki-/.test(picon);
                return "#".concat(picon).concat(isMaki ? '-11' : '');
              }
            }); // update

            markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
              return d.id === selectedID;
            }).attr('transform', getTransform); // Draw targets..

            if (touchLayer.empty()) return;
            var fillClass = context.getDebug('target') ? 'pink' : 'nocolor';
            var targets = touchLayer.selectAll('.qaItem.osmose').data(data, function (d) {
              return d.id;
            }); // exit

            targets.exit().remove(); // enter/update

            targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
              return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
            }).attr('transform', getTransform);

            function sortY(a, b) {
              return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
            }
          } // Draw the Osmose layer and schedule loading issues and updating markers.


          function drawOsmose(selection) {
            var service = getService();
            var surface = context.surface();

            if (surface && !surface.empty()) {
              touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
            }

            drawLayer = selection.selectAll('.layer-osmose').data(service ? [0] : []);
            drawLayer.exit().remove();
            drawLayer = drawLayer.enter().append('g').attr('class', 'layer-osmose').style('display', _layerEnabled ? 'block' : 'none').merge(drawLayer);

            if (_layerEnabled) {
              if (service && ~~context.map().zoom() >= minZoom) {
                editOn();
                service.loadIssues(projection);
                updateMarkers();
              } else {
                editOff();
              }
            }
          } // Toggles the layer on and off


          drawOsmose.enabled = function (val) {
            if (!arguments.length) return _layerEnabled;
            _layerEnabled = val;

            if (_layerEnabled) {
              // Strings supplied by Osmose fetched before showing layer for first time
              // NOTE: Currently no way to change locale in iD at runtime, would need to re-call this method if that's ever implemented
              // Also, If layer is toggled quickly multiple requests are sent
              getService().loadStrings().then(layerOn)["catch"](function (err) {
                console.log(err); // eslint-disable-line no-console
              });
            } else {
              layerOff();

              if (context.selectedErrorID()) {
                context.enter(modeBrowse(context));
              }
            }

            dispatch.call('change');
            return this;
          };

          drawOsmose.supported = function () {
            return !!getService();
          };

          return drawOsmose;
        }

        function svgStreetside(projection, context, dispatch) {
          var throttledRedraw = throttle(function () {
            dispatch.call('change');
          }, 1000);

          var minZoom = 14;
          var minMarkerZoom = 16;
          var minViewfieldZoom = 18;
          var layer = select(null);
          var _viewerYaw = 0;
          var _selectedSequence = null;

          var _streetside;
          /**
           * init().
           */


          function init() {
            if (svgStreetside.initialized) return; // run once

            svgStreetside.enabled = false;
            svgStreetside.initialized = true;
          }
          /**
           * getService().
           */


          function getService() {
            if (services.streetside && !_streetside) {
              _streetside = services.streetside;

              _streetside.event.on('viewerChanged.svgStreetside', viewerChanged).on('loadedImages.svgStreetside', throttledRedraw);
            } else if (!services.streetside && _streetside) {
              _streetside = null;
            }

            return _streetside;
          }
          /**
           * showLayer().
           */


          function showLayer() {
            var service = getService();
            if (!service) return;
            editOn();
            layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
              dispatch.call('change');
            });
          }
          /**
           * hideLayer().
           */


          function hideLayer() {
            throttledRedraw.cancel();
            layer.transition().duration(250).style('opacity', 0).on('end', editOff);
          }
          /**
           * editOn().
           */


          function editOn() {
            layer.style('display', 'block');
          }
          /**
           * editOff().
           */


          function editOff() {
            layer.selectAll('.viewfield-group').remove();
            layer.style('display', 'none');
          }
          /**
           * click() Handles 'bubble' point click event.
           */


          function click(d3_event, d) {
            var service = getService();
            if (!service) return; // try to preserve the viewer rotation when staying on the same sequence

            if (d.sequenceKey !== _selectedSequence) {
              _viewerYaw = 0; // reset
            }

            _selectedSequence = d.sequenceKey;
            service.ensureViewerLoaded(context).then(function () {
              service.selectImage(context, d.key).yaw(_viewerYaw).showViewer(context);
            });
            context.map().centerEase(d.loc);
          }
          /**
           * mouseover().
           */


          function mouseover(d3_event, d) {
            var service = getService();
            if (service) service.setStyles(context, d);
          }
          /**
           * mouseout().
           */


          function mouseout() {
            var service = getService();
            if (service) service.setStyles(context, null);
          }
          /**
           * transform().
           */


          function transform(d) {
            var t = svgPointTransform(projection)(d);
            var rot = d.ca + _viewerYaw;

            if (rot) {
              t += ' rotate(' + Math.floor(rot) + ',0,0)';
            }

            return t;
          }

          function viewerChanged() {
            var service = getService();
            if (!service) return;
            var viewer = service.viewer();
            if (!viewer) return; // update viewfield rotation

            _viewerYaw = viewer.getYaw(); // avoid updating if the map is currently transformed
            // e.g. during drags or easing.

            if (context.map().isTransformed()) return;
            layer.selectAll('.viewfield-group.currentView').attr('transform', transform);
          }

          function filterBubbles(bubbles) {
            var fromDate = context.photos().fromDate();
            var toDate = context.photos().toDate();
            var usernames = context.photos().usernames();

            if (fromDate) {
              var fromTimestamp = new Date(fromDate).getTime();
              bubbles = bubbles.filter(function (bubble) {
                return new Date(bubble.captured_at).getTime() >= fromTimestamp;
              });
            }

            if (toDate) {
              var toTimestamp = new Date(toDate).getTime();
              bubbles = bubbles.filter(function (bubble) {
                return new Date(bubble.captured_at).getTime() <= toTimestamp;
              });
            }

            if (usernames) {
              bubbles = bubbles.filter(function (bubble) {
                return usernames.indexOf(bubble.captured_by) !== -1;
              });
            }

            return bubbles;
          }

          function filterSequences(sequences) {
            var fromDate = context.photos().fromDate();
            var toDate = context.photos().toDate();
            var usernames = context.photos().usernames();

            if (fromDate) {
              var fromTimestamp = new Date(fromDate).getTime();
              sequences = sequences.filter(function (sequences) {
                return new Date(sequences.properties.captured_at).getTime() >= fromTimestamp;
              });
            }

            if (toDate) {
              var toTimestamp = new Date(toDate).getTime();
              sequences = sequences.filter(function (sequences) {
                return new Date(sequences.properties.captured_at).getTime() <= toTimestamp;
              });
            }

            if (usernames) {
              sequences = sequences.filter(function (sequences) {
                return usernames.indexOf(sequences.properties.captured_by) !== -1;
              });
            }

            return sequences;
          }
          /**
           * update().
           */


          function update() {
            var viewer = context.container().select('.photoviewer');
            var selected = viewer.empty() ? undefined : viewer.datum();
            var z = ~~context.map().zoom();
            var showMarkers = z >= minMarkerZoom;
            var showViewfields = z >= minViewfieldZoom;
            var service = getService();
            var sequences = [];
            var bubbles = [];

            if (context.photos().showsPanoramic()) {
              sequences = service ? service.sequences(projection) : [];
              bubbles = service && showMarkers ? service.bubbles(projection) : [];
              sequences = filterSequences(sequences);
              bubbles = filterBubbles(bubbles);
            }

            var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
              return d.properties.key;
            }); // exit

            traces.exit().remove(); // enter/update

            traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
            var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(bubbles, function (d) {
              // force reenter once bubbles are attached to a sequence
              return d.key + (d.sequenceKey ? 'v1' : 'v0');
            }); // exit

            groups.exit().remove(); // enter

            var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
            groupsEnter.append('g').attr('class', 'viewfield-scale'); // update

            var markers = groups.merge(groupsEnter).sort(function (a, b) {
              return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1];
            }).attr('transform', transform).select('.viewfield-scale');
            markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
            var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
            viewfields.exit().remove(); // viewfields may or may not be drawn...
            // but if they are, draw below the circles

            viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);

            function viewfieldPath() {
              var d = this.parentNode.__data__;

              if (d.pano) {
                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
              } else {
                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
              }
            }
          }
          /**
           * drawImages()
           * drawImages is the method that is returned (and that runs) every time 'svgStreetside()' is called.
           * 'svgStreetside()' is called from index.js
           */


          function drawImages(selection) {
            var enabled = svgStreetside.enabled;
            var service = getService();
            layer = selection.selectAll('.layer-streetside-images').data(service ? [0] : []);
            layer.exit().remove();
            var layerEnter = layer.enter().append('g').attr('class', 'layer-streetside-images').style('display', enabled ? 'block' : 'none');
            layerEnter.append('g').attr('class', 'sequences');
            layerEnter.append('g').attr('class', 'markers');
            layer = layerEnter.merge(layer);

            if (enabled) {
              if (service && ~~context.map().zoom() >= minZoom) {
                editOn();
                update();
                service.loadBubbles(projection);
              } else {
                editOff();
              }
            }
          }
          /**
           * drawImages.enabled().
           */


          drawImages.enabled = function (_) {
            if (!arguments.length) return svgStreetside.enabled;
            svgStreetside.enabled = _;

            if (svgStreetside.enabled) {
              showLayer();
              context.photos().on('change.streetside', update);
            } else {
              hideLayer();
              context.photos().on('change.streetside', null);
            }

            dispatch.call('change');
            return this;
          };
          /**
           * drawImages.supported().
           */


          drawImages.supported = function () {
            return !!getService();
          };

          init();
          return drawImages;
        }

        function svgMapillaryImages(projection, context, dispatch) {
          var throttledRedraw = throttle(function () {
            dispatch.call('change');
          }, 1000);

          var minZoom = 12;
          var minMarkerZoom = 16;
          var minViewfieldZoom = 18;
          var layer = select(null);

          var _mapillary;

          function init() {
            if (svgMapillaryImages.initialized) return; // run once

            svgMapillaryImages.enabled = false;
            svgMapillaryImages.initialized = true;
          }

          function getService() {
            if (services.mapillary && !_mapillary) {
              _mapillary = services.mapillary;

              _mapillary.event.on('loadedImages', throttledRedraw);
            } else if (!services.mapillary && _mapillary) {
              _mapillary = null;
            }

            return _mapillary;
          }

          function showLayer() {
            var service = getService();
            if (!service) return;
            editOn();
            layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
              dispatch.call('change');
            });
          }

          function hideLayer() {
            throttledRedraw.cancel();
            layer.transition().duration(250).style('opacity', 0).on('end', editOff);
          }

          function editOn() {
            layer.style('display', 'block');
          }

          function editOff() {
            layer.selectAll('.viewfield-group').remove();
            layer.style('display', 'none');
          }

          function click(d3_event, image) {
            var service = getService();
            if (!service) return;
            service.ensureViewerLoaded(context).then(function () {
              service.selectImage(context, image.id).showViewer(context);
            });
            context.map().centerEase(image.loc);
          }

          function mouseover(d3_event, image) {
            var service = getService();
            if (service) service.setStyles(context, image);
          }

          function mouseout() {
            var service = getService();
            if (service) service.setStyles(context, null);
          }

          function transform(d) {
            var t = svgPointTransform(projection)(d);

            if (d.ca) {
              t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
            }

            return t;
          }

          function filterImages(images) {
            var showsPano = context.photos().showsPanoramic();
            var showsFlat = context.photos().showsFlat();
            var fromDate = context.photos().fromDate();
            var toDate = context.photos().toDate();

            if (!showsPano || !showsFlat) {
              images = images.filter(function (image) {
                if (image.is_pano) return showsPano;
                return showsFlat;
              });
            }

            if (fromDate) {
              images = images.filter(function (image) {
                return new Date(image.captured_at).getTime() >= new Date(fromDate).getTime();
              });
            }

            if (toDate) {
              images = images.filter(function (image) {
                return new Date(image.captured_at).getTime() <= new Date(toDate).getTime();
              });
            }

            return images;
          }

          function filterSequences(sequences) {
            var showsPano = context.photos().showsPanoramic();
            var showsFlat = context.photos().showsFlat();
            var fromDate = context.photos().fromDate();
            var toDate = context.photos().toDate();

            if (!showsPano || !showsFlat) {
              sequences = sequences.filter(function (sequence) {
                if (sequence.properties.hasOwnProperty('is_pano')) {
                  if (sequence.properties.is_pano) return showsPano;
                  return showsFlat;
                }

                return false;
              });
            }

            if (fromDate) {
              sequences = sequences.filter(function (sequence) {
                return new Date(sequence.properties.captured_at).getTime() >= new Date(fromDate).getTime().toString();
              });
            }

            if (toDate) {
              sequences = sequences.filter(function (sequence) {
                return new Date(sequence.properties.captured_at).getTime() <= new Date(toDate).getTime().toString();
              });
            }

            return sequences;
          }

          function update() {
            var z = ~~context.map().zoom();
            var showMarkers = z >= minMarkerZoom;
            var showViewfields = z >= minViewfieldZoom;
            var service = getService();
            var sequences = service ? service.sequences(projection) : [];
            var images = service && showMarkers ? service.images(projection) : [];
            images = filterImages(images);
            sequences = filterSequences(sequences);
            service.filterViewer(context);
            var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
              return d.properties.id;
            }); // exit

            traces.exit().remove(); // enter/update

            traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
            var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(images, function (d) {
              return d.id;
            }); // exit

            groups.exit().remove(); // enter

            var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
            groupsEnter.append('g').attr('class', 'viewfield-scale'); // update

            var markers = groups.merge(groupsEnter).sort(function (a, b) {
              return b.loc[1] - a.loc[1]; // sort Y
            }).attr('transform', transform).select('.viewfield-scale');
            markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
            var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
            viewfields.exit().remove();
            viewfields.enter() // viewfields may or may not be drawn...
            .insert('path', 'circle') // but if they are, draw below the circles
            .attr('class', 'viewfield').classed('pano', function () {
              return this.parentNode.__data__.is_pano;
            }).attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);

            function viewfieldPath() {
              if (this.parentNode.__data__.is_pano) {
                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
              } else {
                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
              }
            }
          }

          function drawImages(selection) {
            var enabled = svgMapillaryImages.enabled;
            var service = getService();
            layer = selection.selectAll('.layer-mapillary').data(service ? [0] : []);
            layer.exit().remove();
            var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary').style('display', enabled ? 'block' : 'none');
            layerEnter.append('g').attr('class', 'sequences');
            layerEnter.append('g').attr('class', 'markers');
            layer = layerEnter.merge(layer);

            if (enabled) {
              if (service && ~~context.map().zoom() >= minZoom) {
                editOn();
                update();
                service.loadImages(projection);
              } else {
                editOff();
              }
            }
          }

          drawImages.enabled = function (_) {
            if (!arguments.length) return svgMapillaryImages.enabled;
            svgMapillaryImages.enabled = _;

            if (svgMapillaryImages.enabled) {
              showLayer();
              context.photos().on('change.mapillary_images', update);
            } else {
              hideLayer();
              context.photos().on('change.mapillary_images', null);
            }

            dispatch.call('change');
            return this;
          };

          drawImages.supported = function () {
            return !!getService();
          };

          init();
          return drawImages;
        }

        function svgMapillaryPosition(projection, context) {
          var throttledRedraw = throttle(function () {
            update();
          }, 1000);

          var minZoom = 12;
          var minViewfieldZoom = 18;
          var layer = select(null);

          var _mapillary;

          var viewerCompassAngle;

          function init() {
            if (svgMapillaryPosition.initialized) return; // run once

            svgMapillaryPosition.initialized = true;
          }

          function getService() {
            if (services.mapillary && !_mapillary) {
              _mapillary = services.mapillary;

              _mapillary.event.on('imageChanged', throttledRedraw);

              _mapillary.event.on('bearingChanged', function (e) {
                viewerCompassAngle = e.bearing;
                if (context.map().isTransformed()) return;
                layer.selectAll('.viewfield-group.currentView').filter(function (d) {
                  return d.is_pano;
                }).attr('transform', transform);
              });
            } else if (!services.mapillary && _mapillary) {
              _mapillary = null;
            }

            return _mapillary;
          }

          function editOn() {
            layer.style('display', 'block');
          }

          function editOff() {
            layer.selectAll('.viewfield-group').remove();
            layer.style('display', 'none');
          }

          function transform(d) {
            var t = svgPointTransform(projection)(d);

            if (d.is_pano && viewerCompassAngle !== null && isFinite(viewerCompassAngle)) {
              t += ' rotate(' + Math.floor(viewerCompassAngle) + ',0,0)';
            } else if (d.ca) {
              t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
            }

            return t;
          }

          function update() {
            var z = ~~context.map().zoom();
            var showViewfields = z >= minViewfieldZoom;
            var service = getService();
            var image = service && service.getActiveImage();
            var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(image ? [image] : [], function (d) {
              return d.id;
            }); // exit

            groups.exit().remove(); // enter

            var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group currentView highlighted');
            groupsEnter.append('g').attr('class', 'viewfield-scale'); // update

            var markers = groups.merge(groupsEnter).attr('transform', transform).select('.viewfield-scale');
            markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
            var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
            viewfields.exit().remove();
            viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
          }

          function drawImages(selection) {
            var service = getService();
            layer = selection.selectAll('.layer-mapillary-position').data(service ? [0] : []);
            layer.exit().remove();
            var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary-position');
            layerEnter.append('g').attr('class', 'markers');
            layer = layerEnter.merge(layer);

            if (service && ~~context.map().zoom() >= minZoom) {
              editOn();
              update();
            } else {
              editOff();
            }
          }

          drawImages.enabled = function () {
            update();
            return this;
          };

          drawImages.supported = function () {
            return !!getService();
          };

          init();
          return drawImages;
        }

        function svgMapillarySigns(projection, context, dispatch) {
          var throttledRedraw = throttle(function () {
            dispatch.call('change');
          }, 1000);

          var minZoom = 12;
          var layer = select(null);

          var _mapillary;

          function init() {
            if (svgMapillarySigns.initialized) return; // run once

            svgMapillarySigns.enabled = false;
            svgMapillarySigns.initialized = true;
          }

          function getService() {
            if (services.mapillary && !_mapillary) {
              _mapillary = services.mapillary;

              _mapillary.event.on('loadedSigns', throttledRedraw);
            } else if (!services.mapillary && _mapillary) {
              _mapillary = null;
            }

            return _mapillary;
          }

          function showLayer() {
            var service = getService();
            if (!service) return;
            service.loadSignResources(context);
            editOn();
          }

          function hideLayer() {
            throttledRedraw.cancel();
            editOff();
          }

          function editOn() {
            layer.style('display', 'block');
          }

          function editOff() {
            layer.selectAll('.icon-sign').remove();
            layer.style('display', 'none');
          }

          function click(d3_event, d) {
            var service = getService();
            if (!service) return;
            context.map().centerEase(d.loc);
            var selectedImageId = service.getActiveImage() && service.getActiveImage().id;
            service.getDetections(d.id).then(function (detections) {
              if (detections.length) {
                var imageId = detections[0].image.id;

                if (imageId === selectedImageId) {
                  service.highlightDetection(detections[0]).selectImage(context, imageId);
                } else {
                  service.ensureViewerLoaded(context).then(function () {
                    service.highlightDetection(detections[0]).selectImage(context, imageId).showViewer(context);
                  });
                }
              }
            });
          }

          function filterData(detectedFeatures) {
            var fromDate = context.photos().fromDate();
            var toDate = context.photos().toDate();

            if (fromDate) {
              var fromTimestamp = new Date(fromDate).getTime();
              detectedFeatures = detectedFeatures.filter(function (feature) {
                return new Date(feature.last_seen_at).getTime() >= fromTimestamp;
              });
            }

            if (toDate) {
              var toTimestamp = new Date(toDate).getTime();
              detectedFeatures = detectedFeatures.filter(function (feature) {
                return new Date(feature.first_seen_at).getTime() <= toTimestamp;
              });
            }

            return detectedFeatures;
          }

          function update() {
            var service = getService();
            var data = service ? service.signs(projection) : [];
            data = filterData(data);
            var transform = svgPointTransform(projection);
            var signs = layer.selectAll('.icon-sign').data(data, function (d) {
              return d.id;
            }); // exit

            signs.exit().remove(); // enter

            var enter = signs.enter().append('g').attr('class', 'icon-sign icon-detected').on('click', click);
            enter.append('use').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px').attr('xlink:href', function (d) {
              return '#' + d.value;
            });
            enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update

            signs.merge(enter).attr('transform', transform);
          }

          function drawSigns(selection) {
            var enabled = svgMapillarySigns.enabled;
            var service = getService();
            layer = selection.selectAll('.layer-mapillary-signs').data(service ? [0] : []);
            layer.exit().remove();
            layer = layer.enter().append('g').attr('class', 'layer-mapillary-signs layer-mapillary-detections').style('display', enabled ? 'block' : 'none').merge(layer);

            if (enabled) {
              if (service && ~~context.map().zoom() >= minZoom) {
                editOn();
                update();
                service.loadSigns(projection);
                service.showSignDetections(true);
              } else {
                editOff();
              }
            } else if (service) {
              service.showSignDetections(false);
            }
          }

          drawSigns.enabled = function (_) {
            if (!arguments.length) return svgMapillarySigns.enabled;
            svgMapillarySigns.enabled = _;

            if (svgMapillarySigns.enabled) {
              showLayer();
              context.photos().on('change.mapillary_signs', update);
            } else {
              hideLayer();
              context.photos().on('change.mapillary_signs', null);
            }

            dispatch.call('change');
            return this;
          };

          drawSigns.supported = function () {
            return !!getService();
          };

          init();
          return drawSigns;
        }

        function svgMapillaryMapFeatures(projection, context, dispatch) {
          var throttledRedraw = throttle(function () {
            dispatch.call('change');
          }, 1000);

          var minZoom = 12;
          var layer = select(null);

          var _mapillary;

          function init() {
            if (svgMapillaryMapFeatures.initialized) return; // run once

            svgMapillaryMapFeatures.enabled = false;
            svgMapillaryMapFeatures.initialized = true;
          }

          function getService() {
            if (services.mapillary && !_mapillary) {
              _mapillary = services.mapillary;

              _mapillary.event.on('loadedMapFeatures', throttledRedraw);
            } else if (!services.mapillary && _mapillary) {
              _mapillary = null;
            }

            return _mapillary;
          }

          function showLayer() {
            var service = getService();
            if (!service) return;
            service.loadObjectResources(context);
            editOn();
          }

          function hideLayer() {
            throttledRedraw.cancel();
            editOff();
          }

          function editOn() {
            layer.style('display', 'block');
          }

          function editOff() {
            layer.selectAll('.icon-map-feature').remove();
            layer.style('display', 'none');
          }

          function click(d3_event, d) {
            var service = getService();
            if (!service) return;
            context.map().centerEase(d.loc);
            var selectedImageId = service.getActiveImage() && service.getActiveImage().id;
            service.getDetections(d.id).then(function (detections) {
              if (detections.length) {
                var imageId = detections[0].image.id;

                if (imageId === selectedImageId) {
                  service.highlightDetection(detections[0]).selectImage(context, imageId);
                } else {
                  service.ensureViewerLoaded(context).then(function () {
                    service.highlightDetection(detections[0]).selectImage(context, imageId).showViewer(context);
                  });
                }
              }
            });
          }

          function filterData(detectedFeatures) {
            var fromDate = context.photos().fromDate();
            var toDate = context.photos().toDate();

            if (fromDate) {
              detectedFeatures = detectedFeatures.filter(function (feature) {
                return new Date(feature.last_seen_at).getTime() >= new Date(fromDate).getTime();
              });
            }

            if (toDate) {
              detectedFeatures = detectedFeatures.filter(function (feature) {
                return new Date(feature.first_seen_at).getTime() <= new Date(toDate).getTime();
              });
            }

            return detectedFeatures;
          }

          function update() {
            var service = getService();
            var data = service ? service.mapFeatures(projection) : [];
            data = filterData(data);
            var transform = svgPointTransform(projection);
            var mapFeatures = layer.selectAll('.icon-map-feature').data(data, function (d) {
              return d.id;
            }); // exit

            mapFeatures.exit().remove(); // enter

            var enter = mapFeatures.enter().append('g').attr('class', 'icon-map-feature icon-detected').on('click', click);
            enter.append('title').text(function (d) {
              var id = d.value.replace(/--/g, '.').replace(/-/g, '_');
              return _t('mapillary_map_features.' + id);
            });
            enter.append('use').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px').attr('xlink:href', function (d) {
              if (d.value === 'object--billboard') {
                // no billboard icon right now, so use the advertisement icon
                return '#object--sign--advertisement';
              }

              return '#' + d.value;
            });
            enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update

            mapFeatures.merge(enter).attr('transform', transform);
          }

          function drawMapFeatures(selection) {
            var enabled = svgMapillaryMapFeatures.enabled;
            var service = getService();
            layer = selection.selectAll('.layer-mapillary-map-features').data(service ? [0] : []);
            layer.exit().remove();
            layer = layer.enter().append('g').attr('class', 'layer-mapillary-map-features layer-mapillary-detections').style('display', enabled ? 'block' : 'none').merge(layer);

            if (enabled) {
              if (service && ~~context.map().zoom() >= minZoom) {
                editOn();
                update();
                service.loadMapFeatures(projection);
                service.showFeatureDetections(true);
              } else {
                editOff();
              }
            } else if (service) {
              service.showFeatureDetections(false);
            }
          }

          drawMapFeatures.enabled = function (_) {
            if (!arguments.length) return svgMapillaryMapFeatures.enabled;
            svgMapillaryMapFeatures.enabled = _;

            if (svgMapillaryMapFeatures.enabled) {
              showLayer();
              context.photos().on('change.mapillary_map_features', update);
            } else {
              hideLayer();
              context.photos().on('change.mapillary_map_features', null);
            }

            dispatch.call('change');
            return this;
          };

          drawMapFeatures.supported = function () {
            return !!getService();
          };

          init();
          return drawMapFeatures;
        }

        function svgOpenstreetcamImages(projection, context, dispatch) {
          var throttledRedraw = throttle(function () {
            dispatch.call('change');
          }, 1000);

          var minZoom = 12;
          var minMarkerZoom = 16;
          var minViewfieldZoom = 18;
          var layer = select(null);

          var _openstreetcam;

          function init() {
            if (svgOpenstreetcamImages.initialized) return; // run once

            svgOpenstreetcamImages.enabled = false;
            svgOpenstreetcamImages.initialized = true;
          }

          function getService() {
            if (services.openstreetcam && !_openstreetcam) {
              _openstreetcam = services.openstreetcam;

              _openstreetcam.event.on('loadedImages', throttledRedraw);
            } else if (!services.openstreetcam && _openstreetcam) {
              _openstreetcam = null;
            }

            return _openstreetcam;
          }

          function showLayer() {
            var service = getService();
            if (!service) return;
            editOn();
            layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
              dispatch.call('change');
            });
          }

          function hideLayer() {
            throttledRedraw.cancel();
            layer.transition().duration(250).style('opacity', 0).on('end', editOff);
          }

          function editOn() {
            layer.style('display', 'block');
          }

          function editOff() {
            layer.selectAll('.viewfield-group').remove();
            layer.style('display', 'none');
          }

          function click(d3_event, d) {
            var service = getService();
            if (!service) return;
            service.ensureViewerLoaded(context).then(function () {
              service.selectImage(context, d.key).showViewer(context);
            });
            context.map().centerEase(d.loc);
          }

          function mouseover(d3_event, d) {
            var service = getService();
            if (service) service.setStyles(context, d);
          }

          function mouseout() {
            var service = getService();
            if (service) service.setStyles(context, null);
          }

          function transform(d) {
            var t = svgPointTransform(projection)(d);

            if (d.ca) {
              t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
            }

            return t;
          }

          function filterImages(images) {
            var fromDate = context.photos().fromDate();
            var toDate = context.photos().toDate();
            var usernames = context.photos().usernames();

            if (fromDate) {
              var fromTimestamp = new Date(fromDate).getTime();
              images = images.filter(function (item) {
                return new Date(item.captured_at).getTime() >= fromTimestamp;
              });
            }

            if (toDate) {
              var toTimestamp = new Date(toDate).getTime();
              images = images.filter(function (item) {
                return new Date(item.captured_at).getTime() <= toTimestamp;
              });
            }

            if (usernames) {
              images = images.filter(function (item) {
                return usernames.indexOf(item.captured_by) !== -1;
              });
            }

            return images;
          }

          function filterSequences(sequences) {
            var fromDate = context.photos().fromDate();
            var toDate = context.photos().toDate();
            var usernames = context.photos().usernames();

            if (fromDate) {
              var fromTimestamp = new Date(fromDate).getTime();
              sequences = sequences.filter(function (image) {
                return new Date(image.properties.captured_at).getTime() >= fromTimestamp;
              });
            }

            if (toDate) {
              var toTimestamp = new Date(toDate).getTime();
              sequences = sequences.filter(function (image) {
                return new Date(image.properties.captured_at).getTime() <= toTimestamp;
              });
            }

            if (usernames) {
              sequences = sequences.filter(function (image) {
                return usernames.indexOf(image.properties.captured_by) !== -1;
              });
            }

            return sequences;
          }

          function update() {
            var viewer = context.container().select('.photoviewer');
            var selected = viewer.empty() ? undefined : viewer.datum();
            var z = ~~context.map().zoom();
            var showMarkers = z >= minMarkerZoom;
            var showViewfields = z >= minViewfieldZoom;
            var service = getService();
            var sequences = [];
            var images = [];

            if (context.photos().showsFlat()) {
              sequences = service ? service.sequences(projection) : [];
              images = service && showMarkers ? service.images(projection) : [];
              sequences = filterSequences(sequences);
              images = filterImages(images);
            }

            var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
              return d.properties.key;
            }); // exit

            traces.exit().remove(); // enter/update

            traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
            var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(images, function (d) {
              return d.key;
            }); // exit

            groups.exit().remove(); // enter

            var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
            groupsEnter.append('g').attr('class', 'viewfield-scale'); // update

            var markers = groups.merge(groupsEnter).sort(function (a, b) {
              return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1]; // sort Y
            }).attr('transform', transform).select('.viewfield-scale');
            markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
            var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
            viewfields.exit().remove();
            viewfields.enter() // viewfields may or may not be drawn...
            .insert('path', 'circle') // but if they are, draw below the circles
            .attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
          }

          function drawImages(selection) {
            var enabled = svgOpenstreetcamImages.enabled,
                service = getService();
            layer = selection.selectAll('.layer-openstreetcam').data(service ? [0] : []);
            layer.exit().remove();
            var layerEnter = layer.enter().append('g').attr('class', 'layer-openstreetcam').style('display', enabled ? 'block' : 'none');
            layerEnter.append('g').attr('class', 'sequences');
            layerEnter.append('g').attr('class', 'markers');
            layer = layerEnter.merge(layer);

            if (enabled) {
              if (service && ~~context.map().zoom() >= minZoom) {
                editOn();
                update();
                service.loadImages(projection);
              } else {
                editOff();
              }
            }
          }

          drawImages.enabled = function (_) {
            if (!arguments.length) return svgOpenstreetcamImages.enabled;
            svgOpenstreetcamImages.enabled = _;

            if (svgOpenstreetcamImages.enabled) {
              showLayer();
              context.photos().on('change.openstreetcam_images', update);
            } else {
              hideLayer();
              context.photos().on('change.openstreetcam_images', null);
            }

            dispatch.call('change');
            return this;
          };

          drawImages.supported = function () {
            return !!getService();
          };

          init();
          return drawImages;
        }

        function svgOsm(projection, context, dispatch) {
          var enabled = true;

          function drawOsm(selection) {
            selection.selectAll('.layer-osm').data(['covered', 'areas', 'lines', 'points', 'labels']).enter().append('g').attr('class', function (d) {
              return 'layer-osm ' + d;
            });
            selection.selectAll('.layer-osm.points').selectAll('.points-group').data(['points', 'midpoints', 'vertices', 'turns']).enter().append('g').attr('class', function (d) {
              return 'points-group ' + d;
            });
          }

          function showLayer() {
            var layer = context.surface().selectAll('.data-layer.osm');
            layer.interrupt();
            layer.classed('disabled', false).style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
              dispatch.call('change');
            });
          }

          function hideLayer() {
            var layer = context.surface().selectAll('.data-layer.osm');
            layer.interrupt();
            layer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
              layer.classed('disabled', true);
              dispatch.call('change');
            });
          }

          drawOsm.enabled = function (val) {
            if (!arguments.length) return enabled;
            enabled = val;

            if (enabled) {
              showLayer();
            } else {
              hideLayer();
            }

            dispatch.call('change');
            return this;
          };

          return drawOsm;
        }

        var _notesEnabled = false;

        var _osmService;

        function svgNotes(projection, context, dispatch) {
          if (!dispatch) {
            dispatch = dispatch$8('change');
          }

          var throttledRedraw = throttle(function () {
            dispatch.call('change');
          }, 1000);

          var minZoom = 12;
          var touchLayer = select(null);
          var drawLayer = select(null);
          var _notesVisible = false;

          function markerPath(selection, klass) {
            selection.attr('class', klass).attr('transform', 'translate(-8, -22)').attr('d', 'm17.5,0l-15,0c-1.37,0 -2.5,1.12 -2.5,2.5l0,11.25c0,1.37 1.12,2.5 2.5,2.5l3.75,0l0,3.28c0,0.38 0.43,0.6 0.75,0.37l4.87,-3.65l5.62,0c1.37,0 2.5,-1.12 2.5,-2.5l0,-11.25c0,-1.37 -1.12,-2.5 -2.5,-2.5z');
          } // Loosely-coupled osm service for fetching notes.


          function getService() {
            if (services.osm && !_osmService) {
              _osmService = services.osm;

              _osmService.on('loadedNotes', throttledRedraw);
            } else if (!services.osm && _osmService) {
              _osmService = null;
            }

            return _osmService;
          } // Show the notes


          function editOn() {
            if (!_notesVisible) {
              _notesVisible = true;
              drawLayer.style('display', 'block');
            }
          } // Immediately remove the notes and their touch targets


          function editOff() {
            if (_notesVisible) {
              _notesVisible = false;
              drawLayer.style('display', 'none');
              drawLayer.selectAll('.note').remove();
              touchLayer.selectAll('.note').remove();
            }
          } // Enable the layer.  This shows the notes and transitions them to visible.


          function layerOn() {
            editOn();
            drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
              dispatch.call('change');
            });
          } // Disable the layer.  This transitions the layer invisible and then hides the notes.


          function layerOff() {
            throttledRedraw.cancel();
            drawLayer.interrupt();
            touchLayer.selectAll('.note').remove();
            drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
              editOff();
              dispatch.call('change');
            });
          } // Update the note markers


          function updateMarkers() {
            if (!_notesVisible || !_notesEnabled) return;
            var service = getService();
            var selectedID = context.selectedNoteID();
            var data = service ? service.notes(projection) : [];
            var getTransform = svgPointTransform(projection); // Draw markers..

            var notes = drawLayer.selectAll('.note').data(data, function (d) {
              return d.status + d.id;
            }); // exit

            notes.exit().remove(); // enter

            var notesEnter = notes.enter().append('g').attr('class', function (d) {
              return 'note note-' + d.id + ' ' + d.status;
            }).classed('new', function (d) {
              return d.id < 0;
            });
            notesEnter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
            notesEnter.append('path').call(markerPath, 'shadow');
            notesEnter.append('use').attr('class', 'note-fill').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').attr('xlink:href', '#iD-icon-note');
            notesEnter.selectAll('.icon-annotation').data(function (d) {
              return [d];
            }).enter().append('use').attr('class', 'icon-annotation').attr('width', '10px').attr('height', '10px').attr('x', '-3px').attr('y', '-19px').attr('xlink:href', function (d) {
              if (d.id < 0) return '#iD-icon-plus';
              if (d.status === 'open') return '#iD-icon-close';
              return '#iD-icon-apply';
            }); // update

            notes.merge(notesEnter).sort(sortY).classed('selected', function (d) {
              var mode = context.mode();
              var isMoving = mode && mode.id === 'drag-note'; // no shadows when dragging

              return !isMoving && d.id === selectedID;
            }).attr('transform', getTransform); // Draw targets..

            if (touchLayer.empty()) return;
            var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
            var targets = touchLayer.selectAll('.note').data(data, function (d) {
              return d.id;
            }); // exit

            targets.exit().remove(); // enter/update

            targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
              var newClass = d.id < 0 ? 'new' : '';
              return 'note target note-' + d.id + ' ' + fillClass + newClass;
            }).attr('transform', getTransform);

            function sortY(a, b) {
              if (a.id === selectedID) return 1;
              if (b.id === selectedID) return -1;
              return b.loc[1] - a.loc[1];
            }
          } // Draw the notes layer and schedule loading notes and updating markers.


          function drawNotes(selection) {
            var service = getService();
            var surface = context.surface();

            if (surface && !surface.empty()) {
              touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
            }

            drawLayer = selection.selectAll('.layer-notes').data(service ? [0] : []);
            drawLayer.exit().remove();
            drawLayer = drawLayer.enter().append('g').attr('class', 'layer-notes').style('display', _notesEnabled ? 'block' : 'none').merge(drawLayer);

            if (_notesEnabled) {
              if (service && ~~context.map().zoom() >= minZoom) {
                editOn();
                service.loadNotes(projection);
                updateMarkers();
              } else {
                editOff();
              }
            }
          } // Toggles the layer on and off


          drawNotes.enabled = function (val) {
            if (!arguments.length) return _notesEnabled;
            _notesEnabled = val;

            if (_notesEnabled) {
              layerOn();
            } else {
              layerOff();

              if (context.selectedNoteID()) {
                context.enter(modeBrowse(context));
              }
            }

            dispatch.call('change');
            return this;
          };

          return drawNotes;
        }

        function svgTouch() {
          function drawTouch(selection) {
            selection.selectAll('.layer-touch').data(['areas', 'lines', 'points', 'turns', 'markers']).enter().append('g').attr('class', function (d) {
              return 'layer-touch ' + d;
            });
          }

          return drawTouch;
        }

        function refresh(selection, node) {
          var cr = node.getBoundingClientRect();
          var prop = [cr.width, cr.height];
          selection.property('__dimensions__', prop);
          return prop;
        }

        function utilGetDimensions(selection, force) {
          if (!selection || selection.empty()) {
            return [0, 0];
          }

          var node = selection.node(),
              cached = selection.property('__dimensions__');
          return !cached || force ? refresh(selection, node) : cached;
        }
        function utilSetDimensions(selection, dimensions) {
          if (!selection || selection.empty()) {
            return selection;
          }

          var node = selection.node();

          if (dimensions === null) {
            refresh(selection, node);
            return selection;
          }

          return selection.property('__dimensions__', [dimensions[0], dimensions[1]]).attr('width', dimensions[0]).attr('height', dimensions[1]);
        }

        function svgLayers(projection, context) {
          var dispatch = dispatch$8('change');
          var svg = select(null);
          var _layers = [{
            id: 'osm',
            layer: svgOsm(projection, context, dispatch)
          }, {
            id: 'notes',
            layer: svgNotes(projection, context, dispatch)
          }, {
            id: 'data',
            layer: svgData(projection, context, dispatch)
          }, {
            id: 'keepRight',
            layer: svgKeepRight(projection, context, dispatch)
          }, {
            id: 'improveOSM',
            layer: svgImproveOSM(projection, context, dispatch)
          }, {
            id: 'osmose',
            layer: svgOsmose(projection, context, dispatch)
          }, {
            id: 'streetside',
            layer: svgStreetside(projection, context, dispatch)
          }, {
            id: 'mapillary',
            layer: svgMapillaryImages(projection, context, dispatch)
          }, {
            id: 'mapillary-position',
            layer: svgMapillaryPosition(projection, context)
          }, {
            id: 'mapillary-map-features',
            layer: svgMapillaryMapFeatures(projection, context, dispatch)
          }, {
            id: 'mapillary-signs',
            layer: svgMapillarySigns(projection, context, dispatch)
          }, {
            id: 'openstreetcam',
            layer: svgOpenstreetcamImages(projection, context, dispatch)
          }, {
            id: 'debug',
            layer: svgDebug(projection, context)
          }, {
            id: 'geolocate',
            layer: svgGeolocate(projection)
          }, {
            id: 'touch',
            layer: svgTouch()
          }];

          function drawLayers(selection) {
            svg = selection.selectAll('.surface').data([0]);
            svg = svg.enter().append('svg').attr('class', 'surface').merge(svg);
            var defs = svg.selectAll('.surface-defs').data([0]);
            defs.enter().append('defs').attr('class', 'surface-defs');
            var groups = svg.selectAll('.data-layer').data(_layers);
            groups.exit().remove();
            groups.enter().append('g').attr('class', function (d) {
              return 'data-layer ' + d.id;
            }).merge(groups).each(function (d) {
              select(this).call(d.layer);
            });
          }

          drawLayers.all = function () {
            return _layers;
          };

          drawLayers.layer = function (id) {
            var obj = _layers.find(function (o) {
              return o.id === id;
            });

            return obj && obj.layer;
          };

          drawLayers.only = function (what) {
            var arr = [].concat(what);

            var all = _layers.map(function (layer) {
              return layer.id;
            });

            return drawLayers.remove(utilArrayDifference(all, arr));
          };

          drawLayers.remove = function (what) {
            var arr = [].concat(what);
            arr.forEach(function (id) {
              _layers = _layers.filter(function (o) {
                return o.id !== id;
              });
            });
            dispatch.call('change');
            return this;
          };

          drawLayers.add = function (what) {
            var arr = [].concat(what);
            arr.forEach(function (obj) {
              if ('id' in obj && 'layer' in obj) {
                _layers.push(obj);
              }
            });
            dispatch.call('change');
            return this;
          };

          drawLayers.dimensions = function (val) {
            if (!arguments.length) return utilGetDimensions(svg);
            utilSetDimensions(svg, val);
            return this;
          };

          return utilRebind(drawLayers, dispatch, 'on');
        }

        function svgLines(projection, context) {
          var detected = utilDetect();
          var highway_stack = {
            motorway: 0,
            motorway_link: 1,
            trunk: 2,
            trunk_link: 3,
            primary: 4,
            primary_link: 5,
            secondary: 6,
            tertiary: 7,
            unclassified: 8,
            residential: 9,
            service: 10,
            footway: 11
          };

          function drawTargets(selection, graph, entities, filter) {
            var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
            var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
            var getPath = svgPath(projection).geojson;
            var activeID = context.activeID();
            var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways

            var data = {
              targets: [],
              nopes: []
            };
            entities.forEach(function (way) {
              var features = svgSegmentWay(way, graph, activeID);
              data.targets.push.apply(data.targets, features.passive);
              data.nopes.push.apply(data.nopes, features.active);
            }); // Targets allow hover and vertex snapping

            var targetData = data.targets.filter(getPath);
            var targets = selection.selectAll('.line.target-allowed').filter(function (d) {
              return filter(d.properties.entity);
            }).data(targetData, function key(d) {
              return d.id;
            }); // exit

            targets.exit().remove();

            var segmentWasEdited = function segmentWasEdited(d) {
              var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes

              if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
                return false;
              }

              return d.properties.nodes.some(function (n) {
                return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
              });
            }; // enter/update


            targets.enter().append('path').merge(targets).attr('d', getPath).attr('class', function (d) {
              return 'way line target target-allowed ' + targetClass + d.id;
            }).classed('segment-edited', segmentWasEdited); // NOPE

            var nopeData = data.nopes.filter(getPath);
            var nopes = selection.selectAll('.line.target-nope').filter(function (d) {
              return filter(d.properties.entity);
            }).data(nopeData, function key(d) {
              return d.id;
            }); // exit

            nopes.exit().remove(); // enter/update

            nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
              return 'way line target target-nope ' + nopeClass + d.id;
            }).classed('segment-edited', segmentWasEdited);
          }

          function drawLines(selection, graph, entities, filter) {
            var base = context.history().base();

            function waystack(a, b) {
              var selected = context.selectedIDs();
              var scoreA = selected.indexOf(a.id) !== -1 ? 20 : 0;
              var scoreB = selected.indexOf(b.id) !== -1 ? 20 : 0;

              if (a.tags.highway) {
                scoreA -= highway_stack[a.tags.highway];
              }

              if (b.tags.highway) {
                scoreB -= highway_stack[b.tags.highway];
              }

              return scoreA - scoreB;
            }

            function drawLineGroup(selection, klass, isSelected) {
              // Note: Don't add `.selected` class in draw modes
              var mode = context.mode();
              var isDrawing = mode && /^draw/.test(mode.id);
              var selectedClass = !isDrawing && isSelected ? 'selected ' : '';
              var lines = selection.selectAll('path').filter(filter).data(getPathData(isSelected), osmEntity.key);
              lines.exit().remove(); // Optimization: Call expensive TagClasses only on enter selection. This
              // works because osmEntity.key is defined to include the entity v attribute.

              lines.enter().append('path').attr('class', function (d) {
                var prefix = 'way line'; // if this line isn't styled by its own tags

                if (!d.hasInterestingTags()) {
                  var parentRelations = graph.parentRelations(d);
                  var parentMultipolygons = parentRelations.filter(function (relation) {
                    return relation.isMultipolygon();
                  }); // and if it's a member of at least one multipolygon relation

                  if (parentMultipolygons.length > 0 && // and only multipolygon relations
                  parentRelations.length === parentMultipolygons.length) {
                    // then fudge the classes to style this as an area edge
                    prefix = 'relation area';
                  }
                }

                var oldMPClass = oldMultiPolygonOuters[d.id] ? 'old-multipolygon ' : '';
                return prefix + ' ' + klass + ' ' + selectedClass + oldMPClass + d.id;
              }).classed('added', function (d) {
                return !base.entities[d.id];
              }).classed('geometry-edited', function (d) {
                return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
              }).classed('retagged', function (d) {
                return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
              }).call(svgTagClasses()).merge(lines).sort(waystack).attr('d', getPath).call(svgTagClasses().tags(svgRelationMemberTags(graph)));
              return selection;
            }

            function getPathData(isSelected) {
              return function () {
                var layer = this.parentNode.__data__;
                var data = pathdata[layer] || [];
                return data.filter(function (d) {
                  if (isSelected) {
                    return context.selectedIDs().indexOf(d.id) !== -1;
                  } else {
                    return context.selectedIDs().indexOf(d.id) === -1;
                  }
                });
              };
            }

            function addMarkers(layergroup, pathclass, groupclass, groupdata, marker) {
              var markergroup = layergroup.selectAll('g.' + groupclass).data([pathclass]);
              markergroup = markergroup.enter().append('g').attr('class', groupclass).merge(markergroup);
              var markers = markergroup.selectAll('path').filter(filter).data(function data() {
                return groupdata[this.parentNode.__data__] || [];
              }, function key(d) {
                return [d.id, d.index];
              });
              markers.exit().remove();
              markers = markers.enter().append('path').attr('class', pathclass).merge(markers).attr('marker-mid', marker).attr('d', function (d) {
                return d.d;
              });

              if (detected.ie) {
                markers.each(function () {
                  this.parentNode.insertBefore(this, this);
                });
              }
            }

            var getPath = svgPath(projection, graph);
            var ways = [];
            var onewaydata = {};
            var sideddata = {};
            var oldMultiPolygonOuters = {};

            for (var i = 0; i < entities.length; i++) {
              var entity = entities[i];
              var outer = osmOldMultipolygonOuterMember(entity, graph);

              if (outer) {
                ways.push(entity.mergeTags(outer.tags));
                oldMultiPolygonOuters[outer.id] = true;
              } else if (entity.geometry(graph) === 'line') {
                ways.push(entity);
              }
            }

            ways = ways.filter(getPath);
            var pathdata = utilArrayGroupBy(ways, function (way) {
              return way.layer();
            });
            Object.keys(pathdata).forEach(function (k) {
              var v = pathdata[k];
              var onewayArr = v.filter(function (d) {
                return d.isOneWay();
              });
              var onewaySegments = svgMarkerSegments(projection, graph, 35, function shouldReverse(entity) {
                return entity.tags.oneway === '-1';
              }, function bothDirections(entity) {
                return entity.tags.oneway === 'reversible' || entity.tags.oneway === 'alternating';
              });
              onewaydata[k] = utilArrayFlatten(onewayArr.map(onewaySegments));
              var sidedArr = v.filter(function (d) {
                return d.isSided();
              });
              var sidedSegments = svgMarkerSegments(projection, graph, 30, function shouldReverse() {
                return false;
              }, function bothDirections() {
                return false;
              });
              sideddata[k] = utilArrayFlatten(sidedArr.map(sidedSegments));
            });
            var covered = selection.selectAll('.layer-osm.covered'); // under areas

            var uncovered = selection.selectAll('.layer-osm.lines'); // over areas

            var touchLayer = selection.selectAll('.layer-touch.lines'); // Draw lines..

            [covered, uncovered].forEach(function (selection) {
              var range = selection === covered ? range$1(-10, 0) : range$1(0, 11);
              var layergroup = selection.selectAll('g.layergroup').data(range);
              layergroup = layergroup.enter().append('g').attr('class', function (d) {
                return 'layergroup layer' + String(d);
              }).merge(layergroup);
              layergroup.selectAll('g.linegroup').data(['shadow', 'casing', 'stroke', 'shadow-highlighted', 'casing-highlighted', 'stroke-highlighted']).enter().append('g').attr('class', function (d) {
                return 'linegroup line-' + d;
              });
              layergroup.selectAll('g.line-shadow').call(drawLineGroup, 'shadow', false);
              layergroup.selectAll('g.line-casing').call(drawLineGroup, 'casing', false);
              layergroup.selectAll('g.line-stroke').call(drawLineGroup, 'stroke', false);
              layergroup.selectAll('g.line-shadow-highlighted').call(drawLineGroup, 'shadow', true);
              layergroup.selectAll('g.line-casing-highlighted').call(drawLineGroup, 'casing', true);
              layergroup.selectAll('g.line-stroke-highlighted').call(drawLineGroup, 'stroke', true);
              addMarkers(layergroup, 'oneway', 'onewaygroup', onewaydata, 'url(#ideditor-oneway-marker)');
              addMarkers(layergroup, 'sided', 'sidedgroup', sideddata, function marker(d) {
                var category = graph.entity(d.id).sidednessIdentifier();
                return 'url(#ideditor-sided-marker-' + category + ')';
              });
            }); // Draw touch targets..

            touchLayer.call(drawTargets, graph, ways, filter);
          }

          return drawLines;
        }

        function svgMidpoints(projection, context) {
          var targetRadius = 8;

          function drawTargets(selection, graph, entities, filter) {
            var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
            var getTransform = svgPointTransform(projection).geojson;
            var data = entities.map(function (midpoint) {
              return {
                type: 'Feature',
                id: midpoint.id,
                properties: {
                  target: true,
                  entity: midpoint
                },
                geometry: {
                  type: 'Point',
                  coordinates: midpoint.loc
                }
              };
            });
            var targets = selection.selectAll('.midpoint.target').filter(function (d) {
              return filter(d.properties.entity);
            }).data(data, function key(d) {
              return d.id;
            }); // exit

            targets.exit().remove(); // enter/update

            targets.enter().append('circle').attr('r', targetRadius).merge(targets).attr('class', function (d) {
              return 'node midpoint target ' + fillClass + d.id;
            }).attr('transform', getTransform);
          }

          function drawMidpoints(selection, graph, entities, filter, extent) {
            var drawLayer = selection.selectAll('.layer-osm.points .points-group.midpoints');
            var touchLayer = selection.selectAll('.layer-touch.points');
            var mode = context.mode();

            if (mode && mode.id !== 'select' || !context.map().withinEditableZoom()) {
              drawLayer.selectAll('.midpoint').remove();
              touchLayer.selectAll('.midpoint.target').remove();
              return;
            }

            var poly = extent.polygon();
            var midpoints = {};

            for (var i = 0; i < entities.length; i++) {
              var entity = entities[i];
              if (entity.type !== 'way') continue;
              if (!filter(entity)) continue;
              if (context.selectedIDs().indexOf(entity.id) < 0) continue;
              var nodes = graph.childNodes(entity);

              for (var j = 0; j < nodes.length - 1; j++) {
                var a = nodes[j];
                var b = nodes[j + 1];
                var id = [a.id, b.id].sort().join('-');

                if (midpoints[id]) {
                  midpoints[id].parents.push(entity);
                } else if (geoVecLength(projection(a.loc), projection(b.loc)) > 40) {
                  var point = geoVecInterp(a.loc, b.loc, 0.5);
                  var loc = null;

                  if (extent.intersects(point)) {
                    loc = point;
                  } else {
                    for (var k = 0; k < 4; k++) {
                      point = geoLineIntersection([a.loc, b.loc], [poly[k], poly[k + 1]]);

                      if (point && geoVecLength(projection(a.loc), projection(point)) > 20 && geoVecLength(projection(b.loc), projection(point)) > 20) {
                        loc = point;
                        break;
                      }
                    }
                  }

                  if (loc) {
                    midpoints[id] = {
                      type: 'midpoint',
                      id: id,
                      loc: loc,
                      edge: [a.id, b.id],
                      parents: [entity]
                    };
                  }
                }
              }
            }

            function midpointFilter(d) {
              if (midpoints[d.id]) return true;

              for (var i = 0; i < d.parents.length; i++) {
                if (filter(d.parents[i])) {
                  return true;
                }
              }

              return false;
            }

            var groups = drawLayer.selectAll('.midpoint').filter(midpointFilter).data(Object.values(midpoints), function (d) {
              return d.id;
            });
            groups.exit().remove();
            var enter = groups.enter().insert('g', ':first-child').attr('class', 'midpoint');
            enter.append('polygon').attr('points', '-6,8 10,0 -6,-8').attr('class', 'shadow');
            enter.append('polygon').attr('points', '-3,4 5,0 -3,-4').attr('class', 'fill');
            groups = groups.merge(enter).attr('transform', function (d) {
              var translate = svgPointTransform(projection);
              var a = graph.entity(d.edge[0]);
              var b = graph.entity(d.edge[1]);
              var angle = geoAngle(a, b, projection) * (180 / Math.PI);
              return translate(d) + ' rotate(' + angle + ')';
            }).call(svgTagClasses().tags(function (d) {
              return d.parents[0].tags;
            })); // Propagate data bindings.

            groups.select('polygon.shadow');
            groups.select('polygon.fill'); // Draw touch targets..

            touchLayer.call(drawTargets, graph, Object.values(midpoints), midpointFilter);
          }

          return drawMidpoints;
        }

        function svgPoints(projection, context) {
          function markerPath(selection, klass) {
            selection.attr('class', klass).attr('transform', 'translate(-8, -23)').attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
          }

          function sortY(a, b) {
            return b.loc[1] - a.loc[1];
          } // Avoid exit/enter if we're just moving stuff around.
          // The node will get a new version but we only need to run the update selection.


          function fastEntityKey(d) {
            var mode = context.mode();
            var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
            return isMoving ? d.id : osmEntity.key(d);
          }

          function drawTargets(selection, graph, entities, filter) {
            var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
            var getTransform = svgPointTransform(projection).geojson;
            var activeID = context.activeID();
            var data = [];
            entities.forEach(function (node) {
              if (activeID === node.id) return; // draw no target on the activeID

              data.push({
                type: 'Feature',
                id: node.id,
                properties: {
                  target: true,
                  entity: node
                },
                geometry: node.asGeoJSON()
              });
            });
            var targets = selection.selectAll('.point.target').filter(function (d) {
              return filter(d.properties.entity);
            }).data(data, function key(d) {
              return d.id;
            }); // exit

            targets.exit().remove(); // enter/update

            targets.enter().append('rect').attr('x', -10).attr('y', -26).attr('width', 20).attr('height', 30).merge(targets).attr('class', function (d) {
              return 'node point target ' + fillClass + d.id;
            }).attr('transform', getTransform);
          }

          function drawPoints(selection, graph, entities, filter) {
            var wireframe = context.surface().classed('fill-wireframe');
            var zoom = geoScaleToZoom(projection.scale());
            var base = context.history().base(); // Points with a direction will render as vertices at higher zooms..

            function renderAsPoint(entity) {
              return entity.geometry(graph) === 'point' && !(zoom >= 18 && entity.directions(graph, projection).length);
            } // All points will render as vertices in wireframe mode too..


            var points = wireframe ? [] : entities.filter(renderAsPoint);
            points.sort(sortY);
            var drawLayer = selection.selectAll('.layer-osm.points .points-group.points');
            var touchLayer = selection.selectAll('.layer-touch.points'); // Draw points..

            var groups = drawLayer.selectAll('g.point').filter(filter).data(points, fastEntityKey);
            groups.exit().remove();
            var enter = groups.enter().append('g').attr('class', function (d) {
              return 'node point ' + d.id;
            }).order();
            enter.append('path').call(markerPath, 'shadow');
            enter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
            enter.append('path').call(markerPath, 'stroke');
            enter.append('use').attr('transform', 'translate(-5, -19)').attr('class', 'icon').attr('width', '11px').attr('height', '11px');
            groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('added', function (d) {
              return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
            }).classed('moved', function (d) {
              return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
            }).classed('retagged', function (d) {
              return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
            }).call(svgTagClasses());
            groups.select('.shadow'); // propagate bound data

            groups.select('.stroke'); // propagate bound data

            groups.select('.icon') // propagate bound data
            .attr('xlink:href', function (entity) {
              var preset = _mainPresetIndex.match(entity, graph);
              var picon = preset && preset.icon;

              if (!picon) {
                return '';
              } else {
                var isMaki = /^maki-/.test(picon);
                return '#' + picon + (isMaki ? '-11' : '');
              }
            }); // Draw touch targets..

            touchLayer.call(drawTargets, graph, points, filter);
          }

          return drawPoints;
        }

        function svgTurns(projection, context) {
          function icon(turn) {
            var u = turn.u ? '-u' : '';
            if (turn.no) return '#iD-turn-no' + u;
            if (turn.only) return '#iD-turn-only' + u;
            return '#iD-turn-yes' + u;
          }

          function drawTurns(selection, graph, turns) {
            function turnTransform(d) {
              var pxRadius = 50;
              var toWay = graph.entity(d.to.way);
              var toPoints = graph.childNodes(toWay).map(function (n) {
                return n.loc;
              }).map(projection);
              var toLength = geoPathLength(toPoints);
              var mid = toLength / 2; // midpoint of destination way

              var toNode = graph.entity(d.to.node);
              var toVertex = graph.entity(d.to.vertex);
              var a = geoAngle(toVertex, toNode, projection);
              var o = projection(toVertex.loc);
              var r = d.u ? 0 // u-turn: no radius
              : !toWay.__via ? pxRadius // leaf way: put marker at pxRadius
              : Math.min(mid, pxRadius); // via way: prefer pxRadius, fallback to mid for very short ways

              return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' + 'rotate(' + a * 180 / Math.PI + ')';
            }

            var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
            var touchLayer = selection.selectAll('.layer-touch.turns'); // Draw turns..

            var groups = drawLayer.selectAll('g.turn').data(turns, function (d) {
              return d.key;
            }); // exit

            groups.exit().remove(); // enter

            var groupsEnter = groups.enter().append('g').attr('class', function (d) {
              return 'turn ' + d.key;
            });
            var turnsEnter = groupsEnter.filter(function (d) {
              return !d.u;
            });
            turnsEnter.append('rect').attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
            turnsEnter.append('use').attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
            var uEnter = groupsEnter.filter(function (d) {
              return d.u;
            });
            uEnter.append('circle').attr('r', '16');
            uEnter.append('use').attr('transform', 'translate(-16, -16)').attr('width', '32').attr('height', '32'); // update

            groups = groups.merge(groupsEnter).attr('opacity', function (d) {
              return d.direct === false ? '0.7' : null;
            }).attr('transform', turnTransform);
            groups.select('use').attr('xlink:href', icon);
            groups.select('rect'); // propagate bound data

            groups.select('circle'); // propagate bound data
            // Draw touch targets..

            var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
            groups = touchLayer.selectAll('g.turn').data(turns, function (d) {
              return d.key;
            }); // exit

            groups.exit().remove(); // enter

            groupsEnter = groups.enter().append('g').attr('class', function (d) {
              return 'turn ' + d.key;
            });
            turnsEnter = groupsEnter.filter(function (d) {
              return !d.u;
            });
            turnsEnter.append('rect').attr('class', 'target ' + fillClass).attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
            uEnter = groupsEnter.filter(function (d) {
              return d.u;
            });
            uEnter.append('circle').attr('class', 'target ' + fillClass).attr('r', '16'); // update

            groups = groups.merge(groupsEnter).attr('transform', turnTransform);
            groups.select('rect'); // propagate bound data

            groups.select('circle'); // propagate bound data

            return this;
          }

          return drawTurns;
        }

        function svgVertices(projection, context) {
          var radiuses = {
            //       z16-, z17,   z18+,  w/icon
            shadow: [6, 7.5, 7.5, 12],
            stroke: [2.5, 3.5, 3.5, 8],
            fill: [1, 1.5, 1.5, 1.5]
          };

          var _currHoverTarget;

          var _currPersistent = {};
          var _currHover = {};
          var _prevHover = {};
          var _currSelected = {};
          var _prevSelected = {};
          var _radii = {};

          function sortY(a, b) {
            return b.loc[1] - a.loc[1];
          } // Avoid exit/enter if we're just moving stuff around.
          // The node will get a new version but we only need to run the update selection.


          function fastEntityKey(d) {
            var mode = context.mode();
            var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
            return isMoving ? d.id : osmEntity.key(d);
          }

          function draw(selection, graph, vertices, sets, filter) {
            sets = sets || {
              selected: {},
              important: {},
              hovered: {}
            };
            var icons = {};
            var directions = {};
            var wireframe = context.surface().classed('fill-wireframe');
            var zoom = geoScaleToZoom(projection.scale());
            var z = zoom < 17 ? 0 : zoom < 18 ? 1 : 2;
            var activeID = context.activeID();
            var base = context.history().base();

            function getIcon(d) {
              // always check latest entity, as fastEntityKey avoids enter/exit now
              var entity = graph.entity(d.id);
              if (entity.id in icons) return icons[entity.id];
              icons[entity.id] = entity.hasInterestingTags() && _mainPresetIndex.match(entity, graph).icon;
              return icons[entity.id];
            } // memoize directions results, return false for empty arrays (for use in filter)


            function getDirections(entity) {
              if (entity.id in directions) return directions[entity.id];
              var angles = entity.directions(graph, projection);
              directions[entity.id] = angles.length ? angles : false;
              return angles;
            }

            function updateAttributes(selection) {
              ['shadow', 'stroke', 'fill'].forEach(function (klass) {
                var rads = radiuses[klass];
                selection.selectAll('.' + klass).each(function (entity) {
                  var i = z && getIcon(entity);
                  var r = rads[i ? 3 : z]; // slightly increase the size of unconnected endpoints #3775

                  if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
                    r += 1.5;
                  }

                  if (klass === 'shadow') {
                    // remember this value, so we don't need to
                    _radii[entity.id] = r; // recompute it when we draw the touch targets
                  }

                  select(this).attr('r', r).attr('visibility', i && klass === 'fill' ? 'hidden' : null);
                });
              });
            }

            vertices.sort(sortY);
            var groups = selection.selectAll('g.vertex').filter(filter).data(vertices, fastEntityKey); // exit

            groups.exit().remove(); // enter

            var enter = groups.enter().append('g').attr('class', function (d) {
              return 'node vertex ' + d.id;
            }).order();
            enter.append('circle').attr('class', 'shadow');
            enter.append('circle').attr('class', 'stroke'); // Vertices with tags get a fill.

            enter.filter(function (d) {
              return d.hasInterestingTags();
            }).append('circle').attr('class', 'fill'); // update

            groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('sibling', function (d) {
              return d.id in sets.selected;
            }).classed('shared', function (d) {
              return graph.isShared(d);
            }).classed('endpoint', function (d) {
              return d.isEndpoint(graph);
            }).classed('added', function (d) {
              return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
            }).classed('moved', function (d) {
              return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
            }).classed('retagged', function (d) {
              return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
            }).call(updateAttributes); // Vertices with icons get a `use`.

            var iconUse = groups.selectAll('.icon').data(function data(d) {
              return zoom >= 17 && getIcon(d) ? [d] : [];
            }, fastEntityKey); // exit

            iconUse.exit().remove(); // enter

            iconUse.enter().append('use').attr('class', 'icon').attr('width', '11px').attr('height', '11px').attr('transform', 'translate(-5.5, -5.5)').attr('xlink:href', function (d) {
              var picon = getIcon(d);
              var isMaki = /^maki-/.test(picon);
              return '#' + picon + (isMaki ? '-11' : '');
            }); // Vertices with directions get viewfields

            var dgroups = groups.selectAll('.viewfieldgroup').data(function data(d) {
              return zoom >= 18 && getDirections(d) ? [d] : [];
            }, fastEntityKey); // exit

            dgroups.exit().remove(); // enter/update

            dgroups = dgroups.enter().insert('g', '.shadow').attr('class', 'viewfieldgroup').merge(dgroups);
            var viewfields = dgroups.selectAll('.viewfield').data(getDirections, function key(d) {
              return osmEntity.key(d);
            }); // exit

            viewfields.exit().remove(); // enter/update

            viewfields.enter().append('path').attr('class', 'viewfield').attr('d', 'M0,0H0').merge(viewfields).attr('marker-start', 'url(#ideditor-viewfield-marker' + (wireframe ? '-wireframe' : '') + ')').attr('transform', function (d) {
              return 'rotate(' + d + ')';
            });
          }

          function drawTargets(selection, graph, entities, filter) {
            var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
            var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
            var getTransform = svgPointTransform(projection).geojson;
            var activeID = context.activeID();
            var data = {
              targets: [],
              nopes: []
            };
            entities.forEach(function (node) {
              if (activeID === node.id) return; // draw no target on the activeID

              var vertexType = svgPassiveVertex(node, graph, activeID);

              if (vertexType !== 0) {
                // passive or adjacent - allow to connect
                data.targets.push({
                  type: 'Feature',
                  id: node.id,
                  properties: {
                    target: true,
                    entity: node
                  },
                  geometry: node.asGeoJSON()
                });
              } else {
                data.nopes.push({
                  type: 'Feature',
                  id: node.id + '-nope',
                  properties: {
                    nope: true,
                    target: true,
                    entity: node
                  },
                  geometry: node.asGeoJSON()
                });
              }
            }); // Targets allow hover and vertex snapping

            var targets = selection.selectAll('.vertex.target-allowed').filter(function (d) {
              return filter(d.properties.entity);
            }).data(data.targets, function key(d) {
              return d.id;
            }); // exit

            targets.exit().remove(); // enter/update

            targets.enter().append('circle').attr('r', function (d) {
              return _radii[d.id] || radiuses.shadow[3];
            }).merge(targets).attr('class', function (d) {
              return 'node vertex target target-allowed ' + targetClass + d.id;
            }).attr('transform', getTransform); // NOPE

            var nopes = selection.selectAll('.vertex.target-nope').filter(function (d) {
              return filter(d.properties.entity);
            }).data(data.nopes, function key(d) {
              return d.id;
            }); // exit

            nopes.exit().remove(); // enter/update

            nopes.enter().append('circle').attr('r', function (d) {
              return _radii[d.properties.entity.id] || radiuses.shadow[3];
            }).merge(nopes).attr('class', function (d) {
              return 'node vertex target target-nope ' + nopeClass + d.id;
            }).attr('transform', getTransform);
          } // Points can also render as vertices:
          // 1. in wireframe mode or
          // 2. at higher zooms if they have a direction


          function renderAsVertex(entity, graph, wireframe, zoom) {
            var geometry = entity.geometry(graph);
            return geometry === 'vertex' || geometry === 'point' && (wireframe || zoom >= 18 && entity.directions(graph, projection).length);
          }

          function isEditedNode(node, base, head) {
            var baseNode = base.entities[node.id];
            var headNode = head.entities[node.id];
            return !headNode || !baseNode || !fastDeepEqual(headNode.tags, baseNode.tags) || !fastDeepEqual(headNode.loc, baseNode.loc);
          }

          function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
            var results = {};
            var seenIds = {};

            function addChildVertices(entity) {
              // avoid redundant work and infinite recursion of circular relations
              if (seenIds[entity.id]) return;
              seenIds[entity.id] = true;
              var geometry = entity.geometry(graph);

              if (!context.features().isHiddenFeature(entity, graph, geometry)) {
                var i;

                if (entity.type === 'way') {
                  for (i = 0; i < entity.nodes.length; i++) {
                    var child = graph.hasEntity(entity.nodes[i]);

                    if (child) {
                      addChildVertices(child);
                    }
                  }
                } else if (entity.type === 'relation') {
                  for (i = 0; i < entity.members.length; i++) {
                    var member = graph.hasEntity(entity.members[i].id);

                    if (member) {
                      addChildVertices(member);
                    }
                  }
                } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
                  results[entity.id] = entity;
                }
              }
            }

            ids.forEach(function (id) {
              var entity = graph.hasEntity(id);
              if (!entity) return;

              if (entity.type === 'node') {
                if (renderAsVertex(entity, graph, wireframe, zoom)) {
                  results[entity.id] = entity;
                  graph.parentWays(entity).forEach(function (entity) {
                    addChildVertices(entity);
                  });
                }
              } else {
                // way, relation
                addChildVertices(entity);
              }
            });
            return results;
          }

          function drawVertices(selection, graph, entities, filter, extent, fullRedraw) {
            var wireframe = context.surface().classed('fill-wireframe');
            var visualDiff = context.surface().classed('highlight-edited');
            var zoom = geoScaleToZoom(projection.scale());
            var mode = context.mode();
            var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
            var base = context.history().base();
            var drawLayer = selection.selectAll('.layer-osm.points .points-group.vertices');
            var touchLayer = selection.selectAll('.layer-touch.points');

            if (fullRedraw) {
              _currPersistent = {};
              _radii = {};
            } // Collect important vertices from the `entities` list..
            // (during a partial redraw, it will not contain everything)


            for (var i = 0; i < entities.length; i++) {
              var entity = entities[i];
              var geometry = entity.geometry(graph);
              var keep = false; // a point that looks like a vertex..

              if (geometry === 'point' && renderAsVertex(entity, graph, wireframe, zoom)) {
                _currPersistent[entity.id] = entity;
                keep = true; // a vertex of some importance..
              } else if (geometry === 'vertex' && (entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || visualDiff && isEditedNode(entity, base, graph))) {
                _currPersistent[entity.id] = entity;
                keep = true;
              } // whatever this is, it's not a persistent vertex..


              if (!keep && !fullRedraw) {
                delete _currPersistent[entity.id];
              }
            } // 3 sets of vertices to consider:


            var sets = {
              persistent: _currPersistent,
              // persistent = important vertices (render always)
              selected: _currSelected,
              // selected + siblings of selected (render always)
              hovered: _currHover // hovered + siblings of hovered (render only in draw modes)

            };
            var all = Object.assign({}, isMoving ? _currHover : {}, _currSelected, _currPersistent); // Draw the vertices..
            // The filter function controls the scope of what objects d3 will touch (exit/enter/update)
            // Adjust the filter function to expand the scope beyond whatever entities were passed in.

            var filterRendered = function filterRendered(d) {
              return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
            };

            drawLayer.call(draw, graph, currentVisible(all), sets, filterRendered); // Draw touch targets..
            // When drawing, render all targets (not just those affected by a partial redraw)

            var filterTouch = function filterTouch(d) {
              return isMoving ? true : filterRendered(d);
            };

            touchLayer.call(drawTargets, graph, currentVisible(all), filterTouch);

            function currentVisible(which) {
              return Object.keys(which).map(graph.hasEntity, graph) // the current version of this entity
              .filter(function (entity) {
                return entity && entity.intersects(extent, graph);
              });
            }
          } // partial redraw - only update the selected items..


          drawVertices.drawSelected = function (selection, graph, extent) {
            var wireframe = context.surface().classed('fill-wireframe');
            var zoom = geoScaleToZoom(projection.scale());
            _prevSelected = _currSelected || {};

            if (context.map().isInWideSelection()) {
              _currSelected = {};
              context.selectedIDs().forEach(function (id) {
                var entity = graph.hasEntity(id);
                if (!entity) return;

                if (entity.type === 'node') {
                  if (renderAsVertex(entity, graph, wireframe, zoom)) {
                    _currSelected[entity.id] = entity;
                  }
                }
              });
            } else {
              _currSelected = getSiblingAndChildVertices(context.selectedIDs(), graph, wireframe, zoom);
            } // note that drawVertices will add `_currSelected` automatically if needed..


            var filter = function filter(d) {
              return d.id in _prevSelected;
            };

            drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
          }; // partial redraw - only update the hovered items..


          drawVertices.drawHover = function (selection, graph, target, extent) {
            if (target === _currHoverTarget) return; // continue only if something changed

            var wireframe = context.surface().classed('fill-wireframe');
            var zoom = geoScaleToZoom(projection.scale());
            _prevHover = _currHover || {};
            _currHoverTarget = target;
            var entity = target && target.properties && target.properties.entity;

            if (entity) {
              _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
            } else {
              _currHover = {};
            } // note that drawVertices will add `_currHover` automatically if needed..


            var filter = function filter(d) {
              return d.id in _prevHover;
            };

            drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
          };

          return drawVertices;
        }

        function utilBindOnce(target, type, listener, capture) {
          var typeOnce = type + '.once';

          function one() {
            target.on(typeOnce, null);
            listener.apply(this, arguments);
          }

          target.on(typeOnce, one, capture);
          return this;
        }

        function defaultFilter(d3_event) {
          return !d3_event.ctrlKey && !d3_event.button;
        }

        function defaultExtent() {
          var e = this;

          if (e instanceof SVGElement) {
            e = e.ownerSVGElement || e;

            if (e.hasAttribute('viewBox')) {
              e = e.viewBox.baseVal;
              return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
            }

            return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
          }

          return [[0, 0], [e.clientWidth, e.clientHeight]];
        }

        function defaultWheelDelta(d3_event) {
          return -d3_event.deltaY * (d3_event.deltaMode === 1 ? 0.05 : d3_event.deltaMode ? 1 : 0.002);
        }

        function defaultConstrain(transform, extent, translateExtent) {
          var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
              dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
              dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
              dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
          return transform.translate(dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1), dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1));
        }

        function utilZoomPan() {
          var filter = defaultFilter,
              extent = defaultExtent,
              constrain = defaultConstrain,
              wheelDelta = defaultWheelDelta,
              scaleExtent = [0, Infinity],
              translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
              interpolate = interpolateZoom,
              dispatch = dispatch$8('start', 'zoom', 'end'),
              _wheelDelay = 150,
              _transform = identity$2,
              _activeGesture;

          function zoom(selection) {
            selection.on('pointerdown.zoom', pointerdown).on('wheel.zoom', wheeled).style('touch-action', 'none').style('-webkit-tap-highlight-color', 'rgba(0,0,0,0)');
            select(window).on('pointermove.zoompan', pointermove).on('pointerup.zoompan pointercancel.zoompan', pointerup);
          }

          zoom.transform = function (collection, transform, point) {
            var selection = collection.selection ? collection.selection() : collection;

            if (collection !== selection) {
              schedule(collection, transform, point);
            } else {
              selection.interrupt().each(function () {
                gesture(this, arguments).start(null).zoom(null, null, typeof transform === 'function' ? transform.apply(this, arguments) : transform).end(null);
              });
            }
          };

          zoom.scaleBy = function (selection, k, p) {
            zoom.scaleTo(selection, function () {
              var k0 = _transform.k,
                  k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
              return k0 * k1;
            }, p);
          };

          zoom.scaleTo = function (selection, k, p) {
            zoom.transform(selection, function () {
              var e = extent.apply(this, arguments),
                  t0 = _transform,
                  p0 = !p ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p,
                  p1 = t0.invert(p0),
                  k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
              return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
            }, p);
          };

          zoom.translateBy = function (selection, x, y) {
            zoom.transform(selection, function () {
              return constrain(_transform.translate(typeof x === 'function' ? x.apply(this, arguments) : x, typeof y === 'function' ? y.apply(this, arguments) : y), extent.apply(this, arguments), translateExtent);
            });
          };

          zoom.translateTo = function (selection, x, y, p) {
            zoom.transform(selection, function () {
              var e = extent.apply(this, arguments),
                  t = _transform,
                  p0 = !p ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p;
              return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(typeof x === 'function' ? -x.apply(this, arguments) : -x, typeof y === 'function' ? -y.apply(this, arguments) : -y), e, translateExtent);
            }, p);
          };

          function scale(transform, k) {
            k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
            return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
          }

          function translate(transform, p0, p1) {
            var x = p0[0] - p1[0] * transform.k,
                y = p0[1] - p1[1] * transform.k;
            return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
          }

          function centroid(extent) {
            return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
          }

          function schedule(transition, transform, point) {
            transition.on('start.zoom', function () {
              gesture(this, arguments).start(null);
            }).on('interrupt.zoom end.zoom', function () {
              gesture(this, arguments).end(null);
            }).tween('zoom', function () {
              var that = this,
                  args = arguments,
                  g = gesture(that, args),
                  e = extent.apply(that, args),
                  p = !point ? centroid(e) : typeof point === 'function' ? point.apply(that, args) : point,
                  w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
                  a = _transform,
                  b = typeof transform === 'function' ? transform.apply(that, args) : transform,
                  i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
              return function (t) {
                if (t === 1) {
                  // Avoid rounding error on end.
                  t = b;
                } else {
                  var l = i(t);
                  var k = w / l[2];
                  t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
                }

                g.zoom(null, null, t);
              };
            });
          }

          function gesture(that, args, clean) {
            return !clean && _activeGesture || new Gesture(that, args);
          }

          function Gesture(that, args) {
            this.that = that;
            this.args = args;
            this.active = 0;
            this.extent = extent.apply(that, args);
          }

          Gesture.prototype = {
            start: function start(d3_event) {
              if (++this.active === 1) {
                _activeGesture = this;
                dispatch.call('start', this, d3_event);
              }

              return this;
            },
            zoom: function zoom(d3_event, key, transform) {
              if (this.mouse && key !== 'mouse') this.mouse[1] = transform.invert(this.mouse[0]);
              if (this.pointer0 && key !== 'touch') this.pointer0[1] = transform.invert(this.pointer0[0]);
              if (this.pointer1 && key !== 'touch') this.pointer1[1] = transform.invert(this.pointer1[0]);
              _transform = transform;
              dispatch.call('zoom', this, d3_event, key, transform);
              return this;
            },
            end: function end(d3_event) {
              if (--this.active === 0) {
                _activeGesture = null;
                dispatch.call('end', this, d3_event);
              }

              return this;
            }
          };

          function wheeled(d3_event) {
            if (!filter.apply(this, arguments)) return;
            var g = gesture(this, arguments),
                t = _transform,
                k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
                p = utilFastMouse(this)(d3_event); // If the mouse is in the same location as before, reuse it.
            // If there were recent wheel events, reset the wheel idle timeout.

            if (g.wheel) {
              if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
                g.mouse[1] = t.invert(g.mouse[0] = p);
              }

              clearTimeout(g.wheel); // Otherwise, capture the mouse point and location at the start.
            } else {
              g.mouse = [p, t.invert(p)];
              interrupt(this);
              g.start(d3_event);
            }

            d3_event.preventDefault();
            d3_event.stopImmediatePropagation();
            g.wheel = setTimeout(wheelidled, _wheelDelay);
            g.zoom(d3_event, 'mouse', constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));

            function wheelidled() {
              g.wheel = null;
              g.end(d3_event);
            }
          }

          var _downPointerIDs = new Set();

          var _pointerLocGetter;

          function pointerdown(d3_event) {
            _downPointerIDs.add(d3_event.pointerId);

            if (!filter.apply(this, arguments)) return;
            var g = gesture(this, arguments, _downPointerIDs.size === 1);
            var started;
            d3_event.stopImmediatePropagation();
            _pointerLocGetter = utilFastMouse(this);

            var loc = _pointerLocGetter(d3_event);

            var p = [loc, _transform.invert(loc), d3_event.pointerId];

            if (!g.pointer0) {
              g.pointer0 = p;
              started = true;
            } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
              g.pointer1 = p;
            }

            if (started) {
              interrupt(this);
              g.start(d3_event);
            }
          }

          function pointermove(d3_event) {
            if (!_downPointerIDs.has(d3_event.pointerId)) return;
            if (!_activeGesture || !_pointerLocGetter) return;
            var g = gesture(this, arguments);
            var isPointer0 = g.pointer0 && g.pointer0[2] === d3_event.pointerId;
            var isPointer1 = !isPointer0 && g.pointer1 && g.pointer1[2] === d3_event.pointerId;

            if ((isPointer0 || isPointer1) && 'buttons' in d3_event && !d3_event.buttons) {
              // The pointer went up without ending the gesture somehow, e.g.
              // a down mouse was moved off the map and released. End it here.
              if (g.pointer0) _downPointerIDs["delete"](g.pointer0[2]);
              if (g.pointer1) _downPointerIDs["delete"](g.pointer1[2]);
              g.end(d3_event);
              return;
            }

            d3_event.preventDefault();
            d3_event.stopImmediatePropagation();

            var loc = _pointerLocGetter(d3_event);

            var t, p, l;
            if (isPointer0) g.pointer0[0] = loc;else if (isPointer1) g.pointer1[0] = loc;
            t = _transform;

            if (g.pointer1) {
              var p0 = g.pointer0[0],
                  l0 = g.pointer0[1],
                  p1 = g.pointer1[0],
                  l1 = g.pointer1[1],
                  dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
                  dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
              t = scale(t, Math.sqrt(dp / dl));
              p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
              l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
            } else if (g.pointer0) {
              p = g.pointer0[0];
              l = g.pointer0[1];
            } else {
              return;
            }

            g.zoom(d3_event, 'touch', constrain(translate(t, p, l), g.extent, translateExtent));
          }

          function pointerup(d3_event) {
            if (!_downPointerIDs.has(d3_event.pointerId)) return;

            _downPointerIDs["delete"](d3_event.pointerId);

            if (!_activeGesture) return;
            var g = gesture(this, arguments);
            d3_event.stopImmediatePropagation();
            if (g.pointer0 && g.pointer0[2] === d3_event.pointerId) delete g.pointer0;else if (g.pointer1 && g.pointer1[2] === d3_event.pointerId) delete g.pointer1;

            if (g.pointer1 && !g.pointer0) {
              g.pointer0 = g.pointer1;
              delete g.pointer1;
            }

            if (g.pointer0) {
              g.pointer0[1] = _transform.invert(g.pointer0[0]);
            } else {
              g.end(d3_event);
            }
          }

          zoom.wheelDelta = function (_) {
            return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
          };

          zoom.filter = function (_) {
            return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
          };

          zoom.extent = function (_) {
            return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
          };

          zoom.scaleExtent = function (_) {
            return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
          };

          zoom.translateExtent = function (_) {
            return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
          };

          zoom.constrain = function (_) {
            return arguments.length ? (constrain = _, zoom) : constrain;
          };

          zoom.interpolate = function (_) {
            return arguments.length ? (interpolate = _, zoom) : interpolate;
          };

          zoom._transform = function (_) {
            return arguments.length ? (_transform = _, zoom) : _transform;
          };

          return utilRebind(zoom, dispatch, 'on');
        }

        // if pointer events are supported. Falls back to default `dblclick` event.

        function utilDoubleUp() {
          var dispatch = dispatch$8('doubleUp');
          var _maxTimespan = 500; // milliseconds

          var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices

          var _pointer; // object representing the pointer that could trigger double up


          function pointerIsValidFor(loc) {
            // second pointerup must occur within a small timeframe after the first pointerdown
            return new Date().getTime() - _pointer.startTime <= _maxTimespan && // all pointer events must occur within a small distance of the first pointerdown
            geoVecLength(_pointer.startLoc, loc) <= _maxDistance;
          }

          function pointerdown(d3_event) {
            // ignore right-click
            if (d3_event.ctrlKey || d3_event.button === 2) return;
            var loc = [d3_event.clientX, d3_event.clientY]; // Don't rely on pointerId here since it can change between pointerdown
            // events on touch devices

            if (_pointer && !pointerIsValidFor(loc)) {
              // if this pointer is no longer valid, clear it so another can be started
              _pointer = undefined;
            }

            if (!_pointer) {
              _pointer = {
                startLoc: loc,
                startTime: new Date().getTime(),
                upCount: 0,
                pointerId: d3_event.pointerId
              };
            } else {
              // double down
              _pointer.pointerId = d3_event.pointerId;
            }
          }

          function pointerup(d3_event) {
            // ignore right-click
            if (d3_event.ctrlKey || d3_event.button === 2) return;
            if (!_pointer || _pointer.pointerId !== d3_event.pointerId) return;
            _pointer.upCount += 1;

            if (_pointer.upCount === 2) {
              // double up!
              var loc = [d3_event.clientX, d3_event.clientY];

              if (pointerIsValidFor(loc)) {
                var locInThis = utilFastMouse(this)(d3_event);
                dispatch.call('doubleUp', this, d3_event, locInThis);
              } // clear the pointer info in any case


              _pointer = undefined;
            }
          }

          function doubleUp(selection) {
            if ('PointerEvent' in window) {
              // dblclick isn't well supported on touch devices so manually use
              // pointer events if they're available
              selection.on('pointerdown.doubleUp', pointerdown).on('pointerup.doubleUp', pointerup);
            } else {
              // fallback to dblclick
              selection.on('dblclick.doubleUp', function (d3_event) {
                dispatch.call('doubleUp', this, d3_event, utilFastMouse(this)(d3_event));
              });
            }
          }

          doubleUp.off = function (selection) {
            selection.on('pointerdown.doubleUp', null).on('pointerup.doubleUp', null).on('dblclick.doubleUp', null);
          };

          return utilRebind(doubleUp, dispatch, 'on');
        }

        var TILESIZE = 256;
        var minZoom = 2;
        var maxZoom = 24;
        var kMin = geoZoomToScale(minZoom, TILESIZE);
        var kMax = geoZoomToScale(maxZoom, TILESIZE);

        function clamp$1(num, min, max) {
          return Math.max(min, Math.min(num, max));
        }

        function rendererMap(context) {
          var dispatch = dispatch$8('move', 'drawn', 'crossEditableZoom', 'hitMinZoom', 'changeHighlighting', 'changeAreaFill');
          var projection = context.projection;
          var curtainProjection = context.curtainProjection;
          var drawLayers;
          var drawPoints;
          var drawVertices;
          var drawLines;
          var drawAreas;
          var drawMidpoints;
          var drawLabels;

          var _selection = select(null);

          var supersurface = select(null);
          var wrapper = select(null);
          var surface = select(null);
          var _dimensions = [1, 1];
          var _dblClickZoomEnabled = true;
          var _redrawEnabled = true;

          var _gestureTransformStart;

          var _transformStart = projection.transform();

          var _transformLast;

          var _isTransformed = false;
          var _minzoom = 0;

          var _getMouseCoords;

          var _lastPointerEvent;

          var _lastWithinEditableZoom; // whether a pointerdown event started the zoom


          var _pointerDown = false; // use pointer events on supported platforms; fallback to mouse events

          var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom


          var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;

          var _zoomerPanner = _zoomerPannerFunction().scaleExtent([kMin, kMax]).interpolate(interpolate$1).filter(zoomEventFilter).on('zoom.map', zoomPan).on('start.map', function (d3_event) {
            _pointerDown = d3_event && (d3_event.type === 'pointerdown' || d3_event.sourceEvent && d3_event.sourceEvent.type === 'pointerdown');
          }).on('end.map', function () {
            _pointerDown = false;
          });

          var _doubleUpHandler = utilDoubleUp();

          var scheduleRedraw = throttle(redraw, 750); // var isRedrawScheduled = false;
          // var pendingRedrawCall;
          // function scheduleRedraw() {
          //     // Only schedule the redraw if one has not already been set.
          //     if (isRedrawScheduled) return;
          //     isRedrawScheduled = true;
          //     var that = this;
          //     var args = arguments;
          //     pendingRedrawCall = window.requestIdleCallback(function () {
          //         // Reset the boolean so future redraws can be set.
          //         isRedrawScheduled = false;
          //         redraw.apply(that, args);
          //     }, { timeout: 1400 });
          // }


          function cancelPendingRedraw() {
            scheduleRedraw.cancel(); // isRedrawScheduled = false;
            // window.cancelIdleCallback(pendingRedrawCall);
          }

          function map(selection) {
            _selection = selection;
            context.on('change.map', immediateRedraw);
            var osm = context.connection();

            if (osm) {
              osm.on('change.map', immediateRedraw);
            }

            function didUndoOrRedo(targetTransform) {
              var mode = context.mode().id;
              if (mode !== 'browse' && mode !== 'select') return;

              if (targetTransform) {
                map.transformEase(targetTransform);
              }
            }

            context.history().on('merge.map', function () {
              scheduleRedraw();
            }).on('change.map', immediateRedraw).on('undone.map', function (stack, fromStack) {
              didUndoOrRedo(fromStack.transform);
            }).on('redone.map', function (stack) {
              didUndoOrRedo(stack.transform);
            });
            context.background().on('change.map', immediateRedraw);
            context.features().on('redraw.map', immediateRedraw);
            drawLayers.on('change.map', function () {
              context.background().updateImagery();
              immediateRedraw();
            });
            selection.on('wheel.map mousewheel.map', function (d3_event) {
              // disable swipe-to-navigate browser pages on trackpad/magic mouse – #5552
              d3_event.preventDefault();
            }).call(_zoomerPanner).call(_zoomerPanner.transform, projection.transform()).on('dblclick.zoom', null); // override d3-zoom dblclick handling

            map.supersurface = supersurface = selection.append('div').attr('class', 'supersurface').call(utilSetTransform, 0, 0); // Need a wrapper div because Opera can't cope with an absolutely positioned
            // SVG element: http://bl.ocks.org/jfirebaugh/6fbfbd922552bf776c16

            wrapper = supersurface.append('div').attr('class', 'layer layer-data');
            map.surface = surface = wrapper.call(drawLayers).selectAll('.surface');
            surface.call(drawLabels.observe).call(_doubleUpHandler).on(_pointerPrefix + 'down.zoom', function (d3_event) {
              _lastPointerEvent = d3_event;

              if (d3_event.button === 2) {
                d3_event.stopPropagation();
              }
            }, true).on(_pointerPrefix + 'up.zoom', function (d3_event) {
              _lastPointerEvent = d3_event;

              if (resetTransform()) {
                immediateRedraw();
              }
            }).on(_pointerPrefix + 'move.map', function (d3_event) {
              _lastPointerEvent = d3_event;
            }).on(_pointerPrefix + 'over.vertices', function (d3_event) {
              if (map.editableDataEnabled() && !_isTransformed) {
                var hover = d3_event.target.__data__;
                surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
                dispatch.call('drawn', this, {
                  full: false
                });
              }
            }).on(_pointerPrefix + 'out.vertices', function (d3_event) {
              if (map.editableDataEnabled() && !_isTransformed) {
                var hover = d3_event.relatedTarget && d3_event.relatedTarget.__data__;
                surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
                dispatch.call('drawn', this, {
                  full: false
                });
              }
            });
            var detected = utilDetect(); // only WebKit supports gesture events

            if ('GestureEvent' in window && // Listening for gesture events on iOS 13.4+ breaks double-tapping,
            // but we only need to do this on desktop Safari anyway. – #7694
            !detected.isMobileWebKit) {
              // Desktop Safari sends gesture events for multitouch trackpad pinches.
              // We can listen for these and translate them into map zooms.
              surface.on('gesturestart.surface', function (d3_event) {
                d3_event.preventDefault();
                _gestureTransformStart = projection.transform();
              }).on('gesturechange.surface', gestureChange);
            } // must call after surface init


            updateAreaFill();

            _doubleUpHandler.on('doubleUp.map', function (d3_event, p0) {
              if (!_dblClickZoomEnabled) return; // don't zoom if targeting something other than the map itself

              if (_typeof(d3_event.target.__data__) === 'object' && // or area fills
              !select(d3_event.target).classed('fill')) return;
              var zoomOut = d3_event.shiftKey;
              var t = projection.transform();
              var p1 = t.invert(p0);
              t = t.scale(zoomOut ? 0.5 : 2);
              t.x = p0[0] - p1[0] * t.k;
              t.y = p0[1] - p1[1] * t.k;
              map.transformEase(t);
            });

            context.on('enter.map', function () {
              if (!map.editableDataEnabled(true
              /* skip zoom check */
              )) return;
              if (_isTransformed) return; // redraw immediately any objects affected by a change in selectedIDs.

              var graph = context.graph();
              var selectedAndParents = {};
              context.selectedIDs().forEach(function (id) {
                var entity = graph.hasEntity(id);

                if (entity) {
                  selectedAndParents[entity.id] = entity;

                  if (entity.type === 'node') {
                    graph.parentWays(entity).forEach(function (parent) {
                      selectedAndParents[parent.id] = parent;
                    });
                  }
                }
              });
              var data = Object.values(selectedAndParents);

              var filter = function filter(d) {
                return d.id in selectedAndParents;
              };

              data = context.features().filter(data, graph);
              surface.call(drawVertices.drawSelected, graph, map.extent()).call(drawLines, graph, data, filter).call(drawAreas, graph, data, filter).call(drawMidpoints, graph, data, filter, map.trimmedExtent());
              dispatch.call('drawn', this, {
                full: false
              }); // redraw everything else later

              scheduleRedraw();
            });
            map.dimensions(utilGetDimensions(selection));
          }

          function zoomEventFilter(d3_event) {
            // Fix for #2151, (see also d3/d3-zoom#60, d3/d3-brush#18)
            // Intercept `mousedown` and check if there is an orphaned zoom gesture.
            // This can happen if a previous `mousedown` occurred without a `mouseup`.
            // If we detect this, dispatch `mouseup` to complete the orphaned gesture,
            // so that d3-zoom won't stop propagation of new `mousedown` events.
            if (d3_event.type === 'mousedown') {
              var hasOrphan = false;
              var listeners = window.__on;

              for (var i = 0; i < listeners.length; i++) {
                var listener = listeners[i];

                if (listener.name === 'zoom' && listener.type === 'mouseup') {
                  hasOrphan = true;
                  break;
                }
              }

              if (hasOrphan) {
                var event = window.CustomEvent;

                if (event) {
                  event = new event('mouseup');
                } else {
                  event = window.document.createEvent('Event');
                  event.initEvent('mouseup', false, false);
                } // Event needs to be dispatched with an event.view property.


                event.view = window;
                window.dispatchEvent(event);
              }
            }

            return d3_event.button !== 2; // ignore right clicks
          }

          function pxCenter() {
            return [_dimensions[0] / 2, _dimensions[1] / 2];
          }

          function drawEditable(difference, extent) {
            var mode = context.mode();
            var graph = context.graph();
            var features = context.features();
            var all = context.history().intersects(map.extent());
            var fullRedraw = false;
            var data;
            var set;
            var filter;
            var applyFeatureLayerFilters = true;

            if (map.isInWideSelection()) {
              data = [];
              utilEntityAndDeepMemberIDs(mode.selectedIDs(), context.graph()).forEach(function (id) {
                var entity = context.hasEntity(id);
                if (entity) data.push(entity);
              });
              fullRedraw = true;
              filter = utilFunctor(true); // selected features should always be visible, so we can skip filtering

              applyFeatureLayerFilters = false;
            } else if (difference) {
              var complete = difference.complete(map.extent());
              data = Object.values(complete).filter(Boolean);
              set = new Set(Object.keys(complete));

              filter = function filter(d) {
                return set.has(d.id);
              };

              features.clear(data);
            } else {
              // force a full redraw if gatherStats detects that a feature
              // should be auto-hidden (e.g. points or buildings)..
              if (features.gatherStats(all, graph, _dimensions)) {
                extent = undefined;
              }

              if (extent) {
                data = context.history().intersects(map.extent().intersection(extent));
                set = new Set(data.map(function (entity) {
                  return entity.id;
                }));

                filter = function filter(d) {
                  return set.has(d.id);
                };
              } else {
                data = all;
                fullRedraw = true;
                filter = utilFunctor(true);
              }
            }

            if (applyFeatureLayerFilters) {
              data = features.filter(data, graph);
            } else {
              context.features().resetStats();
            }

            if (mode && mode.id === 'select') {
              // update selected vertices - the user might have just double-clicked a way,
              // creating a new vertex, triggering a partial redraw without a mode change
              surface.call(drawVertices.drawSelected, graph, map.extent());
            }

            surface.call(drawVertices, graph, data, filter, map.extent(), fullRedraw).call(drawLines, graph, data, filter).call(drawAreas, graph, data, filter).call(drawMidpoints, graph, data, filter, map.trimmedExtent()).call(drawLabels, graph, data, filter, _dimensions, fullRedraw).call(drawPoints, graph, data, filter);
            dispatch.call('drawn', this, {
              full: true
            });
          }

          map.init = function () {
            drawLayers = svgLayers(projection, context);
            drawPoints = svgPoints(projection, context);
            drawVertices = svgVertices(projection, context);
            drawLines = svgLines(projection, context);
            drawAreas = svgAreas(projection, context);
            drawMidpoints = svgMidpoints(projection, context);
            drawLabels = svgLabels(projection, context);
          };

          function editOff() {
            context.features().resetStats();
            surface.selectAll('.layer-osm *').remove();
            surface.selectAll('.layer-touch:not(.markers) *').remove();
            var allowed = {
              'browse': true,
              'save': true,
              'select-note': true,
              'select-data': true,
              'select-error': true
            };
            var mode = context.mode();

            if (mode && !allowed[mode.id]) {
              context.enter(modeBrowse(context));
            }

            dispatch.call('drawn', this, {
              full: true
            });
          }

          function gestureChange(d3_event) {
            // Remap Safari gesture events to wheel events - #5492
            // We want these disabled most places, but enabled for zoom/unzoom on map surface
            // https://developer.mozilla.org/en-US/docs/Web/API/GestureEvent
            var e = d3_event;
            e.preventDefault();
            var props = {
              deltaMode: 0,
              // dummy values to ignore in zoomPan
              deltaY: 1,
              // dummy values to ignore in zoomPan
              clientX: e.clientX,
              clientY: e.clientY,
              screenX: e.screenX,
              screenY: e.screenY,
              x: e.x,
              y: e.y
            };
            var e2 = new WheelEvent('wheel', props);
            e2._scale = e.scale; // preserve the original scale

            e2._rotation = e.rotation; // preserve the original rotation

            _selection.node().dispatchEvent(e2);
          }

          function zoomPan(event, key, transform) {
            var source = event && event.sourceEvent || event;
            var eventTransform = transform || event && event.transform;
            var x = eventTransform.x;
            var y = eventTransform.y;
            var k = eventTransform.k; // Special handling of 'wheel' events:
            // They might be triggered by the user scrolling the mouse wheel,
            // or 2-finger pinch/zoom gestures, the transform may need adjustment.

            if (source && source.type === 'wheel') {
              // assume that the gesture is already handled by pointer events
              if (_pointerDown) return;
              var detected = utilDetect();
              var dX = source.deltaX;
              var dY = source.deltaY;
              var x2 = x;
              var y2 = y;
              var k2 = k;
              var t0, p0, p1; // Normalize mousewheel scroll speed (Firefox) - #3029
              // If wheel delta is provided in LINE units, recalculate it in PIXEL units
              // We are essentially redoing the calculations that occur here:
              //   https://github.com/d3/d3-zoom/blob/78563a8348aa4133b07cac92e2595c2227ca7cd7/src/zoom.js#L203
              // See this for more info:
              //   https://github.com/basilfx/normalize-wheel/blob/master/src/normalizeWheel.js

              if (source.deltaMode === 1
              /* LINE */
              ) {
                  // Convert from lines to pixels, more if the user is scrolling fast.
                  // (I made up the exp function to roughly match Firefox to what Chrome does)
                  // These numbers should be floats, because integers are treated as pan gesture below.
                  var lines = Math.abs(source.deltaY);
                  var sign = source.deltaY > 0 ? 1 : -1;
                  dY = sign * clamp$1(Math.exp((lines - 1) * 0.75) * 4.000244140625, 4.000244140625, // min
                  350.000244140625 // max
                  ); // On Firefox Windows and Linux we always get +/- the scroll line amount (default 3)
                  // There doesn't seem to be any scroll acceleration.
                  // This multiplier increases the speed a little bit - #5512

                  if (detected.os !== 'mac') {
                    dY *= 5;
                  } // recalculate x2,y2,k2


                  t0 = _isTransformed ? _transformLast : _transformStart;
                  p0 = _getMouseCoords(source);
                  p1 = t0.invert(p0);
                  k2 = t0.k * Math.pow(2, -dY / 500);
                  k2 = clamp$1(k2, kMin, kMax);
                  x2 = p0[0] - p1[0] * k2;
                  y2 = p0[1] - p1[1] * k2; // 2 finger map pinch zooming (Safari) - #5492
                  // These are fake `wheel` events we made from Safari `gesturechange` events..
                } else if (source._scale) {
                // recalculate x2,y2,k2
                t0 = _gestureTransformStart;
                p0 = _getMouseCoords(source);
                p1 = t0.invert(p0);
                k2 = t0.k * source._scale;
                k2 = clamp$1(k2, kMin, kMax);
                x2 = p0[0] - p1[0] * k2;
                y2 = p0[1] - p1[1] * k2; // 2 finger map pinch zooming (all browsers except Safari) - #5492
                // Pinch zooming via the `wheel` event will always have:
                // - `ctrlKey = true`
                // - `deltaY` is not round integer pixels (ignore `deltaX`)
              } else if (source.ctrlKey && !isInteger(dY)) {
                dY *= 6; // slightly scale up whatever the browser gave us
                // recalculate x2,y2,k2

                t0 = _isTransformed ? _transformLast : _transformStart;
                p0 = _getMouseCoords(source);
                p1 = t0.invert(p0);
                k2 = t0.k * Math.pow(2, -dY / 500);
                k2 = clamp$1(k2, kMin, kMax);
                x2 = p0[0] - p1[0] * k2;
                y2 = p0[1] - p1[1] * k2; // Trackpad scroll zooming with shift or alt/option key down
              } else if ((source.altKey || source.shiftKey) && isInteger(dY)) {
                // recalculate x2,y2,k2
                t0 = _isTransformed ? _transformLast : _transformStart;
                p0 = _getMouseCoords(source);
                p1 = t0.invert(p0);
                k2 = t0.k * Math.pow(2, -dY / 500);
                k2 = clamp$1(k2, kMin, kMax);
                x2 = p0[0] - p1[0] * k2;
                y2 = p0[1] - p1[1] * k2; // 2 finger map panning (Mac only, all browsers except Firefox #8595) - #5492, #5512
                // Panning via the `wheel` event will always have:
                // - `ctrlKey = false`
                // - `deltaX`,`deltaY` are round integer pixels
              } else if (detected.os === 'mac' && detected.browser !== 'Firefox' && !source.ctrlKey && isInteger(dX) && isInteger(dY)) {
                p1 = projection.translate();
                x2 = p1[0] - dX;
                y2 = p1[1] - dY;
                k2 = projection.scale();
                k2 = clamp$1(k2, kMin, kMax);
              } // something changed - replace the event transform


              if (x2 !== x || y2 !== y || k2 !== k) {
                x = x2;
                y = y2;
                k = k2;
                eventTransform = identity$2.translate(x2, y2).scale(k2);

                if (_zoomerPanner._transform) {
                  // utilZoomPan interface
                  _zoomerPanner._transform(eventTransform);
                } else {
                  // d3_zoom interface
                  _selection.node().__zoom = eventTransform;
                }
              }
            }

            if (_transformStart.x === x && _transformStart.y === y && _transformStart.k === k) {
              return; // no change
            }

            if (geoScaleToZoom(k, TILESIZE) < _minzoom) {
              surface.interrupt();
              dispatch.call('hitMinZoom', this, map);
              setCenterZoom(map.center(), context.minEditableZoom(), 0, true);
              scheduleRedraw();
              dispatch.call('move', this, map);
              return;
            }

            projection.transform(eventTransform);
            var withinEditableZoom = map.withinEditableZoom();

            if (_lastWithinEditableZoom !== withinEditableZoom) {
              if (_lastWithinEditableZoom !== undefined) {
                // notify that the map zoomed in or out over the editable zoom threshold
                dispatch.call('crossEditableZoom', this, withinEditableZoom);
              }

              _lastWithinEditableZoom = withinEditableZoom;
            }

            var scale = k / _transformStart.k;
            var tX = (x / scale - _transformStart.x) * scale;
            var tY = (y / scale - _transformStart.y) * scale;

            if (context.inIntro()) {
              curtainProjection.transform({
                x: x - tX,
                y: y - tY,
                k: k
              });
            }

            if (source) {
              _lastPointerEvent = event;
            }

            _isTransformed = true;
            _transformLast = eventTransform;
            utilSetTransform(supersurface, tX, tY, scale);
            scheduleRedraw();
            dispatch.call('move', this, map);

            function isInteger(val) {
              return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
            }
          }

          function resetTransform() {
            if (!_isTransformed) return false;
            utilSetTransform(supersurface, 0, 0);
            _isTransformed = false;

            if (context.inIntro()) {
              curtainProjection.transform(projection.transform());
            }

            return true;
          }

          function redraw(difference, extent) {
            if (surface.empty() || !_redrawEnabled) return; // If we are in the middle of a zoom/pan, we can't do differenced redraws.
            // It would result in artifacts where differenced entities are redrawn with
            // one transform and unchanged entities with another.

            if (resetTransform()) {
              difference = extent = undefined;
            }

            var zoom = map.zoom();
            var z = String(~~zoom);

            if (surface.attr('data-zoom') !== z) {
              surface.attr('data-zoom', z);
            } // class surface as `lowzoom` around z17-z18.5 (based on latitude)


            var lat = map.center()[1];
            var lowzoom = linear().domain([-60, 0, 60]).range([17, 18.5, 17]).clamp(true);
            surface.classed('low-zoom', zoom <= lowzoom(lat));

            if (!difference) {
              supersurface.call(context.background());
              wrapper.call(drawLayers);
            } // OSM


            if (map.editableDataEnabled() || map.isInWideSelection()) {
              context.loadTiles(projection);
              drawEditable(difference, extent);
            } else {
              editOff();
            }

            _transformStart = projection.transform();
            return map;
          }

          var immediateRedraw = function immediateRedraw(difference, extent) {
            if (!difference && !extent) cancelPendingRedraw();
            redraw(difference, extent);
          };

          map.lastPointerEvent = function () {
            return _lastPointerEvent;
          };

          map.mouse = function (d3_event) {
            var event = d3_event || _lastPointerEvent;

            if (event) {
              var s;

              while (s = event.sourceEvent) {
                event = s;
              }

              return _getMouseCoords(event);
            }

            return null;
          }; // returns Lng/Lat


          map.mouseCoordinates = function () {
            var coord = map.mouse() || pxCenter();
            return projection.invert(coord);
          };

          map.dblclickZoomEnable = function (val) {
            if (!arguments.length) return _dblClickZoomEnabled;
            _dblClickZoomEnabled = val;
            return map;
          };

          map.redrawEnable = function (val) {
            if (!arguments.length) return _redrawEnabled;
            _redrawEnabled = val;
            return map;
          };

          map.isTransformed = function () {
            return _isTransformed;
          };

          function setTransform(t2, duration, force) {
            var t = projection.transform();
            if (!force && t2.k === t.k && t2.x === t.x && t2.y === t.y) return false;

            if (duration) {
              _selection.transition().duration(duration).on('start', function () {
                map.startEase();
              }).call(_zoomerPanner.transform, identity$2.translate(t2.x, t2.y).scale(t2.k));
            } else {
              projection.transform(t2);
              _transformStart = t2;

              _selection.call(_zoomerPanner.transform, _transformStart);
            }

            return true;
          }

          function setCenterZoom(loc2, z2, duration, force) {
            var c = map.center();
            var z = map.zoom();
            if (loc2[0] === c[0] && loc2[1] === c[1] && z2 === z && !force) return false;
            var proj = geoRawMercator().transform(projection.transform()); // copy projection

            var k2 = clamp$1(geoZoomToScale(z2, TILESIZE), kMin, kMax);
            proj.scale(k2);
            var t = proj.translate();
            var point = proj(loc2);
            var center = pxCenter();
            t[0] += center[0] - point[0];
            t[1] += center[1] - point[1];
            return setTransform(identity$2.translate(t[0], t[1]).scale(k2), duration, force);
          }

          map.pan = function (delta, duration) {
            var t = projection.translate();
            var k = projection.scale();
            t[0] += delta[0];
            t[1] += delta[1];

            if (duration) {
              _selection.transition().duration(duration).on('start', function () {
                map.startEase();
              }).call(_zoomerPanner.transform, identity$2.translate(t[0], t[1]).scale(k));
            } else {
              projection.translate(t);
              _transformStart = projection.transform();

              _selection.call(_zoomerPanner.transform, _transformStart);

              dispatch.call('move', this, map);
              immediateRedraw();
            }

            return map;
          };

          map.dimensions = function (val) {
            if (!arguments.length) return _dimensions;
            _dimensions = val;
            drawLayers.dimensions(_dimensions);
            context.background().dimensions(_dimensions);
            projection.clipExtent([[0, 0], _dimensions]);
            _getMouseCoords = utilFastMouse(supersurface.node());
            scheduleRedraw();
            return map;
          };

          function zoomIn(delta) {
            setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
          }

          function zoomOut(delta) {
            setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
          }

          map.zoomIn = function () {
            zoomIn(1);
          };

          map.zoomInFurther = function () {
            zoomIn(4);
          };

          map.canZoomIn = function () {
            return map.zoom() < maxZoom;
          };

          map.zoomOut = function () {
            zoomOut(1);
          };

          map.zoomOutFurther = function () {
            zoomOut(4);
          };

          map.canZoomOut = function () {
            return map.zoom() > minZoom;
          };

          map.center = function (loc2) {
            if (!arguments.length) {
              return projection.invert(pxCenter());
            }

            if (setCenterZoom(loc2, map.zoom())) {
              dispatch.call('move', this, map);
            }

            scheduleRedraw();
            return map;
          };

          map.unobscuredCenterZoomEase = function (loc, zoom) {
            var offset = map.unobscuredOffsetPx();
            var proj = geoRawMercator().transform(projection.transform()); // copy projection
            // use the target zoom to calculate the offset center

            proj.scale(geoZoomToScale(zoom, TILESIZE));
            var locPx = proj(loc);
            var offsetLocPx = [locPx[0] + offset[0], locPx[1] + offset[1]];
            var offsetLoc = proj.invert(offsetLocPx);
            map.centerZoomEase(offsetLoc, zoom);
          };

          map.unobscuredOffsetPx = function () {
            var openPane = context.container().select('.map-panes .map-pane.shown');

            if (!openPane.empty()) {
              return [openPane.node().offsetWidth / 2, 0];
            }

            return [0, 0];
          };

          map.zoom = function (z2) {
            if (!arguments.length) {
              return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
            }

            if (z2 < _minzoom) {
              surface.interrupt();
              dispatch.call('hitMinZoom', this, map);
              z2 = context.minEditableZoom();
            }

            if (setCenterZoom(map.center(), z2)) {
              dispatch.call('move', this, map);
            }

            scheduleRedraw();
            return map;
          };

          map.centerZoom = function (loc2, z2) {
            if (setCenterZoom(loc2, z2)) {
              dispatch.call('move', this, map);
            }

            scheduleRedraw();
            return map;
          };

          map.zoomTo = function (entity) {
            var extent = entity.extent(context.graph());
            if (!isFinite(extent.area())) return map;
            var z2 = clamp$1(map.trimmedExtentZoom(extent), 0, 20);
            return map.centerZoom(extent.center(), z2);
          };

          map.centerEase = function (loc2, duration) {
            duration = duration || 250;
            setCenterZoom(loc2, map.zoom(), duration);
            return map;
          };

          map.zoomEase = function (z2, duration) {
            duration = duration || 250;
            setCenterZoom(map.center(), z2, duration, false);
            return map;
          };

          map.centerZoomEase = function (loc2, z2, duration) {
            duration = duration || 250;
            setCenterZoom(loc2, z2, duration, false);
            return map;
          };

          map.transformEase = function (t2, duration) {
            duration = duration || 250;
            setTransform(t2, duration, false
            /* don't force */
            );
            return map;
          };

          map.zoomToEase = function (obj, duration) {
            var extent;

            if (Array.isArray(obj)) {
              obj.forEach(function (entity) {
                var entityExtent = entity.extent(context.graph());

                if (!extent) {
                  extent = entityExtent;
                } else {
                  extent = extent.extend(entityExtent);
                }
              });
            } else {
              extent = obj.extent(context.graph());
            }

            if (!isFinite(extent.area())) return map;
            var z2 = clamp$1(map.trimmedExtentZoom(extent), 0, 20);
            return map.centerZoomEase(extent.center(), z2, duration);
          };

          map.startEase = function () {
            utilBindOnce(surface, _pointerPrefix + 'down.ease', function () {
              map.cancelEase();
            });
            return map;
          };

          map.cancelEase = function () {
            _selection.interrupt();

            return map;
          };

          map.extent = function (val) {
            if (!arguments.length) {
              return new geoExtent(projection.invert([0, _dimensions[1]]), projection.invert([_dimensions[0], 0]));
            } else {
              var extent = geoExtent(val);
              map.centerZoom(extent.center(), map.extentZoom(extent));
            }
          };

          map.trimmedExtent = function (val) {
            if (!arguments.length) {
              var headerY = 71;
              var footerY = 30;
              var pad = 10;
              return new geoExtent(projection.invert([pad, _dimensions[1] - footerY - pad]), projection.invert([_dimensions[0] - pad, headerY + pad]));
            } else {
              var extent = geoExtent(val);
              map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
            }
          };

          function calcExtentZoom(extent, dim) {
            var tl = projection([extent[0][0], extent[1][1]]);
            var br = projection([extent[1][0], extent[0][1]]); // Calculate maximum zoom that fits extent

            var hFactor = (br[0] - tl[0]) / dim[0];
            var vFactor = (br[1] - tl[1]) / dim[1];
            var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
            var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
            var newZoom = map.zoom() - Math.max(hZoomDiff, vZoomDiff);
            return newZoom;
          }

          map.extentZoom = function (val) {
            return calcExtentZoom(geoExtent(val), _dimensions);
          };

          map.trimmedExtentZoom = function (val) {
            var trimY = 120;
            var trimX = 40;
            var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
            return calcExtentZoom(geoExtent(val), trimmed);
          };

          map.withinEditableZoom = function () {
            return map.zoom() >= context.minEditableZoom();
          };

          map.isInWideSelection = function () {
            return !map.withinEditableZoom() && context.selectedIDs().length;
          };

          map.editableDataEnabled = function (skipZoomCheck) {
            var layer = context.layers().layer('osm');
            if (!layer || !layer.enabled()) return false;
            return skipZoomCheck || map.withinEditableZoom();
          };

          map.notesEditable = function () {
            var layer = context.layers().layer('notes');
            if (!layer || !layer.enabled()) return false;
            return map.withinEditableZoom();
          };

          map.minzoom = function (val) {
            if (!arguments.length) return _minzoom;
            _minzoom = val;
            return map;
          };

          map.toggleHighlightEdited = function () {
            surface.classed('highlight-edited', !surface.classed('highlight-edited'));
            map.pan([0, 0]); // trigger a redraw

            dispatch.call('changeHighlighting', this);
          };

          map.areaFillOptions = ['wireframe', 'partial', 'full'];

          map.activeAreaFill = function (val) {
            if (!arguments.length) return corePreferences('area-fill') || 'partial';
            corePreferences('area-fill', val);

            if (val !== 'wireframe') {
              corePreferences('area-fill-toggle', val);
            }

            updateAreaFill();
            map.pan([0, 0]); // trigger a redraw

            dispatch.call('changeAreaFill', this);
            return map;
          };

          map.toggleWireframe = function () {
            var activeFill = map.activeAreaFill();

            if (activeFill === 'wireframe') {
              activeFill = corePreferences('area-fill-toggle') || 'partial';
            } else {
              activeFill = 'wireframe';
            }

            map.activeAreaFill(activeFill);
          };

          function updateAreaFill() {
            var activeFill = map.activeAreaFill();
            map.areaFillOptions.forEach(function (opt) {
              surface.classed('fill-' + opt, Boolean(opt === activeFill));
            });
          }

          map.layers = function () {
            return drawLayers;
          };

          map.doubleUpHandler = function () {
            return _doubleUpHandler;
          };

          return utilRebind(map, dispatch, 'on');
        }

        function rendererPhotos(context) {
          var dispatch = dispatch$8('change');
          var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'openstreetcam'];
          var _allPhotoTypes = ['flat', 'panoramic'];

          var _shownPhotoTypes = _allPhotoTypes.slice(); // shallow copy


          var _dateFilters = ['fromDate', 'toDate'];

          var _fromDate;

          var _toDate;

          var _usernames;

          function photos() {}

          function updateStorage() {
            if (window.mocha) return;
            var hash = utilStringQs(window.location.hash);
            var enabled = context.layers().all().filter(function (d) {
              return _layerIDs.indexOf(d.id) !== -1 && d.layer && d.layer.supported() && d.layer.enabled();
            }).map(function (d) {
              return d.id;
            });

            if (enabled.length) {
              hash.photo_overlay = enabled.join(',');
            } else {
              delete hash.photo_overlay;
            }

            window.location.replace('#' + utilQsString(hash, true));
          }

          photos.overlayLayerIDs = function () {
            return _layerIDs;
          };

          photos.allPhotoTypes = function () {
            return _allPhotoTypes;
          };

          photos.dateFilters = function () {
            return _dateFilters;
          };

          photos.dateFilterValue = function (val) {
            return val === _dateFilters[0] ? _fromDate : _toDate;
          };

          photos.setDateFilter = function (type, val, updateUrl) {
            // validate the date
            var date = val && new Date(val);

            if (date && !isNaN(date)) {
              val = date.toISOString().substr(0, 10);
            } else {
              val = null;
            }

            if (type === _dateFilters[0]) {
              _fromDate = val;

              if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
                _toDate = _fromDate;
              }
            }

            if (type === _dateFilters[1]) {
              _toDate = val;

              if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
                _fromDate = _toDate;
              }
            }

            dispatch.call('change', this);

            if (updateUrl) {
              var rangeString;

              if (_fromDate || _toDate) {
                rangeString = (_fromDate || '') + '_' + (_toDate || '');
              }

              setUrlFilterValue('photo_dates', rangeString);
            }
          };

          photos.setUsernameFilter = function (val, updateUrl) {
            if (val && typeof val === 'string') val = val.replace(/;/g, ',').split(',');

            if (val) {
              val = val.map(function (d) {
                return d.trim();
              }).filter(Boolean);

              if (!val.length) {
                val = null;
              }
            }

            _usernames = val;
            dispatch.call('change', this);

            if (updateUrl) {
              var hashString;

              if (_usernames) {
                hashString = _usernames.join(',');
              }

              setUrlFilterValue('photo_username', hashString);
            }
          };

          function setUrlFilterValue(property, val) {
            if (!window.mocha) {
              var hash = utilStringQs(window.location.hash);

              if (val) {
                if (hash[property] === val) return;
                hash[property] = val;
              } else {
                if (!(property in hash)) return;
                delete hash[property];
              }

              window.location.replace('#' + utilQsString(hash, true));
            }
          }

          function showsLayer(id) {
            var layer = context.layers().layer(id);
            return layer && layer.supported() && layer.enabled();
          }

          photos.shouldFilterByDate = function () {
            return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
          };

          photos.shouldFilterByPhotoType = function () {
            return showsLayer('mapillary') || showsLayer('streetside') && showsLayer('openstreetcam');
          };

          photos.shouldFilterByUsername = function () {
            return !showsLayer('mapillary') && showsLayer('openstreetcam') && !showsLayer('streetside');
          };

          photos.showsPhotoType = function (val) {
            if (!photos.shouldFilterByPhotoType()) return true;
            return _shownPhotoTypes.indexOf(val) !== -1;
          };

          photos.showsFlat = function () {
            return photos.showsPhotoType('flat');
          };

          photos.showsPanoramic = function () {
            return photos.showsPhotoType('panoramic');
          };

          photos.fromDate = function () {
            return _fromDate;
          };

          photos.toDate = function () {
            return _toDate;
          };

          photos.togglePhotoType = function (val) {
            var index = _shownPhotoTypes.indexOf(val);

            if (index !== -1) {
              _shownPhotoTypes.splice(index, 1);
            } else {
              _shownPhotoTypes.push(val);
            }

            dispatch.call('change', this);
            return photos;
          };

          photos.usernames = function () {
            return _usernames;
          };

          photos.init = function () {
            var hash = utilStringQs(window.location.hash);

            if (hash.photo_dates) {
              // expect format like `photo_dates=2019-01-01_2020-12-31`, but allow a couple different separators
              var parts = /^(.*)[–_](.*)$/g.exec(hash.photo_dates.trim());
              this.setDateFilter('fromDate', parts && parts.length >= 2 && parts[1], false);
              this.setDateFilter('toDate', parts && parts.length >= 3 && parts[2], false);
            }

            if (hash.photo_username) {
              this.setUsernameFilter(hash.photo_username, false);
            }

            if (hash.photo_overlay) {
              // support enabling photo layers by default via a URL parameter, e.g. `photo_overlay=openstreetcam;mapillary;streetside`
              var hashOverlayIDs = hash.photo_overlay.replace(/;/g, ',').split(',');
              hashOverlayIDs.forEach(function (id) {
                var layer = _layerIDs.indexOf(id) !== -1 && context.layers().layer(id);
                if (layer && !layer.enabled()) layer.enabled(true);
              });
            }

            if (hash.photo) {
              // support opening a photo via a URL parameter, e.g. `photo=mapillary-fztgSDtLpa08ohPZFZjeRQ`
              var photoIds = hash.photo.replace(/;/g, ',').split(',');
              var photoId = photoIds.length && photoIds[0].trim();
              var results = /(.*)\/(.*)/g.exec(photoId);

              if (results && results.length >= 3) {
                var serviceId = results[1];
                var photoKey = results[2];
                var service = services[serviceId];

                if (service && service.ensureViewerLoaded) {
                  // if we're showing a photo then make sure its layer is enabled too
                  var layer = _layerIDs.indexOf(serviceId) !== -1 && context.layers().layer(serviceId);
                  if (layer && !layer.enabled()) layer.enabled(true);
                  var baselineTime = Date.now();
                  service.on('loadedImages.rendererPhotos', function () {
                    // don't open the viewer if too much time has elapsed
                    if (Date.now() - baselineTime > 45000) {
                      service.on('loadedImages.rendererPhotos', null);
                      return;
                    }

                    if (!service.cachedImage(photoKey)) return;
                    service.on('loadedImages.rendererPhotos', null);
                    service.ensureViewerLoaded(context).then(function () {
                      service.selectImage(context, photoKey).showViewer(context);
                    });
                  });
                }
              }
            }

            context.layers().on('change.rendererPhotos', updateStorage);
          };

          return utilRebind(photos, dispatch, 'on');
        }

        function uiAccount(context) {
          var osm = context.connection();

          function update(selection) {
            if (!osm) return;

            if (!osm.authenticated()) {
              selection.selectAll('.userLink, .logoutLink').classed('hide', true);
              return;
            }

            osm.userDetails(function (err, details) {
              var userLink = selection.select('.userLink'),
                  logoutLink = selection.select('.logoutLink');
              userLink.html('');
              logoutLink.html('');
              if (err || !details) return;
              selection.selectAll('.userLink, .logoutLink').classed('hide', false); // Link

              var userLinkA = userLink.append('a').attr('href', osm.userURL(details.display_name)).attr('target', '_blank'); // Add thumbnail or dont

              if (details.image_url) {
                userLinkA.append('img').attr('class', 'icon pre-text user-icon').attr('src', details.image_url);
              } else {
                userLinkA.call(svgIcon('#iD-icon-avatar', 'pre-text light'));
              } // Add user name


              userLinkA.append('span').attr('class', 'label').html(details.display_name);
              logoutLink.append('a').attr('class', 'logout').attr('href', '#').html(_t.html('logout')).on('click.logout', function (d3_event) {
                d3_event.preventDefault();
                osm.logout();
              });
            });
          }

          return function (selection) {
            selection.append('li').attr('class', 'userLink').classed('hide', true);
            selection.append('li').attr('class', 'logoutLink').classed('hide', true);

            if (osm) {
              osm.on('change.account', function () {
                update(selection);
              });
              update(selection);
            }
          };
        }

        function uiAttribution(context) {
          var _selection = select(null);

          function render(selection, data, klass) {
            var div = selection.selectAll(".".concat(klass)).data([0]);
            div = div.enter().append('div').attr('class', klass).merge(div);
            var attributions = div.selectAll('.attribution').data(data, function (d) {
              return d.id;
            });
            attributions.exit().remove();
            attributions = attributions.enter().append('span').attr('class', 'attribution').each(function (d, i, nodes) {
              var attribution = select(nodes[i]);

              if (d.terms_html) {
                attribution.html(d.terms_html);
                return;
              }

              if (d.terms_url) {
                attribution = attribution.append('a').attr('href', d.terms_url).attr('target', '_blank');
              }

              var sourceID = d.id.replace(/\./g, '<TX_DOT>');
              var terms_text = _t("imagery.".concat(sourceID, ".attribution.text"), {
                "default": d.terms_text || d.id || d.name()
              });

              if (d.icon && !d.overlay) {
                attribution.append('img').attr('class', 'source-image').attr('src', d.icon);
              }

              attribution.append('span').attr('class', 'attribution-text').html(terms_text);
            }).merge(attributions);
            var copyright = attributions.selectAll('.copyright-notice').data(function (d) {
              var notice = d.copyrightNotices(context.map().zoom(), context.map().extent());
              return notice ? [notice] : [];
            });
            copyright.exit().remove();
            copyright = copyright.enter().append('span').attr('class', 'copyright-notice').merge(copyright);
            copyright.html(String);
          }

          function update() {
            var baselayer = context.background().baseLayerSource();

            _selection.call(render, baselayer ? [baselayer] : [], 'base-layer-attribution');

            var z = context.map().zoom();
            var overlays = context.background().overlayLayerSources() || [];

            _selection.call(render, overlays.filter(function (s) {
              return s.validZoom(z);
            }), 'overlay-layer-attribution');
          }

          return function (selection) {
            _selection = selection;
            context.background().on('change.attribution', update);
            context.map().on('move.attribution', throttle(update, 400, {
              leading: false
            }));
            update();
          };
        }

        function uiContributors(context) {
          var osm = context.connection(),
              debouncedUpdate = debounce(function () {
            update();
          }, 1000),
              limit = 4,
              hidden = false,
              wrap = select(null);

          function update() {
            if (!osm) return;
            var users = {},
                entities = context.history().intersects(context.map().extent());
            entities.forEach(function (entity) {
              if (entity && entity.user) users[entity.user] = true;
            });
            var u = Object.keys(users),
                subset = u.slice(0, u.length > limit ? limit - 1 : limit);
            wrap.html('').call(svgIcon('#iD-icon-nearby', 'pre-text light'));
            var userList = select(document.createElement('span'));
            userList.selectAll().data(subset).enter().append('a').attr('class', 'user-link').attr('href', function (d) {
              return osm.userURL(d);
            }).attr('target', '_blank').html(String);

            if (u.length > limit) {
              var count = select(document.createElement('span'));
              var othersNum = u.length - limit + 1;
              count.append('a').attr('target', '_blank').attr('href', function () {
                return osm.changesetsURL(context.map().center(), context.map().zoom());
              }).html(othersNum);
              wrap.append('span').html(_t.html('contributors.truncated_list', {
                n: othersNum,
                users: userList.html(),
                count: count.html()
              }));
            } else {
              wrap.append('span').html(_t.html('contributors.list', {
                users: userList.html()
              }));
            }

            if (!u.length) {
              hidden = true;
              wrap.transition().style('opacity', 0);
            } else if (hidden) {
              wrap.transition().style('opacity', 1);
            }
          }

          return function (selection) {
            if (!osm) return;
            wrap = selection;
            update();
            osm.on('loaded.contributors', debouncedUpdate);
            context.map().on('move.contributors', debouncedUpdate);
          };
        }

        var _popoverID = 0;
        function uiPopover(klass) {
          var _id = _popoverID++;

          var _anchorSelection = select(null);

          var popover = function popover(selection) {
            _anchorSelection = selection;
            selection.each(setup);
          };

          var _animation = utilFunctor(false);

          var _placement = utilFunctor('top'); // top, bottom, left, right


          var _alignment = utilFunctor('center'); // leading, center, trailing


          var _scrollContainer = utilFunctor(select(null));

          var _content;

          var _displayType = utilFunctor('');

          var _hasArrow = utilFunctor(true); // use pointer events on supported platforms; fallback to mouse events


          var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

          popover.displayType = function (val) {
            if (arguments.length) {
              _displayType = utilFunctor(val);
              return popover;
            } else {
              return _displayType;
            }
          };

          popover.hasArrow = function (val) {
            if (arguments.length) {
              _hasArrow = utilFunctor(val);
              return popover;
            } else {
              return _hasArrow;
            }
          };

          popover.placement = function (val) {
            if (arguments.length) {
              _placement = utilFunctor(val);
              return popover;
            } else {
              return _placement;
            }
          };

          popover.alignment = function (val) {
            if (arguments.length) {
              _alignment = utilFunctor(val);
              return popover;
            } else {
              return _alignment;
            }
          };

          popover.scrollContainer = function (val) {
            if (arguments.length) {
              _scrollContainer = utilFunctor(val);
              return popover;
            } else {
              return _scrollContainer;
            }
          };

          popover.content = function (val) {
            if (arguments.length) {
              _content = val;
              return popover;
            } else {
              return _content;
            }
          };

          popover.isShown = function () {
            var popoverSelection = _anchorSelection.select('.popover-' + _id);

            return !popoverSelection.empty() && popoverSelection.classed('in');
          };

          popover.show = function () {
            _anchorSelection.each(show);
          };

          popover.updateContent = function () {
            _anchorSelection.each(updateContent);
          };

          popover.hide = function () {
            _anchorSelection.each(hide);
          };

          popover.toggle = function () {
            _anchorSelection.each(toggle);
          };

          popover.destroy = function (selection, selector) {
            // by default, just destroy the current popover
            selector = selector || '.popover-' + _id;
            selection.on(_pointerPrefix + 'enter.popover', null).on(_pointerPrefix + 'leave.popover', null).on(_pointerPrefix + 'up.popover', null).on(_pointerPrefix + 'down.popover', null).on('click.popover', null).attr('title', function () {
              return this.getAttribute('data-original-title') || this.getAttribute('title');
            }).attr('data-original-title', null).selectAll(selector).remove();
          };

          popover.destroyAny = function (selection) {
            selection.call(popover.destroy, '.popover');
          };

          function setup() {
            var anchor = select(this);

            var animate = _animation.apply(this, arguments);

            var popoverSelection = anchor.selectAll('.popover-' + _id).data([0]);
            var enter = popoverSelection.enter().append('div').attr('class', 'popover popover-' + _id + ' ' + (klass ? klass : '')).classed('arrowed', _hasArrow.apply(this, arguments));
            enter.append('div').attr('class', 'popover-arrow');
            enter.append('div').attr('class', 'popover-inner');
            popoverSelection = enter.merge(popoverSelection);

            if (animate) {
              popoverSelection.classed('fade', true);
            }

            var display = _displayType.apply(this, arguments);

            if (display === 'hover') {
              var _lastNonMouseEnterTime;

              anchor.on(_pointerPrefix + 'enter.popover', function (d3_event) {
                if (d3_event.pointerType) {
                  if (d3_event.pointerType !== 'mouse') {
                    _lastNonMouseEnterTime = d3_event.timeStamp; // only allow hover behavior for mouse input

                    return;
                  } else if (_lastNonMouseEnterTime && d3_event.timeStamp - _lastNonMouseEnterTime < 1500) {
                    // HACK: iOS 13.4 sends an erroneous `mouse` type pointerenter
                    // event for non-mouse interactions right after sending
                    // the correct type pointerenter event. Workaround by discarding
                    // any mouse event that occurs immediately after a non-mouse event.
                    return;
                  }
                } // don't show if buttons are pressed, e.g. during click and drag of map


                if (d3_event.buttons !== 0) return;
                show.apply(this, arguments);
              }).on(_pointerPrefix + 'leave.popover', function () {
                hide.apply(this, arguments);
              }) // show on focus too for better keyboard navigation support
              .on('focus.popover', function () {
                show.apply(this, arguments);
              }).on('blur.popover', function () {
                hide.apply(this, arguments);
              });
            } else if (display === 'clickFocus') {
              anchor.on(_pointerPrefix + 'down.popover', function (d3_event) {
                d3_event.preventDefault();
                d3_event.stopPropagation();
              }).on(_pointerPrefix + 'up.popover', function (d3_event) {
                d3_event.preventDefault();
                d3_event.stopPropagation();
              }).on('click.popover', toggle);
              popoverSelection // This attribute lets the popover take focus
              .attr('tabindex', 0).on('blur.popover', function () {
                anchor.each(function () {
                  hide.apply(this, arguments);
                });
              });
            }
          }

          function show() {
            var anchor = select(this);
            var popoverSelection = anchor.selectAll('.popover-' + _id);

            if (popoverSelection.empty()) {
              // popover was removed somehow, put it back
              anchor.call(popover.destroy);
              anchor.each(setup);
              popoverSelection = anchor.selectAll('.popover-' + _id);
            }

            popoverSelection.classed('in', true);

            var displayType = _displayType.apply(this, arguments);

            if (displayType === 'clickFocus') {
              anchor.classed('active', true);
              popoverSelection.node().focus();
            }

            anchor.each(updateContent);
          }

          function updateContent() {
            var anchor = select(this);

            if (_content) {
              anchor.selectAll('.popover-' + _id + ' > .popover-inner').call(_content.apply(this, arguments));
            }

            updatePosition.apply(this, arguments); // hack: update multiple times to fix instances where the absolute offset is
            // set before the dynamic popover size is calculated by the browser

            updatePosition.apply(this, arguments);
            updatePosition.apply(this, arguments);
          }

          function updatePosition() {
            var anchor = select(this);
            var popoverSelection = anchor.selectAll('.popover-' + _id);

            var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);

            var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
            var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
            var scrollTop = scrollNode ? scrollNode.scrollTop : 0;

            var placement = _placement.apply(this, arguments);

            popoverSelection.classed('left', false).classed('right', false).classed('top', false).classed('bottom', false).classed(placement, true);

            var alignment = _alignment.apply(this, arguments);

            var alignFactor = 0.5;

            if (alignment === 'leading') {
              alignFactor = 0;
            } else if (alignment === 'trailing') {
              alignFactor = 1;
            }

            var anchorFrame = getFrame(anchor.node());
            var popoverFrame = getFrame(popoverSelection.node());
            var position;

            switch (placement) {
              case 'top':
                position = {
                  x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
                  y: anchorFrame.y - popoverFrame.h
                };
                break;

              case 'bottom':
                position = {
                  x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
                  y: anchorFrame.y + anchorFrame.h
                };
                break;

              case 'left':
                position = {
                  x: anchorFrame.x - popoverFrame.w,
                  y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
                };
                break;

              case 'right':
                position = {
                  x: anchorFrame.x + anchorFrame.w,
                  y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
                };
                break;
            }

            if (position) {
              if (scrollNode && (placement === 'top' || placement === 'bottom')) {
                var initialPosX = position.x;

                if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
                  position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
                } else if (position.x < 10) {
                  position.x = 10;
                }

                var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow'); // keep the arrow centered on the button, or as close as possible

                var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
                arrow.style('left', ~~arrowPosX + 'px');
              }

              popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
            } else {
              popoverSelection.style('left', null).style('top', null);
            }

            function getFrame(node) {
              var positionStyle = select(node).style('position');

              if (positionStyle === 'absolute' || positionStyle === 'static') {
                return {
                  x: node.offsetLeft - scrollLeft,
                  y: node.offsetTop - scrollTop,
                  w: node.offsetWidth,
                  h: node.offsetHeight
                };
              } else {
                return {
                  x: 0,
                  y: 0,
                  w: node.offsetWidth,
                  h: node.offsetHeight
                };
              }
            }
          }

          function hide() {
            var anchor = select(this);

            if (_displayType.apply(this, arguments) === 'clickFocus') {
              anchor.classed('active', false);
            }

            anchor.selectAll('.popover-' + _id).classed('in', false);
          }

          function toggle() {
            if (select(this).select('.popover-' + _id).classed('in')) {
              hide.apply(this, arguments);
            } else {
              show.apply(this, arguments);
            }
          }

          return popover;
        }

        function uiTooltip(klass) {
          var tooltip = uiPopover((klass || '') + ' tooltip').displayType('hover');

          var _title = function _title() {
            var title = this.getAttribute('data-original-title');

            if (title) {
              return title;
            } else {
              title = this.getAttribute('title');
              this.removeAttribute('title');
              this.setAttribute('data-original-title', title);
            }

            return title;
          };

          var _heading = utilFunctor(null);

          var _keys = utilFunctor(null);

          tooltip.title = function (val) {
            if (!arguments.length) return _title;
            _title = utilFunctor(val);
            return tooltip;
          };

          tooltip.heading = function (val) {
            if (!arguments.length) return _heading;
            _heading = utilFunctor(val);
            return tooltip;
          };

          tooltip.keys = function (val) {
            if (!arguments.length) return _keys;
            _keys = utilFunctor(val);
            return tooltip;
          };

          tooltip.content(function () {
            var heading = _heading.apply(this, arguments);

            var text = _title.apply(this, arguments);

            var keys = _keys.apply(this, arguments);

            return function (selection) {
              var headingSelect = selection.selectAll('.tooltip-heading').data(heading ? [heading] : []);
              headingSelect.exit().remove();
              headingSelect.enter().append('div').attr('class', 'tooltip-heading').merge(headingSelect).html(heading);
              var textSelect = selection.selectAll('.tooltip-text').data(text ? [text] : []);
              textSelect.exit().remove();
              textSelect.enter().append('div').attr('class', 'tooltip-text').merge(textSelect).html(text);
              var keyhintWrap = selection.selectAll('.keyhint-wrap').data(keys && keys.length ? [0] : []);
              keyhintWrap.exit().remove();
              var keyhintWrapEnter = keyhintWrap.enter().append('div').attr('class', 'keyhint-wrap');
              keyhintWrapEnter.append('span').html(_t.html('tooltip_keyhint'));
              keyhintWrap = keyhintWrapEnter.merge(keyhintWrap);
              keyhintWrap.selectAll('kbd.shortcut').data(keys && keys.length ? keys : []).enter().append('kbd').attr('class', 'shortcut').html(function (d) {
                return d;
              });
            };
          });
          return tooltip;
        }

        function uiEditMenu(context) {
          var dispatch = dispatch$8('toggled');

          var _menu = select(null);

          var _operations = []; // the position the menu should be displayed relative to

          var _anchorLoc = [0, 0];
          var _anchorLocLonLat = [0, 0]; // a string indicating how the menu was opened

          var _triggerType = '';
          var _vpTopMargin = 85; // viewport top margin

          var _vpBottomMargin = 45; // viewport bottom margin

          var _vpSideMargin = 35; // viewport side margin

          var _menuTop = false;

          var _menuHeight;

          var _menuWidth; // hardcode these values to make menu positioning easier


          var _verticalPadding = 4; // see also `.edit-menu .tooltip` CSS; include margin

          var _tooltipWidth = 210; // offset the menu slightly from the target location

          var _menuSideMargin = 10;
          var _tooltips = [];

          var editMenu = function editMenu(selection) {
            var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');

            var ops = _operations.filter(function (op) {
              return !isTouchMenu || !op.mouseOnly;
            });

            if (!ops.length) return;
            _tooltips = []; // Position the menu above the anchor for stylus and finger input
            // since the mapper's hand likely obscures the screen below the anchor

            _menuTop = isTouchMenu; // Show labels for touch input since there aren't hover tooltips

            var showLabels = isTouchMenu;
            var buttonHeight = showLabels ? 32 : 34;

            if (showLabels) {
              // Get a general idea of the width based on the length of the label
              _menuWidth = 52 + Math.min(120, 6 * Math.max.apply(Math, ops.map(function (op) {
                return op.title.length;
              })));
            } else {
              _menuWidth = 44;
            }

            _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
            _menu = selection.append('div').attr('class', 'edit-menu').classed('touch-menu', isTouchMenu).style('padding', _verticalPadding + 'px 0');

            var buttons = _menu.selectAll('.edit-menu-item').data(ops); // enter


            var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
              return 'edit-menu-item edit-menu-item-' + d.id;
            }).style('height', buttonHeight + 'px').on('click', click) // don't listen for `mouseup` because we only care about non-mouse pointer types
            .on('pointerup', pointerup).on('pointerdown mousedown', function pointerdown(d3_event) {
              // don't let button presses also act as map input - #1869
              d3_event.stopPropagation();
            }).on('mouseenter.highlight', function (d3_event, d) {
              if (!d.relatedEntityIds || select(this).classed('disabled')) return;
              utilHighlightEntities(d.relatedEntityIds(), true, context);
            }).on('mouseleave.highlight', function (d3_event, d) {
              if (!d.relatedEntityIds) return;
              utilHighlightEntities(d.relatedEntityIds(), false, context);
            });
            buttonsEnter.each(function (d) {
              var tooltip = uiTooltip().heading(d.title).title(d.tooltip()).keys([d.keys[0]]);

              _tooltips.push(tooltip);

              select(this).call(tooltip).append('div').attr('class', 'icon-wrap').call(svgIcon('#iD-operation-' + d.id, 'operation'));
            });

            if (showLabels) {
              buttonsEnter.append('span').attr('class', 'label').html(function (d) {
                return d.title;
              });
            } // update


            buttonsEnter.merge(buttons).classed('disabled', function (d) {
              return d.disabled();
            });
            updatePosition();
            var initialScale = context.projection.scale();
            context.map().on('move.edit-menu', function () {
              if (initialScale !== context.projection.scale()) {
                editMenu.close();
              }
            }).on('drawn.edit-menu', function (info) {
              if (info.full) updatePosition();
            });
            var lastPointerUpType; // `pointerup` is always called before `click`

            function pointerup(d3_event) {
              lastPointerUpType = d3_event.pointerType;
            }

            function click(d3_event, operation) {
              d3_event.stopPropagation();

              if (operation.relatedEntityIds) {
                utilHighlightEntities(operation.relatedEntityIds(), false, context);
              }

              if (operation.disabled()) {
                if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
                  // there are no tooltips for touch interactions so flash feedback instead
                  context.ui().flash.duration(4000).iconName('#iD-operation-' + operation.id).iconClass('operation disabled').label(operation.tooltip)();
                }
              } else {
                if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
                  context.ui().flash.duration(2000).iconName('#iD-operation-' + operation.id).iconClass('operation').label(operation.annotation() || operation.title)();
                }

                operation();
                editMenu.close();
              }

              lastPointerUpType = null;
            }

            dispatch.call('toggled', this, true);
          };

          function updatePosition() {
            if (!_menu || _menu.empty()) return;
            var anchorLoc = context.projection(_anchorLocLonLat);
            var viewport = context.surfaceRect();

            if (anchorLoc[0] < 0 || anchorLoc[0] > viewport.width || anchorLoc[1] < 0 || anchorLoc[1] > viewport.height) {
              // close the menu if it's gone offscreen
              editMenu.close();
              return;
            }

            var menuLeft = displayOnLeft(viewport);
            var offset = [0, 0];
            offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;

            if (_menuTop) {
              if (anchorLoc[1] - _menuHeight < _vpTopMargin) {
                // menu is near top viewport edge, shift downward
                offset[1] = -anchorLoc[1] + _vpTopMargin;
              } else {
                offset[1] = -_menuHeight;
              }
            } else {
              if (anchorLoc[1] + _menuHeight > viewport.height - _vpBottomMargin) {
                // menu is near bottom viewport edge, shift upwards
                offset[1] = -anchorLoc[1] - _menuHeight + viewport.height - _vpBottomMargin;
              } else {
                offset[1] = 0;
              }
            }

            var origin = geoVecAdd(anchorLoc, offset);

            _menu.style('left', origin[0] + 'px').style('top', origin[1] + 'px');

            var tooltipSide = tooltipPosition(viewport, menuLeft);

            _tooltips.forEach(function (tooltip) {
              tooltip.placement(tooltipSide);
            });

            function displayOnLeft(viewport) {
              if (_mainLocalizer.textDirection() === 'ltr') {
                if (anchorLoc[0] + _menuSideMargin + _menuWidth > viewport.width - _vpSideMargin) {
                  // right menu would be too close to the right viewport edge, go left
                  return true;
                } // prefer right menu


                return false;
              } else {
                // rtl
                if (anchorLoc[0] - _menuSideMargin - _menuWidth < _vpSideMargin) {
                  // left menu would be too close to the left viewport edge, go right
                  return false;
                } // prefer left menu


                return true;
              }
            }

            function tooltipPosition(viewport, menuLeft) {
              if (_mainLocalizer.textDirection() === 'ltr') {
                if (menuLeft) {
                  // if there's not room for a right-side menu then there definitely
                  // isn't room for right-side tooltips
                  return 'left';
                }

                if (anchorLoc[0] + _menuSideMargin + _menuWidth + _tooltipWidth > viewport.width - _vpSideMargin) {
                  // right tooltips would be too close to the right viewport edge, go left
                  return 'left';
                } // prefer right tooltips


                return 'right';
              } else {
                // rtl
                if (!menuLeft) {
                  return 'right';
                }

                if (anchorLoc[0] - _menuSideMargin - _menuWidth - _tooltipWidth < _vpSideMargin) {
                  // left tooltips would be too close to the left viewport edge, go right
                  return 'right';
                } // prefer left tooltips


                return 'left';
              }
            }
          }

          editMenu.close = function () {
            context.map().on('move.edit-menu', null).on('drawn.edit-menu', null);

            _menu.remove();

            _tooltips = [];
            dispatch.call('toggled', this, false);
          };

          editMenu.anchorLoc = function (val) {
            if (!arguments.length) return _anchorLoc;
            _anchorLoc = val;
            _anchorLocLonLat = context.projection.invert(_anchorLoc);
            return editMenu;
          };

          editMenu.triggerType = function (val) {
            if (!arguments.length) return _triggerType;
            _triggerType = val;
            return editMenu;
          };

          editMenu.operations = function (val) {
            if (!arguments.length) return _operations;
            _operations = val;
            return editMenu;
          };

          return utilRebind(editMenu, dispatch, 'on');
        }

        function uiFeatureInfo(context) {
          function update(selection) {
            var features = context.features();
            var stats = features.stats();
            var count = 0;
            var hiddenList = features.hidden().map(function (k) {
              if (stats[k]) {
                count += stats[k];
                return _t('inspector.title_count', {
                  title: _t.html('feature.' + k + '.description'),
                  count: stats[k]
                });
              }

              return null;
            }).filter(Boolean);
            selection.html('');

            if (hiddenList.length) {
              var tooltipBehavior = uiTooltip().placement('top').title(function () {
                return hiddenList.join('<br/>');
              });
              selection.append('a').attr('class', 'chip').attr('href', '#').html(_t.html('feature_info.hidden_warning', {
                count: count
              })).call(tooltipBehavior).on('click', function (d3_event) {
                tooltipBehavior.hide();
                d3_event.preventDefault(); // open the Map Data pane

                context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
              });
            }

            selection.classed('hide', !hiddenList.length);
          }

          return function (selection) {
            update(selection);
            context.features().on('change.feature_info', function () {
              update(selection);
            });
          };
        }

        function uiFlash(context) {
          var _flashTimer;

          var _duration = 2000;
          var _iconName = '#iD-icon-no';
          var _iconClass = 'disabled';
          var _label = '';

          function flash() {
            if (_flashTimer) {
              _flashTimer.stop();
            }

            context.container().select('.main-footer-wrap').classed('footer-hide', true).classed('footer-show', false);
            context.container().select('.flash-wrap').classed('footer-hide', false).classed('footer-show', true);
            var content = context.container().select('.flash-wrap').selectAll('.flash-content').data([0]); // Enter

            var contentEnter = content.enter().append('div').attr('class', 'flash-content');
            var iconEnter = contentEnter.append('svg').attr('class', 'flash-icon icon').append('g').attr('transform', 'translate(10,10)');
            iconEnter.append('circle').attr('r', 9);
            iconEnter.append('use').attr('transform', 'translate(-7,-7)').attr('width', '14').attr('height', '14');
            contentEnter.append('div').attr('class', 'flash-text'); // Update

            content = content.merge(contentEnter);
            content.selectAll('.flash-icon').attr('class', 'icon flash-icon ' + (_iconClass || ''));
            content.selectAll('.flash-icon use').attr('xlink:href', _iconName);
            content.selectAll('.flash-text').attr('class', 'flash-text').html(_label);
            _flashTimer = d3_timeout(function () {
              _flashTimer = null;
              context.container().select('.main-footer-wrap').classed('footer-hide', false).classed('footer-show', true);
              context.container().select('.flash-wrap').classed('footer-hide', true).classed('footer-show', false);
            }, _duration);
            return content;
          }

          flash.duration = function (_) {
            if (!arguments.length) return _duration;
            _duration = _;
            return flash;
          };

          flash.label = function (_) {
            if (!arguments.length) return _label;
            _label = _;
            return flash;
          };

          flash.iconName = function (_) {
            if (!arguments.length) return _iconName;
            _iconName = _;
            return flash;
          };

          flash.iconClass = function (_) {
            if (!arguments.length) return _iconClass;
            _iconClass = _;
            return flash;
          };

          return flash;
        }

        function uiFullScreen(context) {
          var element = context.container().node(); // var button = d3_select(null);

          function getFullScreenFn() {
            if (element.requestFullscreen) {
              return element.requestFullscreen;
            } else if (element.msRequestFullscreen) {
              return element.msRequestFullscreen;
            } else if (element.mozRequestFullScreen) {
              return element.mozRequestFullScreen;
            } else if (element.webkitRequestFullscreen) {
              return element.webkitRequestFullscreen;
            }
          }

          function getExitFullScreenFn() {
            if (document.exitFullscreen) {
              return document.exitFullscreen;
            } else if (document.msExitFullscreen) {
              return document.msExitFullscreen;
            } else if (document.mozCancelFullScreen) {
              return document.mozCancelFullScreen;
            } else if (document.webkitExitFullscreen) {
              return document.webkitExitFullscreen;
            }
          }

          function isFullScreen() {
            return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
          }

          function isSupported() {
            return !!getFullScreenFn();
          }

          function fullScreen(d3_event) {
            d3_event.preventDefault();

            if (!isFullScreen()) {
              // button.classed('active', true);
              getFullScreenFn().apply(element);
            } else {
              // button.classed('active', false);
              getExitFullScreenFn().apply(document);
            }
          }

          return function () {
            // selection) {
            if (!isSupported()) return; // button = selection.append('button')
            //     .attr('title', t('full_screen'))
            //     .on('click', fullScreen)
            //     .call(tooltip);
            // button.append('span')
            //     .attr('class', 'icon full-screen');

            var detected = utilDetect();
            var keys = detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11'];
            context.keybinding().on(keys, fullScreen);
          };
        }

        function uiGeolocate(context) {
          var _geolocationOptions = {
            // prioritize speed and power usage over precision
            enableHighAccuracy: false,
            // don't hang indefinitely getting the location
            timeout: 6000 // 6sec

          };

          var _locating = uiLoading(context).message(_t.html('geolocate.locating')).blocking(true);

          var _layer = context.layers().layer('geolocate');

          var _position;

          var _extent;

          var _timeoutID;

          var _button = select(null);

          function click() {
            if (context.inIntro()) return;

            if (!_layer.enabled() && !_locating.isShown()) {
              // This timeout ensures that we still call finish() even if
              // the user declines to share their location in Firefox
              _timeoutID = setTimeout(error, 10000
              /* 10sec */
              );
              context.container().call(_locating); // get the latest position even if we already have one

              navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
            } else {
              _locating.close();

              _layer.enabled(null, false);

              updateButtonState();
            }
          }

          function zoomTo() {
            context.enter(modeBrowse(context));
            var map = context.map();

            _layer.enabled(_position, true);

            updateButtonState();
            map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
          }

          function success(geolocation) {
            _position = geolocation;
            var coords = _position.coords;
            _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
            zoomTo();
            finish();
          }

          function error() {
            if (_position) {
              // use the position from a previous call if we have one
              zoomTo();
            } else {
              context.ui().flash.label(_t.html('geolocate.location_unavailable')).iconName('#iD-icon-geolocate')();
            }

            finish();
          }

          function finish() {
            _locating.close(); // unblock ui


            if (_timeoutID) {
              clearTimeout(_timeoutID);
            }

            _timeoutID = undefined;
          }

          function updateButtonState() {
            _button.classed('active', _layer.enabled());
          }

          return function (selection) {
            if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) return;
            _button = selection.append('button').on('click', click).call(svgIcon('#iD-icon-geolocate', 'light')).call(uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_t.html('geolocate.title')).keys([_t('geolocate.key')]));
            context.keybinding().on(_t('geolocate.key'), click);
          };
        }

        function uiPanelBackground(context) {
          var background = context.background();
          var _currSourceName = null;
          var _metadata = {};
          var _metadataKeys = ['zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'];

          var debouncedRedraw = debounce(redraw, 250);

          function redraw(selection) {
            var source = background.baseLayerSource();
            if (!source) return;
            var isDG = source.id.match(/^DigitalGlobe/i) !== null;
            var sourceLabel = source.label();

            if (_currSourceName !== sourceLabel) {
              _currSourceName = sourceLabel;
              _metadata = {};
            }

            selection.html('');
            var list = selection.append('ul').attr('class', 'background-info');
            list.append('li').html(_currSourceName);

            _metadataKeys.forEach(function (k) {
              // DigitalGlobe vintage is available in raster layers for now.
              if (isDG && k === 'vintage') return;
              list.append('li').attr('class', 'background-info-list-' + k).classed('hide', !_metadata[k]).html(_t.html('info_panels.background.' + k) + ':').append('span').attr('class', 'background-info-span-' + k).html(_metadata[k]);
            });

            debouncedGetMetadata(selection);
            var toggleTiles = context.getDebug('tile') ? 'hide_tiles' : 'show_tiles';
            selection.append('a').html(_t.html('info_panels.background.' + toggleTiles)).attr('href', '#').attr('class', 'button button-toggle-tiles').on('click', function (d3_event) {
              d3_event.preventDefault();
              context.setDebug('tile', !context.getDebug('tile'));
              selection.call(redraw);
            });

            if (isDG) {
              var key = source.id + '-vintage';
              var sourceVintage = context.background().findSource(key);
              var showsVintage = context.background().showsLayer(sourceVintage);
              var toggleVintage = showsVintage ? 'hide_vintage' : 'show_vintage';
              selection.append('a').html(_t.html('info_panels.background.' + toggleVintage)).attr('href', '#').attr('class', 'button button-toggle-vintage').on('click', function (d3_event) {
                d3_event.preventDefault();
                context.background().toggleOverlayLayer(sourceVintage);
                selection.call(redraw);
              });
            } // disable if necessary


            ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function (layerId) {
              if (source.id !== layerId) {
                var key = layerId + '-vintage';
                var sourceVintage = context.background().findSource(key);

                if (context.background().showsLayer(sourceVintage)) {
                  context.background().toggleOverlayLayer(sourceVintage);
                }
              }
            });
          }

          var debouncedGetMetadata = debounce(getMetadata, 250);

          function getMetadata(selection) {
            var tile = context.container().select('.layer-background img.tile-center'); // tile near viewport center

            if (tile.empty()) return;
            var sourceName = _currSourceName;
            var d = tile.datum();
            var zoom = d && d.length >= 3 && d[2] || Math.floor(context.map().zoom());
            var center = context.map().center(); // update zoom

            _metadata.zoom = String(zoom);
            selection.selectAll('.background-info-list-zoom').classed('hide', false).selectAll('.background-info-span-zoom').html(_metadata.zoom);
            if (!d || !d.length >= 3) return;
            background.baseLayerSource().getMetadata(center, d, function (err, result) {
              if (err || _currSourceName !== sourceName) return; // update vintage

              var vintage = result.vintage;
              _metadata.vintage = vintage && vintage.range || _t('info_panels.background.unknown');
              selection.selectAll('.background-info-list-vintage').classed('hide', false).selectAll('.background-info-span-vintage').html(_metadata.vintage); // update other _metadata

              _metadataKeys.forEach(function (k) {
                if (k === 'zoom' || k === 'vintage') return; // done already

                var val = result[k];
                _metadata[k] = val;
                selection.selectAll('.background-info-list-' + k).classed('hide', !val).selectAll('.background-info-span-' + k).html(val);
              });
            });
          }

          var panel = function panel(selection) {
            selection.call(redraw);
            context.map().on('drawn.info-background', function () {
              selection.call(debouncedRedraw);
            }).on('move.info-background', function () {
              selection.call(debouncedGetMetadata);
            });
          };

          panel.off = function () {
            context.map().on('drawn.info-background', null).on('move.info-background', null);
          };

          panel.id = 'background';
          panel.label = _t.html('info_panels.background.title');
          panel.key = _t('info_panels.background.key');
          return panel;
        }

        function uiPanelHistory(context) {
          var osm;

          function displayTimestamp(timestamp) {
            if (!timestamp) return _t('info_panels.history.unknown');
            var options = {
              day: 'numeric',
              month: 'short',
              year: 'numeric',
              hour: 'numeric',
              minute: 'numeric',
              second: 'numeric'
            };
            var d = new Date(timestamp);
            if (isNaN(d.getTime())) return _t('info_panels.history.unknown');
            return d.toLocaleString(_mainLocalizer.localeCode(), options);
          }

          function displayUser(selection, userName) {
            if (!userName) {
              selection.append('span').html(_t.html('info_panels.history.unknown'));
              return;
            }

            selection.append('span').attr('class', 'user-name').html(userName);
            var links = selection.append('div').attr('class', 'links');

            if (osm) {
              links.append('a').attr('class', 'user-osm-link').attr('href', osm.userURL(userName)).attr('target', '_blank').html('OSM');
            }

            links.append('a').attr('class', 'user-hdyc-link').attr('href', 'https://hdyc.neis-one.org/?' + userName).attr('target', '_blank').attr('tabindex', -1).html('HDYC');
          }

          function displayChangeset(selection, changeset) {
            if (!changeset) {
              selection.append('span').html(_t.html('info_panels.history.unknown'));
              return;
            }

            selection.append('span').attr('class', 'changeset-id').html(changeset);
            var links = selection.append('div').attr('class', 'links');

            if (osm) {
              links.append('a').attr('class', 'changeset-osm-link').attr('href', osm.changesetURL(changeset)).attr('target', '_blank').html('OSM');
            }

            links.append('a').attr('class', 'changeset-osmcha-link').attr('href', 'https://osmcha.org/changesets/' + changeset).attr('target', '_blank').html('OSMCha');
            links.append('a').attr('class', 'changeset-achavi-link').attr('href', 'https://overpass-api.de/achavi/?changeset=' + changeset).attr('target', '_blank').html('Achavi');
          }

          function redraw(selection) {
            var selectedNoteID = context.selectedNoteID();
            osm = context.connection();
            var selected, note, entity;

            if (selectedNoteID && osm) {
              // selected 1 note
              selected = [_t('note.note') + ' ' + selectedNoteID];
              note = osm.getNote(selectedNoteID);
            } else {
              // selected 1..n entities
              selected = context.selectedIDs().filter(function (e) {
                return context.hasEntity(e);
              });

              if (selected.length) {
                entity = context.entity(selected[0]);
              }
            }

            var singular = selected.length === 1 ? selected[0] : null;
            selection.html('');
            selection.append('h4').attr('class', 'history-heading').html(singular || _t.html('info_panels.selected', {
              n: selected.length
            }));
            if (!singular) return;

            if (entity) {
              selection.call(redrawEntity, entity);
            } else if (note) {
              selection.call(redrawNote, note);
            }
          }

          function redrawNote(selection, note) {
            if (!note || note.isNew()) {
              selection.append('div').html(_t.html('info_panels.history.note_no_history'));
              return;
            }

            var list = selection.append('ul');
            list.append('li').html(_t.html('info_panels.history.note_comments') + ':').append('span').html(note.comments.length);

            if (note.comments.length) {
              list.append('li').html(_t.html('info_panels.history.note_created_date') + ':').append('span').html(displayTimestamp(note.comments[0].date));
              list.append('li').html(_t.html('info_panels.history.note_created_user') + ':').call(displayUser, note.comments[0].user);
            }

            if (osm) {
              selection.append('a').attr('class', 'view-history-on-osm').attr('target', '_blank').attr('href', osm.noteURL(note)).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('info_panels.history.note_link_text'));
            }
          }

          function redrawEntity(selection, entity) {
            if (!entity || entity.isNew()) {
              selection.append('div').html(_t.html('info_panels.history.no_history'));
              return;
            }

            var links = selection.append('div').attr('class', 'links');

            if (osm) {
              links.append('a').attr('class', 'view-history-on-osm').attr('href', osm.historyURL(entity)).attr('target', '_blank').attr('title', _t('info_panels.history.link_text')).html('OSM');
            }

            links.append('a').attr('class', 'pewu-history-viewer-link').attr('href', 'https://pewu.github.io/osm-history/#/' + entity.type + '/' + entity.osmId()).attr('target', '_blank').attr('tabindex', -1).html('PeWu');
            var list = selection.append('ul');
            list.append('li').html(_t.html('info_panels.history.version') + ':').append('span').html(entity.version);
            list.append('li').html(_t.html('info_panels.history.last_edit') + ':').append('span').html(displayTimestamp(entity.timestamp));
            list.append('li').html(_t.html('info_panels.history.edited_by') + ':').call(displayUser, entity.user);
            list.append('li').html(_t.html('info_panels.history.changeset') + ':').call(displayChangeset, entity.changeset);
          }

          var panel = function panel(selection) {
            selection.call(redraw);
            context.map().on('drawn.info-history', function () {
              selection.call(redraw);
            });
            context.on('enter.info-history', function () {
              selection.call(redraw);
            });
          };

          panel.off = function () {
            context.map().on('drawn.info-history', null);
            context.on('enter.info-history', null);
          };

          panel.id = 'history';
          panel.label = _t.html('info_panels.history.title');
          panel.key = _t('info_panels.history.key');
          return panel;
        }

        var OSM_PRECISION = 7;
        /**
         * Returns a localized representation of the given length measurement.
         *
         * @param {Number} m area in meters
         * @param {Boolean} isImperial true for U.S. customary units; false for metric
         */

        function displayLength(m, isImperial) {
          var d = m * (isImperial ? 3.28084 : 1);
          var unit;

          if (isImperial) {
            if (d >= 5280) {
              d /= 5280;
              unit = 'miles';
            } else {
              unit = 'feet';
            }
          } else {
            if (d >= 1000) {
              d /= 1000;
              unit = 'kilometers';
            } else {
              unit = 'meters';
            }
          }

          return _t('units.' + unit, {
            quantity: d.toLocaleString(_mainLocalizer.localeCode(), {
              maximumSignificantDigits: 4
            })
          });
        }
        /**
         * Returns a localized representation of the given area measurement.
         *
         * @param {Number} m2 area in square meters
         * @param {Boolean} isImperial true for U.S. customary units; false for metric
         */

        function displayArea(m2, isImperial) {
          var locale = _mainLocalizer.localeCode();
          var d = m2 * (isImperial ? 10.7639111056 : 1);
          var d1, d2, area;
          var unit1 = '';
          var unit2 = '';

          if (isImperial) {
            if (d >= 6969600) {
              // > 0.25mi² show mi²
              d1 = d / 27878400;
              unit1 = 'square_miles';
            } else {
              d1 = d;
              unit1 = 'square_feet';
            }

            if (d > 4356 && d < 43560000) {
              // 0.1 - 1000 acres
              d2 = d / 43560;
              unit2 = 'acres';
            }
          } else {
            if (d >= 250000) {
              // > 0.25km² show km²
              d1 = d / 1000000;
              unit1 = 'square_kilometers';
            } else {
              d1 = d;
              unit1 = 'square_meters';
            }

            if (d > 1000 && d < 10000000) {
              // 0.1 - 1000 hectares
              d2 = d / 10000;
              unit2 = 'hectares';
            }
          }

          area = _t('units.' + unit1, {
            quantity: d1.toLocaleString(locale, {
              maximumSignificantDigits: 4
            })
          });

          if (d2) {
            return _t('units.area_pair', {
              area1: area,
              area2: _t('units.' + unit2, {
                quantity: d2.toLocaleString(locale, {
                  maximumSignificantDigits: 2
                })
              })
            });
          } else {
            return area;
          }
        }

        function wrap(x, min, max) {
          var d = max - min;
          return ((x - min) % d + d) % d + min;
        }

        function clamp(x, min, max) {
          return Math.max(min, Math.min(x, max));
        }

        function displayCoordinate(deg, pos, neg) {
          var locale = _mainLocalizer.localeCode();
          var min = (Math.abs(deg) - Math.floor(Math.abs(deg))) * 60;
          var sec = (min - Math.floor(min)) * 60;
          var displayDegrees = _t('units.arcdegrees', {
            quantity: Math.floor(Math.abs(deg)).toLocaleString(locale)
          });
          var displayCoordinate;

          if (Math.floor(sec) > 0) {
            displayCoordinate = displayDegrees + _t('units.arcminutes', {
              quantity: Math.floor(min).toLocaleString(locale)
            }) + _t('units.arcseconds', {
              quantity: Math.round(sec).toLocaleString(locale)
            });
          } else if (Math.floor(min) > 0) {
            displayCoordinate = displayDegrees + _t('units.arcminutes', {
              quantity: Math.round(min).toLocaleString(locale)
            });
          } else {
            displayCoordinate = _t('units.arcdegrees', {
              quantity: Math.round(Math.abs(deg)).toLocaleString(locale)
            });
          }

          if (deg === 0) {
            return displayCoordinate;
          } else {
            return _t('units.coordinate', {
              coordinate: displayCoordinate,
              direction: _t('units.' + (deg > 0 ? pos : neg))
            });
          }
        }
        /**
         * Returns given coordinate pair in degree-minute-second format.
         *
         * @param {Array<Number>} coord longitude and latitude
         */


        function dmsCoordinatePair(coord) {
          return _t('units.coordinate_pair', {
            latitude: displayCoordinate(clamp(coord[1], -90, 90), 'north', 'south'),
            longitude: displayCoordinate(wrap(coord[0], -180, 180), 'east', 'west')
          });
        }
        /**
         * Returns the given coordinate pair in decimal format.
         * note: unlocalized to avoid comma ambiguity - see #4765
         *
         * @param {Array<Number>} coord longitude and latitude
         */

        function decimalCoordinatePair(coord) {
          return _t('units.coordinate_pair', {
            latitude: clamp(coord[1], -90, 90).toFixed(OSM_PRECISION),
            longitude: wrap(coord[0], -180, 180).toFixed(OSM_PRECISION)
          });
        }

        function uiPanelLocation(context) {
          var currLocation = '';

          function redraw(selection) {
            selection.html('');
            var list = selection.append('ul'); // Mouse coordinates

            var coord = context.map().mouseCoordinates();

            if (coord.some(isNaN)) {
              coord = context.map().center();
            }

            list.append('li').html(dmsCoordinatePair(coord)).append('li').html(decimalCoordinatePair(coord)); // Location Info

            selection.append('div').attr('class', 'location-info').html(currLocation || ' ');
            debouncedGetLocation(selection, coord);
          }

          var debouncedGetLocation = debounce(getLocation, 250);

          function getLocation(selection, coord) {
            if (!services.geocoder) {
              currLocation = _t('info_panels.location.unknown_location');
              selection.selectAll('.location-info').html(currLocation);
            } else {
              services.geocoder.reverse(coord, function (err, result) {
                currLocation = result ? result.display_name : _t('info_panels.location.unknown_location');
                selection.selectAll('.location-info').html(currLocation);
              });
            }
          }

          var panel = function panel(selection) {
            selection.call(redraw);
            context.surface().on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function () {
              selection.call(redraw);
            });
          };

          panel.off = function () {
            context.surface().on('.info-location', null);
          };

          panel.id = 'location';
          panel.label = _t.html('info_panels.location.title');
          panel.key = _t('info_panels.location.key');
          return panel;
        }

        function uiPanelMeasurement(context) {
          function radiansToMeters(r) {
            // using WGS84 authalic radius (6371007.1809 m)
            return r * 6371007.1809;
          }

          function steradiansToSqmeters(r) {
            // http://gis.stackexchange.com/a/124857/40446
            return r / (4 * Math.PI) * 510065621724000;
          }

          function toLineString(feature) {
            if (feature.type === 'LineString') return feature;
            var result = {
              type: 'LineString',
              coordinates: []
            };

            if (feature.type === 'Polygon') {
              result.coordinates = feature.coordinates[0];
            } else if (feature.type === 'MultiPolygon') {
              result.coordinates = feature.coordinates[0][0];
            }

            return result;
          }

          var _isImperial = !_mainLocalizer.usesMetric();

          function redraw(selection) {
            var graph = context.graph();
            var selectedNoteID = context.selectedNoteID();
            var osm = services.osm;
            var localeCode = _mainLocalizer.localeCode();
            var heading;
            var center, location, centroid;
            var closed, geometry;
            var totalNodeCount,
                length = 0,
                area = 0,
                distance;

            if (selectedNoteID && osm) {
              // selected 1 note
              var note = osm.getNote(selectedNoteID);
              heading = _t('note.note') + ' ' + selectedNoteID;
              location = note.loc;
              geometry = 'note';
            } else {
              // selected 1..n entities
              var selectedIDs = context.selectedIDs().filter(function (id) {
                return context.hasEntity(id);
              });
              var selected = selectedIDs.map(function (id) {
                return context.entity(id);
              });
              heading = selected.length === 1 ? selected[0].id : _t('info_panels.selected', {
                n: selected.length
              });

              if (selected.length) {
                var extent = geoExtent();

                for (var i in selected) {
                  var entity = selected[i];

                  extent._extend(entity.extent(graph));

                  geometry = entity.geometry(graph);

                  if (geometry === 'line' || geometry === 'area') {
                    closed = entity.type === 'relation' || entity.isClosed() && !entity.isDegenerate();
                    var feature = entity.asGeoJSON(graph);
                    length += radiansToMeters(d3_geoLength(toLineString(feature)));
                    centroid = d3_geoPath(context.projection).centroid(entity.asGeoJSON(graph));
                    centroid = centroid && context.projection.invert(centroid);

                    if (!centroid || !isFinite(centroid[0]) || !isFinite(centroid[1])) {
                      centroid = entity.extent(graph).center();
                    }

                    if (closed) {
                      area += steradiansToSqmeters(entity.area(graph));
                    }
                  }
                }

                if (selected.length > 1) {
                  geometry = null;
                  closed = null;
                  centroid = null;
                }

                if (selected.length === 2 && selected[0].type === 'node' && selected[1].type === 'node') {
                  distance = geoSphericalDistance(selected[0].loc, selected[1].loc);
                }

                if (selected.length === 1 && selected[0].type === 'node') {
                  location = selected[0].loc;
                } else {
                  totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
                }

                if (!location && !centroid) {
                  center = extent.center();
                }
              }
            }

            selection.html('');

            if (heading) {
              selection.append('h4').attr('class', 'measurement-heading').html(heading);
            }

            var list = selection.append('ul');
            var coordItem;

            if (geometry) {
              list.append('li').html(_t.html('info_panels.measurement.geometry') + ':').append('span').html(closed ? _t('info_panels.measurement.closed_' + geometry) : _t('geometry.' + geometry));
            }

            if (totalNodeCount) {
              list.append('li').html(_t.html('info_panels.measurement.node_count') + ':').append('span').html(totalNodeCount.toLocaleString(localeCode));
            }

            if (area) {
              list.append('li').html(_t.html('info_panels.measurement.area') + ':').append('span').html(displayArea(area, _isImperial));
            }

            if (length) {
              list.append('li').html(_t.html('info_panels.measurement.' + (closed ? 'perimeter' : 'length')) + ':').append('span').html(displayLength(length, _isImperial));
            }

            if (typeof distance === 'number') {
              list.append('li').html(_t.html('info_panels.measurement.distance') + ':').append('span').html(displayLength(distance, _isImperial));
            }

            if (location) {
              coordItem = list.append('li').html(_t.html('info_panels.measurement.location') + ':');
              coordItem.append('span').html(dmsCoordinatePair(location));
              coordItem.append('span').html(decimalCoordinatePair(location));
            }

            if (centroid) {
              coordItem = list.append('li').html(_t.html('info_panels.measurement.centroid') + ':');
              coordItem.append('span').html(dmsCoordinatePair(centroid));
              coordItem.append('span').html(decimalCoordinatePair(centroid));
            }

            if (center) {
              coordItem = list.append('li').html(_t.html('info_panels.measurement.center') + ':');
              coordItem.append('span').html(dmsCoordinatePair(center));
              coordItem.append('span').html(decimalCoordinatePair(center));
            }

            if (length || area || typeof distance === 'number') {
              var toggle = _isImperial ? 'imperial' : 'metric';
              selection.append('a').html(_t.html('info_panels.measurement.' + toggle)).attr('href', '#').attr('class', 'button button-toggle-units').on('click', function (d3_event) {
                d3_event.preventDefault();
                _isImperial = !_isImperial;
                selection.call(redraw);
              });
            }
          }

          var panel = function panel(selection) {
            selection.call(redraw);
            context.map().on('drawn.info-measurement', function () {
              selection.call(redraw);
            });
            context.on('enter.info-measurement', function () {
              selection.call(redraw);
            });
          };

          panel.off = function () {
            context.map().on('drawn.info-measurement', null);
            context.on('enter.info-measurement', null);
          };

          panel.id = 'measurement';
          panel.label = _t.html('info_panels.measurement.title');
          panel.key = _t('info_panels.measurement.key');
          return panel;
        }

        var uiInfoPanels = {
          background: uiPanelBackground,
          history: uiPanelHistory,
          location: uiPanelLocation,
          measurement: uiPanelMeasurement
        };

        function uiInfo(context) {
          var ids = Object.keys(uiInfoPanels);
          var wasActive = ['measurement'];
          var panels = {};
          var active = {}; // create panels

          ids.forEach(function (k) {
            if (!panels[k]) {
              panels[k] = uiInfoPanels[k](context);
              active[k] = false;
            }
          });

          function info(selection) {
            function redraw() {
              var activeids = ids.filter(function (k) {
                return active[k];
              }).sort();
              var containers = infoPanels.selectAll('.panel-container').data(activeids, function (k) {
                return k;
              });
              containers.exit().style('opacity', 1).transition().duration(200).style('opacity', 0).on('end', function (d) {
                select(this).call(panels[d].off).remove();
              });
              var enter = containers.enter().append('div').attr('class', function (d) {
                return 'fillD2 panel-container panel-container-' + d;
              });
              enter.style('opacity', 0).transition().duration(200).style('opacity', 1);
              var title = enter.append('div').attr('class', 'panel-title fillD2');
              title.append('h3').html(function (d) {
                return panels[d].label;
              });
              title.append('button').attr('class', 'close').on('click', function (d3_event, d) {
                d3_event.stopImmediatePropagation();
                d3_event.preventDefault();
                info.toggle(d);
              }).call(svgIcon('#iD-icon-close'));
              enter.append('div').attr('class', function (d) {
                return 'panel-content panel-content-' + d;
              }); // redraw the panels

              infoPanels.selectAll('.panel-content').each(function (d) {
                select(this).call(panels[d]);
              });
            }

            info.toggle = function (which) {
              var activeids = ids.filter(function (k) {
                return active[k];
              });

              if (which) {
                // toggle one
                active[which] = !active[which];

                if (activeids.length === 1 && activeids[0] === which) {
                  // none active anymore
                  wasActive = [which];
                }

                context.container().select('.' + which + '-panel-toggle-item').classed('active', active[which]).select('input').property('checked', active[which]);
              } else {
                // toggle all
                if (activeids.length) {
                  wasActive = activeids;
                  activeids.forEach(function (k) {
                    active[k] = false;
                  });
                } else {
                  wasActive.forEach(function (k) {
                    active[k] = true;
                  });
                }
              }

              redraw();
            };

            var infoPanels = selection.selectAll('.info-panels').data([0]);
            infoPanels = infoPanels.enter().append('div').attr('class', 'info-panels').merge(infoPanels);
            redraw();
            context.keybinding().on(uiCmd('⌘' + _t('info_panels.key')), function (d3_event) {
              d3_event.stopImmediatePropagation();
              d3_event.preventDefault();
              info.toggle();
            });
            ids.forEach(function (k) {
              var key = _t('info_panels.' + k + '.key', {
                "default": null
              });
              if (!key) return;
              context.keybinding().on(uiCmd('⌘⇧' + key), function (d3_event) {
                d3_event.stopImmediatePropagation();
                d3_event.preventDefault();
                info.toggle(k);
              });
            });
          }

          return info;
        }

        function pointBox(loc, context) {
          var rect = context.surfaceRect();
          var point = context.curtainProjection(loc);
          return {
            left: point[0] + rect.left - 40,
            top: point[1] + rect.top - 60,
            width: 80,
            height: 90
          };
        }
        function pad(locOrBox, padding, context) {
          var box;

          if (locOrBox instanceof Array) {
            var rect = context.surfaceRect();
            var point = context.curtainProjection(locOrBox);
            box = {
              left: point[0] + rect.left,
              top: point[1] + rect.top
            };
          } else {
            box = locOrBox;
          }

          return {
            left: box.left - padding,
            top: box.top - padding,
            width: (box.width || 0) + 2 * padding,
            height: (box.width || 0) + 2 * padding
          };
        }
        function icon(name, svgklass, useklass) {
          return '<svg class="icon ' + (svgklass || '') + '">' + '<use xlink:href="' + name + '"' + (useklass ? ' class="' + useklass + '"' : '') + '></use></svg>';
        }
        var helpStringReplacements; // Returns the localized HTML element for `id` with a standardized set of icon, key, and
        // label replacements suitable for tutorials and documentation. Optionally supplemented
        // with custom `replacements`

        function helpHtml(id, replacements) {
          // only load these the first time
          if (!helpStringReplacements) {
            helpStringReplacements = {
              // insert icons corresponding to various UI elements
              point_icon: icon('#iD-icon-point', 'inline'),
              line_icon: icon('#iD-icon-line', 'inline'),
              area_icon: icon('#iD-icon-area', 'inline'),
              note_icon: icon('#iD-icon-note', 'inline add-note'),
              plus: icon('#iD-icon-plus', 'inline'),
              minus: icon('#iD-icon-minus', 'inline'),
              layers_icon: icon('#iD-icon-layers', 'inline'),
              data_icon: icon('#iD-icon-data', 'inline'),
              inspect: icon('#iD-icon-inspect', 'inline'),
              help_icon: icon('#iD-icon-help', 'inline'),
              undo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo', 'inline'),
              redo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-undo' : '#iD-icon-redo', 'inline'),
              save_icon: icon('#iD-icon-save', 'inline'),
              // operation icons
              circularize_icon: icon('#iD-operation-circularize', 'inline operation'),
              continue_icon: icon('#iD-operation-continue', 'inline operation'),
              copy_icon: icon('#iD-operation-copy', 'inline operation'),
              delete_icon: icon('#iD-operation-delete', 'inline operation'),
              disconnect_icon: icon('#iD-operation-disconnect', 'inline operation'),
              downgrade_icon: icon('#iD-operation-downgrade', 'inline operation'),
              extract_icon: icon('#iD-operation-extract', 'inline operation'),
              merge_icon: icon('#iD-operation-merge', 'inline operation'),
              move_icon: icon('#iD-operation-move', 'inline operation'),
              orthogonalize_icon: icon('#iD-operation-orthogonalize', 'inline operation'),
              paste_icon: icon('#iD-operation-paste', 'inline operation'),
              reflect_long_icon: icon('#iD-operation-reflect-long', 'inline operation'),
              reflect_short_icon: icon('#iD-operation-reflect-short', 'inline operation'),
              reverse_icon: icon('#iD-operation-reverse', 'inline operation'),
              rotate_icon: icon('#iD-operation-rotate', 'inline operation'),
              split_icon: icon('#iD-operation-split', 'inline operation'),
              straighten_icon: icon('#iD-operation-straighten', 'inline operation'),
              // interaction icons
              leftclick: icon('#iD-walkthrough-mouse-left', 'inline operation'),
              rightclick: icon('#iD-walkthrough-mouse-right', 'inline operation'),
              mousewheel_icon: icon('#iD-walkthrough-mousewheel', 'inline operation'),
              tap_icon: icon('#iD-walkthrough-tap', 'inline operation'),
              doubletap_icon: icon('#iD-walkthrough-doubletap', 'inline operation'),
              longpress_icon: icon('#iD-walkthrough-longpress', 'inline operation'),
              touchdrag_icon: icon('#iD-walkthrough-touchdrag', 'inline operation'),
              pinch_icon: icon('#iD-walkthrough-pinch-apart', 'inline operation'),
              // insert keys; may be localized and platform-dependent
              shift: uiCmd.display('⇧'),
              alt: uiCmd.display('⌥'),
              "return": uiCmd.display('↵'),
              esc: _t.html('shortcuts.key.esc'),
              space: _t.html('shortcuts.key.space'),
              add_note_key: _t.html('modes.add_note.key'),
              help_key: _t.html('help.key'),
              shortcuts_key: _t.html('shortcuts.toggle.key'),
              // reference localized UI labels directly so that they'll always match
              save: _t.html('save.title'),
              undo: _t.html('undo.title'),
              redo: _t.html('redo.title'),
              upload: _t.html('commit.save'),
              point: _t.html('modes.add_point.title'),
              line: _t.html('modes.add_line.title'),
              area: _t.html('modes.add_area.title'),
              note: _t.html('modes.add_note.label'),
              circularize: _t.html('operations.circularize.title'),
              "continue": _t.html('operations.continue.title'),
              copy: _t.html('operations.copy.title'),
              "delete": _t.html('operations.delete.title'),
              disconnect: _t.html('operations.disconnect.title'),
              downgrade: _t.html('operations.downgrade.title'),
              extract: _t.html('operations.extract.title'),
              merge: _t.html('operations.merge.title'),
              move: _t.html('operations.move.title'),
              orthogonalize: _t.html('operations.orthogonalize.title'),
              paste: _t.html('operations.paste.title'),
              reflect_long: _t.html('operations.reflect.title.long'),
              reflect_short: _t.html('operations.reflect.title.short'),
              reverse: _t.html('operations.reverse.title'),
              rotate: _t.html('operations.rotate.title'),
              split: _t.html('operations.split.title'),
              straighten: _t.html('operations.straighten.title'),
              map_data: _t.html('map_data.title'),
              osm_notes: _t.html('map_data.layers.notes.title'),
              fields: _t.html('inspector.fields'),
              tags: _t.html('inspector.tags'),
              relations: _t.html('inspector.relations'),
              new_relation: _t.html('inspector.new_relation'),
              turn_restrictions: _t.html('_tagging.presets.fields.restrictions.label'),
              background_settings: _t.html('background.description'),
              imagery_offset: _t.html('background.fix_misalignment'),
              start_the_walkthrough: _t.html('splash.walkthrough'),
              help: _t.html('help.title'),
              ok: _t.html('intro.ok')
            };
          }

          var reps;

          if (replacements) {
            reps = Object.assign(replacements, helpStringReplacements);
          } else {
            reps = helpStringReplacements;
          }

          return _t.html(id, reps) // use keyboard key styling for shortcuts
          .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
        }

        function slugify(text) {
          return text.toString().toLowerCase().replace(/\s+/g, '-') // Replace spaces with -
          .replace(/[^\w\-]+/g, '') // Remove all non-word chars
          .replace(/\-\-+/g, '-') // Replace multiple - with single -
          .replace(/^-+/, '') // Trim - from start of text
          .replace(/-+$/, ''); // Trim - from end of text
        } // console warning for missing walkthrough names


        var missingStrings = {};

        function checkKey(key, text) {
          if (_t(key, {
            "default": undefined
          }) === undefined) {
            if (missingStrings.hasOwnProperty(key)) return; // warn once

            missingStrings[key] = text;
            var missing = key + ': ' + text;
            if (typeof console !== 'undefined') console.log(missing); // eslint-disable-line
          }
        }

        function localize(obj) {
          var key; // Assign name if entity has one..

          var name = obj.tags && obj.tags.name;

          if (name) {
            key = 'intro.graph.name.' + slugify(name);
            obj.tags.name = _t(key, {
              "default": name
            });
            checkKey(key, name);
          } // Assign street name if entity has one..


          var street = obj.tags && obj.tags['addr:street'];

          if (street) {
            key = 'intro.graph.name.' + slugify(street);
            obj.tags['addr:street'] = _t(key, {
              "default": street
            });
            checkKey(key, street); // Add address details common across walkthrough..

            var addrTags = ['block_number', 'city', 'county', 'district', 'hamlet', 'neighbourhood', 'postcode', 'province', 'quarter', 'state', 'subdistrict', 'suburb'];
            addrTags.forEach(function (k) {
              var key = 'intro.graph.' + k;
              var tag = 'addr:' + k;
              var val = obj.tags && obj.tags[tag];
              var str = _t(key, {
                "default": val
              });

              if (str) {
                if (str.match(/^<.*>$/) !== null) {
                  delete obj.tags[tag];
                } else {
                  obj.tags[tag] = str;
                }
              }
            });
          }

          return obj;
        } // Used to detect squareness.. some duplicataion of code from actionOrthogonalize.

        function isMostlySquare(points) {
          // note: uses 15 here instead of the 12 from actionOrthogonalize because
          // actionOrthogonalize can actually straighten some larger angles as it iterates
          var threshold = 15; // degrees within right or straight

          var lowerBound = Math.cos((90 - threshold) * Math.PI / 180); // near right

          var upperBound = Math.cos(threshold * Math.PI / 180); // near straight

          for (var i = 0; i < points.length; i++) {
            var a = points[(i - 1 + points.length) % points.length];
            var origin = points[i];
            var b = points[(i + 1) % points.length];
            var dotp = geoVecNormalizedDot(a, b, origin);
            var mag = Math.abs(dotp);

            if (mag > lowerBound && mag < upperBound) {
              return false;
            }
          }

          return true;
        }
        function selectMenuItem(context, operation) {
          return context.container().select('.edit-menu .edit-menu-item-' + operation);
        }
        function transitionTime(point1, point2) {
          var distance = geoSphericalDistance(point1, point2);

          if (distance === 0) {
            return 0;
          } else if (distance < 80) {
            return 500;
          } else {
            return 1000;
          }
        }

        // hide class, which sets display=none, and a d3 transition for opacity.
        // this will cause blinking when called repeatedly, so check that the
        // value actually changes between calls.

        function uiToggle(show, callback) {
          return function (selection) {
            selection.style('opacity', show ? 0 : 1).classed('hide', false).transition().style('opacity', show ? 1 : 0).on('end', function () {
              select(this).classed('hide', !show).style('opacity', null);
              if (callback) callback.apply(this);
            });
          };
        }

        function uiCurtain(containerNode) {
          var surface = select(null),
              tooltip = select(null),
              darkness = select(null);

          function curtain(selection) {
            surface = selection.append('svg').attr('class', 'curtain').style('top', 0).style('left', 0);
            darkness = surface.append('path').attr('x', 0).attr('y', 0).attr('class', 'curtain-darkness');
            select(window).on('resize.curtain', resize);
            tooltip = selection.append('div').attr('class', 'tooltip');
            tooltip.append('div').attr('class', 'popover-arrow');
            tooltip.append('div').attr('class', 'popover-inner');
            resize();

            function resize() {
              surface.attr('width', containerNode.clientWidth).attr('height', containerNode.clientHeight);
              curtain.cut(darkness.datum());
            }
          }
          /**
           * Reveal cuts the curtain to highlight the given box,
           * and shows a tooltip with instructions next to the box.
           *
           * @param  {String|ClientRect} [box]   box used to cut the curtain
           * @param  {String}    [text]          text for a tooltip
           * @param  {Object}    [options]
           * @param  {string}    [options.tooltipClass]    optional class to add to the tooltip
           * @param  {integer}   [options.duration]        transition time in milliseconds
           * @param  {string}    [options.buttonText]      if set, create a button with this text label
           * @param  {function}  [options.buttonCallback]  if set, the callback for the button
           * @param  {function}  [options.padding]         extra margin in px to put around bbox
           * @param  {String|ClientRect} [options.tooltipBox]  box for tooltip position, if different from box for the curtain
           */


          curtain.reveal = function (box, html, options) {
            options = options || {};

            if (typeof box === 'string') {
              box = select(box).node();
            }

            if (box && box.getBoundingClientRect) {
              box = copyBox(box.getBoundingClientRect());
              var containerRect = containerNode.getBoundingClientRect();
              box.top -= containerRect.top;
              box.left -= containerRect.left;
            }

            if (box && options.padding) {
              box.top -= options.padding;
              box.left -= options.padding;
              box.bottom += options.padding;
              box.right += options.padding;
              box.height += options.padding * 2;
              box.width += options.padding * 2;
            }

            var tooltipBox;

            if (options.tooltipBox) {
              tooltipBox = options.tooltipBox;

              if (typeof tooltipBox === 'string') {
                tooltipBox = select(tooltipBox).node();
              }

              if (tooltipBox && tooltipBox.getBoundingClientRect) {
                tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
              }
            } else {
              tooltipBox = box;
            }

            if (tooltipBox && html) {
              if (html.indexOf('**') !== -1) {
                if (html.indexOf('<span') === 0) {
                  html = html.replace(/^(<span.*?>)(.+?)(\*\*)/, '$1<span>$2</span>$3');
                } else {
                  html = html.replace(/^(.+?)(\*\*)/, '<span>$1</span>$2');
                } // pseudo markdown bold text for the instruction section..


                html = html.replace(/\*\*(.*?)\*\*/g, '<span class="instruction">$1</span>');
              }

              html = html.replace(/\*(.*?)\*/g, '<em>$1</em>'); // emphasis

              html = html.replace(/\{br\}/g, '<br/><br/>'); // linebreak

              if (options.buttonText && options.buttonCallback) {
                html += '<div class="button-section">' + '<button href="#" class="button action">' + options.buttonText + '</button></div>';
              }

              var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
              tooltip.classed(classes, true).selectAll('.popover-inner').html(html);

              if (options.buttonText && options.buttonCallback) {
                var button = tooltip.selectAll('.button-section .button.action');
                button.on('click', function (d3_event) {
                  d3_event.preventDefault();
                  options.buttonCallback();
                });
              }

              var tip = copyBox(tooltip.node().getBoundingClientRect()),
                  w = containerNode.clientWidth,
                  h = containerNode.clientHeight,
                  tooltipWidth = 200,
                  tooltipArrow = 5,
                  side,
                  pos; // hack: this will have bottom placement,
              // so need to reserve extra space for the tooltip illustration.

              if (options.tooltipClass === 'intro-mouse') {
                tip.height += 80;
              } // trim box dimensions to just the portion that fits in the container..


              if (tooltipBox.top + tooltipBox.height > h) {
                tooltipBox.height -= tooltipBox.top + tooltipBox.height - h;
              }

              if (tooltipBox.left + tooltipBox.width > w) {
                tooltipBox.width -= tooltipBox.left + tooltipBox.width - w;
              } // determine tooltip placement..


              if (tooltipBox.top + tooltipBox.height < 100) {
                // tooltip below box..
                side = 'bottom';
                pos = [tooltipBox.left + tooltipBox.width / 2 - tip.width / 2, tooltipBox.top + tooltipBox.height];
              } else if (tooltipBox.top > h - 140) {
                // tooltip above box..
                side = 'top';
                pos = [tooltipBox.left + tooltipBox.width / 2 - tip.width / 2, tooltipBox.top - tip.height];
              } else {
                // tooltip to the side of the tooltipBox..
                var tipY = tooltipBox.top + tooltipBox.height / 2 - tip.height / 2;

                if (_mainLocalizer.textDirection() === 'rtl') {
                  if (tooltipBox.left - tooltipWidth - tooltipArrow < 70) {
                    side = 'right';
                    pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
                  } else {
                    side = 'left';
                    pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
                  }
                } else {
                  if (tooltipBox.left + tooltipBox.width + tooltipArrow + tooltipWidth > w - 70) {
                    side = 'left';
                    pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
                  } else {
                    side = 'right';
                    pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
                  }
                }
              }

              if (options.duration !== 0 || !tooltip.classed(side)) {
                tooltip.call(uiToggle(true));
              }

              tooltip.style('top', pos[1] + 'px').style('left', pos[0] + 'px').attr('class', classes + ' ' + side); // shift popover-inner if it is very close to the top or bottom edge
              // (doesn't affect the placement of the popover-arrow)

              var shiftY = 0;

              if (side === 'left' || side === 'right') {
                if (pos[1] < 60) {
                  shiftY = 60 - pos[1];
                } else if (pos[1] + tip.height > h - 100) {
                  shiftY = h - pos[1] - tip.height - 100;
                }
              }

              tooltip.selectAll('.popover-inner').style('top', shiftY + 'px');
            } else {
              tooltip.classed('in', false).call(uiToggle(false));
            }

            curtain.cut(box, options.duration);
            return tooltip;
          };

          curtain.cut = function (datum, duration) {
            darkness.datum(datum).interrupt();
            var selection;

            if (duration === 0) {
              selection = darkness;
            } else {
              selection = darkness.transition().duration(duration || 600).ease(linear$1);
            }

            selection.attr('d', function (d) {
              var containerWidth = containerNode.clientWidth;
              var containerHeight = containerNode.clientHeight;
              var string = 'M 0,0 L 0,' + containerHeight + ' L ' + containerWidth + ',' + containerHeight + 'L' + containerWidth + ',0 Z';
              if (!d) return string;
              return string + 'M' + d.left + ',' + d.top + 'L' + d.left + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + d.top + 'Z';
            });
          };

          curtain.remove = function () {
            surface.remove();
            tooltip.remove();
            select(window).on('resize.curtain', null);
          }; // ClientRects are immutable, so copy them to an object,
          // in case we need to trim the height/width.


          function copyBox(src) {
            return {
              top: src.top,
              right: src.right,
              bottom: src.bottom,
              left: src.left,
              width: src.width,
              height: src.height
            };
          }

          return curtain;
        }

        function uiIntroWelcome(context, reveal) {
          var dispatch = dispatch$8('done');
          var chapter = {
            title: 'intro.welcome.title'
          };

          function welcome() {
            context.map().centerZoom([-85.63591, 41.94285], 19);
            reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.welcome'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: practice
            });
          }

          function practice() {
            reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.practice'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: words
            });
          }

          function words() {
            reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.words'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: chapters
            });
          }

          function chapters() {
            dispatch.call('done');
            reveal('.intro-nav-wrap .chapter-navigation', helpHtml('intro.welcome.chapters', {
              next: _t('intro.navigation.title')
            }));
          }

          chapter.enter = function () {
            welcome();
          };

          chapter.exit = function () {
            context.container().select('.curtain-tooltip.intro-mouse').selectAll('.counter').remove();
          };

          chapter.restart = function () {
            chapter.exit();
            chapter.enter();
          };

          return utilRebind(chapter, dispatch, 'on');
        }

        function uiIntroNavigation(context, reveal) {
          var dispatch = dispatch$8('done');
          var timeouts = [];
          var hallId = 'n2061';
          var townHall = [-85.63591, 41.94285];
          var springStreetId = 'w397';
          var springStreetEndId = 'n1834';
          var springStreet = [-85.63582, 41.94255];
          var onewayField = _mainPresetIndex.field('oneway');
          var maxspeedField = _mainPresetIndex.field('maxspeed');
          var chapter = {
            title: 'intro.navigation.title'
          };

          function timeout(f, t) {
            timeouts.push(window.setTimeout(f, t));
          }

          function eventCancel(d3_event) {
            d3_event.stopPropagation();
            d3_event.preventDefault();
          }

          function isTownHallSelected() {
            var ids = context.selectedIDs();
            return ids.length === 1 && ids[0] === hallId;
          }

          function dragMap() {
            context.enter(modeBrowse(context));
            context.history().reset('initial');
            var msec = transitionTime(townHall, context.map().center());

            if (msec) {
              reveal(null, null, {
                duration: 0
              });
            }

            context.map().centerZoomEase(townHall, 19, msec);
            timeout(function () {
              var centerStart = context.map().center();
              var textId = context.lastPointerType() === 'mouse' ? 'drag' : 'drag_touch';
              var dragString = helpHtml('intro.navigation.map_info') + '{br}' + helpHtml('intro.navigation.' + textId);
              reveal('.surface', dragString);
              context.map().on('drawn.intro', function () {
                reveal('.surface', dragString, {
                  duration: 0
                });
              });
              context.map().on('move.intro', function () {
                var centerNow = context.map().center();

                if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
                  context.map().on('move.intro', null);
                  timeout(function () {
                    continueTo(zoomMap);
                  }, 3000);
                }
              });
            }, msec + 100);

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              nextStep();
            }
          }

          function zoomMap() {
            var zoomStart = context.map().zoom();
            var textId = context.lastPointerType() === 'mouse' ? 'zoom' : 'zoom_touch';
            var zoomString = helpHtml('intro.navigation.' + textId);
            reveal('.surface', zoomString);
            context.map().on('drawn.intro', function () {
              reveal('.surface', zoomString, {
                duration: 0
              });
            });
            context.map().on('move.intro', function () {
              if (context.map().zoom() !== zoomStart) {
                context.map().on('move.intro', null);
                timeout(function () {
                  continueTo(features);
                }, 3000);
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              nextStep();
            }
          }

          function features() {
            var onClick = function onClick() {
              continueTo(pointsLinesAreas);
            };

            reveal('.surface', helpHtml('intro.navigation.features'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: onClick
            });
            context.map().on('drawn.intro', function () {
              reveal('.surface', helpHtml('intro.navigation.features'), {
                duration: 0,
                buttonText: _t.html('intro.ok'),
                buttonCallback: onClick
              });
            });

            function continueTo(nextStep) {
              context.map().on('drawn.intro', null);
              nextStep();
            }
          }

          function pointsLinesAreas() {
            var onClick = function onClick() {
              continueTo(nodesWays);
            };

            reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: onClick
            });
            context.map().on('drawn.intro', function () {
              reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
                duration: 0,
                buttonText: _t.html('intro.ok'),
                buttonCallback: onClick
              });
            });

            function continueTo(nextStep) {
              context.map().on('drawn.intro', null);
              nextStep();
            }
          }

          function nodesWays() {
            var onClick = function onClick() {
              continueTo(clickTownHall);
            };

            reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: onClick
            });
            context.map().on('drawn.intro', function () {
              reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
                duration: 0,
                buttonText: _t.html('intro.ok'),
                buttonCallback: onClick
              });
            });

            function continueTo(nextStep) {
              context.map().on('drawn.intro', null);
              nextStep();
            }
          }

          function clickTownHall() {
            context.enter(modeBrowse(context));
            context.history().reset('initial');
            var entity = context.hasEntity(hallId);
            if (!entity) return;
            reveal(null, null, {
              duration: 0
            });
            context.map().centerZoomEase(entity.loc, 19, 500);
            timeout(function () {
              var entity = context.hasEntity(hallId);
              if (!entity) return;
              var box = pointBox(entity.loc, context);
              var textId = context.lastPointerType() === 'mouse' ? 'click_townhall' : 'tap_townhall';
              reveal(box, helpHtml('intro.navigation.' + textId));
              context.map().on('move.intro drawn.intro', function () {
                var entity = context.hasEntity(hallId);
                if (!entity) return;
                var box = pointBox(entity.loc, context);
                reveal(box, helpHtml('intro.navigation.' + textId), {
                  duration: 0
                });
              });
              context.on('enter.intro', function () {
                if (isTownHallSelected()) continueTo(selectedTownHall);
              });
            }, 550); // after centerZoomEase

            context.history().on('change.intro', function () {
              if (!context.hasEntity(hallId)) {
                continueTo(clickTownHall);
              }
            });

            function continueTo(nextStep) {
              context.on('enter.intro', null);
              context.map().on('move.intro drawn.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function selectedTownHall() {
            if (!isTownHallSelected()) return clickTownHall();
            var entity = context.hasEntity(hallId);
            if (!entity) return clickTownHall();
            var box = pointBox(entity.loc, context);

            var onClick = function onClick() {
              continueTo(editorTownHall);
            };

            reveal(box, helpHtml('intro.navigation.selected_townhall'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: onClick
            });
            context.map().on('move.intro drawn.intro', function () {
              var entity = context.hasEntity(hallId);
              if (!entity) return;
              var box = pointBox(entity.loc, context);
              reveal(box, helpHtml('intro.navigation.selected_townhall'), {
                duration: 0,
                buttonText: _t.html('intro.ok'),
                buttonCallback: onClick
              });
            });
            context.history().on('change.intro', function () {
              if (!context.hasEntity(hallId)) {
                continueTo(clickTownHall);
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function editorTownHall() {
            if (!isTownHallSelected()) return clickTownHall(); // disallow scrolling

            context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);

            var onClick = function onClick() {
              continueTo(presetTownHall);
            };

            reveal('.entity-editor-pane', helpHtml('intro.navigation.editor_townhall'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: onClick
            });
            context.on('exit.intro', function () {
              continueTo(clickTownHall);
            });
            context.history().on('change.intro', function () {
              if (!context.hasEntity(hallId)) {
                continueTo(clickTownHall);
              }
            });

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              context.history().on('change.intro', null);
              context.container().select('.inspector-wrap').on('wheel.intro', null);
              nextStep();
            }
          }

          function presetTownHall() {
            if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..

            context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling

            context.container().select('.inspector-wrap').on('wheel.intro', eventCancel); // preset match, in case the user happened to change it.

            var entity = context.entity(context.selectedIDs()[0]);
            var preset = _mainPresetIndex.match(entity, context.graph());

            var onClick = function onClick() {
              continueTo(fieldsTownHall);
            };

            reveal('.entity-editor-pane .section-feature-type', helpHtml('intro.navigation.preset_townhall', {
              preset: preset.name()
            }), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: onClick
            });
            context.on('exit.intro', function () {
              continueTo(clickTownHall);
            });
            context.history().on('change.intro', function () {
              if (!context.hasEntity(hallId)) {
                continueTo(clickTownHall);
              }
            });

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              context.history().on('change.intro', null);
              context.container().select('.inspector-wrap').on('wheel.intro', null);
              nextStep();
            }
          }

          function fieldsTownHall() {
            if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..

            context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling

            context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);

            var onClick = function onClick() {
              continueTo(closeTownHall);
            };

            reveal('.entity-editor-pane .section-preset-fields', helpHtml('intro.navigation.fields_townhall'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: onClick
            });
            context.on('exit.intro', function () {
              continueTo(clickTownHall);
            });
            context.history().on('change.intro', function () {
              if (!context.hasEntity(hallId)) {
                continueTo(clickTownHall);
              }
            });

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              context.history().on('change.intro', null);
              context.container().select('.inspector-wrap').on('wheel.intro', null);
              nextStep();
            }
          }

          function closeTownHall() {
            if (!isTownHallSelected()) return clickTownHall();
            var selector = '.entity-editor-pane button.close svg use';
            var href = select(selector).attr('href') || '#iD-icon-close';
            reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
              button: icon(href, 'inline')
            }));
            context.on('exit.intro', function () {
              continueTo(searchStreet);
            });
            context.history().on('change.intro', function () {
              // update the close icon in the tooltip if the user edits something.
              var selector = '.entity-editor-pane button.close svg use';
              var href = select(selector).attr('href') || '#iD-icon-close';
              reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
                button: icon(href, 'inline')
              }), {
                duration: 0
              });
            });

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function searchStreet() {
            context.enter(modeBrowse(context));
            context.history().reset('initial'); // ensure spring street exists

            var msec = transitionTime(springStreet, context.map().center());

            if (msec) {
              reveal(null, null, {
                duration: 0
              });
            }

            context.map().centerZoomEase(springStreet, 19, msec); // ..and user can see it

            timeout(function () {
              reveal('.search-header input', helpHtml('intro.navigation.search_street', {
                name: _t('intro.graph.name.spring-street')
              }));
              context.container().select('.search-header input').on('keyup.intro', checkSearchResult);
            }, msec + 100);
          }

          function checkSearchResult() {
            var first = context.container().select('.feature-list-item:nth-child(0n+2)'); // skip "No Results" item

            var firstName = first.select('.entity-name');
            var name = _t('intro.graph.name.spring-street');

            if (!firstName.empty() && firstName.html() === name) {
              reveal(first.node(), helpHtml('intro.navigation.choose_street', {
                name: name
              }), {
                duration: 300
              });
              context.on('exit.intro', function () {
                continueTo(selectedStreet);
              });
              context.container().select('.search-header input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
            }

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              context.container().select('.search-header input').on('keydown.intro', null).on('keyup.intro', null);
              nextStep();
            }
          }

          function selectedStreet() {
            if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
              return searchStreet();
            }

            var onClick = function onClick() {
              continueTo(editorStreet);
            };

            var entity = context.entity(springStreetEndId);
            var box = pointBox(entity.loc, context);
            box.height = 500;
            reveal(box, helpHtml('intro.navigation.selected_street', {
              name: _t('intro.graph.name.spring-street')
            }), {
              duration: 600,
              buttonText: _t.html('intro.ok'),
              buttonCallback: onClick
            });
            timeout(function () {
              context.map().on('move.intro drawn.intro', function () {
                var entity = context.hasEntity(springStreetEndId);
                if (!entity) return;
                var box = pointBox(entity.loc, context);
                box.height = 500;
                reveal(box, helpHtml('intro.navigation.selected_street', {
                  name: _t('intro.graph.name.spring-street')
                }), {
                  duration: 0,
                  buttonText: _t.html('intro.ok'),
                  buttonCallback: onClick
                });
              });
            }, 600); // after reveal.

            context.on('enter.intro', function (mode) {
              if (!context.hasEntity(springStreetId)) {
                return continueTo(searchStreet);
              }

              var ids = context.selectedIDs();

              if (mode.id !== 'select' || !ids.length || ids[0] !== springStreetId) {
                // keep Spring Street selected..
                context.enter(modeSelect(context, [springStreetId]));
              }
            });
            context.history().on('change.intro', function () {
              if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
                timeout(function () {
                  continueTo(searchStreet);
                }, 300); // after any transition (e.g. if user deleted intersection)
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function editorStreet() {
            var selector = '.entity-editor-pane button.close svg use';
            var href = select(selector).attr('href') || '#iD-icon-close';
            reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
              button: icon(href, 'inline'),
              field1: onewayField.label(),
              field2: maxspeedField.label()
            }));
            context.on('exit.intro', function () {
              continueTo(play);
            });
            context.history().on('change.intro', function () {
              // update the close icon in the tooltip if the user edits something.
              var selector = '.entity-editor-pane button.close svg use';
              var href = select(selector).attr('href') || '#iD-icon-close';
              reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
                button: icon(href, 'inline'),
                field1: onewayField.label(),
                field2: maxspeedField.label()
              }), {
                duration: 0
              });
            });

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function play() {
            dispatch.call('done');
            reveal('.ideditor', helpHtml('intro.navigation.play', {
              next: _t('intro.points.title')
            }), {
              tooltipBox: '.intro-nav-wrap .chapter-point',
              buttonText: _t.html('intro.ok'),
              buttonCallback: function buttonCallback() {
                reveal('.ideditor');
              }
            });
          }

          chapter.enter = function () {
            dragMap();
          };

          chapter.exit = function () {
            timeouts.forEach(window.clearTimeout);
            context.on('enter.intro exit.intro', null);
            context.map().on('move.intro drawn.intro', null);
            context.history().on('change.intro', null);
            context.container().select('.inspector-wrap').on('wheel.intro', null);
            context.container().select('.search-header input').on('keydown.intro keyup.intro', null);
          };

          chapter.restart = function () {
            chapter.exit();
            chapter.enter();
          };

          return utilRebind(chapter, dispatch, 'on');
        }

        function uiIntroPoint(context, reveal) {
          var dispatch = dispatch$8('done');
          var timeouts = [];
          var intersection = [-85.63279, 41.94394];
          var building = [-85.632422, 41.944045];
          var cafePreset = _mainPresetIndex.item('amenity/cafe');
          var _pointID = null;
          var chapter = {
            title: 'intro.points.title'
          };

          function timeout(f, t) {
            timeouts.push(window.setTimeout(f, t));
          }

          function eventCancel(d3_event) {
            d3_event.stopPropagation();
            d3_event.preventDefault();
          }

          function addPoint() {
            context.enter(modeBrowse(context));
            context.history().reset('initial');
            var msec = transitionTime(intersection, context.map().center());

            if (msec) {
              reveal(null, null, {
                duration: 0
              });
            }

            context.map().centerZoomEase(intersection, 19, msec);
            timeout(function () {
              var tooltip = reveal('button.add-point', helpHtml('intro.points.points_info') + '{br}' + helpHtml('intro.points.add_point'));
              _pointID = null;
              tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-points');
              context.on('enter.intro', function (mode) {
                if (mode.id !== 'add-point') return;
                continueTo(placePoint);
              });
            }, msec + 100);

            function continueTo(nextStep) {
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function placePoint() {
            if (context.mode().id !== 'add-point') {
              return chapter.restart();
            }

            var pointBox = pad(building, 150, context);
            var textId = context.lastPointerType() === 'mouse' ? 'place_point' : 'place_point_touch';
            reveal(pointBox, helpHtml('intro.points.' + textId));
            context.map().on('move.intro drawn.intro', function () {
              pointBox = pad(building, 150, context);
              reveal(pointBox, helpHtml('intro.points.' + textId), {
                duration: 0
              });
            });
            context.on('enter.intro', function (mode) {
              if (mode.id !== 'select') return chapter.restart();
              _pointID = context.mode().selectedIDs()[0];
              continueTo(searchPreset);
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function searchPreset() {
            if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
              return addPoint();
            } // disallow scrolling


            context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
            context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
            reveal('.preset-search-input', helpHtml('intro.points.search_cafe', {
              preset: cafePreset.name()
            }));
            context.on('enter.intro', function (mode) {
              if (!_pointID || !context.hasEntity(_pointID)) {
                return continueTo(addPoint);
              }

              var ids = context.selectedIDs();

              if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
                // keep the user's point selected..
                context.enter(modeSelect(context, [_pointID])); // disallow scrolling

                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
                context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
                reveal('.preset-search-input', helpHtml('intro.points.search_cafe', {
                  preset: cafePreset.name()
                }));
                context.history().on('change.intro', null);
              }
            });

            function checkPresetSearch() {
              var first = context.container().select('.preset-list-item:first-child');

              if (first.classed('preset-amenity-cafe')) {
                context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
                reveal(first.select('.preset-list-button').node(), helpHtml('intro.points.choose_cafe', {
                  preset: cafePreset.name()
                }), {
                  duration: 300
                });
                context.history().on('change.intro', function () {
                  continueTo(aboutFeatureEditor);
                });
              }
            }

            function continueTo(nextStep) {
              context.on('enter.intro', null);
              context.history().on('change.intro', null);
              context.container().select('.inspector-wrap').on('wheel.intro', null);
              context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
              nextStep();
            }
          }

          function aboutFeatureEditor() {
            if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
              return addPoint();
            }

            timeout(function () {
              reveal('.entity-editor-pane', helpHtml('intro.points.feature_editor'), {
                tooltipClass: 'intro-points-describe',
                buttonText: _t.html('intro.ok'),
                buttonCallback: function buttonCallback() {
                  continueTo(addName);
                }
              });
            }, 400);
            context.on('exit.intro', function () {
              // if user leaves select mode here, just continue with the tutorial.
              continueTo(reselectPoint);
            });

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              nextStep();
            }
          }

          function addName() {
            if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
              return addPoint();
            } // reset pane, in case user happened to change it..


            context.container().select('.inspector-wrap .panewrap').style('right', '0%');
            var addNameString = helpHtml('intro.points.fields_info') + '{br}' + helpHtml('intro.points.add_name');
            timeout(function () {
              // It's possible for the user to add a name in a previous step..
              // If so, don't tell them to add the name in this step.
              // Give them an OK button instead.
              var entity = context.entity(_pointID);

              if (entity.tags.name) {
                var tooltip = reveal('.entity-editor-pane', addNameString, {
                  tooltipClass: 'intro-points-describe',
                  buttonText: _t.html('intro.ok'),
                  buttonCallback: function buttonCallback() {
                    continueTo(addCloseEditor);
                  }
                });
                tooltip.select('.instruction').style('display', 'none');
              } else {
                reveal('.entity-editor-pane', addNameString, {
                  tooltipClass: 'intro-points-describe'
                });
              }
            }, 400);
            context.history().on('change.intro', function () {
              continueTo(addCloseEditor);
            });
            context.on('exit.intro', function () {
              // if user leaves select mode here, just continue with the tutorial.
              continueTo(reselectPoint);
            });

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function addCloseEditor() {
            // reset pane, in case user happened to change it..
            context.container().select('.inspector-wrap .panewrap').style('right', '0%');
            var selector = '.entity-editor-pane button.close svg use';
            var href = select(selector).attr('href') || '#iD-icon-close';
            context.on('exit.intro', function () {
              continueTo(reselectPoint);
            });
            reveal('.entity-editor-pane', helpHtml('intro.points.add_close', {
              button: icon(href, 'inline')
            }));

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              nextStep();
            }
          }

          function reselectPoint() {
            if (!_pointID) return chapter.restart();
            var entity = context.hasEntity(_pointID);
            if (!entity) return chapter.restart(); // make sure it's still a cafe, in case user somehow changed it..

            var oldPreset = _mainPresetIndex.match(entity, context.graph());
            context.replace(actionChangePreset(_pointID, oldPreset, cafePreset));
            context.enter(modeBrowse(context));
            var msec = transitionTime(entity.loc, context.map().center());

            if (msec) {
              reveal(null, null, {
                duration: 0
              });
            }

            context.map().centerEase(entity.loc, msec);
            timeout(function () {
              var box = pointBox(entity.loc, context);
              reveal(box, helpHtml('intro.points.reselect'), {
                duration: 600
              });
              timeout(function () {
                context.map().on('move.intro drawn.intro', function () {
                  var entity = context.hasEntity(_pointID);
                  if (!entity) return chapter.restart();
                  var box = pointBox(entity.loc, context);
                  reveal(box, helpHtml('intro.points.reselect'), {
                    duration: 0
                  });
                });
              }, 600); // after reveal..

              context.on('enter.intro', function (mode) {
                if (mode.id !== 'select') return;
                continueTo(updatePoint);
              });
            }, msec + 100);

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function updatePoint() {
            if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
              return continueTo(reselectPoint);
            } // reset pane, in case user happened to untag the point..


            context.container().select('.inspector-wrap .panewrap').style('right', '0%');
            context.on('exit.intro', function () {
              continueTo(reselectPoint);
            });
            context.history().on('change.intro', function () {
              continueTo(updateCloseEditor);
            });
            timeout(function () {
              reveal('.entity-editor-pane', helpHtml('intro.points.update'), {
                tooltipClass: 'intro-points-describe'
              });
            }, 400);

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function updateCloseEditor() {
            if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
              return continueTo(reselectPoint);
            } // reset pane, in case user happened to change it..


            context.container().select('.inspector-wrap .panewrap').style('right', '0%');
            context.on('exit.intro', function () {
              continueTo(rightClickPoint);
            });
            timeout(function () {
              reveal('.entity-editor-pane', helpHtml('intro.points.update_close', {
                button: icon('#iD-icon-close', 'inline')
              }));
            }, 500);

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              nextStep();
            }
          }

          function rightClickPoint() {
            if (!_pointID) return chapter.restart();
            var entity = context.hasEntity(_pointID);
            if (!entity) return chapter.restart();
            context.enter(modeBrowse(context));
            var box = pointBox(entity.loc, context);
            var textId = context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch';
            reveal(box, helpHtml('intro.points.' + textId), {
              duration: 600
            });
            timeout(function () {
              context.map().on('move.intro', function () {
                var entity = context.hasEntity(_pointID);
                if (!entity) return chapter.restart();
                var box = pointBox(entity.loc, context);
                reveal(box, helpHtml('intro.points.' + textId), {
                  duration: 0
                });
              });
            }, 600); // after reveal

            context.on('enter.intro', function (mode) {
              if (mode.id !== 'select') return;
              var ids = context.selectedIDs();
              if (ids.length !== 1 || ids[0] !== _pointID) return;
              timeout(function () {
                var node = selectMenuItem(context, 'delete').node();
                if (!node) return;
                continueTo(enterDelete);
              }, 50); // after menu visible
            });

            function continueTo(nextStep) {
              context.on('enter.intro', null);
              context.map().on('move.intro', null);
              nextStep();
            }
          }

          function enterDelete() {
            if (!_pointID) return chapter.restart();
            var entity = context.hasEntity(_pointID);
            if (!entity) return chapter.restart();
            var node = selectMenuItem(context, 'delete').node();

            if (!node) {
              return continueTo(rightClickPoint);
            }

            reveal('.edit-menu', helpHtml('intro.points.delete'), {
              padding: 50
            });
            timeout(function () {
              context.map().on('move.intro', function () {
                reveal('.edit-menu', helpHtml('intro.points.delete'), {
                  duration: 0,
                  padding: 50
                });
              });
            }, 300); // after menu visible

            context.on('exit.intro', function () {
              if (!_pointID) return chapter.restart();
              var entity = context.hasEntity(_pointID);
              if (entity) return continueTo(rightClickPoint); // point still exists
            });
            context.history().on('change.intro', function (changed) {
              if (changed.deleted().length) {
                continueTo(undo);
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro', null);
              context.history().on('change.intro', null);
              context.on('exit.intro', null);
              nextStep();
            }
          }

          function undo() {
            context.history().on('change.intro', function () {
              continueTo(play);
            });
            reveal('.top-toolbar button.undo-button', helpHtml('intro.points.undo'));

            function continueTo(nextStep) {
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function play() {
            dispatch.call('done');
            reveal('.ideditor', helpHtml('intro.points.play', {
              next: _t('intro.areas.title')
            }), {
              tooltipBox: '.intro-nav-wrap .chapter-area',
              buttonText: _t.html('intro.ok'),
              buttonCallback: function buttonCallback() {
                reveal('.ideditor');
              }
            });
          }

          chapter.enter = function () {
            addPoint();
          };

          chapter.exit = function () {
            timeouts.forEach(window.clearTimeout);
            context.on('enter.intro exit.intro', null);
            context.map().on('move.intro drawn.intro', null);
            context.history().on('change.intro', null);
            context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
            context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
          };

          chapter.restart = function () {
            chapter.exit();
            chapter.enter();
          };

          return utilRebind(chapter, dispatch, 'on');
        }

        function uiIntroArea(context, reveal) {
          var dispatch = dispatch$8('done');
          var playground = [-85.63552, 41.94159];
          var playgroundPreset = _mainPresetIndex.item('leisure/playground');
          var nameField = _mainPresetIndex.field('name');
          var descriptionField = _mainPresetIndex.field('description');
          var timeouts = [];

          var _areaID;

          var chapter = {
            title: 'intro.areas.title'
          };

          function timeout(f, t) {
            timeouts.push(window.setTimeout(f, t));
          }

          function eventCancel(d3_event) {
            d3_event.stopPropagation();
            d3_event.preventDefault();
          }

          function revealPlayground(center, text, options) {
            var padding = 180 * Math.pow(2, context.map().zoom() - 19.5);
            var box = pad(center, padding, context);
            reveal(box, text, options);
          }

          function addArea() {
            context.enter(modeBrowse(context));
            context.history().reset('initial');
            _areaID = null;
            var msec = transitionTime(playground, context.map().center());

            if (msec) {
              reveal(null, null, {
                duration: 0
              });
            }

            context.map().centerZoomEase(playground, 19, msec);
            timeout(function () {
              var tooltip = reveal('button.add-area', helpHtml('intro.areas.add_playground'));
              tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-areas');
              context.on('enter.intro', function (mode) {
                if (mode.id !== 'add-area') return;
                continueTo(startPlayground);
              });
            }, msec + 100);

            function continueTo(nextStep) {
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function startPlayground() {
            if (context.mode().id !== 'add-area') {
              return chapter.restart();
            }

            _areaID = null;
            context.map().zoomEase(19.5, 500);
            timeout(function () {
              var textId = context.lastPointerType() === 'mouse' ? 'starting_node_click' : 'starting_node_tap';
              var startDrawString = helpHtml('intro.areas.start_playground') + helpHtml('intro.areas.' + textId);
              revealPlayground(playground, startDrawString, {
                duration: 250
              });
              timeout(function () {
                context.map().on('move.intro drawn.intro', function () {
                  revealPlayground(playground, startDrawString, {
                    duration: 0
                  });
                });
                context.on('enter.intro', function (mode) {
                  if (mode.id !== 'draw-area') return chapter.restart();
                  continueTo(continuePlayground);
                });
              }, 250); // after reveal
            }, 550); // after easing

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function continuePlayground() {
            if (context.mode().id !== 'draw-area') {
              return chapter.restart();
            }

            _areaID = null;
            revealPlayground(playground, helpHtml('intro.areas.continue_playground'), {
              duration: 250
            });
            timeout(function () {
              context.map().on('move.intro drawn.intro', function () {
                revealPlayground(playground, helpHtml('intro.areas.continue_playground'), {
                  duration: 0
                });
              });
            }, 250); // after reveal

            context.on('enter.intro', function (mode) {
              if (mode.id === 'draw-area') {
                var entity = context.hasEntity(context.selectedIDs()[0]);

                if (entity && entity.nodes.length >= 6) {
                  return continueTo(finishPlayground);
                } else {
                  return;
                }
              } else if (mode.id === 'select') {
                _areaID = context.selectedIDs()[0];
                return continueTo(searchPresets);
              } else {
                return chapter.restart();
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function finishPlayground() {
            if (context.mode().id !== 'draw-area') {
              return chapter.restart();
            }

            _areaID = null;
            var finishString = helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.areas.finish_playground');
            revealPlayground(playground, finishString, {
              duration: 250
            });
            timeout(function () {
              context.map().on('move.intro drawn.intro', function () {
                revealPlayground(playground, finishString, {
                  duration: 0
                });
              });
            }, 250); // after reveal

            context.on('enter.intro', function (mode) {
              if (mode.id === 'draw-area') {
                return;
              } else if (mode.id === 'select') {
                _areaID = context.selectedIDs()[0];
                return continueTo(searchPresets);
              } else {
                return chapter.restart();
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function searchPresets() {
            if (!_areaID || !context.hasEntity(_areaID)) {
              return addArea();
            }

            var ids = context.selectedIDs();

            if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
              context.enter(modeSelect(context, [_areaID]));
            } // disallow scrolling


            context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
            timeout(function () {
              // reset pane, in case user somehow happened to change it..
              context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
              context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
              reveal('.preset-search-input', helpHtml('intro.areas.search_playground', {
                preset: playgroundPreset.name()
              }));
            }, 400); // after preset list pane visible..

            context.on('enter.intro', function (mode) {
              if (!_areaID || !context.hasEntity(_areaID)) {
                return continueTo(addArea);
              }

              var ids = context.selectedIDs();

              if (mode.id !== 'select' || !ids.length || ids[0] !== _areaID) {
                // keep the user's area selected..
                context.enter(modeSelect(context, [_areaID])); // reset pane, in case user somehow happened to change it..

                context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling

                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
                context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
                reveal('.preset-search-input', helpHtml('intro.areas.search_playground', {
                  preset: playgroundPreset.name()
                }));
                context.history().on('change.intro', null);
              }
            });

            function checkPresetSearch() {
              var first = context.container().select('.preset-list-item:first-child');

              if (first.classed('preset-leisure-playground')) {
                reveal(first.select('.preset-list-button').node(), helpHtml('intro.areas.choose_playground', {
                  preset: playgroundPreset.name()
                }), {
                  duration: 300
                });
                context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
                context.history().on('change.intro', function () {
                  continueTo(clickAddField);
                });
              }
            }

            function continueTo(nextStep) {
              context.container().select('.inspector-wrap').on('wheel.intro', null);
              context.on('enter.intro', null);
              context.history().on('change.intro', null);
              context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
              nextStep();
            }
          }

          function clickAddField() {
            if (!_areaID || !context.hasEntity(_areaID)) {
              return addArea();
            }

            var ids = context.selectedIDs();

            if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
              return searchPresets();
            }

            if (!context.container().select('.form-field-description').empty()) {
              return continueTo(describePlayground);
            } // disallow scrolling


            context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
            timeout(function () {
              // reset pane, in case user somehow happened to change it..
              context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // It's possible for the user to add a description in a previous step..
              // If they did this already, just continue to next step.

              var entity = context.entity(_areaID);

              if (entity.tags.description) {
                return continueTo(play);
              } // scroll "Add field" into view


              var box = context.container().select('.more-fields').node().getBoundingClientRect();

              if (box.top > 300) {
                var pane = context.container().select('.entity-editor-pane .inspector-body');
                var start = pane.node().scrollTop;
                var end = start + (box.top - 300);
                pane.transition().duration(250).tween('scroll.inspector', function () {
                  var node = this;
                  var i = d3_interpolateNumber(start, end);
                  return function (t) {
                    node.scrollTop = i(t);
                  };
                });
              }

              timeout(function () {
                reveal('.more-fields .combobox-input', helpHtml('intro.areas.add_field', {
                  name: nameField.label(),
                  description: descriptionField.label()
                }), {
                  duration: 300
                });
                context.container().select('.more-fields .combobox-input').on('click.intro', function () {
                  // Watch for the combobox to appear...
                  var watcher;
                  watcher = window.setInterval(function () {
                    if (!context.container().select('div.combobox').empty()) {
                      window.clearInterval(watcher);
                      continueTo(chooseDescriptionField);
                    }
                  }, 300);
                });
              }, 300); // after "Add Field" visible
            }, 400); // after editor pane visible

            context.on('exit.intro', function () {
              return continueTo(searchPresets);
            });

            function continueTo(nextStep) {
              context.container().select('.inspector-wrap').on('wheel.intro', null);
              context.container().select('.more-fields .combobox-input').on('click.intro', null);
              context.on('exit.intro', null);
              nextStep();
            }
          }

          function chooseDescriptionField() {
            if (!_areaID || !context.hasEntity(_areaID)) {
              return addArea();
            }

            var ids = context.selectedIDs();

            if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
              return searchPresets();
            }

            if (!context.container().select('.form-field-description').empty()) {
              return continueTo(describePlayground);
            } // Make sure combobox is ready..


            if (context.container().select('div.combobox').empty()) {
              return continueTo(clickAddField);
            } // Watch for the combobox to go away..


            var watcher;
            watcher = window.setInterval(function () {
              if (context.container().select('div.combobox').empty()) {
                window.clearInterval(watcher);
                timeout(function () {
                  if (context.container().select('.form-field-description').empty()) {
                    continueTo(retryChooseDescription);
                  } else {
                    continueTo(describePlayground);
                  }
                }, 300); // after description field added.
              }
            }, 300);
            reveal('div.combobox', helpHtml('intro.areas.choose_field', {
              field: descriptionField.label()
            }), {
              duration: 300
            });
            context.on('exit.intro', function () {
              return continueTo(searchPresets);
            });

            function continueTo(nextStep) {
              if (watcher) window.clearInterval(watcher);
              context.on('exit.intro', null);
              nextStep();
            }
          }

          function describePlayground() {
            if (!_areaID || !context.hasEntity(_areaID)) {
              return addArea();
            }

            var ids = context.selectedIDs();

            if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
              return searchPresets();
            } // reset pane, in case user happened to change it..


            context.container().select('.inspector-wrap .panewrap').style('right', '0%');

            if (context.container().select('.form-field-description').empty()) {
              return continueTo(retryChooseDescription);
            }

            context.on('exit.intro', function () {
              continueTo(play);
            });
            reveal('.entity-editor-pane', helpHtml('intro.areas.describe_playground', {
              button: icon('#iD-icon-close', 'inline')
            }), {
              duration: 300
            });

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              nextStep();
            }
          }

          function retryChooseDescription() {
            if (!_areaID || !context.hasEntity(_areaID)) {
              return addArea();
            }

            var ids = context.selectedIDs();

            if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
              return searchPresets();
            } // reset pane, in case user happened to change it..


            context.container().select('.inspector-wrap .panewrap').style('right', '0%');
            reveal('.entity-editor-pane', helpHtml('intro.areas.retry_add_field', {
              field: descriptionField.label()
            }), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: function buttonCallback() {
                continueTo(clickAddField);
              }
            });
            context.on('exit.intro', function () {
              return continueTo(searchPresets);
            });

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              nextStep();
            }
          }

          function play() {
            dispatch.call('done');
            reveal('.ideditor', helpHtml('intro.areas.play', {
              next: _t('intro.lines.title')
            }), {
              tooltipBox: '.intro-nav-wrap .chapter-line',
              buttonText: _t.html('intro.ok'),
              buttonCallback: function buttonCallback() {
                reveal('.ideditor');
              }
            });
          }

          chapter.enter = function () {
            addArea();
          };

          chapter.exit = function () {
            timeouts.forEach(window.clearTimeout);
            context.on('enter.intro exit.intro', null);
            context.map().on('move.intro drawn.intro', null);
            context.history().on('change.intro', null);
            context.container().select('.inspector-wrap').on('wheel.intro', null);
            context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
            context.container().select('.more-fields .combobox-input').on('click.intro', null);
          };

          chapter.restart = function () {
            chapter.exit();
            chapter.enter();
          };

          return utilRebind(chapter, dispatch, 'on');
        }

        function uiIntroLine(context, reveal) {
          var dispatch = dispatch$8('done');
          var timeouts = [];
          var _tulipRoadID = null;
          var flowerRoadID = 'w646';
          var tulipRoadStart = [-85.6297754121684, 41.95805253325314];
          var tulipRoadMidpoint = [-85.62975395449628, 41.95787501510204];
          var tulipRoadIntersection = [-85.62974496187628, 41.95742515554585];
          var roadCategory = _mainPresetIndex.item('category-road_minor');
          var residentialPreset = _mainPresetIndex.item('highway/residential');
          var woodRoadID = 'w525';
          var woodRoadEndID = 'n2862';
          var woodRoadAddNode = [-85.62390110349587, 41.95397111462291];
          var woodRoadDragEndpoint = [-85.623867390213, 41.95466987786487];
          var woodRoadDragMidpoint = [-85.62386254803509, 41.95430395953872];
          var washingtonStreetID = 'w522';
          var twelfthAvenueID = 'w1';
          var eleventhAvenueEndID = 'n3550';
          var twelfthAvenueEndID = 'n5';
          var _washingtonSegmentID = null;
          var eleventhAvenueEnd = context.entity(eleventhAvenueEndID).loc;
          var twelfthAvenueEnd = context.entity(twelfthAvenueEndID).loc;
          var deleteLinesLoc = [-85.6219395542764, 41.95228033922477];
          var twelfthAvenue = [-85.62219310052491, 41.952505413152956];
          var chapter = {
            title: 'intro.lines.title'
          };

          function timeout(f, t) {
            timeouts.push(window.setTimeout(f, t));
          }

          function eventCancel(d3_event) {
            d3_event.stopPropagation();
            d3_event.preventDefault();
          }

          function addLine() {
            context.enter(modeBrowse(context));
            context.history().reset('initial');
            var msec = transitionTime(tulipRoadStart, context.map().center());

            if (msec) {
              reveal(null, null, {
                duration: 0
              });
            }

            context.map().centerZoomEase(tulipRoadStart, 18.5, msec);
            timeout(function () {
              var tooltip = reveal('button.add-line', helpHtml('intro.lines.add_line'));
              tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-lines');
              context.on('enter.intro', function (mode) {
                if (mode.id !== 'add-line') return;
                continueTo(startLine);
              });
            }, msec + 100);

            function continueTo(nextStep) {
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function startLine() {
            if (context.mode().id !== 'add-line') return chapter.restart();
            _tulipRoadID = null;
            var padding = 70 * Math.pow(2, context.map().zoom() - 18);
            var box = pad(tulipRoadStart, padding, context);
            box.height = box.height + 100;
            var textId = context.lastPointerType() === 'mouse' ? 'start_line' : 'start_line_tap';
            var startLineString = helpHtml('intro.lines.missing_road') + '{br}' + helpHtml('intro.lines.line_draw_info') + helpHtml('intro.lines.' + textId);
            reveal(box, startLineString);
            context.map().on('move.intro drawn.intro', function () {
              padding = 70 * Math.pow(2, context.map().zoom() - 18);
              box = pad(tulipRoadStart, padding, context);
              box.height = box.height + 100;
              reveal(box, startLineString, {
                duration: 0
              });
            });
            context.on('enter.intro', function (mode) {
              if (mode.id !== 'draw-line') return chapter.restart();
              continueTo(drawLine);
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function drawLine() {
            if (context.mode().id !== 'draw-line') return chapter.restart();
            _tulipRoadID = context.mode().selectedIDs()[0];
            context.map().centerEase(tulipRoadMidpoint, 500);
            timeout(function () {
              var padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
              var box = pad(tulipRoadMidpoint, padding, context);
              box.height = box.height * 2;
              reveal(box, helpHtml('intro.lines.intersect', {
                name: _t('intro.graph.name.flower-street')
              }));
              context.map().on('move.intro drawn.intro', function () {
                padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
                box = pad(tulipRoadMidpoint, padding, context);
                box.height = box.height * 2;
                reveal(box, helpHtml('intro.lines.intersect', {
                  name: _t('intro.graph.name.flower-street')
                }), {
                  duration: 0
                });
              });
            }, 550); // after easing..

            context.history().on('change.intro', function () {
              if (isLineConnected()) {
                continueTo(continueLine);
              }
            });
            context.on('enter.intro', function (mode) {
              if (mode.id === 'draw-line') {
                return;
              } else if (mode.id === 'select') {
                continueTo(retryIntersect);
                return;
              } else {
                return chapter.restart();
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.history().on('change.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function isLineConnected() {
            var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);

            if (!entity) return false;
            var drawNodes = context.graph().childNodes(entity);
            return drawNodes.some(function (node) {
              return context.graph().parentWays(node).some(function (parent) {
                return parent.id === flowerRoadID;
              });
            });
          }

          function retryIntersect() {
            select(window).on('pointerdown.intro mousedown.intro', eventCancel, true);
            var box = pad(tulipRoadIntersection, 80, context);
            reveal(box, helpHtml('intro.lines.retry_intersect', {
              name: _t('intro.graph.name.flower-street')
            }));
            timeout(chapter.restart, 3000);
          }

          function continueLine() {
            if (context.mode().id !== 'draw-line') return chapter.restart();

            var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);

            if (!entity) return chapter.restart();
            context.map().centerEase(tulipRoadIntersection, 500);
            var continueLineText = helpHtml('intro.lines.continue_line') + '{br}' + helpHtml('intro.lines.finish_line_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.lines.finish_road');
            reveal('.surface', continueLineText);
            context.on('enter.intro', function (mode) {
              if (mode.id === 'draw-line') {
                return;
              } else if (mode.id === 'select') {
                return continueTo(chooseCategoryRoad);
              } else {
                return chapter.restart();
              }
            });

            function continueTo(nextStep) {
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function chooseCategoryRoad() {
            if (context.mode().id !== 'select') return chapter.restart();
            context.on('exit.intro', function () {
              return chapter.restart();
            });
            var button = context.container().select('.preset-category-road_minor .preset-list-button');
            if (button.empty()) return chapter.restart(); // disallow scrolling

            context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
            timeout(function () {
              // reset pane, in case user somehow happened to change it..
              context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
              reveal(button.node(), helpHtml('intro.lines.choose_category_road', {
                category: roadCategory.name()
              }));
              button.on('click.intro', function () {
                continueTo(choosePresetResidential);
              });
            }, 400); // after editor pane visible

            function continueTo(nextStep) {
              context.container().select('.inspector-wrap').on('wheel.intro', null);
              context.container().select('.preset-list-button').on('click.intro', null);
              context.on('exit.intro', null);
              nextStep();
            }
          }

          function choosePresetResidential() {
            if (context.mode().id !== 'select') return chapter.restart();
            context.on('exit.intro', function () {
              return chapter.restart();
            });
            var subgrid = context.container().select('.preset-category-road_minor .subgrid');
            if (subgrid.empty()) return chapter.restart();
            subgrid.selectAll(':not(.preset-highway-residential) .preset-list-button').on('click.intro', function () {
              continueTo(retryPresetResidential);
            });
            subgrid.selectAll('.preset-highway-residential .preset-list-button').on('click.intro', function () {
              continueTo(nameRoad);
            });
            timeout(function () {
              reveal(subgrid.node(), helpHtml('intro.lines.choose_preset_residential', {
                preset: residentialPreset.name()
              }), {
                tooltipBox: '.preset-highway-residential .preset-list-button',
                duration: 300
              });
            }, 300);

            function continueTo(nextStep) {
              context.container().select('.preset-list-button').on('click.intro', null);
              context.on('exit.intro', null);
              nextStep();
            }
          } // selected wrong road type


          function retryPresetResidential() {
            if (context.mode().id !== 'select') return chapter.restart();
            context.on('exit.intro', function () {
              return chapter.restart();
            }); // disallow scrolling

            context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
            timeout(function () {
              var button = context.container().select('.entity-editor-pane .preset-list-button');
              reveal(button.node(), helpHtml('intro.lines.retry_preset_residential', {
                preset: residentialPreset.name()
              }));
              button.on('click.intro', function () {
                continueTo(chooseCategoryRoad);
              });
            }, 500);

            function continueTo(nextStep) {
              context.container().select('.inspector-wrap').on('wheel.intro', null);
              context.container().select('.preset-list-button').on('click.intro', null);
              context.on('exit.intro', null);
              nextStep();
            }
          }

          function nameRoad() {
            context.on('exit.intro', function () {
              continueTo(didNameRoad);
            });
            timeout(function () {
              reveal('.entity-editor-pane', helpHtml('intro.lines.name_road', {
                button: icon('#iD-icon-close', 'inline')
              }), {
                tooltipClass: 'intro-lines-name_road'
              });
            }, 500);

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              nextStep();
            }
          }

          function didNameRoad() {
            context.history().checkpoint('doneAddLine');
            timeout(function () {
              reveal('.surface', helpHtml('intro.lines.did_name_road'), {
                buttonText: _t.html('intro.ok'),
                buttonCallback: function buttonCallback() {
                  continueTo(updateLine);
                }
              });
            }, 500);

            function continueTo(nextStep) {
              nextStep();
            }
          }

          function updateLine() {
            context.history().reset('doneAddLine');

            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
              return chapter.restart();
            }

            var msec = transitionTime(woodRoadDragMidpoint, context.map().center());

            if (msec) {
              reveal(null, null, {
                duration: 0
              });
            }

            context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
            timeout(function () {
              var padding = 250 * Math.pow(2, context.map().zoom() - 19);
              var box = pad(woodRoadDragMidpoint, padding, context);

              var advance = function advance() {
                continueTo(addNode);
              };

              reveal(box, helpHtml('intro.lines.update_line'), {
                buttonText: _t.html('intro.ok'),
                buttonCallback: advance
              });
              context.map().on('move.intro drawn.intro', function () {
                var padding = 250 * Math.pow(2, context.map().zoom() - 19);
                var box = pad(woodRoadDragMidpoint, padding, context);
                reveal(box, helpHtml('intro.lines.update_line'), {
                  duration: 0,
                  buttonText: _t.html('intro.ok'),
                  buttonCallback: advance
                });
              });
            }, msec + 100);

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              nextStep();
            }
          }

          function addNode() {
            context.history().reset('doneAddLine');

            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
              return chapter.restart();
            }

            var padding = 40 * Math.pow(2, context.map().zoom() - 19);
            var box = pad(woodRoadAddNode, padding, context);
            var addNodeString = helpHtml('intro.lines.add_node' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
            reveal(box, addNodeString);
            context.map().on('move.intro drawn.intro', function () {
              var padding = 40 * Math.pow(2, context.map().zoom() - 19);
              var box = pad(woodRoadAddNode, padding, context);
              reveal(box, addNodeString, {
                duration: 0
              });
            });
            context.history().on('change.intro', function (changed) {
              if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
                return continueTo(updateLine);
              }

              if (changed.created().length === 1) {
                timeout(function () {
                  continueTo(startDragEndpoint);
                }, 500);
              }
            });
            context.on('enter.intro', function (mode) {
              if (mode.id !== 'select') {
                continueTo(updateLine);
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.history().on('change.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function startDragEndpoint() {
            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
              return continueTo(updateLine);
            }

            var padding = 100 * Math.pow(2, context.map().zoom() - 19);
            var box = pad(woodRoadDragEndpoint, padding, context);
            var startDragString = helpHtml('intro.lines.start_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch')) + helpHtml('intro.lines.drag_to_intersection');
            reveal(box, startDragString);
            context.map().on('move.intro drawn.intro', function () {
              if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
                return continueTo(updateLine);
              }

              var padding = 100 * Math.pow(2, context.map().zoom() - 19);
              var box = pad(woodRoadDragEndpoint, padding, context);
              reveal(box, startDragString, {
                duration: 0
              });
              var entity = context.entity(woodRoadEndID);

              if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
                continueTo(finishDragEndpoint);
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              nextStep();
            }
          }

          function finishDragEndpoint() {
            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
              return continueTo(updateLine);
            }

            var padding = 100 * Math.pow(2, context.map().zoom() - 19);
            var box = pad(woodRoadDragEndpoint, padding, context);
            var finishDragString = helpHtml('intro.lines.spot_looks_good') + helpHtml('intro.lines.finish_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
            reveal(box, finishDragString);
            context.map().on('move.intro drawn.intro', function () {
              if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
                return continueTo(updateLine);
              }

              var padding = 100 * Math.pow(2, context.map().zoom() - 19);
              var box = pad(woodRoadDragEndpoint, padding, context);
              reveal(box, finishDragString, {
                duration: 0
              });
              var entity = context.entity(woodRoadEndID);

              if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
                continueTo(startDragEndpoint);
              }
            });
            context.on('enter.intro', function () {
              continueTo(startDragMidpoint);
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function startDragMidpoint() {
            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
              return continueTo(updateLine);
            }

            if (context.selectedIDs().indexOf(woodRoadID) === -1) {
              context.enter(modeSelect(context, [woodRoadID]));
            }

            var padding = 80 * Math.pow(2, context.map().zoom() - 19);
            var box = pad(woodRoadDragMidpoint, padding, context);
            reveal(box, helpHtml('intro.lines.start_drag_midpoint'));
            context.map().on('move.intro drawn.intro', function () {
              if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
                return continueTo(updateLine);
              }

              var padding = 80 * Math.pow(2, context.map().zoom() - 19);
              var box = pad(woodRoadDragMidpoint, padding, context);
              reveal(box, helpHtml('intro.lines.start_drag_midpoint'), {
                duration: 0
              });
            });
            context.history().on('change.intro', function (changed) {
              if (changed.created().length === 1) {
                continueTo(continueDragMidpoint);
              }
            });
            context.on('enter.intro', function (mode) {
              if (mode.id !== 'select') {
                // keep Wood Road selected so midpoint triangles are drawn..
                context.enter(modeSelect(context, [woodRoadID]));
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.history().on('change.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function continueDragMidpoint() {
            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
              return continueTo(updateLine);
            }

            var padding = 100 * Math.pow(2, context.map().zoom() - 19);
            var box = pad(woodRoadDragEndpoint, padding, context);
            box.height += 400;

            var advance = function advance() {
              context.history().checkpoint('doneUpdateLine');
              continueTo(deleteLines);
            };

            reveal(box, helpHtml('intro.lines.continue_drag_midpoint'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: advance
            });
            context.map().on('move.intro drawn.intro', function () {
              if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
                return continueTo(updateLine);
              }

              var padding = 100 * Math.pow(2, context.map().zoom() - 19);
              var box = pad(woodRoadDragEndpoint, padding, context);
              box.height += 400;
              reveal(box, helpHtml('intro.lines.continue_drag_midpoint'), {
                duration: 0,
                buttonText: _t.html('intro.ok'),
                buttonCallback: advance
              });
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              nextStep();
            }
          }

          function deleteLines() {
            context.history().reset('doneUpdateLine');
            context.enter(modeBrowse(context));

            if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
              return chapter.restart();
            }

            var msec = transitionTime(deleteLinesLoc, context.map().center());

            if (msec) {
              reveal(null, null, {
                duration: 0
              });
            }

            context.map().centerZoomEase(deleteLinesLoc, 18, msec);
            timeout(function () {
              var padding = 200 * Math.pow(2, context.map().zoom() - 18);
              var box = pad(deleteLinesLoc, padding, context);
              box.top -= 200;
              box.height += 400;

              var advance = function advance() {
                continueTo(rightClickIntersection);
              };

              reveal(box, helpHtml('intro.lines.delete_lines', {
                street: _t('intro.graph.name.12th-avenue')
              }), {
                buttonText: _t.html('intro.ok'),
                buttonCallback: advance
              });
              context.map().on('move.intro drawn.intro', function () {
                var padding = 200 * Math.pow(2, context.map().zoom() - 18);
                var box = pad(deleteLinesLoc, padding, context);
                box.top -= 200;
                box.height += 400;
                reveal(box, helpHtml('intro.lines.delete_lines', {
                  street: _t('intro.graph.name.12th-avenue')
                }), {
                  duration: 0,
                  buttonText: _t.html('intro.ok'),
                  buttonCallback: advance
                });
              });
              context.history().on('change.intro', function () {
                timeout(function () {
                  continueTo(deleteLines);
                }, 500); // after any transition (e.g. if user deleted intersection)
              });
            }, msec + 100);

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function rightClickIntersection() {
            context.history().reset('doneUpdateLine');
            context.enter(modeBrowse(context));
            context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
            var rightClickString = helpHtml('intro.lines.split_street', {
              street1: _t('intro.graph.name.11th-avenue'),
              street2: _t('intro.graph.name.washington-street')
            }) + helpHtml('intro.lines.' + (context.lastPointerType() === 'mouse' ? 'rightclick_intersection' : 'edit_menu_intersection_touch'));
            timeout(function () {
              var padding = 60 * Math.pow(2, context.map().zoom() - 18);
              var box = pad(eleventhAvenueEnd, padding, context);
              reveal(box, rightClickString);
              context.map().on('move.intro drawn.intro', function () {
                var padding = 60 * Math.pow(2, context.map().zoom() - 18);
                var box = pad(eleventhAvenueEnd, padding, context);
                reveal(box, rightClickString, {
                  duration: 0
                });
              });
              context.on('enter.intro', function (mode) {
                if (mode.id !== 'select') return;
                var ids = context.selectedIDs();
                if (ids.length !== 1 || ids[0] !== eleventhAvenueEndID) return;
                timeout(function () {
                  var node = selectMenuItem(context, 'split').node();
                  if (!node) return;
                  continueTo(splitIntersection);
                }, 50); // after menu visible
              });
              context.history().on('change.intro', function () {
                timeout(function () {
                  continueTo(deleteLines);
                }, 300); // after any transition (e.g. if user deleted intersection)
              });
            }, 600);

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function splitIntersection() {
            if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
              return continueTo(deleteLines);
            }

            var node = selectMenuItem(context, 'split').node();

            if (!node) {
              return continueTo(rightClickIntersection);
            }

            var wasChanged = false;
            _washingtonSegmentID = null;
            reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
              street: _t('intro.graph.name.washington-street')
            }), {
              padding: 50
            });
            context.map().on('move.intro drawn.intro', function () {
              var node = selectMenuItem(context, 'split').node();

              if (!wasChanged && !node) {
                return continueTo(rightClickIntersection);
              }

              reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
                street: _t('intro.graph.name.washington-street')
              }), {
                duration: 0,
                padding: 50
              });
            });
            context.history().on('change.intro', function (changed) {
              wasChanged = true;
              timeout(function () {
                if (context.history().undoAnnotation() === _t('operations.split.annotation.line', {
                  n: 1
                })) {
                  _washingtonSegmentID = changed.created()[0].id;
                  continueTo(didSplit);
                } else {
                  _washingtonSegmentID = null;
                  continueTo(retrySplit);
                }
              }, 300); // after any transition (e.g. if user deleted intersection)
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function retrySplit() {
            context.enter(modeBrowse(context));
            context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);

            var advance = function advance() {
              continueTo(rightClickIntersection);
            };

            var padding = 60 * Math.pow(2, context.map().zoom() - 18);
            var box = pad(eleventhAvenueEnd, padding, context);
            reveal(box, helpHtml('intro.lines.retry_split'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: advance
            });
            context.map().on('move.intro drawn.intro', function () {
              var padding = 60 * Math.pow(2, context.map().zoom() - 18);
              var box = pad(eleventhAvenueEnd, padding, context);
              reveal(box, helpHtml('intro.lines.retry_split'), {
                duration: 0,
                buttonText: _t.html('intro.ok'),
                buttonCallback: advance
              });
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              nextStep();
            }
          }

          function didSplit() {
            if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
              return continueTo(rightClickIntersection);
            }

            var ids = context.selectedIDs();
            var string = 'intro.lines.did_split_' + (ids.length > 1 ? 'multi' : 'single');
            var street = _t('intro.graph.name.washington-street');
            var padding = 200 * Math.pow(2, context.map().zoom() - 18);
            var box = pad(twelfthAvenue, padding, context);
            box.width = box.width / 2;
            reveal(box, helpHtml(string, {
              street1: street,
              street2: street
            }), {
              duration: 500
            });
            timeout(function () {
              context.map().centerZoomEase(twelfthAvenue, 18, 500);
              context.map().on('move.intro drawn.intro', function () {
                var padding = 200 * Math.pow(2, context.map().zoom() - 18);
                var box = pad(twelfthAvenue, padding, context);
                box.width = box.width / 2;
                reveal(box, helpHtml(string, {
                  street1: street,
                  street2: street
                }), {
                  duration: 0
                });
              });
            }, 600); // after initial reveal and curtain cut

            context.on('enter.intro', function () {
              var ids = context.selectedIDs();

              if (ids.length === 1 && ids[0] === _washingtonSegmentID) {
                continueTo(multiSelect);
              }
            });
            context.history().on('change.intro', function () {
              if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
                return continueTo(rightClickIntersection);
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function multiSelect() {
            if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
              return continueTo(rightClickIntersection);
            }

            var ids = context.selectedIDs();
            var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
            var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;

            if (hasWashington && hasTwelfth) {
              return continueTo(multiRightClick);
            } else if (!hasWashington && !hasTwelfth) {
              return continueTo(didSplit);
            }

            context.map().centerZoomEase(twelfthAvenue, 18, 500);
            timeout(function () {
              var selected, other, padding, box;

              if (hasWashington) {
                selected = _t('intro.graph.name.washington-street');
                other = _t('intro.graph.name.12th-avenue');
                padding = 60 * Math.pow(2, context.map().zoom() - 18);
                box = pad(twelfthAvenueEnd, padding, context);
                box.width *= 3;
              } else {
                selected = _t('intro.graph.name.12th-avenue');
                other = _t('intro.graph.name.washington-street');
                padding = 200 * Math.pow(2, context.map().zoom() - 18);
                box = pad(twelfthAvenue, padding, context);
                box.width /= 2;
              }

              reveal(box, helpHtml('intro.lines.multi_select', {
                selected: selected,
                other1: other
              }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
                selected: selected,
                other2: other
              }));
              context.map().on('move.intro drawn.intro', function () {
                if (hasWashington) {
                  selected = _t('intro.graph.name.washington-street');
                  other = _t('intro.graph.name.12th-avenue');
                  padding = 60 * Math.pow(2, context.map().zoom() - 18);
                  box = pad(twelfthAvenueEnd, padding, context);
                  box.width *= 3;
                } else {
                  selected = _t('intro.graph.name.12th-avenue');
                  other = _t('intro.graph.name.washington-street');
                  padding = 200 * Math.pow(2, context.map().zoom() - 18);
                  box = pad(twelfthAvenue, padding, context);
                  box.width /= 2;
                }

                reveal(box, helpHtml('intro.lines.multi_select', {
                  selected: selected,
                  other1: other
                }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
                  selected: selected,
                  other2: other
                }), {
                  duration: 0
                });
              });
              context.on('enter.intro', function () {
                continueTo(multiSelect);
              });
              context.history().on('change.intro', function () {
                if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
                  return continueTo(rightClickIntersection);
                }
              });
            }, 600);

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function multiRightClick() {
            if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
              return continueTo(rightClickIntersection);
            }

            var padding = 200 * Math.pow(2, context.map().zoom() - 18);
            var box = pad(twelfthAvenue, padding, context);
            var rightClickString = helpHtml('intro.lines.multi_select_success') + helpHtml('intro.lines.multi_' + (context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch'));
            reveal(box, rightClickString);
            context.map().on('move.intro drawn.intro', function () {
              var padding = 200 * Math.pow(2, context.map().zoom() - 18);
              var box = pad(twelfthAvenue, padding, context);
              reveal(box, rightClickString, {
                duration: 0
              });
            });
            context.ui().editMenu().on('toggled.intro', function (open) {
              if (!open) return;
              timeout(function () {
                var ids = context.selectedIDs();

                if (ids.length === 2 && ids.indexOf(twelfthAvenueID) !== -1 && ids.indexOf(_washingtonSegmentID) !== -1) {
                  var node = selectMenuItem(context, 'delete').node();
                  if (!node) return;
                  continueTo(multiDelete);
                } else if (ids.length === 1 && ids.indexOf(_washingtonSegmentID) !== -1) {
                  return continueTo(multiSelect);
                } else {
                  return continueTo(didSplit);
                }
              }, 300); // after edit menu visible
            });
            context.history().on('change.intro', function () {
              if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
                return continueTo(rightClickIntersection);
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.ui().editMenu().on('toggled.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function multiDelete() {
            if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
              return continueTo(rightClickIntersection);
            }

            var node = selectMenuItem(context, 'delete').node();
            if (!node) return continueTo(multiRightClick);
            reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
              padding: 50
            });
            context.map().on('move.intro drawn.intro', function () {
              reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
                duration: 0,
                padding: 50
              });
            });
            context.on('exit.intro', function () {
              if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
                return continueTo(multiSelect); // left select mode but roads still exist
              }
            });
            context.history().on('change.intro', function () {
              if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
                continueTo(retryDelete); // changed something but roads still exist
              } else {
                continueTo(play);
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('exit.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function retryDelete() {
            context.enter(modeBrowse(context));
            var padding = 200 * Math.pow(2, context.map().zoom() - 18);
            var box = pad(twelfthAvenue, padding, context);
            reveal(box, helpHtml('intro.lines.retry_delete'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: function buttonCallback() {
                continueTo(multiSelect);
              }
            });

            function continueTo(nextStep) {
              nextStep();
            }
          }

          function play() {
            dispatch.call('done');
            reveal('.ideditor', helpHtml('intro.lines.play', {
              next: _t('intro.buildings.title')
            }), {
              tooltipBox: '.intro-nav-wrap .chapter-building',
              buttonText: _t.html('intro.ok'),
              buttonCallback: function buttonCallback() {
                reveal('.ideditor');
              }
            });
          }

          chapter.enter = function () {
            addLine();
          };

          chapter.exit = function () {
            timeouts.forEach(window.clearTimeout);
            select(window).on('pointerdown.intro mousedown.intro', null, true);
            context.on('enter.intro exit.intro', null);
            context.map().on('move.intro drawn.intro', null);
            context.history().on('change.intro', null);
            context.container().select('.inspector-wrap').on('wheel.intro', null);
            context.container().select('.preset-list-button').on('click.intro', null);
          };

          chapter.restart = function () {
            chapter.exit();
            chapter.enter();
          };

          return utilRebind(chapter, dispatch, 'on');
        }

        function uiIntroBuilding(context, reveal) {
          var dispatch = dispatch$8('done');
          var house = [-85.62815, 41.95638];
          var tank = [-85.62732, 41.95347];
          var buildingCatetory = _mainPresetIndex.item('category-building');
          var housePreset = _mainPresetIndex.item('building/house');
          var tankPreset = _mainPresetIndex.item('man_made/storage_tank');
          var timeouts = [];
          var _houseID = null;
          var _tankID = null;
          var chapter = {
            title: 'intro.buildings.title'
          };

          function timeout(f, t) {
            timeouts.push(window.setTimeout(f, t));
          }

          function eventCancel(d3_event) {
            d3_event.stopPropagation();
            d3_event.preventDefault();
          }

          function revealHouse(center, text, options) {
            var padding = 160 * Math.pow(2, context.map().zoom() - 20);
            var box = pad(center, padding, context);
            reveal(box, text, options);
          }

          function revealTank(center, text, options) {
            var padding = 190 * Math.pow(2, context.map().zoom() - 19.5);
            var box = pad(center, padding, context);
            reveal(box, text, options);
          }

          function addHouse() {
            context.enter(modeBrowse(context));
            context.history().reset('initial');
            _houseID = null;
            var msec = transitionTime(house, context.map().center());

            if (msec) {
              reveal(null, null, {
                duration: 0
              });
            }

            context.map().centerZoomEase(house, 19, msec);
            timeout(function () {
              var tooltip = reveal('button.add-area', helpHtml('intro.buildings.add_building'));
              tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-buildings');
              context.on('enter.intro', function (mode) {
                if (mode.id !== 'add-area') return;
                continueTo(startHouse);
              });
            }, msec + 100);

            function continueTo(nextStep) {
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function startHouse() {
            if (context.mode().id !== 'add-area') {
              return continueTo(addHouse);
            }

            _houseID = null;
            context.map().zoomEase(20, 500);
            timeout(function () {
              var startString = helpHtml('intro.buildings.start_building') + helpHtml('intro.buildings.building_corner_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
              revealHouse(house, startString);
              context.map().on('move.intro drawn.intro', function () {
                revealHouse(house, startString, {
                  duration: 0
                });
              });
              context.on('enter.intro', function (mode) {
                if (mode.id !== 'draw-area') return chapter.restart();
                continueTo(continueHouse);
              });
            }, 550); // after easing

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function continueHouse() {
            if (context.mode().id !== 'draw-area') {
              return continueTo(addHouse);
            }

            _houseID = null;
            var continueString = helpHtml('intro.buildings.continue_building') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_building');
            revealHouse(house, continueString);
            context.map().on('move.intro drawn.intro', function () {
              revealHouse(house, continueString, {
                duration: 0
              });
            });
            context.on('enter.intro', function (mode) {
              if (mode.id === 'draw-area') {
                return;
              } else if (mode.id === 'select') {
                var graph = context.graph();
                var way = context.entity(context.selectedIDs()[0]);
                var nodes = graph.childNodes(way);
                var points = utilArrayUniq(nodes).map(function (n) {
                  return context.projection(n.loc);
                });

                if (isMostlySquare(points)) {
                  _houseID = way.id;
                  return continueTo(chooseCategoryBuilding);
                } else {
                  return continueTo(retryHouse);
                }
              } else {
                return chapter.restart();
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function retryHouse() {
            var onClick = function onClick() {
              continueTo(addHouse);
            };

            revealHouse(house, helpHtml('intro.buildings.retry_building'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: onClick
            });
            context.map().on('move.intro drawn.intro', function () {
              revealHouse(house, helpHtml('intro.buildings.retry_building'), {
                duration: 0,
                buttonText: _t.html('intro.ok'),
                buttonCallback: onClick
              });
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              nextStep();
            }
          }

          function chooseCategoryBuilding() {
            if (!_houseID || !context.hasEntity(_houseID)) {
              return addHouse();
            }

            var ids = context.selectedIDs();

            if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
              context.enter(modeSelect(context, [_houseID]));
            } // disallow scrolling


            context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
            timeout(function () {
              // reset pane, in case user somehow happened to change it..
              context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
              var button = context.container().select('.preset-category-building .preset-list-button');
              reveal(button.node(), helpHtml('intro.buildings.choose_category_building', {
                category: buildingCatetory.name()
              }));
              button.on('click.intro', function () {
                button.on('click.intro', null);
                continueTo(choosePresetHouse);
              });
            }, 400); // after preset list pane visible..

            context.on('enter.intro', function (mode) {
              if (!_houseID || !context.hasEntity(_houseID)) {
                return continueTo(addHouse);
              }

              var ids = context.selectedIDs();

              if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
                return continueTo(chooseCategoryBuilding);
              }
            });

            function continueTo(nextStep) {
              context.container().select('.inspector-wrap').on('wheel.intro', null);
              context.container().select('.preset-list-button').on('click.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function choosePresetHouse() {
            if (!_houseID || !context.hasEntity(_houseID)) {
              return addHouse();
            }

            var ids = context.selectedIDs();

            if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
              context.enter(modeSelect(context, [_houseID]));
            } // disallow scrolling


            context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
            timeout(function () {
              // reset pane, in case user somehow happened to change it..
              context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
              var button = context.container().select('.preset-building-house .preset-list-button');
              reveal(button.node(), helpHtml('intro.buildings.choose_preset_house', {
                preset: housePreset.name()
              }), {
                duration: 300
              });
              button.on('click.intro', function () {
                button.on('click.intro', null);
                continueTo(closeEditorHouse);
              });
            }, 400); // after preset list pane visible..

            context.on('enter.intro', function (mode) {
              if (!_houseID || !context.hasEntity(_houseID)) {
                return continueTo(addHouse);
              }

              var ids = context.selectedIDs();

              if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
                return continueTo(chooseCategoryBuilding);
              }
            });

            function continueTo(nextStep) {
              context.container().select('.inspector-wrap').on('wheel.intro', null);
              context.container().select('.preset-list-button').on('click.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function closeEditorHouse() {
            if (!_houseID || !context.hasEntity(_houseID)) {
              return addHouse();
            }

            var ids = context.selectedIDs();

            if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
              context.enter(modeSelect(context, [_houseID]));
            }

            context.history().checkpoint('hasHouse');
            context.on('exit.intro', function () {
              continueTo(rightClickHouse);
            });
            timeout(function () {
              reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
                button: icon('#iD-icon-close', 'inline')
              }));
            }, 500);

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              nextStep();
            }
          }

          function rightClickHouse() {
            if (!_houseID) return chapter.restart();
            context.enter(modeBrowse(context));
            context.history().reset('hasHouse');
            var zoom = context.map().zoom();

            if (zoom < 20) {
              zoom = 20;
            }

            context.map().centerZoomEase(house, zoom, 500);
            context.on('enter.intro', function (mode) {
              if (mode.id !== 'select') return;
              var ids = context.selectedIDs();
              if (ids.length !== 1 || ids[0] !== _houseID) return;
              timeout(function () {
                var node = selectMenuItem(context, 'orthogonalize').node();
                if (!node) return;
                continueTo(clickSquare);
              }, 50); // after menu visible
            });
            context.map().on('move.intro drawn.intro', function () {
              var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_building' : 'edit_menu_building_touch'));
              revealHouse(house, rightclickString, {
                duration: 0
              });
            });
            context.history().on('change.intro', function () {
              continueTo(rightClickHouse);
            });

            function continueTo(nextStep) {
              context.on('enter.intro', null);
              context.map().on('move.intro drawn.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function clickSquare() {
            if (!_houseID) return chapter.restart();
            var entity = context.hasEntity(_houseID);
            if (!entity) return continueTo(rightClickHouse);
            var node = selectMenuItem(context, 'orthogonalize').node();

            if (!node) {
              return continueTo(rightClickHouse);
            }

            var wasChanged = false;
            reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
              padding: 50
            });
            context.on('enter.intro', function (mode) {
              if (mode.id === 'browse') {
                continueTo(rightClickHouse);
              } else if (mode.id === 'move' || mode.id === 'rotate') {
                continueTo(retryClickSquare);
              }
            });
            context.map().on('move.intro', function () {
              var node = selectMenuItem(context, 'orthogonalize').node();

              if (!wasChanged && !node) {
                return continueTo(rightClickHouse);
              }

              reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
                duration: 0,
                padding: 50
              });
            });
            context.history().on('change.intro', function () {
              wasChanged = true;
              context.history().on('change.intro', null); // Something changed.  Wait for transition to complete and check undo annotation.

              timeout(function () {
                if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature', {
                  n: 1
                })) {
                  continueTo(doneSquare);
                } else {
                  continueTo(retryClickSquare);
                }
              }, 500); // after transitioned actions
            });

            function continueTo(nextStep) {
              context.on('enter.intro', null);
              context.map().on('move.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function retryClickSquare() {
            context.enter(modeBrowse(context));
            revealHouse(house, helpHtml('intro.buildings.retry_square'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: function buttonCallback() {
                continueTo(rightClickHouse);
              }
            });

            function continueTo(nextStep) {
              nextStep();
            }
          }

          function doneSquare() {
            context.history().checkpoint('doneSquare');
            revealHouse(house, helpHtml('intro.buildings.done_square'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: function buttonCallback() {
                continueTo(addTank);
              }
            });

            function continueTo(nextStep) {
              nextStep();
            }
          }

          function addTank() {
            context.enter(modeBrowse(context));
            context.history().reset('doneSquare');
            _tankID = null;
            var msec = transitionTime(tank, context.map().center());

            if (msec) {
              reveal(null, null, {
                duration: 0
              });
            }

            context.map().centerZoomEase(tank, 19.5, msec);
            timeout(function () {
              reveal('button.add-area', helpHtml('intro.buildings.add_tank'));
              context.on('enter.intro', function (mode) {
                if (mode.id !== 'add-area') return;
                continueTo(startTank);
              });
            }, msec + 100);

            function continueTo(nextStep) {
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function startTank() {
            if (context.mode().id !== 'add-area') {
              return continueTo(addTank);
            }

            _tankID = null;
            timeout(function () {
              var startString = helpHtml('intro.buildings.start_tank') + helpHtml('intro.buildings.tank_edge_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
              revealTank(tank, startString);
              context.map().on('move.intro drawn.intro', function () {
                revealTank(tank, startString, {
                  duration: 0
                });
              });
              context.on('enter.intro', function (mode) {
                if (mode.id !== 'draw-area') return chapter.restart();
                continueTo(continueTank);
              });
            }, 550); // after easing

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function continueTank() {
            if (context.mode().id !== 'draw-area') {
              return continueTo(addTank);
            }

            _tankID = null;
            var continueString = helpHtml('intro.buildings.continue_tank') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_tank');
            revealTank(tank, continueString);
            context.map().on('move.intro drawn.intro', function () {
              revealTank(tank, continueString, {
                duration: 0
              });
            });
            context.on('enter.intro', function (mode) {
              if (mode.id === 'draw-area') {
                return;
              } else if (mode.id === 'select') {
                _tankID = context.selectedIDs()[0];
                return continueTo(searchPresetTank);
              } else {
                return continueTo(addTank);
              }
            });

            function continueTo(nextStep) {
              context.map().on('move.intro drawn.intro', null);
              context.on('enter.intro', null);
              nextStep();
            }
          }

          function searchPresetTank() {
            if (!_tankID || !context.hasEntity(_tankID)) {
              return addTank();
            }

            var ids = context.selectedIDs();

            if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
              context.enter(modeSelect(context, [_tankID]));
            } // disallow scrolling


            context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
            timeout(function () {
              // reset pane, in case user somehow happened to change it..
              context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
              context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
              reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
                preset: tankPreset.name()
              }));
            }, 400); // after preset list pane visible..

            context.on('enter.intro', function (mode) {
              if (!_tankID || !context.hasEntity(_tankID)) {
                return continueTo(addTank);
              }

              var ids = context.selectedIDs();

              if (mode.id !== 'select' || !ids.length || ids[0] !== _tankID) {
                // keep the user's area selected..
                context.enter(modeSelect(context, [_tankID])); // reset pane, in case user somehow happened to change it..

                context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling

                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
                context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
                reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
                  preset: tankPreset.name()
                }));
                context.history().on('change.intro', null);
              }
            });

            function checkPresetSearch() {
              var first = context.container().select('.preset-list-item:first-child');

              if (first.classed('preset-man_made-storage_tank')) {
                reveal(first.select('.preset-list-button').node(), helpHtml('intro.buildings.choose_tank', {
                  preset: tankPreset.name()
                }), {
                  duration: 300
                });
                context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
                context.history().on('change.intro', function () {
                  continueTo(closeEditorTank);
                });
              }
            }

            function continueTo(nextStep) {
              context.container().select('.inspector-wrap').on('wheel.intro', null);
              context.on('enter.intro', null);
              context.history().on('change.intro', null);
              context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
              nextStep();
            }
          }

          function closeEditorTank() {
            if (!_tankID || !context.hasEntity(_tankID)) {
              return addTank();
            }

            var ids = context.selectedIDs();

            if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
              context.enter(modeSelect(context, [_tankID]));
            }

            context.history().checkpoint('hasTank');
            context.on('exit.intro', function () {
              continueTo(rightClickTank);
            });
            timeout(function () {
              reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
                button: icon('#iD-icon-close', 'inline')
              }));
            }, 500);

            function continueTo(nextStep) {
              context.on('exit.intro', null);
              nextStep();
            }
          }

          function rightClickTank() {
            if (!_tankID) return continueTo(addTank);
            context.enter(modeBrowse(context));
            context.history().reset('hasTank');
            context.map().centerEase(tank, 500);
            timeout(function () {
              context.on('enter.intro', function (mode) {
                if (mode.id !== 'select') return;
                var ids = context.selectedIDs();
                if (ids.length !== 1 || ids[0] !== _tankID) return;
                timeout(function () {
                  var node = selectMenuItem(context, 'circularize').node();
                  if (!node) return;
                  continueTo(clickCircle);
                }, 50); // after menu visible
              });
              var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_tank' : 'edit_menu_tank_touch'));
              revealTank(tank, rightclickString);
              context.map().on('move.intro drawn.intro', function () {
                revealTank(tank, rightclickString, {
                  duration: 0
                });
              });
              context.history().on('change.intro', function () {
                continueTo(rightClickTank);
              });
            }, 600);

            function continueTo(nextStep) {
              context.on('enter.intro', null);
              context.map().on('move.intro drawn.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function clickCircle() {
            if (!_tankID) return chapter.restart();
            var entity = context.hasEntity(_tankID);
            if (!entity) return continueTo(rightClickTank);
            var node = selectMenuItem(context, 'circularize').node();

            if (!node) {
              return continueTo(rightClickTank);
            }

            var wasChanged = false;
            reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
              padding: 50
            });
            context.on('enter.intro', function (mode) {
              if (mode.id === 'browse') {
                continueTo(rightClickTank);
              } else if (mode.id === 'move' || mode.id === 'rotate') {
                continueTo(retryClickCircle);
              }
            });
            context.map().on('move.intro', function () {
              var node = selectMenuItem(context, 'circularize').node();

              if (!wasChanged && !node) {
                return continueTo(rightClickTank);
              }

              reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
                duration: 0,
                padding: 50
              });
            });
            context.history().on('change.intro', function () {
              wasChanged = true;
              context.history().on('change.intro', null); // Something changed.  Wait for transition to complete and check undo annotation.

              timeout(function () {
                if (context.history().undoAnnotation() === _t('operations.circularize.annotation.feature', {
                  n: 1
                })) {
                  continueTo(play);
                } else {
                  continueTo(retryClickCircle);
                }
              }, 500); // after transitioned actions
            });

            function continueTo(nextStep) {
              context.on('enter.intro', null);
              context.map().on('move.intro', null);
              context.history().on('change.intro', null);
              nextStep();
            }
          }

          function retryClickCircle() {
            context.enter(modeBrowse(context));
            revealTank(tank, helpHtml('intro.buildings.retry_circle'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: function buttonCallback() {
                continueTo(rightClickTank);
              }
            });

            function continueTo(nextStep) {
              nextStep();
            }
          }

          function play() {
            dispatch.call('done');
            reveal('.ideditor', helpHtml('intro.buildings.play', {
              next: _t('intro.startediting.title')
            }), {
              tooltipBox: '.intro-nav-wrap .chapter-startEditing',
              buttonText: _t.html('intro.ok'),
              buttonCallback: function buttonCallback() {
                reveal('.ideditor');
              }
            });
          }

          chapter.enter = function () {
            addHouse();
          };

          chapter.exit = function () {
            timeouts.forEach(window.clearTimeout);
            context.on('enter.intro exit.intro', null);
            context.map().on('move.intro drawn.intro', null);
            context.history().on('change.intro', null);
            context.container().select('.inspector-wrap').on('wheel.intro', null);
            context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
            context.container().select('.more-fields .combobox-input').on('click.intro', null);
          };

          chapter.restart = function () {
            chapter.exit();
            chapter.enter();
          };

          return utilRebind(chapter, dispatch, 'on');
        }

        function uiIntroStartEditing(context, reveal) {
          var dispatch = dispatch$8('done', 'startEditing');
          var modalSelection = select(null);
          var chapter = {
            title: 'intro.startediting.title'
          };

          function showHelp() {
            reveal('.map-control.help-control', helpHtml('intro.startediting.help'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: function buttonCallback() {
                shortcuts();
              }
            });
          }

          function shortcuts() {
            reveal('.map-control.help-control', helpHtml('intro.startediting.shortcuts'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: function buttonCallback() {
                showSave();
              }
            });
          }

          function showSave() {
            context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts

            reveal('.top-toolbar button.save', helpHtml('intro.startediting.save'), {
              buttonText: _t.html('intro.ok'),
              buttonCallback: function buttonCallback() {
                showStart();
              }
            });
          }

          function showStart() {
            context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts

            modalSelection = uiModal(context.container());
            modalSelection.select('.modal').attr('class', 'modal-splash modal');
            modalSelection.selectAll('.close').remove();
            var startbutton = modalSelection.select('.content').attr('class', 'fillL').append('button').attr('class', 'modal-section huge-modal-button').on('click', function () {
              modalSelection.remove();
            });
            startbutton.append('svg').attr('class', 'illustration').append('use').attr('xlink:href', '#iD-logo-walkthrough');
            startbutton.append('h2').html(_t.html('intro.startediting.start'));
            dispatch.call('startEditing');
          }

          chapter.enter = function () {
            showHelp();
          };

          chapter.exit = function () {
            modalSelection.remove();
            context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
          };

          return utilRebind(chapter, dispatch, 'on');
        }

        var chapterUi = {
          welcome: uiIntroWelcome,
          navigation: uiIntroNavigation,
          point: uiIntroPoint,
          area: uiIntroArea,
          line: uiIntroLine,
          building: uiIntroBuilding,
          startEditing: uiIntroStartEditing
        };
        var chapterFlow = ['welcome', 'navigation', 'point', 'area', 'line', 'building', 'startEditing'];
        function uiIntro(context) {
          var INTRO_IMAGERY = 'EsriWorldImageryClarity';
          var _introGraph = {};

          var _currChapter;

          function intro(selection) {
            _mainFileFetcher.get('intro_graph').then(function (dataIntroGraph) {
              // create entities for intro graph and localize names
              for (var id in dataIntroGraph) {
                if (!_introGraph[id]) {
                  _introGraph[id] = osmEntity(localize(dataIntroGraph[id]));
                }
              }

              selection.call(startIntro);
            })["catch"](function () {
              /* ignore */
            });
          }

          function startIntro(selection) {
            context.enter(modeBrowse(context)); // Save current map state

            var osm = context.connection();
            var history = context.history().toJSON();
            var hash = window.location.hash;
            var center = context.map().center();
            var zoom = context.map().zoom();
            var background = context.background().baseLayerSource();
            var overlays = context.background().overlayLayerSources();
            var opacity = context.container().selectAll('.main-map .layer-background').style('opacity');
            var caches = osm && osm.caches();
            var baseEntities = context.history().graph().base().entities; // Show sidebar and disable the sidebar resizing button
            // (this needs to be before `context.inIntro(true)`)

            context.ui().sidebar.expand();
            context.container().selectAll('button.sidebar-toggle').classed('disabled', true); // Block saving

            context.inIntro(true); // Load semi-real data used in intro

            if (osm) {
              osm.toggle(false).reset();
            }

            context.history().reset();
            context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
            context.history().checkpoint('initial'); // Setup imagery

            var imagery = context.background().findSource(INTRO_IMAGERY);

            if (imagery) {
              context.background().baseLayerSource(imagery);
            } else {
              context.background().bing();
            }

            overlays.forEach(function (d) {
              return context.background().toggleOverlayLayer(d);
            }); // Setup data layers (only OSM)

            var layers = context.layers();
            layers.all().forEach(function (item) {
              // if the layer has the function `enabled`
              if (typeof item.layer.enabled === 'function') {
                item.layer.enabled(item.id === 'osm');
              }
            });
            context.container().selectAll('.main-map .layer-background').style('opacity', 1);
            var curtain = uiCurtain(context.container().node());
            selection.call(curtain); // Store that the user started the walkthrough..

            corePreferences('walkthrough_started', 'yes'); // Restore previous walkthrough progress..

            var storedProgress = corePreferences('walkthrough_progress') || '';
            var progress = storedProgress.split(';').filter(Boolean);
            var chapters = chapterFlow.map(function (chapter, i) {
              var s = chapterUi[chapter](context, curtain.reveal).on('done', function () {
                buttons.filter(function (d) {
                  return d.title === s.title;
                }).classed('finished', true);

                if (i < chapterFlow.length - 1) {
                  var next = chapterFlow[i + 1];
                  context.container().select("button.chapter-".concat(next)).classed('next', true);
                } // Store walkthrough progress..


                progress.push(chapter);
                corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
              });
              return s;
            });
            chapters[chapters.length - 1].on('startEditing', function () {
              // Store walkthrough progress..
              progress.push('startEditing');
              corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';')); // Store if walkthrough is completed..

              var incomplete = utilArrayDifference(chapterFlow, progress);

              if (!incomplete.length) {
                corePreferences('walkthrough_completed', 'yes');
              }

              curtain.remove();
              navwrap.remove();
              context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
              context.container().selectAll('button.sidebar-toggle').classed('disabled', false);

              if (osm) {
                osm.toggle(true).reset().caches(caches);
              }

              context.history().reset().merge(Object.values(baseEntities));
              context.background().baseLayerSource(background);
              overlays.forEach(function (d) {
                return context.background().toggleOverlayLayer(d);
              });

              if (history) {
                context.history().fromJSON(history, false);
              }

              context.map().centerZoom(center, zoom);
              window.location.replace(hash);
              context.inIntro(false);
            });
            var navwrap = selection.append('div').attr('class', 'intro-nav-wrap fillD');
            navwrap.append('svg').attr('class', 'intro-nav-wrap-logo').append('use').attr('xlink:href', '#iD-logo-walkthrough');
            var buttonwrap = navwrap.append('div').attr('class', 'joined').selectAll('button.chapter');
            var buttons = buttonwrap.data(chapters).enter().append('button').attr('class', function (d, i) {
              return "chapter chapter-".concat(chapterFlow[i]);
            }).on('click', enterChapter);
            buttons.append('span').html(function (d) {
              return _t.html(d.title);
            });
            buttons.append('span').attr('class', 'status').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
            enterChapter(null, chapters[0]);

            function enterChapter(d3_event, newChapter) {
              if (_currChapter) {
                _currChapter.exit();
              }

              context.enter(modeBrowse(context));
              _currChapter = newChapter;

              _currChapter.enter();

              buttons.classed('next', false).classed('active', function (d) {
                return d.title === _currChapter.title;
              });
            }
          }

          return intro;
        }

        function uiIssuesInfo(context) {
          var warningsItem = {
            id: 'warnings',
            count: 0,
            iconID: 'iD-icon-alert',
            descriptionID: 'issues.warnings_and_errors'
          };
          var resolvedItem = {
            id: 'resolved',
            count: 0,
            iconID: 'iD-icon-apply',
            descriptionID: 'issues.user_resolved_issues'
          };

          function update(selection) {
            var shownItems = [];
            var liveIssues = context.validator().getIssues({
              what: corePreferences('validate-what') || 'edited',
              where: corePreferences('validate-where') || 'all'
            });

            if (liveIssues.length) {
              warningsItem.count = liveIssues.length;
              shownItems.push(warningsItem);
            }

            if (corePreferences('validate-what') === 'all') {
              var resolvedIssues = context.validator().getResolvedIssues();

              if (resolvedIssues.length) {
                resolvedItem.count = resolvedIssues.length;
                shownItems.push(resolvedItem);
              }
            }

            var chips = selection.selectAll('.chip').data(shownItems, function (d) {
              return d.id;
            });
            chips.exit().remove();
            var enter = chips.enter().append('a').attr('class', function (d) {
              return 'chip ' + d.id + '-count';
            }).attr('href', '#').each(function (d) {
              var chipSelection = select(this);
              var tooltipBehavior = uiTooltip().placement('top').title(_t.html(d.descriptionID));
              chipSelection.call(tooltipBehavior).on('click', function (d3_event) {
                d3_event.preventDefault();
                tooltipBehavior.hide(select(this)); // open the Issues pane

                context.ui().togglePanes(context.container().select('.map-panes .issues-pane'));
              });
              chipSelection.call(svgIcon('#' + d.iconID));
            });
            enter.append('span').attr('class', 'count');
            enter.merge(chips).selectAll('span.count').html(function (d) {
              return d.count.toString();
            });
          }

          return function (selection) {
            update(selection);
            context.validator().on('validated.infobox', function () {
              update(selection);
            });
          };
        }

        function uiMapInMap(context) {
          function mapInMap(selection) {
            var backgroundLayer = rendererTileLayer(context);
            var overlayLayers = {};
            var projection = geoRawMercator();
            var dataLayer = svgData(projection, context).showLabels(false);
            var debugLayer = svgDebug(projection, context);
            var zoom = d3_zoom().scaleExtent([geoZoomToScale(0.5), geoZoomToScale(24)]).on('start', zoomStarted).on('zoom', zoomed).on('end', zoomEnded);
            var wrap = select(null);
            var tiles = select(null);
            var viewport = select(null);
            var _isTransformed = false;
            var _isHidden = true;
            var _skipEvents = false;
            var _gesture = null;
            var _zDiff = 6; // by default, minimap renders at (main zoom - 6)

            var _dMini; // dimensions of minimap


            var _cMini; // center pixel of minimap


            var _tStart; // transform at start of gesture


            var _tCurr; // transform at most recent event


            var _timeoutID;

            function zoomStarted() {
              if (_skipEvents) return;
              _tStart = _tCurr = projection.transform();
              _gesture = null;
            }

            function zoomed(d3_event) {
              if (_skipEvents) return;
              var x = d3_event.transform.x;
              var y = d3_event.transform.y;
              var k = d3_event.transform.k;
              var isZooming = k !== _tStart.k;
              var isPanning = x !== _tStart.x || y !== _tStart.y;

              if (!isZooming && !isPanning) {
                return; // no change
              } // lock in either zooming or panning, don't allow both in minimap.


              if (!_gesture) {
                _gesture = isZooming ? 'zoom' : 'pan';
              }

              var tMini = projection.transform();
              var tX, tY, scale;

              if (_gesture === 'zoom') {
                scale = k / tMini.k;
                tX = (_cMini[0] / scale - _cMini[0]) * scale;
                tY = (_cMini[1] / scale - _cMini[1]) * scale;
              } else {
                k = tMini.k;
                scale = 1;
                tX = x - tMini.x;
                tY = y - tMini.y;
              }

              utilSetTransform(tiles, tX, tY, scale);
              utilSetTransform(viewport, 0, 0, scale);
              _isTransformed = true;
              _tCurr = identity$2.translate(x, y).scale(k);
              var zMain = geoScaleToZoom(context.projection.scale());
              var zMini = geoScaleToZoom(k);
              _zDiff = zMain - zMini;
              queueRedraw();
            }

            function zoomEnded() {
              if (_skipEvents) return;
              if (_gesture !== 'pan') return;
              updateProjection();
              _gesture = null;
              context.map().center(projection.invert(_cMini)); // recenter main map..
            }

            function updateProjection() {
              var loc = context.map().center();
              var tMain = context.projection.transform();
              var zMain = geoScaleToZoom(tMain.k);
              var zMini = Math.max(zMain - _zDiff, 0.5);
              var kMini = geoZoomToScale(zMini);
              projection.translate([tMain.x, tMain.y]).scale(kMini);
              var point = projection(loc);
              var mouse = _gesture === 'pan' ? geoVecSubtract([_tCurr.x, _tCurr.y], [_tStart.x, _tStart.y]) : [0, 0];
              var xMini = _cMini[0] - point[0] + tMain.x + mouse[0];
              var yMini = _cMini[1] - point[1] + tMain.y + mouse[1];
              projection.translate([xMini, yMini]).clipExtent([[0, 0], _dMini]);
              _tCurr = projection.transform();

              if (_isTransformed) {
                utilSetTransform(tiles, 0, 0);
                utilSetTransform(viewport, 0, 0);
                _isTransformed = false;
              }

              zoom.scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
              _skipEvents = true;
              wrap.call(zoom.transform, _tCurr);
              _skipEvents = false;
            }

            function redraw() {
              clearTimeout(_timeoutID);
              if (_isHidden) return;
              updateProjection();
              var zMini = geoScaleToZoom(projection.scale()); // setup tile container

              tiles = wrap.selectAll('.map-in-map-tiles').data([0]);
              tiles = tiles.enter().append('div').attr('class', 'map-in-map-tiles').merge(tiles); // redraw background

              backgroundLayer.source(context.background().baseLayerSource()).projection(projection).dimensions(_dMini);
              var background = tiles.selectAll('.map-in-map-background').data([0]);
              background.enter().append('div').attr('class', 'map-in-map-background').merge(background).call(backgroundLayer); // redraw overlay

              var overlaySources = context.background().overlayLayerSources();
              var activeOverlayLayers = [];

              for (var i = 0; i < overlaySources.length; i++) {
                if (overlaySources[i].validZoom(zMini)) {
                  if (!overlayLayers[i]) overlayLayers[i] = rendererTileLayer(context);
                  activeOverlayLayers.push(overlayLayers[i].source(overlaySources[i]).projection(projection).dimensions(_dMini));
                }
              }

              var overlay = tiles.selectAll('.map-in-map-overlay').data([0]);
              overlay = overlay.enter().append('div').attr('class', 'map-in-map-overlay').merge(overlay);
              var overlays = overlay.selectAll('div').data(activeOverlayLayers, function (d) {
                return d.source().name();
              });
              overlays.exit().remove();
              overlays = overlays.enter().append('div').merge(overlays).each(function (layer) {
                select(this).call(layer);
              });
              var dataLayers = tiles.selectAll('.map-in-map-data').data([0]);
              dataLayers.exit().remove();
              dataLayers = dataLayers.enter().append('svg').attr('class', 'map-in-map-data').merge(dataLayers).call(dataLayer).call(debugLayer); // redraw viewport bounding box

              if (_gesture !== 'pan') {
                var getPath = d3_geoPath(projection);
                var bbox = {
                  type: 'Polygon',
                  coordinates: [context.map().extent().polygon()]
                };
                viewport = wrap.selectAll('.map-in-map-viewport').data([0]);
                viewport = viewport.enter().append('svg').attr('class', 'map-in-map-viewport').merge(viewport);
                var path = viewport.selectAll('.map-in-map-bbox').data([bbox]);
                path.enter().append('path').attr('class', 'map-in-map-bbox').merge(path).attr('d', getPath).classed('thick', function (d) {
                  return getPath.area(d) < 30;
                });
              }
            }

            function queueRedraw() {
              clearTimeout(_timeoutID);
              _timeoutID = setTimeout(function () {
                redraw();
              }, 750);
            }

            function toggle(d3_event) {
              if (d3_event) d3_event.preventDefault();
              _isHidden = !_isHidden;
              context.container().select('.minimap-toggle-item').classed('active', !_isHidden).select('input').property('checked', !_isHidden);

              if (_isHidden) {
                wrap.style('display', 'block').style('opacity', '1').transition().duration(200).style('opacity', '0').on('end', function () {
                  selection.selectAll('.map-in-map').style('display', 'none');
                });
              } else {
                wrap.style('display', 'block').style('opacity', '0').transition().duration(200).style('opacity', '1').on('end', function () {
                  redraw();
                });
              }
            }

            uiMapInMap.toggle = toggle;
            wrap = selection.selectAll('.map-in-map').data([0]);
            wrap = wrap.enter().append('div').attr('class', 'map-in-map').style('display', _isHidden ? 'none' : 'block').call(zoom).on('dblclick.zoom', null).merge(wrap); // reflow warning: Hardcode dimensions - currently can't resize it anyway..

            _dMini = [200, 150]; //utilGetDimensions(wrap);

            _cMini = geoVecScale(_dMini, 0.5);
            context.map().on('drawn.map-in-map', function (drawn) {
              if (drawn.full === true) {
                redraw();
              }
            });
            redraw();
            context.keybinding().on(_t('background.minimap.key'), toggle);
          }

          return mapInMap;
        }

        function uiNotice(context) {
          return function (selection) {
            var div = selection.append('div').attr('class', 'notice');
            var button = div.append('button').attr('class', 'zoom-to notice fillD').on('click', function () {
              context.map().zoomEase(context.minEditableZoom());
            }).on('wheel', function (d3_event) {
              // let wheel events pass through #4482
              var e2 = new WheelEvent(d3_event.type, d3_event);
              context.surface().node().dispatchEvent(e2);
            });
            button.call(svgIcon('#iD-icon-plus', 'pre-text')).append('span').attr('class', 'label').html(_t.html('zoom_in_edit'));

            function disableTooHigh() {
              var canEdit = context.map().zoom() >= context.minEditableZoom();
              div.style('display', canEdit ? 'none' : 'block');
            }

            context.map().on('move.notice', debounce(disableTooHigh, 500));
            disableTooHigh();
          };
        }

        function uiPhotoviewer(context) {
          var dispatch = dispatch$8('resize');

          var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

          function photoviewer(selection) {
            selection.append('button').attr('class', 'thumb-hide').on('click', function () {
              if (services.streetside) {
                services.streetside.hideViewer(context);
              }

              if (services.mapillary) {
                services.mapillary.hideViewer(context);
              }

              if (services.openstreetcam) {
                services.openstreetcam.hideViewer(context);
              }
            }).append('div').call(svgIcon('#iD-icon-close'));

            function preventDefault(d3_event) {
              d3_event.preventDefault();
            }

            selection.append('button').attr('class', 'resize-handle-xy').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
              resizeOnX: true,
              resizeOnY: true
            }));
            selection.append('button').attr('class', 'resize-handle-x').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
              resizeOnX: true
            }));
            selection.append('button').attr('class', 'resize-handle-y').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
              resizeOnY: true
            }));

            function buildResizeListener(target, eventName, dispatch, options) {
              var resizeOnX = !!options.resizeOnX;
              var resizeOnY = !!options.resizeOnY;
              var minHeight = options.minHeight || 240;
              var minWidth = options.minWidth || 320;
              var pointerId;
              var startX;
              var startY;
              var startWidth;
              var startHeight;

              function startResize(d3_event) {
                if (pointerId !== (d3_event.pointerId || 'mouse')) return;
                d3_event.preventDefault();
                d3_event.stopPropagation();
                var mapSize = context.map().dimensions();

                if (resizeOnX) {
                  var maxWidth = mapSize[0];
                  var newWidth = clamp(startWidth + d3_event.clientX - startX, minWidth, maxWidth);
                  target.style('width', newWidth + 'px');
                }

                if (resizeOnY) {
                  var maxHeight = mapSize[1] - 90; // preserve space at top/bottom of map

                  var newHeight = clamp(startHeight + startY - d3_event.clientY, minHeight, maxHeight);
                  target.style('height', newHeight + 'px');
                }

                dispatch.call(eventName, target, utilGetDimensions(target, true));
              }

              function clamp(num, min, max) {
                return Math.max(min, Math.min(num, max));
              }

              function stopResize(d3_event) {
                if (pointerId !== (d3_event.pointerId || 'mouse')) return;
                d3_event.preventDefault();
                d3_event.stopPropagation(); // remove all the listeners we added

                select(window).on('.' + eventName, null);
              }

              return function initResize(d3_event) {
                d3_event.preventDefault();
                d3_event.stopPropagation();
                pointerId = d3_event.pointerId || 'mouse';
                startX = d3_event.clientX;
                startY = d3_event.clientY;
                var targetRect = target.node().getBoundingClientRect();
                startWidth = targetRect.width;
                startHeight = targetRect.height;
                select(window).on(_pointerPrefix + 'move.' + eventName, startResize, false).on(_pointerPrefix + 'up.' + eventName, stopResize, false);

                if (_pointerPrefix === 'pointer') {
                  select(window).on('pointercancel.' + eventName, stopResize, false);
                }
              };
            }
          }

          photoviewer.onMapResize = function () {
            var photoviewer = context.container().select('.photoviewer');
            var content = context.container().select('.main-content');
            var mapDimensions = utilGetDimensions(content, true); // shrink photo viewer if it is too big
            // (-90 preserves space at top and bottom of map used by menus)

            var photoDimensions = utilGetDimensions(photoviewer, true);

            if (photoDimensions[0] > mapDimensions[0] || photoDimensions[1] > mapDimensions[1] - 90) {
              var setPhotoDimensions = [Math.min(photoDimensions[0], mapDimensions[0]), Math.min(photoDimensions[1], mapDimensions[1] - 90)];
              photoviewer.style('width', setPhotoDimensions[0] + 'px').style('height', setPhotoDimensions[1] + 'px');
              dispatch.call('resize', photoviewer, setPhotoDimensions);
            }
          };

          return utilRebind(photoviewer, dispatch, 'on');
        }

        function uiRestore(context) {
          return function (selection) {
            if (!context.history().hasRestorableChanges()) return;
            var modalSelection = uiModal(selection, true);
            modalSelection.select('.modal').attr('class', 'modal fillL');
            var introModal = modalSelection.select('.content');
            introModal.append('div').attr('class', 'modal-section').append('h3').html(_t.html('restore.heading'));
            introModal.append('div').attr('class', 'modal-section').append('p').html(_t.html('restore.description'));
            var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
            var restore = buttonWrap.append('button').attr('class', 'restore').on('click', function () {
              context.history().restore();
              modalSelection.remove();
            });
            restore.append('svg').attr('class', 'logo logo-restore').append('use').attr('xlink:href', '#iD-logo-restore');
            restore.append('div').html(_t.html('restore.restore'));
            var reset = buttonWrap.append('button').attr('class', 'reset').on('click', function () {
              context.history().clearSaved();
              modalSelection.remove();
            });
            reset.append('svg').attr('class', 'logo logo-reset').append('use').attr('xlink:href', '#iD-logo-reset');
            reset.append('div').html(_t.html('restore.reset'));
            restore.node().focus();
          };
        }

        function uiScale(context) {
          var projection = context.projection,
              isImperial = !_mainLocalizer.usesMetric(),
              maxLength = 180,
              tickHeight = 8;

          function scaleDefs(loc1, loc2) {
            var lat = (loc2[1] + loc1[1]) / 2,
                conversion = isImperial ? 3.28084 : 1,
                dist = geoLonToMeters(loc2[0] - loc1[0], lat) * conversion,
                scale = {
              dist: 0,
              px: 0,
              text: ''
            },
                buckets,
                i,
                val,
                dLon;

            if (isImperial) {
              buckets = [5280000, 528000, 52800, 5280, 500, 50, 5, 1];
            } else {
              buckets = [5000000, 500000, 50000, 5000, 500, 50, 5, 1];
            } // determine a user-friendly endpoint for the scale


            for (i = 0; i < buckets.length; i++) {
              val = buckets[i];

              if (dist >= val) {
                scale.dist = Math.floor(dist / val) * val;
                break;
              } else {
                scale.dist = +dist.toFixed(2);
              }
            }

            dLon = geoMetersToLon(scale.dist / conversion, lat);
            scale.px = Math.round(projection([loc1[0] + dLon, loc1[1]])[0]);
            scale.text = displayLength(scale.dist / conversion, isImperial);
            return scale;
          }

          function update(selection) {
            // choose loc1, loc2 along bottom of viewport (near where the scale will be drawn)
            var dims = context.map().dimensions(),
                loc1 = projection.invert([0, dims[1]]),
                loc2 = projection.invert([maxLength, dims[1]]),
                scale = scaleDefs(loc1, loc2);
            selection.select('.scale-path').attr('d', 'M0.5,0.5v' + tickHeight + 'h' + scale.px + 'v-' + tickHeight);
            selection.select('.scale-text').style(_mainLocalizer.textDirection() === 'ltr' ? 'left' : 'right', scale.px + 16 + 'px').html(scale.text);
          }

          return function (selection) {
            function switchUnits() {
              isImperial = !isImperial;
              selection.call(update);
            }

            var scalegroup = selection.append('svg').attr('class', 'scale').on('click', switchUnits).append('g').attr('transform', 'translate(10,11)');
            scalegroup.append('path').attr('class', 'scale-path');
            selection.append('div').attr('class', 'scale-text');
            selection.call(update);
            context.map().on('move.scale', function () {
              update(selection);
            });
          };
        }

        function uiShortcuts(context) {
          var detected = utilDetect();
          var _activeTab = 0;

          var _modalSelection;

          var _selection = select(null);

          var _dataShortcuts;

          function shortcutsModal(_modalSelection) {
            _modalSelection.select('.modal').classed('modal-shortcuts', true);

            var content = _modalSelection.select('.content');

            content.append('div').attr('class', 'modal-section').append('h3').html(_t.html('shortcuts.title'));
            _mainFileFetcher.get('shortcuts').then(function (data) {
              _dataShortcuts = data;
              content.call(render);
            })["catch"](function () {
              /* ignore */
            });
          }

          function render(selection) {
            if (!_dataShortcuts) return;
            var wrapper = selection.selectAll('.wrapper').data([0]);
            var wrapperEnter = wrapper.enter().append('div').attr('class', 'wrapper modal-section');
            var tabsBar = wrapperEnter.append('div').attr('class', 'tabs-bar');
            var shortcutsList = wrapperEnter.append('div').attr('class', 'shortcuts-list');
            wrapper = wrapper.merge(wrapperEnter);
            var tabs = tabsBar.selectAll('.tab').data(_dataShortcuts);
            var tabsEnter = tabs.enter().append('a').attr('class', 'tab').attr('href', '#').on('click', function (d3_event, d) {
              d3_event.preventDefault();

              var i = _dataShortcuts.indexOf(d);

              _activeTab = i;
              render(selection);
            });
            tabsEnter.append('span').html(function (d) {
              return _t.html(d.text);
            }); // Update

            wrapper.selectAll('.tab').classed('active', function (d, i) {
              return i === _activeTab;
            });
            var shortcuts = shortcutsList.selectAll('.shortcut-tab').data(_dataShortcuts);
            var shortcutsEnter = shortcuts.enter().append('div').attr('class', function (d) {
              return 'shortcut-tab shortcut-tab-' + d.tab;
            });
            var columnsEnter = shortcutsEnter.selectAll('.shortcut-column').data(function (d) {
              return d.columns;
            }).enter().append('table').attr('class', 'shortcut-column');
            var rowsEnter = columnsEnter.selectAll('.shortcut-row').data(function (d) {
              return d.rows;
            }).enter().append('tr').attr('class', 'shortcut-row');
            var sectionRows = rowsEnter.filter(function (d) {
              return !d.shortcuts;
            });
            sectionRows.append('td');
            sectionRows.append('td').attr('class', 'shortcut-section').append('h3').html(function (d) {
              return _t.html(d.text);
            });
            var shortcutRows = rowsEnter.filter(function (d) {
              return d.shortcuts;
            });
            var shortcutKeys = shortcutRows.append('td').attr('class', 'shortcut-keys');
            var modifierKeys = shortcutKeys.filter(function (d) {
              return d.modifiers;
            });
            modifierKeys.selectAll('kbd.modifier').data(function (d) {
              if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
                return ['⌘'];
              } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
                return [];
              } else {
                return d.modifiers;
              }
            }).enter().each(function () {
              var selection = select(this);
              selection.append('kbd').attr('class', 'modifier').html(function (d) {
                return uiCmd.display(d);
              });
              selection.append('span').html('+');
            });
            shortcutKeys.selectAll('kbd.shortcut').data(function (d) {
              var arr = d.shortcuts;

              if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
                arr = ['Y'];
              } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
                arr = ['F11'];
              } // replace translations


              arr = arr.map(function (s) {
                return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
              });
              return utilArrayUniq(arr).map(function (s) {
                return {
                  shortcut: s,
                  separator: d.separator,
                  suffix: d.suffix
                };
              });
            }).enter().each(function (d, i, nodes) {
              var selection = select(this);
              var click = d.shortcut.toLowerCase().match(/(.*).click/);

              if (click && click[1]) {
                // replace "left_click", "right_click" with mouse icon
                selection.call(svgIcon('#iD-walkthrough-mouse-' + click[1], 'operation'));
              } else if (d.shortcut.toLowerCase() === 'long-press') {
                selection.call(svgIcon('#iD-walkthrough-longpress', 'longpress operation'));
              } else if (d.shortcut.toLowerCase() === 'tap') {
                selection.call(svgIcon('#iD-walkthrough-tap', 'tap operation'));
              } else {
                selection.append('kbd').attr('class', 'shortcut').html(function (d) {
                  return d.shortcut;
                });
              }

              if (i < nodes.length - 1) {
                selection.append('span').html(d.separator || "\xA0" + _t.html('shortcuts.or') + "\xA0");
              } else if (i === nodes.length - 1 && d.suffix) {
                selection.append('span').html(d.suffix);
              }
            });
            shortcutKeys.filter(function (d) {
              return d.gesture;
            }).each(function () {
              var selection = select(this);
              selection.append('span').html('+');
              selection.append('span').attr('class', 'gesture').html(function (d) {
                return _t.html(d.gesture);
              });
            });
            shortcutRows.append('td').attr('class', 'shortcut-desc').html(function (d) {
              return d.text ? _t.html(d.text) : "\xA0";
            }); // Update

            wrapper.selectAll('.shortcut-tab').style('display', function (d, i) {
              return i === _activeTab ? 'flex' : 'none';
            });
          }

          return function (selection, show) {
            _selection = selection;

            if (show) {
              _modalSelection = uiModal(selection);

              _modalSelection.call(shortcutsModal);
            } else {
              context.keybinding().on([_t('shortcuts.toggle.key'), '?'], function () {
                if (context.container().selectAll('.modal-shortcuts').size()) {
                  // already showing
                  if (_modalSelection) {
                    _modalSelection.close();

                    _modalSelection = null;
                  }
                } else {
                  _modalSelection = uiModal(_selection);

                  _modalSelection.call(shortcutsModal);
                }
              });
            }
          };
        }

        function uiDataHeader() {
          var _datum;

          function dataHeader(selection) {
            var header = selection.selectAll('.data-header').data(_datum ? [_datum] : [], function (d) {
              return d.__featurehash__;
            });
            header.exit().remove();
            var headerEnter = header.enter().append('div').attr('class', 'data-header');
            var iconEnter = headerEnter.append('div').attr('class', 'data-header-icon');
            iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-data', 'note-fill'));
            headerEnter.append('div').attr('class', 'data-header-label').html(_t.html('map_data.layers.custom.title'));
          }

          dataHeader.datum = function (val) {
            if (!arguments.length) return _datum;
            _datum = val;
            return this;
          };

          return dataHeader;
        }

        // It is keyed on the `value` of the entry. Data should be an array of objects like:
        //   [{
        //       value:   'string value',  // required
        //       display: 'label html'     // optional
        //       title:   'hover text'     // optional
        //       terms:   ['search terms'] // optional
        //   }, ...]

        var _comboHideTimerID;

        function uiCombobox(context, klass) {
          var dispatch = dispatch$8('accept', 'cancel');
          var container = context.container();
          var _suggestions = [];
          var _data = [];
          var _fetched = {};
          var _selected = null;
          var _canAutocomplete = true;
          var _caseSensitive = false;
          var _cancelFetch = false;
          var _minItems = 2;
          var _tDown = 0;

          var _mouseEnterHandler, _mouseLeaveHandler;

          var _fetcher = function _fetcher(val, cb) {
            cb(_data.filter(function (d) {
              var terms = d.terms || [];
              terms.push(d.value);
              return terms.some(function (term) {
                return term.toString().toLowerCase().indexOf(val.toLowerCase()) !== -1;
              });
            }));
          };

          var combobox = function combobox(input, attachTo) {
            if (!input || input.empty()) return;
            input.classed('combobox-input', true).on('focus.combo-input', focus).on('blur.combo-input', blur).on('keydown.combo-input', keydown).on('keyup.combo-input', keyup).on('input.combo-input', change).on('mousedown.combo-input', mousedown).each(function () {
              var parent = this.parentNode;
              var sibling = this.nextSibling;
              select(parent).selectAll('.combobox-caret').filter(function (d) {
                return d === input.node();
              }).data([input.node()]).enter().insert('div', function () {
                return sibling;
              }).attr('class', 'combobox-caret').on('mousedown.combo-caret', function (d3_event) {
                d3_event.preventDefault(); // don't steal focus from input

                input.node().focus(); // focus the input as if it was clicked

                mousedown(d3_event);
              }).on('mouseup.combo-caret', function (d3_event) {
                d3_event.preventDefault(); // don't steal focus from input

                mouseup(d3_event);
              });
            });

            function mousedown(d3_event) {
              if (d3_event.button !== 0) return; // left click only

              _tDown = +new Date(); // clear selection

              var start = input.property('selectionStart');
              var end = input.property('selectionEnd');

              if (start !== end) {
                var val = utilGetSetValue(input);
                input.node().setSelectionRange(val.length, val.length);
                return;
              }

              input.on('mouseup.combo-input', mouseup);
            }

            function mouseup(d3_event) {
              input.on('mouseup.combo-input', null);
              if (d3_event.button !== 0) return; // left click only

              if (input.node() !== document.activeElement) return; // exit if this input is not focused

              var start = input.property('selectionStart');
              var end = input.property('selectionEnd');
              if (start !== end) return; // exit if user is selecting
              // not showing or showing for a different field - try to show it.

              var combo = container.selectAll('.combobox');

              if (combo.empty() || combo.datum() !== input.node()) {
                var tOrig = _tDown;
                window.setTimeout(function () {
                  if (tOrig !== _tDown) return; // exit if user double clicked

                  fetchComboData('', function () {
                    show();
                    render();
                  });
                }, 250);
              } else {
                hide();
              }
            }

            function focus() {
              fetchComboData(''); // prefetch values (may warm taginfo cache)
            }

            function blur() {
              _comboHideTimerID = window.setTimeout(hide, 75);
            }

            function show() {
              hide(); // remove any existing

              container.insert('div', ':first-child').datum(input.node()).attr('class', 'combobox' + (klass ? ' combobox-' + klass : '')).style('position', 'absolute').style('display', 'block').style('left', '0px').on('mousedown.combo-container', function (d3_event) {
                // prevent moving focus out of the input field
                d3_event.preventDefault();
              });
              container.on('scroll.combo-scroll', render, true);
            }

            function hide() {
              if (_comboHideTimerID) {
                window.clearTimeout(_comboHideTimerID);
                _comboHideTimerID = undefined;
              }

              container.selectAll('.combobox').remove();
              container.on('scroll.combo-scroll', null);
            }

            function keydown(d3_event) {
              var shown = !container.selectAll('.combobox').empty();
              var tagName = input.node() ? input.node().tagName.toLowerCase() : '';

              switch (d3_event.keyCode) {
                case 8: // ⌫ Backspace

                case 46:
                  // ⌦ Delete
                  d3_event.stopPropagation();
                  _selected = null;
                  render();
                  input.on('input.combo-input', function () {
                    var start = input.property('selectionStart');
                    input.node().setSelectionRange(start, start);
                    input.on('input.combo-input', change);
                  });
                  break;

                case 9:
                  // ⇥ Tab
                  accept();
                  break;

                case 13:
                  // ↩ Return
                  d3_event.preventDefault();
                  d3_event.stopPropagation();
                  break;

                case 38:
                  // ↑ Up arrow
                  if (tagName === 'textarea' && !shown) return;
                  d3_event.preventDefault();

                  if (tagName === 'input' && !shown) {
                    show();
                  }

                  nav(-1);
                  break;

                case 40:
                  // ↓ Down arrow
                  if (tagName === 'textarea' && !shown) return;
                  d3_event.preventDefault();

                  if (tagName === 'input' && !shown) {
                    show();
                  }

                  nav(+1);
                  break;
              }
            }

            function keyup(d3_event) {
              switch (d3_event.keyCode) {
                case 27:
                  // ⎋ Escape
                  cancel();
                  break;

                case 13:
                  // ↩ Return
                  accept();
                  break;
              }
            } // Called whenever the input value is changed (e.g. on typing)


            function change() {
              fetchComboData(value(), function () {
                _selected = null;
                var val = input.property('value');

                if (_suggestions.length) {
                  if (input.property('selectionEnd') === val.length) {
                    _selected = tryAutocomplete();
                  }

                  if (!_selected) {
                    _selected = val;
                  }
                }

                if (val.length) {
                  var combo = container.selectAll('.combobox');

                  if (combo.empty()) {
                    show();
                  }
                } else {
                  hide();
                }

                render();
              });
            } // Called when the user presses up/down arrows to navigate the list


            function nav(dir) {
              if (_suggestions.length) {
                // try to determine previously selected index..
                var index = -1;

                for (var i = 0; i < _suggestions.length; i++) {
                  if (_selected && _suggestions[i].value === _selected) {
                    index = i;
                    break;
                  }
                } // pick new _selected


                index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
                _selected = _suggestions[index].value;
                input.property('value', _selected);
              }

              render();
              ensureVisible();
            }

            function ensureVisible() {
              var combo = container.selectAll('.combobox');
              if (combo.empty()) return;
              var containerRect = container.node().getBoundingClientRect();
              var comboRect = combo.node().getBoundingClientRect();

              if (comboRect.bottom > containerRect.bottom) {
                var node = attachTo ? attachTo.node() : input.node();
                node.scrollIntoView({
                  behavior: 'instant',
                  block: 'center'
                });
                render();
              } // https://stackoverflow.com/questions/11039885/scrollintoview-causing-the-whole-page-to-move


              var selected = combo.selectAll('.combobox-option.selected').node();

              if (selected) {
                selected.scrollIntoView({
                  behavior: 'smooth',
                  block: 'nearest'
                });
              }
            }

            function value() {
              var value = input.property('value');
              var start = input.property('selectionStart');
              var end = input.property('selectionEnd');

              if (start && end) {
                value = value.substring(0, start);
              }

              return value;
            }

            function fetchComboData(v, cb) {
              _cancelFetch = false;

              _fetcher.call(input, v, function (results) {
                // already chose a value, don't overwrite or autocomplete it
                if (_cancelFetch) return;
                _suggestions = results;
                results.forEach(function (d) {
                  _fetched[d.value] = d;
                });

                if (cb) {
                  cb();
                }
              });
            }

            function tryAutocomplete() {
              if (!_canAutocomplete) return;
              var val = _caseSensitive ? value() : value().toLowerCase();
              if (!val) return; // Don't autocomplete if user is typing a number - #4935

              if (!isNaN(parseFloat(val)) && isFinite(val)) return;
              var bestIndex = -1;

              for (var i = 0; i < _suggestions.length; i++) {
                var suggestion = _suggestions[i].value;
                var compare = _caseSensitive ? suggestion : suggestion.toLowerCase(); // if search string matches suggestion exactly, pick it..

                if (compare === val) {
                  bestIndex = i;
                  break; // otherwise lock in the first result that starts with the search string..
                } else if (bestIndex === -1 && compare.indexOf(val) === 0) {
                  bestIndex = i;
                }
              }

              if (bestIndex !== -1) {
                var bestVal = _suggestions[bestIndex].value;
                input.property('value', bestVal);
                input.node().setSelectionRange(val.length, bestVal.length);
                return bestVal;
              }
            }

            function render() {
              if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
                hide();
                return;
              }

              var shown = !container.selectAll('.combobox').empty();
              if (!shown) return;
              var combo = container.selectAll('.combobox');
              var options = combo.selectAll('.combobox-option').data(_suggestions, function (d) {
                return d.value;
              });
              options.exit().remove(); // enter/update

              options.enter().append('a').attr('class', function (d) {
                return 'combobox-option ' + (d.klass || '');
              }).attr('title', function (d) {
                return d.title;
              }).html(function (d) {
                return d.display || d.value;
              }).on('mouseenter', _mouseEnterHandler).on('mouseleave', _mouseLeaveHandler).merge(options).classed('selected', function (d) {
                return d.value === _selected;
              }).on('click.combo-option', accept).order();
              var node = attachTo ? attachTo.node() : input.node();
              var containerRect = container.node().getBoundingClientRect();
              var rect = node.getBoundingClientRect();
              combo.style('left', rect.left + 5 - containerRect.left + 'px').style('width', rect.width - 10 + 'px').style('top', rect.height + rect.top - containerRect.top + 'px');
            } // Dispatches an 'accept' event
            // Then hides the combobox.


            function accept(d3_event, d) {
              _cancelFetch = true;
              var thiz = input.node();

              if (d) {
                // user clicked on a suggestion
                utilGetSetValue(input, d.value); // replace field contents

                utilTriggerEvent(input, 'change');
              } // clear (and keep) selection


              var val = utilGetSetValue(input);
              thiz.setSelectionRange(val.length, val.length);
              d = _fetched[val];
              dispatch.call('accept', thiz, d, val);
              hide();
            } // Dispatches an 'cancel' event
            // Then hides the combobox.


            function cancel() {
              _cancelFetch = true;
              var thiz = input.node(); // clear (and remove) selection, and replace field contents

              var val = utilGetSetValue(input);
              var start = input.property('selectionStart');
              var end = input.property('selectionEnd');
              val = val.slice(0, start) + val.slice(end);
              utilGetSetValue(input, val);
              thiz.setSelectionRange(val.length, val.length);
              dispatch.call('cancel', thiz);
              hide();
            }
          };

          combobox.canAutocomplete = function (val) {
            if (!arguments.length) return _canAutocomplete;
            _canAutocomplete = val;
            return combobox;
          };

          combobox.caseSensitive = function (val) {
            if (!arguments.length) return _caseSensitive;
            _caseSensitive = val;
            return combobox;
          };

          combobox.data = function (val) {
            if (!arguments.length) return _data;
            _data = val;
            return combobox;
          };

          combobox.fetcher = function (val) {
            if (!arguments.length) return _fetcher;
            _fetcher = val;
            return combobox;
          };

          combobox.minItems = function (val) {
            if (!arguments.length) return _minItems;
            _minItems = val;
            return combobox;
          };

          combobox.itemsMouseEnter = function (val) {
            if (!arguments.length) return _mouseEnterHandler;
            _mouseEnterHandler = val;
            return combobox;
          };

          combobox.itemsMouseLeave = function (val) {
            if (!arguments.length) return _mouseLeaveHandler;
            _mouseLeaveHandler = val;
            return combobox;
          };

          return utilRebind(combobox, dispatch, 'on');
        }

        uiCombobox.off = function (input, context) {
          input.on('focus.combo-input', null).on('blur.combo-input', null).on('keydown.combo-input', null).on('keyup.combo-input', null).on('input.combo-input', null).on('mousedown.combo-input', null).on('mouseup.combo-input', null);
          context.container().on('scroll.combo-scroll', null);
        };

        function uiDisclosure(context, key, expandedDefault) {
          var dispatch = dispatch$8('toggled');

          var _expanded;

          var _label = utilFunctor('');

          var _updatePreference = true;

          var _content = function _content() {};

          var disclosure = function disclosure(selection) {
            if (_expanded === undefined || _expanded === null) {
              // loading _expanded here allows it to be reset by calling `disclosure.expanded(null)`
              var preference = corePreferences('disclosure.' + key + '.expanded');
              _expanded = preference === null ? !!expandedDefault : preference === 'true';
            }

            var hideToggle = selection.selectAll('.hide-toggle-' + key).data([0]); // enter

            var hideToggleEnter = hideToggle.enter().append('a').attr('href', '#').attr('class', 'hide-toggle hide-toggle-' + key).call(svgIcon('', 'pre-text', 'hide-toggle-icon'));
            hideToggleEnter.append('span').attr('class', 'hide-toggle-text'); // update

            hideToggle = hideToggleEnter.merge(hideToggle);
            hideToggle.on('click', toggle).classed('expanded', _expanded);
            hideToggle.selectAll('.hide-toggle-text').html(_label());
            hideToggle.selectAll('.hide-toggle-icon').attr('xlink:href', _expanded ? '#iD-icon-down' : _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward');
            var wrap = selection.selectAll('.disclosure-wrap').data([0]); // enter/update

            wrap = wrap.enter().append('div').attr('class', 'disclosure-wrap disclosure-wrap-' + key).merge(wrap).classed('hide', !_expanded);

            if (_expanded) {
              wrap.call(_content);
            }

            function toggle(d3_event) {
              d3_event.preventDefault();
              _expanded = !_expanded;

              if (_updatePreference) {
                corePreferences('disclosure.' + key + '.expanded', _expanded);
              }

              hideToggle.classed('expanded', _expanded);
              hideToggle.selectAll('.hide-toggle-icon').attr('xlink:href', _expanded ? '#iD-icon-down' : _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward');
              wrap.call(uiToggle(_expanded));

              if (_expanded) {
                wrap.call(_content);
              }

              dispatch.call('toggled', this, _expanded);
            }
          };

          disclosure.label = function (val) {
            if (!arguments.length) return _label;
            _label = utilFunctor(val);
            return disclosure;
          };

          disclosure.expanded = function (val) {
            if (!arguments.length) return _expanded;
            _expanded = val;
            return disclosure;
          };

          disclosure.updatePreference = function (val) {
            if (!arguments.length) return _updatePreference;
            _updatePreference = val;
            return disclosure;
          };

          disclosure.content = function (val) {
            if (!arguments.length) return _content;
            _content = val;
            return disclosure;
          };

          return utilRebind(disclosure, dispatch, 'on');
        }

        // Can be labeled and collapsible.

        function uiSection(id, context) {
          var _classes = utilFunctor('');

          var _shouldDisplay;

          var _content;

          var _disclosure;

          var _label;

          var _expandedByDefault = utilFunctor(true);

          var _disclosureContent;

          var _disclosureExpanded;

          var _containerSelection = select(null);

          var section = {
            id: id
          };

          section.classes = function (val) {
            if (!arguments.length) return _classes;
            _classes = utilFunctor(val);
            return section;
          };

          section.label = function (val) {
            if (!arguments.length) return _label;
            _label = utilFunctor(val);
            return section;
          };

          section.expandedByDefault = function (val) {
            if (!arguments.length) return _expandedByDefault;
            _expandedByDefault = utilFunctor(val);
            return section;
          };

          section.shouldDisplay = function (val) {
            if (!arguments.length) return _shouldDisplay;
            _shouldDisplay = utilFunctor(val);
            return section;
          };

          section.content = function (val) {
            if (!arguments.length) return _content;
            _content = val;
            return section;
          };

          section.disclosureContent = function (val) {
            if (!arguments.length) return _disclosureContent;
            _disclosureContent = val;
            return section;
          };

          section.disclosureExpanded = function (val) {
            if (!arguments.length) return _disclosureExpanded;
            _disclosureExpanded = val;
            return section;
          }; // may be called multiple times


          section.render = function (selection) {
            _containerSelection = selection.selectAll('.section-' + id).data([0]);

            var sectionEnter = _containerSelection.enter().append('div').attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));

            _containerSelection = sectionEnter.merge(_containerSelection);

            _containerSelection.call(renderContent);
          };

          section.reRender = function () {
            _containerSelection.call(renderContent);
          };

          section.selection = function () {
            return _containerSelection;
          };

          section.disclosure = function () {
            return _disclosure;
          }; // may be called multiple times


          function renderContent(selection) {
            if (_shouldDisplay) {
              var shouldDisplay = _shouldDisplay();

              selection.classed('hide', !shouldDisplay);

              if (!shouldDisplay) {
                selection.html('');
                return;
              }
            }

            if (_disclosureContent) {
              if (!_disclosure) {
                _disclosure = uiDisclosure(context, id.replace(/-/g, '_'), _expandedByDefault()).label(_label || '')
                /*.on('toggled', function(expanded) {
                    if (expanded) { selection.node().parentNode.scrollTop += 200; }
                })*/
                .content(_disclosureContent);
              }

              if (_disclosureExpanded !== undefined) {
                _disclosure.expanded(_disclosureExpanded);

                _disclosureExpanded = undefined;
              }

              selection.call(_disclosure);
              return;
            }

            if (_content) {
              selection.call(_content);
            }
          }

          return section;
        }

        // {
        //   key: 'string',     // required
        //   value: 'string'    // optional
        // }
        //   -or-
        // {
        //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
        // }
        //

        function uiTagReference(what) {
          var wikibase = what.qid ? services.wikidata : services.osmWikibase;
          var tagReference = {};

          var _button = select(null);

          var _body = select(null);

          var _loaded;

          var _showing;

          function load() {
            if (!wikibase) return;

            _button.classed('tag-reference-loading', true);

            wikibase.getDocs(what, gotDocs);
          }

          function gotDocs(err, docs) {
            _body.html('');

            if (!docs || !docs.title) {
              _body.append('p').attr('class', 'tag-reference-description').html(_t.html('inspector.no_documentation_key'));

              done();
              return;
            }

            if (docs.imageURL) {
              _body.append('img').attr('class', 'tag-reference-wiki-image').attr('src', docs.imageURL).on('load', function () {
                done();
              }).on('error', function () {
                select(this).remove();
                done();
              });
            } else {
              done();
            }

            _body.append('p').attr('class', 'tag-reference-description').html(docs.description ? _mainLocalizer.htmlForLocalizedText(docs.description, docs.descriptionLocaleCode) : _t.html('inspector.no_documentation_key')).append('a').attr('class', 'tag-reference-edit').attr('target', '_blank').attr('title', _t('inspector.edit_reference')).attr('href', docs.editURL).call(svgIcon('#iD-icon-edit', 'inline'));

            if (docs.wiki) {
              _body.append('a').attr('class', 'tag-reference-link').attr('target', '_blank').attr('href', docs.wiki.url).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html(docs.wiki.text));
            } // Add link to info about "good changeset comments" - #2923


            if (what.key === 'comment') {
              _body.append('a').attr('class', 'tag-reference-comment-link').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', _t('commit.about_changeset_comments_link')).append('span').html(_t.html('commit.about_changeset_comments'));
            }
          }

          function done() {
            _loaded = true;

            _button.classed('tag-reference-loading', false);

            _body.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1');

            _showing = true;

            _button.selectAll('svg.icon use').each(function () {
              var iconUse = select(this);

              if (iconUse.attr('href') === '#iD-icon-info') {
                iconUse.attr('href', '#iD-icon-info-filled');
              }
            });
          }

          function hide() {
            _body.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
              _body.classed('expanded', false);
            });

            _showing = false;

            _button.selectAll('svg.icon use').each(function () {
              var iconUse = select(this);

              if (iconUse.attr('href') === '#iD-icon-info-filled') {
                iconUse.attr('href', '#iD-icon-info');
              }
            });
          }

          tagReference.button = function (selection, klass, iconName) {
            _button = selection.selectAll('.tag-reference-button').data([0]);
            _button = _button.enter().append('button').attr('class', 'tag-reference-button ' + (klass || '')).attr('title', _t('icons.information')).call(svgIcon('#iD-icon-' + (iconName || 'inspect'))).merge(_button);

            _button.on('click', function (d3_event) {
              d3_event.stopPropagation();
              d3_event.preventDefault();
              this.blur(); // avoid keeping focus on the button - #4641

              if (_showing) {
                hide();
              } else if (_loaded) {
                done();
              } else {
                load();
              }
            });
          };

          tagReference.body = function (selection) {
            var itemID = what.qid || what.key + '-' + (what.value || '');
            _body = selection.selectAll('.tag-reference-body').data([itemID], function (d) {
              return d;
            });

            _body.exit().remove();

            _body = _body.enter().append('div').attr('class', 'tag-reference-body').style('max-height', '0').style('opacity', '0').merge(_body);

            if (_showing === false) {
              hide();
            }
          };

          tagReference.showing = function (val) {
            if (!arguments.length) return _showing;
            _showing = val;
            return tagReference;
          };

          return tagReference;
        }

        function uiSectionRawTagEditor(id, context) {
          var section = uiSection(id, context).classes('raw-tag-editor').label(function () {
            var count = Object.keys(_tags).filter(function (d) {
              return d;
            }).length;
            return _t('inspector.title_count', {
              title: _t.html('inspector.tags'),
              count: count
            });
          }).expandedByDefault(false).disclosureContent(renderDisclosureContent);
          var taginfo = services.taginfo;
          var dispatch = dispatch$8('change');
          var availableViews = [{
            id: 'list',
            icon: '#fas-th-list'
          }, {
            id: 'text',
            icon: '#fas-i-cursor'
          }];

          var _tagView = corePreferences('raw-tag-editor-view') || 'list'; // 'list, 'text'


          var _readOnlyTags = []; // the keys in the order we want them to display

          var _orderedKeys = [];
          var _showBlank = false;
          var _pendingChange = null;

          var _state;

          var _presets;

          var _tags;

          var _entityIDs;

          var _didInteract = false;

          function interacted() {
            _didInteract = true;
          }

          function renderDisclosureContent(wrap) {
            // remove deleted keys
            _orderedKeys = _orderedKeys.filter(function (key) {
              return _tags[key] !== undefined;
            }); // When switching to a different entity or changing the state (hover/select)
            // reorder the keys alphabetically.
            // We trigger this by emptying the `_orderedKeys` array, then it will be rebuilt here.
            // Otherwise leave their order alone - #5857, #5927

            var all = Object.keys(_tags).sort();
            var missingKeys = utilArrayDifference(all, _orderedKeys);

            for (var i in missingKeys) {
              _orderedKeys.push(missingKeys[i]);
            } // assemble row data


            var rowData = _orderedKeys.map(function (key, i) {
              return {
                index: i,
                key: key,
                value: _tags[key]
              };
            }); // append blank row last, if necessary


            if (!rowData.length || _showBlank) {
              _showBlank = false;
              rowData.push({
                index: rowData.length,
                key: '',
                value: ''
              });
            } // View Options


            var options = wrap.selectAll('.raw-tag-options').data([0]);
            options.exit().remove();
            var optionsEnter = options.enter().insert('div', ':first-child').attr('class', 'raw-tag-options');
            var optionEnter = optionsEnter.selectAll('.raw-tag-option').data(availableViews, function (d) {
              return d.id;
            }).enter();
            optionEnter.append('button').attr('class', function (d) {
              return 'raw-tag-option raw-tag-option-' + d.id + (_tagView === d.id ? ' selected' : '');
            }).attr('title', function (d) {
              return _t('icons.' + d.id);
            }).on('click', function (d3_event, d) {
              _tagView = d.id;
              corePreferences('raw-tag-editor-view', d.id);
              wrap.selectAll('.raw-tag-option').classed('selected', function (datum) {
                return datum === d;
              });
              wrap.selectAll('.tag-text').classed('hide', d.id !== 'text').each(setTextareaHeight);
              wrap.selectAll('.tag-list, .add-row').classed('hide', d.id !== 'list');
            }).each(function (d) {
              select(this).call(svgIcon(d.icon));
            }); // View as Text

            var textData = rowsToText(rowData);
            var textarea = wrap.selectAll('.tag-text').data([0]);
            textarea = textarea.enter().append('textarea').attr('class', 'tag-text' + (_tagView !== 'text' ? ' hide' : '')).call(utilNoAuto).attr('placeholder', _t('inspector.key_value')).attr('spellcheck', 'false').merge(textarea);
            textarea.call(utilGetSetValue, textData).each(setTextareaHeight).on('input', setTextareaHeight).on('focus', interacted).on('blur', textChanged).on('change', textChanged); // View as List

            var list = wrap.selectAll('.tag-list').data([0]);
            list = list.enter().append('ul').attr('class', 'tag-list' + (_tagView !== 'list' ? ' hide' : '')).merge(list); // Container for the Add button

            var addRowEnter = wrap.selectAll('.add-row').data([0]).enter().append('div').attr('class', 'add-row' + (_tagView !== 'list' ? ' hide' : ''));
            addRowEnter.append('button').attr('class', 'add-tag').call(svgIcon('#iD-icon-plus', 'light')).on('click', addTag);
            addRowEnter.append('div').attr('class', 'space-value'); // preserve space

            addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
            // Tag list items

            var items = list.selectAll('.tag-row').data(rowData, function (d) {
              return d.key;
            });
            items.exit().each(unbind).remove(); // Enter

            var itemsEnter = items.enter().append('li').attr('class', 'tag-row').classed('readonly', isReadOnly);
            var innerWrap = itemsEnter.append('div').attr('class', 'inner-wrap');
            innerWrap.append('div').attr('class', 'key-wrap').append('input').property('type', 'text').attr('class', 'key').call(utilNoAuto).on('focus', interacted).on('blur', keyChange).on('change', keyChange);
            innerWrap.append('div').attr('class', 'value-wrap').append('input').property('type', 'text').attr('class', 'value').call(utilNoAuto).on('focus', interacted).on('blur', valueChange).on('change', valueChange).on('keydown.push-more', pushMore);
            innerWrap.append('button').attr('class', 'form-field-button remove').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete')); // Update

            items = items.merge(itemsEnter).sort(function (a, b) {
              return a.index - b.index;
            });
            items.each(function (d) {
              var row = select(this);
              var key = row.select('input.key'); // propagate bound data

              var value = row.select('input.value'); // propagate bound data

              if (_entityIDs && taginfo && _state !== 'hover') {
                bindTypeahead(key, value);
              }

              var referenceOptions = {
                key: d.key
              };

              if (typeof d.value === 'string') {
                referenceOptions.value = d.value;
              }

              var reference = uiTagReference(referenceOptions);

              if (_state === 'hover') {
                reference.showing(false);
              }

              row.select('.inner-wrap') // propagate bound data
              .call(reference.button);
              row.call(reference.body);
              row.select('button.remove'); // propagate bound data
            });
            items.selectAll('input.key').attr('title', function (d) {
              return d.key;
            }).call(utilGetSetValue, function (d) {
              return d.key;
            }).attr('readonly', function (d) {
              return isReadOnly(d) || typeof d.value !== 'string' || null;
            });
            items.selectAll('input.value').attr('title', function (d) {
              return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : d.value;
            }).classed('mixed', function (d) {
              return Array.isArray(d.value);
            }).attr('placeholder', function (d) {
              return typeof d.value === 'string' ? null : _t('inspector.multiple_values');
            }).call(utilGetSetValue, function (d) {
              return typeof d.value === 'string' ? d.value : '';
            }).attr('readonly', function (d) {
              return isReadOnly(d) || null;
            });
            items.selectAll('button.remove').on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'down', removeTag); // 'click' fires too late - #5878
          }

          function isReadOnly(d) {
            for (var i = 0; i < _readOnlyTags.length; i++) {
              if (d.key.match(_readOnlyTags[i]) !== null) {
                return true;
              }
            }

            return false;
          }

          function setTextareaHeight() {
            if (_tagView !== 'text') return;
            var selection = select(this);
            var matches = selection.node().value.match(/\n/g);
            var lineCount = 2 + Number(matches && matches.length);
            var lineHeight = 20;
            selection.style('height', lineCount * lineHeight + 'px');
          }

          function stringify(s) {
            return JSON.stringify(s).slice(1, -1); // without leading/trailing "
          }

          function unstringify(s) {
            var leading = '';
            var trailing = '';

            if (s.length < 1 || s.charAt(0) !== '"') {
              leading = '"';
            }

            if (s.length < 2 || s.charAt(s.length - 1) !== '"' || s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\') {
              trailing = '"';
            }

            return JSON.parse(leading + s + trailing);
          }

          function rowsToText(rows) {
            var str = rows.filter(function (row) {
              return row.key && row.key.trim() !== '';
            }).map(function (row) {
              var rawVal = row.value;
              if (typeof rawVal !== 'string') rawVal = '*';
              var val = rawVal ? stringify(rawVal) : '';
              return stringify(row.key) + '=' + val;
            }).join('\n');

            if (_state !== 'hover' && str.length) {
              return str + '\n';
            }

            return str;
          }

          function textChanged() {
            var newText = this.value.trim();
            var newTags = {};
            newText.split('\n').forEach(function (row) {
              var m = row.match(/^\s*([^=]+)=(.*)$/);

              if (m !== null) {
                var k = context.cleanTagKey(unstringify(m[1].trim()));
                var v = context.cleanTagValue(unstringify(m[2].trim()));
                newTags[k] = v;
              }
            });
            var tagDiff = utilTagDiff(_tags, newTags);
            if (!tagDiff.length) return;
            _pendingChange = _pendingChange || {};
            tagDiff.forEach(function (change) {
              if (isReadOnly({
                key: change.key
              })) return; // skip unchanged multiselection placeholders

              if (change.newVal === '*' && typeof change.oldVal !== 'string') return;

              if (change.type === '-') {
                _pendingChange[change.key] = undefined;
              } else if (change.type === '+') {
                _pendingChange[change.key] = change.newVal || '';
              }
            });

            if (Object.keys(_pendingChange).length === 0) {
              _pendingChange = null;
              return;
            }

            scheduleChange();
          }

          function pushMore(d3_event) {
            // if pressing Tab on the last value field with content, add a blank row
            if (d3_event.keyCode === 9 && !d3_event.shiftKey && section.selection().selectAll('.tag-list li:last-child input.value').node() === this && utilGetSetValue(select(this))) {
              addTag();
            }
          }

          function bindTypeahead(key, value) {
            if (isReadOnly(key.datum())) return;

            if (Array.isArray(value.datum().value)) {
              value.call(uiCombobox(context, 'tag-value').minItems(1).fetcher(function (value, callback) {
                var keyString = utilGetSetValue(key);
                if (!_tags[keyString]) return;

                var data = _tags[keyString].filter(Boolean).map(function (tagValue) {
                  return {
                    value: tagValue,
                    title: tagValue
                  };
                });

                callback(data);
              }));
              return;
            }

            var geometry = context.graph().geometry(_entityIDs[0]);
            key.call(uiCombobox(context, 'tag-key').fetcher(function (value, callback) {
              taginfo.keys({
                debounce: true,
                geometry: geometry,
                query: value
              }, function (err, data) {
                if (!err) {
                  var filtered = data.filter(function (d) {
                    return _tags[d.value] === undefined;
                  });
                  callback(sort(value, filtered));
                }
              });
            }));
            value.call(uiCombobox(context, 'tag-value').fetcher(function (value, callback) {
              taginfo.values({
                debounce: true,
                key: utilGetSetValue(key),
                geometry: geometry,
                query: value
              }, function (err, data) {
                if (!err) callback(sort(value, data));
              });
            }));

            function sort(value, data) {
              var sameletter = [];
              var other = [];

              for (var i = 0; i < data.length; i++) {
                if (data[i].value.substring(0, value.length) === value) {
                  sameletter.push(data[i]);
                } else {
                  other.push(data[i]);
                }
              }

              return sameletter.concat(other);
            }
          }

          function unbind() {
            var row = select(this);
            row.selectAll('input.key').call(uiCombobox.off, context);
            row.selectAll('input.value').call(uiCombobox.off, context);
          }

          function keyChange(d3_event, d) {
            if (select(this).attr('readonly')) return;
            var kOld = d.key; // exit if we are currently about to delete this row anyway - #6366

            if (_pendingChange && _pendingChange.hasOwnProperty(kOld) && _pendingChange[kOld] === undefined) return;
            var kNew = context.cleanTagKey(this.value.trim()); // allow no change if the key should be readonly

            if (isReadOnly({
              key: kNew
            })) {
              this.value = kOld;
              return;
            }

            if (kNew && kNew !== kOld && _tags[kNew] !== undefined) {
              // new key is already in use, switch focus to the existing row
              this.value = kOld; // reset the key

              section.selection().selectAll('.tag-list input.value').each(function (d) {
                if (d.key === kNew) {
                  // send focus to that other value combo instead
                  var input = select(this).node();
                  input.focus();
                  input.select();
                }
              });
              return;
            }

            var row = this.parentNode.parentNode;
            var inputVal = select(row).selectAll('input.value');
            var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
            _pendingChange = _pendingChange || {};

            if (kOld) {
              _pendingChange[kOld] = undefined;
            }

            _pendingChange[kNew] = vNew; // update the ordered key index so this row doesn't change position

            var existingKeyIndex = _orderedKeys.indexOf(kOld);

            if (existingKeyIndex !== -1) _orderedKeys[existingKeyIndex] = kNew;
            d.key = kNew; // update datum to avoid exit/enter on tag update

            d.value = vNew;
            this.value = kNew;
            utilGetSetValue(inputVal, vNew);
            scheduleChange();
          }

          function valueChange(d3_event, d) {
            if (isReadOnly(d)) return; // exit if this is a multiselection and no value was entered

            if (typeof d.value !== 'string' && !this.value) return; // exit if we are currently about to delete this row anyway - #6366

            if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) return;
            _pendingChange = _pendingChange || {};
            _pendingChange[d.key] = context.cleanTagValue(this.value);
            scheduleChange();
          }

          function removeTag(d3_event, d) {
            if (isReadOnly(d)) return;

            if (d.key === '') {
              // removing the blank row
              _showBlank = false;
              section.reRender();
            } else {
              // remove the key from the ordered key index
              _orderedKeys = _orderedKeys.filter(function (key) {
                return key !== d.key;
              });
              _pendingChange = _pendingChange || {};
              _pendingChange[d.key] = undefined;
              scheduleChange();
            }
          }

          function addTag() {
            // Delay render in case this click is blurring an edited combo.
            // Without the setTimeout, the `content` render would wipe out the pending tag change.
            window.setTimeout(function () {
              _showBlank = true;
              section.reRender();
              section.selection().selectAll('.tag-list li:last-child input.key').node().focus();
            }, 20);
          }

          function scheduleChange() {
            // Cache IDs in case the editor is reloaded before the change event is called. - #6028
            var entityIDs = _entityIDs; // Delay change in case this change is blurring an edited combo. - #5878

            window.setTimeout(function () {
              if (!_pendingChange) return;
              dispatch.call('change', this, entityIDs, _pendingChange);
              _pendingChange = null;
            }, 10);
          }

          section.state = function (val) {
            if (!arguments.length) return _state;

            if (_state !== val) {
              _orderedKeys = [];
              _state = val;
            }

            return section;
          };

          section.presets = function (val) {
            if (!arguments.length) return _presets;
            _presets = val;

            if (_presets && _presets.length && _presets[0].isFallback()) {
              section.disclosureExpanded(true); // don't collapse the disclosure if the mapper used the raw tag editor - #1881
            } else if (!_didInteract) {
              section.disclosureExpanded(null);
            }

            return section;
          };

          section.tags = function (val) {
            if (!arguments.length) return _tags;
            _tags = val;
            return section;
          };

          section.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;

            if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
              _entityIDs = val;
              _orderedKeys = [];
            }

            return section;
          }; // pass an array of regular expressions to test against the tag key


          section.readOnlyTags = function (val) {
            if (!arguments.length) return _readOnlyTags;
            _readOnlyTags = val;
            return section;
          };

          return utilRebind(section, dispatch, 'on');
        }

        function uiDataEditor(context) {
          var dataHeader = uiDataHeader();
          var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context).expandedByDefault(true).readOnlyTags([/./]);

          var _datum;

          function dataEditor(selection) {
            var header = selection.selectAll('.header').data([0]);
            var headerEnter = header.enter().append('div').attr('class', 'header fillL');
            headerEnter.append('button').attr('class', 'close').on('click', function () {
              context.enter(modeBrowse(context));
            }).call(svgIcon('#iD-icon-close'));
            headerEnter.append('h3').html(_t.html('map_data.title'));
            var body = selection.selectAll('.body').data([0]);
            body = body.enter().append('div').attr('class', 'body').merge(body);
            var editor = body.selectAll('.data-editor').data([0]); // enter/update

            editor.enter().append('div').attr('class', 'modal-section data-editor').merge(editor).call(dataHeader.datum(_datum));
            var rte = body.selectAll('.raw-tag-editor').data([0]); // enter/update

            rte.enter().append('div').attr('class', 'raw-tag-editor data-editor').merge(rte).call(rawTagEditor.tags(_datum && _datum.properties || {}).state('hover').render).selectAll('textarea.tag-text').attr('readonly', true).classed('readonly', true);
          }

          dataEditor.datum = function (val) {
            if (!arguments.length) return _datum;
            _datum = val;
            return this;
          };

          return dataEditor;
        }

        var pair_1 = pair;

        function search(input, dims) {
          if (!dims) dims = 'NSEW';
          if (typeof input !== 'string') return null;
          input = input.toUpperCase();
          var regex = /^[\s\,]*([NSEW])?\s*([\-|\—|\―]?[0-9.]+)[°º˚]?\s*(?:([0-9.]+)['’′‘]\s*)?(?:([0-9.]+)(?:''|"|”|″)\s*)?([NSEW])?/;
          var m = input.match(regex);
          if (!m) return null; // no match

          var matched = m[0]; // extract dimension.. m[1] = leading, m[5] = trailing

          var dim;

          if (m[1] && m[5]) {
            // if matched both..
            dim = m[1]; // keep leading

            matched = matched.slice(0, -1); // remove trailing dimension from match
          } else {
            dim = m[1] || m[5];
          } // if unrecognized dimension


          if (dim && dims.indexOf(dim) === -1) return null; // extract DMS

          var deg = m[2] ? parseFloat(m[2]) : 0;
          var min = m[3] ? parseFloat(m[3]) / 60 : 0;
          var sec = m[4] ? parseFloat(m[4]) / 3600 : 0;
          var sign = deg < 0 ? -1 : 1;
          if (dim === 'S' || dim === 'W') sign *= -1;
          return {
            val: (Math.abs(deg) + min + sec) * sign,
            dim: dim,
            matched: matched,
            remain: input.slice(matched.length)
          };
        }

        function pair(input, dims) {
          input = input.trim();
          var one = search(input, dims);
          if (!one) return null;
          input = one.remain.trim();
          var two = search(input, dims);
          if (!two || two.remain) return null;

          if (one.dim) {
            return swapdim(one.val, two.val, one.dim);
          } else {
            return [one.val, two.val];
          }
        }

        function swapdim(a, b, dim) {
          if (dim === 'N' || dim === 'S') return [a, b];
          if (dim === 'W' || dim === 'E') return [b, a];
        }

        function uiFeatureList(context) {
          var _geocodeResults;

          function featureList(selection) {
            var header = selection.append('div').attr('class', 'header fillL');
            header.append('h3').html(_t.html('inspector.feature_list'));
            var searchWrap = selection.append('div').attr('class', 'search-header');
            searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
            var search = searchWrap.append('input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keypress', keypress).on('keydown', keydown).on('input', inputevent);
            var listWrap = selection.append('div').attr('class', 'inspector-body');
            var list = listWrap.append('div').attr('class', 'feature-list');
            context.on('exit.feature-list', clearSearch);
            context.map().on('drawn.feature-list', mapDrawn);
            context.keybinding().on(uiCmd('⌘F'), focusSearch);

            function focusSearch(d3_event) {
              var mode = context.mode() && context.mode().id;
              if (mode !== 'browse') return;
              d3_event.preventDefault();
              search.node().focus();
            }

            function keydown(d3_event) {
              if (d3_event.keyCode === 27) {
                // escape
                search.node().blur();
              }
            }

            function keypress(d3_event) {
              var q = search.property('value'),
                  items = list.selectAll('.feature-list-item');

              if (d3_event.keyCode === 13 && // ↩ Return
              q.length && items.size()) {
                click(d3_event, items.datum());
              }
            }

            function inputevent() {
              _geocodeResults = undefined;
              drawList();
            }

            function clearSearch() {
              search.property('value', '');
              drawList();
            }

            function mapDrawn(e) {
              if (e.full) {
                drawList();
              }
            }

            function features() {
              var result = [];
              var graph = context.graph();
              var visibleCenter = context.map().extent().center();
              var q = search.property('value').toLowerCase();
              if (!q) return result;
              var locationMatch = pair_1(q.toUpperCase()) || q.match(/^(-?\d+\.?\d*)\s+(-?\d+\.?\d*)$/);

              if (locationMatch) {
                var loc = [parseFloat(locationMatch[0]), parseFloat(locationMatch[1])];
                result.push({
                  id: -1,
                  geometry: 'point',
                  type: _t('inspector.location'),
                  name: dmsCoordinatePair([loc[1], loc[0]]),
                  location: loc
                });
              } // A location search takes priority over an ID search


              var idMatch = !locationMatch && q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);

              if (idMatch) {
                var elemType = idMatch[1].charAt(0);
                var elemId = idMatch[2];
                result.push({
                  id: elemType + elemId,
                  geometry: elemType === 'n' ? 'point' : elemType === 'w' ? 'line' : 'relation',
                  type: elemType === 'n' ? _t('inspector.node') : elemType === 'w' ? _t('inspector.way') : _t('inspector.relation'),
                  name: elemId
                });
              }

              var allEntities = graph.entities;
              var localResults = [];

              for (var id in allEntities) {
                var entity = allEntities[id];
                if (!entity) continue;
                var name = utilDisplayName(entity) || '';
                if (name.toLowerCase().indexOf(q) < 0) continue;
                var matched = _mainPresetIndex.match(entity, graph);
                var type = matched && matched.name() || utilDisplayType(entity.id);
                var extent = entity.extent(graph);
                var distance = extent ? geoSphericalDistance(visibleCenter, extent.center()) : 0;
                localResults.push({
                  id: entity.id,
                  entity: entity,
                  geometry: entity.geometry(graph),
                  type: type,
                  name: name,
                  distance: distance
                });
                if (localResults.length > 100) break;
              }

              localResults = localResults.sort(function byDistance(a, b) {
                return a.distance - b.distance;
              });
              result = result.concat(localResults);

              (_geocodeResults || []).forEach(function (d) {
                if (d.osm_type && d.osm_id) {
                  // some results may be missing these - #1890
                  // Make a temporary osmEntity so we can preset match
                  // and better localize the search result - #4725
                  var id = osmEntity.id.fromOSM(d.osm_type, d.osm_id);
                  var tags = {};
                  tags[d["class"]] = d.type;
                  var attrs = {
                    id: id,
                    type: d.osm_type,
                    tags: tags
                  };

                  if (d.osm_type === 'way') {
                    // for ways, add some fake closed nodes
                    attrs.nodes = ['a', 'a']; // so that geometry area is possible
                  }

                  var tempEntity = osmEntity(attrs);
                  var tempGraph = coreGraph([tempEntity]);
                  var matched = _mainPresetIndex.match(tempEntity, tempGraph);
                  var type = matched && matched.name() || utilDisplayType(id);
                  result.push({
                    id: tempEntity.id,
                    geometry: tempEntity.geometry(tempGraph),
                    type: type,
                    name: d.display_name,
                    extent: new geoExtent([parseFloat(d.boundingbox[3]), parseFloat(d.boundingbox[0])], [parseFloat(d.boundingbox[2]), parseFloat(d.boundingbox[1])])
                  });
                }
              });

              if (q.match(/^[0-9]+$/)) {
                // if query is just a number, possibly an OSM ID without a prefix
                result.push({
                  id: 'n' + q,
                  geometry: 'point',
                  type: _t('inspector.node'),
                  name: q
                });
                result.push({
                  id: 'w' + q,
                  geometry: 'line',
                  type: _t('inspector.way'),
                  name: q
                });
                result.push({
                  id: 'r' + q,
                  geometry: 'relation',
                  type: _t('inspector.relation'),
                  name: q
                });
              }

              return result;
            }

            function drawList() {
              var value = search.property('value');
              var results = features();
              list.classed('filtered', value.length);
              var resultsIndicator = list.selectAll('.no-results-item').data([0]).enter().append('button').property('disabled', true).attr('class', 'no-results-item').call(svgIcon('#iD-icon-alert', 'pre-text'));
              resultsIndicator.append('span').attr('class', 'entity-name');
              list.selectAll('.no-results-item .entity-name').html(_t.html('geocoder.no_results_worldwide'));

              if (services.geocoder) {
                list.selectAll('.geocode-item').data([0]).enter().append('button').attr('class', 'geocode-item secondary-action').on('click', geocoderSearch).append('div').attr('class', 'label').append('span').attr('class', 'entity-name').html(_t.html('geocoder.search'));
              }

              list.selectAll('.no-results-item').style('display', value.length && !results.length ? 'block' : 'none');
              list.selectAll('.geocode-item').style('display', value && _geocodeResults === undefined ? 'block' : 'none');
              list.selectAll('.feature-list-item').data([-1]).remove();
              var items = list.selectAll('.feature-list-item').data(results, function (d) {
                return d.id;
              });
              var enter = items.enter().insert('button', '.geocode-item').attr('class', 'feature-list-item').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
              var label = enter.append('div').attr('class', 'label');
              label.each(function (d) {
                select(this).call(svgIcon('#iD-icon-' + d.geometry, 'pre-text'));
              });
              label.append('span').attr('class', 'entity-type').html(function (d) {
                return d.type;
              });
              label.append('span').attr('class', 'entity-name').html(function (d) {
                return d.name;
              });
              enter.style('opacity', 0).transition().style('opacity', 1);
              items.order();
              items.exit().remove();
            }

            function mouseover(d3_event, d) {
              if (d.id === -1) return;
              utilHighlightEntities([d.id], true, context);
            }

            function mouseout(d3_event, d) {
              if (d.id === -1) return;
              utilHighlightEntities([d.id], false, context);
            }

            function click(d3_event, d) {
              d3_event.preventDefault();

              if (d.location) {
                context.map().centerZoomEase([d.location[1], d.location[0]], 19);
              } else if (d.entity) {
                utilHighlightEntities([d.id], false, context);
                context.enter(modeSelect(context, [d.entity.id]));
                context.map().zoomToEase(d.entity);
              } else {
                // download, zoom to, and select the entity with the given ID
                context.zoomToEntity(d.id);
              }
            }

            function geocoderSearch() {
              services.geocoder.search(search.property('value'), function (err, resp) {
                _geocodeResults = resp || [];
                drawList();
              });
            }
          }

          return featureList;
        }

        var getOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;






        // eslint-disable-next-line es/no-string-prototype-startswith -- safe
        var $startsWith = ''.startsWith;
        var min$1 = Math.min;

        var CORRECT_IS_REGEXP_LOGIC$1 = correctIsRegexpLogic('startsWith');
        // https://github.com/zloirock/core-js/pull/702
        var MDN_POLYFILL_BUG$1 = !CORRECT_IS_REGEXP_LOGIC$1 && !!function () {
          var descriptor = getOwnPropertyDescriptor$1(String.prototype, 'startsWith');
          return descriptor && !descriptor.writable;
        }();

        // `String.prototype.startsWith` method
        // https://tc39.es/ecma262/#sec-string.prototype.startswith
        _export({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG$1 && !CORRECT_IS_REGEXP_LOGIC$1 }, {
          startsWith: function startsWith(searchString /* , position = 0 */) {
            var that = String(requireObjectCoercible(this));
            notARegexp(searchString);
            var index = toLength(min$1(arguments.length > 1 ? arguments[1] : undefined, that.length));
            var search = String(searchString);
            return $startsWith
              ? $startsWith.call(that, search, index)
              : that.slice(index, index + search.length) === search;
          }
        });

        function uiSectionEntityIssues(context) {
          // Does the user prefer to expand the active issue?  Useful for viewing tag diff.
          // Expand by default so first timers see it - #6408, #8143
          var preference = corePreferences('entity-issues.reference.expanded');

          var _expanded = preference === null ? true : preference === 'true';

          var _entityIDs = [];
          var _issues = [];

          var _activeIssueID;

          var section = uiSection('entity-issues', context).shouldDisplay(function () {
            return _issues.length > 0;
          }).label(function () {
            return _t('inspector.title_count', {
              title: _t.html('issues.list_title'),
              count: _issues.length
            });
          }).disclosureContent(renderDisclosureContent);
          context.validator().on('validated.entity_issues', function () {
            // Refresh on validated events
            reloadIssues();
            section.reRender();
          }).on('focusedIssue.entity_issues', function (issue) {
            makeActiveIssue(issue.id);
          });

          function reloadIssues() {
            _issues = context.validator().getSharedEntityIssues(_entityIDs, {
              includeDisabledRules: true
            });
          }

          function makeActiveIssue(issueID) {
            _activeIssueID = issueID;
            section.selection().selectAll('.issue-container').classed('active', function (d) {
              return d.id === _activeIssueID;
            });
          }

          function renderDisclosureContent(selection) {
            selection.classed('grouped-items-area', true);
            _activeIssueID = _issues.length > 0 ? _issues[0].id : null;
            var containers = selection.selectAll('.issue-container').data(_issues, function (d) {
              return d.id;
            }); // Exit

            containers.exit().remove(); // Enter

            var containersEnter = containers.enter().append('div').attr('class', 'issue-container');
            var itemsEnter = containersEnter.append('div').attr('class', function (d) {
              return 'issue severity-' + d.severity;
            }).on('mouseover.highlight', function (d3_event, d) {
              // don't hover-highlight the selected entity
              var ids = d.entityIds.filter(function (e) {
                return _entityIDs.indexOf(e) === -1;
              });
              utilHighlightEntities(ids, true, context);
            }).on('mouseout.highlight', function (d3_event, d) {
              var ids = d.entityIds.filter(function (e) {
                return _entityIDs.indexOf(e) === -1;
              });
              utilHighlightEntities(ids, false, context);
            });
            var labelsEnter = itemsEnter.append('div').attr('class', 'issue-label');
            var textEnter = labelsEnter.append('button').attr('class', 'issue-text').on('click', function (d3_event, d) {
              makeActiveIssue(d.id); // expand only the clicked item

              var extent = d.extent(context.graph());

              if (extent) {
                var setZoom = Math.max(context.map().zoom(), 19);
                context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
              }
            });
            textEnter.each(function (d) {
              var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
              select(this).call(svgIcon(iconName, 'issue-icon'));
            });
            textEnter.append('span').attr('class', 'issue-message');
            var infoButton = labelsEnter.append('button').attr('class', 'issue-info-button').attr('title', _t('icons.information')).call(svgIcon('#iD-icon-inspect'));
            infoButton.on('click', function (d3_event) {
              d3_event.stopPropagation();
              d3_event.preventDefault();
              this.blur(); // avoid keeping focus on the button - #4641

              var container = select(this.parentNode.parentNode.parentNode);
              var info = container.selectAll('.issue-info');
              var isExpanded = info.classed('expanded');
              _expanded = !isExpanded;
              corePreferences('entity-issues.reference.expanded', _expanded); // update preference

              if (isExpanded) {
                info.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
                  info.classed('expanded', false);
                });
              } else {
                info.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1').on('end', function () {
                  info.style('max-height', null);
                });
              }
            });
            itemsEnter.append('ul').attr('class', 'issue-fix-list');
            containersEnter.append('div').attr('class', 'issue-info' + (_expanded ? ' expanded' : '')).style('max-height', _expanded ? null : '0').style('opacity', _expanded ? '1' : '0').each(function (d) {
              if (typeof d.reference === 'function') {
                select(this).call(d.reference);
              } else {
                select(this).html(_t.html('inspector.no_documentation_key'));
              }
            }); // Update

            containers = containers.merge(containersEnter).classed('active', function (d) {
              return d.id === _activeIssueID;
            });
            containers.selectAll('.issue-message').html(function (d) {
              return d.message(context);
            }); // fixes

            var fixLists = containers.selectAll('.issue-fix-list');
            var fixes = fixLists.selectAll('.issue-fix-item').data(function (d) {
              return d.fixes ? d.fixes(context) : [];
            }, function (fix) {
              return fix.id;
            });
            fixes.exit().remove();
            var fixesEnter = fixes.enter().append('li').attr('class', 'issue-fix-item');
            var buttons = fixesEnter.append('button').on('click', function (d3_event, d) {
              // not all fixes are actionable
              if (select(this).attr('disabled') || !d.onClick) return; // Don't run another fix for this issue within a second of running one
              // (Necessary for "Select a feature type" fix. Most fixes should only ever run once)

              if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) return;
              d.issue.dateLastRanFix = new Date(); // remove hover-highlighting

              utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
              new Promise(function (resolve, reject) {
                d.onClick(context, resolve, reject);

                if (d.onClick.length <= 1) {
                  // if the fix doesn't take any completion parameters then consider it resolved
                  resolve();
                }
              }).then(function () {
                // revalidate whenever the fix has finished running successfully
                context.validator().validate();
              });
            }).on('mouseover.highlight', function (d3_event, d) {
              utilHighlightEntities(d.entityIds, true, context);
            }).on('mouseout.highlight', function (d3_event, d) {
              utilHighlightEntities(d.entityIds, false, context);
            });
            buttons.each(function (d) {
              var iconName = d.icon || 'iD-icon-wrench';

              if (iconName.startsWith('maki')) {
                iconName += '-15';
              }

              select(this).call(svgIcon('#' + iconName, 'fix-icon'));
            });
            buttons.append('span').attr('class', 'fix-message').html(function (d) {
              return d.title;
            });
            fixesEnter.merge(fixes).selectAll('button').classed('actionable', function (d) {
              return d.onClick;
            }).attr('disabled', function (d) {
              return d.onClick ? null : 'true';
            }).attr('title', function (d) {
              if (d.disabledReason) {
                return d.disabledReason;
              }

              return null;
            });
          }

          section.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;

            if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
              _entityIDs = val;
              _activeIssueID = null;
              reloadIssues();
            }

            return section;
          };

          return section;
        }

        function uiPresetIcon() {
          var _preset;

          var _geometry;

          var _sizeClass = 'medium';

          function isSmall() {
            return _sizeClass === 'small';
          }

          function presetIcon(selection) {
            selection.each(render);
          }

          function getIcon(p, geom) {
            if (isSmall() && p.isFallback && p.isFallback()) return 'iD-icon-' + p.id;
            if (p.icon) return p.icon;
            if (geom === 'line') return 'iD-other-line';
            if (geom === 'vertex') return p.isFallback() ? '' : 'temaki-vertex';
            if (isSmall() && geom === 'point') return '';
            return 'maki-marker-stroked';
          }

          function renderPointBorder(container, drawPoint) {
            var pointBorder = container.selectAll('.preset-icon-point-border').data(drawPoint ? [0] : []);
            pointBorder.exit().remove();
            var pointBorderEnter = pointBorder.enter();
            var w = 40;
            var h = 40;
            pointBorderEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-point-border').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h)).append('path').attr('transform', 'translate(11.5, 8)').attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
            pointBorder = pointBorderEnter.merge(pointBorder);
          }

          function renderCategoryBorder(container, category) {
            var categoryBorder = container.selectAll('.preset-icon-category-border').data(category ? [0] : []);
            categoryBorder.exit().remove();
            var categoryBorderEnter = categoryBorder.enter();
            var d = 60;
            var svgEnter = categoryBorderEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-category-border').attr('width', d).attr('height', d).attr('viewBox', "0 0 ".concat(d, " ").concat(d));
            ['fill', 'stroke'].forEach(function (klass) {
              svgEnter.append('path').attr('class', "area ".concat(klass)).attr('d', 'M9.5,7.5 L25.5,7.5 L28.5,12.5 L49.5,12.5 C51.709139,12.5 53.5,14.290861 53.5,16.5 L53.5,43.5 C53.5,45.709139 51.709139,47.5 49.5,47.5 L10.5,47.5 C8.290861,47.5 6.5,45.709139 6.5,43.5 L6.5,12.5 L9.5,7.5 Z');
            });
            categoryBorder = categoryBorderEnter.merge(categoryBorder);

            if (category) {
              var tagClasses = svgTagClasses().getClassesString(category.members.collection[0].addTags, '');
              categoryBorder.selectAll('path.stroke').attr('class', "area stroke ".concat(tagClasses));
              categoryBorder.selectAll('path.fill').attr('class', "area fill ".concat(tagClasses));
            }
          }

          function renderCircleFill(container, drawVertex) {
            var vertexFill = container.selectAll('.preset-icon-fill-vertex').data(drawVertex ? [0] : []);
            vertexFill.exit().remove();
            var vertexFillEnter = vertexFill.enter();
            var w = 60;
            var h = 60;
            var d = 40;
            vertexFillEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-fill-vertex').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h)).append('circle').attr('cx', w / 2).attr('cy', h / 2).attr('r', d / 2);
            vertexFill = vertexFillEnter.merge(vertexFill);
          }

          function renderSquareFill(container, drawArea, tagClasses) {
            var fill = container.selectAll('.preset-icon-fill-area').data(drawArea ? [0] : []);
            fill.exit().remove();
            var fillEnter = fill.enter();
            var d = isSmall() ? 40 : 60;
            var w = d;
            var h = d;
            var l = d * 2 / 3;
            var c1 = (w - l) / 2;
            var c2 = c1 + l;
            fillEnter = fillEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-fill-area').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
            ['fill', 'stroke'].forEach(function (klass) {
              fillEnter.append('path').attr('d', "M".concat(c1, " ").concat(c1, " L").concat(c1, " ").concat(c2, " L").concat(c2, " ").concat(c2, " L").concat(c2, " ").concat(c1, " Z")).attr('class', "area ".concat(klass));
            });
            var rVertex = 2.5;
            [[c1, c1], [c1, c2], [c2, c2], [c2, c1]].forEach(function (point) {
              fillEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', rVertex);
            });

            if (!isSmall()) {
              var rMidpoint = 1.25;
              [[c1, w / 2], [c2, w / 2], [h / 2, c1], [h / 2, c2]].forEach(function (point) {
                fillEnter.append('circle').attr('class', 'midpoint').attr('cx', point[0]).attr('cy', point[1]).attr('r', rMidpoint);
              });
            }

            fill = fillEnter.merge(fill);
            fill.selectAll('path.stroke').attr('class', "area stroke ".concat(tagClasses));
            fill.selectAll('path.fill').attr('class', "area fill ".concat(tagClasses));
          }

          function renderLine(container, drawLine, tagClasses) {
            var line = container.selectAll('.preset-icon-line').data(drawLine ? [0] : []);
            line.exit().remove();
            var lineEnter = line.enter();
            var d = isSmall() ? 40 : 60; // draw the line parametrically

            var w = d;
            var h = d;
            var y = Math.round(d * 0.72);
            var l = Math.round(d * 0.6);
            var r = 2.5;
            var x1 = (w - l) / 2;
            var x2 = x1 + l;
            lineEnter = lineEnter.append('svg').attr('class', 'preset-icon-line').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
            ['casing', 'stroke'].forEach(function (klass) {
              lineEnter.append('path').attr('d', "M".concat(x1, " ").concat(y, " L").concat(x2, " ").concat(y)).attr('class', "line ".concat(klass));
            });
            [[x1 - 1, y], [x2 + 1, y]].forEach(function (point) {
              lineEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);
            });
            line = lineEnter.merge(line);
            line.selectAll('path.stroke').attr('class', "line stroke ".concat(tagClasses));
            line.selectAll('path.casing').attr('class', "line casing ".concat(tagClasses));
          }

          function renderRoute(container, drawRoute, p) {
            var route = container.selectAll('.preset-icon-route').data(drawRoute ? [0] : []);
            route.exit().remove();
            var routeEnter = route.enter();
            var d = isSmall() ? 40 : 60; // draw the route parametrically

            var w = d;
            var h = d;
            var y1 = Math.round(d * 0.80);
            var y2 = Math.round(d * 0.68);
            var l = Math.round(d * 0.6);
            var r = 2;
            var x1 = (w - l) / 2;
            var x2 = x1 + l / 3;
            var x3 = x2 + l / 3;
            var x4 = x3 + l / 3;
            routeEnter = routeEnter.append('svg').attr('class', 'preset-icon-route').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
            ['casing', 'stroke'].forEach(function (klass) {
              routeEnter.append('path').attr('d', "M".concat(x1, " ").concat(y1, " L").concat(x2, " ").concat(y2)).attr('class', "segment0 line ".concat(klass));
              routeEnter.append('path').attr('d', "M".concat(x2, " ").concat(y2, " L").concat(x3, " ").concat(y1)).attr('class', "segment1 line ".concat(klass));
              routeEnter.append('path').attr('d', "M".concat(x3, " ").concat(y1, " L").concat(x4, " ").concat(y2)).attr('class', "segment2 line ".concat(klass));
            });
            [[x1, y1], [x2, y2], [x3, y1], [x4, y2]].forEach(function (point) {
              routeEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);
            });
            route = routeEnter.merge(route);

            if (drawRoute) {
              var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
              var segmentPresetIDs = routeSegments[routeType];

              for (var i in segmentPresetIDs) {
                var segmentPreset = _mainPresetIndex.item(segmentPresetIDs[i]);
                var segmentTagClasses = svgTagClasses().getClassesString(segmentPreset.tags, '');
                route.selectAll("path.stroke.segment".concat(i)).attr('class', "segment".concat(i, " line stroke ").concat(segmentTagClasses));
                route.selectAll("path.casing.segment".concat(i)).attr('class', "segment".concat(i, " line casing ").concat(segmentTagClasses));
              }
            }
          }

          function renderSvgIcon(container, picon, geom, isFramed, category, tagClasses) {
            var isMaki = picon && /^maki-/.test(picon);
            var isTemaki = picon && /^temaki-/.test(picon);
            var isFa = picon && /^fa[srb]-/.test(picon);
            var isiDIcon = picon && !(isMaki || isTemaki || isFa);
            var icon = container.selectAll('.preset-icon').data(picon ? [0] : []);
            icon.exit().remove();
            icon = icon.enter().append('div').attr('class', 'preset-icon').call(svgIcon('')).merge(icon);
            icon.attr('class', 'preset-icon ' + (geom ? geom + '-geom' : '')).classed('category', category).classed('framed', isFramed).classed('preset-icon-iD', isiDIcon);
            icon.selectAll('svg').attr('class', 'icon ' + picon + ' ' + (!isiDIcon && geom !== 'line' ? '' : tagClasses));
            var suffix = '';

            if (isMaki) {
              suffix = isSmall() && geom === 'point' ? '-11' : '-15';
            }

            icon.selectAll('use').attr('href', '#' + picon + suffix);
          }

          function renderImageIcon(container, imageURL) {
            var imageIcon = container.selectAll('img.image-icon').data(imageURL ? [0] : []);
            imageIcon.exit().remove();
            imageIcon = imageIcon.enter().append('img').attr('class', 'image-icon').on('load', function () {
              return container.classed('showing-img', true);
            }).on('error', function () {
              return container.classed('showing-img', false);
            }).merge(imageIcon);
            imageIcon.attr('src', imageURL);
          } // Route icons are drawn with a zigzag annotation underneath:
          //     o   o
          //    / \ /
          //   o   o
          // This dataset defines the styles that are used to draw the zigzag segments.


          var routeSegments = {
            bicycle: ['highway/cycleway', 'highway/cycleway', 'highway/cycleway'],
            bus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
            trolleybus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
            detour: ['highway/tertiary', 'highway/residential', 'highway/unclassified'],
            ferry: ['route/ferry', 'route/ferry', 'route/ferry'],
            foot: ['highway/footway', 'highway/footway', 'highway/footway'],
            hiking: ['highway/path', 'highway/path', 'highway/path'],
            horse: ['highway/bridleway', 'highway/bridleway', 'highway/bridleway'],
            light_rail: ['railway/light_rail', 'railway/light_rail', 'railway/light_rail'],
            monorail: ['railway/monorail', 'railway/monorail', 'railway/monorail'],
            mtb: ['highway/path', 'highway/track', 'highway/bridleway'],
            pipeline: ['man_made/pipeline', 'man_made/pipeline', 'man_made/pipeline'],
            piste: ['piste/downhill', 'piste/hike', 'piste/nordic'],
            power: ['power/line', 'power/line', 'power/line'],
            road: ['highway/secondary', 'highway/primary', 'highway/trunk'],
            subway: ['railway/subway', 'railway/subway', 'railway/subway'],
            train: ['railway/rail', 'railway/rail', 'railway/rail'],
            tram: ['railway/tram', 'railway/tram', 'railway/tram'],
            waterway: ['waterway/stream', 'waterway/stream', 'waterway/stream']
          };

          function render() {
            var p = _preset.apply(this, arguments);

            var geom = _geometry ? _geometry.apply(this, arguments) : null;

            if (geom === 'relation' && p.tags && (p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route] || p.tags.type === 'waterway')) {
              geom = 'route';
            }

            var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
            var isFallback = isSmall() && p.isFallback && p.isFallback();
            var imageURL = showThirdPartyIcons === 'true' && p.imageURL;
            var picon = getIcon(p, geom);
            var isCategory = !p.setTags;
            var drawPoint = picon && geom === 'point' && isSmall() && !isFallback;
            var drawVertex = picon !== null && geom === 'vertex' && (!isSmall() || !isFallback);
            var drawLine = picon && geom === 'line' && !isFallback && !isCategory;
            var drawArea = picon && geom === 'area' && !isFallback && !isCategory;
            var drawRoute = picon && geom === 'route';
            var isFramed = drawVertex || drawArea || drawLine || drawRoute || isCategory;
            var tags = !isCategory ? p.setTags({}, geom) : {};

            for (var k in tags) {
              if (tags[k] === '*') {
                tags[k] = 'yes';
              }
            }

            var tagClasses = svgTagClasses().getClassesString(tags, '');
            var selection = select(this);
            var container = selection.selectAll('.preset-icon-container').data([0]);
            container = container.enter().append('div').attr('class', "preset-icon-container ".concat(_sizeClass)).merge(container);
            container.classed('showing-img', !!imageURL).classed('fallback', isFallback);
            renderCategoryBorder(container, isCategory && p);
            renderPointBorder(container, drawPoint);
            renderCircleFill(container, drawVertex);
            renderSquareFill(container, drawArea, tagClasses);
            renderLine(container, drawLine, tagClasses);
            renderRoute(container, drawRoute, p);
            renderSvgIcon(container, picon, geom, isFramed, isCategory, tagClasses);
            renderImageIcon(container, imageURL);
          }

          presetIcon.preset = function (val) {
            if (!arguments.length) return _preset;
            _preset = utilFunctor(val);
            return presetIcon;
          };

          presetIcon.geometry = function (val) {
            if (!arguments.length) return _geometry;
            _geometry = utilFunctor(val);
            return presetIcon;
          };

          presetIcon.sizeClass = function (val) {
            if (!arguments.length) return _sizeClass;
            _sizeClass = val;
            return presetIcon;
          };

          return presetIcon;
        }

        function uiSectionFeatureType(context) {
          var dispatch = dispatch$8('choose');
          var _entityIDs = [];
          var _presets = [];

          var _tagReference;

          var section = uiSection('feature-type', context).label(_t.html('inspector.feature_type')).disclosureContent(renderDisclosureContent);

          function renderDisclosureContent(selection) {
            selection.classed('preset-list-item', true);
            selection.classed('mixed-types', _presets.length > 1);
            var presetButtonWrap = selection.selectAll('.preset-list-button-wrap').data([0]).enter().append('div').attr('class', 'preset-list-button-wrap');
            var presetButton = presetButtonWrap.append('button').attr('class', 'preset-list-button preset-reset').call(uiTooltip().title(_t.html('inspector.back_tooltip')).placement('bottom'));
            presetButton.append('div').attr('class', 'preset-icon-container');
            presetButton.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
            presetButtonWrap.append('div').attr('class', 'accessory-buttons');
            var tagReferenceBodyWrap = selection.selectAll('.tag-reference-body-wrap').data([0]);
            tagReferenceBodyWrap = tagReferenceBodyWrap.enter().append('div').attr('class', 'tag-reference-body-wrap').merge(tagReferenceBodyWrap); // update header

            if (_tagReference) {
              selection.selectAll('.preset-list-button-wrap .accessory-buttons').style('display', _presets.length === 1 ? null : 'none').call(_tagReference.button);
              tagReferenceBodyWrap.style('display', _presets.length === 1 ? null : 'none').call(_tagReference.body);
            }

            selection.selectAll('.preset-reset').on('click', function () {
              dispatch.call('choose', this, _presets);
            }).on('pointerdown pointerup mousedown mouseup', function (d3_event) {
              d3_event.preventDefault();
              d3_event.stopPropagation();
            });
            var geometries = entityGeometries();
            selection.select('.preset-list-item button').call(uiPresetIcon().geometry(_presets.length === 1 ? geometries.length === 1 && geometries[0] : null).preset(_presets.length === 1 ? _presets[0] : _mainPresetIndex.item('point')));
            var names = _presets.length === 1 ? [_presets[0].nameLabel(), _presets[0].subtitleLabel()].filter(Boolean) : [_t('inspector.multiple_types')];
            var label = selection.select('.label-inner');
            var nameparts = label.selectAll('.namepart').data(names, function (d) {
              return d;
            });
            nameparts.exit().remove();
            nameparts.enter().append('div').attr('class', 'namepart').html(function (d) {
              return d;
            });
          }

          section.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;
            _entityIDs = val;
            return section;
          };

          section.presets = function (val) {
            if (!arguments.length) return _presets; // don't reload the same preset

            if (!utilArrayIdentical(val, _presets)) {
              _presets = val;

              if (_presets.length === 1) {
                _tagReference = uiTagReference(_presets[0].reference()).showing(false);
              }
            }

            return section;
          };

          function entityGeometries() {
            var counts = {};

            for (var i in _entityIDs) {
              var geometry = context.graph().geometry(_entityIDs[i]);
              if (!counts[geometry]) counts[geometry] = 0;
              counts[geometry] += 1;
            }

            return Object.keys(counts).sort(function (geom1, geom2) {
              return counts[geom2] - counts[geom1];
            });
          }

          return utilRebind(section, dispatch, 'on');
        }

        // It borrows some code from uiHelp

        function uiFieldHelp(context, fieldName) {
          var fieldHelp = {};

          var _inspector = select(null);

          var _wrap = select(null);

          var _body = select(null);

          var fieldHelpKeys = {
            restrictions: [['about', ['about', 'from_via_to', 'maxdist', 'maxvia']], ['inspecting', ['about', 'from_shadow', 'allow_shadow', 'restrict_shadow', 'only_shadow', 'restricted', 'only']], ['modifying', ['about', 'indicators', 'allow_turn', 'restrict_turn', 'only_turn']], ['tips', ['simple', 'simple_example', 'indirect', 'indirect_example', 'indirect_noedit']]]
          };
          var fieldHelpHeadings = {};
          var replacements = {
            distField: _t.html('restriction.controls.distance'),
            viaField: _t.html('restriction.controls.via'),
            fromShadow: icon('#iD-turn-shadow', 'inline shadow from'),
            allowShadow: icon('#iD-turn-shadow', 'inline shadow allow'),
            restrictShadow: icon('#iD-turn-shadow', 'inline shadow restrict'),
            onlyShadow: icon('#iD-turn-shadow', 'inline shadow only'),
            allowTurn: icon('#iD-turn-yes', 'inline turn'),
            restrictTurn: icon('#iD-turn-no', 'inline turn'),
            onlyTurn: icon('#iD-turn-only', 'inline turn')
          }; // For each section, squash all the texts into a single markdown document

          var docs = fieldHelpKeys[fieldName].map(function (key) {
            var helpkey = 'help.field.' + fieldName + '.' + key[0];
            var text = key[1].reduce(function (all, part) {
              var subkey = helpkey + '.' + part;
              var depth = fieldHelpHeadings[subkey]; // is this subkey a heading?

              var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s

              return all + hhh + _t.html(subkey, replacements) + '\n\n';
            }, '');
            return {
              key: helpkey,
              title: _t.html(helpkey + '.title'),
              html: marked_1(text.trim())
            };
          });

          function show() {
            updatePosition();

            _body.classed('hide', false).style('opacity', '0').transition().duration(200).style('opacity', '1');
          }

          function hide() {
            _body.classed('hide', true).transition().duration(200).style('opacity', '0').on('end', function () {
              _body.classed('hide', true);
            });
          }

          function clickHelp(index) {
            var d = docs[index];
            var tkeys = fieldHelpKeys[fieldName][index][1];

            _body.selectAll('.field-help-nav-item').classed('active', function (d, i) {
              return i === index;
            });

            var content = _body.selectAll('.field-help-content').html(d.html); // class the paragraphs so we can find and style them


            content.selectAll('p').attr('class', function (d, i) {
              return tkeys[i];
            }); // insert special content for certain help sections

            if (d.key === 'help.field.restrictions.inspecting') {
              content.insert('img', 'p.from_shadow').attr('class', 'field-help-image cf').attr('src', context.imagePath('tr_inspect.gif'));
            } else if (d.key === 'help.field.restrictions.modifying') {
              content.insert('img', 'p.allow_turn').attr('class', 'field-help-image cf').attr('src', context.imagePath('tr_modify.gif'));
            }
          }

          fieldHelp.button = function (selection) {
            if (_body.empty()) return;
            var button = selection.selectAll('.field-help-button').data([0]); // enter/update

            button.enter().append('button').attr('class', 'field-help-button').call(svgIcon('#iD-icon-help')).merge(button).on('click', function (d3_event) {
              d3_event.stopPropagation();
              d3_event.preventDefault();

              if (_body.classed('hide')) {
                show();
              } else {
                hide();
              }
            });
          };

          function updatePosition() {
            var wrap = _wrap.node();

            var inspector = _inspector.node();

            var wRect = wrap.getBoundingClientRect();
            var iRect = inspector.getBoundingClientRect();

            _body.style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
          }

          fieldHelp.body = function (selection) {
            // This control expects the field to have a form-field-input-wrap div
            _wrap = selection.selectAll('.form-field-input-wrap');
            if (_wrap.empty()) return; // absolute position relative to the inspector, so it "floats" above the fields

            _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
            if (_inspector.empty()) return;
            _body = _inspector.selectAll('.field-help-body').data([0]);

            var enter = _body.enter().append('div').attr('class', 'field-help-body hide'); // initially hidden


            var titleEnter = enter.append('div').attr('class', 'field-help-title cf');
            titleEnter.append('h2').attr('class', _mainLocalizer.textDirection() === 'rtl' ? 'fr' : 'fl').html(_t.html('help.field.' + fieldName + '.title'));
            titleEnter.append('button').attr('class', 'fr close').on('click', function (d3_event) {
              d3_event.stopPropagation();
              d3_event.preventDefault();
              hide();
            }).call(svgIcon('#iD-icon-close'));
            var navEnter = enter.append('div').attr('class', 'field-help-nav cf');
            var titles = docs.map(function (d) {
              return d.title;
            });
            navEnter.selectAll('.field-help-nav-item').data(titles).enter().append('div').attr('class', 'field-help-nav-item').html(function (d) {
              return d;
            }).on('click', function (d3_event, d) {
              d3_event.stopPropagation();
              d3_event.preventDefault();
              clickHelp(titles.indexOf(d));
            });
            enter.append('div').attr('class', 'field-help-content');
            _body = _body.merge(enter);
            clickHelp(0);
          };

          return fieldHelp;
        }

        function uiFieldCheck(field, context) {
          var dispatch = dispatch$8('change');
          var options = field.options;
          var values = [];
          var texts = [];

          var _tags;

          var input = select(null);
          var text = select(null);
          var label = select(null);
          var reverser = select(null);

          var _impliedYes;

          var _entityIDs = [];

          var _value;

          if (options) {
            for (var i in options) {
              var v = options[i];
              values.push(v === 'undefined' ? undefined : v);
              texts.push(field.t.html('options.' + v, {
                'default': v
              }));
            }
          } else {
            values = [undefined, 'yes'];
            texts = [_t.html('inspector.unknown'), _t.html('inspector.check.yes')];

            if (field.type !== 'defaultCheck') {
              values.push('no');
              texts.push(_t.html('inspector.check.no'));
            }
          } // Checks tags to see whether an undefined value is "Assumed to be Yes"


          function checkImpliedYes() {
            _impliedYes = field.id === 'oneway_yes'; // hack: pretend `oneway` field is a `oneway_yes` field
            // where implied oneway tag exists (e.g. `junction=roundabout`) #2220, #1841

            if (field.id === 'oneway') {
              var entity = context.entity(_entityIDs[0]);

              for (var key in entity.tags) {
                if (key in osmOneWayTags && entity.tags[key] in osmOneWayTags[key]) {
                  _impliedYes = true;
                  texts[0] = _t.html('_tagging.presets.fields.oneway_yes.options.undefined');
                  break;
                }
              }
            }
          }

          function reverserHidden() {
            if (!context.container().select('div.inspector-hover').empty()) return true;
            return !(_value === 'yes' || _impliedYes && !_value);
          }

          function reverserSetText(selection) {
            var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
            if (reverserHidden() || !entity) return selection;
            var first = entity.first();
            var last = entity.isClosed() ? entity.nodes[entity.nodes.length - 2] : entity.last();
            var pseudoDirection = first < last;
            var icon = pseudoDirection ? '#iD-icon-forward' : '#iD-icon-backward';
            selection.selectAll('.reverser-span').html(_t.html('inspector.check.reverser')).call(svgIcon(icon, 'inline'));
            return selection;
          }

          var check = function check(selection) {
            checkImpliedYes();
            label = selection.selectAll('.form-field-input-wrap').data([0]);
            var enter = label.enter().append('label').attr('class', 'form-field-input-wrap form-field-input-check');
            enter.append('input').property('indeterminate', field.type !== 'defaultCheck').attr('type', 'checkbox').attr('id', field.domId);
            enter.append('span').html(texts[0]).attr('class', 'value');

            if (field.type === 'onewayCheck') {
              enter.append('button').attr('class', 'reverser' + (reverserHidden() ? ' hide' : '')).append('span').attr('class', 'reverser-span');
            }

            label = label.merge(enter);
            input = label.selectAll('input');
            text = label.selectAll('span.value');
            input.on('click', function (d3_event) {
              d3_event.stopPropagation();
              var t = {};

              if (Array.isArray(_tags[field.key])) {
                if (values.indexOf('yes') !== -1) {
                  t[field.key] = 'yes';
                } else {
                  t[field.key] = values[0];
                }
              } else {
                t[field.key] = values[(values.indexOf(_value) + 1) % values.length];
              } // Don't cycle through `alternating` or `reversible` states - #4970
              // (They are supported as translated strings, but should not toggle with clicks)


              if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
                t[field.key] = values[0];
              }

              dispatch.call('change', this, t);
            });

            if (field.type === 'onewayCheck') {
              reverser = label.selectAll('.reverser');
              reverser.call(reverserSetText).on('click', function (d3_event) {
                d3_event.preventDefault();
                d3_event.stopPropagation();
                context.perform(function (graph) {
                  for (var i in _entityIDs) {
                    graph = actionReverse(_entityIDs[i])(graph);
                  }

                  return graph;
                }, _t('operations.reverse.annotation.line', {
                  n: 1
                })); // must manually revalidate since no 'change' event was called

                context.validator().validate();
                select(this).call(reverserSetText);
              });
            }
          };

          check.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;
            _entityIDs = val;
            return check;
          };

          check.tags = function (tags) {
            _tags = tags;

            function isChecked(val) {
              return val !== 'no' && val !== '' && val !== undefined && val !== null;
            }

            function textFor(val) {
              if (val === '') val = undefined;
              var index = values.indexOf(val);
              return index !== -1 ? texts[index] : '"' + val + '"';
            }

            checkImpliedYes();
            var isMixed = Array.isArray(tags[field.key]);
            _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();

            if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
              _value = 'yes';
            }

            input.property('indeterminate', isMixed || field.type !== 'defaultCheck' && !_value).property('checked', isChecked(_value));
            text.html(isMixed ? _t.html('inspector.multiple_values') : textFor(_value)).classed('mixed', isMixed);
            label.classed('set', !!_value);

            if (field.type === 'onewayCheck') {
              reverser.classed('hide', reverserHidden()).call(reverserSetText);
            }
          };

          check.focus = function () {
            input.node().focus();
          };

          return utilRebind(check, dispatch, 'on');
        }

        function uiFieldCombo(field, context) {
          var dispatch = dispatch$8('change');

          var _isMulti = field.type === 'multiCombo' || field.type === 'manyCombo';

          var _isNetwork = field.type === 'networkCombo';

          var _isSemi = field.type === 'semiCombo';

          var _optarray = field.options;

          var _showTagInfoSuggestions = field.type !== 'manyCombo' && field.autoSuggestions !== false;

          var _allowCustomValues = field.type !== 'manyCombo' && field.customValues !== false;

          var _snake_case = field.snake_case || field.snake_case === undefined;

          var _combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(field.caseSensitive).minItems(_isMulti || _isSemi ? 1 : 2);

          var _container = select(null);

          var _inputWrap = select(null);

          var _input = select(null);

          var _comboData = [];
          var _multiData = [];
          var _entityIDs = [];

          var _tags;

          var _countryCode;

          var _staticPlaceholder; // initialize deprecated tags array


          var _dataDeprecated = [];
          _mainFileFetcher.get('deprecated').then(function (d) {
            _dataDeprecated = d;
          })["catch"](function () {
            /* ignore */
          }); // ensure multiCombo field.key ends with a ':'

          if (_isMulti && field.key && /[^:]$/.test(field.key)) {
            field.key += ':';
          }

          function snake(s) {
            return s.replace(/\s+/g, '_').toLowerCase();
          }

          function clean(s) {
            return s.split(';').map(function (s) {
              return s.trim();
            }).join(';');
          } // returns the tag value for a display value
          // (for multiCombo, dval should be the key suffix, not the entire key)


          function tagValue(dval) {
            dval = clean(dval || '');

            var found = _comboData.find(function (o) {
              return o.key && clean(o.value) === dval;
            });

            if (found) return found.key;

            if (field.type === 'typeCombo' && !dval) {
              return 'yes';
            }

            return (_snake_case ? snake(dval) : dval) || undefined;
          } // returns the display value for a tag value
          // (for multiCombo, tval should be the key suffix, not the entire key)


          function displayValue(tval) {
            tval = tval || '';

            if (field.hasTextForStringId('options.' + tval)) {
              return field.t('options.' + tval, {
                "default": tval
              });
            }

            if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
              return '';
            }

            return tval;
          } // Compute the difference between arrays of objects by `value` property
          //
          // objectDifference([{value:1}, {value:2}, {value:3}], [{value:2}])
          // > [{value:1}, {value:3}]
          //


          function objectDifference(a, b) {
            return a.filter(function (d1) {
              return !b.some(function (d2) {
                return !d2.isMixed && d1.value === d2.value;
              });
            });
          }

          function initCombo(selection, attachTo) {
            if (!_allowCustomValues) {
              selection.attr('readonly', 'readonly');
            }

            if (_showTagInfoSuggestions && services.taginfo) {
              selection.call(_combobox.fetcher(setTaginfoValues), attachTo);
              setTaginfoValues('', setPlaceholder);
            } else {
              selection.call(_combobox, attachTo);
              setStaticValues(setPlaceholder);
            }
          }

          function setStaticValues(callback) {
            if (!_optarray) return;
            _comboData = _optarray.map(function (v) {
              return {
                key: v,
                value: field.t('options.' + v, {
                  "default": v
                }),
                title: v,
                display: field.t.html('options.' + v, {
                  "default": v
                }),
                klass: field.hasTextForStringId('options.' + v) ? '' : 'raw-option'
              };
            });

            _combobox.data(objectDifference(_comboData, _multiData));

            if (callback) callback(_comboData);
          }

          function setTaginfoValues(q, callback) {
            var fn = _isMulti ? 'multikeys' : 'values';
            var query = (_isMulti ? field.key : '') + q;
            var hasCountryPrefix = _isNetwork && _countryCode && _countryCode.indexOf(q.toLowerCase()) === 0;

            if (hasCountryPrefix) {
              query = _countryCode + ':';
            }

            var params = {
              debounce: q !== '',
              key: field.key,
              query: query
            };

            if (_entityIDs.length) {
              params.geometry = context.graph().geometry(_entityIDs[0]);
            }

            services.taginfo[fn](params, function (err, data) {
              if (err) return;
              data = data.filter(function (d) {
                if (field.type === 'typeCombo' && d.value === 'yes') {
                  // don't show the fallback value
                  return false;
                } // don't show values with very low usage


                return !d.count || d.count > 10;
              });
              var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];

              if (deprecatedValues) {
                // don't suggest deprecated tag values
                data = data.filter(function (d) {
                  return deprecatedValues.indexOf(d.value) === -1;
                });
              }

              if (hasCountryPrefix) {
                data = data.filter(function (d) {
                  return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
                });
              } // hide the caret if there are no suggestions


              _container.classed('empty-combobox', data.length === 0);

              _comboData = data.map(function (d) {
                var k = d.value;
                if (_isMulti) k = k.replace(field.key, '');
                var label = field.t('options.' + k, {
                  "default": k
                });
                return {
                  key: k,
                  value: label,
                  display: field.t.html('options.' + k, {
                    "default": k
                  }),
                  title: d.title || label,
                  klass: field.hasTextForStringId('options.' + k) ? '' : 'raw-option'
                };
              });
              _comboData = objectDifference(_comboData, _multiData);
              if (callback) callback(_comboData);
            });
          }

          function setPlaceholder(values) {
            if (_isMulti || _isSemi) {
              _staticPlaceholder = field.placeholder() || _t('inspector.add');
            } else {
              var vals = values.map(function (d) {
                return d.value;
              }).filter(function (s) {
                return s.length < 20;
              });
              var placeholders = vals.length > 1 ? vals : values.map(function (d) {
                return d.key;
              });
              _staticPlaceholder = field.placeholder() || placeholders.slice(0, 3).join(', ');
            }

            if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
              _staticPlaceholder += '…';
            }

            var ph;

            if (!_isMulti && !_isSemi && _tags && Array.isArray(_tags[field.key])) {
              ph = _t('inspector.multiple_values');
            } else {
              ph = _staticPlaceholder;
            }

            _container.selectAll('input').attr('placeholder', ph);
          }

          function change() {
            var t = {};
            var val;

            if (_isMulti || _isSemi) {
              val = tagValue(utilGetSetValue(_input).replace(/,/g, ';')) || '';

              _container.classed('active', false);

              utilGetSetValue(_input, '');
              var vals = val.split(';').filter(Boolean);
              if (!vals.length) return;

              if (_isMulti) {
                utilArrayUniq(vals).forEach(function (v) {
                  var key = (field.key || '') + v;

                  if (_tags) {
                    // don't set a multicombo value to 'yes' if it already has a non-'no' value
                    // e.g. `language:de=main`
                    var old = _tags[key];
                    if (typeof old === 'string' && old.toLowerCase() !== 'no') return;
                  }

                  key = context.cleanTagKey(key);
                  field.keys.push(key);
                  t[key] = 'yes';
                });
              } else if (_isSemi) {
                var arr = _multiData.map(function (d) {
                  return d.key;
                });

                arr = arr.concat(vals);
                t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
              }

              window.setTimeout(function () {
                _input.node().focus();
              }, 10);
            } else {
              var rawValue = utilGetSetValue(_input); // don't override multiple values with blank string

              if (!rawValue && Array.isArray(_tags[field.key])) return;
              val = context.cleanTagValue(tagValue(rawValue));
              t[field.key] = val || undefined;
            }

            dispatch.call('change', this, t);
          }

          function removeMultikey(d3_event, d) {
            d3_event.preventDefault();
            d3_event.stopPropagation();
            var t = {};

            if (_isMulti) {
              t[d.key] = undefined;
            } else if (_isSemi) {
              var arr = _multiData.map(function (md) {
                return md.key === d.key ? null : md.key;
              }).filter(Boolean);

              arr = utilArrayUniq(arr);
              t[field.key] = arr.length ? arr.join(';') : undefined;
            }

            dispatch.call('change', this, t);
          }

          function combo(selection) {
            _container = selection.selectAll('.form-field-input-wrap').data([0]);
            var type = _isMulti || _isSemi ? 'multicombo' : 'combo';
            _container = _container.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + type).merge(_container);

            if (_isMulti || _isSemi) {
              _container = _container.selectAll('.chiplist').data([0]);
              var listClass = 'chiplist'; // Use a separate line for each value in the Destinations and Via fields
              // to mimic highway exit signs

              if (field.key === 'destination' || field.key === 'via') {
                listClass += ' full-line-chips';
              }

              _container = _container.enter().append('ul').attr('class', listClass).on('click', function () {
                window.setTimeout(function () {
                  _input.node().focus();
                }, 10);
              }).merge(_container);
              _inputWrap = _container.selectAll('.input-wrap').data([0]);
              _inputWrap = _inputWrap.enter().append('li').attr('class', 'input-wrap').merge(_inputWrap);
              _input = _inputWrap.selectAll('input').data([0]);
            } else {
              _input = _container.selectAll('input').data([0]);
            }

            _input = _input.enter().append('input').attr('type', 'text').attr('id', field.domId).call(utilNoAuto).call(initCombo, selection).merge(_input);

            if (_isNetwork) {
              var extent = combinedEntityExtent();
              var countryCode = extent && iso1A2Code(extent.center());
              _countryCode = countryCode && countryCode.toLowerCase();
            }

            _input.on('change', change).on('blur', change);

            _input.on('keydown.field', function (d3_event) {
              switch (d3_event.keyCode) {
                case 13:
                  // ↩ Return
                  _input.node().blur(); // blurring also enters the value


                  d3_event.stopPropagation();
                  break;
              }
            });

            if (_isMulti || _isSemi) {
              _combobox.on('accept', function () {
                _input.node().blur();

                _input.node().focus();
              });

              _input.on('focus', function () {
                _container.classed('active', true);
              });
            }
          }

          combo.tags = function (tags) {
            _tags = tags;

            if (_isMulti || _isSemi) {
              _multiData = [];
              var maxLength;

              if (_isMulti) {
                // Build _multiData array containing keys already set..
                for (var k in tags) {
                  if (field.key && k.indexOf(field.key) !== 0) continue;
                  if (!field.key && field.keys.indexOf(k) === -1) continue;
                  var v = tags[k];
                  if (!v || typeof v === 'string' && v.toLowerCase() === 'no') continue;
                  var suffix = field.key ? k.substr(field.key.length) : k;

                  _multiData.push({
                    key: k,
                    value: displayValue(suffix),
                    isMixed: Array.isArray(v)
                  });
                }

                if (field.key) {
                  // Set keys for form-field modified (needed for undo and reset buttons)..
                  field.keys = _multiData.map(function (d) {
                    return d.key;
                  }); // limit the input length so it fits after prepending the key prefix

                  maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
                } else {
                  maxLength = context.maxCharsForTagKey();
                }
              } else if (_isSemi) {
                var allValues = [];
                var commonValues;

                if (Array.isArray(tags[field.key])) {
                  tags[field.key].forEach(function (tagVal) {
                    var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
                    allValues = allValues.concat(thisVals);

                    if (!commonValues) {
                      commonValues = thisVals;
                    } else {
                      commonValues = commonValues.filter(function (value) {
                        return thisVals.includes(value);
                      });
                    }
                  });
                  allValues = utilArrayUniq(allValues).filter(Boolean);
                } else {
                  allValues = utilArrayUniq((tags[field.key] || '').split(';')).filter(Boolean);
                  commonValues = allValues;
                }

                _multiData = allValues.map(function (v) {
                  return {
                    key: v,
                    value: displayValue(v),
                    isMixed: !commonValues.includes(v)
                  };
                });
                var currLength = utilUnicodeCharsCount(commonValues.join(';')); // limit the input length to the remaining available characters

                maxLength = context.maxCharsForTagValue() - currLength;

                if (currLength > 0) {
                  // account for the separator if a new value will be appended to existing
                  maxLength -= 1;
                }
              } // a negative maxlength doesn't make sense


              maxLength = Math.max(0, maxLength);
              var allowDragAndDrop = _isSemi // only semiCombo values are ordered
              && !Array.isArray(tags[field.key]); // Exclude existing multikeys from combo options..

              var available = objectDifference(_comboData, _multiData);

              _combobox.data(available); // Hide 'Add' button if this field uses fixed set of
              // options and they're all currently used,
              // or if the field is already at its character limit


              var hideAdd = !_allowCustomValues && !available.length || maxLength <= 0;

              _container.selectAll('.chiplist .input-wrap').style('display', hideAdd ? 'none' : null); // Render chips


              var chips = _container.selectAll('.chip').data(_multiData);

              chips.exit().remove();
              var enter = chips.enter().insert('li', '.input-wrap').attr('class', 'chip');
              enter.append('span');
              enter.append('a');
              chips = chips.merge(enter).order().classed('raw-value', function (d) {
                var k = d.key;
                if (_isMulti) k = k.replace(field.key, '');
                return !field.hasTextForStringId('options.' + k);
              }).classed('draggable', allowDragAndDrop).classed('mixed', function (d) {
                return d.isMixed;
              }).attr('title', function (d) {
                return d.isMixed ? _t('inspector.unshared_value_tooltip') : null;
              });

              if (allowDragAndDrop) {
                registerDragAndDrop(chips);
              }

              chips.select('span').html(function (d) {
                return d.value;
              });
              chips.select('a').attr('href', '#').on('click', removeMultikey).attr('class', 'remove').html('×');
            } else {
              var isMixed = Array.isArray(tags[field.key]);
              var mixedValues = isMixed && tags[field.key].map(function (val) {
                return displayValue(val);
              }).filter(Boolean);
              var showsValue = !isMixed && tags[field.key] && !(field.type === 'typeCombo' && tags[field.key] === 'yes');
              var isRawValue = showsValue && !field.hasTextForStringId('options.' + tags[field.key]);
              var isKnownValue = showsValue && !isRawValue;
              var isReadOnly = !_allowCustomValues || isKnownValue;
              utilGetSetValue(_input, !isMixed ? displayValue(tags[field.key]) : '').classed('raw-value', isRawValue).classed('known-value', isKnownValue).attr('readonly', isReadOnly ? 'readonly' : undefined).attr('title', isMixed ? mixedValues.join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : _staticPlaceholder || '').classed('mixed', isMixed).on('keydown.deleteCapture', function (d3_event) {
                if (isReadOnly && isKnownValue && (d3_event.keyCode === utilKeybinding.keyCodes['⌫'] || d3_event.keyCode === utilKeybinding.keyCodes['⌦'])) {
                  d3_event.preventDefault();
                  d3_event.stopPropagation();
                  var t = {};
                  t[field.key] = undefined;
                  dispatch.call('change', this, t);
                }
              });
            }
          };

          function registerDragAndDrop(selection) {
            // allow drag and drop re-ordering of chips
            var dragOrigin, targetIndex;
            selection.call(d3_drag().on('start', function (d3_event) {
              dragOrigin = {
                x: d3_event.x,
                y: d3_event.y
              };
              targetIndex = null;
            }).on('drag', function (d3_event) {
              var x = d3_event.x - dragOrigin.x,
                  y = d3_event.y - dragOrigin.y;
              if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
              Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
              var index = selection.nodes().indexOf(this);
              select(this).classed('dragging', true);
              targetIndex = null;
              var targetIndexOffsetTop = null;
              var draggedTagWidth = select(this).node().offsetWidth;

              if (field.key === 'destination' || field.key === 'via') {
                // meaning tags are full width
                _container.selectAll('.chip').style('transform', function (d2, index2) {
                  var node = select(this).node();

                  if (index === index2) {
                    return 'translate(' + x + 'px, ' + y + 'px)'; // move the dragged tag up the order
                  } else if (index2 > index && d3_event.y > node.offsetTop) {
                    if (targetIndex === null || index2 > targetIndex) {
                      targetIndex = index2;
                    }

                    return 'translateY(-100%)'; // move the dragged tag down the order
                  } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
                    if (targetIndex === null || index2 < targetIndex) {
                      targetIndex = index2;
                    }

                    return 'translateY(100%)';
                  }

                  return null;
                });
              } else {
                _container.selectAll('.chip').each(function (d2, index2) {
                  var node = select(this).node(); // check the cursor is in the bounding box

                  if (index !== index2 && d3_event.x < node.offsetLeft + node.offsetWidth + 5 && d3_event.x > node.offsetLeft && d3_event.y < node.offsetTop + node.offsetHeight && d3_event.y > node.offsetTop) {
                    targetIndex = index2;
                    targetIndexOffsetTop = node.offsetTop;
                  }
                }).style('transform', function (d2, index2) {
                  var node = select(this).node();

                  if (index === index2) {
                    return 'translate(' + x + 'px, ' + y + 'px)';
                  } // only translate tags in the same row


                  if (node.offsetTop === targetIndexOffsetTop) {
                    if (index2 < index && index2 >= targetIndex) {
                      return 'translateX(' + draggedTagWidth + 'px)';
                    } else if (index2 > index && index2 <= targetIndex) {
                      return 'translateX(-' + draggedTagWidth + 'px)';
                    }
                  }

                  return null;
                });
              }
            }).on('end', function () {
              if (!select(this).classed('dragging')) {
                return;
              }

              var index = selection.nodes().indexOf(this);
              select(this).classed('dragging', false);

              _container.selectAll('.chip').style('transform', null);

              if (typeof targetIndex === 'number') {
                var element = _multiData[index];

                _multiData.splice(index, 1);

                _multiData.splice(targetIndex, 0, element);

                var t = {};

                if (_multiData.length) {
                  t[field.key] = _multiData.map(function (element) {
                    return element.key;
                  }).join(';');
                } else {
                  t[field.key] = undefined;
                }

                dispatch.call('change', this, t);
              }

              dragOrigin = undefined;
              targetIndex = undefined;
            }));
          }

          combo.focus = function () {
            _input.node().focus();
          };

          combo.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;
            _entityIDs = val;
            return combo;
          };

          function combinedEntityExtent() {
            return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
          }

          return utilRebind(combo, dispatch, 'on');
        }

        function uiFieldText(field, context) {
          var dispatch = dispatch$8('change');
          var input = select(null);
          var outlinkButton = select(null);
          var _entityIDs = [];

          var _tags;

          var _phoneFormats = {};

          if (field.type === 'tel') {
            _mainFileFetcher.get('phone_formats').then(function (d) {
              _phoneFormats = d;
              updatePhonePlaceholder();
            })["catch"](function () {
              /* ignore */
            });
          }

          function calcLocked() {
            // Protect certain fields that have a companion `*:wikidata` value
            var isLocked = (field.id === 'brand' || field.id === 'network' || field.id === 'operator' || field.id === 'flag') && _entityIDs.length && _entityIDs.some(function (entityID) {
              var entity = context.graph().hasEntity(entityID);
              if (!entity) return false; // Features linked to Wikidata are likely important and should be protected

              if (entity.tags.wikidata) return true;
              var preset = _mainPresetIndex.match(entity, context.graph());
              var isSuggestion = preset && preset.suggestion; // Lock the field if there is a value and a companion `*:wikidata` value

              var which = field.id; // 'brand', 'network', 'operator', 'flag'

              return isSuggestion && !!entity.tags[which] && !!entity.tags[which + ':wikidata'];
            });

            field.locked(isLocked);
          }

          function i(selection) {
            calcLocked();
            var isLocked = field.locked();
            var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
            wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
            input = wrap.selectAll('input').data([0]);
            input = input.enter().append('input').attr('type', field.type === 'identifier' || field.type === 'roadheight' ? 'text' : field.type).attr('id', field.domId).classed(field.type, true).call(utilNoAuto).merge(input);
            input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());

            if (field.type === 'tel') {
              updatePhonePlaceholder();
            } else if (field.type === 'number') {
              var rtl = _mainLocalizer.textDirection() === 'rtl';
              input.attr('type', 'text');
              var inc = field.increment;
              var buttons = wrap.selectAll('.increment, .decrement').data(rtl ? [inc, -inc] : [-inc, inc]);
              buttons.enter().append('button').attr('class', function (d) {
                var which = d > 0 ? 'increment' : 'decrement';
                return 'form-field-button ' + which;
              }).merge(buttons).on('click', function (d3_event, d) {
                d3_event.preventDefault();
                var raw_vals = input.node().value || '0';
                var vals = raw_vals.split(';');
                vals = vals.map(function (v) {
                  var num = parseFloat(v.trim(), 10);
                  return isFinite(num) ? clamped(num + d) : v.trim();
                });
                input.node().value = vals.join(';');
                change()();
              });
            } else if (field.type === 'identifier' && field.urlFormat && field.pattern) {
              input.attr('type', 'text');
              outlinkButton = wrap.selectAll('.foreign-id-permalink').data([0]);
              outlinkButton.enter().append('button').call(svgIcon('#iD-icon-out-link')).attr('class', 'form-field-button foreign-id-permalink').attr('title', function () {
                var domainResults = /^https?:\/\/(.{1,}?)\//.exec(field.urlFormat);

                if (domainResults.length >= 2 && domainResults[1]) {
                  var domain = domainResults[1];
                  return _t('icons.view_on', {
                    domain: domain
                  });
                }

                return '';
              }).on('click', function (d3_event) {
                d3_event.preventDefault();
                var value = validIdentifierValueForLink();

                if (value) {
                  var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
                  window.open(url, '_blank');
                }
              }).merge(outlinkButton);
            }
          }

          function updatePhonePlaceholder() {
            if (input.empty() || !Object.keys(_phoneFormats).length) return;
            var extent = combinedEntityExtent();
            var countryCode = extent && iso1A2Code(extent.center());

            var format = countryCode && _phoneFormats[countryCode.toLowerCase()];

            if (format) input.attr('placeholder', format);
          }

          function validIdentifierValueForLink() {
            if (field.type === 'identifier' && field.pattern) {
              var value = utilGetSetValue(input).trim().split(';')[0];
              return value && value.match(new RegExp(field.pattern));
            }

            return null;
          } // clamp number to min/max


          function clamped(num) {
            if (field.minValue !== undefined) {
              num = Math.max(num, field.minValue);
            }

            if (field.maxValue !== undefined) {
              num = Math.min(num, field.maxValue);
            }

            return num;
          }

          function change(onInput) {
            return function () {
              var t = {};
              var val = utilGetSetValue(input);
              if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string

              if (!val && Array.isArray(_tags[field.key])) return;

              if (!onInput) {
                if (field.type === 'number' && val) {
                  var vals = val.split(';');
                  vals = vals.map(function (v) {
                    var num = parseFloat(v.trim(), 10);
                    return isFinite(num) ? clamped(num) : v.trim();
                  });
                  val = vals.join(';');
                }

                utilGetSetValue(input, val);
              }

              t[field.key] = val || undefined;
              dispatch.call('change', this, t, onInput);
            };
          }

          i.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;
            _entityIDs = val;
            return i;
          };

          i.tags = function (tags) {
            _tags = tags;
            var isMixed = Array.isArray(tags[field.key]);
            utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder() || _t('inspector.unknown')).classed('mixed', isMixed);

            if (outlinkButton && !outlinkButton.empty()) {
              var disabled = !validIdentifierValueForLink();
              outlinkButton.classed('disabled', disabled);
            }
          };

          i.focus = function () {
            var node = input.node();
            if (node) node.focus();
          };

          function combinedEntityExtent() {
            return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
          }

          return utilRebind(i, dispatch, 'on');
        }

        function uiFieldAccess(field, context) {
          var dispatch = dispatch$8('change');
          var items = select(null);

          var _tags;

          function access(selection) {
            var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
            wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
            var list = wrap.selectAll('ul').data([0]);
            list = list.enter().append('ul').attr('class', 'rows').merge(list);
            items = list.selectAll('li').data(field.keys); // Enter

            var enter = items.enter().append('li').attr('class', function (d) {
              return 'labeled-input preset-access-' + d;
            });
            enter.append('span').attr('class', 'label preset-label-access').attr('for', function (d) {
              return 'preset-input-access-' + d;
            }).html(function (d) {
              return field.t.html('types.' + d);
            });
            enter.append('div').attr('class', 'preset-input-access-wrap').append('input').attr('type', 'text').attr('class', function (d) {
              return 'preset-input-access preset-input-access-' + d;
            }).call(utilNoAuto).each(function (d) {
              select(this).call(uiCombobox(context, 'access-' + d).data(access.options(d)));
            }); // Update

            items = items.merge(enter);
            wrap.selectAll('.preset-input-access').on('change', change).on('blur', change);
          }

          function change(d3_event, d) {
            var tag = {};
            var value = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string

            if (!value && typeof _tags[d] !== 'string') return;
            tag[d] = value || undefined;
            dispatch.call('change', this, tag);
          }

          access.options = function (type) {
            var options = ['no', 'permissive', 'private', 'permit', 'destination'];

            if (type !== 'access') {
              options.unshift('yes');
              options.push('designated');

              if (type === 'bicycle') {
                options.push('dismount');
              }
            }

            return options.map(function (option) {
              return {
                title: field.t('options.' + option + '.description'),
                value: option
              };
            });
          };

          var placeholdersByHighway = {
            footway: {
              foot: 'designated',
              motor_vehicle: 'no'
            },
            steps: {
              foot: 'yes',
              motor_vehicle: 'no',
              bicycle: 'no',
              horse: 'no'
            },
            pedestrian: {
              foot: 'yes',
              motor_vehicle: 'no'
            },
            cycleway: {
              motor_vehicle: 'no',
              bicycle: 'designated'
            },
            bridleway: {
              motor_vehicle: 'no',
              horse: 'designated'
            },
            path: {
              foot: 'yes',
              motor_vehicle: 'no',
              bicycle: 'yes',
              horse: 'yes'
            },
            motorway: {
              foot: 'no',
              motor_vehicle: 'yes',
              bicycle: 'no',
              horse: 'no'
            },
            trunk: {
              motor_vehicle: 'yes'
            },
            primary: {
              foot: 'yes',
              motor_vehicle: 'yes',
              bicycle: 'yes',
              horse: 'yes'
            },
            secondary: {
              foot: 'yes',
              motor_vehicle: 'yes',
              bicycle: 'yes',
              horse: 'yes'
            },
            tertiary: {
              foot: 'yes',
              motor_vehicle: 'yes',
              bicycle: 'yes',
              horse: 'yes'
            },
            residential: {
              foot: 'yes',
              motor_vehicle: 'yes',
              bicycle: 'yes',
              horse: 'yes'
            },
            unclassified: {
              foot: 'yes',
              motor_vehicle: 'yes',
              bicycle: 'yes',
              horse: 'yes'
            },
            service: {
              foot: 'yes',
              motor_vehicle: 'yes',
              bicycle: 'yes',
              horse: 'yes'
            },
            motorway_link: {
              foot: 'no',
              motor_vehicle: 'yes',
              bicycle: 'no',
              horse: 'no'
            },
            trunk_link: {
              motor_vehicle: 'yes'
            },
            primary_link: {
              foot: 'yes',
              motor_vehicle: 'yes',
              bicycle: 'yes',
              horse: 'yes'
            },
            secondary_link: {
              foot: 'yes',
              motor_vehicle: 'yes',
              bicycle: 'yes',
              horse: 'yes'
            },
            tertiary_link: {
              foot: 'yes',
              motor_vehicle: 'yes',
              bicycle: 'yes',
              horse: 'yes'
            }
          };

          access.tags = function (tags) {
            _tags = tags;
            utilGetSetValue(items.selectAll('.preset-input-access'), function (d) {
              return typeof tags[d] === 'string' ? tags[d] : '';
            }).classed('mixed', function (d) {
              return tags[d] && Array.isArray(tags[d]);
            }).attr('title', function (d) {
              return tags[d] && Array.isArray(tags[d]) && tags[d].filter(Boolean).join('\n');
            }).attr('placeholder', function (d) {
              if (tags[d] && Array.isArray(tags[d])) {
                return _t('inspector.multiple_values');
              }

              if (d === 'access') {
                return 'yes';
              }

              if (tags.access && typeof tags.access === 'string') {
                return tags.access;
              }

              if (tags.highway) {
                if (typeof tags.highway === 'string') {
                  if (placeholdersByHighway[tags.highway] && placeholdersByHighway[tags.highway][d]) {
                    return placeholdersByHighway[tags.highway][d];
                  }
                } else {
                  var impliedAccesses = tags.highway.filter(Boolean).map(function (highwayVal) {
                    return placeholdersByHighway[highwayVal] && placeholdersByHighway[highwayVal][d];
                  }).filter(Boolean);

                  if (impliedAccesses.length === tags.highway.length && new Set(impliedAccesses).size === 1) {
                    // if all the highway values have the same implied access for this type then use that
                    return impliedAccesses[0];
                  }
                }
              }

              return field.placeholder();
            });
          };

          access.focus = function () {
            items.selectAll('.preset-input-access').node().focus();
          };

          return utilRebind(access, dispatch, 'on');
        }

        function uiFieldAddress(field, context) {
          var dispatch = dispatch$8('change');

          var _selection = select(null);

          var _wrap = select(null);

          var addrField = _mainPresetIndex.field('address'); // needed for placeholder strings

          var _entityIDs = [];

          var _tags;

          var _countryCode;

          var _addressFormats = [{
            format: [['housenumber', 'street'], ['city', 'postcode']]
          }];
          _mainFileFetcher.get('address_formats').then(function (d) {
            _addressFormats = d;

            if (!_selection.empty()) {
              _selection.call(address);
            }
          })["catch"](function () {
            /* ignore */
          });

          function getNearStreets() {
            var extent = combinedEntityExtent();
            var l = extent.center();
            var box = geoExtent(l).padByMeters(200);
            var streets = context.history().intersects(box).filter(isAddressable).map(function (d) {
              var loc = context.projection([(extent[0][0] + extent[1][0]) / 2, (extent[0][1] + extent[1][1]) / 2]);
              var choice = geoChooseEdge(context.graph().childNodes(d), loc, context.projection);
              return {
                title: d.tags.name,
                value: d.tags.name,
                dist: choice.distance
              };
            }).sort(function (a, b) {
              return a.dist - b.dist;
            });
            return utilArrayUniqBy(streets, 'value');

            function isAddressable(d) {
              return d.tags.highway && d.tags.name && d.type === 'way';
            }
          }

          function getNearCities() {
            var extent = combinedEntityExtent();
            var l = extent.center();
            var box = geoExtent(l).padByMeters(200);
            var cities = context.history().intersects(box).filter(isAddressable).map(function (d) {
              return {
                title: d.tags['addr:city'] || d.tags.name,
                value: d.tags['addr:city'] || d.tags.name,
                dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
              };
            }).sort(function (a, b) {
              return a.dist - b.dist;
            });
            return utilArrayUniqBy(cities, 'value');

            function isAddressable(d) {
              if (d.tags.name) {
                if (d.tags.admin_level === '8' && d.tags.boundary === 'administrative') return true;
                if (d.tags.border_type === 'city') return true;
                if (d.tags.place === 'city' || d.tags.place === 'town' || d.tags.place === 'village') return true;
              }

              if (d.tags['addr:city']) return true;
              return false;
            }
          }

          function getNearValues(key) {
            var extent = combinedEntityExtent();
            var l = extent.center();
            var box = geoExtent(l).padByMeters(200);
            var results = context.history().intersects(box).filter(function hasTag(d) {
              return _entityIDs.indexOf(d.id) === -1 && d.tags[key];
            }).map(function (d) {
              return {
                title: d.tags[key],
                value: d.tags[key],
                dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
              };
            }).sort(function (a, b) {
              return a.dist - b.dist;
            });
            return utilArrayUniqBy(results, 'value');
          }

          function updateForCountryCode() {
            if (!_countryCode) return;
            var addressFormat;

            for (var i = 0; i < _addressFormats.length; i++) {
              var format = _addressFormats[i];

              if (!format.countryCodes) {
                addressFormat = format; // choose the default format, keep going
              } else if (format.countryCodes.indexOf(_countryCode) !== -1) {
                addressFormat = format; // choose the country format, stop here

                break;
              }
            }

            var dropdowns = addressFormat.dropdowns || ['city', 'county', 'country', 'district', 'hamlet', 'neighbourhood', 'place', 'postcode', 'province', 'quarter', 'state', 'street', 'subdistrict', 'suburb'];
            var widths = addressFormat.widths || {
              housenumber: 1 / 3,
              street: 2 / 3,
              city: 2 / 3,
              state: 1 / 4,
              postcode: 1 / 3
            };

            function row(r) {
              // Normalize widths.
              var total = r.reduce(function (sum, key) {
                return sum + (widths[key] || 0.5);
              }, 0);
              return r.map(function (key) {
                return {
                  id: key,
                  width: (widths[key] || 0.5) / total
                };
              });
            }

            var rows = _wrap.selectAll('.addr-row').data(addressFormat.format, function (d) {
              return d.toString();
            });

            rows.exit().remove();
            rows.enter().append('div').attr('class', 'addr-row').selectAll('input').data(row).enter().append('input').property('type', 'text').call(updatePlaceholder).attr('class', function (d) {
              return 'addr-' + d.id;
            }).call(utilNoAuto).each(addDropdown).style('width', function (d) {
              return d.width * 100 + '%';
            });

            function addDropdown(d) {
              if (dropdowns.indexOf(d.id) === -1) return; // not a dropdown

              var nearValues = d.id === 'street' ? getNearStreets : d.id === 'city' ? getNearCities : getNearValues;
              select(this).call(uiCombobox(context, 'address-' + d.id).minItems(1).caseSensitive(true).fetcher(function (value, callback) {
                callback(nearValues('addr:' + d.id));
              }));
            }

            _wrap.selectAll('input').on('blur', change()).on('change', change());

            _wrap.selectAll('input:not(.combobox-input)').on('input', change(true));

            if (_tags) updateTags(_tags);
          }

          function address(selection) {
            _selection = selection;
            _wrap = selection.selectAll('.form-field-input-wrap').data([0]);
            _wrap = _wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(_wrap);
            var extent = combinedEntityExtent();

            if (extent) {
              var countryCode;

              if (context.inIntro()) {
                // localize the address format for the walkthrough
                countryCode = _t('intro.graph.countrycode');
              } else {
                var center = extent.center();
                countryCode = iso1A2Code(center);
              }

              if (countryCode) {
                _countryCode = countryCode.toLowerCase();
                updateForCountryCode();
              }
            }
          }

          function change(onInput) {
            return function () {
              var tags = {};

              _wrap.selectAll('input').each(function (subfield) {
                var key = field.key + ':' + subfield.id;
                var value = this.value;
                if (!onInput) value = context.cleanTagValue(value); // don't override multiple values with blank string

                if (Array.isArray(_tags[key]) && !value) return;
                tags[key] = value || undefined;
              });

              dispatch.call('change', this, tags, onInput);
            };
          }

          function updatePlaceholder(inputSelection) {
            return inputSelection.attr('placeholder', function (subfield) {
              if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
                return _t('inspector.multiple_values');
              }

              if (_countryCode) {
                var localkey = subfield.id + '!' + _countryCode;
                var tkey = addrField.hasTextForStringId('placeholders.' + localkey) ? localkey : subfield.id;
                return addrField.t('placeholders.' + tkey);
              }
            });
          }

          function updateTags(tags) {
            utilGetSetValue(_wrap.selectAll('input'), function (subfield) {
              var val = tags[field.key + ':' + subfield.id];
              return typeof val === 'string' ? val : '';
            }).attr('title', function (subfield) {
              var val = tags[field.key + ':' + subfield.id];
              return val && Array.isArray(val) && val.filter(Boolean).join('\n');
            }).classed('mixed', function (subfield) {
              return Array.isArray(tags[field.key + ':' + subfield.id]);
            }).call(updatePlaceholder);
          }

          function combinedEntityExtent() {
            return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
          }

          address.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;
            _entityIDs = val;
            return address;
          };

          address.tags = function (tags) {
            _tags = tags;
            updateTags(tags);
          };

          address.focus = function () {
            var node = _wrap.selectAll('input').node();

            if (node) node.focus();
          };

          return utilRebind(address, dispatch, 'on');
        }

        function uiFieldCycleway(field, context) {
          var dispatch = dispatch$8('change');
          var items = select(null);
          var wrap = select(null);

          var _tags;

          function cycleway(selection) {
            function stripcolon(s) {
              return s.replace(':', '');
            }

            wrap = selection.selectAll('.form-field-input-wrap').data([0]);
            wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
            var div = wrap.selectAll('ul').data([0]);
            div = div.enter().append('ul').attr('class', 'rows').merge(div);
            var keys = ['cycleway:left', 'cycleway:right'];
            items = div.selectAll('li').data(keys);
            var enter = items.enter().append('li').attr('class', function (d) {
              return 'labeled-input preset-cycleway-' + stripcolon(d);
            });
            enter.append('span').attr('class', 'label preset-label-cycleway').attr('for', function (d) {
              return 'preset-input-cycleway-' + stripcolon(d);
            }).html(function (d) {
              return field.t.html('types.' + d);
            });
            enter.append('div').attr('class', 'preset-input-cycleway-wrap').append('input').attr('type', 'text').attr('class', function (d) {
              return 'preset-input-cycleway preset-input-' + stripcolon(d);
            }).call(utilNoAuto).each(function (d) {
              select(this).call(uiCombobox(context, 'cycleway-' + stripcolon(d)).data(cycleway.options(d)));
            });
            items = items.merge(enter); // Update

            wrap.selectAll('.preset-input-cycleway').on('change', change).on('blur', change);
          }

          function change(d3_event, key) {
            var newValue = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string

            if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) return;

            if (newValue === 'none' || newValue === '') {
              newValue = undefined;
            }

            var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
            var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];

            if (otherValue && Array.isArray(otherValue)) {
              // we must always have an explicit value for comparison
              otherValue = otherValue[0];
            }

            if (otherValue === 'none' || otherValue === '') {
              otherValue = undefined;
            }

            var tag = {}; // If the left and right tags match, use the cycleway tag to tag both
            // sides the same way

            if (newValue === otherValue) {
              tag = {
                cycleway: newValue,
                'cycleway:left': undefined,
                'cycleway:right': undefined
              };
            } else {
              // Always set both left and right as changing one can affect the other
              tag = {
                cycleway: undefined
              };
              tag[key] = newValue;
              tag[otherKey] = otherValue;
            }

            dispatch.call('change', this, tag);
          }

          cycleway.options = function () {
            return field.options.map(function (option) {
              return {
                title: field.t('options.' + option + '.description'),
                value: option
              };
            });
          };

          cycleway.tags = function (tags) {
            _tags = tags; // If cycleway is set, use that instead of individual values

            var commonValue = typeof tags.cycleway === 'string' && tags.cycleway;
            utilGetSetValue(items.selectAll('.preset-input-cycleway'), function (d) {
              if (commonValue) return commonValue;
              return !tags.cycleway && typeof tags[d] === 'string' ? tags[d] : '';
            }).attr('title', function (d) {
              if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
                var vals = [];

                if (Array.isArray(tags.cycleway)) {
                  vals = vals.concat(tags.cycleway);
                }

                if (Array.isArray(tags[d])) {
                  vals = vals.concat(tags[d]);
                }

                return vals.filter(Boolean).join('\n');
              }

              return null;
            }).attr('placeholder', function (d) {
              if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
                return _t('inspector.multiple_values');
              }

              return field.placeholder();
            }).classed('mixed', function (d) {
              return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
            });
          };

          cycleway.focus = function () {
            var node = wrap.selectAll('input').node();
            if (node) node.focus();
          };

          return utilRebind(cycleway, dispatch, 'on');
        }

        function uiFieldLanes(field, context) {
          var dispatch = dispatch$8('change');
          var LANE_WIDTH = 40;
          var LANE_HEIGHT = 200;
          var _entityIDs = [];

          function lanes(selection) {
            var lanesData = context.entity(_entityIDs[0]).lanes();

            if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
              selection.call(lanes.off);
              return;
            }

            var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
            wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
            var surface = wrap.selectAll('.surface').data([0]);
            var d = utilGetDimensions(wrap);
            var freeSpace = d[0] - lanesData.lanes.length * LANE_WIDTH * 1.5 + LANE_WIDTH * 0.5;
            surface = surface.enter().append('svg').attr('width', d[0]).attr('height', 300).attr('class', 'surface').merge(surface);
            var lanesSelection = surface.selectAll('.lanes').data([0]);
            lanesSelection = lanesSelection.enter().append('g').attr('class', 'lanes').merge(lanesSelection);
            lanesSelection.attr('transform', function () {
              return 'translate(' + freeSpace / 2 + ', 0)';
            });
            var lane = lanesSelection.selectAll('.lane').data(lanesData.lanes);
            lane.exit().remove();
            var enter = lane.enter().append('g').attr('class', 'lane');
            enter.append('g').append('rect').attr('y', 50).attr('width', LANE_WIDTH).attr('height', LANE_HEIGHT);
            enter.append('g').attr('class', 'forward').append('text').attr('y', 40).attr('x', 14).html('▲');
            enter.append('g').attr('class', 'bothways').append('text').attr('y', 40).attr('x', 14).html('▲▼');
            enter.append('g').attr('class', 'backward').append('text').attr('y', 40).attr('x', 14).html('▼');
            lane = lane.merge(enter);
            lane.attr('transform', function (d) {
              return 'translate(' + LANE_WIDTH * d.index * 1.5 + ', 0)';
            });
            lane.select('.forward').style('visibility', function (d) {
              return d.direction === 'forward' ? 'visible' : 'hidden';
            });
            lane.select('.bothways').style('visibility', function (d) {
              return d.direction === 'bothways' ? 'visible' : 'hidden';
            });
            lane.select('.backward').style('visibility', function (d) {
              return d.direction === 'backward' ? 'visible' : 'hidden';
            });
          }

          lanes.entityIDs = function (val) {
            _entityIDs = val;
          };

          lanes.tags = function () {};

          lanes.focus = function () {};

          lanes.off = function () {};

          return utilRebind(lanes, dispatch, 'on');
        }
        uiFieldLanes.supportsMultiselection = false;

        var _languagesArray = [];
        function uiFieldLocalized(field, context) {
          var dispatch = dispatch$8('change', 'input');
          var wikipedia = services.wikipedia;
          var input = select(null);
          var localizedInputs = select(null);

          var _countryCode;

          var _tags; // A concern here in switching to async data means that _languagesArray will not
          // be available the first time through, so things like the fetchers and
          // the language() function will not work immediately.


          _mainFileFetcher.get('languages').then(loadLanguagesArray)["catch"](function () {
            /* ignore */
          });
          var _territoryLanguages = {};
          _mainFileFetcher.get('territory_languages').then(function (d) {
            _territoryLanguages = d;
          })["catch"](function () {
            /* ignore */
          }); // reuse these combos

          var langCombo = uiCombobox(context, 'localized-lang').fetcher(fetchLanguages).minItems(0);

          var _selection = select(null);

          var _multilingual = [];

          var _buttonTip = uiTooltip().title(_t.html('translate.translate')).placement('left');

          var _wikiTitles;

          var _entityIDs = [];

          function loadLanguagesArray(dataLanguages) {
            if (_languagesArray.length !== 0) return; // some conversion is needed to ensure correct OSM tags are used

            var replacements = {
              sr: 'sr-Cyrl',
              // in OSM, `sr` implies Cyrillic
              'sr-Cyrl': false // `sr-Cyrl` isn't used in OSM

            };

            for (var code in dataLanguages) {
              if (replacements[code] === false) continue;
              var metaCode = code;
              if (replacements[code]) metaCode = replacements[code];

              _languagesArray.push({
                localName: _mainLocalizer.languageName(metaCode, {
                  localOnly: true
                }),
                nativeName: dataLanguages[metaCode].nativeName,
                code: code,
                label: _mainLocalizer.languageName(metaCode)
              });
            }
          }

          function calcLocked() {
            // Protect name field for suggestion presets that don't display a brand/operator field
            var isLocked = field.id === 'name' && _entityIDs.length && _entityIDs.some(function (entityID) {
              var entity = context.graph().hasEntity(entityID);
              if (!entity) return false; // Features linked to Wikidata are likely important and should be protected

              if (entity.tags.wikidata) return true; // Assume the name has already been confirmed if its source has been researched

              if (entity.tags['name:etymology:wikidata']) return true; // Lock the `name` if this is a suggestion preset that assigns the name,
              // and the preset does not display a `brand` or `operator` field.
              // (For presets like hotels, car dealerships, post offices, the `name` should remain editable)
              // see also similar logic in `outdated_tags.js`

              var preset = _mainPresetIndex.match(entity, context.graph());

              if (preset) {
                var isSuggestion = preset.suggestion;
                var fields = preset.fields();
                var showsBrandField = fields.some(function (d) {
                  return d.id === 'brand';
                });
                var showsOperatorField = fields.some(function (d) {
                  return d.id === 'operator';
                });
                var setsName = preset.addTags.name;
                var setsBrandWikidata = preset.addTags['brand:wikidata'];
                var setsOperatorWikidata = preset.addTags['operator:wikidata'];
                return isSuggestion && setsName && (setsBrandWikidata && !showsBrandField || setsOperatorWikidata && !showsOperatorField);
              }

              return false;
            });

            field.locked(isLocked);
          } // update _multilingual, maintaining the existing order


          function calcMultilingual(tags) {
            var existingLangsOrdered = _multilingual.map(function (item) {
              return item.lang;
            });

            var existingLangs = new Set(existingLangsOrdered.filter(Boolean));

            for (var k in tags) {
              var m = k.match(/^(.*):(.*)$/);

              if (m && m[1] === field.key && m[2]) {
                var item = {
                  lang: m[2],
                  value: tags[k]
                };

                if (existingLangs.has(item.lang)) {
                  // update the value
                  _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
                  existingLangs["delete"](item.lang);
                } else {
                  _multilingual.push(item);
                }
              }
            } // Don't remove items based on deleted tags, since this makes the UI
            // disappear unexpectedly when clearing values - #8164


            _multilingual.forEach(function (item) {
              if (item.lang && existingLangs.has(item.lang)) {
                item.value = '';
              }
            });
          }

          function localized(selection) {
            _selection = selection;
            calcLocked();
            var isLocked = field.locked();
            var wrap = selection.selectAll('.form-field-input-wrap').data([0]); // enter/update

            wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
            input = wrap.selectAll('.localized-main').data([0]); // enter/update

            input = input.enter().append('input').attr('type', 'text').attr('id', field.domId).attr('class', 'localized-main').call(utilNoAuto).merge(input);
            input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());
            var translateButton = wrap.selectAll('.localized-add').data([0]);
            translateButton = translateButton.enter().append('button').attr('class', 'localized-add form-field-button').call(svgIcon('#iD-icon-plus')).merge(translateButton);
            translateButton.classed('disabled', !!isLocked).call(isLocked ? _buttonTip.destroy : _buttonTip).on('click', addNew);

            if (_tags && !_multilingual.length) {
              calcMultilingual(_tags);
            }

            localizedInputs = selection.selectAll('.localized-multilingual').data([0]);
            localizedInputs = localizedInputs.enter().append('div').attr('class', 'localized-multilingual').merge(localizedInputs);
            localizedInputs.call(renderMultilingual);
            localizedInputs.selectAll('button, input').classed('disabled', !!isLocked).attr('readonly', isLocked || null);

            function addNew(d3_event) {
              d3_event.preventDefault();
              if (field.locked()) return;
              var defaultLang = _mainLocalizer.languageCode().toLowerCase();

              var langExists = _multilingual.find(function (datum) {
                return datum.lang === defaultLang;
              });

              var isLangEn = defaultLang.indexOf('en') > -1;

              if (isLangEn || langExists) {
                defaultLang = '';
                langExists = _multilingual.find(function (datum) {
                  return datum.lang === defaultLang;
                });
              }

              if (!langExists) {
                // prepend the value so it appears at the top
                _multilingual.unshift({
                  lang: defaultLang,
                  value: ''
                });

                localizedInputs.call(renderMultilingual);
              }
            }

            function change(onInput) {
              return function (d3_event) {
                if (field.locked()) {
                  d3_event.preventDefault();
                  return;
                }

                var val = utilGetSetValue(select(this));
                if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string

                if (!val && Array.isArray(_tags[field.key])) return;
                var t = {};
                t[field.key] = val || undefined;
                dispatch.call('change', this, t, onInput);
              };
            }
          }

          function key(lang) {
            return field.key + ':' + lang;
          }

          function changeLang(d3_event, d) {
            var tags = {}; // make sure unrecognized suffixes are lowercase - #7156

            var lang = utilGetSetValue(select(this)).toLowerCase();

            var language = _languagesArray.find(function (d) {
              return d.label.toLowerCase() === lang || d.localName && d.localName.toLowerCase() === lang || d.nativeName && d.nativeName.toLowerCase() === lang;
            });

            if (language) lang = language.code;

            if (d.lang && d.lang !== lang) {
              tags[key(d.lang)] = undefined;
            }

            var newKey = lang && context.cleanTagKey(key(lang));
            var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));

            if (newKey && value) {
              tags[newKey] = value;
            } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
              tags[newKey] = _wikiTitles[d.lang];
            }

            d.lang = lang;
            dispatch.call('change', this, tags);
          }

          function changeValue(d3_event, d) {
            if (!d.lang) return;
            var value = context.cleanTagValue(utilGetSetValue(select(this))) || undefined; // don't override multiple values with blank string

            if (!value && Array.isArray(d.value)) return;
            var t = {};
            t[key(d.lang)] = value;
            d.value = value;
            dispatch.call('change', this, t);
          }

          function fetchLanguages(value, cb) {
            var v = value.toLowerCase(); // show the user's language first

            var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];

            if (_countryCode && _territoryLanguages[_countryCode]) {
              langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
            }

            var langItems = [];
            langCodes.forEach(function (code) {
              var langItem = _languagesArray.find(function (item) {
                return item.code === code;
              });

              if (langItem) langItems.push(langItem);
            });
            langItems = utilArrayUniq(langItems.concat(_languagesArray));
            cb(langItems.filter(function (d) {
              return d.label.toLowerCase().indexOf(v) >= 0 || d.localName && d.localName.toLowerCase().indexOf(v) >= 0 || d.nativeName && d.nativeName.toLowerCase().indexOf(v) >= 0 || d.code.toLowerCase().indexOf(v) >= 0;
            }).map(function (d) {
              return {
                value: d.label
              };
            }));
          }

          function renderMultilingual(selection) {
            var entries = selection.selectAll('div.entry').data(_multilingual, function (d) {
              return d.lang;
            });
            entries.exit().style('top', '0').style('max-height', '240px').transition().duration(200).style('opacity', '0').style('max-height', '0px').remove();
            var entriesEnter = entries.enter().append('div').attr('class', 'entry').each(function (_, index) {
              var wrap = select(this);
              var domId = utilUniqueDomId(index);
              var label = wrap.append('label').attr('class', 'field-label').attr('for', domId);
              var text = label.append('span').attr('class', 'label-text');
              text.append('span').attr('class', 'label-textvalue').html(_t.html('translate.localized_translation_label'));
              text.append('span').attr('class', 'label-textannotation');
              label.append('button').attr('class', 'remove-icon-multilingual').on('click', function (d3_event, d) {
                if (field.locked()) return;
                d3_event.preventDefault(); // remove the UI item manually

                _multilingual.splice(_multilingual.indexOf(d), 1);

                var langKey = d.lang && key(d.lang);

                if (langKey && langKey in _tags) {
                  delete _tags[langKey]; // remove from entity tags

                  var t = {};
                  t[langKey] = undefined;
                  dispatch.call('change', this, t);
                  return;
                }

                renderMultilingual(selection);
              }).call(svgIcon('#iD-operation-delete'));
              wrap.append('input').attr('class', 'localized-lang').attr('id', domId).attr('type', 'text').attr('placeholder', _t('translate.localized_translation_language')).on('blur', changeLang).on('change', changeLang).call(langCombo);
              wrap.append('input').attr('type', 'text').attr('class', 'localized-value').on('blur', changeValue).on('change', changeValue);
            });
            entriesEnter.style('margin-top', '0px').style('max-height', '0px').style('opacity', '0').transition().duration(200).style('margin-top', '10px').style('max-height', '240px').style('opacity', '1').on('end', function () {
              select(this).style('max-height', '').style('overflow', 'visible');
            });
            entries = entries.merge(entriesEnter);
            entries.order(); // allow removing the entry UIs even if there isn't a tag to remove

            entries.classed('present', true);
            utilGetSetValue(entries.select('.localized-lang'), function (d) {
              var langItem = _languagesArray.find(function (item) {
                return item.code === d.lang;
              });

              if (langItem) return langItem.label;
              return d.lang;
            });
            utilGetSetValue(entries.select('.localized-value'), function (d) {
              return typeof d.value === 'string' ? d.value : '';
            }).attr('title', function (d) {
              return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : null;
            }).attr('placeholder', function (d) {
              return Array.isArray(d.value) ? _t('inspector.multiple_values') : _t('translate.localized_translation_name');
            }).classed('mixed', function (d) {
              return Array.isArray(d.value);
            });
          }

          localized.tags = function (tags) {
            _tags = tags; // Fetch translations from wikipedia

            if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
              _wikiTitles = {};
              var wm = tags.wikipedia.match(/([^:]+):(.+)/);

              if (wm && wm[0] && wm[1]) {
                wikipedia.translations(wm[1], wm[2], function (err, d) {
                  if (err || !d) return;
                  _wikiTitles = d;
                });
              }
            }

            var isMixed = Array.isArray(tags[field.key]);
            utilGetSetValue(input, typeof tags[field.key] === 'string' ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder()).classed('mixed', isMixed);
            calcMultilingual(tags);

            _selection.call(localized);
          };

          localized.focus = function () {
            input.node().focus();
          };

          localized.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;
            _entityIDs = val;
            _multilingual = [];
            loadCountryCode();
            return localized;
          };

          function loadCountryCode() {
            var extent = combinedEntityExtent();
            var countryCode = extent && iso1A2Code(extent.center());
            _countryCode = countryCode && countryCode.toLowerCase();
          }

          function combinedEntityExtent() {
            return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
          }

          return utilRebind(localized, dispatch, 'on');
        }

        function uiFieldRoadspeed(field, context) {
          var dispatch = dispatch$8('change');
          var unitInput = select(null);
          var input = select(null);
          var _entityIDs = [];

          var _tags;

          var _isImperial;

          var speedCombo = uiCombobox(context, 'roadspeed');
          var unitCombo = uiCombobox(context, 'roadspeed-unit').data(['km/h', 'mph'].map(comboValues));
          var metricValues = [20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120];
          var imperialValues = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80];

          function roadspeed(selection) {
            var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
            wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
            input = wrap.selectAll('input.roadspeed-number').data([0]);
            input = input.enter().append('input').attr('type', 'text').attr('class', 'roadspeed-number').attr('id', field.domId).call(utilNoAuto).call(speedCombo).merge(input);
            input.on('change', change).on('blur', change);
            var loc = combinedEntityExtent().center();
            _isImperial = roadSpeedUnit(loc) === 'mph';
            unitInput = wrap.selectAll('input.roadspeed-unit').data([0]);
            unitInput = unitInput.enter().append('input').attr('type', 'text').attr('class', 'roadspeed-unit').call(unitCombo).merge(unitInput);
            unitInput.on('blur', changeUnits).on('change', changeUnits);

            function changeUnits() {
              _isImperial = utilGetSetValue(unitInput) === 'mph';
              utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
              setUnitSuggestions();
              change();
            }
          }

          function setUnitSuggestions() {
            speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
            utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
          }

          function comboValues(d) {
            return {
              value: d.toString(),
              title: d.toString()
            };
          }

          function change() {
            var tag = {};
            var value = utilGetSetValue(input).trim(); // don't override multiple values with blank string

            if (!value && Array.isArray(_tags[field.key])) return;

            if (!value) {
              tag[field.key] = undefined;
            } else if (isNaN(value) || !_isImperial) {
              tag[field.key] = context.cleanTagValue(value);
            } else {
              tag[field.key] = context.cleanTagValue(value + ' mph');
            }

            dispatch.call('change', this, tag);
          }

          roadspeed.tags = function (tags) {
            _tags = tags;
            var value = tags[field.key];
            var isMixed = Array.isArray(value);

            if (!isMixed) {
              if (value && value.indexOf('mph') >= 0) {
                value = parseInt(value, 10).toString();
                _isImperial = true;
              } else if (value) {
                _isImperial = false;
              }
            }

            setUnitSuggestions();
            utilGetSetValue(input, typeof value === 'string' ? value : '').attr('title', isMixed ? value.filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder()).classed('mixed', isMixed);
          };

          roadspeed.focus = function () {
            input.node().focus();
          };

          roadspeed.entityIDs = function (val) {
            _entityIDs = val;
          };

          function combinedEntityExtent() {
            return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
          }

          return utilRebind(roadspeed, dispatch, 'on');
        }

        function uiFieldRadio(field, context) {
          var dispatch = dispatch$8('change');
          var placeholder = select(null);
          var wrap = select(null);
          var labels = select(null);
          var radios = select(null);
          var radioData = (field.options || field.keys).slice(); // shallow copy

          var typeField;
          var layerField;
          var _oldType = {};
          var _entityIDs = [];

          function selectedKey() {
            var node = wrap.selectAll('.form-field-input-radio label.active input');
            return !node.empty() && node.datum();
          }

          function radio(selection) {
            selection.classed('preset-radio', true);
            wrap = selection.selectAll('.form-field-input-wrap').data([0]);
            var enter = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-radio');
            enter.append('span').attr('class', 'placeholder');
            wrap = wrap.merge(enter);
            placeholder = wrap.selectAll('.placeholder');
            labels = wrap.selectAll('label').data(radioData);
            enter = labels.enter().append('label');
            enter.append('input').attr('type', 'radio').attr('name', field.id).attr('value', function (d) {
              return field.t('options.' + d, {
                'default': d
              });
            }).attr('checked', false);
            enter.append('span').html(function (d) {
              return field.t.html('options.' + d, {
                'default': d
              });
            });
            labels = labels.merge(enter);
            radios = labels.selectAll('input').on('change', changeRadio);
          }

          function structureExtras(selection, tags) {
            var selected = selectedKey() || tags.layer !== undefined;
            var type = _mainPresetIndex.field(selected);
            var layer = _mainPresetIndex.field('layer');
            var showLayer = selected === 'bridge' || selected === 'tunnel' || tags.layer !== undefined;
            var extrasWrap = selection.selectAll('.structure-extras-wrap').data(selected ? [0] : []);
            extrasWrap.exit().remove();
            extrasWrap = extrasWrap.enter().append('div').attr('class', 'structure-extras-wrap').merge(extrasWrap);
            var list = extrasWrap.selectAll('ul').data([0]);
            list = list.enter().append('ul').attr('class', 'rows').merge(list); // Type

            if (type) {
              if (!typeField || typeField.id !== selected) {
                typeField = uiField(context, type, _entityIDs, {
                  wrap: false
                }).on('change', changeType);
              }

              typeField.tags(tags);
            } else {
              typeField = null;
            }

            var typeItem = list.selectAll('.structure-type-item').data(typeField ? [typeField] : [], function (d) {
              return d.id;
            }); // Exit

            typeItem.exit().remove(); // Enter

            var typeEnter = typeItem.enter().insert('li', ':first-child').attr('class', 'labeled-input structure-type-item');
            typeEnter.append('span').attr('class', 'label structure-label-type').attr('for', 'preset-input-' + selected).html(_t.html('inspector.radio.structure.type'));
            typeEnter.append('div').attr('class', 'structure-input-type-wrap'); // Update

            typeItem = typeItem.merge(typeEnter);

            if (typeField) {
              typeItem.selectAll('.structure-input-type-wrap').call(typeField.render);
            } // Layer


            if (layer && showLayer) {
              if (!layerField) {
                layerField = uiField(context, layer, _entityIDs, {
                  wrap: false
                }).on('change', changeLayer);
              }

              layerField.tags(tags);
              field.keys = utilArrayUnion(field.keys, ['layer']);
            } else {
              layerField = null;
              field.keys = field.keys.filter(function (k) {
                return k !== 'layer';
              });
            }

            var layerItem = list.selectAll('.structure-layer-item').data(layerField ? [layerField] : []); // Exit

            layerItem.exit().remove(); // Enter

            var layerEnter = layerItem.enter().append('li').attr('class', 'labeled-input structure-layer-item');
            layerEnter.append('span').attr('class', 'label structure-label-layer').attr('for', 'preset-input-layer').html(_t.html('inspector.radio.structure.layer'));
            layerEnter.append('div').attr('class', 'structure-input-layer-wrap'); // Update

            layerItem = layerItem.merge(layerEnter);

            if (layerField) {
              layerItem.selectAll('.structure-input-layer-wrap').call(layerField.render);
            }
          }

          function changeType(t, onInput) {
            var key = selectedKey();
            if (!key) return;
            var val = t[key];

            if (val !== 'no') {
              _oldType[key] = val;
            }

            if (field.type === 'structureRadio') {
              // remove layer if it should not be set
              if (val === 'no' || key !== 'bridge' && key !== 'tunnel' || key === 'tunnel' && val === 'building_passage') {
                t.layer = undefined;
              } // add layer if it should be set


              if (t.layer === undefined) {
                if (key === 'bridge' && val !== 'no') {
                  t.layer = '1';
                }

                if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
                  t.layer = '-1';
                }
              }
            }

            dispatch.call('change', this, t, onInput);
          }

          function changeLayer(t, onInput) {
            if (t.layer === '0') {
              t.layer = undefined;
            }

            dispatch.call('change', this, t, onInput);
          }

          function changeRadio() {
            var t = {};
            var activeKey;

            if (field.key) {
              t[field.key] = undefined;
            }

            radios.each(function (d) {
              var active = select(this).property('checked');
              if (active) activeKey = d;

              if (field.key) {
                if (active) t[field.key] = d;
              } else {
                var val = _oldType[activeKey] || 'yes';
                t[d] = active ? val : undefined;
              }
            });

            if (field.type === 'structureRadio') {
              if (activeKey === 'bridge') {
                t.layer = '1';
              } else if (activeKey === 'tunnel' && t.tunnel !== 'building_passage') {
                t.layer = '-1';
              } else {
                t.layer = undefined;
              }
            }

            dispatch.call('change', this, t);
          }

          radio.tags = function (tags) {
            radios.property('checked', function (d) {
              if (field.key) {
                return tags[field.key] === d;
              }

              return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
            });

            function isMixed(d) {
              if (field.key) {
                return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
              }

              return Array.isArray(tags[d]);
            }

            labels.classed('active', function (d) {
              if (field.key) {
                return Array.isArray(tags[field.key]) && tags[field.key].includes(d) || tags[field.key] === d;
              }

              return Array.isArray(tags[d]) || !!(tags[d] && tags[d].toLowerCase() !== 'no');
            }).classed('mixed', isMixed).attr('title', function (d) {
              return isMixed(d) ? _t('inspector.unshared_value_tooltip') : null;
            });
            var selection = radios.filter(function () {
              return this.checked;
            });

            if (selection.empty()) {
              placeholder.html(_t.html('inspector.none'));
            } else {
              placeholder.html(selection.attr('value'));
              _oldType[selection.datum()] = tags[selection.datum()];
            }

            if (field.type === 'structureRadio') {
              // For waterways without a tunnel tag, set 'culvert' as
              // the _oldType to default to if the user picks 'tunnel'
              if (!!tags.waterway && !_oldType.tunnel) {
                _oldType.tunnel = 'culvert';
              }

              wrap.call(structureExtras, tags);
            }
          };

          radio.focus = function () {
            radios.node().focus();
          };

          radio.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;
            _entityIDs = val;
            _oldType = {};
            return radio;
          };

          radio.isAllowed = function () {
            return _entityIDs.length === 1;
          };

          return utilRebind(radio, dispatch, 'on');
        }

        function uiFieldRestrictions(field, context) {
          var dispatch = dispatch$8('change');
          var breathe = behaviorBreathe();
          corePreferences('turn-restriction-via-way', null); // remove old key

          var storedViaWay = corePreferences('turn-restriction-via-way0'); // use new key #6922

          var storedDistance = corePreferences('turn-restriction-distance');

          var _maxViaWay = storedViaWay !== null ? +storedViaWay : 0;

          var _maxDistance = storedDistance ? +storedDistance : 30;

          var _initialized = false;

          var _parent = select(null); // the entire field


          var _container = select(null); // just the map


          var _oldTurns;

          var _graph;

          var _vertexID;

          var _intersection;

          var _fromWayID;

          var _lastXPos;

          function restrictions(selection) {
            _parent = selection; // try to reuse the intersection, but always rebuild it if the graph has changed

            if (_vertexID && (context.graph() !== _graph || !_intersection)) {
              _graph = context.graph();
              _intersection = osmIntersection(_graph, _vertexID, _maxDistance);
            } // It's possible for there to be no actual intersection here.
            // for example, a vertex of two `highway=path`
            // In this case, hide the field.


            var isOK = _intersection && _intersection.vertices.length && // has vertices
            _intersection.vertices // has the vertex that the user selected
            .filter(function (vertex) {
              return vertex.id === _vertexID;
            }).length && _intersection.ways.length > 2 && // has more than 2 ways
            _intersection.ways // has more than 1 TO way
            .filter(function (way) {
              return way.__to;
            }).length > 1; // Also hide in the case where

            select(selection.node().parentNode).classed('hide', !isOK); // if form field is hidden or has detached from dom, clean up.

            if (!isOK || !context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode || !selection.node().parentNode.parentNode) {
              selection.call(restrictions.off);
              return;
            }

            var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
            wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
            var container = wrap.selectAll('.restriction-container').data([0]); // enter

            var containerEnter = container.enter().append('div').attr('class', 'restriction-container');
            containerEnter.append('div').attr('class', 'restriction-help'); // update

            _container = containerEnter.merge(container).call(renderViewer);
            var controls = wrap.selectAll('.restriction-controls').data([0]); // enter/update

            controls.enter().append('div').attr('class', 'restriction-controls-container').append('div').attr('class', 'restriction-controls').merge(controls).call(renderControls);
          }

          function renderControls(selection) {
            var distControl = selection.selectAll('.restriction-distance').data([0]);
            distControl.exit().remove();
            var distControlEnter = distControl.enter().append('div').attr('class', 'restriction-control restriction-distance');
            distControlEnter.append('span').attr('class', 'restriction-control-label restriction-distance-label').html(_t.html('restriction.controls.distance') + ':');
            distControlEnter.append('input').attr('class', 'restriction-distance-input').attr('type', 'range').attr('min', '20').attr('max', '50').attr('step', '5');
            distControlEnter.append('span').attr('class', 'restriction-distance-text'); // update

            selection.selectAll('.restriction-distance-input').property('value', _maxDistance).on('input', function () {
              var val = select(this).property('value');
              _maxDistance = +val;
              _intersection = null;

              _container.selectAll('.layer-osm .layer-turns *').remove();

              corePreferences('turn-restriction-distance', _maxDistance);

              _parent.call(restrictions);
            });
            selection.selectAll('.restriction-distance-text').html(displayMaxDistance(_maxDistance));
            var viaControl = selection.selectAll('.restriction-via-way').data([0]);
            viaControl.exit().remove();
            var viaControlEnter = viaControl.enter().append('div').attr('class', 'restriction-control restriction-via-way');
            viaControlEnter.append('span').attr('class', 'restriction-control-label restriction-via-way-label').html(_t.html('restriction.controls.via') + ':');
            viaControlEnter.append('input').attr('class', 'restriction-via-way-input').attr('type', 'range').attr('min', '0').attr('max', '2').attr('step', '1');
            viaControlEnter.append('span').attr('class', 'restriction-via-way-text'); // update

            selection.selectAll('.restriction-via-way-input').property('value', _maxViaWay).on('input', function () {
              var val = select(this).property('value');
              _maxViaWay = +val;

              _container.selectAll('.layer-osm .layer-turns *').remove();

              corePreferences('turn-restriction-via-way0', _maxViaWay);

              _parent.call(restrictions);
            });
            selection.selectAll('.restriction-via-way-text').html(displayMaxVia(_maxViaWay));
          }

          function renderViewer(selection) {
            if (!_intersection) return;
            var vgraph = _intersection.graph;
            var filter = utilFunctor(true);
            var projection = geoRawMercator(); // Reflow warning: `utilGetDimensions` calls `getBoundingClientRect`
            // Instead of asking the restriction-container for its dimensions,
            //  we can ask the .sidebar, which can have its dimensions cached.
            // width: calc as sidebar - padding
            // height: hardcoded (from `80_app.css`)
            // var d = utilGetDimensions(selection);

            var sdims = utilGetDimensions(context.container().select('.sidebar'));
            var d = [sdims[0] - 50, 370];
            var c = geoVecScale(d, 0.5);
            var z = 22;
            projection.scale(geoZoomToScale(z)); // Calculate extent of all key vertices

            var extent = geoExtent();

            for (var i = 0; i < _intersection.vertices.length; i++) {
              extent._extend(_intersection.vertices[i].extent());
            } // If this is a large intersection, adjust zoom to fit extent


            if (_intersection.vertices.length > 1) {
              var padding = 180; // in z22 pixels

              var tl = projection([extent[0][0], extent[1][1]]);
              var br = projection([extent[1][0], extent[0][1]]);
              var hFactor = (br[0] - tl[0]) / (d[0] - padding);
              var vFactor = (br[1] - tl[1]) / (d[1] - padding);
              var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
              var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
              z = z - Math.max(hZoomDiff, vZoomDiff);
              projection.scale(geoZoomToScale(z));
            }

            var padTop = 35; // reserve top space for hint text

            var extentCenter = projection(extent.center());
            extentCenter[1] = extentCenter[1] - padTop;
            projection.translate(geoVecSubtract(c, extentCenter)).clipExtent([[0, 0], d]);
            var drawLayers = svgLayers(projection, context).only(['osm', 'touch']).dimensions(d);
            var drawVertices = svgVertices(projection, context);
            var drawLines = svgLines(projection, context);
            var drawTurns = svgTurns(projection, context);
            var firstTime = selection.selectAll('.surface').empty();
            selection.call(drawLayers);
            var surface = selection.selectAll('.surface').classed('tr', true);

            if (firstTime) {
              _initialized = true;
              surface.call(breathe);
            } // This can happen if we've lowered the detail while a FROM way
            // is selected, and that way is no longer part of the intersection.


            if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
              _fromWayID = null;
              _oldTurns = null;
            }

            surface.call(utilSetDimensions, d).call(drawVertices, vgraph, _intersection.vertices, filter, extent, z).call(drawLines, vgraph, _intersection.ways, filter).call(drawTurns, vgraph, _intersection.turns(_fromWayID, _maxViaWay));
            surface.on('click.restrictions', click).on('mouseover.restrictions', mouseover);
            surface.selectAll('.selected').classed('selected', false);
            surface.selectAll('.related').classed('related', false);
            var way;

            if (_fromWayID) {
              way = vgraph.entity(_fromWayID);
              surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
            }

            document.addEventListener('resizeWindow', function () {
              utilSetDimensions(_container, null);
              redraw(1);
            }, false);
            updateHints(null);

            function click(d3_event) {
              surface.call(breathe.off).call(breathe);
              var datum = d3_event.target.__data__;
              var entity = datum && datum.properties && datum.properties.entity;

              if (entity) {
                datum = entity;
              }

              if (datum instanceof osmWay && (datum.__from || datum.__via)) {
                _fromWayID = datum.id;
                _oldTurns = null;
                redraw();
              } else if (datum instanceof osmTurn) {
                var actions, extraActions, turns, i;
                var restrictionType = osmInferRestriction(vgraph, datum, projection);

                if (datum.restrictionID && !datum.direct) {
                  return;
                } else if (datum.restrictionID && !datum.only) {
                  // NO -> ONLY
                  var seen = {};
                  var datumOnly = JSON.parse(JSON.stringify(datum)); // deep clone the datum

                  datumOnly.only = true; // but change this property

                  restrictionType = restrictionType.replace(/^no/, 'only'); // Adding an ONLY restriction should destroy all other direct restrictions from the FROM towards the VIA.
                  // We will remember them in _oldTurns, and restore them if the user clicks again.

                  turns = _intersection.turns(_fromWayID, 2);
                  extraActions = [];
                  _oldTurns = [];

                  for (i = 0; i < turns.length; i++) {
                    var turn = turns[i];
                    if (seen[turn.restrictionID]) continue; // avoid deleting the turn twice (#4968, #4928)

                    if (turn.direct && turn.path[1] === datum.path[1]) {
                      seen[turns[i].restrictionID] = true;
                      turn.restrictionType = osmInferRestriction(vgraph, turn, projection);

                      _oldTurns.push(turn);

                      extraActions.push(actionUnrestrictTurn(turn));
                    }
                  }

                  actions = _intersection.actions.concat(extraActions, [actionRestrictTurn(datumOnly, restrictionType), _t('operations.restriction.annotation.create')]);
                } else if (datum.restrictionID) {
                  // ONLY -> Allowed
                  // Restore whatever restrictions we might have destroyed by cycling thru the ONLY state.
                  // This relies on the assumption that the intersection was already split up when we
                  // performed the previous action (NO -> ONLY), so the IDs in _oldTurns shouldn't have changed.
                  turns = _oldTurns || [];
                  extraActions = [];

                  for (i = 0; i < turns.length; i++) {
                    if (turns[i].key !== datum.key) {
                      extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
                    }
                  }

                  _oldTurns = null;
                  actions = _intersection.actions.concat(extraActions, [actionUnrestrictTurn(datum), _t('operations.restriction.annotation.delete')]);
                } else {
                  // Allowed -> NO
                  actions = _intersection.actions.concat([actionRestrictTurn(datum, restrictionType), _t('operations.restriction.annotation.create')]);
                }

                context.perform.apply(context, actions); // At this point the datum will be changed, but will have same key..
                // Refresh it and update the help..

                var s = surface.selectAll('.' + datum.key);
                datum = s.empty() ? null : s.datum();
                updateHints(datum);
              } else {
                _fromWayID = null;
                _oldTurns = null;
                redraw();
              }
            }

            function mouseover(d3_event) {
              var datum = d3_event.target.__data__;
              updateHints(datum);
            }

            _lastXPos = _lastXPos || sdims[0];

            function redraw(minChange) {
              var xPos = -1;

              if (minChange) {
                xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
              }

              if (!minChange || minChange && Math.abs(xPos - _lastXPos) >= minChange) {
                if (context.hasEntity(_vertexID)) {
                  _lastXPos = xPos;

                  _container.call(renderViewer);
                }
              }
            }

            function highlightPathsFrom(wayID) {
              surface.selectAll('.related').classed('related', false).classed('allow', false).classed('restrict', false).classed('only', false);
              surface.selectAll('.' + wayID).classed('related', true);

              if (wayID) {
                var turns = _intersection.turns(wayID, _maxViaWay);

                for (var i = 0; i < turns.length; i++) {
                  var turn = turns[i];
                  var ids = [turn.to.way];
                  var klass = turn.no ? 'restrict' : turn.only ? 'only' : 'allow';

                  if (turn.only || turns.length === 1) {
                    if (turn.via.ways) {
                      ids = ids.concat(turn.via.ways);
                    }
                  } else if (turn.to.way === wayID) {
                    continue;
                  }

                  surface.selectAll(utilEntitySelector(ids)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only');
                }
              }
            }

            function updateHints(datum) {
              var help = _container.selectAll('.restriction-help').html('');

              var placeholders = {};
              ['from', 'via', 'to'].forEach(function (k) {
                placeholders[k] = '<span class="qualifier">' + _t('restriction.help.' + k) + '</span>';
              });
              var entity = datum && datum.properties && datum.properties.entity;

              if (entity) {
                datum = entity;
              }

              if (_fromWayID) {
                way = vgraph.entity(_fromWayID);
                surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
              } // Hovering a way


              if (datum instanceof osmWay && datum.__from) {
                way = datum;
                highlightPathsFrom(_fromWayID ? null : way.id);
                surface.selectAll('.' + way.id).classed('related', true);
                var clickSelect = !_fromWayID || _fromWayID !== way.id;
                help.append('div') // "Click to select FROM {fromName}." / "FROM {fromName}"
                .html(_t.html('restriction.help.' + (clickSelect ? 'select_from_name' : 'from_name'), {
                  from: placeholders.from,
                  fromName: displayName(way.id, vgraph)
                })); // Hovering a turn arrow
              } else if (datum instanceof osmTurn) {
                var restrictionType = osmInferRestriction(vgraph, datum, projection);
                var turnType = restrictionType.replace(/^(only|no)\_/, '');
                var indirect = datum.direct === false ? _t.html('restriction.help.indirect') : '';
                var klass, turnText, nextText;

                if (datum.no) {
                  klass = 'restrict';
                  turnText = _t.html('restriction.help.turn.no_' + turnType, {
                    indirect: indirect
                  });
                  nextText = _t.html('restriction.help.turn.only_' + turnType, {
                    indirect: ''
                  });
                } else if (datum.only) {
                  klass = 'only';
                  turnText = _t.html('restriction.help.turn.only_' + turnType, {
                    indirect: indirect
                  });
                  nextText = _t.html('restriction.help.turn.allowed_' + turnType, {
                    indirect: ''
                  });
                } else {
                  klass = 'allow';
                  turnText = _t.html('restriction.help.turn.allowed_' + turnType, {
                    indirect: indirect
                  });
                  nextText = _t.html('restriction.help.turn.no_' + turnType, {
                    indirect: ''
                  });
                }

                help.append('div') // "NO Right Turn (indirect)"
                .attr('class', 'qualifier ' + klass).html(turnText);
                help.append('div') // "FROM {fromName} TO {toName}"
                .html(_t.html('restriction.help.from_name_to_name', {
                  from: placeholders.from,
                  fromName: displayName(datum.from.way, vgraph),
                  to: placeholders.to,
                  toName: displayName(datum.to.way, vgraph)
                }));

                if (datum.via.ways && datum.via.ways.length) {
                  var names = [];

                  for (var i = 0; i < datum.via.ways.length; i++) {
                    var prev = names[names.length - 1];
                    var curr = displayName(datum.via.ways[i], vgraph);

                    if (!prev || curr !== prev) {
                      // collapse identical names
                      names.push(curr);
                    }
                  }

                  help.append('div') // "VIA {viaNames}"
                  .html(_t.html('restriction.help.via_names', {
                    via: placeholders.via,
                    viaNames: names.join(', ')
                  }));
                }

                if (!indirect) {
                  help.append('div') // Click for "No Right Turn"
                  .html(_t.html('restriction.help.toggle', {
                    turn: nextText.trim()
                  }));
                }

                highlightPathsFrom(null);
                var alongIDs = datum.path.slice();
                surface.selectAll(utilEntitySelector(alongIDs)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only'); // Hovering empty surface
              } else {
                highlightPathsFrom(null);

                if (_fromWayID) {
                  help.append('div') // "FROM {fromName}"
                  .html(_t.html('restriction.help.from_name', {
                    from: placeholders.from,
                    fromName: displayName(_fromWayID, vgraph)
                  }));
                } else {
                  help.append('div') // "Click to select a FROM segment."
                  .html(_t.html('restriction.help.select_from', {
                    from: placeholders.from
                  }));
                }
              }
            }
          }

          function displayMaxDistance(maxDist) {
            var isImperial = !_mainLocalizer.usesMetric();
            var opts;

            if (isImperial) {
              var distToFeet = {
                // imprecise conversion for prettier display
                20: 70,
                25: 85,
                30: 100,
                35: 115,
                40: 130,
                45: 145,
                50: 160
              }[maxDist];
              opts = {
                distance: _t('units.feet', {
                  quantity: distToFeet
                })
              };
            } else {
              opts = {
                distance: _t('units.meters', {
                  quantity: maxDist
                })
              };
            }

            return _t.html('restriction.controls.distance_up_to', opts);
          }

          function displayMaxVia(maxVia) {
            return maxVia === 0 ? _t.html('restriction.controls.via_node_only') : maxVia === 1 ? _t.html('restriction.controls.via_up_to_one') : _t.html('restriction.controls.via_up_to_two');
          }

          function displayName(entityID, graph) {
            var entity = graph.entity(entityID);
            var name = utilDisplayName(entity) || '';
            var matched = _mainPresetIndex.match(entity, graph);
            var type = matched && matched.name() || utilDisplayType(entity.id);
            return name || type;
          }

          restrictions.entityIDs = function (val) {
            _intersection = null;
            _fromWayID = null;
            _oldTurns = null;
            _vertexID = val[0];
          };

          restrictions.tags = function () {};

          restrictions.focus = function () {};

          restrictions.off = function (selection) {
            if (!_initialized) return;
            selection.selectAll('.surface').call(breathe.off).on('click.restrictions', null).on('mouseover.restrictions', null);
            select(window).on('resize.restrictions', null);
          };

          return utilRebind(restrictions, dispatch, 'on');
        }
        uiFieldRestrictions.supportsMultiselection = false;

        function uiFieldTextarea(field, context) {
          var dispatch = dispatch$8('change');
          var input = select(null);

          var _tags;

          function textarea(selection) {
            var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
            wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
            input = wrap.selectAll('textarea').data([0]);
            input = input.enter().append('textarea').attr('id', field.domId).call(utilNoAuto).on('input', change(true)).on('blur', change()).on('change', change()).merge(input);
          }

          function change(onInput) {
            return function () {
              var val = utilGetSetValue(input);
              if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string

              if (!val && Array.isArray(_tags[field.key])) return;
              var t = {};
              t[field.key] = val || undefined;
              dispatch.call('change', this, t, onInput);
            };
          }

          textarea.tags = function (tags) {
            _tags = tags;
            var isMixed = Array.isArray(tags[field.key]);
            utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder() || _t('inspector.unknown')).classed('mixed', isMixed);
          };

          textarea.focus = function () {
            input.node().focus();
          };

          return utilRebind(textarea, dispatch, 'on');
        }

        var getOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;






        // eslint-disable-next-line es/no-string-prototype-endswith -- safe
        var $endsWith = ''.endsWith;
        var min = Math.min;

        var CORRECT_IS_REGEXP_LOGIC = correctIsRegexpLogic('endsWith');
        // https://github.com/zloirock/core-js/pull/702
        var MDN_POLYFILL_BUG = !CORRECT_IS_REGEXP_LOGIC && !!function () {
          var descriptor = getOwnPropertyDescriptor(String.prototype, 'endsWith');
          return descriptor && !descriptor.writable;
        }();

        // `String.prototype.endsWith` method
        // https://tc39.es/ecma262/#sec-string.prototype.endswith
        _export({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, {
          endsWith: function endsWith(searchString /* , endPosition = @length */) {
            var that = String(requireObjectCoercible(this));
            notARegexp(searchString);
            var endPosition = arguments.length > 1 ? arguments[1] : undefined;
            var len = toLength(that.length);
            var end = endPosition === undefined ? len : min(toLength(endPosition), len);
            var search = String(searchString);
            return $endsWith
              ? $endsWith.call(that, search, end)
              : that.slice(end - search.length, end) === search;
          }
        });

        function uiFieldWikidata(field, context) {
          var wikidata = services.wikidata;
          var dispatch = dispatch$8('change');

          var _selection = select(null);

          var _searchInput = select(null);

          var _qid = null;
          var _wikidataEntity = null;
          var _wikiURL = '';
          var _entityIDs = [];

          var _wikipediaKey = field.keys && field.keys.find(function (key) {
            return key.includes('wikipedia');
          }),
              _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];

          var combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(true).minItems(1);

          function wiki(selection) {
            _selection = selection;
            var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
            wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
            var list = wrap.selectAll('ul').data([0]);
            list = list.enter().append('ul').attr('class', 'rows').merge(list);
            var searchRow = list.selectAll('li.wikidata-search').data([0]);
            var searchRowEnter = searchRow.enter().append('li').attr('class', 'wikidata-search');
            searchRowEnter.append('input').attr('type', 'text').attr('id', field.domId).style('flex', '1').call(utilNoAuto).on('focus', function () {
              var node = select(this).node();
              node.setSelectionRange(0, node.value.length);
            }).on('blur', function () {
              setLabelForEntity();
            }).call(combobox.fetcher(fetchWikidataItems));
            combobox.on('accept', function (d) {
              if (d) {
                _qid = d.id;
                change();
              }
            }).on('cancel', function () {
              setLabelForEntity();
            });
            searchRowEnter.append('button').attr('class', 'form-field-button wiki-link').attr('title', _t('icons.view_on', {
              domain: 'wikidata.org'
            })).call(svgIcon('#iD-icon-out-link')).on('click', function (d3_event) {
              d3_event.preventDefault();
              if (_wikiURL) window.open(_wikiURL, '_blank');
            });
            searchRow = searchRow.merge(searchRowEnter);
            _searchInput = searchRow.select('input');
            var wikidataProperties = ['description', 'identifier'];
            var items = list.selectAll('li.labeled-input').data(wikidataProperties); // Enter

            var enter = items.enter().append('li').attr('class', function (d) {
              return 'labeled-input preset-wikidata-' + d;
            });
            enter.append('span').attr('class', 'label').html(function (d) {
              return _t.html('wikidata.' + d);
            });
            enter.append('input').attr('type', 'text').call(utilNoAuto).classed('disabled', 'true').attr('readonly', 'true');
            enter.append('button').attr('class', 'form-field-button').attr('title', _t('icons.copy')).call(svgIcon('#iD-operation-copy')).on('click', function (d3_event) {
              d3_event.preventDefault();
              select(this.parentNode).select('input').node().select();
              document.execCommand('copy');
            });
          }

          function fetchWikidataItems(q, callback) {
            if (!q && _hintKey) {
              // other tags may be good search terms
              for (var i in _entityIDs) {
                var entity = context.hasEntity(_entityIDs[i]);

                if (entity.tags[_hintKey]) {
                  q = entity.tags[_hintKey];
                  break;
                }
              }
            }

            wikidata.itemsForSearchQuery(q, function (err, data) {
              if (err) return;

              for (var i in data) {
                data[i].value = data[i].label + ' (' + data[i].id + ')';
                data[i].title = data[i].description;
              }

              if (callback) callback(data);
            });
          }

          function change() {
            var syncTags = {};
            syncTags[field.key] = _qid;
            dispatch.call('change', this, syncTags); // attempt asynchronous update of wikidata tag..

            var initGraph = context.graph();
            var initEntityIDs = _entityIDs;
            wikidata.entityByQID(_qid, function (err, entity) {
              if (err) return; // If graph has changed, we can't apply this update.

              if (context.graph() !== initGraph) return;
              if (!entity.sitelinks) return;
              var langs = wikidata.languagesToQuery(); // use the label and description languages as fallbacks

              ['labels', 'descriptions'].forEach(function (key) {
                if (!entity[key]) return;
                var valueLangs = Object.keys(entity[key]);
                if (valueLangs.length === 0) return;
                var valueLang = valueLangs[0];

                if (langs.indexOf(valueLang) === -1) {
                  langs.push(valueLang);
                }
              });
              var newWikipediaValue;

              if (_wikipediaKey) {
                var foundPreferred;

                for (var i in langs) {
                  var lang = langs[i];
                  var siteID = lang.replace('-', '_') + 'wiki';

                  if (entity.sitelinks[siteID]) {
                    foundPreferred = true;
                    newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title; // use the first match

                    break;
                  }
                }

                if (!foundPreferred) {
                  // No wikipedia sites available in the user's language or the fallback languages,
                  // default to any wikipedia sitelink
                  var wikiSiteKeys = Object.keys(entity.sitelinks).filter(function (site) {
                    return site.endsWith('wiki');
                  });

                  if (wikiSiteKeys.length === 0) {
                    // if no wikipedia pages are linked to this wikidata entity, delete that tag
                    newWikipediaValue = null;
                  } else {
                    var wikiLang = wikiSiteKeys[0].slice(0, -4).replace('_', '-');
                    var wikiTitle = entity.sitelinks[wikiSiteKeys[0]].title;
                    newWikipediaValue = wikiLang + ':' + wikiTitle;
                  }
                }
              }

              if (newWikipediaValue) {
                newWikipediaValue = context.cleanTagValue(newWikipediaValue);
              }

              if (typeof newWikipediaValue === 'undefined') return;
              var actions = initEntityIDs.map(function (entityID) {
                var entity = context.hasEntity(entityID);
                if (!entity) return null;
                var currTags = Object.assign({}, entity.tags); // shallow copy

                if (newWikipediaValue === null) {
                  if (!currTags[_wikipediaKey]) return null;
                  delete currTags[_wikipediaKey];
                } else {
                  currTags[_wikipediaKey] = newWikipediaValue;
                }

                return actionChangeTags(entityID, currTags);
              }).filter(Boolean);
              if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change

              context.overwrite(function actionUpdateWikipediaTags(graph) {
                actions.forEach(function (action) {
                  graph = action(graph);
                });
                return graph;
              }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
              // changeTags() is not intended to be called asynchronously
            });
          }

          function setLabelForEntity() {
            var label = '';

            if (_wikidataEntity) {
              label = entityPropertyForDisplay(_wikidataEntity, 'labels');

              if (label.length === 0) {
                label = _wikidataEntity.id.toString();
              }
            }

            utilGetSetValue(_searchInput, label);
          }

          wiki.tags = function (tags) {
            var isMixed = Array.isArray(tags[field.key]);

            _searchInput.attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : '').classed('mixed', isMixed);

            _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';

            if (!/^Q[0-9]*$/.test(_qid)) {
              // not a proper QID
              unrecognized();
              return;
            } // QID value in correct format


            _wikiURL = 'https://wikidata.org/wiki/' + _qid;
            wikidata.entityByQID(_qid, function (err, entity) {
              if (err) {
                unrecognized();
                return;
              }

              _wikidataEntity = entity;
              setLabelForEntity();
              var description = entityPropertyForDisplay(entity, 'descriptions');

              _selection.select('button.wiki-link').classed('disabled', false);

              _selection.select('.preset-wikidata-description').style('display', function () {
                return description.length > 0 ? 'flex' : 'none';
              }).select('input').attr('value', description);

              _selection.select('.preset-wikidata-identifier').style('display', function () {
                return entity.id ? 'flex' : 'none';
              }).select('input').attr('value', entity.id);
            }); // not a proper QID

            function unrecognized() {
              _wikidataEntity = null;
              setLabelForEntity();

              _selection.select('.preset-wikidata-description').style('display', 'none');

              _selection.select('.preset-wikidata-identifier').style('display', 'none');

              _selection.select('button.wiki-link').classed('disabled', true);

              if (_qid && _qid !== '') {
                _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
              } else {
                _wikiURL = '';
              }
            }
          };

          function entityPropertyForDisplay(wikidataEntity, propKey) {
            if (!wikidataEntity[propKey]) return '';
            var propObj = wikidataEntity[propKey];
            var langKeys = Object.keys(propObj);
            if (langKeys.length === 0) return ''; // sorted by priority, since we want to show the user's language first if possible

            var langs = wikidata.languagesToQuery();

            for (var i in langs) {
              var lang = langs[i];
              var valueObj = propObj[lang];
              if (valueObj && valueObj.value && valueObj.value.length > 0) return valueObj.value;
            } // default to any available value


            return propObj[langKeys[0]].value;
          }

          wiki.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;
            _entityIDs = val;
            return wiki;
          };

          wiki.focus = function () {
            _searchInput.node().focus();
          };

          return utilRebind(wiki, dispatch, 'on');
        }

        function uiFieldWikipedia(field, context) {
          var _arguments = arguments;
          var dispatch = dispatch$8('change');
          var wikipedia = services.wikipedia;
          var wikidata = services.wikidata;

          var _langInput = select(null);

          var _titleInput = select(null);

          var _wikiURL = '';

          var _entityIDs;

          var _tags;

          var _dataWikipedia = [];
          _mainFileFetcher.get('wmf_sitematrix').then(function (d) {
            _dataWikipedia = d;
            if (_tags) updateForTags(_tags);
          })["catch"](function () {
            /* ignore */
          });
          var langCombo = uiCombobox(context, 'wikipedia-lang').fetcher(function (value, callback) {
            var v = value.toLowerCase();
            callback(_dataWikipedia.filter(function (d) {
              return d[0].toLowerCase().indexOf(v) >= 0 || d[1].toLowerCase().indexOf(v) >= 0 || d[2].toLowerCase().indexOf(v) >= 0;
            }).map(function (d) {
              return {
                value: d[1]
              };
            }));
          });
          var titleCombo = uiCombobox(context, 'wikipedia-title').fetcher(function (value, callback) {
            if (!value) {
              value = '';

              for (var i in _entityIDs) {
                var entity = context.hasEntity(_entityIDs[i]);

                if (entity.tags.name) {
                  value = entity.tags.name;
                  break;
                }
              }
            }

            var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
            searchfn(language()[2], value, function (query, data) {
              callback(data.map(function (d) {
                return {
                  value: d
                };
              }));
            });
          });

          function wiki(selection) {
            var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
            wrap = wrap.enter().append('div').attr('class', "form-field-input-wrap form-field-input-".concat(field.type)).merge(wrap);
            var langContainer = wrap.selectAll('.wiki-lang-container').data([0]);
            langContainer = langContainer.enter().append('div').attr('class', 'wiki-lang-container').merge(langContainer);
            _langInput = langContainer.selectAll('input.wiki-lang').data([0]);
            _langInput = _langInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-lang').attr('placeholder', _t('translate.localized_translation_language')).call(utilNoAuto).call(langCombo).merge(_langInput);

            _langInput.on('blur', changeLang).on('change', changeLang);

            var titleContainer = wrap.selectAll('.wiki-title-container').data([0]);
            titleContainer = titleContainer.enter().append('div').attr('class', 'wiki-title-container').merge(titleContainer);
            _titleInput = titleContainer.selectAll('input.wiki-title').data([0]);
            _titleInput = _titleInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-title').attr('id', field.domId).call(utilNoAuto).call(titleCombo).merge(_titleInput);

            _titleInput.on('blur', function () {
              change(true);
            }).on('change', function () {
              change(false);
            });

            var link = titleContainer.selectAll('.wiki-link').data([0]);
            link = link.enter().append('button').attr('class', 'form-field-button wiki-link').attr('title', _t('icons.view_on', {
              domain: 'wikipedia.org'
            })).call(svgIcon('#iD-icon-out-link')).merge(link);
            link.on('click', function (d3_event) {
              d3_event.preventDefault();
              if (_wikiURL) window.open(_wikiURL, '_blank');
            });
          }

          function defaultLanguageInfo(skipEnglishFallback) {
            var langCode = _mainLocalizer.languageCode().toLowerCase();

            for (var i in _dataWikipedia) {
              var d = _dataWikipedia[i]; // default to the language of iD's current locale

              if (d[2] === langCode) return d;
            } // fallback to English


            return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
          }

          function language(skipEnglishFallback) {
            var value = utilGetSetValue(_langInput).toLowerCase();

            for (var i in _dataWikipedia) {
              var d = _dataWikipedia[i]; // return the language already set in the UI, if supported

              if (d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value) return d;
            } // fallback to English


            return defaultLanguageInfo(skipEnglishFallback);
          }

          function changeLang() {
            utilGetSetValue(_langInput, language()[1]);
            change(true);
          }

          function change(skipWikidata) {
            var value = utilGetSetValue(_titleInput);
            var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);

            var langInfo = m && _dataWikipedia.find(function (d) {
              return m[1] === d[2];
            });

            var syncTags = {};

            if (langInfo) {
              var nativeLangName = langInfo[1]; // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization

              value = decodeURIComponent(m[2]).replace(/_/g, ' ');

              if (m[3]) {
                var anchor; // try {
                // leave this out for now - #6232
                // Best-effort `anchordecode:` implementation
                // anchor = decodeURIComponent(m[3].replace(/\.([0-9A-F]{2})/g, '%$1'));
                // } catch (e) {

                anchor = decodeURIComponent(m[3]); // }

                value += '#' + anchor.replace(/_/g, ' ');
              }

              value = value.slice(0, 1).toUpperCase() + value.slice(1);
              utilGetSetValue(_langInput, nativeLangName);
              utilGetSetValue(_titleInput, value);
            }

            if (value) {
              syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
            } else {
              syncTags.wikipedia = undefined;
            }

            dispatch.call('change', this, syncTags);
            if (skipWikidata || !value || !language()[2]) return; // attempt asynchronous update of wikidata tag..

            var initGraph = context.graph();
            var initEntityIDs = _entityIDs;
            wikidata.itemsByTitle(language()[2], value, function (err, data) {
              if (err || !data || !Object.keys(data).length) return; // If graph has changed, we can't apply this update.

              if (context.graph() !== initGraph) return;
              var qids = Object.keys(data);
              var value = qids && qids.find(function (id) {
                return id.match(/^Q\d+$/);
              });
              var actions = initEntityIDs.map(function (entityID) {
                var entity = context.entity(entityID).tags;
                var currTags = Object.assign({}, entity); // shallow copy

                if (currTags.wikidata !== value) {
                  currTags.wikidata = value;
                  return actionChangeTags(entityID, currTags);
                }

                return null;
              }).filter(Boolean);
              if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change

              context.overwrite(function actionUpdateWikidataTags(graph) {
                actions.forEach(function (action) {
                  graph = action(graph);
                });
                return graph;
              }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
              // changeTags() is not intended to be called asynchronously
            });
          }

          wiki.tags = function (tags) {
            _tags = tags;
            updateForTags(tags);
          };

          function updateForTags(tags) {
            var value = typeof tags[field.key] === 'string' ? tags[field.key] : ''; // Expect tag format of `tagLang:tagArticleTitle`, e.g. `fr:Paris`, with
            // optional suffix of `#anchor`

            var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
            var tagLang = m && m[1];
            var tagArticleTitle = m && m[2];
            var anchor = m && m[3];

            var tagLangInfo = tagLang && _dataWikipedia.find(function (d) {
              return tagLang === d[2];
            }); // value in correct format


            if (tagLangInfo) {
              var nativeLangName = tagLangInfo[1];
              utilGetSetValue(_langInput, nativeLangName);
              utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? '#' + anchor : ''));

              if (anchor) {
                try {
                  // Best-effort `anchorencode:` implementation
                  anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
                } catch (e) {
                  anchor = anchor.replace(/ /g, '_');
                }
              }

              _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' + tagArticleTitle.replace(/ /g, '_') + (anchor ? '#' + anchor : ''); // unrecognized value format
            } else {
              utilGetSetValue(_titleInput, value);

              if (value && value !== '') {
                utilGetSetValue(_langInput, '');
                var defaultLangInfo = defaultLanguageInfo();
                _wikiURL = "https://".concat(defaultLangInfo[2], ".wikipedia.org/w/index.php?fulltext=1&search=").concat(value);
              } else {
                var shownOrDefaultLangInfo = language(true
                /* skipEnglishFallback */
                );
                utilGetSetValue(_langInput, shownOrDefaultLangInfo[1]);
                _wikiURL = '';
              }
            }
          }

          wiki.entityIDs = function (val) {
            if (!_arguments.length) return _entityIDs;
            _entityIDs = val;
            return wiki;
          };

          wiki.focus = function () {
            _titleInput.node().focus();
          };

          return utilRebind(wiki, dispatch, 'on');
        }
        uiFieldWikipedia.supportsMultiselection = false;

        var uiFields = {
          access: uiFieldAccess,
          address: uiFieldAddress,
          check: uiFieldCheck,
          combo: uiFieldCombo,
          cycleway: uiFieldCycleway,
          defaultCheck: uiFieldCheck,
          email: uiFieldText,
          identifier: uiFieldText,
          lanes: uiFieldLanes,
          localized: uiFieldLocalized,
          roadspeed: uiFieldRoadspeed,
          roadheight: uiFieldText,
          manyCombo: uiFieldCombo,
          multiCombo: uiFieldCombo,
          networkCombo: uiFieldCombo,
          number: uiFieldText,
          onewayCheck: uiFieldCheck,
          radio: uiFieldRadio,
          restrictions: uiFieldRestrictions,
          semiCombo: uiFieldCombo,
          structureRadio: uiFieldRadio,
          tel: uiFieldText,
          text: uiFieldText,
          textarea: uiFieldTextarea,
          typeCombo: uiFieldCombo,
          url: uiFieldText,
          wikidata: uiFieldWikidata,
          wikipedia: uiFieldWikipedia
        };

        function uiField(context, presetField, entityIDs, options) {
          options = Object.assign({
            show: true,
            wrap: true,
            remove: true,
            revert: true,
            info: true
          }, options);
          var dispatch = dispatch$8('change', 'revert');
          var field = Object.assign({}, presetField); // shallow copy

          field.domId = utilUniqueDomId('form-field-' + field.safeid);
          var _show = options.show;
          var _state = '';
          var _tags = {};

          var _entityExtent;

          if (entityIDs && entityIDs.length) {
            _entityExtent = entityIDs.reduce(function (extent, entityID) {
              var entity = context.graph().entity(entityID);
              return extent.extend(entity.extent(context.graph()));
            }, geoExtent());
          }

          var _locked = false;

          var _lockedTip = uiTooltip().title(_t.html('inspector.lock.suggestion', {
            label: field.label
          })).placement('bottom');

          field.keys = field.keys || [field.key]; // only create the fields that are actually being shown

          if (_show && !field.impl) {
            createField();
          } // Creates the field.. This is done lazily,
          // once we know that the field will be shown.


          function createField() {
            field.impl = uiFields[field.type](field, context).on('change', function (t, onInput) {
              dispatch.call('change', field, t, onInput);
            });

            if (entityIDs) {
              field.entityIDs = entityIDs; // if this field cares about the entities, pass them along

              if (field.impl.entityIDs) {
                field.impl.entityIDs(entityIDs);
              }
            }
          }

          function isModified() {
            if (!entityIDs || !entityIDs.length) return false;
            return entityIDs.some(function (entityID) {
              var original = context.graph().base().entities[entityID];
              var latest = context.graph().entity(entityID);
              return field.keys.some(function (key) {
                return original ? latest.tags[key] !== original.tags[key] : latest.tags[key];
              });
            });
          }

          function tagsContainFieldKey() {
            return field.keys.some(function (key) {
              if (field.type === 'multiCombo') {
                for (var tagKey in _tags) {
                  if (tagKey.indexOf(key) === 0) {
                    return true;
                  }
                }

                return false;
              }

              return _tags[key] !== undefined;
            });
          }

          function revert(d3_event, d) {
            d3_event.stopPropagation();
            d3_event.preventDefault();
            if (!entityIDs || _locked) return;
            dispatch.call('revert', d, d.keys);
          }

          function remove(d3_event, d) {
            d3_event.stopPropagation();
            d3_event.preventDefault();
            if (_locked) return;
            var t = {};
            d.keys.forEach(function (key) {
              t[key] = undefined;
            });
            dispatch.call('change', d, t);
          }

          field.render = function (selection) {
            var container = selection.selectAll('.form-field').data([field]); // Enter

            var enter = container.enter().append('div').attr('class', function (d) {
              return 'form-field form-field-' + d.safeid;
            }).classed('nowrap', !options.wrap);

            if (options.wrap) {
              var labelEnter = enter.append('label').attr('class', 'field-label').attr('for', function (d) {
                return d.domId;
              });
              var textEnter = labelEnter.append('span').attr('class', 'label-text');
              textEnter.append('span').attr('class', 'label-textvalue').html(function (d) {
                return d.label();
              });
              textEnter.append('span').attr('class', 'label-textannotation');

              if (options.remove) {
                labelEnter.append('button').attr('class', 'remove-icon').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete'));
              }

              if (options.revert) {
                labelEnter.append('button').attr('class', 'modified-icon').attr('title', _t('icons.undo')).call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo'));
              }
            } // Update


            container = container.merge(enter);
            container.select('.field-label > .remove-icon') // propagate bound data
            .on('click', remove);
            container.select('.field-label > .modified-icon') // propagate bound data
            .on('click', revert);
            container.each(function (d) {
              var selection = select(this);

              if (!d.impl) {
                createField();
              }

              var reference, help; // instantiate field help

              if (options.wrap && field.type === 'restrictions') {
                help = uiFieldHelp(context, 'restrictions');
              } // instantiate tag reference


              if (options.wrap && options.info) {
                var referenceKey = d.key || '';

                if (d.type === 'multiCombo') {
                  // lookup key without the trailing ':'
                  referenceKey = referenceKey.replace(/:$/, '');
                }

                reference = uiTagReference(d.reference || {
                  key: referenceKey
                });

                if (_state === 'hover') {
                  reference.showing(false);
                }
              }

              selection.call(d.impl); // add field help components

              if (help) {
                selection.call(help.body).select('.field-label').call(help.button);
              } // add tag reference components


              if (reference) {
                selection.call(reference.body).select('.field-label').call(reference.button);
              }

              d.impl.tags(_tags);
            });
            container.classed('locked', _locked).classed('modified', isModified()).classed('present', tagsContainFieldKey()); // show a tip and lock icon if the field is locked

            var annotation = container.selectAll('.field-label .label-textannotation');
            var icon = annotation.selectAll('.icon').data(_locked ? [0] : []);
            icon.exit().remove();
            icon.enter().append('svg').attr('class', 'icon').append('use').attr('xlink:href', '#fas-lock');
            container.call(_locked ? _lockedTip : _lockedTip.destroy);
          };

          field.state = function (val) {
            if (!arguments.length) return _state;
            _state = val;
            return field;
          };

          field.tags = function (val) {
            if (!arguments.length) return _tags;
            _tags = val;

            if (tagsContainFieldKey() && !_show) {
              // always show a field if it has a value to display
              _show = true;

              if (!field.impl) {
                createField();
              }
            }

            return field;
          };

          field.locked = function (val) {
            if (!arguments.length) return _locked;
            _locked = val;
            return field;
          };

          field.show = function () {
            _show = true;

            if (!field.impl) {
              createField();
            }

            if (field["default"] && field.key && _tags[field.key] !== field["default"]) {
              var t = {};
              t[field.key] = field["default"];
              dispatch.call('change', this, t);
            }
          }; // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown


          field.isShown = function () {
            return _show;
          }; // An allowed field can appear in the UI or in the 'Add field' dropdown.
          // A non-allowed field is hidden from the user altogether


          field.isAllowed = function () {
            if (entityIDs && entityIDs.length > 1 && uiFields[field.type].supportsMultiselection === false) return false;
            if (field.geometry && !entityIDs.every(function (entityID) {
              return field.matchGeometry(context.graph().geometry(entityID));
            })) return false;

            if (entityIDs && _entityExtent && field.locationSetID) {
              // is field allowed in this location?
              var validLocations = _mainLocations.locationsAt(_entityExtent.center());
              if (!validLocations[field.locationSetID]) return false;
            }

            var prerequisiteTag = field.prerequisiteTag;

            if (entityIDs && !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
            prerequisiteTag) {
              if (!entityIDs.every(function (entityID) {
                var entity = context.graph().entity(entityID);

                if (prerequisiteTag.key) {
                  var value = entity.tags[prerequisiteTag.key];
                  if (!value) return false;

                  if (prerequisiteTag.valueNot) {
                    return prerequisiteTag.valueNot !== value;
                  }

                  if (prerequisiteTag.value) {
                    return prerequisiteTag.value === value;
                  }
                } else if (prerequisiteTag.keyNot) {
                  if (entity.tags[prerequisiteTag.keyNot]) return false;
                }

                return true;
              })) return false;
            }

            return true;
          };

          field.focus = function () {
            if (field.impl) {
              field.impl.focus();
            }
          };

          return utilRebind(field, dispatch, 'on');
        }

        function uiFormFields(context) {
          var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
          var _fieldsArr = [];
          var _lastPlaceholder = '';
          var _state = '';
          var _klass = '';

          function formFields(selection) {
            var allowedFields = _fieldsArr.filter(function (field) {
              return field.isAllowed();
            });

            var shown = allowedFields.filter(function (field) {
              return field.isShown();
            });
            var notShown = allowedFields.filter(function (field) {
              return !field.isShown();
            });
            var container = selection.selectAll('.form-fields-container').data([0]);
            container = container.enter().append('div').attr('class', 'form-fields-container ' + (_klass || '')).merge(container);
            var fields = container.selectAll('.wrap-form-field').data(shown, function (d) {
              return d.id + (d.entityIDs ? d.entityIDs.join() : '');
            });
            fields.exit().remove(); // Enter

            var enter = fields.enter().append('div').attr('class', function (d) {
              return 'wrap-form-field wrap-form-field-' + d.safeid;
            }); // Update

            fields = fields.merge(enter);
            fields.order().each(function (d) {
              select(this).call(d.render);
            });
            var titles = [];
            var moreFields = notShown.map(function (field) {
              var title = field.title();
              titles.push(title);
              var terms = field.terms();
              if (field.key) terms.push(field.key);
              if (field.keys) terms = terms.concat(field.keys);
              return {
                display: field.label(),
                value: title,
                title: title,
                field: field,
                terms: terms
              };
            });
            var placeholder = titles.slice(0, 3).join(', ') + (titles.length > 3 ? '…' : '');
            var more = selection.selectAll('.more-fields').data(_state === 'hover' || moreFields.length === 0 ? [] : [0]);
            more.exit().remove();
            var moreEnter = more.enter().append('div').attr('class', 'more-fields').append('label');
            moreEnter.append('span').html(_t.html('inspector.add_fields'));
            more = moreEnter.merge(more);
            var input = more.selectAll('.value').data([0]);
            input.exit().remove();
            input = input.enter().append('input').attr('class', 'value').attr('type', 'text').attr('placeholder', placeholder).call(utilNoAuto).merge(input);
            input.call(utilGetSetValue, '').call(moreCombo.data(moreFields).on('accept', function (d) {
              if (!d) return; // user entered something that was not matched

              var field = d.field;
              field.show();
              selection.call(formFields); // rerender

              field.focus();
            })); // avoid updating placeholder excessively (triggers style recalc)

            if (_lastPlaceholder !== placeholder) {
              input.attr('placeholder', placeholder);
              _lastPlaceholder = placeholder;
            }
          }

          formFields.fieldsArr = function (val) {
            if (!arguments.length) return _fieldsArr;
            _fieldsArr = val || [];
            return formFields;
          };

          formFields.state = function (val) {
            if (!arguments.length) return _state;
            _state = val;
            return formFields;
          };

          formFields.klass = function (val) {
            if (!arguments.length) return _klass;
            _klass = val;
            return formFields;
          };

          return formFields;
        }

        function uiSectionPresetFields(context) {
          var section = uiSection('preset-fields', context).label(_t.html('inspector.fields')).disclosureContent(renderDisclosureContent);
          var dispatch = dispatch$8('change', 'revert');
          var formFields = uiFormFields(context);

          var _state;

          var _fieldsArr;

          var _presets = [];

          var _tags;

          var _entityIDs;

          function renderDisclosureContent(selection) {
            if (!_fieldsArr) {
              var graph = context.graph();
              var geometries = Object.keys(_entityIDs.reduce(function (geoms, entityID) {
                geoms[graph.entity(entityID).geometry(graph)] = true;
                return geoms;
              }, {}));
              var presetsManager = _mainPresetIndex;
              var allFields = [];
              var allMoreFields = [];
              var sharedTotalFields;

              _presets.forEach(function (preset) {
                var fields = preset.fields();
                var moreFields = preset.moreFields();
                allFields = utilArrayUnion(allFields, fields);
                allMoreFields = utilArrayUnion(allMoreFields, moreFields);

                if (!sharedTotalFields) {
                  sharedTotalFields = utilArrayUnion(fields, moreFields);
                } else {
                  sharedTotalFields = sharedTotalFields.filter(function (field) {
                    return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
                  });
                }
              });

              var sharedFields = allFields.filter(function (field) {
                return sharedTotalFields.indexOf(field) !== -1;
              });
              var sharedMoreFields = allMoreFields.filter(function (field) {
                return sharedTotalFields.indexOf(field) !== -1;
              });
              _fieldsArr = [];
              sharedFields.forEach(function (field) {
                if (field.matchAllGeometry(geometries)) {
                  _fieldsArr.push(uiField(context, field, _entityIDs));
                }
              });
              var singularEntity = _entityIDs.length === 1 && graph.hasEntity(_entityIDs[0]);

              if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
                _fieldsArr.push(uiField(context, presetsManager.field('restrictions'), _entityIDs));
              }

              var additionalFields = utilArrayUnion(sharedMoreFields, presetsManager.universal());
              additionalFields.sort(function (field1, field2) {
                return field1.label().localeCompare(field2.label(), _mainLocalizer.localeCode());
              });
              additionalFields.forEach(function (field) {
                if (sharedFields.indexOf(field) === -1 && field.matchAllGeometry(geometries)) {
                  _fieldsArr.push(uiField(context, field, _entityIDs, {
                    show: false
                  }));
                }
              });

              _fieldsArr.forEach(function (field) {
                field.on('change', function (t, onInput) {
                  dispatch.call('change', field, _entityIDs, t, onInput);
                }).on('revert', function (keys) {
                  dispatch.call('revert', field, keys);
                });
              });
            }

            _fieldsArr.forEach(function (field) {
              field.state(_state).tags(_tags);
            });

            selection.call(formFields.fieldsArr(_fieldsArr).state(_state).klass('grouped-items-area'));
            selection.selectAll('.wrap-form-field input').on('keydown', function (d3_event) {
              // if user presses enter, and combobox is not active, accept edits..
              if (d3_event.keyCode === 13 && // ↩ Return
              context.container().select('.combobox').empty()) {
                context.enter(modeBrowse(context));
              }
            });
          }

          section.presets = function (val) {
            if (!arguments.length) return _presets;

            if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
              _presets = val;
              _fieldsArr = null;
            }

            return section;
          };

          section.state = function (val) {
            if (!arguments.length) return _state;
            _state = val;
            return section;
          };

          section.tags = function (val) {
            if (!arguments.length) return _tags;
            _tags = val; // Don't reset _fieldsArr here.

            return section;
          };

          section.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;

            if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
              _entityIDs = val;
              _fieldsArr = null;
            }

            return section;
          };

          return utilRebind(section, dispatch, 'on');
        }

        function uiSectionRawMemberEditor(context) {
          var section = uiSection('raw-member-editor', context).shouldDisplay(function () {
            if (!_entityIDs || _entityIDs.length !== 1) return false;
            var entity = context.hasEntity(_entityIDs[0]);
            return entity && entity.type === 'relation';
          }).label(function () {
            var entity = context.hasEntity(_entityIDs[0]);
            if (!entity) return '';
            var gt = entity.members.length > _maxMembers ? '>' : '';
            var count = gt + entity.members.slice(0, _maxMembers).length;
            return _t('inspector.title_count', {
              title: _t.html('inspector.members'),
              count: count
            });
          }).disclosureContent(renderDisclosureContent);
          var taginfo = services.taginfo;

          var _entityIDs;

          var _maxMembers = 1000;

          function downloadMember(d3_event, d) {
            d3_event.preventDefault(); // display the loading indicator

            select(this.parentNode).classed('tag-reference-loading', true);
            context.loadEntity(d.id, function () {
              section.reRender();
            });
          }

          function zoomToMember(d3_event, d) {
            d3_event.preventDefault();
            var entity = context.entity(d.id);
            context.map().zoomToEase(entity); // highlight the feature in case it wasn't previously on-screen

            utilHighlightEntities([d.id], true, context);
          }

          function selectMember(d3_event, d) {
            d3_event.preventDefault(); // remove the hover-highlight styling

            utilHighlightEntities([d.id], false, context);
            var entity = context.entity(d.id);
            var mapExtent = context.map().extent();

            if (!entity.intersects(mapExtent, context.graph())) {
              // zoom to the entity if its extent is not visible now
              context.map().zoomToEase(entity);
            }

            context.enter(modeSelect(context, [d.id]));
          }

          function changeRole(d3_event, d) {
            var oldRole = d.role;
            var newRole = context.cleanRelationRole(select(this).property('value'));

            if (oldRole !== newRole) {
              var member = {
                id: d.id,
                type: d.type,
                role: newRole
              };
              context.perform(actionChangeMember(d.relation.id, member, d.index), _t('operations.change_role.annotation', {
                n: 1
              }));
              context.validator().validate();
            }
          }

          function deleteMember(d3_event, d) {
            // remove the hover-highlight styling
            utilHighlightEntities([d.id], false, context);
            context.perform(actionDeleteMember(d.relation.id, d.index), _t('operations.delete_member.annotation', {
              n: 1
            }));

            if (!context.hasEntity(d.relation.id)) {
              // Removing the last member will also delete the relation.
              // If this happens we need to exit the selection mode
              context.enter(modeBrowse(context));
            } else {
              // Changing the mode also runs `validate`, but otherwise we need to
              // rerun it manually
              context.validator().validate();
            }
          }

          function renderDisclosureContent(selection) {
            var entityID = _entityIDs[0];
            var memberships = [];
            var entity = context.entity(entityID);
            entity.members.slice(0, _maxMembers).forEach(function (member, index) {
              memberships.push({
                index: index,
                id: member.id,
                type: member.type,
                role: member.role,
                relation: entity,
                member: context.hasEntity(member.id),
                domId: utilUniqueDomId(entityID + '-member-' + index)
              });
            });
            var list = selection.selectAll('.member-list').data([0]);
            list = list.enter().append('ul').attr('class', 'member-list').merge(list);
            var items = list.selectAll('li').data(memberships, function (d) {
              return osmEntity.key(d.relation) + ',' + d.index + ',' + (d.member ? osmEntity.key(d.member) : 'incomplete');
            });
            items.exit().each(unbind).remove();
            var itemsEnter = items.enter().append('li').attr('class', 'member-row form-field').classed('member-incomplete', function (d) {
              return !d.member;
            });
            itemsEnter.each(function (d) {
              var item = select(this);
              var label = item.append('label').attr('class', 'field-label').attr('for', d.domId);

              if (d.member) {
                // highlight the member feature in the map while hovering on the list item
                item.on('mouseover', function () {
                  utilHighlightEntities([d.id], true, context);
                }).on('mouseout', function () {
                  utilHighlightEntities([d.id], false, context);
                });
                var labelLink = label.append('span').attr('class', 'label-text').append('a').attr('href', '#').on('click', selectMember);
                labelLink.append('span').attr('class', 'member-entity-type').html(function (d) {
                  var matched = _mainPresetIndex.match(d.member, context.graph());
                  return matched && matched.name() || utilDisplayType(d.member.id);
                });
                labelLink.append('span').attr('class', 'member-entity-name').html(function (d) {
                  return utilDisplayName(d.member);
                });
                label.append('button').attr('title', _t('icons.remove')).attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete'));
                label.append('button').attr('class', 'member-zoom').attr('title', _t('icons.zoom_to')).call(svgIcon('#iD-icon-framed-dot', 'monochrome')).on('click', zoomToMember);
              } else {
                var labelText = label.append('span').attr('class', 'label-text');
                labelText.append('span').attr('class', 'member-entity-type').html(_t.html('inspector.' + d.type, {
                  id: d.id
                }));
                labelText.append('span').attr('class', 'member-entity-name').html(_t.html('inspector.incomplete', {
                  id: d.id
                }));
                label.append('button').attr('class', 'member-download').attr('title', _t('icons.download')).call(svgIcon('#iD-icon-load')).on('click', downloadMember);
              }
            });
            var wrapEnter = itemsEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
            wrapEnter.append('input').attr('class', 'member-role').attr('id', function (d) {
              return d.domId;
            }).property('type', 'text').attr('placeholder', _t('inspector.role')).call(utilNoAuto);

            if (taginfo) {
              wrapEnter.each(bindTypeahead);
            } // update


            items = items.merge(itemsEnter).order();
            items.select('input.member-role').property('value', function (d) {
              return d.role;
            }).on('blur', changeRole).on('change', changeRole);
            items.select('button.member-delete').on('click', deleteMember);
            var dragOrigin, targetIndex;
            items.call(d3_drag().on('start', function (d3_event) {
              dragOrigin = {
                x: d3_event.x,
                y: d3_event.y
              };
              targetIndex = null;
            }).on('drag', function (d3_event) {
              var x = d3_event.x - dragOrigin.x,
                  y = d3_event.y - dragOrigin.y;
              if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
              Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
              var index = items.nodes().indexOf(this);
              select(this).classed('dragging', true);
              targetIndex = null;
              selection.selectAll('li.member-row').style('transform', function (d2, index2) {
                var node = select(this).node();

                if (index === index2) {
                  return 'translate(' + x + 'px, ' + y + 'px)';
                } else if (index2 > index && d3_event.y > node.offsetTop) {
                  if (targetIndex === null || index2 > targetIndex) {
                    targetIndex = index2;
                  }

                  return 'translateY(-100%)';
                } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
                  if (targetIndex === null || index2 < targetIndex) {
                    targetIndex = index2;
                  }

                  return 'translateY(100%)';
                }

                return null;
              });
            }).on('end', function (d3_event, d) {
              if (!select(this).classed('dragging')) return;
              var index = items.nodes().indexOf(this);
              select(this).classed('dragging', false);
              selection.selectAll('li.member-row').style('transform', null);

              if (targetIndex !== null) {
                // dragged to a new position, reorder
                context.perform(actionMoveMember(d.relation.id, index, targetIndex), _t('operations.reorder_members.annotation'));
                context.validator().validate();
              }
            }));

            function bindTypeahead(d) {
              var row = select(this);
              var role = row.selectAll('input.member-role');
              var origValue = role.property('value');

              function sort(value, data) {
                var sameletter = [];
                var other = [];

                for (var i = 0; i < data.length; i++) {
                  if (data[i].value.substring(0, value.length) === value) {
                    sameletter.push(data[i]);
                  } else {
                    other.push(data[i]);
                  }
                }

                return sameletter.concat(other);
              }

              role.call(uiCombobox(context, 'member-role').fetcher(function (role, callback) {
                // The `geometry` param is used in the `taginfo.js` interface for
                // filtering results, as a key into the `tag_members_fractions`
                // object.  If we don't know the geometry because the member is
                // not yet downloaded, it's ok to guess based on type.
                var geometry;

                if (d.member) {
                  geometry = context.graph().geometry(d.member.id);
                } else if (d.type === 'relation') {
                  geometry = 'relation';
                } else if (d.type === 'way') {
                  geometry = 'line';
                } else {
                  geometry = 'point';
                }

                var rtype = entity.tags.type;
                taginfo.roles({
                  debounce: true,
                  rtype: rtype || '',
                  geometry: geometry,
                  query: role
                }, function (err, data) {
                  if (!err) callback(sort(role, data));
                });
              }).on('cancel', function () {
                role.property('value', origValue);
              }));
            }

            function unbind() {
              var row = select(this);
              row.selectAll('input.member-role').call(uiCombobox.off, context);
            }
          }

          section.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;
            _entityIDs = val;
            return section;
          };

          return section;
        }

        function actionDeleteMembers(relationId, memberIndexes) {
          return function (graph) {
            // Remove the members in descending order so removals won't shift what members
            // are at the remaining indexes
            memberIndexes.sort(function (a, b) {
              return b - a;
            });

            for (var i in memberIndexes) {
              graph = actionDeleteMember(relationId, memberIndexes[i])(graph);
            }

            return graph;
          };
        }

        function uiSectionRawMembershipEditor(context) {
          var section = uiSection('raw-membership-editor', context).shouldDisplay(function () {
            return _entityIDs && _entityIDs.length;
          }).label(function () {
            var parents = getSharedParentRelations();
            var gt = parents.length > _maxMemberships ? '>' : '';
            var count = gt + parents.slice(0, _maxMemberships).length;
            return _t('inspector.title_count', {
              title: _t.html('inspector.relations'),
              count: count
            });
          }).disclosureContent(renderDisclosureContent);
          var taginfo = services.taginfo;
          var nearbyCombo = uiCombobox(context, 'parent-relation').minItems(1).fetcher(fetchNearbyRelations).itemsMouseEnter(function (d3_event, d) {
            if (d.relation) utilHighlightEntities([d.relation.id], true, context);
          }).itemsMouseLeave(function (d3_event, d) {
            if (d.relation) utilHighlightEntities([d.relation.id], false, context);
          });
          var _inChange = false;
          var _entityIDs = [];

          var _showBlank;

          var _maxMemberships = 1000;

          function getSharedParentRelations() {
            var parents = [];

            for (var i = 0; i < _entityIDs.length; i++) {
              var entity = context.graph().hasEntity(_entityIDs[i]);
              if (!entity) continue;

              if (i === 0) {
                parents = context.graph().parentRelations(entity);
              } else {
                parents = utilArrayIntersection(parents, context.graph().parentRelations(entity));
              }

              if (!parents.length) break;
            }

            return parents;
          }

          function getMemberships() {
            var memberships = [];
            var relations = getSharedParentRelations().slice(0, _maxMemberships);
            var isMultiselect = _entityIDs.length > 1;
            var i, relation, membership, index, member, indexedMember;

            for (i = 0; i < relations.length; i++) {
              relation = relations[i];
              membership = {
                relation: relation,
                members: [],
                hash: osmEntity.key(relation)
              };

              for (index = 0; index < relation.members.length; index++) {
                member = relation.members[index];

                if (_entityIDs.indexOf(member.id) !== -1) {
                  indexedMember = Object.assign({}, member, {
                    index: index
                  });
                  membership.members.push(indexedMember);
                  membership.hash += ',' + index.toString();

                  if (!isMultiselect) {
                    // For single selections, list one entry per membership per relation.
                    // For multiselections, list one entry per relation.
                    memberships.push(membership);
                    membership = {
                      relation: relation,
                      members: [],
                      hash: osmEntity.key(relation)
                    };
                  }
                }
              }

              if (membership.members.length) memberships.push(membership);
            }

            memberships.forEach(function (membership) {
              membership.domId = utilUniqueDomId('membership-' + membership.relation.id);
              var roles = [];
              membership.members.forEach(function (member) {
                if (roles.indexOf(member.role) === -1) roles.push(member.role);
              });
              membership.role = roles.length === 1 ? roles[0] : roles;
            });
            return memberships;
          }

          function selectRelation(d3_event, d) {
            d3_event.preventDefault(); // remove the hover-highlight styling

            utilHighlightEntities([d.relation.id], false, context);
            context.enter(modeSelect(context, [d.relation.id]));
          }

          function zoomToRelation(d3_event, d) {
            d3_event.preventDefault();
            var entity = context.entity(d.relation.id);
            context.map().zoomToEase(entity); // highlight the relation in case it wasn't previously on-screen

            utilHighlightEntities([d.relation.id], true, context);
          }

          function changeRole(d3_event, d) {
            if (d === 0) return; // called on newrow (shouldn't happen)

            if (_inChange) return; // avoid accidental recursive call #5731

            var newRole = context.cleanRelationRole(select(this).property('value'));
            if (!newRole.trim() && typeof d.role !== 'string') return;
            var membersToUpdate = d.members.filter(function (member) {
              return member.role !== newRole;
            });

            if (membersToUpdate.length) {
              _inChange = true;
              context.perform(function actionChangeMemberRoles(graph) {
                membersToUpdate.forEach(function (member) {
                  var newMember = Object.assign({}, member, {
                    role: newRole
                  });
                  delete newMember.index;
                  graph = actionChangeMember(d.relation.id, newMember, member.index)(graph);
                });
                return graph;
              }, _t('operations.change_role.annotation', {
                n: membersToUpdate.length
              }));
              context.validator().validate();
            }

            _inChange = false;
          }

          function addMembership(d, role) {
            this.blur(); // avoid keeping focus on the button

            _showBlank = false;

            function actionAddMembers(relationId, ids, role) {
              return function (graph) {
                for (var i in ids) {
                  var member = {
                    id: ids[i],
                    type: graph.entity(ids[i]).type,
                    role: role
                  };
                  graph = actionAddMember(relationId, member)(graph);
                }

                return graph;
              };
            }

            if (d.relation) {
              context.perform(actionAddMembers(d.relation.id, _entityIDs, role), _t('operations.add_member.annotation', {
                n: _entityIDs.length
              }));
              context.validator().validate();
            } else {
              var relation = osmRelation();
              context.perform(actionAddEntity(relation), actionAddMembers(relation.id, _entityIDs, role), _t('operations.add.annotation.relation')); // changing the mode also runs `validate`

              context.enter(modeSelect(context, [relation.id]).newFeature(true));
            }
          }

          function deleteMembership(d3_event, d) {
            this.blur(); // avoid keeping focus on the button

            if (d === 0) return; // called on newrow (shouldn't happen)
            // remove the hover-highlight styling

            utilHighlightEntities([d.relation.id], false, context);
            var indexes = d.members.map(function (member) {
              return member.index;
            });
            context.perform(actionDeleteMembers(d.relation.id, indexes), _t('operations.delete_member.annotation', {
              n: _entityIDs.length
            }));
            context.validator().validate();
          }

          function fetchNearbyRelations(q, callback) {
            var newRelation = {
              relation: null,
              value: _t('inspector.new_relation'),
              display: _t.html('inspector.new_relation')
            };
            var entityID = _entityIDs[0];
            var result = [];
            var graph = context.graph();

            function baseDisplayLabel(entity) {
              var matched = _mainPresetIndex.match(entity, graph);
              var presetName = matched && matched.name() || _t('inspector.relation');
              var entityName = utilDisplayName(entity) || '';
              return presetName + ' ' + entityName;
            }

            var explicitRelation = q && context.hasEntity(q.toLowerCase());

            if (explicitRelation && explicitRelation.type === 'relation' && explicitRelation.id !== entityID) {
              // loaded relation is specified explicitly, only show that
              result.push({
                relation: explicitRelation,
                value: baseDisplayLabel(explicitRelation) + ' ' + explicitRelation.id
              });
            } else {
              context.history().intersects(context.map().extent()).forEach(function (entity) {
                if (entity.type !== 'relation' || entity.id === entityID) return;
                var value = baseDisplayLabel(entity);
                if (q && (value + ' ' + entity.id).toLowerCase().indexOf(q.toLowerCase()) === -1) return;
                result.push({
                  relation: entity,
                  value: value
                });
              });
              result.sort(function (a, b) {
                return osmRelation.creationOrder(a.relation, b.relation);
              }); // Dedupe identical names by appending relation id - see #2891

              var dupeGroups = Object.values(utilArrayGroupBy(result, 'value')).filter(function (v) {
                return v.length > 1;
              });
              dupeGroups.forEach(function (group) {
                group.forEach(function (obj) {
                  obj.value += ' ' + obj.relation.id;
                });
              });
            }

            result.forEach(function (obj) {
              obj.title = obj.value;
            });
            result.unshift(newRelation);
            callback(result);
          }

          function renderDisclosureContent(selection) {
            var memberships = getMemberships();
            var list = selection.selectAll('.member-list').data([0]);
            list = list.enter().append('ul').attr('class', 'member-list').merge(list);
            var items = list.selectAll('li.member-row-normal').data(memberships, function (d) {
              return d.hash;
            });
            items.exit().each(unbind).remove(); // Enter

            var itemsEnter = items.enter().append('li').attr('class', 'member-row member-row-normal form-field'); // highlight the relation in the map while hovering on the list item

            itemsEnter.on('mouseover', function (d3_event, d) {
              utilHighlightEntities([d.relation.id], true, context);
            }).on('mouseout', function (d3_event, d) {
              utilHighlightEntities([d.relation.id], false, context);
            });
            var labelEnter = itemsEnter.append('label').attr('class', 'field-label').attr('for', function (d) {
              return d.domId;
            });
            var labelLink = labelEnter.append('span').attr('class', 'label-text').append('a').attr('href', '#').on('click', selectRelation);
            labelLink.append('span').attr('class', 'member-entity-type').html(function (d) {
              var matched = _mainPresetIndex.match(d.relation, context.graph());
              return matched && matched.name() || _t('inspector.relation');
            });
            labelLink.append('span').attr('class', 'member-entity-name').html(function (d) {
              return utilDisplayName(d.relation);
            });
            labelEnter.append('button').attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete')).on('click', deleteMembership);
            labelEnter.append('button').attr('class', 'member-zoom').attr('title', _t('icons.zoom_to')).call(svgIcon('#iD-icon-framed-dot', 'monochrome')).on('click', zoomToRelation);
            var wrapEnter = itemsEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
            wrapEnter.append('input').attr('class', 'member-role').attr('id', function (d) {
              return d.domId;
            }).property('type', 'text').property('value', function (d) {
              return typeof d.role === 'string' ? d.role : '';
            }).attr('title', function (d) {
              return Array.isArray(d.role) ? d.role.filter(Boolean).join('\n') : d.role;
            }).attr('placeholder', function (d) {
              return Array.isArray(d.role) ? _t('inspector.multiple_roles') : _t('inspector.role');
            }).classed('mixed', function (d) {
              return Array.isArray(d.role);
            }).call(utilNoAuto).on('blur', changeRole).on('change', changeRole);

            if (taginfo) {
              wrapEnter.each(bindTypeahead);
            }

            var newMembership = list.selectAll('.member-row-new').data(_showBlank ? [0] : []); // Exit

            newMembership.exit().remove(); // Enter

            var newMembershipEnter = newMembership.enter().append('li').attr('class', 'member-row member-row-new form-field');
            var newLabelEnter = newMembershipEnter.append('label').attr('class', 'field-label');
            newLabelEnter.append('input').attr('placeholder', _t('inspector.choose_relation')).attr('type', 'text').attr('class', 'member-entity-input').call(utilNoAuto);
            newLabelEnter.append('button').attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete')).on('click', function () {
              list.selectAll('.member-row-new').remove();
            });
            var newWrapEnter = newMembershipEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
            newWrapEnter.append('input').attr('class', 'member-role').property('type', 'text').attr('placeholder', _t('inspector.role')).call(utilNoAuto); // Update

            newMembership = newMembership.merge(newMembershipEnter);
            newMembership.selectAll('.member-entity-input').on('blur', cancelEntity) // if it wasn't accepted normally, cancel it
            .call(nearbyCombo.on('accept', acceptEntity).on('cancel', cancelEntity)); // Container for the Add button

            var addRow = selection.selectAll('.add-row').data([0]); // enter

            var addRowEnter = addRow.enter().append('div').attr('class', 'add-row');
            var addRelationButton = addRowEnter.append('button').attr('class', 'add-relation');
            addRelationButton.call(svgIcon('#iD-icon-plus', 'light'));
            addRelationButton.call(uiTooltip().title(_t.html('inspector.add_to_relation')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left'));
            addRowEnter.append('div').attr('class', 'space-value'); // preserve space

            addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
            // update

            addRow = addRow.merge(addRowEnter);
            addRow.select('.add-relation').on('click', function () {
              _showBlank = true;
              section.reRender();
              list.selectAll('.member-entity-input').node().focus();
            });

            function acceptEntity(d) {
              if (!d) {
                cancelEntity();
                return;
              } // remove hover-higlighting


              if (d.relation) utilHighlightEntities([d.relation.id], false, context);
              var role = context.cleanRelationRole(list.selectAll('.member-row-new .member-role').property('value'));
              addMembership(d, role);
            }

            function cancelEntity() {
              var input = newMembership.selectAll('.member-entity-input');
              input.property('value', ''); // remove hover-higlighting

              context.surface().selectAll('.highlighted').classed('highlighted', false);
            }

            function bindTypeahead(d) {
              var row = select(this);
              var role = row.selectAll('input.member-role');
              var origValue = role.property('value');

              function sort(value, data) {
                var sameletter = [];
                var other = [];

                for (var i = 0; i < data.length; i++) {
                  if (data[i].value.substring(0, value.length) === value) {
                    sameletter.push(data[i]);
                  } else {
                    other.push(data[i]);
                  }
                }

                return sameletter.concat(other);
              }

              role.call(uiCombobox(context, 'member-role').fetcher(function (role, callback) {
                var rtype = d.relation.tags.type;
                taginfo.roles({
                  debounce: true,
                  rtype: rtype || '',
                  geometry: context.graph().geometry(_entityIDs[0]),
                  query: role
                }, function (err, data) {
                  if (!err) callback(sort(role, data));
                });
              }).on('cancel', function () {
                role.property('value', origValue);
              }));
            }

            function unbind() {
              var row = select(this);
              row.selectAll('input.member-role').call(uiCombobox.off, context);
            }
          }

          section.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;
            _entityIDs = val;
            _showBlank = false;
            return section;
          };

          return section;
        }

        function uiSectionSelectionList(context) {
          var _selectedIDs = [];
          var section = uiSection('selected-features', context).shouldDisplay(function () {
            return _selectedIDs.length > 1;
          }).label(function () {
            return _t('inspector.title_count', {
              title: _t.html('inspector.features'),
              count: _selectedIDs.length
            });
          }).disclosureContent(renderDisclosureContent);
          context.history().on('change.selectionList', function (difference) {
            if (difference) {
              section.reRender();
            }
          });

          section.entityIDs = function (val) {
            if (!arguments.length) return _selectedIDs;
            _selectedIDs = val;
            return section;
          };

          function selectEntity(d3_event, entity) {
            context.enter(modeSelect(context, [entity.id]));
          }

          function deselectEntity(d3_event, entity) {
            var selectedIDs = _selectedIDs.slice();

            var index = selectedIDs.indexOf(entity.id);

            if (index > -1) {
              selectedIDs.splice(index, 1);
              context.enter(modeSelect(context, selectedIDs));
            }
          }

          function renderDisclosureContent(selection) {
            var list = selection.selectAll('.feature-list').data([0]);
            list = list.enter().append('ul').attr('class', 'feature-list').merge(list);

            var entities = _selectedIDs.map(function (id) {
              return context.hasEntity(id);
            }).filter(Boolean);

            var items = list.selectAll('.feature-list-item').data(entities, osmEntity.key);
            items.exit().remove(); // Enter

            var enter = items.enter().append('li').attr('class', 'feature-list-item').each(function (d) {
              select(this).on('mouseover', function () {
                utilHighlightEntities([d.id], true, context);
              }).on('mouseout', function () {
                utilHighlightEntities([d.id], false, context);
              });
            });
            var label = enter.append('button').attr('class', 'label').on('click', selectEntity);
            label.append('span').attr('class', 'entity-geom-icon').call(svgIcon('', 'pre-text'));
            label.append('span').attr('class', 'entity-type');
            label.append('span').attr('class', 'entity-name');
            enter.append('button').attr('class', 'close').attr('title', _t('icons.deselect')).on('click', deselectEntity).call(svgIcon('#iD-icon-close')); // Update

            items = items.merge(enter);
            items.selectAll('.entity-geom-icon use').attr('href', function () {
              var entity = this.parentNode.parentNode.__data__;
              return '#iD-icon-' + entity.geometry(context.graph());
            });
            items.selectAll('.entity-type').html(function (entity) {
              return _mainPresetIndex.match(entity, context.graph()).name();
            });
            items.selectAll('.entity-name').html(function (d) {
              // fetch latest entity
              var entity = context.entity(d.id);
              return utilDisplayName(entity);
            });
          }

          return section;
        }

        function uiEntityEditor(context) {
          var dispatch = dispatch$8('choose');
          var _state = 'select';
          var _coalesceChanges = false;
          var _modified = false;

          var _base;

          var _entityIDs;

          var _activePresets = [];

          var _newFeature;

          var _sections;

          function entityEditor(selection) {
            var combinedTags = utilCombinedTags(_entityIDs, context.graph()); // Header

            var header = selection.selectAll('.header').data([0]); // Enter

            var headerEnter = header.enter().append('div').attr('class', 'header fillL');
            headerEnter.append('button').attr('class', 'preset-reset preset-choose').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-forward' : '#iD-icon-backward'));
            headerEnter.append('button').attr('class', 'close').on('click', function () {
              context.enter(modeBrowse(context));
            }).call(svgIcon(_modified ? '#iD-icon-apply' : '#iD-icon-close'));
            headerEnter.append('h3'); // Update

            header = header.merge(headerEnter);
            header.selectAll('h3').html(_entityIDs.length === 1 ? _t.html('inspector.edit') : _t.html('inspector.edit_features'));
            header.selectAll('.preset-reset').on('click', function () {
              dispatch.call('choose', this, _activePresets);
            }); // Body

            var body = selection.selectAll('.inspector-body').data([0]); // Enter

            var bodyEnter = body.enter().append('div').attr('class', 'entity-editor inspector-body sep-top'); // Update

            body = body.merge(bodyEnter);

            if (!_sections) {
              _sections = [uiSectionSelectionList(context), uiSectionFeatureType(context).on('choose', function (presets) {
                dispatch.call('choose', this, presets);
              }), uiSectionEntityIssues(context), uiSectionPresetFields(context).on('change', changeTags).on('revert', revertTags), uiSectionRawTagEditor('raw-tag-editor', context).on('change', changeTags), uiSectionRawMemberEditor(context), uiSectionRawMembershipEditor(context)];
            }

            _sections.forEach(function (section) {
              if (section.entityIDs) {
                section.entityIDs(_entityIDs);
              }

              if (section.presets) {
                section.presets(_activePresets);
              }

              if (section.tags) {
                section.tags(combinedTags);
              }

              if (section.state) {
                section.state(_state);
              }

              body.call(section.render);
            });

            context.history().on('change.entity-editor', historyChanged);

            function historyChanged(difference) {
              if (selection.selectAll('.entity-editor').empty()) return;
              if (_state === 'hide') return;
              var significant = !difference || difference.didChange.properties || difference.didChange.addition || difference.didChange.deletion;
              if (!significant) return;
              _entityIDs = _entityIDs.filter(context.hasEntity);
              if (!_entityIDs.length) return;
              var priorActivePreset = _activePresets.length === 1 && _activePresets[0];
              loadActivePresets();
              var graph = context.graph();
              entityEditor.modified(_base !== graph);
              entityEditor(selection);

              if (priorActivePreset && _activePresets.length === 1 && priorActivePreset !== _activePresets[0]) {
                // flash the button to indicate the preset changed
                context.container().selectAll('.entity-editor button.preset-reset .label').style('background-color', '#fff').transition().duration(750).style('background-color', null);
              }
            }
          } // Tag changes that fire on input can all get coalesced into a single
          // history operation when the user leaves the field.  #2342
          // Use explicit entityIDs in case the selection changes before the event is fired.


          function changeTags(entityIDs, changed, onInput) {
            var actions = [];

            for (var i in entityIDs) {
              var entityID = entityIDs[i];
              var entity = context.entity(entityID);
              var tags = Object.assign({}, entity.tags); // shallow copy

              for (var k in changed) {
                if (!k) continue;
                var v = changed[k];

                if (v !== undefined || tags.hasOwnProperty(k)) {
                  tags[k] = v;
                }
              }

              if (!onInput) {
                tags = utilCleanTags(tags);
              }

              if (!fastDeepEqual(entity.tags, tags)) {
                actions.push(actionChangeTags(entityID, tags));
              }
            }

            if (actions.length) {
              var combinedAction = function combinedAction(graph) {
                actions.forEach(function (action) {
                  graph = action(graph);
                });
                return graph;
              };

              var annotation = _t('operations.change_tags.annotation');

              if (_coalesceChanges) {
                context.overwrite(combinedAction, annotation);
              } else {
                context.perform(combinedAction, annotation);
                _coalesceChanges = !!onInput;
              }
            } // if leaving field (blur event), rerun validation


            if (!onInput) {
              context.validator().validate();
            }
          }

          function revertTags(keys) {
            var actions = [];

            for (var i in _entityIDs) {
              var entityID = _entityIDs[i];
              var original = context.graph().base().entities[entityID];
              var changed = {};

              for (var j in keys) {
                var key = keys[j];
                changed[key] = original ? original.tags[key] : undefined;
              }

              var entity = context.entity(entityID);
              var tags = Object.assign({}, entity.tags); // shallow copy

              for (var k in changed) {
                if (!k) continue;
                var v = changed[k];

                if (v !== undefined || tags.hasOwnProperty(k)) {
                  tags[k] = v;
                }
              }

              tags = utilCleanTags(tags);

              if (!fastDeepEqual(entity.tags, tags)) {
                actions.push(actionChangeTags(entityID, tags));
              }
            }

            if (actions.length) {
              var combinedAction = function combinedAction(graph) {
                actions.forEach(function (action) {
                  graph = action(graph);
                });
                return graph;
              };

              var annotation = _t('operations.change_tags.annotation');

              if (_coalesceChanges) {
                context.overwrite(combinedAction, annotation);
              } else {
                context.perform(combinedAction, annotation);
                _coalesceChanges = false;
              }
            }

            context.validator().validate();
          }

          entityEditor.modified = function (val) {
            if (!arguments.length) return _modified;
            _modified = val;
            return entityEditor;
          };

          entityEditor.state = function (val) {
            if (!arguments.length) return _state;
            _state = val;
            return entityEditor;
          };

          entityEditor.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs; // always reload these even if the entityIDs are unchanged, since we
            // could be reselecting after something like dragging a node

            _base = context.graph();
            _coalesceChanges = false;
            if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) return entityEditor; // exit early if no change

            _entityIDs = val;
            loadActivePresets(true);
            return entityEditor.modified(false);
          };

          entityEditor.newFeature = function (val) {
            if (!arguments.length) return _newFeature;
            _newFeature = val;
            return entityEditor;
          };

          function loadActivePresets(isForNewSelection) {
            var graph = context.graph();
            var counts = {};

            for (var i in _entityIDs) {
              var entity = graph.hasEntity(_entityIDs[i]);
              if (!entity) return;
              var match = _mainPresetIndex.match(entity, graph);
              if (!counts[match.id]) counts[match.id] = 0;
              counts[match.id] += 1;
            }

            var matches = Object.keys(counts).sort(function (p1, p2) {
              return counts[p2] - counts[p1];
            }).map(function (pID) {
              return _mainPresetIndex.item(pID);
            });

            if (!isForNewSelection) {
              // A "weak" preset doesn't set any tags. (e.g. "Address")
              var weakPreset = _activePresets.length === 1 && !_activePresets[0].isFallback() && Object.keys(_activePresets[0].addTags || {}).length === 0; // Don't replace a weak preset with a fallback preset (e.g. "Point")

              if (weakPreset && matches.length === 1 && matches[0].isFallback()) return;
            }

            entityEditor.presets(matches);
          }

          entityEditor.presets = function (val) {
            if (!arguments.length) return _activePresets; // don't reload the same preset

            if (!utilArrayIdentical(val, _activePresets)) {
              _activePresets = val;
            }

            return entityEditor;
          };

          return utilRebind(entityEditor, dispatch, 'on');
        }

        function uiPresetList(context) {
          var dispatch = dispatch$8('cancel', 'choose');

          var _entityIDs;

          var _currLoc;

          var _currentPresets;

          var _autofocus = false;

          function presetList(selection) {
            if (!_entityIDs) return;
            var presets = _mainPresetIndex.matchAllGeometry(entityGeometries());
            selection.html('');
            var messagewrap = selection.append('div').attr('class', 'header fillL');
            var message = messagewrap.append('h3').html(_t.html('inspector.choose'));
            messagewrap.append('button').attr('class', 'preset-choose').on('click', function () {
              dispatch.call('cancel', this);
            }).call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'));

            function initialKeydown(d3_event) {
              // hack to let delete shortcut work when search is autofocused
              if (search.property('value').length === 0 && (d3_event.keyCode === utilKeybinding.keyCodes['⌫'] || d3_event.keyCode === utilKeybinding.keyCodes['⌦'])) {
                d3_event.preventDefault();
                d3_event.stopPropagation();
                operationDelete(context, _entityIDs)(); // hack to let undo work when search is autofocused
              } else if (search.property('value').length === 0 && (d3_event.ctrlKey || d3_event.metaKey) && d3_event.keyCode === utilKeybinding.keyCodes.z) {
                d3_event.preventDefault();
                d3_event.stopPropagation();
                context.undo();
              } else if (!d3_event.ctrlKey && !d3_event.metaKey) {
                // don't check for delete/undo hack on future keydown events
                select(this).on('keydown', keydown);
                keydown.call(this, d3_event);
              }
            }

            function keydown(d3_event) {
              // down arrow
              if (d3_event.keyCode === utilKeybinding.keyCodes['↓'] && // if insertion point is at the end of the string
              search.node().selectionStart === search.property('value').length) {
                d3_event.preventDefault();
                d3_event.stopPropagation(); // move focus to the first item in the preset list

                var buttons = list.selectAll('.preset-list-button');
                if (!buttons.empty()) buttons.nodes()[0].focus();
              }
            }

            function keypress(d3_event) {
              // enter
              var value = search.property('value');

              if (d3_event.keyCode === 13 && // ↩ Return
              value.length) {
                list.selectAll('.preset-list-item:first-child').each(function (d) {
                  d.choose.call(this);
                });
              }
            }

            function inputevent() {
              var value = search.property('value');
              list.classed('filtered', value.length);
              var results, messageText;

              if (value.length) {
                results = presets.search(value, entityGeometries()[0], _currLoc);
                messageText = _t('inspector.results', {
                  n: results.collection.length,
                  search: value
                });
              } else {
                results = _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro(), _currLoc);
                messageText = _t('inspector.choose');
              }

              list.call(drawList, results);
              message.html(messageText);
            }

            var searchWrap = selection.append('div').attr('class', 'search-header');
            searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
            var search = searchWrap.append('input').attr('class', 'preset-search-input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keydown', initialKeydown).on('keypress', keypress).on('input', inputevent);

            if (_autofocus) {
              search.node().focus(); // Safari 14 doesn't always like to focus immediately,
              // so try again on the next pass

              setTimeout(function () {
                search.node().focus();
              }, 0);
            }

            var listWrap = selection.append('div').attr('class', 'inspector-body');
            var list = listWrap.append('div').attr('class', 'preset-list').call(drawList, _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro(), _currLoc));
            context.features().on('change.preset-list', updateForFeatureHiddenState);
          }

          function drawList(list, presets) {
            presets = presets.matchAllGeometry(entityGeometries());
            var collection = presets.collection.reduce(function (collection, preset) {
              if (!preset) return collection;

              if (preset.members) {
                if (preset.members.collection.filter(function (preset) {
                  return preset.addable();
                }).length > 1) {
                  collection.push(CategoryItem(preset));
                }
              } else if (preset.addable()) {
                collection.push(PresetItem(preset));
              }

              return collection;
            }, []);
            var items = list.selectAll('.preset-list-item').data(collection, function (d) {
              return d.preset.id;
            });
            items.order();
            items.exit().remove();
            items.enter().append('div').attr('class', function (item) {
              return 'preset-list-item preset-' + item.preset.id.replace('/', '-');
            }).classed('current', function (item) {
              return _currentPresets.indexOf(item.preset) !== -1;
            }).each(function (item) {
              select(this).call(item);
            }).style('opacity', 0).transition().style('opacity', 1);
            updateForFeatureHiddenState();
          }

          function itemKeydown(d3_event) {
            // the actively focused item
            var item = select(this.closest('.preset-list-item'));
            var parentItem = select(item.node().parentNode.closest('.preset-list-item')); // arrow down, move focus to the next, lower item

            if (d3_event.keyCode === utilKeybinding.keyCodes['↓']) {
              d3_event.preventDefault();
              d3_event.stopPropagation(); // the next item in the list at the same level

              var nextItem = select(item.node().nextElementSibling); // if there is no next item in this list

              if (nextItem.empty()) {
                // if there is a parent item
                if (!parentItem.empty()) {
                  // the item is the last item of a sublist,
                  // select the next item at the parent level
                  nextItem = select(parentItem.node().nextElementSibling);
                } // if the focused item is expanded

              } else if (select(this).classed('expanded')) {
                // select the first subitem instead
                nextItem = item.select('.subgrid .preset-list-item:first-child');
              }

              if (!nextItem.empty()) {
                // focus on the next item
                nextItem.select('.preset-list-button').node().focus();
              } // arrow up, move focus to the previous, higher item

            } else if (d3_event.keyCode === utilKeybinding.keyCodes['↑']) {
              d3_event.preventDefault();
              d3_event.stopPropagation(); // the previous item in the list at the same level

              var previousItem = select(item.node().previousElementSibling); // if there is no previous item in this list

              if (previousItem.empty()) {
                // if there is a parent item
                if (!parentItem.empty()) {
                  // the item is the first subitem of a sublist select the parent item
                  previousItem = parentItem;
                } // if the previous item is expanded

              } else if (previousItem.select('.preset-list-button').classed('expanded')) {
                // select the last subitem of the sublist of the previous item
                previousItem = previousItem.select('.subgrid .preset-list-item:last-child');
              }

              if (!previousItem.empty()) {
                // focus on the previous item
                previousItem.select('.preset-list-button').node().focus();
              } else {
                // the focus is at the top of the list, move focus back to the search field
                var search = select(this.closest('.preset-list-pane')).select('.preset-search-input');
                search.node().focus();
              } // arrow left, move focus to the parent item if there is one

            } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
              d3_event.preventDefault();
              d3_event.stopPropagation(); // if there is a parent item, focus on the parent item

              if (!parentItem.empty()) {
                parentItem.select('.preset-list-button').node().focus();
              } // arrow right, choose this item

            } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
              d3_event.preventDefault();
              d3_event.stopPropagation();
              item.datum().choose.call(select(this).node());
            }
          }

          function CategoryItem(preset) {
            var box,
                sublist,
                shown = false;

            function item(selection) {
              var wrap = selection.append('div').attr('class', 'preset-list-button-wrap category');

              function click() {
                var isExpanded = select(this).classed('expanded');
                var iconName = isExpanded ? _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward' : '#iD-icon-down';
                select(this).classed('expanded', !isExpanded);
                select(this).selectAll('div.label-inner svg.icon use').attr('href', iconName);
                item.choose();
              }

              var geometries = entityGeometries();
              var button = wrap.append('button').attr('class', 'preset-list-button').classed('expanded', false).call(uiPresetIcon().geometry(geometries.length === 1 && geometries[0]).preset(preset)).on('click', click).on('keydown', function (d3_event) {
                // right arrow, expand the focused item
                if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
                  d3_event.preventDefault();
                  d3_event.stopPropagation(); // if the item isn't expanded

                  if (!select(this).classed('expanded')) {
                    // toggle expansion (expand the item)
                    click.call(this, d3_event);
                  } // left arrow, collapse the focused item

                } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
                  d3_event.preventDefault();
                  d3_event.stopPropagation(); // if the item is expanded

                  if (select(this).classed('expanded')) {
                    // toggle expansion (collapse the item)
                    click.call(this, d3_event);
                  }
                } else {
                  itemKeydown.call(this, d3_event);
                }
              });
              var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
              label.append('div').attr('class', 'namepart').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline')).append('span').html(function () {
                return preset.nameLabel() + '&hellip;';
              });
              box = selection.append('div').attr('class', 'subgrid').style('max-height', '0px').style('opacity', 0);
              box.append('div').attr('class', 'arrow');
              sublist = box.append('div').attr('class', 'preset-list fillL3');
            }

            item.choose = function () {
              if (!box || !sublist) return;

              if (shown) {
                shown = false;
                box.transition().duration(200).style('opacity', '0').style('max-height', '0px').style('padding-bottom', '0px');
              } else {
                shown = true;
                var members = preset.members.matchAllGeometry(entityGeometries());
                sublist.call(drawList, members);
                box.transition().duration(200).style('opacity', '1').style('max-height', 200 + members.collection.length * 190 + 'px').style('padding-bottom', '10px');
              }
            };

            item.preset = preset;
            return item;
          }

          function PresetItem(preset) {
            function item(selection) {
              var wrap = selection.append('div').attr('class', 'preset-list-button-wrap');
              var geometries = entityGeometries();
              var button = wrap.append('button').attr('class', 'preset-list-button').call(uiPresetIcon().geometry(geometries.length === 1 && geometries[0]).preset(preset)).on('click', item.choose).on('keydown', itemKeydown);
              var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
              var nameparts = [preset.nameLabel(), preset.subtitleLabel()].filter(Boolean);
              label.selectAll('.namepart').data(nameparts).enter().append('div').attr('class', 'namepart').html(function (d) {
                return d;
              });
              wrap.call(item.reference.button);
              selection.call(item.reference.body);
            }

            item.choose = function () {
              if (select(this).classed('disabled')) return;

              if (!context.inIntro()) {
                _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
              }

              context.perform(function (graph) {
                for (var i in _entityIDs) {
                  var entityID = _entityIDs[i];
                  var oldPreset = _mainPresetIndex.match(graph.entity(entityID), graph);
                  graph = actionChangePreset(entityID, oldPreset, preset)(graph);
                }

                return graph;
              }, _t('operations.change_tags.annotation'));
              context.validator().validate(); // rerun validation

              dispatch.call('choose', this, preset);
            };

            item.help = function (d3_event) {
              d3_event.stopPropagation();
              item.reference.toggle();
            };

            item.preset = preset;
            item.reference = uiTagReference(preset.reference());
            return item;
          }

          function updateForFeatureHiddenState() {
            if (!_entityIDs.every(context.hasEntity)) return;
            var geometries = entityGeometries();
            var button = context.container().selectAll('.preset-list .preset-list-button'); // remove existing tooltips

            button.call(uiTooltip().destroyAny);
            button.each(function (item, index) {
              var hiddenPresetFeaturesId;

              for (var i in geometries) {
                hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
                if (hiddenPresetFeaturesId) break;
              }

              var isHiddenPreset = !context.inIntro() && !!hiddenPresetFeaturesId && (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
              select(this).classed('disabled', isHiddenPreset);

              if (isHiddenPreset) {
                var isAutoHidden = context.features().autoHidden(hiddenPresetFeaturesId);
                select(this).call(uiTooltip().title(_t.html('inspector.hidden_preset.' + (isAutoHidden ? 'zoom' : 'manual'), {
                  features: _t.html('feature.' + hiddenPresetFeaturesId + '.description')
                })).placement(index < 2 ? 'bottom' : 'top'));
              }
            });
          }

          presetList.autofocus = function (val) {
            if (!arguments.length) return _autofocus;
            _autofocus = val;
            return presetList;
          };

          presetList.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;
            _entityIDs = val;
            _currLoc = null;

            if (_entityIDs && _entityIDs.length) {
              // calculate current location
              var extent = _entityIDs.reduce(function (extent, entityID) {
                var entity = context.graph().entity(entityID);
                return extent.extend(entity.extent(context.graph()));
              }, geoExtent());

              _currLoc = extent.center(); // match presets

              var presets = _entityIDs.map(function (entityID) {
                return _mainPresetIndex.match(context.entity(entityID), context.graph());
              });

              presetList.presets(presets);
            }

            return presetList;
          };

          presetList.presets = function (val) {
            if (!arguments.length) return _currentPresets;
            _currentPresets = val;
            return presetList;
          };

          function entityGeometries() {
            var counts = {};

            for (var i in _entityIDs) {
              var entityID = _entityIDs[i];
              var entity = context.entity(entityID);
              var geometry = entity.geometry(context.graph()); // Treat entities on addr:interpolation lines as points, not vertices (#3241)

              if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
                geometry = 'point';
              }

              if (!counts[geometry]) counts[geometry] = 0;
              counts[geometry] += 1;
            }

            return Object.keys(counts).sort(function (geom1, geom2) {
              return counts[geom2] - counts[geom1];
            });
          }

          return utilRebind(presetList, dispatch, 'on');
        }

        function uiViewOnOSM(context) {
          var _what; // an osmEntity or osmNote


          function viewOnOSM(selection) {
            var url;

            if (_what instanceof osmEntity) {
              url = context.connection().entityURL(_what);
            } else if (_what instanceof osmNote) {
              url = context.connection().noteURL(_what);
            }

            var data = !_what || _what.isNew() ? [] : [_what];
            var link = selection.selectAll('.view-on-osm').data(data, function (d) {
              return d.id;
            }); // exit

            link.exit().remove(); // enter

            var linkEnter = link.enter().append('a').attr('class', 'view-on-osm').attr('target', '_blank').attr('href', url).call(svgIcon('#iD-icon-out-link', 'inline'));
            linkEnter.append('span').html(_t.html('inspector.view_on_osm'));
          }

          viewOnOSM.what = function (_) {
            if (!arguments.length) return _what;
            _what = _;
            return viewOnOSM;
          };

          return viewOnOSM;
        }

        function uiInspector(context) {
          var presetList = uiPresetList(context);
          var entityEditor = uiEntityEditor(context);
          var wrap = select(null),
              presetPane = select(null),
              editorPane = select(null);
          var _state = 'select';

          var _entityIDs;

          var _newFeature = false;

          function inspector(selection) {
            presetList.entityIDs(_entityIDs).autofocus(_newFeature).on('choose', inspector.setPreset).on('cancel', function () {
              inspector.setPreset();
            });
            entityEditor.state(_state).entityIDs(_entityIDs).on('choose', inspector.showList);
            wrap = selection.selectAll('.panewrap').data([0]);
            var enter = wrap.enter().append('div').attr('class', 'panewrap');
            enter.append('div').attr('class', 'preset-list-pane pane');
            enter.append('div').attr('class', 'entity-editor-pane pane');
            wrap = wrap.merge(enter);
            presetPane = wrap.selectAll('.preset-list-pane');
            editorPane = wrap.selectAll('.entity-editor-pane');

            function shouldDefaultToPresetList() {
              // always show the inspector on hover
              if (_state !== 'select') return false; // can only change preset on single selection

              if (_entityIDs.length !== 1) return false;
              var entityID = _entityIDs[0];
              var entity = context.hasEntity(entityID);
              if (!entity) return false; // default to inspector if there are already tags

              if (entity.hasNonGeometryTags()) return false; // prompt to select preset if feature is new and untagged

              if (_newFeature) return true; // all existing features except vertices should default to inspector

              if (entity.geometry(context.graph()) !== 'vertex') return false; // show vertex relations if any

              if (context.graph().parentRelations(entity).length) return false; // show vertex issues if there are any

              if (context.validator().getEntityIssues(entityID).length) return false; // show turn retriction editor for junction vertices

              if (entity.isHighwayIntersection(context.graph())) return false; // otherwise show preset list for uninteresting vertices

              return true;
            }

            if (shouldDefaultToPresetList()) {
              wrap.style('right', '-100%');
              editorPane.classed('hide', true);
              presetPane.classed('hide', false).call(presetList);
            } else {
              wrap.style('right', '0%');
              presetPane.classed('hide', true);
              editorPane.classed('hide', false).call(entityEditor);
            }

            var footer = selection.selectAll('.footer').data([0]);
            footer = footer.enter().append('div').attr('class', 'footer').merge(footer);
            footer.call(uiViewOnOSM(context).what(context.hasEntity(_entityIDs.length === 1 && _entityIDs[0])));
          }

          inspector.showList = function (presets) {
            presetPane.classed('hide', false);
            wrap.transition().styleTween('right', function () {
              return interpolate$1('0%', '-100%');
            }).on('end', function () {
              editorPane.classed('hide', true);
            });

            if (presets) {
              presetList.presets(presets);
            }

            presetPane.call(presetList.autofocus(true));
          };

          inspector.setPreset = function (preset) {
            // upon setting multipolygon, go to the area preset list instead of the editor
            if (preset && preset.id === 'type/multipolygon') {
              presetPane.call(presetList.autofocus(true));
            } else {
              editorPane.classed('hide', false);
              wrap.transition().styleTween('right', function () {
                return interpolate$1('-100%', '0%');
              }).on('end', function () {
                presetPane.classed('hide', true);
              });

              if (preset) {
                entityEditor.presets([preset]);
              }

              editorPane.call(entityEditor);
            }
          };

          inspector.state = function (val) {
            if (!arguments.length) return _state;
            _state = val;
            entityEditor.state(_state); // remove any old field help overlay that might have gotten attached to the inspector

            context.container().selectAll('.field-help-body').remove();
            return inspector;
          };

          inspector.entityIDs = function (val) {
            if (!arguments.length) return _entityIDs;
            _entityIDs = val;
            return inspector;
          };

          inspector.newFeature = function (val) {
            if (!arguments.length) return _newFeature;
            _newFeature = val;
            return inspector;
          };

          return inspector;
        }

        function uiImproveOsmComments() {
          var _qaItem;

          function issueComments(selection) {
            // make the div immediately so it appears above the buttons
            var comments = selection.selectAll('.comments-container').data([0]);
            comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments); // must retrieve comments from API before they can be displayed

            services.improveOSM.getComments(_qaItem).then(function (d) {
              if (!d.comments) return; // nothing to do here

              var commentEnter = comments.selectAll('.comment').data(d.comments).enter().append('div').attr('class', 'comment');
              commentEnter.append('div').attr('class', 'comment-avatar').call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
              var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
              var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
              metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
                var osm = services.osm;
                var selection = select(this);

                if (osm && d.username) {
                  selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.username)).attr('target', '_blank');
                }

                selection.html(function (d) {
                  return d.username;
                });
              });
              metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
                return _t.html('note.status.commented', {
                  when: localeDateString(d.timestamp)
                });
              });
              mainEnter.append('div').attr('class', 'comment-text').append('p').html(function (d) {
                return d.text;
              });
            })["catch"](function (err) {
              console.log(err); // eslint-disable-line no-console
            });
          }

          function localeDateString(s) {
            if (!s) return null;
            var options = {
              day: 'numeric',
              month: 'short',
              year: 'numeric'
            };
            var d = new Date(s * 1000); // timestamp is served in seconds, date takes ms

            if (isNaN(d.getTime())) return null;
            return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
          }

          issueComments.issue = function (val) {
            if (!arguments.length) return _qaItem;
            _qaItem = val;
            return issueComments;
          };

          return issueComments;
        }

        function uiImproveOsmDetails(context) {
          var _qaItem;

          function issueDetail(d) {
            if (d.desc) return d.desc;
            var issueKey = d.issueKey;
            d.replacements = d.replacements || {};
            d.replacements["default"] = _t.html('inspector.unknown'); // special key `default` works as a fallback string

            return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".description"), d.replacements);
          }

          function improveOsmDetails(selection) {
            var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
              return "".concat(d.id, "-").concat(d.status || 0);
            });
            details.exit().remove();
            var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description

            var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
            descriptionEnter.append('h4').html(_t.html('QA.keepRight.detail_description'));
            descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..

            var relatedEntities = [];
            descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
              var link = select(this);
              var isObjectLink = link.classed('error_object_link');
              var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
              var entity = context.hasEntity(entityID);
              relatedEntities.push(entityID); // Add click handler

              link.on('mouseenter', function () {
                utilHighlightEntities([entityID], true, context);
              }).on('mouseleave', function () {
                utilHighlightEntities([entityID], false, context);
              }).on('click', function (d3_event) {
                d3_event.preventDefault();
                utilHighlightEntities([entityID], false, context);
                var osmlayer = context.layers().layer('osm');

                if (!osmlayer.enabled()) {
                  osmlayer.enabled(true);
                }

                context.map().centerZoom(_qaItem.loc, 20);

                if (entity) {
                  context.enter(modeSelect(context, [entityID]));
                } else {
                  context.loadEntity(entityID, function (err, result) {
                    if (err) return;
                    var entity = result.data.find(function (e) {
                      return e.id === entityID;
                    });
                    if (entity) context.enter(modeSelect(context, [entityID]));
                  });
                }
              }); // Replace with friendly name if possible
              // (The entity may not yet be loaded into the graph)

              if (entity) {
                var name = utilDisplayName(entity); // try to use common name

                if (!name && !isObjectLink) {
                  var preset = _mainPresetIndex.match(entity, context.graph());
                  name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
                }

                if (name) {
                  this.innerText = name;
                }
              }
            }); // Don't hide entities related to this error - #5880

            context.features().forceVisible(relatedEntities);
            context.map().pan([0, 0]); // trigger a redraw
          }

          improveOsmDetails.issue = function (val) {
            if (!arguments.length) return _qaItem;
            _qaItem = val;
            return improveOsmDetails;
          };

          return improveOsmDetails;
        }

        function uiImproveOsmHeader() {
          var _qaItem;

          function issueTitle(d) {
            var issueKey = d.issueKey;
            d.replacements = d.replacements || {};
            d.replacements["default"] = _t.html('inspector.unknown'); // special key `default` works as a fallback string

            return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".title"), d.replacements);
          }

          function improveOsmHeader(selection) {
            var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
              return "".concat(d.id, "-").concat(d.status || 0);
            });
            header.exit().remove();
            var headerEnter = header.enter().append('div').attr('class', 'qa-header');
            var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
              return d.id < 0;
            }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
              return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
            });
            svgEnter.append('polygon').attr('fill', 'currentColor').attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
            svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
              var picon = d.icon;

              if (!picon) {
                return '';
              } else {
                var isMaki = /^maki-/.test(picon);
                return "#".concat(picon).concat(isMaki ? '-11' : '');
              }
            });
            headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
          }

          improveOsmHeader.issue = function (val) {
            if (!arguments.length) return _qaItem;
            _qaItem = val;
            return improveOsmHeader;
          };

          return improveOsmHeader;
        }

        function uiImproveOsmEditor(context) {
          var dispatch = dispatch$8('change');
          var qaDetails = uiImproveOsmDetails(context);
          var qaComments = uiImproveOsmComments();
          var qaHeader = uiImproveOsmHeader();

          var _qaItem;

          function improveOsmEditor(selection) {
            var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
            headerEnter.append('button').attr('class', 'close').on('click', function () {
              return context.enter(modeBrowse(context));
            }).call(svgIcon('#iD-icon-close'));
            headerEnter.append('h3').html(_t.html('QA.improveOSM.title'));
            var body = selection.selectAll('.body').data([0]);
            body = body.enter().append('div').attr('class', 'body').merge(body);
            var editor = body.selectAll('.qa-editor').data([0]);
            editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(qaComments.issue(_qaItem)).call(improveOsmSaveSection);
          }

          function improveOsmSaveSection(selection) {
            var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();

            var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
            var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
              return "".concat(d.id, "-").concat(d.status || 0);
            }); // exit

            saveSection.exit().remove(); // enter

            var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
            saveSectionEnter.append('h4').attr('class', '.qa-save-header').html(_t.html('note.newComment'));
            saveSectionEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('QA.keepRight.comment_placeholder')).attr('maxlength', 1000).property('value', function (d) {
              return d.newComment;
            }).call(utilNoAuto).on('input', changeInput).on('blur', changeInput); // update

            saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);

            function changeInput() {
              var input = select(this);
              var val = input.property('value').trim();

              if (val === '') {
                val = undefined;
              } // store the unsaved comment with the issue itself


              _qaItem = _qaItem.update({
                newComment: val
              });
              var qaService = services.improveOSM;

              if (qaService) {
                qaService.replaceItem(_qaItem);
              }

              saveSection.call(qaSaveButtons);
            }
          }

          function qaSaveButtons(selection) {
            var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();

            var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
              return d.status + d.id;
            }); // exit

            buttonSection.exit().remove(); // enter

            var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
            buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('QA.keepRight.save_comment'));
            buttonEnter.append('button').attr('class', 'button close-button action');
            buttonEnter.append('button').attr('class', 'button ignore-button action'); // update

            buttonSection = buttonSection.merge(buttonEnter);
            buttonSection.select('.comment-button').attr('disabled', function (d) {
              return d.newComment ? null : true;
            }).on('click.comment', function (d3_event, d) {
              this.blur(); // avoid keeping focus on the button - #4641

              var qaService = services.improveOSM;

              if (qaService) {
                qaService.postUpdate(d, function (err, item) {
                  return dispatch.call('change', item);
                });
              }
            });
            buttonSection.select('.close-button').html(function (d) {
              var andComment = d.newComment ? '_comment' : '';
              return _t.html("QA.keepRight.close".concat(andComment));
            }).on('click.close', function (d3_event, d) {
              this.blur(); // avoid keeping focus on the button - #4641

              var qaService = services.improveOSM;

              if (qaService) {
                d.newStatus = 'SOLVED';
                qaService.postUpdate(d, function (err, item) {
                  return dispatch.call('change', item);
                });
              }
            });
            buttonSection.select('.ignore-button').html(function (d) {
              var andComment = d.newComment ? '_comment' : '';
              return _t.html("QA.keepRight.ignore".concat(andComment));
            }).on('click.ignore', function (d3_event, d) {
              this.blur(); // avoid keeping focus on the button - #4641

              var qaService = services.improveOSM;

              if (qaService) {
                d.newStatus = 'INVALID';
                qaService.postUpdate(d, function (err, item) {
                  return dispatch.call('change', item);
                });
              }
            });
          } // NOTE: Don't change method name until UI v3 is merged


          improveOsmEditor.error = function (val) {
            if (!arguments.length) return _qaItem;
            _qaItem = val;
            return improveOsmEditor;
          };

          return utilRebind(improveOsmEditor, dispatch, 'on');
        }

        function uiKeepRightDetails(context) {
          var _qaItem;

          function issueDetail(d) {
            var itemType = d.itemType,
                parentIssueType = d.parentIssueType;
            var unknown = _t.html('inspector.unknown');
            var replacements = d.replacements || {};
            replacements["default"] = unknown; // special key `default` works as a fallback string

            var detail = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".description"), replacements);

            if (detail === unknown) {
              detail = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".description"), replacements);
            }

            return detail;
          }

          function keepRightDetails(selection) {
            var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
              return "".concat(d.id, "-").concat(d.status || 0);
            });
            details.exit().remove();
            var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description

            var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
            descriptionEnter.append('h4').html(_t.html('QA.keepRight.detail_description'));
            descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..

            var relatedEntities = [];
            descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
              var link = select(this);
              var isObjectLink = link.classed('error_object_link');
              var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
              var entity = context.hasEntity(entityID);
              relatedEntities.push(entityID); // Add click handler

              link.on('mouseenter', function () {
                utilHighlightEntities([entityID], true, context);
              }).on('mouseleave', function () {
                utilHighlightEntities([entityID], false, context);
              }).on('click', function (d3_event) {
                d3_event.preventDefault();
                utilHighlightEntities([entityID], false, context);
                var osmlayer = context.layers().layer('osm');

                if (!osmlayer.enabled()) {
                  osmlayer.enabled(true);
                }

                context.map().centerZoomEase(_qaItem.loc, 20);

                if (entity) {
                  context.enter(modeSelect(context, [entityID]));
                } else {
                  context.loadEntity(entityID, function (err, result) {
                    if (err) return;
                    var entity = result.data.find(function (e) {
                      return e.id === entityID;
                    });
                    if (entity) context.enter(modeSelect(context, [entityID]));
                  });
                }
              }); // Replace with friendly name if possible
              // (The entity may not yet be loaded into the graph)

              if (entity) {
                var name = utilDisplayName(entity); // try to use common name

                if (!name && !isObjectLink) {
                  var preset = _mainPresetIndex.match(entity, context.graph());
                  name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
                }

                if (name) {
                  this.innerText = name;
                }
              }
            }); // Don't hide entities related to this issue - #5880

            context.features().forceVisible(relatedEntities);
            context.map().pan([0, 0]); // trigger a redraw
          }

          keepRightDetails.issue = function (val) {
            if (!arguments.length) return _qaItem;
            _qaItem = val;
            return keepRightDetails;
          };

          return keepRightDetails;
        }

        function uiKeepRightHeader() {
          var _qaItem;

          function issueTitle(d) {
            var itemType = d.itemType,
                parentIssueType = d.parentIssueType;
            var unknown = _t.html('inspector.unknown');
            var replacements = d.replacements || {};
            replacements["default"] = unknown; // special key `default` works as a fallback string

            var title = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);

            if (title === unknown) {
              title = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".title"), replacements);
            }

            return title;
          }

          function keepRightHeader(selection) {
            var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
              return "".concat(d.id, "-").concat(d.status || 0);
            });
            header.exit().remove();
            var headerEnter = header.enter().append('div').attr('class', 'qa-header');
            var iconEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
              return d.id < 0;
            });
            iconEnter.append('div').attr('class', function (d) {
              return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
            }).call(svgIcon('#iD-icon-bolt', 'qaItem-fill'));
            headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
          }

          keepRightHeader.issue = function (val) {
            if (!arguments.length) return _qaItem;
            _qaItem = val;
            return keepRightHeader;
          };

          return keepRightHeader;
        }

        function uiViewOnKeepRight() {
          var _qaItem;

          function viewOnKeepRight(selection) {
            var url;

            if (services.keepRight && _qaItem instanceof QAItem) {
              url = services.keepRight.issueURL(_qaItem);
            }

            var link = selection.selectAll('.view-on-keepRight').data(url ? [url] : []); // exit

            link.exit().remove(); // enter

            var linkEnter = link.enter().append('a').attr('class', 'view-on-keepRight').attr('target', '_blank').attr('rel', 'noopener') // security measure
            .attr('href', function (d) {
              return d;
            }).call(svgIcon('#iD-icon-out-link', 'inline'));
            linkEnter.append('span').html(_t.html('inspector.view_on_keepRight'));
          }

          viewOnKeepRight.what = function (val) {
            if (!arguments.length) return _qaItem;
            _qaItem = val;
            return viewOnKeepRight;
          };

          return viewOnKeepRight;
        }

        function uiKeepRightEditor(context) {
          var dispatch = dispatch$8('change');
          var qaDetails = uiKeepRightDetails(context);
          var qaHeader = uiKeepRightHeader();

          var _qaItem;

          function keepRightEditor(selection) {
            var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
            headerEnter.append('button').attr('class', 'close').on('click', function () {
              return context.enter(modeBrowse(context));
            }).call(svgIcon('#iD-icon-close'));
            headerEnter.append('h3').html(_t.html('QA.keepRight.title'));
            var body = selection.selectAll('.body').data([0]);
            body = body.enter().append('div').attr('class', 'body').merge(body);
            var editor = body.selectAll('.qa-editor').data([0]);
            editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(keepRightSaveSection);
            var footer = selection.selectAll('.footer').data([0]);
            footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnKeepRight().what(_qaItem));
          }

          function keepRightSaveSection(selection) {
            var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();

            var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
            var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
              return "".concat(d.id, "-").concat(d.status || 0);
            }); // exit

            saveSection.exit().remove(); // enter

            var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
            saveSectionEnter.append('h4').attr('class', '.qa-save-header').html(_t.html('QA.keepRight.comment'));
            saveSectionEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('QA.keepRight.comment_placeholder')).attr('maxlength', 1000).property('value', function (d) {
              return d.newComment || d.comment;
            }).call(utilNoAuto).on('input', changeInput).on('blur', changeInput); // update

            saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);

            function changeInput() {
              var input = select(this);
              var val = input.property('value').trim();

              if (val === _qaItem.comment) {
                val = undefined;
              } // store the unsaved comment with the issue itself


              _qaItem = _qaItem.update({
                newComment: val
              });
              var qaService = services.keepRight;

              if (qaService) {
                qaService.replaceItem(_qaItem); // update keepright cache
              }

              saveSection.call(qaSaveButtons);
            }
          }

          function qaSaveButtons(selection) {
            var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();

            var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
              return d.status + d.id;
            }); // exit

            buttonSection.exit().remove(); // enter

            var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
            buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('QA.keepRight.save_comment'));
            buttonEnter.append('button').attr('class', 'button close-button action');
            buttonEnter.append('button').attr('class', 'button ignore-button action'); // update

            buttonSection = buttonSection.merge(buttonEnter);
            buttonSection.select('.comment-button') // select and propagate data
            .attr('disabled', function (d) {
              return d.newComment ? null : true;
            }).on('click.comment', function (d3_event, d) {
              this.blur(); // avoid keeping focus on the button - #4641

              var qaService = services.keepRight;

              if (qaService) {
                qaService.postUpdate(d, function (err, item) {
                  return dispatch.call('change', item);
                });
              }
            });
            buttonSection.select('.close-button') // select and propagate data
            .html(function (d) {
              var andComment = d.newComment ? '_comment' : '';
              return _t.html("QA.keepRight.close".concat(andComment));
            }).on('click.close', function (d3_event, d) {
              this.blur(); // avoid keeping focus on the button - #4641

              var qaService = services.keepRight;

              if (qaService) {
                d.newStatus = 'ignore_t'; // ignore temporarily (item fixed)

                qaService.postUpdate(d, function (err, item) {
                  return dispatch.call('change', item);
                });
              }
            });
            buttonSection.select('.ignore-button') // select and propagate data
            .html(function (d) {
              var andComment = d.newComment ? '_comment' : '';
              return _t.html("QA.keepRight.ignore".concat(andComment));
            }).on('click.ignore', function (d3_event, d) {
              this.blur(); // avoid keeping focus on the button - #4641

              var qaService = services.keepRight;

              if (qaService) {
                d.newStatus = 'ignore'; // ignore permanently (false positive)

                qaService.postUpdate(d, function (err, item) {
                  return dispatch.call('change', item);
                });
              }
            });
          } // NOTE: Don't change method name until UI v3 is merged


          keepRightEditor.error = function (val) {
            if (!arguments.length) return _qaItem;
            _qaItem = val;
            return keepRightEditor;
          };

          return utilRebind(keepRightEditor, dispatch, 'on');
        }

        function uiOsmoseDetails(context) {
          var _qaItem;

          function issueString(d, type) {
            if (!d) return ''; // Issue strings are cached from Osmose API

            var s = services.osmose.getStrings(d.itemType);
            return type in s ? s[type] : '';
          }

          function osmoseDetails(selection) {
            var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
              return "".concat(d.id, "-").concat(d.status || 0);
            });
            details.exit().remove();
            var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // Description

            if (issueString(_qaItem, 'detail')) {
              var div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
              div.append('h4').html(_t.html('QA.keepRight.detail_description'));
              div.append('p').attr('class', 'qa-details-description-text').html(function (d) {
                return issueString(d, 'detail');
              }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
            } // Elements (populated later as data is requested)


            var detailsDiv = detailsEnter.append('div').attr('class', 'qa-details-subsection');
            var elemsDiv = detailsEnter.append('div').attr('class', 'qa-details-subsection'); // Suggested Fix (mustn't exist for every issue type)

            if (issueString(_qaItem, 'fix')) {
              var _div = detailsEnter.append('div').attr('class', 'qa-details-subsection');

              _div.append('h4').html(_t.html('QA.osmose.fix_title'));

              _div.append('p').html(function (d) {
                return issueString(d, 'fix');
              }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
            } // Common Pitfalls (mustn't exist for every issue type)


            if (issueString(_qaItem, 'trap')) {
              var _div2 = detailsEnter.append('div').attr('class', 'qa-details-subsection');

              _div2.append('h4').html(_t.html('QA.osmose.trap_title'));

              _div2.append('p').html(function (d) {
                return issueString(d, 'trap');
              }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
            } // Save current item to check if UI changed by time request resolves


            var thisItem = _qaItem;
            services.osmose.loadIssueDetail(_qaItem).then(function (d) {
              // No details to add if there are no associated issue elements
              if (!d.elems || d.elems.length === 0) return; // Do nothing if UI has moved on by the time this resolves

              if (context.selectedErrorID() !== thisItem.id && context.container().selectAll(".qaItem.osmose.hover.itemId-".concat(thisItem.id)).empty()) return; // Things like keys and values are dynamically added to a subtitle string

              if (d.detail) {
                detailsDiv.append('h4').html(_t.html('QA.osmose.detail_title'));
                detailsDiv.append('p').html(function (d) {
                  return d.detail;
                }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
              } // Create list of linked issue elements


              elemsDiv.append('h4').html(_t.html('QA.osmose.elems_title'));
              elemsDiv.append('ul').selectAll('li').data(d.elems).enter().append('li').append('a').attr('href', '#').attr('class', 'error_entity_link').html(function (d) {
                return d;
              }).each(function () {
                var link = select(this);
                var entityID = this.textContent;
                var entity = context.hasEntity(entityID); // Add click handler

                link.on('mouseenter', function () {
                  utilHighlightEntities([entityID], true, context);
                }).on('mouseleave', function () {
                  utilHighlightEntities([entityID], false, context);
                }).on('click', function (d3_event) {
                  d3_event.preventDefault();
                  utilHighlightEntities([entityID], false, context);
                  var osmlayer = context.layers().layer('osm');

                  if (!osmlayer.enabled()) {
                    osmlayer.enabled(true);
                  }

                  context.map().centerZoom(d.loc, 20);

                  if (entity) {
                    context.enter(modeSelect(context, [entityID]));
                  } else {
                    context.loadEntity(entityID, function (err, result) {
                      if (err) return;
                      var entity = result.data.find(function (e) {
                        return e.id === entityID;
                      });
                      if (entity) context.enter(modeSelect(context, [entityID]));
                    });
                  }
                }); // Replace with friendly name if possible
                // (The entity may not yet be loaded into the graph)

                if (entity) {
                  var name = utilDisplayName(entity); // try to use common name

                  if (!name) {
                    var preset = _mainPresetIndex.match(entity, context.graph());
                    name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
                  }

                  if (name) {
                    this.innerText = name;
                  }
                }
              }); // Don't hide entities related to this issue - #5880

              context.features().forceVisible(d.elems);
              context.map().pan([0, 0]); // trigger a redraw
            })["catch"](function (err) {
              console.log(err); // eslint-disable-line no-console
            });
          }

          osmoseDetails.issue = function (val) {
            if (!arguments.length) return _qaItem;
            _qaItem = val;
            return osmoseDetails;
          };

          return osmoseDetails;
        }

        function uiOsmoseHeader() {
          var _qaItem;

          function issueTitle(d) {
            var unknown = _t('inspector.unknown');
            if (!d) return unknown; // Issue titles supplied by Osmose

            var s = services.osmose.getStrings(d.itemType);
            return 'title' in s ? s.title : unknown;
          }

          function osmoseHeader(selection) {
            var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
              return "".concat(d.id, "-").concat(d.status || 0);
            });
            header.exit().remove();
            var headerEnter = header.enter().append('div').attr('class', 'qa-header');
            var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
              return d.id < 0;
            }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
              return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
            });
            svgEnter.append('polygon').attr('fill', function (d) {
              return services.osmose.getColor(d.item);
            }).attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
            svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
              var picon = d.icon;

              if (!picon) {
                return '';
              } else {
                var isMaki = /^maki-/.test(picon);
                return "#".concat(picon).concat(isMaki ? '-11' : '');
              }
            });
            headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
          }

          osmoseHeader.issue = function (val) {
            if (!arguments.length) return _qaItem;
            _qaItem = val;
            return osmoseHeader;
          };

          return osmoseHeader;
        }

        function uiViewOnOsmose() {
          var _qaItem;

          function viewOnOsmose(selection) {
            var url;

            if (services.osmose && _qaItem instanceof QAItem) {
              url = services.osmose.itemURL(_qaItem);
            }

            var link = selection.selectAll('.view-on-osmose').data(url ? [url] : []); // exit

            link.exit().remove(); // enter

            var linkEnter = link.enter().append('a').attr('class', 'view-on-osmose').attr('target', '_blank').attr('rel', 'noopener') // security measure
            .attr('href', function (d) {
              return d;
            }).call(svgIcon('#iD-icon-out-link', 'inline'));
            linkEnter.append('span').html(_t.html('inspector.view_on_osmose'));
          }

          viewOnOsmose.what = function (val) {
            if (!arguments.length) return _qaItem;
            _qaItem = val;
            return viewOnOsmose;
          };

          return viewOnOsmose;
        }

        function uiOsmoseEditor(context) {
          var dispatch = dispatch$8('change');
          var qaDetails = uiOsmoseDetails(context);
          var qaHeader = uiOsmoseHeader();

          var _qaItem;

          function osmoseEditor(selection) {
            var header = selection.selectAll('.header').data([0]);
            var headerEnter = header.enter().append('div').attr('class', 'header fillL');
            headerEnter.append('button').attr('class', 'close').on('click', function () {
              return context.enter(modeBrowse(context));
            }).call(svgIcon('#iD-icon-close'));
            headerEnter.append('h3').html(_t.html('QA.osmose.title'));
            var body = selection.selectAll('.body').data([0]);
            body = body.enter().append('div').attr('class', 'body').merge(body);
            var editor = body.selectAll('.qa-editor').data([0]);
            editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(osmoseSaveSection);
            var footer = selection.selectAll('.footer').data([0]);
            footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOsmose().what(_qaItem));
          }

          function osmoseSaveSection(selection) {
            var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();

            var isShown = _qaItem && isSelected;
            var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
              return "".concat(d.id, "-").concat(d.status || 0);
            }); // exit

            saveSection.exit().remove(); // enter

            var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf'); // update

            saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
          }

          function qaSaveButtons(selection) {
            var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();

            var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
              return d.status + d.id;
            }); // exit

            buttonSection.exit().remove(); // enter

            var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
            buttonEnter.append('button').attr('class', 'button close-button action');
            buttonEnter.append('button').attr('class', 'button ignore-button action'); // update

            buttonSection = buttonSection.merge(buttonEnter);
            buttonSection.select('.close-button').html(_t.html('QA.keepRight.close')).on('click.close', function (d3_event, d) {
              this.blur(); // avoid keeping focus on the button - #4641

              var qaService = services.osmose;

              if (qaService) {
                d.newStatus = 'done';
                qaService.postUpdate(d, function (err, item) {
                  return dispatch.call('change', item);
                });
              }
            });
            buttonSection.select('.ignore-button').html(_t.html('QA.keepRight.ignore')).on('click.ignore', function (d3_event, d) {
              this.blur(); // avoid keeping focus on the button - #4641

              var qaService = services.osmose;

              if (qaService) {
                d.newStatus = 'false';
                qaService.postUpdate(d, function (err, item) {
                  return dispatch.call('change', item);
                });
              }
            });
          } // NOTE: Don't change method name until UI v3 is merged


          osmoseEditor.error = function (val) {
            if (!arguments.length) return _qaItem;
            _qaItem = val;
            return osmoseEditor;
          };

          return utilRebind(osmoseEditor, dispatch, 'on');
        }

        function uiNoteComments() {
          var _note;

          function noteComments(selection) {
            if (_note.isNew()) return; // don't draw .comments-container

            var comments = selection.selectAll('.comments-container').data([0]);
            comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments);
            var commentEnter = comments.selectAll('.comment').data(_note.comments).enter().append('div').attr('class', 'comment');
            commentEnter.append('div').attr('class', function (d) {
              return 'comment-avatar user-' + d.uid;
            }).call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
            var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
            var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
            metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
              var selection = select(this);
              var osm = services.osm;

              if (osm && d.user) {
                selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.user)).attr('target', '_blank');
              }

              selection.html(function (d) {
                return d.user || _t.html('note.anonymous');
              });
            });
            metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
              return _t('note.status.' + d.action, {
                when: localeDateString(d.date)
              });
            });
            mainEnter.append('div').attr('class', 'comment-text').html(function (d) {
              return d.html;
            }).selectAll('a').attr('rel', 'noopener nofollow').attr('target', '_blank');
            comments.call(replaceAvatars);
          }

          function replaceAvatars(selection) {
            var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
            var osm = services.osm;
            if (showThirdPartyIcons !== 'true' || !osm) return;
            var uids = {}; // gather uids in the comment thread

            _note.comments.forEach(function (d) {
              if (d.uid) uids[d.uid] = true;
            });

            Object.keys(uids).forEach(function (uid) {
              osm.loadUser(uid, function (err, user) {
                if (!user || !user.image_url) return;
                selection.selectAll('.comment-avatar.user-' + uid).html('').append('img').attr('class', 'icon comment-avatar-icon').attr('src', user.image_url).attr('alt', user.display_name);
              });
            });
          }

          function localeDateString(s) {
            if (!s) return null;
            var options = {
              day: 'numeric',
              month: 'short',
              year: 'numeric'
            };
            s = s.replace(/-/g, '/'); // fix browser-specific Date() issues

            var d = new Date(s);
            if (isNaN(d.getTime())) return null;
            return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
          }

          noteComments.note = function (val) {
            if (!arguments.length) return _note;
            _note = val;
            return noteComments;
          };

          return noteComments;
        }

        function uiNoteHeader() {
          var _note;

          function noteHeader(selection) {
            var header = selection.selectAll('.note-header').data(_note ? [_note] : [], function (d) {
              return d.status + d.id;
            });
            header.exit().remove();
            var headerEnter = header.enter().append('div').attr('class', 'note-header');
            var iconEnter = headerEnter.append('div').attr('class', function (d) {
              return 'note-header-icon ' + d.status;
            }).classed('new', function (d) {
              return d.id < 0;
            });
            iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-note', 'note-fill'));
            iconEnter.each(function (d) {
              var statusIcon;

              if (d.id < 0) {
                statusIcon = '#iD-icon-plus';
              } else if (d.status === 'open') {
                statusIcon = '#iD-icon-close';
              } else {
                statusIcon = '#iD-icon-apply';
              }

              iconEnter.append('div').attr('class', 'note-icon-annotation').call(svgIcon(statusIcon, 'icon-annotation'));
            });
            headerEnter.append('div').attr('class', 'note-header-label').html(function (d) {
              if (_note.isNew()) {
                return _t('note.new');
              }

              return _t('note.note') + ' ' + d.id + ' ' + (d.status === 'closed' ? _t('note.closed') : '');
            });
          }

          noteHeader.note = function (val) {
            if (!arguments.length) return _note;
            _note = val;
            return noteHeader;
          };

          return noteHeader;
        }

        function uiNoteReport() {
          var _note;

          function noteReport(selection) {
            var url;

            if (services.osm && _note instanceof osmNote && !_note.isNew()) {
              url = services.osm.noteReportURL(_note);
            }

            var link = selection.selectAll('.note-report').data(url ? [url] : []); // exit

            link.exit().remove(); // enter

            var linkEnter = link.enter().append('a').attr('class', 'note-report').attr('target', '_blank').attr('href', function (d) {
              return d;
            }).call(svgIcon('#iD-icon-out-link', 'inline'));
            linkEnter.append('span').html(_t.html('note.report'));
          }

          noteReport.note = function (val) {
            if (!arguments.length) return _note;
            _note = val;
            return noteReport;
          };

          return noteReport;
        }

        function uiNoteEditor(context) {
          var dispatch = dispatch$8('change');
          var noteComments = uiNoteComments();
          var noteHeader = uiNoteHeader(); // var formFields = uiFormFields(context);

          var _note;

          var _newNote; // var _fieldsArr;


          function noteEditor(selection) {
            var header = selection.selectAll('.header').data([0]);
            var headerEnter = header.enter().append('div').attr('class', 'header fillL');
            headerEnter.append('button').attr('class', 'close').on('click', function () {
              context.enter(modeBrowse(context));
            }).call(svgIcon('#iD-icon-close'));
            headerEnter.append('h3').html(_t.html('note.title'));
            var body = selection.selectAll('.body').data([0]);
            body = body.enter().append('div').attr('class', 'body').merge(body);
            var editor = body.selectAll('.note-editor').data([0]);
            editor.enter().append('div').attr('class', 'modal-section note-editor').merge(editor).call(noteHeader.note(_note)).call(noteComments.note(_note)).call(noteSaveSection);
            var footer = selection.selectAll('.footer').data([0]);
            footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOSM(context).what(_note)).call(uiNoteReport().note(_note)); // rerender the note editor on any auth change

            var osm = services.osm;

            if (osm) {
              osm.on('change.note-save', function () {
                selection.call(noteEditor);
              });
            }
          }

          function noteSaveSection(selection) {
            var isSelected = _note && _note.id === context.selectedNoteID();

            var noteSave = selection.selectAll('.note-save').data(isSelected ? [_note] : [], function (d) {
              return d.status + d.id;
            }); // exit

            noteSave.exit().remove(); // enter

            var noteSaveEnter = noteSave.enter().append('div').attr('class', 'note-save save-section cf'); // // if new note, show categories to pick from
            // if (_note.isNew()) {
            //     var presets = presetManager;
            //     // NOTE: this key isn't a age and therefore there is no documentation (yet)
            //     _fieldsArr = [
            //         uiField(context, presets.field('category'), null, { show: true, revert: false }),
            //     ];
            //     _fieldsArr.forEach(function(field) {
            //         field
            //             .on('change', changeCategory);
            //     });
            //     noteSaveEnter
            //         .append('div')
            //         .attr('class', 'note-category')
            //         .call(formFields.fieldsArr(_fieldsArr));
            // }
            // function changeCategory() {
            //     // NOTE: perhaps there is a better way to get value
            //     var val = context.container().select('input[name=\'category\']:checked').property('__data__') || undefined;
            //     // store the unsaved category with the note itself
            //     _note = _note.update({ newCategory: val });
            //     var osm = services.osm;
            //     if (osm) {
            //         osm.replaceNote(_note);  // update note cache
            //     }
            //     noteSave
            //         .call(noteSaveButtons);
            // }

            noteSaveEnter.append('h4').attr('class', '.note-save-header').html(function () {
              return _note.isNew() ? _t('note.newDescription') : _t('note.newComment');
            });
            var commentTextarea = noteSaveEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('note.inputPlaceholder')).attr('maxlength', 1000).property('value', function (d) {
              return d.newComment;
            }).call(utilNoAuto).on('keydown.note-input', keydown).on('input.note-input', changeInput).on('blur.note-input', changeInput);

            if (!commentTextarea.empty() && _newNote) {
              // autofocus the comment field for new notes
              commentTextarea.node().focus();
            } // update


            noteSave = noteSaveEnter.merge(noteSave).call(userDetails).call(noteSaveButtons); // fast submit if user presses cmd+enter

            function keydown(d3_event) {
              if (!(d3_event.keyCode === 13 && // ↩ Return
              d3_event.metaKey)) return;
              var osm = services.osm;
              if (!osm) return;
              var hasAuth = osm.authenticated();
              if (!hasAuth) return;
              if (!_note.newComment) return;
              d3_event.preventDefault();
              select(this).on('keydown.note-input', null); // focus on button and submit

              window.setTimeout(function () {
                if (_note.isNew()) {
                  noteSave.selectAll('.save-button').node().focus();
                  clickSave();
                } else {
                  noteSave.selectAll('.comment-button').node().focus();
                  clickComment();
                }
              }, 10);
            }

            function changeInput() {
              var input = select(this);
              var val = input.property('value').trim() || undefined; // store the unsaved comment with the note itself

              _note = _note.update({
                newComment: val
              });
              var osm = services.osm;

              if (osm) {
                osm.replaceNote(_note); // update note cache
              }

              noteSave.call(noteSaveButtons);
            }
          }

          function userDetails(selection) {
            var detailSection = selection.selectAll('.detail-section').data([0]);
            detailSection = detailSection.enter().append('div').attr('class', 'detail-section').merge(detailSection);
            var osm = services.osm;
            if (!osm) return; // Add warning if user is not logged in

            var hasAuth = osm.authenticated();
            var authWarning = detailSection.selectAll('.auth-warning').data(hasAuth ? [] : [0]);
            authWarning.exit().transition().duration(200).style('opacity', 0).remove();
            var authEnter = authWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning auth-warning').style('opacity', 0);
            authEnter.call(svgIcon('#iD-icon-alert', 'inline'));
            authEnter.append('span').html(_t.html('note.login'));
            authEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('login')).on('click.note-login', function (d3_event) {
              d3_event.preventDefault();
              osm.authenticate();
            });
            authEnter.transition().duration(200).style('opacity', 1);
            var prose = detailSection.selectAll('.note-save-prose').data(hasAuth ? [0] : []);
            prose.exit().remove();
            prose = prose.enter().append('p').attr('class', 'note-save-prose').html(_t.html('note.upload_explanation')).merge(prose);
            osm.userDetails(function (err, user) {
              if (err) return;
              var userLink = select(document.createElement('div'));

              if (user.image_url) {
                userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
              }

              userLink.append('a').attr('class', 'user-info').html(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
              prose.html(_t.html('note.upload_explanation_with_user', {
                user: userLink.html()
              }));
            });
          }

          function noteSaveButtons(selection) {
            var osm = services.osm;
            var hasAuth = osm && osm.authenticated();

            var isSelected = _note && _note.id === context.selectedNoteID();

            var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_note] : [], function (d) {
              return d.status + d.id;
            }); // exit

            buttonSection.exit().remove(); // enter

            var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');

            if (_note.isNew()) {
              buttonEnter.append('button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
              buttonEnter.append('button').attr('class', 'button save-button action').html(_t.html('note.save'));
            } else {
              buttonEnter.append('button').attr('class', 'button status-button action');
              buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('note.comment'));
            } // update


            buttonSection = buttonSection.merge(buttonEnter);
            buttonSection.select('.cancel-button') // select and propagate data
            .on('click.cancel', clickCancel);
            buttonSection.select('.save-button') // select and propagate data
            .attr('disabled', isSaveDisabled).on('click.save', clickSave);
            buttonSection.select('.status-button') // select and propagate data
            .attr('disabled', hasAuth ? null : true).html(function (d) {
              var action = d.status === 'open' ? 'close' : 'open';
              var andComment = d.newComment ? '_comment' : '';
              return _t('note.' + action + andComment);
            }).on('click.status', clickStatus);
            buttonSection.select('.comment-button') // select and propagate data
            .attr('disabled', isSaveDisabled).on('click.comment', clickComment);

            function isSaveDisabled(d) {
              return hasAuth && d.status === 'open' && d.newComment ? null : true;
            }
          }

          function clickCancel(d3_event, d) {
            this.blur(); // avoid keeping focus on the button - #4641

            var osm = services.osm;

            if (osm) {
              osm.removeNote(d);
            }

            context.enter(modeBrowse(context));
            dispatch.call('change');
          }

          function clickSave(d3_event, d) {
            this.blur(); // avoid keeping focus on the button - #4641

            var osm = services.osm;

            if (osm) {
              osm.postNoteCreate(d, function (err, note) {
                dispatch.call('change', note);
              });
            }
          }

          function clickStatus(d3_event, d) {
            this.blur(); // avoid keeping focus on the button - #4641

            var osm = services.osm;

            if (osm) {
              var setStatus = d.status === 'open' ? 'closed' : 'open';
              osm.postNoteUpdate(d, setStatus, function (err, note) {
                dispatch.call('change', note);
              });
            }
          }

          function clickComment(d3_event, d) {
            this.blur(); // avoid keeping focus on the button - #4641

            var osm = services.osm;

            if (osm) {
              osm.postNoteUpdate(d, d.status, function (err, note) {
                dispatch.call('change', note);
              });
            }
          }

          noteEditor.note = function (val) {
            if (!arguments.length) return _note;
            _note = val;
            return noteEditor;
          };

          noteEditor.newNote = function (val) {
            if (!arguments.length) return _newNote;
            _newNote = val;
            return noteEditor;
          };

          return utilRebind(noteEditor, dispatch, 'on');
        }

        function uiSidebar(context) {
          var inspector = uiInspector(context);
          var dataEditor = uiDataEditor(context);
          var noteEditor = uiNoteEditor(context);
          var improveOsmEditor = uiImproveOsmEditor(context);
          var keepRightEditor = uiKeepRightEditor(context);
          var osmoseEditor = uiOsmoseEditor(context);

          var _current;

          var _wasData = false;
          var _wasNote = false;
          var _wasQaItem = false; // use pointer events on supported platforms; fallback to mouse events

          var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

          function sidebar(selection) {
            var container = context.container();
            var minWidth = 240;
            var sidebarWidth;
            var containerWidth;
            var dragOffset; // Set the initial width constraints

            selection.style('min-width', minWidth + 'px').style('max-width', '400px').style('width', '33.3333%');
            var resizer = selection.append('div').attr('class', 'sidebar-resizer').on(_pointerPrefix + 'down.sidebar-resizer', pointerdown);
            var downPointerId, lastClientX, containerLocGetter;

            function pointerdown(d3_event) {
              if (downPointerId) return;
              if ('button' in d3_event && d3_event.button !== 0) return;
              downPointerId = d3_event.pointerId || 'mouse';
              lastClientX = d3_event.clientX;
              containerLocGetter = utilFastMouse(container.node()); // offset from edge of sidebar-resizer

              dragOffset = utilFastMouse(resizer.node())(d3_event)[0] - 1;
              sidebarWidth = selection.node().getBoundingClientRect().width;
              containerWidth = container.node().getBoundingClientRect().width;
              var widthPct = sidebarWidth / containerWidth * 100;
              selection.style('width', widthPct + '%') // lock in current width
              .style('max-width', '85%'); // but allow larger widths

              resizer.classed('dragging', true);
              select(window).on('touchmove.sidebar-resizer', function (d3_event) {
                // disable page scrolling while resizing on touch input
                d3_event.preventDefault();
              }, {
                passive: false
              }).on(_pointerPrefix + 'move.sidebar-resizer', pointermove).on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', pointerup);
            }

            function pointermove(d3_event) {
              if (downPointerId !== (d3_event.pointerId || 'mouse')) return;
              d3_event.preventDefault();
              var dx = d3_event.clientX - lastClientX;
              lastClientX = d3_event.clientX;
              var isRTL = _mainLocalizer.textDirection() === 'rtl';
              var scaleX = isRTL ? 0 : 1;
              var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
              var x = containerLocGetter(d3_event)[0] - dragOffset;
              sidebarWidth = isRTL ? containerWidth - x : x;
              var isCollapsed = selection.classed('collapsed');
              var shouldCollapse = sidebarWidth < minWidth;
              selection.classed('collapsed', shouldCollapse);

              if (shouldCollapse) {
                if (!isCollapsed) {
                  selection.style(xMarginProperty, '-400px').style('width', '400px');
                  context.ui().onResize([(sidebarWidth - dx) * scaleX, 0]);
                }
              } else {
                var widthPct = sidebarWidth / containerWidth * 100;
                selection.style(xMarginProperty, null).style('width', widthPct + '%');

                if (isCollapsed) {
                  context.ui().onResize([-sidebarWidth * scaleX, 0]);
                } else {
                  context.ui().onResize([-dx * scaleX, 0]);
                }
              }
            }

            function pointerup(d3_event) {
              if (downPointerId !== (d3_event.pointerId || 'mouse')) return;
              downPointerId = null;
              resizer.classed('dragging', false);
              select(window).on('touchmove.sidebar-resizer', null).on(_pointerPrefix + 'move.sidebar-resizer', null).on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', null);
            }

            var featureListWrap = selection.append('div').attr('class', 'feature-list-pane').call(uiFeatureList(context));
            var inspectorWrap = selection.append('div').attr('class', 'inspector-hidden inspector-wrap');

            var hoverModeSelect = function hoverModeSelect(targets) {
              context.container().selectAll('.feature-list-item button').classed('hover', false);

              if (context.selectedIDs().length > 1 && targets && targets.length) {
                var elements = context.container().selectAll('.feature-list-item button').filter(function (node) {
                  return targets.indexOf(node) !== -1;
                });

                if (!elements.empty()) {
                  elements.classed('hover', true);
                }
              }
            };

            sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);

            function hover(targets) {
              var datum = targets && targets.length && targets[0];

              if (datum && datum.__featurehash__) {
                // hovering on data
                _wasData = true;
                sidebar.show(dataEditor.datum(datum));
                selection.selectAll('.sidebar-component').classed('inspector-hover', true);
              } else if (datum instanceof osmNote) {
                if (context.mode().id === 'drag-note') return;
                _wasNote = true;
                var osm = services.osm;

                if (osm) {
                  datum = osm.getNote(datum.id); // marker may contain stale data - get latest
                }

                sidebar.show(noteEditor.note(datum));
                selection.selectAll('.sidebar-component').classed('inspector-hover', true);
              } else if (datum instanceof QAItem) {
                _wasQaItem = true;
                var errService = services[datum.service];

                if (errService) {
                  // marker may contain stale data - get latest
                  datum = errService.getError(datum.id);
                } // Currently only three possible services


                var errEditor;

                if (datum.service === 'keepRight') {
                  errEditor = keepRightEditor;
                } else if (datum.service === 'osmose') {
                  errEditor = osmoseEditor;
                } else {
                  errEditor = improveOsmEditor;
                }

                context.container().selectAll('.qaItem.' + datum.service).classed('hover', function (d) {
                  return d.id === datum.id;
                });
                sidebar.show(errEditor.error(datum));
                selection.selectAll('.sidebar-component').classed('inspector-hover', true);
              } else if (!_current && datum instanceof osmEntity) {
                featureListWrap.classed('inspector-hidden', true);
                inspectorWrap.classed('inspector-hidden', false).classed('inspector-hover', true);

                if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), [datum.id]) || inspector.state() !== 'hover') {
                  inspector.state('hover').entityIDs([datum.id]).newFeature(false);
                  inspectorWrap.call(inspector);
                }
              } else if (!_current) {
                featureListWrap.classed('inspector-hidden', false);
                inspectorWrap.classed('inspector-hidden', true);
                inspector.state('hide');
              } else if (_wasData || _wasNote || _wasQaItem) {
                _wasNote = false;
                _wasData = false;
                _wasQaItem = false;
                context.container().selectAll('.note').classed('hover', false);
                context.container().selectAll('.qaItem').classed('hover', false);
                sidebar.hide();
              }
            }

            sidebar.hover = throttle(hover, 200);

            sidebar.intersects = function (extent) {
              var rect = selection.node().getBoundingClientRect();
              return extent.intersects([context.projection.invert([0, rect.height]), context.projection.invert([rect.width, 0])]);
            };

            sidebar.select = function (ids, newFeature) {
              sidebar.hide();

              if (ids && ids.length) {
                var entity = ids.length === 1 && context.entity(ids[0]);

                if (entity && newFeature && selection.classed('collapsed')) {
                  // uncollapse the sidebar
                  var extent = entity.extent(context.graph());
                  sidebar.expand(sidebar.intersects(extent));
                }

                featureListWrap.classed('inspector-hidden', true);
                inspectorWrap.classed('inspector-hidden', false).classed('inspector-hover', false); // reload the UI even if the ids are the same since the entities
                // themselves may have changed

                inspector.state('select').entityIDs(ids).newFeature(newFeature);
                inspectorWrap.call(inspector);
              } else {
                inspector.state('hide');
              }
            };

            sidebar.showPresetList = function () {
              inspector.showList();
            };

            sidebar.show = function (component, element) {
              featureListWrap.classed('inspector-hidden', true);
              inspectorWrap.classed('inspector-hidden', true);
              if (_current) _current.remove();
              _current = selection.append('div').attr('class', 'sidebar-component').call(component, element);
            };

            sidebar.hide = function () {
              featureListWrap.classed('inspector-hidden', false);
              inspectorWrap.classed('inspector-hidden', true);
              if (_current) _current.remove();
              _current = null;
            };

            sidebar.expand = function (moveMap) {
              if (selection.classed('collapsed')) {
                sidebar.toggle(moveMap);
              }
            };

            sidebar.collapse = function (moveMap) {
              if (!selection.classed('collapsed')) {
                sidebar.toggle(moveMap);
              }
            };

            sidebar.toggle = function (moveMap) {
              // Don't allow sidebar to toggle when the user is in the walkthrough.
              if (context.inIntro()) return;
              var isCollapsed = selection.classed('collapsed');
              var isCollapsing = !isCollapsed;
              var isRTL = _mainLocalizer.textDirection() === 'rtl';
              var scaleX = isRTL ? 0 : 1;
              var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
              sidebarWidth = selection.node().getBoundingClientRect().width; // switch from % to px

              selection.style('width', sidebarWidth + 'px');
              var startMargin, endMargin, lastMargin;

              if (isCollapsing) {
                startMargin = lastMargin = 0;
                endMargin = -sidebarWidth;
              } else {
                startMargin = lastMargin = -sidebarWidth;
                endMargin = 0;
              }

              if (!isCollapsing) {
                // unhide the sidebar's content before it transitions onscreen
                selection.classed('collapsed', isCollapsing);
              }

              selection.transition().style(xMarginProperty, endMargin + 'px').tween('panner', function () {
                var i = d3_interpolateNumber(startMargin, endMargin);
                return function (t) {
                  var dx = lastMargin - Math.round(i(t));
                  lastMargin = lastMargin - dx;
                  context.ui().onResize(moveMap ? undefined : [dx * scaleX, 0]);
                };
              }).on('end', function () {
                if (isCollapsing) {
                  // hide the sidebar's content after it transitions offscreen
                  selection.classed('collapsed', isCollapsing);
                } // switch back from px to %


                if (!isCollapsing) {
                  var containerWidth = container.node().getBoundingClientRect().width;
                  var widthPct = sidebarWidth / containerWidth * 100;
                  selection.style(xMarginProperty, null).style('width', widthPct + '%');
                }
              });
            }; // toggle the sidebar collapse when double-clicking the resizer


            resizer.on('dblclick', function (d3_event) {
              d3_event.preventDefault();

              if (d3_event.sourceEvent) {
                d3_event.sourceEvent.preventDefault();
              }

              sidebar.toggle();
            }); // ensure hover sidebar is closed when zooming out beyond editable zoom

            context.map().on('crossEditableZoom.sidebar', function (within) {
              if (!within && !selection.select('.inspector-hover').empty()) {
                hover([]);
              }
            });
          }

          sidebar.showPresetList = function () {};

          sidebar.hover = function () {};

          sidebar.hover.cancel = function () {};

          sidebar.intersects = function () {};

          sidebar.select = function () {};

          sidebar.show = function () {};

          sidebar.hide = function () {};

          sidebar.expand = function () {};

          sidebar.collapse = function () {};

          sidebar.toggle = function () {};

          return sidebar;
        }

        function uiSourceSwitch(context) {
          var keys;

          function click(d3_event) {
            d3_event.preventDefault();
            var osm = context.connection();
            if (!osm) return;
            if (context.inIntro()) return;
            if (context.history().hasChanges() && !window.confirm(_t('source_switch.lose_changes'))) return;
            var isLive = select(this).classed('live');
            isLive = !isLive;
            context.enter(modeBrowse(context));
            context.history().clearSaved(); // remove saved history

            context.flush(); // remove stored data

            select(this).html(isLive ? _t.html('source_switch.live') : _t.html('source_switch.dev')).classed('live', isLive).classed('chip', isLive);
            osm["switch"](isLive ? keys[0] : keys[1]); // switch connection (warning: dispatches 'change' event)
          }

          var sourceSwitch = function sourceSwitch(selection) {
            selection.append('a').attr('href', '#').html(_t.html('source_switch.live')).attr('class', 'live chip').on('click', click);
          };

          sourceSwitch.keys = function (_) {
            if (!arguments.length) return keys;
            keys = _;
            return sourceSwitch;
          };

          return sourceSwitch;
        }

        function uiSpinner(context) {
          var osm = context.connection();
          return function (selection) {
            var img = selection.append('img').attr('src', context.imagePath('loader-black.gif')).style('opacity', 0);

            if (osm) {
              osm.on('loading.spinner', function () {
                img.transition().style('opacity', 1);
              }).on('loaded.spinner', function () {
                img.transition().style('opacity', 0);
              });
            }
          };
        }

        function uiSplash(context) {
          return function (selection) {
            // Exception - if there are restorable changes, skip this splash screen.
            // This is because we currently only support one `uiModal` at a time
            //  and we need to show them `uiRestore`` instead of this one.
            if (context.history().hasRestorableChanges()) return; // If user has not seen this version of the privacy policy, show the splash again.

            var updateMessage = '';
            var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
            var showSplash = !corePreferences('sawSplash');

            if (sawPrivacyVersion !== context.privacyVersion) {
              updateMessage = _t('splash.privacy_update');
              showSplash = true;
            }

            if (!showSplash) return;
            corePreferences('sawSplash', true);
            corePreferences('sawPrivacyVersion', context.privacyVersion); // fetch intro graph data now, while user is looking at the splash screen

            _mainFileFetcher.get('intro_graph');
            var modalSelection = uiModal(selection);
            modalSelection.select('.modal').attr('class', 'modal-splash modal');
            var introModal = modalSelection.select('.content').append('div').attr('class', 'fillL');
            introModal.append('div').attr('class', 'modal-section').append('h3').html(_t.html('splash.welcome'));
            var modalSection = introModal.append('div').attr('class', 'modal-section');
            modalSection.append('p').html(_t.html('splash.text', {
              version: context.version,
              website: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/develop/CHANGELOG.md#whats-new">changelog</a>',
              github: '<a target="_blank" href="https://github.com/openstreetmap/iD/issues">github.com</a>'
            }));
            modalSection.append('p').html(_t.html('splash.privacy', {
              updateMessage: updateMessage,
              privacyLink: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/release/PRIVACY.md">' + _t('splash.privacy_policy') + '</a>'
            }));
            var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
            var walkthrough = buttonWrap.append('button').attr('class', 'walkthrough').on('click', function () {
              context.container().call(uiIntro(context));
              modalSelection.close();
            });
            walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
            walkthrough.append('div').html(_t.html('splash.walkthrough'));
            var startEditing = buttonWrap.append('button').attr('class', 'start-editing').on('click', modalSelection.close);
            startEditing.append('svg').attr('class', 'logo logo-features').append('use').attr('xlink:href', '#iD-logo-features');
            startEditing.append('div').html(_t.html('splash.start'));
            modalSelection.select('button.close').attr('class', 'hide');
          };
        }

        function uiStatus(context) {
          var osm = context.connection();
          return function (selection) {
            if (!osm) return;

            function update(err, apiStatus) {
              selection.html('');

              if (err) {
                if (apiStatus === 'connectionSwitched') {
                  // if the connection was just switched, we can't rely on
                  // the status (we're getting the status of the previous api)
                  return;
                } else if (apiStatus === 'rateLimited') {
                  selection.html(_t.html('osm_api_status.message.rateLimit')).append('a').attr('href', '#').attr('class', 'api-status-login').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('login')).on('click.login', function (d3_event) {
                    d3_event.preventDefault();
                    osm.authenticate();
                  });
                } else {
                  // don't allow retrying too rapidly
                  var throttledRetry = throttle(function () {
                    // try loading the visible tiles
                    context.loadTiles(context.projection); // manually reload the status too in case all visible tiles were already loaded

                    osm.reloadApiStatus();
                  }, 2000); // eslint-disable-next-line no-warning-comments
                  // TODO: nice messages for different error types


                  selection.html(_t.html('osm_api_status.message.error') + ' ').append('a').attr('href', '#') // let the user manually retry their connection directly
                  .html(_t.html('osm_api_status.retry')).on('click.retry', function (d3_event) {
                    d3_event.preventDefault();
                    throttledRetry();
                  });
                }
              } else if (apiStatus === 'readonly') {
                selection.html(_t.html('osm_api_status.message.readonly'));
              } else if (apiStatus === 'offline') {
                selection.html(_t.html('osm_api_status.message.offline'));
              }

              selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
            }

            osm.on('apiStatusChange.uiStatus', update); // reload the status periodically regardless of other factors

            window.setInterval(function () {
              osm.reloadApiStatus();
            }, 90000); // load the initial status in case no OSM data was loaded yet

            osm.reloadApiStatus();
          };
        }

        function modeDrawArea(context, wayID, startGraph, button) {
          var mode = {
            button: button,
            id: 'draw-area'
          };
          var behavior = behaviorDrawWay(context, wayID, mode, startGraph).on('rejectedSelfIntersection.modeDrawArea', function () {
            context.ui().flash.iconName('#iD-icon-no').label(_t('self_intersection.error.areas'))();
          });
          mode.wayID = wayID;

          mode.enter = function () {
            context.install(behavior);
          };

          mode.exit = function () {
            context.uninstall(behavior);
          };

          mode.selectedIDs = function () {
            return [wayID];
          };

          mode.activeID = function () {
            return behavior && behavior.activeID() || [];
          };

          return mode;
        }

        function modeAddArea(context, mode) {
          mode.id = 'add-area';
          var behavior = behaviorAddWay(context).on('start', start).on('startFromWay', startFromWay).on('startFromNode', startFromNode);
          var defaultTags = {
            area: 'yes'
          };
          if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'area');

          function actionClose(wayId) {
            return function (graph) {
              return graph.replace(graph.entity(wayId).close());
            };
          }

          function start(loc) {
            var startGraph = context.graph();
            var node = osmNode({
              loc: loc
            });
            var way = osmWay({
              tags: defaultTags
            });
            context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
            context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
          }

          function startFromWay(loc, edge) {
            var startGraph = context.graph();
            var node = osmNode({
              loc: loc
            });
            var way = osmWay({
              tags: defaultTags
            });
            context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id), actionAddMidpoint({
              loc: loc,
              edge: edge
            }, node));
            context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
          }

          function startFromNode(node) {
            var startGraph = context.graph();
            var way = osmWay({
              tags: defaultTags
            });
            context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
            context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
          }

          mode.enter = function () {
            context.install(behavior);
          };

          mode.exit = function () {
            context.uninstall(behavior);
          };

          return mode;
        }

        function modeAddLine(context, mode) {
          mode.id = 'add-line';
          var behavior = behaviorAddWay(context).on('start', start).on('startFromWay', startFromWay).on('startFromNode', startFromNode);
          var defaultTags = {};
          if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'line');

          function start(loc) {
            var startGraph = context.graph();
            var node = osmNode({
              loc: loc
            });
            var way = osmWay({
              tags: defaultTags
            });
            context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id));
            context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
          }

          function startFromWay(loc, edge) {
            var startGraph = context.graph();
            var node = osmNode({
              loc: loc
            });
            var way = osmWay({
              tags: defaultTags
            });
            context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionAddMidpoint({
              loc: loc,
              edge: edge
            }, node));
            context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
          }

          function startFromNode(node) {
            var startGraph = context.graph();
            var way = osmWay({
              tags: defaultTags
            });
            context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id));
            context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
          }

          mode.enter = function () {
            context.install(behavior);
          };

          mode.exit = function () {
            context.uninstall(behavior);
          };

          return mode;
        }

        function modeAddPoint(context, mode) {
          mode.id = 'add-point';
          var behavior = behaviorDraw(context).on('click', add).on('clickWay', addWay).on('clickNode', addNode).on('cancel', cancel).on('finish', cancel);
          var defaultTags = {};
          if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'point');

          function add(loc) {
            var node = osmNode({
              loc: loc,
              tags: defaultTags
            });
            context.perform(actionAddEntity(node), _t('operations.add.annotation.point'));
            enterSelectMode(node);
          }

          function addWay(loc, edge) {
            var node = osmNode({
              tags: defaultTags
            });
            context.perform(actionAddMidpoint({
              loc: loc,
              edge: edge
            }, node), _t('operations.add.annotation.vertex'));
            enterSelectMode(node);
          }

          function enterSelectMode(node) {
            context.enter(modeSelect(context, [node.id]).newFeature(true));
          }

          function addNode(node) {
            if (Object.keys(defaultTags).length === 0) {
              enterSelectMode(node);
              return;
            }

            var tags = Object.assign({}, node.tags); // shallow copy

            for (var key in defaultTags) {
              tags[key] = defaultTags[key];
            }

            context.perform(actionChangeTags(node.id, tags), _t('operations.add.annotation.point'));
            enterSelectMode(node);
          }

          function cancel() {
            context.enter(modeBrowse(context));
          }

          mode.enter = function () {
            context.install(behavior);
          };

          mode.exit = function () {
            context.uninstall(behavior);
          };

          return mode;
        }

        function modeSelectNote(context, selectedNoteID) {
          var mode = {
            id: 'select-note',
            button: 'browse'
          };

          var _keybinding = utilKeybinding('select-note');

          var _noteEditor = uiNoteEditor(context).on('change', function () {
            context.map().pan([0, 0]); // trigger a redraw

            var note = checkSelectedID();
            if (!note) return;
            context.ui().sidebar.show(_noteEditor.note(note));
          });

          var _behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
          var _newFeature = false;

          function checkSelectedID() {
            if (!services.osm) return;
            var note = services.osm.getNote(selectedNoteID);

            if (!note) {
              context.enter(modeBrowse(context));
            }

            return note;
          } // class the note as selected, or return to browse mode if the note is gone


          function selectNote(d3_event, drawn) {
            if (!checkSelectedID()) return;
            var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);

            if (selection.empty()) {
              // Return to browse mode if selected DOM elements have
              // disappeared because the user moved them out of view..
              var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;

              if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
                context.enter(modeBrowse(context));
              }
            } else {
              selection.classed('selected', true);
              context.selectedNoteID(selectedNoteID);
            }
          }

          function esc() {
            if (context.container().select('.combobox').size()) return;
            context.enter(modeBrowse(context));
          }

          mode.zoomToSelected = function () {
            if (!services.osm) return;
            var note = services.osm.getNote(selectedNoteID);

            if (note) {
              context.map().centerZoomEase(note.loc, 20);
            }
          };

          mode.newFeature = function (val) {
            if (!arguments.length) return _newFeature;
            _newFeature = val;
            return mode;
          };

          mode.enter = function () {
            var note = checkSelectedID();
            if (!note) return;

            _behaviors.forEach(context.install);

            _keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);

            select(document).call(_keybinding);
            selectNote();
            var sidebar = context.ui().sidebar;
            sidebar.show(_noteEditor.note(note).newNote(_newFeature)); // expand the sidebar, avoid obscuring the note if needed

            sidebar.expand(sidebar.intersects(note.extent()));
            context.map().on('drawn.select', selectNote);
          };

          mode.exit = function () {
            _behaviors.forEach(context.uninstall);

            select(document).call(_keybinding.unbind);
            context.surface().selectAll('.layer-notes .selected').classed('selected hover', false);
            context.map().on('drawn.select', null);
            context.ui().sidebar.hide();
            context.selectedNoteID(null);
          };

          return mode;
        }

        function modeAddNote(context) {
          var mode = {
            id: 'add-note',
            button: 'note',
            description: _t.html('modes.add_note.description'),
            key: _t('modes.add_note.key')
          };
          var behavior = behaviorDraw(context).on('click', add).on('cancel', cancel).on('finish', cancel);

          function add(loc) {
            var osm = services.osm;
            if (!osm) return;
            var note = osmNote({
              loc: loc,
              status: 'open',
              comments: []
            });
            osm.replaceNote(note); // force a reraw (there is no history change that would otherwise do this)

            context.map().pan([0, 0]);
            context.selectedNoteID(note.id).enter(modeSelectNote(context, note.id).newFeature(true));
          }

          function cancel() {
            context.enter(modeBrowse(context));
          }

          mode.enter = function () {
            context.install(behavior);
          };

          mode.exit = function () {
            context.uninstall(behavior);
          };

          return mode;
        }

        var JXON = new function () {
          var sValueProp = 'keyValue',
              sAttributesProp = 'keyAttributes',
              sAttrPref = '@',

          /* you can customize these values */
          aCache = [],
              rIsNull = /^\s*$/,
              rIsBool = /^(?:true|false)$/i;

          function parseText(sValue) {
            if (rIsNull.test(sValue)) {
              return null;
            }

            if (rIsBool.test(sValue)) {
              return sValue.toLowerCase() === 'true';
            }

            if (isFinite(sValue)) {
              return parseFloat(sValue);
            }

            if (isFinite(Date.parse(sValue))) {
              return new Date(sValue);
            }

            return sValue;
          }

          function EmptyTree() {}

          EmptyTree.prototype.toString = function () {
            return 'null';
          };

          EmptyTree.prototype.valueOf = function () {
            return null;
          };

          function objectify(vValue) {
            return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
          }

          function createObjTree(oParentNode, nVerb, bFreeze, bNesteAttr) {
            var nLevelStart = aCache.length,
                bChildren = oParentNode.hasChildNodes(),
                bAttributes = oParentNode.hasAttributes(),
                bHighVerb = Boolean(nVerb & 2);
            var sProp,
                vContent,
                nLength = 0,
                sCollectedTxt = '',
                vResult = bHighVerb ? {} :
            /* put here the default value for empty nodes: */
            true;

            if (bChildren) {
              for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
                oNode = oParentNode.childNodes.item(nItem);

                if (oNode.nodeType === 4) {
                  /* nodeType is 'CDATASection' (4) */
                  sCollectedTxt += oNode.nodeValue;
                } else if (oNode.nodeType === 3) {
                  /* nodeType is 'Text' (3) */
                  sCollectedTxt += oNode.nodeValue.trim();
                } else if (oNode.nodeType === 1 && !oNode.prefix) {
                  /* nodeType is 'Element' (1) */
                  aCache.push(oNode);
                }
              }
            }

            var nLevelEnd = aCache.length,
                vBuiltVal = parseText(sCollectedTxt);

            if (!bHighVerb && (bChildren || bAttributes)) {
              vResult = nVerb === 0 ? objectify(vBuiltVal) : {};
            }

            for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
              sProp = aCache[nElId].nodeName.toLowerCase();
              vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);

              if (vResult.hasOwnProperty(sProp)) {
                if (vResult[sProp].constructor !== Array) {
                  vResult[sProp] = [vResult[sProp]];
                }

                vResult[sProp].push(vContent);
              } else {
                vResult[sProp] = vContent;
                nLength++;
              }
            }

            if (bAttributes) {
              var nAttrLen = oParentNode.attributes.length,
                  sAPrefix = bNesteAttr ? '' : sAttrPref,
                  oAttrParent = bNesteAttr ? {} : vResult;

              for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
                oAttrib = oParentNode.attributes.item(nAttrib);
                oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
              }

              if (bNesteAttr) {
                if (bFreeze) {
                  Object.freeze(oAttrParent);
                }

                vResult[sAttributesProp] = oAttrParent;
                nLength -= nAttrLen - 1;
              }
            }

            if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
              vResult[sValueProp] = vBuiltVal;
            } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
              vResult = vBuiltVal;
            }

            if (bFreeze && (bHighVerb || nLength > 0)) {
              Object.freeze(vResult);
            }

            aCache.length = nLevelStart;
            return vResult;
          }

          function loadObjTree(oXMLDoc, oParentEl, oParentObj) {
            var vValue, oChild;

            if (oParentObj instanceof String || oParentObj instanceof Number || oParentObj instanceof Boolean) {
              oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toString()));
              /* verbosity level is 0 */
            } else if (oParentObj.constructor === Date) {
              oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toGMTString()));
            }

            for (var sName in oParentObj) {
              vValue = oParentObj[sName];

              if (isFinite(sName) || vValue instanceof Function) {
                continue;
              }
              /* verbosity level is 0 */


              if (sName === sValueProp) {
                if (vValue !== null && vValue !== true) {
                  oParentEl.appendChild(oXMLDoc.createTextNode(vValue.constructor === Date ? vValue.toGMTString() : String(vValue)));
                }
              } else if (sName === sAttributesProp) {
                /* verbosity level is 3 */
                for (var sAttrib in vValue) {
                  oParentEl.setAttribute(sAttrib, vValue[sAttrib]);
                }
              } else if (sName.charAt(0) === sAttrPref) {
                oParentEl.setAttribute(sName.slice(1), vValue);
              } else if (vValue.constructor === Array) {
                for (var nItem = 0; nItem < vValue.length; nItem++) {
                  oChild = oXMLDoc.createElement(sName);
                  loadObjTree(oXMLDoc, oChild, vValue[nItem]);
                  oParentEl.appendChild(oChild);
                }
              } else {
                oChild = oXMLDoc.createElement(sName);

                if (vValue instanceof Object) {
                  loadObjTree(oXMLDoc, oChild, vValue);
                } else if (vValue !== null && vValue !== true) {
                  oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
                }

                oParentEl.appendChild(oChild);
              }
            }
          }

          this.build = function (oXMLParent, nVerbosity
          /* optional */
          , bFreeze
          /* optional */
          , bNesteAttributes
          /* optional */
          ) {
            var _nVerb = arguments.length > 1 && typeof nVerbosity === 'number' ? nVerbosity & 3 :
            /* put here the default verbosity level: */
            1;

            return createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);
          };

          this.unbuild = function (oObjTree) {
            var oNewDoc = document.implementation.createDocument('', '', null);
            loadObjTree(oNewDoc, oNewDoc, oObjTree);
            return oNewDoc;
          };

          this.stringify = function (oObjTree) {
            return new XMLSerializer().serializeToString(JXON.unbuild(oObjTree));
          };
        }(); // var myObject = JXON.build(doc);
        // we got our javascript object! try: alert(JSON.stringify(myObject));
        // var newDoc = JXON.unbuild(myObject);
        // we got our Document instance! try: alert((new XMLSerializer()).serializeToString(newDoc));

        function uiConflicts(context) {
          var dispatch = dispatch$8('cancel', 'save');
          var keybinding = utilKeybinding('conflicts');

          var _origChanges;

          var _conflictList;

          var _shownConflictIndex;

          function keybindingOn() {
            select(document).call(keybinding.on('⎋', cancel, true));
          }

          function keybindingOff() {
            select(document).call(keybinding.unbind);
          }

          function tryAgain() {
            keybindingOff();
            dispatch.call('save');
          }

          function cancel() {
            keybindingOff();
            dispatch.call('cancel');
          }

          function conflicts(selection) {
            keybindingOn();
            var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
            headerEnter.append('button').attr('class', 'fr').on('click', cancel).call(svgIcon('#iD-icon-close'));
            headerEnter.append('h3').html(_t.html('save.conflict.header'));
            var bodyEnter = selection.selectAll('.body').data([0]).enter().append('div').attr('class', 'body fillL');
            var conflictsHelpEnter = bodyEnter.append('div').attr('class', 'conflicts-help').html(_t.html('save.conflict.help')); // Download changes link

            var detected = utilDetect();
            var changeset = new osmChangeset();
            delete changeset.id; // Export without changeset_id

            var data = JXON.stringify(changeset.osmChangeJXON(_origChanges));
            var blob = new Blob([data], {
              type: 'text/xml;charset=utf-8;'
            });
            var fileName = 'changes.osc';
            var linkEnter = conflictsHelpEnter.selectAll('.download-changes').append('a').attr('class', 'download-changes');

            if (detected.download) {
              // All except IE11 and Edge
              linkEnter // download the data as a file
              .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
            } else {
              // IE11 and Edge
              linkEnter // open data uri in a new tab
              .attr('target', '_blank').on('click.download', function () {
                navigator.msSaveBlob(blob, fileName);
              });
            }

            linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').html(_t.html('save.conflict.download_changes'));
            bodyEnter.append('div').attr('class', 'conflict-container fillL3').call(showConflict, 0);
            bodyEnter.append('div').attr('class', 'conflicts-done').attr('opacity', 0).style('display', 'none').html(_t.html('save.conflict.done'));
            var buttonsEnter = bodyEnter.append('div').attr('class', 'buttons col12 joined conflicts-buttons');
            buttonsEnter.append('button').attr('disabled', _conflictList.length > 1).attr('class', 'action conflicts-button col6').html(_t.html('save.title')).on('click.try_again', tryAgain);
            buttonsEnter.append('button').attr('class', 'secondary-action conflicts-button col6').html(_t.html('confirm.cancel')).on('click.cancel', cancel);
          }

          function showConflict(selection, index) {
            index = utilWrap(index, _conflictList.length);
            _shownConflictIndex = index;
            var parent = select(selection.node().parentNode); // enable save button if this is the last conflict being reviewed..

            if (index === _conflictList.length - 1) {
              window.setTimeout(function () {
                parent.select('.conflicts-button').attr('disabled', null);
                parent.select('.conflicts-done').transition().attr('opacity', 1).style('display', 'block');
              }, 250);
            }

            var conflict = selection.selectAll('.conflict').data([_conflictList[index]]);
            conflict.exit().remove();
            var conflictEnter = conflict.enter().append('div').attr('class', 'conflict');
            conflictEnter.append('h4').attr('class', 'conflict-count').html(_t.html('save.conflict.count', {
              num: index + 1,
              total: _conflictList.length
            }));
            conflictEnter.append('a').attr('class', 'conflict-description').attr('href', '#').html(function (d) {
              return d.name;
            }).on('click', function (d3_event, d) {
              d3_event.preventDefault();
              zoomToEntity(d.id);
            });
            var details = conflictEnter.append('div').attr('class', 'conflict-detail-container');
            details.append('ul').attr('class', 'conflict-detail-list').selectAll('li').data(function (d) {
              return d.details || [];
            }).enter().append('li').attr('class', 'conflict-detail-item').html(function (d) {
              return d;
            });
            details.append('div').attr('class', 'conflict-choices').call(addChoices);
            details.append('div').attr('class', 'conflict-nav-buttons joined cf').selectAll('button').data(['previous', 'next']).enter().append('button').html(function (d) {
              return _t.html('save.conflict.' + d);
            }).attr('class', 'conflict-nav-button action col6').attr('disabled', function (d, i) {
              return i === 0 && index === 0 || i === 1 && index === _conflictList.length - 1 || null;
            }).on('click', function (d3_event, d) {
              d3_event.preventDefault();
              var container = parent.selectAll('.conflict-container');
              var sign = d === 'previous' ? -1 : 1;
              container.selectAll('.conflict').remove();
              container.call(showConflict, index + sign);
            });
          }

          function addChoices(selection) {
            var choices = selection.append('ul').attr('class', 'layer-list').selectAll('li').data(function (d) {
              return d.choices || [];
            }); // enter

            var choicesEnter = choices.enter().append('li').attr('class', 'layer');
            var labelEnter = choicesEnter.append('label');
            labelEnter.append('input').attr('type', 'radio').attr('name', function (d) {
              return d.id;
            }).on('change', function (d3_event, d) {
              var ul = this.parentNode.parentNode.parentNode;
              ul.__data__.chosen = d.id;
              choose(d3_event, ul, d);
            });
            labelEnter.append('span').html(function (d) {
              return d.text;
            }); // update

            choicesEnter.merge(choices).each(function (d) {
              var ul = this.parentNode;

              if (ul.__data__.chosen === d.id) {
                choose(null, ul, d);
              }
            });
          }

          function choose(d3_event, ul, datum) {
            if (d3_event) d3_event.preventDefault();
            select(ul).selectAll('li').classed('active', function (d) {
              return d === datum;
            }).selectAll('input').property('checked', function (d) {
              return d === datum;
            });
            var extent = geoExtent();
            var entity;
            entity = context.graph().hasEntity(datum.id);
            if (entity) extent._extend(entity.extent(context.graph()));
            datum.action();
            entity = context.graph().hasEntity(datum.id);
            if (entity) extent._extend(entity.extent(context.graph()));
            zoomToEntity(datum.id, extent);
          }

          function zoomToEntity(id, extent) {
            context.surface().selectAll('.hover').classed('hover', false);
            var entity = context.graph().hasEntity(id);

            if (entity) {
              if (extent) {
                context.map().trimmedExtent(extent);
              } else {
                context.map().zoomToEase(entity);
              }

              context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph())).classed('hover', true);
            }
          } // The conflict list should be an array of objects like:
          // {
          //     id: id,
          //     name: entityName(local),
          //     details: merge.conflicts(),
          //     chosen: 1,
          //     choices: [
          //         choice(id, keepMine, forceLocal),
          //         choice(id, keepTheirs, forceRemote)
          //     ]
          // }


          conflicts.conflictList = function (_) {
            if (!arguments.length) return _conflictList;
            _conflictList = _;
            return conflicts;
          };

          conflicts.origChanges = function (_) {
            if (!arguments.length) return _origChanges;
            _origChanges = _;
            return conflicts;
          };

          conflicts.shownEntityIds = function () {
            if (_conflictList && typeof _shownConflictIndex === 'number') {
              return [_conflictList[_shownConflictIndex].id];
            }

            return [];
          };

          return utilRebind(conflicts, dispatch, 'on');
        }

        function uiConfirm(selection) {
          var modalSelection = uiModal(selection);
          modalSelection.select('.modal').classed('modal-alert', true);
          var section = modalSelection.select('.content');
          section.append('div').attr('class', 'modal-section header');
          section.append('div').attr('class', 'modal-section message-text');
          var buttons = section.append('div').attr('class', 'modal-section buttons cf');

          modalSelection.okButton = function () {
            buttons.append('button').attr('class', 'button ok-button action').on('click.confirm', function () {
              modalSelection.remove();
            }).html(_t.html('confirm.okay')).node().focus();
            return modalSelection;
          };

          return modalSelection;
        }

        function uiChangesetEditor(context) {
          var dispatch = dispatch$8('change');
          var formFields = uiFormFields(context);
          var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);

          var _fieldsArr;

          var _tags;

          var _changesetID;

          function changesetEditor(selection) {
            render(selection);
          }

          function render(selection) {
            var initial = false;

            if (!_fieldsArr) {
              initial = true;
              var presets = _mainPresetIndex;
              _fieldsArr = [uiField(context, presets.field('comment'), null, {
                show: true,
                revert: false
              }), uiField(context, presets.field('source'), null, {
                show: false,
                revert: false
              }), uiField(context, presets.field('hashtags'), null, {
                show: false,
                revert: false
              })];

              _fieldsArr.forEach(function (field) {
                field.on('change', function (t, onInput) {
                  dispatch.call('change', field, undefined, t, onInput);
                });
              });
            }

            _fieldsArr.forEach(function (field) {
              field.tags(_tags);
            });

            selection.call(formFields.fieldsArr(_fieldsArr));

            if (initial) {
              var commentField = selection.select('.form-field-comment textarea');
              var commentNode = commentField.node();

              if (commentNode) {
                commentNode.focus();
                commentNode.select();
              } // trigger a 'blur' event so that comment field can be cleaned
              // and checked for hashtags, even if retrieved from localstorage


              utilTriggerEvent(commentField, 'blur');
              var osm = context.connection();

              if (osm) {
                osm.userChangesets(function (err, changesets) {
                  if (err) return;
                  var comments = changesets.map(function (changeset) {
                    var comment = changeset.tags.comment;
                    return comment ? {
                      title: comment,
                      value: comment
                    } : null;
                  }).filter(Boolean);
                  commentField.call(commentCombo.data(utilArrayUniqBy(comments, 'title')));
                });
              }
            } // Add warning if comment mentions Google


            var hasGoogle = _tags.comment.match(/google/i);

            var commentWarning = selection.select('.form-field-comment').selectAll('.comment-warning').data(hasGoogle ? [0] : []);
            commentWarning.exit().transition().duration(200).style('opacity', 0).remove();
            var commentEnter = commentWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning comment-warning').style('opacity', 0);
            commentEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-alert', 'inline')).attr('href', _t('commit.google_warning_link')).append('span').html(_t.html('commit.google_warning'));
            commentEnter.transition().duration(200).style('opacity', 1);
          }

          changesetEditor.tags = function (_) {
            if (!arguments.length) return _tags;
            _tags = _; // Don't reset _fieldsArr here.

            return changesetEditor;
          };

          changesetEditor.changesetID = function (_) {
            if (!arguments.length) return _changesetID;
            if (_changesetID === _) return changesetEditor;
            _changesetID = _;
            _fieldsArr = null;
            return changesetEditor;
          };

          return utilRebind(changesetEditor, dispatch, 'on');
        }

        function uiSectionChanges(context) {
          var detected = utilDetect();
          var _discardTags = {};
          _mainFileFetcher.get('discarded').then(function (d) {
            _discardTags = d;
          })["catch"](function () {
            /* ignore */
          });
          var section = uiSection('changes-list', context).label(function () {
            var history = context.history();
            var summary = history.difference().summary();
            return _t('inspector.title_count', {
              title: _t.html('commit.changes'),
              count: summary.length
            });
          }).disclosureContent(renderDisclosureContent);

          function renderDisclosureContent(selection) {
            var history = context.history();
            var summary = history.difference().summary();
            var container = selection.selectAll('.commit-section').data([0]);
            var containerEnter = container.enter().append('div').attr('class', 'commit-section');
            containerEnter.append('ul').attr('class', 'changeset-list');
            container = containerEnter.merge(container);
            var items = container.select('ul').selectAll('li').data(summary);
            var itemsEnter = items.enter().append('li').attr('class', 'change-item');
            var buttons = itemsEnter.append('button').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
            buttons.each(function (d) {
              select(this).call(svgIcon('#iD-icon-' + d.entity.geometry(d.graph), 'pre-text ' + d.changeType));
            });
            buttons.append('span').attr('class', 'change-type').html(function (d) {
              return _t.html('commit.' + d.changeType) + ' ';
            });
            buttons.append('strong').attr('class', 'entity-type').html(function (d) {
              var matched = _mainPresetIndex.match(d.entity, d.graph);
              return matched && matched.name() || utilDisplayType(d.entity.id);
            });
            buttons.append('span').attr('class', 'entity-name').html(function (d) {
              var name = utilDisplayName(d.entity) || '',
                  string = '';

              if (name !== '') {
                string += ':';
              }

              return string += ' ' + name;
            });
            items = itemsEnter.merge(items); // Download changeset link

            var changeset = new osmChangeset().update({
              id: undefined
            });
            var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
            delete changeset.id; // Export without chnageset_id

            var data = JXON.stringify(changeset.osmChangeJXON(changes));
            var blob = new Blob([data], {
              type: 'text/xml;charset=utf-8;'
            });
            var fileName = 'changes.osc';
            var linkEnter = container.selectAll('.download-changes').data([0]).enter().append('a').attr('class', 'download-changes');

            if (detected.download) {
              // All except IE11 and Edge
              linkEnter // download the data as a file
              .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
            } else {
              // IE11 and Edge
              linkEnter // open data uri in a new tab
              .attr('target', '_blank').on('click.download', function () {
                navigator.msSaveBlob(blob, fileName);
              });
            }

            linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').html(_t.html('commit.download_changes'));

            function mouseover(d) {
              if (d.entity) {
                context.surface().selectAll(utilEntityOrMemberSelector([d.entity.id], context.graph())).classed('hover', true);
              }
            }

            function mouseout() {
              context.surface().selectAll('.hover').classed('hover', false);
            }

            function click(d3_event, change) {
              if (change.changeType !== 'deleted') {
                var entity = change.entity;
                context.map().zoomToEase(entity);
                context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph())).classed('hover', true);
              }
            }
          }

          return section;
        }

        function uiCommitWarnings(context) {
          function commitWarnings(selection) {
            var issuesBySeverity = context.validator().getIssuesBySeverity({
              what: 'edited',
              where: 'all',
              includeDisabledRules: true
            });

            for (var severity in issuesBySeverity) {
              var issues = issuesBySeverity[severity];

              if (severity !== 'error') {
                // exclude 'fixme' and similar - #8603
                issues = issues.filter(function (issue) {
                  return issue.type !== 'help_request';
                });
              }

              var section = severity + '-section';
              var issueItem = severity + '-item';
              var container = selection.selectAll('.' + section).data(issues.length ? [0] : []);
              container.exit().remove();
              var containerEnter = container.enter().append('div').attr('class', 'modal-section ' + section + ' fillL2');
              containerEnter.append('h3').html(severity === 'warning' ? _t.html('commit.warnings') : _t.html('commit.errors'));
              containerEnter.append('ul').attr('class', 'changeset-list');
              container = containerEnter.merge(container);
              var items = container.select('ul').selectAll('li').data(issues, function (d) {
                return d.id;
              });
              items.exit().remove();
              var itemsEnter = items.enter().append('li').attr('class', issueItem);
              var buttons = itemsEnter.append('button').on('mouseover', function (d3_event, d) {
                if (d.entityIds) {
                  context.surface().selectAll(utilEntityOrMemberSelector(d.entityIds, context.graph())).classed('hover', true);
                }
              }).on('mouseout', function () {
                context.surface().selectAll('.hover').classed('hover', false);
              }).on('click', function (d3_event, d) {
                context.validator().focusIssue(d);
              });
              buttons.call(svgIcon('#iD-icon-alert', 'pre-text'));
              buttons.append('strong').attr('class', 'issue-message');
              buttons.filter(function (d) {
                return d.tooltip;
              }).call(uiTooltip().title(function (d) {
                return d.tooltip;
              }).placement('top'));
              items = itemsEnter.merge(items);
              items.selectAll('.issue-message').html(function (d) {
                return d.message(context);
              });
            }
          }

          return commitWarnings;
        }

        var readOnlyTags = [/^changesets_count$/, /^created_by$/, /^ideditor:/, /^imagery_used$/, /^host$/, /^locale$/, /^warnings:/, /^resolved:/, /^closed:note$/, /^closed:keepright$/, /^closed:improveosm:/, /^closed:osmose:/]; // treat most punctuation (except -, _, +, &) as hashtag delimiters - #4398
        // from https://stackoverflow.com/a/25575009

        var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
        function uiCommit(context) {
          var dispatch = dispatch$8('cancel');

          var _userDetails;

          var _selection;

          var changesetEditor = uiChangesetEditor(context).on('change', changeTags);
          var rawTagEditor = uiSectionRawTagEditor('changeset-tag-editor', context).on('change', changeTags).readOnlyTags(readOnlyTags);
          var commitChanges = uiSectionChanges(context);
          var commitWarnings = uiCommitWarnings(context);

          function commit(selection) {
            _selection = selection; // Initialize changeset if one does not exist yet.

            if (!context.changeset) initChangeset();
            loadDerivedChangesetTags();
            selection.call(render);
          }

          function initChangeset() {
            // expire stored comment, hashtags, source after cutoff datetime - #3947 #4899
            var commentDate = +corePreferences('commentDate') || 0;
            var currDate = Date.now();
            var cutoff = 2 * 86400 * 1000; // 2 days

            if (commentDate > currDate || currDate - commentDate > cutoff) {
              corePreferences('comment', null);
              corePreferences('hashtags', null);
              corePreferences('source', null);
            } // load in explicitly-set values, if any


            if (context.defaultChangesetComment()) {
              corePreferences('comment', context.defaultChangesetComment());
              corePreferences('commentDate', Date.now());
            }

            if (context.defaultChangesetSource()) {
              corePreferences('source', context.defaultChangesetSource());
              corePreferences('commentDate', Date.now());
            }

            if (context.defaultChangesetHashtags()) {
              corePreferences('hashtags', context.defaultChangesetHashtags());
              corePreferences('commentDate', Date.now());
            }

            var detected = utilDetect();
            var tags = {
              comment: corePreferences('comment') || '',
              created_by: context.cleanTagValue('iD ' + context.version),
              host: context.cleanTagValue(detected.host),
              locale: context.cleanTagValue(_mainLocalizer.localeCode())
            }; // call findHashtags initially - this will remove stored
            // hashtags if any hashtags are found in the comment - #4304

            findHashtags(tags, true);
            var hashtags = corePreferences('hashtags');

            if (hashtags) {
              tags.hashtags = hashtags;
            }

            var source = corePreferences('source');

            if (source) {
              tags.source = source;
            }

            var photoOverlaysUsed = context.history().photoOverlaysUsed();

            if (photoOverlaysUsed.length) {
              var sources = (tags.source || '').split(';'); // include this tag for any photo layer

              if (sources.indexOf('streetlevel imagery') === -1) {
                sources.push('streetlevel imagery');
              } // add the photo overlays used during editing as sources


              photoOverlaysUsed.forEach(function (photoOverlay) {
                if (sources.indexOf(photoOverlay) === -1) {
                  sources.push(photoOverlay);
                }
              });
              tags.source = context.cleanTagValue(sources.join(';'));
            }

            context.changeset = new osmChangeset({
              tags: tags
            });
          } // Calculates read-only metadata tags based on the user's editing session and applies
          // them to the changeset.


          function loadDerivedChangesetTags() {
            var osm = context.connection();
            if (!osm) return;
            var tags = Object.assign({}, context.changeset.tags); // shallow copy
            // assign tags for imagery used

            var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
            tags.imagery_used = imageryUsed || 'None'; // assign tags for closed issues and notes

            var osmClosed = osm.getClosedIDs();
            var itemType;

            if (osmClosed.length) {
              tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
            }

            if (services.keepRight) {
              var krClosed = services.keepRight.getClosedIDs();

              if (krClosed.length) {
                tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
              }
            }

            if (services.improveOSM) {
              var iOsmClosed = services.improveOSM.getClosedCounts();

              for (itemType in iOsmClosed) {
                tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
              }
            }

            if (services.osmose) {
              var osmoseClosed = services.osmose.getClosedCounts();

              for (itemType in osmoseClosed) {
                tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
              }
            } // remove existing issue counts


            for (var key in tags) {
              if (key.match(/(^warnings:)|(^resolved:)/)) {
                delete tags[key];
              }
            }

            function addIssueCounts(issues, prefix) {
              var issuesByType = utilArrayGroupBy(issues, 'type');

              for (var issueType in issuesByType) {
                var issuesOfType = issuesByType[issueType];

                if (issuesOfType[0].subtype) {
                  var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');

                  for (var issueSubtype in issuesBySubtype) {
                    var issuesOfSubtype = issuesBySubtype[issueSubtype];
                    tags[prefix + ':' + issueType + ':' + issueSubtype] = context.cleanTagValue(issuesOfSubtype.length.toString());
                  }
                } else {
                  tags[prefix + ':' + issueType] = context.cleanTagValue(issuesOfType.length.toString());
                }
              }
            } // add counts of warnings generated by the user's edits


            var warnings = context.validator().getIssuesBySeverity({
              what: 'edited',
              where: 'all',
              includeIgnored: true,
              includeDisabledRules: true
            }).warning.filter(function (issue) {
              return issue.type !== 'help_request';
            }); // exclude 'fixme' and similar - #8603

            addIssueCounts(warnings, 'warnings'); // add counts of issues resolved by the user's edits

            var resolvedIssues = context.validator().getResolvedIssues();
            addIssueCounts(resolvedIssues, 'resolved');
            context.changeset = context.changeset.update({
              tags: tags
            });
          }

          function render(selection) {
            var osm = context.connection();
            if (!osm) return;
            var header = selection.selectAll('.header').data([0]);
            var headerTitle = header.enter().append('div').attr('class', 'header fillL');
            headerTitle.append('div').append('h3').html(_t.html('commit.title'));
            headerTitle.append('button').attr('class', 'close').on('click', function () {
              dispatch.call('cancel', this);
            }).call(svgIcon('#iD-icon-close'));
            var body = selection.selectAll('.body').data([0]);
            body = body.enter().append('div').attr('class', 'body').merge(body); // Changeset Section

            var changesetSection = body.selectAll('.changeset-editor').data([0]);
            changesetSection = changesetSection.enter().append('div').attr('class', 'modal-section changeset-editor').merge(changesetSection);
            changesetSection.call(changesetEditor.changesetID(context.changeset.id).tags(context.changeset.tags)); // Warnings

            body.call(commitWarnings); // Upload Explanation

            var saveSection = body.selectAll('.save-section').data([0]);
            saveSection = saveSection.enter().append('div').attr('class', 'modal-section save-section fillL').merge(saveSection);
            var prose = saveSection.selectAll('.commit-info').data([0]);

            if (prose.enter().size()) {
              // first time, make sure to update user details in prose
              _userDetails = null;
            }

            prose = prose.enter().append('p').attr('class', 'commit-info').html(_t.html('commit.upload_explanation')).merge(prose); // always check if this has changed, but only update prose.html()
            // if needed, because it can trigger a style recalculation

            osm.userDetails(function (err, user) {
              if (err) return;
              if (_userDetails === user) return; // no change

              _userDetails = user;
              var userLink = select(document.createElement('div'));

              if (user.image_url) {
                userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
              }

              userLink.append('a').attr('class', 'user-info').html(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
              prose.html(_t.html('commit.upload_explanation_with_user', {
                user: userLink.html()
              }));
            }); // Request Review

            var requestReview = saveSection.selectAll('.request-review').data([0]); // Enter

            var requestReviewEnter = requestReview.enter().append('div').attr('class', 'request-review');
            var requestReviewDomId = utilUniqueDomId('commit-input-request-review');
            var labelEnter = requestReviewEnter.append('label').attr('for', requestReviewDomId);

            if (!labelEnter.empty()) {
              labelEnter.call(uiTooltip().title(_t.html('commit.request_review_info')).placement('top'));
            }

            labelEnter.append('input').attr('type', 'checkbox').attr('id', requestReviewDomId);
            labelEnter.append('span').html(_t.html('commit.request_review')); // Update

            requestReview = requestReview.merge(requestReviewEnter);
            var requestReviewInput = requestReview.selectAll('input').property('checked', isReviewRequested(context.changeset.tags)).on('change', toggleRequestReview); // Buttons

            var buttonSection = saveSection.selectAll('.buttons').data([0]); // enter

            var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons fillL');
            buttonEnter.append('button').attr('class', 'secondary-action button cancel-button').append('span').attr('class', 'label').html(_t.html('commit.cancel'));
            var uploadButton = buttonEnter.append('button').attr('class', 'action button save-button');
            uploadButton.append('span').attr('class', 'label').html(_t.html('commit.save'));
            var uploadBlockerTooltipText = getUploadBlockerMessage(); // update

            buttonSection = buttonSection.merge(buttonEnter);
            buttonSection.selectAll('.cancel-button').on('click.cancel', function () {
              dispatch.call('cancel', this);
            });
            buttonSection.selectAll('.save-button').classed('disabled', uploadBlockerTooltipText !== null).on('click.save', function () {
              if (!select(this).classed('disabled')) {
                this.blur(); // avoid keeping focus on the button - #4641

                for (var key in context.changeset.tags) {
                  // remove any empty keys before upload
                  if (!key) delete context.changeset.tags[key];
                }

                context.uploader().save(context.changeset);
              }
            }); // remove any existing tooltip

            uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));

            if (uploadBlockerTooltipText) {
              buttonSection.selectAll('.save-button').call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
            } // Raw Tag Editor


            var tagSection = body.selectAll('.tag-section.raw-tag-editor').data([0]);
            tagSection = tagSection.enter().append('div').attr('class', 'modal-section tag-section raw-tag-editor').merge(tagSection);
            tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
            .render);
            var changesSection = body.selectAll('.commit-changes-section').data([0]);
            changesSection = changesSection.enter().append('div').attr('class', 'modal-section commit-changes-section').merge(changesSection); // Change summary

            changesSection.call(commitChanges.render);

            function toggleRequestReview() {
              var rr = requestReviewInput.property('checked');
              updateChangeset({
                review_requested: rr ? 'yes' : undefined
              });
              tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
              .render);
            }
          }

          function getUploadBlockerMessage() {
            var errors = context.validator().getIssuesBySeverity({
              what: 'edited',
              where: 'all'
            }).error;

            if (errors.length) {
              return _t('commit.outstanding_errors_message', {
                count: errors.length
              });
            } else {
              var hasChangesetComment = context.changeset && context.changeset.tags.comment && context.changeset.tags.comment.trim().length;

              if (!hasChangesetComment) {
                return _t('commit.comment_needed_message');
              }
            }

            return null;
          }

          function changeTags(_, changed, onInput) {
            if (changed.hasOwnProperty('comment')) {
              if (changed.comment === undefined) {
                changed.comment = '';
              }

              if (!onInput) {
                corePreferences('comment', changed.comment);
                corePreferences('commentDate', Date.now());
              }
            }

            if (changed.hasOwnProperty('source')) {
              if (changed.source === undefined) {
                corePreferences('source', null);
              } else if (!onInput) {
                corePreferences('source', changed.source);
                corePreferences('commentDate', Date.now());
              }
            } // no need to update `prefs` for `hashtags` here since it's done in `updateChangeset`


            updateChangeset(changed, onInput);

            if (_selection) {
              _selection.call(render);
            }
          }

          function findHashtags(tags, commentOnly) {
            var detectedHashtags = commentHashtags();

            if (detectedHashtags.length) {
              // always remove stored hashtags if there are hashtags in the comment - #4304
              corePreferences('hashtags', null);
            }

            if (!detectedHashtags.length || !commentOnly) {
              detectedHashtags = detectedHashtags.concat(hashtagHashtags());
            }

            var allLowerCase = new Set();
            return detectedHashtags.filter(function (hashtag) {
              // Compare tags as lowercase strings, but keep original case tags
              var lowerCase = hashtag.toLowerCase();

              if (!allLowerCase.has(lowerCase)) {
                allLowerCase.add(lowerCase);
                return true;
              }

              return false;
            }); // Extract hashtags from `comment`

            function commentHashtags() {
              var matches = (tags.comment || '').replace(/http\S*/g, '') // drop anything that looks like a URL - #4289
              .match(hashtagRegex);
              return matches || [];
            } // Extract and clean hashtags from `hashtags`


            function hashtagHashtags() {
              var matches = (tags.hashtags || '').split(/[,;\s]+/).map(function (s) {
                if (s[0] !== '#') {
                  s = '#' + s;
                } // prepend '#'


                var matched = s.match(hashtagRegex);
                return matched && matched[0];
              }).filter(Boolean); // exclude falsy

              return matches || [];
            }
          }

          function isReviewRequested(tags) {
            var rr = tags.review_requested;
            if (rr === undefined) return false;
            rr = rr.trim().toLowerCase();
            return !(rr === '' || rr === 'no');
          }

          function updateChangeset(changed, onInput) {
            var tags = Object.assign({}, context.changeset.tags); // shallow copy

            Object.keys(changed).forEach(function (k) {
              var v = changed[k];
              k = context.cleanTagKey(k);
              if (readOnlyTags.indexOf(k) !== -1) return;

              if (v === undefined) {
                delete tags[k];
              } else if (onInput) {
                tags[k] = v;
              } else {
                tags[k] = context.cleanTagValue(v);
              }
            });

            if (!onInput) {
              // when changing the comment, override hashtags with any found in comment.
              var commentOnly = changed.hasOwnProperty('comment') && changed.comment !== '';
              var arr = findHashtags(tags, commentOnly);

              if (arr.length) {
                tags.hashtags = context.cleanTagValue(arr.join(';'));
                corePreferences('hashtags', tags.hashtags);
              } else {
                delete tags.hashtags;
                corePreferences('hashtags', null);
              }
            } // always update userdetails, just in case user reauthenticates as someone else


            if (_userDetails && _userDetails.changesets_count !== undefined) {
              var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1; // #4283

              tags.changesets_count = String(changesetsCount); // first 100 edits - new user

              if (changesetsCount <= 100) {
                var s;
                s = corePreferences('walkthrough_completed');

                if (s) {
                  tags['ideditor:walkthrough_completed'] = s;
                }

                s = corePreferences('walkthrough_progress');

                if (s) {
                  tags['ideditor:walkthrough_progress'] = s;
                }

                s = corePreferences('walkthrough_started');

                if (s) {
                  tags['ideditor:walkthrough_started'] = s;
                }
              }
            } else {
              delete tags.changesets_count;
            }

            if (!fastDeepEqual(context.changeset.tags, tags)) {
              context.changeset = context.changeset.update({
                tags: tags
              });
            }
          }

          commit.reset = function () {
            context.changeset = null;
          };

          return utilRebind(commit, dispatch, 'on');
        }

        // for punction see https://stackoverflow.com/a/21224179

        function simplify(str) {
          if (typeof str !== 'string') return '';
          return diacritics.remove(str.replace(/&/g, 'and').replace(/İ/ig, 'i').replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>«»~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u200b-\u200f\u2016\u2017\u2020-\u2027\u2030-\u2038\u203b-\u203e\u2041-\u2043\u2047-\u2051\u2053\u2055-\u205e\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00\u2e01\u2e06-\u2e08\u2e0b\u2e0e-\u2e16\u2e18\u2e19\u2e1b\u2e1e\u2e1f\u2e2a-\u2e2e\u2e30-\u2e39\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\ufeff\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g, '').toLowerCase());
        }

        // `resolveStrings`
        // Resolves the text strings for a given community index item
        //
        // Arguments
        //   `item`:  Object containing the community index item
        //   `defaults`: Object containing the community index default strings
        //   `localizerFn?`: optional function we will call to do the localization.
        //      This function should be like the iD `t()` function that
        //      accepts a `stringID` and returns a localized string
        //
        // Returns
        //   An Object containing all the resolved strings:
        //   {
        //     name:                     'talk-ru Mailing List',
        //     url:                      'https://lists.openstreetmap.org/listinfo/talk-ru',
        //     signupUrl:                'https://example.url/signup',
        //     description:              'A one line description',
        //     extendedDescription:      'Extended description',
        //     nameHTML:                 '<a href="the url">the name</a>',
        //     urlHTML:                  '<a href="the url">the url</a>',
        //     signupUrlHTML:            '<a href="the signupUrl">the signupUrl</a>',
        //     descriptionHTML:          the description, with urls and signupUrls linkified,
        //     extendedDescriptionHTML:  the extendedDescription with urls and signupUrls linkified
        //   }
        //

        function resolveStrings(item, defaults, localizerFn) {
          var itemStrings = Object.assign({}, item.strings); // shallow clone

          var defaultStrings = Object.assign({}, defaults[item.type]); // shallow clone

          var anyToken = new RegExp(/(\{\w+\})/, 'gi'); // Pre-localize the item and default strings

          if (localizerFn) {
            if (itemStrings.community) {
              var communityID = simplify(itemStrings.community);
              itemStrings.community = localizerFn("_communities.".concat(communityID));
            }

            ['name', 'description', 'extendedDescription'].forEach(function (prop) {
              if (defaultStrings[prop]) defaultStrings[prop] = localizerFn("_defaults.".concat(item.type, ".").concat(prop));
              if (itemStrings[prop]) itemStrings[prop] = localizerFn("".concat(item.id, ".").concat(prop));
            });
          }

          var replacements = {
            account: item.account,
            community: itemStrings.community,
            signupUrl: itemStrings.signupUrl,
            url: itemStrings.url
          }; // Resolve URLs first (which may refer to {account})

          if (!replacements.signupUrl) {
            replacements.signupUrl = resolve(itemStrings.signupUrl || defaultStrings.signupUrl);
          }

          if (!replacements.url) {
            replacements.url = resolve(itemStrings.url || defaultStrings.url);
          }

          var resolved = {
            name: resolve(itemStrings.name || defaultStrings.name),
            url: resolve(itemStrings.url || defaultStrings.url),
            signupUrl: resolve(itemStrings.signupUrl || defaultStrings.signupUrl),
            description: resolve(itemStrings.description || defaultStrings.description),
            extendedDescription: resolve(itemStrings.extendedDescription || defaultStrings.extendedDescription)
          }; // Generate linkified strings

          resolved.nameHTML = linkify(resolved.url, resolved.name);
          resolved.urlHTML = linkify(resolved.url);
          resolved.signupUrlHTML = linkify(resolved.signupUrl);
          resolved.descriptionHTML = resolve(itemStrings.description || defaultStrings.description, true);
          resolved.extendedDescriptionHTML = resolve(itemStrings.extendedDescription || defaultStrings.extendedDescription, true);
          return resolved;

          function resolve(s, addLinks) {
            if (!s) return undefined;
            var result = s;

            for (var key in replacements) {
              var token = "{".concat(key, "}");
              var regex = new RegExp(token, 'g');

              if (regex.test(result)) {
                var replacement = replacements[key];

                if (!replacement) {
                  throw new Error("Cannot resolve token: ".concat(token));
                } else {
                  if (addLinks && (key === 'signupUrl' || key === 'url')) {
                    replacement = linkify(replacement);
                  }

                  result = result.replace(regex, replacement);
                }
              }
            } // There shouldn't be any leftover tokens in a resolved string


            var leftovers = result.match(anyToken);

            if (leftovers) {
              throw new Error("Cannot resolve tokens: ".concat(leftovers));
            } // Linkify subreddits like `/r/openstreetmap`
            // https://github.com/osmlab/osm-community-index/issues/82
            // https://github.com/openstreetmap/iD/issues/4997


            if (addLinks && item.type === 'reddit') {
              result = result.replace(/(\/r\/\w+\/*)/i, function (match) {
                return linkify(resolved.url, match);
              });
            }

            return result;
          }

          function linkify(url, text) {
            if (!url) return undefined;
            text = text || url;
            return "<a target=\"_blank\" href=\"".concat(url, "\">").concat(text, "</a>");
          }
        }

        var _oci = null;
        function uiSuccess(context) {
          var MAXEVENTS = 2;
          var dispatch = dispatch$8('cancel');

          var _changeset;

          var _location;

          ensureOSMCommunityIndex(); // start fetching the data

          function ensureOSMCommunityIndex() {
            var data = _mainFileFetcher;
            return Promise.all([data.get('oci_features'), data.get('oci_resources'), data.get('oci_defaults')]).then(function (vals) {
              if (_oci) return _oci; // Merge Custom Features

              if (vals[0] && Array.isArray(vals[0].features)) {
                _mainLocations.mergeCustomGeoJSON(vals[0]);
              }

              var ociResources = Object.values(vals[1].resources);

              if (ociResources.length) {
                // Resolve all locationSet features.
                return _mainLocations.mergeLocationSets(ociResources).then(function () {
                  _oci = {
                    resources: ociResources,
                    defaults: vals[2].defaults
                  };
                  return _oci;
                });
              } else {
                _oci = {
                  resources: [],
                  // no resources?
                  defaults: vals[2].defaults
                };
                return _oci;
              }
            });
          } // string-to-date parsing in JavaScript is weird


          function parseEventDate(when) {
            if (!when) return;
            var raw = when.trim();
            if (!raw) return;

            if (!/Z$/.test(raw)) {
              // if no trailing 'Z', add one
              raw += 'Z'; // this forces date to be parsed as a UTC date
            }

            var parsed = new Date(raw);
            return new Date(parsed.toUTCString().substr(0, 25)); // convert to local timezone
          }

          function success(selection) {
            var header = selection.append('div').attr('class', 'header fillL');
            header.append('h3').html(_t.html('success.just_edited'));
            header.append('button').attr('class', 'close').on('click', function () {
              return dispatch.call('cancel');
            }).call(svgIcon('#iD-icon-close'));
            var body = selection.append('div').attr('class', 'body save-success fillL');
            var summary = body.append('div').attr('class', 'save-summary');
            summary.append('h3').html(_t.html('success.thank_you' + (_location ? '_location' : ''), {
              where: _location
            }));
            summary.append('p').html(_t.html('success.help_html')).append('a').attr('class', 'link-out').attr('target', '_blank').attr('href', _t('success.help_link_url')).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('success.help_link_text'));
            var osm = context.connection();
            if (!osm) return;
            var changesetURL = osm.changesetURL(_changeset.id);
            var table = summary.append('table').attr('class', 'summary-table');
            var row = table.append('tr').attr('class', 'summary-row');
            row.append('td').attr('class', 'cell-icon summary-icon').append('a').attr('target', '_blank').attr('href', changesetURL).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', '#iD-logo-osm');
            var summaryDetail = row.append('td').attr('class', 'cell-detail summary-detail');
            summaryDetail.append('a').attr('class', 'cell-detail summary-view-on-osm').attr('target', '_blank').attr('href', changesetURL).html(_t.html('success.view_on_osm'));
            summaryDetail.append('div').html(_t.html('success.changeset_id', {
              changeset_id: "<a href=\"".concat(changesetURL, "\" target=\"_blank\">").concat(_changeset.id, "</a>")
            })); // Get OSM community index features intersecting the map..

            ensureOSMCommunityIndex().then(function (oci) {
              var loc = context.map().center();
              var validLocations = _mainLocations.locationsAt(loc); // Gather the communities

              var communities = [];
              oci.resources.forEach(function (resource) {
                var area = validLocations[resource.locationSetID];
                if (!area) return; // Resolve strings

                var localizer = function localizer(stringID) {
                  return _t.html("community.".concat(stringID));
                };

                resource.resolved = resolveStrings(resource, oci.defaults, localizer);
                communities.push({
                  area: area,
                  order: resource.order || 0,
                  resource: resource
                });
              }); // sort communities by feature area ascending, community order descending

              communities.sort(function (a, b) {
                return a.area - b.area || b.order - a.order;
              });
              body.call(showCommunityLinks, communities.map(function (c) {
                return c.resource;
              }));
            });
          }

          function showCommunityLinks(selection, resources) {
            var communityLinks = selection.append('div').attr('class', 'save-communityLinks');
            communityLinks.append('h3').html(_t.html('success.like_osm'));
            var table = communityLinks.append('table').attr('class', 'community-table');
            var row = table.selectAll('.community-row').data(resources);
            var rowEnter = row.enter().append('tr').attr('class', 'community-row');
            rowEnter.append('td').attr('class', 'cell-icon community-icon').append('a').attr('target', '_blank').attr('href', function (d) {
              return d.resolved.url;
            }).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', function (d) {
              return "#community-".concat(d.type);
            });
            var communityDetail = rowEnter.append('td').attr('class', 'cell-detail community-detail');
            communityDetail.each(showCommunityDetails);
            communityLinks.append('div').attr('class', 'community-missing').html(_t.html('success.missing')).append('a').attr('class', 'link-out').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmlab/osm-community-index/issues').append('span').html(_t.html('success.tell_us'));
          }

          function showCommunityDetails(d) {
            var selection = select(this);
            var communityID = d.id;
            selection.append('div').attr('class', 'community-name').html(d.resolved.nameHTML);
            selection.append('div').attr('class', 'community-description').html(d.resolved.descriptionHTML); // Create an expanding section if any of these are present..

            if (d.resolved.extendedDescriptionHTML || d.languageCodes && d.languageCodes.length) {
              selection.append('div').call(uiDisclosure(context, "community-more-".concat(d.id), false).expanded(false).updatePreference(false).label(_t.html('success.more')).content(showMore));
            }

            var nextEvents = (d.events || []).map(function (event) {
              event.date = parseEventDate(event.when);
              return event;
            }).filter(function (event) {
              // date is valid and future (or today)
              var t = event.date.getTime();
              var now = new Date().setHours(0, 0, 0, 0);
              return !isNaN(t) && t >= now;
            }).sort(function (a, b) {
              // sort by date ascending
              return a.date < b.date ? -1 : a.date > b.date ? 1 : 0;
            }).slice(0, MAXEVENTS); // limit number of events shown

            if (nextEvents.length) {
              selection.append('div').call(uiDisclosure(context, "community-events-".concat(d.id), false).expanded(false).updatePreference(false).label(_t.html('success.events')).content(showNextEvents)).select('.hide-toggle').append('span').attr('class', 'badge-text').html(nextEvents.length);
            }

            function showMore(selection) {
              var more = selection.selectAll('.community-more').data([0]);
              var moreEnter = more.enter().append('div').attr('class', 'community-more');

              if (d.resolved.extendedDescriptionHTML) {
                moreEnter.append('div').attr('class', 'community-extended-description').html(d.resolved.extendedDescriptionHTML);
              }

              if (d.languageCodes && d.languageCodes.length) {
                var languageList = d.languageCodes.map(function (code) {
                  return _mainLocalizer.languageName(code);
                }).join(', ');
                moreEnter.append('div').attr('class', 'community-languages').html(_t.html('success.languages', {
                  languages: languageList
                }));
              }
            }

            function showNextEvents(selection) {
              var events = selection.append('div').attr('class', 'community-events');
              var item = events.selectAll('.community-event').data(nextEvents);
              var itemEnter = item.enter().append('div').attr('class', 'community-event');
              itemEnter.append('div').attr('class', 'community-event-name').append('a').attr('target', '_blank').attr('href', function (d) {
                return d.url;
              }).html(function (d) {
                var name = d.name;

                if (d.i18n && d.id) {
                  name = _t("community.".concat(communityID, ".events.").concat(d.id, ".name"), {
                    "default": name
                  });
                }

                return name;
              });
              itemEnter.append('div').attr('class', 'community-event-when').html(function (d) {
                var options = {
                  weekday: 'short',
                  day: 'numeric',
                  month: 'short',
                  year: 'numeric'
                };

                if (d.date.getHours() || d.date.getMinutes()) {
                  // include time if it has one
                  options.hour = 'numeric';
                  options.minute = 'numeric';
                }

                return d.date.toLocaleString(_mainLocalizer.localeCode(), options);
              });
              itemEnter.append('div').attr('class', 'community-event-where').html(function (d) {
                var where = d.where;

                if (d.i18n && d.id) {
                  where = _t("community.".concat(communityID, ".events.").concat(d.id, ".where"), {
                    "default": where
                  });
                }

                return where;
              });
              itemEnter.append('div').attr('class', 'community-event-description').html(function (d) {
                var description = d.description;

                if (d.i18n && d.id) {
                  description = _t("community.".concat(communityID, ".events.").concat(d.id, ".description"), {
                    "default": description
                  });
                }

                return description;
              });
            }
          }

          success.changeset = function (val) {
            if (!arguments.length) return _changeset;
            _changeset = val;
            return success;
          };

          success.location = function (val) {
            if (!arguments.length) return _location;
            _location = val;
            return success;
          };

          return utilRebind(success, dispatch, 'on');
        }

        function modeSave(context) {
          var mode = {
            id: 'save'
          };
          var keybinding = utilKeybinding('modeSave');
          var commit = uiCommit(context).on('cancel', cancel);

          var _conflictsUi; // uiConflicts


          var _location;

          var _success;

          var uploader = context.uploader().on('saveStarted.modeSave', function () {
            keybindingOff();
          }) // fire off some async work that we want to be ready later
          .on('willAttemptUpload.modeSave', prepareForSuccess).on('progressChanged.modeSave', showProgress).on('resultNoChanges.modeSave', function () {
            cancel();
          }).on('resultErrors.modeSave', showErrors).on('resultConflicts.modeSave', showConflicts).on('resultSuccess.modeSave', showSuccess);

          function cancel() {
            context.enter(modeBrowse(context));
          }

          function showProgress(num, total) {
            var modal = context.container().select('.loading-modal .modal-section');
            var progress = modal.selectAll('.progress').data([0]); // enter/update

            progress.enter().append('div').attr('class', 'progress').merge(progress).text(_t('save.conflict_progress', {
              num: num,
              total: total
            }));
          }

          function showConflicts(changeset, conflicts, origChanges) {
            var selection = context.container().select('.sidebar').append('div').attr('class', 'sidebar-component');
            context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
            _conflictsUi = uiConflicts(context).conflictList(conflicts).origChanges(origChanges).on('cancel', function () {
              context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
              selection.remove();
              keybindingOn();
              uploader.cancelConflictResolution();
            }).on('save', function () {
              context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
              selection.remove();
              uploader.processResolvedConflicts(changeset);
            });
            selection.call(_conflictsUi);
          }

          function showErrors(errors) {
            keybindingOn();
            var selection = uiConfirm(context.container());
            selection.select('.modal-section.header').append('h3').text(_t('save.error'));
            addErrors(selection, errors);
            selection.okButton();
          }

          function addErrors(selection, data) {
            var message = selection.select('.modal-section.message-text');
            var items = message.selectAll('.error-container').data(data);
            var enter = items.enter().append('div').attr('class', 'error-container');
            enter.append('a').attr('class', 'error-description').attr('href', '#').classed('hide-toggle', true).text(function (d) {
              return d.msg || _t('save.unknown_error_details');
            }).on('click', function (d3_event) {
              d3_event.preventDefault();
              var error = select(this);
              var detail = select(this.nextElementSibling);
              var exp = error.classed('expanded');
              detail.style('display', exp ? 'none' : 'block');
              error.classed('expanded', !exp);
            });
            var details = enter.append('div').attr('class', 'error-detail-container').style('display', 'none');
            details.append('ul').attr('class', 'error-detail-list').selectAll('li').data(function (d) {
              return d.details || [];
            }).enter().append('li').attr('class', 'error-detail-item').text(function (d) {
              return d;
            });
            items.exit().remove();
          }

          function showSuccess(changeset) {
            commit.reset();

            var ui = _success.changeset(changeset).location(_location).on('cancel', function () {
              context.ui().sidebar.hide();
            });

            context.enter(modeBrowse(context).sidebar(ui));
          }

          function keybindingOn() {
            select(document).call(keybinding.on('⎋', cancel, true));
          }

          function keybindingOff() {
            select(document).call(keybinding.unbind);
          } // Reverse geocode current map location so we can display a message on
          // the success screen like "Thank you for editing around place, region."


          function prepareForSuccess() {
            _success = uiSuccess(context);
            _location = null;
            if (!services.geocoder) return;
            services.geocoder.reverse(context.map().center(), function (err, result) {
              if (err || !result || !result.address) return;
              var addr = result.address;
              var place = addr && (addr.town || addr.city || addr.county) || '';
              var region = addr && (addr.state || addr.country) || '';
              var separator = place && region ? _t('success.thank_you_where.separator') : '';
              _location = _t('success.thank_you_where.format', {
                place: place,
                separator: separator,
                region: region
              });
            });
          }

          mode.selectedIDs = function () {
            return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
          };

          mode.enter = function () {
            // Show sidebar
            context.ui().sidebar.expand();

            function done() {
              context.ui().sidebar.show(commit);
            }

            keybindingOn();
            context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
            var osm = context.connection();

            if (!osm) {
              cancel();
              return;
            }

            if (osm.authenticated()) {
              done();
            } else {
              osm.authenticate(function (err) {
                if (err) {
                  cancel();
                } else {
                  done();
                }
              });
            }
          };

          mode.exit = function () {
            keybindingOff();
            context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
            context.ui().sidebar.hide();
          };

          return mode;
        }

        function modeSelectError(context, selectedErrorID, selectedErrorService) {
          var mode = {
            id: 'select-error',
            button: 'browse'
          };
          var keybinding = utilKeybinding('select-error');
          var errorService = services[selectedErrorService];
          var errorEditor;

          switch (selectedErrorService) {
            case 'improveOSM':
              errorEditor = uiImproveOsmEditor(context).on('change', function () {
                context.map().pan([0, 0]); // trigger a redraw

                var error = checkSelectedID();
                if (!error) return;
                context.ui().sidebar.show(errorEditor.error(error));
              });
              break;

            case 'keepRight':
              errorEditor = uiKeepRightEditor(context).on('change', function () {
                context.map().pan([0, 0]); // trigger a redraw

                var error = checkSelectedID();
                if (!error) return;
                context.ui().sidebar.show(errorEditor.error(error));
              });
              break;

            case 'osmose':
              errorEditor = uiOsmoseEditor(context).on('change', function () {
                context.map().pan([0, 0]); // trigger a redraw

                var error = checkSelectedID();
                if (!error) return;
                context.ui().sidebar.show(errorEditor.error(error));
              });
              break;
          }

          var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];

          function checkSelectedID() {
            if (!errorService) return;
            var error = errorService.getError(selectedErrorID);

            if (!error) {
              context.enter(modeBrowse(context));
            }

            return error;
          }

          mode.zoomToSelected = function () {
            if (!errorService) return;
            var error = errorService.getError(selectedErrorID);

            if (error) {
              context.map().centerZoomEase(error.loc, 20);
            }
          };

          mode.enter = function () {
            var error = checkSelectedID();
            if (!error) return;
            behaviors.forEach(context.install);
            keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
            select(document).call(keybinding);
            selectError();
            var sidebar = context.ui().sidebar;
            sidebar.show(errorEditor.error(error));
            context.map().on('drawn.select-error', selectError); // class the error as selected, or return to browse mode if the error is gone

            function selectError(d3_event, drawn) {
              if (!checkSelectedID()) return;
              var selection = context.surface().selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);

              if (selection.empty()) {
                // Return to browse mode if selected DOM elements have
                // disappeared because the user moved them out of view..
                var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;

                if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
                  context.enter(modeBrowse(context));
                }
              } else {
                selection.classed('selected', true);
                context.selectedErrorID(selectedErrorID);
              }
            }

            function esc() {
              if (context.container().select('.combobox').size()) return;
              context.enter(modeBrowse(context));
            }
          };

          mode.exit = function () {
            behaviors.forEach(context.uninstall);
            select(document).call(keybinding.unbind);
            context.surface().selectAll('.qaItem.selected').classed('selected hover', false);
            context.map().on('drawn.select-error', null);
            context.ui().sidebar.hide();
            context.selectedErrorID(null);
            context.features().forceVisible([]);
          };

          return mode;
        }

        function uiToolOldDrawModes(context) {
          var tool = {
            id: 'old_modes',
            label: _t.html('toolbar.add_feature')
          };
          var modes = [modeAddPoint(context, {
            title: _t.html('modes.add_point.title'),
            button: 'point',
            description: _t.html('modes.add_point.description'),
            preset: _mainPresetIndex.item('point'),
            key: '1'
          }), modeAddLine(context, {
            title: _t.html('modes.add_line.title'),
            button: 'line',
            description: _t.html('modes.add_line.description'),
            preset: _mainPresetIndex.item('line'),
            key: '2'
          }), modeAddArea(context, {
            title: _t.html('modes.add_area.title'),
            button: 'area',
            description: _t.html('modes.add_area.description'),
            preset: _mainPresetIndex.item('area'),
            key: '3'
          })];

          function enabled() {
            return osmEditable();
          }

          function osmEditable() {
            return context.editable();
          }

          modes.forEach(function (mode) {
            context.keybinding().on(mode.key, function () {
              if (!enabled()) return;

              if (mode.id === context.mode().id) {
                context.enter(modeBrowse(context));
              } else {
                context.enter(mode);
              }
            });
          });

          tool.render = function (selection) {
            var wrap = selection.append('div').attr('class', 'joined').style('display', 'flex');

            var debouncedUpdate = debounce(update, 500, {
              leading: true,
              trailing: true
            });

            context.map().on('move.modes', debouncedUpdate).on('drawn.modes', debouncedUpdate);
            context.on('enter.modes', update);
            update();

            function update() {
              var buttons = wrap.selectAll('button.add-button').data(modes, function (d) {
                return d.id;
              }); // exit

              buttons.exit().remove(); // enter

              var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
                return d.id + ' add-button bar-button';
              }).on('click.mode-buttons', function (d3_event, d) {
                if (!enabled()) return; // When drawing, ignore accidental clicks on mode buttons - #4042

                var currMode = context.mode().id;
                if (/^draw/.test(currMode)) return;

                if (d.id === currMode) {
                  context.enter(modeBrowse(context));
                } else {
                  context.enter(d);
                }
              }).call(uiTooltip().placement('bottom').title(function (d) {
                return d.description;
              }).keys(function (d) {
                return [d.key];
              }).scrollContainer(context.container().select('.top-toolbar')));
              buttonsEnter.each(function (d) {
                select(this).call(svgIcon('#iD-icon-' + d.button));
              });
              buttonsEnter.append('span').attr('class', 'label').html(function (mode) {
                return mode.title;
              }); // if we are adding/removing the buttons, check if toolbar has overflowed

              if (buttons.enter().size() || buttons.exit().size()) {
                context.ui().checkOverflow('.top-toolbar', true);
              } // update


              buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
                return !enabled();
              }).classed('active', function (d) {
                return context.mode() && context.mode().button === d.button;
              });
            }
          };

          return tool;
        }

        function uiToolNotes(context) {
          var tool = {
            id: 'notes',
            label: _t.html('modes.add_note.label')
          };
          var mode = modeAddNote(context);

          function enabled() {
            return notesEnabled() && notesEditable();
          }

          function notesEnabled() {
            var noteLayer = context.layers().layer('notes');
            return noteLayer && noteLayer.enabled();
          }

          function notesEditable() {
            var mode = context.mode();
            return context.map().notesEditable() && mode && mode.id !== 'save';
          }

          context.keybinding().on(mode.key, function () {
            if (!enabled()) return;

            if (mode.id === context.mode().id) {
              context.enter(modeBrowse(context));
            } else {
              context.enter(mode);
            }
          });

          tool.render = function (selection) {
            var debouncedUpdate = debounce(update, 500, {
              leading: true,
              trailing: true
            });

            context.map().on('move.notes', debouncedUpdate).on('drawn.notes', debouncedUpdate);
            context.on('enter.notes', update);
            update();

            function update() {
              var showNotes = notesEnabled();
              var data = showNotes ? [mode] : [];
              var buttons = selection.selectAll('button.add-button').data(data, function (d) {
                return d.id;
              }); // exit

              buttons.exit().remove(); // enter

              var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
                return d.id + ' add-button bar-button';
              }).on('click.notes', function (d3_event, d) {
                if (!enabled()) return; // When drawing, ignore accidental clicks on mode buttons - #4042

                var currMode = context.mode().id;
                if (/^draw/.test(currMode)) return;

                if (d.id === currMode) {
                  context.enter(modeBrowse(context));
                } else {
                  context.enter(d);
                }
              }).call(uiTooltip().placement('bottom').title(function (d) {
                return d.description;
              }).keys(function (d) {
                return [d.key];
              }).scrollContainer(context.container().select('.top-toolbar')));
              buttonsEnter.each(function (d) {
                select(this).call(svgIcon(d.icon || '#iD-icon-' + d.button));
              }); // if we are adding/removing the buttons, check if toolbar has overflowed

              if (buttons.enter().size() || buttons.exit().size()) {
                context.ui().checkOverflow('.top-toolbar', true);
              } // update


              buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
                return !enabled();
              }).classed('active', function (d) {
                return context.mode() && context.mode().button === d.button;
              });
            }
          };

          tool.uninstall = function () {
            context.on('enter.editor.notes', null).on('exit.editor.notes', null).on('enter.notes', null);
            context.map().on('move.notes', null).on('drawn.notes', null);
          };

          return tool;
        }

        function uiToolSave(context) {
          var tool = {
            id: 'save',
            label: _t.html('save.title')
          };
          var button = null;
          var tooltipBehavior = null;
          var history = context.history();
          var key = uiCmd('⌘S');
          var _numChanges = 0;

          function isSaving() {
            var mode = context.mode();
            return mode && mode.id === 'save';
          }

          function isDisabled() {
            return _numChanges === 0 || isSaving();
          }

          function save(d3_event) {
            d3_event.preventDefault();

            if (!context.inIntro() && !isSaving() && history.hasChanges()) {
              context.enter(modeSave(context));
            }
          }

          function bgColor() {
            var step;

            if (_numChanges === 0) {
              return null;
            } else if (_numChanges <= 50) {
              step = _numChanges / 50;
              return d3_interpolateRgb('#fff', '#ff8')(step); // white -> yellow
            } else {
              step = Math.min((_numChanges - 50) / 50, 1.0);
              return d3_interpolateRgb('#ff8', '#f88')(step); // yellow -> red
            }
          }

          function updateCount() {
            var val = history.difference().summary().length;
            if (val === _numChanges) return;
            _numChanges = val;

            if (tooltipBehavior) {
              tooltipBehavior.title(_t.html(_numChanges > 0 ? 'save.help' : 'save.no_changes')).keys([key]);
            }

            if (button) {
              button.classed('disabled', isDisabled()).style('background', bgColor());
              button.select('span.count').html(_numChanges);
            }
          }

          tool.render = function (selection) {
            tooltipBehavior = uiTooltip().placement('bottom').title(_t.html('save.no_changes')).keys([key]).scrollContainer(context.container().select('.top-toolbar'));
            var lastPointerUpType;
            button = selection.append('button').attr('class', 'save disabled bar-button').on('pointerup', function (d3_event) {
              lastPointerUpType = d3_event.pointerType;
            }).on('click', function (d3_event) {
              save(d3_event);

              if (_numChanges === 0 && (lastPointerUpType === 'touch' || lastPointerUpType === 'pen')) {
                // there are no tooltips for touch interactions so flash feedback instead
                context.ui().flash.duration(2000).iconName('#iD-icon-save').iconClass('disabled').label(_t.html('save.no_changes'))();
              }

              lastPointerUpType = null;
            }).call(tooltipBehavior);
            button.call(svgIcon('#iD-icon-save'));
            button.append('span').attr('class', 'count').attr('aria-hidden', 'true').html('0');
            updateCount();
            context.keybinding().on(key, save, true);
            context.history().on('change.save', updateCount);
            context.on('enter.save', function () {
              if (button) {
                button.classed('disabled', isDisabled());

                if (isSaving()) {
                  button.call(tooltipBehavior.hide);
                }
              }
            });
          };

          tool.uninstall = function () {
            context.keybinding().off(key, true);
            context.history().on('change.save', null);
            context.on('enter.save', null);
            button = null;
            tooltipBehavior = null;
          };

          return tool;
        }

        function uiToolSidebarToggle(context) {
          var tool = {
            id: 'sidebar_toggle',
            label: _t.html('toolbar.inspect')
          };

          tool.render = function (selection) {
            selection.append('button').attr('class', 'bar-button').on('click', function () {
              context.ui().sidebar.toggle();
            }).call(uiTooltip().placement('bottom').title(_t.html('sidebar.tooltip')).keys([_t('sidebar.key')]).scrollContainer(context.container().select('.top-toolbar'))).call(svgIcon('#iD-icon-sidebar-' + (_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')));
          };

          return tool;
        }

        function uiToolUndoRedo(context) {
          var tool = {
            id: 'undo_redo',
            label: _t.html('toolbar.undo_redo')
          };
          var commands = [{
            id: 'undo',
            cmd: uiCmd('⌘Z'),
            action: function action() {
              context.undo();
            },
            annotation: function annotation() {
              return context.history().undoAnnotation();
            },
            icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')
          }, {
            id: 'redo',
            cmd: uiCmd('⌘⇧Z'),
            action: function action() {
              context.redo();
            },
            annotation: function annotation() {
              return context.history().redoAnnotation();
            },
            icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'undo' : 'redo')
          }];

          function editable() {
            return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true
            /* ignore min zoom */
            );
          }

          tool.render = function (selection) {
            var tooltipBehavior = uiTooltip().placement('bottom').title(function (d) {
              return d.annotation() ? _t.html(d.id + '.tooltip', {
                action: d.annotation()
              }) : _t.html(d.id + '.nothing');
            }).keys(function (d) {
              return [d.cmd];
            }).scrollContainer(context.container().select('.top-toolbar'));
            var lastPointerUpType;
            var buttons = selection.selectAll('button').data(commands).enter().append('button').attr('class', function (d) {
              return 'disabled ' + d.id + '-button bar-button';
            }).on('pointerup', function (d3_event) {
              // `pointerup` is always called before `click`
              lastPointerUpType = d3_event.pointerType;
            }).on('click', function (d3_event, d) {
              d3_event.preventDefault();
              var annotation = d.annotation();

              if (editable() && annotation) {
                d.action();
              }

              if (editable() && (lastPointerUpType === 'touch' || lastPointerUpType === 'pen')) {
                // there are no tooltips for touch interactions so flash feedback instead
                var text = annotation ? _t(d.id + '.tooltip', {
                  action: annotation
                }) : _t(d.id + '.nothing');
                context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass(annotation ? '' : 'disabled').label(text)();
              }

              lastPointerUpType = null;
            }).call(tooltipBehavior);
            buttons.each(function (d) {
              select(this).call(svgIcon('#' + d.icon));
            });
            context.keybinding().on(commands[0].cmd, function (d3_event) {
              d3_event.preventDefault();
              if (editable()) commands[0].action();
            }).on(commands[1].cmd, function (d3_event) {
              d3_event.preventDefault();
              if (editable()) commands[1].action();
            });

            var debouncedUpdate = debounce(update, 500, {
              leading: true,
              trailing: true
            });

            context.map().on('move.undo_redo', debouncedUpdate).on('drawn.undo_redo', debouncedUpdate);
            context.history().on('change.undo_redo', function (difference) {
              if (difference) update();
            });
            context.on('enter.undo_redo', update);

            function update() {
              buttons.classed('disabled', function (d) {
                return !editable() || !d.annotation();
              }).each(function () {
                var selection = select(this);

                if (!selection.select('.tooltip.in').empty()) {
                  selection.call(tooltipBehavior.updateContent);
                }
              });
            }
          };

          tool.uninstall = function () {
            context.keybinding().off(commands[0].cmd).off(commands[1].cmd);
            context.map().on('move.undo_redo', null).on('drawn.undo_redo', null);
            context.history().on('change.undo_redo', null);
            context.on('enter.undo_redo', null);
          };

          return tool;
        }

        function uiTopToolbar(context) {
          var sidebarToggle = uiToolSidebarToggle(context),
              modes = uiToolOldDrawModes(context),
              notes = uiToolNotes(context),
              undoRedo = uiToolUndoRedo(context),
              save = uiToolSave(context);

          function notesEnabled() {
            var noteLayer = context.layers().layer('notes');
            return noteLayer && noteLayer.enabled();
          }

          function topToolbar(bar) {
            bar.on('wheel.topToolbar', function (d3_event) {
              if (!d3_event.deltaX) {
                // translate vertical scrolling into horizontal scrolling in case
                // the user doesn't have an input device that can scroll horizontally
                bar.node().scrollLeft += d3_event.deltaY;
              }
            });

            var debouncedUpdate = debounce(update, 500, {
              leading: true,
              trailing: true
            });

            context.layers().on('change.topToolbar', debouncedUpdate);
            update();

            function update() {
              var tools = [sidebarToggle, 'spacer', modes];
              tools.push('spacer');

              if (notesEnabled()) {
                tools = tools.concat([notes, 'spacer']);
              }

              tools = tools.concat([undoRedo, save]);
              var toolbarItems = bar.selectAll('.toolbar-item').data(tools, function (d) {
                return d.id || d;
              });
              toolbarItems.exit().each(function (d) {
                if (d.uninstall) {
                  d.uninstall();
                }
              }).remove();
              var itemsEnter = toolbarItems.enter().append('div').attr('class', function (d) {
                var classes = 'toolbar-item ' + (d.id || d).replace('_', '-');
                if (d.klass) classes += ' ' + d.klass;
                return classes;
              });
              var actionableItems = itemsEnter.filter(function (d) {
                return d !== 'spacer';
              });
              actionableItems.append('div').attr('class', 'item-content').each(function (d) {
                select(this).call(d.render, bar);
              });
              actionableItems.append('div').attr('class', 'item-label').html(function (d) {
                return d.label;
              });
            }
          }

          return topToolbar;
        }

        var sawVersion = null;
        var isNewVersion = false;
        var isNewUser = false;
        function uiVersion(context) {
          var currVersion = context.version;
          var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);

          if (sawVersion === null && matchedVersion !== null) {
            if (corePreferences('sawVersion')) {
              isNewUser = false;
              isNewVersion = corePreferences('sawVersion') !== currVersion && currVersion.indexOf('-') === -1;
            } else {
              isNewUser = true;
              isNewVersion = true;
            }

            corePreferences('sawVersion', currVersion);
            sawVersion = currVersion;
          }

          return function (selection) {
            selection.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD').html(currVersion); // only show new version indicator to users that have used iD before

            if (isNewVersion && !isNewUser) {
              selection.append('a').attr('class', 'badge').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/blob/release/CHANGELOG.md#whats-new').call(svgIcon('#maki-gift-11')).call(uiTooltip().title(_t.html('version.whats_new', {
                version: currVersion
              })).placement('top').scrollContainer(context.container().select('.main-footer-wrap')));
            }
          };
        }

        function uiZoom(context) {
          var zooms = [{
            id: 'zoom-in',
            icon: 'iD-icon-plus',
            title: _t.html('zoom.in'),
            action: zoomIn,
            disabled: function disabled() {
              return !context.map().canZoomIn();
            },
            disabledTitle: _t.html('zoom.disabled.in'),
            key: '+'
          }, {
            id: 'zoom-out',
            icon: 'iD-icon-minus',
            title: _t.html('zoom.out'),
            action: zoomOut,
            disabled: function disabled() {
              return !context.map().canZoomOut();
            },
            disabledTitle: _t.html('zoom.disabled.out'),
            key: '-'
          }];

          function zoomIn(d3_event) {
            if (d3_event.shiftKey) return;
            d3_event.preventDefault();
            context.map().zoomIn();
          }

          function zoomOut(d3_event) {
            if (d3_event.shiftKey) return;
            d3_event.preventDefault();
            context.map().zoomOut();
          }

          function zoomInFurther(d3_event) {
            if (d3_event.shiftKey) return;
            d3_event.preventDefault();
            context.map().zoomInFurther();
          }

          function zoomOutFurther(d3_event) {
            if (d3_event.shiftKey) return;
            d3_event.preventDefault();
            context.map().zoomOutFurther();
          }

          return function (selection) {
            var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function (d) {
              if (d.disabled()) {
                return d.disabledTitle;
              }

              return d.title;
            }).keys(function (d) {
              return [d.key];
            });
            var lastPointerUpType;
            var buttons = selection.selectAll('button').data(zooms).enter().append('button').attr('class', function (d) {
              return d.id;
            }).on('pointerup.editor', function (d3_event) {
              lastPointerUpType = d3_event.pointerType;
            }).on('click.editor', function (d3_event, d) {
              if (!d.disabled()) {
                d.action(d3_event);
              } else if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
                context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass('disabled').label(d.disabledTitle)();
              }

              lastPointerUpType = null;
            }).call(tooltipBehavior);
            buttons.each(function (d) {
              select(this).call(svgIcon('#' + d.icon, 'light'));
            });
            utilKeybinding.plusKeys.forEach(function (key) {
              context.keybinding().on([key], zoomIn);
              context.keybinding().on([uiCmd('⌥' + key)], zoomInFurther);
            });
            utilKeybinding.minusKeys.forEach(function (key) {
              context.keybinding().on([key], zoomOut);
              context.keybinding().on([uiCmd('⌥' + key)], zoomOutFurther);
            });

            function updateButtonStates() {
              buttons.classed('disabled', function (d) {
                return d.disabled();
              }).each(function () {
                var selection = select(this);

                if (!selection.select('.tooltip.in').empty()) {
                  selection.call(tooltipBehavior.updateContent);
                }
              });
            }

            updateButtonStates();
            context.map().on('move.uiZoom', updateButtonStates);
          };
        }

        function uiZoomToSelection(context) {
          function isDisabled() {
            var mode = context.mode();
            return !mode || !mode.zoomToSelected;
          }

          var _lastPointerUpType;

          function pointerup(d3_event) {
            _lastPointerUpType = d3_event.pointerType;
          }

          function click(d3_event) {
            d3_event.preventDefault();

            if (isDisabled()) {
              if (_lastPointerUpType === 'touch' || _lastPointerUpType === 'pen') {
                context.ui().flash.duration(2000).iconName('#iD-icon-framed-dot').iconClass('disabled').label(_t.html('inspector.zoom_to.no_selection'))();
              }
            } else {
              var mode = context.mode();

              if (mode && mode.zoomToSelected) {
                mode.zoomToSelected();
              }
            }

            _lastPointerUpType = null;
          }

          return function (selection) {
            var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function () {
              if (isDisabled()) {
                return _t.html('inspector.zoom_to.no_selection');
              }

              return _t.html('inspector.zoom_to.title');
            }).keys([_t('inspector.zoom_to.key')]);
            var button = selection.append('button').on('pointerup', pointerup).on('click', click).call(svgIcon('#iD-icon-framed-dot', 'light')).call(tooltipBehavior);

            function setEnabledState() {
              button.classed('disabled', isDisabled());

              if (!button.select('.tooltip.in').empty()) {
                button.call(tooltipBehavior.updateContent);
              }
            }

            context.on('enter.uiZoomToSelection', setEnabledState);
            setEnabledState();
          };
        }

        function uiPane(id, context) {
          var _key;

          var _label = '';
          var _description = '';
          var _iconName = '';

          var _sections; // array of uiSection objects


          var _paneSelection = select(null);

          var _paneTooltip;

          var pane = {
            id: id
          };

          pane.label = function (val) {
            if (!arguments.length) return _label;
            _label = val;
            return pane;
          };

          pane.key = function (val) {
            if (!arguments.length) return _key;
            _key = val;
            return pane;
          };

          pane.description = function (val) {
            if (!arguments.length) return _description;
            _description = val;
            return pane;
          };

          pane.iconName = function (val) {
            if (!arguments.length) return _iconName;
            _iconName = val;
            return pane;
          };

          pane.sections = function (val) {
            if (!arguments.length) return _sections;
            _sections = val;
            return pane;
          };

          pane.selection = function () {
            return _paneSelection;
          };

          function hidePane() {
            context.ui().togglePanes();
          }

          pane.togglePane = function (d3_event) {
            if (d3_event) d3_event.preventDefault();

            _paneTooltip.hide();

            context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
          };

          pane.renderToggleButton = function (selection) {
            if (!_paneTooltip) {
              _paneTooltip = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_description).keys([_key]);
            }

            selection.append('button').on('click', pane.togglePane).call(svgIcon('#' + _iconName, 'light')).call(_paneTooltip);
          };

          pane.renderContent = function (selection) {
            // override to fully customize content
            if (_sections) {
              _sections.forEach(function (section) {
                selection.call(section.render);
              });
            }
          };

          pane.renderPane = function (selection) {
            _paneSelection = selection.append('div').attr('class', 'fillL map-pane hide ' + id + '-pane').attr('pane', id);

            var heading = _paneSelection.append('div').attr('class', 'pane-heading');

            heading.append('h2').html(_label);
            heading.append('button').on('click', hidePane).call(svgIcon('#iD-icon-close'));

            _paneSelection.append('div').attr('class', 'pane-content').call(pane.renderContent);

            if (_key) {
              context.keybinding().on(_key, pane.togglePane);
            }
          };

          return pane;
        }

        function uiSectionBackgroundDisplayOptions(context) {
          var section = uiSection('background-display-options', context).label(_t.html('background.display_options')).disclosureContent(renderDisclosureContent);

          var _detected = utilDetect();

          var _storedOpacity = corePreferences('background-opacity');

          var _minVal = 0;

          var _maxVal = _detected.cssfilters ? 3 : 1;

          var _sliders = _detected.cssfilters ? ['brightness', 'contrast', 'saturation', 'sharpness'] : ['brightness'];

          var _options = {
            brightness: _storedOpacity !== null ? +_storedOpacity : 1,
            contrast: 1,
            saturation: 1,
            sharpness: 1
          };

          function clamp(x, min, max) {
            return Math.max(min, Math.min(x, max));
          }

          function updateValue(d, val) {
            val = clamp(val, _minVal, _maxVal);
            _options[d] = val;
            context.background()[d](val);

            if (d === 'brightness') {
              corePreferences('background-opacity', val);
            }

            section.reRender();
          }

          function renderDisclosureContent(selection) {
            var container = selection.selectAll('.display-options-container').data([0]);
            var containerEnter = container.enter().append('div').attr('class', 'display-options-container controls-list'); // add slider controls

            var slidersEnter = containerEnter.selectAll('.display-control').data(_sliders).enter().append('div').attr('class', function (d) {
              return 'display-control display-control-' + d;
            });
            slidersEnter.append('h5').html(function (d) {
              return _t.html('background.' + d);
            }).append('span').attr('class', function (d) {
              return 'display-option-value display-option-value-' + d;
            });
            var sildersControlEnter = slidersEnter.append('div').attr('class', 'control-wrap');
            sildersControlEnter.append('input').attr('class', function (d) {
              return 'display-option-input display-option-input-' + d;
            }).attr('type', 'range').attr('min', _minVal).attr('max', _maxVal).attr('step', '0.05').on('input', function (d3_event, d) {
              var val = select(this).property('value');

              if (!val && d3_event && d3_event.target) {
                val = d3_event.target.value;
              }

              updateValue(d, val);
            });
            sildersControlEnter.append('button').attr('title', _t('background.reset')).attr('class', function (d) {
              return 'display-option-reset display-option-reset-' + d;
            }).on('click', function (d3_event, d) {
              if (d3_event.button !== 0) return;
              updateValue(d, 1);
            }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo'))); // reset all button

            containerEnter.append('a').attr('class', 'display-option-resetlink').attr('href', '#').html(_t.html('background.reset_all')).on('click', function (d3_event) {
              d3_event.preventDefault();

              for (var i = 0; i < _sliders.length; i++) {
                updateValue(_sliders[i], 1);
              }
            }); // update

            container = containerEnter.merge(container);
            container.selectAll('.display-option-input').property('value', function (d) {
              return _options[d];
            });
            container.selectAll('.display-option-value').html(function (d) {
              return Math.floor(_options[d] * 100) + '%';
            });
            container.selectAll('.display-option-reset').classed('disabled', function (d) {
              return _options[d] === 1;
            }); // first time only, set brightness if needed

            if (containerEnter.size() && _options.brightness !== 1) {
              context.background().brightness(_options.brightness);
            }
          }

          return section;
        }

        function uiSettingsCustomBackground() {
          var dispatch = dispatch$8('change');

          function render(selection) {
            // keep separate copies of original and current settings
            var _origSettings = {
              template: corePreferences('background-custom-template')
            };
            var _currSettings = {
              template: corePreferences('background-custom-template')
            };
            var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
            var modal = uiConfirm(selection).okButton();
            modal.classed('settings-modal settings-custom-background', true);
            modal.select('.modal-section.header').append('h3').html(_t.html('settings.custom_background.header'));
            var textSection = modal.select('.modal-section.message-text');
            var instructions = "".concat(_t.html('settings.custom_background.instructions.info'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.wms.tokens_label'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.proj'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.wkid'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.dimensions'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.bbox'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.tms.tokens_label'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.xyz'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.flipped_y'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.switch'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.quadtile'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.scale_factor'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.example'), "\n") + "`".concat(example, "`");
            textSection.append('div').attr('class', 'instructions-template').html(marked_1(instructions));
            textSection.append('textarea').attr('class', 'field-template').attr('placeholder', _t('settings.custom_background.template.placeholder')).call(utilNoAuto).property('value', _currSettings.template); // insert a cancel button

            var buttonSection = modal.select('.modal-section.buttons');
            buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
            buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
            buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);

            function isSaveDisabled() {
              return null;
            } // restore the original template


            function clickCancel() {
              textSection.select('.field-template').property('value', _origSettings.template);
              corePreferences('background-custom-template', _origSettings.template);
              this.blur();
              modal.close();
            } // accept the current template


            function clickSave() {
              _currSettings.template = textSection.select('.field-template').property('value');
              corePreferences('background-custom-template', _currSettings.template);
              this.blur();
              modal.close();
              dispatch.call('change', this, _currSettings);
            }
          }

          return utilRebind(render, dispatch, 'on');
        }

        function uiSectionBackgroundList(context) {
          var _backgroundList = select(null);

          var _customSource = context.background().findSource('custom');

          var _settingsCustomBackground = uiSettingsCustomBackground().on('change', customChanged);

          var section = uiSection('background-list', context).label(_t.html('background.backgrounds')).disclosureContent(renderDisclosureContent);

          function previousBackgroundID() {
            return corePreferences('background-last-used-toggle');
          }

          function renderDisclosureContent(selection) {
            // the background list
            var container = selection.selectAll('.layer-background-list').data([0]);
            _backgroundList = container.enter().append('ul').attr('class', 'layer-list layer-background-list').attr('dir', 'auto').merge(container); // add minimap toggle below list

            var bgExtrasListEnter = selection.selectAll('.bg-extras-list').data([0]).enter().append('ul').attr('class', 'layer-list bg-extras-list');
            var minimapLabelEnter = bgExtrasListEnter.append('li').attr('class', 'minimap-toggle-item').append('label').call(uiTooltip().title(_t.html('background.minimap.tooltip')).keys([_t('background.minimap.key')]).placement('top'));
            minimapLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
              d3_event.preventDefault();
              uiMapInMap.toggle();
            });
            minimapLabelEnter.append('span').html(_t.html('background.minimap.description'));
            var panelLabelEnter = bgExtrasListEnter.append('li').attr('class', 'background-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('background.panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.background.key'))]).placement('top'));
            panelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
              d3_event.preventDefault();
              context.ui().info.toggle('background');
            });
            panelLabelEnter.append('span').html(_t.html('background.panel.description'));
            var locPanelLabelEnter = bgExtrasListEnter.append('li').attr('class', 'location-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('background.location_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.location.key'))]).placement('top'));
            locPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
              d3_event.preventDefault();
              context.ui().info.toggle('location');
            });
            locPanelLabelEnter.append('span').html(_t.html('background.location_panel.description')); // "Info / Report a Problem" link

            selection.selectAll('.imagery-faq').data([0]).enter().append('div').attr('class', 'imagery-faq').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/openstreetmap/iD/blob/develop/FAQ.md#how-can-i-report-an-issue-with-background-imagery').append('span').html(_t.html('background.imagery_problem_faq'));

            _backgroundList.call(drawListItems, 'radio', function (d3_event, d) {
              chooseBackground(d);
            }, function (d) {
              return !d.isHidden() && !d.overlay;
            });
          }

          function setTooltips(selection) {
            selection.each(function (d, i, nodes) {
              var item = select(this).select('label');
              var span = item.select('span');
              var placement = i < nodes.length / 2 ? 'bottom' : 'top';
              var description = d.description();
              var isOverflowing = span.property('clientWidth') !== span.property('scrollWidth');
              item.call(uiTooltip().destroyAny);

              if (d.id === previousBackgroundID()) {
                item.call(uiTooltip().placement(placement).title('<div>' + _t.html('background.switch') + '</div>').keys([uiCmd('⌘' + _t('background.key'))]));
              } else if (description || isOverflowing) {
                item.call(uiTooltip().placement(placement).title(description || d.label()));
              }
            });
          }

          function drawListItems(layerList, type, change, filter) {
            var sources = context.background().sources(context.map().extent(), context.map().zoom(), true).filter(filter).sort(function (a, b) {
              return a.best() && !b.best() ? -1 : b.best() && !a.best() ? 1 : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
            });
            var layerLinks = layerList.selectAll('li') // We have to be a bit inefficient about reordering the list since
            // arrow key navigation of radio values likes to work in the order
            // they were added, not the display document order.
            .data(sources, function (d, i) {
              return d.id + '---' + i;
            });
            layerLinks.exit().remove();
            var enter = layerLinks.enter().append('li').classed('layer-custom', function (d) {
              return d.id === 'custom';
            }).classed('best', function (d) {
              return d.best();
            });
            var label = enter.append('label');
            label.append('input').attr('type', type).attr('name', 'background-layer').attr('value', function (d) {
              return d.id;
            }).on('change', change);
            label.append('span').html(function (d) {
              return d.label();
            });
            enter.filter(function (d) {
              return d.id === 'custom';
            }).append('button').attr('class', 'layer-browse').call(uiTooltip().title(_t.html('settings.custom_background.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
              d3_event.preventDefault();
              editCustom();
            }).call(svgIcon('#iD-icon-more'));
            enter.filter(function (d) {
              return d.best();
            }).append('div').attr('class', 'best').call(uiTooltip().title(_t.html('background.best_imagery')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).append('span').html('&#9733;');
            layerList.call(updateLayerSelections);
          }

          function updateLayerSelections(selection) {
            function active(d) {
              return context.background().showsLayer(d);
            }

            selection.selectAll('li').classed('active', active).classed('switch', function (d) {
              return d.id === previousBackgroundID();
            }).call(setTooltips).selectAll('input').property('checked', active);
          }

          function chooseBackground(d) {
            if (d.id === 'custom' && !d.template()) {
              return editCustom();
            }

            var previousBackground = context.background().baseLayerSource();
            corePreferences('background-last-used-toggle', previousBackground.id);
            corePreferences('background-last-used', d.id);
            context.background().baseLayerSource(d);
          }

          function customChanged(d) {
            if (d && d.template) {
              _customSource.template(d.template);

              chooseBackground(_customSource);
            } else {
              _customSource.template('');

              chooseBackground(context.background().findSource('none'));
            }
          }

          function editCustom() {
            context.container().call(_settingsCustomBackground);
          }

          context.background().on('change.background_list', function () {
            _backgroundList.call(updateLayerSelections);
          });
          context.map().on('move.background_list', debounce(function () {
            // layers in-view may have changed due to map move
            window.requestIdleCallback(section.reRender);
          }, 1000));
          return section;
        }

        function uiSectionBackgroundOffset(context) {
          var section = uiSection('background-offset', context).label(_t.html('background.fix_misalignment')).disclosureContent(renderDisclosureContent).expandedByDefault(false);

          var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

          var _directions = [['top', [0, -0.5]], ['left', [-0.5, 0]], ['right', [0.5, 0]], ['bottom', [0, 0.5]]];

          function updateValue() {
            var meters = geoOffsetToMeters(context.background().offset());
            var x = +meters[0].toFixed(2);
            var y = +meters[1].toFixed(2);
            context.container().selectAll('.nudge-inner-rect').select('input').classed('error', false).property('value', x + ', ' + y);
            context.container().selectAll('.nudge-reset').classed('disabled', function () {
              return x === 0 && y === 0;
            });
          }

          function resetOffset() {
            context.background().offset([0, 0]);
            updateValue();
          }

          function nudge(d) {
            context.background().nudge(d, context.map().zoom());
            updateValue();
          }

          function inputOffset() {
            var input = select(this);
            var d = input.node().value;
            if (d === '') return resetOffset();
            d = d.replace(/;/g, ',').split(',').map(function (n) {
              // if n is NaN, it will always get mapped to false.
              return !isNaN(n) && n;
            });

            if (d.length !== 2 || !d[0] || !d[1]) {
              input.classed('error', true);
              return;
            }

            context.background().offset(geoMetersToOffset(d));
            updateValue();
          }

          function dragOffset(d3_event) {
            if (d3_event.button !== 0) return;
            var origin = [d3_event.clientX, d3_event.clientY];
            var pointerId = d3_event.pointerId || 'mouse';
            context.container().append('div').attr('class', 'nudge-surface');
            select(window).on(_pointerPrefix + 'move.drag-bg-offset', pointermove).on(_pointerPrefix + 'up.drag-bg-offset', pointerup);

            if (_pointerPrefix === 'pointer') {
              select(window).on('pointercancel.drag-bg-offset', pointerup);
            }

            function pointermove(d3_event) {
              if (pointerId !== (d3_event.pointerId || 'mouse')) return;
              var latest = [d3_event.clientX, d3_event.clientY];
              var d = [-(origin[0] - latest[0]) / 4, -(origin[1] - latest[1]) / 4];
              origin = latest;
              nudge(d);
            }

            function pointerup(d3_event) {
              if (pointerId !== (d3_event.pointerId || 'mouse')) return;
              if (d3_event.button !== 0) return;
              context.container().selectAll('.nudge-surface').remove();
              select(window).on('.drag-bg-offset', null);
            }
          }

          function renderDisclosureContent(selection) {
            var container = selection.selectAll('.nudge-container').data([0]);
            var containerEnter = container.enter().append('div').attr('class', 'nudge-container');
            containerEnter.append('div').attr('class', 'nudge-instructions').html(_t.html('background.offset'));
            var nudgeWrapEnter = containerEnter.append('div').attr('class', 'nudge-controls-wrap');
            var nudgeEnter = nudgeWrapEnter.append('div').attr('class', 'nudge-outer-rect').on(_pointerPrefix + 'down', dragOffset);
            nudgeEnter.append('div').attr('class', 'nudge-inner-rect').append('input').attr('type', 'text').on('change', inputOffset);
            nudgeWrapEnter.append('div').selectAll('button').data(_directions).enter().append('button').attr('class', function (d) {
              return d[0] + ' nudge';
            }).on('click', function (d3_event, d) {
              nudge(d[1]);
            });
            nudgeWrapEnter.append('button').attr('title', _t('background.reset')).attr('class', 'nudge-reset disabled').on('click', function (d3_event) {
              d3_event.preventDefault();
              resetOffset();
            }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
            updateValue();
          }

          context.background().on('change.backgroundOffset-update', updateValue);
          return section;
        }

        function uiSectionOverlayList(context) {
          var section = uiSection('overlay-list', context).label(_t.html('background.overlays')).disclosureContent(renderDisclosureContent);

          var _overlayList = select(null);

          function setTooltips(selection) {
            selection.each(function (d, i, nodes) {
              var item = select(this).select('label');
              var span = item.select('span');
              var placement = i < nodes.length / 2 ? 'bottom' : 'top';
              var description = d.description();
              var isOverflowing = span.property('clientWidth') !== span.property('scrollWidth');
              item.call(uiTooltip().destroyAny);

              if (description || isOverflowing) {
                item.call(uiTooltip().placement(placement).title(description || d.name()));
              }
            });
          }

          function updateLayerSelections(selection) {
            function active(d) {
              return context.background().showsLayer(d);
            }

            selection.selectAll('li').classed('active', active).call(setTooltips).selectAll('input').property('checked', active);
          }

          function chooseOverlay(d3_event, d) {
            d3_event.preventDefault();
            context.background().toggleOverlayLayer(d);

            _overlayList.call(updateLayerSelections);

            document.activeElement.blur();
          }

          function drawListItems(layerList, type, change, filter) {
            var sources = context.background().sources(context.map().extent(), context.map().zoom(), true).filter(filter);
            var layerLinks = layerList.selectAll('li').data(sources, function (d) {
              return d.name();
            });
            layerLinks.exit().remove();
            var enter = layerLinks.enter().append('li');
            var label = enter.append('label');
            label.append('input').attr('type', type).attr('name', 'layers').on('change', change);
            label.append('span').html(function (d) {
              return d.label();
            });
            layerList.selectAll('li').sort(sortSources);
            layerList.call(updateLayerSelections);

            function sortSources(a, b) {
              return a.best() && !b.best() ? -1 : b.best() && !a.best() ? 1 : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
            }
          }

          function renderDisclosureContent(selection) {
            var container = selection.selectAll('.layer-overlay-list').data([0]);
            _overlayList = container.enter().append('ul').attr('class', 'layer-list layer-overlay-list').attr('dir', 'auto').merge(container);

            _overlayList.call(drawListItems, 'checkbox', chooseOverlay, function (d) {
              return !d.isHidden() && d.overlay;
            });
          }

          context.map().on('move.overlay_list', debounce(function () {
            // layers in-view may have changed due to map move
            window.requestIdleCallback(section.reRender);
          }, 1000));
          return section;
        }

        function uiPaneBackground(context) {
          var backgroundPane = uiPane('background', context).key(_t('background.key')).label(_t.html('background.title')).description(_t.html('background.description')).iconName('iD-icon-layers').sections([uiSectionBackgroundList(context), uiSectionOverlayList(context), uiSectionBackgroundDisplayOptions(context), uiSectionBackgroundOffset(context)]);
          return backgroundPane;
        }

        function uiPaneHelp(context) {
          var docKeys = [['help', ['welcome', 'open_data_h', 'open_data', 'before_start_h', 'before_start', 'open_source_h', 'open_source', 'open_source_help']], ['overview', ['navigation_h', 'navigation_drag', 'navigation_zoom', 'features_h', 'features', 'nodes_ways']], ['editing', ['select_h', 'select_left_click', 'select_right_click', 'select_space', 'multiselect_h', 'multiselect', 'multiselect_shift_click', 'multiselect_lasso', 'undo_redo_h', 'undo_redo', 'save_h', 'save', 'save_validation', 'upload_h', 'upload', 'backups_h', 'backups', 'keyboard_h', 'keyboard']], ['feature_editor', ['intro', 'definitions', 'type_h', 'type', 'type_picker', 'fields_h', 'fields_all_fields', 'fields_example', 'fields_add_field', 'tags_h', 'tags_all_tags', 'tags_resources']], ['points', ['intro', 'add_point_h', 'add_point', 'add_point_finish', 'move_point_h', 'move_point', 'delete_point_h', 'delete_point', 'delete_point_command']], ['lines', ['intro', 'add_line_h', 'add_line', 'add_line_draw', 'add_line_continue', 'add_line_finish', 'modify_line_h', 'modify_line_dragnode', 'modify_line_addnode', 'connect_line_h', 'connect_line', 'connect_line_display', 'connect_line_drag', 'connect_line_tag', 'disconnect_line_h', 'disconnect_line_command', 'move_line_h', 'move_line_command', 'move_line_connected', 'delete_line_h', 'delete_line', 'delete_line_command']], ['areas', ['intro', 'point_or_area_h', 'point_or_area', 'add_area_h', 'add_area_command', 'add_area_draw', 'add_area_continue', 'add_area_finish', 'square_area_h', 'square_area_command', 'modify_area_h', 'modify_area_dragnode', 'modify_area_addnode', 'delete_area_h', 'delete_area', 'delete_area_command']], ['relations', ['intro', 'edit_relation_h', 'edit_relation', 'edit_relation_add', 'edit_relation_delete', 'maintain_relation_h', 'maintain_relation', 'relation_types_h', 'multipolygon_h', 'multipolygon', 'multipolygon_create', 'multipolygon_merge', 'turn_restriction_h', 'turn_restriction', 'turn_restriction_field', 'turn_restriction_editing', 'route_h', 'route', 'route_add', 'boundary_h', 'boundary', 'boundary_add']], ['operations', ['intro', 'intro_2', 'straighten', 'orthogonalize', 'circularize', 'move', 'rotate', 'reflect', 'continue', 'reverse', 'disconnect', 'split', 'extract', 'merge', 'delete', 'downgrade', 'copy_paste']], ['notes', ['intro', 'add_note_h', 'add_note', 'place_note', 'move_note', 'update_note_h', 'update_note', 'save_note_h', 'save_note']], ['imagery', ['intro', 'sources_h', 'choosing', 'sources', 'offsets_h', 'offset', 'offset_change']], ['streetlevel', ['intro', 'using_h', 'using', 'photos', 'viewer']], ['gps', ['intro', 'survey', 'using_h', 'using', 'tracing', 'upload']], ['qa', ['intro', 'tools_h', 'tools', 'issues_h', 'issues']]];
          var headings = {
            'help.help.open_data_h': 3,
            'help.help.before_start_h': 3,
            'help.help.open_source_h': 3,
            'help.overview.navigation_h': 3,
            'help.overview.features_h': 3,
            'help.editing.select_h': 3,
            'help.editing.multiselect_h': 3,
            'help.editing.undo_redo_h': 3,
            'help.editing.save_h': 3,
            'help.editing.upload_h': 3,
            'help.editing.backups_h': 3,
            'help.editing.keyboard_h': 3,
            'help.feature_editor.type_h': 3,
            'help.feature_editor.fields_h': 3,
            'help.feature_editor.tags_h': 3,
            'help.points.add_point_h': 3,
            'help.points.move_point_h': 3,
            'help.points.delete_point_h': 3,
            'help.lines.add_line_h': 3,
            'help.lines.modify_line_h': 3,
            'help.lines.connect_line_h': 3,
            'help.lines.disconnect_line_h': 3,
            'help.lines.move_line_h': 3,
            'help.lines.delete_line_h': 3,
            'help.areas.point_or_area_h': 3,
            'help.areas.add_area_h': 3,
            'help.areas.square_area_h': 3,
            'help.areas.modify_area_h': 3,
            'help.areas.delete_area_h': 3,
            'help.relations.edit_relation_h': 3,
            'help.relations.maintain_relation_h': 3,
            'help.relations.relation_types_h': 2,
            'help.relations.multipolygon_h': 3,
            'help.relations.turn_restriction_h': 3,
            'help.relations.route_h': 3,
            'help.relations.boundary_h': 3,
            'help.notes.add_note_h': 3,
            'help.notes.update_note_h': 3,
            'help.notes.save_note_h': 3,
            'help.imagery.sources_h': 3,
            'help.imagery.offsets_h': 3,
            'help.streetlevel.using_h': 3,
            'help.gps.using_h': 3,
            'help.qa.tools_h': 3,
            'help.qa.issues_h': 3
          }; // For each section, squash all the texts into a single markdown document

          var docs = docKeys.map(function (key) {
            var helpkey = 'help.' + key[0];
            var helpPaneReplacements = {
              version: context.version
            };
            var text = key[1].reduce(function (all, part) {
              var subkey = helpkey + '.' + part;
              var depth = headings[subkey]; // is this subkey a heading?

              var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s

              return all + hhh + helpHtml(subkey, helpPaneReplacements) + '\n\n';
            }, '');
            return {
              title: _t.html(helpkey + '.title'),
              content: marked_1(text.trim()) // use keyboard key styling for shortcuts
              .replace(/<code>/g, '<kbd>').replace(/<\/code>/g, '<\/kbd>')
            };
          });
          var helpPane = uiPane('help', context).key(_t('help.key')).label(_t.html('help.title')).description(_t.html('help.title')).iconName('iD-icon-help');

          helpPane.renderContent = function (content) {
            function clickHelp(d, i) {
              var rtl = _mainLocalizer.textDirection() === 'rtl';
              content.property('scrollTop', 0);
              helpPane.selection().select('.pane-heading h2').html(d.title);
              body.html(d.content);
              body.selectAll('a').attr('target', '_blank');
              menuItems.classed('selected', function (m) {
                return m.title === d.title;
              });
              nav.html('');

              if (rtl) {
                nav.call(drawNext).call(drawPrevious);
              } else {
                nav.call(drawPrevious).call(drawNext);
              }

              function drawNext(selection) {
                if (i < docs.length - 1) {
                  var nextLink = selection.append('a').attr('href', '#').attr('class', 'next').on('click', function (d3_event) {
                    d3_event.preventDefault();
                    clickHelp(docs[i + 1], i + 1);
                  });
                  nextLink.append('span').html(docs[i + 1].title).call(svgIcon(rtl ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
                }
              }

              function drawPrevious(selection) {
                if (i > 0) {
                  var prevLink = selection.append('a').attr('href', '#').attr('class', 'previous').on('click', function (d3_event) {
                    d3_event.preventDefault();
                    clickHelp(docs[i - 1], i - 1);
                  });
                  prevLink.call(svgIcon(rtl ? '#iD-icon-forward' : '#iD-icon-backward', 'inline')).append('span').html(docs[i - 1].title);
                }
              }
            }

            function clickWalkthrough(d3_event) {
              d3_event.preventDefault();
              if (context.inIntro()) return;
              context.container().call(uiIntro(context));
              context.ui().togglePanes();
            }

            function clickShortcuts(d3_event) {
              d3_event.preventDefault();
              context.container().call(context.ui().shortcuts, true);
            }

            var toc = content.append('ul').attr('class', 'toc');
            var menuItems = toc.selectAll('li').data(docs).enter().append('li').append('a').attr('href', '#').html(function (d) {
              return d.title;
            }).on('click', function (d3_event, d) {
              d3_event.preventDefault();
              clickHelp(d, docs.indexOf(d));
            });
            var shortcuts = toc.append('li').attr('class', 'shortcuts').call(uiTooltip().title(_t.html('shortcuts.tooltip')).keys(['?']).placement('top')).append('a').attr('href', '#').on('click', clickShortcuts);
            shortcuts.append('div').html(_t.html('shortcuts.title'));
            var walkthrough = toc.append('li').attr('class', 'walkthrough').append('a').attr('href', '#').on('click', clickWalkthrough);
            walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
            walkthrough.append('div').html(_t.html('splash.walkthrough'));
            var helpContent = content.append('div').attr('class', 'left-content');
            var body = helpContent.append('div').attr('class', 'body');
            var nav = helpContent.append('div').attr('class', 'nav');
            clickHelp(docs[0], 0);
          };

          return helpPane;
        }

        function uiSectionValidationIssues(id, severity, context) {
          var _issues = [];
          var section = uiSection(id, context).label(function () {
            if (!_issues) return '';
            var issueCountText = _issues.length > 1000 ? '1000+' : String(_issues.length);
            return _t('inspector.title_count', {
              title: _t.html('issues.' + severity + 's.list_title'),
              count: issueCountText
            });
          }).disclosureContent(renderDisclosureContent).shouldDisplay(function () {
            return _issues && _issues.length;
          });

          function getOptions() {
            return {
              what: corePreferences('validate-what') || 'edited',
              where: corePreferences('validate-where') || 'all'
            };
          } // get and cache the issues to display, unordered


          function reloadIssues() {
            _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
          }

          function renderDisclosureContent(selection) {
            var center = context.map().center();
            var graph = context.graph(); // sort issues by distance away from the center of the map

            var issues = _issues.map(function withDistance(issue) {
              var extent = issue.extent(graph);
              var dist = extent ? geoSphericalDistance(center, extent.center()) : 0;
              return Object.assign(issue, {
                dist: dist
              });
            }).sort(function byDistance(a, b) {
              return a.dist - b.dist;
            }); // cut off at 1000


            issues = issues.slice(0, 1000); //renderIgnoredIssuesReset(_warningsSelection);

            selection.call(drawIssuesList, issues);
          }

          function drawIssuesList(selection, issues) {
            var list = selection.selectAll('.issues-list').data([0]);
            list = list.enter().append('ul').attr('class', 'layer-list issues-list ' + severity + 's-list').merge(list);
            var items = list.selectAll('li').data(issues, function (d) {
              return d.id;
            }); // Exit

            items.exit().remove(); // Enter

            var itemsEnter = items.enter().append('li').attr('class', function (d) {
              return 'issue severity-' + d.severity;
            });
            var labelsEnter = itemsEnter.append('button').attr('class', 'issue-label').on('click', function (d3_event, d) {
              context.validator().focusIssue(d);
            }).on('mouseover', function (d3_event, d) {
              utilHighlightEntities(d.entityIds, true, context);
            }).on('mouseout', function (d3_event, d) {
              utilHighlightEntities(d.entityIds, false, context);
            });
            var textEnter = labelsEnter.append('span').attr('class', 'issue-text');
            textEnter.append('span').attr('class', 'issue-icon').each(function (d) {
              var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
              select(this).call(svgIcon(iconName));
            });
            textEnter.append('span').attr('class', 'issue-message');
            /*
            labelsEnter
                .append('span')
                .attr('class', 'issue-autofix')
                .each(function(d) {
                    if (!d.autoFix) return;
                     d3_select(this)
                        .append('button')
                        .attr('title', t('issues.fix_one.title'))
                        .datum(d.autoFix)  // set button datum to the autofix
                        .attr('class', 'autofix action')
                        .on('click', function(d3_event, d) {
                            d3_event.preventDefault();
                            d3_event.stopPropagation();
                             var issuesEntityIDs = d.issue.entityIds;
                            utilHighlightEntities(issuesEntityIDs.concat(d.entityIds), false, context);
                             context.perform.apply(context, d.autoArgs);
                            context.validator().validate();
                        })
                        .call(svgIcon('#iD-icon-wrench'));
                });
            */
            // Update

            items = items.merge(itemsEnter).order();
            items.selectAll('.issue-message').html(function (d) {
              return d.message(context);
            });
            /*
            // autofix
            var canAutoFix = issues.filter(function(issue) { return issue.autoFix; });
             var autoFixAll = selection.selectAll('.autofix-all')
                .data(canAutoFix.length ? [0] : []);
             // exit
            autoFixAll.exit()
                .remove();
             // enter
            var autoFixAllEnter = autoFixAll.enter()
                .insert('div', '.issues-list')
                .attr('class', 'autofix-all');
             var linkEnter = autoFixAllEnter
                .append('a')
                .attr('class', 'autofix-all-link')
                .attr('href', '#');
             linkEnter
                .append('span')
                .attr('class', 'autofix-all-link-text')
                .html(t.html('issues.fix_all.title'));
             linkEnter
                .append('span')
                .attr('class', 'autofix-all-link-icon')
                .call(svgIcon('#iD-icon-wrench'));
             if (severity === 'warning') {
                renderIgnoredIssuesReset(selection);
            }
             // update
            autoFixAll = autoFixAll
                .merge(autoFixAllEnter);
             autoFixAll.selectAll('.autofix-all-link')
                .on('click', function() {
                    context.pauseChangeDispatch();
                    context.perform(actionNoop());
                    canAutoFix.forEach(function(issue) {
                        var args = issue.autoFix.autoArgs.slice();  // copy
                        if (typeof args[args.length - 1] !== 'function') {
                            args.pop();
                        }
                        args.push(t('issues.fix_all.annotation'));
                        context.replace.apply(context, args);
                    });
                    context.resumeChangeDispatch();
                    context.validator().validate();
                });
            */
          }

          context.validator().on('validated.uiSectionValidationIssues' + id, function () {
            window.requestIdleCallback(function () {
              reloadIssues();
              section.reRender();
            });
          });
          context.map().on('move.uiSectionValidationIssues' + id, debounce(function () {
            window.requestIdleCallback(function () {
              if (getOptions().where === 'visible') {
                // must refetch issues if they are viewport-dependent
                reloadIssues();
              } // always reload list to re-sort-by-distance


              section.reRender();
            });
          }, 1000));
          return section;
        }

        function uiSectionValidationOptions(context) {
          var section = uiSection('issues-options', context).content(renderContent);

          function renderContent(selection) {
            var container = selection.selectAll('.issues-options-container').data([0]);
            container = container.enter().append('div').attr('class', 'issues-options-container').merge(container);
            var data = [{
              key: 'what',
              values: ['edited', 'all']
            }, {
              key: 'where',
              values: ['visible', 'all']
            }];
            var options = container.selectAll('.issues-option').data(data, function (d) {
              return d.key;
            });
            var optionsEnter = options.enter().append('div').attr('class', function (d) {
              return 'issues-option issues-option-' + d.key;
            });
            optionsEnter.append('div').attr('class', 'issues-option-title').html(function (d) {
              return _t.html('issues.options.' + d.key + '.title');
            });
            var valuesEnter = optionsEnter.selectAll('label').data(function (d) {
              return d.values.map(function (val) {
                return {
                  value: val,
                  key: d.key
                };
              });
            }).enter().append('label');
            valuesEnter.append('input').attr('type', 'radio').attr('name', function (d) {
              return 'issues-option-' + d.key;
            }).attr('value', function (d) {
              return d.value;
            }).property('checked', function (d) {
              return getOptions()[d.key] === d.value;
            }).on('change', function (d3_event, d) {
              updateOptionValue(d3_event, d.key, d.value);
            });
            valuesEnter.append('span').html(function (d) {
              return _t.html('issues.options.' + d.key + '.' + d.value);
            });
          }

          function getOptions() {
            return {
              what: corePreferences('validate-what') || 'edited',
              // 'all', 'edited'
              where: corePreferences('validate-where') || 'all' // 'all', 'visible'

            };
          }

          function updateOptionValue(d3_event, d, val) {
            if (!val && d3_event && d3_event.target) {
              val = d3_event.target.value;
            }

            corePreferences('validate-' + d, val);
            context.validator().validate();
          }

          return section;
        }

        function uiSectionValidationRules(context) {
          var MINSQUARE = 0;
          var MAXSQUARE = 20;
          var DEFAULTSQUARE = 5; // see also unsquare_way.js

          var section = uiSection('issues-rules', context).disclosureContent(renderDisclosureContent).label(_t.html('issues.rules.title'));

          var _ruleKeys = context.validator().getRuleKeys().filter(function (key) {
            return key !== 'maprules';
          }).sort(function (key1, key2) {
            // alphabetize by localized title
            return _t('issues.' + key1 + '.title') < _t('issues.' + key2 + '.title') ? -1 : 1;
          });

          function renderDisclosureContent(selection) {
            var container = selection.selectAll('.issues-rulelist-container').data([0]);
            var containerEnter = container.enter().append('div').attr('class', 'issues-rulelist-container');
            containerEnter.append('ul').attr('class', 'layer-list issue-rules-list');
            var ruleLinks = containerEnter.append('div').attr('class', 'issue-rules-links section-footer');
            ruleLinks.append('a').attr('class', 'issue-rules-link').attr('href', '#').html(_t.html('issues.disable_all')).on('click', function (d3_event) {
              d3_event.preventDefault();
              context.validator().disableRules(_ruleKeys);
            });
            ruleLinks.append('a').attr('class', 'issue-rules-link').attr('href', '#').html(_t.html('issues.enable_all')).on('click', function (d3_event) {
              d3_event.preventDefault();
              context.validator().disableRules([]);
            }); // Update

            container = container.merge(containerEnter);
            container.selectAll('.issue-rules-list').call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
          }

          function drawListItems(selection, data, type, name, change, active) {
            var items = selection.selectAll('li').data(data); // Exit

            items.exit().remove(); // Enter

            var enter = items.enter().append('li');

            if (name === 'rule') {
              enter.call(uiTooltip().title(function (d) {
                return _t.html('issues.' + d + '.tip');
              }).placement('top'));
            }

            var label = enter.append('label');
            label.append('input').attr('type', type).attr('name', name).on('change', change);
            label.append('span').html(function (d) {
              var params = {};

              if (d === 'unsquare_way') {
                params.val = '<span class="square-degrees"></span>';
              }

              return _t.html('issues.' + d + '.title', params);
            }); // Update

            items = items.merge(enter);
            items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false); // user-configurable square threshold

            var degStr = corePreferences('validate-square-degrees');

            if (degStr === null) {
              degStr = DEFAULTSQUARE.toString();
            }

            var span = items.selectAll('.square-degrees');
            var input = span.selectAll('.square-degrees-input').data([0]); // enter / update

            input.enter().append('input').attr('type', 'number').attr('min', MINSQUARE.toString()).attr('max', MAXSQUARE.toString()).attr('step', '0.5').attr('class', 'square-degrees-input').call(utilNoAuto).on('click', function (d3_event) {
              d3_event.preventDefault();
              d3_event.stopPropagation();
              this.select();
            }).on('keyup', function (d3_event) {
              if (d3_event.keyCode === 13) {
                // ↩ Return
                this.blur();
                this.select();
              }
            }).on('blur', changeSquare).merge(input).property('value', degStr);
          }

          function changeSquare() {
            var input = select(this);
            var degStr = utilGetSetValue(input).trim();
            var degNum = parseFloat(degStr, 10);

            if (!isFinite(degNum)) {
              degNum = DEFAULTSQUARE;
            } else if (degNum > MAXSQUARE) {
              degNum = MAXSQUARE;
            } else if (degNum < MINSQUARE) {
              degNum = MINSQUARE;
            }

            degNum = Math.round(degNum * 10) / 10; // round to 1 decimal

            degStr = degNum.toString();
            input.property('value', degStr);
            corePreferences('validate-square-degrees', degStr);
            context.validator().revalidateUnsquare();
          }

          function isRuleEnabled(d) {
            return context.validator().isRuleEnabled(d);
          }

          function toggleRule(d3_event, d) {
            context.validator().toggleRule(d);
          }

          context.validator().on('validated.uiSectionValidationRules', function () {
            window.requestIdleCallback(section.reRender);
          });
          return section;
        }

        function uiSectionValidationStatus(context) {
          var section = uiSection('issues-status', context).content(renderContent).shouldDisplay(function () {
            var issues = context.validator().getIssues(getOptions());
            return issues.length === 0;
          });

          function getOptions() {
            return {
              what: corePreferences('validate-what') || 'edited',
              where: corePreferences('validate-where') || 'all'
            };
          }

          function renderContent(selection) {
            var box = selection.selectAll('.box').data([0]);
            var boxEnter = box.enter().append('div').attr('class', 'box');
            boxEnter.append('div').call(svgIcon('#iD-icon-apply', 'pre-text'));
            var noIssuesMessage = boxEnter.append('span');
            noIssuesMessage.append('strong').attr('class', 'message');
            noIssuesMessage.append('br');
            noIssuesMessage.append('span').attr('class', 'details');
            renderIgnoredIssuesReset(selection);
            setNoIssuesText(selection);
          }

          function renderIgnoredIssuesReset(selection) {
            var ignoredIssues = context.validator().getIssues({
              what: 'all',
              where: 'all',
              includeDisabledRules: true,
              includeIgnored: 'only'
            });
            var resetIgnored = selection.selectAll('.reset-ignored').data(ignoredIssues.length ? [0] : []); // exit

            resetIgnored.exit().remove(); // enter

            var resetIgnoredEnter = resetIgnored.enter().append('div').attr('class', 'reset-ignored section-footer');
            resetIgnoredEnter.append('a').attr('href', '#'); // update

            resetIgnored = resetIgnored.merge(resetIgnoredEnter);
            resetIgnored.select('a').html(_t('inspector.title_count', {
              title: _t.html('issues.reset_ignored'),
              count: ignoredIssues.length
            }));
            resetIgnored.on('click', function (d3_event) {
              d3_event.preventDefault();
              context.validator().resetIgnoredIssues();
            });
          }

          function setNoIssuesText(selection) {
            var opts = getOptions();

            function checkForHiddenIssues(cases) {
              for (var type in cases) {
                var hiddenOpts = cases[type];
                var hiddenIssues = context.validator().getIssues(hiddenOpts);

                if (hiddenIssues.length) {
                  selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.' + type, {
                    count: hiddenIssues.length.toString()
                  }));
                  return;
                }
              }

              selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.none'));
            }

            var messageType;

            if (opts.what === 'edited' && opts.where === 'visible') {
              messageType = 'edits_in_view';
              checkForHiddenIssues({
                elsewhere: {
                  what: 'edited',
                  where: 'all'
                },
                everything_else: {
                  what: 'all',
                  where: 'visible'
                },
                disabled_rules: {
                  what: 'edited',
                  where: 'visible',
                  includeDisabledRules: 'only'
                },
                everything_else_elsewhere: {
                  what: 'all',
                  where: 'all'
                },
                disabled_rules_elsewhere: {
                  what: 'edited',
                  where: 'all',
                  includeDisabledRules: 'only'
                },
                ignored_issues: {
                  what: 'edited',
                  where: 'visible',
                  includeIgnored: 'only'
                },
                ignored_issues_elsewhere: {
                  what: 'edited',
                  where: 'all',
                  includeIgnored: 'only'
                }
              });
            } else if (opts.what === 'edited' && opts.where === 'all') {
              messageType = 'edits';
              checkForHiddenIssues({
                everything_else: {
                  what: 'all',
                  where: 'all'
                },
                disabled_rules: {
                  what: 'edited',
                  where: 'all',
                  includeDisabledRules: 'only'
                },
                ignored_issues: {
                  what: 'edited',
                  where: 'all',
                  includeIgnored: 'only'
                }
              });
            } else if (opts.what === 'all' && opts.where === 'visible') {
              messageType = 'everything_in_view';
              checkForHiddenIssues({
                elsewhere: {
                  what: 'all',
                  where: 'all'
                },
                disabled_rules: {
                  what: 'all',
                  where: 'visible',
                  includeDisabledRules: 'only'
                },
                disabled_rules_elsewhere: {
                  what: 'all',
                  where: 'all',
                  includeDisabledRules: 'only'
                },
                ignored_issues: {
                  what: 'all',
                  where: 'visible',
                  includeIgnored: 'only'
                },
                ignored_issues_elsewhere: {
                  what: 'all',
                  where: 'all',
                  includeIgnored: 'only'
                }
              });
            } else if (opts.what === 'all' && opts.where === 'all') {
              messageType = 'everything';
              checkForHiddenIssues({
                disabled_rules: {
                  what: 'all',
                  where: 'all',
                  includeDisabledRules: 'only'
                },
                ignored_issues: {
                  what: 'all',
                  where: 'all',
                  includeIgnored: 'only'
                }
              });
            }

            if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
              messageType = 'no_edits';
            }

            selection.select('.box .message').html(_t.html('issues.no_issues.message.' + messageType));
          }

          context.validator().on('validated.uiSectionValidationStatus', function () {
            window.requestIdleCallback(section.reRender);
          });
          context.map().on('move.uiSectionValidationStatus', debounce(function () {
            window.requestIdleCallback(section.reRender);
          }, 1000));
          return section;
        }

        function uiPaneIssues(context) {
          var issuesPane = uiPane('issues', context).key(_t('issues.key')).label(_t.html('issues.title')).description(_t.html('issues.title')).iconName('iD-icon-alert').sections([uiSectionValidationOptions(context), uiSectionValidationStatus(context), uiSectionValidationIssues('issues-errors', 'error', context), uiSectionValidationIssues('issues-warnings', 'warning', context), uiSectionValidationRules(context)]);
          return issuesPane;
        }

        function uiSettingsCustomData(context) {
          var dispatch = dispatch$8('change');

          function render(selection) {
            var dataLayer = context.layers().layer('data'); // keep separate copies of original and current settings

            var _origSettings = {
              fileList: dataLayer && dataLayer.fileList() || null,
              url: corePreferences('settings-custom-data-url')
            };
            var _currSettings = {
              fileList: dataLayer && dataLayer.fileList() || null,
              url: corePreferences('settings-custom-data-url')
            }; // var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';

            var modal = uiConfirm(selection).okButton();
            modal.classed('settings-modal settings-custom-data', true);
            modal.select('.modal-section.header').append('h3').html(_t.html('settings.custom_data.header'));
            var textSection = modal.select('.modal-section.message-text');
            textSection.append('pre').attr('class', 'instructions-file').html(_t.html('settings.custom_data.file.instructions'));
            textSection.append('input').attr('class', 'field-file').attr('type', 'file').property('files', _currSettings.fileList) // works for all except IE11
            .on('change', function (d3_event) {
              var files = d3_event.target.files;

              if (files && files.length) {
                _currSettings.url = '';
                textSection.select('.field-url').property('value', '');
                _currSettings.fileList = files;
              } else {
                _currSettings.fileList = null;
              }
            });
            textSection.append('h4').html(_t.html('settings.custom_data.or'));
            textSection.append('pre').attr('class', 'instructions-url').html(_t.html('settings.custom_data.url.instructions'));
            textSection.append('textarea').attr('class', 'field-url').attr('placeholder', _t('settings.custom_data.url.placeholder')).call(utilNoAuto).property('value', _currSettings.url); // insert a cancel button

            var buttonSection = modal.select('.modal-section.buttons');
            buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
            buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
            buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);

            function isSaveDisabled() {
              return null;
            } // restore the original url


            function clickCancel() {
              textSection.select('.field-url').property('value', _origSettings.url);
              corePreferences('settings-custom-data-url', _origSettings.url);
              this.blur();
              modal.close();
            } // accept the current url


            function clickSave() {
              _currSettings.url = textSection.select('.field-url').property('value').trim(); // one or the other but not both

              if (_currSettings.url) {
                _currSettings.fileList = null;
              }

              if (_currSettings.fileList) {
                _currSettings.url = '';
              }

              corePreferences('settings-custom-data-url', _currSettings.url);
              this.blur();
              modal.close();
              dispatch.call('change', this, _currSettings);
            }
          }

          return utilRebind(render, dispatch, 'on');
        }

        function uiSectionDataLayers(context) {
          var settingsCustomData = uiSettingsCustomData(context).on('change', customChanged);
          var layers = context.layers();
          var section = uiSection('data-layers', context).label(_t.html('map_data.data_layers')).disclosureContent(renderDisclosureContent);

          function renderDisclosureContent(selection) {
            var container = selection.selectAll('.data-layer-container').data([0]);
            container.enter().append('div').attr('class', 'data-layer-container').merge(container).call(drawOsmItems).call(drawQAItems).call(drawCustomDataItems).call(drawVectorItems) // Beta - Detroit mapping challenge
            .call(drawPanelItems);
          }

          function showsLayer(which) {
            var layer = layers.layer(which);

            if (layer) {
              return layer.enabled();
            }

            return false;
          }

          function setLayer(which, enabled) {
            // Don't allow layer changes while drawing - #6584
            var mode = context.mode();
            if (mode && /^draw/.test(mode.id)) return;
            var layer = layers.layer(which);

            if (layer) {
              layer.enabled(enabled);

              if (!enabled && (which === 'osm' || which === 'notes')) {
                context.enter(modeBrowse(context));
              }
            }
          }

          function toggleLayer(which) {
            setLayer(which, !showsLayer(which));
          }

          function drawOsmItems(selection) {
            var osmKeys = ['osm', 'notes'];
            var osmLayers = layers.all().filter(function (obj) {
              return osmKeys.indexOf(obj.id) !== -1;
            });
            var ul = selection.selectAll('.layer-list-osm').data([0]);
            ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-osm').merge(ul);
            var li = ul.selectAll('.list-item').data(osmLayers);
            li.exit().remove();
            var liEnter = li.enter().append('li').attr('class', function (d) {
              return 'list-item list-item-' + d.id;
            });
            var labelEnter = liEnter.append('label').each(function (d) {
              if (d.id === 'osm') {
                select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).keys([uiCmd('⌥' + _t('area_fill.wireframe.key'))]).placement('bottom'));
              } else {
                select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
              }
            });
            labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
              toggleLayer(d.id);
            });
            labelEnter.append('span').html(function (d) {
              return _t.html('map_data.layers.' + d.id + '.title');
            }); // Update

            li.merge(liEnter).classed('active', function (d) {
              return d.layer.enabled();
            }).selectAll('input').property('checked', function (d) {
              return d.layer.enabled();
            });
          }

          function drawQAItems(selection) {
            var qaKeys = ['keepRight', 'improveOSM', 'osmose'];
            var qaLayers = layers.all().filter(function (obj) {
              return qaKeys.indexOf(obj.id) !== -1;
            });
            var ul = selection.selectAll('.layer-list-qa').data([0]);
            ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-qa').merge(ul);
            var li = ul.selectAll('.list-item').data(qaLayers);
            li.exit().remove();
            var liEnter = li.enter().append('li').attr('class', function (d) {
              return 'list-item list-item-' + d.id;
            });
            var labelEnter = liEnter.append('label').each(function (d) {
              select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
            });
            labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
              toggleLayer(d.id);
            });
            labelEnter.append('span').html(function (d) {
              return _t.html('map_data.layers.' + d.id + '.title');
            }); // Update

            li.merge(liEnter).classed('active', function (d) {
              return d.layer.enabled();
            }).selectAll('input').property('checked', function (d) {
              return d.layer.enabled();
            });
          } // Beta feature - sample vector layers to support Detroit Mapping Challenge
          // https://github.com/osmus/detroit-mapping-challenge


          function drawVectorItems(selection) {
            var dataLayer = layers.layer('data');
            var vtData = [{
              name: 'Detroit Neighborhoods/Parks',
              src: 'neighborhoods-parks',
              tooltip: 'Neighborhood boundaries and parks as compiled by City of Detroit in concert with community groups.',
              template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmur6x34562qp9iv1u3ksf-54hev,jonahadkins.cjksmqxdx33jj2wp90xd9x2md-4e5y2/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
            }, {
              name: 'Detroit Composite POIs',
              src: 'composite-poi',
              tooltip: 'Fire Inspections, Business Licenses, and other public location data collated from the City of Detroit.',
              template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmm6a02sli31myxhsr7zf3-2sw8h/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
            }, {
              name: 'Detroit All-The-Places POIs',
              src: 'alltheplaces-poi',
              tooltip: 'Public domain business location data created by web scrapers.',
              template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmswgk340g2vo06p1w9w0j-8fjjc/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
            }]; // Only show this if the map is around Detroit..

            var detroit = geoExtent([-83.5, 42.1], [-82.8, 42.5]);
            var showVectorItems = context.map().zoom() > 9 && detroit.contains(context.map().center());
            var container = selection.selectAll('.vectortile-container').data(showVectorItems ? [0] : []);
            container.exit().remove();
            var containerEnter = container.enter().append('div').attr('class', 'vectortile-container');
            containerEnter.append('h4').attr('class', 'vectortile-header').html('Detroit Vector Tiles (Beta)');
            containerEnter.append('ul').attr('class', 'layer-list layer-list-vectortile');
            containerEnter.append('div').attr('class', 'vectortile-footer').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmus/detroit-mapping-challenge').append('span').html('About these layers');
            container = container.merge(containerEnter);
            var ul = container.selectAll('.layer-list-vectortile');
            var li = ul.selectAll('.list-item').data(vtData);
            li.exit().remove();
            var liEnter = li.enter().append('li').attr('class', function (d) {
              return 'list-item list-item-' + d.src;
            });
            var labelEnter = liEnter.append('label').each(function (d) {
              select(this).call(uiTooltip().title(d.tooltip).placement('top'));
            });
            labelEnter.append('input').attr('type', 'radio').attr('name', 'vectortile').on('change', selectVTLayer);
            labelEnter.append('span').html(function (d) {
              return d.name;
            }); // Update

            li.merge(liEnter).classed('active', isVTLayerSelected).selectAll('input').property('checked', isVTLayerSelected);

            function isVTLayerSelected(d) {
              return dataLayer && dataLayer.template() === d.template;
            }

            function selectVTLayer(d3_event, d) {
              corePreferences('settings-custom-data-url', d.template);

              if (dataLayer) {
                dataLayer.template(d.template, d.src);
                dataLayer.enabled(true);
              }
            }
          }

          function drawCustomDataItems(selection) {
            var dataLayer = layers.layer('data');
            var hasData = dataLayer && dataLayer.hasData();
            var showsData = hasData && dataLayer.enabled();
            var ul = selection.selectAll('.layer-list-data').data(dataLayer ? [0] : []); // Exit

            ul.exit().remove(); // Enter

            var ulEnter = ul.enter().append('ul').attr('class', 'layer-list layer-list-data');
            var liEnter = ulEnter.append('li').attr('class', 'list-item-data');
            var labelEnter = liEnter.append('label').call(uiTooltip().title(_t.html('map_data.layers.custom.tooltip')).placement('top'));
            labelEnter.append('input').attr('type', 'checkbox').on('change', function () {
              toggleLayer('data');
            });
            labelEnter.append('span').html(_t.html('map_data.layers.custom.title'));
            liEnter.append('button').attr('class', 'open-data-options').call(uiTooltip().title(_t.html('settings.custom_data.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
              d3_event.preventDefault();
              editCustom();
            }).call(svgIcon('#iD-icon-more'));
            liEnter.append('button').attr('class', 'zoom-to-data').call(uiTooltip().title(_t.html('map_data.layers.custom.zoom')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
              if (select(this).classed('disabled')) return;
              d3_event.preventDefault();
              d3_event.stopPropagation();
              dataLayer.fitZoom();
            }).call(svgIcon('#iD-icon-framed-dot', 'monochrome')); // Update

            ul = ul.merge(ulEnter);
            ul.selectAll('.list-item-data').classed('active', showsData).selectAll('label').classed('deemphasize', !hasData).selectAll('input').property('disabled', !hasData).property('checked', showsData);
            ul.selectAll('button.zoom-to-data').classed('disabled', !hasData);
          }

          function editCustom() {
            context.container().call(settingsCustomData);
          }

          function customChanged(d) {
            var dataLayer = layers.layer('data');

            if (d && d.url) {
              dataLayer.url(d.url);
            } else if (d && d.fileList) {
              dataLayer.fileList(d.fileList);
            }
          }

          function drawPanelItems(selection) {
            var panelsListEnter = selection.selectAll('.md-extras-list').data([0]).enter().append('ul').attr('class', 'layer-list md-extras-list');
            var historyPanelLabelEnter = panelsListEnter.append('li').attr('class', 'history-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('map_data.history_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.history.key'))]).placement('top'));
            historyPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
              d3_event.preventDefault();
              context.ui().info.toggle('history');
            });
            historyPanelLabelEnter.append('span').html(_t.html('map_data.history_panel.title'));
            var measurementPanelLabelEnter = panelsListEnter.append('li').attr('class', 'measurement-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('map_data.measurement_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.measurement.key'))]).placement('top'));
            measurementPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
              d3_event.preventDefault();
              context.ui().info.toggle('measurement');
            });
            measurementPanelLabelEnter.append('span').html(_t.html('map_data.measurement_panel.title'));
          }

          context.layers().on('change.uiSectionDataLayers', section.reRender);
          context.map().on('move.uiSectionDataLayers', debounce(function () {
            // Detroit layers may have moved in or out of view
            window.requestIdleCallback(section.reRender);
          }, 1000));
          return section;
        }

        function uiSectionMapFeatures(context) {
          var _features = context.features().keys();

          var section = uiSection('map-features', context).label(_t.html('map_data.map_features')).disclosureContent(renderDisclosureContent).expandedByDefault(false);

          function renderDisclosureContent(selection) {
            var container = selection.selectAll('.layer-feature-list-container').data([0]);
            var containerEnter = container.enter().append('div').attr('class', 'layer-feature-list-container');
            containerEnter.append('ul').attr('class', 'layer-list layer-feature-list');
            var footer = containerEnter.append('div').attr('class', 'feature-list-links section-footer');
            footer.append('a').attr('class', 'feature-list-link').attr('href', '#').html(_t.html('issues.disable_all')).on('click', function (d3_event) {
              d3_event.preventDefault();
              context.features().disableAll();
            });
            footer.append('a').attr('class', 'feature-list-link').attr('href', '#').html(_t.html('issues.enable_all')).on('click', function (d3_event) {
              d3_event.preventDefault();
              context.features().enableAll();
            }); // Update

            container = container.merge(containerEnter);
            container.selectAll('.layer-feature-list').call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);
          }

          function drawListItems(selection, data, type, name, change, active) {
            var items = selection.selectAll('li').data(data); // Exit

            items.exit().remove(); // Enter

            var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
              var tip = _t.html(name + '.' + d + '.tooltip');

              if (autoHiddenFeature(d)) {
                var msg = showsLayer('osm') ? _t.html('map_data.autohidden') : _t.html('map_data.osmhidden');
                tip += '<div>' + msg + '</div>';
              }

              return tip;
            }).placement('top'));
            var label = enter.append('label');
            label.append('input').attr('type', type).attr('name', name).on('change', change);
            label.append('span').html(function (d) {
              return _t.html(name + '.' + d + '.description');
            }); // Update

            items = items.merge(enter);
            items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', autoHiddenFeature);
          }

          function autoHiddenFeature(d) {
            return context.features().autoHidden(d);
          }

          function showsFeature(d) {
            return context.features().enabled(d);
          }

          function clickFeature(d3_event, d) {
            context.features().toggle(d);
          }

          function showsLayer(id) {
            var layer = context.layers().layer(id);
            return layer && layer.enabled();
          } // add listeners


          context.features().on('change.map_features', section.reRender);
          return section;
        }

        function uiSectionMapStyleOptions(context) {
          var section = uiSection('fill-area', context).label(_t.html('map_data.style_options')).disclosureContent(renderDisclosureContent).expandedByDefault(false);

          function renderDisclosureContent(selection) {
            var container = selection.selectAll('.layer-fill-list').data([0]);
            container.enter().append('ul').attr('class', 'layer-list layer-fill-list').merge(container).call(drawListItems, context.map().areaFillOptions, 'radio', 'area_fill', setFill, isActiveFill);
            var container2 = selection.selectAll('.layer-visual-diff-list').data([0]);
            container2.enter().append('ul').attr('class', 'layer-list layer-visual-diff-list').merge(container2).call(drawListItems, ['highlight_edits'], 'checkbox', 'visual_diff', toggleHighlightEdited, function () {
              return context.surface().classed('highlight-edited');
            });
          }

          function drawListItems(selection, data, type, name, change, active) {
            var items = selection.selectAll('li').data(data); // Exit

            items.exit().remove(); // Enter

            var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
              return _t.html(name + '.' + d + '.tooltip');
            }).keys(function (d) {
              var key = d === 'wireframe' ? _t('area_fill.wireframe.key') : null;
              if (d === 'highlight_edits') key = _t('map_data.highlight_edits.key');
              return key ? [key] : null;
            }).placement('top'));
            var label = enter.append('label');
            label.append('input').attr('type', type).attr('name', name).on('change', change);
            label.append('span').html(function (d) {
              return _t.html(name + '.' + d + '.description');
            }); // Update

            items = items.merge(enter);
            items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false);
          }

          function isActiveFill(d) {
            return context.map().activeAreaFill() === d;
          }

          function toggleHighlightEdited(d3_event) {
            d3_event.preventDefault();
            context.map().toggleHighlightEdited();
          }

          function setFill(d3_event, d) {
            context.map().activeAreaFill(d);
          }

          context.map().on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
          return section;
        }

        function uiSectionPhotoOverlays(context) {
          var layers = context.layers();
          var section = uiSection('photo-overlays', context).label(_t.html('photo_overlays.title')).disclosureContent(renderDisclosureContent).expandedByDefault(false);

          function renderDisclosureContent(selection) {
            var container = selection.selectAll('.photo-overlay-container').data([0]);
            container.enter().append('div').attr('class', 'photo-overlay-container').merge(container).call(drawPhotoItems).call(drawPhotoTypeItems).call(drawDateFilter).call(drawUsernameFilter);
          }

          function drawPhotoItems(selection) {
            var photoKeys = context.photos().overlayLayerIDs();
            var photoLayers = layers.all().filter(function (obj) {
              return photoKeys.indexOf(obj.id) !== -1;
            });
            var data = photoLayers.filter(function (obj) {
              return obj.layer.supported();
            });

            function layerSupported(d) {
              return d.layer && d.layer.supported();
            }

            function layerEnabled(d) {
              return layerSupported(d) && d.layer.enabled();
            }

            var ul = selection.selectAll('.layer-list-photos').data([0]);
            ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photos').merge(ul);
            var li = ul.selectAll('.list-item-photos').data(data);
            li.exit().remove();
            var liEnter = li.enter().append('li').attr('class', function (d) {
              var classes = 'list-item-photos list-item-' + d.id;

              if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
                classes += ' indented';
              }

              return classes;
            });
            var labelEnter = liEnter.append('label').each(function (d) {
              var titleID;
              if (d.id === 'mapillary-signs') titleID = 'mapillary.signs.tooltip';else if (d.id === 'mapillary') titleID = 'mapillary_images.tooltip';else if (d.id === 'openstreetcam') titleID = 'openstreetcam_images.tooltip';else titleID = d.id.replace(/-/g, '_') + '.tooltip';
              select(this).call(uiTooltip().title(_t.html(titleID)).placement('top'));
            });
            labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
              toggleLayer(d.id);
            });
            labelEnter.append('span').html(function (d) {
              var id = d.id;
              if (id === 'mapillary-signs') id = 'photo_overlays.traffic_signs';
              return _t.html(id.replace(/-/g, '_') + '.title');
            }); // Update

            li.merge(liEnter).classed('active', layerEnabled).selectAll('input').property('checked', layerEnabled);
          }

          function drawPhotoTypeItems(selection) {
            var data = context.photos().allPhotoTypes();

            function typeEnabled(d) {
              return context.photos().showsPhotoType(d);
            }

            var ul = selection.selectAll('.layer-list-photo-types').data([0]);
            ul.exit().remove();
            ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photo-types').merge(ul);
            var li = ul.selectAll('.list-item-photo-types').data(context.photos().shouldFilterByPhotoType() ? data : []);
            li.exit().remove();
            var liEnter = li.enter().append('li').attr('class', function (d) {
              return 'list-item-photo-types list-item-' + d;
            });
            var labelEnter = liEnter.append('label').each(function (d) {
              select(this).call(uiTooltip().title(_t.html('photo_overlays.photo_type.' + d + '.tooltip')).placement('top'));
            });
            labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
              context.photos().togglePhotoType(d);
            });
            labelEnter.append('span').html(function (d) {
              return _t.html('photo_overlays.photo_type.' + d + '.title');
            }); // Update

            li.merge(liEnter).classed('active', typeEnabled).selectAll('input').property('checked', typeEnabled);
          }

          function drawDateFilter(selection) {
            var data = context.photos().dateFilters();

            function filterEnabled(d) {
              return context.photos().dateFilterValue(d);
            }

            var ul = selection.selectAll('.layer-list-date-filter').data([0]);
            ul.exit().remove();
            ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-date-filter').merge(ul);
            var li = ul.selectAll('.list-item-date-filter').data(context.photos().shouldFilterByDate() ? data : []);
            li.exit().remove();
            var liEnter = li.enter().append('li').attr('class', 'list-item-date-filter');
            var labelEnter = liEnter.append('label').each(function (d) {
              select(this).call(uiTooltip().title(_t.html('photo_overlays.date_filter.' + d + '.tooltip')).placement('top'));
            });
            labelEnter.append('span').html(function (d) {
              return _t.html('photo_overlays.date_filter.' + d + '.title');
            });
            labelEnter.append('input').attr('type', 'date').attr('class', 'list-item-input').attr('placeholder', _t('units.year_month_day')).call(utilNoAuto).each(function (d) {
              utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
            }).on('change', function (d3_event, d) {
              var value = utilGetSetValue(select(this)).trim();
              context.photos().setDateFilter(d, value, true); // reload the displayed dates

              li.selectAll('input').each(function (d) {
                utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
              });
            });
            li = li.merge(liEnter).classed('active', filterEnabled);
          }

          function drawUsernameFilter(selection) {
            function filterEnabled() {
              return context.photos().usernames();
            }

            var ul = selection.selectAll('.layer-list-username-filter').data([0]);
            ul.exit().remove();
            ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-username-filter').merge(ul);
            var li = ul.selectAll('.list-item-username-filter').data(context.photos().shouldFilterByUsername() ? ['username-filter'] : []);
            li.exit().remove();
            var liEnter = li.enter().append('li').attr('class', 'list-item-username-filter');
            var labelEnter = liEnter.append('label').each(function () {
              select(this).call(uiTooltip().title(_t.html('photo_overlays.username_filter.tooltip')).placement('top'));
            });
            labelEnter.append('span').html(_t.html('photo_overlays.username_filter.title'));
            labelEnter.append('input').attr('type', 'text').attr('class', 'list-item-input').call(utilNoAuto).property('value', usernameValue).on('change', function () {
              var value = select(this).property('value');
              context.photos().setUsernameFilter(value, true);
              select(this).property('value', usernameValue);
            });
            li.merge(liEnter).classed('active', filterEnabled);

            function usernameValue() {
              var usernames = context.photos().usernames();
              if (usernames) return usernames.join('; ');
              return usernames;
            }
          }

          function toggleLayer(which) {
            setLayer(which, !showsLayer(which));
          }

          function showsLayer(which) {
            var layer = layers.layer(which);

            if (layer) {
              return layer.enabled();
            }

            return false;
          }

          function setLayer(which, enabled) {
            var layer = layers.layer(which);

            if (layer) {
              layer.enabled(enabled);
            }
          }

          context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
          context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
          return section;
        }

        function uiPaneMapData(context) {
          var mapDataPane = uiPane('map-data', context).key(_t('map_data.key')).label(_t.html('map_data.title')).description(_t.html('map_data.description')).iconName('iD-icon-data').sections([uiSectionDataLayers(context), uiSectionPhotoOverlays(context), uiSectionMapStyleOptions(context), uiSectionMapFeatures(context)]);
          return mapDataPane;
        }

        function uiSectionPrivacy(context) {
          var section = uiSection('preferences-third-party', context).label(_t.html('preferences.privacy.title')).disclosureContent(renderDisclosureContent);

          var _showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';

          function renderDisclosureContent(selection) {
            // enter
            var privacyOptionsListEnter = selection.selectAll('.privacy-options-list').data([0]).enter().append('ul').attr('class', 'layer-list privacy-options-list');
            var thirdPartyIconsEnter = privacyOptionsListEnter.append('li').attr('class', 'privacy-third-party-icons-item').append('label').call(uiTooltip().title(_t.html('preferences.privacy.third_party_icons.tooltip')).placement('bottom'));
            thirdPartyIconsEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
              d3_event.preventDefault();
              _showThirdPartyIcons = _showThirdPartyIcons === 'true' ? 'false' : 'true';
              corePreferences('preferences.privacy.thirdpartyicons', _showThirdPartyIcons);
              update();
            });
            thirdPartyIconsEnter.append('span').html(_t.html('preferences.privacy.third_party_icons.description')); // Privacy Policy link

            selection.selectAll('.privacy-link').data([0]).enter().append('div').attr('class', 'privacy-link').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/openstreetmap/iD/blob/release/PRIVACY.md').append('span').html(_t.html('preferences.privacy.privacy_link'));
            update();

            function update() {
              selection.selectAll('.privacy-third-party-icons-item').classed('active', _showThirdPartyIcons === 'true').select('input').property('checked', _showThirdPartyIcons === 'true');
            }
          }

          return section;
        }

        function uiPanePreferences(context) {
          var preferencesPane = uiPane('preferences', context).key(_t('preferences.key')).label(_t.html('preferences.title')).description(_t.html('preferences.description')).iconName('fas-user-cog').sections([uiSectionPrivacy(context)]);
          return preferencesPane;
        }

        function uiInit(context) {
          var _initCounter = 0;
          var _needWidth = {};

          var _lastPointerType;

          function render(container) {
            container.on('click.ui', function (d3_event) {
              // we're only concerned with the primary mouse button
              if (d3_event.button !== 0) return;
              if (!d3_event.composedPath) return; // some targets have default click events we don't want to override

              var isOkayTarget = d3_event.composedPath().some(function (node) {
                // we only care about element nodes
                return node.nodeType === 1 && ( // clicking <input> focuses it and/or changes a value
                node.nodeName === 'INPUT' || // clicking <label> affects its <input> by default
                node.nodeName === 'LABEL' || // clicking <a> opens a hyperlink by default
                node.nodeName === 'A');
              });
              if (isOkayTarget) return; // disable double-tap-to-zoom on touchscreens

              d3_event.preventDefault();
            });
            var detected = utilDetect(); // only WebKit supports gesture events

            if ('GestureEvent' in window && // Listening for gesture events on iOS 13.4+ breaks double-tapping,
            // but we only need to do this on desktop Safari anyway. – #7694
            !detected.isMobileWebKit) {
              // On iOS we disable pinch-to-zoom of the UI via the `touch-action`
              // CSS property, but on desktop Safari we need to manually cancel the
              // default gesture events.
              container.on('gesturestart.ui gesturechange.ui gestureend.ui', function (d3_event) {
                // disable pinch-to-zoom of the UI via multitouch trackpads on macOS Safari
                d3_event.preventDefault();
              });
            }

            if ('PointerEvent' in window) {
              select(window).on('pointerdown.ui pointerup.ui', function (d3_event) {
                var pointerType = d3_event.pointerType || 'mouse';

                if (_lastPointerType !== pointerType) {
                  _lastPointerType = pointerType;
                  container.attr('pointer', pointerType);
                }
              }, true);
            } else {
              _lastPointerType = 'mouse';
              container.attr('pointer', 'mouse');
            }

            container.attr('lang', _mainLocalizer.localeCode()).attr('dir', _mainLocalizer.textDirection()); // setup fullscreen keybindings (no button shown at this time)

            container.call(uiFullScreen(context));
            var map = context.map();
            map.redrawEnable(false); // don't draw until we've set zoom/lat/long

            map.on('hitMinZoom.ui', function () {
              ui.flash.iconName('#iD-icon-no').label(_t.html('cannot_zoom'))();
            });
            container.append('svg').attr('id', 'ideditor-defs').call(ui.svgDefs);
            container.append('div').attr('class', 'sidebar').call(ui.sidebar);
            var content = container.append('div').attr('class', 'main-content active'); // Top toolbar

            content.append('div').attr('class', 'top-toolbar-wrap').append('div').attr('class', 'top-toolbar fillD').call(uiTopToolbar(context));
            content.append('div').attr('class', 'main-map').attr('dir', 'ltr').call(map);
            var overMap = content.append('div').attr('class', 'over-map'); // HACK: Mobile Safari 14 likes to select anything selectable when long-
            // pressing, even if it's not targeted. This conflicts with long-pressing
            // to show the edit menu. We add a selectable offscreen element as the first
            // child to trick Safari into not showing the selection UI.

            overMap.append('div').attr('class', 'select-trap').text('t');
            overMap.call(uiMapInMap(context)).call(uiNotice(context));
            overMap.append('div').attr('class', 'spinner').call(uiSpinner(context)); // Map controls

            var controls = overMap.append('div').attr('class', 'map-controls');
            controls.append('div').attr('class', 'map-control zoombuttons').call(uiZoom(context));
            controls.append('div').attr('class', 'map-control zoom-to-selection-control').call(uiZoomToSelection(context));
            controls.append('div').attr('class', 'map-control geolocate-control').call(uiGeolocate(context)); // Add panes
            // This should happen after map is initialized, as some require surface()

            var panes = overMap.append('div').attr('class', 'map-panes');
            var uiPanes = [uiPaneBackground(context), uiPaneMapData(context), uiPaneIssues(context), uiPanePreferences(context), uiPaneHelp(context)];
            uiPanes.forEach(function (pane) {
              controls.append('div').attr('class', 'map-control map-pane-control ' + pane.id + '-control').call(pane.renderToggleButton);
              panes.call(pane.renderPane);
            });
            ui.info = uiInfo(context);
            overMap.call(ui.info);
            overMap.append('div').attr('class', 'photoviewer').classed('al', true) // 'al'=left,  'ar'=right
            .classed('hide', true).call(ui.photoviewer);
            overMap.append('div').attr('class', 'attribution-wrap').attr('dir', 'ltr').call(uiAttribution(context)); // Add footer

            var about = content.append('div').attr('class', 'map-footer');
            about.append('div').attr('class', 'api-status').call(uiStatus(context));
            var footer = about.append('div').attr('class', 'map-footer-bar fillD');
            footer.append('div').attr('class', 'flash-wrap footer-hide');
            var footerWrap = footer.append('div').attr('class', 'main-footer-wrap footer-show');
            footerWrap.append('div').attr('class', 'scale-block').call(uiScale(context));
            var aboutList = footerWrap.append('div').attr('class', 'info-block').append('ul').attr('class', 'map-footer-list');
            aboutList.append('li').attr('class', 'user-list').call(uiContributors(context));
            var apiConnections = context.apiConnections();

            if (apiConnections && apiConnections.length > 1) {
              aboutList.append('li').attr('class', 'source-switch').call(uiSourceSwitch(context).keys(apiConnections));
            }

            aboutList.append('li').attr('class', 'issues-info').call(uiIssuesInfo(context));
            aboutList.append('li').attr('class', 'feature-warning').call(uiFeatureInfo(context));
            var issueLinks = aboutList.append('li');
            issueLinks.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/issues').call(svgIcon('#iD-icon-bug', 'light')).call(uiTooltip().title(_t.html('report_a_bug')).placement('top'));
            issueLinks.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/blob/develop/CONTRIBUTING.md#translating').call(svgIcon('#iD-icon-translate', 'light')).call(uiTooltip().title(_t.html('help_translate')).placement('top'));
            aboutList.append('li').attr('class', 'version').call(uiVersion(context));

            if (!context.embed()) {
              aboutList.call(uiAccount(context));
            } // Setup map dimensions and move map to initial center/zoom.
            // This should happen after .main-content and toolbars exist.


            ui.onResize();
            map.redrawEnable(true);
            ui.hash = behaviorHash(context);
            ui.hash();

            if (!ui.hash.hadHash) {
              map.centerZoom([0, 0], 2);
            } // Bind events


            window.onbeforeunload = function () {
              return context.save();
            };

            window.onunload = function () {
              context.history().unlock();
            };

            select(window).on('resize.editor', function () {
              ui.onResize();
            });
            var panPixels = 80;
            context.keybinding().on('⌫', function (d3_event) {
              d3_event.preventDefault();
            }).on([_t('sidebar.key'), '`', '²', '@'], ui.sidebar.toggle) // #5663, #6864 - common QWERTY, AZERTY
            .on('←', pan([panPixels, 0])).on('↑', pan([0, panPixels])).on('→', pan([-panPixels, 0])).on('↓', pan([0, -panPixels])).on(uiCmd('⌥←'), pan([map.dimensions()[0], 0])).on(uiCmd('⌥↑'), pan([0, map.dimensions()[1]])).on(uiCmd('⌥→'), pan([-map.dimensions()[0], 0])).on(uiCmd('⌥↓'), pan([0, -map.dimensions()[1]])).on(uiCmd('⌘' + _t('background.key')), function quickSwitch(d3_event) {
              if (d3_event) {
                d3_event.stopImmediatePropagation();
                d3_event.preventDefault();
              }

              var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));

              if (previousBackground) {
                var currentBackground = context.background().baseLayerSource();
                corePreferences('background-last-used-toggle', currentBackground.id);
                corePreferences('background-last-used', previousBackground.id);
                context.background().baseLayerSource(previousBackground);
              }
            }).on(_t('area_fill.wireframe.key'), function toggleWireframe(d3_event) {
              d3_event.preventDefault();
              d3_event.stopPropagation();
              context.map().toggleWireframe();
            }).on(uiCmd('⌥' + _t('area_fill.wireframe.key')), function toggleOsmData(d3_event) {
              d3_event.preventDefault();
              d3_event.stopPropagation(); // Don't allow layer changes while drawing - #6584

              var mode = context.mode();
              if (mode && /^draw/.test(mode.id)) return;
              var layer = context.layers().layer('osm');

              if (layer) {
                layer.enabled(!layer.enabled());

                if (!layer.enabled()) {
                  context.enter(modeBrowse(context));
                }
              }
            }).on(_t('map_data.highlight_edits.key'), function toggleHighlightEdited(d3_event) {
              d3_event.preventDefault();
              context.map().toggleHighlightEdited();
            });
            context.on('enter.editor', function (entered) {
              container.classed('mode-' + entered.id, true);
            }).on('exit.editor', function (exited) {
              container.classed('mode-' + exited.id, false);
            });
            context.enter(modeBrowse(context));

            if (!_initCounter++) {
              if (!ui.hash.startWalkthrough) {
                context.container().call(uiSplash(context)).call(uiRestore(context));
              }

              context.container().call(ui.shortcuts);
            }

            var osm = context.connection();
            var auth = uiLoading(context).message(_t.html('loading_auth')).blocking(true);

            if (osm && auth) {
              osm.on('authLoading.ui', function () {
                context.container().call(auth);
              }).on('authDone.ui', function () {
                auth.close();
              });
            }

            _initCounter++;

            if (ui.hash.startWalkthrough) {
              ui.hash.startWalkthrough = false;
              context.container().call(uiIntro(context));
            }

            function pan(d) {
              return function (d3_event) {
                if (d3_event.shiftKey) return;
                if (context.container().select('.combobox').size()) return;
                d3_event.preventDefault();
                context.map().pan(d, 100);
              };
            }
          }

          var ui = {};

          var _loadPromise; // renders the iD interface into the container node


          ui.ensureLoaded = function () {
            if (_loadPromise) return _loadPromise;
            return _loadPromise = Promise.all([// must have strings and presets before loading the UI
            _mainLocalizer.ensureLoaded(), _mainPresetIndex.ensureLoaded()]).then(function () {
              if (!context.container().empty()) render(context.container());
            })["catch"](function (err) {
              return console.error(err);
            }); // eslint-disable-line
          }; // `ui.restart()` will destroy and rebuild the entire iD interface,
          // for example to switch the locale while iD is running.


          ui.restart = function () {
            context.keybinding().clear();
            _loadPromise = null;
            context.container().selectAll('*').remove();
            ui.ensureLoaded();
          };

          ui.lastPointerType = function () {
            return _lastPointerType;
          };

          ui.svgDefs = svgDefs(context);
          ui.flash = uiFlash(context);
          ui.sidebar = uiSidebar(context);
          ui.photoviewer = uiPhotoviewer(context);
          ui.shortcuts = uiShortcuts(context);

          ui.onResize = function (withPan) {
            var map = context.map(); // Recalc dimensions of map and sidebar.. (`true` = force recalc)
            // This will call `getBoundingClientRect` and trigger reflow,
            //  but the values will be cached for later use.

            var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
            utilGetDimensions(context.container().select('.sidebar'), true);

            if (withPan !== undefined) {
              map.redrawEnable(false);
              map.pan(withPan);
              map.redrawEnable(true);
            }

            map.dimensions(mapDimensions);
            ui.photoviewer.onMapResize(); // check if header or footer have overflowed

            ui.checkOverflow('.top-toolbar');
            ui.checkOverflow('.map-footer-bar'); // Use outdated code so it works on Explorer

            var resizeWindowEvent = document.createEvent('Event');
            resizeWindowEvent.initEvent('resizeWindow', true, true);
            document.dispatchEvent(resizeWindowEvent);
          }; // Call checkOverflow when resizing or whenever the contents change.


          ui.checkOverflow = function (selector, reset) {
            if (reset) {
              delete _needWidth[selector];
            }

            var selection = context.container().select(selector);
            if (selection.empty()) return;
            var scrollWidth = selection.property('scrollWidth');
            var clientWidth = selection.property('clientWidth');
            var needed = _needWidth[selector] || scrollWidth;

            if (scrollWidth > clientWidth) {
              // overflow happening
              selection.classed('narrow', true);

              if (!_needWidth[selector]) {
                _needWidth[selector] = scrollWidth;
              }
            } else if (scrollWidth >= needed) {
              selection.classed('narrow', false);
            }
          };

          ui.togglePanes = function (showPane) {
            var hidePanes = context.container().selectAll('.map-pane.shown');
            var side = _mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left';
            hidePanes.classed('shown', false).classed('hide', true);
            context.container().selectAll('.map-pane-control button').classed('active', false);

            if (showPane) {
              hidePanes.classed('shown', false).classed('hide', true).style(side, '-500px');
              context.container().selectAll('.' + showPane.attr('pane') + '-control button').classed('active', true);
              showPane.classed('shown', true).classed('hide', false);

              if (hidePanes.empty()) {
                showPane.style(side, '-500px').transition().duration(200).style(side, '0px');
              } else {
                showPane.style(side, '0px');
              }
            } else {
              hidePanes.classed('shown', true).classed('hide', false).style(side, '0px').transition().duration(200).style(side, '-500px').on('end', function () {
                select(this).classed('shown', false).classed('hide', true);
              });
            }
          };

          var _editMenu = uiEditMenu(context);

          ui.editMenu = function () {
            return _editMenu;
          };

          ui.showEditMenu = function (anchorPoint, triggerType, operations) {
            // remove any displayed menu
            ui.closeEditMenu();
            if (!operations && context.mode().operations) operations = context.mode().operations();
            if (!operations || !operations.length) return; // disable menu if in wide selection, for example

            if (!context.map().editableDataEnabled()) return;
            var surfaceNode = context.surface().node();

            if (surfaceNode.focus) {
              // FF doesn't support it
              // focus the surface or else clicking off the menu may not trigger modeBrowse
              surfaceNode.focus();
            }

            operations.forEach(function (operation) {
              if (operation.point) operation.point(anchorPoint);
            });

            _editMenu.anchorLoc(anchorPoint).triggerType(triggerType).operations(operations); // render the menu


            context.map().supersurface.call(_editMenu);
          };

          ui.closeEditMenu = function () {
            // remove any existing menu no matter how it was added
            context.map().supersurface.select('.edit-menu').remove();
          };

          var _saveLoading = select(null);

          context.uploader().on('saveStarted.ui', function () {
            _saveLoading = uiLoading(context).message(_t.html('save.uploading')).blocking(true);
            context.container().call(_saveLoading); // block input during upload
          }).on('saveEnded.ui', function () {
            _saveLoading.close();

            _saveLoading = select(null);
          });
          return ui;
        }

        function coreContext() {
          var _this = this;

          var dispatch = dispatch$8('enter', 'exit', 'change');
          var context = utilRebind({}, dispatch, 'on');

          var _deferred = new Set();

          context.version = '2.20.1';
          context.privacyVersion = '20201202'; // iD will alter the hash so cache the parameters intended to setup the session

          context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
          context.isFirstSession = !corePreferences('sawSplash') && !corePreferences('sawPrivacyVersion');
          /* Changeset */
          // An osmChangeset object. Not loaded until needed.

          context.changeset = null;
          var _defaultChangesetComment = context.initialHashParams.comment;
          var _defaultChangesetSource = context.initialHashParams.source;
          var _defaultChangesetHashtags = context.initialHashParams.hashtags;

          context.defaultChangesetComment = function (val) {
            if (!arguments.length) return _defaultChangesetComment;
            _defaultChangesetComment = val;
            return context;
          };

          context.defaultChangesetSource = function (val) {
            if (!arguments.length) return _defaultChangesetSource;
            _defaultChangesetSource = val;
            return context;
          };

          context.defaultChangesetHashtags = function (val) {
            if (!arguments.length) return _defaultChangesetHashtags;
            _defaultChangesetHashtags = val;
            return context;
          };
          /* Document title */

          /* (typically shown as the label for the browser window/tab) */
          // If true, iD will update the title based on what the user is doing


          var _setsDocumentTitle = true;

          context.setsDocumentTitle = function (val) {
            if (!arguments.length) return _setsDocumentTitle;
            _setsDocumentTitle = val;
            return context;
          }; // The part of the title that is always the same


          var _documentTitleBase = document.title;

          context.documentTitleBase = function (val) {
            if (!arguments.length) return _documentTitleBase;
            _documentTitleBase = val;
            return context;
          };
          /* User interface and keybinding */


          var _ui;

          context.ui = function () {
            return _ui;
          };

          context.lastPointerType = function () {
            return _ui.lastPointerType();
          };

          var _keybinding = utilKeybinding('context');

          context.keybinding = function () {
            return _keybinding;
          };

          select(document).call(_keybinding);
          /* Straight accessors. Avoid using these if you can. */
          // Instantiate the connection here because it doesn't require passing in
          // `context` and it's needed for pre-init calls like `preauth`

          var _connection = services.osm;

          var _history;

          var _validator;

          var _uploader;

          context.connection = function () {
            return _connection;
          };

          context.history = function () {
            return _history;
          };

          context.validator = function () {
            return _validator;
          };

          context.uploader = function () {
            return _uploader;
          };
          /* Connection */


          context.preauth = function (options) {
            if (_connection) {
              _connection["switch"](options);
            }

            return context;
          };
          /* connection options for source switcher (optional) */


          var _apiConnections;

          context.apiConnections = function (val) {
            if (!arguments.length) return _apiConnections;
            _apiConnections = val;
            return context;
          }; // A string or array or locale codes to prefer over the browser's settings


          context.locale = function (locale) {
            if (!arguments.length) return _mainLocalizer.localeCode();
            _mainLocalizer.preferredLocaleCodes(locale);
            return context;
          };

          function afterLoad(cid, callback) {
            return function (err, result) {
              if (err) {
                // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
                if (err.status === 400 || err.status === 401 || err.status === 403) {
                  if (_connection) {
                    _connection.logout();
                  }
                }

                if (typeof callback === 'function') {
                  callback(err);
                }

                return;
              } else if (_connection && _connection.getConnectionId() !== cid) {
                if (typeof callback === 'function') {
                  callback({
                    message: 'Connection Switched',
                    status: -1
                  });
                }

                return;
              } else {
                _history.merge(result.data, result.extent);

                if (typeof callback === 'function') {
                  callback(err, result);
                }

                return;
              }
            };
          }

          context.loadTiles = function (projection, callback) {
            var handle = window.requestIdleCallback(function () {
              _deferred["delete"](handle);

              if (_connection && context.editableDataEnabled()) {
                var cid = _connection.getConnectionId();

                _connection.loadTiles(projection, afterLoad(cid, callback));
              }
            });

            _deferred.add(handle);
          };

          context.loadTileAtLoc = function (loc, callback) {
            var handle = window.requestIdleCallback(function () {
              _deferred["delete"](handle);

              if (_connection && context.editableDataEnabled()) {
                var cid = _connection.getConnectionId();

                _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
              }
            });

            _deferred.add(handle);
          }; // Download the full entity and its parent relations. The callback may be called multiple times.


          context.loadEntity = function (entityID, callback) {
            if (_connection) {
              var cid = _connection.getConnectionId();

              _connection.loadEntity(entityID, afterLoad(cid, callback)); // We need to fetch the parent relations separately.


              _connection.loadEntityRelations(entityID, afterLoad(cid, callback));
            }
          };

          context.zoomToEntity = function (entityID, zoomTo) {
            // be sure to load the entity even if we're not going to zoom to it
            context.loadEntity(entityID, function (err, result) {
              if (err) return;

              if (zoomTo !== false) {
                var entity = result.data.find(function (e) {
                  return e.id === entityID;
                });

                if (entity) {
                  _map.zoomTo(entity);
                }
              }
            });

            _map.on('drawn.zoomToEntity', function () {
              if (!context.hasEntity(entityID)) return;

              _map.on('drawn.zoomToEntity', null);

              context.on('enter.zoomToEntity', null);
              context.enter(modeSelect(context, [entityID]));
            });

            context.on('enter.zoomToEntity', function () {
              if (_mode.id !== 'browse') {
                _map.on('drawn.zoomToEntity', null);

                context.on('enter.zoomToEntity', null);
              }
            });
          };

          var _minEditableZoom = 16;

          context.minEditableZoom = function (val) {
            if (!arguments.length) return _minEditableZoom;
            _minEditableZoom = val;

            if (_connection) {
              _connection.tileZoom(val);
            }

            return context;
          }; // String length limits in Unicode characters, not JavaScript UTF-16 code units


          context.maxCharsForTagKey = function () {
            return 255;
          };

          context.maxCharsForTagValue = function () {
            return 255;
          };

          context.maxCharsForRelationRole = function () {
            return 255;
          };

          function cleanOsmString(val, maxChars) {
            // be lenient with input
            if (val === undefined || val === null) {
              val = '';
            } else {
              val = val.toString();
            } // remove whitespace


            val = val.trim(); // use the canonical form of the string

            if (val.normalize) val = val.normalize('NFC'); // trim to the number of allowed characters

            return utilUnicodeCharsTruncated(val, maxChars);
          }

          context.cleanTagKey = function (val) {
            return cleanOsmString(val, context.maxCharsForTagKey());
          };

          context.cleanTagValue = function (val) {
            return cleanOsmString(val, context.maxCharsForTagValue());
          };

          context.cleanRelationRole = function (val) {
            return cleanOsmString(val, context.maxCharsForRelationRole());
          };
          /* History */


          var _inIntro = false;

          context.inIntro = function (val) {
            if (!arguments.length) return _inIntro;
            _inIntro = val;
            return context;
          }; // Immediately save the user's history to localstorage, if possible
          // This is called someteimes, but also on the `window.onbeforeunload` handler


          context.save = function () {
            // no history save, no message onbeforeunload
            if (_inIntro || context.container().select('.modal').size()) return;
            var canSave;

            if (_mode && _mode.id === 'save') {
              canSave = false; // Attempt to prevent user from creating duplicate changes - see #5200

              if (services.osm && services.osm.isChangesetInflight()) {
                _history.clearSaved();

                return;
              }
            } else {
              canSave = context.selectedIDs().every(function (id) {
                var entity = context.hasEntity(id);
                return entity && !entity.isDegenerate();
              });
            }

            if (canSave) {
              _history.save();
            }

            if (_history.hasChanges()) {
              return _t('save.unsaved_changes');
            }
          }; // Debounce save, since it's a synchronous localStorage write,
          // and history changes can happen frequently (e.g. when dragging).


          context.debouncedSave = debounce(context.save, 350);

          function withDebouncedSave(fn) {
            return function () {
              var result = fn.apply(_history, arguments);
              context.debouncedSave();
              return result;
            };
          }
          /* Graph */


          context.hasEntity = function (id) {
            return _history.graph().hasEntity(id);
          };

          context.entity = function (id) {
            return _history.graph().entity(id);
          };
          /* Modes */


          var _mode;

          context.mode = function () {
            return _mode;
          };

          context.enter = function (newMode) {
            if (_mode) {
              _mode.exit();

              dispatch.call('exit', _this, _mode);
            }

            _mode = newMode;

            _mode.enter();

            dispatch.call('enter', _this, _mode);
          };

          context.selectedIDs = function () {
            return _mode && _mode.selectedIDs && _mode.selectedIDs() || [];
          };

          context.activeID = function () {
            return _mode && _mode.activeID && _mode.activeID();
          };

          var _selectedNoteID;

          context.selectedNoteID = function (noteID) {
            if (!arguments.length) return _selectedNoteID;
            _selectedNoteID = noteID;
            return context;
          }; // NOTE: Don't change the name of this until UI v3 is merged


          var _selectedErrorID;

          context.selectedErrorID = function (errorID) {
            if (!arguments.length) return _selectedErrorID;
            _selectedErrorID = errorID;
            return context;
          };
          /* Behaviors */


          context.install = function (behavior) {
            return context.surface().call(behavior);
          };

          context.uninstall = function (behavior) {
            return context.surface().call(behavior.off);
          };
          /* Copy/Paste */


          var _copyGraph;

          context.copyGraph = function () {
            return _copyGraph;
          };

          var _copyIDs = [];

          context.copyIDs = function (val) {
            if (!arguments.length) return _copyIDs;
            _copyIDs = val;
            _copyGraph = _history.graph();
            return context;
          };

          var _copyLonLat;

          context.copyLonLat = function (val) {
            if (!arguments.length) return _copyLonLat;
            _copyLonLat = val;
            return context;
          };
          /* Background */


          var _background;

          context.background = function () {
            return _background;
          };
          /* Features */


          var _features;

          context.features = function () {
            return _features;
          };

          context.hasHiddenConnections = function (id) {
            var graph = _history.graph();

            var entity = graph.entity(id);
            return _features.hasHiddenConnections(entity, graph);
          };
          /* Photos */


          var _photos;

          context.photos = function () {
            return _photos;
          };
          /* Map */


          var _map;

          context.map = function () {
            return _map;
          };

          context.layers = function () {
            return _map.layers();
          };

          context.surface = function () {
            return _map.surface;
          };

          context.editableDataEnabled = function () {
            return _map.editableDataEnabled();
          };

          context.surfaceRect = function () {
            return _map.surface.node().getBoundingClientRect();
          };

          context.editable = function () {
            // don't allow editing during save
            var mode = context.mode();
            if (!mode || mode.id === 'save') return false;
            return _map.editableDataEnabled();
          };
          /* Debug */


          var _debugFlags = {
            tile: false,
            // tile boundaries
            collision: false,
            // label collision bounding boxes
            imagery: false,
            // imagery bounding polygons
            target: false,
            // touch targets
            downloaded: false // downloaded data from osm

          };

          context.debugFlags = function () {
            return _debugFlags;
          };

          context.getDebug = function (flag) {
            return flag && _debugFlags[flag];
          };

          context.setDebug = function (flag, val) {
            if (arguments.length === 1) val = true;
            _debugFlags[flag] = val;
            dispatch.call('change');
            return context;
          };
          /* Container */


          var _container = select(null);

          context.container = function (val) {
            if (!arguments.length) return _container;
            _container = val;

            _container.classed('ideditor', true);

            return context;
          };

          context.containerNode = function (val) {
            if (!arguments.length) return context.container().node();
            context.container(select(val));
            return context;
          };

          var _embed;

          context.embed = function (val) {
            if (!arguments.length) return _embed;
            _embed = val;
            return context;
          };
          /* Assets */


          var _assetPath = '';

          context.assetPath = function (val) {
            if (!arguments.length) return _assetPath;
            _assetPath = val;
            _mainFileFetcher.assetPath(val);
            return context;
          };

          var _assetMap = {};

          context.assetMap = function (val) {
            if (!arguments.length) return _assetMap;
            _assetMap = val;
            _mainFileFetcher.assetMap(val);
            return context;
          };

          context.asset = function (val) {
            if (/^http(s)?:\/\//i.test(val)) return val;
            var filename = _assetPath + val;
            return _assetMap[filename] || filename;
          };

          context.imagePath = function (val) {
            return context.asset("img/".concat(val));
          };
          /* reset (aka flush) */


          context.reset = context.flush = function () {
            context.debouncedSave.cancel();
            Array.from(_deferred).forEach(function (handle) {
              window.cancelIdleCallback(handle);

              _deferred["delete"](handle);
            });
            Object.values(services).forEach(function (service) {
              if (service && typeof service.reset === 'function') {
                service.reset(context);
              }
            });
            context.changeset = null;

            _validator.reset();

            _features.reset();

            _history.reset();

            _uploader.reset(); // don't leave stale state in the inspector


            context.container().select('.inspector-wrap *').remove();
            return context;
          };
          /* Projections */


          context.projection = geoRawMercator();
          context.curtainProjection = geoRawMercator();
          /* Init */

          context.init = function () {
            instantiateInternal();
            initializeDependents();
            return context; // Load variables and properties. No property of `context` should be accessed
            // until this is complete since load statuses are indeterminate. The order
            // of instantiation shouldn't matter.

            function instantiateInternal() {
              _history = coreHistory(context);
              context.graph = _history.graph;
              context.pauseChangeDispatch = _history.pauseChangeDispatch;
              context.resumeChangeDispatch = _history.resumeChangeDispatch;
              context.perform = withDebouncedSave(_history.perform);
              context.replace = withDebouncedSave(_history.replace);
              context.pop = withDebouncedSave(_history.pop);
              context.overwrite = withDebouncedSave(_history.overwrite);
              context.undo = withDebouncedSave(_history.undo);
              context.redo = withDebouncedSave(_history.redo);
              _validator = coreValidator(context);
              _uploader = coreUploader(context);
              _background = rendererBackground(context);
              _features = rendererFeatures(context);
              _map = rendererMap(context);
              _photos = rendererPhotos(context);
              _ui = uiInit(context);
            } // Set up objects that might need to access properties of `context`. The order
            // might matter if dependents make calls to each other. Be wary of async calls.


            function initializeDependents() {
              if (context.initialHashParams.presets) {
                _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));
              }

              if (context.initialHashParams.locale) {
                _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
              } // kick off some async work


              _mainLocalizer.ensureLoaded();

              _background.ensureLoaded();

              _mainPresetIndex.ensureLoaded();
              Object.values(services).forEach(function (service) {
                if (service && typeof service.init === 'function') {
                  service.init();
                }
              });

              _map.init();

              _validator.init();

              _features.init();

              if (services.maprules && context.initialHashParams.maprules) {
                d3_json(context.initialHashParams.maprules).then(function (mapcss) {
                  services.maprules.init();
                  mapcss.forEach(function (mapcssSelector) {
                    return services.maprules.addRule(mapcssSelector);
                  });
                })["catch"](function () {
                  /* ignore */
                });
              } // if the container isn't available, e.g. when testing, don't load the UI


              if (!context.container().empty()) {
                _ui.ensureLoaded().then(function () {
                  _photos.init();
                });
              }
            }
          };

          return context;
        }

        // NSI contains the most correct tagging for many commonly mapped features.
        // See https://github.com/osmlab/name-suggestion-index  and  https://nsi.guide
        // DATA

        var _nsiStatus = 'loading'; // 'loading', 'ok', 'failed'

        var _nsi = {}; // Sometimes we can upgrade a feature tagged like `building=yes` to a better tag.

        var buildingPreset = {
          'building/commercial': true,
          'building/government': true,
          'building/hotel': true,
          'building/retail': true,
          'building/office': true,
          'building/supermarket': true,
          'building/yes': true
        }; // Exceptions to the namelike regexes.
        // Usually a tag suffix contains a language code like `name:en`, `name:ru`
        // but we want to exclude things like `operator:type`, `name:etymology`, etc..

        var notNames = /:(colou?r|type|forward|backward|left|right|etymology|pronunciation|wikipedia)$/i; // Exceptions to the branchlike regexes

        var notBranches = /(coop|express|wireless|factory|outlet)/i; // PRIVATE FUNCTIONS
        // `setNsiSources()`
        // Adds the sources to iD's filemap so we can start downloading data.
        //

        function setNsiSources() {
          var nsiVersion = packageJSON.devDependencies['name-suggestion-index'];
          var v = vparse(nsiVersion);
          var vMinor = "".concat(v.major, ".").concat(v.minor);
          var sources = {
            'nsi_data': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/nsi.min.json"),
            'nsi_dissolved': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/dissolved.min.json"),
            'nsi_features': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/featureCollection.min.json"),
            'nsi_generics': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/genericWords.min.json"),
            'nsi_presets': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/presets/nsi-id-presets.min.json"),
            'nsi_replacements': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/replacements.min.json"),
            'nsi_trees': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/trees.min.json")
          };
          var fileMap = _mainFileFetcher.fileMap();

          for (var k in sources) {
            fileMap[k] = sources[k];
          }
        } // `loadNsiPresets()`
        //  Returns a Promise fulfilled when the presets have been downloaded and merged into iD.
        //


        function loadNsiPresets() {
          return Promise.all([_mainFileFetcher.get('nsi_presets'), _mainFileFetcher.get('nsi_features')]).then(function (vals) {
            // Add `suggestion=true` to all the nsi presets
            // The preset json schema doesn't include it, but the iD code still uses it
            Object.values(vals[0].presets).forEach(function (preset) {
              return preset.suggestion = true;
            });
            _mainPresetIndex.merge({
              presets: vals[0].presets,
              featureCollection: vals[1]
            });
          });
        } // `loadNsiData()`
        //  Returns a Promise fulfilled when the other data have been downloaded and processed
        //


        function loadNsiData() {
          return Promise.all([_mainFileFetcher.get('nsi_data'), _mainFileFetcher.get('nsi_dissolved'), _mainFileFetcher.get('nsi_replacements'), _mainFileFetcher.get('nsi_trees')]).then(function (vals) {
            _nsi = {
              data: vals[0].nsi,
              // the raw name-suggestion-index data
              dissolved: vals[1].dissolved,
              // list of dissolved items
              replacements: vals[2].replacements,
              // trivial old->new qid replacements
              trees: vals[3].trees,
              // metadata about trees, main tags
              kvt: new Map(),
              // Map (k -> Map (v -> t) )
              qids: new Map(),
              // Map (wd/wp tag values -> qids)
              ids: new Map() // Map (id -> NSI item)

            };
            _nsi.matcher = new Matcher();

            _nsi.matcher.buildMatchIndex(_nsi.data);

            _nsi.matcher.buildLocationIndex(_nsi.data, _mainLocations.loco());

            Object.keys(_nsi.data).forEach(function (tkv) {
              var category = _nsi.data[tkv];
              var parts = tkv.split('/', 3); // tkv = "tree/key/value"

              var t = parts[0];
              var k = parts[1];
              var v = parts[2]; // Build a reverse index of keys -> values -> trees present in the name-suggestion-index
              // Collect primary keys  (e.g. "amenity", "craft", "shop", "man_made", "route", etc)
              // "amenity": {
              //   "restaurant": "brands"
              // }

              var vmap = _nsi.kvt.get(k);

              if (!vmap) {
                vmap = new Map();

                _nsi.kvt.set(k, vmap);
              }

              vmap.set(v, t);
              var tree = _nsi.trees[t]; // e.g. "brands", "operators"

              var mainTag = tree.mainTag; // e.g. "brand:wikidata", "operator:wikidata", etc

              var items = category.items || [];
              items.forEach(function (item) {
                // Remember some useful things for later, cache NSI id -> item
                item.tkv = tkv;
                item.mainTag = mainTag;

                _nsi.ids.set(item.id, item); // Cache Wikidata/Wikipedia values -> qid, for #6416


                var wd = item.tags[mainTag];
                var wp = item.tags[mainTag.replace('wikidata', 'wikipedia')];
                if (wd) _nsi.qids.set(wd, wd);
                if (wp && wd) _nsi.qids.set(wp, wd);
              });
            });
          });
        } // `gatherKVs()`
        // Gather all the k/v pairs that we will run through the NSI matcher.
        // An OSM tags object can contain anything, but only a few tags will be interesting to NSI.
        //
        // This function will return the interesting tag pairs like:
        //   "amenity/restaurant", "man_made/flagpole"
        // and fallbacks like
        //   "amenity/yes"
        // excluding things like
        //   "tiger:reviewed", "surface", "ref", etc.
        //
        // Arguments
        //   `tags`: `Object` containing the feature's OSM tags
        // Returns
        //   `Object` containing kv pairs to test:
        //   {
        //     'primary': Set(),
        //     'alternate': Set()
        //   }
        //


        function gatherKVs(tags) {
          var primary = new Set();
          var alternate = new Set();
          Object.keys(tags).forEach(function (osmkey) {
            var osmvalue = tags[osmkey];
            if (!osmvalue) return; // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184

            if (osmkey === 'route_master') osmkey = 'route';

            var vmap = _nsi.kvt.get(osmkey);

            if (!vmap) return; // not an interesting key

            if (vmap.get(osmvalue)) {
              // Matched a category in NSI
              primary.add("".concat(osmkey, "/").concat(osmvalue)); // interesting key/value
            } else if (osmvalue === 'yes') {
              alternate.add("".concat(osmkey, "/").concat(osmvalue)); // fallback key/yes
            }
          }); // Can we try a generic building fallback match? - See #6122, #7197
          // Only try this if we do a preset match and find nothing else remarkable about that building.
          // For example, a way with `building=yes` + `name=Westfield` may be a Westfield department store.
          // But a way with `building=yes` + `name=Westfield` + `public_transport=station` is a train station for a town named "Westfield"

          var preset = _mainPresetIndex.matchTags(tags, 'area');

          if (buildingPreset[preset.id]) {
            alternate.add('building/yes');
          }

          return {
            primary: primary,
            alternate: alternate
          };
        } // `identifyTree()`
        // NSI has a concept of trees: "brands", "operators", "flags", "transit".
        // The tree determines things like which tags are namelike, and which tags hold important wikidata.
        // This takes an Object of tags and tries to identify what tree to use.
        //
        // Arguments
        //   `tags`: `Object` containing the feature's OSM tags
        // Returns
        //   `string` the name of the tree if known
        //   or 'unknown' if it could match several trees (e.g. amenity/yes)
        //   or null if no match
        //


        function identifyTree(tags) {
          var unknown;
          var t; // Check all tags

          Object.keys(tags).forEach(function (osmkey) {
            if (t) return; // found already

            var osmvalue = tags[osmkey];
            if (!osmvalue) return; // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184

            if (osmkey === 'route_master') osmkey = 'route';

            var vmap = _nsi.kvt.get(osmkey);

            if (!vmap) return; // this key is not in nsi

            if (osmvalue === 'yes') {
              unknown = 'unknown';
            } else {
              t = vmap.get(osmvalue);
            }
          });
          return t || unknown || null;
        } // `gatherNames()`
        // Gather all the namelike values that we will run through the NSI matcher.
        // It will gather values primarily from tags `name`, `name:ru`, `flag:name`
        //  and fallback to alternate tags like `brand`, `brand:ru`, `alt_name`
        //
        // Arguments
        //   `tags`: `Object` containing the feature's OSM tags
        // Returns
        //   `Object` containing namelike values to test:
        //   {
        //     'primary': Set(),
        //     'fallbacks': Set()
        //   }
        //


        function gatherNames(tags) {
          var empty = {
            primary: new Set(),
            alternate: new Set()
          };
          var primary = new Set();
          var alternate = new Set();
          var foundSemi = false;
          var testNameFragments = false;
          var patterns; // Patterns for matching OSM keys that might contain namelike values.
          // These roughly correspond to the "trees" concept in name-suggestion-index,

          var t = identifyTree(tags);
          if (!t) return empty;

          if (t === 'transit') {
            patterns = {
              primary: /^network$/i,
              alternate: /^(operator|operator:\w+|network:\w+|\w+_name|\w+_name:\w+)$/i
            };
          } else if (t === 'flags') {
            patterns = {
              primary: /^(flag:name|flag:name:\w+)$/i,
              alternate: /^(flag|flag:\w+|subject|subject:\w+)$/i // note: no `country`, we special-case it below

            };
          } else if (t === 'brands') {
            testNameFragments = true;
            patterns = {
              primary: /^(name|name:\w+)$/i,
              alternate: /^(brand|brand:\w+|operator|operator:\w+|\w+_name|\w+_name:\w+)/i
            };
          } else if (t === 'operators') {
            testNameFragments = true;
            patterns = {
              primary: /^(name|name:\w+|operator|operator:\w+)$/i,
              alternate: /^(brand|brand:\w+|\w+_name|\w+_name:\w+)/i
            };
          } else {
            // unknown/multiple
            testNameFragments = true;
            patterns = {
              primary: /^(name|name:\w+)$/i,
              alternate: /^(brand|brand:\w+|network|network:\w+|operator|operator:\w+|\w+_name|\w+_name:\w+)/i
            };
          } // Test `name` fragments, longest to shortest, to fit them into a "Name Branch" pattern.
          // e.g. "TUI ReiseCenter - Neuss Innenstadt" -> ["TUI", "ReiseCenter", "Neuss", "Innenstadt"]


          if (tags.name && testNameFragments) {
            var nameParts = tags.name.split(/[\s\-\/,.]/);

            for (var split = nameParts.length; split > 0; split--) {
              var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"

              primary.add(name);
            }
          } // Check all tags


          Object.keys(tags).forEach(function (osmkey) {
            var osmvalue = tags[osmkey];
            if (!osmvalue) return;

            if (isNamelike(osmkey, 'primary')) {
              if (/;/.test(osmvalue)) {
                foundSemi = true;
              } else {
                primary.add(osmvalue);
                alternate["delete"](osmvalue);
              }
            } else if (!primary.has(osmvalue) && isNamelike(osmkey, 'alternate')) {
              if (/;/.test(osmvalue)) {
                foundSemi = true;
              } else {
                alternate.add(osmvalue);
              }
            }
          }); // For flags only, fallback to `country` tag only if no other namelike values were found.
          // See https://github.com/openstreetmap/iD/pull/8305#issuecomment-769174070

          if (tags.man_made === 'flagpole' && !primary.size && !alternate.size && !!tags.country) {
            var osmvalue = tags.country;

            if (/;/.test(osmvalue)) {
              foundSemi = true;
            } else {
              alternate.add(osmvalue);
            }
          } // If any namelike value contained a semicolon, return empty set and don't try matching anything.


          if (foundSemi) {
            return empty;
          } else {
            return {
              primary: primary,
              alternate: alternate
            };
          }

          function isNamelike(osmkey, which) {
            if (osmkey === 'old_name') return false;
            return patterns[which].test(osmkey) && !notNames.test(osmkey);
          }
        } // `gatherTuples()`
        // Generate all combinations of [key,value,name] that we want to test.
        // This prioritizes them so that the primary name and k/v pairs go first
        //
        // Arguments
        //   `tryKVs`: `Object` containing primary and alternate k/v pairs to test
        //   `tryNames`: `Object` containing primary and alternate names to test
        // Returns
        //   `Array`: tuple objects ordered by priority
        //


        function gatherTuples(tryKVs, tryNames) {
          var tuples = [];
          ['primary', 'alternate'].forEach(function (whichName) {
            // test names longest to shortest
            var arr = Array.from(tryNames[whichName]).sort(function (a, b) {
              return b.length - a.length;
            });
            arr.forEach(function (n) {
              ['primary', 'alternate'].forEach(function (whichKV) {
                tryKVs[whichKV].forEach(function (kv) {
                  var parts = kv.split('/', 2);
                  var k = parts[0];
                  var v = parts[1];
                  tuples.push({
                    k: k,
                    v: v,
                    n: n
                  });
                });
              });
            });
          });
          return tuples;
        } // `_upgradeTags()`
        // Try to match a feature to a canonical record in name-suggestion-index
        // and upgrade the tags to match.
        //
        // Arguments
        //   `tags`: `Object` containing the feature's OSM tags
        //   `loc`: Location where this feature exists, as a [lon, lat]
        // Returns
        //   `Object`: The tags the the feature should have, or `null` if no changes needed
        //


        function _upgradeTags(tags, loc) {
          var newTags = Object.assign({}, tags); // shallow copy

          var changed = false; // Before anything, perform trivial Wikipedia/Wikidata replacements

          Object.keys(newTags).forEach(function (osmkey) {
            var matchTag = osmkey.match(/^(\w+:)?wikidata$/);

            if (matchTag) {
              // Look at '*:wikidata' tags
              var prefix = matchTag[1] || '';
              var wd = newTags[osmkey];
              var replace = _nsi.replacements[wd]; // If it matches a QID in the replacement list...

              if (replace && replace.wikidata !== undefined) {
                // replace or delete `*:wikidata` tag
                changed = true;

                if (replace.wikidata) {
                  newTags[osmkey] = replace.wikidata;
                } else {
                  delete newTags[osmkey];
                }
              }

              if (replace && replace.wikipedia !== undefined) {
                // replace or delete `*:wikipedia` tag
                changed = true;
                var wpkey = "".concat(prefix, "wikipedia");

                if (replace.wikipedia) {
                  newTags[wpkey] = replace.wikipedia;
                } else {
                  delete newTags[wpkey];
                }
              }
            }
          }); // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184

          var isRouteMaster = tags.type === 'route_master'; // Gather key/value tag pairs to try to match

          var tryKVs = gatherKVs(tags);
          if (!tryKVs.primary.size && !tryKVs.alternate.size) return changed ? newTags : null; // Gather namelike tag values to try to match

          var tryNames = gatherNames(tags); // Do `wikidata=*` or `wikipedia=*` tags identify this entity as a chain? - See #6416
          // If so, these tags can be swapped to e.g. `brand:wikidata`/`brand:wikipedia`.

          var foundQID = _nsi.qids.get(tags.wikidata) || _nsi.qids.get(tags.wikipedia);

          if (foundQID) tryNames.primary.add(foundQID); // matcher will recognize the Wikidata QID as name too

          if (!tryNames.primary.size && !tryNames.alternate.size) return changed ? newTags : null; // Order the [key,value,name] tuples - test primary before alternate

          var tuples = gatherTuples(tryKVs, tryNames);

          var _loop = function _loop(i) {
            var tuple = tuples[i];

            var hits = _nsi.matcher.match(tuple.k, tuple.v, tuple.n, loc); // Attempt to match an item in NSI


            if (!hits || !hits.length) return "continue"; // no match, try next tuple

            if (hits[0].match !== 'primary' && hits[0].match !== 'alternate') return "break"; // a generic match, stop looking
            // A match may contain multiple results, the first one is likely the best one for this location
            // e.g. `['pfk-a54c14', 'kfc-1ff19c', 'kfc-658eea']`

            var itemID = void 0,
                item = void 0;

            for (var j = 0; j < hits.length; j++) {
              var hit = hits[j];
              itemID = hit.itemID;
              if (_nsi.dissolved[itemID]) continue; // Don't upgrade to a dissolved item

              item = _nsi.ids.get(itemID);
              if (!item) continue;
              var mainTag = item.mainTag; // e.g. `brand:wikidata`

              var itemQID = item.tags[mainTag]; // e.g. `brand:wikidata` qid

              var notQID = newTags["not:".concat(mainTag)]; // e.g. `not:brand:wikidata` qid

              if ( // Exceptions, skip this hit
              !itemQID || itemQID === notQID || // No `*:wikidata` or matched a `not:*:wikidata`
              newTags.office && !item.tags.office // feature may be a corporate office for a brand? - #6416
              ) {
                  item = null;
                  continue; // continue looking
                } else {
                  break; // use `item`
                }
            } // Can't use any of these hits, try next tuple..


            if (!item) return "continue"; // At this point we have matched a canonical item and can suggest tag upgrades..

            var tkv = item.tkv;
            var parts = tkv.split('/', 3); // tkv = "tree/key/value"

            var k = parts[1];
            var v = parts[2];
            var category = _nsi.data[tkv];
            var properties = category.properties || {}; // Preserve some tags that we specifically don't want NSI to overwrite. ('^name', sometimes)

            var preserveTags = item.preserveTags || properties.preserveTags || []; // These tags can be toplevel tags -or- attributes - so we generally want to preserve existing values - #8615
            // We'll only _replace_ the tag value if this tag is the toplevel/defining tag for the matched item (`k`)

            ['building', 'emergency', 'internet_access', 'takeaway'].forEach(function (osmkey) {
              if (k !== osmkey) preserveTags.push("^".concat(osmkey, "$"));
            });
            var regexes = preserveTags.map(function (s) {
              return new RegExp(s, 'i');
            });
            var keepTags = {};
            Object.keys(newTags).forEach(function (osmkey) {
              if (regexes.some(function (regex) {
                return regex.test(osmkey);
              })) {
                keepTags[osmkey] = newTags[osmkey];
              }
            }); // Remove any primary tags ("amenity", "craft", "shop", "man_made", "route", etc) that have a
            // value like `amenity=yes` or `shop=yes` (exceptions have already been added to `keepTags` above)

            _nsi.kvt.forEach(function (vmap, k) {
              if (newTags[k] === 'yes') delete newTags[k];
            }); // Replace mistagged `wikidata`/`wikipedia` with e.g. `brand:wikidata`/`brand:wikipedia`


            if (foundQID) {
              delete newTags.wikipedia;
              delete newTags.wikidata;
            } // Do the tag upgrade


            Object.assign(newTags, item.tags, keepTags); // Swap `route` back to `route_master` - name-suggestion-index#5184

            if (isRouteMaster) {
              newTags.route_master = newTags.route;
              delete newTags.route;
            } // Special `branch` splitting rules - IF..
            // - NSI is suggesting to replace `name`, AND
            // - `branch` doesn't already contain something, AND
            // - original name has not moved to an alternate name (e.g. "Dunkin' Donuts" -> "Dunkin'"), AND
            // - original name is "some name" + "some stuff", THEN
            // consider splitting `name` into `name`/`branch`..


            var origName = tags.name;
            var newName = newTags.name;

            if (newName && origName && newName !== origName && !newTags.branch) {
              var newNames = gatherNames(newTags);
              var newSet = new Set([].concat(_toConsumableArray(newNames.primary), _toConsumableArray(newNames.alternate)));
              var isMoved = newSet.has(origName); // another tag holds the original name now

              if (!isMoved) {
                // Test name fragments, longest to shortest, to fit them into a "Name Branch" pattern.
                // e.g. "TUI ReiseCenter - Neuss Innenstadt" -> ["TUI", "ReiseCenter", "Neuss", "Innenstadt"]
                var nameParts = origName.split(/[\s\-\/,.]/);

                for (var split = nameParts.length; split > 0; split--) {
                  var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"

                  var branch = nameParts.slice(split).join(' '); // e.g. "Neuss Innenstadt"

                  var nameHits = _nsi.matcher.match(k, v, name, loc);

                  if (!nameHits || !nameHits.length) continue; // no match, try next name fragment

                  if (nameHits.some(function (hit) {
                    return hit.itemID === itemID;
                  })) {
                    // matched the name fragment to the same itemID above
                    if (branch) {
                      if (notBranches.test(branch)) {
                        // "branch" was detected but is noise ("factory outlet", etc)
                        newTags.name = origName; // Leave `name` alone, this part of the name may be significant..
                      } else {
                        var branchHits = _nsi.matcher.match(k, v, branch, loc);

                        if (branchHits && branchHits.length) {
                          // if "branch" matched something else in NSI..
                          if (branchHits[0].match === 'primary' || branchHits[0].match === 'alternate') {
                            // if another brand! (e.g. "KFC - Taco Bell"?)
                            return {
                              v: null
                            }; //   bail out - can't suggest tags in this case
                          } // else a generic (e.g. "gas", "cafe") - ignore

                        } else {
                          // "branch" is not noise and not something in NSI
                          newTags.branch = branch; // Stick it in the `branch` tag..
                        }
                      }
                    }

                    break;
                  }
                }
              }
            }

            return {
              v: newTags
            };
          };

          for (var i = 0; i < tuples.length; i++) {
            var _ret = _loop(i);

            if (_ret === "continue") continue;
            if (_ret === "break") break;
            if (_typeof(_ret) === "object") return _ret.v;
          }

          return changed ? newTags : null;
        } // `_isGenericName()`
        // Is the `name` tag generic?
        //
        // Arguments
        //   `tags`: `Object` containing the feature's OSM tags
        // Returns
        //   `true` if it is generic, `false` if not
        //


        function _isGenericName(tags) {
          var n = tags.name;
          if (!n) return false; // tryNames just contains the `name` tag value and nothing else

          var tryNames = {
            primary: new Set([n]),
            alternate: new Set()
          }; // Gather key/value tag pairs to try to match

          var tryKVs = gatherKVs(tags);
          if (!tryKVs.primary.size && !tryKVs.alternate.size) return false; // Order the [key,value,name] tuples - test primary before alternate

          var tuples = gatherTuples(tryKVs, tryNames);

          for (var i = 0; i < tuples.length; i++) {
            var tuple = tuples[i];

            var hits = _nsi.matcher.match(tuple.k, tuple.v, tuple.n); // Attempt to match an item in NSI
            // If we get a `excludeGeneric` hit, this is a generic name.


            if (hits && hits.length && hits[0].match === 'excludeGeneric') return true;
          }

          return false;
        } // PUBLIC INTERFACE


        var serviceNsi = {
          // `init()`
          // On init, start preparing the name-suggestion-index
          //
          init: function init() {
            // Note: service.init is called immediately after the presetManager has started loading its data.
            // We expect to chain onto an unfulfilled promise here.
            setNsiSources();
            _mainPresetIndex.ensureLoaded().then(function () {
              return loadNsiPresets();
            }).then(function () {
              return delay(100);
            }) // wait briefly for locationSets to enter the locationManager queue
            .then(function () {
              return _mainLocations.mergeLocationSets([]);
            }) // wait for locationSets to resolve
            .then(function () {
              return loadNsiData();
            }).then(function () {
              return _nsiStatus = 'ok';
            })["catch"](function () {
              return _nsiStatus = 'failed';
            });

            function delay(msec) {
              return new Promise(function (resolve) {
                window.setTimeout(resolve, msec);
              });
            }
          },
          // `reset()`
          // Reset is called when user saves data to OSM (does nothing here)
          //
          reset: function reset() {},
          // `status()`
          // To let other code know how it's going...
          //
          // Returns
          //   `String`: 'loading', 'ok', 'failed'
          //
          status: function status() {
            return _nsiStatus;
          },
          // `isGenericName()`
          // Is the `name` tag generic?
          //
          // Arguments
          //   `tags`: `Object` containing the feature's OSM tags
          // Returns
          //   `true` if it is generic, `false` if not
          //
          isGenericName: function isGenericName(tags) {
            return _isGenericName(tags);
          },
          // `upgradeTags()`
          // Suggest tag upgrades.
          // This function will not modify the input tags, it makes a copy.
          //
          // Arguments
          //   `tags`: `Object` containing the feature's OSM tags
          //   `loc`: Location where this feature exists, as a [lon, lat]
          // Returns
          //   `Object`: The tags the the feature should have, or `null` if no change
          //
          upgradeTags: function upgradeTags(tags, loc) {
            return _upgradeTags(tags, loc);
          },
          // `cache()`
          // Direct access to the NSI cache, useful for testing or breaking things
          //
          // Returns
          //   `Object`: the internal NSI cache
          //
          cache: function cache() {
            return _nsi;
          }
        };

        var apibase$1 = 'https://openstreetcam.org';
        var maxResults$1 = 1000;
        var tileZoom$1 = 14;
        var tiler$3 = utilTiler().zoomExtent([tileZoom$1, tileZoom$1]).skipNullIsland(true);
        var dispatch$3 = dispatch$8('loadedImages');
        var imgZoom = d3_zoom().extent([[0, 0], [320, 240]]).translateExtent([[0, 0], [320, 240]]).scaleExtent([1, 15]);

        var _oscCache;

        var _oscSelectedImage;

        var _loadViewerPromise$1;

        function abortRequest$3(controller) {
          controller.abort();
        }

        function maxPageAtZoom(z) {
          if (z < 15) return 2;
          if (z === 15) return 5;
          if (z === 16) return 10;
          if (z === 17) return 20;
          if (z === 18) return 40;
          if (z > 18) return 80;
        }

        function loadTiles$1(which, url, projection) {
          var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
          var tiles = tiler$3.getTiles(projection); // abort inflight requests that are no longer needed

          var cache = _oscCache[which];
          Object.keys(cache.inflight).forEach(function (k) {
            var wanted = tiles.find(function (tile) {
              return k.indexOf(tile.id + ',') === 0;
            });

            if (!wanted) {
              abortRequest$3(cache.inflight[k]);
              delete cache.inflight[k];
            }
          });
          tiles.forEach(function (tile) {
            loadNextTilePage$1(which, currZoom, url, tile);
          });
        }

        function loadNextTilePage$1(which, currZoom, url, tile) {
          var cache = _oscCache[which];
          var bbox = tile.extent.bbox();
          var maxPages = maxPageAtZoom(currZoom);
          var nextPage = cache.nextPage[tile.id] || 1;
          var params = utilQsString({
            ipp: maxResults$1,
            page: nextPage,
            // client_id: clientId,
            bbTopLeft: [bbox.maxY, bbox.minX].join(','),
            bbBottomRight: [bbox.minY, bbox.maxX].join(',')
          }, true);
          if (nextPage > maxPages) return;
          var id = tile.id + ',' + String(nextPage);
          if (cache.loaded[id] || cache.inflight[id]) return;
          var controller = new AbortController();
          cache.inflight[id] = controller;
          var options = {
            method: 'POST',
            signal: controller.signal,
            body: params,
            headers: {
              'Content-Type': 'application/x-www-form-urlencoded'
            }
          };
          d3_json(url, options).then(function (data) {
            cache.loaded[id] = true;
            delete cache.inflight[id];

            if (!data || !data.currentPageItems || !data.currentPageItems.length) {
              throw new Error('No Data');
            }

            var features = data.currentPageItems.map(function (item) {
              var loc = [+item.lng, +item.lat];
              var d;

              if (which === 'images') {
                d = {
                  loc: loc,
                  key: item.id,
                  ca: +item.heading,
                  captured_at: item.shot_date || item.date_added,
                  captured_by: item.username,
                  imagePath: item.lth_name,
                  sequence_id: item.sequence_id,
                  sequence_index: +item.sequence_index
                }; // cache sequence info

                var seq = _oscCache.sequences[d.sequence_id];

                if (!seq) {
                  seq = {
                    rotation: 0,
                    images: []
                  };
                  _oscCache.sequences[d.sequence_id] = seq;
                }

                seq.images[d.sequence_index] = d;
                _oscCache.images.forImageKey[d.key] = d; // cache imageKey -> image
              }

              return {
                minX: loc[0],
                minY: loc[1],
                maxX: loc[0],
                maxY: loc[1],
                data: d
              };
            });
            cache.rtree.load(features);

            if (data.currentPageItems.length === maxResults$1) {
              // more pages to load
              cache.nextPage[tile.id] = nextPage + 1;
              loadNextTilePage$1(which, currZoom, url, tile);
            } else {
              cache.nextPage[tile.id] = Infinity; // no more pages to load
            }

            if (which === 'images') {
              dispatch$3.call('loadedImages');
            }
          })["catch"](function () {
            cache.loaded[id] = true;
            delete cache.inflight[id];
          });
        } // partition viewport into higher zoom tiles


        function partitionViewport$1(projection) {
          var z = geoScaleToZoom(projection.scale());
          var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5

          var tiler = utilTiler().zoomExtent([z2, z2]);
          return tiler.getTiles(projection).map(function (tile) {
            return tile.extent;
          });
        } // no more than `limit` results per partition.


        function searchLimited$1(limit, projection, rtree) {
          limit = limit || 5;
          return partitionViewport$1(projection).reduce(function (result, extent) {
            var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
              return d.data;
            });
            return found.length ? result.concat(found) : result;
          }, []);
        }

        var serviceOpenstreetcam = {
          init: function init() {
            if (!_oscCache) {
              this.reset();
            }

            this.event = utilRebind(this, dispatch$3, 'on');
          },
          reset: function reset() {
            if (_oscCache) {
              Object.values(_oscCache.images.inflight).forEach(abortRequest$3);
            }

            _oscCache = {
              images: {
                inflight: {},
                loaded: {},
                nextPage: {},
                rtree: new RBush(),
                forImageKey: {}
              },
              sequences: {}
            };
            _oscSelectedImage = null;
          },
          images: function images(projection) {
            var limit = 5;
            return searchLimited$1(limit, projection, _oscCache.images.rtree);
          },
          sequences: function sequences(projection) {
            var viewport = projection.clipExtent();
            var min = [viewport[0][0], viewport[1][1]];
            var max = [viewport[1][0], viewport[0][1]];
            var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
            var sequenceKeys = {}; // all sequences for images in viewport

            _oscCache.images.rtree.search(bbox).forEach(function (d) {
              sequenceKeys[d.data.sequence_id] = true;
            }); // make linestrings from those sequences


            var lineStrings = [];
            Object.keys(sequenceKeys).forEach(function (sequenceKey) {
              var seq = _oscCache.sequences[sequenceKey];
              var images = seq && seq.images;

              if (images) {
                lineStrings.push({
                  type: 'LineString',
                  coordinates: images.map(function (d) {
                    return d.loc;
                  }).filter(Boolean),
                  properties: {
                    captured_at: images[0] ? images[0].captured_at : null,
                    captured_by: images[0] ? images[0].captured_by : null,
                    key: sequenceKey
                  }
                });
              }
            });
            return lineStrings;
          },
          cachedImage: function cachedImage(imageKey) {
            return _oscCache.images.forImageKey[imageKey];
          },
          loadImages: function loadImages(projection) {
            var url = apibase$1 + '/1.0/list/nearby-photos/';
            loadTiles$1('images', url, projection);
          },
          ensureViewerLoaded: function ensureViewerLoaded(context) {
            if (_loadViewerPromise$1) return _loadViewerPromise$1; // add osc-wrapper

            var wrap = context.container().select('.photoviewer').selectAll('.osc-wrapper').data([0]);
            var that = this;
            var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper osc-wrapper').classed('hide', true).call(imgZoom.on('zoom', zoomPan)).on('dblclick.zoom', null);
            wrapEnter.append('div').attr('class', 'photo-attribution fillD');
            var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
            controlsEnter.append('button').on('click.back', step(-1)).html('◄');
            controlsEnter.append('button').on('click.rotate-ccw', rotate(-90)).html('⤿');
            controlsEnter.append('button').on('click.rotate-cw', rotate(90)).html('⤾');
            controlsEnter.append('button').on('click.forward', step(1)).html('►');
            wrapEnter.append('div').attr('class', 'osc-image-wrap'); // Register viewer resize handler

            context.ui().photoviewer.on('resize.openstreetcam', function (dimensions) {
              imgZoom = d3_zoom().extent([[0, 0], dimensions]).translateExtent([[0, 0], dimensions]).scaleExtent([1, 15]).on('zoom', zoomPan);
            });

            function zoomPan(d3_event) {
              var t = d3_event.transform;
              context.container().select('.photoviewer .osc-image-wrap').call(utilSetTransform, t.x, t.y, t.k);
            }

            function rotate(deg) {
              return function () {
                if (!_oscSelectedImage) return;
                var sequenceKey = _oscSelectedImage.sequence_id;
                var sequence = _oscCache.sequences[sequenceKey];
                if (!sequence) return;
                var r = sequence.rotation || 0;
                r += deg;
                if (r > 180) r -= 360;
                if (r < -180) r += 360;
                sequence.rotation = r;
                var wrap = context.container().select('.photoviewer .osc-wrapper');
                wrap.transition().duration(100).call(imgZoom.transform, identity$2);
                wrap.selectAll('.osc-image').transition().duration(100).style('transform', 'rotate(' + r + 'deg)');
              };
            }

            function step(stepBy) {
              return function () {
                if (!_oscSelectedImage) return;
                var sequenceKey = _oscSelectedImage.sequence_id;
                var sequence = _oscCache.sequences[sequenceKey];
                if (!sequence) return;
                var nextIndex = _oscSelectedImage.sequence_index + stepBy;
                var nextImage = sequence.images[nextIndex];
                if (!nextImage) return;
                context.map().centerEase(nextImage.loc);
                that.selectImage(context, nextImage.key);
              };
            } // don't need any async loading so resolve immediately


            _loadViewerPromise$1 = Promise.resolve();
            return _loadViewerPromise$1;
          },
          showViewer: function showViewer(context) {
            var viewer = context.container().select('.photoviewer').classed('hide', false);
            var isHidden = viewer.selectAll('.photo-wrapper.osc-wrapper.hide').size();

            if (isHidden) {
              viewer.selectAll('.photo-wrapper:not(.osc-wrapper)').classed('hide', true);
              viewer.selectAll('.photo-wrapper.osc-wrapper').classed('hide', false);
            }

            return this;
          },
          hideViewer: function hideViewer(context) {
            _oscSelectedImage = null;
            this.updateUrlImage(null);
            var viewer = context.container().select('.photoviewer');
            if (!viewer.empty()) viewer.datum(null);
            viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
            context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
            return this.setStyles(context, null, true);
          },
          selectImage: function selectImage(context, imageKey) {
            var d = this.cachedImage(imageKey);
            _oscSelectedImage = d;
            this.updateUrlImage(imageKey);
            var viewer = context.container().select('.photoviewer');
            if (!viewer.empty()) viewer.datum(d);
            this.setStyles(context, null, true);
            context.container().selectAll('.icon-sign').classed('currentView', false);
            if (!d) return this;
            var wrap = context.container().select('.photoviewer .osc-wrapper');
            var imageWrap = wrap.selectAll('.osc-image-wrap');
            var attribution = wrap.selectAll('.photo-attribution').html('');
            wrap.transition().duration(100).call(imgZoom.transform, identity$2);
            imageWrap.selectAll('.osc-image').remove();

            if (d) {
              var sequence = _oscCache.sequences[d.sequence_id];
              var r = sequence && sequence.rotation || 0;
              imageWrap.append('img').attr('class', 'osc-image').attr('src', apibase$1 + '/' + d.imagePath).style('transform', 'rotate(' + r + 'deg)');

              if (d.captured_by) {
                attribution.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://openstreetcam.org/user/' + encodeURIComponent(d.captured_by)).html('@' + d.captured_by);
                attribution.append('span').html('|');
              }

              if (d.captured_at) {
                attribution.append('span').attr('class', 'captured_at').html(localeDateString(d.captured_at));
                attribution.append('span').html('|');
              }

              attribution.append('a').attr('class', 'image-link').attr('target', '_blank').attr('href', 'https://openstreetcam.org/details/' + d.sequence_id + '/' + d.sequence_index).html('openstreetcam.org');
            }

            return this;

            function localeDateString(s) {
              if (!s) return null;
              var options = {
                day: 'numeric',
                month: 'short',
                year: 'numeric'
              };
              var d = new Date(s);
              if (isNaN(d.getTime())) return null;
              return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
            }
          },
          getSelectedImage: function getSelectedImage() {
            return _oscSelectedImage;
          },
          getSequenceKeyForImage: function getSequenceKeyForImage(d) {
            return d && d.sequence_id;
          },
          // Updates the currently highlighted sequence and selected bubble.
          // Reset is only necessary when interacting with the viewport because
          // this implicitly changes the currently selected bubble/sequence
          setStyles: function setStyles(context, hovered, reset) {
            if (reset) {
              // reset all layers
              context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false).classed('currentView', false);
              context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
            }

            var hoveredImageKey = hovered && hovered.key;
            var hoveredSequenceKey = this.getSequenceKeyForImage(hovered);
            var hoveredSequence = hoveredSequenceKey && _oscCache.sequences[hoveredSequenceKey];
            var hoveredImageKeys = hoveredSequence && hoveredSequence.images.map(function (d) {
              return d.key;
            }) || [];
            var viewer = context.container().select('.photoviewer');
            var selected = viewer.empty() ? undefined : viewer.datum();
            var selectedImageKey = selected && selected.key;
            var selectedSequenceKey = this.getSequenceKeyForImage(selected);
            var selectedSequence = selectedSequenceKey && _oscCache.sequences[selectedSequenceKey];
            var selectedImageKeys = selectedSequence && selectedSequence.images.map(function (d) {
              return d.key;
            }) || []; // highlight sibling viewfields on either the selected or the hovered sequences

            var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
            context.container().selectAll('.layer-openstreetcam .viewfield-group').classed('highlighted', function (d) {
              return highlightedImageKeys.indexOf(d.key) !== -1;
            }).classed('hovered', function (d) {
              return d.key === hoveredImageKey;
            }).classed('currentView', function (d) {
              return d.key === selectedImageKey;
            });
            context.container().selectAll('.layer-openstreetcam .sequence').classed('highlighted', function (d) {
              return d.properties.key === hoveredSequenceKey;
            }).classed('currentView', function (d) {
              return d.properties.key === selectedSequenceKey;
            }); // update viewfields if needed

            context.container().selectAll('.layer-openstreetcam .viewfield-group .viewfield').attr('d', viewfieldPath);

            function viewfieldPath() {
              var d = this.parentNode.__data__;

              if (d.pano && d.key !== selectedImageKey) {
                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
              } else {
                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
              }
            }

            return this;
          },
          updateUrlImage: function updateUrlImage(imageKey) {
            if (!window.mocha) {
              var hash = utilStringQs(window.location.hash);

              if (imageKey) {
                hash.photo = 'openstreetcam/' + imageKey;
              } else {
                delete hash.photo;
              }

              window.location.replace('#' + utilQsString(hash, true));
            }
          },
          cache: function cache() {
            return _oscCache;
          }
        };

        var hashes = createCommonjsModule(function (module, exports) {
          (function () {
            var Hashes;

            function utf8Encode(str) {
              var x,
                  y,
                  output = '',
                  i = -1,
                  l;

              if (str && str.length) {
                l = str.length;

                while ((i += 1) < l) {
                  /* Decode utf-16 surrogate pairs */
                  x = str.charCodeAt(i);
                  y = i + 1 < l ? str.charCodeAt(i + 1) : 0;

                  if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
                    x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
                    i += 1;
                  }
                  /* Encode output as utf-8 */


                  if (x <= 0x7F) {
                    output += String.fromCharCode(x);
                  } else if (x <= 0x7FF) {
                    output += String.fromCharCode(0xC0 | x >>> 6 & 0x1F, 0x80 | x & 0x3F);
                  } else if (x <= 0xFFFF) {
                    output += String.fromCharCode(0xE0 | x >>> 12 & 0x0F, 0x80 | x >>> 6 & 0x3F, 0x80 | x & 0x3F);
                  } else if (x <= 0x1FFFFF) {
                    output += String.fromCharCode(0xF0 | x >>> 18 & 0x07, 0x80 | x >>> 12 & 0x3F, 0x80 | x >>> 6 & 0x3F, 0x80 | x & 0x3F);
                  }
                }
              }

              return output;
            }

            function utf8Decode(str) {
              var i,
                  ac,
                  c1,
                  c2,
                  c3,
                  arr = [],
                  l;
              i = ac = c1 = c2 = c3 = 0;

              if (str && str.length) {
                l = str.length;
                str += '';

                while (i < l) {
                  c1 = str.charCodeAt(i);
                  ac += 1;

                  if (c1 < 128) {
                    arr[ac] = String.fromCharCode(c1);
                    i += 1;
                  } else if (c1 > 191 && c1 < 224) {
                    c2 = str.charCodeAt(i + 1);
                    arr[ac] = String.fromCharCode((c1 & 31) << 6 | c2 & 63);
                    i += 2;
                  } else {
                    c2 = str.charCodeAt(i + 1);
                    c3 = str.charCodeAt(i + 2);
                    arr[ac] = String.fromCharCode((c1 & 15) << 12 | (c2 & 63) << 6 | c3 & 63);
                    i += 3;
                  }
                }
              }

              return arr.join('');
            }
            /**
             * Add integers, wrapping at 2^32. This uses 16-bit operations internally
             * to work around bugs in some JS interpreters.
             */


            function safe_add(x, y) {
              var lsw = (x & 0xFFFF) + (y & 0xFFFF),
                  msw = (x >> 16) + (y >> 16) + (lsw >> 16);
              return msw << 16 | lsw & 0xFFFF;
            }
            /**
             * Bitwise rotate a 32-bit number to the left.
             */


            function bit_rol(num, cnt) {
              return num << cnt | num >>> 32 - cnt;
            }
            /**
             * Convert a raw string to a hex string
             */


            function rstr2hex(input, hexcase) {
              var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
                  output = '',
                  x,
                  i = 0,
                  l = input.length;

              for (; i < l; i += 1) {
                x = input.charCodeAt(i);
                output += hex_tab.charAt(x >>> 4 & 0x0F) + hex_tab.charAt(x & 0x0F);
              }

              return output;
            }
            /**
             * Convert an array of big-endian words to a string
             */


            function binb2rstr(input) {
              var i,
                  l = input.length * 32,
                  output = '';

              for (i = 0; i < l; i += 8) {
                output += String.fromCharCode(input[i >> 5] >>> 24 - i % 32 & 0xFF);
              }

              return output;
            }
            /**
             * Convert an array of little-endian words to a string
             */


            function binl2rstr(input) {
              var i,
                  l = input.length * 32,
                  output = '';

              for (i = 0; i < l; i += 8) {
                output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
              }

              return output;
            }
            /**
             * Convert a raw string to an array of little-endian words
             * Characters >255 have their high-byte silently ignored.
             */


            function rstr2binl(input) {
              var i,
                  l = input.length * 8,
                  output = Array(input.length >> 2),
                  lo = output.length;

              for (i = 0; i < lo; i += 1) {
                output[i] = 0;
              }

              for (i = 0; i < l; i += 8) {
                output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << i % 32;
              }

              return output;
            }
            /**
             * Convert a raw string to an array of big-endian words
             * Characters >255 have their high-byte silently ignored.
             */


            function rstr2binb(input) {
              var i,
                  l = input.length * 8,
                  output = Array(input.length >> 2),
                  lo = output.length;

              for (i = 0; i < lo; i += 1) {
                output[i] = 0;
              }

              for (i = 0; i < l; i += 8) {
                output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << 24 - i % 32;
              }

              return output;
            }
            /**
             * Convert a raw string to an arbitrary string encoding
             */


            function rstr2any(input, encoding) {
              var divisor = encoding.length,
                  remainders = Array(),
                  i,
                  q,
                  x,
                  ld,
                  quotient,
                  dividend,
                  output,
                  full_length;
              /* Convert to an array of 16-bit big-endian values, forming the dividend */

              dividend = Array(Math.ceil(input.length / 2));
              ld = dividend.length;

              for (i = 0; i < ld; i += 1) {
                dividend[i] = input.charCodeAt(i * 2) << 8 | input.charCodeAt(i * 2 + 1);
              }
              /**
               * Repeatedly perform a long division. The binary array forms the dividend,
               * the length of the encoding is the divisor. Once computed, the quotient
               * forms the dividend for the next step. We stop when the dividend is zerHashes.
               * All remainders are stored for later use.
               */


              while (dividend.length > 0) {
                quotient = Array();
                x = 0;

                for (i = 0; i < dividend.length; i += 1) {
                  x = (x << 16) + dividend[i];
                  q = Math.floor(x / divisor);
                  x -= q * divisor;

                  if (quotient.length > 0 || q > 0) {
                    quotient[quotient.length] = q;
                  }
                }

                remainders[remainders.length] = x;
                dividend = quotient;
              }
              /* Convert the remainders to the output string */


              output = '';

              for (i = remainders.length - 1; i >= 0; i--) {
                output += encoding.charAt(remainders[i]);
              }
              /* Append leading zero equivalents */


              full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));

              for (i = output.length; i < full_length; i += 1) {
                output = encoding[0] + output;
              }

              return output;
            }
            /**
             * Convert a raw string to a base-64 string
             */


            function rstr2b64(input, b64pad) {
              var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
                  output = '',
                  len = input.length,
                  i,
                  j,
                  triplet;
              b64pad = b64pad || '=';

              for (i = 0; i < len; i += 3) {
                triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);

                for (j = 0; j < 4; j += 1) {
                  if (i * 8 + j * 6 > input.length * 8) {
                    output += b64pad;
                  } else {
                    output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
                  }
                }
              }

              return output;
            }

            Hashes = {
              /**
               * @property {String} version
               * @readonly
               */
              VERSION: '1.0.6',

              /**
               * @member Hashes
               * @class Base64
               * @constructor
               */
              Base64: function Base64() {
                // private properties
                var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
                    pad = '=',
                    // URL encoding support @todo
                utf8 = true; // by default enable UTF-8 support encoding
                // public method for encoding

                this.encode = function (input) {
                  var i,
                      j,
                      triplet,
                      output = '',
                      len = input.length;
                  pad = pad || '=';
                  input = utf8 ? utf8Encode(input) : input;

                  for (i = 0; i < len; i += 3) {
                    triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);

                    for (j = 0; j < 4; j += 1) {
                      if (i * 8 + j * 6 > len * 8) {
                        output += pad;
                      } else {
                        output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
                      }
                    }
                  }

                  return output;
                }; // public method for decoding


                this.decode = function (input) {
                  // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
                  var i,
                      o1,
                      o2,
                      o3,
                      h1,
                      h2,
                      h3,
                      h4,
                      bits,
                      ac,
                      dec = '',
                      arr = [];

                  if (!input) {
                    return input;
                  }

                  i = ac = 0;
                  input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
                  //input += '';

                  do {
                    // unpack four hexets into three octets using index points in b64
                    h1 = tab.indexOf(input.charAt(i += 1));
                    h2 = tab.indexOf(input.charAt(i += 1));
                    h3 = tab.indexOf(input.charAt(i += 1));
                    h4 = tab.indexOf(input.charAt(i += 1));
                    bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
                    o1 = bits >> 16 & 0xff;
                    o2 = bits >> 8 & 0xff;
                    o3 = bits & 0xff;
                    ac += 1;

                    if (h3 === 64) {
                      arr[ac] = String.fromCharCode(o1);
                    } else if (h4 === 64) {
                      arr[ac] = String.fromCharCode(o1, o2);
                    } else {
                      arr[ac] = String.fromCharCode(o1, o2, o3);
                    }
                  } while (i < input.length);

                  dec = arr.join('');
                  dec = utf8 ? utf8Decode(dec) : dec;
                  return dec;
                }; // set custom pad string


                this.setPad = function (str) {
                  pad = str || pad;
                  return this;
                }; // set custom tab string characters


                this.setTab = function (str) {
                  tab = str || tab;
                  return this;
                };

                this.setUTF8 = function (bool) {
                  if (typeof bool === 'boolean') {
                    utf8 = bool;
                  }

                  return this;
                };
              },

              /**
               * CRC-32 calculation
               * @member Hashes
               * @method CRC32
               * @static
               * @param {String} str Input String
               * @return {String}
               */
              CRC32: function CRC32(str) {
                var crc = 0,
                    x = 0,
                    y = 0,
                    table,
                    i,
                    iTop;
                str = utf8Encode(str);
                table = ['00000000 77073096 EE0E612C 990951BA 076DC419 706AF48F E963A535 9E6495A3 0EDB8832 ', '79DCB8A4 E0D5E91E 97D2D988 09B64C2B 7EB17CBD E7B82D07 90BF1D91 1DB71064 6AB020F2 F3B97148 ', '84BE41DE 1ADAD47D 6DDDE4EB F4D4B551 83D385C7 136C9856 646BA8C0 FD62F97A 8A65C9EC 14015C4F ', '63066CD9 FA0F3D63 8D080DF5 3B6E20C8 4C69105E D56041E4 A2677172 3C03E4D1 4B04D447 D20D85FD ', 'A50AB56B 35B5A8FA 42B2986C DBBBC9D6 ACBCF940 32D86CE3 45DF5C75 DCD60DCF ABD13D59 26D930AC ', '51DE003A C8D75180 BFD06116 21B4F4B5 56B3C423 CFBA9599 B8BDA50F 2802B89E 5F058808 C60CD9B2 ', 'B10BE924 2F6F7C87 58684C11 C1611DAB B6662D3D 76DC4190 01DB7106 98D220BC EFD5102A 71B18589 ', '06B6B51F 9FBFE4A5 E8B8D433 7807C9A2 0F00F934 9609A88E E10E9818 7F6A0DBB 086D3D2D 91646C97 ', 'E6635C01 6B6B51F4 1C6C6162 856530D8 F262004E 6C0695ED 1B01A57B 8208F4C1 F50FC457 65B0D9C6 ', '12B7E950 8BBEB8EA FCB9887C 62DD1DDF 15DA2D49 8CD37CF3 FBD44C65 4DB26158 3AB551CE A3BC0074 ', 'D4BB30E2 4ADFA541 3DD895D7 A4D1C46D D3D6F4FB 4369E96A 346ED9FC AD678846 DA60B8D0 44042D73 ', '33031DE5 AA0A4C5F DD0D7CC9 5005713C 270241AA BE0B1010 C90C2086 5768B525 206F85B3 B966D409 ', 'CE61E49F 5EDEF90E 29D9C998 B0D09822 C7D7A8B4 59B33D17 2EB40D81 B7BD5C3B C0BA6CAD EDB88320 ', '9ABFB3B6 03B6E20C 74B1D29A EAD54739 9DD277AF 04DB2615 73DC1683 E3630B12 94643B84 0D6D6A3E ', '7A6A5AA8 E40ECF0B 9309FF9D 0A00AE27 7D079EB1 F00F9344 8708A3D2 1E01F268 6906C2FE F762575D ', '806567CB 196C3671 6E6B06E7 FED41B76 89D32BE0 10DA7A5A 67DD4ACC F9B9DF6F 8EBEEFF9 17B7BE43 ', '60B08ED5 D6D6A3E8 A1D1937E 38D8C2C4 4FDFF252 D1BB67F1 A6BC5767 3FB506DD 48B2364B D80D2BDA ', 'AF0A1B4C 36034AF6 41047A60 DF60EFC3 A867DF55 316E8EEF 4669BE79 CB61B38C BC66831A 256FD2A0 ', '5268E236 CC0C7795 BB0B4703 220216B9 5505262F C5BA3BBE B2BD0B28 2BB45A92 5CB36A04 C2D7FFA7 ', 'B5D0CF31 2CD99E8B 5BDEAE1D 9B64C2B0 EC63F226 756AA39C 026D930A 9C0906A9 EB0E363F 72076785 ', '05005713 95BF4A82 E2B87A14 7BB12BAE 0CB61B38 92D28E9B E5D5BE0D 7CDCEFB7 0BDBDF21 86D3D2D4 ', 'F1D4E242 68DDB3F8 1FDA836E 81BE16CD F6B9265B 6FB077E1 18B74777 88085AE6 FF0F6A70 66063BCA ', '11010B5C 8F659EFF F862AE69 616BFFD3 166CCF45 A00AE278 D70DD2EE 4E048354 3903B3C2 A7672661 ', 'D06016F7 4969474D 3E6E77DB AED16A4A D9D65ADC 40DF0B66 37D83BF0 A9BCAE53 DEBB9EC5 47B2CF7F ', '30B5FFE9 BDBDF21C CABAC28A 53B39330 24B4A3A6 BAD03605 CDD70693 54DE5729 23D967BF B3667A2E ', 'C4614AB8 5D681B02 2A6F2B94 B40BBE37 C30C8EA1 5A05DF1B 2D02EF8D'].join('');
                crc = crc ^ -1;

                for (i = 0, iTop = str.length; i < iTop; i += 1) {
                  y = (crc ^ str.charCodeAt(i)) & 0xFF;
                  x = '0x' + table.substr(y * 9, 8);
                  crc = crc >>> 8 ^ x;
                } // always return a positive number (that's what >>> 0 does)


                return (crc ^ -1) >>> 0;
              },

              /**
               * @member Hashes
               * @class MD5
               * @constructor
               * @param {Object} [config]
               *
               * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
               * Digest Algorithm, as defined in RFC 1321.
               * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
               * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
               * See <http://pajhome.org.uk/crypt/md5> for more infHashes.
               */
              MD5: function MD5(options) {
                /**
                 * Private config properties. You may need to tweak these to be compatible with
                 * the server-side, but the defaults work in most cases.
                 * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
                 */
                var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
                    // hexadecimal output case format. false - lowercase; true - uppercase
                b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
                    // base-64 pad character. Defaults to '=' for strict RFC compliance
                utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true; // enable/disable utf8 encoding
                // privileged (public) methods

                this.hex = function (s) {
                  return rstr2hex(rstr(s), hexcase);
                };

                this.b64 = function (s) {
                  return rstr2b64(rstr(s), b64pad);
                };

                this.any = function (s, e) {
                  return rstr2any(rstr(s), e);
                };

                this.raw = function (s) {
                  return rstr(s);
                };

                this.hex_hmac = function (k, d) {
                  return rstr2hex(rstr_hmac(k, d), hexcase);
                };

                this.b64_hmac = function (k, d) {
                  return rstr2b64(rstr_hmac(k, d), b64pad);
                };

                this.any_hmac = function (k, d, e) {
                  return rstr2any(rstr_hmac(k, d), e);
                };
                /**
                 * Perform a simple self-test to see if the VM is working
                 * @return {String} Hexadecimal hash sample
                 */


                this.vm_test = function () {
                  return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
                };
                /**
                 * Enable/disable uppercase hexadecimal returned string
                 * @param {Boolean}
                 * @return {Object} this
                 */


                this.setUpperCase = function (a) {
                  if (typeof a === 'boolean') {
                    hexcase = a;
                  }

                  return this;
                };
                /**
                 * Defines a base64 pad string
                 * @param {String} Pad
                 * @return {Object} this
                 */


                this.setPad = function (a) {
                  b64pad = a || b64pad;
                  return this;
                };
                /**
                 * Defines a base64 pad string
                 * @param {Boolean}
                 * @return {Object} [this]
                 */


                this.setUTF8 = function (a) {
                  if (typeof a === 'boolean') {
                    utf8 = a;
                  }

                  return this;
                }; // private methods

                /**
                 * Calculate the MD5 of a raw string
                 */


                function rstr(s) {
                  s = utf8 ? utf8Encode(s) : s;
                  return binl2rstr(binl(rstr2binl(s), s.length * 8));
                }
                /**
                 * Calculate the HMAC-MD5, of a key and some data (raw strings)
                 */


                function rstr_hmac(key, data) {
                  var bkey, ipad, opad, hash, i;
                  key = utf8 ? utf8Encode(key) : key;
                  data = utf8 ? utf8Encode(data) : data;
                  bkey = rstr2binl(key);

                  if (bkey.length > 16) {
                    bkey = binl(bkey, key.length * 8);
                  }

                  ipad = Array(16), opad = Array(16);

                  for (i = 0; i < 16; i += 1) {
                    ipad[i] = bkey[i] ^ 0x36363636;
                    opad[i] = bkey[i] ^ 0x5C5C5C5C;
                  }

                  hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
                  return binl2rstr(binl(opad.concat(hash), 512 + 128));
                }
                /**
                 * Calculate the MD5 of an array of little-endian words, and a bit length.
                 */


                function binl(x, len) {
                  var i,
                      olda,
                      oldb,
                      oldc,
                      oldd,
                      a = 1732584193,
                      b = -271733879,
                      c = -1732584194,
                      d = 271733878;
                  /* append padding */

                  x[len >> 5] |= 0x80 << len % 32;
                  x[(len + 64 >>> 9 << 4) + 14] = len;

                  for (i = 0; i < x.length; i += 16) {
                    olda = a;
                    oldb = b;
                    oldc = c;
                    oldd = d;
                    a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
                    d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
                    c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
                    b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
                    a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
                    d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
                    c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
                    b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
                    a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
                    d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
                    c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
                    b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
                    a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
                    d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
                    c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
                    b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
                    a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
                    d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
                    c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
                    b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
                    a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
                    d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
                    c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
                    b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
                    a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
                    d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
                    c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
                    b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
                    a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
                    d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
                    c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
                    b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
                    a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
                    d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
                    c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
                    b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
                    a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
                    d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
                    c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
                    b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
                    a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
                    d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
                    c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
                    b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
                    a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
                    d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
                    c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
                    b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
                    a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
                    d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
                    c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
                    b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
                    a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
                    d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
                    c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
                    b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
                    a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
                    d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
                    c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
                    b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
                    a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
                    d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
                    c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
                    b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
                    a = safe_add(a, olda);
                    b = safe_add(b, oldb);
                    c = safe_add(c, oldc);
                    d = safe_add(d, oldd);
                  }

                  return Array(a, b, c, d);
                }
                /**
                 * These functions implement the four basic operations the algorithm uses.
                 */


                function md5_cmn(q, a, b, x, s, t) {
                  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
                }

                function md5_ff(a, b, c, d, x, s, t) {
                  return md5_cmn(b & c | ~b & d, a, b, x, s, t);
                }

                function md5_gg(a, b, c, d, x, s, t) {
                  return md5_cmn(b & d | c & ~d, a, b, x, s, t);
                }

                function md5_hh(a, b, c, d, x, s, t) {
                  return md5_cmn(b ^ c ^ d, a, b, x, s, t);
                }

                function md5_ii(a, b, c, d, x, s, t) {
                  return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
                }
              },

              /**
               * @member Hashes
               * @class Hashes.SHA1
               * @param {Object} [config]
               * @constructor
               *
               * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined in FIPS 180-1
               * Version 2.2 Copyright Paul Johnston 2000 - 2009.
               * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
               * See http://pajhome.org.uk/crypt/md5 for details.
               */
              SHA1: function SHA1(options) {
                /**
                 * Private config properties. You may need to tweak these to be compatible with
                 * the server-side, but the defaults work in most cases.
                 * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
                 */
                var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
                    // hexadecimal output case format. false - lowercase; true - uppercase
                b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
                    // base-64 pad character. Defaults to '=' for strict RFC compliance
                utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true; // enable/disable utf8 encoding
                // public methods

                this.hex = function (s) {
                  return rstr2hex(rstr(s), hexcase);
                };

                this.b64 = function (s) {
                  return rstr2b64(rstr(s), b64pad);
                };

                this.any = function (s, e) {
                  return rstr2any(rstr(s), e);
                };

                this.raw = function (s) {
                  return rstr(s);
                };

                this.hex_hmac = function (k, d) {
                  return rstr2hex(rstr_hmac(k, d));
                };

                this.b64_hmac = function (k, d) {
                  return rstr2b64(rstr_hmac(k, d), b64pad);
                };

                this.any_hmac = function (k, d, e) {
                  return rstr2any(rstr_hmac(k, d), e);
                };
                /**
                 * Perform a simple self-test to see if the VM is working
                 * @return {String} Hexadecimal hash sample
                 * @public
                 */


                this.vm_test = function () {
                  return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
                };
                /**
                 * @description Enable/disable uppercase hexadecimal returned string
                 * @param {boolean}
                 * @return {Object} this
                 * @public
                 */


                this.setUpperCase = function (a) {
                  if (typeof a === 'boolean') {
                    hexcase = a;
                  }

                  return this;
                };
                /**
                 * @description Defines a base64 pad string
                 * @param {string} Pad
                 * @return {Object} this
                 * @public
                 */


                this.setPad = function (a) {
                  b64pad = a || b64pad;
                  return this;
                };
                /**
                 * @description Defines a base64 pad string
                 * @param {boolean}
                 * @return {Object} this
                 * @public
                 */


                this.setUTF8 = function (a) {
                  if (typeof a === 'boolean') {
                    utf8 = a;
                  }

                  return this;
                }; // private methods

                /**
                 * Calculate the SHA-512 of a raw string
                 */


                function rstr(s) {
                  s = utf8 ? utf8Encode(s) : s;
                  return binb2rstr(binb(rstr2binb(s), s.length * 8));
                }
                /**
                 * Calculate the HMAC-SHA1 of a key and some data (raw strings)
                 */


                function rstr_hmac(key, data) {
                  var bkey, ipad, opad, i, hash;
                  key = utf8 ? utf8Encode(key) : key;
                  data = utf8 ? utf8Encode(data) : data;
                  bkey = rstr2binb(key);

                  if (bkey.length > 16) {
                    bkey = binb(bkey, key.length * 8);
                  }

                  ipad = Array(16), opad = Array(16);

                  for (i = 0; i < 16; i += 1) {
                    ipad[i] = bkey[i] ^ 0x36363636;
                    opad[i] = bkey[i] ^ 0x5C5C5C5C;
                  }

                  hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
                  return binb2rstr(binb(opad.concat(hash), 512 + 160));
                }
                /**
                 * Calculate the SHA-1 of an array of big-endian words, and a bit length
                 */


                function binb(x, len) {
                  var i,
                      j,
                      t,
                      olda,
                      oldb,
                      oldc,
                      oldd,
                      olde,
                      w = Array(80),
                      a = 1732584193,
                      b = -271733879,
                      c = -1732584194,
                      d = 271733878,
                      e = -1009589776;
                  /* append padding */

                  x[len >> 5] |= 0x80 << 24 - len % 32;
                  x[(len + 64 >> 9 << 4) + 15] = len;

                  for (i = 0; i < x.length; i += 16) {
                    olda = a;
                    oldb = b;
                    oldc = c;
                    oldd = d;
                    olde = e;

                    for (j = 0; j < 80; j += 1) {
                      if (j < 16) {
                        w[j] = x[i + j];
                      } else {
                        w[j] = bit_rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
                      }

                      t = safe_add(safe_add(bit_rol(a, 5), sha1_ft(j, b, c, d)), safe_add(safe_add(e, w[j]), sha1_kt(j)));
                      e = d;
                      d = c;
                      c = bit_rol(b, 30);
                      b = a;
                      a = t;
                    }

                    a = safe_add(a, olda);
                    b = safe_add(b, oldb);
                    c = safe_add(c, oldc);
                    d = safe_add(d, oldd);
                    e = safe_add(e, olde);
                  }

                  return Array(a, b, c, d, e);
                }
                /**
                 * Perform the appropriate triplet combination function for the current
                 * iteration
                 */


                function sha1_ft(t, b, c, d) {
                  if (t < 20) {
                    return b & c | ~b & d;
                  }

                  if (t < 40) {
                    return b ^ c ^ d;
                  }

                  if (t < 60) {
                    return b & c | b & d | c & d;
                  }

                  return b ^ c ^ d;
                }
                /**
                 * Determine the appropriate additive constant for the current iteration
                 */


                function sha1_kt(t) {
                  return t < 20 ? 1518500249 : t < 40 ? 1859775393 : t < 60 ? -1894007588 : -899497514;
                }
              },

              /**
               * @class Hashes.SHA256
               * @param {config}
               *
               * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined in FIPS 180-2
               * Version 2.2 Copyright Angel Marin, Paul Johnston 2000 - 2009.
               * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
               * See http://pajhome.org.uk/crypt/md5 for details.
               * Also http://anmar.eu.org/projects/jssha2/
               */
              SHA256: function SHA256(options) {
                /**
                 * Private properties configuration variables. You may need to tweak these to be compatible with
                 * the server-side, but the defaults work in most cases.
                 * @see this.setUpperCase() method
                 * @see this.setPad() method
                 */
                options && typeof options.uppercase === 'boolean' ? options.uppercase : false;
                    var // hexadecimal output case format. false - lowercase; true - uppercase  */
                b64pad = options && typeof options.pad === 'string' ? options.pad : '=',

                /* base-64 pad character. Default '=' for strict RFC compliance   */
                utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,

                /* enable/disable utf8 encoding */
                sha256_K;
                /* privileged (public) methods */

                this.hex = function (s) {
                  return rstr2hex(rstr(s, utf8));
                };

                this.b64 = function (s) {
                  return rstr2b64(rstr(s, utf8), b64pad);
                };

                this.any = function (s, e) {
                  return rstr2any(rstr(s, utf8), e);
                };

                this.raw = function (s) {
                  return rstr(s, utf8);
                };

                this.hex_hmac = function (k, d) {
                  return rstr2hex(rstr_hmac(k, d));
                };

                this.b64_hmac = function (k, d) {
                  return rstr2b64(rstr_hmac(k, d), b64pad);
                };

                this.any_hmac = function (k, d, e) {
                  return rstr2any(rstr_hmac(k, d), e);
                };
                /**
                 * Perform a simple self-test to see if the VM is working
                 * @return {String} Hexadecimal hash sample
                 * @public
                 */


                this.vm_test = function () {
                  return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
                };
                /**
                 * Enable/disable uppercase hexadecimal returned string
                 * @param {boolean}
                 * @return {Object} this
                 * @public
                 */


                this.setUpperCase = function (a) {

                  return this;
                };
                /**
                 * @description Defines a base64 pad string
                 * @param {string} Pad
                 * @return {Object} this
                 * @public
                 */


                this.setPad = function (a) {
                  b64pad = a || b64pad;
                  return this;
                };
                /**
                 * Defines a base64 pad string
                 * @param {boolean}
                 * @return {Object} this
                 * @public
                 */


                this.setUTF8 = function (a) {
                  if (typeof a === 'boolean') {
                    utf8 = a;
                  }

                  return this;
                }; // private methods

                /**
                 * Calculate the SHA-512 of a raw string
                 */


                function rstr(s, utf8) {
                  s = utf8 ? utf8Encode(s) : s;
                  return binb2rstr(binb(rstr2binb(s), s.length * 8));
                }
                /**
                 * Calculate the HMAC-sha256 of a key and some data (raw strings)
                 */


                function rstr_hmac(key, data) {
                  key = utf8 ? utf8Encode(key) : key;
                  data = utf8 ? utf8Encode(data) : data;
                  var hash,
                      i = 0,
                      bkey = rstr2binb(key),
                      ipad = Array(16),
                      opad = Array(16);

                  if (bkey.length > 16) {
                    bkey = binb(bkey, key.length * 8);
                  }

                  for (; i < 16; i += 1) {
                    ipad[i] = bkey[i] ^ 0x36363636;
                    opad[i] = bkey[i] ^ 0x5C5C5C5C;
                  }

                  hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
                  return binb2rstr(binb(opad.concat(hash), 512 + 256));
                }
                /*
                 * Main sha256 function, with its support functions
                 */


                function sha256_S(X, n) {
                  return X >>> n | X << 32 - n;
                }

                function sha256_R(X, n) {
                  return X >>> n;
                }

                function sha256_Ch(x, y, z) {
                  return x & y ^ ~x & z;
                }

                function sha256_Maj(x, y, z) {
                  return x & y ^ x & z ^ y & z;
                }

                function sha256_Sigma0256(x) {
                  return sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22);
                }

                function sha256_Sigma1256(x) {
                  return sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25);
                }

                function sha256_Gamma0256(x) {
                  return sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3);
                }

                function sha256_Gamma1256(x) {
                  return sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10);
                }

                sha256_K = [1116352408, 1899447441, -1245643825, -373957723, 961987163, 1508970993, -1841331548, -1424204075, -670586216, 310598401, 607225278, 1426881987, 1925078388, -2132889090, -1680079193, -1046744716, -459576895, -272742522, 264347078, 604807628, 770255983, 1249150122, 1555081692, 1996064986, -1740746414, -1473132947, -1341970488, -1084653625, -958395405, -710438585, 113926993, 338241895, 666307205, 773529912, 1294757372, 1396182291, 1695183700, 1986661051, -2117940946, -1838011259, -1564481375, -1474664885, -1035236496, -949202525, -778901479, -694614492, -200395387, 275423344, 430227734, 506948616, 659060556, 883997877, 958139571, 1322822218, 1537002063, 1747873779, 1955562222, 2024104815, -2067236844, -1933114872, -1866530822, -1538233109, -1090935817, -965641998];

                function binb(m, l) {
                  var HASH = [1779033703, -1150833019, 1013904242, -1521486534, 1359893119, -1694144372, 528734635, 1541459225];
                  var W = new Array(64);
                  var a, b, c, d, e, f, g, h;
                  var i, j, T1, T2;
                  /* append padding */

                  m[l >> 5] |= 0x80 << 24 - l % 32;
                  m[(l + 64 >> 9 << 4) + 15] = l;

                  for (i = 0; i < m.length; i += 16) {
                    a = HASH[0];
                    b = HASH[1];
                    c = HASH[2];
                    d = HASH[3];
                    e = HASH[4];
                    f = HASH[5];
                    g = HASH[6];
                    h = HASH[7];

                    for (j = 0; j < 64; j += 1) {
                      if (j < 16) {
                        W[j] = m[j + i];
                      } else {
                        W[j] = safe_add(safe_add(safe_add(sha256_Gamma1256(W[j - 2]), W[j - 7]), sha256_Gamma0256(W[j - 15])), W[j - 16]);
                      }

                      T1 = safe_add(safe_add(safe_add(safe_add(h, sha256_Sigma1256(e)), sha256_Ch(e, f, g)), sha256_K[j]), W[j]);
                      T2 = safe_add(sha256_Sigma0256(a), sha256_Maj(a, b, c));
                      h = g;
                      g = f;
                      f = e;
                      e = safe_add(d, T1);
                      d = c;
                      c = b;
                      b = a;
                      a = safe_add(T1, T2);
                    }

                    HASH[0] = safe_add(a, HASH[0]);
                    HASH[1] = safe_add(b, HASH[1]);
                    HASH[2] = safe_add(c, HASH[2]);
                    HASH[3] = safe_add(d, HASH[3]);
                    HASH[4] = safe_add(e, HASH[4]);
                    HASH[5] = safe_add(f, HASH[5]);
                    HASH[6] = safe_add(g, HASH[6]);
                    HASH[7] = safe_add(h, HASH[7]);
                  }

                  return HASH;
                }
              },

              /**
               * @class Hashes.SHA512
               * @param {config}
               *
               * A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined in FIPS 180-2
               * Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
               * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
               * See http://pajhome.org.uk/crypt/md5 for details.
               */
              SHA512: function SHA512(options) {
                /**
                 * Private properties configuration variables. You may need to tweak these to be compatible with
                 * the server-side, but the defaults work in most cases.
                 * @see this.setUpperCase() method
                 * @see this.setPad() method
                 */
                options && typeof options.uppercase === 'boolean' ? options.uppercase : false;

                var /* hexadecimal output case format. false - lowercase; true - uppercase  */
                b64pad = options && typeof options.pad === 'string' ? options.pad : '=',

                /* base-64 pad character. Default '=' for strict RFC compliance   */
                utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,

                /* enable/disable utf8 encoding */
                sha512_k;
                /* privileged (public) methods */

                this.hex = function (s) {
                  return rstr2hex(rstr(s));
                };

                this.b64 = function (s) {
                  return rstr2b64(rstr(s), b64pad);
                };

                this.any = function (s, e) {
                  return rstr2any(rstr(s), e);
                };

                this.raw = function (s) {
                  return rstr(s);
                };

                this.hex_hmac = function (k, d) {
                  return rstr2hex(rstr_hmac(k, d));
                };

                this.b64_hmac = function (k, d) {
                  return rstr2b64(rstr_hmac(k, d), b64pad);
                };

                this.any_hmac = function (k, d, e) {
                  return rstr2any(rstr_hmac(k, d), e);
                };
                /**
                 * Perform a simple self-test to see if the VM is working
                 * @return {String} Hexadecimal hash sample
                 * @public
                 */


                this.vm_test = function () {
                  return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
                };
                /**
                 * @description Enable/disable uppercase hexadecimal returned string
                 * @param {boolean}
                 * @return {Object} this
                 * @public
                 */


                this.setUpperCase = function (a) {

                  return this;
                };
                /**
                 * @description Defines a base64 pad string
                 * @param {string} Pad
                 * @return {Object} this
                 * @public
                 */


                this.setPad = function (a) {
                  b64pad = a || b64pad;
                  return this;
                };
                /**
                 * @description Defines a base64 pad string
                 * @param {boolean}
                 * @return {Object} this
                 * @public
                 */


                this.setUTF8 = function (a) {
                  if (typeof a === 'boolean') {
                    utf8 = a;
                  }

                  return this;
                };
                /* private methods */

                /**
                 * Calculate the SHA-512 of a raw string
                 */


                function rstr(s) {
                  s = utf8 ? utf8Encode(s) : s;
                  return binb2rstr(binb(rstr2binb(s), s.length * 8));
                }
                /*
                 * Calculate the HMAC-SHA-512 of a key and some data (raw strings)
                 */


                function rstr_hmac(key, data) {
                  key = utf8 ? utf8Encode(key) : key;
                  data = utf8 ? utf8Encode(data) : data;
                  var hash,
                      i = 0,
                      bkey = rstr2binb(key),
                      ipad = Array(32),
                      opad = Array(32);

                  if (bkey.length > 32) {
                    bkey = binb(bkey, key.length * 8);
                  }

                  for (; i < 32; i += 1) {
                    ipad[i] = bkey[i] ^ 0x36363636;
                    opad[i] = bkey[i] ^ 0x5C5C5C5C;
                  }

                  hash = binb(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
                  return binb2rstr(binb(opad.concat(hash), 1024 + 512));
                }
                /**
                 * Calculate the SHA-512 of an array of big-endian dwords, and a bit length
                 */


                function binb(x, len) {
                  var j,
                      i,
                      l,
                      W = new Array(80),
                      hash = new Array(16),
                      //Initial hash values
                  H = [new int64(0x6a09e667, -205731576), new int64(-1150833019, -2067093701), new int64(0x3c6ef372, -23791573), new int64(-1521486534, 0x5f1d36f1), new int64(0x510e527f, -1377402159), new int64(-1694144372, 0x2b3e6c1f), new int64(0x1f83d9ab, -79577749), new int64(0x5be0cd19, 0x137e2179)],
                      T1 = new int64(0, 0),
                      T2 = new int64(0, 0),
                      a = new int64(0, 0),
                      b = new int64(0, 0),
                      c = new int64(0, 0),
                      d = new int64(0, 0),
                      e = new int64(0, 0),
                      f = new int64(0, 0),
                      g = new int64(0, 0),
                      h = new int64(0, 0),
                      //Temporary variables not specified by the document
                  s0 = new int64(0, 0),
                      s1 = new int64(0, 0),
                      Ch = new int64(0, 0),
                      Maj = new int64(0, 0),
                      r1 = new int64(0, 0),
                      r2 = new int64(0, 0),
                      r3 = new int64(0, 0);

                  if (sha512_k === undefined) {
                    //SHA512 constants
                    sha512_k = [new int64(0x428a2f98, -685199838), new int64(0x71374491, 0x23ef65cd), new int64(-1245643825, -330482897), new int64(-373957723, -2121671748), new int64(0x3956c25b, -213338824), new int64(0x59f111f1, -1241133031), new int64(-1841331548, -1357295717), new int64(-1424204075, -630357736), new int64(-670586216, -1560083902), new int64(0x12835b01, 0x45706fbe), new int64(0x243185be, 0x4ee4b28c), new int64(0x550c7dc3, -704662302), new int64(0x72be5d74, -226784913), new int64(-2132889090, 0x3b1696b1), new int64(-1680079193, 0x25c71235), new int64(-1046744716, -815192428), new int64(-459576895, -1628353838), new int64(-272742522, 0x384f25e3), new int64(0xfc19dc6, -1953704523), new int64(0x240ca1cc, 0x77ac9c65), new int64(0x2de92c6f, 0x592b0275), new int64(0x4a7484aa, 0x6ea6e483), new int64(0x5cb0a9dc, -1119749164), new int64(0x76f988da, -2096016459), new int64(-1740746414, -295247957), new int64(-1473132947, 0x2db43210), new int64(-1341970488, -1728372417), new int64(-1084653625, -1091629340), new int64(-958395405, 0x3da88fc2), new int64(-710438585, -1828018395), new int64(0x6ca6351, -536640913), new int64(0x14292967, 0xa0e6e70), new int64(0x27b70a85, 0x46d22ffc), new int64(0x2e1b2138, 0x5c26c926), new int64(0x4d2c6dfc, 0x5ac42aed), new int64(0x53380d13, -1651133473), new int64(0x650a7354, -1951439906), new int64(0x766a0abb, 0x3c77b2a8), new int64(-2117940946, 0x47edaee6), new int64(-1838011259, 0x1482353b), new int64(-1564481375, 0x4cf10364), new int64(-1474664885, -1136513023), new int64(-1035236496, -789014639), new int64(-949202525, 0x654be30), new int64(-778901479, -688958952), new int64(-694614492, 0x5565a910), new int64(-200395387, 0x5771202a), new int64(0x106aa070, 0x32bbd1b8), new int64(0x19a4c116, -1194143544), new int64(0x1e376c08, 0x5141ab53), new int64(0x2748774c, -544281703), new int64(0x34b0bcb5, -509917016), new int64(0x391c0cb3, -976659869), new int64(0x4ed8aa4a, -482243893), new int64(0x5b9cca4f, 0x7763e373), new int64(0x682e6ff3, -692930397), new int64(0x748f82ee, 0x5defb2fc), new int64(0x78a5636f, 0x43172f60), new int64(-2067236844, -1578062990), new int64(-1933114872, 0x1a6439ec), new int64(-1866530822, 0x23631e28), new int64(-1538233109, -561857047), new int64(-1090935817, -1295615723), new int64(-965641998, -479046869), new int64(-903397682, -366583396), new int64(-779700025, 0x21c0c207), new int64(-354779690, -840897762), new int64(-176337025, -294727304), new int64(0x6f067aa, 0x72176fba), new int64(0xa637dc5, -1563912026), new int64(0x113f9804, -1090974290), new int64(0x1b710b35, 0x131c471b), new int64(0x28db77f5, 0x23047d84), new int64(0x32caab7b, 0x40c72493), new int64(0x3c9ebe0a, 0x15c9bebc), new int64(0x431d67c4, -1676669620), new int64(0x4cc5d4be, -885112138), new int64(0x597f299c, -60457430), new int64(0x5fcb6fab, 0x3ad6faec), new int64(0x6c44198c, 0x4a475817)];
                  }

                  for (i = 0; i < 80; i += 1) {
                    W[i] = new int64(0, 0);
                  } // append padding to the source string. The format is described in the FIPS.


                  x[len >> 5] |= 0x80 << 24 - (len & 0x1f);
                  x[(len + 128 >> 10 << 5) + 31] = len;
                  l = x.length;

                  for (i = 0; i < l; i += 32) {
                    //32 dwords is the block size
                    int64copy(a, H[0]);
                    int64copy(b, H[1]);
                    int64copy(c, H[2]);
                    int64copy(d, H[3]);
                    int64copy(e, H[4]);
                    int64copy(f, H[5]);
                    int64copy(g, H[6]);
                    int64copy(h, H[7]);

                    for (j = 0; j < 16; j += 1) {
                      W[j].h = x[i + 2 * j];
                      W[j].l = x[i + 2 * j + 1];
                    }

                    for (j = 16; j < 80; j += 1) {
                      //sigma1
                      int64rrot(r1, W[j - 2], 19);
                      int64revrrot(r2, W[j - 2], 29);
                      int64shr(r3, W[j - 2], 6);
                      s1.l = r1.l ^ r2.l ^ r3.l;
                      s1.h = r1.h ^ r2.h ^ r3.h; //sigma0

                      int64rrot(r1, W[j - 15], 1);
                      int64rrot(r2, W[j - 15], 8);
                      int64shr(r3, W[j - 15], 7);
                      s0.l = r1.l ^ r2.l ^ r3.l;
                      s0.h = r1.h ^ r2.h ^ r3.h;
                      int64add4(W[j], s1, W[j - 7], s0, W[j - 16]);
                    }

                    for (j = 0; j < 80; j += 1) {
                      //Ch
                      Ch.l = e.l & f.l ^ ~e.l & g.l;
                      Ch.h = e.h & f.h ^ ~e.h & g.h; //Sigma1

                      int64rrot(r1, e, 14);
                      int64rrot(r2, e, 18);
                      int64revrrot(r3, e, 9);
                      s1.l = r1.l ^ r2.l ^ r3.l;
                      s1.h = r1.h ^ r2.h ^ r3.h; //Sigma0

                      int64rrot(r1, a, 28);
                      int64revrrot(r2, a, 2);
                      int64revrrot(r3, a, 7);
                      s0.l = r1.l ^ r2.l ^ r3.l;
                      s0.h = r1.h ^ r2.h ^ r3.h; //Maj

                      Maj.l = a.l & b.l ^ a.l & c.l ^ b.l & c.l;
                      Maj.h = a.h & b.h ^ a.h & c.h ^ b.h & c.h;
                      int64add5(T1, h, s1, Ch, sha512_k[j], W[j]);
                      int64add(T2, s0, Maj);
                      int64copy(h, g);
                      int64copy(g, f);
                      int64copy(f, e);
                      int64add(e, d, T1);
                      int64copy(d, c);
                      int64copy(c, b);
                      int64copy(b, a);
                      int64add(a, T1, T2);
                    }

                    int64add(H[0], H[0], a);
                    int64add(H[1], H[1], b);
                    int64add(H[2], H[2], c);
                    int64add(H[3], H[3], d);
                    int64add(H[4], H[4], e);
                    int64add(H[5], H[5], f);
                    int64add(H[6], H[6], g);
                    int64add(H[7], H[7], h);
                  } //represent the hash as an array of 32-bit dwords


                  for (i = 0; i < 8; i += 1) {
                    hash[2 * i] = H[i].h;
                    hash[2 * i + 1] = H[i].l;
                  }

                  return hash;
                } //A constructor for 64-bit numbers


                function int64(h, l) {
                  this.h = h;
                  this.l = l; //this.toString = int64toString;
                } //Copies src into dst, assuming both are 64-bit numbers


                function int64copy(dst, src) {
                  dst.h = src.h;
                  dst.l = src.l;
                } //Right-rotates a 64-bit number by shift
                //Won't handle cases of shift>=32
                //The function revrrot() is for that


                function int64rrot(dst, x, shift) {
                  dst.l = x.l >>> shift | x.h << 32 - shift;
                  dst.h = x.h >>> shift | x.l << 32 - shift;
                } //Reverses the dwords of the source and then rotates right by shift.
                //This is equivalent to rotation by 32+shift


                function int64revrrot(dst, x, shift) {
                  dst.l = x.h >>> shift | x.l << 32 - shift;
                  dst.h = x.l >>> shift | x.h << 32 - shift;
                } //Bitwise-shifts right a 64-bit number by shift
                //Won't handle shift>=32, but it's never needed in SHA512


                function int64shr(dst, x, shift) {
                  dst.l = x.l >>> shift | x.h << 32 - shift;
                  dst.h = x.h >>> shift;
                } //Adds two 64-bit numbers
                //Like the original implementation, does not rely on 32-bit operations


                function int64add(dst, x, y) {
                  var w0 = (x.l & 0xffff) + (y.l & 0xffff);
                  var w1 = (x.l >>> 16) + (y.l >>> 16) + (w0 >>> 16);
                  var w2 = (x.h & 0xffff) + (y.h & 0xffff) + (w1 >>> 16);
                  var w3 = (x.h >>> 16) + (y.h >>> 16) + (w2 >>> 16);
                  dst.l = w0 & 0xffff | w1 << 16;
                  dst.h = w2 & 0xffff | w3 << 16;
                } //Same, except with 4 addends. Works faster than adding them one by one.


                function int64add4(dst, a, b, c, d) {
                  var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff);
                  var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (w0 >>> 16);
                  var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (w1 >>> 16);
                  var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (w2 >>> 16);
                  dst.l = w0 & 0xffff | w1 << 16;
                  dst.h = w2 & 0xffff | w3 << 16;
                } //Same, except with 5 addends


                function int64add5(dst, a, b, c, d, e) {
                  var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff) + (e.l & 0xffff),
                      w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (e.l >>> 16) + (w0 >>> 16),
                      w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (e.h & 0xffff) + (w1 >>> 16),
                      w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (e.h >>> 16) + (w2 >>> 16);
                  dst.l = w0 & 0xffff | w1 << 16;
                  dst.h = w2 & 0xffff | w3 << 16;
                }
              },

              /**
               * @class Hashes.RMD160
               * @constructor
               * @param {Object} [config]
               *
               * A JavaScript implementation of the RIPEMD-160 Algorithm
               * Version 2.2 Copyright Jeremy Lin, Paul Johnston 2000 - 2009.
               * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
               * See http://pajhome.org.uk/crypt/md5 for details.
               * Also http://www.ocf.berkeley.edu/~jjlin/jsotp/
               */
              RMD160: function RMD160(options) {
                /**
                 * Private properties configuration variables. You may need to tweak these to be compatible with
                 * the server-side, but the defaults work in most cases.
                 * @see this.setUpperCase() method
                 * @see this.setPad() method
                 */
                options && typeof options.uppercase === 'boolean' ? options.uppercase : false;

                var /* hexadecimal output case format. false - lowercase; true - uppercase  */
                b64pad = options && typeof options.pad === 'string' ? options.pa : '=',

                /* base-64 pad character. Default '=' for strict RFC compliance   */
                utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,

                /* enable/disable utf8 encoding */
                rmd160_r1 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8, 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12, 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2, 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13],
                    rmd160_r2 = [5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12, 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2, 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13, 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14, 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11],
                    rmd160_s1 = [11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8, 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12, 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5, 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12, 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6],
                    rmd160_s2 = [8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6, 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11, 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5, 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8, 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11];
                /* privileged (public) methods */

                this.hex = function (s) {
                  return rstr2hex(rstr(s));
                };

                this.b64 = function (s) {
                  return rstr2b64(rstr(s), b64pad);
                };

                this.any = function (s, e) {
                  return rstr2any(rstr(s), e);
                };

                this.raw = function (s) {
                  return rstr(s);
                };

                this.hex_hmac = function (k, d) {
                  return rstr2hex(rstr_hmac(k, d));
                };

                this.b64_hmac = function (k, d) {
                  return rstr2b64(rstr_hmac(k, d), b64pad);
                };

                this.any_hmac = function (k, d, e) {
                  return rstr2any(rstr_hmac(k, d), e);
                };
                /**
                 * Perform a simple self-test to see if the VM is working
                 * @return {String} Hexadecimal hash sample
                 * @public
                 */


                this.vm_test = function () {
                  return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
                };
                /**
                 * @description Enable/disable uppercase hexadecimal returned string
                 * @param {boolean}
                 * @return {Object} this
                 * @public
                 */


                this.setUpperCase = function (a) {

                  return this;
                };
                /**
                 * @description Defines a base64 pad string
                 * @param {string} Pad
                 * @return {Object} this
                 * @public
                 */


                this.setPad = function (a) {
                  if (typeof a !== 'undefined') {
                    b64pad = a;
                  }

                  return this;
                };
                /**
                 * @description Defines a base64 pad string
                 * @param {boolean}
                 * @return {Object} this
                 * @public
                 */


                this.setUTF8 = function (a) {
                  if (typeof a === 'boolean') {
                    utf8 = a;
                  }

                  return this;
                };
                /* private methods */

                /**
                 * Calculate the rmd160 of a raw string
                 */


                function rstr(s) {
                  s = utf8 ? utf8Encode(s) : s;
                  return binl2rstr(binl(rstr2binl(s), s.length * 8));
                }
                /**
                 * Calculate the HMAC-rmd160 of a key and some data (raw strings)
                 */


                function rstr_hmac(key, data) {
                  key = utf8 ? utf8Encode(key) : key;
                  data = utf8 ? utf8Encode(data) : data;
                  var i,
                      hash,
                      bkey = rstr2binl(key),
                      ipad = Array(16),
                      opad = Array(16);

                  if (bkey.length > 16) {
                    bkey = binl(bkey, key.length * 8);
                  }

                  for (i = 0; i < 16; i += 1) {
                    ipad[i] = bkey[i] ^ 0x36363636;
                    opad[i] = bkey[i] ^ 0x5C5C5C5C;
                  }

                  hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
                  return binl2rstr(binl(opad.concat(hash), 512 + 160));
                }
                /**
                 * Convert an array of little-endian words to a string
                 */


                function binl2rstr(input) {
                  var i,
                      output = '',
                      l = input.length * 32;

                  for (i = 0; i < l; i += 8) {
                    output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
                  }

                  return output;
                }
                /**
                 * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
                 */


                function binl(x, len) {
                  var T,
                      j,
                      i,
                      l,
                      h0 = 0x67452301,
                      h1 = 0xefcdab89,
                      h2 = 0x98badcfe,
                      h3 = 0x10325476,
                      h4 = 0xc3d2e1f0,
                      A1,
                      B1,
                      C1,
                      D1,
                      E1,
                      A2,
                      B2,
                      C2,
                      D2,
                      E2;
                  /* append padding */

                  x[len >> 5] |= 0x80 << len % 32;
                  x[(len + 64 >>> 9 << 4) + 14] = len;
                  l = x.length;

                  for (i = 0; i < l; i += 16) {
                    A1 = A2 = h0;
                    B1 = B2 = h1;
                    C1 = C2 = h2;
                    D1 = D2 = h3;
                    E1 = E2 = h4;

                    for (j = 0; j <= 79; j += 1) {
                      T = safe_add(A1, rmd160_f(j, B1, C1, D1));
                      T = safe_add(T, x[i + rmd160_r1[j]]);
                      T = safe_add(T, rmd160_K1(j));
                      T = safe_add(bit_rol(T, rmd160_s1[j]), E1);
                      A1 = E1;
                      E1 = D1;
                      D1 = bit_rol(C1, 10);
                      C1 = B1;
                      B1 = T;
                      T = safe_add(A2, rmd160_f(79 - j, B2, C2, D2));
                      T = safe_add(T, x[i + rmd160_r2[j]]);
                      T = safe_add(T, rmd160_K2(j));
                      T = safe_add(bit_rol(T, rmd160_s2[j]), E2);
                      A2 = E2;
                      E2 = D2;
                      D2 = bit_rol(C2, 10);
                      C2 = B2;
                      B2 = T;
                    }

                    T = safe_add(h1, safe_add(C1, D2));
                    h1 = safe_add(h2, safe_add(D1, E2));
                    h2 = safe_add(h3, safe_add(E1, A2));
                    h3 = safe_add(h4, safe_add(A1, B2));
                    h4 = safe_add(h0, safe_add(B1, C2));
                    h0 = T;
                  }

                  return [h0, h1, h2, h3, h4];
                } // specific algorithm methods


                function rmd160_f(j, x, y, z) {
                  return 0 <= j && j <= 15 ? x ^ y ^ z : 16 <= j && j <= 31 ? x & y | ~x & z : 32 <= j && j <= 47 ? (x | ~y) ^ z : 48 <= j && j <= 63 ? x & z | y & ~z : 64 <= j && j <= 79 ? x ^ (y | ~z) : 'rmd160_f: j out of range';
                }

                function rmd160_K1(j) {
                  return 0 <= j && j <= 15 ? 0x00000000 : 16 <= j && j <= 31 ? 0x5a827999 : 32 <= j && j <= 47 ? 0x6ed9eba1 : 48 <= j && j <= 63 ? 0x8f1bbcdc : 64 <= j && j <= 79 ? 0xa953fd4e : 'rmd160_K1: j out of range';
                }

                function rmd160_K2(j) {
                  return 0 <= j && j <= 15 ? 0x50a28be6 : 16 <= j && j <= 31 ? 0x5c4dd124 : 32 <= j && j <= 47 ? 0x6d703ef3 : 48 <= j && j <= 63 ? 0x7a6d76e9 : 64 <= j && j <= 79 ? 0x00000000 : 'rmd160_K2: j out of range';
                }
              }
            }; // exposes Hashes

            (function (window, undefined$1) {
              var freeExports = false;

              {
                freeExports = exports;

                if (exports && _typeof(commonjsGlobal) === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
                  window = commonjsGlobal;
                }
              }

              if (typeof undefined$1 === 'function' && _typeof(undefined$1.amd) === 'object' && undefined$1.amd) {
                // define as an anonymous module, so, through path mapping, it can be aliased
                undefined$1(function () {
                  return Hashes;
                });
              } else if (freeExports) {
                // in Node.js or RingoJS v0.8.0+
                if (module && module.exports === freeExports) {
                  module.exports = Hashes;
                } // in Narwhal or RingoJS v0.7.0-
                else {
                    freeExports.Hashes = Hashes;
                  }
              } else {
                // in a browser or Rhino
                window.Hashes = Hashes;
              }
            })(this);
          })(); // IIFE

        });

        var sha1 = new hashes.SHA1(); // # xtend

        var hasOwnProperty$1 = Object.prototype.hasOwnProperty;

        function xtend() {
          var target = {};

          for (var i = 0; i < arguments.length; i++) {
            var source = arguments[i];

            for (var key in source) {
              if (hasOwnProperty$1.call(source, key)) {
                target[key] = source[key];
              }
            }
          }

          return target;
        }

        var ohauth = {};

        ohauth.qsString = function (obj) {
          return Object.keys(obj).sort().map(function (key) {
            return ohauth.percentEncode(key) + '=' + ohauth.percentEncode(obj[key]);
          }).join('&');
        };

        ohauth.stringQs = function (str) {
          return str.split('&').filter(function (pair) {
            return pair !== '';
          }).reduce(function (obj, pair) {
            var parts = pair.split('=');
            obj[decodeURIComponent(parts[0])] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
            return obj;
          }, {});
        };

        ohauth.rawxhr = function (method, url, data, headers, callback) {
          var xhr = new XMLHttpRequest(),
              twoHundred = /^20\d$/;

          xhr.onreadystatechange = function () {
            if (4 === xhr.readyState && 0 !== xhr.status) {
              if (twoHundred.test(xhr.status)) callback(null, xhr);else return callback(xhr, null);
            }
          };

          xhr.onerror = function (e) {
            return callback(e, null);
          };

          xhr.open(method, url, true);

          for (var h in headers) {
            xhr.setRequestHeader(h, headers[h]);
          }

          xhr.send(data);
          return xhr;
        };

        ohauth.xhr = function (method, url, auth, data, options, callback) {
          var headers = options && options.header || {
            'Content-Type': 'application/x-www-form-urlencoded'
          };
          headers.Authorization = 'OAuth ' + ohauth.authHeader(auth);
          return ohauth.rawxhr(method, url, data, headers, callback);
        };

        ohauth.nonce = function () {
          for (var o = ''; o.length < 6;) {
            o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
          }

          return o;
        };

        ohauth.authHeader = function (obj) {
          return Object.keys(obj).sort().map(function (key) {
            return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
          }).join(', ');
        };

        ohauth.timestamp = function () {
          return ~~(+new Date() / 1000);
        };

        ohauth.percentEncode = function (s) {
          return encodeURIComponent(s).replace(/\!/g, '%21').replace(/\'/g, '%27').replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
        };

        ohauth.baseString = function (method, url, params) {
          if (params.oauth_signature) delete params.oauth_signature;
          return [method, ohauth.percentEncode(url), ohauth.percentEncode(ohauth.qsString(params))].join('&');
        };

        ohauth.signature = function (oauth_secret, token_secret, baseString) {
          return sha1.b64_hmac(ohauth.percentEncode(oauth_secret) + '&' + ohauth.percentEncode(token_secret), baseString);
        };
        /**
         * Takes an options object for configuration (consumer_key,
         * consumer_secret, version, signature_method, token, token_secret)
         * and returns a function that generates the Authorization header
         * for given data.
         *
         * The returned function takes these parameters:
         * - method: GET/POST/...
         * - uri: full URI with protocol, port, path and query string
         * - extra_params: any extra parameters (that are passed in the POST data),
         *   can be an object or a from-urlencoded string.
         *
         * Returned function returns full OAuth header with "OAuth" string in it.
         */


        ohauth.headerGenerator = function (options) {
          options = options || {};
          var consumer_key = options.consumer_key || '',
              consumer_secret = options.consumer_secret || '',
              signature_method = options.signature_method || 'HMAC-SHA1',
              version = options.version || '1.0',
              token = options.token || '',
              token_secret = options.token_secret || '';
          return function (method, uri, extra_params) {
            method = method.toUpperCase();

            if (typeof extra_params === 'string' && extra_params.length > 0) {
              extra_params = ohauth.stringQs(extra_params);
            }

            var uri_parts = uri.split('?', 2),
                base_uri = uri_parts[0];
            var query_params = uri_parts.length === 2 ? ohauth.stringQs(uri_parts[1]) : {};
            var oauth_params = {
              oauth_consumer_key: consumer_key,
              oauth_signature_method: signature_method,
              oauth_version: version,
              oauth_timestamp: ohauth.timestamp(),
              oauth_nonce: ohauth.nonce()
            };
            if (token) oauth_params.oauth_token = token;
            var all_params = xtend({}, oauth_params, query_params, extra_params),
                base_str = ohauth.baseString(method, base_uri, all_params);
            oauth_params.oauth_signature = ohauth.signature(consumer_secret, token_secret, base_str);
            return 'OAuth ' + ohauth.authHeader(oauth_params);
          };
        };

        var ohauth_1 = ohauth;

        var resolveUrl = createCommonjsModule(function (module, exports) {
          // Copyright 2014 Simon Lydell
          // X11 (“MIT”) Licensed. (See LICENSE.)
          void function (root, factory) {
            {
              module.exports = factory();
            }
          }(commonjsGlobal, function () {
            function resolveUrl()
            /* ...urls */
            {
              var numUrls = arguments.length;

              if (numUrls === 0) {
                throw new Error("resolveUrl requires at least one argument; got none.");
              }

              var base = document.createElement("base");
              base.href = arguments[0];

              if (numUrls === 1) {
                return base.href;
              }

              var head = document.getElementsByTagName("head")[0];
              head.insertBefore(base, head.firstChild);
              var a = document.createElement("a");
              var resolved;

              for (var index = 1; index < numUrls; index++) {
                a.href = arguments[index];
                resolved = a.href;
                base.href = resolved;
              }

              head.removeChild(base);
              return resolved;
            }

            return resolveUrl;
          });
        });

        var assign = make_assign();
        var create$1 = make_create();
        var trim$1 = make_trim();
        var Global$5 = typeof window !== 'undefined' ? window : commonjsGlobal;
        var util = {
          assign: assign,
          create: create$1,
          trim: trim$1,
          bind: bind$1,
          slice: slice$1,
          each: each$7,
          map: map,
          pluck: pluck$1,
          isList: isList$1,
          isFunction: isFunction$1,
          isObject: isObject$1,
          Global: Global$5
        };

        function make_assign() {
          if (Object.assign) {
            return Object.assign;
          } else {
            return function shimAssign(obj, props1, props2, etc) {
              for (var i = 1; i < arguments.length; i++) {
                each$7(Object(arguments[i]), function (val, key) {
                  obj[key] = val;
                });
              }

              return obj;
            };
          }
        }

        function make_create() {
          if (Object.create) {
            return function create(obj, assignProps1, assignProps2, etc) {
              var assignArgsList = slice$1(arguments, 1);
              return assign.apply(this, [Object.create(obj)].concat(assignArgsList));
            };
          } else {
            var F = function F() {}; // eslint-disable-line no-inner-declarations


            return function create(obj, assignProps1, assignProps2, etc) {
              var assignArgsList = slice$1(arguments, 1);
              F.prototype = obj;
              return assign.apply(this, [new F()].concat(assignArgsList));
            };
          }
        }

        function make_trim() {
          if (String.prototype.trim) {
            return function trim(str) {
              return String.prototype.trim.call(str);
            };
          } else {
            return function trim(str) {
              return str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');
            };
          }
        }

        function bind$1(obj, fn) {
          return function () {
            return fn.apply(obj, Array.prototype.slice.call(arguments, 0));
          };
        }

        function slice$1(arr, index) {
          return Array.prototype.slice.call(arr, index || 0);
        }

        function each$7(obj, fn) {
          pluck$1(obj, function (val, key) {
            fn(val, key);
            return false;
          });
        }

        function map(obj, fn) {
          var res = isList$1(obj) ? [] : {};
          pluck$1(obj, function (v, k) {
            res[k] = fn(v, k);
            return false;
          });
          return res;
        }

        function pluck$1(obj, fn) {
          if (isList$1(obj)) {
            for (var i = 0; i < obj.length; i++) {
              if (fn(obj[i], i)) {
                return obj[i];
              }
            }
          } else {
            for (var key in obj) {
              if (obj.hasOwnProperty(key)) {
                if (fn(obj[key], key)) {
                  return obj[key];
                }
              }
            }
          }
        }

        function isList$1(val) {
          return val != null && typeof val != 'function' && typeof val.length == 'number';
        }

        function isFunction$1(val) {
          return val && {}.toString.call(val) === '[object Function]';
        }

        function isObject$1(val) {
          return val && {}.toString.call(val) === '[object Object]';
        }

        var slice = util.slice;
        var pluck = util.pluck;
        var each$6 = util.each;
        var bind = util.bind;
        var create = util.create;
        var isList = util.isList;
        var isFunction = util.isFunction;
        var isObject = util.isObject;
        var storeEngine = {
          createStore: _createStore
        };
        var storeAPI = {
          version: '2.0.12',
          enabled: false,
          // get returns the value of the given key. If that value
          // is undefined, it returns optionalDefaultValue instead.
          get: function get(key, optionalDefaultValue) {
            var data = this.storage.read(this._namespacePrefix + key);
            return this._deserialize(data, optionalDefaultValue);
          },
          // set will store the given value at key and returns value.
          // Calling set with value === undefined is equivalent to calling remove.
          set: function set(key, value) {
            if (value === undefined) {
              return this.remove(key);
            }

            this.storage.write(this._namespacePrefix + key, this._serialize(value));
            return value;
          },
          // remove deletes the key and value stored at the given key.
          remove: function remove(key) {
            this.storage.remove(this._namespacePrefix + key);
          },
          // each will call the given callback once for each key-value pair
          // in this store.
          each: function each(callback) {
            var self = this;
            this.storage.each(function (val, namespacedKey) {
              callback.call(self, self._deserialize(val), (namespacedKey || '').replace(self._namespaceRegexp, ''));
            });
          },
          // clearAll will remove all the stored key-value pairs in this store.
          clearAll: function clearAll() {
            this.storage.clearAll();
          },
          // additional functionality that can't live in plugins
          // ---------------------------------------------------
          // hasNamespace returns true if this store instance has the given namespace.
          hasNamespace: function hasNamespace(namespace) {
            return this._namespacePrefix == '__storejs_' + namespace + '_';
          },
          // createStore creates a store.js instance with the first
          // functioning storage in the list of storage candidates,
          // and applies the the given mixins to the instance.
          createStore: function createStore() {
            return _createStore.apply(this, arguments);
          },
          addPlugin: function addPlugin(plugin) {
            this._addPlugin(plugin);
          },
          namespace: function namespace(_namespace) {
            return _createStore(this.storage, this.plugins, _namespace);
          }
        };

        function _warn() {
          var _console = typeof console == 'undefined' ? null : console;

          if (!_console) {
            return;
          }

          var fn = _console.warn ? _console.warn : _console.log;
          fn.apply(_console, arguments);
        }

        function _createStore(storages, plugins, namespace) {
          if (!namespace) {
            namespace = '';
          }

          if (storages && !isList(storages)) {
            storages = [storages];
          }

          if (plugins && !isList(plugins)) {
            plugins = [plugins];
          }

          var namespacePrefix = namespace ? '__storejs_' + namespace + '_' : '';
          var namespaceRegexp = namespace ? new RegExp('^' + namespacePrefix) : null;
          var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash

          if (!legalNamespaces.test(namespace)) {
            throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes');
          }

          var _privateStoreProps = {
            _namespacePrefix: namespacePrefix,
            _namespaceRegexp: namespaceRegexp,
            _testStorage: function _testStorage(storage) {
              try {
                var testStr = '__storejs__test__';
                storage.write(testStr, testStr);
                var ok = storage.read(testStr) === testStr;
                storage.remove(testStr);
                return ok;
              } catch (e) {
                return false;
              }
            },
            _assignPluginFnProp: function _assignPluginFnProp(pluginFnProp, propName) {
              var oldFn = this[propName];

              this[propName] = function pluginFn() {
                var args = slice(arguments, 0);
                var self = this; // super_fn calls the old function which was overwritten by
                // this mixin.

                function super_fn() {
                  if (!oldFn) {
                    return;
                  }

                  each$6(arguments, function (arg, i) {
                    args[i] = arg;
                  });
                  return oldFn.apply(self, args);
                } // Give mixing function access to super_fn by prefixing all mixin function
                // arguments with super_fn.


                var newFnArgs = [super_fn].concat(args);
                return pluginFnProp.apply(self, newFnArgs);
              };
            },
            _serialize: function _serialize(obj) {
              return JSON.stringify(obj);
            },
            _deserialize: function _deserialize(strVal, defaultVal) {
              if (!strVal) {
                return defaultVal;
              } // It is possible that a raw string value has been previously stored
              // in a storage without using store.js, meaning it will be a raw
              // string value instead of a JSON serialized string. By defaulting
              // to the raw string value in case of a JSON parse error, we allow
              // for past stored values to be forwards-compatible with store.js


              var val = '';

              try {
                val = JSON.parse(strVal);
              } catch (e) {
                val = strVal;
              }

              return val !== undefined ? val : defaultVal;
            },
            _addStorage: function _addStorage(storage) {
              if (this.enabled) {
                return;
              }

              if (this._testStorage(storage)) {
                this.storage = storage;
                this.enabled = true;
              }
            },
            _addPlugin: function _addPlugin(plugin) {
              var self = this; // If the plugin is an array, then add all plugins in the array.
              // This allows for a plugin to depend on other plugins.

              if (isList(plugin)) {
                each$6(plugin, function (plugin) {
                  self._addPlugin(plugin);
                });
                return;
              } // Keep track of all plugins we've seen so far, so that we
              // don't add any of them twice.


              var seenPlugin = pluck(this.plugins, function (seenPlugin) {
                return plugin === seenPlugin;
              });

              if (seenPlugin) {
                return;
              }

              this.plugins.push(plugin); // Check that the plugin is properly formed

              if (!isFunction(plugin)) {
                throw new Error('Plugins must be function values that return objects');
              }

              var pluginProperties = plugin.call(this);

              if (!isObject(pluginProperties)) {
                throw new Error('Plugins must return an object of function properties');
              } // Add the plugin function properties to this store instance.


              each$6(pluginProperties, function (pluginFnProp, propName) {
                if (!isFunction(pluginFnProp)) {
                  throw new Error('Bad plugin property: ' + propName + ' from plugin ' + plugin.name + '. Plugins should only return functions.');
                }

                self._assignPluginFnProp(pluginFnProp, propName);
              });
            },
            // Put deprecated properties in the private API, so as to not expose it to accidential
            // discovery through inspection of the store object.
            // Deprecated: addStorage
            addStorage: function addStorage(storage) {
              _warn('store.addStorage(storage) is deprecated. Use createStore([storages])');

              this._addStorage(storage);
            }
          };
          var store = create(_privateStoreProps, storeAPI, {
            plugins: []
          });
          store.raw = {};
          each$6(store, function (prop, propName) {
            if (isFunction(prop)) {
              store.raw[propName] = bind(store, prop);
            }
          });
          each$6(storages, function (storage) {
            store._addStorage(storage);
          });
          each$6(plugins, function (plugin) {
            store._addPlugin(plugin);
          });
          return store;
        }

        var Global$4 = util.Global;
        var localStorage_1 = {
          name: 'localStorage',
          read: read$5,
          write: write$5,
          each: each$5,
          remove: remove$5,
          clearAll: clearAll$5
        };

        function localStorage$1() {
          return Global$4.localStorage;
        }

        function read$5(key) {
          return localStorage$1().getItem(key);
        }

        function write$5(key, data) {
          return localStorage$1().setItem(key, data);
        }

        function each$5(fn) {
          for (var i = localStorage$1().length - 1; i >= 0; i--) {
            var key = localStorage$1().key(i);
            fn(read$5(key), key);
          }
        }

        function remove$5(key) {
          return localStorage$1().removeItem(key);
        }

        function clearAll$5() {
          return localStorage$1().clear();
        }

        // versions 6 and 7, where no localStorage, etc
        // is available.

        var Global$3 = util.Global;
        var oldFFGlobalStorage = {
          name: 'oldFF-globalStorage',
          read: read$4,
          write: write$4,
          each: each$4,
          remove: remove$4,
          clearAll: clearAll$4
        };
        var globalStorage = Global$3.globalStorage;

        function read$4(key) {
          return globalStorage[key];
        }

        function write$4(key, data) {
          globalStorage[key] = data;
        }

        function each$4(fn) {
          for (var i = globalStorage.length - 1; i >= 0; i--) {
            var key = globalStorage.key(i);
            fn(globalStorage[key], key);
          }
        }

        function remove$4(key) {
          return globalStorage.removeItem(key);
        }

        function clearAll$4() {
          each$4(function (key, _) {
            delete globalStorage[key];
          });
        }

        // versions 6 and 7, where no localStorage, sessionStorage, etc
        // is available.

        var Global$2 = util.Global;
        var oldIEUserDataStorage = {
          name: 'oldIE-userDataStorage',
          write: write$3,
          read: read$3,
          each: each$3,
          remove: remove$3,
          clearAll: clearAll$3
        };
        var storageName = 'storejs';
        var doc$1 = Global$2.document;

        var _withStorageEl = _makeIEStorageElFunction();

        var disable = (Global$2.navigator ? Global$2.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x

        function write$3(unfixedKey, data) {
          if (disable) {
            return;
          }

          var fixedKey = fixKey(unfixedKey);

          _withStorageEl(function (storageEl) {
            storageEl.setAttribute(fixedKey, data);
            storageEl.save(storageName);
          });
        }

        function read$3(unfixedKey) {
          if (disable) {
            return;
          }

          var fixedKey = fixKey(unfixedKey);
          var res = null;

          _withStorageEl(function (storageEl) {
            res = storageEl.getAttribute(fixedKey);
          });

          return res;
        }

        function each$3(callback) {
          _withStorageEl(function (storageEl) {
            var attributes = storageEl.XMLDocument.documentElement.attributes;

            for (var i = attributes.length - 1; i >= 0; i--) {
              var attr = attributes[i];
              callback(storageEl.getAttribute(attr.name), attr.name);
            }
          });
        }

        function remove$3(unfixedKey) {
          var fixedKey = fixKey(unfixedKey);

          _withStorageEl(function (storageEl) {
            storageEl.removeAttribute(fixedKey);
            storageEl.save(storageName);
          });
        }

        function clearAll$3() {
          _withStorageEl(function (storageEl) {
            var attributes = storageEl.XMLDocument.documentElement.attributes;
            storageEl.load(storageName);

            for (var i = attributes.length - 1; i >= 0; i--) {
              storageEl.removeAttribute(attributes[i].name);
            }

            storageEl.save(storageName);
          });
        } // Helpers
        //////////
        // In IE7, keys cannot start with a digit or contain certain chars.
        // See https://github.com/marcuswestin/store.js/issues/40
        // See https://github.com/marcuswestin/store.js/issues/83


        var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");

        function fixKey(key) {
          return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___');
        }

        function _makeIEStorageElFunction() {
          if (!doc$1 || !doc$1.documentElement || !doc$1.documentElement.addBehavior) {
            return null;
          }

          var scriptTag = 'script',
              storageOwner,
              storageContainer,
              storageEl; // Since #userData storage applies only to specific paths, we need to
          // somehow link our data to a specific path.  We choose /favicon.ico
          // as a pretty safe option, since all browsers already make a request to
          // this URL anyway and being a 404 will not hurt us here.  We wrap an
          // iframe pointing to the favicon in an ActiveXObject(htmlfile) object
          // (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
          // since the iframe access rules appear to allow direct access and
          // manipulation of the document element, even for a 404 page.  This
          // document can be used instead of the current document (which would
          // have been limited to the current path) to perform #userData storage.

          try {
            /* global ActiveXObject */
            storageContainer = new ActiveXObject('htmlfile');
            storageContainer.open();
            storageContainer.write('<' + scriptTag + '>document.w=window</' + scriptTag + '><iframe src="/favicon.ico"></iframe>');
            storageContainer.close();
            storageOwner = storageContainer.w.frames[0].document;
            storageEl = storageOwner.createElement('div');
          } catch (e) {
            // somehow ActiveXObject instantiation failed (perhaps some special
            // security settings or otherwse), fall back to per-path storage
            storageEl = doc$1.createElement('div');
            storageOwner = doc$1.body;
          }

          return function (storeFunction) {
            var args = [].slice.call(arguments, 0);
            args.unshift(storageEl); // See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
            // and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx

            storageOwner.appendChild(storageEl);
            storageEl.addBehavior('#default#userData');
            storageEl.load(storageName);
            storeFunction.apply(this, args);
            storageOwner.removeChild(storageEl);
            return;
          };
        }

        // doesn't work but cookies do. This implementation is adopted from
        // https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage

        var Global$1 = util.Global;
        var trim = util.trim;
        var cookieStorage = {
          name: 'cookieStorage',
          read: read$2,
          write: write$2,
          each: each$2,
          remove: remove$2,
          clearAll: clearAll$2
        };
        var doc = Global$1.document;

        function read$2(key) {
          if (!key || !_has(key)) {
            return null;
          }

          var regexpStr = "(?:^|.*;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
          return unescape(doc.cookie.replace(new RegExp(regexpStr), "$1"));
        }

        function each$2(callback) {
          var cookies = doc.cookie.split(/; ?/g);

          for (var i = cookies.length - 1; i >= 0; i--) {
            if (!trim(cookies[i])) {
              continue;
            }

            var kvp = cookies[i].split('=');
            var key = unescape(kvp[0]);
            var val = unescape(kvp[1]);
            callback(val, key);
          }
        }

        function write$2(key, data) {
          if (!key) {
            return;
          }

          doc.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
        }

        function remove$2(key) {
          if (!key || !_has(key)) {
            return;
          }

          doc.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
        }

        function clearAll$2() {
          each$2(function (_, key) {
            remove$2(key);
          });
        }

        function _has(key) {
          return new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=").test(doc.cookie);
        }

        var Global = util.Global;
        var sessionStorage_1 = {
          name: 'sessionStorage',
          read: read$1,
          write: write$1,
          each: each$1,
          remove: remove$1,
          clearAll: clearAll$1
        };

        function sessionStorage() {
          return Global.sessionStorage;
        }

        function read$1(key) {
          return sessionStorage().getItem(key);
        }

        function write$1(key, data) {
          return sessionStorage().setItem(key, data);
        }

        function each$1(fn) {
          for (var i = sessionStorage().length - 1; i >= 0; i--) {
            var key = sessionStorage().key(i);
            fn(read$1(key), key);
          }
        }

        function remove$1(key) {
          return sessionStorage().removeItem(key);
        }

        function clearAll$1() {
          return sessionStorage().clear();
        }

        // memoryStorage is a useful last fallback to ensure that the store
        // is functions (meaning store.get(), store.set(), etc will all function).
        // However, stored values will not persist when the browser navigates to
        // a new page or reloads the current page.
        var memoryStorage_1 = {
          name: 'memoryStorage',
          read: read,
          write: write,
          each: each,
          remove: remove,
          clearAll: clearAll
        };
        var memoryStorage = {};

        function read(key) {
          return memoryStorage[key];
        }

        function write(key, data) {
          memoryStorage[key] = data;
        }

        function each(callback) {
          for (var key in memoryStorage) {
            if (memoryStorage.hasOwnProperty(key)) {
              callback(memoryStorage[key], key);
            }
          }
        }

        function remove(key) {
          delete memoryStorage[key];
        }

        function clearAll(key) {
          memoryStorage = {};
        }

        var all = [// Listed in order of usage preference
        localStorage_1, oldFFGlobalStorage, oldIEUserDataStorage, cookieStorage, sessionStorage_1, memoryStorage_1];

        /* eslint-disable */
        //  json2.js
        //  2016-10-28
        //  Public Domain.
        //  NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
        //  See http://www.JSON.org/js.html
        //  This code should be minified before deployment.
        //  See http://javascript.crockford.com/jsmin.html
        //  USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
        //  NOT CONTROL.
        //  This file creates a global JSON object containing two methods: stringify
        //  and parse. This file provides the ES5 JSON capability to ES3 systems.
        //  If a project might run on IE8 or earlier, then this file should be included.
        //  This file does nothing on ES5 systems.
        //      JSON.stringify(value, replacer, space)
        //          value       any JavaScript value, usually an object or array.
        //          replacer    an optional parameter that determines how object
        //                      values are stringified for objects. It can be a
        //                      function or an array of strings.
        //          space       an optional parameter that specifies the indentation
        //                      of nested structures. If it is omitted, the text will
        //                      be packed without extra whitespace. If it is a number,
        //                      it will specify the number of spaces to indent at each
        //                      level. If it is a string (such as "\t" or "&nbsp;"),
        //                      it contains the characters used to indent at each level.
        //          This method produces a JSON text from a JavaScript value.
        //          When an object value is found, if the object contains a toJSON
        //          method, its toJSON method will be called and the result will be
        //          stringified. A toJSON method does not serialize: it returns the
        //          value represented by the name/value pair that should be serialized,
        //          or undefined if nothing should be serialized. The toJSON method
        //          will be passed the key associated with the value, and this will be
        //          bound to the value.
        //          For example, this would serialize Dates as ISO strings.
        //              Date.prototype.toJSON = function (key) {
        //                  function f(n) {
        //                      // Format integers to have at least two digits.
        //                      return (n < 10)
        //                          ? "0" + n
        //                          : n;
        //                  }
        //                  return this.getUTCFullYear()   + "-" +
        //                       f(this.getUTCMonth() + 1) + "-" +
        //                       f(this.getUTCDate())      + "T" +
        //                       f(this.getUTCHours())     + ":" +
        //                       f(this.getUTCMinutes())   + ":" +
        //                       f(this.getUTCSeconds())   + "Z";
        //              };
        //          You can provide an optional replacer method. It will be passed the
        //          key and value of each member, with this bound to the containing
        //          object. The value that is returned from your method will be
        //          serialized. If your method returns undefined, then the member will
        //          be excluded from the serialization.
        //          If the replacer parameter is an array of strings, then it will be
        //          used to select the members to be serialized. It filters the results
        //          such that only members with keys listed in the replacer array are
        //          stringified.
        //          Values that do not have JSON representations, such as undefined or
        //          functions, will not be serialized. Such values in objects will be
        //          dropped; in arrays they will be replaced with null. You can use
        //          a replacer function to replace those with JSON values.
        //          JSON.stringify(undefined) returns undefined.
        //          The optional space parameter produces a stringification of the
        //          value that is filled with line breaks and indentation to make it
        //          easier to read.
        //          If the space parameter is a non-empty string, then that string will
        //          be used for indentation. If the space parameter is a number, then
        //          the indentation will be that many spaces.
        //          Example:
        //          text = JSON.stringify(["e", {pluribus: "unum"}]);
        //          // text is '["e",{"pluribus":"unum"}]'
        //          text = JSON.stringify(["e", {pluribus: "unum"}], null, "\t");
        //          // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
        //          text = JSON.stringify([new Date()], function (key, value) {
        //              return this[key] instanceof Date
        //                  ? "Date(" + this[key] + ")"
        //                  : value;
        //          });
        //          // text is '["Date(---current time---)"]'
        //      JSON.parse(text, reviver)
        //          This method parses a JSON text to produce an object or array.
        //          It can throw a SyntaxError exception.
        //          The optional reviver parameter is a function that can filter and
        //          transform the results. It receives each of the keys and values,
        //          and its return value is used instead of the original value.
        //          If it returns what it received, then the structure is not modified.
        //          If it returns undefined then the member is deleted.
        //          Example:
        //          // Parse the text. Values that look like ISO date strings will
        //          // be converted to Date objects.
        //          myData = JSON.parse(text, function (key, value) {
        //              var a;
        //              if (typeof value === "string") {
        //                  a =
        //   /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
        //                  if (a) {
        //                      return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
        //                          +a[5], +a[6]));
        //                  }
        //              }
        //              return value;
        //          });
        //          myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
        //              var d;
        //              if (typeof value === "string" &&
        //                      value.slice(0, 5) === "Date(" &&
        //                      value.slice(-1) === ")") {
        //                  d = new Date(value.slice(5, -1));
        //                  if (d) {
        //                      return d;
        //                  }
        //              }
        //              return value;
        //          });
        //  This is a reference implementation. You are free to copy, modify, or
        //  redistribute.

        /*jslint
            eval, for, this
        */

        /*property
            JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
            getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
            lastIndex, length, parse, prototype, push, replace, slice, stringify,
            test, toJSON, toString, valueOf
        */
        // Create a JSON object only if one does not already exist. We create the
        // methods in a closure to avoid creating global variables.
        if ((typeof JSON === "undefined" ? "undefined" : _typeof(JSON)) !== "object") {
          JSON = {};
        }

        (function () {

          var rx_one = /^[\],:{}\s]*$/;
          var rx_two = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
          var rx_three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
          var rx_four = /(?:^|:|,)(?:\s*\[)+/g;
          var rx_escapable = /[\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
          var rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;

          function f(n) {
            // Format integers to have at least two digits.
            return n < 10 ? "0" + n : n;
          }

          function this_value() {
            return this.valueOf();
          }

          if (typeof Date.prototype.toJSON !== "function") {
            Date.prototype.toJSON = function () {
              return isFinite(this.valueOf()) ? this.getUTCFullYear() + "-" + f(this.getUTCMonth() + 1) + "-" + f(this.getUTCDate()) + "T" + f(this.getUTCHours()) + ":" + f(this.getUTCMinutes()) + ":" + f(this.getUTCSeconds()) + "Z" : null;
            };

            Boolean.prototype.toJSON = this_value;
            Number.prototype.toJSON = this_value;
            String.prototype.toJSON = this_value;
          }

          var gap;
          var indent;
          var meta;
          var rep;

          function quote(string) {
            // If the string contains no control characters, no quote characters, and no
            // backslash characters, then we can safely slap some quotes around it.
            // Otherwise we must also replace the offending characters with safe escape
            // sequences.
            rx_escapable.lastIndex = 0;
            return rx_escapable.test(string) ? "\"" + string.replace(rx_escapable, function (a) {
              var c = meta[a];
              return typeof c === "string" ? c : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
            }) + "\"" : "\"" + string + "\"";
          }

          function str(key, holder) {
            // Produce a string from holder[key].
            var i; // The loop counter.

            var k; // The member key.

            var v; // The member value.

            var length;
            var mind = gap;
            var partial;
            var value = holder[key]; // If the value has a toJSON method, call it to obtain a replacement value.

            if (value && _typeof(value) === "object" && typeof value.toJSON === "function") {
              value = value.toJSON(key);
            } // If we were called with a replacer function, then call the replacer to
            // obtain a replacement value.


            if (typeof rep === "function") {
              value = rep.call(holder, key, value);
            } // What happens next depends on the value's type.


            switch (_typeof(value)) {
              case "string":
                return quote(value);

              case "number":
                // JSON numbers must be finite. Encode non-finite numbers as null.
                return isFinite(value) ? String(value) : "null";

              case "boolean":
              case "null":
                // If the value is a boolean or null, convert it to a string. Note:
                // typeof null does not produce "null". The case is included here in
                // the remote chance that this gets fixed someday.
                return String(value);
              // If the type is "object", we might be dealing with an object or an array or
              // null.

              case "object":
                // Due to a specification blunder in ECMAScript, typeof null is "object",
                // so watch out for that case.
                if (!value) {
                  return "null";
                } // Make an array to hold the partial results of stringifying this object value.


                gap += indent;
                partial = []; // Is the value an array?

                if (Object.prototype.toString.apply(value) === "[object Array]") {
                  // The value is an array. Stringify every element. Use null as a placeholder
                  // for non-JSON values.
                  length = value.length;

                  for (i = 0; i < length; i += 1) {
                    partial[i] = str(i, value) || "null";
                  } // Join all of the elements together, separated with commas, and wrap them in
                  // brackets.


                  v = partial.length === 0 ? "[]" : gap ? "[\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "]" : "[" + partial.join(",") + "]";
                  gap = mind;
                  return v;
                } // If the replacer is an array, use it to select the members to be stringified.


                if (rep && _typeof(rep) === "object") {
                  length = rep.length;

                  for (i = 0; i < length; i += 1) {
                    if (typeof rep[i] === "string") {
                      k = rep[i];
                      v = str(k, value);

                      if (v) {
                        partial.push(quote(k) + (gap ? ": " : ":") + v);
                      }
                    }
                  }
                } else {
                  // Otherwise, iterate through all of the keys in the object.
                  for (k in value) {
                    if (Object.prototype.hasOwnProperty.call(value, k)) {
                      v = str(k, value);

                      if (v) {
                        partial.push(quote(k) + (gap ? ": " : ":") + v);
                      }
                    }
                  }
                } // Join all of the member texts together, separated with commas,
                // and wrap them in braces.


                v = partial.length === 0 ? "{}" : gap ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}" : "{" + partial.join(",") + "}";
                gap = mind;
                return v;
            }
          } // If the JSON object does not yet have a stringify method, give it one.


          if (typeof JSON.stringify !== "function") {
            meta = {
              // table of character substitutions
              "\b": "\\b",
              "\t": "\\t",
              "\n": "\\n",
              "\f": "\\f",
              "\r": "\\r",
              "\"": "\\\"",
              "\\": "\\\\"
            };

            JSON.stringify = function (value, replacer, space) {
              // The stringify method takes a value and an optional replacer, and an optional
              // space parameter, and returns a JSON text. The replacer can be a function
              // that can replace values, or an array of strings that will select the keys.
              // A default replacer method can be provided. Use of the space parameter can
              // produce text that is more easily readable.
              var i;
              gap = "";
              indent = ""; // If the space parameter is a number, make an indent string containing that
              // many spaces.

              if (typeof space === "number") {
                for (i = 0; i < space; i += 1) {
                  indent += " ";
                } // If the space parameter is a string, it will be used as the indent string.

              } else if (typeof space === "string") {
                indent = space;
              } // If there is a replacer, it must be a function or an array.
              // Otherwise, throw an error.


              rep = replacer;

              if (replacer && typeof replacer !== "function" && (_typeof(replacer) !== "object" || typeof replacer.length !== "number")) {
                throw new Error("JSON.stringify");
              } // Make a fake root object containing our value under the key of "".
              // Return the result of stringifying the value.


              return str("", {
                "": value
              });
            };
          } // If the JSON object does not yet have a parse method, give it one.


          if (typeof JSON.parse !== "function") {
            JSON.parse = function (text, reviver) {
              // The parse method takes a text and an optional reviver function, and returns
              // a JavaScript value if the text is a valid JSON text.
              var j;

              function walk(holder, key) {
                // The walk method is used to recursively walk the resulting structure so
                // that modifications can be made.
                var k;
                var v;
                var value = holder[key];

                if (value && _typeof(value) === "object") {
                  for (k in value) {
                    if (Object.prototype.hasOwnProperty.call(value, k)) {
                      v = walk(value, k);

                      if (v !== undefined) {
                        value[k] = v;
                      } else {
                        delete value[k];
                      }
                    }
                  }
                }

                return reviver.call(holder, key, value);
              } // Parsing happens in four stages. In the first stage, we replace certain
              // Unicode characters with escape sequences. JavaScript handles many characters
              // incorrectly, either silently deleting them, or treating them as line endings.


              text = String(text);
              rx_dangerous.lastIndex = 0;

              if (rx_dangerous.test(text)) {
                text = text.replace(rx_dangerous, function (a) {
                  return "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
                });
              } // In the second stage, we run the text against regular expressions that look
              // for non-JSON patterns. We are especially concerned with "()" and "new"
              // because they can cause invocation, and "=" because it can cause mutation.
              // But just to be safe, we want to reject all unexpected forms.
              // We split the second stage into 4 regexp operations in order to work around
              // crippling inefficiencies in IE's and Safari's regexp engines. First we
              // replace the JSON backslash pairs with "@" (a non-JSON character). Second, we
              // replace all simple value tokens with "]" characters. Third, we delete all
              // open brackets that follow a colon or comma or that begin the text. Finally,
              // we look to see that the remaining characters are only whitespace or "]" or
              // "," or ":" or "{" or "}". If that is so, then the text is safe for eval.


              if (rx_one.test(text.replace(rx_two, "@").replace(rx_three, "]").replace(rx_four, ""))) {
                // In the third stage we use the eval function to compile the text into a
                // JavaScript structure. The "{" operator is subject to a syntactic ambiguity
                // in JavaScript: it can begin a block or an object literal. We wrap the text
                // in parens to eliminate the ambiguity.
                j = eval("(" + text + ")"); // In the optional fourth stage, we recursively walk the new structure, passing
                // each name/value pair to a reviver function for possible transformation.

                return typeof reviver === "function" ? walk({
                  "": j
                }, "") : j;
              } // If the text is not JSON parseable, then a SyntaxError is thrown.


              throw new SyntaxError("JSON.parse");
            };
          }
        })();

        var json2 = json2Plugin;

        function json2Plugin() {
          return {};
        }

        var plugins = [json2];
        var store_legacy = storeEngine.createStore(all, plugins);

        var immutable = extend;
        var hasOwnProperty = Object.prototype.hasOwnProperty;

        function extend() {
          var target = {};

          for (var i = 0; i < arguments.length; i++) {
            var source = arguments[i];

            for (var key in source) {
              if (hasOwnProperty.call(source, key)) {
                target[key] = source[key];
              }
            }
          }

          return target;
        }

        //
        // This code is only compatible with IE10+ because the [XDomainRequest](http://bit.ly/LfO7xo)
        // object, IE<10's idea of [CORS](http://en.wikipedia.org/wiki/Cross-origin_resource_sharing),
        // does not support custom headers, which this uses everywhere.


        var osmAuth = function osmAuth(o) {
          var oauth = {}; // authenticated users will also have a request token secret, but it's
          // not used in transactions with the server

          oauth.authenticated = function () {
            return !!(token('oauth_token') && token('oauth_token_secret'));
          };

          oauth.logout = function () {
            token('oauth_token', '');
            token('oauth_token_secret', '');
            token('oauth_request_token_secret', '');
            return oauth;
          }; // TODO: detect lack of click event


          oauth.authenticate = function (callback) {
            if (oauth.authenticated()) return callback();
            oauth.logout(); // ## Getting a request token

            var params = timenonce(getAuth(o)),
                url = o.url + '/oauth/request_token';
            params.oauth_signature = ohauth_1.signature(o.oauth_secret, '', ohauth_1.baseString('POST', url, params));

            if (!o.singlepage) {
              // Create a 600x550 popup window in the center of the screen
              var w = 600,
                  h = 550,
                  settings = [['width', w], ['height', h], ['left', screen.width / 2 - w / 2], ['top', screen.height / 2 - h / 2]].map(function (x) {
                return x.join('=');
              }).join(','),
                  popup = window.open('about:blank', 'oauth_window', settings);
              oauth.popupWindow = popup;

              if (!popup) {
                var error = new Error('Popup was blocked');
                error.status = 'popup-blocked';
                throw error;
              }
            } // Request a request token. When this is complete, the popup
            // window is redirected to OSM's authorization page.


            ohauth_1.xhr('POST', url, params, null, {}, reqTokenDone);
            o.loading();

            function reqTokenDone(err, xhr) {
              o.done();
              if (err) return callback(err);
              var resp = ohauth_1.stringQs(xhr.response);
              token('oauth_request_token_secret', resp.oauth_token_secret);
              var authorize_url = o.url + '/oauth/authorize?' + ohauth_1.qsString({
                oauth_token: resp.oauth_token,
                oauth_callback: resolveUrl(o.landing)
              });

              if (o.singlepage) {
                location.href = authorize_url;
              } else {
                popup.location = authorize_url;
              }
            } // Called by a function in a landing page, in the popup window. The
            // window closes itself.


            window.authComplete = function (token) {
              var oauth_token = ohauth_1.stringQs(token.split('?')[1]);
              get_access_token(oauth_token.oauth_token);
              delete window.authComplete;
            }; // ## Getting an request token
            //
            // At this point we have an `oauth_token`, brought in from a function
            // call on a landing page popup.


            function get_access_token(oauth_token) {
              var url = o.url + '/oauth/access_token',
                  params = timenonce(getAuth(o)),
                  request_token_secret = token('oauth_request_token_secret');
              params.oauth_token = oauth_token;
              params.oauth_signature = ohauth_1.signature(o.oauth_secret, request_token_secret, ohauth_1.baseString('POST', url, params)); // ## Getting an access token
              //
              // The final token required for authentication. At this point
              // we have a `request token secret`

              ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
              o.loading();
            }

            function accessTokenDone(err, xhr) {
              o.done();
              if (err) return callback(err);
              var access_token = ohauth_1.stringQs(xhr.response);
              token('oauth_token', access_token.oauth_token);
              token('oauth_token_secret', access_token.oauth_token_secret);
              callback(null, oauth);
            }
          };

          oauth.bringPopupWindowToFront = function () {
            var brougtPopupToFront = false;

            try {
              // This may cause a cross-origin error:
              // `DOMException: Blocked a frame with origin "..." from accessing a cross-origin frame.`
              if (oauth.popupWindow && !oauth.popupWindow.closed) {
                oauth.popupWindow.focus();
                brougtPopupToFront = true;
              }
            } catch (err) {// Bringing popup window to front failed (probably because of the cross-origin error mentioned above)
            }

            return brougtPopupToFront;
          };

          oauth.bootstrapToken = function (oauth_token, callback) {
            // ## Getting an request token
            // At this point we have an `oauth_token`, brought in from a function
            // call on a landing page popup.
            function get_access_token(oauth_token) {
              var url = o.url + '/oauth/access_token',
                  params = timenonce(getAuth(o)),
                  request_token_secret = token('oauth_request_token_secret');
              params.oauth_token = oauth_token;
              params.oauth_signature = ohauth_1.signature(o.oauth_secret, request_token_secret, ohauth_1.baseString('POST', url, params)); // ## Getting an access token
              // The final token required for authentication. At this point
              // we have a `request token secret`

              ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
              o.loading();
            }

            function accessTokenDone(err, xhr) {
              o.done();
              if (err) return callback(err);
              var access_token = ohauth_1.stringQs(xhr.response);
              token('oauth_token', access_token.oauth_token);
              token('oauth_token_secret', access_token.oauth_token_secret);
              callback(null, oauth);
            }

            get_access_token(oauth_token);
          }; // # xhr
          //
          // A single XMLHttpRequest wrapper that does authenticated calls if the
          // user has logged in.


          oauth.xhr = function (options, callback) {
            if (!oauth.authenticated()) {
              if (o.auto) {
                return oauth.authenticate(run);
              } else {
                callback('not authenticated', null);
                return;
              }
            } else {
              return run();
            }

            function run() {
              var params = timenonce(getAuth(o)),
                  oauth_token_secret = token('oauth_token_secret'),
                  url = options.prefix !== false ? o.url + options.path : options.path,
                  url_parts = url.replace(/#.*$/, '').split('?', 2),
                  base_url = url_parts[0],
                  query = url_parts.length === 2 ? url_parts[1] : ''; // https://tools.ietf.org/html/rfc5849#section-3.4.1.3.1

              if ((!options.options || !options.options.header || options.options.header['Content-Type'] === 'application/x-www-form-urlencoded') && options.content) {
                params = immutable(params, ohauth_1.stringQs(options.content));
              }

              params.oauth_token = token('oauth_token');
              params.oauth_signature = ohauth_1.signature(o.oauth_secret, oauth_token_secret, ohauth_1.baseString(options.method, base_url, immutable(params, ohauth_1.stringQs(query))));
              return ohauth_1.xhr(options.method, url, params, options.content, options.options, done);
            }

            function done(err, xhr) {
              if (err) return callback(err);else if (xhr.responseXML) return callback(err, xhr.responseXML);else return callback(err, xhr.response);
            }
          }; // pre-authorize this object, if we can just get a token and token_secret
          // from the start


          oauth.preauth = function (c) {
            if (!c) return;
            if (c.oauth_token) token('oauth_token', c.oauth_token);
            if (c.oauth_token_secret) token('oauth_token_secret', c.oauth_token_secret);
            return oauth;
          };

          oauth.options = function (_) {
            if (!arguments.length) return o;
            o = _;
            o.url = o.url || 'https://www.openstreetmap.org';
            o.landing = o.landing || 'land.html';
            o.singlepage = o.singlepage || false; // Optional loading and loading-done functions for nice UI feedback.
            // by default, no-ops

            o.loading = o.loading || function () {};

            o.done = o.done || function () {};

            return oauth.preauth(o);
          }; // 'stamp' an authentication object from `getAuth()`
          // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
          // and timestamp


          function timenonce(o) {
            o.oauth_timestamp = ohauth_1.timestamp();
            o.oauth_nonce = ohauth_1.nonce();
            return o;
          } // get/set tokens. These are prefixed with the base URL so that `osm-auth`
          // can be used with multiple APIs and the keys in `localStorage`
          // will not clash


          var token;

          if (store_legacy.enabled) {
            token = function token(x, y) {
              if (arguments.length === 1) return store_legacy.get(o.url + x);else if (arguments.length === 2) return store_legacy.set(o.url + x, y);
            };
          } else {
            var storage = {};

            token = function token(x, y) {
              if (arguments.length === 1) return storage[o.url + x];else if (arguments.length === 2) return storage[o.url + x] = y;
            };
          } // Get an authentication object. If you just add and remove properties
          // from a single object, you'll need to use `delete` to make sure that
          // it doesn't contain undesired properties for authentication


          function getAuth(o) {
            return {
              oauth_consumer_key: o.oauth_consumer_key,
              oauth_signature_method: 'HMAC-SHA1'
            };
          } // potentially pre-authorize


          oauth.options(o);
          return oauth;
        };

        var tiler$2 = utilTiler();
        var dispatch$2 = dispatch$8('apiStatusChange', 'authLoading', 'authDone', 'change', 'loading', 'loaded', 'loadedNotes');
        var urlroot = 'https://www.openstreetmap.org';
        var oauth = osmAuth({
          url: urlroot,
          oauth_consumer_key: '5A043yRSEugj4DJ5TljuapfnrflWDte8jTOcWLlT',
          oauth_secret: 'aB3jKq1TRsCOUrfOIZ6oQMEDmv2ptV76PA54NGLL',
          loading: authLoading,
          done: authDone
        }); // hardcode default block of Google Maps

        var _imageryBlocklists = [/.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/];
        var _tileCache = {
          toLoad: {},
          loaded: {},
          inflight: {},
          seen: {},
          rtree: new RBush()
        };
        var _noteCache = {
          toLoad: {},
          loaded: {},
          inflight: {},
          inflightPost: {},
          note: {},
          closed: {},
          rtree: new RBush()
        };
        var _userCache = {
          toLoad: {},
          user: {}
        };

        var _cachedApiStatus;

        var _changeset = {};

        var _deferred = new Set();

        var _connectionID = 1;
        var _tileZoom = 16;
        var _noteZoom = 12;

        var _rateLimitError;

        var _userChangesets;

        var _userDetails;

        var _off; // set a default but also load this from the API status


        var _maxWayNodes = 2000;

        function authLoading() {
          dispatch$2.call('authLoading');
        }

        function authDone() {
          dispatch$2.call('authDone');
        }

        function abortRequest$2(controllerOrXHR) {
          if (controllerOrXHR) {
            controllerOrXHR.abort();
          }
        }

        function hasInflightRequests(cache) {
          return Object.keys(cache.inflight).length;
        }

        function abortUnwantedRequests(cache, visibleTiles) {
          Object.keys(cache.inflight).forEach(function (k) {
            if (cache.toLoad[k]) return;
            if (visibleTiles.find(function (tile) {
              return k === tile.id;
            })) return;
            abortRequest$2(cache.inflight[k]);
            delete cache.inflight[k];
          });
        }

        function getLoc(attrs) {
          var lon = attrs.lon && attrs.lon.value;
          var lat = attrs.lat && attrs.lat.value;
          return [parseFloat(lon), parseFloat(lat)];
        }

        function getNodes(obj) {
          var elems = obj.getElementsByTagName('nd');
          var nodes = new Array(elems.length);

          for (var i = 0, l = elems.length; i < l; i++) {
            nodes[i] = 'n' + elems[i].attributes.ref.value;
          }

          return nodes;
        }

        function getNodesJSON(obj) {
          var elems = obj.nodes;
          var nodes = new Array(elems.length);

          for (var i = 0, l = elems.length; i < l; i++) {
            nodes[i] = 'n' + elems[i];
          }

          return nodes;
        }

        function getTags(obj) {
          var elems = obj.getElementsByTagName('tag');
          var tags = {};

          for (var i = 0, l = elems.length; i < l; i++) {
            var attrs = elems[i].attributes;
            tags[attrs.k.value] = attrs.v.value;
          }

          return tags;
        }

        function getMembers(obj) {
          var elems = obj.getElementsByTagName('member');
          var members = new Array(elems.length);

          for (var i = 0, l = elems.length; i < l; i++) {
            var attrs = elems[i].attributes;
            members[i] = {
              id: attrs.type.value[0] + attrs.ref.value,
              type: attrs.type.value,
              role: attrs.role.value
            };
          }

          return members;
        }

        function getMembersJSON(obj) {
          var elems = obj.members;
          var members = new Array(elems.length);

          for (var i = 0, l = elems.length; i < l; i++) {
            var attrs = elems[i];
            members[i] = {
              id: attrs.type[0] + attrs.ref,
              type: attrs.type,
              role: attrs.role
            };
          }

          return members;
        }

        function getVisible(attrs) {
          return !attrs.visible || attrs.visible.value !== 'false';
        }

        function parseComments(comments) {
          var parsedComments = []; // for each comment

          for (var i = 0; i < comments.length; i++) {
            var comment = comments[i];

            if (comment.nodeName === 'comment') {
              var childNodes = comment.childNodes;
              var parsedComment = {};

              for (var j = 0; j < childNodes.length; j++) {
                var node = childNodes[j];
                var nodeName = node.nodeName;
                if (nodeName === '#text') continue;
                parsedComment[nodeName] = node.textContent;

                if (nodeName === 'uid') {
                  var uid = node.textContent;

                  if (uid && !_userCache.user[uid]) {
                    _userCache.toLoad[uid] = true;
                  }
                }
              }

              if (parsedComment) {
                parsedComments.push(parsedComment);
              }
            }
          }

          return parsedComments;
        }

        function encodeNoteRtree(note) {
          return {
            minX: note.loc[0],
            minY: note.loc[1],
            maxX: note.loc[0],
            maxY: note.loc[1],
            data: note
          };
        }

        var jsonparsers = {
          node: function nodeData(obj, uid) {
            return new osmNode({
              id: uid,
              visible: typeof obj.visible === 'boolean' ? obj.visible : true,
              version: obj.version && obj.version.toString(),
              changeset: obj.changeset && obj.changeset.toString(),
              timestamp: obj.timestamp,
              user: obj.user,
              uid: obj.uid && obj.uid.toString(),
              loc: [parseFloat(obj.lon), parseFloat(obj.lat)],
              tags: obj.tags
            });
          },
          way: function wayData(obj, uid) {
            return new osmWay({
              id: uid,
              visible: typeof obj.visible === 'boolean' ? obj.visible : true,
              version: obj.version && obj.version.toString(),
              changeset: obj.changeset && obj.changeset.toString(),
              timestamp: obj.timestamp,
              user: obj.user,
              uid: obj.uid && obj.uid.toString(),
              tags: obj.tags,
              nodes: getNodesJSON(obj)
            });
          },
          relation: function relationData(obj, uid) {
            return new osmRelation({
              id: uid,
              visible: typeof obj.visible === 'boolean' ? obj.visible : true,
              version: obj.version && obj.version.toString(),
              changeset: obj.changeset && obj.changeset.toString(),
              timestamp: obj.timestamp,
              user: obj.user,
              uid: obj.uid && obj.uid.toString(),
              tags: obj.tags,
              members: getMembersJSON(obj)
            });
          },
          user: function parseUser(obj, uid) {
            return {
              id: uid,
              display_name: obj.display_name,
              account_created: obj.account_created,
              image_url: obj.img && obj.img.href,
              changesets_count: obj.changesets && obj.changesets.count && obj.changesets.count.toString() || '0',
              active_blocks: obj.blocks && obj.blocks.received && obj.blocks.received.active && obj.blocks.received.active.toString() || '0'
            };
          }
        };

        function parseJSON(payload, callback, options) {
          options = Object.assign({
            skipSeen: true
          }, options);

          if (!payload) {
            return callback({
              message: 'No JSON',
              status: -1
            });
          }

          var json = payload;
          if (_typeof(json) !== 'object') json = JSON.parse(payload);
          if (!json.elements) return callback({
            message: 'No JSON',
            status: -1
          });
          var children = json.elements;
          var handle = window.requestIdleCallback(function () {
            _deferred["delete"](handle);

            var results = [];
            var result;

            for (var i = 0; i < children.length; i++) {
              result = parseChild(children[i]);
              if (result) results.push(result);
            }

            callback(null, results);
          });

          _deferred.add(handle);

          function parseChild(child) {
            var parser = jsonparsers[child.type];
            if (!parser) return null;
            var uid;
            uid = osmEntity.id.fromOSM(child.type, child.id);

            if (options.skipSeen) {
              if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity

              _tileCache.seen[uid] = true;
            }

            return parser(child, uid);
          }
        }

        function parseUserJSON(payload, callback, options) {
          options = Object.assign({
            skipSeen: true
          }, options);

          if (!payload) {
            return callback({
              message: 'No JSON',
              status: -1
            });
          }

          var json = payload;
          if (_typeof(json) !== 'object') json = JSON.parse(payload);
          if (!json.users && !json.user) return callback({
            message: 'No JSON',
            status: -1
          });
          var objs = json.users || [json];
          var handle = window.requestIdleCallback(function () {
            _deferred["delete"](handle);

            var results = [];
            var result;

            for (var i = 0; i < objs.length; i++) {
              result = parseObj(objs[i]);
              if (result) results.push(result);
            }

            callback(null, results);
          });

          _deferred.add(handle);

          function parseObj(obj) {
            var uid = obj.user.id && obj.user.id.toString();

            if (options.skipSeen && _userCache.user[uid]) {
              delete _userCache.toLoad[uid];
              return null;
            }

            var user = jsonparsers.user(obj.user, uid);
            _userCache.user[uid] = user;
            delete _userCache.toLoad[uid];
            return user;
          }
        }

        var parsers = {
          node: function nodeData(obj, uid) {
            var attrs = obj.attributes;
            return new osmNode({
              id: uid,
              visible: getVisible(attrs),
              version: attrs.version.value,
              changeset: attrs.changeset && attrs.changeset.value,
              timestamp: attrs.timestamp && attrs.timestamp.value,
              user: attrs.user && attrs.user.value,
              uid: attrs.uid && attrs.uid.value,
              loc: getLoc(attrs),
              tags: getTags(obj)
            });
          },
          way: function wayData(obj, uid) {
            var attrs = obj.attributes;
            return new osmWay({
              id: uid,
              visible: getVisible(attrs),
              version: attrs.version.value,
              changeset: attrs.changeset && attrs.changeset.value,
              timestamp: attrs.timestamp && attrs.timestamp.value,
              user: attrs.user && attrs.user.value,
              uid: attrs.uid && attrs.uid.value,
              tags: getTags(obj),
              nodes: getNodes(obj)
            });
          },
          relation: function relationData(obj, uid) {
            var attrs = obj.attributes;
            return new osmRelation({
              id: uid,
              visible: getVisible(attrs),
              version: attrs.version.value,
              changeset: attrs.changeset && attrs.changeset.value,
              timestamp: attrs.timestamp && attrs.timestamp.value,
              user: attrs.user && attrs.user.value,
              uid: attrs.uid && attrs.uid.value,
              tags: getTags(obj),
              members: getMembers(obj)
            });
          },
          note: function parseNote(obj, uid) {
            var attrs = obj.attributes;
            var childNodes = obj.childNodes;
            var props = {};
            props.id = uid;
            props.loc = getLoc(attrs); // if notes are coincident, move them apart slightly

            var coincident = false;
            var epsilon = 0.00001;

            do {
              if (coincident) {
                props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
              }

              var bbox = geoExtent(props.loc).bbox();
              coincident = _noteCache.rtree.search(bbox).length;
            } while (coincident); // parse note contents


            for (var i = 0; i < childNodes.length; i++) {
              var node = childNodes[i];
              var nodeName = node.nodeName;
              if (nodeName === '#text') continue; // if the element is comments, parse the comments

              if (nodeName === 'comments') {
                props[nodeName] = parseComments(node.childNodes);
              } else {
                props[nodeName] = node.textContent;
              }
            }

            var note = new osmNote(props);
            var item = encodeNoteRtree(note);
            _noteCache.note[note.id] = note;

            _noteCache.rtree.insert(item);

            return note;
          },
          user: function parseUser(obj, uid) {
            var attrs = obj.attributes;
            var user = {
              id: uid,
              display_name: attrs.display_name && attrs.display_name.value,
              account_created: attrs.account_created && attrs.account_created.value,
              changesets_count: '0',
              active_blocks: '0'
            };
            var img = obj.getElementsByTagName('img');

            if (img && img[0] && img[0].getAttribute('href')) {
              user.image_url = img[0].getAttribute('href');
            }

            var changesets = obj.getElementsByTagName('changesets');

            if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
              user.changesets_count = changesets[0].getAttribute('count');
            }

            var blocks = obj.getElementsByTagName('blocks');

            if (blocks && blocks[0]) {
              var received = blocks[0].getElementsByTagName('received');

              if (received && received[0] && received[0].getAttribute('active')) {
                user.active_blocks = received[0].getAttribute('active');
              }
            }

            _userCache.user[uid] = user;
            delete _userCache.toLoad[uid];
            return user;
          }
        };

        function parseXML(xml, callback, options) {
          options = Object.assign({
            skipSeen: true
          }, options);

          if (!xml || !xml.childNodes) {
            return callback({
              message: 'No XML',
              status: -1
            });
          }

          var root = xml.childNodes[0];
          var children = root.childNodes;
          var handle = window.requestIdleCallback(function () {
            _deferred["delete"](handle);

            var results = [];
            var result;

            for (var i = 0; i < children.length; i++) {
              result = parseChild(children[i]);
              if (result) results.push(result);
            }

            callback(null, results);
          });

          _deferred.add(handle);

          function parseChild(child) {
            var parser = parsers[child.nodeName];
            if (!parser) return null;
            var uid;

            if (child.nodeName === 'user') {
              uid = child.attributes.id.value;

              if (options.skipSeen && _userCache.user[uid]) {
                delete _userCache.toLoad[uid];
                return null;
              }
            } else if (child.nodeName === 'note') {
              uid = child.getElementsByTagName('id')[0].textContent;
            } else {
              uid = osmEntity.id.fromOSM(child.nodeName, child.attributes.id.value);

              if (options.skipSeen) {
                if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity

                _tileCache.seen[uid] = true;
              }
            }

            return parser(child, uid);
          }
        } // replace or remove note from rtree


        function updateRtree(item, replace) {
          _noteCache.rtree.remove(item, function isEql(a, b) {
            return a.data.id === b.data.id;
          });

          if (replace) {
            _noteCache.rtree.insert(item);
          }
        }

        function wrapcb(thisArg, callback, cid) {
          return function (err, result) {
            if (err) {
              // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
              if (err.status === 400 || err.status === 401 || err.status === 403) {
                thisArg.logout();
              }

              return callback.call(thisArg, err);
            } else if (thisArg.getConnectionId() !== cid) {
              return callback.call(thisArg, {
                message: 'Connection Switched',
                status: -1
              });
            } else {
              return callback.call(thisArg, err, result);
            }
          };
        }

        var serviceOsm = {
          init: function init() {
            utilRebind(this, dispatch$2, 'on');
          },
          reset: function reset() {
            Array.from(_deferred).forEach(function (handle) {
              window.cancelIdleCallback(handle);

              _deferred["delete"](handle);
            });
            _connectionID++;
            _userChangesets = undefined;
            _userDetails = undefined;
            _rateLimitError = undefined;
            Object.values(_tileCache.inflight).forEach(abortRequest$2);
            Object.values(_noteCache.inflight).forEach(abortRequest$2);
            Object.values(_noteCache.inflightPost).forEach(abortRequest$2);
            if (_changeset.inflight) abortRequest$2(_changeset.inflight);
            _tileCache = {
              toLoad: {},
              loaded: {},
              inflight: {},
              seen: {},
              rtree: new RBush()
            };
            _noteCache = {
              toLoad: {},
              loaded: {},
              inflight: {},
              inflightPost: {},
              note: {},
              closed: {},
              rtree: new RBush()
            };
            _userCache = {
              toLoad: {},
              user: {}
            };
            _cachedApiStatus = undefined;
            _changeset = {};
            return this;
          },
          getConnectionId: function getConnectionId() {
            return _connectionID;
          },
          changesetURL: function changesetURL(changesetID) {
            return urlroot + '/changeset/' + changesetID;
          },
          changesetsURL: function changesetsURL(center, zoom) {
            var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
            return urlroot + '/history#map=' + Math.floor(zoom) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
          },
          entityURL: function entityURL(entity) {
            return urlroot + '/' + entity.type + '/' + entity.osmId();
          },
          historyURL: function historyURL(entity) {
            return urlroot + '/' + entity.type + '/' + entity.osmId() + '/history';
          },
          userURL: function userURL(username) {
            return urlroot + '/user/' + username;
          },
          noteURL: function noteURL(note) {
            return urlroot + '/note/' + note.id;
          },
          noteReportURL: function noteReportURL(note) {
            return urlroot + '/reports/new?reportable_type=Note&reportable_id=' + note.id;
          },
          // Generic method to load data from the OSM API
          // Can handle either auth or unauth calls.
          loadFromAPI: function loadFromAPI(path, callback, options) {
            options = Object.assign({
              skipSeen: true
            }, options);
            var that = this;
            var cid = _connectionID;

            function done(err, payload) {
              if (that.getConnectionId() !== cid) {
                if (callback) callback({
                  message: 'Connection Switched',
                  status: -1
                });
                return;
              }

              var isAuthenticated = that.authenticated(); // 400 Bad Request, 401 Unauthorized, 403 Forbidden
              // Logout and retry the request..

              if (isAuthenticated && err && err.status && (err.status === 400 || err.status === 401 || err.status === 403)) {
                that.logout();
                that.loadFromAPI(path, callback, options); // else, no retry..
              } else {
                // 509 Bandwidth Limit Exceeded, 429 Too Many Requests
                // Set the rateLimitError flag and trigger a warning..
                if (!isAuthenticated && !_rateLimitError && err && err.status && (err.status === 509 || err.status === 429)) {
                  _rateLimitError = err;
                  dispatch$2.call('change');
                  that.reloadApiStatus();
                } else if (err && _cachedApiStatus === 'online' || !err && _cachedApiStatus !== 'online') {
                  // If the response's error state doesn't match the status,
                  // it's likely we lost or gained the connection so reload the status
                  that.reloadApiStatus();
                }

                if (callback) {
                  if (err) {
                    return callback(err);
                  } else {
                    if (path.indexOf('.json') !== -1) {
                      return parseJSON(payload, callback, options);
                    } else {
                      return parseXML(payload, callback, options);
                    }
                  }
                }
              }
            }

            if (this.authenticated()) {
              return oauth.xhr({
                method: 'GET',
                path: path
              }, done);
            } else {
              var url = urlroot + path;
              var controller = new AbortController();
              var fn;

              if (path.indexOf('.json') !== -1) {
                fn = d3_json;
              } else {
                fn = d3_xml;
              }

              fn(url, {
                signal: controller.signal
              }).then(function (data) {
                done(null, data);
              })["catch"](function (err) {
                if (err.name === 'AbortError') return; // d3-fetch includes status in the error message,
                // but we can't access the response itself
                // https://github.com/d3/d3-fetch/issues/27

                var match = err.message.match(/^\d{3}/);

                if (match) {
                  done({
                    status: +match[0],
                    statusText: err.message
                  });
                } else {
                  done(err.message);
                }
              });
              return controller;
            }
          },
          // Load a single entity by id (ways and relations use the `/full` call to include
          // nodes and members). Parent relations are not included, see `loadEntityRelations`.
          // GET /api/0.6/node/#id
          // GET /api/0.6/[way|relation]/#id/full
          loadEntity: function loadEntity(id, callback) {
            var type = osmEntity.id.type(id);
            var osmID = osmEntity.id.toOSM(id);
            var options = {
              skipSeen: false
            };
            this.loadFromAPI('/api/0.6/' + type + '/' + osmID + (type !== 'node' ? '/full' : '') + '.json', function (err, entities) {
              if (callback) callback(err, {
                data: entities
              });
            }, options);
          },
          // Load a single entity with a specific version
          // GET /api/0.6/[node|way|relation]/#id/#version
          loadEntityVersion: function loadEntityVersion(id, version, callback) {
            var type = osmEntity.id.type(id);
            var osmID = osmEntity.id.toOSM(id);
            var options = {
              skipSeen: false
            };
            this.loadFromAPI('/api/0.6/' + type + '/' + osmID + '/' + version + '.json', function (err, entities) {
              if (callback) callback(err, {
                data: entities
              });
            }, options);
          },
          // Load the relations of a single entity with the given.
          // GET /api/0.6/[node|way|relation]/#id/relations
          loadEntityRelations: function loadEntityRelations(id, callback) {
            var type = osmEntity.id.type(id);
            var osmID = osmEntity.id.toOSM(id);
            var options = {
              skipSeen: false
            };
            this.loadFromAPI('/api/0.6/' + type + '/' + osmID + '/relations.json', function (err, entities) {
              if (callback) callback(err, {
                data: entities
              });
            }, options);
          },
          // Load multiple entities in chunks
          // (note: callback may be called multiple times)
          // Unlike `loadEntity`, child nodes and members are not fetched
          // GET /api/0.6/[nodes|ways|relations]?#parameters
          loadMultiple: function loadMultiple(ids, callback) {
            var that = this;
            var groups = utilArrayGroupBy(utilArrayUniq(ids), osmEntity.id.type);
            Object.keys(groups).forEach(function (k) {
              var type = k + 's'; // nodes, ways, relations

              var osmIDs = groups[k].map(function (id) {
                return osmEntity.id.toOSM(id);
              });
              var options = {
                skipSeen: false
              };
              utilArrayChunk(osmIDs, 150).forEach(function (arr) {
                that.loadFromAPI('/api/0.6/' + type + '.json?' + type + '=' + arr.join(), function (err, entities) {
                  if (callback) callback(err, {
                    data: entities
                  });
                }, options);
              });
            });
          },
          // Create, upload, and close a changeset
          // PUT /api/0.6/changeset/create
          // POST /api/0.6/changeset/#id/upload
          // PUT /api/0.6/changeset/#id/close
          putChangeset: function putChangeset(changeset, changes, callback) {
            var cid = _connectionID;

            if (_changeset.inflight) {
              return callback({
                message: 'Changeset already inflight',
                status: -2
              }, changeset);
            } else if (_changeset.open) {
              // reuse existing open changeset..
              return createdChangeset.call(this, null, _changeset.open);
            } else {
              // Open a new changeset..
              var options = {
                method: 'PUT',
                path: '/api/0.6/changeset/create',
                options: {
                  header: {
                    'Content-Type': 'text/xml'
                  }
                },
                content: JXON.stringify(changeset.asJXON())
              };
              _changeset.inflight = oauth.xhr(options, wrapcb(this, createdChangeset, cid));
            }

            function createdChangeset(err, changesetID) {
              _changeset.inflight = null;

              if (err) {
                return callback(err, changeset);
              }

              _changeset.open = changesetID;
              changeset = changeset.update({
                id: changesetID
              }); // Upload the changeset..

              var options = {
                method: 'POST',
                path: '/api/0.6/changeset/' + changesetID + '/upload',
                options: {
                  header: {
                    'Content-Type': 'text/xml'
                  }
                },
                content: JXON.stringify(changeset.osmChangeJXON(changes))
              };
              _changeset.inflight = oauth.xhr(options, wrapcb(this, uploadedChangeset, cid));
            }

            function uploadedChangeset(err) {
              _changeset.inflight = null;
              if (err) return callback(err, changeset); // Upload was successful, safe to call the callback.
              // Add delay to allow for postgres replication #1646 #2678

              window.setTimeout(function () {
                callback(null, changeset);
              }, 2500);
              _changeset.open = null; // At this point, we don't really care if the connection was switched..
              // Only try to close the changeset if we're still talking to the same server.

              if (this.getConnectionId() === cid) {
                // Still attempt to close changeset, but ignore response because #2667
                oauth.xhr({
                  method: 'PUT',
                  path: '/api/0.6/changeset/' + changeset.id + '/close',
                  options: {
                    header: {
                      'Content-Type': 'text/xml'
                    }
                  }
                }, function () {
                  return true;
                });
              }
            }
          },
          // Load multiple users in chunks
          // (note: callback may be called multiple times)
          // GET /api/0.6/users?users=#id1,#id2,...,#idn
          loadUsers: function loadUsers(uids, callback) {
            var toLoad = [];
            var cached = [];
            utilArrayUniq(uids).forEach(function (uid) {
              if (_userCache.user[uid]) {
                delete _userCache.toLoad[uid];
                cached.push(_userCache.user[uid]);
              } else {
                toLoad.push(uid);
              }
            });

            if (cached.length || !this.authenticated()) {
              callback(undefined, cached);
              if (!this.authenticated()) return; // require auth
            }

            utilArrayChunk(toLoad, 150).forEach(function (arr) {
              oauth.xhr({
                method: 'GET',
                path: '/api/0.6/users.json?users=' + arr.join()
              }, wrapcb(this, done, _connectionID));
            }.bind(this));

            function done(err, payload) {
              if (err) return callback(err);
              var options = {
                skipSeen: true
              };
              return parseUserJSON(payload, function (err, results) {
                if (err) return callback(err);
                return callback(undefined, results);
              }, options);
            }
          },
          // Load a given user by id
          // GET /api/0.6/user/#id
          loadUser: function loadUser(uid, callback) {
            if (_userCache.user[uid] || !this.authenticated()) {
              // require auth
              delete _userCache.toLoad[uid];
              return callback(undefined, _userCache.user[uid]);
            }

            oauth.xhr({
              method: 'GET',
              path: '/api/0.6/user/' + uid + '.json'
            }, wrapcb(this, done, _connectionID));

            function done(err, payload) {
              if (err) return callback(err);
              var options = {
                skipSeen: true
              };
              return parseUserJSON(payload, function (err, results) {
                if (err) return callback(err);
                return callback(undefined, results[0]);
              }, options);
            }
          },
          // Load the details of the logged-in user
          // GET /api/0.6/user/details
          userDetails: function userDetails(callback) {
            if (_userDetails) {
              // retrieve cached
              return callback(undefined, _userDetails);
            }

            oauth.xhr({
              method: 'GET',
              path: '/api/0.6/user/details.json'
            }, wrapcb(this, done, _connectionID));

            function done(err, payload) {
              if (err) return callback(err);
              var options = {
                skipSeen: false
              };
              return parseUserJSON(payload, function (err, results) {
                if (err) return callback(err);
                _userDetails = results[0];
                return callback(undefined, _userDetails);
              }, options);
            }
          },
          // Load previous changesets for the logged in user
          // GET /api/0.6/changesets?user=#id
          userChangesets: function userChangesets(callback) {
            if (_userChangesets) {
              // retrieve cached
              return callback(undefined, _userChangesets);
            }

            this.userDetails(wrapcb(this, gotDetails, _connectionID));

            function gotDetails(err, user) {
              if (err) {
                return callback(err);
              }

              oauth.xhr({
                method: 'GET',
                path: '/api/0.6/changesets?user=' + user.id
              }, wrapcb(this, done, _connectionID));
            }

            function done(err, xml) {
              if (err) {
                return callback(err);
              }

              _userChangesets = Array.prototype.map.call(xml.getElementsByTagName('changeset'), function (changeset) {
                return {
                  tags: getTags(changeset)
                };
              }).filter(function (changeset) {
                var comment = changeset.tags.comment;
                return comment && comment !== '';
              });
              return callback(undefined, _userChangesets);
            }
          },
          // Fetch the status of the OSM API
          // GET /api/capabilities
          status: function status(callback) {
            var url = urlroot + '/api/capabilities';
            var errback = wrapcb(this, done, _connectionID);
            d3_xml(url).then(function (data) {
              errback(null, data);
            })["catch"](function (err) {
              errback(err.message);
            });

            function done(err, xml) {
              if (err) {
                // the status is null if no response could be retrieved
                return callback(err, null);
              } // update blocklists


              var elements = xml.getElementsByTagName('blacklist');
              var regexes = [];

              for (var i = 0; i < elements.length; i++) {
                var regexString = elements[i].getAttribute('regex'); // needs unencode?

                if (regexString) {
                  try {
                    var regex = new RegExp(regexString);
                    regexes.push(regex);
                  } catch (e) {
                    /* noop */
                  }
                }
              }

              if (regexes.length) {
                _imageryBlocklists = regexes;
              }

              if (_rateLimitError) {
                return callback(_rateLimitError, 'rateLimited');
              } else {
                var waynodes = xml.getElementsByTagName('waynodes');
                var maxWayNodes = waynodes.length && parseInt(waynodes[0].getAttribute('maximum'), 10);
                if (maxWayNodes && isFinite(maxWayNodes)) _maxWayNodes = maxWayNodes;
                var apiStatus = xml.getElementsByTagName('status');
                var val = apiStatus[0].getAttribute('api');
                return callback(undefined, val);
              }
            }
          },
          // Calls `status` and dispatches an `apiStatusChange` event if the returned
          // status differs from the cached status.
          reloadApiStatus: function reloadApiStatus() {
            // throttle to avoid unnecessary API calls
            if (!this.throttledReloadApiStatus) {
              var that = this;
              this.throttledReloadApiStatus = throttle(function () {
                that.status(function (err, status) {
                  if (status !== _cachedApiStatus) {
                    _cachedApiStatus = status;
                    dispatch$2.call('apiStatusChange', that, err, status);
                  }
                });
              }, 500);
            }

            this.throttledReloadApiStatus();
          },
          // Returns the maximum number of nodes a single way can have
          maxWayNodes: function maxWayNodes() {
            return _maxWayNodes;
          },
          // Load data (entities) from the API in tiles
          // GET /api/0.6/map?bbox=
          loadTiles: function loadTiles(projection, callback) {
            if (_off) return; // determine the needed tiles to cover the view

            var tiles = tiler$2.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection); // abort inflight requests that are no longer needed

            var hadRequests = hasInflightRequests(_tileCache);
            abortUnwantedRequests(_tileCache, tiles);

            if (hadRequests && !hasInflightRequests(_tileCache)) {
              dispatch$2.call('loaded'); // stop the spinner
            } // issue new requests..


            tiles.forEach(function (tile) {
              this.loadTile(tile, callback);
            }, this);
          },
          // Load a single data tile
          // GET /api/0.6/map?bbox=
          loadTile: function loadTile(tile, callback) {
            if (_off) return;
            if (_tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;

            if (!hasInflightRequests(_tileCache)) {
              dispatch$2.call('loading'); // start the spinner
            }

            var path = '/api/0.6/map.json?bbox=';
            var options = {
              skipSeen: true
            };
            _tileCache.inflight[tile.id] = this.loadFromAPI(path + tile.extent.toParam(), tileCallback, options);

            function tileCallback(err, parsed) {
              delete _tileCache.inflight[tile.id];

              if (!err) {
                delete _tileCache.toLoad[tile.id];
                _tileCache.loaded[tile.id] = true;
                var bbox = tile.extent.bbox();
                bbox.id = tile.id;

                _tileCache.rtree.insert(bbox);
              }

              if (callback) {
                callback(err, Object.assign({
                  data: parsed
                }, tile));
              }

              if (!hasInflightRequests(_tileCache)) {
                dispatch$2.call('loaded'); // stop the spinner
              }
            }
          },
          isDataLoaded: function isDataLoaded(loc) {
            var bbox = {
              minX: loc[0],
              minY: loc[1],
              maxX: loc[0],
              maxY: loc[1]
            };
            return _tileCache.rtree.collides(bbox);
          },
          // load the tile that covers the given `loc`
          loadTileAtLoc: function loadTileAtLoc(loc, callback) {
            // Back off if the toLoad queue is filling up.. re #6417
            // (Currently `loadTileAtLoc` requests are considered low priority - used by operations to
            // let users safely edit geometries which extend to unloaded tiles.  We can drop some.)
            if (Object.keys(_tileCache.toLoad).length > 50) return;
            var k = geoZoomToScale(_tileZoom + 1);
            var offset = geoRawMercator().scale(k)(loc);
            var projection = geoRawMercator().transform({
              k: k,
              x: -offset[0],
              y: -offset[1]
            });
            var tiles = tiler$2.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection);
            tiles.forEach(function (tile) {
              if (_tileCache.toLoad[tile.id] || _tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;
              _tileCache.toLoad[tile.id] = true;
              this.loadTile(tile, callback);
            }, this);
          },
          // Load notes from the API in tiles
          // GET /api/0.6/notes?bbox=
          loadNotes: function loadNotes(projection, noteOptions) {
            noteOptions = Object.assign({
              limit: 10000,
              closed: 7
            }, noteOptions);
            if (_off) return;
            var that = this;
            var path = '/api/0.6/notes?limit=' + noteOptions.limit + '&closed=' + noteOptions.closed + '&bbox=';

            var throttleLoadUsers = throttle(function () {
              var uids = Object.keys(_userCache.toLoad);
              if (!uids.length) return;
              that.loadUsers(uids, function () {}); // eagerly load user details
            }, 750); // determine the needed tiles to cover the view


            var tiles = tiler$2.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection); // abort inflight requests that are no longer needed

            abortUnwantedRequests(_noteCache, tiles); // issue new requests..

            tiles.forEach(function (tile) {
              if (_noteCache.loaded[tile.id] || _noteCache.inflight[tile.id]) return;
              var options = {
                skipSeen: false
              };
              _noteCache.inflight[tile.id] = that.loadFromAPI(path + tile.extent.toParam(), function (err) {
                delete _noteCache.inflight[tile.id];

                if (!err) {
                  _noteCache.loaded[tile.id] = true;
                }

                throttleLoadUsers();
                dispatch$2.call('loadedNotes');
              }, options);
            });
          },
          // Create a note
          // POST /api/0.6/notes?params
          postNoteCreate: function postNoteCreate(note, callback) {
            if (!this.authenticated()) {
              return callback({
                message: 'Not Authenticated',
                status: -3
              }, note);
            }

            if (_noteCache.inflightPost[note.id]) {
              return callback({
                message: 'Note update already inflight',
                status: -2
              }, note);
            }

            if (!note.loc[0] || !note.loc[1] || !note.newComment) return; // location & description required

            var comment = note.newComment;

            if (note.newCategory && note.newCategory !== 'None') {
              comment += ' #' + note.newCategory;
            }

            var path = '/api/0.6/notes?' + utilQsString({
              lon: note.loc[0],
              lat: note.loc[1],
              text: comment
            });
            _noteCache.inflightPost[note.id] = oauth.xhr({
              method: 'POST',
              path: path
            }, wrapcb(this, done, _connectionID));

            function done(err, xml) {
              delete _noteCache.inflightPost[note.id];

              if (err) {
                return callback(err);
              } // we get the updated note back, remove from caches and reparse..


              this.removeNote(note);
              var options = {
                skipSeen: false
              };
              return parseXML(xml, function (err, results) {
                if (err) {
                  return callback(err);
                } else {
                  return callback(undefined, results[0]);
                }
              }, options);
            }
          },
          // Update a note
          // POST /api/0.6/notes/#id/comment?text=comment
          // POST /api/0.6/notes/#id/close?text=comment
          // POST /api/0.6/notes/#id/reopen?text=comment
          postNoteUpdate: function postNoteUpdate(note, newStatus, callback) {
            if (!this.authenticated()) {
              return callback({
                message: 'Not Authenticated',
                status: -3
              }, note);
            }

            if (_noteCache.inflightPost[note.id]) {
              return callback({
                message: 'Note update already inflight',
                status: -2
              }, note);
            }

            var action;

            if (note.status !== 'closed' && newStatus === 'closed') {
              action = 'close';
            } else if (note.status !== 'open' && newStatus === 'open') {
              action = 'reopen';
            } else {
              action = 'comment';
              if (!note.newComment) return; // when commenting, comment required
            }

            var path = '/api/0.6/notes/' + note.id + '/' + action;

            if (note.newComment) {
              path += '?' + utilQsString({
                text: note.newComment
              });
            }

            _noteCache.inflightPost[note.id] = oauth.xhr({
              method: 'POST',
              path: path
            }, wrapcb(this, done, _connectionID));

            function done(err, xml) {
              delete _noteCache.inflightPost[note.id];

              if (err) {
                return callback(err);
              } // we get the updated note back, remove from caches and reparse..


              this.removeNote(note); // update closed note cache - used to populate `closed:note` changeset tag

              if (action === 'close') {
                _noteCache.closed[note.id] = true;
              } else if (action === 'reopen') {
                delete _noteCache.closed[note.id];
              }

              var options = {
                skipSeen: false
              };
              return parseXML(xml, function (err, results) {
                if (err) {
                  return callback(err);
                } else {
                  return callback(undefined, results[0]);
                }
              }, options);
            }
          },
          "switch": function _switch(options) {
            urlroot = options.urlroot;
            oauth.options(Object.assign({
              url: urlroot,
              loading: authLoading,
              done: authDone
            }, options));
            this.reset();
            this.userChangesets(function () {}); // eagerly load user details/changesets

            dispatch$2.call('change');
            return this;
          },
          toggle: function toggle(val) {
            _off = !val;
            return this;
          },
          isChangesetInflight: function isChangesetInflight() {
            return !!_changeset.inflight;
          },
          // get/set cached data
          // This is used to save/restore the state when entering/exiting the walkthrough
          // Also used for testing purposes.
          caches: function caches(obj) {
            function cloneCache(source) {
              var target = {};
              Object.keys(source).forEach(function (k) {
                if (k === 'rtree') {
                  target.rtree = new RBush().fromJSON(source.rtree.toJSON()); // clone rbush
                } else if (k === 'note') {
                  target.note = {};
                  Object.keys(source.note).forEach(function (id) {
                    target.note[id] = osmNote(source.note[id]); // copy notes
                  });
                } else {
                  target[k] = JSON.parse(JSON.stringify(source[k])); // clone deep
                }
              });
              return target;
            }

            if (!arguments.length) {
              return {
                tile: cloneCache(_tileCache),
                note: cloneCache(_noteCache),
                user: cloneCache(_userCache)
              };
            } // access caches directly for testing (e.g., loading notes rtree)


            if (obj === 'get') {
              return {
                tile: _tileCache,
                note: _noteCache,
                user: _userCache
              };
            }

            if (obj.tile) {
              _tileCache = obj.tile;
              _tileCache.inflight = {};
            }

            if (obj.note) {
              _noteCache = obj.note;
              _noteCache.inflight = {};
              _noteCache.inflightPost = {};
            }

            if (obj.user) {
              _userCache = obj.user;
            }

            return this;
          },
          logout: function logout() {
            _userChangesets = undefined;
            _userDetails = undefined;
            oauth.logout();
            dispatch$2.call('change');
            return this;
          },
          authenticated: function authenticated() {
            return oauth.authenticated();
          },
          authenticate: function authenticate(callback) {
            var that = this;
            var cid = _connectionID;
            _userChangesets = undefined;
            _userDetails = undefined;

            function done(err, res) {
              if (err) {
                if (callback) callback(err);
                return;
              }

              if (that.getConnectionId() !== cid) {
                if (callback) callback({
                  message: 'Connection Switched',
                  status: -1
                });
                return;
              }

              _rateLimitError = undefined;
              dispatch$2.call('change');
              if (callback) callback(err, res);
              that.userChangesets(function () {}); // eagerly load user details/changesets
            }

            return oauth.authenticate(done);
          },
          imageryBlocklists: function imageryBlocklists() {
            return _imageryBlocklists;
          },
          tileZoom: function tileZoom(val) {
            if (!arguments.length) return _tileZoom;
            _tileZoom = val;
            return this;
          },
          // get all cached notes covering the viewport
          notes: function notes(projection) {
            var viewport = projection.clipExtent();
            var min = [viewport[0][0], viewport[1][1]];
            var max = [viewport[1][0], viewport[0][1]];
            var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
            return _noteCache.rtree.search(bbox).map(function (d) {
              return d.data;
            });
          },
          // get a single note from the cache
          getNote: function getNote(id) {
            return _noteCache.note[id];
          },
          // remove a single note from the cache
          removeNote: function removeNote(note) {
            if (!(note instanceof osmNote) || !note.id) return;
            delete _noteCache.note[note.id];
            updateRtree(encodeNoteRtree(note), false); // false = remove
          },
          // replace a single note in the cache
          replaceNote: function replaceNote(note) {
            if (!(note instanceof osmNote) || !note.id) return;
            _noteCache.note[note.id] = note;
            updateRtree(encodeNoteRtree(note), true); // true = replace

            return note;
          },
          // Get an array of note IDs closed during this session.
          // Used to populate `closed:note` changeset tag
          getClosedIDs: function getClosedIDs() {
            return Object.keys(_noteCache.closed).sort();
          }
        };

        var _apibase$1 = 'https://wiki.openstreetmap.org/w/api.php';
        var _inflight$1 = {};
        var _wikibaseCache = {};
        var _localeIDs = {
          en: false
        };

        var debouncedRequest$1 = debounce(request$1, 500, {
          leading: false
        });

        function request$1(url, callback) {
          if (_inflight$1[url]) return;
          var controller = new AbortController();
          _inflight$1[url] = controller;
          d3_json(url, {
            signal: controller.signal
          }).then(function (result) {
            delete _inflight$1[url];
            if (callback) callback(null, result);
          })["catch"](function (err) {
            delete _inflight$1[url];
            if (err.name === 'AbortError') return;
            if (callback) callback(err.message);
          });
        }

        var serviceOsmWikibase = {
          init: function init() {
            _inflight$1 = {};
            _wikibaseCache = {};
            _localeIDs = {};
          },
          reset: function reset() {
            Object.values(_inflight$1).forEach(function (controller) {
              controller.abort();
            });
            _inflight$1 = {};
          },

          /**
           * Get the best value for the property, or undefined if not found
           * @param entity object from wikibase
           * @param property string e.g. 'P4' for image
           * @param langCode string e.g. 'fr' for French
           */
          claimToValue: function claimToValue(entity, property, langCode) {
            if (!entity.claims[property]) return undefined;
            var locale = _localeIDs[langCode];
            var preferredPick, localePick;
            entity.claims[property].forEach(function (stmt) {
              // If exists, use value limited to the needed language (has a qualifier P26 = locale)
              // Or if not found, use the first value with the "preferred" rank
              if (!preferredPick && stmt.rank === 'preferred') {
                preferredPick = stmt;
              }

              if (locale && stmt.qualifiers && stmt.qualifiers.P26 && stmt.qualifiers.P26[0].datavalue.value.id === locale) {
                localePick = stmt;
              }
            });
            var result = localePick || preferredPick;

            if (result) {
              var datavalue = result.mainsnak.datavalue;
              return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
            } else {
              return undefined;
            }
          },

          /**
           * Convert monolingual property into a key-value object (language -> value)
           * @param entity object from wikibase
           * @param property string e.g. 'P31' for monolingual wiki page title
           */
          monolingualClaimToValueObj: function monolingualClaimToValueObj(entity, property) {
            if (!entity || !entity.claims[property]) return undefined;
            return entity.claims[property].reduce(function (acc, obj) {
              var value = obj.mainsnak.datavalue.value;
              acc[value.language] = value.text;
              return acc;
            }, {});
          },
          toSitelink: function toSitelink(key, value) {
            var result = value ? 'Tag:' + key + '=' + value : 'Key:' + key;
            return result.replace(/_/g, ' ').trim();
          },
          //
          // Pass params object of the form:
          // {
          //   key: 'string',
          //   value: 'string',
          //   langCode: 'string'
          // }
          //
          getEntity: function getEntity(params, callback) {
            var doRequest = params.debounce ? debouncedRequest$1 : request$1;
            var that = this;
            var titles = [];
            var result = {};
            var rtypeSitelink = params.key === 'type' && params.value ? ('Relation:' + params.value).replace(/_/g, ' ').trim() : false;
            var keySitelink = params.key ? this.toSitelink(params.key) : false;
            var tagSitelink = params.key && params.value ? this.toSitelink(params.key, params.value) : false;
            var localeSitelink;

            if (params.langCodes) {
              params.langCodes.forEach(function (langCode) {
                if (_localeIDs[langCode] === undefined) {
                  // If this is the first time we are asking about this locale,
                  // fetch corresponding entity (if it exists), and cache it.
                  // If there is no such entry, cache `false` value to avoid re-requesting it.
                  localeSitelink = ('Locale:' + langCode).replace(/_/g, ' ').trim();
                  titles.push(localeSitelink);
                }
              });
            }

            if (rtypeSitelink) {
              if (_wikibaseCache[rtypeSitelink]) {
                result.rtype = _wikibaseCache[rtypeSitelink];
              } else {
                titles.push(rtypeSitelink);
              }
            }

            if (keySitelink) {
              if (_wikibaseCache[keySitelink]) {
                result.key = _wikibaseCache[keySitelink];
              } else {
                titles.push(keySitelink);
              }
            }

            if (tagSitelink) {
              if (_wikibaseCache[tagSitelink]) {
                result.tag = _wikibaseCache[tagSitelink];
              } else {
                titles.push(tagSitelink);
              }
            }

            if (!titles.length) {
              // Nothing to do, we already had everything in the cache
              return callback(null, result);
            } // Requesting just the user language code
            // If backend recognizes the code, it will perform proper fallbacks,
            // and the result will contain the requested code. If not, all values are returned:
            // {"zh-tw":{"value":"...","language":"zh-tw","source-language":"zh-hant"}
            // {"pt-br":{"value":"...","language":"pt","for-language":"pt-br"}}


            var obj = {
              action: 'wbgetentities',
              sites: 'wiki',
              titles: titles.join('|'),
              languages: params.langCodes.join('|'),
              languagefallback: 1,
              origin: '*',
              format: 'json' // There is an MW Wikibase API bug https://phabricator.wikimedia.org/T212069
              // We shouldn't use v1 until it gets fixed, but should switch to it afterwards
              // formatversion: 2,

            };
            var url = _apibase$1 + '?' + utilQsString(obj);
            doRequest(url, function (err, d) {
              if (err) {
                callback(err);
              } else if (!d.success || d.error) {
                callback(d.error.messages.map(function (v) {
                  return v.html['*'];
                }).join('<br>'));
              } else {
                var localeID = false;
                Object.values(d.entities).forEach(function (res) {
                  if (res.missing !== '') {
                    var title = res.sitelinks.wiki.title;

                    if (title === rtypeSitelink) {
                      _wikibaseCache[rtypeSitelink] = res;
                      result.rtype = res;
                    } else if (title === keySitelink) {
                      _wikibaseCache[keySitelink] = res;
                      result.key = res;
                    } else if (title === tagSitelink) {
                      _wikibaseCache[tagSitelink] = res;
                      result.tag = res;
                    } else if (title === localeSitelink) {
                      localeID = res.id;
                    } else {
                      console.log('Unexpected title ' + title); // eslint-disable-line no-console
                    }
                  }
                });

                if (localeSitelink) {
                  // If locale ID is not found, store false to prevent repeated queries
                  that.addLocale(params.langCodes[0], localeID);
                }

                callback(null, result);
              }
            });
          },
          //
          // Pass params object of the form:
          // {
          //   key: 'string',     // required
          //   value: 'string'    // optional
          // }
          //
          // Get an result object used to display tag documentation
          // {
          //   title:        'string',
          //   description:  'string',
          //   editURL:      'string',
          //   imageURL:     'string',
          //   wiki:         { title: 'string', text: 'string', url: 'string' }
          // }
          //
          getDocs: function getDocs(params, callback) {
            var that = this;
            var langCodes = _mainLocalizer.localeCodes().map(function (code) {
              return code.toLowerCase();
            });
            params.langCodes = langCodes;
            this.getEntity(params, function (err, data) {
              if (err) {
                callback(err);
                return;
              }

              var entity = data.rtype || data.tag || data.key;

              if (!entity) {
                callback('No entity');
                return;
              }

              var i;
              var description;

              for (i in langCodes) {
                var _code = langCodes[i];

                if (entity.descriptions[_code] && entity.descriptions[_code].language === _code) {
                  description = entity.descriptions[_code];
                  break;
                }
              }

              if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result

              var result = {
                title: entity.title,
                description: description ? description.value : '',
                descriptionLocaleCode: description ? description.language : '',
                editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
              }; // add image

              if (entity.claims) {
                var imageroot;
                var image = that.claimToValue(entity, 'P4', langCodes[0]);

                if (image) {
                  imageroot = 'https://commons.wikimedia.org/w/index.php';
                } else {
                  image = that.claimToValue(entity, 'P28', langCodes[0]);

                  if (image) {
                    imageroot = 'https://wiki.openstreetmap.org/w/index.php';
                  }
                }

                if (imageroot && image) {
                  result.imageURL = imageroot + '?' + utilQsString({
                    title: 'Special:Redirect/file/' + image,
                    width: 400
                  });
                }
              } // Try to get a wiki page from tag data item first, followed by the corresponding key data item.
              // If neither tag nor key data item contain a wiki page in the needed language nor English,
              // get the first found wiki page from either the tag or the key item.


              var rtypeWiki = that.monolingualClaimToValueObj(data.rtype, 'P31');
              var tagWiki = that.monolingualClaimToValueObj(data.tag, 'P31');
              var keyWiki = that.monolingualClaimToValueObj(data.key, 'P31');
              var wikis = [rtypeWiki, tagWiki, keyWiki];

              for (i in wikis) {
                var wiki = wikis[i];

                for (var j in langCodes) {
                  var code = langCodes[j];
                  var referenceId = langCodes[0].split('-')[0] !== 'en' && code.split('-')[0] === 'en' ? 'inspector.wiki_en_reference' : 'inspector.wiki_reference';
                  var info = getWikiInfo(wiki, code, referenceId);

                  if (info) {
                    result.wiki = info;
                    break;
                  }
                }

                if (result.wiki) break;
              }

              callback(null, result); // Helper method to get wiki info if a given language exists

              function getWikiInfo(wiki, langCode, tKey) {
                if (wiki && wiki[langCode]) {
                  return {
                    title: wiki[langCode],
                    text: tKey,
                    url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
                  };
                }
              }
            });
          },
          addLocale: function addLocale(langCode, qid) {
            // Makes it easier to unit test
            _localeIDs[langCode] = qid;
          },
          apibase: function apibase(val) {
            if (!arguments.length) return _apibase$1;
            _apibase$1 = val;
            return this;
          }
        };

        var jsonpCache = {};
        window.jsonpCache = jsonpCache;
        function jsonpRequest(url, callback) {
          var request = {
            abort: function abort() {}
          };

          if (window.JSONP_FIX) {
            if (window.JSONP_DELAY === 0) {
              callback(window.JSONP_FIX);
            } else {
              var t = window.setTimeout(function () {
                callback(window.JSONP_FIX);
              }, window.JSONP_DELAY || 0);

              request.abort = function () {
                window.clearTimeout(t);
              };
            }

            return request;
          }

          function rand() {
            var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
            var c = '';
            var i = -1;

            while (++i < 15) {
              c += chars.charAt(Math.floor(Math.random() * 52));
            }

            return c;
          }

          function create(url) {
            var e = url.match(/callback=(\w+)/);
            var c = e ? e[1] : rand();

            jsonpCache[c] = function (data) {
              if (jsonpCache[c]) {
                callback(data);
              }

              finalize();
            };

            function finalize() {
              delete jsonpCache[c];
              script.remove();
            }

            request.abort = finalize;
            return 'jsonpCache.' + c;
          }

          var cb = create(url);
          var script = select('head').append('script').attr('type', 'text/javascript').attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
          return request;
        }

        var bubbleApi = 'https://dev.virtualearth.net/mapcontrol/HumanScaleServices/GetBubbles.ashx?';
        var streetsideImagesApi = 'https://t.ssl.ak.tiles.virtualearth.net/tiles/';
        var bubbleAppKey = 'AuftgJsO0Xs8Ts4M1xZUQJQXJNsvmh3IV8DkNieCiy3tCwCUMq76-WpkrBtNAuEm';
        var pannellumViewerCSS = 'pannellum-streetside/pannellum.css';
        var pannellumViewerJS = 'pannellum-streetside/pannellum.js';
        var maxResults = 2000;
        var tileZoom = 16.5;
        var tiler$1 = utilTiler().zoomExtent([tileZoom, tileZoom]).skipNullIsland(true);
        var dispatch$1 = dispatch$8('loadedImages', 'viewerChanged');
        var minHfov = 10; // zoom in degrees:  20, 10, 5

        var maxHfov = 90; // zoom out degrees

        var defaultHfov = 45;
        var _hires = false;
        var _resolution = 512; // higher numbers are slower - 512, 1024, 2048, 4096

        var _currScene = 0;

        var _ssCache;

        var _pannellumViewer;

        var _sceneOptions = {
          showFullscreenCtrl: false,
          autoLoad: true,
          compass: true,
          yaw: 0,
          minHfov: minHfov,
          maxHfov: maxHfov,
          hfov: defaultHfov,
          type: 'cubemap',
          cubeMap: []
        };

        var _loadViewerPromise;
        /**
         * abortRequest().
         */


        function abortRequest$1(i) {
          i.abort();
        }
        /**
         * localeTimeStamp().
         */


        function localeTimestamp(s) {
          if (!s) return null;
          var options = {
            day: 'numeric',
            month: 'short',
            year: 'numeric'
          };
          var d = new Date(s);
          if (isNaN(d.getTime())) return null;
          return d.toLocaleString(_mainLocalizer.localeCode(), options);
        }
        /**
         * loadTiles() wraps the process of generating tiles and then fetching image points for each tile.
         */


        function loadTiles(which, url, projection, margin) {
          var tiles = tiler$1.margin(margin).getTiles(projection); // abort inflight requests that are no longer needed

          var cache = _ssCache[which];
          Object.keys(cache.inflight).forEach(function (k) {
            var wanted = tiles.find(function (tile) {
              return k.indexOf(tile.id + ',') === 0;
            });

            if (!wanted) {
              abortRequest$1(cache.inflight[k]);
              delete cache.inflight[k];
            }
          });
          tiles.forEach(function (tile) {
            return loadNextTilePage(which, url, tile);
          });
        }
        /**
         * loadNextTilePage() load data for the next tile page in line.
         */


        function loadNextTilePage(which, url, tile) {
          var cache = _ssCache[which];
          var nextPage = cache.nextPage[tile.id] || 0;
          var id = tile.id + ',' + String(nextPage);
          if (cache.loaded[id] || cache.inflight[id]) return;
          cache.inflight[id] = getBubbles(url, tile, function (bubbles) {
            cache.loaded[id] = true;
            delete cache.inflight[id];
            if (!bubbles) return; // [].shift() removes the first element, some statistics info, not a bubble point

            bubbles.shift();
            var features = bubbles.map(function (bubble) {
              if (cache.points[bubble.id]) return null; // skip duplicates

              var loc = [bubble.lo, bubble.la];
              var d = {
                loc: loc,
                key: bubble.id,
                ca: bubble.he,
                captured_at: bubble.cd,
                captured_by: 'microsoft',
                // nbn: bubble.nbn,
                // pbn: bubble.pbn,
                // ad: bubble.ad,
                // rn: bubble.rn,
                pr: bubble.pr,
                // previous
                ne: bubble.ne,
                // next
                pano: true,
                sequenceKey: null
              };
              cache.points[bubble.id] = d; // a sequence starts here

              if (bubble.pr === undefined) {
                cache.leaders.push(bubble.id);
              }

              return {
                minX: loc[0],
                minY: loc[1],
                maxX: loc[0],
                maxY: loc[1],
                data: d
              };
            }).filter(Boolean);
            cache.rtree.load(features);
            connectSequences();

            if (which === 'bubbles') {
              dispatch$1.call('loadedImages');
            }
          });
        } // call this sometimes to connect the bubbles into sequences


        function connectSequences() {
          var cache = _ssCache.bubbles;
          var keepLeaders = [];

          for (var i = 0; i < cache.leaders.length; i++) {
            var bubble = cache.points[cache.leaders[i]];
            var seen = {}; // try to make a sequence.. use the key of the leader bubble.

            var sequence = {
              key: bubble.key,
              bubbles: []
            };
            var complete = false;

            do {
              sequence.bubbles.push(bubble);
              seen[bubble.key] = true;

              if (bubble.ne === undefined) {
                complete = true;
              } else {
                bubble = cache.points[bubble.ne]; // advance to next
              }
            } while (bubble && !seen[bubble.key] && !complete);

            if (complete) {
              _ssCache.sequences[sequence.key] = sequence; // assign bubbles to the sequence

              for (var j = 0; j < sequence.bubbles.length; j++) {
                sequence.bubbles[j].sequenceKey = sequence.key;
              } // create a GeoJSON LineString


              sequence.geojson = {
                type: 'LineString',
                properties: {
                  captured_at: sequence.bubbles[0] ? sequence.bubbles[0].captured_at : null,
                  captured_by: sequence.bubbles[0] ? sequence.bubbles[0].captured_by : null,
                  key: sequence.key
                },
                coordinates: sequence.bubbles.map(function (d) {
                  return d.loc;
                })
              };
            } else {
              keepLeaders.push(cache.leaders[i]);
            }
          } // couldn't complete these, save for later


          cache.leaders = keepLeaders;
        }
        /**
         * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
         */


        function getBubbles(url, tile, callback) {
          var rect = tile.extent.rectangle();
          var urlForRequest = url + utilQsString({
            n: rect[3],
            s: rect[1],
            e: rect[2],
            w: rect[0],
            c: maxResults,
            appkey: bubbleAppKey,
            jsCallback: '{callback}'
          });
          return jsonpRequest(urlForRequest, function (data) {
            if (!data || data.error) {
              callback(null);
            } else {
              callback(data);
            }
          });
        } // partition viewport into higher zoom tiles


        function partitionViewport(projection) {
          var z = geoScaleToZoom(projection.scale());
          var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5

          var tiler = utilTiler().zoomExtent([z2, z2]);
          return tiler.getTiles(projection).map(function (tile) {
            return tile.extent;
          });
        } // no more than `limit` results per partition.


        function searchLimited(limit, projection, rtree) {
          limit = limit || 5;
          return partitionViewport(projection).reduce(function (result, extent) {
            var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
              return d.data;
            });
            return found.length ? result.concat(found) : result;
          }, []);
        }
        /**
         * loadImage()
         */


        function loadImage(imgInfo) {
          return new Promise(function (resolve) {
            var img = new Image();

            img.onload = function () {
              var canvas = document.getElementById('ideditor-canvas' + imgInfo.face);
              var ctx = canvas.getContext('2d');
              ctx.drawImage(img, imgInfo.x, imgInfo.y);
              resolve({
                imgInfo: imgInfo,
                status: 'ok'
              });
            };

            img.onerror = function () {
              resolve({
                data: imgInfo,
                status: 'error'
              });
            };

            img.setAttribute('crossorigin', '');
            img.src = imgInfo.url;
          });
        }
        /**
         * loadCanvas()
         */


        function loadCanvas(imageGroup) {
          return Promise.all(imageGroup.map(loadImage)).then(function (data) {
            var canvas = document.getElementById('ideditor-canvas' + data[0].imgInfo.face);
            var which = {
              '01': 0,
              '02': 1,
              '03': 2,
              '10': 3,
              '11': 4,
              '12': 5
            };
            var face = data[0].imgInfo.face;
            _sceneOptions.cubeMap[which[face]] = canvas.toDataURL('image/jpeg', 1.0);
            return {
              status: 'loadCanvas for face ' + data[0].imgInfo.face + 'ok'
            };
          });
        }
        /**
         * loadFaces()
         */


        function loadFaces(faceGroup) {
          return Promise.all(faceGroup.map(loadCanvas)).then(function () {
            return {
              status: 'loadFaces done'
            };
          });
        }

        function setupCanvas(selection, reset) {
          if (reset) {
            selection.selectAll('#ideditor-stitcher-canvases').remove();
          } // Add the Streetside working canvases. These are used for 'stitching', or combining,
          // multiple images for each of the six faces, before passing to the Pannellum control as DataUrls


          selection.selectAll('#ideditor-stitcher-canvases').data([0]).enter().append('div').attr('id', 'ideditor-stitcher-canvases').attr('display', 'none').selectAll('canvas').data(['canvas01', 'canvas02', 'canvas03', 'canvas10', 'canvas11', 'canvas12']).enter().append('canvas').attr('id', function (d) {
            return 'ideditor-' + d;
          }).attr('width', _resolution).attr('height', _resolution);
        }

        function qkToXY(qk) {
          var x = 0;
          var y = 0;
          var scale = 256;

          for (var i = qk.length; i > 0; i--) {
            var key = qk[i - 1];
            x += +(key === '1' || key === '3') * scale;
            y += +(key === '2' || key === '3') * scale;
            scale *= 2;
          }

          return [x, y];
        }

        function getQuadKeys() {
          var dim = _resolution / 256;
          var quadKeys;

          if (dim === 16) {
            quadKeys = ['0000', '0001', '0010', '0011', '0100', '0101', '0110', '0111', '1000', '1001', '1010', '1011', '1100', '1101', '1110', '1111', '0002', '0003', '0012', '0013', '0102', '0103', '0112', '0113', '1002', '1003', '1012', '1013', '1102', '1103', '1112', '1113', '0020', '0021', '0030', '0031', '0120', '0121', '0130', '0131', '1020', '1021', '1030', '1031', '1120', '1121', '1130', '1131', '0022', '0023', '0032', '0033', '0122', '0123', '0132', '0133', '1022', '1023', '1032', '1033', '1122', '1123', '1132', '1133', '0200', '0201', '0210', '0211', '0300', '0301', '0310', '0311', '1200', '1201', '1210', '1211', '1300', '1301', '1310', '1311', '0202', '0203', '0212', '0213', '0302', '0303', '0312', '0313', '1202', '1203', '1212', '1213', '1302', '1303', '1312', '1313', '0220', '0221', '0230', '0231', '0320', '0321', '0330', '0331', '1220', '1221', '1230', '1231', '1320', '1321', '1330', '1331', '0222', '0223', '0232', '0233', '0322', '0323', '0332', '0333', '1222', '1223', '1232', '1233', '1322', '1323', '1332', '1333', '2000', '2001', '2010', '2011', '2100', '2101', '2110', '2111', '3000', '3001', '3010', '3011', '3100', '3101', '3110', '3111', '2002', '2003', '2012', '2013', '2102', '2103', '2112', '2113', '3002', '3003', '3012', '3013', '3102', '3103', '3112', '3113', '2020', '2021', '2030', '2031', '2120', '2121', '2130', '2131', '3020', '3021', '3030', '3031', '3120', '3121', '3130', '3131', '2022', '2023', '2032', '2033', '2122', '2123', '2132', '2133', '3022', '3023', '3032', '3033', '3122', '3123', '3132', '3133', '2200', '2201', '2210', '2211', '2300', '2301', '2310', '2311', '3200', '3201', '3210', '3211', '3300', '3301', '3310', '3311', '2202', '2203', '2212', '2213', '2302', '2303', '2312', '2313', '3202', '3203', '3212', '3213', '3302', '3303', '3312', '3313', '2220', '2221', '2230', '2231', '2320', '2321', '2330', '2331', '3220', '3221', '3230', '3231', '3320', '3321', '3330', '3331', '2222', '2223', '2232', '2233', '2322', '2323', '2332', '2333', '3222', '3223', '3232', '3233', '3322', '3323', '3332', '3333'];
          } else if (dim === 8) {
            quadKeys = ['000', '001', '010', '011', '100', '101', '110', '111', '002', '003', '012', '013', '102', '103', '112', '113', '020', '021', '030', '031', '120', '121', '130', '131', '022', '023', '032', '033', '122', '123', '132', '133', '200', '201', '210', '211', '300', '301', '310', '311', '202', '203', '212', '213', '302', '303', '312', '313', '220', '221', '230', '231', '320', '321', '330', '331', '222', '223', '232', '233', '322', '323', '332', '333'];
          } else if (dim === 4) {
            quadKeys = ['00', '01', '10', '11', '02', '03', '12', '13', '20', '21', '30', '31', '22', '23', '32', '33'];
          } else {
            // dim === 2
            quadKeys = ['0', '1', '2', '3'];
          }

          return quadKeys;
        }

        var serviceStreetside = {
          /**
           * init() initialize streetside.
           */
          init: function init() {
            if (!_ssCache) {
              this.reset();
            }

            this.event = utilRebind(this, dispatch$1, 'on');
          },

          /**
           * reset() reset the cache.
           */
          reset: function reset() {
            if (_ssCache) {
              Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$1);
            }

            _ssCache = {
              bubbles: {
                inflight: {},
                loaded: {},
                nextPage: {},
                rtree: new RBush(),
                points: {},
                leaders: []
              },
              sequences: {}
            };
          },

          /**
           * bubbles()
           */
          bubbles: function bubbles(projection) {
            var limit = 5;
            return searchLimited(limit, projection, _ssCache.bubbles.rtree);
          },
          cachedImage: function cachedImage(imageKey) {
            return _ssCache.bubbles.points[imageKey];
          },
          sequences: function sequences(projection) {
            var viewport = projection.clipExtent();
            var min = [viewport[0][0], viewport[1][1]];
            var max = [viewport[1][0], viewport[0][1]];
            var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
            var seen = {};
            var results = []; // all sequences for bubbles in viewport

            _ssCache.bubbles.rtree.search(bbox).forEach(function (d) {
              var key = d.data.sequenceKey;

              if (key && !seen[key]) {
                seen[key] = true;
                results.push(_ssCache.sequences[key].geojson);
              }
            });

            return results;
          },

          /**
           * loadBubbles()
           */
          loadBubbles: function loadBubbles(projection, margin) {
            // by default: request 2 nearby tiles so we can connect sequences.
            if (margin === undefined) margin = 2;
            loadTiles('bubbles', bubbleApi, projection, margin);
          },
          viewer: function viewer() {
            return _pannellumViewer;
          },
          initViewer: function initViewer() {
            if (!window.pannellum) return;
            if (_pannellumViewer) return;
            _currScene += 1;

            var sceneID = _currScene.toString();

            var options = {
              'default': {
                firstScene: sceneID
              },
              scenes: {}
            };
            options.scenes[sceneID] = _sceneOptions;
            _pannellumViewer = window.pannellum.viewer('ideditor-viewer-streetside', options);
          },
          ensureViewerLoaded: function ensureViewerLoaded(context) {
            if (_loadViewerPromise) return _loadViewerPromise; // create ms-wrapper, a photo wrapper class

            var wrap = context.container().select('.photoviewer').selectAll('.ms-wrapper').data([0]); // inject ms-wrapper into the photoviewer div
            // (used by all to house each custom photo viewer)

            var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper ms-wrapper').classed('hide', true);
            var that = this;
            var pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // inject div to support streetside viewer (pannellum) and attribution line

            wrapEnter.append('div').attr('id', 'ideditor-viewer-streetside').on(pointerPrefix + 'down.streetside', function () {
              select(window).on(pointerPrefix + 'move.streetside', function () {
                dispatch$1.call('viewerChanged');
              }, true);
            }).on(pointerPrefix + 'up.streetside pointercancel.streetside', function () {
              select(window).on(pointerPrefix + 'move.streetside', null); // continue dispatching events for a few seconds, in case viewer has inertia.

              var t = timer(function (elapsed) {
                dispatch$1.call('viewerChanged');

                if (elapsed > 2000) {
                  t.stop();
                }
              });
            }).append('div').attr('class', 'photo-attribution fillD');
            var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
            controlsEnter.append('button').on('click.back', step(-1)).html('◄');
            controlsEnter.append('button').on('click.forward', step(1)).html('►'); // create working canvas for stitching together images

            wrap = wrap.merge(wrapEnter).call(setupCanvas, true); // Register viewer resize handler

            context.ui().photoviewer.on('resize.streetside', function () {
              if (_pannellumViewer) {
                _pannellumViewer.resize();
              }
            });
            _loadViewerPromise = new Promise(function (resolve, reject) {
              var loadedCount = 0;

              function loaded() {
                loadedCount += 1; // wait until both files are loaded

                if (loadedCount === 2) resolve();
              }

              var head = select('head'); // load streetside pannellum viewer css

              head.selectAll('#ideditor-streetside-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-streetside-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(pannellumViewerCSS)).on('load.serviceStreetside', loaded).on('error.serviceStreetside', function () {
                reject();
              }); // load streetside pannellum viewer js

              head.selectAll('#ideditor-streetside-viewerjs').data([0]).enter().append('script').attr('id', 'ideditor-streetside-viewerjs').attr('crossorigin', 'anonymous').attr('src', context.asset(pannellumViewerJS)).on('load.serviceStreetside', loaded).on('error.serviceStreetside', function () {
                reject();
              });
            })["catch"](function () {
              _loadViewerPromise = null;
            });
            return _loadViewerPromise;

            function step(stepBy) {
              return function () {
                var viewer = context.container().select('.photoviewer');
                var selected = viewer.empty() ? undefined : viewer.datum();
                if (!selected) return;
                var nextID = stepBy === 1 ? selected.ne : selected.pr;

                var yaw = _pannellumViewer.getYaw();

                var ca = selected.ca + yaw;
                var origin = selected.loc; // construct a search trapezoid pointing out from current bubble

                var meters = 35;
                var p1 = [origin[0] + geoMetersToLon(meters / 5, origin[1]), origin[1]];
                var p2 = [origin[0] + geoMetersToLon(meters / 2, origin[1]), origin[1] + geoMetersToLat(meters)];
                var p3 = [origin[0] - geoMetersToLon(meters / 2, origin[1]), origin[1] + geoMetersToLat(meters)];
                var p4 = [origin[0] - geoMetersToLon(meters / 5, origin[1]), origin[1]];
                var poly = [p1, p2, p3, p4, p1]; // rotate it to face forward/backward

                var angle = (stepBy === 1 ? ca : ca + 180) * (Math.PI / 180);
                poly = geoRotate(poly, -angle, origin);
                var extent = poly.reduce(function (extent, point) {
                  return extent.extend(geoExtent(point));
                }, geoExtent()); // find nearest other bubble in the search polygon

                var minDist = Infinity;

                _ssCache.bubbles.rtree.search(extent.bbox()).forEach(function (d) {
                  if (d.data.key === selected.key) return;
                  if (!geoPointInPolygon(d.data.loc, poly)) return;
                  var dist = geoVecLength(d.data.loc, selected.loc);
                  var theta = selected.ca - d.data.ca;
                  var minTheta = Math.min(Math.abs(theta), 360 - Math.abs(theta));

                  if (minTheta > 20) {
                    dist += 5; // penalize distance if camera angles don't match
                  }

                  if (dist < minDist) {
                    nextID = d.data.key;
                    minDist = dist;
                  }
                });

                var nextBubble = nextID && that.cachedImage(nextID);
                if (!nextBubble) return;
                context.map().centerEase(nextBubble.loc);
                that.selectImage(context, nextBubble.key).yaw(yaw).showViewer(context);
              };
            }
          },
          yaw: function yaw(_yaw) {
            if (typeof _yaw !== 'number') return _yaw;
            _sceneOptions.yaw = _yaw;
            return this;
          },

          /**
           * showViewer()
           */
          showViewer: function showViewer(context) {
            var wrap = context.container().select('.photoviewer').classed('hide', false);
            var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();

            if (isHidden) {
              wrap.selectAll('.photo-wrapper:not(.ms-wrapper)').classed('hide', true);
              wrap.selectAll('.photo-wrapper.ms-wrapper').classed('hide', false);
            }

            return this;
          },

          /**
           * hideViewer()
           */
          hideViewer: function hideViewer(context) {
            var viewer = context.container().select('.photoviewer');
            if (!viewer.empty()) viewer.datum(null);
            viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
            context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
            this.updateUrlImage(null);
            return this.setStyles(context, null, true);
          },

          /**
           * selectImage().
           */
          selectImage: function selectImage(context, key) {
            var that = this;
            var d = this.cachedImage(key);
            var viewer = context.container().select('.photoviewer');
            if (!viewer.empty()) viewer.datum(d);
            this.setStyles(context, null, true);
            var wrap = context.container().select('.photoviewer .ms-wrapper');
            var attribution = wrap.selectAll('.photo-attribution').html('');
            wrap.selectAll('.pnlm-load-box') // display "loading.."
            .style('display', 'block');
            if (!d) return this;
            this.updateUrlImage(key);
            _sceneOptions.northOffset = d.ca;
            var line1 = attribution.append('div').attr('class', 'attribution-row');
            var hiresDomId = utilUniqueDomId('streetside-hires'); // Add hires checkbox

            var label = line1.append('label').attr('for', hiresDomId).attr('class', 'streetside-hires');
            label.append('input').attr('type', 'checkbox').attr('id', hiresDomId).property('checked', _hires).on('click', function (d3_event) {
              d3_event.stopPropagation();
              _hires = !_hires;
              _resolution = _hires ? 1024 : 512;
              wrap.call(setupCanvas, true);
              var viewstate = {
                yaw: _pannellumViewer.getYaw(),
                pitch: _pannellumViewer.getPitch(),
                hfov: _pannellumViewer.getHfov()
              };
              _sceneOptions = Object.assign(_sceneOptions, viewstate);
              that.selectImage(context, d.key).showViewer(context);
            });
            label.append('span').html(_t.html('streetside.hires'));
            var captureInfo = line1.append('div').attr('class', 'attribution-capture-info'); // Add capture date

            if (d.captured_by) {
              var yyyy = new Date().getFullYear();
              captureInfo.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://www.microsoft.com/en-us/maps/streetside').html('©' + yyyy + ' Microsoft');
              captureInfo.append('span').html('|');
            }

            if (d.captured_at) {
              captureInfo.append('span').attr('class', 'captured_at').html(localeTimestamp(d.captured_at));
            } // Add image links


            var line2 = attribution.append('div').attr('class', 'attribution-row');
            line2.append('a').attr('class', 'image-view-link').attr('target', '_blank').attr('href', 'https://www.bing.com/maps?cp=' + d.loc[1] + '~' + d.loc[0] + '&lvl=17&dir=' + d.ca + '&style=x&v=2&sV=1').html(_t.html('streetside.view_on_bing'));
            line2.append('a').attr('class', 'image-report-link').attr('target', '_blank').attr('href', 'https://www.bing.com/maps/privacyreport/streetsideprivacyreport?bubbleid=' + encodeURIComponent(d.key) + '&focus=photo&lat=' + d.loc[1] + '&lng=' + d.loc[0] + '&z=17').html(_t.html('streetside.report'));
            var bubbleIdQuadKey = d.key.toString(4);
            var paddingNeeded = 16 - bubbleIdQuadKey.length;

            for (var i = 0; i < paddingNeeded; i++) {
              bubbleIdQuadKey = '0' + bubbleIdQuadKey;
            }

            var imgUrlPrefix = streetsideImagesApi + 'hs' + bubbleIdQuadKey;
            var imgUrlSuffix = '.jpg?g=6338&n=z'; // Cubemap face code order matters here: front=01, right=02, back=03, left=10, up=11, down=12

            var faceKeys = ['01', '02', '03', '10', '11', '12']; // Map images to cube faces

            var quadKeys = getQuadKeys();
            var faces = faceKeys.map(function (faceKey) {
              return quadKeys.map(function (quadKey) {
                var xy = qkToXY(quadKey);
                return {
                  face: faceKey,
                  url: imgUrlPrefix + faceKey + quadKey + imgUrlSuffix,
                  x: xy[0],
                  y: xy[1]
                };
              });
            });
            loadFaces(faces).then(function () {
              if (!_pannellumViewer) {
                that.initViewer();
              } else {
                // make a new scene
                _currScene += 1;

                var sceneID = _currScene.toString();

                _pannellumViewer.addScene(sceneID, _sceneOptions).loadScene(sceneID); // remove previous scene


                if (_currScene > 2) {
                  sceneID = (_currScene - 1).toString();

                  _pannellumViewer.removeScene(sceneID);
                }
              }
            });
            return this;
          },
          getSequenceKeyForBubble: function getSequenceKeyForBubble(d) {
            return d && d.sequenceKey;
          },
          // Updates the currently highlighted sequence and selected bubble.
          // Reset is only necessary when interacting with the viewport because
          // this implicitly changes the currently selected bubble/sequence
          setStyles: function setStyles(context, hovered, reset) {
            if (reset) {
              // reset all layers
              context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false).classed('currentView', false);
              context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
            }

            var hoveredBubbleKey = hovered && hovered.key;
            var hoveredSequenceKey = this.getSequenceKeyForBubble(hovered);
            var hoveredSequence = hoveredSequenceKey && _ssCache.sequences[hoveredSequenceKey];
            var hoveredBubbleKeys = hoveredSequence && hoveredSequence.bubbles.map(function (d) {
              return d.key;
            }) || [];
            var viewer = context.container().select('.photoviewer');
            var selected = viewer.empty() ? undefined : viewer.datum();
            var selectedBubbleKey = selected && selected.key;
            var selectedSequenceKey = this.getSequenceKeyForBubble(selected);
            var selectedSequence = selectedSequenceKey && _ssCache.sequences[selectedSequenceKey];
            var selectedBubbleKeys = selectedSequence && selectedSequence.bubbles.map(function (d) {
              return d.key;
            }) || []; // highlight sibling viewfields on either the selected or the hovered sequences

            var highlightedBubbleKeys = utilArrayUnion(hoveredBubbleKeys, selectedBubbleKeys);
            context.container().selectAll('.layer-streetside-images .viewfield-group').classed('highlighted', function (d) {
              return highlightedBubbleKeys.indexOf(d.key) !== -1;
            }).classed('hovered', function (d) {
              return d.key === hoveredBubbleKey;
            }).classed('currentView', function (d) {
              return d.key === selectedBubbleKey;
            });
            context.container().selectAll('.layer-streetside-images .sequence').classed('highlighted', function (d) {
              return d.properties.key === hoveredSequenceKey;
            }).classed('currentView', function (d) {
              return d.properties.key === selectedSequenceKey;
            }); // update viewfields if needed

            context.container().selectAll('.layer-streetside-images .viewfield-group .viewfield').attr('d', viewfieldPath);

            function viewfieldPath() {
              var d = this.parentNode.__data__;

              if (d.pano && d.key !== selectedBubbleKey) {
                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
              } else {
                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
              }
            }

            return this;
          },
          updateUrlImage: function updateUrlImage(imageKey) {
            if (!window.mocha) {
              var hash = utilStringQs(window.location.hash);

              if (imageKey) {
                hash.photo = 'streetside/' + imageKey;
              } else {
                delete hash.photo;
              }

              window.location.replace('#' + utilQsString(hash, true));
            }
          },

          /**
           * cache().
           */
          cache: function cache() {
            return _ssCache;
          }
        };

        var _apibase = 'https://taginfo.openstreetmap.org/api/4/';
        var _inflight = {};
        var _popularKeys = {};
        var _taginfoCache = {};
        var tag_sorts = {
          point: 'count_nodes',
          vertex: 'count_nodes',
          area: 'count_ways',
          line: 'count_ways'
        };
        var tag_sort_members = {
          point: 'count_node_members',
          vertex: 'count_node_members',
          area: 'count_way_members',
          line: 'count_way_members',
          relation: 'count_relation_members'
        };
        var tag_filters = {
          point: 'nodes',
          vertex: 'nodes',
          area: 'ways',
          line: 'ways'
        };
        var tag_members_fractions = {
          point: 'count_node_members_fraction',
          vertex: 'count_node_members_fraction',
          area: 'count_way_members_fraction',
          line: 'count_way_members_fraction',
          relation: 'count_relation_members_fraction'
        };

        function sets(params, n, o) {
          if (params.geometry && o[params.geometry]) {
            params[n] = o[params.geometry];
          }

          return params;
        }

        function setFilter(params) {
          return sets(params, 'filter', tag_filters);
        }

        function setSort(params) {
          return sets(params, 'sortname', tag_sorts);
        }

        function setSortMembers(params) {
          return sets(params, 'sortname', tag_sort_members);
        }

        function clean(params) {
          return utilObjectOmit(params, ['geometry', 'debounce']);
        }

        function filterKeys(type) {
          var count_type = type ? 'count_' + type : 'count_all';
          return function (d) {
            return parseFloat(d[count_type]) > 2500 || d.in_wiki;
          };
        }

        function filterMultikeys(prefix) {
          return function (d) {
            // d.key begins with prefix, and d.key contains no additional ':'s
            var re = new RegExp('^' + prefix + '(.*)$');
            var matches = d.key.match(re) || [];
            return matches.length === 2 && matches[1].indexOf(':') === -1;
          };
        }

        function filterValues(allowUpperCase) {
          return function (d) {
            if (d.value.match(/[;,]/) !== null) return false; // exclude some punctuation

            if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) return false; // exclude uppercase letters

            return parseFloat(d.fraction) > 0.0;
          };
        }

        function filterRoles(geometry) {
          return function (d) {
            if (d.role === '') return false; // exclude empty role

            if (d.role.match(/[A-Z*;,]/) !== null) return false; // exclude uppercase letters and some punctuation

            return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
          };
        }

        function valKey(d) {
          return {
            value: d.key,
            title: d.key
          };
        }

        function valKeyDescription(d) {
          var obj = {
            value: d.value,
            title: d.description || d.value
          };

          if (d.count) {
            obj.count = d.count;
          }

          return obj;
        }

        function roleKey(d) {
          return {
            value: d.role,
            title: d.role
          };
        } // sort keys with ':' lower than keys without ':'


        function sortKeys(a, b) {
          return a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1 ? -1 : a.key.indexOf(':') !== -1 && b.key.indexOf(':') === -1 ? 1 : 0;
        }

        var debouncedRequest = debounce(request, 300, {
          leading: false
        });

        function request(url, params, exactMatch, callback, loaded) {
          if (_inflight[url]) return;
          if (checkCache(url, params, exactMatch, callback)) return;
          var controller = new AbortController();
          _inflight[url] = controller;
          d3_json(url, {
            signal: controller.signal
          }).then(function (result) {
            delete _inflight[url];
            if (loaded) loaded(null, result);
          })["catch"](function (err) {
            delete _inflight[url];
            if (err.name === 'AbortError') return;
            if (loaded) loaded(err.message);
          });
        }

        function checkCache(url, params, exactMatch, callback) {
          var rp = params.rp || 25;
          var testQuery = params.query || '';
          var testUrl = url;

          do {
            var hit = _taginfoCache[testUrl]; // exact match, or shorter match yielding fewer than max results (rp)

            if (hit && (url === testUrl || hit.length < rp)) {
              callback(null, hit);
              return true;
            } // don't try to shorten the query


            if (exactMatch || !testQuery.length) return false; // do shorten the query to see if we already have a cached result
            // that has returned fewer than max results (rp)

            testQuery = testQuery.slice(0, -1);
            testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
          } while (testQuery.length >= 0);

          return false;
        }

        var serviceTaginfo = {
          init: function init() {
            _inflight = {};
            _taginfoCache = {};
            _popularKeys = {
              // manually exclude some keys – #5377, #7485
              postal_code: true,
              full_name: true,
              loc_name: true,
              reg_name: true,
              short_name: true,
              sorting_name: true,
              artist_name: true,
              nat_name: true,
              long_name: true,
              'bridge:name': true
            }; // Fetch popular keys.  We'll exclude these from `values`
            // lookups because they stress taginfo, and they aren't likely
            // to yield meaningful autocomplete results.. see #3955

            var params = {
              rp: 100,
              sortname: 'values_all',
              sortorder: 'desc',
              page: 1,
              debounce: false,
              lang: _mainLocalizer.languageCode()
            };
            this.keys(params, function (err, data) {
              if (err) return;
              data.forEach(function (d) {
                if (d.value === 'opening_hours') return; // exception

                _popularKeys[d.value] = true;
              });
            });
          },
          reset: function reset() {
            Object.values(_inflight).forEach(function (controller) {
              controller.abort();
            });
            _inflight = {};
          },
          keys: function keys(params, callback) {
            var doRequest = params.debounce ? debouncedRequest : request;
            params = clean(setSort(params));
            params = Object.assign({
              rp: 10,
              sortname: 'count_all',
              sortorder: 'desc',
              page: 1,
              lang: _mainLocalizer.languageCode()
            }, params);
            var url = _apibase + 'keys/all?' + utilQsString(params);
            doRequest(url, params, false, callback, function (err, d) {
              if (err) {
                callback(err);
              } else {
                var f = filterKeys(params.filter);
                var result = d.data.filter(f).sort(sortKeys).map(valKey);
                _taginfoCache[url] = result;
                callback(null, result);
              }
            });
          },
          multikeys: function multikeys(params, callback) {
            var doRequest = params.debounce ? debouncedRequest : request;
            params = clean(setSort(params));
            params = Object.assign({
              rp: 25,
              sortname: 'count_all',
              sortorder: 'desc',
              page: 1,
              lang: _mainLocalizer.languageCode()
            }, params);
            var prefix = params.query;
            var url = _apibase + 'keys/all?' + utilQsString(params);
            doRequest(url, params, true, callback, function (err, d) {
              if (err) {
                callback(err);
              } else {
                var f = filterMultikeys(prefix);
                var result = d.data.filter(f).map(valKey);
                _taginfoCache[url] = result;
                callback(null, result);
              }
            });
          },
          values: function values(params, callback) {
            // Exclude popular keys from values lookups.. see #3955
            var key = params.key;

            if (key && _popularKeys[key]) {
              callback(null, []);
              return;
            }

            var doRequest = params.debounce ? debouncedRequest : request;
            params = clean(setSort(setFilter(params)));
            params = Object.assign({
              rp: 25,
              sortname: 'count_all',
              sortorder: 'desc',
              page: 1,
              lang: _mainLocalizer.languageCode()
            }, params);
            var url = _apibase + 'key/values?' + utilQsString(params);
            doRequest(url, params, false, callback, function (err, d) {
              if (err) {
                callback(err);
              } else {
                // In most cases we prefer taginfo value results with lowercase letters.
                // A few OSM keys expect values to contain uppercase values (see #3377).
                // This is not an exhaustive list (e.g. `name` also has uppercase values)
                // but these are the fields where taginfo value lookup is most useful.
                var re = /network|taxon|genus|species|brand|grape_variety|royal_cypher|listed_status|booth|rating|stars|:output|_hours|_times|_ref|manufacturer|country|target|brewery/;
                var allowUpperCase = re.test(params.key);
                var f = filterValues(allowUpperCase);
                var result = d.data.filter(f).map(valKeyDescription);
                _taginfoCache[url] = result;
                callback(null, result);
              }
            });
          },
          roles: function roles(params, callback) {
            var doRequest = params.debounce ? debouncedRequest : request;
            var geometry = params.geometry;
            params = clean(setSortMembers(params));
            params = Object.assign({
              rp: 25,
              sortname: 'count_all_members',
              sortorder: 'desc',
              page: 1,
              lang: _mainLocalizer.languageCode()
            }, params);
            var url = _apibase + 'relation/roles?' + utilQsString(params);
            doRequest(url, params, true, callback, function (err, d) {
              if (err) {
                callback(err);
              } else {
                var f = filterRoles(geometry);
                var result = d.data.filter(f).map(roleKey);
                _taginfoCache[url] = result;
                callback(null, result);
              }
            });
          },
          docs: function docs(params, callback) {
            var doRequest = params.debounce ? debouncedRequest : request;
            params = clean(setSort(params));
            var path = 'key/wiki_pages?';

            if (params.value) {
              path = 'tag/wiki_pages?';
            } else if (params.rtype) {
              path = 'relation/wiki_pages?';
            }

            var url = _apibase + path + utilQsString(params);
            doRequest(url, params, true, callback, function (err, d) {
              if (err) {
                callback(err);
              } else {
                _taginfoCache[url] = d.data;
                callback(null, d.data);
              }
            });
          },
          apibase: function apibase(_) {
            if (!arguments.length) return _apibase;
            _apibase = _;
            return this;
          }
        };

        /**
         * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
         *
         * @name feature
         * @param {Geometry} geometry input geometry
         * @param {Object} [properties={}] an Object of key-value pairs to add as properties
         * @param {Object} [options={}] Optional Parameters
         * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
         * @param {string|number} [options.id] Identifier associated with the Feature
         * @returns {Feature} a GeoJSON Feature
         * @example
         * var geometry = {
         *   "type": "Point",
         *   "coordinates": [110, 50]
         * };
         *
         * var feature = turf.feature(geometry);
         *
         * //=feature
         */

        function feature(geom, properties, options) {
          if (options === void 0) {
            options = {};
          }

          var feat = {
            type: "Feature"
          };

          if (options.id === 0 || options.id) {
            feat.id = options.id;
          }

          if (options.bbox) {
            feat.bbox = options.bbox;
          }

          feat.properties = properties || {};
          feat.geometry = geom;
          return feat;
        }
        /**
         * Creates a {@link Polygon} {@link Feature} from an Array of LinearRings.
         *
         * @name polygon
         * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
         * @param {Object} [properties={}] an Object of key-value pairs to add as properties
         * @param {Object} [options={}] Optional Parameters
         * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
         * @param {string|number} [options.id] Identifier associated with the Feature
         * @returns {Feature<Polygon>} Polygon Feature
         * @example
         * var polygon = turf.polygon([[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]], { name: 'poly1' });
         *
         * //=polygon
         */

        function polygon(coordinates, properties, options) {
          if (options === void 0) {
            options = {};
          }

          for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
            var ring = coordinates_1[_i];

            if (ring.length < 4) {
              throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
            }

            for (var j = 0; j < ring[ring.length - 1].length; j++) {
              // Check if first point of Polygon contains two numbers
              if (ring[ring.length - 1][j] !== ring[0][j]) {
                throw new Error("First and last Position are not equivalent.");
              }
            }
          }

          var geom = {
            type: "Polygon",
            coordinates: coordinates
          };
          return feature(geom, properties, options);
        }
        /**
         * Creates a {@link LineString} {@link Feature} from an Array of Positions.
         *
         * @name lineString
         * @param {Array<Array<number>>} coordinates an array of Positions
         * @param {Object} [properties={}] an Object of key-value pairs to add as properties
         * @param {Object} [options={}] Optional Parameters
         * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
         * @param {string|number} [options.id] Identifier associated with the Feature
         * @returns {Feature<LineString>} LineString Feature
         * @example
         * var linestring1 = turf.lineString([[-24, 63], [-23, 60], [-25, 65], [-20, 69]], {name: 'line 1'});
         * var linestring2 = turf.lineString([[-14, 43], [-13, 40], [-15, 45], [-10, 49]], {name: 'line 2'});
         *
         * //=linestring1
         * //=linestring2
         */

        function lineString(coordinates, properties, options) {
          if (options === void 0) {
            options = {};
          }

          if (coordinates.length < 2) {
            throw new Error("coordinates must be an array of two or more positions");
          }

          var geom = {
            type: "LineString",
            coordinates: coordinates
          };
          return feature(geom, properties, options);
        }
        /**
         * Creates a {@link Feature<MultiLineString>} based on a
         * coordinate array. Properties can be added optionally.
         *
         * @name multiLineString
         * @param {Array<Array<Array<number>>>} coordinates an array of LineStrings
         * @param {Object} [properties={}] an Object of key-value pairs to add as properties
         * @param {Object} [options={}] Optional Parameters
         * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
         * @param {string|number} [options.id] Identifier associated with the Feature
         * @returns {Feature<MultiLineString>} a MultiLineString feature
         * @throws {Error} if no coordinates are passed
         * @example
         * var multiLine = turf.multiLineString([[[0,0],[10,10]]]);
         *
         * //=multiLine
         */

        function multiLineString(coordinates, properties, options) {
          if (options === void 0) {
            options = {};
          }

          var geom = {
            type: "MultiLineString",
            coordinates: coordinates
          };
          return feature(geom, properties, options);
        }
        /**
         * Creates a {@link Feature<MultiPolygon>} based on a
         * coordinate array. Properties can be added optionally.
         *
         * @name multiPolygon
         * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygons
         * @param {Object} [properties={}] an Object of key-value pairs to add as properties
         * @param {Object} [options={}] Optional Parameters
         * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
         * @param {string|number} [options.id] Identifier associated with the Feature
         * @returns {Feature<MultiPolygon>} a multipolygon feature
         * @throws {Error} if no coordinates are passed
         * @example
         * var multiPoly = turf.multiPolygon([[[[0,0],[0,10],[10,10],[10,0],[0,0]]]]);
         *
         * //=multiPoly
         *
         */

        function multiPolygon(coordinates, properties, options) {
          if (options === void 0) {
            options = {};
          }

          var geom = {
            type: "MultiPolygon",
            coordinates: coordinates
          };
          return feature(geom, properties, options);
        }

        /**
         * Get Geometry from Feature or Geometry Object
         *
         * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
         * @returns {Geometry|null} GeoJSON Geometry Object
         * @throws {Error} if geojson is not a Feature or Geometry Object
         * @example
         * var point = {
         *   "type": "Feature",
         *   "properties": {},
         *   "geometry": {
         *     "type": "Point",
         *     "coordinates": [110, 40]
         *   }
         * }
         * var geom = turf.getGeom(point)
         * //={"type": "Point", "coordinates": [110, 40]}
         */

        function getGeom(geojson) {
          if (geojson.type === "Feature") {
            return geojson.geometry;
          }

          return geojson;
        }

        // Cohen-Sutherland line clipping algorithm, adapted to efficiently
        // handle polylines rather than just segments
        function lineclip(points, bbox, result) {
          var len = points.length,
              codeA = bitCode(points[0], bbox),
              part = [],
              i,
              codeB,
              lastCode;
          var a;
          var b;
          if (!result) result = [];

          for (i = 1; i < len; i++) {
            a = points[i - 1];
            b = points[i];
            codeB = lastCode = bitCode(b, bbox);

            while (true) {
              if (!(codeA | codeB)) {
                // accept
                part.push(a);

                if (codeB !== lastCode) {
                  // segment went outside
                  part.push(b);

                  if (i < len - 1) {
                    // start a new line
                    result.push(part);
                    part = [];
                  }
                } else if (i === len - 1) {
                  part.push(b);
                }

                break;
              } else if (codeA & codeB) {
                // trivial reject
                break;
              } else if (codeA) {
                // a outside, intersect with clip edge
                a = intersect(a, b, codeA, bbox);
                codeA = bitCode(a, bbox);
              } else {
                // b outside
                b = intersect(a, b, codeB, bbox);
                codeB = bitCode(b, bbox);
              }
            }

            codeA = lastCode;
          }

          if (part.length) result.push(part);
          return result;
        } // Sutherland-Hodgeman polygon clipping algorithm

        function polygonclip(points, bbox) {
          var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle

          for (edge = 1; edge <= 8; edge *= 2) {
            result = [];
            prev = points[points.length - 1];
            prevInside = !(bitCode(prev, bbox) & edge);

            for (i = 0; i < points.length; i++) {
              p = points[i];
              inside = !(bitCode(p, bbox) & edge); // if segment goes through the clip window, add an intersection

              if (inside !== prevInside) result.push(intersect(prev, p, edge, bbox));
              if (inside) result.push(p); // add a point if it's inside

              prev = p;
              prevInside = inside;
            }

            points = result;
            if (!points.length) break;
          }

          return result;
        } // intersect a segment against one of the 4 lines that make up the bbox

        function intersect(a, b, edge, bbox) {
          return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] // top
          : edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] // bottom
          : edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] // right
          : edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] // left
          : null;
        } // bit code reflects the point position relative to the bbox:
        //         left  mid  right
        //    top  1001  1000  1010
        //    mid  0001  0000  0010
        // bottom  0101  0100  0110


        function bitCode(p, bbox) {
          var code = 0;
          if (p[0] < bbox[0]) code |= 1; // left
          else if (p[0] > bbox[2]) code |= 2; // right

          if (p[1] < bbox[1]) code |= 4; // bottom
          else if (p[1] > bbox[3]) code |= 8; // top

          return code;
        }

        /**
         * Takes a {@link Feature} and a bbox and clips the feature to the bbox using
         * [lineclip](https://github.com/mapbox/lineclip).
         * May result in degenerate edges when clipping Polygons.
         *
         * @name bboxClip
         * @param {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature feature to clip to the bbox
         * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
         * @returns {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} clipped Feature
         * @example
         * var bbox = [0, 0, 10, 10];
         * var poly = turf.polygon([[[2, 2], [8, 4], [12, 8], [3, 7], [2, 2]]]);
         *
         * var clipped = turf.bboxClip(poly, bbox);
         *
         * //addToMap
         * var addToMap = [bbox, poly, clipped]
         */

        function bboxClip(feature, bbox) {
          var geom = getGeom(feature);
          var type = geom.type;
          var properties = feature.type === "Feature" ? feature.properties : {};
          var coords = geom.coordinates;

          switch (type) {
            case "LineString":
            case "MultiLineString":
              var lines_1 = [];

              if (type === "LineString") {
                coords = [coords];
              }

              coords.forEach(function (line) {
                lineclip(line, bbox, lines_1);
              });

              if (lines_1.length === 1) {
                return lineString(lines_1[0], properties);
              }

              return multiLineString(lines_1, properties);

            case "Polygon":
              return polygon(clipPolygon(coords, bbox), properties);

            case "MultiPolygon":
              return multiPolygon(coords.map(function (poly) {
                return clipPolygon(poly, bbox);
              }), properties);

            default:
              throw new Error("geometry " + type + " not supported");
          }
        }

        function clipPolygon(rings, bbox) {
          var outRings = [];

          for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
            var ring = rings_1[_i];
            var clipped = polygonclip(ring, bbox);

            if (clipped.length > 0) {
              if (clipped[0][0] !== clipped[clipped.length - 1][0] || clipped[0][1] !== clipped[clipped.length - 1][1]) {
                clipped.push(clipped[0]);
              }

              if (clipped.length >= 4) {
                outRings.push(clipped);
              }
            }
          }

          return outRings;
        }

        var tiler = utilTiler().tileSize(512).margin(1);
        var dispatch = dispatch$8('loadedData');

        var _vtCache;

        function abortRequest(controller) {
          controller.abort();
        }

        function vtToGeoJSON(data, tile, mergeCache) {
          var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
          var layers = Object.keys(vectorTile$1.layers);

          if (!Array.isArray(layers)) {
            layers = [layers];
          }

          var features = [];
          layers.forEach(function (layerID) {
            var layer = vectorTile$1.layers[layerID];

            if (layer) {
              for (var i = 0; i < layer.length; i++) {
                var feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
                var geometry = feature.geometry; // Treat all Polygons as MultiPolygons

                if (geometry.type === 'Polygon') {
                  geometry.type = 'MultiPolygon';
                  geometry.coordinates = [geometry.coordinates];
                }

                var isClipped = false; // Clip to tile bounds

                if (geometry.type === 'MultiPolygon') {
                  var featureClip = bboxClip(feature, tile.extent.rectangle());

                  if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
                    // feature = featureClip;
                    isClipped = true;
                  }

                  if (!feature.geometry.coordinates.length) continue; // not actually on this tile

                  if (!feature.geometry.coordinates[0].length) continue; // not actually on this tile
                } // Generate some unique IDs and add some metadata


                var featurehash = utilHashcode(fastJsonStableStringify(feature));
                var propertyhash = utilHashcode(fastJsonStableStringify(feature.properties || {}));
                feature.__layerID__ = layerID.replace(/[^_a-zA-Z0-9\-]/g, '_');
                feature.__featurehash__ = featurehash;
                feature.__propertyhash__ = propertyhash;
                features.push(feature); // Clipped Polygons at same zoom with identical properties can get merged

                if (isClipped && geometry.type === 'MultiPolygon') {
                  var merged = mergeCache[propertyhash];

                  if (merged && merged.length) {
                    var other = merged[0];
                    var coords = index.union(feature.geometry.coordinates, other.geometry.coordinates);

                    if (!coords || !coords.length) {
                      continue; // something failed in polygon union
                    }

                    merged.push(feature);

                    for (var j = 0; j < merged.length; j++) {
                      // all these features get...
                      merged[j].geometry.coordinates = coords; // same coords

                      merged[j].__featurehash__ = featurehash; // same hash, so deduplication works
                    }
                  } else {
                    mergeCache[propertyhash] = [feature];
                  }
                }
              }
            }
          });
          return features;
        }

        function loadTile(source, tile) {
          if (source.loaded[tile.id] || source.inflight[tile.id]) return;
          var url = source.template.replace('{x}', tile.xyz[0]).replace('{y}', tile.xyz[1]) // TMS-flipped y coordinate
          .replace(/\{[t-]y\}/, Math.pow(2, tile.xyz[2]) - tile.xyz[1] - 1).replace(/\{z(oom)?\}/, tile.xyz[2]).replace(/\{switch:([^}]+)\}/, function (s, r) {
            var subdomains = r.split(',');
            return subdomains[(tile.xyz[0] + tile.xyz[1]) % subdomains.length];
          });
          var controller = new AbortController();
          source.inflight[tile.id] = controller;
          fetch(url, {
            signal: controller.signal
          }).then(function (response) {
            if (!response.ok) {
              throw new Error(response.status + ' ' + response.statusText);
            }

            source.loaded[tile.id] = [];
            delete source.inflight[tile.id];
            return response.arrayBuffer();
          }).then(function (data) {
            if (!data) {
              throw new Error('No Data');
            }

            var z = tile.xyz[2];

            if (!source.canMerge[z]) {
              source.canMerge[z] = {}; // initialize mergeCache
            }

            source.loaded[tile.id] = vtToGeoJSON(data, tile, source.canMerge[z]);
            dispatch.call('loadedData');
          })["catch"](function () {
            source.loaded[tile.id] = [];
            delete source.inflight[tile.id];
          });
        }

        var serviceVectorTile = {
          init: function init() {
            if (!_vtCache) {
              this.reset();
            }

            this.event = utilRebind(this, dispatch, 'on');
          },
          reset: function reset() {
            for (var sourceID in _vtCache) {
              var source = _vtCache[sourceID];

              if (source && source.inflight) {
                Object.values(source.inflight).forEach(abortRequest);
              }
            }

            _vtCache = {};
          },
          addSource: function addSource(sourceID, template) {
            _vtCache[sourceID] = {
              template: template,
              inflight: {},
              loaded: {},
              canMerge: {}
            };
            return _vtCache[sourceID];
          },
          data: function data(sourceID, projection) {
            var source = _vtCache[sourceID];
            if (!source) return [];
            var tiles = tiler.getTiles(projection);
            var seen = {};
            var results = [];

            for (var i = 0; i < tiles.length; i++) {
              var features = source.loaded[tiles[i].id];
              if (!features || !features.length) continue;

              for (var j = 0; j < features.length; j++) {
                var feature = features[j];
                var hash = feature.__featurehash__;
                if (seen[hash]) continue;
                seen[hash] = true; // return a shallow copy, because the hash may change
                // later if this feature gets merged with another

                results.push(Object.assign({}, feature)); // shallow copy
              }
            }

            return results;
          },
          loadTiles: function loadTiles(sourceID, template, projection) {
            var source = _vtCache[sourceID];

            if (!source) {
              source = this.addSource(sourceID, template);
            }

            var tiles = tiler.getTiles(projection); // abort inflight requests that are no longer needed

            Object.keys(source.inflight).forEach(function (k) {
              var wanted = tiles.find(function (tile) {
                return k === tile.id;
              });

              if (!wanted) {
                abortRequest(source.inflight[k]);
                delete source.inflight[k];
              }
            });
            tiles.forEach(function (tile) {
              loadTile(source, tile);
            });
          },
          cache: function cache() {
            return _vtCache;
          }
        };

        var apibase = 'https://www.wikidata.org/w/api.php?';
        var _wikidataCache = {};
        var serviceWikidata = {
          init: function init() {},
          reset: function reset() {
            _wikidataCache = {};
          },
          // Search for Wikidata items matching the query
          itemsForSearchQuery: function itemsForSearchQuery(query, callback) {
            if (!query) {
              if (callback) callback('No query', {});
              return;
            }

            var lang = this.languagesToQuery()[0];
            var url = apibase + utilQsString({
              action: 'wbsearchentities',
              format: 'json',
              formatversion: 2,
              search: query,
              type: 'item',
              // the language to search
              language: lang,
              // the language for the label and description in the result
              uselang: lang,
              limit: 10,
              origin: '*'
            });
            d3_json(url).then(function (result) {
              if (result && result.error) {
                throw new Error(result.error);
              }

              if (callback) callback(null, result.search || {});
            })["catch"](function (err) {
              if (callback) callback(err.message, {});
            });
          },
          // Given a Wikipedia language and article title,
          // return an array of corresponding Wikidata entities.
          itemsByTitle: function itemsByTitle(lang, title, callback) {
            if (!title) {
              if (callback) callback('No title', {});
              return;
            }

            lang = lang || 'en';
            var url = apibase + utilQsString({
              action: 'wbgetentities',
              format: 'json',
              formatversion: 2,
              sites: lang.replace(/-/g, '_') + 'wiki',
              titles: title,
              languages: 'en',
              // shrink response by filtering to one language
              origin: '*'
            });
            d3_json(url).then(function (result) {
              if (result && result.error) {
                throw new Error(result.error);
              }

              if (callback) callback(null, result.entities || {});
            })["catch"](function (err) {
              if (callback) callback(err.message, {});
            });
          },
          languagesToQuery: function languagesToQuery() {
            return _mainLocalizer.localeCodes().map(function (code) {
              return code.toLowerCase();
            }).filter(function (code) {
              // HACK: en-us isn't a wikidata language. We should really be filtering by
              // the languages known to be supported by wikidata.
              return code !== 'en-us';
            });
          },
          entityByQID: function entityByQID(qid, callback) {
            if (!qid) {
              callback('No qid', {});
              return;
            }

            if (_wikidataCache[qid]) {
              if (callback) callback(null, _wikidataCache[qid]);
              return;
            }

            var langs = this.languagesToQuery();
            var url = apibase + utilQsString({
              action: 'wbgetentities',
              format: 'json',
              formatversion: 2,
              ids: qid,
              props: 'labels|descriptions|claims|sitelinks',
              sitefilter: langs.map(function (d) {
                return d + 'wiki';
              }).join('|'),
              languages: langs.join('|'),
              languagefallback: 1,
              origin: '*'
            });
            d3_json(url).then(function (result) {
              if (result && result.error) {
                throw new Error(result.error);
              }

              if (callback) callback(null, result.entities[qid] || {});
            })["catch"](function (err) {
              if (callback) callback(err.message, {});
            });
          },
          // Pass `params` object of the form:
          // {
          //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
          // }
          //
          // Get an result object used to display tag documentation
          // {
          //   title:        'string',
          //   description:  'string',
          //   editURL:      'string',
          //   imageURL:     'string',
          //   wiki:         { title: 'string', text: 'string', url: 'string' }
          // }
          //
          getDocs: function getDocs(params, callback) {
            var langs = this.languagesToQuery();
            this.entityByQID(params.qid, function (err, entity) {
              if (err || !entity) {
                callback(err || 'No entity');
                return;
              }

              var i;
              var description;

              for (i in langs) {
                var code = langs[i];

                if (entity.descriptions[code] && entity.descriptions[code].language === code) {
                  description = entity.descriptions[code];
                  break;
                }
              }

              if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result

              var result = {
                title: entity.id,
                description: description ? description.value : '',
                descriptionLocaleCode: description ? description.language : '',
                editURL: 'https://www.wikidata.org/wiki/' + entity.id
              }; // add image

              if (entity.claims) {
                var imageroot = 'https://commons.wikimedia.org/w/index.php';
                var props = ['P154', 'P18']; // logo image, image

                var prop, image;

                for (i = 0; i < props.length; i++) {
                  prop = entity.claims[props[i]];

                  if (prop && Object.keys(prop).length > 0) {
                    image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;

                    if (image) {
                      result.imageURL = imageroot + '?' + utilQsString({
                        title: 'Special:Redirect/file/' + image,
                        width: 400
                      });
                      break;
                    }
                  }
                }
              }

              if (entity.sitelinks) {
                var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en'; // must be one of these that we requested..

                for (i = 0; i < langs.length; i++) {
                  // check each, in order of preference
                  var w = langs[i] + 'wiki';

                  if (entity.sitelinks[w]) {
                    var title = entity.sitelinks[w].title;
                    var tKey = 'inspector.wiki_reference';

                    if (!englishLocale && langs[i] === 'en') {
                      // user's locale isn't English but
                      tKey = 'inspector.wiki_en_reference'; // we are sending them to enwiki anyway..
                    }

                    result.wiki = {
                      title: title,
                      text: tKey,
                      url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
                    };
                    break;
                  }
                }
              }

              callback(null, result);
            });
          }
        };

        var endpoint = 'https://en.wikipedia.org/w/api.php?';
        var serviceWikipedia = {
          init: function init() {},
          reset: function reset() {},
          search: function search(lang, query, callback) {
            if (!query) {
              if (callback) callback('No Query', []);
              return;
            }

            lang = lang || 'en';
            var url = endpoint.replace('en', lang) + utilQsString({
              action: 'query',
              list: 'search',
              srlimit: '10',
              srinfo: 'suggestion',
              format: 'json',
              origin: '*',
              srsearch: query
            });
            d3_json(url).then(function (result) {
              if (result && result.error) {
                throw new Error(result.error);
              } else if (!result || !result.query || !result.query.search) {
                throw new Error('No Results');
              }

              if (callback) {
                var titles = result.query.search.map(function (d) {
                  return d.title;
                });
                callback(null, titles);
              }
            })["catch"](function (err) {
              if (callback) callback(err, []);
            });
          },
          suggestions: function suggestions(lang, query, callback) {
            if (!query) {
              if (callback) callback('', []);
              return;
            }

            lang = lang || 'en';
            var url = endpoint.replace('en', lang) + utilQsString({
              action: 'opensearch',
              namespace: 0,
              suggest: '',
              format: 'json',
              origin: '*',
              search: query
            });
            d3_json(url).then(function (result) {
              if (result && result.error) {
                throw new Error(result.error);
              } else if (!result || result.length < 2) {
                throw new Error('No Results');
              }

              if (callback) callback(null, result[1] || []);
            })["catch"](function (err) {
              if (callback) callback(err.message, []);
            });
          },
          translations: function translations(lang, title, callback) {
            if (!title) {
              if (callback) callback('No Title');
              return;
            }

            var url = endpoint.replace('en', lang) + utilQsString({
              action: 'query',
              prop: 'langlinks',
              format: 'json',
              origin: '*',
              lllimit: 500,
              titles: title
            });
            d3_json(url).then(function (result) {
              if (result && result.error) {
                throw new Error(result.error);
              } else if (!result || !result.query || !result.query.pages) {
                throw new Error('No Results');
              }

              if (callback) {
                var list = result.query.pages[Object.keys(result.query.pages)[0]];
                var translations = {};

                if (list && list.langlinks) {
                  list.langlinks.forEach(function (d) {
                    translations[d.lang] = d['*'];
                  });
                }

                callback(null, translations);
              }
            })["catch"](function (err) {
              if (callback) callback(err.message);
            });
          }
        };

        var services = {
          geocoder: serviceNominatim,
          keepRight: serviceKeepRight,
          improveOSM: serviceImproveOSM,
          osmose: serviceOsmose,
          mapillary: serviceMapillary,
          nsi: serviceNsi,
          openstreetcam: serviceOpenstreetcam,
          osm: serviceOsm,
          osmWikibase: serviceOsmWikibase,
          maprules: serviceMapRules,
          streetside: serviceStreetside,
          taginfo: serviceTaginfo,
          vectorTile: serviceVectorTile,
          wikidata: serviceWikidata,
          wikipedia: serviceWikipedia
        };

        function modeDragNote(context) {
          var mode = {
            id: 'drag-note',
            button: 'browse'
          };
          var edit = behaviorEdit(context);

          var _nudgeInterval;

          var _lastLoc;

          var _note; // most current note.. dragged note may have stale datum.


          function startNudge(d3_event, nudge) {
            if (_nudgeInterval) window.clearInterval(_nudgeInterval);
            _nudgeInterval = window.setInterval(function () {
              context.map().pan(nudge);
              doMove(d3_event, nudge);
            }, 50);
          }

          function stopNudge() {
            if (_nudgeInterval) {
              window.clearInterval(_nudgeInterval);
              _nudgeInterval = null;
            }
          }

          function origin(note) {
            return context.projection(note.loc);
          }

          function start(d3_event, note) {
            _note = note;
            var osm = services.osm;

            if (osm) {
              // Get latest note from cache.. The marker may have a stale datum bound to it
              // and dragging it around can sometimes delete the users note comment.
              _note = osm.getNote(_note.id);
            }

            context.surface().selectAll('.note-' + _note.id).classed('active', true);
            context.perform(actionNoop());
            context.enter(mode);
            context.selectedNoteID(_note.id);
          }

          function move(d3_event, entity, point) {
            d3_event.stopPropagation();
            _lastLoc = context.projection.invert(point);
            doMove(d3_event);
            var nudge = geoViewportEdge(point, context.map().dimensions());

            if (nudge) {
              startNudge(d3_event, nudge);
            } else {
              stopNudge();
            }
          }

          function doMove(d3_event, nudge) {
            nudge = nudge || [0, 0];
            var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
            var currMouse = geoVecSubtract(currPoint, nudge);
            var loc = context.projection.invert(currMouse);
            _note = _note.move(loc);
            var osm = services.osm;

            if (osm) {
              osm.replaceNote(_note); // update note cache
            }

            context.replace(actionNoop()); // trigger redraw
          }

          function end() {
            context.replace(actionNoop()); // trigger redraw

            context.selectedNoteID(_note.id).enter(modeSelectNote(context, _note.id));
          }

          var drag = behaviorDrag().selector('.layer-touch.markers .target.note.new').surface(context.container().select('.main-map').node()).origin(origin).on('start', start).on('move', move).on('end', end);

          mode.enter = function () {
            context.install(edit);
          };

          mode.exit = function () {
            context.ui().sidebar.hover.cancel();
            context.uninstall(edit);
            context.surface().selectAll('.active').classed('active', false);
            stopNudge();
          };

          mode.behavior = drag;
          return mode;
        }

        function modeSelectData(context, selectedDatum) {
          var mode = {
            id: 'select-data',
            button: 'browse'
          };
          var keybinding = utilKeybinding('select-data');
          var dataEditor = uiDataEditor(context);
          var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior]; // class the data as selected, or return to browse mode if the data is gone

          function selectData(d3_event, drawn) {
            var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);

            if (selection.empty()) {
              // Return to browse mode if selected DOM elements have
              // disappeared because the user moved them out of view..
              var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;

              if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
                context.enter(modeBrowse(context));
              }
            } else {
              selection.classed('selected', true);
            }
          }

          function esc() {
            if (context.container().select('.combobox').size()) return;
            context.enter(modeBrowse(context));
          }

          mode.zoomToSelected = function () {
            var extent = geoExtent(d3_geoBounds(selectedDatum));
            context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
          };

          mode.enter = function () {
            behaviors.forEach(context.install);
            keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
            select(document).call(keybinding);
            selectData();
            var sidebar = context.ui().sidebar;
            sidebar.show(dataEditor.datum(selectedDatum)); // expand the sidebar, avoid obscuring the data if needed

            var extent = geoExtent(d3_geoBounds(selectedDatum));
            sidebar.expand(sidebar.intersects(extent));
            context.map().on('drawn.select-data', selectData);
          };

          mode.exit = function () {
            behaviors.forEach(context.uninstall);
            select(document).call(keybinding.unbind);
            context.surface().selectAll('.layer-mapdata .selected').classed('selected hover', false);
            context.map().on('drawn.select-data', null);
            context.ui().sidebar.hide();
          };

          return mode;
        }

        function behaviorSelect(context) {
          var _tolerancePx = 4; // see also behaviorDrag

          var _lastMouseEvent = null;
          var _showMenu = false;
          var _downPointers = {};
          var _longPressTimeout = null;
          var _lastInteractionType = null; // the id of the down pointer that's enabling multiselection while down

          var _multiselectionPointerId = null; // use pointer events on supported platforms; fallback to mouse events

          var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

          function keydown(d3_event) {
            if (d3_event.keyCode === 32) {
              // don't react to spacebar events during text input
              var activeNode = document.activeElement;
              if (activeNode && new Set(['INPUT', 'TEXTAREA']).has(activeNode.nodeName)) return;
            }

            if (d3_event.keyCode === 93 || // context menu key
            d3_event.keyCode === 32) {
              // spacebar
              d3_event.preventDefault();
            }

            if (d3_event.repeat) return; // ignore repeated events for held keys
            // if any key is pressed the user is probably doing something other than long-pressing

            cancelLongPress();

            if (d3_event.shiftKey) {
              context.surface().classed('behavior-multiselect', true);
            }

            if (d3_event.keyCode === 32) {
              // spacebar
              if (!_downPointers.spacebar && _lastMouseEvent) {
                cancelLongPress();
                _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
                _downPointers.spacebar = {
                  firstEvent: _lastMouseEvent,
                  lastEvent: _lastMouseEvent
                };
              }
            }
          }

          function keyup(d3_event) {
            cancelLongPress();

            if (!d3_event.shiftKey) {
              context.surface().classed('behavior-multiselect', false);
            }

            if (d3_event.keyCode === 93) {
              // context menu key
              d3_event.preventDefault();
              _lastInteractionType = 'menukey';
              contextmenu(d3_event);
            } else if (d3_event.keyCode === 32) {
              // spacebar
              var pointer = _downPointers.spacebar;

              if (pointer) {
                delete _downPointers.spacebar;
                if (pointer.done) return;
                d3_event.preventDefault();
                _lastInteractionType = 'spacebar';
                click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
              }
            }
          }

          function pointerdown(d3_event) {
            var id = (d3_event.pointerId || 'mouse').toString();
            cancelLongPress();
            if (d3_event.buttons && d3_event.buttons !== 1) return;
            context.ui().closeEditMenu();
            _longPressTimeout = window.setTimeout(didLongPress, 500, id, 'longdown-' + (d3_event.pointerType || 'mouse'));
            _downPointers[id] = {
              firstEvent: d3_event,
              lastEvent: d3_event
            };
          }

          function didLongPress(id, interactionType) {
            var pointer = _downPointers[id];
            if (!pointer) return;

            for (var i in _downPointers) {
              // don't allow this or any currently down pointer to trigger another click
              _downPointers[i].done = true;
            } // treat long presses like right-clicks


            _longPressTimeout = null;
            _lastInteractionType = interactionType;
            _showMenu = true;
            click(pointer.firstEvent, pointer.lastEvent, id);
          }

          function pointermove(d3_event) {
            var id = (d3_event.pointerId || 'mouse').toString();

            if (_downPointers[id]) {
              _downPointers[id].lastEvent = d3_event;
            }

            if (!d3_event.pointerType || d3_event.pointerType === 'mouse') {
              _lastMouseEvent = d3_event;

              if (_downPointers.spacebar) {
                _downPointers.spacebar.lastEvent = d3_event;
              }
            }
          }

          function pointerup(d3_event) {
            var id = (d3_event.pointerId || 'mouse').toString();
            var pointer = _downPointers[id];
            if (!pointer) return;
            delete _downPointers[id];

            if (_multiselectionPointerId === id) {
              _multiselectionPointerId = null;
            }

            if (pointer.done) return;
            click(pointer.firstEvent, d3_event, id);
          }

          function pointercancel(d3_event) {
            var id = (d3_event.pointerId || 'mouse').toString();
            if (!_downPointers[id]) return;
            delete _downPointers[id];

            if (_multiselectionPointerId === id) {
              _multiselectionPointerId = null;
            }
          }

          function contextmenu(d3_event) {
            d3_event.preventDefault();

            if (!+d3_event.clientX && !+d3_event.clientY) {
              if (_lastMouseEvent) {
                d3_event.sourceEvent = _lastMouseEvent;
              } else {
                return;
              }
            } else {
              _lastMouseEvent = d3_event;
              _lastInteractionType = 'rightclick';
            }

            _showMenu = true;
            click(d3_event, d3_event);
          }

          function click(firstEvent, lastEvent, pointerId) {
            cancelLongPress();
            var mapNode = context.container().select('.main-map').node(); // Use the `main-map` coordinate system since the surface and supersurface
            // are transformed when drag-panning.

            var pointGetter = utilFastMouse(mapNode);
            var p1 = pointGetter(firstEvent);
            var p2 = pointGetter(lastEvent);
            var dist = geoVecLength(p1, p2);

            if (dist > _tolerancePx || !mapContains(lastEvent)) {
              resetProperties();
              return;
            }

            var targetDatum = lastEvent.target.__data__;
            var multiselectEntityId;

            if (!_multiselectionPointerId) {
              // If a different pointer than the one triggering this click is down on a
              // feature, treat this and all future clicks as multiselection until that
              // pointer is raised.
              var selectPointerInfo = pointerDownOnSelection(pointerId);

              if (selectPointerInfo) {
                _multiselectionPointerId = selectPointerInfo.pointerId; // if the other feature isn't selected yet, make sure we select it

                multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
                _downPointers[selectPointerInfo.pointerId].done = true;
              }
            } // support multiselect if data is already selected


            var isMultiselect = context.mode().id === 'select' && ( // and shift key is down
            lastEvent && lastEvent.shiftKey || // or we're lasso-selecting
            context.surface().select('.lasso').node() || // or a pointer is down over a selected feature
            _multiselectionPointerId && !multiselectEntityId);

            processClick(targetDatum, isMultiselect, p2, multiselectEntityId);

            function mapContains(event) {
              var rect = mapNode.getBoundingClientRect();
              return event.clientX >= rect.left && event.clientX <= rect.right && event.clientY >= rect.top && event.clientY <= rect.bottom;
            }

            function pointerDownOnSelection(skipPointerId) {
              var mode = context.mode();
              var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];

              for (var pointerId in _downPointers) {
                if (pointerId === 'spacebar' || pointerId === skipPointerId) continue;
                var pointerInfo = _downPointers[pointerId];
                var p1 = pointGetter(pointerInfo.firstEvent);
                var p2 = pointGetter(pointerInfo.lastEvent);
                if (geoVecLength(p1, p2) > _tolerancePx) continue;
                var datum = pointerInfo.firstEvent.target.__data__;
                var entity = datum && datum.properties && datum.properties.entity || datum;

                if (context.graph().hasEntity(entity.id)) {
                  return {
                    pointerId: pointerId,
                    entityId: entity.id,
                    selected: selectedIDs.indexOf(entity.id) !== -1
                  };
                }
              }

              return null;
            }
          }

          function processClick(datum, isMultiselect, point, alsoSelectId) {
            var mode = context.mode();
            var showMenu = _showMenu;
            var interactionType = _lastInteractionType;
            var entity = datum && datum.properties && datum.properties.entity;
            if (entity) datum = entity;

            if (datum && datum.type === 'midpoint') {
              // treat targeting midpoints as if targeting the parent way
              datum = datum.parents[0];
            }

            var newMode;

            if (datum instanceof osmEntity) {
              // targeting an entity
              var selectedIDs = context.selectedIDs();
              context.selectedNoteID(null);
              context.selectedErrorID(null);

              if (!isMultiselect) {
                // don't change the selection if we're toggling the menu atop a multiselection
                if (!showMenu || selectedIDs.length <= 1 || selectedIDs.indexOf(datum.id) === -1) {
                  if (alsoSelectId === datum.id) alsoSelectId = null;
                  selectedIDs = (alsoSelectId ? [alsoSelectId] : []).concat([datum.id]); // always enter modeSelect even if the entity is already
                  // selected since listeners may expect `context.enter` events,
                  // e.g. in the walkthrough

                  newMode = mode.id === 'select' ? mode.selectedIDs(selectedIDs) : modeSelect(context, selectedIDs).selectBehavior(behavior);
                  context.enter(newMode);
                }
              } else {
                if (selectedIDs.indexOf(datum.id) !== -1) {
                  // clicked entity is already in the selectedIDs list..
                  if (!showMenu) {
                    // deselect clicked entity, then reenter select mode or return to browse mode..
                    selectedIDs = selectedIDs.filter(function (id) {
                      return id !== datum.id;
                    });
                    newMode = selectedIDs.length ? mode.selectedIDs(selectedIDs) : modeBrowse(context).selectBehavior(behavior);
                    context.enter(newMode);
                  }
                } else {
                  // clicked entity is not in the selected list, add it..
                  selectedIDs = selectedIDs.concat([datum.id]);
                  newMode = mode.selectedIDs(selectedIDs);
                  context.enter(newMode);
                }
              }
            } else if (datum && datum.__featurehash__ && !isMultiselect) {
              // targeting custom data
              context.selectedNoteID(null).enter(modeSelectData(context, datum));
            } else if (datum instanceof osmNote && !isMultiselect) {
              // targeting a note
              context.selectedNoteID(datum.id).enter(modeSelectNote(context, datum.id));
            } else if (datum instanceof QAItem & !isMultiselect) {
              // targeting an external QA issue
              context.selectedErrorID(datum.id).enter(modeSelectError(context, datum.id, datum.service));
            } else {
              // targeting nothing
              context.selectedNoteID(null);
              context.selectedErrorID(null);

              if (!isMultiselect && mode.id !== 'browse') {
                context.enter(modeBrowse(context));
              }
            }

            context.ui().closeEditMenu(); // always request to show the edit menu in case the mode needs it

            if (showMenu) context.ui().showEditMenu(point, interactionType);
            resetProperties();
          }

          function cancelLongPress() {
            if (_longPressTimeout) window.clearTimeout(_longPressTimeout);
            _longPressTimeout = null;
          }

          function resetProperties() {
            cancelLongPress();
            _showMenu = false;
            _lastInteractionType = null; // don't reset _lastMouseEvent since it might still be useful
          }

          function behavior(selection) {
            resetProperties();
            _lastMouseEvent = context.map().lastPointerEvent();
            select(window).on('keydown.select', keydown).on('keyup.select', keyup).on(_pointerPrefix + 'move.select', pointermove, true).on(_pointerPrefix + 'up.select', pointerup, true).on('pointercancel.select', pointercancel, true).on('contextmenu.select-window', function (d3_event) {
              // Edge and IE really like to show the contextmenu on the
              // menubar when user presses a keyboard menu button
              // even after we've already preventdefaulted the key event.
              var e = d3_event;

              if (+e.clientX === 0 && +e.clientY === 0) {
                d3_event.preventDefault();
              }
            });
            selection.on(_pointerPrefix + 'down.select', pointerdown).on('contextmenu.select', contextmenu);
            /*if (d3_event && d3_event.shiftKey) {
                context.surface()
                    .classed('behavior-multiselect', true);
            }*/
          }

          behavior.off = function (selection) {
            cancelLongPress();
            select(window).on('keydown.select', null).on('keyup.select', null).on('contextmenu.select-window', null).on(_pointerPrefix + 'move.select', null, true).on(_pointerPrefix + 'up.select', null, true).on('pointercancel.select', null, true);
            selection.on(_pointerPrefix + 'down.select', null).on('contextmenu.select', null);
            context.surface().classed('behavior-multiselect', false);
          };

          return behavior;
        }

        function operationContinue(context, selectedIDs) {
          var _entities = selectedIDs.map(function (id) {
            return context.graph().entity(id);
          });

          var _geometries = Object.assign({
            line: [],
            vertex: []
          }, utilArrayGroupBy(_entities, function (entity) {
            return entity.geometry(context.graph());
          }));

          var _vertex = _geometries.vertex.length && _geometries.vertex[0];

          function candidateWays() {
            return _vertex ? context.graph().parentWays(_vertex).filter(function (parent) {
              return parent.geometry(context.graph()) === 'line' && !parent.isClosed() && parent.affix(_vertex.id) && (_geometries.line.length === 0 || _geometries.line[0] === parent);
            }) : [];
          }

          var _candidates = candidateWays();

          var operation = function operation() {
            var candidate = _candidates[0];
            context.enter(modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(_vertex.id), true));
          };

          operation.relatedEntityIds = function () {
            return _candidates.length ? [_candidates[0].id] : [];
          };

          operation.available = function () {
            return _geometries.vertex.length === 1 && _geometries.line.length <= 1 && !context.features().hasHiddenConnections(_vertex, context.graph());
          };

          operation.disabled = function () {
            if (_candidates.length === 0) {
              return 'not_eligible';
            } else if (_candidates.length > 1) {
              return 'multiple';
            }

            return false;
          };

          operation.tooltip = function () {
            var disable = operation.disabled();
            return disable ? _t('operations.continue.' + disable) : _t('operations.continue.description');
          };

          operation.annotation = function () {
            return _t('operations.continue.annotation.line');
          };

          operation.id = 'continue';
          operation.keys = [_t('operations.continue.key')];
          operation.title = _t('operations.continue.title');
          operation.behavior = behaviorOperation(context).which(operation);
          return operation;
        }

        function operationCopy(context, selectedIDs) {
          function getFilteredIdsToCopy() {
            return selectedIDs.filter(function (selectedID) {
              var entity = context.graph().hasEntity(selectedID); // don't copy untagged vertices separately from ways

              return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
            });
          }

          var operation = function operation() {
            var graph = context.graph();
            var selected = groupEntities(getFilteredIdsToCopy(), graph);
            var canCopy = [];
            var skip = {};
            var entity;
            var i;

            for (i = 0; i < selected.relation.length; i++) {
              entity = selected.relation[i];

              if (!skip[entity.id] && entity.isComplete(graph)) {
                canCopy.push(entity.id);
                skip = getDescendants(entity.id, graph, skip);
              }
            }

            for (i = 0; i < selected.way.length; i++) {
              entity = selected.way[i];

              if (!skip[entity.id]) {
                canCopy.push(entity.id);
                skip = getDescendants(entity.id, graph, skip);
              }
            }

            for (i = 0; i < selected.node.length; i++) {
              entity = selected.node[i];

              if (!skip[entity.id]) {
                canCopy.push(entity.id);
              }
            }

            context.copyIDs(canCopy);

            if (_point && (canCopy.length !== 1 || graph.entity(canCopy[0]).type !== 'node')) {
              // store the anchor coordinates if copying more than a single node
              context.copyLonLat(context.projection.invert(_point));
            } else {
              context.copyLonLat(null);
            }
          };

          function groupEntities(ids, graph) {
            var entities = ids.map(function (id) {
              return graph.entity(id);
            });
            return Object.assign({
              relation: [],
              way: [],
              node: []
            }, utilArrayGroupBy(entities, 'type'));
          }

          function getDescendants(id, graph, descendants) {
            var entity = graph.entity(id);
            var children;
            descendants = descendants || {};

            if (entity.type === 'relation') {
              children = entity.members.map(function (m) {
                return m.id;
              });
            } else if (entity.type === 'way') {
              children = entity.nodes;
            } else {
              children = [];
            }

            for (var i = 0; i < children.length; i++) {
              if (!descendants[children[i]]) {
                descendants[children[i]] = true;
                descendants = getDescendants(children[i], graph, descendants);
              }
            }

            return descendants;
          }

          operation.available = function () {
            return getFilteredIdsToCopy().length > 0;
          };

          operation.disabled = function () {
            var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());

            if (extent.percentContainedIn(context.map().extent()) < 0.8) {
              return 'too_large';
            }

            return false;
          };

          operation.availableForKeypress = function () {
            var selection = window.getSelection && window.getSelection(); // if the user has text selected then let them copy that, not the selected feature

            return !selection || !selection.toString();
          };

          operation.tooltip = function () {
            var disable = operation.disabled();
            return disable ? _t('operations.copy.' + disable, {
              n: selectedIDs.length
            }) : _t('operations.copy.description', {
              n: selectedIDs.length
            });
          };

          operation.annotation = function () {
            return _t('operations.copy.annotation', {
              n: selectedIDs.length
            });
          };

          var _point;

          operation.point = function (val) {
            _point = val;
            return operation;
          };

          operation.id = 'copy';
          operation.keys = [uiCmd('⌘C')];
          operation.title = _t('operations.copy.title');
          operation.behavior = behaviorOperation(context).which(operation);
          return operation;
        }

        function operationDisconnect(context, selectedIDs) {
          var _vertexIDs = [];
          var _wayIDs = [];
          var _otherIDs = [];
          var _actions = [];
          selectedIDs.forEach(function (id) {
            var entity = context.entity(id);

            if (entity.type === 'way') {
              _wayIDs.push(id);
            } else if (entity.geometry(context.graph()) === 'vertex') {
              _vertexIDs.push(id);
            } else {
              _otherIDs.push(id);
            }
          });

          var _coords,
              _descriptionID = '',
              _annotationID = 'features';

          var _disconnectingVertexIds = [];
          var _disconnectingWayIds = [];

          if (_vertexIDs.length > 0) {
            // At the selected vertices, disconnect the selected ways, if any, else
            // disconnect all connected ways
            _disconnectingVertexIds = _vertexIDs;

            _vertexIDs.forEach(function (vertexID) {
              var action = actionDisconnect(vertexID);

              if (_wayIDs.length > 0) {
                var waysIDsForVertex = _wayIDs.filter(function (wayID) {
                  var way = context.entity(wayID);
                  return way.nodes.indexOf(vertexID) !== -1;
                });

                action.limitWays(waysIDsForVertex);
              }

              _actions.push(action);

              _disconnectingWayIds = _disconnectingWayIds.concat(context.graph().parentWays(context.graph().entity(vertexID)).map(function (d) {
                return d.id;
              }));
            });

            _disconnectingWayIds = utilArrayUniq(_disconnectingWayIds).filter(function (id) {
              return _wayIDs.indexOf(id) === -1;
            });
            _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';

            if (_wayIDs.length === 1) {
              _descriptionID += 'single_way.' + context.graph().geometry(_wayIDs[0]);
            } else {
              _descriptionID += _wayIDs.length === 0 ? 'no_ways' : 'multiple_ways';
            }
          } else if (_wayIDs.length > 0) {
            // Disconnect the selected ways from each other, if they're connected,
            // else disconnect them from all connected ways
            var ways = _wayIDs.map(function (id) {
              return context.entity(id);
            });

            var nodes = utilGetAllNodes(_wayIDs, context.graph());
            _coords = nodes.map(function (n) {
              return n.loc;
            }); // actions for connected nodes shared by at least two selected ways

            var sharedActions = [];
            var sharedNodes = []; // actions for connected nodes

            var unsharedActions = [];
            var unsharedNodes = [];
            nodes.forEach(function (node) {
              var action = actionDisconnect(node.id).limitWays(_wayIDs);

              if (action.disabled(context.graph()) !== 'not_connected') {
                var count = 0;

                for (var i in ways) {
                  var way = ways[i];

                  if (way.nodes.indexOf(node.id) !== -1) {
                    count += 1;
                  }

                  if (count > 1) break;
                }

                if (count > 1) {
                  sharedActions.push(action);
                  sharedNodes.push(node);
                } else {
                  unsharedActions.push(action);
                  unsharedNodes.push(node);
                }
              }
            });
            _descriptionID += 'no_points.';
            _descriptionID += _wayIDs.length === 1 ? 'single_way.' : 'multiple_ways.';

            if (sharedActions.length) {
              // if any nodes are shared, only disconnect the selected ways from each other
              _actions = sharedActions;
              _disconnectingVertexIds = sharedNodes.map(function (node) {
                return node.id;
              });
              _descriptionID += 'conjoined';
              _annotationID = 'from_each_other';
            } else {
              // if no nodes are shared, disconnect the selected ways from all connected ways
              _actions = unsharedActions;
              _disconnectingVertexIds = unsharedNodes.map(function (node) {
                return node.id;
              });

              if (_wayIDs.length === 1) {
                _descriptionID += context.graph().geometry(_wayIDs[0]);
              } else {
                _descriptionID += 'separate';
              }
            }
          }

          var _extent = utilTotalExtent(_disconnectingVertexIds, context.graph());

          var operation = function operation() {
            context.perform(function (graph) {
              return _actions.reduce(function (graph, action) {
                return action(graph);
              }, graph);
            }, operation.annotation());
            context.validator().validate();
          };

          operation.relatedEntityIds = function () {
            if (_vertexIDs.length) {
              return _disconnectingWayIds;
            }

            return _disconnectingVertexIds;
          };

          operation.available = function () {
            if (_actions.length === 0) return false;
            if (_otherIDs.length !== 0) return false;
            if (_vertexIDs.length !== 0 && _wayIDs.length !== 0 && !_wayIDs.every(function (wayID) {
              return _vertexIDs.some(function (vertexID) {
                var way = context.entity(wayID);
                return way.nodes.indexOf(vertexID) !== -1;
              });
            })) return false;
            return true;
          };

          operation.disabled = function () {
            var reason;

            for (var actionIndex in _actions) {
              reason = _actions[actionIndex].disabled(context.graph());
              if (reason) return reason;
            }

            if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
              return 'too_large.' + ((_vertexIDs.length ? _vertexIDs : _wayIDs).length === 1 ? 'single' : 'multiple');
            } else if (_coords && someMissing()) {
              return 'not_downloaded';
            } else if (selectedIDs.some(context.hasHiddenConnections)) {
              return 'connected_to_hidden';
            }

            return false;

            function someMissing() {
              if (context.inIntro()) return false;
              var osm = context.connection();

              if (osm) {
                var missing = _coords.filter(function (loc) {
                  return !osm.isDataLoaded(loc);
                });

                if (missing.length) {
                  missing.forEach(function (loc) {
                    context.loadTileAtLoc(loc);
                  });
                  return true;
                }
              }

              return false;
            }
          };

          operation.tooltip = function () {
            var disable = operation.disabled();

            if (disable) {
              return _t('operations.disconnect.' + disable);
            }

            return _t('operations.disconnect.description.' + _descriptionID);
          };

          operation.annotation = function () {
            return _t('operations.disconnect.annotation.' + _annotationID);
          };

          operation.id = 'disconnect';
          operation.keys = [_t('operations.disconnect.key')];
          operation.title = _t('operations.disconnect.title');
          operation.behavior = behaviorOperation(context).which(operation);
          return operation;
        }

        function operationDowngrade(context, selectedIDs) {
          var _affectedFeatureCount = 0;

          var _downgradeType = downgradeTypeForEntityIDs(selectedIDs);

          var _multi = _affectedFeatureCount === 1 ? 'single' : 'multiple';

          function downgradeTypeForEntityIDs(entityIds) {
            var downgradeType;
            _affectedFeatureCount = 0;

            for (var i in entityIds) {
              var entityID = entityIds[i];
              var type = downgradeTypeForEntityID(entityID);

              if (type) {
                _affectedFeatureCount += 1;

                if (downgradeType && type !== downgradeType) {
                  if (downgradeType !== 'generic' && type !== 'generic') {
                    downgradeType = 'building_address';
                  } else {
                    downgradeType = 'generic';
                  }
                } else {
                  downgradeType = type;
                }
              }
            }

            return downgradeType;
          }

          function downgradeTypeForEntityID(entityID) {
            var graph = context.graph();
            var entity = graph.entity(entityID);
            var preset = _mainPresetIndex.match(entity, graph);
            if (!preset || preset.isFallback()) return null;

            if (entity.type === 'node' && preset.id !== 'address' && Object.keys(entity.tags).some(function (key) {
              return key.match(/^addr:.{1,}/);
            })) {
              return 'address';
            }

            var geometry = entity.geometry(graph);

            if (geometry === 'area' && entity.tags.building && !preset.tags.building) {
              return 'building';
            }

            if (geometry === 'vertex' && Object.keys(entity.tags).length) {
              return 'generic';
            }

            return null;
          }

          var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
          var addressKeysToKeep = ['source'];

          var operation = function operation() {
            context.perform(function (graph) {
              for (var i in selectedIDs) {
                var entityID = selectedIDs[i];
                var type = downgradeTypeForEntityID(entityID);
                if (!type) continue;
                var tags = Object.assign({}, graph.entity(entityID).tags); // shallow copy

                for (var key in tags) {
                  if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) continue;

                  if (type === 'building') {
                    if (buildingKeysToKeep.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
                  }

                  if (type !== 'generic') {
                    if (key.match(/^addr:.{1,}/) || key.match(/^source:.{1,}/)) continue;
                  }

                  delete tags[key];
                }

                graph = actionChangeTags(entityID, tags)(graph);
              }

              return graph;
            }, operation.annotation());
            context.validator().validate(); // refresh the select mode to enable the delete operation

            context.enter(modeSelect(context, selectedIDs));
          };

          operation.available = function () {
            return _downgradeType;
          };

          operation.disabled = function () {
            if (selectedIDs.some(hasWikidataTag)) {
              return 'has_wikidata_tag';
            }

            return false;

            function hasWikidataTag(id) {
              var entity = context.entity(id);
              return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
            }
          };

          operation.tooltip = function () {
            var disable = operation.disabled();
            return disable ? _t('operations.downgrade.' + disable + '.' + _multi) : _t('operations.downgrade.description.' + _downgradeType);
          };

          operation.annotation = function () {
            var suffix;

            if (_downgradeType === 'building_address') {
              suffix = 'generic';
            } else {
              suffix = _downgradeType;
            }

            return _t('operations.downgrade.annotation.' + suffix, {
              n: _affectedFeatureCount
            });
          };

          operation.id = 'downgrade';
          operation.keys = [uiCmd('⌫')];
          operation.title = _t('operations.downgrade.title');
          operation.behavior = behaviorOperation(context).which(operation);
          return operation;
        }

        function operationExtract(context, selectedIDs) {
          var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';

          var _geometries = utilArrayUniq(selectedIDs.map(function (entityID) {
            return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
          }).filter(Boolean));

          var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';

          var _extent;

          var _actions = selectedIDs.map(function (entityID) {
            var graph = context.graph();
            var entity = graph.hasEntity(entityID);
            if (!entity || !entity.hasInterestingTags()) return null;
            if (entity.type === 'node' && graph.parentWays(entity).length === 0) return null;

            if (entity.type !== 'node') {
              var preset = _mainPresetIndex.match(entity, graph); // only allow extraction from ways/relations if the preset supports points

              if (preset.geometry.indexOf('point') === -1) return null;
            }

            _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
            return actionExtract(entityID, context.projection);
          }).filter(Boolean);

          var operation = function operation() {
            var combinedAction = function combinedAction(graph) {
              _actions.forEach(function (action) {
                graph = action(graph);
              });

              return graph;
            };

            context.perform(combinedAction, operation.annotation()); // do the extract

            var extractedNodeIDs = _actions.map(function (action) {
              return action.getExtractedNodeID();
            });

            context.enter(modeSelect(context, extractedNodeIDs));
          };

          operation.available = function () {
            return _actions.length && selectedIDs.length === _actions.length;
          };

          operation.disabled = function () {
            if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
              return 'too_large';
            } else if (selectedIDs.some(function (entityID) {
              return context.graph().geometry(entityID) === 'vertex' && context.hasHiddenConnections(entityID);
            })) {
              return 'connected_to_hidden';
            }

            return false;
          };

          operation.tooltip = function () {
            var disableReason = operation.disabled();

            if (disableReason) {
              return _t('operations.extract.' + disableReason + '.' + _amount);
            } else {
              return _t('operations.extract.description.' + _geometryID + '.' + _amount);
            }
          };

          operation.annotation = function () {
            return _t('operations.extract.annotation', {
              n: selectedIDs.length
            });
          };

          operation.id = 'extract';
          operation.keys = [_t('operations.extract.key')];
          operation.title = _t('operations.extract.title');
          operation.behavior = behaviorOperation(context).which(operation);
          return operation;
        }

        function operationMerge(context, selectedIDs) {
          var _action = getAction();

          function getAction() {
            // prefer a non-disabled action first
            var join = actionJoin(selectedIDs);
            if (!join.disabled(context.graph())) return join;
            var merge = actionMerge(selectedIDs);
            if (!merge.disabled(context.graph())) return merge;
            var mergePolygon = actionMergePolygon(selectedIDs);
            if (!mergePolygon.disabled(context.graph())) return mergePolygon;
            var mergeNodes = actionMergeNodes(selectedIDs);
            if (!mergeNodes.disabled(context.graph())) return mergeNodes; // otherwise prefer an action with an interesting disabled reason

            if (join.disabled(context.graph()) !== 'not_eligible') return join;
            if (merge.disabled(context.graph()) !== 'not_eligible') return merge;
            if (mergePolygon.disabled(context.graph()) !== 'not_eligible') return mergePolygon;
            return mergeNodes;
          }

          var operation = function operation() {
            if (operation.disabled()) return;
            context.perform(_action, operation.annotation());
            context.validator().validate();
            var resultIDs = selectedIDs.filter(context.hasEntity);

            if (resultIDs.length > 1) {
              var interestingIDs = resultIDs.filter(function (id) {
                return context.entity(id).hasInterestingTags();
              });
              if (interestingIDs.length) resultIDs = interestingIDs;
            }

            context.enter(modeSelect(context, resultIDs));
          };

          operation.available = function () {
            return selectedIDs.length >= 2;
          };

          operation.disabled = function () {
            var actionDisabled = _action.disabled(context.graph());

            if (actionDisabled) return actionDisabled;
            var osm = context.connection();

            if (osm && _action.resultingWayNodesLength && _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
              return 'too_many_vertices';
            }

            return false;
          };

          operation.tooltip = function () {
            var disabled = operation.disabled();

            if (disabled) {
              if (disabled === 'restriction') {
                return _t('operations.merge.restriction', {
                  relation: _mainPresetIndex.item('type/restriction').name()
                });
              }

              return _t('operations.merge.' + disabled);
            }

            return _t('operations.merge.description');
          };

          operation.annotation = function () {
            return _t('operations.merge.annotation', {
              n: selectedIDs.length
            });
          };

          operation.id = 'merge';
          operation.keys = [_t('operations.merge.key')];
          operation.title = _t('operations.merge.title');
          operation.behavior = behaviorOperation(context).which(operation);
          return operation;
        }

        function operationPaste(context) {
          var _pastePoint;

          var operation = function operation() {
            if (!_pastePoint) return;
            var oldIDs = context.copyIDs();
            if (!oldIDs.length) return;
            var projection = context.projection;
            var extent = geoExtent();
            var oldGraph = context.copyGraph();
            var newIDs = [];
            var action = actionCopyEntities(oldIDs, oldGraph);
            context.perform(action);
            var copies = action.copies();
            var originals = new Set();
            Object.values(copies).forEach(function (entity) {
              originals.add(entity.id);
            });

            for (var id in copies) {
              var oldEntity = oldGraph.entity(id);
              var newEntity = copies[id];

              extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.


              var parents = context.graph().parentWays(newEntity);
              var parentCopied = parents.some(function (parent) {
                return originals.has(parent.id);
              });

              if (!parentCopied) {
                newIDs.push(newEntity.id);
              }
            } // Use the location of the copy operation to offset the paste location,
            // or else use the center of the pasted extent


            var copyPoint = context.copyLonLat() && projection(context.copyLonLat()) || projection(extent.center());
            var delta = geoVecSubtract(_pastePoint, copyPoint); // Move the pasted objects to be anchored at the paste location

            context.replace(actionMove(newIDs, delta, projection), operation.annotation());
            context.enter(modeSelect(context, newIDs));
          };

          operation.point = function (val) {
            _pastePoint = val;
            return operation;
          };

          operation.available = function () {
            return context.mode().id === 'browse';
          };

          operation.disabled = function () {
            return !context.copyIDs().length;
          };

          operation.tooltip = function () {
            var oldGraph = context.copyGraph();
            var ids = context.copyIDs();

            if (!ids.length) {
              return _t('operations.paste.nothing_copied');
            }

            return _t('operations.paste.description', {
              feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph),
              n: ids.length
            });
          };

          operation.annotation = function () {
            var ids = context.copyIDs();
            return _t('operations.paste.annotation', {
              n: ids.length
            });
          };

          operation.id = 'paste';
          operation.keys = [uiCmd('⌘V')];
          operation.title = _t('operations.paste.title');
          return operation;
        }

        function operationReverse(context, selectedIDs) {
          var operation = function operation() {
            context.perform(function combinedReverseAction(graph) {
              actions().forEach(function (action) {
                graph = action(graph);
              });
              return graph;
            }, operation.annotation());
            context.validator().validate();
          };

          function actions(situation) {
            return selectedIDs.map(function (entityID) {
              var entity = context.hasEntity(entityID);
              if (!entity) return null;

              if (situation === 'toolbar') {
                if (entity.type === 'way' && !entity.isOneWay() && !entity.isSided()) return null;
              }

              var geometry = entity.geometry(context.graph());
              if (entity.type !== 'node' && geometry !== 'line') return null;
              var action = actionReverse(entityID);
              if (action.disabled(context.graph())) return null;
              return action;
            }).filter(Boolean);
          }

          function reverseTypeID() {
            var acts = actions();
            var nodeActionCount = acts.filter(function (act) {
              var entity = context.hasEntity(act.entityID());
              return entity && entity.type === 'node';
            }).length;
            if (nodeActionCount === 0) return 'line';
            if (nodeActionCount === acts.length) return 'point';
            return 'feature';
          }

          operation.available = function (situation) {
            return actions(situation).length > 0;
          };

          operation.disabled = function () {
            return false;
          };

          operation.tooltip = function () {
            return _t('operations.reverse.description.' + reverseTypeID());
          };

          operation.annotation = function () {
            var acts = actions();
            return _t('operations.reverse.annotation.' + reverseTypeID(), {
              n: acts.length
            });
          };

          operation.id = 'reverse';
          operation.keys = [_t('operations.reverse.key')];
          operation.title = _t('operations.reverse.title');
          operation.behavior = behaviorOperation(context).which(operation);
          return operation;
        }

        function operationSplit(context, selectedIDs) {
          var _vertexIds = selectedIDs.filter(function (id) {
            return context.graph().geometry(id) === 'vertex';
          });

          var _selectedWayIds = selectedIDs.filter(function (id) {
            var entity = context.graph().hasEntity(id);
            return entity && entity.type === 'way';
          });

          var _isAvailable = _vertexIds.length > 0 && _vertexIds.length + _selectedWayIds.length === selectedIDs.length;

          var _action = actionSplit(_vertexIds);

          var _ways = [];
          var _geometry = 'feature';
          var _waysAmount = 'single';

          var _nodesAmount = _vertexIds.length === 1 ? 'single' : 'multiple';

          if (_isAvailable) {
            if (_selectedWayIds.length) _action.limitWays(_selectedWayIds);
            _ways = _action.ways(context.graph());
            var geometries = {};

            _ways.forEach(function (way) {
              geometries[way.geometry(context.graph())] = true;
            });

            if (Object.keys(geometries).length === 1) {
              _geometry = Object.keys(geometries)[0];
            }

            _waysAmount = _ways.length === 1 ? 'single' : 'multiple';
          }

          var operation = function operation() {
            var difference = context.perform(_action, operation.annotation()); // select both the nodes and the ways so the mapper can immediately disconnect them if desired

            var idsToSelect = _vertexIds.concat(difference.extantIDs().filter(function (id) {
              // filter out relations that may have had member additions
              return context.entity(id).type === 'way';
            }));

            context.enter(modeSelect(context, idsToSelect));
          };

          operation.relatedEntityIds = function () {
            return _selectedWayIds.length ? [] : _ways.map(function (way) {
              return way.id;
            });
          };

          operation.available = function () {
            return _isAvailable;
          };

          operation.disabled = function () {
            var reason = _action.disabled(context.graph());

            if (reason) {
              return reason;
            } else if (selectedIDs.some(context.hasHiddenConnections)) {
              return 'connected_to_hidden';
            }

            return false;
          };

          operation.tooltip = function () {
            var disable = operation.disabled();
            if (disable) return _t('operations.split.' + disable);
            return _t('operations.split.description.' + _geometry + '.' + _waysAmount + '.' + _nodesAmount + '_node');
          };

          operation.annotation = function () {
            return _t('operations.split.annotation.' + _geometry, {
              n: _ways.length
            });
          };

          operation.id = 'split';
          operation.keys = [_t('operations.split.key')];
          operation.title = _t('operations.split.title');
          operation.behavior = behaviorOperation(context).which(operation);
          return operation;
        }

        function operationStraighten(context, selectedIDs) {
          var _wayIDs = selectedIDs.filter(function (id) {
            return id.charAt(0) === 'w';
          });

          var _nodeIDs = selectedIDs.filter(function (id) {
            return id.charAt(0) === 'n';
          });

          var _amount = (_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple';

          var _nodes = utilGetAllNodes(selectedIDs, context.graph());

          var _coords = _nodes.map(function (n) {
            return n.loc;
          });

          var _extent = utilTotalExtent(selectedIDs, context.graph());

          var _action = chooseAction();

          var _geometry;

          function chooseAction() {
            // straighten selected nodes
            if (_wayIDs.length === 0 && _nodeIDs.length > 2) {
              _geometry = 'point';
              return actionStraightenNodes(_nodeIDs, context.projection); // straighten selected ways (possibly between range of 2 selected nodes)
            } else if (_wayIDs.length > 0 && (_nodeIDs.length === 0 || _nodeIDs.length === 2)) {
              var startNodeIDs = [];
              var endNodeIDs = [];

              for (var i = 0; i < selectedIDs.length; i++) {
                var entity = context.entity(selectedIDs[i]);

                if (entity.type === 'node') {
                  continue;
                } else if (entity.type !== 'way' || entity.isClosed()) {
                  return null; // exit early, can't straighten these
                }

                startNodeIDs.push(entity.first());
                endNodeIDs.push(entity.last());
              } // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)


              startNodeIDs = startNodeIDs.filter(function (n) {
                return startNodeIDs.indexOf(n) === startNodeIDs.lastIndexOf(n);
              });
              endNodeIDs = endNodeIDs.filter(function (n) {
                return endNodeIDs.indexOf(n) === endNodeIDs.lastIndexOf(n);
              }); // Ensure all ways are connected (i.e. only 2 unique endpoints/startpoints)

              if (utilArrayDifference(startNodeIDs, endNodeIDs).length + utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) return null; // Ensure path contains at least 3 unique nodes

              var wayNodeIDs = utilGetAllNodes(_wayIDs, context.graph()).map(function (node) {
                return node.id;
              });
              if (wayNodeIDs.length <= 2) return null; // If range of 2 selected nodes is supplied, ensure nodes lie on the selected path

              if (_nodeIDs.length === 2 && (wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1)) return null;

              if (_nodeIDs.length) {
                // If we're only straightenting between two points, we only need that extent visible
                _extent = utilTotalExtent(_nodeIDs, context.graph());
              }

              _geometry = 'line';
              return actionStraightenWay(selectedIDs, context.projection);
            }

            return null;
          }

          function operation() {
            if (!_action) return;
            context.perform(_action, operation.annotation());
            window.setTimeout(function () {
              context.validator().validate();
            }, 300); // after any transition
          }

          operation.available = function () {
            return Boolean(_action);
          };

          operation.disabled = function () {
            var reason = _action.disabled(context.graph());

            if (reason) {
              return reason;
            } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
              return 'too_large';
            } else if (someMissing()) {
              return 'not_downloaded';
            } else if (selectedIDs.some(context.hasHiddenConnections)) {
              return 'connected_to_hidden';
            }

            return false;

            function someMissing() {
              if (context.inIntro()) return false;
              var osm = context.connection();

              if (osm) {
                var missing = _coords.filter(function (loc) {
                  return !osm.isDataLoaded(loc);
                });

                if (missing.length) {
                  missing.forEach(function (loc) {
                    context.loadTileAtLoc(loc);
                  });
                  return true;
                }
              }

              return false;
            }
          };

          operation.tooltip = function () {
            var disable = operation.disabled();
            return disable ? _t('operations.straighten.' + disable + '.' + _amount) : _t('operations.straighten.description.' + _geometry + (_wayIDs.length === 1 ? '' : 's'));
          };

          operation.annotation = function () {
            return _t('operations.straighten.annotation.' + _geometry, {
              n: _wayIDs.length ? _wayIDs.length : _nodeIDs.length
            });
          };

          operation.id = 'straighten';
          operation.keys = [_t('operations.straighten.key')];
          operation.title = _t('operations.straighten.title');
          operation.behavior = behaviorOperation(context).which(operation);
          return operation;
        }

        var Operations = /*#__PURE__*/Object.freeze({
                __proto__: null,
                operationCircularize: operationCircularize,
                operationContinue: operationContinue,
                operationCopy: operationCopy,
                operationDelete: operationDelete,
                operationDisconnect: operationDisconnect,
                operationDowngrade: operationDowngrade,
                operationExtract: operationExtract,
                operationMerge: operationMerge,
                operationMove: operationMove,
                operationOrthogonalize: operationOrthogonalize,
                operationPaste: operationPaste,
                operationReflectShort: operationReflectShort,
                operationReflectLong: operationReflectLong,
                operationReverse: operationReverse,
                operationRotate: operationRotate,
                operationSplit: operationSplit,
                operationStraighten: operationStraighten
        });

        function modeSelect(context, selectedIDs) {
          var mode = {
            id: 'select',
            button: 'browse'
          };
          var keybinding = utilKeybinding('select');

          var _breatheBehavior = behaviorBreathe();

          var _modeDragNode = modeDragNode(context);

          var _selectBehavior;

          var _behaviors = [];
          var _operations = [];
          var _newFeature = false;
          var _follow = false; // `_focusedParentWayId` is used when we visit a vertex with multiple
          // parents, and we want to remember which parent line we started on.

          var _focusedParentWayId;

          var _focusedVertexIds;

          function singular() {
            if (selectedIDs && selectedIDs.length === 1) {
              return context.hasEntity(selectedIDs[0]);
            }
          }

          function selectedEntities() {
            return selectedIDs.map(function (id) {
              return context.hasEntity(id);
            }).filter(Boolean);
          }

          function checkSelectedIDs() {
            var ids = [];

            if (Array.isArray(selectedIDs)) {
              ids = selectedIDs.filter(function (id) {
                return context.hasEntity(id);
              });
            }

            if (!ids.length) {
              context.enter(modeBrowse(context));
              return false;
            } else if (selectedIDs.length > 1 && ids.length === 1 || selectedIDs.length === 1 && ids.length > 1) {
              // switch between single- and multi-select UI
              context.enter(modeSelect(context, ids));
              return false;
            }

            selectedIDs = ids;
            return true;
          } // find the parent ways for nextVertex, previousVertex, and selectParent


          function parentWaysIdsOfSelection(onlyCommonParents) {
            var graph = context.graph();
            var parents = [];

            for (var i = 0; i < selectedIDs.length; i++) {
              var entity = context.hasEntity(selectedIDs[i]);

              if (!entity || entity.geometry(graph) !== 'vertex') {
                return []; // selection includes some non-vertices
              }

              var currParents = graph.parentWays(entity).map(function (w) {
                return w.id;
              });

              if (!parents.length) {
                parents = currParents;
                continue;
              }

              parents = (onlyCommonParents ? utilArrayIntersection : utilArrayUnion)(parents, currParents);

              if (!parents.length) {
                return [];
              }
            }

            return parents;
          } // find the child nodes for selected ways


          function childNodeIdsOfSelection(onlyCommon) {
            var graph = context.graph();
            var childs = [];

            for (var i = 0; i < selectedIDs.length; i++) {
              var entity = context.hasEntity(selectedIDs[i]);

              if (!entity || !['area', 'line'].includes(entity.geometry(graph))) {
                return []; // selection includes non-area/non-line
              }

              var currChilds = graph.childNodes(entity).map(function (node) {
                return node.id;
              });

              if (!childs.length) {
                childs = currChilds;
                continue;
              }

              childs = (onlyCommon ? utilArrayIntersection : utilArrayUnion)(childs, currChilds);

              if (!childs.length) {
                return [];
              }
            }

            return childs;
          }

          function checkFocusedParent() {
            if (_focusedParentWayId) {
              var parents = parentWaysIdsOfSelection(true);
              if (parents.indexOf(_focusedParentWayId) === -1) _focusedParentWayId = null;
            }
          }

          function parentWayIdForVertexNavigation() {
            var parentIds = parentWaysIdsOfSelection(true);

            if (_focusedParentWayId && parentIds.indexOf(_focusedParentWayId) !== -1) {
              // prefer the previously seen parent
              return _focusedParentWayId;
            }

            return parentIds.length ? parentIds[0] : null;
          }

          mode.selectedIDs = function (val) {
            if (!arguments.length) return selectedIDs;
            selectedIDs = val;
            return mode;
          };

          mode.zoomToSelected = function () {
            context.map().zoomToEase(selectedEntities());
          };

          mode.newFeature = function (val) {
            if (!arguments.length) return _newFeature;
            _newFeature = val;
            return mode;
          };

          mode.selectBehavior = function (val) {
            if (!arguments.length) return _selectBehavior;
            _selectBehavior = val;
            return mode;
          };

          mode.follow = function (val) {
            if (!arguments.length) return _follow;
            _follow = val;
            return mode;
          };

          function loadOperations() {
            _operations.forEach(function (operation) {
              if (operation.behavior) {
                context.uninstall(operation.behavior);
              }
            });

            _operations = Object.values(Operations).map(function (o) {
              return o(context, selectedIDs);
            }).filter(function (o) {
              return o.id !== 'delete' && o.id !== 'downgrade' && o.id !== 'copy';
            }).concat([// group copy/downgrade/delete operation together at the end of the list
            operationCopy(context, selectedIDs), operationDowngrade(context, selectedIDs), operationDelete(context, selectedIDs)]).filter(function (operation) {
              return operation.available();
            });

            _operations.forEach(function (operation) {
              if (operation.behavior) {
                context.install(operation.behavior);
              }
            }); // remove any displayed menu


            context.ui().closeEditMenu();
          }

          mode.operations = function () {
            return _operations;
          };

          mode.enter = function () {
            if (!checkSelectedIDs()) return;
            context.features().forceVisible(selectedIDs);

            _modeDragNode.restoreSelectedIDs(selectedIDs);

            loadOperations();

            if (!_behaviors.length) {
              if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
              _behaviors = [behaviorPaste(context), _breatheBehavior, behaviorHover(context).on('hover', context.ui().sidebar.hoverModeSelect), _selectBehavior, behaviorLasso(context), _modeDragNode.behavior, modeDragNote(context).behavior];
            }

            _behaviors.forEach(context.install);

            keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on(['[', 'pgup'], previousVertex).on([']', 'pgdown'], nextVertex).on(['{', uiCmd('⌘['), 'home'], firstVertex).on(['}', uiCmd('⌘]'), 'end'], lastVertex).on(uiCmd('⇧←'), nudgeSelection([-10, 0])).on(uiCmd('⇧↑'), nudgeSelection([0, -10])).on(uiCmd('⇧→'), nudgeSelection([10, 0])).on(uiCmd('⇧↓'), nudgeSelection([0, 10])).on(uiCmd('⇧⌥←'), nudgeSelection([-100, 0])).on(uiCmd('⇧⌥↑'), nudgeSelection([0, -100])).on(uiCmd('⇧⌥→'), nudgeSelection([100, 0])).on(uiCmd('⇧⌥↓'), nudgeSelection([0, 100])).on(utilKeybinding.plusKeys.map(function (key) {
              return uiCmd('⇧' + key);
            }), scaleSelection(1.05)).on(utilKeybinding.plusKeys.map(function (key) {
              return uiCmd('⇧⌥' + key);
            }), scaleSelection(Math.pow(1.05, 5))).on(utilKeybinding.minusKeys.map(function (key) {
              return uiCmd('⇧' + key);
            }), scaleSelection(1 / 1.05)).on(utilKeybinding.minusKeys.map(function (key) {
              return uiCmd('⇧⌥' + key);
            }), scaleSelection(1 / Math.pow(1.05, 5))).on(['\\', 'pause'], focusNextParent).on(uiCmd('⌘↑'), selectParent).on(uiCmd('⌘↓'), selectChild).on('⎋', esc, true);
            select(document).call(keybinding);
            context.ui().sidebar.select(selectedIDs, _newFeature);
            context.history().on('change.select', function () {
              loadOperations(); // reselect after change in case relation members were removed or added

              selectElements();
            }).on('undone.select', checkSelectedIDs).on('redone.select', checkSelectedIDs);
            context.map().on('drawn.select', selectElements).on('crossEditableZoom.select', function () {
              selectElements();

              _breatheBehavior.restartIfNeeded(context.surface());
            });
            context.map().doubleUpHandler().on('doubleUp.modeSelect', didDoubleUp);
            selectElements();

            if (_follow) {
              var extent = geoExtent();
              var graph = context.graph();
              selectedIDs.forEach(function (id) {
                var entity = context.entity(id);

                extent._extend(entity.extent(graph));
              });
              var loc = extent.center();
              context.map().centerEase(loc); // we could enter the mode multiple times, so reset follow for next time

              _follow = false;
            }

            function nudgeSelection(delta) {
              return function () {
                // prevent nudging during low zoom selection
                if (!context.map().withinEditableZoom()) return;
                var moveOp = operationMove(context, selectedIDs);

                if (moveOp.disabled()) {
                  context.ui().flash.duration(4000).iconName('#iD-operation-' + moveOp.id).iconClass('operation disabled').label(moveOp.tooltip)();
                } else {
                  context.perform(actionMove(selectedIDs, delta, context.projection), moveOp.annotation());
                  context.validator().validate();
                }
              };
            }

            function scaleSelection(factor) {
              return function () {
                // prevent scaling during low zoom selection
                if (!context.map().withinEditableZoom()) return;
                var nodes = utilGetAllNodes(selectedIDs, context.graph());
                var isUp = factor > 1; // can only scale if multiple nodes are selected

                if (nodes.length <= 1) return;
                var extent = utilTotalExtent(selectedIDs, context.graph()); // These disabled checks would normally be handled by an operation
                // object, but we don't want an actual scale operation at this point.

                function scalingDisabled() {
                  if (tooSmall()) {
                    return 'too_small';
                  } else if (extent.percentContainedIn(context.map().extent()) < 0.8) {
                    return 'too_large';
                  } else if (someMissing() || selectedIDs.some(incompleteRelation)) {
                    return 'not_downloaded';
                  } else if (selectedIDs.some(context.hasHiddenConnections)) {
                    return 'connected_to_hidden';
                  }

                  return false;

                  function tooSmall() {
                    if (isUp) return false;
                    var dLon = Math.abs(extent[1][0] - extent[0][0]);
                    var dLat = Math.abs(extent[1][1] - extent[0][1]);
                    return dLon < geoMetersToLon(1, extent[1][1]) && dLat < geoMetersToLat(1);
                  }

                  function someMissing() {
                    if (context.inIntro()) return false;
                    var osm = context.connection();

                    if (osm) {
                      var missing = nodes.filter(function (n) {
                        return !osm.isDataLoaded(n.loc);
                      });

                      if (missing.length) {
                        missing.forEach(function (loc) {
                          context.loadTileAtLoc(loc);
                        });
                        return true;
                      }
                    }

                    return false;
                  }

                  function incompleteRelation(id) {
                    var entity = context.entity(id);
                    return entity.type === 'relation' && !entity.isComplete(context.graph());
                  }
                }

                var disabled = scalingDisabled();

                if (disabled) {
                  var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
                  context.ui().flash.duration(4000).iconName('#iD-icon-no').iconClass('operation disabled').label(_t('operations.scale.' + disabled + '.' + multi))();
                } else {
                  var pivot = context.projection(extent.center());
                  var annotation = _t('operations.scale.annotation.' + (isUp ? 'up' : 'down') + '.feature', {
                    n: selectedIDs.length
                  });
                  context.perform(actionScale(selectedIDs, pivot, factor, context.projection), annotation);
                  context.validator().validate();
                }
              };
            }

            function didDoubleUp(d3_event, loc) {
              if (!context.map().withinEditableZoom()) return;
              var target = select(d3_event.target);
              var datum = target.datum();
              var entity = datum && datum.properties && datum.properties.entity;
              if (!entity) return;

              if (entity instanceof osmWay && target.classed('target')) {
                var choice = geoChooseEdge(context.graph().childNodes(entity), loc, context.projection);
                var prev = entity.nodes[choice.index - 1];
                var next = entity.nodes[choice.index];
                context.perform(actionAddMidpoint({
                  loc: choice.loc,
                  edge: [prev, next]
                }, osmNode()), _t('operations.add.annotation.vertex'));
              } else if (entity.type === 'midpoint') {
                context.perform(actionAddMidpoint({
                  loc: entity.loc,
                  edge: entity.edge
                }, osmNode()), _t('operations.add.annotation.vertex'));
              }
            }

            function selectElements() {
              if (!checkSelectedIDs()) return;
              var surface = context.surface();
              surface.selectAll('.selected-member').classed('selected-member', false);
              surface.selectAll('.selected').classed('selected', false);
              surface.selectAll('.related').classed('related', false); // reload `_focusedParentWayId` based on the current selection

              checkFocusedParent();

              if (_focusedParentWayId) {
                surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
              }

              if (context.map().withinEditableZoom()) {
                // Apply selection styling if not in wide selection
                surface.selectAll(utilDeepMemberSelector(selectedIDs, context.graph(), true
                /* skipMultipolgonMembers */
                )).classed('selected-member', true);
                surface.selectAll(utilEntityOrDeepMemberSelector(selectedIDs, context.graph())).classed('selected', true);
              }
            }

            function esc() {
              if (context.container().select('.combobox').size()) return;
              context.enter(modeBrowse(context));
            }

            function firstVertex(d3_event) {
              d3_event.preventDefault();
              var entity = singular();
              var parentId = parentWayIdForVertexNavigation();
              var way;

              if (entity && entity.type === 'way') {
                way = entity;
              } else if (parentId) {
                way = context.entity(parentId);
              }

              _focusedParentWayId = way && way.id;

              if (way) {
                context.enter(mode.selectedIDs([way.first()]).follow(true));
              }
            }

            function lastVertex(d3_event) {
              d3_event.preventDefault();
              var entity = singular();
              var parentId = parentWayIdForVertexNavigation();
              var way;

              if (entity && entity.type === 'way') {
                way = entity;
              } else if (parentId) {
                way = context.entity(parentId);
              }

              _focusedParentWayId = way && way.id;

              if (way) {
                context.enter(mode.selectedIDs([way.last()]).follow(true));
              }
            }

            function previousVertex(d3_event) {
              d3_event.preventDefault();
              var parentId = parentWayIdForVertexNavigation();
              _focusedParentWayId = parentId;
              if (!parentId) return;
              var way = context.entity(parentId);
              var length = way.nodes.length;
              var curr = way.nodes.indexOf(selectedIDs[0]);
              var index = -1;

              if (curr > 0) {
                index = curr - 1;
              } else if (way.isClosed()) {
                index = length - 2;
              }

              if (index !== -1) {
                context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
              }
            }

            function nextVertex(d3_event) {
              d3_event.preventDefault();
              var parentId = parentWayIdForVertexNavigation();
              _focusedParentWayId = parentId;
              if (!parentId) return;
              var way = context.entity(parentId);
              var length = way.nodes.length;
              var curr = way.nodes.indexOf(selectedIDs[0]);
              var index = -1;

              if (curr < length - 1) {
                index = curr + 1;
              } else if (way.isClosed()) {
                index = 0;
              }

              if (index !== -1) {
                context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
              }
            }

            function focusNextParent(d3_event) {
              d3_event.preventDefault();
              var parents = parentWaysIdsOfSelection(true);
              if (!parents || parents.length < 2) return;
              var index = parents.indexOf(_focusedParentWayId);

              if (index < 0 || index > parents.length - 2) {
                _focusedParentWayId = parents[0];
              } else {
                _focusedParentWayId = parents[index + 1];
              }

              var surface = context.surface();
              surface.selectAll('.related').classed('related', false);

              if (_focusedParentWayId) {
                surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
              }
            }

            function selectParent(d3_event) {
              d3_event.preventDefault();
              var currentSelectedIds = mode.selectedIDs();
              var parentIds = _focusedParentWayId ? [_focusedParentWayId] : parentWaysIdsOfSelection(false);
              if (!parentIds.length) return;
              context.enter(mode.selectedIDs(parentIds)); // set this after re-entering the selection since we normally want it cleared on exit

              _focusedVertexIds = currentSelectedIds;
            }

            function selectChild(d3_event) {
              d3_event.preventDefault();
              var currentSelectedIds = mode.selectedIDs();
              var childIds = _focusedVertexIds ? _focusedVertexIds.filter(function (id) {
                return context.hasEntity(id);
              }) : childNodeIdsOfSelection(true);
              if (!childIds || !childIds.length) return;
              if (currentSelectedIds.length === 1) _focusedParentWayId = currentSelectedIds[0];
              context.enter(mode.selectedIDs(childIds));
            }
          };

          mode.exit = function () {
            // we could enter the mode multiple times but it's only new the first time
            _newFeature = false;
            _focusedVertexIds = null;

            _operations.forEach(function (operation) {
              if (operation.behavior) {
                context.uninstall(operation.behavior);
              }
            });

            _operations = [];

            _behaviors.forEach(context.uninstall);

            select(document).call(keybinding.unbind);
            context.ui().closeEditMenu();
            context.history().on('change.select', null).on('undone.select', null).on('redone.select', null);
            var surface = context.surface();
            surface.selectAll('.selected-member').classed('selected-member', false);
            surface.selectAll('.selected').classed('selected', false);
            surface.selectAll('.highlighted').classed('highlighted', false);
            surface.selectAll('.related').classed('related', false);
            context.map().on('drawn.select', null);
            context.ui().sidebar.hide();
            context.features().forceVisible([]);
            var entity = singular();

            if (_newFeature && entity && entity.type === 'relation' && // no tags
            Object.keys(entity.tags).length === 0 && // no parent relations
            context.graph().parentRelations(entity).length === 0 && ( // no members or one member with no role
            entity.members.length === 0 || entity.members.length === 1 && !entity.members[0].role)) {
              // the user added this relation but didn't edit it at all, so just delete it
              var deleteAction = actionDeleteRelation(entity.id, true
              /* don't delete untagged members */
              );
              context.perform(deleteAction, _t('operations.delete.annotation.relation'));
            }
          };

          return mode;
        }

        function uiLasso(context) {
          var group, polygon;
          lasso.coordinates = [];

          function lasso(selection) {
            context.container().classed('lasso', true);
            group = selection.append('g').attr('class', 'lasso hide');
            polygon = group.append('path').attr('class', 'lasso-path');
            group.call(uiToggle(true));
          }

          function draw() {
            if (polygon) {
              polygon.data([lasso.coordinates]).attr('d', function (d) {
                return 'M' + d.join(' L') + ' Z';
              });
            }
          }

          lasso.extent = function () {
            return lasso.coordinates.reduce(function (extent, point) {
              return extent.extend(geoExtent(point));
            }, geoExtent());
          };

          lasso.p = function (_) {
            if (!arguments.length) return lasso;
            lasso.coordinates.push(_);
            draw();
            return lasso;
          };

          lasso.close = function () {
            if (group) {
              group.call(uiToggle(false, function () {
                select(this).remove();
              }));
            }

            context.container().classed('lasso', false);
          };

          return lasso;
        }

        function behaviorLasso(context) {
          // use pointer events on supported platforms; fallback to mouse events
          var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

          var behavior = function behavior(selection) {
            var lasso;

            function pointerdown(d3_event) {
              var button = 0; // left

              if (d3_event.button === button && d3_event.shiftKey === true) {
                lasso = null;
                select(window).on(_pointerPrefix + 'move.lasso', pointermove).on(_pointerPrefix + 'up.lasso', pointerup);
                d3_event.stopPropagation();
              }
            }

            function pointermove() {
              if (!lasso) {
                lasso = uiLasso(context);
                context.surface().call(lasso);
              }

              lasso.p(context.map().mouse());
            }

            function normalize(a, b) {
              return [[Math.min(a[0], b[0]), Math.min(a[1], b[1])], [Math.max(a[0], b[0]), Math.max(a[1], b[1])]];
            }

            function lassoed() {
              if (!lasso) return [];
              var graph = context.graph();
              var limitToNodes;

              if (context.map().editableDataEnabled(true
              /* skipZoomCheck */
              ) && context.map().isInWideSelection()) {
                // only select from the visible nodes
                limitToNodes = new Set(utilGetAllNodes(context.selectedIDs(), graph));
              } else if (!context.map().editableDataEnabled()) {
                return [];
              }

              var bounds = lasso.extent().map(context.projection.invert);
              var extent = geoExtent(normalize(bounds[0], bounds[1]));
              var intersects = context.history().intersects(extent).filter(function (entity) {
                return entity.type === 'node' && (!limitToNodes || limitToNodes.has(entity)) && geoPointInPolygon(context.projection(entity.loc), lasso.coordinates) && !context.features().isHidden(entity, graph, entity.geometry(graph));
              }); // sort the lassoed nodes as best we can

              intersects.sort(function (node1, node2) {
                var parents1 = graph.parentWays(node1);
                var parents2 = graph.parentWays(node2);

                if (parents1.length && parents2.length) {
                  // both nodes are vertices
                  var sharedParents = utilArrayIntersection(parents1, parents2);

                  if (sharedParents.length) {
                    var sharedParentNodes = sharedParents[0].nodes; // vertices are members of the same way; sort them in their listed order

                    return sharedParentNodes.indexOf(node1.id) - sharedParentNodes.indexOf(node2.id);
                  } else {
                    // vertices do not share a way; group them by their respective parent ways
                    return parseFloat(parents1[0].id.slice(1)) - parseFloat(parents2[0].id.slice(1));
                  }
                } else if (parents1.length || parents2.length) {
                  // only one node is a vertex; sort standalone points before vertices
                  return parents1.length - parents2.length;
                } // both nodes are standalone points; sort left to right


                return node1.loc[0] - node2.loc[0];
              });
              return intersects.map(function (entity) {
                return entity.id;
              });
            }

            function pointerup() {
              select(window).on(_pointerPrefix + 'move.lasso', null).on(_pointerPrefix + 'up.lasso', null);
              if (!lasso) return;
              var ids = lassoed();
              lasso.close();

              if (ids.length) {
                context.enter(modeSelect(context, ids));
              }
            }

            selection.on(_pointerPrefix + 'down.lasso', pointerdown);
          };

          behavior.off = function (selection) {
            selection.on(_pointerPrefix + 'down.lasso', null);
          };

          return behavior;
        }

        function modeBrowse(context) {
          var mode = {
            button: 'browse',
            id: 'browse',
            title: _t('modes.browse.title'),
            description: _t('modes.browse.description')
          };
          var sidebar;

          var _selectBehavior;

          var _behaviors = [];

          mode.selectBehavior = function (val) {
            if (!arguments.length) return _selectBehavior;
            _selectBehavior = val;
            return mode;
          };

          mode.enter = function () {
            if (!_behaviors.length) {
              if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
              _behaviors = [behaviorPaste(context), behaviorHover(context).on('hover', context.ui().sidebar.hover), _selectBehavior, behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
            }

            _behaviors.forEach(context.install); // Get focus on the body.


            if (document.activeElement && document.activeElement.blur) {
              document.activeElement.blur();
            }

            if (sidebar) {
              context.ui().sidebar.show(sidebar);
            } else {
              context.ui().sidebar.select(null);
            }
          };

          mode.exit = function () {
            context.ui().sidebar.hover.cancel();

            _behaviors.forEach(context.uninstall);

            if (sidebar) {
              context.ui().sidebar.hide();
            }
          };

          mode.sidebar = function (_) {
            if (!arguments.length) return sidebar;
            sidebar = _;
            return mode;
          };

          mode.operations = function () {
            return [operationPaste(context)];
          };

          return mode;
        }

        function behaviorAddWay(context) {
          var dispatch = dispatch$8('start', 'startFromWay', 'startFromNode');
          var draw = behaviorDraw(context);

          function behavior(surface) {
            draw.on('click', function () {
              dispatch.apply('start', this, arguments);
            }).on('clickWay', function () {
              dispatch.apply('startFromWay', this, arguments);
            }).on('clickNode', function () {
              dispatch.apply('startFromNode', this, arguments);
            }).on('cancel', behavior.cancel).on('finish', behavior.cancel);
            context.map().dblclickZoomEnable(false);
            surface.call(draw);
          }

          behavior.off = function (surface) {
            surface.call(draw.off);
          };

          behavior.cancel = function () {
            window.setTimeout(function () {
              context.map().dblclickZoomEnable(true);
            }, 1000);
            context.enter(modeBrowse(context));
          };

          return utilRebind(behavior, dispatch, 'on');
        }

        function behaviorHash(context) {
          // cached window.location.hash
          var _cachedHash = null; // allowable latitude range

          var _latitudeLimit = 90 - 1e-8;

          function computedHashParameters() {
            var map = context.map();
            var center = map.center();
            var zoom = map.zoom();
            var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
            var oldParams = utilObjectOmit(utilStringQs(window.location.hash), ['comment', 'source', 'hashtags', 'walkthrough']);
            var newParams = {};
            delete oldParams.id;
            var selected = context.selectedIDs().filter(function (id) {
              return context.hasEntity(id);
            });

            if (selected.length) {
              newParams.id = selected.join(',');
            }

            newParams.map = zoom.toFixed(2) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
            return Object.assign(oldParams, newParams);
          }

          function computedHash() {
            return '#' + utilQsString(computedHashParameters(), true);
          }

          function computedTitle(includeChangeCount) {
            var baseTitle = context.documentTitleBase() || 'iD';
            var contextual;
            var changeCount;
            var titleID;
            var selected = context.selectedIDs().filter(function (id) {
              return context.hasEntity(id);
            });

            if (selected.length) {
              var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());

              if (selected.length > 1) {
                contextual = _t('title.labeled_and_more', {
                  labeled: firstLabel,
                  count: selected.length - 1
                });
              } else {
                contextual = firstLabel;
              }

              titleID = 'context';
            }

            if (includeChangeCount) {
              changeCount = context.history().difference().summary().length;

              if (changeCount > 0) {
                titleID = contextual ? 'changes_context' : 'changes';
              }
            }

            if (titleID) {
              return _t('title.format.' + titleID, {
                changes: changeCount,
                base: baseTitle,
                context: contextual
              });
            }

            return baseTitle;
          }

          function updateTitle(includeChangeCount) {
            if (!context.setsDocumentTitle()) return;
            var newTitle = computedTitle(includeChangeCount);

            if (document.title !== newTitle) {
              document.title = newTitle;
            }
          }

          function updateHashIfNeeded() {
            if (context.inIntro()) return;
            var latestHash = computedHash();

            if (_cachedHash !== latestHash) {
              _cachedHash = latestHash; // Update the URL hash without affecting the browser navigation stack,
              // though unavoidably creating a browser history entry

              window.history.replaceState(null, computedTitle(false
              /* includeChangeCount */
              ), latestHash); // set the title we want displayed for the browser tab/window

              updateTitle(true
              /* includeChangeCount */
              );
            }
          }

          var _throttledUpdate = throttle(updateHashIfNeeded, 500);

          var _throttledUpdateTitle = throttle(function () {
            updateTitle(true
            /* includeChangeCount */
            );
          }, 500);

          function hashchange() {
            // ignore spurious hashchange events
            if (window.location.hash === _cachedHash) return;
            _cachedHash = window.location.hash;
            var q = utilStringQs(_cachedHash);
            var mapArgs = (q.map || '').split('/').map(Number);

            if (mapArgs.length < 3 || mapArgs.some(isNaN)) {
              // replace bogus hash
              updateHashIfNeeded();
            } else {
              // don't update if the new hash already reflects the state of iD
              if (_cachedHash === computedHash()) return;
              var mode = context.mode();
              context.map().centerZoom([mapArgs[2], Math.min(_latitudeLimit, Math.max(-_latitudeLimit, mapArgs[1]))], mapArgs[0]);

              if (q.id && mode) {
                var ids = q.id.split(',').filter(function (id) {
                  return context.hasEntity(id);
                });

                if (ids.length && (mode.id === 'browse' || mode.id === 'select' && !utilArrayIdentical(mode.selectedIDs(), ids))) {
                  context.enter(modeSelect(context, ids));
                  return;
                }
              }

              var center = context.map().center();
              var dist = geoSphericalDistance(center, [mapArgs[2], mapArgs[1]]);
              var maxdist = 500; // Don't allow the hash location to change too much while drawing
              // This can happen if the user accidentally hit the back button.  #3996

              if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
                context.enter(modeBrowse(context));
                return;
              }
            }
          }

          function behavior() {
            context.map().on('move.behaviorHash', _throttledUpdate);
            context.history().on('change.behaviorHash', _throttledUpdateTitle);
            context.on('enter.behaviorHash', _throttledUpdate);
            select(window).on('hashchange.behaviorHash', hashchange);

            if (window.location.hash) {
              var q = utilStringQs(window.location.hash);

              if (q.id) {
                //if (!context.history().hasRestorableChanges()) {
                // targeting specific features: download, select, and zoom to them
                context.zoomToEntity(q.id.split(',')[0], !q.map); //}
              }

              if (q.walkthrough === 'true') {
                behavior.startWalkthrough = true;
              }

              if (q.map) {
                behavior.hadHash = true;
              }

              hashchange();
              updateTitle(false);
            }
          }

          behavior.off = function () {
            _throttledUpdate.cancel();

            _throttledUpdateTitle.cancel();

            context.map().on('move.behaviorHash', null);
            context.on('enter.behaviorHash', null);
            select(window).on('hashchange.behaviorHash', null);
            window.location.hash = '';
          };

          return behavior;
        }

        // This is only done in testing because of the performance penalty.

        var debug = false; // Reexport just what our tests use, see #4379
        var d3 = {
          dispatch: dispatch$8,
          geoMercator: mercator,
          geoProjection: projection,
          polygonArea: d3_polygonArea,
          polygonCentroid: d3_polygonCentroid,
          select: select,
          selectAll: selectAll,
          timerFlush: timerFlush
        };

        var iD = /*#__PURE__*/Object.freeze({
                __proto__: null,
                debug: debug,
                d3: d3,
                actionAddEntity: actionAddEntity,
                actionAddMember: actionAddMember,
                actionAddMidpoint: actionAddMidpoint,
                actionAddVertex: actionAddVertex,
                actionChangeMember: actionChangeMember,
                actionChangePreset: actionChangePreset,
                actionChangeTags: actionChangeTags,
                actionCircularize: actionCircularize,
                actionConnect: actionConnect,
                actionCopyEntities: actionCopyEntities,
                actionDeleteMember: actionDeleteMember,
                actionDeleteMultiple: actionDeleteMultiple,
                actionDeleteNode: actionDeleteNode,
                actionDeleteRelation: actionDeleteRelation,
                actionDeleteWay: actionDeleteWay,
                actionDiscardTags: actionDiscardTags,
                actionDisconnect: actionDisconnect,
                actionExtract: actionExtract,
                actionJoin: actionJoin,
                actionMerge: actionMerge,
                actionMergeNodes: actionMergeNodes,
                actionMergePolygon: actionMergePolygon,
                actionMergeRemoteChanges: actionMergeRemoteChanges,
                actionMove: actionMove,
                actionMoveMember: actionMoveMember,
                actionMoveNode: actionMoveNode,
                actionNoop: actionNoop,
                actionOrthogonalize: actionOrthogonalize,
                actionRestrictTurn: actionRestrictTurn,
                actionReverse: actionReverse,
                actionRevert: actionRevert,
                actionRotate: actionRotate,
                actionScale: actionScale,
                actionSplit: actionSplit,
                actionStraightenNodes: actionStraightenNodes,
                actionStraightenWay: actionStraightenWay,
                actionUnrestrictTurn: actionUnrestrictTurn,
                actionReflect: actionReflect,
                actionUpgradeTags: actionUpgradeTags,
                behaviorAddWay: behaviorAddWay,
                behaviorBreathe: behaviorBreathe,
                behaviorDrag: behaviorDrag,
                behaviorDrawWay: behaviorDrawWay,
                behaviorDraw: behaviorDraw,
                behaviorEdit: behaviorEdit,
                behaviorHash: behaviorHash,
                behaviorHover: behaviorHover,
                behaviorLasso: behaviorLasso,
                behaviorOperation: behaviorOperation,
                behaviorPaste: behaviorPaste,
                behaviorSelect: behaviorSelect,
                coreContext: coreContext,
                coreFileFetcher: coreFileFetcher,
                fileFetcher: _mainFileFetcher,
                coreDifference: coreDifference,
                coreGraph: coreGraph,
                coreHistory: coreHistory,
                coreLocalizer: coreLocalizer,
                t: _t,
                localizer: _mainLocalizer,
                coreLocations: coreLocations,
                locationManager: _mainLocations,
                prefs: corePreferences,
                coreTree: coreTree,
                coreUploader: coreUploader,
                coreValidator: coreValidator,
                geoExtent: geoExtent,
                geoLatToMeters: geoLatToMeters,
                geoLonToMeters: geoLonToMeters,
                geoMetersToLat: geoMetersToLat,
                geoMetersToLon: geoMetersToLon,
                geoMetersToOffset: geoMetersToOffset,
                geoOffsetToMeters: geoOffsetToMeters,
                geoScaleToZoom: geoScaleToZoom,
                geoSphericalClosestNode: geoSphericalClosestNode,
                geoSphericalDistance: geoSphericalDistance,
                geoZoomToScale: geoZoomToScale,
                geoAngle: geoAngle,
                geoChooseEdge: geoChooseEdge,
                geoEdgeEqual: geoEdgeEqual,
                geoGetSmallestSurroundingRectangle: geoGetSmallestSurroundingRectangle,
                geoHasLineIntersections: geoHasLineIntersections,
                geoHasSelfIntersections: geoHasSelfIntersections,
                geoRotate: geoRotate,
                geoLineIntersection: geoLineIntersection,
                geoPathHasIntersections: geoPathHasIntersections,
                geoPathIntersections: geoPathIntersections,
                geoPathLength: geoPathLength,
                geoPointInPolygon: geoPointInPolygon,
                geoPolygonContainsPolygon: geoPolygonContainsPolygon,
                geoPolygonIntersectsPolygon: geoPolygonIntersectsPolygon,
                geoViewportEdge: geoViewportEdge,
                geoRawMercator: geoRawMercator,
                geoVecAdd: geoVecAdd,
                geoVecAngle: geoVecAngle,
                geoVecCross: geoVecCross,
                geoVecDot: geoVecDot,
                geoVecEqual: geoVecEqual,
                geoVecFloor: geoVecFloor,
                geoVecInterp: geoVecInterp,
                geoVecLength: geoVecLength,
                geoVecLengthSquare: geoVecLengthSquare,
                geoVecNormalize: geoVecNormalize,
                geoVecNormalizedDot: geoVecNormalizedDot,
                geoVecProject: geoVecProject,
                geoVecSubtract: geoVecSubtract,
                geoVecScale: geoVecScale,
                geoOrthoNormalizedDotProduct: geoOrthoNormalizedDotProduct,
                geoOrthoCalcScore: geoOrthoCalcScore,
                geoOrthoMaxOffsetAngle: geoOrthoMaxOffsetAngle,
                geoOrthoCanOrthogonalize: geoOrthoCanOrthogonalize,
                modeAddArea: modeAddArea,
                modeAddLine: modeAddLine,
                modeAddPoint: modeAddPoint,
                modeAddNote: modeAddNote,
                modeBrowse: modeBrowse,
                modeDragNode: modeDragNode,
                modeDragNote: modeDragNote,
                modeDrawArea: modeDrawArea,
                modeDrawLine: modeDrawLine,
                modeMove: modeMove,
                modeRotate: modeRotate,
                modeSave: modeSave,
                modeSelect: modeSelect,
                modeSelectData: modeSelectData,
                modeSelectError: modeSelectError,
                modeSelectNote: modeSelectNote,
                operationCircularize: operationCircularize,
                operationContinue: operationContinue,
                operationCopy: operationCopy,
                operationDelete: operationDelete,
                operationDisconnect: operationDisconnect,
                operationDowngrade: operationDowngrade,
                operationExtract: operationExtract,
                operationMerge: operationMerge,
                operationMove: operationMove,
                operationOrthogonalize: operationOrthogonalize,
                operationPaste: operationPaste,
                operationReflectShort: operationReflectShort,
                operationReflectLong: operationReflectLong,
                operationReverse: operationReverse,
                operationRotate: operationRotate,
                operationSplit: operationSplit,
                operationStraighten: operationStraighten,
                osmChangeset: osmChangeset,
                osmEntity: osmEntity,
                osmNode: osmNode,
                osmNote: osmNote,
                osmRelation: osmRelation,
                osmWay: osmWay,
                QAItem: QAItem,
                osmIntersection: osmIntersection,
                osmTurn: osmTurn,
                osmInferRestriction: osmInferRestriction,
                osmLanes: osmLanes,
                osmOldMultipolygonOuterMemberOfRelation: osmOldMultipolygonOuterMemberOfRelation,
                osmIsOldMultipolygonOuterMember: osmIsOldMultipolygonOuterMember,
                osmOldMultipolygonOuterMember: osmOldMultipolygonOuterMember,
                osmJoinWays: osmJoinWays,
                get osmAreaKeys () { return osmAreaKeys; },
                osmSetAreaKeys: osmSetAreaKeys,
                osmTagSuggestingArea: osmTagSuggestingArea,
                get osmPointTags () { return osmPointTags; },
                osmSetPointTags: osmSetPointTags,
                get osmVertexTags () { return osmVertexTags; },
                osmSetVertexTags: osmSetVertexTags,
                osmNodeGeometriesForTags: osmNodeGeometriesForTags,
                osmOneWayTags: osmOneWayTags,
                osmPavedTags: osmPavedTags,
                osmIsInterestingTag: osmIsInterestingTag,
                osmRoutableHighwayTagValues: osmRoutableHighwayTagValues,
                osmFlowingWaterwayTagValues: osmFlowingWaterwayTagValues,
                osmRailwayTrackTagValues: osmRailwayTrackTagValues,
                presetCategory: presetCategory,
                presetCollection: presetCollection,
                presetField: presetField,
                presetPreset: presetPreset,
                presetManager: _mainPresetIndex,
                presetIndex: presetIndex,
                rendererBackgroundSource: rendererBackgroundSource,
                rendererBackground: rendererBackground,
                rendererFeatures: rendererFeatures,
                rendererMap: rendererMap,
                rendererPhotos: rendererPhotos,
                rendererTileLayer: rendererTileLayer,
                services: services,
                serviceKeepRight: serviceKeepRight,
                serviceImproveOSM: serviceImproveOSM,
                serviceOsmose: serviceOsmose,
                serviceMapillary: serviceMapillary,
                serviceMapRules: serviceMapRules,
                serviceNominatim: serviceNominatim,
                serviceNsi: serviceNsi,
                serviceOpenstreetcam: serviceOpenstreetcam,
                serviceOsm: serviceOsm,
                serviceOsmWikibase: serviceOsmWikibase,
                serviceStreetside: serviceStreetside,
                serviceTaginfo: serviceTaginfo,
                serviceVectorTile: serviceVectorTile,
                serviceWikidata: serviceWikidata,
                serviceWikipedia: serviceWikipedia,
                svgAreas: svgAreas,
                svgData: svgData,
                svgDebug: svgDebug,
                svgDefs: svgDefs,
                svgKeepRight: svgKeepRight,
                svgIcon: svgIcon,
                svgGeolocate: svgGeolocate,
                svgLabels: svgLabels,
                svgLayers: svgLayers,
                svgLines: svgLines,
                svgMapillaryImages: svgMapillaryImages,
                svgMapillarySigns: svgMapillarySigns,
                svgMidpoints: svgMidpoints,
                svgNotes: svgNotes,
                svgMarkerSegments: svgMarkerSegments,
                svgOpenstreetcamImages: svgOpenstreetcamImages,
                svgOsm: svgOsm,
                svgPassiveVertex: svgPassiveVertex,
                svgPath: svgPath,
                svgPointTransform: svgPointTransform,
                svgPoints: svgPoints,
                svgRelationMemberTags: svgRelationMemberTags,
                svgSegmentWay: svgSegmentWay,
                svgStreetside: svgStreetside,
                svgTagClasses: svgTagClasses,
                svgTagPattern: svgTagPattern,
                svgTouch: svgTouch,
                svgTurns: svgTurns,
                svgVertices: svgVertices,
                uiFieldDefaultCheck: uiFieldCheck,
                uiFieldOnewayCheck: uiFieldCheck,
                uiFieldCheck: uiFieldCheck,
                uiFieldManyCombo: uiFieldCombo,
                uiFieldMultiCombo: uiFieldCombo,
                uiFieldNetworkCombo: uiFieldCombo,
                uiFieldSemiCombo: uiFieldCombo,
                uiFieldTypeCombo: uiFieldCombo,
                uiFieldCombo: uiFieldCombo,
                uiFieldUrl: uiFieldText,
                uiFieldIdentifier: uiFieldText,
                uiFieldNumber: uiFieldText,
                uiFieldTel: uiFieldText,
                uiFieldEmail: uiFieldText,
                uiFieldText: uiFieldText,
                uiFieldAccess: uiFieldAccess,
                uiFieldAddress: uiFieldAddress,
                uiFieldCycleway: uiFieldCycleway,
                uiFieldLanes: uiFieldLanes,
                uiFieldLocalized: uiFieldLocalized,
                uiFieldRoadspeed: uiFieldRoadspeed,
                uiFieldStructureRadio: uiFieldRadio,
                uiFieldRadio: uiFieldRadio,
                uiFieldRestrictions: uiFieldRestrictions,
                uiFieldTextarea: uiFieldTextarea,
                uiFieldWikidata: uiFieldWikidata,
                uiFieldWikipedia: uiFieldWikipedia,
                uiFields: uiFields,
                uiIntro: uiIntro,
                uiPanelBackground: uiPanelBackground,
                uiPanelHistory: uiPanelHistory,
                uiPanelLocation: uiPanelLocation,
                uiPanelMeasurement: uiPanelMeasurement,
                uiInfoPanels: uiInfoPanels,
                uiPaneBackground: uiPaneBackground,
                uiPaneHelp: uiPaneHelp,
                uiPaneIssues: uiPaneIssues,
                uiPaneMapData: uiPaneMapData,
                uiPanePreferences: uiPanePreferences,
                uiSectionBackgroundDisplayOptions: uiSectionBackgroundDisplayOptions,
                uiSectionBackgroundList: uiSectionBackgroundList,
                uiSectionBackgroundOffset: uiSectionBackgroundOffset,
                uiSectionChanges: uiSectionChanges,
                uiSectionDataLayers: uiSectionDataLayers,
                uiSectionEntityIssues: uiSectionEntityIssues,
                uiSectionFeatureType: uiSectionFeatureType,
                uiSectionMapFeatures: uiSectionMapFeatures,
                uiSectionMapStyleOptions: uiSectionMapStyleOptions,
                uiSectionOverlayList: uiSectionOverlayList,
                uiSectionPhotoOverlays: uiSectionPhotoOverlays,
                uiSectionPresetFields: uiSectionPresetFields,
                uiSectionPrivacy: uiSectionPrivacy,
                uiSectionRawMemberEditor: uiSectionRawMemberEditor,
                uiSectionRawMembershipEditor: uiSectionRawMembershipEditor,
                uiSectionRawTagEditor: uiSectionRawTagEditor,
                uiSectionSelectionList: uiSectionSelectionList,
                uiSectionValidationIssues: uiSectionValidationIssues,
                uiSectionValidationOptions: uiSectionValidationOptions,
                uiSectionValidationRules: uiSectionValidationRules,
                uiSectionValidationStatus: uiSectionValidationStatus,
                uiSettingsCustomBackground: uiSettingsCustomBackground,
                uiSettingsCustomData: uiSettingsCustomData,
                uiInit: uiInit,
                uiAccount: uiAccount,
                uiAttribution: uiAttribution,
                uiChangesetEditor: uiChangesetEditor,
                uiCmd: uiCmd,
                uiCombobox: uiCombobox,
                uiCommit: uiCommit,
                uiCommitWarnings: uiCommitWarnings,
                uiConfirm: uiConfirm,
                uiConflicts: uiConflicts,
                uiContributors: uiContributors,
                uiCurtain: uiCurtain,
                uiDataEditor: uiDataEditor,
                uiDataHeader: uiDataHeader,
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                uiEntityEditor: uiEntityEditor,
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                uiImproveOsmDetails: uiImproveOsmDetails,
                uiImproveOsmEditor: uiImproveOsmEditor,
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                uiInspector: uiInspector,
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                uiKeepRightEditor: uiKeepRightEditor,
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                uiNoteComments: uiNoteComments,
                uiNoteEditor: uiNoteEditor,
                uiNoteHeader: uiNoteHeader,
                uiNoteReport: uiNoteReport,
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                utilAesDecrypt: utilAesDecrypt,
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                utilArrayDifference: utilArrayDifference,
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                utilArrayGroupBy: utilArrayGroupBy,
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                utilArrayUnion: utilArrayUnion,
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                utilTagText: utilTagText,
                utilTiler: utilTiler,
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                utilUnicodeCharsTruncated: utilUnicodeCharsTruncated,
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                validationCloseNodes: validationCloseNodes,
                validationCrossingWays: validationCrossingWays,
                validationDisconnectedWay: validationDisconnectedWay,
                validationFormatting: validationFormatting,
                validationHelpRequest: validationHelpRequest,
                validationImpossibleOneway: validationImpossibleOneway,
                validationIncompatibleSource: validationIncompatibleSource,
                validationMaprules: validationMaprules,
                validationMismatchedGeometry: validationMismatchedGeometry,
                validationMissingRole: validationMissingRole,
                validationMissingTag: validationMissingTag,
                validationOutdatedTags: validationOutdatedTags,
                validationPrivateData: validationPrivateData,
                validationSuspiciousName: validationSuspiciousName,
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