+/*
+ * @class Polygon
+ * @aka L.Polygon
+ * @inherits Polyline
+ *
+ * A class for drawing polygon overlays on a map. Extends `Polyline`.
+ *
+ * Note that points you pass when creating a polygon shouldn't have an additional last point equal to the first one — it's better to filter out such points.
+ *
+ *
+ * @example
+ *
+ * ```js
+ * // create a red polygon from an array of LatLng points
+ * var latlngs = [[-111.03, 41],[-111.04, 45],[-104.05, 45],[-104.05, 41]];
+ *
+ * var polygon = L.polygon(latlngs, {color: 'red'}).addTo(map);
+ *
+ * // zoom the map to the polygon
+ * map.fitBounds(polygon.getBounds());
+ * ```
+ *
+ * You can also pass an array of arrays of latlngs, with the first array representing the outer shape and the other arrays representing holes in the outer shape:
+ *
+ * ```js
+ * var latlngs = [
+ * [[-111.03, 41],[-111.04, 45],[-104.05, 45],[-104.05, 41]], // outer ring
+ * [[-108.58,37.29],[-108.58,40.71],[-102.50,40.71],[-102.50,37.29]] // hole
+ * ];
+ * ```
+ *
+ * Additionally, you can pass a multi-dimensional array to represent a MultiPolygon shape.
+ *
+ * ```js
+ * var latlngs = [
+ * [ // first polygon
+ * [[-111.03, 41],[-111.04, 45],[-104.05, 45],[-104.05, 41]], // outer ring
+ * [[-108.58,37.29],[-108.58,40.71],[-102.50,40.71],[-102.50,37.29]] // hole
+ * ],
+ * [ // second polygon
+ * [[-109.05, 37],[-109.03, 41],[-102.05, 41],[-102.04, 37],[-109.05, 38]]
+ * ]
+ * ];
+ * ```
+ */
+
+L.Polygon = L.Polyline.extend({
+
+ options: {
+ fill: true
+ },
+
+ isEmpty: function () {
+ return !this._latlngs.length || !this._latlngs[0].length;
+ },
+
+ getCenter: function () {
+ // throws error when not yet added to map as this center calculation requires projected coordinates
+ if (!this._map) {
+ throw new Error('Must add layer to map before using getCenter()');
+ }
+
+ var i, j, p1, p2, f, area, x, y, center,
+ points = this._rings[0],
+ len = points.length;
+
+ if (!len) { return null; }
+
+ // polygon centroid algorithm; only uses the first ring if there are multiple
+
+ area = x = y = 0;
+
+ for (i = 0, j = len - 1; i < len; j = i++) {
+ p1 = points[i];
+ p2 = points[j];
+
+ f = p1.y * p2.x - p2.y * p1.x;
+ x += (p1.x + p2.x) * f;
+ y += (p1.y + p2.y) * f;
+ area += f * 3;
+ }
+
+ if (area === 0) {
+ // Polygon is so small that all points are on same pixel.
+ center = points[0];
+ } else {
+ center = [x / area, y / area];
+ }
+ return this._map.layerPointToLatLng(center);
+ },
+
+ _convertLatLngs: function (latlngs) {
+ var result = L.Polyline.prototype._convertLatLngs.call(this, latlngs),
+ len = result.length;
+
+ // remove last point if it equals first one
+ if (len >= 2 && result[0] instanceof L.LatLng && result[0].equals(result[len - 1])) {
+ result.pop();
+ }
+ return result;
+ },
+
+ _setLatLngs: function (latlngs) {
+ L.Polyline.prototype._setLatLngs.call(this, latlngs);
+ if (L.Polyline._flat(this._latlngs)) {
+ this._latlngs = [this._latlngs];
+ }
+ },
+
+ _defaultShape: function () {
+ return L.Polyline._flat(this._latlngs[0]) ? this._latlngs[0] : this._latlngs[0][0];
+ },
+
+ _clipPoints: function () {
+ // polygons need a different clipping algorithm so we redefine that
+
+ var bounds = this._renderer._bounds,
+ w = this.options.weight,
+ p = new L.Point(w, w);
+
+ // increase clip padding by stroke width to avoid stroke on clip edges
+ bounds = new L.Bounds(bounds.min.subtract(p), bounds.max.add(p));
+
+ this._parts = [];
+ if (!this._pxBounds || !this._pxBounds.intersects(bounds)) {
+ return;
+ }
+
+ if (this.options.noClip) {
+ this._parts = this._rings;
+ return;
+ }
+
+ for (var i = 0, len = this._rings.length, clipped; i < len; i++) {
+ clipped = L.PolyUtil.clipPolygon(this._rings[i], bounds, true);
+ if (clipped.length) {
+ this._parts.push(clipped);
+ }
+ }
+ },
+
+ _updatePath: function () {
+ this._renderer._updatePoly(this, true);
+ }
+});
+
+
+// @factory L.polygon(latlngs: LatLng[], options?: Polyline options)
+L.polygon = function (latlngs, options) {
+ return new L.Polygon(latlngs, options);
+};
+
+
+
+/*
+ * L.Rectangle extends Polygon and creates a rectangle when passed a LatLngBounds object.
+ */
+
+/*
+ * @class Rectangle
+ * @aka L.Retangle
+ * @inherits Polygon
+ *
+ * A class for drawing rectangle overlays on a map. Extends `Polygon`.
+ *
+ * @example
+ *
+ * ```js
+ * // define rectangle geographical bounds
+ * var bounds = [[54.559322, -5.767822], [56.1210604, -3.021240]];
+ *
+ * // create an orange rectangle
+ * L.rectangle(bounds, {color: "#ff7800", weight: 1}).addTo(map);
+ *
+ * // zoom the map to the rectangle bounds
+ * map.fitBounds(bounds);
+ * ```
+ *
+ */
+
+
+L.Rectangle = L.Polygon.extend({
+ initialize: function (latLngBounds, options) {
+ L.Polygon.prototype.initialize.call(this, this._boundsToLatLngs(latLngBounds), options);
+ },
+
+ // @method setBounds(latLngBounds: LatLngBounds): this
+ // Redraws the rectangle with the passed bounds.
+ setBounds: function (latLngBounds) {
+ return this.setLatLngs(this._boundsToLatLngs(latLngBounds));
+ },
+
+ _boundsToLatLngs: function (latLngBounds) {
+ latLngBounds = L.latLngBounds(latLngBounds);
+ return [
+ latLngBounds.getSouthWest(),
+ latLngBounds.getNorthWest(),
+ latLngBounds.getNorthEast(),
+ latLngBounds.getSouthEast()
+ ];
+ }
+});
+
+
+// @factory L.rectangle(latLngBounds: LatLngBounds, options?: Polyline options)
+L.rectangle = function (latLngBounds, options) {
+ return new L.Rectangle(latLngBounds, options);
+};
+
+
+
+/*
+ * @class CircleMarker
+ * @aka L.CircleMarker
+ * @inherits Path
+ *
+ * A circle of a fixed size with radius specified in pixels. Extends `Path`.
+ */
+
+L.CircleMarker = L.Path.extend({
+
+ // @section
+ // @aka CircleMarker options
+ options: {
+ fill: true,
+
+ // @option radius: Number = 10
+ // Radius of the circle marker, in pixels
+ radius: 10
+ },
+
+ initialize: function (latlng, options) {
+ L.setOptions(this, options);
+ this._latlng = L.latLng(latlng);
+ this._radius = this.options.radius;
+ },
+
+ // @method setLatLng(latLng: LatLng): this
+ // Sets the position of a circle marker to a new location.
+ setLatLng: function (latlng) {
+ this._latlng = L.latLng(latlng);
+ this.redraw();
+ return this.fire('move', {latlng: this._latlng});
+ },
+
+ // @method getLatLng(): LatLng
+ // Returns the current geographical position of the circle marker
+ getLatLng: function () {
+ return this._latlng;
+ },
+
+ // @method setRadius(radius: Number): this
+ // Sets the radius of a circle marker. Units are in pixels.
+ setRadius: function (radius) {
+ this.options.radius = this._radius = radius;
+ return this.redraw();
+ },
+
+ // @method getRadius(): Number
+ // Returns the current radius of the circle
+ getRadius: function () {
+ return this._radius;
+ },
+
+ setStyle : function (options) {
+ var radius = options && options.radius || this._radius;
+ L.Path.prototype.setStyle.call(this, options);
+ this.setRadius(radius);
+ return this;
+ },
+
+ _project: function () {
+ this._point = this._map.latLngToLayerPoint(this._latlng);
+ this._updateBounds();
+ },
+
+ _updateBounds: function () {
+ var r = this._radius,
+ r2 = this._radiusY || r,
+ w = this._clickTolerance(),
+ p = [r + w, r2 + w];
+ this._pxBounds = new L.Bounds(this._point.subtract(p), this._point.add(p));
+ },
+
+ _update: function () {
+ if (this._map) {
+ this._updatePath();
+ }
+ },
+
+ _updatePath: function () {
+ this._renderer._updateCircle(this);
+ },
+
+ _empty: function () {
+ return this._radius && !this._renderer._bounds.intersects(this._pxBounds);
+ }
+});
+
+
+// @factory L.circleMarker(latlng: LatLng, options?: CircleMarker options)
+// Instantiates a circle marker object given a geographical point, and an optional options object.
+L.circleMarker = function (latlng, options) {
+ return new L.CircleMarker(latlng, options);
+};
+
+
+
+/*
+ * @class Circle
+ * @aka L.Circle
+ * @inherits CircleMarker
+ *
+ * A class for drawing circle overlays on a map. Extends `CircleMarker`.
+ *
+ * It's an approximation and starts to diverge from a real circle closer to poles (due to projection distortion).
+ *
+ * @example
+ *
+ * ```js
+ * L.circle([50.5, 30.5], {radius: 200}).addTo(map);
+ * ```
+ */
+
+L.Circle = L.CircleMarker.extend({
+
+ initialize: function (latlng, options, legacyOptions) {
+ if (typeof options === 'number') {
+ // Backwards compatibility with 0.7.x factory (latlng, radius, options?)
+ options = L.extend({}, legacyOptions, {radius: options});
+ }
+ L.setOptions(this, options);
+ this._latlng = L.latLng(latlng);
+
+ if (isNaN(this.options.radius)) { throw new Error('Circle radius cannot be NaN'); }
+
+ // @section
+ // @aka Circle options
+ // @option radius: Number; Radius of the circle, in meters.
+ this._mRadius = this.options.radius;
+ },
+
+ // @method setRadius(radius: Number): this
+ // Sets the radius of a circle. Units are in meters.
+ setRadius: function (radius) {
+ this._mRadius = radius;
+ return this.redraw();
+ },
+
+ // @method getRadius(): Number
+ // Returns the current radius of a circle. Units are in meters.
+ getRadius: function () {
+ return this._mRadius;
+ },
+
+ // @method getBounds(): LatLngBounds
+ // Returns the `LatLngBounds` of the path.
+ getBounds: function () {
+ var half = [this._radius, this._radiusY || this._radius];
+
+ return new L.LatLngBounds(
+ this._map.layerPointToLatLng(this._point.subtract(half)),
+ this._map.layerPointToLatLng(this._point.add(half)));
+ },
+
+ setStyle: L.Path.prototype.setStyle,
+
+ _project: function () {
+
+ var lng = this._latlng.lng,
+ lat = this._latlng.lat,
+ map = this._map,
+ crs = map.options.crs;
+
+ if (crs.distance === L.CRS.Earth.distance) {
+ var d = Math.PI / 180,
+ latR = (this._mRadius / L.CRS.Earth.R) / d,
+ top = map.project([lat + latR, lng]),
+ bottom = map.project([lat - latR, lng]),
+ p = top.add(bottom).divideBy(2),
+ lat2 = map.unproject(p).lat,
+ lngR = Math.acos((Math.cos(latR * d) - Math.sin(lat * d) * Math.sin(lat2 * d)) /
+ (Math.cos(lat * d) * Math.cos(lat2 * d))) / d;
+
+ if (isNaN(lngR) || lngR === 0) {
+ lngR = latR / Math.cos(Math.PI / 180 * lat); // Fallback for edge case, #2425
+ }
+
+ this._point = p.subtract(map.getPixelOrigin());
+ this._radius = isNaN(lngR) ? 0 : Math.max(Math.round(p.x - map.project([lat2, lng - lngR]).x), 1);
+ this._radiusY = Math.max(Math.round(p.y - top.y), 1);
+
+ } else {
+ var latlng2 = crs.unproject(crs.project(this._latlng).subtract([this._mRadius, 0]));
+
+ this._point = map.latLngToLayerPoint(this._latlng);
+ this._radius = this._point.x - map.latLngToLayerPoint(latlng2).x;
+ }
+
+ this._updateBounds();
+ }
+});
+
+// @factory L.circle(latlng: LatLng, options?: Circle options)
+// Instantiates a circle object given a geographical point, and an options object
+// which contains the circle radius.
+// @alternative
+// @factory L.circle(latlng: LatLng, radius: Number, options?: Circle options)
+// Obsolete way of instantiating a circle, for compatibility with 0.7.x code.
+// Do not use in new applications or plugins.
+L.circle = function (latlng, options, legacyOptions) {
+ return new L.Circle(latlng, options, legacyOptions);
+};
+
+
+
+/*
+ * @class SVG
+ * @inherits Renderer
+ * @aka L.SVG
+ *
+ * Allows vector layers to be displayed with [SVG](https://developer.mozilla.org/docs/Web/SVG).
+ * Inherits `Renderer`.
+ *
+ * Due to [technical limitations](http://caniuse.com/#search=svg), SVG is not
+ * available in all web browsers, notably Android 2.x and 3.x.
+ *
+ * Although SVG is not available on IE7 and IE8, these browsers support
+ * [VML](https://en.wikipedia.org/wiki/Vector_Markup_Language)
+ * (a now deprecated technology), and the SVG renderer will fall back to VML in
+ * this case.
+ *
+ * @example
+ *
+ * Use SVG by default for all paths in the map:
+ *
+ * ```js
+ * var map = L.map('map', {
+ * renderer: L.svg()
+ * });
+ * ```
+ *
+ * Use a SVG renderer with extra padding for specific vector geometries:
+ *
+ * ```js
+ * var map = L.map('map');
+ * var myRenderer = L.svg({ padding: 0.5 });
+ * var line = L.polyline( coordinates, { renderer: myRenderer } );
+ * var circle = L.circle( center, { renderer: myRenderer } );
+ * ```
+ */
+
+L.SVG = L.Renderer.extend({
+
+ getEvents: function () {
+ var events = L.Renderer.prototype.getEvents.call(this);
+ events.zoomstart = this._onZoomStart;
+ return events;
+ },
+
+ _initContainer: function () {
+ this._container = L.SVG.create('svg');
+
+ // makes it possible to click through svg root; we'll reset it back in individual paths
+ this._container.setAttribute('pointer-events', 'none');
+
+ this._rootGroup = L.SVG.create('g');
+ this._container.appendChild(this._rootGroup);
+ },
+
+ _onZoomStart: function () {
+ // Drag-then-pinch interactions might mess up the center and zoom.
+ // In this case, the easiest way to prevent this is re-do the renderer
+ // bounds and padding when the zooming starts.
+ this._update();
+ },
+
+ _update: function () {
+ if (this._map._animatingZoom && this._bounds) { return; }
+
+ L.Renderer.prototype._update.call(this);
+
+ var b = this._bounds,
+ size = b.getSize(),
+ container = this._container;
+
+ // set size of svg-container if changed
+ if (!this._svgSize || !this._svgSize.equals(size)) {
+ this._svgSize = size;
+ container.setAttribute('width', size.x);
+ container.setAttribute('height', size.y);
+ }
+
+ // movement: update container viewBox so that we don't have to change coordinates of individual layers
+ L.DomUtil.setPosition(container, b.min);
+ container.setAttribute('viewBox', [b.min.x, b.min.y, size.x, size.y].join(' '));
+
+ this.fire('update');
+ },
+
+ // methods below are called by vector layers implementations
+
+ _initPath: function (layer) {
+ var path = layer._path = L.SVG.create('path');
+
+ // @namespace Path
+ // @option className: String = null
+ // Custom class name set on an element. Only for SVG renderer.
+ if (layer.options.className) {
+ L.DomUtil.addClass(path, layer.options.className);
+ }
+
+ if (layer.options.interactive) {
+ L.DomUtil.addClass(path, 'leaflet-interactive');
+ }
+
+ this._updateStyle(layer);
+ this._layers[L.stamp(layer)] = layer;
+ },
+
+ _addPath: function (layer) {
+ this._rootGroup.appendChild(layer._path);
+ layer.addInteractiveTarget(layer._path);
+ },
+
+ _removePath: function (layer) {
+ L.DomUtil.remove(layer._path);
+ layer.removeInteractiveTarget(layer._path);
+ delete this._layers[L.stamp(layer)];
+ },
+
+ _updatePath: function (layer) {
+ layer._project();
+ layer._update();
+ },
+
+ _updateStyle: function (layer) {
+ var path = layer._path,
+ options = layer.options;
+
+ if (!path) { return; }
+
+ if (options.stroke) {
+ path.setAttribute('stroke', options.color);
+ path.setAttribute('stroke-opacity', options.opacity);
+ path.setAttribute('stroke-width', options.weight);
+ path.setAttribute('stroke-linecap', options.lineCap);
+ path.setAttribute('stroke-linejoin', options.lineJoin);
+
+ if (options.dashArray) {
+ path.setAttribute('stroke-dasharray', options.dashArray);
+ } else {
+ path.removeAttribute('stroke-dasharray');
+ }
+
+ if (options.dashOffset) {
+ path.setAttribute('stroke-dashoffset', options.dashOffset);
+ } else {
+ path.removeAttribute('stroke-dashoffset');
+ }
+ } else {
+ path.setAttribute('stroke', 'none');
+ }
+
+ if (options.fill) {
+ path.setAttribute('fill', options.fillColor || options.color);
+ path.setAttribute('fill-opacity', options.fillOpacity);
+ path.setAttribute('fill-rule', options.fillRule || 'evenodd');
+ } else {
+ path.setAttribute('fill', 'none');
+ }
+ },
+
+ _updatePoly: function (layer, closed) {
+ this._setPath(layer, L.SVG.pointsToPath(layer._parts, closed));
+ },
+
+ _updateCircle: function (layer) {
+ var p = layer._point,
+ r = layer._radius,
+ r2 = layer._radiusY || r,
+ arc = 'a' + r + ',' + r2 + ' 0 1,0 ';
+
+ // drawing a circle with two half-arcs
+ var d = layer._empty() ? 'M0 0' :
+ 'M' + (p.x - r) + ',' + p.y +
+ arc + (r * 2) + ',0 ' +
+ arc + (-r * 2) + ',0 ';
+
+ this._setPath(layer, d);
+ },
+
+ _setPath: function (layer, path) {
+ layer._path.setAttribute('d', path);
+ },
+
+ // SVG does not have the concept of zIndex so we resort to changing the DOM order of elements
+ _bringToFront: function (layer) {
+ L.DomUtil.toFront(layer._path);
+ },
+
+ _bringToBack: function (layer) {
+ L.DomUtil.toBack(layer._path);
+ }
+});
+
+
+// @namespace SVG; @section
+// There are several static functions which can be called without instantiating L.SVG:
+L.extend(L.SVG, {
+ // @function create(name: String): SVGElement
+ // Returns a instance of [SVGElement](https://developer.mozilla.org/docs/Web/API/SVGElement),
+ // corresponding to the class name passed. For example, using 'line' will return
+ // an instance of [SVGLineElement](https://developer.mozilla.org/docs/Web/API/SVGLineElement).
+ create: function (name) {
+ return document.createElementNS('http://www.w3.org/2000/svg', name);
+ },
+
+ // @function pointsToPath(rings: Point[], closed: Boolean): String
+ // Generates a SVG path string for multiple rings, with each ring turning
+ // into "M..L..L.." instructions
+ pointsToPath: function (rings, closed) {
+ var str = '',
+ i, j, len, len2, points, p;
+
+ for (i = 0, len = rings.length; i < len; i++) {
+ points = rings[i];
+
+ for (j = 0, len2 = points.length; j < len2; j++) {
+ p = points[j];
+ str += (j ? 'L' : 'M') + p.x + ' ' + p.y;
+ }
+
+ // closes the ring for polygons; "x" is VML syntax
+ str += closed ? (L.Browser.svg ? 'z' : 'x') : '';
+ }
+
+ // SVG complains about empty path strings
+ return str || 'M0 0';
+ }
+});
+
+// @namespace Browser; @property svg: Boolean
+// `true` when the browser supports [SVG](https://developer.mozilla.org/docs/Web/SVG).
+L.Browser.svg = !!(document.createElementNS && L.SVG.create('svg').createSVGRect);