From 33897d30b32b1323d8d4a3053b2a8a13cea5e5d5 Mon Sep 17 00:00:00 2001
From: Tom MacWright <tom@macwright.org>
Date: Tue, 11 Jun 2013 12:33:50 -0700
Subject: [PATCH] Scope map variable.

---
 app/assets/javascripts/application.js   |  4 +---
 app/assets/javascripts/index.js         | 25 +++++++++++++++----------
 app/assets/javascripts/leaflet.share.js |  8 +++++---
 3 files changed, 21 insertions(+), 16 deletions(-)

diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
index c9eddfb9c..247df1b83 100644
--- a/app/assets/javascripts/application.js
+++ b/app/assets/javascripts/application.js
@@ -129,9 +129,7 @@ function makeShortCode(map) {
     }
     for (i = 0; i < ((zoom + 8) % 3); ++i) str += "-";
 
-    /*
-     * Called to interlace the bits in x and y, making a Morton code.
-     */
+    // Called to interlace the bits in x and y, making a Morton code.
     function interlace(x, y) {
         x = (x | (x << 8)) & 0x00ff00ff;
         x = (x | (x << 4)) & 0x0f0f0f0f;
diff --git a/app/assets/javascripts/index.js b/app/assets/javascripts/index.js
index 40fe11761..10f9f86f0 100644
--- a/app/assets/javascripts/index.js
+++ b/app/assets/javascripts/index.js
@@ -15,7 +15,7 @@ $(document).ready(function () {
   var marker;
   var params = OSM.mapParams();
 
-  map = L.map("map", {
+  var map = L.map("map", {
     zoomControl: false,
     layerControl: false
   });
@@ -84,7 +84,7 @@ $(document).ready(function () {
 
   L.control.scale().addTo(map);
 
-  map.on("moveend layeradd layerremove", updateLocation);
+  map.on('moveend layeradd layerremove', updateLocation);
 
   if (!params.object_zoom) {
     if (params.bbox) {
@@ -154,17 +154,22 @@ $(document).ready(function () {
     marker = L.marker(centre, {icon: getUserIcon()}).addTo(map);
   });
 
-  function updateLocation() {
+  // generate a cookie-safe string of map state
+  function cookieContent(map) {
     var center = map.getCenter().wrap();
-    var zoom = map.getZoom();
-    var layers = getMapLayers();
-    var extents = map.getBounds().wrap();
+    return [center.lng, center.lat, map.getZoom(), getMapLayers(map)].join('|');
+  }
 
-    updatelinks(center, zoom, layers, extents, params.object);
+  function updateLocation() {
+    updatelinks(map.getCenter().wrap(),
+        map.getZoom(),
+        getMapLayers(this),
+        map.getBounds().wrap(),
+        params.object);
 
     var expiry = new Date();
     expiry.setYear(expiry.getFullYear() + 10);
-    $.cookie("_osm_location", [center.lng, center.lat, zoom, layers].join("|"), {expires: expiry});
+    $.cookie("_osm_location", cookieContent(map), { expires: expiry });
   }
 
   function remoteEditHandler() {
@@ -229,8 +234,8 @@ function getMapBaseLayer() {
   }
 }
 
-function getMapLayers() {
-  var layerConfig = "";
+function getMapLayers(map) {
+  var layerConfig = '';
   for (var i in map._layers) { // TODO: map.eachLayer
     var layer = map._layers[i];
     if (layer.options && layer.options.code) {
diff --git a/app/assets/javascripts/leaflet.share.js b/app/assets/javascripts/leaflet.share.js
index f085bc0e6..d43f99b1d 100644
--- a/app/assets/javascripts/leaflet.share.js
+++ b/app/assets/javascripts/leaflet.share.js
@@ -18,6 +18,8 @@ L.Control.Share = L.Control.extend({
 
         this._uiPane = this.options.uiPane;
 
+        this._map = map;
+
         var h2 = L.DomUtil.create('h2', '', this._uiPane);
         h2.innerHTML = I18n.t('javascripts.share.title');
 
@@ -35,9 +37,9 @@ L.Control.Share = L.Control.extend({
     },
 
     _update: function (e) {
-        var center = map.getCenter().wrap();
-        var layers = getMapLayers();
-        this._linkInput.value = this.options.getUrl(map);
+        var center = this._map.getCenter().wrap();
+        var layers = getMapLayers(this._map);
+        this._linkInput.value = this.options.getUrl(this._map);
     },
 
     _toggle: function() {
-- 
2.43.2