Merge pull request #1967 from fredj/tileUrlFunction-this

Don't use 'this' keyword in tileUrlFunction

examples/wmts.js

@@ -1,3 +1,4 @@
+goog.require('ol.Attribution');
 goog.require('ol.Map');
 goog.require('ol.View2D');
 goog.require('ol.extent');
@@ -8,17 +9,23 @@ goog.require('ol.source.WMTS');
 goog.require('ol.tilegrid.WMTS');
 
 
-var projection = ol.proj.get('EPSG:900913');
+var projection = ol.proj.get('EPSG:3857');
 var projectionExtent = projection.getExtent();
 var size = ol.extent.getWidth(projectionExtent) / 256;
-var resolutions = new Array(18);
-var matrixIds = new Array(18);
-for (var z = 0; z < 18; ++z) {
+var resolutions = new Array(14);
+var matrixIds = new Array(14);
+for (var z = 0; z < 14; ++z) {
   // generate resolutions and matrixIds arrays for this WMTS
   resolutions[z] = size / Math.pow(2, z);
   matrixIds[z] = z;
 }
 
+var attribution = new ol.Attribution({
+  html: 'Tiles &copy; <a href="http://services.arcgisonline.com/arcgis/rest/' +
+      'services/Demographics/USA_Population_Density/MapServer/">ArcGIS</a>'
+});
+
+
 var map = new ol.Map({
   layers: [
     new ol.layer.Tile({
@@ -28,25 +35,26 @@ var map = new ol.Map({
     new ol.layer.Tile({
       opacity: 0.7,
       source: new ol.source.WMTS({
-        url: 'http://demo-apollo.geospatial.intergraph.com/erdas-iws/ogc/wmts/',
-        layer: 'sampleiws_images_geodetic_worldgeodemo.ecw',
-        matrixSet: 'ogc:1.0:googlemapscompatible',
-        format: 'image/jpeg',
+        attributions: [attribution],
+        url: 'http://services.arcgisonline.com/arcgis/rest/' +
+            'services/Demographics/USA_Population_Density/MapServer/WMTS/',
+        layer: '0',
+        matrixSet: 'EPSG:3857',
+        format: 'image/png',
         projection: projection,
         tileGrid: new ol.tilegrid.WMTS({
           origin: ol.extent.getTopLeft(projectionExtent),
           resolutions: resolutions,
           matrixIds: matrixIds
         }),
-        extent: [-20037508.34, -20037508.34, 20037508.34, 20037508.34],
+        extent: projectionExtent,
         style: 'default'
       })
     })
   ],
   target: 'map',
   view: new ol.View2D({
-    center: [0, 0],
-    zoom: 0,
-    maxResolution: resolutions[1]
+    center: [-11158582, 4813697],
+    zoom: 4
   })
 });

src/ol/source/wmtssource.js

@@ -76,6 +76,8 @@ ol.source.WMTS = function(options) {
     });
   }
 
+  var dimensions = this.dimensions_;
+
   /**
    * @param {string} template Template.
    * @return {ol.TileUrlFunctionType} Tile URL function.
@@ -94,7 +96,6 @@ ol.source.WMTS = function(options) {
 
     return (
         /**
-         * @this {ol.source.WMTS}
          * @param {ol.TileCoord} tileCoord Tile coordinate.
          * @param {number} pixelRatio Pixel ratio.
          * @param {ol.proj.Projection} projection Projection.
@@ -109,7 +110,7 @@ ol.source.WMTS = function(options) {
               'TileCol': tileCoord.x,
               'TileRow': tileCoord.y
             };
-            goog.object.extend(localContext, this.dimensions_);
+            goog.object.extend(localContext, dimensions);
             var url = template;
             if (requestEncoding == ol.source.WMTSRequestEncoding.KVP) {
               url = goog.uri.utils.appendParamsFromMap(url, localContext);
@@ -143,7 +144,6 @@ ol.source.WMTS = function(options) {
        * @return {ol.TileCoord} Tile coordinate.
        */
       function(tileCoord, projection, opt_tileCoord) {
-        var tileGrid = this.getTileGrid();
         goog.asserts.assert(!goog.isNull(tileGrid));
         if (tileGrid.getResolutions().length <= tileCoord.z) {
           return null;