add support for the ol:tileSize layer property in WMC, p=fvanderbiest,r=me (Closes #2740)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@10491 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Format/Context.js

@@ -128,6 +128,11 @@ OpenLayers.Format.Context = OpenLayers.Class({
             opacity: layerContext.opacity,
             displayInLayerSwitcher: layerContext.displayInLayerSwitcher,
             singleTile: layerContext.singleTile,
+            tileSize: (layerContext.tileSize) ? 
+                new OpenLayers.Size(
+                    layerContext.tileSize.width, 
+                    layerContext.tileSize.height
+                ) : undefined,
             minScale: layerContext.minScale || layerContext.maxScaleDenominator,
             maxScale: layerContext.maxScale || layerContext.minScaleDenominator
         };

lib/OpenLayers/Format/WMC.js

@@ -75,6 +75,8 @@ OpenLayers.Format.WMC = OpenLayers.Class(OpenLayers.Format.Context, {
             opacity: layer.opacity,
             displayInLayerSwitcher: layer.displayInLayerSwitcher,
             singleTile: layer.singleTile,
+            tileSize: (layer.singleTile || !layer.tileSize) ? 
+                undefined : {width: layer.tileSize.w, height: layer.tileSize.h},
             minScale : (layer.options.resolutions ||
                         layer.options.scales || 
                         layer.options.maxResolution || 

lib/OpenLayers/Format/WMC/v1.js

@@ -231,6 +231,14 @@ OpenLayers.Format.WMC.v1 = OpenLayers.Class(OpenLayers.Format.XML, {
         layerContext.singleTile = (this.getChildValue(node) == "true");
     },
 
+    /**
+     * Method: read_ol_tileSize
+     */
+    read_ol_tileSize: function(layerContext, node) {
+        var obj = {"width": node.getAttribute("width"), "height": node.getAttribute("height")};
+        layerContext.tileSize = obj;
+    },
+    
     /**
      * Method: read_ol_isBaseLayer
      */
@@ -618,6 +626,14 @@ OpenLayers.Format.WMC.v1 = OpenLayers.Class(OpenLayers.Format.XML, {
         });
         node.appendChild(maxExtent);
         
+        if (context.tileSize && !context.singleTile) {
+            var size = this.createElementNS(
+                this.namespaces.ol, "ol:tileSize"
+            );
+            this.setAttributes(size, context.tileSize);
+            node.appendChild(size);
+        }
+        
         var properties = [
             "transparent", "numZoomLevels", "units", "isBaseLayer",
             "opacity", "displayInLayerSwitcher", "singleTile"