Improved clone method for Layer.XYZ; gave Layer.OSM its own clone method. Thanks aratcliffe for bringing this up. r=tschaub (closes #2738)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@10507 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/XYZ.js

@@ -65,7 +65,7 @@ OpenLayers.Layer.XYZ = OpenLayers.Class(OpenLayers.Layer.Grid, {
      * obj - {Object} Is this ever used?
      * 
      * Returns:
-     * {<OpenLayers.Layer.Grid>} An exact clone of this OpenLayers.Layer.Grid
+     * {<OpenLayers.Layer.XYZ>} An exact clone of this OpenLayers.Layer.XYZ
      */
     clone: function (obj) {
         
@@ -76,15 +76,7 @@ OpenLayers.Layer.XYZ = OpenLayers.Class(OpenLayers.Layer.Grid, {
         }
 
         //get all additions from superclasses
-        obj = OpenLayers.Layer.HTTPRequest.prototype.clone.apply(this, [obj]);
-
-        // copy/set any non-init, non-simple values here
-        if (this.tileSize != null) {
-            obj.tileSize = this.tileSize.clone();
-        }
-        
-        // we do not want to copy reference to grid, so we make a new array
-        obj.grid = [];
+        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);
 
         return obj;
     },    
@@ -174,5 +166,13 @@ OpenLayers.Layer.OSM = OpenLayers.Class(OpenLayers.Layer.XYZ, {
      attribution: "Data CC-By-SA by <a href='http://openstreetmap.org/'>OpenStreetMap</a>",
      sphericalMercator: true,
      url: 'http://tile.openstreetmap.org/${z}/${x}/${y}.png',
+     clone: function(obj) {
+         if (obj == null) {
+             obj = new OpenLayers.Layer.OSM(
+                 this.name, this.url, this.getOptions());
+         }
+         obj = OpenLayers.Layer.XYZ.prototype.clone.apply(this, [obj]);
+         return obj;
+     },
      CLASS_NAME: "OpenLayers.Layer.OSM"
 });

tests/Layer/XYZ.html

@@ -173,6 +173,19 @@
         map.destroy();
     }
     
+    function test_clone(t) {
+        t.plan(2);
+        
+        var clone;
+        
+        layer = new OpenLayers.Layer.XYZ(name, url, options);
+        clone = layer.clone();
+        t.ok(clone instanceof OpenLayers.Layer.XYZ, "clone is a Layer.XYZ instance");
+
+        layer = new OpenLayers.Layer.OSM();
+        clone = layer.clone();
+        t.ok(clone instanceof OpenLayers.Layer.OSM, "clone is a Layer.OSM instance");
+    }
 
   </script>
 </head>