Tiles should not load data outside maxExtent unless the

'displayOutsideMaxExtent' option on the layer is set to true. Add
tests, docs, and code.


git-svn-id: http://svn.openlayers.org/trunk/openlayers@1531 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Tile/Image.js

@@ -49,13 +49,17 @@ OpenLayers.Tile.Image.prototype =
         }
 
         this.imgDiv.style.display = "none";
-        if (this.layer.alpha) {
-            OpenLayers.Util.modifyAlphaImageDiv(this.imgDiv,
-                    null, this.position, this.size, this.url);
-        } else {
-            this.imgDiv.src = this.url;
-            OpenLayers.Util.modifyDOMElement(this.imgDiv,
-                    null, this.position, this.size) ;
+        if (this.layer.displayOutsideMaxExtent || (this.layer.maxExtent && 
+            (this.bounds.intersectsBounds(this.layer.maxExtent,false))
+            )) { 
+            if (this.layer.alpha) {
+                OpenLayers.Util.modifyAlphaImageDiv(this.imgDiv,
+                        null, this.position, this.size, this.url);
+            } else {
+                this.imgDiv.src = this.url;
+                OpenLayers.Util.modifyDOMElement(this.imgDiv,
+                        null, this.position, this.size) ;
+            }
         }
     },