Add support for reprojection of vector formats when loading data. This allows

for the definition of a 'projection' option on a layer. IF this projection 
object exists, it will be used to create the format's internal/external 
projection options, making it such that any data loaded will be reprojected 
to the map's projection automatically. r=pagameba (Closes #1273, #1225, #1269) 


git-svn-id: http://svn.openlayers.org/trunk/openlayers@5828 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/GML.js

@@ -28,6 +28,13 @@ OpenLayers.Layer.GML = OpenLayers.Class(OpenLayers.Layer.Vector, {
       * {<OpenLayers.Format>} The format you want the data to be parsed with.
       */
     format: null,
+
+    /**
+     * APIProperty: formatOptions
+     * {Object} Hash of options which should be passed to the format when it is
+     * created. Must be passed in the constructor.
+     */
+    formatOptions: null, 
     
     /**
      * Constructor: OpenLayers.Layer.GML
@@ -127,8 +134,16 @@ OpenLayers.Layer.GML = OpenLayers.Class(OpenLayers.Layer.Vector, {
         if (!doc || request.fileType!="XML") {
             doc = request.responseText;
         }
-
-        var gml = this.format ? new this.format() : new OpenLayers.Format.GML();
+        
+        var options = {};
+        
+        OpenLayers.Util.extend(options, this.formatOptions);
+        if (this.map && !this.projection.equals(this.map.getProjectionObject())) {
+            options.externalProjection = this.projection;
+            options.internalProjection = this.map.getProjectionObject();
+        }    
+        
+        var gml = this.format ? new this.format(options) : new OpenLayers.Format.GML(options);
         this.addFeatures(gml.read(doc));
         this.events.triggerEvent("loadend");
     },