Adding a BBOX strategy. This triggers requests for data within a bounding box. When the map bounds invalidate previous data bounds, another request is issued. Reads are triggered with a spatial filter, and protocols that understand how to deal with filters may serialize the filter to request a subset of the data collection. The HTTP protocol understands one filter - the bbox filter. So the BBOX strategy can be used in conjunction with the HTTP protocol to request data via http in a bounding box. Thanks for the collaboration and tests Eric. r=elemoine,crschmidt (#1731)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@8000 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

tests/Protocol/HTTP.html

@@ -104,6 +104,31 @@
         var resp = protocol.read(readOptions);
     }
 
+    function test_read_bbox(t) {
+        t.plan(1);
+        var protocol = new OpenLayers.Protocol.HTTP();
+
+        // fake XHR request object
+        var request = {'status': 200};
+
+        var _get = OpenLayers.Request.GET;
+
+        var bounds = new OpenLayers.Bounds(1, 2, 3, 4);
+        var filter = new OpenLayers.Filter.Spatial({
+            type: OpenLayers.Filter.Spatial.BBOX,
+            value: bounds,
+            projection: "foo"
+        });
+        
+        OpenLayers.Request.GET = function(options) {
+            t.eq(options.params['bbox'].toString(), bounds.toArray().toString(),
+                'GET called with bbox filter in params');
+            return request;
+        };
+
+        var resp = protocol.read({filter: filter});
+    }
+
     function test_parseFeatures(t) {
         t.plan(5);