add 'selectedFeature' member to Layer.Text so that when the user clicks a second time on the same marker, the popup disappears.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@456 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/Text.js

@@ -10,6 +10,9 @@ OpenLayers.Layer.Text.prototype =
     * @type str */
     location:null,
 
+    /** @type OpenLayers.Feature */
+    selectedFeature: null,
+
     /**
     * @constructor
     *
@@ -102,11 +105,19 @@ OpenLayers.Layer.Text.prototype =
             }
         }
     },
+    
+    /**
+     * @param {Event} evt
+     */
     markerClick: function(evt) {
+        sameMarkerClicked = (this == this.layer.selectedFeature);
+        this.layer.selectedFeature = (!sameMarkerClicked) ? this : null;
         for(var i=0; i < this.layer.map.popups.length; i++) {
             this.layer.map.removePopup(this.layer.map.popups[i]);
         }
+        if (!sameMarkerClicked) {
             this.layer.map.addPopup(this.createPopup()); 
+        }
         Event.stop(evt);
     }
 });