prevent XBL forms from being dragged, quiet dragging operations. a=ben@netscape.com

git-svn-id: svn://10.0.0.236/trunk@83460 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/xpfe/communicator/resources/content/contentAreaDD.js

@@ -33,6 +33,7 @@ var contentAreaDNDObserver = {
       // under the assumption that content areas won't contain
       // draggable XBL, we'll ignore the drag if we're dragging XBL
       // anonymous content nodes, like scrollbars, etc.
+      // XXX bogus
       if (aEvent.target != aEvent.originalTarget)
         throw Components.results.NS_ERROR_FAILURE;
 
@@ -68,7 +69,7 @@ var contentAreaDNDObserver = {
         }
       else 
         {
-          dump("Dragging DOM node: <" + draggedNode.localName + ">\n");
+          //dump("Dragging DOM node: <" + draggedNode.localName + ">\n");
           if (aEvent.altKey && findParentNode(draggedNode, 'a'))
             return false;
           switch (draggedNode.localName.toUpperCase())
@@ -115,6 +116,11 @@ var contentAreaDNDObserver = {
                     dump("Couldn't normalize selection: " + ex + "\n");
                   }
                 }
+                else {
+                  // Need to throw to indicate that the drag target should not 
+                  // allow drags.
+                  throw Components.results.NS_OK;
+                }
                 break;
             }
         }