Bug 43134 Dragging scrollbar thumb in the threadPane initiates a drag, fix the address book part. r=putterman

mailnews/addrbook/resources/content/abDragDrop.js

@@ -81,6 +81,10 @@ function BeginDragResultTree(event)
     
 	// if the click is on the tree proper, ignore it. We only care about clicks on items.
 
+    if (event.target.localName != "treecell" &&
+        event.target.localName != "treeitem")
+        return false;
+
 	var tree = resultsTree;
 	if ( event.target == tree )
 		return(true);					// continue propagating the event
@@ -138,6 +142,10 @@ function DropOnDirectoryTree(event)
 {
 	debugDump("DropOnTree\n");
 
+    if (event.target.localName != "treecell" &&
+        event.target.localName != "treeitem")
+        return false;
+
 	var RDF = GetRDFService();
 	if (!RDF) return(false);
 

mailnews/addrbook/resources/content/abResultsTreeOverlay.xul

@@ -31,7 +31,7 @@ Rights Reserved.
 		  datasources="rdf:addressdirectory rdf:addresscard"
 		  onselect="top.ResultsPaneSelectionChange(); document.commandDispatcher.updateCommands('tree-select');"
 		  onblur="goOnEvent(this,'blur')"
-		  onclick="if ( event.detail == 2 ) top.AbEditCard();"
+		  onclick="clickResultsTree(event);"
 		  containment="http://home.netscape.com/NC-rdf#CardChild"
 		  allownegativeassertions="false"
           coalesceduplicatearcs="false"

mailnews/addrbook/resources/content/addressbook.js

@@ -277,5 +277,12 @@ function AbDeleteDirectory()
 	top.addressbook.deleteAddressBooks(dirTree.database, parentArray, dirTree.selectedItems);
 }
 
+function clickResultsTree(event)
+{
+    if (event.target.localName != "treecell" &&
+        event.target.localName != "treeitem")
+        return;
 
+	if ( event.detail == 2 ) top.AbEditCard();
+}