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mark thread tree as one that doesn't allow drops between rows. bug# 47105
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@ -35,7 +35,7 @@
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<tree datasources="rdf:null"
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id="folderTree" class="mail-folders"
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onselect="top.FolderPaneSelectionChange(); document.commandDispatcher.updateCommands('tree-select');"
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onblur="goOnEvent(this,'blur')"
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onblur="goOnEvent(this,'blur')" dd-nodropbetweenrows="true"
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ondragover="return DragOverTree(event);"
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ondraggesture="return BeginDragFolderTree(event);"
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ondragdrop="return DropOnFolderTree(event);"
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@ -48,13 +48,14 @@ function GetRDFService()
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function DragOverTree(event)
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{
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if (event.target.localName != "treecell" &&
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event.target.localName != "treeitem")
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return false;
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if (event.target.localName != "treecell" &&
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event.target.localName != "treeitem") {
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event.preventBubble();
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return;
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}
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var validFlavor = false;
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var dragSession = null;
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var retVal = true;
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var dragService = GetDragService();
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if ( !dragService ) return(false);
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@ -65,17 +66,16 @@ function DragOverTree(event)
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if ( dragSession.isDataFlavorSupported("text/nsmessage") ) validFlavor = true;
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//XXX other flavors here...
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// touch the attribute on the rowgroup to trigger the repaint with the drop feedback.
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// touch the attribute on the treeItem to trigger the repaint with the drop feedback
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// (recall that it is two levels above the target, which is a treeCell).
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if ( validFlavor )
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{
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//XXX this is really slow and likes to refresh N times per second.
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var rowGroup = event.target.parentNode.parentNode;
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rowGroup.setAttribute ( "dd-triggerrepaint", 0 );
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event.target.parentNode.parentNode.setAttribute ( "dd-triggerrepaint", 0 );
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dragSession.canDrop = true;
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// necessary??
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retVal = false; // do not propagate message
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event.preventBubble(); // do not propagate message
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}
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return(retVal);
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}
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function BeginDragFolderTree(event)
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