Bug 108102 [Viewers] Project expands in wrong working set
I am using "Show->Working Sets" in the package explorer. Some of the working sets contain the same project: Working Set-1: - Project-A - Project-B - Project-C Working Set-2: - Project-B - Project-C - Project-D If I now double-click "Working Set-1.Project-B" "Project-B" in working set "Working Set-2" will be expanded. If the working set "Working Set-2" itself is not expanded it will seem as if nothing happens, but after expanding "Working Set-2" one can see the changed state of the project. Double-clicking "Working Set-2.Project-B" works as expected.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
if (elementOrPath instanceof TreePath) {
			return ((TreePath)elementOrPath).getLastSegment();
		}
		return elementOrPath;
	}
    /**
	 * This method takes a tree path or an element. If the argument is not a
	 * tree path, returns the parent of the given element or <code>null</code>
	 * if the parent is not known. If the argument is a tree path with more than
	 * one segment, returns its parent tree path, otherwise returns
	 * <code>null</code>.
	 * 
	 * @param elementOrTreePath
	 * @return the parent element, or parent path, or <code>null</code>
	 * 
	 * @since 3.2
	 */ 
    protected Object getParentElement(Object elementOrTreePath) {
    	if(elementOrTreePath instanceof TreePath) {
    		TreePath treePath = (TreePath)elementOrTreePath;
    		if(treePath.getSegmentCount() <= 1) {
    			return null;
    		}
			return (treePath).getParentPath();
    	}
        IContentProvider cp = getContentProvider();
        if (cp instanceof ITreePathContentProvider) {
			ITreePathContentProvider tpcp = (ITreePathContentProvider) cp;
			TreePath[] paths = tpcp.getParents(elementOrTreePath);
			if (paths.length > 0) {