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
for (int i = 0; i < items.length; i++) {
            Item item = items[i];
            Object data = item.getData();
            TreePath childPath = data==null ? null: currentPath.createChildPath(data);
            if (data != null && childPath!=null) {
                
                
                boolean expanded = expandedTreePaths.remove(childPath) != null;
                if (expanded != getExpanded(item)) {
                    if (expanded) {
                        createChildren(item);
                    }
                    setExpanded(item, expanded);
                }
            }
            internalSetExpandedTreePaths(expandedTreePaths, item, childPath);
        }
	}
    /**
     * Return whether the tree node representing the given element or path can be
     * expanded. Clients should query expandablity by path if the viewer's
     * content provider is an {@link ITreePathContentProvider}.
     * <p>
     * The default implementation of this framework method calls <code>hasChildren</code>
     * on this viewer's content provider. It may be overridden if necessary.
     * </p>
     * 
     * @param elementOrTreePath
     *           the element or path
     * @return <code>true</code> if the tree node representing the given