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
* @param item
     *           the item to compute the descendent of
     * @return the rightmost visible descendent or the item iself if it has no
     *         children
     */
    private Item rightMostVisibleDescendent(Item item) {
        Item[] children = getItems(item);
        if (getExpanded(item) && children != null && children.length > 0) {
            return rightMostVisibleDescendent(children[children.length - 1]);
        }
        return item;
    }
    
    public Item scrollDown(int x, int y) {
        Item current = getItem(x, y);
        if (current != null) {
            Item next = getNextItem(current, true);
            showItem(next == null ? current : next);
            return next;
        }
        return null;
    }
    
    public Item scrollUp(int x, int y) {
        Item current = getItem(x, y);
        if (current != null) {
            Item previous = getPreviousItem(current);
            showItem(previous == null ? current : previous);
            return previous;
        }