Bug 94456 [Undo] - Resource Navigator not showing workspace undo actions
The Resource Navigator is not showing the workspace undo actions. Package Explorer is correctly working. Need to look at the difference in the way the action handlers are set up.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/navigator/ResourceNavigator.java
}
    /**	
     * @see ViewPart#saveState
     */
    public void saveState(IMemento memento) {
        TreeViewer viewer = getTreeViewer();
        if (viewer == null) {
            if (this.memento != null) 
                memento.putMemento(this.memento);
            return;
        }
        
        memento.putInteger(TAG_SORTER, getSorter().getCriteria());
        
        String filters[] = getPatternFilter().getPatterns();
        List selectedFilters = Arrays.asList(filters);
        List allFilters = FiltersContentProvider.getDefinedFilters();
        IMemento filtersMem = memento.createChild(TAG_FILTERS);
        for (Iterator iter = allFilters.iterator(); iter.hasNext();) {
            String element = (String) iter.next();
            IMemento child = filtersMem.createChild(TAG_FILTER);
            child.putString(TAG_ELEMENT, element);
            child.putString(TAG_IS_ENABLED, String.valueOf(selectedFilters
                    .contains(element)));
        }
        if (frameList.getCurrentIndex() > 0) {
            
            TreeFrame currentFrame = (TreeFrame) frameList.getCurrentFrame();
            IMemento frameMemento = memento.createChild(TAG_CURRENT_FRAME);
            currentFrame.saveState(frameMemento);