Bug 8595 'Open super implementation' should be disabled
In the Outline view, there seems to be a new menu item 'Open super implementation', and a corresponding decoration on methods to indicate thet they have a super implementation. The UI already knows if the method has a super implementation, so it should disable the menu item when there is no super implementation to open to. Currently it just does nothing if you select a method with no super implementation. (Tested against 20020125 build)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/OpenSuperImplementationAction.java
private JavaEditor fEditor;
	/* (non-Javadoc)
	 * Class implements IObjectActionDelegate
	 */
	public static class ObjectDelegate implements IObjectActionDelegate {
		private OpenSuperImplementationAction fAction;
		public void setActivePart(IAction action, IWorkbenchPart targetPart) {
			fAction= new OpenSuperImplementationAction(targetPart.getSite());
		}
		public void run(IAction action) {
			fAction.run();
		}
		public void selectionChanged(IAction action, ISelection selection) {
			if (fAction == null)
				action.setEnabled(false);
		}
	}
	
	/**
	 * Creates a new <code>OpenSuperImplementationAction</code>.
	 * 
	 * @param site the site providing context information for this action
	 */