Bug 17292 Inconsistent Undo behaviour for Cut/Copy/Paste in outline
Build 20020521 (freeze 1) 1) Open a java editor on some class 2) In the content outline, select a method and do Ctrl+X to cut 3) Notice in the menus, Edit->Undo and Refactor->Undo are disabled 4) Now select the type node in the content outline, and Ctrl+V to paste 5) Still, neither Undo action is enabled 6) Now click inside the editor area to give it focus. 7) Now "Edit->Undo" is possible. So, the problems are: 1) Undo is not consistent, it's available for Paste but not Cut. 2) Even when undo is possible, it only becomes enabled when the editor is activated.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaOutlinePage.java
private MemberFilterActionGroup fMemberFilterActionGroup;
		
	private ListenerList fSelectionChangedListeners= new ListenerList();
	private Hashtable fActions= new Hashtable();
	
	private TogglePresentationAction fTogglePresentation;
	private ToggleTextHoverAction fToggleTextHover;
	private GotoErrorAction fPreviousError;
	private GotoErrorAction fNextError;
	private TextOperationAction fShowJavadoc;
	
	private OpenAction fOpenAction;
	private CompositeActionGroup fActionGroups;
	private CCPActionGroup fCCPActionGroup;
	
	public JavaOutlinePage(String contextMenuID, JavaEditor editor) {
		super();
		
		Assert.isNotNull(editor);
		
		fContextMenuID= contextMenuID;
		fEditor= editor;
		
		fTogglePresentation= new TogglePresentationAction();
		fToggleTextHover= new ToggleTextHoverAction();
		fPreviousError= new GotoErrorAction("PreviousError.", false); 
		fPreviousError.setImageDescriptor(JavaPluginImages.DESC_TOOL_GOTO_PREV_ERROR);
		fNextError= new GotoErrorAction("NextError.", true); 
		fNextError.setImageDescriptor(JavaPluginImages.DESC_TOOL_GOTO_NEXT_ERROR);