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 ElementChangedListener fListener;
				
				protected boolean matches(IJavaElement element) {
					if (element.getElementType() == IJavaElement.METHOD) {
						String name= element.getElementName();
						return (name != null && name.indexOf('<') >= 0);
					}
					return false;
				}
				
				protected IJavaElement[] filter(IJavaElement[] children) {
					boolean initializers= false;
					for (int i= 0; i < children.length; i++) {
						if (matches(children[i])) {
							initializers= true;
							break;
						}
					}
							
					if (!initializers)