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
Item last= null;
							item= null;
							children= getChildren(w);
							
							for (int j= 0; j < children.length; j++) {
								item= children[j];
								IJavaElement r= (IJavaElement) item.getData();
								
								if (r == null) {
									
									continue go2;
								}
								
									
								try {
									rng= getSourceRange(r);
									if (overlaps(rng, start, end)) {
										
										 
										
										reuseTreeItem(item, e);
										continue go2;
										
									} else if (rng.getOffset() > start) {
										
										if (last != null && deletions.contains(last)) {
											
											deletions.removeElement(last);
											reuseTreeItem(last, (Object) e);
										} else {