Bug 66923 [typing]Can delete word (Ctrl-Backspace) on read only file
When you open read-only java file, all editing functions are disabled except deleting with Ctrl-Backspace and Ctrl-Del, then it is imposible to save this file. On simple text file it works ok - it blocks all edditing functions (including Ctrl-Backspace). I am using build 200406111814
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
revealStartOffset= startOffset;
					endOffset= fEndOffset.getOffset();
					revealEndOffset= endOffset;
				}
				
				if (startOffset == -1) {
					startOffset= endOffset; 
					revealStartOffset= revealEndOffset;
				}
				
				if (endOffset == -1) {
					endOffset= startOffset; 
					revealEndOffset= revealStartOffset;
				}
				
				IJavaElement element;
				if (endOffset == -1) {
					 
					element= fEndOffset.getElement();
					if (element == null)
						element= fStartOffset.getElement();
					if (element != null)
						setSelection(element);
					return;
				}
							
				if (isValidSelection(revealStartOffset, revealEndOffset - revealStartOffset) && isValidSelection(startOffset, endOffset - startOffset))
					selectAndReveal(startOffset, endOffset - startOffset, revealStartOffset, revealEndOffset - revealStartOffset);
			} finally {
				fStartOffset.clear();