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/JavaEditor.java
FocusListener, PaintListener, IPropertyChangeListener, IDocumentListener, ITextInputListener, ITextPresentationListener {
		
		private boolean fActive;
		
		private IRegion fActiveRegion;
		
		private Position fRememberedPosition;
		
		private Cursor fCursor;
		
		
		private Color fColor;
		
		private int fKeyModifierMask;
		
		public void deactivate() {
			deactivate(false);
		}
		public void deactivate(boolean redrawAll) {
			if (!fActive)
				return;
			repairRepresentation(redrawAll);			
			fActive= false;
		}
		public void install() {
			ISourceViewer sourceViewer= getSourceViewer();
			if (sourceViewer == null)
				return;