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
deactivate();
				return;
			}
		
			IRegion region= getCurrentTextRegion(viewer);
			if (region == null || region.getLength() == 0) {
				repairRepresentation();
				return;
			}
			
			highlightRegion(viewer, region);
			activateCursor(viewer);												
		}
		/*
		 * @see org.eclipse.swt.events.FocusListener#focusGained(org.eclipse.swt.events.FocusEvent)
		 */
		public void focusGained(FocusEvent e) {}
		/*
		 * @see org.eclipse.swt.events.FocusListener#focusLost(org.eclipse.swt.events.FocusEvent)
		 */
		public void focusLost(FocusEvent event) {
			deactivate();
		}
		/*
		 * @see org.eclipse.jface.text.IDocumentListener#documentAboutToBeChanged(org.eclipse.jface.text.DocumentEvent)
		 */
		public void documentAboutToBeChanged(DocumentEvent event) {
			if (fActive && fActiveRegion != null) {
				fRememberedPosition= new Position(fActiveRegion.getOffset(), fActiveRegion.getLength());
				try {