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
*/
		public IStatus run(IProgressMonitor progressMonitor) {
			
			fProgressMonitor= progressMonitor;
			
			if (isCanceled())
				return Status.CANCEL_STATUS;
			
			ITextViewer textViewer= getViewer(); 
			if (textViewer == null)
				return Status.CANCEL_STATUS;
			
			IDocument document= textViewer.getDocument();
			if (document == null)
				return Status.CANCEL_STATUS;
			
			IDocumentProvider documentProvider= getDocumentProvider();
			if (documentProvider == null)
				return Status.CANCEL_STATUS;
		
			IAnnotationModel annotationModel= documentProvider.getAnnotationModel(getEditorInput());
			if (annotationModel == null)
				return Status.CANCEL_STATUS;
			
			
			int length= fPositions.length;
			Map annotationMap= new HashMap(length);
			for (int i= 0; i < length; i++) {
				
				if (isCanceled())