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
super.createPartControl(parent);
		ProjectionViewer projectionViewer= (ProjectionViewer) getSourceViewer();
		
		fProjectionSupport= new ProjectionSupport(projectionViewer, getAnnotationAccess(), getSharedColors());
		fProjectionSupport.addSummarizableAnnotationType("org.eclipse.ui.workbench.texteditor.error"); 
		fProjectionSupport.addSummarizableAnnotationType("org.eclipse.ui.workbench.texteditor.warning"); 
		fProjectionSupport.setHoverControlCreator(new IInformationControlCreator() {
			public IInformationControl createInformationControl(Shell shell) {
				return new CustomSourceInformationControl(shell, IDocument.DEFAULT_CONTENT_TYPE);
			}
		});
		fProjectionSupport.install();
		
		fProjectionModelUpdater= JavaPlugin.getDefault().getFoldingStructureProviderRegistry().getCurrentFoldingProvider();
		if (fProjectionModelUpdater != null)
			fProjectionModelUpdater.install(this, projectionViewer);
				
		if (isFoldingEnabled())
			projectionViewer.doOperation(ProjectionViewer.TOGGLE);
		
		IInformationControlCreator informationControlCreator= new IInformationControlCreator() {
			public IInformationControl createInformationControl(Shell shell) {
				boolean cutDown= false;
				int style= cutDown ? SWT.NONE : (SWT.V_SCROLL | SWT.H_SCROLL);
				return new DefaultInformationControl(shell, SWT.RESIZE, style, new HTMLTextPresenter(cutDown));
			}
		};
		fInformationPresenter= new InformationPresenter(informationControlCreator);
		fInformationPresenter.setSizeConstraints(60, 10, true, true);		
		fInformationPresenter.install(getSourceViewer());