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
fEditorSelectionChangedListener= new EditorSelectionChangedListener();
		fEditorSelectionChangedListener.install(getSelectionProvider());
		
		if (isBrowserLikeLinks())
			enableBrowserLikeLinks();
		if (PreferenceConstants.getPreferenceStore().getBoolean(PreferenceConstants.EDITOR_DISABLE_OVERWRITE_MODE))
			enableOverwriteMode(false);
		if (fMarkOccurrenceAnnotations)
			installOccurrencesFinder();
		
		if (isSemanticHighlightingEnabled())
			installSemanticHighlighting();
		getEditorSite().getShell().addShellListener(fActivationListener);
	}
	
	protected void configureSourceViewerDecorationSupport(SourceViewerDecorationSupport support) {
		
		support.setCharacterPairMatcher(fBracketMatcher);
		support.setMatchingCharacterPainterPreferenceKeys(MATCHING_BRACKETS, MATCHING_BRACKETS_COLOR);
		
		super.configureSourceViewerDecorationSupport(support);
	}
	
	/*
	 * @see org.eclipse.ui.texteditor.AbstractTextEditor#gotoMarker(org.eclipse.core.resources.IMarker)
	 */
	public void gotoMarker(IMarker marker) {
		fLastMarkerTarget= marker;
		if (!fIsUpdatingAnnotationViews) {