Bug 33389 Read-Only files: Quick fix enabled and gets checkmark!
RC1 1. set a file to ready only. 2. Open the file an set the cursor inside 3. Open the 'Edit' menu. Note that 'Quick fix' is enabled, but 'Content assist' is not 4. Choose 'Quick fix' 5. Open the context menu: Quick fix got a checkmark!
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
}
		}
		super.handlePreferencePropertyChanged(event);
	}
	
	/*
	 * @see org.eclipse.jdt.internal.ui.javaeditor.JavaEditor#createJavaSourceViewer(org.eclipse.swt.widgets.Composite, org.eclipse.jface.text.source.IVerticalRuler, org.eclipse.jface.text.source.IOverviewRuler, boolean, int)
	 */
	protected ISourceViewer createJavaSourceViewer(Composite parent, IVerticalRuler verticalRuler, IOverviewRuler overviewRuler, boolean isOverviewRulerVisible, int styles) {
		return new AdaptedSourceViewer(parent, verticalRuler, overviewRuler, isOverviewRulerVisible, styles);
	}
	
	public void synchronizeOutlinePageSelection() {
		
		if (isEditingScriptRunning())
			return;
		
		ISourceViewer sourceViewer= getSourceViewer();
		if (sourceViewer == null || fOutlinePage == null)
			return;
			
		StyledText styledText= sourceViewer.getTextWidget();
		if (styledText == null)
			return;
		
		int modelCaret= 0;
		if (sourceViewer instanceof ITextViewerExtension3) {
			ITextViewerExtension3 extension= (ITextViewerExtension3) sourceViewer;
			modelCaret= extension.widgetOffset2ModelOffset(styledText.getCaretOffset());
		} else {