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
int offset= sourceViewer.getVisibleRegion().getOffset();
			modelCaret= offset + styledText.getCaretOffset();
		}
				
		IJavaElement element= getElementAt(modelCaret, false);
		ISourceReference reference= getSourceReference(element, modelCaret);
		if (reference != null) {
			fOutlinePage.removeSelectionChangedListener(fSelectionChangedListener);
			fOutlinePage.select(reference);
			fOutlinePage.addSelectionChangedListener(fSelectionChangedListener);
		}
	}
	
	private ISourceReference getSourceReference(IJavaElement element, int offset) {
		
		if ( !(element instanceof ISourceReference))
			return null;
		
		if (element.getElementType() == IJavaElement.IMPORT_DECLARATION) {
			
			IImportDeclaration declaration= (IImportDeclaration) element;
			IImportContainer container= (IImportContainer) declaration.getParent();
			ISourceRange srcRange= null;
			
			try {
				srcRange= container.getSourceRange();
			} catch (JavaModelException e) {
			}
			
			if (srcRange != null && srcRange.getOffset() == offset)