Bug 40785 [plan item] Overview ruler improvements
- navigation from ruler to editor - hovering over header area shows number of errors/warning (header annotations in general)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
sourceViewer.setTextHover(configuration.getTextHover(sourceViewer, t), t);
		}
	}
	
	/*
	 * @see org.eclipse.jdt.internal.ui.viewsupport.IViewPartInputProvider#getViewPartInput()
	 */
	public Object getViewPartInput() {
		return getEditorInput().getAdapter(IJavaElement.class);
	}
	
	/*
	 * @see org.eclipse.ui.texteditor.AbstractTextEditor#doSetSelection(ISelection)
	 */
	protected void doSetSelection(ISelection selection) {
		super.doSetSelection(selection);
		synchronizeOutlinePageSelection();
	}
	/*
	 * @see org.eclipse.ui.IWorkbenchPart#createPartControl(org.eclipse.swt.widgets.Composite)
	 */
	public void createPartControl(Composite parent) {
		super.createPartControl(parent);
		
		Preferences preferences= JavaCore.getPlugin().getPluginPreferences();
		preferences.addPropertyChangeListener(fPropertyChangeListener);			
		
		IInformationControlCreator informationControlCreator= new IInformationControlCreator() {
			public IInformationControl createInformationControl(Shell shell) {
				boolean cutDown= false;