private void refreshLineNumberColumn(){
 	Display.getDefault().asyncExec(() ->{
 		IVerticalRuler ruler= getVerticalRuler();
 		// The following sequence mimics what happens during the setInput method.
 		// For now, this is the only known way to get the LineNumberColumn to update its visible status.
 		
 		// called at the end of org.eclipse.ui.texteditor.AbstractTextEditor.createPartControl(Composite)
if (ruler instanceof CompositeRuler) {
	updateContributedRulerColumns((CompositeRuler) ruler);
}

// called at the end of AbstractDecoratedTextEditor.doSetInput(IEditorInput) 
RulerColumnDescriptor lineNumberColumnDescriptor= RulerColumnRegistry.getDefault().getColumnDescriptor(LineNumberColumn.ID);
if (lineNumberColumnDescriptor != null) {
	IColumnSupport columnSupport= (IColumnSupport)getAdapter(IColumnSupport.class);
	columnSupport.setColumnVisible(lineNumberColumnDescriptor, isLineNumberRulerVisible() || isPrefQuickDiffAlwaysOn());
}

// force redraw of the ruler`s content.
IVerticalRuler verticalRuler = getVerticalRuler();
if (verticalRuler != null) {
	verticalRuler.update();
}
 	});
 }
 

@Override
protected void handlePreferenceStoreChanged(final PropertyChangeEvent event) {
	final LineNumberColumn c;
	super.handlePreferenceStoreChanged(event);
	if (event.getProperty().equals(PREFERENCE_COLOR_BACKGROUND)) {
		// this.fSourceViewerDecorationSupport.updateOverviewDecorations();

		this.getVerticalRuler().getControl()
				.setBackground(GamaColors.get(GamaPreferences.Modeling.EDITOR_BACKGROUND_COLOR.getValue()).color());

		final Iterator e = ((CompositeRuler) getVerticalRuler()).getDecoratorIterator();
		while (e.hasNext()) {
			final IVerticalRulerColumn column = (IVerticalRulerColumn) e.next();
			column.getControl().setBackground(
					GamaColors.get(GamaPreferences.Modeling.EDITOR_BACKGROUND_COLOR.getValue()).color());
			column.redraw();
		}
	}
}
 

public void dispose() {
    final ProvidedGroovyRepositoryStore store = RepositoryManager.getInstance()
            .getRepositoryStore(ProvidedGroovyRepositoryStore.class);
    GroovyFileStore fStore = store.getChild(GroovyFileStore.EXPRESSION_SCRIPT_NAME, true);
    if (fStore != null) {
        fStore.delete();
    }
    final IColumnSupport columSupport = (IColumnSupport) editor.getAdapter(IColumnSupport.class);
    if (columSupport != null) {
        columSupport.dispose();
    }
    final CompositeRuler verticalRuler = (CompositeRuler) editor.getAdapter(IVerticalRulerInfo.class);
    if (verticalRuler != null && verticalRuler.getControl() != null) {
        verticalRuler.getControl().dispose();
    }
    editor.dispose();
}
 

@Override
public void createPartControl(Composite composite) {
	SourceViewer sourceViewer = (SourceViewer) createTypeScriptSourceViewer(composite, new CompositeRuler(),
			null, false, fTextOrientation | SWT.H_SCROLL | SWT.V_SCROLL, createChainedPreferenceStore(null));
	setSourceViewer(this, sourceViewer);
	createNavigationActions();
	getSelectionProvider().addSelectionChangedListener(getSelectionChangedListener());
}
 

@SuppressWarnings("unchecked")
private void overrideRulerColors()
{
	IThemeableEditor editor = this.fEditor.get();

	// default to bg color of surrounding composite
	Color bg = null;
	// Use editor background color if we can
	if (editor != null)
	{
		ISourceViewer sv = editor.getISourceViewer();
		if (sv != null)
		{
			StyledText text = sv.getTextWidget();
			if (text != null)
			{
				bg = text.getBackground();
				// copy the color because for some reason it gets disposed
				bg = ThemePlugin.getDefault().getColorManager().getColor(bg.getRGB());
			}
		}

		// force the colors for all the ruler columns (specifically so we force the folding bg to match).
		CompositeRuler ruler = (CompositeRuler) editor.getIVerticalRuler();
		Iterator<IVerticalRulerColumn> iter = ruler.getDecoratorIterator();
		while (iter.hasNext())
		{
			IVerticalRulerColumn column = iter.next();
			column.getControl().setBackground(bg);
		}
	}

	if (fLineColumn != null)
	{
		fLineColumn.setBackground(bg);
	}
}
 

@Override
protected IVerticalRulerColumn createAnnotationRulerColumn(CompositeRuler ruler) {
	if (!getPreferenceStore().getBoolean(PreferenceConstants.EDITOR_ANNOTATION_ROLL_OVER))
		return super.createAnnotationRulerColumn(ruler);

	AnnotationRulerColumn column= new AnnotationRulerColumn(VERTICAL_RULER_WIDTH, getAnnotationAccess());
	column.setHover(new JavaExpandHover(ruler, getAnnotationAccess(), new IDoubleClickListener() {

		public void doubleClick(DoubleClickEvent event) {
			// for now: just invoke ruler double click action
			triggerAction(ITextEditorActionConstants.RULER_DOUBLE_CLICK);
		}

		private void triggerAction(String actionID) {
			IAction action= getAction(actionID);
			if (action != null) {
				if (action instanceof IUpdate)
					((IUpdate) action).update();
				// hack to propagate line change
				if (action instanceof ISelectionListener) {
					((ISelectionListener)action).selectionChanged(null, null);
				}
				if (action.isEnabled())
					action.run();
			}
		}

	}));

	return column;
}
 

@Override
public void createPartControl(Composite composite) {
	SourceViewer sourceViewer= (SourceViewer)createJavaSourceViewer(composite, new CompositeRuler(), null, false, fTextOrientation | SWT.H_SCROLL | SWT.V_SCROLL, createChainedPreferenceStore(null));
	setSourceViewer(this, sourceViewer);
	createNavigationActions();
	getSelectionProvider().addSelectionChangedListener(getSelectionChangedListener());
}
 

/**
 * Creates a new line number ruler column that is appropriately initialized.
 * 
 * @return the created line number column
 */
private CompositeRuler createCompositeRuler( )
{
	CompositeRuler ruler = new CompositeRuler( );

	ruler.setModel( new AnnotationModel( ) );
	return ruler;
}
 

/**
 * Creates the vertical ruler to be used by this editor.
 * 
 * @return the vertical ruler
 */
protected IVerticalRuler createVerticalRuler( )
{
	CompositeRuler ruler = createCompositeRuler( );

	ruler.addDecorator( 0, createLineNumberRulerColumn( ) );
	return ruler;
}
 

/**
 * Creates a new line number ruler column that is appropriately initialized.
 * 
 * @return the created line number column
 */
private CompositeRuler createCompositeRuler( )
{
	CompositeRuler ruler = new CompositeRuler( );

	ruler.setModel( new AnnotationModel( ) );
	return ruler;
}
 

/**
 * Creates the vertical ruler to be used by this editor.
 * 
 * @return the vertical ruler
 */
private IVerticalRuler createVerticalRuler( )
{
	IVerticalRuler ruler = createCompositeRuler( );

	if ( ruler instanceof CompositeRuler )
	{
		CompositeRuler compositeRuler = (CompositeRuler) ruler;

		compositeRuler.addDecorator( 0, createLineNumberRulerColumn( ) );
	}
	return ruler;
}
 

@Override
public Control createControl(CompositeRuler parentRuler, Composite parentControl) {
    Assert.isTrue(fDelegate != null);
    return fDelegate.createControl(parentRuler, parentControl);
}
 

public Control createControl(CompositeRuler parentRuler, Composite parentControl) {
	Control control= super.createControl(parentRuler, parentControl);
	fRevisionPainter.setParentRuler(parentRuler);
	fDiffPainter.setParentRuler(parentRuler);
	return control;
}
 

public JavaExpandHover(CompositeRuler ruler, IAnnotationAccess access, IDoubleClickListener doubleClickListener) {
	super(ruler, access, doubleClickListener);
}
 

@Override
protected SourceViewer createSourceViewer(Composite parent, int textOrientation) {
	int styles = textOrientation | SWT.H_SCROLL | SWT.V_SCROLL;
	return new LangSourceViewer(parent, new CompositeRuler(), styles);
}
 

/**
 * Creates a new hover instance.
 *
 * @param ruler
 * @param access
 * @param doubleClickListener
 */
public AnnotationExpandHover(CompositeRuler ruler, IAnnotationAccess access, IDoubleClickListener doubleClickListener) {
	fCompositeRuler= ruler;
	fAnnotationAccess= access;
	fDblClickListener= doubleClickListener;
}