org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/texteditor/SelectAnnotationRulerAction.java

/*******************************************************************************
 * Copyright (c) 2000, 2008 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/


package org.eclipse.ui.texteditor;


import java.util.ResourceBundle;

import org.eclipse.swt.widgets.Menu;

import org.eclipse.jface.text.Position;
import org.eclipse.jface.text.source.Annotation;
import org.eclipse.jface.text.source.IAnnotationModel;
import org.eclipse.jface.text.source.IVerticalRulerInfo;
import org.eclipse.jface.text.source.IVerticalRulerInfoExtension;
import org.eclipse.jface.text.source.IVerticalRulerListener;
import org.eclipse.jface.text.source.VerticalRulerEvent;

/**
 * A ruler action which can select the textual range of an annotation that has a
 * visual representation in a vertical ruler.
 *
 * @since 3.0
 */
public class SelectAnnotationRulerAction extends TextEditorAction implements IVerticalRulerListener {

	/**
	 * Creates a new action for the given ruler and editor. The action configures
	 * its visual representation from the given resource bundle.
	 *
	 * @param bundle the resource bundle
	 * @param prefix a prefix to be prepended to the various resource keys
	 *   (described in <code>ResourceAction</code> constructor), or  <code>null</code> if none
	 * @param editor the editor
	 *
	 * @see ResourceAction#ResourceAction(ResourceBundle, String)
	 */
	public SelectAnnotationRulerAction(ResourceBundle bundle, String prefix, ITextEditor editor) {
		super(bundle, prefix, editor);
	}

	@Override
	public void setEditor(ITextEditor editor) {
		if (getTextEditor() != null) {
			IVerticalRulerInfo service= getTextEditor().getAdapter(IVerticalRulerInfo.class);
			if (service instanceof IVerticalRulerInfoExtension)
				((IVerticalRulerInfoExtension) service).removeVerticalRulerListener(this);
		}
		super.setEditor(editor);
		if (getTextEditor() != null) {
			IVerticalRulerInfo service= getTextEditor().getAdapter(IVerticalRulerInfo.class);
			if (service instanceof IVerticalRulerInfoExtension)
				((IVerticalRulerInfoExtension) service).addVerticalRulerListener(this);
		}
	}

	/**
	 * Returns the <code>AbstractMarkerAnnotationModel</code> of the editor's input.
	 *
	 * @return the marker annotation model or <code>null</code> if there's none
	 */
	protected IAnnotationModel getAnnotationModel() {
		IDocumentProvider provider= getTextEditor().getDocumentProvider();
		return provider.getAnnotationModel(getTextEditor().getEditorInput());
	}

	@Override
	public void annotationSelected(VerticalRulerEvent event) {
	}

	@Override
	public void annotationDefaultSelected(VerticalRulerEvent event) {
		Annotation a= event.getSelectedAnnotation();
		IAnnotationModel model= getAnnotationModel();
		Position position= model.getPosition(a);
		if (position == null)
			return;

		getTextEditor().selectAndReveal(position.offset, position.length);
	}

	@Override
	public void annotationContextMenuAboutToShow(VerticalRulerEvent event, Menu menu) {
	}
}