Package org.eclipse.ui.texteditor

Source Code of org.eclipse.ui.texteditor.SelectAnnotationRulerAction

/*******************************************************************************
* Copyright (c) 2000, 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* 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);
  }

  /*
   * @see org.eclipse.ui.texteditor.TextEditorAction#setEditor(org.eclipse.ui.texteditor.ITextEditor)
   */
  public void setEditor(ITextEditor editor) {
    if (getTextEditor() != null) {
      IVerticalRulerInfo service= (IVerticalRulerInfo) getTextEditor().getAdapter(IVerticalRulerInfo.class);
      if (service instanceof IVerticalRulerInfoExtension)
        ((IVerticalRulerInfoExtension) service).removeVerticalRulerListener(this);
    }
    super.setEditor(editor);
    if (getTextEditor() != null) {
      IVerticalRulerInfo service= (IVerticalRulerInfo) 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());
  }

  /*
   * @see org.eclipse.ui.texteditor.IVerticalRulerListener#annotationSelected(org.eclipse.ui.texteditor.VerticalRulerEvent)
   */
  public void annotationSelected(VerticalRulerEvent event) {
  }

  /*
   * @see org.eclipse.ui.texteditor.IVerticalRulerListener#annotationDefaultSelected(org.eclipse.ui.texteditor.VerticalRulerEvent)
   */
  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);
  }

  /*
   * @see org.eclipse.ui.texteditor.IVerticalRulerListener#annotationContextMenuAboutToShow(org.eclipse.ui.texteditor.VerticalRulerEvent, org.eclipse.swt.widgets.Menu)
   */
  public void annotationContextMenuAboutToShow(VerticalRulerEvent event, Menu menu) {
  }
}
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