content: /*******************************************************************************
   * 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.wst.jsdt.internal.ui.javaeditor;
  
  import org.eclipse.core.runtime.Assert;
  import org.eclipse.jface.text.link.ILinkedModeListener;
  import org.eclipse.jface.text.link.LinkedModeModel;
  
  
  /**
   * Turns off occurrences highlighting on a java editor until linked mode is
   * left.
   *
   * 
   */
  public class EditorHighlightingSynchronizer implements ILinkedModeListener {
  
  	private final JavaEditor fEditor;
  	private final boolean fWasOccurrencesOn;
  
  	/**
  	 * Creates a new synchronizer.
  	 *
  	 * @param editor the java editor the occurrences markers of which will be
  	 *        synchronized with the linked mode
  	 *
  	 */
  	public EditorHighlightingSynchronizer(JavaEditor editor) {
  		Assert.isLegal(editor != null);
  		fEditor= editor;
  		fWasOccurrencesOn= fEditor.isMarkingOccurrences();
  
  		if (fWasOccurrencesOn && !isEditorDisposed())
  			fEditor.uninstallOccurrencesFinder();
  	}
  
  	/*
  	 * @see org.eclipse.jface.text.link.ILinkedModeListener#left(org.eclipse.jface.text.link.LinkedModeModel, int)
  	 */
  	public void left(LinkedModeModel environment, int flags) {
  		if (fWasOccurrencesOn && !isEditorDisposed())
  			fEditor.installOccurrencesFinder(true);
  	}
  
  	/*
  	 * 
  	 */
  	private boolean isEditorDisposed() {
  		return fEditor == null || fEditor.getSelectionProvider() == null;
  	}
  
  	/*
  	 * @see org.eclipse.jface.text.link.ILinkedModeListener#suspend(org.eclipse.jface.text.link.LinkedModeModel)
  	 */
  	public void suspend(LinkedModeModel environment) {
  	}
  
  	/*
  	 * @see org.eclipse.jface.text.link.ILinkedModeListener#resume(org.eclipse.jface.text.link.LinkedModeModel, int)
  	 */
  	public void resume(LinkedModeModel environment, int flags) {
  	}
  
  }
  