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.text.template.contentassist;
  
  import org.eclipse.core.runtime.Assert;
  import org.eclipse.jface.text.IInformationControl;
  import org.eclipse.jface.text.IInformationControlCreator;
  import org.eclipse.jface.text.IInformationControlCreatorExtension;
  import org.eclipse.swt.SWT;
  import org.eclipse.swt.events.DisposeEvent;
  import org.eclipse.swt.events.DisposeListener;
  import org.eclipse.swt.widgets.Shell;
  import org.eclipse.wst.jsdt.internal.ui.text.java.hover.SourceViewerInformationControl;
  
  
  final public class TemplateInformationControlCreator implements IInformationControlCreator, IInformationControlCreatorExtension {
  
  	private SourceViewerInformationControl fControl;
  
  	/**
  	 * The orientation to be used by this hover.
  	 * Allowed values are: SWT#RIGHT_TO_LEFT or SWT#LEFT_TO_RIGHT
  	 * 
  	 */
  	private int fOrientation;
  
  	/**
  	 * @param orientation the orientation, allowed values are: SWT#RIGHT_TO_LEFT or SWT#LEFT_TO_RIGHT
  	 */
  	public TemplateInformationControlCreator(int orientation)  {
  		Assert.isLegal(orientation == SWT.RIGHT_TO_LEFT || orientation == SWT.LEFT_TO_RIGHT);
  		fOrientation= orientation;
  	}
  
  	/*
  	 * @see org.eclipse.jface.text.IInformationControlCreator#createInformationControl(org.eclipse.swt.widgets.Shell)
  	 */
  	public IInformationControl createInformationControl(Shell parent) {
  		fControl= new SourceViewerInformationControl(parent, SWT.TOOL | fOrientation, SWT.NONE);
  		fControl.addDisposeListener(new DisposeListener() {
  			public void widgetDisposed(DisposeEvent e) {
  				fControl= null;
  			}
  		});
  		return fControl;
  	}
  
  	/*
  	 * @see org.eclipse.jface.text.IInformationControlCreatorExtension#canReuse(org.eclipse.jface.text.IInformationControl)
  	 */
  	public boolean canReuse(IInformationControl control) {
  		return fControl == control && fControl != null;
  	}
  
  	/*
  	 * @see org.eclipse.jface.text.IInformationControlCreatorExtension#canReplace(org.eclipse.jface.text.IInformationControlCreator)
  	 */
  	public boolean canReplace(IInformationControlCreator creator) {
  		return (creator != null && getClass() == creator.getClass());
  	}
  }
  