/*******************************************************************************

  * Copyright (c) 2009 Ketan Padegaonkar 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:

  *     Ketan Padegaonkar - initial API and implementation

  *******************************************************************************/

 package org.eclipse.swtbot.swt.finder.widgets;

 import java.util.regex.Matcher;

 import java.util.regex.Pattern;

 import org.eclipse.swt.SWT;

 import org.eclipse.swt.widgets.Event;

 import org.eclipse.swt.widgets.Link;

 import org.eclipse.swtbot.swt.finder.ReferenceBy;

 import org.eclipse.swtbot.swt.finder.SWTBotWidget;

 import org.eclipse.swtbot.swt.finder.exceptions.WidgetNotFoundException;

 import org.eclipse.swtbot.swt.finder.utils.internal.Assert;

 import org.hamcrest.SelfDescribing;

 /**

  * This represents a {@link Link} widget.

  * 

  * @author Ketan Padegaonkar <KetanPadegaonkar [at] gmail [dot] com>

  * @version $Id$

  */

 @SWTBotWidget(clasz = Link.class, preferredName = "link", referenceBy = { ReferenceBy.MNEMONIC })

 public class SWTBotLink extends AbstractSWTBotControl<Link> {

         /**

          * Constructs a new instance with the given widget.

          * 

          * @param w the widget.

          * @throws WidgetNotFoundException if the widget is <code>null</code> or widget has been disposed.

          */

         public SWTBotLink(Link w) throws WidgetNotFoundException {

                 super(w);

         }

         /**

          * Constructs a new instance with the given widget.

          * 

          * @param w the widget.

          * @param description the description of the widget, this will be reported by {@link #toString()}

          * @throws WidgetNotFoundException if the widget is <code>null</code> or widget has been disposed.

          */

         public SWTBotLink(Link w, SelfDescribing description) throws WidgetNotFoundException {

                 super(w, description);

         }

         public AbstractSWTBot<Link> click() {

                 return click(true);

         }

         /**

          * Clicks on the hyperlink with the specified text.

          * 

          * @param hyperlinkText the text of the hyperlink in case there are more than one hyperlinks.

          * @return itself.

          */

         public AbstractSWTBot<Link> click(String hyperlinkText) {

                 String text = getText();

                 boolean isText = text.contains(">" + hyperlinkText + "<");

                 Assert.isLegal(isText, "Link does not contain text (" + hyperlinkText + "). It contains (" + text + ")");

                 hyperlinkText = extractHyperlinkTextOrHREF(hyperlinkText, text);

                 notify(SWT.MouseDown, createMouseEvent(0, 0, 1, SWT.NONE, 1));

                 notify(SWT.Selection, createHyperlinkEvent(hyperlinkText));

                 notify(SWT.MouseUp, createMouseEvent(0, 0, 1, SWT.BUTTON1, 1));

                 return this;

         }

         private String extractHyperlinkTextOrHREF(String hyperlinkText, String text) {

                 Pattern pattern = Pattern.compile(".*<[aA] [hH][rR][eE][fF]\\s*=\\s*['\"](.*)['\"]>" + hyperlinkText + "</[aA]>.*");

                 Matcher matcher = pattern.matcher(text);

                 return matcher.find() ? matcher.group(1) : hyperlinkText;

         }

         private Event createHyperlinkEvent(String hyperlinkText) {

                 Event e = createEvent();

                 e.text = hyperlinkText;

                 return e;

         }

 }