BrowserProgressListener.java

/*******************************************************************************
 * Copyright (c) 2016 Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is 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:
 * Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.jboss.tools.browsersim.widgets;

import org.eclipse.swt.browser.ProgressEvent;
import org.eclipse.swt.browser.ProgressListener;

/**
 * Internal Progress Listener of Browser 
 * @author Vlado Pakan
 *
 */
public class BrowserProgressListener implements ProgressListener {
	private final Browser browser;
	private boolean done = true;
	private int numCalledIsDoneWithNoChange = 0;
	
	/**
	 * Instantiates a new browser progress listener.
	 *
	 * @param browser the browser
	 */
	public BrowserProgressListener(Browser browser) {
		this.browser = browser;
	}

	/**
	 * Returns true in case page is loaded completely or
	 * there is no change after calling this method more then 20 times
	 * because on MS Windows method completed is not called properly
	 *
	 * @return true, if is done
	 */
	public synchronized boolean isDone() {	
		numCalledIsDoneWithNoChange++;
		return done || numCalledIsDoneWithNoChange > 20;
	}

	/**
	 * Sets if the page is done loading or not-
	 *
	 * @param done true if done, false if not
	 */
	public synchronized void setDone(boolean done) {
		this.done = done;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.swt.browser.ProgressListener#changed(org.eclipse.swt.browser.ProgressEvent)
	 */
	public synchronized void changed(ProgressEvent event) {
		numCalledIsDoneWithNoChange = 0;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.swt.browser.ProgressListener#completed(org.eclipse.swt.browser.ProgressEvent)
	 */
	public void completed(ProgressEvent event) {
		setDone(true);
		browser.getSWTWidget().removeProgressListener(this);
	}

}