plugins/org.eclipse.actf.model.ui/src/org/eclipse/actf/model/ui/editor/browser/WaitForBrowserReadyHandler.java

/*******************************************************************************
 * Copyright (c) 2007, 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:
 *    Takashi ITOH - initial API and implementation
 *******************************************************************************/

package org.eclipse.actf.model.ui.editor.browser;

import org.eclipse.actf.ui.util.timer.WaitExecSyncEventHandler;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

/**
 * Utility class to register {@link Runnable} to {@link IWebBrowserACTF}. The
 * {@link Runnable} will be invoked when the {@link IWebBrowserACTF} becomes
 * ready.
 */
public class WaitForBrowserReadyHandler implements WaitExecSyncEventHandler {
	public static double INTERVAL = 0.5;

	private IWebBrowserACTF browser;

	private Runnable runnable;

	private boolean waitActive;

	private double timeout;

	/**
	 * Constructor of the class
	 * 
	 * @param browser
	 *            target {@link IWebBrowserACTF}
	 * @param timeout
	 *            timeout value
	 * @param waitActive
	 *            if true, wait {@link Shell} becomes active
	 * @param runnable
	 *            target {@link Runnable} to invoke
	 */
	public WaitForBrowserReadyHandler(IWebBrowserACTF browser, double timeout,
			boolean waitActive, Runnable runnable) {
		this.browser = browser;
		this.runnable = runnable;
		this.waitActive = waitActive;
		this.timeout = timeout;
	}

	public double getInterval() {
		return INTERVAL;
	}

	public boolean canRun(double elapsed) {
		try {
			// System.out.print("[" + browser.getReadyState() + "]");
			if (browser.isReady() || elapsed > timeout) {
				return !waitActive
						|| null != Display.getCurrent().getActiveShell();
			}
		} catch (Exception e) {
		}
		return false;
	}

	public void run() {
		runnable.run();
	}
}