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/*******************************************************************************
* Copyright (c) 2000, 2011 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
* Martin Oberhuber (Wind River) - [352077] error dialogs when just probing browser
*******************************************************************************/
package org.eclipse.help.ui.internal.browser.embedded;
import org.eclipse.core.runtime.*;
import org.eclipse.help.browser.*;
import org.eclipse.help.internal.HelpPlugin;
import org.eclipse.help.internal.base.*;
import org.eclipse.help.ui.internal.*;
import org.eclipse.osgi.service.environment.*;
import org.eclipse.swt.*;
import org.eclipse.swt.browser.*;
import org.eclipse.swt.widgets.*;
public class EmbeddedBrowserFactory implements IBrowserFactory {
private boolean tested = false;
private boolean available = false;
/**
* Constructor.
*/
public EmbeddedBrowserFactory() {
super();
}
/*
* @see IBrowserFactory#isAvailable()
*/
public boolean isAvailable() {
if (BaseHelpSystem.getMode() == BaseHelpSystem.MODE_STANDALONE) {
try {
if (HelpUIEventLoop.isRunning()) {
Display.getDefault().syncExec(new Runnable() {
public void run() {
test();
}
});
}
} catch (Exception e) {
// just in case
}
} else {
test();
}
tested = true;
return available;
}
/**
* Must run on UI thread
*
* @return
*/
private boolean test() {
if (!Constants.OS_WIN32.equalsIgnoreCase(Platform.getOS())
&& !Constants.OS_LINUX.equalsIgnoreCase(Platform.getOS())) {
return false;
}
if (!tested) {
tested = true;
Shell sh = new Shell();
try {
new Browser(sh, SWT.NONE);
available = true;
} catch (SWTError se) {
if (se.code == SWT.ERROR_NO_HANDLES) {
// Browser not implemented
available = false;
} else {
Status errorStatus = new Status(IStatus.WARNING, HelpUIPlugin.PLUGIN_ID, IStatus.OK,
"An error occurred during creation of embedded help browser.", new Exception(se)); //$NON-NLS-1$
HelpPlugin.getDefault().getLog().log(errorStatus);
}
} catch (Exception e) {
// Browser not implemented
}
if (sh != null && !sh.isDisposed())
sh.dispose();
}
return available;
}
/*
* @see IBrowserFactory#createBrowser()
*/
public IBrowser createBrowser() {
return new EmbeddedBrowserAdapter();
}
}
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