/*******************************************************************************
 * Copyright (c) 2010, 2012 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.browser;

import org.eclipse.swt.*;
import org.eclipse.swt.internal.gtk.*;

class BrowserFactory {

private Class<?> chromiumClass;

WebBrowser createWebBrowser (int style) {
	WebBrowser browser = null;
	if ((style & SWT.CHROMIUM) != 0) {
		browser = createChromium();
		if (browser != null) return browser;
	}
	if (OS.IsWin32) return createChromium();
	if (GTK.GTK4) return null;
	boolean webkitInstalled = WebKit.IsInstalled ();
	if (!webkitInstalled && (style & SWT.CHROMIUM) == 0) return createChromium();

	return new WebKit ();
}

private WebBrowser createChromium() {
	if (!OS.isX11()) {
		System.err.println ("SWT.CHROMIUM style is not supported in Wayland.");
		return null;
	}
	if (chromiumClass == null) {
		try {
			chromiumClass = Class.forName ("org.eclipse.swt.browser.ChromiumImpl"); //$NON-NLS-1$
			return (WebBrowser) chromiumClass.newInstance();
		} catch (ClassNotFoundException e) {
			/* chromium fragments missing */
			System.err.println ("SWT.CHROMIUM style was used but chromium.swt fragment/jar is missing from classpath."); //$NON-NLS-1$
		} catch (NoClassDefFoundError | InstantiationException | IllegalAccessException  e) {
			/* second attempt, do not print */
		} catch (UnsatisfiedLinkError e) {
			System.err.println ("SWT.CHROMIUM style was used but chromium.swt " + SWT.getPlatform() +  " (or CEF binaries) fragment/jar is missing."); //$NON-NLS-1$
		} catch (SWTError e) {
			// a more specific error determined by the implementation.
			System.err.println (e.getMessage()); //$NON-NLS-1$
		}
	}
	return null;
}

}