There is a way for the JavaScript to tell the Java wrapper it is running: alert. Initialize bck2brwsr callback in alert handler.
2 * Back 2 Browser Bytecode Translator
3 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. Look for COPYING file in the top folder.
16 * If not, see http://opensource.org/licenses/GPL-2.0.
18 package org.apidesign.bck2brwsr.launcher;
20 import org.apidesign.bck2brwsr.launcher.impl.FXBrwsr;
21 import java.io.IOException;
22 import java.lang.reflect.Method;
25 import java.net.URLClassLoader;
27 import java.util.concurrent.Executors;
28 import java.util.logging.Level;
29 import java.util.logging.Logger;
30 import javafx.application.Platform;
31 import org.apidesign.bck2brwsr.launcher.impl.JVMBridge;
32 import org.apidesign.vm4brwsr.Bck2Brwsr;
36 * @author Jaroslav Tulach <jtulach@netbeans.org>
38 final class WebViewLauncher extends Bck2BrwsrLauncher {
39 private static final Logger LOG = Logger.getLogger(WebViewLauncher.class.getName());
42 Method m = URLClassLoader.class.getDeclaredMethod("addURL", URL.class);
43 m.setAccessible(true);
44 URL l = new URL("file://" + System.getProperty("java.home") + "/lib/jfxrt.jar");
45 LOG.log(Level.INFO, "url : {0}", l);
46 m.invoke(ClassLoader.getSystemClassLoader(), l);
47 } catch (Exception ex) {
48 throw new LinkageError("Can't add jfxrt.jar on the classpath", ex);
52 public WebViewLauncher() {
57 protected Object[] showBrwsr(final URI url) throws IOException {
59 JVMBridge.registerClassLoaders(loaders());
60 Executors.newSingleThreadExecutor().submit(new Runnable() {
63 FXBrwsr.launch(FXBrwsr.class, url.toString());
66 } catch (Throwable ex) {
67 LOG.log(Level.WARNING, "Can't open WebView", ex);
73 void generateBck2BrwsrJS(StringBuilder sb, Bck2Brwsr.Resources loader) throws IOException {
74 sb.append("(function() {\n"
75 + " alert('bck2brwsr');\n"
76 + " var impl = this.bck2brwsr;\n"
77 + " this.bck2brwsr = function() { return impl; };\n"
85 public void close() throws IOException {