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.fximpl;
20 import java.io.BufferedReader;
21 import java.io.Reader;
22 import org.apidesign.html.boot.spi.Fn;
24 import java.util.ArrayList;
25 import java.util.Arrays;
26 import java.util.Collection;
27 import java.util.List;
28 import java.util.TooManyListenersException;
29 import javafx.beans.value.ChangeListener;
30 import javafx.scene.web.WebEngine;
31 import netscape.javascript.JSObject;
32 import org.apidesign.html.boot.impl.FindResources;
33 import org.apidesign.html.boot.impl.FnUtils;
37 * @author Jaroslav Tulach <jtulach@netbeans.org>
39 public final class JVMBridge {
40 private final WebEngine engine;
41 private final ClassLoader cl;
42 private final WebPresenter presenter;
44 private static ClassLoader[] ldrs;
45 private static ChangeListener<Void> onBck2BrwsrLoad;
47 JVMBridge(WebEngine eng) {
49 final ClassLoader p = JVMBridge.class.getClassLoader().getParent();
50 this.presenter = new WebPresenter();
51 this.cl = FnUtils.newLoader(presenter, presenter, p);
54 public static void registerClassLoaders(ClassLoader[] loaders) {
55 ldrs = loaders.clone();
58 public static void addBck2BrwsrLoad(ChangeListener<Void> l) throws TooManyListenersException {
59 if (onBck2BrwsrLoad != null) {
60 throw new TooManyListenersException();
65 public static void onBck2BrwsrLoad() {
66 ChangeListener<Void> l = onBck2BrwsrLoad;
68 l.changed(null, null, null);
72 public Class<?> loadClass(String name) throws ClassNotFoundException {
73 FnUtils.currentPresenter(presenter);
74 return Class.forName(name, true, cl);
77 private final class WebPresenter implements FindResources, Fn.Presenter {
79 public void findResources(String name, Collection<? super URL> results, boolean oneIsEnough) {
80 if (ldrs != null) for (ClassLoader l : ldrs) {
81 URL u = l.getResource(name);
89 public Fn defineFn(String code, String... names) {
90 StringBuilder sb = new StringBuilder();
91 sb.append("(function() {");
92 sb.append(" return function(");
94 for (String n : names) {
95 sb.append(sep).append(n);
103 JSObject x = (JSObject) engine.executeScript(sb.toString());
104 return new JSFn(this, x);
108 public void displayPage(URL page, Runnable onPageLoad) {
109 throw new UnsupportedOperationException("Not supported yet.");
113 public void loadScript(Reader code) throws Exception {
114 BufferedReader r = new BufferedReader(code);
115 StringBuilder sb = new StringBuilder();
117 String l = r.readLine();
121 sb.append(l).append('\n');
123 engine.executeScript(sb.toString());
127 private static final class JSFn extends Fn {
128 private final JSObject fn;
130 private JSFn(WebPresenter cl, JSObject fn) {
136 public Object invoke(Object thiz, Object... args) throws Exception {
138 List<Object> all = new ArrayList<Object>(args.length + 1);
139 all.add(thiz == null ? fn : thiz);
140 all.addAll(Arrays.asList(args));
141 Object ret = fn.call("call", all.toArray()); // NOI18N
142 return ret == fn ? null : ret;
146 } catch (Exception t) {