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;
23 import java.util.ArrayList;
24 import java.util.Arrays;
25 import java.util.Collection;
26 import java.util.List;
27 import java.util.TooManyListenersException;
28 import java.util.concurrent.Executor;
29 import java.util.logging.Level;
30 import java.util.logging.Logger;
31 import javafx.application.Platform;
32 import javafx.beans.value.ChangeListener;
33 import javafx.scene.web.WebEngine;
34 import netscape.javascript.JSObject;
35 import org.apidesign.html.boot.spi.Fn;
36 import org.netbeans.html.boot.impl.FindResources;
37 import org.netbeans.html.boot.impl.FnUtils;
41 * @author Jaroslav Tulach <jtulach@netbeans.org>
43 public final class JVMBridge {
44 static final Logger LOG = Logger.getLogger(JVMBridge.class.getName());
46 private final WebEngine engine;
47 private final ClassLoader cl;
48 private final WebPresenter presenter;
50 private static ClassLoader[] ldrs;
51 private static ChangeListener<Void> onBck2BrwsrLoad;
53 JVMBridge(WebEngine eng) {
55 final ClassLoader p = JVMBridge.class.getClassLoader().getParent();
56 this.presenter = new WebPresenter();
57 this.cl = FnUtils.newLoader(presenter, presenter, p);
60 public static void registerClassLoaders(ClassLoader[] loaders) {
61 ldrs = loaders.clone();
64 public static void addBck2BrwsrLoad(ChangeListener<Void> l) throws TooManyListenersException {
65 if (onBck2BrwsrLoad != null) {
66 throw new TooManyListenersException();
71 public static void onBck2BrwsrLoad() {
72 ChangeListener<Void> l = onBck2BrwsrLoad;
74 l.changed(null, null, null);
78 public Class<?> loadClass(String name) throws ClassNotFoundException {
79 Fn.activate(presenter);
80 return Class.forName(name, true, cl);
83 private final class WebPresenter
84 implements FindResources, Fn.Presenter, Fn.ToJavaScript, Fn.FromJavaScript, Executor {
86 public void findResources(String name, Collection<? super URL> results, boolean oneIsEnough) {
87 if (ldrs != null) for (ClassLoader l : ldrs) {
88 URL u = l.getResource(name);
96 public Fn defineFn(String code, String... names) {
97 return defineJSFn(code, names);
99 private JSFn defineJSFn(String code, String... names) {
100 StringBuilder sb = new StringBuilder();
101 sb.append("(function() {");
102 sb.append(" return function(");
104 for (String n : names) {
105 sb.append(sep).append(n);
113 JSObject x = (JSObject) engine.executeScript(sb.toString());
114 return new JSFn(this, x);
118 public void displayPage(URL page, Runnable onPageLoad) {
119 throw new UnsupportedOperationException("Not supported yet.");
123 public void loadScript(Reader code) throws Exception {
124 BufferedReader r = new BufferedReader(code);
125 StringBuilder sb = new StringBuilder();
127 String l = r.readLine();
131 sb.append(l).append('\n');
133 engine.executeScript(sb.toString());
137 public Object toJava(Object js) {
138 return checkArray(js);
142 public Object toJavaScript(Object toReturn) {
143 if (toReturn instanceof Object[]) {
144 return convertArrays((Object[]) toReturn);
150 public void execute(Runnable command) {
151 if (Platform.isFxApplicationThread()) {
154 Platform.runLater(command);
158 final JSObject convertArrays(Object[] arr) {
159 for (int i = 0; i < arr.length; i++) {
160 if (arr[i] instanceof Object[]) {
161 arr[i] = convertArrays((Object[]) arr[i]);
164 final JSObject wrapArr = (JSObject) wrapArrFn().call("array", arr); // NOI18N
168 private JSObject wrapArrImpl;
170 private final JSObject wrapArrFn() {
171 if (wrapArrImpl == null) {
173 wrapArrImpl = (JSObject) defineJSFn(" var k = {};"
174 + " k.array= function() {"
175 + " return Array.prototype.slice.call(arguments);"
178 ).invokeImpl(null, false);
179 } catch (Exception ex) {
180 throw new IllegalStateException(ex);
186 final Object checkArray(Object val) {
187 int length = ((Number) arraySizeFn().call("array", val, null)).intValue();
191 Object[] arr = new Object[length];
192 arraySizeFn().call("array", val, arr);
195 private JSObject arraySize;
197 private final JSObject arraySizeFn() {
198 if (arraySize == null) {
200 arraySize = (JSObject) defineJSFn(" var k = {};"
201 + " k.array = function(arr, to) {"
202 + " if (to === null) {"
203 + " if (Object.prototype.toString.call(arr) === '[object Array]') return arr.length;"
206 + " var l = arr.length;"
207 + " for (var i = 0; i < l; i++) to[i] = arr[i];"
212 ).invokeImpl(null, false);
213 } catch (Exception ex) {
214 throw new IllegalStateException(ex);
222 private static final class JSFn extends Fn {
223 private final JSObject fn;
225 private JSFn(WebPresenter cl, JSObject fn) {
231 public Object invoke(Object thiz, Object... args) throws Exception {
232 return invokeImpl(thiz, true, args);
235 final Object invokeImpl(Object thiz, boolean arrayChecks, Object... args) throws Exception {
237 List<Object> all = new ArrayList<Object>(args.length + 1);
238 all.add(thiz == null ? fn : thiz);
239 for (int i = 0; i < args.length; i++) {
240 if (arrayChecks && args[i] instanceof Object[]) {
241 Object[] arr = (Object[]) args[i];
242 Object conv = ((WebPresenter) presenter()).convertArrays(arr);
247 Object ret = fn.call("call", all.toArray()); // NOI18N
254 return ((WebPresenter) presenter()).checkArray(ret);
258 } catch (Exception t) {