Adopting to new names of SPI packages to be introduced by version 1.0 of html4j API
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.Collection;
25 import java.util.List;
26 import java.util.TooManyListenersException;
27 import java.util.concurrent.Executor;
28 import java.util.logging.Logger;
29 import javafx.application.Platform;
30 import javafx.beans.value.ChangeListener;
31 import javafx.scene.web.WebEngine;
32 import netscape.javascript.JSObject;
33 import org.netbeans.html.boot.impl.FindResources;
34 import org.netbeans.html.boot.impl.FnUtils;
35 import org.netbeans.html.boot.spi.Fn;
39 * @author Jaroslav Tulach <jtulach@netbeans.org>
41 public final class JVMBridge {
42 static final Logger LOG = Logger.getLogger(JVMBridge.class.getName());
44 private final WebEngine engine;
45 private final ClassLoader cl;
46 private final WebPresenter presenter;
48 private static ClassLoader[] ldrs;
49 private static ChangeListener<Void> onBck2BrwsrLoad;
51 JVMBridge(WebEngine eng) {
53 final ClassLoader p = JVMBridge.class.getClassLoader().getParent();
54 this.presenter = new WebPresenter();
55 this.cl = FnUtils.newLoader(presenter, presenter, p);
58 public static void registerClassLoaders(ClassLoader[] loaders) {
59 ldrs = loaders.clone();
62 public static void addBck2BrwsrLoad(ChangeListener<Void> l) throws TooManyListenersException {
63 if (onBck2BrwsrLoad != null) {
64 throw new TooManyListenersException();
69 public static void onBck2BrwsrLoad() {
70 ChangeListener<Void> l = onBck2BrwsrLoad;
72 l.changed(null, null, null);
76 public Class<?> loadClass(String name) throws ClassNotFoundException {
77 Fn.activate(presenter);
78 return Class.forName(name, true, cl);
81 private final class WebPresenter
82 implements FindResources, Fn.Presenter, Fn.ToJavaScript, Fn.FromJavaScript, Executor {
84 public void findResources(String name, Collection<? super URL> results, boolean oneIsEnough) {
85 if (ldrs != null) for (ClassLoader l : ldrs) {
86 URL u = l.getResource(name);
94 public Fn defineFn(String code, String... names) {
95 return defineJSFn(code, names);
97 private JSFn defineJSFn(String code, String... names) {
98 StringBuilder sb = new StringBuilder();
99 sb.append("(function() {");
100 sb.append(" return function(");
102 for (String n : names) {
103 sb.append(sep).append(n);
111 JSObject x = (JSObject) engine.executeScript(sb.toString());
112 return new JSFn(this, x);
116 public void displayPage(URL page, Runnable onPageLoad) {
117 throw new UnsupportedOperationException("Not supported yet.");
121 public void loadScript(Reader code) throws Exception {
122 BufferedReader r = new BufferedReader(code);
123 StringBuilder sb = new StringBuilder();
125 String l = r.readLine();
129 sb.append(l).append('\n');
131 engine.executeScript(sb.toString());
135 public Object toJava(Object js) {
136 return checkArray(js);
140 public Object toJavaScript(Object toReturn) {
141 if (toReturn instanceof Object[]) {
142 return convertArrays((Object[]) toReturn);
148 public void execute(Runnable command) {
149 if (Platform.isFxApplicationThread()) {
152 Platform.runLater(command);
156 final JSObject convertArrays(Object[] arr) {
157 for (int i = 0; i < arr.length; i++) {
158 if (arr[i] instanceof Object[]) {
159 arr[i] = convertArrays((Object[]) arr[i]);
162 final JSObject wrapArr = (JSObject) wrapArrFn().call("array", arr); // NOI18N
166 private JSObject wrapArrImpl;
168 private final JSObject wrapArrFn() {
169 if (wrapArrImpl == null) {
171 wrapArrImpl = (JSObject) defineJSFn(" var k = {};"
172 + " k.array= function() {"
173 + " return Array.prototype.slice.call(arguments);"
176 ).invokeImpl(null, false);
177 } catch (Exception ex) {
178 throw new IllegalStateException(ex);
184 final Object checkArray(Object val) {
185 int length = ((Number) arraySizeFn().call("array", val, null)).intValue();
189 Object[] arr = new Object[length];
190 arraySizeFn().call("array", val, arr);
193 private JSObject arraySize;
195 private final JSObject arraySizeFn() {
196 if (arraySize == null) {
198 arraySize = (JSObject) defineJSFn(" var k = {};"
199 + " k.array = function(arr, to) {"
200 + " if (to === null) {"
201 + " if (Object.prototype.toString.call(arr) === '[object Array]') return arr.length;"
204 + " var l = arr.length;"
205 + " for (var i = 0; i < l; i++) to[i] = arr[i];"
210 ).invokeImpl(null, false);
211 } catch (Exception ex) {
212 throw new IllegalStateException(ex);
220 private static final class JSFn extends Fn {
221 private final JSObject fn;
223 private JSFn(WebPresenter cl, JSObject fn) {
229 public Object invoke(Object thiz, Object... args) throws Exception {
230 return invokeImpl(thiz, true, args);
233 final Object invokeImpl(Object thiz, boolean arrayChecks, Object... args) throws Exception {
235 List<Object> all = new ArrayList<Object>(args.length + 1);
236 all.add(thiz == null ? fn : thiz);
237 for (int i = 0; i < args.length; i++) {
238 if (arrayChecks && args[i] instanceof Object[]) {
239 Object[] arr = (Object[]) args[i];
240 Object conv = ((WebPresenter) presenter()).convertArrays(arr);
245 Object ret = fn.call("call", all.toArray()); // NOI18N
252 return ((WebPresenter) presenter()).checkArray(ret);
256 } catch (Exception t) {