1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/ko/bck2brwsr/src/main/java/org/apidesign/bck2brwsr/ko2brwsr/LoadWS.java Thu Aug 29 14:35:01 2013 +0000
1.3 @@ -0,0 +1,126 @@
1.4 +/**
1.5 + * Back 2 Browser Bytecode Translator
1.6 + * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
1.7 + *
1.8 + * This program is free software: you can redistribute it and/or modify
1.9 + * it under the terms of the GNU General Public License as published by
1.10 + * the Free Software Foundation, version 2 of the License.
1.11 + *
1.12 + * This program is distributed in the hope that it will be useful,
1.13 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.14 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.15 + * GNU General Public License for more details.
1.16 + *
1.17 + * You should have received a copy of the GNU General Public License
1.18 + * along with this program. Look for COPYING file in the top folder.
1.19 + * If not, see http://opensource.org/licenses/GPL-2.0.
1.20 + */
1.21 +package org.apidesign.bck2brwsr.ko2brwsr;
1.22 +
1.23 +import net.java.html.js.JavaScriptBody;
1.24 +import org.apidesign.html.json.spi.JSONCall;
1.25 +
1.26 +/** Communication with WebSockets for WebView 1.8.
1.27 + *
1.28 + * @author Jaroslav Tulach <jtulach@netbeans.org>
1.29 + */
1.30 +final class LoadWS {
1.31 + private static final boolean SUPPORTED = isWebSocket();
1.32 + private final Object ws;
1.33 + private final JSONCall call;
1.34 + LoadWS(JSONCall first, String url) {
1.35 + call = first;
1.36 + ws = initWebSocket(this, url);
1.37 + if (ws == null) {
1.38 + first.notifyError(new IllegalArgumentException("Wrong URL: " + url));
1.39 + }
1.40 + }
1.41 +
1.42 + static boolean isSupported() {
1.43 + return SUPPORTED;
1.44 + }
1.45 +
1.46 + void send(JSONCall call) {
1.47 + push(call);
1.48 + }
1.49 +
1.50 + private synchronized void push(JSONCall call) {
1.51 + send(ws, call.getMessage());
1.52 + }
1.53 +
1.54 + void onOpen(Object ev) {
1.55 + if (!call.isDoOutput()) {
1.56 + call.notifySuccess(null);
1.57 + }
1.58 + }
1.59 +
1.60 +
1.61 + @JavaScriptBody(args = { "data" }, body = "try {\n"
1.62 + + " return eval('(' + data + ')');\n"
1.63 + + " } catch (error) {;\n"
1.64 + + " return data;\n"
1.65 + + " }\n"
1.66 + )
1.67 + private static native Object toJSON(String data);
1.68 +
1.69 + void onMessage(Object ev, String data) {
1.70 + Object json = toJSON(data);
1.71 + call.notifySuccess(json);
1.72 + }
1.73 +
1.74 + void onError(Object ev) {
1.75 + call.notifyError(new Exception(ev.toString()));
1.76 + }
1.77 +
1.78 + void onClose(boolean wasClean, int code, String reason) {
1.79 + call.notifyError(null);
1.80 + }
1.81 +
1.82 + @JavaScriptBody(args = {}, body = "if (window.WebSocket) return true; else return false;")
1.83 + private static boolean isWebSocket() {
1.84 + return false;
1.85 + }
1.86 +
1.87 + @JavaScriptBody(args = { "back", "url" }, javacall = true, body = ""
1.88 + + "if (window.WebSocket) {\n"
1.89 + + " try {\n"
1.90 + + " var ws = new window.WebSocket(url);\n"
1.91 + + " ws.onopen = function(ev) {\n"
1.92 + + " back.@org.apidesign.bck2brwsr.ko2brwsr.LoadWS::onOpen(Ljava/lang/Object;)(ev);\n"
1.93 + + " };\n"
1.94 + + " ws.onmessage = function(ev) {\n"
1.95 + + " back.@org.apidesign.bck2brwsr.ko2brwsr.LoadWS::onMessage(Ljava/lang/Object;Ljava/lang/String;)(ev, ev.data);\n"
1.96 + + " };\n"
1.97 + + " ws.onerror = function(ev) {\n"
1.98 + + " back.@org.apidesign.bck2brwsr.ko2brwsr.LoadWS::onError(Ljava/lang/Object;)(ev);\n"
1.99 + + " };\n"
1.100 + + " ws.onclose = function(ev) {\n"
1.101 + + " back.@org.apidesign.bck2brwsr.ko2brwsr.LoadWS::onClose(ZILjava/lang/String;)(ev.wasClean, ev.code, ev.reason);\n"
1.102 + + " };\n"
1.103 + + " return ws;\n"
1.104 + + " } catch (ex) {\n"
1.105 + + " return null;\n"
1.106 + + " }\n"
1.107 + + "} else {\n"
1.108 + + " return null;\n"
1.109 + + "}\n"
1.110 + )
1.111 + private static Object initWebSocket(Object back, String url) {
1.112 + return null;
1.113 + }
1.114 +
1.115 +
1.116 + @JavaScriptBody(args = { "ws", "msg" }, body = ""
1.117 + + "ws.send(msg);"
1.118 + )
1.119 + private void send(Object ws, String msg) {
1.120 + }
1.121 +
1.122 + @JavaScriptBody(args = { "ws" }, body = "ws.close();")
1.123 + private static void close(Object ws) {
1.124 + }
1.125 +
1.126 + void close() {
1.127 + close(ws);
1.128 + }
1.129 +}