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	Tue Feb 11 10:48:24 2014 +0100
     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 +}