DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (777e60ca8853)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231
// -*- Mode: js2; tab-width: 2; indent-tabs-mode: nil; js2-basic-offset: 2; js2-skip-preprocessor-directives: t; -*-
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

"use strict";

this.EXPORTED_SYMBOLS = ["RokuApp"];

const { classes: Cc, interfaces: Ci, utils: Cu } = Components;

Cu.import("resource://gre/modules/Services.jsm");

function log(msg) {
  //Services.console.logStringMessage(msg);
}

const PROTOCOL_VERSION = 1;

/* RokuApp is a wrapper for interacting with a Roku channel.
 * The basic interactions all use a REST API.
 * spec: http://sdkdocs.roku.com/display/sdkdoc/External+Control+Guide
 */
function RokuApp(service, app) {
  this.service = service;
  this.resourceURL = this.service.location;
  this.app = app;
  this.appID = -1;
}

RokuApp.prototype = {
  status: function status(callback) {
    // We have no way to know if the app is running, so just return "unknown"
    // but we use this call to fetch the appID for the given app name
    let url = this.resourceURL + "query/apps";
    let xhr = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance(Ci.nsIXMLHttpRequest);
    xhr.open("GET", url, true);
    xhr.channel.loadFlags |= Ci.nsIRequest.INHIBIT_CACHING;
    xhr.overrideMimeType("text/xml");

    xhr.addEventListener("load", (function() {
      if (xhr.status == 200) {
        let doc = xhr.responseXML;
        let apps = doc.querySelectorAll("app");
        for (let app of apps) {
          if (app.textContent == this.app) {
            this.appID = app.id;
          }
        }
      }

      // Since ECP has no way of telling us if an app is running, we always return "unknown"
      if (callback) {
        callback({ state: "unknown" });
      }
    }).bind(this), false);

    xhr.addEventListener("error", (function() {
      if (callback) {
        callback({ state: "unknown" });
      }
    }).bind(this), false);

    xhr.send(null);
  },

  start: function start(callback) {
    // We need to make sure we have cached the appID
    if (this.appID == -1) {
      this.status(function() {
        // If we found the appID, use it to make a new start call
        if (this.appID != -1) {
          this.start(callback);
        } else {
          // We failed to start the app, so let the caller know
          callback(false);
        }
      }.bind(this));
      return;
    }

    // Start a given app with any extra query data. Each app uses it's own data scheme.
    // NOTE: Roku will also pass "source=external-control" as a param
    let url = this.resourceURL + "launch/" + this.appID + "?version=" + parseInt(PROTOCOL_VERSION);
    let xhr = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance(Ci.nsIXMLHttpRequest);
    xhr.open("POST", url, true);
    xhr.overrideMimeType("text/plain");

    xhr.addEventListener("load", (function() {
      if (callback) {
        callback(xhr.status === 200);
      }
    }).bind(this), false);

    xhr.addEventListener("error", (function() {
      if (callback) {
        callback(false);
      }
    }).bind(this), false);

    xhr.send(null);
  },

  stop: function stop(callback) {
    // Roku doesn't seem to support stopping an app, so let's just go back to
    // the Home screen
    let url = this.resourceURL + "keypress/Home";
    let xhr = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance(Ci.nsIXMLHttpRequest);
    xhr.open("POST", url, true);
    xhr.overrideMimeType("text/plain");

    xhr.addEventListener("load", (function() {
      if (callback) {
        callback(xhr.status === 200);
      }
    }).bind(this), false);

    xhr.addEventListener("error", (function() {
      if (callback) {
        callback(false);
      }
    }).bind(this), false);

    xhr.send(null);
  },

  remoteMedia: function remoteMedia(callback, listener) {
    if (this.appID != -1) {
      if (callback) {
        callback(new RemoteMedia(this.resourceURL, listener));
      }
    } else {
      if (callback) {
        callback();
      }
    }
  }
}

/* RemoteMedia provides a wrapper for using TCP socket to control Roku apps.
 * The server implementation must be built into the Roku receiver app.
 */
function RemoteMedia(url, listener) {
  this._url = url;
  this._listener = listener;
  this._status = "uninitialized";

  let serverURI = Services.io.newURI(this._url , null, null);
  this._socket = Cc["@mozilla.org/network/socket-transport-service;1"].getService(Ci.nsISocketTransportService).createTransport(null, 0, serverURI.host, 9191, null);
  this._outputStream = this._socket.openOutputStream(0, 0, 0);

  this._scriptableStream = Cc["@mozilla.org/scriptableinputstream;1"].createInstance(Ci.nsIScriptableInputStream);

  this._inputStream = this._socket.openInputStream(0, 0, 0);
  this._pump = Cc["@mozilla.org/network/input-stream-pump;1"].createInstance(Ci.nsIInputStreamPump);
  this._pump.init(this._inputStream, -1, -1, 0, 0, true);
  this._pump.asyncRead(this, null);
}

RemoteMedia.prototype = {
  onStartRequest: function(request, context) {
  },

  onDataAvailable: function(request, context, stream, offset, count) {
    this._scriptableStream.init(stream);
    let data = this._scriptableStream.read(count);
    if (!data) {
      return;
    }

    let msg = JSON.parse(data);
    if (this._status === msg._s) {
      return;
    }

    this._status = msg._s;

    if (this._listener) {
      // Check to see if we are getting the initial "connected" message
      if (this._status == "connected" && "onRemoteMediaStart" in this._listener) {
        this._listener.onRemoteMediaStart(this);
      }

      if ("onRemoteMediaStatus" in this._listener) {
        this._listener.onRemoteMediaStatus(this);
      }
    }
  },

  onStopRequest: function(request, context, result) {
    if (this._listener && "onRemoteMediaStop" in this._listener)
      this._listener.onRemoteMediaStop(this);
  },

  _sendMsg: function _sendMsg(data) {
    if (!data)
      return;

    // Add the protocol version
    data["_v"] = PROTOCOL_VERSION;

    let raw = JSON.stringify(data);
    this._outputStream.write(raw, raw.length);
  },

  shutdown: function shutdown() {
    this._outputStream.close();
    this._inputStream.close();
  },

  get active() {
    return (this._socket && this._socket.isAlive());
  },

  play: function play() {
    // TODO: add position support
    this._sendMsg({ type: "PLAY" });
  },

  pause: function pause() {
    this._sendMsg({ type: "STOP" });
  },

  load: function load(aData) {
    this._sendMsg({ type: "LOAD", title: aData.title, source: aData.source, poster: aData.poster });
  },

  get status() {
    return this._status;
  }
}