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// -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
/* 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 = ["PresentationApp"];
const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
XPCOMUtils.defineLazyGetter(this, "sysInfo", () => {
return Cc["@mozilla.org/system-info;1"].getService(Ci.nsIPropertyBag2);
});
const DEBUG = false;
const STATE_UNINIT = "uninitialized" // RemoteMedia status
const STATE_STARTED = "started"; // RemoteMedia status
const STATE_PAUSED = "paused"; // RemoteMedia status
const STATE_SHUTDOWN = "shutdown"; // RemoteMedia status
function debug(msg) {
Services.console.logStringMessage("PresentationApp: " + msg);
}
// PresentationApp is a wrapper for interacting with a Presentation Receiver Device.
function PresentationApp(service, request) {
this.service = service;
this.request = request;
}
PresentationApp.prototype = {
start: function start(callback) {
this.request.startWithDevice(this.service.uuid)
.then((session) => {
this._session = session;
if (callback) {
session.addEventListener('connect', () => {
callback(true);
});
}
}, () => {
if (callback) {
callback(false);
}
});
},
stop: function stop(callback) {
if (this._session && this._session.state === "connected") {
this._session.terminate();
}
delete this._session;
if (callback) {
callback(true);
}
},
remoteMedia: function remoteMedia(callback, listener) {
if (callback) {
if (!this._session) {
callback();
return;
}
callback(new RemoteMedia(this._session, listener));
}
}
}
/* RemoteMedia provides a wrapper for using Presentation API to control Firefox TV app.
* The server implementation must be built into the Firefox TV receiver app.
* see https://github.com/mozilla-b2g/gaia/tree/master/tv_apps/fling-player
*/
function RemoteMedia(session, listener) {
this._session = session ;
this._listener = listener;
this._status = STATE_UNINIT;
this._session.addEventListener("message", this);
this._session.addEventListener("terminate", this);
if (this._listener && "onRemoteMediaStart" in this._listener) {
Services.tm.mainThread.dispatch((function() {
this._listener.onRemoteMediaStart(this);
}).bind(this), Ci.nsIThread.DISPATCH_NORMAL);
}
}
RemoteMedia.prototype = {
_seq: 0,
handleEvent: function(e) {
switch (e.type) {
case "message":
this._onmessage(e);
break;
case "terminate":
this._onterminate(e);
break;
}
},
_onmessage: function(e) {
DEBUG && debug("onmessage: " + e.data);
if (this.status === STATE_SHUTDOWN) {
return;
}
if (e.data.indexOf("stopped") > -1) {
if (this.status !== STATE_PAUSED) {
this._status = STATE_PAUSED;
if (this._listener && "onRemoteMediaStatus" in this._listener) {
this._listener.onRemoteMediaStatus(this);
}
}
} else if (e.data.indexOf("playing") > -1) {
if (this.status !== STATE_STARTED) {
this._status = STATE_STARTED;
if (this._listener && "onRemoteMediaStatus" in this._listener) {
this._listener.onRemoteMediaStatus(this);
}
}
}
},
_onterminate: function(e) {
DEBUG && debug("onterminate: " + this._session.state);
this._status = STATE_SHUTDOWN;
if (this._listener && "onRemoteMediaStop" in this._listener) {
this._listener.onRemoteMediaStop(this);
}
},
_sendCommand: function(command, data) {
let msg = {
'type': command,
'seq': ++this._seq
};
if (data) {
for (var k in data) {
msg[k] = data[k];
}
}
let raw = JSON.stringify(msg);
DEBUG && debug("send command: " + raw);
this._session.send(raw);
},
shutdown: function shutdown() {
DEBUG && debug("RemoteMedia - shutdown");
this._sendCommand("close");
},
play: function play() {
DEBUG && debug("RemoteMedia - play");
this._sendCommand("play");
},
pause: function pause() {
DEBUG && debug("RemoteMedia - pause");
this._sendCommand("pause");
},
load: function load(data) {
DEBUG && debug("RemoteMedia - load: " + data);
this._sendCommand("load", { "url": data.source });
let deviceName;
if (Services.appinfo.widgetToolkit == "android") {
deviceName = sysInfo.get("device");
} else {
deviceName = sysInfo.get("host");
}
this._sendCommand("device-info", { "displayName": deviceName });
},
get status() {
return this._status;
}
}
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