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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- /
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* 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";
const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
this.EXPORTED_SYMBOLS = ["PresentationDeviceInfoService"];
function log(aMsg) {
//dump("PresentationDeviceInfoManager.jsm: " + aMsg + "\n");
}
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
XPCOMUtils.defineLazyServiceGetter(this, "presentationDeviceManager",
"@mozilla.org/presentation-device/manager;1",
"nsIPresentationDeviceManager");
XPCOMUtils.defineLazyServiceGetter(this, "ppmm",
"@mozilla.org/parentprocessmessagemanager;1",
"nsIMessageBroadcaster");
this.PresentationDeviceInfoService = {
QueryInterface: XPCOMUtils.generateQI([Ci.nsIMessageListener,
Ci.nsIObserver]),
init: function() {
log("init");
ppmm.addMessageListener("PresentationDeviceInfoManager:GetAll", this);
ppmm.addMessageListener("PresentationDeviceInfoManager:ForceDiscovery", this);
Services.obs.addObserver(this, "presentation-device-change", false);
},
getAll: function(aData, aMm) {
log("getAll");
let deviceArray = presentationDeviceManager.getAvailableDevices().QueryInterface(Ci.nsIArray);
if (!deviceArray) {
aData.error = "DataError";
aMm.sendAsyncMessage("PresentationDeviceInfoManager:GetAll:Result:Error", aData);
return;
}
aData.devices = [];
for (let i = 0; i < deviceArray.length; i++) {
let device = deviceArray.queryElementAt(i, Ci.nsIPresentationDevice);
aData.devices.push({
id: device.id,
name: device.name,
type: device.type,
});
}
aMm.sendAsyncMessage("PresentationDeviceInfoManager:GetAll:Result:Ok", aData);
},
forceDiscovery: function() {
log("forceDiscovery");
presentationDeviceManager.forceDiscovery();
},
observe: function(aSubject, aTopic, aData) {
log("observe: " + aTopic);
let device = aSubject.QueryInterface(Ci.nsIPresentationDevice);
let data = {
type: aData,
deviceInfo: {
id: device.id,
name: device.name,
type: device.type,
},
};
ppmm.broadcastAsyncMessage("PresentationDeviceInfoManager:OnDeviceChange", data);
},
receiveMessage: function(aMessage) {
if (!aMessage.target.assertPermission("presentation-device-manage")) {
debug("receive message " + aMessage.name +
" from a content process with no 'presentation-device-manage' privileges.");
return null;
}
let msg = aMessage.data || {};
let mm = aMessage.target;
log("receiveMessage: " + aMessage.name);
switch (aMessage.name) {
case "PresentationDeviceInfoManager:GetAll": {
this.getAll(msg, mm);
break;
}
case "PresentationDeviceInfoManager:ForceDiscovery": {
this.forceDiscovery();
break;
}
}
},
};
this.PresentationDeviceInfoService.init();
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