gecko-dev/mobile/android/components/PresentationDevicePrompt.js

135 lines
4.0 KiB
JavaScript

/* -*- 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";
const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
Cu.import('resource://gre/modules/XPCOMUtils.jsm');
Cu.import('resource://gre/modules/Services.jsm');
XPCOMUtils.defineLazyModuleGetter(this, "Prompt",
"resource://gre/modules/Prompt.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "UITelemetry",
"resource://gre/modules/UITelemetry.jsm");
const kPRESENTATIONDEVICEPROMPT_CONTRACTID = "@mozilla.org/presentation-device/prompt;1";
const kPRESENTATIONDEVICEPROMPT_CID = Components.ID("{388bd149-c919-4a43-b646-d7ec57877689}");
function debug(aMsg) {
// dump("-*- PresentationDevicePrompt: " + aMsg + "\n");
}
// nsIPresentationDevicePrompt
function PresentationDevicePrompt() {
debug("PresentationDevicePrompt init");
}
PresentationDevicePrompt.prototype = {
classID: kPRESENTATIONDEVICEPROMPT_CID,
contractID: kPRESENTATIONDEVICEPROMPT_CONTRACTID,
classDescription: "Fennec Presentation Device Prompt",
QueryInterface: XPCOMUtils.generateQI([Ci.nsIPresentationDevicePrompt]),
_devices: [], // Store all available presentation devices
_request: null, // Store the request from presentation api
_getString: function(aName) {
debug("_getString");
if (!this.bundle) {
this.bundle = Services.strings.createBundle("chrome://browser/locale/devicePrompt.properties");
}
return this.bundle.GetStringFromName(aName);
},
_loadDevices: function(requestURLs) {
debug("_loadDevices");
let deviceManager = Cc["@mozilla.org/presentation-device/manager;1"]
.getService(Ci.nsIPresentationDeviceManager);
let devices = deviceManager.getAvailableDevices(requestURLs).QueryInterface(Ci.nsIArray);
// Re-load the available devices
this._devices = [];
for (let i = 0; i < devices.length; i++) {
let device = devices.queryElementAt(i, Ci.nsIPresentationDevice);
this._devices.push(device);
}
},
_getPromptMenu: function(aDevices) {
debug("_getPromptMenu");
return aDevices.map(function(device) {
return { label: device.name };
});
},
_getPrompt: function(aTitle, aMenu) {
debug("_getPrompt");
let p = new Prompt({
title: aTitle,
});
p.setSingleChoiceItems(aMenu);
return p;
},
_showPrompt: function(aPrompt, aCallback) {
debug("_showPrompt");
aPrompt.show(function(data) {
let buttonIndex = data.button;
aCallback(buttonIndex);
});
},
_selectDevice: function(aIndex) {
debug("_selectDevice");
if (!this._request) {
return;
}
if (aIndex < 0) { // Cancel request if no selected device,
this._request.cancel(Cr.NS_ERROR_DOM_NOT_ALLOWED_ERR);
return;
} else if (!this._devices.length) { // or there is no available devices
this._request.cancel(Cr.NS_ERROR_DOM_NOT_FOUND_ERR);
return;
}
this._request.select(this._devices[aIndex]);
},
// This will be fired when window.PresentationRequest(URL).start() is called
promptDeviceSelection: function(aRequest) {
debug("promptDeviceSelection");
// Load available presentation devices into this._devices
this._loadDevices(aRequest.requestURLs);
if (!this._devices.length) { // Cancel request if no available device
aRequest.cancel(Cr.NS_ERROR_DOM_NOT_FOUND_ERR);
return;
}
this._request = aRequest;
let prompt = this._getPrompt(this._getString("deviceMenu.title"),
this._getPromptMenu(this._devices));
this._showPrompt(prompt, this._selectDevice.bind(this));
UITelemetry.addEvent("show.1", "dialog", null, "prompt_device_selection");
},
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([PresentationDevicePrompt]);