gecko-dev/b2g/components/PresentationRequestUIGlue.js

68 lines
2.0 KiB
JavaScript

/* 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"
function debug(aMsg) {
//dump("-*- PresentationRequestUIGlue: " + aMsg + "\n");
}
const { interfaces: Ci, utils: Cu, classes: Cc } = Components;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "SystemAppProxy",
"resource://gre/modules/SystemAppProxy.jsm");
function PresentationRequestUIGlue() {
// This is to store the session ID / resolver binding.
// An example of the object literal is shown below:
//
// {
// "sessionId1" : resolver1,
// ...
// }
this._resolvers = {};
// Listen to the result for the opened iframe from front-end.
SystemAppProxy.addEventListener("mozPresentationContentEvent", aEvent => {
let detail = aEvent.detail;
if (detail.type != "presentation-receiver-launched") {
return;
}
let sessionId = detail.id;
let resolver = this._resolvers[sessionId];
if (!resolver) {
debug("No correspondent resolver for session ID: " + sessionId);
return;
}
delete this._resolvers[sessionId];
resolver(detail.frame);
});
}
PresentationRequestUIGlue.prototype = {
sendRequest: function(aUrl, aSessionId) {
return new Promise(function(aResolve, aReject) {
this._resolvers[aSessionId] = aResolve;
SystemAppProxy._sendCustomEvent("mozPresentationChromeEvent",
{ type: "presentation-launch-receiver",
url: aUrl,
id: aSessionId });
}.bind(this));
},
classID: Components.ID("{ccc8a839-0b64-422b-8a60-fb2af0e376d0}"),
QueryInterface: XPCOMUtils.generateQI([Ci.nsIPresentationRequestUIGlue])
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([PresentationRequestUIGlue]);