gecko-dev/browser/modules/ContentObservers.js
Victor Porof af7d1d3b67 Bug 1561435 - Format browser/modules/, a=automatic-formatting
# ignore-this-changeset

Differential Revision: https://phabricator.services.mozilla.com/D36046

--HG--
extra : source : f3c632037a1064c41b1f8b02f477c854b2fb4362
2019-07-05 09:55:19 +02:00

75 lines
2.2 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/. */
/**
* This process script is for small observers that we want to register
* once per content process, usually in order to forward content-based
* observer service notifications to the chrome process through
* message passing. Using a process script avoids having them in
* content.js and thereby registering N observers for N open tabs,
* which is bad for perf.
*/
"use strict";
const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
ChromeUtils.defineModuleGetter(
this,
"WebRTCChild",
"resource:///actors/WebRTCChild.jsm"
);
var gEMEUIObserver = function(subject, topic, data) {
let win = subject.top;
let mm = getMessageManagerForWindow(win);
if (mm) {
mm.sendAsyncMessage("EMEVideo:ContentMediaKeysRequest", data);
}
};
var gDecoderDoctorObserver = function(subject, topic, data) {
let win = subject.top;
let mm = getMessageManagerForWindow(win);
if (mm) {
mm.sendAsyncMessage("DecoderDoctor:Notification", data);
}
};
function getMessageManagerForWindow(aContentWindow) {
return aContentWindow.docShell.messageManager;
}
Services.obs.addObserver(gEMEUIObserver, "mediakeys-request");
Services.obs.addObserver(gDecoderDoctorObserver, "decoder-doctor-notification");
// WebRTCChild observer registration.
const kWebRTCObserverTopics = [
"getUserMedia:request",
"recording-device-stopped",
"PeerConnection:request",
"recording-device-events",
"recording-window-ended",
];
function webRTCObserve(aSubject, aTopic, aData) {
WebRTCChild.observe(aSubject, aTopic, aData);
}
for (let topic of kWebRTCObserverTopics) {
Services.obs.addObserver(webRTCObserve, topic);
}
if (Services.appinfo.processType == Services.appinfo.PROCESS_TYPE_CONTENT) {
Services.obs.addObserver(processShutdown, "content-child-shutdown");
}
function processShutdown() {
for (let topic of kWebRTCObserverTopics) {
Services.obs.removeObserver(webRTCObserve, topic);
}
Services.obs.removeObserver(processShutdown, "content-child-shutdown");
}