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/* 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/. */
import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
EventEmitter: "resource://gre/modules/EventEmitter.sys.mjs",
Log: "chrome://remote/content/shared/Log.sys.mjs",
});
XPCOMUtils.defineLazyGetter(lazy, "logger", () =>
lazy.Log.get(lazy.Log.TYPES.MARIONETTE)
);
// Singleton to allow forwarding events to registered listeners.
export const EventDispatcher = {
init() {
lazy.EventEmitter.decorate(this);
},
};
EventDispatcher.init();
export class MarionetteEventsParent extends JSWindowActorParent {
async receiveMessage(msg) {
const { name, data } = msg;
let rv;
switch (name) {
case "MarionetteEventsChild:PageLoadEvent":
EventDispatcher.emit("page-load", data);
break;
}
return rv;
}
}
// Flag to check if the MarionetteEvents actors have already been registed.
let eventsActorRegistered = false;
/**
* Register Events actors to listen for page load events via EventDispatcher.
*/
function registerEventsActor() {
if (eventsActorRegistered) {
return;
}
try {
// Register the JSWindowActor pair for events as used by Marionette
ChromeUtils.registerWindowActor("MarionetteEvents", {
kind: "JSWindowActor",
parent: {
esModuleURI:
"chrome://remote/content/marionette/actors/MarionetteEventsParent.sys.mjs",
},
child: {
esModuleURI:
"chrome://remote/content/marionette/actors/MarionetteEventsChild.sys.mjs",
events: {
beforeunload: { capture: true },
DOMContentLoaded: { mozSystemGroup: true },
hashchange: { mozSystemGroup: true },
pagehide: { mozSystemGroup: true },
pageshow: { mozSystemGroup: true },
// popstate doesn't bubble, as such use capturing phase
popstate: { capture: true, mozSystemGroup: true },
click: {},
dblclick: {},
unload: { capture: true, createActor: false },
},
},
allFrames: true,
includeChrome: true,
});
eventsActorRegistered = true;
} catch (e) {
if (e.name === "NotSupportedError") {
lazy.logger.warn(`MarionetteEvents actor is already registered!`);
} else {
throw e;
}
}
}
/**
* Enable MarionetteEvents actors to start forwarding page load events from the
* child actor to the parent actor. Register the MarionetteEvents actor if necessary.
*/
export function enableEventsActor() {
// sharedData is replicated across processes and will be checked by
// MarionetteEventsChild before forward events to the parent actor.
Services.ppmm.sharedData.set("MARIONETTE_EVENTS_ENABLED", true);
// Request to immediately flush the data to the content processes to avoid races.
Services.ppmm.sharedData.flush();
registerEventsActor();
}
/**
* Disable MarionetteEvents actors to stop forwarding page load events from the
* child actor to the parent actor.
*/
export function disableEventsActor() {
Services.ppmm.sharedData.set("MARIONETTE_EVENTS_ENABLED", false);
Services.ppmm.sharedData.flush();
}
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