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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/. */
"use strict";
module.metadata = {
"stability": "unstable"
};
const { EventTarget } = require("../event/target");
const { emit } = require("../event/core");
const { WindowTracker, windowIterator } = require("../deprecated/window-utils");
const { DOMEventAssembler } = require("../deprecated/events/assembler");
const { Class } = require("../core/heritage");
const { Cu } = require("chrome");
// Event emitter objects used to register listeners and emit events on them
// when they occur.
const Observer = Class({
initialize() {
// Using `WindowTracker` to track window events.
WindowTracker({
onTrack: chromeWindow => {
emit(this, "open", chromeWindow);
this.observe(chromeWindow);
},
onUntrack: chromeWindow => {
emit(this, "close", chromeWindow);
this.ignore(chromeWindow);
}
});
},
implements: [EventTarget, DOMEventAssembler],
/**
* Events that are supported and emitted by the module.
*/
supportedEventsTypes: [ "activate", "deactivate" ],
/**
* Function handles all the supported events on all the windows that are
* observed. Method is used to proxy events to the listeners registered on
* this event emitter.
* @param {Event} event
* Keyboard event being emitted.
*/
handleEvent(event) {
// Ignore events from windows in the child process as they can't be top-level
if (Cu.isCrossProcessWrapper(event.target))
return;
emit(this, event.type, event.target, event);
}
});
exports.observer = new Observer();
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