54 lines
1.7 KiB
JavaScript
54 lines
1.7 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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module.metadata = {
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"stability": "unstable"
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};
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const { EventTarget } = require("../event/target");
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const { emit } = require("../event/core");
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const { WindowTracker, windowIterator } = require("../deprecated/window-utils");
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const { DOMEventAssembler } = require("../deprecated/events/assembler");
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const { Class } = require("../core/heritage");
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const { Cu } = require("chrome");
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// Event emitter objects used to register listeners and emit events on them
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// when they occur.
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const Observer = Class({
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initialize() {
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// Using `WindowTracker` to track window events.
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WindowTracker({
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onTrack: chromeWindow => {
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emit(this, "open", chromeWindow);
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this.observe(chromeWindow);
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},
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onUntrack: chromeWindow => {
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emit(this, "close", chromeWindow);
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this.ignore(chromeWindow);
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}
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});
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},
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implements: [EventTarget, DOMEventAssembler],
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/**
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* Events that are supported and emitted by the module.
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*/
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supportedEventsTypes: [ "activate", "deactivate" ],
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/**
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* Function handles all the supported events on all the windows that are
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* observed. Method is used to proxy events to the listeners registered on
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* this event emitter.
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* @param {Event} event
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* Keyboard event being emitted.
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*/
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handleEvent(event) {
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// Ignore events from windows in the child process as they can't be top-level
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if (Cu.isCrossProcessWrapper(event.target))
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return;
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emit(this, event.type, event.target, event);
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}
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});
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exports.observer = new Observer();
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