The Tor Browser / file comparison
comparison: addon-sdk/source/lib/sdk/windows/observer.js
addon-sdk/source/lib/sdk/windows/observer.js
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 "use strict"; | |
| 5 | |
| 6 module.metadata = { | |
| 7 "stability": "unstable" | |
| 8 }; | |
| 9 | |
| 10 const { EventEmitterTrait: EventEmitter } = require("../deprecated/events"); | |
| 11 const { WindowTracker, windowIterator } = require("../deprecated/window-utils"); | |
| 12 const { DOMEventAssembler } = require("../deprecated/events/assembler"); | |
| 13 const { Trait } = require("../deprecated/light-traits"); | |
| 14 | |
| 15 // Event emitter objects used to register listeners and emit events on them | |
| 16 // when they occur. | |
| 17 const observer = Trait.compose(DOMEventAssembler, EventEmitter).create({ | |
| 18 /** | |
| 19 * Method is implemented by `EventEmitter` and is used just for emitting | |
| 20 * events on registered listeners. | |
| 21 */ | |
| 22 _emit: Trait.required, | |
| 23 /** | |
| 24 * Events that are supported and emitted by the module. | |
| 25 */ | |
| 26 supportedEventsTypes: [ "activate", "deactivate" ], | |
| 27 /** | |
| 28 * Function handles all the supported events on all the windows that are | |
| 29 * observed. Method is used to proxy events to the listeners registered on | |
| 30 * this event emitter. | |
| 31 * @param {Event} event | |
| 32 * Keyboard event being emitted. | |
| 33 */ | |
| 34 handleEvent: function handleEvent(event) { | |
| 35 this._emit(event.type, event.target, event); | |
| 36 } | |
| 37 }); | |
| 38 | |
| 39 // Using `WindowTracker` to track window events. | |
| 40 WindowTracker({ | |
| 41 onTrack: function onTrack(chromeWindow) { | |
| 42 observer._emit("open", chromeWindow); | |
| 43 observer.observe(chromeWindow); | |
| 44 }, | |
| 45 onUntrack: function onUntrack(chromeWindow) { | |
| 46 observer._emit("close", chromeWindow); | |
| 47 observer.ignore(chromeWindow); | |
| 48 } | |
| 49 }); | |
| 50 | |
| 51 exports.observer = observer; |
