browser/components/translation/LanguageDetector.jsm@6474c204b198 (annotated)
browser/components/translation/LanguageDetector.jsm
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this file, |
| michael@0 | 3 | * You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | "use strict"; |
| michael@0 | 6 | |
| michael@0 | 7 | this.EXPORTED_SYMBOLS = ["LanguageDetector"]; |
| michael@0 | 8 | |
| michael@0 | 9 | Components.utils.import("resource://gre/modules/XPCOMUtils.jsm"); |
| michael@0 | 10 | |
| michael@0 | 11 | XPCOMUtils.defineLazyModuleGetter(this, "Promise", |
| michael@0 | 12 | "resource://gre/modules/Promise.jsm"); |
| michael@0 | 13 | |
| michael@0 | 14 | const WORKER_URL = "resource:///modules/translation/cld-worker.js"; |
| michael@0 | 15 | |
| michael@0 | 16 | let detectionQueue = []; |
| michael@0 | 17 | |
| michael@0 | 18 | let workerReady = false; |
| michael@0 | 19 | let pendingStrings = []; |
| michael@0 | 20 | |
| michael@0 | 21 | XPCOMUtils.defineLazyGetter(this, "worker", () => { |
| michael@0 | 22 | let worker = new Worker(WORKER_URL); |
| michael@0 | 23 | worker.onmessage = function(aMsg) { |
| michael@0 | 24 | if (aMsg.data == "ready") { |
| michael@0 | 25 | workerReady = true; |
| michael@0 | 26 | for (let string of pendingStrings) |
| michael@0 | 27 | worker.postMessage(string); |
| michael@0 | 28 | pendingStrings = []; |
| michael@0 | 29 | } |
| michael@0 | 30 | else |
| michael@0 | 31 | detectionQueue.shift().resolve(aMsg.data); |
| michael@0 | 32 | } |
| michael@0 | 33 | return worker; |
| michael@0 | 34 | }); |
| michael@0 | 35 | |
| michael@0 | 36 | this.LanguageDetector = { |
| michael@0 | 37 | /** |
| michael@0 | 38 | * Detect the language of a given string |
| michael@0 | 39 | * |
| michael@0 | 40 | * @returns {Promise} |
| michael@0 | 41 | * @resolves When detection is finished, with a object containing |
| michael@0 | 42 | * these fields: |
| michael@0 | 43 | * - 'language' (string with a language code) |
| michael@0 | 44 | * - 'confident' (boolean). |
| michael@0 | 45 | */ |
| michael@0 | 46 | detectLanguage: function(aString) { |
| michael@0 | 47 | let deferred = Promise.defer(); |
| michael@0 | 48 | detectionQueue.push(deferred); |
| michael@0 | 49 | if (worker && workerReady) |
| michael@0 | 50 | worker.postMessage(aString); |
| michael@0 | 51 | else |
| michael@0 | 52 | pendingStrings.push(aString); |
| michael@0 | 53 | return deferred.promise; |
| michael@0 | 54 | } |
| michael@0 | 55 | }; |
