зеркало из https://github.com/mozilla/gecko-dev.git
56 строки
1.5 KiB
JavaScript
56 строки
1.5 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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this.EXPORTED_SYMBOLS = ["LanguageDetector"];
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Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
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XPCOMUtils.defineLazyModuleGetter(this, "Promise",
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"resource://gre/modules/Promise.jsm");
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const WORKER_URL = "resource:///modules/translation/cld-worker.js";
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let detectionQueue = [];
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let workerReady = false;
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let pendingStrings = [];
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XPCOMUtils.defineLazyGetter(this, "worker", () => {
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let worker = new Worker(WORKER_URL);
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worker.onmessage = function(aMsg) {
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if (aMsg.data == "ready") {
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workerReady = true;
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for (let string of pendingStrings)
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worker.postMessage(string);
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pendingStrings = [];
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}
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else
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detectionQueue.shift().resolve(aMsg.data);
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}
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return worker;
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});
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this.LanguageDetector = {
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/**
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* Detect the language of a given string
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*
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* @returns {Promise}
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* @resolves When detection is finished, with a object containing
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* these fields:
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* - 'language' (string with a language code)
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* - 'confident' (boolean).
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*/
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detectLanguage: function(aString) {
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let deferred = Promise.defer();
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detectionQueue.push(deferred);
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if (worker && workerReady)
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worker.postMessage(aString);
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else
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pendingStrings.push(aString);
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return deferred.promise;
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}
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};
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