95 lines
2.6 KiB
JavaScript
95 lines
2.6 KiB
JavaScript
/* Copyright 2017 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/** @typedef {import("./interfaces").IL10n} IL10n */
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import { FluentBundle, FluentResource } from "fluent-bundle";
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import { DOMLocalization } from "fluent-dom";
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import { fetchData } from "pdfjs-lib";
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import { L10n } from "./l10n.js";
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/**
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* @implements {IL10n}
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*/
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class GenericL10n extends L10n {
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constructor(lang) {
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super({ lang });
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this._setL10n(
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new DOMLocalization(
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[],
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GenericL10n.#generateBundles.bind(
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GenericL10n,
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"en-us",
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this.getLanguage()
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)
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)
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);
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}
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/**
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* Generate the bundles for Fluent.
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* @param {String} defaultLang - The fallback language to use for
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* translations.
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* @param {String} baseLang - The base language to use for translations.
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*/
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static async *#generateBundles(defaultLang, baseLang) {
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const { baseURL, paths } = await this.#getPaths();
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const langs = [baseLang];
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if (defaultLang !== baseLang) {
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// Also fallback to the short-format of the base language
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// (see issue 17269).
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const shortLang = baseLang.split("-", 1)[0];
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if (shortLang !== baseLang) {
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langs.push(shortLang);
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}
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langs.push(defaultLang);
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}
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for (const lang of langs) {
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const bundle = await this.#createBundle(lang, baseURL, paths);
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if (bundle) {
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yield bundle;
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}
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}
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}
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static async #createBundle(lang, baseURL, paths) {
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const path = paths[lang];
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if (!path) {
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return null;
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}
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const url = new URL(path, baseURL);
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const text = await fetchData(url, /* type = */ "text");
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const resource = new FluentResource(text);
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const bundle = new FluentBundle(lang);
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const errors = bundle.addResource(resource);
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if (errors.length) {
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console.error("L10n errors", errors);
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}
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return bundle;
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}
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static async #getPaths() {
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const { href } = document.querySelector(`link[type="application/l10n"]`);
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const paths = await fetchData(href, /* type = */ "json");
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return { baseURL: href.replace(/[^/]*$/, "") || "./", paths };
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}
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}
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export { GenericL10n };
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