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124 lines
4.2 KiB
Plaintext
124 lines
4.2 KiB
Plaintext
/*
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* Copyright 2022 Adobe. All rights reserved.
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* This file is licensed to you 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. You may obtain a copy
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* of the License at 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 distributed under
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* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
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* OF ANY KIND, either express or implied. See the License for the specific language
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* governing permissions and limitations under the License.
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*/
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import type {LocalizedString} from './LocalizedStringFormatter';
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export type LocalizedStrings<K extends string, T extends LocalizedString> = {
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[lang: string]: Record<K, T>
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};
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const localeSymbol = Symbol.for('react-aria.i18n.locale');
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const stringsSymbol = Symbol.for('react-aria.i18n.strings');
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let cachedGlobalStrings: {[packageName: string]: LocalizedStringDictionary<any, any>} | null | undefined = undefined;
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/**
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* Stores a mapping of localized strings. Can be used to find the
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* closest available string for a given locale.
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*/
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export class LocalizedStringDictionary<K extends string = string, T extends LocalizedString = string> {
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private strings: LocalizedStrings<K, T>;
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private defaultLocale: string;
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constructor(messages: LocalizedStrings<K, T>, defaultLocale: string = 'en-US') {
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// Clone messages so we don't modify the original object.
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// Filter out entries with falsy values which may have been caused by applying optimize-locales-plugin.
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this.strings = Object.fromEntries(
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Object.entries(messages).filter(([, v]) => v)
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);
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this.defaultLocale = defaultLocale;
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}
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/** Returns a localized string for the given key and locale. */
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getStringForLocale(key: K, locale: string): T {
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let strings = this.getStringsForLocale(locale);
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let string = strings[key];
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if (!string) {
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throw new Error(`Could not find intl message ${key} in ${locale} locale`);
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}
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return string;
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}
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/** Returns all localized strings for the given locale. */
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getStringsForLocale(locale: string): Record<K, T> {
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let strings = this.strings[locale];
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if (!strings) {
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strings = getStringsForLocale(locale, this.strings, this.defaultLocale);
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this.strings[locale] = strings;
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}
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return strings;
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}
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static getGlobalDictionaryForPackage<K extends string = string, T extends LocalizedString = string>(packageName: string): LocalizedStringDictionary<K, T> | null {
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if (typeof window === 'undefined') {
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return null;
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}
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let locale = window[localeSymbol];
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if (cachedGlobalStrings === undefined) {
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let globalStrings = window[stringsSymbol];
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if (!globalStrings) {
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return null;
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}
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cachedGlobalStrings = {};
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for (let pkg in globalStrings) {
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cachedGlobalStrings[pkg] = new LocalizedStringDictionary({[locale]: globalStrings[pkg]}, locale);
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}
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}
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let dictionary = cachedGlobalStrings?.[packageName];
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if (!dictionary) {
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throw new Error(`Strings for package "${packageName}" were not included by LocalizedStringProvider. Please add it to the list passed to createLocalizedStringDictionary.`);
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}
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return dictionary;
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}
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}
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function getStringsForLocale<K extends string, T extends LocalizedString>(locale: string, strings: LocalizedStrings<K, T>, defaultLocale = 'en-US') {
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// If there is an exact match, use it.
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if (strings[locale]) {
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return strings[locale];
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}
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// Attempt to find the closest match by language.
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// For example, if the locale is fr-CA (French Canadian), but there is only
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// an fr-FR (France) set of strings, use that.
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// This could be replaced with Intl.LocaleMatcher once it is supported.
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// https://github.com/tc39/proposal-intl-localematcher
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let language = getLanguage(locale);
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if (strings[language]) {
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return strings[language];
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}
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for (let key in strings) {
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if (key.startsWith(language + '-')) {
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return strings[key];
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}
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}
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// Nothing close, use english.
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return strings[defaultLocale];
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}
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function getLanguage(locale: string) {
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// @ts-ignore
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if (Intl.Locale) {
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// @ts-ignore
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return new Intl.Locale(locale).language;
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}
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return locale.split('-')[0];
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}
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