91 lines
2.6 KiB
Plaintext
91 lines
2.6 KiB
Plaintext
/*
|
|
* Copyright 2020 Adobe. All rights reserved.
|
|
* This file is licensed to you under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License. You may obtain a copy
|
|
* of the License at http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software distributed under
|
|
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
|
|
* OF ANY KIND, either express or implied. See the License for the specific language
|
|
* governing permissions and limitations under the License.
|
|
*/
|
|
|
|
import {Direction} from '@react-types/shared';
|
|
import {isRTL} from './utils';
|
|
import {useEffect, useState} from 'react';
|
|
import {useIsSSR} from '@react-aria/ssr';
|
|
|
|
export interface Locale {
|
|
/** The [BCP47](https://www.ietf.org/rfc/bcp/bcp47.txt) language code for the locale. */
|
|
locale: string,
|
|
/** The writing direction for the locale. */
|
|
direction: Direction
|
|
}
|
|
|
|
// Locale passed from server by PackageLocalizationProvider.
|
|
const localeSymbol = Symbol.for('react-aria.i18n.locale');
|
|
|
|
/**
|
|
* Gets the locale setting of the browser.
|
|
*/
|
|
export function getDefaultLocale(): Locale {
|
|
let locale = typeof window !== 'undefined' && window[localeSymbol]
|
|
// @ts-ignore
|
|
|| (typeof navigator !== 'undefined' && (navigator.language || navigator.userLanguage))
|
|
|| 'en-US';
|
|
|
|
try {
|
|
Intl.DateTimeFormat.supportedLocalesOf([locale]);
|
|
} catch {
|
|
locale = 'en-US';
|
|
}
|
|
return {
|
|
locale,
|
|
direction: isRTL(locale) ? 'rtl' : 'ltr'
|
|
};
|
|
}
|
|
|
|
let currentLocale = getDefaultLocale();
|
|
let listeners = new Set<(locale: Locale) => void>();
|
|
|
|
function updateLocale() {
|
|
currentLocale = getDefaultLocale();
|
|
for (let listener of listeners) {
|
|
listener(currentLocale);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the current browser/system language, and updates when it changes.
|
|
*/
|
|
export function useDefaultLocale(): Locale {
|
|
let isSSR = useIsSSR();
|
|
let [defaultLocale, setDefaultLocale] = useState(currentLocale);
|
|
|
|
useEffect(() => {
|
|
if (listeners.size === 0) {
|
|
window.addEventListener('languagechange', updateLocale);
|
|
}
|
|
|
|
listeners.add(setDefaultLocale);
|
|
|
|
return () => {
|
|
listeners.delete(setDefaultLocale);
|
|
if (listeners.size === 0) {
|
|
window.removeEventListener('languagechange', updateLocale);
|
|
}
|
|
};
|
|
}, []);
|
|
|
|
// We cannot determine the browser's language on the server, so default to
|
|
// en-US. This will be updated after hydration on the client to the correct value.
|
|
if (isSSR) {
|
|
return {
|
|
locale: 'en-US',
|
|
direction: 'ltr'
|
|
};
|
|
}
|
|
|
|
return defaultLocale;
|
|
}
|