63 lines
1.8 KiB
Dart
63 lines
1.8 KiB
Dart
import 'package:flutter/material.dart';
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import 'strings/zh_cn.dart';
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import 'strings/zh_tw.dart';
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import 'strings/en.dart';
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import 'strings/ja.dart';
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/// Genex 多语言支持
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///
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/// 使用方式: context.t('key') 或 AppLocalizations.of(context).get('key')
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/// 支持语言: zh_CN(默认), zh_TW, en, ja
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class AppLocalizations {
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final Locale locale;
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late final Map<String, String> _strings;
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AppLocalizations(this.locale) {
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final key = locale.countryCode != null && locale.countryCode!.isNotEmpty
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? '${locale.languageCode}_${locale.countryCode}'
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: locale.languageCode;
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_strings = _allStrings[key] ?? _allStrings[locale.languageCode] ?? zhCN;
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}
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static AppLocalizations of(BuildContext context) {
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return Localizations.of<AppLocalizations>(context, AppLocalizations)!;
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}
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/// 获取翻译字符串，找不到时 fallback 到中文，再找不到返回 key
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String get(String key) => _strings[key] ?? zhCN[key] ?? key;
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static const Map<String, Map<String, String>> _allStrings = {
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'zh': zhCN,
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'zh_CN': zhCN,
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'zh_TW': zhTW,
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'en': en,
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'ja': ja,
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};
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}
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/// LocalizationsDelegate
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class AppLocalizationsDelegate extends LocalizationsDelegate<AppLocalizations> {
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const AppLocalizationsDelegate();
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@override
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bool isSupported(Locale locale) {
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return ['zh', 'en', 'ja'].contains(locale.languageCode);
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}
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@override
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Future<AppLocalizations> load(Locale locale) async {
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return AppLocalizations(locale);
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}
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@override
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bool shouldReload(covariant LocalizationsDelegate<AppLocalizations> old) =>
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false;
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}
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/// BuildContext 扩展，快捷访问翻译
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extension AppLocalizationsExtension on BuildContext {
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/// 快捷翻译: context.t('key')
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String t(String key) => AppLocalizations.of(this).get(key);
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}
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