75 lines
1.8 KiB
Dart
75 lines
1.8 KiB
Dart
import 'package:flutter/material.dart';
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/// 全局语言状态管理
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///
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/// userLocale = null 时跟随系统语言
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/// 用户在设置页选择后，设置为具体 Locale
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class LocaleManager {
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static final ValueNotifier<Locale?> userLocale = ValueNotifier(null);
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static const supportedLocales = [
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Locale('zh', 'CN'),
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Locale('zh', 'TW'),
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Locale('en'),
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Locale('ja'),
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];
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/// 根据系统 locale 解析最佳匹配
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static Locale resolve(List<Locale>? systemLocales, Iterable<Locale> supported) {
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if (systemLocales == null || systemLocales.isEmpty) {
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return const Locale('zh', 'CN');
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}
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final system = systemLocales.first;
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// 精确匹配
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for (final s in supported) {
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if (s.languageCode == system.languageCode &&
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s.countryCode == system.countryCode) {
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return s;
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}
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}
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// 语言码匹配
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for (final s in supported) {
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if (s.languageCode == system.languageCode) {
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return s;
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}
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}
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// 默认中文
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return const Locale('zh', 'CN');
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}
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/// 根据语言获取默认货币
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static String defaultCurrencyForLocale(Locale locale) {
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switch (locale.languageCode) {
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case 'zh':
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return locale.countryCode == 'TW' ? 'TWD' : 'CNY';
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case 'ja':
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return 'JPY';
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case 'en':
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default:
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return 'USD';
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}
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}
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/// Locale 转显示名称
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static String localeDisplayName(Locale locale) {
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final key = '${locale.languageCode}_${locale.countryCode ?? ''}';
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switch (key) {
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case 'zh_CN':
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return '简体中文';
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case 'zh_TW':
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return '繁體中文';
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case 'en_':
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case 'en_US':
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return 'English';
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case 'ja_':
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case 'ja_JP':
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return '日本語';
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default:
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return locale.toString();
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}
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}
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}
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