101 lines
3.7 KiB
Dart
101 lines
3.7 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter_bloc/flutter_bloc.dart';
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import 'package:maibu_satabot_v2/core/localization/locale_cubit.dart';
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/// 可选语言项：tag 对应 assets/languages/{tag}.json，nativeName 用该语言本地写法展示。
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class LanguageItem {
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final Locale locale;
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final String nativeName;
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const LanguageItem(this.locale, this.nativeName);
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String get tag => locale.countryCode == null || locale.countryCode!.isEmpty
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? locale.languageCode
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: '${locale.languageCode}-${locale.countryCode}';
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}
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/// 全局唯一的“可选语言列表”来源。
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/// 后续接入“接口下载语言包”时，只需在这里扩展（例如把已下载的语言追加进来），
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/// 登录强制弹窗与设置页入口都会自动同步，无需改多处。
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class AppLanguages {
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AppLanguages._();
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static final AppLanguages instance = AppLanguages._();
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final List<LanguageItem> items = const [
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LanguageItem(Locale('zh', 'CN'), '简体中文'),
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LanguageItem(Locale('en', 'US'), 'English'),
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];
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String nameOf(Locale locale) {
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final tag = locale.countryCode == null || locale.countryCode!.isEmpty
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? locale.languageCode
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: '${locale.languageCode}-${locale.countryCode}';
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for (final item in items) {
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if (item.tag == tag) return item.nativeName;
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}
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return tag;
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}
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}
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/// 语言选择弹窗。
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/// [mandatory] = true：登录时强制弹出，拦截系统返回键；可点某个语言即时切换，或点“继续”确认当前默认语言后关闭。
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/// [mandatory] = false：设置页中普通选择，可取消。
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class LanguageSelectionDialog extends StatelessWidget {
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final bool mandatory;
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const LanguageSelectionDialog({super.key, this.mandatory = true});
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Future<void> _onSelect(BuildContext context, Locale locale) async {
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await context.read<LocaleCubit>().setLocale(locale);
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if (context.mounted) Navigator.of(context).pop();
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}
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/// “继续”：不改变当前（默认）语言，仅确认已选并关闭，后续启动不再弹。
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Future<void> _onContinue(BuildContext context, Locale current) async {
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await context.read<LocaleCubit>().setLocale(current);
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if (context.mounted) Navigator.of(context).pop();
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}
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@override
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Widget build(BuildContext context) {
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final current = context.select<LocaleCubit, Locale>(
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(c) => c.state,
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);
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return PopScope(
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// 强制弹窗时拦截返回键，必须选一个才能继续使用
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canPop: !mandatory,
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child: AlertDialog(
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title: const Text('选择语言 / Select Language'),
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content: SizedBox(
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width: 300,
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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for (final item in AppLanguages.instance.items)
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RadioListTile<String>(
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value: item.tag,
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// 高亮当前语言：按 languageCode 匹配，兼容国家码为空的历史值
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groupValue: current.countryCode == null ||
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current.countryCode!.isEmpty
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? current.languageCode
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: '${current.languageCode}-${current.countryCode}',
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title: Text(item.nativeName),
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onChanged: (_) => _onSelect(context, item.locale),
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),
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],
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),
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),
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actions: [
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// 强制弹窗：提供“继续”出口，保持当前默认语言并确认后关闭；非强制：取消
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TextButton(
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onPressed: () => mandatory
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? _onContinue(context, current)
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: Navigator.of(context).pop(),
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child: Text(mandatory ? '继续 / Continue' : '取消'),
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),
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],
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),
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);
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}
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}
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