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Localizations delegates in flutter_web
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| import 'dart:async'; | |
| import 'package:flutter/foundation.dart'; | |
| import 'package:flutter/material.dart'; | |
| class S { | |
| const S(); | |
| static const SLocalizationsDelegate delegate = | |
| const SLocalizationsDelegate(); | |
| static S of(BuildContext context) => | |
| Localizations.of<S>(context, S); | |
| String get appTitle => "My Swell App"; | |
| } | |
| class en extends S { | |
| const en(); | |
| } | |
| class SLocalizationsDelegate extends LocalizationsDelegate<S> { | |
| const SLocalizationsDelegate(); | |
| List<Locale> get supportedLocales { | |
| return const <Locale>[ | |
| const Locale("en", ""), | |
| const Locale("en", "US"), | |
| ]; | |
| } | |
| LocaleResolutionCallback resolution({Locale fallback}) { | |
| return (Locale locale, Iterable<Locale> supported) { | |
| final Locale languageLocale = new Locale(locale.languageCode, ""); | |
| if (supported.contains(locale)) | |
| return locale; | |
| else if (supported.contains(languageLocale)) | |
| return languageLocale; | |
| else { | |
| final Locale fallbackLocale = fallback ?? supported.first; | |
| return fallbackLocale; | |
| } | |
| }; | |
| } | |
| @override | |
| Future<S> load(Locale locale) { | |
| final String lang = getLang(locale); | |
| switch (lang) { | |
| case "en": | |
| case "en_US": | |
| return new SynchronousFuture<S>(const en()); | |
| default: | |
| return new SynchronousFuture<S>(const S()); | |
| } | |
| } | |
| @override | |
| bool isSupported(Locale locale) => supportedLocales.contains(locale); | |
| @override | |
| bool shouldReload(SLocalizationsDelegate old) => false; // when we support a second locale, this should be changed | |
| } | |
| String getLang(Locale l) => l.countryCode != null && l.countryCode.isEmpty | |
| ? l.languageCode | |
| : l.toString(); |
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