packages/flutter_localizations/lib/src/cupertino_localizations.dart - external/github.com/flutter/flutter - Git at Google

 // Copyright 2014 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 import 'dart:async';

 import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
 import 'package:intl/intl.dart' as intl;

 import 'l10n/generated_cupertino_localizations.dart';
 import 'utils/date_localizations.dart' as util;
 import 'widgets_localizations.dart';

 /// Implementation of localized strings for Cupertino widgets using the `intl`
 /// package for date and time formatting.
 ///
 /// Further localization of strings beyond date time formatting are provided
 /// by language specific subclasses of [GlobalCupertinoLocalizations].
 ///
 /// ## Supported languages
 ///
 /// This class supports locales with the following [Locale.languageCode]s:
 ///
 /// {@macro flutter.localizations.cupertino.languages}
 ///
 /// This list is available programmatically via [kCupertinoSupportedLanguages].
 ///
 /// ## Sample code
 ///
 /// To include the localizations provided by this class in a [CupertinoApp],
 /// add [GlobalCupertinoLocalizations.delegates] to
 /// [CupertinoApp.localizationsDelegates], and specify the locales your
 /// app supports with [CupertinoApp.supportedLocales]:
 ///
 /// ```dart
 /// new CupertinoApp(
 ///   localizationsDelegates: GlobalCupertinoLocalizations.delegates,
 ///   supportedLocales: [
 ///     const Locale('en', 'US'), // American English
 ///     const Locale('he', 'IL'), // Israeli Hebrew
 ///     // ...
 ///   ],
 ///   // ...
 /// )
 /// ```
 ///
 /// See also:
 ///
 ///  * [DefaultCupertinoLocalizations], which provides US English localizations
 ///    for Cupertino widgets.
 abstract class GlobalCupertinoLocalizations implements CupertinoLocalizations {
   /// Initializes an object that defines the Cupertino widgets' localized
   /// strings for the given `localeName`.
   ///
   /// The remaining '*Format' arguments uses the intl package to provide
   /// [DateFormat] configurations for the `localeName`.
   const GlobalCupertinoLocalizations({
     @required String localeName,
     @required intl.DateFormat fullYearFormat,
     @required intl.DateFormat dayFormat,
     @required intl.DateFormat mediumDateFormat,
     @required intl.DateFormat singleDigitHourFormat,
     @required intl.DateFormat singleDigitMinuteFormat,
     @required intl.DateFormat doubleDigitMinuteFormat,
     @required intl.DateFormat singleDigitSecondFormat,
     @required intl.NumberFormat decimalFormat,
   }) : assert(localeName != null),
        _localeName = localeName,
        assert(fullYearFormat != null),
        _fullYearFormat = fullYearFormat,
        assert(dayFormat != null),
        _dayFormat = dayFormat,
        assert(mediumDateFormat != null),
        _mediumDateFormat = mediumDateFormat,
        assert(singleDigitHourFormat != null),
        _singleDigitHourFormat = singleDigitHourFormat,
        assert(singleDigitMinuteFormat != null),
        _singleDigitMinuteFormat = singleDigitMinuteFormat,
        assert(doubleDigitMinuteFormat != null),
        _doubleDigitMinuteFormat = doubleDigitMinuteFormat,
        assert(singleDigitSecondFormat != null),
        _singleDigitSecondFormat = singleDigitSecondFormat,
        assert(decimalFormat != null),
        _decimalFormat =decimalFormat;

   final String _localeName;
   final intl.DateFormat _fullYearFormat;
   final intl.DateFormat _dayFormat;
   final intl.DateFormat _mediumDateFormat;
   final intl.DateFormat _singleDigitHourFormat;
   final intl.DateFormat _singleDigitMinuteFormat;
   final intl.DateFormat _doubleDigitMinuteFormat;
   final intl.DateFormat _singleDigitSecondFormat;
   final intl.NumberFormat _decimalFormat;

   @override
   String datePickerYear(int yearIndex) {
     return _fullYearFormat.format(DateTime.utc(yearIndex));
   }

   @override
   String datePickerMonth(int monthIndex) {
     // It doesn't actually have anything to do with _fullYearFormat. It's just
     // taking advantage of the fact that _fullYearFormat loaded the needed
     // locale's symbols.
     return _fullYearFormat.dateSymbols.MONTHS[monthIndex - 1];
   }

   @override
   String datePickerDayOfMonth(int dayIndex) {
     // Year and month doesn't matter since we just want to day formatted.
     return _dayFormat.format(DateTime.utc(0, 0, dayIndex));
   }

   @override
   String datePickerMediumDate(DateTime date) {
     return _mediumDateFormat.format(date);
   }

   @override
   String datePickerHour(int hour) {
     return _singleDigitHourFormat.format(DateTime.utc(0, 0, 0, hour));
   }

   @override
   String datePickerMinute(int minute) {
     return _doubleDigitMinuteFormat.format(DateTime.utc(0, 0, 0, 0, minute));
   }

   /// Subclasses should provide the optional zero pluralization of [datePickerHourSemanticsLabel] based on the ARB file.
   @protected String get datePickerHourSemanticsLabelZero => null;
   /// Subclasses should provide the optional one pluralization of [datePickerHourSemanticsLabel] based on the ARB file.
   @protected String get datePickerHourSemanticsLabelOne => null;
   /// Subclasses should provide the optional two pluralization of [datePickerHourSemanticsLabel] based on the ARB file.
   @protected String get datePickerHourSemanticsLabelTwo => null;
   /// Subclasses should provide the optional few pluralization of [datePickerHourSemanticsLabel] based on the ARB file.
   @protected String get datePickerHourSemanticsLabelFew => null;
   /// Subclasses should provide the optional many pluralization of [datePickerHourSemanticsLabel] based on the ARB file.
   @protected String get datePickerHourSemanticsLabelMany => null;
   /// Subclasses should provide the required other pluralization of [datePickerHourSemanticsLabel] based on the ARB file.
   @protected String get datePickerHourSemanticsLabelOther;

   @override
   String datePickerHourSemanticsLabel(int hour) {
     return intl.Intl.pluralLogic(
       hour,
       zero: datePickerHourSemanticsLabelZero,
       one: datePickerHourSemanticsLabelOne,
       two: datePickerHourSemanticsLabelTwo,
       few: datePickerHourSemanticsLabelFew,
       many: datePickerHourSemanticsLabelMany,
       other: datePickerHourSemanticsLabelOther,
       locale: _localeName,
     ).replaceFirst(r'$hour', _decimalFormat.format(hour));
   }

   /// Subclasses should provide the optional zero pluralization of [datePickerMinuteSemanticsLabel] based on the ARB file.
   @protected String get datePickerMinuteSemanticsLabelZero => null;
   /// Subclasses should provide the optional one pluralization of [datePickerMinuteSemanticsLabel] based on the ARB file.
   @protected String get datePickerMinuteSemanticsLabelOne => null;
   /// Subclasses should provide the optional two pluralization of [datePickerMinuteSemanticsLabel] based on the ARB file.
   @protected String get datePickerMinuteSemanticsLabelTwo => null;
   /// Subclasses should provide the optional few pluralization of [datePickerMinuteSemanticsLabel] based on the ARB file.
   @protected String get datePickerMinuteSemanticsLabelFew => null;
   /// Subclasses should provide the optional many pluralization of [datePickerMinuteSemanticsLabel] based on the ARB file.
   @protected String get datePickerMinuteSemanticsLabelMany => null;
   /// Subclasses should provide the required other pluralization of [datePickerMinuteSemanticsLabel] based on the ARB file.
   @protected String get datePickerMinuteSemanticsLabelOther;

   @override
   String datePickerMinuteSemanticsLabel(int minute) {
     return intl.Intl.pluralLogic(
       minute,
       zero: datePickerMinuteSemanticsLabelZero,
       one: datePickerMinuteSemanticsLabelOne,
       two: datePickerMinuteSemanticsLabelTwo,
       few: datePickerMinuteSemanticsLabelFew,
       many: datePickerMinuteSemanticsLabelMany,
       other: datePickerMinuteSemanticsLabelOther,
       locale: _localeName,
     ).replaceFirst(r'$minute', _decimalFormat.format(minute));
   }

   /// A string describing the [DatePickerDateOrder] enum value.
   ///
   /// Subclasses should provide this string value based on the ARB file for
   /// the locale.
   ///
   /// See also:
   ///
   ///  * [datePickerDateOrder], which provides the [DatePickerDateOrder]
   ///    enum value for [CupertinoLocalizations] based on this string value
   @protected
   String get datePickerDateOrderString;

   @override
   DatePickerDateOrder get datePickerDateOrder {
     switch (datePickerDateOrderString) {
       case 'dmy':
         return DatePickerDateOrder.dmy;
       case 'mdy':
         return DatePickerDateOrder.mdy;
       case 'ymd':
         return DatePickerDateOrder.ymd;
       case 'ydm':
         return DatePickerDateOrder.ydm;
       default:
         assert(
           false,
           'Failed to load DatePickerDateOrder $datePickerDateOrderString for '
           "locale $_localeName.\nNon conforming string for $_localeName's "
           '.arb file',
         );
         return null;
     }
   }

   /// A string describing the [DatePickerDateTimeOrder] enum value.
   ///
   /// Subclasses should provide this string value based on the ARB file for
   /// the locale.
   ///
   /// See also:
   ///
   ///  * [datePickerDateTimeOrder], which provides the [DatePickerDateTimeOrder]
   ///    enum value for [CupertinoLocalizations] based on this string value.
   @protected
   String get datePickerDateTimeOrderString;

   @override
   DatePickerDateTimeOrder get datePickerDateTimeOrder {
     switch (datePickerDateTimeOrderString) {
       case 'date_time_dayPeriod':
         return DatePickerDateTimeOrder.date_time_dayPeriod;
       case 'date_dayPeriod_time':
         return DatePickerDateTimeOrder.date_dayPeriod_time;
       case 'time_dayPeriod_date':
         return DatePickerDateTimeOrder.time_dayPeriod_date;
       case 'dayPeriod_time_date':
         return DatePickerDateTimeOrder.dayPeriod_time_date;
       default:
         assert(
           false,
           'Failed to load DatePickerDateTimeOrder $datePickerDateTimeOrderString '
           "for locale $_localeName.\nNon conforming string for $_localeName's "
           '.arb file',
         );
         return null;
     }
   }

   /// The raw version of [tabSemanticsLabel], with `$tabIndex` and `$tabCount` verbatim
   /// in the string.
   @protected
   String get tabSemanticsLabelRaw;

   @override
   String tabSemanticsLabel({ int tabIndex, int tabCount }) {
     assert(tabIndex >= 1);
     assert(tabCount >= 1);
     final String template = tabSemanticsLabelRaw;
     return template
       .replaceFirst(r'$tabIndex', _decimalFormat.format(tabIndex))
       .replaceFirst(r'$tabCount', _decimalFormat.format(tabCount));
   }

   @override
   String timerPickerHour(int hour) {
     return _singleDigitHourFormat.format(DateTime.utc(0, 0, 0, hour));
   }

   @override
   String timerPickerMinute(int minute) {
     return _singleDigitMinuteFormat.format(DateTime.utc(0, 0, 0, 0, minute));
   }

   @override
   String timerPickerSecond(int second) {
     return _singleDigitSecondFormat.format(DateTime.utc(0, 0, 0, 0, 0, second));
   }

   /// Subclasses should provide the optional zero pluralization of [timerPickerHourLabel] based on the ARB file.
   @protected String get timerPickerHourLabelZero => null;
   /// Subclasses should provide the optional one pluralization of [timerPickerHourLabel] based on the ARB file.
   @protected String get timerPickerHourLabelOne => null;
   /// Subclasses should provide the optional two pluralization of [timerPickerHourLabel] based on the ARB file.
   @protected String get timerPickerHourLabelTwo => null;
   /// Subclasses should provide the optional few pluralization of [timerPickerHourLabel] based on the ARB file.
   @protected String get timerPickerHourLabelFew => null;
   /// Subclasses should provide the optional many pluralization of [timerPickerHourLabel] based on the ARB file.
   @protected String get timerPickerHourLabelMany => null;
   /// Subclasses should provide the required other pluralization of [timerPickerHourLabel] based on the ARB file.
   @protected String get timerPickerHourLabelOther;

   @override
   String timerPickerHourLabel(int hour) {
     return intl.Intl.pluralLogic(
       hour,
       zero: timerPickerHourLabelZero,
       one: timerPickerHourLabelOne,
       two: timerPickerHourLabelTwo,
       few: timerPickerHourLabelFew,
       many: timerPickerHourLabelMany,
       other: timerPickerHourLabelOther,
       locale: _localeName,
     ).replaceFirst(r'$hour', _decimalFormat.format(hour));
   }

   /// Subclasses should provide the optional zero pluralization of [timerPickerMinuteLabel] based on the ARB file.
   @protected String get timerPickerMinuteLabelZero => null;
   /// Subclasses should provide the optional one pluralization of [timerPickerMinuteLabel] based on the ARB file.
   @protected String get timerPickerMinuteLabelOne => null;
   /// Subclasses should provide the optional two pluralization of [timerPickerMinuteLabel] based on the ARB file.
   @protected String get timerPickerMinuteLabelTwo => null;
   /// Subclasses should provide the optional few pluralization of [timerPickerMinuteLabel] based on the ARB file.
   @protected String get timerPickerMinuteLabelFew => null;
   /// Subclasses should provide the optional many pluralization of [timerPickerMinuteLabel] based on the ARB file.
   @protected String get timerPickerMinuteLabelMany => null;
   /// Subclasses should provide the required other pluralization of [timerPickerMinuteLabel] based on the ARB file.
   @protected String get timerPickerMinuteLabelOther;

   @override
   String timerPickerMinuteLabel(int minute) {
     return intl.Intl.pluralLogic(
       minute,
       zero: timerPickerMinuteLabelZero,
       one: timerPickerMinuteLabelOne,
       two: timerPickerMinuteLabelTwo,
       few: timerPickerMinuteLabelFew,
       many: timerPickerMinuteLabelMany,
       other: timerPickerMinuteLabelOther,
       locale: _localeName,
     ).replaceFirst(r'$minute', _decimalFormat.format(minute));
   }

   /// Subclasses should provide the optional zero pluralization of [timerPickerSecondLabel] based on the ARB file.
   @protected String get timerPickerSecondLabelZero => null;
   /// Subclasses should provide the optional one pluralization of [timerPickerSecondLabel] based on the ARB file.
   @protected String get timerPickerSecondLabelOne => null;
   /// Subclasses should provide the optional two pluralization of [timerPickerSecondLabel] based on the ARB file.
   @protected String get timerPickerSecondLabelTwo => null;
   /// Subclasses should provide the optional few pluralization of [timerPickerSecondLabel] based on the ARB file.
   @protected String get timerPickerSecondLabelFew => null;
   /// Subclasses should provide the optional many pluralization of [timerPickerSecondLabel] based on the ARB file.
   @protected String get timerPickerSecondLabelMany => null;
   /// Subclasses should provide the required other pluralization of [timerPickerSecondLabel] based on the ARB file.
   @protected String get timerPickerSecondLabelOther;

   @override
   String timerPickerSecondLabel(int second) {
     return intl.Intl.pluralLogic(
       second,
       zero: timerPickerSecondLabelZero,
       one: timerPickerSecondLabelOne,
       two: timerPickerSecondLabelTwo,
       few: timerPickerSecondLabelFew,
       many: timerPickerSecondLabelMany,
       other: timerPickerSecondLabelOther,
       locale: _localeName,
     ).replaceFirst(r'$second', _decimalFormat.format(second));
   }

   /// A [LocalizationsDelegate] for [CupertinoLocalizations].
   ///
   /// Most internationalized apps will use [GlobalCupertinoLocalizations.delegates]
   /// as the value of [CupertinoApp.localizationsDelegates] to include
   /// the localizations for both the cupertino and widget libraries.
   static const LocalizationsDelegate<CupertinoLocalizations> delegate = _GlobalCupertinoLocalizationsDelegate();

   /// A value for [CupertinoApp.localizationsDelegates] that's typically used by
   /// internationalized apps.
   ///
   /// ## Sample code
   ///
   /// To include the localizations provided by this class and by
   /// [GlobalWidgetsLocalizations] in a [CupertinoApp],
   /// use [GlobalCupertinoLocalizations.delegates] as the value of
   /// [CupertinoApp.localizationsDelegates], and specify the locales your
   /// app supports with [CupertinoApp.supportedLocales]:
   ///
   /// ```dart
   /// new CupertinoApp(
   ///   localizationsDelegates: GlobalCupertinoLocalizations.delegates,
   ///   supportedLocales: [
   ///     const Locale('en', 'US'), // English
   ///     const Locale('he', 'IL'), // Hebrew
   ///   ],
   ///   // ...
   /// )
   /// ```
   static const List<LocalizationsDelegate<dynamic>> delegates = <LocalizationsDelegate<dynamic>>[
     GlobalCupertinoLocalizations.delegate,
     GlobalWidgetsLocalizations.delegate,
   ];
 }

 class _GlobalCupertinoLocalizationsDelegate extends LocalizationsDelegate<CupertinoLocalizations> {
   const _GlobalCupertinoLocalizationsDelegate();

   @override
   bool isSupported(Locale locale) => kCupertinoSupportedLanguages.contains(locale.languageCode);

   static final Map<Locale, Future<CupertinoLocalizations>> _loadedTranslations = <Locale, Future<CupertinoLocalizations>>{};

   @override
   Future<CupertinoLocalizations> load(Locale locale) {
     assert(isSupported(locale));
     return _loadedTranslations.putIfAbsent(locale, () {
       util.loadDateIntlDataIfNotLoaded();

       final String localeName = intl.Intl.canonicalizedLocale(locale.toString());
       assert(
         locale.toString() == localeName,
         'Flutter does not support the non-standard locale form $locale (which '
         'might be $localeName',
       );

       intl.DateFormat fullYearFormat;
       intl.DateFormat dayFormat;
       intl.DateFormat mediumDateFormat;
       // We don't want any additional decoration here. The am/pm is handled in
       // the date picker. We just want an hour number localized.
       intl.DateFormat singleDigitHourFormat;
       intl.DateFormat singleDigitMinuteFormat;
       intl.DateFormat doubleDigitMinuteFormat;
       intl.DateFormat singleDigitSecondFormat;
       intl.NumberFormat decimalFormat;

       void loadFormats(String locale) {
         fullYearFormat = intl.DateFormat.y(locale);
         dayFormat = intl.DateFormat.d(locale);
         mediumDateFormat = intl.DateFormat.MMMEd(locale);
         // TODO(xster): fix when https://github.com/dart-lang/intl/issues/207 is resolved.
         singleDigitHourFormat = intl.DateFormat('HH', locale);
         singleDigitMinuteFormat = intl.DateFormat.m(locale);
         doubleDigitMinuteFormat = intl.DateFormat('mm', locale);
         singleDigitSecondFormat = intl.DateFormat.s(locale);
         decimalFormat = intl.NumberFormat.decimalPattern(locale);
       }

       if (intl.DateFormat.localeExists(localeName)) {
         loadFormats(localeName);
       } else if (intl.DateFormat.localeExists(locale.languageCode)) {
         loadFormats(locale.languageCode);
       } else {
         loadFormats(null);
       }

       return SynchronousFuture<CupertinoLocalizations>(getCupertinoTranslation(
         locale,
         fullYearFormat,
         dayFormat,
         mediumDateFormat,
         singleDigitHourFormat,
         singleDigitMinuteFormat,
         doubleDigitMinuteFormat,
         singleDigitSecondFormat,
         decimalFormat,
       ));
     });
   }

   @override
   bool shouldReload(_GlobalCupertinoLocalizationsDelegate old) => false;

   @override
   String toString() => 'GlobalCupertinoLocalizations.delegate(${kCupertinoSupportedLanguages.length} locales)';
 }
	// Copyright 2014 The Flutter Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	import 'dart:async';

	import 'package:flutter/cupertino.dart';
	import 'package:flutter/foundation.dart';
	import 'package:intl/intl.dart' as intl;

	import 'l10n/generated_cupertino_localizations.dart';
	import 'utils/date_localizations.dart' as util;
	import 'widgets_localizations.dart';

	/// Implementation of localized strings for Cupertino widgets using the `intl`
	/// package for date and time formatting.
	///
	/// Further localization of strings beyond date time formatting are provided
	/// by language specific subclasses of [GlobalCupertinoLocalizations].
	///
	/// ## Supported languages
	///
	/// This class supports locales with the following [Locale.languageCode]s:
	///
	/// {@macro flutter.localizations.cupertino.languages}
	///
	/// This list is available programmatically via [kCupertinoSupportedLanguages].
	///
	/// ## Sample code
	///
	/// To include the localizations provided by this class in a [CupertinoApp],
	/// add [GlobalCupertinoLocalizations.delegates] to
	/// [CupertinoApp.localizationsDelegates], and specify the locales your
	/// app supports with [CupertinoApp.supportedLocales]:
	///
	/// ```dart
	/// new CupertinoApp(
	/// localizationsDelegates: GlobalCupertinoLocalizations.delegates,
	/// supportedLocales: [
	/// const Locale('en', 'US'), // American English
	/// const Locale('he', 'IL'), // Israeli Hebrew
	/// // ...
	/// ],
	/// // ...
	/// )
	/// ```
	///
	/// See also:
	///
	/// * [DefaultCupertinoLocalizations], which provides US English localizations
	/// for Cupertino widgets.
	abstract class GlobalCupertinoLocalizations implements CupertinoLocalizations {
	/// Initializes an object that defines the Cupertino widgets' localized
	/// strings for the given `localeName`.
	///
	/// The remaining '*Format' arguments uses the intl package to provide
	/// [DateFormat] configurations for the `localeName`.
	const GlobalCupertinoLocalizations({
	@required String localeName,
	@required intl.DateFormat fullYearFormat,
	@required intl.DateFormat dayFormat,
	@required intl.DateFormat mediumDateFormat,
	@required intl.DateFormat singleDigitHourFormat,
	@required intl.DateFormat singleDigitMinuteFormat,
	@required intl.DateFormat doubleDigitMinuteFormat,
	@required intl.DateFormat singleDigitSecondFormat,
	@required intl.NumberFormat decimalFormat,
	}) : assert(localeName != null),
	_localeName = localeName,
	assert(fullYearFormat != null),
	_fullYearFormat = fullYearFormat,
	assert(dayFormat != null),
	_dayFormat = dayFormat,
	assert(mediumDateFormat != null),
	_mediumDateFormat = mediumDateFormat,
	assert(singleDigitHourFormat != null),
	_singleDigitHourFormat = singleDigitHourFormat,
	assert(singleDigitMinuteFormat != null),
	_singleDigitMinuteFormat = singleDigitMinuteFormat,
	assert(doubleDigitMinuteFormat != null),
	_doubleDigitMinuteFormat = doubleDigitMinuteFormat,
	assert(singleDigitSecondFormat != null),
	_singleDigitSecondFormat = singleDigitSecondFormat,
	assert(decimalFormat != null),
	_decimalFormat =decimalFormat;

	final String _localeName;
	final intl.DateFormat _fullYearFormat;
	final intl.DateFormat _dayFormat;
	final intl.DateFormat _mediumDateFormat;
	final intl.DateFormat _singleDigitHourFormat;
	final intl.DateFormat _singleDigitMinuteFormat;
	final intl.DateFormat _doubleDigitMinuteFormat;
	final intl.DateFormat _singleDigitSecondFormat;
	final intl.NumberFormat _decimalFormat;

	@override
	String datePickerYear(int yearIndex) {
	return _fullYearFormat.format(DateTime.utc(yearIndex));
	}

	@override
	String datePickerMonth(int monthIndex) {
	// It doesn't actually have anything to do with _fullYearFormat. It's just
	// taking advantage of the fact that _fullYearFormat loaded the needed
	// locale's symbols.
	return _fullYearFormat.dateSymbols.MONTHS[monthIndex - 1];
	}

	@override
	String datePickerDayOfMonth(int dayIndex) {
	// Year and month doesn't matter since we just want to day formatted.
	return _dayFormat.format(DateTime.utc(0, 0, dayIndex));
	}

	@override
	String datePickerMediumDate(DateTime date) {
	return _mediumDateFormat.format(date);
	}

	@override
	String datePickerHour(int hour) {
	return _singleDigitHourFormat.format(DateTime.utc(0, 0, 0, hour));
	}

	@override
	String datePickerMinute(int minute) {
	return _doubleDigitMinuteFormat.format(DateTime.utc(0, 0, 0, 0, minute));
	}

	/// Subclasses should provide the optional zero pluralization of [datePickerHourSemanticsLabel] based on the ARB file.
	@protected String get datePickerHourSemanticsLabelZero => null;
	/// Subclasses should provide the optional one pluralization of [datePickerHourSemanticsLabel] based on the ARB file.
	@protected String get datePickerHourSemanticsLabelOne => null;
	/// Subclasses should provide the optional two pluralization of [datePickerHourSemanticsLabel] based on the ARB file.
	@protected String get datePickerHourSemanticsLabelTwo => null;
	/// Subclasses should provide the optional few pluralization of [datePickerHourSemanticsLabel] based on the ARB file.
	@protected String get datePickerHourSemanticsLabelFew => null;
	/// Subclasses should provide the optional many pluralization of [datePickerHourSemanticsLabel] based on the ARB file.
	@protected String get datePickerHourSemanticsLabelMany => null;
	/// Subclasses should provide the required other pluralization of [datePickerHourSemanticsLabel] based on the ARB file.
	@protected String get datePickerHourSemanticsLabelOther;

	@override
	String datePickerHourSemanticsLabel(int hour) {
	return intl.Intl.pluralLogic(
	hour,
	zero: datePickerHourSemanticsLabelZero,
	one: datePickerHourSemanticsLabelOne,
	two: datePickerHourSemanticsLabelTwo,
	few: datePickerHourSemanticsLabelFew,
	many: datePickerHourSemanticsLabelMany,
	other: datePickerHourSemanticsLabelOther,
	locale: _localeName,
	).replaceFirst(r'$hour', _decimalFormat.format(hour));
	}

	/// Subclasses should provide the optional zero pluralization of [datePickerMinuteSemanticsLabel] based on the ARB file.
	@protected String get datePickerMinuteSemanticsLabelZero => null;
	/// Subclasses should provide the optional one pluralization of [datePickerMinuteSemanticsLabel] based on the ARB file.
	@protected String get datePickerMinuteSemanticsLabelOne => null;
	/// Subclasses should provide the optional two pluralization of [datePickerMinuteSemanticsLabel] based on the ARB file.
	@protected String get datePickerMinuteSemanticsLabelTwo => null;
	/// Subclasses should provide the optional few pluralization of [datePickerMinuteSemanticsLabel] based on the ARB file.
	@protected String get datePickerMinuteSemanticsLabelFew => null;
	/// Subclasses should provide the optional many pluralization of [datePickerMinuteSemanticsLabel] based on the ARB file.
	@protected String get datePickerMinuteSemanticsLabelMany => null;
	/// Subclasses should provide the required other pluralization of [datePickerMinuteSemanticsLabel] based on the ARB file.
	@protected String get datePickerMinuteSemanticsLabelOther;

	@override
	String datePickerMinuteSemanticsLabel(int minute) {
	return intl.Intl.pluralLogic(
	minute,
	zero: datePickerMinuteSemanticsLabelZero,
	one: datePickerMinuteSemanticsLabelOne,
	two: datePickerMinuteSemanticsLabelTwo,
	few: datePickerMinuteSemanticsLabelFew,
	many: datePickerMinuteSemanticsLabelMany,
	other: datePickerMinuteSemanticsLabelOther,
	locale: _localeName,
	).replaceFirst(r'$minute', _decimalFormat.format(minute));
	}

	/// A string describing the [DatePickerDateOrder] enum value.
	///
	/// Subclasses should provide this string value based on the ARB file for
	/// the locale.
	///
	/// See also:
	///
	/// * [datePickerDateOrder], which provides the [DatePickerDateOrder]
	/// enum value for [CupertinoLocalizations] based on this string value
	@protected
	String get datePickerDateOrderString;

	@override
	DatePickerDateOrder get datePickerDateOrder {
	switch (datePickerDateOrderString) {
	case 'dmy':
	return DatePickerDateOrder.dmy;
	case 'mdy':
	return DatePickerDateOrder.mdy;
	case 'ymd':
	return DatePickerDateOrder.ymd;
	case 'ydm':
	return DatePickerDateOrder.ydm;
	default:
	assert(
	false,
	'Failed to load DatePickerDateOrder $datePickerDateOrderString for '
	"locale $_localeName.\nNon conforming string for $_localeName's "
	'.arb file',
	);
	return null;
	}
	}

	/// A string describing the [DatePickerDateTimeOrder] enum value.
	///
	/// Subclasses should provide this string value based on the ARB file for
	/// the locale.
	///
	/// See also:
	///
	/// * [datePickerDateTimeOrder], which provides the [DatePickerDateTimeOrder]
	/// enum value for [CupertinoLocalizations] based on this string value.
	@protected
	String get datePickerDateTimeOrderString;

	@override
	DatePickerDateTimeOrder get datePickerDateTimeOrder {
	switch (datePickerDateTimeOrderString) {
	case 'date_time_dayPeriod':
	return DatePickerDateTimeOrder.date_time_dayPeriod;
	case 'date_dayPeriod_time':
	return DatePickerDateTimeOrder.date_dayPeriod_time;
	case 'time_dayPeriod_date':
	return DatePickerDateTimeOrder.time_dayPeriod_date;
	case 'dayPeriod_time_date':
	return DatePickerDateTimeOrder.dayPeriod_time_date;
	default:
	assert(
	false,
	'Failed to load DatePickerDateTimeOrder $datePickerDateTimeOrderString '
	"for locale $_localeName.\nNon conforming string for $_localeName's "
	'.arb file',
	);
	return null;
	}
	}

	/// The raw version of [tabSemanticsLabel], with `$tabIndex` and `$tabCount` verbatim
	/// in the string.
	@protected
	String get tabSemanticsLabelRaw;

	@override
	String tabSemanticsLabel({ int tabIndex, int tabCount }) {
	assert(tabIndex >= 1);
	assert(tabCount >= 1);
	final String template = tabSemanticsLabelRaw;
	return template
	.replaceFirst(r'$tabIndex', _decimalFormat.format(tabIndex))
	.replaceFirst(r'$tabCount', _decimalFormat.format(tabCount));
	}

	@override
	String timerPickerHour(int hour) {
	return _singleDigitHourFormat.format(DateTime.utc(0, 0, 0, hour));
	}

	@override
	String timerPickerMinute(int minute) {
	return _singleDigitMinuteFormat.format(DateTime.utc(0, 0, 0, 0, minute));
	}

	@override
	String timerPickerSecond(int second) {
	return _singleDigitSecondFormat.format(DateTime.utc(0, 0, 0, 0, 0, second));
	}

	/// Subclasses should provide the optional zero pluralization of [timerPickerHourLabel] based on the ARB file.
	@protected String get timerPickerHourLabelZero => null;
	/// Subclasses should provide the optional one pluralization of [timerPickerHourLabel] based on the ARB file.
	@protected String get timerPickerHourLabelOne => null;
	/// Subclasses should provide the optional two pluralization of [timerPickerHourLabel] based on the ARB file.
	@protected String get timerPickerHourLabelTwo => null;
	/// Subclasses should provide the optional few pluralization of [timerPickerHourLabel] based on the ARB file.
	@protected String get timerPickerHourLabelFew => null;
	/// Subclasses should provide the optional many pluralization of [timerPickerHourLabel] based on the ARB file.
	@protected String get timerPickerHourLabelMany => null;
	/// Subclasses should provide the required other pluralization of [timerPickerHourLabel] based on the ARB file.
	@protected String get timerPickerHourLabelOther;

	@override
	String timerPickerHourLabel(int hour) {
	return intl.Intl.pluralLogic(
	hour,
	zero: timerPickerHourLabelZero,
	one: timerPickerHourLabelOne,
	two: timerPickerHourLabelTwo,
	few: timerPickerHourLabelFew,
	many: timerPickerHourLabelMany,
	other: timerPickerHourLabelOther,
	locale: _localeName,
	).replaceFirst(r'$hour', _decimalFormat.format(hour));
	}

	/// Subclasses should provide the optional zero pluralization of [timerPickerMinuteLabel] based on the ARB file.
	@protected String get timerPickerMinuteLabelZero => null;
	/// Subclasses should provide the optional one pluralization of [timerPickerMinuteLabel] based on the ARB file.
	@protected String get timerPickerMinuteLabelOne => null;
	/// Subclasses should provide the optional two pluralization of [timerPickerMinuteLabel] based on the ARB file.
	@protected String get timerPickerMinuteLabelTwo => null;
	/// Subclasses should provide the optional few pluralization of [timerPickerMinuteLabel] based on the ARB file.
	@protected String get timerPickerMinuteLabelFew => null;
	/// Subclasses should provide the optional many pluralization of [timerPickerMinuteLabel] based on the ARB file.
	@protected String get timerPickerMinuteLabelMany => null;
	/// Subclasses should provide the required other pluralization of [timerPickerMinuteLabel] based on the ARB file.
	@protected String get timerPickerMinuteLabelOther;

	@override
	String timerPickerMinuteLabel(int minute) {
	return intl.Intl.pluralLogic(
	minute,
	zero: timerPickerMinuteLabelZero,
	one: timerPickerMinuteLabelOne,
	two: timerPickerMinuteLabelTwo,
	few: timerPickerMinuteLabelFew,
	many: timerPickerMinuteLabelMany,
	other: timerPickerMinuteLabelOther,
	locale: _localeName,
	).replaceFirst(r'$minute', _decimalFormat.format(minute));
	}

	/// Subclasses should provide the optional zero pluralization of [timerPickerSecondLabel] based on the ARB file.
	@protected String get timerPickerSecondLabelZero => null;
	/// Subclasses should provide the optional one pluralization of [timerPickerSecondLabel] based on the ARB file.
	@protected String get timerPickerSecondLabelOne => null;
	/// Subclasses should provide the optional two pluralization of [timerPickerSecondLabel] based on the ARB file.
	@protected String get timerPickerSecondLabelTwo => null;
	/// Subclasses should provide the optional few pluralization of [timerPickerSecondLabel] based on the ARB file.
	@protected String get timerPickerSecondLabelFew => null;
	/// Subclasses should provide the optional many pluralization of [timerPickerSecondLabel] based on the ARB file.
	@protected String get timerPickerSecondLabelMany => null;
	/// Subclasses should provide the required other pluralization of [timerPickerSecondLabel] based on the ARB file.
	@protected String get timerPickerSecondLabelOther;

	@override
	String timerPickerSecondLabel(int second) {
	return intl.Intl.pluralLogic(
	second,
	zero: timerPickerSecondLabelZero,
	one: timerPickerSecondLabelOne,
	two: timerPickerSecondLabelTwo,
	few: timerPickerSecondLabelFew,
	many: timerPickerSecondLabelMany,
	other: timerPickerSecondLabelOther,
	locale: _localeName,
	).replaceFirst(r'$second', _decimalFormat.format(second));
	}

	/// A [LocalizationsDelegate] for [CupertinoLocalizations].
	///
	/// Most internationalized apps will use [GlobalCupertinoLocalizations.delegates]
	/// as the value of [CupertinoApp.localizationsDelegates] to include
	/// the localizations for both the cupertino and widget libraries.
	static const LocalizationsDelegate<CupertinoLocalizations> delegate = _GlobalCupertinoLocalizationsDelegate();

	/// A value for [CupertinoApp.localizationsDelegates] that's typically used by
	/// internationalized apps.
	///
	/// ## Sample code
	///
	/// To include the localizations provided by this class and by
	/// [GlobalWidgetsLocalizations] in a [CupertinoApp],
	/// use [GlobalCupertinoLocalizations.delegates] as the value of
	/// [CupertinoApp.localizationsDelegates], and specify the locales your
	/// app supports with [CupertinoApp.supportedLocales]:
	///
	/// ```dart
	/// new CupertinoApp(
	/// localizationsDelegates: GlobalCupertinoLocalizations.delegates,
	/// supportedLocales: [
	/// const Locale('en', 'US'), // English
	/// const Locale('he', 'IL'), // Hebrew
	/// ],
	/// // ...
	/// )
	/// ```
	static const List<LocalizationsDelegate<dynamic>> delegates = <LocalizationsDelegate<dynamic>>[
	GlobalCupertinoLocalizations.delegate,
	GlobalWidgetsLocalizations.delegate,
	];
	}

	class _GlobalCupertinoLocalizationsDelegate extends LocalizationsDelegate<CupertinoLocalizations> {
	const _GlobalCupertinoLocalizationsDelegate();

	@override
	bool isSupported(Locale locale) => kCupertinoSupportedLanguages.contains(locale.languageCode);

	static final Map<Locale, Future<CupertinoLocalizations>> _loadedTranslations = <Locale, Future<CupertinoLocalizations>>{};

	@override
	Future<CupertinoLocalizations> load(Locale locale) {
	assert(isSupported(locale));
	return _loadedTranslations.putIfAbsent(locale, () {
	util.loadDateIntlDataIfNotLoaded();

	final String localeName = intl.Intl.canonicalizedLocale(locale.toString());
	assert(
	locale.toString() == localeName,
	'Flutter does not support the non-standard locale form $locale (which '
	'might be $localeName',
	);

	intl.DateFormat fullYearFormat;
	intl.DateFormat dayFormat;
	intl.DateFormat mediumDateFormat;
	// We don't want any additional decoration here. The am/pm is handled in
	// the date picker. We just want an hour number localized.
	intl.DateFormat singleDigitHourFormat;
	intl.DateFormat singleDigitMinuteFormat;
	intl.DateFormat doubleDigitMinuteFormat;
	intl.DateFormat singleDigitSecondFormat;
	intl.NumberFormat decimalFormat;

	void loadFormats(String locale) {
	fullYearFormat = intl.DateFormat.y(locale);
	dayFormat = intl.DateFormat.d(locale);
	mediumDateFormat = intl.DateFormat.MMMEd(locale);
	// TODO(xster): fix when https://github.com/dart-lang/intl/issues/207 is resolved.
	singleDigitHourFormat = intl.DateFormat('HH', locale);
	singleDigitMinuteFormat = intl.DateFormat.m(locale);
	doubleDigitMinuteFormat = intl.DateFormat('mm', locale);
	singleDigitSecondFormat = intl.DateFormat.s(locale);
	decimalFormat = intl.NumberFormat.decimalPattern(locale);
	}

	if (intl.DateFormat.localeExists(localeName)) {
	loadFormats(localeName);
	} else if (intl.DateFormat.localeExists(locale.languageCode)) {
	loadFormats(locale.languageCode);
	} else {
	loadFormats(null);
	}

	return SynchronousFuture<CupertinoLocalizations>(getCupertinoTranslation(
	locale,
	fullYearFormat,
	dayFormat,
	mediumDateFormat,
	singleDigitHourFormat,
	singleDigitMinuteFormat,
	doubleDigitMinuteFormat,
	singleDigitSecondFormat,
	decimalFormat,
	));
	});
	}

	@override
	bool shouldReload(_GlobalCupertinoLocalizationsDelegate old) => false;

	@override
	String toString() => 'GlobalCupertinoLocalizations.delegate(${kCupertinoSupportedLanguages.length} locales)';
	}