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material_localizations.dart
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material_localizations.dart
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// 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 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:intl/intl.dart' as intl;
import 'cupertino_localizations.dart';
import 'l10n/generated_material_localizations.dart';
import 'utils/date_localizations.dart' as util;
import 'widgets_localizations.dart';
/// Implementation of localized strings for the material widgets using the
/// `intl` package for date and time formatting.
///
/// ## Supported languages
///
/// This class supports locales with the following [Locale.languageCode]s:
///
/// {@macro flutter.localizations.material.languages}
///
/// This list is available programmatically via [kMaterialSupportedLanguages].
///
/// ## Sample code
///
/// To include the localizations provided by this class in a [MaterialApp],
/// add [GlobalMaterialLocalizations.delegates] to
/// [MaterialApp.localizationsDelegates], and specify the locales your
/// app supports with [MaterialApp.supportedLocales]:
///
/// ```dart
/// MaterialApp(
/// localizationsDelegates: GlobalMaterialLocalizations.delegates,
/// supportedLocales: [
/// const Locale('en', 'US'), // American English
/// const Locale('he', 'IL'), // Israeli Hebrew
/// // ...
/// ],
/// // ...
/// )
/// ```
///
/// ## Overriding translations
///
/// To create a translation that's similar to an existing language's translation
/// but has slightly different strings, subclass the relevant translation
/// directly and then create a [LocalizationsDelegate<MaterialLocalizations>]
/// subclass to define how to load it.
///
/// Avoid subclassing an unrelated language (for example, subclassing
/// [MaterialLocalizationEn] and then passing a non-English `localeName` to the
/// constructor). Doing so will cause confusion for locale-specific behaviors;
/// in particular, translations that use the `localeName` for determining how to
/// pluralize will end up doing invalid things. Subclassing an existing
/// language's translations is only suitable for making small changes to the
/// existing strings. For providing a new language entirely, implement
/// [MaterialLocalizations] directly.
///
/// See also:
///
/// * The Flutter Internationalization Tutorial,
/// <https://flutter.dev/tutorials/internationalization/>.
/// * [DefaultMaterialLocalizations], which only provides US English translations.
abstract class GlobalMaterialLocalizations implements MaterialLocalizations {
/// Initializes an object that defines the material widgets' localized strings
/// for the given `locale`.
///
/// The arguments are used for further runtime localization of data,
/// specifically for selecting plurals, date and time formatting, and number
/// formatting. They correspond to the following values:
///
/// 1. The string that would be returned by [Intl.canonicalizedLocale] for
/// the locale.
/// 2. The [DateFormat] for [formatYear].
/// 3. The [DateFormat] for [formatShortDate].
/// 4. The [DateFormat] for [formatMediumDate].
/// 5. The [DateFormat] for [formatFullDate].
/// 6. The [DateFormat] for [formatMonthYear].
/// 7. The [DateFormat] for [formatShortMonthDay].
/// 8. The [NumberFormat] for [formatDecimal] (also used by [formatHour] and
/// [formatTimeOfDay] when [timeOfDayFormat] doesn't use [HourFormat.HH]).
/// 9. The [NumberFormat] for [formatHour] and the hour part of
/// [formatTimeOfDay] when [timeOfDayFormat] uses [HourFormat.HH], and for
/// [formatMinute] and the minute part of [formatTimeOfDay].
///
/// The [narrowWeekdays] and [firstDayOfWeekIndex] properties use the values
/// from the [intl.DateFormat] used by [formatFullDate].
const GlobalMaterialLocalizations({
required String localeName,
required intl.DateFormat fullYearFormat,
required intl.DateFormat compactDateFormat,
required intl.DateFormat shortDateFormat,
required intl.DateFormat mediumDateFormat,
required intl.DateFormat longDateFormat,
required intl.DateFormat yearMonthFormat,
required intl.DateFormat shortMonthDayFormat,
required intl.NumberFormat decimalFormat,
required intl.NumberFormat twoDigitZeroPaddedFormat,
}) : assert(localeName != null),
_localeName = localeName,
assert(fullYearFormat != null),
_fullYearFormat = fullYearFormat,
assert(compactDateFormat != null),
_compactDateFormat = compactDateFormat,
assert(shortDateFormat != null),
_shortDateFormat = shortDateFormat,
assert(mediumDateFormat != null),
_mediumDateFormat = mediumDateFormat,
assert(longDateFormat != null),
_longDateFormat = longDateFormat,
assert(yearMonthFormat != null),
_yearMonthFormat = yearMonthFormat,
assert(shortMonthDayFormat != null),
_shortMonthDayFormat = shortMonthDayFormat,
assert(decimalFormat != null),
_decimalFormat = decimalFormat,
assert(twoDigitZeroPaddedFormat != null),
_twoDigitZeroPaddedFormat = twoDigitZeroPaddedFormat;
final String _localeName;
final intl.DateFormat _fullYearFormat;
final intl.DateFormat _compactDateFormat;
final intl.DateFormat _shortDateFormat;
final intl.DateFormat _mediumDateFormat;
final intl.DateFormat _longDateFormat;
final intl.DateFormat _yearMonthFormat;
final intl.DateFormat _shortMonthDayFormat;
final intl.NumberFormat _decimalFormat;
final intl.NumberFormat _twoDigitZeroPaddedFormat;
@override
String formatHour(TimeOfDay timeOfDay, {bool alwaysUse24HourFormat = false}) {
switch (hourFormat(
of: timeOfDayFormat(alwaysUse24HourFormat: alwaysUse24HourFormat))) {
case HourFormat.HH:
return _twoDigitZeroPaddedFormat.format(timeOfDay.hour);
case HourFormat.H:
return formatDecimal(timeOfDay.hour);
case HourFormat.h:
final int hour = timeOfDay.hourOfPeriod;
return formatDecimal(hour == 0 ? 12 : hour);
}
}
@override
String formatMinute(TimeOfDay timeOfDay) {
return _twoDigitZeroPaddedFormat.format(timeOfDay.minute);
}
@override
String formatYear(DateTime date) {
return _fullYearFormat.format(date);
}
@override
String formatCompactDate(DateTime date) {
return _compactDateFormat.format(date);
}
@override
String formatShortDate(DateTime date) {
return _shortDateFormat.format(date);
}
@override
String formatMediumDate(DateTime date) {
return _mediumDateFormat.format(date);
}
@override
String formatFullDate(DateTime date) {
return _longDateFormat.format(date);
}
@override
String formatMonthYear(DateTime date) {
return _yearMonthFormat.format(date);
}
@override
String formatShortMonthDay(DateTime date) {
return _shortMonthDayFormat.format(date);
}
@override
DateTime? parseCompactDate(String? inputString) {
try {
return inputString != null
? _compactDateFormat.parseStrict(inputString)
: null;
} on FormatException {
return null;
}
}
@override
List<String> get narrowWeekdays {
return _longDateFormat.dateSymbols.NARROWWEEKDAYS;
}
@override
int get firstDayOfWeekIndex =>
(_longDateFormat.dateSymbols.FIRSTDAYOFWEEK + 1) % 7;
@override
String formatDecimal(int number) {
return _decimalFormat.format(number);
}
@override
String formatTimeOfDay(TimeOfDay timeOfDay,
{bool alwaysUse24HourFormat = false}) {
// Not using intl.DateFormat for two reasons:
//
// - DateFormat supports more formats than our material time picker does,
// and we want to be consistent across time picker format and the string
// formatting of the time of day.
// - DateFormat operates on DateTime, which is sensitive to time eras and
// time zones, while here we want to format hour and minute within one day
// no matter what date the day falls on.
final String hour =
formatHour(timeOfDay, alwaysUse24HourFormat: alwaysUse24HourFormat);
final String minute = formatMinute(timeOfDay);
switch (timeOfDayFormat(alwaysUse24HourFormat: alwaysUse24HourFormat)) {
case TimeOfDayFormat.h_colon_mm_space_a:
return '$hour:$minute ${_formatDayPeriod(timeOfDay)!}';
case TimeOfDayFormat.H_colon_mm:
case TimeOfDayFormat.HH_colon_mm:
return '$hour:$minute';
case TimeOfDayFormat.HH_dot_mm:
return '$hour.$minute';
case TimeOfDayFormat.a_space_h_colon_mm:
return '${_formatDayPeriod(timeOfDay)!} $hour:$minute';
case TimeOfDayFormat.frenchCanadian:
return '$hour h $minute';
}
}
String? _formatDayPeriod(TimeOfDay timeOfDay) {
switch (timeOfDay.period) {
case DayPeriod.am:
return anteMeridiemAbbreviation;
case DayPeriod.pm:
return postMeridiemAbbreviation;
}
}
/// The raw version of [dateRangeStartDateSemanticLabel], with `$formattedDate` verbatim
/// in the string.
@protected
String get dateRangeStartDateSemanticLabelRaw;
@override
String dateRangeStartDateSemanticLabel(String formattedDate) {
return dateRangeStartDateSemanticLabelRaw.replaceFirst(
r'$fullDate', formattedDate);
}
/// The raw version of [dateRangeEndDateSemanticLabel], with `$fullDate` verbatim
/// in the string.
@protected
String get dateRangeEndDateSemanticLabelRaw;
@override
String dateRangeEndDateSemanticLabel(String formattedDate) {
return dateRangeEndDateSemanticLabelRaw.replaceFirst(
r'$fullDate', formattedDate);
}
/// The raw version of [aboutListTileTitle], with `$applicationName` verbatim
/// in the string.
@protected
String get aboutListTileTitleRaw;
@override
String aboutListTileTitle(String applicationName) {
final String text = aboutListTileTitleRaw;
return text.replaceFirst(r'$applicationName', applicationName);
}
/// The raw version of [scrimOnTapHint], with `$modalRouteName` verbatim
/// in the string.
@protected
String get scrimOnTapHintRaw;
@override
String scrimOnTapHint(String modalRouteName) {
final String text = scrimOnTapHintRaw;
return text.replaceFirst(r'$modalRouteName', modalRouteName);
}
/// The raw version of [pageRowsInfoTitle], with `$firstRow`, `$lastRow`' and
/// `$rowCount` verbatim in the string, for the case where the value is
/// approximate.
@protected
String get pageRowsInfoTitleApproximateRaw;
/// The raw version of [pageRowsInfoTitle], with `$firstRow`, `$lastRow`' and
/// `$rowCount` verbatim in the string, for the case where the value is
/// precise.
@protected
String get pageRowsInfoTitleRaw;
@override
String pageRowsInfoTitle(
int firstRow, int lastRow, int rowCount, bool rowCountIsApproximate) {
String? text =
rowCountIsApproximate ? pageRowsInfoTitleApproximateRaw : null;
text ??= pageRowsInfoTitleRaw;
assert(text != null,
'A $_localeName localization was not found for pageRowsInfoTitle or pageRowsInfoTitleApproximate');
return text
.replaceFirst(r'$firstRow', formatDecimal(firstRow))
.replaceFirst(r'$lastRow', formatDecimal(lastRow))
.replaceFirst(r'$rowCount', formatDecimal(rowCount));
}
/// The raw version of [tabLabel], with `$tabIndex` and `$tabCount` verbatim
/// in the string.
@protected
String get tabLabelRaw;
@override
String tabLabel({required int tabIndex, required int tabCount}) {
assert(tabIndex >= 1);
assert(tabCount >= 1);
final String template = tabLabelRaw;
return template
.replaceFirst(r'$tabIndex', formatDecimal(tabIndex))
.replaceFirst(r'$tabCount', formatDecimal(tabCount));
}
/// The "zero" form of [selectedRowCountTitle].
///
/// This form is optional.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [selectedRowCountTitleOne], the "one" form
/// * [selectedRowCountTitleTwo], the "two" form
/// * [selectedRowCountTitleFew], the "few" form
/// * [selectedRowCountTitleMany], the "many" form
/// * [selectedRowCountTitleOther], the "other" form
@protected
String? get selectedRowCountTitleZero => null;
/// The "one" form of [selectedRowCountTitle].
///
/// This form is optional.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [selectedRowCountTitleZero], the "zero" form
/// * [selectedRowCountTitleTwo], the "two" form
/// * [selectedRowCountTitleFew], the "few" form
/// * [selectedRowCountTitleMany], the "many" form
/// * [selectedRowCountTitleOther], the "other" form
@protected
String? get selectedRowCountTitleOne => null;
/// The "two" form of [selectedRowCountTitle].
///
/// This form is optional.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [selectedRowCountTitleZero], the "zero" form
/// * [selectedRowCountTitleOne], the "one" form
/// * [selectedRowCountTitleFew], the "few" form
/// * [selectedRowCountTitleMany], the "many" form
/// * [selectedRowCountTitleOther], the "other" form
@protected
String? get selectedRowCountTitleTwo => null;
/// The "few" form of [selectedRowCountTitle].
///
/// This form is optional.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [selectedRowCountTitleZero], the "zero" form
/// * [selectedRowCountTitleOne], the "one" form
/// * [selectedRowCountTitleTwo], the "two" form
/// * [selectedRowCountTitleMany], the "many" form
/// * [selectedRowCountTitleOther], the "other" form
@protected
String? get selectedRowCountTitleFew => null;
/// The "many" form of [selectedRowCountTitle].
///
/// This form is optional.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [selectedRowCountTitleZero], the "zero" form
/// * [selectedRowCountTitleOne], the "one" form
/// * [selectedRowCountTitleTwo], the "two" form
/// * [selectedRowCountTitleFew], the "few" form
/// * [selectedRowCountTitleOther], the "other" form
@protected
String? get selectedRowCountTitleMany => null;
/// The "other" form of [selectedRowCountTitle].
///
/// This form is required.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [selectedRowCountTitleZero], the "zero" form
/// * [selectedRowCountTitleOne], the "one" form
/// * [selectedRowCountTitleTwo], the "two" form
/// * [selectedRowCountTitleFew], the "few" form
/// * [selectedRowCountTitleMany], the "many" form
@protected
String get selectedRowCountTitleOther;
@override
String selectedRowCountTitle(int selectedRowCount) {
return intl.Intl.pluralLogic(
selectedRowCount,
zero: selectedRowCountTitleZero,
one: selectedRowCountTitleOne,
two: selectedRowCountTitleTwo,
few: selectedRowCountTitleFew,
many: selectedRowCountTitleMany,
other: selectedRowCountTitleOther,
locale: _localeName,
).replaceFirst(r'$selectedRowCount', formatDecimal(selectedRowCount));
}
/// The format to use for [timeOfDayFormat].
@protected
TimeOfDayFormat get timeOfDayFormatRaw;
/// The [TimeOfDayFormat] corresponding to one of the following supported
/// patterns:
///
/// * `HH:mm`
/// * `HH.mm`
/// * `HH 'h' mm`
/// * `HH:mm น.`
/// * `H:mm`
/// * `h:mm a`
/// * `a h:mm`
/// * `ah:mm`
///
/// See also:
///
/// * <http://demo.icu-project.org/icu-bin/locexp?d_=en&_=en_US>, which shows
/// the short time pattern used in the `en_US` locale.
@override
TimeOfDayFormat timeOfDayFormat({bool alwaysUse24HourFormat = false}) {
assert(alwaysUse24HourFormat != null);
if (alwaysUse24HourFormat) {
return _get24HourVersionOf(timeOfDayFormatRaw);
}
return timeOfDayFormatRaw;
}
/// The "zero" form of [licensesPackageDetailText].
///
/// This form is optional.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [licensesPackageDetailTextZero], the "zero" form
/// * [licensesPackageDetailTextOne], the "one" form
/// * [licensesPackageDetailTextTwo], the "two" form
/// * [licensesPackageDetailTextFew], the "few" form
/// * [licensesPackageDetailTextMany], the "many" form
/// * [licensesPackageDetailTextOther], the "other" form
@protected
String? get licensesPackageDetailTextZero => null;
/// The "one" form of [licensesPackageDetailText].
///
/// This form is optional.
///
/// See also:
///
/// * [licensesPackageDetailTextZero], the "zero" form
/// * [licensesPackageDetailTextOne], the "one" form
/// * [licensesPackageDetailTextTwo], the "two" form
/// * [licensesPackageDetailTextFew], the "few" form
/// * [licensesPackageDetailTextMany], the "many" form
/// * [licensesPackageDetailTextOther], the "other" form
@protected
String? get licensesPackageDetailTextOne => null;
/// The "two" form of [licensesPackageDetailText].
///
/// This form is optional.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [licensesPackageDetailTextZero], the "zero" form
/// * [licensesPackageDetailTextOne], the "one" form
/// * [licensesPackageDetailTextTwo], the "two" form
/// * [licensesPackageDetailTextFew], the "few" form
/// * [licensesPackageDetailTextMany], the "many" form
/// * [licensesPackageDetailTextOther], the "other" form
@protected
String? get licensesPackageDetailTextTwo => null;
/// The "many" form of [licensesPackageDetailText].
///
/// This form is optional.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [licensesPackageDetailTextZero], the "zero" form
/// * [licensesPackageDetailTextOne], the "one" form
/// * [licensesPackageDetailTextTwo], the "two" form
/// * [licensesPackageDetailTextFew], the "few" form
/// * [licensesPackageDetailTextMany], the "many" form
/// * [licensesPackageDetailTextOther], the "other" form
@protected
String? get licensesPackageDetailTextMany => null;
/// The "few" form of [licensesPackageDetailText].
///
/// This form is optional.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [licensesPackageDetailTextZero], the "zero" form
/// * [licensesPackageDetailTextOne], the "one" form
/// * [licensesPackageDetailTextTwo], the "two" form
/// * [licensesPackageDetailTextFew], the "few" form
/// * [licensesPackageDetailTextMany], the "many" form
/// * [licensesPackageDetailTextOther], the "other" form
@protected
String? get licensesPackageDetailTextFew => null;
/// The "other" form of [licensesPackageDetailText].
///
/// This form is required.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [licensesPackageDetailTextZero], the "zero" form
/// * [licensesPackageDetailTextOne], the "one" form
/// * [licensesPackageDetailTextTwo], the "two" form
/// * [licensesPackageDetailTextFew], the "few" form
/// * [licensesPackageDetailTextMany], the "many" form
/// * [licensesPackageDetailTextOther], the "other" form
@protected
String get licensesPackageDetailTextOther;
@override
String licensesPackageDetailText(int licenseCount) {
return intl.Intl.pluralLogic(
licenseCount,
zero: licensesPackageDetailTextZero,
one: licensesPackageDetailTextOne,
two: licensesPackageDetailTextTwo,
many: licensesPackageDetailTextMany,
few: licensesPackageDetailTextFew,
other: licensesPackageDetailTextOther,
locale: _localeName,
).replaceFirst(r'$licenseCount', formatDecimal(licenseCount));
}
/// The "zero" form of [remainingTextFieldCharacterCount].
///
/// This form is optional.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [remainingTextFieldCharacterCountZero], the "zero" form
/// * [remainingTextFieldCharacterCountOne], the "one" form
/// * [remainingTextFieldCharacterCountTwo], the "two" form
/// * [remainingTextFieldCharacterCountFew], the "few" form
/// * [remainingTextFieldCharacterCountMany], the "many" form
/// * [remainingTextFieldCharacterCountOther], the "other" form
@protected
String? get remainingTextFieldCharacterCountZero => null;
/// The "one" form of [remainingTextFieldCharacterCount].
///
/// This form is optional.
///
/// See also:
///
/// * [remainingTextFieldCharacterCountZero], the "zero" form
/// * [remainingTextFieldCharacterCountOne], the "one" form
/// * [remainingTextFieldCharacterCountTwo], the "two" form
/// * [remainingTextFieldCharacterCountFew], the "few" form
/// * [remainingTextFieldCharacterCountMany], the "many" form
/// * [remainingTextFieldCharacterCountOther], the "other" form
@protected
String? get remainingTextFieldCharacterCountOne => null;
/// The "two" form of [remainingTextFieldCharacterCount].
///
/// This form is optional.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [remainingTextFieldCharacterCountZero], the "zero" form
/// * [remainingTextFieldCharacterCountOne], the "one" form
/// * [remainingTextFieldCharacterCountTwo], the "two" form
/// * [remainingTextFieldCharacterCountFew], the "few" form
/// * [remainingTextFieldCharacterCountMany], the "many" form
/// * [remainingTextFieldCharacterCountOther], the "other" form
@protected
String? get remainingTextFieldCharacterCountTwo => null;
/// The "many" form of [remainingTextFieldCharacterCount].
///
/// This form is optional.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [remainingTextFieldCharacterCountZero], the "zero" form
/// * [remainingTextFieldCharacterCountOne], the "one" form
/// * [remainingTextFieldCharacterCountTwo], the "two" form
/// * [remainingTextFieldCharacterCountFew], the "few" form
/// * [remainingTextFieldCharacterCountMany], the "many" form
/// * [remainingTextFieldCharacterCountOther], the "other" form
@protected
String? get remainingTextFieldCharacterCountMany => null;
/// The "few" form of [remainingTextFieldCharacterCount].
///
/// This form is optional.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [remainingTextFieldCharacterCountZero], the "zero" form
/// * [remainingTextFieldCharacterCountOne], the "one" form
/// * [remainingTextFieldCharacterCountTwo], the "two" form
/// * [remainingTextFieldCharacterCountFew], the "few" form
/// * [remainingTextFieldCharacterCountMany], the "many" form
/// * [remainingTextFieldCharacterCountOther], the "other" form
@protected
String? get remainingTextFieldCharacterCountFew => null;
/// The "other" form of [remainingTextFieldCharacterCount].
///
/// This form is required.
///
/// See also:
///
/// * [Intl.plural], to which this form is passed.
/// * [remainingTextFieldCharacterCountZero], the "zero" form
/// * [remainingTextFieldCharacterCountOne], the "one" form
/// * [remainingTextFieldCharacterCountTwo], the "two" form
/// * [remainingTextFieldCharacterCountFew], the "few" form
/// * [remainingTextFieldCharacterCountMany], the "many" form
/// * [remainingTextFieldCharacterCountOther], the "other" form
@protected
String get remainingTextFieldCharacterCountOther;
@override
String remainingTextFieldCharacterCount(int remaining) {
return intl.Intl.pluralLogic(
remaining,
zero: remainingTextFieldCharacterCountZero,
one: remainingTextFieldCharacterCountOne,
two: remainingTextFieldCharacterCountTwo,
many: remainingTextFieldCharacterCountMany,
few: remainingTextFieldCharacterCountFew,
other: remainingTextFieldCharacterCountOther,
locale: _localeName,
).replaceFirst(r'$remainingCount', formatDecimal(remaining));
}
@override
ScriptCategory get scriptCategory;
/// A [LocalizationsDelegate] for [MaterialLocalizations].
///
/// Most internationalized apps will use [GlobalMaterialLocalizations.delegates]
/// as the value of [MaterialApp.localizationsDelegates] to include
/// the localizations for both the material and widget libraries.
static const LocalizationsDelegate<MaterialLocalizations> delegate =
_MaterialLocalizationsDelegate();
/// A value for [MaterialApp.localizationsDelegates] that's typically used by
/// internationalized apps.
///
/// ## Sample code
///
/// To include the localizations provided by this class and by
/// [GlobalWidgetsLocalizations] in a [MaterialApp],
/// use [GlobalMaterialLocalizations.delegates] as the value of
/// [MaterialApp.localizationsDelegates], and specify the locales your
/// app supports with [MaterialApp.supportedLocales]:
///
/// ```dart
/// MaterialApp(
/// localizationsDelegates: GlobalMaterialLocalizations.delegates,
/// supportedLocales: [
/// const Locale('en', 'US'), // English
/// const Locale('he', 'IL'), // Hebrew
/// ],
/// // ...
/// )
/// ```
static const List<LocalizationsDelegate<dynamic>> delegates =
<LocalizationsDelegate<dynamic>>[
GlobalCupertinoLocalizations.delegate,
GlobalMaterialLocalizations.delegate,
GlobalWidgetsLocalizations.delegate,
];
}
/// Finds the [TimeOfDayFormat] to use instead of the `original` when the
/// `original` uses 12-hour format and [MediaQueryData.alwaysUse24HourFormat]
/// is true.
TimeOfDayFormat _get24HourVersionOf(TimeOfDayFormat original) {
switch (original) {
case TimeOfDayFormat.HH_colon_mm:
case TimeOfDayFormat.HH_dot_mm:
case TimeOfDayFormat.frenchCanadian:
case TimeOfDayFormat.H_colon_mm:
return original;
case TimeOfDayFormat.h_colon_mm_space_a:
case TimeOfDayFormat.a_space_h_colon_mm:
return TimeOfDayFormat.HH_colon_mm;
}
}
class _MaterialLocalizationsDelegate
extends LocalizationsDelegate<MaterialLocalizations> {
const _MaterialLocalizationsDelegate();
@override
bool isSupported(Locale locale) =>
kMaterialSupportedLanguages.contains(locale.languageCode);
static final Map<Locale, Future<MaterialLocalizations>> _loadedTranslations =
<Locale, Future<MaterialLocalizations>>{};
@override
Future<MaterialLocalizations> 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 compactDateFormat;
intl.DateFormat shortDateFormat;
intl.DateFormat mediumDateFormat;
intl.DateFormat longDateFormat;
intl.DateFormat yearMonthFormat;
intl.DateFormat shortMonthDayFormat;
if (intl.DateFormat.localeExists(localeName)) {
fullYearFormat = intl.DateFormat.y(localeName);
compactDateFormat = intl.DateFormat.yMd(localeName);
shortDateFormat = intl.DateFormat.yMMMd(localeName);
mediumDateFormat = intl.DateFormat.MMMEd(localeName);
longDateFormat = intl.DateFormat.yMMMMEEEEd(localeName);
yearMonthFormat = intl.DateFormat.yMMMM(localeName);
shortMonthDayFormat = intl.DateFormat.MMMd(localeName);
} else if (intl.DateFormat.localeExists(locale.languageCode)) {
fullYearFormat = intl.DateFormat.y(locale.languageCode);
compactDateFormat = intl.DateFormat.yMd(locale.languageCode);
shortDateFormat = intl.DateFormat.yMMMd(locale.languageCode);
mediumDateFormat = intl.DateFormat.MMMEd(locale.languageCode);
longDateFormat = intl.DateFormat.yMMMMEEEEd(locale.languageCode);
yearMonthFormat = intl.DateFormat.yMMMM(locale.languageCode);
shortMonthDayFormat = intl.DateFormat.MMMd(locale.languageCode);
} else {
fullYearFormat = intl.DateFormat.y();
compactDateFormat = intl.DateFormat.yMd();
shortDateFormat = intl.DateFormat.yMMMd();
mediumDateFormat = intl.DateFormat.MMMEd();
longDateFormat = intl.DateFormat.yMMMMEEEEd();
yearMonthFormat = intl.DateFormat.yMMMM();
shortMonthDayFormat = intl.DateFormat.MMMd();
}
intl.NumberFormat decimalFormat;
intl.NumberFormat twoDigitZeroPaddedFormat;
if (intl.NumberFormat.localeExists(localeName)) {
decimalFormat = intl.NumberFormat.decimalPattern(localeName);
twoDigitZeroPaddedFormat = intl.NumberFormat('00', localeName);
} else if (intl.NumberFormat.localeExists(locale.languageCode)) {
decimalFormat = intl.NumberFormat.decimalPattern(locale.languageCode);
twoDigitZeroPaddedFormat = intl.NumberFormat('00', locale.languageCode);
} else {
decimalFormat = intl.NumberFormat.decimalPattern();
twoDigitZeroPaddedFormat = intl.NumberFormat('00');
}
return SynchronousFuture<MaterialLocalizations>(getMaterialTranslation(
locale,
fullYearFormat,
compactDateFormat,
shortDateFormat,
mediumDateFormat,
longDateFormat,
yearMonthFormat,
shortMonthDayFormat,
decimalFormat,
twoDigitZeroPaddedFormat,
)!);
});
}
@override
bool shouldReload(_MaterialLocalizationsDelegate old) => false;
@override
String toString() =>
'GlobalMaterialLocalizations.delegate(${kMaterialSupportedLanguages.length} locales)';
}