// 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.

/// @docImport 'interface_level.dart';

/// @docImport 'theme.dart';

library;

import 'package:flutter/foundation.dart';

import 'package:flutter/widgets.dart';

import 'colors.dart';

// Please update _TextThemeDefaultsBuilder accordingly after changing the default

// color here, as their implementation depends on the default value of the color

// field.

//

// Values derived from https://developer.apple.com/design/resources/.

const TextStyle _kDefaultTextStyle = TextStyle(

inherit: false,

fontFamily: 'CupertinoSystemText',

fontSize: 17.0,

letterSpacing: -0.41,

color: CupertinoColors.label,

decoration: TextDecoration.none,

);

// Please update _TextThemeDefaultsBuilder accordingly after changing the default

// color here, as their implementation depends on the default value of the color

// field.

//

// Values derived from https://developer.apple.com/design/resources/.

// See [iOS 17 + iPadOS 17 UI Kit](https://www.figma.com/community/file/1248375255495415511) for details.

const TextStyle _kDefaultActionTextStyle = TextStyle(

inherit: false,

fontFamily: 'CupertinoSystemText',

fontSize: 17.0,

letterSpacing: -0.41,

color: CupertinoColors.activeBlue,

decoration: TextDecoration.none,

);

// Please update _TextThemeDefaultsBuilder accordingly after changing the default

// color here, as their implementation depends on the default value of the color

// field.

//

// Values derived from https://developer.apple.com/design/resources/.

// See [iOS 17 + iPadOS 17 UI Kit](https://www.figma.com/community/file/1248375255495415511) for details.

const TextStyle _kDefaultActionSmallTextStyle = TextStyle(

inherit: false,

fontFamily: 'CupertinoSystemText',

fontSize: 15.0,

letterSpacing: -0.23,

color: CupertinoColors.activeBlue,

decoration: TextDecoration.none,

);

// Please update _TextThemeDefaultsBuilder accordingly after changing the default

// color here, as their implementation depends on the default value of the color

// field.

//

// Values derived from https://developer.apple.com/design/resources/.

const TextStyle _kDefaultTabLabelTextStyle = TextStyle(

inherit: false,

fontFamily: 'CupertinoSystemText',

fontSize: 10.0,

fontWeight: FontWeight.w500,

letterSpacing: -0.24,

color: CupertinoColors.inactiveGray,

);

const TextStyle _kDefaultMiddleTitleTextStyle = TextStyle(

inherit: false,

fontFamily: 'CupertinoSystemText',

fontSize: 17.0,

fontWeight: FontWeight.w600,

letterSpacing: -0.41,

color: CupertinoColors.label,

);

const TextStyle _kDefaultLargeTitleTextStyle = TextStyle(

inherit: false,

fontFamily: 'CupertinoSystemDisplay',

fontSize: 34.0,

fontWeight: FontWeight.w700,

letterSpacing: 0.38,

color: CupertinoColors.label,

);

// Please update _TextThemeDefaultsBuilder accordingly after changing the default

// color here, as their implementation depends on the default value of the color

// field.

//

// Inspected on iOS 13 simulator with "Debug View Hierarchy".

// Value extracted from off-center labels. Centered labels have a font size of 25pt.

//

// The letterSpacing sourced from iOS 14 simulator screenshots for comparison.

// See also:

//

// * https://github.com/flutter/flutter/pull/65501#discussion_r486557093

const TextStyle _kDefaultPickerTextStyle = TextStyle(

inherit: false,

fontFamily: 'CupertinoSystemDisplay',

fontSize: 21.0,

fontWeight: FontWeight.w400,

letterSpacing: -0.6,

color: CupertinoColors.label,

);

// Please update _TextThemeDefaultsBuilder accordingly after changing the default

// color here, as their implementation depends on the default value of the color

// field.

//

// Inspected on iOS 13 simulator with "Debug View Hierarchy".

// Value extracted from off-center labels. Centered labels have a font size of 25pt.

const TextStyle _kDefaultDateTimePickerTextStyle = TextStyle(

inherit: false,

fontFamily: 'CupertinoSystemDisplay',

fontSize: 21,

letterSpacing: 0.4,

fontWeight: FontWeight.normal,

color: CupertinoColors.label,

);

TextStyle? _resolveTextStyle(TextStyle? style, BuildContext context) {

// This does not resolve the shadow color, foreground, background, etc.

return style?.copyWith(

color: CupertinoDynamicColor.maybeResolve(style.color, context),

backgroundColor: CupertinoDynamicColor.maybeResolve(style.backgroundColor, context),

decorationColor: CupertinoDynamicColor.maybeResolve(style.decorationColor, context),

);

}

/// Cupertino typography theme in a [CupertinoThemeData].

@immutable

class CupertinoTextThemeData with Diagnosticable {

/// Create a [CupertinoTextThemeData].

///

/// The [primaryColor] is used to derive TextStyle defaults of other attributes

/// such as [navActionTextStyle] and [actionTextStyle]. It must not be null when

/// either [navActionTextStyle] or [actionTextStyle] is null. Defaults to

/// [CupertinoColors.systemBlue].

///

/// Other [TextStyle] parameters default to default iOS text styles when

/// unspecified.

const CupertinoTextThemeData({

Color primaryColor = CupertinoColors.systemBlue,

TextStyle? textStyle,

TextStyle? actionTextStyle,

TextStyle? actionSmallTextStyle,

TextStyle? tabLabelTextStyle,

TextStyle? navTitleTextStyle,

TextStyle? navLargeTitleTextStyle,

TextStyle? navActionTextStyle,

TextStyle? pickerTextStyle,

TextStyle? dateTimePickerTextStyle,

}) : this._raw(

const _TextThemeDefaultsBuilder(CupertinoColors.label, CupertinoColors.inactiveGray),

primaryColor,

textStyle,

actionTextStyle,

actionSmallTextStyle,

tabLabelTextStyle,

navTitleTextStyle,

navLargeTitleTextStyle,

navActionTextStyle,

pickerTextStyle,

dateTimePickerTextStyle,

);

const CupertinoTextThemeData._raw(

this._defaults,

this._primaryColor,

this._textStyle,

this._actionTextStyle,

this._actionSmallTextStyle,

this._tabLabelTextStyle,

this._navTitleTextStyle,

this._navLargeTitleTextStyle,

this._navActionTextStyle,

this._pickerTextStyle,

this._dateTimePickerTextStyle,

) : assert((_navActionTextStyle != null && _actionTextStyle != null) || _primaryColor != null);

final _TextThemeDefaultsBuilder _defaults;

final Color? _primaryColor;

final TextStyle? _textStyle;

/// The [TextStyle] of general text content for Cupertino widgets.

TextStyle get textStyle => _textStyle ?? _defaults.textStyle;

final TextStyle? _actionTextStyle;

/// The [TextStyle] of interactive text content such as text in a button without background.

TextStyle get actionTextStyle {

return _actionTextStyle ?? _defaults.actionTextStyle(primaryColor: _primaryColor);

}

final TextStyle? _actionSmallTextStyle;

/// The [TextStyle] of interactive text content such as text in a small button.

TextStyle get actionSmallTextStyle {

return _actionSmallTextStyle ?? _defaults.actionSmallTextStyle(primaryColor: _primaryColor);

}

final TextStyle? _tabLabelTextStyle;

/// The [TextStyle] of unselected tabs.

TextStyle get tabLabelTextStyle => _tabLabelTextStyle ?? _defaults.tabLabelTextStyle;

final TextStyle? _navTitleTextStyle;

/// The [TextStyle] of titles in standard navigation bars.

TextStyle get navTitleTextStyle => _navTitleTextStyle ?? _defaults.navTitleTextStyle;

final TextStyle? _navLargeTitleTextStyle;

/// The [TextStyle] of large titles in sliver navigation bars.

TextStyle get navLargeTitleTextStyle =>

_navLargeTitleTextStyle ?? _defaults.navLargeTitleTextStyle;

final TextStyle? _navActionTextStyle;

/// The [TextStyle] of interactive text content in navigation bars.

TextStyle get navActionTextStyle {

return _navActionTextStyle ?? _defaults.navActionTextStyle(primaryColor: _primaryColor);

}

final TextStyle? _pickerTextStyle;

/// The [TextStyle] of pickers.

TextStyle get pickerTextStyle => _pickerTextStyle ?? _defaults.pickerTextStyle;

final TextStyle? _dateTimePickerTextStyle;

/// The [TextStyle] of date time pickers.

TextStyle get dateTimePickerTextStyle =>

_dateTimePickerTextStyle ?? _defaults.dateTimePickerTextStyle;

/// Returns a copy of the current [CupertinoTextThemeData] with all the colors

/// resolved against the given [BuildContext].

///

/// If any of the [InheritedWidget]s required to resolve this

/// [CupertinoTextThemeData] is not found in [context], any unresolved

/// [CupertinoDynamicColor]s will use the default trait value

/// ([Brightness.light] platform brightness, normal contrast,

/// [CupertinoUserInterfaceLevelData.base] elevation level).

CupertinoTextThemeData resolveFrom(BuildContext context) {

return CupertinoTextThemeData._raw(

_defaults.resolveFrom(context),

CupertinoDynamicColor.maybeResolve(_primaryColor, context),

_resolveTextStyle(_textStyle, context),

_resolveTextStyle(_actionTextStyle, context),

_resolveTextStyle(_actionSmallTextStyle, context),

_resolveTextStyle(_tabLabelTextStyle, context),

_resolveTextStyle(_navTitleTextStyle, context),

_resolveTextStyle(_navLargeTitleTextStyle, context),

_resolveTextStyle(_navActionTextStyle, context),

_resolveTextStyle(_pickerTextStyle, context),

_resolveTextStyle(_dateTimePickerTextStyle, context),

);

}

/// Returns a copy of the current [CupertinoTextThemeData] instance with

/// specified overrides.

CupertinoTextThemeData copyWith({

Color? primaryColor,

TextStyle? textStyle,

TextStyle? actionTextStyle,

TextStyle? actionSmallTextStyle,

TextStyle? tabLabelTextStyle,

TextStyle? navTitleTextStyle,

TextStyle? navLargeTitleTextStyle,

TextStyle? navActionTextStyle,

TextStyle? pickerTextStyle,

TextStyle? dateTimePickerTextStyle,

}) {

return CupertinoTextThemeData._raw(

_defaults,

primaryColor ?? _primaryColor,

textStyle ?? _textStyle,

actionTextStyle ?? _actionTextStyle,

actionSmallTextStyle ?? _actionSmallTextStyle,

tabLabelTextStyle ?? _tabLabelTextStyle,

navTitleTextStyle ?? _navTitleTextStyle,

navLargeTitleTextStyle ?? _navLargeTitleTextStyle,

navActionTextStyle ?? _navActionTextStyle,

pickerTextStyle ?? _pickerTextStyle,

dateTimePickerTextStyle ?? _dateTimePickerTextStyle,

);

}

@override

void debugFillProperties(DiagnosticPropertiesBuilder properties) {

super.debugFillProperties(properties);

const defaultData = CupertinoTextThemeData();

properties.add(

DiagnosticsProperty<TextStyle>('textStyle', textStyle, defaultValue: defaultData.textStyle),

);

properties.add(

DiagnosticsProperty<TextStyle>(

'actionTextStyle',

actionTextStyle,

defaultValue: defaultData.actionTextStyle,

),

);

properties.add(

DiagnosticsProperty<TextStyle>(

'actionSmallTextStyle',

actionSmallTextStyle,

defaultValue: defaultData.actionSmallTextStyle,

),

);

properties.add(

DiagnosticsProperty<TextStyle>(

'tabLabelTextStyle',

tabLabelTextStyle,

defaultValue: defaultData.tabLabelTextStyle,

),

);

properties.add(

DiagnosticsProperty<TextStyle>(

'navTitleTextStyle',

navTitleTextStyle,

defaultValue: defaultData.navTitleTextStyle,

),

);

properties.add(

DiagnosticsProperty<TextStyle>(

'navLargeTitleTextStyle',

navLargeTitleTextStyle,

defaultValue: defaultData.navLargeTitleTextStyle,

),

);

properties.add(

DiagnosticsProperty<TextStyle>(

'navActionTextStyle',

navActionTextStyle,

defaultValue: defaultData.navActionTextStyle,

),

);

properties.add(

DiagnosticsProperty<TextStyle>(

'pickerTextStyle',

pickerTextStyle,

defaultValue: defaultData.pickerTextStyle,

),

);

properties.add(

DiagnosticsProperty<TextStyle>(

'dateTimePickerTextStyle',

dateTimePickerTextStyle,

defaultValue: defaultData.dateTimePickerTextStyle,

),

);

}

@override

bool operator ==(Object other) {

if (identical(this, other)) {

return true;

}

if (other.runtimeType != runtimeType) {

return false;

}

return other is CupertinoTextThemeData &&

other._defaults == _defaults &&

other._primaryColor == _primaryColor &&

other._textStyle == _textStyle &&

other._actionTextStyle == _actionTextStyle &&

other._actionSmallTextStyle == _actionSmallTextStyle &&

other._tabLabelTextStyle == _tabLabelTextStyle &&

other._navTitleTextStyle == _navTitleTextStyle &&

other._navLargeTitleTextStyle == _navLargeTitleTextStyle &&

other._navActionTextStyle == _navActionTextStyle &&

other._pickerTextStyle == _pickerTextStyle &&

other._dateTimePickerTextStyle == _dateTimePickerTextStyle;

}

@override

int get hashCode => Object.hash(

_defaults,

_primaryColor,

_textStyle,

_actionTextStyle,

_actionSmallTextStyle,

_tabLabelTextStyle,

_navTitleTextStyle,

_navLargeTitleTextStyle,

_navActionTextStyle,

_pickerTextStyle,

_dateTimePickerTextStyle,

);

}

@immutable

class _TextThemeDefaultsBuilder {

const _TextThemeDefaultsBuilder(this.labelColor, this.inactiveGrayColor);

final Color labelColor;

final Color inactiveGrayColor;

static TextStyle _applyLabelColor(TextStyle original, Color color) {

return original.color == color ? original : original.copyWith(color: color);

}

TextStyle get textStyle => _applyLabelColor(_kDefaultTextStyle, labelColor);

TextStyle get tabLabelTextStyle =>

_applyLabelColor(_kDefaultTabLabelTextStyle, inactiveGrayColor);

TextStyle get navTitleTextStyle => _applyLabelColor(_kDefaultMiddleTitleTextStyle, labelColor);

TextStyle get navLargeTitleTextStyle =>

_applyLabelColor(_kDefaultLargeTitleTextStyle, labelColor);

TextStyle get pickerTextStyle => _applyLabelColor(_kDefaultPickerTextStyle, labelColor);

TextStyle get dateTimePickerTextStyle =>

_applyLabelColor(_kDefaultDateTimePickerTextStyle, labelColor);

TextStyle actionTextStyle({Color? primaryColor}) =>

_kDefaultActionTextStyle.copyWith(color: primaryColor);

TextStyle actionSmallTextStyle({Color? primaryColor}) =>

_kDefaultActionSmallTextStyle.copyWith(color: primaryColor);

TextStyle navActionTextStyle({Color? primaryColor}) =>

actionTextStyle(primaryColor: primaryColor);

_TextThemeDefaultsBuilder resolveFrom(BuildContext context) {

final Color resolvedLabelColor = CupertinoDynamicColor.resolve(labelColor, context);

final Color resolvedInactiveGray = CupertinoDynamicColor.resolve(inactiveGrayColor, context);

return resolvedLabelColor == labelColor && resolvedInactiveGray == CupertinoColors.inactiveGray

? this

: _TextThemeDefaultsBuilder(resolvedLabelColor, resolvedInactiveGray);

}

@override

bool operator ==(Object other) {

if (identical(this, other)) {

return true;

}

if (other.runtimeType != runtimeType) {

return false;

}

return other is _TextThemeDefaultsBuilder &&

other.labelColor == labelColor &&

other.inactiveGrayColor == inactiveGrayColor;

}

@override

int get hashCode => Object.hash(labelColor, inactiveGrayColor);

}