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// Copyright 2018 The Chromium 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/services.dart' show Brightness;
import 'package:flutter/widgets.dart';
import 'colors.dart';
// Values derived from https://developer.apple.com/design/resources/.
const TextStyle _kDefaultLightTextStyle = TextStyle(
inherit: false,
fontFamily: '.SF Pro Text',
fontSize: 17.0,
letterSpacing: -0.41,
color: CupertinoColors.black,
decoration: TextDecoration.none,
);
// Values derived from https://developer.apple.com/design/resources/.
const TextStyle _kDefaultDarkTextStyle = TextStyle(
inherit: false,
fontFamily: '.SF Pro Text',
fontSize: 17.0,
letterSpacing: -0.41,
color: CupertinoColors.white,
decoration: TextDecoration.none,
);
// Values derived from https://developer.apple.com/design/resources/.
const TextStyle _kDefaultActionTextStyle = TextStyle(
inherit: false,
fontFamily: '.SF Pro Text',
fontSize: 17.0,
letterSpacing: -0.41,
color: CupertinoColors.activeBlue,
decoration: TextDecoration.none,
);
// Values derived from https://developer.apple.com/design/resources/.
const TextStyle _kDefaultTabLabelTextStyle = TextStyle(
inherit: false,
fontFamily: '.SF Pro Text',
fontSize: 10.0,
letterSpacing: -0.24,
color: CupertinoColors.inactiveGray,
);
const TextStyle _kDefaultMiddleTitleLightTextStyle = TextStyle(
inherit: false,
fontFamily: '.SF Pro Text',
fontSize: 17.0,
fontWeight: FontWeight.w600,
letterSpacing: -0.41,
color: CupertinoColors.black,
);
const TextStyle _kDefaultMiddleTitleDarkTextStyle = TextStyle(
inherit: false,
fontFamily: '.SF Pro Text',
fontSize: 17.0,
fontWeight: FontWeight.w600,
letterSpacing: -0.41,
color: CupertinoColors.white,
);
const TextStyle _kDefaultLargeTitleLightTextStyle = TextStyle(
inherit: false,
fontFamily: '.SF Pro Display',
fontSize: 34.0,
fontWeight: FontWeight.w700,
letterSpacing: 0.41,
color: CupertinoColors.black,
);
const TextStyle _kDefaultLargeTitleDarkTextStyle = TextStyle(
inherit: false,
fontFamily: '.SF Pro Display',
fontSize: 34.0,
fontWeight: FontWeight.w700,
letterSpacing: 0.41,
color: CupertinoColors.white,
);
// Eyeballed value since it's not documented in https://developer.apple.com/design/resources/.
const TextStyle _kDefaultPickerLightTextStyle = TextStyle(
inherit: false,
fontFamily: '.SF Pro Display',
fontSize: 25.0,
fontWeight: FontWeight.w400,
letterSpacing: -0.41,
color: CupertinoColors.black,
);
// Eyeballed value since it's not documented in https://developer.apple.com/design/resources/.
const TextStyle _kDefaultPickerDarkTextStyle = TextStyle(
inherit: false,
fontFamily: '.SF Pro Display',
fontSize: 25.0,
fontWeight: FontWeight.w400,
letterSpacing: -0.41,
color: CupertinoColors.white,
);
// Eyeballed value since it's not documented in https://developer.apple.com/design/resources/.
const TextStyle _kDefaultDateTimePickerLightTextStyle = TextStyle(
inherit: false,
fontFamily: '.SF Pro Display',
fontSize: 21,
fontWeight: FontWeight.w300,
letterSpacing: -1.05,
color: CupertinoColors.black,
);
// Eyeballed value since it's not documented in https://developer.apple.com/design/resources/.
const TextStyle _kDefaultDateTimePickerDarkTextStyle = TextStyle(
inherit: false,
fontFamily: '.SF Pro Display',
fontSize: 21,
fontWeight: FontWeight.w300,
letterSpacing: -1.05,
color: CupertinoColors.white,
);
/// Cupertino typography theme in a [CupertinoThemeData].
@immutable
class CupertinoTextThemeData extends Diagnosticable {
/// Create a [CupertinoTextThemeData].
///
/// The [primaryColor] and [isLight] parameters are used to derive TextStyle
/// defaults of other attributes such as [textStyle] and [actionTextStyle]
/// etc. The default value of [primaryColor] is [CupertinoColors.activeBlue]
/// and the default value of [isLight] is true.
///
/// Other [TextStyle] parameters default to default iOS text styles when
/// unspecified.
const CupertinoTextThemeData({
Color primaryColor,
Brightness brightness,
TextStyle textStyle,
TextStyle actionTextStyle,
TextStyle tabLabelTextStyle,
TextStyle navTitleTextStyle,
TextStyle navLargeTitleTextStyle,
TextStyle navActionTextStyle,
TextStyle pickerTextStyle,
TextStyle dateTimePickerTextStyle,
}) : _primaryColor = primaryColor ?? CupertinoColors.activeBlue,
_brightness = brightness,
_textStyle = textStyle,
_actionTextStyle = actionTextStyle,
_tabLabelTextStyle = tabLabelTextStyle,
_navTitleTextStyle = navTitleTextStyle,
_navLargeTitleTextStyle = navLargeTitleTextStyle,
_navActionTextStyle = navActionTextStyle,
_pickerTextStyle = pickerTextStyle,
_dateTimePickerTextStyle = dateTimePickerTextStyle;
final Color _primaryColor;
final Brightness _brightness;
bool get _isLight => _brightness != Brightness.dark;
final TextStyle _textStyle;
/// Typography of general text content for Cupertino widgets.
TextStyle get textStyle => _textStyle ?? (_isLight ? _kDefaultLightTextStyle : _kDefaultDarkTextStyle);
final TextStyle _actionTextStyle;
/// Typography of interactive text content such as text in a button without background.
TextStyle get actionTextStyle {
return _actionTextStyle ?? _kDefaultActionTextStyle.copyWith(
color: _primaryColor,
);
}
final TextStyle _tabLabelTextStyle;
/// Typography of unselected tabs.
TextStyle get tabLabelTextStyle => _tabLabelTextStyle ?? _kDefaultTabLabelTextStyle;
final TextStyle _navTitleTextStyle;
/// Typography of titles in standard navigation bars.
TextStyle get navTitleTextStyle {
return _navTitleTextStyle ??
(_isLight ? _kDefaultMiddleTitleLightTextStyle : _kDefaultMiddleTitleDarkTextStyle);
}
final TextStyle _navLargeTitleTextStyle;
/// Typography of large titles in sliver navigation bars.
TextStyle get navLargeTitleTextStyle {
return _navLargeTitleTextStyle ??
(_isLight ? _kDefaultLargeTitleLightTextStyle : _kDefaultLargeTitleDarkTextStyle);
}
final TextStyle _navActionTextStyle;
/// Typography of interactive text content in navigation bars.
TextStyle get navActionTextStyle {
return _navActionTextStyle ?? _kDefaultActionTextStyle.copyWith(
color: _primaryColor,
);
}
final TextStyle _pickerTextStyle;
/// Typography of pickers.
TextStyle get pickerTextStyle {
return _pickerTextStyle ??
(_isLight ? _kDefaultPickerLightTextStyle : _kDefaultPickerDarkTextStyle);
}
final TextStyle _dateTimePickerTextStyle;
/// Typography of date time pickers.
TextStyle get dateTimePickerTextStyle {
return _dateTimePickerTextStyle ??
(_isLight ? _kDefaultDateTimePickerLightTextStyle : _kDefaultDateTimePickerDarkTextStyle);
}
/// Returns a copy of the current [CupertinoTextThemeData] instance with
/// specified overrides.
CupertinoTextThemeData copyWith({
Color primaryColor,
Brightness brightness,
TextStyle textStyle,
TextStyle actionTextStyle,
TextStyle tabLabelTextStyle,
TextStyle navTitleTextStyle,
TextStyle navLargeTitleTextStyle,
TextStyle navActionTextStyle,
TextStyle pickerTextStyle,
TextStyle dateTimePickerTextStyle,
}) {
return CupertinoTextThemeData(
primaryColor: primaryColor ?? _primaryColor,
brightness: brightness ?? _brightness,
textStyle: textStyle ?? _textStyle,
actionTextStyle: actionTextStyle ?? _actionTextStyle,
tabLabelTextStyle: tabLabelTextStyle ?? _tabLabelTextStyle,
navTitleTextStyle: navTitleTextStyle ?? _navTitleTextStyle,
navLargeTitleTextStyle: navLargeTitleTextStyle ?? _navLargeTitleTextStyle,
navActionTextStyle: navActionTextStyle ?? _navActionTextStyle,
pickerTextStyle: pickerTextStyle ?? _pickerTextStyle,
dateTimePickerTextStyle: dateTimePickerTextStyle ?? _dateTimePickerTextStyle,
);
}
}
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