| // Copyright 2015 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/painting.dart'; |
| |
| import 'colors.dart'; |
| |
| |
| |
| /// Material design text theme. |
| /// |
| /// Definitions for the various typographical styles found in material design |
| /// (e.g., headline, caption). Rather than creating a [TextTheme] directly, |
| /// you can obtain an instance as [Typography.black] or [Typography.white]. |
| /// |
| /// To obtain the current text theme, call [Theme.of] with the current |
| /// [BuildContext] and read the [ThemeData.textTheme] property. |
| /// |
| /// The following image [from the material design |
| /// specification](https://material.io/go/design-typography#typography-styles) |
| /// shows the recommended styles for each of the properties of a [TextTheme]. |
| /// This image uses the `Roboto` font, which is the font used on Android. On |
| /// iOS, the [San Francisco |
| /// font](https://developer.apple.com/ios/human-interface-guidelines/visual-design/typography/) |
| /// is automatically used instead. |
| /// |
| ///  |
| /// |
| /// See also: |
| /// |
| /// * [Typography], the class that generates [TextTheme]s appropriate for a platform. |
| /// * [Theme], for other aspects of a material design application that can be |
| /// globally adjusted, such as the color scheme. |
| /// * <http://material.google.com/style/typography.html> |
| @immutable |
| class TextTheme extends Diagnosticable { |
| /// Creates a text theme that uses the given values. |
| /// |
| /// Rather than creating a new text theme, consider using [Typography.black] |
| /// or [Typography.white], which implement the typography styles in the |
| /// material design specification: |
| /// |
| /// <https://material.google.com/style/typography.html#typography-styles> |
| /// |
| /// If you do decide to create your own text theme, consider using one of |
| /// those predefined themes as a starting point for [copyWith] or [apply]. |
| const TextTheme({ |
| this.display4, |
| this.display3, |
| this.display2, |
| this.display1, |
| this.headline, |
| this.title, |
| this.subhead, |
| this.body2, |
| this.body1, |
| this.caption, |
| this.button, |
| }); |
| |
| /// Extremely large text. |
| /// |
| /// The font size is 112 pixels. |
| final TextStyle display4; |
| |
| /// Very, very large text. |
| /// |
| /// Used for the date in the dialog shown by [showDatePicker]. |
| final TextStyle display3; |
| |
| /// Very large text. |
| final TextStyle display2; |
| |
| /// Large text. |
| final TextStyle display1; |
| |
| /// Used for large text in dialogs (e.g., the month and year in the dialog |
| /// shown by [showDatePicker]). |
| final TextStyle headline; |
| |
| /// Used for the primary text in app bars and dialogs (e.g., [AppBar.title] |
| /// and [AlertDialog.title]). |
| final TextStyle title; |
| |
| /// Used for the primary text in lists (e.g., [ListTile.title]). |
| final TextStyle subhead; |
| |
| /// Used for emphasizing text that would otherwise be [body1]. |
| final TextStyle body2; |
| |
| /// Used for the default text style for [Material]. |
| final TextStyle body1; |
| |
| /// Used for auxiliary text associated with images. |
| final TextStyle caption; |
| |
| /// Used for text on [RaisedButton] and [FlatButton]. |
| final TextStyle button; |
| |
| /// Creates a copy of this text theme but with the given fields replaced with |
| /// the new values. |
| /// |
| /// Consider using [Typography.black] or [Typography.white], which implement |
| /// the typography styles in the material design specification, as a starting |
| /// point. |
| /// |
| /// ## Sample code |
| /// |
| /// ```dart |
| /// /// A Widget that sets the ambient theme's title text color for its |
| /// /// descendants, while leaving other ambient theme attributes alone. |
| /// class TitleColorThemeCopy extends StatelessWidget { |
| /// TitleColorThemeCopy({Key key, this.child, this.titleColor}) : super(key: key); |
| /// |
| /// final Color titleColor; |
| /// final Widget child; |
| /// |
| /// @override |
| /// Widget build(BuildContext context) { |
| /// final ThemeData theme = Theme.of(context); |
| /// return new Theme( |
| /// data: theme.copyWith( |
| /// textTheme: theme.textTheme.copyWith( |
| /// title: theme.textTheme.title.copyWith( |
| /// color: titleColor, |
| /// ), |
| /// ), |
| /// ), |
| /// child: child, |
| /// ); |
| /// } |
| /// } |
| /// ``` |
| /// |
| /// See also: |
| /// |
| /// * [merge] is used instead of [copyWith] when you want to merge all |
| /// of the fields of a TextTheme instead of individual fields. |
| TextTheme copyWith({ |
| TextStyle display4, |
| TextStyle display3, |
| TextStyle display2, |
| TextStyle display1, |
| TextStyle headline, |
| TextStyle title, |
| TextStyle subhead, |
| TextStyle body2, |
| TextStyle body1, |
| TextStyle caption, |
| TextStyle button, |
| }) { |
| return new TextTheme( |
| display4: display4 ?? this.display4, |
| display3: display3 ?? this.display3, |
| display2: display2 ?? this.display2, |
| display1: display1 ?? this.display1, |
| headline: headline ?? this.headline, |
| title: title ?? this.title, |
| subhead: subhead ?? this.subhead, |
| body2: body2 ?? this.body2, |
| body1: body1 ?? this.body1, |
| caption: caption ?? this.caption, |
| button: button ?? this.button, |
| ); |
| } |
| |
| /// Creates a new [TextTheme] where each text style from this object has been |
| /// merged with the matching text style from the `other` object. |
| /// |
| /// The merging is done by calling [TextStyle.merge] on each respective pair |
| /// of text styles from this and the [other] text themes and is subject to |
| /// the value of [TextStyle.inherit] flag. For more details, see the |
| /// documentation on [TextStyle.merge] and [TextStyle.inherit]. |
| /// |
| /// If this theme, or the `other` theme has members that are null, then the |
| /// non-null one (if any) is used. If the `other` theme is itself null, then |
| /// this [TextTheme] is returned unchanged. If values in both are set, then |
| /// the values are merged using [TextStyle.merge]. |
| /// |
| /// This is particularly useful if one [TextTheme] defines one set of |
| /// properties and another defines a different set, e.g. having colors |
| /// defined in one text theme and font sizes in another, or when one |
| /// [TextTheme] has only some fields defined, and you want to define the rest |
| /// by merging it with a default theme. |
| /// |
| /// ## Sample code |
| /// |
| /// ```dart |
| /// /// A Widget that sets the ambient theme's title text color for its |
| /// /// descendants, while leaving other ambient theme attributes alone. |
| /// class TitleColorTheme extends StatelessWidget { |
| /// TitleColorTheme({Key key, this.child, this.titleColor}) : super(key: key); |
| /// |
| /// final Color titleColor; |
| /// final Widget child; |
| /// |
| /// @override |
| /// Widget build(BuildContext context) { |
| /// ThemeData theme = Theme.of(context); |
| /// // This partialTheme is incomplete: it only has the title style |
| /// // defined. Just replacing theme.textTheme with partialTheme would |
| /// // set the title, but everything else would be null. This isn't very |
| /// // useful, so merge it with the existing theme to keep all of the |
| /// // preexisting definitions for the other styles. |
| /// TextTheme partialTheme = new TextTheme(title: new TextStyle(color: titleColor)); |
| /// theme = theme.copyWith(textTheme: theme.textTheme.merge(partialTheme)); |
| /// return new Theme(data: theme, child: child); |
| /// } |
| /// } |
| /// ``` |
| /// |
| /// See also: |
| /// |
| /// * [copyWith] is used instead of [merge] when you wish to override |
| /// individual fields in the [TextTheme] instead of merging all of the |
| /// fields of two [TextTheme]s. |
| TextTheme merge(TextTheme other) { |
| if (other == null) |
| return this; |
| return copyWith( |
| display4: display4?.merge(other.display4) ?? other.display4, |
| display3: display3?.merge(other.display3) ?? other.display3, |
| display2: display2?.merge(other.display2) ?? other.display2, |
| display1: display1?.merge(other.display1) ?? other.display1, |
| headline: headline?.merge(other.headline) ?? other.headline, |
| title: title?.merge(other.title) ?? other.title, |
| subhead: subhead?.merge(other.subhead) ?? other.subhead, |
| body2: body2?.merge(other.body2) ?? other.body2, |
| body1: body1?.merge(other.body1) ?? other.body1, |
| caption: caption?.merge(other.caption) ?? other.caption, |
| button: button?.merge(other.button) ?? other.button, |
| ); |
| } |
| |
| /// Creates a copy of this text theme but with the given field replaced in |
| /// each of the individual text styles. |
| /// |
| /// The `displayColor` is applied to [display4], [display3], [display2], |
| /// [display1], and [caption]. The `bodyColor` is applied to the remaining |
| /// text styles. |
| /// |
| /// Consider using [Typography.black] or [Typography.white], which implement |
| /// the typography styles in the material design specification, as a starting |
| /// point. |
| TextTheme apply({ |
| String fontFamily, |
| double fontSizeFactor = 1.0, |
| double fontSizeDelta = 0.0, |
| Color displayColor, |
| Color bodyColor, |
| TextDecoration decoration, |
| Color decorationColor, |
| TextDecorationStyle decorationStyle, |
| }) { |
| return new TextTheme( |
| display4: display4.apply( |
| color: displayColor, |
| decoration: decoration, |
| decorationColor: decorationColor, |
| decorationStyle: decorationStyle, |
| fontFamily: fontFamily, |
| fontSizeFactor: fontSizeFactor, |
| fontSizeDelta: fontSizeDelta, |
| ), |
| display3: display3.apply( |
| color: displayColor, |
| decoration: decoration, |
| decorationColor: decorationColor, |
| decorationStyle: decorationStyle, |
| fontFamily: fontFamily, |
| fontSizeFactor: fontSizeFactor, |
| fontSizeDelta: fontSizeDelta, |
| ), |
| display2: display2.apply( |
| color: displayColor, |
| decoration: decoration, |
| decorationColor: decorationColor, |
| decorationStyle: decorationStyle, |
| fontFamily: fontFamily, |
| fontSizeFactor: fontSizeFactor, |
| fontSizeDelta: fontSizeDelta, |
| ), |
| display1: display1.apply( |
| color: displayColor, |
| decoration: decoration, |
| decorationColor: decorationColor, |
| decorationStyle: decorationStyle, |
| fontFamily: fontFamily, |
| fontSizeFactor: fontSizeFactor, |
| fontSizeDelta: fontSizeDelta, |
| ), |
| headline: headline.apply( |
| color: bodyColor, |
| decoration: decoration, |
| decorationColor: decorationColor, |
| decorationStyle: decorationStyle, |
| fontFamily: fontFamily, |
| fontSizeFactor: fontSizeFactor, |
| fontSizeDelta: fontSizeDelta, |
| ), |
| title: title.apply( |
| color: bodyColor, |
| decoration: decoration, |
| decorationColor: decorationColor, |
| decorationStyle: decorationStyle, |
| fontFamily: fontFamily, |
| fontSizeFactor: fontSizeFactor, |
| fontSizeDelta: fontSizeDelta, |
| ), |
| subhead: subhead.apply( |
| color: bodyColor, |
| decoration: decoration, |
| decorationColor: decorationColor, |
| decorationStyle: decorationStyle, |
| fontFamily: fontFamily, |
| fontSizeFactor: fontSizeFactor, |
| fontSizeDelta: fontSizeDelta, |
| ), |
| body2: body2.apply( |
| color: bodyColor, |
| decoration: decoration, |
| decorationColor: decorationColor, |
| decorationStyle: decorationStyle, |
| fontFamily: fontFamily, |
| fontSizeFactor: fontSizeFactor, |
| fontSizeDelta: fontSizeDelta, |
| ), |
| body1: body1.apply( |
| color: bodyColor, |
| decoration: decoration, |
| decorationColor: decorationColor, |
| decorationStyle: decorationStyle, |
| fontFamily: fontFamily, |
| fontSizeFactor: fontSizeFactor, |
| fontSizeDelta: fontSizeDelta, |
| ), |
| caption: caption.apply( |
| color: displayColor, |
| decoration: decoration, |
| decorationColor: decorationColor, |
| decorationStyle: decorationStyle, |
| fontFamily: fontFamily, |
| fontSizeFactor: fontSizeFactor, |
| fontSizeDelta: fontSizeDelta, |
| ), |
| button: button.apply( |
| color: bodyColor, |
| decoration: decoration, |
| decorationColor: decorationColor, |
| decorationStyle: decorationStyle, |
| fontFamily: fontFamily, |
| fontSizeFactor: fontSizeFactor, |
| fontSizeDelta: fontSizeDelta, |
| ), |
| ); |
| } |
| |
| /// Linearly interpolate between two text themes. |
| /// |
| /// The arguments must not be null. |
| /// |
| /// The `t` argument represents position on the timeline, with 0.0 meaning |
| /// that the interpolation has not started, returning `a` (or something |
| /// equivalent to `a`), 1.0 meaning that the interpolation has finished, |
| /// returning `b` (or something equivalent to `b`), and values in between |
| /// meaning that the interpolation is at the relevant point on the timeline |
| /// between `a` and `b`. The interpolation can be extrapolated beyond 0.0 and |
| /// 1.0, so negative values and values greater than 1.0 are valid (and can |
| /// easily be generated by curves such as [Curves.elasticInOut]). |
| /// |
| /// Values for `t` are usually obtained from an [Animation<double>], such as |
| /// an [AnimationController]. |
| static TextTheme lerp(TextTheme a, TextTheme b, double t) { |
| assert(a != null); |
| assert(b != null); |
| assert(t != null); |
| return new TextTheme( |
| display4: TextStyle.lerp(a.display4, b.display4, t), |
| display3: TextStyle.lerp(a.display3, b.display3, t), |
| display2: TextStyle.lerp(a.display2, b.display2, t), |
| display1: TextStyle.lerp(a.display1, b.display1, t), |
| headline: TextStyle.lerp(a.headline, b.headline, t), |
| title: TextStyle.lerp(a.title, b.title, t), |
| subhead: TextStyle.lerp(a.subhead, b.subhead, t), |
| body2: TextStyle.lerp(a.body2, b.body2, t), |
| body1: TextStyle.lerp(a.body1, b.body1, t), |
| caption: TextStyle.lerp(a.caption, b.caption, t), |
| button: TextStyle.lerp(a.button, b.button, t), |
| ); |
| } |
| |
| @override |
| bool operator ==(dynamic other) { |
| if (identical(this, other)) |
| return true; |
| if (other.runtimeType != runtimeType) |
| return false; |
| final TextTheme typedOther = other; |
| return display4 == typedOther.display4 && |
| display3 == typedOther.display3 && |
| display2 == typedOther.display2 && |
| display1 == typedOther.display1 && |
| headline == typedOther.headline && |
| title == typedOther.title && |
| subhead == typedOther.subhead && |
| body2 == typedOther.body2 && |
| body1 == typedOther.body1 && |
| caption == typedOther.caption && |
| button == typedOther.button; |
| } |
| |
| @override |
| int get hashCode { |
| return hashValues( |
| display4, |
| display3, |
| display2, |
| display1, |
| headline, |
| title, |
| subhead, |
| body2, |
| body1, |
| caption, |
| button, |
| ); |
| } |
| |
| @override |
| void debugFillProperties(DiagnosticPropertiesBuilder properties) { |
| super.debugFillProperties(properties); |
| final TextTheme defaultTheme = new Typography(platform: defaultTargetPlatform).black; |
| properties.add(new DiagnosticsProperty<TextStyle>('display4', display4, |
| defaultValue: defaultTheme.display4)); |
| properties.add(new DiagnosticsProperty<TextStyle>('display3', display3, |
| defaultValue: defaultTheme.display3)); |
| properties.add(new DiagnosticsProperty<TextStyle>('display2', display2, |
| defaultValue: defaultTheme.display2)); |
| properties.add(new DiagnosticsProperty<TextStyle>('display1', display1, |
| defaultValue: defaultTheme.display1)); |
| properties.add(new DiagnosticsProperty<TextStyle>('headline', headline, |
| defaultValue: defaultTheme.headline)); |
| properties |
| .add(new DiagnosticsProperty<TextStyle>('title', title, defaultValue: defaultTheme.title)); |
| properties.add( |
| new DiagnosticsProperty<TextStyle>('subhead', subhead, defaultValue: defaultTheme.subhead)); |
| properties |
| .add(new DiagnosticsProperty<TextStyle>('body2', body2, defaultValue: defaultTheme.body2)); |
| properties |
| .add(new DiagnosticsProperty<TextStyle>('body1', body1, defaultValue: defaultTheme.body1)); |
| properties.add( |
| new DiagnosticsProperty<TextStyle>('caption', caption, defaultValue: defaultTheme.caption)); |
| properties.add( |
| new DiagnosticsProperty<TextStyle>('button', button, defaultValue: defaultTheme.button)); |
| } |
| } |
| |
| /// The two material design text themes. |
| /// |
| /// Material design defines two text themes: [black] and [white]. The black |
| /// text theme, which uses dark glyphs, is used on light backgrounds in light |
| /// themes. The white text theme, which uses light glyphs, is used in dark |
| /// themes and on dark backgrounds in light themes. |
| /// |
| /// To obtain the current text theme, call [Theme.of] with the current |
| /// [BuildContext] and read the [ThemeData.textTheme] property. |
| /// |
| /// See also: |
| /// |
| /// * [TextTheme], which shows what the text styles in a theme look like. |
| /// * [Theme], for other aspects of a material design application that can be |
| /// globally adjusted, such as the color scheme. |
| /// * <http://material.google.com/style/typography.html> |
| class Typography { |
| /// Creates the default typography for the specified platform. |
| factory Typography({@required TargetPlatform platform}) { |
| assert(platform != null); |
| switch (platform) { |
| case TargetPlatform.android: |
| case TargetPlatform.fuchsia: |
| return const Typography._( |
| _MaterialTextColorThemes.blackMountainView, |
| _MaterialTextColorThemes.whiteMountainView, |
| ); |
| case TargetPlatform.iOS: |
| return const Typography._( |
| _MaterialTextColorThemes.blackCupertino, |
| _MaterialTextColorThemes.whiteCupertino, |
| ); |
| } |
| return null; |
| } |
| |
| const Typography._(this.black, this.white); |
| |
| /// A material design text theme with dark glyphs. |
| final TextTheme black; |
| |
| /// A material design text theme with light glyphs. |
| final TextTheme white; |
| } |
| |
| /// Provides default text theme colors compliant with the Material Design |
| /// specification. |
| /// |
| /// The geometric font properties are missing in these color themes. App are |
| /// expected to use [Theme.of] to get [TextTheme] objects fully populated with |
| /// font properties. |
| /// |
| /// See also: https://material.io/go/design-typography |
| // TODO(yjbanov): implement font fallback (see "Font stack" at https://material.io/go/design-typography) |
| class _MaterialTextColorThemes { |
| static const TextTheme blackMountainView = const TextTheme( |
| display4: const TextStyle(debugLabel: 'blackMountainView display4', fontFamily: 'Roboto', inherit: true, color: Colors.black54, decoration: TextDecoration.none), |
| display3: const TextStyle(debugLabel: 'blackMountainView display3', fontFamily: 'Roboto', inherit: true, color: Colors.black54, decoration: TextDecoration.none), |
| display2: const TextStyle(debugLabel: 'blackMountainView display2', fontFamily: 'Roboto', inherit: true, color: Colors.black54, decoration: TextDecoration.none), |
| display1: const TextStyle(debugLabel: 'blackMountainView display1', fontFamily: 'Roboto', inherit: true, color: Colors.black54, decoration: TextDecoration.none), |
| headline: const TextStyle(debugLabel: 'blackMountainView headline', fontFamily: 'Roboto', inherit: true, color: Colors.black87, decoration: TextDecoration.none), |
| title : const TextStyle(debugLabel: 'blackMountainView title', fontFamily: 'Roboto', inherit: true, color: Colors.black87, decoration: TextDecoration.none), |
| subhead : const TextStyle(debugLabel: 'blackMountainView subhead', fontFamily: 'Roboto', inherit: true, color: Colors.black87, decoration: TextDecoration.none), |
| body2 : const TextStyle(debugLabel: 'blackMountainView body2', fontFamily: 'Roboto', inherit: true, color: Colors.black87, decoration: TextDecoration.none), |
| body1 : const TextStyle(debugLabel: 'blackMountainView body1', fontFamily: 'Roboto', inherit: true, color: Colors.black87, decoration: TextDecoration.none), |
| caption : const TextStyle(debugLabel: 'blackMountainView caption', fontFamily: 'Roboto', inherit: true, color: Colors.black54, decoration: TextDecoration.none), |
| button : const TextStyle(debugLabel: 'blackMountainView button', fontFamily: 'Roboto', inherit: true, color: Colors.black87, decoration: TextDecoration.none), |
| ); |
| |
| static const TextTheme whiteMountainView = const TextTheme( |
| display4: const TextStyle(debugLabel: 'whiteMountainView display4', fontFamily: 'Roboto', inherit: true, color: Colors.white70, decoration: TextDecoration.none), |
| display3: const TextStyle(debugLabel: 'whiteMountainView display3', fontFamily: 'Roboto', inherit: true, color: Colors.white70, decoration: TextDecoration.none), |
| display2: const TextStyle(debugLabel: 'whiteMountainView display2', fontFamily: 'Roboto', inherit: true, color: Colors.white70, decoration: TextDecoration.none), |
| display1: const TextStyle(debugLabel: 'whiteMountainView display1', fontFamily: 'Roboto', inherit: true, color: Colors.white70, decoration: TextDecoration.none), |
| headline: const TextStyle(debugLabel: 'whiteMountainView headline', fontFamily: 'Roboto', inherit: true, color: Colors.white, decoration: TextDecoration.none), |
| title : const TextStyle(debugLabel: 'whiteMountainView title', fontFamily: 'Roboto', inherit: true, color: Colors.white, decoration: TextDecoration.none), |
| subhead : const TextStyle(debugLabel: 'whiteMountainView subhead', fontFamily: 'Roboto', inherit: true, color: Colors.white, decoration: TextDecoration.none), |
| body2 : const TextStyle(debugLabel: 'whiteMountainView body2', fontFamily: 'Roboto', inherit: true, color: Colors.white, decoration: TextDecoration.none), |
| body1 : const TextStyle(debugLabel: 'whiteMountainView body1', fontFamily: 'Roboto', inherit: true, color: Colors.white, decoration: TextDecoration.none), |
| caption : const TextStyle(debugLabel: 'whiteMountainView caption', fontFamily: 'Roboto', inherit: true, color: Colors.white70, decoration: TextDecoration.none), |
| button : const TextStyle(debugLabel: 'whiteMountainView button', fontFamily: 'Roboto', inherit: true, color: Colors.white, decoration: TextDecoration.none), |
| ); |
| |
| static const TextTheme blackCupertino = const TextTheme( |
| display4: const TextStyle(debugLabel: 'blackCupertino display4', fontFamily: '.SF UI Display', inherit: true, color: Colors.black54, decoration: TextDecoration.none), |
| display3: const TextStyle(debugLabel: 'blackCupertino display3', fontFamily: '.SF UI Display', inherit: true, color: Colors.black54, decoration: TextDecoration.none), |
| display2: const TextStyle(debugLabel: 'blackCupertino display2', fontFamily: '.SF UI Display', inherit: true, color: Colors.black54, decoration: TextDecoration.none), |
| display1: const TextStyle(debugLabel: 'blackCupertino display1', fontFamily: '.SF UI Display', inherit: true, color: Colors.black54, decoration: TextDecoration.none), |
| headline: const TextStyle(debugLabel: 'blackCupertino headline', fontFamily: '.SF UI Display', inherit: true, color: Colors.black87, decoration: TextDecoration.none), |
| title : const TextStyle(debugLabel: 'blackCupertino title', fontFamily: '.SF UI Display', inherit: true, color: Colors.black87, decoration: TextDecoration.none), |
| subhead : const TextStyle(debugLabel: 'blackCupertino subhead', fontFamily: '.SF UI Text', inherit: true, color: Colors.black87, decoration: TextDecoration.none), |
| body2 : const TextStyle(debugLabel: 'blackCupertino body2', fontFamily: '.SF UI Text', inherit: true, color: Colors.black87, decoration: TextDecoration.none), |
| body1 : const TextStyle(debugLabel: 'blackCupertino body1', fontFamily: '.SF UI Text', inherit: true, color: Colors.black87, decoration: TextDecoration.none), |
| caption : const TextStyle(debugLabel: 'blackCupertino caption', fontFamily: '.SF UI Text', inherit: true, color: Colors.black54, decoration: TextDecoration.none), |
| button : const TextStyle(debugLabel: 'blackCupertino button', fontFamily: '.SF UI Text', inherit: true, color: Colors.black87, decoration: TextDecoration.none), |
| ); |
| |
| static const TextTheme whiteCupertino = const TextTheme( |
| display4: const TextStyle(debugLabel: 'whiteCupertino display4', fontFamily: '.SF UI Display', inherit: true, color: Colors.white70, decoration: TextDecoration.none), |
| display3: const TextStyle(debugLabel: 'whiteCupertino display3', fontFamily: '.SF UI Display', inherit: true, color: Colors.white70, decoration: TextDecoration.none), |
| display2: const TextStyle(debugLabel: 'whiteCupertino display2', fontFamily: '.SF UI Display', inherit: true, color: Colors.white70, decoration: TextDecoration.none), |
| display1: const TextStyle(debugLabel: 'whiteCupertino display1', fontFamily: '.SF UI Display', inherit: true, color: Colors.white70, decoration: TextDecoration.none), |
| headline: const TextStyle(debugLabel: 'whiteCupertino headline', fontFamily: '.SF UI Display', inherit: true, color: Colors.white, decoration: TextDecoration.none), |
| title : const TextStyle(debugLabel: 'whiteCupertino title', fontFamily: '.SF UI Display', inherit: true, color: Colors.white, decoration: TextDecoration.none), |
| subhead : const TextStyle(debugLabel: 'whiteCupertino subhead', fontFamily: '.SF UI Text', inherit: true, color: Colors.white, decoration: TextDecoration.none), |
| body2 : const TextStyle(debugLabel: 'whiteCupertino body2', fontFamily: '.SF UI Text', inherit: true, color: Colors.white, decoration: TextDecoration.none), |
| body1 : const TextStyle(debugLabel: 'whiteCupertino body1', fontFamily: '.SF UI Text', inherit: true, color: Colors.white, decoration: TextDecoration.none), |
| caption : const TextStyle(debugLabel: 'whiteCupertino caption', fontFamily: '.SF UI Text', inherit: true, color: Colors.white70, decoration: TextDecoration.none), |
| button : const TextStyle(debugLabel: 'whiteCupertino button', fontFamily: '.SF UI Text', inherit: true, color: Colors.white, decoration: TextDecoration.none), |
| ); |
| } |
| |
| /// Defines text geometries for the three language categories defined in |
| /// https://material.io/go/design-typography. |
| class MaterialTextGeometry { |
| /// The name of the English-like script category. |
| static const String englishLikeCategory = 'English-like'; |
| |
| /// The name of the dense script category. |
| static const String denseCategory = 'dense'; |
| |
| /// The name of the tall script category. |
| static const String tallCategory = 'tall'; |
| |
| /// The mapping from script category names to text themes. |
| static const Map<String, TextTheme> _categoryToTextTheme = const <String, TextTheme>{ |
| englishLikeCategory: englishLike, |
| denseCategory: dense, |
| tallCategory: tall, |
| }; |
| |
| /// Looks up text geometry corresponding to the given [scriptCategoryName]. |
| /// |
| /// Most apps would not call this method directly, but rather call [Theme.of] |
| /// and use the [TextTheme] fields of the returned [ThemeData] object. |
| /// |
| /// [scriptCategoryName] must be one of [englishLikeCategory], [denseCategory] |
| /// and [tallCategory]. |
| /// |
| /// See also: |
| /// |
| /// * [DefaultMaterialLocalizations.localTextGeometry], which uses this |
| /// method to look-up text geometry for the current locale. |
| static TextTheme forScriptCategory(String scriptCategoryName) => _categoryToTextTheme[scriptCategoryName]; |
| |
| /// Defines text geometry for English-like scripts, such as English, French, Russian, etc. |
| static const TextTheme englishLike = const TextTheme( |
| display4: const TextStyle(debugLabel: 'englishLike display4', inherit: false, fontSize: 112.0, fontWeight: FontWeight.w100, textBaseline: TextBaseline.alphabetic), |
| display3: const TextStyle(debugLabel: 'englishLike display3', inherit: false, fontSize: 56.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| display2: const TextStyle(debugLabel: 'englishLike display2', inherit: false, fontSize: 45.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| display1: const TextStyle(debugLabel: 'englishLike display1', inherit: false, fontSize: 34.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| headline: const TextStyle(debugLabel: 'englishLike headline', inherit: false, fontSize: 24.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| title : const TextStyle(debugLabel: 'englishLike title', inherit: false, fontSize: 20.0, fontWeight: FontWeight.w500, textBaseline: TextBaseline.alphabetic), |
| subhead : const TextStyle(debugLabel: 'englishLike subhead', inherit: false, fontSize: 16.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| body2 : const TextStyle(debugLabel: 'englishLike body2', inherit: false, fontSize: 14.0, fontWeight: FontWeight.w500, textBaseline: TextBaseline.alphabetic), |
| body1 : const TextStyle(debugLabel: 'englishLike body1', inherit: false, fontSize: 14.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| caption : const TextStyle(debugLabel: 'englishLike caption', inherit: false, fontSize: 12.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| button : const TextStyle(debugLabel: 'englishLike button', inherit: false, fontSize: 14.0, fontWeight: FontWeight.w500, textBaseline: TextBaseline.alphabetic), |
| ); |
| |
| /// Defines text geometry for dense scripts, such as Chinese, Japanese, Korean, etc. |
| static const TextTheme dense = const TextTheme( |
| display4: const TextStyle(debugLabel: 'dense display4', inherit: false, fontSize: 112.0, fontWeight: FontWeight.w100, textBaseline: TextBaseline.ideographic), |
| display3: const TextStyle(debugLabel: 'dense display3', inherit: false, fontSize: 56.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic), |
| display2: const TextStyle(debugLabel: 'dense display2', inherit: false, fontSize: 45.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic), |
| display1: const TextStyle(debugLabel: 'dense display1', inherit: false, fontSize: 34.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic), |
| headline: const TextStyle(debugLabel: 'dense headline', inherit: false, fontSize: 24.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic), |
| title : const TextStyle(debugLabel: 'dense title', inherit: false, fontSize: 21.0, fontWeight: FontWeight.w500, textBaseline: TextBaseline.ideographic), |
| subhead : const TextStyle(debugLabel: 'dense subhead', inherit: false, fontSize: 17.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic), |
| body2 : const TextStyle(debugLabel: 'dense body2', inherit: false, fontSize: 15.0, fontWeight: FontWeight.w500, textBaseline: TextBaseline.ideographic), |
| body1 : const TextStyle(debugLabel: 'dense body1', inherit: false, fontSize: 15.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic), |
| caption : const TextStyle(debugLabel: 'dense caption', inherit: false, fontSize: 13.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic), |
| button : const TextStyle(debugLabel: 'dense button', inherit: false, fontSize: 15.0, fontWeight: FontWeight.w500, textBaseline: TextBaseline.ideographic), |
| ); |
| |
| /// Defines text geometry for tall scripts, such as Farsi, Hindi, Thai, etc. |
| static const TextTheme tall = const TextTheme( |
| display4: const TextStyle(debugLabel: 'tall display4', inherit: false, fontSize: 112.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| display3: const TextStyle(debugLabel: 'tall display3', inherit: false, fontSize: 56.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| display2: const TextStyle(debugLabel: 'tall display2', inherit: false, fontSize: 45.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| display1: const TextStyle(debugLabel: 'tall display1', inherit: false, fontSize: 34.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| headline: const TextStyle(debugLabel: 'tall headline', inherit: false, fontSize: 24.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| title : const TextStyle(debugLabel: 'tall title', inherit: false, fontSize: 21.0, fontWeight: FontWeight.w700, textBaseline: TextBaseline.alphabetic), |
| subhead : const TextStyle(debugLabel: 'tall subhead', inherit: false, fontSize: 17.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| body2 : const TextStyle(debugLabel: 'tall body2', inherit: false, fontSize: 15.0, fontWeight: FontWeight.w700, textBaseline: TextBaseline.alphabetic), |
| body1 : const TextStyle(debugLabel: 'tall body1', inherit: false, fontSize: 15.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| caption : const TextStyle(debugLabel: 'tall caption', inherit: false, fontSize: 13.0, fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic), |
| button : const TextStyle(debugLabel: 'tall button', inherit: false, fontSize: 15.0, fontWeight: FontWeight.w700, textBaseline: TextBaseline.alphabetic), |
| ); |
| } |
