// 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 'template.dart'; class ChipTemplate extends TokenTemplate { const ChipTemplate(super.blockName, super.fileName, super.tokens, { super.colorSchemePrefix = '_colors.', super.textThemePrefix = '_textTheme.' }); static const String tokenGroup = 'md.comp.assist-chip'; static const String variant = '.flat'; @override String generate() => ''' class _${blockName}DefaultsM3 extends ChipThemeData { _${blockName}DefaultsM3(this.context, this.isEnabled) : super( elevation: ${elevation("$tokenGroup$variant.container")}, shape: ${shape("$tokenGroup.container")}, showCheckmark: true, ); final BuildContext context; final bool isEnabled; late final ColorScheme _colors = Theme.of(context).colorScheme; late final TextTheme _textTheme = Theme.of(context).textTheme; @override TextStyle? get labelStyle => ${textStyle("$tokenGroup.label-text")}; @override MaterialStateProperty<Color?>? get color => null; // Subclasses override this getter @override Color? get shadowColor => ${colorOrTransparent("$tokenGroup.container.shadow-color")}; @override Color? get surfaceTintColor => ${colorOrTransparent("$tokenGroup.container.surface-tint-layer.color")}; @override Color? get checkmarkColor => ${color("$tokenGroup.with-icon.selected.icon.color")}; @override Color? get deleteIconColor => ${color("$tokenGroup.with-icon.selected.icon.color")}; @override BorderSide? get side => isEnabled ? ${border('$tokenGroup$variant.outline')} : ${border('$tokenGroup$variant.disabled.outline')}; @override IconThemeData? get iconTheme => IconThemeData( color: isEnabled ? ${color("$tokenGroup.with-icon.icon.color")} : ${color("$tokenGroup.with-icon.disabled.icon.color")}, size: ${getToken("$tokenGroup.with-icon.icon.size")}, ); @override EdgeInsetsGeometry? get padding => const EdgeInsets.all(8.0); /// The chip at text scale 1 starts with 8px on each side and as text scaling /// gets closer to 2, the label padding is linearly interpolated from 8px to 4px. /// Once the widget has a text scaling of 2 or higher than the label padding /// remains 4px. @override EdgeInsetsGeometry? get labelPadding => EdgeInsets.lerp( const EdgeInsets.symmetric(horizontal: 8.0), const EdgeInsets.symmetric(horizontal: 4.0), clampDouble(MediaQuery.textScalerOf(context).textScaleFactor - 1.0, 0.0, 1.0), )!; } '''; }