// 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.filter-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")}?.copyWith( color: isEnabled ? ${color("$tokenGroup.unselected.label-text.color")} : ${color("$tokenGroup.disabled.label-text.color")}, ); @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 => null; @override Color? get deleteIconColor => isEnabled ? ${color("$tokenGroup.with-trailing-icon.unselected.trailing-icon.color")} : ${color("$tokenGroup.with-trailing-icon.disabled.trailing-icon.color")}; @override BorderSide? get side => isEnabled ? ${border('$tokenGroup$variant.unselected.outline')} : ${border('$tokenGroup$variant.disabled.unselected.outline')}; @override IconThemeData? get iconTheme => IconThemeData( color: isEnabled ? ${color("$tokenGroup.with-leading-icon.unselected.leading-icon.color")} : ${color("$tokenGroup.with-leading-icon.disabled.leading-icon.color")}, size: ${getToken("$tokenGroup.with-icon.icon.size")}, ); @override EdgeInsetsGeometry? get padding => const EdgeInsets.all(8.0); /// The label padding of the chip scales with the font size specified in the /// [labelStyle], and the system font size settings that scale font sizes /// globally. /// /// The chip at effective font size 14.0 starts with 8px on each side and as /// the font size scales up to closer to 28.0, the label padding is linearly /// interpolated from 8px to 4px. Once the label has a font size of 2 or /// higher, label padding remains 4px. @override EdgeInsetsGeometry? get labelPadding { final double fontSize = labelStyle?.fontSize ?? 14.0; final double fontSizeRatio = MediaQuery.textScalerOf(context).scale(fontSize) / 14.0; return EdgeInsets.lerp( const EdgeInsets.symmetric(horizontal: 8.0), const EdgeInsets.symmetric(horizontal: 4.0), clampDouble(fontSizeRatio - 1.0, 0.0, 1.0), )!; } } '''; }