blob: 6609613cde24eb80f4dc9b184ffafd8ef4509428 [file] [log] [blame]
// 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 FilterChipTemplate extends TokenTemplate {
const FilterChipTemplate(super.blockName, super.fileName, super.tokens, {
super.colorSchemePrefix = '_colors.',
super.textThemePrefix = '_textTheme.'
});
static const String tokenGroup = 'md.comp.filter-chip';
static const String flatVariant = '.flat';
static const String elevatedVariant = '.elevated';
@override
String generate() => '''
class _${blockName}DefaultsM3 extends ChipThemeData {
_${blockName}DefaultsM3(
this.context,
this.isEnabled,
this.isSelected,
this._chipVariant,
) : super(
shape: ${shape("$tokenGroup.container")},
showCheckmark: true,
);
final BuildContext context;
final bool isEnabled;
final bool isSelected;
final _ChipVariant _chipVariant;
late final ColorScheme _colors = Theme.of(context).colorScheme;
late final TextTheme _textTheme = Theme.of(context).textTheme;
@override
double? get elevation => _chipVariant == _ChipVariant.flat
? ${elevation("$tokenGroup$flatVariant.container")}
: isEnabled ? ${elevation("$tokenGroup$elevatedVariant.container")} : ${elevation("$tokenGroup$elevatedVariant.disabled.container")};
@override
double? get pressElevation => ${elevation("$tokenGroup$elevatedVariant.pressed.container")};
@override
TextStyle? get labelStyle => ${textStyle("$tokenGroup.label-text")};
@override
MaterialStateProperty<Color?>? get color =>
MaterialStateProperty.resolveWith((Set<MaterialState> states) {
if (states.contains(MaterialState.selected) && states.contains(MaterialState.disabled)) {
return _chipVariant == _ChipVariant.flat
? ${componentColor("$tokenGroup$flatVariant.disabled.selected.container")}
: ${componentColor("$tokenGroup$elevatedVariant.disabled.container")};
}
if (states.contains(MaterialState.disabled)) {
return _chipVariant == _ChipVariant.flat
? ${componentColor("$tokenGroup$flatVariant.disabled.unselected.container")}
: ${componentColor("$tokenGroup$elevatedVariant.disabled.container")};
}
if (states.contains(MaterialState.selected)) {
return _chipVariant == _ChipVariant.flat
? ${componentColor("$tokenGroup$flatVariant.selected.container")}
: ${componentColor("$tokenGroup$elevatedVariant.selected.container")};
}
return _chipVariant == _ChipVariant.flat
? ${componentColor("$tokenGroup$flatVariant.container")}
: ${componentColor("$tokenGroup$elevatedVariant.container")};
});
@override
Color? get shadowColor => _chipVariant == _ChipVariant.flat
? ${colorOrTransparent("$tokenGroup$flatVariant.container.shadow-color")}
: ${colorOrTransparent("$tokenGroup$elevatedVariant.container.shadow-color")};
@override
Color? get surfaceTintColor => ${colorOrTransparent("$tokenGroup.container.surface-tint-layer.color")};
@override
Color? get checkmarkColor => ${color("$tokenGroup.with-leading-icon.selected.leading-icon.color")};
@override
Color? get deleteIconColor => ${color("$tokenGroup.with-trailing-icon.selected.trailing-icon.color")};
@override
BorderSide? get side => _chipVariant == _ChipVariant.flat && !isSelected
? isEnabled
? ${border('$tokenGroup$flatVariant.unselected.outline')}
: ${border('$tokenGroup$flatVariant.disabled.unselected.outline')}
: const BorderSide(color: Colors.transparent);
@override
IconThemeData? get iconTheme => IconThemeData(
color: isEnabled
? ${color("$tokenGroup.with-icon.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 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.textScaleFactorOf(context) - 1.0, 0.0, 1.0),
)!;
}
''';
}