// 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 NavigationBarTemplate extends TokenTemplate { const NavigationBarTemplate(super.blockName, super.fileName, super.tokens, { super.colorSchemePrefix = '_colors.', super.textThemePrefix = '_textTheme.', }); @override String generate() => ''' class _${blockName}DefaultsM3 extends NavigationBarThemeData { _${blockName}DefaultsM3(this.context) : super( height: ${getToken("md.comp.navigation-bar.container.height")}, elevation: ${elevation("md.comp.navigation-bar.container")}, labelBehavior: NavigationDestinationLabelBehavior.alwaysShow, ); final BuildContext context; late final ColorScheme _colors = Theme.of(context).colorScheme; late final TextTheme _textTheme = Theme.of(context).textTheme; @override Color? get backgroundColor => ${componentColor("md.comp.navigation-bar.container")}; @override Color? get shadowColor => ${colorOrTransparent("md.comp.navigation-bar.container.shadow-color")}; @override Color? get surfaceTintColor => ${colorOrTransparent("md.comp.navigation-bar.container.surface-tint-layer.color")}; @override MaterialStateProperty<IconThemeData?>? get iconTheme { return MaterialStateProperty.resolveWith((Set<MaterialState> states) { return IconThemeData( size: ${getToken("md.comp.navigation-bar.icon.size")}, color: states.contains(MaterialState.disabled) ? _colors.onSurfaceVariant.withOpacity(0.38) : states.contains(MaterialState.selected) ? ${componentColor("md.comp.navigation-bar.active.icon")} : ${componentColor("md.comp.navigation-bar.inactive.icon")}, ); }); } @override Color? get indicatorColor => ${componentColor("md.comp.navigation-bar.active-indicator")}; @override ShapeBorder? get indicatorShape => ${shape("md.comp.navigation-bar.active-indicator")}; @override MaterialStateProperty<TextStyle?>? get labelTextStyle { return MaterialStateProperty.resolveWith((Set<MaterialState> states) { final TextStyle style = ${textStyle("md.comp.navigation-bar.label-text")}!; return style.apply( color: states.contains(MaterialState.disabled) ? _colors.onSurfaceVariant.withOpacity(0.38) : states.contains(MaterialState.selected) ? ${componentColor("md.comp.navigation-bar.active.label-text")} : ${componentColor("md.comp.navigation-bar.inactive.label-text")} ); }); } } '''; }