Add proper disabled values for input chips (#120192)

* add proper disabled values for input chips

* added test

dev/tools/gen_defaults/lib/input_chip_template.dart

@@ -13,7 +13,7 @@ class InputChipTemplate extends TokenTemplate {
   @override
   String generate() => '''
 class _${blockName}DefaultsM3 extends ChipThemeData {
-  const _${blockName}DefaultsM3(this.context, this.isEnabled)
+  const _${blockName}DefaultsM3(this.context, this.isEnabled, this.isSelected)
     : super(
         elevation: ${elevation("$tokenGroup$variant.container")},
         shape: ${shape("$tokenGroup.container")},
@@ -22,6 +22,7 @@ class _${blockName}DefaultsM3 extends ChipThemeData {
 
   final BuildContext context;
   final bool isEnabled;
+  final bool isSelected;
 
   @override
   TextStyle? get labelStyle => ${textStyle("$tokenGroup.label-text")};
@@ -36,7 +37,9 @@ class _${blockName}DefaultsM3 extends ChipThemeData {
   Color? get surfaceTintColor => ${colorOrTransparent("$tokenGroup.container.surface-tint-layer.color")};
 
   @override
-  Color? get selectedColor => ${componentColor("$tokenGroup$variant.selected.container")};
+  Color? get selectedColor => isEnabled
+    ? ${componentColor("$tokenGroup$variant.selected.container")}
+    : ${componentColor("$tokenGroup$variant.disabled.selected.container")};
 
   @override
   Color? get checkmarkColor => ${color("$tokenGroup.with-icon.selected.icon.color")};
@@ -48,9 +51,11 @@ class _${blockName}DefaultsM3 extends ChipThemeData {
   Color? get deleteIconColor => ${color("$tokenGroup.with-trailing-icon.selected.trailing-icon.color")};
 
   @override
-  BorderSide? get side => isEnabled
+  BorderSide? get side => !isSelected
+    ? isEnabled
       ? ${border('$tokenGroup$variant.unselected.outline')}
-    : ${border('$tokenGroup$variant.disabled.unselected.outline')};
+      : ${border('$tokenGroup$variant.disabled.unselected.outline')}
+    : const BorderSide(color: Colors.transparent);
 
   @override
   IconThemeData? get iconTheme => IconThemeData(

packages/flutter/lib/src/material/input_chip.dart

@@ -194,7 +194,7 @@ class InputChip extends StatelessWidget
   Widget build(BuildContext context) {
     assert(debugCheckHasMaterial(context));
     final ChipThemeData? defaults = Theme.of(context).useMaterial3
-      ? _InputChipDefaultsM3(context, isEnabled)
+      ? _InputChipDefaultsM3(context, isEnabled, selected)
       : null;
     final Widget? resolvedDeleteIcon = deleteIcon
       ?? (Theme.of(context).useMaterial3 ? const Icon(Icons.clear, size: 18) : null);
@@ -247,7 +247,7 @@ class InputChip extends StatelessWidget
 // Token database version: v0_158
 
 class _InputChipDefaultsM3 extends ChipThemeData {
-  const _InputChipDefaultsM3(this.context, this.isEnabled)
+  const _InputChipDefaultsM3(this.context, this.isEnabled, this.isSelected)
     : super(
         elevation: 0.0,
         shape: const RoundedRectangleBorder(borderRadius: BorderRadius.all(Radius.circular(8.0))),
@@ -256,6 +256,7 @@ class _InputChipDefaultsM3 extends ChipThemeData {
 
   final BuildContext context;
   final bool isEnabled;
+  final bool isSelected;
 
   @override
   TextStyle? get labelStyle => Theme.of(context).textTheme.labelLarge;
@@ -270,7 +271,9 @@ class _InputChipDefaultsM3 extends ChipThemeData {
   Color? get surfaceTintColor => Colors.transparent;
 
   @override
-  Color? get selectedColor => Theme.of(context).colorScheme.secondaryContainer;
+  Color? get selectedColor => isEnabled
+    ? Theme.of(context).colorScheme.secondaryContainer
+    : Theme.of(context).colorScheme.onSurface.withOpacity(0.12);
 
   @override
   Color? get checkmarkColor => null;
@@ -282,9 +285,11 @@ class _InputChipDefaultsM3 extends ChipThemeData {
   Color? get deleteIconColor => Theme.of(context).colorScheme.onSecondaryContainer;
 
   @override
-  BorderSide? get side => isEnabled
+  BorderSide? get side => !isSelected
+    ? isEnabled
       ? BorderSide(color: Theme.of(context).colorScheme.outline)
-    : BorderSide(color: Theme.of(context).colorScheme.onSurface.withOpacity(0.12));
+      : BorderSide(color: Theme.of(context).colorScheme.onSurface.withOpacity(0.12))
+    : const BorderSide(color: Colors.transparent);
 
   @override
   IconThemeData? get iconTheme => IconThemeData(

packages/flutter/test/material/input_chip_test.dart

@@ -13,9 +13,10 @@ Widget wrapForChip({
   TextDirection textDirection = TextDirection.ltr,
   double textScaleFactor = 1.0,
   Brightness brightness = Brightness.light,
+  bool useMaterial3 = false,
 }) {
   return MaterialApp(
-    theme: ThemeData(brightness: brightness),
+    theme: ThemeData(brightness: brightness, useMaterial3: useMaterial3),
     home: Directionality(
       textDirection: textDirection,
       child: MediaQuery(
@@ -26,10 +27,14 @@ Widget wrapForChip({
   );
 }
 
-Widget selectedInputChip({ Color? checkmarkColor }) {
+Widget selectedInputChip({
+  Color? checkmarkColor,
+  bool enabled = false,
+}) {
   return InputChip(
     label: const Text('InputChip'),
     selected: true,
+    isEnabled: enabled,
     showCheckmark: true,
     checkmarkColor: checkmarkColor,
   );
@@ -41,9 +46,11 @@ Future<void> pumpCheckmarkChip(
   required Widget chip,
   Color? themeColor,
   Brightness brightness = Brightness.light,
+  bool useMaterial3 = false,
 }) async {
   await tester.pumpWidget(
     wrapForChip(
+      useMaterial3: useMaterial3,
       brightness: brightness,
       child: Builder(
         builder: (BuildContext context) {
@@ -75,6 +82,15 @@ void expectCheckmarkColor(Finder finder, Color color) {
   );
 }
 
+RenderBox getMaterialBox(WidgetTester tester) {
+  return tester.firstRenderObject<RenderBox>(
+    find.descendant(
+      of: find.byType(InputChip),
+      matching: find.byType(CustomPaint),
+    ),
+  );
+}
+
 void checkChipMaterialClipBehavior(WidgetTester tester, Clip clipBehavior) {
   final Iterable<Material> materials = tester.widgetList<Material>(find.byType(Material));
   // There should be two Material widgets, first Material is from the "_wrapForChip" and
@@ -238,4 +254,28 @@ void main() {
     await tester.pumpWidget(wrapForChip(child: const InputChip(label: label, clipBehavior: Clip.antiAlias)));
     checkChipMaterialClipBehavior(tester, Clip.antiAlias);
   });
+
+  testWidgets('Input chip has correct selected color when enabled - M3 defaults', (WidgetTester tester) async {
+    final ChipThemeData material3ChipDefaults = ThemeData(useMaterial3: true).chipTheme;
+    await pumpCheckmarkChip(
+      tester,
+      chip: selectedInputChip(enabled: true),
+      useMaterial3: true,
+    );
+
+    final RenderBox materialBox = getMaterialBox(tester);
+    expect(materialBox, paints..rrect(color: material3ChipDefaults.backgroundColor));
+  });
+
+  testWidgets('Input chip has correct selected color when disabled - M3 defaults', (WidgetTester tester) async {
+    final ChipThemeData material3ChipDefaults = ThemeData(useMaterial3: true).chipTheme;
+    await pumpCheckmarkChip(
+      tester,
+      chip: selectedInputChip(),
+      useMaterial3: true,
+    );
+
+    final RenderBox materialBox = getMaterialBox(tester);
+    expect(materialBox, paints..path(color: material3ChipDefaults.disabledColor));
+  });
 }