feat: Create DefaultTextStyle Modifier

packages/mix/lib/src/modifiers/default_text_style_widget_modifier.dart

@@ -0,0 +1,84 @@
+// ignore_for_file: prefer-named-boolean-parameters
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/widgets.dart';
+import 'package:mix_annotations/mix_annotations.dart';
+
+import '../attributes/text_height_behavior/text_height_behavior_dto.dart';
+import '../attributes/text_style/text_style_dto.dart';
+import '../core/element.dart';
+import '../core/factory/mix_data.dart';
+import '../core/helpers.dart';
+import '../core/modifier.dart';
+import '../core/utility.dart';
+
+part 'default_text_style_widget_modifier.g.dart';
+
+@MixableSpec(components: GeneratedSpecComponents.skipUtility)
+final class DefaultTextStyleModifierSpec
+    extends WidgetModifierSpec<DefaultTextStyleModifierSpec>
+    with _$DefaultTextStyleModifierSpec, Diagnosticable {
+  final TextStyle? style;
+  final TextAlign? textAlign;
+  final bool? softWrap;
+  final TextOverflow? overflow;
+  final int? maxLines;
+  final TextWidthBasis? textWidthBasis;
+  final TextHeightBehavior? textHeightBehavior;
+
+  const DefaultTextStyleModifierSpec({
+    this.style,
+    this.textAlign,
+    this.softWrap,
+    this.overflow,
+    this.maxLines,
+    this.textWidthBasis,
+    this.textHeightBehavior,
+  });
+
+  @override
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    _debugFillProperties(properties);
+  }
+
+  @override
+  Widget build(Widget child) {
+    return DefaultTextStyle(
+      style: style ?? const TextStyle(),
+      textAlign: textAlign,
+      softWrap: softWrap ?? true,
+      overflow: overflow ?? TextOverflow.clip,
+      maxLines: maxLines,
+      textWidthBasis: textWidthBasis ?? TextWidthBasis.parent,
+      textHeightBehavior: textHeightBehavior,
+      child: child,
+    );
+  }
+}
+
+final class DefaultTextStyleModifierSpecUtility<T extends Attribute>
+    extends MixUtility<T, DefaultTextStyleModifierSpecAttribute> {
+  const DefaultTextStyleModifierSpecUtility(super.builder);
+  T call({
+    TextStyle? style,
+    TextAlign? textAlign,
+    bool? softWrap,
+    TextOverflow? overflow,
+    int? maxLines,
+    TextWidthBasis? textWidthBasis,
+    TextHeightBehavior? textHeightBehavior,
+  }) {
+    return builder(
+      DefaultTextStyleModifierSpecAttribute(
+        style: style?.toDto(),
+        textAlign: textAlign,
+        softWrap: softWrap,
+        overflow: overflow,
+        maxLines: maxLines,
+        textWidthBasis: textWidthBasis,
+        textHeightBehavior: textHeightBehavior?.toDto(),
+      ),
+    );
+  }
+}

packages/mix/lib/src/modifiers/widget_modifiers_util.dart

@@ -4,6 +4,7 @@ import '../core/utility.dart';
 import 'align_widget_modifier.dart';
 import 'aspect_ratio_widget_modifier.dart';
 import 'clip_widget_modifier.dart';
+import 'default_text_style_widget_modifier.dart';
 import 'flexible_widget_modifier.dart';
 import 'fractionally_sized_box_widget_modifier.dart';
 import 'intrinsic_widget_modifier.dart';
@@ -34,6 +35,7 @@ abstract class ModifierUtility<T extends StyleElement, Value>
   late final flexible = FlexibleModifierSpecUtility(only);
   late final expanded = flexible.expanded;
   late final transform = TransformModifierSpecUtility(only);
+  late final defaultTextStyle = DefaultTextStyleModifierSpecUtility(only);
 
   late final scale = transform.scale;
   late final align = AlignModifierSpecUtility(only);

packages/mix/test/modifiers/default_text_style_widget_modifier_test.dart

@@ -0,0 +1,29 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:mix/mix.dart';
+
+void main() {
+  group('DefaultTextStyleModifierSpec', () {
+    testWidgets('should wrap the widget with DefaultTextStyle', (tester) async {
+      await tester.pumpWidget(
+        Directionality(
+          textDirection: TextDirection.ltr,
+          child: Box(
+            style: Style(
+              $with.defaultTextStyle(
+                style: const TextStyle(fontSize: 20, color: Colors.red),
+              ),
+            ),
+            child: const Text('Hello, world!'),
+          ),
+        ),
+      );
+
+      final context = tester.element(find.text('Hello, world!'));
+      final defaultTextStyle = DefaultTextStyle.of(context);
+
+      expect(defaultTextStyle.style.fontSize, 20);
+      expect(defaultTextStyle.style.color, Colors.red);
+    });
+  });
+}