Add textDirection property to CupertinoTextField and CupertinoTextFormFieldRow (#86482)

packages/flutter/lib/src/cupertino/text_field.dart

@@ -251,6 +251,7 @@ class CupertinoTextField extends StatefulWidget {
     this.strutStyle,
     this.textAlign = TextAlign.start,
     this.textAlignVertical,
+    this.textDirection,
     this.readOnly = false,
     ToolbarOptions? toolbarOptions,
     this.showCursor,
@@ -404,6 +405,7 @@ class CupertinoTextField extends StatefulWidget {
     this.strutStyle,
     this.textAlign = TextAlign.start,
     this.textAlignVertical,
+    this.textDirection,
     this.readOnly = false,
     ToolbarOptions? toolbarOptions,
     this.showCursor,
@@ -608,6 +610,9 @@ class CupertinoTextField extends StatefulWidget {
   /// {@macro flutter.material.InputDecorator.textAlignVertical}
   final TextAlignVertical? textAlignVertical;
 
+  /// {@macro flutter.widgets.editableText.textDirection}
+  final TextDirection? textDirection;
+
   /// {@macro flutter.widgets.editableText.readOnly}
   final bool readOnly;
 
@@ -819,6 +824,7 @@ class CupertinoTextField extends StatefulWidget {
     properties.add(DiagnosticsProperty<ScrollPhysics>('scrollPhysics', scrollPhysics, defaultValue: null));
     properties.add(EnumProperty<TextAlign>('textAlign', textAlign, defaultValue: TextAlign.start));
     properties.add(DiagnosticsProperty<TextAlignVertical>('textAlignVertical', textAlignVertical, defaultValue: null));
+    properties.add(EnumProperty<TextDirection>('textDirection', textDirection, defaultValue: null));
   }
 }
 
@@ -1176,6 +1182,7 @@ class _CupertinoTextFieldState extends State<CupertinoTextField> with Restoratio
             style: textStyle,
             strutStyle: widget.strutStyle,
             textAlign: widget.textAlign,
+            textDirection: widget.textDirection,
             autofocus: widget.autofocus,
             obscuringCharacter: widget.obscuringCharacter,
             obscureText: widget.obscureText,

packages/flutter/lib/src/cupertino/text_form_field_row.dart

@@ -144,6 +144,7 @@ class CupertinoTextFormFieldRow extends FormField<String> {
     TextInputAction? textInputAction,
     TextStyle? style,
     StrutStyle? strutStyle,
+    TextDirection? textDirection,
     TextAlign textAlign = TextAlign.start,
     TextAlignVertical? textAlignVertical,
     bool autofocus = false,
@@ -238,6 +239,7 @@ class CupertinoTextFormFieldRow extends FormField<String> {
                 textAlign: textAlign,
                 textAlignVertical: textAlignVertical,
                 textCapitalization: textCapitalization,
+                textDirection: textDirection,
                 autofocus: autofocus,
                 toolbarOptions: toolbarOptions,
                 readOnly: readOnly,

packages/flutter/test/cupertino/text_field_test.dart

@@ -4779,4 +4779,32 @@ void main() {
       expect(disabledColor, isSameColorAs(const Color(0xFFFAFAFA)));
     },
   );
+
+  testWidgets('textDirection is passed to EditableText', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const CupertinoApp(
+        home: Center(
+          child: CupertinoTextField(
+            textDirection: TextDirection.ltr,
+          ),
+        ),
+      ),
+    );
+
+    final EditableText ltrWidget = tester.widget(find.byType(EditableText));
+    expect(ltrWidget.textDirection, TextDirection.ltr);
+
+    await tester.pumpWidget(
+      const CupertinoApp(
+        home: Center(
+          child: CupertinoTextField(
+            textDirection: TextDirection.rtl,
+          ),
+        ),
+      ),
+    );
+
+    final EditableText rtlWidget = tester.widget(find.byType(EditableText));
+    expect(rtlWidget.textDirection, TextDirection.rtl);
+  });
 }

packages/flutter/test/cupertino/text_form_field_row_test.dart

@@ -458,4 +458,38 @@ void main() {
     final Text errorText = tester.widget(errorTextFinder);
     expect(errorText.data, 'Enter Value');
   });
+
+  testWidgets('Passes textDirection to underlying CupertinoTextField', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      CupertinoApp(
+        home: Center(
+          child: CupertinoTextFormFieldRow(
+            textDirection: TextDirection.ltr,
+          ),
+        ),
+      ),
+    );
+
+    final Finder ltrTextFieldFinder = find.byType(CupertinoTextField);
+    expect(ltrTextFieldFinder, findsOneWidget);
+
+    final CupertinoTextField ltrTextFieldWidget = tester.widget(ltrTextFieldFinder);
+    expect(ltrTextFieldWidget.textDirection, TextDirection.ltr);
+
+    await tester.pumpWidget(
+      CupertinoApp(
+        home: Center(
+          child: CupertinoTextFormFieldRow(
+            textDirection: TextDirection.rtl,
+          ),
+        ),
+      ),
+    );
+
+    final Finder rtlTextFieldFinder = find.byType(CupertinoTextField);
+    expect(rtlTextFieldFinder, findsOneWidget);
+
+    final CupertinoTextField rtlTextFieldWidget = tester.widget(rtlTextFieldFinder);
+    expect(rtlTextFieldWidget.textDirection, TextDirection.rtl);
+  });
 }