Pass through magnifierConfiguration (#118270)

Author: justinmc

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

@@ -154,6 +154,7 @@ class TextFormField extends FormField<String> {
     bool enableIMEPersonalizedLearning = true,
     MouseCursor? mouseCursor,
     EditableTextContextMenuBuilder? contextMenuBuilder = _defaultContextMenuBuilder,
+    TextMagnifierConfiguration? magnifierConfiguration,
   }) : assert(initialValue == null || controller == null),
        assert(obscuringCharacter.length == 1),
        assert(maxLines == null || maxLines > 0),
@@ -234,6 +235,7 @@ class TextFormField extends FormField<String> {
                enableIMEPersonalizedLearning: enableIMEPersonalizedLearning,
                mouseCursor: mouseCursor,
                contextMenuBuilder: contextMenuBuilder,
+               magnifierConfiguration: magnifierConfiguration,
              ),
            );
          },

packages/flutter/test/material/text_form_field_test.dart

@@ -1148,4 +1148,25 @@ void main() {
     variant: TargetPlatformVariant.all(),
     skip: kIsWeb, // [intended] we don't supply the cut/copy/paste buttons on the web.
   );
+
+  testWidgets('magnifierConfiguration passes through to EditableText', (WidgetTester tester) async {
+    final TextMagnifierConfiguration myTextMagnifierConfiguration = TextMagnifierConfiguration(
+      magnifierBuilder: (BuildContext context, MagnifierController controller, ValueNotifier<MagnifierInfo> notifier) {
+        return const Placeholder();
+      },
+    );
+
+    await tester.pumpWidget(MaterialApp(
+      home: Scaffold(
+        body: TextField(
+          magnifierConfiguration: myTextMagnifierConfiguration,
+        ),
+      ),
+    ));
+
+    expect(find.byType(EditableText), findsOneWidget);
+
+    final EditableText editableText = tester.widget(find.byType(EditableText));
+    expect(editableText.magnifierConfiguration, equals(myTextMagnifierConfiguration));
+  });
 }