Fix InkRipple doesn't respect rectCallback when rendering ink circle (#117395)

Author: TahaTesser

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

@@ -232,10 +232,14 @@ class InkRipple extends InteractiveInkFeature {
   void paintFeature(Canvas canvas, Matrix4 transform) {
     final int alpha = _fadeInController.isAnimating ? _fadeIn.value : _fadeOut.value;
     final Paint paint = Paint()..color = color.withAlpha(alpha);
+    Rect? rect;
+    if (_clipCallback != null) {
+       rect = _clipCallback!();
+    }
     // Splash moves to the center of the reference box.
     final Offset center = Offset.lerp(
       _position,
-      referenceBox.size.center(Offset.zero),
+      rect != null ? rect.center : referenceBox.size.center(Offset.zero),
       Curves.ease.transform(_radiusController.value),
     )!;
     paintInkCircle(

packages/flutter/test/material/ink_paint_test.dart

@@ -445,4 +445,90 @@ void main() {
       throw 'Expected: paint.color.alpha == 0, found: ${paint.color.alpha}';
     }));
   });
+
+  testWidgets('Custom rectCallback renders an ink splash from its center', (WidgetTester tester) async {
+    const Color splashColor = Color(0xff00ff00);
+
+    Widget buildWidget({InteractiveInkFeatureFactory? splashFactory}) {
+      return Directionality(
+        textDirection: TextDirection.ltr,
+        child: Material(
+          child: Center(
+            child: SizedBox(
+              width: 100.0,
+              height: 200.0,
+              child: InkResponse(
+                splashColor: splashColor,
+                containedInkWell: true,
+                highlightShape: BoxShape.rectangle,
+                splashFactory: splashFactory,
+                onTap: () { },
+              ),
+            ),
+          ),
+        ),
+      );
+    }
+
+    await tester.pumpWidget(buildWidget());
+
+    final Offset center = tester.getCenter(find.byType(SizedBox));
+    TestGesture gesture = await tester.startGesture(center);
+    await tester.pump(); // start gesture
+    await tester.pumpAndSettle(); // Finish rendering ink splash.
+
+    RenderBox box = Material.of(tester.element(find.byType(InkResponse))) as RenderBox;
+    expect(
+      box,
+      paints
+        ..circle(x: 50.0, y: 100.0, color: splashColor)
+    );
+
+    await gesture.up();
+
+    await tester.pumpWidget(buildWidget(splashFactory: _InkRippleFactory()));
+    await tester.pumpAndSettle(); // Finish rendering ink splash.
+
+    gesture = await tester.startGesture(center);
+    await tester.pump(); // start gesture
+    await tester.pumpAndSettle(); // Finish rendering ink splash.
+
+    box = Material.of(tester.element(find.byType(InkResponse))) as RenderBox;
+    expect(
+      box,
+      paints
+        ..circle(x: 50.0, y: 50.0, color: splashColor)
+    );
+  });
+}
+
+class _InkRippleFactory extends InteractiveInkFeatureFactory {
+  @override
+  InteractiveInkFeature create({
+    required MaterialInkController controller,
+    required RenderBox referenceBox,
+    required Offset position,
+    required Color color,
+    required TextDirection textDirection,
+    bool containedInkWell = false,
+    RectCallback? rectCallback,
+    BorderRadius? borderRadius,
+    ShapeBorder? customBorder,
+    double? radius,
+    VoidCallback? onRemoved,
+  }) {
+    return InkRipple(
+      controller: controller,
+      referenceBox: referenceBox,
+      position: position,
+      color: color,
+      containedInkWell: containedInkWell,
+      rectCallback: () => Offset.zero & const Size(100, 100),
+      borderRadius: borderRadius,
+      customBorder: customBorder,
+      radius: radius,
+      onRemoved: onRemoved,
+      textDirection: textDirection,
+    );
+  }
 }