feat: improve obscure rectangle fit/size (#2236)

Author: vaind

CHANGELOG.md

@@ -4,7 +4,7 @@
 
 ### Features
 
-- Session replay Alpha for Android and iOS ([#2208](https://github.com/getsentry/sentry-dart/pull/2208), [#2269](https://github.com/getsentry/sentry-dart/pull/2269)).
+- Session replay Alpha for Android and iOS ([#2208](https://github.com/getsentry/sentry-dart/pull/2208), [#2269](https://github.com/getsentry/sentry-dart/pull/2269), [#2236](https://github.com/getsentry/sentry-dart/pull/2236)).
 
   To try out replay, you can set following options (access is limited to early access orgs on Sentry. If you're interested, [sign up for the waitlist](https://sentry.io/lp/mobile-replay-beta/)):
 
@@ -27,6 +27,7 @@
       ...
       options.allowUrls = ["^https://sentry.com.*\$", "my-custom-domain"];
       options.denyUrls = ["^.*ends-with-this\$", "denied-url"];
+      options.denyUrls = ["^.*ends-with-this\$", "denied-url"];
     },
     appRunner: () => runApp(MyApp()),
   );

flutter/lib/src/replay/widget_filter.dart

@@ -1,3 +1,4 @@
+import 'package:flutter/rendering.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
 import 'package:meta/meta.dart';
@@ -77,25 +78,25 @@ class WidgetFilter {
 
     final renderObject = element.renderObject;
     if (renderObject is! RenderBox) {
-      _cantObscure(widget, "it's renderObject is not a RenderBox");
+      _cantObscure(widget, "its renderObject is not a RenderBox");
       return false;
     }
 
-    final size = element.size;
-    if (size == null) {
-      _cantObscure(widget, "it's renderObject has a null size");
-      return false;
+    var rect = _boundingBox(renderObject);
+
+    // If it's a clipped render object, use parent's offset and size.
+    // This helps with text fields which often have oversized render objects.
+    if (renderObject.parent is RenderStack) {
+      final renderStack = (renderObject.parent as RenderStack);
+      final clipBehavior = renderStack.clipBehavior;
+      if (clipBehavior == Clip.hardEdge ||
+          clipBehavior == Clip.antiAlias ||
+          clipBehavior == Clip.antiAliasWithSaveLayer) {
+        final clipRect = _boundingBox(renderStack);
+        rect = rect.intersect(clipRect);
+      }
     }
 
-    final offset = renderObject.localToGlobal(Offset.zero);
-
-    final rect = Rect.fromLTWH(
-      offset.dx * _pixelRatio,
-      offset.dy * _pixelRatio,
-      size.width * _pixelRatio,
-      size.height * _pixelRatio,
-    );
-
     if (!rect.overlaps(_bounds)) {
       assert(() {
         logger(SentryLevel.debug, "WidgetFilter skipping offscreen: $widget");
@@ -151,6 +152,17 @@ class WidgetFilter {
           "WidgetFilter cannot obscure widget $widget: $message");
     }
   }
+
+  @pragma('vm:prefer-inline')
+  Rect _boundingBox(RenderBox box) {
+    final offset = box.localToGlobal(Offset.zero);
+    return Rect.fromLTWH(
+      offset.dx * _pixelRatio,
+      offset.dy * _pixelRatio,
+      box.size.width * _pixelRatio,
+      box.size.height * _pixelRatio,
+    );
+  }
 }
 
 class WidgetFilterItem {

flutter/test/replay/test_widget.dart

@@ -33,6 +33,22 @@ Future<Element> pumpTestElement(WidgetTester tester,
                       Opacity(opacity: 0, child: newImage()),
                       Offstage(offstage: true, child: Text('Offstage text')),
                       Offstage(offstage: true, child: newImage()),
+                      Text(dummyText),
+                      SizedBox(
+                          width: 100,
+                          height: 20,
+                          child: Stack(children: [
+                            Positioned(
+                                top: 0,
+                                left: 0,
+                                width: 50,
+                                child: Text(dummyText)),
+                            Positioned(
+                                top: 0,
+                                left: 0,
+                                width: 50,
+                                child: newImage(width: 500, height: 500)),
+                          ]))
                     ],
               ),
             ),
@@ -55,4 +71,10 @@ final testImageData = Uint8List.fromList([
   // This comment prevents dartfmt reformatting this to single-item lines.
 ]);
 
-Image newImage() => Image.memory(testImageData, width: 1, height: 1);
+Image newImage({double width = 1, double height = 1}) => Image.memory(
+      testImageData,
+      width: width,
+      height: height,
+    );
+
+const dummyText = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.';

flutter/test/replay/widget_filter_test.dart

@@ -21,12 +21,15 @@ void main() async {
             rootAssetBundle: rootBundle,
           );
 
+  boundsRect(WidgetFilterItem item) =>
+      '${item.bounds.width.floor()}x${item.bounds.height.floor()}';
+
   group('redact text', () {
     testWidgets('redacts the correct number of elements', (tester) async {
       final sut = createSut(redactText: true);
       final element = await pumpTestElement(tester);
       sut.obscure(element, 1.0, defaultBounds);
-      expect(sut.items.length, 2);
+      expect(sut.items.length, 4);
     });
 
     testWidgets('does not redact text when disabled', (tester) async {
@@ -43,14 +46,25 @@ void main() async {
       sut.obscure(element, 1.0, Rect.fromLTRB(0, 0, 100, 100));
       expect(sut.items.length, 1);
     });
+
+    testWidgets('correctly determines sizes', (tester) async {
+      final sut = createSut(redactText: true);
+      final element = await pumpTestElement(tester);
+      sut.obscure(element, 1.0, defaultBounds);
+      expect(sut.items.length, 4);
+      expect(boundsRect(sut.items[0]), '624x48');
+      expect(boundsRect(sut.items[1]), '169x20');
+      expect(boundsRect(sut.items[2]), '800x192');
+      expect(boundsRect(sut.items[3]), '50x20');
+    });
   });
 
   group('redact images', () {
     testWidgets('redacts the correct number of elements', (tester) async {
       final sut = createSut(redactImages: true);
       final element = await pumpTestElement(tester);
       sut.obscure(element, 1.0, defaultBounds);
-      expect(sut.items.length, 2);
+      expect(sut.items.length, 3);
     });
 
     // Note: we cannot currently test actual asset images without either:
@@ -93,6 +107,16 @@ void main() async {
       sut.obscure(element, 1.0, Rect.fromLTRB(0, 0, 500, 100));
       expect(sut.items.length, 1);
     });
+
+    testWidgets('correctly determines sizes', (tester) async {
+      final sut = createSut(redactImages: true);
+      final element = await pumpTestElement(tester);
+      sut.obscure(element, 1.0, defaultBounds);
+      expect(sut.items.length, 3);
+      expect(boundsRect(sut.items[0]), '1x1');
+      expect(boundsRect(sut.items[1]), '1x1');
+      expect(boundsRect(sut.items[2]), '50x20');
+    });
   });
 }