Add textScale(r) value to Flutter context

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+### Features
+
+- Add textScale(r) value to Flutter context ([#1886](https://github.com/getsentry/sentry-dart/pull/1886))
+
 ## 7.18.0
 
 ### Features

dart/lib/src/protocol/sentry_app.dart

@@ -19,6 +19,7 @@ class SentryApp {
     this.appMemory,
     this.inForeground,
     this.viewNames,
+    this.textScale,
   });
 
   /// Human readable application name, as it appears on the platform.
@@ -52,6 +53,9 @@ class SentryApp {
   /// The names of the currently visible views.
   final List<String>? viewNames;
 
+  /// The text scale of the [SentryWidget] using fontSize == 1
+  final double? textScale;
+
   /// Deserializes a [SentryApp] from JSON [Map].
   factory SentryApp.fromJson(Map<String, dynamic> data) {
     final viewNamesJson = data['view_names'] as List<dynamic>?;
@@ -68,6 +72,7 @@ class SentryApp {
       appMemory: data['app_memory'],
       inForeground: data['in_foreground'],
       viewNames: viewNamesJson?.map((e) => e as String).toList(),
+      textScale: data['text_scale'],
     );
   }
 
@@ -84,6 +89,7 @@ class SentryApp {
       if (appMemory != null) 'app_memory': appMemory!,
       if (inForeground != null) 'in_foreground': inForeground!,
       if (viewNames != null && viewNames!.isNotEmpty) 'view_names': viewNames!,
+      if (textScale != null) 'text_scale': textScale!,
     };
   }
 
@@ -98,6 +104,7 @@ class SentryApp {
         appMemory: appMemory,
         inForeground: inForeground,
         viewNames: viewNames,
+        textScale: textScale,
       );
 
   SentryApp copyWith({
@@ -111,6 +118,7 @@ class SentryApp {
     int? appMemory,
     bool? inForeground,
     List<String>? viewNames,
+    double? textScale,
   }) =>
       SentryApp(
         name: name ?? this.name,
@@ -123,5 +131,6 @@ class SentryApp {
         appMemory: appMemory ?? this.appMemory,
         inForeground: inForeground ?? this.inForeground,
         viewNames: viewNames ?? this.viewNames,
+        textScale: textScale ?? this.textScale,
       );
 }

dart/test/protocol/sentry_app_test.dart

@@ -15,6 +15,7 @@
     deviceAppHash: 'fixture-deviceAppHash',
     inForeground: true,
     viewNames: ['fixture-viewName', 'fixture-viewName2'],
+    textScale: 'fixture-textScale',
   );
 
   final sentryAppJson = <String, dynamic>{
@@ -27,6 +28,7 @@
     'device_app_hash': 'fixture-deviceAppHash',
     'in_foreground': true,
     'view_names': ['fixture-viewName', 'fixture-viewName2'],
+    'text_scale': 'fixture-textScale',
   };
 
   group('json', () {
@@ -42,6 +44,7 @@
       expect(json['device_app_hash'], 'fixture-deviceAppHash');
       expect(json['in_foreground'], true);
       expect(json['view_names'], ['fixture-viewName', 'fixture-viewName2']);
+      expect(json['text_scale'], 'fixture-textScale');
     });
     test('fromJson', () {
       final sentryApp = SentryApp.fromJson(sentryAppJson);
@@ -56,6 +59,7 @@
       expect(json['device_app_hash'], 'fixture-deviceAppHash');
       expect(json['in_foreground'], true);
       expect(json['view_names'], ['fixture-viewName', 'fixture-viewName2']);
+      expect(json['text_scale'], 'fixture-textScale');
     });
   });
 
@@ -86,6 +90,7 @@
         deviceAppHash: 'hash1',
         inForeground: true,
         viewNames: ['screen1'],
+        textScale: 'textScale1',
       );
 
       expect('name1', copy.name);
@@ -97,6 +102,7 @@
       expect('hash1', copy.deviceAppHash);
       expect(true, copy.inForeground);
       expect(['screen1'], copy.viewNames);
+      expect('textScale1', copy.textScale);
     });
   });
 }

flutter/example/lib/main.dart

@@ -86,6 +86,7 @@ Future<void> setupSentry(
 
       options.maxRequestBodySize = MaxRequestBodySize.always;
       options.maxResponseBodySize = MaxResponseBodySize.always;
+      options.navigatorKey = navigatorKey;
 
       _isIntegrationTest = isIntegrationTest;
       if (_isIntegrationTest) {

flutter/lib/src/event_processor/widget_event_processor.dart

@@ -0,0 +1,34 @@
+import 'dart:async';
+
+import 'package:flutter/widgets.dart';
+
+import '../../sentry_flutter.dart';
+
+class WidgetEventProcessor implements EventProcessor {
+  @override
+  FutureOr<SentryEvent?> apply(SentryEvent event, {Hint? hint}) {
+    if (event is SentryTransaction) {
+      return event;
+    }
+    if (event.exceptions == null && event.throwable == null) {
+      return event;
+    }
+    final context = sentryWidgetGlobalKey.currentContext;
+    if (context == null) {
+      return event;
+    }
+
+    // ignore: deprecated_member_use
+    final textScale = MediaQuery.maybeTextScaleFactorOf(context);
+    if (textScale == null) {
+      return event;
+    }
+    return event.copyWith(
+      contexts: event.contexts.copyWith(
+        app: event.contexts.app?.copyWith(
+          textScale: textScale,
+        ),
+      ),
+    );
+  }
+}

flutter/lib/src/sentry_flutter.dart

@@ -8,6 +8,7 @@ import '../sentry_flutter.dart';
 import 'event_processor/android_platform_exception_event_processor.dart';
 import 'event_processor/flutter_exception_event_processor.dart';
 import 'event_processor/platform_exception_event_processor.dart';
+import 'event_processor/widget_event_processor.dart';
 import 'frame_callback_handler.dart';
 import 'integrations/connectivity/connectivity_integration.dart';
 import 'integrations/screenshot_integration.dart';
@@ -110,12 +111,13 @@ mixin SentryFlutter {
       options.addScopeObserver(NativeScopeObserver(_native!));
     }
 
-    var flutterEventProcessor = FlutterEnricherEventProcessor(options);
-    options.addEventProcessor(flutterEventProcessor);
+    options.addEventProcessor(FlutterEnricherEventProcessor(options));
+    options.addEventProcessor(WidgetEventProcessor());
 
     if (options.platformChecker.platform.isAndroid) {
-      options
-          .addEventProcessor(AndroidPlatformExceptionEventProcessor(options));
+      options.addEventProcessor(
+        AndroidPlatformExceptionEventProcessor(options),
+      );
     }
 
     options.addEventProcessor(PlatformExceptionEventProcessor());

flutter/lib/src/sentry_widget.dart

@@ -1,6 +1,11 @@
 import 'package:flutter/cupertino.dart';
+import 'package:meta/meta.dart';
 import '../sentry_flutter.dart';
 
+/// Key which is used to identify the [SentryWidget]
+@internal
+final sentryWidgetGlobalKey = GlobalKey(debugLabel: 'sentry_widget');
+
 /// This widget serves as a wrapper to include Sentry widgets such
 /// as [SentryScreenshotWidget] and [SentryUserInteractionWidget].
 class SentryWidget extends StatefulWidget {
@@ -18,6 +23,9 @@ class _SentryWidgetState extends State<SentryWidget> {
     Widget content = widget.child;
     content = SentryScreenshotWidget(child: content);
     content = SentryUserInteractionWidget(child: content);
-    return content;
+    return Container(
+      key: sentryWidgetGlobalKey,
+      child: content,
+    );
   }
 }

flutter/test/event_processor/widget_event_processor_test.dart

@@ -0,0 +1,44 @@
+import 'package:flutter/widgets.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:sentry_flutter/sentry_flutter.dart';
+import 'package:sentry_flutter/src/event_processor/widget_event_processor.dart';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+  late Fixture fixture;
+
+  setUp(() {
+    fixture = Fixture();
+  });
+
+  testWidgets('adds screenshot attachment dart:io', (tester) async {
+    await tester.runAsync(() async {
+      final sut = fixture.getSut();
+      await tester.pumpWidget(
+        SentryWidget(
+          child: Text(
+            'Catching Pokémon is a snap!',
+            textDirection: TextDirection.ltr,
+          ),
+        ),
+      );
+
+      final throwable = Exception();
+      SentryEvent? event = SentryEvent(throwable: throwable);
+      event = event.copyWith(
+        contexts: event.contexts.copyWith(
+          app: SentryApp(),
+        ),
+      );
+      event = await sut.apply(event);
+
+      expect(event?.contexts.app?.textScale, 1.0);
+    });
+  });
+}
+
+class Fixture {
+  WidgetEventProcessor getSut() {
+    return WidgetEventProcessor();
+  }
+}