Allow requesting a reduced widget tree with getRootWidgetTree service extension (#157309)

packages/flutter/lib/src/foundation/diagnostics.dart

@@ -1605,12 +1605,29 @@ abstract class DiagnosticsNode {
   ///    by this method and interactive tree views in the Flutter IntelliJ
   ///    plugin.
   @mustCallSuper
-  Map<String, Object?> toJsonMap(DiagnosticsSerializationDelegate delegate) {
+  Map<String, Object?> toJsonMap(
+    DiagnosticsSerializationDelegate delegate, {
+    bool fullDetails = true,
+  }) {
     Map<String, Object?> result = <String, Object?>{};
     assert(() {
       final bool hasChildren = getChildren().isNotEmpty;
-      result = <String, Object?>{
+      final Map<String, Object?> essentialDetails = <String, Object?>{
         'description': toDescription(),
+        'shouldIndent': style != DiagnosticsTreeStyle.flat &&
+            style != DiagnosticsTreeStyle.error,
+        ...delegate.additionalNodeProperties(this, fullDetails: fullDetails),
+        if (delegate.subtreeDepth > 0)
+          'children': toJsonList(
+            delegate.filterChildren(getChildren(), this),
+            this,
+            delegate,
+            fullDetails: fullDetails,
+          ),
+      };
+
+      result = !fullDetails ? essentialDetails : <String, Object?>{
+        ...essentialDetails,
         'type': runtimeType.toString(),
         if (name != null)
           'name': name,
@@ -1634,18 +1651,12 @@ abstract class DiagnosticsNode {
           'allowWrap': allowWrap,
         if (allowNameWrap)
           'allowNameWrap': allowNameWrap,
-        ...delegate.additionalNodeProperties(this),
         if (delegate.includeProperties)
           'properties': toJsonList(
             delegate.filterProperties(getProperties(), this),
             this,
             delegate,
-          ),
+            fullDetails: fullDetails,
-        if (delegate.subtreeDepth > 0)
-          'children': toJsonList(
-            delegate.filterChildren(getChildren(), this),
-            this,
-            delegate,
           ),
       };
       return true;
@@ -1661,8 +1672,9 @@ abstract class DiagnosticsNode {
   static List<Map<String, Object?>> toJsonList(
     List<DiagnosticsNode>? nodes,
     DiagnosticsNode? parent,
-    DiagnosticsSerializationDelegate delegate,
+    DiagnosticsSerializationDelegate delegate, {
-  ) {
+    bool fullDetails = true,
+  }) {
     bool truncated = false;
     if (nodes == null) {
       return const <Map<String, Object?>>[];
@@ -1674,7 +1686,10 @@ abstract class DiagnosticsNode {
       truncated = true;
     }
     final List<Map<String, Object?>> json = nodes.map<Map<String, Object?>>((DiagnosticsNode node) {
-      return node.toJsonMap(delegate.delegateForNode(node));
+      return node.toJsonMap(
+        delegate.delegateForNode(node),
+        fullDetails: fullDetails,
+      );
     }).toList();
     if (truncated) {
       json.last['truncated'] = true;
@@ -1857,8 +1872,17 @@ class StringProperty extends DiagnosticsProperty<String> {
   final bool quoted;
 
   @override
-  Map<String, Object?> toJsonMap(DiagnosticsSerializationDelegate delegate) {
+  Map<String, Object?> toJsonMap(
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+    DiagnosticsSerializationDelegate delegate, {
+    bool fullDetails = true,
+  }) {
+    final Map<String, Object?> json = super.toJsonMap(
+      delegate,
+      fullDetails: fullDetails,
+    );
+    if (!fullDetails) {
+      return json;
+    }
     json['quoted'] = quoted;
     return json;
   }
@@ -1913,8 +1937,18 @@ abstract class _NumProperty<T extends num> extends DiagnosticsProperty<T> {
   }) : super.lazy();
 
   @override
-  Map<String, Object?> toJsonMap(DiagnosticsSerializationDelegate delegate) {
+  Map<String, Object?> toJsonMap(
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+    DiagnosticsSerializationDelegate delegate, {
+    bool fullDetails = true,
+  }) {
+    final Map<String, Object?> json = super.toJsonMap(
+      delegate,
+      fullDetails: fullDetails,
+    );
+    if (!fullDetails) {
+      return json;
+    }
+
     if (unit != null) {
       json['unit'] = unit;
     }
@@ -2097,8 +2131,17 @@ class FlagProperty extends DiagnosticsProperty<bool> {
        );
 
   @override
-  Map<String, Object?> toJsonMap(DiagnosticsSerializationDelegate delegate) {
+  Map<String, Object?> toJsonMap(
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+    DiagnosticsSerializationDelegate delegate, {
+    bool fullDetails = true,
+  }) {
+    final Map<String, Object?> json = super.toJsonMap(
+      delegate,
+      fullDetails: fullDetails,
+    );
+    if (!fullDetails) {
+      return json;
+    }
     if (ifTrue != null) {
       json['ifTrue'] = ifTrue;
     }
@@ -2219,8 +2262,17 @@ class IterableProperty<T> extends DiagnosticsProperty<Iterable<T>> {
   }
 
   @override
-  Map<String, Object?> toJsonMap(DiagnosticsSerializationDelegate delegate) {
+  Map<String, Object?> toJsonMap(
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+    DiagnosticsSerializationDelegate delegate, {
+    bool fullDetails = true,
+  }) {
+    final Map<String, Object?> json = super.toJsonMap(
+      delegate,
+      fullDetails: fullDetails,
+    );
+    if (!fullDetails) {
+      return json;
+    }
     if (value != null) {
       json['values'] = value!.map<String>((T value) => value.toString()).toList();
     }
@@ -2357,8 +2409,17 @@ class ObjectFlagProperty<T> extends DiagnosticsProperty<T> {
   }
 
   @override
-  Map<String, Object?> toJsonMap(DiagnosticsSerializationDelegate delegate) {
+  Map<String, Object?> toJsonMap(
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+    DiagnosticsSerializationDelegate delegate, {
+    bool fullDetails = true,
+  }) {
+    final Map<String, Object?> json = super.toJsonMap(
+      delegate,
+      fullDetails: fullDetails,
+    );
+    if (!fullDetails) {
+      return json;
+    }
     if (ifPresent != null) {
       json['ifPresent'] = ifPresent;
     }
@@ -2435,8 +2496,17 @@ class FlagsSummary<T> extends DiagnosticsProperty<Map<String, T?>> {
   }
 
   @override
-  Map<String, Object?> toJsonMap(DiagnosticsSerializationDelegate delegate) {
+  Map<String, Object?> toJsonMap(
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+    DiagnosticsSerializationDelegate delegate, {
+    bool fullDetails = true,
+  }) {
+    final Map<String, Object?> json = super.toJsonMap(
+      delegate,
+      fullDetails: fullDetails,
+    );
+    if (!fullDetails) {
+      return json;
+    }
     if (value.isNotEmpty) {
       json['values'] = _formattedValues().toList();
     }
@@ -2555,7 +2625,10 @@ class DiagnosticsProperty<T> extends DiagnosticsNode {
   final bool allowNameWrap;
 
   @override
-  Map<String, Object?> toJsonMap(DiagnosticsSerializationDelegate delegate) {
+  Map<String, Object?> toJsonMap(
+    DiagnosticsSerializationDelegate delegate, {
+    bool fullDetails = true,
+  }) {
     final T? v = value;
     List<Map<String, Object?>>? properties;
     if (delegate.expandPropertyValues && delegate.includeProperties && v is Diagnosticable && getProperties().isEmpty) {
@@ -2565,9 +2638,16 @@ class DiagnosticsProperty<T> extends DiagnosticsNode {
         delegate.filterProperties(v.toDiagnosticsNode().getProperties(), this),
         this,
         delegate,
+        fullDetails: fullDetails,
       );
     }
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+    final Map<String, Object?> json = super.toJsonMap(
+      delegate,
+      fullDetails: fullDetails,
+    );
+    if (!fullDetails) {
+      return json;
+    }
     if (properties != null) {
       json['properties'] = properties;
     }
@@ -3503,7 +3583,10 @@ abstract class DiagnosticsSerializationDelegate {
   ///
   /// This method is called for every [DiagnosticsNode] that's included in
   /// the serialization.
-  Map<String, Object?> additionalNodeProperties(DiagnosticsNode node);
+  Map<String, Object?> additionalNodeProperties(
+    DiagnosticsNode node, {
+    bool fullDetails = true,
+  });
 
   /// Filters the list of [DiagnosticsNode]s that will be included as children
   /// for the given `owner` node.
@@ -3595,7 +3678,10 @@ class _DefaultDiagnosticsSerializationDelegate implements DiagnosticsSerializati
   });
 
   @override
-  Map<String, Object?> additionalNodeProperties(DiagnosticsNode node) {
+  Map<String, Object?> additionalNodeProperties(
+    DiagnosticsNode node, {
+    bool fullDetails = true,
+  }) {
     return const <String, Object?>{};
   }
 

packages/flutter/lib/src/painting/colors.dart

@@ -495,8 +495,17 @@ class ColorProperty extends DiagnosticsProperty<Color> {
   });
 
   @override
-  Map<String, Object?> toJsonMap(DiagnosticsSerializationDelegate delegate) {
+  Map<String, Object?> toJsonMap(
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+    DiagnosticsSerializationDelegate delegate, {
+    bool fullDetails = true,
+  }) {
+    final Map<String, Object?> json = super.toJsonMap(
+      delegate,
+      fullDetails: fullDetails,
+    );
+    if (!fullDetails) {
+      return json;
+    }
     if (value != null) {
       json['valueProperties'] = <String, Object>{
         'red': value!.red,

packages/flutter/lib/src/widgets/framework.dart

@@ -5379,13 +5379,18 @@ class _ElementDiagnosticableTreeNode extends DiagnosticableTreeNode {
   final bool stateful;
 
   @override
-  Map<String, Object?> toJsonMap(DiagnosticsSerializationDelegate delegate) {
+  Map<String, Object?> toJsonMap(
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+    DiagnosticsSerializationDelegate delegate, {
+    bool fullDetails = true,
+  }) {
+    final Map<String, Object?> json = super.toJsonMap(delegate, fullDetails: fullDetails,);
     final Element element = value as Element;
     if (!element.debugIsDefunct) {
       json['widgetRuntimeType'] = element.widget.runtimeType.toString();
     }
-    json['stateful'] = stateful;
+    if (fullDetails) {
+      json['stateful'] = stateful;
+    }
     return json;
   }
 }

packages/flutter/lib/src/widgets/icon_data.dart

@@ -121,8 +121,17 @@ class IconDataProperty extends DiagnosticsProperty<IconData> {
   });
 
   @override
-  Map<String, Object?> toJsonMap(DiagnosticsSerializationDelegate delegate) {
+  Map<String, Object?> toJsonMap(
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+    DiagnosticsSerializationDelegate delegate, {
+    bool fullDetails = true,
+  }) {
+    final Map<String, Object?> json = super.toJsonMap(
+      delegate,
+      fullDetails: fullDetails,
+    );
+    if (!fullDetails) {
+      return json;
+    }
     if (value != null) {
       json['valueProperties'] = <String, Object>{
         'codePoint': value!.codePoint,

packages/flutter/lib/src/widgets/widget_inspector.dart

@@ -1729,9 +1729,11 @@ mixin WidgetInspectorService {
 
   Map<String, Object?>? _nodeToJson(
     DiagnosticsNode? node,
-    InspectorSerializationDelegate delegate,
+    InspectorSerializationDelegate delegate, {
+    bool fullDetails = true,
+  }
   ) {
-    return node?.toJsonMap(delegate);
+    return node?.toJsonMap(delegate, fullDetails: fullDetails);
   }
 
   bool _isValueCreatedByLocalProject(Object? value) {
@@ -1801,8 +1803,14 @@ mixin WidgetInspectorService {
     List<DiagnosticsNode> nodes,
     InspectorSerializationDelegate delegate, {
     required DiagnosticsNode? parent,
+    bool fullDetails = true,
   }) {
-    return DiagnosticsNode.toJsonList(nodes, parent, delegate);
+    return DiagnosticsNode.toJsonList(
+      nodes,
+      parent,
+      delegate,
+      fullDetails: fullDetails,
+    );
   }
 
   /// Returns a JSON representation of the properties of the [DiagnosticsNode]
@@ -1976,11 +1984,14 @@ mixin WidgetInspectorService {
     final String groupName = parameters['groupName']!;
     final bool isSummaryTree = parameters['isSummaryTree'] == 'true';
     final bool withPreviews = parameters['withPreviews'] == 'true';
+    // If the "fullDetails" parameter is not provided, default to true.
+    final bool fullDetails = parameters['fullDetails'] != 'false';
 
     final Map<String, Object?>? result = _getRootWidgetTreeImpl(
       groupName: groupName,
       isSummaryTree: isSummaryTree,
       withPreviews: withPreviews,
+      fullDetails: fullDetails,
     );
 
     return Future<Map<String, dynamic>>.value(<String, dynamic>{
@@ -1992,6 +2003,7 @@ mixin WidgetInspectorService {
     required String groupName,
     required bool isSummaryTree,
     required bool withPreviews,
+    bool fullDetails = true,
     Map<String, Object>? Function(
             DiagnosticsNode, InspectorSerializationDelegate)?
         addAdditionalPropertiesCallback,
@@ -2032,6 +2044,7 @@ mixin WidgetInspectorService {
             ? combinedAddAdditionalPropertiesCallback
             : null,
       ),
+      fullDetails: fullDetails,
     );
   }
 
@@ -3788,19 +3801,24 @@ class InspectorSerializationDelegate implements DiagnosticsSerializationDelegate
   bool get _interactive => groupName != null;
 
   @override
-  Map<String, Object?> additionalNodeProperties(DiagnosticsNode node) {
+  Map<String, Object?> additionalNodeProperties(
+    DiagnosticsNode node, {
+    bool fullDetails = true,
+  }) {
     final Map<String, Object?> result = <String, Object?>{};
     final Object? value = node.value;
+    if (summaryTree && fullDetails) {
+      result['summaryTree'] = true;
+    }
     if (_interactive) {
       result['valueId'] = service.toId(value, groupName!);
     }
-    if (summaryTree) {
-      result['summaryTree'] = true;
-    }
     final _Location? creationLocation = _getCreationLocation(value);
     if (creationLocation != null) {
-      result['locationId'] = _toLocationId(creationLocation);
+      if (fullDetails) {
-      result['creationLocation'] = creationLocation.toJsonMap();
+        result['locationId'] = _toLocationId(creationLocation);
+        result['creationLocation'] = creationLocation.toJsonMap();
+      }
       if (service._isLocalCreationLocation(creationLocation.file)) {
         _nodesCreatedByLocalProject.add(node);
         result['createdByLocalProject'] = true;

packages/flutter/test/foundation/diagnostics_json_test.dart

@@ -24,6 +24,16 @@ void main() {
   });
 
   group('Serialization', () {
+    const List<String> essentialDiagnosticKeys = <String>[
+      'description',
+      'shouldIndent',
+    ];
+    const List<String> detailedDiagnosticKeys = <String>[
+      'type',
+      'hasChildren',
+      'allowWrap',
+    ];
+
     final TestTree testTree = TestTree(
       properties: <DiagnosticsNode>[
         StringProperty('stringProperty1', 'value1', quoted: false),
@@ -70,6 +80,46 @@ void main() {
       final Map<String, Object?> result = testTree.toDiagnosticsNode().toJsonMap(const DiagnosticsSerializationDelegate());
       expect(result.containsKey('properties'), isFalse);
       expect(result.containsKey('children'), isFalse);
+
+      for (final String keyName in essentialDiagnosticKeys) {
+        expect(
+          result.containsKey(keyName),
+          isTrue,
+          reason: '$keyName is included.',
+        );
+      }
+      for (final String keyName in detailedDiagnosticKeys) {
+        expect(
+          result.containsKey(keyName),
+          isTrue,
+          reason: '$keyName is included.',
+        );
+      }
+    });
+
+    test('without full details', () {
+      final Map<String, Object?> result = testTree
+        .toDiagnosticsNode()
+        .toJsonMap(
+          const DiagnosticsSerializationDelegate(), fullDetails: false
+        );
+      expect(result.containsKey('properties'), isFalse);
+      expect(result.containsKey('children'), isFalse);
+
+      for (final String keyName in essentialDiagnosticKeys) {
+        expect(
+          result.containsKey(keyName),
+          isTrue,
+          reason: '$keyName is included.',
+        );
+      }
+      for (final String keyName in detailedDiagnosticKeys) {
+        expect(
+          result.containsKey(keyName),
+          isFalse,
+          reason: '$keyName is  not included.',
+        );
+      }
     });
 
     test('subtreeDepth 1', () {
@@ -279,7 +329,10 @@ class TestDiagnosticsSerializationDelegate implements DiagnosticsSerializationDe
   final NodeDelegator? nodeDelegator;
 
   @override
-  Map<String, Object> additionalNodeProperties(DiagnosticsNode node) {
+  Map<String, Object> additionalNodeProperties(
+    DiagnosticsNode node, {
+    bool fullDetails = true,
+  }) {
     return additionalNodePropertiesMap;
   }
 

packages/flutter/test/widgets/widget_inspector_test.dart

@@ -1982,6 +1982,14 @@ class _TestWidgetInspectorService extends TestWidgetInspectorService {
             return childJson['createdByLocalProject'] == true;
           }
 
+          /// Returns whether the child is missing the "type" field.
+          ///
+          /// This should always be true for nodes in the widget tree without
+          /// full details.
+          bool isMissingType(Map<String, Object?> childJson) {
+            return childJson['type'] == null;
+          }
+
           /// Returns whether the child has a description matching [description].
           bool hasDescription(
             Map<String, Object?> childJson, {
@@ -2278,6 +2286,79 @@ class _TestWidgetInspectorService extends TestWidgetInspectorService {
               },
             ))! as Map<String, Object?>;
 
+            expect(
+              allChildrenSatisfyCondition(rootJson,
+                condition: isMissingType,
+              ),
+              isFalse,
+            );
+            expect(
+              allChildrenSatisfyCondition(rootJson,
+                condition: wasCreatedByLocalProject,
+              ),
+              isFalse,
+            );
+            expect(
+              oneChildSatisfiesCondition(rootJson, condition: (Map<String, Object?> child) {
+                return hasDescription(child, description: 'Text') &&
+                    wasCreatedByLocalProject(child) &&
+                    !hasTextPreview(child, preview: 'a');
+                },
+              ),
+              isTrue,
+            );
+            expect(
+              oneChildSatisfiesCondition(rootJson, condition: (Map<String, Object?> child) {
+                return hasDescription(child, description: 'Text') &&
+                    wasCreatedByLocalProject(child) &&
+                    !hasTextPreview(child, preview: 'b');
+                },
+              ),
+              isTrue,
+            );
+            expect(
+              oneChildSatisfiesCondition(rootJson, condition: (Map<String, Object?> child) {
+                return hasDescription(child, description: 'Text') &&
+                    wasCreatedByLocalProject(child) &&
+                    !hasTextPreview(child, preview: 'c');
+                },
+              ),
+              isTrue,
+            );
+          });
+
+          testWidgets(
+              'tree without full details using ext.flutter.inspector.getRootWidgetTree',
+              (WidgetTester tester) async {
+            const String group = 'test-group';
+
+            await pumpWidgetTreeWithABC(tester);
+            final Element elementA = findElementABC('a');
+            final Map<String, dynamic> jsonA =
+                await selectedWidgetResponseForElement(elementA);
+
+            final Map<String, Object?> creationLocation =
+                verifyAndReturnCreationLocation(jsonA);
+            final String testFile = verifyAndReturnTestFile(creationLocation);
+            addPubRootDirectoryFor(testFile);
+
+            final Map<String, Object?> rootJson = (await service.testExtension(
+              WidgetInspectorServiceExtensions.getRootWidgetTree.name,
+              <String, String>{
+                'groupName': group,
+                'isSummaryTree': 'false',
+                'withPreviews': 'false',
+                'fullDetails': 'false',
+              },
+            ))! as Map<String, Object?>;
+
+            expect(
+              allChildrenSatisfyCondition(rootJson,
+                condition: isMissingType,
+              ),
+              isTrue,
+            );
+
             expect(
               allChildrenSatisfyCondition(rootJson,
                 condition: wasCreatedByLocalProject,
@@ -2337,6 +2418,79 @@ class _TestWidgetInspectorService extends TestWidgetInspectorService {
               },
             ))! as Map<String, Object?>;
 
+            expect(
+              allChildrenSatisfyCondition(rootJson,
+                condition: isMissingType,
+              ),
+              isFalse,
+            );
+            expect(
+              allChildrenSatisfyCondition(rootJson,
+                condition: wasCreatedByLocalProject,
+              ),
+              isFalse,
+            );
+            expect(
+              oneChildSatisfiesCondition(rootJson, condition: (Map<String, Object?> child) {
+                return hasDescription(child, description: 'Text') &&
+                    wasCreatedByLocalProject(child) &&
+                    hasTextPreview(child, preview: 'a');
+                },
+              ),
+              isTrue,
+            );
+            expect(
+              oneChildSatisfiesCondition(rootJson, condition: (Map<String, Object?> child) {
+                return hasDescription(child, description: 'Text') &&
+                    wasCreatedByLocalProject(child) &&
+                    hasTextPreview(child, preview: 'b');
+                },
+              ),
+              isTrue,
+            );
+            expect(
+              oneChildSatisfiesCondition(rootJson, condition: (Map<String, Object?> child) {
+                return hasDescription(child, description: 'Text') &&
+                    wasCreatedByLocalProject(child) &&
+                    hasTextPreview(child, preview: 'c');
+                },
+              ),
+              isTrue,
+            );
+          });
+
+          testWidgets(
+              'tree without full details and with previews using ext.flutter.inspector.getRootWidgetTree',
+              (WidgetTester tester) async {
+            const String group = 'test-group';
+
+            await pumpWidgetTreeWithABC(tester);
+            final Element elementA = findElementABC('a');
+            final Map<String, dynamic> jsonA =
+                await selectedWidgetResponseForElement(elementA);
+
+            final Map<String, Object?> creationLocation =
+                verifyAndReturnCreationLocation(jsonA);
+            final String testFile = verifyAndReturnTestFile(creationLocation);
+            addPubRootDirectoryFor(testFile);
+
+            final Map<String, Object?> rootJson = (await service.testExtension(
+              WidgetInspectorServiceExtensions.getRootWidgetTree.name,
+              <String, String>{
+                'groupName': group,
+                'isSummaryTree': 'false',
+                'withPreviews': 'true',
+                'fullDetails': 'false',
+              },
+            ))! as Map<String, Object?>;
+
+
+            expect(
+              allChildrenSatisfyCondition(rootJson,
+                condition: isMissingType,
+              ),
+              isTrue,
+            );
             expect(
               allChildrenSatisfyCondition(rootJson,
                 condition: wasCreatedByLocalProject,
@@ -5390,6 +5544,7 @@ class _TestWidgetInspectorService extends TestWidgetInspectorService {
         node.toJsonMap(const DiagnosticsSerializationDelegate()),
         equals(<String, dynamic>{
           'description': 'description of the deep link',
+          'shouldIndent': true,
           'type': 'DevToolsDeepLinkProperty',
           'name': '',
           'style': 'singleLine',