Allow requesting a reduced widget tree with getRootWidgetTree service extension

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,
-          ),
-        if (delegate.subtreeDepth > 0)
-          'children': toJsonList(
-            delegate.filterChildren(getChildren(), this),
-            this,
-            delegate,
+            fullDetails: fullDetails,
           ),
       };
       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) {
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+  Map<String, Object?> toJsonMap(
+    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) {
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+  Map<String, Object?> toJsonMap(
+    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) {
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+  Map<String, Object?> toJsonMap(
+    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) {
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+  Map<String, Object?> toJsonMap(
+    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) {
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+  Map<String, Object?> toJsonMap(
+    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) {
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+  Map<String, Object?> toJsonMap(
+    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) {
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+  Map<String, Object?> toJsonMap(
+    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) {
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+  Map<String, Object?> toJsonMap(
+    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) {
-    final Map<String, Object?> json = super.toJsonMap(delegate);
+  Map<String, Object?> toJsonMap(
+    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,