Reverts "Reland Native ios context menu (#143002) (#148238)" (#148254)

Reverts: flutter/flutter#148238
Initiated by: zanderso
Reason for reverting: Failures in post submit https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8748025189669617649/+/u/run_test.dart_for_web_canvaskit_tests_shard_and_subshard_3/stdout
Original PR Author: justinmc

Reviewed By: {hellohuanlin}

This change reverts the following previous change:
Reland of https://github.com/flutter/flutter/pull/143002, which was reverted in https://github.com/flutter/flutter/pull/148237 due to unresolved docs references. Not sure why those weren't caught in presubmit.

```
dartdoc:stdout: Generating docs for package flutter...
dartdoc:stderr:   error: unresolved doc reference [TextInput.showSystemContextMenu]
dartdoc:stderr:     from widgets.MediaQueryData.supportsShowingSystemContextMenu: (file:///b/s/w/ir/x/w/flutter/packages/flutter/lib/src/widgets/media_query.dart:579:14)
dartdoc:stderr:     in documentation inherited from widgets.MediaQueryData.supportsShowingSystemContextMenu: (file:///b/s/w/ir/x/w/flutter/packages/flutter/lib/src/widgets/media_query.dart:579:14)
dartdoc:stderr:   error: unresolved doc reference [showSystemContextMenu]
dartdoc:stderr:     from services.SystemContextMenuController.hide: (file:///b/s/w/ir/x/w/flutter/packages/flutter/lib/src/services/text_input.dart:2554:16)
dartdoc:stderr:   error: unresolved doc reference [hideSystemContextMenu]
dartdoc:stderr:     from services.SystemContextMenuController.show: (file:///b/s/w/ir/x/w/flutter/packages/flutter/lib/src/services/text_input.dart:2509:16)
```

examples/api/lib/widgets/system_context_menu/system_context_menu.0.dart

@@ -1,41 +0,0 @@
-// Copyright 2014 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'package:flutter/material.dart';
-
-/// Flutter code sample for [SystemContextMenu].
-
-void main() => runApp(const SystemContextMenuExampleApp());
-
-class SystemContextMenuExampleApp extends StatelessWidget {
-  const SystemContextMenuExampleApp({super.key});
-
-  @override
-  Widget build(BuildContext context) {
-    return MaterialApp(
-      home: Scaffold(
-        appBar: AppBar(
-          title: const Text('SystemContextMenu Basic Example'),
-        ),
-        body: Center(
-          child: TextField(
-            contextMenuBuilder: (BuildContext context, EditableTextState editableTextState) {
-              // If supported, show the system context menu.
-              if (SystemContextMenu.isSupported(context)) {
-                return SystemContextMenu.editableText(
-                  editableTextState: editableTextState,
-                );
-              }
-              // Otherwise, show the flutter-rendered context menu for the current
-              // platform.
-              return AdaptiveTextSelectionToolbar.editableText(
-                editableTextState: editableTextState,
-              );
-            },
-          ),
-        ),
-      ),
-    );
-  }
-}

examples/api/test/widgets/system_context_menu/system_context_menu.0_test.dart

@@ -1,67 +0,0 @@
-// Copyright 2014 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter_api_samples/widgets/system_context_menu/system_context_menu.0.dart' as example;
-import 'package:flutter_test/flutter_test.dart';
-
-void main() {
-  testWidgets('only shows the system context menu on iOS when MediaQuery says it is supported', (WidgetTester tester) async {
-    await tester.pumpWidget(
-      Builder(
-        builder: (BuildContext context) {
-          final MediaQueryData mediaQueryData = MediaQuery.of(context);
-          return MediaQuery(
-            data: mediaQueryData.copyWith(
-              // Faking this value, which is usually set to true only on
-              // devices running iOS 16+.
-              supportsShowingSystemContextMenu: defaultTargetPlatform == TargetPlatform.iOS,
-            ),
-            child: const example.SystemContextMenuExampleApp(),
-          );
-        },
-      ),
-    );
-
-    expect(find.byType(SystemContextMenu), findsNothing);
-
-    // Show the context menu.
-    final Finder textFinder = find.byType(EditableText);
-    await tester.longPress(textFinder);
-    tester.state<EditableTextState>(textFinder).showToolbar();
-    await tester.pumpAndSettle();
-
-    switch (defaultTargetPlatform) {
-      case TargetPlatform.iOS:
-        expect(find.byType(SystemContextMenu), findsOneWidget);
-        expect(find.byType(AdaptiveTextSelectionToolbar), findsNothing);
-      case TargetPlatform.android:
-      case TargetPlatform.fuchsia:
-      case TargetPlatform.linux:
-      case TargetPlatform.macOS:
-      case TargetPlatform.windows:
-        expect(find.byType(AdaptiveTextSelectionToolbar), findsOneWidget);
-        expect(find.byType(SystemContextMenu), findsNothing);
-    }
-  }, variant: TargetPlatformVariant.all(), skip: kIsWeb); // [intended]
-
-  testWidgets('does not show the system context menu when not supported', (WidgetTester tester) async {
-    await tester.pumpWidget(
-      // By default, MediaQueryData.supportsShowingSystemContextMenu is false.
-      const example.SystemContextMenuExampleApp(),
-    );
-
-    expect(find.byType(SystemContextMenu), findsNothing);
-
-    // Show the context menu.
-    final Finder textFinder = find.byType(EditableText);
-    await tester.longPress(textFinder);
-    tester.state<EditableTextState>(textFinder).showToolbar();
-    await tester.pumpAndSettle();
-
-    expect(find.byType(AdaptiveTextSelectionToolbar), findsOneWidget);
-    expect(find.byType(SystemContextMenu), findsNothing);
-  }, variant: TargetPlatformVariant.all(), skip: kIsWeb); // [intended]
-}

packages/flutter/lib/src/services/binding.dart

@@ -357,14 +357,8 @@ mixin ServicesBinding on BindingBase, SchedulerBinding {
 
   Future<dynamic> _handlePlatformMessage(MethodCall methodCall) async {
     final String method = methodCall.method;
+    assert(method == 'SystemChrome.systemUIChange' || method == 'System.requestAppExit');
     switch (method) {
-      // Called when the system dismisses the system context menu, such as when
-      // the user taps outside the menu. Not called when Flutter shows a new
-      // system context menu while an old one is still visible.
-      case 'ContextMenu.onDismissSystemContextMenu':
-        for (final SystemContextMenuClient client in _systemContextMenuClients) {
-          client.handleSystemHide();
-        }
       case 'SystemChrome.systemUIChange':
         final List<dynamic> args = methodCall.arguments as List<dynamic>;
         if (_systemUiChangeCallback != null) {
@@ -372,8 +366,6 @@ mixin ServicesBinding on BindingBase, SchedulerBinding {
         }
       case 'System.requestAppExit':
         return <String, dynamic>{'response': (await handleRequestAppExit()).name};
-      default:
-        throw AssertionError('Method "$method" not handled.');
     }
   }
 
@@ -518,19 +510,6 @@ mixin ServicesBinding on BindingBase, SchedulerBinding {
   Future<void> initializationComplete() async {
     await SystemChannels.platform.invokeMethod('System.initializationComplete');
   }
-
-  final Set<SystemContextMenuClient> _systemContextMenuClients = <SystemContextMenuClient>{};
-
-  /// Registers a [SystemContextMenuClient] that will receive system context
-  /// menu calls from the engine.
-  static void registerSystemContextMenuClient(SystemContextMenuClient client) {
-    instance._systemContextMenuClients.add(client);
-  }
-
-  /// Unregisters a [SystemContextMenuClient] so that it is no longer called.
-  static void unregisterSystemContextMenuClient(SystemContextMenuClient client) {
-    instance._systemContextMenuClients.remove(client);
-  }
 }
 
 /// Signature for listening to changes in the [SystemUiMode].
@@ -609,23 +588,3 @@ class _DefaultBinaryMessenger extends BinaryMessenger {
     }
   }
 }
-
-/// An interface to receive calls related to the system context menu from the
-/// engine.
-///
-/// Currently this is only supported on iOS 16+.
-///
-/// See also:
-///  * [SystemContextMenuController], which uses this to provide a fully
-///    featured way to control the system context menu.
-///  * [MediaQuery.maybeSupportsShowingSystemContextMenu], which indicates
-///    whether the system context menu is supported.
-///  * [SystemContextMenu], which provides a widget interface for displaying the
-///    system context menu.
-mixin SystemContextMenuClient {
-  /// Handles the system hiding a context menu.
-  ///
-  /// This is called for all instances of [SystemContextMenuController], so it's
-  /// not guaranteed that this instance was the one that was hidden.
-  void handleSystemHide();
-}

packages/flutter/lib/src/services/text_input.dart

@@ -17,7 +17,6 @@ import 'package:flutter/foundation.dart';
 import 'package:vector_math/vector_math_64.dart' show Matrix4;
 
 import 'autofill.dart';
-import 'binding.dart';
 import 'clipboard.dart' show Clipboard;
 import 'keyboard_inserted_content.dart';
 import 'message_codec.dart';
@@ -1809,7 +1808,7 @@ class TextInput {
 
   Future<dynamic> _handleTextInputInvocation(MethodCall methodCall) async {
     final String method = methodCall.method;
-    switch (method) {
+    switch (methodCall.method) {
       case 'TextInputClient.focusElement':
         final List<dynamic> args = methodCall.arguments as List<dynamic>;
         _scribbleClients[args[0]]?.onScribbleFocus(Offset((args[1] as num).toDouble(), (args[2] as num).toDouble()));
@@ -2404,178 +2403,3 @@ class _PlatformTextInputControl with TextInputControl {
     );
   }
 }
-
-/// Allows access to the system context menu.
-///
-/// The context menu is the menu that appears, for example, when doing text
-/// selection. Flutter typically draws this menu itself, but this class deals
-/// with the platform-rendered context menu.
-///
-/// Only one instance can be visible at a time. Calling [show] while the system
-/// context menu is already visible will hide it and show it again at the new
-/// [Rect]. An instance that is hidden is informed via [onSystemHide].
-///
-/// Currently this system context menu is bound to text input. The buttons that
-/// are shown and the actions they perform are dependent on the currently
-/// active [TextInputConnection]. Using this without an active
-/// [TextInputConnection] is a noop.
-///
-/// Call [dispose] when no longer needed.
-///
-/// See also:
-///
-///  * [ContextMenuController], which controls Flutter-drawn context menus.
-///  * [SystemContextMenu], which wraps this functionality in a widget.
-///  * [MediaQuery.maybeSupportsShowingSystemContextMenu], which indicates
-///    whether the system context menu is supported.
-class SystemContextMenuController with SystemContextMenuClient {
-  /// Creates an instance of [SystemContextMenuController].
-  ///
-  /// Not shown until [show] is called.
-  SystemContextMenuController({
-    this.onSystemHide,
-  }) {
-    ServicesBinding.registerSystemContextMenuClient(this);
-  }
-
-  /// Called when the system has hidden the context menu.
-  ///
-  /// For example, tapping outside of the context menu typically causes the
-  /// system to hide it directly. Flutter is made aware that the context menu is
-  /// no longer visible through this callback.
-  ///
-  /// This is not called when [show]ing a new system context menu causes another
-  /// to be hidden.
-  final VoidCallback? onSystemHide;
-
-  static const MethodChannel _channel = SystemChannels.platform;
-
-  static SystemContextMenuController? _lastShown;
-
-  /// The target [Rect] that was last given to [show].
-  ///
-  /// Null if [show] has not been called.
-  Rect? _lastTargetRect;
-
-  /// True when the instance most recently [show]n has been hidden by the
-  /// system.
-  bool _hiddenBySystem = false;
-
-  bool get _isVisible => this == _lastShown && !_hiddenBySystem;
-
-  /// After calling [dispose], this instance can no longer be used.
-  bool _isDisposed = false;
-
-  // Begin SystemContextMenuClient.
-
-  @override
-  void handleSystemHide() {
-    assert(!_isDisposed);
-    // If this instance wasn't being shown, then it wasn't the instance that was
-    // hidden.
-    if (!_isVisible) {
-      return;
-    }
-    if (_lastShown == this) {
-      _lastShown = null;
-    }
-    _hiddenBySystem = true;
-    onSystemHide?.call();
-  }
-
-  // End SystemContextMenuClient.
-
-  /// Shows the system context menu anchored on the given [Rect].
-  ///
-  /// The [Rect] represents what the context menu is pointing to. For example,
-  /// for some text selection, this would be the selection [Rect].
-  ///
-  /// There can only be one system context menu visible at a time. Calling this
-  /// while another system context menu is already visible will remove the old
-  /// menu before showing the new menu.
-  ///
-  /// Currently this system context menu is bound to text input. The buttons
-  /// that are shown and the actions they perform are dependent on the
-  /// currently active [TextInputConnection]. Using this without an active
-  /// [TextInputConnection] will be a noop.
-  ///
-  /// This is only supported on iOS 16.0 and later.
-  ///
-  /// See also:
-  ///
-  ///  * [hide], which hides the menu shown by this method.
-  ///  * [MediaQuery.supportsShowingSystemContextMenu], which indicates whether
-  ///    this method is supported on the current platform.
-  Future<void> show(Rect targetRect) {
-    assert(!_isDisposed);
-    assert(
-      TextInput._instance._currentConnection != null,
-      'Currently, the system context menu can only be shown for an active text input connection',
-    );
-
-    // Don't show the same thing that's already being shown.
-    if (_lastShown != null && _lastShown!._isVisible && _lastShown!._lastTargetRect == targetRect) {
-      return Future<void>.value();
-    }
-
-    assert(
-      _lastShown == null || _lastShown == this || !_lastShown!._isVisible,
-      'Attempted to show while another instance was still visible.',
-    );
-
-    _lastTargetRect = targetRect;
-    _lastShown = this;
-    _hiddenBySystem = false;
-    return _channel.invokeMethod<Map<String, dynamic>>(
-      'ContextMenu.showSystemContextMenu',
-      <String, dynamic>{
-        'targetRect': <String, double>{
-          'x': targetRect.left,
-          'y': targetRect.top,
-          'width': targetRect.width,
-          'height': targetRect.height,
-        },
-      },
-    );
-  }
-
-  /// Hides this system context menu.
-  ///
-  /// If this hasn't been shown, or if another instance has hidden this menu,
-  /// does nothing.
-  ///
-  /// Currently this is only supported on iOS 16.0 and later.
-  ///
-  /// See also:
-  ///
-  ///  * [show], which shows the menu hidden by this method.
-  ///  * [MediaQuery.supportsShowingSystemContextMenu], which indicates whether
-  ///    the system context menu is supported on the current platform.
-  Future<void> hide() async {
-    assert(!_isDisposed);
-    // This check prevents a given instance from accidentally hiding some other
-    // instance, since only one can be visible at a time.
-    if (this != _lastShown) {
-      return;
-    }
-    _lastShown = null;
-    // This may be called unnecessarily in the case where the user has already
-    // hidden the menu (for example by tapping the screen).
-    return _channel.invokeMethod<void>(
-      'ContextMenu.hideSystemContextMenu',
-    );
-  }
-
-  @override
-  String toString() {
-    return 'SystemContextMenuController(onSystemHide=$onSystemHide, _hiddenBySystem=$_hiddenBySystem, _isVisible=$_isVisible, _isDiposed=$_isDisposed)';
-  }
-
-  /// Used to release resources when this instance will never be used again.
-  void dispose() {
-    assert(!_isDisposed);
-    hide();
-    ServicesBinding.unregisterSystemContextMenuClient(this);
-    _isDisposed = true;
-  }
-}

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

@@ -2786,12 +2786,7 @@ class EditableTextState extends State<EditableText> with AutomaticKeepAliveClien
 
   /// Gets the line heights at the start and end of the selection for the given
   /// [EditableTextState].
-  ///
+  _GlyphHeights _getGlyphHeights() {
-  /// See also:
-  ///
-  /// * [TextSelectionToolbarAnchors.getSelectionRect], which depends on this
-  ///   information.
-  ({double startGlyphHeight, double endGlyphHeight}) getGlyphHeights() {
     final TextSelection selection = textEditingValue.selection;
 
     // Only calculate handle rects if the text in the previous frame
@@ -2805,9 +2800,9 @@ class EditableTextState extends State<EditableText> with AutomaticKeepAliveClien
     final String prevText = span.toPlainText();
     final String currText = textEditingValue.text;
     if (prevText != currText || !selection.isValid || selection.isCollapsed) {
-      return (
+      return _GlyphHeights(
-        startGlyphHeight: renderEditable.preferredLineHeight,
+        start: renderEditable.preferredLineHeight,
-        endGlyphHeight: renderEditable.preferredLineHeight,
+        end: renderEditable.preferredLineHeight,
       );
     }
 
@@ -2822,9 +2817,9 @@ class EditableTextState extends State<EditableText> with AutomaticKeepAliveClien
       start: selection.end - lastSelectedGraphemeExtent,
       end: selection.end,
     ));
-    return (
+    return _GlyphHeights(
-      startGlyphHeight: startCharacterRect?.height ?? renderEditable.preferredLineHeight,
+      start: startCharacterRect?.height ?? renderEditable.preferredLineHeight,
-      endGlyphHeight: endCharacterRect?.height ?? renderEditable.preferredLineHeight,
+      end: endCharacterRect?.height ?? renderEditable.preferredLineHeight,
     );
   }
 
@@ -2843,14 +2838,14 @@ class EditableTextState extends State<EditableText> with AutomaticKeepAliveClien
       );
     }
 
-    final (startGlyphHeight: double startGlyphHeight, endGlyphHeight: double endGlyphHeight) = getGlyphHeights();
+    final _GlyphHeights glyphHeights = _getGlyphHeights();
     final TextSelection selection = textEditingValue.selection;
     final List<TextSelectionPoint> points =
         renderEditable.getEndpointsForSelection(selection);
     return TextSelectionToolbarAnchors.fromSelection(
       renderBox: renderEditable,
-      startGlyphHeight: startGlyphHeight,
+      startGlyphHeight: glyphHeights.start,
-      endGlyphHeight: endGlyphHeight,
+      endGlyphHeight: glyphHeights.end,
       selectionEndpoints: points,
     );
   }
@@ -6031,6 +6026,21 @@ class _CopySelectionAction extends ContextAction<CopySelectionTextIntent> {
   bool get isActionEnabled => state._value.selection.isValid && !state._value.selection.isCollapsed;
 }
 
+/// The start and end glyph heights of some range of text.
+@immutable
+class _GlyphHeights {
+  const _GlyphHeights({
+    required this.start,
+    required this.end,
+  });
+
+  /// The glyph height of the first line.
+  final double start;
+
+  /// The glyph height of the last line.
+  final double end;
+}
+
 /// A [ClipboardStatusNotifier] whose [value] is hardcoded to
 /// [ClipboardStatus.pasteable].
 ///

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

@@ -74,8 +74,6 @@ enum _MediaQueryAspect {
   gestureSettings,
   /// Specifies the aspect corresponding to [MediaQueryData.displayFeatures].
   displayFeatures,
-  /// Specifies the aspect corresponding to [MediaQueryData.supportsShowingSystemContextMenu].
-  supportsShowingSystemContextMenu,
 }
 
 /// Information about a piece of media (e.g., a window).
@@ -175,7 +173,6 @@ class MediaQueryData {
     this.navigationMode = NavigationMode.traditional,
     this.gestureSettings = const DeviceGestureSettings(touchSlop: kTouchSlop),
     this.displayFeatures = const <ui.DisplayFeature>[],
-    this.supportsShowingSystemContextMenu = false,
   }) : _textScaleFactor = textScaleFactor,
        _textScaler = textScaler,
        assert(
@@ -253,8 +250,7 @@ class MediaQueryData {
       alwaysUse24HourFormat = platformData?.alwaysUse24HourFormat ?? view.platformDispatcher.alwaysUse24HourFormat,
       navigationMode = platformData?.navigationMode ?? NavigationMode.traditional,
       gestureSettings = DeviceGestureSettings.fromView(view),
-      displayFeatures = view.displayFeatures,
+      displayFeatures = view.displayFeatures;
-      supportsShowingSystemContextMenu = platformData?.supportsShowingSystemContextMenu ?? view.platformDispatcher.supportsShowingSystemContextMenu;
 
   static TextScaler _textScalerFromView(ui.FlutterView view, MediaQueryData? platformData) {
     final double scaleFactor = platformData?.textScaleFactor ?? view.platformDispatcher.textScaleFactor;
@@ -566,19 +562,6 @@ class MediaQueryData {
   ///  [dart:ui.DisplayFeatureType.hinge]).
   final List<ui.DisplayFeature> displayFeatures;
 
-  /// Whether showing the system context menu is supported.
-  ///
-  /// For example, on iOS 16.0 and above, the system text selection context menu
-  /// may be shown instead of the Flutter-drawn context menu in order to avoid
-  /// the iOS clipboard access notification when the "Paste" button is pressed.
-  ///
-  /// See also:
-  ///
-  ///  * [SystemContextMenuController] and [SystemContextMenu], which may be
-  ///    used to show the system context menu when this flag indicates it's
-  ///    supported.
-  final bool supportsShowingSystemContextMenu;
-
   /// The orientation of the media (e.g., whether the device is in landscape or
   /// portrait mode).
   Orientation get orientation {
@@ -615,7 +598,6 @@ class MediaQueryData {
     NavigationMode? navigationMode,
     DeviceGestureSettings? gestureSettings,
     List<ui.DisplayFeature>? displayFeatures,
-    bool? supportsShowingSystemContextMenu,
   }) {
     assert(textScaleFactor == null || textScaler == null);
     if (textScaleFactor != null) {
@@ -640,7 +622,6 @@ class MediaQueryData {
       navigationMode: navigationMode ?? this.navigationMode,
       gestureSettings: gestureSettings ?? this.gestureSettings,
       displayFeatures: displayFeatures ?? this.displayFeatures,
-      supportsShowingSystemContextMenu: supportsShowingSystemContextMenu ?? this.supportsShowingSystemContextMenu,
     );
   }
 
@@ -833,8 +814,7 @@ class MediaQueryData {
         && other.boldText == boldText
         && other.navigationMode == navigationMode
         && other.gestureSettings == gestureSettings
-        && listEquals(other.displayFeatures, displayFeatures)
+        && listEquals(other.displayFeatures, displayFeatures);
-        && other.supportsShowingSystemContextMenu == supportsShowingSystemContextMenu;
   }
 
   @override
@@ -856,7 +836,6 @@ class MediaQueryData {
     navigationMode,
     gestureSettings,
     Object.hashAll(displayFeatures),
-    supportsShowingSystemContextMenu,
   );
 
   @override
@@ -880,7 +859,6 @@ class MediaQueryData {
       'navigationMode: ${navigationMode.name}',
       'gestureSettings: $gestureSettings',
       'displayFeatures: $displayFeatures',
-      'supportsShowingSystemContextMenu: $supportsShowingSystemContextMenu',
     ];
     return '${objectRuntimeType(this, 'MediaQueryData')}(${properties.join(', ')})';
   }
@@ -1653,26 +1631,6 @@ class MediaQuery extends InheritedModel<_MediaQueryAspect> {
   /// {@macro flutter.widgets.media_query.MediaQuery.dontUseMaybeOf}
   static List<ui.DisplayFeature>? maybeDisplayFeaturesOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.displayFeatures)?.displayFeatures;
 
-  /// Returns [MediaQueryData.supportsShowingSystemContextMenu] for the nearest
-  /// [MediaQuery] ancestor or throws an exception, if no such ancestor exists.
-  ///
-  /// Use of this method will cause the given [context] to rebuild any time that
-  /// the [MediaQueryData.supportsShowingSystemContextMenu] property of the
-  /// ancestor [MediaQuery] changes.
-  ///
-  /// {@macro flutter.widgets.media_query.MediaQuery.dontUseOf}
-  static bool supportsShowingSystemContextMenu(BuildContext context) => _of(context, _MediaQueryAspect.supportsShowingSystemContextMenu).supportsShowingSystemContextMenu;
-
-  /// Returns [MediaQueryData.supportsShowingSystemContextMenu] for the nearest
-  /// [MediaQuery] ancestor or null, if no such ancestor exists.
-  ///
-  /// Use of this method will cause the given [context] to rebuild any time that
-  /// the [MediaQueryData.supportsShowingSystemContextMenu] property of the
-  /// ancestor [MediaQuery] changes.
-  ///
-  /// {@macro flutter.widgets.media_query.MediaQuery.dontUseMaybeOf}
-  static bool? maybeSupportsShowingSystemContextMenu(BuildContext context) => _maybeOf(context, _MediaQueryAspect.supportsShowingSystemContextMenu)?.supportsShowingSystemContextMenu;
-
   @override
   bool updateShouldNotify(MediaQuery oldWidget) => data != oldWidget.data;
 
@@ -1705,7 +1663,6 @@ class MediaQuery extends InheritedModel<_MediaQueryAspect> {
       _MediaQueryAspect.systemGestureInsets => data.systemGestureInsets != oldWidget.data.systemGestureInsets,
       _MediaQueryAspect.accessibleNavigation => data.accessibleNavigation != oldWidget.data.accessibleNavigation,
       _MediaQueryAspect.alwaysUse24HourFormat => data.alwaysUse24HourFormat != oldWidget.data.alwaysUse24HourFormat,
-      _MediaQueryAspect.supportsShowingSystemContextMenu => data.supportsShowingSystemContextMenu != oldWidget.data.supportsShowingSystemContextMenu,
     });
   }
 }

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

@@ -1,132 +0,0 @@
-// Copyright 2014 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'package:flutter/rendering.dart';
-import 'package:flutter/services.dart';
-
-import 'basic.dart';
-import 'editable_text.dart';
-import 'framework.dart';
-import 'media_query.dart';
-import 'text_selection_toolbar_anchors.dart';
-
-/// Displays the system context menu on top of the Flutter view.
-///
-/// Currently, only supports iOS 16.0 and above and displays nothing on other
-/// platforms.
-///
-/// The context menu is the menu that appears, for example, when doing text
-/// selection. Flutter typically draws this menu itself, but this class deals
-/// with the platform-rendered context menu instead.
-///
-/// There can only be one system context menu visible at a time. Building this
-/// widget when the system context menu is already visible will hide the old one
-/// and display this one. A system context menu that is hidden is informed via
-/// [onSystemHide].
-///
-/// To check if the current device supports showing the system context menu,
-/// call [isSupported].
-///
-/// {@tool dartpad}
-/// This example shows how to create a [TextField] that uses the system context
-/// menu where supported and does not show a system notification when the user
-/// presses the "Paste" button.
-///
-/// ** See code in examples/api/lib/widgets/system_context_menu/system_context_menu.0.dart **
-/// {@end-tool}
-///
-/// See also:
-///
-///  * [SystemContextMenuController], which directly controls the hiding and
-///    showing of the system context menu.
-class SystemContextMenu extends StatefulWidget {
-  /// Creates an instance of [SystemContextMenu] that points to the given
-  /// [anchor].
-  const SystemContextMenu._({
-    super.key,
-    required this.anchor,
-    this.onSystemHide,
-  });
-
-  /// Creates an instance of [SystemContextMenu] for the field indicated by the
-  /// given [EditableTextState].
-  factory SystemContextMenu.editableText({
-    Key? key,
-    required EditableTextState editableTextState,
-  }) {
-    final (
-      startGlyphHeight: double startGlyphHeight,
-      endGlyphHeight: double endGlyphHeight,
-    ) = editableTextState.getGlyphHeights();
-    return SystemContextMenu._(
-      key: key,
-      anchor: TextSelectionToolbarAnchors.getSelectionRect(
-        editableTextState.renderEditable,
-        startGlyphHeight,
-        endGlyphHeight,
-        editableTextState.renderEditable.getEndpointsForSelection(
-          editableTextState.textEditingValue.selection,
-        ),
-      ),
-      onSystemHide: () {
-        editableTextState.hideToolbar();
-      },
-    );
-  }
-
-  /// The [Rect] that the context menu should point to.
-  final Rect anchor;
-
-  /// Called when the system hides this context menu.
-  ///
-  /// For example, tapping outside of the context menu typically causes the
-  /// system to hide the menu.
-  ///
-  /// This is not called when showing a new system context menu causes another
-  /// to be hidden.
-  final VoidCallback? onSystemHide;
-
-  /// Whether the current device supports showing the system context menu.
-  ///
-  /// Currently, this is only supported on newer versions of iOS.
-  static bool isSupported(BuildContext context) {
-    return MediaQuery.maybeSupportsShowingSystemContextMenu(context) ?? false;
-  }
-
-  @override
-  State<SystemContextMenu> createState() => _SystemContextMenuState();
-}
-
-class _SystemContextMenuState extends State<SystemContextMenu> {
-  late final SystemContextMenuController _systemContextMenuController;
-
-  @override
-  void initState() {
-    super.initState();
-    _systemContextMenuController = SystemContextMenuController(
-      onSystemHide: widget.onSystemHide,
-    );
-    _systemContextMenuController.show(widget.anchor);
-  }
-
-  @override
-  void didUpdateWidget(SystemContextMenu oldWidget) {
-    super.didUpdateWidget(oldWidget);
-    if (widget.anchor != oldWidget.anchor) {
-      _systemContextMenuController.show(widget.anchor);
-    }
-  }
-
-  @override
-  void dispose() {
-    _systemContextMenuController.dispose();
-    super.dispose();
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    assert(SystemContextMenu.isSupported(context));
-    return const SizedBox.shrink();
-  }
-}

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

@@ -30,17 +30,30 @@ class TextSelectionToolbarAnchors {
     required double endGlyphHeight,
     required List<TextSelectionPoint> selectionEndpoints,
   }) {
-    final Rect selectionRect = getSelectionRect(
+    final Rect editingRegion = Rect.fromPoints(
-      renderBox,
+      renderBox.localToGlobal(Offset.zero),
-      startGlyphHeight,
+      renderBox.localToGlobal(renderBox.size.bottomRight(Offset.zero)),
-      endGlyphHeight,
-      selectionEndpoints,
     );
-    if (selectionRect == Rect.zero) {
+
+    if (editingRegion.left.isNaN || editingRegion.top.isNaN
+      || editingRegion.right.isNaN || editingRegion.bottom.isNaN) {
       return const TextSelectionToolbarAnchors(primaryAnchor: Offset.zero);
     }
 
-    final Rect editingRegion = _getEditingRegion(renderBox);
+    final bool isMultiline = selectionEndpoints.last.point.dy - selectionEndpoints.first.point.dy >
+        endGlyphHeight / 2;
+
+    final Rect selectionRect = Rect.fromLTRB(
+      isMultiline
+          ? editingRegion.left
+          : editingRegion.left + selectionEndpoints.first.point.dx,
+      editingRegion.top + selectionEndpoints.first.point.dy - startGlyphHeight,
+      isMultiline
+          ? editingRegion.right
+          : editingRegion.left + selectionEndpoints.last.point.dx,
+      editingRegion.top + selectionEndpoints.last.point.dy,
+    );
+
     return TextSelectionToolbarAnchors(
       primaryAnchor: Offset(
         selectionRect.left + selectionRect.width / 2,
@@ -53,44 +66,6 @@ class TextSelectionToolbarAnchors {
     );
   }
 
-  /// Returns the [Rect] of the [RenderBox] in global coordinates.
-  static Rect _getEditingRegion(RenderBox renderBox) {
-    return Rect.fromPoints(
-      renderBox.localToGlobal(Offset.zero),
-      renderBox.localToGlobal(renderBox.size.bottomRight(Offset.zero)),
-    );
-  }
-
-  /// Returns the [Rect] covering the given selection in the given [RenderBox]
-  /// in global coordinates.
-  static Rect getSelectionRect(
-    RenderBox renderBox,
-    double startGlyphHeight,
-    double endGlyphHeight,
-    List<TextSelectionPoint> selectionEndpoints,
-  ) {
-    final Rect editingRegion = _getEditingRegion(renderBox);
-
-    if (editingRegion.left.isNaN || editingRegion.top.isNaN
-      || editingRegion.right.isNaN || editingRegion.bottom.isNaN) {
-      return Rect.zero;
-    }
-
-    final bool isMultiline = selectionEndpoints.last.point.dy - selectionEndpoints.first.point.dy >
-        endGlyphHeight / 2;
-
-    return Rect.fromLTRB(
-      isMultiline
-          ? editingRegion.left
-          : editingRegion.left + selectionEndpoints.first.point.dx,
-      editingRegion.top + selectionEndpoints.first.point.dy - startGlyphHeight,
-      isMultiline
-          ? editingRegion.right
-          : editingRegion.left + selectionEndpoints.last.point.dx,
-      editingRegion.top + selectionEndpoints.last.point.dy,
-    );
-  }
-
   /// The location that the toolbar should attempt to position itself at.
   ///
   /// If the toolbar doesn't fit at this location, use [secondaryAnchor] if it

packages/flutter/lib/widgets.dart

@@ -141,7 +141,6 @@ export 'src/widgets/snapshot_widget.dart';
 export 'src/widgets/spacer.dart';
 export 'src/widgets/spell_check.dart';
 export 'src/widgets/status_transitions.dart';
-export 'src/widgets/system_context_menu.dart';
 export 'src/widgets/table.dart';
 export 'src/widgets/tap_region.dart';
 export 'src/widgets/text.dart';

packages/flutter/test/services/system_context_menu_controller_test.dart

@@ -1,257 +0,0 @@
-// Copyright 2014 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'package:flutter/services.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-import './text_input_utils.dart';
-
-void main() {
-  final TestWidgetsFlutterBinding binding = TestWidgetsFlutterBinding.ensureInitialized();
-
-  test('showing and hiding one controller', () {
-    // Create an active connection, which is required to show the system menu.
-    final FakeTextInputClient client = FakeTextInputClient(const TextEditingValue(text: 'test1'));
-    final TextInputConnection connection = TextInput.attach(client, client.configuration);
-    addTearDown(() {
-      connection.close();
-    });
-
-    final List<Map<String, double>> targetRects = <Map<String, double>>[];
-    int hideCount = 0;
-    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
-      .setMockMethodCallHandler(SystemChannels.platform, (MethodCall methodCall) async {
-        switch (methodCall.method) {
-          case 'ContextMenu.showSystemContextMenu':
-            final Map<String, dynamic> arguments = methodCall.arguments as Map<String, dynamic>;
-            final Map<String, dynamic> untypedTargetRect = arguments['targetRect'] as Map<String, dynamic>;
-            final Map<String, double> lastTargetRect = untypedTargetRect.map((String key, dynamic value) {
-              return MapEntry<String, double>(key, value as double);
-            });
-            targetRects.add(lastTargetRect);
-          case 'ContextMenu.hideSystemContextMenu':
-            hideCount += 1;
-        }
-        return;
-      });
-    addTearDown(() {
-      TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
-          .setMockMethodCallHandler(SystemChannels.platform, null);
-    });
-
-    final SystemContextMenuController controller = SystemContextMenuController();
-    addTearDown(() {
-      controller.dispose();
-    });
-
-    expect(targetRects, isEmpty);
-    expect(hideCount, 0);
-
-    // Showing calls the platform.
-    const Rect rect1 = Rect.fromLTWH(0.0, 0.0, 100.0, 100.0);
-    controller.show(rect1);
-    expect(targetRects, hasLength(1));
-    expect(targetRects.last['x'], rect1.left);
-    expect(targetRects.last['y'], rect1.top);
-    expect(targetRects.last['width'], rect1.width);
-    expect(targetRects.last['height'], rect1.height);
-
-    // Showing the same thing again does nothing.
-    controller.show(rect1);
-    expect(targetRects, hasLength(1));
-
-    // Showing a new rect calls the platform.
-    const Rect rect2 = Rect.fromLTWH(1.0, 1.0, 200.0, 200.0);
-    controller.show(rect2);
-    expect(targetRects, hasLength(2));
-    expect(targetRects.last['x'], rect2.left);
-    expect(targetRects.last['y'], rect2.top);
-    expect(targetRects.last['width'], rect2.width);
-    expect(targetRects.last['height'], rect2.height);
-
-    // Hiding calls the platform.
-    controller.hide();
-    expect(hideCount, 1);
-
-    // Hiding again does nothing.
-    controller.hide();
-    expect(hideCount, 1);
-
-    // Showing the last shown rect calls the platform.
-    controller.show(rect2);
-    expect(targetRects, hasLength(3));
-    expect(targetRects.last['x'], rect2.left);
-    expect(targetRects.last['y'], rect2.top);
-    expect(targetRects.last['width'], rect2.width);
-    expect(targetRects.last['height'], rect2.height);
-
-    controller.hide();
-    expect(hideCount, 2);
-  });
-
-  test('the system can hide the menu with handleSystemHide', () async {
-    // Create an active connection, which is required to show the system menu.
-    final FakeTextInputClient client = FakeTextInputClient(const TextEditingValue(text: 'test1'));
-    final TextInputConnection connection = TextInput.attach(client, client.configuration);
-    addTearDown(() {
-      connection.close();
-    });
-
-    final List<Map<String, double>> targetRects = <Map<String, double>>[];
-    int hideCount = 0;
-    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
-      .setMockMethodCallHandler(SystemChannels.platform, (MethodCall methodCall) async {
-        switch (methodCall.method) {
-          case 'ContextMenu.showSystemContextMenu':
-            final Map<String, dynamic> arguments = methodCall.arguments as Map<String, dynamic>;
-            final Map<String, dynamic> untypedTargetRect = arguments['targetRect'] as Map<String, dynamic>;
-            final Map<String, double> lastTargetRect = untypedTargetRect.map((String key, dynamic value) {
-              return MapEntry<String, double>(key, value as double);
-            });
-            targetRects.add(lastTargetRect);
-          case 'ContextMenu.hideSystemContextMenu':
-            hideCount += 1;
-        }
-        return;
-      });
-    addTearDown(() {
-      TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
-          .setMockMethodCallHandler(SystemChannels.platform, null);
-    });
-
-    int systemHideCount = 0;
-    final SystemContextMenuController controller = SystemContextMenuController(
-      onSystemHide: () {
-        systemHideCount += 1;
-      },
-    );
-    addTearDown(() {
-      controller.dispose();
-    });
-
-    expect(targetRects, isEmpty);
-    expect(hideCount, 0);
-    expect(systemHideCount, 0);
-
-    // Showing calls the platform.
-    const Rect rect1 = Rect.fromLTWH(0.0, 0.0, 100.0, 100.0);
-    controller.show(rect1);
-    expect(targetRects, hasLength(1));
-    expect(targetRects.last['x'], rect1.left);
-    expect(targetRects.last['y'], rect1.top);
-    expect(targetRects.last['width'], rect1.width);
-    expect(targetRects.last['height'], rect1.height);
-
-    // If the system hides the menu, onSystemHide is called.
-    final ByteData? messageBytes = const JSONMessageCodec().encodeMessage(<String, dynamic>{
-      'method': 'ContextMenu.onDismissSystemContextMenu',
-    });
-    await binding.defaultBinaryMessenger.handlePlatformMessage(
-      'flutter/platform',
-      messageBytes,
-      (ByteData? data) {},
-    );
-    expect(hideCount, 0);
-    expect(systemHideCount, 1);
-
-    // Hiding does not call the platform, since the menu was already hidden.
-    controller.hide();
-    expect(hideCount, 0);
-  });
-
-  test('showing a second controller while one is visible is an error', () {
-    // Create an active connection, which is required to show the system menu.
-    final FakeTextInputClient client = FakeTextInputClient(const TextEditingValue(text: 'test1'));
-    final TextInputConnection connection = TextInput.attach(client, client.configuration);
-    addTearDown(() {
-      connection.close();
-    });
-
-    final SystemContextMenuController controller1 = SystemContextMenuController();
-    addTearDown(() {
-      controller1.dispose();
-    });
-    const Rect rect1 = Rect.fromLTWH(0.0, 0.0, 100.0, 100.0);
-    expect(() { controller1.show(rect1); }, isNot(throwsAssertionError));
-
-    final SystemContextMenuController controller2 = SystemContextMenuController();
-    addTearDown(() {
-      controller2.dispose();
-    });
-    const Rect rect2 = Rect.fromLTWH(1.0, 1.0, 200.0, 200.0);
-    expect(() { controller2.show(rect2); }, throwsAssertionError);
-
-    controller1.hide();
-  });
-
-  test('showing and hiding two controllers', () {
-    // Create an active connection, which is required to show the system menu.
-    final FakeTextInputClient client = FakeTextInputClient(const TextEditingValue(text: 'test1'));
-    final TextInputConnection connection = TextInput.attach(client, client.configuration);
-    addTearDown(() {
-      connection.close();
-    });
-
-    final List<Map<String, double>> targetRects = <Map<String, double>>[];
-    int hideCount = 0;
-    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
-      .setMockMethodCallHandler(SystemChannels.platform, (MethodCall methodCall) async {
-        switch (methodCall.method) {
-          case 'ContextMenu.showSystemContextMenu':
-            final Map<String, dynamic> arguments = methodCall.arguments as Map<String, dynamic>;
-            final Map<String, dynamic> untypedTargetRect = arguments['targetRect'] as Map<String, dynamic>;
-            final Map<String, double> lastTargetRect = untypedTargetRect.map((String key, dynamic value) {
-              return MapEntry<String, double>(key, value as double);
-            });
-            targetRects.add(lastTargetRect);
-          case 'ContextMenu.hideSystemContextMenu':
-            hideCount += 1;
-        }
-        return;
-      });
-    addTearDown(() {
-      TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
-          .setMockMethodCallHandler(SystemChannels.platform, null);
-    });
-
-    final SystemContextMenuController controller1 = SystemContextMenuController();
-    addTearDown(() {
-      controller1.dispose();
-    });
-
-    expect(targetRects, isEmpty);
-    expect(hideCount, 0);
-
-    // Showing calls the platform.
-    const Rect rect1 = Rect.fromLTWH(0.0, 0.0, 100.0, 100.0);
-    controller1.show(rect1);
-    expect(targetRects, hasLength(1));
-    expect(targetRects.last['x'], rect1.left);
-
-    // Hiding calls the platform.
-    controller1.hide();
-    expect(hideCount, 1);
-
-    // Showing a new controller calls the platform.
-    final SystemContextMenuController controller2 = SystemContextMenuController();
-    addTearDown(() {
-      controller2.dispose();
-    });
-    const Rect rect2 = Rect.fromLTWH(1.0, 1.0, 200.0, 200.0);
-    controller2.show(rect2);
-    expect(targetRects, hasLength(2));
-    expect(targetRects.last['x'], rect2.left);
-    expect(targetRects.last['y'], rect2.top);
-    expect(targetRects.last['width'], rect2.width);
-    expect(targetRects.last['height'], rect2.height);
-
-    // Hiding the old controller does nothing.
-    controller1.hide();
-    expect(hideCount, 1);
-
-    // Hiding the new controller calls the platform.
-    controller2.hide();
-    expect(hideCount, 2);
-  });
-}

packages/flutter/test/services/text_input_utils.dart

@@ -90,81 +90,3 @@ class FakeScribbleElement implements ScribbleClient {
     latestMethodCall = 'onScribbleFocus';
   }
 }
-
-class FakeTextInputClient with TextInputClient {
-  FakeTextInputClient(this.currentTextEditingValue);
-
-  String latestMethodCall = '';
-  final List<String> performedSelectors = <String>[];
-  late Map<String, dynamic>? latestPrivateCommandData;
-
-  @override
-  TextEditingValue currentTextEditingValue;
-
-  @override
-  AutofillScope? get currentAutofillScope => null;
-
-  @override
-  void performAction(TextInputAction action) {
-    latestMethodCall = 'performAction';
-  }
-
-  @override
-  void performPrivateCommand(String action, Map<String, dynamic>? data) {
-    latestMethodCall = 'performPrivateCommand';
-    latestPrivateCommandData = data;
-  }
-
-  @override
-  void insertContent(KeyboardInsertedContent content) {
-    latestMethodCall = 'commitContent';
-  }
-
-  @override
-  void updateEditingValue(TextEditingValue value) {
-    latestMethodCall = 'updateEditingValue';
-  }
-
-  @override
-  void updateFloatingCursor(RawFloatingCursorPoint point) {
-    latestMethodCall = 'updateFloatingCursor';
-  }
-
-  @override
-  void connectionClosed() {
-    latestMethodCall = 'connectionClosed';
-  }
-
-  @override
-  void showAutocorrectionPromptRect(int start, int end) {
-    latestMethodCall = 'showAutocorrectionPromptRect';
-  }
-
-  @override
-  void showToolbar() {
-    latestMethodCall = 'showToolbar';
-  }
-
-  TextInputConfiguration get configuration => const TextInputConfiguration();
-
-  @override
-  void didChangeInputControl(TextInputControl? oldControl, TextInputControl? newControl) {
-    latestMethodCall = 'didChangeInputControl';
-  }
-
-  @override
-  void insertTextPlaceholder(Size size) {
-    latestMethodCall = 'insertTextPlaceholder';
-  }
-
-  @override
-  void removeTextPlaceholder() {
-    latestMethodCall = 'removeTextPlaceholder';
-  }
-
-  @override
-  void performSelector(String selectorName) {
-    latestMethodCall = 'performSelector';
-    performedSelectors.add(selectorName);
-  }
-}

packages/flutter/test/widgets/system_context_menu_test.dart

@@ -1,415 +0,0 @@
-// Copyright 2014 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-void main() {
-  final TestWidgetsFlutterBinding binding = TestWidgetsFlutterBinding.ensureInitialized();
-
-  testWidgets('asserts when built on an unsupported device', (WidgetTester tester) async {
-    final TextEditingController controller = TextEditingController(
-      text: 'one two three',
-    );
-    await tester.pumpWidget(
-      // By default, MediaQueryData.supportsShowingSystemContextMenu is false.
-      MaterialApp(
-        home: Scaffold(
-          body: Center(
-            child: TextField(
-              controller: controller,
-              contextMenuBuilder: (BuildContext context, EditableTextState editableTextState) {
-                return SystemContextMenu.editableText(
-                  editableTextState: editableTextState,
-                );
-              },
-            ),
-          ),
-        ),
-      ),
-    );
-
-    await tester.tap(find.byType(TextField));
-    final EditableTextState state = tester.state<EditableTextState>(find.byType(EditableText));
-    expect(state.showToolbar(), true);
-    await tester.pump();
-
-    expect(tester.takeException(), isAssertionError);
-  }, variant: TargetPlatformVariant.all());
-
-  testWidgets('can be shown and hidden like a normal context menu', (WidgetTester tester) async {
-    final TextEditingController controller = TextEditingController(
-      text: 'one two three',
-    );
-    await tester.pumpWidget(
-      Builder(
-        builder: (BuildContext context) {
-          final MediaQueryData mediaQueryData = MediaQuery.of(context);
-          return MediaQuery(
-            data: mediaQueryData.copyWith(
-              supportsShowingSystemContextMenu: true,
-            ),
-            child: MaterialApp(
-              home: Scaffold(
-                body: Center(
-                  child: TextField(
-                    controller: controller,
-                    contextMenuBuilder: (BuildContext context, EditableTextState editableTextState) {
-                      return SystemContextMenu.editableText(
-                        editableTextState: editableTextState,
-                      );
-                    },
-                  ),
-                ),
-              ),
-            ),
-          );
-        },
-      ),
-    );
-
-    expect(find.byType(SystemContextMenu), findsNothing);
-
-    await tester.tap(find.byType(TextField));
-    final EditableTextState state = tester.state<EditableTextState>(find.byType(EditableText));
-    expect(state.showToolbar(), true);
-    await tester.pump();
-    expect(find.byType(SystemContextMenu), findsOneWidget);
-
-    state.hideToolbar();
-    await tester.pump();
-    expect(find.byType(SystemContextMenu), findsNothing);
-  }, variant: TargetPlatformVariant.only(TargetPlatform.iOS));
-
-  testWidgets('can be updated.', (WidgetTester tester) async {
-    final List<Map<String, double>> targetRects = <Map<String, double>>[];
-    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
-      .setMockMethodCallHandler(SystemChannels.platform, (MethodCall methodCall) async {
-        if (methodCall.method == 'ContextMenu.showSystemContextMenu') {
-          final Map<String, dynamic> arguments = methodCall.arguments as Map<String, dynamic>;
-          final Map<String, dynamic> untypedTargetRect = arguments['targetRect'] as Map<String, dynamic>;
-          final Map<String, double> lastTargetRect = untypedTargetRect.map((String key, dynamic value) {
-            return MapEntry<String, double>(key, value as double);
-          });
-          targetRects.add(lastTargetRect);
-        }
-        return;
-      });
-    addTearDown(() {
-      TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
-          .setMockMethodCallHandler(SystemChannels.platform, null);
-    });
-
-    final TextEditingController controller = TextEditingController(
-      text: 'one two three',
-    );
-    await tester.pumpWidget(
-      Builder(
-        builder: (BuildContext context) {
-          final MediaQueryData mediaQueryData = MediaQuery.of(context);
-          return MediaQuery(
-            data: mediaQueryData.copyWith(
-              supportsShowingSystemContextMenu: true,
-            ),
-            child: MaterialApp(
-              home: Scaffold(
-                body: Center(
-                  child: TextField(
-                    controller: controller,
-                    contextMenuBuilder: (BuildContext context, EditableTextState editableTextState) {
-                      return SystemContextMenu.editableText(
-                        editableTextState: editableTextState,
-                      );
-                    },
-                  ),
-                ),
-              ),
-            ),
-          );
-        },
-      ),
-    );
-
-    expect(targetRects, isEmpty);
-
-    await tester.tap(find.byType(TextField));
-    final EditableTextState state = tester.state<EditableTextState>(find.byType(EditableText));
-    expect(state.showToolbar(), true);
-    await tester.pump();
-
-    expect(targetRects, hasLength(1));
-    expect(targetRects.last, containsPair('width', 0.0));
-
-    controller.selection = const TextSelection(
-      baseOffset: 4,
-      extentOffset: 7,
-    );
-    await tester.pumpAndSettle();
-
-    expect(targetRects, hasLength(2));
-    expect(targetRects.last['width'], greaterThan(0.0));
-  }, variant: TargetPlatformVariant.only(TargetPlatform.iOS));
-
-  testWidgets('can be rebuilt', (WidgetTester tester) async {
-    final TextEditingController controller = TextEditingController(
-      text: 'one two three',
-    );
-    late StateSetter setState;
-    await tester.pumpWidget(
-      Builder(
-        builder: (BuildContext context) {
-          final MediaQueryData mediaQueryData = MediaQuery.of(context);
-          return MediaQuery(
-            data: mediaQueryData.copyWith(
-              supportsShowingSystemContextMenu: true,
-            ),
-            child: MaterialApp(
-              home: Scaffold(
-                body: Center(
-                  child: StatefulBuilder(
-                    builder: (BuildContext context, StateSetter localSetState) {
-                      setState = localSetState;
-                      return TextField(
-                        controller: controller,
-                        contextMenuBuilder: (BuildContext context, EditableTextState editableTextState) {
-                          return SystemContextMenu.editableText(
-                            editableTextState: editableTextState,
-                          );
-                        },
-                      );
-                    },
-                  ),
-                ),
-              ),
-            ),
-          );
-        },
-      ),
-    );
-
-    await tester.tap(find.byType(TextField));
-    final EditableTextState state = tester.state<EditableTextState>(find.byType(EditableText));
-    expect(state.showToolbar(), true);
-    await tester.pump();
-
-    setState(() {});
-    await tester.pumpAndSettle();
-
-    expect(tester.takeException(), isNull);
-  }, variant: TargetPlatformVariant.only(TargetPlatform.iOS));
-
-  testWidgets('can handle multiple instances', (WidgetTester tester) async {
-    final TextEditingController controller1 = TextEditingController(
-      text: 'one two three',
-    );
-    final TextEditingController controller2 = TextEditingController(
-      text: 'four five six',
-    );
-    final GlobalKey field1Key = GlobalKey();
-    final GlobalKey field2Key = GlobalKey();
-    final GlobalKey menu1Key = GlobalKey();
-    final GlobalKey menu2Key = GlobalKey();
-    await tester.pumpWidget(
-      Builder(
-        builder: (BuildContext context) {
-          final MediaQueryData mediaQueryData = MediaQuery.of(context);
-          return MediaQuery(
-            data: mediaQueryData.copyWith(
-              supportsShowingSystemContextMenu: true,
-            ),
-            child: MaterialApp(
-              home: Scaffold(
-                body: Center(
-                  child: Column(
-                    children: <Widget>[
-                      TextField(
-                        key: field1Key,
-                        controller: controller1,
-                        contextMenuBuilder: (BuildContext context, EditableTextState editableTextState) {
-                          return SystemContextMenu.editableText(
-                            key: menu1Key,
-                            editableTextState: editableTextState,
-                          );
-                        },
-                      ),
-                      TextField(
-                        key: field2Key,
-                        controller: controller2,
-                        contextMenuBuilder: (BuildContext context, EditableTextState editableTextState) {
-                          return SystemContextMenu.editableText(
-                            key: menu2Key,
-                            editableTextState: editableTextState,
-                          );
-                        },
-                      ),
-                    ],
-                  ),
-                ),
-              ),
-            ),
-          );
-        },
-      ),
-    );
-
-    expect(find.byType(SystemContextMenu), findsNothing);
-
-    await tester.tap(find.byKey(field1Key));
-    final EditableTextState state1 = tester.state<EditableTextState>(
-      find.descendant(
-        of: find.byKey(field1Key),
-        matching: find.byType(EditableText),
-      ),
-    );
-    expect(state1.showToolbar(), true);
-    await tester.pump();
-    expect(find.byKey(menu1Key), findsOneWidget);
-    expect(find.byKey(menu2Key), findsNothing);
-
-    // In a real app, this message is sent by iOS when the user taps anywhere
-    // outside of the system context menu.
-    final ByteData? messageBytes = const JSONMessageCodec().encodeMessage(<String, dynamic>{
-      'method': 'ContextMenu.onDismissSystemContextMenu',
-    });
-    await binding.defaultBinaryMessenger.handlePlatformMessage(
-      'flutter/platform',
-      messageBytes,
-      (ByteData? data) {},
-    );
-    await tester.pump();
-    expect(find.byType(SystemContextMenu), findsNothing);
-
-    await tester.tap(find.byKey(field2Key));
-    final EditableTextState state2 = tester.state<EditableTextState>(
-      find.descendant(
-        of: find.byKey(field2Key),
-        matching: find.byType(EditableText),
-      ),
-    );
-    expect(state2.showToolbar(), true);
-    await tester.pump();
-    expect(find.byKey(menu1Key), findsNothing);
-    expect(find.byKey(menu2Key), findsOneWidget);
-  }, variant: TargetPlatformVariant.only(TargetPlatform.iOS));
-
-  testWidgets('asserts when built with no text input connection', (WidgetTester tester) async {
-    SystemContextMenu? systemContextMenu;
-    late StateSetter setState;
-    await tester.pumpWidget(
-      Builder(
-        builder: (BuildContext context) {
-          final MediaQueryData mediaQueryData = MediaQuery.of(context);
-          return MediaQuery(
-            data: mediaQueryData.copyWith(
-              supportsShowingSystemContextMenu: true,
-            ),
-            child: MaterialApp(
-              home: Scaffold(
-                body: StatefulBuilder(
-                  builder: (BuildContext context, StateSetter localSetState) {
-                    setState = localSetState;
-                    return Column(
-                      children: <Widget>[
-                        const TextField(),
-                        if (systemContextMenu != null)
-                          systemContextMenu!,
-                      ],
-                    );
-                  },
-                ),
-              ),
-            ),
-          );
-        },
-      ),
-    );
-
-    // No SystemContextMenu yet, so no assertion error.
-    expect(tester.takeException(), isNull);
-
-    // Add the SystemContextMenu and receive an assertion since there is no
-    // active text input connection.
-    setState(() {
-      final EditableTextState state = tester.state<EditableTextState>(find.byType(EditableText));
-      systemContextMenu = SystemContextMenu.editableText(
-        editableTextState: state,
-      );
-    });
-
-    final FlutterExceptionHandler? oldHandler = FlutterError.onError;
-    dynamic exception;
-    FlutterError.onError = (FlutterErrorDetails details) {
-      exception ??= details.exception;
-    };
-    addTearDown(() {
-      FlutterError.onError = oldHandler;
-    });
-
-    await tester.pump();
-    expect(exception, isAssertionError);
-    expect(exception.toString(), contains('only be shown for an active text input connection'));
-  }, variant: TargetPlatformVariant.only(TargetPlatform.iOS));
-
-  testWidgets('does not assert when built with an active text input connection', (WidgetTester tester) async {
-    SystemContextMenu? systemContextMenu;
-    late StateSetter setState;
-    await tester.pumpWidget(
-      Builder(
-        builder: (BuildContext context) {
-          final MediaQueryData mediaQueryData = MediaQuery.of(context);
-          return MediaQuery(
-            data: mediaQueryData.copyWith(
-              supportsShowingSystemContextMenu: true,
-            ),
-            child: MaterialApp(
-              home: Scaffold(
-                body: StatefulBuilder(
-                  builder: (BuildContext context, StateSetter localSetState) {
-                    setState = localSetState;
-                    return Column(
-                      children: <Widget>[
-                        const TextField(),
-                        if (systemContextMenu != null)
-                          systemContextMenu!,
-                      ],
-                    );
-                  },
-                ),
-              ),
-            ),
-          );
-        },
-      ),
-    );
-
-    // No SystemContextMenu yet, so no assertion error.
-    expect(tester.takeException(), isNull);
-
-    // Tap the field to open a text input connection.
-    await tester.tap(find.byType(TextField));
-    await tester.pump();
-
-    // Add the SystemContextMenu and expect no error.
-    setState(() {
-      final EditableTextState state = tester.state<EditableTextState>(find.byType(EditableText));
-      systemContextMenu = SystemContextMenu.editableText(
-        editableTextState: state,
-      );
-    });
-
-    final FlutterExceptionHandler? oldHandler = FlutterError.onError;
-    dynamic exception;
-    FlutterError.onError = (FlutterErrorDetails details) {
-      exception ??= details.exception;
-    };
-    addTearDown(() {
-      FlutterError.onError = oldHandler;
-    });
-
-    await tester.pump();
-    expect(exception, isNull);
-  }, variant: TargetPlatformVariant.only(TargetPlatform.iOS));
-}

packages/flutter_test/lib/src/window.dart

@@ -307,18 +307,6 @@ class TestPlatformDispatcher implements PlatformDispatcher {
     _nativeSpellCheckServiceDefinedTestValue = null;
   }
 
-  @override
-  bool get supportsShowingSystemContextMenu => _supportsShowingSystemContextMenu ?? _platformDispatcher.supportsShowingSystemContextMenu;
-  bool? _supportsShowingSystemContextMenu;
-  set supportsShowingSystemContextMenu(bool value) { // ignore: avoid_setters_without_getters
-    _supportsShowingSystemContextMenu = value;
-  }
-
-  /// Resets [supportsShowingSystemContextMenu] to the default value.
-  void resetSupportsShowingSystemContextMenu() {
-    _supportsShowingSystemContextMenu = null;
-  }
-
   @override
   bool get brieflyShowPassword => _brieflyShowPasswordTestValue ?? _platformDispatcher.brieflyShowPassword;
   bool? _brieflyShowPasswordTestValue;
@@ -470,7 +458,6 @@ class TestPlatformDispatcher implements PlatformDispatcher {
     clearTextScaleFactorTestValue();
     clearNativeSpellCheckServiceDefined();
     resetBrieflyShowPassword();
-    resetSupportsShowingSystemContextMenu();
     resetInitialLifecycleState();
     resetSystemFontFamily();
   }