Material Desktop Context Menu (#74286)

Very simple right-click context menu for Windows and Linux in a Material-esque style.

packages/flutter/lib/material.dart

@@ -57,6 +57,7 @@ export 'src/material/date.dart';
 export 'src/material/date_picker.dart';
 export 'src/material/date_picker_deprecated.dart';
 export 'src/material/debug.dart';
+export 'src/material/desktop_text_selection.dart';
 export 'src/material/dialog.dart';
 export 'src/material/dialog_theme.dart';
 export 'src/material/divider.dart';

packages/flutter/lib/src/cupertino/desktop_text_selection.dart

@@ -307,7 +307,7 @@ class _CupertinoDesktopTextSelectionToolbar extends StatelessWidget {
         _kToolbarScreenPadding,
       ),
       child: CustomSingleChildLayout(
-        delegate: _DesktopTextSelectionToolbarLayoutDelegate(
+        delegate: DesktopTextSelectionToolbarLayoutDelegate(
           anchor: anchor - localAdjustment,
         ),
         child: toolbarBuilder(context, Column(
@@ -319,48 +319,6 @@ class _CupertinoDesktopTextSelectionToolbar extends StatelessWidget {
   }
 }
 
-// Positions the toolbar at [anchor] if it fits, otherwise moves it so that it
-// just fits fully on-screen.
-//
-// See also:
-//
-//   * [CupertinoDesktopTextSelectionToolbar], which uses this to position itself.
-//   * [TextSelectionToolbarLayoutDelegate], which does a similar layout for
-//     the mobile text selection toolbars.
-class _DesktopTextSelectionToolbarLayoutDelegate extends SingleChildLayoutDelegate {
-  /// Creates an instance of TextSelectionToolbarLayoutDelegate.
-  _DesktopTextSelectionToolbarLayoutDelegate({
-    required this.anchor,
-  });
-
-  /// The point at which to render the menu, if possible.
-  ///
-  /// Should be provided in local coordinates.
-  final Offset anchor;
-
-  @override
-  BoxConstraints getConstraintsForChild(BoxConstraints constraints) {
-    return constraints.loosen();
-  }
-
-  @override
-  Offset getPositionForChild(Size size, Size childSize) {
-    final Offset overhang = Offset(
-      anchor.dx + childSize.width - size.width,
-      anchor.dy + childSize.height - size.height,
-    );
-    return Offset(
-      overhang.dx > 0.0 ? anchor.dx - overhang.dx : anchor.dx,
-      overhang.dy > 0.0 ? anchor.dy - overhang.dy : anchor.dy,
-    );
-  }
-
-  @override
-  bool shouldRelayout(_DesktopTextSelectionToolbarLayoutDelegate oldDelegate) {
-    return anchor != oldDelegate.anchor;
-  }
-}
-
 // These values were measured from a screenshot of TextEdit on MacOS 10.15.7 on
 // a Macbook Pro.
 const TextStyle _kToolbarButtonFontStyle = TextStyle(

packages/flutter/lib/src/material/desktop_text_selection.dart

@@ -0,0 +1,372 @@
+// 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/gestures.dart';
+import 'package:flutter/rendering.dart';
+import 'package:flutter/services.dart';
+import 'package:flutter/widgets.dart';
+
+import 'colors.dart';
+import 'constants.dart';
+import 'debug.dart';
+import 'material.dart';
+import 'material_localizations.dart';
+import 'text_button.dart';
+import 'text_selection_toolbar.dart';
+import 'theme.dart';
+
+const double _kToolbarScreenPadding = 8.0;
+const double _kToolbarWidth = 222.0;
+
+class _DesktopTextSelectionControls extends TextSelectionControls {
+  /// Desktop has no text selection handles.
+  @override
+  Size getHandleSize(double textLineHeight) {
+    return Size.zero;
+  }
+
+  /// Builder for the Material-style desktop copy/paste text selection toolbar.
+  @override
+  Widget buildToolbar(
+    BuildContext context,
+    Rect globalEditableRegion,
+    double textLineHeight,
+    Offset selectionMidpoint,
+    List<TextSelectionPoint> endpoints,
+    TextSelectionDelegate delegate,
+    ClipboardStatusNotifier clipboardStatus,
+    Offset? lastSecondaryTapDownPosition,
+  ) {
+    return _DesktopTextSelectionControlsToolbar(
+      clipboardStatus: clipboardStatus,
+      endpoints: endpoints,
+      globalEditableRegion: globalEditableRegion,
+      handleCut: canCut(delegate) ? () => handleCut(delegate) : null,
+      handleCopy: canCopy(delegate) ? () => handleCopy(delegate, clipboardStatus) : null,
+      handlePaste: canPaste(delegate) ? () => handlePaste(delegate) : null,
+      handleSelectAll: canSelectAll(delegate) ? () => handleSelectAll(delegate) : null,
+      selectionMidpoint: selectionMidpoint,
+      lastSecondaryTapDownPosition: lastSecondaryTapDownPosition,
+      textLineHeight: textLineHeight,
+    );
+  }
+
+  /// Builds the text selection handles, but desktop has none.
+  @override
+  Widget buildHandle(BuildContext context, TextSelectionHandleType type, double textLineHeight) {
+    return const SizedBox.shrink();
+  }
+
+  /// Gets the position for the text selection handles, but desktop has none.
+  @override
+  Offset getHandleAnchor(TextSelectionHandleType type, double textLineHeight) {
+    return Offset.zero;
+  }
+
+  @override
+  bool canSelectAll(TextSelectionDelegate delegate) {
+    // Allow SelectAll when selection is not collapsed, unless everything has
+    // already been selected. Same behavior as Android.
+    final TextEditingValue value = delegate.textEditingValue;
+    return delegate.selectAllEnabled &&
+           value.text.isNotEmpty &&
+           !(value.selection.start == 0 && value.selection.end == value.text.length);
+  }
+}
+
+/// Text selection controls that loosely follows Material design conventions.
+final TextSelectionControls desktopTextSelectionControls =
+    _DesktopTextSelectionControls();
+
+// Generates the child that's passed into DesktopTextSelectionToolbar.
+class _DesktopTextSelectionControlsToolbar extends StatefulWidget {
+  const _DesktopTextSelectionControlsToolbar({
+    Key? key,
+    required this.clipboardStatus,
+    required this.endpoints,
+    required this.globalEditableRegion,
+    required this.handleCopy,
+    required this.handleCut,
+    required this.handlePaste,
+    required this.handleSelectAll,
+    required this.selectionMidpoint,
+    required this.textLineHeight,
+    required this.lastSecondaryTapDownPosition,
+  }) : super(key: key);
+
+  final ClipboardStatusNotifier? clipboardStatus;
+  final List<TextSelectionPoint> endpoints;
+  final Rect globalEditableRegion;
+  final VoidCallback? handleCopy;
+  final VoidCallback? handleCut;
+  final VoidCallback? handlePaste;
+  final VoidCallback? handleSelectAll;
+  final Offset? lastSecondaryTapDownPosition;
+  final Offset selectionMidpoint;
+  final double textLineHeight;
+
+  @override
+  _DesktopTextSelectionControlsToolbarState createState() => _DesktopTextSelectionControlsToolbarState();
+}
+
+class _DesktopTextSelectionControlsToolbarState extends State<_DesktopTextSelectionControlsToolbar> {
+  ClipboardStatusNotifier? _clipboardStatus;
+
+  void _onChangedClipboardStatus() {
+    setState(() {
+      // Inform the widget that the value of clipboardStatus has changed.
+    });
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    if (widget.handlePaste != null) {
+      _clipboardStatus = widget.clipboardStatus ?? ClipboardStatusNotifier();
+      _clipboardStatus!.addListener(_onChangedClipboardStatus);
+      _clipboardStatus!.update();
+    }
+  }
+
+  @override
+  void didUpdateWidget(_DesktopTextSelectionControlsToolbar oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.clipboardStatus != widget.clipboardStatus) {
+      if (_clipboardStatus != null) {
+        _clipboardStatus!.removeListener(_onChangedClipboardStatus);
+        _clipboardStatus!.dispose();
+      }
+      _clipboardStatus = widget.clipboardStatus ?? ClipboardStatusNotifier();
+      _clipboardStatus!.addListener(_onChangedClipboardStatus);
+      if (widget.handlePaste != null) {
+        _clipboardStatus!.update();
+      }
+    }
+  }
+
+  @override
+  void dispose() {
+    super.dispose();
+    // When used in an Overlay, this can be disposed after its creator has
+    // already disposed _clipboardStatus.
+    if (_clipboardStatus != null && !_clipboardStatus!.disposed) {
+      _clipboardStatus!.removeListener(_onChangedClipboardStatus);
+      if (widget.clipboardStatus == null) {
+        _clipboardStatus!.dispose();
+      }
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    // Don't render the menu until the state of the clipboard is known.
+    if (widget.handlePaste != null && _clipboardStatus!.value == ClipboardStatus.unknown) {
+      return const SizedBox(width: 0.0, height: 0.0);
+    }
+
+    assert(debugCheckHasMediaQuery(context));
+    final MediaQueryData mediaQuery = MediaQuery.of(context);
+
+    final Offset midpointAnchor = Offset(
+      (widget.selectionMidpoint.dx - widget.globalEditableRegion.left).clamp(
+        mediaQuery.padding.left,
+        mediaQuery.size.width - mediaQuery.padding.right,
+      ),
+      widget.selectionMidpoint.dy - widget.globalEditableRegion.top,
+    );
+
+    assert(debugCheckHasMaterialLocalizations(context));
+    final MaterialLocalizations localizations = MaterialLocalizations.of(context);
+    final List<Widget> items = <Widget>[];
+
+    void addToolbarButton(
+      String text,
+      VoidCallback onPressed,
+    ) {
+      items.add(_DesktopTextSelectionToolbarButton.text(
+        context: context,
+        onPressed: onPressed,
+        text: text,
+      ));
+    }
+
+    if (widget.handleCut != null) {
+      addToolbarButton(localizations.cutButtonLabel, widget.handleCut!);
+    }
+    if (widget.handleCopy != null) {
+      addToolbarButton(localizations.copyButtonLabel, widget.handleCopy!);
+    }
+    if (widget.handlePaste != null
+        && _clipboardStatus!.value == ClipboardStatus.pasteable) {
+      addToolbarButton(localizations.pasteButtonLabel, widget.handlePaste!);
+    }
+    if (widget.handleSelectAll != null) {
+      addToolbarButton(localizations.selectAllButtonLabel, widget.handleSelectAll!);
+    }
+
+    // If there is no option available, build an empty widget.
+    if (items.isEmpty) {
+      return const SizedBox(width: 0.0, height: 0.0);
+    }
+
+    return _DesktopTextSelectionToolbar(
+      anchor: widget.lastSecondaryTapDownPosition ?? midpointAnchor,
+      children: items,
+    );
+  }
+}
+
+/// A Material-style desktop text selection toolbar.
+///
+/// Typically displays buttons for text manipulation, e.g. copying and pasting
+/// text.
+///
+/// Tries to position itself as closesly as possible to [anchor] while remaining
+/// fully on-screen.
+///
+/// See also:
+///
+///  * [_DesktopTextSelectionControls.buildToolbar], where this is used by
+///    default to build a Material-style desktop toolbar.
+///  * [TextSelectionToolbar], which is similar, but builds an Android-style
+///    toolbar.
+class _DesktopTextSelectionToolbar extends StatelessWidget {
+  /// Creates an instance of _DesktopTextSelectionToolbar.
+  const _DesktopTextSelectionToolbar({
+    Key? key,
+    required this.anchor,
+    required this.children,
+    this.toolbarBuilder = _defaultToolbarBuilder,
+  }) : assert(children.length > 0),
+       super(key: key);
+
+  /// The point at which the toolbar will attempt to position itself as closely
+  /// as possible.
+  final Offset anchor;
+
+  /// {@macro flutter.material.TextSelectionToolbar.children}
+  ///
+  /// See also:
+  ///   * [DesktopTextSelectionToolbarButton], which builds a default
+  ///     Material-style desktop text selection toolbar text button.
+  final List<Widget> children;
+
+  /// {@macro flutter.material.TextSelectionToolbar.toolbarBuilder}
+  ///
+  /// The given anchor and isAbove can be used to position an arrow, as in the
+  /// default toolbar.
+  final ToolbarBuilder toolbarBuilder;
+
+  // Builds a desktop toolbar in the Material style.
+  static Widget _defaultToolbarBuilder(BuildContext context, Widget child) {
+    return SizedBox(
+      width: _kToolbarWidth,
+      child: Material(
+        borderRadius: const BorderRadius.all(Radius.circular(7.0)),
+        clipBehavior: Clip.antiAlias,
+        elevation: 1.0,
+        type: MaterialType.card,
+        child: child,
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    assert(debugCheckHasMediaQuery(context));
+    final MediaQueryData mediaQuery = MediaQuery.of(context);
+
+    final double paddingAbove = mediaQuery.padding.top + _kToolbarScreenPadding;
+    final Offset localAdjustment = Offset(_kToolbarScreenPadding, paddingAbove);
+
+    return Padding(
+      padding: EdgeInsets.fromLTRB(
+        _kToolbarScreenPadding,
+        paddingAbove,
+        _kToolbarScreenPadding,
+        _kToolbarScreenPadding,
+      ),
+      child: CustomSingleChildLayout(
+        delegate: DesktopTextSelectionToolbarLayoutDelegate(
+          anchor: anchor - localAdjustment,
+        ),
+        child: toolbarBuilder(context, Column(
+          mainAxisSize: MainAxisSize.min,
+          children: children,
+        )),
+      ),
+    );
+  }
+}
+
+const TextStyle _kToolbarButtonFontStyle = TextStyle(
+  inherit: false,
+  fontSize: 14.0,
+  letterSpacing: -0.15,
+  fontWeight: FontWeight.w400,
+);
+
+const EdgeInsets _kToolbarButtonPadding = EdgeInsets.fromLTRB(
+  20.0,
+  0.0,
+  20.0,
+  3.0,
+);
+
+/// A [TextButton] for the Material desktop text selection toolbar.
+class _DesktopTextSelectionToolbarButton extends StatelessWidget {
+  /// Creates an instance of DesktopTextSelectionToolbarButton.
+  const _DesktopTextSelectionToolbarButton({
+    Key? key,
+    required this.onPressed,
+    required this.child,
+  }) : super(key: key);
+
+  /// Create an instance of [_DesktopTextSelectionToolbarButton] whose child is
+  /// a [Text] widget in the style of the Material text selection toolbar.
+  _DesktopTextSelectionToolbarButton.text({
+    Key? key,
+    required BuildContext context,
+    required this.onPressed,
+    required String text,
+  }) : child = Text(
+         text,
+         overflow: TextOverflow.ellipsis,
+         style: _kToolbarButtonFontStyle.copyWith(
+           color: Theme.of(context).colorScheme.brightness == Brightness.dark
+               ? Colors.white
+               : Colors.black87,
+         ),
+       ),
+       super(key: key);
+
+  /// {@macro flutter.material.TextSelectionToolbarTextButton.onPressed}
+  final VoidCallback onPressed;
+
+  /// {@macro flutter.material.TextSelectionToolbarTextButton.child}
+  final Widget child;
+
+  @override
+  Widget build(BuildContext context) {
+    // TODO(hansmuller): Should be colorScheme.onSurface
+    final ThemeData theme = Theme.of(context);
+    final bool isDark = theme.colorScheme.brightness == Brightness.dark;
+    final Color primary = isDark ? Colors.white : Colors.black87;
+
+    return SizedBox(
+      width: double.infinity,
+      child: TextButton(
+        style: TextButton.styleFrom(
+          alignment: Alignment.centerLeft,
+          primary: primary,
+          shape: const RoundedRectangleBorder(),
+          minimumSize: const Size(kMinInteractiveDimension, 36.0),
+          padding: _kToolbarButtonPadding,
+        ),
+        onPressed: onPressed,
+        child: child,
+      ),
+    );
+  }
+}

packages/flutter/lib/src/material/selectable_text.dart

@@ -9,6 +9,7 @@ import 'package:flutter/widgets.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
 
+import 'desktop_text_selection.dart';
 import 'feedback.dart';
 import 'text_selection.dart';
 import 'text_selection_theme.dart';
@@ -606,10 +607,18 @@ class _SelectableTextState extends State<SelectableText> with AutomaticKeepAlive
 
       case TargetPlatform.android:
       case TargetPlatform.fuchsia:
+        forcePressEnabled = false;
+        textSelectionControls ??= materialTextSelectionControls;
+        paintCursorAboveText = false;
+        cursorOpacityAnimates = false;
+        cursorColor ??= selectionTheme.cursorColor ?? theme.colorScheme.primary;
+        selectionColor = selectionTheme.selectionColor ?? theme.colorScheme.primary.withOpacity(0.40);
+        break;
+
       case TargetPlatform.linux:
       case TargetPlatform.windows:
         forcePressEnabled = false;
-        textSelectionControls ??= materialTextSelectionControls;
+        textSelectionControls ??= desktopTextSelectionControls;
         paintCursorAboveText = false;
         cursorOpacityAnimates = false;
         cursorColor ??= selectionTheme.cursorColor ?? theme.colorScheme.primary;

packages/flutter/lib/src/material/text_field.dart

@@ -13,6 +13,7 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
 
 import 'debug.dart';
+import 'desktop_text_selection.dart';
 import 'feedback.dart';
 import 'input_decorator.dart';
 import 'material.dart';
@@ -1169,10 +1170,18 @@ class _TextFieldState extends State<TextField> with RestorationMixin implements
 
       case TargetPlatform.android:
       case TargetPlatform.fuchsia:
+        forcePressEnabled = false;
+        textSelectionControls ??= materialTextSelectionControls;
+        paintCursorAboveText = false;
+        cursorOpacityAnimates = false;
+        cursorColor ??= selectionTheme.cursorColor ?? theme.colorScheme.primary;
+        selectionColor = selectionTheme.selectionColor ?? theme.colorScheme.primary.withOpacity(0.40);
+        break;
+
       case TargetPlatform.linux:
       case TargetPlatform.windows:
         forcePressEnabled = false;
-        textSelectionControls ??= materialTextSelectionControls;
+        textSelectionControls ??= desktopTextSelectionControls;
         paintCursorAboveText = false;
         cursorOpacityAnimates = false;
         cursorColor ??= selectionTheme.cursorColor ?? theme.colorScheme.primary;

packages/flutter/lib/src/material/text_selection_toolbar_text_button.dart

@@ -38,12 +38,16 @@ class TextSelectionToolbarTextButton extends StatelessWidget {
   static const double _kMiddlePadding = 9.5;
   static const double _kEndPadding = 14.5;
 
+  /// {@template flutter.material.TextSelectionToolbarTextButton.child}
   /// The child of this button.
   ///
   /// Usually a [Text].
+  /// {@endtemplate}
   final Widget child;
 
+  /// {@template flutter.material.TextSelectionToolbarTextButton.onPressed}
   /// Called when this button is pressed.
+  /// {@endtemplate}
   final VoidCallback? onPressed;
 
   /// The padding between the button's edge and its child.

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

@@ -0,0 +1,51 @@
+// 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';
+
+
+/// Positions the toolbar at [anchor] if it fits, otherwise moves it so that it
+/// just fits fully on-screen.
+///
+/// See also:
+///
+///   * [desktopTextSelectionControls], which uses this to position
+///     itself.
+///   * [cupertinoDesktopTextSelectionControls], which uses this to position
+///     itself.
+///   * [TextSelectionToolbarLayoutDelegate], which does a similar layout for
+///     the mobile text selection toolbars.
+class DesktopTextSelectionToolbarLayoutDelegate extends SingleChildLayoutDelegate {
+  /// Creates an instance of TextSelectionToolbarLayoutDelegate.
+  DesktopTextSelectionToolbarLayoutDelegate({
+    required this.anchor,
+  });
+
+  /// The point at which to render the menu, if possible.
+  ///
+  /// Should be provided in local coordinates.
+  final Offset anchor;
+
+  @override
+  BoxConstraints getConstraintsForChild(BoxConstraints constraints) {
+    return constraints.loosen();
+  }
+
+  @override
+  Offset getPositionForChild(Size size, Size childSize) {
+    final Offset overhang = Offset(
+      anchor.dx + childSize.width - size.width,
+      anchor.dy + childSize.height - size.height,
+    );
+    return Offset(
+      overhang.dx > 0.0 ? anchor.dx - overhang.dx : anchor.dx,
+      overhang.dy > 0.0 ? anchor.dy - overhang.dy : anchor.dy,
+    );
+  }
+
+  @override
+  bool shouldRelayout(DesktopTextSelectionToolbarLayoutDelegate oldDelegate) {
+    return anchor != oldDelegate.anchor;
+  }
+}

packages/flutter/lib/widgets.dart

@@ -33,6 +33,7 @@ export 'src/widgets/bottom_navigation_bar_item.dart';
 export 'src/widgets/color_filter.dart';
 export 'src/widgets/container.dart';
 export 'src/widgets/debug.dart';
+export 'src/widgets/desktop_text_selection_toolbar_layout_delegate.dart';
 export 'src/widgets/dismissible.dart';
 export 'src/widgets/disposable_build_context.dart';
 export 'src/widgets/drag_target.dart';

packages/flutter/test/material/text_field_test.dart

@@ -238,7 +238,7 @@ void main() {
     expect(controller.text, ' blah2blah1');
     expect(controller.selection, const TextSelection(baseOffset: 0, extentOffset: 0));
     expect(find.byType(CupertinoButton), findsNothing);
-  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.macOS }), skip: kIsWeb);
+  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.macOS, TargetPlatform.windows, TargetPlatform.linux }), skip: kIsWeb);
 
   testWidgets('TextField passes onEditingComplete to EditableText', (WidgetTester tester) async {
     final VoidCallback onEditingComplete = () { };
@@ -7296,7 +7296,7 @@ void main() {
       );
       // The text selection toolbar isn't shown on Mac without a right click.
       expect(find.byType(CupertinoButton), findsNothing);
-  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.macOS }), skip: kIsWeb);
+  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.macOS, TargetPlatform.windows, TargetPlatform.linux }), skip: kIsWeb);
 
   testWidgets('double tap chains work', (WidgetTester tester) async {
       final TextEditingController controller = TextEditingController(
@@ -7445,7 +7445,7 @@ void main() {
         const TextSelection(baseOffset: 8, extentOffset: 12),
       );
       expect(find.byType(CupertinoButton), findsNothing);
-  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.macOS }), skip: kIsWeb);
+  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.macOS, TargetPlatform.windows, TargetPlatform.linux }), skip: kIsWeb);
 
   testWidgets('double tapping a space selects the previous word on iOS', (WidgetTester tester) async {
     final TextEditingController controller = TextEditingController(
@@ -7639,7 +7639,7 @@ void main() {
     expect(controller.value.selection, isNotNull);
     expect(controller.value.selection.baseOffset, 0);
     expect(controller.value.selection.extentOffset, 1);
-  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.macOS }));
+  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.macOS, TargetPlatform.windows, TargetPlatform.linux }), skip: kIsWeb);
 
   testWidgets('force press does not select a word', (WidgetTester tester) async {
     final TextEditingController controller = TextEditingController(

packages/flutter/test/material/text_form_field_test.dart

@@ -112,7 +112,7 @@ void main() {
     expect(controller.text, ' blah2blah1');
     expect(controller.selection, const TextSelection(baseOffset: 0, extentOffset: 0));
     expect(find.byType(CupertinoButton), findsNothing);
-  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.macOS }), skip: kIsWeb);
+  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.macOS, TargetPlatform.windows, TargetPlatform.linux }), skip: kIsWeb);
 
   testWidgets('Passes textAlign to underlying TextField', (WidgetTester tester) async {
     const TextAlign alignment = TextAlign.center;

packages/flutter/test/widgets/selectable_text_test.dart

@@ -255,7 +255,7 @@ void main() {
     expect(controller.text, ' blah2blah1');
     expect(controller.selection, const TextSelection(baseOffset: 0, extentOffset: 0));
     expect(find.byType(CupertinoButton), findsNothing);
-  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.macOS }), skip: kIsWeb);
+  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.macOS, TargetPlatform.windows, TargetPlatform.linux }), skip: kIsWeb);
 
   testWidgets('has expected defaults', (WidgetTester tester) async {
     await tester.pumpWidget(
@@ -4329,8 +4329,6 @@ void main() {
     variant: const TargetPlatformVariant(<TargetPlatform>{
       TargetPlatform.android,
       TargetPlatform.fuchsia,
-      TargetPlatform.linux,
-      TargetPlatform.windows,
     }),
   );
 
@@ -4367,8 +4365,49 @@ void main() {
     variant: const TargetPlatformVariant(<TargetPlatform>{
       TargetPlatform.android,
       TargetPlatform.fuchsia,
-      TargetPlatform.linux,
+    }),
+  );
+
+  testWidgets('The Select All calls on selection changed with a mouse on windows and linux', (WidgetTester tester) async {
+    const String string = 'abc def ghi';
+    TextSelection? newSelection;
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Material(
+          child: SelectableText(
+            string,
+            onSelectionChanged: (TextSelection selection, SelectionChangedCause? cause) {
+              expect(newSelection, isNull);
+              newSelection = selection;
+            },
+          ),
+        ),
+      ),
+    );
+
+    // Right-click on the 'e' in 'def'.
+    final Offset ePos = textOffsetToPosition(tester, 5);
+    final TestGesture gesture = await tester.startGesture(
+      ePos,
+      kind: PointerDeviceKind.mouse,
+      buttons: kSecondaryMouseButton,
+    );
+    addTearDown(gesture.removePointer);
+    await tester.pump();
+    await gesture.up();
+    await tester.pumpAndSettle();
+    expect(newSelection!.baseOffset, 4);
+    expect(newSelection!.extentOffset, 7);
+    newSelection = null;
+
+    await tester.tap(find.text('Select all'));
+    await tester.pump();
+    expect(newSelection!.baseOffset, 0);
+    expect(newSelection!.extentOffset, 11);
+  },
+    variant: const TargetPlatformVariant(<TargetPlatform>{
       TargetPlatform.windows,
+      TargetPlatform.linux,
     }),
   );