Mouse drag should not show selection handles (#69101)

Fixes a bug where selection handles sometimes showed on web.

packages/flutter/lib/src/gestures/drag_details.dart

@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 
-import 'dart:ui' show Offset;
+import 'dart:ui' show Offset, PointerDeviceKind;
 
 import 'package:flutter/foundation.dart';
 
@@ -71,6 +71,7 @@ class DragStartDetails {
     this.sourceTimeStamp,
     this.globalPosition = Offset.zero,
     Offset? localPosition,
+    this.kind,
   }) : assert(globalPosition != null),
        localPosition = localPosition ?? globalPosition;
 
@@ -96,6 +97,9 @@ class DragStartDetails {
   /// Defaults to [globalPosition] if not specified in the constructor.
   final Offset localPosition;
 
+  /// The kind of the device that initiated the event.
+  final PointerDeviceKind? kind;
+
   // TODO(ianh): Expose the current position, so that you can have a no-jump
   // drag even when disambiguating (though of course it would lag the finger
   // instead).

packages/flutter/lib/src/gestures/monodrag.dart

@@ -336,7 +336,7 @@ abstract class DragGestureRecognizer extends OneSequenceGestureRecognizer {
       _pendingDragOffset = OffsetPair.zero;
       _lastPendingEventTimestamp = null;
       _lastTransform = null;
-      _checkStart(timestamp);
+      _checkStart(timestamp, pointer);
       if (localUpdateDelta != Offset.zero && onUpdate != null) {
         final Matrix4? localToGlobal = transform != null ? Matrix4.tryInvert(transform) : null;
         final Offset correctedLocalPosition = _initialPosition.local + localUpdateDelta;
@@ -404,12 +404,13 @@ abstract class DragGestureRecognizer extends OneSequenceGestureRecognizer {
       invokeCallback<void>('onDown', () => onDown!(details));
   }
 
-  void _checkStart(Duration timestamp) {
+  void _checkStart(Duration timestamp, int pointer) {
     assert(_initialButtons == kPrimaryButton);
     final DragStartDetails details = DragStartDetails(
       sourceTimeStamp: timestamp,
       globalPosition: _initialPosition.global,
       localPosition: _initialPosition.local,
+      kind: getKindForPointer(pointer),
     );
     if (onStart != null)
       invokeCallback<void>('onStart', () => onStart!(details));

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

@@ -922,8 +922,8 @@ class TextSelectionGestureDetectorBuilder {
     // For backwards-compatibility, we treat a null kind the same as touch.
     final PointerDeviceKind? kind = details.kind;
     _shouldShowSelectionToolbar = kind == null
-                              || kind == PointerDeviceKind.touch
-                              || kind == PointerDeviceKind.stylus;
+      || kind == PointerDeviceKind.touch
+      || kind == PointerDeviceKind.stylus;
   }
 
   /// Handler for [TextSelectionGestureDetector.onForcePressStart].
@@ -1077,6 +1077,11 @@ class TextSelectionGestureDetectorBuilder {
   ///    this callback.
   @protected
   void onDragSelectionStart(DragStartDetails details) {
+    final PointerDeviceKind? kind = details.kind;
+    _shouldShowSelectionToolbar = kind == null
+      || kind == PointerDeviceKind.touch
+      || kind == PointerDeviceKind.stylus;
+
     renderEditable.selectPositionAt(
       from: details.globalPosition,
       cause: SelectionChangedCause.drag,

packages/flutter/test/widgets/text_selection_test.dart

@@ -557,6 +557,31 @@ void main() {
     expect(renderEditable.selectWordsInRangeCalled, isTrue);
   });
 
+  testWidgets('Mouse drag does not show handles nor toolbar', (WidgetTester tester) async {
+    // Regressing test for https://github.com/flutter/flutter/issues/69001
+    await tester.pumpWidget(
+      const MaterialApp(
+        home: Scaffold(
+          body: SelectableText('I love Flutter!'),
+        ),
+      ),
+    );
+
+    final Offset textFieldStart = tester.getTopLeft(find.byType(SelectableText));
+
+    final TestGesture gesture = await tester.startGesture(textFieldStart, kind: PointerDeviceKind.mouse);
+    addTearDown(gesture.removePointer);
+    await tester.pump();
+    await gesture.moveTo(textFieldStart + const Offset(50.0, 0));
+    await tester.pump();
+    await gesture.up();
+    await tester.pumpAndSettle();
+
+    final EditableTextState editableText = tester.state(find.byType(EditableText));
+    expect(editableText.selectionOverlay!.handlesAreVisible, isFalse);
+    expect(editableText.selectionOverlay!.toolbarIsVisible, isFalse);
+  });
+
   testWidgets('test TextSelectionGestureDetectorBuilder selection disabled', (WidgetTester tester) async {
     await pumpTextSelectionGestureDetectorBuilder(tester, selectionEnabled: false);
     final TestGesture gesture = await tester.startGesture(