Hide the context menu on tap down (#126295)

Desktop text selection toolbar no longer flashes before closing.

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

@@ -2108,10 +2108,13 @@ class TextSelectionGestureDetectorBuilder {
     switch (defaultTargetPlatform) {
       case TargetPlatform.android:
       case TargetPlatform.fuchsia:
+        // On mobile platforms the selection is set on tap up.
+        editableText.hideToolbar(false);
       case TargetPlatform.iOS:
         // On mobile platforms the selection is set on tap up.
         break;
       case TargetPlatform.macOS:
+        editableText.hideToolbar();
         // On macOS, a shift-tapped unfocused field expands from 0, not from the
         // previous selection.
         if (isShiftPressedValid) {
@@ -2132,6 +2135,7 @@ class TextSelectionGestureDetectorBuilder {
         renderEditable.selectPosition(cause: SelectionChangedCause.tap);
       case TargetPlatform.linux:
       case TargetPlatform.windows:
+        editableText.hideToolbar();
         if (isShiftPressedValid) {
           _extendSelection(details.globalPosition, SelectionChangedCause.tap);
           return;
@@ -2206,10 +2210,9 @@ class TextSelectionGestureDetectorBuilder {
         case TargetPlatform.linux:
         case TargetPlatform.macOS:
         case TargetPlatform.windows:
-          editableText.hideToolbar();
+          break;
           // On desktop platforms the selection is set on tap down.
         case TargetPlatform.android:
-          editableText.hideToolbar();
           if (isShiftPressedValid) {
             _extendSelection(details.globalPosition, SelectionChangedCause.tap);
             return;
@@ -2217,7 +2220,6 @@ class TextSelectionGestureDetectorBuilder {
           renderEditable.selectPosition(cause: SelectionChangedCause.tap);
           editableText.showSpellCheckSuggestionsToolbar();
         case TargetPlatform.fuchsia:
-          editableText.hideToolbar();
           if (isShiftPressedValid) {
             _extendSelection(details.globalPosition, SelectionChangedCause.tap);
             return;

packages/flutter/test/cupertino/text_field_test.dart

@@ -9513,4 +9513,49 @@ void main() {
     variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.iOS }),
     skip: kIsWeb, // [intended]
   );
+
+  testWidgets('text selection toolbar is hidden on tap down', (WidgetTester tester) async {
+    final TextEditingController controller = TextEditingController(
+      text: 'blah1 blah2',
+    );
+    await tester.pumpWidget(
+      CupertinoApp(
+        home: Center(
+          child: CupertinoTextField(
+            controller: controller,
+          ),
+        ),
+      ),
+    );
+
+    expect(find.byType(CupertinoAdaptiveTextSelectionToolbar), findsNothing);
+
+    TestGesture gesture = await tester.startGesture(
+      textOffsetToPosition(tester, 8),
+      kind: PointerDeviceKind.mouse,
+      buttons: kSecondaryMouseButton,
+    );
+    await tester.pump();
+    await gesture.up();
+    await tester.pumpAndSettle();
+
+    expect(find.byType(CupertinoAdaptiveTextSelectionToolbar), findsOneWidget);
+
+    gesture = await tester.startGesture(
+      textOffsetToPosition(tester, 2),
+      kind: PointerDeviceKind.mouse,
+    );
+    await tester.pump();
+
+    // After the gesture is down but not up, the toolbar is already gone.
+    expect(find.byType(CupertinoAdaptiveTextSelectionToolbar), findsNothing);
+
+    await gesture.up();
+    await tester.pumpAndSettle();
+
+    expect(find.byType(CupertinoAdaptiveTextSelectionToolbar), findsNothing);
+  },
+    skip: isContextMenuProvidedByPlatform, // [intended] only applies to platforms where we supply the context menu.
+    variant: TargetPlatformVariant.all(excluding: <TargetPlatform>{ TargetPlatform.iOS }),
+  );
 }

packages/flutter/test/material/text_field_test.dart

@@ -16315,6 +16315,53 @@ void main() {
       expectedConfiguration.spellCheckSuggestionsToolbarBuilder,
     );
   }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.android, TargetPlatform.iOS }));
+
+  testWidgets('text selection toolbar is hidden on tap down', (WidgetTester tester) async {
+    final TextEditingController controller = TextEditingController(
+      text: 'blah1 blah2',
+    );
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: Center(
+            child: TextField(
+              controller: controller,
+            ),
+          ),
+        ),
+      ),
+    );
+
+    expect(find.byType(AdaptiveTextSelectionToolbar), findsNothing);
+
+    TestGesture gesture = await tester.startGesture(
+      textOffsetToPosition(tester, 8),
+      kind: PointerDeviceKind.mouse,
+      buttons: kSecondaryMouseButton,
+    );
+    await tester.pump();
+    await gesture.up();
+    await tester.pumpAndSettle();
+
+    expect(find.byType(AdaptiveTextSelectionToolbar), findsOneWidget);
+
+    gesture = await tester.startGesture(
+      textOffsetToPosition(tester, 2),
+      kind: PointerDeviceKind.mouse,
+    );
+    await tester.pump();
+
+    // After the gesture is down but not up, the toolbar is already gone.
+    expect(find.byType(AdaptiveTextSelectionToolbar), findsNothing);
+
+    await gesture.up();
+    await tester.pumpAndSettle();
+
+    expect(find.byType(AdaptiveTextSelectionToolbar), findsNothing);
+  },
+    skip: isContextMenuProvidedByPlatform, // [intended] only applies to platforms where we supply the context menu.
+    variant: TargetPlatformVariant.all(excluding: <TargetPlatform>{ TargetPlatform.iOS }),
+  );
 }
 
 /// A Simple widget for testing the obscure text.