Fix web text field shortcuts (#79056)

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

@@ -4,7 +4,7 @@
 
 import 'dart:ui' as ui show BoxHeightStyle, BoxWidthStyle;
 
-import 'package:flutter/foundation.dart' show defaultTargetPlatform, kIsWeb;
+import 'package:flutter/foundation.dart' show defaultTargetPlatform;
 import 'package:flutter/gestures.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/services.dart';
@@ -18,16 +18,6 @@ import 'theme.dart';
 
 export 'package:flutter/services.dart' show TextInputType, TextInputAction, TextCapitalization, SmartQuotesType, SmartDashesType;
 
-// This is a temporary fix for: https://github.com/flutter/flutter/issues/79012
-/// A map used to disable scrolling shortcuts in text fields.
-final Map<LogicalKeySet, Intent> _webScrollShortcutOverrides = <LogicalKeySet, Intent>{
-  LogicalKeySet(LogicalKeyboardKey.space): DoNothingAndStopPropagationIntent(),
-  LogicalKeySet(LogicalKeyboardKey.arrowUp): DoNothingAndStopPropagationIntent(),
-  LogicalKeySet(LogicalKeyboardKey.arrowDown): DoNothingAndStopPropagationIntent(),
-  LogicalKeySet(LogicalKeyboardKey.arrowLeft): DoNothingAndStopPropagationIntent(),
-  LogicalKeySet(LogicalKeyboardKey.arrowRight): DoNothingAndStopPropagationIntent(),
-};
-
 const TextStyle _kDefaultPlaceholderStyle = TextStyle(
   fontWeight: FontWeight.w400,
   color: CupertinoColors.placeholderText,
@@ -1222,7 +1212,7 @@ class _CupertinoTextFieldState extends State<CupertinoTextField> with Restoratio
       ),
     );
 
-    final Widget child = Semantics(
+    return Semantics(
       enabled: enabled,
       onTap: !enabled || widget.readOnly ? null : () {
         if (!controller.selection.isValid) {
@@ -1248,13 +1238,5 @@ class _CupertinoTextFieldState extends State<CupertinoTextField> with Restoratio
         ),
       ),
     );
-
-    if (kIsWeb) {
-      return Shortcuts(
-        shortcuts: _webScrollShortcutOverrides,
-        child: child,
-      );
-    }
-    return child;
   }
 }

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

@@ -24,16 +24,6 @@ import 'theme.dart';
 
 export 'package:flutter/services.dart' show TextInputType, TextInputAction, TextCapitalization, SmartQuotesType, SmartDashesType;
 
-// This is a temporary fix for: https://github.com/flutter/flutter/issues/79012
-/// A map used to disable scrolling shortcuts in text fields.
-final Map<LogicalKeySet, Intent> _webScrollShortcutOverrides = <LogicalKeySet, Intent>{
-  LogicalKeySet(LogicalKeyboardKey.space): DoNothingAndStopPropagationIntent(),
-  LogicalKeySet(LogicalKeyboardKey.arrowUp): DoNothingAndStopPropagationIntent(),
-  LogicalKeySet(LogicalKeyboardKey.arrowDown): DoNothingAndStopPropagationIntent(),
-  LogicalKeySet(LogicalKeyboardKey.arrowLeft): DoNothingAndStopPropagationIntent(),
-  LogicalKeySet(LogicalKeyboardKey.arrowRight): DoNothingAndStopPropagationIntent(),
-};
-
 /// Signature for the [TextField.buildCounter] callback.
 typedef InputCounterWidgetBuilder = Widget? Function(
   /// The build context for the TextField.
@@ -1311,7 +1301,7 @@ class _TextFieldState extends State<TextField> with RestorationMixin implements
       semanticsMaxValueLength = null;
     }
 
-    child = MouseRegion(
+    return MouseRegion(
       cursor: effectiveMouseCursor,
       onEnter: (PointerEnterEvent event) => _handleHover(true),
       onExit: (PointerExitEvent event) => _handleHover(false),
@@ -1339,13 +1329,5 @@ class _TextFieldState extends State<TextField> with RestorationMixin implements
         ),
       ),
     );
-
-    if (kIsWeb) {
-      return Shortcuts(
-        shortcuts: _webScrollShortcutOverrides,
-        child: child,
-      );
-    }
-    return child;
   }
 }

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

@@ -72,7 +72,7 @@ class _DoNothingAndStopPropagationTextAction extends TextEditingAction<DoNothing
   _DoNothingAndStopPropagationTextAction();
 
   @override
-  bool consumesKey(Intent intent) => true;
+  bool consumesKey(Intent intent) => false;
 
   @override
   void invoke(DoNothingAndStopPropagationTextIntent intent, [BuildContext? context]) {}

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

@@ -61,8 +61,7 @@ abstract class TextEditingAction<T extends Intent> extends ContextAction<T> {
 
   @override
   bool isEnabled(T intent) {
-    // The Action is disabled if there is no focused TextEditingActionTarget, or
-    // if the platform is web, because web lets the browser handle text editing.
-    return !kIsWeb && textEditingActionTarget != null;
+    // The Action is disabled if there is no focused TextEditingActionTarget.
+    return textEditingActionTarget != null;
   }
 }

packages/flutter/test/widgets/default_text_editing_actions_test.dart

+// 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_test/flutter_test.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/services.dart';
+import 'package:flutter/foundation.dart';
+
+class TestLeftIntent extends Intent {}
+class TestRightIntent extends Intent {}
+
+void main() {
+  testWidgets('DoNothingAndStopPropagationTextIntent', (WidgetTester tester) async {
+    bool leftCalled = false;
+    bool rightCalled = false;
+    final TextEditingController controller = TextEditingController(
+      text: 'blah1 blah2',
+    );
+    final FocusNode focusNodeTarget = FocusNode();
+    final FocusNode focusNodeNonTarget = FocusNode();
+
+    await tester.pumpWidget(MaterialApp(
+      theme: ThemeData(),
+      home: Scaffold(
+        body: Builder(
+          builder: (BuildContext context) {
+            return Shortcuts(
+              shortcuts: <LogicalKeySet, Intent>{
+                LogicalKeySet(LogicalKeyboardKey.arrowLeft): TestLeftIntent(),
+                LogicalKeySet(LogicalKeyboardKey.arrowRight): TestRightIntent(),
+              },
+              child: Shortcuts(
+                shortcuts: <LogicalKeySet, Intent>{
+                  LogicalKeySet(LogicalKeyboardKey.arrowRight): const DoNothingAndStopPropagationTextIntent(),
+                },
+                child: Actions(
+                  // These Actions intercept default Intents, set a flag that they
+                  // were called, and then call through to the default Action.
+                  actions: <Type, Action<Intent>>{
+                    TestLeftIntent: CallbackAction<TestLeftIntent>(onInvoke: (Intent intent) {
+                      leftCalled = true;
+                    }),
+                    TestRightIntent: CallbackAction<TestRightIntent>(onInvoke: (Intent intent) {
+                      rightCalled = true;
+                    }),
+                  },
+                  child: Center(
+                    child: Column(
+                      children: <Widget>[
+                        EditableText(
+                          controller: controller,
+                          focusNode: focusNodeTarget,
+                          style: Typography.material2018(platform: TargetPlatform.android).black.subtitle1!,
+                          cursorColor: Colors.blue,
+                          backgroundCursorColor: Colors.grey,
+                        ),
+                        Focus(
+                          focusNode: focusNodeNonTarget,
+                          child: const Text('focusable'),
+                        ),
+                      ],
+                    ),
+                  ),
+                ),
+              ),
+            );
+          },
+        ),
+      ),
+    ));
+
+    // Focus on the EditableText, which is a TextEditingActionTarget.
+    focusNodeTarget.requestFocus();
+    await tester.pump();
+    expect(focusNodeTarget.hasFocus, isTrue);
+    expect(focusNodeNonTarget.hasFocus, isFalse);
+    expect(controller.selection.isCollapsed, isTrue);
+    expect(controller.selection.baseOffset, 11);
+
+    // The left arrow key's Action is called.
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowLeft);
+    await tester.pump();
+    expect(leftCalled, isTrue);
+    expect(rightCalled, isFalse);
+    leftCalled = false;
+
+    // The right arrow key is blocked by DoNothingAndStopPropagationTextIntent.
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowRight);
+    await tester.pump();
+    expect(rightCalled, isFalse);
+    expect(leftCalled, isFalse);
+
+    // Focus on the other node, which is not a TextEditingActionTarget.
+    focusNodeNonTarget.requestFocus();
+    await tester.pump();
+    expect(focusNodeTarget.hasFocus, isFalse);
+    expect(focusNodeNonTarget.hasFocus, isTrue);
+
+    // The left arrow key's Action is called as normal.
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowLeft);
+    await tester.pump();
+    expect(leftCalled, isTrue);
+    expect(rightCalled, isFalse);
+    leftCalled = false;
+
+    // The right arrow key's Action is also called. That's because
+    // DoNothingAndStopPropagationTextIntent only applies if a
+    // TextEditingActionTarget is currently focused.
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowRight);
+    await tester.pump();
+    expect(leftCalled, isFalse);
+    expect(rightCalled, isTrue);
+  });
+}