Fix ActivateIntent overriding the spacebar for text entry (#91129)

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

@@ -1149,6 +1149,10 @@ class WidgetsApp extends StatefulWidget {
   /// with "s".
   static bool debugAllowBannerOverride = true;
 
+  // Any shortcuts added here have the potential to conflict with normal text
+  // input. If this should not happen and text input should take preference,
+  // then add a shortcut for the relevant key in DefaultTextEditingShortcuts
+  // mapped to DoNothingAndStopPropagationTextIntent.
   static const Map<ShortcutActivator, Intent> _defaultShortcuts = <ShortcutActivator, Intent>{
     // Activation
     SingleActivator(LogicalKeyboardKey.enter): ActivateIntent(),
@@ -1206,6 +1210,11 @@ class WidgetsApp extends StatefulWidget {
   };
 
   // Default shortcuts for the macOS platform.
+  //
+  // Any shortcuts added here have the potential to conflict with normal text
+  // input. If this should not happen and text input should take preference,
+  // then add a shortcut for the relevant key in DefaultTextEditingShortcuts
+  // mapped to DoNothingAndStopPropagationTextIntent.
   static const Map<ShortcutActivator, Intent> _defaultAppleOsShortcuts = <ShortcutActivator, Intent>{
     // Activation
     SingleActivator(LogicalKeyboardKey.enter): ActivateIntent(),

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

@@ -160,6 +160,13 @@ class DefaultTextEditingShortcuts extends Shortcuts {
     child: child,
   );
 
+  static const Map<ShortcutActivator, Intent> _commonShortcuts = <ShortcutActivator, Intent>{
+    // Allows space and enter to be used as input instead of a shortcut by
+    // another widget. See https://github.com/flutter/flutter/issues/90907
+    SingleActivator(LogicalKeyboardKey.space): DoNothingAndStopPropagationTextIntent(),
+    SingleActivator(LogicalKeyboardKey.enter): DoNothingAndStopPropagationTextIntent(),
+  };
+
   static const Map<ShortcutActivator, Intent> _androidShortcuts = <ShortcutActivator, Intent>{
     SingleActivator(LogicalKeyboardKey.backspace): DeleteTextIntent(),
     SingleActivator(LogicalKeyboardKey.backspace, control: true): DeleteByWordTextIntent(),
@@ -532,7 +539,7 @@ class DefaultTextEditingShortcuts extends Shortcuts {
     SingleActivator(LogicalKeyboardKey.keyA, meta: true): DoNothingAndStopPropagationTextIntent(),
   };
 
-  static Map<ShortcutActivator, Intent> get _shortcuts {
+  static Map<ShortcutActivator, Intent> get _platformShortcuts {
     if (kIsWeb) {
       return _webShortcuts;
     }
@@ -552,4 +559,11 @@ class DefaultTextEditingShortcuts extends Shortcuts {
         return _windowsShortcuts;
     }
   }
+
+  static Map<ShortcutActivator, Intent> get _shortcuts {
+    return <ShortcutActivator, Intent>{
+      ..._commonShortcuts,
+      ..._platformShortcuts,
+    };
+  }
 }

packages/flutter/test/widgets/editable_text_test.dart

@@ -8,6 +8,7 @@ import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/services.dart';
+import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 import '../rendering/mock_canvas.dart';
@@ -8635,6 +8636,71 @@ void main() {
     await tester.pump();
     expect(scrollController.offset.roundToDouble(), 0.0);
   });
+
+  // Regression test for https://github.com/flutter/flutter/issues/90907.
+  testWidgets("ActivateIntent doesn't block space entry", (WidgetTester tester) async {
+    final FocusNode focusNode = FocusNode();
+    bool invoked = false;
+
+    await tester.pumpWidget(MaterialApp(
+      home: Scaffold(
+        body: Align(
+          alignment: Alignment.topLeft,
+          child: SizedBox(
+            width: 100,
+            child: ListTile(
+              title: Actions(
+                actions: <Type, Action<Intent>>{
+                  ActivateIntent: CallbackAction<ActivateIntent>(
+                    onInvoke: (ActivateIntent intent) {
+                      invoked = true;
+                    },
+                  ),
+                },
+                child: Column(
+                  children: <Widget>[
+                    EditableText(
+                      autofocus: true,
+                      showSelectionHandles: true,
+                      maxLines: 2,
+                      controller: TextEditingController(),
+                      focusNode: FocusNode(),
+                      cursorColor: Colors.red,
+                      backgroundCursorColor: Colors.blue,
+                      style: Typography.material2018(platform: TargetPlatform.android).black.subtitle1!.copyWith(fontFamily: 'Roboto'),
+                      keyboardType: TextInputType.text,
+                    ),
+                    Focus(
+                      focusNode: focusNode,
+                      child: const Text('Hello'),
+                    ),
+                  ],
+                ),
+              ),
+            ),
+          ),
+        ),
+      ),
+    ));
+
+    await tester.sendKeyEvent(LogicalKeyboardKey.space);
+    await tester.sendKeyEvent(LogicalKeyboardKey.enter);
+    await tester.pump();
+    expect(invoked, isFalse);
+
+    focusNode.requestFocus();
+    await tester.pump();
+    await tester.sendKeyEvent(LogicalKeyboardKey.space);
+    await tester.pump();
+    expect(invoked, isTrue);
+
+    invoked = false;
+    await tester.pump();
+    await tester.sendKeyEvent(LogicalKeyboardKey.enter);
+    await tester.pump();
+    // On the web, enter doesn't activate any controls except for buttons.
+    expect(invoked, kIsWeb ? isFalse : isTrue);
+  });
 }
 
 class UnsettableController extends TextEditingController {