[web] Don't show handles when selection change is caused by keyboard (#65127)

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

@@ -1643,7 +1643,11 @@ class EditableTextState extends State<EditableText> with AutomaticKeepAliveClien
       }
     }
 
-    _formatAndSetValue(value);
+    if (_isSelectionOnlyChange(value)) {
+      _handleSelectionChanged(value.selection, renderEditable, SelectionChangedCause.keyboard);
+    } else {
+      _formatAndSetValue(value);
+    }
 
     if (_hasInputConnection) {
       // To keep the cursor from blinking while typing, we want to restart the
@@ -1653,6 +1657,10 @@ class EditableTextState extends State<EditableText> with AutomaticKeepAliveClien
     }
   }
 
+  bool _isSelectionOnlyChange(TextEditingValue value) {
+    return value.text == _value.text && value.composing == _value.composing;
+  }
+
   @override
   void performAction(TextInputAction action) {
     switch (action) {

packages/flutter/test/material/text_field_test.dart

@@ -7795,6 +7795,48 @@ void main() {
     },
   );
 
+  testWidgets('Does not show handles when updated from the web engine', (WidgetTester tester) async {
+    final TextEditingController controller = TextEditingController(
+      text: 'abc def ghi',
+    );
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Material(
+          child: TextField(controller: controller),
+        ),
+      ),
+    );
+
+    // Interact with the text field to establish the input connection.
+    final Offset topLeft = tester.getTopLeft(find.byType(EditableText));
+    final TestGesture gesture = await tester.startGesture(
+      topLeft + const Offset(0.0, 5.0),
+      kind: PointerDeviceKind.mouse,
+    );
+    addTearDown(gesture.removePointer);
+    await tester.pump(const Duration(milliseconds: 50));
+    await gesture.up();
+    await tester.pumpAndSettle();
+
+    final EditableTextState state = tester.state(find.byType(EditableText));
+    expect(state.selectionOverlay.handlesAreVisible, isFalse);
+    expect(controller.selection, const TextSelection.collapsed(offset: 0));
+
+    if (kIsWeb) {
+      tester.testTextInput.updateEditingValue(const TextEditingValue(
+        selection: TextSelection(baseOffset: 2, extentOffset: 7),
+      ));
+      // Wait for all the `setState` calls to be flushed.
+      await tester.pumpAndSettle();
+      expect(
+        state.currentTextEditingValue.selection,
+        const TextSelection(baseOffset: 2, extentOffset: 7),
+      );
+      expect(state.selectionOverlay.handlesAreVisible, isFalse);
+    }
+  });
+
   testWidgets('Tapping selection handles toggles the toolbar', (WidgetTester tester) async {
     final TextEditingController controller = TextEditingController(
       text: 'abc def ghi',

packages/flutter/test/widgets/editable_text_test.dart

@@ -1398,6 +1398,46 @@ void main() {
     }
   });
 
+  testWidgets('Read-only fields do not format text', (WidgetTester tester) async {
+    SelectionChangedCause selectionCause;
+
+    final TextEditingController controller =
+        TextEditingController(text: 'Lorem ipsum dolor sit amet');
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: EditableText(
+          readOnly: true,
+          controller: controller,
+          backgroundCursorColor: Colors.grey,
+          focusNode: focusNode,
+          style: textStyle,
+          cursorColor: cursorColor,
+          selectionControls: materialTextSelectionControls,
+          onSelectionChanged: (TextSelection selection, SelectionChangedCause cause) {
+            selectionCause = cause;
+          },
+        ),
+      ),
+    );
+
+    // Interact with the field to establish the input connection.
+    final Offset topLeft = tester.getTopLeft(find.byType(EditableText));
+    await tester.tapAt(topLeft + const Offset(0.0, 5.0));
+    await tester.pump();
+
+    expect(tester.testTextInput.hasAnyClients, kIsWeb ? isTrue : isFalse);
+    if (kIsWeb) {
+      tester.testTextInput.updateEditingValue(const TextEditingValue(
+        text: 'Foo bar',
+        selection: TextSelection(baseOffset: 0, extentOffset: 3),
+      ));
+      // On web, the only way a text field can be updated from the engine is if
+      // a keyboard is used.
+      expect(selectionCause, SelectionChangedCause.keyboard);
+    }
+  });
+
   testWidgets('Fires onChanged when text changes via TextSelectionOverlay', (WidgetTester tester) async {
     String changedValue;
     final Widget widget = MaterialApp(

packages/flutter/test/widgets/selectable_text_test.dart

@@ -3971,4 +3971,45 @@ void main() {
       TargetPlatform.windows,
     }),
   );
+
+  testWidgets('Does not show handles when updated from the web engine', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const MaterialApp(
+        home: Material(
+          child: SelectableText('abc def ghi'),
+        ),
+      ),
+    );
+
+    // Interact with the selectable text to establish the input connection.
+    final Offset topLeft = tester.getTopLeft(find.byType(EditableText));
+    final TestGesture gesture = await tester.startGesture(
+      topLeft + const Offset(0.0, 5.0),
+      kind: PointerDeviceKind.mouse,
+    );
+    addTearDown(gesture.removePointer);
+    await tester.pump(const Duration(milliseconds: 50));
+    await gesture.up();
+    await tester.pumpAndSettle();
+
+    final EditableTextState state = tester.state(find.byType(EditableText));
+    expect(state.selectionOverlay.handlesAreVisible, isFalse);
+    expect(
+      state.currentTextEditingValue.selection,
+      const TextSelection.collapsed(offset: 0),
+    );
+
+    if (kIsWeb) {
+      tester.testTextInput.updateEditingValue(const TextEditingValue(
+        selection: TextSelection(baseOffset: 2, extentOffset: 7),
+      ));
+      // Wait for all the `setState` calls to be flushed.
+      await tester.pumpAndSettle();
+      expect(
+        state.currentTextEditingValue.selection,
+        const TextSelection(baseOffset: 2, extentOffset: 7),
+      );
+      expect(state.selectionOverlay.handlesAreVisible, isFalse);
+    }
+  });
 }