Send text selection rects to engine on iPhone (#113048)

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

@@ -63,10 +63,6 @@ const Duration _kCursorBlinkHalfPeriod = Duration(milliseconds: 500);
 // is shown in an obscured text field.
 const int _kObscureShowLatestCharCursorTicks = 3;
 
-// The minimum width of an iPad screen. The smallest iPad is currently the
-// iPad Mini 6th Gen according to ios-resolution.com.
-const double _kIPadWidth = 1488.0;
-
 /// A controller for an editable text field.
 ///
 /// Whenever the user modifies a text field with an associated
@@ -3144,10 +3140,6 @@ class EditableTextState extends State<EditableText> with AutomaticKeepAliveClien
     if (defaultTargetPlatform != TargetPlatform.iOS) {
       return;
     }
-    // This is to avoid sending selection rects on non-iPad devices.
-    if (WidgetsBinding.instance.window.physicalSize.shortestSide < _kIPadWidth) {
-      return;
-    }
 
     final String text = renderEditable.text?.toPlainText(includeSemanticsLabels: false) ?? '';
     final List<Rect> firstSelectionBoxes = renderEditable.getBoxesForSelection(const TextSelection(baseOffset: 0, extentOffset: 1));

packages/flutter/test/widgets/editable_text_test.dart

@@ -4624,6 +4624,10 @@ void main() {
   });
 
   testWidgets('selection rects are sent when they change', (WidgetTester tester) async {
+    addTearDown(tester.binding.window.clearPhysicalSizeTestValue);
+    // Ensure selection rects are sent on iPhone (using SE 3rd gen size)
+    tester.binding.window.physicalSizeTestValue = const Size(750.0, 1334.0);
+
     final List<MethodCall> log = <MethodCall>[];
     SystemChannels.textInput.setMockMethodCallHandler((MethodCall methodCall) async {
       log.add(methodCall);