Add const constructor to TextInputFormatter (#116654)
* Add const constructor to TextInputFormatter
* Fix test
* Add abstract
* Add noSuchMethod
Signed-off-by: Shogo Hida <shogo.hida@gmail.com>
* Add @override and void
Signed-off-by: Shogo Hida <shogo.hida@gmail.com>
* Fix text and position of test
Signed-off-by: Shogo Hida <shogo.hida@gmail.com>
Signed-off-by: Shogo Hida <shogo.hida@gmail.com>
diff --git a/packages/flutter/lib/src/services/text_formatter.dart b/packages/flutter/lib/src/services/text_formatter.dart
index d565cc9..8ba5d0d 100644
--- a/packages/flutter/lib/src/services/text_formatter.dart
+++ b/packages/flutter/lib/src/services/text_formatter.dart
@@ -88,6 +88,9 @@
/// * [FilteringTextInputFormatter], a provided formatter for filtering
/// characters.
abstract class TextInputFormatter {
+ /// This constructor enables subclasses to provide const constructors so that they can be used in const expressions.
+ const TextInputFormatter();
+
/// Called when text is being typed or cut/copy/pasted in the [EditableText].
///
/// You can override the resulting text based on the previous text value and
diff --git a/packages/flutter/test/services/text_formatter_test.dart b/packages/flutter/test/services/text_formatter_test.dart
index 088fc28..0202e95 100644
--- a/packages/flutter/test/services/text_formatter_test.dart
+++ b/packages/flutter/test/services/text_formatter_test.dart
@@ -6,10 +6,26 @@
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';
+class TestTextInputFormatter extends TextInputFormatter {
+ const TestTextInputFormatter();
+
+ @override
+ void noSuchMethod(Invocation invocation) {
+ super.noSuchMethod(invocation);
+ }
+}
+
void main() {
TextEditingValue testOldValue = TextEditingValue.empty;
TextEditingValue testNewValue = TextEditingValue.empty;
+ test('test const constructor', () {
+ const TestTextInputFormatter testValue1 = TestTextInputFormatter();
+ const TestTextInputFormatter testValue2 = TestTextInputFormatter();
+
+ expect(testValue1, same(testValue2));
+ });
+
test('withFunction wraps formatting function', () {
testOldValue = TextEditingValue.empty;
testNewValue = TextEditingValue.empty;
