25-7-26-1

lib/controller/functions/digit_obsecur_formate.dart

@@ -0,0 +1,42 @@
+// import 'package:flutter/services.dart';
+
+// class DigitObscuringFormatter extends TextInputFormatter {
+//   @override
+//   TextEditingValue formatEditUpdate(
+//       TextEditingValue oldValue, TextEditingValue newValue) {
+//     final maskedText = maskDigits(newValue.text);
+//     return newValue.copyWith(
+//         text: maskedText,
+//         selection: updateCursorPosition(maskedText, newValue.selection));
+//   }
+
+//   String maskDigits(String text) {
+//     final totalDigits = text.length;
+//     final visibleDigits = 4;
+//     final hiddenDigits = totalDigits - visibleDigits * 2;
+
+//     final firstVisibleDigits = text.substring(0, visibleDigits);
+//     final lastVisibleDigits = text.substring(totalDigits - visibleDigits);
+
+//     final maskedDigits = List.filled(hiddenDigits, '*').join();
+
+//     return '$firstVisibleDigits$maskedDigits$lastVisibleDigits';
+//   }
+
+//   TextSelection updateCursorPosition(
+//       String maskedText, TextSelection currentSelection) {
+//     final cursorPosition = currentSelection.baseOffset;
+//     final cursorOffset =
+//         currentSelection.extentOffset - currentSelection.baseOffset;
+//     final totalDigits = maskedText.length;
+//     const visibleDigits = 4;
+//     final hiddenDigits = totalDigits - visibleDigits * 2;
+
+//     final updatedPosition = cursorPosition <= visibleDigits
+//         ? cursorPosition
+//         : hiddenDigits + visibleDigits + (cursorPosition - visibleDigits);
+
+//     return TextSelection.collapsed(
+//         offset: updatedPosition, affinity: currentSelection.affinity);
+//   }
+// }