formatEditUpdate method
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 the incoming new text value.
When formatters are chained, oldValue
reflects the initial value of
TextEditingValue at the beginning of the chain.
Implementation
@override
TextEditingValue formatEditUpdate(
TextEditingValue oldValue,
TextEditingValue newValue,
) {
var isErasing = newValue.text.length < oldValue.text.length;
_lastValue = newValue.text;
var onlyNumbers = toNumericString(
newValue.text,
allowAllZeroes: true,
);
String maskedValue;
if (isErasing) {
if (newValue.text.isEmpty) {
_clearCountry();
}
}
if (shouldCorrectNumber && onlyNumbers.length >= 2) {
/// хак специально для России, со вводом номера с восьмерки
/// меняем ее на 7
var isRussianWrongNumber =
onlyNumbers[0] == '8' && onlyNumbers[1] == '9' ||
onlyNumbers[0] == '8' && onlyNumbers[1] == '3';
if (isRussianWrongNumber) {
onlyNumbers = '7${onlyNumbers.substring(1)}';
_countryData = null;
_applyMask(
'7',
allowEndlessPhone,
);
}
final isAustralianPhoneNumber =
onlyNumbers[0] == '0' && onlyNumbers[1] == '4';
if (isAustralianPhoneNumber) {
onlyNumbers = '61${onlyNumbers.substring(1)}';
_countryData = null;
_applyMask('61', allowEndlessPhone);
}
}
maskedValue = _applyMask(onlyNumbers, allowEndlessPhone);
if (maskedValue == oldValue.text && onlyNumbers != '7') {
_lastValue = maskedValue;
if (isErasing) {
var newSelection = oldValue.selection;
newSelection = newSelection.copyWith(
baseOffset: oldValue.selection.baseOffset,
extentOffset: oldValue.selection.baseOffset,
);
return oldValue.copyWith(
selection: newSelection,
);
}
return oldValue;
}
final endOffset = newValue.text.length - newValue.selection.end;
final selectionEnd = maskedValue.length - endOffset;
_lastValue = maskedValue;
return TextEditingValue(
selection: TextSelection.collapsed(
offset: selectionEnd,
),
text: maskedValue,
);
}