format method

String format(dynamic number)

Format a number according to the settings of this number formatter instance.

Implementation

String format(dynamic number) {
  if (number == null) {
    return '';
  }
  if (number is! num && number is! String) {
    throw ArgumentError(
        'Invalid argument type. Expected num or String, got ${number.runtimeType}');
  }
  if (number is num && (number.isNaN || number.isInfinite)) {
    return number.toString();
  }

  final double n =
      number is String ? double.parse(number) : (number as num).toDouble();

  if (_type == 'number') {
    final String formatted =
        (_style == 'scientific') ? _formatScientific(n) : _formatStandard(n);
    if (n < 0) {
      return _templateNegative.replaceAll('{n}', formatted);
    }
    return formatted;
  } else {
    // currency or percentage
    final String formatted = _formatStandard(n);
    final String template = (n < 0) ? _templateNegative : _template;
    String result = template.replaceAll('{n}', formatted);
    if (_type == 'currency' && _currencySign != null) {
      result = result.replaceAll('{s}', _currencySign!);
    }
    return result;
  }
}