asString method

String asString()

Implementation

String asString() {
  String ret = '';
  if (!_hasInit) {
    return ret;
  }
  if (_output != null) {
    return _output ?? "";
  }
  if (options['add_space'] && options['sign'] == '' && (_arg ?? 0) >= 0) {
    options['sign'] = ' ';
  }
  if ((_arg ?? 0).isInfinite) {
    if ((_arg ?? 0).isNegative) {
      options['sign'] = '-';
    }
    ret = 'inf';
    options['padding_char'] = ' ';
  }
  if ((_arg ?? 0).isNaN) {
    ret = 'nan';
    options['padding_char'] = ' ';
  }
  if (options['precision'] == -1) {
    options['precision'] = 6;
  } else if (formatType == 'g' && options['precision'] == 0) {
    options['precision'] = 1;
  }
  if (_arg is num) {
    if (_isNegative) {
      options['sign'] = '-';
    }
    if (formatType == 'e') {
      ret = asExponential(options['precision'], removeTrailingZeros: false);
    } else if (formatType == 'f') {
      ret = asFixed(options['precision'], removeTrailingZeros: false);
    } else {
      // type == g
      int _exp = _exponent;
      var sigDigs = options['precision'];
      if (-4 <= _exp && _exp < options['precision']) {
        sigDigs -= _decimal;
        num precision = max(options['precision'] - 1 - _exp, sigDigs);
        ret = asFixed(precision.toNumInt,
            removeTrailingZeros: !options['alternate_form']);
      } else {
        ret = asExponential(options['precision'] - 1,
            removeTrailingZeros: !options['alternate_form']);
      }
    }
  }
  var minChars = options['width'];
  num strLen = ret.length + options['sign'].length;
  String padding = '';
  if (minChars > strLen) {
    if (options['padding_char'] == '0' && !options['left_align']) {
      padding = Formatter.getPadding(minChars - strLen, '0');
    } else {
      padding = Formatter.getPadding(minChars - strLen, ' ');
    }
  }
  if (options['left_align']) {
    ret = "${options['sign']}$ret$padding";
  } else if (options['padding_char'] == '0') {
    ret = "${options['sign']}$padding$ret";
  } else {
    ret = "$padding${options['sign']}$ret";
  }
  if (options['is_upper']) {
    ret = ret.toUpperCase();
  }
  return (_output = ret);
}