find method

Implementation

int find(int i) {
  if (i == _spent) {
    return -1;
  }
  final n = text.length;
  if (i > 0 && text.codeUnitAt(i - 1) == _dollarSign) {
    return -1;
  }
  var k = i + 1;
  if (k < n && text.codeUnitAt(k) == _dollarSign) {
    return -1;
  }
  var blank = true;
  while (k < n) {
    final c = text.codeUnitAt(k);
    if (c == 0x0A) {
      return -1;
    }
    if (c == _dollarSign && text.codeUnitAt(k - 1) != _backslashChar) {
      break;
    }
    if (blank && !isUnicodeWhitespace(c)) {
      blank = false;
    }
    k += 1;
  }
  if (k >= n || blank) {
    return -1;
  }
  if (k + 1 < n && text.codeUnitAt(k + 1) == _dollarSign) {
    return -1;
  }
  if ((leadsPrice(text, i) && leadsPrice(text, k)) ||
      (followsPrice(text, i) && followsPrice(text, k))) {
    _spent = k;
    return -1;
  }
  return k;
}