Function convertToHTML

src/bbcode.cpp:265–316

};

QString convertToHTML(const QString& inputParam)
{
  // this code goes over the input string once and replaces all bbtags
  // it encounters. This function is called recursively for every replaced
  // string to convert nested tags.
  //
  // This could be implemented simpler by applying a set of regular expressions
  // for each recognized bb-tag one after the other but that would probably be
  // very inefficient (O(n^2)).

  QString input = inputParam.mid(0).replace("\r\n", "<br/>");
  input.replace("\\\"", "\"").replace("\\'", "'");
  QString result;
  int lastBlock = 0;
  int pos       = 0;

  // iterate over the input buffer
  while ((pos = input.indexOf('[', lastBlock)) != -1) {
    // append everything between the previous tag-block and the current one
    result.append(input.mid(lastBlock, pos - lastBlock));

    if ((pos < (input.size() - 1)) && (input.at(pos + 1) == '/')) {
      // skip invalid end tag
      int tagEnd = input.indexOf(']', pos) + 1;
      if (tagEnd == 0) {
        // no closing tag found
        // move the pos up one so that the opening bracket is ignored next iteration
        pos++;
      } else {
        pos = tagEnd;
      }
    } else {
      // convert the tag and content if necessary
      int length          = -1;
      QString replacement = BBCodeMap::instance().convertTag(input.mid(pos), length);
      if (length != 0) {
        result.append(convertToHTML(replacement));
        // length contains the number of characters in the original tag
        pos += length;
      } else {
        // nothing replaced
        result.append('[');
        ++pos;
      }
    }
    lastBlock = pos;
  }

  // append the remainder (everything after the last tag)
  result.append(input.mid(lastBlock));
  return result;
}

}  // namespace BBCode