MarkdownSharp.Markdown.handleTrailingParens C# (CSharp) Méthode

        private static string handleTrailingParens(Match match)
        {
            // The first group is essentially a negative lookbehind -- if there's a < or a =", we don't touch this.
            // We're not using a *real* lookbehind, because of links with in links, like <a href="http://web.archive.org/web/20121130000728/http://www.google.com/">
            // With a real lookbehind, the full link would never be matched, and thus the http://www.google.com *would* be matched.
            // With the simulated lookbehind, the full link *is* matched (just not handled, because of this early return), causing
            // the google link to not be matched again.
            if (match.Groups[1].Success)
                return match.Value;

            var protocol = match.Groups[2].Value;
            var link = match.Groups[3].Value;
            if (!link.EndsWith(")"))
                return "<" + protocol + link + ">";
            var level = 0;
            foreach (Match c in Regex.Matches(link, "[()]"))
            {
                if (c.Value == "(")
                {
                    if (level <= 0)
                        level = 1;
                    else
                        level++;
                }
                else
                {
                    level--;
                }
            }
            var tail = "";
            if (level < 0)
            {
                link = Regex.Replace(link, @"\){1," + (-level) + "}$", m => { tail = m.Value; return ""; });
            }
            if (tail.Length > 0)
            {
                var lastChar = link[link.Length - 1];
                if (!_endCharRegex.IsMatch(lastChar.ToString()))
                {
                    tail = lastChar + tail;
                    link = link.Substring(0, link.Length - 1);
                }
            }
            return "<" + protocol + link + ">" + tail;
        }