public static LinkFormatterResult Format(string input, int startIndex = 0, int space = 3)
{
LinkFormatterResult result = new LinkFormatterResult(input);
// handle the [link display] format
handleMatches(newFormatLink, "{2}", "{1}", result, startIndex);
// handle the ()[] link format
handleMatches(oldFormatLink, "{1}", "{2}", result, startIndex);
// handle wiki links
handleMatches(regexWiki, "wiki:{1}", "https://osu.ppy.sh/wiki/{1}", result, startIndex);
// handle bare links
handleAdvanced(advancedLink, result, startIndex);
// handle editor times
handleMatches(timeMatch, "{0}", "osu://edit/{0}", result, startIndex);
// handle channels
handleMatches(channelMatch, "{0}", "osu://chan/{0}", result, startIndex);
string empty = "";
while (space-- > 0)
{
empty += "\0";
}
handleMatches(emoji, empty, "{0}", result, startIndex); // 3 space,handleMatches will trim all empty char except \0
//result.Text = result.Text.Replace('\0', ' ');
return(result);
}
private static void handleAdvanced(Regex against, LinkFormatterResult result, int startIndex = 0)
{
foreach (Match m in against.Matches(result.Text, startIndex))
{
int index = m.Index;
string prefix = m.Groups["paren"].Value;
string link = m.Groups["link"].Value;
int indexLength = link.Length;
if (!String.IsNullOrEmpty(prefix))
{
index += prefix.Length;
if (link.EndsWith(")"))
{
indexLength = indexLength - 1;
link = link.Remove(link.Length - 1);
}
}
result.Links.Add(new Link(link, index, indexLength));
}
}
private static void handleMatches(Regex against, string display, string link, LinkFormatterResult result, int startIndex = 0)
{
int captureOffset = 0;
foreach (Match m in against.Matches(result.Text, startIndex))
{
int index = m.Index - captureOffset;
string displayText = string.Format(display,
m.Groups[0],
m.Groups.Count > 1 ? m.Groups[1].Value : "",
m.Groups.Count > 2 ? m.Groups[2].Value : "").Trim();
string linkText = string.Format(link,
m.Groups[0],
m.Groups.Count > 1 ? m.Groups[1].Value : "",
m.Groups.Count > 2 ? m.Groups[2].Value : "").Trim();
if (displayText.Length == 0 || linkText.Length == 0)
{
continue;
}
//ensure we don't have encapsulated links.
if (result.Links.Find(l => (l.Index <= index && l.Index + l.Length >= index + m.Length) || (index <= l.Index && index + m.Length >= l.Index + l.Length)) == null)
{
result.Text = result.Text.Remove(index, m.Length).Insert(index, displayText);
//since we just changed the line display text, offset any already processed links.
result.Links.ForEach(l => l.Index -= l.Index > index ? m.Length - displayText.Length : 0);
result.Links.Add(new Link(linkText, index, displayText.Length));
//adjust the offset for processing the current matches group.
captureOffset += (m.Length - displayText.Length);
}
}
}