//scans incoming text for ANSI control sequences, parses them, and returns a list of styled text runs
public List <MUDToken> Translate(string text, MUDServerConnection connection, TelnetParser telnetParser, bool textGrouping)
{
if (!String.IsNullOrEmpty(text))
{
File.AppendAllText("D:\\temp\\output-" + logpostfix + ".txt", "<text>" + text + "</text>");
}
if (leftoverText != null)
{
text = leftoverText + text;
leftoverText = null;
}
List <MUDToken> tokens = new List <MUDToken>();
if (string.IsNullOrEmpty(text))
{
return(tokens);
}
MUDToken currentToken = new MUDToken();
int index = 0;
MatchCollection matches = Regex.Matches(text, this.ansiControlRegEx);
while (index < text.Length)
{
Match match = matches.OfType <Match>().SingleOrDefault(x => x.Index == index);
if (match != null)
{
if (currentToken.Content.Length > 0)
{
tokens.Add(currentToken);
currentToken = new MUDToken();
}
var control = new ANSIControlSequence(match.Value);
if (HandleANSIControl(control, currentToken, connection, telnetParser))
{
tokens.Add(currentToken);
currentToken = new MUDToken();
}
index += match.Length;
}
else
{
if (text[index] == ansiControlCharacter)
{
// must have a truncated ansi control sequence, split by transmission boundaries.
// We have no choice but to wait for the next transmission.
leftoverText = text.Substring(index);
break;
}
else if (text[index] == '\r')
{
if (currentToken.Content.Length > 0)
{
tokens.Add(currentToken);
currentToken = new MUDToken();
}
currentToken.Content.Append("\r\n");
currentToken.TokenType = MUDTokenType.NewLine;
tokens.Add(currentToken);
currentToken = new MUDToken();
if (index == text.Length - 1)
{
break;
}
else
{
index++;
}
}
else if (text[index] == '\n' && index == 0)
{
// must have split up an "\r\n" along transmission boundaries, which means it was added at the last
// loop. Just ignore this one then.
index++;
continue;
}
else if (text[index] == '\b')
{
// backspace. Christ.
if (currentToken.Content.Length > 0)
{
currentToken.Content.Remove(currentToken.Content.Length - 1, 1);
}
}
else
{
currentToken.Content.Append(ReplaceSpecialCharacters(text[index]));
}
index++;
}
}
if (currentToken.Content.Length > 0)
{
if (currentToken.TokenType == MUDTokenType.Text && textGrouping == true && currentToken.String != "(N)onstop, (Q)uit, or (C)ontinue?")
{
// If "text grouping" is enabled then we don't submit any text blocks if they are last. We'll wait for the next non-text
// transmission to submit it.
if (leftoverText != null)
{
leftoverText = currentToken.String + leftoverText;
}
else
{
leftoverText = currentToken.String;
}
}
else
{
tokens.Add(currentToken);
}
}
var strings = from token in tokens
select String.Format("<{0}>{1}</{0}>", token.TokenType, token.TokenType == MUDTokenType.NewLine? "\\r\\n" : token.String);
File.AppendAllLines("D:\\temp\\tokens-" + logpostfix + ".txt", strings);
return(tokens);
}
private bool HandleANSIControl(ANSIControlSequence control, MUDToken token, MUDServerConnection connection, TelnetParser telnetParser)
{
bool handled = false;
if (control.Operation == 'm')
{
token.TokenType = MUDTokenType.Color;
handled = true;
}
else if (control.Operation == 'n')
{
// Query cursor position. Respond with an arbitrary value for now.
// TODO: figure out if we really need to handle this better.
if (control.Arguments.Count == 1 && control.Arguments[0] == 6)
{
telnetParser.sendTelnetBytes(ASCIIEncoding.ASCII.GetBytes("\x1b[4;6R"));
}
handled = false;
}
else if (control.Operation == '!')
{
// seriously don't have a clue what this does.
handled = false;
}
else if (control.Operation == 'J')
{
// clear text, line, screen. Either way, just ignore it.
handled = false;
}
else if (control.Operation == 'K')
{
token.TokenType = MUDTokenType.EraseLine;
handled = true;
}
else if (control.Operation == 'D')
{
token.TokenType = MUDTokenType.CursorBackward;
handled = true;
}
else if (control.Operation == 'A' ||
control.Operation == 'B' ||
control.Operation == 'C' ||
control.Operation == 'H')
{
// cursor stuff, just ignore it.
handled = false;
}
else
{
handled = false;
}
if (handled)
{
token.Content.Append(control.RawText);
token.Arguments.AddRange(control.Arguments);
return(true);
}
return(false);
}
