static AnsiTextStyle()
{
Empty = new AnsiTextStyle();
Empty.Fg = -1;
Empty.Bg = -1;
Empty.IsBold = false;
Empty.IsInverse = false;
}
public static ColorMessage CreateFromAnsi(string str, AnsiTextStyle lastStyle)
{
ColorMessage colorMsg = Ansi.ParseAnsi(str, ref lastStyle);
return(colorMsg);
}
public static ColorMessage ParseAnsi(string text, ref AnsiTextStyle currentStyle)
{
StringBuilder stringBuilder = new StringBuilder(text.Length);
List <ColorMessage.MetaData> metaData = new List <ColorMessage.MetaData>();
int pos = 0;
int oldPos = 0;
AnsiTextStyle previousStyle = currentStyle;
if (!currentStyle.IsEmpty)
{
ColorMessage.MetaData md = new ColorMessage.MetaData(stringBuilder.Length, currentStyle.ToTextStyle());
metaData.Add(md);
}
while (pos < text.Length)
{
if (text[pos] == '\t')
{
stringBuilder.Append(' ', 4);
pos++;
continue;
}
if (text[pos] != ESC)
{
stringBuilder.Append(text[pos]);
pos++;
continue;
}
oldPos = pos;
pos++; // skip ESC
if (pos >= text.Length)
{
stringBuilder.Append(text.Substring(oldPos, pos - oldPos));
continue;
}
if (text[pos] == '[')
{
pos++; // skip [
if (pos >= text.Length)
{
ChiConsole.WriteLineLow("Incomplete ansi sequence");
stringBuilder.Append(text.Substring(oldPos, pos - oldPos));
continue;
}
int seqStart = pos;
while (pos < text.Length && ((text[pos] >= '0' && text[pos] <= '9') || text[pos] == ';'))
{
pos++;
}
if (pos == text.Length)
{
ChiConsole.WriteLineLow("Incomplete ansi sequence");
stringBuilder.Append(text.Substring(oldPos, pos - oldPos));
continue;
}
if (text[pos] == 'm')
{
int seqEnd = pos;
pos++; // skip m
string str2 = text.Substring(seqStart, seqEnd - seqStart);
string[] arr = str2.Split(';');
if (str2.Length == 0)
{
arr = new string[] { "0" }
}
;
for (int i = 0; i < arr.Length; i++)
{
int num = System.Int16.Parse(arr[i]);
switch (num)
{
case 0: // normal
currentStyle.Fg = -1;
currentStyle.Bg = -1;
currentStyle.IsBold = false;
currentStyle.IsInverse = false;
break;
case 1: // bold
currentStyle.IsBold = true;
break;
case 7: // inverse
currentStyle.IsInverse = true;
break;
case 30:
case 31:
case 32:
case 33:
case 34:
case 35:
case 36:
case 37:
currentStyle.Fg = num - 30;
break;
case 38:
if (arr.Length != 3 || i != 0 || arr[1] != "5")
{
ChiConsole.WriteLineLow("Illegal 256 color ansi code: {0}", str2);
break;
}
currentStyle.Fg = byte.Parse(arr[2]);
i += 3;
break;
case 39: // default color
currentStyle.Fg = -1;
break;
case 40:
case 41:
case 42:
case 43:
case 44:
case 45:
case 46:
case 47:
currentStyle.Bg = num - 40;
break;
case 48:
if (arr.Length != 3 || i != 0 || arr[1] != "5")
{
ChiConsole.WriteLineLow("Illegal 256 color ansi code: {0}", str2);
break;
}
currentStyle.Bg = byte.Parse(arr[2]);
i += 3;
break;
case 49: // default color
currentStyle.Bg = -1;
break;
default:
ChiConsole.WriteLineLow("Unknown ansi code {0}", num);
break;
}
}
if (!previousStyle.IsSame(currentStyle))
{
ColorMessage.MetaData md = new ColorMessage.MetaData(stringBuilder.Length, currentStyle.ToTextStyle());
metaData.Add(md);
}
previousStyle = currentStyle;
}
else if (text[pos] == 'H')
{
pos++;
}
else if (text[pos] == 'J')
{
pos++;
}
else
{
ChiConsole.WriteLine("Unknown ansi command: {0}", text[pos]);
}
}
}
return(new ColorMessage(stringBuilder.ToString(), metaData));
}
public bool IsSame(AnsiTextStyle style)
{
return(Fg == style.Fg && Bg == style.Bg && IsBold == style.IsBold && IsInverse == style.IsInverse);
}
