public static string Escape(char s)
{
return(TexFormulaParser.IsParserReserved(s) ? "\\" + s : new string(s, 1));
}
///Returning: 0-Not found, 1-Symbol, 2-Command, 3-Font, 4-Misc
static int FindPossibleEscape(string text, int pos, out int start, out int end)
{
start = 0;
end = 0;
pos--;
if (text.Length <= 0 || pos < 0 || pos >= text.Length)
{
return(0);
}
if (TexFormulaParser.IsParserReserved(text[pos]))
{
if (pos == 0 || text[pos - 1] != '\\')
{
if (pos == 0 || text[pos] != '\\')
{
return(0);
}
else if (pos < text.Length - 1)
{
pos++;
}
else
{
start = pos - 1;
end = pos;
return(4);
}
}
else
{
start = pos - 1;
end = pos;
return(4);
}
}
end = pos;
while (true)
{
if (char.IsLetter(text[pos]))
{
pos--;
if (pos >= 0)
{
continue;
}
else
{
return(0);
}
}
if (text[pos] == '\\')
{
if (pos == 0 || text[pos - 1] != '\\')
{
start = pos;
break;
}
}
return(0);
}
while (end < text.Length && char.IsLetter(text[end]))
{
end++;
}
end--;
var s = text.Substring(start + 1, end - start);
if (TEXPreference.main.GetFontIndexByID(s) >= 0)
{
return(3);
}
if (TexFormulaParser.isCommandRegistered(s))
{
return(2);
}
if (TEXPreference.main.GetChar(s) != null)
{
return(1);
}
return(4);
}