void GetRichTag(string str, ref int i, StringBuilder dst)
{
if (i >= str.Length || str[i] != '<')
{
return;
}
i++;
var head = TexFormulaParser.LookForAWord(str, ref i);
TexFormulaParser.SkipWhiteSpace(str, ref i);
var param = TexFormulaParser.ReadGroup(str, ref i, '<', '>');
dst.Append(TransparseRichTag(head, param));
dst.Append('{');
var end = str.IndexOf("</" + head + ">", i);
i++;
if (end < 0)
{
end = str.Length;
}
while (i < end)
{
var ii = i;
var c = str[i++];
var n = i < str.Length ? str[i] : '\0';
if (c == '<' && char.IsLetter(n))
{
var cmd = TexFormulaParser.LookForAWord(str, ref i);
if (knownRichTagsHash.Contains(cmd))
{
i = ii;
GetRichTag(str, ref i, dst);
continue;
}
}
dst.Append(c);
}
if (i < str.Length)
{
while (str[i++] != '>')
{
}
}
dst.Append('}');
}
void TranslateLatex(string str, StringBuilder dst)
{
var i = 0;
char n = '\0';
while (i < str.Length)
{
var c = str[i++];
n = i < str.Length ? str[i] : '\0';
if (c == ' ')
{
if (!discardSpaces)
{
dst.Append(c);
}
}
else if (c == '\\')
{
if (TexFormulaParser.IsParserReserved(n))
{
dst.Append(c);
continue;
}
else if (char.IsLetter(n))
{
var cmd = TexFormulaParser.LookForAWord(str, ref i);
TexFormulaParser.SkipWhiteSpace(str, ref i);
// Symbol renames
if (cmd == "to")
{
dst.Append("\\rightarrow");
continue;
}
if (i >= str.Length)
{
dst.Append("\\" + cmd);
continue;
}
// Lim (or other funcs) goes to over/under if even there single script
if (cmd == "lim")
{
c = str[i];
if (c == '^' || c == '_')
{
dst.Append("\\" + cmd + c);
}
else
{
dst.Append("\\" + cmd);
}
continue;
}
// color but the id in braces
if (cmd == "color" && (str[i] == '{'))
{
var arg = TexFormulaParser.ReadGroup(str, ref i, '{', '}');
if (arg.IndexOf(' ') < 0)
{
dst.Append("\\color[" + arg + "]");
}
else
{
dst.Append("\\color{" + arg + "}");
}
continue;
}
// \over... or \under....
int ou = cmd.IndexOf("over") == 0 ? 2 : (cmd.IndexOf("under") == 0 ? 1 : 0);
if (ou != 0)
{
var second = cmd.Substring(ou == 2 ? 4 : 5);
if (second == "line")
{
dst.Append(ou == 2 ? "\\over" : "\\under");
continue;
}
c = str[i];
if (c == '{')
{
var arg1 = "{" + TexFormulaParser.ReadGroup(str, ref i, '{', '}') + "}";
if (second == "brace")
{
// \overbrace or \underbrace
if (i + 1 < str.Length)
{
c = str[i++]; n = str[i];
if ((c == '^' || c == '_') && n == '{')
{
// If there's script we need to think another strategy
var arg2 = TexFormulaParser.ReadGroup(str, ref i, '{', '}');
var arg3 = ou == 2 ? "\\lbrace" : "\\rbrace";
if (c == '^')
{
dst.Append("\\nfrac{\\size[.]{" + arg2 + "}__" + arg3 + "}{" + arg1 + "}");
}
else
{
dst.Append("\\nfrac{" + arg1 + "}{\\size[.]{" + arg2 + "}^^" + arg3 + "}");
}
continue;
}
else
{
i--;
}
}
}
dst.Append(arg1);
dst.Append(ou == 2 ? "^^" : "__");
dst.Append("\\" + second);
continue;
}
}
//Default behav
dst.Append("\\" + cmd);
}
}
else
{
dst.Append(c);
}
}
}
