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I would like to highlight text including user-defined commands with linebreaks. I found a solution for linebreaks (Colorbox does not linebreak), but the \ctext{} command cannot treat other commands in its argument.

My MWE is as follows:

\documentclass{article}

\usepackage{lipsum}
\usepackage{xcolor}
\usepackage{soul}
\usepackage{etoolbox}
\usepackage{ifmtarg}


\newcommand{\red}[1]{{\color{red} #1}}


\newcommand{\ctext}[3][RGB]{%
   \begingroup
   \definecolor{hlcolor}{#1}{#2}\sethlcolor{hlcolor}%
   \hl{#3}%
   \endgroup
}


%Frame of command '\spec'
\newcommand{\defineSpecies}[2]{\csdef{spec@#1}{#2}}
\newrobustcmd{\spec}[1]{%
  \ifcsname spec@#1\endcsname%
    \csuse{spec@#1}%
  \else
    \GenericError{}{Undefined species `#1'}{}{}
  \fi
}


\defineSpecies{h216o}{H$_2^{~16}$O}


\begin{document}


\ctext[RGB]{0,209,0}{\red{\spec{h216o}}}


\end{document}
TobiR
  • 584
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    If you're using LuaTeX use the lua-ul package instead of the soul package. Else the ulem package is more robust than the soul package, but inside of ulem you get no automatic hyphenation. – Skillmon Apr 18 '23 at 09:31
  • @Skillmon So the ctext command cannot be repaired? And what command do you think about in ulem? – TobiR Apr 18 '23 at 09:37
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    well, see soul's documentation, it states a list of stuff that doesn't work (not sure whether that list is exhaustive), in summary: soul is not stable and only works for simple stuff. I think ulem doesn't have a \hl-like command out of the box, but you can define it yourself (you should be able to find examples on this site). – Skillmon Apr 18 '23 at 10:59
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    As @Skillmon wrote: use lualatex and the lua-ul package. Everything else has shortcomings. – Ulrike Fischer Apr 18 '23 at 11:49
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    @TobiR Can you give some examples? The question is too generic to receive sensible answers. We now have \text_expand:n which might be what you want. – egreg Apr 18 '23 at 15:22
  • @egreg Thanks for dealing with this issue. I have updated my question, including an ifmtarg-based command. – TobiR Apr 18 '23 at 15:37

0 Answers0