Document Classes ⇒ Highlight one line in listings environment

[ajg112]

Hi All,

I'm using the listings environment to syntax highlight some code. I'd like to be able to highlight just a single line of the code, perhaps with a boxed outline, or a different background colour.

Code: Select all

\begin{lstlisting}
   start:$
   mov   r1,   xF0  -- Reset ptr value$
   mov   r2,   x00  -- Reset total value$
\end[lstlisting}

So, can I highlight just the

Code: Select all

'mov r1, xF0  -- Reset ptr value'

line?

Does anyone know if this possible, and if so, how it is done?

Many thanks
Andy

[phi]

I tried several things including adding customized delimiters (works fine as described in the manual, but is unusable for things like background colors) or combining the listings and fancyvrb packages (doesn't seem to work), but was never really successful. Perhaps it's easier to use an external pretty printer, or to draw a highlight rectangle manually.

[Juanjo]

Try this and modify it at your own convenience:

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\documentclass[12pt]{article}
\usepackage{listings,color}
\begin{document}

\newcommand{\Hilight}{\makebox[0pt][l]{\color{cyan}\rule[-4pt]{0.65\linewidth}{14pt}}}
\begin{lstlisting}[escapechar=\%]
   start:$
   %\Hilight%mov   r1,   xF0  -- Reset ptr value$
   mov   r2,   x00  -- Reset total value$
\end{lstlisting}
\end{document}

[ajg112]

phi, thank you for your efforts.

Juanjo, that works brilliantly. Many thanks.
I made a slight tweak:
\definecolor{lightGrey}{rgb}{0.9, 0.9, 0.9}
\newcommand{\Hilight}{\makebox[0pt][l]{\color{lightGrey}\rule[-0.45em]{\linewidth}{1.5em}}}

Thanks again
Andy

[Juanjo]

I've seen that, before I replied, you sent the same question to comp.text.tex. For the sake of completeness (and politeness), I think it would convenient to post here any interesting answer you receive there and conversely.