General ⇒ Code listing

[muusle]

I’m migrating from Word to Latex for reason well known on this forum I’ll bet. Though I’m starting to see why I’m migrating, I’m not convinced – yet…

Code listings turned out to be a quite nice experience, of that I’m relieved, being one of the reasons why I stuck with Word (cause of the source formatting, copy/paste from my fav code editor).

There is one more piece to the puzzle I really want to achieve with the code listing; the ability to somehow highlight a line with a custom background color (indicating new futures etc).

I use this technique in Word to highlight a portion of the code, making it very easy to spot the essentials and at the same time show the context of the code, making it clearer.

I use the listings package.

Any suggestions/pointers are appreciated.

[Berticus]

Like changing the background color of a text?

Code: Select all

\definecolor{yellow}{cmyk}{0,0,1,0}
\colorbox{yellow}{this is the highlighted text}

Preamble needs to have:

Code: Select all

\usepackage{color}

[muusle]

Tanks for the reply.

Yes, it's simple as that; applying a background color to portion of the code (without loosing the highlighting).

Here is what I've got so far (screenshot):

Code: Select all

\lstset{caption=Code listing; netbeans style}
\begin{lstlisting}
for(int i=0; i < 10; i++) {
	System.out.printf("Counting up, current: %d", i);
}
\end{lstlisting} 

This is what I want to do (in a somewhat elegant/easy way):


I don't see how I'm gonna use the the colorbox method to do this, having to break back to latex interpretation from the literal mode the listings function operates in.

Suggestions?

[phi]

Here is an example:

Code: Select all

\begin{lstlisting}[language=Java, caption=Code listing; netbeans style, moredelim={**[il][\rlap{\textcolor{yellow}{\rule[-3pt]{\linewidth}{\baselineskip}}}]{$}}]
for(int i=0; i < 10; i++) {
$   System.out.printf("Counting up, current: %d", i);
}
\end{lstlisting}

[phi]

And a variant that adds exactly the same margin above and below the highlighted line:

Code: Select all

\newcommand*{\alphabet}{ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz}
\newlength{\highlightheight}
\newlength{\highlightdepth}
\newlength{\highlightmargin}
\setlength{\highlightmargin}{2pt}
\settoheight{\highlightheight}{\alphabet}
\settodepth{\highlightdepth}{\alphabet}
\addtolength{\highlightheight}{\highlightmargin}
\addtolength{\highlightdepth}{\highlightmargin}
\addtolength{\highlightheight}{\highlightdepth}
\newcommand*{\highlightline}{\rlap{\textcolor{yellow}{\rule[-\highlightdepth]{\linewidth}{\highlightheight}}}}


\begin{document}

\begin{lstlisting}[language=Java, caption=Code listing; netbeans style, moredelim={**[il][\highlightline]{$}}]

[muusle]

Thanks! That was exactly what I was looking for!