captionslistings
When not specifying a caption for a lstlisting nothing is shown below the listing while "Listing #: mycaption" is displayed as soon as I specify a caption.
However, I'd like "Listing #" to be displayed for all listings; even those without a caption (those with a caption should keep their "Listing #: mycaption" of course).
Is this possible? If yes, how?
Thanks to egreg, you can use a custom counter to keep track of the last line number and resume from there:
\documentclass{article}
\usepackage{xcolor}
\usepackage{listings}
\newcounter{main}
\setcounter{main}{1}
\lstnewenvironment{code}[1][firstnumber=\themain,name=main]
{\lstset{language=haskell,
basicstyle=\small\ttfamily,
numbers=left,
numberstyle=\tiny\color{gray},
backgroundcolor=\color{lightgray},
#1
}
}
{\setcounter{main}{\value{lstnumber}}}
\begin{document}
\begin{code}
foo bar first line
foo bar second line
foo bar third line
\end{code}
some text
\begin{lstlisting}[backgroundcolor=\color{lightgray!20}]
some other non-code listing
\end{lstlisting}
\begin{code}
listing continued
\end{code}
\end{document}
As pointed out by Werner the normal way to prevent listings to do any package breaks is the option float. However this can't be done globally without changing the internals of listing.
Another hack would be to surround the environment listings with a non breakable box. This can be achieved with the facilities of the package etoolbox and the provided commands \BeforeEnvironment and \AfterEnvironment:
\BeforeBeginEnvironment{listings}{\par\noindent\begin{minipage}{\linewidth}}
\AfterEndEnvironment{listings}{\end{minipage}\par\addvspace{\topskip}}
Of course instead of minipage you can use any other environment.
Best Answer
You can use
caption=\relax; however, then you'll get "Listing #:" with the colon. I don't know how to remove this.EDIT: OK, here's a nasty hack that removes the colon if the caption is
\relax. It works with my version oflistings, but it might not work in future versions.