[Tex/LaTex] Fitting codes in a Latex Code block

codelistings

    \usepackage{listings}           
    \begin{document}

\lstset{language=Java}        

\begin{lstlisting}[frame=single]  

             PDDocument doc = PDDocument.load(file);
             String content = new PDFTextStripper().getText(doc);
             doc.close();
             return new Indexitem((long)file.getName().hashCode(), file.getName(), content);

\end{lstlisting}
    \end{document}

Considering the above code, my question is how to fit the code into its block? Assuming we are using a double-column template.

Best Answer

,breakatwhitespace,gobble=10 is an alternative solution:

\documentclass{article}
\usepackage{listings}           
\begin{document}

\lstset{language=Java}        
%\begin{lstlisting}[frame=single,gobble=14,basicstyle=\scriptsize\ttfamily]
%\begin{lstlisting}[frame=single,breaklines,breakatwhitespace,gobble=10]
\begin{lstlisting}[frame=single,breaklines]

             PDDocument doc = PDDocument.load(file);
             String content = new PDFTextStripper().getText(doc);
             doc.close();
             return new Indexitem((long)file.getName().hashCode(), file.getName(), content);

\end{lstlisting}
\end{document}

Related Solutions

[Tex/LaTex] Framing two-column listings with a tikz node : “missing \item” error

I don't really know anything about listings or multicol and particularly haven't a clue as to why they complain so much about being put in a box (presumably to do with how multicol works its magic). So I went back to the original specification: to get a listings listing in a columnar setup within a TikZ node. I came up with the following solution. What seemed to be the key was to avoid precisely that situation that your code lands in: that something reads in the listing ahead of time and then resets it somewhere else. Several of the commands that I chose to use had a "read ahead" version, and I found that the code did not work if I chose that one. For example, I had to use a minipage instead of a \parbox.

Anyway, this will need tweaking I'm sure - particularly with regard to line widths - but it does seem to do the basic "put a 2-column listing in a TikZ node".

\documentclass{article}

\usepackage{listings}
\usepackage{tikz}
\usepackage{multicol}

\tikzstyle{sourcecodebox} = [
 fill=white, draw=black, inner sep=1em, rectangle
]

\makeatletter
\lstnewenvironment{lstfigurelisting}[1][]{%
  \tikzpicture
  \node[sourcecodebox] (box)
  \bgroup
  \minipage{.75\textwidth}
  \lstset{frame=none,#1}
}
{
\endminipage
\egroup;
\endtikzpicture
}
\makeatother

\begin{document}

Some code here:

\begin{lstfigurelisting}[multicols=2]
#!/usr/bin/env python
  def main():
  print "Hello, World!"
  if __name__ == '__main__':
  main()
\end{lstfigurelisting}
\end{document}

Result:

listings in a node

[Tex/LaTex] Using “listings” package to colorize the source code of ANTLR grammar file

Updated Version:

Here is an updated version which addresses your requirements:

Double slash are comments are in gray and italics
Strings in single quote are green
Literals (written in all caps) are dark blue (but need to be specified)
options{} is in black until a trailing } is encountered.
Everything else is magenta
Line breaking is enabled (see lines 5-7)

enter image description here

Code:

\documentclass{article}
\usepackage{xcolor}
\usepackage{listings}

\lstset{% This applies to ALL lstlisting
    backgroundcolor=\color{yellow!10},%
    numbers=left, numberstyle=\tiny, stepnumber=2, numbersep=5pt,%
    }%

% Applies only when you use it
\lstdefinestyle{MyLang}{
    basicstyle=\small\ttfamily\color{magenta},%
    breaklines=true,%                                      allow line breaks
    moredelim=[s][\color{green!50!black}\ttfamily]{'}{'},% single quotes in green
    moredelim=*[s][\color{black}\ttfamily]{options}{\}},%  options in black (until trailing })
    commentstyle={\color{gray}\itshape},%                  gray italics for comments
    morecomment=[l]{//},%                                  define // comment
    emph={%
        STRING%                                            literal strings listed here
        },emphstyle={\color{blue}\ttfamily},%              and formatted in blue
    alsoletter={:,|,;},%
    morekeywords={:,|,;},%                                 define the special characters
    keywordstyle={\color{black}},%                         and format them in black
}

\begin{document}
\begin{lstlisting}[style=MyLang]
options {
    language=Java;
    //backtrack=true;
    // please comment it in for correct lexer generation!
    // the definitions of many operators require backtracking!
} 


// program blocks

program
    : (declaration)+
    ;

declaration 
    :  metaDeclaration
    |  actionDeclaration
    |  globalDeclaration
    |  eventDeclaration 
    ;   

metaDeclaration
    : 'meta' metaParam STRING? ';'
    ;

metaParam 
    : 'version'
    | 'name'
    | 'icon'
    | 'color'
    | 'private'
    ;

globalDeclaration
    : 'var' varIdentifier ':' typeIdentifier 
       codeblock
    ;\end{lstlisting}
\end{document}

Initial Version

Adapting the solution from Extend a language with additional keywords? should get you started: