Anton's Digital Garden

Code Snippets

3 min read

figure code listing.svg

\documentclass{article} \title{code listing}
\usepackage{listings,xcolor}
\lstdefinestyle{hlines}{
    basicstyle=\ttfamily\scriptsize, commentstyle=\textcolor{gray},
    breaklines=true, showstringspaces=false, columns=flexible,
    numbers=left, numberstyle=\tiny, frame=lines, frame=tb,
}
\lstset{style=hlines}
\begin{document}
\begin{lstinputlisting}[language=python, caption={Prime number}]{example.py}
\end{lstinputlisting}
\end{document}
  • Combine <= to
  • All languages
  • listings vs minted
  • in table
  • text copyable
  • lines numbers not are not selectable
  • verbatimn without escape characters ⇒ portable, copyable

Syntax

\documentclass{article}
\usepackage{yetenol-styles}
\lstset{style=⟨global style⟩}
\begin{document}
 
\verb`⟨inline source code⟩`
 
\begin{lstlisting}[language=⟨code language⟩]
⟨block source code⟩
\end{lstlisting}
 
\begin{lstinputlisting}[language=⟨code language⟩]{⟨file with source code⟩}
\end{lstinputlisting}
 
\end{document}
  • ⟨global style⟩: configure all code snippets
  • ⟨code language⟩: configure language for code highlighting
  • ⟨inline source code⟩: verbatim code to be printed within text
  • ⟨block source code⟩: verbatim code to be printed as a tile
  • ⟨file with source code⟩: relative path of the file to be printed
  • [p] minimal formatting information when creating the snippet; style definitions are moved to the preamble
  • [p] the code is independent of the project: no user-defined macros; clearly shows which package highlights the code

Input code from file, block, or inline

Layouts dots, colorful Longcode split Documentation Latex code code in table Supported languages Create custom language Multiple languages

Examples

Add inline code within a paragraph.

\documentclass{article}
\usepackage{yetenol-styles}
\lstset{style=block}
\begin{document}
 
Refer to the manual in \verb`README.md` for further information.
 
\end{document}

inline code.svg

Create a code block

\documentclass{article}
\usepackage{yetenol-styles}
\lstset{style=block}
\begin{document}
 
\begin{lstlisting}[language=python]
# Mauris viverra massa id lorem pretium gravida.
 
if num == 1:
  print(num, "is not a prime.")
elif num > 1:
  for i in range(2, num):
    if (num % i) == 0:
      print(num, "is a prime.")
      break
\end{lstlisting}
 
\end{document}

code block.svg

Print a source file’s content

\documentclass{article}
\usepackage{yetenol-styles}
\lstset{style=colorful}
\begin{document}
 
\begin{lstinputlisting}[language=python]{resources/script.py}
\end{lstinputlisting}
 
\end{document}

code file colorful.svg

Add a snippet caption and a label for cross references

\documentclass{article}
\usepackage{yetenol-styles}
\lstset{style=block}
\begin{document}
 
A python script file listed in snippet \ref{code:is-prime} tests if the given number is prime.
 
\begin{figure}\begin{lstlisting}[language=python]
# Mauris viverra massa id lorem pretium gravida.
 
if num == 1:
  print(num, "is not a prime.")
elif num > 1:
  for i in range(2, num):
    if (num % i) == 0:
      print(num, "is a prime.")
      break
\end{lstlisting}\caption{Test for prime number}\label{code:is-prime}
\end{figure}
 
\end{document}

caption label code.svg

Add custom styling

Use key-value pairs to configure code snippets of the listings package

Styling setup

Manually add the file yetenol-styles.sty

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{yetenol-styles}[]
\RequirePackage{listings} 
\RequirePackage{float}  % By default place tables at precisely their location in the code
\floatplacement{figure}{H}
\RequirePackage{etoolbox} % if style=yetenol, apply inline and block styles
\AtBeginEnvironment{lstlisting}{\noindent{\tiny\dotfill}}
\AfterEndEnvironment{lstlisting}{\tiny\dotfill\renewcommand{\figurename}{Snippet}}
\AtBeginEnvironment{lstinputlisting}{\noindent{\tiny\dotfill}}
\AfterEndEnvironment{lstinputlisting}{\tiny\dotfill\renewcommand{\figurename}{Snippet}}
\RequirePackage{xcolor} % Code block default style
\lstdefinestyle{dots}{
    basicstyle=\ttfamily\scriptsize,
    commentstyle=\color[rgb]{0.5,0.5,0.5},
    breaklines=true,
    numbers=left,
    numberstyle=\tiny,
    numbersep=7pt,
    aboveskip=0.5em,
    belowskip=0em,
    showstringspaces=false,
    xleftmargin=14pt,
    postbreak=\mbox{\hspace{-2.5em}\textcolor{gray}{$\hookrightarrow$}\space\space},
}
\definecolor{codegreen}{rgb}{0,0.6,0}
\definecolor{codegray}{rgb}{0.5,0.5,0.5}
\definecolor{codepurple}{rgb}{0.58,0,0.82}
\definecolor{backcolour}{rgb}{0.95,0.95,0.92}
\lstdefinestyle{colorful}{
  backgroundcolor=\color{backcolour},   
  commentstyle=\color{codegreen},
  keywordstyle=\color{magenta},
  numberstyle=\tiny\color{codegray},
  stringstyle=\color{codepurple},
  basicstyle=\ttfamily\footnotesize,
  breakatwhitespace=false,         
  breaklines=true,                 
  captionpos=b,                    
  keepspaces=true,                 
  numbers=left,                    
  numbersep=5pt,                  
  showspaces=false,                
  showstringspaces=false,
  showtabs=false,                  
  tabsize=2
}
\lstdefinestyle{lines}{
  belowcaptionskip=1\baselineskip,
  breaklines=true,
  frame=L,
  xleftmargin=\parindent,
  language=C,
  showstringspaces=false,
  basicstyle=\footnotesize\ttfamily,
  keywordstyle=\bfseries\color{green!40!black},
  commentstyle=\itshape\color{purple!40!black},
  identifierstyle=\color{blue},
  stringstyle=\color{orange},
}

Alternatives

Create an abbreviation macro for \lstinline

\documentclass{article}
\RequirePackage{listings}
\lstMakeShortInline`
\begin{document}
 
Try the package `\usepackage{amsmath}` instead.
 
\end{document}

Deprecated latex listings

Sources:

Related:

[[List related notes]]

Tags: Graphical elements - Standardize tables, images, plots

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