how can I create a tcolorbox with line numbering?

Question

I created the following tcolorbox:

\documentclass{article}

\usepackage{tcolorbox}
\usepackage{lineno}


\begin{document}
\begin{tcolorbox}[middle=0mm,boxsep=0mm]
Headers

\tcblower

\setlength\linenumbersep{-.1cm} %sets the distance of the line numbers from the margin
\setcounter{linenumber}{1}
\begin{internallinenumbers}

\begin{itemize}
\item bullet 1
\item bullet 2
\item bullet 3
\begin{equation}
a = b,
\end{equation}
\noindent where $a$ and $b$ are...
\end{itemize}

\end{internallinenumbers}

\end{tcolorbox}
\end{document}

However, as you can see, the line numbers on the left margin are not showing well. I would like not to number empty lines (but only number the bullet points and equation). Is there a way to make the line number more reasonable?

The main cause for this is \begin{equation}...\end{equation} — , Feb 07 '16 at 12:10
So what if I want equations in the line numbering environment? — Thailnd, Feb 07 '16 at 19:51
if it helps, I will be happy if equations are even not numbered at all, and ignored, but can appear in the internallinenumbers environment. — Thailnd, Feb 07 '16 at 21:46
If you are willing to use \tcbhighmath{a=b} it works (you can change the style of \tcbhighmath with highlight math style={...} — , Feb 07 '16 at 21:48
it doesn't seem to work for me with \tcbhighmath -- there are still empty lines marked with numbers, and the numbers are not quite aligned with the equation. — Thailnd, Feb 07 '16 at 23:36
Well, I can't help here -- I don't see the point in using line numbers unless you want to document code itself with LaTeX — , Feb 08 '16 at 00:12

score 2 · Answer 1 · answered Apr 12 '21 at 17:44

Based on a comment made by the OP, "if it helps, I will be happy if equations are even not numbered at all", one can resolve the issue by placing the math as inline, feigning displaymath with paragraph offsets and \hfils.

\documentclass{article}
\usepackage{tcolorbox}
\usepackage{lineno}
\begin{document}
\begin{tcolorbox}[middle=0mm,boxsep=0mm]
Headers
\tcblower
\setlength\linenumbersep{-.1cm} %sets the distance of the line numbers from the margin
\setcounter{linenumber}{1}
\begin{internallinenumbers}
\begin{itemize}
\item bullet 1
\item bullet 2
\item bullet 3
\hfil$%\begin{equation}
a = b,
$\hfil%\end{equation}
\noindent where $a$ and $b$ are...
\end{itemize}
\end{internallinenumbers}
\end{tcolorbox}
\end{document}

how can I create a tcolorbox with line numbering?

1 Answers1

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