listings：使用不同颜色高亮显示 LaTeX2e 和 expl3 代码

Question

我计划为我的软件包编写新的文档，特别是这次我希望改进代码显示。

下面是我目前用于代码突出显示的代码。要突出显示命令，必须将命令名称添加到列表中moretexcs。这不是很方便，更重要的是，它似乎不能很好地与_命令名称中包含 expl3 命令配合使用。

我的问题是，应该如何配置才能使传统的 LaTeX2e 命令和新expl3命令具有不同的颜色？（最好是自动的，并且不依赖于像这样的列表moretexcs）

提前感谢您的任何善意建议！

\documentclass{article}

\usepackage{setspace}
\usepackage{xcolor}
\usepackage{listings}
\definecolor{maintheme}{RGB}{70,130,180}
\definecolor{forestgreen}{RGB}{21,122,81}
\definecolor{lightergray}{gray}{0.99}
\lstset{language=[LaTeX]TeX,
    keywordstyle=\color{maintheme},
    basicstyle=\ttfamily,
    commentstyle=\color{forestgreen}\ttfamily,
    stringstyle=\rmfamily,
    showstringspaces=false,
    breaklines=true,
    frame=lines,
    backgroundcolor=\color{lightergray},
    flexiblecolumns=true,
    escapeinside={(*}{*)},
    % numbers=left,
    numberstyle=\scriptsize, stepnumber=1, numbersep=5pt,
    % firstnumber=last,
}
\providecommand{\meta}[1]{$\langle${\normalfont\itshape#1}$\rangle$}
\lstset{moretexcs=%
    {part,parttext,chapter,section,subsection,subsubsection,frontmatter,mainmatter,backmatter,tableofcontents,href,
    }
}
\lstnewenvironment{code}%
{\setstretch{1.07}%
\setkeys{lst}{columns=fullflexible,keepspaces=true}%
}{}
\lstnewenvironment{code*}%
{\setstretch{1.07}%
\setkeys{lst}{numbers=left,columns=fullflexible,keepspaces=true}%
}{}

\newcommand{\packageoption}[1]{\texttt{\textcolor{black!67!green}{#1}}}
\newcommand{\commandoption}[1]{\texttt{\textcolor{black!67!cyan}{#1}}}

\begin{document}

\begin{code}
\documentclass[(*\packageoption{options}*)]{class}
\end{code}

\lstinline|\traditionalcommand|

\begin{code}
\mymodule_some_command:nn {} {}
\end{code}

\lstinline|\expl_command:|

\end{document}

Answer 1

listings在查阅了一段时间的文档后，我找到了以下解决方案。仍然需要手动将命令名称添加到moretexcs，但可以分别设置 LaTeX2 和 LaTeX3 命令的颜色。

关键是使用classoffset，而对于 LaTeX3 命令，需要alsoletter = {_,:}。

\documentclass{article}

\usepackage{setspace}
\usepackage{xcolor}
\usepackage{listings}
\definecolor{code-main}{RGB}{70,130,180}
\definecolor{code-expl3}{RGB}{240,50,100}
\definecolor{code-comment}{RGB}{21,122,81}
\definecolor{code-background}{gray}{0.99}
\lstset{
    language = [LaTeX]TeX,
    basicstyle = \ttfamily,
    keywordstyle = \color{code-main},
    commentstyle = \color{code-comment},
    showstringspaces = false,
    breaklines = true,
    frame = lines,
    backgroundcolor = \color{code-background},
    flexiblecolumns = true,
    escapeinside = {(*}{*)},
    alsoletter = {_,:},
    % numbers = left,
    % firstnumber = last,
    numberstyle = \scriptsize\ttfamily,
    stepnumber = 1,
    numbersep = 5pt,
}
\newcommand{\meta}[1]{$\langle${\normalfont\itshape#1}$\rangle$}
\lstset{% LaTeX2 commands
    classoffset = 0,
    texcsstyle =* \color{code-main},
    moretexcs =
      {
        part,parttext,chapter,section,subsection,subsubsection,frontmatter,mainmatter,backmatter,tableofcontents,href,
        traditionalcommand
      }
}
\lstset{% LaTeX3 commands
    classoffset = 1,
    texcsstyle =* \color{code-expl3},
    moretexcs =
      {
        mymodule_some_command:nn, expl_command:
      }
}
\lstnewenvironment{code}{\setstretch{1.07}}{}
\lstnewenvironment{code*}{\setstretch{1.07}\lstset{numbers=left}}{}

\newcommand{\packageoption}[1]{\texttt{\textcolor{black!67!green}{#1}}}
\newcommand{\commandoption}[1]{\texttt{\textcolor{black!67!cyan}{#1}}}

\begin{document}

\begin{code}
\documentclass[(*\packageoption{options}*)]{class}
\end{code}

\lstinline|\traditionalcommand|

\begin{code}
\mymodule_some_command:nn {} {}
\end{code}

\lstinline|\expl_command:|

\end{document}