使用 xpatch 修改 \sectionlinesformat 以使用 KOMA-Script 更改附录标题的格式

Question

我想用 KOMA-Script 更改附录部分标题的显示方式。我可以通过使用 手动修补 来实现我想要的行为\begin{appendices}...，\renewcommand{\sectionlinesformat}但我想改用xpatch并在文档的 pramble 中处理它。我知道我的补丁有效，因为我成功地用\cref它更改了别名。%%%% ATTEMPTS SHOWN BELOW注释下是我测试过的两段不起作用的代码。错误是两次尝试（不使用和使用 @hangfrom）都缺少被视为 0 的数字和非法的测量单位，而且我还遇到了一些错误，可能是 @hangfrom 缺少一个项目。

\documentclass[12pt,
twoside=false,
letterpaper,
hidelinks,
parskip=half+,
%onehalfspacing,  % see setstrecj after \begin{document}
bibliography=numbered,
numbers=noenddot]{scrartcl}

\renewcommand\sectionlinesformat[4]{% used by free-standing headings with style=section
    \makebox[0pt][r]{#3}#4}

%\usepackage{appendix} % use this if you want Appendix in the TOC
\usepackage[titletoc,title]{appendix} % use this if you want Appendix in the TOC
\usepackage{hyperref}
\usepackage[nameinlink,noabbrev,capitalize]{cleveref}  % cref
\usepackage{xpatch}

\crefname{appsec}{Appendix}{Appendices}

%%%% ATTEMPTS SHOWN BELOW

%\makeatletter
\xapptocmd\appendices{%
    \crefalias{section}{appsec}
    %%%% Test 1 does not work
%   \renewcommand{\sectionlinesformat}[4]{% change appendix format
%       \hskip #2#3\\#4%
%   }
    %%%% Test 2 does not work
%   \renewcommand{\sectionlinesformat}[4]{% change appendix format
%   \@hangfrom{\hskip #2#3}#4%
%   }
}{}{\PatchFailed}
%\makeatother




\begin{document}

\tableofcontents

\section{Some section with number in the margin}
Reference to \cref{appa}


\begin{appendices} 



\section{Something appended} \label{appa}
    %%% Test: this works
%%  \renewcommand{\sectionlinesformat}[4]{% change appendix format
%%      \hskip #2#3\\#4%
%%  }

Test appendix
\end{appendices}

\end{document}

Answer 1

使用别名：

\documentclass[12pt,
twoside=false,
letterpaper,
hidelinks,
parskip=half+,
%onehalfspacing,  % see setstrecj after \begin{document}
bibliography=numbered,
numbers=noenddot]{scrartcl}

\renewcommand\sectionlinesformat[4]{% used by free-standing headings with style=section
    \makebox[0pt][r]{#3}#4}

%\usepackage{appendix} % use this if you want Appendix in the TOC
\usepackage[titletoc,title]{appendix} % use this if you want Appendix in the TOC
\usepackage{hyperref}
\usepackage[nameinlink,noabbrev,capitalize]{cleveref}  % cref
\usepackage{xpatch}

\crefname{appsec}{Appendix}{Appendices}

\xapptocmd\appendices{%
    \crefalias{section}{appsec}%
    \let\sectionlinesformat\modifiedsectionlinesformat
}{}{}
\makeatletter
\newcommand{\modifiedsectionlinesformat}[4]{% change appendix format
  \@hangfrom{\hskip #2#3}#4%
}
\makeatother

\begin{document}

\tableofcontents

\section{Some section with number in the margin}
Reference to \cref{appa}

\begin{appendices} 

\section{Something appended} \label{appa}

Test appendix
\end{appendices}

\end{document}