当前页面包含 KOMA-Script 类中的脚注时，如何将 footsepline 本地设置为 0pt

Question

我认为，仅仅因为脚注而删除脚注分隔线是没有意义的。然而，主要问题是确定脚注是打印的还是注释的。下面我将使用一个技巧来实现这一点。只有当\footnoterule此页面有脚注时，才会打印。在本例中，我使用以下方法添加标签：

\xapptocmd{\footnoterule}{\label{footrule\thepage}}{}{\PatchFailure}

scrlayer-scrpage现在，我可以修补用于打印规则的内部命令，仅在标签未知时打印它：

\xpatchcmd\sls@hf@rule{\begingroup}{%
  \@tempswatrue
  \Ifstr{#1}{footsep}{%
    \ifcsname r@footrule\thepage\endcsname\@tempswafalse\fi
  }{}%
  \if@tempswa\begingroup
}{}{\PatchFailed}
\xpatchcmd\sls@hf@rule{\endgroup}{%
  \endgroup\fi
}{}{\PatchFailed}

注意：因为我正在修补一个内部命令，所以这可能会失败，内部会发生scrlayer-scrpage改变。

\documentclass[%
DIV=12, % division factor
headsepline=0.8pt, % header line
footsepline=0.4pt, % footer line
numbers=noenddot, % no dots at the end of section numbering
]{scrartcl} % 11pt, a4paper (default)

\usepackage[automark]{scrlayer-scrpage} % KOMA-Script package for headers, footers, pagestyles
\usepackage{setspace}\setdisplayskipstretch{} % For spacing
\usepackage[english]{babel} % Multilingual support
\usepackage[babel]{microtype} % Microtypography
\usepackage{xpatch} % For patching commands
\usepackage{lipsum} % For placeholder texts

    % Replace \autodot with for "." \section headings
\xpretocmd{\sectionformat}{\def\autodot{.}}{}{\cfPatchFailed} % For headings

    % Headers
\renewcommand{\sectionmarkformat}{\thesection.\enskip} % Add period after section number in the header
\automark[section]{section}
\automark*[subsection]{subsection}

    % Shift the footer down
\ModifyLayer[addvoffset=.6ex]{scrheadings.foot.oneside}
\ModifyLayer[addvoffset=.6ex]{plain.scrheadings.foot.oneside}

    % Footers
\addtokomafont{pagenumber}{\normalsize\sffamily} % page number font
\ifoot*{} % inner footer
\cfoot*{\pagemark} % central footer
\ofoot*{} % outer footer

    % Footnote rule
\setfootnoterule[0.4pt]{\textwidth}

    % Footnotes
\deffootnote{0.5em}{0em}{\makebox[0.5em][l]{\textsuperscript{\thefootnotemark}}}

\usepackage{xpatch}
\xapptocmd{\footnoterule}{\label{footrule\thepage}}{}{\PatchFailed}
\makeatletter
% NOTE: Patching an internal command is always a hack and can fail in future!
\xpatchcmd\sls@hf@rule{\begingroup}{%
  \@tempswatrue
  \Ifstr{#1}{footsep}{%
    \ifcsname r@footrule\thepage\endcsname\@tempswafalse\fi
  }{}%
  \if@tempswa\begingroup
}{}{\PatchFailed}
\xpatchcmd\sls@hf@rule{\endgroup}{%
  \endgroup\fi
}{}{\PatchFailed}
\makeatother

\begin{document}
\onehalfspacing
\KOMAoptions{DIV=current}
    \section{Section}
    \subsection{Subsection}
    \lipsum[1-9]\footnote{\lipsum[1][1-10]}
\end{document}

由于使用了标签，这至少需要运行两次 LaTeX。也许可以改进页面上是否有脚注的检测，使其无需标签即可工作。

Answer 1