我有两种脚注，因此需要两种脚注规则。下面的 MnWE 描述了我想要看到的内容。
我可以通过取消注释该行来关闭标准规则
%\usepackage[norule]{footmisc}
但不知道如何有选择地启用它。
我很少会在一页上同时出现两种脚注，而且我的文档很少更改，因此黑客解决方案是可以接受的。
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\documentclass{memoir}
\pagestyle{ruled}
\setstocksize{2in}{5in} % for mwe
\settrimmedsize{2in}{5in} {*}
\setlrmarginsandblock{0.3in}{0.3in}{*}%%%%
\setulmarginsandblock{0.5in}{0.5in}{*}
\checkandfixthelayout
\fixpdflayout
%\usepackage[norule]{footmisc}
\newcommand{\biblio}[1]{%
\let\thempfn\relax% Remove footnote number printing mechanism
\footnotetext[0]{%
\hrule%
\vspace{0.1in}%
#1}% Print footnote text
}
\begin{document}
First page, with a biblio footnote. It should show just my hrule, and
no footnote rule.
\biblio{Bibiographic reference}
\newpage
Second page, with just an ordinary footnote. It should show the
ordinary footnote rule.
\footnote{This is an ordinary footnote.}
\newpage
Third page both a footnote and a biblio footnote. It should show both
the footnote rule and my hrule.
\footnote{This is an ordinary footnote.}
\biblio{Bibiographic reference}
\end{document}
答案1
也许是这样的？
该norule选项footmisc确实重新定义\footnoterule为通常不执行任何操作，而只是应用跳过。
我已经引入了\newif\iffootnoterule条件，即每次检查，如果为真，则应用(by )\footnoterule的存储定义。\footnoterule\let\latex@@footnoterule\footnoterule
这样就可以用\footnoteruletrue或进行切换\footnoterulefalse。
\documentclass{memoir}
\pagestyle{ruled}
\newif\iffootnoterule
\makeatletter
\AtBeginDocument{%
\let\latex@@footnoterule\footnoterule
\renewcommand\footnoterule{%
\iffootnoterule
\latex@@footnoterule%
\else
\advance\skip\footins 4\p@\@plus2\p@\relax%
\fi
}
}
\makeatother
\setstocksize{2in}{5in} % for mwe
\settrimmedsize{2in}{5in} {*}
\setlrmarginsandblock{0.3in}{0.3in}{*}%%%%
\setulmarginsandblock{0.5in}{0.5in}{*}
\checkandfixthelayout
\fixpdflayout
%\usepackage[norule]{footmisc}
\newcommand{\biblio}[1]{%
\let\thempfn\relax% Remove footnote number printing mechanism
\footnotetext[0]{%
\hrule%
\vspace{0.1in}%
#1}% Print footnote text
}
\begin{document}
First page, with a biblio footnote. It should show just my hrule, and
no footnote rule.
\biblio{Bibiographic reference}
\newpage
\footnoteruletrue
Second page, with just an ordinary footnote. It should show the
ordinary footnote rule.
\footnote{This is an ordinary footnote.}
\newpage
Third page both a footnote and a biblio footnote. It should show both
the footnote rule and my hrule.
\footnote{This is an ordinary footnote.}
\biblio{Bibiographic reference}
\end{document}
编辑：这是一个更新版本，它可以自动管理脚注规则的存在/不存在，方法是在每页开始时禁用它，并在有实际脚注时启用它。它还会恢复脚注编号，并进行更广泛的测试。
\documentclass{memoir}
\pagestyle{ruled}
\setstocksize{2in}{5in} % for mwe
\settrimmedsize{2in}{5in} {*}
\setlrmarginsandblock{0.3in}{0.3in}{*}%%%%
\setulmarginsandblock{0.5in}{0.5in}{*}
\checkandfixthelayout
\fixpdflayout
\usepackage[perpage]{footmisc}
\newcommand{\biblio}[1]{%
\let\xxxx\thempfn
\let\thempfn\relax% Remove footnote number printing mechanism
\footnotetext[0]{%
\hrule%
\vspace{0.1in}%
#1}% Print footnote text
\let\thempfn\xxxx% Restore footnote number printing mechanism
}
\usepackage{bophook}
\newif\iffootnoterule
\makeatletter
\AtBeginDocument{%
\let\latex@@footnoterule\footnoterule
\renewcommand\footnoterule{%
\iffootnoterule
\latex@@footnoterule%
\else
\advance\skip\footins 4\p@\@plus2\p@\relax%
\fi
}
}
\makeatother
\let\realfootnote\footnote
\renewcommand{\footnote}[1]{%
\global\footnoteruletrue
\realfootnote{#1}
}
\AtBeginPage{%
\global\footnoterulefalse
}
\begin{document}
First page, with a biblio footnote. It should show just my hrule, and
no footnote rule.
\biblio{Bibliographic reference}
\newpage
Second page, with two ordinary footnotes. It should show the
ordinary footnote rule.
\footnote{This is an ordinary footnote.}
\footnote{This is an another.}
\newpage
Third page with two footnotes and a biblio footnote. It should show both
the footnote rule and my hrule.
\footnote{This is an ordinary footnote.}
\footnote{This is an another.}
\biblio{Bibliographic reference}
\end{document}