这是我的问题：默认情况下，我在文档中使用旧式数字，但对于标题的数字（在本例中为章节标题），我想使用内衬数字。
为此，我修改了两个命令：
\@seccntformat，我将其定义为：
\def\@seccntformat#1{{\liningNumbers\csname the#1\endcsname}\ }
我将\@sect其定义为：
\def\@sect#1#2#3#4#5#6[#7]#8{%
\ifnum #2>\c@secnumdepth%
\let\@svsec\@empty%
\else%
\refstepcounter{#1}%
\protected@edef\@svsec{\@seccntformat{#1}\relax}%
\fi%
\@tempskipa #5\relax%
\ifdim \@tempskipa>\z@%
\begingroup%
#6{%
\@hangfrom{\hskip #3\relax\@svsec}%
\interlinepenalty \@M #8\@@par%
}%
\endgroup%
\csname #1mark\endcsname{#7}%
\addcontentsline{toc}{#1}{%
\ifnum #2>\c@secnumdepth%
\else%
\protect{{\protect\liningNumbers\protect\numberline{\csname the#1\endcsname}}}% Changed line: added "\liningNumbers" to change section numbers
\fi%
#7%
}%
\else%
\def\@svsechd{%
#6{%
\hskip #3\relax%
\@svsec #8%
}%
\csname #1mark\endcsname{#7}%
\addcontentsline{toc}{#1}{%
\ifnum #2>\c@secnumdepth \else%
\protect{{\protect\liningNumbers\protect\numberline{\csname the#1\endcsname}}}% Changed line: added "\liningNumbers" to change section numbers
\fi%
#7%
}%
}%
\fi%
\@xsect{#5}%
}
其中仅更改了两行代码以在命令\liningNumbers内添加命令\addcontentsline。
显示正确，章节号也显示正确。我没有重新定义命令\thesection来包含\liningNumbers命令，因为当我在文本中引用章节号时，最好使用旧式数字来书写。
当我使用该包时，就会出现问题hyperref。使用\liningNumbers内部会改变PDF 文档中各部分的名称\addcontentsline方式。如下所示：hyperref
我有这个警告：
Package hyperref Warning: Token not allowed in a PDF string (Unicode): removing `\addfontfeatures' on input line XX.
有没有解决的办法？
以下是 MWE：
\documentclass{book}
\usepackage{fontspec, lipsum, hyperref}
\setmainfont{LibertinusSerif}[Numbers={Proportional, OldStyle}]
\newcommand{\liningNumbers}{\addfontfeatures{Numbers={Lining}}}
\makeatletter
\renewcommand\thechapter{\@Roman\c@chapter}
\renewcommand\thesection{\@arabic\c@section}
\renewcommand\thesubsection{\@alph\c@subsection}
\def\@seccntformat#1{{\liningNumbers\csname the#1\endcsname}\ }% Formatting the section number, added : "\liningNumbers"
\def\@sect#1#2#3#4#5#6[#7]#8{%
\ifnum #2>\c@secnumdepth%
\let\@svsec\@empty%
\else%
\refstepcounter{#1}%
\protected@edef\@svsec{\@seccntformat{#1}\relax}%
\fi%
\@tempskipa #5\relax%
\ifdim \@tempskipa>\z@%
\begingroup%
#6{%
\@hangfrom{\hskip #3\relax\@svsec}%
\interlinepenalty \@M #8\@@par%
}%
\endgroup%
\csname #1mark\endcsname{#7}%
\addcontentsline{toc}{#1}{%
\ifnum #2>\c@secnumdepth%
\else%
\protect{{\protect\liningNumbers\protect\numberline{\csname the#1\endcsname}}}% Changed line: added "\liningNumbers" to change section numbers
\fi%
#7%
}%
\else%
\def\@svsechd{%
#6{%
\hskip #3\relax%
\@svsec #8%
}%
\csname #1mark\endcsname{#7}%
\addcontentsline{toc}{#1}{%
\ifnum #2>\c@secnumdepth \else%
\protect{{\protect\liningNumbers\protect\numberline{\csname the#1\endcsname}}}% Changed line: added "\liningNumbers" to change section numbers
\fi%
#7%
}%
}%
\fi%
\@xsect{#5}%
}
\makeatother
\begin{document}
\tableofcontents
\chapter{Chapter one}
\section{Section I.1}
\subsection{Subsection I.1.a}
\lipsum[1-2]
\subsection{Subsection I.1.b}
\lipsum[1-2]
\section{Section I.2}
\subsection{Subsection I.2.a}
\lipsum[1-2]
\subsection{Subsection I.2.b}
\lipsum[1-2]
\end{document}
答案1
您可以定义命令，以便它在书签和文本中工作，借助\texorpdfstring
\newcommand{\liningNumbers}{\texorpdfstring{\addfontfeatures{Numbers={Lining}}}{}}
如果你不确定 hyperref 是否已加载，你可以确保\texorpdfstring已使用以下方式定义：
\providecommand\texorpdfstring[2]{#1}