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Babel 中的阿拉伯语支持弄乱了章节引用

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Babel 中的阿拉伯语支持弄乱了章节引用 
\documentclass[12pt]{book}
\usepackage[utf8]{inputenc}
\usepackage[arabic,main=english]{babel}


\begin{document}

\chapter{Introduction}
\label{ch:intro}
We talked about the second chapter \ref{ch:poly}.

\section{start}
\section{end}

\chapter{Polyglot}
\label{ch:poly}
We talked about the first chapter \ref{ch:intro}.

\section{first}
\section{second}

\end{document}

通过 babel 添加阿拉伯语支持将导致以下结果：

第 2 章被引用为第一章的最后一节

第 1 章的参考资料根本没有显示！

答案1

\@chapter对done by的重新定义有一个错误arabicore.sty；对 的重新定义也存在同样的错误\@part。

\def\@part[#1]#2{%
\addtocontents{toc}{\xstring\select@language{\main@Arabi@language}}%
\if@rl{\SAV@@part[\textRL{#1}]{\textRL{#2}}}%
\else{\SAV@@part[\textLR{#1}]{\textLR{#2}}}%
\fi} 

\def\@chapter[#1]#2{%
\addtocontents{toc}{\xstring\select@language{\main@Arabi@language}}%
\if@rl{\SAV@@chapter[\textRL{#1}]{\textRL{#2}}}%
\else{\SAV@@chapter[\textLR{#1}]{\textLR{#2}}}%
\fi}

实际情况是，\SAV@@chapter（原始\@chapter命令）在一个组中执行，因此退出该组时，\@currentlabelset by的值\refstepcounter{chapter}将丢失。实际上，\ref{ch:poly}您得到的是 1.2，这是最后由 分配的数字\section。

使固定：

\def\@part[#1]#2{%
\addtocontents{toc}{\xstring\select@language{\main@Arabi@language}}%
\if@rl\SAV@@part[\textRL{#1}]{\textRL{#2}}%
\else\SAV@@part[\textLR{#1}]{\textLR{#2}}%
\fi} 

\def\@spart#1{%
\addtocontents{toc}{\xstring\select@language{\main@Arabi@language}}%
\if@rl\SAV@spart{\textRL{#1}}%
\else\SAV@spart{\textLR{#1}}%
\fi}  

\def\@chapter[#1]#2{%
\addtocontents{toc}{\xstring\select@language{\main@Arabi@language}}%
\if@rl\SAV@@chapter[\textRL{#1}]{\textRL{#2}}%
\else\SAV@@chapter[\textLR{#1}]{\textLR{#2}}%
\fi} 

\def\@schapter#1{%
\addtocontents{toc}{\xstring\select@language{\main@Arabi@language}}%
\if@rl\SAV@schapter{\textRL{#1}}%
\else\SAV@schapter{\textLR{#1}}%
\fi}

\@spart我还更改了和的重新定义\@schapter，尽管它们实际上并没有涉及。 的其他用法\if@rl似乎并不像我修复的那样危险。

完整示例

\documentclass[12pt]{book}
\usepackage[utf8]{inputenc}
\usepackage[arabic,main=english]{babel}

\makeatletter
\def\@part[#1]#2{%
\addtocontents{toc}{\xstring\select@language{\main@Arabi@language}}%
\if@rl\SAV@@part[\textRL{#1}]{\textRL{#2}}%
\else\SAV@@part[\textLR{#1}]{\textLR{#2}}%
\fi} 

\def\@spart#1{%
\addtocontents{toc}{\xstring\select@language{\main@Arabi@language}}%
\if@rl\SAV@spart{\textRL{#1}}%
\else\SAV@spart{\textLR{#1}}%
\fi}  

\def\@chapter[#1]#2{%
\addtocontents{toc}{\xstring\select@language{\main@Arabi@language}}%
\if@rl\SAV@@chapter[\textRL{#1}]{\textRL{#2}}%
\else\SAV@@chapter[\textLR{#1}]{\textLR{#2}}%
\fi} 

\def\@schapter#1{%
\addtocontents{toc}{\xstring\select@language{\main@Arabi@language}}%
\if@rl\SAV@schapter{\textRL{#1}}%
\else\SAV@schapter{\textLR{#1}}%
\fi}  
\makeatother

\begin{document}

\chapter{Introduction}
\label{ch:intro}
We talked about the second chapter \ref{ch:poly}.

\section{start}
\section{end}

\chapter{Polyglot}
\label{ch:poly}
We talked about the first chapter \ref{ch:intro}.

\section{first}
\section{second}

\end{document}

在此处输入图片描述

答案2

这似乎解决了问题。

\documentclass[12pt]{book}
\usepackage[utf8]{inputenc}
\usepackage[arabic,english]{babel}


\begin{document}

\chapter{Introduction \label{ch:intro}}

We talked about the second chapter \ref{ch:poly}.

\section{start}
\section{end}

\chapter{Polyglot \label{ch:poly}}

We talked about the first chapter \ref{ch:intro}.

\section{first}
\section{second}

\end{document}

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