兩列文檔中的 TOC 順序不正確

Question

我正在玩\@outputdblcol，我想出了這個：

\documentclass[twocolumn]{article}

\makeatletter
\def\@outputdblcol{%
  \if@firstcolumn
    \global \@firstcolumnfalse
    \global \setbox\@leftcolumn \box\@outputbox
  \else
    \global \@firstcolumntrue
    \setbox\@outputbox \vbox {%
                         \hb@xt@\textwidth {%
                          \hskip\columnwidth
                                                     \hfil
                           {\normalcolor\vrule \@width\columnseprule}%
                           \hfil
                           \hb@xt@\columnwidth {%
                             \box\@outputbox \hss}%
\hskip-\textwidth
                           \hb@xt@\columnwidth {%
                             \box\@leftcolumn \hss}%
                             \hskip\columnwidth \hskip\columnsep
                                             }%
                              }%
    \@combinedblfloats
    \@outputpage
    \begingroup
      \@dblfloatplacement
      \@startdblcolumn
      \@whilesw\if@fcolmade \fi
        {\@outputpage
         \@startdblcolumn}%
    \endgroup
  \fi
}
\makeatother
\pagestyle{headings}


\begin{document}
\tableofcontents
\section{Correct Headings}          
Some useless text that we are provingin Some useless text that we are provingin Some useless text that we are provingin Some useless text that we are provingin
\section{Part}      
Some useless text that we are provingin 
\newpage                         
\section{Wrong Headings}          
Some useless text that we are provingin
\section{Another Part}        
Some useless text that we are provingin 
\section{LAst Part}  
Some useless text that we are provingin
\end{document}

但有趣的是，即使列的順序正確，但目錄卻亂序。為什麼會發生這種情況？以及應該如何解決它？ （當然不改變\@outputdblcol其原始形式的定義）？

使用大衛卡萊爾的建議，我遇到了完全相同的問題：

\documentclass[twocolumn]{article}
\TeXXeTstate=1
\makeatletter
\def\@outputdblcol{%
  \if@firstcolumn
    \global \@firstcolumnfalse
    \global \setbox\@leftcolumn \box\@outputbox
  \else
    \global \@firstcolumntrue
    \setbox\@outputbox \vbox {%
                         \hb@xt@\textwidth {\beginR%
                           \hb@xt@\columnwidth {%
                             \box\@leftcolumn \hss}%
                           \hfil
                           {\normalcolor\vrule \@width\columnseprule}%
                           \hfil
                           \hb@xt@\columnwidth {%
                             \box\@outputbox \hss}%
                                             \endR}%
                              }%
    \@combinedblfloats
    \@outputpage
    \begingroup
      \@dblfloatplacement
      \@startdblcolumn
      \@whilesw\if@fcolmade \fi
        {\@outputpage
         \@startdblcolumn}%
    \endgroup
  \fi
}
\makeatother
\pagestyle{headings}


\begin{document}
\tableofcontents
\section{Correct Headings}          
Some useless text that we are provingin Some useless text that we are provingin Some useless text that we are provingin Some useless text that we are provingin
\section{Part}      
Some useless text that we are provingin 
\newpage                         
\section{Wrong Headings}          
Some useless text that we are provingin
\section{Another Part}        
Some useless text that we are provingin 
\section{LAst Part}  
Some useless text that we are provingin
\end{document}

但這一個工作正常：

\documentclass[twocolumn]{article}
\TeXXeTstate=1
\makeatletter
\def\@outputdblcol{%
  \if@firstcolumn
    \global \@firstcolumnfalse
    \global \setbox\@leftcolumn \box\@outputbox
  \else
    \global \@firstcolumntrue
    \setbox\@outputbox \vbox {%
                         \hb@xt@\textwidth {%
                          \hskip\columnwidth
                                                     \hfil
                           {\normalcolor\vrule \@width\columnseprule}%
                           \hfil
                           \hb@xt@\columnwidth {%
                             \box\@leftcolumn \hss}%
                             \hskip-\textwidth
                           \hb@xt@\columnwidth {%
                             \box\@outputbox \hss}%
                                          \hskip\columnwidth\hskip\columnsep   }%
                              }%
    \@combinedblfloats
    \@outputpage
    \begingroup
      \@dblfloatplacement
      \@startdblcolumn
      \@whilesw\if@fcolmade \fi
        {\@outputpage
         \@startdblcolumn}%
    \endgroup
  \fi
}
\makeatother
\pagestyle{headings}


\begin{document}
\tableofcontents
\section{Correct Headings}          
Some useless text that we are provingin Some useless text that we are provingin Some useless text that we are provingin Some useless text that we are provingin
\section{Part}      
Some useless text that we are provingin 
\newpage                         
\section{Wrong Headings}          
Some useless text that we are provingin
\section{Another Part}        
Some useless text that we are provingin 
\section{LAst Part}  
Some useless text that we are provingin
\end{document}

我只對如何修復前兩個範例中的 TOC 感興趣。

Answer 1

\shipout使\write寫入節點按照垂直列表中出現的順序，而不是按照視覺順序，因此，當您在視覺上交換列時，\hskip-\textwidth這不會改變寫入順序。您可以不這樣做，而是不按自然順序輸出列，而是使用 xetex （或 luatex 等效項）指令來使用 RTL 設定嗎？

\hb@xt@\textwidth {\beginR%
    ..

---

我認為\beginR是正確的這樣做的方法（但它不起作用）所以回到手動洗牌。這似乎有效：

\documentclass[twocolumn]{article}

\setlength\columnseprule{1pt}

\makeatletter
\TeXXeTstate=1
\makeatletter
\def\@outputdblcol{%
  \if@firstcolumn
    \global \@firstcolumnfalse
    \global \setbox\@leftcolumn \box\@outputbox
  \else
    \global \@firstcolumntrue
    \setbox\@outputbox \vbox {%
                         \hb@xt@\textwidth {%
                           \kern\textwidth\llap{\hb@xt@\columnwidth {%
                             \box\@leftcolumn \hss}}%
                           \kern-\textwidth
                           \rlap{\hb@xt@\columnwidth {%
                             \box\@outputbox \hss}}%
                           \hfil
                           {\normalcolor\vrule \@width\columnseprule}%
                           \hfil                       
                                             }%
                              }%
    \@combinedblfloats
    \@outputpage
    \begingroup
      \@dblfloatplacement
      \@startdblcolumn
      \@whilesw\if@fcolmade \fi
        {\@outputpage
         \@startdblcolumn}%
    \endgroup
  \fi
}

\makeatother
\pagestyle{headings}


\begin{document}
\tableofcontents
\section{Correct Headings}          
Some useless text that we are provingin Some useless text that we are provingin Some useless text that we are provingin Some useless text that we are provingin
\section{Part}      
Some useless text that we are provingin 
\newpage                         
\section{Wrong Headings}          
Some useless text that we are provingin
\section{Another Part}        
Some useless text that we are provingin 
\section{LAst Part}  
Some useless text that we are provingin
\end{document}