2 列のドキュメントで目次が順序どおりに表示されない

Question

遊んで\@outputdblcolいたらこんなものができました:

\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}

しかし興味深いことに、列の順序は正しいのに、目次は順序が間違っています。なぜこのようなことが起こるのでしょうか? また、どのように修正すればよいのでしょうか? (もちろん、定義を\@outputdblcol元の形式に変更せずに)?

David Carlisle の提案を使用すると、まったく同じ問題が発生します。

\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}

しかし、これは問題なく動作します:

\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}

最初の 2 つの例で TOC を修正する方法にのみ興味があります。

Answer 1

\shipout\writeは、視覚的な順序ではなく、書き込みノードが垂直リストに表示される順序で実行されます。そのため、視覚的に列を入れ替えても\hskip-\textwidth、書き込み順序は変わりません。代わりに、列を自然な順序で出力するのではなく、RTL 設定を使用するように xetex (または luatex と同等のもの) に指示することはできますか?

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

---

\beginR私が思うに右これを行う方法はありませんが (ただし、うまくいきません)、手動でボックスをシャッフルすることになります。これはうまくいくようです:

\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}