TOC fora de ordem em documentos de duas colunas

Question

Estava brincando \@outputdblcole pensei nisso:

\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}

Mas, curiosamente, embora as colunas estejam na ordem correta, o TOC está fora de ordem. Por que isso está acontecendo? e como alguém deve consertar isso? (claro, sem alterar a definição de \@outputdblcolsua forma original)?

Usando a sugestão de David Carlisle, recebo exatamente o mesmo problema:

\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}

mas este funciona bem:

\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}

Estou interessado apenas em como corrigir o TOC nos dois primeiros exemplos.

Answer 1

\shipoutfaz com que \writeos nós de gravação apareçam na lista vertical, não na ordem visual; portanto, embora você tenha trocado as colunas visualmente, \hskip-\textwidthisso não altera a ordem de gravação. Em vez de fazer isso, você não pode gerar as colunas em ordem natural, mas com diretivas para xetex (ou equivalente a luatex) para usar a configuração RTL?

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

---

Eu acho \beginRque é ocertomaneira de fazer isso (mas não funciona), então voltemos a embaralhar as caixas manualmente. Isso parece funcionar:

\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}