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Add LuaMML sockets for eqnarray #1817

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Add LuaMML sockets for eqnarray #1817

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1bfaf25
Add LuaMML sockets for eqnarray
zauguin Jul 6, 2025
4d98d8a
Support fleqn
zauguin Jul 6, 2025
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97 changes: 97 additions & 0 deletions required/latex-lab/latex-lab-math.dtx
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Original file line number Diff line number Diff line change
Expand Up @@ -2928,6 +2928,103 @@
% \end{macrocode}
% \end{macro}
%
% \begin{macro}[no-user-doc]{\eqnarray}
% \begin{macro}[no-user-doc]{\endeqnarray}
% For MathML generation in eqnarray we also need to add some sockets.
% \begin{macrocode}
%<@@=>
\def\eqnarray{%
\stepcounter{equation}%
\def\@currentlabel{\p@equation\theequation}%
\def\@currentcounter{equation}%
\global\@eqnswtrue
\m@th
\global\@eqcnt\z@
\tabskip\@centering
\let\\\@eqncr
\dollardollar@begin\everycr{}\halign to\displaywidth\bgroup
\hskip\@centering
$\displaystyle\tabskip\z@skip{##}%
\UseTaggingSocket{math/luamml/save/nNn}{{}\displaystyle {mtd}}%
$%
\UseTaggingSocket{math/luamml/mtable/finalizecol}{last}%
\@eqnsel
&\global\@eqcnt\@ne\hskip \tw@\arraycolsep \hfil${##}%
\UseTaggingSocket{math/luamml/save/nNn}{{}\displaystyle {mtd}}%
$%
\UseTaggingSocket{math/luamml/mtable/finalizecol}{last}%
\hfil
&\global\@eqcnt\tw@ \hskip \tw@\arraycolsep $\displaystyle{##}%
\UseTaggingSocket{math/luamml/save/nNn}{{} \displaystyle {mtd}}%
$%
\UseTaggingSocket{math/luamml/mtable/finalizecol}{last}%
\hfil\tabskip\@centering
&\global\@eqcnt\thr@@ \hb@xt@\z@\bgroup\hss##\egroup
\UseTaggingSocket{math/luamml/mtable/tag/set}
\tabskip\z@skip
\cr
}
\def\endeqnarray{%
\@@eqncr
\UseExpandableTaggingSocket{math/luamml/mtable/finalize} {eqnarray}%
\egroup
\global\advance\c@equation\m@ne
\dollardollar@end\@ignoretrue
}
\AddToHook{file/fleqn.clo/after}{
\renewenvironment{eqnarray}{%
\stepcounter{equation}%
\def\@currentlabel{\p@equation\theequation}%
\def\@currentcounter{equation}%
\global\@eqnswtrue\m@th
\global\@eqcnt\z@
\tabskip\mathindent
\let\\=\@eqncr
\setlength\abovedisplayskip{\topsep}%
\ifvmode
\addtolength\abovedisplayskip{\partopsep}%
\fi
\addtolength\abovedisplayskip{\parskip}%
\setlength\belowdisplayskip{\abovedisplayskip}%
\setlength\belowdisplayshortskip{\abovedisplayskip}%
\setlength\abovedisplayshortskip{\abovedisplayskip}%
\dollardollar@begin\everycr{}\halign to\linewidth%
\bgroup
\hskip\@centering
$\displaystyle\tabskip\z@skip{##}%
\UseTaggingSocket{math/luamml/save/nNn}{{} \displaystyle {mtd}}%
$%
\UseTaggingSocket{math/luamml/mtable/finalizecol}{last}%
\@eqnsel&%
\global\@eqcnt\@ne \hskip \tw@\arraycolsep \hfil${##}%
\UseTaggingSocket{math/luamml/save/nNn}{{} \displaystyle {mtd}}%
$%
\UseTaggingSocket{math/luamml/mtable/finalizecol}{last}%
\hfil&%
\global\@eqcnt\tw@ \hskip \tw@\arraycolsep $\displaystyle{##}%
\UseTaggingSocket{math/luamml/save/nNn}{{} \displaystyle {mtd}}%
$%
\UseTaggingSocket{math/luamml/mtable/finalizecol}{last}%
\hfil \tabskip\@centering&%
\global\@eqcnt\thr@@
\hb@xt@\z@\bgroup\hss##\egroup
\UseTaggingSocket{math/luamml/mtable/tag/set}
\tabskip\z@skip\cr
}%
{%
\@@eqncr
\UseExpandableTaggingSocket{math/luamml/mtable/finalize} {eqnarray}%
\egroup
\global\advance\c@equation\m@ne
\dollardollar@end
\@ignoretrue
}
}
%<@@=math>
% \end{macrocode}
% \end{macro}
% \end{macro}
%
% \subsection{Disable math grabbing in the begindocument hook}
% For example amsart uses math to measure text there.
%
Expand Down