\Configure{footnote-mark}
{\ifmathltx \ifmtext \else
\HCode{<mrow \mml:class="footnote-mark">}\fi
\else \HCode{<span class="footnote-mark">}\fi }
{\ifmathltx \ifmtext \else \HCode{</mrow>}\fi
\else \HCode{</span>}\fi }
\Configure{thank-mark}
{\HCode{<\ifmathltx mrow \expandafter\mml:class\else span class\fi
="thank-mark">}}
{\HCode{</\ifmathltx mrow\else span\fi>}}
-_-_-
The following code segments handle the different listed cases, with possible
exception of the last.
a\footnote{b c}
$a\footnote{b c}$
$a\footnote{\hbox{b c}}$
$a\footnote{\mbox{b c}}$
$a\mbox{\footnote{b c}}$
We have the following hooks
\def\@footnotemark{...\a:@makefnmark\@makefnmark
\b:@makefnmark...}
\long\def\@footnotetext#1{...\a:footnote-text\a:@makefntext
\@makefntext{\b:@makefntext
\a:@makefnbody #1\b:@makefnbody
}\c:@makefntext\b:footnote-text...}
\:CheckOption{fn-in}\if:Option \else
\expandafter\let\csname A:footnote-text\expandafter\endcsname
\csname a:footnote-text\endcsname
\expandafter\let\csname B:footnote-text\expandafter\endcsname
\csname b:footnote-text\endcsname
\NewConfigure{footnote-text}[2]{%
\expandafter\def\csname a:footnote-text\endcsname{%
#1%
\ifmathltx
\HCode{<\a:@math\Hnewline
\csname a:math-xmlns\endcsname \Hnewline >%
\ifmtext <mtext>\fi}
\fi
\ifmathltx \fi
}%
\expandafter\def\csname b:footnote-text\endcsname{%
\ifmathltx
\HCode{\ifmtext</mtext>\fi </\a:@math>}%
\fi
#2%
}%
}
\Configure{footnote-text}
{\csname A:footnote-text\endcsname}
{\csname B:footnote-text\endcsname}
\fi
-_-_-
\let\A:footnotetext=\a:footnotetext
\let\B:footnotetext=\b:footnotetext
\let\C:footnotetext=\c:footnotetext
\NewConfigure{footnotetext}[3]{%
\def\a:footnotetext{%
\ifmathltx \ifmtext <.end mtext space.>\fi\fi
#1%
\ifmathltx \ifmtext <.end mtext space.>\fi\fi
}%
\def\b:footnotetext{%
\ifmathltx \ifmtext <.end mtext space.>\fi\fi
#2%
\ifmathltx \ifmtext <.end mtext space.>\fi\fi
}%
\def\c:footnotetext{%
\ifmathltx \ifmtext <.end mtext space.>\fi\fi
#3%
\ifmathltx \ifmtext <.start mtext space.>\fi\fi
}%
}
\Configure{footnotetext}
{\A:footnotetext}
{\B:footnotetext}
{\C:footnotetext} -_-_-
\Configure{footnotebody}
{\tmp:toks=}
{\ifmathltx \ifmmode $\mbox{$\the\tmp:toks$}$
\else $\mbox{\the\tmp:toks}$\fi
\else \the\tmp:toks\fi}
-_-_-