\ifx \CatEscape\undefined
    \chardef\CatEscape=0
    \chardef\CatOpen=1
    \chardef\CatClose=2
    \chardef\CatIgnore=9
    \chardef\CatLetter=11
    \chardef\CatOther=12
    \chardef\CatActive=13		% is defined in Plain already

    \chardef\CatUsCode=\catcode`\_
\fi

\catcode`\_=\CatLetter			% top level macro file


\def\l@fn{%
  \hbox to \columnwidth
  {\luatexpagedir TLT\vbox{\kern -3\p@
   \hrule width .4\columnwidth \kern2.6\p@}\hfil}}
\def\r@fn{%
   \hrule width .4\columnwidth\kern 2.6\p@}


\def\@makefnmark{\hbox{$^{\hbox{\scriptsize\@thefnmark}}\m@th$}}


\def\leftfootnoterule{\global\def\footnoterule{\l@fn}}
\def\rightfootnoterule{\global\def\footnoterule{\r@fn}}
\leftfootnoterule

%%% \beginprog
\newread\old_foot_file
\newwrite\foot_file
\def\foot_file_name{\jobname.fot\relax}
\def\init_footnote{%
   \openin\old_foot_file\foot_file_name
   \ifeof\old_foot_file  \closein\old_foot_file
   \else  \closein\old_foot_file
      \read_foot_file
   \fi
   \immediate\openout\foot_file\foot_file_name
   \immediate\write\foot_file{\relax}%
   \global\let\init_footnote\relax
   }

\newcount\foot_name_no  % for generating footnote mark names





\newcount\autofootnote
\def\fnpp_next_footnote{%
    \init_footnote
    \global\advance\foot_name_no\@ne
    \global\advance\c@footnote\@ne
    \edef\do_write{%
	\immediate\write\foot_file{%
	    \string\advance\autofootnote\@ne
	    \string\expandafter\xdef
			\string\csname\space f@\number\foot_name_no \endcsname{%
		\string\number\autofootnote
		}%
	    }%
	}%
    \do_write
    \global\autofootnote 0\csname f@\number\foot_name_no \endcsname \relax
    }

\def\read_foot_file{%
   \begingroup
      \catcode`\@\CatLetter \catcode`\^^M\CatIgnore
      \input \foot_file_name
   \endgroup
   }

\let\fnpp_orig_outputpage=\@outputpage
\def\@outputpage{%
    \ifx \init_footnote\relax
	\immediate\write\foot_file{\autofootnote\z@}%
    \fi
    \fnpp_orig_outputpage
    }

\let\FnppOrigFootnote=\footnote		% save original bindings
\let\FnppOrigFootnotemark=\footnotemark

\def\footnote{%
    \@ifnextchar[%			% ] (Emacs)
	\@xfootnote
	{\fnpp_next_footnote \ifnum\autofootnote=1\rightfootnoterule\fi \@xfootnote[\the\c@footnote] %
}%
    }
\def\footnotemark{%
    \@ifnextchar[%			% ] (Emacs)
	\@xfootnotemark
	{\fnpp_next_footnote \ifnum\autofootnote=1\rightfootnoterule\fi \@xfootnotemark[\the\c@footnote]}%
    }




\def\footnotemarkLR{%
    \@ifnextchar[%			% ] (Emacs)
	\@xfootnotemark
	{\fnpp_next_footnote \ifnum\autofootnote=1\leftfootnoterule\fi\@xfootnotemark[\the\c@footnote]}%
    }


\def\Footnote#1{%
\begingroup
\footnotemarkLR%
\renewcommand{\thefootnote}{\@arabic\c@footnote}%
\luatexpardir TLT \luatextextdir TLT\footnotetext{#1}%
\endgroup
}
