path: root/Master/texmf-dist/source/fontinst/base/fisource.sty

% \iffalse
%
% Copyright 1999, 2000 the fontinst maintenance team and any individual 
% authors listed elsewhere in this file.  All rights reserved.
% 
% This file is part of the fontinst system version 1.9.
% -----------------------------------------------------
% 
% It may be distributed under the terms of the LaTeX Project Public
% License, as described in lppl.txt in the base LaTeX distribution.
% Either version 1.1 or, at your option, any later version.
% 
% \fi
% 
% \title{The \package{fisource} package}
% \author{Lars Hellstr\"om}
% \maketitle
% 
%    \begin{macrocode}
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{fisource}%
   [2003/03/29 v2.16 Fontinst source documentation commands]
%    \end{macrocode}
% 
% \section{Option processing}
% 
% \begin{option}{warnfinale}
%   \changes{2.01}{2000/07/06}{Option added. (LH)}
%   Under development I find it quite a nuisance that |\Finale| raises 
%   an error if the checksum isn't correct; a warning feels more 
%   appropriate. Therefore the \texttt{warnfinale} option redefines 
%   |\check@checksum| to emit a warning instead.
%    \begin{macrocode}
\DeclareOption{warnfinale}{%
   \@ifpackageloaded{doc}\@firstofone\AtEndOfPackage {%
      \def\check@checksum{\relax
         \ifnum\check@sum=\z@
            \typeout{**********************************}%
            \typeout{* This macro file has no checksum!}%
            \typeout{* The checksum should be \the\bslash@cnt!}%
            \typeout{**********************************}%
         \else\ifnum \check@sum=\bslash@cnt
            \typeout{*******************}%
            \typeout{* Checksum passed *}%
            \typeout{*******************}%
         \else
             \PackageWarning{doc}{Checksum not passed 
                        (\the\check@sum<>\the\bslash@cnt)}%
         \fi\fi
         \global\check@sum\z@
      }%
   }%
}
%    \end{macrocode}
% \end{option}
% 
% All other options are passed on to \package{xdoc}.
%    \begin{macrocode}
\DeclareOption*{\PassOptionsToPackage{\CurrentOption}{xdoc2}}
\ProcessOptions\relax
%    \end{macrocode}
% 
% \changes{2.00}{2000/07/06}{Use \package{xdoc1}. (LH)}
% \changes{2.02}{2000/07/15}{Use \package{xdoc2}. (LH)}
% \changes{2.10}{2001/02/27}{Use \package{docidx2e}. (LH)}
%    \begin{macrocode}
\RequirePackage{xdoc2,docidx2e}
%    \end{macrocode}
% 
% \section{Miscellanea}
% 
%    \begin{macrocode}
\CodelineIndex
\setcounter{IndexColumns}{2}
\setcounter{tocdepth}{2}
\DeclareRobustCommand\package[1]{\textsf{#1}}
\DeclareRobustCommand\eTeX{\(\varepsilon\)-\kern-.125em\TeX}
%    \end{macrocode}
% 
% \begin{macro}{\AllTeX}
%   \changes{2.13}{2001/08/26}{Command added. (LH)}
% \begin{macro}{\La}
%   The |\AllTeX| command is for writing `(La)TeX' (but nicer). The 
%   definition is taken from \texttt{tugboat.dtx}.
%    \begin{macrocode}
\newcommand{\La}{%
   L\kern-.36em
   {%
      \setbox0\hbox{T}%
      \vbox to\ht0{\hbox{%
         $\m@th$\csname S@\f@size\endcsname
         \fontsize\sf@size\z@\math@fontsfalse\selectfont
         A%
      }\vss}%
   }%
}
\DeclareRobustCommand\AllTeX{(\La\kern-.075em)\kern-.075em\TeX}
%    \end{macrocode}
% \end{macro}\end{macro}
% 
% \begin{macro}{\missing}
%   \changes{2.10}{2001/02/27}{Redefined using 
%      \cs{NewDescribeCommand}. (LH)}
%    \begin{macrocode}
\NewDescribeCommand\missing{%
   \XD@grab@marg\XD@grab@harmless@cs
}{2}{%
   \GenericDescribePrint{\small Not in \texttt{#1}: 
      \texttt{\Bslash#2}}%
   \MakeSortKey\@tempa{#2}{}%
   \IndexEntry{%
      \LevelSorted{Not in #1:}{Not in \texttt{#1}:}%
      \LevelSorted{\@tempa}{\texttt{\Bslash#2}}%
   }{usage}{\thepage}%
}
% \newcommand\missing[2]{%
%    \marginpar{%
%       \raggedleft\leavevmode\strut 
%       Not in \texttt{#1}: \texttt{\string#2}\strut
%       \index{Not in #1\actualchar Not in \string\texttt{#1}\levelchar
%          \string#2\actualchar\string\verb\verbatimchar
%          \string#2\verbatimchar\encapchar usage}%
%    }%
% }
%    \end{macrocode}
% \end{macro}
% 
%    \begin{macrocode}
\newcommand\ambiguity[1]{\leavevmode
   \textbf{#1\index{Ambiguity\encapchar usage}}%
   \marginpar{\raggedleft\textbf{\huge A}}%
}
\newcommand\question[1]{\leavevmode
   \textbf{#1\index{Question\encapchar usage}}%
   \marginpar{\raggedleft\textbf{\huge ?}}%
}
\AtBeginDocument{\catcode`\_=11}
\def\MakePrivateLetters{\catcode`\_=11\makeatletter}

%    \end{macrocode}
% 
% \multchanges{\cs{meta}}{1.30}{2000/01/02}{\cs{Meta} command (robust 
%    wrapper around \package{doc}'s \cs{meta}) added. (LH)}
% \multchanges{\cs{meta}}{1.31}{2000/02/10}{Command redefined so that 
%    it is robust itself. \cs{Meta} removed. (LH)}
% \multchanges{\cs{meta@font@select}}{1.33}{2000/02/26}{Macro added. 
%    (LH)}
% \multchanges{\cs{meta}}{1.35}{2000/03/25}{Don't make \cs{setlanguage} 
%    whatsits in restricted horizontal mode. (LH)}
% \multchanges{\cs{meta}}{2.00}{2000/07/06}{Command definition removed, 
%    since the command is already defined by \package{doc} or 
%    \package{xdoc}. (LH)}
% 
% \begin{macro}{\cs}
%   This is \package{ltxdoc}'s normal |\cs|, but with a twist to make 
%   |\meta| produce better results when used in the argument.
%   \changes{1.33}{2000/02/26}{Redefinition added. (LH)}
%   \changes{2.00}{2000/07/06}{Use \cs{MetaNormalfont} and 
%      \cs{PrintVisibleChar}. (LH)}
%    \begin{macrocode}
\DeclareRobustCommand\cs[1]{%
   \texttt{\MetaNormalfont\PrintVisibleChar{`\\}#1}%
}
%    \end{macrocode}
% \end{macro}
% 
% \begin{environment}{isyntax}
%   |isyntax| is for ``informal'' syntax specifications, such as
%   \begin{quote}
%     A \meta{varchar command} can be one of\\
%     \begin{quote}
%       |\vartop|\marg{glyph}\\
%       |\varmid|\marg{glyph}\\
%       |\varbot|\marg{glyph}\\
%       |\varrep|\marg{glyph}
%     \end{quote}
%   \end{quote}
%   The implementation is based on that of the \texttt{verse} 
%   environment.It usually works just as fine with \texttt{quote}, but 
%   \texttt{isyntax} handles breaking long lines better (and more 
%   elegantly).
%   \changes{1.37}{2000/05/14}{Increased \cs{rightskip} stretchability 
%      and added setting of \cs{linepenalty}. (LH)}
%    \begin{macrocode}
\newenvironment{isyntax}{%
   \let\\\@centercr
   \list{}{%
      \itemsep \z@
      \itemindent -1.5em%
      \listparindent \itemindent
      \advance \leftmargin 1.5em%
   }%
   \advance \rightskip \z@\@plus0.7\linewidth \relax
   \linepenalty=100\relax
   \item\relax
}{\endlist}
%    \end{macrocode}
% \end{environment}
%
% \begin{environment}{obsoletemacro}
%   \changes{2.00}{2000/07/06}{Environment removed since obsolete. (LH)}
%   The \texttt{obsoletemacro} environment is for getting the right 
%   heading on |\changes| comments that refer to macros which have been 
%   removed. It only updates the |\saved@macroname|.
%    \begin{macrocode}
% \newenvironment{obsoletemacro}{\begingroup
%    \catcode`\\12
%    \MakePrivateLetters
%    \obsolete@macro
% }{}
% \def\obsolete@macro#1{\endgroup
%    \edef\saved@macroname{\string#1}%
% }
%    \end{macrocode}
% \end{environment}
% 
% 
% \section{\texttt{macro}-like environments}
% 
% This subsection contains the definitions of a couple of environments 
% that, like \package{doc}'s \texttt{environment}, are for marking up the 
% document (what is defined and where). The definitions of these 
% environments are identical to that of \texttt{environment}, except 
% that the index entry texts are a little different.
% 
% This section got a lot shorter in v\,2.00 thanks to \package{xdoc}.
% 
% \begin{environment}{fiinteger}
% \begin{environment}{fistring}
%   \multchanges{\notcs{\texttt{fiinteger} environment}^^A
%      \notcs{\texttt{fistring} environment}}{2.03}{2000/07/24}^^A
%      {Swapped last two arguments of \cs{NewMacroEnvironment} call 
%       since \package{xdoc} changed.}
%    \begin{macrocode}
\NewMacroEnvironment{fiinteger}{\XD@grab@harmless\relax}{1}%
   {\MacroFont#1 \normalfont integer}%
   {\XDMainIndex{\levelsorted{#1 I}{\texttt{#1} (integer)}}%
    \XDMainIndex{\levelsame{integers:}\levelsorted{#1}{\texttt{#1}}}}%
   {{#1}{\texttt{#1} integer}}{}
%    \end{macrocode}
%    \begin{macrocode}
\NewMacroEnvironment{fistring}{\XD@grab@harmless\relax}{1}%
   {\MacroFont#1 \normalfont string}%
   {\XDMainIndex{\levelsorted{#1 S}{\texttt{#1} (string)}}%
    \XDMainIndex{\levelsame{strings:}\levelsorted{#1}{\texttt{#1}}}}%
   {{#1}{\texttt{#1} string}}{}
%    \end{macrocode}
% \end{environment}\end{environment}
% 
% \begin{environment}{PLproperty}
%   \changes{2.04}{2000/11/03}{Environment added. (LH)}
%   \changes{2.11}{2001/03/16}{Added \cs{DoNotIndexHarmless}. (LH)}
%   The \texttt{PLproperty} environment is for marking up definitions 
%   of macros for interpreting properties in (V)PL files.
%    \begin{macrocode}
\NewMacroEnvironment{PLproperty}{\XD@grab@harmless\relax}{1}%
   {\MacroFont#1 \normalfont property}%
   {\XDMainIndex{\levelsorted{#1}{\texttt{\Bslash#1}}}%
    \XDMainIndex{%
       \levelsame{PL properties:}\levelsorted{#1}{\texttt{#1}}%
   }}%
   {{#1}{\texttt{\Bslash#1}}}%
   {\DoNotIndexHarmless{#1}}
%    \end{macrocode}
% \end{environment}
% 
% \begin{environment}{numPLproperty}
%   \changes{2.11}{2001/03/17}{Environment added. (LH)}
%   The \texttt{numPLproperty} environment is for marking up definitions 
%   of macros that interpret a numbered family of (V)PL file properties, 
%   such as \texttt{NUM} for \texttt{NUM1}, \texttt{NUM2}, and 
%   \texttt{NUM3}. The syntax is
%   \begin{quote}
%     |\begin{numPLproperty}|\marg{base}\marg{num-list}
%   \end{quote}
%   In the above case the \meta{base} would be \texttt{NUM}. The 
%   \meta{num-list} is a comma-separated list of digits (no existing 
%   family of numbered properties have more than 5 members) that 
%   specify what members of the family are handled by the macro being 
%   defined.
%    \begin{macrocode}
\NewMacroEnvironment{numPLproperty}{%
   \XD@grab@harmless\relax\XD@grab@marg
}{2}%
   {\MacroFont#1$*$ \normalfont properties}%
   {\XDMainIndex{\levelsorted{#1}{\texttt{\Bslash#1}}}%
    \@for\@tempa:=#2\do{%
       \XDMainIndex{%
          \levelsame{PL properties:}%
          \levelsorted{#1\@tempa}{\texttt{#1\@tempa}}%
       }%
   }}%
   {{#1}{\texttt{\Bslash#1}}}%
   {\DoNotIndexHarmless{#1}}
%    \end{macrocode}
% \end{environment}
% 
% 
% \multchanges{\notcs{\texttt{switch} environment}}{2.00}{2000/07/06}
%    {Removed since defined in \package{xdoc}. (LH)}
% 
% 
% \section{Changes of change history formating}
% 
% \multchanges{\cs{@changes}}{2.00}{2000/07/06}{Redefinition removed 
%    since already done in \package{xdoc}. (LH)}
% 
% \begin{macro}{\multchanges}
%   \changes{1.32}{2000/02/22}{\cs{flushleftspace} between \cs{cs} 
%      items when typeset, instead of space. (LH)}
%   \changes{1.34}{2000/03/11}{\cs{notcs} marker allowed in 
%      \meta{commands}. (LH)}
%   \changes{2.16}{2003/03/29}{Modified macro so that it is based on
%      \cs{changes@}. This means it is now compatible with \cs{uintver}. 
%      (LH)}
%   The |\multchanges| commands is used to record a change to several 
%   macros. Its syntax is
%   \begin{quote}
%     |\multchanges|\marg{commands}\marg{version}\marg{date}^^A
%       \marg{description}
%   \end{quote}
%   The three last arguments are as the arguments of |\changes|. The 
%   \meta{commands} should be a nonempty sequence of commands, each 
%   command either a |\cs| or a |\notcs|, and each command with one 
%   argument. The change history entry generated by a 
%   |\multchanges| will be for all the macros (or whatever) listed in 
%   the first argument. |\cs| items will be typeset in typewriter font 
%   with a leading backslash, whereas |\notcs| items will receive no 
%   such special formatting.
%   
%   This method may have problems with active characters (since I've 
%   ignored some things the standard |\changes| do to accomodate these), 
%   but luckily \package{fontinst} hardly uses active characters 
%   anyway. Furthermore I don't think the \package{doc} way of dealing 
%   with them would be the right way here. Perhaps an active character 
%   should rather be entered in the \meta{commands} argument as 
%   |\active|\marg{code} or something?
%    \begin{macrocode}
\newcommand*\multchanges[4]{%
   \@bsphack
   \begingroup
   \begingroup
      \def\cs##1{,\space##1}%
      \let\notcs=\cs
      \protected@xdef\@gtempa{%
         \expandafter\@gobbletwo#1\@empty\@empty\@empty
      }%
      \edef\cs{,\noexpand\flushleftspace
         \noexpand\protect
         \expandafter\noexpand\csname cs \endcsname
      }%
      \def\notcs##1{,\noexpand\flushleftspace ##1}%
      \protected@xdef\@gtempa{%
         {\@gtempa}%
         {\expandafter\@gobbletwo#1\@empty\@empty\@empty}%
      }%
   \endgroup
   \let\saved@macroname=\@gtempa
   \changes@{#2}{#3}{#4}%
}
%    \end{macrocode}
% \end{macro}
% 
% \begin{macro}{\flushleftspace}
%   The |\flushleftspace| command should typeset something which looks 
%   like a space when not broken at, and as an \texttt{3em plus 1fil} 
%   space when broken at. It also have to survive its use in 
%   |\multchanges|.
%   \changes{1.32}{2000/02/22}{Command added. (LH)}
%   \changes{1.38}{2000/06/05}{Modified finite penalty. (LH)}
%    \begin{macrocode}
\DeclareRobustCommand\flushleftspace{%
   \nobreak \hskip 3em\@plus 1fil%
   \penalty\@m \hskip -3em\@plus -1fil\ %
}
%    \end{macrocode}
% \end{macro}
% 
% \begin{macro}{\labelednumber}
%   This \package{xdoc} macro is redefined to put a ``filbreak'' 
%   space before every page number labelled with a macro name.
%   \changes{2.16}{2003/03/29}{Redefinition added. (LH)}
%    \begin{macrocode}
\renewcommand*\labelednumber[2]{%
   \hskip -1em\@plus -8em%
   \vadjust{}\hskip 1em\@plus 8em%
   #2\nolinebreak[2] (#1)%
}
%    \end{macrocode}
% \end{macro}
% 
% \begin{environment}{theglossary}
%    \begin{macrocode}
% \ifhave@multicol
%   \renewenvironment{theglossary}{%
%     \begin{multicols}\c@GlossaryColumns
%                      [\glossary@prologue][\GlossaryMin]%
%     \GlossaryParms \def\item{\@idxitem v\,}\ignorespaces}%
%    {\end{multicols}}
% \else
%   \renewenvironment{theglossary}{%
%       \@restonecoltrue\if@twocolumn\@restonecolfalse\fi
%       \columnseprule \z@  \columnsep 35\p@
%       \twocolumn[\glossary@prologue]%
%       \GlossaryParms \def\item{\@idxitem v\,}\ignorespaces}
%     {\if@restonecol\onecolumn\else\clearpage\fi}
% \fi
%    \end{macrocode}
% 
%   If we want to use the glossary for some other information as well 
%   (here I am thinking primarily on collecting |\missing| notices) then 
%   perhaps we should insert the |v\,| in |\changes| instead. I would 
%   guess the 64 character limit isn't at all as usual as it was when 
%   the doc package documentation was written.
%   
%    \begin{macrocode}
% \renewenvironment{theglossary}{%
% %     \penalty\z@\vskip\GlossaryMin\@plus\z@\@minus\GlossaryMin
% %     \penalty\z@\vskip-\GlossaryMin\@plus\z@\@minus-\GlossaryMin
%     \glossary@prologue
%     \GlossaryParms \let\item\@idxitem \ignorespaces
% }{\par\bigskip}
%    \end{macrocode}
%   On second thoughts, the changes should be printed in one column. 
%   They're usually very hard to linebreak in narrow columns.
% \end{environment}
% 
% \begin{macro}{\firstsubsubitem}
%   The idea with |\firstsubsubitem| is that it should be like |\efill| 
%   |\subsubitem| if the paragraph is ended by a |\subsubitem| and like 
%   \verb*"\ " if it isn't. This is achieved by grabbing the paragraph 
%   into a macro and then prepend some suitable material to it when 
%   typesetting.
%   \changes{1.36}{2000/04/10}{Grabbing paragraph as list of tokens, 
%      rather than typeset text. (LH)} 
%    \begin{macrocode}
% \newcommand\firstsubsubitem{%
%    \begingroup
%    \let\par\@fssi@par
%    \let\subsubitem\@fssi@subsubitem
%    \protected@edef\@tempa{\iffalse}\fi
% }
%    \end{macrocode}
%    \begin{macrocode}
% \def\@fssi@subsubitem{%
%    \iffalse{\fi}%
%    \nobreak\hfill\vadjust{\nobreak}%
%    \penalty-\@M\vadjust{\penalty\@m}\nobreak\hskip -5pt\relax
%    \@tempa
%    \endgroup
%    \subsubitem
% }
%    \end{macrocode}
%   \multchanges{\cs{@fssi@par}}{2000/06/05}{1.38}{Replaced simple space 
%      by a more complicated sequence of penalties, vadjusts, and glue, 
%      to make it more like \cs{flushleftspace}. (LH)}
%    \begin{macrocode}
% \def\@fssi@par{%
%    \iffalse{\fi}%
%    \nobreak \hskip \z@ \@plus 0.4\linewidth
%    \vadjust{\nobreak}%
%    \penalty500\hskip \z@ \@plus -0.4\linewidth\hskip 5pt\relax
%    \penalty\z@\ \vadjust{\penalty\@m}%
%    \nobreak\hskip -5pt\relax
%    \@tempa
%    \endgroup
%    \par
% }
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\GlossaryParms}
%    \begin{macrocode}
% \def\GlossaryParms{%
%    \parindent \z@
%    \columnsep 15pt
%    \parskip 0pt plus 1pt
%    \rightskip 15pt plus 15pt
%    \mathsurround \z@
%    \parfillskip=-\rightskip
%    \pretolerance=\tolerance
%    \small
%    \def\@idxitem{\par\hangindent 30pt v\,}%
%    \def\subitem{\par\hangindent 30pt\hspace*{15pt}}%
%    \def\subsubitem{\par\hangindent 30pt\hspace*{25pt}}%
%    \def\indexspace{\par\vspace{10pt plus 2pt minus 3pt}}%
% }
%    \end{macrocode}
% \end{macro}
% 
% \begin{instance}{docindex}{changes}
%   \changes{2.10}{2001/02/27}{Redefining it. (LH)}
%   \changes{2.12}{2001/03/25}{Modified in the same way as the 
%      \package{docindex} default was with v\,1.00. (LH)}
%   \changes{2.15}{2003/02/19}{Rewrote this redefinition. Something
%      was wrong with the old one, but it seems to have worked to 
%      start again from the definition in \package{docindex}. (LH)}
%   \changes{2.16}{2003/03/29}{Added an insertion of `\texttt{v}\cs{,}' 
%      to the version number headings. The way it is done is however a 
%      hack; I should define a separate instance explicitly instead. 
%      (LH)}
%    \begin{macrocode}
\setcounter{GlossaryColumns}{1}
\@namedef{TP@I{}{docindex}{changes}}#1#2{%
   \begingroup
   \def\DI@indexitem@i##1##2##3##4{%
      \UseInstance{indexitem}{fixed1}{##1}{##2}{v\,##3}{##4}%
   }%
   \@letinstance\DI@indexitem@ii{indexitem}{fixed-r2a-nocomma}%
   \@letinstance\DI@indexitem@iii{indexitem}{aloneaccept3}%
   \columnsep=10pt%
   \parskip=0pt plus 1pt%
   \def\DI@letter@skip{\z@skip}%
   \let\DI@letter@format\@gobble
   \def\+{-}%
   \IfFileExists{\jobname.gls}{%
      \ifnum \c@GlossaryColumns>\@ne
         \begin{multicols}{\c@GlossaryColumns}[#1][\GlossaryMin]%
      \else
         \enough@room{\GlossaryMin}%
         #1\par
         \addvspace\multicolsep
      \fi
      \small
      \makeatletter
      \hbadness=\@M
      \hfuzz=\maxdimen
      \pretolerance=\m@ne
      \tolerance=9999%
      \emergencystretch=5em
      \@nobreakfalse
      \DI@ind@setup
      \input{\jobname.gls}%
      \DI@item@nojoin
      \ifnum \c@GlossaryColumns>\@ne
         \end{multicols}%
      \else
         \enough@room\postmulticols
         \addvspace\multicolsep
      \fi
      \normalsize #2\par
   }{\typeout{No file \jobname.gls.}}
   \endgroup
}
% \@namedef{TP@I{}{docindex}{changes}}#1#2{%
%    \begingroup
%    \@letinstance\DI@indexitem@i{indexitem}{fixed1}%
%    \@letinstance\DI@indexitem@ii{indexitem}{fixed-r2a-nocomma}%
%    \@letinstance\DI@indexitem@iii{indexitem}{aloneaccept3}%
%    \columnsep=10pt%
%    \parskip=0pt plus 1pt%
%    \def\DI@letter@skip{\z@skip}%
%    \let\DI@letter@format\@gobble
% %    \ifnum \c@GlossaryColumns>\@ne
% %       \begin{multicols}{\c@GlossaryColumns}[#1][\GlossaryMin]%
% %    \else
%       \enough@room{\GlossaryMin}%
%       #1\par
%       \addvspace\multicolsep
% %    \fi
%    \small
%    \emergencystretch=5em
%    \@nobreakfalse
%    \DI@ind@setup
%    \@input@{\jobname.gls}%
%    \DI@item@nojoin
% %    \ifnum \c@GlossaryColumns>\@ne
% %       \end{multicols}%
% %    \else
%       \enough@room\postmulticols
%       \addvspace\multicolsep
% %    \fi
%    \normalsize #2\par
%    \endgroup
% }
%    \end{macrocode}
% \end{instance}
% 
% 
% 
% \section{Hack for removing ``Marginpar moved'' warning messages}
%
% Check if the definition matches the known. To be on the safe 
% side, only the known definition will be changed.
% 
%    \begin{macrocode}
\def\@tempa{\@next\@marbox\@currlist{\@cons\@freelist\@marbox
    \@cons\@freelist\@currbox}\@latexbug\@tempcnta\@ne
    \if@twocolumn
        \if@firstcolumn \@tempcnta\m@ne \fi
    \else
      \if@mparswitch
         \ifodd\c@page \else\@tempcnta\m@ne \fi
      \fi
      \if@reversemargin \@tempcnta -\@tempcnta \fi
    \fi
    \ifnum\@tempcnta <\z@  \global\setbox\@marbox\box\@currbox \fi
    \@tempdima\@mparbottom
    \advance\@tempdima -\@pageht
    \advance\@tempdima\ht\@marbox
    \ifdim\@tempdima >\z@
      \@latex@warning@no@line {Marginpar on page \thepage\space moved}%
    \else
      \@tempdima\z@
    \fi
    \global\@mparbottom\@pageht
    \global\advance\@mparbottom\@tempdima
    \global\advance\@mparbottom\dp\@marbox
    \global\advance\@mparbottom\marginparpush
    \advance\@tempdima -\ht\@marbox
    \global\setbox \@marbox
                   \vbox {\vskip \@tempdima
                          \box \@marbox}%
    \global \ht\@marbox \z@
    \global \dp\@marbox \z@
    \kern -\@pagedp
    \nointerlineskip
    \hb@xt@\columnwidth
      {\ifnum \@tempcnta >\z@
          \hskip\columnwidth \hskip\marginparsep
       \else
          \hskip -\marginparsep \hskip -\marginparwidth
       \fi
       \box\@marbox \hss}%
    \nointerlineskip
    \hbox{\vrule \@height\z@ \@width\z@ \@depth\@pagedp}}
\ifx \@addmarginpar\@tempa
%    \end{macrocode}
% It matched.
%    \begin{macrocode}
   \def\@addmarginpar{\@next\@marbox\@currlist{\@cons\@freelist\@marbox
       \@cons\@freelist\@currbox}\@latexbug\@tempcnta\@ne
       \if@twocolumn
           \if@firstcolumn \@tempcnta\m@ne \fi
       \else
         \if@mparswitch
            \ifodd\c@page \else\@tempcnta\m@ne \fi
         \fi
         \if@reversemargin \@tempcnta -\@tempcnta \fi
       \fi
       \ifnum\@tempcnta <\z@  \global\setbox\@marbox\box\@currbox \fi
       \@tempdima\@mparbottom
       \advance\@tempdima -\@pageht
       \advance\@tempdima\ht\@marbox
       \ifdim \@tempdima<\z@ \@tempdima\z@ \fi % Modification
       \global\@mparbottom\@pageht
       \global\advance\@mparbottom\@tempdima
       \global\advance\@mparbottom\dp\@marbox
       \global\advance\@mparbottom\marginparpush
       \advance\@tempdima -\ht\@marbox
       \global\setbox \@marbox
                      \vbox {\vskip \@tempdima
                             \box \@marbox}%
       \global \ht\@marbox \z@
       \global \dp\@marbox \z@
       \kern -\@pagedp
       \nointerlineskip
       \hb@xt@\columnwidth
         {\ifnum \@tempcnta >\z@
             \hskip\columnwidth \hskip\marginparsep
          \else
             \hskip -\marginparsep \hskip -\marginparwidth
          \fi
          \box\@marbox \hss}%
       \nointerlineskip
       \hbox{\vrule \@height\z@ \@width\z@ \@depth\@pagedp}}
\else
%    \end{macrocode}
% It didn't match. Inform the user of what is to come.
%    \begin{macrocode}
   \typeout{Expect a lot of ``Marginpar moved'' warnings.}
\fi
\let\@tempa=\relax
%    \end{macrocode}
% 
% 
% \section{Things not to index}
% 
%    \begin{macrocode}
\DoNotIndex{\def,\let,\else,\fi,\then,\x_cs,\x_relax}
\DoNotIndex{\csname,\endcsname,\string,\the,\expandafter,\noexpand}
\DoNotIndexBy{@@}\DoNotIndexBy{@}\DoNotIndexBy{_}\DoNotIndexBy{FD@}
%    \end{macrocode}
% 
\endinput