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% \iffalse meta-comment
%
% arcs.dtx
% Copyright 2004 Gianfranco Boggio-Togna
%
% This program may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version~1.2
% of this license or (at your option) any later version.
% The latest version of this license is in
% http://www.latex-project.org/lppl.txt
% and version 1.2 or later is part of all distributions of LaTeX
% version 1999/12/01 or later.
%
% This program consists of the files arcs.dtx and arcs.ins
%
%<*driver>
\documentclass[11pt]{ltxdoc}
\setlength{\parindent}{0pt}
\setlength{\parskip}{1ex}
\MakeShortVerb{|}
% To get the documented source of the package, comment out
% the next line and uncomment the following one.
\OnlyDescription
%\AlsoImplementation
\begin{document}
\DocInput{arcs.dtx}
\end{document}
%</driver>
%
% \fi
%
% \CheckSum{188}
% \makeatletter
% \let\ps@titlepage=\ps@empty
% \makeatother
%
% \title{{\LARGE\tt arcs.sty}\\
% Placing an arc over (under) some text\\
% {\small Version 1\ \ (2004/05/09)}\\\ \\}
% \author{Gianfranco Boggio\,--Togna\\
% \textsl{gbt\kern .08em @\kern .1em acm.org}}
% \date{}
% \maketitle
% \vspace{6ex}
% The package provides two commands for placing an arc over or under
% a short (up to three letters) piece of text. The commands generate an
% |\hbox| and can be used in math formulas
% (see \textit{The \TeX{}book}, p.\,151).
%
% |\overarc| puts an arc above the text given as argument.\\
% |\underarc| puts the arc below the text.
%
% The size of the arc is chosen so that it embraces all the text. In
% some cases, you may wish to use a smaller or larger size. An
% optional argument can specify a factor which
% is multiplied by the width of the text: the size of the symbol is then
% chosen as if the text had that width. Keep in mind, however, that only
% a limited range of sizes is available in the Computer Modern fonts.
% \vfill
% {\footnotesize
% \noindent \copyright\ Copyright 2004 Gianfranco Boggio\,--Togna.\par
% This program may be distributed and/or modified under the
% conditions of the \LaTeX{} Project Public License, either version~1.2
% of this license or (at your option) any later version.
% The latest version of this license is in
% \texttt{http://www.latex-project.org/lppl.txt}
% and version 1.2 or later is part of all distributions of \LaTeX{}
% version 1999/12/01 or later.\par
% This program consists of the files \texttt{arcs.dtx} and
% \texttt{arcs.ins}
% }
% \newpage
% \StopEventually{}
% \section*{The code}
% \begin{macrocode}
\NeedsTeXFormat {LaTeX2e}[2003/12/01]
\ProvidesPackage {arcs}[2004/05/09]
\RequirePackage {relsize}
\newcommand{\overarc}[2][1]{\over@under@arc{#1}{#2}\z@}
\newcommand{\underarc}[2][1]{\over@under@arc{#1}{#2}\@ne}
\newcommand{\over@under@arc}[3]{%
\leavevmode
\hbox {%
\setbox\z@ = \hbox {#2}%
\ifdim \ht\z@ = \z@ % arc over/under space
\ifdim \dp\z@ = \z@
\ht\z@ = 1ex\relax
\fi
\fi
\dimen@ = #1\wd\z@
\begingroup
\let \rs@size@warning = \@gobbletwo
\relsize{-10}%
\wd\@ne = \z@
\@whiledim \wd\@ne < .95\dimen@ \do {%
\ifx \@currsize \Huge
\dimen@ = \z@
\else
$%
\skip@ = \f@baselineskip
\fontencoding{OML}\fontfamily{cmm}\fontseries{m}%
\fontshape{it}\fontsize{\ssf@size}{\skip@}\selectfont
\global \setbox\@ne = \hbox {%
\hss\symbol{"5\ifnum #3=\z@ F\else E\fi}\hss}%
\ifdim \wd\@ne < \dimen@
\fontsize{\sf@size}{\skip@}\selectfont
\global \setbox\@ne = \hbox {%
\hss\symbol{"5\ifnum #3=\z@ F\else E\fi}\hss}%
\ifdim \wd\@ne < \dimen@
\fontsize{\tf@size}{\skip@}\selectfont
\global \setbox\@ne = \hbox {%
\hss\symbol{"5\ifnum #3=\z@ F\else E\fi}\hss}%
\fi
\fi
$%
\fi
\ifdim \wd\@ne < \dimen@
\relsize{+1}%
\fi
\global \dimen@i = \fontdimen5\the\font
}%
\endgroup
\ifnum #3 = \z@
\dimen@ii = 1.067\ht\z@
\global \divide \dimen@i by \tw@
\global \advance \dimen@i by -\ht\@ne
\advance \dimen@ii by .6\dimen@i
\else
\dimen@ii = -1.05\ht\@ne
\advance \dimen@ii by -.75pt
\ifdim \dp\z@ > \z@
\advance \dimen@ii by -\dp\z@
\fi
\fi
\copy\z@
\dimen@ = \wd\z@
\advance \dimen@ by \wd\@ne
\kern -.5\dimen@
\raisebox {\dimen@ii}[\z@][\z@]{\copy\@ne}%
\dimen@ = \wd\z@
\advance \dimen@ by -\wd\@ne
\dimen@ = .5\dimen@
\kern \dimen@
}%
}
% \end{macrocode}
%% \Finale
\endinput
|
