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%%% ====================================================================
%%% @LaTeX-file{
%%% filename = "upref.dtx",
%%% version = "2.01",
%%% date = "2004/07/29",
%%% time = "16:37:01 EDT",
%%% checksum = "07926 151 617 5530",
%%% author = "American Mathematical Society",
%%% copyright = "Copyright 1996 American Mathematical Society,
%%% all rights reserved. Copying of this file is
%%% authorized only if either:
%%% (1) you make absolutely no changes to your copy,
%%% including name; OR
%%% (2) if you do make changes, you first rename it
%%% to some other name.",
%%% address = "American Mathematical Society,
%%% Technical Support,
%%% Electronic Products and Services,
%%% P. O. Box 6248,
%%% Providence, RI 02940,
%%% USA",
%%% telephone = "401-455-4080 or (in the USA and Canada)
%%% 800-321-4AMS (321-4267)",
%%% FAX = "401-331-3842",
%%% email = "tech-support@ams.org (Internet)",
%%% codetable = "ISO/ASCII",
%%% keywords = "latex, amslatex, ams-latex, cross references",
%%% supported = "yes",
%%% abstract = "This is a LaTeX package that provides printing
%%% of \cn{ref}s in an upright font even if the
%%% current context is italic or slanted.",
%%% docstring = "The checksum field above contains a CRC-16
%%% checksum as the first value, followed by the
%%% equivalent of the standard UNIX wc (word
%%% count) utility output of lines, words, and
%%% characters. This is produced by Robert
%%% Solovay's checksum utility.",
%%% }
%%% ====================================================================
%
%\iffalse
%<*driver>
\documentclass{amsdtx}
\begin{document}
\title{The \pkg{upref} package}
\author{American Mathematical Society\\ Michael Downes\\
updated by Barbara Beeton}
\date{Version \fileversion, \filedate}
\hDocInput{upref.dtx}
\end{document}
%</driver>
%\fi
%
% \maketitle
%
% \MakeShortVerb\|
%
% \section{Introduction}
%
% This package changes the \cn{ref} command so that it never applies
% a slanted font shape to its argument, regardless of context. This
% was the default behavior in \cls{amsart} version 1.1. Starting with
% \cls{amsart} version 1.2, upright references must be obtained via
% |\usepackage{upref}|.
%
% \StopEventually{}
%
% \section{Implementation}
% Give package name, date, version.
% \begin{macrocode}
\NeedsTeXFormat{LaTeX2e}[1995/06/01]
\ProvidesPackage{upref}[2004/07/29 v2.01]
% \end{macrocode}
%
% \begin{macro}{\@noref}
% Give a warning if a cited reference isn't defined.
% \begin{macrocode}
\newcommand{\@noref}[1]{%
\G@refundefinedtrue
\nfss@text{\reset@font\bfseries ??}%
\@latex@warning{Reference `#1' on page \thepage\space undefined}%
}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@setref}
% If the current fontshape is italic or slanted, we want to switch to
% upright/roman for printing the number of a \cn{ref}. This requires
% changing the \cs{@setref} command.
%
% Since \cs{@setref} is modified by the \pkg{hyperref} package, delay
% the definition until \cs{AtBeginDocument}. Then check whether
% \pkg{hyperref} is loaded. If it is, we have to redefine some
% control sequences that \pkg{hyperref} defined in order to get
% upright references even in a \pkg{hyperref} environment.
% [tjk,bnb, 2004/07/29]
% \begin{macrocode}
\AtBeginDocument{%
\@ifpackageloaded{hyperref}{%
% \end{macrocode}
% We overload \cs{Hy@setref@link} as this is where the upright
% references get clobbered. Used in overloaded \cs{@setref}.
% \begin{macrocode}
\def\Hy@setref@link#1#2#3#4#5#6\@nil#7{%
\begingroup
\toks0{\hyper@@link{#5}{#4}}%
\toks1\@xp{#7{\textup{#1}\hbox{}}{#2}{#3}{#4}{#5}}%
\edef\x{\endgroup\the\toks0{\the\toks1}}\x
}%
% \end{macrocode}
% We should not have to overload \cs{@setref}, but there is
% a chance that an author is using an old version of hyperref
% which does not use \cs{Hy@setref@link} in \cs{@setref}.
% \begin{macrocode}
\def\@setref#1#2#3{%
\ifx#1\relax
\@xp\protect\@noref{#3}%
\else
\@xp\Hy@setref@link#1\@empty\@empty\@nil{#2}%
\fi
}%
}{%
\def\@setref#1#2#3{\ifx#1\relax
\protect\@noref{#3}%
\else
\protect\textup{\@xp#2#1\hbox{}}%
\fi
}%
}%
}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@upn}
% The function \cs{\@upn} is used to force theorem numbers and
% similar elements to be upright in sloped or italic contexts.
% If a suitable italic font with upright numbers and punctuation is
% available, this function should be redefined to be a no-op.
% \begin{macrocode}
\providecommand\@upn{\textup}
% \end{macrocode}
% \end{macro}
%
% The usual \cs{endinput} to ensure that random garbage at the end of
% the file doesn't get copied by \fn{docstrip}.
% \begin{macrocode}
\endinput
% \end{macrocode}
%
% \CheckSum{61}
% \Finale
|
