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diff --git a/macros/latex/required/amscls/upref.dtx b/macros/latex/required/amscls/upref.dtx new file mode 100644 index 0000000000..2f2fad5572 --- /dev/null +++ b/macros/latex/required/amscls/upref.dtx @@ -0,0 +1,165 @@ +% \def\filename{upref.dtx} +% \def\fileversion{2.04} +% \def\filedate{2007/03/14} +% +% \iffalse meta-comment +% +% American Mathematical Society +% Technical Support +% Publications Technical Group +% 201 Charles Street +% Providence, RI 02904 +% USA +% tel: (401) 455-4080 +% (800) 321-4267 (USA and Canada only) +% fax: (401) 331-3842 +% email: tech-support@ams.org +% +% Copyright 1996, 2010 American Mathematical Society. +% +% This work may be distributed and/or modified under the +% conditions of the LaTeX Project Public License, either version 1.3c +% 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 1.3c or later is part of all distributions of LaTeX +% version 2005/12/01 or later. +% +% This work has the LPPL maintenance status `maintained'. +% +% The Current Maintainer of this work is the American Mathematical +% Society. +% +% \fi +% +%\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} +\DocInput{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}[2007/03/14 v2.04] +% \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] +% +% Get around a restriction in an internal AMS package (shaderef) by +% equating its command \cs{printref} to \cn{textup}; this applies +% consistently regardless of other circumstances that have unwanted +% effects. [dmj,bnb, 2005/05/17] +% \begin{macrocode} +\AtBeginDocument{% + \providecommand\printref{\textup}% + \@ifpackageloaded{hyperref}{% +% \end{macrocode} +% We overload \cs{Hy@setref@link} as this is where the upright +% references get clobbered. Used in overloaded \cs{@setref}. +% \cs{sw@slant} is usually applied by \cn{textup}, but the specials +% inserted by the hyperlink get in the way of testing for whether +% an italic correction is necessary; restore the test. +% [dmj,bnb, 2005/09/22] +% +% If the link happens to be at the beginning of a paragraph, +% \cs{sw@slant} will produce an error, since neither \unpenalty +% nor a check for italic correction is valid in vertical mode. +% For reasons not apparent, this may also occur in some other +% situations, e.g., following a proof heading containing a cross +% reference (jams561el). Add \cn{leavevmode} to compensate. +% [dmj,bnb, 2007/02/14] +% \begin{macrocode} + \def\Hy@setref@link#1#2#3#4#5#6\@nil#7{% + \begingroup + \leavevmode + \sw@slant + \toks0{\hyper@@link{#5}{#4}}% + \toks1\@xp{#7{\printref{#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\printref{\@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{66} +% \Finale |