%%
%% This is file `sref.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% sref.dtx  (with options: `package')
%% 
\NeedsTeXFormat{LaTeX2e}[1999/12/01]
\ProvidesPackage{sref}[2012/01/28 v1.0 Semantic Cross-References]
\DeclareOption{showmeta}{\PassOptionsToPackage{\CurrentOption}{metakeys}}
\newif\ifextrefs\extrefsfalse
\DeclareOption{extrefs}{\extrefstrue}
\ProcessOptions
\RequirePackage{metakeys}
\newcommand{\sref}[2][]{%
\@ifundefined{sref@part}{\sref@hlink[#1]{#2}}{\sref@hlink[#1]{\sref@part @#2}}}
\newcommand{\srefs}[3][]{%
\def\@test{#1}\ifx\@test\@empty\sref{#2} and \sref{#3}\else #1\fi}
\newcommand{\srefl}[3][]{%
\def\@test{#1}\ifx\@test\@empty\sref{#2} to \sref{#3}\else #1\fi}
\newcommand{\spageref}[1]{%
\@ifundefined{sref@part}{\sref@pageref{#1}}{\sref@pageref{\sref@part @#1}}}
\newif\ifhref\hreffalse
\AtBeginDocument{\@ifpackageloaded{hyperref}{\hreftrue}{\hreffalse}}
\newcommand\sref@href@ifh[2]{\ifhref\href{#1}{#2}\else#2\fi}
\newcommand\sref@hlink@ifh[2]{\ifhref\hyperlink{#1}{#2}\else#2\fi}
\newcommand\sref@target@ifh[2]{\ifhref\hypertarget{#1}{#2}\else#2\fi}
\def\sref@target%
{\ifx\sref@id\@empty\else%
\edef\@target{sref@\@ifundefined{sref@part}{}{\sref@part @}\sref@id @target}
\sref@target@ifh\@target{}\fi}
\newcommand\@sref@def[3]{\expandafter\gdef\csname sref@#1@#2\endcsname{#3}}
\ifextrefs\newwrite\refs@file\else\def\refs@file{\@auxout}\fi
\newcommand\sref@def[3]{%\@sref@def{#1}{#2}{#3}%
\protected@write\refs@file{}{\string\@sref@def{#1}{#2}{#3}}}
\addmetakey{srefaddidkey}{prefix}
\newcommand\srefaddidkey[2][]{\metasetkeys{srefaddidkey}{#1}%
\@metakeys@ext@clear@keys{#2}{sref@id}{}% id cannot have a default
\metakeys@ext@clear@keys{#2}{id}{}%
\metakeys@ext@showkeys{#2}{id}%
\define@key{#2}{id}{\edef\sref@id{\srefaddidkey@prefix ##1}%
\expandafter\edef\csname #2@id\endcsname{\srefaddidkey@prefix ##1}}}
\newcommand\makeextrefs[1]{\gdef\sref@part{#1}%
\makeatletter
\IfFileExists{\jobname.refs}{\input{\jobname.refs}}{}%
\immediate\openout\refs@file=\jobname.refs
\makeatother}
\newcommand\sref@label[2]{%
\sref@def{\@ifundefined{sref@part}{}{\sref@part @}#2}{page}{\thepage}%
\sref@def{\@ifundefined{sref@part}{}{\sref@part @}#2}{label}{#1}}
\newcommand\sreflabel[2]{\message{sreflabel: #1, #2}\sref@label{#1 \@currentlabel}{#2}}
\newcommand\sref@label@id[1]{\ifx\sref@id\@empty\else\sref@label{#1}{\sref@id}\fi}
\newcommand{\sref@hlink}[2][]{\def\@test{#1}%
\@ifundefined{sref@#2@label}%
{\protect\G@refundefinedtrue\@latex@warning{reference #2 undefined}??}%
{\sref@hlink@ifh{sref@#2@target}{\ifx\@test\@empty\@nameuse{sref@#2@label}\else #1\fi}}}
\newcommand{\sref@page@label}[1]{p.~{#1}}
\newcommand{\sref@pageref}[1]{\@ifundefined{sref@#1@page}%
{\protect\G@refundefinedtrue\@latex@warning{reference #1 undefined}\sref@page@label{??}}%
{\sref@hlink@ifh{sref@#1@target}{\sref@page@label{\@nameuse{sref@#1@page}}}}}
\newcommand{\sref@href}[3][]{\def\@test{#1}%
\@ifundefined{sref@#2@label}%
{\protect\G@refundefinedtrue\@latex@warning{reference #2 undefined}??}%
{\@ifundefined{sref@#3@URI}%
{\protect\G@refundefinedtrue\@latex@warning{external refs of type  #3 undefined}??}%
{\edef\@uri{\@nameuse{sref@#3@URI}.pdf\#sref@#2@target}
\edef\@label{\ifx\@test\@empty\@nameuse{sref@#2@label}\else #1\fi}
\sref@href@ifh\@uri\@label}}}
\ifextrefs
\newcommand{\extref}[3][]{\def\theextref{\sref@href[#1]{#2@#3}{#2}}%
\csname doextref@#2\endcsname}
\else
\newcommand{\extref}[3][]{\sref[#1]{#3}}
\fi
\ifextrefs
\newcommand{\extpageref}[3][]{\def\theextref{\sref@pageref[#1]{#2@#3}{#2}}%
\csname doextpageref@#2\endcsname}
\else
\newcommand{\extpageref}[3][]{\spageref[#1]{#3}}
\fi
\newcommand\extrefstyle[2]{\expandafter\gdef\csname doextref@#1\endcsname{#2}}
\newcommand\extpagerefstyle[2]{\expandafter\gdef\csname doextpageref@#1\endcsname{#2}}
\newcommand{\inputrefs}[2]{%
\@namedef{sref@#1@URI}{#2}
\makeatletter%
\IfFileExists{#2.refs}{\input{#2.refs}}
             {\PackageError{sref}{Reference file #1.refs does not exist}
                                 {Maybe you have to run LaTeX on #2.tex first}}
\makeatother}
\srefaddidkey{sequation}
\def\sref@sequation@heading{equation}
\newenvironment{sequation}[1][]{\metasetkeys{sequation}{#1}%
\ifx\sref@id\@empty\begin{displaymath}\else% no id, using equation*
\begin{equation}\sref@target\sref@label@id{\sref@sequation@heading~(\theequation)}\fi}
{\ifx\sref@id\@empty\end{displaymath}\else\end{equation}\fi}
\newenvironment{seqnarray}[1][]%
{\metasetkeys{sequation}{#1}\begin{eqnarray*}\sref@target%
\sref@label@id{\sref@sequation@heading~(\theequation)}}
{\end{eqnarray*}}
\newcommand\withcite[2]{#2~\cite{#1}}
\newenvironment{withcitation}[1]{\def\citeit{\cite{#1}}}{}
\endinput
%%
%% End of file `sref.sty'.
