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%%
%% This is file `ut-backref.sty',
%%
%% Most of the code in here is taken from:
%%
%% File: backref.dtx Copyright (C) 1995, 1996, 1997 David Carlisle,
%% Sebastian Rahtz
%%
%%
\def\fileversion{1.2}
\def\filedate{1998/11/03}
\ProvidesPackage{ut-backref}[\filedate:
bibliographical back referencing, \fileversion]
%%% User-Interface
\long\def\page@backref#1#2#3{#1}
\long\def\section@backref#1#2#3{#2}
\long\def\hyper@section@backref#1#2#3{\hyperlink{#3}{#2}}
\long\def\hyper@page@backref#1#2#3{\hyperlink{page.#1}{#1}}
\DeclareOption{pageref}{%
\def\backref{\small(cited on p\thinspace}%
\def\backrefs{\small(cited on pp\thinspace}%
\def\backrefclose{)}%
\def\backrefsclose{)}%
\let\backrefxxx\page@backref
}
\DeclareOption{ref}{%
\def\backref{\small(cited in section\thinspace}%
\def\backrefs{\small(cited in sections\thinspace}%
\def\backrefclose{)}%
\def\backrefsclose{)}%
\let\backrefxxx\section@backref
}
\DeclareOption{hyperref}{%
\def\backref{}%
\def\backrefs{}%
\def\backrefclose{}%
\def\backrefsclose{}%
\let\backrefxxx\hyper@section@backref
}
\DeclareOption{hyperpageref}{%
\def\backref{}%
\def\backrefs{}%
\def\backrefclose{}%
\def\backrefsclose{}%
\let\backrefxxx\hyper@page@backref
}
\ExecuteOptions{pageref}
\ProcessOptions
%%%
\newcommand\loopcmd{}
\newcommand\br@last{}
%%% a standard loop with `delimited arguments'. \end is used
%%% only as an end marker here. The argument will be
%%% expanded, so you'll get the meaning of e.g. \backrefxxx as
%%% last element.
\def\@getlast#1,#2\end{%
% \typeout{ checking elem #1}%
\if!#2! % test if ! equals !, i.e. if #2 is empty
\edef\br@last{#1}
% \typeout{Last elem is: \br@last}%
\let\loopcmd\relax
\else
\def\loopcmd{\@getlast#2\end}%
\fi
\loopcmd
}%
%%% A wrapper adding `,' and `\end' so that we can check these
%%% in \@getlast
\newcommand\getlast[1]{\expandafter\@getlast#1,\end}
\newcounter{br@el@mcnt}
%%% this uses LaTeX's \@for ... \do loop. See ltcntrl.dtx for details.
\newcommand\lengthof[1]{%
\setcounter{br@el@mcnt}{0}%
\@for\testitem:=#1\do
{\stepcounter{br@el@mcnt}}
% \typeout{length of #1 is: \arabic{br@el@mcnt}}
}
%%%
\@ifundefined{newblock}{\def\newblock{\par}}{}
\def\xcitedOn#1{%
\@ifundefined{br@#1}{%
\typeout{Warning: No page list for reference `#1'.}%
}{% At least one citation, find out how many
\newblock% newline if "open" format used
\edef\x{\csname br@#1\endcsname}% These are the citations
\lengthof{\x}% number of citations will be in br@el@mcnt
\ifnum\arabic{br@el@mcnt}>1% More than one citation?
\backrefs%
\x%
\backrefsclose%
\else% exactly one citation
\backref%
\x%
\backrefclose%
\fi%
}% end of if defined
}% end of \def\xcitedOn
\def\xbibitem{\@ifnextchar[{\@xlbibitem}{\@xbibitem}}
\def\@xlbibitem[#1]#2#3\par{%
\oldb[#1]{#2}#3\xcitedOn{#2}
\par
}%
\def\@xbibitem#1#2\par{%
\oldb{#1}#2\xcitedOn{#1}
\par
}
\def\backcite#1#2{% #1 = list of labels, #2 = page, section, text
\@for\x:=#1\do{% for each label in list
\edef\br@label{\thinspace\protect\backrefxxx#2}%
\edef\br@list{\csname br@\x\endcsname}%
\getlast{\br@list}%
% \typeout{label \meaning\br@label, last \meaning\br@last}
\ifx\br@label\br@last
\relax\else%
\edef\x{\expandafter\@firstofone\x\@empty}%
\expandafter\protected@xdef\csname br@\x\endcsname{%
\expandafter\ifx\csname br@\x\endcsname\relax\else
\csname br@\x\endcsname,\fi\thinspace\protect\backrefxxx#2}%
\fi
}}
\def\@currentHref{}
\AtBeginDocument{%
\let\oldb\bibitem
\let\bibitem\xbibitem
\let\oldbibl\thebibliography
\def\thebibliography{\@starttoc{brf}{}\oldbibl}
\@ifundefined{NAT@parse}{%
\global\let\old@citex\@citex
\global\let\@citex\x@citex
}{\typeout{** backref set up for natbib ***}}
}
\def\x@citex[#1]#2{%
\old@citex[#1]{#2}%
\hy@backout{#2}%
}
\def\hy@backout#1{%
\@bsphack
\ifx\@empty\@currentlabel
\protected@write\@auxout{}%
{\string\@writefile{brf}%
{\string\backcite{#1}{{\thepage}{(document)}{Doc-Start}}}}%
\else
\protected@write\@auxout{}%
{\string\@writefile{brf}%
{\string\backcite{#1}{{\thepage}{\@currentlabel}{\@currentHref}}}}%
\fi
\@esphack
}
\endinput
%%
%% End of file `backref.sty'.
|
