source: trunk/admin/smartref.sty

\def\fileversion{v1.9}
\def\filedate{2002/02/28}
% smartref.sty
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%
% Giuseppe Bilotta
%
% Phone +39 095 338103
%
% Email: bourbaki@bigfoot.com
%
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%
% This package is distributed under the terms
% of the LaTeX Project Public License
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Please read the readme.txt file for details
%
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\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{smartref}[\filedate\space\fileversion\space Increase
reference capability (deep reference)]
%
\newcounter{@smartlistlen}
\newcounter{less@smartlist}
\setcounter{less@smartlist}{-2}
\newcommand*{\@increasesmartlist}{%
    \addtocounter{@smartlistlen}{1}%
    \addtocounter{less@smartlist}{1}}
\def\sm@rtreflist{{\@currentlabel}}
\@increasesmartlist
%
\newcommand*{\@getsmartreflist}[3]{%
    \ifx#1%
        \relax\protect\G@refundefinedtrue%
        \@latex@warning {SmartReference `#2' on page %
            \thepage \space undefined}%
        \nfss@text{\reset@font \bfseries ??}%
    \else%
        \expandafter #2#1%
    \fi}
\newcounter{@currsmartlistplace}
\newcommand*{\@getsmartref}[3]{%Paramaters are: #1: Where #2: Label, #3: place in list
    \edef\@smartlistplace{#3}%
    \setcounter{@currsmartlistplace}{0}%
    \edef\@originalsmartlist{%
        \expandafter\@getsmartreflist\csname sr@#2\endcsname{}{}}%
    \edef\@currsmartlist{\@originalsmartlist}%
    \loop%
        \edef\@currsmartvalue{\expandafter\@car\@currsmartlist\@nil}%
        \ifnum\the@currsmartlistplace=\theless@smartlist
            \edef\@currsmartlist{\noexpand{\expandafter\@cdr\@currsmartlist\@nil\noexpand}}%
        \else
            \edef\@currsmartlist{\expandafter\@cdr\@currsmartlist\@nil}%
        \fi
        \ifnum\the@currsmartlistplace<\@smartlistplace%
            \addtocounter{@currsmartlistplace}{1}%
    \repeat
    \edef#1{\@currsmartvalue}%
%    \typeout{Got Smart Reference (place #3, value \@currsmartvalue)}%
    }
% Hack label: also write the SmartRef data ...
\def\newsmartlabel{\@newl@bel {sr}}
%save previous \label
\AtBeginDocument{%
    \let\sr@ldlabel=\label
    \renewcommand*{\label}[1]{%
        \sr@ldlabel{#1}%
        \@bsphack%
        \protected@write\@auxout{}%
            {\string\newsmartlabel{#1}{\sm@rtreflist}}%
        \@esphack}%
% This one is needed for those who use AMS-LaTeX, to ensure that
% smartref labelling system is used wih equations too (AMS-LaTeX
% uses its own labeling system for equations
    \let\ltx@label=\label}
% Command to add new items to reflist:
%
\newtoks\sm@rtintern@ltok
\newcommand*{\addtoreflist}[1]{% Add item ...
    \@ifundefined{c@#1}% Check if real counter;
        {\@nocounterr{#1}}% If not, give error
        {\@ifundefined{#1posinlist}{% If yes, check if already defined:
        \sm@rtintern@ltok=\expandafter{\sm@rtreflist}% If not, define everything ...
        \expandafter\edef\csname sm@rtreflist\endcsname{%
            \the\sm@rtintern@ltok{\noexpand\csname the#1\endcsname}}% Add it ...
% Set position of counter in list:
        \expandafter\edef\csname #1posinlist\endcsname{\the@smartlistlen}%
        \@increasesmartlist%
% Define SmartCommands:
% Define command to get number of <name> for <label>; parameters:
% #1 is where the value goes, #2 is label name.
        \typeout{Defining \csname sget#1val\endcsname ...}
% `smart get <name> value'
% Usage \sgetchapternum{\holder}{labelname}
        \expandafter\def\csname sget#1val\endcsname##1##2{%
            \@ifundefined{sr@##2}{%
                \G@refundefinedtrue%
                \@latex@warning{SmartReference `##2' on page \thepage \space undefined}%
                \def##1{0}}%
                {\expandafter\@getsmartref{##1}{##2}{\csname #1posinlist\endcsname}}%
            }%
% Define command to check if number of <name> for <label> is different from current
% <name> value; parameters:
% #1 is label name.
        \typeout{Defining \csname s#1ref\endcsname ...}
% `smart <name> \ref'
% Usage \schapterref{labelname}
% TODOs:
%   - check for counters that get reset.
        \expandafter\newif\csname if#1changed\endcsname % define if consctruct
        \expandafter\def\csname is#1changed\endcsname##1{% checker for change
            \csname sget#1val\endcsname{\sm@rtrefvalue}{##1}%
            \edef\@currentrefvalue{\csname the#1\endcsname}%
            \ifx\sm@rtrefvalue\@currentrefvalue%
                \csname #1changedfalse\endcsname%
            \else%
                \csname #1changedtrue\endcsname%
            \fi}%
        \expandafter\def\csname s#1ref\endcsname##1{%
            \csname is#1changed\endcsname{##1}%
            \csname if#1changed\endcsname%
                , \csname short#1name\endcsname~\csname #1ref\endcsname{##1}%
%                , \csname short#1name\endcsname~\sm@rtrefvalue%
            \else%
                \relax%
            \fi%
            }%
% Define shorthand for \ref{labelname}\s<name>ref{labelname}; parameters:
% #1 is label name.
        \typeout{Defining \csname sref#1ref\endcsname ...}
% Usage \srefchapterref{labelname}
% If HyperRef is used, let it use no-link refs
% TODO: define starred and unstarred version; maybe the same for the next.
        \@ifpackageloaded{hyperref}{%
            \expandafter\def\csname sref#1ref\endcsname##1{%
                \@refstar{##1}\csname s#1ref\endcsname{##1}%
                }
            }{
            \expandafter\def\csname sref#1ref\endcsname##1{%
                \ref{##1}\csname s#1ref\endcsname{##1}%
                }%
            }%
% Define equivalent of \pageref; parameters:
% #1 is label name.
        \typeout{Defining \csname #1ref\endcsname ...}
% Usage \chapterref{labelname}
        \expandafter\def\csname #1ref\endcsname##1{%
            \csname sget#1val\endcsname{\sm@rtrefv@lue}{##1}%
            \sm@rtrefv@lue%
            }%
        }{}%
        }%
    }
%
\DeclareOption{page}{%
    \AtBeginDocument{%
    \addtoreflist{page}%
    \providecommand*\shortpagename{pag.}%
    }}
\DeclareOption{chapter}{%
    \AtBeginDocument{%
    \addtoreflist{chapter}%
    \@ifundefined{smartref}{%
        \newcommand*{\smartref}[1]{%
            \srefchapterref{#1}%
            }%
        }{%
        \let\nochapter@smartref=\smartref%
        \renewcommand*{\smartref}[1]{%
            \nochapter@smartref{#1}\schapterref{#1}}%
        }
    %\DeclareRobustCommand{\smartref}%
    \@ifpackagewith{babel}{italian}{%
        \providecommand*\shortchaptername{Cap.}}{%
        \providecommand*\shortchaptername{Chap.}}
    \typeout{Short chapter name defined: \shortchaptername}%
    }}
\DeclareOption{part}{%
    \AtBeginDocument{%
    \addtoreflist{part}%
    \@ifundefined{smartref}{%
        \newcommand*{\smartref}[1]{%
            \srefpartref{#1}%
            }%
        }{%
        \let\nopart@smartref=\smartref%
        \renewcommand*{\smartref}[1]{%
            \nopart@smartref{#1}\spartref{#1}}%
        }
    %\DeclareRobustCommand{\smartref}%
    \@ifpackagewith{babel}{italian}{%
        \providecommand*\shortpartname{Parte}}{%
        \providecommand*\shortpartname{Part}}%
    \typeout{Short part name defined: \shortpartname}%
    }}
\DeclareOption*{%
    \PackageWarning{smartref}%
                   {Option `\CurrentOption' unknown!\MessageBreak%
                    Adding `\CurrentOption' as a reflevel}%
    \expandafter\addtoreflist\expandafter{\CurrentOption}
    }
\DeclareOption{byname}{\AtEndOfPackage{\usepackage{byname}}}
\ProcessOptions\relax
\endinput