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%D \module
%D [ file=strc-lab, % was part of strc-des,
%D version=2008.10.20,
%D title=\CONTEXT\ Structure Macros,
%D subtitle=Labels,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\writestatus{loading}{ConTeXt Structure Macros / Labels}
\unprotect
% labels, we could share with enumerations and forget about the text; anyhow, figure
% labels etc can use enumerations; we keep labels for compatibility reasons; we need
% the slightly different namespace; we can still define structure counters directly
% (multiple levels) and use an enumeration without following text
% unfinished ... no longer okay
\unexpanded\def\setuplabels
{\getparameters[\??db]}
\unexpanded\def\definelabel
{\dotripleargumentwithset\dodefinelabel}
\def\dodefinelabel[#1][#2][#3]% #2 or #3 assignment
{\doenumerationinit{#1}{1}\empty
\getparameters[\??dd#1][\c!command=,\c!state=\v!start,\c!location=,\c!text=#1]%
\ifsecondargument\doifassignmentelse{#2}\donetrue\donefalse\else\donetrue\fi
\ifdone
% an independent one
\getparameters[\??dd#1][\s!counter=#1,\s!parent=\??db,#2]%
\dodefinelabelcommands{#1}{\??db}%
\dodefineenumerationcounter{#1}%
\else
\getparameters[\??dd#1][\s!counter=#1,\s!parent=\??dd#2,#3]%
\dodefinelabelcommands{#1}{\??dd#2}%
\fi}
\def\dodefinelabelcommands#1#2%
{\setuevalue {#1}{\noexpand\dolabelnumbercommand {#1}}%
\setuevalue{\c!reset #1}{\noexpand\doresetlabelnumber {#1}}%
%\setuevalue{\c!set #1}{\noexpand\dosetlabelnumber {#1}}% [#2] or {#2} ?
\setuevalue{\e!next #1}{\noexpand\donextlabelnumber {#1}}%
\setuevalue{\e!increment#1}{\noexpand\doincrementlabelnumber{#1}}%
\setuevalue{\c!current #1}{\noexpand\docurrentlabelnumber {#1}}}
% this is just for downward compatibility, we might drop it
\setvalue{\??db:\c!location:\v!inmargin}{\inmargin}
\setvalue{\??db:\c!location:\v!inleft }{\inleft}
\setvalue{\??db:\c!location:\v!inright }{\inright}
\setvalue{\??db:\c!location:\v!margin }{\inmargin}
\def\dolabelinit#1%
{\def\currentdescriptionmain{#1}%
\def\currentdescription {#1}%
\def\currentdescriptionlevel{1}}
\def\docurrentlabelnumber #1{\dolabelinit{#1}\dosingleempty\dodocurrentlabelnumber}
\def\donextlabelnumber #1{\dolabelinit{#1}\dosingleempty\dodonextlabelnumber}
\def\dolabelnumbercommand #1{\dolabelinit{#1}\dosingleempty\dodolabelnumbercommand}
\def\doresetlabelnumber #1{\dolabelinit{#1}\strc_counters_reset_sub \currentdescriptionnumber\currentdescriptionlevel}
\def\dosetlabelnumber #1#2{\dolabelinit{#1}\strc_counters_set_sub \currentdescriptionnumber\currentdescriptionlevel{#2}}
\def\doincrementlabelnumber #1{\dolabelinit{#1}\strc_counters_increment_sub\currentdescriptionnumber\currentdescriptionlevel}
\def\dodocurrentlabelnumber[#1]%
{\dontleavehmode
\writestatus{!!!}{todo: reference of label}%
\dotextprefix{\descriptionparameter\c!text}%
\convertedsubcounter[\currentdescriptionnumber][\currentdescriptionlevel]}
\def\dodonextlabelnumber[#1]% todo: ref
{\strc_counters_increment_sub\currentdescriptionnumber\currentdescriptionlevel
\dodocurrentlabelnumber[\currentdescriptionnumber]}
\def\dodolabelnumbercommand[#1]% todo: ref
{\dontleavehmode
\descriptionparameter\c!before
\begingroup
\strc_counters_increment_sub\currentdescriptionnumber\currentdescriptionlevel
\usedescriptionstyleandcolor\c!headstyle\c!headcolor
\executeifdefined{\??db:\c!location:\descriptionparameter\c!location}{\descriptionparameter\c!command}{\dodocurrentlabelnumber[#1]}%
\endgroup
\descriptionparameter\c!after}
\setuplabels
[\s!parent=\??dn]
\protect \endinput
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