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%D \module
%D [ file=strc-lev,
%D version=2010.09.23,
%D title=\CONTEXT\ Structure Macros,
%D subtitle=Automatic Levels,
%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 / Automatic Levels}
%D This module is the result of a discussion between Alan Braslau and
%D me. I used to have a private (\MKII) module for this but the new
%D structure code in \MKIV\ is more suitable for this so now we have
%D it as core functionality. For the moment this an experiment that
%D Alan and I conduct so it might evolve.
\registerctxluafile{strc-lev}{1.001}
\unprotect
\unexpanded\def\definesectionlevels{\dodoubleargument\strc_levels_define}
\unexpanded\def\startsectionlevel {\dosingleempty \strc_levels_start }
\unexpanded\def\strc_levels_define[#category][#list]{\ctxcommand{definesectionlevels("#category","#list")}}
\unexpanded\def\strc_levels_start [#category]{\ctxcommand{startsectionlevel("#category")}}
\unexpanded\def\stopsectionlevel {\ctxcommand{stopsectionlevel()}}
\unexpanded\def\nostarthead{\dotripleargument\strc_levels_start_nop} % used at the lua end
\unexpanded\def\nostophead {\dosingleargument\strc_levels_stop_nop } % used at the lua end
\unexpanded\def\strc_levels_start[#category]%
{\doifassignmentelse{#category}
{\ctxcommand{startsectionlevel("\v!default")}[#category]}
{\ctxcommand{startsectionlevel("#category")}}}
\unexpanded\def\strc_levels_start_nop[#category][#settings][#userdata]%
{\blank
\noindentation{\tttf[start missing section level #category]}
\blank}
\unexpanded\def\strc_levels_stop_nop[#category]%
{\blank
\noindentation{\tttf[stop missing section level #category]}
\blank}
\definesectionlevels
[\v!default]
[\v!chapter,
\v!section,
\v!subsection,
\v!subsubsection,
\v!subsubsubsection,
\v!subsubsubsubsection]
\let\definestructurelevels\definesectionlevels
\let\startstructurelevel \startsectionlevel
\let\stopstructurelevel \stopsectionlevel
\protect \endinput
% \starttext
%
% \definehead[xxxxxxsection][subsubsection]
% \setuphead [xxxxxxsection][color=red]
%
% \definesectionlevels[main][chapter,section,subsection,subsubsection]
% \definesectionlevels[next][chapter,section,subsection,xxxxxxsection]
%
% \startsectionlevel [main] [title=first top level]
%
% \startsectionlevel [main] [title=first lower level]
% \startsectionlevel [main] [title=second lower level]
% \startsectionlevel [main] [title=third lower level]
% test
% \stopsectionlevel
% \stopsectionlevel
% \stopsectionlevel
%
% \startsectionlevel [main] [title=first lower level]
% \startsectionlevel [main] [title=second lower level]
% \startsectionlevel [next] [title=third lower level]
% test
% \stopsectionlevel
% \stopsectionlevel
% \stopsectionlevel
%
% \stopsectionlevel
%
% \stoptext
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