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%D \module
%D [ file=buff-par,
%D version=2010.12.05,
%D title=\CONTEXT\ Buffer Macros,
%D subtitle=Parallel,
%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 Buffer Macros / Parallel}
\registerctxluafile{buff-par}{1.001}
%D This module is developped for Thomas Schmitz as part of
%D a project. There is no documentation yet.
%D
%D \starttyping
%D \defineparallel[main][one,two]
%D
%D \startmain
%D \startone
%D first 1
%D [reference] first 2
%D first 3
%D \stopone
%D \starttwo
%D second 1
%D \stoptwo
%D \stopmain
%D
%D \placeparallel[main][one,two][criterium=all]
%D criterium=all start=<number> n=<number>
\unprotect
\installcorenamespace{parallel}
\installcommandhandler \??parallel {parallel} \??parallel
\setupparallel
[\c!setups=parallel:place:default]
\let\buff_parallel_define_saved\defineparallel
\unexpanded\def\defineparallel
{\dodoubleargument\buff_parallel_define}
\def\buff_parallel_define[#name][#instances]%
{\buff_parallel_define_saved[#name]
\ctxcommand{defineparallel("#name","#instances")}%
\processcommalist[#instances]\buff_parallel_define_instance
\setuevalue{\e!start#name}{\buff_parallel_start{#name}}%
\setuevalue{\e!stop #name}{\buff_parallel_stop}}
\def\buff_parallel_define_instance#instance%
{\normalexpanded{\buff_parallel_define_saved[#instance][\currentparallel]}%
\definebuffer[#instance]%
\setuevalue{\e!stop#instance}{\buff_parallel_save{#instance}}}
\unexpanded\def\buff_parallel_start#name%
{\pushmacro\currentparallel
\edef\currentparallel{#name}%
\ctxcommand{nextparallel("\currentparallel")}}
\unexpanded\def\buff_parallel_stop
{\popmacro\currentparallel}
\unexpanded\def\buff_parallel_save#instance% defined moet ook aan de lua kant kunnen
{\ctxcommand{saveparallel("\currentparallel","#instance",buffers.raw("\thedefinedbuffer{#instance}"))}}
\unexpanded\def\placeparallel
{\dotripleempty\buff_parallel_place}
\def\buff_parallel_place[#name][#instance][#settings]%
{\begingroup
\edef\currentparallel{#name}%
\ctxcommand{placeparallel("\currentparallel","#instance","#settings")}% -- todo: pass options as k/v
\endgroup}
\def\doflushparallel#instance#status#line#label#content% called at lua end
{\begingroup
\def\currentparallelinstance{#instance}%
\def\currentparallelnumber {#status}%
\def\currentparallelline {#line}%
\def\currentparallellabel {#label}%
\def\currentparallelcontent {#content}%
\ifcase#status\relax
\expandafter\buff_parallel_flush_nop
\or
\expandafter\buff_parallel_flush_yes
\fi
\endgroup}
\def\buff_parallel_flush_nop
{}
\def\buff_parallel_flush_yes
{\directsetup{\namedparallelparameter\currentparallelinstance\c!setups}}
\unexpanded\def\doifelseparallel#name#instance%
{\ctxcommand{doifelseparallel("#name","#instance")}}
\unexpanded\def\resetparallel
{\dodoubleempty\buff_parallel_reset}
\def\buff_parallel_reset[#name][#instance]%
{\ctxcommand{resetparallel("#name","#instance"))}}
\startsetups parallel:place:default
\hangafter\plusone
\hangindent4em
\dontleavehmode
\hbox to 3em \bgroup
\hss
\bf
\doifsomething \currentparallellabel {
\textreference[\currentparallellabel]{\currentparallelline}
}
\currentparallelline
\quad
\egroup
\currentparallelcontent
\par
\stopsetups
\protect \endinput
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