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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 a project. There is
%D 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}
\installcorenamespace{parallelhandler}
\installcommandhandler \??parallel {parallel} \??parallel
\setupparallel
[\c!setups=parallel:place:default]
\let\buff_parallel_define_saved\defineparallel
\let\buff_parallel_setup_saved \setupparallel
\unexpanded\def\defineparallel{\dodoubleargument\buff_parallel_define}
\unexpanded\def\setupparallel {\dotripleargument\buff_parallel_setup}
\def\buff_parallel_define[#name][#instances]%
{\buff_parallel_define_saved[#name][\c!list={#instances}]% list is internal
\clf_defineparallel{#name}{#instances}%
\expandafter\newtoks\csname\??parallelhandler#name\endcsname
\processcommacommand[#instances]{\buff_parallel_define_instance{#name}}%
\setuevalue{\e!start#name}{\buff_parallel_start{#name}}%
\setuevalue{\e!stop #name}{\buff_parallel_stop}}
\let\buff_process_parallel_instance\relax
\def\buff_process_parallel_instances
{\the\csname\??parallelhandler\currentparallel\endcsname}
\def\buff_parallel_define_instance#name#instance%
{\normalexpanded{\buff_parallel_define_saved[#instance][#name]}%
\definebuffer[#instance]%
%\edef\t_buff_parallel{\csname\??parallelhandler#name\endcsname}%
\expandafter\let\expandafter\t_buff_parallel\csname\??parallelhandler#name\endcsname
\appendtoks
\edef\currentparallelinstance{#instance}%
\buff_process_parallel_instance\relax
\to \t_buff_parallel
\setuevalue{\e!stop#instance}{\buff_parallel_save{#instance}}}
\def\buff_parallel_setup[#name][#instances][#setups]%
{\processcommalist[#instances]{\buff_parallel_setup_instance{#name}{#setups}}}
\def\buff_parallel_setup_instance#name#setups#instance%
{\buff_parallel_setup_saved[#name:#instance][#setups]}
\unexpanded\def\buff_parallel_start#name%
{\pushmacro\currentparallel
\edef\currentparallel{#name}%
\clf_nextparallel{\currentparallel}}
\unexpanded\def\buff_parallel_stop
{\popmacro\currentparallel}
\unexpanded\def\buff_parallel_save#instance% defined moet ook aan de lua kant kunnen
{\clf_saveparallel
{\currentparallel}%
{#instance},
{\thedefinedbuffer{#instance}}%
\relax}
\unexpanded\def\placeparallel
{\dotripleempty\buff_parallel_place}
\def\buff_parallel_place[#name][#instance][#settings]%
{\begingroup
\edef\currentparallel{#name}%
\setupcurrentparallel[#settings]%
\clf_placeparallel
{\currentparallel}%
{#instance}%
{%
% setups {\parallelparameter\c!setups}%
start {\parallelparameter\c!start}%
n {\parallelparameter\c!n}%
criterium {\parallelparameter\c!criterium}%
}%
\relax
\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}% can be kep at the lua end .. no need to use a virtual file
\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{\currentparallel:\currentparallelinstance}\c!setups}}
\unexpanded\def\doifelseparallel#name#instance%
{\clf_doifelseparallel{#name}{#instance}}
\let\doifparallelelse\doifelseparallel
\unexpanded\def\resetparallel
{\dodoubleempty\buff_parallel_reset}
\def\buff_parallel_reset[#name][#instance]%
{\clf_resetparallel{#name}{#instance}}
\startsetups parallel:place:default
\hangafter\plusone
\hangindent4\emwidth
\dontleavehmode
\hbox to 3\emwidth \bgroup
\hss
\bf
\doifsomething \currentparallellabel {
\textreference[\currentparallellabel]{\currentparallelline}
}
\currentparallelline
\quad
\egroup
\currentparallelcontent
\par
\stopsetups
\protect \endinput
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