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+%D \module
+%D [ file=node-ini,
+%D version=2006.08.20,
+%D title=\CONTEXT\ Character Macros,
+%D subtitle=Node Support (Initialization),
+%D author=Hans Hagen,
+%D date=\currentdate,
+%D copyright=PRAGMA]
+%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}{Node Support (initialization)}
+
+\registerctxluafile{node-ini}{1.001}
+
+% \appendtoks
+% \ctxlua {
+% callbacks.push('hpack_filter')
+% callbacks.push('vpack_filter')
+% callbacks.push('buildpage_filter')
+% callbacks.push('pre_linebreak_filter')
+% callbacks.push('pre_output_filter')
+% }%
+% \to \everybeforeoutput
+% \appendtoks
+% \ctxlua {
+% callbacks.pop('hpack_filter')
+% callbacks.pop('vpack_filter')
+% callbacks.pop('buildpage_filter')
+% callbacks.pop('pre_linebreak_filter')
+% callbacks.pop('pre_output_filter')
+% }%
+% \to \everyafteroutput
+
+\newcount\shownodescounter
+
+\def\shownextnodes {\afterassignment\doshownodes\shownextnodescounter}
+\def\showflatnodes {\afterassignment\doshownodes\showflatnodescounter}
+\def\doshownextnodes {\ctxlua{texio.write_nl('log',nodes.serializebox(\number\shownodescounter,false,true))}}
+\def\doshowflatnodes {\ctxlua{texio.write_nl('log',nodes.serializebox(\number\shownodescounter,true, true))}}
+\def\visualizenextnodes{\dowithnextbox{\ctxlua{nodes.visualizebox(\number\nextbox,false,true)}}}
+\def\visualizeflatnodes{\dowithnextbox{\ctxlua{nodes.visualizebox(\number\nextbox,true,true)}}}
+
+\def\starttracingnodes[#1]{\ctxlua{nodes.tracers.characters.start("#1")}}
+\def\stoptracingnodes {\ctxlua{nodes.tracers.characters.stop()}}
+
+% \starttext
+% \starttracingnodes[characters]
+% \input tufte \par
+% \input tufte \par
+% \stoptracingnodes
+% \stoptext
+
+\endinput