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%D \module
%D [ file=xtag-exp,
%D version=2001.08.20,
%D title=\CONTEXT\ XML Macros,
%D subtitle=Expansion,
%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 XML Macros / Expansion}
\ifnum\texengine=\luatexengine \endinput \fi
\unprotect
%D Files
\newcounter\XMLfilenesting \let\restoreXMLelements\relax
\def\startXMLreading
{\increment \XMLfilenesting \relax
\ifcase\XMLfilenesting\or
\ifprocessingXML
\let\restoreXMLelements\relax
\else
\let\restoreXMLelements\disableXMLelements
\enableXMLelements
\fi
\fi}
\def\stopXMLreading
{\ifcase\XMLfilenesting\or
\restoreXMLelements
\let\restoreXMLelements\relax
\fi
\decrement \XMLfilenesting \relax}
\ifnum\texengine=\luatexengine
\def\enableXMLfiledata
{\prependtoks \enableXMLelements \to \mainoutput % brrr, will change
\appendtoks \forcefileexpansiontrue \to \everyenableXML
\let\enableXMLfiledata\relax}
\else
\def\enableXMLfiledata
{\prependtoks \enableXMLelements \to \mainoutput % brrr, will change
\appendtoks \startXMLreading \to \everybeforeutilityread
\appendtoks \stopXMLreading \to \everyafterutilityread
\appendtoks \forcefileexpansiontrue \to \everyenableXML
\let\enableXMLfiledata\relax}
\fi
\setupXMLprocessing[\c!state=\v!start]
\appendtoks
\ifproductionrun \enableXMLfiledata \fi
\to \aftersetupXMLprocessing
%D Here we overload the mark handler.
\ifnum\texengine=\luatexengine \else
\def\XMLexpanded#1%
{\bgroup
\honorunexpanded
\dontexpandencoding
\xdef\@@globalexpanded{\noexpand#1}% why \noexpand?
\egroup
\@@globalexpanded}
\let\normalsetnormalmark\setnormalmark
\long\def\setnormalmark#1% overloaded
{\ifprocessingXML
\expandafter\setXMLexpandedmark
\else
\expandafter\normalsetnormalmark
\fi#1}
\def\setXMLexpandedmark#1#2% using a tok prevents unwanted expansion in mark
{\XMLexpanded{\scratchtoks{\enableXMLelements#2}}%
\setxvalue{\@@crk\string#1}{\the\scratchtoks}%
\normalmarks#1{\the\scratchtoks}}
\fi
\protect \endinput
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