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%D \module
%D [ file=typo-syn,
%D version=2022.01.06,
%D title=\CONTEXT\ Typesetting Macros,
%D subtitle=synchronizers,
%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.
% Musical timestamp: this code was written when I start relistening my whole
% digitized cd collection with the (new) r2r soekris dac in my setup.
%D Yet another experiment (triggered by a question / demand from Ton Otten.)
%D
%D \starttyping
%D \setupsynchronize [paralleltext] [color=darkblue]
%D % \setupsynchronize [paralleltext] [style=\tx,color=darkred]
%D % \setupsynchronize [paralleltext] [style=\txx,color=darkgreen]
%D
%D \dorecurse{10}{%
%D \paralleltext
%D {[een allereerste zinnetje]}
%D {[een tweede zinnetje]}%
%D \space
%D \paralleltext
%D {[een derde zin]}
%D {[een vierde zinnetje]}
%D \space
%D } \removeunwantedspaces
%D \par test line \page
%D
%D \paralleltext
%D {[\ignorespaces\samplefile{tufte}\removeunwantedspaces]}
%D {[\samplefile{ward}\removeunwantedspaces]}%
%D \par test line \page
%D
%D \paralleltext
%D {[\ignorespaces\samplefile{tufte}\removeunwantedspaces]}
%D {[\ignorespaces\samplefile{tufte}\removeunwantedspaces]}%
%D \par test line \page
%D
%D \paralleltext
%D {[\ignorespaces\samplefile{ward}\removeunwantedspaces]}%
%D {[\ignorespaces\samplefile{tufte}\removeunwantedspaces]}
%D \par test line \page
%D \stoptyping
\writestatus{loading}{ConTeXt Typesetting Macros / Synchronizers}
\registerctxluafile{typo-syn}{autosuffix}
\unprotect
\definesystemattribute[synchronize][public]
\installcorenamespace {synchronize}
\installcommandhandler \??synchronize {synchronize} \??synchronize
\tolerant\protected\def\typo_synchronize#1#*[#2]#:#3#4%
{\dontleavehmode
\begingroup
\def\currentsynchronize{#1}%
\setupcurrentsynchronize[#2]%
\dontcomplain
\setbox\scratchboxtwo\hbox\bgroup
\usesynchronizestyleandcolor\c!style\c!color
\setstrut
\strut
\ignorespaces#4\removeunwantedspaces
\egroup
\scratchdimentwo\wd\scratchboxtwo
\clf_registersynchronize
\strutht
\strutdp
\box\scratchboxtwo
\relax
\setbox\scratchboxone\hbox{#3}%
\scratchdimenone\wd\scratchboxone
\unhbox\scratchboxone
\advance\scratchdimentwo-\scratchdimenone
\ifdim\scratchdimentwo>\zeropoint
\wordboundary
\novrule
% \vrule
\s!width \scratchdimentwo
\s!height \exheight
\s!depth \zeropoint
\relax
\fi
\endgroup}
\appendtoks
\protected\instance\edefcsname\currentsynchronize\endcsname{\typo_synchronize{\currentsynchronize}}%
\to \everydefinesynchronize
% \setupsynchronize
% [\c!alternative=\v!horizontal]
\definesynchronize
[paralleltext]
\protect \endinput
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