%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.

\writestatus{loading}{ConTeXt Typesetting Macros / Synchronizers}

\registerctxluafile{typo-syn}{autosuffix}

%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
%D \startbuffer[en]
%D     This is an english text and
%D     this is also something english;
%D     as is this.
%D     Not that there is much meaning in it.
%D \stopbuffer
%D
%D \startbuffer[nl]
%D     Dit is een nederlandse tekst
%D     en dit is ook wat nederlands;
%D     net als dit.
%D     Niet dat het veel te betekenen heeft.
%D \stopbuffer
%D
%D \definesynchronizecontent
%D   [nl]
%D   [language=nl,
%D    color=darkred]
%D
%D \definesynchronizecontent
%D   [en]
%D   [language=en,
%D    color=darkgreen]
%D
%D \definesynchronize
%D   [parallel-en-nl]
%D   [list={en,nl}]
%D
%D \placesynchronize
%D   [parallel-en-nl]
%D   [buffer={en,nl}]
%D
%D \blank
%D
%D \placesynchronize
%D   [parallel-en-nl]
%D   [split={.},
%D    text={
%D     {This is an english text and this is also something english; as is this. Not that there is much meaning in it.},
%D     {Dit is een nederlandse tekst en dit is ook wat nederlands; net als dit. Niet dat het veel te betekenen heeft.}
%D    }]
%D
%D \blank
%D
%D \placesynchronize
%D   [parallel-en-nl]
%D   [split={.},
%D    text={
%D     {
%D         {This is an english text and this is also something english;},
%D         {as is this.},
%D         {Not that there is much meaning in it.}
%D     },
%D     {
%D         {Dit is een nederlandse tekst en dit is ook wat nederlands;},
%D         {net als dit.},
%D         {Niet dat het veel te betekenen heeft.}
%D     }
%D    }]
%D
%D \setupsynchronizecontent
%D   [nl]
%D   [language=nl,
%D    style=\tx,
%D    left={[},
%D    right={]},
%D    color=darkblue]
%D
%D \placesynchronize
%D   [parallel-en-nl]
%D   [distance=1pt,
%D    buffer={en,nl}]
%D \stoptyping

\unprotect

\definesystemattribute[synchronize][public]

\installcorenamespace {synchronize}
\installcorenamespace {synchronizecontent}

\installcommandhandler \??synchronize        {synchronize}        \??synchronize
\installcommandhandler \??synchronizecontent {synchronizecontent} \??synchronizecontent

\setupsynchronize
  [\c!buffer=,
   \c!text=,
   \c!list=,
   \c!split=,
   \c!distance=\zeropoint]

\let\typo_sync_rule\novrule

\installtextracker
  {synchronize}
  {\let\typo_sync_rule\vrule}
  {\let\typo_sync_rule\novrule}

\tolerant\protected\def\typo_synchronize#1#*[#2]#:#3#4%
  {\dontleavehmode
   \begingroup
   \def\currentsynchronize{#1}%
   \setupcurrentsynchronize[#2]%
   \scratchdistance\synchronizeparameter\c!distance
   \dontcomplain
   \setbox\scratchboxtwo\hbox\bgroup
     \usesynchronizestyleandcolor\c!style\c!color
     \begstrut
     \ignorespaces#4\removeunwantedspaces
     \endstrut
   \egroup
   \scratchdimentwo\wd\scratchboxtwo
   \advanceby\scratchdimentwo\scratchdistance
   \clf_registersynchronize
     \strutht
     \strutdp
     .1\onepoint
     \box\scratchboxtwo
   \relax
   \setbox\scratchboxone\hbox\bgroup
     \ignorespaces#3\removeunwantedspaces
   \egroup
   \scratchdimenone\wd\scratchboxone
   \unhbox\scratchboxone
   \advanceby\scratchdimentwo-\scratchdimenone
   \ifdim\scratchdimentwo>\zeropoint
     \wordboundary
     \typo_sync_rule
        \s!width  \scratchdimentwo
        \s!height \exheight
        \s!depth  \zeropoint
     \relax
   \fi
   \endgroup}

\protected\def\dosplitsynchronize#1#2#3#4%
  {\begingroup
   \dontcomplain
   \setbox\scratchboxtwo\hbox\bgroup
     \def\currentsynchronizecontent{#2}%
     \usesynchronizecontentstyleandcolor\c!style\c!color
     \uselanguageparameter\synchronizecontentparameter
     \synchronizecontentparameter\c!left
     \begstrut
     \ignorespaces
     #4\removeunwantedspaces
     \endstrut
     \synchronizecontentparameter\c!right
   \egroup
   \scratchdimentwo\wd\scratchboxtwo
   \advanceby\scratchdimentwo\scratchdistance
   \clf_registersynchronize
     \strutht
     \strutdp
     .1\onepoint
     \box\scratchboxtwo
   \relax
   \setbox\scratchboxone\hbox\bgroup
     \def\currentsynchronizecontent{#1}%
     \usesynchronizecontentstyleandcolor\c!style\c!color
     \uselanguageparameter\synchronizecontentparameter
     \synchronizecontentparameter\c!left
     \ignorespaces#3\removeunwantedspaces
     \synchronizecontentparameter\c!right
   \egroup
   \scratchdimenone\wd\scratchboxone
   \unhbox\scratchboxone
   \advanceby\scratchdimentwo-\scratchdimenone
   \ifdim\scratchdimentwo>\zeropoint
     \wordboundary
     \typo_sync_rule
        \s!width  \scratchdimentwo
        \s!height \exheight
        \s!depth  \zeropoint
     \relax
   \fi
   \endgroup
   \space}

\tolerant\protected\def\placesynchronize[#1]#*[#2]%
  {\dontleavehmode
   \begingroup
   \def\currentsynchronize{#1}%
   \setupcurrentsynchronize[#2]%
   \scratchdistance\synchronizeparameter\c!distance
   \clf_synchronizesteps
      list   {\synchronizeparameter\c!list}%
      split  {\synchronizeparameter\c!split}%
      buffer {\synchronizeparameter\c!buffer}%
      text   {\synchronizeparameter\c!text}%
   \relax
   \removeunwantedspaces
   \endgroup}

\appendtoks
    \protected\instance\edefcsname\currentsynchronize\endcsname{\typo_synchronize{\currentsynchronize}}%
\to \everydefinesynchronize

% \setupsynchronize
%   [\c!alternative=\v!horizontal]

\definesynchronize
  [paralleltext]

% defined in lua: \hsplit to upto width height depth criterium shrinkcriterium stretchcriterium

\protect \endinput