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%D \module
%D [ file=m-pdfsnc,
%D version=2003.12.23,
%D title=\CONTEXT\ Modules,
%D subtitle=Editor Synchronization,
%D author={Hans Hagen \& Ton Otten},
%D date=\currentdate,
%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
% \enablemode[demo]
% This file is a variation of the file pdfsync4context.tex that ships
% with the pdfsync package (used by iTeXMac and TeXShop) by Piero
% D'Ancona and Jérôme Laurens. I made the macros a bit more efficient
% and added some basic tracing options as well as a few more options.
% I made this one while playing a bit with the Mac and TeX). Maybe I'll
% add a bit of support to the kernel in in order to get rid of redundant
% markers. Also, this had better be rewritten in a bit less \pdf
% dependent way so that it can also be supported by dvipdfmx. I could
% write a generic file as well, but since there is already support for
% other packages I'll not do that (now).
% compatible commands:
%
% \pdfsyncstart \pdfsyncstop \pdfsync
%
% extra commands:
%
% \enablepdfsync \disablepdfsync \pdfsynctext \pdfsyncnode \pdfsynctracemode
\ifx\pdfoutput\undefined
\donefalse
\else\ifcase\pdfoutput
\donefalse
\else\ifx\pdfsavepos\undefined
\donefalse
\else
\donetrue
\fi\fi\fi
\chardef \pdfsyncstate \zerocount
\chardef \pdfsynctracemode \zerocount
\ifdone
\writestatus{pdfsync}{loading and enabling synchronization support}
\else
\writestatus{pdfsync}{synchronization is only available with pdftex}
\let \pdfsyncstart \relax % brr, not per se symmetrically used, so
\let \pdfsyncstop \relax % enable and disable are better names
\let \pdfsync \relax
\let \pdfsynctext \gobbleoneargument
\let \pdfsyncnode \gobbleoneargument
\let \enablepdfsync \pdfsyncstart
\let \disablepdfsync \pdfsyncstop
\expandafter\endinput
\fi
\unprotect % not really needed
\newcount \pdfsynccounter
\newwrite \pdfsyncwrite
\def\pdfsyncstart{\chardef\pdfsyncstate\plusone} \let\enablepdfsync \pdfsyncstart
\def\pdfsyncstop {\chardef\pdfsyncstate\zerocount} \let\disablepdfsync\pdfsyncstop
\def\dostartpdfsync
{\immediate\openout\pdfsyncwrite\jobname.pdfsync
\immediate\write\pdfsyncwrite{\jobname}%
\immediate\write\pdfsyncwrite{version 0}}
\def\dostoppdfsync
{\immediate\closeout\pdfsyncwrite}
\def\doregisterpdfsyncpage
{\immediate\write\pdfsyncwrite{s\space\realfolio}}
\def\dopdfsyncopenfile
{\immediate\write\pdfsyncwrite{(\space\readfilename}}
\def\dopdfsyncclosefile
{\immediate\write\pdfsyncwrite{)}}
\def\doregisterpdfsyncnode#1%
{\ifcase\pdfsyncstate\else
\pdfsavepos
\immediate\write\pdfsyncwrite{l\space\the\pdfsynccounter\space\the\inputlineno}%
\expanded{\write\pdfsyncwrite{p\ifnum#1=\plusone*\fi\space\the\pdfsynccounter\space\noexpand\the\pdflastxpos\space\noexpand\the\pdflastypos}}%
\global\advance\pdfsynccounter\plusone
\fi}
\let\pdfsynctracer\gobbleoneargument
\def\pdfsync {\doregisterpdfsyncnode\plusone \pdfsynctracer*}
\def\pdfsyncnode{\doregisterpdfsyncnode\zerocount\pdfsynctracer}
\def\pdfsynctext{\doregisterpdfsyncnode\plusone \pdfsynctracer}
\appendtoks \dostartpdfsync \to \everystarttext
%appendtoks \dostoppdfsync \to \everystoptext
\appendtoks \doregisterpdfsyncpage \to \everyshipout
\appendtoks \dopdfsyncopenfile \to \everybeforereadfile
\appendtoks \dopdfsyncclosefile \to \everyafterreadfile
\appendtoks \enablepdfsync \to \everystarttext
\appendtoks \disablepdfsync \to \everypagebody
% beware, adding nodes this way will interfere with the typesetting
\appendtoks \pdfsyncnode p\to \everypar
\appendtoks \pdfsyncnode m\to \everymath
\appendtoks \pdfsyncnode h\to \everyhbox
% just for fun
\def\pdfsynctracer#1%
{\ifcase\pdfsynctracemode\else
\ifcase\pdfsyncstate\else
\begingroup
\forgetall
\disablepdfsync
\ifcase\pdfsynctracemode\or % could be done more efficient, box around ifcase
\setbox\scratchbox\hbox to \zeropoint{\hss\infofont#1\hss}% 1
\else
\setbox\scratchbox\hbox to \zeropoint{\hss\traceboxplacementtrue\boxcursor\hss}% 2/3/4
\fi
\smashbox\scratchbox\box\scratchbox
\ifcase\pdfsynctracemode\or\or\or
\setbox\scratchbox\hbox to \zeropoint{\hss\raise1.25ex\hbox{\infofont#1}\hss}% 3
\smashbox\scratchbox\box\scratchbox
\or
\setbox\scratchbox\hbox to \zeropoint{\hss\lower1.25ex\hbox{\infofont#1}\hss}% 4
\smashbox\scratchbox\box\scratchbox
\fi
\endgroup
\fi
\fi}
% \def\pdfsynctracer#1% more efficient but unreadable
% {\ifcase\pdfsynctracemode\else
% \ifcase\pdfsyncstate\else
% \begingroup
% \forgetall
% \disablepdfsync
% \setbox\scratchbox\hbox to \zeropoint
% {\hss
% \ifcase\pdfsynctracemode\or
% \infofont#1% 1
% \else
% \traceboxplacementtrue\boxcursor% 2/3/4
% \fi
% \hss}%
% \smashbox\scratchbox\box\scratchbox
% \setbox\scratchbox\hbox to \zeropoint
% {\hss
% \ifcase\pdfsynctracemode\or\or\or
% \raise1.25ex\hbox{\infofont#1}% 3
% \or
% \lower1.25ex\hbox{\infofont#1}% 4
% \fi
% \hss}%
% \smashbox\scratchbox\box\scratchbox
% \endgroup
% \fi
% \fi}
\protect
\doifnotmode{demo}{\endinput}
\chardef\pdfsynctracemode=3
\starttext
\chapter{Test}
\processfile{tufte}
\startitemize
\item first
\item second
\stopitemize
\processfile{tufte}
\startlines
some local \pdfsync sync and \pdfsynctext{here}a marked point
some local \pdfsync sync and \pdfsyncnode{here}a marked point
\stoplines
\stoptext
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