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%D \module
%D [ file=m-editsnc,
%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.edit for
%C details.
% \enablemode[demo]
% This file is a variation of the file m-pdfsync. This time we do it
% in a more abstract way and prepare ourselves for support in dvi
% output.
% \enableeditsync
% \disableeditsync
% \editsync
% \editsynctext {string}
% \editsyncnode {char}
% \editsynctracemode [chardef: 0-4]
\writestatus{editsync}{loading and enabling editor synchronization support}
\unprotect % not really needed
\ifx\pdfoutput\undefined
\donefalse
\else\ifcase\pdfoutput
\donefalse
\else\ifx\pdfsavepos\undefined
\donefalse
\else
\donetrue
\fi\fi\fi
\chardef \editsyncstate \zerocount
\chardef \editsynctracemode \zerocount
\newcount \editsynccounter
\newwrite \editsyncwrite
\def\enableeditsync {\chardef\editsyncstate\plusone}
\def\disableeditsync{\chardef\editsyncstate\zerocount}
% The following definitions can go into the special drivers, but
% for the moment we do it this way.
\ifdone
\def\dostarteditsync
{\immediate\openout\editsyncwrite\jobname.pdfsync
\immediate\write\editsyncwrite{\jobname}%
\immediate\write\editsyncwrite{version 0}}
\def\dostopeditsync
{\closeout\editsyncwrite}
\def\doeditsyncregisterpage#1{\immediate\write\editsyncwrite{s\space\number#1}}
\def\doeditsyncopenfile #1{\immediate\write\editsyncwrite{(\space#1}}
\def\doeditsyncclosefile #1{\immediate\write\editsyncwrite{)}}
\def\doregistereditsyncnode#1#2#3% tag counter linenumber
{\pdfsavepos
\immediate\write\editsyncwrite{l\space\number#2\space\number#3}%
\expanded{\write\editsyncwrite{p\ifnum#1=\plusone*\fi\space\number#2\space\noexpand\the\pdflastxpos\space\noexpand\the\pdflastypos}}}
\else
\let\dostarteditsync \relax
\let\dostopeditsync \relax
\let\doeditsyncregisterpage\gobbleoneargument
\let\doeditsyncopenfile \gobbleoneargument
\let\doeditsyncclosefile \gobbleoneargument
\let\doregistereditsyncnode\gobblethreearguments
% These specials could be filtered by a dvitopdf backend and
% written to a jobname.pdfsync file. In that case, the x and
% y coordinates have to be to be resolved by driver.
% \def\doeditsyncregisterpage#1{\special{pdfsync: s\space\number#1}}
% \def\doeditsyncopenfile #1{\special{pdfsync: ( #1}}
% \def\doeditsyncclosefile #1{\special{pdfsync: )}}
% \def\doregistereditsyncnode#1#2#3%
% {\special{pdfsync: l the\editsynccounter\space\number#3}%
% \special{pdfsync: p\ifnum#1=\plusone*\fi\space\number#2}}
\fi
\let\editsynctracer\gobbleoneargument
\editsynccounter\minusone % counting starts at zero and we increment beforehand
\def\registereditsyncnode#1% we assume #1 is one token
{\ifcase\editsyncstate
\expandafter\gobbleoneargument
\else
\global\advance\editsynccounter\plusone
\doregistereditsyncnode#1\editsynccounter\inputlineno
\expandafter\editsynctracer
\fi}
\def\editsync {\registereditsyncnode\plusone *}
\def\editsyncnode{\registereditsyncnode\zerocount}
\def\editsynctext{\registereditsyncnode\plusone }
\appendtoks \dostarteditsync \to \everystarttext
%appendtoks \dostopeditsync \to \everystoptext
\appendtoks \doeditsyncregisterpage\realfolio \to \everyshipout
\appendtoks \doeditsyncopenfile\readfilename \to \everybeforereadfile
\appendtoks \doeditsyncclosefile\readfilename \to \everyafterreadfile
\appendtoks \enableeditsync \to \everystarttext
\appendtoks \disableeditsync \to \everypagebody
\def\editsynctracer#1%
{\ifcase\editsynctracemode\else
\begingroup
\forgetall
\disableeditsync
\ifcase\editsynctracemode\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\editsynctracemode\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}
% \def\editsynctracer#1% more efficient but unreadable
% {\ifcase\editsynctracemode\else
% \ifcase\editsyncstate\else
% \begingroup
% \forgetall
% \disableeditsync
% \setbox\scratchbox\hbox to \zeropoint
% {\hss
% \ifcase\editsynctracemode\or
% \infofont#1% 1
% \else
% \traceboxplacementtrue\boxcursor% 2/3/4
% \fi
% \hss}%
% \smashbox\scratchbox\box\scratchbox
% \setbox\scratchbox\hbox to \zeropoint
% {\hss
% \ifcase\editsynctracemode\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}
% beware, adding nodes this way will interfere with the typesetting
\appendtoks \editsyncnode p\to \everypar
\appendtoks \editsyncnode m\to \everymath
\appendtoks \editsyncnode d\to \everydisplay
\appendtoks \editsyncnode h\to \everyhbox
% For compatibility with 'pdfsync4context' we provide:
\let\pdfsyncstart\enableeditsync
\let\pdfsyncstop \disablepdfsync
\let\pdfsync \editsync
\protect
\doifnotmode{demo}{\endinput}
\chardef\editsynctracemode=3
\starttext
\chapter{Test}
\processfile{tufte}
\startitemize
\item first
\item second
\stopitemize
\processfile{tufte}
\startlines
some local \editsync sync and \editsynctext{here}a marked point
some local \editsync sync and \editsyncnode{here}a marked point
\stoplines
\stoptext
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