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%D \module
%D [ file=page-inf, % moved from page-ini
%D version=2011.12.07, % 2000.10.20,
%D title=\CONTEXT\ Page Macros,
%D subtitle=Tracing Info,
%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 Page Macros / Tracing Info}
% this needs a real cleanup .. will be a more detailed list
\unprotect
\installcorenamespace{layoutinfo}
\newtoks\everyresetversion
\newtoks\everysetupversion
\let\currentversioninfo\empty
\unexpanded\def\setupversion
{\dosingleargument\page_info_setup}
\let\version\setupversion
\let\page_info_add_to_box\gobbleoneargument
\def\page_info_setup[#1]%
{\the\everyresetversion
\ifcsname\??layoutinfo#1\endcsname
\edef\currentversioninfo{#1}%
\let\page_info_add_to_box\page_info_add_to_box_indeed
\else
\let\currentversioninfo\empty
\let\page_info_add_to_box\gobbleoneargument
\fi
\the\everysetupversion}
\unexpanded\def\page_info_place_info % at the bottom of the page
{\csname\??layoutinfo\currentversioninfo\endcsname}
\unexpanded\def\installversioninfo#1#2%
{\setvalue{\??layoutinfo#1}{#2}}
\unexpanded\def\includeversioninfo#1%
{\csname\??layoutinfo#1\endcsname}
\installversioninfo\v!concept
{\vskip6\points
\hbox to \makeupwidth
{\infofont
\v!concept:\space\currentdate
\hss
\page_adapts_status_info}}
\installversioninfo\v!file
{\vskip6\points
\hbox to \makeupwidth
{\infofont
\getmessage\m!system{27}:\space\currentdate\space
\donefalse
\ifx\currentproject \empty \else \space\v!project :\space\currentproject \space \donetrue \fi
\ifx\currentproduct \empty \else \space\v!product :\space\currentproduct \space \donetrue \fi
\ifx\currentcomponent\empty \else \space\v!component:\space\currentcomponent\space \donetrue \fi
\ifdone \else \space\v!file :\space\jobname \space \fi
\hss
\page_adapts_status_info}}
\installversioninfo\v!temporary
{\includeversioninfo\v!file}
\appendtoks
\overfullrule\zeropoint
\to \everyresetversion
\appendtoks
\ifx\currentversioninfo\v!temporary
\overfullrule5\points
\fi
\to \everysetupversion
\newbox\b_page_versions
\def\page_info_add_to_box_indeed#1%
{\scratchdimen\wd#1%
\setbox\b_page_versions\vpack to \ht#1%
{\vfill
\settexthoffset
\hsize\dimexpr\scratchdimen-2\texthoffset\relax
\hskip\texthoffset % brrrr
\vbox to \zeropoint{\vss\page_info_place_info}%
\vskip\bodyfontsize}%
\dp\b_page_versions\zeropoint
\wd\b_page_versions\scratchdimen
\setbox#1\hpack{\box#1\hskip-\scratchdimen\box\b_page_versions}}
\setupversion % resets
[\v!final]
\protect \endinput
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