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%D \module
%D [ file=pack-cut, % comes from core-vis/trac-vis
%D version=1996.06.01,
%D title=\CONTEXT\ Packaging Macros,
%D subtitle=Cut boxes,
%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.
\unprotect
% to be redone in a more modern way
%D \macros
%D {makecutbox, cuthbox, cutvbox, cutvtop}
%D
%D Although mainly used for marking the page, these macros can also serve local use.
%D
%D \startbuffer
%D \setbox0=\vbox{a real \crlf vertical box} \makecutbox0
%D \stopbuffer
%D
%D \typebuffer
%D
%D This marked \type{\vbox} shows up as:
%D
%D \startlinecorrection
%D \getbuffer
%D \stoplinecorrection
%D
%D The alternative macros are used as:
%D
%D \startbuffer
%D \cuthbox{a made cut box}
%D \stopbuffer
%D
%D \typebuffer
%D
%D This is typeset as:
%D
%D \startlinecorrection
%D \getbuffer
%D \stoplinecorrection
%D
%D By setting the next macros one can influence the length of the marks as well as
%D the horizontal and vertical divisions.
\newdimension\d_pack_cutmarks_width
\newdimension\d_pack_cutmarks_height
\newdimension\d_pack_cutmarks_depth
\newinteger \horizontalcutmarks \horizontalcutmarks \plustwo
\newinteger \verticalcutmarks \verticalcutmarks \plustwo
\newinteger \cutmarkoffset \cutmarkoffset \plusone
\mutable\let\cutmarksymbol \relax
\mutable\def\cutmarklength {2\bodyfontsize}
\mutable\def\cutmarkrulethickness{\onepoint}
\mutable\lettonothing\cutmarktoptext
\mutable\lettonothing\cutmarkbottomtext
\mutable\lettonothing\cutmarkhoffset
\mutable\lettonothing\cutmarkvoffset
\permanent\protected\def\horizontalcuts
{\hpack to \d_pack_cutmarks_width
{\dorecurse\horizontalcutmarks{\vrule\s!width\cutmarkrulethickness\s!height\cutmarklength\hfill}%
\unskip}}
\permanent\protected\def\verticalcuts
{\vpack to \dimexpr\d_pack_cutmarks_height+\d_pack_cutmarks_depth\relax
{\hsize\cutmarklength
\dorecurse\verticalcutmarks{\vrule\s!height\cutmarkrulethickness\s!width\hsize\vfill}%
\unskip}}
\permanent\protected\def\baselinecuts
{\ifdim\d_pack_cutmarks_depth>\zeropoint
\vpack to \dimexpr\d_pack_cutmarks_height+\d_pack_cutmarks_depth\relax
{\hsize\dimexpr\cutmarklength/2\relax
\vskip\zeropoint\s!plus\d_pack_cutmarks_height
\vrule\s!height\cutmarkrulethickness\s!width\hsize
\vskip\zeropoint\s!plus\d_pack_cutmarks_depth}%
\fi}
\permanent\protected\def\cutmarksymbols#1%
{\hpack to \d_pack_cutmarks_width
{\setbox\scratchbox\hbox to \cutmarklength
{\hss\infofont\cutmarksymbol\hss}%
\hss
\vpack to \cutmarklength
{\scratchdimen\dimexpr\cutmarklength/2\relax
\scratchskip \ifempty\cutmarkhoffset\cutmarkoffset\scratchdimen\else\cutmarkhoffset\fi
\vss
\hbox to \d_pack_cutmarks_width
{\llap{\copy\scratchbox\hskip\scratchskip}%
\hskip\scratchdimen\hss
\infofont#1%
\hss\hskip\scratchdimen
\rlap{\hskip\scratchskip\copy\scratchbox}}%
\vss}%
\hss}}
\permanent\protected\def\makecutbox#1% not grouped !
{\d_pack_cutmarks_height\ht#1%
\d_pack_cutmarks_depth \dp#1%
\d_pack_cutmarks_width \wd#1%
\setbox#1\hpack
{\dontcomplain
\forgetall
\boxmaxdepth\maxdimen
\offinterlineskip
\scratchdimen\dimexpr\cutmarklength/2\relax
\hsize\d_pack_cutmarks_width
\setbox\scratchbox\vpack
{\setbox\scratchbox\hpack{\horizontalcuts}%
\scratchskip\ifempty\cutmarkvoffset\cutmarkoffset\scratchdimen\else\cutmarkvoffset\fi
\tlap{\copy\scratchbox\vskip\scratchskip}%
\hpack to \d_pack_cutmarks_width
{\scratchskip\ifempty\cutmarkhoffset\cutmarkoffset\scratchdimen\else\cutmarkhoffset\fi
\setbox\scratchbox\hpack{\verticalcuts}%
\llap{\copy\scratchbox\hskip\scratchskip}%
\ifzeropt\d_pack_cutmarks_depth
\hfill
\else
\bgroup
\setbox\scratchbox\hpack{\baselinecuts}%
\llap{\copy\scratchbox\hskip\scratchskip}%
\hfill
\rlap{\hskip\scratchskip\copy\scratchbox}%
\egroup
\fi
\rlap{\hskip\scratchskip\copy\scratchbox}}%
\blap{\vskip\scratchskip\copy\scratchbox}}%
\ht\scratchbox\d_pack_cutmarks_height
\dp\scratchbox\d_pack_cutmarks_depth
\wd\scratchbox\zeropoint
\startcolor[\defaulttextcolor]%
\box\scratchbox
\ifrelax\cutmarksymbol \else
\setbox\scratchbox\vpack
{\scratchskip\ifempty\cutmarkvoffset\cutmarkoffset\scratchdimen\else\cutmarkvoffset\fi
\vskip-\dimexpr\scratchskip+\cutmarklength\relax
\hpack{\cutmarksymbols\cutmarktoptext}%
\vskip\dimexpr\scratchskip+\d_pack_cutmarks_height+\d_pack_cutmarks_depth+\scratchskip\relax
\hpack{\cutmarksymbols\cutmarkbottomtext}}%
\ht\scratchbox\d_pack_cutmarks_height
\dp\scratchbox\d_pack_cutmarks_depth
\wd\scratchbox\zeropoint
\box\scratchbox
\fi
\stopcolor
\box#1}%
\wd#1\d_pack_cutmarks_width
\ht#1\d_pack_cutmarks_height
\dp#1\d_pack_cutmarks_depth
\box#1}
\permanent\protected\def\cuthbox{\hpack\bgroup\dowithnextbox{\makecutbox\nextbox\flushnextbox\egroup}\hbox}
\permanent\protected\def\cutvbox{\vpack\bgroup\dowithnextbox{\makecutbox\nextbox\flushnextbox\egroup}\vbox}
\permanent\protected\def\cutvtop{\tpack\bgroup\dowithnextbox{\makecutbox\nextbox\flushnextbox\egroup}\vtop}
\protect \endinput
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