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%D \module
%D [ file=pack-fen,
%D version=2011.07.21,
%D title=\CONTEXT\ Packaging Macros,
%D subtitle= Fences for Ruled Content,
%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 Packaging Macros / Fences for Ruled Content}
%D \startbuffer
%D \useMPlibrary[meta-imp-hooks.mkiv]
%D
%D \framed[frame=off,bottomframe=righthook]{Bottom right hook}
%D \stopbuffer
%D
%D \typebuffer
%D
%D \startlinecorrection
%D \getbuffer
%D \stoplinecorrection
\unprotect
\def\installleftframerenderer#1#2%
{\setvalue{\??framedleft\v!on#1}{\whateverleftframe{#2}}%
\expandafter\let\csname\??framedleft\v!off#1\expandafter\endcsname\csname\??framedleft\v!on#1\endcsname}
\def\installrightframerenderer#1#2%
{\setvalue{\??framedright\v!on#1}{\whateverrightframe{#2}}%
\expandafter\let\csname\??framedright\v!off#1\expandafter\endcsname\csname\??framedright\v!on#1\endcsname}
\def\installtopframerenderer#1#2%
{\setvalue{\??framedtop\v!on#1}{\whatevertopframe{#2}}%
\expandafter\let\csname\??framedtop\v!off#1\expandafter\endcsname\csname\??framedtop\v!on#1\endcsname}
\def\installbottomframerenderer#1#2%
{\setvalue{\??framedbottom\v!on#1}{\whateverbottomframe{#2}}%
\expandafter\let\csname\??framedbottom\v!off#1\expandafter\endcsname\csname\??framedbottom\v!on#1\endcsname}
\ifdefined \pack_framed_overlay_initialize_indeed
\let\setinstalledframedimensions\pack_framed_overlay_initialize_indeed
\else
\def\setinstalledframedimensions
{\edef\overlaywidth {\the\frameddimenwd\space}%
\edef\overlayheight {\the\dimexpr\frameddimenht+\frameddimendp\relax\space}%
\edef\overlaydepth {\the\frameddimendp\space}%
\edef\overlaycolor {\framedparameter\c!backgroundcolor}%
\edef\overlaylinecolor{\framedparameter\c!framecolor}%
\edef\overlaylinewidth{\the\ruledlinewidth}}
\fi
\newbox\b_framed_rendered
\def\whateverleftframe#1%
{\setinstalledframedimensions
\setbox\b_framed_rendered\vbox to \overlayheight{\vss#1\vss}%
\setbox\b_framed_rendered\hbox to \zeropoint{\box\b_framed_rendered\hss}%
\ht\b_framed_rendered\zeropoint
\dp\b_framed_rendered\zeropoint
\box\b_framed_rendered}
\def\whateverrightframe#1%
{\setinstalledframedimensions
\setbox\b_framed_rendered\vbox to \overlayheight{\vss#1\vss}%
\setbox\b_framed_rendered\hbox to \zeropoint{\hss\box\b_framed_rendered}%
\ht\b_framed_rendered\zeropoint
\dp\b_framed_rendered\zeropoint
\box\b_framed_rendered}
\def\whatevertopframe#1%
{\setinstalledframedimensions
\setbox\b_framed_rendered\hbox to \overlaywidth{\hss#1\hss}%
\setbox\b_framed_rendered\vbox to \zeropoint{\box\b_framed_rendered\vss}%
\ht\b_framed_rendered\zeropoint
\dp\b_framed_rendered\zeropoint
\box\b_framed_rendered
\nointerlineskip}
\def\whateverbottomframe#1%
{\setinstalledframedimensions
\setbox\b_framed_rendered\hbox to \overlaywidth{\hss#1\hss}%
\setbox\b_framed_rendered\vbox to \zeropoint{\vss\box\b_framed_rendered}%
\ht\b_framed_rendered\zeropoint
\dp\b_framed_rendered\zeropoint
\box\b_framed_rendered}
\protect \endinput
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