%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

\permanent\protected\def\installleftframerenderer#1#2%
  {\defcsname\??framedleft\v!on#1\endcsname{\whateverleftframe{#2}}%
   \letcsname\??framedleft\v!off#1\expandafter\endcsname\csname\??framedleft\v!on#1\endcsname}

\permanent\protected\def\installrightframerenderer#1#2%
  {\defcsname\??framedright\v!on#1\endcsname{\whateverrightframe{#2}}%
   \letcsname\??framedright\v!off#1\expandafter\endcsname\csname\??framedright\v!on#1\endcsname}

\permanent\protected\def\installtopframerenderer#1#2%
  {\defcsname\??framedtop\v!on#1\endcsname{\whatevertopframe{#2}}%
   \letcsname\??framedtop\v!off#1\expandafter\endcsname\csname\??framedtop\v!on#1\endcsname}

\permanent\protected\def\installbottomframerenderer#1#2%
  {\defcsname\??framedbottom\v!on#1\endcsname{\whateverbottomframe{#2}}%
   \letcsname\??framedbottom\v!off#1\expandafter\endcsname\csname\??framedbottom\v!on#1\endcsname}

\newbox\b_framed_rendered

\permanent\protected\def\whateverleftframe#1%
  {\pack_framed_overlay_initialize_indeed
   \setbox\b_framed_rendered\vpack to \d_overlay_height{\vss#1\vss}%
   \setbox\b_framed_rendered\hpack to \zeropoint{\box\b_framed_rendered\hss}%
   \ht\b_framed_rendered\zeropoint
   \dp\b_framed_rendered\zeropoint
   \box\b_framed_rendered}

\permanent\protected\def\whateverrightframe#1%
  {\pack_framed_overlay_initialize_indeed
   \setbox\b_framed_rendered\vpack to \d_overlay_height{\vss#1\vss}%
   \setbox\b_framed_rendered\hpack to \zeropoint{\hss\box\b_framed_rendered}%
   \ht\b_framed_rendered\zeropoint
   \dp\b_framed_rendered\zeropoint
   \box\b_framed_rendered}

\permanent\protected\def\whatevertopframe#1%
  {\pack_framed_overlay_initialize_indeed
   \setbox\b_framed_rendered\hpack to \d_overlay_width{\hss#1\hss}%
   \setbox\b_framed_rendered\vpack to \zeropoint{\box\b_framed_rendered\vss}%
   \ht\b_framed_rendered\zeropoint
   \dp\b_framed_rendered\zeropoint
   \box\b_framed_rendered
   \nointerlineskip}

\permanent\protected\def\whateverbottomframe#1%
  {\pack_framed_overlay_initialize_indeed
   \setbox\b_framed_rendered\hpack to \d_overlay_width{\hss#1\hss}%
   \setbox\b_framed_rendered\vpack to \zeropoint{\vss\box\b_framed_rendered}%
   \ht\b_framed_rendered\zeropoint
   \dp\b_framed_rendered\zeropoint
   \box\b_framed_rendered}

\protect \endinput