%D \module
%D   [       file=grph-epd,
%D        version=2010.07.29,
%D          title=\CONTEXT\ Graphic Macros,
%D       subtitle=Merging Goodies,
%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 Graphic Macros / Merging Goodies}

\unprotect

\registerctxluafile{grph-epd}{1.001}

\def\figurereference{\ctxcommand{figurestatus("reference")}} % might become private

\defineoverlay[system:graphics:epdf][\directsetup{system:graphics:epdf}]

\startsetups system:graphics:epdf
    \ctxlua{figures.mergegoodies("\externalfigureparameter\c!interaction")}%
    \reference[\figurereference]{}% todo: dest area
\stopsetups

\defineframed
  [system_graphics_epdf]
  [\c!frame=\v!off,
   \c!offset=\v!overlay,
   \c!background={\v!foreground,system:graphics:epdf}]

\def\grph_epdf_add_overlay
  {\global\setbox\foundexternalfigure\vbox\bgroup
     \system_graphics_epdf{\box\foundexternalfigure}%
   \egroup}

\appendtoks
    \iflocation
      \doif\figurefiletype{pdf}{\doifnot{\externalfigureparameter\c!interaction}\v!none\grph_epdf_add_overlay}%
    \fi
\to \externalfigurepostprocessors

\protect \endinput

% /Properties << /xxxx 22 0 R >>
% 21 0 obj << /Type /OCG /Name (xxxx) >> endobj
% 22 0 obj << /OCGs [ 21 0 R ] /Type /OCMD >> endobj

% \def\setepdflayer#1#2#3#4#5#6% x y w h (in bp) 0/1 destination
%   {\setlayer
%     [epdflinks]
%     [\c!x=#1bp,\c!y=#1\s!bp,\c!preset=\v!leftbottom]
%     {\button
%        [\c!width=#3\s!bp,\c!height=#4\s!bp,\c!offset=\v!overlay,\c!frame=\ifnum#5=1 on\else\v!off]%
%        {}[#6]}}

% \def\setepdflayer#1#2#3#4#5#6% x y w h (in bp) 0/1 destination
%   {\setlayer
%     [epdflinks]
%     [\c!x=#1bp,\c!y=#1\s!bp,\c!preset=\v!leftbottom]
%     {\gotowdhtbox{#3\s!bp}{#4\s!bp}[#6]}}