%D \module
%D   [       file=grph-inc, % moved from core-fig
%D        version=2006.08.26, % overhaul of 1997.03.31
%D          title=\CONTEXT\ Graphic Macros,
%D       subtitle=Figure Inclusion,
%D         author=Hans Hagen,
%D           date=\currentdate,
%D      copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%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 / Figure Inclusion}

%D todo:
%D
%D - color conversion
%D - alternative images
%D - a few more obscure things

\registerctxluafile{grph-inc}{1.001}
\registerctxluafile{grph-fil}{1.001}
\registerctxluafile{grph-u3d}{1.001} % this will change
\registerctxluafile{grph-swf}{1.001} % this will change

\unprotect

%D The following registers are used (if only to be downward compatible).

\newbox  \foundexternalfigure
\newif   \ifskipexternalfigures
\newtoks \everyexternalfigureresets
\newtoks \everyexternalfigurechecks
\newtoks \externalfigurepostprocessors

\def\resetfigurevariables {\the\everyexternalfigureresets}
\def\checkfigurevariables {\the\everyexternalfigurechecks}

%D Historic feature:

\appendtoks
    \global\let\externalfigurelog\empty
\to \everyexternalfigureresets

\let\runutilityfiletrue    \relax \let\runutilityfilefalse    \relax
\let\consultutilityfiletrue\relax \let\consultutilityfilefalse\relax

%D You can register additional suffixes with the following command:
%D
%D \starttyping
%D \definegraphictypesynonym[jbig] [jb2]
%D \definegraphictypesynonym[jbig2][jb2]
%D \definegraphictypesynonym[jbg]  [jb2]
%D \stoptyping

\unexpanded\def\definegraphictypesynonym
  {\dodoubleargument\dodefinegraphictypesynonym}

\def\dodefinegraphictypesynonym[#1][#2]%
  {\ctxlua{figures.registersuffix("#1","#2")}}

%D Additional paths can be installed with the regular setup command. The next
%D macro picks up the list.

\def\setfigurepathlist
  {\ctxlua{figures.setpaths("\@@exlocation",\!!bs\@@exdirectory\!!es)}}

%D Variables:

\def\defaultfigurewidth  {8\lineheight}
\def\defaultfigureheight {6\lineheight}

\def\figurestatus        {\numexpr\ctxlua{figures.tprint("status","status",0)}\relax} % number: 0 = not found
\def\figurewidth         {\ctxlua{figures.tprint("status","width",0)}sp}
\def\figureheight        {\ctxlua{figures.tprint("status","height",0)}sp}
\def\figurexscale        {\ctxlua{figures.tprint("status","xscale",1)}}
\def\figureyscale        {\ctxlua{figures.tprint("status","yscale",1)}}

\def\figurelabel         {\ctxlua{figures.tprint("request","label")}}
\def\figurefileoriginal  {\ctxlua{figures.tprint("request","name")}}
\def\figurefilepage      {\ctxlua{figures.tprint("request","page",1)}}
\def\figurefileoptions   {\ctxlua{figures.tprint("request","options")}}
\def\figurefileconversion{\ctxlua{figures.tprint("request","conversion")}}
\def\figurefilecache     {\ctxlua{figures.tprint("request","cache")}}
\def\figurefileprefix    {\ctxlua{figures.tprint("request","prefix")}}

\def\figurenaturalwidth  {\ctxlua{figures.tprint("used","width", \number\dimexpr\defaultfigurewidth \relax)}sp}
\def\figurenaturalheight {\ctxlua{figures.tprint("used","height",\number\dimexpr\defaultfigureheight\relax)}sp}

\def\figurefilepath      {\ctxlua{tex.sprint(tex.ctxcatcodes,file.dirname (figures.get("used","fullname")))}}
\def\figurefilename      {\ctxlua{tex.sprint(tex.ctxcatcodes,file.nameonly(figures.get("used","fullname")))}}
\def\figurefiletype      {\ctxlua{tex.sprint(tex.ctxcatcodes,file.extname (figures.get("used","fullname")))}}
\def\figurefullname      {\ctxlua{figures.tprint("used","fullname")}}
\def\noffigurepages      {\ctxlua{figures.tprint("used","pages",0)}}

\let\naturalfigurewidth  \figurenaturalwidth
\let\naturalfigureheight \figurenaturalheight

\let\figurescalewidth    \figurewidth
\let\figurescaleheight   \figureheight
\let\figurescalexscale   \figurexscale
\let\figurescaleyscale   \figureyscale

\appendtoks
    \ctxlua { % figures.defaultwidth .. why not dimen
        figures.setpaths("\@@exlocation","\@@exdirectory") ;
        figures.defaultwidth  = \number\dimexpr\defaultfigurewidth \relax ;
        figures.defaultheight = \number\dimexpr\defaultfigureheight\relax ;
        figures.boxnumber     = \number\foundexternalfigure ;
    }%
\to \everyexternalfigureresets

%D In some situations we need to make sure that the figure related variables
%D are reset. This is especially important when we are nesting. Is this still
%D needed in \MKIV.

\def\resetexternalfigures
  {\let\@@efoption         \empty % \let\@@efprefix\empty
   \let\@@efmaxwidth       \empty % \let\@@efcache \empty
   \let\@@efmaxheight      \empty % \let\@@efframe \v!off
   \let\@@efforegroundcolor\empty
   \let\@@efcolor          \empty
   \let\@@efconversion     \empty
   \let\@@efbackground     \empty}

\appendtoks \resetexternalfigures \to \everyoverlay
\appendtoks \resetexternalfigures \to \everybeforepagebody % not really needed

\def\resetfigureusersettings
  {%
   \let\@@efmethod    \empty
   \let\@@eflabel     \empty
   \let\@@efsize      \empty
   \let\@@efconversion\@@exconversion
   \let\@@efprefix    \@@exprefix
   \let\@@efcache     \@@excache
   \let\@@efpage      \!!zerocount
   \let\@@efobject    \@@exobject
   \let\@@efdisplay   \empty
   %
   \let\@@efpreset    \v!yes
   \let\@@efsplit     \empty
   \let\@@efcolor     \empty
   %
   \let\@@efsymbol    \v!no
   %
   \let\@@efcontrols  \v!no
   \let\@@efpreview   \v!no
   \let\@@efrepeat    \v!no
   %
   \let\@@efforegroundcolor\empty
   %
   \let\@@efhfactor   \empty
   \let\@@efwfactor   \empty
   \let\@@effactor    \empty
   \let\@@efmaxwidth  \@@exmaxwidth
   \let\@@efmaxheight \@@exmaxheight
   \let\@@efxscale    \empty
   \let\@@efyscale    \empty
   \let\@@efscale     \empty
   \let\@@efsx        \!!plusone
   \let\@@efsy        \!!plusone
   \let\@@efwidth     \empty
   \let\@@efheight    \empty
   \let\@@eflines     \empty
   \let\@@efgrid      \empty}

\resetfigureusersettings

\appendtoks
    \resetfigureusersettings
\to \everyexternalfigureresets

\def\checkfigureusersettings
  {% old features
   \doif\@@exoption\v!frame
     {\let\@@efframe\v!on}%
   \doif\@@exoption\v!empty
     {\skipexternalfigurestrue
      \let\@@efframe\v!off}%
   \doifsomething\@@efwidth {\doifdimensionelse\@@efwidth {\edef\@@efwidth {\the\dimexpr\@@efwidth }}\donothing}%
   \doifsomething\@@efheight{\doifdimensionelse\@@efheight{\edef\@@efheight{\the\dimexpr\@@efheight}}\donothing}%
   % fake color in gray bitmaps, assumes that
   % a transparent color is used
   \doifsomething\@@efforegroundcolor
     {\def\@@efbackground{\v!foreground,\v!color}%
      \def\@@efbackgroundcolor{\@@efforegroundcolor}}}

\appendtoks
    \checkfigureusersettings
\to \everyexternalfigurechecks

%D Internal graphics are handled at the \TEX\ end:

\def\doprocesstexlikefigure#1% retrofit into mkii
  {\global\setbox\foundexternalfigure\vbox\framed
     [\c!strut=\v!no,\c!align=\v!normal,\c!frame=\v!off,
      \c!offset=\v!overlay,\c!width=\v!fit,\c!height=\v!fit]
     {\blank[\v!disable]#1\endgraf\removelastskip}} % disable should stay here!

\def\doprocessmpslikefigure#1% retrofit into mkii
  {\global\setbox\foundexternalfigure\vbox{\convertMPtoPDF{#1}11}}

\def\docheckfigurebuffer  #1{\doprocesstexlikefigure{\getbuffer[#1]}}
\def\docheckfiguretex     #1{\doprocesstexlikefigure{\input#1\relax}}
\def\docheckfiguremps     #1{\doprocessmpslikefigure{#1}}
\def\docheckfiguremprun #1#2{\doprocesstexlikefigure{\useMPrun{#1}{#2}}}

\def\doscalefigure
  {\global\setbox\foundexternalfigure\vbox{\doscalebox\??ef{\dowithfigure{\box\foundexternalfigure}}}}

\newconditional\testexternalfigureonly

% \enabletrackers[figures.conversion]
% \externalfigure[demo.svg]
% \externalfigure[demo.svg][conversion=png]

\def\calculateexternalfigure[#1][#2][#3][#4][#5][#6]% \cmd label filename parent_id preset current
  {\dontcomplain
   \restorecatcodes
   \forgetall
   \resetfigurevariables
   \dosetefparameters{#4}{#5}{#6}%
   \checkfigurevariables
%    \begingroup
%    \color[\@@efcolor]{\xdef\globcolorattr{\internalspotcolorname}}
%    \endgroup
   \ctxlua{figures.push {
        name="#3",
        label="#2", % todo: \@eflabel
        page="\@@efpage",
        size="\@@efsize",
        object="\@@efobject",
        prefix="\@@efprefix",
        cache="\@@efcache",
        format="\@@efmethod",
        preset="\@@efprefix",
        controls="\@@efcontrols",
        preview="\@@efpreview",
        display="\@@efdisplay",
        conversion="\@@efconversion",
        color="\internalspotcolorparent\@@efcolor", % hack is needed
        ["repeat"]="\@@efrepeat",
        width="\@@efwidth", % can be crap
        height="\@@efheight", % can be crap
    } }%
   \ctxlua{figures.identify()}%
   \ifconditional\testexternalfigureonly
      \ifcase\figurestatus \else
        \ctxlua{figures.check()}%
        \ctxlua{figures.dummy()}%
        \ctxlua{figures.scale()}%
        \ctxlua{figures.done()}%
      \fi
      \signalexternalfigure
   \else
      \ifcase\figurestatus
        \ctxlua{figures.dummy()}%
        \ctxlua{figures.scale()}%
      \else
        \ctxlua{figures.check()}%
        \ctxlua{figures.include()}%
        \ctxlua{figures.scale()}%
      \fi
      \ctxlua{figures.done()}%
      \signalexternalfigure
      \finishexternalfigure
   \fi
   \ctxlua{figures.pop()}}

\def\relocateexternalfigure % easier here than in lua
  {\global\setbox\foundexternalfigure\vbox to \ht\foundexternalfigure\bgroup
     \vss
     \ht\foundexternalfigure\zeropoint
     \hbox to \wd\foundexternalfigure\bgroup
        \box\foundexternalfigure
        \hss
     \egroup
   \egroup}

\def\signalexternalfigure % global
  {\ifcase\figurestatus
     \global\resetsystemmode\v!figure % todo, also: \v!resource
   \else
     \global\setsystemmode  \v!figure % todo, also: \v!resource
   \fi}

\unexpanded\def\startfoundexternalfigure#1#2% ht wd
  {\global\setbox\foundexternalfigure\vbox to #2\bgroup\vss\hbox to #1\bgroup}

\unexpanded\def\stopfoundexternalfigure
  {\hss\egroup\egroup}

\def\emptyfoundexternalfigure
  {\startfoundexternalfigure\defaultfigurewidth\defaultfigureheight
   \stopfoundexternalfigure}

\def\finishexternalfigure % here we use \figurevariables
  {\global\setbox\foundexternalfigure\vbox
     {\ifcase\figurestatus
        \let\@@efframe\v!on
      \fi
      \ifconditional\externalfigureflush
        \ifconditional\externalfigurelevel % probably background
          \ifskipexternalfigures
            % nothing
            \fakebox\foundexternalfigure
          \else\ifcase\figurestatus
            % nothing
          \else
            \the\externalfigurepostprocessors
            \box\foundexternalfigure
          \fi\fi
        \else
          \iftrialtypesetting \else \feedbackexternalfigure \fi
          \settrue\externalfigurelevel
          \ifskipexternalfigures
            \ifcase\figurestatus
              \externalfigurereplacement\figurelabel\figurefileoriginal{unknown}%
            \else
              \externalfigurereplacement\figurelabel\figurefullname{skipped}%
            \fi
          \else\ifcase\figurestatus
            \externalfigurereplacement\figurelabel\figurefileoriginal{unknown}%
          \else
            \the\externalfigurepostprocessors
            \doifelse\@@efreset\v!yes
              {\wd\foundexternalfigure\figurewidth
               \ht\foundexternalfigure\figureheight
               \dp\foundexternalfigure\zeropoint
               \box\foundexternalfigure}
              {\localframed % should also be applied to high res !
                 [\??ef]
                 [\c!offset=\v!overlay,
                  \c!width=\figurewidth,
                  \c!height=\figureheight]
                 {\vfilll\box\foundexternalfigure}}%
          \fi\fi
        \fi
      \else
        % maybe also \the\externalfigurepostprocessors
        \iftrialtypesetting \else \feedbackexternalfigure \fi
      \fi}}

\ifx\externalfigurereplacement\undefined\let\externalfigurereplacement\gobblethreearguments\fi
\ifx\externalfigureplaceholder\undefined\let\externalfigureplaceholder\gobblethreearguments\fi

\let\feedbackexternalfigure\relax % \gobblefourarguments
\let\dowithfigure          \relax

\def\getfiguredimensions
  {\dodoubleempty\dogetfiguredimensions}

\def\dogetfiguredimensions[#1][#2]%
  {\startnointerference
     \settrue\testexternalfigureonly
     \externalfigure[#1][#2,\c!display=,\c!object=\v!no]%
   \stopnointerference}

\let\getfiguredimensionsonly\getfiguredimensions

\def\doiffigureelse#1%
  {\getfiguredimensions[#1]% so data is available !
   \ifdim\figurewidth=\zeropoint % todo: \figurestatus
     \expandafter\secondoftwoarguments
   \else
     \expandafter\firstoftwoarguments
   \fi}

\def\registerexternalfigure % no placement, handy for preprocessing
  {\dotripleempty\doregisterexternalfigure}

\def\doregisterexternalfigure[#1][#2][#3]%
  {\startnointerference
     \testexternalfigureonly
     \setfalse\externalfigureflush % == test ?
     \externalfigure[#1][#2][#3]% or \doexternalfigure
     \externalfigure[#1][#2,\c!display=,\c!object=\v!no]%
   \stopnointerference}

% figurebases

\def\usefigurebase[#1]%
  {\ctxlua{figures.bases.use("#1")}}

\protect \endinput

% \startbuffer
% \definecolor [blue]   [c=1,m=.38,y=0,k=.64]
% \definecolor [yellow] [c=0,m=.28,y=1,k=.06]
%
% \definespotcolor [blue-100]   [blue]   [p=1]
% \definespotcolor [yellow-100] [yellow] [p=1]
%
% \definemultitonecolor [combicolor]   [blue=.12,yellow=.28] [c=.1,m=.1,y=.3,k=.1]
%
% \definemultitonecolor [combicolor-b] [blue=1]   [c=1,m=.38,y=0,k=.64] % force multitone
% \definemultitonecolor [combicolor-y] [yellow=1] [c=0,m=.28,y=1,k=.06] % force multitone
%
% \useexternalfigure[demo-a][mill.png]     [object=no,width=.2\textwidth]
% \useexternalfigure[demo-b][hacker-bw.jpg][object=no,width=.2\textwidth]
%
% \startbaselinecorrection \startcombination[4*1]
%   {\externalfigure[demo-a]}                     {no color}
%   {\externalfigure[demo-a][color=combicolor]}   {indexed duotone}
%   {\externalfigure[demo-a][color=combicolor-b]} {spot color}
%   {\externalfigure[demo-a][color=combicolor-y]} {spot color}
% \stopcombination \stopbaselinecorrection
%
% \startbaselinecorrection \startcombination[4*1]
%   {\externalfigure[demo-b]}                     {no color}
%   {\externalfigure[demo-b][color=combicolor]}   {indexed duotone}
%   {\externalfigure[demo-b][color=combicolor-b]} {spot color}
%   {\externalfigure[demo-b][color=combicolor-y]} {spot color}
% \stopcombination \stopbaselinecorrection
%
% \startbaselinecorrection \startcombination[4*1]
%   {\externalfigure[demo-a]}                     {no color}
%   {\externalfigure[demo-a][color=combicolor]}   {indexed duotone}
%   {\externalfigure[demo-a][color=blue-100]}     {spot color}
%   {\externalfigure[demo-a][color=yellow-100]}   {spot color}
% \stopcombination \stopbaselinecorrection
%
% \startbaselinecorrection \startcombination[4*1]
%   {\externalfigure[demo-b]}                     {no color}
%   {\externalfigure[demo-b][color=combicolor]}   {indexed duotone}
%   {\externalfigure[demo-b][color=blue-100]}     {spot color}
%   {\externalfigure[demo-b][color=yellow-100]}   {spot color}
% \stopcombination \stopbaselinecorrection
% \stopbuffer
%
% \getbuffer \typebuffer