%D \module
%D   [       file=page-app, % from meta-fig
%D        version=1998.01.15,
%D          title=\CONTEXT\ Page Macros,
%D       subtitle=Independent page building,
%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 Page Macros / Applications}

%D This needs an update with a proper define and inheritance.

\unprotect

\definepapersize
  [\??fp\s!dummy]
  [\c!width=\fittingwd,
   \c!height=\fittinght]

\definelayout
  [\??fp\s!dummy]
  [\c!width=\fittingwd,\c!height=\fittinght,\c!location=\v!middle,
   \c!topspace=\!!zeropoint,\c!backspace=\!!zeropoint,
   \c!cutspace=\!!zeropoint,\c!bottomspace=\!!zeropoint,
   \c!textdistance=\!!zeropoint,\c!lines=0,\c!grid=\v!no,
   \c!top=\!!zeropoint,\c!bottom=\!!zeropoint,
   \c!margin=\!!zeropoint,\c!edge=\!!zeropoint,
   \c!leftmargin=\!!zeropoint,\c!leftedge=\!!zeropoint,
   \c!rightmargin=\!!zeropoint,\c!rightedge=\!!zeropoint,
   \c!header=\!!zeropoint,\c!footer=\!!zeropoint]

\def\dostartfittingpage[#1][#2]%
  {\page % this is kind of tricky! there can be preceding page refs
   \autostarttext
   \bgroup % resulting in a zero height page; test fig-make !
   \def\currentfittingpage{#1}%
   \dontcomplain
   % runs under current page regime, i.e. page variables passed to mp
   \getparameters[\currentfittingpage][\c!paper=,#2]% auto or size or nothing
   \setbox\scratchbox\hbox
     \bgroup
     % needed later \getparameters[\currentfittingpage][\c!paper=,#2]% auto or size or nothing
     \doifvalue{\currentfittingpage\c!margin}\v!page % undocumented
       {\offsetbox
          [\c!leftoffset=\backspace,
           \c!rightoffset=\cutspace,
           \c!topoffset=\topspace,
           \c!bottomoffset=\bottomspace]\hbox}%
     \bgroup
     \scale[\c!scale=\getvalue{\currentfittingpage\c!scale}]%
     \bgroup\localframed[\currentfittingpage]%
     \bgroup}

\def\dostopfittingpage
  {\egroup % localframed
   \egroup % scale
   \egroup % offsetbox
   \egroup % scratchbox
   \edef\fittingwd{\the\wd\scratchbox}%
   \edef\fittinght{\the\ht\scratchbox}%
   \startlocallayout
   \ifdim\fittinght<\lineheight
     % write status : too small
     \setbox\scratchbox\vbox to \lineheight{\vss\box\scratchbox\vss}%
     \edef\fittinght{\the\lineheight}%
   \fi
   \let\checkcurrentlayout\relax % else interference with odd/even layout
   \processaction
     [\getvalue{\currentfittingpage\c!paper}]
     [   \v!auto=>\def\fittingpapersize{\printpapersize},
      \s!unknown=>\let\fittingpapersize\commalistelement,
      \s!default=>\def\fittingpapersize{\??fp\s!dummy}]%
   \expanded{\setuppapersize[\??fp\s!dummy][\fittingpapersize]}%
   \definelayout
     [\v!page]%
     [\c!location=\v!middle,
      \c!width=\fittingwd,
      \c!height=\fittinght]%
   \setuplayout
     [\v!page]%
   \startmakeup[\v!standard][\c!textstate=\v!empty,\c!doublesided=\v!no,\c!pagestate=\getvalue{\currentfittingpage\c!pagestate}]%
     \centerbox{\box\scratchbox}%
   \stopmakeup
   \stoplocallayout
   \egroup
   \autostoptext}

%D \TEX\ pages (for \METAPOST\ pages, see \type {meta-fig}):

\presetlocalframed[\??tg]

\unexpanded\def\setupTEXpage
  {\dodoubleargument\getparameters[\??tg]}

\unexpanded\def\startTEXpage
  {\dosingleempty\dostartTEXpage}

\def\dostartTEXpage[#1]%
  {\dostartfittingpage[\??tg][#1]\gobblespacetokens}

\unexpanded\def\stopTEXpage
  {\removelastspace
   \dostopfittingpage}

\setupTEXpage
  [\c!scale=1000,
   \c!pagestate=,
   \c!strut=\v!no,
   \c!align=\v!normal, % needed, else problems !
   \c!offset=\v!overlay,
   \c!width=\v!fit,
   \c!height=\v!fit,
   \c!frame=\v!off]

%D For Mojca:
%D
%D \starttyping
%D \startTEXstream \chapter{Bla} Hello world!\crlf Hello world! \stopTEXstream
%D \startTEXpage   \chapter{Bla} Hello world!\crlf Hello world! \stopTEXpage
%D \stoptyping
%D
%D maybe I should support stream=yes in framed.

\unexpanded\def\startTEXstream
  {\dosingleempty\dostartTEXstream}

\def\dostartTEXstream[#1]% old code, to be redone
  {\page
   \defineoutputstream[tex]%
   \enableoutputstream[tex]%
   \unexpanded\def\stopTEXstream
     {\disableoutputstream
      \startTEXpage
      \outputstreamunvbox[tex]%
      \stopTEXpage}}

%D Application pages, a quick \MKIV\ hack:

\definetypesetting[TEXapplication]
\definebuffer[TEXapplication]

% we could use a counter and saves runs on numbering them.

\def\TEXapplicationfilename{\jobname-texapplication.tex}

\def\stopTEXapplication
  {\savebuffer[\thedefinedbuffer{TEXapplication}][\TEXapplicationfilename]%
   \typesetfile[TEXapplication][\TEXapplicationfilename]\relax}

%D \macros
%D   {startpagefigure}
%D
%D \starttyping
%D \starttext \pagefigure[two.1] \stoptext
%D \stoptyping

\unexpanded\def\startpagefigure
  {\dodoubleempty\dostartpagefigure}

\def\dostartpagefigure[#1][#2]%
  {\bgroup
   \getparameters[\??ex][\c!offset=\v!overlay,#2]%
   \startTEXpage[\c!offset=\@@exoffset]%
     \externalfigure[#1][#2]\ignorespaces} % so we can put some text below the graphic

\unexpanded\def\stoppagefigure
  {\stopTEXpage
   \egroup}

\def\pagefigure
  {\dodoubleempty\dopagefigure}

\def\dopagefigure[#1][#2]%
  {\dostartpagefigure[#1][#2]\stoppagefigure}

\protect \endinput