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%D \module
%D [ file=meta-pag,
%D version=1999.07.10,
%D title=\METAPOST\ Graphics,
%D subtitle=Initialization,
%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.
%D These definitions used to be part of the old \type
%D {core-mps} file, later changed into \type {meta-ini}, but
%D keeping them separate is cleaner.
\writestatus{loading}{MetaPost Graphics / Page Data Management}
\unprotect
%D The next few macros tell \METAPOST\ how the \CONTEXT\
%D pagebody looks.
\startMPextensions
boolean PageStateAvailable,OnRightPage,InPageBody;
PageStateAvailable:=true;
\stopMPextensions
\startMPinitializations
OnRightPage:=true;
InPageBody:=\ifinpagebody true \else false \fi;
\stopMPinitializations
\startMPinitializations
CurrentColumn:=\number\mofcolumns;
NOfColumns:=\number\nofcolumns;
% todo: ColumnDistance
\stopMPinitializations
% maybe always set as frozen anyway
\startMPinitializations
OnRightPage:=\MPonrightpage;
OnOddPage:=\MPonoddpage;
RealPageNumber:=\the\realpageno;
PageNumber:=\the\pageno;
NOfPages:=\lastpage;
PaperHeight:=\the\paperheight;
PaperWidth:=\the\paperwidth;
PrintPaperHeight:=\the\printpaperheight;
PrintPaperWidth:=\the\printpaperwidth;
TopSpace:=\the\topspace;
BottomSpace:=\the\bottomspace;
BackSpace:=\the\backspace;
CutSpace:=\the\cutspace;
MakeupHeight:=\the\makeupheight;
MakeupWidth:=\the\makeupwidth;
TopHeight:=\the\topheight;
TopDistance:=\the\topdistance;
HeaderHeight:=\the\headerheight;
HeaderDistance:=\the\headerdistance;
TextHeight:=\the\textheight;
FooterDistance:=\the\footerdistance;
FooterHeight:=\the\footerheight;
BottomDistance:=\the\bottomdistance;
BottomHeight:=\the\bottomheight;
LeftEdgeWidth:=\the\leftedgewidth;
LeftEdgeDistance:=\the\leftedgedistance;
LeftMarginWidth:=\the\leftmarginwidth;
LeftMarginDistance:=\the\leftmargindistance;
TextWidth:=\the\textwidth;
RightMarginDistance:=\the\rightmargindistance;
RightMarginWidth:=\the\rightmarginwidth;
RightEdgeDistance:=\the\rightedgedistance;
RightEdgeWidth:=\the\rightedgewidth;
InnerMarginDistance:=\the\innermargindistance;
InnerMarginWidth:=\the\innermarginwidth;
OuterMarginDistance:=\the\outermargindistance;
OuterMarginWidth:=\the\outermarginwidth;
InnerEdgeDistance:=\the\inneredgedistance;
InnerEdgeWidth:=\the\inneredgewidth;
OuterEdgeDistance:=\the\outeredgedistance;
OuterEdgeWidth:=\the\outeredgewidth;
PageOffset:=\the\pagebackgroundoffset;
PageDepth:=\the\pagebackgrounddepth;
LayoutColumns:=\the\layoutcolumns;
LayoutColumnDistance:=\the\layoutcolumndistance;
LayoutColumnWidth:=\the\layoutcolumnwidth;
\stopMPinitializations
\def\MPonrightpage{true}
\def\MPonoddpage {true}
\def\freezeMPpagelayout
{\edef\MPonrightpage{\doifbothsides {tru}{tru}{fals}e}%
\edef\MPonoddpage {\doifoddpageelse {tru}{fals}e}}
%D We need to freeze the pagelayout before the backgrounds
%D are build, because the overlay will temporarily become
%D zero (overlay).
\appendtoks
\freezeMPpagelayout
\to \everybeforepagebody
%D By freezing these value every graphic, we can use layout
%D variables that change halfways a page, whatever use that
%D has.
% obsolete (but keep the code)
%
% \prependtoks
% \calculatereducedvsizes % this is really needed
% \freezeMPpagelayout
% \freezeMPlayout % to be used grouped
% \to \everyMPgraphic
\prependtoks
\calculatereducedvsizes % this is really needed
\to \everyMPgraphic
\protect \endinput
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