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%D \module
%D [ file=page-pls,
%D version=2003.03.16,
%D title=\CONTEXT\ Page Macros,
%D subtitle=Page Setup,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright=PRAGMA-ADE]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\ifx\pageareabox\undefined \else \endinput \fi
\writestatus{loading}{ConTeXt Page Macros / Extra Page Building}
%D This feature has been present for a while but has never been
%D exploited: pluggable pagebuilders. The next example code
%D demonstrates the application of one such a plug-in. This variant
%D support \type {page}, \type {leftpage} and \type {rightpage}
%D definitions where specific areas are placed with the \type
%D {\pagearea} command.
%D
%D \starttyping
%D \setupheadertexts[the header text]
%D \setupfootertexts[a pretty long left footer text][something right]
%D \setupbottomtexts[a not so long bottom text][another right thing]
%D \setuptexttexts [margin][something marginal][indeed]
%D
%D \startpagelayout[leftpage]
%D \setupTABLE[offset=overlay]
%D \setupTABLE[c][1][width=\leftmarginwidth]
%D \bTABLE
%D \bTR
%D \bTD[nx=3,background=color,backgroundcolor=green]
%D \pagearea[header][text][middle]
%D \eTD
%D \eTR
%D \bTR
%D \bTD \pagearea[text][margin][left] \eTD
%D \bTD[nx=2] \pagearea[text] \eTD
%D \eTR
%D \bTR
%D \bTD[nx=3,offset=overlay]
%D {\bTABLE[width=.5\hsize]
%D \bTR
%D \bTD \pagearea[footer][text][left] \eTD
%D \bTD \pagearea[bottom][text][left] \eTD
%D \eTR
%D \eTABLE}
%D \eTD
%D \eTR
%D \eTABLE
%D \stoppagelayout
%D
%D \startpagelayout[rightpage]
%D \setupTABLE[offset=overlay]
%D \setupTABLE[c][1][width=\rightmarginwidth]
%D \bTABLE
%D \bTR
%D \bTD[nx=3] \pagearea[header][text][middle] \eTD
%D \eTR
%D \bTR
%D \bTD \pagearea[text][margin][left] \eTD
%D \bTD[nx=2] \pagearea[text] \eTD
%D \eTR
%D \bTR
%D \bTD[nx=3,offset=overlay]
%D {\bTABLE[width=.5\hsize]
%D \bTR
%D \bTD \pagearea[bottom][text][right] \eTD
%D \bTD \pagearea[footer][text][right] \eTD
%D \eTR
%D \eTABLE}
%D \eTD
%D \eTR
%D \eTABLE
%D \stoppagelayout
%D
%D \setupcolors[state=start]
%D
%D \setupbackgrounds[text][background=color,backgroundcolor=blue]
%D \setupbackgrounds[header][text][background=color,backgroundcolor=red]
%D
%D \setuppagenumbering[alternative=doublesided,location=]
%D
%D \setuplayout[method=makeup]
%D
%D \definetextbackground
%D [test]
%D [state=start,
%D background=color,
%D backgroundcolor=yellow]
%D
%D \starttext
%D
%D \dorecurse{10}{\input tufte \par}
%D
%D \input tufte \starttest \input tufte \stoptest \input tufte
%D
%D \starttabulate
%D \NC test \NC \starttest \input tufte \stoptest \NC \NR
%D \stoptabulate
%D
%D \dorecurse{10}{\input tufte \par}
%D
%D \stoptext
%D \stoptyping
\unprotect
\setvalue{\??ly\c!method\v!makeup}#1#2%
{\setbox\pagebox\hbox
{\vbox to \textheight
{\offinterlineskip
% optie
\vskip\dimexpr-1\topskip+\strutheight\relax
%
\textwidth\makeupwidth
\hsize\textwidth
\boxmaxdepth\maxdepth
\noindent
\dopagecontents#1#2}}%
\wd\pagebox\makeupwidth
\ht\pagebox\textheight
\dp\pagebox\zeropoint
\hsize\paperwidth
\vsize\paperheight
\setbox\pagebox\vbox
{\doifbothsidesoverruled
{\let\!!stringa\v!page}
{\let\!!stringa\v!rightpage}
{\let\!!stringa\v!leftpage}%
\getvalue{\??ly\c!method:\!!stringa}}%
\wd\pagebox\paperwidth
\ht\pagebox\paperheight
\dp\pagebox\zeropoint}
\newbox\pageareabox
\def\pagearea
{\dotripleempty\dopagearea}
\def\dopagearea[#1][#2][#3]%
{\ifthirdargument
\doifelse{#3}\v!left
{\dodopagearea{#1}{#2}\c!lefttext}
{\doifelse{#3}\v!right
{\dodopagearea{#1}{#2}\c!righttext}
{\dodopagearea{#1}{#2}\c!middletext}}%
\else\ifsecondargument
\doifbothsidesoverruled
{\dodopagearea{#1}{#2}\c!righttext}
{\dodopagearea{#1}{#2}\c!righttext}
{\dodopagearea{#1}{#2}\c!lefttext }%
\else
\doif{#1}\v!text % copy due to trial runs in TABLE
{\iftrialtypesetting
\copy\pagebox
\else
\localpositioningfalse
\addtextbackground\pagebox
\addtextgridlayer\pagebox
\box\pagebox
\fi}%
\fi\fi}
\def\dodopagearea#1#2#3%
{\setbox\pageareabox\vbox{\getvalue{\??tk#1#2#3}}%
\ifsomebackgroundfound{#1#2}%
\iftrialtypesetting
\box\pageareabox
\else
\localframed
[\??ma#1#2]
[\c!width=\wd\pageareabox,
\c!height=\ht\pageareabox,
\c!offset=\v!overlay]
{\box\pageareabox}%
\fi
\else
\box\pageareabox
\fi}
\setvalue{\??ly\c!method:\v!leftpage }{\getvalue{\??ly\c!method:\v!page}}
\setvalue{\??ly\c!method:\v!rightpage}{\getvalue{\??ly\c!method:\v!page}}
% \long\unexpanded\def\startpagelayout[#1]#2\stoppagelayout
% {\long\setvalue{\??ly\c!method:#1}{#2}}
\long\unexpanded\def\startpagelayout
{\bgroup\catcode\endoflineasciicode\ignorecatcode\dostartpagelayout}
\long\def\dostartpagelayout[#1]#2\stoppagelayout
{\egroup\long\setvalue{\??ly\c!method:#1}{#2}}
\protect \endinput
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