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%D \module
%D [ file=node-bck,
%D version=2009.06.08,
%D title=\CONTEXT\ Node Macros,
%D subtitle=Backgrounds,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright=PRAGMA]
%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 Node Support / Backgrounds}
%D This is first attempt to replacing backgrounds in a few
%D tables mechanisms.
\unprotect
\registerctxluafile{node-bck}{1.001}
%D Box helpers:
\def\doaddbackgroundtobox#1[#2]%
{\begingroup\faststartcolor[#2]%
\normalexpanded{\noexpand\faststopcolor\endgroup#1
attr \backgroundattribute \plusone
attr \colormodelattribute \the\attribute\colormodelattribute
attr \colorattribute \the\attribute\colorattribute
attr \transparencyattribute \the\attribute\transparencyattribute}}
\def\backgroundvbox{\doaddbackgroundtobox\vbox}
\def\backgroundvtop{\doaddbackgroundtobox\vtop}
\def\backgroundhbox{\doaddbackgroundtobox\hbox}
\def\colorattr#1%
{\ifcsname(cs:\currentpalet#1)\endcsname
\thecolorattr{\currentpalet#1}%
\else\ifcsname(cs:#1)\endcsname
\thecolorattr{#1}%
\fi\fi}
\def\thecolorattr#1%
{attr \colormodelattribute \attribute\colormodelattribute
attr \colorattribute \csname(cs:#1)\endcsname
attr \transparencyattribute \csname(ts:#1)\endcsname}
\def\backgroundcolorattr#1%
{\ifcsname(cs:\currentpalet#1)\endcsname
\thebackgroundcolorattr{\currentpalet#1}%
\else\ifcsname(cs:#1)\endcsname
\thebackgroundcolorattr{#1}%
\fi\fi}
\def\thebackgroundcolorattr#1%
{attr \backgroundattribute \plusone
attr \colormodelattribute \attribute\colormodelattribute
attr \colorattribute \csname(cs:#1)\endcsname
attr \transparencyattribute \csname(ts:#1)\endcsname}
% \def\backgroundvbox[#1]{\vbox \backgroundcolorattr{#1}}
% \def\backgroundvtop[#1]{\vtop \backgroundcolorattr{#1}}
% \def\backgroundhbox[#1]{\hbox \backgroundcolorattr{#1}}
%D tabulate:
\def\tabulatenormalcolumn#1%
{\doiffastoptionalcheckelse{\tabulatenormalcolumnyes#1}{\tabulatenormalcolumnnop#1}}
\def\tabulatenormalcolumnnop#1% overloads anch-pgr
{&\iftabulateequal\tabulateequalpos\else\tabulatenormalpos\fi&\global\chardef\tabulatetype#1&}
\def\tabulatenormalcolumnyes#1[#2]%
{&\iftabulateequal\tabulateequalpos\else\tabulatenormalpos\fi&\global\chardef\tabulatetype#1&%
\iftrialtypesetting\else\settabulatecolor{#2}\fi\ignorespaces}
\newcount\maxtabularcolorcolumn
\def\settabulatecolor#1% we could store the attributes at the cost of a lua call
{\begingroup
\global\settrue\tabulatehascolors
\ifnum\tabulatecolumn>\maxtabularcolorcolumn
\global\maxtabularcolorcolumn\tabulatecolumn
\fi
\setxvalue{\??tt:c:\the\tabulatecolumn}{#1}%
\attribute\backgroundattribute\plusone
\faststartcolor[#1]\strut\char0\faststopcolor
\endgroup}
\def\repeatsettabulatecolor
{\begingroup
\ifcsname\??tt:c:\the\tabulatecolumn\endcsname
\attribute\backgroundattribute\plusone
\faststartcolor[\csname\??tt:c:\the\tabulatecolumn\endcsname]\strut\char0\faststopcolor
\fi
\endgroup}
\def\resettabulatecolors
{\ifcase\maxtabularcolorcolumn\else
\doresettabulatecolors
\fi}
\def\doresettabulatecolors
{\dorecurse\maxtabularcolorcolumn{\letgvalue{\??tt:c:\recurselevel}\undefined}} % slow
\appendtoks
\resettabulatecolors
\to \everyaftertabulaterow
\def\splitofftabulatebox % overloads in anch-pgr
{\dontcomplain
\global\setbox\tabulatebox % % % global ? % % %
\vsplit\tablebox\tabulatecolumn to \lineheight
\setbox\tabulatebox\normalvbox
{\unvbox\tabulatebox}%
\setbox\tabulatebox\hbox to \wd\tabulatebox
{\iftrialtypesetting\else\ifconditional\tabulatehascolors\repeatsettabulatecolor\fi\fi
\hss\dotabulatehook{\box\tabulatebox}\hss}%
\ht\tabulatebox\strutht
\dp\tabulatebox\strutdp
\box\tabulatebox
\iftrialtypesetting\else\ifconditional\tablehaspositions\doflushtabulateepos\fi\fi}
\appendtoks
\global\setfalse\tabulatehascolors
\to \everytabulate
\protect \endinput
% test
\starttext
\backgroundvbox[green] {\input tufte } \par
\backgroundvbox[blue] {\input ward } \par
\backgroundvbox[red] {\input knuth } \par
\backgroundhbox[yellow]{\rotate[rotation=45]{hello world}} \par
\starttabulate[||p||]
\NC test \NC test \NC test \NC \NR
\NC test \NC[green] \input tufte \NC[yellow] test \NC \NR
\NC test \NC test \NC test \NC \NR
\NC test \NC test \NC test \NC \NR
\NC test \NC test \NC test \NC \NR
\NC test \NC test \NC test \NC \NR
\NC[blue] test \NC[red] test \NC test \NC \NR
\NC test \NC test \NC test \NC \NR
\NC test \NC test \NC test \NC \NR
\NC test \NC test \NC test \NC \NR
\NC test \NC test \NC[gray] test \NC \NR
\NC test \NC test \NC test \NC \NR
\NC test \NC test \NC test \NC \NR
\NC[blue] test \NC test \NC test \NC \NR
\NC test \NC test \NC test \NC \NR
\NC test \NC test \NC[magenta] test \NC \NR
\NC test \NC test \NC test \NC \NR
\NC test \NC[cyan] \dorecurse{10}{\input ward }\NC test \NC \NR
\NC test \NC test \NC test \NC \NR
\NC test \NC[yellow] test \NC test \NC \NR
\stoptabulate
\stoptext
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