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%D \module
%D [ file=core-nte,
%D version=2009.03.08,
%D title=\CONTEXT\ Table Macros,
%D subtitle=Natural Tables Extensions,
%D author=Hans Hagen \& Wolfgang Schuster,
%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 Table Module / Natural Tables Extensions}
\unprotect
%D This module is suggested by Wolfgang Schuster who also prototyped
%D it and came up with the rationale:
%D
%D This module provides an easy way to use natural in a similiar
%D way as the older table module (based on the \TABLE\ macros) and
%D the newer tabulate module.
%D
%D You can see the advantage in the following table, once created
%D with the new macros and once with the normal macros provided
%D with the natural table module.
%D
%D Let us start with the original macros:
%D
%D \startbuffer
%D \bTABLE
%D \bTR
%D \bTD Text 1 \eTD
%D \bTD Text 2 \eTD
%D \eTR
%D \bTR
%D \bTD Text 3 \eTD
%D \bTD Text 4 \eTD
%D \eTR
%D \eTABLE
%D \stopbuffer
%D
%D \typebuffer \getbuffer
%D
%D Watch how the new macros use less code:
%D
%D \startbuffer
%D \startTABLE
%D \NC Text 1 \NC Text 2 \NC\NR
%D \NC Text 3 \NC Text 4 \NC\NR
%D \stopTABLE
%D \stopbuffer
%D
%D \typebuffer \getbuffer
%D
%D The actual code differs from the prototype that it does not need
%D to collect whole rows and parse them but looks ahead instead.
\newconditional\c_tabl_nte_in_nc
\unexpanded\def\startTABLE
{\dosingleempty\tabl_nte_start}
\def\tabl_nte_start[#1]%
{\bgroup
\bTABLE[#1]%
\let\NC\tabl_nte_start_nc
\let\NR\tabl_nte_start_nr
\let\bTR\relax
\let\bTD\relax
\let\bTH\relax
\let\bTN\relax}
\unexpanded\def\stopTABLE
{\eTABLE
\egroup}
\unexpanded\def\tabl_nte_start_nr
{\eTR
\setfalse\c_tabl_nte_in_nc}
\unexpanded\def\tabl_nte_start_nc
{\futurelet\next\tabl_nte_start_nc_indeed}
\def\tabl_nte_start_nc_indeed
{\ifx\next\tabl_nte_start_nr \else
\expandafter\tabl_nte_start_nc_finish
\fi}
\def\tabl_nte_start_nc_finish#1\NC
{\ifconditional\c_tabl_nte_in_nc \else
\settrue\c_tabl_nte_in_nc
\dobTR[]%
\fi
\dobTD#1\eTD\NC}
%D The related structure commands are also available:
\unexpanded\def\startTABLEhead{\dosingleempty\tabl_nte_start_head} \let\stopTABLEhead\relax
\unexpanded\def\startTABLEnext{\dosingleempty\tabl_nte_start_next} \let\stopTABLEnext\relax
\unexpanded\def\startTABLEbody{\dosingleempty\tabl_nte_start_body} \let\stopTABLEbody\relax
\unexpanded\def\startTABLEfoot{\dosingleempty\tabl_nte_start_foot} \let\stopTABLEfoot\relax
\def\tabl_nte_start_head[#1]#2\stopTABLEhead{\appendtoks\tabl_ntb_section[#1]{#2}\to\t_tabl_ntb_head}
\def\tabl_nte_start_next[#1]#2\stopTABLEnext{\appendtoks\tabl_ntb_section[#1]{#2}\to\t_tabl_ntb_next}
\def\tabl_nte_start_body[#1]#2\stopTABLEbody{\appendtoks\tabl_ntb_section[#1]{#2}\to\t_tabl_ntb_body}
\def\tabl_nte_start_foot[#1]#2\stopTABLEfoot{\appendtoks\tabl_ntb_section[#1]{#2}\to\t_tabl_ntb_foot}
\protect \endinput
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