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%D \module
%D [ file=tabl-mis,
%D version=2012.06.28,
%D title=\CONTEXT\ Table Macros,
%D subtitle=Miscellaneous,
%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 Table Macros / Miscellaneous}
\unprotect
%D \macros
%D {somekindoftab,kindoftabposition}
%D
%D This macro can be used to create tabs:
%D
%D \starttyping
%D \setupheadertexts[{\somekindoftab[alternative=horizontal]{\framed{\kindoftabposition}}}]
%D \setuptexttexts [{\somekindoftab[alternative=vertical] {\framed{\kindoftabposition}}}]
%D
%D \starttext
%D \showframe \dorecurse{10}{test\page}
%D \stoptext
%D \stoptyping
%D
%D (This rather old but updated code used to be in \type {core-mis.mkiv}.)
\mutable\let\kindoftabposition\!!zerocount
\permanent\tolerant\protected\def\somekindoftab[#1]%
{\bgroup
\getdummyparameters
[\c!alternative=\v!vertical,
\c!width=\textwidth,\c!height=\textheight,
\c!n=\lastpage,\c!m=\realpageno,
#1]%
\doifelse{\directdummyparameter\c!alternative}\v!vertical
{\typo_kindoftab_indeed\vbox\vskip\c!height}
{\typo_kindoftab_indeed\hbox\hskip\c!width }}
\def\typo_kindoftab_indeed#1#2#3#4%
{#1 to \directdummyparameter#3 \bgroup
\forgetall
\scratchnx\directdummyparameter\c!n\relax
\scratchmx\directdummyparameter\c!m\relax
\edef\kindoftabposition{\the\scratchmx}%
\ifnum\scratchmx>\plusone
#2\zeropoint \s!plus \the\numexpr\scratchmx-\plusone \relax\s!fill\relax
\fi
#4% can use \kindoftabposition
\ifnum\scratchmx<\scratchnx\relax
#2\zeropoint \s!plus \the\numexpr\scratchnx-\scratchmx\relax\s!fill\relax
\fi
\egroup
\egroup}
%D The following paragraphs mechanism is probably one of the oldest of \CONTEXT\ and
%D mostly served as a table mechanism capable of dealing with paragraphs. Nowadays
%D one can also use tabulate or natural tables.
%D
%D \startbuffer
%D \defineparagraphs[sample][n=2,rule=on]
%D
%D \startsample
%D first \nextsample
%D second \nextsample
%D third
%D \stopsample
%D
%D \startsample
%D \input tufte \nextsample
%D \input ward \nextsample
%D \input davis \nextsample
%D \input zapf
%D \stopsample
%D
%D \startparagraphs[sample]
%D first \nextsample
%D second \nextsample
%D third
%D \stopparagraphs
%D
%D \startparagraphs[sample]
%D \startparagraphscell
%D first
%D \stopparagraphscell
%D \startparagraphscell
%D second
%D \stopparagraphscell
%D \startparagraphscell
%D third
%D \stopparagraphscell
%D \stopparagraphs
%D \stopbuffer
%D
%D \typebuffer \getbuffer
\installcorenamespace{paragraphs}
\installframedcommandhandler \??paragraphs {paragraphs} \??paragraphs
\setupparagraphs
[\c!n=3,
\c!offset=\zeropoint,
\c!before=\blank,
\c!after=\blank,
\c!distance=\emwidth,
\c!height=\v!fit,
\c!width=\availablehsize,
\c!rule=\v!off,
\c!command=,
\c!align=,
\c!tolerance=\v!tolerant, % obsolete
\c!rulethickness=\linewidth,
\c!rulecolor=,
\c!style=,
\c!color=,
\c!frame=\v!off,
\c!top=\vss,
\c!bottom=\vfill]
\aliased\let\typo_paragraphs_setup_saved\setupparagraphs
\let\typo_paragraphs_setup_step\gobbleoneargument
\overloaded\permanent\tolerant\protected\def\setupparagraphs[#1]#*[#2]#*[#3]% we are downward compatible with [each] and [1,3]
{\ifarguments\or
\typo_paragraphs_setup_saved[#1]%
\or
\typo_paragraphs_setup_saved[#1][#2]%
\or
\doifelse{#2}\v!each
{\dorecurse{\namedparagraphsparameter{#1}\c!n}%
{\normalexpanded{\typo_paragraphs_setup_saved[#1:\recurselevel]}[#3]}}%
{\def\typo_paragraphs_setup_step##1{\typo_paragraphs_setup_saved[#1:##1][#3]}%
\processcommalist[#2]\typo_paragraphs_setup_step}%
\fi}
\appendtoks
\frozen\instance\letcsname\e!next\currentparagraphs\endcsname\nextparagraphs
\frozen\instance\letcsname\currentparagraphs\endcsname\nextparagraphs
\frozen\instance\protected\edefcsname\e!start\currentparagraphs\endcsname{\startparagraphs[\currentparagraphs]}%
\frozen\instance\letcsname\e!stop\currentparagraphs\endcsname\stopparagraphs
%frozen\instance\setuevalue{\e!setup\currentparagraph\e!endsetup}{\typo_paragraphs_setup_saved[\currentparagraphs]}%
\dorecurse{\paragraphsparameter\c!n}%
{\normalexpanded{\typo_paragraphs_setup_saved[\currentparagraphs:\recurselevel][\c!width=,\s!parent=\??paragraphs\currentparagraphs]}}%
\typo_paragraphs_setup_saved[\currentparagraphs:1][\c!distance=\zeropoint]%
\to \everydefineparagraphs
\newinteger \c_typo_paragraphs_n
\newinteger \c_typo_paragraphs_max
\newdimension\d_typo_paragraphs_width
\newdimension\d_typo_paragraphs_auto
\let\typo_paragraphs_start_cell\relax
\let\typo_paragraphs_stop_cell \relax
\permanent\protected\def\startparagraphs[#1]% quite slow
{\bgroup % (1)
\cdef\currentparagraphs{#1}%
% \paragraphsparameter\c!before
\edef\p_width{\paragraphsparameter\c!width}%
\ifempty\p_width
\d_typo_paragraphs_width\availablehsize
\else
\d_typo_paragraphs_width\p_width\relax
\fi
\advanceby\d_typo_paragraphs_width-2\dimexpr\paragraphsparameter\c!offset\relax
\c_typo_paragraphs_max\paragraphsparameter\c!n\relax
\d_typo_paragraphs_auto\d_typo_paragraphs_width\relax
\scratchcounter\zerocount
\dorecurse\c_typo_paragraphs_max
{\edef\p_width{\namedparagraphsparameter{\currentparagraphs:\recurselevel}\c!width}%
\ifempty\p_width
\advanceby\scratchcounter\plusone
\else
\advanceby\d_typo_paragraphs_auto-\p_width\relax
\fi
\ifnum\recurselevel>\plusone
\advanceby\d_typo_paragraphs_auto-\namedparagraphsparameter{\currentparagraphs:\recurselevel}\c!distance\relax
\fi}%
\ifnum\scratchcounter>\zerocount
\divideby\d_typo_paragraphs_auto\scratchcounter
\else
\d_typo_paragraphs_auto\zeropoint
\fi
\parindent\zeropoint
\c_typo_paragraphs_n\zerocount
\enforced\let\\\nextparagraphs % downward compatible
\edef\p_offset{\paragraphsparameter\c!offset}%
\doifelsedimension\p_offset
{\scratchoffset\p_offset}%
{\scratchoffset\zeropoint}%
\setbox\scratchbox\hpack
\bgroup % (2)
\forgetall
\advanceby\hsize-2\scratchoffset
\let\typo_paragraphs_start_cell\typo_paragraphs_start_cell_indeed
\let\typo_paragraphs_stop_cell \typo_paragraphs_stop_cell_indeed
\typo_paragraphs_start_cell_indeed}
\permanent\protected\def\stopparagraphs
{\stopparagraphscell
\egroup % (2)
\letparagraphsparameter\c!align\v!flushleft % normal
\paragraphsparameter\c!before
\dontleavehmode\inheritedparagraphsframed{\box\scratchbox}%
\paragraphsparameter\c!after
\egroup} % (1)
\permanent\protected\def\nextparagraphs
{\stopparagraphscell
\startparagraphscell}
\permanent\protected\def\startparagraphscell
{\typo_paragraphs_start_cell}
\def\typo_paragraphs_start_cell_indeed
{\removeunwantedspaces
\advanceby\c_typo_paragraphs_n\plusone
\ifnum\c_typo_paragraphs_n>\c_typo_paragraphs_max
\expandafter\typo_paragraphs_start_cell_nop
\else
\expandafter\typo_paragraphs_start_cell_yes
\fi}
\def\typo_paragraphs_start_cell_nop
{\begingroup
% message: too many cells in paragraphs
\let\typo_paragraphs_start_cell\relax
\let\typo_paragraphs_stop_cell\typo_paragraphs_stop_cell_indeed
\setbox\scratchbox\vbox\bgroup}
\def\typo_paragraphs_start_cell_yes
{\begingroup
\let\typo_paragraphs_start_cell\relax
\let\typo_paragraphs_stop_cell\typo_paragraphs_stop_cell_indeed
\cdef\currentparagraphs{\currentparagraphs:\the\c_typo_paragraphs_n}%
\ifnum\c_typo_paragraphs_n>\plusone
\typo_paragraphs_separator
\fi
\edef\p_height{\paragraphsparameter\c!height}%
\edef\p_width {\paragraphsparameter\c!width }%
\useparagraphsstyleandcolor\c!style\c!color
\setbox\scratchbox\vtop \ifempty\p_height \orelse\ifx\p_height\v!fit \else to \p_height \fi
\bgroup % (2)
\blank[\v!disable]%
\paragraphsparameter\c!top
\hsize\ifempty\p_width \d_typo_paragraphs_auto \else \p_width \fi \relax
\usealignparameter\paragraphsparameter
\paragraphsparameter\c!inner
\everypar{\begstrut\everypar\emptytoks}%
\ignorespaces
\paragraphsparameter\c!command}
\permanent\protected\def\stopparagraphscell
{\typo_paragraphs_stop_cell
\let\typo_paragraphs_stop_cell\relax}
\def\typo_paragraphs_stop_cell_indeed
{\ifnum\c_typo_paragraphs_n>\c_typo_paragraphs_max
\expandafter\typo_paragraphs_stop_cell_nop
\else
\expandafter\typo_paragraphs_stop_cell_yes
\fi}
\def\typo_paragraphs_stop_cell_nop
{\egroup
\endgroup}
\def\typo_paragraphs_stop_cell_yes
{\ifvmode
\removelastskip
\else
\removeunwantedspaces
\endstrut
\endgraf
\fi
\paragraphsparameter\c!bottom
\egroup % (2)
\dontleavehmode\hpack{\raise\strutheight\box\scratchbox}%
\endgroup}
\def\typo_paragraphs_separator
{\scratchdistance\paragraphsparameter\c!distance
\doif{\paragraphsparameter\c!rule}\v!on
{\scratchwidth\paragraphsparameter\c!rulethickness
\scratchdistance\dimexpr(\scratchdistance-\scratchwidth)/2\relax
\hskip\scratchdistance
\color[\paragraphsparameter\c!rulecolor]{\vrule\s!width\scratchwidth}}%
\hskip\scratchdistance}
\protect \endinput
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