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%D \module
%D [ file=tabl-tsp,
%D version=2000.10.20,
%D title=\CONTEXT\ Table Macros,
%D subtitle=Splitting,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%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 / Splitting}
%D The code in this file is move here from other places.
\unprotect
% only to be used with single tokens (will be prim)
\ifx\htdp\undefined \def\htdp#1{\dimexpr\ht#1+\dp#1\relax} \fi
%D Although the name resembles floats, and therefore this should be
%D a page module, we decided to make it core functionality because the
%D table code depends on it. Othrwise there would be too much
%D overloading afterwards involved. Actually, the float part is rather
%D generic and not that related to floats.
% \splitfloat [settings] {\placetable[optional args]{test}} {content}
% \def\s!noftablesplits{nofsplittables}
\definenumber % we need a nicer name like nofsplittables, we then also need to set \s!parent
[\??si]
[\c!way=\v!by\v!text,
\c!conversion=\@@siconversion]
\unexpanded\def\setupfloatsplitting
{\dodoubleargument\getparameters[\??si]}
\newif\ifinsidesplitfloat % will become chardef
\newtoks \everysplitfloatsetup
\def\splitfloat
{\dosingleempty\dosplitfloat}
\ifx\floatcaptionsuffix\undefined \else
\let\floatcaptionsuffix\empty % will become \splitfloatcaptionsuffix
\fi
\def\extrasplitfloatlines{0}
\def\dosplitfloat[#1]#2% nog dubbele refs
{\bgroup
\global\setfalse\splitfloatdone
\aftergroup\checksplitfloat
\insidefloattrue
\insidesplitfloattrue
\getparameters[\??si][#1]%
\resetnumber[\??si]%
\def\floatcaptionsuffix{\convertednumber[\??si]}%
\let\extrasplitfloatlines\@@silines
\the\everysplitfloatsetup
\def\splitfloatcommand{#2}%
\global\settrue \onlyonesplitofffloat
\global\setfalse\somenextplitofffloat
\dopushsavedfloats
\@@sibefore
\let\next} % \bgroup
\def\checksplitfloat
{\ifconditional\splitfloatdone\else
\blank{\tttf \getmessage\m!floatblocks{13}\empty}\blank
\showmessage\m!floatblocks{13}\empty
\fi}
\settrue \onlyonesplitofffloat
\setfalse\somenextplitofffloat
%D When \type {inbetween} is made empty instead of the
%D default \type {\page}, we will get delayed flushing
%D and text may continue below the graphic.
%D
%D \starttyping
%D \dorecurse{2}{\input tufte }
%D
%D \splitfloat[lines=auto,inbetween=]
%D {\placetable{\dorecurse{5}{test\recurselevel\endgraf}}}
%D {\bTABLE[split=yes]
%D \bTR \bTD 11 \eTD \bTD \input tufte \eTD \eTR
%D \bTR \bTD 12 \eTD \bTD \input zapf \eTD \eTR
%D \bTR \bTD 13 \eTD \bTD \input bryson \eTD \eTR
%D \bTR \bTD 14 \eTD \bTD test \eTD \eTR
%D \bTR \bTD 21 \eTD \bTD \input tufte \eTD \eTR
%D \bTR \bTD 22 \eTD \bTD \input zapf \eTD \eTR
%D \bTR \bTD 23 \eTD \bTD \input bryson \eTD \eTR
%D \bTR \bTD 24 \eTD \bTD test \eTD \eTR
%D \bTR \bTD 31 \eTD \bTD \input tufte \eTD \eTR
%D \bTR \bTD 32 \eTD \bTD \input zapf \eTD \eTR
%D \bTR \bTD 33 \eTD \bTD \input bryson \eTD \eTR
%D \bTR \bTD 34 \eTD \bTD test \eTD \eTR
%D \eTABLE}
%D
%D \dorecurse{10}{\input tufte }
%D \stoptyping
\newconditional\splitfloatdone
\def\dodowithsplitofffloat
{\dowithnextbox
{\forgetall
\dontcomplain
\global\settrue\splitfloatdone
\chardef\nodelocationmode\zerocount % bypass auto-renumbering
\incrementnumber[\??si]%
\ifcase\rawnumber[\??si]\or \ifconditional\onlyonesplitofffloat
\let\floatcaptionsuffix\empty
\fi \fi
\bgroup
\ifconditional\somenextplitofffloat
\settrue\retainfloatnumber
\notesenabledfalse % best here, experimental, brrr; test with note in caption
\else
\setfalse\retainfloatnumber
\fi
\splitfloatcommand{\box\nextbox}%
\egroup
\ifconditional\somenextplitofffloat
\doifelsenothing\@@siinbetween
{\ifconditional\splitfloatfirstdone\else\page\fi}
\@@siinbetween
\else
\@@siafter
\dopopsavedfloats
\doflushsavedfloats
\fi
\global\settrue\splitfloatfirstdone}%
\vbox}
\def\nodowithsplitofffloat
{\dowithnextbox
{\forgetall
\dontcomplain
\box\nextbox % maybe an option to unvbox
\global\settrue\splitfloatfirstdone}%
\vbox}
\def\dochecksplitofffloat#1% box
{\ifinsidesplitfloat
\ifdim\ht#1=\zeropoint
\global\setfalse\somenextplitofffloat
\else
\global\settrue \somenextplitofffloat
\global\setfalse\onlyonesplitofffloat
\fi
\fi}
\def\analyzesplitfloatcaption#1% depends on page-flt
{\doif\extrasplitfloatlines\v!auto
{\bgroup
\settrue\retainfloatnumber
\chardef\nodelocationmode\zerocount
\forcelocalfloats
\setuplocalfloats[\c!before=,\c!after=,\c!inbetween=]%
\splitfloatcommand{\hbox to \wd#1{\strut}}% dummy line
\setbox\scratchbox\vbox{\flushlocalfloats}%
\getnoflines{\ht\scratchbox}%
\resetlocalfloats
\advance\noflines\minusone % compensate dummy line
\expanded{\egroup\noexpand\edef\noexpand\extrasplitfloatlines{\the\noflines}}}}
% \def\analyzesplitfloatcaption#1%
% {\edef\extrasplitfloatlines{11}}
\def\dowithsplitofffloat % nextbox
{\ifinsidesplitfloat
\expandafter\dodowithsplitofffloat
\else
\expandafter\nodowithsplitofffloat
\fi}
\def\doifnotinsidesplitfloat
{\ifinsidesplitfloat\expandafter\gobbleoneargument\fi}
%D Some defaults:
\setupfloatsplitting
[\c!conversion=\v!character, % \v!romannumerals
\c!lines=3,
\c!before=,
\c!inbetween=\page,
\c!after=]
%D Table splitter, on top of previous code:
\newbox\tsplitcontent
\newbox\tsplitresult
\newbox\tsplithead
\newbox\tsplitnext
\newbox\tsplittail
\def\resettsplit{% only \def's starting a a new line are seen by the dep checker
\def\tsplitminimumfreelines{0}%
\def\tsplitminimumfreespace{0pt}%
\setbox\tsplitcontent \vbox{}%
\setbox\tsplitresult \vbox{}%
\setbox\tsplithead \vbox{}%
\setbox\tsplitnext \vbox{}%
\setbox\tsplittail \vbox{}%
\let\tsplitbeforeresult\donothing
\let\tsplitafterresult \donothing
\let\tsplitinbetween \donothing
\let\tsplitbefore \donothing
\let\tsplitafter \donothing
\let\postprocesstsplit \donothing
}
\resettsplit
% todo: keep tail to rest, so we need a lookahead
\newconditional\splitfloatfirstdone
\def\handletsplit
{\analyzesplitfloatcaption\tsplitcontent
\global\setfalse\splitfloatfirstdone
\testpagesync % new, sync, but still tricky
[\tsplitminimumfreelines]
[\dimexpr\tsplitminimumfreespace+\extrasplitfloatlines\lineheight\relax]%
\setbox\scratchbox\vbox{\tsplitinbetween}%
\edef\tsplitinbetweenheight{\the\htdp\scratchbox}% etex
\!!doneafalse
\doloop
{\ifinsidecolumns
% brrr, assumes empty columns
\global\setfalse\splitfloatfirstdone
\scratchdimen\textheight
\!!donectrue
\else
\ifconditional\splitfloatfirstdone
\scratchdimen\textheight
\!!donectrue
\else\ifdim\pagegoal<\maxdimen
\scratchdimen\dimexpr\pagegoal-\pagetotal\relax
\!!donecfalse
\else
\scratchdimen\textheight
\!!donectrue
\fi\fi
\fi
\scratchdimen\dimexpr\scratchdimen-\tsplitinbetweenheight-\tsplitminimumfreespace-\extrasplitfloatlines\lineheight\relax
\ifdim\htdp\tsplittail>\zeropoint
\advance\scratchdimen-\htdp\tsplittail
\fi
\setbox\tsplitresult\vbox
{\ifdim\ht\tsplithead>\zeropoint
\unvcopy\tsplithead
\tsplitinbetween
\fi}%
\if!!donea\else\ifdim\ht\tsplitnext>\zeropoint
\setbox\tsplithead\box\tsplitnext
\fi\fi
\!!doneatrue
\ifdim\ht\tsplitresult>\zeropoint
\!!donedtrue % table head
\else
\!!donedfalse % no tablehead
\fi
\splittopskip\zeropoint
\doloop
{\setbox\scratchbox\vsplit\tsplitcontent to \onepoint % \lineheight
\setbox\scratchbox\vbox{\unvbox\scratchbox}%
\ifdim\dimexpr\scratchdimen-\htdp\scratchbox-\htdp\tsplitresult\relax>\zeropoint
\setbox\tsplitresult\vbox
{\unvbox\tsplitresult
\tsplitinbetween
\unvbox\scratchbox}%
\ifvoid\tsplitcontent \exitloop \fi
\else\if!!doned
% we only have a tablehead so far
\setbox\tsplitresult\vbox{\unvbox\tsplitresult\unvbox\scratchbox}%
\exitloop
\else\if!!donec
% we have text height available, but the (one) cell is too
% large to fit, so, in order to avoid loops/deadcycles we do:
\setbox\tsplitresult\vbox
{\unvbox\tsplitresult
\tsplitinbetween
\unvbox\scratchbox}%
\exitloop
\else
\setbox\tsplitcontent\vbox
{\unvbox\scratchbox
\tsplitinbetween
\ifvoid\tsplitcontent\else\unvbox\tsplitcontent\fi}%
\exitloop
\fi\fi\fi
\!!donedfalse
\!!donecfalse}%
\postprocesstsplit
\dochecksplitofffloat\tsplitcontent
\ifvoid\tsplitcontent
\setbox\tsplitresult\vbox
{\unvbox\tsplitresult
\tsplitinbetween
\unvcopy\tsplittail}%
\dowithsplitofffloat{\tsplitbeforeresult\box\tsplitresult\tsplitafterresult}%
\doifnotinsidesplitfloat\tsplitafter
\endgraf
\exitloop
\else
% hack
\ifdim\pagegoal<\maxdimen
\global\pagegoal\dimexpr\pagegoal+\lineheight\relax % etex
\fi
% brrr
\ifdim\ht\tsplitresult>\zeropoint
\setbox\tsplitresult\vbox
{\unvbox\tsplitresult
\tsplitinbetween
\unvcopy\tsplittail}%
\dowithsplitofffloat{\tsplitbeforeresult\box\tsplitresult\tsplitafterresult}%
\doifnotinsidesplitfloat\tsplitafter
\endgraf
\fi
\ifinsidecolumns
\doifnotinsidesplitfloat\goodbreak
\else
\doifnotinsidesplitfloat\page
\fi
\fi}%
\global\setfalse\splitfloatfirstdone} % we can use this one for tests
\protect \endinput
% test cases
% \setupTABLE[split=repeat]
%
% \input tufte \endgraf
% \splitfloat[lines=11]
% {\placetable{\dorecurse{10}{test\recurselevel\endgraf}}}
% {\bTABLE\dorecurse{100}{\bTR \bTD test \eTD \eTR}\eTABLE}
% \input tufte \page
%
% \input tufte \endgraf
% \splitfloat[lines=0]
% {}
% {\bTABLE\dorecurse{100}{\bTR \bTD test \eTD \eTR}\eTABLE}
% \input tufte \endgraf \page
%
% \input tufte \endgraf
% \bTABLE\dorecurse{100}{\bTR \bTD test \eTD \eTR}\eTABLE
% \input tufte \page
% \setuptabulate[split=yes]
%
% \input tufte \endgraf
% \splitfloat[lines=11]
% {\placetable{\dorecurse{10}{test\recurselevel\endgraf}}}
% {\starttabulate\dorecurse{200}{\NC test \NC test \NC \NR}\stoptabulate}
% \input tufte \page
%
% \input tufte \endgraf
% \splitfloat[lines=0]
% {}
% {\starttabulate\dorecurse{200}{\NC test \NC test \NC \NR}\stoptabulate}
% \input tufte \page
%
% \input tufte \endgraf
% \starttabulate\dorecurse{200}{\NC test \NC test \NC \NR}\stoptabulate
% \input tufte \page
% \setuptables[split=yes]
%
% \newtoks\TestToks
%
% \TestToks\emptytoks
% \appendtoks\starttablehead\to\TestToks
% \dorecurse{3}{\appendtoks\VL head \VL head \VL \SR\to\TestToks}
% \appendtoks\stoptablehead\to\TestToks
% \appendtoks\starttabletail\to\TestToks
% \dorecurse{3}{\appendtoks\VL tail \VL tail \VL \SR\to\TestToks}
% \appendtoks\stoptabletail\to\TestToks
% \appendtoks\starttables[|c|c|]\to\TestToks
% \dorecurse{100}{\appendtoks\VL test \VL test \VL \SR\to\TestToks}
% \appendtoks\stoptables\to\TestToks
%
% \input tufte \endgraf
% \splitfloat[lines=auto] % [lines=11]
% {\placetable{\dorecurse{10}{test\recurselevel\endgraf}}}
% {\the\TestToks}
% \input tufte \page
%
% \input tufte \endgraf
% \splitfloat[lines=0]
% {}
% {\the\TestToks}
% \input tufte \page
%
% \input tufte \endgraf
% \the\TestToks
% \input tufte \page
%
% multiple floats
%
% \starttext
% \dorecurse{3}{\input tufte } \endgraf
% \dorecurse{5}{\placefigure{}{\framed[height=.5\textheight]{}}}
% \splitfloat[lines=auto,inbetween=]
% {\placetable{\dorecurse{5}{test\recurselevel\endgraf}}}
% {\bTABLE[split=yes]
% \bTR \bTD 11 \eTD \bTD \input tufte \eTD \eTR
% \bTR \bTD 12 \eTD \bTD \input zapf \eTD \eTR
% \bTR \bTD 13 \eTD \bTD \input bryson \eTD \eTR
% \bTR \bTD 14 \eTD \bTD test \eTD \eTR
% \bTR \bTD 21 \eTD \bTD \input tufte \eTD \eTR
% \bTR \bTD 22 \eTD \bTD \input zapf \eTD \eTR
% \bTR \bTD 23 \eTD \bTD \input bryson \eTD \eTR
% \bTR \bTD 24 \eTD \bTD test \eTD \eTR
% \bTR \bTD 31 \eTD \bTD \input tufte \eTD \eTR
% \bTR \bTD 32 \eTD \bTD \input zapf \eTD \eTR
% \bTR \bTD 33 \eTD \bTD \input bryson \eTD \eTR
% \bTR \bTD 34 \eTD \bTD test \eTD \eTR
% \eTABLE}
% \dorecurse{10}{\input tufte }
% \stoptext
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