summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/context/base/page-set.mkii
diff options
context:
space:
mode:
Diffstat (limited to 'Master/texmf-dist/tex/context/base/page-set.mkii')
-rw-r--r--Master/texmf-dist/tex/context/base/page-set.mkii3109
1 files changed, 3109 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/context/base/page-set.mkii b/Master/texmf-dist/tex/context/base/page-set.mkii
new file mode 100644
index 00000000000..b8a0751795c
--- /dev/null
+++ b/Master/texmf-dist/tex/context/base/page-set.mkii
@@ -0,0 +1,3109 @@
+%D \module
+%D [ file=page-set,
+%D version=2000.10.20,
+%D title=\CONTEXT\ Page Macros,
+%D subtitle=Column Sets,
+%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.
+
+% getnoflines vs getrawnoflines
+
+% some day: cleanup and go etex
+
+\writestatus{loading}{ConTeXt Page Macros / Column Sets}
+
+% todo : last longer than previous
+% todo : block span over last column if footnotes
+% todo : diagnosis balancing run
+% todo : separate footnote placement
+% todo : go on on same page with colset
+% todo : test page areas per page
+% todo : leftmargin/rightmargin (better than afstand(1))
+
+% use the OTRSET layer for more purposes, like the footnotes !
+
+\unprotect
+
+\newcount\tofcolumns % total
+\newcount\lofcolumns % left
+\newcount\rofcolumns % right
+
+\newcount\columnfirstcell \columnfirstcell=1
+\newcount\columnlastcell
+\newcount\columnfreecells
+\newcount\currenthcell
+\newcount\currentvcell
+\newcount\columnhcells
+\newcount\columnvcells
+
+\newif\ifenoughcolumncells
+\newif\ifsomefreecolumncells
+\newif\ifcolumnspread
+\newif\iftracecolumnset % \tracecolumnsettrue
+
+\def\columnmaxcells {75} % runtime
+\def\columnmaxfreecells {0} % runtime
+\def\columngaplimit {0} % {5}
+
+\def\@otr@{otr}
+
+\def\OTRSETmakeupwidth{\innermakeupwidth}
+
+\let\OTRSETflushsidefloats \forgetsidefloats % \relax
+\let\OTRSETsynchronizesidefloats\forgetsidefloats % \relax
+
+\def\OTRSETgridcell #1#2{\csname \@otr@:\number#1:\number#2\endcsname}
+\def\OTRSETgetgridcell#1#2{\box\csname \@otr@:\number#1:\number#2\endcsname}
+\def\OTRSETsetgridcell#1#2{\global\setbox\csname\@otr@:\number#1:\number#2\endcsname}
+
+\long\def\OTRSETdoifcellelse#1#2%
+ {\relax\ifvoid\csname\@otr@:\number#1:\number#2\endcsname
+ \@EA\secondoftwoarguments\else\@EA\firstoftwoarguments
+ \fi}
+
+% The following two macros are used to compensate for a switch in body fonts
+% as in:
+%
+% \definecolumnset [two] [n=2,balancing=yes]
+% \definecolumnset [three] [n=3,balancing=yes]
+%
+% \setupcolumnsetlines[two][1][1][7]
+% \setupcolumnsetlines[two][1][2][10]
+%
+% \setupcolumnsetlines[three][1][1][40]
+% \setupcolumnsetlines[three][1][2][40]
+% \setupcolumnsetlines[three][1][3][40]
+%
+% \setupcolumnsetstart[three][1][1][15]
+% \setupcolumnsetstart[three][1][2][20]
+% \setupcolumnsetstart[three][1][3][20]
+%
+% \starttext
+% \startcolumnset [two] \dorecurse {1}{\input tufte \par} \stopcolumnset
+% \switchtobodyfont[small]
+% \startcolumnset [three] \dorecurse {1}{\input tufte \par} \stopcolumnset
+% \stoptext
+
+%D Marks in columnsets:
+%D
+%D \starttyping
+%D \definemarking[M]
+%D \setupheadertexts[\setups{show-M-marks}]
+%D \definecolumnset[test][n=3]
+%D
+%D \startsetups show-M-marks
+%D \getmarking[M][1][previous]/\getmarking[M][1][first]/\getmarking[M][1][last]\quad
+%D \getmarking[M][2][previous]/\getmarking[M][2][first]/\getmarking[M][2][last]\quad
+%D \getmarking[M][3][previous]/\getmarking[M][3][first]/\getmarking[M][3][last]\quad
+%D \getmarking[M][1][previous]/\getmarking[M][1][first]/\getmarking[M][last]\quad
+%D \getsavedmarking[M][previous]/\getsavedmarking[M][first]/\getsavedmarking[M][last]
+%D \stopsetups
+%D
+%D \startbuffer
+%D \section{Knuth} [K1]\marking[M]{k1} [K2]\marking[M]{k2} \input knuth
+%D \section{Zapf} [Z]\marking[M]{z} \input zapf
+%D \stopbuffer
+%D
+%D \startbuffer
+%D \section{Ward} [W]\marking[M]{w} \input ward
+%D \placefigure[here]{none}{\externalfigure[a][height=2cm]}
+%D \section{Davis} [D]\marking[M]{d} \input davis
+%D \section{Zapf} [Z]\marking[M]{z} \input zapf
+%D \stopbuffer
+%D
+%D \startbuffer
+%D \section{Ward} [W]\marking[M]{w} \input ward
+%D \placefigure[here]{none}{\externalfigure[a][height=2cm]}
+%D \section{Davis} [D]\marking[M]{d} \input davis
+%D \section{Zapf} [Z]\marking[M]{z} \input zapf
+%D \section{Douglas} [O]\marking[M]{o} \input douglas
+%D \stopbuffer
+%D
+%D \starttext
+%D \startcolumnset[test]
+%D \dorecurse{5}{\getbuffer}
+%D \placefigure[here]{none}{\externalfigure[a][height=2cm]}
+%D % \column % sometimes needed
+%D \stopcolumnset
+%D \stoptext
+%D \stoptyping
+
+% not ok yet, for column sets we need a special case: within a column we
+% need to bubble-up the marks; the indirectness permits overloading here
+
+\let\saveOTRSETmark \refreshsavedmark
+\let\bubbleOTRSETmark\bubblesavedmark
+\let\resetOTRSETmark \resetsavedmark
+\let\presetOTRSETmark\presetsavedmark
+
+\def\doregisterOTRSETmarks#1{\saveOTRSETmark [#1][\number\mofcolumns]}
+\def\dobubbleOTRSETmarks #1{\bubbleOTRSETmark[#1][\number\mofcolumns]}
+\def\doresetOTRSETmarks #1{\resetOTRSETmark [#1][\recurselevel]}
+\def\dopresetOTRSETmarks #1{\presetOTRSETmark[#1][\recurselevel]}
+
+\def\registerOTRSETmarks
+ {\processcommacommand[\alldefinedmarks]\doregisterOTRSETmarks}
+\def\bubbleOTRSETmarks
+ {\processcommacommand[\alldefinedmarks]\dobubbleOTRSETmarks}
+\def\resetOTRSETmarks
+ {\dorecurse\nofcolumns{\processcommacommand[\alldefinedmarks]\doresetOTRSETmarks}}
+\def\presetOTRSETmarks
+ {\dorecurse\nofcolumns{\processcommacommand[\alldefinedmarks]\dopresetOTRSETmarks}}
+
+%D test case of Vit Zika (context list):
+%D
+%D \starttyping
+%D \setuplayout[height=middle,width=middle,grid=yes]
+%D
+%D \starttext
+%D \startcolumnset
+%D \dorecurse{10}
+%D {\input thuan \endgraf
+%D \bgroup
+%D \ss\restoreinterlinespace
+%D \dorecurse{3}{\input hawking \endgraf}
+%D \egroup
+%D \input bryson \endgraf}
+%D \stopcolumnset
+%D \stoptext
+%D \stoptyping
+
+\def\OTRSETsetcorrectnofcells#1%
+ {\bgroup
+ \!!counta#1\relax
+ \ifdim\globalbodyfontsize=\localbodyfontsize
+ \restoreinterlinespace
+ \else
+ \!!dimena-\!!counta\lineheight
+ \restoreglobalbodyfont % slow, we need a fast one
+ \advance\!!dimena\!!counta\lineheight
+ \getnoflines\!!dimena
+ \advance\!!counta\noflines
+ \ifnum\!!counta<#1\else
+ \!!counta#1\relax
+ \fi
+ \fi
+ \relax % needed ! ! ! ! else lookahead over \fi and \@EA
+ \@EA\egroup\@EA\scratchcounter\the\!!counta\relax}
+
+\def\OTRSETsetcorrectcellht
+ {\bgroup
+ \!!dimena-\strutht\relax
+ \ifdim\globalbodyfontsize=\localbodyfontsize
+ \restoreinterlinespace
+ \else
+ \restoreglobalbodyfont
+ \fi
+ \advance\!!dimena\strutht
+ \relax % needed ! ! ! ! else lookahead over \fi and \@EA
+ \@EA\egroup\@EA\scratchdimen\the\!!dimena\relax}
+
+\def\columnerasegridboxes % maybe dedicated loops
+ {\bgroup
+ \increment\columnmaxcells\relax
+ \ifodd\realpageno
+ \else % we are on the other page
+ \columnspreadfalse
+ \fi
+ \ifcolumnspread
+ \dorecurse\nofcolumns
+ {\let\!!stringa\recurselevel
+ \scratchcounter\recurselevel \advance\scratchcounter\lofcolumns
+ \edef\!!stringb{\the\scratchcounter}%
+ \dostepwiserecurse \zerocount \columnmaxcells \plusone
+ {\ifcsname\@otr@:\!!stringa:\recurselevel\endcsname
+ \global\setbox\csname\@otr@:\!!stringa:\recurselevel\endcsname
+ \ifcsname\@otr@:\!!stringb:\recurselevel\endcsname
+ \box\csname\@otr@:\!!stringb:\recurselevel\endcsname
+ %\global\setbox\csname\@otr@:\!!stringa:\recurselevel\endcsname\box\csname\@otr@:\!!stringb:\recurselevel\endcsname
+ \else
+ \emptybox
+ %\global\setbox\csname\@otr@:\!!stringa:\recurselevel\endcsname\emptybox
+ \expandafter\newbox\csname\@otr@:\!!stringb:\recurselevel\endcsname
+ \fi
+ \else
+ \expandafter\newbox\csname\@otr@:\!!stringa:\recurselevel\endcsname
+ \ifcsname\@otr@:\!!stringb:\recurselevel\endcsname
+ \global\setbox\csname\@otr@:\!!stringa:\recurselevel\endcsname\box\csname\@otr@:\!!stringb:\recurselevel\endcsname
+ \else
+ \expandafter\newbox\csname\@otr@:\!!stringb:\recurselevel\endcsname
+ \fi
+ \fi}}%
+ \else
+ \dorecurse \tofcolumns
+ {\let\!!stringa\recurselevel
+ \dostepwiserecurse \zerocount \columnmaxcells \plusone
+ {\ifcsname\@otr@:\!!stringa:\recurselevel\endcsname
+ \global\setbox\csname\@otr@:\!!stringa:\recurselevel\endcsname\emptybox
+ \else
+ \expandafter\newbox\csname\@otr@:\!!stringa:\recurselevel\endcsname
+ \fi}}%
+ \fi
+ \dorecurse\tofcolumns
+ {\global\setbox\csname\@otr@:\recurselevel:\columnmaxcells\endcsname\copy\placeholderboxa}%
+ \global\columnfirstcell\zerocount
+ \global\columnlastcell\columnfirstcell
+ \global\columnfreecells\columnfirstcell
+ \egroup}
+
+\def\doOTRSETsetgridcells#1#2#3#4#5#6% placeholder col row wid hei {data}
+ {\!!countd#2\advance\!!countd#4\advance\!!countd\minusone
+ \!!counte#3\advance\!!counte#5\advance\!!counte\minusone
+ \dostepwiserecurse{#2}\!!countd\plusone
+ {\!!countf\recurselevel
+ \dostepwiserecurse{#3}\!!counte\plusone
+ {\OTRSETsetgridcell\!!countf\recurselevel#1}}%
+ \dostepwiserecurse{#3}\!!counte\plusone
+ {\global\wd\OTRSETgridcell{#2}\recurselevel\hsize}%
+ \OTRSETsetgridcell{#2}\!!counte#6}
+
+\def\OTRSETsetgridcells
+ {\doOTRSETsetgridcells{\copy\placeholderboxb}}
+
+\def\OTRSETerasegridcells#1#2#3#4%
+ {\doOTRSETsetgridcells{\emptybox}{#1}{#2}{#3}{#4}{\emptybox}}
+
+\def\setupcolumnsetlines{\doquintupleempty\dosetupcolumnsettrick[l]}
+\def\setupcolumnsetstart{\doquintupleempty\dosetupcolumnsettrick[s]}
+
+\def\dosetupcolumnsettrick[#1][#2][#3][#4][#5]% tag id page col value
+ {% not needed, is already relative
+ % \doifinstringelse{+}{#3}{\scratchcounter\realpageno}{\scratchcounter\zerocount}%
+ % \advance\scratchcounter#3\relax % \relax needed
+ % \setevalue{\??mc:#1:#2:\the\scratchcounter:\number#4}{\number#5}}
+ \iffifthargument
+ \setevalue{\??mc:#1:#2:\number#3:\number#4}{\number#5}%
+ \else
+ \setevalue{\??mc:#1:#2:\number#3:0}{\number#4}%
+ \fi}
+
+\def\currentcolumnmaxcellstag #1{\??mc:l:\OTRSETidentifier:\columnsetpage:\number#1}
+\def\currentcolumnstartcelltag#1{\??mc:s:\OTRSETidentifier:\columnsetpage:\number#1}
+
+\def\doresetcolumnsetlines#1%
+ {\ifcsname\currentcolumnmaxcellstag{#1}\endcsname
+ \letgvalue{\currentcolumnmaxcellstag{#1}}\zerocount
+ \fi
+ \ifcsname\currentcolumnmaxcellstag{#1}\endcsname
+ \letgvalue{\currentcolumnmaxcellstag{#1}}\zerocount
+ \fi}
+
+\def\currentcolumnsomecells#1#2%
+ {\ifcsname#1\mofcolumns\endcsname
+ \ifnum\csname#1\mofcolumns\endcsname=\zerocount
+ #2%
+ \else
+ \number\numexpr\ifnum\csname#1\mofcolumns\endcsname<\zerocount
+ \columnmaxcells+\fi\csname#1\mofcolumns\endcsname\relax
+ \fi
+ \else\ifcsname#10\endcsname
+ \ifnum\csname#10\endcsname=\zerocount
+ #2%
+ \else
+ \number\numexpr\ifnum\csname#10\endcsname<\zerocount
+ \columnmaxcells+\fi\csname#10\endcsname\relax
+ \fi
+ \else
+ #2%
+ \fi\fi}
+
+\def\currentcolumnmaxcells {\currentcolumnsomecells\currentcolumnmaxcellstag \columnmaxcells}
+\def\currentcolumnstartcell{\currentcolumnsomecells\currentcolumnstartcelltag\plusone}
+
+\def\OTRSETsetfreecells#1#2% col start
+ {\bgroup
+ \global\columnfirstcell\ifnum#2=0 1\else#2\fi\relax
+ \OTRSETsetcorrectnofcells\currentcolumnmaxcells % sets \scratchcounter
+ \edef\columnmaxcells{\the\scratchcounter}%
+ \ifnum\columnfirstcell>\columnmaxcells
+ \global\columnfreecells\zerocount
+ \global\columnfirstcell\plusone
+ \global\columnlastcell \zerocount
+ \global\somefreecolumncellsfalse
+ %\message{no cells a}%
+ \else
+ \doloop
+ {\ifnum\columnfirstcell>\columnmaxcells\relax
+ \exitloop
+ \else
+ \OTRSETdoifcellelse{#1}\columnfirstcell
+ {\global\advance\columnfirstcell\plusone}\exitloop
+ \fi}%
+ \global\columnlastcell\columnfirstcell
+ \doloop
+ {\ifnum\columnlastcell>\columnmaxcells\relax
+ \exitloop
+ \else
+ \OTRSETdoifcellelse{#1}\columnlastcell
+ {\global\advance\columnlastcell \minusone \exitloop}
+ {\global\advance\columnlastcell \plusone }%
+ \fi}%
+ \ifnum\columnfirstcell>\columnmaxcells
+ \global\columnfreecells\zerocount
+ \global\columnfirstcell\plusone
+ \global\columnlastcell \zerocount
+ \global\somefreecolumncellsfalse
+ %\message{no cells b}%
+ \else
+ \ifnum\columnlastcell>\columnmaxcells
+ \global\columnlastcell\columnmaxcells
+ \fi
+ \global\columnfreecells\columnlastcell
+ \global\advance\columnfreecells -\columnfirstcell
+ \global\advance\columnfreecells \plusone
+ \global\somefreecolumncellstrue
+ %\message{\number\columnfirstcell-\number\columnlastcell=\number\columnfreecells}%
+ \fi
+ \fi
+ \egroup}
+
+\def\OTRSETgetmaxfreecells#1#2% col start
+ {\let\columnmaxfreecells\!!zerocount
+ \let\columnfrmfreecells\!!zerocount
+ \pushmacro \columnmaxcells
+\OTRSETsetcorrectnofcells\currentcolumnmaxcells % sets \scratchcounter
+\edef\columnmaxcells{\the\scratchcounter}%
+ \scratchcounter\zerocount
+ \dostepwiserecurse{#2}\columnmaxcells\plusone
+ {\OTRSETdoifcellelse{#1}\recurselevel
+ {\ifnum\columnmaxfreecells<\scratchcounter
+ \edef\columnmaxfreecells{\the\scratchcounter}%
+ \let\columnfrmfreecells\recurselevel
+ \fi
+ \scratchcounter\zerocount}
+ {\advance\scratchcounter\plusone}}%
+ \popmacro\columnmaxcells}
+
+\long\def\OTRSETrecurseRL#1%
+ {\dostepwiserecurse\nofcolumns\plusone\minusone
+ {#1\hskip\OTRSETgetparameter\c!distance\recurselevel}}
+
+\def\OTRSETmakegridbox
+ {\ifcase\columndirection
+ \OTRSETdomakegridbox\plusone\nofcolumns\plusone
+ \else
+ \OTRSETdomakegridbox\nofcolumns\plusone\minusone
+ \fi}
+
+\def\OTRSETmakeupwidth{\makeupwidth} % temporary indirectness
+
+\def\OTRSETdomakegridbox#1#2#3%
+ {\hbox\bgroup
+ \dontcomplain
+ \forgetall % can go once in \flush
+ \!!heighta \textheight
+ % test first !
+ \hbox to \OTRSETmakeupwidth
+ {\dostepwiserecurse{#1}{#2}{#3}
+ {\mofcolumns\recurselevel
+ \localcolumnwidth\OTRSETlocalwidth\mofcolumns
+ \setbox\scratchbox\hbox\localframed
+ [\??mc\OTRSETidentifier\number\mofcolumns]%
+ [\c!width=\localcolumnwidth,\c!height=\!!heighta,\c!lines=]%
+ {}%
+ \wd\scratchbox\localcolumnwidth
+ \ht\scratchbox\!!heighta
+ \ifcase\columndirection
+ \hskip\OTRSETgetparameter\c!distance\recurselevel
+ \box\scratchbox
+ \else
+ \box\scratchbox
+ \hskip\OTRSETgetparameter\c!distance\recurselevel
+ \fi}}%
+ \hskip-\OTRSETmakeupwidth
+ % main text
+ \hbox to \OTRSETmakeupwidth
+ {\dostepwiserecurse{#1}{#2}{#3}
+ {\mofcolumns\recurselevel
+ \localcolumnwidth\OTRSETlocalwidth\mofcolumns
+ \offinterlineskip
+ \setbox\scratchbox\vbox to \!!heighta
+ {\topskipcorrection % not needed
+ \ifcase\OTRSETbalancemethod
+ % no
+ \or
+ % yes
+ \doifelselayerdata{OTRTEXT}\vfill\relax % temp hack
+ \or
+ % top
+ \or
+ % bottom
+ \vfill
+ \fi
+ \dorecurse\columnmaxcells
+ {\setbox\scratchbox\hbox{\OTRSETgetgridcell\mofcolumns\recurselevel}%
+% {\setbox\scratchbox\hbox
+% {\localstarttextcolor
+% \OTRSETgetgridcell\mofcolumns\recurselevel
+% \localstoptextcolor}%
+ \ht\scratchbox\strutht
+ \dp\scratchbox\strutdp
+ \ifcase\columndirection
+ \box\scratchbox
+ \else
+ \hbox to \localcolumnwidth
+ {\hskip\localcolumnwidth\llap{\box\scratchbox}}%
+ \fi
+ \par}%
+ \ifcase\OTRSETbalancemethod
+ % no
+ \else
+ % yes, top, bottom
+ \ifdim\globalbodyfontsize=\localbodyfontsize
+ \removedepth
+ \restoreglobalbodyfont
+ \vskip\strutdepth
+ \fi
+ \kern\zeropoint
+ \vss
+ \fi}%
+ \wd\scratchbox\localcolumnwidth % \textwidth
+ \ifcase\columndirection
+ \hskip\OTRSETgetparameter\c!distance\recurselevel\box\scratchbox
+ \else
+ \box\scratchbox\hskip\OTRSETgetparameter\c!distance\recurselevel
+ \fi}}%
+ \egroup}
+
+\let\OTRSETbalht\zeropoint
+
+\def\OTRSETreducegridbox % for the moment no difference between methods
+ {\globallet\OTRSETbalht\zeropoint
+ \ifcase\OTRSETbalancemethod
+ % no balancing
+ \else
+ \bgroup
+ \!!counta\columnmaxcells
+ \donetrue
+ \doloop
+ {\dorecurse\nofcolumns{\OTRSETdoifcellelse\recurselevel\!!counta\donefalse\donothing}%
+ \ifdone
+ \ifnum\!!counta>\plusone\advance\!!counta\minusone\else\exitloop\fi
+ \else
+ \exitloop
+ \fi}%
+ \ifnum\!!counta>\plusone
+ \!!heighta\lineheight
+ \multiply\!!heighta \!!counta
+ \advance\!!heighta \topskip
+ \advance\!!heighta -\lineheight
+ \else
+ \!!heighta\zeropoint
+ \fi
+ \xdef\OTRSETbalht{\the\!!heighta}%
+ \egroup
+ \fi}
+
+\def\OTRSETflushfinalfootnotes
+ {\ifcase\lastcolumnlastcell \else
+ \setbox\scratchbox\hbox
+ {\placebottomnotes}%
+ \ifdim\ht\scratchbox>\zeropoint
+ \setbox\scratchbox\hbox
+ {\hbox to \zeropoint{\OTRSETgetgridcell\nofcolumns\lastcolumnlastcell}%
+ \box\scratchbox}%
+ \ht\scratchbox\strutht
+ \dp\scratchbox\strutdp
+ \OTRSETsetgridcell\nofcolumns\lastcolumnlastcell\box\scratchbox
+ \fi
+ \global\lastcolumnlastcell\zerocount
+ \fi}
+
+\def\OTRSETdoflush
+ {\ifcollectingcontent
+ \registerOTRSETmarks
+ \global\mofcolumns\plusone
+ \else
+ \OTRSETdofinalflush
+ \OTRSETdofinaloutput
+ \ifnum\columnsetpage>0
+ \dorecurse\nofcolumns{\doresetcolumnsetlines\recurselevel}%
+ \fi
+ \doglobal\increment\columnsetpage
+ \OTRSETinitializecolumns
+ %\OTRSETdoflushfloats
+ \OTRSETstartnextpage
+\presetOTRSETmarks
+ \initializecolumntextareas
+ \fi}
+
+\newbox\OTRfinalpagebox
+
+\def\OTRSETdofinalflush % see \OTRSETdoflush
+ {\OTRSETflushfinalfootnotes
+ \placecolumntextareas
+ \OTRSETcentergridcells
+ \bgroup % we want to keep the reduction local
+ \OTRSETreducegridbox
+ \global\setbox\OTRfinalpagebox\OTRSETmakegridbox
+ \egroup % otherwise we get the wrong number of free cells
+ %\gdef\localcolumnmaxcells{0}% here ?
+ \global\mofcolumns\nofcolumns} % otherwise problems in finaloutput
+
+% \def\OTRSETdofinaloutput
+% {\ifdim\ht\OTRfinalpagebox=\teksthoogte
+% % \bgroup \let\OTRSETsetvsize\relax % prevents useless search for gap
+% \ifcase\OTRSETbalancemethod
+% \finaloutput\box\OTRfinalpagebox
+% \else\ifdim\OTRSETbalht>\zeropoint
+% \global\setbox\OTRfinalpagebox \iftracecolumnset\ruledvbox\else\vbox\fi to \OTRSETbalht
+% {\box\OTRfinalpagebox}%
+% \global\dp\OTRfinalpagebox\strutdepth
+% \box\OTRfinalpagebox
+% \else
+% \finaloutput\box\OTRfinalpagebox
+% \fi \fi
+% \globallet\OTRSETbalht\zeropoint
+% % \egroup
+% \fi}
+
+\def\OTRSETdofinaloutput
+ {\ifdim\ht\OTRfinalpagebox=\textheight
+ \bgroup % \let\OTRSETsetvsize\relax % prevents useless search for gap
+ \ifcase\OTRSETbalancemethod
+ \finaloutput\box\OTRfinalpagebox
+ \else\ifdim\OTRSETbalht>\zeropoint
+ % catch a bordercase
+ \scratchdimen\OTRSETbalht
+ \advance\scratchdimen\lineheight\relax
+ \ifdim\scratchdimen>\textheight
+ % full page
+ \finaloutput\box\OTRfinalpagebox
+ \else
+ % same page
+ \global\setbox\OTRfinalpagebox \iftracecolumnset\ruledvbox\else\vbox\fi to \OTRSETbalht
+ {\box\OTRfinalpagebox\vss}%
+ \setlayer[OTRTEXT]{\box\OTRfinalpagebox}%
+ \snaptogrid\vbox{\vskip\OTRSETbalht}% hack
+ \fi
+ \else
+ \finaloutput\box\OTRfinalpagebox
+ \fi \fi
+ \globallet\OTRSETbalht\zeropoint
+ \egroup
+ \fi}
+
+\definesystemvariable {mc}
+\definesystemvariable {mt}
+\definesystemconstant {colset}
+
+\definetwopasslist\s!colset
+
+\newdimen \OTRSETtextswidth
+\newdimen \OTRSETtextsheight
+\let \OTRSETidentifier=\empty
+
+\newtoks \OTRSEToutput
+
+\def\OTRSETgetparameter#1#2{\csname\??mc\OTRSETidentifier\number#2#1\endcsname}
+\def\OTRSETsetparameter#1#2{\setvalue{\??mc\OTRSETidentifier\number#2#1}}
+
+\def\OTRSETskipstart
+ {\scratchcounter\executeifdefined{\??mc\OTRSETidentifier\c!start}\zerocount
+ \relax % needed !
+ \ifcase\scratchcounter\else
+ \advance\scratchcounter\plusone
+ \doOTRSETsetgridcells
+ {\copy\placeholderboxe}
+ \plusone\plusone\nofcolumns\scratchcounter
+ \null
+ \fi}
+
+\def\OTRSETsetvsize % snap per sectie (gap here?)
+ {\ifcollectingcontent \else % can be assigndimen
+\OTRSETskipstart % not that well tested
+ \OTRSETcheckinsert % added
+ \OTRSETsetfreecells\mofcolumns\columnfirstcell
+ \ifsomefreecolumncells
+ \global\vsize\columnfreecells\lineheight
+ \ifinotr % else problems with floats, see extreme
+ \global\pagegoal\vsize % niet nodig, tenzij binnen otr
+ \fi
+ \synchronizeoutput % fails on example
+ % \allowbreak % hm
+ \fi
+ \synchronizenotes
+ \fi}
+
+\def\OTRSETsethsize % of course this does not migrate outside the otr
+ {\localcolumnwidth\OTRSETlocalwidth\mofcolumns
+ \textwidth\localcolumnwidth
+ \hsize\localcolumnwidth}
+
+\def\OTRSETsynchronizehsize
+ {\ifcase0\getvalue{\??mc\??mc\c!width}\else % some width set
+ \bgroup
+ \scratchdimen\OTRSETlocalwidth\mofcolumns
+ \ifdim\scratchdimen=\textwidth
+ \egroup
+ \else
+ % only if change in width and \column/\break
+ \egroup \OTRSETsethsize
+ \fi
+ \fi}
+
+\def\OTRSETcheckfreelines
+ {\OTRSETsetvsize}
+
+\def\doOTRSETcolumnseparator
+ {\hbox to \zeropoint{\hss\red\vl\hss}}
+
+\let\OTRSETcolumnseparator\relax
+
+\def\showbreaks
+ {\let\OTRSETcolumnseparator\doOTRSETcolumnseparator}
+
+% \installcolumnbreakhandler {SET} \v!ja
+% {% hmmm:
+% \ifhmode
+% \bgroup
+% \removeunwantedspaces
+% \parfillskip\zeropoint
+% \OTRSETcolumnseparator
+% \par
+% \egroup
+% \fi
+% % brrr:
+% \ejectinsert
+% \ejectpage
+% \OTRSETsynchronizehsize} % no \OTRSETsethsize, can be mid smaller (like tabulate)
+%
+% \installcolumnbreakhandler {SET} \v!forceer
+% {\OTRSETgotocolumn[\v!forceer]}
+% \installcolumnbreakhandler {SET} \v!eerste
+% {\OTRSETgotocolumn[\v!eerste]}
+% \installcolumnbreakhandler {SET} \v!laatste
+% {\OTRSETgotocolumn[\v!laatste]}
+%
+% \installcolumnbreakhandler {SET} \v!pagina
+% {\simplepagebreak % \flushnotes \executepagebreakhandler\v!ja
+% \ifnum\mofcolumns>\plusone
+% \OTRSETgotocolumn[\v!laatste,\v!forceer]%
+% \fi}
+
+\def\OTRSETcolumnhbreak
+ {\ifhmode
+ \bgroup
+ \removeunwantedspaces
+ \parfillskip\zeropoint
+ \OTRSETcolumnseparator
+ \par
+ \egroup
+ \fi}
+
+\installcolumnbreakhandler {SET} \v!local
+ {\OTRSETcolumnhbreak
+ \ejectinsert
+ \ejectpage % brrr
+ % no \OTRSETsethsize, can be mid smaller (like tabulate)
+ % also, this one should be executed at the outer level
+ % (setting hsize inside otr does not work)
+ \OTRSETsynchronizehsize}
+
+% We need to make sure that we really leave the column; mid
+% column we may end up in an empty gap, and we don't want to
+% stay there (basically such a gap is a small empty page
+% then).
+
+\installcolumnbreakhandler {SET} \v!yes
+ {\OTRSETcolumnhbreak
+ \edef\savedmofcolumns{\the\mofcolumns}%
+ \edef\savedrealpageno{\the\realpageno}%
+ \ejectinsert
+ \ejectpage % brrr
+ \doloop
+ {\ifnum\savedmofcolumns=\mofcolumns
+ \ifnum\savedrealpageno=\realpageno
+ \OTRSETdummycolumn
+ \else
+ \exitloop
+ \fi
+ \else
+ \exitloop
+ \fi}%
+ \OTRSETsynchronizehsize}
+
+\installcolumnbreakhandler {SET} \s!unknown
+ {\expanded{\OTRSETgotocolumn[\@@columnspecification]}}
+
+\installcolumnbreakhandler {SET} \v!page
+ {\vfill\eject % \doejectpage\eject
+ \OTRSETgotonextpage}
+
+\newtoks\OTRSETeverystartofcolumn
+
+\newbox\OTRSETsavedfootnotes
+
+% \installoutput\OTRSETflushtextsofar % spacing goes wrong
+
+%\def\OTRSETflushtextsofar
+% {\ifvoid\normalpagebox \else
+% \setbox\scratchbox\vbox{\unvbox\normalpagebox}%
+% \OTRSETsavenotes
+% \OTRSEThandleflushedtext0
+% \fi}
+
+% The complication is in the fact that when the HERE float
+% is placed, the otr is not invoked when there is not yet
+% enough content; this can lead to a change in order (turning
+% on the tracer with option 0 is very instructive, watch the
+% small numbers in the margin)
+%
+% 0 = no flushing, so no interference but user should handle
+% border cases of placement
+% 1 = the normal otr, rather untested
+% 2 = a solution that works ok, is experimental and above
+% all messy
+
+\chardef\OTRSETflushtextmode=0
+
+\def\OTRSETflushtextsofar
+ {\ifcase\OTRSETflushtextmode
+ % don't mess around
+ \or
+ % the normal one
+ \ifvoid\normalpagebox\else
+ \OTRSETnaturalflush
+ \OTRSETcheckfreelines
+ \fi
+ \or
+ % way to complicated, but kind of ok
+ \doOTRSETflushtextsofar
+ \fi}
+
+\newskip\lastskipinotr
+
+\installoutput\doOTRSETflushtextsofar % experimental
+ {\ifvoid\normalpagebox\else
+ \scratchdimen\dp\normalpagebox
+ \setbox\scratchbox\vbox
+ {\forgetall
+ \unvbox\normalpagebox
+ \global\lastskipinotr\lastskip\relax
+ \ifdim\lastskipinotr>\zeropoint\relax
+ \removelastskip
+ \else
+ \kern-\scratchdimen % handle depth
+ \fi}%
+ \ifdim\lastskipinotr>\zeropoint
+ \scratchskip\ht\scratchbox
+ \setbox\scratchbox\hbox
+ {\lower\strutdepth\box\scratchbox}%
+ \dp\scratchbox\scratchdimen
+ \ht\scratchbox\scratchskip
+ \fi
+ \OTRSETsavenotes
+ \OTRSEThandleflushedtext\zerocount
+ \ifdim\lastskipinotr>\zeropoint
+ %\vskip \lastskipinotr % hm, gets lost anyway
+ \else
+ % we should not discard skips after here; tricky
+ \fi
+ \OTRSETsetvsize
+ \fi}
+
+\def\OTRSETplacebottomnotes
+ {\iflastcolumnfootnotes
+ \ifnum\nofcolumns=\mofcolumns
+ \ifintermediatefootnotes \placebottomnotes \fi
+ \fi
+ \else
+ \placebottomnotes
+ \fi}
+
+\def\OTRSETflushsavednotes
+ {\iflastcolumnfootnotes
+ \ifnum\nofcolumns=\mofcolumns
+ \flushsavednotes
+ \fi
+ \else
+ \flushsavednotes
+ \fi}
+
+\def\OTRSETsavenotes
+ {\iflastcolumnfootnotes
+ \ifnum\nofcolumns=\mofcolumns \else
+ \savenotes
+ \fi
+ \fi}
+
+\appendtoks \OTRSETflushsavednotes \to \OTRSETeverystartofcolumn
+
+\def\OTRSETnaturalflush
+ {\bgroup
+ \forgetall % new, needed !
+ \setbox0\vbox to \columnfreecells\lineheight
+ {\vskip-\topskip
+ \vskip\lineheight
+ \prevdepth\strutdp
+ \unvbox\normalpagebox
+ \vfill}%
+ \setbox2\hbox
+ {\OTRSETplacebottomnotes}%
+ \setbox\scratchbox\hbox
+ {\wd0\zeropoint\box0\box2}%
+ \dp\scratchbox\strutdp
+ \OTRSEThandleflushedtext\plusone
+ \egroup}
+
+\newcount\lastcolumnlastcell
+
+\def\OTRSEThandleflushedtext#1%
+ {\getnoflines{\ht\scratchbox}%
+ %\wd\scratchbox\textwidth % geen \hsize kan < zijn in bv split tabulate
+ \wd\scratchbox\OTRSETlocalwidth\mofcolumns
+ \doOTRSETsetgridcells
+ {\copy\placeholderboxf}
+ \mofcolumns\columnfirstcell\plusone\noflines
+ {\registeredtextarea1\columnfirstcell\scratchbox}% == \hbox / tricky htcorr == \columnfirstcell
+ \global\columnlastcell\columnfirstcell
+ \global\advance\columnlastcell \noflines
+ \global\lastcolumnlastcell\columnlastcell
+ \global\advance\lastcolumnlastcell \minusone
+ % find next (acceptable) gap, todo: deadcycle
+ \ifcase#1\else
+ \OTRSETfillgapsbetweencells\mofcolumns\columnlastcell
+ \fi
+ \OTRSETfindnextgap
+ % \message{\the\mofcolumns,\the\columnfirstcell,\the\columnfreecells}%
+ % \wait
+ % we cannot adapt the hsize since it may have changed (like
+ % inside a tabulate) so we only change it when there is a
+ % reason to do so
+ \OTRSETsynchronizehsize
+ \OTRSETsetvsize}
+
+\def\OTRSETfindnextgap
+ {\OTRSETsetfreecells\mofcolumns\columnlastcell
+ \ifsomefreecolumncells
+ % okay
+ \bubbleOTRSETmarks % not robust because we reenter
+ \else
+ \registerOTRSETmarks % not robust because we reenter
+ \global\advance\mofcolumns \plusone
+ \ifnum\mofcolumns>\nofcolumns
+ \OTRSETdoflush
+ \global\columnlastcell\plusone
+ \global\columnfirstcell\zerocount
+ \OTRSETdoflushfloats
+ \else
+ \the\OTRSETeverystartofcolumn
+ \global\columnlastcell\plusone
+ \global\columnfirstcell\zerocount
+ \fi
+ \fi}
+
+\let\OTRSETcheckfreelines\donothing
+
+\def\OTRSETfillgapsbetweencells#1#2% col
+ {\ifnum\columngaplimit>\zerocount
+ \donefalse
+ \dostepwiserecurse{#2}\columnmaxcells\plusone
+ {\OTRSETdoifcellelse{#1}\recurselevel
+ {\ifdone
+ \!!countb\recurselevel \advance\!!countb -\!!counta\relax
+ \ifnum\!!countb>\plusone
+ \advance\!!countb \minusone
+ \ifnum\!!countb<\columngaplimit\relax
+ \!!countb\recurselevel \advance\!!countb \minusone
+ \dostepwiserecurse\!!counta\!!countb\plusone
+ {\OTRSETsetgridcell{#1}\recurselevel\copy\placeholderboxc}%
+ %\message{[gap]}%
+ \fi
+ \fi
+ \fi
+ \donefalse}
+ {\ifdone \else
+ \donetrue
+ \!!counta\recurselevel
+ \fi}}%
+ \fi}
+
+\appendtoks
+ \OTRSETfillgapsbetweencells\mofcolumns\plusone
+\to \OTRSETeverystartofcolumn
+
+%\def\OTRSETfreezeminimumgap#1%
+% {\OTRSETgetmaxfreecells{#1}{1}%
+% \ifnum\columnmaxfreecells>0
+% \!!countb=\columnfrmfreecells
+% \!!counta=\!!counta \advance\!!counta -\columnmaxfreecells
+% \dorecurse{\columnmaxcells}
+% {\ifnum\recurselevel<\!!counta\relax
+% \donetrue
+% \else\ifnum\recurselevel>\!!countb
+% \donetrue
+% \else
+% \donefalse
+% \fi\fi
+% \ifdone
+% \OTRSETdoifcellelse{#1}{\recurselevel}
+% {}{\OTRSETsetgridcell{#1}\recurselevel\copy\placeholderboxc}%
+% \fi}%
+% \fi}
+%
+%\def\OTRSETfillgaps#1#2#3% col from to
+% {\dostepwiserecurse{#2}{#3}{1}
+% {\OTRSETdoifcellelse{#1}{\recurselevel}
+% {}{\OTRSETsetgridcell{#1}\recurselevel\copy\placeholderboxc}}}
+%
+%\def\OTRSETfillbotgaps#1#2% col first
+% {\OTRSETfillgaps{#1}{#2}{\columnmaxcells}}
+%
+%\def\OTRSETfilltopgaps#1#2% col last
+% {\OTRSETfillgaps{#1}{1}{#2}}
+
+\newif\ifspancolumnslots \spancolumnslotstrue
+\newif\ifcheckcolumnspan \checkcolumnspantrue
+
+\def\OTRSETcheckwidthgap#1#2% box size
+ {\ifcheckcolumnspan
+ \bgroup
+ \scratchdimen#2%
+ \advance\scratchdimen-\wd#1\relax
+ \ifdim-10\scaledpoint>\scratchdimen
+ \egroup
+ \else\ifdim10\scaledpoint<\scratchdimen
+ \egroup
+ \else
+ \egroup
+ \wd#1=#2%
+ \fi\fi
+ \fi}
+
+\def\OTRSETcheckcolumnslot#1%
+ {\enoughcolumncellstrue
+ \ifspancolumnslots\else
+ \OTRSETcheckwidthgap#1\hsize
+ \ifdim\wd#1>\hsize
+ \enoughcolumncellsfalse
+ \fi
+ \fi
+ \ifenoughcolumncells
+ \getnoflines\pagetotal
+ \scratchcounter\noflines
+ \getnoflines{\ht#1}%
+ \columnvcells\noflines
+ \columnhcells\plusone
+ \advance\scratchcounter \columnvcells \relax
+ \ifnum\scratchcounter>\columnfreecells
+ \enoughcolumncellsfalse
+ \fi
+ \fi}
+
+\def\OTRSETstoreincolumnslotPAGE#1%
+ {\ifenoughcolumncells
+ % to do
+ \OTRSETsavebox{#1}%
+ \else
+ \OTRSETsavebox{#1}%
+ \fi}
+
+\def\OTRSETstoreincolumnslotTOPS#1%
+ {\OTRSETprepareforcolumnslot1{#1}%
+ \OTRSETcheckcolumnslot{#1}%
+ \ifenoughcolumncells
+ \OTRSETcheckcolumnspace\mofcolumns\columnfirstcell{#1}%
+ \fi
+ \ifenoughcolumncells
+ \OTRSETsetgridcells\mofcolumns\columnfirstcell\columnhcells\columnvcells
+ {\hbox{\copy#1}}%
+ \OTRSETsetvsize
+ \else
+ \OTRSETsavebox{#1}%
+ \fi}
+
+\def\OTRSETstoreincolumnslotBOTS#1%
+ {\OTRSETprepareforcolumnslot3{#1}%
+ \edef\savedcolumnlastcell{\the\columnlastcell}%
+ \OTRSETcheckcolumnslot{#1}%
+ \ifenoughcolumncells
+ \advance\columnlastcell -\columnvcells \advance\columnlastcell \plusone
+% \OTRSETcheckcolumnspace\mofcolumns\columnfirstcell{#1}%
+ \OTRSETcheckcolumnspace\mofcolumns\columnlastcell{#1}%
+ \fi
+ \ifenoughcolumncells
+ \OTRSETsetgridcells\mofcolumns\columnlastcell\columnhcells\columnvcells{\copy#1}%
+ \OTRSETfillgapsbetweencells\mofcolumns\savedcolumnlastcell % -)
+ \OTRSETsetvsize
+ \else
+ \columnlastcell\savedcolumnlastcell
+ \OTRSETsavebox{#1}%
+ \fi}
+
+\newdimen\totalcolumnspace
+
+\def\columnspacetopoffset{0}
+\def\columnspacebotoffset{0}
+
+\def\OTRSETcheckcolumnspace#1#2#3% col row box
+ {\columnhcells\plusone
+ \totalcolumnspace\zeropoint
+ \scratchcounter#1%
+ \enoughcolumncellstrue
+ \doloop
+ {\advance\totalcolumnspace \OTRSETlocalwidth\scratchcounter\relax % needed
+\OTRSETcheckwidthgap#3\totalcolumnspace
+ \ifnum\wd#3>\totalcolumnspace\relax
+ \ifnum\scratchcounter=\nofcolumns
+ \enoughcolumncellsfalse
+ \exitloop
+ \else
+ \advance\columnhcells \plusone
+ \advance\scratchcounter \plusone
+ \advance\totalcolumnspace \OTRSETgetparameter\c!distance\scratchcounter
+ \fi
+ \else
+ \exitloop
+ \fi}%
+ \ifenoughcolumncells
+ \getnoflines{\ht#3}%
+ \columnvcells\noflines
+ \OTRSETcheckcolumncells{#1}{#2}\columnhcells\columnvcells
+ \fi}
+
+\def\OTRSETcheckcolumncells#1#2#3#4% col row wid hei
+ {\!!countd#1\advance\!!countd#3\advance\!!countd\minusone
+ \!!counte#2\advance\!!counte#4\advance\!!counte\minusone
+ \ifnum\!!counte>\columnmaxcells\relax
+ \enoughcolumncellsfalse
+ \else
+ \enoughcolumncellstrue
+%\let\columnspacetopoffset\zerocount
+%\scratchcounter#2\advance\scratchcounter\minusone
+%\ifnum\scratchcounter>0
+% \dostepwiserecurse{#1}\!!countd\plusone
+% {\ifdim\wd\OTRSETgridcell\recurselevel\scratchcounter>\zeropoint
+% \let\columnspacetopoffset\plusone
+% \else\ifdim\dp\OTRSETgridcell\recurselevel\scratchcounter>\zeropoint
+% \let\columnspacetopoffset\plusone
+% \fi\fi}%
+% \advance\!!counte \columnspacetopoffset \relax
+% \advance\columnvcells \columnspacetopoffset \relax
+%\fi
+%\let\columnspacebotoffset\zerocount
+%\scratchcounter\!!counte
+%\advance\scratchcounter \columnvcells \relax
+%\ifnum\scratchcounter>\columnmaxcells\else
+% \dostepwiserecurse{#1}\!!countd\plusone
+% {\ifdim\wd\OTRSETgridcell\recurselevel\scratchcounter>\zeropoint
+% \let\columnspacebotoffset\plusone
+% \else\ifdim\dp\OTRSETgridcell\recurselevel\scratchcounter>\zeropoint
+% \let\columnspacebotoffset\plusone
+% \fi\fi}%
+% \advance\!!counte \columnspacebotoffset \relax
+% \advance\columnvcells \columnspacebotoffset \relax
+%\fi
+ \dostepwiserecurse{#1}\!!countd\plusone % cols
+ {\ifenoughcolumncells
+ \!!countf\recurselevel\relax
+ \dostepwiserecurse{#2}\!!counte\plusone % rows
+ {\ifenoughcolumncells
+ \OTRSETdoifcellelse\!!countf\recurselevel
+ {\enoughcolumncellsfalse}{}%
+ \fi}%
+ \fi}%
+ \fi}
+
+\def\OTRSETsetpreferedcolumnslot#1#2%
+ {\doifsomething{#1}{\edef\preferedcolumn{#1}}%
+ \doifsomething{#2}{\edef\preferedrow {#2}}}
+
+\OTRSETsetpreferedcolumnslot{\nofcolumns}{1} % default ?
+
+\let\pofcolumns\mofcolumns
+\let\qofcolumns\mofcolumns
+
+\newif\ifquitincurrentcolumn
+
+\def\OTRSETstoreincolumnslotLRTB#1%
+ {\OTRSETprepareforcolumnslot1{#1}%
+ \OTRSETflushtextsofar
+ \OTRSETstoreincolumnslotindeed
+ \mofcolumns\nofcolumns+\currenthcell
+ \plusone\columnmaxcells+\currentvcell{#1}}
+
+\def\OTRSETstoreincolumnslotLRBT#1%
+ {\OTRSETprepareforcolumnslot3{#1}%
+ \OTRSETflushtextsofar
+ \OTRSETstoreincolumnslotindeed
+ \mofcolumns\nofcolumns+\currenthcell
+ \columnmaxcells\plusone-\currentvcell{#1}}
+
+\def\OTRSETstoreincolumnslotRLTB#1%
+ {\OTRSETprepareforcolumnslot1{#1}%
+ \OTRSETflushtextsofar
+ \OTRSETcheckprefered
+ \OTRSETstoreincolumnslotindeed
+ \nofcolumns\qofcolumns-\currenthcell
+ \plusone\columnmaxcells+\currentvcell{#1}}
+
+\def\OTRSETstoreincolumnslotRLBT#1%
+ {\OTRSETprepareforcolumnslot3{#1}%
+ \OTRSETflushtextsofar
+ \OTRSETcheckprefered
+ \OTRSETstoreincolumnslotindeed
+ \nofcolumns\qofcolumns-\currenthcell
+ \columnmaxcells\plusone-\currentvcell{#1}}
+
+\def\OTRSETstoreincolumnslotTBLR#1%
+ {\OTRSETprepareforcolumnslot1{#1}%
+ \OTRSETflushtextsofar
+ \OTRSETstoreincolumnslotindeed
+ \plusone\columnmaxcells+\currentvcell
+ \mofcolumns\nofcolumns+\currenthcell{#1}}
+
+\def\OTRSETstoreincolumnslotTBRL#1%
+ {\OTRSETprepareforcolumnslot1{#1}%
+ \OTRSETflushtextsofar
+ \OTRSETcheckprefered
+ \OTRSETstoreincolumnslotindeed
+ \plusone\columnmaxcells+\currentvcell
+ \nofcolumns\qofcolumns-\currenthcell{#1}}
+
+\def\OTRSETstoreincolumnslotBTLR#1%
+ {\OTRSETprepareforcolumnslot3{#1}%
+ \OTRSETflushtextsofar
+ \OTRSETstoreincolumnslotindeed
+ \columnmaxcells\plusone-\currentvcell
+ \mofcolumns\nofcolumns+\currenthcell{#1}}
+
+\def\OTRSETstoreincolumnslotBTRL#1%
+ {\OTRSETprepareforcolumnslot3{#1}%
+ \OTRSETflushtextsofar
+ \OTRSETcheckprefered
+ \OTRSETstoreincolumnslotindeed
+ \columnmaxcells\plusone-\currentvcell
+ \nofcolumns\qofcolumns-\currenthcell{#1}}
+
+\def\OTRSETstoreincolumnslotFXTB#1% fixed column
+ {\OTRSETcheckprefered
+ \OTRSETdoifcellelse\pofcolumns\plusone
+ {\OTRSETprepareforcolumnslot2}{\OTRSETprepareforcolumnslot1}{#1}% % 1/2 dependent of place, todo
+ \OTRSETflushtextsofar
+ \OTRSETstoreincolumnslotindeed
+ \pofcolumns \pofcolumns +\currenthcell
+ \preferedrow\columnmaxcells+\currentvcell{#1}}
+
+\def\OTRSETstoreincolumnslotFXBT#1% fixed column
+ {\OTRSETcheckprefered
+ \OTRSETdoifcellelse\pofcolumns\columnmaxcells
+ {\OTRSETprepareforcolumnslot2}{\OTRSETprepareforcolumnslot3}{#1}% % 3/2 dependent of place, todo
+ \OTRSETflushtextsofar
+ \OTRSETstoreincolumnslotindeed
+ \pofcolumns \pofcolumns +\currenthcell
+ \columnmaxcells\preferedrow-\currentvcell{#1}}
+
+% \def\OTRSETstoreincolumnslotHERE#1% fixed column
+% {\OTRSETprepareforcolumnslot2{#1}%
+% \OTRSETflushtextsofar
+% \getnoflines\pagetotal \advance\noflines\columnfirstcell
+% \OTRSETstoreincolumnslotindeed
+% \mofcolumns\mofcolumns+\currenthcell
+% \noflines\columnmaxcells+\currentvcell{#1}%
+% \OTRSETsetvsize}
+
+\chardef\OTRSETforcefixedfloats=0
+
+\def\OTRSETstoreincolumnslotHERE#1% fixed column
+ {\ifcase\OTRSETforcefixedfloats
+ \OTRSETstoreincolumnslotSOMEWHERE2{#1}%
+ \else
+ \OTRSETstoreincolumnslotFIXD{#1}%
+ \fi}
+
+% this one looses too wide graphics
+%
+% \def\OTRSETstoreincolumnslotFIXD#1% fixed column
+% {\OTRSETprepareforcolumnslot2{#1}%
+% % no flush text sofar here, beware: no width test
+% \snaptogrid\vbox{\box#1}}
+%
+% still imperfect
+
+\def\OTRSETstoreincolumnslotFIXD#1% fixed column
+ {\OTRSETflushtextsofar
+ \ifdim\wd#1>\textwidth
+ \OTRSETstoreincolumnslotSOMEWHERE2{#1}%
+ \else
+ % crappy test / needed for o-pbu-f / will be replaced
+ \getnoflines{\ht#1}%
+ \scratchdimen\noflines\lineheight
+ \advance\scratchdimen\lineheight
+ \advance\scratchdimen\pagetotal\relax
+ \ifdim\scratchdimen<\pagegoal
+ %OTRSETprepareforcolumnslot3{#1}%
+ %ruledvskip\columnslotspacing\lineheight
+ \blank[\columnslotspacing*\v!line]%
+ \snaptogrid\hbox to \hsize{\hss\box#1\hss}% strange, why the centering
+ \blank[\columnslotspacing*\v!line]%
+ \else
+ \OTRSETstoreincolumnslotSOMEWHERE2{#1}%
+ \fi
+ \fi}
+
+\def\OTRSETstoreincolumnslotSOMEWHERE#1#2%
+ {\OTRSETprepareforcolumnslot{#1}{#2}%
+ \OTRSETflushtextsofar
+ \getnoflines\pagetotal \advance\noflines\columnfirstcell
+ \OTRSETstoreincolumnslotindeed
+ \mofcolumns\mofcolumns+\currenthcell
+ \noflines\columnmaxcells+\currentvcell{#2}%
+ \OTRSETsetvsize}
+
+\def\OTRSETcheckprefered
+ {\ifnum\preferedcolumn<\mofcolumns
+ \let\pofcolumns\mofcolumns
+ \else
+ \let\pofcolumns\preferedcolumn
+ \fi
+ \ifquitincurrentcolumn
+ \ifnum\mofcolumns=\nofcolumns
+ \def\qofcolumns{\mofcolumns}%
+ \else
+ \scratchcounter\mofcolumns
+ \advance\scratchcounter \plusone
+ \edef\qofcolumns{\the\scratchcounter}%
+ \fi
+ \else
+ \let\qofcolumns\mofcolumns
+ \fi}
+
+\def\OTRSETstoreincolumnslotindeed#1#2#3#4#5#6#7#8#9%
+ {\OTRSETcheckprefered
+ \enoughcolumncellsfalse
+ \donefalse
+ \dostepwiserecurse{#1}{#2}{#31}
+ {\ifdone
+ \exitloop
+ \else
+ #4=\recurselevel
+ \dostepwiserecurse{#5}{#6}{#71}
+ {\ifdone
+ \exitloop
+ \else
+ #8=\recurselevel
+ \OTRSETcheckcolumnspace\currenthcell\currentvcell{#9}%
+ \ifenoughcolumncells \donetrue \fi
+ \fi}%
+ \fi}%
+ \ifdone
+ \enoughcolumncellstrue
+ \else
+ \enoughcolumncellsfalse
+ \fi
+ \ifenoughcolumncells
+% \ifnum\columnspacetopoffset>0\message{[+++]}\fi
+% \ifnum\columnspacebotoffset>0\message{[---]}\fi
+% \OTRSETsetgridcells\currenthcell\currentvcell\columnhcells\columnvcells
+% {\vbox
+% {\ifcase\columnspacetopoffset\else\ruledvskip\columnspacetopoffset\lineheight\fi
+% \copy#9
+% \ifcase\columnspacebotoffset\else\ruledvskip\columnspacebotoffset\lineheight\fi}}%
+ \OTRSETsetgridcells\currenthcell\currentvcell\columnhcells\columnvcells
+ {\copy#9}%
+ \ifnum\currenthcell=\mofcolumns\relax
+ \ifdim\ht\OTRSETsavedfootnotes>\zeropoint
+ \OTRSETsetfreecells\mofcolumns\columnfirstcell
+ \ifsomefreecolumncells
+ \getnoflines{\ht\OTRSETsavedfootnotes}\relax
+ \ifnum\columnfreecells<\noflines
+ \global\somefreecolumncellsfalse
+ \else
+ %\message{[flt]}% float
+ \fi
+ \fi
+ \ifsomefreecolumncells
+ % ok, enough room for notes
+ %\message{[flt]}% float
+ \else % ?
+ \OTRSETsavebox{#9}%
+ \OTRSETerasegridcells\currenthcell\currentvcell\columnhcells\columnvcells
+ %\message{[clr]}% save box
+ \fi
+ \else
+ %\message{[flt]}% float
+ \fi
+ \else
+ %\message{[flt]}% float
+ \fi
+ \OTRSETsetvsize
+ %\message{[fnt]}% float
+ \else
+ %\message{[rej]}% save box
+ \OTRSETsavebox{#9}%
+ \fi}
+
+\chardef\columnslotspacing \plusone
+
+\def\OTRSETstoreincolumnslot#1% #2 % {method} {box} % alleen last
+ {% no messing around here
+ % \dp#2=\zeropoint
+ % \ifcase\columnslotspacing\else
+ % \setbox#2=\vbox spread \columnslotspacing\lineheight
+ % {\vss\box#2\vss}%
+ % \fi
+ % and don't change this any more
+% \doifdefinedelse{\strippedcsname\OTRSETstoreincolumnslot#1}
+% {\getvalue{\strippedcsname\OTRSETstoreincolumnslot#1}{#2}}
+% {\OTRSETstoreincolumnslotUNKNOWN{#2}}}
+ \executeifdefined{\strippedcsname\OTRSETstoreincolumnslot#1}
+ \OTRSETstoreincolumnslotUNKNOWN} % {#2}}
+
+\def\OTRSETstoreincolumnslotUNKNOWN#1%
+ {\OTRSETprepareforcolumnslot2{#1}\copy#1} % {} ?
+
+% \def\OTRSETprepareforcolumnslot#1#2% 1=hoog 2=midden 3=laag
+% {\dp#2\zeropoint
+% \ifcase\columnslotspacing\else
+% \scratchdimen\columnslotspacing\lineheight
+% \ifnum#1=2 \scratchdimen2\scratchdimen \fi
+% \setbox#2\vbox spread \scratchdimen
+% {\ifnum#1>1\vss\fi\box#2\relax\ifnum#1<3\vss\fi}%
+% \fi}
+
+\def\OTRSETprepareforcolumnslot#1#2% 1=hoog 2=midden 3=laag
+ {\dp#2\zeropoint
+ \ifcase\columnslotspacing\else
+ \scratchdimen\columnslotspacing\lineheight
+ \ifnum#1=2 \scratchdimen2\scratchdimen \fi
+ \begingroup
+ \advance\scratchdimen\ht#2\relax
+ \ifdim\scratchdimen<\columnmaxcells\lineheight
+ \endgroup \setbox#2\vbox spread \scratchdimen \bgroup
+ \else
+ \endgroup \setbox#2\vbox to \columnmaxcells\lineheight \bgroup
+ \vskip\strutdepth
+ \fi
+ \ifnum#1>1\vss\fi
+ \box#2\relax
+ \ifnum#1<3\vss\fi
+ \egroup
+ \fi}
+
+\def\OTRSETdocheckiffloatfits % eigenlijk moet else float anders
+ {\global\ifnofloatpermitted\roomforfloatfalse\else\roomforfloattrue\fi}
+
+\def\OTRSETunpreparebox#1%
+ {\ifhbox#1% spans and so
+ \global\setbox\floatbox\vbox{\box#1}%
+ \else
+ \setbox\scratchbox\vbox
+ {\unvbox#1\unskip\unskip\unskip
+ \global\setbox\floatbox\lastbox}%
+ \fi}
+
+\def\OTRSETsavebox#1% clean up the skips
+ {\OTRSETunpreparebox{#1}%
+ \dosavefloat}
+
+\def\OTRSETresavebox#1% clean up the skips
+ {\OTRSETunpreparebox{#1}%
+ \doresavefloat}
+
+\def\OTRSETflushfloatbox % nog verder doorvoeren en meer info in marge
+ {\iftestfloatbox\ruledhbox\fi{\box\floatbox}}
+
+\def\OTRSETdoflushfloats
+ {\bgroup
+ \def\OTRSETsavebox##1{\!!doneafalse}%
+ \doloop
+ {\ifsomefloatwaiting
+\OTRSETskipstart
+ \dogetfloat
+ \ifdim\wd\floatbox>\zeropoint
+ \!!doneatrue
+ \dp\floatbox\zeropoint
+ \OTRSETstoreincolumnslot{TBLR}\floatbox
+ \if!!donea
+ %\message{[flu]}%
+ \else
+ \OTRSETresavebox\floatbox
+ \exitloop
+ \fi
+ \else
+ %\message{[err]}% happens but why?
+ \fi
+ \else
+ \exitloop
+ \fi}
+ \egroup}
+
+\newif\ifcentergridcells \centergridcellstrue
+
+\newif\ifcentergridcellonly \centergridcellonlyfalse
+\newif\ifautocentergridcellonly \autocentergridcellonlytrue
+
+\def\OTRSETcentergridcells
+ {\ifcentergridcells
+ \dorecurse\nofcolumns
+ {\currenthcell\recurselevel
+ \ifautocentergridcellonly
+ % we prevent centering when the next column is empty
+ % to be checked ! ! ! !
+ \advance\currenthcell \plusone
+ \centergridcellonlytrue
+ \ifnum\currenthcell>\nofcolumns
+ % ok already
+ \else
+ % only span if there is a next column with content
+ \dorecurse\columnmaxcells
+ {\ifdim\ht\OTRSETgridcell\currenthcell\currentvcell>\zeropoint
+ \centergridcellonlyfalse
+ \else\ifdim\dp\OTRSETgridcell\currenthcell\currentvcell>\zeropoint
+ \centergridcellonlyfalse
+ \fi\fi}%
+ \fi
+ \fi
+ \currenthcell\recurselevel
+ \dorecurse\columnmaxcells
+ {\currentvcell\recurselevel\relax
+ \ifdim\ht\OTRSETgridcell\currenthcell\currentvcell>\zeropoint
+ \ifdim\dp\OTRSETgridcell\currenthcell\currentvcell=\zeropoint
+ \bgroup
+ \setbox\scratchbox\OTRSETgetgridcell\currenthcell\currentvcell
+ \getnoflines{\ht\scratchbox}%
+ \!!counta\currentvcell
+ \advance\!!counta -\noflines
+ \advance\!!counta \plusone
+ % first col always ok
+ \!!countb\currenthcell
+ \!!countc\currenthcell
+ \advance\!!countc \plusone
+ \!!donebtrue
+ \ifcentergridcellonly
+ \!!countc\maxdimen
+ \fi
+ \dostepwiserecurse\!!countc\nofcolumns\plusone
+ {\if!!doneb
+ \let\xrecurselevel\recurselevel
+ \dostepwiserecurse\!!counta\currentvcell\plusone
+ {\ifdim\ht\OTRSETgridcell\xrecurselevel\recurselevel>\zeropoint
+ \!!donebfalse
+ \else\ifdim\wd\OTRSETgridcell\xrecurselevel\recurselevel>\zeropoint
+ \!!donebfalse
+ \fi\fi}%
+ \if!!doneb
+ \!!countb\xrecurselevel
+ \fi
+ \fi}%
+ \totalcolumnspace\OTRSETlocalwidth\currenthcell
+ \dostepwiserecurse\!!countc\!!countb\plusone
+ {\advance\totalcolumnspace \OTRSETlocalwidth\recurselevel
+ \advance\totalcolumnspace \OTRSETgetparameter\c!distance\recurselevel}%
+ \ifdim\totalcolumnspace>\wd\scratchbox
+ \setbox\scratchbox\hbox to \totalcolumnspace{\hss\box\scratchbox\hss}%
+ \fi
+ \OTRSETsetgridcell\currenthcell\currentvcell\box\scratchbox
+ \egroup
+ \fi
+ \fi}}%
+ \fi}
+
+\def\OTRSETinitializecolumns% once per page
+ {\columnspreadtrue % todo
+ \ifcolumnspread
+ \global\rofcolumns\getvalue{\??mc\OTRSETidentifier\c!nright}%
+ \global\lofcolumns\getvalue{\??mc\OTRSETidentifier\c!nleft}%
+ \global\tofcolumns\rofcolumns \relax
+ \ifodd\realpageno\relax
+ \global\nofcolumns\rofcolumns
+ \else
+ \global\advance\tofcolumns\lofcolumns
+ \global\nofcolumns\lofcolumns
+ \fi
+ \else
+ \global\nofcolumns\getvalue{\??mc\OTRSETidentifier\c!n}%
+ \global\rofcolumns\nofcolumns
+ \global\lofcolumns\nofcolumns
+ \global\tofcolumns\nofcolumns
+ \fi
+ \OTRSETassignwidths
+ \global\mofcolumns\plusone
+ \columnerasegridboxes}
+
+% vanaf hier:
+
+\def\definecolumnset
+ {\dodoubleargument\dodefinecolumnset}
+
+\def\dodefinecolumnset[#1][#2]%
+ {\getparameters[\??mc#1]
+ [\c!direction=\v!right,
+ \c!balance=\v!no,
+ \c!distance=1.5\bodyfontsize, % controleren
+ \c!n=2,
+ \c!nleft=\getvalue{\??mc#1\c!n},
+ \c!nright=\getvalue{\??mc#1\c!n},
+ \c!width=\v!fit,
+ \c!lines=0,
+ \c!start=0,
+ #2]%
+ \dorecurse{\getvalue{\??mc#1\c!nleft}} % todo
+ {\dododefinecolumnset[#1][\recurselevel]}%
+ \dorecurse{\getvalue{\??mc#1\c!nright}} % todo
+ {\dododefinecolumnset[#1][\recurselevel]}%
+ % redo framed settings
+ \setupcolumnset[#1][1][\c!distance=\!!zeropoint]}
+
+\def\dododefinecolumnset[#1][#2]%
+ {\presetlocalframed
+ [\??mc#1#2]%
+ \setupcolumnset
+ [#1][#2]
+ [\c!offset=\v!overlay,
+ \c!frame=\v!off,
+ \c!align=,
+ \c!lines=0,% really needed since c!regels is now part of framed
+ \c!width=\getvalue{\??mc#1\c!width},
+ \c!distance=\getvalue{\??mc#1\c!distance}]}
+
+\def\setupcolumnset
+ {\dotripleargument\dosetupcolumnset}
+
+\def\dosetupcolumnset[#1][#2][#3]%
+ {\ifthirdargument
+ \def\docommand##1%
+ {\doifelse{##1}\v!each
+ {\dorecurse{\getvalue{\??mc#1\c!n}}{\docommand\recurselevel}}
+ {\getparameters[\??mc#1##1][#3]}}%
+ \processcommalist[#2]\docommand
+ \else
+ \getparameters[\??mc#1][#2]%
+ \fi}
+
+\definecolumnset[\s!default][\c!n=2] % fallback
+
+\def\OTRSETgotonextpage
+ {\vfill\eject
+ \relax\ifnum\mofcolumns>\plusone
+ \OTRSETgotocolumn[\v!last]%
+ \ifnum\mofcolumns>\plusone
+ \OTRSETgotocolumn[\v!force]%
+ \fi
+ \fi}
+
+\let\OTRSETgotonextpageX\OTRSETgotonextpage % will become obsolete
+
+\def\OTRSETgotocolumn
+ {\dosingleempty\doOTRSETgotocolumn}
+
+\def\doOTRSETgotoCOLROW#1% <number>|<number>*<number>
+ {\bgroup % really needed
+ \splitstring#1\at*\to\column\and\row
+ \bgroup
+ \ifx\column\empty\else\expanded{\doOTRSETgotoCOLUMN{\column}}\fi
+ \egroup
+ \bgroup
+ \ifx\row \empty\else\expanded{\doOTRSETgotoROW {\row }}\fi
+ \egroup
+ \egroup}
+
+\def\doOTRSETgotoCOLUMN#1%
+ {\ifnum\mofcolumns=#1\else
+ \vfill\eject % \doejectpage\eject
+ \doloop
+ {\ifnum\mofcolumns=#1\relax
+ \exitloop \else \OTRSETdummycolumn
+ \fi}%
+ \fi}
+
+\def\doOTRSETgotoROW#1%
+ {\ifnum#1>1
+ \scratchcounter\zerocount
+ \currenthcell\mofcolumns
+ \currentvcell#1\advance\currentvcell \minusone
+ \dorecurse\currentvcell
+ {\OTRSETdoifcellelse\mofcolumns\recurselevel\donothing
+ {\advance\scratchcounter\plusone}}
+ \getnoflines\pagetotal
+ \advance\scratchcounter-\noflines
+ \ifnum\scratchcounter>\zerocount
+ \dorecurse\scratchcounter{\line{\strut}}%
+ \fi
+ \fi
+ \OTRSETsetvsize}
+
+\def\doOTRSETgotocolumn[#1]% yes|force|first|last|<number>|<number>*<number>
+ {\processallactionsinset
+ [#1]
+ [ \v!yes=>\OTRSETdummycolumn,
+ \v!no=>,% not supported
+ \v!force=>\OTRSETdummycolumn,
+ \v!first=>\expanded{\doOTRSETgotoCOLUMN{1}},
+ \v!last=>\expanded{\doOTRSETgotoCOLUMN{\the\nofcolumns}},
+ \s!default=>\OTRSETdummycolumn,
+ \s!unknown=>\expanded{\doOTRSETgotoCOLROW{\commalistelement}}]}
+
+% to be documented and tested, not yet that robust
+
+% \def\OTRSETgotocell#1#2%
+% {\endgraf
+% \gdef\gotocellcounter{0}%
+% \doloop
+% {\ifnum\mofcolumns<#1\relax
+% \doglobal\increment\gotocellcounter\relax
+% \ifnum\gotocellcounter>#1\relax
+% \line{\strut}\crlf
+% \line{\strut}\crlf
+% \column
+% \writestatus{columnset}{quitting goto cell}%
+% \exitloop
+% \else
+% \column
+% \fi
+% \else
+% \exitloop
+% \fi}%
+% \ifnum\mofcolumns=#1\relax
+% \ifnum#2>1
+% \scratchcounter\zerocount
+% \currenthcell\mofcolumns
+% \currentvcell#2\advance\currentvcell \minusone
+% \dorecurse\currentvcell
+% {\OTRSETdoifcellelse\mofcolumns\recurselevel\donothing
+% {\advance\scratchcounter\plusone}}
+% \getnoflines\pagetotal
+% \advance\scratchcounter-\noflines
+% \ifnum\scratchcounter>\zerocount
+% \dorecurse\scratchcounter{\line{\strut}}%
+% \fi
+% \fi
+% \fi
+% \OTRSETsetvsize}
+
+\def\OTRSETgotocell#1#2% obsolete: now \column[#1*#2]
+ {\endgraf
+ \doOTRSETgotoCOLUMN{#1}%
+ \doOTRSETgotoROW {#2}}
+
+\def\OTRSETdummycolumn
+ {\verticalstrut
+ \vskip-\struttotal
+ \vfill
+ \eject}
+
+\newcounter\columnsetlevel
+\let\currentcolumnset\empty
+\chardef\OTRSETfinish\zerocount
+
+\def\startcolumnset
+ {\dodoubleempty\dostartcolumnset}
+
+\def\dostartcolumnset[#1][#2]%
+ {\increment\columnsetlevel\relax
+ \globallet\localcolumnmaxcells\!!zerocount
+ \global\chardef\OTRSETfinish\zerocount
+ \resetOTRSETmarks
+ \ifnum\columnsetlevel=\plusone
+ \bgroup
+ \saveinterlinespace
+ \globallet\columnsetpage\!!plusone
+ \def\currentcolumnset{#2}%
+ \insidecolumnstrue % will be different flag in addition
+ \activateotr{SET}{ONE}% andere naam, activate or so
+ \doifelsenothing{#1}
+ {\globallet\OTRSETlist\s!default}
+ {\xdef\OTRSETlist{#1}}%
+ \OTRSETstartnextpage
+ \OTRSETassignwidths
+ \OTRSETsethsize
+ \else
+ \bgroup
+ \fi}
+
+% \setuplayout[grid=yes] \definecolumnset[example] \showgrid
+
+% \starttext
+% \startcolumnset[example]
+% \input knuth \endgraf \input knuth
+% \placetable{table}{\framed[width=\makeupwidth,height=4cm]{Hello}}
+% \input knuth \endgraf \input knuth
+% \stopcolumnset
+% \input knuth \endgraf \input knuth
+% \stoptext
+
+
+\def\OTRSETflushleftovers % new per 13/4/2006
+ {\OTRSETdoifcellelse{1}{1}
+ {\bgroup
+ \OTRSETcentergridcells
+ \chardef\OTRSETbalancemethod\plusone
+ \OTRSETreducegridbox
+ \global\setbox\OTRfinalpagebox\OTRSETmakegridbox
+ \global\ht\OTRfinalpagebox\textheight % signals output that there is content
+ \OTRSETdofinaloutput
+ \globallet\OTRSETbalht\zeropoint
+ \egroup}
+ {}}
+
+\def\stopcolumnset
+ {\relax
+ \ifnum\columnsetlevel=\plusone
+ \endgraf % needed, else wrong vsize in one par case
+ \global\chardef\OTRSETfinish\plusone
+ % no, extra page \pagebreak % (test on pascal toc)
+ \dostopcolumnset
+ \egroup
+ \global\notelimittrue % brrr, untested and fuzzy
+ \setvsize
+ \sethsize
+ \ifvoid\OTRfinalpagebox\else
+ % probably balanced
+ \ifdim\ht\OTRfinalpagebox<\textheight
+ \snaptogrid[\v!page]\hbox{\box\OTRfinalpagebox}%
+ \else
+ \box\OTRfinalpagebox
+ \fi
+ \fi
+ \global\chardef\OTRSETfinish\zerocount
+ \ifsomefloatwaiting \setvsize \pagebreak \setvsize \fi
+ \OTRSETflushleftovers
+ \else
+ \egroup
+ \fi
+ \decrement\columnsetlevel\relax}
+
+\chardef\OTRSETbalancemethod\zerocount
+
+\def\dostopcolumnset
+ {%\OTRSETdofinalflushfloats % yes/no
+ \ifcase\OTRSETbalancemethod
+ \OTRSETnobalance
+ \else
+ \OTRSETdobalance
+ \fi}
+
+\def\OTRSETdobalance
+ {\OTRSETnobalance}
+
+\def\localcolumnmaxcells{0}
+
+% currently line represents real line, i.e. on the grid, and
+% not something noflines (also, watch out for switching from
+% 2-3 columns on one page with both sets balanced: the
+% second set does not see the first set
+
+% \def\OTRSETinitbalancing
+% {\ifcase\OTRSETbalancemethod\or
+% \let\savedcolumnmaxcells\columnmaxcells
+% \ifnum\realpageno=\balancingpageno\relax
+% \ifnum\mofcolumns=\plusone
+% \dorecurse\nofcolumns
+% {\!!counta\recurselevel\relax
+% \!!countb\getvalue{\??mc\OTRSETidentifier\number\!!counta\c!regels}\relax
+% \ifcase\!!countb
+% \!!countb\getvalue{\??mc\OTRSETidentifier\c!regels}\relax
+% \fi
+% \ifcase\!!countb
+% \!!countb \savedcolumnmaxcells\relax
+% \fi
+% % can be an option: absolute versus relative
+% \ifnum\OTRSETbalancemethod=\plusthree
+% \advance\!!countb\precolumnlines
+% \ifnum\!!countb>\localcolumnmaxcells\relax
+% \xdef\localcolumnmaxcells{\the\!!countb}%
+% \fi
+% \advance\!!countb \plusone
+% \dostepwiserecurse\!!countb\columnmaxcells\plusone
+% {\ifvoid\OTRSETgridcell\!!counta\recurselevel
+% \OTRSETsetgridcell\!!counta\recurselevel\copy\placeholderboxe
+% \fi}%
+% \else
+% \globallet\localcolumnmaxcells\columnmaxcells
+% \advance\!!countb-\columnmaxcells
+% \!!countb-\!!countb
+% \advance\!!countb \minusone
+% \ifnum\!!countb>\zerocount
+% \dostepwiserecurse\plusone\!!countb\plusone
+% {\ifvoid\OTRSETgridcell\!!counta\recurselevel
+% \OTRSETsetgridcell\!!counta\recurselevel\copy\placeholderboxe
+% \fi}%
+% \fi
+% \fi}%
+% \OTRSETsetvsize % ! ! !
+% \fi
+% \fi
+% \fi}
+%
+% \def\OTRSETpresetbalancing
+% {\doifvaluesomething{\??mc\OTRSETidentifier\c!regels}%
+% {\getcommacommandsize[\csname\??mc\OTRSETidentifier\c!regels\endcsname]%
+% \ifnum\commalistsize>\plusone
+% \scratchcounter\zerocount
+% \def\docommand##1%
+% {\advance\scratchcounter\plusone
+% \setvalue{\??mc\OTRSETidentifier\the\scratchcounter\c!regels}{##1}}%
+% \processcommacommand
+% [\csname\??mc\OTRSETidentifier\c!regels\endcsname]\docommand
+% \setvalue{\??mc\OTRSETidentifier\c!regels}{0}%
+% \fi}}
+
+% don't loose empty 1page/1column with area (example **)
+%
+% \definecolumntextarea[title][x=1,y=4,nx=2,ny=7,state=start]
+% \setupcolumntextareatext[title][\vtop to 5cm{a\\b\\b\\d}]
+%
+% \starttext
+% \startcolumnset \dorecurse{1}{\input tufte \par} \stopcolumnset
+% \stoptext
+
+% better:
+
+\def\definecolumnsetarea {\definecolumntextarea}
+\def\setupcolumnsetarea {\setupcolumntextarea}
+\def\setupcolumnsetareatext{\setupcolumntextareatext}
+
+% so this will be changed
+
+% \def\OTRSETnobalance
+% {\iflastcolumnfootnotes % testen ! optie
+% % inhibit flush of floats !
+% % todo: nothing if no footnotes, else empty page
+% \dostepwiserecurse\mofcolumns\nofcolumns\plusone
+% {\vskip-\struttotal\verticalstrut\vfill\eject}%
+% \else
+% \ifdim\pagetotal>\zeropoint % no, see example **
+% \ifnum\mofcolumns=\nofcolumns
+% \OTRSETflushfinalfootnotes
+% \else
+% % probably todo
+% \fi
+% \vfill
+% \eject
+% % brr, may result in empty page after nicely fit text
+% % or if left, then lost of first column only text
+% \ifnum\mofcolumns>1
+% \OTRSETdofinalflush
+% \OTRSETdofinaloutput
+% \fi
+% \fi
+% \fi}
+
+\def\OTRSETnobalance
+ {\iflastcolumnfootnotes % testen ! optie
+ % inhibit flush of floats !
+ % todo: nothing if no footnotes, else empty page
+ \dostepwiserecurse\mofcolumns\nofcolumns\plusone
+ {\vskip-\struttotal\verticalstrut\vfill\eject}%
+ \else
+ \ifnum\mofcolumns>\plusone
+ \donetrue
+ \else\ifdim\pagetotal>\zeropoint % too dangerous, we loose data
+ \donetrue
+ \else
+ \donefalse
+ \fi\fi
+ \ifdone
+ \ifnum\mofcolumns=\nofcolumns
+ \OTRSETflushfinalfootnotes
+ \else
+ % probably todo
+ \fi
+ \vfill
+ \eject
+\registerOTRSETmarks
+ % brr, may result in empty page after nicely fit text
+ % or if left, then lost of first column only text
+ \ifnum\mofcolumns>\plusone
+ \OTRSETdofinalflush
+ \OTRSETdofinaloutput
+ \fi
+ \fi
+ \fi}
+
+\def\OTRSETstartnextpage
+ {\doifsomething\OTRSETlist
+ {\getfromcommacommand[\OTRSETlist][1]%
+ \global\let\OTRSETidentifier\commalistelement
+ \doifundefined{\??mc\OTRSETidentifier\c!n}
+ {\globallet\OTRSETidentifier\s!default}%
+ \let\newcommalistelement\empty
+ \doglobal\replaceincommalist\OTRSETlist1%
+ \OTRSETrestart}}
+
+\def\OTRSETrestart % weed
+ {\OTRSETinitializefeatures
+ \OTRSETflushpreposttext
+ \OTRSETinitializecolumns
+ \OTRSETcheckinsert
+ \OTRSETcheckgrid
+ \OTRSETsetvsize
+ \OTRSETsethsize % or local ?
+ \OTRSETsetplaceholders
+ \OTRSEThandlepreposttext
+ \initializecolumntextareas % name !
+ \OTRSETcheckstartcells
+ \OTRSETsetvsize}
+
+% \def\OTRSETcheckstartcells
+% {\dorecurse\nofcolumns
+% {\bgroup
+% \mofcolumns\recurselevel
+% \scratchcounter\currentcolumnstartcell % uses \mofcolumns, returns 1 or more
+% \advance\scratchcounter \minusone
+% \dorecurse\scratchcounter
+% {\OTRSETdoifcellelse\mofcolumns\recurselevel
+% \donothing{\OTRSETsetgridcell\mofcolumns\recurselevel\copy\placeholderboxe}}%
+% \egroup}}
+
+\def\OTRSETcheckstartcells
+ {\dorecurse\nofcolumns
+ {\bgroup
+ \mofcolumns\recurselevel
+\OTRSETsetcorrectnofcells\currentcolumnstartcell
+\advance\scratchcounter \minusone
+ \dorecurse\scratchcounter
+ {\OTRSETdoifcellelse\mofcolumns\recurselevel
+ \donothing{\OTRSETsetgridcell\mofcolumns\recurselevel\copy\placeholderboxe}}%
+ \egroup}}
+
+% \OTRSEToutput
+% {\dontcomplain % new, get rid of overfull message (to be sorted out)
+% \OTRSETnaturalflush
+% %\OTRSETstartnextpage
+% \OTRSETdoflushfloats % actually belongs in \flushsavedfloats (but goes wrong)
+% \OTRSETcheckfreelines
+% \OTRSETchecksidefloat}
+
+\OTRSEToutput
+ {\dontcomplain % new, get rid of overfull message (to be sorted out)
+ \doloop
+ {\OTRSETnaturalflush
+ %\OTRSETstartnextpage % no
+ \OTRSETdoflushfloats % actually belongs in \flushsavedfloats (but goes wrong)
+ \OTRSETcheckfreelines
+ \ifsomefreecolumncells
+ \exitloop
+ \else
+ % flush page and get rid of more floats if present
+ \fi}%
+ \OTRSETchecksidefloat}
+
+\def\OTRSETinitializefeatures
+ {% number of lines
+ % new: raw
+ \getrawnoflines\textheight\xdef\columnmaxcells{\the\noflines}%
+ % direction
+ \doifelsevalue{\??mc\OTRSETidentifier\c!direction}\v!right
+ {\chardef\columndirection\zerocount}
+ {\chardef\columndirection\plusone}%
+ % balancing
+ \chardef\OTRSETbalancemethod\zerocount
+ \processaction
+ [\getvalue{\??mc\OTRSETidentifier\c!balance}]
+ [ \v!yes=>\chardef\OTRSETbalancemethod\plusone,
+ \v!top=>\chardef\OTRSETbalancemethod\plustwo,
+ \v!bottom=>\chardef\OTRSETbalancemethod\plusthree]}
+
+% keep 'm for a while
+%
+% \installoutput\OTRSETflushpreposttext
+% {\global\setbox\precolumnbox\vbox{\unvbox\normalpagebox}%
+% \ifcarryoverfootnotes \else
+% \global\setbox\postcolumnbox\vbox{\placebottomnotes}%
+% \fi}
+%
+% to be tested on 'boekinhoud' in 'pascal/demo-bbi'
+%
+% junk ! ! ! ! !
+%
+%\installoutput\OTRSETflushpreposttext
+% {\global\setbox\precolumnbox\vbox
+% {\unvbox\normalpagebox
+% \strut\vskip-2\lineheight\strut}% we want a proper depth
+% \ifcarryoverfootnotes \else
+% \global\setbox\postcolumnbox\vbox{\placebottomnotes}%
+% \fi}
+%
+% \starttext
+% \definecolumnset[two][n=2]
+% \startcolumnset[two] \dorecurse{4}{\input tufte } \stopcolumnset
+% \input tufte
+% \startcolumnset[two] \input tufte \stopcolumnset
+% \stoptext
+%
+% \installoutput\OTRSETflushpreposttext
+% {\global\setbox\precolumnbox\vbox{\unvbox\normalpagebox}%
+% \global\dp\precolumnbox\strutdepth
+% \ifcarryoverfootnotes \else
+% \global\setbox\postcolumnbox\vbox{\placebottomnotes}%
+% \fi}
+
+% test:
+%
+% \definecolumnset[two] [n=2,balance=yes]
+% \definecolumnset[three][n=3,balance=yes]
+% \setupcolumnset [two] [1] [lines=10]
+% \setupcolumnset [two] [2] [lines=10]
+%
+% \startcolumnset[two] \dorecurse{14}{\input tufte \par} \stopcolumnset
+% \startcolumnset[three] \dorecurse{12}{\input tufte \par} \stopcolumnset
+%
+% with:
+%
+% \installoutput\OTRSETflushpreposttext
+% {%\ifvoid\normalpagebox
+% % \global\setbox\precolumnbox\vbox{}%
+% %\else
+% \global\setbox\precolumnbox\vbox
+% {\unvcopy\normalpagebox}%
+% \global\setbox\precolumnbox\vbox to \ht\precolumnbox
+% {\box\normalpagebox}%
+% %\fi
+% \global\dp\precolumnbox\strutdepth
+% \ifcarryoverfootnotes \else
+% \global\setbox\postcolumnbox\vbox{\placebottomnotes}%
+% \fi}
+
+% testcase : pascal demo-bbi, paragraaf/aanduiding koppen
+
+\ifx\lastskipinotr\undefined \newskip\lastskipinotr \fi
+
+\installoutput\OTRSETflushpreposttext
+ {\global\setbox\precolumnbox\vbox
+ {\unvbox\normalpagebox
+ \global\lastskipinotr\lastskip}%
+ \ifdim\lastskipinotr>\zeropoint
+ \global\setbox\precolumnbox\hbox
+ {\lower\strutdepth\box\precolumnbox}%
+ \fi
+ \global\dp\precolumnbox\strutdepth
+ \ifcarryoverfootnotes \else
+ \global\setbox\postcolumnbox\vbox{\placebottomnotes}%
+ \fi}
+
+\let\precolumnlines \!!zerocount
+\let\postcolumnlines\!!zerocount
+
+% \def\OTRSEThandlepreposttext
+% {\ifdim\ht\precolumnbox>\zeropoint % new
+% \getnoflines{\ht\precolumnbox}%
+% \edef\precolumnlines{\the\noflines}%
+% \doOTRSETsetgridcells
+% {\copy\placeholderboxe}
+% \plusone\plusone\nofcolumns\noflines
+% {\box\precolumnbox}%
+% \else
+% \let\precolumnlines\!!zerocount
+% \fi
+% \ifdim\ht\postcolumnbox>\zeropoint % new, otherwise empty bottom line
+% \getnoflines{\ht\postcolumnbox}%
+% \edef\postcolumnlines{\the\noflines}%
+% \advance\columnfreecells -\noflines
+% \advance\columnfreecells \plusone
+% \doOTRSETsetgridcells
+% {\copy\placeholderboxe}
+% \plusone\columnfreecells\nofcolumns\noflines
+% {\box\postcolumnbox}%
+% \else
+% \let\postcolumnlines\!!zerocount
+% \fi}
+
+\def\OTRSEThandlepreposttext
+ {\ifdim\ht\precolumnbox>\zeropoint % new
+ \getnoflines{\ht\precolumnbox}%
+ \edef\precolumnlines{\the\noflines}%
+ \doOTRSETsetgridcells
+ {\copy\placeholderboxe}
+ \plusone\plusone\nofcolumns\noflines
+ % normal version (single column set)
+ % {\box\precolumnbox}%
+ % compensated for bodyfont change
+ {\hbox
+ {\OTRSETsetcorrectcellht
+ \raise\scratchdimen\box\precolumnbox}}%
+ \else
+ \let\precolumnlines\!!zerocount
+ \fi
+ \ifdim\ht\postcolumnbox>\zeropoint % new, otherwise empty bottom line
+ \getnoflines{\ht\postcolumnbox}%
+ \edef\postcolumnlines{\the\noflines}%
+ \advance\columnfreecells -\noflines
+ \advance\columnfreecells \plusone
+ \doOTRSETsetgridcells
+ {\copy\placeholderboxe}
+ \plusone\columnfreecells\nofcolumns\noflines
+ {\box\postcolumnbox}%
+ \else
+ \let\postcolumnlines\!!zerocount
+ \fi}
+
+\def\OTRSETchecksidefloat
+ {} % {\sidefloatoutput}
+
+\def\OTRSETfinalsidefloatoutput
+ {}
+
+\def\OTRSETcheckgrid
+ {\topskip1\topskip
+ \ifforcecolumngrid
+ \widowpenalty\zerocount
+ \clubpenalty\zerocount
+ \brokenpenalty\zerocount
+ \fi}
+
+\def\OTRSETcheckinsert
+ {\iflastcolumnfootnotes
+ \ifnum\nofcolumns=\mofcolumns
+ \OTRSETforceinserts
+ \else
+ \OTRSETinhibitinserts
+ \fi
+ \else
+ \OTRSETforceinserts
+ \fi}
+
+\def\OTRSETforceinserts
+ {\enablenotes}
+
+\def\OTRSETinhibitinserts
+ {\disablenotes}
+
+% interface to footnotes
+
+\def\OTRSETassignwidths
+ {%\scratchdimen\makeupwidth
+ \freezetextwidth \scratchdimen\textwidth
+ %
+ \scratchcounter\zerocount
+ \dorecurse\nofcolumns
+ {\doifelsevalue{\??mc\OTRSETidentifier\recurselevel\c!width}\v!fit
+ {\advance\scratchcounter \plusone }
+ {\advance\scratchdimen -\getvalue{\??mc\OTRSETidentifier\recurselevel\c!width}}%
+ \advance\scratchdimen -\getvalue{\??mc\OTRSETidentifier\recurselevel\c!distance}}%
+ \ifcase\scratchcounter\else
+ \divide\scratchdimen \scratchcounter
+ \fi
+ \setgvalue{\??mc\??mc\c!width}{0}%
+ \dorecurse\nofcolumns
+ {\doifelsevalue{\??mc\OTRSETidentifier\recurselevel\c!width}\v!fit
+ {\dimen0=\scratchdimen}
+ {\setgvalue{\??mc\??mc\c!width}{1}%
+ \dimen0=\getvalue{\??mc\OTRSETidentifier\recurselevel\c!width}}%
+ \setxvalue{\??mc\recurselevel\??mc\c!width}{\the\dimen0}}}
+
+\def\OTRSETlocalwidth#1%
+ {\getvalue{\??mc\number#1\??mc\c!width}}
+
+\newbox\placeholderboxa
+\newbox\placeholderboxb
+\newbox\placeholderboxc
+\newbox\placeholderboxd
+\newbox\placeholderboxe
+\newbox\placeholderboxf
+
+\def\columnplaceholder#1#2%
+ {\hbox
+ {\localcolortrue
+ \setbox\scratchbox\hbox to \hsize
+ {\iftracecolumnset \incolortrue \localcolortrue
+ \hskip-.5ex%
+ \startcolor[columnset:#2]\vrule\!!width1ex\!!height.5ex\!!depth.5ex\stopcolor
+ \fi
+ \hss}%
+ \ifcase#1\relax
+ \ht\scratchbox\zeropoint
+ \dp\scratchbox\zeropoint
+ \wd\scratchbox\zeropoint
+ \else
+ \wd\scratchbox\hsize
+ \ht\scratchbox\strutht
+ \dp\scratchbox\strutdp
+ \fi
+ \box\scratchbox}}
+
+\definepalet
+ [columnset]
+ [a=cyan,b=green,c=blue,d=red,e=magenta,f=darkgray]
+
+\def\OTRSETsetplaceholders
+ {\global\setbox\placeholderboxa\columnplaceholder0a%
+ \global\setbox\placeholderboxb\columnplaceholder0b%
+ \global\setbox\placeholderboxc\columnplaceholder0c%
+ \global\setbox\placeholderboxd\columnplaceholder0d%
+ \global\setbox\placeholderboxe\columnplaceholder0e%
+ \global\setbox\placeholderboxf\columnplaceholder1f}
+
+\def\doOTRSETshowstatus
+ {\llap{\incolortrue \localcolortrue \tt\tfxx
+ \startcolor[blue](\the\vsize->\number\columnfirstcell\#\number\columnfreecells)\stopcolor
+ \hskip\leftskip}}
+
+\def\OTRSETshowstatus
+ {\iftracecolumnset \doOTRSETshowstatus \fi}
+
+% \appendtoks \OTRSETshowstatus \to \everypar
+
+% page contents
+
+\def\OTRSETdopagecontents#1#2% takes two args: \box<n> \unvbox<n>
+ {\vbox to \textheight{\forgetall#1#2\pushproperties}}
+
+\def\OTRSETsomepagefloat {\def\floatmethod{PAGE}\OTRSETsomeslotfloat} % check
+\def\OTRSETsomeherefloat {\def\floatmethod{HERE}\OTRSETsomeslotfloat} % check
+\def\OTRSETsomeelsefloat {\def\floatmethod{HERE}\OTRSETsomeslotfloat} % check
+\def\OTRSETsomefixdfloat {\def\floatmethod{FIXD}\OTRSETsomeslotfloat} % check
+\def\OTRSETsometopfloat {\def\floatmethod{TOPS}\OTRSETsomeslotfloat} % check
+\def\OTRSETsomebottomfloat{\def\floatmethod{BOTS}\OTRSETsomeslotfloat} % check
+
+\def\OTRSETflushfloatbox % nog verder doorvoeren en meer info in marge
+ {\iftestfloatbox\ruledhbox\fi{\box\floatbox}}
+
+\def\OTRSETsomeslotfloat[#1]%
+ {\setbox\floatbox\vbox{\flushfloatbox}%
+ \dp\floatbox\strutdp
+ \@EA\uppercasestring\floatmethod\to\floatmethod
+ \OTRSETstoreincolumnslot\floatmethod\floatbox
+ \doinsertfloatinfo}
+
+% kind of new, looks much like OTRONE, but not entirely
+
+\def\OTRSETdosettopinserts
+ {\bgroup
+ \ifsomefloatwaiting
+ \noffloatinserts\zerocount
+ \let\totaltopinserted\!!zeropoint
+ \OTRSETdodosettopinserts
+ \ifnum\@@bknbottom=\zerocount
+ \ifnum\@@bknlines>\zerocount
+ \ifdim\totaltopinserted>\zeropoint\relax
+ \dimen0\lineheight
+ \dimen0=\@@bknlines\dimen0
+ \advance\dimen0 \totaltopinserted\relax
+ \ifdim\dimen0>\textheight % \vsize %%%%%%%%% \textheight
+ \showmessage\m!floatblocks8{\@@bknlines}%
+ \vfilll\eject
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \egroup}
+
+\def\OTRSETdodosettopinserts
+ {\ifnum\noffloatinserts<\noftopfloats
+ \dogetfloat
+ \ifdim\topinserted=\zeropoint\relax
+ \topofinserttrue
+ \else
+ \topofinsertfalse
+ \fi
+ \setbox\scratchbox\vbox % kan beter !
+ {\forgetall
+ \iftopofinsert
+ \ifdim\OTRSETtopoffset=\zeropoint
+ \moveongrid[\v!top]
+ \fi
+ \else
+ \betweenfloatblanko % inserts can't look back
+ \fi
+ \flushfloatbox
+ \blank[\@@bkspaceafter]}%
+ \global\advance\topinserted \ht\scratchbox\relax
+ \ifdim\topinserted>\vsize % was \textheight\relax
+ \OTRSETresavebox\floatbox
+ \noffloatinserts\noftopfloats\relax
+ \global\advance\topinserted -\ht\scratchbox
+ \let\OTRSETdodosettopinserts\relax % to be tested
+ \else
+ \xdef\totaltopinserted{\the\topinserted}%
+ \insert\topins{\forgetall\box\scratchbox}% interlineskip ?
+ \ifsomefloatwaiting
+ \advance\noffloatinserts \plusone
+ \else
+ \noffloatinserts\noftopfloats\relax
+ \fi
+ \dofloatflushedinfo
+ \fi
+ \else
+ \ifsomefloatwaiting
+ \showmessage\m!floatblocks6{\the\noftopfloats}%
+ \fi
+ \let\OTRSETdodosettopinserts\relax
+ \fi
+ \OTRSETdodosettopinserts}
+
+\def\OTRSETdosetbotinserts
+ {\bgroup
+ \ifsomefloatwaiting
+ \noffloatinserts\zerocount
+ \OTRSETdodosetbotinserts
+ \fi
+ \egroup}
+
+\def\OTRSETdodosetbotinserts
+ {\ifnum\noffloatinserts<\nofbotfloats\relax
+ \dogetfloat
+ \global\advance\botinserted \ht\floatbox\relax
+ \global\advance\botinserted \dp\floatbox\relax
+ \global\advance\botinserted \floattopskip\relax
+ \ifdim\botinserted<\pagegoal\relax
+ \insert\botins
+ {\forgetall
+ \blank[\@@bkspacebefore]%
+ \flushfloatbox}%
+ \ifsomefloatwaiting
+ \advance\noffloatinserts \plusone
+ \else
+ \noffloatinserts\nofbotfloats
+ \fi
+ \dofloatflushedinfo
+ \else
+ \OTRSETresavebox\floatbox
+ \noffloatinserts\nofbotfloats\relax
+ \fi
+ \global\nofloatpermittedtrue % vgl topfloats s!
+ \else
+ \ifsomefloatwaiting
+ \showmessage\m!floatblocks7{\the\nofbotfloats}%
+ \fi
+ \let\OTRSETdodosetbotinserts\relax
+ \fi
+ \OTRSETdodosetbotinserts}
+
+\let\OTRSETdosetbothinserts\relax
+
+\def\OTRSETdotopinsertions
+ {\ifvoid\topins\else
+ \ifvoid\columntopbox\mofcolumns
+ \columnsettopbox\mofcolumns\box\topins
+ \else
+ \columnsettopbox\mofcolumns\vbox % temp, must be better
+ {\forgetall
+ \offinterlineskip
+ \box\columntopbox\mofcolumns
+ \box\topins}
+ \fi
+ \fi
+ \global\topinserted\zeropoint\relax} % goes away
+
+\def\OTRSETdobotinsertions
+ {\ifvoid\botins \else
+ \columnsetbotbox\mofcolumns\box\botins
+% \else
+% \columnsetbotbox\mofcolumns\vbox % temp, must be better
+% {\forgetall
+% \offinterlineskip
+% \box\botins
+% \box\columnbotbox\mofcolumns}
+ \fi
+ \global\botinserted\zeropoint\relax} % goes away
+
+% set ipv text
+
+% left right 1 2 3 +1 +2 +3
+
+\let\columnleftareas \empty
+\let\columnrightareas\empty
+
+% links rechts => odd, even, n, named
+
+\def\definecolumntextarea
+ {\dotripleempty\dodefinecolumntextarea}
+
+\def\dodefinecolumntextarea[#1][#2][#3]% y=0 is mogelijke en handig !
+ {\ifthirdargument
+ \doifinsetelse{#2}{\v!both,\v!fixed}
+ {\definecolumntextarea[#1][\v!left ][\c!type=#2,#3]%
+ \definecolumntextarea[#1][\v!right][\c!type=#2,#3]}
+ {\doifelse{#2}\v!next
+ {\doifoddpageelse
+ {\definecolumntextarea[#1][\v!right][\c!type=#2,#3]}
+ {\definecolumntextarea[#1][\v!left ][\c!type=#2,#3]}}
+ {\presetlocalframed
+ [\??mt#1#2]%
+ \processaction[#2] % \doglobal voorkomt stack build up
+ [ \v!left=>\doglobal\addtocommalist{#1}\columnleftareas,
+ \v!right=>\doglobal\addtocommalist{#1}\columnrightareas]%
+ \getparameters[\??mt#1#2]
+ [\c!x=1,\c!y=1,\c!nx=1,\c!ny=1,\c!clipoffset=2\lineheight,
+ \c!offset=\v!overlay,\c!strut=\v!no,\c!frame=\v!off,
+ \c!type=#2,\c!page=1,\c!state=\v!stop,#3]}}%
+ \else
+ \definecolumntextarea[#1][\v!next][#2]%
+ \fi}
+
+\def\setupcolumntextarea
+ {\dotripleempty\dosetupcolumntextarea}
+
+\def\dosetupcolumntextarea[#1][#2][#3]%
+ {\ifthirdargument
+ \doifelse{#2}\v!both
+ {\setupcolumntextarea[#1][\v!left ][#3]%
+ \setupcolumntextarea[#1][\v!right][#3]}
+ {\doifelse{#2}\v!next
+ {\doifoddpageelse
+ {\setupcolumntextarea[#1][\v!right][#3]}
+ {\setupcolumntextarea[#1][\v!left][#3]}}
+ {\getparameters[\??mt#1#2][#3]}}%
+ \else
+ \setupcolumntextarea[#1][\v!next][#2]%
+ \fi}
+
+\def\docheckcolumnsetareapage#1#2%
+ {\ifnum\getvalue{\??mt#1\c!page}>\plusone
+ \doifelsevalue{\??mt#1\c!type}\v!fixed
+ {\ifnum\columnsetpage=\getvalue{\??mt#1\c!page}\relax
+ \donetrue\else\donefalse
+ \fi}
+ {\ifnum\columnsetpage<\getvalue{\??mt#1\c!page}\relax
+ \donefalse\else\donetrue
+ \fi}%
+ \else
+ \donetrue
+ \fi}
+
+\def\initializecolumntextareas
+ {\ifodd\realpageno
+ \doinitializecolumntextareas\columnrightareas\v!right
+ \else
+ \doinitializecolumntextareas\columnleftareas\v!left
+ \fi}
+
+\def\doinitializecolumntextareas#1#2%
+ {\def\docommand##1%
+ {\docheckcolumnsetareapage{##1#2}\plusone
+ \ifdone
+ \donefalse
+ \processaction
+ [\getvalue{\??mt##1#2\c!state}]
+ [ \v!start=>\donetrue,
+ \v!repeat=>\donetrue,
+ \s!unknown=>\doperformtest\commalistelement\donetrue\donefalse]%
+ \ifdone\dodoinitializecolumntextareas{##1}{#2}\fi
+ \fi}%
+ \processcommacommand[#1]\docommand}
+
+\def\dodoinitializecolumntextareas#1#2%
+ {\doOTRSETsetgridcells
+ {\copy\placeholderboxd}
+ {\getvalue{\??mt#1#2\c!x }}{\getvalue{\??mt#1#2\c!y }}
+ {\getvalue{\??mt#1#2\c!nx}}{\getvalue{\??mt#1#2\c!ny}}
+ {\copy\placeholderboxd}}
+
+\def\placecolumntextareas
+ {\ifodd\realpageno
+ \doplacecolumntextareas\columnrightareas\v!right
+ \else
+ \doplacecolumntextareas\columnleftareas\v!left
+ \fi}
+
+\def\doplacecolumntextareas#1#2% global ?
+ {\bgroup
+ \forgetall
+ \def\docommand##1%
+ {\docheckcolumnsetareapage{##1#2}\zerocount
+ \ifdone
+ \donefalse
+ \processaction
+ [\getvalue{\??mt##1#2\c!state}]
+ [ \v!start=>\donetrue\doglobal\removefromcommalist{##1}#1,
+ \v!repeat=>\donetrue,
+ \s!unknown=>\doperformtest\commalistelement\donetrue\donefalse]%
+ \ifdone
+ \dodoplacecolumntextareas{##1}{#2}%
+ \else
+ \doglobal\removefromcommalist{##1}#1%
+ \fi
+ \fi}%
+ \processcommacommand[#1]\docommand
+ \egroup}
+
+% \page[left]
+% \definecolumntextarea[intro][left][x=1,y=1,nx=4,ny=20,state=start,background=introlayer]
+% \setupcolumntextareatext[intro][left][\setups{intro}]
+% \flushcolumntextareas
+
+\def\flushcolumntextareas
+ {\initializecolumntextareas
+ \setvsize}
+
+\def\columntextlastbackspace{\backspace}
+
+% beware, we have clipping offsets of 2\lineheight by default
+
+\def\columntextareaparameter#1%
+ {\csname\??mt\currentcolumntestarea#1\endcsname}
+
+\def\dodoplacecolumntextareas#1#2%
+ {\def\currentcolumntestarea{#1#2}%
+ \!!counta\columntextareaparameter\c!x
+ \!!countb\columntextareaparameter\c!nx
+ \docalculatecolumnsetspan
+ \!!heighta\columntextareaparameter\c!ny\lineheight
+ % wrong
+ % \ifnum\columntextareaparameter\c!y=\zerocount
+ % \advance\!!heighta -\lineheight
+ % \advance\!!heighta \topskip
+ % \fi
+ % \advance\!!heighta -\lineheight % option
+ \ifnum\columntextareaparameter\c!y=\plusone
+ \advance\!!heighta -\lineheight
+ \advance\!!heighta \topskip
+ \fi
+ %
+ \setbox\scratchbox\vbox
+ {\donetrue\localframed
+ [\??mt\currentcolumntestarea]
+ [\c!location=,% new (*)
+ \c!width=\!!widtha,\c!height=\!!heighta,\c!lines=]
+ {\columntextareaparameter\empty}}%
+ \!!counta\columntextareaparameter\c!x
+ \!!countb\columntextareaparameter\c!y
+ \advance\!!countb \columntextareaparameter\c!ny
+ \advance\!!countb \minusone
+ % new (*)
+ \doif{\columntextareaparameter\c!location}\v!depth
+ {\setbox\scratchbox\hbox{\lower\strutdepth\box\scratchbox}%
+ \dp\scratchbox\zeropoint
+ \ht\scratchbox\!!heighta}%
+ %
+ \setbox0\hbox
+ {\ifcase\!!countc
+ \copy\scratchbox % \box
+ \else
+ \clip
+ [ %\c!topoffset=\columntextareaparameter\c!clipoffset,%
+ %\c!bottomoffset=\columntextareaparameter\c!clipoffset,%
+ %\c!leftoffset=\columntextareaparameter\c!clipoffset,%
+ \c!offset=\columntextareaparameter\c!clipoffset,%
+ \c!rightoffset=\zeropoint,%
+ \c!width=\!!widthb,%
+ \c!height=\!!heighta]%
+ {\copy\scratchbox}%
+ \fi}%
+ \OTRSETsetgridcell\!!counta\!!countb\box0
+ \ifcase\!!countc\else
+ \advance\!!counta \columntextareaparameter\c!nx
+ \advance\!!counta -\!!countc
+ \advance\!!widtha -\!!widthb
+ \setbox0\hbox
+ {\hskip-\namedlayoutparameter\v!odd\c!backspace
+ \clip
+ [ %\c!topoffset=\columntextareaparameter\c!clipoffset,%
+ %\c!bottomoffset=\columntextareaparameter\c!clipoffset,%
+ %\c!rightoffset=\columntextareaparameter\c!clipoffset,%
+ \c!offset=\columntextareaparameter\c!clipoffset,%
+ \c!leftoffset=\zeropoint,%
+ \c!width=\!!widtha,%
+ \c!height=\!!heighta,%
+ \c!hoffset=\!!widthb]%
+ {\copy\scratchbox}}%
+ \OTRSETsetgridcell\!!counta\!!countb\box0%
+ \fi}
+
+\def\setupcolumntextareatext
+ {\dotripleempty\dosetupcolumntextareatext}
+
+\long\def\dosetupcolumntextareatext[#1][#2][#3]%
+ {\ifthirdargument
+ \doifelse{#2}\v!both
+ {\setvalue{\??mt#1\v!left }{#3}%
+ \setvalue{\??mt#1\v!right}{#3}}
+ {\doifelse{#2}\v!next
+ {\doifoddpageelse
+ {\setvalue{\??mt#1\v!right}{#3}}%
+ {\setvalue{\??mt#1\v!left }{#3}}}%
+ {\setvalue{\??mt#1#2}{#3}}}%
+ \else
+ \setupcolumntextareatext[#1][\v!next][{#2}]%
+ \fi}
+
+\def\docalculatecolumnsetspan
+ {% \!!counta <= x
+ % \!!countb <= nx
+ % \!!widtha => total width
+ % \!!widthb => left width
+ % \!!countc => left cols
+ \!!widtha\!!countb\textwidth % we assume equal widths
+ \advance\!!countb \!!counta
+ \advance\!!countb \minusone
+ \ifnum\!!countb>\nofcolumns
+ \!!countc\!!countb
+ \advance\!!countc -\nofcolumns
+ \!!countb\nofcolumns
+ \else
+ \!!countc\zerocount
+ \fi
+ \advance\!!counta \plusone
+ \dostepwiserecurse\!!counta\!!countb\plusone
+ {\advance\!!widtha\OTRSETgetparameter\c!distance\recurselevel}%
+ \!!widthb\!!widtha
+ \advance\!!widthb -\!!countc\textwidth
+ \ifodd\realpageno \else % tricky, assumes that we keep there
+ \ifcase\!!countc\else
+ % nog niet ok voor enkel/doublesided
+ \advance\!!widtha \namedlayoutparameter\v!even\c!backspace
+ \advance\!!widtha \namedlayoutparameter\v!odd \c!backspace
+ \advance\!!widthb \namedlayoutparameter\v!even\c!backspace
+ \dorecurse\!!countc
+ {\advance\!!widtha\OTRSETgetparameter\c!distance\recurselevel}%
+ \fi
+ \fi}
+
+\def\columnsetspanhsize{\textwidth}
+
+\def\setcolumnsetspanhsize#1#2% x nx / uses counta/b
+ {\!!counta#1\!!countb#2\docalculatecolumnsetspan
+ \edef\columnsetspanhsize{\the\!!widtha}}
+
+\def\definecolumnsetspan
+ {\dodoubleempty\dodefinecolumnsetspan}
+
+\def\dodefinecolumnsetspan[#1][#2]%
+ {%\ifsecondargument
+ \defineframedtext
+ [cs:#1]
+ [\c!frame=\v!off,
+ \c!before=,
+ \c!after=,
+ \c!offset=\v!overlay,
+ \c!location=\v!left,
+ \c!linecorrection=\v!off,
+ \c!depthcorrection=\v!off,
+ \c!n=2,
+ \c!nlines=0,
+ \c!indenting=,
+ \c!indentnext=\v!yes,
+ \c!default=HERE,
+ \c!alternative=\v!a,
+ #2]%
+ %\else
+ % \definecolumnspan[][#1]%
+ }%\fi}
+
+\definecolumnsetspan[\s!default]
+
+\def\setupcolumnsetspan
+ {\dodoubleempty\dosetupcolumnsetspan}
+
+\def\dosetupcolumnsetspan[#1][#2]%
+ {\ifsecondargument
+ \setupframedtexts[cs:#1][#2]%
+ \else
+ \setupcolumnsetspan[\s!default][#1]%
+ \fi}
+
+\def\startcolumnsetspan
+ {\dotripleempty\dostartcolumnsetspan}
+
+%%%%%%%%%%%%%%%% TODO
+
+\def\dostartcolumnsetspan[#1][#2][#3]% [#3] gobbles space
+ {\endgraf % else rubish output if forgotten
+ \vskip \zeropoint % make sure otr is done, otherwise last line problems
+ \bgroup
+ \forgetall
+ \ifnum\columnsetlevel>\zerocount\else
+ % of course we needed a one-column fall back for tm
+ \columnsetspanhsize\hsize
+ \nofcolumns\plusone
+ \mofcolumns\plusone
+ \fi
+ \setupframedtexts[cs:#1]
+ [\c!width=\columnsetspanhsize,
+ \c!linecorrection=\v!off,
+ \c!depthcorrection=\v!off,
+ #2]%
+ % determine widths
+ \!!countc\framedtextparameter{cs:#1}\c!n
+ % \!!countd\numexpr(\nofcolumns-\mofcolumns+\plusone)%
+ \!!countd\nofcolumns
+ % n <= n of columns
+ \ifnum\!!countc>\!!countd \!!countc\!!countd \fi
+ \advance\!!countd -\mofcolumns
+ \advance\!!countd \plusone
+ % n <= n of available columns (alternative a)
+ \doif{\framedtextparameter{cs:#1}\c!alternative}\v!a
+ {\ifnum\!!countc>\!!countd \!!countc\!!countd \fi}%
+ % here it all starts
+ \setcolumnsetspanhsize\mofcolumns\!!countc % a/b used
+ \hsize\columnsetspanhsize
+ \setbox\scratchbox\vbox\bgroup
+ \dostartframedtext[cs:#1][\v!none]% geen nils placement
+ % spoils spacing : \vskip-\struttotal\par\verticalstrut\par
+ \ifnum\columnsetlevel>\zerocount
+ \framedtextparameter{cs:#1}\c!before
+ \fi
+ \def\stopcolumnsetspan{\dostopcolumnsetspan{#1}}}
+
+\def\dostopcolumnsetspan#1%
+ {\par
+ \verticalstrut
+ \kern-2\struttotal
+ \verticalstrut
+ \ifnum\columnsetlevel>\zerocount
+ \doifsomething{\framedtextparameter{cs:#1}\c!after}
+ {\framedtextparameter{cs:#1}\c!after
+ \kern\zeropoint}% otherwise blanks disappear, better be a switch
+ \else
+ \endgraf
+ \fi
+ \dostopframedtext
+ \egroup
+ \setbox\scratchbox\frozenhbox to \hsize
+ {\dontcomplain
+ \alignedline{\framedtextparameter{cs:#1}\c!location}\v!middle
+ {\lower\strutdepth\box\scratchbox}}%
+ \dp\scratchbox\zeropoint % else wrong snap insidefloat
+%
+% to be tested first (strange in grid mode)
+%
+% \setbox\scratchbox\frozenhbox to \hsize
+% {\dontcomplain
+% \chardef\alignstrutmode\zerocount
+% \alignedline{\framedtextparameter{cs:#1}\c!plaats}\v!midden
+% {\box\scratchbox}}%
+%
+ \ifinsidefloat
+ \box\scratchbox
+ \else\ifnum\columnsetlevel>\zerocount
+ % we only set \columnsetspacing when asked for, else bottom problems
+ % don't change this any more (test naw)
+ \chardef\columnslotspacing\framedtextparameter{cs:#1}\c!nlines\relax
+ % todo: nboven/onder & \chardef\columnslotlocation2
+ %\OTRSETstoreincolumnslotHERE\scratchbox
+ \edef\floatmethod{\framedtextparameter{cs:#1}\c!default}%
+ \@EA\uppercasestring\floatmethod\to\floatmethod
+ % todo : \v!here -> here enzovoorts
+ \OTRSETstoreincolumnslot\floatmethod\scratchbox
+ % watch out: no \dochecknextindentation{tag}
+ \checknextindentation[\framedtextparameter{cs:#1}\c!indentnext]%
+ \else
+ % of course we needed a one-column fall back for tm; brrr, the box has now too
+ % much height (try \ruledvbox); don't change this without testing techniek
+ \scratchdimen\ht\scratchbox
+ \advance\scratchdimen-\strutdp
+ \ht\scratchbox\scratchdimen
+ \framedtextparameter{cs:#1}\c!before
+ \snaptogrid\vbox{\box\scratchbox}%
+ \framedtextparameter{cs:#1}\c!after
+ \fi\fi
+ \egroup
+ \endgraf}
+
+% \startcolumnset[two]
+% \input tufte
+% \startcolumnsetspan[two][width=20cm,location=middle] \input tufte \stopcolumnsetspan
+% \startcolumnsetspan[two][default=btlr] \input tufte \stopcolumnsetspan
+% \input tufte \par
+% \input tufte \par
+% \startcolumnsetspan[two] \emptylines[5] \stopcolumnsetspan
+% \startcolumnsetspan[two] \input tufte \stopcolumnsetspan
+% \stopcolumnset
+
+% We need to set the \dimen globally since we are in the
+% OTR. Unfortunately this interferes with local settings,
+% although we may assume that they will not cross page
+% boundaries.
+
+\def\OTRSETcheckcontent
+ {\bgroup
+ \donefalse
+ \def\OTRSETcheckcontent##1%
+ {\setbox\scratchbox##1\recurselevel
+ \setbox\scratchbox\vbox{\unvbox\scratchbox}%
+ \ifdim\ht\scratchbox>\zeropoint\donetrue\fi}%
+ \dorecurse{\nofcolumns}
+ {\OTRSETcheckcontent\columngettextbox
+ \OTRSETcheckcontent\columngetfootbox
+ \OTRSETcheckcontent\columngettopbox
+ \OTRSETcheckcontent\columngetbotbox}%
+ \ifdone\egroup\donefalse\else\egroup\donetrue\fi}
+
+\def\OTRSETgetcolumntextheight#1% max - boven - top
+ {\scratchdimen=\OTRSETgetparameter\c!maxhoogte#1%
+ \advance\scratchdimen -\OTRSETgetparameter\c!bovenoffset#1%
+ \advance\scratchdimen -\ht\columntopbox#1%
+ \advance\scratchdimen -\getvalue{\??mc\number\mofcolumns-f}%
+ \advance\scratchdimen -\ht\columnbotbox#1} % not used
+
+\def\OTRSETgetcolumnnaturalheight#1% max - boven - top
+ {\setbox\scratchbox\vbox{\unvcopy\columntextbox#1}%
+ \scratchdimen\ht\scratchbox
+ \advance\scratchdimen \OTRSETgetparameter\c!bovenoffset#1%
+ \advance\scratchdimen \ht\columntopbox#1%
+ \advance\scratchdimen -\getvalue{\??mc\number\mofcolumns-f}%
+ \advance\scratchdimen \ht\columnbotbox#1} % not used
+
+\def\OTRSETdobalance% splitten in met en zonder footnotes
+ {\bgroup
+ \maxdeadcycles=1000
+ % collect content and notes
+ \bgroup
+ \OTRSEToutput
+ {\global\setbox1\vbox{\unvbox\normalpagebox}%
+ \global\setbox3\vbox{\unvbox\footins}}%
+ \verticalstrut\vskip-\struttotal % makes footnotes flush
+ \eject
+ \global\collectingcontentfalse
+ % check for footnotes only
+ \ifdim\ht1<\topskip % real dirty
+ \global\setbox1=\vbox{}
+ % fix height of first line
+ \ifdim\ht3>\!!zeropoint
+ \global\setbox3\vbox
+ {\setfootnotebodyfont
+ \kern-\strutht
+ \kern\topskip
+ \unvbox3}
+ \fi
+ % prepare trial box
+ \global\setbox5\vbox
+ {\ifdim\ht1>\zeropoint
+ \unvcopy1 \ifdim\ht3>\zeropoint \kern\skip\footins \fi
+ \fi
+ \ifdim\ht3>\zeropoint \unvcopy3 \fi}
+ \egroup
+ % erase old stuff
+ \columnerasetextboxes
+ \columnerasefootboxes
+ % prepare floats
+ \OTRSETdotopinsertions
+ \OTRSETdobotinsertions % not used can be removed
+ % calculate available space
+ \!!heighta\zeropoint % available total height
+ \dorecurse{\nofcolumns}
+ {\OTRSETgetcolumntextheight\recurselevel
+ \OTRSETcalculatelines\scratchdimen
+ \advance\!!heighta \scratchdimen}
+ % quick check
+ \ifdim\ht5>\!!heighta
+ % use normal routine
+ \columnerasetextboxes
+ \columnerasefootboxes
+ % TEMP, TODO, FORCE NEXT PASS !
+ \unvbox1
+ \unvbox3
+ \doglobal\addtocommalist{-\realfolio}\OTRSETbalancinglist
+ \donefalse
+ %\writestatus\m!columns{no balancing, text overflows height}%
+ \else\ifdim\ht5>\zeropoint \relax
+ % some text and/or notes
+ \donetrue
+ \else
+ \donefalse
+ \dorecurse\nofcolumns
+ {\ifdim\ht\columntopbox\recurselevel>\zeropoint \donetrue \fi}%
+ \ifdone
+ % no text and notes, but figures
+ \else
+ % no text, no notes, no figures
+ \doglobal\addtocommalist{-\realfolio}\OTRSETbalancinglist
+ \writestatus\m!columns{no balancing, nothing to be placed}%
+ \fi
+ \fi\fi
+ \ifdone
+ \ifdim\ht5>\zeropoint \relax
+ % balancing text and notes
+ %\writestatus\m!columns{text may fit, balancing}%
+ \newcounter\loopcounter
+ \newcounter\balancinglines
+ \doloop
+ {\increment\loopcounter\relax
+ % initialize
+ \columnerasetextboxes
+ \columnerasefootboxes
+ \setbox0=\copy5
+ \splittopskip\topskip
+ % pre-split loop and quality calculation
+ %\writestatus\m!columns{pass \loopcounter: correction -\balancinglines}
+ \dorecurse\nofcolumns
+ {\OTRSETgetcolumntextheight\recurselevel
+ \OTRSETcalculatelines\scratchdimen
+ \!!heightc\scratchdimen
+ \ifnum\recurselevel<\nofcolumns
+ \advance\!!heightc -\balancinglines\lineheight
+ \fi
+ \columnsettextbox\recurselevel\vsplit0 to \!!heightc}
+ % just one method
+ \OTRSETgetcolumnnaturalheight1 \dimen4\scratchdimen
+ \OTRSETgetcolumnnaturalheight\nofcolumns \dimen6\scratchdimen
+ %\writestatus\m!columns{first column: \the\dimen4}%
+ %\writestatus\m!columns{last column: \the\dimen6}%
+ \ifdim\dimen4=\dimen6
+ \donetrue % perfect balance
+ \else\ifdim\dimen4>\dimen6
+ \donefalse % not yet good enough
+ \increment\balancinglines % try again
+ \edef\balancingcount{\the\!!counta}
+ \else
+ \donetrue % worse balance
+ \ifnum\balancinglines>0 % take previous
+ \decrement\balancinglines
+ \fi
+ \fi\fi
+ % extra check
+ % \ifdim\ht0>\zeropoint\relax \donefalse \fi
+ % another check
+ \ifdone
+ %\writestatus\m!columns{balancing finished in pass \loopcounter}%
+ \else \ifnum\loopcounter>100 \donetrue
+ %\writestatus\m!columns{balancing aborted after pass \loopcounter}%
+ \else
+ %\writestatus\m!columns{balancing continued after pass \loopcounter}%
+ \fi \fi
+ % final balancing pass
+ \ifdone
+ \setbox0\copy1
+ \setbox2\copy3
+ \columnerasetextboxes
+ \columnerasefootboxes
+ \dorecurse\nofcolumns
+ {\OTRSETgetcolumntextheight\recurselevel
+ \OTRSETcalculatelines\scratchdimen
+ \!!heightc\scratchdimen
+ \ifnum\recurselevel<\nofcolumns
+ \advance\!!heightc -\balancinglines\lineheight
+ \fi
+ % split off text
+ \ifdim\ht0>\zeropoint
+ \columnsettextbox\recurselevel\vsplit0 to \!!heightc
+ \setbox4\vbox{\unvcopy\columntextbox\recurselevel}
+ \advance\!!heightc -\ht4
+ \ifdim\ht0>\zeropoint
+ \columnsettextbox\recurselevel\box4
+ \advance\!!heightc \skip\footins
+ \fi
+ \fi
+ % split off footnotes
+ \ifdim\ht0>\zeropoint\relax \else
+ \ifdim\ht2>\zeropoint\relax
+ \setbox4\vsplit2 to \!!heightc
+ \setbox\footins=\vbox{\unvbox4} % ugly and dirty trick
+ \ifdim\ht\columntextbox\recurselevel=\zeropoint\relax
+ \columnsettextbox\recurselevel\hbox
+ {\raise\strutdp\hbox % ugly but needed
+ {\setfootnotebodyfont % both these moves
+ \lower\strutdp\hbox{\placebottomnotes}}}
+ \else
+ \columnsetfootbox\recurselevel\hbox{\placebottomnotes}
+ \fi
+ \fi
+ \fi}
+ \exitloop
+ \fi}
+ \else
+ % no reason to balance floats
+ \fi
+ \fi
+ \doglobal\addtocommalist{\realfolio}\OTRSETbalancinglist
+ \OTRSETdoflush
+ \fi
+ \egroup}
+
+\protect \endinput
+
+% extreme examples (1)
+%
+% \setupfloats[numbering=nocheck]
+%
+% \definecolumnset [first] [n=2,start=0]
+% \definecolumnset [next] [n=2,start=3]
+%
+% \setuptexttexts[\vbox to \textheight{\topskipcorrection \hsize\makeupwidth left \hfill right\vfill}]
+%
+% \setuphead[chapter][text=empty]
+%
+% \starttext
+%
+% \startcolumnset[first,next]
+% \placefigure[btrl]{}{}
+% \placefigure[tblr]{}{}
+% \chapter{thuan} \dorecurse{25}{\recurselevel: \input thuan \endgraf}
+% \stopcolumnset
+%
+% \startcolumnset[first,next]
+% \chapter{thuan} \dorecurse{25}{\input thuan \endgraf\placefigure{}{}}
+% \stopcolumnset
+
+\unprotect
+
+% only in columnsets
+
+% \def\cornerfigure
+% {\dotripleempty\docornerfigure}
+%
+% \def\docornerfigure[#1][#2][#3]% [layer] [location] [settings]
+% {\bgroup
+% \dowithnextbox
+% {\!!doneafalse
+% \!!donebfalse
+% \processallactionsinset
+% [\v!left,\v!bottom,#2]
+% [ \v!left=>\!!doneatrue ,
+% \v!right=>\!!doneafalse,
+% \v!top=>\!!donebtrue ,
+% \v!bottom=>\!!donebfalse]%
+% \!!widtha\nextboxwd
+% \if!!donea
+% % unchecked
+% \advance\!!widtha-\backspace
+% \else
+% % unchecked
+% \advance\!!widtha-\backspace
+% \fi
+% \!!widtha\textwidth % could be an option
+% \!!heighta\nextboxht
+% % zou een macro moeten zijn \getnoflayoutlines
+% \ifnum\layoutparameter\c!lines=\zerocount
+% \getnoflines\textheight
+% \else
+% \noflines\layoutparameter\c!lines
+% \fi
+% %
+% \advance\noflines \plusone % wordt default, instelbaar
+% \!!heightb\noflines\lineheight\relax
+% \if!!doneb % boven
+% % unchecked
+% \advance\!!heighta-\topspace
+% \advance\!!heighta-\headerheight
+% \advance\!!heighta-\headerdistance
+% \else % onder
+% % checked
+% \advance\!!heighta-\paperheight
+% \advance\!!heighta+\!!heightb
+% \advance\!!heighta+\topspace
+% \advance\!!heighta+\headerheight
+% \advance\!!heighta+\headerdistance
+% \advance\!!heighta-\footerdistance
+% \advance\!!heighta-\footerheight
+% \fi
+% \getnoflines\!!heighta
+% \!!heighta\noflines\lineheight\relax
+% \def\docornerfigure[####1]%
+% {\expanded{\plaatsfiguur[####1,\v!none]{}
+% {\noexpand\phantombox[\c!width=\the\!!widtha,\c!height=\the\!!heighta]}}}%
+% \if!!donea
+% \if!!doneb % links boven / rb
+% \setlayer[#1]
+% [\c!corner={\v!left,\v!top},\c!location=rb,#3]
+% {\flushnextbox}%
+% \docornerfigure[tblr]%
+% \else % links onder / rt
+% \setlayer[#1]
+% [\c!corner={\v!left,\v!bottom},\c!location=rt,#3]
+% {\flushnextbox}%
+% \docornerfigure[btlr]%
+% \fi
+% \else
+% \if!!doneb % rechts boven / lt
+% \setlayer[#1]
+% [\c!corner={\v!right,\v!top},\c!location=lb,#3]
+% {\flushnextbox}%
+% \docornerfigure[tbrl]%
+% \else % rechts onder / lb
+% \setlayer[#1]
+% [\c!corner={\v!right,\v!bottom},\c!location=lt,#3]
+% {\flushnextbox}%
+% \docornerfigure[btrl]%
+% \fi
+% \fi
+% \egroup}
+% \vbox}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-20 12:25:23 +0000