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+%D \module
+%D [ file=core-mis,
+%D version=1998.01.29,
+%D title=\CONTEXT\ Core Macros,
+%D subtitle=Miscelaneous,
+%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 Core Macros / Misc Commands}
+
+% todo: kleur in legenda + letter
+
+% %D You would not expect the next macro in \CONTEXT,
+% %D wouldn't you? It's there to warn \LATEX\ users that
+% %D something is wrong.
+% %D
+% %D Obsolete now:
+% %
+% % \def\documentstyle{\showmessage\m!systems3\empty\stoptekst}
+% %
+% % \let\documentclass=\documentstyle
+% %D \macros
+% %D {simplifiedcommands, simplifycommands}
+% %D
+% %D I first needed this simplification in bookmarks. Users can
+% %D add their own if needed.
+
+\unprotect
+
+%D Sometimes (for instance in bookmarks) we need to simplify macro
+%D behaviour, so here is the hook.
+
+\ifx\simplifiedcommands\undefined \newtoks\simplifiedcommands \fi
+
+\def\simplifycommands{\the\simplifiedcommands}
+
+%D A possibly growing list:
+
+%appendtoks \def\executesynonym#1#2#3#4{#3}\to\simplifiedcommands
+%appendtoks \def\executesort#1#2#3{#3}\to\simplifiedcommands
+
+\appendtoks \def\ { }\to\simplifiedcommands
+\appendtoks \def\type#1{\letterbackslash\strippedcsname#1}\to\simplifiedcommands
+\appendtoks \def\tex#1{\letterbackslash#1}\to\simplifiedcommands
+\appendtoks \def\TeX{TeX}\to\simplifiedcommands
+\appendtoks \def\ConTeXt{ConTeXt}\to\simplifiedcommands
+\appendtoks \def\MetaPost{MetaPost}\to\simplifiedcommands
+\appendtoks \def\MetaFont{MetaFont}\to\simplifiedcommands
+\appendtoks \def\MetaFun{MetaFun}\to\simplifiedcommands
+%appendtoks \def||{-}\to\simplifiedcommands
+\appendtoks \def|#1|{\ifx#1\empty\empty-\else#1\fi}\to\simplifiedcommands
+
+\appendtoks\let\buildtextaccent\secondoftwoarguments\to\simplifiedcommands
+
+% THIS WAS MAIN-002.TEX
+
+%\def\checkinterlineskip
+% {\ifvmode
+% \ifdim\lastskip>\zeropoint
+% \nointerlineskip
+% \else\ifdim\lastkern>\zeropoint
+% \nointerlineskip
+% \fi\fi
+% \fi}
+
+\def\horitems#1#2% #1=breedte #2=commandos
+ {\scratchdimen#1%
+ \divide\scratchdimen \nofitems
+ \!!counta\zerocount
+ \def\docommand##1%
+ {\advance\!!counta \plusone
+ \processaction
+ [\@@isalign]
+ [ \v!left=>\hbox to \scratchdimen{\strut##1\hss},
+ \v!right=>\hbox to \scratchdimen{\hss\strut##1},
+ \v!middle=>\hbox to \scratchdimen{\hss\strut##1\hss},
+ \v!margin=>\ifnum\!!counta=\plusone\hss\else\hfill\fi
+ \strut##1%
+ \ifnum\!!counta=\nofitems\hss\else\hfill\fi,
+ \s!default=>\hbox to \scratchdimen{\hss\strut##1\hss}, % midden
+ \s!unknown=>\hbox to \scratchdimen{\strut##1\hss}]}% % links
+ \hbox to #1{\hss#2\hss}}
+
+\def\veritems#1#2% #1=breedte #2=commandos
+ {\scratchdimen#1%
+ \def\docommand##1%
+ {\ifdim\scratchdimen<\zeropoint % the - was a signal
+ \hbox to -\scratchdimen{\hss\strut##1}%
+ \else\ifdim\scratchdimen>\zeropoint
+ \hbox to \scratchdimen{\strut##1\hss}%
+ \else
+ \hbox{\strut##1}%
+ \fi\fi}%
+ \vbox{#2}}
+
+\def\dosetupitems[#1]%
+ {\getparameters[\??is][#1]%
+ \doif\@@iswidth\v!unknown
+ {\def\@@iswidth{\hsize}}%
+ \doifconversiondefinedelse\@@issymbol
+ {\def\doitembullet##1{\convertnumber{\@@issymbol}{##1}}}
+ {\doifsymboldefinedelse\@@issymbol
+ {\def\doitembullet##1{\symbol[\@@issymbol]}}{}}}
+
+\def\makeitemsandbullets#1%
+ {\doifelse\@@isn\v!unknown
+ {\getcommalistsize[#1]%
+ \edef\nofitems{\commalistsize}}
+ {\edef\nofitems{\@@isn}}%
+ \setbox0\hbox
+ {\doitems \@@iswidth
+ {\processcommalist[#1]\docommand}}%
+ \setbox2\hbox
+ {\doitems \@@isbulletbreedte
+ {\dorecurse\nofitems
+ {\docommand{\strut\doitembullet\recurselevel}}}}}
+
+\def\dostartitems#1#2#3%
+ {\let\doitems#2%
+ \def\@@isbulletbreedte{#3}%
+ \makeitemsandbullets{#1}%
+ \@@isbefore}
+
+\def\dostopitems
+ {\@@isafter
+ \egroup}
+
+\setvalue{doitems\v!top}#1%
+ {\dostartitems{#1}\horitems\@@iswidth
+ \noindent\vbox
+ {\forgetall
+ \doifsomething\@@issymbol
+ {\doifnot\@@issymbol\v!none
+ {\box2
+ \@@isinbetween
+ \nointerlineskip}}%
+ \box0}%
+ \dostopitems}
+
+\setvalue{doitems\v!bottom}#1%
+ {\dostartitems{#1}\horitems\@@iswidth
+ \noindent\vbox
+ {\forgetall
+ \box0
+ \doifsomething\@@issymbol
+ {\@@isinbetween
+ \nointerlineskip
+ \box2}}%
+ \dostopitems}
+
+\setvalue{doitems\v!inmargin}#1%
+ {\dostartitems{#1}\veritems{-1.5em}% - is a signal
+ \noindent\hbox{\llap{\box2\hskip\leftmargindistance}\box0}%
+ \dostopitems}
+
+\setvalue{doitems\v!left}#1%
+ {\advance\hsize -1.5em%
+ \dostartitems{#1}\veritems{1.5em}%
+ \noindent\hbox{\box2\box0}%
+ \dostopitems}
+
+\setvalue{doitems\v!right}#1%
+ {\dostartitems{#1}\veritems{0em}%
+ \noindent\hbox{\box0\hskip-\wd2\box2}%
+ \dostopitems}
+
+\def\setupitems
+ {\dosingleargument\dosetupitems}
+
+\def\complexitems[#1]%
+ {\bgroup
+ \setupitems[#1]%
+ \parindent\zeropoint
+ \setlocalhsize
+ \hsize\localhsize
+ \dontcomplain
+ %\doifundefined{doitems\@@islocation}%
+ % {\let\@@islocation\v!left}%
+ %\getvalue{doitems\@@islocation}}
+ \executeifdefined{doitems\@@islocation}{\let\@@islocation\v!left}}
+
+\definecomplexorsimpleempty\items
+
+\setupitems
+ [\c!location=\v!left,
+ \c!symbol=5,
+ \c!width=\hsize,
+ \c!align=\v!middle,
+ \c!n=\v!unknown,
+ \c!before=\blank,
+ \c!inbetween={\blank[\v!medium]},
+ \c!after=\blank]
+
+% \definieerplaats[naam][instellingen]
+% \stelplaatsin[naam][instellingen]
+% \plaats<naam>[[instellingen]]
+%
+% - still undocumented and also not in setupb yet
+% - kan ook intern/direct (scheelt duplicatie), zie \framedtext
+
+\def\dodefineplacement[#1][#2]%
+ {\getparameters
+ [\??pl#1]
+ [\c!left=\hss,
+ \c!right=\hss,
+ \c!linecorrection=\v!off,
+ \c!depthcorrection=\v!off,
+ \c!margin=\v!standard,
+ \c!grid=\v!middle,
+ %\c!before=,
+ %\c!after=,
+ #2]%
+ \setvalue{\e!place#1}{\doplacement[\??pl#1]}}
+
+\def\defineplacement
+ {\dodoubleempty\dodefineplacement}
+
+\def\setupplacement
+ {\dodoubleempty\dosetupplacement}
+
+\def\dosetupplacement[#1]%
+ {\dodoubleempty\getparameters[\??pl#1]}
+
+\def\doplacement
+ {\dodoubleempty\dodoplacement}
+
+\def\dodoplacement[#1][#2]% correctie moet mooier
+ {\bgroup
+ \dowithnextboxcontent
+ {\forgetall}
+ {\setlocalhsize
+ \getparameters[#1][#2]%
+ \getvalue{#1\c!before}%
+ \begingroup
+ \disableparpositions
+ \setbox\nextbox\hbox to \localhsize
+ {\getvalue{#1\c!left}%
+ \flushnextbox
+ \getvalue{#1\c!right}}%
+ \ifinsidefloat \else
+ \addlocalbackgroundtobox\nextbox
+ \fi
+ \ifgridsnapping
+ \doifundefined{#1\c!grid}{\letvalue{#1\c!grid}\v!middle}%
+ % unchecked
+ \doifinset{\getvalue{#1\c!margin}}{\v!standard,\v!yes}\noindent
+ \snaptogrid[\getvalue{#1\c!grid}]\hbox{\flushnextbox}%
+ \else
+ \doifvalue{#1\c!linecorrection}\v!on \startbaselinecorrection
+ \doifinset{\getvalue{#1\c!margin}}{\v!standard,\v!yes}\noindent
+ \flushnextbox
+ \doifvalue{#1\c!depthcorrection}\v!on\baselinecorrection
+ \doifvalue{#1\c!linecorrection }\v!on\stopbaselinecorrection
+ \fi
+ \endgroup
+ \getvalue{#1\c!after}%
+ \egroup}
+ \vbox}
+
+% Te zijner tijd [plaats=boven,onder,midden] implementeren,
+% in dat geval moet eerst de maximale hoogte worden bepaald.
+%
+% Overigens kan een en ander mooier met \halign.
+
+% there is quite some historic balast in this mechanism, the next variant
+% is a first cleanup
+
+\let\currentparagraph\empty
+
+\newcount\alcounter \newcount\alnsize \newdimen\alhsize
+
+\def\paragraphparameter#1% \checkedparameter\??al\currentparagraph#1
+ {\executeifdefined{\??al\currentparagraph#1}{\executeifdefined{\??al#1}\empty}}
+
+\def\paragraphcellmeter#1#2% \checkedparameter\??al\currentparagraph#1
+ {\executeifdefined{\??al\currentparagraph\number#1#2}{\paragraphparameter{#2}}}
+
+\def\dodefineparagraphs[#1][#2]%
+ {\edef\currentparagraph{#1}%
+ \setvalue{\s!do\s!next\currentparagraph}%
+ {\def\\{\getvalue\currentparagraph}}%
+ \setvalue\currentparagraph
+ {\getvalue{\s!do\s!next#1}%
+ \dostartparagraphs{#1}}%
+ \setvalue{\e!next\currentparagraph}%
+ {\getvalue{#1}}%
+ \setvalue{\e!start\currentparagraph}%
+ {\bgroup
+ \edef\currentparagraph{#1}%
+ \letvalue{\s!do\s!next\currentparagraph}\empty
+ \setvalue{\e!stop\currentparagraph}{\getvalue\currentparagraph\egroup}%
+ \getvalue\currentparagraph}%
+ \getparameters[\??al\currentparagraph]%
+ [%\c!n=3,
+ %\c!before=\blank,
+ %\c!after=\blank,
+ %\c!distance=1em,
+ %\c!height=\v!fit,
+ %\c!rule=\v!off,
+ %\c!command=,
+ %\c!align=,
+ %\c!tolerance=\v!tolerant,
+ %\c!rulethickness=\linewidth,
+ %\c!rulecolor=,
+ %\c!style=,
+ %\c!color=,
+ %\c!top=,
+ %\c!top=\vss,
+ %\c!bottom=\vfill,
+ #2]%
+ \setvalue{\e!setup#1\e!endsetup}%
+ {\setupparagraphs[#1]}%
+ \dorecurse
+ {\paragraphparameter\c!n}
+ {\setupparagraphs
+ [\currentparagraph]
+ [\recurselevel]
+ [\c!width=,
+ %\c!bottom=\paragraphparameter\c!bottom,
+ %\c!top=\paragraphparameter\c!top,
+ %\c!height=\paragraphparameter\c!height,
+ %\c!rule=\paragraphparameter\c!rule,
+ %\c!rulethickness=\paragraphparameter\c!rulethickness,
+ %\c!rulecolor=\paragraphparameter\c!rulecolor,
+ %\c!align=\paragraphparameter\c!align,
+ %\c!tolerance=\paragraphparameter\c!tolerance, % obsolete
+ %\c!distance=\paragraphparameter\c!distance,
+ \c!style=\paragraphparameter\c!style,
+ \c!color=\paragraphparameter\c!color]}%
+ \setupparagraphs[\currentparagraph][1][\c!distance=\zeropoint]}
+
+\def\defineparagraphs
+ {\dodoubleargument\dodefineparagraphs}
+
+\def\dosetupparagraphs[#1][#2][#3]%
+ {\edef\currentparagraph{#1}%
+ \ifsecondargument
+ \doifelse{#2}\v!each
+ {\dorecurse
+ {\paragraphparameter\c!n}
+ {\getparameters[\??al\currentparagraph\recurselevel][#3]}}
+ {\doifelsenothing{#3}
+ {\getparameters[\??al\currentparagraph][#2]}
+ {\def\docommand##1{\getparameters[\??al\currentparagraph##1][#3]}%
+ \processcommalist[#2]\docommand}}%
+ \else
+ \getparameters[\??al][#1]%
+ \fi}
+
+\def\setupparagraphs
+ {\dotripleempty\dosetupparagraphs}
+
+\setupparagraphs
+ [\c!n=3,
+ \c!before=\blank,
+ \c!after=\blank,
+ \c!distance=1em,
+ \c!height=\v!fit,
+ \c!rule=\v!off,
+ \c!command=,
+ \c!align=,
+ \c!tolerance=\v!tolerant, % obsolete
+ \c!rulethickness=\linewidth,
+ \c!rulecolor=,
+ \c!style=,
+ \c!color=,
+ \c!top=,
+ \c!top=\vss,
+ \c!bottom=\vfill]
+
+\def\doparagraphrule
+ {\doifelse{\paragraphcellmeter\alcounter\c!rule}\v!on
+ {\linewidth\paragraphcellmeter\alcounter\c!rulethickness
+ \scratchdimen\paragraphcellmeter\alcounter\c!distance
+ \advance\scratchdimen-\linewidth
+ \divide\scratchdimen \plustwo
+ \hskip\scratchdimen
+ \color[\paragraphcellmeter\alcounter\c!rulecolor]{\vrule\!!width\linewidth}%
+ \hskip\scratchdimen}
+ {\hskip\paragraphcellmeter\alcounter\c!distance}}
+
+\def\dostartparagraph
+ {\doifelsenothing{\paragraphcellmeter\alcounter\c!width}
+ {\!!widtha\alhsize
+ \divide\!!widtha \alnsize}
+ {\!!widtha\paragraphcellmeter\alcounter\c!width}%
+ \dostartattributes{\??al\currentparagraph\number\alcounter}\c!style\c!color\empty
+ \doifelse{\paragraphcellmeter\alcounter\c!height}\v!fit
+ {\setbox\scratchbox\vtop}
+ {\setbox\scratchbox\vtop to \paragraphcellmeter\alcounter\c!height}%
+ \bgroup
+ \blank[\v!disable]%
+ \forgetall
+ \paragraphcellmeter\alcounter\c!top
+ \paragraphparameter\c!inner
+ \hsize\!!widtha % setting \wd afterwards removed
+ \paragraphcellmeter\alcounter\c!inner % twice
+ \expanded{\setupalign [\paragraphcellmeter\alcounter\c!align ]}% {normal,verytolerant,stretch}
+ \expanded{\setuptolerance[\paragraphcellmeter\alcounter\c!tolerance]}% obsolete
+ \ignorespaces
+ \endgraf
+ \ignorespaces
+ %
+ % Nadeel van de onderstaande constructie is dat \everypar
+ % binnen een groep kan staan en zo steeds \begstruts
+ % worden geplaatst. Mooi is anders dus moet het anders!
+ %
+ % Hier is \Everypar niet nodig.
+ %
+ \everypar{\begstrut\everypar\emptytoks}%
+ %
+ \nospace % remove + ignore
+ \paragraphcellmeter\alcounter\c!command}
+
+\def\dostopparagraph
+ {\ifvmode
+ \removelastskip
+ \else
+ \unskip\endstrut\endgraf
+ \fi
+ \paragraphcellmeter\alcounter\c!bottom
+ \egroup
+ \ifdim\wd\scratchbox=\zeropoint % no data
+ \wd\scratchbox\!!widtha
+ \fi
+ \box\scratchbox
+ \dostopattributes
+ \ifnum\alcounter<\paragraphparameter\c!n\relax
+ \@EA\doparagraphcell
+ \else
+ \@EA\dostopparagraphs
+ \fi}
+
+\def\doparagraphcell
+ {\global\advance\alcounter \plusone
+ \doifelsenothing{\paragraphcellmeter\alcounter\c!distance}
+ {\ifnum\alcounter=\plusone\else
+ \hskip\paragraphparameter\c!distance
+ \fi}
+ {\ifnum\alcounter=\plusone
+ \hskip\paragraphcellmeter\alcounter\c!distance
+ \else
+ \doparagraphrule
+ \fi}%
+ \letvalue\currentparagraph\dostopparagraph
+ \dostartparagraph}
+
+\def\dostartparagraphs#1%
+ {\bgroup
+ \edef\currentparagraph{#1}%
+ \global\alcounter\zerocount
+ \parindent\zeropoint
+ \setlocalhsize
+ \alhsize\localhsize
+ \alnsize\paragraphparameter\c!n\relax
+ \dorecurse \alnsize
+ {\doifelsenothing{\paragraphcellmeter\recurselevel\c!distance}
+ {\ifnum\recurselevel=\plusone\else
+ \global\advance\alhsize -\paragraphparameter\c!distance
+ \fi}
+ {\global\advance\alhsize -\paragraphcellmeter\recurselevel\c!distance}%
+ \doifsomething{\paragraphcellmeter\recurselevel\c!width}
+ {\global\advance\alnsize \minusone
+ \global\advance\alhsize -\paragraphcellmeter\recurselevel\c!width}}%
+ %whitespace % gaat fout bij \framed
+ \paragraphparameter\c!before
+ \leavevmode % gaat wel goed bij \framed, brrr
+ \setbox\scratchbox\vbox\bgroup\hbox\bgroup\doparagraphcell}
+
+\def\dostopparagraphs
+ {\egroup
+ \egroup
+ \iftrue
+ \hbox{\raise\strutheight\box\scratchbox}% new
+ \else
+ \box\scratchbox % old
+ \fi
+ \par
+ \paragraphparameter\c!after
+ \egroup}
+
+\def\dosetuptab[#1]%
+ {\getparameters[\??ta]
+ [\c!headstyle=\v!normal,
+ \c!headcolor=,
+ \c!style=\v!normal,
+ \c!color=,
+ \c!width=\v!broad,
+ \c!sample={\hskip4em},
+ \c!before=,
+ \c!after=,
+ #1]%
+ \definedescription
+ [tab]
+ [\c!headstyle=\@@taheadstyle,
+ \c!headcolor=\@@tacolor,
+ \c!sample=\@@tasample,
+ \c!width=\@@tawidth,
+ \c!before=\@@tabefore,
+ \c!after=\@@taafter]}
+
+\def\setuptab
+ {\dosingleargument\dosetuptab}
+
+\setuptab
+ [\c!location=\v!left]
+
+% The following macro's are derived from PPCHTEX and
+% therefore take some LaTeX font-switching into account.
+
+\newif\ifloweredsubscripts
+
+% Due to some upward incompatibality of LaTeX to LaTeX2.09
+% and/or LaTeX2e we had to force \@@chemieletter. Otherwise
+% some weird \nullfont error comes up.
+
+\doifundefined{@@chemieletter}{\def\@@chemieletter{\rm}}
+
+\def\beginlatexmathmodehack
+ {\ifmmode
+ \let\endlatexmathmodehack\relax
+ \else
+ \def\endlatexmathmodehack{$}$\@@chemieletter
+ \fi}
+
+\def\setsubscripts
+ {\beginlatexmathmodehack
+ \def\dosetsubscript##1##2##3%
+ {\dimen0=##3\fontexheight##2%
+ \setxvalue{@@\string##1\string##2}{\the##1##2\relax}%
+ ##1##2=\dimen0\relax}%
+ \def\dodosetsubscript##1##2%
+ {\dosetsubscript{##1}{\textfont2}{##2}%
+ \dosetsubscript{##1}{\scriptfont2}{##2}%
+ \dosetsubscript{##1}{\scriptscriptfont2}{##2}}%
+ %dodosetsubscript\mathsupnormal {?}%
+ \dodosetsubscript\mathsubnormal {.7}%
+ \dodosetsubscript\mathsubcombined{.7}%
+ \global\loweredsubscriptstrue
+ \endlatexmathmodehack}
+
+\def\resetsubscripts
+ {\ifloweredsubscripts
+ \beginlatexmathmodehack
+ \def\doresetsubscript##1##2%
+ {\dimen0=\getvalue{@@\string##1\string##2}\relax
+ ##1##2=\dimen0}%
+ \def\dodoresetsubscript##1%
+ {\doresetsubscript{##1}{\textfont2}%
+ \doresetsubscript{##1}{\scriptfont2}%
+ \doresetsubscript{##1}{\scriptscriptfont2}}%
+ %dodoresetsubscript\mathsupnormal
+ \dodoresetsubscript\mathsubnormal
+ \dodoresetsubscript\mathsubcombined
+ \global\loweredsubscriptsfalse
+ \endlatexmathmodehack
+ \fi}
+
+\let\beginlatexmathmodehack = \relax
+\let\endlatexmathmodehack = \relax
+
+\def\chem#1#2#3%
+ {\bgroup
+ \setsubscripts
+ \mathematics{\hbox{#1}_{#2}^{#3}}%
+ \resetsubscripts
+ \egroup}
+
+\unexpanded\def\celsius #1{#1\mathematics{^\circ}C}
+\unexpanded\def\inch {\mathematics{\prime\prime}} % was: \hbox{\rm\char125\relax}
+\unexpanded\def\fraction#1#2{\mathematics{#1\over#2}}
+
+% very dutch
+
+\unexpanded\def\graden {\mathematics{^\circ}}
+
+\def\bedragprefix {\euro\normalfixedspace}
+\def\bedragsuffix {}
+\def\bedragempty {\euro}
+
+\unexpanded\def\bedrag#1%
+ {\strut\hbox\bgroup
+ \let\normalfixedspace\nonbreakablespace
+ \doifelsenothing{#1}
+ {\bedragempty}
+ {\bedragprefix\digits{#1}\bedragsuffix}%
+ \egroup}
+
+% \definieeralineas[test][n=3]
+%
+% \stelalineasin[test][3][breedte=4cm,uitlijnen=links]
+%
+% \startopelkaar
+% \test hans \\ ton \\ \bedrag{1.000,--} \\
+% \test hans \\ ton \\ \bedrag{~.~~1,--} \\
+% \test hans \\ ton \\ \bedrag{~.~~1,~~} \\
+% \test hans \\ ton \\ \bedrag{~.100,--} \\
+% \test hans \\ ton \\ \subtot{1.000,--} \\
+% \test hans \\ ton \\ \bedrag{1.000,--} \\
+% \test hans \\ ton \\ \bedrag{1.000,--} \\
+% \test hans \\ ton \\ \totaal{1.000,--} \\
+% \test hans \\ ton \\ \bedrag{nihil,--} \\
+% \test hans \\ ton \\ \totaal{nihil,--} \\
+% \test hans \\ ton \\ \subtot{nihil,--} \\
+% \stopopelkaar
+
+\def\periodswidth {.5em}
+\def\periodsdefault{3} % was 5, but now it's like \unknown
+
+\unexpanded\def\periods
+ {\dosingleempty\doperiods}
+
+\def\doperiods[#1]%
+ {\dontleavehmode
+ \begingroup
+ \scratchdimen\periodswidth
+ \hbox to \iffirstargument#1\else\periodsdefault\fi \scratchdimen
+ {\leaders\hbox to \scratchdimen{\hss.\hss}\hss}%
+ \endgroup}
+
+\unexpanded\def\unknown
+ {\periods\relax} % relax prevents lookahead for []
+
+% compatibility macros
+
+\def\doorsnede
+ {\hbox{\rlap/$\circ$} }
+
+\unexpanded\def\ongeveer
+ {\mathematics\pm}
+
+\chardef\boundarycharactermode\plusone
+
+\def\midboundarycharacter#1#2%
+ {\ifcase\boundarycharactermode
+ \or
+ %\nobreak
+ \hskip\hspaceamount\currentlanguage{#2}%
+ \languageparameter#1%
+ %\nobreak
+ \hskip\hspaceamount\currentlanguage{#2}%
+ \or
+ \languageparameter#1%
+ \fi
+ \chardef\boundarycharactermode\plusone}
+
+\def\leftboundarycharacter#1#2%
+ {\ifcase\boundarycharactermode
+ \or
+ \languageparameter#1%
+ \nobreak
+ \hskip\hspaceamount\currentlanguage{#2}%
+ \or
+ \languageparameter#1%
+ \fi
+ \chardef\boundarycharactermode\plusone}
+
+\def\rightboundarycharacter#1#2%
+ {\ifcase\boundarycharactermode
+ \or
+ \prewordbreak %\nobreak
+ \hskip\hspaceamount\currentlanguage{#2}%
+ \languageparameter#1%
+ \or
+ \languageparameter#1%
+ \fi
+ \chardef\boundarycharactermode\plusone}
+
+% actually this is pretty old, but temporary moved here
+%
+% obsolete:
+
+\def\setuphyphenmark
+ {\dodoubleargument\getparameters[\??kp]}
+
+\def\setuphyphenmark[#1]% sign=normal|wide
+ {\dodoubleargument\getparameters[\??kp][#1]%
+ \doifinsetelse\@@kpsign {\v!normal}
+ {\let\textmodehyphen\normalhyphen \let\textmodehyphendiscretionary\normalhyphendiscretionary}
+ {\let\textmodehyphen\composedhyphen\let\textmodehyphendiscretionary\composedhyphendiscretionary}}
+
+\setuphyphenmark[\c!sign=\v!wide]
+% % \setuphyphenmark[\c!sign=\v!normal]
+
+\definesymbol[\c!lefthyphen] [\languageparameter\c!lefthyphen]
+\definesymbol[\c!righthyphen] [\languageparameter\c!righthyphen]
+\definesymbol[\c!hyphen] [\languageparameter\c!hyphen]
+
+\def\normalhyphen
+ {\hbox{\directsymbol\empty\c!hyphen}}
+
+\def\composedhyphen
+ {\hbox{\directsymbol\empty\c!compoundhyphen}}
+
+\def\normalhyphendiscretionary
+ {\discretionary
+ {\hbox{\directsymbol\empty\c!lefthyphen}}
+ {\hbox{\directsymbol\empty\c!righthyphen}}
+ {\hbox{\directsymbol\empty\c!hyphen}}}
+
+\def\composedhyphendiscretionary
+ {\discretionary
+ {\hbox{\directsymbol\empty\c!leftcompoundhyphen}}
+ {\hbox{\directsymbol\empty\c!rightcompoundhyphen}}
+ {\hbox{\directsymbol\empty\c!compoundhyphen}}}
+
+\let\textmodehyphen \composedhyphen
+\let\textmodehyphendiscretionary\composedhyphendiscretionary
+
+\definesymbol[\c!leftcompoundhyphen] [\languageparameter\c!leftcompoundhyphen]
+\definesymbol[\c!rightcompoundhyphen] [\languageparameter\c!rightcompoundhyphen]
+\definesymbol[\c!compoundhyphen] [\languageparameter\c!compoundhyphen]
+
+\definehspace [sentence] [\zeropoint]
+\definehspace [intersentence] [.250em]
+
+\definesymbol
+ [\c!midsentence]
+ [\midboundarycharacter\c!midsentence{sentence}]
+
+\definesymbol
+ [\c!leftsentence]
+ [\leftboundarycharacter\c!leftsentence{sentence}]
+
+\definesymbol
+ [\c!rightsentence]
+ [\rightboundarycharacter\c!rightsentence{sentence}]
+
+\definesymbol
+ [\c!leftsubsentence]
+ [\leftboundarycharacter\c!leftsubsentence{sentence}]
+
+\definesymbol
+ [\c!rightsubsentence]
+ [\rightboundarycharacter\c!rightsubsentence{sentence}]
+
+\newsignal \subsentencesignal
+\newcounter\subsentencelevel
+
+\let\beforesubsentence\donothing
+\let\aftersubsentence \donothing
+
+% todo: make this language option
+%
+% \def\beforesubsentence{\removeunwantedspaces}
+% \def\aftersubsentence {\ignorespaces}
+
+\def\midsentence
+ {\symbol[\c!midsentence]}
+
+\def\beginofsubsentence
+ {\beforesubsentence
+ \ifdim\lastkern=\subsentencesignal
+ \unskip
+ \kern\hspaceamount\currentlanguage{intersentence}%
+ \fi
+ \doglobal\increment\subsentencelevel
+ \ifnum\subsentencelevel=\plusone
+ \dontleavehmode % was \leaveoutervmode
+ \fi
+ \symbol[\ifodd\subsentencelevel\c!leftsentence\else\c!leftsubsentence\fi]%
+ }% \ignorespaces}
+
+\def\endofsubsentence % relax prevents space gobbling
+ {\symbol[\ifodd\subsentencelevel\c!rightsentence\else\c!rightsubsentence\fi]%
+ \doglobal\decrement\subsentencelevel
+ \unskip
+ \kern\subsentencesignal\relax
+ \aftersubsentence}
+
+\def\beginofsubsentencespacing % relax prevents space gobbling
+ {\kern\subsentencesignal\relax}% \ignorespaces}
+
+\def\endofsubsentencespacing
+ {\ifdim\lastkern=\subsentencesignal
+ \unskip
+ \hskip\hspaceamount\currentlanguage{intersentence}%
+ % no good, actually language dependent:
+% \ignorespaces
+ \else
+ \unskip
+ \fi}
+
+%D \startbuffer
+%D test |<|test |<|test|>| test|>| test \par
+%D test|<|test|<|test|>|test|>|test \par
+%D test |<||<|test|>||>| test \par
+%D test \directdiscretionary{<}test\directdiscretionary{>} test \par
+%D \stopbuffer
+%D
+%D \typebuffer
+%D \getbuffer
+
+\def\startsubsentence{\beginofsubsentence \prewordbreak\beginofsubsentencespacing}
+\def\stopsubsentence {\endofsubsentencespacing\prewordbreak\endofsubsentence}
+
+%D \defineXMLenvironment [subsentence]
+%D {|<|}
+%D {|>|}
+%D \defineXMLenvironment [subsentence]
+%D {\directdiscretionary{<}}
+%D {\directdiscretionary{>}}
+%D \defineXMLenvironment [subsentence]
+%D {\startsubsentence}
+%D {\stopsubsentence}
+%D
+%D \startbuffer
+%D test <subsentence>test</subsentence> test
+%D \stopbuffer
+%D
+%D \typebuffer
+%D \processXMLbuffer
+
+\enableactivediscretionaries
+
+\definehspace [quotation] [\zeropoint]
+\definehspace [interquotation] [.125em]
+
+%definehspace [quote] [\zeropoint]
+%definehspace [speech] [\zeropoint]
+
+\definehspace [quote] [\hspaceamount\currentlanguage{quotation}]
+\definehspace [speech] [\hspaceamount\currentlanguage{quotation}]
+
+\definesymbol
+ [\c!leftquotation]
+ [\leftboundarycharacter\c!leftquotation{quotation}]
+
+\definesymbol
+ [\c!rightquotation]
+ [\rightboundarycharacter\c!rightquotation{quotation}]
+
+\definesymbol
+ [\c!leftquote]
+ [\leftboundarycharacter\c!leftquote{quote}]
+
+\definesymbol
+ [\c!rightquote]
+ [\rightboundarycharacter\c!rightquote{quote}]
+
+\definesymbol
+ [\c!leftspeech]
+ [\leftboundarycharacter\c!leftspeech{speech}]
+
+\definesymbol
+ [\c!rightspeech]
+ [\rightboundarycharacter\c!rightspeech{speech}]
+
+\definesymbol
+ [\c!middlespeech]
+ [\leftboundarycharacter\c!middlespeech{speech}]
+
+\appendtoks\def\quotation#1{"#1"}\to\simplifiedcommands
+\appendtoks\def\quote #1{'#1'}\to\simplifiedcommands
+
+%D The next features was so desperately needed by Giuseppe
+%D Bilotta that he made a module for it. Since this is a
+%D typical example of core functionality, I decided to extend
+%D the low level quotation macros in such a way that a speech
+%D feature could be build on top of it. The speech opening and
+%D closing symbols are defined per language. Italian is an
+%D example of a language that has them set.
+
+% this will replace the quotation and speed definitions
+
+\newsignal\delimitedtextsignal
+
+\let\currentdelimitedtext\s!unknown
+
+\def\delimitedtextparameter#1% will be sped up
+ {\executeifdefined{\??ci\currentdelimitedtext:\csname\??ci\currentdelimitedtext\c!level\endcsname#1}%
+ {\executeifdefined{\??ci\currentdelimitedtext#1}%
+ {\executeifdefined{\??ci#1}\empty}}}
+
+\def\definedelimitedtext
+ {\dodoubleempty\dodefinedelimitedtext}
+
+\def\dodefinedelimitedtext[#1][#2]%
+ {\doifassignmentelse{#2}
+ {\getparameters
+ [\??ci#1]
+ [\c!location=\v!margin, % \v!text \v!paragraph
+ \c!spacebefore=,
+ \c!spaceafter=\delimitedtextparameter\c!spacebefore,
+ \c!style=\v!normal,
+ \c!color=,
+ \c!leftmargin=\zeropoint,
+ \c!rightmargin=\delimitedtextparameter\c!leftmargin,
+ \c!indentnext=\v!yes,
+ \c!before=,
+ \c!after=,
+ \c!left=,
+ \c!right=,
+ \c!level=0,
+ \c!repeat=\v!no,
+ \c!method=,
+ #2]}%
+ {\doifdefined{#2}
+ {\copyparameters[\??ci#1][\??ci#2]
+ [\c!location,\c!spacebefore,\c!spaceafter,\c!style,\c!color,
+ \c!leftmargin,\c!rightmargin,\c!indentnext,
+ \c!before,\c!after,\c!left,\c!right]}}%
+ \doifsomething{#1}
+ {\unexpanded\setvalue{#1}{\delimitedtext[#1]}%
+ \setvalue{\e!start#1}{\startdelimitedtext[#1]}%
+ \setvalue{\e!stop #1}{\stopdelimitedtext}}}
+
+\def\setupdelimitedtext
+ {\dotripleargument\dosetupdelimitedtext}
+
+\def\dosetupdelimitedtext[#1][#2][#3]% #2 = optional level
+ {\ifthirdargument
+ \getparameters[\??ci#1:#2][#3]%
+ \else\ifsecondargument
+ \getparameters[\??ci#1][#2]%
+ \else
+ \getparameters[\??ci][#1]%
+ \fi\fi}
+
+\def\dorepeatdelimitedtext
+ {\relax\ifcase\delimitedtextparameter\c!level\else
+ \dohandledelimitedtext\c!middle % maybe better \dohandleleftdelimitedtext
+ \fi}
+
+\let\dohandlerepeatdelimitedtext\relax
+
+\def\startdelimitedtext[#1]%
+ {\bgroup
+ \pushdelimitedtext{#1}%
+ \doifelse{\delimitedtextparameter\c!method}\s!font
+ {\def\dostopdelimitedtext
+ {\removeunwantedspaces\ignoredelimitedtext\c!right}%
+ \ignoredelimitedtext\c!left\ignorespaces}
+ {\doifelse{\delimitedtextparameter\c!repeat}\v!yes
+ {\let\dohandlerepeatdelimitedtext\dorepeatdelimitedtext}%
+ {\let\dohandlerepeatdelimitedtext\relax}%
+ \doifinsetelse{\delimitedtextparameter\c!location}{\v!paragraph,\v!margin}%
+ {\dosingleempty\dostartdelimitedtextpar}\dostartdelimitedtexttxt}}
+
+\def\dostartdelimitedtextpar[#1]%
+ {\let\dostopdelimitedtext\dostopdelimitedtextpar
+ \doifsomething{\delimitedtextparameter\c!spacebefore}
+ {\blank[\delimitedtextparameter\c!spacebefore]}%
+ \delimitedtextparameter\c!before
+ % nicer:
+ % \doadaptleftskip {\delimitedtextparameter\c!leftmargin}%
+ % \doadaptrightskip{\delimitedtextparameter\c!rightmargin}%
+ % backward compatible:
+ \doifelsenothing{#1}
+ {\endgraf
+ \doadaptleftskip {\delimitedtextparameter\c!leftmargin}%
+ \doadaptrightskip{\delimitedtextparameter\c!rightmargin}%
+ \let\dodostopdelimitedtextpar\endgraf}
+ {\startnarrower[#1]\let\dodostopdelimitedtextpar\stopnarrower}%
+ % so far
+ % \dochecknextindentation{\??ci\currentdelimitedtext}% AM: not here
+ \dostartattributes{\??ci\currentdelimitedtext}\c!style\c!color\empty
+ \leftdelimitedtextmark
+ \ignorespaces}
+
+\def\dostopdelimitedtextpar
+ {\removeunwantedspaces
+ \removelastskip
+ \rightdelimitedtextmark
+ \dostopattributes
+ \dodostopdelimitedtextpar
+ \delimitedtextparameter\c!after
+ \doifsomething{\delimitedtextparameter\c!spaceafter}
+ {\blank[\delimitedtextparameter\c!spaceafter]}%
+ \dochecknextindentation{\??ci\currentdelimitedtext}% AM: here
+ \dorechecknextindentation}% AM: This was missing!
+
+\def\dostartdelimitedtexttxt
+ {\let\dostopdelimitedtext\dostopdelimitedtexttxt
+ \dostartattributes{\??ci\currentdelimitedtext}\c!style\c!color\empty
+ \dohandleleftdelimitedtext\c!left
+ \ignorespaces}
+
+\def\dostopdelimitedtexttxt
+ {\removeunwantedspaces
+ \dohandlerightdelimitedtext\c!right
+ \dostopattributes}
+
+\def\stopdelimitedtext
+ {\dostopdelimitedtext
+ \popdelimitedtext
+ \egroup}
+
+\def\pushdelimitedtext#1%
+ {\globalpushmacro\currentdelimitedtext
+ \def\currentdelimitedtext{#1}%
+ \doglobal\incrementvalue{\??ci\currentdelimitedtext\c!level}}
+
+\def\popdelimitedtext
+ {\doglobal\decrementvalue{\??ci\currentdelimitedtext\c!level}%
+ \globalpopmacro\currentdelimitedtext}
+
+\def\delimitedtext[#1]%
+ {\pushdelimitedtext{#1}%
+ \doifelse{\delimitedtextparameter\c!method}\s!font
+ {\dofontdrivendelimited}
+ {\doifinsetelse{\delimitedtextparameter\c!location}{\v!paragraph,\v!margin}%
+ \dodelimitedtextpar\dodelimitedtexttxt}}
+
+% shortcuts
+
+\def\startdelimited{\startdelimitedtext}
+\def\stopdelimited {\stopdelimitedtext} % no let, dynamically assigned
+\def\delimited {\delimitedtext}
+
+\def\leftdelimitedtextmark
+ {\doifsomething{\delimitedtextparameter\c!left}
+ {\setbox\scratchbox\hbox{\delimitedtextparameter\c!left}%
+ \dontleavehmode
+ \doif{\delimitedtextparameter\c!location}\v!margin{\hskip-\wd\scratchbox}%
+ \box\scratchbox}}
+
+\def\rightdelimitedtextmark
+ {\doifsomething{\delimitedtextparameter\c!right}
+ {\hsmash{\delimitedtextparameter\c!right}}}
+
+% \starttext
+% \hyphenatedword{groepsvrijstellingsverordeningen}\par
+% \hyphenatedword{\quote{groepsvrijstellingsverordeningen}}\par
+% \dorecurse{100}{\hskip300pt\hskip\recurselevel pt test \quote{xxx xxxx}.\par}
+% \page \setuppapersize[A5][A4]
+% \quotation {overly beautiful pusillanimous sesquipedalian
+% longwinded} test test test test test test test test test test test
+% test test test test test test test test test test test test test
+% test test test test test test test test test test test test test
+% test test test test test test test test test test test test test
+% test test test
+% \stoptext
+
+\def\dohandledelimitedtext#1#2%
+ {\begingroup
+ \setbox\scratchbox\hbox{\delimitedtextparameter#1}%
+ \ifdim\wd\scratchbox>\zeropoint
+% \ifdim\lastskip=\delimitedtextsignal
+% \unskip
+ \ifdim\lastkern=\delimitedtextsignal
+ \unkern
+ \hskip\hspaceamount\currentlanguage{interquotation}%
+ \else
+ #2%
+ \fi
+ \ifhmode % else funny pagebeaks
+ \penalty\!!tenthousand
+ \hskip\zeropoint % == \prewordbreak
+ \fi
+ \strut % new, needed below
+ \delimitedtextparameter#1% unhbox\scratchbox
+% \penalty\!!tenthousand % else overfull boxes, but that's better than dangling periods
+ \kern\delimitedtextsignal % +- \prewordbreak
+ \fi
+ \endgroup}
+
+\def\dohandleleftdelimitedtext#1#2%
+ {\begingroup
+ \setbox\scratchbox\hbox{\delimitedtextparameter#1}%
+ \ifdim\wd\scratchbox>\zeropoint
+ \ifdim\lastkern=\delimitedtextsignal
+ \unkern
+ \hskip\hspaceamount\currentlanguage{interquotation}%
+ \else\ifdim\lastskip=\delimitedtextsignal
+ \unskip
+ \hskip\hspaceamount\currentlanguage{interquotation}%
+ \else
+ #2%
+ \fi\fi
+ \strut % new, needed below
+ \ifhmode % else funny pagebeaks
+ \penalty\!!tenthousand
+ \hskip\zeropoint % == \prewordbreak
+ \fi
+ \strut % new, needed below
+ \delimitedtextparameter#1% unhbox\scratchbox
+ \hskip\delimitedtextsignal % +- \prewordbreak
+ \fi
+ \endgroup}
+
+\def\dohandlerightdelimitedtext#1#2%
+ {\begingroup
+ \setbox\scratchbox\hbox{\delimitedtextparameter#1}%
+ \ifdim\wd\scratchbox>\zeropoint
+ \ifdim\lastkern=\delimitedtextsignal
+ \unkern
+ \hskip\hspaceamount\currentlanguage{interquotation}%
+ \else\ifdim\lastskip=\delimitedtextsignal
+ \unskip
+ \hskip\hspaceamount\currentlanguage{interquotation}%
+ \else
+ #2%
+ \fi\fi
+ \ifhmode % else funny pagebeaks
+ \penalty\!!tenthousand
+ \hskip\zeropoint % == \prewordbreak
+ \fi
+ \strut % new, needed below
+ \delimitedtextparameter#1% unhbox\scratchbox
+ \kern\delimitedtextsignal % +- \prewordbreak
+ \fi
+ \endgroup}
+
+\def\ignoredelimitedtext#1%
+ {\delimitedtextparameter#1}
+
+\def\handledelimitedtext#1%
+ {\dohandledelimitedtext{#1}\relax}
+
+\def\handleleftdelimitedtext#1%
+ {\dohandleleftdelimitedtext{#1}\relax}
+
+\def\handlerightdelimitedtext#1%
+ {\dohandlerightdelimitedtext{#1}\relax}
+
+\unexpanded\def\dodelimitedtextpar
+ {\dohandleleftdelimitedtext\c!left\relax
+ \groupedcommand
+ \donothing
+ {\dohandlerightdelimitedtext\c!right\removelastskip
+ \popdelimitedtext}}
+
+\unexpanded\def\dodelimitedtexttxt
+ {\doifelse{\delimitedtextparameter\c!style}\v!normal
+ \doquoteddelimited\doattributeddelimited}
+
+\def\doquoteddelimited
+ {\dohandleleftdelimitedtext\c!left\relax
+ \groupedcommand
+ \donothing
+ {\dohandlerightdelimitedtext\c!right
+ \removelastskip
+ \popdelimitedtext}}
+
+\def\doattributeddelimited
+ {\groupedcommand
+ {\dostartattributes{\??ci\currentdelimitedtext}\c!style\c!color}
+ {\dostopattributes
+ \popdelimitedtext}}
+
+\def\dofontdrivendelimited
+ {\simplegroupedcommand
+ {\languageparameter{\c!left\currentdelimitedtext}}
+ {\languageparameter{\c!right\currentdelimitedtext}%
+ \popdelimitedtext}}
+
+% testcase for nesting:
+%
+% \quotation{... \quotation{...} ...}
+% \startquotation ... \startquotation... \quotation{...} \stopquotation\space ...\stopquotation
+% \setupdelimitedtext[quotation][1][left=(,right=)]
+% \setupdelimitedtext[quotation][2][left={[},right={]}]
+% \setupdelimitedtext[quotation][3][left=\{,right=\}]
+% \quotation{... \quotation{...} ...}
+% \startquotation ... \startquotation... \quotation{...} \stopquotation\space ...\stopquotation
+
+\definedelimitedtext
+ [\v!quotation]
+ [\c!left={\symbol[\c!leftquotation]},
+ \c!right={\symbol[\c!rightquotation]},
+ \c!leftmargin=\v!standard]
+
+\definedelimitedtext
+ [\v!quote][\v!quotation]
+
+\setupdelimitedtext
+ [\v!quote]
+ [\c!location=\v!text,
+ \c!left={\symbol[\c!leftquote]},
+ \c!right={\symbol[\c!rightquote]}]
+
+\definedelimitedtext
+ [\v!blockquote][\v!quotation]
+
+\setupdelimitedtext
+ [\v!blockquote]
+ [\c!left=,
+ \c!right=]
+
+\definedelimitedtext
+ [\v!speech][\v!quotation]
+
+\setupdelimitedtext
+ [\v!speech]
+ [\c!repeat=\v!yes,
+ \c!left={\symbol[\c!leftspeech]},
+ \c!middle={\symbol[\c!middlespeech]},
+ \c!right={\symbol[\c!rightspeech]}]
+
+% how do we call an tight quote
+%
+% \definedelimitedtext
+% [\v!quotation][\v!quotation]
+%
+% \setupdelimitedtext
+% [\v!quotation]
+% [\c!indentnext=\v!no,
+% \c!spacebefore=\v!nowhite]
+
+\def\setupquotation{\setupdelimitedtext[\v!quotation]}
+\def\setupquote {\setupdelimitedtext[\v!quote]}
+
+% seldom used, move from kernel to run time module
+
+\ifx\tfx\undefined \let\tfx\relax \fi
+
+\def\basegrid
+ {\dosingleempty\dobasegrid}
+
+\def\dobasegrid[#1]%
+ {\begingroup
+ \getparameters[\??rt]
+ [\c!x=0,\c!y=0,
+ \c!nx=10,\c!ny=10,
+ \c!dx=.5,\c!dy=.5,
+ \c!xstep=0,\c!ystep=0,
+ \c!unit=\s!cm,
+ \c!scale=1,
+ \c!factor=1,
+ \c!offset=\v!yes,
+ \c!location=\v!left,
+ #1]%
+ \startpositioning
+ \dimen0=\@@rtdx\@@rtunit\relax
+ \dimen0=\@@rtscale\dimen0\relax
+ \dimen0=\@@rtfactor\dimen0\relax
+ \multiply\dimen0 \@@rtnx\relax
+ \dimen2=\@@rtdy\@@rtunit\relax
+ \dimen2=\@@rtscale\dimen2\relax
+ \dimen2=\@@rtfactor\dimen2\relax
+ \multiply\dimen2 \@@rtny\relax
+ \def\horline
+ {\vbox
+ {\hrule
+ \!!width \dimen0
+ \!!height \linewidth
+ \!!depth \!!zeropoint}}%
+ \def\verline%
+ {\vrule
+ \!!width \linewidth
+ \!!height \dimen2
+ \!!depth \!!zeropoint}%
+ \doglobal\newcounter\@@gridc
+ \doglobal\newcounter\@@gridd
+ \doglobal\newcounter\@@gride
+ \def\setlegend##1##2##3%
+ {\gdef\@@gridc{0}%
+ \dimen0=2em\relax
+ \dimen2=##2\@@rtunit\relax
+ \dimen2=\@@rtscale\dimen2\relax
+ \dimen2=\@@rtfactor\dimen2\relax
+ \divide\dimen0 \dimen2\relax
+ \xdef\@@gride{\number\dimen0}%
+ \ifnum\@@gride>50
+ \gdef\@@gride{100}%
+ \else\ifnum\@@gride>10
+ \gdef\@@gride{50}%
+ \else\ifnum\@@gride>5
+ \gdef\@@gride{10}%
+ \else\ifnum\@@gride>1
+ \gdef\@@gride{5}%
+ \else
+ \gdef\@@gride{1}%
+ \fi\fi\fi\fi
+ \gdef\@@gridd{0}%
+ \def\legend
+ {\ifnum\@@gridd=\zerocount
+ \vbox
+ {\increment(\@@gridc,##1)%
+ \hbox to 2em{\hss\@@gridc\hss}}%
+ \global\let\@@gridd=\@@gride
+ \fi
+ \doglobal\decrement\@@gridd
+ \doglobal\increment(\@@gridc,##1)}}%
+ \def\draw##1##2##3##4##5##6##7##8##9%
+ {\setuppositioning
+ [\c!state=##8,
+ \c!xstep=\v!absolute,
+ \c!ystep=\v!absolute,
+ \c!unit=\@@rtunit,
+ \c!scale=\@@rtscale,
+ \c!factor=\@@rtfactor,
+ \c!offset=\@@rtoffset,
+ \c!xoffset=##6,
+ \c!yoffset=##7]%
+ \doifelse{##9}\v!middle
+ {\scratchdimen##3pt\scratchdimen.5\scratchdimen
+ \edef\@@psxx{\withoutpt\the\scratchdimen}%
+ \scratchdimen##4pt\scratchdimen.5\scratchdimen
+ \edef\@@psyy{\withoutpt\the\scratchdimen}%
+ \scratchcounter##2\advance\scratchcounter -1
+ \edef\@@pszz{\the\scratchcounter}}
+ {\edef\@@psxx{0}\edef\@@psyy{0}\edef\@@pszz{##2}}%
+ \position(\@@psxx,\@@psyy){##1}%
+ \setuppositioning
+ [\c!state=##8,
+ \c!xstep=\v!relative,
+ \c!ystep=\v!relative,
+ \c!scale=\@@rtscale,
+ \c!factor=\@@rtfactor,
+ \c!offset=\@@rtoffset,
+ \c!unit=\@@rtunit]%
+ \dorecurse\@@pszz{\position(##3,##4){##5}}}%
+ \draw
+ \verline\@@rtnx\@@rtdx0\verline\!!zeropoint\!!zeropoint\v!start\empty
+ \draw
+ \horline\@@rtny0\@@rtdy\horline\!!zeropoint\!!zeropoint\v!start\empty
+ \tfx
+ \doifnot\@@rtxstep{0}
+ {\setlegend\@@rtxstep\@@rtdx\@@rtx
+ \draw\legend\@@rtnx\@@rtdx0\legend{-1em}{-1.5em}\v!overlay\@@rtlocation}%
+ \doifnot\@@rtystep{0}
+ {\setlegend\@@rtystep\@@rtdy\@@rty
+ \draw\legend\@@rtny0\@@rtdy\legend{-2em}{-.75ex}\v!overlay\@@rtlocation}%
+ \stoppositioning
+ \endgroup}
+
+\let\grid\basegrid
+
+% Dit wordt:
+%
+% \doorverwijzen[naam][instellingen] enz.
+%
+% waarbij <naam> bijvoorbeeld publicatie is. Dit levert:
+%
+% \start<naam>
+% \stop<naam>
+%
+% \beginvan<naam>
+% \eindvan<naam>
+%
+% \publicatie
+%
+% \volledigelijstmetpublicaties
+%
+% eigenlijk kan ook door... zo worden uitgebreid!
+
+% old, will become obsolete or module, replace by bib module
+
+% \defineenumeration
+% [@publicatie]
+% [\c!location=\v!left,
+% \c!width=\@@pbwidth,\c!hang=,\c!sample=,
+% \c!before=\@@pbbefore,\c!after=\@@pbafter,\c!inbetween=,
+% \c!headstyle=\@@pbheadstyle,\c!style=,
+% \c!headcolor=\@@pbheadcolor,\c!color=,
+% \c!way=\@@pbway,\c!blockway=\@@pbblockway,
+% \c!text=,\c!left=\@@pbleft,\c!right=\@@pbright]
+
+% \def\dosetuppublications[#1]%
+% {\getparameters[\??pb][#1]}
+%
+% \def\setuppublications%
+% {\dosingleargument\dosetuppublications}
+%
+% \def\apa@publicatie
+% {\doifsomething\@@pb@naam {\@@pb@naam,\space}%
+% \doifsomething\@@pb@titel {{\sl\@@pb@titel}.\space}%
+% \doifsomething\@@pb@jaar {(\@@pb@jaar).\space}%
+% \doifsomething\@@pb@plaats {\@@pb@plaats\doifelsenothing\@@pb@uitgever{.}{:\space}}%
+% \doifsomething\@@pb@uitgever{\@@pb@uitgever.}}
+%
+% \def\normaal@publicatie
+% {\@@pb@naam, \@@pb@titel, \@@pb@jaar, \@@pb@pagina, \@@pb@plaats, \@@pb@uitgever.}
+%
+% \def\complexstartpublicatie[#1]#2\stoppublicatie
+% {\bgroup
+% \def\dosetpublicatie
+% {\processcommalist
+% [naam,titel,jaar,plaats,pagina,uitgever]
+% \setpublicatie
+% \ignorespaces}%
+% \def\setpublicatie##1%
+% {\letvalue{\??pb @##1}\empty
+% \setvalue{##1}####1{\setvalue{\??pb @##1}{####1}\ignorespaces}}%
+% \def\getpublicatie%
+% {\doifsomething\@@pbalternative{\getvalue{\@@pbalternative @publicatie}}}%
+% \doifelse\@@pbnumbering\v!yes
+% {\@publicatie[#1]\dosetpublicatie#2\getpublicatie\par}%
+% {\@@pbbefore
+% \dosetpublicatie\ignorespaces#2\getpublicatie
+% \@@pbafter}%
+% \egroup}
+%
+% \definecomplexorsimpleempty\startpublicatie
+%
+% \def\publication#1[#2]%
+% {\@@pbleft\in{#1}[#2]\@@pbright}
+%
+% \setuppublications
+% [\c!numbering=\v!yes,
+% \c!alternative=\c!apa,
+% \c!width=2em,
+% \c!hang=,
+% \c!sample=,
+% \c!before=,
+% \c!after=,
+% \c!inbetween=,
+% \c!headstyle=,
+% \c!headcolor=,
+% \c!style=,
+% \c!color=,
+% \c!blockway=\v!by\v!text,
+% \c!way=\v!by\v!text,
+% \c!text=,
+% \c!left={[},
+% \c!right={]}]
+
+% only used at pragma, move from kernel to run time module
+
+\def\referraldate
+ {\currentdate[\v!referral]}
+
+\def\doreferral[#1]%
+ {\noheaderandfooterlines
+ \bgroup
+ \getparameters
+ [\??km]
+ [\c!bet=\unknown,\c!dat=\unknown,\c!ken=\unknown,
+ \c!from=,\c!to=,\c!ref=,#1]%
+ % moet anders, hoort niet in 01b
+ \assigntranslation[\s!nl=referentie,\s!en=reference,\s!de=Referenz,\s!sp=referencia]\to\@@@kmref
+ \assigntranslation[\s!nl=van,\s!en=from,\s!de=Von,\s!sp=de]\to\@@@kmvan
+ \assigntranslation[\s!nl=aan,\s!en=to,\s!de=An,\s!sp=a]\to\@@@kmaan
+ \assigntranslation[\s!nl=betreft,\s!en=concerns,\s!de=Betreff,\s!sp=]\to\@@@kmbet
+ \assigntranslation[\s!nl=datum,\s!en=date,\s!de=Datum,\s!sp=fecha]\to\@@@kmdat
+ \assigntranslation[\s!nl=kenmerk,\s!en=mark,\s!de=Kennzeichen,\s!sp=]\to\@@@kmken
+ %
+ \definetabulate[\s!dummy][|l|p|]
+ \startdummy
+ \NC\@@@kmbet\EQ\@@kmbet\NC\NR
+ \NC\@@@kmdat\EQ\@@kmdat\NC\NR
+ \NC\@@@kmken\EQ\expanded{\smallcapped{\@@kmken}}\NC\NR
+ \doifsomething{\@@kmfrom\@@kmto}{\NC\NC\NC\NR}%
+ \doifsomething \@@kmfrom {\NC\@@@kmvan\EQ\@@kmfrom\NC\NR}%
+ \doifsomething \@@kmto {\NC\@@@kmaan\EQ\@@kmto\NC\NR}%
+ \doifsomething \@@kmref {\NC\NC\NC\NR\NC\@@@kmref\EQ\@@kmref\NC\NR}%
+ \stopdummy
+ \egroup}
+
+\def\referral
+ {\dosingleargument\doreferral}
+
+% FUZZY OLD STUFF: will be removed when not used in some manual;
+% rows instead of columns, i'd forgotten that this code exist
+%
+% \definesystemvariable{ri}
+%
+% \def\setuprows
+% {\dodoubleargument\getparameters[\??ri]}
+%
+% \definecomplexorsimpleempty\startrows
+%
+% \def\complexstartrows[#1]%
+% {\bgroup
+% \setuprows[#1]%
+% \let\do@@ribottom\relax
+% \def\row
+% {\do@@ribottom
+% \egroup
+% \dimen0\vsize
+% \divide\dimen0 \@@rin
+% \advance\dimen0 -\lineskip
+% \vbox to \dimen0
+% \bgroup
+% \@@ritop
+% \let\do@@ribottom\@@ribottom
+% \ignorespaces}%
+% \bgroup
+% \row}
+%
+% \def\stoprows
+% {\do@@ribottom
+% \egroup
+% \egroup}
+%
+% \setuprows
+% [\c!n=2,
+% \c!top=,
+% \c!bottom=\vfill]
+
+% THIS WAS MAIN-003.TEX
+
+% messages moved
+
+% messages moved
+
+% messages moved
+
+% messages moved
+
+% messages moved
+
+% messages moved
+
+% messages moved
+
+% messages moved
+
+\definetabulate
+ [\v!legend]
+ [|emj1|i1|mR|]
+
+\setuptabulate
+ [\v!legend]
+ [\c!unit=.75em,\c!inner=\setquicktabulate\leg,EQ={=}]
+
+\definetabulate
+ [\v!legend][\v!two]
+ [|emj1|emk1|i1|mR|]
+
+\definetabulate
+ [\v!fact]
+ [|R|ecmj1|i1mR|]
+
+\setuptabulate
+ [\v!fact]
+ [\c!unit=.75em,\c!inner=\setquicktabulate\fact,EQ={=}]
+
+\unexpanded\def\xbox
+ {\bgroup\aftergroup\egroup\hbox\bgroup\tx\let\next=}
+
+\unexpanded\def\xxbox
+ {\bgroup\aftergroup\egroup\hbox\bgroup\txx\let\next=}
+
+% \def\mrm#1%
+% {$\rm#1$}
+
+%D \macros
+%D {definepairedbox, setuppairedbox, placepairedbox}
+%D
+%D Paired boxes, formally called legends, but from now on a
+%D legend is just an instance, are primarily meant for
+%D typesetting some text alongside an illustration. Although
+%D there is quite some variation possible, the functionality is
+%D kept simple, if only because in most cases such pairs are
+%D typeset sober.
+%D
+%D The location specification accepts a pair, where the first
+%D keyword specifies the arrangement, and the second one the
+%D alignment. The first key of the location pair is one of
+%D \type {left}, \type {right}, \type {top} or \type {bottom},
+%D while the second key can also be \type {middle}.
+%D
+%D The first box is just collected in an horizontal box, but
+%D the second one is a vertical box that gets passed the
+%D bodyfont and alignment settings.
+
+%D Today we would implement this using layers .... but for the
+%D moment we keep it this way.
+
+% \startbuffer[test]
+% \test left \test left,top \test left,bottom \test left,middle
+% \test right \test right,top \test right,bottom \test right,middle
+% \test top \test top,left \test top,right \test top,middle
+% \test bottom \test bottom,left \test bottom,right \test bottom,middle
+% \stopbuffer
+%
+% \def\showtest#1%
+% {\pagina
+% \typebuffer[demo]
+% \def\test##1
+% {\startlinecorrection[blank]
+% \getbuffer[demo]%
+% \ruledhbox\placelegend
+% [bodyfont=6pt,location={##1}]
+% {\framed[width=.25\textwidth]{\tttf##1}}
+% {#1}
+% \stoplinecorrection}
+% \getbuffer[test]}
+%
+% \startbuffer[demo]
+% \setuplegend
+% [width=\hsize,maxwidth=\makeupwidth,
+% height=\vsize,maxheight=\makeupheight]
+% \stopbuffer
+%
+% \showtest{These examples demonstrate the default settings.}
+%
+% \startbuffer[demo]
+% \setuplegend
+% [width=\textwidth,
+% maxwidth=\textwidth]
+% \stopbuffer
+%
+% \showtest{\input tufte }
+%
+% \startbuffer[demo]
+% \setuplegend
+% [width=.65\textwidth]
+% \stopbuffer
+%
+% \showtest{\input knuth }
+%
+% \startbuffer[demo]
+% \setuplegend
+% [height=2cm]
+% \stopbuffer
+%
+% \showtest{These examples demonstrate some other settings.}
+%
+% \startbuffer[demo]
+% \setuplegend
+% [width=.65\textwidth,
+% height=2cm]
+% \stopbuffer
+%
+% \showtest{These examples demonstrate some other settings.}
+%
+% \startbuffer[demo]
+% \setuplegend
+% [n=2,align=right,width=.5\textwidth]
+% \stopbuffer
+%
+% \showtest{\input zapf }
+
+%D \macros
+%D {setuplegend, placelegend}
+%D
+%D It makes sense to typeset a legend to a figure in \TEX\
+%D and not in a drawing package. The macro \type {\placelegend}
+%D combines a figure (or something else) and its legend. This
+%D command is just a paired box.
+%D
+%D The legend is placed according to \type {location}, being
+%D \type {bottom} or \type {right}. The macro macro is used as
+%D follows.
+%D
+%D \starttyping
+%D \placefigure
+%D {whow}
+%D {\placelegend
+%D {\externalfigure[cow]}
+%D {\starttabulation
+%D \NC 1 \NC head \NC \NR
+%D \NC 2 \NC legs \NC \NR
+%D \NC 3 \NC tail \NC \NR
+%D \stoptabulation}}
+%D
+%D \placefigure
+%D {whow}
+%D {\placelegend
+%D {\externalfigure[cow]}
+%D {\starttabulation[|l|l|l|l|]
+%D \NC 1 \NC head \NC 3 \NC tail \NC \NR
+%D \NC 2 \NC legs \NC \NC \NC \NR
+%D \stoptabulation}}
+%D
+%D \placefigure
+%D {whow}
+%D {\placelegend[n=2]
+%D {\externalfigure[cow]}
+%D {\starttabulation
+%D \NC 1 \NC head \NC \NR
+%D \NC 2 \NC legs \NC \NR
+%D \NC 3 \NC tail \NC \NR
+%D \stoptabulation}}
+%D
+%D \placefigure
+%D {whow}
+%D {\placelegend[n=2]
+%D {\externalfigure[cow]}
+%D {head \par legs \par tail}}
+%D
+%D \placefigure
+%D {whow}
+%D {\placelegend[n=2]
+%D {\externalfigure[cow]}
+%D {\startitemize[packed]
+%D \item head \item legs \item tail \item belly \item horns
+%D \stopitemize}}
+%D
+%D \placefigure
+%D {whow}
+%D {\placelegend[n=2,width=.8\hsize]
+%D {\externalfigure[cow]}
+%D {\startitemize[packed]
+%D \item head \item legs \item tail \item belly \item horns
+%D \stopitemize}}
+%D \stoptyping
+
+\newbox\firstpairedbox
+\newbox\secondpairedbox
+
+\def\definepairedbox
+ {\dodoubleempty\dodefinepairedbox}
+
+\def\dodefinepairedbox[#1][#2]%
+ {\getparameters
+ [\??ld#1]
+ [\c!n=1,
+ \c!distance=\bodyfontsize,
+ \c!before=,
+ \c!after=,
+ \c!color=,
+ \c!style=,
+ \c!inbetween={\blank[\v!medium]},
+ \c!width=\hsize,
+ \c!height=\vsize,
+ \c!maxwidth=\textwidth, % \makeupwidth,
+ \c!maxheight=\textheight, % \makeupheight,
+ \c!bodyfont=,
+ \c!align=,
+ \c!location=\v!bottom,
+ #2]%
+ \setvalue{\e!setup#1\e!endsetup}{\setuppairedbox[#1]}%
+ \setvalue{\e!place#1}{\placepairedbox[#1]}}
+
+\def\setuppairedbox
+ {\dodoubleempty\dosetuppairedbox}
+
+\def\dosetuppairedbox[#1]%
+ {\getparameters[\??ld#1]}
+
+\def\placepairedbox
+ {\bgroup\dodoubleempty\doplacepairedbox}
+
+\def\doplacepairedbox[#1][#2]% watch the hsize/vsize tricks
+ {\setuppairedbox[#1][#2]% % and don't change them
+ \copyparameters % brrr
+ [\??ld][\??ld#1]
+ [\c!n,\c!distance,\c!inbetween,\c!before,\c!after,
+ \c!width,\c!height,\c!maxwidth,\c!maxheight,
+ \c!color,\c!style,\c!bodyfont,\c!align,\c!location]%
+ \@@ldbefore\bgroup
+ \global\setsystemmode{pairedbox}%
+ \beforefirstpairedbox
+ \dowithnextbox
+ {\betweenbothpairedboxes
+ \dowithnextbox
+ {\afterbothpairedboxes
+ \egroup\@@ldafter
+ \egroup}
+ \vbox\bgroup
+ \insidesecondpairedbox
+ \let\next=}
+ \hbox}
+
+\def\beforefirstpairedbox
+ {\chardef\pairedlocationa1 % left
+ \chardef\pairedlocationb4 % middle
+ \getfromcommacommand[\@@ldlocation][1]%
+ \processaction
+ [\commalistelement]
+ [ \v!left=>\chardef\pairedlocationa0,
+ \v!right=>\chardef\pairedlocationa1,
+ \v!top=>\chardef\pairedlocationa2,
+ \v!bottom=>\chardef\pairedlocationa3]%
+ \getfromcommacommand[\@@ldlocation][2]%
+ \processaction
+ [\commalistelement]
+ [ \v!left=>\chardef\pairedlocationb0,
+ \v!right=>\chardef\pairedlocationb1,
+ \v!high=>\chardef\pairedlocationb2,
+ \v!top=>\chardef\pairedlocationb2,
+ \v!low=>\chardef\pairedlocationb3,
+ \v!bottom=>\chardef\pairedlocationb3,
+ \v!middle=>\chardef\pairedlocationb4]}
+
+\def\betweenbothpairedboxes
+ {\switchtobodyfont[\@@ldbodyfont]% split under same regime
+ \setbox\firstpairedbox\flushnextbox
+ \ifnum\pairedlocationa<2
+ \hsize\wd\firstpairedbox % trick
+ \hsize\@@ldwidth
+ \scratchdimen\wd\firstpairedbox
+ \advance\scratchdimen \@@lddistance
+ \bgroup\advance\scratchdimen \hsize
+ \ifdim\scratchdimen>\@@ldmaxwidth\relax
+ \egroup
+ \hsize\@@ldmaxwidth
+ \advance\hsize -\scratchdimen
+ \else
+ \egroup
+ \fi
+ \else
+ \hsize\wd\firstpairedbox
+ \hsize\@@ldwidth % can be \hsize
+ \ifdim\hsize>\@@ldmaxwidth\relax \hsize\@@ldmaxwidth \fi % can be \hsize
+ \fi
+ \ifnum\@@ldn>\plusone
+ \setrigidcolumnhsize\hsize\@@lddistance\@@ldn
+ \fi}
+
+\def\afterbothpairedboxes
+ {\setbox\secondpairedbox\vbox
+ {% \localstartcolor[\@@ldcolor]% does not work yet
+ \ifnum\@@ldn>1
+ \rigidcolumnbalance\nextbox
+ \else
+ \flushnextbox
+ \fi
+ }% \localstopcolor}%
+ \ifnum\pairedlocationa<2\hbox\else\vbox\fi\bgroup % hide vsize
+ \forgetall
+ \ifnum\pairedlocationa<2
+ \scratchdimen\maxoftwoboxdimens\ht\firstpairedbox\secondpairedbox
+ \vsize\scratchdimen
+ \ifdim\scratchdimen<\@@ldheight\relax % can be \vsize
+ \scratchdimen\@@ldheight
+ \fi
+ \ifdim\scratchdimen>\@@ldmaxheight\relax
+ \scratchdimen\@@ldmaxheight
+ \fi
+ \valignpairedbox\firstpairedbox \scratchdimen
+ \valignpairedbox\secondpairedbox\scratchdimen
+ \else
+ \scratchdimen\maxoftwoboxdimens\wd\firstpairedbox\secondpairedbox
+ \halignpairedbox\firstpairedbox \scratchdimen
+ \halignpairedbox\secondpairedbox\scratchdimen
+ \scratchdimen\ht\secondpairedbox
+ \vsize\scratchdimen
+ \ifdim\ht\secondpairedbox<\@@ldheight\relax % can be \vsize
+ \scratchdimen\@@ldheight\relax % \relax needed
+ \fi
+ \ifdim\scratchdimen>\@@ldmaxheight\relax % todo: totale hoogte
+ \scratchdimen\@@ldmaxheight\relax % \relax needed
+ \fi
+ \ifdim\scratchdimen>\ht\secondpairedbox
+ \setbox\secondpairedbox\vbox to \scratchdimen
+ {\ifnum\pairedlocationa=3 \vss\fi %
+ \box\secondpairedbox
+ \ifnum\pairedlocationa=2 \vss\fi}% \kern\zeropoint
+ \fi
+ \fi
+ \ifcase\pairedlocationa
+ \box\secondpairedbox\hskip\@@lddistance\box\firstpairedbox \or
+ \box\firstpairedbox \hskip\@@lddistance\box\secondpairedbox\or
+ \box\secondpairedbox\endgraf \nointerlineskip \@@ldinbetween \box\firstpairedbox \or
+ \box\firstpairedbox \endgraf \nointerlineskip \@@ldinbetween \box\secondpairedbox\else
+ \fi
+ \egroup}
+
+\def\insidesecondpairedbox
+ {\forgetall
+ \setupalign[\@@ldalign]%
+ \tolerantTABLEbreaktrue % hm.
+ \blank[\v!disable]%
+ \everypar{\begstrut}}
+
+\def\maxoftwoboxdimens#1#2#3%
+ {#1\ifdim#1#2>#1#3 #2\else#3\fi}
+
+\def\valignpairedbox#1#2%
+ {\setbox#1\vbox to #2
+ {\ifcase\pairedlocationb\or\or\or\vss\or\vss\fi
+ \box#1\relax
+ \ifcase\pairedlocationb\or\or\vss\or\or\vss\fi}}
+
+\def\halignpairedbox#1#2%
+ {\setbox#1\hbox to #2
+ {\ifcase\pairedlocationb\or\hss\or\or\or\hss\fi
+ \box#1\relax
+ \ifcase\pairedlocationb\hss\or\or\or\or\hss\fi}}
+
+\definepairedbox[\v!legend]
+
+%D Goody:
+
+\appendtoks
+ \global\resetsystemmode{combination}%
+ \global\resetsystemmode{pairedbox}%
+\to \everyinsidefloat
+
+% todo: \startcombination \startcomb \stopcomb ...
+
+\newcount\horcombination % counter
+\newcount\totcombination
+
+\def\definecombination
+ {\dodoubleempty\dodefinecombination}
+
+\def\dodefinecombination[#1][#2]%
+ {\copyparameters
+ [\??co#1][\??co]
+ [\c!width,\c!height,\c!distance,\c!location,%
+ \c!before,\c!inbetween,\c!after,\c!align,%
+ \c!style,\c!color]%
+ \getparameters
+ [\??co#1][#2]}
+
+\def\setupcombinations
+ {\dodoubleempty\dosetupcombinations}
+
+\def\dosetupcombinations[#1][#2]%
+ {\ifsecondargument
+ \getparameters[\??co#1][#2]%
+ \else
+ \getparameters[\??co][#1]%
+ \fi}
+
+\def\combinationparameter#1%
+ {\csname\??co\currentcombination#1\endcsname}%
+
+\def\startcombination
+ {\bgroup % so we can grab a group
+ \dodoubleempty\dostartcombination}
+
+% \startcombination {alpha} {a} {beta} {b} \stopcombination
+% \startcombination[2*1] {alpha} {a} {beta} {b} \stopcombination
+% \startcombination[1*2] {alpha} {a} {beta} {b} \stopcombination
+% \startcombination[2] {alpha} {a} {beta} {b} \stopcombination
+
+\def\dostartcombination[#1][#2]%
+ {\global\setsystemmode{combination}%
+ \doifnothing{#1}\firstargumentfalse % to be sure (when called in macros)
+ \doifnothing{#2}\secondargumentfalse % to be sure (when called in macros)
+ \ifsecondargument
+ \def\currentcombination{#1}%
+ \edef\currentcombinationspec{#2*1*}%
+ \else % better : \doifcombinationelse ... \??co#1\c!location
+ \doifinstringelse{*}{#1}
+ {\let\currentcombination\empty
+ \edef\currentcombinationspec{#1*1*}}
+ {\doifnumberelse{#1}
+ {\let\currentcombination\empty
+ \edef\currentcombinationspec{#1*1*}}
+ {\def\currentcombination{#1}%
+ \edef\currentcombinationspec{2*1*}}}%
+ \fi
+ \forgetall
+ \doifelse{\combinationparameter\c!height}\v!fit
+ \vbox {\vbox to \combinationparameter\c!height}%
+ \bgroup
+ \expanded{\dodostartcombination[\currentcombinationspec]}}
+
+\long\def\dodostartcombination[#1*#2*#3]%
+ {\setuphorizontaldivision
+ [\c!n=\v!fit,\c!distance=\combinationparameter\c!distance]%
+ \global\horcombination#1%
+ \global\totcombination#2%
+ \global\setbox\combinationstack\emptybox
+ \xdef\maxhorcombination{\the\horcombination}%
+ \multiply\totcombination\horcombination
+ \tabskip\zeropoint
+ \doifelse{\combinationparameter\c!width}\v!fit
+ {\halign}{\halign to \combinationparameter\c!width}%
+ \bgroup&%
+ %\hfil##\hfil% now : location={left,top}
+ \expanded{\doifnotinset{\v!left}{\combinationparameter\c!location}}\hfil
+ ##%
+ \expanded{\doifnotinset{\v!right}{\combinationparameter\c!location}}\hfil
+ &\tabskip\zeropoint \!!plus 1fill##\cr
+ \docombination}
+
+\def\docombination % we want to add struts but still ignore an empty box
+ {\dowithnextbox
+ {\setbox0\flushnextbox
+ \dowithnextbox
+ {\setbox2\flushnextbox
+ \dodocombination}%
+ \vtop\bgroup
+ \def\next
+ {\futurelet\nexttoken\nextnext}%
+ \def\nextnext
+ {\ifx\nexttoken\egroup \else % the next box is empty
+ \hsize\wd0
+ \setupalign[\combinationparameter\c!align]%
+ \dostartattributes{\??co\currentcombination}\c!style\c!color\empty
+ \bgroup
+ \aftergroup\endstrut
+ \aftergroup\dostopattributes
+ \aftergroup\egroup
+ \begstrut
+ \fi}%
+ \afterassignment\next\let\nexttoken=}
+ \hbox}
+
+% stupid version, does not align top stuff when captions,
+% keep as example
+%
+% \def\dodocombination
+% {\vbox
+% {\forgetall % \setupwhitespace[\v!none]%
+% \let\next\vbox
+% \ExpandFirstAfter\processallactionsinset
+% [\combinationparameter\c!location]
+% [ \v!top=>\let\next\tbox,
+% \v!middle=>\let\next\halfwaybox]%
+% \next{\copy0}%
+% \ifdim\ht2>\zeropoint % beter dan \wd2, nu \strut mogelijk
+% \combinationparameter\c!inbetween
+% %\vtop % wrong code
+% % {\nointerlineskip % recently added
+% % \hsize\wd0
+% % \setupalign[\combinationparameter\c!align]% % \raggedcenter
+% % \begstrut\unhbox2\endstrut}%
+% \box2
+% \fi}%
+% \ifnum\totcombination>\plusone
+% \global\advance\totcombination\minusone
+% \global\advance\horcombination\minusone
+% \ifnum\horcombination=\zerocount
+% \def\next
+% {\cr\noalign
+% {\forgetall % \setupwhitespace[\v!geen]% no
+% \nointerlineskip
+% \combinationparameter\c!before
+% \combinationparameter\c!after
+% \vss
+% \nointerlineskip}%
+% \global\horcombination\maxhorcombination\relax
+% \docombination}%
+% \else
+% \def\next
+% {&&&\hskip\combinationparameter\c!distance&\docombination}%
+% \fi
+% \else
+% \def\next
+% {\cr\egroup}%
+% \fi
+% \next}
+
+% \def\dodocombination
+% {\vbox
+% {\forgetall % \setupwhitespace[\v!none]%
+% \let\next\vbox
+% \ExpandFirstAfter\processallactionsinset
+% [\combinationparameter\c!plaats]
+% [ \v!top=>\let\next\tbox,
+% \v!middle=>\let\next\halfwaybox]%
+% \next{\copy0}%
+% % we need to save the caption for a next alignment line
+% \saveoncombinationstack2}%
+% \ifnum\totcombination>\plusone
+% \global\advance\totcombination\minusone
+% \global\advance\horcombination\minusone
+% \ifnum\horcombination=\zerocount
+% \def\next
+% {\cr
+% \flushcombinationstack
+% \noalign
+% {\forgetall % \setupwhitespace[\v!none]% no
+% \global\setbox\combinationstack\emptybox
+% \nointerlineskip
+% \combinationparameter\c!after
+% \combinationparameter\c!before
+% \vss
+% \nointerlineskip}%
+% \global\horcombination\maxhorcombination\relax
+% \docombination}%
+% \else
+% \def\next
+% {&&&\hskip\combinationparameter\c!distance&\docombination}%
+% \fi
+% \else
+% \def\next
+% {\cr
+% \flushcombinationstack
+% \egroup}%
+% \fi
+% \next}
+
+\def\depthonlybox
+ {\dowithnextbox{\vtop{\hsize\wd\nextbox\kern\zeropoint\box\nextbox}}\vbox}
+
+% \def\boxwithstrutheight
+% {\dowithnextbox
+% {\scratchdimen\strutheight
+% \advance\scratchdimen-\nextboxht
+% \hbox{\raise\scratchdimen\box\nextbox}}%
+% \vbox}
+
+\def\dodocombination
+ {\vbox
+ {\forgetall % \setupwhitespace[\v!none]%
+ \let\next\vbox
+ \expanded{\processallactionsinset[\combinationparameter\c!location]}
+ [ \v!top=>\let\next\depthonlybox, % \tbox,
+ \v!middle=>\let\next\halfwaybox]%
+ \next{\copy0}%
+ % we need to save the caption for a next alignment line
+ \saveoncombinationstack2}%
+ \ifnum\totcombination>\plusone
+ \global\advance\totcombination\minusone
+ \global\advance\horcombination\minusone
+ \ifnum\horcombination=\zerocount
+ \def\next
+ {\cr
+ \flushcombinationstack
+ \noalign
+ {\forgetall % \setupwhitespace[\v!none]% no
+ \global\setbox\combinationstack\emptybox
+ \nointerlineskip
+ \combinationparameter\c!after
+ \combinationparameter\c!before
+ \vss
+ \nointerlineskip}%
+ \global\horcombination\maxhorcombination\relax
+ \docombination}%
+ \else
+ \def\next
+ {&&&\hskip\combinationparameter\c!distance&\docombination}%
+ \fi
+ \else
+ \def\next
+ {\cr
+ \flushcombinationstack
+ \egroup}%
+ \fi
+ \next}
+
+% formally ok:
+%
+% \def\stopcombination
+% {\egroup
+% \egroup}
+%
+% more robust:
+%
+% \def\stopcombination
+% {{}{}{}{}{}{}{}{}% catches (at most 4) missing entries
+% \egroup
+% \egroup}
+%
+% even better:
+
+\def\stopcombination
+ {{\scratchtoks{{}{}{}}\dorecurse\totcombination{\appendtoks{}{}{}{}\to\scratchtoks}\expandafter}\the\scratchtoks
+ \egroup
+ \egroup}
+
+\newbox\combinationstack
+
+\def\saveoncombinationstack#1%
+ {\global\setbox\combinationstack\hbox
+ {\hbox{\box#1}\unhbox\combinationstack}}
+
+\def\flushcombinationstack
+ {\noalign
+ {\ifdim\ht\combinationstack>\zeropoint
+\nointerlineskip % nieuw
+ \combinationparameter\c!inbetween
+ \global\horcombination\maxhorcombination
+ \globallet\doflushcombinationstack\dodoflushcombinationstack
+ \else
+ \global\setbox\combinationstack\emptybox
+ \globallet\doflushcombinationstack\donothing
+ \fi}%
+ \doflushcombinationstack\crcr}
+
+\gdef\dodoflushcombinationstack
+ {\global\setbox\combinationstack\hbox
+ {\unhbox\combinationstack
+ \global\setbox1\lastbox}%
+ \box1% \ruledhbox{\box1}%
+ \global\advance\horcombination\minusone\relax
+ \ifnum\horcombination>\zerocount
+ \def\next{&&&&\doflushcombinationstack}%
+ \else
+ \global\setbox\combinationstack\emptybox
+ %\let\next\relax
+ \@EA\gobbleoneargument
+ \fi
+ \next}
+
+\setupcombinations
+ [\c!width=\v!fit,
+ \c!height=\v!fit,
+ \c!distance=1em,
+ \c!location=\v!bottom, % can be something {top,left}
+ \c!before=\blank,
+ \c!inbetween={\blank[\v!medium]},
+ \c!style=,
+ \c!color=,
+ \c!after=,
+ \c!align=\v!middle]
+
+%D \macros
+%D {startfloatcombination}
+%D
+%D \setupexternalfigures[directory={../sample}]
+%D \startbuffer
+%D \placefigure
+%D [left,none]
+%D {}
+%D {\startfloatcombination[2*2]
+%D \placefigure{alpha}{\externalfigure[cow.pdf][width=1cm]}
+%D \placefigure{beta} {\externalfigure[cow.pdf][width=2cm]}
+%D \placefigure{gamma}{\externalfigure[cow.pdf][width=3cm]}
+%D \placefigure{delta}{\externalfigure[cow.pdf][width=4cm]}
+%D \stopfloatcombination}
+%D
+%D \input tufte
+%D \stopbuffer
+%D
+%D \typebuffer \getbuffer
+
+\def\startfloatcombination
+ {\dodoubleempty\dostartfloatcombination}
+
+\def\dostartfloatcombination[#1][#2]%
+ {\vbox\bgroup
+ %\insidecolumnstrue % trick, forces no centering, todo: proper switch/feature
+ \chardef\postcenterfloatmethod\zerocount
+ \forcelocalfloats
+ \def\stopfloatcombination
+ {\scratchtoks\emptytoks
+ \dorecurse\noflocalfloats
+ {\appendetoks{\noexpand\getlocalfloat{\recurselevel}}{}\to\scratchtoks}%
+ \expanded{\startcombination[#1]\the\scratchtoks}\stopcombination
+ \resetlocalfloats
+ \egroup}}
+
+\def\placerelativetoeachother#1#2%
+ {\bgroup
+ \dowithnextbox
+ {\bgroup
+ \setbox0\box\nextbox
+ \dowithnextbox
+ {\setbox2\box\nextbox
+ #1{#2#########2\cr\box0\cr\box2\cr}
+ \egroup
+ \egroup}
+ \hbox}
+ \hbox}
+
+\def\placeontopofeachother{\placerelativetoeachother\halign\hss}
+\def\placesidebyside {\placerelativetoeachother\valign\vss}
+
+% this will be replaced or go away, never used
+
+\def\douseexternalfiles[#1][#2]%
+ {\getparameters
+ [\??fi#1]
+ [\c!file=,
+ \c!bodyfont=,
+ \c!option=,
+ #2]}
+
+\def\useexternalfiles
+ {\dodoubleargument\douseexternalfiles}
+
+\def\dostelexternefilesin[#1][#2]%
+ {\doifundefinedelse{\??fi#1\c!file}
+ {\useexternalfiles[#1][#2]}
+ {\getparameters[\??fi#1][#2]}}
+
+\def\stelexternefilesin
+ {\dodoubleargument\dostelexternefilesin}
+
+\def\verwerkexternefile#1#2#3%
+ {\bgroup
+ \getparameters[\??fi#1][\c!file=,#3]%
+ \doinputonce{\getvalue{\??fi#1\c!file}}%
+ \ExpandFirstAfter\switchtobodyfont[\getvalue{\??fi#1\c!bodyfont}]%
+ \readsysfile{#2} % beter: loc of fix gebied
+ \donothing
+ {\showmessage\m!systems{41}{#2,#1}}%
+ \egroup}
+
+\def\douseexternalfile[#1][#2][#3][#4]%
+ {\stelexternefilesin[#1][]%
+ \doinputonce{\getvalue{\??fi#1\c!file}}%
+ \doifelsenothing{#2}
+ {\setvalue{#3}{\verwerkexternefile{#1}{#3}{#4}}}
+ {\setvalue{#2}{\verwerkexternefile{#1}{#3}{#4}}}}
+
+\def\useexternalfile
+ {\doquadrupleargument\douseexternalfile}
+
+\useexternalfiles
+ [pictex]
+ [\c!bodyfont=\v!small,
+ \c!file=pictex]
+
+\useexternalfiles
+ [table]
+ [\c!file=table]
+
+%D A couple of examples, demonstrating how the depth is
+%D taken care of:
+%D
+%D \startbuffer
+%D test\rotate[frame=on, rotation=0] {gans}%
+%D test\rotate[frame=on, rotation=90] {gans}%
+%D test\rotate[frame=on, rotation=180]{gans}%
+%D test\rotate[frame=on, rotation=270]{gans}%
+%D test
+%D \stopbuffer
+%D
+%D \typebuffer \getbuffer
+
+% When we rotate over arbitrary angles, we need to relocate the
+% resulting box because rotation brings that box onto the negative
+% axis. The calculations (mostly sin and cosine) need to be tuned for
+% the way a box is packages (i.e. the refence point). A typical example
+% of drawing, scribbling, and going back to the days of school math.
+%
+% We do a bit more calculations than needed, simply because that way
+% it's easier to debug the code.
+
+\def\dododorotatenextbox
+ {\setbox\nextbox\vbox to \@@layerysiz
+ {\vfill
+ \hbox to \@@layerxsiz
+ {\dostartrotation\@@rorotation
+ \nextboxwd\zeropoint
+ \nextboxht\zeropoint
+ \flushnextbox
+ \dostoprotation
+ \hfill}%
+ \kern\@@layerypos}%
+ \setbox\nextbox\hbox
+ {\kern\@@layerxpos
+ \kern\@@layerxoff
+ \lower\@@layeryoff\flushnextbox}}
+
+\def\dodorotatenextbox#1#2% quite some trial and error -)
+ {\dontshowcomposition
+ \dontcomplain
+ \ifnum#2=\plusfour
+ % new, location=middle
+ \!!widthb \nextboxwd
+ \!!heightb\nextboxht
+ \!!depthb \nextboxdp
+ \setbox\nextbox\vbox{\vskip.5\nextboxht\hskip-.5\nextboxwd\flushnextbox}%
+ \smashbox\nextbox
+ \fi
+ \!!widtha \nextboxwd
+ \!!heighta\nextboxht
+ \!!deptha \nextboxdp
+ \!!doneafalse
+ \!!donebfalse
+ \ifcase#2\or
+ % 1: fit
+ \or
+ % 2: depth, not fit
+ \!!doneatrue
+ \!!donebtrue
+ \or
+ % 3: depth, fit
+ \!!donebtrue
+ \fi
+ \setbox\nextbox\vbox{\hbox{\raise\nextboxdp\flushnextbox}}%
+ \!!dimena \nextboxht
+ \setcalculatedcos\cos\@@rorotation
+ \setcalculatedsin\sin\@@rorotation
+ \@@layerxpos\zeropoint
+ \@@layerypos\zeropoint
+ \@@layerxoff\zeropoint
+ \@@layeryoff\zeropoint
+ \ifdim\sin\points>\zeropoint
+ \ifdim\cos\points>\zeropoint
+ \@@layerxsiz \cos\!!widtha
+ \@@layerysiz \sin\!!widtha
+ \advance\@@layerxsiz \sin\!!dimena
+ \advance\@@layerysiz \cos\!!dimena
+ \@@layerypos \cos\!!dimena
+ \if!!donea
+ \@@layerxoff \negated\sin\!!dimena
+ \advance\@@layerxoff \sin\!!deptha
+ \fi
+ \if!!doneb
+ \@@layeryoff \cos\!!deptha
+ \fi
+ \dododorotatenextbox
+ \else
+ \@@layerxsiz \negated\cos\!!widtha
+ \@@layerysiz \sin\!!widtha
+ \advance\@@layerxsiz \sin\!!dimena
+ \advance\@@layerysiz \negated\cos\!!dimena
+ \@@layerxpos \negated\cos\!!widtha
+ \if!!donea
+ \@@layerxoff -\@@layerxsiz
+ \advance\@@layerxoff \sin\!!deptha
+ \fi
+ \if!!doneb
+ \@@layeryoff \negated\cos\!!heighta
+ \fi
+ \dododorotatenextbox
+ \wd\nextbox\if!!donea\sin\!!deptha\else\@@layerxsiz\fi
+ \fi
+ \else
+ \ifdim\cos\points<\zeropoint
+ \@@layerxsiz \negated\cos\!!widtha
+ \@@layerysiz \negated\sin\!!widtha
+ \advance\@@layerxsiz \negated\sin\!!dimena
+ \advance\@@layerysiz \negated\cos\!!dimena
+ \@@layerxpos \@@layerxsiz
+ \@@layerypos \negated\sin\!!widtha
+ \if!!donea
+ \@@layerxoff -\@@layerxsiz
+ \advance\@@layerxoff \negated\sin\!!heighta
+ \fi
+ \if!!doneb
+ \@@layeryoff \@@layerysiz
+ \advance\@@layeryoff \cos\!!deptha
+ \fi
+ \dododorotatenextbox
+ \wd\nextbox\if!!donea\negated\sin\!!heighta\else\@@layerxsiz\fi
+ \else
+ \@@layerxsiz \cos\!!widtha
+ \@@layerysiz \negated\sin\!!widtha
+ \advance\@@layerxsiz \negated\sin\!!dimena
+ \advance\@@layerysiz \cos\!!dimena
+ \ifdim\sin\points=\zeropoint
+ \@@layerxpos \zeropoint
+ \@@layerxoff \zeropoint
+ \@@layerypos \@@layerysiz
+ \if!!doneb
+ \@@layeryoff \!!deptha
+ \fi
+ \else
+ \@@layerypos \@@layerysiz
+ \@@layerxpos \negated\sin\!!dimena
+ \if!!donea
+ \@@layerxoff -\@@layerxsiz
+ \advance\@@layerxoff \negated\sin\!!heighta
+ \fi
+ \if!!doneb
+ \@@layeryoff \negated\sin\!!deptha
+ \fi
+ \fi
+ \dododorotatenextbox
+ \ifdim\sin\points=\zeropoint
+ \else
+ \wd\nextbox\if!!donea\negated\sin\!!heighta\else\@@layerxsiz\fi
+ \fi
+ \fi
+ \fi
+ % new, location=middle
+ \ifnum#2=\plusfour
+ \setbox\nextbox\vbox{\vskip-.5\!!heightb\hskip.5\!!heightb\flushnextbox}%
+ \nextboxwd\!!widthb
+ \nextboxht\!!heightb
+ \nextboxdp\!!depthb
+ \fi}
+
+\def\dorotatenextbox#1#2%
+ {\doifsomething{#1}
+ {\edef\@@rorotation{\realnumber{#1}}% get rid of leading zeros and spaces
+ \setbox\nextbox\vbox{\flushnextbox}% not really needed
+ \dodorotatenextbox\@@rorotation#2}%
+ \hbox{\boxcursor\flushnextbox}}
+
+\def\dodorotatebox#1% {angle} \hbox/\vbox/\vtop
+ {\bgroup\hbox\bgroup % compatibility hack
+ \dowithnextbox
+ {\dorotatenextbox{#1}\plusone
+ \egroup\egroup}}
+
+\def\dorotatebox#1% {angle} \hbox/\vbox/\vtop
+ {\ifcase#1\relax
+ \expandafter\gobbleoneargument
+ \else
+ \expandafter\dodorotatebox
+ \fi{#1}}
+
+\unexpanded\def\rotate % \bgroup: \rotate kan argument zijn
+ {\bgroup\complexorsimpleempty\rotate}
+
+% \def\complexrotate[#1]% framed met diepte !
+% {\getparameters[\??ro][#1]%
+% \processaction
+% [\@@rolocation]
+% [ \v!depth=>\!!counta\plusthree\donefalse,% depth fit - raw box
+% \v!fit=>\!!counta\plustwo \donefalse,% depth tight - raw box
+% \v!broad=>\!!counta\plusone \donefalse,% nodepth fit - raw box
+% \v!high=>\!!counta\plusone \donetrue ,% nodepth fit - framed
+% \v!middle=>\!!counta\plusfour \donefalse,% centered, keep dimensions
+% \s!default=>\!!counta\plusthree\donetrue ,% depth fit - framed
+% \s!unknown=>\!!counta\plusthree\donetrue ]% depth fit - framed
+% \ifdone
+% \def\docommand{\localframed[\??ro][#1,\c!location=]}%
+% \else
+% \let\docommand\relax
+% \fi
+% \dowithnextbox{\dorotatenextbox\@@rorotation\!!counta\egroup}\vbox\docommand}
+
+\setvalue{\??ro::\c!location::\v!depth }{\!!counta\plusthree\donefalse} % depth fit - raw box
+\setvalue{\??ro::\c!location::\v!fit }{\!!counta\plustwo \donefalse} % depth tight - raw box
+\setvalue{\??ro::\c!location::\v!broad }{\!!counta\plusone \donefalse} % nodepth fit - raw box
+\setvalue{\??ro::\c!location::\v!high }{\!!counta\plusone \donetrue } % nodepth fit - framed
+\setvalue{\??ro::\c!location::\v!middle }{\!!counta\plusfour \donefalse} % centered, keep dimensions
+\setvalue{\??ro::\c!location::\v!default}{\!!counta\plusthree\donetrue } % depth fit - framed
+
+\def\complexrotate[#1]% framed met diepte !
+ {\getparameters[\??ro][#1]%
+ \executeifdefined{\??ro::\c!location::\@@rolocation}{\!!counta\plusthree\donetrue}%
+ \ifdone
+ \def\docommand{\localframed[\??ro][#1,\c!location=]}%
+ \else
+ \let\docommand\relax
+ \fi
+ \dowithnextbox{\dorotatenextbox\@@rorotation\!!counta\egroup}\vbox\docommand}
+
+\presetlocalframed[\??ro]
+
+\def\setuprotate
+ {\dodoubleargument\getparameters[\??ro]}
+
+\setuprotate
+ [\c!rotation=90,
+ \c!location=\v!normal,
+ \c!width=\v!fit,
+ \c!height=\v!fit,
+ \c!offset=\v!overlay,
+ \c!frame=\v!off]
+
+% \dostepwiserecurse{0}{360}{10}
+% {\startlinecorrection[blank]
+% \hbox
+% {\expanded{\setuprotate[rotation=\recurselevel]}%
+% \traceboxplacementtrue
+% \hbox to .2\hsize{\hss\ruledhbox{\rotate[location=depth] {\ruledhbox{\bfb (depth)}}}}%
+% \hbox to .2\hsize{\hss\ruledhbox{\rotate[location=fit] {\ruledhbox{\bfb (fit)}}}}%
+% \hbox to .2\hsize{\hss\ruledhbox{\rotate[location=broad] {\ruledhbox{\bfb (broad)}}}}%
+% \hbox to .2\hsize{\hss\ruledhbox{\rotate[location=normal]{\ruledhbox{\bfb (normal)}}}}%
+% \hbox to .2\hsize{\hss\ruledhbox{\rotate[location=high] {\ruledhbox{\bfb (high)}}}}}
+% \stoplinecorrection}
+
+% to be used in some other places! todo!
+%
+% divides \hsize in fractions, will be made a bit more
+% clever and advanced when needed
+%
+% \horizontaldivision[n/m,elements,distance]
+%
+% \horizontaldivision[2/5,3,1em]
+% \horizontaldivision[2/5,3,1em]
+% \horizontaldivision[1/5,3,1em]
+%
+% \setuphorizontaldivision[afstand=,aantal=] (passend,passend)
+
+\def\??fr{@@fr}
+
+\def\setuphorizontaldivision
+ {\dodoubleargument\getparameters[\??fr]}
+
+\def\horizontaldivision
+ {\dosingleargument\dohorizontaldivision}
+
+\def\dohorizontaldivision[#1]%
+ {\dodohorizontaldivision[#1,,,,,,]}
+
+\def\dodohorizontaldivision[#1/#2,#3,#4,#5]%
+ {\doifelsenothing{#3}
+ {\doifelse\@@frn\v!fit
+ {\!!counta#2\relax}
+ {\!!counta\@@frn\relax}}
+ {\!!counta#3\relax}%
+ \doifelsenothing{#4}
+ {\doifelse\@@frdistance\v!fit
+ {\!!widtha\zeropoint}
+ {\!!widtha\@@frdistance}}
+ {\!!widtha#4}%
+ \advance\!!counta \minusone
+ \multiply\!!widtha \!!counta
+ \advance\hsize -\!!widtha
+ \divide\hsize #2\relax
+ \hsize#1\hsize}
+
+\setuphorizontaldivision
+ [\c!distance=\tfskipsize,
+ \c!n=\v!fit]
+
+%D This one is for Daniel Pittman, who wanted tight
+%D fractions. We show three versions. First the simple
+%D one using \type {\low} and \type {high}:
+%D
+%D \startbuffer
+%D \def\vfrac#1#2%
+%D {\hbox{\high{\tx#1\kern-.25em}/\low{\kern-.25em\tx#2}}}
+%D
+%D test \vfrac{1}{2} test \vfrac{123}{456} test
+%D \stopbuffer
+%D
+%D \typebuffer {\showmakeup\getbuffer}
+%D
+%D A better way to handle the kerning is the following, here
+%D we kind of assume that tye slash is symmetrical and has
+%D nearly zero width.
+%D
+%D \startbuffer
+%D \def\vfract#1#2%
+%D {\hbox{\high{\tx#1}\hbox to \zeropoint{\hss/\hss}\low{\tx#2}}}
+%D \stopbuffer
+%D
+%D \typebuffer {\showmakeup\getbuffer}
+%D
+%D The third and best alternative is the following:
+%D
+%D {\showmakeup\getbuffer}\crlf\getbuffer
+%D
+%D This time we measure the height of the \type {/} and
+%D shift over the maximum height and depths of this
+%D character and the fractional digits (we use 57 as
+%D sample). Here we combine all methods in one macros.
+
+\chardef\vulgarfractionmethod=3
+
+\definehspace[vulgarfraction][.25em] % [.15em]
+\definesymbol[vulgarfraction][/] % [\raise.2ex\hbox{/}]
+
+\unexpanded\def\vulgarfraction#1#2%
+ {\dontleavehmode
+ \hbox
+ {\def\vulgarfraction{vulgarfraction}%
+ \ifcase\vulgarfractionmethod
+ #1\symbol[\vulgarfraction]#2%
+ \or
+ \high{\tx#1\kern-\hspaceamount\empty\vulgarfraction}%
+ \symbol[\vulgarfraction]%
+ \low {\kern-\hspaceamount\empty\vulgarfraction\tx#2}%
+ \or
+ \high{\tx#1}%
+ \hbox to \zeropoint{\hss\symbol[\vulgarfraction]\hss}%
+ \low{\tx#2}%
+ \or
+ \setbox0\hbox{\symbol[\vulgarfraction]}%
+ \setbox2\hbox{\txx57}%
+ \raise\ht0\hbox{\lower\ht2\hbox{\txx#1}}%
+ \hbox to \zeropoint{\hss\symbol[\vulgarfraction]\hss}%
+ \lower\dp0\hbox{\raise\dp2\hbox{\txx#2}}%
+ \fi}}
+
+\ifx\vfrac\undefined \let\vfrac\vulgarfraction \fi
+
+%D \starttabulate
+%D \HL
+%D \NC \bf method \NC \bf visualization \NC\NR
+%D \HL
+%D \NC 0 \NC \chardef\vulgarfractionmethod0\vulgarfraction{1}{2} \NC\NR
+%D \NC 1 \NC \chardef\vulgarfractionmethod1\vulgarfraction{1}{2} \NC\NR
+%D \NC 2 \NC \chardef\vulgarfractionmethod2\vulgarfraction{1}{2} \NC\NR
+%D \NC 3 \NC \chardef\vulgarfractionmethod3\vulgarfraction{1}{2} \NC\NR
+%D \HL
+%D \stoptabulate
+
+%D Under construction:
+%D
+%D \starttyping
+%D \commalistsentence[aap,noot,mies]
+%D \commalistsentence[aap,noot]
+%D \commalistsentence[aap]
+%D \commalistsentence[a,b,c]
+%D \commalistsentence[a,b,c][{ \& },{ and }]
+%D \commalistsentence[a,b,c][+,-]
+%D \stoptyping
+
+\let\handlecommalistsentence\firstofoneargument
+
+\def\commalistsentenceone{and-1}
+\def\commalistsentencetwo{and-2}
+
+\def\commalistsentence
+ {\dodoubleempty\docommalistsentence}
+
+\def\docommalistsentence[#1][#2]%
+ {\bgroup
+ \getfromcommalist[#2][1]%
+ \ifx\commalistelement\empty
+ \def\@@commalistsentenceone{\labeltext\commalistsentenceone}%
+ \else
+ \let\@@commalistsentenceone\commalistelement
+ \fi
+ \getfromcommalist[#2][2]%
+ \ifx\commalistelement\empty
+ \def\@@commalistsentencetwo{\labeltext\commalistsentencetwo}%
+ \else
+ \let\@@commalistsentencetwo\commalistelement
+ \fi
+ \getcommalistsize[#1]%
+ \ifcase\commalistsize\relax
+ \def\serializedcommalist{#1}%
+ \else
+ \let\serializedcommalist\empty
+ \scratchcounter\zerocount
+ \def\docommand##1%
+ {\advance\scratchcounter \plusone
+ \ifnum\scratchcounter=\plusone
+ \scratchtoks{\handlecommalistsentence{##1}}%
+ \else
+ \ifnum\scratchcounter=\commalistsize
+ \appendtoks\@@commalistsentencetwo\handlecommalistsentence{##1}\to\scratchtoks
+ \else
+ \appendtoks\@@commalistsentenceone\handlecommalistsentence{##1}\to\scratchtoks
+ \fi
+ \fi}%
+ \processcommacommand[#1]\docommand
+ \edef\serializedcommalist{\the\scratchtoks}%
+ \fi
+ \serializedcommalist
+ \egroup}
+
+\def\commacommandsentence[#1]{\@EA\commalistsentence\@EA[#1]}
+
+\ifx\textcomma\undefined \def\textcomma{,} \fi
+
+\setuplabeltext [\s!nl] [and-1=\textcomma\ , and-2= en ]
+\setuplabeltext [\s!en] [and-1=\textcomma\ , and-2=\textcomma\ and ]
+\setuplabeltext [\s!de] [and-1=\textcomma\ , and-2= und ]
+
+%D \macros
+%D {somekindoftab}
+%D
+%D This macro can be used to create tabs:
+%D
+%D \starttyping
+%D \setupheadertexts[{\somekindoftab[alternative=horizontal]{\framed{\realfolio}}}]
+%D \setuptexttexts [{\somekindoftab[alternative=vertical] {\framed{\realfolio}}}]
+%D
+%D \starttext
+%D \showframe \dorecurse{10}{test\page}
+%D \stoptext
+%D \stoptyping
+
+\def\somekindoftab
+ {\dosingleempty\dosomekindoftab}
+
+\def\dosomekindoftab[#1]%
+ {\bgroup
+ \getparameters[xx]
+ [\c!alternative=\v!vertical,
+ \c!width=\textwidth,\c!height=\textheight,
+ \c!n=\lastpage,\c!m=\realpageno,
+ #1]%
+ \doifelse\xxalternative\v!vertical
+ {\dodosomekindoftab\vbox\vskip\xxheight}
+ {\dodosomekindoftab\hbox\hskip\xxwidth }}
+
+\def\dodosomekindoftab#1#2#3#4%
+ {#1 to #3 \bgroup
+ \forgetall
+ \ifnum\xxm>\plusone
+ #2\zeropoint \!!plus \the\numexpr\xxm -1\relax fill\relax
+ \fi
+ #4%
+ \ifnum\xxm<\xxn\relax
+ #2\zeropoint \!!plus \the\numexpr\xxn-\xxm\relax fill\relax
+ \fi
+ \egroup
+ \egroup}
+
+\protect \endinput
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-23 23:48:20 +0000