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%D \module
%D [ file=strc-num,
%D version=1997.03.31,
%D title=\CONTEXT\ Structure Macros,
%D subtitle=Numbering,
%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 Structure Macros / Numbering}
\unprotect
% Commando's ten behoeve van nummeren:
%
% \definenumber[name]
% \setupnumber[name][wijze=,blok=,tekst=,plaats=,conversie=,start=]
% \setnumber[name]{value}
% \resetnumber[name]
% \incrementnumber[name]
% \decrementnumber[name]
% \convertednumber[name] % getnumber
% \savenumber[name]
% \restorenumber[name]
% \convertednumber[name]
% \rawnumber[name]
% private (defined in core-des.tex)
%
% \nextnumber[name][tag][reference]
% \currentnumber[name]
\def\@@thenumber#1{\s!number\csname\s!number#1\c!number\endcsname}
% this will be the new (public) one: \let\numberparameterprefix\@@thenumber
\def\numberparameter#1#2{\csname\@@thenumber{#1}#2\endcsname} % sort of public
\def\dosetupnumber[#1][#2]%
{\@EA\let\@EA\savedstartnumber\csname\@@thenumber{#1}\c!start\endcsname
\getparameters[\@@thenumber{#1}][\c!start=,#2]%
\doifelsenothing{\numberparameter{#1}\c!start}
{\letvalue{\@@thenumber{#1}\c!start}\savedstartnumber}
{\setcounter{\@@thenumber{#1}}{\numberparameter{#1}\c!start}}}
\def\setupnumber
{\dodoubleargument\dosetupnumber}
\def\definenumber
{\dodoubleempty\dodefinenumber}
\def\dodefinenumber[#1][#2]% ook overal class als localframed
{\doifassignmentelse{#2}
{\dododefinenumber[#1][#2]}
{\doifelsenothing{#2} % can break on not yet defined macros in #2
{\dododefinenumber[#1][#2]}
{\setvalue{\s!number#1\c!number}{#2}}}}
\def\dododefinenumber[#1][#2]%
{\getparameters
[\s!number#1]
[\c!number=#1,
\s!check=,
\c!way=\@@nrway,
\c!way\c!local=\numberparameter{#1}\c!way,
\c!sectionnumber=\v!yes,
\c!text=, % no longer used here, will go away
\c!location=, % no longer used here, will go away (was ooit \c!zetwijze)
\c!conversion=\v!numbers,
\c!start=0,
\c!state=\v!start,
#2]%
\makecounter{\@@thenumber{#1}}%
\setxvalue{\@@thenumber{#1}\c!n}{\countervalue{\@@thenumber{#1}}}%
\setcounter{\@@thenumber{#1}}{\numberparameter{#1}\c!start}}
\def\setnumber[#1]#2%
{\setcounter{\@@thenumber{#1}}{#2}}
\def\resetnumber[#1]%
{\setcounter{\@@thenumber{#1}}{0\numberparameter{#1}\c!start}}
\def\savenumber[#1]%
{\savecounter{\@@thenumber{#1}}}
\def\restorenumber[#1]%
{\restorecounter{\@@thenumber{#1}}}
%D Bonus macro (we need to keep this one for downward
%D compatibility reasons).
\def\doreset[#1]%
{\processcommalist[#1]\dodoreset}
\def\dodoreset#1%
{\getvalue{\s!reset#1}}%
\def\reset
{\dosingleargument\doreset}
\def\incrementnumber[#1]% bypage tricky: needs a
{\doifelse{\numberparameter{#1}\c!way}{\v!by\v!page}
{\checkpagechange{#1}%
\ifpagechanged\resetcounter{\@@thenumber{#1}}\fi}
{\checknumber[#1]}%
\doifelse\@@nrstate\v!start % only here
{\doif{\numberparameter{#1}\c!state}\v!start{\pluscounter{\@@thenumber{#1}}}}
{\setcounter{\@@thenumber{#1}}{0\numberparameter{#1}\c!start}}}
% \defineenumeration [test] [way=bypage,text=\lastchangedpage]
%
% \starttext \dorecurse{10}{\test \input tufte \par} \stoptext
\def\decrementnumber[#1]%
{\minuscounter{\@@thenumber{#1}}}
\def\convertednumber[#1]%
{\convertnumber
{\numberparameter{#1}\c!conversion}
{\countervalue{\@@thenumber{#1}}}}
\def\rawnumber[#1]%
{\countervalue{\@@thenumber{#1}}}
\def\accumulatednumber[#1]%
{\getvalue{\@@thenumber{#1}\c!n}}
\let\getnumber\convertednumber
\def\doifdefinednumber #1{\doifdefined {\csname\s!number#1\c!number\endcsname}}
\def\doifundefinednumber #1{\doifundefined {\csname\s!number#1\c!number\endcsname}}
\def\doifdefinednumberelse#1{\doifdefinedelse{\csname\s!number#1\c!number\endcsname}}
\ifx\checknumber\undefined \def\checknumber[#1]{} \fi
% ook de pag nummers hierheen halen ivm \@@nrwijze
\def\setupnumbering
{\dodoubleempty\getparameters[\??nr]}
\setupnumbering
[\c!way=\v!by\v!chapter,
\c!blockway=,
\c!sectionnumber=\v!yes,
\c!state=\v!start]
\protect \endinput
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