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%D \module
%D [ file=prop-ini,
%D version=2003.04.20,
%D title=\CONTEXT\ Property Macros,
%D subtitle=Initialization,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\writestatus{loading}{ConTeXt Property Macros / Initialization}
%D This module is replaced by dedicated mechanisms. Originally properties were
%D a sort of attributes in \MKII, but now we do things different anyway. We keep
%D a surrogate mechanism around for compatibility reasons but even this will
%D become obsolete some day.
\unprotect
\installcorenamespace{propertytypes}
\installcorenamespace{propertydefiners}
\installcorenamespace{propertystarters}
\def\properties_obsolete_message
{\writestatus\m!system{properties are obsolete, use dedicated commands}%
\glet\properties_obsolete_message\donothing}
\setvalue{\??propertydefiners\v!layer }[#1][#2][#3]{\defineviewerlayer[#1][#3]}
\setvalue{\??propertydefiners\s!effect }[#1][#2][#3]{\defineeffect [#1][#3]}
\setvalue{\??propertydefiners\v!negative}[#1][#2][#3]{}
\unexpanded\def\defineproperty
{\dotripleempty\properties_define}
\def\properties_define[#1][#2][#3]%
{\properties_obsolete_message
\setevalue{\??propertytypes#1}{#2}%
\getvalue{\??propertydefiners#2}[#1][#2][#3]}
\setvalue{\??propertystarters\v!layer }#1{\let\properties_stop\stopviewerlayer\startviewerlayer[#1]}
\setvalue{\??propertystarters\s!effect }#1{\let\properties_stop\stopeffect \starteffect [#1]}
\setvalue{\??propertystarters\v!negative}#1{\let\properties_stop\stopnegative \startnegative }
\unexpanded\def\property[#1]%
{\groupedcommand{\properties_start{#1}}\properties_stop}
\unexpanded\def\startproperty[#1]%
{\properties_start{#1}}
\unexpanded\def\stopproperty
{\properties_stop}
\unexpanded\def\properties_start#1%
{\pushmacro\properties_stop
\getvalue{\??propertystarters\getvalue{\??propertytypes#1}}{#1}}
\unexpanded\def\properties_stop
{\properties_stop
\popmacro\properties_stop}
\protect \endinput
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