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%D \module
%D [ file=mult-aux,
%D version=2010.08.2,
%D title=\CONTEXT\ Multilingual Macros,
%D subtitle=helpers,
%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.
%D This is a subset of the \MKIV\ variant which has more comments). There
%D is no support for attributes (fonts and color). This code is mostly
%D meant for usage in modules that are backported from \MKIV.
\writestatus{loading}{ConTeXt Multilingual Macros / Helpers}
\unprotect
%D \starttyping
%D \unprotect
%D \def\????aa{@@@@aa}
%D
%D \installparameterhandler \????aa {whatever}
%D \installsetuphandler \????aa {whatever}
%D \installdefinehandler \????aa {whatever} \????aa % #3 == defaultroot
%D
%D % \installcommandhandler \????aa {whatever} \????aa
%D \protect
%D
%D % \whateverparameter \c!test
%D % \whateverparameterhash \c!test
%D % \namedwhateverparameter \mycurrentwhatever \c!test
%D % \everydefinewhatever (sets \currentwhatever)
%D % \everypresetwhatever (can be used to reset parameters as we can redefine)
%D % \everysetupwhatever (sets \currentwhatever)
%D
%D \starttext
%D \definewhatever[first] \definewhatever[second][first]
%D test: \def\currentwhatever{first} \whateverparameter{method} \par
%D \setupwhatever [method=unset] test: \def\currentwhatever{first} \whateverparameter{method} \par
%D \setupwhatever[first] [method=first] test: \def\currentwhatever{first} \whateverparameter{method} \par
%D test: \def\currentwhatever{second} \whateverparameter{method} \par
%D \setupwhatever[second][method=second] test: \def\currentwhatever{second} \whateverparameter{method} \par
%D \stoptext
%D \stoptyping
\unexpanded\def\doinstallparameterhandler#1#2#3#4#5#6#7#8#9%
{\def#3##1{\csname#4{#1#2}{##1}\endcsname}%
\def#4##1##2{\ifcsname##1##2\endcsname##1##2\else\expandafter#5\csname##1\s!parent\endcsname{##2}\fi}%
\def#5##1##2{\ifx##1\relax\s!empty\else#4{##1}{##2}\fi}%
\def#6##1##2{\csname#4{#1##1}{##2}\endcsname}%
\def#7##1{\detokenize\expandafter\expandafter\expandafter{\csname#1##1\endcsname}}% always root
\def#8{\dosetvalue{#1}}% ##1 {##2} (braces are mandate)
\def#9{\doletvalue{#1}}}% ##1 ##2
\unexpanded\def\installparameterhandler#1#2%
{%\message{\detokenize{#1}/\detokenize{#2}}%
\normalexpanded
{\doinstallparameterhandler
{\noexpand#1}% \??aa
\expandafter\noexpand\csname current#2\endcsname
\expandafter\noexpand\csname #2parameter\endcsname
\expandafter\noexpand\csname do#2parameter\endcsname
\expandafter\noexpand\csname do#2parentparameter\endcsname
\expandafter\noexpand\csname named#2parameter\endcsname
\expandafter\noexpand\csname detokenized#2parameter\endcsname
\expandafter\noexpand\csname doset#2parameter\endcsname
\expandafter\noexpand\csname dolet#2parameter\endcsname}}
\unexpanded\def\doinstallparameterhashhandler#1#2#3#4#5%
{\def#3##1{#4{#1#2}{##1}}%
\def#4##1##2{\ifcsname##1##2\endcsname##1\else\expandafter#5\csname##1\s!parent\endcsname{##2}\fi}%
\def#5##1##2{\ifx##1\relax\else#4{##1}{##2}\fi}}
\unexpanded\def\installparameterhashhandler#1#2%
{\normalexpanded
{\doinstallparameterhashhandler
{\noexpand#1}% \??aa
\expandafter\noexpand\csname current#2\endcsname
\expandafter\noexpand\csname #2parameterhash\endcsname
\expandafter\noexpand\csname do#2parameterhash\endcsname
\expandafter\noexpand\csname do#2parentparameterhash\endcsname}}
\unexpanded\def\doinstalldefinehandler#1#2#3#4#5#6#7%
{\unexpanded\def#2{\dotripleempty#5}%
\newtoks#6%
\newtoks#7%
\def#5[##1][##2][##3]% [child][parent][settings]
{\edef#4{##1}% % [child] [settings]
\the#6% predefine % [child][parent]
\ifthirdargument % [child]
\getparameters[#1#4][\s!parent=#1##2,##3]%
\else\ifsecondargument
\doifassignmentelse{##2}
{\getparameters[#1#4][\s!parent=#3,##2]}
{\getparameters[#1#4][\s!parent=#1##2]}%
\else
\getparameters[#1#4][\s!parent=#3]%
\fi\fi
\the#7}}
\unexpanded\def\installdefinehandler#1#2#3%
{\normalexpanded
{\doinstalldefinehandler
{\noexpand#1}% \??aa
\expandafter\noexpand\csname define#2\endcsname
{\noexpand#3}% root
\expandafter\noexpand\csname current#2\endcsname
\expandafter\noexpand\csname d@define#2\endcsname
\expandafter\noexpand\csname everypreset#2\endcsname
\expandafter\noexpand\csname everydefine#2\endcsname}}
\unexpanded\def\doinstallsetuphandler#1#2#3#4#5%
{\unexpanded\def#2{\dodoubleempty#4}%
\newtoks#5%
\def#4[##1][##2]% maybe helper
{\ifsecondargument
\def\docommand####1% we will have a simple one as well
{\edef#3{####1}%
\getparameters[#1#3][##2]%
\the#5}%
\processcommalist[##1]\docommand
\else
\let#3\empty
\getparameters[#1][##1]%
\the#5%
\fi}}
\unexpanded\def\installsetuphandler#1#2%
{\normalexpanded
{\doinstallsetuphandler
{\noexpand#1}% \??aa
\expandafter\noexpand\csname setup#2\endcsname
\expandafter\noexpand\csname current#2\endcsname
\expandafter\noexpand\csname d@setup#2\endcsname
\expandafter\noexpand\csname everysetup#2\endcsname}}
\unexpanded\def\installcommandhandler#1#2#3% \??self name \??parent (can be \??self)
{\installparameterhandler {#1}{#2}%
\installparameterhashhandler{#1}{#2}%
\installdefinehandler {#1}{#2}{#3}%
\installsetuphandler {#1}{#2}}
\unexpanded\def\installnamespace#1%
{\setvalue{????#1}{@@@@#1}}
\protect
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