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%D \module
%D [ file=font-sty,
%D version=2011.01.13, % (copied fron font-ini)
%D title=\CONTEXT\ Font Macros,
%D subtitle=features,
%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 Font Macros / Features}
\unprotect
%D Feature management.
%D
%D \starttyping
%D \definefontfeature[smallcaps][smcp=yes,script=latn]
%D \definefontfeature[smallcaps][SmallCapitals=yes,script=latn]
%D \definefontfeature[smallcaps][Small Capitals=yes,script=latn]
%D \definefontfeature[smallcaps][small capitals=yes,script=latn]
%D \definefontfeature[smallcaps][smallcapitals=yes,script=latn]
%D
%D \definedfont[cambria*smallcaps] test
%D
%D \starttext
%D \definefontfeature[basekerned][default][mode=base]
%D \definefontfeature[nodekerned][default][mode=node]
%D \definefontfeature[nonekerned][default][mode=base,kern=no]
%D \setupcolors[state=start]
%D \startoverlay
%D {\vbox{\red \definedfont[Serif*nonekerned at 12pt]\input tufte }}
%D {\vbox{\blue \definedfont[Serif*basekerned at 12pt]\input tufte }}
%D {\vbox{\green\definedfont[Serif*nodekerned at 12pt]\input tufte }}
%D \stopoverlay
%D \stoptext
%D
%D \enabletrackers[otf.kerns]
%D
%D \definefontfeature[withkern][default][mode=node]
%D \definefontfeature[nokern] [default][mode=node,kern=no]
%D \definefontfeature[single] [default][mode=node,cpsp=yes]
%D \definefontfeature[simple] [default][mode=node,cpsp=yes,kern=no]
%D
%D {\definedfont[Serif*default] [FGFGFGFGFGFGFGFGFGFGFGFGFG ABCDEFGHIJKLMNOPQRSTUVWXYZ] \par}
%D {\definedfont[Serif*nokern] [FGFGFGFGFGFGFGFGFGFGFGFGFG ABCDEFGHIJKLMNOPQRSTUVWXYZ] \par}
%D {\definedfont[Serif*single] [FGFGFGFGFGFGFGFGFGFGFGFGFG ABCDEFGHIJKLMNOPQRSTUVWXYZ] \par}
%D {\definedfont[Serif*simple] [FGFGFGFGFGFGFGFGFGFGFGFGFG ABCDEFGHIJKLMNOPQRSTUVWXYZ] \par}
%D \stoptyping
% \definefontfeature[slanted] [default][slant=.25]
% \definefontfeature[stretched][default][stretch=2]
%
% \start \definedfont[SerifBold*slanted at 20pt] \ruledhbox{Test!} \stop
% \start \definedfont[SerifBold*stretched at 20pt] \ruledhbox{Test!} \stop
%
% \definefontfeature[default] [liga=yes,texligatures=yes,texquotes=yes]
% \definefontfeature[default-caps][liga=yes,texligatures=yes,texquotes=yes,smcp=yes,script=latn]
%
% \starttypescript [serif] [palatino-nova-regular] [name]
% \definefontsynonym[Serif] [palatinonova-regular][features=default]
% \definefontsynonym[SerifCaps][palatinonova-regular][features=default-caps] % also sets Serif
% \stoptypescript
%
% \starttypescript [serif] [palatino-nova-regular] [name]
% \definefontsynonym[Serif] [palatinonova-regular*default]
% \definefontsynonym[SerifCaps] [palatinonova-regular*default-caps]
% \stoptypescript
%
% \definetypeface[mainface][rm][serif][palatino-nova-regular][default] \setupbodyfont[mainface]
%
% \starttext
% ``Test'' -- --- ff fi fl \sc ``Test'' -- --- ff fi fl
% \stoptext
%
% \definefontfeature
% [default-base]
% [script=latn,language=dflt,liga=yes,kern=yes,tlig=yes,trep=yes]
% \definefontfeature
% [default-node]
% [script=latn,language=dflt,liga=yes,kern=yes,tlig=yes,trep=yes,mode=node]
% \definefontfeature
% [default-none]
% [script=latn,language=dflt,liga=yes,kern=no, tlig=yes,trep=yes]
%
% \startoverlay
% {\vtop{\color[red] {\font\test=name:lmroman12regular*default-node \test \input ward \input zapf \input linden }}}
% {\vtop{\color[green]{\font\test=name:lmroman12regular*default-base \test \input ward \input zapf \input linden }}}
% {\vtop{\color[blue] {\font\test=name:lmroman12regular*default-none \test \input ward \input zapf \input linden }}}
% \stopoverlay
%
% \blank
%
% \startoverlay
% {\vtop{\color[red] {\font\test=name:texgyrepagella*default-node \test \input ward \input zapf \input linden }}}
% {\vtop{\color[green]{\font\test=name:texgyrepagella*default-base \test \input ward \input zapf \input linden }}}
% {\vtop{\color[blue] {\font\test=name:texgyrepagella*default-none \test \input ward \input zapf \input linden }}}
% \stopoverlay
%
% \blank
%
% \startoverlay
% {\vtop{\color[red] {\font\test=name:palatinonovaregular*default-node \test \input ward \input zapf \input linden }}}
% {\vtop{\color[green]{\font\test=name:palatinonovaregular*default-base \test \input ward \input zapf \input linden }}}
% {\vtop{\color[blue] {\font\test=name:palatinonovaregular*default-none \test \input ward \input zapf \input linden }}}
% \stopoverlay
%
% \startoverlay
% {\vtop{\color[red] {\font\test=name:OfficinaSerifBookITC*default-node \test \input ward \input zapf \input linden }}}
% {\vtop{\color[green]{\font\test=name:OfficinaSerifBookITC*default-base \test \input ward \input zapf \input linden }}}
% {\vtop{\color[blue] {\font\test=name:OfficinaSerifBookITC*default-none \test \input ward \input zapf \input linden }}}
% \stopoverlay
%
% \definefontfeature[superdefault][default][compose=yes]
%
% {\font\oeps=name:lmroman10regular*default at 30pt \oeps test \char7683}
% {\font\oeps=name:lmroman10regular*superdefault at 30pt \oeps test \char7683}
\unexpanded\def\definefontfeature
{\dotripleargument\font_basics_define_font_feature}
\def\font_basics_define_font_feature[#featureset][#parent][#settings]%
{\ctxcommand{definefontfeature("#featureset","#parent","#settings")}}
\unexpanded\def\fontfeatureslist
{\dodoubleargument\font_basics_features_list}
\def\font_basics_features_list[#name][#separator]% todo: arg voor type
{\cldcommand{featurelist("#name","otf","\luaescapestring{#separator}","yes","no",true,{"number"})}}
\attribute\zerocount\zerocount % first in list, so fast match
\let\currentfeature\empty
% ! ! ! very experimental, some test code for idris advanced features ! ! !
%
% \startbuffer
% \definefontfeature[smallcaps][smallcaps][script=latn]
% \definefontfeature[oldstyle] [oldstyle] [script=latn]
%
% \definedfont[name:cambria at 15pt]
%
% Hello there {\setff{smallcaps}capped 123 \setff{oldstyle}123!} \blank
% Hello there {\addff{smallcaps}capped 123 \addff{oldstyle}123!} \blank
% Hello there {\addff{smallcaps}capped \subff{smallcaps}normal} \blank
% \stopbuffer
%
% \typebuffer \getbuffer
\unexpanded\def\featureattribute#feature{\ctxcommand{featureattribute("#feature")}}
\unexpanded\def\setfontfeature #feature{\ctxcommand{setfontfeature("#feature")}\edef\currentfeature{#feature}}
%unexpanded\def\resetfontfeature {\ctxcommand{resetfontfeature()}\let\currentfeature\empty} % initial value
\unexpanded\def\resetfontfeature {\attribute\zerocount\zerocount \let\currentfeature\empty} % initial value
\unexpanded\def\addfontfeaturetoset #feature{\ctxcommand{addfs("#feature")}} % merge
\unexpanded\def\subtractfontfeaturefromset #feature{\ctxcommand{subfs("#feature")}} % merge
\unexpanded\def\addfontfeaturetofont #feature{\ctxcommand{addff("#feature")}} % overload
\unexpanded\def\subtractfontfeaturefromfont#feature{\ctxcommand{subff("#feature")}} % overload
\let\setff\setfontfeature
\let\addfs\addfontfeaturetoset
\let\subfs\subtractfontfeaturefromset
\let\addff\addfontfeaturetofont
\let\subff\subtractfontfeaturefromfont
%D \macros
%D {os}
%D
%D In good old \TEX, the old style numerals were often taken
%D from the math fonts. No longer.
\definefontfeature
[just-os]
[mode=node,onum=yes]
%unexpanded\def\sc{\setfontfeature{smallcaps}}
\unexpanded\def\os{\setfontfeature{just-os}}
% \doifelsecurrentfonthasfeature{smcp}{YES}{NO}
% \doifelsecurrentfonthasfeature{crap}{YES}{NO}
% \doifelsecurrentfonthasfeature{kern}{YES}{NO}
\def\doifelsecurrentfonthasfeature#feature%
{\ctxcommand{doifelsecurrentfonthasfeature("#feature")}}
\protect \endinput
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