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%D \module
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%D   [       file=typo-fkr,
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%D        version=2016.10.10,
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%D          title=\CONTEXT\ Typesetting Macros,
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%D       subtitle=Additional Font Kerning,
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%D         author=Hans Hagen,
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%D           date=\currentdate,
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%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
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%C
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%C This module is part of the \CONTEXT\ macro||package and is
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%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
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%C details.
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\writestatus
{
loading
}{
ConTeXt
 
Typesetting
 
Macros
 
/
 
Additional
 
Font
 
Kerning
}
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\registerctxluafile
{
typo
-
fkr
}{}
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\definesystemattribute
[
extrafontkern
][
public
]
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\unprotect
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% none  : not across fonts (but still within)
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% min   : min value across fonts
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% max   : max value across fonts
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% mixed : mean value across fonts
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% reset : disable
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\unexpanded
\def
\setextrafontkerns
[#
1
]
%
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{
\clf_setextrafontkerns
{
#
1
}}
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\unexpanded
\def
\resetextrafontkerns
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{
\c_attr_extrafontkern
\attributeunsetvalue
}
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\appendtoks
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\resetextrafontkerns
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\to
 
\everyresettypesetting
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\protect
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