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%D \module
%D [ file=font-col,
%D version=2008.06.11,
%D title=\CONTEXT\ Font Macros,
%D subtitle=Fallbacks (collections),
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright=PRAGMA]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
% ! EXPERIMENTAL ! code will be made more nice
%
% actually we can now do more at the lua end
% todo: missing only, force always, multiple fallbacks with test, scale
%
% \resetfontfallback [whatever]
%
% \definefontfallback [whatever] [Slanted] [0x0060-0x007F] [force=yes]
% \definefontfallback [whatever] [Bold] [0x0080-0x00FF,0x00A0-0x00AF] [rscale=1.2]
% \definefontfallback [whatever] [BoldSlanted] [0x00C0-0x00C7] [check=yes,force=yes]
\writestatus{loading}{ConTeXt Font Macros / Collections}
\registerctxluafile{font-col}{1.001}
\unprotect
\unexpanded\def\definefontfallback
{\doquadrupleempty\dodefinefontfallback}
\def\dodefinefontfallback[#1][#2][#3][#4]%
{\ctxlua{fonts.collections.define("#1","#2",\!!bs#3\!!es,\!!bs#4\!!es)}}
\def\resetfontfallback
{\dodoubleempty\doresetfontfallback}
\def\doresetfontfallback[#1][#2]%
{\ctxlua{fonts.collections.reset("#1","#2")}}
% add fallbacks to last font
\def\dodefinefontfallbacks#1%
{\ctxlua{fonts.collections.prepare("#1")}}
% we might as well move the handling to lua but then we need to pass the
% fallbacks, skewchar etc.
\setfalse\doingfontfallbacks
\def\dodefinefontfallbacksindeed#1%
{\begingroup
\settrue\doingfontfallbacks
\lastrawfontcall % sets current font id
\dodefinefontfallbacks#1%
\endgroup}
\appendtoks
\ifconditional\doingfontfallbacks\else
\ifx\@@fontfallbacks\empty
\ifx\@@fontclassfallbacks\empty
\else
\dodefinefontfallbacksindeed\@@fontclassfallbacks
\fi
\else
\dodefinefontfallbacksindeed\@@fontfallbacks
\fi
\fi
\to\everydefinefont
\def\dostartcloningfonts
{\bgroup
\let\savedfontspec\somefontspec}
\def\dostopcloningfonts
{\egroup}
\def\doclonefonta#1#2% kind of dododefinefont
{\ctxlua{fonts.collections.message("defining #1 (relative scale: #2)")}% brrr
\autofontsizefalse
\let\lastfontidentifier\s!dummy
\def\localrelativefontsize{#2}%
\let\localabsolutefontsize\fontbody
\lowleveldefinefont{#1}\rawfontidentifier
\csname\rawfontidentifier\endcsname
\autofontsizefalse
%\setfontcharacteristics
}%\the\everyfontswitch}
\def\doclonefontb#1% #2
{\doclonefonta{#1 \savedfontspec}}
\def\doclonefontstageone#1%
{\ctxlua{fonts.collections.stage_one("#1")}}
\def\doclonefontstagetwo#1%
{\ctxlua{fonts.collections.stage_two("#1")}}
% check : only replace when present in replacement font (default: no)
% force : force replacent even when basefont has glyph (default: yes)
% \definefontfallback [whatever] [Slanted] [0x0060-0x007F] [force=yes]
% \definefontfallback [whatever] [Bold] [0x0080:0x00FF,0x00A0:0x00AF] [rscale=2.0]
% \definefontfallback [whatever] [BoldSlanted] ["00C0-"00C7] [check=yes,force=yes]
% \definefontfallback [whatever] [Mono] [latinextendeda] [force=yes] % 0x0100:0x017F
% \definefontfallback [whatever] [Mono] [latin extended a] [force=yes] % 0x0100:0x017F
%
% \definefontsynonym[SerifPlus][Serif][fallbacks=whatever]
%
% \showfont[SerifPlus][all]
% \definefontfeature[zh][mode=node,script=hang,lang=zhs]
% \definefontfallback[serifwhatever] [lmroman10-regular] [0x0000-0x0400][force=yes]
% \definefontfallback[serifboldwhatever] [lmroman10-bold] [0x0000-0x0400][force=yes]
% \definefontfallback[serifitalicwhatever] [lmroman10-italic] [0x0000-0x0400][force=yes]
% \definefontfallback[serifbolditalicwhatever][lmroman10-bolditalic][0x0000-0x0400][force=yes]
%
% \starttypescript [serif] [zhfont]
% \definefontsynonym [zhserif] [AdobeSongStd-Light] [features=zh,fallbacks=serifwhatever]
% \definefontsynonym [zhserifbold] [AdobeHeitiStd-Regular][features=zh,fallbacks=serifboldwhatever]
% \definefontsynonym [zhserifitalic] [AdobeKaitiStd-Regular][features=zh,fallbacks=serifitalicwhatever]
% \definefontsynonym [zhserifbolditalic][AdobeHeitiStd-Regular][features=zh,fallbacks=serifbolditalicwhatever]
% \stoptypescript
%
% \starttypescript [serif][zhfont][name]
% \definefontsynonym[Serif] [zhserif] % [fallbacks=serifwhatever]
% \definefontsynonym[SerifBold] [zhserifbold] % [fallbacks=serifboldwhatever]
% \definefontsynonym[SerifItalic] [zhserifitalic] % [fallbacks=serifitalicwhatever]
% \definefontsynonym[SerifBoldItalic] [zhserifbolditalic] % [fallbacks=serifbolditalicwhatever]
% \stoptypescript
%
% \starttypescript[myfont]
% \definetypeface[myfont][rm][serif][zhfont]
% \stoptypescript
%
% \usetypescript[myfont] \setupbodyfont[myfont,rm,12pt]
%
% \starttext
% fonts {\bf fonts} {\bi fonts} {\it fonts}
% \stoptext
\protect \endinput
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