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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 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.
% todo : missing only, force always, multiple fallbacks with test, scale
% beware : only english key/values
%
% \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]
%
% \definefontfeature [emboldened] [effect={width=0.1,delta=0.4,factor=0.3}]
% \definefontsynonym [SansEmboldened] [Sans] [features=emboldened]
% \definefontfallback[FakeSansCaps] [SansEmboldened] [0x0000-0xFFFF] [rscale=.8,method=uppercase]
% \definefontsynonym [SansCaps] [file:MyriadPro-Regular.otf] [fallbacks=FakeSansCaps]
\writestatus{loading}{ConTeXt Font Macros / Collections}
\registerctxluafile{font-col}{autosuffix}
\unprotect
\permanent\tolerant\protected\def\definefontfallback[#name]#spacer[#font]#spacer[#ranges]#spacer[#settings]%
{\let\mathsizesuffix\relax
\clf_fontcollectiondefine{#name}{#font}{#ranges}{#settings}%
\lettonothing\mathsizesuffix}
\permanent\tolerant\protected\def\resetfontfallback[#name]#spacer[#font]%
{\clf_fontcollectionreset{#name}{#font}}
\def\font_fallbacks_prepare#name%
{\clf_fontcollectionprepare{#name}} % add fallbacks to last font
% we might as well move the handling to lua but then we need to pass the
% fallbacks, skewchar etc.
\newconditional\c_font_fallbacks_in_progress
\def\font_fallbacks_prepare_indeed#fallbacks%
{\begingroup
\settrue\c_font_fallbacks_in_progress
\lastrawfontcall % sets current font id
\font_fallbacks_prepare#fallbacks%
\endgroup}
\lettonothing\m_font_fallbacks % set in the font-ini
\appendtoks
\ifconditional\c_font_fallbacks_in_progress\else
\ifempty\m_font_fallbacks
\ifempty\m_font_class_fallbacks\else
\font_fallbacks_prepare_indeed\m_font_class_fallbacks
\fi
\else
\font_fallbacks_prepare_indeed\m_font_fallbacks
\fi
\fi
\to\everydefinefont
\lettonothing\m_font_fallbacks_spec
\def\font_fallbacks_start_cloning
{\begingroup
\let\m_font_fallbacks_spec\somefontspec}
\def\font_fallbacks_stop_cloning
{\endgroup}
\def\font_fallbacks_clone_unique#specification#scale% kind of dododefinefont
{\clf_fontcollectionreport{defining #specification (relative scale: #scale)}% brrr
\setfalse\c_font_auto_size
\let\lastfontidentifier\s!dummy
\def\v_font_size_relative{#scale}%
\let\v_font_size_absolute\fontbody
\font_helpers_low_level_define{#specification}\v_font_identifier_basic
\csname\v_font_identifier_basic\endcsname
\setfalse\c_font_auto_size} % no \setfontcharacteristics and \the\everyfontswitch needed
\def\font_fallbacks_clone_inherited#font% also a second argument
{\font_fallbacks_clone_unique{#font \m_font_fallbacks_spec}}
\def\font_fallbacks_register_main #name{\clf_fontcollectionregister{#name}}
\def\font_fallbacks_prepare_clone_vectors#name{\clf_fontcollectionclone{#name}}
% math (experiment, todo clf_)
% \def\font_fallbacks_register_math#1#2#3#4%
% {\doifelsenothing{#3}%
% {\definedfont[#2 at #4\scaledpoint]}%
% {\definedfont[#2*#3\space at #4\scaledpoint]}%
% \clf_registerfontfallbackid#1\space\fontid\font\space{#2}}
% % % \def\font_fallbacks_register_math#1#2#3#4%
% % % {\definedfont[#2\iftok{#3}\emptytoks\else*#3 \fi at #4\scaledpoint]%
% % % \clf_registerfontfallbackid#1\space\fontid\font\space{#2}}
% % %
% % % \def\font_fallbacks_finish_math
% % % {\ctxlua{mathematics.finishfallbacks()}}
% 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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