LaTeX format for LuaMetaTeX
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% To be loaded *after* microtype
%
% Patching \pickup@font to emulate LuaTeX's font expansion interface using \adjustspacing...
\RequirePackage{microtype}% Just to ensure it isn't loaded in the wrong position. Normally this shouldn't be necessary
\def\luametalatex@@setexpansion#-#1#2#3#-\relax{%
\adjustspacingstretch #1
\adjustspacingshrink #2
\adjustspacingstep #3
}%
\newluafunction\luametalatex@@expandglyphsinfont
\protected\luadef\pdffontexpand\luametalatex@@expandglyphsinfont
\def\luametalatex@@everyjobandnow#1{\toksapp\everyjob{#1}#1}%
%
\begingroup
\catcode`\!=\catcode`\%
\catcode`\%=12
\expanded{!
\endgroup
\def\noexpand\pickup@font{!
\unexpanded\expandafter{\pickup@font
\expandafter\expandafter\expandafter\luametalatex@@setexpansion\csname pickup@font@@hook@luametalatex@microtype@\the\fontid\font@name\endcsname{-1}{-1}{-1}\relax
}!
}!
\noexpand\luametalatex@@everyjobandnow{\noexpand\directlua{!
lua.get_functions_table()[\the\luametalatex@@expandglyphsinfont] = function()
token.put_next(token.create'fontid')
local font = token.scan_integer()
local stretch = token.scan_integer()
local shrink = token.scan_integer()
local step = token.scan_integer()
token.set_macro('pickup@font@@hook@luametalatex@microtype@' .. font, string.format("{}{%i}{%i}{%i}", stretch, shrink, step), "global")
end
}}
}%