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\starttexdefinition OneMathSample #1#2
\startcontent
\switchtobodyfont[#1]
\framed[align=middle,offset=2ex,corner=round,rulethickness=1pt,framecolor=darkred] \bgroup
\getbuffer[#2]%
\blank[back]
\egroup
\stopcontent
\startcaption
\tt\tfb\color[darkred]{#1}
\stopcaption
\stoptexdefinition
\startluacode
local default = {
"cambria",
"modern",
-- "modernlatin",
"dejavu",
"pagella",
"termes",
"bonum",
"schola",
"lucidadk",
-- "xits",
"stixtwo",
"libertinus",
"ebgaramond",
"kpfonts",
-- "minion",
-- "asana"
}
function document.MathSamples(list,samples)
list = string.strip(list)
samples = string.strip(samples)
local s = list ~= "" and utilities.parsers.settings_to_array(list) or default
local n = #s
if s[n] == "" then
n = n - 1
end
local m = n % 4
local x = 4
local y = n // 4
if m > 0 then
x = x + 1
end
-- for i=1,n do
-- context.usebodyfont { s[i] }
-- end
-- context.startTEXpage { offset = "2ex" }
context.startcombination { nx = x, ny = y, location = "top", distance = "2ex", after = "\\blank[2*big]" }
for i=1,n do
context.OneMathSample(s[i],samples)
end
context.stopcombination()
-- context.stopTEXpage()
end
\stopluacode
\protected\def\MathSamples[#1]#*[#2]%
{\ctxlua{document.MathSamples("#1","#2")}}
\def\DoShowNextBox
{\begingroup
\dowithnextbox
{\showboxinbuffer{mathbox}\nextbox\plusone
\midaligned{\framed{\box\nextbox}}%
\switchtobodyfont[4pt]
\typebuffer[mathbox][option=TEX]%
\endgroup
\endgroup}%
\hbox}
\protected\def\StartShowBox
{\begingroup
\protected\def\StopShowBox{\removeunwantedspaces\egroup}%
\DoShowNextBox
\bgroup\ignorespaces}
\protected\def\ShowBox
{\begingroup
\DoShowNextBox}
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