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if not modules then modules = { } end modules ['symb-emj'] = {
version = 1.001,
comment = "companion to symb-emj.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local symbols = fonts.symbols
-- emoji
-- processors.hpack_filter does it all
local resolvedemoji = characters.emoji.resolve
local processfeatures = fonts.handlers.otf.featuresprocessor
local injectspacing = nodes.injections.handler
local protectglyphs = nodes.handlers.protectglyphs
local tonodes = nodes.tonodes
local currentfont = font.current
-- fast enough, no need to memoize
local glyph_code = nodes.nodecodes.glyph
local remove_node = nodes.remove
local getid = nodes.getid
local getnext = nodes.getnext
local getchar = nodes.getchar
local function removemodifiers(head)
local current = head
while current do
if getid(current) == glyph_code then
local char = getchar(current) -- using categories is too much
if char == 0x200D or (char >= 0x1F3FB and char <= 0x1F3FF) then
head, current = remove_node(head,current,true)
else
current = getnext(current)
end
else
current = getnext(current)
end
end
return head
end
-- attributes
local function checkedemoji(name,id)
local str = resolvedemoji(name)
if str then
if not id then
id = currentfont()
end
local head = tonodes(str,id,nil,nil,true) -- use current attributes
head = processfeatures(head,id,false)
if head then
head = injectspacing(head)
protectglyphs(head)
return removemodifiers(head)
end
end
end
symbols.emoji = {
resolved = resolvedemoji,
checked = checkedemoji,
}
interfaces.implement {
name = "resolvedemoji",
actions = { resolvedemoji, context.escaped },
arguments = "string",
}
interfaces.implement {
name = "checkedemoji",
actions = { checkedemoji, context },
arguments = "string",
}
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