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if not modules then modules = { } end modules ['font-map'] = {
version = 1.001,
comment = "companion to font-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local utf = unicode.utf8
local match, format, find, concat, gsub, lower = string.match, string.format, string.find, table.concat, string.gsub, string.lower
local lpegmatch = lpeg.match
local utfbyte = utf.byte
local trace_loading = false trackers.register("otf.loading", function(v) trace_loading = v end)
local trace_unimapping = false trackers.register("otf.unimapping", function(v) trace_unimapping = v end)
local report_otf = logs.reporter("fonts","otf loading")
--[[ldx--
<p>Eventually this code will disappear because map files are kind
of obsolete. Some code may move to runtime or auxiliary modules.</p>
<p>The name to unciode related code will stay of course.</p>
--ldx]]--
local fonts = fonts
fonts.map = fonts.map or { }
local function loadlumtable(filename) -- will move to font goodies
local lumname = file.replacesuffix(file.basename(filename),"lum")
local lumfile = resolvers.findfile(lumname,"map") or ""
if lumfile ~= "" and lfs.isfile(lumfile) then
if trace_loading or trace_unimapping then
report_otf("enhance: loading %s ",lumfile)
end
lumunic = dofile(lumfile)
return lumunic, lumfile
end
end
local P, R, S, C, Ct, Cc = lpeg.P, lpeg.R, lpeg.S, lpeg.C, lpeg.Ct, lpeg.Cc
local hex = R("AF","09")
local hexfour = (hex*hex*hex*hex) / function(s) return tonumber(s,16) end
local hexsix = (hex^1) / function(s) return tonumber(s,16) end
local dec = (R("09")^1) / tonumber
local period = P(".")
local unicode = P("uni") * (hexfour * (period + P(-1)) * Cc(false) + Ct(hexfour^1) * Cc(true))
local ucode = P("u") * (hexsix * (period + P(-1)) * Cc(false) + Ct(hexsix ^1) * Cc(true))
local index = P("index") * dec * Cc(false)
local parser = unicode + ucode + index
local parsers = { }
local function makenameparser(str)
if not str or str == "" then
return parser
else
local p = parsers[str]
if not p then
p = P(str) * period * dec * Cc(false)
parsers[str] = p
end
return p
end
end
--~ local parser = fonts.map.makenameparser("Japan1")
--~ local parser = fonts.map.makenameparser()
--~ local function test(str)
--~ local b, a = lpegmatch(parser,str)
--~ print((a and table.serialize(b)) or b)
--~ end
--~ test("a.sc")
--~ test("a")
--~ test("uni1234")
--~ test("uni1234.xx")
--~ test("uni12349876")
--~ test("index1234")
--~ test("Japan1.123")
local function tounicode16(unicode)
if unicode < 0x10000 then
return format("%04X",unicode)
else
return format("%04X%04X",unicode/1024+0xD800,unicode%1024+0xDC00)
end
end
local function tounicode16sequence(unicodes)
local t = { }
for l=1,#unicodes do
local unicode = unicodes[l]
if unicode < 0x10000 then
t[l] = format("%04X",unicode)
else
t[l] = format("%04X%04X",unicode/1024+0xD800,unicode%1024+0xDC00)
end
end
return concat(t)
end
--~ This is quite a bit faster but at the cost of some memory but if we
--~ do this we will also use it elsewhere so let's not follow this route
--~ now. I might use this method in the plain variant (no caching there)
--~ but then I need a flag that distinguishes between code branches.
--~
--~ local cache = { }
--~
--~ function fonts.map.tounicode16(unicode)
--~ local s = cache[unicode]
--~ if not s then
--~ if unicode < 0x10000 then
--~ s = format("%04X",unicode)
--~ else
--~ s = format("%04X%04X",unicode/1024+0xD800,unicode%1024+0xDC00)
--~ end
--~ cache[unicode] = s
--~ end
--~ return s
--~ end
fonts.map.loadlumtable = loadlumtable
fonts.map.makenameparser = makenameparser
fonts.map.tounicode16 = tounicode16
fonts.map.tounicode16sequence = tounicode16sequence
local separator = S("_.")
local other = C((1 - separator)^1)
local ligsplitter = Ct(other * (separator * other)^0)
--~ print(table.serialize(lpegmatch(ligsplitter,"this")))
--~ print(table.serialize(lpegmatch(ligsplitter,"this.that")))
--~ print(table.serialize(lpegmatch(ligsplitter,"japan1.123")))
--~ print(table.serialize(lpegmatch(ligsplitter,"such_so_more")))
--~ print(table.serialize(lpegmatch(ligsplitter,"such_so_more.that")))
fonts.map.addtounicode = function(data,filename)
local unicodes = data.luatex and data.luatex.unicodes
if not unicodes then
return
end
-- we need to move this code
unicodes['space'] = unicodes['space'] or 32
unicodes['hyphen'] = unicodes['hyphen'] or 45
unicodes['zwj'] = unicodes['zwj'] or 0x200D
unicodes['zwnj'] = unicodes['zwnj'] or 0x200C
-- the tounicode mapping is sparse and only needed for alternatives
local tounicode, originals, ns, nl, private, unknown = { }, { }, 0, 0, fonts.privateoffset, format("%04X",utfbyte("?"))
data.luatex.tounicode, data.luatex.originals = tounicode, originals
local lumunic, uparser, oparser
if false then -- will become an option
lumunic = loadlumtable(filename)
lumunic = lumunic and lumunic.tounicode
end
local cidinfo, cidnames, cidcodes = data.cidinfo
local usedmap = cidinfo and cidinfo.usedname
usedmap = usedmap and lower(usedmap)
usedmap = usedmap and fonts.cid.map[usedmap]
if usedmap then
oparser = usedmap and makenameparser(cidinfo.ordering)
cidnames = usedmap.names
cidcodes = usedmap.unicodes
end
uparser = makenameparser()
local unicodevector = fonts.enc.agl.unicodes -- loaded runtime in context
for index, glyph in next, data.glyphs do
local name, unic = glyph.name, glyph.unicode or -1 -- play safe
if unic == -1 or unic >= private or (unic >= 0xE000 and unic <= 0xF8FF) or unic == 0xFFFE or unic == 0xFFFF then
local unicode = (lumunic and lumunic[name]) or unicodevector[name]
if unicode then
originals[index], tounicode[index], ns = unicode, tounicode16(unicode), ns + 1
end
-- cidmap heuristics, beware, there is no guarantee for a match unless
-- the chain resolves
if (not unicode) and usedmap then
local foundindex = lpegmatch(oparser,name)
if foundindex then
unicode = cidcodes[foundindex] -- name to number
if unicode then
originals[index], tounicode[index], ns = unicode, tounicode16(unicode), ns + 1
else
local reference = cidnames[foundindex] -- number to name
if reference then
local foundindex = lpegmatch(oparser,reference)
if foundindex then
unicode = cidcodes[foundindex]
if unicode then
originals[index], tounicode[index], ns = unicode, tounicode16(unicode), ns + 1
end
end
if not unicode then
local foundcodes, multiple = lpegmatch(uparser,reference)
if foundcodes then
if multiple then
originals[index], tounicode[index], nl, unicode = foundcodes, tounicode16sequence(foundcodes), nl + 1, true
else
originals[index], tounicode[index], ns, unicode = foundcodes, tounicode16(foundcodes), ns + 1, foundcodes
end
end
end
end
end
end
end
-- a.whatever or a_b_c.whatever or a_b_c (no numbers)
if not unicode then
local split = lpegmatch(ligsplitter,name)
local nplit = (split and #split) or 0
if nplit == 0 then
-- skip
elseif nplit == 1 then
local base = split[1]
unicode = unicodes[base] or unicodevector[base]
if unicode then
if type(unicode) == "table" then
unicode = unicode[1]
end
originals[index], tounicode[index], ns = unicode, tounicode16(unicode), ns + 1
end
else
local t, n = { }, 0
for l=1,nplit do
local base = split[l]
local u = unicodes[base] or unicodevector[base]
if not u then
break
elseif type(u) == "table" then
n = n + 1
t[n] = u[1]
else
n = n + 1
t[n] = u
end
end
if n == 0 then -- done then
-- nothing
elseif n == 1 then
originals[index], tounicode[index], nl, unicode = t[1], tounicode16(t[1]), nl + 1, true
else
originals[index], tounicode[index], nl, unicode = t, tounicode16sequence(t), nl + 1, true
end
end
end
-- last resort
if not unicode then
local foundcodes, multiple = lpegmatch(uparser,name)
if foundcodes then
if multiple then
originals[index], tounicode[index], nl, unicode = foundcodes, tounicode16sequence(foundcodes), nl + 1, true
else
originals[index], tounicode[index], ns, unicode = foundcodes, tounicode16(foundcodes), ns + 1, foundcodes
end
end
end
if not unicode then
originals[index], tounicode[index] = 0xFFFD, "FFFD"
end
end
end
if trace_unimapping then
for index, glyph in table.sortedhash(data.glyphs) do
local toun, name, unic = tounicode[index], glyph.name, glyph.unicode or -1 -- play safe
if toun then
report_otf("internal: 0x%05X, name: %s, unicode: 0x%05X, tounicode: %s",index,name,unic,toun)
else
report_otf("internal: 0x%05X, name: %s, unicode: 0x%05X",index,name,unic)
end
end
end
if trace_loading and (ns > 0 or nl > 0) then
report_otf("enhance: %s tounicode entries added (%s ligatures)",nl+ns, ns)
end
end
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