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if not modules then modules = { } end modules ['font-xtx'] = {
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 texsprint, count = tex.sprint, tex.count
local format, concat, gmatch, match, find, lower = string.format, table.concat, string.gmatch, string.match, string.find, string.lower
local tostring, next = tostring, next
local lpegmatch = lpeg.match
local trace_defining = false trackers.register("fonts.defining", function(v) trace_defining = v end)
--[[ldx--
<p>Choosing a font by name and specififying its size is only part of the
game. In order to prevent complex commands, <l n='xetex'/> introduced
a method to pass feature information as part of the font name. At the
risk of introducing nasty parsing and compatinility problems, this
syntax was expanded over time.</p>
<p>For the sake of users who have defined fonts using that syntax, we
will support it, but we will provide additional methods as well.
Normally users will not use this direct way, but use a more abstract
interface.</p>
<p>The next one is the official one. However, in the plain
variant we need to support the crappy [] specification as
well and that does not work too well with the general design
of the specifier.</p>
--ldx]]--
local fonts = fonts
local definers = fonts.definers
local specifiers = definers.specifiers
local normalize_meanings = fonts.otf.meanings.normalize
local list = { }
fonts.define.specify.colonized_default_lookup = "file"
local function isstyle(s)
local style = string.lower(s):split("/")
for _,v in ipairs(style) do
if v == "b" then
list.style = "bold"
elseif v == "i" then
list.style = "italic"
elseif v == "bi" or v == "ib" then
list.style = "bolditalic"
elseif v:find("^s=") then
list.optsize = v:split("=")[2]
elseif v == "aat" or v == "icu" or v == "gr" then
logs.report("load font", "unsupported font option: %s", v)
elseif not v:is_empty() then
list.style = v:gsub("[^%a%d]", "")
end
end
end
fonts = fonts or { }
fonts.otf = fonts.otf or { }
local otf = fonts.otf
otf.tables = otf.tables or { }
otf.tables.defaults = {
dflt = {
"ccmp", "locl", "rlig", "liga", "clig",
"kern", "mark", "mkmk",
},
arab = {
"ccmp", "locl", "isol", "fina", "fin2",
"fin3", "medi", "med2", "init", "rlig",
"calt", "liga", "cswh", "mset", "curs",
"kern", "mark", "mkmk",
},
deva = {
"ccmp", "locl", "init", "nukt", "akhn",
"rphf", "blwf", "half", "pstf", "vatu",
"pres", "blws", "abvs", "psts", "haln",
"calt", "blwm", "abvm", "dist", "kern",
"mark", "mkmk",
},
khmr = {
"ccmp", "locl", "pref", "blwf", "abvf",
"pstf", "pres", "blws", "abvs", "psts",
"clig", "calt", "blwm", "abvm", "dist",
"kern", "mark", "mkmk",
},
thai = {
"ccmp", "locl", "liga", "kern", "mark",
"mkmk",
},
hang = {
"ccmp", "ljmo", "vjmo", "tjmo",
},
}
otf.tables.defaults.beng = otf.tables.defaults.deva
otf.tables.defaults.guru = otf.tables.defaults.deva
otf.tables.defaults.gujr = otf.tables.defaults.deva
otf.tables.defaults.orya = otf.tables.defaults.deva
otf.tables.defaults.taml = otf.tables.defaults.deva
otf.tables.defaults.telu = otf.tables.defaults.deva
otf.tables.defaults.knda = otf.tables.defaults.deva
otf.tables.defaults.mlym = otf.tables.defaults.deva
otf.tables.defaults.sinh = otf.tables.defaults.deva
otf.tables.defaults.syrc = otf.tables.defaults.arab
otf.tables.defaults.mong = otf.tables.defaults.arab
otf.tables.defaults.nko = otf.tables.defaults.arab
otf.tables.defaults.tibt = otf.tables.defaults.khmr
otf.tables.defaults.lao = otf.tables.defaults.thai
local function parse_script(script)
if otf.tables.scripts[script] then
local dflt
if otf.tables.defaults[script] then
logs.report("load font", "auto-selecting default features for script: %s", script)
dflt = otf.tables.defaults[script]
else
logs.report("load font", "auto-selecting default features for script: dflt (was %s)", script)
dflt = otf.tables.defaults["dflt"]
end
for _,v in next, dflt do
list[v] = "yes"
end
else
logs.report("load font", "unknown script: %s", script)
end
end
specifiers.colonizedpreference = "file"
local function issome () list.lookup = specifiers.colonizedpreference end
local function isfile () list.lookup = 'file' end
local function isname () list.lookup = 'name' end
local function thename(s) list.name = s end
local function issub (v) list.sub = v end
local function istrue (s) list[s] = true end
local function isfalse(s) list[s] = false end
local function iskey (k,v)
if k == "script" then
parse_script(v)
end
list[k] = v
end
local P, S, R, C = lpeg.P, lpeg.S, lpeg.R, lpeg.C
local spaces = P(" ")^0
local namespec = (1-S("/:("))^0 -- was: (1-S("/: ("))^0
local filespec = (R("az", "AZ") * P(":"))^-1 * (1-S(":("))^1
local stylespec = spaces * P("/") * (((1-P(":"))^0)/isstyle) * spaces
local filename = (P("file:")/isfile * (filespec/thename)) + (P("[") * P(true)/isname * (((1-P("]"))^0)/thename) * P("]"))
local fontname = (P("name:")/isname * (namespec/thename)) + P(true)/issome * (namespec/thename)
local sometext = (R("az","AZ","09") + S("+-."))^1
local truevalue = P("+") * spaces * (sometext/istrue)
local falsevalue = P("-") * spaces * (sometext/isfalse)
local keyvalue = P("+") + (C(sometext) * spaces * P("=") * spaces * C(sometext))/iskey
local somevalue = sometext/istrue
local subvalue = P("(") * (C(P(1-S("()"))^1)/issub) * P(")") -- for Kim
local option = spaces * (keyvalue + falsevalue + truevalue + somevalue) * spaces
local options = P(":") * spaces * (P(";")^0 * option)^0
local pattern = (filename + fontname) * subvalue^0 * stylespec^0 * options^0
local function colonized(specification) -- xetex mode
list = { }
lpegmatch(pattern,specification.specification)
if list.style then
specification.style = list.style
list.style = nil
end
if list.optsize then
specification.optsize = list.optsize
list.optsize = nil
end
if list.name then
if resolvers.find_file(list.name, "tfm") then
list.lookup = "file"
list.name = file.addsuffix(list.name, "tfm")
elseif resolvers.find_file(list.name, "ofm") then
list.lookup = "file"
list.name = file.addsuffix(list.name, "ofm")
end
specification.name = list.name
list.name = nil
end
if list.lookup then
specification.lookup = list.lookup
list.lookup = nil
end
if list.sub then
specification.sub = list.sub
list.sub = nil
end
-- specification.features.normal = list
specification.features.normal = normalize_meanings(list)
return specification
end
definers.registersplit(":",colonized)
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