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luaotfload = { }
luaotfload.module = {
name = "luaotfload",
version = 1.001,
date = "2009/04/08",
description = "ConTeXt font loading system.",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
luatextra.provides_module(luaotfload.module)
function luaotfload.loadmodule(name)
local foundname = kpse.find_file('otfl-'..name,"tex")
if not foundname then
luatextra.module_error('luaotfload', string.format('file otfl-%s not found.', name))
return
end
dofile(foundname)
end
-- The following functions are made to map ConTeXt functions to luaextra functions.
string.strip = string.stripspaces
local splitters_s, splitters_m = { }, { }
function lpeg.splitat(separator,single)
local splitter = (single and splitters_s[separator]) or splitters_m[separator]
if not splitter then
separator = lpeg.P(separator)
if single then
local other, any = lpeg.C((1 - separator)^0), lpeg.P(1)
splitter = other * (separator * lpeg.C(any^0) + "")
splitters_s[separator] = splitter
else
local other = lpeg.C((1 - separator)^0)
splitter = other * (separator * other)^0
splitters_m[separator] = splitter
end
end
return splitter
end
file = fpath
file.extname = fpath.suffix
function table.compact(t)
if t then
for k,v in next, t do
if not next(v) then
t[k] = nil
end
end
end
end
function table.sortedhashkeys(tab) -- fast one
local srt = { }
for key,_ in next, tab do
srt[#srt+1] = key
end
table.sort(srt)
return srt
end
-- The following modules contain code that is either not used
-- at all outside ConTeXt or will fail when enabled due to
-- lack of other modules.
-- First we load a few helper modules. This is about the miminum
-- needed to let the font modules do theuir work.
luaotfload.loadmodule('luat-dum.lua') -- not used in context at all
luaotfload.loadmodule('luat-con.lua') -- maybe some day we don't need this one
-- We do need some basic node support although the following
-- modules contain a little bit of code that is not used. It's
-- not worth weeding.
luaotfload.loadmodule('node-ini.lua')
-- function to set the good attribute numbers, they are not arbitrary values
-- between 127 and 255 like in the ConTeXt base code
function attributes.private(name)
local number = tex.attributenumber['otfl@'..name]
if not number then
luatextra.module_error('luaotfload', string.format('asking for attribute %s, but not declared. Please report to the maintainer of luaotfload.', name))
end
return number
end
luaotfload.loadmodule('node-inj.lua') -- will be replaced (luatex > .50)
luaotfload.loadmodule('node-fnt.lua')
luaotfload.loadmodule('node-dum.lua')
-- Now come the font modules that deal with traditional TeX fonts
-- as well as open type fonts. We don't load the afm related code
-- from font-enc.lua and font-afm.lua as only ConTeXt deals with
-- it.
--
-- The font database file (if used at all) must be put someplace
-- visible for kpse and is not shared with ConTeXt. The mtx-fonts
-- script can be used to genate this file (using the --names
-- option).
luaotfload.loadmodule('font-ini.lua')
luaotfload.loadmodule('font-tfm.lua') -- will be split (we may need font-log)
--luaotfload.loadmodule('font-ott.lua') -- might be split
luaotfload.loadmodule('font-otf.lua')
luaotfload.loadmodule('font-otb.lua')
luaotfload.loadmodule('font-cid.lua')
luaotfload.loadmodule('font-otn.lua')
luaotfload.loadmodule('font-ota.lua') -- might be split
luaotfload.loadmodule('font-otc.lua')
do
local temp = callback.register
callback.register = function (...)
return
end
luaotfload.loadmodule('font-def.lua')
callback.register = temp
end
luaotfload.loadmodule('font-xtx.lua')
luaotfload.loadmodule('font-dum.lua')
function luaotfload.register_callbacks()
callback.add('ligaturing', nodes.simple_font_dummy, 'luaotfload.ligaturing')
callback.add('kerning', nodes.simple_font_dummy, 'luaotfload.kerning')
callback.add('pre_linebreak_filter', nodes.simple_font_handler, 'luaotfload.pre_linebreak_filter')
callback.add('hpack_filter', nodes.simple_font_handler, 'luaotfload.hpack_filter')
callback.reset('define_font')
callback.add('define_font' , fonts.define.read, 'luaotfload.define_font', 1)
end
function luaotfload.unregister_callbacks()
callback.remove('ligaturing', 'luaotfload.ligaturing')
callback.remove('kerning', 'luaotfload.kerning')
callback.remove('pre_linebreak_filter', 'luaotfload.pre_linebreak_filter')
callback.remove('hpack_filter', 'luaotfload.hpack_filter')
callback.remove('define_font', 'luaotfload.define_font')
end
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