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if not modules then modules = { } end modules ['luatex-fonts'] = {
version = 1.001,
comment = "companion to luatex-fonts.tex",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- The following code isolates the generic context code from already defined or to be defined
-- namespaces. This is the reference loader for plain, but the generic code is also used in
-- luaotfload (which is is a file meant for latex) and that used to be maintained by Khaled
-- Hosny. We do our best to keep the interface as clean as possible.
--
-- The code base is rather stable now, especially if you stay away from the non generic code. All
-- relevant data is organized in tables within the main table of a font instance. There are a few
-- places where in context other code is plugged in, but this does not affect the core code. Users
-- can (given that their macro package provides this option) access the font data (characters,
-- descriptions, properties, parameters, etc) of this main table.
utf = utf or unicode.utf8
if not generic_context then
generic_context = { }
end
if not generic_context.push_namespaces then
function generic_context.push_namespaces()
texio.write(" <push namespace>")
local normalglobal = { }
for k, v in next, _G do
normalglobal[k] = v
end
return normalglobal
end
function generic_context.pop_namespaces(normalglobal,isolate)
if normalglobal then
texio.write(" <pop namespace>")
for k, v in next, _G do
if not normalglobal[k] then
generic_context[k] = v
if isolate then
_G[k] = nil
end
end
end
for k, v in next, normalglobal do
_G[k] = v
end
-- just to be sure:
setmetatable(generic_context,_G)
else
texio.write(" <fatal error: invalid pop of generic_context>")
os.exit()
end
end
end
local whatever = generic_context.push_namespaces()
-- We keep track of load time by storing the current time. That way we cannot be accused
-- of slowing down loading too much. Anyhow, there is no reason for this library to perform
-- slower in any other package as it does in context.
--
-- Please don't update to this version without proper testing. It might be that this version
-- lags behind stock context and the only formal release takes place around tex live code
-- freeze.
local starttime = os.gettimeofday()
-- As we don't use the context file searching, we need to initialize the kpse library. As the
-- progname can be anything we will temporary switch to the context namespace if needed. Just
-- adding the context paths to the path specification is somewhat faster.
--
-- Now, with lua 5.2 being used we might create a special ENV for this.
-- kpse.set_program_name("luatex")
local ctxkpse = nil
local verbose = true
local function loadmodule(name,continue)
local foundname = kpse.find_file(name,"tex") or ""
if not foundname then
if not ctxkpse then
ctxkpse = kpse.new("luatex","context")
end
foundname = ctxkpse:find_file(name,"tex") or ""
end
if foundname == "" then
if not continue then
texio.write_nl(string.format(" <luatex-fonts: unable to locate %s>",name))
os.exit()
end
else
if verbose then
texio.write(string.format(" <%s>",foundname)) -- no file.basename yet
end
dofile(foundname)
end
end
loadmodule('luatex-fonts-merged.lua',true) -- you might comment this line
if fonts then
if not fonts._merge_loaded_message_done_ then
texio.write_nl("log", "!")
texio.write_nl("log", "! I am using the merged version of 'luatex-fonts.lua' here. If")
texio.write_nl("log", "! you run into problems or experience unexpected behaviour, and")
texio.write_nl("log", "! if you have ConTeXt installed you can try to delete the file")
texio.write_nl("log", "! 'luatex-font-merged.lua' as I might then use the possibly")
texio.write_nl("log", "! updated libraries. The merged version is not supported as it")
texio.write_nl("log", "! is a frozen instance. Problems can be reported to the ConTeXt")
texio.write_nl("log", "! mailing list.")
texio.write_nl("log", "!")
end
fonts._merge_loaded_message_done_ = true
else
-- The following helpers are a bit overkill but I don't want to mess up context code for the
-- sake of general generality. Around version 1.0 there will be an official api defined.
--
-- So, I will strip these libraries and see what is really needed so that we don't have this
-- overhead in the generic modules. The next section is only there for the packager, so stick
-- to using luatex-fonts with luatex-fonts-merged.lua and forget about the rest. The following
-- list might change without prior notice (for instance because we shuffled code around).
loadmodule("l-lua.lua")
loadmodule("l-lpeg.lua")
loadmodule("l-function.lua")
loadmodule("l-string.lua")
loadmodule("l-table.lua")
loadmodule("l-io.lua")
----------("l-number.lua")
----------("l-set.lua")
----------("l-os.lua")
loadmodule("l-file.lua")
----------("l-md5.lua")
----------("l-url.lua")
----------("l-dir.lua")
loadmodule("l-boolean.lua")
----------("l-unicode.lua")
loadmodule("l-math.lua")
loadmodule("util-str.lua")
-- 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
-- their work. Don't depend on their functions as we might strip them in future versions of his
-- generic variant.
loadmodule('luatex-basics-gen.lua')
loadmodule('data-con.lua')
-- We do need some basic node support. The code in there is not for general use as it might change.
loadmodule('luatex-basics-nod.lua')
-- Now come the font modules that deal with traditional tex fonts as well as open type fonts. We only
-- support OpenType fonts here.
--
-- 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).
-- in 2013/14 we will merge/move some generic files into luatex-fonts-* files (copies) so that
-- intermediate updates of context not interfere
loadmodule('font-ini.lua')
loadmodule('font-con.lua')
loadmodule('luatex-fonts-enc.lua') -- will load font-age on demand
loadmodule('font-cid.lua')
loadmodule('font-map.lua') -- for loading lum file (will be stripped)
loadmodule('luatex-fonts-syn.lua') -- deals with font names (synonyms)
loadmodule('luatex-fonts-tfm.lua')
loadmodule('font-oti.lua')
loadmodule('font-otf.lua')
loadmodule('font-otb.lua')
loadmodule('node-inj.lua') -- will be replaced (luatex >= .70)
loadmodule('font-ota.lua')
loadmodule('font-otn.lua')
----------('luatex-fonts-chr.lua')
loadmodule('luatex-fonts-lua.lua')
loadmodule('font-def.lua')
loadmodule('luatex-fonts-def.lua')
loadmodule('luatex-fonts-ext.lua') -- some extensions
-- We need to plug into a callback and the following module implements the handlers. Actual plugging
-- in happens later.
loadmodule('luatex-fonts-cbk.lua')
end
resolvers.loadmodule = loadmodule
-- In order to deal with the fonts we need to initialize some callbacks. One can overload them later on if
-- needed. First a bit of abstraction.
generic_context.callback_ligaturing = false
generic_context.callback_kerning = false
generic_context.callback_pre_linebreak_filter = nodes.simple_font_handler
generic_context.callback_hpack_filter = nodes.simple_font_handler
generic_context.callback_define_font = fonts.definers.read
-- The next ones can be done at a different moment if needed. You can create a generic_context namespace
-- and set no_callbacks_yet to true, load this module, and enable the callbacks later. So, there is really
-- *no* need to create a alternative for luatex-fonts.lua and luatex-fonts-merged.lua: just load this one
-- and overload if needed.
if not generic_context.no_callbacks_yet then
callback.register('ligaturing', generic_context.callback_ligaturing)
callback.register('kerning', generic_context.callback_kerning)
callback.register('pre_linebreak_filter', generic_context.callback_pre_linebreak_filter)
callback.register('hpack_filter', generic_context.callback_hpack_filter)
callback.register('define_font' , generic_context.callback_define_font)
end
-- We're done.
texio.write(string.format(" <luatex-fonts.lua loaded in %0.3f seconds>", os.gettimeofday()-starttime))
generic_context.pop_namespaces(whatever)
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