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if not modules then modules = { } end modules ['luat-ini'] = {
version = 1.001,
comment = "companion to luat-lib.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- rather experimental down here ... will change with lua 5.2 --
local debug = require("debug")
local string, table, lpeg, math, io, system = string, table, lpeg, math, io, system
local next, setfenv = next, setfenv or debug.setfenv
--[[ldx--
<p>We cannot load anything yet. However what we will do us reserve a fewtables.
These can be used for runtime user data or third party modules and will not be
cluttered by macro package code.</p>
--ldx]]--
userdata = userdata or { } -- for users (e.g. functions etc)
thirddata = thirddata or { } -- only for third party modules
moduledata = moduledata or { } -- only for development team
documentdata = documentdata or { } -- for users (e.g. raw data)
parametersets = parametersets or { } -- experimental for team
--[[ldx--
<p>Please create a namespace within these tables before using them!</p>
<typing>
userdata ['my.name'] = { }
thirddata['tricks' ] = { }
</typing>
--ldx]]--
--[[ldx--
<p>We could cook up a readonly model for global tables but it
makes more sense to invite users to use one of the predefined
namespaces. One can redefine the protector. After all, it's
just a lightweight suggestive system, not a watertight
one.</p>
--ldx]]--
-- this will change when we move on to lua 5.2+
local global = _G
global.global = global
--~ rawset(global,"global",global)
local dummy = function() end
-- another approach is to freeze tables by using a metatable, this will be
-- implemented stepwise
local protected = {
-- global table
global = global,
-- user tables
-- moduledata = moduledata,
userdata = userdata,
thirddata = thirddata,
documentdata = documentdata,
-- reserved
protect = dummy,
unprotect = dummy,
-- luatex
tex = tex,
-- lua
string = string,
table = table,
lpeg = lpeg,
math = math,
io = io,
--
-- maybe other l-*, xml etc
}
-- moduledata : no need for protection (only for developers)
-- isolatedata : full protection
-- userdata : protected
-- thirddata : protected
userdata, thirddata = nil, nil
-- we could have a metatable that automaticaly creates a top level namespace
if not setfenv then
texio.write_nl("warning: we need to fix setfenv by using 'load in' or '_ENV'")
end
local function protect_full(name)
local t = { }
for k, v in next, protected do
t[k] = v
end
return t
end
local function protect_part(name)
--~ local t = global[name]
local t = rawget(global,name)
if not t then
t = { }
for k, v in next, protected do
t[k] = v
end
--~ global[name] = t
rawset(global,name,t)
end
return t
end
function protect(name)
if name == "isolateddata" then
setfenv(2,protect_full(name))
else
setfenv(2,protect_part(name or "shareddata"))
end
end
lua.numbers = { }
lua.messages = { }
function lua.registername(name,message)
local lnn = lua.numbers[name]
if not lnn then
lnn = #lua.messages + 1
lua.messages[lnn] = message
lua.numbers[name] = lnn
end
lua.name[lnn] = message
context(lnn)
-- initialize once
if name ~= "isolateddata" then
protect_full(name or "shareddata")
end
end
--~ function lua.checknames()
--~ lua.name[0] = "ctx"
--~ for k, v in next, lua.messages do
--~ lua.name[k] = v
--~ end
--~ end
storage.register("lua/numbers", lua.numbers, "lua.numbers")
storage.register("lua/messages", lua.messages, "lua.messages")
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