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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 ... adapted to lua 5.2 ... but still
-- experimental
local debug = require("debug")
local string, table, lpeg, math, io, system = string, table, lpeg, math, io, system
local rawset, rawget, next, setmetatable = rawset, rawget, next, setmetatable
--[[ldx--
<p>We cannot load anything yet. However what we will do us reserve a few tables.
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
table.setmetatableindex(moduledata,table.autokey)
table.setmetatableindex(thirddata, table.autokey)
--[[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]]--
local global = _G
global.global = global
local dummy = function() end
--[[ldx--
<p>Another approach is to freeze tables by using a metatable, this will be
implemented stepwise.</p>
--ldx]]--
-- moduledata : no need for protection (only for developers)
-- isolatedata : full protection
-- userdata : protected
-- thirddata : protected
--[[ldx--
<p>We could have a metatable that automaticaly creates a top level namespace.</p>
--ldx]]--
local luanames = lua.name -- luatex itself
lua.numbers = lua.numbers or { } local numbers = lua.numbers
lua.messages = lua.messages or { } local messages = lua.messages
storage.register("lua/numbers", numbers, "lua.numbers" )
storage.register("lua/messages", messages, "lua.messages")
local setfenv = setfenv or debug.setfenv -- < 5.2
if setfenv then
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,
file = file,
bit32 = bit32,
--
context = context,
}
local protect_full = function(name)
local t = { }
for k, v in next, protected do
t[k] = v
end
return t
end
local protect_part = function(name) -- adds
local t = rawget(global,name)
if not t then
t = { }
for k, v in next, protected do
t[k] = v
end
rawset(global,name,t)
end
return t
end
protect = function(name)
if name == "isolateddata" then
setfenv(2,protect_full(name))
else
setfenv(2,protect_part(name or "shareddata"))
end
end
function lua.registername(name,message)
local lnn = lua.numbers[name]
if not lnn then
lnn = #messages + 1
messages[lnn] = message
numbers[name] = lnn
end
luanames[lnn] = message
context(lnn)
-- initialize once
if name ~= "isolateddata" then
protect_full(name or "shareddata")
end
end
elseif libraries then -- assume >= 5.2
local shared
protect = function(name)
if not shared then
-- e.g. context is not yet known
local public = {
global = global,
-- moduledata = moduledata,
userdata = userdata,
thirddata = thirddata,
documentdata = documentdata,
protect = dummy,
unprotect = dummy,
context = context,
}
--
for k, v in next, libraries.builtin do public[k] = v end
for k, v in next, libraries.functions do public[k] = v end
for k, v in next, libraries.obsolete do public[k] = nil end
--
shared = { __index = public }
protect = function(name)
local t = global[name] or { }
setmetatable(t,shared) -- set each time
return t
end
end
return protect(name)
end
function lua.registername(name,message)
local lnn = lua.numbers[name]
if not lnn then
lnn = #messages + 1
messages[lnn] = message
numbers[name] = lnn
end
luanames[lnn] = message
context(lnn)
end
else
protect = dummy
function lua.registername(name,message)
local lnn = lua.numbers[name]
if not lnn then
lnn = #messages + 1
messages[lnn] = message
numbers[name] = lnn
end
luanames[lnn] = message
context(lnn)
end
end
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