minetest/builtin/misc_register.lua
Matthew I 6c8fa83ecd Add shutdown hook interface to Lua API
Scripts can call minetest.register_on_shutdown() to register a
shutdown hook.

Document that minetest.register_on_shutdown() callbacks may not be run

If the server crashes, it is unlikely that callbacks registered using
minetest.register_on_shutdown() will be called.
2012-11-30 19:26:51 +02:00

318 lines
9.6 KiB
Lua

-- Minetest: builtin/misc_register.lua
--
-- Make raw registration functions inaccessible to anyone except this file
--
local register_item_raw = minetest.register_item_raw
minetest.register_item_raw = nil
local register_alias_raw = minetest.register_alias_raw
minetest.register_item_raw = nil
--
-- Item / entity / ABM registration functions
--
minetest.registered_abms = {}
minetest.registered_entities = {}
minetest.registered_items = {}
minetest.registered_nodes = {}
minetest.registered_craftitems = {}
minetest.registered_tools = {}
minetest.registered_aliases = {}
-- For tables that are indexed by item name:
-- If table[X] does not exist, default to table[minetest.registered_aliases[X]]
local function set_alias_metatable(table)
setmetatable(table, {
__index = function(name)
return rawget(table, minetest.registered_aliases[name])
end
})
end
set_alias_metatable(minetest.registered_items)
set_alias_metatable(minetest.registered_nodes)
set_alias_metatable(minetest.registered_craftitems)
set_alias_metatable(minetest.registered_tools)
-- These item names may not be used because they would interfere
-- with legacy itemstrings
local forbidden_item_names = {
MaterialItem = true,
MaterialItem2 = true,
MaterialItem3 = true,
NodeItem = true,
node = true,
CraftItem = true,
craft = true,
MBOItem = true,
ToolItem = true,
tool = true,
}
local function check_modname_prefix(name)
if name:sub(1,1) == ":" then
-- Escape the modname prefix enforcement mechanism
return name:sub(2)
else
-- Modname prefix enforcement
local expected_prefix = minetest.get_current_modname() .. ":"
if name:sub(1, #expected_prefix) ~= expected_prefix then
error("Name " .. name .. " does not follow naming conventions: " ..
"\"modname:\" or \":\" prefix required")
end
local subname = name:sub(#expected_prefix+1)
if subname:find("[^abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]") then
error("Name " .. name .. " does not follow naming conventions: " ..
"contains unallowed characters")
end
return name
end
end
function minetest.register_abm(spec)
-- Add to minetest.registered_abms
minetest.registered_abms[#minetest.registered_abms+1] = spec
end
function minetest.register_entity(name, prototype)
-- Check name
if name == nil then
error("Unable to register entity: Name is nil")
end
name = check_modname_prefix(tostring(name))
prototype.name = name
prototype.__index = prototype -- so that it can be used as a metatable
-- Add to minetest.registered_entities
minetest.registered_entities[name] = prototype
end
function minetest.register_item(name, itemdef)
-- Check name
if name == nil then
error("Unable to register item: Name is nil")
end
name = check_modname_prefix(tostring(name))
if forbidden_item_names[name] then
error("Unable to register item: Name is forbidden: " .. name)
end
itemdef.name = name
-- Apply defaults and add to registered_* table
if itemdef.type == "node" then
setmetatable(itemdef, {__index = minetest.nodedef_default})
minetest.registered_nodes[itemdef.name] = itemdef
elseif itemdef.type == "craft" then
setmetatable(itemdef, {__index = minetest.craftitemdef_default})
minetest.registered_craftitems[itemdef.name] = itemdef
elseif itemdef.type == "tool" then
setmetatable(itemdef, {__index = minetest.tooldef_default})
minetest.registered_tools[itemdef.name] = itemdef
elseif itemdef.type == "none" then
setmetatable(itemdef, {__index = minetest.noneitemdef_default})
else
error("Unable to register item: Type is invalid: " .. dump(itemdef))
end
-- Flowing liquid uses param2
if itemdef.type == "node" and itemdef.liquidtype == "flowing" then
itemdef.paramtype2 = "flowingliquid"
end
-- BEGIN Legacy stuff
if itemdef.cookresult_itemstring ~= nil and itemdef.cookresult_itemstring ~= "" then
minetest.register_craft({
type="cooking",
output=itemdef.cookresult_itemstring,
recipe=itemdef.name,
cooktime=itemdef.furnace_cooktime
})
end
if itemdef.furnace_burntime ~= nil and itemdef.furnace_burntime >= 0 then
minetest.register_craft({
type="fuel",
recipe=itemdef.name,
burntime=itemdef.furnace_burntime
})
end
-- END Legacy stuff
-- Disable all further modifications
getmetatable(itemdef).__newindex = {}
--minetest.log("Registering item: " .. itemdef.name)
minetest.registered_items[itemdef.name] = itemdef
minetest.registered_aliases[itemdef.name] = nil
register_item_raw(itemdef)
end
function minetest.register_node(name, nodedef)
nodedef.type = "node"
minetest.register_item(name, nodedef)
end
function minetest.register_craftitem(name, craftitemdef)
craftitemdef.type = "craft"
-- BEGIN Legacy stuff
if craftitemdef.inventory_image == nil and craftitemdef.image ~= nil then
craftitemdef.inventory_image = craftitemdef.image
end
-- END Legacy stuff
minetest.register_item(name, craftitemdef)
end
function minetest.register_tool(name, tooldef)
tooldef.type = "tool"
tooldef.stack_max = 1
-- BEGIN Legacy stuff
if tooldef.inventory_image == nil and tooldef.image ~= nil then
tooldef.inventory_image = tooldef.image
end
if tooldef.tool_capabilities == nil and
(tooldef.full_punch_interval ~= nil or
tooldef.basetime ~= nil or
tooldef.dt_weight ~= nil or
tooldef.dt_crackiness ~= nil or
tooldef.dt_crumbliness ~= nil or
tooldef.dt_cuttability ~= nil or
tooldef.basedurability ~= nil or
tooldef.dd_weight ~= nil or
tooldef.dd_crackiness ~= nil or
tooldef.dd_crumbliness ~= nil or
tooldef.dd_cuttability ~= nil) then
tooldef.tool_capabilities = {
full_punch_interval = tooldef.full_punch_interval,
basetime = tooldef.basetime,
dt_weight = tooldef.dt_weight,
dt_crackiness = tooldef.dt_crackiness,
dt_crumbliness = tooldef.dt_crumbliness,
dt_cuttability = tooldef.dt_cuttability,
basedurability = tooldef.basedurability,
dd_weight = tooldef.dd_weight,
dd_crackiness = tooldef.dd_crackiness,
dd_crumbliness = tooldef.dd_crumbliness,
dd_cuttability = tooldef.dd_cuttability,
}
end
-- END Legacy stuff
minetest.register_item(name, tooldef)
end
function minetest.register_alias(name, convert_to)
if forbidden_item_names[name] then
error("Unable to register alias: Name is forbidden: " .. name)
end
if minetest.registered_items[name] ~= nil then
minetest.log("WARNING: Not registering alias, item with same name" ..
" is already defined: " .. name .. " -> " .. convert_to)
else
--minetest.log("Registering alias: " .. name .. " -> " .. convert_to)
minetest.registered_aliases[name] = convert_to
register_alias_raw(name, convert_to)
end
end
-- Alias the forbidden item names to "" so they can't be
-- created via itemstrings (e.g. /give)
local name
for name in pairs(forbidden_item_names) do
minetest.registered_aliases[name] = ""
register_alias_raw(name, "")
end
-- Deprecated:
-- Aliases for minetest.register_alias (how ironic...)
--minetest.alias_node = minetest.register_alias
--minetest.alias_tool = minetest.register_alias
--minetest.alias_craftitem = minetest.register_alias
--
-- Built-in node definitions. Also defined in C.
--
minetest.register_item(":unknown", {
type = "none",
description = "Unknown Item",
inventory_image = "unknown_item.png",
on_place = minetest.item_place,
on_drop = minetest.item_drop,
groups = {not_in_creative_inventory=1},
})
minetest.register_node(":air", {
description = "Air (you hacker you!)",
inventory_image = "unknown_block.png",
wield_image = "unknown_block.png",
drawtype = "airlike",
paramtype = "light",
sunlight_propagates = true,
walkable = false,
pointable = false,
diggable = false,
buildable_to = true,
air_equivalent = true,
drop = "",
groups = {not_in_creative_inventory=1},
})
minetest.register_node(":ignore", {
description = "Ignore (you hacker you!)",
inventory_image = "unknown_block.png",
wield_image = "unknown_block.png",
drawtype = "airlike",
paramtype = "none",
sunlight_propagates = false,
walkable = false,
pointable = false,
diggable = false,
buildable_to = true, -- A way to remove accidentally placed ignores
air_equivalent = true,
drop = "",
groups = {not_in_creative_inventory=1},
})
-- The hand (bare definition)
minetest.register_item(":", {
type = "none",
groups = {not_in_creative_inventory=1},
})
--
-- Callback registration
--
local function make_registration()
local t = {}
local registerfunc = function(func) table.insert(t, func) end
return t, registerfunc
end
local function make_registration_reverse()
local t = {}
local registerfunc = function(func) table.insert(t, 1, func) end
return t, registerfunc
end
minetest.registered_on_chat_messages, minetest.register_on_chat_message = make_registration()
minetest.registered_globalsteps, minetest.register_globalstep = make_registration()
minetest.registered_on_shutdown, minetest.register_on_shutdown = make_registration()
minetest.registered_on_punchnodes, minetest.register_on_punchnode = make_registration()
minetest.registered_on_placenodes, minetest.register_on_placenode = make_registration()
minetest.registered_on_dignodes, minetest.register_on_dignode = make_registration()
minetest.registered_on_generateds, minetest.register_on_generated = make_registration()
minetest.registered_on_newplayers, minetest.register_on_newplayer = make_registration()
minetest.registered_on_dieplayers, minetest.register_on_dieplayer = make_registration()
minetest.registered_on_respawnplayers, minetest.register_on_respawnplayer = make_registration()
minetest.registered_on_joinplayers, minetest.register_on_joinplayer = make_registration()
minetest.registered_on_leaveplayers, minetest.register_on_leaveplayer = make_registration()
minetest.registered_on_player_receive_fields, minetest.register_on_player_receive_fields = make_registration_reverse()