minetest/builtin/game/register.lua
2014-05-08 13:02:04 -04:00

411 lines
12 KiB
Lua

-- Minetest: builtin/misc_register.lua
--
-- Make raw registration functions inaccessible to anyone except this file
--
local register_item_raw = core.register_item_raw
core.register_item_raw = nil
local register_alias_raw = core.register_alias_raw
core.register_item_raw = nil
--
-- Item / entity / ABM registration functions
--
core.registered_abms = {}
core.registered_entities = {}
core.registered_items = {}
core.registered_nodes = {}
core.registered_craftitems = {}
core.registered_tools = {}
core.registered_aliases = {}
-- For tables that are indexed by item name:
-- If table[X] does not exist, default to table[core.registered_aliases[X]]
local alias_metatable = {
__index = function(t, name)
return rawget(t, core.registered_aliases[name])
end
}
setmetatable(core.registered_items, alias_metatable)
setmetatable(core.registered_nodes, alias_metatable)
setmetatable(core.registered_craftitems, alias_metatable)
setmetatable(core.registered_tools, alias_metatable)
-- 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 = core.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 core.register_abm(spec)
-- Add to core.registered_abms
core.registered_abms[#core.registered_abms+1] = spec
end
function core.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 core.registered_entities
core.registered_entities[name] = prototype
end
function core.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
-- Use the nodebox as selection box if it's not set manually
if itemdef.drawtype == "nodebox" and not itemdef.selection_box then
itemdef.selection_box = itemdef.node_box
elseif itemdef.drawtype == "fencelike" and not itemdef.selection_box then
itemdef.selection_box = {
type = "fixed",
fixed = {-1/8, -1/2, -1/8, 1/8, 1/2, 1/8},
}
end
setmetatable(itemdef, {__index = core.nodedef_default})
core.registered_nodes[itemdef.name] = itemdef
elseif itemdef.type == "craft" then
setmetatable(itemdef, {__index = core.craftitemdef_default})
core.registered_craftitems[itemdef.name] = itemdef
elseif itemdef.type == "tool" then
setmetatable(itemdef, {__index = core.tooldef_default})
core.registered_tools[itemdef.name] = itemdef
elseif itemdef.type == "none" then
setmetatable(itemdef, {__index = core.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
core.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
core.register_craft({
type="fuel",
recipe=itemdef.name,
burntime=itemdef.furnace_burntime
})
end
-- END Legacy stuff
-- Disable all further modifications
getmetatable(itemdef).__newindex = {}
--core.log("Registering item: " .. itemdef.name)
core.registered_items[itemdef.name] = itemdef
core.registered_aliases[itemdef.name] = nil
register_item_raw(itemdef)
end
function core.register_node(name, nodedef)
nodedef.type = "node"
core.register_item(name, nodedef)
end
function core.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
core.register_item(name, craftitemdef)
end
function core.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
core.register_item(name, tooldef)
end
function core.register_alias(name, convert_to)
if forbidden_item_names[name] then
error("Unable to register alias: Name is forbidden: " .. name)
end
if core.registered_items[name] ~= nil then
core.log("WARNING: Not registering alias, item with same name" ..
" is already defined: " .. name .. " -> " .. convert_to)
else
--core.log("Registering alias: " .. name .. " -> " .. convert_to)
core.registered_aliases[name] = convert_to
register_alias_raw(name, convert_to)
end
end
local register_biome_raw = core.register_biome
core.registered_biomes = {}
function core.register_biome(biome)
core.registered_biomes[biome.name] = biome
register_biome_raw(biome)
end
function core.on_craft(itemstack, player, old_craft_list, craft_inv)
for _, func in ipairs(core.registered_on_crafts) do
itemstack = func(itemstack, player, old_craft_list, craft_inv) or itemstack
end
return itemstack
end
function core.craft_predict(itemstack, player, old_craft_list, craft_inv)
for _, func in ipairs(core.registered_craft_predicts) do
itemstack = func(itemstack, player, old_craft_list, craft_inv) or itemstack
end
return itemstack
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
core.registered_aliases[name] = ""
register_alias_raw(name, "")
end
-- Deprecated:
-- Aliases for core.register_alias (how ironic...)
--core.alias_node = core.register_alias
--core.alias_tool = core.register_alias
--core.alias_craftitem = core.register_alias
--
-- Built-in node definitions. Also defined in C.
--
core.register_item(":unknown", {
type = "none",
description = "Unknown Item",
inventory_image = "unknown_item.png",
on_place = core.item_place,
on_drop = core.item_drop,
groups = {not_in_creative_inventory=1},
diggable = true,
})
core.register_node(":air", {
description = "Air (you hacker you!)",
inventory_image = "unknown_node.png",
wield_image = "unknown_node.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},
})
core.register_node(":ignore", {
description = "Ignore (you hacker you!)",
inventory_image = "unknown_node.png",
wield_image = "unknown_node.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)
core.register_item(":", {
type = "none",
groups = {not_in_creative_inventory=1},
})
function core.override_item(name, redefinition)
if redefinition.name ~= nil then
error("Attempt to redefine name of "..name.." to "..dump(redefinition.name), 2)
end
if redefinition.type ~= nil then
error("Attempt to redefine type of "..name.." to "..dump(redefinition.type), 2)
end
local item = core.registered_items[name]
if not item then
error("Attempt to override non-existent item "..name, 2)
end
for k, v in pairs(redefinition) do
rawset(item, k, v)
end
register_item_raw(item)
end
function core.run_callbacks(callbacks, mode, ...)
assert(type(callbacks) == "table")
local cb_len = #callbacks
if cb_len == 0 then
if mode == 2 or mode == 3 then
return true
elseif mode == 4 or mode == 5 then
return false
end
end
local ret = nil
for i = 1, cb_len do
local cb_ret = callbacks[i](...)
if mode == 0 and i == 1 then
ret = cb_ret
elseif mode == 1 and i == cb_len then
ret = cb_ret
elseif mode == 2 then
if not cb_ret or i == 1 then
ret = cb_ret
end
elseif mode == 3 then
if cb_ret then
return cb_ret
end
ret = cb_ret
elseif mode == 4 then
if (cb_ret and not ret) or i == 1 then
ret = cb_ret
end
elseif mode == 5 and cb_ret then
return cb_ret
end
end
return ret
end
--
-- 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
core.registered_on_chat_messages, core.register_on_chat_message = make_registration()
core.registered_globalsteps, core.register_globalstep = make_registration()
core.registered_playerevents, core.register_playerevent = make_registration()
core.registered_on_mapgen_inits, core.register_on_mapgen_init = make_registration()
core.registered_on_shutdown, core.register_on_shutdown = make_registration()
core.registered_on_punchnodes, core.register_on_punchnode = make_registration()
core.registered_on_placenodes, core.register_on_placenode = make_registration()
core.registered_on_dignodes, core.register_on_dignode = make_registration()
core.registered_on_generateds, core.register_on_generated = make_registration()
core.registered_on_newplayers, core.register_on_newplayer = make_registration()
core.registered_on_dieplayers, core.register_on_dieplayer = make_registration()
core.registered_on_respawnplayers, core.register_on_respawnplayer = make_registration()
core.registered_on_prejoinplayers, core.register_on_prejoinplayer = make_registration()
core.registered_on_joinplayers, core.register_on_joinplayer = make_registration()
core.registered_on_leaveplayers, core.register_on_leaveplayer = make_registration()
core.registered_on_player_receive_fields, core.register_on_player_receive_fields = make_registration_reverse()
core.registered_on_cheats, core.register_on_cheat = make_registration()
core.registered_on_crafts, core.register_on_craft = make_registration()
core.registered_craft_predicts, core.register_craft_predict = make_registration()
core.registered_on_protection_violation, core.register_on_protection_violation = make_registration()