builtin/misc_register.lua

   1 -- Minetest: builtin/misc_register.lua
   2
   3 --
   4 -- Make raw registration functions inaccessible to anyone except this file
   5 --
   6
   7 local register_item_raw = minetest.register_item_raw
   8 minetest.register_item_raw = nil
   9
  10 local register_alias_raw = minetest.register_alias_raw
  11 minetest.register_item_raw = nil
  12
  13 --
  14 -- Item / entity / ABM registration functions
  15 --
  16
  17 minetest.registered_abms = {}
  18 minetest.registered_entities = {}
  19 minetest.registered_items = {}
  20 minetest.registered_nodes = {}
  21 minetest.registered_craftitems = {}
  22 minetest.registered_tools = {}
  23 minetest.registered_aliases = {}
  24
  25 -- For tables that are indexed by item name:
  26 -- If table[X] does not exist, default to table[minetest.registered_aliases[X]]
  27 local function set_alias_metatable(table)
  28         setmetatable(table, {
  29                 __index = function(name)
  30                         return rawget(table, minetest.registered_aliases[name])
  31                 end
  32         })
  33 end
  34 set_alias_metatable(minetest.registered_items)
  35 set_alias_metatable(minetest.registered_nodes)
  36 set_alias_metatable(minetest.registered_craftitems)
  37 set_alias_metatable(minetest.registered_tools)
  38
  39 -- These item names may not be used because they would interfere
  40 -- with legacy itemstrings
  41 local forbidden_item_names = {
  42         MaterialItem = true,
  43         MaterialItem2 = true,
  44         MaterialItem3 = true,
  45         NodeItem = true,
  46         node = true,
  47         CraftItem = true,
  48         craft = true,
  49         MBOItem = true,
  50         ToolItem = true,
  51         tool = true,
  52 }
  53
  54 local function check_modname_prefix(name)
  55         if name:sub(1,1) == ":" then
  56                 -- Escape the modname prefix enforcement mechanism
  57                 return name:sub(2)
  58         else
  59                 -- Modname prefix enforcement
  60                 local expected_prefix = minetest.get_current_modname() .. ":"
  61                 if name:sub(1, #expected_prefix) ~= expected_prefix then
  62                         error("Name " .. name .. " does not follow naming conventions: " ..
  63                                 "\"modname:\" or \":\" prefix required")
  64                 end
  65                 local subname = name:sub(#expected_prefix+1)
  66                 if subname:find("[^abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]") then
  67                         error("Name " .. name .. " does not follow naming conventions: " ..
  68                                 "contains unallowed characters")
  69                 end
  70                 return name
  71         end
  72 end
  73
  74 function minetest.register_abm(spec)
  75         -- Add to minetest.registered_abms
  76         minetest.registered_abms[#minetest.registered_abms+1] = spec
  77 end
  78
  79 function minetest.register_entity(name, prototype)
  80         -- Check name
  81         if name == nil then
  82                 error("Unable to register entity: Name is nil")
  83         end
  84         name = check_modname_prefix(tostring(name))
  85
  86         prototype.name = name
  87         prototype.__index = prototype  -- so that it can be used as a metatable
  88
  89         -- Add to minetest.registered_entities
  90         minetest.registered_entities[name] = prototype
  91 end
  92
  93 function minetest.register_item(name, itemdef)
  94         -- Check name
  95         if name == nil then
  96                 error("Unable to register item: Name is nil")
  97         end
  98         name = check_modname_prefix(tostring(name))
  99         if forbidden_item_names[name] then
 100                 error("Unable to register item: Name is forbidden: " .. name)
 101         end
 102         itemdef.name = name
 103
 104         -- Apply defaults and add to registered_* table
 105         if itemdef.type == "node" then
 106                 -- Use the nodebox as selection box if it's not set manually
 107                 if itemdef.drawtype == "nodebox" and not itemdef.selection_box then
 108                         itemdef.selection_box = itemdef.node_box
 109                 end
 110                 setmetatable(itemdef, {__index = minetest.nodedef_default})
 111                 minetest.registered_nodes[itemdef.name] = itemdef
 112         elseif itemdef.type == "craft" then
 113                 setmetatable(itemdef, {__index = minetest.craftitemdef_default})
 114                 minetest.registered_craftitems[itemdef.name] = itemdef
 115         elseif itemdef.type == "tool" then
 116                 setmetatable(itemdef, {__index = minetest.tooldef_default})
 117                 minetest.registered_tools[itemdef.name] = itemdef
 118         elseif itemdef.type == "none" then
 119                 setmetatable(itemdef, {__index = minetest.noneitemdef_default})
 120         else
 121                 error("Unable to register item: Type is invalid: " .. dump(itemdef))
 122         end
 123
 124         -- Flowing liquid uses param2
 125         if itemdef.type == "node" and itemdef.liquidtype == "flowing" then
 126                 itemdef.paramtype2 = "flowingliquid"
 127         end
 128
 129         -- BEGIN Legacy stuff
 130         if itemdef.cookresult_itemstring ~= nil and itemdef.cookresult_itemstring ~= "" then
 131                 minetest.register_craft({
 132                         type="cooking",
 133                         output=itemdef.cookresult_itemstring,
 134                         recipe=itemdef.name,
 135                         cooktime=itemdef.furnace_cooktime
 136                 })
 137         end
 138         if itemdef.furnace_burntime ~= nil and itemdef.furnace_burntime >= 0 then
 139                 minetest.register_craft({
 140                         type="fuel",
 141                         recipe=itemdef.name,
 142                         burntime=itemdef.furnace_burntime
 143                 })
 144         end
 145         -- END Legacy stuff
 146
 147         -- Disable all further modifications
 148         getmetatable(itemdef).__newindex = {}
 149
 150         --minetest.log("Registering item: " .. itemdef.name)
 151         minetest.registered_items[itemdef.name] = itemdef
 152         minetest.registered_aliases[itemdef.name] = nil
 153         register_item_raw(itemdef)
 154 end
 155
 156 function minetest.register_node(name, nodedef)
 157         nodedef.type = "node"
 158         minetest.register_item(name, nodedef)
 159 end
 160
 161 function minetest.register_craftitem(name, craftitemdef)
 162         craftitemdef.type = "craft"
 163
 164         -- BEGIN Legacy stuff
 165         if craftitemdef.inventory_image == nil and craftitemdef.image ~= nil then
 166                 craftitemdef.inventory_image = craftitemdef.image
 167         end
 168         -- END Legacy stuff
 169
 170         minetest.register_item(name, craftitemdef)
 171 end
 172
 173 function minetest.register_tool(name, tooldef)
 174         tooldef.type = "tool"
 175         tooldef.stack_max = 1
 176
 177         -- BEGIN Legacy stuff
 178         if tooldef.inventory_image == nil and tooldef.image ~= nil then
 179                 tooldef.inventory_image = tooldef.image
 180         end
 181         if tooldef.tool_capabilities == nil and
 182            (tooldef.full_punch_interval ~= nil or
 183             tooldef.basetime ~= nil or
 184             tooldef.dt_weight ~= nil or
 185             tooldef.dt_crackiness ~= nil or
 186             tooldef.dt_crumbliness ~= nil or
 187             tooldef.dt_cuttability ~= nil or
 188             tooldef.basedurability ~= nil or
 189             tooldef.dd_weight ~= nil or
 190             tooldef.dd_crackiness ~= nil or
 191             tooldef.dd_crumbliness ~= nil or
 192             tooldef.dd_cuttability ~= nil) then
 193                 tooldef.tool_capabilities = {
 194                         full_punch_interval = tooldef.full_punch_interval,
 195                         basetime = tooldef.basetime,
 196                         dt_weight = tooldef.dt_weight,
 197                         dt_crackiness = tooldef.dt_crackiness,
 198                         dt_crumbliness = tooldef.dt_crumbliness,
 199                         dt_cuttability = tooldef.dt_cuttability,
 200                         basedurability = tooldef.basedurability,
 201                         dd_weight = tooldef.dd_weight,
 202                         dd_crackiness = tooldef.dd_crackiness,
 203                         dd_crumbliness = tooldef.dd_crumbliness,
 204                         dd_cuttability = tooldef.dd_cuttability,
 205                 }
 206         end
 207         -- END Legacy stuff
 208
 209         minetest.register_item(name, tooldef)
 210 end
 211
 212 function minetest.register_alias(name, convert_to)
 213         if forbidden_item_names[name] then
 214                 error("Unable to register alias: Name is forbidden: " .. name)
 215         end
 216         if minetest.registered_items[name] ~= nil then
 217                 minetest.log("WARNING: Not registering alias, item with same name" ..
 218                         " is already defined: " .. name .. " -> " .. convert_to)
 219         else
 220                 --minetest.log("Registering alias: " .. name .. " -> " .. convert_to)
 221                 minetest.registered_aliases[name] = convert_to
 222                 register_alias_raw(name, convert_to)
 223         end
 224 end
 225
 226 -- Alias the forbidden item names to "" so they can't be
 227 -- created via itemstrings (e.g. /give)
 228 local name
 229 for name in pairs(forbidden_item_names) do
 230         minetest.registered_aliases[name] = ""
 231         register_alias_raw(name, "")
 232 end
 233
 234
 235 -- Deprecated:
 236 -- Aliases for minetest.register_alias (how ironic...)
 237 --minetest.alias_node = minetest.register_alias
 238 --minetest.alias_tool = minetest.register_alias
 239 --minetest.alias_craftitem = minetest.register_alias
 240
 241 --
 242 -- Built-in node definitions. Also defined in C.
 243 --
 244
 245 minetest.register_item(":unknown", {
 246         type = "none",
 247         description = "Unknown Item",
 248         inventory_image = "unknown_item.png",
 249         on_place = minetest.item_place,
 250         on_drop = minetest.item_drop,
 251         groups = {not_in_creative_inventory=1},
 252 })
 253
 254 minetest.register_node(":air", {
 255         description = "Air (you hacker you!)",
 256         inventory_image = "unknown_node.png",
 257         wield_image = "unknown_node.png",
 258         drawtype = "airlike",
 259         paramtype = "light",
 260         sunlight_propagates = true,
 261         walkable = false,
 262         pointable = false,
 263         diggable = false,
 264         buildable_to = true,
 265         air_equivalent = true,
 266         drop = "",
 267         groups = {not_in_creative_inventory=1},
 268 })
 269
 270 minetest.register_node(":ignore", {
 271         description = "Ignore (you hacker you!)",
 272         inventory_image = "unknown_node.png",
 273         wield_image = "unknown_node.png",
 274         drawtype = "airlike",
 275         paramtype = "none",
 276         sunlight_propagates = false,
 277         walkable = false,
 278         pointable = false,
 279         diggable = false,
 280         buildable_to = true, -- A way to remove accidentally placed ignores
 281         air_equivalent = true,
 282         drop = "",
 283         groups = {not_in_creative_inventory=1},
 284 })
 285
 286 -- The hand (bare definition)
 287 minetest.register_item(":", {
 288         type = "none",
 289         groups = {not_in_creative_inventory=1},
 290 })
 291
 292 --
 293 -- Callback registration
 294 --
 295
 296 local function make_registration()
 297         local t = {}
 298         local registerfunc = function(func) table.insert(t, func) end
 299         return t, registerfunc
 300 end
 301
 302 local function make_registration_reverse()
 303         local t = {}
 304         local registerfunc = function(func) table.insert(t, 1, func) end
 305         return t, registerfunc
 306 end
 307
 308 minetest.registered_on_chat_messages, minetest.register_on_chat_message = make_registration()
 309 minetest.registered_globalsteps, minetest.register_globalstep = make_registration()
 310 minetest.registered_on_mapgen_inits, minetest.register_on_mapgen_init = make_registration()
 311 minetest.registered_on_shutdown, minetest.register_on_shutdown = make_registration()
 312 minetest.registered_on_punchnodes, minetest.register_on_punchnode = make_registration()
 313 minetest.registered_on_placenodes, minetest.register_on_placenode = make_registration()
 314 minetest.registered_on_dignodes, minetest.register_on_dignode = make_registration()
 315 minetest.registered_on_generateds, minetest.register_on_generated = make_registration()
 316 minetest.registered_on_newplayers, minetest.register_on_newplayer = make_registration()
 317 minetest.registered_on_dieplayers, minetest.register_on_dieplayer = make_registration()
 318 minetest.registered_on_respawnplayers, minetest.register_on_respawnplayer = make_registration()
 319 minetest.registered_on_joinplayers, minetest.register_on_joinplayer = make_registration()
 320 minetest.registered_on_leaveplayers, minetest.register_on_leaveplayer = make_registration()
 321 minetest.registered_on_player_receive_fields, minetest.register_on_player_receive_fields = make_registration_reverse()
 322