builtin/client/register.lua

   1
   2 core.callback_origins = {}
   3
   4 local getinfo = debug.getinfo
   5 debug.getinfo = nil
   6
   7 function core.run_callbacks(callbacks, mode, ...)
   8         assert(type(callbacks) == "table")
   9         local cb_len = #callbacks
  10         if cb_len == 0 then
  11                 if mode == 2 or mode == 3 then
  12                         return true
  13                 elseif mode == 4 or mode == 5 then
  14                         return false
  15                 end
  16         end
  17         local ret
  18         for i = 1, cb_len do
  19                 local cb_ret = callbacks[i](...)
  20
  21                 if mode == 0 and i == 1 or mode == 1 and i == cb_len then
  22                         ret = cb_ret
  23                 elseif mode == 2 then
  24                         if not cb_ret or i == 1 then
  25                                 ret = cb_ret
  26                         end
  27                 elseif mode == 3 then
  28                         if cb_ret then
  29                                 return cb_ret
  30                         end
  31                         ret = cb_ret
  32                 elseif mode == 4 then
  33                         if (cb_ret and not ret) or i == 1 then
  34                                 ret = cb_ret
  35                         end
  36                 elseif mode == 5 and cb_ret then
  37                         return cb_ret
  38                 end
  39         end
  40         return ret
  41 end
  42
  43 function core.override_item(name, redefinition)
  44         if redefinition.name ~= nil then
  45                 error("Attempt to redefine name of "..name.." to "..dump(redefinition.name), 2)
  46         end
  47         if redefinition.type ~= nil then
  48                 error("Attempt to redefine type of "..name.." to "..dump(redefinition.type), 2)
  49         end
  50         local itemdef = core.get_item_def(name)
  51         if not itemdef then
  52                 error("Attempt to override non-existent item "..name, 2)
  53         end
  54         local nodedef = core.get_node_def(name)
  55         table.combine(itemdef, nodedef)
  56
  57         for k, v in pairs(redefinition) do
  58                 rawset(itemdef, k, v)
  59         end
  60         core.register_item_raw(itemdef)
  61 end
  62
  63 --
  64 -- Callback registration
  65 --
  66
  67 local function make_registration()
  68         local t = {}
  69         local registerfunc = function(func)
  70                 t[#t + 1] = func
  71                 core.callback_origins[func] = {
  72                         mod = core.get_current_modname() or "??",
  73                         name = getinfo(1, "n").name or "??"
  74                 }
  75                 --local origin = core.callback_origins[func]
  76                 --print(origin.name .. ": " .. origin.mod .. " registering cbk " .. tostring(func))
  77         end
  78         return t, registerfunc
  79 end
  80
  81 core.registered_globalsteps, core.register_globalstep = make_registration()
  82 core.registered_on_mods_loaded, core.register_on_mods_loaded = make_registration()
  83 core.registered_on_shutdown, core.register_on_shutdown = make_registration()
  84 core.registered_on_receiving_chat_message, core.register_on_receiving_chat_message = make_registration()
  85 core.registered_on_sending_chat_message, core.register_on_sending_chat_message = make_registration()
  86 core.registered_on_death, core.register_on_death = make_registration()
  87 core.registered_on_hp_modification, core.register_on_hp_modification = make_registration()
  88 core.registered_on_damage_taken, core.register_on_damage_taken = make_registration()
  89 core.registered_on_formspec_input, core.register_on_formspec_input = make_registration()
  90 core.registered_on_dignode, core.register_on_dignode = make_registration()
  91 core.registered_on_punchnode, core.register_on_punchnode = make_registration()
  92 core.registered_on_placenode, core.register_on_placenode = make_registration()
  93 core.registered_on_item_use, core.register_on_item_use = make_registration()
  94 core.registered_on_modchannel_message, core.register_on_modchannel_message = make_registration()
  95 core.registered_on_modchannel_signal, core.register_on_modchannel_signal = make_registration()
  96 core.registered_on_inventory_open, core.register_on_inventory_open = make_registration()
  97 core.registered_on_recieve_physics_override, core.register_on_recieve_physics_override = make_registration()