builtin/client/register.lua

   1
   2 core.callback_origins = {}
   3
   4 function core.run_callbacks(callbacks, mode, ...)
   5         assert(type(callbacks) == "table")
   6         local cb_len = #callbacks
   7         if cb_len == 0 then
   8                 if mode == 2 or mode == 3 then
   9                         return true
  10                 elseif mode == 4 or mode == 5 then
  11                         return false
  12                 end
  13         end
  14         local ret
  15         for i = 1, cb_len do
  16                 local cb_ret = callbacks[i](...)
  17
  18                 if mode == 0 and i == 1 or mode == 1 and i == cb_len then
  19                         ret = cb_ret
  20                 elseif mode == 2 then
  21                         if not cb_ret or i == 1 then
  22                                 ret = cb_ret
  23                         end
  24                 elseif mode == 3 then
  25                         if cb_ret then
  26                                 return cb_ret
  27                         end
  28                         ret = cb_ret
  29                 elseif mode == 4 then
  30                         if (cb_ret and not ret) or i == 1 then
  31                                 ret = cb_ret
  32                         end
  33                 elseif mode == 5 and cb_ret then
  34                         return cb_ret
  35                 end
  36         end
  37         return ret
  38 end
  39
  40 --
  41 -- Callback registration
  42 --
  43
  44 local function make_registration()
  45         local t = {}
  46         local registerfunc = function(func)
  47                 t[#t + 1] = func
  48                 core.callback_origins[func] = {
  49                         mod = core.get_current_modname() or "??",
  50                         name = debug.getinfo(1, "n").name or "??"
  51                 }
  52                 --local origin = core.callback_origins[func]
  53                 --print(origin.name .. ": " .. origin.mod .. " registering cbk " .. tostring(func))
  54         end
  55         return t, registerfunc
  56 end
  57
  58 core.registered_globalsteps, core.register_globalstep = make_registration()
  59 core.registered_on_shutdown, core.register_on_shutdown = make_registration()
  60 core.registered_on_receiving_chat_messages, core.register_on_receiving_chat_messages = make_registration()
  61 core.registered_on_sending_chat_messages, core.register_on_sending_chat_messages = make_registration()
  62 core.registered_on_death, core.register_on_death = make_registration()
  63 core.registered_on_hp_modification, core.register_on_hp_modification = make_registration()
  64 core.registered_on_damage_taken, core.register_on_damage_taken = make_registration()
  65 core.registered_on_formspec_input, core.register_on_formspec_input = make_registration()
  66
  67