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 --
  44 -- Callback registration
  45 --
  46
  47 local function make_registration()
  48         local t = {}
  49         local registerfunc = function(func)
  50                 t[#t + 1] = func
  51                 core.callback_origins[func] = {
  52                         mod = core.get_current_modname() or "??",
  53                         name = getinfo(1, "n").name or "??"
  54                 }
  55                 --local origin = core.callback_origins[func]
  56                 --print(origin.name .. ": " .. origin.mod .. " registering cbk " .. tostring(func))
  57         end
  58         return t, registerfunc
  59 end
  60
  61 core.registered_globalsteps, core.register_globalstep = make_registration()
  62 core.registered_on_shutdown, core.register_on_shutdown = make_registration()
  63 core.registered_on_connect, core.register_on_connect = make_registration()
  64 core.registered_on_receiving_chat_message, core.register_on_receiving_chat_message = make_registration()
  65 core.registered_on_sending_chat_message, core.register_on_sending_chat_message = make_registration()
  66 core.registered_on_death, core.register_on_death = make_registration()
  67 core.registered_on_hp_modification, core.register_on_hp_modification = make_registration()
  68 core.registered_on_damage_taken, core.register_on_damage_taken = make_registration()
  69 core.registered_on_formspec_input, core.register_on_formspec_input = make_registration()
  70 core.registered_on_dignode, core.register_on_dignode = make_registration()
  71 core.registered_on_punchnode, core.register_on_punchnode = make_registration()
  72 core.registered_on_placenode, core.register_on_placenode = make_registration()
  73 core.registered_on_item_use, core.register_on_item_use = make_registration()