minetest/builtin/common/register.lua

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local builtin_shared = ...
do
local default = {mod = "??", name = "??"}
core.callback_origins = setmetatable({}, {
__index = function()
return default
end
})
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 origin = core.callback_origins[callbacks[i]]
core.set_last_run_mod(origin.mod)
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
function builtin_shared.make_registration()
local t = {}
local registerfunc = function(func)
t[#t + 1] = func
core.callback_origins[func] = {
mod = core.get_current_modname() or "??",
name = debug.getinfo(1, "n").name or "??"
}
end
return t, registerfunc
end
function builtin_shared.make_registration_reverse()
local t = {}
local registerfunc = function(func)
table.insert(t, 1, func)
core.callback_origins[func] = {
mod = core.get_current_modname() or "??",
name = debug.getinfo(1, "n").name or "??"
}
end
return t, registerfunc
end