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README.md

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+##Adds an event for when player presses a key.
+
+###This mod is client- and server-side.
+
+###Added functions are:
+`keyevent.register_on_keypress_bits(keys, old_keys, dtime, player_name)`
+`keys`: The pressed keys in bit format.
+`old_keys`: The keys pressed before.
+`dtime`: Time from last check.
+`player_name`: Name of the player. Client-side this is `nil`.
+
+`keyevent.register_on_keypress(keys, old_keys, dtime, player_name)`
+Same as above but `keys` and `old_keys` is given in table format.
+

description.txt

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+Adds an event for when player presses a key.

init.lua

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+--[[
+ __                                           __
+|  | __ ____ ___.__. _______  __ ____   _____/  |_
+|  |/ // __ <   |  |/ __ \  \/ // __ \ /    \   __\
+|    <\  ___/\___  \  ___/\   /\  ___/|   |  \  |
+|__|_ \\___  > ____|\___  >\_/  \___  >___|  /__|
+     \/    \/\/         \/          \/     \/
+--]]
+
+local load_time_start = os.clock()
+local modname = minetest.get_current_modname()
+
+
+keyevent = {}
+local keyevents_bits = {}
+function keyevent.register_on_keypress_bits(func)
+	keyevents_bits[#keyevents_bits+1] = func
+end
+local keyevents = {}
+function keyevent.register_on_keypress(func)
+	keyevents[#keyevents+1] = func
+end
+
+local function bits_to_table(bits)
+	if type(bits) ~= "number" then
+		return bits
+	end
+	local meaning = {
+		[0] = "up", "down", "left",
+		"right", "jump", "aux1",
+		"sneak", "LMB", "RMB"
+	}
+	local t = {}
+	for i = 8, 0, -1 do
+		local n = 2^i
+		if bits >= n then
+			bits = bits - n
+			t[meaning[i]] = true
+		else
+			t[meaning[i]] = false
+		end
+	end
+	return t
+end
+
+local function on_step(dtime, player, old_keys, keys, player_name)
+	if keys == old_keys then
+		return
+	end
+	for i = 1, #keyevents_bits do
+		keyevents_bits[i](keys, old_keys, dtime, player_name)
+	end
+	local keys_t = bits_to_table(keys)
+	local old_keys_t = bits_to_table(old_keys)
+	for i = 1, #keyevents do
+		keyevents[i](keys_t, old_keys_t, dtime, player_name)
+	end
+	return keys
+end
+
+if INIT == "client" then
+	local localplayer
+	minetest.register_on_connect(function()
+		localplayer = minetest.localplayer
+	end)
+
+	local keys
+	local f = on_step
+	function on_step(dtime)
+		if not localplayer then
+			return
+		end
+		keys = f(dtime, localplayer, keys, localplayer:get_key_pressed()) or keys
+	end
+
+elseif INIT == "game" then
+	local keys = {}
+	local f = on_step
+	function on_step(dtime)
+		local players = minetest.get_connected_players()
+		for i = 1, #players do
+			local player_name = players[i]:get_player_name()
+			keys[player_name] = f(dtime, players[i], keys[player_name],
+					players[i]:get_player_control_bits(), player_name) or
+					keys[player_name]
+		end
+	end
+
+else
+	function on_step()
+	end
+end
+
+minetest.register_globalstep(on_step)
+
+
+local time = math.floor(tonumber(os.clock()-load_time_start)*100+0.5)/100
+local msg = "["..modname.."] loaded after ca. "..time
+if time > 0.05 then
+	print(msg)
+else
+	minetest.log("info", msg)
+end

mod.conf

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+name = keyevent