Add EventEmitter support to wea_c.pos

worldeditadditions_core/core/lib/EventEmitter.lua

@@ -6,12 +6,11 @@ EventEmitter.__index = EventEmitter
 EventEmitter.__name = "EventEmitter" -- A hack to allow identification in wea.inspect
 
 
-function EventEmitter.new()
-	local result = {
-		events = {}
-	}
-	setmetatable(result, EventEmitter)
-	return result
+function EventEmitter.new(tbl)
+	if not tbl then tbl = {} end
+	tbl.events = {}
+	setmetatable(tbl, EventEmitter)
+	return tbl
 end
 
 function EventEmitter.addEventListener(this, event_name, func)

worldeditadditions_core/core/pos.lua

@@ -2,6 +2,7 @@ local wea_c = worldeditadditions_core
 
 local positions_count_limit = 999
 local positions = {}
+local anchor = nil
 
 local function ensure_player(player_name)
 	if player_name == nil then
@@ -36,28 +37,37 @@ local function set_pos(player_name, i, pos)
 	if i > positions_count_limit then return false end
 	ensure_player(player_name)
 	positions[player_name][i] = pos
+	anchor:emit("set", { i = i, pos = pos })
 	return true
 end
 local function set_pos_all(player_name, i, pos_list)
 	if #pos_list > positions_count_limit then return false end
 	positions[player_name] = pos_list
+	for _i,pos_new in ipairs(positions[player_name]) do
+		anchor:emit("push", { pos = pos_new })
+	end
 end
 local function clear(player_name)
 	if positions[player_name] then
 		positions[player_name] = nil
 	end
+	anchor:emit("clear")
 end
 local function pop_pos(player_name)
 	ensure_player(player_name)
 	if #positions[player_name] <= 0 then return nil end
-	return table.remove(positions[player_name])
+	local last_pos = table.remove(positions[player_name])
+	anchor:emit("pop", { pos = last_pos })
+	return last_pos
 end
 local function push_pos(player_name, pos)
 	ensure_player(player_name)
 	table.insert(positions[player_name], pos)
+	anchor:emit("push", { pos = pos })
 end
 
-return {
+
+anchor = wea_c.EventEmitter.new({
 	get = get_pos,
 	get1 = get_pos1,
 	get2 = get_pos2,
@@ -67,5 +77,7 @@ return {
 	pop = pop_pos,
 	push = push_pos,
 	set = set_pos,
-	set_all = set_pos_all,
-}
+	set_all = set_pos_all
+})
+
+return anchor

worldeditadditions_core/init.lua

@@ -21,13 +21,13 @@ worldeditadditions_core = {
 	-- The default limit for new players on the number of potential nodes changed before safe_region kicks in.
 	safe_region_limit_default = 100000,
 }
-
 local wea_c = worldeditadditions_core
+wea_c.EventEmitter = dofile(modpath.."/core/lib/EventEmitter.lua")
+wea_c.pos = dofile(modpath.."/core/pos.lua")
+
 wea_c.register_command = dofile(modpath.."/core/register_command.lua")
 wea_c.fetch_command_def = dofile(modpath.."/core/fetch_command_def.lua")
 wea_c.register_alias = dofile(modpath.."/core/register_alias.lua")
-wea_c.pos = dofile(modpath.."/core/pos.lua")
-wea_c.EventEmitter = dofile(modpath.."/core/lib/EventEmitter.lua")
 print("WEA_C pos", wea_c.pos.push)
 
 -- Initialise WorldEdit stuff if the WorldEdit mod is not present