Static graveyard inventory

- Added graveyard inventory for reserved_items. Next thing to add : mechanism to get them out when shifting class

mods/pclasses/inventory.lua

@@ -0,0 +1,50 @@
+------------------------
+-- PClasses' inventory
+--
+
+-- Inventory for 'dead' items
+pclasses.api.create_graveyard_inventory = function(player)
+	local pname = player:get_player_name()
+	local player_inv = minetest.get_inventory({type = "player", name = pname})
+	local grave_inv = minetest.create_detached_inventory(pname .. "_graveyard", {
+		on_take = function(inv, listname, index, stack, player)
+			player_inv:set_stack(listname, index, nil)
+		end,
+		on_move = function(inv, from_list, from_index, to_list, to_index, count, player)
+			local stack = inv:get_stack(to_list, to_index)
+			player_inv:set_stack(to_list, to_index, stack)
+			player_inv:set_stack(from_list, from_index, nil)
+		end,
+		allow_take = function(inv, listname, index, stack, player)
+			return 0
+		end,
+		allow_move = function(inv, from_list, from_index, to_list, to_index, count, player)
+			return 0
+		end,
+		allow_put = function(inv, listname, index, stack, player)
+			return 0
+		end,
+	})
+	grave_inv:set_size("graveyard", 7*8)
+	player_inv:set_size("graveyard", 7*8)
+	for i = 1,56 do
+		local stack = player_inv:get_stack("graveyard", i)
+		grave_inv:set_stack("graveyard", i, stack)
+	end
+end
+
+unified_inventory.register_button("graveyard", {
+	type = "image",
+	image = "pclasses_grave_button.png",
+	tooltip = "Item Graveyard",
+})
+
+unified_inventory.register_page("graveyard", {
+	get_formspec = function(player)
+		local pname = player:get_player_name()
+		local form = "label[0,0;Graveyard]" ..
+			"list[detached:" .. pname .. "_graveyard;graveyard;1,1;7,8]"
+		return {formspec = form, draw_inventory = false}
+	end
+})
+