Add [inventory_icon] mod

mods/inventory_icon/README.txt

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+Inventory Icon
+==============
+Version: 1.0.1
+
+This simple mod adds an icon to the player's HUD which shows how many inventory slots are available and how many of them are occupied.
+
+This mod also supports the Unified Inventory mod. If this mod is used, icons for each bag are displayed, too.
+
+
+----------------
+
+License of code:
+WTFPL
+
+License of media files:
+CC-BY-SA 3.0 Unported
+
+Authors:
+- inventory_icon_backpack_free.png: DitsyDM and Traipse OpenRPG (CC-BY-SA 3.0 Unported)
+- inventory_icon_backpack_full.png: DitsyDM, Traipse OpenRPG and Wuzzy (CC-BY-SA 3.0 Unported)
+- inventory_icon_bags_small.png: Tonyka (New BSD License)
+- inventory_icon_bags_medium.png: Tonyka (New BSD License) 
+- inventory_icon_bags_large.png: Tonyka (New BSD License)

mods/inventory_icon/depends.txt

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+unified_inventory?

mods/inventory_icon/description.txt

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+Shows a little backpack icon in the HUD, which shows how many slots are available and free in the player inventory.

mods/inventory_icon/init.lua

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+inventory_icon = {}
+inventory_icon.hudids = {}
+
+inventory_icon.COLORIZE_STRING = "[colorize:#A00000:192"
+
+function inventory_icon.get_inventory_state(inv, listname)
+	local size = inv:get_size(listname)
+	local occupied = 0
+	for i=1,size do
+		local stack = inv:get_stack(listname, i)
+		if not stack:is_empty() then
+			occupied = occupied + 1
+		end
+	end
+	return occupied, size
+end
+
+function inventory_icon.replace_icon(name)
+	return "inventory_icon_"..name
+end
+
+minetest.register_on_joinplayer(function(player)
+	local name = player:get_player_name()
+	inventory_icon.hudids[name] = {}
+	local occupied, size = inventory_icon.get_inventory_state(player:get_inventory(), "main")
+	local icon
+	if occupied >= size then
+		icon = "inventory_icon_backpack_full.png"
+	else
+		icon = "inventory_icon_backpack_free.png"
+	end
+	inventory_icon.hudids[name].main = {}
+	inventory_icon.hudids[name].main.icon = player:hud_add({
+		hud_elem_type = "image",
+		position = {x=1,y=1},
+		scale = {x=1,y=1},
+		offset = {x=-32,y=-32},
+		text = icon,
+	})
+	inventory_icon.hudids[name].main.text = player:hud_add({
+		hud_elem_type = "text",
+		position = {x=1,y=1},
+		scale = {x=1,y=1},
+		offset = {x=-36,y=-20},
+		alignment = {x=0,y=0},
+		number = 0xFFFFFF,
+		text = string.format("%d/%d", occupied, size)
+	})
+	if minetest.get_modpath("unified_inventory") ~= nil then
+		inventory_icon.hudids[name].bags = {}
+		local bags_inv = minetest.get_inventory({type = "detached", name = name.."_bags"})
+		for i=1,4 do
+			local bag = bags_inv:get_stack("bag"..i, 1)
+			local scale, text, icon
+			if bag:is_empty() then
+				scale = { x = 0, y = 0 }
+				text = ""
+				icon = "inventory_icon_bags_small.png"
+			else
+				scale = { x = 1, y = 1 }
+				local occupied, size = inventory_icon.get_inventory_state(player:get_inventory(), "bag"..i.."contents")
+				text = string.format("%d/%d", occupied, size)
+				icon = inventory_icon.replace_icon(minetest.registered_items[bag:get_name()].inventory_image)
+				if occupied >= size then
+					icon = icon .. "^" .. inventory_icon.COLORIZE_STRING
+				end
+			end
+			inventory_icon.hudids[name].bags[i] = {}
+			inventory_icon.hudids[name].bags[i].icon = player:hud_add({
+				hud_elem_type = "image",
+				position = {x=1,y=1},
+				scale = scale,
+				size = { x=32, y=32 },
+				offset = {x=-36,y=-32 -40*i},
+				text = icon,
+			})
+			inventory_icon.hudids[name].bags[i].text = player:hud_add({
+				hud_elem_type = "text",
+				position = {x=1,y=1},
+				scale = scale,
+				offset = {x=-36,y=-20 -40*i},
+				alignment = {x=0,y=0},
+				number = 0xFFFFFF,
+				text = text,
+			})
+		end
+	end
+end)
+
+minetest.register_on_leaveplayer(function(player)
+	inventory_icon.hudids[player:get_player_name()] = nil
+end)
+
+inventory_icon.timer = 0
+minetest.register_globalstep(function(dtime)
+	inventory_icon.timer = inventory_icon.timer + dtime
+	if inventory_icon.timer > 1 then
+		for playername,hudids in pairs(inventory_icon.hudids) do
+			local player = minetest.get_player_by_name(playername)
+			local occupied, size = inventory_icon.get_inventory_state(player:get_inventory(), "main")
+			local icon, color
+			if occupied >= size then
+				icon = "inventory_icon_backpack_full.png"
+			else
+				icon = "inventory_icon_backpack_free.png"
+			end
+			player:hud_change(hudids.main.icon, "text", icon)
+			player:hud_change(hudids.main.text, "text", string.format("%d/%d", occupied, size))
+
+			if minetest.get_modpath("unified_inventory") ~= nil then
+				local bags_inv = minetest.get_inventory({type = "detached", name = playername.."_bags"})
+				for i=1,4 do
+					local bag = bags_inv:get_stack("bag"..i, 1)
+					local scale, text, icon
+					if bag:is_empty() then
+						scale = { x = 0, y = 0 }
+						text = ""
+						icon = "inventory_icon_bags_small.png"
+					else
+						scale = { x = 1, y = 1 }
+						local occupied, size = inventory_icon.get_inventory_state(player:get_inventory(), "bag"..i.."contents")
+						text = string.format("%d/%d", occupied, size)
+						icon = inventory_icon.replace_icon(minetest.registered_items[bag:get_name()].inventory_image)
+						if occupied >= size then
+							icon = icon .. "^" .. inventory_icon.COLORIZE_STRING
+						end
+					end
+					player:hud_change(inventory_icon.hudids[playername].bags[i].icon, "text", icon)
+					player:hud_change(inventory_icon.hudids[playername].bags[i].icon, "scale", scale)
+
+					player:hud_change(inventory_icon.hudids[playername].bags[i].text, "text", text)
+					player:hud_change(inventory_icon.hudids[playername].bags[i].text, "scale", scale)
+				end
+			end
+		end
+		inventory_icon.timer = 0
+	end
+end)