Add Ukrainian localization (#258)

`unified_inventory.is_itemdef_listable` already prevents such items
being listed. They are not needed, thus removing them from the
categories in the first place does make sense.

Co-authored-by: SmallJoker <mk939@ymail.com>

.luacheckrc

@@ -10,10 +10,12 @@ read_globals = {
 	string = {fields = {"split", "trim"}},
 	table = {fields = {"copy", "getn"}},
 
+	"dump",
 	"minetest", "vector",
 	"ItemStack", "datastorage",
 
 	"hb",
+	"doors",
 }
 
 files["callbacks.lua"].ignore = { "player", "draw_lite_mode" }

README.md

@@ -15,7 +15,8 @@ Unified Inventory replaces the default survival and creative inventory.
     * Recipe search function by ingredients
  * Up to four bags with up to 24 slots each
  * Home function to teleport
- * Trash slot
+ * Trash slot and refill slot for creative
+ * Waypoints to keep track of important locations
  * Lite mode: reduces the item browser width
     * `minetest.conf` setting `unified_inventory_lite = true`
  * Mod API for modders: see [mod_api.txt](doc/mod_api.txt)
@@ -24,7 +25,11 @@ Unified Inventory replaces the default survival and creative inventory.
 
 ## Requirements
 
- * Minetest 5.0.0+
+ * Minetest 5.4.0+
+ * Mod `default` for category filters (contained in Minetest Game)
+ * Mod `farming` for craftable bags (contained in Minetest Game)
+ * For waypoint migration: `datastorage`
+
 
 # Licenses
 
@@ -66,6 +71,9 @@ From http://www.clker.com (Public Domain, CC-BY-4.0):
   * [`ui_pencil_icon.pnc`](http://www.clker.com/clipart-2256.html)
   * [`ui_waypoint_set_icon.png`](http://www.clker.com/clipart-larger-flag.html)
 
+From https://www.svgrepo.com (CC-BY)
+  * [`ui_teleport.png`](https://www.svgrepo.com/svg/321565/teleport)
+
 Everaldo Coelho (YellowIcon) (LGPL v2.1+):
 
   * [`ui_craftguide_icon.png` / `ui_craft_icon.png`](http://commons.wikimedia.org/wiki/File:Advancedsettings.png)
@@ -96,4 +104,17 @@ Other files from Wikimedia Commons:
 
 RealBadAngel: (CC-BY-4.0)
 
-  * Everything else.
+  * Everything else.
+
+
+## Sounds
+
+ * [`bell.ogg`](https://freesound.org/people/bennstir/sounds/81072/) by bennstir, CC 4.0
+ * [`electricity.ogg`](https://freesound.org/people/Halleck/sounds/19486/) by Halleck, CC 4.0 (cut)
+ * [`pageflip1.ogg`](https://freesound.org/people/themfish/sounds/45823/) by themfish, CC 4.0 (cut, slowed down)
+ * `pageflip2.ogg` (derived from `pageflip1.ogg`)
+ * [`trash.ogg`](https://freesound.org/people/OwlStorm/sounds/151231/) by OwlStorm, CC 0 (speed up)
+ * [`trash_all.ogg`](https://freesound.org/people/abel_K/sounds/68280/) by abel_K, Sampling Plus 1.0 (speed up)
+ * [`ui_click.ogg`](https://freesound.org/people/lartti/sounds/527569/) by lartti, CC 0 (cut)
+ * [`ui_morning.ogg`](https://freesound.org/people/InspectorJ/sounds/439472/) by InspectorJ, CC 4.0
+ * [`ui_owl.ogg`](https://freesound.org/people/manda_g/sounds/54987/) by manda_g, Sampling Plus 1.0 (cut)

api.lua

@@ -1,55 +1,69 @@
 local S = minetest.get_translator("unified_inventory")
 local F = minetest.formspec_escape
+local ui = unified_inventory
+
+local function is_recipe_craftable(recipe)
+	-- Ensure the ingedients exist
+	for _, itemname in pairs(recipe.items) do
+		local groups = string.find(itemname, "group:")
+		if groups then
+			if not ui.get_group_item(string.sub(groups, 8)).item then
+				return false
+			end
+		else
+			-- Possibly an item
+			local itemname_cleaned = ItemStack(itemname):get_name()
+			if not minetest.registered_items[itemname_cleaned]
+					or minetest.get_item_group(itemname_cleaned, "not_in_craft_guide") ~= 0 then
+				return false
+			end
+		end
+	end
+	return true
+end
 
 -- Create detached creative inventory after loading all mods
 minetest.after(0.01, function()
 	local rev_aliases = {}
-	for source, target in pairs(minetest.registered_aliases) do
-		if not rev_aliases[target] then rev_aliases[target] = {} end
-		table.insert(rev_aliases[target], source)
+	for original, newname in pairs(minetest.registered_aliases) do
+		if not rev_aliases[newname] then
+			rev_aliases[newname] = {}
+		end
+		table.insert(rev_aliases[newname], original)
 	end
-	unified_inventory.items_list = {}
+
+	-- Filtered item list
+	ui.items_list = {}
 	for name, def in pairs(minetest.registered_items) do
-		if (not def.groups.not_in_creative_inventory or
-		   def.groups.not_in_creative_inventory == 0) and
-		   def.description and def.description ~= "" then
-			table.insert(unified_inventory.items_list, name)
+		if ui.is_itemdef_listable(def) then
+			table.insert(ui.items_list, name)
+
+			-- Alias processing: Find recipes that belong to the current item name
 			local all_names = rev_aliases[name] or {}
 			table.insert(all_names, name)
-			for _, player_name in ipairs(all_names) do
-				local recipes = minetest.get_all_craft_recipes(player_name)
-				if recipes then
-					for _, recipe in ipairs(recipes) do
-
-						local unknowns
-
-						for _,chk in pairs(recipe.items) do
-							local groupchk = string.find(chk, "group:")
-							if (not groupchk and not minetest.registered_items[chk])
-							  or (groupchk and not unified_inventory.get_group_item(string.gsub(chk, "group:", "")).item)
-							  or minetest.get_item_group(chk, "not_in_craft_guide") ~= 0 then
-								unknowns = true
-							end
-						end
-
-						if not unknowns then
-							unified_inventory.register_craft(recipe)
-						end
+			for _, itemname in ipairs(all_names) do
+				local recipes = minetest.get_all_craft_recipes(itemname)
+				for _, recipe in ipairs(recipes or {}) do
+					if is_recipe_craftable(recipe) then
+						ui.register_craft(recipe)
 					end
 				end
 			end
 		end
 	end
-	table.sort(unified_inventory.items_list)
-	unified_inventory.items_list_size = #unified_inventory.items_list
-	print("Unified Inventory. inventory size: "..unified_inventory.items_list_size)
-	for _, name in ipairs(unified_inventory.items_list) do
+
+	table.sort(ui.items_list)
+	ui.items_list_size = #ui.items_list
+	print("Unified Inventory. Inventory size: "..ui.items_list_size)
+
+	-- Analyse dropped items -> custom "digging" recipes
+	for _, name in ipairs(ui.items_list) do
 		local def = minetest.registered_items[name]
 		-- Simple drops
 		if type(def.drop) == "string" then
 			local dstack = ItemStack(def.drop)
 			if not dstack:is_empty() and dstack:get_name() ~= name then
-				unified_inventory.register_craft({
+				ui.register_craft({
 					type = "digging",
 					items = {name},
 					output = def.drop,
@@ -115,7 +129,7 @@ minetest.after(0.01, function()
 				end
 			end
 			for itemstring, count in pairs(drop_guaranteed) do
-				unified_inventory.register_craft({
+				ui.register_craft({
 					type = "digging",
 					items = {name},
 					output = itemstring .. " " .. count,
@@ -123,7 +137,7 @@ minetest.after(0.01, function()
 				})
 			end
 			for itemstring, count in pairs(drop_maybe) do
-				unified_inventory.register_craft({
+				ui.register_craft({
 					type = "digging_chance",
 					items = {name},
 					output = itemstring .. " " .. count,
@@ -132,33 +146,86 @@ minetest.after(0.01, function()
 			end
 		end
 	end
-	for _, recipes in pairs(unified_inventory.crafts_for.recipe) do
+
+	-- Step 1: Initialize cache for looking up groups
+	unified_inventory.init_matching_cache()
+
+	-- Step 2: Find all matching items for the given spec (groups)
+	local get_matching_spec_items = unified_inventory.get_matching_items
+
+	for outputitemname, recipes in pairs(ui.crafts_for.recipe) do
+		-- List of crafts that return this item string (variable "_")
+
+		-- Problem: The group cache must be initialized after all mods finished loading
+		-- thus, invalid recipes might be indexed. Hence perform filtering with `new_recipe_list`
+		local new_recipe_list = {}
 		for _, recipe in ipairs(recipes) do
 			local ingredient_items = {}
 			for _, spec in pairs(recipe.items) do
-				local matches_spec = unified_inventory.canonical_item_spec_matcher(spec)
-				for _, name in ipairs(unified_inventory.items_list) do
-					if matches_spec(name) then
-						ingredient_items[name] = true
-					end
+				-- Get items that fit into this spec (group or item name)
+				local specname = ItemStack(spec):get_name()
+				for item_name, _ in pairs(get_matching_spec_items(specname)) do
+					ingredient_items[item_name] = true
 				end
 			end
 			for name, _ in pairs(ingredient_items) do
-				if unified_inventory.crafts_for.usage[name] == nil then
-					unified_inventory.crafts_for.usage[name] = {}
+				if not ui.crafts_for.usage[name] then
+					ui.crafts_for.usage[name] = {}
 				end
-				table.insert(unified_inventory.crafts_for.usage[name], recipe)
+				table.insert(ui.crafts_for.usage[name], recipe)
+			end
+
+			if next(ingredient_items) then
+				-- There's at least one known ingredient: mark as good recipe
+				-- PS: What whatll be done about partially incomplete recipes?
+				table.insert(new_recipe_list, recipe)
+			end
+		end
+		ui.crafts_for.recipe[outputitemname] = new_recipe_list
+	end
+
+	-- Remove unknown items from all categories
+	local total_removed = 0
+	for cat_name, cat_def in pairs(ui.registered_category_items) do
+		for itemname, _ in pairs(cat_def) do
+			local idef = minetest.registered_items[itemname]
+			if not idef then
+				total_removed = total_removed + 1
+				--[[
+				-- For analysis
+				minetest.log("warning", "[unified_inventory] Removed item '"
+					.. itemname .. "' from category '" .. cat_name
+					.. "'. Reason: item not registered")
+				]]
+				cat_def[itemname] = nil
+			elseif not ui.is_itemdef_listable(idef) then
+				total_removed = total_removed + 1
+				--[[
+				-- For analysis
+				minetest.log("warning", "[unified_inventory] Removed item '"
+					.. itemname .. "' from category '" .. cat_name
+					.. "'. Reason: item is in 'not_in_creative_inventory' group")
+				]]
+				cat_def[itemname] = nil
 			end
 		end
 	end
+	if total_removed > 0 then
+		minetest.log("info", "[unified_inventory] Removed " .. total_removed ..
+			" items from the categories.")
+	end
+
+	for _, callback in ipairs(ui.initialized_callbacks) do
+		callback()
+	end
 end)
 
+---------------- Home API ----------------
 
--- load_home
 local function load_home()
-	local input = io.open(unified_inventory.home_filename, "r")
+	local input = io.open(ui.home_filename, "r")
 	if not input then
-		unified_inventory.home_pos = {}
+		ui.home_pos = {}
 		return
 	end
 	while true do
@@ -167,25 +234,32 @@ local function load_home()
 		local y = input:read("*n")
 		local z = input:read("*n")
 		local name = input:read("*l")
-		unified_inventory.home_pos[name:sub(2)] = {x = x, y = y, z = z}
+		ui.home_pos[name:sub(2)] = {x = x, y = y, z = z}
 	end
 	io.close(input)
 end
+
 load_home()
 
-function unified_inventory.set_home(player, pos)
+function ui.set_home(player, pos)
 	local player_name = player:get_player_name()
-	unified_inventory.home_pos[player_name] = vector.round(pos)
+	ui.home_pos[player_name] = vector.round(pos)
+
 	-- save the home data from the table to the file
-	local output = io.open(unified_inventory.home_filename, "w")
-	for k, v in pairs(unified_inventory.home_pos) do
+	local output = io.open(ui.home_filename, "w")
+	if not output then
+		minetest.log("warning", "[unified_inventory] Failed to save file: "
+			.. ui.home_filename)
+		return
+	end
+	for k, v in pairs(ui.home_pos) do
 		output:write(v.x.." "..v.y.." "..v.z.." "..k.."\n")
 	end
 	io.close(output)
 end
 
-function unified_inventory.go_home(player)
-	local pos = unified_inventory.home_pos[player:get_player_name()]
+function ui.go_home(player)
+	local pos = ui.home_pos[player:get_player_name()]
 	if pos then
 		player:set_pos(pos)
 		return true
@@ -193,8 +267,9 @@ function unified_inventory.go_home(player)
 	return false
 end
 
--- register_craft
-function unified_inventory.register_craft(options)
+---------------- Crafting API ----------------
+
+function ui.register_craft(options)
 	if not options.output then
 		return
 	end
@@ -205,12 +280,16 @@ function unified_inventory.register_craft(options)
 	if options.type == "normal" and options.width == 0 then
 		options = { type = "shapeless", items = options.items, output = options.output, width = 0 }
 	end
-	if not unified_inventory.crafts_for.recipe[itemstack:get_name()] then
-		unified_inventory.crafts_for.recipe[itemstack:get_name()] = {}
+	local item_name = itemstack:get_name()
+	if not ui.crafts_for.recipe[item_name] then
+		ui.crafts_for.recipe[item_name] = {}
 	end
-	table.insert(unified_inventory.crafts_for.recipe[itemstack:get_name()],options)
-end
+	table.insert(ui.crafts_for.recipe[item_name],options)
 
+	for _, callback in ipairs(ui.craft_registered_callbacks) do
+		callback(item_name, options)
+	end
+end
 
 local craft_type_defaults = {
 	width = 3,
@@ -218,8 +297,7 @@ local craft_type_defaults = {
 	uses_crafting_grid = false,
 }
 
-
-function unified_inventory.craft_type_defaults(name, options)
+function ui.craft_type_defaults(name, options)
 	if not options.description then
 		options.description = name
 	end
@@ -228,13 +306,12 @@ function unified_inventory.craft_type_defaults(name, options)
 end
 
 
-function unified_inventory.register_craft_type(name, options)
-	unified_inventory.registered_craft_types[name] =
-			unified_inventory.craft_type_defaults(name, options)
+function ui.register_craft_type(name, options)
+	ui.registered_craft_types[name] = ui.craft_type_defaults(name, options)
 end
 
 
-unified_inventory.register_craft_type("normal", {
+ui.register_craft_type("normal", {
 	description = F(S("Crafting")),
 	icon = "ui_craftgrid_icon.png",
 	width = 3,
@@ -250,7 +327,7 @@ unified_inventory.register_craft_type("normal", {
 })
 
 
-unified_inventory.register_craft_type("shapeless", {
+ui.register_craft_type("shapeless", {
 	description = F(S("Mixing")),
 	icon = "ui_craftgrid_icon.png",
 	width = 3,
@@ -265,7 +342,7 @@ unified_inventory.register_craft_type("shapeless", {
 })
 
 
-unified_inventory.register_craft_type("cooking", {
+ui.register_craft_type("cooking", {
 	description = F(S("Cooking")),
 	icon = "default_furnace_front.png",
 	width = 1,
@@ -273,37 +350,96 @@ unified_inventory.register_craft_type("cooking", {
 })
 
 
-unified_inventory.register_craft_type("digging", {
+ui.register_craft_type("digging", {
 	description = F(S("Digging")),
 	icon = "default_tool_steelpick.png",
 	width = 1,
 	height = 1,
 })
 
-unified_inventory.register_craft_type("digging_chance", {
+ui.register_craft_type("digging_chance", {
 	description = "Digging (by chance)",
 	icon = "default_tool_steelpick.png^[transformFY.png",
 	width = 1,
 	height = 1,
 })
 
-function unified_inventory.register_page(name, def)
-	unified_inventory.pages[name] = def
+---------------- GUI registrations ----------------
+
+function ui.register_page(name, def)
+	ui.pages[name] = def
 end
 
 
-function unified_inventory.register_button(name, def)
+function ui.register_button(name, def)
 	if not def.action then
 		def.action = function(player)
-			unified_inventory.set_inventory_formspec(player, name)
+			ui.set_inventory_formspec(player, name)
 		end
 	end
 	def.name = name
-	table.insert(unified_inventory.buttons, def)
+	table.insert(ui.buttons, def)
 end
 
+---------------- Callback registrations ----------------
 
-function unified_inventory.is_creative(playername)
+function ui.register_on_initialized(callback)
+	if type(callback) ~= "function" then
+		error(("Initialized callback must be a function, %s given."):format(type(callback)))
+	end
+	table.insert(ui.initialized_callbacks, callback)
+end
+
+function ui.register_on_craft_registered(callback)
+	if type(callback) ~= "function" then
+		error(("Craft registered callback must be a function, %s given."):format(type(callback)))
+	end
+	table.insert(ui.craft_registered_callbacks, callback)
+end
+
+---------------- List getters ----------------
+
+function ui.get_recipe_list(output)
+	return ui.crafts_for.recipe[output]
+end
+
+function ui.get_registered_outputs()
+	local outputs = {}
+	for item_name, _ in pairs(ui.crafts_for.recipe) do
+		table.insert(outputs, item_name)
+	end
+	return outputs
+end
+
+---------------- Player utilities ----------------
+
+function ui.is_creative(playername)
 	return minetest.check_player_privs(playername, {creative=true})
 		or minetest.settings:get_bool("creative_mode")
 end
+
+---------------- Formspec helpers ----------------
+
+function ui.single_slot(xpos, ypos, bright)
+	return string.format("background9[%f,%f;%f,%f;ui_single_slot%s.png;false;16]",
+	xpos, ypos, ui.imgscale, ui.imgscale, (bright and "_bright" or "") )
+end
+
+function ui.make_trash_slot(xpos, ypos)
+	return
+		ui.single_slot(xpos, ypos)..
+		"image["..xpos..","..ypos..";1.25,1.25;ui_trash_slot_icon.png]"..
+		"list[detached:trash;main;"..(xpos + ui.list_img_offset)..","..(ypos + ui.list_img_offset)..";1,1;]"
+end
+
+function ui.make_inv_img_grid(xpos, ypos, width, height, bright)
+	local tiled = {}
+	local n=1
+	for y = 0, (height - 1) do
+		for x = 0, (width -1) do
+			tiled[n] = ui.single_slot(xpos + (ui.imgscale * x), ypos + (ui.imgscale * y), bright)
+			n = n + 1
+		end
+	end
+	return table.concat(tiled)
+end

bags.lua

@@ -7,33 +7,36 @@ License: GPLv3
 
 local S = minetest.get_translator("unified_inventory")
 local F = minetest.formspec_escape
-local bags_inv_bg_prefix = "image[-0.1,1.0;10.05,"
+local ui = unified_inventory
 
-unified_inventory.register_page("bags", {
-	get_formspec = function(player)
+ui.register_page("bags", {
+	get_formspec = function(player, perplayer_formspec)
 		local player_name = player:get_player_name()
-		return { formspec = table.concat({
-			string.gsub(unified_inventory.standard_inv_bg, "YYY", "4.4"),
-			bags_inv_bg_prefix.."1.175;ui_bags_header.png]",
-			"label[0,0;" .. F(S("Bags")) .. "]",
-			"button[0,2.2;2,0.5;bag1;" .. F(S("Bag @1", 1)) .. "]",
-			"button[2,2.2;2,0.5;bag2;" .. F(S("Bag @1", 2)) .. "]",
-			"button[4,2.2;2,0.5;bag3;" .. F(S("Bag @1", 3)) .. "]",
-			"button[6,2.2;2,0.5;bag4;" .. F(S("Bag @1", 4)) .. "]",
+		local std_inv_x = perplayer_formspec.std_inv_x
+		local formspec = {
+			perplayer_formspec.standard_inv_bg,
+			"label[", perplayer_formspec.form_header_x, ",",
+				perplayer_formspec.form_header_y, ";", F(S("Bags")), "]",
 			"listcolors[#00000000;#00000000]",
-			"list[detached:" .. F(player_name) .. "_bags;bag1;0.5,1.1;1,1;]",
-			"list[detached:" .. F(player_name) .. "_bags;bag2;2.5,1.1;1,1;]",
-			"list[detached:" .. F(player_name) .. "_bags;bag3;4.5,1.1;1,1;]",
-			"list[detached:" .. F(player_name) .. "_bags;bag4;6.5,1.1;1,1;]"
-		}) }
+		}
+
+		for i = 1, 4 do
+			local x = std_inv_x + i * 2.5
+			formspec[#formspec + 1] = ui.single_slot(x - 1.875, 1.5)
+			formspec[#formspec + 1] = string.format("list[detached:%s_bags;bag%i;%.3f,1.65;1,1;]",
+				F(player_name), i, x - 1.725)
+			formspec[#formspec + 1] = string.format("button[%.4f,2.75;1.875,0.75;bag%i;%s]",
+				x - 2.1875, i, F(S("Bag @1", i)))
+		end
+
+		return { formspec = table.concat(formspec) }
 	end,
 })
 
-unified_inventory.register_button("bags", {
+ui.register_button("bags", {
 	type = "image",
 	image = "ui_bags_icon.png",
 	tooltip = S("Bags"),
-	hide_lite=true
 })
 
 local function get_player_bag_stack(player, i)
@@ -44,33 +47,46 @@ local function get_player_bag_stack(player, i)
 end
 
 for bag_i = 1, 4 do
-	unified_inventory.register_page("bag" .. bag_i, {
-		get_formspec = function(player)
+	ui.register_page("bag" .. bag_i, {
+		get_formspec = function(player, perplayer_formspec)
 			local stack = get_player_bag_stack(player, bag_i)
 			local image = stack:get_definition().inventory_image
-			local fs = {
-				string.gsub(unified_inventory.standard_inv_bg, "YYY", "4.4"),
-				"image[7,0;1,1;" .. image .. "]",
-				"label[0,0;" .. F(S("Bag @1", bag_i)) .. "]",
-				"listcolors[#00000000;#00000000]",
-				"list[current_player;bag" .. bag_i .. "contents;0,1.1;8,3;]",
-				"listring[current_name;bag" .. bag_i .. "contents]",
-				"listring[current_player;main]",
-			}
 			local slots = stack:get_definition().groups.bagslots
-			if slots == 8 then
-					fs[#fs + 1] = bags_inv_bg_prefix.."1.175;ui_bags_inv_small.png]"
-			elseif slots == 16 then
-					fs[#fs + 1] = bags_inv_bg_prefix.."2.35;ui_bags_inv_medium.png]"
-			elseif slots == 24 then
-					fs[#fs + 1] = bags_inv_bg_prefix.."3.525;ui_bags_inv_large.png]"
+			local std_inv_x = perplayer_formspec.std_inv_x
+			local lite_mode = perplayer_formspec.is_lite_mode
+
+			local bag_inv_y, header_x, header_y = 1.5, 0.3, 0.65
+			if lite_mode then
+				bag_inv_y = 0.5
+				header_x = perplayer_formspec.form_header_x
+				header_y = perplayer_formspec.form_header_y
 			end
+
+			local formspec = {
+				perplayer_formspec.standard_inv_bg,
+				ui.make_inv_img_grid(std_inv_x, bag_inv_y, 8, slots/8),
+				"label[", header_x, ",", header_y, ";", F(S("Bag @1", bag_i)), "]",
+				"listcolors[#00000000;#00000000]",
+				"listring[current_player;main]",
+				string.format("list[current_player;bag%icontents;%f,%f;8,3;]",
+				    bag_i, std_inv_x + ui.list_img_offset, bag_inv_y + ui.list_img_offset),
+				"listring[current_name;bag", bag_i, "contents]",
+			}
+
+			if lite_mode then
+				return { formspec = table.concat(formspec) }
+			end
+
+			local n = #formspec + 1
+			formspec[n] = "image[" .. std_inv_x + 8.9 .. ",0.4;1,1;" .. image .. "]"
+			n = n + 1
+
 			local player_name = player:get_player_name() -- For if statement.
-			if unified_inventory.trash_enabled
-					or unified_inventory.is_creative(player_name)
-					or minetest.get_player_privs(player_name).give then
-				fs[#fs + 1] = "image[5.91,-0.06;1.21,1.15;ui_bags_trash.png]"
-						.. "list[detached:trash;main;6,0.1;1,1;]"
+			if ui.trash_enabled
+				or ui.is_creative(player_name)
+				or minetest.get_player_privs(player_name).give then
+					formspec[n] = ui.make_trash_slot(7.8, 0.25)
+					n = n + 1
 			end
 			local inv = player:get_inventory()
 			for i = 1, 4 do
@@ -87,11 +103,12 @@ for bag_i = 1, 4 do
 					end
 					local img = def.inventory_image
 					local label = F(S("Bag @1", i)) .. "\n" .. used .. "/" .. size
-					fs[#fs + 1] = string.format("image_button[%i,0;1,1;%s;bag%i;%s]",
-							i + 1, img, i, label)
+					formspec[n] = string.format("image_button[%f,0.4;1,1;%s;bag%i;%s]",
+							(i + 1.35)*1.25, img, i, label)
+					n = n + 1
 				end
 			end
-			return { formspec = table.concat(fs) }
+			return { formspec = table.concat(formspec) }
 		end,
 	})
 end
@@ -106,12 +123,14 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 			if not stack:get_definition().groups.bagslots then
 				return
 			end
-			unified_inventory.set_inventory_formspec(player, "bag" .. i)
+			ui.set_inventory_formspec(player, "bag" .. i)
 			return
 		end
 	end
 end)
 
+-- Player slots are preserved when unified_inventory is disabled. Do not allow modification.
+-- Fix: use a detached inventory and store the data separately.
 local function save_bags_metadata(player, bags_inv)
 	local is_empty = true
 	local bags = {}
@@ -125,7 +144,7 @@ local function save_bags_metadata(player, bags_inv)
 	end
 	local meta = player:get_meta()
 	if is_empty then
-		meta:set_string("unified_inventory:bags", nil)
+		meta:set_string("unified_inventory:bags", "")
 	else
 		meta:set_string("unified_inventory:bags",
 			minetest.serialize(bags))
@@ -161,7 +180,7 @@ local function load_bags_metadata(player, bags_inv)
 		save_bags_metadata(player, bags_inv)
 	end
 
-	-- Clean up deprecated garbage after saving
+	-- Legacy: Clean up old player lists
 	for i = 1, 4 do
 		local bag = "bag" .. i
 		player_inv:set_size(bag, 0)
@@ -170,46 +189,29 @@ end
 
 minetest.register_on_joinplayer(function(player)
 	local player_name = player:get_player_name()
-	local bags_inv = minetest.create_detached_inventory(player_name .. "_bags",{
+	local bags_inv = minetest.create_detached_inventory(player_name .. "_bags", {
+		allow_put = function(inv, listname, index, stack, player)
+			local new_slots = stack:get_definition().groups.bagslots
+			if not new_slots then
+				return 0 -- ItemStack is not a bag.
+			end
+
+			-- The execution order of `allow_put`/`allow_take` is not defined.
+			-- We do not know the replacement ItemStack if the items are swapped.
+			-- Hence, bag slot upgrades and downgrades are not possible with the
+			-- current API.
+
+			if not player:get_inventory():is_empty(listname .. "contents") then
+				-- Legacy: in case `allow_take` is not executed on old Minetest versions.
+				return 0
+			end
+			return 1
+		end,
 		on_put = function(inv, listname, index, stack, player)
 			player:get_inventory():set_size(listname .. "contents",
 					stack:get_definition().groups.bagslots)
 			save_bags_metadata(player, inv)
 		end,
-		allow_put = function(inv, listname, index, stack, player)
-			local new_slots = stack:get_definition().groups.bagslots
-			if not new_slots then
-				return 0
-			end
-			local player_inv = player:get_inventory()
-			local old_slots = player_inv:get_size(listname .. "contents")
-
-			if new_slots >= old_slots then
-				return 1
-			end
-
-			-- using a smaller bag, make sure it fits
-			local old_list = player_inv:get_list(listname .. "contents")
-			local new_list = {}
-			local slots_used = 0
-			local use_new_list = false
-
-			for i, v in ipairs(old_list) do
-				if v and not v:is_empty() then
-					slots_used = slots_used + 1
-					use_new_list = i > new_slots
-					new_list[slots_used] = v
-				end
-			end
-			if new_slots >= slots_used then
-				if use_new_list then
-					player_inv:set_list(listname .. "contents", new_list)
-				end
-				return 1
-			end
-			-- New bag is smaller: Disallow inserting
-			return 0
-		end,
 		allow_take = function(inv, listname, index, stack, player)
 			if player:get_inventory():is_empty(listname .. "contents") then
 				return stack:get_count()
@@ -219,6 +221,11 @@ minetest.register_on_joinplayer(function(player)
 		on_take = function(inv, listname, index, stack, player)
 			player:get_inventory():set_size(listname .. "contents", 0)
 			save_bags_metadata(player, inv)
+			if listname == ui.current_page[player:get_player_name()] then
+				-- Bag is currently open: avoid follow-up issues by navigating back
+				-- Trick: the list name is the same as the registered page name
+				ui.set_inventory_formspec(player, "bags")
+			end
 		end,
 		allow_move = function()
 			return 0
@@ -228,6 +235,20 @@ minetest.register_on_joinplayer(function(player)
 	load_bags_metadata(player, bags_inv)
 end)
 
+
+minetest.register_allow_player_inventory_action(function(player, action, inventory, info)
+	-- From detached inventory -> player inventory: put & take callbacks
+	if action ~= "put" or not info.listname:find("bag%dcontents") then
+		return
+	end
+	if info.stack:get_definition().groups.bagslots then
+		-- Problem 1: empty bags could be moved into their own slots
+		-- Problem 2: cannot reliably keep track of ItemStack ownership due to
+		--> Disallow all external bag movements into this list
+		return 0
+	end
+end)
+
 -- register bag tools
 minetest.register_tool("unified_inventory:bag_small", {
 	description = S("Small Bag"),

callbacks.lua

@@ -1,3 +1,5 @@
+local ui = unified_inventory
+
 local function default_refill(stack)
 	stack:set_count(stack:get_stack_max())
 	local itemdef = minetest.registered_items[stack:get_name()]
@@ -12,18 +14,17 @@ end
 minetest.register_on_joinplayer(function(player)
 	local player_name = player:get_player_name()
 	unified_inventory.players[player_name] = {}
-	unified_inventory.current_index[player_name] = 1
+	unified_inventory.current_index[player_name] = 1 -- Item (~page) index
 	unified_inventory.filtered_items_list[player_name] =
-	unified_inventory.items_list
+		unified_inventory.items_list
 	unified_inventory.activefilter[player_name] = ""
 	unified_inventory.active_search_direction[player_name] = "nochange"
-	unified_inventory.apply_filter(player, "", "nochange")
 	unified_inventory.current_searchbox[player_name] = ""
+	unified_inventory.current_category[player_name] = "all"
+	unified_inventory.current_category_scroll[player_name] = 0
 	unified_inventory.alternate[player_name] = 1
 	unified_inventory.current_item[player_name] = nil
 	unified_inventory.current_craft_direction[player_name] = "recipe"
-	unified_inventory.set_inventory_formspec(player,
-	unified_inventory.default)
 
 	-- Refill slot
 	local refill = minetest.create_detached_inventory(player_name.."refill", {
@@ -45,34 +46,92 @@ minetest.register_on_joinplayer(function(player)
 	refill:set_size("main", 1)
 end)
 
+minetest.register_on_mods_loaded(function()
+       minetest.register_on_joinplayer(function(player)
+               -- After everything is initialized, set up the formspec
+               ui.apply_filter(player, "", "nochange")
+               ui.set_inventory_formspec(player, unified_inventory.default)
+       end)
+end)
+
 local function apply_new_filter(player, search_text, new_dir)
 	local player_name = player:get_player_name()
-	minetest.sound_play("click", {to_player=player_name, gain = 0.1})
-	unified_inventory.apply_filter(player, search_text, new_dir)
-	unified_inventory.current_searchbox[player_name] = search_text
-	unified_inventory.set_inventory_formspec(player,
-			unified_inventory.current_page[player_name])
+
+	minetest.sound_play("ui_click", {to_player=player_name, gain = 0.1})
+	ui.apply_filter(player, search_text, new_dir)
+	ui.current_searchbox[player_name] = search_text
+	ui.set_inventory_formspec(player, ui.current_page[player_name])
+end
+
+-- Search box handling
+local function receive_fields_searchbox(player, formname, fields)
+	local player_name = player:get_player_name()
+
+	-- always take new search text, even if not searching on it yet
+	if fields.searchbox and fields.searchbox ~= ui.current_searchbox[player_name] then
+		ui.current_searchbox[player_name] = fields.searchbox
+	end
+
+	if fields.searchbutton
+			or fields.key_enter_field == "searchbox" then
+
+		if ui.current_searchbox[player_name] ~= ui.activefilter[player_name] then
+			ui.apply_filter(player, ui.current_searchbox[player_name], "nochange")
+			ui.set_inventory_formspec(player, ui.current_page[player_name])
+			minetest.sound_play("paperflip2",
+					{to_player=player_name, gain = 1.0})
+		end
+	elseif fields.searchresetbutton then
+		if ui.activefilter[player_name] ~= "" then
+			apply_new_filter(player, "", "nochange")
+		end
+	end
 end
 
 minetest.register_on_player_receive_fields(function(player, formname, fields)
-	local player_name = player:get_player_name()
-
-	local ui_peruser,draw_lite_mode = unified_inventory.get_per_player_formspec(player_name)
-
 	if formname ~= "" then
 		return
 	end
 
-	-- always take new search text, even if not searching on it yet
-	if fields.searchbox
-	and fields.searchbox ~= unified_inventory.current_searchbox[player_name] then
-		unified_inventory.current_searchbox[player_name] = fields.searchbox
+	receive_fields_searchbox(player, formname, fields)
+
+	local player_name = player:get_player_name()
+
+	local ui_peruser,draw_lite_mode = unified_inventory.get_per_player_formspec(player_name)
+
+	local clicked_category
+	for name, value in pairs(fields) do
+		local category_name = string.match(name, "^category_(.+)$")
+		if category_name then
+			clicked_category = category_name
+			break
+		end
+	end
+
+	if clicked_category
+	and clicked_category ~= unified_inventory.current_category[player_name] then
+		unified_inventory.current_category[player_name] = clicked_category
+		unified_inventory.apply_filter(player, unified_inventory.current_searchbox[player_name], "nochange")
+		unified_inventory.set_inventory_formspec(player,
+				unified_inventory.current_page[player_name])
+	end
+
+	if fields.next_category or fields.prev_category then
+		local step = fields.next_category and 1 or -1
+		local scroll_old = ui.current_category_scroll[player_name]
+		local scroll_new = math.max(0, math.min(#ui.category_list - ui_peruser.pagecols, scroll_old + step))
+
+		if scroll_old ~= scroll_new then
+			ui.current_category_scroll[player_name] = scroll_new
+			ui.set_inventory_formspec(player,
+					unified_inventory.current_page[player_name])
+		end
 	end
 
 	for i, def in pairs(unified_inventory.buttons) do
 		if fields[def.name] then
 			def.action(player)
-			minetest.sound_play("click",
+			minetest.sound_play("ui_click",
 					{to_player=player_name, gain = 0.1})
 			return
 		end
@@ -121,11 +180,12 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	-- Check clicked item image button
 	local clicked_item
 	for name, value in pairs(fields) do
-		local new_dir, mangled_item = string.match(name, "^item_button_([a-z]+)_(.*)$")
+		local new_dir, mangled_item = string.match(name, "^[0-9]*_?item_button_([a-z]+)_(.*)$")
 		if new_dir and mangled_item then
 			clicked_item = unified_inventory.demangle_for_formspec(mangled_item)
 			if string.sub(clicked_item, 1, 6) == "group:" then
 				-- Change search filter to this group
+				unified_inventory.current_category[player_name] = "all"
 				apply_new_filter(player, clicked_item, new_dir)
 				return
 			end
@@ -136,7 +196,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 		end
 	end
 	if clicked_item then
-		minetest.sound_play("click",
+		minetest.sound_play("ui_click",
 				{to_player=player_name, gain = 0.1})
 		local page = unified_inventory.current_page[player_name]
 		local player_creative = unified_inventory.is_creative(player_name)
@@ -158,22 +218,11 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 		end
 	end
 
-	if fields.searchbutton
-			or fields.key_enter_field == "searchbox" then
-		unified_inventory.apply_filter(player, unified_inventory.current_searchbox[player_name], "nochange")
-		unified_inventory.set_inventory_formspec(player,
-				unified_inventory.current_page[player_name])
-		minetest.sound_play("paperflip2",
-				{to_player=player_name, gain = 1.0})
-	elseif fields.searchresetbutton then
-		apply_new_filter(player, "", "nochange")
-	end
-
 	-- alternate buttons
 	if not (fields.alternate or fields.alternate_prev) then
 		return
 	end
-	minetest.sound_play("click",
+	minetest.sound_play("ui_click",
 			{to_player=player_name, gain = 0.1})
 	local item_name = unified_inventory.current_item[player_name]
 	if not item_name then
@@ -204,11 +253,8 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 			unified_inventory.current_page[player_name])
 end)
 
-if minetest.delete_detached_inventory then
-	minetest.register_on_leaveplayer(function(player)
-		local player_name = player:get_player_name()
-		minetest.delete_detached_inventory(player_name.."_bags")
-		minetest.delete_detached_inventory(player_name.."craftrecipe")
-		minetest.delete_detached_inventory(player_name.."refill")
-	end)
-end
+minetest.register_on_leaveplayer(function(player)
+	local player_name = player:get_player_name()
+	minetest.remove_detached_inventory(player_name.."_bags")
+	minetest.remove_detached_inventory(player_name.."refill")
+end)

category.lua

@@ -0,0 +1,158 @@
+local S = minetest.get_translator("unified_inventory")
+
+unified_inventory.registered_categories = {}
+unified_inventory.registered_category_items = {}
+unified_inventory.category_list = {}
+
+local function char_to_sort_index(char_code)
+	if char_code <= 32 then
+		-- Command codes, no thanks
+		return 0
+	end
+	if char_code <= 64 then
+		-- Sorts numbers, and some punctuation, after letters
+		return char_code
+	end
+	if char_code >= 158 then
+		-- Out of sortable range
+		return 0
+	end
+	if char_code > 122 then
+		-- Avoids overlap with {, |, } and ~
+		return char_code - 58
+	end
+	if char_code > 96 then
+		-- Normalises lowercase with uppercase
+		return char_code - 96
+	end
+	return char_code - 64
+end
+
+local function string_to_sort_index(str)
+	local max_chars = 5
+	local power = 100
+	local index = 0
+	for i=1,math.min(#str, max_chars) do
+		index = index + (char_to_sort_index(string.byte(str, i))/(power^i))
+	end
+	return index
+end
+
+function update_category_list()
+	local category_list = {}
+	table.insert(category_list, {
+		name = "all",
+		label = S("All Items"),
+		symbol = "ui_category_all.png",
+		index = -2,
+	})
+	table.insert(category_list, {
+		name = "uncategorized",
+		label = S("Misc. Items"),
+		symbol = "ui_category_none.png",
+		index = -1,
+	})
+	for category, def in pairs(unified_inventory.registered_categories) do
+		table.insert(category_list, {
+			name = category,
+			label = def.label or category,
+			symbol = def.symbol,
+			index = def.index or                    -- sortby defined order
+					string_to_sort_index(category)  -- or do a rudimentary alphabetical sort
+		})
+	end
+	table.sort(category_list, function (a,b)
+		return a.index < b.index
+	end)
+	unified_inventory.category_list = category_list
+end
+
+local function ensure_category_exists(category_name)
+	if not unified_inventory.registered_categories[category_name] then
+		unified_inventory.registered_categories[category_name] = {
+			symbol = "unknown_item.png",
+			label = category_name
+		}
+	end
+	if not unified_inventory.registered_category_items[category_name] then
+		unified_inventory.registered_category_items[category_name] = {}
+	end
+end
+
+function unified_inventory.register_category(category_name, config)
+	ensure_category_exists(category_name)
+	config = config or {}
+	if config.symbol then
+		unified_inventory.set_category_symbol(category_name, config.symbol)
+	end
+	if config.label then
+		unified_inventory.set_category_label(category_name, config.label)
+	end
+	if config.index then
+		unified_inventory.set_category_index(category_name, config.index)
+	end
+	if config.items then
+		unified_inventory.add_category_items(category_name, config.items)
+	end
+	update_category_list()
+end
+
+-- TODO: Mark these for removal. They are pretty much useless
+
+function unified_inventory.set_category_symbol(category_name, symbol)
+	ensure_category_exists(category_name)
+	unified_inventory.registered_categories[category_name].symbol = symbol
+	update_category_list()
+end
+function unified_inventory.set_category_label(category_name, label)
+	ensure_category_exists(category_name)
+	unified_inventory.registered_categories[category_name].label = label
+	update_category_list()
+end
+function unified_inventory.set_category_index(category_name, index)
+	ensure_category_exists(category_name)
+	unified_inventory.registered_categories[category_name].index = index
+	update_category_list()
+end
+function unified_inventory.add_category_item(category_name, item)
+	if type(item) ~= "string" then
+		minetest.log("warning", "[unified_inventory] Cannot register category item: " .. dump(item))
+		return
+	end
+
+	ensure_category_exists(category_name)
+	unified_inventory.registered_category_items[category_name][item] = true
+end
+function unified_inventory.add_category_items(category_name, items)
+	for _,item in ipairs(items) do
+		unified_inventory.add_category_item(category_name, item)
+	end
+end
+
+function unified_inventory.remove_category_item(category_name, item)
+	unified_inventory.registered_category_items[category_name][item] = nil
+end
+function unified_inventory.remove_category(category_name)
+	unified_inventory.registered_categories[category_name] = nil
+	unified_inventory.registered_category_items[category_name] = nil
+	update_category_list()
+end
+
+function unified_inventory.find_category(item)
+	-- Returns the first category the item exists in
+	-- Best for checking if an item has any category at all
+	for category, items in pairs(unified_inventory.registered_category_items) do
+		if items[item] then return category end
+	end
+end
+function unified_inventory.find_categories(item)
+	-- Returns all the categories the item exists in
+	-- Best for listing all categories
+	local categories = {}
+	for category, items in pairs(unified_inventory.registered_category_items) do
+		if items[item] then
+			table.insert(categories, category)
+		end
+	end
+	return categories
+end

default-categories.lua

@@ -0,0 +1,704 @@
+local S = minetest.get_translator("unified_inventory")
+local ui = unified_inventory
+
+unified_inventory.register_category('plants', {
+	symbol = "flowers:tulip",
+	label = S("Plant Life")
+})
+unified_inventory.register_category('building', {
+	symbol = "default:brick",
+	label = S("Building Materials")
+})
+unified_inventory.register_category('tools', {
+	symbol = "default:pick_diamond",
+	label = S("Tools")
+})
+unified_inventory.register_category('minerals', {
+	symbol = "default:iron_lump",
+	label = S("Minerals and Metals")
+})
+unified_inventory.register_category('environment', {
+	symbol = "default:dirt_with_grass",
+	label = S("Environment and Worldgen")
+})
+unified_inventory.register_category('lighting', {
+	symbol = "default:torch",
+	label = S("Lighting")
+})
+
+local function register_automatic_categorization()
+	-- Add biome nodes to environment category
+	for _,def in pairs(minetest.registered_biomes) do
+		local env_nodes = {
+			def.node_riverbed, def.node_top, def.node_filler, def.node_dust,
+		}
+		for i,node in pairs(env_nodes) do
+			if node then
+				unified_inventory.add_category_item('environment', node)
+			end
+		end
+	end
+
+	-- Preparation for ore registration: find all possible drops (digging)
+	local possible_node_dig_drops = {
+		-- ["default:stone_with_coal"] = { "default:coal_lump", "mymod:raregem" }
+		-- Ores may be contained multiple times, depending on drop chances.
+	}
+	for itemname, recipes in pairs(ui.crafts_for.usage) do
+		for _, recipe in ipairs(recipes) do
+			if recipe.type == "digging" or recipe.type == "digging_chance" then
+				if not possible_node_dig_drops[itemname] then
+					possible_node_dig_drops[itemname] = {}
+				end
+				local stack = ItemStack(recipe.output)
+				table.insert(possible_node_dig_drops[itemname], stack:get_name())
+			end
+		end
+	end
+
+	-- Add minable ores to minerals and everything else (pockets of stone & sand variations) to environment
+	for _, odef in pairs(minetest.registered_ores) do
+		local drops = possible_node_dig_drops[odef.ore]
+		if drops and odef.ore_type == "scatter" then
+			ui.add_category_item('minerals', odef.ore)
+			-- Register all possible drops as "minerals"
+			ui.add_category_items('minerals', drops)
+			possible_node_dig_drops[odef.ore] = {} -- mask as handled
+		else
+			ui.add_category_item('environment', odef.ore)
+		end
+	end
+
+	-- Add items by item definition
+	for name, def in pairs(minetest.registered_items) do
+		local group = def.groups or {}
+		if not group.not_in_creative_inventory then
+			if group.stair or
+			   group.slab or
+			   group.wall or
+			   group.fence then
+				unified_inventory.add_category_item('building', name)
+			elseif group.flora or
+				   group.flower or
+				   group.seed or
+				   group.leaves or
+				   group.sapling or
+				   group.tree then
+				unified_inventory.add_category_item('plants', name)
+			elseif def.type == 'tool' then
+				unified_inventory.add_category_item('tools', name)
+			elseif def.liquidtype == 'source' then
+				unified_inventory.add_category_item('environment', name)
+			elseif def.light_source and def.light_source > 0 then
+				unified_inventory.add_category_item('lighting', name)
+			elseif group.door or
+				   minetest.global_exists("doors") and (
+					 doors.registered_doors and doors.registered_doors[name..'_a'] or
+					 doors.registered_trapdoors and doors.registered_trapdoors[name]
+				   ) then
+				unified_inventory.add_category_item('building', name)
+			end
+		end
+	end
+end
+
+if ui.automatic_categorization then
+	ui.register_on_initialized(register_automatic_categorization)
+end
+
+
+-- [[
+unified_inventory.add_category_items('plants', {
+	"default:dry_grass_5",
+	"default:acacia_sapling",
+	"default:blueberry_bush_sapling",
+	"default:grass_2",
+	"default:pine_bush_stem",
+	"default:leaves",
+	"default:pine_needles",
+	"default:cactus",
+	"default:junglegrass",
+	"default:pine_sapling",
+	"default:sapling",
+	"default:bush_stem",
+	"default:dry_grass_2",
+	"default:fern_1",
+	"default:grass_3",
+	"default:marram_grass_1",
+	"default:pine_tree",
+	"default:dry_grass_3",
+	"default:dry_shrub",
+	"default:grass_4",
+	"default:marram_grass_2",
+	"default:jungleleaves",
+	"default:apple",
+	"default:tree",
+	"default:aspen_tree",
+	"default:bush_sapling",
+	"default:grass_5",
+	"default:blueberry_bush_leaves_with_berries",
+	"default:acacia_bush_sapling",
+	"default:grass_1",
+	"default:aspen_leaves",
+	"default:marram_grass_3",
+	"default:large_cactus_seedling",
+	"default:junglesapling",
+	"default:dry_grass_4",
+	"default:acacia_bush_stem",
+	"default:papyrus",
+	"default:pine_bush_needles",
+	"default:bush_leaves",
+	"default:fern_3",
+	"default:aspen_sapling",
+	"default:acacia_tree",
+	"default:apple_mark",
+	"default:acacia_leaves",
+	"default:jungletree",
+	"default:dry_grass_1",
+	"default:acacia_bush_leaves",
+	"default:emergent_jungle_sapling",
+	"default:fern_2",
+	"default:blueberries",
+	"default:sand_with_kelp",
+	"default:blueberry_bush_leaves",
+	"default:pine_bush_sapling",
+
+	"farming:cotton",
+	"farming:cotton_1",
+	"farming:cotton_2",
+	"farming:cotton_3",
+	"farming:cotton_4",
+	"farming:cotton_5",
+	"farming:cotton_6",
+	"farming:cotton_7",
+	"farming:cotton_8",
+	"farming:cotton_wild",
+	"farming:seed_cotton",
+	"farming:seed_wheat",
+	"farming:straw",
+	"farming:wheat",
+	"farming:wheat_1",
+	"farming:wheat_2",
+	"farming:wheat_3",
+	"farming:wheat_4",
+	"farming:wheat_5",
+	"farming:wheat_6",
+	"farming:wheat_7",
+	"farming:wheat_8",
+
+	"flowers:chrysanthemum_green",
+	"flowers:dandelion_white",
+	"flowers:dandelion_yellow",
+	"flowers:geranium",
+	"flowers:mushroom_brown",
+	"flowers:mushroom_red",
+	"flowers:rose",
+	"flowers:tulip",
+	"flowers:tulip_black",
+	"flowers:viola",
+	"flowers:waterlily",
+	"flowers:waterlily_waving",
+})
+
+unified_inventory.add_category_items('tools', {
+	"default:sword_diamond",
+	"default:axe_diamond",
+	"default:shovel_diamond",
+	"default:axe_steel",
+	"default:shovel_mese",
+	"default:sword_wood",
+	"default:pick_bronze",
+	"default:axe_stone",
+	"default:sword_stone",
+	"default:pick_stone",
+	"default:shovel_stone",
+	"default:sword_mese",
+	"default:shovel_bronze",
+	"default:sword_bronze",
+	"default:axe_bronze",
+	"default:shovel_steel",
+	"default:sword_steel",
+	"default:axe_mese",
+	"default:shovel_wood",
+	"default:pick_mese",
+	"default:axe_wood",
+	"default:pick_diamond",
+	"default:pick_wood",
+	"default:pick_steel",
+
+	"farming:hoe_bronze",
+	"farming:hoe_diamond",
+	"farming:hoe_mese",
+	"farming:hoe_steel",
+	"farming:hoe_stone",
+	"farming:hoe_wood",
+
+	"fire:flint_and_steel",
+	"map:mapping_kit",
+	"screwdriver:screwdriver",
+
+	"fireflies:bug_net",
+	"bucket:bucket_empty",
+
+	"binoculars:binoculars",
+	"default:skeleton_key",
+})
+
+unified_inventory.add_category_items('minerals', {
+	"default:stone_with_copper",
+	"default:stone_with_gold",
+	"default:stone_with_iron",
+	"default:copper_ingot",
+	"default:copper_lump",
+	"default:gold_lump",
+	"default:diamondblock",
+	"default:stone_with_diamond",
+	"default:stone_with_mese",
+	"default:steel_ingot",
+	"default:gold_ingot",
+	"default:iron_lump",
+	"default:tinblock",
+	"default:tin_lump",
+	"default:stone_with_tin",
+	"default:mese_crystal",
+	"default:diamond",
+	"default:bronze_ingot",
+	"default:mese",
+	"default:mese_crystal_fragment",
+	"default:copperblock",
+	"default:stone_with_coal",
+	"default:steelblock",
+	"default:tin_ingot",
+	"default:coalblock",
+	"default:coal_lump",
+	"default:bronzeblock",
+	"default:goldblock",
+})
+
+unified_inventory.add_category_items('building', {
+	"default:fence_rail_aspen_wood",
+	"default:fence_rail_acacia_wood",
+	"default:fence_junglewood",
+	"default:fence_rail_junglewood",
+	"default:fence_aspen_wood",
+	"default:fence_pine_wood",
+	"default:fence_rail_wood",
+	"default:fence_rail_pine_wood",
+	"default:fence_acacia_wood",
+	"default:junglewood",
+	"default:acacia_wood",
+	"default:aspen_wood",
+	"default:fence_wood",
+	"default:pine_wood",
+	"default:silver_sandstone",
+	"default:desert_sandstone",
+	"default:sandstone_block",
+	"default:desert_sandstone_brick",
+	"default:stone_block",
+	"default:stonebrick",
+	"default:obsidian_glass",
+	"default:desert_sandstone_block",
+	"default:silver_sandstone_brick",
+	"default:brick",
+	"default:obsidianbrick",
+	"default:sandstonebrick",
+	"default:sandstone",
+	"default:desert_stone_block",
+	"default:silver_sandstone_block",
+	"default:wood",
+	"default:obsidian_block",
+	"default:glass",
+	"default:clay_brick",
+	"default:desert_stonebrick",
+	"default:desert_cobble",
+	"default:cobble",
+	"default:mossycobble",
+
+	"doors:door_glass",
+	"doors:door_glass_a",
+	"doors:door_glass_b",
+	"doors:door_glass_c",
+	"doors:door_glass_d",
+	"doors:door_obsidian_glass",
+	"doors:door_obsidian_glass_a",
+	"doors:door_obsidian_glass_b",
+	"doors:door_obsidian_glass_c",
+	"doors:door_obsidian_glass_d",
+	"doors:door_steel",
+	"doors:door_steel_a",
+	"doors:door_steel_b",
+	"doors:door_steel_c",
+	"doors:door_steel_d",
+	"doors:door_wood",
+	"doors:door_wood_a",
+	"doors:door_wood_b",
+	"doors:door_wood_c",
+	"doors:door_wood_d",
+	"doors:gate_acacia_wood_closed",
+	"doors:gate_acacia_wood_open",
+	"doors:gate_aspen_wood_closed",
+	"doors:gate_aspen_wood_open",
+	"doors:gate_junglewood_closed",
+	"doors:gate_junglewood_open",
+	"doors:gate_pine_wood_closed",
+	"doors:gate_pine_wood_open",
+	"doors:gate_wood_closed",
+	"doors:gate_wood_open",
+	"doors:hidden",
+	"doors:trapdoor",
+	"doors:trapdoor_open",
+	"doors:trapdoor_steel",
+	"doors:trapdoor_steel_open",
+
+	"stairs:slab_bronzeblock",
+	"stairs:slab_copperblock",
+	"stairs:slab_steelblock",
+	"stairs:slab_tinblock",
+	"stairs:stair_bronzeblock",
+	"stairs:stair_copperblock",
+	"stairs:stair_inner_bronzeblock",
+	"stairs:stair_inner_copperblock",
+	"stairs:stair_inner_steelblock",
+	"stairs:stair_inner_tinblock",
+	"stairs:stair_outer_bronzeblock",
+	"stairs:stair_outer_copperblock",
+	"stairs:stair_outer_steelblock",
+	"stairs:stair_outer_tinblock",
+	"stairs:stair_steelblock",
+	"stairs:stair_tinblock",
+
+	"stairs:slab_acacia_wood",
+	"stairs:slab_aspen_wood",
+	"stairs:slab_brick",
+	"stairs:slab_cobble",
+	"stairs:slab_desert_cobble",
+	"stairs:slab_desert_sandstone",
+	"stairs:slab_desert_sandstone_block",
+	"stairs:slab_desert_sandstone_brick",
+	"stairs:slab_desert_stone",
+	"stairs:slab_desert_stone_block",
+	"stairs:slab_desert_stonebrick",
+	"stairs:slab_glass",
+	"stairs:slab_goldblock",
+	"stairs:slab_ice",
+	"stairs:slab_junglewood",
+	"stairs:slab_mossycobble",
+	"stairs:slab_obsidian",
+	"stairs:slab_obsidian_block",
+	"stairs:slab_obsidian_glass",
+	"stairs:slab_obsidianbrick",
+	"stairs:slab_pine_wood",
+	"stairs:slab_sandstone",
+	"stairs:slab_sandstone_block",
+	"stairs:slab_sandstonebrick",
+	"stairs:slab_silver_sandstone",
+	"stairs:slab_silver_sandstone_block",
+	"stairs:slab_silver_sandstone_brick",
+	"stairs:slab_snowblock",
+	"stairs:slab_stone",
+	"stairs:slab_stone_block",
+	"stairs:slab_stonebrick",
+	"stairs:slab_straw",
+	"stairs:slab_wood",
+	"stairs:stair_acacia_wood",
+	"stairs:stair_aspen_wood",
+	"stairs:stair_brick",
+	"stairs:stair_cobble",
+	"stairs:stair_desert_cobble",
+	"stairs:stair_desert_sandstone",
+	"stairs:stair_desert_sandstone_block",
+	"stairs:stair_desert_sandstone_brick",
+	"stairs:stair_desert_stone",
+	"stairs:stair_desert_stone_block",
+	"stairs:stair_desert_stonebrick",
+	"stairs:stair_glass",
+	"stairs:stair_goldblock",
+	"stairs:stair_ice",
+	"stairs:stair_inner_acacia_wood",
+	"stairs:stair_inner_aspen_wood",
+	"stairs:stair_inner_brick",
+	"stairs:stair_inner_cobble",
+	"stairs:stair_inner_desert_cobble",
+	"stairs:stair_inner_desert_sandstone",
+	"stairs:stair_inner_desert_sandstone_block",
+	"stairs:stair_inner_desert_sandstone_brick",
+	"stairs:stair_inner_desert_stone",
+	"stairs:stair_inner_desert_stone_block",
+	"stairs:stair_inner_desert_stonebrick",
+	"stairs:stair_inner_glass",
+	"stairs:stair_inner_goldblock",
+	"stairs:stair_inner_ice",
+	"stairs:stair_inner_junglewood",
+	"stairs:stair_inner_mossycobble",
+	"stairs:stair_inner_obsidian",
+	"stairs:stair_inner_obsidian_block",
+	"stairs:stair_inner_obsidian_glass",
+	"stairs:stair_inner_obsidianbrick",
+	"stairs:stair_inner_pine_wood",
+	"stairs:stair_inner_sandstone",
+	"stairs:stair_inner_sandstone_block",
+	"stairs:stair_inner_sandstonebrick",
+	"stairs:stair_inner_silver_sandstone",
+	"stairs:stair_inner_silver_sandstone_block",
+	"stairs:stair_inner_silver_sandstone_brick",
+	"stairs:stair_inner_snowblock",
+	"stairs:stair_inner_stone",
+	"stairs:stair_inner_stone_block",
+	"stairs:stair_inner_stonebrick",
+	"stairs:stair_inner_straw",
+	"stairs:stair_inner_wood",
+	"stairs:stair_junglewood",
+	"stairs:stair_mossycobble",
+	"stairs:stair_obsidian",
+	"stairs:stair_obsidian_block",
+	"stairs:stair_obsidian_glass",
+	"stairs:stair_obsidianbrick",
+	"stairs:stair_outer_acacia_wood",
+	"stairs:stair_outer_aspen_wood",
+	"stairs:stair_outer_brick",
+	"stairs:stair_outer_cobble",
+	"stairs:stair_outer_desert_cobble",
+	"stairs:stair_outer_desert_sandstone",
+	"stairs:stair_outer_desert_sandstone_block",
+	"stairs:stair_outer_desert_sandstone_brick",
+	"stairs:stair_outer_desert_stone",
+	"stairs:stair_outer_desert_stone_block",
+	"stairs:stair_outer_desert_stonebrick",
+	"stairs:stair_outer_glass",
+	"stairs:stair_outer_goldblock",
+	"stairs:stair_outer_ice",
+	"stairs:stair_outer_junglewood",
+	"stairs:stair_outer_mossycobble",
+	"stairs:stair_outer_obsidian",
+	"stairs:stair_outer_obsidian_block",
+	"stairs:stair_outer_obsidian_glass",
+	"stairs:stair_outer_obsidianbrick",
+	"stairs:stair_outer_pine_wood",
+	"stairs:stair_outer_sandstone",
+	"stairs:stair_outer_sandstone_block",
+	"stairs:stair_outer_sandstonebrick",
+	"stairs:stair_outer_silver_sandstone",
+	"stairs:stair_outer_silver_sandstone_block",
+	"stairs:stair_outer_silver_sandstone_brick",
+	"stairs:stair_outer_snowblock",
+	"stairs:stair_outer_stone",
+	"stairs:stair_outer_stone_block",
+	"stairs:stair_outer_stonebrick",
+	"stairs:stair_outer_straw",
+	"stairs:stair_outer_wood",
+	"stairs:stair_pine_wood",
+	"stairs:stair_sandstone",
+	"stairs:stair_sandstone_block",
+	"stairs:stair_sandstonebrick",
+	"stairs:stair_silver_sandstone",
+	"stairs:stair_silver_sandstone_block",
+	"stairs:stair_silver_sandstone_brick",
+	"stairs:stair_snowblock",
+	"stairs:stair_stone",
+	"stairs:stair_stone_block",
+	"stairs:stair_stonebrick",
+	"stairs:stair_straw",
+	"stairs:stair_wood",
+
+	"xpanes:bar",
+	"xpanes:bar_flat",
+	"xpanes:door_steel_bar",
+	"xpanes:door_steel_bar_a",
+	"xpanes:door_steel_bar_b",
+	"xpanes:door_steel_bar_c",
+	"xpanes:door_steel_bar_d",
+	"xpanes:obsidian_pane",
+	"xpanes:obsidian_pane_flat",
+	"xpanes:pane",
+	"xpanes:pane_flat",
+	"xpanes:trapdoor_steel_bar",
+	"xpanes:trapdoor_steel_bar_open",
+
+	"walls:cobble",
+	"walls:desertcobble",
+	"walls:mossycobble",
+})
+
+unified_inventory.add_category_items('environment', {
+	"air",
+	"default:cave_ice",
+	"default:dirt_with_rainforest_litter",
+	"default:gravel",
+	"default:dry_dirt_with_dry_grass",
+	"default:permafrost",
+	"default:desert_stone",
+	"default:ice",
+	"default:dry_dirt",
+	"default:obsidian",
+	"default:sand",
+	"default:river_water_source",
+	"default:dirt_with_snow",
+	"default:dirt_with_grass",
+	"default:water_flowing",
+	"default:dirt",
+	"default:desert_sand",
+	"default:permafrost_with_moss",
+	"default:dirt_with_coniferous_litter",
+	"default:water_source",
+	"default:dirt_with_dry_grass",
+	"default:river_water_flowing",
+	"default:stone",
+	"default:snow",
+	"default:lava_flowing",
+	"default:lava_source",
+	"default:permafrost_with_stones",
+	"default:dirt_with_grass_footsteps",
+	"default:silver_sand",
+	"default:snowblock",
+	"default:clay",
+
+	"farming:desert_sand_soil",
+	"farming:desert_sand_soil_wet",
+	"farming:dry_soil",
+	"farming:dry_soil_wet",
+	"farming:soil",
+	"farming:soil_wet",
+})
+
+unified_inventory.add_category_items('lighting', {
+	"default:mese_post_light_junglewood",
+	"default:torch_ceiling",
+	"default:meselamp",
+	"default:torch",
+	"default:mese_post_light_acacia_wood",
+	"default:mese_post_light",
+	"default:torch_wall",
+	"default:mese_post_light_pine_wood",
+	"default:mese_post_light_aspen_wood"
+})
+--]]
+
+
+--[[ UNCATEGORISED
+
+	"farming:string",
+
+	"beds:bed_bottom",
+	"beds:bed_top",
+	"beds:fancy_bed_bottom",
+	"beds:fancy_bed_top",
+	"boats:boat",
+	"bones:bones",
+
+	"bucket:bucket_lava",
+	"bucket:bucket_river_water",
+	"bucket:bucket_water",
+
+	"butterflies:butterfly_red",
+	"butterflies:butterfly_violet",
+	"butterflies:butterfly_white",
+	"butterflies:hidden_butterfly_red",
+	"butterflies:hidden_butterfly_violet",
+	"butterflies:hidden_butterfly_white",
+
+	"carts:brakerail",
+	"carts:cart",
+	"carts:powerrail",
+	"carts:rail",
+
+	"default:book",
+	"default:book_written",
+	"default:bookshelf",
+	"default:chest",
+	"default:chest_locked",
+	"default:chest_locked_open",
+	"default:chest_open",
+	"default:clay_lump",
+	"default:cloud",
+	"default:coral_brown",
+	"default:coral_cyan",
+	"default:coral_green",
+	"default:coral_orange",
+	"default:coral_pink",
+	"default:coral_skeleton",
+	"default:flint",
+	"default:furnace",
+	"default:furnace_active",
+	"default:key",
+	"default:ladder_steel",
+	"default:ladder_wood",
+	"default:obsidian_shard",
+	"default:paper",
+	"default:sign_wall_steel",
+	"default:sign_wall_wood",
+	"default:stick",
+
+	"fire:basic_flame",
+	"fire:permanent_flame",
+	"fireflies:firefly",
+	"fireflies:firefly_bottle",
+	"fireflies:hidden_firefly",
+
+	"ignore",
+	"unknown",
+
+	"tnt:boom",
+	"tnt:gunpowder",
+	"tnt:gunpowder_burning",
+	"tnt:tnt",
+	"tnt:tnt_burning",
+	"tnt:tnt_stick",
+
+	"vessels:drinking_glass",
+	"vessels:glass_bottle",
+	"vessels:glass_fragments",
+	"vessels:shelf",
+	"vessels:steel_bottle",
+
+	"dye:black",
+	"dye:blue",
+	"dye:brown",
+	"dye:cyan",
+	"dye:dark_green",
+	"dye:dark_grey",
+	"dye:green",
+	"dye:grey",
+	"dye:magenta",
+	"dye:orange",
+	"dye:pink",
+	"dye:red",
+	"dye:violet",
+	"dye:white",
+	"dye:yellow",
+
+	"wool:black",
+	"wool:blue",
+	"wool:brown",
+	"wool:cyan",
+	"wool:dark_green",
+	"wool:dark_grey",
+	"wool:green",
+	"wool:grey",
+	"wool:magenta",
+	"wool:orange",
+	"wool:pink",
+	"wool:red",
+	"wool:violet",
+	"wool:white",
+	"wool:yellow",
+
+	"unified_inventory:bag_large",
+	"unified_inventory:bag_medium",
+	"unified_inventory:bag_small",
+--]]
+
+--[[ LIST UNCATEGORIZED AFTER LOAD
+minetest.register_on_mods_loaded(function()
+	minetest.after(1, function ( )
+		local l = {}
+		for name,_ in pairs(minetest.registered_items) do
+			if not unified_inventory.find_category(name) then
+				-- minetest.log("error", minetest.serialize(minetest.registered_items[name]))
+				table.insert(l, name)
+			end
+		end
+		table.sort(l)
+		minetest.log(table.concat(l, '",'.."\n"..'"'))
+	end)
+end)
+--]]

doc/mod_api.txt

@@ -1,8 +1,17 @@
 unified_inventory API
 =====================
 
-This file provides information about the API of unified_inventory.
+This file provides information about the API of unified_inventory
+and can be viewed in Markdown readers.
 
+API revisions within unified_inventory can be checked using:
+
+	(unified_inventory.version or 1)
+
+**Revision history**
+
+* Version `1`: Classic formspec layout (no real_coordinates)
+* Version `2`: Force formspec version 4 (includes real_coordinates)
 
 Misc functions
 --------------
@@ -12,6 +21,66 @@ Grouped by use-case, afterwards sorted alphabetically.
 	* Checks whether creative is enabled or the player has `creative`
 
 
+Callbacks
+---------
+
+Register a callback that will be run whenever a craft is registered via unified_inventory.register_craft.
+This callback is run before any recipe ingredients checks, hence it is also executed on recipes that are
+purged after all mods finished loading.
+
+	unified_inventory.register_on_craft_registered(
+		function (item_name, options)
+			-- item_name (string): name of the output item, equivalent to `ItemStack:get_name()`
+			-- options (table): definition table of crafts registered by `unified_inventory.register_craft`
+		end
+	)
+
+Register a callback that will be run after all mods have loaded and after the unified_inventory mod has initialised all its internal structures:
+
+	unified_inventory.register_on_initialized(callback)
+		-- The callback is passed no arguments
+
+
+Accessing Data
+--------------
+
+These methods should be used instead of accessing the unified_inventory data structures directly - this will ensure your code survives any potential restructuring of the mod.
+
+Get a list of recipes for a particular output item:
+
+	unified_inventory.get_recipe_list(output_item)
+
+	Returns a list of tables, each holding a recipe definition, like:
+	{
+		{
+			type = "normal",
+			items = { "default:stick", "default:stick", "default:stick", "default:stick" },
+			output = "default:wood",
+			width = 2
+		},
+		{
+			type = "shapeless",
+			items = { "default:tree" },
+			output = "default:wood 4",
+			width = 0
+		},
+		...
+	}
+
+Get a list of all the output items crafts have been registered for:
+
+	unified_inventory.get_registered_outputs()
+
+	Returns a list of item names, like:
+	{
+		"default:stone",
+		"default:chest",
+		"default:brick",
+		"doors:door_wood",
+		...
+	}
+
+
 Pages
 -----
 
@@ -93,3 +162,61 @@ Register a non-standard craft recipe:
 		-- ^ Same as `minetest.register_recipe`
 	})
 
+
+Categories
+----------
+
+ * `unified_inventory.register_category(name, def)`
+     * Registers a new category
+     * `name` (string): internal category name
+     * `def` (optional, table): also its fields are optional
+
+	unified_inventory.register_category("category_name", {
+		symbol = source,
+		-- ^ Can be in the format "mod_name:item_name" or "texture.png",
+		label = "Human Readable Label",
+		index = 5,
+		-- ^ Categories are sorted by index. Lower numbers appear before higher ones.
+		--   By default, the name is translated to a number: AA -> 0.0101, ZZ -> 0.2626
+		---  Predefined category indices: "all" = -2, "uncategorized" = -1
+		items = {
+			"mod_name:item_name",
+			"another_mod:different_item"
+		}
+		-- ^ List of items within this category
+	})
+ * `unified_inventory.remove_category(name)`
+     * Removes an entire category
+
+Modifier functions (to be removed)
+
+ * `unified_inventory.set_category_symbol(name, source)`
+     * Changes the symbol of the category. The category does not need to exist yet.
+     * `name` (string): internal category name
+     * `source` (string, optional): `"mod_name:item_name"` or `"texture.png"`.
+       Defaults to `"default:stick"` if not specified.
+ * `unified_inventory.set_category_label(name, label)`
+     * Changes the human readable label of the category.
+     * `name` (string): internal category name
+     * `label` (string): human readable label. Defaults to the category name.
+ * `unified_inventory.set_category_index(name, index)`
+     * Changes the sorting index of the category.
+     * `name` (string): internal category name
+     * `index` (numeric): any real number
+
+Item management
+
+ * `	unified_inventory.add_category_item(name, itemname)`
+     * Adds a single item to the category
+     * `itemname` (string): self-explanatory
+ * `unified_inventory.add_category_items(name, { itemname1, itemname2, ... }`
+     * Same as above but with multiple items
+ * `unified_inventory.remove_category_item(name, itemname)`
+     * Removes an item from the category
+ * `unified_inventory.find_category(itemname)`
+     * Looks up the first category containing this item
+     * Returns: category name (string) or nil
+ * `unified_inventory.find_categories(itemname)`
+     * Looks up the item name within all registered categories
+     * Returns: array of category names (table)
+

group.lua

@@ -1,29 +1,5 @@
 local S = minetest.get_translator("unified_inventory")
-
-function unified_inventory.canonical_item_spec_matcher(spec)
-	local specname = ItemStack(spec):get_name()
-	if specname:sub(1, 6) ~= "group:" then
-		return function (itemname)
-			return itemname == specname
-		end
-	end
-
-	local group_names = specname:sub(7):split(",")
-	return function (itemname)
-		local itemdef = minetest.registered_items[itemname]
-		for _, group_name in ipairs(group_names) do
-			if (itemdef.groups[group_name] or 0) == 0 then
-				return false
-			end
-		end
-		return true
-	end
-end
-
-function unified_inventory.item_matches_spec(item, spec)
-	local itemname = ItemStack(item):get_name()
-	return unified_inventory.canonical_item_spec_matcher(spec)(itemname)
-end
+local ui = unified_inventory
 
 function unified_inventory.extract_groupnames(groupname)
 	local specname = ItemStack(groupname):get_name()
@@ -34,22 +10,6 @@ function unified_inventory.extract_groupnames(groupname)
 	return table.concat(group_names, S(" and ")), #group_names
 end
 
-unified_inventory.registered_group_items = {
-	mesecon_conductor_craftable = "mesecons:wire_00000000_off",
-	stone = "default:cobble",
-	wood = "default:wood",
-	book = "default:book",
-	sand = "default:sand",
-	leaves = "default:leaves",
-	tree = "default:tree",
-	vessel = "vessels:glass_bottle",
-	wool = "wool:white",
-}
-
-function unified_inventory.register_group_item(groupname, itemname)
-	unified_inventory.registered_group_items[groupname] = itemname
-end
-
 
 -- This is used when displaying craft recipes, where an ingredient is
 -- specified by group rather than as a specific item.  A single-item group
@@ -67,6 +27,7 @@ end
 -- It may be a comma-separated list of group names.  This is really a
 -- "group:..." ingredient specification, minus the "group:" prefix.
 
+-- TODO Replace this with the more efficient spec matcher (below)
 local function compute_group_item(group_name_list)
 	local group_names = group_name_list:split(",")
 	local candidate_items = {}
@@ -125,3 +86,61 @@ function unified_inventory.get_group_item(group_name)
 	return group_item_cache[group_name]
 end
 
+
+--[[
+This is for filtering known items by groups
+e.g. find all items that match "group:flower,yellow" (flower AND yellow groups)
+]]
+local spec_matcher = {}
+function unified_inventory.init_matching_cache()
+	for _, name in ipairs(ui.items_list) do
+		-- we only need to care about groups, exact items are handled separately
+		for group, value in pairs(minetest.registered_items[name].groups) do
+			if value and value ~= 0 then
+				if not spec_matcher[group] then
+					spec_matcher[group] = {}
+				end
+				spec_matcher[group][name] = true
+			end
+		end
+	end
+end
+
+--[[
+Retrieves all matching items
+
+Arguments:
+	specname (string): Item name or group(s) to filter
+
+Output:
+	{
+		matchingitem1 = true,
+		...
+	}
+]]
+function unified_inventory.get_matching_items(specname)
+	if specname:sub(1,6) ~= "group:" then
+		return { [specname] = true }
+	end
+
+	local accepted = {}
+	for i, group in ipairs(specname:sub(7):split(",")) do
+		if i == 1 then
+			-- First step: Copy all possible item names in this group
+			for name, _ in pairs(spec_matcher[group] or {}) do
+				accepted[name] = true
+			end
+		else
+			-- Perform filtering
+			if spec_matcher[group] then
+				for name, _ in pairs(accepted) do
+					accepted[name] = spec_matcher[group][name]
+				end
+			else
+				-- No matching items
+				return {}
+			end
+		end
+	end
+	return accepted
+end

init.lua

@@ -1,4 +1,10 @@
--- Unified Inventory for Minetest >= 0.4.16
+-- Unified Inventory
+
+if not minetest.features.formspec_version_element then
+	-- At least formspec_version[] is the minimal feature requirement
+	error("Unified Inventory requires Minetest version 5.4.0 or newer.\n" ..
+		" Please update Minetest or use an older version of Unified Inventory.")
+end
 
 local modpath = minetest.get_modpath(minetest.get_current_modname())
 local worldpath = minetest.get_worldpath()
@@ -10,6 +16,8 @@ unified_inventory = {
 	alternate = {},
 	current_page = {},
 	current_searchbox = {},
+	current_category = {},
+	current_category_scroll = {},
 	current_index = {},
 	current_item = {},
 	current_craft_direction = {},
@@ -22,6 +30,8 @@ unified_inventory = {
 	filtered_items_list = {},
 	pages = {},
 	buttons = {},
+	initialized_callbacks = {},
+	craft_registered_callbacks = {},
 
 	-- Homepos stuff
 	home_pos = {},
@@ -33,23 +43,130 @@ unified_inventory = {
 	-- "Lite" mode
 	lite_mode = minetest.settings:get_bool("unified_inventory_lite"),
 
+	-- Items automatically added to categories based on item definitions
+	automatic_categorization = (minetest.settings:get_bool("unified_inventory_automatic_categorization") ~= false),
+
 	-- Trash enabled
 	trash_enabled = (minetest.settings:get_bool("unified_inventory_trash") ~= false),
+	imgscale = 1.25,
+	list_img_offset = 0.13,
+	standard_background = "bgcolor[#0000]background9[0,0;1,1;ui_formbg_9_sliced.png;true;16]",
 
-	pagecols = 8,
-	pagerows = 10,
-	page_y = 0,
-	formspec_y = 1,
-	main_button_x = 0,
-	main_button_y = 9,
-	craft_result_x = 0.3,
-	craft_result_y = 0.5,
-	form_header_y = 0,
-	standard_background = "background[-0.2,-0.2;1,1;ui_form_bg.png;true]",    -- the 'true' scales to fill, overrides the 1,1
-	standard_inv =        "list[current_player;main;0,YYY;8,4;]",             -- the YYY's are placeholders which get
-	standard_inv_bg =     "image[-0.1,YYY;10.05,4.70;ui_main_inventory.png]", -- replaced later by string.gsub()
+	hide_disabled_buttons = minetest.settings:get_bool("unified_inventory_hide_disabled_buttons", false),
+	hide_uncraftable_items = minetest.settings:get_bool("unified_inventory_hide_uncraftable_items", false),
+
+	version = 5
 }
 
+local ui = unified_inventory
+
+-- These tables establish position and layout for the two UI styles.
+-- UI doesn't use formspec_[xy] anymore, but other mods may need them.
+
+ui.style_full = {
+	formspec_x = 1,
+	formspec_y = 1,
+	formw = 17.75,
+	formh = 12.25,
+	-- Item browser size, pos
+	pagecols = 8,
+	pagerows = 9,
+	page_x = 10.75,
+	page_y = 2.30,
+	-- Item browser controls
+	page_buttons_x = 11.60,
+	page_buttons_y = 10.15,
+	searchwidth = 3.4,
+	-- Crafting grid positions
+	craft_x = 2.8,
+	craft_y = 1.15,
+	craftresult_x = 7.8,
+	craft_arrow_x = 6.55,
+	craft_guide_x = 3.3,
+	craft_guide_y = 1.15,
+	craft_guide_arrow_x = 7.05,
+	craft_guide_result_x = 8.3,
+	craft_guide_resultstr_x = 0.3,
+	craft_guide_resultstr_y = 0.6,
+	give_btn_x = 0.25,
+	-- Tab switching buttons
+	main_button_x = 0.4,
+	main_button_y = 11.0,
+	main_button_cols = 12,
+	main_button_rows = 1,
+	-- Tab title position
+	form_header_x = 0.4,
+	form_header_y = 0.4,
+	-- Generic sizes
+	btn_spc = 0.85,
+	btn_size = 0.75,
+	std_inv_x = 0.3,
+	std_inv_y = 5.75,
+}
+
+ui.style_lite = {
+	formspec_x =  0.6,
+	formspec_y =  0.6,
+	formw = 14,
+	formh = 9.75,
+	-- Item browser size, pos
+	pagecols = 4,
+	pagerows = 5,
+	page_x = 10.5,
+	page_y = 2.15,
+	-- Item browser controls
+	page_buttons_x = 10.5,
+	page_buttons_y = 6.15,
+	searchwidth = 1.6,
+	-- Crafting grid positions
+	craft_x = 2.6,
+	craft_y = 0.75,
+	craftresult_x = 5.75,
+	craft_arrow_x = 6.35,
+	craft_guide_x = 3.1,
+	craft_guide_y = 0.75,
+	craft_guide_arrow_x = 7.05,
+	craft_guide_result_x = 8.3,
+	craft_guide_resultstr_x = 0.15,
+	craft_guide_resultstr_y = 0.35,
+	give_btn_x = 0.15,
+	-- Tab switching buttons
+	main_button_x = 10.5,
+	main_button_y = 8.15,
+	main_button_cols = 4,
+	main_button_rows = 2,
+	-- Tab title position
+	form_header_x =  0.2,
+	form_header_y =  0.2,
+	-- Generic sizes
+	btn_spc = 0.8,
+	btn_size = 0.7,
+	std_inv_x = 0.1,
+	std_inv_y = 4.6,
+}
+
+dofile(modpath.."/api.lua")
+
+for _, style in ipairs({ui.style_full, ui.style_lite}) do
+	style.items_per_page =  style.pagecols * style.pagerows
+	style.standard_inv = string.format("list[current_player;main;%f,%f;8,4;]",
+							style.std_inv_x + ui.list_img_offset, style.std_inv_y + ui.list_img_offset)
+
+	style.standard_inv_bg = ui.make_inv_img_grid(style.std_inv_x, style.std_inv_y, 8, 1, true)..
+							ui.make_inv_img_grid(style.std_inv_x, style.std_inv_y + ui.imgscale, 8, 3)
+
+	style.craft_grid =	table.concat({
+							ui.make_inv_img_grid(style.craft_x, style.craft_y, 3, 3),
+							ui.single_slot(style.craft_x + ui.imgscale*4, style.craft_y), -- the craft result slot
+							string.format("image[%f,%f;%f,%f;ui_crafting_arrow.png]",
+							style.craft_arrow_x, style.craft_y, ui.imgscale, ui.imgscale),
+							string.format("list[current_player;craft;%f,%f;3,3;]",
+								style.craft_x + ui.list_img_offset, style.craft_y + ui.list_img_offset),
+							string.format("list[current_player;craftpreview;%f,%f;1,1;]",
+								style.craftresult_x + ui.list_img_offset, style.craft_y + ui.list_img_offset)
+						})
+end
+
 -- Disable default creative inventory
 local creative = rawget(_G, "creative") or rawget(_G, "creative_inventory")
 if creative then
@@ -65,7 +182,8 @@ if sfinv then
 end
 
 dofile(modpath.."/group.lua")
-dofile(modpath.."/api.lua")
+dofile(modpath.."/category.lua")
+dofile(modpath.."/default-categories.lua")
 dofile(modpath.."/internal.lua")
 dofile(modpath.."/callbacks.lua")
 dofile(modpath.."/match_craft.lua")
@@ -74,9 +192,10 @@ dofile(modpath.."/register.lua")
 if minetest.settings:get_bool("unified_inventory_bags") ~= false then
 	dofile(modpath.."/bags.lua")
 end
-
-dofile(modpath.."/item_names.lua")
-
-if minetest.get_modpath("datastorage") then
+if minetest.settings:get_bool("unified_inventory_item_names") ~= false then
+	dofile(modpath.."/item_names.lua")
+end
+if minetest.settings:get_bool("unified_inventory_waypoints") ~= false then
 	dofile(modpath.."/waypoints.lua")
 end
+dofile(modpath.."/legacy.lua") -- mod compatibility

internal.lua

@@ -1,5 +1,6 @@
 local S = minetest.get_translator("unified_inventory")
 local F = minetest.formspec_escape
+local ui = unified_inventory
 
 -- This pair of encoding functions is used where variable text must go in
 -- button names, where the text might contain formspec metacharacters.
@@ -9,278 +10,368 @@ local F = minetest.formspec_escape
 -- This is a game engine bug, and in the anticipation that it might be
 -- fixed some day we don't want to rely on it.  So for safety we apply
 -- an encoding that avoids all formspec metacharacters.
-function unified_inventory.mangle_for_formspec(str)
+
+function ui.mangle_for_formspec(str)
 	return string.gsub(str, "([^A-Za-z0-9])", function (c) return string.format("_%d_", string.byte(c)) end)
 end
-function unified_inventory.demangle_for_formspec(str)
+function ui.demangle_for_formspec(str)
 	return string.gsub(str, "_([0-9]+)_", function (v) return string.char(v) end)
 end
 
-function unified_inventory.get_per_player_formspec(player_name)
-	local lite = unified_inventory.lite_mode and not minetest.check_player_privs(player_name, {ui_full=true})
+-- Get the player-specific unified_inventory style
+function ui.get_per_player_formspec(player_name)
+	local draw_lite_mode = ui.lite_mode and not minetest.check_player_privs(player_name, {ui_full=true})
 
-	local ui = {}
-	ui.pagecols = unified_inventory.pagecols
-	ui.pagerows = unified_inventory.pagerows
-	ui.page_y = unified_inventory.page_y
-	ui.formspec_y = unified_inventory.formspec_y
-	ui.main_button_x = unified_inventory.main_button_x
-	ui.main_button_y = unified_inventory.main_button_y
-	ui.craft_result_x = unified_inventory.craft_result_x
-	ui.craft_result_y = unified_inventory.craft_result_y
-	ui.form_header_y = unified_inventory.form_header_y
-
-	if lite then
-		ui.pagecols = 4
-		ui.pagerows = 6
-		ui.page_y = 0.25
-		ui.formspec_y = 0.47
-		ui.main_button_x = 8.2
-		ui.main_button_y = 6.5
-		ui.craft_result_x = 2.8
-		ui.craft_result_y = 3.4
-		ui.form_header_y = -0.1
-	end
-
-	ui.items_per_page = ui.pagecols * ui.pagerows
-	return ui, lite
+	local style = table.copy(draw_lite_mode and ui.style_lite or ui.style_full)
+	style.is_lite_mode = draw_lite_mode
+	return style
 end
 
-function unified_inventory.get_formspec(player, page)
+-- Creates an item image or regular image button with a tooltip
+local function formspec_button(ui_peruser, name, image, offset, pos, scale, label)
+	local element = 'image_button'
+	if minetest.registered_items[image] then
+		element = 'item_image_button'
+	elseif image:find(":", 1, true) then
+		image = "unknown_item.png"
+	end
+	local spc = (1-scale)*ui_peruser.btn_size/2
+	local size = ui_peruser.btn_size*scale
+	return string.format("%s[%f,%f;%f,%f;%s;%s;]", element,
+		(offset.x or offset[1]) + ( ui_peruser.btn_spc * (pos.x or pos[1]) ) + spc,
+		(offset.y or offset[2]) + ( ui_peruser.btn_spc * (pos.y or pos[2]) ) + spc,
+		size, size, image, name) ..
+		string.format("tooltip[%s;%s]", name, F(label or name))
+end
+
+-- Add registered buttons (tabs)
+local function formspec_tab_buttons(player, formspec, style)
+	local n = #formspec + 1
+
+	-- Main buttons
+
+	local filtered_inv_buttons = {}
+
+	for _, def in pairs(ui.buttons) do
+		if not (style.is_lite_mode and def.hide_lite) then
+			if def.condition == nil or def.condition(player) or not ui.hide_disabled_buttons then
+				table.insert(filtered_inv_buttons, def)
+			end
+		end
+	end
+
+	local needs_scrollbar = #filtered_inv_buttons > style.main_button_cols * style.main_button_rows
+
+	formspec[n] = ("scroll_container[%g,%g;%g,%g;tabbtnscroll;vertical]"):format(
+		style.main_button_x, style.main_button_y, -- position
+		style.main_button_cols * style.btn_spc, style.main_button_rows -- size
+	)
+	n = n + 1
+
+	for i, def in pairs(filtered_inv_buttons) do
+		local pos_x =           ((i - 1) % style.main_button_cols) * style.btn_spc
+		local pos_y = math.floor((i - 1) / style.main_button_cols) * style.btn_spc
+
+		if def.type == "image" then
+			if (def.condition == nil or def.condition(player)) then
+				formspec[n] = string.format("image_button[%g,%g;%g,%g;%s;%s;]",
+					pos_x, pos_y, style.btn_size, style.btn_size,
+					F(def.image),
+					F(def.name))
+				formspec[n+1] = "tooltip["..F(def.name)..";"..(def.tooltip or "").."]"
+				n = n+2
+
+			else
+				formspec[n] = string.format("image[%g,%g;%g,%g;%s^[colorize:#808080:alpha]",
+					pos_x, pos_y, style.btn_size, style.btn_size,
+					def.image)
+				n = n+1
+			end
+		end
+	end
+	formspec[n] = "scroll_container_end[]"
+	if needs_scrollbar then
+		local total_rows = math.ceil(#filtered_inv_buttons / style.main_button_cols)
+		formspec[n+1] = ("scrollbaroptions[max=%i;arrows=hide]"):format(
+			-- This calculation is not 100% accurate but "good enough"
+			(total_rows - style.main_button_rows) * style.btn_spc * 10
+		)
+		formspec[n+2] = ("scrollbar[%g,%g;0.4,%g;vertical;tabbtnscroll;0]"):format(
+			style.main_button_x + style.main_button_cols * style.btn_spc - 0.1, -- x pos
+			style.main_button_y, -- y pos
+			style.main_button_rows * style.btn_spc -- height
+		)
+		formspec[n+3] = "scrollbaroptions[max=1000;arrows=default]"
+	end
+end
+
+-- Add category GUI elements (top right)
+local function formspec_add_categories(player, formspec, ui_peruser)
+	local player_name = player:get_player_name()
+	local n = #formspec + 1
+
+	local categories_pos = {
+		ui_peruser.page_x,
+		ui_peruser.page_y-ui_peruser.btn_spc-0.5
+	}
+	local categories_scroll_pos = {
+		ui_peruser.page_x,
+		ui_peruser.form_header_y - (ui_peruser.is_lite_mode and 0 or 0.2)
+	}
+
+	formspec[n] = string.format("background9[%f,%f;%f,%f;%s;false;16]",
+		ui_peruser.page_x-0.15, categories_scroll_pos[2],
+		(ui_peruser.btn_spc * ui_peruser.pagecols) + 0.2, 1.4 + (ui_peruser.is_lite_mode and 0 or 0.2),
+		"ui_smallbg_9_sliced.png")
+	n = n + 1
+
+	formspec[n] = string.format("label[%f,%f;%s]",
+		ui_peruser.page_x,
+		ui_peruser.form_header_y + (ui_peruser.is_lite_mode and 0.3 or 0.2), F(S("Category:")))
+	n = n + 1
+
+	local scroll_offset = 0
+	local category_count = #ui.category_list
+	if category_count > ui_peruser.pagecols then
+		scroll_offset = ui.current_category_scroll[player_name]
+	end
+
+	for index, category in ipairs(ui.category_list) do
+		local column = index - scroll_offset
+		if column > 0 and column <= ui_peruser.pagecols then
+			local scale = 0.8
+			if ui.current_category[player_name] == category.name then
+				scale = 1
+			end
+			formspec[n] = formspec_button(ui_peruser, "category_"..category.name, category.symbol, categories_pos, {column-1, 0}, scale, category.label)
+			n = n + 1
+		end
+	end
+	if category_count > ui_peruser.pagecols and scroll_offset > 0 then
+		-- prev
+		formspec[n] = formspec_button(ui_peruser, "prev_category", "ui_left_icon.png", categories_scroll_pos, {ui_peruser.pagecols - 2, 0}, 0.8, S("Scroll categories left"))
+		n = n + 1
+	end
+	if category_count > ui_peruser.pagecols and category_count - scroll_offset > ui_peruser.pagecols then
+		-- next
+		formspec[n] = formspec_button(ui_peruser, "next_category", "ui_right_icon.png", categories_scroll_pos, {ui_peruser.pagecols - 1, 0}, 0.8, S("Scroll categories right"))
+	end
+end
+
+local function formspec_add_search_box(player, formspec, ui_peruser)
+	local player_name = player:get_player_name()
+	local n = #formspec + 1
+
+	formspec[n] = "field_close_on_enter[searchbox;false]"
+
+	formspec[n+1] = string.format("field[%f,%f;%f,%f;searchbox;;%s]",
+		ui_peruser.page_buttons_x, ui_peruser.page_buttons_y,
+		ui_peruser.searchwidth - 0.1, ui_peruser.btn_size,
+		F(ui.current_searchbox[player_name]))
+	formspec[n+2] = string.format("image_button[%f,%f;%f,%f;ui_search_icon.png;searchbutton;]",
+		ui_peruser.page_buttons_x + ui_peruser.searchwidth, ui_peruser.page_buttons_y,
+		ui_peruser.btn_size,ui_peruser.btn_size)
+	formspec[n+3] = "tooltip[searchbutton;" ..F(S("Search")) .. "]"
+	formspec[n+4] = string.format("image_button[%f,%f;%f,%f;ui_reset_icon.png;searchresetbutton;]",
+		ui_peruser.page_buttons_x + ui_peruser.searchwidth + ui_peruser.btn_spc,
+		ui_peruser.page_buttons_y,
+		ui_peruser.btn_size, ui_peruser.btn_size)
+	formspec[n+5] = "tooltip[searchresetbutton;"..F(S("Reset search and display everything")).."]"
+
+	if ui.activefilter[player_name] ~= "" then
+		formspec[n+6] = string.format("label[%f,%f;%s: %s]",
+			ui_peruser.page_x, ui_peruser.page_y - 0.25,
+			F(S("Filter")), F(ui.activefilter[player_name]))
+	end
+end
+
+local function formspec_add_item_browser(player, formspec, ui_peruser)
+	local player_name = player:get_player_name()
+	local n = #formspec + 1
+
+	-- Controls to flip items pages
+
+	local btnlist = {
+		{ "ui_skip_backward_icon.png", "start_list", S("First page") },
+		{ "ui_doubleleft_icon.png",    "rewind3",    S("Back three pages") },
+		{ "ui_left_icon.png",          "rewind1",    S("Back one page") },
+		{ "ui_right_icon.png",         "forward1",   S("Forward one page") },
+		{ "ui_doubleright_icon.png",   "forward3",   S("Forward three pages") },
+		{ "ui_skip_forward_icon.png",  "end_list",   S("Last page") },
+	}
+
+	if ui_peruser.is_lite_mode then
+		btnlist[2] = nil
+		btnlist[5] = nil
+	end
+
+	local bn = 0
+	for _, b in pairs(btnlist) do
+		formspec[n] =  string.format("image_button[%f,%f;%f,%f;%s;%s;]",
+			ui_peruser.page_buttons_x + ui_peruser.btn_spc*bn,
+			ui_peruser.page_buttons_y + ui_peruser.btn_spc,
+			ui_peruser.btn_size, ui_peruser.btn_size,
+			b[1],b[2])
+		formspec[n+1] = "tooltip["..b[2]..";"..F(b[3]).."]"
+		bn = bn + 1
+		n = n + 2
+	end
+
+	-- Items list
+	if #ui.filtered_items_list[player_name] == 0 then
+		local no_matches = S("No matching items")
+		if ui_peruser.is_lite_mode then
+			no_matches = S("No matches.")
+		end
+
+		formspec[n] = "label["..ui_peruser.page_x..","..(ui_peruser.page_y+0.15)..";" .. F(no_matches) .. "]"
+		return
+	end
+
+	local dir = ui.active_search_direction[player_name]
+	local list_index = ui.current_index[player_name]
+	local page2 = math.floor(list_index / (ui_peruser.items_per_page) + 1)
+	local pagemax = math.floor(
+		(#ui.filtered_items_list[player_name] - 1)
+			/ (ui_peruser.items_per_page) + 1)
+	for y = 0, ui_peruser.pagerows - 1 do
+		for x = 0, ui_peruser.pagecols - 1 do
+			local name = ui.filtered_items_list[player_name][list_index]
+			local item = minetest.registered_items[name]
+			if item then
+				-- Clicked on current item: Flip crafting direction
+				if name == ui.current_item[player_name] then
+					local cdir = ui.current_craft_direction[player_name]
+					if cdir == "recipe" then
+						dir = "usage"
+					elseif cdir == "usage" then
+						dir = "recipe"
+					end
+				else
+				-- Default: use active search direction by default
+					dir = ui.active_search_direction[player_name]
+				end
+
+				local button_name = "item_button_" .. dir .. "_"
+					.. ui.mangle_for_formspec(name)
+				formspec[n] = ("item_image_button[%f,%f;%f,%f;%s;%s;]"):format(
+					ui_peruser.page_x + x * ui_peruser.btn_spc,
+					ui_peruser.page_y + y * ui_peruser.btn_spc,
+					ui_peruser.btn_size, ui_peruser.btn_size,
+					name, button_name
+				)
+				local tooltip = item.description
+				if item.mod_origin then
+					-- "mod_origin" may not be specified for items that were
+					-- registered in a callback (during or before ServerEnv init)
+					tooltip = tooltip .. " [" .. item.mod_origin .. "]"
+				end
+				formspec[n + 1] = ("tooltip[%s;%s]"):format(
+					button_name, minetest.formspec_escape(tooltip)
+				)
+				n = n + 2
+			end
+			list_index = list_index + 1
+		end
+	end
+	formspec[n] = "style[page_number;content_offset=0]"
+	formspec[n + 1] = string.format("image_button[%f,%f;%f,0.4;;page_number;%s: %s;false;false;]",
+		ui_peruser.page_buttons_x,
+		ui_peruser.page_buttons_y + ui_peruser.btn_spc * 2 - 0.1,
+		ui_peruser.btn_spc * (bn - 1) + ui_peruser.btn_size,
+		F(S("Page")), S("@1 of @2",page2,pagemax))
+end
+
+function ui.get_formspec(player, page)
 
 	if not player then
 		return ""
 	end
 
 	local player_name = player:get_player_name()
-	local ui_peruser,draw_lite_mode = unified_inventory.get_per_player_formspec(player_name)
+	local ui_peruser = ui.get_per_player_formspec(player_name)
 
-	unified_inventory.current_page[player_name] = page
-	local pagedef = unified_inventory.pages[page]
+	ui.current_page[player_name] = page
+	local pagedef = ui.pages[page]
 
 	if not pagedef then
 		return "" -- Invalid page name
 	end
 
-	local formspec = {
-		"size[14,10]",
+	local fs = {
+		"formspec_version[4]",
+		"size["..ui_peruser.formw..","..ui_peruser.formh.."]",
 		pagedef.formspec_prepend and "" or "no_prepend[]",
-		unified_inventory.standard_background -- Background
+		ui.standard_background
 	}
-	local n = 4
 
-	if draw_lite_mode then
-		formspec[1] = "size[11,7.7]"
-		formspec[3] = unified_inventory.standard_background
-	end
-
-	if unified_inventory.is_creative(player_name)
-	and page == "craft" then
-		formspec[n] = "background[0,"..(ui_peruser.formspec_y + 2)..";1,1;ui_single_slot.png]"
-		n = n+1
-	end
-
-	local perplayer_formspec = unified_inventory.get_per_player_formspec(player_name)
+	local perplayer_formspec = ui.get_per_player_formspec(player_name)
 	local fsdata = pagedef.get_formspec(player, perplayer_formspec)
 
-	formspec[n] = fsdata.formspec
-	n = n+1
+	fs[#fs + 1] = fsdata.formspec
 
-	local button_row = 0
-	local button_col = 0
-
-	-- Main buttons
-
-	local filtered_inv_buttons = {}
-
-	for i, def in pairs(unified_inventory.buttons) do
-		if not (draw_lite_mode and def.hide_lite) then
-			table.insert(filtered_inv_buttons, def)
-		end
-	end
-
-	for i, def in pairs(filtered_inv_buttons) do
-
-		if draw_lite_mode and i > 4 then
-			button_row = 1
-			button_col = 1
-		end
-
-		if def.type == "image" then
-			if (def.condition == nil or def.condition(player) == true) then
-				formspec[n] = "image_button["
-				formspec[n+1] = ( ui_peruser.main_button_x + 0.65 * (i - 1) - button_col * 0.65 * 4)
-				formspec[n+2] = ","..(ui_peruser.main_button_y + button_row * 0.7)..";0.8,0.8;"
-				formspec[n+3] = F(def.image)..";"
-				formspec[n+4] = F(def.name)..";]"
-				formspec[n+5] = "tooltip["..F(def.name)
-				formspec[n+6] = ";"..(def.tooltip or "").."]"
-				n = n+7
-			else
-				formspec[n] = "image["
-				formspec[n+1] = ( ui_peruser.main_button_x + 0.65 * (i - 1) - button_col * 0.65 * 4)
-				formspec[n+2] = ","..(ui_peruser.main_button_y + button_row * 0.7)..";0.8,0.8;"
-				formspec[n+3] = F(def.image).."^[colorize:#808080:alpha]"
-				n = n+4
-
-			end
-		end
-	end
+	formspec_tab_buttons(player, fs, ui_peruser)
 
 	if fsdata.draw_inventory ~= false then
 		-- Player inventory
-		formspec[n] = "listcolors[#00000000;#00000000]"
-		formspec[n+1] = string.gsub(unified_inventory.standard_inv, "YYY", ui_peruser.formspec_y + 3.5)
-		n = n+2
+		fs[#fs + 1] = "listcolors[#00000000;#00000000]"
+		fs[#fs + 1] = ui_peruser.standard_inv
 	end
 
 	if fsdata.draw_item_list == false then
-		return table.concat(formspec, "")
+		return table.concat(fs, "")
 	end
 
-	-- Controls to flip items pages
-	local start_x = 9.2
+	formspec_add_categories(player, fs, ui_peruser)
+	formspec_add_search_box(player, fs, ui_peruser)
+	formspec_add_item_browser(player, fs, ui_peruser)
 
-	if not draw_lite_mode then
-		formspec[n] =
-			"image_button[" .. (start_x + 0.6 * 0)
-				.. ",9;.8,.8;ui_skip_backward_icon.png;start_list;]"
-			.. "tooltip[start_list;" .. F(S("First page")) .. "]"
-
-			.. "image_button[" .. (start_x + 0.6 * 1)
-				.. ",9;.8,.8;ui_doubleleft_icon.png;rewind3;]"
-			.. "tooltip[rewind3;" .. F(S("Back three pages")) .. "]"
-			.. "image_button[" .. (start_x + 0.6 * 2)
-				.. ",9;.8,.8;ui_left_icon.png;rewind1;]"
-			.. "tooltip[rewind1;" .. F(S("Back one page")) .. "]"
-
-			.. "image_button[" .. (start_x + 0.6 * 3)
-				.. ",9;.8,.8;ui_right_icon.png;forward1;]"
-			.. "tooltip[forward1;" .. F(S("Forward one page")) .. "]"
-			.. "image_button[" .. (start_x + 0.6 * 4)
-				.. ",9;.8,.8;ui_doubleright_icon.png;forward3;]"
-			.. "tooltip[forward3;" .. F(S("Forward three pages")) .. "]"
-
-			.. "image_button[" .. (start_x + 0.6 * 5)
-				.. ",9;.8,.8;ui_skip_forward_icon.png;end_list;]"
-			.. "tooltip[end_list;" .. F(S("Last page")) .. "]"
-	else
-		formspec[n] =
-			"image_button[" .. (8.2 + 0.65 * 0)
-				.. ",5.8;.8,.8;ui_skip_backward_icon.png;start_list;]"
-			.. "tooltip[start_list;" .. F(S("First page")) .. "]"
-			.. "image_button[" .. (8.2 + 0.65 * 1)
-				.. ",5.8;.8,.8;ui_left_icon.png;rewind1;]"
-			.. "tooltip[rewind1;" .. F(S("Back one page")) .. "]"
-			.. "image_button[" .. (8.2 + 0.65 * 2)
-				.. ",5.8;.8,.8;ui_right_icon.png;forward1;]"
-			.. "tooltip[forward1;" .. F(S("Forward one page")) .. "]"
-			.. "image_button[" .. (8.2 + 0.65 * 3)
-				.. ",5.8;.8,.8;ui_skip_forward_icon.png;end_list;]"
-			.. "tooltip[end_list;" .. F(S("Last page")) .. "]"
-	end
-	n = n+1
-
-	-- Search box
-	formspec[n] = "field_close_on_enter[searchbox;false]"
-	n = n+1
-
-	if not draw_lite_mode then
-		formspec[n] = "field[9.5,8.325;3,1;searchbox;;"
-			.. F(unified_inventory.current_searchbox[player_name]) .. "]"
-		formspec[n+1] = "image_button[12.2,8.1;.8,.8;ui_search_icon.png;searchbutton;]"
-			.. "tooltip[searchbutton;" ..F(S("Search")) .. "]"
-		formspec[n+2] = "image_button[12.9,8.1;.8,.8;ui_reset_icon.png;searchresetbutton;]"
-			.. "tooltip[searchbutton;" ..F(S("Search")) .. "]"
-			.. "tooltip[searchresetbutton;" ..F(S("Reset search and display everything")) .. "]"
-	else
-		formspec[n] = "field[8.5,5.225;2.2,1;searchbox;;"
-			.. F(unified_inventory.current_searchbox[player_name]) .. "]"
-		formspec[n+1] = "image_button[10.3,5;.8,.8;ui_search_icon.png;searchbutton;]"
-			.. "tooltip[searchbutton;" ..F(S("Search")) .. "]"
-		formspec[n+2] = "image_button[11,5;.8,.8;ui_reset_icon.png;searchresetbutton;]"
-			.. "tooltip[searchbutton;" ..F(S("Search")) .. "]"
-			.. "tooltip[searchresetbutton;" ..F(S("Reset search and display everything")) .. "]"
-	end
-	n = n+3
-
-	local no_matches = S("No matching items")
-	if draw_lite_mode then
-		no_matches = S("No matches.")
-	end
-
-	-- Items list
-	if #unified_inventory.filtered_items_list[player_name] == 0 then
-		formspec[n] = "label[8.2,"..ui_peruser.form_header_y..";" .. F(no_matches) .. "]"
-	else
-		local dir = unified_inventory.active_search_direction[player_name]
-		local list_index = unified_inventory.current_index[player_name]
-		local page2 = math.floor(list_index / (ui_peruser.items_per_page) + 1)
-		local pagemax = math.floor(
-			(#unified_inventory.filtered_items_list[player_name] - 1)
-				/ (ui_peruser.items_per_page) + 1)
-		for y = 0, ui_peruser.pagerows - 1 do
-			for x = 0, ui_peruser.pagecols - 1 do
-				local name = unified_inventory.filtered_items_list[player_name][list_index]
-				local item = minetest.registered_items[name]
-				if item then
-					-- Clicked on current item: Flip crafting direction
-					if name == unified_inventory.current_item[player_name] then
-						local cdir = unified_inventory.current_craft_direction[player_name]
-						if cdir == "recipe" then
-							dir = "usage"
-						elseif cdir == "usage" then
-							dir = "recipe"
-						end
-					else
-					-- Default: use active search direction by default
-						dir = unified_inventory.active_search_direction[player_name]
-					end
-
-					local button_name = "item_button_" .. dir .. "_"
-						.. unified_inventory.mangle_for_formspec(name)
-					formspec[n] = ("item_image_button[%f,%f;.81,.81;%s;%s;]"):format(
-						8.2 + x * 0.7, ui_peruser.formspec_y + ui_peruser.page_y + y * 0.7,
-						name, button_name
-					)
-					formspec[n + 1] = ("tooltip[%s;%s \\[%s\\]]"):format(
-						button_name, minetest.formspec_escape(item.description),
-						item.mod_origin or "??"
-					)
-					n = n + 2
-					list_index = list_index + 1
-				end
-			end
-		end
-		formspec[n] = "label[8.2,"..ui_peruser.form_header_y..";"..F(S("Page")) .. ": "
-			.. S("@1 of @2",page2,pagemax).."]"
-	end
-	n= n+1
-
-	if unified_inventory.activefilter[player_name] ~= "" then
-		formspec[n] = "label[8.2,"..(ui_peruser.form_header_y + 0.4)..";" .. F(S("Filter")) .. ":]"
-		formspec[n+1] = "label[9.1,"..(ui_peruser.form_header_y + 0.4)..";"..F(unified_inventory.activefilter[player_name]).."]"
-	end
-	return table.concat(formspec, "")
+	return table.concat(fs)
 end
 
-function unified_inventory.set_inventory_formspec(player, page)
+function ui.set_inventory_formspec(player, page)
 	if player then
-		player:set_inventory_formspec(unified_inventory.get_formspec(player, page))
+		player:set_inventory_formspec(ui.get_formspec(player, page))
 	end
 end
 
+function ui.is_itemdef_listable(def)
+	return (not def.groups.not_in_creative_inventory
+			or def.groups.not_in_creative_inventory == 0)
+		and def.description
+		and def.description ~= ""
+end
+
 --apply filter to the inventory list (create filtered copy of full one)
-function unified_inventory.apply_filter(player, filter, search_dir)
+function ui.apply_filter(player, filter, search_dir)
 	if not player then
 		return false
 	end
 	local player_name = player:get_player_name()
+
+	-- Whether to show uncraftable items
+	local fprefilter = function(_)
+		return true
+	end
+	if ui.hide_uncraftable_items and not ui.is_creative(player_name) then
+		fprefilter = function(name)
+			return ui.get_recipe_list(name)
+		end
+	end
+
+	local registered_items = minetest.registered_items
 	local lfilter = string.lower(filter)
 	local ffilter
+
 	if lfilter:sub(1, 6) == "group:" then
+		-- Group filter: all groups of the item must match
 		local groups = lfilter:sub(7):split(",")
-		ffilter = function(name, def)
+		ffilter = function(name)
+			local def = registered_items[name]
+			if not def then
+				return false
+			end
+
 			for _, group in ipairs(groups) do
 				if not def.groups[group]
 				or def.groups[group] <= 0 then
@@ -290,8 +381,16 @@ function unified_inventory.apply_filter(player, filter, search_dir)
 			return true
 		end
 	else
-		local lang = minetest.get_player_information(player_name).lang_code
-		ffilter = function(name, def)
+		-- Name filter: fuzzy match item names and descriptions
+		local player_info = minetest.get_player_information(player_name)
+		local lang = player_info and player_info.lang_code or ""
+
+		ffilter = function(name)
+			local def = registered_items[name]
+			if not def then
+				return false
+			end
+
 			local lname = string.lower(name)
 			local ldesc = string.lower(def.description)
 			local llocaldesc = minetest.get_translated_string
@@ -300,78 +399,50 @@ function unified_inventory.apply_filter(player, filter, search_dir)
 				or llocaldesc and string.find(llocaldesc, lfilter, 1, true)
 		end
 	end
-	unified_inventory.filtered_items_list[player_name]={}
-	for name, def in pairs(minetest.registered_items) do
-		if (not def.groups.not_in_creative_inventory
-			or def.groups.not_in_creative_inventory == 0)
-		and def.description
-		and def.description ~= ""
-		and ffilter(name, def) then
-			table.insert(unified_inventory.filtered_items_list[player_name], name)
-		end
-	end
-	table.sort(unified_inventory.filtered_items_list[player_name])
-	unified_inventory.filtered_items_list_size[player_name] = #unified_inventory.filtered_items_list[player_name]
-	unified_inventory.current_index[player_name] = 1
-	unified_inventory.activefilter[player_name] = filter
-	unified_inventory.active_search_direction[player_name] = search_dir
-	unified_inventory.set_inventory_formspec(player,
-	unified_inventory.current_page[player_name])
-end
 
-function unified_inventory.items_in_group(groups)
-	local items = {}
-	for name, item in pairs(minetest.registered_items) do
-		for _, group in pairs(groups:split(',')) do
-			if item.groups[group] then
-				table.insert(items, name)
+	local filtered_items = {}
+
+	local category = ui.current_category[player_name] or 'all'
+	if category == 'all' then
+		for _, name in ipairs(ui.items_list) do
+			if fprefilter(name) and ffilter(name) then
+				table.insert(filtered_items, name)
+			end
+		end
+	elseif category == 'uncategorized' then
+		for _, name in ipairs(ui.items_list) do
+			if not ui.find_category(name)
+					and fprefilter(name)
+					and ffilter(name) then
+				table.insert(filtered_items, name)
+			end
+		end
+	else
+		-- Any other category is selected
+		for name, exists in pairs(ui.registered_category_items[category]) do
+			if exists
+					and fprefilter(name)
+					and ffilter(name) then
+				table.insert(filtered_items, name)
 			end
 		end
 	end
-	return items
+	table.sort(filtered_items)
+
+	ui.filtered_items_list_size[player_name] = #filtered_items
+	ui.filtered_items_list[player_name] = filtered_items
+	ui.current_index[player_name] = 1
+	ui.activefilter[player_name] = filter
+	ui.active_search_direction[player_name] = search_dir
+	ui.set_inventory_formspec(player, ui.current_page[player_name])
 end
 
-function unified_inventory.sort_inventory(inv)
-	local inlist = inv:get_list("main")
-	local typecnt = {}
-	local typekeys = {}
-	for _, st in ipairs(inlist) do
-		if not st:is_empty() then
-			local n = st:get_name()
-			local w = st:get_wear()
-			local m = st:get_metadata()
-			local k = string.format("%s %05d %s", n, w, m)
-			if not typecnt[k] then
-				typecnt[k] = {
-					name = n,
-					wear = w,
-					metadata = m,
-					stack_max = st:get_stack_max(),
-					count = 0,
-				}
-				table.insert(typekeys, k)
-			end
-			typecnt[k].count = typecnt[k].count + st:get_count()
-		end
+-- Inform players about potential visual issues
+minetest.register_on_joinplayer(function(player)
+	local player_name = player:get_player_name()
+	local info = minetest.get_player_information(player_name)
+	if info and (info.formspec_version or 0) < 4 then
+		minetest.chat_send_player(player_name, S("Unified Inventory: Your game version is too old"
+			.. " and does not support the GUI requirements. You might experience visual issues."))
 	end
-	table.sort(typekeys)
-	local outlist = {}
-	for _, k in ipairs(typekeys) do
-		local tc = typecnt[k]
-		while tc.count > 0 do
-			local c = math.min(tc.count, tc.stack_max)
-			table.insert(outlist, ItemStack({
-				name = tc.name,
-				wear = tc.wear,
-				metadata = tc.metadata,
-				count = c,
-			}))
-			tc.count = tc.count - c
-		end
-	end
-	if #outlist > #inlist then return end
-	while #outlist < #inlist do
-		table.insert(outlist, ItemStack(nil))
-	end
-	inv:set_list("main", outlist)
-end
+end)

item_names.lua

@@ -3,6 +3,8 @@
 local item_names = {} -- [player_name] = { hud, dtime, itemname }
 local dlimit = 3  -- HUD element will be hidden after this many seconds
 local hudbars_mod = minetest.get_modpath("hudbars")
+local only_names = minetest.settings:get_bool("unified_inventory_only_names", true)
+local max_length = tonumber(minetest.settings:get("unified_inventory_max_item_name_length")) or 80
 
 local function set_hud(player)
 	local player_name = player:get_player_name()
@@ -16,7 +18,8 @@ local function set_hud(player)
 
 	item_names[player_name] = {
 		hud = player:hud_add({
-			hud_elem_type = "text",
+			-- TODO: remove compatibility code when 5.8.0 is no longer used
+			[minetest.features.hud_def_type_field and "type" or "hud_elem_type"] = "text",
 			position = {x=0.5, y=1},
 			offset = off,
 			alignment = {x=0, y=-1},
@@ -60,6 +63,7 @@ minetest.register_globalstep(function(dtime)
 			data.itemname = itemname
 			data.index = index
 			data.dtime = 0
+			local lang_code = minetest.get_player_information(player:get_player_name()).lang_code
 
 			local desc = stack.get_meta
 				and stack:get_meta():get_string("description")
@@ -69,6 +73,14 @@ minetest.register_globalstep(function(dtime)
 				local def = minetest.registered_items[itemname]
 				desc = def and def.description or ""
 			end
+			if only_names and desc and string.find(desc, "\n") then
+				desc = string.match(desc, "([^\n]*)")
+			end
+			desc = minetest.get_translated_string(lang_code, desc)
+			desc = minetest.strip_colors(desc)
+			if string.len(desc) > max_length and max_length > 0 then
+				desc = string.sub(desc, 1, max_length) .. " [...]"
+			end
 			player:hud_change(data.hud, 'text', desc)
 		end
 	end

legacy.lua

@@ -0,0 +1,55 @@
+-- Inefficient pattern matching
+
+local warned_funcs = {}
+local function LOG_ONCE(funcname)
+	if warned_funcs[funcname] then return end
+	warned_funcs[funcname] = true
+	minetest.log("error", "Call to undocumented, deprecated API '" .. funcname .. "'."
+		.. " In a future version of Unified Inventory this will result in a real error.")
+end
+
+function unified_inventory.canonical_item_spec_matcher(spec)
+	LOG_ONCE("canonical_item_spec_matcher")
+	local specname = ItemStack(spec):get_name()
+	if specname:sub(1, 6) ~= "group:" then
+		return function (itemname)
+			return itemname == specname
+		end
+	end
+
+	local group_names = specname:sub(7):split(",")
+	return function (itemname)
+		local itemdef = minetest.registered_items[itemname]
+		for _, group_name in ipairs(group_names) do
+			if (itemdef.groups[group_name] or 0) == 0 then
+				return false
+			end
+		end
+		return true
+	end
+end
+
+function unified_inventory.item_matches_spec(item, spec)
+	LOG_ONCE("item_matches_spec")
+	local itemname = ItemStack(item):get_name()
+	return unified_inventory.canonical_item_spec_matcher(spec)(itemname)
+end
+
+
+unified_inventory.registered_group_items = {
+	mesecon_conductor_craftable = "mesecons:wire_00000000_off",
+	stone = "default:cobble",
+	wood = "default:wood",
+	book = "default:book",
+	sand = "default:sand",
+	leaves = "default:leaves",
+	tree = "default:tree",
+	vessel = "vessels:glass_bottle",
+	wool = "wool:white",
+}
+
+function unified_inventory.register_group_item(groupname, itemname)
+	LOG_ONCE("register_group_item")
+	unified_inventory.registered_group_items[groupname] = itemname
+end
+

locale/template.txt

@@ -1,54 +1,52 @@
 # textdomain: unified_inventory
-
-# waypoints.lua
-
-White=
-Yellow=
-Red=
-Green=
-Blue=
-Waypoints=
-Select Waypoint #@1=
-Waypoint @1=
-Set waypoint to current location=
-Make waypoint @1=
-invisible=
-visible=
-@1 display of waypoint coordinates=
-Disable=
-Enable=
-Change color of waypoint display=
-Edit waypoint name=
-Waypoint active=
-Waypoint inactive=
-Finish editing=
-World position=
-Name=
-HUD text color=
-
-# group.lua
-
+Mixing=
+Cooking=
+Digging=
+Bags=
+Bag @1=
+Small Bag=
+Medium Bag=
+Large Bag=
+All Items=
+Misc. Items=
+Plant Life=
+Building Materials=
+Tools=
+Minerals and Metals=
+Environment and Worldgen=
+Lighting=
  and =
-
-# register.lua
-
+Scroll categories left=
+Scroll categories right=
+Search=
+Reset search and display everything=
+First page=
+Back three pages=
+Back one page=
+Forward one page=
+Forward three pages=
+Last page=
+No matching items=
+No matches.=
+Page=
+@1 of @2=
+Filter=
 Can use the creative inventory=
 Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=
 Crafting Grid=
 Crafting Guide=
 Set home position=
 Home position set to: @1=
-You don't have the \"home\" privilege!=
+You don't have the "home" privilege!=
 Go home=
 Set time to day=
-Set time to night=
 Time of day set to 6am=
-Time of day set to 9pm=
 You don't have the settime privilege!=
+Set time to night=
+Time of day set to 9pm=
 Clear inventory=
+This button has been disabled outside of creative mode to prevent accidental inventory trashing.@nUse the trash slot instead.=
 Inventory cleared!=
-This button has been disabled outside=
-Crafting=
 Trash:=
 Refill:=
 Any item belonging to the @1 group=
@@ -65,36 +63,28 @@ Show previous recipe=
 Show previous usage=
 @1 (@2)=
 Give me:=
-This recipe is too@nlarge to be displayed.=
+This recipe is too@@large to be displayed.=
 To craft grid:=
 All=
-
-# api.lua
-
-Mixing=
-Cooking=
-Digging=
-
-# internal.lua
-
-First page=
-Back three pages=
-Back one page=
-Forward one page=
-Forward three pages=
-Last page=
-Search=
-Reset search and display everything=
-No matching items=
-No matches.=
-Page=
-@1 of @2=
-Filter=
-
-# bags.lua
-
-Bags=
-Bag @1=
-Small Bag=
-Medium Bag=
-Large Bag=
+Crafting=
+White=
+Yellow=
+Red=
+Green=
+Blue=
+Waypoints=
+Select Waypoint #@1=
+Waypoint @1=
+Set waypoint to current location=
+Hide waypoint=
+Show waypoint=
+Hide coordinates=
+Show coordinates=
+Change color of waypoint display=
+Edit waypoint name=
+Waypoint active=
+Waypoint inactive=
+Finish editing=
+World position=
+Name=
+HUD text color=

locale/unified_inventory.de.tr

@@ -1,5 +1,4 @@
 # textdomain: unified_inventory
-Crafting=Fertigung
 Mixing=Mischen
 Cooking=Kochen
 Digging=Graben
@@ -8,21 +7,32 @@ Bag @1=Tasche @1
 Small Bag=Kleine Tasche
 Medium Bag=Mittelgroße Tasche
 Large Bag=Große Tasche
+All Items=Alle Gegenstände
+Misc. Items=Sonstige Gegenstände
+Plant Life=Pfanzenwelt
+Building Materials=Baumaterialien
+Tools=Werkzeuge
+Minerals and Metals=Minerale und Metalle
+Environment and Worldgen=Umwelt und Welterstellung
+Lighting=Beleuchtung
  and = und 
+Scroll categories left=Kategorien nach links blättern
+Scroll categories right=Kategorien nach rechts blättern
+Search=Suchen
+Reset search and display everything=Suche zurücksetzen und alles anzeigen
 First page=Erste Seite
 Back three pages=3 Seiten zurückblättern
 Back one page=1 Seite zurückblättern
 Forward one page=1 Seite vorblättern
 Forward three pages=3 Seiten vorblättern
 Last page=Letzte Seite
-Search=Suchen
-Reset search and display everything=Suche zurücksetzen und alles anzeigen
 No matching items=Keine passenden Gegenstände
 No matches.=Keine Treffer
 Page=Seite
 @1 of @2=@1 von @2
 Filter=Filter
 Can use the creative inventory=Kann das Kreativinventar nutzen
+Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=Zwingt Unified Inventory, im Vollmodus angezeigt zu werden, wenn der Minimalmodus global eingestellt ist
 Crafting Grid=Fertigungsraster
 Crafting Guide=Fertigungsführer
 Set home position=Heimatposition setzen
@@ -35,6 +45,7 @@ You don't have the settime privilege!=Du hast das „settime“-Privileg nicht!
 Set time to night=Zur Nachtzeit wechseln
 Time of day set to 9pm=Tageszeit auf 21 Uhr gesetzt
 Clear inventory=Inventar leeren
+This button has been disabled outside of creative mode to prevent accidental inventory trashing.@nUse the trash slot instead.=
 Inventory cleared!=Inventar geleert!
 Trash:=Müll:
 Refill:=Nachfüllen:
@@ -50,9 +61,12 @@ Show next recipe=Nächstes Rezept zeigen
 Show next usage=Nächste Verwendung zeigen
 Show previous recipe=Vorheriges Rezept zeigen
 Show previous usage=Vorherige Verwendung zeigen
+@1 (@2)=
 Give me:=Gib mir:
+This recipe is too@@large to be displayed.=
 To craft grid:=Ins Fertigungsraster:
 All=Alles
+Crafting=Fertigung
 White=Weiß
 Yellow=Gelb
 Red=Rot
@@ -62,12 +76,10 @@ Waypoints=Wegpunkte
 Select Waypoint #@1=Wegpunkt Nr. @1 auswählen
 Waypoint @1=Wegpunkt Nr. @1
 Set waypoint to current location=Setze Wegpunkt zur derzeitigen Position
-invisible=unsichtbar
-visible=sichtbar
-Make waypoint @1=Wegpunkt @1 machen
-Disable=ausschalten
-Enable=einschalten
-@1 display of waypoint coordinates=Anzeige der Wegpunktkoordinaten @1
+Hide waypoint=Wegpunkt verstecken
+Show waypoint=Wegpunkt zeigen
+Hide coordinates=Koordinaten verstecken
+Show coordinates=Koordinaten zeigen
 Change color of waypoint display=Farbe der Darstellung der Wegpunkte ändern
 Edit waypoint name=Name des Wegpunkts ändern
 Waypoint active=Wegpunkt aktiv
@@ -76,4 +88,13 @@ Finish editing=Bearbeitung abschließen
 World position=Weltposition
 Name=Name
 HUD text color=HUD-Textfarbe
-Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=Zwingt Unified Inventory, im Vollmodus angezeigt zu werden, wenn der Minimalmodus global eingestellt ist
+
+
+##### not used anymore #####
+
+invisible=unsichtbar
+visible=sichtbar
+Make waypoint @1=Wegpunkt @1 machen
+Disable=ausschalten
+Enable=einschalten
+@1 display of waypoint coordinates=Anzeige der Wegpunktkoordinaten @1

locale/unified_inventory.es.tr

@@ -1,54 +1,57 @@
 # textdomain: unified_inventory
-
-# waypoints.lua
-
-White=Blanco
-Yellow=Amarillo
-Red=Rojo
-Green=Verde
-Blue=Azul
-Waypoints=Puntos
-Select Waypoint #@1=Seleccionar Punto #@1
-Waypoint @1=Punto @1
-Set waypoint to current location=Establecer el punto a la ubicación actual
-Make waypoint @1=Hacer punto @1
-invisible=invisible
-visible=visible
-@1 display of waypoint coordinates=Visualizar coordenadas del punto @1
-Disable=Deshabilitado
-Enable=Habilitado
-Change color of waypoint display=Cambiar el color del punto
-Edit waypoint name=Editar nombre del punto
-Waypoint active=Punto activo
-Waypoint inactive=Punto inactivo
-Finish editing=Terminar edición
-World position=Posición en el mundo
-Name=Nombre
-HUD text color=Color del texto de la Interfaz
-
+# api.lua
+Mixing=Mezclar
+Cooking=Hornear
+Digging=Recoger
+# bags.lua
+Bags=Bolsos
+Bag @1=Bolso @1
+Small Bag=Bolso Pequeño
+Medium Bag=Bolso Mediano
+Large Bag=Bolso Grande
+All Items=
+Misc. Items=
+Plant Life=
+Building Materials=
+Tools=
+Minerals and Metals=
+Environment and Worldgen=
+Lighting=
 # group.lua
-
  and = y
-
+Scroll categories left=
+Scroll categories right=
+Search=Buscar
+Reset search and display everything=Limpiar la busqueda y mostrar todo
+# internal.lua
+First page=Primera página
+Back three pages=Volver tres páginas
+Back one page=Volver una página
+Forward one page=Avanzar una página
+Forward three pages=Avanzar tres páginas
+Last page=Ultima Pagina
+No matching items=No se encontraron elementos
+No matches.=No hay resultados.
+Page=Página
+@1 of @2=@1 de @2
+Filter=Filtro
 # register.lua
-
 Can use the creative inventory=Puede usar el inventario creativo
 Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=Obliga al Inventario Unificado a mostrarse en modo Completo si el modo Simple está configurado globalmente
 Crafting Grid=Cuadricula de Elaboración
 Crafting Guide=Guía de Elaboración
 Set home position=Establecer posición de la casa
 Home position set to: @1=Posición de la casa cambiada a: @1
-You don't have the \"home\" privilege!=¡No tienes el privilegio \"home\"!
+You don't have the "home" privilege!=
 Go home=Ir a casa
 Set time to day=Cambiar a dia
-Set time to night=Cambiar a noche
 Time of day set to 6am=Hora del día cambiada a 6 AM
-Time of day set to 9pm=Hora del día cambiada a 9 PM
 You don't have the settime privilege!=¡No tienes el privilegio "settime"!
+Set time to night=Cambiar a noche
+Time of day set to 9pm=Hora del día cambiada a 9 PM
 Clear inventory=Limpiar inventario
+This button has been disabled outside of creative mode to prevent accidental inventory trashing.@nUse the trash slot instead.=
 Inventory cleared!=¡Inventario limpio!
-This button has been disabled outside=Este botón ha sido deshabilitado
-Crafting=Elaboración
 Trash:=Basura:
 Refill:=Rellenar:
 Any item belonging to the @1 group=Cualquier elemento que pertenezca al grupo @1
@@ -65,36 +68,41 @@ Show previous recipe=Mostrar la receta anterior
 Show previous usage=Mostrar el uso anterior
 @1 (@2)=@1 (@2)
 Give me:=Dame:
-This recipe is too@nlarge to be displayed.=Esta receta es demasiado@ngrande para ser mostrada.
+This recipe is too@@large to be displayed.=
 To craft grid:=Construir:
 All=Todos
+Crafting=Elaboración
+White=Blanco
+Yellow=Amarillo
+Red=Rojo
+Green=Verde
+Blue=Azul
+Waypoints=Puntos
+Select Waypoint #@1=Seleccionar Punto #@1
+Waypoint @1=Punto @1
+Set waypoint to current location=Establecer el punto a la ubicación actual
+Hide waypoint=
+Show waypoint=
+Hide coordinates=
+Show coordinates=
+Change color of waypoint display=Cambiar el color del punto
+Edit waypoint name=Editar nombre del punto
+Waypoint active=Punto activo
+Waypoint inactive=Punto inactivo
+Finish editing=Terminar edición
+World position=Posición en el mundo
+Name=Nombre
+HUD text color=Color del texto de la Interfaz
 
-# api.lua
 
-Mixing=Mezclar
-Cooking=Hornear
-Digging=Recoger
+##### not used anymore #####
 
-# internal.lua
-
-First page=Primera página
-Back three pages=Volver tres páginas
-Back one page=Volver una página
-Forward one page=Avanzar una página
-Forward three pages=Avanzar tres páginas
-Last page=Ultima Pagina
-Search=Buscar
-Reset search and display everything=Limpiar la busqueda y mostrar todo
-No matching items=No se encontraron elementos
-No matches.=No hay resultados.
-Page=Página
-@1 of @2=@1 de @2
-Filter=Filtro
-
-# bags.lua
-
-Bags=Bolsos
-Bag @1=Bolso @1
-Small Bag=Bolso Pequeño
-Medium Bag=Bolso Mediano
-Large Bag=Bolso Grande
+Make waypoint @1=Hacer punto @1
+invisible=invisible
+visible=visible
+@1 display of waypoint coordinates=Visualizar coordenadas del punto @1
+Disable=Deshabilitado
+Enable=Habilitado
+You don't have the \"home\" privilege!=¡No tienes el privilegio \"home\"!
+This button has been disabled outside=Este botón ha sido deshabilitado
+This recipe is too@nlarge to be displayed.=Esta receta es demasiado@ngrande para ser mostrada.

locale/unified_inventory.fr.tr

@@ -1,5 +1,5 @@
 # textdomain: unified_inventory
-Crafting=Création
+Mixing=
 Cooking=Cuisson
 Digging=Creuser
 Bags=Sacs
@@ -7,35 +7,66 @@ Bag @1=Sac @1
 Small Bag=Petit sac
 Medium Bag=Sac moyen
 Large Bag=Grand sac
+All Items=
+Misc. Items=
+Plant Life=
+Building Materials=
+Tools=
+Minerals and Metals=
+Environment and Worldgen=
+Lighting=
  and = et 
+Scroll categories left=
+Scroll categories right=
+Search=Rechercher
+Reset search and display everything=
 First page=1ère page
 Back three pages=3 pages en arrière
 Back one page=Page précédente
 Forward one page=Page suivante
 Forward three pages=3 pages en avant
 Last page=Dernière page
-Search=Rechercher
 No matching items=Aucun élément correspondant
 No matches.=Aucun match
 Page=Page
 @1 of @2=@1 de @2
 Filter=Filtre
 Can use the creative inventory=Vous pouvez utiliser l'inventaire créatif
+Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=
 Crafting Grid=Grille de création
 Crafting Guide=Guide de création
 Set home position=Position dans le monde
 Home position set to: @1=Position de votre base fixée à: @1
 You don't have the "home" privilege!=Vous n'avez pas le privilège "home"!
+Go home=
+Set time to day=
 Time of day set to 6am=Heure fixée à 6h
 You don't have the settime privilege!=Vous n'avez pas le privilège "settime"!
+Set time to night=
 Time of day set to 9pm=Heure fixée à 21h
+Clear inventory=
+This button has been disabled outside of creative mode to prevent accidental inventory trashing.@nUse the trash slot instead.=
 Inventory cleared!=Inventaire vidé !
 Trash:=Poubelle :
 Refill:=Remplir :
+Any item belonging to the @1 group=
+Any item belonging to the groups @1=
 Recipe @1 of @2=Recette @1 de @2
+Usage @1 of @2=
+No recipes=
+No usages=
 Result=Résultat
+Ingredient=
+Show next recipe=
+Show next usage=
+Show previous recipe=
+Show previous usage=
+@1 (@2)=
+Give me:=
+This recipe is too@@large to be displayed.=
 To craft grid:=Sur de création:
 All=Tout
+Crafting=Création
 White=Blanc
 Yellow=Jaune
 Red=Rouge
@@ -45,8 +76,10 @@ Waypoints=Point de passage
 Select Waypoint #@1=Choisir un point de passage #@1
 Waypoint @1=Point de passage @1
 Set waypoint to current location=Marquer un point de passage à la position actuelle
-Make waypoint @1=Rendre @1 le point de passage
-@1 display of waypoint coordinates=@1 montrer les coordonnées des points de passages
+Hide waypoint=
+Show waypoint=
+Hide coordinates=
+Show coordinates=
 Change color of waypoint display=Changer la couleur du point de passage
 Edit waypoint name=Editer le nom du point de passage
 Waypoint active=Point de passage actif
@@ -55,3 +88,9 @@ Finish editing=Terminer l'édition
 World position=Position dans le monde
 Name=Nom
 HUD text color=Couleur de texte du HUD
+
+
+##### not used anymore #####
+
+Make waypoint @1=Rendre @1 le point de passage
+@1 display of waypoint coordinates=@1 montrer les coordonnées des points de passages

locale/unified_inventory.it.tr

@@ -1,5 +1,4 @@
 # textdomain: unified_inventory
-Crafting=Assemblaggio
 Mixing=Unione
 Cooking=Cottura
 Digging=Scavo
@@ -8,21 +7,32 @@ Bag @1=Borsa @1
 Small Bag=Borsa piccola
 Medium Bag=Borsa media
 Large Bag=Borsa grande
+All Items=
+Misc. Items=
+Plant Life=
+Building Materials=
+Tools=
+Minerals and Metals=
+Environment and Worldgen=
+Lighting=
  and = e 
+Scroll categories left=
+Scroll categories right=
+Search=Cerca
+Reset search and display everything=Azzera la ricerca e mostra tutto
 First page=Prima pagina
 Back three pages=Indietro di tre pagine
 Back one page=Indietro di una pagina
 Forward one page=Avanti di una pagina
 Forward three pages=Avanti di tre pagine
 Last page=Ultima pagina
-Search=Cerca
-Reset search and display everything=Azzera la ricerca e mostra tutto
 No matching items=Nessun oggetto corrispondente
 No matches.=Nessuna corrispondenza.
 Page=Pagina
 @1 of @2=@1 di @2
 Filter=Filtro
 Can use the creative inventory=Può usare l'inventario creativo
+Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=Forza la visualizzazione di Unified Inventory in modalità completa se è configurata globalmente la visualizzazione semplice
 Crafting Grid=Griglia di assemblaggio
 Crafting Guide=Guida di assemblaggio
 Set home position=Imposta la residenza
@@ -35,6 +45,7 @@ You don't have the settime privilege!=Non hai il privilegio "time"!
 Set time to night=Imposta l'orario sulla notte
 Time of day set to 9pm=Orario impostato sulle 9am
 Clear inventory=Ripulisci l'inventario
+This button has been disabled outside of creative mode to prevent accidental inventory trashing.@nUse the trash slot instead.=
 Inventory cleared!=Inventario ripulito!
 Trash:=Butta:
 Refill:=Riempi:
@@ -50,9 +61,12 @@ Show next recipe=Mostra la prossima ricetta
 Show next usage=Mostra il prossimo utilizzo
 Show previous recipe=Mostra la ricetta precedente
 Show previous usage=Mostra l'utilizzo precedente
+@1 (@2)=
 Give me:=Dammi:
+This recipe is too@@large to be displayed.=
 To craft grid:=Alla griglia di assemblaggio:
 All=Tutto
+Crafting=Assemblaggio
 White=Bianco
 Yellow=Giallo
 Red=Rosso
@@ -62,12 +76,10 @@ Waypoints=Tappe
 Select Waypoint #@1=Seleziona tappa n°@1
 Waypoint @1=Tappa @1
 Set waypoint to current location=Imposta tappa alla posizione attuale
-invisible=invisibile
-visible=visibile
-Make waypoint @1=Crea tappa @1
-Disable=Disabilita
-Enable=Abilita
-@1 display of waypoint coordinates=@1 la visualizzazione delle coordinate della tappa
+Hide waypoint=
+Show waypoint=
+Hide coordinates=
+Show coordinates=
 Change color of waypoint display=Modifica il colore della visualizzazione della tappa
 Edit waypoint name=Modifica il nome della tappa
 Waypoint active=Tappa attiva
@@ -76,4 +88,13 @@ Finish editing=Termina la modifica
 World position=Posizione del mondo
 Name=Nome
 HUD text color=Colore del testo del visore
-Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=Forza la visualizzazione di Unified Inventory in modalità completa se è configurata globalmente la visualizzazione semplice
+
+
+##### not used anymore #####
+
+invisible=invisibile
+visible=visibile
+Make waypoint @1=Crea tappa @1
+Disable=Disabilita
+Enable=Abilita
+@1 display of waypoint coordinates=@1 la visualizzazione delle coordinate della tappa

locale/unified_inventory.ms.tr

@@ -1,5 +1,4 @@
 # textdomain: unified_inventory
-Crafting=Pertukangan
 Mixing=Pencampuran
 Cooking=Pemasakan
 Digging=Penggalian
@@ -8,21 +7,32 @@ Bag @1=Beg @1
 Small Bag=Beg Kecil
 Medium Bag=Beg Sederhana
 Large Bag=Beg Besar
+All Items=
+Misc. Items=
+Plant Life=
+Building Materials=
+Tools=
+Minerals and Metals=
+Environment and Worldgen=
+Lighting=
  and = dan 
+Scroll categories left=
+Scroll categories right=
+Search=Cari
+Reset search and display everything=Set semula carian dan tunjukkan semua benda
 First page=Halaman pertama
 Back three pages=Tiga halaman sebelumnya
 Back one page=Halaman sebelumnya
 Forward one page=Halaman seterusnya
 Forward three pages=Tiga halaman seterusnya
 Last page=Halaman terakhir
-Search=Cari
-Reset search and display everything=Set semula carian dan tunjukkan semua benda
 No matching items=Tiada item sepadan
 No matches.=Tiada padanan.
 Page=Halaman
 @1 of @2=@1 drpd @2
 Filter=Tapis
 Can use the creative inventory=Boleh guna inventori kreatif
+Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=
 Crafting Grid=Grid Pertukangan
 Crafting Guide=Panduan Pertukangan
 Set home position=Tetapkan kedudukan rumah
@@ -35,6 +45,7 @@ You don't have the settime privilege!=Anda tidak ada keistimewaan settime!
 Set time to night=Tetapkan masa jadi malam
 Time of day set to 9pm=Masa ditetapkan ke 9 malam
 Clear inventory=Kosongkan inventori
+This button has been disabled outside of creative mode to prevent accidental inventory trashing.@nUse the trash slot instead.=
 Inventory cleared!=Inventori dikosongkan!
 Trash:=Buang:
 Refill:=Isi balik:
@@ -52,7 +63,10 @@ Show previous recipe=Tunjuk resipi sebelumnya
 Show previous usage=Tunjuk kegunaan sebelumnya
 @1 (@2)=@1 (@2)
 Give me:=Beri saya:
+This recipe is too@@large to be displayed.=
 To craft grid:=Ke grid pertukangan:
+All=
+Crafting=Pertukangan
 White=Putih
 Yellow=Kuning
 Red=Merah
@@ -62,12 +76,10 @@ Waypoints=Titik Arah
 Select Waypoint #@1=Pilih Titik Arah #@1
 Waypoint @1=Titik Arah @1
 Set waypoint to current location=Tetapkan titik arah ke lokasi semasa
-invisible=Sembunyikan
-visible=Paparkan
-Make waypoint @1=@1 titik arah
-Disable=Sembunyikan
-Enable=Paparkan
-@1 display of waypoint coordinates=@1 koordinat untuk titik arah
+Hide waypoint=
+Show waypoint=
+Hide coordinates=
+Show coordinates=
 Change color of waypoint display=Tukar warna paparan titik arah
 Edit waypoint name=Edit nama titik arah
 Waypoint active=Titik arah aktif
@@ -76,3 +88,13 @@ Finish editing=Selesai edit
 World position=Kedudukan dunia
 Name=Nama
 HUD text color=Warna tulisan HUD
+
+
+##### not used anymore #####
+
+invisible=Sembunyikan
+visible=Paparkan
+Make waypoint @1=@1 titik arah
+Disable=Sembunyikan
+Enable=Paparkan
+@1 display of waypoint coordinates=@1 koordinat untuk titik arah

locale/unified_inventory.pl.tr

@@ -1,61 +1,91 @@
 # textdomain: unified_inventory
+Category:=Kategorie:
+Mixing=Miksowanie
+Cooking=Gotowanie
+Digging=Kopanie
 Bags=Plecaki
 Bag @1=Plecak @1
-Small Bag=Maly plecak
-Medium Bag=Sredni plecak
-Large Bag=Duzy plecak
+Small Bag=Mały plecak
+Medium Bag=Średni plecak
+Large Bag=Duży plecak
+All Items=Wszystkie przedmioty
+Misc. Items=Różne przedmioty
+Plant Life=Życie roślin
+Building Materials=Materiały budowlane
+Tools=Narzędzia
+Minerals and Metals=Minerały i metale
+Environment and Worldgen=Otoczenie i generowanie świata
+Lighting=Oświetlenie
  and = i 
-First page=Pierwsza strona
-Back three pages=3 strony w tyl
-Back one page=1 strona w tyl
-Forward one page=1 strona do przodu
-Forward three pages=3 strony do przodu
-Last page=Ostatnia strona
+Scroll categories left=Przewiń kategorię w lewo
+Scroll categories right=Przewiń kategorię w prawo
 Search=Szukaj
-No matching items=Brak pasujacych przedmiotow
+Reset search and display everything=Zresetuj wyszukiwanie i pokaż wszystko
+First page=Pierwsza strona
+Back three pages=Trzy strony do tyłu
+Back one page=Stronę do tyłu
+Forward one page=Stronę do przodu
+Forward three pages=Trzy strony do przodu
+Last page=Ostatnia strona
+No matching items=Brak pasujących przedmiotów
 No matches.=Brak wyników
 Page=Strona
 @1 of @2=@1 z @2
 Filter=Filtr
-Set home position=Ustaw pozycję wyjściową
-Home position set to: @1=Pozycja domowa ustawiona na: @1
-You don't have the "home" privilege!=Nie masz uprawnien do zmiany czasu "home"!
+Can use the creative inventory=Może używać kreatywnego ekwipunku
+Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=Wymusza wyświetlanie Unified Inventory w trybie Full jeżeli tryb Lite jest skonfigurowany globalnie
+Crafting Grid=Siatka craftingu
+Crafting Guide=Przewodnik craftingu
+Set home position=Ustaw pozycję domu
+Home position set to: @1=Pozycja domu ustawiona na: @1
+You don't have the "home" privilege!=Brak uprawnień "home"!
 Go home=Idź do domu
 Set time to day=Ustaw czas na dzień
 Time of day set to 6am=Czas ustawiony na 6:00
-You don't have the settime privilege!=Nie masz uprawnien do zmiany czasu "settime"!
+You don't have the settime privilege!=Brak uprawnień "settime"!
 Set time to night=Ustaw czas na noc
 Time of day set to 9pm=Czas ustawiony na 21:00
-Clear inventory=Wyczyść zapasy
-Inventory cleared!=Zapasy zostały wyczyszczone!
-Trash:=Smietnik:
-Refill:=Uzupelnianie:
+Clear inventory=Wyczyść ekwipunek
+This button has been disabled outside of creative mode to prevent accidental inventory trashing.@nUse the trash slot instead.=Aby zapobiec przypadkowemu skasowaniu ekwipunku, ten przycisk został wyłączony poza trybem kreatywnym.@nUżyj zamiast tego ikony śmietnika.
+Inventory cleared!=Ekwipunek został wyczyszczony!
+Trash:=Śmietnik:
+Refill:=Uzupełnianie:
+Any item belonging to the @1 group=Każdy przedmiot należący do @1 grupy
+Any item belonging to the groups @1=Każdy przedmiot należacy do grup @1
 Recipe @1 of @2=Recepta @1 z @2
 Usage @1 of @2=Użycie @1 z @2
 No recipes=Brak recepty
 No usages=Bez użycia
 Result=Wynik
 Ingredient=Składnik
+Show next recipe=Pokaż nastepną recepturę
+Show next usage=Pokaż następne użycie
+Show previous recipe=Pokaż poprzednią recepturę
+Show previous usage=Pokaż poprzednie użycie
+@1 (@2)=@1 (@2)
 Give me:=Daj mi:
+This recipe is too@@large to be displayed.=Receptura jest zbyt@@duża aby ją wyświetlić.
+To craft grid:=Do siatki craftingu.
 All=Wszystko
-White=Bialy
-Yellow=Zolty
+Crafting=Crafting
+White=Biały
+Yellow=Zółty
 Red=Czerwony
 Green=Zielony
 Blue=Niebieski
 Waypoints=Punkty orientacyjne
 Select Waypoint #@1=Wybierz punkt #@1
 Waypoint @1=Punkty orientacyjne @1
-Set waypoint to current location=Ustaw punkt orientacyjny na biezacej pozycji
-invisible=niewidzialny
-visible=widomy
-Make waypoint @1=Robić punkt @1
-@1 display of waypoint coordinates=@1 koordynatow punktu
-Change color of waypoint display=Zmien kolor punktu
-Edit waypoint name=Edytuj nazwe punktu
-Waypoint active=Punkt wlaczony
-Waypoint inactive=Punkt wylaczony
-Finish editing=Zakoncz edycje
+Set waypoint to current location=Ustaw punkt orientacyjny na bieżacej pozycji
+Hide waypoint=Ukryj punkt orientacyjny
+Show waypoint=Pokaż punkt orientacyjny
+Hide coordinates=Ukryj koordynaty
+Show coordinates=Pokaż koordynaty
+Change color of waypoint display=Zmień kolor punktu
+Edit waypoint name=Edytuj nazwę punktu
+Waypoint active=Punkt włączony
+Waypoint inactive=Punkt wyłączony
+Finish editing=Zakończ edycję
 World position=Pozycja
 Name=Nazwa
-HUD text color=Kolor tekstu HUD
+HUD text color=Kolor tekstu HUD

locale/unified_inventory.pt.tr

@@ -1,5 +1,4 @@
 # textdomain: unified_inventory
-Crafting=Artesanato
 Mixing=Muistura
 Cooking=Cozimento
 Digging=Escavação
@@ -8,21 +7,32 @@ Bag @1=Bolsa @1
 Small Bag=Bolsa Pequena
 Medium Bag=Bolsa Média
 Large Bag=Bolsa Grande
+All Items=
+Misc. Items=
+Plant Life=
+Building Materials=
+Tools=
+Minerals and Metals=
+Environment and Worldgen=
+Lighting=
  and = e 
+Scroll categories left=
+Scroll categories right=
+Search=Pesquisar
+Reset search and display everything=Redefinir pesquisa e exibir tudo
 First page=Primeira Página
 Back three pages=Voltar 3 Páginas
 Back one page=Voltar 1 Página
 Forward one page=Avançar 1 Página
 Forward three pages=Avançar 3 Páginas
 Last page=Ultima Página
-Search=Pesquisar
-Reset search and display everything=Redefinir pesquisa e exibir tudo
 No matching items=Nenhum item correspondente
 No matches.=Sem correspondências
 Page=Página
 @1 of @2=@1 de @2
 Filter=Filtro
 Can use the creative inventory=Pode usar o inventário do criativo
+Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=
 Crafting Grid=Grade de Artesanato
 Crafting Guide=Guia de Artesanato
 Set home position=Definir posição de casa
@@ -35,6 +45,7 @@ You don't have the settime privilege!=Você não tem o privilégio de "settime"!
 Set time to night=Definir turno para noite
 Time of day set to 9pm=Hora do dia ajustada para 21h
 Clear inventory=Limpar Inventário
+This button has been disabled outside of creative mode to prevent accidental inventory trashing.@nUse the trash slot instead.=
 Inventory cleared!=Inventário Apagado!
 Trash:=Lixo:
 Refill:=Recarga:
@@ -50,9 +61,12 @@ Show next recipe=Exibir Próxima Receita
 Show next usage=Mostrar Próxima Utilização
 Show previous recipe=Exibir Receita Anterior
 Show previous usage=Exibir Utilização Anterior
+@1 (@2)=
 Give me:=Gerado:
+This recipe is too@@large to be displayed.=
 To craft grid:=Para Grade de Artesanato
 All=MAX
+Crafting=Artesanato
 White=Branco
 Yellow=Amarelo
 Red=Vermelho
@@ -62,10 +76,10 @@ Waypoints=Apontador de Direção
 Select Waypoint #@1=Seleção de Apontador de Direção #@1
 Waypoint @1=Apontador de Direção @1
 Set waypoint to current location=Configurar localização atual do Apontador de Direção
-invisible=invisível
-visible=visível
-Make waypoint @1=Fazer Apontador de Direção @1
-@1 display of waypoint coordinates=@1 exibição de coordenadas de Fazer Apontador de Direção
+Hide waypoint=
+Show waypoint=
+Hide coordinates=
+Show coordinates=
 Change color of waypoint display=Mudar cor exibida do Apontador de Direção
 Edit waypoint name=Editar Nome de Apontador de Direção
 Waypoint active=Apontador de Direção Ativo
@@ -74,3 +88,11 @@ Finish editing=Edição Finalizada
 World position=Posição Mundial
 Name=Nome
 HUD text color=Cor de HUD
+
+
+##### not used anymore #####
+
+invisible=invisível
+visible=visível
+Make waypoint @1=Fazer Apontador de Direção @1
+@1 display of waypoint coordinates=@1 exibição de coordenadas de Fazer Apontador de Direção

locale/unified_inventory.ru.tr

@@ -1,28 +1,38 @@
 # textdomain: unified_inventory
-Crafting=Крафт
 Mixing=Мешать
-Cooking=Варить
+Cooking=Готовить
 Digging=Копать
 Bags=Сумки
 Bag @1=Сумка @1
 Small Bag=Малая сумка
 Medium Bag=Средняя сумка
 Large Bag=Большая сумка
+All Items=Все предметы
+Misc. Items=Разн. предметы
+Plant Life=Растения
+Building Materials=Стройматериалы
+Tools=Инструменты
+Minerals and Metals=Металлы и минералы
+Environment and Worldgen=Окружение и генер.мира
+Lighting=Освещение
  and = и 
+Scroll categories left=Листать влево
+Scroll categories right=Листать вправо
+Search=Поиск
+Reset search and display everything=Сброс поиска, показать всё
 First page=Первая страница
 Back three pages=3 страницы назад
 Back one page=1 страницу назад
 Forward one page=1 страницу вперёд
 Forward three pages=3 страницы вперёд
 Last page=Последняя страница
-Search=Поиск
-Reset search and display everything=Сброс поиска, показать всё
 No matching items=Нет подходящих элементов
 No matches.=Ничего не найдено
 Page=Страница
 @1 of @2=@1 из @2
 Filter=Фильтр
 Can use the creative inventory=Можно использовать инвентарь творческого режима
+Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=Отображает инвентарь в полном режиме, если простой режим установлен глобально
 Crafting Grid=Решетка крафта
 Crafting Guide=Книга рецептов
 Set home position=Установить позицию дома
@@ -35,6 +45,7 @@ You don't have the settime privilege!=Вам не разрешено устан
 Set time to night=Ночь
 Time of day set to 9pm=Установлено время 9 вечера
 Clear inventory=Очистить инвентарь
+This button has been disabled outside of creative mode to prevent accidental inventory trashing.@nUse the trash slot instead.=
 Inventory cleared!=Инвентарь очищен!
 Trash:=Мусор:
 Refill:=Наполнить:
@@ -48,11 +59,14 @@ Result=Результат
 Ingredient=Состав
 Show next recipe=Следующий рецепт
 Show next usage=Следующее использование
-Show previous recipe=Прошлый рецепт
-Show previous usage=Прошлая страница
+Show previous recipe=Предыдущий рецепт
+Show previous usage=Предыдущая страница
+@1 (@2)=
 Give me:=Дай мне:
+This recipe is too@@large to be displayed.=Этот рецепт слишком большой
 To craft grid:=На решeтку крафта:
 All=Все
+Crafting=Крафт
 White=Белый
 Yellow=Желтый
 Red=Красный
@@ -62,12 +76,10 @@ Waypoints=Путевые точки
 Select Waypoint #@1=Выбрать путевую точку №@1
 Waypoint @1=Путевая точка @1
 Set waypoint to current location=Установить путевую точку по текущей позиции
-invisible=невидимой
-visible=видимой
-Make waypoint @1=Сделать путевую точку @1
-Disable=Выключить
-Enable=Включить
-@1 display of waypoint coordinates=@1 показ координат путевых точек
+Hide waypoint=Скрыть точку
+Show waypoint=Показать точку
+Hide coordinates=Скрыть координаты
+Show coordinates=Показать координаты
 Change color of waypoint display=Поменять цвет путевой точки
 Edit waypoint name=Переименовать путевую точку
 Waypoint active=Путевая точка включена
@@ -76,3 +88,4 @@ Finish editing=Закончить редакцию
 World position=Позиция мира
 Name=Имя
 HUD text color=Цвет текста HUDа
+Category:=Категории:

locale/unified_inventory.tr.tr

@@ -1,5 +1,4 @@
 # textdomain: unified_inventory
-Crafting=Üretim
 Mixing=Karıştırma
 Cooking=Pişirme
 Digging=Kazma
@@ -8,20 +7,32 @@ Bag @1=@1. Çanta
 Small Bag=Küçük Çanta
 Medium Bag=Çanta
 Large Bag=Büyük Çanta
+All Items=
+Misc. Items=
+Plant Life=
+Building Materials=
+Tools=
+Minerals and Metals=
+Environment and Worldgen=
+Lighting=
  and = ve 
+Scroll categories left=
+Scroll categories right=
+Search=Ara
+Reset search and display everything=
 First page=İlk Sayfa
 Back three pages=3 Sayfa Gerile
 Back one page=Geri
 Forward one page=İleri
 Forward three pages=3 Sayfa İlerile
 Last page=Son Sayfa
-Search=Ara
 No matching items=Eşleşme yok
 No matches.=Eşleşme yok
 Page=Sayfa
 @1 of @2=@1 dan @2
 Filter=Süzgeç
 Can use the creative inventory=Yaratıcı envanteri kullanabilir
+Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=
 Crafting Grid=Üretim tablosu
 Crafting Guide=Kılavuz
 Set home position=Set ev pozisyon
@@ -33,19 +44,29 @@ Time of day set to 6am=Saat 06:00 olarak ayarlandı
 You don't have the settime privilege!="settime" yetkiniz yok!
 Set time to night=Geceye zaman ayarla
 Time of day set to 9pm=Saat 19:00 olarak ayarlandı
-msgid ""=Yaratıcı modu dışında iken bu tuş kullanılamaz.
+Clear inventory=
+This button has been disabled outside of creative mode to prevent accidental inventory trashing.@nUse the trash slot instead.=
 Inventory cleared!=Envanter temizlendi!
 Trash:=Çöp
 Refill:=Doldur
+Any item belonging to the @1 group=
+Any item belonging to the groups @1=
 Recipe @1 of @2=@1 dan @2 tarifi
 Usage @1 of @2=Kullanım @1/@2
 No recipes=Tarifi yok
 No usages=Kullanım yok
 Result=Çıktı
 Ingredient=Bileşen
+Show next recipe=
+Show next usage=
+Show previous recipe=
+Show previous usage=
+@1 (@2)=
 Give me:=Ver bana:
+This recipe is too@@large to be displayed.=
 To craft grid:=Üretim tablosuna kopyala
 All=Tümü
+Crafting=Üretim
 White=Beyaz
 Yellow=Sarı
 Red=Kırmızı
@@ -55,10 +76,10 @@ Waypoints=Konum Noktaları
 Select Waypoint #@1=#@1 konum noktası seç
 Waypoint @1=@1 Konum Noktaları
 Set waypoint to current location=Bulunduğun noktayı işaretle
-invisible=görünmez
-visible=görünür
-Make waypoint @1=Yol noktası @1
-@1 display of waypoint coordinates=Yol noktası koordinatlarının görüntülenmesini @1
+Hide waypoint=
+Show waypoint=
+Hide coordinates=
+Show coordinates=
 Change color of waypoint display=Konum Gösterge Rengi
 Edit waypoint name=Konum Noktasını Düzenle
 Waypoint active=Konum Etkin
@@ -67,3 +88,12 @@ Finish editing=Düzenleme bitti
 World position=Dünya konumu
 Name=İsim
 HUD text color=Metin rengi
+
+
+##### not used anymore #####
+
+msgid ""=Yaratıcı modu dışında iken bu tuş kullanılamaz.
+invisible=görünmez
+visible=görünür
+Make waypoint @1=Yol noktası @1
+@1 display of waypoint coordinates=Yol noktası koordinatlarının görüntülenmesini @1

locale/unified_inventory.uk.tr

@@ -0,0 +1,92 @@
+# textdomain: unified_inventory
+Replaces the default inventory and adds a number of features, such as a crafting guide=Замінює стандартний інвентар та додає ряд особливостей, таких як книга рецептів
+Mixing=Перемішати
+Cooking=Виплавити
+Digging=Викопати
+Bags=Сумки
+Bag @1=Сумка @1
+Small Bag=Мала сумка
+Medium Bag=Середня сумка
+Large Bag=Велика сумка
+All Items=Все
+Misc. Items=Різне
+Plant Life=Рослини
+Building Materials=Будматеріали
+Tools=Інструменти
+Minerals and Metals=Руди й метали
+Environment and Worldgen=Оточення та генерація світу
+Lighting=Освітлення
+ and = та
+Scroll categories left=Ліворуч
+Scroll categories right=Праворуч
+Search=Пошук
+Reset search and display everything=Скинути пошук та відобразити усе
+First page=Перша сторінка
+Back three pages=3 сторінки назад
+Back one page=Попередня сторінка
+Forward one page=Наступна сторінка
+Forward three pages=3 сторінки вперед
+Last page=Остання сторінка
+No matching items=Не знайдено предметів
+No matches.=Немає результатів.
+Page=Сторінка
+@1 of @2=@1 з @2
+Filter=Фільтр
+Can use the creative inventory=Можна використовувати творчий інвентар
+Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=Відображає повний режим, якщо простий режим сконфігуровано глобально
+Crafting Grid=Сітка майстрування
+Crafting Guide=Книга рецептів
+Set home position=Встановити позицію дому
+Home position set to: @1=Тепер дім розташований по координатам: @1
+You don't have the "home" privilege!=У вас немає привілею "home"!
+Go home=Додому
+Set time to day=День
+Time of day set to 6am=Час встановлено на 6:00
+You don't have the settime privilege!=Ви не можете встановлювати час (нема привілею "settime")
+Set time to night=Ніч
+Time of day set to 9pm=Час встановлено на 21:00
+Clear inventory=Очистити інвентар
+This button has been disabled outside of creative mode to prevent accidental inventory trashing.@nUse the trash slot instead.=Цю кнопку було вимкнено в творчому режимі, щоб запобігти випадковому очищенню інвентаря.@nВикористовуйте слот смітника натомість.
+Inventory cleared!=Інвентар очищено!
+Trash:=Смітник:
+Refill:=Заповнити:
+Any item belonging to the @1 group=Будь-який елемент із групи @1
+Any item belonging to the groups @1=Будь-який елемент із груп @1
+Recipe @1 of @2=Рецепт @1 із @2
+Usage @1 of @2=Використання @1 із @2
+No recipes=Немає рецептів
+No usages=Ніде не використовується
+Result=Результат
+Ingredient=Інгредієнт
+Show next recipe=Наступний рецепт
+Show next usage=Наступне використання
+Show previous recipe=Попередній рецепт
+Show previous usage=Попереднє використання
+@1 (@2)=@1 (@2)
+Give me:=Дай мені:
+This recipe is too@@large to be displayed.=Цей рецепт надто великий, щоб його відобразити
+To craft grid:=На сітку крафту:
+All=Все
+Crafting=Крафт
+White=Білий
+Yellow=Жовтий
+Red=Червоний
+Green=Зелений
+Blue=Синій
+Waypoints=Геомітки
+Select Waypoint #@1=Вибрати геомітку №@1
+Waypoint @1=Геомітка @1
+Set waypoint to current location=Встановити тут
+Hide waypoint=Сховати геомітку
+Show waypoint=Показати геомітку
+Hide coordinates=Сховати координати
+Show coordinates=Показати координати
+Change color of waypoint display=Змінити колір геомітки
+Edit waypoint name=Перейменувати геомітку
+Waypoint active=Геомітку показано
+Waypoint inactive=Геомітку приховано
+Finish editing=Закінчити редагування
+World position=Світова позиція
+Name=Назва
+HUD text color=Колір тексту
+Category:=Категорії:

locale/unified_inventory.zh_CN.tr

@@ -1,8 +1,4 @@
 # textdomain: unified_inventory
-# traslation by: IFRFSX(BingFengFSX)
-#Email: IFRFSX@Protonmail.com
-
-Crafting=合成
 Mixing=混合
 Cooking=烹饪
 Digging=挖出
@@ -11,20 +7,32 @@ Bag @1=背包@1
 Small Bag=小背包
 Medium Bag=中背包
 Large Bag=大背包
+All Items=所有物品
+Misc. Items=杂项
+Plant Life=植物
+Building Materials=建材
+Tools=工具
+Minerals and Metals=矿物与金属
+Environment and Worldgen=自然环境
+Lighting=光源
  and = 和 
+Scroll categories left=向左滚动分类栏
+Scroll categories right=向右滚动分类栏
+Search=搜索
+Reset search and display everything=重置搜索并显示所有物品
 First page=第一页
 Back three pages=后退三页
 Back one page=后退一页
 Forward one page=前进一页
 Forward three pages=前进三页
 Last page=最后一页
-Search=搜索
 No matching items=没有匹配物品
 No matches.=没有匹配
 Page=页面
 @1 of @2=第@1页，共@2页
 Filter=过滤器
 Can use the creative inventory=可以使用创造背包
+Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=如果轻量模式被全局配置，强迫Unified Inventory以完全模式展现。
 Crafting Grid=合成表
 Crafting Guide=合成指南
 Set home position=设置家的位置
@@ -36,21 +44,29 @@ Time of day set to 6am=时间设置到早晨6点
 You don't have the settime privilege!=你没有“settime”权限！
 Set time to night=设置时间到晚上
 Time of day set to 9pm=时间设置到晚上9点
-
-Inventory cleared!=清空背包
 Clear inventory=清空背包
-
+This button has been disabled outside of creative mode to prevent accidental inventory trashing.@nUse the trash slot instead.=此按钮已在非创造模式中禁用以防止意外的背包清空。@n请使用垃圾桶栏。
+Inventory cleared!=清空背包
 Trash:=丢弃：
 Refill:=填满：
+Any item belonging to the @1 group=属于@1组的任何项目
+Any item belonging to the groups @1=属于组@1的任何项目
 Recipe @1 of @2=第@1配方，共@2个
 Usage @1 of @2=第@1用法，共@2个
 No recipes=没有配方
 No usages=没有用法
 Result=结果
 Ingredient=原料
+Show next recipe=显示下一个配方
+Show next usage=显示下一个用法
+Show previous recipe=显示前一个配方
+Show previous usage=显示前一个用法
+@1 (@2)=@1 (@2)
 Give me:=给予：
+This recipe is too@@large to be displayed.=该配方太@@大，不能显示。
 To craft grid:=填充物品到合成表
 All=全部
+Crafting=合成
 White=白
 Yellow=黄
 Red=红
@@ -60,10 +76,10 @@ Waypoints=航路点
 Select Waypoint #@1=查询航路点 #@1
 Waypoint @1=航路点 @1
 Set waypoint to current location=将航路点设置到当前位置
-invisible=不可见的
-visible=可见的
-Make waypoint @1=设置航路点 @1
-@1 display of waypoint coordinates=显示航路点@1坐标
+Hide waypoint=隐藏航路点
+Show waypoint=显示航路点
+Hide coordinates=隐藏坐标
+Show coordinates=显示坐标
 Change color of waypoint display=改变航路点显示的颜色
 Edit waypoint name=编辑航路点名称
 Waypoint active=航路点已激活
@@ -73,7 +89,10 @@ World position=世界位置
 Name=名称
 HUD text color=HUD文本颜色
 
-Reset search and display everything=重置搜索并显示所有物品
 
-Any item belonging to the @1 group=属于@1组的任何项目
-Any item belonging to the groups @1=属于组@1的任何项目
+##### not used anymore #####
+
+invisible=不可见的
+visible=可见的
+Make waypoint @1=设置航路点 @1
+@1 display of waypoint coordinates=显示航路点@1坐标

locale/unified_inventory.zh_TW.tr

@@ -1,8 +1,4 @@
 # textdomain: unified_inventory
-# traslation by: IFRFSX(BingFengFSX)
-#Email: IFRFSX@Protonmail.com
-
-Crafting=合成
 Mixing=混合
 Cooking=烹飪
 Digging=挖出
@@ -11,20 +7,32 @@ Bag @1=揹包@1
 Small Bag=小揹包
 Medium Bag=中揹包
 Large Bag=大揹包
+All Items=所有物品
+Misc. Items=雜項
+Plant Life=植物
+Building Materials=建材
+Tools=工具
+Minerals and Metals=礦物與金屬
+Environment and Worldgen=自然環境
+Lighting=光源
  and = 和 
+Scroll categories left=向左滾動分類欄
+Scroll categories right=向右滾動分類欄
+Search=搜索
+Reset search and display everything=重置搜索並顯示所有物品
 First page=第一頁
 Back three pages=後退三頁
 Back one page=後退一頁
 Forward one page=前進一頁
 Forward three pages=前進三頁
 Last page=最後一頁
-Search=搜索
 No matching items=沒有匹配物品
 No matches.=沒有匹配
 Page=頁面
 @1 of @2=第@1頁，共@2頁
 Filter=過濾器
 Can use the creative inventory=可以使用創造揹包
+Forces Unified Inventory to be displayed in Full mode if Lite mode is configured globally=如果輕量模式被全局配置，強迫Unified Inventory以完全模式展現。
 Crafting Grid=合成表
 Crafting Guide=合成指南
 Set home position=設置家的位置
@@ -36,21 +44,29 @@ Time of day set to 6am=時間設置到早晨6點
 You don't have the settime privilege!=你沒有“settime”權限！
 Set time to night=設置時間到晚上
 Time of day set to 9pm=時間設置到晚上9點
-
-Inventory cleared!=清空揹包
 Clear inventory=清空揹包
-
+This button has been disabled outside of creative mode to prevent accidental inventory trashing.@nUse the trash slot instead.=此按鈕已在非創造模式中禁用以防止意外的背包清空。@n請使用垃圾桶欄。
+Inventory cleared!=清空揹包
 Trash:=丟棄：
 Refill:=填滿：
+Any item belonging to the @1 group=屬於@1組的任何項目
+Any item belonging to the groups @1=屬於組@1的任何項目
 Recipe @1 of @2=第@1配方，共@2個
 Usage @1 of @2=第@1用法，共@2個
 No recipes=沒有配方
 No usages=沒有用法
 Result=結果
 Ingredient=原料
+Show next recipe=顯示下一個配方
+Show next usage=顯示下一個用法
+Show previous recipe=顯示上一個配方
+Show previous usage=顯示上一個用法
+@1 (@2)=@1 (@2)
 Give me:=給予：
+This recipe is too@@large to be displayed.=該配方太@@大，不能顯示。
 To craft grid:=填充物品到合成表
 All=全部
+Crafting=合成
 White=白
 Yellow=黃
 Red=紅
@@ -60,10 +76,10 @@ Waypoints=航路點
 Select Waypoint #@1=查詢航路點 #@1
 Waypoint @1=航路點 @1
 Set waypoint to current location=將航路點設置到當前位置
-invisible=不可見的
-visible=可見的
-Make waypoint @1=設置航路點 @1
-@1 display of waypoint coordinates=顯示航路點@1座標
+Hide waypoint=隱藏航路點
+Show waypoint=顯示航路點
+Hide coordinates=隱藏坐標
+Show coordinates=顯示坐標
 Change color of waypoint display=改變航路點顯示的顏色
 Edit waypoint name=編輯航路點名稱
 Waypoint active=航路點已激活
@@ -73,7 +89,10 @@ World position=世界位置
 Name=名稱
 HUD text color=HUD文本顏色
 
-Reset search and display everything=重置搜索並顯示所有物品
 
-Any item belonging to the @1 group=屬於@1組的任何項目
-Any item belonging to the groups @1=屬於組@1的任何項目
+##### not used anymore #####
+
+invisible=不可見的
+visible=可見的
+Make waypoint @1=設置航路點 @1
+@1 display of waypoint coordinates=顯示航路點@1座標

match_craft.lua

@@ -126,25 +126,18 @@ Example output:
 	}
 --]]
 function unified_inventory.find_usable_items(inv_items, craft_items)
-	local get_group = minetest.get_item_group
 	local result = {}
 
 	for craft_item in pairs(craft_items) do
-		local group = craft_item:match("^group:(.+)")
-		local found = {}
+		-- may specify group:type1,type2
+		local items = unified_inventory.get_matching_items(craft_item)
 
-		if group ~= nil then
-			for inv_item in pairs(inv_items) do
-				if get_group(inv_item, group) > 0 then
-					found[inv_item] = true
-				end
-			end
-		else
-			if inv_items[craft_item] ~= nil then
-				found[craft_item] = true
+		local found = {}
+		for itemname, _ in pairs(items) do
+			if inv_items[itemname] then
+				found[itemname] = true
 			end
 		end
-
 		result[craft_item] = found
 	end
 

mod.conf

@@ -1,7 +1,8 @@
 name = unified_inventory
-depends = default
-optional_depends = creative, sfinv, datastorage, farming
+
+optional_depends = default, creative, sfinv, datastorage
 description = """
 Unified Inventory replaces the default survival and creative inventory.
 It adds a nicer interface and a number of features, such as a crafting guide.
 """
+min_minetest_version = 5.4.0

register.lua

@@ -1,6 +1,7 @@
 local S = minetest.get_translator("unified_inventory")
 local NS = function(s) return s end
 local F = minetest.formspec_escape
+local ui = unified_inventory
 
 minetest.register_privilege("creative", {
 	description = S("Can use the creative inventory"),
@@ -12,10 +13,9 @@ minetest.register_privilege("ui_full", {
 	give_to_singleplayer = false,
 })
 
-
 local trash = minetest.create_detached_inventory("trash", {
 	--allow_put = function(inv, listname, index, stack, player)
-	--	if unified_inventory.is_creative(player:get_player_name()) then
+	--	if ui.is_creative(player:get_player_name()) then
 	--		return stack:get_count()
 	--	else
 	--		return 0
@@ -29,19 +29,19 @@ local trash = minetest.create_detached_inventory("trash", {
 })
 trash:set_size("main", 1)
 
-unified_inventory.register_button("craft", {
+ui.register_button("craft", {
 	type = "image",
 	image = "ui_craft_icon.png",
 	tooltip = S("Crafting Grid")
 })
 
-unified_inventory.register_button("craftguide", {
+ui.register_button("craftguide", {
 	type = "image",
 	image = "ui_craftguide_icon.png",
 	tooltip = S("Crafting Guide")
 })
 
-unified_inventory.register_button("home_gui_set", {
+ui.register_button("home_gui_set", {
 	type = "image",
 	image = "ui_sethome_icon.png",
 	tooltip = S("Set home position"),
@@ -49,8 +49,8 @@ unified_inventory.register_button("home_gui_set", {
 	action = function(player)
 		local player_name = player:get_player_name()
 		if minetest.check_player_privs(player_name, {home=true}) then
-			unified_inventory.set_home(player, player:get_pos())
-			local home = unified_inventory.home_pos[player_name]
+			ui.set_home(player, player:get_pos())
+			local home = ui.home_pos[player_name]
 			if home ~= nil then
 				minetest.sound_play("dingdong",
 						{to_player=player_name, gain = 1.0})
@@ -60,7 +60,7 @@ unified_inventory.register_button("home_gui_set", {
 		else
 			minetest.chat_send_player(player_name,
 				S("You don't have the \"home\" privilege!"))
-			unified_inventory.set_inventory_formspec(player, unified_inventory.current_page[player_name])
+			ui.set_inventory_formspec(player, ui.current_page[player_name])
 		end
 	end,
 	condition = function(player)
@@ -68,7 +68,7 @@ unified_inventory.register_button("home_gui_set", {
 	end,
 })
 
-unified_inventory.register_button("home_gui_go", {
+ui.register_button("home_gui_go", {
 	type = "image",
 	image = "ui_gohome_icon.png",
 	tooltip = S("Go home"),
@@ -76,13 +76,13 @@ unified_inventory.register_button("home_gui_go", {
 	action = function(player)
 		local player_name = player:get_player_name()
 		if minetest.check_player_privs(player_name, {home=true}) then
-			if unified_inventory.go_home(player) then
+			if ui.go_home(player) then
 				minetest.sound_play("teleport", {to_player = player_name})
 			end
 		else
 			minetest.chat_send_player(player_name,
 				S("You don't have the \"home\" privilege!"))
-			unified_inventory.set_inventory_formspec(player, unified_inventory.current_page[player_name])
+			ui.set_inventory_formspec(player, ui.current_page[player_name])
 		end
 	end,
 	condition = function(player)
@@ -90,7 +90,7 @@ unified_inventory.register_button("home_gui_go", {
 	end,
 })
 
-unified_inventory.register_button("misc_set_day", {
+ui.register_button("misc_set_day", {
 	type = "image",
 	image = "ui_sun_icon.png",
 	tooltip = S("Set time to day"),
@@ -98,7 +98,7 @@ unified_inventory.register_button("misc_set_day", {
 	action = function(player)
 		local player_name = player:get_player_name()
 		if minetest.check_player_privs(player_name, {settime=true}) then
-			minetest.sound_play("birds",
+			minetest.sound_play("ui_morning",
 					{to_player=player_name, gain = 1.0})
 			minetest.set_timeofday((6000 % 24000) / 24000)
 			minetest.chat_send_player(player_name,
@@ -106,7 +106,7 @@ unified_inventory.register_button("misc_set_day", {
 		else
 			minetest.chat_send_player(player_name,
 				S("You don't have the settime privilege!"))
-			unified_inventory.set_inventory_formspec(player, unified_inventory.current_page[player_name])
+			ui.set_inventory_formspec(player, ui.current_page[player_name])
 		end
 	end,
 	condition = function(player)
@@ -114,7 +114,7 @@ unified_inventory.register_button("misc_set_day", {
 	end,
 })
 
-unified_inventory.register_button("misc_set_night", {
+ui.register_button("misc_set_night", {
 	type = "image",
 	image = "ui_moon_icon.png",
 	tooltip = S("Set time to night"),
@@ -122,7 +122,7 @@ unified_inventory.register_button("misc_set_night", {
 	action = function(player)
 		local player_name = player:get_player_name()
 		if minetest.check_player_privs(player_name, {settime=true}) then
-			minetest.sound_play("owl",
+			minetest.sound_play("ui_owl",
 					{to_player=player_name, gain = 1.0})
 			minetest.set_timeofday((21000 % 24000) / 24000)
 			minetest.chat_send_player(player_name,
@@ -130,7 +130,7 @@ unified_inventory.register_button("misc_set_night", {
 		else
 			minetest.chat_send_player(player_name,
 					S("You don't have the settime privilege!"))
-			unified_inventory.set_inventory_formspec(player, unified_inventory.current_page[player_name])
+			ui.set_inventory_formspec(player, ui.current_page[player_name])
 		end
 	end,
 	condition = function(player)
@@ -138,19 +138,19 @@ unified_inventory.register_button("misc_set_night", {
 	end,
 })
 
-unified_inventory.register_button("clear_inv", {
+ui.register_button("clear_inv", {
 	type = "image",
 	image = "ui_trash_icon.png",
 	tooltip = S("Clear inventory"),
 	action = function(player)
 		local player_name = player:get_player_name()
-		if not unified_inventory.is_creative(player_name) then
+		if not ui.is_creative(player_name) then
 			minetest.chat_send_player(player_name,
 					S("This button has been disabled outside"
 					.." of creative mode to prevent"
 					.." accidental inventory trashing."
 					.."\nUse the trash slot instead."))
-			unified_inventory.set_inventory_formspec(player, unified_inventory.current_page[player_name])
+			ui.set_inventory_formspec(player, ui.current_page[player_name])
 			return
 		end
 		player:get_inventory():set_list("main", {})
@@ -159,35 +159,42 @@ unified_inventory.register_button("clear_inv", {
 				{to_player=player_name, gain = 1.0})
 	end,
 	condition = function(player)
-		return unified_inventory.is_creative(player:get_player_name())
+		return ui.is_creative(player:get_player_name())
 	end,
 })
 
-unified_inventory.register_page("craft", {
+ui.register_page("craft", {
 	get_formspec = function(player, perplayer_formspec)
 
-		local formspecy = perplayer_formspec.formspec_y
-		local formheadery =  perplayer_formspec.form_header_y
+		local formheaderx = perplayer_formspec.form_header_x
+		local formheadery = perplayer_formspec.form_header_y
+		local craftx = perplayer_formspec.craft_x
+		local crafty = perplayer_formspec.craft_y
 
 		local player_name = player:get_player_name()
-		local formspec = "background[2,"..formspecy..";6,3;ui_crafting_form.png]"
-		formspec = formspec..string.gsub(unified_inventory.standard_inv_bg, "YYY", (formspecy + 3.4))
-		formspec = formspec.."label[0,"..formheadery..";" ..F(S("Crafting")).."]"
-		formspec = formspec.."listcolors[#00000000;#00000000]"
-		formspec = formspec.."list[current_player;craftpreview;6,"..formspecy..";1,1;]"
-		formspec = formspec.."list[current_player;craft;2,"..formspecy..";3,3;]"
-		if unified_inventory.trash_enabled or unified_inventory.is_creative(player_name) or minetest.get_player_privs(player_name).give then
-			formspec = formspec.."label[7,"..(formspecy + 1.5)..";" .. F(S("Trash:")) .. "]"
-			formspec = formspec.."background[7,"..(formspecy + 2)..";1,1;ui_single_slot.png]"
-			formspec = formspec.."list[detached:trash;main;7,"..(formspecy + 2)..";1,1;]"
+		local formspec = {
+			perplayer_formspec.standard_inv_bg,
+			perplayer_formspec.craft_grid,
+			"label["..formheaderx..","..formheadery..";" ..F(S("Crafting")).."]",
+			"listcolors[#00000000;#00000000]",
+			"listring[current_name;craft]",
+			"listring[current_player;main]"
+		}
+		local n=#formspec+1
+
+		if ui.trash_enabled or ui.is_creative(player_name) or minetest.get_player_privs(player_name).give then
+			formspec[n] = string.format("label[%f,%f;%s]", craftx + 6.35, crafty + 2.3, F(S("Trash:")))
+			formspec[n+1] = ui.make_trash_slot(craftx + 6.25, crafty + 2.5)
+			n=n + 2
 		end
-		formspec = formspec.."listring[current_name;craft]"
-		formspec = formspec.."listring[current_player;main]"
-		if unified_inventory.is_creative(player_name) then
-			formspec = formspec.."label[0,"..(formspecy + 1.5)..";" .. F(S("Refill:")) .. "]"
-			formspec = formspec.."list[detached:"..F(player_name).."refill;main;0,"..(formspecy +2)..";1,1;]"
+
+		if ui.is_creative(player_name) then
+			formspec[n] = ui.single_slot(craftx - 2.5, crafty + 2.5)
+			formspec[n+1] = string.format("label[%f,%f;%s]", craftx - 2.4, crafty + 2.3, F(S("Refill:")))
+			formspec[n+2] = string.format("list[detached:%srefill;main;%f,%f;1,1;]",
+				F(player_name), craftx - 2.5 + ui.list_img_offset, crafty + 2.5 + ui.list_img_offset)
 		end
-		return {formspec=formspec}
+		return {formspec=table.concat(formspec)}
 	end,
 })
 
@@ -200,24 +207,26 @@ unified_inventory.register_page("craft", {
 
 local function stack_image_button(x, y, w, h, buttonname_prefix, item)
 	local name = item:get_name()
-	local count = item:get_count()
+	local description = item:get_meta():get_string("description")
 	local show_is_group = false
-	local displayitem = name.." "..count
+	local displayitem = item:to_string()
 	local selectitem = name
 	if name:sub(1, 6) == "group:" then
 		local group_name = name:sub(7)
-		local group_item = unified_inventory.get_group_item(group_name)
+		local group_item = ui.get_group_item(group_name)
 		show_is_group = not group_item.sole
-		displayitem = group_item.item or "unknown"
+		displayitem = group_item.item or name
 		selectitem = group_item.sole and displayitem or name
 	end
 	local label = show_is_group and "G" or ""
-	local buttonname = F(buttonname_prefix..unified_inventory.mangle_for_formspec(selectitem))
+	-- Unique id to prevent tooltip being overridden
+	local id = string.format("%i%i_", x*10, y*10)
+	local buttonname = F(id..buttonname_prefix..ui.mangle_for_formspec(selectitem))
 	local button = string.format("item_image_button[%f,%f;%f,%f;%s;%s;%s]",
 			x, y, w, h,
 			F(displayitem), buttonname, label)
 	if show_is_group then
-		local groupstring, andcount = unified_inventory.extract_groupnames(name)
+		local groupstring, andcount = ui.extract_groupnames(name)
 		local grouptip
 		if andcount == 1 then
 			grouptip = S("Any item belonging to the @1 group", groupstring)
@@ -228,10 +237,15 @@ local function stack_image_button(x, y, w, h, buttonname_prefix, item)
 		if andcount >= 1 then
 			button = button  .. string.format("tooltip[%s;%s]", buttonname, grouptip)
 		end
+	elseif description ~= "" then
+		button = button  .. string.format("tooltip[%s;%s]", buttonname, F(description))
 	end
 	return button
 end
 
+-- The recipe text contains parameters, hence they can yet not be translated.
+-- Instead, use a dummy translation call so that it can be picked up by the
+-- static parsing of the translation string update script
 local recipe_text = {
 	recipe = NS("Recipe @1 of @2"),
 	usage = NS("Usage @1 of @2"),
@@ -257,80 +271,97 @@ local other_dir = {
 	usage = "recipe",
 }
 
-unified_inventory.register_page("craftguide", {
+ui.register_page("craftguide", {
 	get_formspec = function(player, perplayer_formspec)
 
-		local formspecy =    perplayer_formspec.formspec_y
-		local formheadery =  perplayer_formspec.form_header_y
-		local craftresultx = perplayer_formspec.craft_result_x
-		local craftresulty = perplayer_formspec.craft_result_y
+		local craftguidex =       perplayer_formspec.craft_guide_x
+		local craftguidey =       perplayer_formspec.craft_guide_y
+		local craftguidearrowx =  perplayer_formspec.craft_guide_arrow_x
+		local craftguideresultx = perplayer_formspec.craft_guide_result_x
+		local formheaderx =       perplayer_formspec.form_header_x
+		local formheadery =       perplayer_formspec.form_header_y
+		local give_x =            perplayer_formspec.give_btn_x
 
 		local player_name = player:get_player_name()
 		local player_privs = minetest.get_player_privs(player_name)
-		local fs = {
-			string.gsub(unified_inventory.standard_inv_bg, "YYY", (formspecy + 3.4)),
-			"label[0,"..formheadery..";" .. F(S("Crafting Guide")) .. "]",
+
+		local formspec = {
+			perplayer_formspec.standard_inv_bg,
+			"label["..formheaderx..","..formheadery..";" .. F(S("Crafting Guide")) .. "]",
 			"listcolors[#00000000;#00000000]"
 		}
-		local item_name = unified_inventory.current_item[player_name]
+
+		local item_name = ui.current_item[player_name]
 		if not item_name then
-			return { formspec = table.concat(fs) }
+			return { formspec = table.concat(formspec) }
 		end
 
+		local n = 4
+
+		local item_def = minetest.registered_items[item_name]
 		local item_name_shown
-		if minetest.registered_items[item_name]
-				and minetest.registered_items[item_name].description then
-			item_name_shown = S("@1 (@2)",
-				minetest.registered_items[item_name].description, item_name)
+		if item_def and item_def.description then
+			item_name_shown = S("@1 (@2)", item_def.description, item_name)
 		else
 			item_name_shown = item_name
 		end
 
-		local dir = unified_inventory.current_craft_direction[player_name]
+		local dir = ui.current_craft_direction[player_name]
 		local rdir = dir == "recipe" and "usage" or "recipe"
 
-		local crafts = unified_inventory.crafts_for[dir][item_name]
-		local alternate = unified_inventory.alternate[player_name]
+		local crafts = ui.crafts_for[dir][item_name]
+		local alternate = ui.alternate[player_name]
 		local alternates, craft
 		if crafts and #crafts > 0 then
 			alternates = #crafts
 			craft = crafts[alternate]
 		end
-		local has_give = player_privs.give or unified_inventory.is_creative(player_name)
+		local has_give = player_privs.give or ui.is_creative(player_name)
 
-		fs[#fs + 1] = "background[0.5,"..(formspecy + 0.2)..";8,3;ui_craftguide_form.png]"
-		fs[#fs + 1] = string.format("textarea[%f,%f;10,1;;%s: %s;]",
-				craftresultx, craftresulty, F(role_text[dir]), item_name_shown)
-		fs[#fs + 1] = stack_image_button(0, formspecy, 1.1, 1.1,
-				"item_button_" .. rdir .. "_", ItemStack(item_name))
+		formspec[n] = string.format("image[%f,%f;%f,%f;ui_crafting_arrow.png]",
+	                            craftguidearrowx, craftguidey, ui.imgscale, ui.imgscale)
+
+		formspec[n+1] = string.format("textarea[%f,%f;10,1;;%s: %s;]",
+				perplayer_formspec.craft_guide_resultstr_x, perplayer_formspec.craft_guide_resultstr_y,
+				F(role_text[dir]), item_name_shown)
+		n = n + 2
+
+		local giveme_form =
+			"label[" .. (give_x + 0.1) .. "," .. (craftguidey + 2.7) .. ";" .. F(S("Give me:")) .. "]" ..
+			"button[" .. (give_x) .. "," .. (craftguidey + 2.9) .. ";0.75,0.5;craftguide_giveme_1;1]"
+		if item_def and item_def.type ~= "tool" then
+			giveme_form = giveme_form ..
+				"button[" .. (give_x + 0.8) .. "," .. (craftguidey + 2.9) .. ";0.75,0.5;craftguide_giveme_10;10]" ..
+				"button[" .. (give_x + 1.6) .. "," .. (craftguidey + 2.9) .. ";0.75,0.5;craftguide_giveme_99;99]"
+		end
 
 		if not craft then
 			-- No craft recipes available for this item.
-			fs[#fs + 1] = "label[5.5,"..(formspecy + 2.35)..";"
-					.. F(no_recipe_text[dir]) .. "]"
-			local no_pos = dir == "recipe" and 4.5 or 6.5
-			local item_pos = dir == "recipe" and 6.5 or 4.5
-			fs[#fs + 1] = "image["..no_pos..","..formspecy..";1.1,1.1;ui_no.png]"
-			fs[#fs + 1] = stack_image_button(item_pos, formspecy, 1.1, 1.1,
+			formspec[n] = string.format("label[%f,%f;%s]", craftguidex+2.5, craftguidey+1.5, F(no_recipe_text[dir]))
+			local no_pos = dir == "recipe" and (craftguidex+2.5) or craftguideresultx
+			local item_pos = dir == "recipe" and craftguideresultx or (craftguidex+2.5)
+			formspec[n+1] = "image["..no_pos..","..craftguidey..";1.2,1.2;ui_no.png]"
+			formspec[n+2] = stack_image_button(item_pos, craftguidey, 1.2, 1.2,
 				"item_button_" .. other_dir[dir] .. "_", ItemStack(item_name))
 			if has_give then
-				fs[#fs + 1] = "label[0," .. (formspecy + 2.10) .. ";" .. F(S("Give me:")) .. "]"
-						.. "button[0,  " .. (formspecy + 2.7) .. ";0.6,0.5;craftguide_giveme_1;1]"
-						.. "button[0.6," .. (formspecy + 2.7) .. ";0.7,0.5;craftguide_giveme_10;10]"
-						.. "button[1.3," .. (formspecy + 2.7) .. ";0.8,0.5;craftguide_giveme_99;99]"
+				formspec[n+3] = giveme_form
 			end
-			return { formspec = table.concat(fs) }
+			return { formspec = table.concat(formspec) }
+		else
+			formspec[n] = stack_image_button(craftguideresultx, craftguidey, 1.2, 1.2,
+					"item_button_" .. rdir .. "_", ItemStack(craft.output))
+			n = n + 1
 		end
 
-		local craft_type = unified_inventory.registered_craft_types[craft.type] or
-				unified_inventory.craft_type_defaults(craft.type, {})
+		local craft_type = ui.registered_craft_types[craft.type] or
+				ui.craft_type_defaults(craft.type, {})
 		if craft_type.icon then
-			fs[#fs + 1] = string.format("image[%f,%f;%f,%f;%s]",
-					5.7, (formspecy + 0.05), 0.5, 0.5, craft_type.icon)
+			formspec[n] = string.format("image[%f,%f;%f,%f;%s]",
+					craftguidearrowx+0.35, craftguidey, 0.5, 0.5, craft_type.icon)
+			n = n + 1
 		end
-		fs[#fs + 1] = "label[5.5,"..(formspecy + 1)..";" .. F(craft_type.description).."]"
-		fs[#fs + 1] = stack_image_button(6.5, formspecy, 1.1, 1.1,
-				"item_button_usage_", ItemStack(craft.output))
+		formspec[n] = string.format("label[%f,%f;%s]", craftguidearrowx + 0.15, craftguidey + 1.4, F(craft_type.description))
+		n = n + 1
 
 		local display_size = craft_type.dynamic_display_size
 				and craft_type.dynamic_display_size(craft)
@@ -341,11 +372,12 @@ unified_inventory.register_page("craftguide", {
 
 		-- This keeps recipes aligned to the right,
 		-- so that they're close to the arrow.
-		local xoffset = 5.5
+		local xoffset = craftguidex+3.75
+		local bspc = 1.25
 		-- Offset factor for crafting grids with side length > 4
 		local of = (3/math.max(3, math.max(display_size.width, display_size.height)))
 		local od = 0
-		-- Minimum grid size at which size optimazation measures kick in
+		-- Minimum grid size at which size optimization measures kick in
 		local mini_craft_size = 6
 		if display_size.width >= mini_craft_size then
 			od = math.max(1, display_size.width - 2)
@@ -354,12 +386,12 @@ unified_inventory.register_page("craftguide", {
 		-- Size modifier factor
 		local sf = math.min(1, of * (1.05 + 0.05*od))
 		-- Button size
-		local bsize_h = 1.1 * sf
-		local bsize_w = bsize_h
-		if display_size.width >= mini_craft_size then
-			bsize_w = 1.175 * sf
+		local bsize = 1.2 * sf
+
+		if display_size.width >= mini_craft_size then  -- it's not a normal 3x3 grid
+			bsize = 0.8 * sf
 		end
-		if (bsize_h > 0.35 and display_size.width) then
+		if (bsize > 0.35 and display_size.width) then
 		for y = 1, display_size.height do
 		for x = 1, display_size.width do
 			local item
@@ -369,48 +401,53 @@ unified_inventory.register_page("craftguide", {
 			-- Flipped x, used to build formspec buttons from right to left
 			local fx = display_size.width - (x-1)
 			-- x offset, y offset
-			local xof = (fx-1) * of + of
-			local yof = (y-1) * of + 1
+			local xof = ((fx-1) * of + of) * bspc
+			local yof = ((y-1) * of + 1) * bspc
 			if item then
-				fs[#fs + 1] = stack_image_button(
-						xoffset - xof, formspecy - 1 + yof, bsize_w, bsize_h,
+				formspec[n] = stack_image_button(
+						xoffset - xof, craftguidey - 1.25 + yof, bsize, bsize,
 						"item_button_recipe_",
 						ItemStack(item))
 			else
 				-- Fake buttons just to make grid
-				fs[#fs + 1] = string.format("image_button[%f,%f;%f,%f;ui_blank_image.png;;]",
-						xoffset - xof, formspecy - 1 + yof, bsize_w, bsize_h)
+				formspec[n] = string.format("image_button[%f,%f;%f,%f;ui_blank_image.png;;]",
+						xoffset - xof, craftguidey - 1.25 + yof, bsize, bsize)
 			end
+			n = n + 1
 		end
 		end
 		else
 			-- Error
-			fs[#fs + 1] = string.format("label[2,%f;%s]",
-				formspecy, F(S("This recipe is too@nlarge to be displayed.")))
+			formspec[n] = string.format("label[2,%f;%s]",
+				craftguidey, F(S("This recipe is too@nlarge to be displayed.")))
+			n = n + 1
 		end
 
 		if craft_type.uses_crafting_grid and display_size.width <= 3 then
-			fs[#fs + 1] = "label[0," .. (formspecy + 0.9) .. ";" .. F(S("To craft grid:")) .. "]"
-					.. "button[0,  " .. (formspecy + 1.5) .. ";0.6,0.5;craftguide_craft_1;1]"
-					.. "button[0.6," .. (formspecy + 1.5) .. ";0.7,0.5;craftguide_craft_10;10]"
-					.. "button[1.3," .. (formspecy + 1.5) .. ";0.8,0.5;craftguide_craft_max;" .. F(S("All")) .. "]"
+			formspec[n]   = "label["..(give_x+0.1)..","..    (craftguidey + 1.7) .. ";" .. F(S("To craft grid:")) .. "]"
+			formspec[n+1] = "button["..  (give_x)..","..     (craftguidey + 1.9) .. ";0.75,0.5;craftguide_craft_1;1]"
+			formspec[n+2] = "button["..  (give_x+0.8)..",".. (craftguidey + 1.9) .. ";0.75,0.5;craftguide_craft_10;10]"
+			formspec[n+3] = "button["..  (give_x+1.6)..",".. (craftguidey + 1.9) .. ";0.75,0.5;craftguide_craft_max;" .. F(S("All")) .. "]"
+			n = n + 4
 		end
+
 		if has_give then
-			fs[#fs + 1] = "label[0," .. (formspecy + 2.1) .. ";" .. F(S("Give me:")) .. "]"
-					.. "button[0,  " .. (formspecy + 2.7) .. ";0.6,0.5;craftguide_giveme_1;1]"
-					.. "button[0.6," .. (formspecy + 2.7) .. ";0.7,0.5;craftguide_giveme_10;10]"
-					.. "button[1.3," .. (formspecy + 2.7) .. ";0.8,0.5;craftguide_giveme_99;99]"
+			formspec[n] = giveme_form
+			n = n + 1
 		end
 
 		if alternates and alternates > 1 then
-			fs[#fs + 1] = "label[5.5," .. (formspecy + 1.6) .. ";"
-					.. F(S(recipe_text[dir], alternate, alternates)) .. "]"
-					.. "image_button[5.5," .. (formspecy + 2) .. ";1,1;ui_left_icon.png;alternate_prev;]"
-					.. "image_button[6.5," .. (formspecy + 2) .. ";1,1;ui_right_icon.png;alternate;]"
-					.. "tooltip[alternate_prev;" .. F(prev_alt_text[dir]) .. "]"
-					.. "tooltip[alternate;" .. F(next_alt_text[dir]) .. "]"
+			formspec[n] = string.format("label[%f,%f;%s]",
+						craftguidex+4, craftguidey + 2.3, F(S(recipe_text[dir], alternate, alternates)))
+			formspec[n+1] = string.format("image_button[%f,%f;1.1,1.1;ui_left_icon.png;alternate_prev;]",
+						craftguidearrowx+0.2, craftguidey + 2.6)
+			formspec[n+2] = string.format("image_button[%f,%f;1.1,1.1;ui_right_icon.png;alternate;]",
+						craftguidearrowx+1.35, craftguidey + 2.6)
+			formspec[n+3] = "tooltip[alternate_prev;" .. F(prev_alt_text[dir]) .. "]"
+			formspec[n+4] = "tooltip[alternate;" .. F(next_alt_text[dir]) .. "]"
 		end
-		return { formspec = table.concat(fs) }
+
+		return { formspec = table.concat(formspec) }
 	end,
 })
 
@@ -418,7 +455,7 @@ local function craftguide_giveme(player, formname, fields)
 	local player_name = player:get_player_name()
 	local player_privs = minetest.get_player_privs(player_name)
 	if not player_privs.give and
-			not unified_inventory.is_creative(player_name) then
+			not ui.is_creative(player_name) then
 		minetest.log("action", "[unified_inventory] Denied give action to player " ..
 			player_name)
 		return
@@ -433,7 +470,7 @@ local function craftguide_giveme(player, formname, fields)
 	amount = tonumber(amount) or 0
 	if amount == 0 then return end
 
-	local output = unified_inventory.current_item[player_name]
+	local output = ui.current_item[player_name]
 	if (not output) or (output == "") then return end
 
 	local player_inv = player:get_inventory()
@@ -454,21 +491,29 @@ local function craftguide_craft(player, formname, fields)
 
 	local player_name = player:get_player_name()
 
-	local output = unified_inventory.current_item[player_name] or ""
+	local output = ui.current_item[player_name] or ""
 	if output == "" then return end
 
-	local crafts = unified_inventory.crafts_for[
-		unified_inventory.current_craft_direction[player_name]][output] or {}
+	local crafts = ui.crafts_for[
+		ui.current_craft_direction[player_name]][output] or {}
 	if #crafts == 0 then return end
 
-	local alternate = unified_inventory.alternate[player_name]
+	local alternate = ui.alternate[player_name]
 
 	local craft = crafts[alternate]
+	if not craft.width then
+		if not craft.output then
+			minetest.log("warning", "[unified_inventory] Craft has no output.")
+		else
+			minetest.log("warning", ("[unified_inventory] Craft for '%s' has no width."):format(craft.output))
+		end
+		return
+	end
 	if craft.width > 3 then return end
 
-	unified_inventory.craftguide_match_craft(player, "main", "craft", craft, amount)
+	ui.craftguide_match_craft(player, "main", "craft", craft, amount)
 
-	unified_inventory.set_inventory_formspec(player, "craft")
+	ui.set_inventory_formspec(player, "craft")
 end
 
 minetest.register_on_player_receive_fields(function(player, formname, fields)

settingtypes.txt

@@ -1,11 +1,36 @@
-#Enabling lite mode enables a smaller and simpler version of the Unified
-#Inventory, optimized for small displays.
+# Reduced formspec layout, optimized for smaller displays.
+# Note: This may also disable some features to free up visual space.
 unified_inventory_lite (Lite mode) bool false
 
-#If enabled, bags will be made available which can be used to extend
-#inventory storage size.
+# Provides craftable bag items to extend the inventory space.
 unified_inventory_bags (Enable bags) bool true
 
-#If enabled, the trash slot can be used by those without both creative
-#and the give privilege.
+# Shows the trash slot to everyone.
+# When disabled, only players with the privilege "creative" or "give" will
+# have this slot shown in their inventory.
 unified_inventory_trash (Enable trash) bool true
+
+# Provides waypoints on a per-player basis to remember positions on the map.
+unified_inventory_waypoints (Enable waypoints) bool true
+
+# If enabled, disabled buttons will be hidden instead of grayed out.
+unified_inventory_hide_disabled_buttons (Hide disabled buttons) bool false
+
+# Hides items with no known craft recipe from the category "all" (default).
+# This setting has no effect on players in creative mode.
+unified_inventory_hide_uncraftable_items (Hide uncraftable items) bool false
+
+# Automatically categorizes registered items based on their
+# groups. This is based on a fuzzy match, thus is not 100% accurate.
+unified_inventory_automatic_categorization (Categories: add items automatically) bool true
+
+# Shows the selected wielded item description in the HUD for a few seconds.
+unified_inventory_item_names (Enable HUD item names) bool true
+
+# Trims the shown wielded item description to the first line.
+unified_inventory_only_names (HUD item name: first line only) bool true
+
+# Hard character limit of the wielded item description.
+# Crops the shown description to the specified length.
+# 0 disables this functionality.
+unified_inventory_max_item_name_length (HUD item names: character limit) int 80

waypoints.lua

@@ -1,5 +1,7 @@
 local S = minetest.get_translator("unified_inventory")
 local F = minetest.formspec_escape
+local ui = unified_inventory
+local COUNT = 5
 
 local hud_colors = {
 	{"#FFFFFF", 0xFFFFFF, S("White")},
@@ -9,118 +11,231 @@ local hud_colors = {
 	{"#2c4df1", 0x2c4df1, S("Blue")},
 }
 
-local hud_colors_max = #hud_colors
+-- Storage compatibility code
 
--- Stores temporary player data (persists until player leaves)
+--[[
+Stores temporary player data (persists until player leaves)
+	[player_name] = {
+		[<waypoint index>] = {
+			edit = <edit current waypoint?>,
+			hud = <hud ID>,
+		},
+		[<waypoint index>] = { ... },
+		...
+	}
+]]
 local waypoints_temp = {}
 
-unified_inventory.register_page("waypoints", {
-	get_formspec = function(player)
-		local player_name = player:get_player_name()
+--[[
+Datastorage format (per-player):
+	{
+		selected = <waypoint index>,
+		[<waypoint index>] = {
+			name = <name or nil>
+			world_pos = <coordinates vector>,
+			color = <"hud_colors" index>,
+			active = <hud show waypoint?>,
+			display_pos = <hud display coorinates?>,
+		},
+		[<waypoint index>] = { ... },
+		...
+	}
+Player metadata format:
+	{
+		selected = <selected number>,
+		-- Cannot mix integer/string keys in JSON
+		data = {
+			[<waypoint index>] = { same as above },
+			...
+		}
+	}
+]]
 
-		-- build a "fake" temp entry if the server took too long
-		-- during sign-on and returned an empty entry
-		if not waypoints_temp[player_name] then waypoints_temp[player_name] = {hud = 1} end
+local function set_waypoint_data(player, waypoints)
+	local meta = player:get_meta()
+	if not next(waypoints.data or {}) then
+		-- Empty data. Do not save anything, or delete
+		meta:set_string("ui_waypoints", "")
+	else
+		meta:set_string("ui_waypoints", minetest.write_json(waypoints))
+	end
+end
 
+local function migrate_datastorage(player, waypoints)
+	-- Copy values from old table
+	local new_data = {
+		selected = waypoints.selected,
+		data = {}
+	}
+	for i = 1, COUNT do
+		new_data.data[i] = waypoints[i]
+	end
+
+	set_waypoint_data(player, new_data)
+
+	-- Delete values, but keep one entry so that it's saved by datastorage
+	for k, _ in pairs(waypoints) do
+		waypoints[k] = nil
+	end
+	waypoints[1] = 1
+end
+
+local have_datastorage = minetest.get_modpath("datastorage") ~= nil
+local function get_waypoint_data(player)
+	local player_name = player:get_player_name()
+
+	-- Migration step
+	if have_datastorage then
 		local waypoints = datastorage.get(player_name, "waypoints")
-		local formspec = string.gsub(unified_inventory.standard_inv_bg, "YYY", "4.4") ..
-			"image[0,0;1,1;ui_waypoints_icon.png]" ..
-			"label[1,0;" .. F(S("Waypoints")) .. "]"
+		if waypoints.selected then
+			migrate_datastorage(player, waypoints)
+			minetest.log("action", "[unified_inventory] " ..
+				"Migrated waypoints of player: " .. player_name)
+		end
+	end
+
+	-- Get directly from metadata
+	local waypoints = player:get_meta():get("ui_waypoints")
+	waypoints = waypoints and minetest.parse_json(waypoints) or {}
+	waypoints.data = waypoints.data or {}
+
+	return waypoints
+end
+
+ui.register_page("waypoints", {
+	get_formspec = function(player, perplayer_formspec)
+		local player_name = player:get_player_name()
+		local wp_info_x = ui.style_full.form_header_x + 1.25
+		local wp_info_y = ui.style_full.form_header_y + 0.5
+		local wp_bottom_row = ui.style_full.std_inv_y - 1
+		local wp_buttons_rj = ui.style_full.std_inv_x + 10.1 - ui.style_full.btn_spc
+		local wp_edit_w = ui.style_full.btn_spc * 4 - 0.1
+
+		local waypoints = get_waypoint_data(player)
+		local sel = waypoints.selected or 1
+
+		local formspec = {
+			string.format("label[%f,%f;%s]",
+				ui.style_full.form_header_x, ui.style_full.form_header_y, F(S("Waypoints"))),
+			"image["..wp_info_x..","..wp_info_y..";1,1;ui_waypoints_icon.png]"
+		}
+		local n=3
+
+		if not perplayer_formspec.is_lite_mode then
+			formspec[n] = ui.style_full.standard_inv_bg
+			n = n + 1
+		end
 
 		-- Tabs buttons:
-		for i = 1, 5, 1 do
-			formspec = formspec ..
-				"image_button[0.0," .. 0.2 + i * 0.7 .. ";.8,.8;" ..
-				(i == waypoints.selected and "ui_blue_icon_background.png^" or "") ..
-				"ui_" .. i .. "_icon.png;" ..
-				"select_waypoint" .. i .. ";]" ..
-				"tooltip[select_waypoint" .. i .. ";"
-					.. S("Select Waypoint #@1", i).."]"
+		for i = 1, COUNT do
+			local sw="select_waypoint"..i
+			formspec[n] = string.format("image_button[%f,%f;%f,%f;%sui_%i_icon.png;%s;]",
+				ui.style_full.main_button_x, wp_bottom_row - (5-i) * ui.style_full.btn_spc,
+				ui.style_full.btn_size, ui.style_full.btn_size,
+				(i == sel) and "ui_blue_icon_background.png^" or "",
+				i, sw)
+			formspec[n+1] = "tooltip["..sw..";"..S("Select Waypoint #@1", i).."]"
+			n = n + 2
 		end
 
-		local i = waypoints.selected or 1
-		local waypoint = waypoints[i] or {}
-		local temp = waypoints_temp[player_name][i] or {}
-		local default_name = S("Waypoint @1", i)
+		local waypoint = waypoints.data[sel] or {}
+		local temp = waypoints_temp[player_name][sel] or {}
+		local default_name = S("Waypoint @1", sel)
 
 		-- Main buttons:
-		formspec = formspec ..
-			"image_button[4.5,3.7;.8,.8;"..
-			"ui_waypoint_set_icon.png;"..
-			"set_waypoint"..i..";]"..
-			"tooltip[set_waypoint" .. i .. ";"
-				.. F(S("Set waypoint to current location")).."]"
+		local btnlist = {
+			-- 1. formspec name
+			-- 2. button image
+			-- 3. translation text
+			{
+				"toggle_waypoint",
+				waypoint.active and "ui_on_icon.png" or "ui_off_icon.png",
+				waypoint.active and S("Hide waypoint") or S("Show waypoint")
+			},
+			{
+				"rename_waypoint",
+				"ui_pencil_icon.png",
+				S("Edit waypoint name")
+			},
+			{
+				"set_waypoint",
+				"ui_waypoint_set_icon.png",
+				S("Set waypoint to current location")
+			},
+			{
+				"toggle_display_pos",
+				waypoint.display_pos and "ui_green_icon_background.png^ui_xyz_icon.png" or "ui_red_icon_background.png^ui_xyz_icon.png^(ui_no.png^[transformR90)",
+				waypoint.display_pos and S("Hide coordinates") or S("Show coordinates")
+			},
+			{
+				"toggle_color",
+				"ui_circular_arrows_icon.png",
+				S("Change color of waypoint display")
+			},
+		}
+		if minetest.get_player_privs(player_name).teleport then
+			table.insert(btnlist, {
+				"teleport_waypoint",
+				"ui_teleport.png",
+				S("Teleport to waypoint")
+			})
+		end
 
-		formspec = formspec ..
-			"image_button[5.2,3.7;.8,.8;"..
-			(waypoint.active and "ui_on_icon.png" or "ui_off_icon.png")..";"..
-			"toggle_waypoint"..i..";]"..
-			"tooltip[toggle_waypoint" .. i .. ";"
-				.. F(S("Make waypoint @1",
-					waypoint.active and S("invisible") or S("visible"))).."]"
-
-		formspec = formspec ..
-			"image_button[5.9,3.7;.8,.8;"..
-			(waypoint.display_pos and "ui_green_icon_background.png" or "ui_red_icon_background.png").."^ui_xyz_icon.png;"..
-			"toggle_display_pos" .. i .. ";]"..
-			"tooltip[toggle_display_pos" .. i .. ";"
-				.. F(S("@1 display of waypoint coordinates",
-					waypoint.display_pos and S("Disable") or S("Enable"))) .."]"
-
-		formspec = formspec ..
-			"image_button[6.6,3.7;.8,.8;"..
-			"ui_circular_arrows_icon.png;"..
-			"toggle_color"..i..";]"..
-			"tooltip[toggle_color" .. i .. ";"
-				.. F(S("Change color of waypoint display")).."]"
-
-		formspec = formspec ..
-			"image_button[7.3,3.7;.8,.8;"..
-			"ui_pencil_icon.png;"..
-			"rename_waypoint"..i..";]"..
-			"tooltip[rename_waypoint" .. i .. ";"
-				.. F(S("Edit waypoint name")).."]"
+		for i, def in pairs(btnlist) do
+			formspec[n] = string.format("image_button[%f,%f;%f,%f;%s;%s%i;]",
+				wp_buttons_rj + ui.style_full.btn_spc * (i - #btnlist), wp_bottom_row,
+				ui.style_full.btn_size, ui.style_full.btn_size,
+				def[2], def[1], sel)
+			formspec[n+1] = "tooltip["..def[1]..sel..";"..F(def[3]).."]"
+			n = n + 2
+		end
 
 		-- Waypoint's info:
-		if waypoint.active then
-			formspec = formspec .. 	"label[1,0.8;"..F(S("Waypoint active")).."]"
-		else
-			formspec = formspec .. 	"label[1,0.8;"..F(S("Waypoint inactive")).."]"
-		end
+		formspec[n] = ("label[%f,%f;%s]"):format(
+			wp_info_x, wp_info_y + 1.1,
+			F(waypoint.active and S("Waypoint active") or S("Waypoint inactive"))
+		)
+		n = n + 1
 
 		if temp.edit then
-			formspec = formspec ..
-				"field[1.3,3.2;6,.8;rename_box" .. i .. ";;"
-				..(waypoint.name or default_name).."]" ..
-				"image_button[7.3,2.9;.8,.8;"..
-				"ui_ok_icon.png;"..
-				"confirm_rename"..i.. ";]"..
-				"tooltip[confirm_rename" .. i .. ";"
-					.. F(S("Finish editing")).."]"
+			formspec[n] = string.format("field[%f,%f;%f,%f;rename_box%i;;%s]",
+				wp_buttons_rj - wp_edit_w - 0.1, wp_bottom_row - ui.style_full.btn_spc,
+				wp_edit_w, ui.style_full.btn_size, sel, (waypoint.name or default_name))
+			formspec[n+1] = string.format("image_button[%f,%f;%f,%f;ui_ok_icon.png;confirm_rename%i;]",
+				wp_buttons_rj, wp_bottom_row - ui.style_full.btn_spc,
+				ui.style_full.btn_size, ui.style_full.btn_size, sel)
+			formspec[n+2] = "tooltip[confirm_rename"..sel..";"..F(S("Finish editing")).."]"
+			n = n + 3
 		end
 
-		formspec = formspec .. "label[1,1.3;"..F(S("World position"))..": " ..
-			minetest.pos_to_string(waypoint.world_pos or vector.new()) .. "]" ..
-			"label[1,1.8;"..F(S("Name"))..": ".. (waypoint.name or default_name) .. "]" ..
-			"label[1,2.3;"..F(S("HUD text color"))..": " ..
-			hud_colors[waypoint.color or 1][3] .. "]"
+		formspec[n] = string.format("label[%f,%f;%s: %s]",
+			wp_info_x, wp_info_y+1.6, F(S("World position")),
+			minetest.pos_to_string(waypoint.world_pos or vector.new()))
+		formspec[n+1] = string.format("label[%f,%f;%s: %s]",
+			wp_info_x, wp_info_y+2.10, F(S("Name")), (waypoint.name or default_name))
+		formspec[n+2] = string.format("label[%f,%f;%s: %s]",
+			wp_info_x, wp_info_y+2.60, F(S("HUD text color")), hud_colors[waypoint.color or 1][3])
 
-		return {formspec=formspec}
+		return {
+			formspec = table.concat(formspec),
+			draw_inventory = not perplayer_formspec.is_lite_mode,
+		}
 	end,
 })
 
-unified_inventory.register_button("waypoints", {
+ui.register_button("waypoints", {
 	type = "image",
 	image = "ui_waypoints_icon.png",
 	tooltip = S("Waypoints"),
-	hide_lite=true
 })
 
 local function update_hud(player, waypoints, temp, i)
-	local waypoint = waypoints[i]
+	local waypoint = waypoints.data[i]
 	if not waypoint then return end
+
 	temp[i] = temp[i] or {}
 	temp = temp[i]
+
 	local pos = waypoint.world_pos or vector.new()
 	local name
 	if waypoint.display_pos then
@@ -129,10 +244,13 @@ local function update_hud(player, waypoints, temp, i)
 			name = name..", "..waypoint.name
 		end
 	else
-		name = waypoint.name or "Waypoint "..i
+		name = waypoint.name or S("Waypoint @1", i)
 	end
+
+	-- Perform HUD updates
 	if temp.hud then
 		player:hud_remove(temp.hud)
+		temp.hud = nil
 	end
 	if waypoint.active then
 		temp.hud = player:hud_add({
@@ -142,8 +260,6 @@ local function update_hud(player, waypoints, temp, i)
 			text = "m",
 			world_pos = pos
 		})
-	else
-		temp.hud = nil
 	end
 end
 
@@ -155,9 +271,11 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	local need_update_hud = false
 	local hit = false
 
-	local waypoints = datastorage.get(player_name, "waypoints")
+	local waypoints = get_waypoint_data(player)
 	local temp = waypoints_temp[player_name]
-	for i = 1, 5, 1 do
+	for i = 1, COUNT do
+		local waypoint = waypoints.data[i] or {}
+
 		if fields["select_waypoint"..i] then
 			hit = true
 			waypoints.selected = i
@@ -166,20 +284,15 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 
 		if fields["toggle_waypoint"..i] then
 			hit = true
-			waypoints[i] = waypoints[i] or {}
-			waypoints[i].active = not (waypoints[i].active)
+			waypoint.active = not (waypoint.active)
 			need_update_hud = true
 			update_formspec = true
 		end
 
 		if fields["set_waypoint"..i] then
 			hit = true
-			local pos = player:get_pos()
-			pos.x = math.floor(pos.x)
-			pos.y = math.floor(pos.y)
-			pos.z = math.floor(pos.z)
-			waypoints[i] = waypoints[i] or {}
-			waypoints[i].world_pos = pos
+			local pos = vector.round(player:get_pos())
+			waypoint.world_pos = pos
 			need_update_hud = true
 			update_formspec = true
 		end
@@ -193,51 +306,66 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 
 		if fields["toggle_display_pos"..i] then
 			hit = true
-			waypoints[i] = waypoints[i] or {}
-			waypoints[i].display_pos = not waypoints[i].display_pos
+			waypoint.display_pos = not waypoint.display_pos
 			need_update_hud = true
 			update_formspec = true
 		end
 
 		if fields["toggle_color"..i] then
 			hit = true
-			waypoints[i] = waypoints[i] or {}
-			local color = waypoints[i].color or 1
+			local color = waypoint.color or 0
 			color = color + 1
-			if color > hud_colors_max then
+			if color > #hud_colors then
 				color = 1
 			end
-			waypoints[i].color = color
+			waypoint.color = color
 			need_update_hud = true
 			update_formspec = true
 		end
 
 		if fields["confirm_rename"..i] then
 			hit = true
-			waypoints[i] = waypoints[i] or {}
+			temp[i] = temp[i] or {}
 			temp[i].edit = false
-			waypoints[i].name = fields["rename_box"..i]
+			waypoint.name = fields["rename_box"..i]
 			need_update_hud = true
 			update_formspec = true
 		end
+
+		if fields["teleport_waypoint" .. i] and waypoint.world_pos then
+			if minetest.get_player_privs(player_name).teleport then
+				minetest.sound_play("teleport", {to_player = player_name})
+				player:set_pos(waypoint.world_pos)
+			end
+		end
+
+		if hit then
+			-- Save first
+			waypoints.data[i] = waypoint
+			set_waypoint_data(player, waypoints)
+		end
+		-- Update after
 		if need_update_hud then
 			update_hud(player, waypoints, temp, i)
 		end
 		if update_formspec then
-			unified_inventory.set_inventory_formspec(player, "waypoints")
+			minetest.sound_play("ui_click", {to_player=player_name, gain = 0.1})
+			ui.set_inventory_formspec(player, "waypoints")
 		end
+
 		if hit then return end
 	end
 end)
 
-
-minetest.register_on_joinplayer(function(player)
+-- waypoints_temp must be initialized before the general unified_inventory
+-- joinplayer callback is run for updating the inventory
+table.insert(minetest.registered_on_joinplayers, 1, function(player)
 	local player_name = player:get_player_name()
-	local waypoints = datastorage.get(player_name, "waypoints")
-	local temp = {}
-	waypoints_temp[player_name] = temp
-	for i = 1, 5 do
-		update_hud(player, waypoints, temp, i)
+	local waypoints = get_waypoint_data(player)
+
+	waypoints_temp[player_name] = {}
+	for i = 1, COUNT do
+		update_hud(player, waypoints, waypoints_temp[player_name], i)
 	end
 end)