Purge recipes with invalid ingredients

Avoids circular dependencies of 3rd party mods with unified_inventory -> farming -> stairs.

api.lua

@@ -2,40 +2,49 @@ 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
+			if not minetest.registered_items[itemname]
+					or minetest.get_item_group(itemname, "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
+
+	-- 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
+		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 ui.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
-							ui.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
@@ -43,7 +52,9 @@ minetest.after(0.01, function()
 	end
 	table.sort(ui.items_list)
 	ui.items_list_size = #ui.items_list
-	print("Unified Inventory. inventory size: "..ui.items_list_size)
+	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
@@ -133,24 +144,42 @@ minetest.after(0.01, function()
 			end
 		end
 	end
-	for _, recipes in pairs(ui.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 = ui.canonical_item_spec_matcher(spec)
-				for _, name in ipairs(ui.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 ui.crafts_for.usage[name] == nil then
+				if not ui.crafts_for.usage[name] then
 					ui.crafts_for.usage[name] = {}
 				end
 				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
 
 	for _, callback in ipairs(ui.initialized_callbacks) do
@@ -158,8 +187,8 @@ minetest.after(0.01, function()
 	end
 end)
 
+---------------- Home API ----------------
 
--- load_home
 local function load_home()
 	local input = io.open(ui.home_filename, "r")
 	if not input then
@@ -176,6 +205,7 @@ local function load_home()
 	end
 	io.close(input)
 end
+
 load_home()
 
 function ui.set_home(player, pos)
@@ -204,7 +234,8 @@ function ui.go_home(player)
 	return false
 end
 
--- register_craft
+---------------- Crafting API ----------------
+
 function ui.register_craft(options)
 	if not options.output then
 		return
@@ -227,14 +258,12 @@ function ui.register_craft(options)
 	end
 end
 
-
 local craft_type_defaults = {
 	width = 3,
 	height = 3,
 	uses_crafting_grid = false,
 }
 
-
 function ui.craft_type_defaults(name, options)
 	if not options.description then
 		options.description = name
@@ -245,8 +274,7 @@ end
 
 
 function ui.register_craft_type(name, options)
-	ui.registered_craft_types[name] =
-			ui.craft_type_defaults(name, options)
+	ui.registered_craft_types[name] = ui.craft_type_defaults(name, options)
 end
 
 
@@ -303,6 +331,8 @@ ui.register_craft_type("digging_chance", {
 	height = 1,
 })
 
+---------------- GUI registrations ----------------
+
 function ui.register_page(name, def)
 	ui.pages[name] = def
 end
@@ -318,6 +348,8 @@ function ui.register_button(name, def)
 	table.insert(ui.buttons, def)
 end
 
+---------------- Callback registrations ----------------
+
 function ui.register_on_initialized(callback)
 	if type(callback) ~= "function" then
 		error(("Initialized callback must be a function, %s given."):format(type(callback)))
@@ -332,6 +364,8 @@ function ui.register_on_craft_registered(callback)
 	table.insert(ui.craft_registered_callbacks, callback)
 end
 
+---------------- List getters ----------------
+
 function ui.get_recipe_list(output)
 	return ui.crafts_for.recipe[output]
 end
@@ -344,11 +378,15 @@ function ui.get_registered_outputs()
 	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 "") )

bags.lua

@@ -114,6 +114,8 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	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 = {}
@@ -163,7 +165,7 @@ 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)
@@ -172,46 +174,29 @@ 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()
@@ -230,6 +215,20 @@ 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()]
@@ -12,19 +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", {
@@ -46,13 +46,21 @@ 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])
+	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
 
 minetest.register_on_player_receive_fields(function(player, formname, fields)
@@ -65,9 +73,12 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	end
 
 	-- always take new search text, even if not searching on it yet
+	local dirty_search_filter = false
+
 	if fields.searchbox
 	and fields.searchbox ~= unified_inventory.current_searchbox[player_name] then
 		unified_inventory.current_searchbox[player_name] = fields.searchbox
+		dirty_search_filter = true
 	end
 
 
@@ -88,19 +99,14 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 				unified_inventory.current_page[player_name])
 	end
 
-	if fields.next_category then
-		local scroll = math.min(#unified_inventory.category_list-ui_peruser.pagecols, unified_inventory.current_category_scroll[player_name] + 1)
-		if scroll ~= unified_inventory.current_category_scroll[player_name] then
-			unified_inventory.current_category_scroll[player_name] = scroll
-			unified_inventory.set_inventory_formspec(player,
-					unified_inventory.current_page[player_name])
-		end
-	end
-	if fields.prev_category then
-		local scroll = math.max(0, unified_inventory.current_category_scroll[player_name] - 1)
-		if scroll ~= unified_inventory.current_category_scroll[player_name] then
-			unified_inventory.current_category_scroll[player_name] = scroll
-			unified_inventory.set_inventory_formspec(player,
+	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
@@ -197,13 +203,16 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 
 	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})
+		if dirty_search_filter 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
-		apply_new_filter(player, "", "nochange")
+		if ui.activefilter[player_name] ~= "" then
+			apply_new_filter(player, "", "nochange")
+		end
 	end
 
 	-- alternate buttons
@@ -241,11 +250,8 @@ 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

@@ -96,6 +96,9 @@ function unified_inventory.register_category(category_name, config)
 	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

doc/mod_api.txt

@@ -1,7 +1,8 @@
 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:
 
@@ -23,7 +24,9 @@ Grouped by use-case, afterwards sorted alphabetically.
 Callbacks
 ---------
 
-Register a callback that will be run whenever a craft is registered via unified_inventory.register_craft:
+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)
@@ -163,68 +166,57 @@ Register a non-standard craft recipe:
 Categories
 ----------
 
-Register a new category:
-	The config table (second argument) is optional, and all its members are optional
-	See the unified_inventory.set_category_* functions for more details on the members of the config table
+ * `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 = "mod_name:item_name" or "texture.png",
+		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
 
-Add / override the symbol for a category:
-	The category does not need to exist first
-	The symbol can be an item name or a texture image
-	If unset this will default to "default:stick"
+Modifier functions (to be removed)
 
-	unified_inventory.set_category_symbol("category_name", "mod_name:item_name" or "texture.png")
+ * `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
 
-Add / override the human readable label for a category:
-	If unset this will default to the category name
+Item management
 
-	unified_inventory.set_category_label("category_name", "Human Readable Label")
+ * `	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)
 
-Add / override the sorting index of the category:
-	Must be a number, can also be negative (-5) or fractional (2.345)
-	This determines the position the category appears in the list of categories
-	The "all" meta-category has index -2, the "misc"/"uncategorized" meta-category has index -1, use a negative number smaller than these to make a category appear before these in the list
-	By default categories are sorted alphabetically with an index between 0.0101(AA) and 0.2626(ZZ)
-
-	unified_inventory.set_category_index("category_name", 5)
-
-Add a single item to a category:
-
-	unified_inventory.add_category_item("category_name", "mod_name:item_name")
-
-Add multiple items to a category:
-
-	unified_inventory.add_category_items("category_name", {
-		"mod_name:item_name",
-		"another_mod:different_item"
-	})
-
-Remove an item from a category:
-
-	unified_inventory.remove_category_item("category_name", "mod_name:item_name")
-
-Remove a category entirely:
-
-	unified_inventory.remove_category("category_name")
-
-Finding existing items in categories:
-	This will find the first category an item exists in
-	It should be used for checking if an item is catgorised
-	Returns "category_name" or nil
-
-	unified_inventory.find_category("mod_name:item_name")
-
-
-	This will find all the categories an item exists in
-	Returns a number indexed table (list) of category names
-
-	unified_inventory.find_categories("mod_name:item_name")

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

@@ -1,5 +1,11 @@
 -- 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()
 
@@ -44,9 +50,11 @@ unified_inventory = {
 	trash_enabled = (minetest.settings:get_bool("unified_inventory_trash") ~= false),
 	imgscale = 1.25,
 	list_img_offset = 0.13,
-	standard_background = "background9[0,0;1,1;ui_formbg_9_sliced.png;true;16]",
+	standard_background = "bgcolor[#0000]background9[0,0;1,1;ui_formbg_9_sliced.png;true;16]",
 
-	version = 3
+	hide_disabled_buttons = minetest.settings:get_bool("unified_inventory_hide_disabled_buttons", false),
+
+	version = 4
 }
 
 local ui = unified_inventory
@@ -59,10 +67,16 @@ ui.style_full = {
 	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,
@@ -74,13 +88,15 @@ ui.style_full = {
 	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,
-	page_buttons_x = 11.60,
-	page_buttons_y = 10.15,
-	searchwidth = 3.4,
+	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,
@@ -92,10 +108,16 @@ ui.style_lite = {
 	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,
@@ -107,13 +129,15 @@ ui.style_lite = {
 	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,
-	page_buttons_x = 10.5,
-	page_buttons_y = 6.15,
-	searchwidth = 1.6,
+	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,
@@ -170,4 +194,4 @@ end
 
 dofile(modpath.."/item_names.lua")
 dofile(modpath.."/waypoints.lua")
-minetest.log("action", "[unified_inventory] loaded.")
+dofile(modpath.."/legacy.lua") -- mod compatibility

internal.lua

@@ -18,7 +18,7 @@ function ui.demangle_for_formspec(str)
 	return string.gsub(str, "_([0-9]+)_", function (v) return string.char(v) end)
 end
 
-
+-- 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})
 
@@ -27,6 +27,7 @@ function ui.get_per_player_formspec(player_name)
 	return style
 end
 
+-- 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
@@ -43,52 +44,68 @@ local function formspec_button(ui_peruser, name, image, offset, pos, scale, labe
 		string.format("tooltip[%s;%s]", name, F(label or name))
 end
 
-local function formspec_add_filters(player, formspec, style)
-	local button_row = 0
-	local button_col = 0
+-- Add registered buttons (tabs)
+local function formspec_tab_buttons(player, formspec, style)
 	local n = #formspec + 1
 
 	-- Main buttons
 
 	local filtered_inv_buttons = {}
 
-	for i, def in pairs(ui.buttons) do
+	for _, def in pairs(ui.buttons) do
 		if not (style.is_lite_mode and def.hide_lite) then
-			table.insert(filtered_inv_buttons, def)
+			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 j = 1 --Modif NALC (sys4 20/11/2018) 12 buttons max by row
+	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
-		if style.is_lite_mode and i > 4 then
-			button_row = 1
-			button_col = 1
-		elseif not draw_lite_mode and j > 12 then
-			button_row = 1
-			j = 1
-		end
+		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
-			local pos_x = style.main_button_x + style.btn_spc * (j - 1) - button_col * style.btn_spc * 4
-			local pos_y = style.main_button_y + button_row * style.btn_spc
-			if (def.condition == nil or def.condition(player) == true) then
-				formspec[n] = string.format("image_button[%f,%f;%f,%f;%s;%s;]",
+			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[%f,%f;%f,%f;%s^[colorize:#808080:alpha]",
+				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
-		j = j + 1 -- Modif NALC
+	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
@@ -102,9 +119,9 @@ local function formspec_add_categories(player, formspec, ui_peruser)
 		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;3]",
-		ui_peruser.page_x-0.1, categories_scroll_pos[2],
-		(ui_peruser.btn_spc * ui_peruser.pagecols) + 0.13, 1.4 + (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
 
@@ -243,8 +260,14 @@ local function formspec_add_item_browser(player, formspec, ui_peruser)
 					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(item.description)
+					button_name, minetest.formspec_escape(tooltip)
 				)
 				n = n + 2
 				list_index = list_index + 1
@@ -285,7 +308,7 @@ function ui.get_formspec(player, page)
 
 	fs[#fs + 1] = fsdata.formspec
 
-	formspec_add_filters(player, fs, ui_peruser)
+	formspec_tab_buttons(player, fs, ui_peruser)
 
 	if fsdata.draw_inventory ~= false then
 		-- Player inventory
@@ -310,7 +333,7 @@ function ui.set_inventory_formspec(player, page)
 	end
 end
 
-local function valid_def(def)
+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
@@ -323,9 +346,11 @@ function ui.apply_filter(player, filter, search_dir)
 		return false
 	end
 	local player_name = player:get_player_name()
+
 	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)
 			for _, group in ipairs(groups) do
@@ -337,7 +362,10 @@ function ui.apply_filter(player, filter, search_dir)
 			return true
 		end
 	else
-		local lang = minetest.get_player_information(player_name).lang_code
+		-- 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, def)
 			local lname = string.lower(name)
 			local ldesc = string.lower(def.description)
@@ -347,37 +375,53 @@ function ui.apply_filter(player, filter, search_dir)
 				or llocaldesc and string.find(llocaldesc, lfilter, 1, true)
 		end
 	end
-	ui.filtered_items_list[player_name]={}
+
+	local is_itemdef_listable = ui.is_itemdef_listable
+	local filtered_items = {}
+
 	local category = ui.current_category[player_name] or 'all'
 	if category == 'all' then
 		for name, def in pairs(minetest.registered_items) do
-			if valid_def(def)
+			if is_itemdef_listable(def)
 			and ffilter(name, def) then
-				table.insert(ui.filtered_items_list[player_name], name)
+				table.insert(filtered_items, name)
 			end
 		end
 	elseif category == 'uncategorized' then
 		for name, def in pairs(minetest.registered_items) do
-			if (not ui.find_category(name))
-			and valid_def(def)
+			if is_itemdef_listable(def)
+			and not ui.find_category(name)
 			and ffilter(name, def) then
-				table.insert(ui.filtered_items_list[player_name], name)
+				table.insert(filtered_items, name)
 			end
 		end
 	else
-		for name,exists in pairs(ui.registered_category_items[category]) do
+		-- Any other category is selected
+		for name, exists in pairs(ui.registered_category_items[category]) do
 			local def = minetest.registered_items[name]
 			if exists and def
-			and valid_def(def)
+			and is_itemdef_listable(def)
 			and ffilter(name, def) then
-				table.insert(ui.filtered_items_list[player_name], name)
+				table.insert(filtered_items, name)
 			end
 		end
 	end
-	table.sort(ui.filtered_items_list[player_name])
-	ui.filtered_items_list_size[player_name] = #ui.filtered_items_list[player_name]
+	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
+
+-- 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
+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/unified_inventory.de.tr

@@ -7,17 +7,17 @@ Bag @1=Tasche @1
 Small Bag=Kleine Tasche
 Medium Bag=Mittelgroße Tasche
 Large Bag=Große Tasche
-All Items=
-Misc. Items=
-Plant Life=
-Building Materials=
-Tools=
-Minerals and Metals=
-Environment and Worldgen=
-Lighting=
+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=
-Scroll categories right=
+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
@@ -76,10 +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
-Hide waypoint=
-Show waypoint=
-Hide coordinates=
-Show coordinates=
+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

locale/unified_inventory.zh_CN.tr

@@ -7,17 +7,17 @@ Bag @1=背包@1
 Small Bag=小背包
 Medium Bag=中背包
 Large Bag=大背包
-All Items=
-Misc. Items=
-Plant Life=
-Building Materials=
-Tools=
-Minerals and Metals=
-Environment and Worldgen=
-Lighting=
+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=
-Scroll categories right=
+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
@@ -32,7 +32,7 @@ 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=
+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
@@ -45,7 +45,7 @@ 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
 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.=
+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：
@@ -57,13 +57,13 @@ No recipes=没有配方
 No usages=没有用法
 Result=结果
 Ingredient=原料
-Show next recipe=
-Show next usage=
-Show previous recipe=
-Show previous usage=
-@1 (@2)=
+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.=
+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
@@ -76,10 +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
-Hide waypoint=
-Show waypoint=
-Hide coordinates=
-Show coordinates=
+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

locale/unified_inventory.zh_TW.tr

@@ -7,17 +7,17 @@ Bag @1=揹包@1
 Small Bag=小揹包
 Medium Bag=中揹包
 Large Bag=大揹包
-All Items=
-Misc. Items=
-Plant Life=
-Building Materials=
-Tools=
-Minerals and Metals=
-Environment and Worldgen=
-Lighting=
+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=
-Scroll categories right=
+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
@@ -32,7 +32,7 @@ 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=
+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
@@ -45,7 +45,7 @@ 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
 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.=
+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：
@@ -57,13 +57,13 @@ No recipes=沒有配方
 No usages=沒有用法
 Result=結果
 Ingredient=原料
-Show next recipe=
-Show next usage=
-Show previous recipe=
-Show previous usage=
-@1 (@2)=
+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.=
+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
@@ -76,10 +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
-Hide waypoint=
-Show waypoint=
-Hide coordinates=
-Show coordinates=
+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

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

@@ -1,6 +1,6 @@
 name = unified_inventory
 
-optional_depends = default, 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.

register.lua

@@ -41,6 +41,55 @@ ui.register_button("craftguide", {
 	tooltip = S("Crafting Guide")
 })
 
+ui.register_button("home_gui_set", {
+	type = "image",
+	image = "ui_sethome_icon.png",
+	tooltip = S("Set home position"),
+	hide_lite=true,
+	action = function(player)
+		local player_name = player:get_player_name()
+		if minetest.check_player_privs(player_name, {home=true}) then
+			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})
+				minetest.chat_send_player(player_name,
+					S("Home position set to: @1", minetest.pos_to_string(home)))
+			end
+		else
+			minetest.chat_send_player(player_name,
+				S("You don't have the \"home\" privilege!"))
+			ui.set_inventory_formspec(player, ui.current_page[player_name])
+		end
+	end,
+	condition = function(player)
+		return minetest.check_player_privs(player:get_player_name(), {home=true})
+	end,
+})
+
+ui.register_button("home_gui_go", {
+	type = "image",
+	image = "ui_gohome_icon.png",
+	tooltip = S("Go home"),
+	hide_lite=true,
+	action = function(player)
+		local player_name = player:get_player_name()
+		if minetest.check_player_privs(player_name, {home=true}) 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!"))
+			ui.set_inventory_formspec(player, ui.current_page[player_name])
+		end
+	end,
+	condition = function(player)
+		return minetest.check_player_privs(player:get_player_name(), {home=true})
+	end,
+})
+
 ui.register_button("misc_set_day", {
 	type = "image",
 	image = "ui_sun_icon.png",
@@ -158,11 +207,9 @@ ui.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 wear = item:get_wear()
 	local description = item:get_meta():get_string("description")
 	local show_is_group = false
-	local displayitem = name.." "..count.." "..wear
+	local displayitem = item:to_string()
 	local selectitem = name
 	if name:sub(1, 6) == "group:" then
 		local group_name = name:sub(7)
@@ -196,6 +243,9 @@ local function stack_image_button(x, y, w, h, buttonname_prefix, item)
 	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"),
@@ -450,6 +500,14 @@ local function craftguide_craft(player, formname, fields)
 	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
 
 	ui.craftguide_match_craft(player, "main", "craft", craft, amount)

settingtypes.txt

@@ -10,5 +10,8 @@ unified_inventory_bags (Enable bags) bool true
 #and the give privilege.
 unified_inventory_trash (Enable trash) bool true
 
+#If enabled, disabled buttons will be hidden instead of grayed out.
+unified_inventory_hide_disabled_buttons (Hide disabled buttons) bool false
 
-unified_inventory_automatic_categorization (Items automatically added to categories) bool true
+
+unified_inventory_automatic_categorization (Items automatically added to categories) bool true