Minor cleaning

API.md

@@ -17,9 +17,7 @@ i3.new_tab("stuff", {
 	-- Determine if the tab is visible by a player, `false` or `nil` hide the tab
 	access = function(player, data)
 		local name = player:get_player_name()
-		if name == "singleplayer" then
-			return false
-		end
+		return name == "singleplayer"
 	end,
 
 	formspec = function(player, data, fs)

init.lua

@@ -13,13 +13,14 @@ print[[
 local modpath = core.get_modpath"i3"
 local http = core.request_http_api()
 local storage = core.get_mod_storage()
-local _loadfile = dofile(modpath .. "/src/operators.lua")
+local _loadfile = dofile(modpath .. "/src/preprocessor.lua")
 
 local function lf(path)
 	return assert(_loadfile(modpath .. path))
 end
 
 i3 = {
+	version = 173,
 	data = core.deserialize(storage:get_string"data") or {},
 
 	settings = {
@@ -63,7 +64,7 @@ i3 = {
 		caches = lf"/src/caches.lua",
 		callbacks = lf"/src/callbacks.lua",
 		common = lf"/src/common.lua",
-		compress = lf"/src/compress.lua",
+		compress = lf"/src/compression.lua",
 		detached = lf"/src/detached_inv.lua",
 		fields = lf"/src/fields.lua",
 		groups = lf"/src/groups.lua",
@@ -82,6 +83,7 @@ i3 = {
 
 	tabs = {},
 	cubes = {},
+	groups = {},
 	plants = {},
 	modules = {},
 	craft_types = {},

src/api.lua

@@ -167,6 +167,13 @@ function i3.set_fs(player)
 		sort_inventory(player, data)
 	end
 
+	for i, tab in ipairs(i3.tabs) do
+		if data.tab == i and tab.access and not tab.access(player, data) then
+			data.tab = 1
+			break
+		end
+	end
+
 	local fs = make_fs(player, data)
 	player:set_inventory_formspec(fs)
 end
@@ -221,8 +228,8 @@ function i3.set_tab(player, tabname)
 		return
 	end
 
-	for i, def in ipairs(i3.tabs) do
-		if def.name == tabname then
+	for i, tab in ipairs(i3.tabs) do
+		if tab.name == tabname then
 			data.tab = i
 			return
 		end

src/caches.lua

@@ -1,11 +1,10 @@
-local PNG = i3.files.styles()
 local replacements = {fuel = {}}
 local http = ...
 
 IMPORT("maxn", "copy", "insert", "sort", "match", "sub")
-IMPORT("is_group", "extract_groups", "item_has_groups", "groups_to_items")
-IMPORT("fmt", "reg_items", "reg_aliases", "reg_nodes", "draw_cube", "ItemStack")
-IMPORT("true_str", "true_table", "is_table", "valid_item", "table_merge", "table_replace", "rcp_eq")
+IMPORT("true_str", "is_table", "valid_item", "table_merge", "table_replace", "rcp_eq")
+IMPORT("fmt", "reg_items", "reg_aliases", "reg_nodes", "is_cube", "get_cube", "ItemStack")
+IMPORT("is_group", "extract_groups", "item_has_groups", "groups_to_items", "get_group_stereotype")
 
 local function get_burntime(item)
 	return core.get_craft_result{method = "fuel", items = {item}}.time
@@ -23,10 +22,56 @@ local function cache_fuel(item)
 	end
 end
 
-local function get_item_usages(item, recipe, added)
-	local groups = extract_groups(item)
+local function cache_groups(group, groups)
+	i3.groups[group] = {}
+	i3.groups[group].groups = groups
+	i3.groups[group].items = groups_to_items(groups)
+
+	if #groups == 1 then
+		i3.groups[group].stereotype = get_group_stereotype(groups[1])
+	end
+
+	local items = i3.groups[group].items
+	if #items <= 1 then return end
+
+	local px, lim, c = 64, 10, 0
+	local sprite = "[combine:WxH"
+
+	for _, item in ipairs(items) do
+		local def = reg_items[item]
+		local tiles = def.tiles or def.tile_images
+		local texture = true_str(def.inventory_image) and def.inventory_image --or tiles[1]
+
+		if def.drawtype and is_cube(def.drawtype) then
+			texture = get_cube(tiles)
+		end
+
+		if texture then
+			texture = texture:gsub("%^", "\\^"):gsub(":", "\\:") .. fmt("\\^[resize\\:%ux%u", px, px)
+			sprite = sprite .. fmt(":0,%u=%s", c * px, texture)
+			c++
+			if c == lim then break end
+		end
+	end
+
+	if c > 1 then
+		sprite = sprite:gsub("WxH", px .. "x" .. px * c)
+
+		i3.groups[group].sprite = sprite
+		i3.groups[group].count = c
+	end
+end
+
+local function get_item_usages(item, recipe, added)
+	if is_group(item) then
+		local group = item:sub(7)
+		local group_cache = i3.groups[group]
+		local groups = group_cache and group_cache.groups or extract_groups(item)
+
+		if not group_cache then
+			cache_groups(group, groups)
+		end
 
-	if groups then
 		for name, def in pairs(reg_items) do
 			if not added[name] and valid_item(def) and item_has_groups(def.groups, groups) then
 				local usage = copy(recipe)
@@ -181,7 +226,7 @@ core.register_craft = function(def)
 
 	if is_group(output[1]) then
 		groups = extract_groups(output[1])
-		output = groups_to_items(groups, true)
+		output = groups_to_items(groups)
 	end
 
 	for i = 1, #output do
@@ -242,7 +287,7 @@ local function resolve_aliases(hash)
 			end
 		end
 
-		if newname ~= "" and i3.recipes_cache[oldname] and not hash[newname] then
+		if newname ~= "" and i3.recipes_cache[oldname] and reg_items[newname] and not hash[newname] then
 			insert(i3.init_items, newname)
 		end
 	end
@@ -284,40 +329,20 @@ local function init_recipes()
 	end
 end
 
-local function get_cube(tiles)
-	if not true_table(tiles) then
-		return PNG.blank
-	end
-
-	local top = tiles[1] or PNG.blank
-	if is_table(top) then
-		top = top.name or top.image
-	end
-
-	local left = tiles[3] or top or PNG.blank
-	if is_table(left) then
-		left = left.name or left.image
-	end
-
-	local right = tiles[5] or left or PNG.blank
-	if is_table(right) then
-		right = right.name or right.image
-	end
-
-	return draw_cube(top, left, right)
-end
-
 local function init_cubes()
 	for name, def in pairs(reg_nodes) do
 		if def then
 			local id = core.get_content_id(name)
+			local tiles = def.tiles or def.tile_images
 
-			if def.drawtype == "normal" or def.drawtype == "liquid" or
-					sub(def.drawtype, 1, 9) == "glasslike" or
-					sub(def.drawtype, 1, 8) == "allfaces" then
-				i3.cubes[id] = get_cube(def.tiles)
+			if is_cube(def.drawtype) then
+				i3.cubes[id] = get_cube(tiles)
 			elseif sub(def.drawtype, 1, 9) == "plantlike" or sub(def.drawtype, 1, 8) == "firelike" then
-				i3.plants[id] = def.inventory_image .. "^\\[resize:16x16"
+				local texture = true_str(def.inventory_image) and def.inventory_image or tiles[1]
+
+				if texture then
+					i3.plants[id] = texture
+				end
 			end
 		end
 	end

src/common.lua

@@ -9,6 +9,14 @@ local fmt, find, match, gmatch, sub, split, lower, upper =
 	string.format, string.find, string.match, string.gmatch,
 	string.sub, string.split, string.lower, string.upper
 
+if not core.registered_privileges.creative then
+	core.register_privilege("creative", {
+		description = "Allow player to use creative inventory",
+		give_to_singleplayer = false,
+		give_to_admin = false,
+	})
+end
+
 local old_is_creative_enabled = core.is_creative_enabled
 
 function core.is_creative_enabled(name)
@@ -69,6 +77,16 @@ local function toupper(str)
 	return str:gsub("%f[%w]%l", upper):gsub("_", " ")
 end
 
+local function utf8_len(str)
+	local c = 0
+
+	for _ in str:gmatch"([%z\1-\127\194-\244][\128-\191]*)" do -- Arguably working duct-tape code
+		c++
+	end
+
+	return c
+end
+
 local function get_bag_description(data, stack)
 	local desc = translate(data.lang_code, stack:get_description())
 	      desc = split(desc, "(")[1] or desc
@@ -101,7 +119,7 @@ local function search(data)
 	for i = 1, #data.items_raw do
 		local item = data.items_raw[i]
 		local def = reg_items[item]
-		local desc = lower(translate(data.lang_code, def and def.description)) or ""
+		local desc = lower(translate(data.lang_code, def.description)) or ""
 		local search_in = fmt("%s %s", item, desc)
 		local temp, j, to_add = {}, 1
 
@@ -228,9 +246,7 @@ local function is_group(item)
 end
 
 local function extract_groups(str)
-	if sub(str, 1, 6) == "group:" then
-		return split(sub(str, 7), ",")
-	end
+	return split(sub(str, 7), ",")
 end
 
 local function item_has_groups(item_groups, groups)
@@ -247,30 +263,56 @@ local function valid_item(def)
 		def.description and def.description ~= ""
 end
 
-local function groups_to_items(groups, get_all)
-	if not get_all and #groups == 1 then
-		local group = groups[1]
-		local stereotype = i3.group_stereotypes[group]
-		local def = reg_items[stereotype]
+local function get_group_stereotype(group)
+	local stereotype = i3.group_stereotypes[group]
+	local def = reg_items[stereotype]
 
-		if valid_item(def) then
-			return stereotype
-		end
+	if valid_item(def) then
+		return stereotype
 	end
+end
 
+local function groups_to_items(groups)
 	local names = {}
 
 	for name, def in pairs(reg_items) do
 		if valid_item(def) and item_has_groups(def.groups, groups) then
-			if get_all then
-				insert(names, name)
-			else
-				return name
-			end
+			insert(names, name)
 		end
 	end
 
-	return get_all and names or ""
+	sort(names)
+
+	return names
+end
+
+local function is_cube(drawtype)
+	return drawtype == "normal" or drawtype == "liquid" or
+		sub(drawtype, 1, 9) == "glasslike" or
+		sub(drawtype, 1, 8) == "allfaces"
+end
+
+local function get_cube(tiles)
+	if not true_table(tiles) then
+		return "i3_blank.png"
+	end
+
+	local top = tiles[1] or "i3_blank.png"
+	if is_table(top) then
+		top = top.name or top.image
+	end
+
+	local left = tiles[3] or top or "i3_blank.png"
+	if is_table(left) then
+		left = left.name or left.image
+	end
+
+	local right = tiles[5] or left or "i3_blank.png"
+	if is_table(right) then
+		right = right.name or right.image
+	end
+
+	return core.inventorycube(top, left, right)
 end
 
 local function apply_recipe_filters(recipes, player)
@@ -377,7 +419,8 @@ local function craft_stack(player, data, craft_rcp)
 		if is_group(name) then
 			items = {}
 			local groups = extract_groups(name)
-			local item_groups = groups_to_items(groups, true)
+			local groupname = name:sub(7)
+			local item_groups = i3.groups[groupname].items or groups_to_items(groups)
 			local remaining = count
 
 			for _, item in ipairs(item_groups) do
@@ -573,6 +616,7 @@ local function reset_data(data)
 	data.scrbar_rcp    = 1
 	data.scrbar_usg    = 1
 	data.query_item    = nil
+	data.enable_search = nil
 	data.recipes       = nil
 	data.usages        = nil
 	data.export_rcp    = nil
@@ -592,7 +636,7 @@ local function add_hud_waypoint(player, name, pos, color)
 	return player:hud_add {
 		hud_elem_type = "waypoint",
 		name = name,
-		text = " m",
+		text = "m",
 		world_pos = pos,
 		number = color,
 		z_index = -300,
@@ -633,6 +677,7 @@ local _ = {
 	extract_groups = extract_groups,
 	item_has_groups = item_has_groups,
 	groups_to_items = groups_to_items,
+	get_group_stereotype = get_group_stereotype,
 
 	-- Compression
 	compressible = compressible,
@@ -660,6 +705,8 @@ local _ = {
 	msg = msg,
 
 	-- Misc. functions
+	is_cube = is_cube,
+	get_cube = get_cube,
 	ItemStack = ItemStack,
 	valid_item = valid_item,
 	spawn_item = spawn_item,
@@ -712,6 +759,7 @@ local _ = {
 	match = string.match,
 	gmatch = string.gmatch,
 	toupper = toupper,
+	utf8_len = utf8_len,
 
 	-- Table
 	maxn = table.maxn,

src/fields.lua

@@ -1,456 +1,468 @@
-local set_fs = i3.set_fs
-
-IMPORT("vec_eq", "vec_round")
-IMPORT("reg_items", "reg_aliases")
-IMPORT("S", "random", "translate", "ItemStack")
-IMPORT("sort", "copy", "insert", "remove", "indexof")
-IMPORT("fmt", "find", "match", "sub", "lower", "split", "toupper")
-IMPORT("msg", "is_fav", "pos_to_str", "str_to_pos", "add_hud_waypoint", "play_sound", "reset_data")
-IMPORT("search", "get_sorting_idx", "sort_inventory", "sort_by_category", "get_recipes", "get_detached_inv")
-IMPORT("valid_item", "get_stack", "craft_stack", "clean_name", "compressible", "check_privs", "safe_teleport")
-
-local function inv_fields(player, data, fields)
-	local name = data.player_name
-	local inv = player:get_inventory()
-	local sb_inv = fields.scrbar_inv
-
-	if sb_inv and sub(sb_inv, 1, 3) == "CHG" then
-		data.scrbar_inv = tonumber(match(sb_inv, "%d+"))
-		return
-	end
-
-	if fields.drop_items then
-		local items = split(fields.drop_items, ",")
-		data.drop_items = items
-	end
-
-	for field in pairs(fields) do
-		if sub(field, 1, 4) == "btn_" then
-			data.subcat = indexof(i3.categories, sub(field, 5))
-			break
-
-		elseif sub(field, 1, 3) == "cb_" then
-			local str = sub(field, 4)
-			data[str] = false
-
-			if fields[field] == "true" then
-				data[str] = true
-			end
-
-		elseif sub(field, 1, 8) == "setting_" then
-			data.show_setting = match(field, "_(%w+)$")
-
-		elseif sub(field, 1, 9) == "skin_btn_" then
-			local id = tonumber(field:match("%d+"))
-			local _skins = skins.get_skinlist_for_player(name)
-			skins.set_player_skin(player, _skins[id])
-
-		elseif find(field, "waypoint_%d+") then
-			local id, action = match(field, "_(%d+)_(%w+)$")
-			      id = tonumber(id)
-			local waypoint = data.waypoints[id]
-			if not waypoint then return end
-
-			if action == "see" then
-				if data.waypoint_see and data.waypoint_see == id then
-					data.waypoint_see = nil
-				else
-					data.waypoint_see = id
-				end
-
-			elseif action == "delete" then
-				player:hud_remove(waypoint.id)
-				remove(data.waypoints, id)
-
-			elseif action == "teleport" then
-				local pos = str_to_pos(waypoint.pos)
-				safe_teleport(player, pos)
-				msg(name, S("Teleported to: @1", waypoint.name))
-
-			elseif action == "refresh" then
-				local color = random(0xffffff)
-				waypoint.color = color
-				player:hud_change(waypoint.id, "number", color)
-
-			elseif action == "hide" then
-				if waypoint.hide then
-					local new_id = add_hud_waypoint(
-						player, waypoint.name, str_to_pos(waypoint.pos), waypoint.color)
-
-					waypoint.id = new_id
-					waypoint.hide = nil
-				else
-					player:hud_remove(waypoint.id)
-					waypoint.hide = true
-				end
-			end
-
-			break
-		end
-	end
-
-	if fields.quit then
-		data.confirm_trash = nil
-		data.show_settings = nil
-		data.waypoint_see = nil
-		data.bag_rename = nil
-
-	elseif fields.trash then
-		data.show_settings = nil
-		data.confirm_trash = true
-
-	elseif fields.settings then
-		if not data.show_settings then
-			data.confirm_trash = nil
-			data.show_settings = true
-		else
-			data.show_settings = nil
-		end
-
-	elseif fields.confirm_trash_yes or fields.confirm_trash_no then
-		if fields.confirm_trash_yes then
-			inv:set_list("main", {})
-			inv:set_list("craft", {})
-		end
-
-		data.confirm_trash = nil
-
-	elseif fields.close_settings then
-		data.show_settings = nil
-
-	elseif fields.close_preview then
-		data.waypoint_see = nil
-
-	elseif fields.sort then
-		sort_inventory(player, data)
-
-	elseif fields.prev_sort or fields.next_sort then
-		local idx = get_sorting_idx(data.sort)
-		local tot = #i3.sorting_methods
-
-		idx -= (fields.prev_sort and 1 or -1)
-
-		if idx > tot then
-			idx = 1
-		elseif idx == 0 then
-			idx = tot
-		end
-
-		data.sort = i3.sorting_methods[idx].name
-
-	elseif fields.home then
-		if not data.home then
-			return msg(name, "No home set")
-		elseif not check_privs(name, {home = true}) then
-			return msg(name, "'home' privilege missing")
-		end
-
-		safe_teleport(player, str_to_pos(data.home))
-		msg(name, S"Welcome back home!")
-
-	elseif fields.set_home then
-		data.home = pos_to_str(player:get_pos(), 1)
-
-	elseif fields.bag_rename then
-		data.bag_rename = true
-
-	elseif fields.confirm_rename then
-		local bag = get_detached_inv("bag", name)
-		local bagstack = bag:get_stack("main", 1)
-		local meta = bagstack:get_meta()
-		local desc = translate(data.lang_code, bagstack:get_description())
-		local fill = split(desc, "(")[2]
-		local newname = fields.bag_newname:gsub("([%(%)])", "")
-		      newname = toupper(newname:trim())
-
-		if fill then
-			newname = fmt("%s (%s", newname, fill)
-		end
-
-		meta:set_string("description", newname)
-		bag:set_stack("main", 1, bagstack)
-
-		data.bag = bagstack:to_string()
-		data.bag_rename = nil
-
-	elseif fields.waypoint_add then
-		local max_waypoints = i3.settings.max_waypoints
-
-		if #data.waypoints >= max_waypoints then
-			play_sound(name, "i3_cannot", 0.8)
-			return msg(name, fmt("Waypoints limit reached (%u)", max_waypoints))
-		end
-
-		local pos = player:get_pos()
-
-		for _, v in ipairs(data.waypoints) do
-			if vec_eq(vec_round(pos), vec_round(str_to_pos(v.pos))) then
-				play_sound(name, "i3_cannot", 0.8)
-				return msg(name, S"You already set a waypoint at this position")
-			end
-		end
-
-		local waypoint = fields.waypoint_name
-
-		if fields.waypoint_name == "" then
-			waypoint = "Waypoint"
-		end
-
-		local color = random(0xffffff)
-		local id = add_hud_waypoint(player, waypoint, pos, color)
-
-		insert(data.waypoints, {
-			name  = waypoint,
-			pos   = pos_to_str(pos, 1),
-			color = color,
-			id    = id,
-		})
-
-		data.scrbar_inv += 1000
-
-	elseif fields.hide_debug_grid then
-		data.hide_debug_grid = not data.hide_debug_grid
-	end
-
-	return set_fs(player)
-end
-
-local function select_item(player, data, _f)
-	local item
-
-	for field in pairs(_f) do
-		if find(field, ":") then
-			item = field
-			break
-		end
-	end
-
-	if not item then return end
-
-	if compressible(item, data) then
-		local idx
-
-		for i = 1, #data.items do
-			local it = data.items[i]
-			if it == item then
-				idx = i
-				break
-			end
-		end
-
-		if data.expand ~= "" then
-			data.alt_items = nil
-
-			if item == data.expand then
-				data.expand = nil
-				return
-			end
-		end
-
-		if idx and item ~= data.expand then
-			data.alt_items = copy(data.items)
-			data.expand = item
-
-			if i3.compress_groups[item] then
-				local items = copy(i3.compress_groups[item])
-				insert(items, fmt("_%s", item))
-
-				sort(items, function(a, b)
-					if a:sub(1, 1) == "_" then
-						a = a:sub(2)
-					end
-
-					return a < b
-				end)
-
-				local i = 1
-
-				for _, v in ipairs(items) do
-					if valid_item(reg_items[clean_name(v)]) then
-						insert(data.alt_items, idx + i, v)
-						i++
-					end
-				end
-			end
-		end
-	else
-		if sub(item, 1, 1) == "_" then
-			item = sub(item, 2)
-		elseif sub(item, 1, 6) == "group!" then
-			item = match(item, "([%w:_]+)$")
-		end
-
-		item = reg_aliases[item] or item
-		if not reg_items[item] then return end
-
-		if core.is_creative_enabled(data.player_name) then
-			local stack = ItemStack(item)
-			local stackmax = stack:get_stack_max()
-			      stack = fmt("%s %s", item, stackmax)
-
-			return get_stack(player, stack)
-		end
-
-		if item == data.query_item then return end
-		local recipes, usages = get_recipes(player, item)
-
-		data.query_item = item
-		data.recipes    = recipes
-		data.usages     = usages
-		data.rnum       = 1
-		data.unum       = 1
-		data.scrbar_rcp = 1
-		data.scrbar_usg = 1
-		data.export_rcp = nil
-		data.export_usg = nil
-	end
-end
-
-local function rcp_fields(player, data, fields)
-	local sb_rcp, sb_usg = fields.scrbar_rcp, fields.scrbar_usg
-
-	if fields.cancel then
-		reset_data(data)
-
-	elseif fields.exit then
-		data.query_item = nil
-
-	elseif fields.key_enter_field == "filter" or fields.search then
-		if fields.filter == "" then
-			reset_data(data)
-			return set_fs(player)
-		end
-
-		local str = lower(fields.filter)
-		if data.filter == str then return end
-
-		data.filter = str
-		data.pagenum = 1
-
-		search(data)
-
-		if data.itab > 1 then
-			sort_by_category(data)
-		end
-
-	elseif fields.prev_page or fields.next_page then
-		if data.pagemax == 1 then return end
-		data.pagenum -= (fields.prev_page and 1 or -1)
-
-		if data.pagenum > data.pagemax then
-			data.pagenum = 1
-		elseif data.pagenum == 0 then
-			data.pagenum = data.pagemax
-		end
-
-	elseif fields.prev_skin or fields.next_skin then
-		if data.skin_pagemax == 1 then return end
-		data.skin_pagenum -= (fields.prev_skin and 1 or -1)
-
-		if data.skin_pagenum > data.skin_pagemax then
-			data.skin_pagenum = 1
-		elseif data.skin_pagenum == 0 then
-			data.skin_pagenum = data.skin_pagemax
-		end
-
-	elseif fields.prev_recipe or fields.next_recipe then
-		local num = data.rnum + (fields.prev_recipe and -1 or 1)
-		data.rnum = data.recipes[num] and num or (fields.prev_recipe and #data.recipes or 1)
-		data.export_rcp = nil
-		data.scrbar_rcp = 1
-
-	elseif fields.prev_usage or fields.next_usage then
-		local num = data.unum + (fields.prev_usage and -1 or 1)
-		data.unum = data.usages[num] and num or (fields.prev_usage and #data.usages or 1)
-		data.export_usg = nil
-		data.scrbar_usg = 1
-
-	elseif fields.fav then
-		local fav = is_fav(data)
-
-		if #data.favs < i3.settings.max_favs and not fav then
-			insert(data.favs, data.query_item)
-		elseif fav then
-			remove(data.favs, fav)
-		end
-
-	elseif fields.export_rcp or fields.export_usg then
-		if fields.export_rcp then
-			data.export_rcp = not data.export_rcp
-
-			if not data.export_rcp then
-				data.scrbar_rcp = 1
-			end
-		else
-			data.export_usg = not data.export_usg
-
-			if not data.export_usg then
-				data.scrbar_usg = 1
-			end
-		end
-
-	elseif (sb_rcp and sub(sb_rcp, 1, 3) == "CHG") or (sb_usg and sub(sb_usg, 1, 3) == "CHG") then
-		data.scrbar_rcp = sb_rcp and tonumber(match(sb_rcp, "%d+"))
-		data.scrbar_usg = sb_usg and tonumber(match(sb_usg, "%d+"))
-
-	elseif fields.craft_rcp or fields.craft_usg then
-		craft_stack(player, data, fields.craft_rcp)
-
-		if fields.craft_rcp then
-			data.export_rcp = nil
-			data.scrbar_rcp = 1
-		else
-			data.export_usg = nil
-			data.scrbar_usg = 1
-		end
-	else
-		select_item(player, data, fields)
-	end
-end
-
-core.register_on_player_receive_fields(function(player, formname, fields)
-	local name = player:get_player_name()
-
-	if formname == "i3_outdated" then
-		return false, core.kick_player(name,
-			S"Come back when your Minetest client is up-to-date (www.minetest.net).")
-	elseif formname ~= "" then
-		return false
-	end
-
-	-- No-op buttons
-	if fields.player_name or fields.awards or fields.home_pos or fields.pagenum or
-	   fields.no_item or fields.no_rcp or fields.select_sorting or fields.sort_method or
-	   fields.bg_content then
-		return false
-	end
-
-	--print(dump(fields))
-	local data = i3.data[name]
-	if not data then return end
-
-	for f in pairs(fields) do
-		if sub(f, 1, 4) == "tab_" then
-			local tabname = sub(f, 5)
-			i3.set_tab(player, tabname)
-			break
-		elseif sub(f, 1, 5) == "itab_" then
-			data.pagenum = 1
-			data.itab = tonumber(f:sub(-1))
-			sort_by_category(data)
-			break
-		end
-	end
-
-	rcp_fields(player, data, fields)
-
-	local tab = i3.tabs[data.tab]
-
-	if tab and tab.fields then
-		return true, tab.fields(player, data, fields)
-	end
-
-	return true, set_fs(player)
-end)
-
-return inv_fields
+local set_fs = i3.set_fs
+
+IMPORT("vec_eq", "vec_round")
+IMPORT("reg_items", "reg_aliases")
+IMPORT("S", "random", "translate", "ItemStack")
+IMPORT("sort", "copy", "insert", "remove", "indexof")
+IMPORT("fmt", "find", "match", "sub", "lower", "split", "toupper")
+IMPORT("msg", "is_fav", "pos_to_str", "str_to_pos", "add_hud_waypoint", "play_sound", "reset_data")
+IMPORT("search", "get_sorting_idx", "sort_inventory", "sort_by_category", "get_recipes", "get_detached_inv")
+IMPORT("valid_item", "get_stack", "craft_stack", "clean_name", "compressible", "check_privs", "safe_teleport")
+
+local function inv_fields(player, data, fields)
+	local name = data.player_name
+	local inv = player:get_inventory()
+	local sb_inv = fields.scrbar_inv
+
+	if sb_inv and sub(sb_inv, 1, 3) == "CHG" then
+		data.scrbar_inv = tonumber(match(sb_inv, "%d+"))
+		return
+	end
+
+	if fields.drop_items then
+		local items = split(fields.drop_items, ",")
+		data.drop_items = items
+	end
+
+	for field in pairs(fields) do
+		if sub(field, 1, 4) == "btn_" then
+			data.subcat = indexof(i3.categories, sub(field, 5))
+			break
+
+		elseif sub(field, 1, 3) == "cb_" then
+			local str = sub(field, 4)
+			data[str] = false
+
+			if fields[field] == "true" then
+				data[str] = true
+			end
+
+		elseif sub(field, 1, 8) == "setting_" then
+			data.show_setting = match(field, "_(%w+)$")
+
+		elseif sub(field, 1, 9) == "skin_btn_" then
+			local id = tonumber(field:match("%d+"))
+			local _skins = skins.get_skinlist_for_player(name)
+			skins.set_player_skin(player, _skins[id])
+
+		elseif find(field, "waypoint_%d+") then
+			local id, action = match(field, "_(%d+)_(%w+)$")
+			      id = tonumber(id)
+			local waypoint = data.waypoints[id]
+			if not waypoint then return end
+
+			if action == "see" then
+				if data.waypoint_see and data.waypoint_see == id then
+					data.waypoint_see = nil
+				else
+					data.waypoint_see = id
+				end
+
+			elseif action == "delete" then
+				player:hud_remove(waypoint.id)
+				remove(data.waypoints, id)
+
+			elseif action == "teleport" then
+				local pos = str_to_pos(waypoint.pos)
+				safe_teleport(player, pos)
+				msg(name, S("Teleported to: @1", waypoint.name))
+
+			elseif action == "refresh" then
+				local color = random(0xffffff)
+				waypoint.color = color
+				player:hud_change(waypoint.id, "number", color)
+
+			elseif action == "hide" then
+				if waypoint.hide then
+					local new_id = add_hud_waypoint(
+						player, waypoint.name, str_to_pos(waypoint.pos), waypoint.color)
+
+					waypoint.id = new_id
+					waypoint.hide = nil
+				else
+					player:hud_remove(waypoint.id)
+					waypoint.hide = true
+				end
+			end
+
+			break
+		end
+	end
+
+	if fields.quit then
+		data.confirm_trash = nil
+		data.show_settings = nil
+		data.waypoint_see = nil
+		data.bag_rename = nil
+
+		if data.filter == "" then
+			data.enable_search = nil
+		end
+
+	elseif fields.trash then
+		data.show_settings = nil
+		data.confirm_trash = true
+
+	elseif fields.settings then
+		if not data.show_settings then
+			data.confirm_trash = nil
+			data.show_settings = true
+		else
+			data.show_settings = nil
+		end
+
+	elseif fields.confirm_trash_yes or fields.confirm_trash_no then
+		if fields.confirm_trash_yes then
+			inv:set_list("main", {})
+			inv:set_list("craft", {})
+		end
+
+		data.confirm_trash = nil
+
+	elseif fields.close_settings then
+		data.show_settings = nil
+
+	elseif fields.close_preview then
+		data.waypoint_see = nil
+
+	elseif fields.sort then
+		sort_inventory(player, data)
+
+	elseif fields.prev_sort or fields.next_sort then
+		local idx = get_sorting_idx(data.sort)
+		local tot = #i3.sorting_methods
+
+		idx -= (fields.prev_sort and 1 or -1)
+
+		if idx > tot then
+			idx = 1
+		elseif idx == 0 then
+			idx = tot
+		end
+
+		data.sort = i3.sorting_methods[idx].name
+
+	elseif fields.home then
+		if not data.home then
+			return msg(name, "No home set")
+		elseif not check_privs(name, {home = true}) then
+			return msg(name, "'home' privilege missing")
+		end
+
+		safe_teleport(player, str_to_pos(data.home))
+		msg(name, S"Welcome back home!")
+
+	elseif fields.set_home then
+		data.home = pos_to_str(player:get_pos(), 1)
+
+	elseif fields.bag_rename then
+		data.bag_rename = true
+
+	elseif fields.confirm_rename then
+		local bag = get_detached_inv("bag", name)
+		local bagstack = bag:get_stack("main", 1)
+		local meta = bagstack:get_meta()
+		local desc = translate(data.lang_code, bagstack:get_description())
+		local fill = split(desc, "(")[2]
+		local newname = fields.bag_newname:gsub("([%(%)])", "")
+		      newname = toupper(newname:trim())
+
+		if fill then
+			newname = fmt("%s (%s", newname, fill)
+		end
+
+		meta:set_string("description", newname)
+		bag:set_stack("main", 1, bagstack)
+
+		data.bag = bagstack:to_string()
+		data.bag_rename = nil
+
+	elseif fields.waypoint_add then
+		local max_waypoints = i3.settings.max_waypoints
+
+		if #data.waypoints >= max_waypoints then
+			play_sound(name, "i3_cannot", 0.8)
+			return msg(name, fmt("Waypoints limit reached (%u)", max_waypoints))
+		end
+
+		local pos = player:get_pos()
+
+		for _, v in ipairs(data.waypoints) do
+			if vec_eq(vec_round(pos), vec_round(str_to_pos(v.pos))) then
+				play_sound(name, "i3_cannot", 0.8)
+				return msg(name, S"You already set a waypoint at this position")
+			end
+		end
+
+		local waypoint = fields.waypoint_name
+
+		if fields.waypoint_name == "" then
+			waypoint = "Waypoint"
+		end
+
+		local color = random(0xffffff)
+		local id = add_hud_waypoint(player, waypoint, pos, color)
+
+		insert(data.waypoints, {
+			name  = waypoint,
+			pos   = pos_to_str(pos, 1),
+			color = color,
+			id    = id,
+		})
+
+		data.scrbar_inv += 1000
+
+	elseif fields.hide_debug_grid then
+		data.hide_debug_grid = not data.hide_debug_grid
+	end
+
+	return set_fs(player)
+end
+
+local function select_item(player, data, fields)
+	local item
+
+	for field in pairs(fields) do
+		if find(field, ":") then
+			item = field
+			break
+		end
+	end
+
+	if not item then return end
+
+	if compressible(item, data) then
+		local idx
+
+		for i = 1, #data.items do
+			local it = data.items[i]
+			if it == item then
+				idx = i
+				break
+			end
+		end
+
+		if data.expand ~= "" then
+			data.alt_items = nil
+
+			if item == data.expand then
+				data.expand = nil
+				return
+			end
+		end
+
+		if idx and item ~= data.expand then
+			data.alt_items = copy(data.items)
+			data.expand = item
+
+			if i3.compress_groups[item] then
+				local items = copy(i3.compress_groups[item])
+				insert(items, fmt("_%s", item))
+
+				sort(items, function(a, b)
+					if a:sub(1, 1) == "_" then
+						a = a:sub(2)
+					end
+
+					return a < b
+				end)
+
+				local i = 1
+
+				for _, v in ipairs(items) do
+					if valid_item(reg_items[clean_name(v)]) then
+						insert(data.alt_items, idx + i, v)
+						i++
+					end
+				end
+			end
+		end
+	else
+		if sub(item, 1, 1) == "_" then
+			item = sub(item, 2)
+		elseif sub(item, 1, 6) == "group!" then
+			item = match(item, "([%w:_]+)$")
+		end
+
+		item = reg_aliases[item] or item
+		if not reg_items[item] then return end
+
+		if core.is_creative_enabled(data.player_name) then
+			local stack = ItemStack(item)
+			local stackmax = stack:get_stack_max()
+			      stack = fmt("%s %s", item, stackmax)
+
+			return get_stack(player, stack)
+		end
+
+		if item == data.query_item then return end
+		local recipes, usages = get_recipes(player, item)
+
+		data.query_item = item
+		data.recipes    = recipes
+		data.usages     = usages
+		data.rnum       = 1
+		data.unum       = 1
+		data.scrbar_rcp = 1
+		data.scrbar_usg = 1
+		data.export_rcp = nil
+		data.export_usg = nil
+	end
+end
+
+local function rcp_fields(player, data, fields)
+	local sb_rcp, sb_usg = fields.scrbar_rcp, fields.scrbar_usg
+
+	if data.filter == "" then
+		data.enable_search = nil
+	end
+
+	if fields.cancel then
+		reset_data(data)
+
+	elseif fields.exit then
+		data.query_item = nil
+
+	elseif fields.enable_search then
+		data.enable_search = true
+		return set_fs(player)
+
+	elseif fields.filter and (fields.key_enter_field == "filter" or fields.search) then
+		if fields.filter == "" then
+			reset_data(data)
+			return set_fs(player)
+		end
+
+		local str = lower(fields.filter)
+		if data.filter == str then return end
+
+		data.filter = str
+		data.pagenum = 1
+
+		search(data)
+
+		if data.itab > 1 then
+			sort_by_category(data)
+		end
+
+	elseif fields.prev_page or fields.next_page then
+		if data.pagemax == 1 then return end
+		data.pagenum -= (fields.prev_page and 1 or -1)
+
+		if data.pagenum > data.pagemax then
+			data.pagenum = 1
+		elseif data.pagenum == 0 then
+			data.pagenum = data.pagemax
+		end
+
+	elseif fields.prev_skin or fields.next_skin then
+		if data.skin_pagemax == 1 then return end
+		data.skin_pagenum -= (fields.prev_skin and 1 or -1)
+
+		if data.skin_pagenum > data.skin_pagemax then
+			data.skin_pagenum = 1
+		elseif data.skin_pagenum == 0 then
+			data.skin_pagenum = data.skin_pagemax
+		end
+
+	elseif fields.prev_recipe or fields.next_recipe then
+		local num = data.rnum + (fields.prev_recipe and -1 or 1)
+		data.rnum = data.recipes[num] and num or (fields.prev_recipe and #data.recipes or 1)
+		data.export_rcp = nil
+		data.scrbar_rcp = 1
+
+	elseif fields.prev_usage or fields.next_usage then
+		local num = data.unum + (fields.prev_usage and -1 or 1)
+		data.unum = data.usages[num] and num or (fields.prev_usage and #data.usages or 1)
+		data.export_usg = nil
+		data.scrbar_usg = 1
+
+	elseif fields.fav then
+		local fav = is_fav(data)
+
+		if #data.favs < i3.settings.max_favs and not fav then
+			insert(data.favs, data.query_item)
+		elseif fav then
+			remove(data.favs, fav)
+		end
+
+	elseif fields.export_rcp or fields.export_usg then
+		if fields.export_rcp then
+			data.export_rcp = not data.export_rcp
+
+			if not data.export_rcp then
+				data.scrbar_rcp = 1
+			end
+		else
+			data.export_usg = not data.export_usg
+
+			if not data.export_usg then
+				data.scrbar_usg = 1
+			end
+		end
+
+	elseif (sb_rcp and sub(sb_rcp, 1, 3) == "CHG") or (sb_usg and sub(sb_usg, 1, 3) == "CHG") then
+		data.scrbar_rcp = sb_rcp and tonumber(match(sb_rcp, "%d+"))
+		data.scrbar_usg = sb_usg and tonumber(match(sb_usg, "%d+"))
+
+	elseif fields.craft_rcp or fields.craft_usg then
+		craft_stack(player, data, fields.craft_rcp)
+
+		if fields.craft_rcp then
+			data.export_rcp = nil
+			data.scrbar_rcp = 1
+		else
+			data.export_usg = nil
+			data.scrbar_usg = 1
+		end
+	else
+		select_item(player, data, fields)
+	end
+end
+
+core.register_on_player_receive_fields(function(player, formname, fields)
+	local name = player:get_player_name()
+
+	if formname == "i3_outdated" then
+		return false, core.kick_player(name,
+			S"Come back when your Minetest client is up-to-date (www.minetest.net).")
+	elseif formname ~= "" then
+		return false
+	end
+
+	-- No-op buttons
+	if fields.player_name or fields.awards or fields.home_pos or fields.pagenum or
+	   fields.no_item or fields.no_rcp or fields.select_sorting or fields.sort_method or
+	   fields.bg_content then
+		return false
+	end
+
+	--print(dump(fields))
+	local data = i3.data[name]
+	if not data then return end
+
+	for f in pairs(fields) do
+		if sub(f, 1, 4) == "tab_" then
+			local tabname = sub(f, 5)
+			i3.set_tab(player, tabname)
+			break
+		elseif sub(f, 1, 5) == "itab_" then
+			data.pagenum = 1
+			data.itab = tonumber(f:sub(-1))
+			sort_by_category(data)
+			break
+		end
+	end
+
+	rcp_fields(player, data, fields)
+
+	local tab = i3.tabs[data.tab]
+
+	if tab and tab.fields then
+		return true, tab.fields(player, data, fields)
+	end
+
+	return true, set_fs(player)
+end)
+
+return inv_fields

src/groups.lua

@@ -11,6 +11,7 @@ i3.group_stereotypes = {
 	stone = "default:stone",
 	leaves = "default:leaves",
 	coal = "default:coal_lump",
+	fence = "default:fence_wood",
 	vessel = "vessels:glass_bottle",
 	flower = "flowers:dandelion_yellow",
 	water_bucket = "bucket:bucket_water",
@@ -26,6 +27,7 @@ i3.group_names = {
 	glass = S"Any glass",
 	stick = S"Any stick",
 	stone = S"Any stone",
+	fence = S"Any fence",
 	carpet = S"Any carpet",
 	flower = S"Any flower",
 	leaves = S"Any leaves",

src/gui.lua

@@ -13,12 +13,12 @@ IMPORT("vec_new", "vec_sub", "vec_round")
 IMPORT("clr", "ESC", "msg", "check_privs")
 IMPORT("min", "max", "floor", "ceil", "round")
 IMPORT("reg_items", "reg_tools", "reg_entities")
-IMPORT("get_bag_description", "get_detached_inv")
-IMPORT("S", "ES", "translate", "ItemStack", "toupper")
-IMPORT("groups_to_items", "compression_active", "compressible")
-IMPORT("true_str", "is_fav", "is_num", "get_group", "str_to_pos")
+IMPORT("true_str", "is_fav", "is_num", "str_to_pos")
+IMPORT("get_sorting_idx", "compression_active", "compressible")
+IMPORT("get_bag_description", "get_detached_inv", "get_recipes")
+IMPORT("S", "ES", "translate", "ItemStack", "toupper", "utf8_len")
 IMPORT("maxn", "sort", "concat", "copy", "insert", "remove", "unpack")
-IMPORT("get_sorting_idx", "is_group", "extract_groups", "item_has_groups", "get_recipes")
+IMPORT("extract_groups", "groups_to_items", "is_group", "item_has_groups", "get_group")
 
 local function fmt(elem, ...)
 	if not fs_elements[elem] then
@@ -38,7 +38,7 @@ local function weird_desc(str)
 end
 
 local function snip(str, limit)
-	return #str > limit and fmt("%s...", sub(str, 1, limit - 3)) or str
+	return fmt("%s...", sub(str, 1, limit - 3))
 end
 
 local function get_desc(item)
@@ -93,7 +93,8 @@ local function get_stack_max(inv, data, is_recipe, rcp)
 					local def = reg_items[item]
 
 					if def then
-						local groups = extract_groups(name)
+						local group_cache = i3.groups[name:sub(7)]
+						local groups = group_cache and group_cache.groups or extract_groups(name)
 
 						if item_has_groups(def.groups, groups) then
 							counts_inv[name] = (counts_inv[name] or 0) + count
@@ -131,7 +132,7 @@ local function get_inv_slots(fs)
 	fs"style_type[box;colors=#77777710,#77777710,#777,#777]"
 
 	for i = 0, hotbar_len - 1 do
-		fs("box", i * size + inv_x + (i * spacing), inv_y, size, size, "")
+		box(i * size + inv_x + (i * spacing), inv_y, size, size, "")
 	end
 
 	fs(fmt("style_type[list;size=%f;spacing=%f]", size, spacing),
@@ -147,10 +148,10 @@ end
 
 local function add_subtitle(fs, name, y, ctn_len, font_size, sep, label)
 	fs(fmt("style[%s;font=bold;font_size=%u]", name, font_size))
-	fs("button", 0, y, ctn_len, 0.5, name, ESC(label))
+	button(0, y, ctn_len, 0.5, name, ESC(label))
 
 	if sep then
-		fs("image", 0, y + 0.55, ctn_len, 0.035, PNG.bar)
+		image(0, y + 0.55, ctn_len, 0.035, PNG.bar)
 	end
 end
 
@@ -174,11 +175,11 @@ local function get_award_list(data, fs, ctn_len, yextra, award_list, awards_unlo
 		local desc_lim, _desc = 39
 		local icon_size = 1.1
 
-		if #title > title_lim then
+		if utf8_len(title) > title_lim then
 			_title = snip(title, title_lim)
 		end
 
-		if #desc > desc_lim then
+		if utf8_len(desc) > desc_lim then
 			_desc = snip(desc, desc_lim)
 		end
 
@@ -295,14 +296,14 @@ local function get_isometric_view(fs, pos, X, Y, t, cubes, depth, high)
 	end
 
 	shift += (base_depth and 0.45 or 0.95)
-	fs("image", 2.7, Y + shift, 0.3, 0.3, PNG.flag)
+	image(2.7, Y + shift, 0.3, 0.3, PNG.flag)
 end
 
 local function get_waypoint_fs(fs, data, player, yextra, ctn_len)
 	fs(fmt("box[0,%f;4.9,0.6;#bababa25]", yextra + 1.1))
-	fs("label", 0, yextra + 0.85, ES"Waypoint name:")
+	label(0, yextra + 0.85, ES"Waypoint name:")
 	fs(fmt("field[0.1,%f;4.8,0.6;waypoint_name;;]", yextra + 1.1))
-	fs("image_button", 5.1, yextra + 1.15, 0.5, 0.5, "", "waypoint_add", "")
+	image_button(5.1, yextra + 1.15, 0.5, 0.5, "", "waypoint_add", "")
 	fs(fmt("tooltip[waypoint_add;%s]", ES"Add waypoint"))
 
 	if #data.waypoints == 0 then return end
@@ -313,11 +314,11 @@ local function get_waypoint_fs(fs, data, player, yextra, ctn_len)
 		local icon_size, yi = 0.35, y + 0.12
 
 		fs"style_type[box;colors=#bababa30,#bababa30,#bababa05,#bababa05]"
-		fs("box", 0, y, ctn_len, 0.6, "")
+		box(0, y, ctn_len, 0.6, "")
 
 		local waypoint_name, lim = v.name, 18
 
-		if #v.name > lim then
+		if utf8_len(v.name) > lim then
 			waypoint_name = snip(waypoint_name, lim)
 		end
 
@@ -330,7 +331,7 @@ local function get_waypoint_fs(fs, data, player, yextra, ctn_len)
 		local teleport_priv = check_privs(player, {teleport = true})
 		local waypoint_preview = data.waypoint_see and data.waypoint_see == i
 
-		fs("label", 0.15, y + 0.33, clr(fmt("#%s", hex), waypoint_name))
+		label(0.15, y + 0.33, clr(fmt("#%s", hex), waypoint_name))
 
 		local tooltip = fmt("Name: %s\nPosition:%s", clr("#dbeeff", v.name),
 				v.pos:sub(2,-2):gsub("(%-*%d*%.?%d+)", clr("#dbeeff", " %1")))
@@ -339,38 +340,38 @@ local function get_waypoint_fs(fs, data, player, yextra, ctn_len)
 			tooltip = fmt("%s\n%s", tooltip, clr("#ff0", ES"[Click to teleport]"))
 		end
 
-		fs("tooltip", 0, y, ctn_len - 2.1, 0.65, tooltip)
+		tooltip(0, y, ctn_len - 2.1, 0.65, tooltip)
 
 		local del = fmt("waypoint_%u_delete", i)
 		fs(fmt("style[%s;fgimg=%s;fgimg_hovered=%s;content_offset=0]", del, PNG.trash, PNG.trash_hover))
-		fs("image_button", ctn_len - 0.5, yi, icon_size, icon_size, "", del, "")
+		image_button(ctn_len - 0.5, yi, icon_size, icon_size, "", del, "")
 		fs(fmt("tooltip[%s;%s]", del, ES"Remove waypoint"))
 
 		local rfs = fmt("waypoint_%u_refresh", i)
 		fs(fmt("style[%s;fgimg=%s;fgimg_hovered=%s;content_offset=0]", rfs, PNG.refresh, PNG.refresh_hover))
-		fs("image_button", ctn_len - 1, yi, icon_size, icon_size, "", rfs, "")
+		image_button(ctn_len - 1, yi, icon_size, icon_size, "", rfs, "")
 		fs(fmt("tooltip[%s;%s]", rfs, ES"Change color"))
 
 		local see = fmt("waypoint_%u_see", i)
 		fs(fmt("style[%s;fgimg=%s;fgimg_hovered=%s;content_offset=0]",
 			see, waypoint_preview and PNG.search_hover or PNG.search, PNG.search, PNG.search_hover))
-		fs("image_button", ctn_len - 1.5, yi, icon_size, icon_size, "", see, "")
+		image_button(ctn_len - 1.5, yi, icon_size, icon_size, "", see, "")
 		fs(fmt("tooltip[%s;%s]", see, ES"Preview the waypoint area"))
 
 		local vsb = fmt("waypoint_%u_hide", i)
 		fs(fmt("style[%s;fgimg=%s;content_offset=0]", vsb, v.hide and PNG.nonvisible or PNG.visible))
-		fs("image_button", ctn_len - 2, yi, icon_size, icon_size, "", vsb, "")
+		image_button(ctn_len - 2, yi, icon_size, icon_size, "", vsb, "")
 		fs(fmt("tooltip[%s;%s]", vsb, v.hide and ES"Show waypoint" or ES"Hide waypoint"))
 
 		if teleport_priv then
 			local tp = fmt("waypoint_%u_teleport", i)
-			fs("button", 0, y, ctn_len - 2.1, 0.6, tp, "")
+			button(0, y, ctn_len - 2.1, 0.6, tp, "")
 		end
 
 		if waypoint_preview then
-			fs("image", 0.25, y - 3.5, 5, 4, PNG.bg_content)
-			fs("button", 0.25, y - 3.35, 5, 0.55, "area_preview", v.name)
-			fs("image_button", 4.65, y - 3.25, 0.25, 0.25,
+			image(0.25, y - 3.5, 5, 4, PNG.bg_content)
+			button(0.25, y - 3.35, 5, 0.55, "area_preview", v.name)
+			image_button(4.65, y - 3.25, 0.25, 0.25,
 				PNG.cancel_hover .. "^\\[brighten", "close_preview", "")
 
 			local pos = str_to_pos(data.waypoints[i].pos)
@@ -392,20 +393,20 @@ local function get_bag_fs(fs, data, name, esc_name, bag_size, yextra)
 	local bagstack = bag:get_stack("main", 1)
 	local desc = ESC(get_bag_description(data, bagstack))
 
-	fs("image", 0.5, yextra + 1.85, 0.6, 0.6, PNG.arrow_content)
+	image(0.5, yextra + 1.85, 0.6, 0.6, PNG.arrow_content)
 	fs(fmt("style[bg_content;bgimg=%s;fgimg=i3_blank.png;bgimg_middle=10,%u;sound=]", PNG.bg_content, m))
-	fs("image_button", 1.1, yextra + 0.5 + (yy or 0), 4.75, h, "", "bg_content", "")
+	image_button(1.1, yextra + 0.5 + (yy or 0), 4.75, h, "", "bg_content", "")
 
 	if not data.bag_rename then
-		fs("hypertext", 1.3, yextra + 0.8, 4.3, 0.6, "content",
+		hypertext(1.3, yextra + 0.8, 4.3, 0.6, "content",
 			fmt("<global size=16><center><b>%s</b></center>", desc))
-		fs("image_button", 5.22, yextra + 0.835, 0.25, 0.25, "", "bag_rename", "")
+		image_button(5.22, yextra + 0.835, 0.25, 0.25, "", "bag_rename", "")
 		fs(fmt("tooltip[%s;%s]", "bag_rename", ES"Rename the bag"))
 	else
-		fs("box", 1.7, yextra + 0.82, 2.6, 0.4, "#707070")
+		box(1.7, yextra + 0.82, 2.6, 0.4, "#707070")
 		fs(fmt("field[1.8,%f;2.5,0.4;bag_newname;;%s]", yextra + 0.82, desc),
 		   "field_close_on_enter[bag_newname;false]")
-		fs("hypertext", 4.4, yextra + 0.88, 0.8, 0.6, "confirm_rename",
+		hypertext(4.4, yextra + 0.88, 0.8, 0.6, "confirm_rename",
 			fmt("<global size=16><tag name=action color=#fff hovercolor=%s>" ..
 				"<center><b><action name=ok>OK</action></b></center>", colors.yellow))
 	end
@@ -435,12 +436,12 @@ local function get_container(fs, data, player, yoffset, ctn_len, award_list, awa
 		local heart_x, heart_h = 0.65, yoffset + 0.75
 
 		for i = 1, 10 do
-			fs("image", heart_x + ((i - 1) * (heart_size + 0.1)), heart_h,
+			image(heart_x + ((i - 1) * (heart_size + 0.1)), heart_h,
 				heart_size, heart_size, PNG.heart_grey)
 		end
 
 		for i = 1, hearts do
-			fs("image", heart_x + ((i - 1) * (heart_size + 0.1)), heart_h,
+			image(heart_x + ((i - 1) * (heart_size + 0.1)), heart_h,
 				heart_size, heart_size,
 				(half == 1 and i == floor(hearts)) and PNG.heart_half or PNG.heart)
 		end
@@ -449,10 +450,10 @@ local function get_container(fs, data, player, yoffset, ctn_len, award_list, awa
 	end
 
 	fs(fmt("list[current_player;craft;%f,%f;3,3;]", 0, yoffset + 1.45))
-	fs("image", 3.47, yoffset + 2.69, 0.85, 0.85, PNG.arrow)
+	image(3.47, yoffset + 2.69, 0.85, 0.85, PNG.arrow)
 	fs(fmt("list[current_player;craftpreview;%f,%f;1,1;]", 4.45, yoffset + 2.6),
 	   fmt("list[detached:i3_trash;main;%f,%f;1,1;]", 4.45, yoffset + 3.75))
-	fs("image", 4.45, yoffset + 3.75, 1, 1, PNG.trash)
+	image(4.45, yoffset + 3.75, 1, 1, PNG.trash)
 
 	local yextra = damage_enabled and 5.5 or 5
 
@@ -461,15 +462,15 @@ local function get_container(fs, data, player, yoffset, ctn_len, award_list, awa
 		fs(fmt("style[btn_%s;fgimg=%s;fgimg_hovered=%s;content_offset=0]", title,
 			data.subcat == i and PNG[fmt("%s_hover", title)] or PNG[title],
 			PNG[fmt("%s_hover", title)]))
-		fs("image_button", 0.25 + ((i - 1) * 1.18), yextra - 0.2, 0.5, 0.5, "", btn_name, "")
+		image_button(0.25 + ((i - 1) * 1.18), yextra - 0.2, 0.5, 0.5, "", btn_name, "")
 		fs(fmt("tooltip[%s;%s]", btn_name, title:gsub("^%l", upper)))
 	end
 
-	fs("box", 0, yextra + 0.45, ctn_len, 0.045, "#bababa50")
-	fs("box", (data.subcat - 1) * 1.18, yextra + 0.45, 1, 0.045, "#f9826c")
+	box(0, yextra + 0.45, ctn_len, 0.045, "#bababa50")
+	box((data.subcat - 1) * 1.18, yextra + 0.45, 1, 0.045, "#f9826c")
 
 	local function not_installed(modname)
-		fs("hypertext", 0, yextra + 0.9, ctn_len, 0.6, "not_installed",
+		hypertext(0, yextra + 0.9, ctn_len, 0.6, "not_installed",
 			fmt("<global size=16><center><style color=%s font=mono>%s</style> not installed</center>",
 				colors.blue, modname))
 	end
@@ -484,8 +485,8 @@ local function get_container(fs, data, player, yoffset, ctn_len, award_list, awa
 
 		local armor_def = armor.def[name]
 		fs(fmt("list[detached:%s_armor;armor;0,%f;3,2;]", esc_name, yextra + 0.7))
-		fs("label", 3.65, yextra + 1.55, fmt("%s: %s", ES"Level", armor_def.level))
-		fs("label", 3.65, yextra + 2.05, fmt("%s: %s", ES"Heal", armor_def.heal))
+		label(3.65, yextra + 1.55, fmt("%s: %s", ES"Level", armor_def.level))
+		label(3.65, yextra + 2.05, fmt("%s: %s", ES"Heal", armor_def.heal))
 
 	elseif data.subcat == 3 then
 		if not i3.modules.skins then
@@ -494,17 +495,21 @@ local function get_container(fs, data, player, yoffset, ctn_len, award_list, awa
 
 		local _skins = skins.get_skinlist_for_player(name)
 		local skin_name = skins.get_player_skin(player).name
-		local btn_y = yextra + 0.75
-		local spp = 24
+		local spp, add_y = 24, 0
 
-		data.skin_pagemax = max(1, ceil(#_skins / spp))
+		if #_skins > spp then
+			local btn_y = yextra + 0.75
+			add_y += 0.6
 
-		fs("image_button", 1.5, btn_y, 0.35, 0.35, "", "prev_skin", "")
-		fs("image_button", 3.85, btn_y, 0.35, 0.35, "", "next_skin", "")
+			data.skin_pagemax = max(1, ceil(#_skins / spp))
 
-		fs"style[skin_page;font=bold;font_size=18]"
-		fs("button", 1.85, btn_y - 0.23, 2, 0.8, "skin_page",
-			fmt("%s / %u", clr(colors.yellow, data.skin_pagenum), data.skin_pagemax))
+			image_button(1.5, btn_y, 0.35, 0.35, "", "prev_skin", "")
+			image_button(3.85, btn_y, 0.35, 0.35, "", "next_skin", "")
+
+			fs"style[skin_page;font=bold;font_size=18]"
+			button(1.85, btn_y - 0.23, 2, 0.8, "skin_page",
+				fmt("%s / %u", clr(colors.yellow, data.skin_pagenum), data.skin_pagemax))
+		end
 
 		local first = (data.skin_pagenum - 1) * spp
 		local last = first + spp - 1
@@ -523,9 +528,9 @@ local function get_container(fs, data, player, yoffset, ctn_len, award_list, awa
 			local X = (i % 3) * 1.93
 
 			local Y = ceil((i % spp - X) / 3 + 1)
-			      Y += (Y * 2.45) + yextra - 2.15
+			      Y += (Y * 2.45) + yextra - 2.75 + add_y
 
-			fs("image_button", X, Y, 1.86, 3.4, "", btn_name, "")
+			image_button(X, Y, 1.86, 3.4, "", btn_name, "")
 			fs(fmt("tooltip[%s;%s]", btn_name, ESC(skin.name)))
 		end
 
@@ -547,25 +552,25 @@ local function show_popup(fs, data)
 		fs"style_type[box;colors=#999,#999,#808080,#808080]"
 
 		for _ = 1, 3 do
-			fs("box", 2.97, 10.75, 4.3, 0.5, "")
+			box(2.97, 10.75, 4.3, 0.5, "")
 		end
 
-		fs("label", 3.12, 11, "Confirm trash?")
-		fs("image_button", 5.17, 10.75, 1, 0.5, "", "confirm_trash_yes", "Yes")
-		fs("image_button", 6.27, 10.75, 1, 0.5, "", "confirm_trash_no", "No")
+		label(3.12, 11, "Confirm trash?")
+		image_button(5.17, 10.75, 1, 0.5, "", "confirm_trash_yes", "Yes")
+		image_button(6.27, 10.75, 1, 0.5, "", "confirm_trash_no", "No")
 
 	elseif data.show_settings then
 		fs"style_type[box;colors=#999,#999,#808080,#808080]"
 
 		for _ = 1, 3 do
-			fs("box", 2.1, 9.25, 6, 2, "")
+			box(2.1, 9.25, 6, 2, "")
 		end
 
 		for _ = 1, 3 do
-			fs("box", 2.1, 9.25, 6, 0.5, "#707070")
+			box(2.1, 9.25, 6, 0.5, "#707070")
 		end
 
-		fs("image_button", 7.75, 9.35, 0.25, 0.25, PNG.cancel_hover .. "^\\[brighten", "close_settings", "")
+		image_button(7.75, 9.35, 0.25, 0.25, PNG.cancel_hover .. "^\\[brighten", "close_settings", "")
 
 		local show_home = data.show_setting == "home"
 		local show_sorting = data.show_setting == "sorting"
@@ -578,9 +583,9 @@ local function show_popup(fs, data)
 		   fmt("style[setting_misc;textcolor=%s;font=bold;sound=i3_click]",
 			show_misc and colors.yellow or "#fff"))
 
-		fs("button", 2.2, 9.25, 1.8, 0.55, "setting_home", "Home")
-		fs("button", 4,   9.25, 1.8, 0.55, "setting_sorting", "Sorting")
-		fs("button", 5.8, 9.25, 1.8, 0.55, "setting_misc", "Misc.")
+		button(2.2, 9.25, 1.8, 0.55, "setting_home", "Home")
+		button(4,   9.25, 1.8, 0.55, "setting_sorting", "Sorting")
+		button(5.8, 9.25, 1.8, 0.55, "setting_misc", "Misc.")
 
 		if show_home then
 			local coords, c, str = {"X", "Y", "Z"}, 0, ES"No home set"
@@ -594,17 +599,17 @@ local function show_popup(fs, data)
 					end)
 			end
 
-			fs("hypertext", 2.1, 9.9, 6, 0.6, "home_pos", fmt("<global size=16><center>%s</center>", str))
-			fs("image_button", 4.2, 10.4, 1.8, 0.7, "", "set_home", "Set home")
+			hypertext(2.1, 9.9, 6, 0.6, "home_pos", fmt("<global size=16><center>%s</center>", str))
+			image_button(4.2, 10.4, 1.8, 0.7, "", "set_home", "Set home")
 
 		elseif show_sorting then
-			fs("button", 2.1, 9.7, 6, 0.8, "select_sorting", ES"Select the inventory sorting method:")
+			button(2.1, 9.7, 6, 0.8, "select_sorting", ES"Select the inventory sorting method:")
 
-			fs("image_button", 2.2, 10.6, 0.35, 0.35, "",  "prev_sort", "")
-			fs("image_button", 7.65, 10.6, 0.35, 0.35, "", "next_sort", "")
+			image_button(2.2, 10.6, 0.35, 0.35, "",  "prev_sort", "")
+			image_button(7.65, 10.6, 0.35, 0.35, "", "next_sort", "")
 
 			fs"style[sort_method;font=bold;font_size=20]"
-			fs("button", 2.55, 10.36, 5.1, 0.8, "sort_method", toupper(data.sort))
+			button(2.55, 10.36, 5.1, 0.8, "sort_method", toupper(data.sort))
 
 			local idx = get_sorting_idx(data.sort)
 			local desc = i3.sorting_methods[idx].description
@@ -614,13 +619,13 @@ local function show_popup(fs, data)
 			end
 
 		elseif show_misc then
-			fs("checkbox", 2.4, 10.05, "cb_inv_compress", "Compression", tostring(data.inv_compress))
-			fs("checkbox", 2.4, 10.5,  "cb_reverse_sorting", "Reverse mode", tostring(data.reverse_sorting))
-			fs("checkbox", 2.4, 10.95, "cb_ignore_hotbar", "Ignore hotbar", tostring(data.ignore_hotbar))
-			fs("checkbox", 5.4, 10.05, "cb_auto_sorting", "Automation", tostring(data.auto_sorting))
+			checkbox(2.4, 10.05, "cb_inv_compress", "Compression", tostring(data.inv_compress))
+			checkbox(2.4, 10.5,  "cb_reverse_sorting", "Reverse mode", tostring(data.reverse_sorting))
+			checkbox(2.4, 10.95, "cb_ignore_hotbar", "Ignore hotbar", tostring(data.ignore_hotbar))
+			checkbox(5.4, 10.05, "cb_auto_sorting", "Automation", tostring(data.auto_sorting))
 
 			for _ = 1, 3 do
-				fs("box", 5.4, 10.68, 2.4, 0.45, "#707070")
+				box(5.4, 10.68, 2.4, 0.45, "#707070")
 			end
 
 			fs("style[drop_items;font_size=15;font=mono;textcolor=#dbeeff]",
@@ -663,12 +668,12 @@ local function get_inventory_fs(player, data, fs)
 		local textures = concat(t, ","):gsub("!", ",")
 
 		--fs("style[player_model;bgcolor=black]")
-		fs("model", 0.2, 0.2, armor_skin and 4 or 3.4, ctn_hgt,
+		model(0.2, 0.2, armor_skin and 4 or 3.4, ctn_hgt,
 			"player_model", props.mesh, textures, "0,-150", "false", "false",
 			fmt("%u,%u%s", anim.x, anim.y, data.fs_version >= 5 and ";30" or ""))
 	else
 		local size = 2.5
-		fs("image", 0.7, 0.2, size, size * props.visual_size.y, props.textures[1])
+		image(0.7, 0.2, size, size * props.visual_size.y, props.textures[1])
 	end
 
 	local awards_unlocked, award_list, award_list_nb = 0
@@ -688,9 +693,10 @@ local function get_inventory_fs(player, data, fs)
 	elseif i3.modules.skins and data.subcat == 3 then
 		local spp = 24
 		local _skins = skins.get_skinlist_for_player(data.player_name)
-		local num = max(1, min(spp, #_skins - ((data.skin_pagenum - 1) * spp)))
+		local nb = #_skins
+		local num = max(1, min(spp, nb - ((data.skin_pagenum - 1) * spp)))
 
-		max_val += ceil(num / 3) * 34
+		max_val += ceil(num / 3) * (nb > spp and 34 or 31)
 
 	elseif i3.modules.awards and data.subcat == 4 then
 		award_list = awards.get_award_states(data.player_name)
@@ -737,7 +743,7 @@ local function get_inventory_fs(player, data, fs)
 		local btn_name, tooltip = unpack(v)
 		fs(fmt("style[%s;fgimg=%s;fgimg_hovered=%s;content_offset=0]",
 			btn_name, PNG[btn_name], PNG[fmt("%s_hover", btn_name)]))
-		fs("image_button", i + 3.43 - (i * 0.4), 11.43, 0.35, 0.35, "", btn_name, "")
+		image_button(i + 3.43 - (i * 0.4), 11.43, 0.35, 0.35, "", btn_name, "")
 		fs(fmt("tooltip[%s;%s]", btn_name, tooltip))
 	end
 
@@ -824,7 +830,7 @@ local function get_tooltip(item, info, pos)
 	return fmt("tooltip[%s;%s]", item, ESC(tooltip))
 end
 
-local function get_output_fs(fs, data, rcp, is_recipe, shapeless, right, btn_size, _btn_size)
+local function get_output_fs(fs, data, rcp, is_recipe, shapeless, right, btn_size, btn_size2)
 	local custom_recipe = i3.craft_types[rcp.type]
 	local cooking = rcp.type == "cooking"
 	local fuel = rcp.type == "fuel"
@@ -833,7 +839,7 @@ local function get_output_fs(fs, data, rcp, is_recipe, shapeless, right, btn_siz
 		local icon, tooltip = PNG.blank
 
 		if custom_recipe and true_str(custom_recipe.icon) then
-			icon = fmt("%s^\\[resize:16x16", custom_recipe.icon)
+			icon = custom_recipe.icon
 		elseif shapeless then
 			icon = PNG.shapeless
 		end
@@ -842,9 +848,9 @@ local function get_output_fs(fs, data, rcp, is_recipe, shapeless, right, btn_siz
 		local pos_y = data.yoffset + 0.9
 
 		if cooking then
-			fs("animated_image", pos_x, pos_y, 0.5, 0.5, PNG.furnace_anim, 8, 180)
+			animated_image(pos_x, pos_y, 0.5, 0.5, PNG.furnace_anim, 8, 180)
 		else
-			fs("image", pos_x, pos_y, 0.5, 0.5, icon)
+			image(pos_x, pos_y, 0.5, 0.5, icon)
 		end
 
 		if custom_recipe and true_str(custom_recipe.description) then
@@ -856,19 +862,19 @@ local function get_output_fs(fs, data, rcp, is_recipe, shapeless, right, btn_siz
 		end
 
 		if tooltip then
-			fs("tooltip", pos_x, pos_y, 0.5, 0.5, ESC(tooltip))
+			tooltip(pos_x, pos_y, 0.5, 0.5, ESC(tooltip))
 		end
 	end
 
 	local BTN_SIZE = i3.settings.item_btn_size
-	local arrow_X = right + 0.2 + (_btn_size or BTN_SIZE)
+	local arrow_X = right + 0.2 + (btn_size2 or BTN_SIZE)
 	local X = arrow_X + 1.2
 	local Y = data.yoffset + 1.4
 
-	fs("image", arrow_X, Y + 0.06, 1, 1, PNG.arrow)
+	image(arrow_X, Y + 0.06, 1, 1, PNG.arrow)
 
 	if fuel then
-		fs("animated_image", X + 0.05, Y, BTN_SIZE, BTN_SIZE, PNG.fire_anim, 8, 180)
+		animated_image(X + 0.05, Y, BTN_SIZE, BTN_SIZE, PNG.fire_anim, 8, 180)
 		return
 	end
 
@@ -887,14 +893,14 @@ local function get_output_fs(fs, data, rcp, is_recipe, shapeless, right, btn_siz
 		fs(fmt("style_type[list;size=%f]", BTN_SIZE))
 		fs"listcolors[#bababa50;#bababa99]"
 		fs(fmt("list[detached:i3_output_%s_%s;main;%f,%f;1,1;]", rcp_usg, data.player_name, X + 0.11, Y))
-		fs("button",  X + 0.11, Y, BTN_SIZE, BTN_SIZE, _name, "")
+		button(X + 0.11, Y, BTN_SIZE, BTN_SIZE, _name, "")
 
 		local inv = get_detached_inv(fmt("output_%s", rcp_usg), data.player_name)
 		inv:set_stack("main", 1, item)
 		pos = {x = X + 0.11, y = Y}
 	else
-		fs("image", X, Y - 0.11, bt_s, bt_s, PNG.slot)
-		fs("item_image_button",
+		image(X, Y - 0.11, bt_s, bt_s, PNG.slot)
+		item_image_button(
 			X + 0.11, Y, BTN_SIZE, BTN_SIZE,
 			fmt("%s %u %u", name, count * (is_recipe and data.scrbar_rcp or data.scrbar_usg or 1), wear),
 			_name, "")
@@ -987,10 +993,12 @@ local function get_grid_fs(fs, data, rcp, is_recipe)
 		end
 
 		local groups
+		local group_cache = i3.groups[name:sub(7)]
 
 		if is_group(name) then
-			groups = extract_groups(name)
-			name = groups_to_items(groups)
+			groups = group_cache and group_cache.groups or extract_groups(name)
+			name = group_cache and (group_cache.stereotype or group_cache.items[1]) or
+				groups_to_items(groups)[1] or ""
 		end
 
 		local label = groups and "\nG" or ""
@@ -1018,14 +1026,26 @@ local function get_grid_fs(fs, data, rcp, is_recipe)
 		end
 
 		if not large_recipe then
-			fs("image", X, Y, btn_size, btn_size, PNG.slot)
+			image(X, Y, btn_size, btn_size, PNG.slot)
 		end
 
 		local btn_name = groups and fmt("group!%s!%s", groups[1], name) or name
+		local _count = count * (is_recipe and data.scrbar_rcp or data.scrbar_usg or 1)
 
-		fs("item_image_button", X, Y, btn_size, btn_size,
-			fmt("%s %u", name, count * (is_recipe and data.scrbar_rcp or data.scrbar_usg or 1)),
-			btn_name, label)
+		if group_cache and group_cache.sprite and not large_recipe then
+			local sprite = ESC(group_cache.sprite)
+			local size = btn_size - 0.02
+
+			item_image_button(X, Y, btn_size, btn_size, "", btn_name, "")
+			animated_image(X + 0.01, Y + 0.025, size, size, sprite, group_cache.count, 1500)
+			label(X + 0.45, Y + 0.18, label)
+
+			if _count > 1 then
+				label(X + 0.8, Y + 0.9, _count)
+			end
+		else
+			item_image_button(X, Y, btn_size, btn_size, fmt("%s %u", name, _count), btn_name, label)
+		end
 
 		local def = reg_items[name]
 		local unknown = not def or nil
@@ -1064,7 +1084,7 @@ local function get_rcp_lbl(fs, data, panel, rn, is_recipe)
 	local rcp = is_recipe and panel.rcp[data.rnum] or panel.rcp[data.unum]
 
 	if rcp.custom then
-		fs("hypertext", data.inv_width + 4.8, data.yoffset + 0.12, 3, 0.6, "custom_rcp",
+		hypertext(data.inv_width + 4.8, data.yoffset + 0.12, 3, 0.6, "custom_rcp",
 			fmt("<global size=16><right><i>%s</i></right>", ES"Custom recipe"))
 	end
 
@@ -1077,7 +1097,7 @@ local function get_rcp_lbl(fs, data, panel, rn, is_recipe)
 	local one = rn == 1
 	local y = data.yoffset + 3.3
 
-	fs("hypertext", data.inv_width + (one and 4.7 or 3.95), y, 3, 0.6, "rcp_num",
+	hypertext(data.inv_width + (one and 4.7 or 3.95), y, 3, 0.6, "rcp_num",
 		fmt("<global size=16><right>%s</right>", lbl))
 
 	if not one then
@@ -1086,8 +1106,8 @@ local function get_rcp_lbl(fs, data, panel, rn, is_recipe)
 		local next_name = fmt("next_%s", btn_suffix)
 		local size = 0.3
 
-		fs("image_button", data.inv_width + 7.05, y, size, size, "", prev_name, "")
-		fs("image_button", data.inv_width + 7.5,  y, size, size, "", next_name, "")
+		image_button(data.inv_width + 7.05, y, size, size, "", prev_name, "")
+		image_button(data.inv_width + 7.5,  y, size, size, "", next_name, "")
 	end
 
 	get_grid_fs(fs, data, rcp, is_recipe)
@@ -1134,7 +1154,7 @@ local function get_model_fs(fs, data, def, model_alias)
 		insert(t, t[#t])
 	end
 
-	fs("model", data.inv_width + 6.6, data.yoffset + 0.05, 1.3, 1.3, "preview",
+	model(data.inv_width + 6.6, data.yoffset + 0.05, 1.3, 1.3, "preview",
 		def.mesh, concat(t, ","), "0,0", "true", "true",
 		model_alias and model_alias.frames or "")
 end
@@ -1149,16 +1169,16 @@ local function get_header(fs, data)
 		local fav_marked = fmt("i3_fav%s.png", fav and "_off" or "")
 		fs(fmt("style[fav;fgimg=%s;fgimg_hovered=%s;fgimg_pressed=%s]",
 			fmt("i3_fav%s.png", fav and "" or "_off"), fav_marked, fav_marked))
-		fs("image_button", star_x, star_y, size, size, "", "fav", "")
+		image_button(star_x, star_y, size, size, "", "fav", "")
 		fs(fmt("tooltip[fav;%s]", fav and ES"Unmark this item" or ES"Mark this item"))
 	else
 		fs(fmt("style[nofav;fgimg=%s;fgimg_hovered=%s;fgimg_pressed=%s]",
 			"i3_fav_off.png", PNG.cancel, PNG.cancel))
-		fs("image_button", star_x, star_y, size, size, "", "nofav", "")
+		image_button(star_x, star_y, size, size, "", "nofav", "")
 		fs(fmt("tooltip[nofav;%s]", ES"Cannot mark this item. Bookmark limit reached."))
 	end
 
-	fs("image_button", star_x + 0.05, star_y + 0.6, size, size, "", "exit", "")
+	image_button(star_x + 0.05, star_y + 0.6, size, size, "", "exit", "")
 	fs(fmt("tooltip[exit;%s]", ES"Back to item list"))
 
 	local desc_lim, name_lim = 34, 35
@@ -1169,20 +1189,20 @@ local function get_header(fs, data)
 	local Y1 = data.yoffset + 0.47
 	local Y2 = Y1 + 0.5
 
-	if #desc > desc_lim then
-		fs("tooltip", X, Y1 - 0.1, 5.7, 0.24, desc)
+	if utf8_len(desc) > desc_lim then
+		tooltip(X, Y1 - 0.1, 5.7, 0.24, desc)
 		desc = snip(desc, desc_lim)
 	end
 
-	if #tech_name > name_lim then
-		fs("tooltip", X, Y2 - 0.1, 5.7, 0.24, tech_name)
+	if utf8_len(tech_name) > name_lim then
+		tooltip(X, Y2 - 0.1, 5.7, 0.24, tech_name)
 		tech_name = snip(tech_name, name_lim)
 	end
 
 	fs"style_type[label;font=bold;font_size=20]"
-	fs("label", X, Y1, desc)
+	label(X, Y1, desc)
 	fs"style_type[label;font=mono;font_size=16]"
-	fs("label", X, Y2, clr(colors.blue, tech_name))
+	label(X, Y2, clr(colors.blue, tech_name))
 	fs"style_type[label;font=normal;font_size=16]"
 
 	local def = reg_items[data.query_item]
@@ -1191,7 +1211,7 @@ local function get_header(fs, data)
 	if def.drawtype == "mesh" or model_alias then
 		get_model_fs(fs, data, def, model_alias)
 	else
-		fs("item_image", data.inv_width + 6.8, data.yoffset + 0.17, 1.1, 1.1, data.query_item)
+		item_image(data.inv_width + 6.8, data.yoffset + 0.17, 1.1, 1.1, data.query_item)
 	end
 end
 
@@ -1201,7 +1221,7 @@ local function get_export_fs(fs, data, is_recipe, is_usage, max_stacks_rcp, max_
 
 	fs(fmt("style[export_%s;fgimg=%s;fgimg_hovered=%s]",
 		name, fmt("%s", show_export and PNG.export_hover or PNG.export), PNG.export_hover))
-	fs("image_button", data.inv_width + 7.35, data.yoffset + 0.2, 0.45, 0.45, "", fmt("export_%s", name), "")
+	image_button(data.inv_width + 7.35, data.yoffset + 0.2, 0.45, 0.45, "", fmt("export_%s", name), "")
 	fs(fmt("tooltip[export_%s;%s]", name, ES"Quick crafting"))
 
 	if not show_export then return end
@@ -1223,8 +1243,8 @@ local function get_export_fs(fs, data, is_recipe, is_usage, max_stacks_rcp, max_
 	   fmt("scrollbaroptions[min=1;max=%u;smallstep=1]", craft_max))
 
 	local x = data.inv_width + 8.1
-	fs("scrollbar", x, data.yoffset, 2.5, 0.35, "horizontal", fmt("scrbar_%s", name), stack_fs)
-	fs("button", x, data.yoffset + 0.4, 2.5, 0.7, fmt("craft_%s", name), ES("Craft (×@1)", stack_fs))
+	scrollbar(x, data.yoffset, 2.5, 0.35, "horizontal", fmt("scrbar_%s", name), stack_fs)
+	button(x, data.yoffset + 0.4, 2.5, 0.7, fmt("craft_%s", name), ES("Craft (×@1)", stack_fs))
 end
 
 local function get_rcp_extra(fs, data, player, panel, is_recipe, is_usage)
@@ -1260,7 +1280,7 @@ local function get_rcp_extra(fs, data, player, panel, is_recipe, is_usage)
 		get_rcp_lbl(fs, data, panel, rn, is_recipe)
 	else
 		local lbl = is_recipe and ES"No recipes" or ES"No usages"
-		fs("button", data.inv_width + 0.1, data.yoffset + (panel.height / 2) - 0.5, 7.8, 1, "no_rcp", lbl)
+		button(data.inv_width + 0.1, data.yoffset + (panel.height / 2) - 0.5, 7.8, 1, "no_rcp", lbl)
 	end
 
 	fs"container_end[]"
@@ -1304,31 +1324,47 @@ local function get_items_fs(fs, data, player, full_height)
 	local ipp = rows * lines
 	local size = 0.85
 
-	fs("bg9", data.inv_width + 0.1, 0, 7.9, full_height, PNG.bg_full, 10)
+	bg9(data.inv_width + 0.1, 0, 7.9, full_height, PNG.bg_full, 10)
 
-	fs(fmt("box[%f,0.2;4.05,0.6;#bababa25]", data.inv_width + 0.3),
-	   "set_focus[filter]",
-	   fmt("field[%f,0.2;2.95,0.6;filter;;%s]", data.inv_width + 0.35, ESC(data.filter)),
-	   "field_close_on_enter[filter;false]")
+	if data.enable_search then
+		fs("set_focus[filter]",
+		   "style[filter;font_size=18;textcolor=#ccc]",
+		   fmt("field[%f,0.2;3.35,0.6;filter;;%s]", data.inv_width + 0.85, ESC(data.filter)),
+		   "field_close_on_enter[filter;false]")
+	else
+		fs"style_type[label;font=italic;font_size=18]"
+		label(data.inv_width + 0.9, 0.49, clr("#aaa", ES"Search..."))
+		button(data.inv_width + 0.8, 0.1, 4, 0.8, "enable_search", "")
+	end
 
-	fs("image_button", data.inv_width + 3.35, 0.35, 0.3,  0.3,  "", "cancel", "")
-	fs("image_button", data.inv_width + 3.85, 0.32, 0.35, 0.35, "", "search", "")
-	fs("image_button", data.inv_width + 5.27, 0.3,  0.35, 0.35, "", "prev_page", "")
-	fs("image_button", data.inv_width + 7.45, 0.3,  0.35, 0.35, "", "next_page", "")
+	image_button(data.inv_width + 0.35, 0.32, 0.35, 0.35, "", "search", "")
+	image_button(data.inv_width + 5.27, 0.3,  0.35, 0.35, "", "prev_page", "")
+	image_button(data.inv_width + 7.45, 0.3,  0.35, 0.35, "", "next_page", "")
+
+	fs(fmt("tooltip[search;%s]", ES"Search"))
+
+	if true_str(data.filter) then
+		image_button(data.inv_width + 4.3, 0.4, 0.2, 0.2,  "", "cancel", "")
+		fs(fmt("tooltip[cancel;%s]", ES"Clear"))
+		box(data.inv_width + 0.85, 0.75, 3.74, 0.01, "#f9826c")
+	end
 
 	data.pagemax = max(1, ceil(#items / ipp))
 
-	fs("button", data.inv_width + 5.6, 0.14, 1.88, 0.7, "pagenum",
+	button(data.inv_width + 5.6, 0.14, 1.88, 0.7, "pagenum",
 		fmt("%s / %u", clr(colors.yellow, data.pagenum), data.pagemax))
 
 	if #items == 0 then
 		local lbl = ES"No item to show"
+		local icon, width, offset = PNG.no_result, 4, 2
 
 		if next(i3.recipe_filters) and #i3.init_items > 0 and data.filter == "" then
-			lbl = ES"Collect items to reveal more recipes"
+			lbl = ES"Collect items to reveal more recipes" -- Progressive mode, etc.
+			icon, width, offset = PNG.find_more, 2.5, 2.75
 		end
 
-		fs("button", data.inv_width + 0.1, 3, 8, 1, "no_item", lbl)
+		image(data.inv_width + offset, 3.5, width, width, icon)
+		button(data.inv_width + 0.1, 7, 8, 1, "no_item", lbl)
 	else
 		local first_item = (data.pagenum - 1) * ipp
 
@@ -1343,7 +1379,7 @@ local function get_items_fs(fs, data, player, full_height)
 			      X -= (X * 0.045) + data.inv_width + 0.28
 
 			local Y = round((i % ipp - X) / rows + 1, 0)
-			      Y -= (Y * 0.085) + 0.95
+			      Y -= (Y * 0.085) + 0.92
 
 			insert(fs, fmt("item_image_button", X, Y, size, size, name, item, ""))
 
@@ -1352,7 +1388,7 @@ local function get_items_fs(fs, data, player, full_height)
 
 				fs(fmt("tooltip[%s;%s]", item, expand and ES"Click to hide" or ES"Click to expand"))
 				fs"style_type[label;font=bold;font_size=20]"
-				fs("label", X + 0.65, Y + 0.7, expand and "-" or "+")
+				label(X + 0.65, Y + 0.7, expand and "-" or "+")
 				fs"style_type[label;font=normal;font_size=16]"
 			end
 		end
@@ -1369,25 +1405,25 @@ local function get_items_fs(fs, data, player, full_height)
 		PNG.tab_small_hover, selected and "#fff" or "#ddd"))
 
 		fs"style_type[image_button:hovered;textcolor=#fff]"
-		fs("image_button", (data.inv_width - 0.65) + (i * (tab_len + 0.1)),
+		image_button((data.inv_width - 0.65) + (i * (tab_len + 0.1)),
 			full_height, tab_len, tab_hgh, "", fmt("itab_%u", i), title)
 	end
 end
 
 local function get_favs(fs, data)
 	local btn_size = i3.settings.item_btn_size
-	fs("label", data.inv_width + 0.4, data.yoffset + 0.4, ES"Bookmarks")
+	label(data.inv_width + 0.4, data.yoffset + 0.4, ES"Bookmarks")
 
-	for i = 1, #data.favs do
-		local item = data.favs[i]
+	for i, item in ipairs(data.favs) do
+		local name = fmt("_%s", item)
 		local X = data.inv_width - 0.7 + (i * 1.2)
 		local Y = data.yoffset + 0.8
 
 		if data.query_item == item then
-			fs("image", X, Y, btn_size, btn_size, PNG.slot)
+			image(X, Y, btn_size, btn_size, PNG.slot)
 		end
 
-		fs("item_image_button", X, Y, btn_size, btn_size, item, item, "")
+		item_image_button(X, Y, btn_size, btn_size, item, name, "")
 	end
 end
 
@@ -1404,7 +1440,7 @@ local function get_panels(fs, data, player)
 			data.yoffset += panels[i - 1].height + 0.1
 		end
 
-		fs("bg9", data.inv_width + 0.1, data.yoffset, 7.9, panel.height, PNG.bg_full, 10)
+		bg9(data.inv_width + 0.1, data.yoffset, 7.9, panel.height, PNG.bg_full, 10)
 
 		local is_recipe, is_usage = panel.name == "recipes", panel.name == "usages"
 		panel.func(fs, data, player, panel, is_recipe, is_usage)
@@ -1446,13 +1482,14 @@ local function get_tabs_fs(fs, player, data, full_height)
 		local Y = btm and full_height or -tab_hgh
 
 		fs"style_type[image_button:hovered;textcolor=#fff]"
-		fs("image_button", X, Y, tab_len, tab_hgh, "", fmt("tab_%s", def.name), ESC(def.description))
+		image_button(X, Y, tab_len, tab_hgh, "", fmt("tab_%s", def.name), ESC(def.description))
 
 		if true_str(def.image) then
 			local desc = translate(data.lang_code, def.description)
+			local desc_len = utf8_len(desc)
+
 			fs("style_type[image;noclip=true]")
-			fs("image", X + (tab_len / 2) - ((#desc * 0.1) / 2) - 0.55,
-				Y + 0.05, 0.35, 0.35, fmt("%s^\\[resize:16x16", def.image))
+			image(X + (tab_len / 2) - ((desc_len * 0.1) / 2) - 0.55, Y + 0.05, 0.35, 0.35, def.image)
 		end
 
 		c++
@@ -1461,28 +1498,28 @@ end
 
 local function get_debug_grid(data, fs, full_height)
 	fs"style[hide_debug_grid;noclip=true]"
-	fs("button", -2, full_height - 1, 2, 1, "hide_debug_grid", "Toggle grid")
+	button(-2, full_height - 1, 2, 1, "hide_debug_grid", "Toggle grid")
 	if data.hide_debug_grid then return end
 
 	fs("style_type[label;font_size=8;noclip=true]")
 	local spacing, i = 0.2, 1
 
 	for x = 0, data.inv_width + 8, spacing do
-		fs("box", x, 0, 0.01, full_height, "#ff0")
-		fs("label", x, full_height + 0.1, tostring(i))
+		box(x, 0, 0.01, full_height, "#ff0")
+		label(x, full_height + 0.1, tostring(i))
 		i++
 	end
 
 	i = 61
 
 	for y = 0, full_height, spacing do
-		fs("box", 0, y, data.inv_width + 8, 0.01, "#ff0")
-		fs("label", -0.15, y, tostring(i))
+		box(0, y, data.inv_width + 8, 0.01, "#ff0")
+		label(-0.15, y, tostring(i))
 		i -= 1
 	end
 
-	fs("box", data.inv_width / 2, 0, 0.01, full_height, "#f00")
-	fs("box", 0, full_height / 2, data.inv_width, 0.01, "#f00")
+	box(data.inv_width / 2, 0, 0.01, full_height, "#f00")
+	box(0, full_height / 2, data.inv_width, 0.01, "#f00")
 	fs"style_type[label;font_size=16]"
 end
 
@@ -1508,9 +1545,10 @@ local function make_fs(player, data)
 	fs(fmt("formspec_version[%u]size[%f,%f]no_prepend[]bgcolor[#0000]",
 		i3.settings.min_fs_version, data.inv_width + 8, full_height), styles)
 
-	fs("bg9", 0, 0, data.inv_width, full_height, PNG.bg_full, 10)
+	bg9(0, 0, data.inv_width, full_height, PNG.bg_full, 10)
 
 	local tab = i3.tabs[data.tab]
+
 	if tab then
 		tab.formspec(player, data, fs)
 	end
@@ -1521,7 +1559,15 @@ local function make_fs(player, data)
 		get_items_fs(fs, data, player, full_height)
 	end
 
-	if #i3.tabs > 1 then
+	local visible_tabs = #i3.tabs
+
+	for _, def in ipairs(i3.tabs) do
+		if def.access and not def.access(player, data) then
+			visible_tabs -= 1
+		end
+	end
+
+	if visible_tabs > 1 then
 		get_tabs_fs(fs, player, data, full_height)
 	end
 

src/preprocessor.lua

@@ -3,6 +3,8 @@
 
 local fmt, split = string.format, string.split
 local var = "[%w%.%[%]\"\'_]"
+local modpath = core.get_modpath"i3"
+local _,_, fs_elements = dofile(modpath .. "/src/styles.lua")
 
 local operators = {
 	["([%+%-%*%^/&|])="] = function(a, b, c)
@@ -43,6 +45,16 @@ local function compile(data)
 		return "local " .. a:gsub("\"", "") .. " = i3.get(" .. a .. ")"
 	end)
 
+	data = data:gsub("([%w_]+)%(", function(a)
+		if fs_elements[a] then
+			return fmt("fs('%s',", a)
+		end
+	end)
+
+	data = data:gsub("([%w_]+)-%-\n", function(a)
+		return fmt("%s = %s - 1", a, a)
+	end)
+
 	for op, func in pairs(operators) do
 		data = data:gsub("(" .. var .. "+)%s?" .. op .. "%s?(" .. var .. "*)", func)
 	end

src/progressive.lua

@@ -32,7 +32,9 @@ local function item_in_inv(item, inv_items)
 	local inv_items_size = #inv_items
 
 	if is_group(item) then
-		local groups = extract_groups(item)
+		local groupname = item:sub(7)
+		local group_cache = i3.groups[groupname]
+		local groups = group_cache and group_cache.groups or extract_groups(item)
 
 		for i = 1, inv_items_size do
 			local def = core.registered_items[inv_items[i]]
@@ -89,6 +91,10 @@ local item_lists = {"main", "craft", "craftpreview"}
 
 local function get_inv_items(player)
 	local inv = player:get_inventory()
+	if not inv then
+		return {}
+	end
+
 	local stacks = {}
 
 	for i = 1, #item_lists do

src/styles.lua

@@ -42,6 +42,8 @@ local PNG = {
 	home = "i3_home.png",
 	flag = "i3_flag.png",
 	edit = "i3_edit.png",
+	no_result = "i3_no_result.png",
+	find_more = "i3_find_more.png",
 
 	cancel_hover = "i3_cancel.png^\\[brighten",
 	search_hover = "i3_search.png^\\[brighten",
@@ -74,11 +76,12 @@ local styles = string.format([[
 	style_type[image_button,item_image_button,checkbox,dropdown;border=false;sound=i3_click]
 	style_type[item_image_button;bgimg_hovered=%s]
 
+	style[;sound=]
 	style[nofav;sound=i3_cannot]
 	style[pagenum,no_item,no_rcp;font=bold;font_size=18]
+	style[search;fgimg=%s;content_offset=0]
 	style[exit;fgimg=%s;fgimg_hovered=%s;content_offset=0]
 	style[cancel;fgimg=%s;fgimg_hovered=%s;content_offset=0]
-	style[search;fgimg=%s;fgimg_hovered=%s;content_offset=0]
 	style[prev_page,prev_recipe,prev_usage,prev_sort,prev_skin;fgimg=%s;fgimg_hovered=%s]
 	style[next_page,next_recipe,next_usage,next_sort,next_skin;fgimg=%s;fgimg_hovered=%s]
 	style[waypoint_add;fgimg=%s;fgimg_hovered=%s;content_offset=0]
@@ -93,9 +96,9 @@ local styles = string.format([[
 	style[confirm_trash_yes;sound=i3_trash]
 ]],
 PNG.slot,
+PNG.search_hover,
 PNG.exit,     PNG.exit_hover,
 PNG.cancel,   PNG.cancel_hover,
-PNG.search,   PNG.search_hover,
 PNG.prev,     PNG.prev_hover,
 PNG.next,     PNG.next_hover,
 PNG.add,      PNG.add_hover,

tests/test_tabs.lua

@@ -16,30 +16,18 @@ i3.new_tab("test2", {
 	end,
 })
 
-i3.new_tab("test3", {
-	description = "Test 3",
+i3.new_tab("test_creative", {
+	description = "Test creative",
 
 	access = function(player, data)
 		local name = player:get_player_name()
-		if name == "singleplayer" then
-			return true
-		end
+		return core.is_creative_enabled(name)
 	end,
 
 	formspec = function(player, data, fs)
-		fs("label[3,1;Test 3]")
+		fs("label[3,1;Creative enabled]")
 	end,
 
-	fields = function(player, data, fields)
-		i3.set_fs(player, "label[3,2;Test extra_fs]")
-	end,
+	fields = i3.set_fs,
 })
 
-i3.override_tab("test2", {
-	description = "Test override",
-	image = "i3_mesepick.png",
-
-	formspec = function(player, data, fs)
-		fs("label[3,1;Override!]")
-	end,
-})

util/luacheck.lua

@@ -1,6 +1,7 @@
 local exec = os.execute
 local fmt, find, sub = string.format, string.find, string.sub
 local var = "[%w%.%[%]\"\'_]"
+local _,_, fs_elements = dofile("../src/styles.lua")
 
 exec "clear"
 
@@ -34,7 +35,7 @@ local files = {
 	"caches",
 	"callbacks",
 	"common",
-	"compress",
+	"compression",
 	"detached_inv",
 	"fields",
 	"groups",
@@ -84,6 +85,16 @@ local function compile(data)
 		return "local " .. a:gsub("\"", "") .. " = i3.get(" .. a .. ")"
 	end)
 
+	data = data:gsub("([%w_]+)%(", function(a)
+		if fs_elements[a] then
+			return fmt("fs('%s',", a)
+		end
+	end)
+
+	data = data:gsub("([%w_]+)-%-\n", function(a)
+		return fmt("%s = %s - 1", a, a)
+	end)
+
 	for op, func in pairs(operators) do
 		data = data:gsub("(" .. var .. "+)%s?" .. op .. "%s?(" .. var .. "*)", func)
 	end
@@ -116,7 +127,7 @@ for _, p in ipairs(files) do
 			end
 		end
 
-		local _file = io.open(path:match("(.*)%.") .. ".l", "w")
+		local _file = io.open(path:match("(.*)%.") .. ".lc", "w")
 		_file:write(data)
 		_file:close()
 	end
@@ -125,6 +136,6 @@ for _, p in ipairs(files) do
 end
 
 exec "luacheck ../init.lua"
-exec "luacheck ../src/operators.lua"
-exec "luacheck ../src/*.l"
-exec "rm ../src/*.l"
+exec "luacheck ../src/preprocessor.lua"
+exec "luacheck ../src/*.lc"
+exec "rm ../src/*.lc"