Craftguide: Use better tooltips for group buttons

group.lua

@@ -1,3 +1,5 @@
+local S = unified_inventory.gettext
+
 function unified_inventory.canonical_item_spec_matcher(spec)
 	local specname = ItemStack(spec):get_name()
 	if specname:sub(1, 6) == "group:" then
@@ -21,6 +23,27 @@ function unified_inventory.item_matches_spec(item, spec)
 	return unified_inventory.canonical_item_spec_matcher(spec)(itemname)
 end
 
+function unified_inventory.extract_groupnames(groupname)
+	local specname = ItemStack(groupname):get_name()
+	if specname:sub(1, 6) == "group:" then
+		local group_names = specname:sub(7):split(",")
+		if #group_names == 1 then
+			return group_names[1], 1
+		end
+		local s = ""
+		for g=1,#group_names do
+			if g > 1 then
+				-- List connector
+				s = s .. S(" and ")
+			end
+			s = s .. group_names[g]
+		end
+		return s, #group_names
+	else
+		return nil, 0
+	end
+end
+
 unified_inventory.registered_group_items = {
 	mesecon_conductor_craftable = "mesecons:wire_00000000_off",
 	stone = "default:cobble",

locale/de.txt

@@ -57,6 +57,8 @@ Show next usage = Nächste Verwendung zeigen
 Show previous recipe = Vorheriges Rezept zeigen
 Show previous usage = Vorherige Verwendung zeigen
 This recipe is too\nlarge to be displayed. = Dieses Rezept ist zu\ngroß, um angezeigt\nzu werden.
+Any item belonging to the %s group = Irgendein Gegenstand, der zur Gruppe %s gehört
+Any item belonging to the groups %s = Irgendein Gegenstand, der zu den Gruppen %s gehört
 Recipe %d of %d = Rezept %d von %d
 Usage %d of %d = Verwendung %d von %d
 No recipes = Keine Rezepte
@@ -71,6 +73,9 @@ Clear inventory = Inventar leeren
 Give me: = Gib mir:
 To craft grid: = Ins Fertigungsraster:
 
+### group.lua ###
+\sand\s=\sund\s
+
 ### waypoints.lua ###
 White = Weiß
 Yellow = Gelb

locale/template.txt

@@ -60,6 +60,10 @@ Show previous recipe =
 Show previous usage = 
 # Shown for huge crafting recipes; try to keep the line length short and use multiple line breaks as needed
 This recipe is too\nlarge to be displayed. = 
+# %s = group name (e.g. wool)
+Any item belonging to the %s group = 
+# %s = List of “and”-concatenated group names
+Any item belonging to the groups %s =
 Recipe %d of %d = 
 Usage %d of %d = 
 No recipes =
@@ -74,6 +78,10 @@ Clear inventory =
 Give me: =
 To craft grid: =
 
+### group.lua ###
+# Logical connective, example: “Any item belonging to the groups foo and bar”
+\sand\s = 
+
 ### waypoints.lua ###
 White = 
 Yellow = 

register.lua

@@ -188,11 +188,24 @@ local function stack_image_button(x, y, w, h, buttonname_prefix, item)
 		selectitem = group_item.sole and displayitem or name
 	end
 	local label = show_is_group and "G" or ""
-	return string.format("item_image_button[%f,%f;%f,%f;%s;%s;%s]",
+	local buttonname = minetest.formspec_escape(buttonname_prefix..unified_inventory.mangle_for_formspec(selectitem))
+	local button = string.format("item_image_button[%f,%f;%f,%f;%s;%s;%s]",
 			x, y, w, h,
-			minetest.formspec_escape(displayitem),
-			minetest.formspec_escape(buttonname_prefix..unified_inventory.mangle_for_formspec(selectitem)),
-			label)
+			minetest.formspec_escape(displayitem), buttonname, label)
+	if show_is_group then
+		local groupstring, andcount = unified_inventory.extract_groupnames(name)
+		local grouptip
+		if andcount == 1 then
+			grouptip = string.format(S("Any item belonging to the %s group"), groupstring)
+		elseif andcount > 1 then
+			grouptip = string.format(S("Any item belonging to the groups %s"), groupstring)
+		end
+		grouptip = minetest.formspec_escape(grouptip)
+		if andcount >= 1 then
+			button = button  .. string.format("tooltip[%s;%s]", buttonname, grouptip)
+		end
+	end
+	return button
 end
 
 local recipe_text = {