Improve search filter accuracy

init.lua

@@ -1083,6 +1083,16 @@ craftguide.register_craft_type("digging_chance", {
 	icon = "default_tool_mesepick.png",
 })
 
+local function sfind(str, filter)
+	if filter == "" then
+		return 0
+	end
+
+	if find(str, filter, 1, true) then
+		return #str - #filter
+	end
+end
+
 local function search(data)
 	local filter = data.filter
 
@@ -1091,7 +1101,7 @@ local function search(data)
 		return
 	end
 
-	local opt = "^(.-)%+([%w_]*)=*([%w_,]*)"
+	local opt = "^(.-)%+([%w_]+)=([%w_,]+)"
 	local search_filter = next(search_filters) and match(filter, opt)
 	local filters = {}
 
@@ -1104,30 +1114,28 @@ local function search(data)
 		end
 	end
 
-	local filtered_list, c = {}, 0
+	local filtered_list, order, c = {}, {}, 0
 
 	for i = 1, #data.items_raw do
 		local item = data.items_raw[i]
 		local def  = reg_items[item]
 		local desc = (def and def.description) and lower(def.description) or ""
-		local search_in = fmt("%s %s", item, desc)
 		local to_add
 
 		if search_filter then
 			for filter_name, values in pairs(filters) do
-				if values then
 				local func = search_filters[filter_name]
 				to_add = func(item, values) and (search_filter == "" or
-						find(search_in, search_filter, 1, true))
-				end
+					(sfind(item, search_filter) or sfind(desc, search_filter)))
 			end
 		else
-			to_add = find(search_in, filter, 1, true)
+			to_add = sfind(item, filter) or sfind(desc, filter)
 		end
 
 		if to_add then
 			c = c + 1
 			filtered_list[c] = item
+			order[item] = to_add
 		end
 	end
 
@@ -1140,6 +1148,10 @@ local function search(data)
 		end
 	end
 
+	sort(filtered_list, function(a, b)
+		return order[a] < order[b]
+	end)
+
 	data.items = filtered_list
 end