use #depth computron

app/helpers/domains_helper.rb

@@ -9,10 +9,9 @@ module DomainsHelper
   # Adds a visual cue if the record is shared via permissions feature.
   def domain_name_column(record)
     elements = []
-    @previous_records ||= []
-    level = @previous_records.reduce(0) { |acc, r| record.subdomain_of?(r) ? acc + 1 : acc }
-    if level > 0
-      (level - 1).times do # indent
+    depth = record.depth
+    if depth > 1 && @previous_record && record.subdomain_of?(@previous_record)
+      (depth - 2).times do # indent
         elements << '<span class="ui-icon ui-icon-blank"></span>'
       end
       elements << '<span class="ui-icon ui-icon-carat-1-sw"></span>'
@@ -25,7 +24,7 @@ module DomainsHelper
           data-content="This domain was shared with you by #{h who}"></i>
       HTM
     end
-    @previous_records << record
+    @previous_record = record
     elements.join.html_safe
   end
 end