lib/scaffolder/region/insert.rb in scaffolder-0.4.2 vs lib/scaffolder/region/insert.rb in scaffolder-0.4.3

@@ -38,14 +38,22 @@
   def position
     raise CoordinateError if @close.nil? && @open.nil?
     open-1..close-1
   end
 
-  # Inserts are comaprable by close position.
+  # Inserts are comparable by close position.
   #
   # @return [Integer]
   # @param [Scaffolder::Region::Insert]
   def <=>(other)
     self.close <=> other.close
+  end
+
+  # The difference in the insert sequence size and the insert location
+  #
+  # @return [Integer]
+  def size_diff
+    insert_size = (close - open) + 1
+    sequence.length - insert_size
   end
 
 end