1 files changed, 21 insertions, 0 deletions
diff --git a/lib/gitlab/word_diff/chunk_collection.rb b/lib/gitlab/word_diff/chunk_collection.rb
index dd388f75302..d5c3e59d405 100644
--- a/lib/gitlab/word_diff/chunk_collection.rb
+++ b/lib/gitlab/word_diff/chunk_collection.rb
@@ -18,6 +18,27 @@ module Gitlab
       def reset
         @chunks = []
       end
+
+      def marker_ranges
+        start = 0
+
+        @chunks.each_with_object([]) do |element, ranges|
+          mode = mode_for_element(element)
+
+          ranges << Gitlab::MarkerRange.new(start, start + element.length - 1, mode: mode) if mode
+
+          start += element.length
+        end
+      end
+
+      private
+
+      def mode_for_element(element)
+        return Gitlab::MarkerRange::DELETION if element.removed?
+        return Gitlab::MarkerRange::ADDITION if element.added?
+
+        nil
+      end
     end
   end
 end