1 files changed, 30 insertions, 0 deletions
diff --git a/lib/gitlab/word_diff/positions_counter.rb b/lib/gitlab/word_diff/positions_counter.rb
new file mode 100644
index 00000000000..ca66b43755f
--- /dev/null
+++ b/lib/gitlab/word_diff/positions_counter.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+# Responsible for keeping track of line numbers and created Gitlab::Diff::Line objects
+module Gitlab
+  module WordDiff
+    class PositionsCounter
+      def initialize
+        @pos_old = 1
+        @pos_new = 1
+        @line_obj_index = 0
+      end
+
+      attr_reader :pos_old, :pos_new, :line_obj_index
+
+      def increase_pos_num
+        @pos_old += 1
+        @pos_new += 1
+      end
+
+      def increase_obj_index
+        @line_obj_index += 1
+      end
+
+      def set_pos_num(old:, new:)
+        @pos_old = old
+        @pos_new = new
+      end
+    end
+  end
+end