1 files changed, 40 insertions, 0 deletions
diff --git a/lib/gitlab/word_diff/segments/diff_hunk.rb b/lib/gitlab/word_diff/segments/diff_hunk.rb
new file mode 100644
index 00000000000..88b6817676f
--- /dev/null
+++ b/lib/gitlab/word_diff/segments/diff_hunk.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+# Diff hunk is line that starts with @@
+# It contains information about start line numbers
+#
+# Example:
+# @@ -1,4 +1,5 @@
+#
+# See more: https://www.gnu.org/software/diffutils/manual/html_node/Detailed-Unified.html
+module Gitlab
+  module WordDiff
+    module Segments
+      class DiffHunk
+        def initialize(line)
+          @line = line
+        end
+
+        def pos_old
+          line.match(/\-[0-9]*/)[0].to_i.abs rescue 0
+        end
+
+        def pos_new
+          line.match(/\+[0-9]*/)[0].to_i.abs rescue 0
+        end
+
+        def first_line?
+          pos_old <= 1 && pos_new <= 1
+        end
+
+        def to_s
+          line
+        end
+
+        private
+
+        attr_reader :line
+      end
+    end
+  end
+end