1 files changed, 38 insertions, 0 deletions
diff --git a/lib/axlsx/workbook/worksheet/worksheet_comments.rb b/lib/axlsx/workbook/worksheet/worksheet_comments.rb
new file mode 100644
index 00000000..25ddb024
--- /dev/null
+++ b/lib/axlsx/workbook/worksheet/worksheet_comments.rb
@@ -0,0 +1,38 @@
+module Axlsx
+
+  #A wraper class for comments that defines its on worksheet
+  #serailization
+  class WorksheetComments
+
+    def initialize(worksheet)
+      raise ArugumentError, 'You must provide a worksheet' unless worksheet.is_a?(Worksheet)
+      @worksheet = worksheet
+    end
+    attr_reader :worksheet
+
+    def comments
+      @comments ||= Comments.new(worksheet)
+    end
+
+    def add_comment(options={})
+      comments.add_comment(options)
+    end 
+
+    def relationships
+      return [] unless has_comments?
+      comments.relationships
+    end
+
+    def has_comments?
+      !comments.empty?
+    end
+
+    def index
+      worksheet.relationships.index { |r| r.Type == VML_DRAWING_R } + 1
+    end
+    def to_xml_string(str = '')
+      return unless has_comments?
+      str << "<legacyDrawing r:id='rId#{index}' />"
+    end
+  end
+end