lib/write_xlsx/chart.rb in write_xlsx-1.11.0 vs lib/write_xlsx/chart.rb in write_xlsx-1.11.1

@@ -948,14 +948,40 @@
         write_cat(series)
         # Write the c:val element.
         write_val(series)
         # Write the c:smooth element.
         write_c_smooth(series.smooth) if ptrue?(@smooth_allowed)
+        write_ext_lst(series.inverted_color) if series.inverted_color
       end
       @series_index += 1
     end
 
+    def write_ext_lst(color)
+      uri = '{6F2FDCE9-48DA-4B69-8628-5D25D57E5C99}'
+      xmlns_c_14 =
+        'http://schemas.microsoft.com/office/drawing/2007/8/2/chart'
+
+      attributes_1 = [
+        ['uri', uri],
+        ['xmlns:c14', xmlns_c_14]
+      ]
+
+      attributes_2 = [
+        ['xmlns:c14', xmlns_c_14]
+      ]
+
+      @writer.tag_elements('c:extLst') do
+        @writer.tag_elements('c:ext', attributes_1) do
+          @writer.tag_elements('c14:invertSolidFillFmt') do
+            @writer.tag_elements('c14:spPr', attributes_2) do
+              write_a_solid_fill(color: color)
+            end
+          end
+        end
+      end
+    end
+
     def write_ser_base(series)
       # Write the c:idx element.
       write_idx(@series_index)
       # Write the c:order element.
       write_order(@series_index)
@@ -2016,23 +2042,28 @@
         width = (0.5 + (12700 * width)).to_i
 
         attributes << ['w', width]
       end
 
-      @writer.tag_elements('a:ln', attributes) do
-        # Write the line fill.
-        if ptrue?(line[:none])
-          # Write the a:noFill element.
-          write_a_no_fill
-        elsif ptrue?(line[:color])
-          # Write the a:solidFill element.
-          write_a_solid_fill(line)
+      if ptrue?(line[:none]) || ptrue?(line[:color]) || line[:dash_type]
+        @writer.tag_elements('a:ln', attributes) do
+          # Write the line fill.
+          if ptrue?(line[:none])
+            # Write the a:noFill element.
+            write_a_no_fill
+          elsif ptrue?(line[:color])
+            # Write the a:solidFill element.
+            write_a_solid_fill(line)
+          end
+
+          # Write the line/dash type.
+          if line[:dash_type]
+            # Write the a:prstDash element.
+            write_a_prst_dash(line[:dash_type])
+          end
         end
-        # Write the line/dash type.
-        if line[:dash_type]
-          # Write the a:prstDash element.
-          write_a_prst_dash(line[:dash_type])
-        end
+      else
+        @writer.empty_tag('a:ln', attributes)
       end
     end
 
     #
     # Write the <a:noFill> element.