Add parsing PresetColor to GradientStop

Changelog.md

@@ -35,6 +35,7 @@
 * Clean way to parse `ParagraphSpacing`
 * `ParagraphTab` now stored in `Tabs` in `ParagraphProperties`
 * Add `OoxmlSize` support of `one_240th_cm` and use in `Spacing`
+* Add parsing `PresetColor` to `GradientStop`
 
 ### Fixes
 * Fix parsing document style id - it can be string, not only digit

lib/ooxml_parser/common_parser/common_data/colors/presentation_fill/gradient_color.rb

@@ -16,7 +16,7 @@ def self.parse(gradient_fill_node)
         case gradient_fill_node_child.name
         when 'gsLst'
           gradient_fill_node_child.xpath('*').each do |gradient_stop_node|
-            gradient_color.gradient_stops << GradientStop.parse(gradient_stop_node)
+            gradient_color.gradient_stops << GradientStop.new(parent: gradient_color).parse(gradient_stop_node)
           end
         when 'path'
           gradient_color.path = gradient_fill_node_child.attribute('path').value.to_sym

lib/ooxml_parser/common_parser/common_data/colors/presentation_fill/gradient_color/gradient_stop.rb

@@ -1,15 +1,28 @@
+require_relative 'gradient_stop/preset_color'
 module OoxmlParser
   class GradientStop < OOXMLDocumentObject
     attr_accessor :position, :color
 
-    def initialize(position)
-      @position = position
-    end
+    # Parse GradientStop object
+    # @param node [Nokogiri::XML:Element] node to parse
+    # @return [GradientStop] result of parsing
+    def parse(node)
+      node.attributes.each do |key, value|
+        case key
+        when 'pos'
+          @position = value.value.to_i / 1_000
+        end
+      end
 
-    def self.parse(gs_node)
-      gradient_stop = GradientStop.new(gs_node.attribute('pos').value.to_i / 1_000)
-      gs_node.xpath('*').each { |color_node| gradient_stop.color = Color.parse_color(color_node) }
-      gradient_stop
+      node.xpath('*').each do |node_child|
+        @color = case node_child.name
+                 when 'prstClr'
+                   PresetColor.new(parent: self).parse(node_child)
+                 else
+                   Color.parse_color(node_child)
+                 end
+      end
+      self
     end
   end
 end

lib/ooxml_parser/common_parser/common_data/colors/presentation_fill/gradient_color/gradient_stop/preset_color.rb

@@ -0,0 +1,20 @@
+module OoxmlParser
+  # Class for working with `a:prstClr` tag
+  class PresetColor < OOXMLDocumentObject
+    # @return [String] value of preset color
+    attr_accessor :value
+
+    # Parse PresetColor object
+    # @param node [Nokogiri::XML:Element] node to parse
+    # @return [PresetColor] result of parsing
+    def parse(node)
+      node.attributes.each do |key, value|
+        case key
+        when 'val'
+          @value = value.value.to_s
+        end
+      end
+      self
+    end
+  end
+end

spec/workbook/worksheet/drawing/shape/properties/fill_color/value/gradient_stops/gradient_stops_color_spec.rb

@@ -0,0 +1,8 @@
+require 'spec_helper'
+
+describe 'My behaviour' do
+  it 'gradient_fill.xlsx' do
+    xlsx = OoxmlParser::XlsxParser.parse_xlsx('spec/workbook/worksheet/drawing/shape/properties/fill_color/value/gradient_stops/gradient_stops_color/gradient_stops_color_preset.xlsx')
+    expect(xlsx.worksheets[0].drawings.first.shape.properties.fill_color.value.gradient_stops.first.color.value).to eq('lightYellow')
+  end
+end