lib/attachment_magick/configuration/configuration.rb in attachment_magick-0.2.7 vs lib/attachment_magick/configuration/configuration.rb in attachment_magick-0.3

@@ -1,9 +1,11 @@
 require "attachment_magick/configuration/custom_style"
+require 'css_parser'
 
 module AttachmentMagick
   class Configuration
+    include CssParser
 
     attr_accessor :columns_amount
     attr_accessor :columns_width
     attr_accessor :gutter
     attr_accessor :default_add_partial
@@ -22,9 +24,31 @@
       if block_given?
         @custom_styles = CustomStyle.new
         @custom_styles.instance_eval(&block)
       else
         return @custom_styles
+      end
+    end
+
+    def parse_stylesheet(stylesheet)
+      return if stylesheet.blank?
+
+      stylesheet_file = Dir.glob(File.join(Rails.root, "public", "**", "#{stylesheet}")).first
+      parser          = CssParser::Parser.new
+
+      if stylesheet_file
+        parser.load_uri!(stylesheet_file)
+
+        all_containers  = parser.find_by_selector(/\.container/).keys
+        container       = all_containers.first
+        container_width = parser.find_by_selector(/\.container/)[container]["width"].to_i
+        grid_1          = parser.find_by_selector(/\b(grid_1)\b/).values
+        grid_1_width    = grid_1.detect{|attr| attr["width"]}["width"].to_i
+        gutter          = grid_1.map{|attr| attr.values_at('margin-left')}.flatten.compact.join.to_i
+
+        @columns_width  = grid_1_width
+        @gutter         = gutter
+        @columns_amount = container_width/(@columns_width+@gutter*2)
       end
     end
   end
 end
\ No newline at end of file