lib/review/book/base.rb in review-4.1.0 vs lib/review/book/base.rb in review-4.2.0

@@ -77,11 +77,11 @@
       end
 
       def page_metric
         if config['page_metric'].respond_to?(:downcase) && config['page_metric'].upcase =~ /\A[A-Z0-9_]+\Z/
           ReVIEW::Book::PageMetric.const_get(config['page_metric'].upcase)
-        elsif config['page_metric'].is_a?(Array) && config['page_metric'].size == 5
+        elsif config['page_metric'].is_a?(Array) && (config['page_metric'].size == 5 || config['page_metric'].size == 4)
           ReVIEW::Book::PageMetric.new(*config['page_metric'])
         else
           config['page_metric']
         end
       end
@@ -173,12 +173,10 @@
         end
         nil # not found
       end
 
       def volume
-        vol = Volume.sum(chapters.map(&:volume))
-        vol.page_per_kbyte = page_metric.page_per_kbyte
-        vol
+        Volume.sum(parts.map(&:volume) + chapters.map(&:volume))
       end
 
       def load_config(filename)
         new_conf = YAML.load_file(filename)
         @config.merge!(new_conf)