* lib/rss: supported Image module.

http://web.resource.org/rss/1.0/modules/image/


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7876 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rss/maker/image.rb

@@ -0,0 +1,136 @@
+require 'rss/image'
+require 'rss/maker/1.0'
+require 'rss/maker/dublincore'
+
+module RSS
+  module Maker
+    module ImageItemModel
+      def self.append_features(klass)
+        super
+
+        name = "#{RSS::IMAGE_PREFIX}_item"
+        klass.add_need_initialize_variable(name, "make_#{name}")
+        klass.add_other_element(name)
+        klass.__send__(:attr_reader, name)
+        klass.module_eval(<<-EOC, __FILE__, __LINE__)
+          def setup_#{name}(rss, current)
+            if @#{name}
+              @#{name}.to_rss(rss, current)
+            end
+          end
+
+          def make_#{name}
+            self.class::#{Utils.to_class_name(name)}.new(@maker)
+          end
+EOC
+      end
+
+      class ImageItemBase
+        include Base
+        include Maker::DublinCoreModel
+
+        attr_accessor :about, :resource, :image_width, :image_height
+        add_need_initialize_variable(:about, :resource)
+        add_need_initialize_variable(:image_width, :image_height)
+        alias width= image_width=
+        alias width image_width
+        alias height= image_height=
+        alias height image_height
+
+        def have_required_values?
+          @about
+        end
+      end
+    end
+
+    module ImageFaviconModel
+      def self.append_features(klass)
+        super
+
+        name = "#{RSS::IMAGE_PREFIX}_favicon"
+        klass.add_need_initialize_variable(name, "make_#{name}")
+        klass.add_other_element(name)
+        klass.__send__(:attr_reader, name)
+        klass.module_eval(<<-EOC, __FILE__, __LINE__)
+          def setup_#{name}(rss, current)
+            if @#{name}
+              @#{name}.to_rss(rss, current)
+            end
+          end
+
+          def make_#{name}
+            self.class::#{Utils.to_class_name(name)}.new(@maker)
+          end
+EOC
+      end
+
+      class ImageFaviconBase
+        include Base
+        include Maker::DublinCoreModel
+
+        attr_accessor :about, :image_size
+        add_need_initialize_variable(:about, :image_size)
+        alias size image_size
+        alias size= image_size=
+
+        def have_required_values?
+          @about and @image_size
+        end
+      end
+    end
+
+    class ChannelBase; include Maker::ImageFaviconModel; end
+    
+    class ItemsBase
+      class ItemBase; include Maker::ImageItemModel; end
+    end
+
+    class RSS10
+      class Items
+        class Item
+          class ImageItem < ImageItemBase
+            def to_rss(rss, current)
+              if @about
+                item = ::RSS::ImageItemModel::Item.new(@about, @resource)
+                setup_values(item)
+                current.image_item = item
+              end
+            end
+          end
+        end
+      end
+      
+      class Channel
+        class ImageFavicon < ImageFaviconBase
+          def to_rss(rss, current)
+            if @about and @image_size
+              args = [@about, @image_size]
+              favicon = ::RSS::ImageFaviconModel::Favicon.new(*args)
+              setup_values(favicon)
+              current.image_favicon = favicon
+            end
+          end
+        end
+      end
+    end
+
+    class RSS09
+      class Items
+        class Item
+          class ImageItem < ImageItemBase
+            def to_rss(*args)
+            end
+          end
+        end
+      end
+      
+      class Channel
+        class ImageFavicon < ImageFaviconBase
+          def to_rss(*args)
+          end
+        end
+      end
+    end
+
+  end
+end