require 'rss/1.0' require 'rss/dublincore' module RSS # The prefix for the Image XML namespace. IMAGE_PREFIX = 'image' # The URI for the Image specification. IMAGE_URI = 'http://purl.org/rss/1.0/modules/image/' RDF.install_ns(IMAGE_PREFIX, IMAGE_URI) # This constant holds strings which contain the names of # image elements, with the appropriate prefix. IMAGE_ELEMENTS = [] %w(item favicon).each do |name| class_name = Utils.to_class_name(name) BaseListener.install_class_name(IMAGE_URI, name, "Image#{class_name}") IMAGE_ELEMENTS << "#{IMAGE_PREFIX}_#{name}" end module ImageModelUtils def validate_one_tag_name(ignore_unknown_element, name, tags) if !ignore_unknown_element invalid = tags.find {|tag| tag != name} raise UnknownTagError.new(invalid, IMAGE_URI) if invalid end raise TooMuchTagError.new(name, tag_name) if tags.size > 1 end end module ImageItemModel include ImageModelUtils extend BaseModel def self.append_features(klass) super klass.install_have_child_element("item", IMAGE_URI, "?", "#{IMAGE_PREFIX}_item") klass.install_must_call_validator(IMAGE_PREFIX, IMAGE_URI) end class ImageItem < Element include RSS10 include DublinCoreModel @tag_name = "item" class << self def required_prefix IMAGE_PREFIX end def required_uri IMAGE_URI end end install_must_call_validator(IMAGE_PREFIX, IMAGE_URI) [ ["about", ::RSS::RDF::URI, true], ["resource", ::RSS::RDF::URI, false], ].each do |name, uri, required| install_get_attribute(name, uri, required, nil, nil, "#{::RSS::RDF::PREFIX}:#{name}") end %w(width height).each do |tag| full_name = "#{IMAGE_PREFIX}_#{tag}" disp_name = "#{IMAGE_PREFIX}:#{tag}" install_text_element(tag, IMAGE_URI, "?", full_name, :integer, disp_name) BaseListener.install_get_text_element(IMAGE_URI, tag, full_name) end alias width= image_width= alias width image_width alias height= image_height= alias height image_height def initialize(*args) if Utils.element_initialize_arguments?(args) super else super() self.about = args[0] self.resource = args[1] end end def full_name tag_name_with_prefix(IMAGE_PREFIX) end private def maker_target(target) target.image_item end def setup_maker_attributes(item) item.about = self.about item.resource = self.resource end end end module ImageFaviconModel include ImageModelUtils extend BaseModel def self.append_features(klass) super unless klass.class == Module klass.install_have_child_element("favicon", IMAGE_URI, "?", "#{IMAGE_PREFIX}_favicon") klass.install_must_call_validator(IMAGE_PREFIX, IMAGE_URI) end end class ImageFavicon < Element include RSS10 include DublinCoreModel @tag_name = "favicon" class << self def required_prefix IMAGE_PREFIX end def required_uri IMAGE_URI end end [ ["about", ::RSS::RDF::URI, true, ::RSS::RDF::PREFIX], ["size", IMAGE_URI, true, IMAGE_PREFIX], ].each do |name, uri, required, prefix| install_get_attribute(name, uri, required, nil, nil, "#{prefix}:#{name}") end AVAILABLE_SIZES = %w(small medium large) alias_method :set_size, :size= private :set_size def size=(new_value) if @do_validate and !new_value.nil? new_value = new_value.strip unless AVAILABLE_SIZES.include?(new_value) attr_name = "#{IMAGE_PREFIX}:size" raise NotAvailableValueError.new(full_name, new_value, attr_name) end end set_size(new_value) end alias image_size= size= alias image_size size def initialize(*args) if Utils.element_initialize_arguments?(args) super else super() self.about = args[0] self.size = args[1] end end def full_name tag_name_with_prefix(IMAGE_PREFIX) end private def maker_target(target) target.image_favicon end def setup_maker_attributes(favicon) favicon.about = self.about favicon.size = self.size end end end class RDF class Channel; include ImageFaviconModel; end class Item; include ImageItemModel; end end end