name : xml-stylesheet.rb # frozen_string_literal: false require_relative "utils" module RSS module XMLStyleSheetMixin attr_accessor :xml_stylesheets def initialize(*args) super @xml_stylesheets = [] end private def xml_stylesheet_pi xsss = @xml_stylesheets.collect do |xss| pi = xss.to_s pi = nil if /\A\s*\z/ =~ pi pi end.compact xsss.push("") unless xsss.empty? xsss.join("\n") end end class XMLStyleSheet include Utils ATTRIBUTES = %w(href type title media charset alternate) GUESS_TABLE = { "xsl" => "text/xsl", "css" => "text/css", } attr_accessor(*ATTRIBUTES) attr_accessor(:do_validate) def initialize(*attrs) if attrs.size == 1 and (attrs.first.is_a?(Hash) or attrs.first.is_a?(Array)) attrs = attrs.first end @do_validate = true ATTRIBUTES.each do |attr| __send__("#{attr}=", nil) end vars = ATTRIBUTES.dup vars.unshift(:do_validate) attrs.each do |name, value| if vars.include?(name.to_s) __send__("#{name}=", value) end end end def to_s rv = "" if @href rv << %Q[<?xml-stylesheet] ATTRIBUTES.each do |name| if __send__(name) rv << %Q[ #{name}="#{h __send__(name)}"] end end rv << %Q[?>] end rv end remove_method(:href=) def href=(value) @href = value if @href and @type.nil? @type = guess_type(@href) end @href end remove_method(:alternate=) def alternate=(value) if value.nil? or /\A(?:yes|no)\z/ =~ value @alternate = value else if @do_validate args = ["?xml-stylesheet?", %Q[alternate="#{value}"]] raise NotAvailableValueError.new(*args) end end @alternate end def setup_maker(maker) xss = maker.xml_stylesheets.new_xml_stylesheet ATTRIBUTES.each do |attr| xss.__send__("#{attr}=", __send__(attr)) end end private def guess_type(filename) /\.([^.]+)$/ =~ filename GUESS_TABLE[$1] end end end