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require "rss/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
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