* test/rss/test_xml-stylesheet.rb: added tests for xml-stylesheet.

* lib/rss/xml-stylesheet.rb: added xml-stylesheet parsing
  function.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5989 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rss/0.9.rb

@@ -10,6 +10,8 @@ module RSS
 	class Rss < Element
 
 		include RSS09
+		include RootElementMixin
+		include XMLStyleSheetMixin
 
 		[
 			["channel", nil],
@@ -24,18 +26,9 @@ module RSS
 		attr_accessor :rss_version, :version, :encoding, :standalone
 		
 		def initialize(rss_version, version=nil, encoding=nil, standalone=nil)
-			super()
-			@rss_version = rss_version
-			@version = version || '1.0'
-			@encoding = encoding
-			@standalone = standalone
+			super
 		end
 
-		def output_encoding=(enc)
-			@output_encoding = enc
-			self.converter = Converter.new(@output_encoding, @encoding)
-		end
-		
 		def items
 			if @channel
 				@channel.items
@@ -55,7 +48,7 @@ module RSS
 		def to_s(convert=true)
 			rv = <<-EOR
 #{xmldecl}
-<rss version="#{@rss_version}"#{ns_declaration}>
+#{xml_stylesheet_pi}<rss version="#{@rss_version}"#{ns_declaration}>
 #{channel_element(false)}
 #{other_element(false, "\t")}
 </rss>
@@ -65,25 +58,6 @@ EOR
 		end
 
 		private
-		def xmldecl
-			rv = "<?xml version='#{@version}'"
-			if @output_encoding or @encoding
-				rv << " encoding='#{@output_encoding or @encoding}'" 
-			end
-			rv << " standalone='#{@standalone}'" if @standalone
-			rv << '?>'
-			rv
-		end
-
-		def ns_declaration
-			rv = ''
-			NSPOOL.each do |prefix, uri|
-				prefix = ":#{prefix}" unless prefix.empty?
-				rv << %Q|\n\txmlns#{prefix}="#{uri}"|
-			end
-			rv
-		end
-		
 		def children
 			[@channel]
 		end
@@ -423,6 +397,7 @@ EOT
 			check_ns(tag_name, prefix, ns, nil)
 			
 			@rss = Rss.new(attrs['version'], @version, @encoding, @standalone)
+			@rss.xml_stylesheets = @xml_stylesheets
 			@last_element = @rss
 			@proc_stack.push Proc.new { |text, tags|
 				@rss.validate_for_stream(tags) if @do_validate

lib/rss/1.0.rb

@@ -10,6 +10,8 @@ module RSS
 	class RDF < Element
 
 		include RSS10
+		include RootElementMixin
+		include XMLStyleSheetMixin
 
 		class << self
 
@@ -45,23 +47,13 @@ module RSS
 		attr_accessor :rss_version, :version, :encoding, :standalone
 		
 		def initialize(version=nil, encoding=nil, standalone=nil)
-			super()
-			@rss_version = '1.0'
-			@version = version || '1.0'
-			@encoding = encoding
-			@standalone = standalone
-			@output_encoding = nil
-		end
-
-		def output_encoding=(enc)
-			@output_encoding = enc
-			self.converter = Converter.new(@output_encoding, @encoding)
+			super('1.0', version, encoding, standalone)
 		end
 
 		def to_s(convert=true)
 			rv = <<-EORDF
 #{xmldecl}
-<#{PREFIX}:RDF#{ns_declaration}>
+#{xml_stylesheet_pi}<#{PREFIX}:RDF#{ns_declaration}>
 #{channel_element(false)}
 #{image_element(false)}
 #{item_elements(false)}
@@ -74,25 +66,6 @@ EORDF
 		end
 
 		private
-		def xmldecl
-			rv = %Q[<?xml version="#{@version}"]
-			if @output_encoding or @encoding
-				rv << %Q[ encoding="#{@output_encoding or @encoding}"]
-			end
-			rv << %Q[ standalone="#{@standalone}"] if @standalone
-			rv << '?>'
-			rv
-		end
-
-		def ns_declaration
-			rv = ''
-			self.class::NSPOOL.each do |prefix, uri|
-				prefix = ":#{prefix}" unless prefix.empty?
-				rv << %Q|\n\txmlns#{prefix}="#{html_escape(uri)}"|
-			end
-			rv
-		end
-		
 		def rdf_validate(tags)
 			_validate(tags, [])
 		end
@@ -647,4 +620,19 @@ EOT
 		BaseListener.install_get_text_element(x, URI, "#{x}=")
 	end
 
+	module ListenerMixin
+		private
+		def start_RDF(tag_name, prefix, attrs, ns)
+			check_ns(tag_name, prefix, ns, RDF::URI)
+
+			@rss = RDF.new(@version, @encoding, @standalone)
+			@rss.do_validate = @do_validate
+			@rss.xml_stylesheets = @xml_stylesheets
+			@last_element = @rss
+			@proc_stack.push Proc.new { |text, tags|
+				@rss.validate_for_stream(tags) if @do_validate
+			}
+		end
+	end
+
 end

lib/rss/2.0.rb

@@ -135,6 +135,7 @@ EOT
 # 			check_ns(tag_name, prefix, ns, Rss::URI)
 			
 			@rss = Rss.new(attrs['version'], @version, @encoding, @standalone)
+			@rss.xml_stylesheets = @xml_stylesheets
 			@last_element = @rss
 			@proc_stack.push Proc.new { |text, tags|
 				@rss.validate_for_stream(tags) if @do_validate

lib/rss/converter.rb

@@ -25,8 +25,8 @@ module RSS
 			value
 		end
 
-		def def_convert()
-			instance_eval(<<-EOC, *get_file_and_line_from_caller(0))
+		def def_convert(depth=0)
+			instance_eval(<<-EOC, *get_file_and_line_from_caller(depth))
 			def convert(value)
 				if value.kind_of?(String)
 					#{yield('value')}
@@ -37,10 +37,10 @@ module RSS
 			EOC
 		end
 
-		def def_iconv_convert(to_enc, from_enc)
+		def def_iconv_convert(to_enc, from_enc, depth=0)
 			begin
 				require "iconv"
-				def_convert do |value|
+				def_convert(depth+1) do |value|
 					<<-EOC
 					@iconv ||= Iconv.new("#{to_enc}", "#{from_enc}")
 					begin
@@ -68,7 +68,7 @@ module RSS
 		def def_uconv_convert_if_can(meth, to_enc, from_enc)
 			begin
 				require "uconv"
-				def_convert do |value|
+				def_convert(1) do |value|
 					<<-EOC
 					begin
 						Uconv.#{meth}(#{value})
@@ -78,7 +78,7 @@ module RSS
 					EOC
 				end
 			rescue LoadError
-				def_iconv_convert(to_enc, from_enc)
+				def_iconv_convert(to_enc, from_enc, 1)
 			end
 		end
 

lib/rss/parser.rb

@@ -191,12 +191,22 @@ module RSS
 			@proc_stack = []
 			@last_element = nil
 			@version = @encoding = @standalone = nil
+			@xml_stylesheets = []
 		end
 		
 		def xmldecl(version, encoding, standalone)
 			@version, @encoding, @standalone = version, encoding, standalone
 		end
 
+		def instruction(name, content)
+			if name == "xml-stylesheet"
+				params = parse_pi_content(content)
+				if params.has_key?("href")
+					@xml_stylesheets << XMLStyleSheet.new(*params)
+				end
+			end
+		end
+
 		def tag_start(name, attributes)
 			@text_stack.push('')
 
@@ -204,7 +214,7 @@ module RSS
 			attrs = {}
 			attributes.each do |n, v|
 				if n =~ /\Axmlns:?/
-					ns[$'] = v # $' is post match 
+					ns[$POSTMATCH] = v
 				else
 					attrs[n] = v
 				end
@@ -238,15 +248,13 @@ module RSS
 
 		private
 
-		def start_RDF(tag_name, prefix, attrs, ns)
-			check_ns(tag_name, prefix, ns, RDF::URI)
-
-			@rss = RDF.new(@version, @encoding, @standalone)
-			@rss.do_validate = @do_validate
-			@last_element = @rss
-			@proc_stack.push Proc.new { |text, tags|
-				@rss.validate_for_stream(tags) if @do_validate
-			}
+		CONTENT_PATTERN = /\s*([^=]+)=(["'])([^\2]+?)\2/
+		def parse_pi_content(content)
+			params = {}
+			content.scan(CONTENT_PATTERN) do |name, quote, value|
+				params[name] = value
+			end
+			params
 		end
 
 		def start_else_element(local, prefix, attrs, ns)

lib/rss/rss.rb

@@ -1,7 +1,9 @@
 require "time"
 
+require "English"
 require "rss/utils"
 require "rss/converter"
+require "rss/xml-stylesheet"
 
 module RSS
 
@@ -365,7 +367,6 @@ EOC
 
 		def initialize(do_validate=true)
 			@converter = nil
-			@output_encoding = nil
 			@do_validate = do_validate
 			initialize_variables
 		end
@@ -561,4 +562,44 @@ EOC
 
 	end
 
+	module RootElementMixin
+
+		attr_reader :output_encoding
+
+		def initialize(rss_version, version=nil, encoding=nil, standalone=nil)
+			super()
+			@rss_version = rss_version
+			@version = version || '1.0'
+			@encoding = encoding
+			@standalone = standalone
+			@output_encoding = nil
+		end
+
+		def output_encoding=(enc)
+			@output_encoding = enc
+			self.converter = Converter.new(@output_encoding, @encoding)
+		end
+
+		private
+		def xmldecl
+			rv = %Q[<?xml version="#{@version}"]
+			if @output_encoding or @encoding
+				rv << %Q[ encoding="#{@output_encoding or @encoding}"]
+			end
+			rv << %Q[ standalone="#{@standalone}"] if @standalone
+			rv << '?>'
+			rv
+		end
+		
+		def ns_declaration
+			rv = ''
+			self.class::NSPOOL.each do |prefix, uri|
+				prefix = ":#{prefix}" unless prefix.empty?
+				rv << %Q|\n\txmlns#{prefix}="#{html_escape(uri)}"|
+			end
+			rv
+		end
+		
+	end
+
 end

lib/rss/utils.rb

@@ -3,10 +3,8 @@ module RSS
 	module Utils
 
 		def get_file_and_line_from_caller(i=0)
-			tmp = caller[i].split(':')
-			line = tmp.pop.to_i
-			file = tmp.join(':')
-			[file, line]
+			file, line, = caller[i].split(':')
+			[file, line.to_i]
 		end
 
 		def html_escape(s)

lib/rss/xml-stylesheet.rb

@@ -0,0 +1,94 @@
+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)
+			@do_validate = true
+			ATTRIBUTES.each do |attr|
+				self.send("#{attr}=", nil)
+			end
+			vars = ATTRIBUTES.dup
+			vars.unshift(:do_validate)
+			attrs.each do |name, value|
+				if vars.include?(name.to_s)
+					self.send("#{name}=", value)
+				end
+			end
+		end
+
+		def to_s
+			rv = ""
+			if @href
+				rv << %Q[<?xml-stylesheet]
+				ATTRIBUTES.each do |name|
+					if self.send(name)
+						rv << %Q[ #{name}="#{h self.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
+
+		private
+		def guess_type(filename)
+			/\.([^.]+)/ =~ filename
+			GUESS_TABLE[$1]
+		end
+
+	end
+end

lib/rss/xmlparser.rb

@@ -1,3 +1,9 @@
+begin
+	require "xml/parser"
+rescue LoadError
+	require "xmlparser"
+end
+
 begin
 	require "xml/encoding-ja"
 rescue LoadError
@@ -15,7 +21,7 @@ module RSS
 	
 	class REXMLLikeXMLParser < ::XML::Parser
 		
-		include XML::Encoding_ja
+		include ::XML::Encoding_ja
 
 		def listener=(listener)
 			@listener = listener
@@ -37,6 +43,10 @@ module RSS
 			@listener.xmldecl(version, encoding, standalone == 1)
 		end
 
+		def processingInstruction(target, content)
+			@listener.instruction(target, content)
+		end
+
 	end
 
 	class XMLParserParser < BaseParser
@@ -51,7 +61,7 @@ module RSS
 				parser = REXMLLikeXMLParser.new
 				parser.listener = @listener
 				parser.parse(@rss)
-			rescue XMLParserError => e
+			rescue ::XML::Parser::Error => e
 				raise NotWellFormedError.new(parser.line){e.message}
 			end
 		end

lib/rss/xmlscanner.rb

@@ -48,6 +48,7 @@ module RSS
 			xmldecl(@version, @encoding, @standalone)
     end
 
+		alias_method(:on_pi, :instruction)
 		alias_method(:on_chardata, :text)
 		alias_method(:on_cdata, :text)