Mini Shell

require "rexml/child"
module REXML
	module DTD
		class NotationDecl < Child
			START = "<!NOTATION"
			START_RE = /^\s*#{START}/um
			PUBLIC = /^\s*#{START}\s+(\w[\w-]*)\s+(PUBLIC)\s+((["']).*?\4)\s*>/um
			SYSTEM = /^\s*#{START}\s+(\w[\w-]*)\s+(SYSTEM)\s+((["']).*?\4)\s*>/um
			def initialize src
				super()
				if src.match( PUBLIC )
					md = src.match( PUBLIC, true )
				elsif src.match( SYSTEM )
					md = src.match( SYSTEM, true )
				else
					raise ParseException.new( "error parsing notation: no matching pattern", src )
				end
				@name = md[1]
				@middle = md[2]
				@rest = md[3]
			end

			def to_s
				"<!NOTATION #@name #@middle #@rest>"
			end

			def write( output, indent )
        indent( output, indent )
				output << to_s
			end

			def NotationDecl.parse_source source, listener
				md = source.match( PATTERN_RE, true )
				thing = md[0].squeeze(" \t\n\r")
				listener.send inspect.downcase, thing 
			end
		end
	end
end