/tools/Ruby/lib/ruby/1.8/rexml/dtd/entitydecl.rb

 1require "rexml/child"
 2module REXML
 3	module DTD
 4		class EntityDecl < Child
 5			START = "<!ENTITY"
 6			START_RE = /^\s*#{START}/um
 7			PUBLIC = /^\s*#{START}\s+(?:%\s+)?(\w+)\s+PUBLIC\s+((["']).*?\3)\s+((["']).*?\5)\s*>/um
 8			SYSTEM = /^\s*#{START}\s+(?:%\s+)?(\w+)\s+SYSTEM\s+((["']).*?\3)(?:\s+NDATA\s+\w+)?\s*>/um
 9			PLAIN = /^\s*#{START}\s+(\w+)\s+((["']).*?\3)\s*>/um
10			PERCENT = /^\s*#{START}\s+%\s+(\w+)\s+((["']).*?\3)\s*>/um
11			# <!ENTITY name SYSTEM "...">
12			# <!ENTITY name "...">
13			def initialize src
14				super()
15				md = nil
16				if src.match( PUBLIC )
17					md = src.match( PUBLIC, true )
18					@middle = "PUBLIC"
19					@content = "#{md[2]} #{md[4]}"
20				elsif src.match( SYSTEM )
21					md = src.match( SYSTEM, true )
22					@middle = "SYSTEM"
23					@content = md[2]
24				elsif src.match( PLAIN )
25					md = src.match( PLAIN, true )
26					@middle = ""
27					@content = md[2]
28				elsif src.match( PERCENT )
29					md = src.match( PERCENT, true )
30					@middle = ""
31					@content = md[2]
32				end
33				raise ParseException.new("failed Entity match", src) if md.nil?
34				@name = md[1]
35			end
36
37			def to_s
38				rv = "<!ENTITY #@name "
39				rv << "#@middle " if @middle.size > 0
40				rv << @content
41				rv
42			end
43
44			def write( output, indent )
45        indent( output, indent )
46				output << to_s
47			end
48
49			def EntityDecl.parse_source source, listener
50				md = source.match( PATTERN_RE, true )
51				thing = md[0].squeeze(" \t\n\r")
52				listener.send inspect.downcase, thing 
53			end
54		end
55	end
56end