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?? ..
?? attlistdecl.rb(1.79 KB)
?? attribute.rb(5.02 KB)
?? cdata.rb(1.44 KB)
?? child.rb(2.46 KB)
?? comment.rb(2 KB)
?? doctype.rb(6.64 KB)
?? document.rb(7.93 KB)
?? dtd
?? element.rb(43.24 KB)
?? encoding.rb(2.08 KB)
?? encodings
?? entity.rb(4.85 KB)
?? formatters
?? functions.rb(10.8 KB)
?? instruction.rb(1.9 KB)
?? light
?? namespace.rb(1018 B)
?? node.rb(1.93 KB)
?? output.rb(385 B)
?? parent.rb(4.4 KB)
?? parseexception.rb(1.2 KB)
?? parsers
?? quickpath.rb(7.65 KB)
?? rexml.rb(1.71 KB)
?? sax2listener.rb(3.45 KB)
?? source.rb(7.06 KB)
?? streamlistener.rb(3.71 KB)
?? syncenumerator.rb(721 B)
?? text.rb(11.15 KB)
?? undefinednamespaceexception.rb(210 B)
?? validation
?? xmldecl.rb(2.65 KB)
?? xmltokens.rb(506 B)
?? xpath.rb(2.39 KB)
?? xpath_parser.rb(25.15 KB)

Editing: entity.rb

require 'rexml/child'
require 'rexml/source'
require 'rexml/xmltokens'

module REXML
	# God, I hate DTDs.  I really do.  Why this idiot standard still
	# plagues us is beyond me.
	class Entity < Child
		include XMLTokens
		PUBIDCHAR = "\x20\x0D\x0Aa-zA-Z0-9\\-()+,./:=?;!*@$_%#"
		SYSTEMLITERAL = %Q{((?:"[^"]*")|(?:'[^']*'))}
		PUBIDLITERAL = %Q{("[#{PUBIDCHAR}']*"|'[#{PUBIDCHAR}]*')}
		EXTERNALID = "(?:(?:(SYSTEM)\\s+#{SYSTEMLITERAL})|(?:(PUBLIC)\\s+#{PUBIDLITERAL}\\s+#{SYSTEMLITERAL}))"
		NDATADECL = "\\s+NDATA\\s+#{NAME}"
		PEREFERENCE = "%#{NAME};"
		ENTITYVALUE = %Q{((?:"(?:[^%&"]|#{PEREFERENCE}|#{REFERENCE})*")|(?:'([^%&']|#{PEREFERENCE}|#{REFERENCE})*'))}
		PEDEF = "(?:#{ENTITYVALUE}|#{EXTERNALID})"
		ENTITYDEF = "(?:#{ENTITYVALUE}|(?:#{EXTERNALID}(#{NDATADECL})?))"
		PEDECL = "<!ENTITY\\s+(%)\\s+#{NAME}\\s+#{PEDEF}\\s*>"
		GEDECL = "<!ENTITY\\s+#{NAME}\\s+#{ENTITYDEF}\\s*>"
		ENTITYDECL = /\s*(?:#{GEDECL})|(?:#{PEDECL})/um

attr_reader :name, :external, :ref, :ndata, :pubid

# Create a new entity.  Simple entities can be constructed by passing a
		# name, value to the constructor; this creates a generic, plain entity
		# reference. For anything more complicated, you have to pass a Source to
		# the constructor with the entity definiton, or use the accessor methods.
		# +WARNING+: There is no validation of entity state except when the entity
		# is read from a stream.  If you start poking around with the accessors,
		# you can easily create a non-conformant Entity.  The best thing to do is
		# dump the stupid DTDs and use XMLSchema instead.
		# 
		#  e = Entity.new( 'amp', '&' )
		def initialize stream, value=nil, parent=nil, reference=false
			super(parent)
			@ndata = @pubid = @value = @external = nil
			if stream.kind_of? Array
				@name = stream[1]
				if stream[-1] == '%'
					@reference = true 
					stream.pop
				else
					@reference = false
				end
				if stream[2] =~ /SYSTEM|PUBLIC/
					@external = stream[2]
					if @external == 'SYSTEM'
						@ref = stream[3]
						@ndata = stream[4] if stream.size == 5
					else
						@pubid = stream[3]
						@ref = stream[4]
					end
				else
					@value = stream[2]
				end
			else
				@reference = reference
				@external = nil
				@name = stream
				@value = value
			end
		end

# Evaluates whether the given string matchs an entity definition,
		# returning true if so, and false otherwise.
		def Entity::matches? string
			(ENTITYDECL =~ string) == 0
		end

# Evaluates to the unnormalized value of this entity; that is, replacing
		# all entities -- both %ent; and &ent; entities.  This differs from
		# +value()+ in that +value+ only replaces %ent; entities.
		def unnormalized
                        document.record_entity_expansion unless document.nil?
			v = value()
			return nil if v.nil?
			@unnormalized = Text::unnormalize(v, parent)
			@unnormalized
		end

#once :unnormalized

# Returns the value of this entity unprocessed -- raw.  This is the
		# normalized value; that is, with all %ent; and &ent; entities intact
		def normalized
			@value
		end

# Write out a fully formed, correct entity definition (assuming the Entity
		# object itself is valid.)
    #
    # out::
    #   An object implementing <TT>&lt;&lt;<TT> to which the entity will be
    #   output
    # indent::
    #   *DEPRECATED* and ignored
		def write out, indent=-1
			out << '<!ENTITY '
			out << '% ' if @reference
			out << @name
			out << ' '
			if @external
				out << @external << ' '
				if @pubid
					q = @pubid.include?('"')?"'":'"'
					out << q << @pubid << q << ' '
				end
				q = @ref.include?('"')?"'":'"'
				out << q << @ref << q
				out << ' NDATA ' << @ndata if @ndata
			else
				q = @value.include?('"')?"'":'"'
				out << q << @value << q
			end
			out << '>'
		end

# Returns this entity as a string.  See write().
		def to_s
			rv = ''
			write rv
			rv
		end

PEREFERENCE_RE = /#{PEREFERENCE}/um
		# Returns the value of this entity.  At the moment, only internal entities
		# are processed.  If the value contains internal references (IE,
		# %blah;), those are replaced with their values.  IE, if the doctype
		# contains:
		#  <!ENTITY % foo "bar">
		#  <!ENTITY yada "nanoo %foo; nanoo>
		# then:
		#  doctype.entity('yada').value   #-> "nanoo bar nanoo"
		def value
			if @value
				matches = @value.scan(PEREFERENCE_RE)
				rv = @value.clone
				if @parent
					matches.each do |entity_reference|
						entity_value = @parent.entity( entity_reference[0] )
						rv.gsub!( /%#{entity_reference};/um, entity_value )
					end
				end
				return rv
			end
			nil
		end
	end

# This is a set of entity constants -- the ones defined in the XML
	# specification.  These are +gt+, +lt+, +amp+, +quot+ and +apos+.
	module EntityConst
		# +>+
		GT = Entity.new( 'gt', '>' )
		# +<+
		LT = Entity.new( 'lt', '<' )
		# +&+
		AMP = Entity.new( 'amp', '&' )
		# +"+
		QUOT = Entity.new( 'quot', '"' )
		# +'+
		APOS = Entity.new( 'apos', "'" )
	end
end

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Editing: entity.rb

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