Initial revision

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@3925 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 56 insertions, 0 deletions

diff --git a/lib/rexml/parsers/lightparser.rb b/lib/rexml/parsers/lightparser.rb
new file mode 100644
index 000000000..e2f083bc8
--- /dev/null
+++ b/lib/rexml/parsers/lightparser.rb
@@ -0,0 +1,56 @@
+require 'rexml/parsers/streamparser'
+require 'rexml/parsers/baseparser'
+require 'rexml/light/node'
+
+module REXML
+	module Parsers
+		class LightParser
+			def initialize stream
+				@stream = stream
+				@parser = REXML::Parsers::BaseParser.new( stream )
+			end
+
+      def rewind
+        @stream.rewind
+        @parser.stream = @stream
+      end
+
+			def parse
+				root = context = REXML::Light::Node.new([ :document ])
+				while true
+					event = @parser.pull
+					case event[0]
+					when :end_document
+						break
+					when :end_doctype
+						context = context.parent
+					when :start_element, :start_doctype
+						new_node = REXML::Light::Node.new(event)
+						context << new_node
+						new_node.parent = context
+						context = new_node
+					when :end_element, :end_doctype
+						context = context.parent
+					else
+						new_node = REXML::Light::Node.new(event)
+						context << new_node
+						new_node.parent = context
+					end
+				end
+				root
+			end
+		end
+
+		# An element is an array.  The array contains:
+		#  0			The parent element
+		#  1			The tag name
+		#  2			A hash of attributes
+		#  3..-1	The child elements
+		# An element is an array of size > 3
+		# Text is a String
+		# PIs are [ :processing_instruction, target, data ]
+		# Comments are [ :comment, data ]
+		# DocTypes are DocType structs
+		# The root is an array with XMLDecls, Text, DocType, Array, Text
+	end
+end