This commit was manufactured by cvs2svn to create branch 'ruby_1_8'.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_8@6578 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 90 insertions, 0 deletions

diff --git a/lib/rexml/parsers/treeparser.rb b/lib/rexml/parsers/treeparser.rb
new file mode 100644
index 000000000..57d11f7e2
--- /dev/null
+++ b/lib/rexml/parsers/treeparser.rb
@@ -0,0 +1,90 @@
+require 'rexml/validation/validationexception'
+
+module REXML
+  module Parsers
+    class TreeParser
+      def initialize( source, build_context = Document.new )
+        @build_context = build_context
+        @parser = Parsers::BaseParser.new( source )
+      end
+
+      def add_listener( listener )
+        @parser.add_listener( listener )
+      end
+
+      def parse
+        tag_stack = []
+        in_doctype = false
+        entities = nil
+        begin
+          while true
+            event = @parser.pull
+            case event[0]
+            when :end_document
+              return
+            when :start_element
+              tag_stack.push(event[1])
+              # find the observers for namespaces
+              @build_context = @build_context.add_element( event[1], event[2] )
+            when :end_element
+              tag_stack.pop
+              @build_context = @build_context.parent
+            when :text
+              if not in_doctype
+                if @build_context[-1].instance_of? Text
+                  @build_context[-1] << event[1]
+                else
+                  @build_context.add( 
+                    Text.new( event[1], @build_context.whitespace, nil, true ) 
+                  ) unless (
+                    event[1].strip.size==0 and 
+                    @build_context.ignore_whitespace_nodes
+                  )
+                end
+              end
+            when :comment
+              c = Comment.new( event[1] )
+              @build_context.add( c )
+            when :cdata
+              c = CData.new( event[1] )
+              @build_context.add( c )
+            when :processing_instruction
+              @build_context.add( Instruction.new( event[1], event[2] ) )
+            when :end_doctype
+              in_doctype = false
+              entities.each { |k,v| entities[k] = @build_context.entities[k].value }
+              @build_context = @build_context.parent
+            when :start_doctype
+              doctype = DocType.new( event[1..-1], @build_context )
+              @build_context = doctype
+              entities = {}
+              in_doctype = true
+            when :attlistdecl
+              n = AttlistDecl.new( event[1..-1] )
+              @build_context.add( n )
+            when :externalentity
+              n = ExternalEntity.new( event[1] )
+              @build_context.add( n )
+            when :elementdecl
+              n = ElementDecl.new( event[1] )
+              @build_context.add(n)
+            when :entitydecl
+              entities[ event[1] ] = event[2] unless event[2] =~ /PUBLIC|SYSTEM/
+              @build_context.add(Entity.new(event))
+            when :notationdecl
+              n = NotationDecl.new( *event[1..-1] )
+              @build_context.add( n )
+            when :xmldecl
+              x = XMLDecl.new( event[1], event[2], event[3] )
+              @build_context.add( x )
+            end
+          end
+        rescue REXML::Validation::ValidationException
+          raise
+        rescue
+          raise ParseException.new( $!.message, @parser.source, @parser, $! )
+        end
+      end
+    end
+  end
+end