# File lib/rexml/parsers/treeparser.rb, line 6
6:       def initialize( source, build_context = Document.new )
7:         @build_context = build_context
8:         @parser = Parsers::BaseParser.new( source )
9:       end

    # File lib/rexml/parsers/treeparser.rb, line 11
11:       def add_listener( listener )
12:         @parser.add_listener( listener )
13:       end

    # File lib/rexml/parsers/treeparser.rb, line 15
15:       def parse
16:         tag_stack = []
17:         in_doctype = false
18:         entities = nil
19:         begin
20:           while true
21:             event = @parser.pull
22:             #STDERR.puts "TREEPARSER GOT #{event.inspect}"
23:             case event[0]
24:             when :end_document
25:               unless tag_stack.empty?
26:                 #raise ParseException.new("No close tag for #{tag_stack.inspect}")
27:                 raise ParseException.new("No close tag for #{@build_context.xpath}")
28:               end
29:               return
30:             when :start_element
31:               tag_stack.push(event[1])
32:               # find the observers for namespaces
33:               @build_context = @build_context.add_element( event[1], event[2] )
34:             when :end_element
35:               tag_stack.pop
36:               @build_context = @build_context.parent
37:             when :text
38:               if not in_doctype
39:                 if @build_context[-1].instance_of? Text
40:                   @build_context[-1] << event[1]
41:                 else
42:                   @build_context.add( 
43:                     Text.new(event[1], @build_context.whitespace, nil, true) 
44:                   ) unless (
45:                     @build_context.ignore_whitespace_nodes and
46:                     event[1].strip.size==0
47:                   )
48:                 end
49:               end
50:             when :comment
51:               c = Comment.new( event[1] )
52:               @build_context.add( c )
53:             when :cdata
54:               c = CData.new( event[1] )
55:               @build_context.add( c )
56:             when :processing_instruction
57:               @build_context.add( Instruction.new( event[1], event[2] ) )
58:             when :end_doctype
59:               in_doctype = false
60:               entities.each { |k,v| entities[k] = @build_context.entities[k].value }
61:               @build_context = @build_context.parent
62:             when :start_doctype
63:               doctype = DocType.new( event[1..-1], @build_context )
64:               @build_context = doctype
65:               entities = {}
66:               in_doctype = true
67:             when :attlistdecl
68:               n = AttlistDecl.new( event[1..-1] )
69:               @build_context.add( n )
70:             when :externalentity
71:               n = ExternalEntity.new( event[1] )
72:               @build_context.add( n )
73:             when :elementdecl
74:               n = ElementDecl.new( event[1] )
75:               @build_context.add(n)
76:             when :entitydecl
77:               entities[ event[1] ] = event[2] unless event[2] =~ /PUBLIC|SYSTEM/
78:               @build_context.add(Entity.new(event))
79:             when :notationdecl
80:               n = NotationDecl.new( *event[1..-1] )
81:               @build_context.add( n )
82:             when :xmldecl
83:               x = XMLDecl.new( event[1], event[2], event[3] )
84:               @build_context.add( x )
85:             end
86:           end
87:         rescue REXML::Validation::ValidationException
88:           raise
89:         rescue
90:           raise ParseException.new( $!.message, @parser.source, @parser, $! )
91:         end
92:       end