Class: Dryml::Parser::TreeParser

Inherits:
REXML::Parsers::TreeParser
  • Object
show all
Defined in:
lib/dryml/parser/tree_parser.rb

Instance Method Summary collapse

Constructor Details

#initialize(source, build_context = Document.new) ⇒ TreeParser

Returns a new instance of TreeParser.



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# File 'lib/dryml/parser/tree_parser.rb', line 4

def initialize( source, build_context = Document.new )
  @build_context = build_context
  @parser = Dryml::Parser::BaseParser.new(source)
end

Instance Method Details

#parse ⇒ Object 



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# File 'lib/dryml/parser/tree_parser.rb', line 10

def parse
  tag_stack = []
  in_doctype = false
  entities = nil
  begin
    while true
      event = @parser.pull
      #STDERR.puts "TREEPARSER GOT #{event.inspect}"
      case event[0]
      when :end_document
        unless tag_stack.empty?
          #raise ParseException.new("No close tag for #{tag_stack.inspect}")
          raise ParseException.new("No close tag for #{@build_context.xpath}")
        end
        return
      when :start_element
        tag_stack.push(event[1])
        el = @build_context = @build_context.add_element( event[1] )
        event[2].each do |key, value|
          el.attributes[key]=Dryml::Parser::Attribute.new(key,value,self)
        end
        @build_context.start_tag_source = event[3]
        @build_context.source_offset = event[4]
      when :end_element
        tag_stack.pop
        @build_context.has_end_tag = event[2]
        @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(
                               Dryml::Parser::Text.new(event[1], @build_context.whitespace, nil, true)
                               ) unless (
                                         @build_context.ignore_whitespace_nodes and
                                         event[1].strip.size==0
                                         )
          end
        end
      when :comment
        c = REXML::Comment.new( event[1] )
        @build_context.add( c )
      when :cdata
        c = REXML::CData.new( event[1] )
        @build_context.add( c )
      when :processing_instruction
        @build_context.add( REXML::Instruction.new( event[1], event[2] ) )
      end
    end
  rescue REXML::Validation::ValidationException
    raise
  rescue
    raise REXML::ParseException.new( $!.message, @parser.source, @parser, $! )
  end
end