#--
# DO NOT MODIFY!!!!
# This file is automatically generated by rex 1.0.5
# from lexical definition file "lib/nokogiri/css/tokenizer.rex".
#++

module Nokogiri
module CSS
class Tokenizer
  require 'strscan'

  class ScanError < StandardError ; end

  attr_reader   :lineno
  attr_reader   :filename
  attr_accessor :state

  def scan_setup(str)
    @ss = StringScanner.new(str)
    @lineno =  1
    @state  = nil
  end

  def action
    yield
  end

  def scan_str(str)
    scan_setup(str)
    do_parse
  end
  alias :scan :scan_str

  def load_file( filename )
    @filename = filename
    open(filename, "r") do |f|
      scan_setup(f.read)
    end
  end

  def scan_file( filename )
    load_file(filename)
    do_parse
  end


  def next_token
    return if @ss.eos?
    
    # skips empty actions
    until token = _next_token or @ss.eos?; end
    token
  end

  def _next_token
    text = @ss.peek(1)
    @lineno  +=  1  if text == "\n"
    token = case @state
    when nil
      case
      when (text = @ss.scan(/has\([\s]*/))
         action { [:HAS, text] }

      when (text = @ss.scan(/[-@]?([_A-Za-z]|[^\0-\177]|\\[0-9A-Fa-f]{1,6}(\r\n|[\s])?|\\[^\n\r\f0-9A-Fa-f])([_A-Za-z0-9-]|[^\0-\177]|\\[0-9A-Fa-f]{1,6}(\r\n|[\s])?|\\[^\n\r\f0-9A-Fa-f])*\([\s]*/))
         action { [:FUNCTION, text] }

      when (text = @ss.scan(/[-@]?([_A-Za-z]|[^\0-\177]|\\[0-9A-Fa-f]{1,6}(\r\n|[\s])?|\\[^\n\r\f0-9A-Fa-f])([_A-Za-z0-9-]|[^\0-\177]|\\[0-9A-Fa-f]{1,6}(\r\n|[\s])?|\\[^\n\r\f0-9A-Fa-f])*/))
         action { [:IDENT, text] }

      when (text = @ss.scan(/\#([_A-Za-z0-9-]|[^\0-\177]|\\[0-9A-Fa-f]{1,6}(\r\n|[\s])?|\\[^\n\r\f0-9A-Fa-f])+/))
         action { [:HASH, text] }

      when (text = @ss.scan(/[\s]*~=[\s]*/))
         action { [:INCLUDES, text] }

      when (text = @ss.scan(/[\s]*\|=[\s]*/))
         action { [:DASHMATCH, text] }

      when (text = @ss.scan(/[\s]*\^=[\s]*/))
         action { [:PREFIXMATCH, text] }

      when (text = @ss.scan(/[\s]*\$=[\s]*/))
         action { [:SUFFIXMATCH, text] }

      when (text = @ss.scan(/[\s]*\*=[\s]*/))
         action { [:SUBSTRINGMATCH, text] }

      when (text = @ss.scan(/[\s]*!=[\s]*/))
         action { [:NOT_EQUAL, text] }

      when (text = @ss.scan(/[\s]*=[\s]*/))
         action { [:EQUAL, text] }

      when (text = @ss.scan(/[\s]*\)/))
         action { [:RPAREN, text] }

      when (text = @ss.scan(/[\s]*\[[\s]*/))
         action { [:LSQUARE, text] }

      when (text = @ss.scan(/[\s]*\]/))
         action { [:RSQUARE, text] }

      when (text = @ss.scan(/[\s]*\+[\s]*/))
         action { [:PLUS, text] }

      when (text = @ss.scan(/[\s]*>[\s]*/))
         action { [:GREATER, text] }

      when (text = @ss.scan(/[\s]*,[\s]*/))
         action { [:COMMA, text] }

      when (text = @ss.scan(/[\s]*~[\s]*/))
         action { [:TILDE, text] }

      when (text = @ss.scan(/\:not\([\s]*/))
         action { [:NOT, text] }

      when (text = @ss.scan(/-?([0-9]+|[0-9]*\.[0-9]+)/))
         action { [:NUMBER, text] }

      when (text = @ss.scan(/[\s]*\/\/[\s]*/))
         action { [:DOUBLESLASH, text] }

      when (text = @ss.scan(/[\s]*\/[\s]*/))
         action { [:SLASH, text] }

      when (text = @ss.scan(/U\+[0-9a-f?]{1,6}(-[0-9a-f]{1,6})?/))
         action {[:UNICODE_RANGE, text] }

      when (text = @ss.scan(/[\s]+/))
         action { [:S, text] }

      when (text = @ss.scan(/"([^\n\r\f"]|\n|\r\n|\r|\f|[^\0-\177]|\\[0-9A-Fa-f]{1,6}(\r\n|[\s])?|\\[^\n\r\f0-9A-Fa-f])*"|'([^\n\r\f']|\n|\r\n|\r|\f|[^\0-\177]|\\[0-9A-Fa-f]{1,6}(\r\n|[\s])?|\\[^\n\r\f0-9A-Fa-f])*'/))
         action { [:STRING, text] }

      when (text = @ss.scan(/./))
         action { [text, text] }

      else
        text = @ss.string[@ss.pos .. -1]
        raise  ScanError, "can not match: '" + text + "'"
      end  # if

    else
      raise  ScanError, "undefined state: '" + state.to_s + "'"
    end  # case state
    token
  end  # def _next_token

end # class
end
end
