require 'assert_valid_content/validator'

# Validates using LibXML via the libxml-ruby[http://libxml.rubyforge.org/] gem.
module AssertValidContent::LibXML

# +true+ if required dependencies are installed
Installed = begin
  gem( 'libxml-ruby', '~> 1.1' )
  require 'libxml'
  true
rescue Gem::LoadError
  false
end

# Validates HTML and XHTML
class AssertValidContent::LibXML::HTML < AssertValidContent::Validator
  def validate( content )  #:nodoc:
    ::LibXML::XML::Error.set_handler { |err|  @errors << err  }
    begin
      doc = self.parser( content ).parse
    rescue ::LibXML::XML::Error ; end
  end

protected
  def parser( content )  #:nodoc:
    ::LibXML::XML::HTMLParser.string content
  end
end

# Validates XML
class AssertValidContent::LibXML::XML < HTML
protected
  def parser( content )  #:nodoc:
    ::LibXML::XML::Parser.string content
  end
end

end