class String
  def json_escape
    ERB::Util.json_escape self
  end
  
  def html_escape
    # ERB::Util.html_escape self
    Rack::Utils.escape_html self
  end
  
  JS_ESCAPE_MAP = {
    '\\'    => '\\\\',
    '</'    => '<\/',
    "\r\n"  => '\n',
    "\n"    => '\n',
    "\r"    => '\n',
    '"'     => '\\"',
    "'"     => "\\'" 
  }  
  def js_escape
    gsub(/(\\|<\/|\r\n|[\n\r"'])/){JS_ESCAPE_MAP[$1]}
  end
  
  # String marks, like :format, :safe 
  def marks; @marks ||= OpenObject.new end
end