gistfile1.php

<?php
/**
* 
*/
class noeWidgetFormTextarea extends sfWidgetFormTextarea
{
  const CUSTOM_ATTRIBUTES_KEY = 'fieldAttributes';
  
  public function render($name, $value = null, $attributes = array(), $errors = array())
  {
    if ($this->hasCustomFieldAttributes())
    {
      $this->setAttribute('class', 'use_tinyMCE');
    }
    return parent::render($name, $value, $attributes, $errors);
  }
  
  protected function hasCustomFieldAttributes()
  {
    return !is_null($this->getAttribute(self::CUSTOM_ATTRIBUTES_KEY));
  }
}