root/trunk/lib/form/shared/BaseForm.class.php

<?php
/**
 * Symfonians base non-Propel form class
 *
 */
class BaseForm extends sfForm
{
  const REQUIRED_CLASS_NAME = 'required';

  /**
   * Public constructor
   *
   * @see sfForm
   */
  public function __construct($defaults = array(), $options = array(), $CSRFSecret = null)
  {
    parent::__construct($defaults, $options, $CSRFSecret);

    $this->postSetup();
  }

  /**
   * Post setup final method, cannot be overriden
   *
   */
  final private function postSetup()
  {
    $this->handleRequiredFields();
  }

  /**
   * Adds a CSS class name to required widgets
   *
   */
  protected function handleRequiredFields()
  {
    if (!$this->validatorSchema)
    {
      return;
    }

    foreach ($this->validatorSchema->getFields() as $fieldName => $validator)
    {
      /* @var $validator sfValidatorBase */
      if (true === $validator->getOption('required'))
      {
        if (!array_key_exists($fieldName, $this->widgetSchema->getFields()))
        {
          continue;
        }

        /* @var $widget sfWidget */
        $widget = $this->widgetSchema[$fieldName];

        $class = trim($widget->getAttribute('class'));

        if (!$class)
        {
          $class = self::REQUIRED_CLASS_NAME;
        }
        else if (!preg_match(sprintf('/%s/i', self::REQUIRED_CLASS_NAME), $class))
        {
          $class = sprintf('%s%s', $class, self::REQUIRED_CLASS_NAME);
        }

        $widget->setAttribute('class', $class);
      }
    }
  }
}