protected function appendMobileInputMode()
 {
     parent::appendMobileInputMode();
     foreach ($this as $k => $v) {
         $widget = $this->widgetSchema[$k];
         $validator = $this->validatorSchema[$k];
         if (!$widget instanceof sfWidgetFormInput) {
             continue;
         }
         if ($validator instanceof sfValidatorAnd) {
             foreach ($validator->getValidators() as $childValidator) {
                 if ($childValidator instanceof sfValidatorEmail) {
                     opToolkit::appendMobileInputModeAttributesForFormWidget($widget, 'alphabet');
                 } elseif ($childValidator instanceof sfValidatorNumber) {
                     opToolkit::appendMobileInputModeAttributesForFormWidget($widget, 'numeric');
                 }
             }
         }
     }
 }