/**
* Render a form <input> element from the provided $element
*
* @param ElementInterface $element
* @throws Exception\DomainException
* @return string
*/
public function render(ElementInterface $element)
{
$src = $element->getAttribute('src');
if (empty($src)) {
throw new Exception\DomainException(sprintf('%s requires that the element has an assigned src; none discovered', __METHOD__));
}
return parent::render($element);
}
/**
* Generate an opening label tag
* @param null|array|ElementInterface $attributesOrElement
* @return string
*/
public function openTag($attributesOrElement = null)
{
$labelAttributes = array();
if ($attributesOrElement instanceof LabelOptionsAwareInterface) {
$labelAttributes = $attributesOrElement->getLabelAttributes();
}
$labelAttributes['class'] = 'btn' . (empty($labelAttributes['class']) ? '' : ' ' . $labelAttributes['class']);
return parent::openTag($labelAttributes);
}