/**
* Create the block filter for an attribute into the layer.
*
* @param Mage_Catalog_Model_Entity_Attribute $attribute Filtered attributes.
*
* @return Mage_Catalog_Block_Layer_Filter_Abstract
*/
protected function _addFilter($attribute)
{
$decimalValidationClasses = array('validate-number', 'validate-digits');
if ($attribute->getAttributeCode() == 'price') {
$filterBlockName = $this->_priceFilterBlockName;
} elseif ($attribute->getAttributeCode() == 'rating_filter') {
$filterBlockName = $this->_ratingFilterBlockName;
} elseif ($attribute->getSourceModel() == 'eav/entity_attribute_source_boolean') {
$filterBlockName = $this->_booleanFilterBlockName;
} elseif ($attribute->getBackendType() == 'decimal' || in_array($attribute->getFrontendClass(), $decimalValidationClasses)) {
$filterBlockName = $this->_decimalFilterBlockName;
} else {
$filterBlockName = $this->_attributeFilterBlockName;
}
$filter = $this->getLayout()->createBlock($filterBlockName, $attribute->getAttributeCode() . '_filter')->setLayer($this->getLayer())->setAttributeModel($attribute)->init();
return $filter;
}
