/**
* Get Layout update out of collection of changes
*
* @param Mage_DesignEditor_Model_Change_Collection $collection
* @param string|null $handle
* @return string
*/
public function render(Mage_DesignEditor_Model_Change_Collection $collection, $handle = null)
{
$element = new Varien_Simplexml_Element($this->_getInitialXml());
foreach ($collection as $item) {
if ($item instanceof Mage_DesignEditor_Model_Change_LayoutAbstract) {
$this->_render($element, $item);
}
}
if ($handle && $collection->count() > 0) {
$layoutUpdate = '';
$element = $element->{$handle};
/** @var $node Varien_Simplexml_Element */
foreach ($element->children() as $node) {
$layoutUpdate .= $node->asNiceXml();
}
} else {
$layoutUpdate = $element->asNiceXml();
}
return $layoutUpdate;
}
