/**
* Collect and merge layout updates from file
*
* @param string $area
* @param string $package
* @param string $theme
* @param integer|null $storeId
* @return Mage_Core_Model_Layout_Element
*/
public function getFileLayoutUpdatesXml($area, $package, $theme, $storeId = null)
{
if (null === $storeId) {
$storeId = Mage::app()->getStore()->getId();
}
/* @var $design Mage_Core_Model_Design_Package */
$design = Mage::getSingleton('core/design_package');
$layoutXml = null;
$elementClass = $this->getElementClass();
$updatesRoot = Mage::app()->getConfig()->getNode($area . '/layout/updates');
Mage::dispatchEvent('core_layout_update_updates_get_after', array('updates' => $updatesRoot));
$updates = $updatesRoot->asArray();
$themeUpdates = Mage::getSingleton('core/design_config')->getNode("{$area}/{$package}/{$theme}/layout/updates");
if ($themeUpdates && is_array($themeUpdates->asArray())) {
//array_values() to ensure that theme-specific layouts don't override, but add to module layouts
$updates = array_merge($updates, array_values($themeUpdates->asArray()));
}
$updateFiles = array();
foreach ($updates as $updateNode) {
if (!empty($updateNode['file'])) {
$module = isset($updateNode['@']['module']) ? $updateNode['@']['module'] : false;
if ($module && Mage::getStoreConfigFlag('advanced/modules_disable_output/' . $module, $storeId)) {
continue;
}
$updateFiles[] = $updateNode['file'];
}
}
// custom local layout updates file - load always last
$updateFiles[] = 'local.xml';
/**
* IDDQD: Inject custom layout files via event.
*/
$eventData = new Varien_Object(array('update_files' => $updateFiles));
Mage::dispatchEvent('before_layoutxml_compile', array('updates' => $eventData, 'god_mode' => $this));
$updateFiles = $eventData->getUpdateFiles();
$layoutStr = '';
foreach ($updateFiles as $file) {
$filename = $design->getLayoutFilename($file, array('_area' => $area, '_package' => $package, '_theme' => $theme));
if (!is_readable($filename)) {
continue;
}
$fileStr = file_get_contents($filename);
$fileStr = str_replace($this->_subst['from'], $this->_subst['to'], $fileStr);
$fileXml = simplexml_load_string($fileStr, $elementClass);
if (!$fileXml instanceof SimpleXMLElement) {
continue;
}
$layoutStr .= $fileXml->innerXml();
}
$layoutXml = simplexml_load_string('<layouts>' . $layoutStr . '</layouts>', $elementClass);
return $layoutXml;
}