/**
* Add necessary options
*
* @return \Magento\Framework\View\Element\AbstractBlock
*/
protected function _beforeToHtml()
{
if (!$this->getOptions()) {
$layoutMergeParams = array('theme' => $this->_getThemeInstance($this->getTheme()));
/** @var $layoutProcessor \Magento\Framework\View\Layout\ProcessorInterface */
$layoutProcessor = $this->_layoutProcessorFactory->create($layoutMergeParams);
$layoutProcessor->addPageHandles(array($this->getLayoutHandle()));
$layoutProcessor->addPageHandles(array('default'));
$layoutProcessor->load();
$containers = $layoutProcessor->getContainers();
if ($this->getAllowedContainers()) {
foreach (array_keys($containers) as $containerName) {
if (!in_array($containerName, $this->getAllowedContainers())) {
unset($containers[$containerName]);
}
}
}
asort($containers, SORT_STRING);
$this->addOption('', __('-- Please Select --'));
foreach ($containers as $containerName => $containerLabel) {
$this->addOption($containerName, $containerLabel);
}
}
return parent::_beforeToHtml();
}
/**
* Retrieve the layout update instance
*
* @return \Magento\Framework\View\Layout\ProcessorInterface
*/
protected function getPageLayoutMerge()
{
if ($this->pageLayoutMerge) {
return $this->pageLayoutMerge;
}
$this->pageLayoutMerge = $this->processorFactory->create(['theme' => $this->themeResolver->get(), 'fileSource' => $this->pageLayoutFileSource, 'cacheSuffix' => self::MERGE_CACHE_SUFFIX]);
return $this->pageLayoutMerge;
}
/**
* Retrieve the layout update instance
*
* @return \Magento\Framework\View\Layout\ProcessorInterface
*/
public function getUpdate()
{
if (!$this->_update) {
$theme = $this->themeResolver->get();
$this->_update = $this->_processorFactory->create(['theme' => $theme]);
}
return $this->_update;
}
/**
* Get CSS files of a given theme
*
* Returns an associative array of local assets with FileId used as keys:
* array('Magento_Catalog::widgets.css' => \Magento\Framework\View\Asset\LocalInterface)
* The array will be sorted by keys
*
* @param \Magento\Framework\View\Design\ThemeInterface $theme
* @return \Magento\Framework\View\Asset\LocalInterface[]
*/
public function getCssAssets($theme)
{
/** @var $layoutProcessor \Magento\Framework\View\Layout\ProcessorInterface */
$layoutProcessor = $this->_layoutProcessorFactory->create(['theme' => $theme]);
$layoutElement = $layoutProcessor->getFileLayoutUpdatesXml();
/**
* XPath selector to get CSS files from layout added for HEAD block directly
*/
$xpathSelectorBlocks = '//block[@class="Magento\\Theme\\Block\\Html\\Head"]' . '/block[@class="Magento\\Theme\\Block\\Html\\Head\\Css"]/arguments/argument[@name="file"]';
/**
* XPath selector to get CSS files from layout added for HEAD block using reference
*/
$xpathSelectorRefs = '//referenceBlock[@name="head"]' . '/block[@class="Magento\\Theme\\Block\\Html\\Head\\Css"]/arguments/argument[@name="file"]';
$elements = array_merge($layoutElement->xpath($xpathSelectorBlocks) ?: [], $layoutElement->xpath($xpathSelectorRefs) ?: []);
$params = ['area' => $theme->getArea(), 'themeModel' => $theme];
$result = [];
foreach ($elements as $fileId) {
$fileId = (string) $fileId;
$result[$fileId] = $this->_assetRepo->createAsset($fileId, $params);
}
ksort($result);
return $result;
}
/**
* Add design abstractions information to the options
*
* @param array $designAbstractions
* @return void
*/
protected function _addDesignAbstractionOptions(array $designAbstractions)
{
$label = array();
// Sort list of design abstractions by label
foreach ($designAbstractions as $key => $row) {
$label[$key] = $row['label'];
}
array_multisort($label, SORT_STRING, $designAbstractions);
// Group the layout options
$customLayouts = array();
$pageLayouts = array();
/** @var $layoutProcessor \Magento\Framework\View\Layout\ProcessorInterface */
$layoutProcessor = $this->_layoutProcessorFactory->create();
foreach ($designAbstractions as $pageTypeName => $pageTypeInfo) {
if ($layoutProcessor->isPageLayoutDesignAbstraction($pageTypeInfo)) {
$pageLayouts[] = array('value' => $pageTypeName, 'label' => $pageTypeInfo['label']);
} else {
$customLayouts[] = array('value' => $pageTypeName, 'label' => $pageTypeInfo['label']);
}
}
$params = array();
$this->addOption($customLayouts, __('Custom Layouts'), $params);
$this->addOption($pageLayouts, __('Page Layouts'), $params);
}