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<?php
namespace Drupal\Core\Layout;
use Drupal\Component\Utility\NestedArray;
use Drupal\Core\Plugin\PluginBase;
/**
* Provides a default class for Layout plugins.
*
* @internal
* The layout system is currently experimental and should only be leveraged by
* experimental modules and development releases of contributed modules.
* See https://www.drupal.org/core/experimental for more information.
*/
class LayoutDefault extends PluginBase implements LayoutInterface {
/**
* The layout definition.
*
* @var \Drupal\Core\Layout\LayoutDefinition
*/
protected $pluginDefinition;
/**
* {@inheritdoc}
*/
public function __construct(array $configuration, $plugin_id, $plugin_definition) {
parent::__construct($configuration, $plugin_id, $plugin_definition);
$this->setConfiguration($configuration);
}
/**
* {@inheritdoc}
*/
public function build(array $regions) {
// Ensure $build only contains defined regions and in the order defined.
$build = [];
foreach ($this->getPluginDefinition()->getRegionNames() as $region_name) {
if (array_key_exists($region_name, $regions)) {
$build[$region_name] = $regions[$region_name];
}
}
$build['#settings'] = $this->getConfiguration();
$build['#layout'] = $this->pluginDefinition;
$build['#theme'] = $this->pluginDefinition->getThemeHook();
if ($library = $this->pluginDefinition->getLibrary()) {
$build['#attached']['library'][] = $library;
}
return $build;
}
/**
* {@inheritdoc}
*/
public function getConfiguration() {
return $this->configuration;
}
/**
* {@inheritdoc}
*/
public function setConfiguration(array $configuration) {
$this->configuration = NestedArray::mergeDeep($this->defaultConfiguration(), $configuration);
}
/**
* {@inheritdoc}
*/
public function defaultConfiguration() {
return [];
}
/**
* {@inheritdoc}
*/
public function calculateDependencies() {
return [];
}
/**
* {@inheritdoc}
*
* @return \Drupal\Core\Layout\LayoutDefinition
*/
public function getPluginDefinition() {
return parent::getPluginDefinition();
}
}