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<?php
namespace Drupal\Core\Plugin;
use Drupal\Component\Plugin\Definition\PluginDefinitionInterface;
use Drupal\Component\Plugin\DependentPluginInterface;
use Drupal\Component\Plugin\PluginInspectionInterface;
use Drupal\Core\Entity\DependencyTrait;
use Drupal\Core\Plugin\Definition\DependentPluginDefinitionInterface;
/**
* Provides a trait for calculating the dependencies of a plugin.
*/
trait PluginDependencyTrait {
use DependencyTrait;
/**
* Calculates and adds dependencies of a specific plugin instance.
*
* Dependencies are added for the module that provides the plugin, as well
* as any dependencies declared by the instance's calculateDependencies()
* method, if it implements
* \Drupal\Component\Plugin\DependentPluginInterface.
*
* @param \Drupal\Component\Plugin\PluginInspectionInterface $instance
* The plugin instance.
*/
protected function calculatePluginDependencies(PluginInspectionInterface $instance) {
$definition = $instance->getPluginDefinition();
if ($definition instanceof PluginDefinitionInterface) {
$this->addDependency('module', $definition->getProvider());
if ($definition instanceof DependentPluginDefinitionInterface && $config_dependencies = $definition->getConfigDependencies()) {
$this->addDependencies($config_dependencies);
}
}
elseif (is_array($definition)) {
$this->addDependency('module', $definition['provider']);
// Plugins can declare additional dependencies in their definition.
if (isset($definition['config_dependencies'])) {
$this->addDependencies($definition['config_dependencies']);
}
}
// If a plugin is dependent, calculate its dependencies.
if ($instance instanceof DependentPluginInterface && $plugin_dependencies = $instance->calculateDependencies()) {
$this->addDependencies($plugin_dependencies);
}
}
}