class DisplayPluginCollection in Drupal 8

A class which wraps the displays of a view so you can lazy-initialize them.

Hierarchy

• class \Drupal\Component\Plugin\LazyPluginCollection implements \Drupal\Component\Plugin\IteratorAggregate, \Drupal\Component\Plugin\Countable
  • class \Drupal\Core\Plugin\DefaultLazyPluginCollection uses DependencySerializationTrait
    • class \Drupal\views\DisplayPluginCollection

1 file declares its use of DisplayPluginCollection

ViewExecutableTest.php in core/modules/views/tests/src/Kernel/ViewExecutableTest.php

File

core/modules/views/src/DisplayPluginCollection.php, line 12

Namespace

Drupal\views

class DisplayPluginCollection extends DefaultLazyPluginCollection {

  /**
   * Stores a reference to the view which has this displays attached.
   *
   * @var \Drupal\views\ViewExecutable
   */
  protected $view;

  /**
   * {@inheritdoc}
   */
  protected $pluginKey = 'display_plugin';

  /**
   * Constructs a DisplayPluginCollection object.
   *
   * @param \Drupal\views\ViewExecutable $view
   *   The view which has this displays attached.
   * @param \Drupal\Component\Plugin\PluginManagerInterface $manager
   *   The manager to be used for instantiating plugins.
   */
  public function __construct(ViewExecutable $view, PluginManagerInterface $manager) {
    parent::__construct($manager, $view->storage
      ->get('display'));
    $this->view = $view;
    $this
      ->initializePlugin('default');
  }

  /**
   * Destructs a DisplayPluginCollection object.
   */
  public function __destruct() {
    $this
      ->clear();
  }

  /**
   * {@inheritdoc}
   *
   * @return \Drupal\views\Plugin\views\display\DisplayPluginBase
   */
  public function &get($instance_id) {
    return parent::get($instance_id);
  }

  /**
   * {@inheritdoc}
   */
  public function clear() {
    foreach (array_filter($this->pluginInstances) as $display) {
      $display
        ->destroy();
    }
    parent::clear();
  }

  /**
   * {@inheritdoc}
   */
  protected function initializePlugin($display_id) {

    // Retrieve and initialize the new display handler with data.
    $display =& $this->view->storage
      ->getDisplay($display_id);
    try {
      $this->configurations[$display_id] = $display;
      parent::initializePlugin($display_id);
    } catch (PluginException $e) {
      $message = $e
        ->getMessage();
      \Drupal::messenger()
        ->addWarning(t('@message', [
        '@message' => $message,
      ]));
    }

    // If no plugin instance has been created, return NULL.
    if (empty($this->pluginInstances[$display_id])) {
      return NULL;
    }
    $this->pluginInstances[$display_id]
      ->initDisplay($this->view, $display);

    // If this is not the default display handler, let it know which is since
    // it may well use some data from the default.
    if ($display_id != 'default') {
      $this->pluginInstances[$display_id]->default_display = $this->pluginInstances['default'];
    }
  }

  /**
   * {@inheritdoc}
   */
  public function remove($instance_id) {
    $this
      ->get($instance_id)
      ->remove();
    parent::remove($instance_id);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DefaultLazyPluginCollection::$configurations	protected	property	The initial configuration for each plugin in the collection.
DefaultLazyPluginCollection::$manager	protected	property	The manager used to instantiate the plugins.
DefaultLazyPluginCollection::$originalOrder	protected	property	The original order of the instances.
DefaultLazyPluginCollection::addInstanceId	public	function	Adds an instance ID to the available instance IDs. Overrides LazyPluginCollection::addInstanceId
DefaultLazyPluginCollection::getConfiguration	public	function	Gets the current configuration of all plugins in this collection. Overrides LazyPluginCollection::getConfiguration	2
DefaultLazyPluginCollection::removeInstanceId	public	function	Removes an instance ID. Overrides LazyPluginCollection::removeInstanceId
DefaultLazyPluginCollection::setConfiguration	public	function	Sets the configuration for all plugins in this collection. Overrides LazyPluginCollection::setConfiguration
DefaultLazyPluginCollection::setInstanceConfiguration	public	function	Updates the configuration for a plugin instance.
DefaultLazyPluginCollection::sort	public	function	Sorts all plugin instances in this collection.	1
DefaultLazyPluginCollection::sortHelper	public	function	Provides uasort() callback to sort plugins.	2
DependencySerializationTrait::$_entityStorages	protected	property	An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function		1
DependencySerializationTrait::__wakeup	public	function		2
DisplayPluginCollection::$pluginKey	protected	property	The key within the plugin configuration that contains the plugin ID. Overrides DefaultLazyPluginCollection::$pluginKey
DisplayPluginCollection::$view	protected	property	Stores a reference to the view which has this displays attached.
DisplayPluginCollection::clear	public	function	Clears all instantiated plugins. Overrides LazyPluginCollection::clear
DisplayPluginCollection::get	public	function	Overrides LazyPluginCollection::get
DisplayPluginCollection::initializePlugin	protected	function	Initializes and stores a plugin. Overrides DefaultLazyPluginCollection::initializePlugin
DisplayPluginCollection::remove	public	function	Removes an initialized plugin. Overrides LazyPluginCollection::remove
DisplayPluginCollection::__construct	public	function	Constructs a DisplayPluginCollection object. Overrides DefaultLazyPluginCollection::__construct
DisplayPluginCollection::__destruct	public	function	Destructs a DisplayPluginCollection object.
LazyPluginCollection::$instanceIds	protected	property	Stores the IDs of all potential plugin instances.
LazyPluginCollection::$pluginInstances	protected	property	Stores all instantiated plugins.
LazyPluginCollection::count	public	function
LazyPluginCollection::getInstanceIds	public	function	Gets all instance IDs.
LazyPluginCollection::getIterator	public	function
LazyPluginCollection::has	public	function	Determines if a plugin instance exists.
LazyPluginCollection::set	public	function	Stores an initialized plugin.