diff core/modules/layout_builder/src/SectionComponent.php @ 14:1fec387a4317

Update Drupal core to 8.5.2 via Composer

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/layout_builder/src/SectionComponent.php	Mon Apr 23 09:46:53 2018 +0100
@@ -0,0 +1,311 @@
+<?php
+
+namespace Drupal\layout_builder;
+
+use Drupal\Component\Plugin\Exception\PluginException;
+use Drupal\Core\Plugin\ContextAwarePluginInterface;
+use Drupal\layout_builder\Event\SectionComponentBuildRenderArrayEvent;
+
+/**
+ * Provides a value object for a section component.
+ *
+ * A component represents the smallest part of a layout (for example, a block).
+ * Components wrap a renderable plugin, currently using
+ * \Drupal\Core\Block\BlockPluginInterface, and contain the layout region
+ * within the section layout where the component will be rendered.
+ *
+ * @internal
+ *   Layout Builder 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.
+ *
+ * @see \Drupal\Core\Layout\LayoutDefinition
+ * @see \Drupal\layout_builder\Section
+ * @see \Drupal\layout_builder\SectionStorageInterface
+ *
+ * @todo Determine whether to retain the name 'component' in
+ *   https://www.drupal.org/project/drupal/issues/2929783.
+ * @todo Determine whether an interface will be provided for this in
+ *   https://www.drupal.org/project/drupal/issues/2930334.
+ */
+class SectionComponent {
+
+  /**
+   * The UUID of the component.
+   *
+   * @var string
+   */
+  protected $uuid;
+
+  /**
+   * The region the component is placed in.
+   *
+   * @var string
+   */
+  protected $region;
+
+  /**
+   * An array of plugin configuration.
+   *
+   * @var mixed[]
+   */
+  protected $configuration;
+
+  /**
+   * The weight of the component.
+   *
+   * @var int
+   */
+  protected $weight = 0;
+
+  /**
+   * Any additional properties and values.
+   *
+   * @var mixed[]
+   */
+  protected $additional = [];
+
+  /**
+   * Constructs a new SectionComponent.
+   *
+   * @param string $uuid
+   *   The UUID.
+   * @param string $region
+   *   The region.
+   * @param mixed[] $configuration
+   *   The plugin configuration.
+   * @param mixed[] $additional
+   *   An additional values.
+   */
+  public function __construct($uuid, $region, array $configuration = [], array $additional = []) {
+    $this->uuid = $uuid;
+    $this->region = $region;
+    $this->configuration = $configuration;
+    $this->additional = $additional;
+  }
+
+  /**
+   * Returns the renderable array for this component.
+   *
+   * @param \Drupal\Core\Plugin\Context\ContextInterface[] $contexts
+   *   An array of available contexts.
+   * @param bool $in_preview
+   *   TRUE if the component is being previewed, FALSE otherwise.
+   *
+   * @return array
+   *   A renderable array representing the content of the component.
+   */
+  public function toRenderArray(array $contexts = [], $in_preview = FALSE) {
+    $event = new SectionComponentBuildRenderArrayEvent($this, $contexts, $in_preview);
+    $this->eventDispatcher()->dispatch(LayoutBuilderEvents::SECTION_COMPONENT_BUILD_RENDER_ARRAY, $event);
+    $output = $event->getBuild();
+    $event->getCacheableMetadata()->applyTo($output);
+    return $output;
+  }
+
+  /**
+   * Gets any arbitrary property for the component.
+   *
+   * @param string $property
+   *   The property to retrieve.
+   *
+   * @return mixed
+   *   The value for that property, or NULL if the property does not exist.
+   */
+  public function get($property) {
+    if (property_exists($this, $property)) {
+      $value = isset($this->{$property}) ? $this->{$property} : NULL;
+    }
+    else {
+      $value = isset($this->additional[$property]) ? $this->additional[$property] : NULL;
+    }
+    return $value;
+  }
+
+  /**
+   * Sets a value to an arbitrary property for the component.
+   *
+   * @param string $property
+   *   The property to use for the value.
+   * @param mixed $value
+   *   The value to set.
+   *
+   * @return $this
+   */
+  public function set($property, $value) {
+    if (property_exists($this, $property)) {
+      $this->{$property} = $value;
+    }
+    else {
+      $this->additional[$property] = $value;
+    }
+    return $this;
+  }
+
+  /**
+   * Gets the region for the component.
+   *
+   * @return string
+   *   The region.
+   */
+  public function getRegion() {
+    return $this->region;
+  }
+
+  /**
+   * Sets the region for the component.
+   *
+   * @param string $region
+   *   The region.
+   *
+   * @return $this
+   */
+  public function setRegion($region) {
+    $this->region = $region;
+    return $this;
+  }
+
+  /**
+   * Gets the weight of the component.
+   *
+   * @return int
+   *   The zero-based weight of the component.
+   *
+   * @throws \UnexpectedValueException
+   *   Thrown if the weight was never set.
+   */
+  public function getWeight() {
+    return $this->weight;
+  }
+
+  /**
+   * Sets the weight of the component.
+   *
+   * @param int $weight
+   *   The zero-based weight of the component.
+   *
+   * @return $this
+   */
+  public function setWeight($weight) {
+    $this->weight = $weight;
+    return $this;
+  }
+
+  /**
+   * Gets the component plugin configuration.
+   *
+   * @return mixed[]
+   *   The component plugin configuration.
+   */
+  protected function getConfiguration() {
+    return $this->configuration;
+  }
+
+  /**
+   * Sets the plugin configuration.
+   *
+   * @param mixed[] $configuration
+   *   The plugin configuration.
+   *
+   * @return $this
+   */
+  public function setConfiguration(array $configuration) {
+    $this->configuration = $configuration;
+    return $this;
+  }
+
+  /**
+   * Gets the plugin ID.
+   *
+   * @return string
+   *   The plugin ID.
+   *
+   * @throws \Drupal\Component\Plugin\Exception\PluginException
+   *   Thrown if the plugin ID cannot be found.
+   */
+  public function getPluginId() {
+    if (empty($this->configuration['id'])) {
+      throw new PluginException(sprintf('No plugin ID specified for component with "%s" UUID', $this->uuid));
+    }
+    return $this->configuration['id'];
+  }
+
+  /**
+   * Gets the UUID for this component.
+   *
+   * @return string
+   *   The UUID.
+   */
+  public function getUuid() {
+    return $this->uuid;
+  }
+
+  /**
+   * Gets the plugin for this component.
+   *
+   * @param \Drupal\Core\Plugin\Context\ContextInterface[] $contexts
+   *   An array of contexts to set on the plugin.
+   *
+   * @return \Drupal\Component\Plugin\PluginInspectionInterface
+   *   The plugin.
+   */
+  public function getPlugin(array $contexts = []) {
+    $plugin = $this->pluginManager()->createInstance($this->getPluginId(), $this->getConfiguration());
+    if ($contexts && $plugin instanceof ContextAwarePluginInterface) {
+      $this->contextHandler()->applyContextMapping($plugin, $contexts);
+    }
+    return $plugin;
+  }
+
+  /**
+   * Wraps the component plugin manager.
+   *
+   * @return \Drupal\Core\Block\BlockManagerInterface
+   *   The plugin manager.
+   */
+  protected function pluginManager() {
+    // @todo Figure out the best way to unify fields and blocks and components
+    //   in https://www.drupal.org/node/1875974.
+    return \Drupal::service('plugin.manager.block');
+  }
+
+  /**
+   * Wraps the context handler.
+   *
+   * @return \Drupal\Core\Plugin\Context\ContextHandlerInterface
+   *   The context handler.
+   */
+  protected function contextHandler() {
+    return \Drupal::service('context.handler');
+  }
+
+  /**
+   * Wraps the event dispatcher.
+   *
+   * @return \Symfony\Component\EventDispatcher\EventDispatcherInterface
+   *   The event dispatcher.
+   */
+  protected function eventDispatcher() {
+    return \Drupal::service('event_dispatcher');
+  }
+
+  /**
+   * Returns an array representation of the section component.
+   *
+   * @internal
+   *   This is intended for use by a storage mechanism for section components.
+   *
+   * @return array
+   *   An array representation of the section component.
+   */
+  public function toArray() {
+    return [
+      'uuid' => $this->getUuid(),
+      'region' => $this->getRegion(),
+      'configuration' => $this->getConfiguration(),
+      'additional' => $this->additional,
+      'weight' => $this->getWeight(),
+    ];
+  }
+
+}