class ElementInfoManager in Zircon Profile 8.0

Same name and namespace in other branches

8 core/lib/Drupal/Core/Render/ElementInfoManager.php \Drupal\Core\Render\ElementInfoManager

Provides a plugin manager for element plugins.

View source

class ElementInfoManager extends DefaultPluginManager implements ElementInfoManagerInterface {

  /**
   * Stores the available element information.
   *
   * @var array
   */
  protected $elementInfo;

  /**
   * The theme manager.
   *
   * @var \Drupal\Core\Theme\ThemeManagerInterface
   */
  protected $themeManager;

  /**
   * The cache tag invalidator.
   *
   * @var \Drupal\Core\Cache\CacheTagsInvalidatorInterface
   */
  protected $cacheTagInvalidator;

  /**
   * Constructs a ElementInfoManager object.
   *
   * @param \Traversable $namespaces
   *   An object that implements \Traversable which contains the root paths
   *   keyed by the corresponding namespace to look for plugin implementations.
   * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
   *   Cache backend instance to use.
   * @param \Drupal\Core\Cache\CacheTagsInvalidatorInterface $cache_tag_invalidator
   *   The cache tag invalidator.
   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
   *   The module handler to invoke the alter hook with.
   * @param \Drupal\Core\Theme\ThemeManagerInterface $theme_manager
   *   The theme manager.
   */
  public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, CacheTagsInvalidatorInterface $cache_tag_invalidator, ModuleHandlerInterface $module_handler, ThemeManagerInterface $theme_manager) {
    $this
      ->setCacheBackend($cache_backend, 'element_info');
    $this->themeManager = $theme_manager;
    $this->cacheTagInvalidator = $cache_tag_invalidator;
    parent::__construct('Element', $namespaces, $module_handler, 'Drupal\\Core\\Render\\Element\\ElementInterface', 'Drupal\\Core\\Render\\Annotation\\RenderElement');
  }

  /**
   * {@inheritdoc}
   */
  public function getInfo($type) {
    $theme_name = $this->themeManager
      ->getActiveTheme()
      ->getName();
    if (!isset($this->elementInfo[$theme_name])) {
      $this->elementInfo[$theme_name] = $this
        ->buildInfo($theme_name);
    }
    $info = isset($this->elementInfo[$theme_name][$type]) ? $this->elementInfo[$theme_name][$type] : array();
    $info['#defaults_loaded'] = TRUE;
    return $info;
  }

  /**
   * {@inheritdoc}
   */
  public function getInfoProperty($type, $property_name, $default = NULL) {
    $info = $this
      ->getInfo($type);
    return isset($info[$property_name]) ? $info[$property_name] : $default;
  }

  /**
   * Builds up all element information.
   *
   * @param string $theme_name
   *   The theme name.
   *
   * @return array
   */
  protected function buildInfo($theme_name) {

    // Get cached definitions.
    $cid = $this
      ->getCid($theme_name);
    if ($cache = $this->cacheBackend
      ->get($cid)) {
      return $cache->data;
    }

    // Otherwise, rebuild and cache.
    $info = [];
    foreach ($this
      ->getDefinitions() as $element_type => $definition) {
      $element = $this
        ->createInstance($element_type);
      $element_info = $element
        ->getInfo();

      // If this is element is to be used exclusively in a form, denote that it
      // will receive input, and assign the value callback.
      if ($element instanceof FormElementInterface) {
        $element_info['#input'] = TRUE;
        $element_info['#value_callback'] = array(
          $definition['class'],
          'valueCallback',
        );
      }
      $info[$element_type] = $element_info;
    }
    foreach ($info as $element_type => $element) {
      $info[$element_type]['#type'] = $element_type;
    }

    // Allow modules to alter the element type defaults.
    $this->moduleHandler
      ->alter('element_info', $info);
    $this->themeManager
      ->alter('element_info', $info);
    $this->cacheBackend
      ->set($cid, $info, Cache::PERMANENT, [
      'element_info_build',
    ]);
    return $info;
  }

  /**
   * {@inheritdoc}
   *
   * @return \Drupal\Core\Render\Element\ElementInterface
   */
  public function createInstance($plugin_id, array $configuration = array()) {
    return parent::createInstance($plugin_id, $configuration);
  }

  /**
   * {@inheritdoc}
   */
  public function clearCachedDefinitions() {
    $this->elementInfo = NULL;
    $this->cacheTagInvalidator
      ->invalidateTags([
      'element_info_build',
    ]);
    parent::clearCachedDefinitions();
  }

  /**
   * Returns the CID used to cache the element info.
   *
   * @param string $theme_name
   *   The theme name.
   *
   * @return string
   */
  protected function getCid($theme_name) {
    return 'element_info_build:' . $theme_name;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DefaultPluginManager::$alterHook	protected	property	Name of the alter hook if one should be invoked.
DefaultPluginManager::$cacheKey	protected	property	The cache key.
DefaultPluginManager::$cacheTags	protected	property	An array of cache tags to use for the cached definitions.
DefaultPluginManager::$defaults	protected	property	A set of defaults to be referenced by $this->processDefinition() if additional processing of plugins is necessary or helpful for development purposes.	5
DefaultPluginManager::$moduleHandler	protected	property	The module handler to invoke the alter hook.
DefaultPluginManager::$namespaces	protected	property	An object that implements \Traversable which contains the root paths keyed by the corresponding namespace to look for plugin implementations.
DefaultPluginManager::$pluginDefinitionAnnotationName	protected	property	The name of the annotation that contains the plugin definition.
DefaultPluginManager::$pluginInterface	protected	property	The interface each plugin should implement.
DefaultPluginManager::$subdir	protected	property	The subdirectory within a namespace to look for plugins, or FALSE if the plugins are in the top level of the namespace.
DefaultPluginManager::alterDefinitions	protected	function	Invokes the hook to alter the definitions if the alter hook is set.	1
DefaultPluginManager::alterInfo	protected	function	Initializes the alter hook.
DefaultPluginManager::findDefinitions	protected	function	Finds plugin definitions.	2
DefaultPluginManager::getCachedDefinitions	protected	function	Returns the cached plugin definitions of the decorated discovery class.
DefaultPluginManager::getDefinitions	public	function	Gets the definition of all plugins for this type. Overrides DiscoveryTrait::getDefinitions	2
DefaultPluginManager::getDiscovery	protected	function	Gets the plugin discovery. Overrides PluginManagerBase::getDiscovery	7
DefaultPluginManager::getFactory	protected	function	Gets the plugin factory. Overrides PluginManagerBase::getFactory
DefaultPluginManager::processDefinition	public	function	Performs extra processing on plugin definitions.	10
DefaultPluginManager::providerExists	protected	function	Determines if the provider of a definition exists.	1
DefaultPluginManager::setCacheBackend	public	function	Initialize the cache backend.
DefaultPluginManager::setCachedDefinitions	protected	function	Sets a cache of plugin definitions for the decorated discovery class.
DefaultPluginManager::useCaches	public	function	Disable the use of caches. Overrides CachedDiscoveryInterface::useCaches	1
DiscoveryCachedTrait::$definitions	protected	property	Cached definitions array.	1
DiscoveryCachedTrait::getDefinition	public	function	Overrides DiscoveryTrait::getDefinition	3
DiscoveryTrait::doGetDefinition	protected	function	Gets a specific plugin definition.
DiscoveryTrait::hasDefinition	public	function
ElementInfoManager::$cacheTagInvalidator	protected	property	The cache tag invalidator.
ElementInfoManager::$elementInfo	protected	property	Stores the available element information.	1
ElementInfoManager::$themeManager	protected	property	The theme manager.
ElementInfoManager::buildInfo	protected	function	Builds up all element information.
ElementInfoManager::clearCachedDefinitions	public	function	Clears static and persistent plugin definition caches. Overrides DefaultPluginManager::clearCachedDefinitions
ElementInfoManager::createInstance	public	function	Overrides PluginManagerBase::createInstance
ElementInfoManager::getCid	protected	function	Returns the CID used to cache the element info.
ElementInfoManager::getInfo	public	function	Retrieves the default properties for the defined element type. Overrides ElementInfoManagerInterface::getInfo
ElementInfoManager::getInfoProperty	public	function	Retrieves a single property for the defined element type. Overrides ElementInfoManagerInterface::getInfoProperty
ElementInfoManager::__construct	public	function	Constructs a ElementInfoManager object. Overrides DefaultPluginManager::__construct
PluginManagerBase::$discovery	protected	property	The object that discovers plugins managed by this manager.
PluginManagerBase::$factory	protected	property	The object that instantiates plugins managed by this manager.
PluginManagerBase::$mapper	protected	property	The object that returns the preconfigured plugin instance appropriate for a particular runtime condition.
PluginManagerBase::getInstance	public	function	Gets a preconfigured instance of a plugin. Overrides MapperInterface::getInstance	7
UseCacheBackendTrait::$cacheBackend	protected	property	Cache backend instance.
UseCacheBackendTrait::$useCaches	protected	property	Flag whether caches should be used or skipped.
UseCacheBackendTrait::cacheGet	protected	function	Fetches from the cache backend, respecting the use caches flag.
UseCacheBackendTrait::cacheSet	protected	function	Stores data in the persistent cache, respecting the use caches flag.

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class ElementInfoManager in Zircon Profile 8.0

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