interface ContextProviderInterface in Zircon Profile 8

Defines an interface for providing plugin contexts.

Implementations only need to deal with unqualified context IDs so they only need to be unique in the context of a given service provider.

The fully qualified context ID then includes the service ID: service_id}:{unqualified_context_id}.

Hierarchy

• interface \Drupal\Core\Plugin\Context\ContextProviderInterface

See also

\Drupal\Core\Plugin\Context\ContextRepositoryInterface

4 files declare their use of ContextProviderInterface

CurrentLanguageContext.php in core/lib/Drupal/Core/Language/ContextProvider/CurrentLanguageContext.php

Contains \Drupal\Core\Language\ContextProvider\CurrentLanguageContext.

CurrentUserContext.php in core/modules/user/src/ContextProvider/CurrentUserContext.php

Contains \Drupal\user\ContextProvider\CurrentUserContext.

MultipleStaticContext.php in core/modules/block/tests/modules/block_test/src/ContextProvider/MultipleStaticContext.php

Contains \Drupal\block_test\ContextProvider\MultipleStaticContext.

NodeRouteContext.php in core/modules/node/src/ContextProvider/NodeRouteContext.php

Contains \Drupal\node\ContextProvider\NodeRouteContext.

File

core/lib/Drupal/Core/Plugin/Context/ContextProviderInterface.php, line 21

Contains \Drupal\Core\Plugin\Context\ContextProviderInterface.

Namespace

Drupal\Core\Plugin\Context

interface ContextProviderInterface {

  /**
   * Gets runtime context values for the given context IDs.
   *
   * For context-aware plugins to function correctly, all of the contexts that
   * they require must be populated with values. So this method should set a
   * value for each context that it adds. For example:
   *
   * @code
   *   // Determine a specific node to pass as context to a block.
   *   $node = ...
   *
   *   // Set that specific node as the value of the 'node' context.
   *   $context = new Context(new ContextDefinition('entity:node'), $node);
   *   return ['node' => $context];
   * @endcode
   *
   * On the other hand, there are cases, on which providers no longer are
   * possible to provide context objects, even without the value, so the caller
   * should not expect it.
   *
   * @param string[] $unqualified_context_ids
   *   The requested context IDs. The context provider must only return contexts
   *   for those IDs.
   *
   * @return \Drupal\Core\Plugin\Context\ContextInterface[]
   *   The determined available contexts, keyed by the unqualified context_id.
   *
   * @see \Drupal\Core\Plugin\Context\ContextProviderInterface:getAvailableContexts()
   */
  public function getRuntimeContexts(array $unqualified_context_ids);

  /**
   * Gets all available contexts for the purposes of configuration.
   *
   * When a context aware plugin is being configured, the configuration UI must
   * know which named contexts are potentially available, but does not care
   * about the value, since the value can be different for each request, and
   * might not be available at all during the configuration UI's request.
   *
   * For example:
   * @code
   *   // During configuration, there is no specific node to pass as context.
   *   // However, inform the system that a context named 'node' is
   *   // available, and provide its definition, so that context aware plugins
   *   // can be configured to use it. When the plugin, for example a block,
   *   // needs to evaluate the context, the value of this context will be
   *   // supplied by getRuntimeContexts().
   *   $context = new Context(new ContextDefinition('entity:node'));
   *   return ['node' => $context];
   * @endcode
   *
   * @return \Drupal\Core\Plugin\Context\ContextInterface[]
   *   All available contexts keyed by the unqualified context ID.
   *
   * @see \Drupal\Core\Plugin\Context\ContextProviderInterface::getRuntimeContext()
   */
  public function getAvailableContexts();

}

Members

Name	Modifiers	Type	Description	Overrides
ContextProviderInterface::getAvailableContexts	public	function	Gets all available contexts for the purposes of configuration.	4
ContextProviderInterface::getRuntimeContexts	public	function	Gets runtime context values for the given context IDs.	4