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- <?php
- /*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
- namespace Symfony\Component\EventDispatcher;
- use Symfony\Contracts\EventDispatcher\EventDispatcherInterface as ContractsEventDispatcherInterface;
- /**
- * The EventDispatcherInterface is the central point of Symfony's event listener system.
- * Listeners are registered on the manager and events are dispatched through the
- * manager.
- *
- * @author Bernhard Schussek <bschussek@gmail.com>
- */
- interface EventDispatcherInterface extends ContractsEventDispatcherInterface
- {
- /**
- * Adds an event listener that listens on the specified events.
- *
- * @param callable $listener The listener
- * @param int $priority The higher this value, the earlier an event
- * listener will be triggered in the chain (defaults to 0)
- */
- public function addListener(string $eventName, $listener, int $priority = 0);
- /**
- * Adds an event subscriber.
- *
- * The subscriber is asked for all the events it is
- * interested in and added as a listener for these events.
- */
- public function addSubscriber(EventSubscriberInterface $subscriber);
- /**
- * Removes an event listener from the specified events.
- *
- * @param callable $listener The listener to remove
- */
- public function removeListener(string $eventName, $listener);
- public function removeSubscriber(EventSubscriberInterface $subscriber);
- /**
- * Gets the listeners of a specific event or all listeners sorted by descending priority.
- *
- * @return array The event listeners for the specified event, or all event listeners by event name
- */
- public function getListeners(string $eventName = null);
- /**
- * Gets the listener priority for a specific event.
- *
- * Returns null if the event or the listener does not exist.
- *
- * @param callable $listener The listener
- *
- * @return int|null The event listener priority
- */
- public function getListenerPriority(string $eventName, $listener);
- /**
- * Checks whether an event has any registered listeners.
- *
- * @return bool true if the specified event has any listeners, false otherwise
- */
- public function hasListeners(string $eventName = null);
- }
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