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Edit File : EventDispatcher.php \| Size : 8.79 KB
<?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 Psr\EventDispatcher\StoppableEventInterface; use Symfony\Component\EventDispatcher\Debug\WrappedListener; /* * 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 Guilherme Blanco <guilhermeblanco@hotmail.com> * @author Jonathan Wage <jonwage@gmail.com> * @author Roman Borschel <roman@code-factory.org> * @author Bernhard Schussek <bschussek@gmail.com> * @author Fabien Potencier <fabien@symfony.com> * @author Jordi Boggiano <j.boggiano@seld.be> * @author Jordan Alliot <jordan.alliot@gmail.com> * @author Nicolas Grekas <p@tchwork.com> / class EventDispatcher implements EventDispatcherInterface { private array $listeners = []; private array $sorted = []; private array $optimized; public function __construct() { if (__CLASS__ === static::class) { $this->optimized = []; } } public function dispatch(object $event, string $eventName = null): object { $eventName ??= $event::class; if (isset($this->optimized)) { $listeners = $this->optimized[$eventName] ?? (empty($this->listeners[$eventName]) ? [] : $this->optimizeListeners($eventName)); } else { $listeners = $this->getListeners($eventName); } if ($listeners) { $this->callListeners($listeners, $eventName, $event); } return $event; } public function getListeners(string $eventName = null): array { if (null !== $eventName) { if (empty($this->listeners[$eventName])) { return []; } if (!isset($this->sorted[$eventName])) { $this->sortListeners($eventName); } return $this->sorted[$eventName]; } foreach ($this->listeners as $eventName => $eventListeners) { if (!isset($this->sorted[$eventName])) { $this->sortListeners($eventName); } } return array_filter($this->sorted); } public function getListenerPriority(string $eventName, callable\|array $listener): ?int { if (empty($this->listeners[$eventName])) { return null; } if (\is_array($listener) && isset($listener[0]) && $listener[0] instanceof \Closure && 2 >= \count($listener)) { $listener[0] = $listener[0](); $listener[1] ??= '__invoke'; } foreach ($this->listeners[$eventName] as $priority => &$listeners) { foreach ($listeners as &$v) { if ($v !== $listener && \is_array($v) && isset($v[0]) && $v[0] instanceof \Closure && 2 >= \count($v)) { $v[0] = $v[0](); $v[1] ??= '__invoke'; } if ($v === $listener \|\| ($listener instanceof \Closure && $v == $listener)) { return $priority; } } } return null; } public function hasListeners(string $eventName = null): bool { if (null !== $eventName) { return !empty($this->listeners[$eventName]); } foreach ($this->listeners as $eventListeners) { if ($eventListeners) { return true; } } return false; } /* * @return void / public function addListener(string $eventName, callable\|array $listener, int $priority = 0) { $this->listeners[$eventName][$priority][] = $listener; unset($this->sorted[$eventName], $this->optimized[$eventName]); } /* * @return void / public function removeListener(string $eventName, callable\|array $listener) { if (empty($this->listeners[$eventName])) { return; } if (\is_array($listener) && isset($listener[0]) && $listener[0] instanceof \Closure && 2 >= \count($listener)) { $listener[0] = $listener[0](); $listener[1] ??= '__invoke'; } foreach ($this->listeners[$eventName] as $priority => &$listeners) { foreach ($listeners as $k => &$v) { if ($v !== $listener && \is_array($v) && isset($v[0]) && $v[0] instanceof \Closure && 2 >= \count($v)) { $v[0] = $v[0](); $v[1] ??= '__invoke'; } if ($v === $listener \|\| ($listener instanceof \Closure && $v == $listener)) { unset($listeners[$k], $this->sorted[$eventName], $this->optimized[$eventName]); } } if (!$listeners) { unset($this->listeners[$eventName][$priority]); } } } /* * @return void / public function addSubscriber(EventSubscriberInterface $subscriber) { foreach ($subscriber->getSubscribedEvents() as $eventName => $params) { if (\is_string($params)) { $this->addListener($eventName, [$subscriber, $params]); } elseif (\is_string($params[0])) { $this->addListener($eventName, [$subscriber, $params[0]], $params[1] ?? 0); } else { foreach ($params as $listener) { $this->addListener($eventName, [$subscriber, $listener[0]], $listener[1] ?? 0); } } } } /* * @return void / public function removeSubscriber(EventSubscriberInterface $subscriber) { foreach ($subscriber->getSubscribedEvents() as $eventName => $params) { if (\is_array($params) && \is_array($params[0])) { foreach ($params as $listener) { $this->removeListener($eventName, [$subscriber, $listener[0]]); } } else { $this->removeListener($eventName, [$subscriber, \is_string($params) ? $params : $params[0]]); } } } /* * Triggers the listeners of an event. * * This method can be overridden to add functionality that is executed * for each listener. * * @param callable[] $listeners The event listeners * @param string $eventName The name of the event to dispatch * @param object $event The event object to pass to the event handlers/listeners * * @return void / protected function callListeners(iterable $listeners, string $eventName, object $event) { $stoppable = $event instanceof StoppableEventInterface; foreach ($listeners as $listener) { if ($stoppable && $event->isPropagationStopped()) { break; } $listener($event, $eventName, $this); } } /* * Sorts the internal list of listeners for the given event by priority. / private function sortListeners(string $eventName): void { krsort($this->listeners[$eventName]); $this->sorted[$eventName] = []; foreach ($this->listeners[$eventName] as &$listeners) { foreach ($listeners as &$listener) { if (\is_array($listener) && isset($listener[0]) && $listener[0] instanceof \Closure && 2 >= \count($listener)) { $listener[0] = $listener[0](); $listener[1] ??= '__invoke'; } $this->sorted[$eventName][] = $listener; } } } /* * Optimizes the internal list of listeners for the given event by priority. */ private function optimizeListeners(string $eventName): array { krsort($this->listeners[$eventName]); $this->optimized[$eventName] = []; foreach ($this->listeners[$eventName] as &$listeners) { foreach ($listeners as &$listener) { $closure = &$this->optimized[$eventName][]; if (\is_array($listener) && isset($listener[0]) && $listener[0] instanceof \Closure && 2 >= \count($listener)) { $closure = static function (...$args) use (&$listener, &$closure) { if ($listener[0] instanceof \Closure) { $listener[0] = $listener[0](); $listener[1] ??= '__invoke'; } ($closure = $listener(...))(...$args); }; } else { $closure = $listener instanceof WrappedListener ? $listener : $listener(...); } } } return $this->optimized[$eventName]; } } Back

Edit File : EventDispatcher.php | Size : 8.79 KB

<?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 Psr\EventDispatcher\StoppableEventInterface;
use Symfony\Component\EventDispatcher\Debug\WrappedListener;

/**
 * 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 Guilherme Blanco <guilhermeblanco@hotmail.com>
 * @author Jonathan Wage <jonwage@gmail.com>
 * @author Roman Borschel <roman@code-factory.org>
 * @author Bernhard Schussek <bschussek@gmail.com>
 * @author Fabien Potencier <fabien@symfony.com>
 * @author Jordi Boggiano <j.boggiano@seld.be>
 * @author Jordan Alliot <jordan.alliot@gmail.com>
 * @author Nicolas Grekas <p@tchwork.com>
 */
class EventDispatcher implements EventDispatcherInterface
{
    private array $listeners = [];
    private array $sorted = [];
    private array $optimized;

public function __construct()
    {
        if (__CLASS__ === static::class) {
            $this->optimized = [];
        }
    }

public function dispatch(object $event, string $eventName = null): object
    {
        $eventName ??= $event::class;

if (isset($this->optimized)) {
            $listeners = $this->optimized[$eventName] ?? (empty($this->listeners[$eventName]) ? [] : $this->optimizeListeners($eventName));
        } else {
            $listeners = $this->getListeners($eventName);
        }

if ($listeners) {
            $this->callListeners($listeners, $eventName, $event);
        }

return $event;
    }

public function getListeners(string $eventName = null): array
    {
        if (null !== $eventName) {
            if (empty($this->listeners[$eventName])) {
                return [];
            }

if (!isset($this->sorted[$eventName])) {
                $this->sortListeners($eventName);
            }

return $this->sorted[$eventName];
        }

foreach ($this->listeners as $eventName => $eventListeners) {
            if (!isset($this->sorted[$eventName])) {
                $this->sortListeners($eventName);
            }
        }

return array_filter($this->sorted);
    }

public function getListenerPriority(string $eventName, callable|array $listener): ?int
    {
        if (empty($this->listeners[$eventName])) {
            return null;
        }

if (\is_array($listener) && isset($listener[0]) && $listener[0] instanceof \Closure && 2 >= \count($listener)) {
            $listener[0] = $listener[0]();
            $listener[1] ??= '__invoke';
        }

foreach ($this->listeners[$eventName] as $priority => &$listeners) {
            foreach ($listeners as &$v) {
                if ($v !== $listener && \is_array($v) && isset($v[0]) && $v[0] instanceof \Closure && 2 >= \count($v)) {
                    $v[0] = $v[0]();
                    $v[1] ??= '__invoke';
                }
                if ($v === $listener || ($listener instanceof \Closure && $v == $listener)) {
                    return $priority;
                }
            }
        }

return null;
    }

public function hasListeners(string $eventName = null): bool
    {
        if (null !== $eventName) {
            return !empty($this->listeners[$eventName]);
        }

foreach ($this->listeners as $eventListeners) {
            if ($eventListeners) {
                return true;
            }
        }

return false;
    }

/**
     * @return void
     */
    public function addListener(string $eventName, callable|array $listener, int $priority = 0)
    {
        $this->listeners[$eventName][$priority][] = $listener;
        unset($this->sorted[$eventName], $this->optimized[$eventName]);
    }

/**
     * @return void
     */
    public function removeListener(string $eventName, callable|array $listener)
    {
        if (empty($this->listeners[$eventName])) {
            return;
        }

foreach ($this->listeners[$eventName] as $priority => &$listeners) {
            foreach ($listeners as $k => &$v) {
                if ($v !== $listener && \is_array($v) && isset($v[0]) && $v[0] instanceof \Closure && 2 >= \count($v)) {
                    $v[0] = $v[0]();
                    $v[1] ??= '__invoke';
                }
                if ($v === $listener || ($listener instanceof \Closure && $v == $listener)) {
                    unset($listeners[$k], $this->sorted[$eventName], $this->optimized[$eventName]);
                }
            }

if (!$listeners) {
                unset($this->listeners[$eventName][$priority]);
            }
        }
    }

/**
     * @return void
     */
    public function addSubscriber(EventSubscriberInterface $subscriber)
    {
        foreach ($subscriber->getSubscribedEvents() as $eventName => $params) {
            if (\is_string($params)) {
                $this->addListener($eventName, [$subscriber, $params]);
            } elseif (\is_string($params[0])) {
                $this->addListener($eventName, [$subscriber, $params[0]], $params[1] ?? 0);
            } else {
                foreach ($params as $listener) {
                    $this->addListener($eventName, [$subscriber, $listener[0]], $listener[1] ?? 0);
                }
            }
        }
    }

/**
     * @return void
     */
    public function removeSubscriber(EventSubscriberInterface $subscriber)
    {
        foreach ($subscriber->getSubscribedEvents() as $eventName => $params) {
            if (\is_array($params) && \is_array($params[0])) {
                foreach ($params as $listener) {
                    $this->removeListener($eventName, [$subscriber, $listener[0]]);
                }
            } else {
                $this->removeListener($eventName, [$subscriber, \is_string($params) ? $params : $params[0]]);
            }
        }
    }

/**
     * Triggers the listeners of an event.
     *
     * This method can be overridden to add functionality that is executed
     * for each listener.
     *
     * @param callable[] $listeners The event listeners
     * @param string     $eventName The name of the event to dispatch
     * @param object     $event     The event object to pass to the event handlers/listeners
     *
     * @return void
     */
    protected function callListeners(iterable $listeners, string $eventName, object $event)
    {
        $stoppable = $event instanceof StoppableEventInterface;

foreach ($listeners as $listener) {
            if ($stoppable && $event->isPropagationStopped()) {
                break;
            }
            $listener($event, $eventName, $this);
        }
    }

/**
     * Sorts the internal list of listeners for the given event by priority.
     */
    private function sortListeners(string $eventName): void
    {
        krsort($this->listeners[$eventName]);
        $this->sorted[$eventName] = [];

foreach ($this->listeners[$eventName] as &$listeners) {
            foreach ($listeners as &$listener) {
                if (\is_array($listener) && isset($listener[0]) && $listener[0] instanceof \Closure && 2 >= \count($listener)) {
                    $listener[0] = $listener[0]();
                    $listener[1] ??= '__invoke';
                }
                $this->sorted[$eventName][] = $listener;
            }
        }
    }

/**
     * Optimizes the internal list of listeners for the given event by priority.
     */
    private function optimizeListeners(string $eventName): array
    {
        krsort($this->listeners[$eventName]);
        $this->optimized[$eventName] = [];

foreach ($this->listeners[$eventName] as &$listeners) {
            foreach ($listeners as &$listener) {
                $closure = &$this->optimized[$eventName][];
                if (\is_array($listener) && isset($listener[0]) && $listener[0] instanceof \Closure && 2 >= \count($listener)) {
                    $closure = static function (...$args) use (&$listener, &$closure) {
                        if ($listener[0] instanceof \Closure) {
                            $listener[0] = $listener[0]();
                            $listener[1] ??= '__invoke';
                        }
                        ($closure = $listener(...))(...$args);
                    };
                } else {
                    $closure = $listener instanceof WrappedListener ? $listener : $listener(...);
                }
            }
        }

return $this->optimized[$eventName];
    }
}

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