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<?php |
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/* |
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* This file is part of the slince/event-dispatcher package. |
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* |
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* (c) Slince <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Slince\EventDispatcher; |
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class ListenerPriorityQueue implements \IteratorAggregate |
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{ |
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/** |
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* @var \SplObjectStorage |
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*/ |
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protected $storage; |
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/** |
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* @var \SplPriorityQueue |
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*/ |
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protected $queue; |
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public function __construct() |
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{ |
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$this->storage = new \SplObjectStorage(); |
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$this->queue = new \SplPriorityQueue(); |
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} |
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/** |
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* Insert an listener to the queue. |
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* |
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* @param ListenerInterface $listener |
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* @param int $priority |
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*/ |
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public function insert(ListenerInterface $listener, $priority) |
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{ |
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$this->storage->attach($listener, $priority); |
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$this->queue->insert($listener, $priority); |
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} |
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/** |
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* Removes an listener from the queue. |
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* |
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* @param ListenerInterface $listener |
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*/ |
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public function detach(ListenerInterface $listener) |
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{ |
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if ($this->storage->contains($listener)) { |
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$this->storage->detach($listener); |
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$this->refreshQueue(); |
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} |
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} |
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/** |
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* Clears the queue. |
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*/ |
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public function clear() |
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{ |
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$this->storage = new \SplObjectStorage(); |
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$this->queue = new \SplPriorityQueue(); |
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} |
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/** |
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* Clears the queue. |
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* |
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* @deprecated use clear instead |
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*/ |
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public function flush() |
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{ |
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$this->clear(); |
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} |
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/** |
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* Checks whether the queue contains the listener. |
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* |
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* @param ListenerInterface $listener |
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* |
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* @return boolean |
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*/ |
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public function contains(ListenerInterface $listener) |
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{ |
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return $this->storage->contains($listener); |
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} |
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/** |
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* Gets all listeners. |
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* |
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* @return ListenerInterface[] |
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*/ |
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public function all() |
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{ |
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$listeners = []; |
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foreach ($this->getIterator() as $listener) { |
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$listeners[] = $listener; |
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} |
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return $listeners; |
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} |
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/** |
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* Gets all listeners. |
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* |
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* @deprecated use all instead |
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*/ |
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public function getAll() |
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{ |
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return $this->all(); |
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} |
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/** |
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* Clones and returns a iterator. |
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* |
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* @return \SplPriorityQueue |
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*/ |
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public function getIterator() |
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{ |
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$queue = clone $this->queue; |
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if (!$queue->isEmpty()) { |
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$queue->top(); |
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} |
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return $queue; |
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} |
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/** |
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* Refreshes the status of the queue. |
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*/ |
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protected function refreshQueue() |
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{ |
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$this->storage->rewind(); |
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$this->queue = new \SplPriorityQueue(); |
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foreach ($this->storage as $listener) { |
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$priority = $this->storage->getInfo(); |
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$this->queue->insert($listener, $priority); |
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} |
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} |
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} |
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slince /
event-dispatcher
