116 lines
3.6 KiB
PHP
116 lines
3.6 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.phpdoctrine.org>.
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*/
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#namespace Doctrine::Common::Event;
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/**
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* The EventManager is the central point of Doctrine's event listener system.
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* Listeners are registered on the manager and events are dispatched through the
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* manager.
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*
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* @author Roman Borschel <roman@code-factory.org>
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* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
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* @since 2.0
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*/
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class Doctrine_EventManager
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{
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/**
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* Map of registered listeners.
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* <event> => <listeners>
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*
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* @var array
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*/
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private $_listeners = array();
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/**
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* Dispatches an event to all registered listeners.
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*
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* @param string|Event $event The name of the event or the event object.
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* @return boolean
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*/
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public function dispatchEvent($event)
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{
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$argIsCallback = is_string($event);
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$callback = $argIsCallback ? $event : $event->getType();
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if (isset($this->_listeners[$callback])) {
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$event = $argIsCallback ? new Doctrine_Event($event) : $event;
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foreach ($this->_listeners[$callback] as $listener) {
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$listener->$callback($event);
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}
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return ! $event->getDefaultPrevented();
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}
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return true;
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}
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/**
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* Gets the listeners of a specific event or all listeners.
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*
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* @param string $event The name of the event.
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* @return
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*/
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public function getListeners($event = null)
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{
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return $event ? $this->_listeners[$event] : $this->_listeners;
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}
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/**
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* Checks whether an event has any registered listeners.
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*
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* @param string $event
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* @return boolean
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*/
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public function hasListeners($event)
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{
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return isset($this->_listeners[$event]);
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}
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/**
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* Adds an event listener that listens on the specified events.
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*
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* @param string|array $events The event(s) to listen on.
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* @param object $listener The listener object.
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*/
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public function addEventListener($events, $listener)
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{
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// TODO: maybe check for duplicate registrations?
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if ( ! is_array($events)) {
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$events = array($events);
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}
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foreach ($events as $event) {
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$this->_listeners[$event] = $listener;
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}
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}
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/**
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* Adds an EventSubscriber. The subscriber is asked for all the events he is
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* interested in and added as a listener for these events.
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*
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* @param Doctrine::Common::Event::EventSubscriber $subscriber The subscriber.
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*/
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public function addEventSubscriber(Doctrine_EventSubscriber $subscriber)
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{
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$this->addEventListener($subscriber->getSubscribedEvents(), $subscriber);
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}
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}
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?>
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