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<?php

/**

* Event handling class.

*

* @author Tobiasz Cudnik

* @package phpQuery

* @static

*/

abstract class phpQueryEvents {

/**

* Trigger a type of event on every matched element.

*

* @param DOMNode|phpQueryObject|string $document

* @param unknown_type $type

* @param unknown_type $data

*

* @TODO exclusive events (with !)

* @TODO global events (test)

* @TODO support more than event in $type (space-separated)

*/

public static function trigger($document, $type, $data = array(), $node = null) {

// trigger: function(type, data, elem, donative, extra) {

$documentID = phpQuery::getDocumentID($document);

$namespace = null;

if (strpos($type, '.') !== false)

list($name, $namespace) = explode('.', $type);

else

$name = $type;

if (! $node) {

if (self::issetGlobal($documentID, $type)) {

$pq = phpQuery::getDocument($documentID);

// TODO check add($pq->document)

$pq->find('*')->add($pq->document)

->trigger($type, $data);

}

} else {

if (isset($data[0]) && $data[0] instanceof DOMEvent) {

$event = $data[0];

$event->relatedTarget = $event->target;

$event->target = $node;

$data = array_slice($data, 1);

} else {

$event = new DOMEvent(array(

'type' => $type,

'target' => $node,

'timeStamp' => time(),

));

}

$i = 0;

while($node) {

// TODO whois

phpQuery::debug("Triggering ".($i?"bubbled ":'')."event '{$type}' on "

."node \n");//.phpQueryObject::whois($node)."\n");

$event->currentTarget = $node;

$eventNode = self::getNode($documentID, $node);

if (isset($eventNode->eventHandlers)) {

foreach($eventNode->eventHandlers as $eventType => $handlers) {

$eventNamespace = null;

if (strpos($type, '.') !== false)

list($eventName, $eventNamespace) = explode('.', $eventType);

else

$eventName = $eventType;

if ($name != $eventName)

continue;

if ($namespace && $eventNamespace && $namespace != $eventNamespace)

continue;

foreach($handlers as $handler) {

phpQuery::debug("Calling event handler\n");

$event->data = $handler['data']

? $handler['data']

: null;

$params = array_merge(array($event), $data);

$return = phpQuery::callbackRun($handler['callback'], $params);

if ($return === false) {

$event->bubbles = false;

}

}

}

}

// to bubble or not to bubble...

if (! $event->bubbles)

break;

$node = $node->parentNode;

$i++;

}

}

}

/**

* Binds a handler to one or more events (like click) for each matched element.

* Can also bind custom events.

*

* @param DOMNode|phpQueryObject|string $document

* @param unknown_type $type

* @param unknown_type $data Optional

* @param unknown_type $callback

*

* @TODO support '!' (exclusive) events

* @TODO support more than event in $type (space-separated)

* @TODO support binding to global events

*/

public static function add($document, $node, $type, $data, $callback = null) {

phpQuery::debug("Binding '$type' event");

$documentID = phpQuery::getDocumentID($document);

// if (is_null($callback) && is_callable($data)) {

// $callback = $data;

// $data = null;

// }

$eventNode = self::getNode($documentID, $node);

if (! $eventNode)

$eventNode = self::setNode($documentID, $node);

if (!isset($eventNode->eventHandlers[$type]))

$eventNode->eventHandlers[$type] = array();

$eventNode->eventHandlers[$type][] = array(

'callback' => $callback,

'data' => $data,

);

}

/**

* Enter description here...

*

* @param DOMNode|phpQueryObject|string $document

* @param unknown_type $type

* @param unknown_type $callback

*

* @TODO namespace events

* @TODO support more than event in $type (space-separated)

*/

public static function remove($document, $node, $type = null, $callback = null) {

$documentID = phpQuery::getDocumentID($document);

$eventNode = self::getNode($documentID, $node);

if (is_object($eventNode) && isset($eventNode->eventHandlers[$type])) {

if ($callback) {

foreach($eventNode->eventHandlers[$type] as $k => $handler)

if ($handler['callback'] == $callback)

unset($eventNode->eventHandlers[$type][$k]);

} else {

unset($eventNode->eventHandlers[$type]);

}

}

}

protected static function getNode($documentID, $node) {

foreach(phpQuery::$documents[$documentID]->eventsNodes as $eventNode) {

if ($node->isSameNode($eventNode))

return $eventNode;

}

}

protected static function setNode($documentID, $node) {

phpQuery::$documents[$documentID]->eventsNodes[] = $node;

return phpQuery::$documents[$documentID]->eventsNodes[

count(phpQuery::$documents[$documentID]->eventsNodes)-1

];

}

protected static function issetGlobal($documentID, $type) {

return isset(phpQuery::$documents[$documentID])

? in_array($type, phpQuery::$documents[$documentID]->eventsGlobal)

: false;

}

}