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Events can be used like filters #1212

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Events can be used like filters #1212

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9 changes: 7 additions & 2 deletions framework/yii/base/Component.php
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Original file line number Diff line number Diff line change
Expand Up @@ -435,6 +435,7 @@ public function off($name, $handler = null)
* all attached handlers for the event.
* @param string $name the event name
* @param Event $event the event parameter. If not set, a default [[Event]] object will be created.
* @return mix Result that attached handlers
*/
public function trigger($name, $event = null)
{
Expand All @@ -450,14 +451,18 @@ public function trigger($name, $event = null)
$event->name = $name;
foreach ($this->_events[$name] as $handler) {
$event->data = $handler[1];
call_user_func($handler[0], $event);
$returnedEvent = call_user_func($handler[0], $event);
if ($returnedEvent instanceof Event) {
$event = $returnedEvent;
}
// stop further handling if the event is handled
if ($event instanceof Event && $event->handled) {
return;
return $event;
}
}
}
Event::trigger($this, $name, $event);
return $event;
}

/**
Expand Down