Correl Roush
a3dfc6d2b8
git-svn-id: file:///srv/svn/scanner/trunk@18 a0501263-5b7a-4423-a8ba-1edf086583e7
53 lines
1.4 KiB
PHP
53 lines
1.4 KiB
PHP
<?php
|
|
class Signaler {
|
|
private $_listeners = array();
|
|
protected static $current = false;
|
|
|
|
static public function connect(Signaler &$emitter, $signal, &$responder, $slot) {
|
|
if( !is_object($responder) ) {
|
|
return false;
|
|
}
|
|
elseif( !method_exists($responder, $slot) ) {
|
|
return false;
|
|
}
|
|
if( !array_key_exists($signal, $emitter->_listeners) ) {
|
|
$emitter->_listeners[$signal] = array();
|
|
}
|
|
$emitter->_listeners[$signal][] = array(
|
|
'object' => &$responder,
|
|
'method' => $slot
|
|
);
|
|
}
|
|
protected function emit() {
|
|
self::$current = &$this;
|
|
$args = func_get_args();
|
|
if( count($args) == 0 ) {
|
|
// Called without any arguments, raise an error
|
|
return false;
|
|
}
|
|
$signal = array_shift($args);
|
|
$sent = 0;
|
|
if( array_key_exists($signal, $this->_listeners) ) {
|
|
foreach( $this->_listeners[$signal] as $key => $listener ) {
|
|
if(
|
|
!is_object($listener['object'])
|
|
|| !method_exists($listener['object'], $listener['method'])
|
|
) {
|
|
// Something happened to the object since it was connected,
|
|
// and it is no longer usable. Drop it.
|
|
unset($this->_listeners[$key]);
|
|
} else {
|
|
// Everything's good, set the callback loose.
|
|
$result = call_user_func_array(array($listener['object'], $listener['method']), $args);
|
|
if( $result !== false ) {
|
|
$sent++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Special signal for debugging purposes
|
|
if( $signal !== '__emit' ) { $this->emit('__emit', $signal, $args); }
|
|
return $sent;
|
|
}
|
|
}
|
|
?>
|