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<?php
interface ICallbackNamed {
function hasName();
function getName();
}
/**
* Callback class introduces currying-like pattern.
*
* Example:
* function foo($param1, $param2, $param3) {
* var_dump($param1, $param2, $param3);
* }
* $fooCurried = new Callback('foo',
* 'param1 is now statically set',
* new CallbackParam, new CallbackParam
* );
* phpQuery::callbackRun($fooCurried,
* array('param2 value', 'param3 value'
* );
*
* Callback class is supported in all phpQuery methods which accepts callbacks.
*
* @link http://code.google.com/p/phpquery/wiki/Callbacks#Param_Structures
* @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
*
* @TODO??? return fake forwarding function created via create_function
* @TODO honor paramStructure
*/
class Callback
implements ICallbackNamed {
public $callback = null;
public $params = null;
protected $name;
public function __construct($callback, $param1 = null, $param2 = null,
$param3 = null) {
$params = func_get_args();
$params = array_slice($params, 1);
if ($callback instanceof Callback) {
// TODO implement recurention
} else {
$this->callback = $callback;
$this->params = $params;
}
}
public function getName() {
return 'Callback: '.$this->name;
}
public function hasName() {
return isset($this->name) && $this->name;
}
public function setName($name) {
$this->name = $name;
return $this;
}
// TODO test me
// public function addParams() {
// $params = func_get_args();
// return new Callback($this->callback, $this->params+$params);
// }
}
/**
* Shorthand for new Callback(create_function(...), ...);
*
* @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
*/
class CallbackBody extends Callback {
public function __construct($paramList, $code, $param1 = null, $param2 = null,
$param3 = null) {
$params = func_get_args();
$params = array_slice($params, 2);
$this->callback = create_function($paramList, $code);
$this->params = $params;
}
}
/**
* Callback type which on execution returns reference passed during creation.
*
* @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
*/
class CallbackReturnReference extends Callback
implements ICallbackNamed {
protected $reference;
public function __construct(&$reference, $name = null){
$this->reference =& $reference;
$this->callback = array($this, 'callback');
}
public function callback() {
return $this->reference;
}
public function getName() {
return 'Callback: '.$this->name;
}
public function hasName() {
return isset($this->name) && $this->name;
}
}
/**
* Callback type which on execution returns value passed during creation.
*
* @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
*/
class CallbackReturnValue extends Callback
implements ICallbackNamed {
protected $value;
protected $name;
public function __construct($value, $name = null){
$this->value =& $value;
$this->name = $name;
$this->callback = array($this, 'callback');
}
public function callback() {
return $this->value;
}
public function __toString() {
return $this->getName();
}
public function getName() {
return 'Callback: '.$this->name;
}
public function hasName() {
return isset($this->name) && $this->name;
}
}
/**
* CallbackParameterToReference can be used when we don't really want a callback,
* only parameter passed to it. CallbackParameterToReference takes first
* parameter's value and passes it to reference.
*
* @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
*/
class CallbackParameterToReference extends Callback {
/**
* @param $reference
* @TODO implement $paramIndex;
* param index choose which callback param will be passed to reference
*/
public function __construct(&$reference){
$this->callback =& $reference;
}
}
//class CallbackReference extends Callback {
// /**
// *
// * @param $reference
// * @param $paramIndex
// * @todo implement $paramIndex; param index choose which callback param will be passed to reference
// */
// public function __construct(&$reference, $name = null){
// $this->callback =& $reference;
// }
//}
class CallbackParam {}