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<?php
/**
* Widget API: WP_Widget_Factory class
*
* @package WordPress
* @subpackage Widgets
* @since 4.4.0
*/
/**
* Singleton that registers and instantiates WP_Widget classes.
*
* @since 2.8.0
* @since 4.4.0 Moved to its own file from wp-includes/widgets.php
*/
class WP_Widget_Factory {
/**
* Widgets array.
*
* @since 2.8.0
* @access public
* @var array
*/
public $widgets = array();
/**
* PHP5 constructor.
*
* @since 4.3.0
* @access public
*/
public function __construct() {
add_action( 'widgets_init', array( $this, '_register_widgets' ), 100 );
}
/**
* PHP4 constructor.
*
* @since 2.8.0
* @access public
*/
public function WP_Widget_Factory() {
_deprecated_constructor( 'WP_Widget_Factory', '4.2.0' );
self::__construct();
}
/**
* Registers a widget subclass.
*
* @since 2.8.0
* @access public
*
* @param string $widget_class The name of a WP_Widget subclass.
*/
public function register( $widget_class ) {
$this->widgets[$widget_class] = new $widget_class();
}
/**
* Un-registers a widget subclass.
*
* @since 2.8.0
* @access public
*
* @param string $widget_class The name of a WP_Widget subclass.
*/
public function unregister( $widget_class ) {
unset( $this->widgets[ $widget_class ] );
}
/**
* Serves as a utility method for adding widgets to the registered widgets global.
*
* @since 2.8.0
* @access public
*
* @global array $wp_registered_widgets
*/
public function _register_widgets() {
global $wp_registered_widgets;
$keys = array_keys($this->widgets);
$registered = array_keys($wp_registered_widgets);
$registered = array_map('_get_widget_id_base', $registered);
foreach ( $keys as $key ) {
// don't register new widget if old widget with the same id is already registered
if ( in_array($this->widgets[$key]->id_base, $registered, true) ) {
unset($this->widgets[$key]);
continue;
}
$this->widgets[$key]->_register();
}
}
}