Ticket #33552: 33552.2.diff

src/wp-includes/class-wp-customize-manager.php

@@ -191 +191 @@
                 require_once( ABSPATH . WPINC . '/class-wp-customize-panel.php' );
                 require_once( ABSPATH . WPINC . '/class-wp-customize-section.php' );
                 require_once( ABSPATH . WPINC . '/class-wp-customize-control.php' );
-                require_once( ABSPATH . WPINC . '/class-wp-customize-widgets.php' );
-                require_once( ABSPATH . WPINC . '/class-wp-customize-nav-menus.php' );
 
-                $this->widgets = new WP_Customize_Widgets( $this );
-                $this->nav_menus = new WP_Customize_Nav_Menus( $this );
+                /**
+                 * Filter the core Customizer components to load.
+                 *
+                 * @since 4.4.0
+                 *
+                 * @see WP_Customize_Manager::__construct()
+                 *
+                 * @param array                $components List of core components to load.
+                 * @param WP_Customize_Manager $this       WP_Customize_Manager instance.
+                 */
+                $components = apply_filters( 'customize_components_to_load', array( 'widgets', 'nav_menus' ), $this );
 
+                switch( $components ) {
+                        case 'widgets' :
+                                require_once( ABSPATH . WPINC . '/class-wp-customize-widgets.php' );
+                                $this->widgets = new WP_Customize_Widgets( $this );
+                                break;
+                        case 'nav_menus' :
+                                require_once( ABSPATH . WPINC . '/class-wp-customize-nav-menus.php' );
+                                $this->nav_menus = new WP_Customize_Nav_Menus( $this );
+                                break;
+                        default : break;
+                }
+
                 add_filter( 'wp_die_handler', array( $this, 'wp_die_handler' ) );
 
                 add_action( 'setup_theme', array( $this, 'setup_theme' ) );