WP_Customize_Widgets::customize_register()

Source

public function customize_register() {
	global $wp_registered_widgets, $wp_registered_widget_controls, $wp_registered_sidebars;

	$use_widgets_block_editor = wp_use_widgets_block_editor();

	add_filter( 'sidebars_widgets', array( $this, 'preview_sidebars_widgets' ), 1 );

	$sidebars_widgets = array_merge(
		array( 'wp_inactive_widgets' => array() ),
		array_fill_keys( array_keys( $wp_registered_sidebars ), array() ),
		wp_get_sidebars_widgets()
	);

	$new_setting_ids = array();

	/*
	 * Register a setting for all widgets, including those which are active,
	 * inactive, and orphaned since a widget may get suppressed from a sidebar
	 * via a plugin (like Widget Visibility).
	 */
	foreach ( array_keys( $wp_registered_widgets ) as $widget_id ) {
		$setting_id   = $this->get_setting_id( $widget_id );
		$setting_args = $this->get_setting_args( $setting_id );
		if ( ! $this->manager->get_setting( $setting_id ) ) {
			$this->manager->add_setting( $setting_id, $setting_args );
		}
		$new_setting_ids[] = $setting_id;
	}

	/*
	 * Add a setting which will be supplied for the theme's sidebars_widgets
	 * theme_mod when the theme is switched.
	 */
	if ( ! $this->manager->is_theme_active() ) {
		$setting_id   = 'old_sidebars_widgets_data';
		$setting_args = $this->get_setting_args(
			$setting_id,
			array(
				'type'  => 'global_variable',
				'dirty' => true,
			)
		);
		$this->manager->add_setting( $setting_id, $setting_args );
	}

	$this->manager->add_panel(
		'widgets',
		array(
			'type'                     => 'widgets',
			'title'                    => __( 'Widgets' ),
			'description'              => __( 'Widgets are independent sections of content that can be placed into widgetized areas provided by your theme (commonly called sidebars).' ),
			'priority'                 => 110,
			'active_callback'          => array( $this, 'is_panel_active' ),
			'auto_expand_sole_section' => true,
			'theme_supports'           => 'widgets',
		)
	);

	foreach ( $sidebars_widgets as $sidebar_id => $sidebar_widget_ids ) {
		if ( empty( $sidebar_widget_ids ) ) {
			$sidebar_widget_ids = array();
		}

		$is_registered_sidebar = is_registered_sidebar( $sidebar_id );
		$is_inactive_widgets   = ( 'wp_inactive_widgets' === $sidebar_id );
		$is_active_sidebar     = ( $is_registered_sidebar && ! $is_inactive_widgets );

		// Add setting for managing the sidebar's widgets.
		if ( $is_registered_sidebar || $is_inactive_widgets ) {
			$setting_id   = sprintf( 'sidebars_widgets[%s]', $sidebar_id );
			$setting_args = $this->get_setting_args( $setting_id );
			if ( ! $this->manager->get_setting( $setting_id ) ) {
				if ( ! $this->manager->is_theme_active() ) {
					$setting_args['dirty'] = true;
				}
				$this->manager->add_setting( $setting_id, $setting_args );
			}
			$new_setting_ids[] = $setting_id;

			// Add section to contain controls.
			$section_id = sprintf( 'sidebar-widgets-%s', $sidebar_id );
			if ( $is_active_sidebar ) {

				$section_args = array(
					'title'      => $wp_registered_sidebars[ $sidebar_id ]['name'],
					'priority'   => array_search( $sidebar_id, array_keys( $wp_registered_sidebars ), true ),
					'panel'      => 'widgets',
					'sidebar_id' => $sidebar_id,
				);

				if ( $use_widgets_block_editor ) {
					$section_args['description'] = '';
				} else {
					$section_args['description'] = $wp_registered_sidebars[ $sidebar_id ]['description'];
				}

				/**
				 * Filters Customizer widget section arguments for a given sidebar.
				 *
				 * @since 3.9.0
				 *
				 * @param array      $section_args Array of Customizer widget section arguments.
				 * @param string     $section_id   Customizer section ID.
				 * @param int|string $sidebar_id   Sidebar ID.
				 */
				$section_args = apply_filters( 'customizer_widgets_section_args', $section_args, $section_id, $sidebar_id );

				$section = new WP_Customize_Sidebar_Section( $this->manager, $section_id, $section_args );
				$this->manager->add_section( $section );

				if ( $use_widgets_block_editor ) {
					$control = new WP_Sidebar_Block_Editor_Control(
						$this->manager,
						$setting_id,
						array(
							'section'     => $section_id,
							'sidebar_id'  => $sidebar_id,
							'label'       => $section_args['title'],
							'description' => $section_args['description'],
						)
					);
				} else {
					$control = new WP_Widget_Area_Customize_Control(
						$this->manager,
						$setting_id,
						array(
							'section'    => $section_id,
							'sidebar_id' => $sidebar_id,
							'priority'   => count( $sidebar_widget_ids ), // place 'Add Widget' and 'Reorder' buttons at end.
						)
					);
				}

				$this->manager->add_control( $control );

				$new_setting_ids[] = $setting_id;
			}
		}

		if ( ! $use_widgets_block_editor ) {
			// Add a control for each active widget (located in a sidebar).
			foreach ( $sidebar_widget_ids as $i => $widget_id ) {

				// Skip widgets that may have gone away due to a plugin being deactivated.
				if ( ! $is_active_sidebar || ! isset( $wp_registered_widgets[ $widget_id ] ) ) {
					continue;
				}

				$registered_widget = $wp_registered_widgets[ $widget_id ];
				$setting_id        = $this->get_setting_id( $widget_id );
				$id_base           = $wp_registered_widget_controls[ $widget_id ]['id_base'];

				$control = new WP_Widget_Form_Customize_Control(
					$this->manager,
					$setting_id,
					array(
						'label'          => $registered_widget['name'],
						'section'        => $section_id,
						'sidebar_id'     => $sidebar_id,
						'widget_id'      => $widget_id,
						'widget_id_base' => $id_base,
						'priority'       => $i,
						'width'          => $wp_registered_widget_controls[ $widget_id ]['width'],
						'height'         => $wp_registered_widget_controls[ $widget_id ]['height'],
						'is_wide'        => $this->is_wide_widget( $widget_id ),
					)
				);
				$this->manager->add_control( $control );
			}
		}
	}

	if ( $this->manager->settings_previewed() ) {
		foreach ( $new_setting_ids as $new_setting_id ) {
			$this->manager->get_setting( $new_setting_id )->preview();
		}
	}
}

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