File "nav-menus-20241117055031-20241124102657-20250225121519.php"

Full Path: /home2/sdektunc/cepali.edu.mx/wp-admin/css/css/css/css/css/css/css/nav-menus-20241117055031-20241124102657-20250225121519.php
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MIME-type: text/x-php
Charset: utf-8

<?php
/**
 * WordPress Administration for Navigation Menus
 * Interface functions
 *
 * @version 2.0.0
 *
 * @package WordPress
 * @subpackage Administration
 */

/** Load WordPress Administration Bootstrap */
require_once __DIR__ . '/admin.php';

// Load all the nav menu interface functions.
require_once ABSPATH . 'wp-admin/includes/nav-menu.php';

if ( ! current_theme_supports( 'menus' ) && ! current_theme_supports( 'widgets' ) ) {
	wp_die( __( 'Your theme does not support navigation menus or widgets.' ) );
}

// Permissions check.
if ( ! current_user_can( 'edit_theme_options' ) ) {
	wp_die(
		'<h1>' . __( 'You need a higher level of permission.' ) . '</h1>' .
		'<p>' . __( 'Sorry, you are not allowed to edit theme options on this site.' ) . '</p>',
		403
	);
}

// Used in the HTML title tag.
$title = __( 'Menus' );

wp_enqueue_script( 'nav-menu' );

if ( wp_is_mobile() ) {
	wp_enqueue_script( 'jquery-touch-punch' );
}

// Container for any messages displayed to the user.
$messages = array();

// Container that stores the name of the active menu.
$nav_menu_selected_title = '';

// The menu id of the current menu being edited.
$nav_menu_selected_id = isset( $_REQUEST['menu'] ) ? (int) $_REQUEST['menu'] : 0;

// Get existing menu locations assignments.
$locations      = get_registered_nav_menus();
$menu_locations = get_nav_menu_locations();
$num_locations  = count( array_keys( $locations ) );

// Allowed actions: add, update, delete.
$action = isset( $_REQUEST['action'] ) ? $_REQUEST['action'] : 'edit';

/*
 * If a JSON blob of navigation menu data is found, expand it and inject it
 * into `$_POST` to avoid PHP `max_input_vars` limitations. See #14134.
 */
_wp_expand_nav_menu_post_data();

switch ( $action ) {
	case 'add-menu-item':
		check_admin_referer( 'add-menu_item', 'menu-settings-column-nonce' );

		if ( isset( $_REQUEST['nav-menu-locations'] ) ) {
			set_theme_mod( 'nav_menu_locations', array_map( 'absint', $_REQUEST['menu-locations'] ) );
		} elseif ( isset( $_REQUEST['menu-item'] ) ) {
			wp_save_nav_menu_items( $nav_menu_selected_id, $_REQUEST['menu-item'] );
		}

		break;

	case 'move-down-menu-item':
		// Moving down a menu item is the same as moving up the next in order.
		check_admin_referer( 'move-menu_item' );

		$menu_item_id = isset( $_REQUEST['menu-item'] ) ? (int) $_REQUEST['menu-item'] : 0;

		if ( is_nav_menu_item( $menu_item_id ) ) {
			$menus = isset( $_REQUEST['menu'] ) ? array( (int) $_REQUEST['menu'] ) : wp_get_object_terms( $menu_item_id, 'nav_menu', array( 'fields' => 'ids' ) );

			if ( ! is_wp_error( $menus ) && ! empty( $menus[0] ) ) {
				$menu_id            = (int) $menus[0];
				$ordered_menu_items = wp_get_nav_menu_items( $menu_id );
				$menu_item_data     = (array) wp_setup_nav_menu_item( get_post( $menu_item_id ) );

				// Set up the data we need in one pass through the array of menu items.
				$dbids_to_orders = array();
				$orders_to_dbids = array();

				foreach ( (array) $ordered_menu_items as $ordered_menu_item_object ) {
					if ( isset( $ordered_menu_item_object->ID ) ) {
						if ( isset( $ordered_menu_item_object->menu_order ) ) {
							$dbids_to_orders[ $ordered_menu_item_object->ID ]         = $ordered_menu_item_object->menu_order;
							$orders_to_dbids[ $ordered_menu_item_object->menu_order ] = $ordered_menu_item_object->ID;
						}
					}
				}

				// Get next in order.
				if ( isset( $orders_to_dbids[ $dbids_to_orders[ $menu_item_id ] + 1 ] ) ) {
					$next_item_id   = $orders_to_dbids[ $dbids_to_orders[ $menu_item_id ] + 1 ];
					$next_item_data = (array) wp_setup_nav_menu_item( get_post( $next_item_id ) );

					// If not siblings of same parent, bubble menu item up but keep order.
					if ( ! empty( $menu_item_data['menu_item_parent'] )
						&& ( empty( $next_item_data['menu_item_parent'] )
							|| (int) $next_item_data['menu_item_parent'] !== (int) $menu_item_data['menu_item_parent'] )
					) {
						if ( in_array( (int) $menu_item_data['menu_item_parent'], $orders_to_dbids, true ) ) {
							$parent_db_id = (int) $menu_item_data['menu_item_parent'];
						} else {
							$parent_db_id = 0;
						}

						$parent_object = wp_setup_nav_menu_item( get_post( $parent_db_id ) );

						if ( ! is_wp_error( $parent_object ) ) {
							$parent_data                        = (array) $parent_object;
							$menu_item_data['menu_item_parent'] = $parent_data['menu_item_parent'];

							// Reset invalid `menu_item_parent`.
							$menu_item_data = _wp_reset_invalid_menu_item_parent( $menu_item_data );

							update_post_meta( $menu_item_data['ID'], '_menu_item_menu_item_parent', (int) $menu_item_data['menu_item_parent'] );
						}

						// Make menu item a child of its next sibling.
					} else {
						$next_item_data['menu_order'] = $next_item_data['menu_order'] - 1;
						$menu_item_data['menu_order'] = $menu_item_data['menu_order'] + 1;

						$menu_item_data['menu_item_parent'] = $next_item_data['ID'];

						// Reset invalid `menu_item_parent`.
						$menu_item_data = _wp_reset_invalid_menu_item_parent( $menu_item_data );

						update_post_meta( $menu_item_data['ID'], '_menu_item_menu_item_parent', (int) $menu_item_data['menu_item_parent'] );

						wp_update_post( $menu_item_data );
						wp_update_post( $next_item_data );
					}

					// The item is last but still has a parent, so bubble up.
				} elseif ( ! empty( $menu_item_data['menu_item_parent'] )
					&& in_array( (int) $menu_item_data['menu_item_parent'], $orders_to_dbids, true )
				) {
					$menu_item_data['menu_item_parent'] = (int) get_post_meta( $menu_item_data['menu_item_parent'], '_menu_item_menu_item_parent', true );

					// Reset invalid `menu_item_parent`.
					$menu_item_data = _wp_reset_invalid_menu_item_parent( $menu_item_data );

					update_post_meta( $menu_item_data['ID'], '_menu_item_menu_item_parent', (int) $menu_item_data['menu_item_parent'] );
				}
			}
		}

		break;

	case 'move-up-menu-item':
		check_admin_referer( 'move-menu_item' );

		$menu_item_id = isset( $_REQUEST['menu-item'] ) ? (int) $_REQUEST['menu-item'] : 0;

		if ( is_nav_menu_item( $menu_item_id ) ) {
			if ( isset( $_REQUEST['menu'] ) ) {
				$menus = array( (int) $_REQUEST['menu'] );
			} else {
				$menus = wp_get_object_terms( $menu_item_id, 'nav_menu', array( 'fields' => 'ids' ) );
			}

			if ( ! is_wp_error( $menus ) && ! empty( $menus[0] ) ) {
				$menu_id            = (int) $menus[0];
				$ordered_menu_items = wp_get_nav_menu_items( $menu_id );
				$menu_item_data     = (array) wp_setup_nav_menu_item( get_post( $menu_item_id ) );

				// Set up the data we need in one pass through the array of menu items.
				$dbids_to_orders = array();
				$orders_to_dbids = array();

				foreach ( (array) $ordered_menu_items as $ordered_menu_item_object ) {
					if ( isset( $ordered_menu_item_object->ID ) ) {
						if ( isset( $ordered_menu_item_object->menu_order ) ) {
							$dbids_to_orders[ $ordered_menu_item_object->ID ]         = $ordered_menu_item_object->menu_order;
							$orders_to_dbids[ $ordered_menu_item_object->menu_order ] = $ordered_menu_item_object->ID;
						}
					}
				}

				// If this menu item is not first.
				if ( ! empty( $dbids_to_orders[ $menu_item_id ] )
					&& ! empty( $orders_to_dbids[ $dbids_to_orders[ $menu_item_id ] - 1 ] )
				) {

					// If this menu item is a child of the previous.
					if ( ! empty( $menu_item_data['menu_item_parent'] )
						&& in_array( (int) $menu_item_data['menu_item_parent'], array_keys( $dbids_to_orders ), true )
						&& isset( $orders_to_dbids[ $dbids_to_orders[ $menu_item_id ] - 1 ] )
						&& ( (int) $menu_item_data['menu_item_parent'] === $orders_to_dbids[ $dbids_to_orders[ $menu_item_id ] - 1 ] )
					) {
						if ( in_array( (int) $menu_item_data['menu_item_parent'], $orders_to_dbids, true ) ) {
							$parent_db_id = (int) $menu_item_data['menu_item_parent'];
						} else {
							$parent_db_id = 0;
						}

						$parent_object = wp_setup_nav_menu_item( get_post( $parent_db_id ) );

						if ( ! is_wp_error( $parent_object ) ) {
							$parent_data = (array) $parent_object;

							/*
							 * If there is something before the parent and parent a child of it,
							 * make menu item a child also of it.
							 */
							if ( ! empty( $dbids_to_orders[ $parent_db_id ] )
								&& ! empty( $orders_to_dbids[ $dbids_to_orders[ $parent_db_id ] - 1 ] )
								&& ! empty( $parent_data['menu_item_parent'] )
							) {
								$menu_item_data['menu_item_parent'] = $parent_data['menu_item_parent'];

								/*
								* Else if there is something before parent and parent not a child of it,
								* make menu item a child of that something's parent
								*/
							} elseif ( ! empty( $dbids_to_orders[ $parent_db_id ] )
								&& ! empty( $orders_to_dbids[ $dbids_to_orders[ $parent_db_id ] - 1 ] )
							) {
								$_possible_parent_id = (int) get_post_meta( $orders_to_dbids[ $dbids_to_orders[ $parent_db_id ] - 1 ], '_menu_item_menu_item_parent', true );

								if ( in_array( $_possible_parent_id, array_keys( $dbids_to_orders ), true ) ) {
									$menu_item_data['menu_item_parent'] = $_possible_parent_id;
								} else {
									$menu_item_data['menu_item_parent'] = 0;
								}

								// Else there isn't something before the parent.
							} else {
								$menu_item_data['menu_item_parent'] = 0;
							}

							// Set former parent's [menu_order] to that of menu-item's.
							$parent_data['menu_order'] = $parent_data['menu_order'] + 1;

							// Set menu-item's [menu_order] to that of former parent.
							$menu_item_data['menu_order'] = $menu_item_data['menu_order'] - 1;

							// Save changes.
							update_post_meta( $menu_item_data['ID'], '_menu_item_menu_item_parent', (int) $menu_item_data['menu_item_parent'] );
							wp_update_post( $menu_item_data );
							wp_update_post( $parent_data );
						}

						// Else this menu item is not a child of the previous.
					} elseif ( empty( $menu_item_data['menu_order'] )
						|| empty( $menu_item_data['menu_item_parent'] )
						|| ! in_array( (int) $menu_item_data['menu_item_parent'], array_keys( $dbids_to_orders ), true )
						|| empty( $orders_to_dbids[ $dbids_to_orders[ $menu_item_id ] - 1 ] )
						|| $orders_to_dbids[ $dbids_to_orders[ $menu_item_id ] - 1 ] !== (int) $menu_item_data['menu_item_parent']
					) {
						// Just make it a child of the previous; keep the order.
						$menu_item_data['menu_item_parent'] = (int) $orders_to_dbids[ $dbids_to_orders[ $menu_item_id ] - 1 ];

						// Reset invalid `menu_item_parent`.
						$menu_item_data = _wp_reset_invalid_menu_item_parent( $menu_item_data );

						update_post_meta( $menu_item_data['ID'], '_menu_item_menu_item_parent', (int) $menu_item_data['menu_item_parent'] );
						wp_update_post( $menu_item_data );
					}
				}
			}
		}

		break;

	case 'delete-menu-item':
		$menu_item_id = (int) $_REQUEST['menu-item'];

		check_admin_referer( 'delete-menu_item_' . $menu_item_id );

		if ( is_nav_menu_item( $menu_item_id ) && wp_delete_post( $menu_item_id, true ) ) {
			$messages[] = wp_get_admin_notice(
				__( 'The menu item has been successfully deleted.' ),
				array(
					'id'                 => 'message',
					'additional_classes' => array( 'updated' ),
					'dismissible'        => true,
				)
			);
		}

		break;

	case 'delete':
		check_admin_referer( 'delete-nav_menu-' . $nav_menu_selected_id );

		if ( is_nav_menu( $nav_menu_selected_id ) ) {
			$deletion = wp_delete_nav_menu( $nav_menu_selected_id );
		} else {
			// Reset the selected menu.
			$nav_menu_selected_id = 0;
			unset( $_REQUEST['menu'] );
		}

		if ( ! isset( $deletion ) ) {
			break;
		}

		if ( is_wp_error( $deletion ) ) {
			$messages[] = wp_get_admin_notice(
				$deletion->get_error_message(),
				array(
					'id'                 => 'message',
					'additional_classes' => array( 'error' ),
					'dismissible'        => true,
				)
			);
		} else {
			$messages[] = wp_get_admin_notice(
				__( 'The menu has been successfully deleted.' ),
				array(
					'id'                 => 'message',
					'additional_classes' => array( 'updated' ),
					'dismissible'        => true,
				)
			);
		}

		break;

	case 'delete_menus':
		check_admin_referer( 'nav_menus_bulk_actions' );

		foreach ( $_REQUEST['delete_menus'] as $menu_id_to_delete ) {
			if ( ! is_nav_menu( $menu_id_to_delete ) ) {
				continue;
			}

			$deletion = wp_delete_nav_menu( $menu_id_to_delete );

			if ( is_wp_error( $deletion ) ) {
				$messages[]     = wp_get_admin_notice(
					$deletion->get_error_message(),
					array(
						'id'                 => 'message',
						'additional_classes' => array( 'error' ),
						'dismissible'        => true,
					)
				);
				$deletion_error = true;
			}
		}

		if ( empty( $deletion_error ) ) {
			$messages[] = wp_get_admin_notice(
				__( 'Selected menus have been successfully deleted.' ),
				array(
					'id'                 => 'message',
					'additional_classes' => array( 'updated' ),
					'dismissible'        => true,
				)
			);
		}

		break;

	case 'update':
		check_admin_referer( 'update-nav_menu', 'update-nav-menu-nonce' );

		// Merge new and existing menu locations if any new ones are set.
		$new_menu_locations = array();
		if ( isset( $_POST['menu-locations'] ) ) {
			$new_menu_locations = array_map( 'absint', $_POST['menu-locations'] );
			$menu_locations     = array_merge( $menu_locations, $new_menu_locations );
		}

		// Add Menu.
		if ( 0 === $nav_menu_selected_id ) {
			$new_menu_title = trim( esc_html( $_POST['menu-name'] ) );

			if ( $new_menu_title ) {
				$_nav_menu_selected_id = wp_update_nav_menu_object( 0, array( 'menu-name' => $new_menu_title ) );

				if ( is_wp_error( $_nav_menu_selected_id ) ) {
					$messages[] = wp_get_admin_notice(
						$_nav_menu_selected_id->get_error_message(),
						array(
							'id'                 => 'message',
							'additional_classes' => array( 'error' ),
							'dismissible'        => true,
						)
					);
				} else {
					$_menu_object            = wp_get_nav_menu_object( $_nav_menu_selected_id );
					$nav_menu_selected_id    = $_nav_menu_selected_id;
					$nav_menu_selected_title = $_menu_object->name;

					if ( isset( $_REQUEST['menu-item'] ) ) {
						wp_save_nav_menu_items( $nav_menu_selected_id, absint( $_REQUEST['menu-item'] ) );
					}

					if ( isset( $_REQUEST['zero-menu-state'] ) || ! empty( $_POST['auto-add-pages'] ) ) {
						// If there are menu items, add them.
						wp_nav_menu_update_menu_items( $nav_menu_selected_id, $nav_menu_selected_title );
					}

					if ( isset( $_REQUEST['zero-menu-state'] ) ) {
						// Auto-save nav_menu_locations.
						$locations = get_nav_menu_locations();

						foreach ( $locations as $location => $menu_id ) {
								$locations[ $location ] = $nav_menu_selected_id;
								break; // There should only be 1.
						}

						set_theme_mod( 'nav_menu_locations', $locations );
					} elseif ( count( $new_menu_locations ) > 0 ) {
						// If locations have been selected for the new menu, save those.
						$locations = get_nav_menu_locations();

						foreach ( array_keys( $new_menu_locations ) as $location ) {
							$locations[ $location ] = $nav_menu_selected_id;
						}

						set_theme_mod( 'nav_menu_locations', $locations );
					}

					if ( isset( $_REQUEST['use-location'] ) ) {
						$locations      = get_registered_nav_menus();
						$menu_locations = get_nav_menu_locations();

						if ( isset( $locations[ $_REQUEST['use-location'] ] ) ) {
							$menu_locations[ $_REQUEST['use-location'] ] = $nav_menu_selected_id;
						}

						set_theme_mod( 'nav_menu_locations', $menu_locations );
					}

					wp_redirect( admin_url( 'nav-menus.php?menu=' . $_nav_menu_selected_id ) );
					exit;
				}
			} else {
				$messages[] = wp_get_admin_notice(
					__( 'Please enter a valid menu name.' ),
					array(
						'id'                 => 'message',
						'additional_classes' => array( 'error' ),
						'dismissible'        => true,
					)
				);
			}

			// Update existing menu.
		} else {
			// Remove menu locations that have been unchecked.
			foreach ( $locations as $location => $description ) {
				if ( ( empty( $_POST['menu-locations'] ) || empty( $_POST['menu-locations'][ $location ] ) )
					&& isset( $menu_locations[ $location ] ) && $menu_locations[ $location ] === $nav_menu_selected_id
				) {
					unset( $menu_locations[ $location ] );
				}
			}

			// Set menu locations.
			set_theme_mod( 'nav_menu_locations', $menu_locations );

			$_menu_object = wp_get_nav_menu_object( $nav_menu_selected_id );

			$menu_title = trim( esc_html( $_POST['menu-name'] ) );

			if ( ! $menu_title ) {
				$messages[] = wp_get_admin_notice(
					__( 'Please enter a valid menu name.' ),
					array(
						'id'                 => 'message',
						'additional_classes' => array( 'error' ),
						'dismissible'        => true,
					)
				);
				$menu_title = $_menu_object->name;
			}

			if ( ! is_wp_error( $_menu_object ) ) {
				$_nav_menu_selected_id = wp_update_nav_menu_object( $nav_menu_selected_id, array( 'menu-name' => $menu_title ) );

				if ( is_wp_error( $_nav_menu_selected_id ) ) {
					$_menu_object = $_nav_menu_selected_id;
					$messages[]   = wp_get_admin_notice(
						$_nav_menu_selected_id->get_error_message(),
						array(
							'id'                 => 'message',
							'additional_classes' => array( 'error' ),
							'dismissible'        => true,
						)
					);
				} else {
					$_menu_object            = wp_get_nav_menu_object( $_nav_menu_selected_id );
					$nav_menu_selected_title = $_menu_object->name;
				}
			}

			// Update menu items.
			if ( ! is_wp_error( $_menu_object ) ) {
				$messages = array_merge( $messages, wp_nav_menu_update_menu_items( $_nav_menu_selected_id, $nav_menu_selected_title ) );

				// If the menu ID changed, redirect to the new URL.
				if ( $nav_menu_selected_id !== $_nav_menu_selected_id ) {
					wp_redirect( admin_url( 'nav-menus.php?menu=' . (int) $_nav_menu_selected_id ) );
					exit;
				}
			}
		}

		break;

	case 'locations':
		if ( ! $num_locations ) {
			wp_redirect( admin_url( 'nav-menus.php' ) );
			exit;
		}

		add_filter( 'screen_options_show_screen', '__return_false' );

		if ( isset( $_POST['menu-locations'] ) ) {
			check_admin_referer( 'save-menu-locations' );

			$new_menu_locations = array_map( 'absint', $_POST['menu-locations'] );
			$menu_locations     = array_merge( $menu_locations, $new_menu_locations );
			// Set menu locations.
			set_theme_mod( 'nav_menu_locations', $menu_locations );

			$messages[] = wp_get_admin_notice(
				__( 'Menu locations updated.' ),
				array(
					'id'                 => 'message',
					'additional_classes' => array( 'updated' ),
					'dismissible'        => true,
				)
			);
		}

		break;
}

// Get all nav menus.
$nav_menus  = wp_get_nav_menus();
$menu_count = count( $nav_menus );

// Are we on the add new screen?
$add_new_screen = ( isset( $_GET['menu'] ) && 0 === (int) $_GET['menu'] ) ? true : false;

$locations_screen = ( isset( $_GET['action'] ) && 'locations' === $_GET['action'] ) ? true : false;

$page_count = wp_count_posts( 'page' );

/*
 * If we have one theme location, and zero menus, we take them right
 * into editing their first menu.
 */
if ( 1 === count( get_registered_nav_menus() ) && ! $add_new_screen
	&& empty( $nav_menus ) && ! empty( $page_count->publish )
) {
	$one_theme_location_no_menus = true;
} else {
	$one_theme_location_no_menus = false;
}

$nav_menus_l10n = array(
	'oneThemeLocationNoMenus' => $one_theme_location_no_menus,
	'moveUp'                  => __( 'Move up one' ),
	'moveDown'                => __( 'Move down one' ),
	'moveToTop'               => __( 'Move to the top' ),
	/* translators: %s: Previous item name. */
	'moveUnder'               => __( 'Move under %s' ),
	/* translators: %s: Previous item name. */
	'moveOutFrom'             => __( 'Move out from under %s' ),
	/* translators: %s: Previous item name. */
	'under'                   => __( 'Under %s' ),
	/* translators: %s: Previous item name. */
	'outFrom'                 => __( 'Out from under %s' ),
	/* translators: 1: Item name, 2: Item position, 3: Total number of items. */
	'menuFocus'               => __( '%1$s. Menu item %2$d of %3$d.' ),
	/* translators: 1: Item name, 2: Item position, 3: Parent item name. */
	'subMenuFocus'            => __( '%1$s. Sub item number %2$d under %3$s.' ),
	/* translators: %s: Item name. */
	'menuItemDeletion'        => __( 'item %s' ),
	/* translators: %s: Item name. */
	'itemsDeleted'            => __( 'Deleted menu item: %s.' ),
	'itemAdded'               => __( 'Menu item added' ),
	'itemRemoved'             => __( 'Menu item removed' ),
	'movedUp'                 => __( 'Menu item moved up' ),
	'movedDown'               => __( 'Menu item moved down' ),
	'movedTop'                => __( 'Menu item moved to the top' ),
	'movedLeft'               => __( 'Menu item moved out of submenu' ),
	'movedRight'              => __( 'Menu item is now a sub-item' ),
);
wp_localize_script( 'nav-menu', 'menus', $nav_menus_l10n );

/*
 * Redirect to add screen if there are no menus and this users has either zero,
 * or more than 1 theme locations.
 */
if ( 0 === $menu_count && ! $add_new_screen && ! $one_theme_location_no_menus ) {
	wp_redirect( admin_url( 'nav-menus.php?action=edit&menu=0' ) );
}

// Get recently edited nav menu.
$recently_edited = absint( get_user_option( 'nav_menu_recently_edited' ) );
if ( empty( $recently_edited ) && is_nav_menu( $nav_menu_selected_id ) ) {
	$recently_edited = $nav_menu_selected_id;
}

// Use $recently_edited if none are selected.
if ( empty( $nav_menu_selected_id ) && ! isset( $_GET['menu'] ) && is_nav_menu( $recently_edited ) ) {
	$nav_menu_selected_id = $recently_edited;
}

// On deletion of menu, if another menu exists, show it.
if ( ! $add_new_screen && $menu_count > 0 && isset( $_GET['action'] ) && 'delete' === $_GET['action'] ) {
	$nav_menu_selected_id = $nav_menus[0]->term_id;
}

// Set $nav_menu_selected_id to 0 if no menus.
if ( $one_theme_location_no_menus ) {
	$nav_menu_selected_id = 0;
} elseif ( empty( $nav_menu_selected_id ) && ! empty( $nav_menus ) && ! $add_new_screen ) {
	// If we have no selection yet, and we have menus, set to the first one in the list.
	$nav_menu_selected_id = $nav_menus[0]->term_id;
}

// Update the user's setting.
if ( $nav_menu_selected_id !== $recently_edited && is_nav_menu( $nav_menu_selected_id ) ) {
	update_user_meta( $current_user->ID, 'nav_menu_recently_edited', $nav_menu_selected_id );
}

// If there's a menu, get its name.
if ( ! $nav_menu_selected_title && is_nav_menu( $nav_menu_selected_id ) ) {
	$_menu_object            = wp_get_nav_menu_object( $nav_menu_selected_id );
	$nav_menu_selected_title = ! is_wp_error( $_menu_object ) ? $_menu_object->name : '';
}

// Generate truncated menu names.
foreach ( (array) $nav_menus as $key => $_nav_menu ) {
	$nav_menus[ $key ]->truncated_name = wp_html_excerpt( $_nav_menu->name, 40, '&hellip;' );
}

// Retrieve menu locations.
if ( current_theme_supports( 'menus' ) ) {
	$locations      = get_registered_nav_menus();
	$menu_locations = get_nav_menu_locations();
}

/*
 * Ensure the user will be able to scroll horizontally
 * by adding a class for the max menu depth.
 *
 * @global int $_wp_nav_menu_max_depth
 */
global $_wp_nav_menu_max_depth;
$_wp_nav_menu_max_depth = 0;

// Calling wp_get_nav_menu_to_edit generates $_wp_nav_menu_max_depth.
if ( is_nav_menu( $nav_menu_selected_id ) ) {
	$menu_items  = wp_get_nav_menu_items( $nav_menu_selected_id, array( 'post_status' => 'any' ) );
	$edit_markup = wp_get_nav_menu_to_edit( $nav_menu_selected_id );
}

/**
 * @global int $_wp_nav_menu_max_depth
 *
 * @param string $classes
 * @return string
 */
function wp_nav_menu_max_depth( $classes ) {
	global $_wp_nav_menu_max_depth;
	return "$classes menu-max-depth-$_wp_nav_menu_max_depth";
}

add_filter( 'admin_body_class', 'wp_nav_menu_max_depth' );

wp_nav_menu_setup();
wp_initial_nav_menu_meta_boxes();

if ( ! current_theme_supports( 'menus' ) && ! $num_locations ) {
	$message_no_theme_support = sprintf(
		/* translators: %s: URL to Widgets screen. */
		__( 'Your theme does not natively support menus, but you can use them in sidebars by adding a &#8220;Navigation Menu&#8221; widget on the <a href="%s">Widgets</a> screen.' ),
		admin_url( 'widgets.php' )
	);
	$messages[] = wp_get_admin_notice(
		$message_no_theme_support,
		array(
			'id'                 => 'message',
			'additional_classes' => array( 'updated' ),
			'dismissible'        => true,
		)
	);
}

if ( ! $locations_screen ) : // Main tab.
	$overview  = '<p>' . __( 'This screen is used for managing your navigation menus.' ) . '</p>';
	$overview .= '<p>' . sprintf(
		/* translators: 1: URL to Widgets screen, 2 and 3: The names of the default themes. */
		__( 'Menus can be displayed in locations defined by your theme, even used in sidebars by adding a &#8220;Navigation Menu&#8221; widget on the <a href="%1$s">Widgets</a> screen. If your theme does not support the navigation menus feature (the default themes, %2$s and %3$s, do), you can learn about adding this support by following the documentation link to the side.' ),
		admin_url( 'widgets.php' ),
		'Twenty Twenty',
		'Twenty Twenty-One'
	) . '</p>';
	$overview .= '<p>' . __( 'From this screen you can:' ) . '</p>';
	$overview .= '<ul><li>' . __( 'Create, edit, and delete menus' ) . '</li>';
	$overview .= '<li>' . __( 'Add, organize, and modify individual menu items' ) . '</li></ul>';

	get_current_screen()->add_help_tab(
		array(
			'id'      => 'overview',
			'title'   => __( 'Overview' ),
			'content' => $overview,
		)
	);

	$menu_management  = '<p>' . __( 'The menu management box at the top of the screen is used to control which menu is opened in the editor below.' ) . '</p>';
	$menu_management .= '<ul><li>' . __( 'To edit an existing menu, <strong>choose a menu from the dropdown and click Select</strong>' ) . '</li>';
	$menu_management .= '<li>' . __( 'If you have not yet created any menus, <strong>click the &#8217;create a new menu&#8217; link</strong> to get started' ) . '</li></ul>';
	$menu_management .= '<p>' . __( 'You can assign theme locations to individual menus by <strong>selecting the desired settings</strong> at the bottom of the menu editor. To assign menus to all theme locations at once, <strong>visit the Manage Locations tab</strong> at the top of the screen.' ) . '</p>';

	get_current_screen()->add_help_tab(
		array(
			'id'      => 'menu-management',
			'title'   => __( 'Menu Management' ),
			'content' => $menu_management,
		)
	);

	$editing_menus  = '<p>' . __( 'Each navigation menu may contain a mix of links to pages, categories, custom URLs or other content types. Menu links are added by selecting items from the expanding boxes in the left-hand column below.' ) . '</p>';
	$editing_menus .= '<p>' . __( '<strong>Clicking the arrow to the right of any menu item</strong> in the editor will reveal a standard group of settings. Additional settings such as link target, CSS classes, link relationships, and link descriptions can be enabled and disabled via the Screen Options tab.' ) . '</p>';
	$editing_menus .= '<ul><li>' . __( 'Add one or several items at once by <strong>selecting the checkbox next to each item and clicking Add to Menu</strong>' ) . '</li>';
	$editing_menus .= '<li>' . __( 'To add a custom link, <strong>expand the Custom Links section, enter a URL and link text, and click Add to Menu</strong>' ) . '</li>';
	$editing_menus .= '<li>' . __( 'To reorganize menu items, <strong>drag and drop items with your mouse or use your keyboard</strong>. Drag or move a menu item a little to the right to make it a submenu' ) . '</li>';
	$editing_menus .= '<li>' . __( 'Delete a menu item by <strong>expanding it and clicking the Remove link</strong>' ) . '</li></ul>';

	get_current_screen()->add_help_tab(
		array(
			'id'      => 'editing-menus',
			'title'   => __( 'Editing Menus' ),
			'content' => $editing_menus,
		)
	);
else : // Locations tab.
	$locations_overview  = '<p>' . __( 'This screen is used for globally assigning menus to locations defined by your theme.' ) . '</p>';
	$locations_overview .= '<ul><li>' . __( 'To assign menus to one or more theme locations, <strong>select a menu from each location&#8217;s dropdown</strong>. When you are finished, <strong>click Save Changes</strong>' ) . '</li>';
	$locations_overview .= '<li>' . __( 'To edit a menu currently assigned to a theme location, <strong>click the adjacent &#8217;Edit&#8217; link</strong>' ) . '</li>';
	$locations_overview .= '<li>' . __( 'To ad