summaryrefslogtreecommitdiffstats
path: root/wp-includes/nav-menu-template.php
diff options
context:
space:
mode:
Diffstat (limited to 'wp-includes/nav-menu-template.php')
-rw-r--r--wp-includes/nav-menu-template.php696
1 files changed, 696 insertions, 0 deletions
diff --git a/wp-includes/nav-menu-template.php b/wp-includes/nav-menu-template.php
new file mode 100644
index 0000000..46a4d95
--- /dev/null
+++ b/wp-includes/nav-menu-template.php
@@ -0,0 +1,696 @@
+<?php
+/**
+ * Nav Menu API: Template functions
+ *
+ * @package WordPress
+ * @subpackage Nav_Menus
+ * @since 3.0.0
+ */
+
+/** Walker_Nav_Menu class */
+require_once ABSPATH . WPINC . '/class-walker-nav-menu.php';
+
+/**
+ * Displays a navigation menu.
+ *
+ * @since 3.0.0
+ * @since 4.7.0 Added the `item_spacing` argument.
+ * @since 5.5.0 Added the `container_aria_label` argument.
+ *
+ * @param array $args {
+ * Optional. Array of nav menu arguments.
+ *
+ * @type int|string|WP_Term $menu Desired menu. Accepts a menu ID, slug, name, or object.
+ * Default empty.
+ * @type string $menu_class CSS class to use for the ul element which forms the menu.
+ * Default 'menu'.
+ * @type string $menu_id The ID that is applied to the ul element which forms the menu.
+ * Default is the menu slug, incremented.
+ * @type string $container Whether to wrap the ul, and what to wrap it with.
+ * Default 'div'.
+ * @type string $container_class Class that is applied to the container.
+ * Default 'menu-{menu slug}-container'.
+ * @type string $container_id The ID that is applied to the container. Default empty.
+ * @type string $container_aria_label The aria-label attribute that is applied to the container
+ * when it's a nav element. Default empty.
+ * @type callable|false $fallback_cb If the menu doesn't exist, a callback function will fire.
+ * Default is 'wp_page_menu'. Set to false for no fallback.
+ * @type string $before Text before the link markup. Default empty.
+ * @type string $after Text after the link markup. Default empty.
+ * @type string $link_before Text before the link text. Default empty.
+ * @type string $link_after Text after the link text. Default empty.
+ * @type bool $echo Whether to echo the menu or return it. Default true.
+ * @type int $depth How many levels of the hierarchy are to be included.
+ * 0 means all. Default 0.
+ * Default 0.
+ * @type object $walker Instance of a custom walker class. Default empty.
+ * @type string $theme_location Theme location to be used. Must be registered with
+ * register_nav_menu() in order to be selectable by the user.
+ * @type string $items_wrap How the list items should be wrapped. Uses printf() format with
+ * numbered placeholders. Default is a ul with an id and class.
+ * @type string $item_spacing Whether to preserve whitespace within the menu's HTML.
+ * Accepts 'preserve' or 'discard'. Default 'preserve'.
+ * }
+ * @return void|string|false Void if 'echo' argument is true, menu output if 'echo' is false.
+ * False if there are no items or no menu was found.
+ */
+function wp_nav_menu( $args = array() ) {
+ static $menu_id_slugs = array();
+
+ $defaults = array(
+ 'menu' => '',
+ 'container' => 'div',
+ 'container_class' => '',
+ 'container_id' => '',
+ 'container_aria_label' => '',
+ 'menu_class' => 'menu',
+ 'menu_id' => '',
+ 'echo' => true,
+ 'fallback_cb' => 'wp_page_menu',
+ 'before' => '',
+ 'after' => '',
+ 'link_before' => '',
+ 'link_after' => '',
+ 'items_wrap' => '<ul id="%1$s" class="%2$s">%3$s</ul>',
+ 'item_spacing' => 'preserve',
+ 'depth' => 0,
+ 'walker' => '',
+ 'theme_location' => '',
+ );
+
+ $args = wp_parse_args( $args, $defaults );
+
+ if ( ! in_array( $args['item_spacing'], array( 'preserve', 'discard' ), true ) ) {
+ // Invalid value, fall back to default.
+ $args['item_spacing'] = $defaults['item_spacing'];
+ }
+
+ /**
+ * Filters the arguments used to display a navigation menu.
+ *
+ * @since 3.0.0
+ *
+ * @see wp_nav_menu()
+ *
+ * @param array $args Array of wp_nav_menu() arguments.
+ */
+ $args = apply_filters( 'wp_nav_menu_args', $args );
+ $args = (object) $args;
+
+ /**
+ * Filters whether to short-circuit the wp_nav_menu() output.
+ *
+ * Returning a non-null value from the filter will short-circuit wp_nav_menu(),
+ * echoing that value if $args->echo is true, returning that value otherwise.
+ *
+ * @since 3.9.0
+ *
+ * @see wp_nav_menu()
+ *
+ * @param string|null $output Nav menu output to short-circuit with. Default null.
+ * @param stdClass $args An object containing wp_nav_menu() arguments.
+ */
+ $nav_menu = apply_filters( 'pre_wp_nav_menu', null, $args );
+
+ if ( null !== $nav_menu ) {
+ if ( $args->echo ) {
+ echo $nav_menu;
+ return;
+ }
+
+ return $nav_menu;
+ }
+
+ // Get the nav menu based on the requested menu.
+ $menu = wp_get_nav_menu_object( $args->menu );
+
+ // Get the nav menu based on the theme_location.
+ $locations = get_nav_menu_locations();
+ if ( ! $menu && $args->theme_location && $locations && isset( $locations[ $args->theme_location ] ) ) {
+ $menu = wp_get_nav_menu_object( $locations[ $args->theme_location ] );
+ }
+
+ // Get the first menu that has items if we still can't find a menu.
+ if ( ! $menu && ! $args->theme_location ) {
+ $menus = wp_get_nav_menus();
+ foreach ( $menus as $menu_maybe ) {
+ $menu_items = wp_get_nav_menu_items( $menu_maybe->term_id, array( 'update_post_term_cache' => false ) );
+ if ( $menu_items ) {
+ $menu = $menu_maybe;
+ break;
+ }
+ }
+ }
+
+ if ( empty( $args->menu ) ) {
+ $args->menu = $menu;
+ }
+
+ // If the menu exists, get its items.
+ if ( $menu && ! is_wp_error( $menu ) && ! isset( $menu_items ) ) {
+ $menu_items = wp_get_nav_menu_items( $menu->term_id, array( 'update_post_term_cache' => false ) );
+ }
+
+ /*
+ * If no menu was found:
+ * - Fall back (if one was specified), or bail.
+ *
+ * If no menu items were found:
+ * - Fall back, but only if no theme location was specified.
+ * - Otherwise, bail.
+ */
+ if ( ( ! $menu || is_wp_error( $menu ) || ( isset( $menu_items ) && empty( $menu_items ) && ! $args->theme_location ) )
+ && isset( $args->fallback_cb ) && $args->fallback_cb && is_callable( $args->fallback_cb ) ) {
+ return call_user_func( $args->fallback_cb, (array) $args );
+ }
+
+ if ( ! $menu || is_wp_error( $menu ) ) {
+ return false;
+ }
+
+ $nav_menu = '';
+ $items = '';
+
+ $show_container = false;
+ if ( $args->container ) {
+ /**
+ * Filters the list of HTML tags that are valid for use as menu containers.
+ *
+ * @since 3.0.0
+ *
+ * @param string[] $tags The acceptable HTML tags for use as menu containers.
+ * Default is array containing 'div' and 'nav'.
+ */
+ $allowed_tags = apply_filters( 'wp_nav_menu_container_allowedtags', array( 'div', 'nav' ) );
+
+ if ( is_string( $args->container ) && in_array( $args->container, $allowed_tags, true ) ) {
+ $show_container = true;
+ $class = $args->container_class ? ' class="' . esc_attr( $args->container_class ) . '"' : ' class="menu-' . $menu->slug . '-container"';
+ $id = $args->container_id ? ' id="' . esc_attr( $args->container_id ) . '"' : '';
+ $aria_label = ( 'nav' === $args->container && $args->container_aria_label ) ? ' aria-label="' . esc_attr( $args->container_aria_label ) . '"' : '';
+ $nav_menu .= '<' . $args->container . $id . $class . $aria_label . '>';
+ }
+ }
+
+ // Set up the $menu_item variables.
+ _wp_menu_item_classes_by_context( $menu_items );
+
+ $sorted_menu_items = array();
+ $menu_items_with_children = array();
+ foreach ( (array) $menu_items as $menu_item ) {
+ /*
+ * Fix invalid `menu_item_parent`. See: https://core.trac.wordpress.org/ticket/56926.
+ * Compare as strings. Plugins may change the ID to a string.
+ */
+ if ( (string) $menu_item->ID === (string) $menu_item->menu_item_parent ) {
+ $menu_item->menu_item_parent = 0;
+ }
+
+ $sorted_menu_items[ $menu_item->menu_order ] = $menu_item;
+ if ( $menu_item->menu_item_parent ) {
+ $menu_items_with_children[ $menu_item->menu_item_parent ] = true;
+ }
+ }
+
+ // Add the menu-item-has-children class where applicable.
+ if ( $menu_items_with_children ) {
+ foreach ( $sorted_menu_items as &$menu_item ) {
+ if ( isset( $menu_items_with_children[ $menu_item->ID ] ) ) {
+ $menu_item->classes[] = 'menu-item-has-children';
+ }
+ }
+ }
+
+ unset( $menu_items, $menu_item );
+
+ /**
+ * Filters the sorted list of menu item objects before generating the menu's HTML.
+ *
+ * @since 3.1.0
+ *
+ * @param array $sorted_menu_items The menu items, sorted by each menu item's menu order.
+ * @param stdClass $args An object containing wp_nav_menu() arguments.
+ */
+ $sorted_menu_items = apply_filters( 'wp_nav_menu_objects', $sorted_menu_items, $args );
+
+ $items .= walk_nav_menu_tree( $sorted_menu_items, $args->depth, $args );
+ unset( $sorted_menu_items );
+
+ // Attributes.
+ if ( ! empty( $args->menu_id ) ) {
+ $wrap_id = $args->menu_id;
+ } else {
+ $wrap_id = 'menu-' . $menu->slug;
+
+ while ( in_array( $wrap_id, $menu_id_slugs, true ) ) {
+ if ( preg_match( '#-(\d+)$#', $wrap_id, $matches ) ) {
+ $wrap_id = preg_replace( '#-(\d+)$#', '-' . ++$matches[1], $wrap_id );
+ } else {
+ $wrap_id = $wrap_id . '-1';
+ }
+ }
+ }
+ $menu_id_slugs[] = $wrap_id;
+
+ $wrap_class = $args->menu_class ? $args->menu_class : '';
+
+ /**
+ * Filters the HTML list content for navigation menus.
+ *
+ * @since 3.0.0
+ *
+ * @see wp_nav_menu()
+ *
+ * @param string $items The HTML list content for the menu items.
+ * @param stdClass $args An object containing wp_nav_menu() arguments.
+ */
+ $items = apply_filters( 'wp_nav_menu_items', $items, $args );
+ /**
+ * Filters the HTML list content for a specific navigation menu.
+ *
+ * @since 3.0.0
+ *
+ * @see wp_nav_menu()
+ *
+ * @param string $items The HTML list content for the menu items.
+ * @param stdClass $args An object containing wp_nav_menu() arguments.
+ */
+ $items = apply_filters( "wp_nav_menu_{$menu->slug}_items", $items, $args );
+
+ // Don't print any markup if there are no items at this point.
+ if ( empty( $items ) ) {
+ return false;
+ }
+
+ $nav_menu .= sprintf( $args->items_wrap, esc_attr( $wrap_id ), esc_attr( $wrap_class ), $items );
+ unset( $items );
+
+ if ( $show_container ) {
+ $nav_menu .= '</' . $args->container . '>';
+ }
+
+ /**
+ * Filters the HTML content for navigation menus.
+ *
+ * @since 3.0.0
+ *
+ * @see wp_nav_menu()
+ *
+ * @param string $nav_menu The HTML content for the navigation menu.
+ * @param stdClass $args An object containing wp_nav_menu() arguments.
+ */
+ $nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args );
+
+ if ( $args->echo ) {
+ echo $nav_menu;
+ } else {
+ return $nav_menu;
+ }
+}
+
+/**
+ * Adds the class property classes for the current context, if applicable.
+ *
+ * @access private
+ * @since 3.0.0
+ *
+ * @global WP_Query $wp_query WordPress Query object.
+ * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
+ *
+ * @param array $menu_items The current menu item objects to which to add the class property information.
+ */
+function _wp_menu_item_classes_by_context( &$menu_items ) {
+ global $wp_query, $wp_rewrite;
+
+ $queried_object = $wp_query->get_queried_object();
+ $queried_object_id = (int) $wp_query->queried_object_id;
+
+ $active_object = '';
+ $active_ancestor_item_ids = array();
+ $active_parent_item_ids = array();
+ $active_parent_object_ids = array();
+ $possible_taxonomy_ancestors = array();
+ $possible_object_parents = array();
+ $home_page_id = (int) get_option( 'page_for_posts' );
+
+ if ( $wp_query->is_singular && ! empty( $queried_object->post_type ) && ! is_post_type_hierarchical( $queried_object->post_type ) ) {
+ foreach ( (array) get_object_taxonomies( $queried_object->post_type ) as $taxonomy ) {
+ if ( is_taxonomy_hierarchical( $taxonomy ) ) {
+ $term_hierarchy = _get_term_hierarchy( $taxonomy );
+ $terms = wp_get_object_terms( $queried_object_id, $taxonomy, array( 'fields' => 'ids' ) );
+ if ( is_array( $terms ) ) {
+ $possible_object_parents = array_merge( $possible_object_parents, $terms );
+ $term_to_ancestor = array();
+ foreach ( (array) $term_hierarchy as $anc => $descs ) {
+ foreach ( (array) $descs as $desc ) {
+ $term_to_ancestor[ $desc ] = $anc;
+ }
+ }
+
+ foreach ( $terms as $desc ) {
+ do {
+ $possible_taxonomy_ancestors[ $taxonomy ][] = $desc;
+ if ( isset( $term_to_ancestor[ $desc ] ) ) {
+ $_desc = $term_to_ancestor[ $desc ];
+ unset( $term_to_ancestor[ $desc ] );
+ $desc = $_desc;
+ } else {
+ $desc = 0;
+ }
+ } while ( ! empty( $desc ) );
+ }
+ }
+ }
+ }
+ } elseif ( ! empty( $queried_object->taxonomy ) && is_taxonomy_hierarchical( $queried_object->taxonomy ) ) {
+ $term_hierarchy = _get_term_hierarchy( $queried_object->taxonomy );
+ $term_to_ancestor = array();
+ foreach ( (array) $term_hierarchy as $anc => $descs ) {
+ foreach ( (array) $descs as $desc ) {
+ $term_to_ancestor[ $desc ] = $anc;
+ }
+ }
+ $desc = $queried_object->term_id;
+ do {
+ $possible_taxonomy_ancestors[ $queried_object->taxonomy ][] = $desc;
+ if ( isset( $term_to_ancestor[ $desc ] ) ) {
+ $_desc = $term_to_ancestor[ $desc ];
+ unset( $term_to_ancestor[ $desc ] );
+ $desc = $_desc;
+ } else {
+ $desc = 0;
+ }
+ } while ( ! empty( $desc ) );
+ }
+
+ $possible_object_parents = array_filter( $possible_object_parents );
+
+ $front_page_url = home_url();
+ $front_page_id = (int) get_option( 'page_on_front' );
+ $privacy_policy_page_id = (int) get_option( 'wp_page_for_privacy_policy' );
+
+ foreach ( (array) $menu_items as $key => $menu_item ) {
+
+ $menu_items[ $key ]->current = false;
+
+ $classes = (array) $menu_item->classes;
+ $classes[] = 'menu-item';
+ $classes[] = 'menu-item-type-' . $menu_item->type;
+ $classes[] = 'menu-item-object-' . $menu_item->object;
+
+ // This menu item is set as the 'Front Page'.
+ if ( 'post_type' === $menu_item->type && $front_page_id === (int) $menu_item->object_id ) {
+ $classes[] = 'menu-item-home';
+ }
+
+ // This menu item is set as the 'Privacy Policy Page'.
+ if ( 'post_type' === $menu_item->type && $privacy_policy_page_id === (int) $menu_item->object_id ) {
+ $classes[] = 'menu-item-privacy-policy';
+ }
+
+ // If the menu item corresponds to a taxonomy term for the currently queried non-hierarchical post object.
+ if ( $wp_query->is_singular && 'taxonomy' === $menu_item->type
+ && in_array( (int) $menu_item->object_id, $possible_object_parents, true )
+ ) {
+ $active_parent_object_ids[] = (int) $menu_item->object_id;
+ $active_parent_item_ids[] = (int) $menu_item->db_id;
+ $active_object = $queried_object->post_type;
+
+ // If the menu item corresponds to the currently queried post or taxonomy object.
+ } elseif (
+ $menu_item->object_id == $queried_object_id
+ && (
+ ( ! empty( $home_page_id ) && 'post_type' === $menu_item->type
+ && $wp_query->is_home && $home_page_id == $menu_item->object_id )
+ || ( 'post_type' === $menu_item->type && $wp_query->is_singular )
+ || ( 'taxonomy' === $menu_item->type
+ && ( $wp_query->is_category || $wp_query->is_tag || $wp_query->is_tax )
+ && $queried_object->taxonomy == $menu_item->object )
+ )
+ ) {
+ $classes[] = 'current-menu-item';
+ $menu_items[ $key ]->current = true;
+ $_anc_id = (int) $menu_item->db_id;
+
+ while (
+ ( $_anc_id = (int) get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) )
+ && ! in_array( $_anc_id, $active_ancestor_item_ids, true )
+ ) {
+ $active_ancestor_item_ids[] = $_anc_id;
+ }
+
+ if ( 'post_type' === $menu_item->type && 'page' === $menu_item->object ) {
+ // Back compat classes for pages to match wp_page_menu().
+ $classes[] = 'page_item';
+ $classes[] = 'page-item-' . $menu_item->object_id;
+ $classes[] = 'current_page_item';
+ }
+
+ $active_parent_item_ids[] = (int) $menu_item->menu_item_parent;
+ $active_parent_object_ids[] = (int) $menu_item->post_parent;
+ $active_object = $menu_item->object;
+
+ // If the menu item corresponds to the currently queried post type archive.
+ } elseif (
+ 'post_type_archive' === $menu_item->type
+ && is_post_type_archive( array( $menu_item->object ) )
+ ) {
+ $classes[] = 'current-menu-item';
+ $menu_items[ $key ]->current = true;
+ $_anc_id = (int) $menu_item->db_id;
+
+ while (
+ ( $_anc_id = (int) get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) )
+ && ! in_array( $_anc_id, $active_ancestor_item_ids, true )
+ ) {
+ $active_ancestor_item_ids[] = $_anc_id;
+ }
+
+ $active_parent_item_ids[] = (int) $menu_item->menu_item_parent;
+
+ // If the menu item corresponds to the currently requested URL.
+ } elseif ( 'custom' === $menu_item->object && isset( $_SERVER['HTTP_HOST'] ) ) {
+ $_root_relative_current = untrailingslashit( $_SERVER['REQUEST_URI'] );
+
+ // If it's the customize page then it will strip the query var off the URL before entering the comparison block.
+ if ( is_customize_preview() ) {
+ $_root_relative_current = strtok( untrailingslashit( $_SERVER['REQUEST_URI'] ), '?' );
+ }
+
+ $current_url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_root_relative_current );
+ $raw_item_url = strpos( $menu_item->url, '#' ) ? substr( $menu_item->url, 0, strpos( $menu_item->url, '#' ) ) : $menu_item->url;
+ $item_url = set_url_scheme( untrailingslashit( $raw_item_url ) );
+ $_indexless_current = untrailingslashit( preg_replace( '/' . preg_quote( $wp_rewrite->index, '/' ) . '$/', '', $current_url ) );
+
+ $matches = array(
+ $current_url,
+ urldecode( $current_url ),
+ $_indexless_current,
+ urldecode( $_indexless_current ),
+ $_root_relative_current,
+ urldecode( $_root_relative_current ),
+ );
+
+ if ( $raw_item_url && in_array( $item_url, $matches, true ) ) {
+ $classes[] = 'current-menu-item';
+ $menu_items[ $key ]->current = true;
+ $_anc_id = (int) $menu_item->db_id;
+
+ while (
+ ( $_anc_id = (int) get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) )
+ && ! in_array( $_anc_id, $active_ancestor_item_ids, true )
+ ) {
+ $active_ancestor_item_ids[] = $_anc_id;
+ }
+
+ if ( in_array( home_url(), array( untrailingslashit( $current_url ), untrailingslashit( $_indexless_current ) ), true ) ) {
+ // Back compat for home link to match wp_page_menu().
+ $classes[] = 'current_page_item';
+ }
+ $active_parent_item_ids[] = (int) $menu_item->menu_item_parent;
+ $active_parent_object_ids[] = (int) $menu_item->post_parent;
+ $active_object = $menu_item->object;
+
+ // Give front page item the 'current-menu-item' class when extra query arguments are involved.
+ } elseif ( $item_url == $front_page_url && is_front_page() ) {
+ $classes[] = 'current-menu-item';
+ }
+
+ if ( untrailingslashit( $item_url ) == home_url() ) {
+ $classes[] = 'menu-item-home';
+ }
+ }
+
+ // Back-compat with wp_page_menu(): add "current_page_parent" to static home page link for any non-page query.
+ if ( ! empty( $home_page_id ) && 'post_type' === $menu_item->type
+ && empty( $wp_query->is_page ) && $home_page_id == $menu_item->object_id
+ ) {
+ $classes[] = 'current_page_parent';
+ }
+
+ $menu_items[ $key ]->classes = array_unique( $classes );
+ }
+ $active_ancestor_item_ids = array_filter( array_unique( $active_ancestor_item_ids ) );
+ $active_parent_item_ids = array_filter( array_unique( $active_parent_item_ids ) );
+ $active_parent_object_ids = array_filter( array_unique( $active_parent_object_ids ) );
+
+ // Set parent's class.
+ foreach ( (array) $menu_items as $key => $parent_item ) {
+ $classes = (array) $parent_item->classes;
+ $menu_items[ $key ]->current_item_ancestor = false;
+ $menu_items[ $key ]->current_item_parent = false;
+
+ if (
+ isset( $parent_item->type )
+ && (
+ // Ancestral post object.
+ (
+ 'post_type' === $parent_item->type
+ && ! empty( $queried_object->post_type )
+ && is_post_type_hierarchical( $queried_object->post_type )
+ && in_array( (int) $parent_item->object_id, $queried_object->ancestors, true )
+ && $parent_item->object != $queried_object->ID
+ ) ||
+
+ // Ancestral term.
+ (
+ 'taxonomy' === $parent_item->type
+ && isset( $possible_taxonomy_ancestors[ $parent_item->object ] )
+ && in_array( (int) $parent_item->object_id, $possible_taxonomy_ancestors[ $parent_item->object ], true )
+ && (
+ ! isset( $queried_object->term_id ) ||
+ $parent_item->object_id != $queried_object->term_id
+ )
+ )
+ )
+ ) {
+ if ( ! empty( $queried_object->taxonomy ) ) {
+ $classes[] = 'current-' . $queried_object->taxonomy . '-ancestor';
+ } else {
+ $classes[] = 'current-' . $queried_object->post_type . '-ancestor';
+ }
+ }
+
+ if ( in_array( (int) $parent_item->db_id, $active_ancestor_item_ids, true ) ) {
+ $classes[] = 'current-menu-ancestor';
+
+ $menu_items[ $key ]->current_item_ancestor = true;
+ }
+ if ( in_array( (int) $parent_item->db_id, $active_parent_item_ids, true ) ) {
+ $classes[] = 'current-menu-parent';
+
+ $menu_items[ $key ]->current_item_parent = true;
+ }
+ if ( in_array( (int) $parent_item->object_id, $active_parent_object_ids, true ) ) {
+ $classes[] = 'current-' . $active_object . '-parent';
+ }
+
+ if ( 'post_type' === $parent_item->type && 'page' === $parent_item->object ) {
+ // Back compat classes for pages to match wp_page_menu().
+ if ( in_array( 'current-menu-parent', $classes, true ) ) {
+ $classes[] = 'current_page_parent';
+ }
+ if ( in_array( 'current-menu-ancestor', $classes, true ) ) {
+ $classes[] = 'current_page_ancestor';
+ }
+ }
+
+ $menu_items[ $key ]->classes = array_unique( $classes );
+ }
+}
+
+/**
+ * Retrieves the HTML list content for nav menu items.
+ *
+ * @uses Walker_Nav_Menu to create HTML list content.
+ * @since 3.0.0
+ *
+ * @param array $items The menu items, sorted by each menu item's menu order.
+ * @param int $depth Depth of the item in reference to parents.
+ * @param stdClass $args An object containing wp_nav_menu() arguments.
+ * @return string The HTML list content for the menu items.
+ */
+function walk_nav_menu_tree( $items, $depth, $args ) {
+ $walker = ( empty( $args->walker ) ) ? new Walker_Nav_Menu() : $args->walker;
+
+ return $walker->walk( $items, $depth, $args );
+}
+
+/**
+ * Prevents a menu item ID from being used more than once.
+ *
+ * @since 3.0.1
+ * @access private
+ *
+ * @param string $id
+ * @param object $item
+ * @return string
+ */
+function _nav_menu_item_id_use_once( $id, $item ) {
+ static $_used_ids = array();
+
+ if ( in_array( $item->ID, $_used_ids, true ) ) {
+ return '';
+ }
+
+ $_used_ids[] = $item->ID;
+
+ return $id;
+}
+
+/**
+ * Remove the `menu-item-has-children` class from bottom level menu items.
+ *
+ * This runs on the {@see 'nav_menu_css_class'} filter. The $args and $depth
+ * parameters were added after the filter was originally introduced in
+ * WordPress 3.0.0 so this needs to allow for cases in which the filter is
+ * called without them.
+ *
+ * @see https://core.trac.wordpress.org/ticket/56926.
+ *
+ * @since 6.2.0
+ *
+ * @param string[] $classes Array of the CSS classes that are applied to the menu item's `<li>` element.
+ * @param WP_Post $menu_item The current menu item object.
+ * @param stdClass|false $args An object of wp_nav_menu() arguments. Default false ($args unspecified when filter is called).
+ * @param int|false $depth Depth of menu item. Default false ($depth unspecified when filter is called).
+ * @return string[] Modified nav menu classes.
+ */
+function wp_nav_menu_remove_menu_item_has_children_class( $classes, $menu_item, $args = false, $depth = false ) {
+ /*
+ * Account for the filter being called without the $args or $depth parameters.
+ *
+ * This occurs when a theme uses a custom walker calling the `nav_menu_css_class`
+ * filter using the legacy formats prior to the introduction of the $args and
+ * $depth parameters.
+ *
+ * As both of these parameters are required for this function to determine
+ * both the current and maximum depth of the menu tree, the function does not
+ * attempt to remove the `menu-item-has-children` class if these parameters
+ * are not set.
+ */
+ if ( false === $depth || false === $args ) {
+ return $classes;
+ }
+
+ // Max-depth is 1-based.
+ $max_depth = isset( $args->depth ) ? (int) $args->depth : 0;
+ // Depth is 0-based so needs to be increased by one.
+ $depth = $depth + 1;
+
+ // Complete menu tree is displayed.
+ if ( 0 === $max_depth ) {
+ return $classes;
+ }
+
+ /*
+ * Remove the `menu-item-has-children` class from bottom level menu items.
+ * -1 is used to display all menu items in one level so the class should
+ * be removed from all menu items.
+ */
+ if ( -1 === $max_depth || $depth >= $max_depth ) {
+ $classes = array_diff( $classes, array( 'menu-item-has-children' ) );
+ }
+
+ return $classes;
+}