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&& ! in_array( $ancestor_id, $active_ancestor_item_ids, true )

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) {

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$active_ancestor_item_ids[] = $ancestor_id;

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}

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if ( in_array( home_url(), array( untrailingslashit( $current_url ), untrailingslashit( $_indexless_current ) ), true ) ) {

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// Back compat for home link to match wp_page_menu().

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$classes[] = 'current_page_item';

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}

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$active_parent_item_ids[] = (int) $menu_item->menu_item_parent;

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$active_parent_object_ids[] = (int) $menu_item->post_parent;

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$active_object = $menu_item->object;

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// Give front page item the 'current-menu-item' class when extra query arguments are involved.

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} elseif ( $item_url === $front_page_url && is_front_page() ) {

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$classes[] = 'current-menu-item';

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}

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if ( untrailingslashit( $item_url ) === home_url() ) {

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$classes[] = 'menu-item-home';

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}

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}

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// Back-compat with wp_page_menu(): add "current_page_parent" to static home page link for any non-page query.

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if ( ! empty( $home_page_id ) && 'post_type' === $menu_item->type

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&& empty( $wp_query->is_page ) && $home_page_id === (int) $menu_item->object_id

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) {

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$classes[] = 'current_page_parent';

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}

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$menu_items[ $key ]->classes = array_unique( $classes );

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}

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$active_ancestor_item_ids = array_filter( array_unique( $active_ancestor_item_ids ) );

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$active_parent_item_ids = array_filter( array_unique( $active_parent_item_ids ) );

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$active_parent_object_ids = array_filter( array_unique( $active_parent_object_ids ) );

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// Set parent's class.

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foreach ( (array) $menu_items as $key => $parent_item ) {

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$classes = (array) $parent_item->classes;

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$menu_items[ $key ]->current_item_ancestor = false;

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$menu_items[ $key ]->current_item_parent = false;

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if (

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isset( $parent_item->type )

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&& (

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// Ancestral post object.

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(

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'post_type' === $parent_item->type

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&& ! empty( $queried_object->post_type )

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&& is_post_type_hierarchical( $queried_object->post_type )

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&& in_array( (int) $parent_item->object_id, $queried_object->ancestors, true )

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&& (int) $parent_item->object_id !== $queried_object->ID

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) ||

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// Ancestral term.

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(

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'taxonomy' === $parent_item->type

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&& isset( $possible_taxonomy_ancestors[ $parent_item->object ] )

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&& in_array( (int) $parent_item->object_id, $possible_taxonomy_ancestors[ $parent_item->object ], true )

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&& (

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! isset( $queried_object->term_id ) ||

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(int) $parent_item->object_id !== $queried_object->term_id

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)

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)

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)

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) {

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if ( ! empty( $queried_object->taxonomy ) ) {

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$classes[] = 'current-' . $queried_object->taxonomy . '-ancestor';

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} else {

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$classes[] = 'current-' . $queried_object->post_type . '-ancestor';

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}

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}

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if ( in_array( (int) $parent_item->db_id, $active_ancestor_item_ids, true ) ) {

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$classes[] = 'current-menu-ancestor';

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$menu_items[ $key ]->current_item_ancestor = true;

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}

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if ( in_array( (int) $parent_item->db_id, $active_parent_item_ids, true ) ) {

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$classes[] = 'current-menu-parent';

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$menu_items[ $key ]->current_item_parent = true;

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}

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if ( in_array( (int) $parent_item->object_id, $active_parent_object_ids, true ) ) {

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$classes[] = 'current-' . $active_object . '-parent';

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}

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if ( 'post_type' === $parent_item->type && 'page' === $parent_item->object ) {

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// Back compat classes for pages to match wp_page_menu().

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if ( in_array( 'current-menu-parent', $classes, true ) ) {

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$classes[] = 'current_page_parent';

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}

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if ( in_array( 'current-menu-ancestor', $classes, true ) ) {

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$classes[] = 'current_page_ancestor';

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}

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}

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$menu_items[ $key ]->classes = array_unique( $classes );

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}

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}

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/**

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* Retrieves the HTML list content for nav menu items.

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* @uses Walker_Nav_Menu to create HTML list content.

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* @since 3.0.0

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* @param array $items The menu items, sorted by each menu item's menu order.

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* @param int $depth Depth of the item in reference to parents.

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* @param stdClass $args An object containing wp_nav_menu() arguments.

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* @return string The HTML list content for the menu items.

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function walk_nav_menu_tree( $items, $depth, $args ) {

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$walker = ( empty( $args->walker ) ) ? new Walker_Nav_Menu() : $args->walker;

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return $walker->walk( $items, $depth, $args );

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}

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/**

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* Prevents a menu item ID from being used more than once.

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* @since 3.0.1

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* @access private

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* @param string $id

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* @param object $item

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* @return string

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function _nav_menu_item_id_use_once( $id, $item ) {

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static $_used_ids = array();

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if ( in_array( $item->ID, $_used_ids, true ) ) {

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return '';

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}

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$_used_ids[] = $item->ID;

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return $id;

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}

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/**

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* Remove the `menu-item-has-children` class from bottom level menu items.

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* This runs on the {@see 'nav_menu_css_class'} filter. The $args and $depth

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* parameters were added after the filter was originally introduced in

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* WordPress 3.0.0 so this needs to allow for cases in which the filter is

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* called without them.

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* @see https://core.trac.wordpress.org/ticket/56926

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* @since 6.2.0

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* @param string[] $classes Array of the CSS classes that are applied to the menu item's `<li>` element.

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* @param WP_Post $menu_item The current menu item object.

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* @param stdClass|false $args An object of wp_nav_menu() arguments. Default false ($args unspecified when filter is called).

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* @param int|false $depth Depth of menu item. Default false ($depth unspecified when filter is called).

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* @return string[] Modified nav menu classes.

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function wp_nav_menu_remove_menu_item_has_children_class( $classes, $menu_item, $args = false, $depth = false ) {

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* Account for the filter being called without the $args or $depth parameters.

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* This occurs when a theme uses a custom walker calling the `nav_menu_css_class`

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* filter using the legacy formats prior to the introduction of the $args and

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* $depth parameters.

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* As both of these parameters are required for this function to determine

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* both the current and maximum depth of the menu tree, the function does not

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* attempt to remove the `menu-item-has-children` class if these parameters

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* are not set.

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if ( false === $depth || false === $args ) {

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return $classes;

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}

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// Max-depth is 1-based.

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$max_depth = isset( $args->depth ) ? (int) $args->depth : 0;

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// Depth is 0-based so needs to be increased by one.

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$depth = $depth + 1;

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// Complete menu tree is displayed.

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if ( 0 === $max_depth ) {

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return $classes;

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}

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* Remove the `menu-item-has-children` class from bottom level menu items.

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* -1 is used to display all menu items in one level so the class should

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* be removed from all menu items.

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if ( -1 === $max_depth || $depth >= $max_depth ) {

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$classes = array_diff( $classes, array( 'menu-item-has-children' ) );

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}

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return $classes;

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}

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