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Edit File: nav-menu-template.php

<?php /** * Nav Menu API: Template functions * * @package WordPress * @subpackage Nav_Menus * @since 3.0.0 */ // Don't load directly. if ( ! defined( 'ABSPATH' ) ) { die( '-1' ); } /** 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 $ancestor => $descendents ) { foreach ( (array) $descendents as $desc ) { $term_to_ancestor[ $desc ] = $ancestor; } } 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 $ancestor => $descendents ) { foreach ( (array) $descendents as $desc ) { $term_to_ancestor[ $desc ] = $ancestor; } } $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 ( (int) $menu_item->object_id === $queried_object_id && ( ( ! empty( $home_page_id ) && 'post_type' === $menu_item->type && $wp_query->is_home && $home_page_id === (int) $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; $ancestor_id = (int) $menu_item->db_id; while ( ( $ancestor_id = (int) get_post_meta( $ancestor_id, '_menu_item_menu_item_parent', true ) ) && ! in_array( $ancestor_id, $active_ancestor_item_ids, true ) ) { $active_ancestor_item_ids[] = $ancestor_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; $ancestor_id = (int) $menu_item->db_id; while ( ( $ancestor_id = (int) get_post_meta( $ancestor_id, '_menu_item_menu_item_parent', true ) ) && ! in_array( $ancestor_id, $active_ancestor_item_ids, true ) ) { $active_ancestor_item_ids[] = $ancestor_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; $ancestor_id = (int) $menu_item->db_id; while ( ( $ancestor_id = (int) get_post_meta( $ancestor_id, '_menu_item_menu_item_parent', true ) ) && ! in_array( $ancestor_id, $active_ancestor_item_ids, true ) ) { $active_ancestor_item_ids[] = $ancestor_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 === (int) $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 ) && (int) $parent_item->object_id !== $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 ) || (int) $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; }
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