--- /dev/null
+<?php
+/**
+ * Navigation Menu template functions
+ *
+ * @package WordPress
+ * @subpackage Nav_Menus
+ * @since 3.0.0
+ */
+
+/**
+ * Create HTML list of nav menu items.
+ *
+ * @package WordPress
+ * @since 3.0.0
+ * @uses Walker
+ */
+class Walker_Nav_Menu extends Walker {
+ /**
+ * @see Walker::$tree_type
+ * @since 3.0.0
+ * @var string
+ */
+ var $tree_type = array( 'post_type', 'taxonomy', 'custom' );
+
+ /**
+ * @see Walker::$db_fields
+ * @since 3.0.0
+ * @todo Decouple this.
+ * @var array
+ */
+ var $db_fields = array( 'parent' => 'menu_item_parent', 'id' => 'db_id' );
+
+ /**
+ * @see Walker::start_lvl()
+ * @since 3.0.0
+ *
+ * @param string $output Passed by reference. Used to append additional content.
+ * @param int $depth Depth of page. Used for padding.
+ */
+ function start_lvl(&$output, $depth) {
+ $indent = str_repeat("\t", $depth);
+ $output .= "\n$indent<ul class=\"sub-menu\">\n";
+ }
+
+ /**
+ * @see Walker::end_lvl()
+ * @since 3.0.0
+ *
+ * @param string $output Passed by reference. Used to append additional content.
+ * @param int $depth Depth of page. Used for padding.
+ */
+ function end_lvl(&$output, $depth) {
+ $indent = str_repeat("\t", $depth);
+ $output .= "$indent</ul>\n";
+ }
+
+ /**
+ * @see Walker::start_el()
+ * @since 3.0.0
+ *
+ * @param string $output Passed by reference. Used to append additional content.
+ * @param object $item Menu item data object.
+ * @param int $depth Depth of menu item. Used for padding.
+ * @param int $current_page Menu item ID.
+ * @param object $args
+ */
+ function start_el(&$output, $item, $depth, $args) {
+ global $wp_query;
+ $indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
+
+ $class_names = $value = '';
+
+ $classes = empty( $item->classes ) ? array() : (array) $item->classes;
+
+ $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) );
+ $class_names = ' class="' . esc_attr( $class_names ) . '"';
+
+ $output .= $indent . '<li id="menu-item-'. $item->ID . '"' . $value . $class_names .'>';
+
+ $attributes = ! empty( $item->attr_title ) ? ' title="' . esc_attr( $item->attr_title ) .'"' : '';
+ $attributes .= ! empty( $item->target ) ? ' target="' . esc_attr( $item->target ) .'"' : '';
+ $attributes .= ! empty( $item->xfn ) ? ' rel="' . esc_attr( $item->xfn ) .'"' : '';
+ $attributes .= ! empty( $item->url ) ? ' href="' . esc_attr( $item->url ) .'"' : '';
+
+ $item_output = $args->before;
+ $item_output .= '<a'. $attributes .'>';
+ $item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
+ $item_output .= '</a>';
+ $item_output .= $args->after;
+
+ $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
+ }
+
+ /**
+ * @see Walker::end_el()
+ * @since 3.0.0
+ *
+ * @param string $output Passed by reference. Used to append additional content.
+ * @param object $item Page data object. Not used.
+ * @param int $depth Depth of page. Not Used.
+ */
+ function end_el(&$output, $item, $depth) {
+ $output .= "</li>\n";
+ }
+}
+
+/**
+ * Displays a navigation menu.
+ *
+ * Optional $args contents:
+ *
+ * menu - The menu that is desired. Accepts (matching in order) id, slug, name. Defaults to blank.
+ * menu_class - CSS class to use for the ul element which forms the menu. Defaults to 'menu'.
+ * menu_id - The ID that is applied to the ul element which forms the menu. Defaults to the menu slug, incremented.
+ * container - Whether to wrap the ul, and what to wrap it with. Defaults to 'div'.
+ * container_class - the class that is applied to the container. Defaults to 'menu-{menu slug}-container'.
+ * container_id - The ID that is applied to the container. Defaults to blank.
+ * fallback_cb - If the menu doesn't exists, a callback function will fire. Defaults to 'wp_page_menu'.
+ * before - Text before the link text.
+ * after - Text after the link text.
+ * link_before - Text before the link.
+ * link_after - Text after the link.
+ * echo - Whether to echo the menu or return it. Defaults to echo.
+ * depth - how many levels of the hierarchy are to be included. 0 means all. Defaults to 0.
+ * walker - allows a custom walker to be specified.
+ * theme_location - the location in the theme to be used. Must be registered with register_nav_menu() in order to be selectable by the user.
+ *
+ * @since 3.0.0
+ *
+ * @param array $args Arguments
+ */
+function wp_nav_menu( $args = array() ) {
+ static $menu_id_slugs = array();
+
+ $defaults = array( 'menu' => '', 'container' => 'div', 'container_class' => '', 'container_id' => '', 'menu_class' => 'menu', 'menu_id' => '',
+ 'echo' => true, 'fallback_cb' => 'wp_page_menu', 'before' => '', 'after' => '', 'link_before' => '', 'link_after' => '',
+ 'depth' => 0, 'walker' => '', 'theme_location' => '' );
+
+ $args = wp_parse_args( $args, $defaults );
+ $args = apply_filters( 'wp_nav_menu_args', $args );
+ $args = (object) $args;
+
+ // 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
+ if ( ! $menu && $args->theme_location && ( $locations = get_nav_menu_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 ) {
+ if ( $menu_items = wp_get_nav_menu_items($menu_maybe->term_id) ) {
+ $menu = $menu_maybe;
+ break;
+ }
+ }
+ }
+
+ // If the menu exists, get its items.
+ if ( $menu && ! is_wp_error($menu) && !isset($menu_items) )
+ $menu_items = wp_get_nav_menu_items( $menu->term_id );
+
+ // If no menu was found or if the menu has no items and no location was requested, call the fallback_cb if it exists
+ if ( ( !$menu || is_wp_error($menu) || ( isset($menu_items) && empty($menu_items) && !$args->theme_location ) )
+ && ( function_exists($args->fallback_cb) || is_callable( $args->fallback_cb ) ) )
+ return call_user_func( $args->fallback_cb, (array) $args );
+
+ // If no fallback function was specified and the menu doesn't exists, bail.
+ if ( !$menu || is_wp_error($menu) )
+ return false;
+
+ $nav_menu = $items = '';
+
+ $show_container = false;
+ if ( $args->container ) {
+ $allowed_tags = apply_filters( 'wp_nav_menu_container_allowedtags', array( 'div', 'nav' ) );
+ if ( in_array( $args->container, $allowed_tags ) ) {
+ $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 ) . '"' : '';
+ $nav_menu .= '<'. $args->container . $id . $class . '>';
+ }
+ }
+
+ // Set up the $menu_item variables
+ _wp_menu_item_classes_by_context( $menu_items );
+
+ $sorted_menu_items = array();
+ foreach ( (array) $menu_items as $key => $menu_item )
+ $sorted_menu_items[$menu_item->menu_order] = $menu_item;
+
+ unset($menu_items);
+
+ $items .= walk_nav_menu_tree( $sorted_menu_items, $args->depth, $args );
+ unset($sorted_menu_items);
+
+ // Attributes
+ if ( ! empty( $args->menu_id ) ) {
+ $slug = $args->menu_id;
+ } else {
+ $slug = 'menu-' . $menu->slug;
+ while ( in_array( $slug, $menu_id_slugs ) ) {
+ if ( preg_match( '#-(\d+)$#', $slug, $matches ) )
+ $slug = preg_replace('#-(\d+)$#', '-' . ++$matches[1], $slug);
+ else
+ $slug = $slug . '-1';
+ }
+ }
+ $menu_id_slugs[] = $slug;
+ $attributes = ' id="' . $slug . '"';
+ $attributes .= $args->menu_class ? ' class="'. $args->menu_class .'"' : '';
+
+ $nav_menu .= '<ul'. $attributes .'>';
+
+ // Allow plugins to hook into the menu to add their own <li>'s
+ $items = apply_filters( 'wp_nav_menu_items', $items, $args );
+ $items = apply_filters( "wp_nav_menu_{$menu->slug}_items", $items, $args );
+ $nav_menu .= $items;
+ unset($items);
+
+ $nav_menu .= '</ul>';
+
+ if ( $show_container )
+ $nav_menu .= '</' . $args->container . '>';
+
+ $nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args );
+
+ if ( $args->echo )
+ echo $nav_menu;
+ else
+ return $nav_menu;
+}
+
+/**
+ * Add the class property classes for the current context, if applicable.
+ *
+ * @access private
+ * @since 3.0
+ *
+ * @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;
+
+ $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->post_type ) && is_post_type_hierarchical( $queried_object->post_type ) ) {
+ _get_post_ancestors( $queried_object );
+ } 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 );
+
+ foreach ( (array) $menu_items as $key => $menu_item ) {
+ $classes = (array) $menu_item->classes;
+ $classes[] = 'menu-item';
+ $classes[] = 'menu-item-type-' . $menu_item->type;
+
+ // 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( $menu_item->object_id, $possible_object_parents ) ) {
+ $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 ) )
+ )
+ ) {
+ $classes[] = 'current-menu-item';
+ $_anc_id = (int) $menu_item->db_id;
+
+ while(
+ ( $_anc_id = get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) ) &&
+ ! in_array( $_anc_id, $active_ancestor_item_ids )
+ ) {
+ $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-requested URL
+ } elseif ( 'custom' == $menu_item->object ) {
+ $current_url = ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
+ $item_url = strpos( $menu_item->url, '#' ) ? substr( $menu_item->url, 0, strpos( $menu_item->url, '#' ) ) : $menu_item->url;
+ if ( $item_url == $current_url ) {
+ $classes[] = 'current-menu-item';
+ $_anc_id = (int) $menu_item->db_id;
+
+ while(
+ ( $_anc_id = get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) ) &&
+ ! in_array( $_anc_id, $active_ancestor_item_ids )
+ ) {
+ $active_ancestor_item_ids[] = $_anc_id;
+ }
+
+ if ( untrailingslashit($current_url) == home_url() ) {
+ $classes[] = 'menu-item-home';
+ // Back compat for home limk 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;
+ }
+ }
+
+ // 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;
+
+ 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( $parent_item->object_id, $queried_object->ancestors )
+ ) ||
+
+ // ancestral term
+ (
+ 'taxonomy' == $parent_item->type &&
+ isset( $possible_taxonomy_ancestors[ $parent_item->object ] ) &&
+ in_array( $parent_item->object_id, $possible_taxonomy_ancestors[ $parent_item->object ] )
+ )
+ )
+ ) {
+ $classes[] = empty( $queried_object->taxonomy ) ? 'current-' . $queried_object->post_type . '-ancestor' : 'current-' . $queried_object->taxonomy . '-ancestor';
+ }
+
+ if ( in_array( intval( $parent_item->db_id ), $active_ancestor_item_ids ) ) {
+ $classes[] = 'current-menu-ancestor';
+ }
+ if ( in_array( $parent_item->db_id, $active_parent_item_ids ) )
+ $classes[] = 'current-menu-parent';
+ if ( in_array( $parent_item->object_id, $active_parent_object_ids ) )
+ $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) )
+ $classes[] = 'current_page_parent';
+ if ( in_array('current-menu-ancestor', $classes) )
+ $classes[] = 'current_page_ancestor';
+ }
+
+ $menu_items[$key]->classes = array_unique( $classes );
+ }
+}
+
+/**
+ * Retrieve the HTML list content for nav menu items.
+ *
+ * @uses Walker_Nav_Menu to create HTML list content.
+ * @since 2.1.0
+ * @see Walker::walk() for parameters and return description.
+ */
+function walk_nav_menu_tree( $items, $depth, $r ) {
+ $walker = ( empty($r->walker) ) ? new Walker_Nav_Menu : $r->walker;
+ $args = array( $items, $depth, $r );
+
+ return call_user_func_array( array(&$walker, 'walk'), $args );
+}
+
+?>