WordPress/wp-includes/nav-menu.php

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<?php
/**
* Navigation Menu functions
*
* @package WordPress
* @subpackage Nav_Menus
* @since 3.0.0
*/
/**
* Returns a navigation menu object.
*
* @since 3.0.0
*
* @param string $menu Menu id
* @return mixed $menu|false Or WP_Error
*/
function wp_get_nav_menu_object( $menu ) {
return is_nav_menu( $menu );
}
/**
* Check if navigation menu exists.
*
* Returns the menu object, or false if the term doesn't exist.
*
* @since 3.0.0
*
* @param int|string $menu The menu to check
* @return mixed Menu Object, if it exists. Else, false or WP_Error
*/
function is_nav_menu( $menu ) {
if ( !$menu )
return false;
$menu_obj = get_term( $menu, 'nav_menu' );
if ( !$menu_obj )
$menu_obj = get_term_by( 'slug', $menu, 'nav_menu' );
if ( !$menu_obj )
$menu_obj = get_term_by( 'name', $menu, 'nav_menu' );
if ( !$menu_obj ) {
$menu_obj = false;
}
return $menu_obj;
}
/**
* Create a Navigation Menu.
*
* Optional args:
* slug - the url friendly version of the nav menu.
*
* @since 3.0.0
*
* @param string $menu_name Menu Name
* @param string $args Optional.
* @return mixed Menu object on sucess|WP_Error on failure
*/
function wp_create_nav_menu( $menu_name, $args = array() ) {
$menu_exists = get_term_by( 'name', $menu_name, 'nav_menu' );
if ( $menu_exists )
return new WP_Error( 'menu_exists', sprintf( __('A menu named <strong>%s</strong> already exists; please try another name.'), esc_html( $menu_exists->name ) ) );
if ( isset($args['slug']) )
$slug = $args['slug'];
else
$slug = $menu_name;
$menu = wp_insert_term( $menu_name, 'nav_menu', array('slug' => $slug) );
if ( is_wp_error($menu) )
return $menu;
$result = get_term( $menu['term_id'], 'nav_menu' );
if ( $result && !is_wp_error($result) ) {
do_action( 'wp_create_nav_menu', $menu['term_id'] );
return $result;
} else {
return $result;
}
}
/**
* Delete a Navigation Menu.
*
* @since 3.0.0
*
* @param string $menu name|id|slug
* @return mixed Menu object on sucess|WP_Error on failure
*/
function wp_delete_nav_menu( $menu ) {
$menu = wp_get_nav_menu_object( $menu );
if ( !$menu )
return false;
$menu_objects = get_objects_in_term( $menu->term_id, 'nav_menu' );
if ( !empty( $menu_objects ) ) {
foreach ( $menu_objects as $item ) {
wp_delete_post( $item );
}
}
$result = wp_delete_term( $menu->term_id, 'nav_menu' );
if ( $result && !is_wp_error($result) ) {
do_action( 'wp_delete_nav_menu', $menu->term_id );
return $result;
} else {
return $result;
}
}
/**
* Returns all navigation menu objects.
*
* @since 3.0.0
*
* @return array menu objects
*/
function wp_get_nav_menus() {
return get_terms( 'nav_menu', array( 'hide_empty' => false, 'orderby' => 'id' ) );
}
/**
* Returns all menu items of a navigation menu.
*
* @since 3.0.0
*
* @param string $menu menu name, id, or slug
* @param string $args
* @return mixed $items array of menu items, else false.
*/
function wp_get_nav_menu_items( $menu, $args = array() ) {
$menu = wp_get_nav_menu_object( $menu );
if ( !$menu )
return false;
$items = get_objects_in_term( $menu->term_id, 'nav_menu' );
if ( ! empty( $items ) ) {
$defaults = array( 'orderby' => 'menu_order', 'post_type' => 'nav_menu_item', 'post_status' => 'publish', 'output' => ARRAY_A, 'output_key' => 'menu_order' );
$args = wp_parse_args( $args, $defaults );
if ( count( $items ) > 1 )
$args['include'] = implode( ',', $items );
else
$args['include'] = $items[0];
$items = get_posts( $args );
if ( ARRAY_A == $args['output'] ) {
$output = array();
foreach ( $items as $item ) {
$output[$item->$args['output_key']] = $item;
}
unset( $items );
ksort( $output );
return $output;
}
}
return $items;
}
/**
* 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);
}
/**
* Adds all the navigation menu properties to the menu item.
*
* @since 3.0.0
*
* @param string $menu_item The menu item to modify
* @param string $menu_item_type The menu item type (frontend, custom, post_type, taxonomy).
* @param string $menu_item_object Optional. The menu item object type (post type or taxonomy).
* @return object $menu_item The modified menu item.
*/
function wp_setup_nav_menu_item( $menu_item, $menu_item_type = null, $menu_item_object = '' ) {
switch ( $menu_item_type ) {
case 'frontend':
$menu_item->db_id = (int) $menu_item->ID;
$menu_item->object_id = get_post_meta( $menu_item->ID, '_menu_item_object_id', true );
$menu_item->object = get_post_meta( $menu_item->ID, '_menu_item_object', true );
$menu_item->type = get_post_meta( $menu_item->ID, '_menu_item_type', true );
if ( 'post_type' == $menu_item->type ) {
$object = get_post_type_object( $menu_item->object );
$menu_item->append = $object->singular_label;
} elseif ( 'taxonomy' == $menu_item->type ) {
$object = get_taxonomy( $menu_item->object );
$menu_item->append = $object->singular_label;
} else {
$menu_item->append = __('Custom');
}
$menu_item->title = $menu_item->post_title;
$menu_item->url = get_post_meta( $menu_item->ID, '_menu_item_url', true );
$menu_item->target = get_post_meta( $menu_item->ID, '_menu_item_target', true );
$menu_item->attr_title = strip_tags( $menu_item->post_excerpt );
$menu_item->description = strip_tags( $menu_item->post_content );
$menu_item->classes = get_post_meta( $menu_item->ID, '_menu_item_classes', true );
$menu_item->xfn = get_post_meta( $menu_item->ID, '_menu_item_xfn', true );
break;
case 'custom':
$menu_item->db_id = 0;
$menu_item->object_id = (int) $menu_item->ID;
$menu_item->object = 'custom';
$menu_item->type = 'custom';
$menu_item->append = __('custom');
$menu_item->attr_title = strip_tags( $menu_item->post_excerpt );
$menu_item->description = strip_tags( $menu_item->post_content );
$menu_item->title = $menu_item->post_title;
$menu_item->url = get_post_meta( $menu_item->ID, '_menu_item_url', true );
$menu_item->target = get_post_meta( $menu_item->ID, '_menu_item_target', true );
$menu_item->classes = '';
$menu_item->xfn = '';
break;
case 'post_type':
$menu_item->db_id = 0;
$menu_item->object_id = (int) $menu_item->ID;
$menu_item->type = $menu_item_type;
$object = get_post_type_object( $menu_item_object );
$menu_item->object = $object->name;
$menu_item->append = strtolower( $object->singular_label );
$menu_item->title = $menu_item->post_title;
$menu_item->url = get_permalink( $menu_item->ID );
$menu_item->target = '_self';
$menu_item->attr_title = '';
$menu_item->description = strip_tags( $menu_item->post_content );
$menu_item->classes = '';
$menu_item->xfn = '';
break;
case 'taxonomy':
$menu_item->ID = $menu_item->term_id;
$menu_item->db_id = 0;
$menu_item->object_id = (int) $menu_item->term_id;
$menu_item->post_parent = (int) $menu_item->parent;
$menu_item->type = $menu_item_type;
$object = get_taxonomy( $menu_item_object );
$menu_item->object = $object->name;
$menu_item->append = strtolower( $object->singular_label );
$menu_item->title = $menu_item->name;
$menu_item->url = get_term_link( $menu_item, $menu_item_object );
$menu_item->target = '_self';
$menu_item->attr_title = '';
$menu_item->description = strip_tags( $menu_item->description );
$menu_item->classes = '';
$menu_item->xfn = '';
break;
}
return $menu_item;
}
?>