'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\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 ) : '';
$classes = $value = '';
$classes = array( 'menu-item', 'menu-item-type-'. $item->type, $item->classes, 'menu-item-object-'. $item->object );
$classes = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) );
$classes = ' class="' . esc_attr( $classes ) . '"';
$output .= $indent . '\n";
}
}
/**
* Create HTML list of nav menu input items.
*
* @package WordPress
* @since 3.0.0
* @uses Walker_Nav_Menu
*/
class Walker_Nav_Menu_Checklist extends Walker_Nav_Menu {
/**
* @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 $_nav_menu_placeholder;
$_nav_menu_placeholder = ( 0 > $_nav_menu_placeholder ) ? intval($_nav_menu_placeholder) - 1 : -1;
$possible_object_id = isset( $item->post_type ) && 'nav_menu_item' == $item->post_type ? $item->object_id : $_nav_menu_placeholder;
$possible_db_id = ( ! empty( $item->ID ) ) && ( 0 < $possible_object_id ) ? (int) $item->ID : 0;
$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
$output .= $indent . '';
$output .= '';
// Menu item hidden fields
$output .= '';
$output .= '';
$output .= '';
$output .= '';
$output .= '';
$output .= '';
$output .= '';
$output .= '';
$output .= '';
$output .= '';
$output .= '';
}
}
/**
* 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 container of the menu list. Defaults to 'menu'.
* container - Whether to wrap the ul, and what to wrap it with. Defaults to 'div'.
* conatiner_class - the class 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.
* context - the context the menu is used in.
* 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() ) {
$defaults = array( 'menu' => '', 'container' => 'div', 'container_class' => '', 'menu_class' => 'menu', 'echo' => true,
'fallback_cb' => 'wp_page_menu', 'before' => '', 'after' => '', 'link_before' => '', 'link_after' => '',
'depth' => 0, 'walker' => '', 'context' => 'frontend', '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( $menu->term_id );
// If no menu was found or if the menu has no items, call the fallback_cb
if ( !$menu || is_wp_error($menu) || ( isset($menu_items) && empty($menu_items) ) ) {
if ( 'frontend' == $args->context && ( function_exists($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 = '';
$container_allowedtags = apply_filters( 'wp_nav_menu_container_allowedtags', array( 'div', 'nav' ) );
if ( in_array( $args->container, $container_allowedtags ) ) {
$class = $args->container_class ? ' class="' . esc_attr($args->container_class) . '"' : ' class="menu-'. $menu->slug .'-container"';
$nav_menu .= '<'. $args->container . $class .'>';
}
// Set up the $menu_item variables
if ( 'frontend' == $args->context )
_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
$attributes = ' id="menu-' . $menu->slug . '"';
$attributes .= $args->menu_class ? ' class="'. $args->menu_class .'"' : '';
$nav_menu .= '';
// Allow plugins to hook into the menu to add their own '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 .= '';
if ( in_array( $args->container, $container_allowedtags ) )
$nav_menu .= '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 frontend 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 = array() ) {
global $wp_query;
$queried_object = $wp_query->get_queried_object();
$queried_object_id = (int) $wp_query->queried_object_id;
$active_object = '';
$active_parent_item_ids = array();
$active_parent_object_ids = array();
$possible_object_parents = array();
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 ) ) {
$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 );
}
}
}
$possible_object_parents = array_filter( $possible_object_parents );
foreach( (array) $menu_items as $key => $menu_item ) {
// 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 &&
(
( '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 ) )
)
) {
$menu_items[$key]->classes = trim( $menu_item->classes . ' ' . 'current-menu-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 ) {
$menu_items[$key]->classes = trim( $menu_item->classes . ' ' . 'current-menu-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;
}
}
}
$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
if ( ! empty( $active_parent_item_ids ) || ! empty( $active_parent_object_ids ) ) {
foreach( (array) $menu_items as $key => $parent_item ) {
if ( in_array( $parent_item->db_id, $active_parent_item_ids ) )
$menu_items[$key]->classes = trim( $parent_item->classes . ' ' . 'current-menu-parent' );
if ( in_array( $parent_item->object_id, $active_parent_object_ids ) )
$menu_items[$key]->classes = trim( $parent_item->classes . ' ' . 'current-' . $active_object . '-parent' );
}
}
}
/**
* 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 );
}
?>