/**
* 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 'nxt_page_menu'. Set to false for no fallback.
* 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.
* items_wrap - How the list items should be wrapped. Defaults to a ul with an id and class. Uses printf() format with numbered placeholders.
*
* @since 3.0.0
*
* @param array $args Arguments
*/
function nxt_nav_menu($args = array())
{
static $menu_id_slugs = array();
$defaults = array('menu' => '', 'container' => 'div', 'container_class' => '', 'container_id' => '', 'menu_class' => 'menu', 'menu_id' => '', 'echo' => true, 'fallback_cb' => 'nxt_page_menu', 'before' => '', 'after' => '', 'link_before' => '', 'link_after' => '', 'items_wrap' => '<ul id="%1$s" class="%2$s">%3$s</ul>', 'depth' => 0, 'walker' => '', 'theme_location' => '');
$args = nxt_parse_args($args, $defaults);
$args = apply_filters('nxt_nav_menu_args', $args);
$args = (object) $args;
// Get the nav menu based on the requested menu
$menu = nxt_get_nav_menu_object($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])) {
$menu = nxt_get_nav_menu_object($locations[$args->theme_location]);
}
// get the first menu that has items if we still can't find a menu
if (!$menu && !$args->theme_location) {
$menus = nxt_get_nav_menus();
foreach ($menus as $menu_maybe) {
if ($menu_items = nxt_get_nav_menu_items($menu_maybe->term_id)) {
$menu = $menu_maybe;
break;
}
}
}
// If the menu exists, get its items.
if ($menu && !is_nxt_error($menu) && !isset($menu_items)) {
$menu_items = nxt_get_nav_menu_items($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 ((!$menu || is_nxt_error($menu) || isset($menu_items) && empty($menu_items) && !$args->theme_location) && $args->fallback_cb && is_callable($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_nxt_error($menu)) {
return false;
}
$nav_menu = $items = '';
$show_container = false;
if ($args->container) {
$allowed_tags = apply_filters('nxt_nav_menu_container_allowedtags', array('div', 'nav'));
if (in_array($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 $menu_item variables
_nxt_menu_item_classes_by_context($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);
$sorted_menu_items = apply_filters('nxt_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, $menu_id_slugs)) {
if (preg_match('#-(\\d+)$#', $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 : '';
// Allow plugins to hook into the menu to add their own <li>'s
$items = apply_filters('nxt_nav_menu_items', $items, $args);
$items = apply_filters("nxt_nav_menu_{$menu->slug}_items", $items, $args);
$nav_menu .= sprintf($args->items_wrap, esc_attr($wrap_id), esc_attr($wrap_class), $items);
unset($items);
if ($show_container) {
$nav_menu .= '</' . $args->container . '>';
}
$nav_menu = apply_filters('nxt_nav_menu', $nav_menu, $args);
if ($args->echo) {
echo $nav_menu;
} else {
return $nav_menu;
}
}
function widget($args, $instance)
{
// Get menu
$nav_menu = !empty($instance['nav_menu']) ? nxt_get_nav_menu_object($instance['nav_menu']) : false;
if (!$nav_menu) {
return;
}
$instance['title'] = apply_filters('widget_title', empty($instance['title']) ? '' : $instance['title'], $instance, $this->id_base);
echo $args['before_widget'];
if (!empty($instance['title'])) {
echo $args['before_title'] . $instance['title'] . $args['after_title'];
}
nxt_nav_menu(array('fallback_cb' => '', 'menu' => $nav_menu));
echo $args['after_widget'];
}
/**
* 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 $items array of menu items, else false.
*/
function nxt_get_nav_menu_items($menu, $args = array())
{
global $_nxt_using_ext_object_cache;
$menu = nxt_get_nav_menu_object($menu);
if (!$menu) {
return false;
}
static $fetched = array();
$items = get_objects_in_term($menu->term_id, 'nav_menu');
if (empty($items)) {
return $items;
}
$defaults = array('order' => 'ASC', 'orderby' => 'menu_order', 'post_type' => 'nav_menu_item', 'post_status' => 'publish', 'output' => ARRAY_A, 'output_key' => 'menu_order', 'nopaging' => true, 'update_post_term_cache' => false);
$args = nxt_parse_args($args, $defaults);
if (count($items) > 1) {
$args['include'] = implode(',', $items);
} else {
$args['include'] = $items[0];
}
$items = get_posts($args);
if (is_nxt_error($items) || !is_array($items)) {
return false;
}
// Get all posts and terms at once to prime the caches
if (empty($fetched[$menu->term_id]) || $_nxt_using_ext_object_cache) {
$fetched[$menu->term_id] = true;
$posts = array();
$terms = array();
foreach ($items as $item) {
$object_id = get_post_meta($item->ID, '_menu_item_object_id', true);
$object = get_post_meta($item->ID, '_menu_item_object', true);
$type = get_post_meta($item->ID, '_menu_item_type', true);
if ('post_type' == $type) {
$posts[$object][] = $object_id;
} elseif ('taxonomy' == $type) {
$terms[$object][] = $object_id;
}
}
if (!empty($posts)) {
foreach (array_keys($posts) as $post_type) {
get_posts(array('post__in' => $posts[$post_type], 'post_type' => $post_type, 'nopaging' => true, 'update_post_term_cache' => false));
}
}
unset($posts);
if (!empty($terms)) {
foreach (array_keys($terms) as $taxonomy) {
get_terms($taxonomy, array('include' => $terms[$taxonomy]));
}
}
unset($terms);
}
$items = array_map('nxt_setup_nav_menu_item', $items);
if (!is_admin()) {
// Remove invalid items only in frontend
$items = array_filter($items, '_is_valid_nav_menu_item');
}
if (ARRAY_A == $args['output']) {
$GLOBALS['_menu_item_sort_prop'] = $args['output_key'];
usort($items, '_sort_nav_menu_items');
$i = 1;
foreach ($items as $k => $item) {
$items[$k]->{$args}['output_key'] = $i++;
}
}
return apply_filters('nxt_get_nav_menu_items', $items, $menu, $args);
}
if (!$recently_edited && is_nav_menu($nav_menu_selected_id)) {
$recently_edited = $nav_menu_selected_id;
// Else if $nav_menu_selected_id is not a menu and not requesting that we create a new menu, but $recently_edited is a menu, grab that one.
} elseif (0 == $nav_menu_selected_id && !isset($_REQUEST['menu']) && is_nav_menu($recently_edited)) {
$nav_menu_selected_id = $recently_edited;
// Else try to grab the first menu from the menus list
} elseif (0 == $nav_menu_selected_id && !isset($_REQUEST['menu']) && !empty($nav_menus)) {
$nav_menu_selected_id = $nav_menus[0]->term_id;
}
// Update the user's setting
if ($nav_menu_selected_id != $recently_edited && is_nav_menu($nav_menu_selected_id)) {
update_user_meta($current_user->ID, 'nav_menu_recently_edited', $nav_menu_selected_id);
}
// If there's a menu, get its name.
if (!$nav_menu_selected_title && is_nav_menu($nav_menu_selected_id)) {
$_menu_object = nxt_get_nav_menu_object($nav_menu_selected_id);
$nav_menu_selected_title = !is_nxt_error($_menu_object) ? $_menu_object->name : '';
}
// Generate truncated menu names
foreach ((array) $nav_menus as $key => $_nav_menu) {
$_nav_menu->truncated_name = trim(nxt_html_excerpt($_nav_menu->name, 40));
if ($_nav_menu->truncated_name != $_nav_menu->name) {
$_nav_menu->truncated_name .= '…';
}
$nav_menus[$key]->truncated_name = $_nav_menu->truncated_name;
}
// Ensure the user will be able to scroll horizontally
// by adding a class for the max menu depth.
global $_nxt_nav_menu_max_depth;
$_nxt_nav_menu_max_depth = 0;
// Calling nxt_get_nav_menu_to_edit generates $_nxt_nav_menu_max_depth
/**
* Returns the menu formatted to edit.
*
* @since 3.0.0
*
* @param string $menu_id The ID of the menu to format.
* @return string|nxt_Error $output The menu formatted to edit or error object on failure.
*/
function nxt_get_nav_menu_to_edit($menu_id = 0)
{
$menu = nxt_get_nav_menu_object($menu_id);
// If the menu exists, get its items.
if (is_nav_menu($menu)) {
$menu_items = nxt_get_nav_menu_items($menu->term_id, array('post_status' => 'any'));
$result = '<div id="menu-instructions" class="post-body-plain';
$result .= !empty($menu_items) ? ' menu-instructions-inactive">' : '">';
$result .= '<p>' . __('Select menu items (pages, categories, links) from the boxes at left to begin building your custom menu.') . '</p>';
$result .= '</div>';
if (empty($menu_items)) {
return $result . ' <ul class="menu" id="menu-to-edit"> </ul>';
}
$walker_class_name = apply_filters('nxt_edit_nav_menu_walker', 'Walker_Nav_Menu_Edit', $menu_id);
if (class_exists($walker_class_name)) {
$walker = new $walker_class_name();
} else {
return new nxt_Error('menu_walker_not_exist', sprintf(__('The Walker class named <strong>%s</strong> does not exist.'), $walker_class_name));
}
$some_pending_menu_items = $some_invalid_menu_items = false;
foreach ((array) $menu_items as $menu_item) {
if (isset($menu_item->post_status) && 'draft' == $menu_item->post_status) {
$some_pending_menu_items = true;
}
if (!empty($menu_item->_invalid)) {
$some_invalid_menu_items = true;
}
}
if ($some_pending_menu_items) {
$result .= '<div class="updated inline"><p>' . __('Click Save Menu to make pending menu items public.') . '</p></div>';
}
if ($some_invalid_menu_items) {
$result .= '<div class="error inline"><p>' . __('There are some invalid menu items. Please check or delete them.') . '</p></div>';
}
$result .= '<ul class="menu" id="menu-to-edit"> ';
$result .= walk_nav_menu_tree(array_map('nxt_setup_nav_menu_item', $menu_items), 0, (object) array('walker' => $walker));
$result .= ' </ul> ';
return $result;
} elseif (is_nxt_error($menu)) {
return $menu;
}
}
