Created
July 1, 2015 04:06
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Roots/Sage BEM nav walker
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<?php | |
namespace Roots\Soil\Nav; | |
use Roots\Soil\Utils; | |
/** | |
* Cleaner walker for wp_nav_menu() | |
* | |
* Walker_Nav_Menu (WordPress default) example output: | |
* <li id="menu-item-8" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-8"><a href="/">Home</a></li> | |
* <li id="menu-item-9" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-9"><a href="/sample-page/">Sample Page</a></l | |
* | |
* NavWalker example output: | |
* <li class="menu-home"><a href="/">Home</a></li> | |
* <li class="menu-sample-page"><a href="/sample-page/">Sample Page</a></li> | |
* | |
* You can enable/disable this feature in functions.php (or lib/config.php if you're using Sage): | |
* add_theme_support('soil-nav-walker'); | |
*/ | |
class NavWalker extends \Walker_Nav_Menu { | |
private $cpt; // Boolean, is current post a custom post type | |
private $archive; // Stores the archive page for current URL | |
public function __construct() { | |
add_filter('nav_menu_css_class', array($this, 'cssClasses'), 10, 2); | |
add_filter('nav_menu_item_id', '__return_null'); | |
$cpt = get_post_type(); | |
$this->cpt = in_array($cpt, get_post_types(array('_builtin' => false))); | |
$this->archive = get_post_type_archive_link($cpt); | |
} | |
public function checkCurrent($classes) { | |
return preg_match('/(current[-_])|active/', $classes); | |
} | |
// @codingStandardsIgnoreStart | |
public function display_element($element, &$children_elements, $max_depth, $depth = 0, $args, &$output) { | |
$element->is_subitem = ((!empty($children_elements[$element->ID]) && (($depth + 1) < $max_depth || ($max_depth === 0)))); | |
if ($element->is_subitem) { | |
$element->classes[] = 'dropdown'; | |
foreach ($children_elements[$element->ID] as $child) { | |
if ($child->current_item_parent || Utils\url_compare($this->archive, $child->url)) { | |
$element->classes[] = 'active'; | |
} | |
} | |
} | |
$element->is_active = strpos($this->archive, $element->url); | |
if ($element->is_active) { | |
$element->classes[] = 'active'; | |
} | |
if ($depth === 0) { | |
$element->classes[] = 'nav__item'; | |
} else { | |
$element->classes[] = 'nav__sub-item'; | |
} | |
parent::display_element($element, $children_elements, $max_depth, $depth, $args, $output); | |
} | |
// @codingStandardsIgnoreEnd | |
public function cssClasses($classes, $item) { | |
$slug = sanitize_title($item->title); | |
if ($this->cpt) { | |
$classes = str_replace('current_page_parent', '', $classes); | |
if (Utils\url_compare($this->archive, $item->url)) { | |
$classes[] = 'active'; | |
} | |
} | |
$classes = preg_replace('/(current(-menu-|[-_]page[-_])(item|parent|ancestor))/', 'active', $classes); | |
$classes = preg_replace('/^((menu|page)[-_\w+]+)+/', '', $classes); | |
$classes[] = 'nav__item--' . $slug; | |
$classes = array_unique($classes); | |
return array_filter($classes, 'Roots\\Soil\\Utils\\is_element_empty'); | |
} | |
} | |
/** | |
* Clean up wp_nav_menu_args | |
* | |
* Remove the container | |
* Remove the id="" on nav menu items | |
*/ | |
function nav_menu_args($args = '') { | |
$nav_menu_args = []; | |
$nav_menu_args['container'] = false; | |
if (!$args['items_wrap']) { | |
$nav_menu_args['items_wrap'] = '<ul class="%2$s">%3$s</ul>'; | |
} | |
if (!$args['walker']) { | |
$nav_menu_args['walker'] = new NavWalker(); | |
} | |
return array_merge($args, $nav_menu_args); | |
} | |
add_filter('wp_nav_menu_args', __NAMESPACE__ . '\\nav_menu_args'); | |
add_filter('nav_menu_item_id', '__return_null'); |
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