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<?php
/**
* Created by PhpStorm.
* User: tagdiv
* Date: 04.11.2015
* Time: 10:25
*/
class td_walker_mobile_menu extends Walker_Nav_Menu {
// The existing menu items are saved here.
private static $td_menus = array();
/**
* Helper function used internally by the start_el to check if an item of a menu has children.
* The requested menu id is cached into $td_menus.
*
* @param $menu_id - The menu id.
* @param $item_id - The item id.
*
* @return bool
*/
private function td_has_children($menu_id, $item_id) {
// Check if the items of the requested menu are already saved.
// If they are not, then try to get them.
if (!array_key_exists($menu_id, self::$td_menus)) {
$menu_items = wp_get_nav_menu_items($menu_id);
// Do not set, if they are not available.
if (isset($menu_items)) {
self::$td_menus[$menu_id] = $menu_items;
}
}
// Check again and if the key for the requested menu is set, it means that their items are available.
if (array_key_exists($menu_id, self::$td_menus)) {
foreach (self::$td_menus[$menu_id] as $menu_item) {
if (intval($menu_item->menu_item_parent) === $item_id) {
return true;
}
}
}
return false;
}
public function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
$classes = empty( $item->classes ) ? array() : (array) $item->classes;
$classes[] = 'menu-item-' . $item->ID;
/**
* Filter the CSS class(es) applied to a menu item's list item element.
*
* @since 3.0.0
* @since 4.1.0 The `$depth` parameter was added.
*
* @param array $classes The CSS classes that are applied to the menu item's `<li>` element.
* @param object $item The current menu item.
* @param array $args An array of {@see wp_nav_menu()} arguments.
* @param int $depth Depth of menu item. Used for padding.
*/
$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args, $depth ) );
$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';
/**
* Filter the ID applied to a menu item's list item element.
*
* @since 3.0.1
* @since 4.1.0 The `$depth` parameter was added.
*
* @param string $menu_id The ID that is applied to the menu item's `<li>` element.
* @param object $item The current menu item.
* @param array $args An array of {@see wp_nav_menu()} arguments.
* @param int $depth Depth of menu item. Used for padding.
*/
$id = apply_filters( 'nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args, $depth );
$id = $id ? ' id="' . esc_attr( $id ) . '"' : '';
$output .= $indent . '<li' . $id . $class_names .'>';
$atts = array();
$atts['title'] = ! empty( $item->attr_title ) ? $item->attr_title : '';
$atts['target'] = ! empty( $item->target ) ? $item->target : '';
$atts['rel'] = ! empty( $item->xfn ) ? $item->xfn : '';
$atts['href'] = ! empty( $item->url ) ? $item->url : '';
/**
* Filter the HTML attributes applied to a menu item's anchor element.
*
* @since 3.6.0
* @since 4.1.0 The `$depth` parameter was added.
*
* @param array $atts {
* The HTML attributes applied to the menu item's `<a>` element, empty strings are ignored.
*
* @type string $title Title attribute.
* @type string $target Target attribute.
* @type string $rel The rel attribute.
* @type string $href The href attribute.
* }
* @param object $item The current menu item.
* @param array $args An array of {@see wp_nav_menu()} arguments.
* @param int $depth Depth of menu item. Used for padding.
*/
$atts = apply_filters( 'nav_menu_link_attributes', $atts, $item, $args, $depth );
$attributes = '';
foreach ( $atts as $attr => $value ) {
if ( ! empty( $value ) ) {
$value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
$attributes .= ' ' . $attr . '="' . $value . '"';
}
}
$item_output = $args->before;
$item_output .= '<a'. $attributes .'>';
/** This filter is documented in wp-includes/post-template.php */
$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID );
$menu_id = $args->menu;
if (is_object($args->menu)) {
$menu_id = $args->menu->term_id;
}
// TAGDIV: The $link_after of args is added for parent items
if (($this->td_has_children($menu_id, $item->ID) === true) ||
// Important! This check was introduce because of WPML plugin (the plugin could not render properly the switcher language on mobile)
(strpos( $item->ID, 'wpml') === 0 && in_array('menu-item-has-children', $item->classes))) {
$item_output .= $args->link_after;
}
$item_output .= '</a>';
$item_output .= $args->after;
/**
* Filter a menu item's starting output.
*
* The menu item's starting output only includes `$args->before`, the opening `<a>`,
* the menu item's title, the closing `</a>`, and `$args->after`. Currently, there is
* no filter for modifying the opening and closing `<li>` for a menu item.
*
* @since 3.0.0
*
* @param string $item_output The menu item's starting HTML output.
* @param object $item Menu item data object.
* @param int $depth Depth of menu item. Used for padding.
* @param array $args An array of {@see wp_nav_menu()} arguments.
*/
$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
}
}