Viewing file:  frontend-nav-menu.php (9.42 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
<?php
/**
* Manages custom menus translations as well as the language switcher menu item on frontend
*
* @since 1.2
*/
class PLL_Frontend_Nav_Menu extends PLL_Nav_Menu {
public $curlang;
/**
* Constructor
*
* @since 1.2
*/
public function __construct( &$polylang ) {
parent::__construct( $polylang );
$this->curlang = &$polylang->curlang;
// Split the language switcher menu item in several language menu items
add_filter( 'wp_get_nav_menu_items', array( $this, 'wp_get_nav_menu_items' ), 20 ); // after the customizer menus
add_filter( 'wp_nav_menu_objects', array( $this, 'wp_nav_menu_objects' ) );
add_filter( 'nav_menu_link_attributes', array( $this, 'nav_menu_link_attributes' ), 10, 3 );
// Filters menus by language
add_filter( 'theme_mod_nav_menu_locations', array( $this, 'nav_menu_locations' ), 20 );
add_filter( 'wp_nav_menu_args', array( $this, 'wp_nav_menu_args' ) );
// The customizer
if ( isset( $_POST['wp_customize'], $_POST['customized'] ) ) {
add_filter( 'wp_nav_menu_args', array( $this, 'filter_args_before_customizer' ) );
add_filter( 'wp_nav_menu_args', array( $this, 'filter_args_after_customizer' ), 2000 );
}
}
/**
* Sort menu items by menu order
*
* @since 1.7.9
*
* @param object $a The first object to compare
* @param object $b The second object to compare
* @return int -1 or 1 if $a is considered to be respectively less than or greater than $b.
*/
protected function usort_menu_items( $a, $b ) {
return ( $a->menu_order < $b->menu_order ) ? -1 : 1;
}
/**
* Splits the one item of backend in several items on frontend
* take care to menu_order as it is used later in wp_nav_menu
*
* @since 1.1.1
*
* @param array $items menu items
* @return array modified items
*/
public function wp_get_nav_menu_items( $items ) {
if ( doing_action( 'customize_register' ) ) { // needed since WP 4.3, doing_action available since WP 3.9
return $items;
}
// The customizer menus does not sort the items and we need them to be sorted before splitting the language switcher
usort( $items, array( $this, 'usort_menu_items' ) );
$new_items = array();
$offset = 0;
foreach ( $items as $key => $item ) {
if ( $options = get_post_meta( $item->ID, '_pll_menu_item', true ) ) {
$i = 0;
$switcher = new PLL_Switcher;
$args = array_merge( array( 'raw' => 1 ), $options );
$the_languages = $switcher->the_languages( PLL()->links, $args );
// parent item for dropdown
if ( ! empty( $options['dropdown'] ) ) {
$item->title = $options['show_flags'] && $options['show_names'] ? $this->curlang->flag . ' ' . esc_html( $this->curlang->name ) : ( $options['show_flags'] ? $this->curlang->flag : esc_html( $this->curlang->name ) );
$item->url = '';
$item->classes = array( 'pll-parent-menu-item' );
$new_items[] = $item;
$offset++;
}
foreach ( $the_languages as $lang ) {
$lang_item = clone $item;
$lang_item->ID = $lang_item->ID . '-' . $lang['slug']; // A unique ID
$lang_item->title = $options['show_flags'] && $options['show_names'] ? $lang['flag'] . '<span style="margin-left:0.3em;">' . esc_html( $lang['name'] ) . '</span>' : ( $options['show_flags'] ? $lang['flag'] : esc_html( $lang['name'] ) );
$lang_item->url = $lang['url'];
$lang_item->lang = $lang['locale']; // Save this for use in nav_menu_link_attributes
$lang_item->classes = $lang['classes'];
$lang_item->menu_order += $offset + $i++;
if ( ! empty( $options['dropdown'] ) ) {
$lang_item->menu_item_parent = $item->db_id;
$lang_item->db_id = 0; // to avoid recursion
}
$new_items[] = $lang_item;
}
$offset += $i - 1;
} else {
$item->menu_order += $offset;
$new_items[] = $item;
}
}
return $new_items;
}
/**
* Returns the ancestors of a menu item
*
* @since 1.1.1
*
* @param object $item
* @return array ancestors ids
*/
public function get_ancestors( $item ) {
$ids = array();
$_anc_id = (int) $item->db_id;
while ( ( $_anc_id = get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) ) && ! in_array( $_anc_id, $ids ) ) {
$ids[] = $_anc_id;
}
return $ids;
}
/**
* Removes current-menu and current-menu-ancestor classes to lang switcher when not on the home page
*
* @since 1.1.1
*
* @param array $items
* @return array modified menu items
*/
public function wp_nav_menu_objects( $items ) {
$r_ids = $k_ids = array();
foreach ( $items as $item ) {
if ( ! empty( $item->classes ) && is_array( $item->classes ) ) {
if ( in_array( 'current-lang', $item->classes ) ) {
$item->classes = array_diff( $item->classes, array( 'current-menu-item' ) );
$r_ids = array_merge( $r_ids, $this->get_ancestors( $item ) ); // Remove the classes for these ancestors
} elseif ( in_array( 'current-menu-item', $item->classes ) ) {
$k_ids = array_merge( $k_ids, $this->get_ancestors( $item ) ); // Keep the classes for these ancestors
}
}
}
$r_ids = array_diff( $r_ids, $k_ids );
foreach ( $items as $item ) {
if ( ! empty( $item->db_id ) && in_array( $item->db_id, $r_ids ) ) {
$item->classes = array_diff( $item->classes, array( 'current-menu-ancestor', 'current-menu-parent', 'current_page_parent', 'current_page_ancestor' ) );
}
}
return $items;
}
/**
* Adds hreflang attribute for the language switcher menu items
* available since WP3.6
*
* @since 1.1
*
* @param array $atts
* @return array modified $atts
*/
public function nav_menu_link_attributes( $atts, $item, $args ) {
if ( isset( $item->lang ) ) {
$atts['lang'] = $atts['hreflang'] = esc_attr( $item->lang );
}
return $atts;
}
/**
* Fills the theme nav menus locations with the right menu in the right language
* Needs to wait for the language to be defined
*
* @since 1.2
*
* @param array|bool list of nav menus locations, false if menu locations have not been filled yet
* @return array|bool modified list of nav menus locations
*/
public function nav_menu_locations( $menus ) {
if ( is_array( $menus ) && ! empty( $this->curlang ) ) {
// First get multilingual menu locations from DB
$theme = get_option( 'stylesheet' );
foreach ( $menus as $loc => $menu ) {
$menus[ $loc ] = empty( $this->options['nav_menus'][ $theme ][ $loc ][ $this->curlang->slug ] ) ? 0 : $this->options['nav_menus'][ $theme ][ $loc ][ $this->curlang->slug ];
}
// Support for theme customizer
// Let's look for multilingual menu locations directly in $_POST as there are not in customizer object
if ( isset( $_POST['wp_customize'], $_POST['customized'] ) ) {
$customized = json_decode( wp_unslash( $_POST['customized'] ) );
if ( is_object( $customized ) ) {
foreach ( $customized as $key => $c ) {
if ( false !== strpos( $key, 'nav_menu_locations[' ) ) {
$loc = substr( trim( $key, ']' ), 19 );
$infos = $this->explode_location( $loc );
if ( $infos['lang'] == $this->curlang->slug ) {
$menus[ $infos['location'] ] = $c;
} elseif ( $this->curlang->slug == $this->options['default_lang'] ) {
$menus[ $loc ] = $c;
}
}
}
}
}
}
return $menus;
}
/**
* Attempt to translate the nav menu when it is hardcoded or when no location is defined in wp_nav_menu
*
* @since 1.7.10
*
* @param array $args
* @return array modified $args
*/
public function wp_nav_menu_args( $args ) {
$theme = get_option( 'stylesheet' );
if ( empty( $this->curlang ) || empty( $this->options['nav_menus'][ $theme ] ) ) {
return $args;
}
// Get the nav menu based on the requested menu
$menu = wp_get_nav_menu_object( $args['menu'] );
// Attempt to find a translation of this menu
// This obviously does not work if the nav menu has no associated theme location
if ( $menu ) {
foreach ( $this->options['nav_menus'][ $theme ] as $menus ) {
if ( in_array( $menu->term_id, $menus ) && ! empty( $menus[ $this->curlang->slug ] ) ) {
$args['menu'] = $menus[ $this->curlang->slug ];
return $args;
}
}
}
// Get the first menu that has items and and is in the current language 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, array( 'update_post_term_cache' => false ) ) ) {
foreach ( $this->options['nav_menus'][ $theme ] as $menus ) {
if ( in_array( $menu_maybe->term_id, $menus ) && ! empty( $menus[ $this->curlang->slug ] ) ) {
$args['menu'] = $menus[ $this->curlang->slug ];
return $args;
}
}
}
}
}
return $args;
}
/**
* Filters the nav menu location before the customizer so that it matches the temporary location in the customizer
*
* @since 1.8
*
* @param array $args wp_nav_menu $args
* @return array modified $args
*/
public function filter_args_before_customizer( $args ) {
if ( ! empty( $this->curlang ) ) {
$args['theme_location'] = $this->combine_location( $args['theme_location'], $this->curlang );
}
return $args;
}
/**
* Filters the nav menu location after the customizer to get back the true nav menu location for the theme
*
* @since 1.8
*
* @param array $args wp_nav_menu $args
* @return array modified $args
*/
public function filter_args_after_customizer( $args ) {
$infos = $this->explode_location( $args['theme_location'] );
$args['theme_location'] = $infos['location'];
return $args;
}
}
|