name : admin-nav-menu.php <?php /** * Manages custom menus translations as well as the language switcher menu item on admin side * * @since 1.2 */ class PLL_Admin_Nav_Menu extends PLL_Nav_Menu { /** * Constructor: setups filters and actions * * @since 1.2 * * @param object $polylang */ public function __construct( &$polylang ) { parent::__construct( $polylang ); // Populates nav menus locations // Since WP 4.4, must be done before customize_register is fired add_filter( 'theme_mod_nav_menu_locations', array( $this, 'theme_mod_nav_menu_locations' ), 20 ); // Integration in the WP menu interface add_action( 'admin_init', array( $this, 'admin_init' ) ); // after Polylang upgrade } /** * Setups filters and terms * adds the language switcher metabox and create new nav menu locations * * @since 1.1 */ public function admin_init() { add_action( 'admin_enqueue_scripts', array( $this, 'admin_enqueue_scripts' ) ); add_action( 'wp_update_nav_menu_item', array( $this, 'wp_update_nav_menu_item' ), 10, 2 ); // Translation of menus based on chosen locations add_filter( 'pre_update_option_theme_mods_' . $this->theme, array( $this, 'pre_update_option_theme_mods' ) ); add_action( 'delete_nav_menu', array( $this, 'delete_nav_menu' ) ); // FIXME is it possible to choose the order ( after theme locations in WP3.5 and older ) ? // FIXME not displayed if Polylang is activated before the first time the user goes to nav menus http://core.trac.wordpress.org/ticket/16828 add_meta_box( 'pll_lang_switch_box', __( 'Language switcher', 'polylang' ), array( $this, 'lang_switch' ), 'nav-menus', 'side', 'high' ); $this->create_nav_menu_locations(); } /** * Language switcher metabox * The checkbox and all hidden fields are important * Thanks to John Morris for his very interesting post http://www.johnmorrisonline.com/how-to-add-a-fully-functional-custom-meta-box-to-wordpress-navigation-menus/ * * @since 1.1 */ public function lang_switch() { global $_nav_menu_placeholder, $nav_menu_selected_id; $_nav_menu_placeholder = 0 > $_nav_menu_placeholder ? $_nav_menu_placeholder - 1 : -1; ?> <div id="posttype-lang-switch" class="posttypediv"> <div id="tabs-panel-lang-switch" class="tabs-panel tabs-panel-active"> <ul id="lang-switch-checklist" class="categorychecklist form-no-clear"> <li> <label class="menu-item-title"> <input type="checkbox" class="menu-item-checkbox" name="menu-item[<?php echo (int) $_nav_menu_placeholder; ?>][menu-item-object-id]" value="-1"> <?php esc_html_e( 'Languages', 'polylang' ); ?> </label> <input type="hidden" class="menu-item-type" name="menu-item[<?php echo (int) $_nav_menu_placeholder; ?>][menu-item-type]" value="custom"> <input type="hidden" class="menu-item-title" name="menu-item[<?php echo (int) $_nav_menu_placeholder; ?>][menu-item-title]" value="<?php esc_html_e( 'Languages', 'polylang' ); ?>"> <input type="hidden" class="menu-item-url" name="menu-item[<?php echo (int) $_nav_menu_placeholder; ?>][menu-item-url]" value="#pll_switcher"> </li> </ul> </div> <p class="button-controls"> <span class="add-to-menu"> <input type="submit" <?php disabled( $nav_menu_selected_id, 0 ); ?> class="button-secondary submit-add-to-menu right" value="<?php esc_attr_e( 'Add to Menu', 'polylang' ); ?>" name="add-post-type-menu-item" id="submit-posttype-lang-switch"> <span class="spinner"></span> </span> </p> </div> <?php } /** * Prepares javascript to modify the language switcher menu item * * @since 1.1 */ public function admin_enqueue_scripts() { $screen = get_current_screen(); if ( 'nav-menus' != $screen->base ) { return; } $suffix = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '' : '.min'; wp_enqueue_script( 'pll_nav_menu', plugins_url( '/js/nav-menu' . $suffix . '.js', POLYLANG_FILE ), array( 'jquery' ), POLYLANG_VERSION ); $data['strings'] = PLL_Switcher::get_switcher_options( 'menu', 'string' ); // The strings for the options $data['title'] = __( 'Languages', 'polylang' ); // The title // Get all language switcher menu items $items = get_posts( array( 'numberposts' => -1, 'nopaging' => true, 'post_type' => 'nav_menu_item', 'fields' => 'ids', 'meta_key' => '_pll_menu_item', ) ); // The options values for the language switcher $data['val'] = array(); foreach ( $items as $item ) { $data['val'][ $item ] = get_post_meta( $item, '_pll_menu_item', true ); } // Send all these data to javascript wp_localize_script( 'pll_nav_menu', 'pll_data', $data ); } /** * Save our menu item options * * @since 1.1 * * @param int $menu_id not used * @param int $menu_item_db_id */ public function wp_update_nav_menu_item( $menu_id = 0, $menu_item_db_id = 0 ) { if ( empty( $_POST['menu-item-url'][ $menu_item_db_id ] ) || '#pll_switcher' !== $_POST['menu-item-url'][ $menu_item_db_id ] ) { // phpcs:ignore WordPress.Security.NonceVerification return; } // Security check as 'wp_update_nav_menu_item' can be called from outside WP admin if ( current_user_can( 'edit_theme_options' ) ) { check_admin_referer( 'update-nav_menu', 'update-nav-menu-nonce' ); $options = array( 'hide_if_no_translation' => 0, 'hide_current' => 0, 'force_home' => 0, 'show_flags' => 0, 'show_names' => 1, 'dropdown' => 0 ); // Default values // Our jQuery form has not been displayed if ( empty( $_POST['menu-item-pll-detect'][ $menu_item_db_id ] ) ) { if ( ! get_post_meta( $menu_item_db_id, '_pll_menu_item', true ) ) { // Our options were never saved update_post_meta( $menu_item_db_id, '_pll_menu_item', $options ); } } else { foreach ( $options as $opt => $v ) { $options[ $opt ] = empty( $_POST[ 'menu-item-' . $opt ][ $menu_item_db_id ] ) ? 0 : 1; } update_post_meta( $menu_item_db_id, '_pll_menu_item', $options ); // Allow us to easily identify our nav menu item } } } /** * Assign menu languages and translations based on ( temporary ) locations * * @since 1.8 * * @param array $locations nav menu locations * @return array */ public function update_nav_menu_locations( $locations ) { $default = $this->options['default_lang']; // Extract language and menu from locations foreach ( $locations as $loc => $menu ) { $infos = $this->explode_location( $loc ); $this->options['nav_menus'][ $this->theme ][ $infos['location'] ][ $infos['lang'] ] = $menu; if ( $this->options['default_lang'] != $infos['lang'] ) { unset( $locations[ $loc ] ); // Remove temporary locations before database update } } update_option( 'polylang', $this->options ); return $locations; } /** * Assign menu languages and translations based on ( temporary ) locations * * @since 1.1 * * @param array $mods theme mods * @return unmodified $mods */ public function pre_update_option_theme_mods( $mods ) { if ( current_user_can( 'edit_theme_options' ) && isset( $mods['nav_menu_locations'] ) ) { // Manage Locations tab in Appearance -> Menus if ( isset( $_GET['action'] ) && 'locations' === $_GET['action'] ) { // phpcs:ignore WordPress.Security.NonceVerification check_admin_referer( 'save-menu-locations' ); $this->options['nav_menus'][ $this->theme ] = array(); } // Edit Menus tab in Appearance -> Menus // Add the test of $_POST['update-nav-menu-nonce'] to avoid conflict with Vantage theme elseif ( isset( $_POST['action'], $_POST['update-nav-menu-nonce'] ) && 'update' === $_POST['action'] ) { check_admin_referer( 'update-nav_menu', 'update-nav-menu-nonce' ); $this->options['nav_menus'][ $this->theme ] = array(); } // Customizer // Don't reset locations in this case. // see http://wordpress.org/support/topic/menus-doesnt-show-and-not-saved-in-theme-settings-multilingual-site elseif ( isset( $_POST['action'] ) && 'customize_save' == $_POST['action'] ) { check_ajax_referer( 'save-customize_' . $GLOBALS['wp_customize']->get_stylesheet(), 'nonce' ); } else { return $mods; // No modification for nav menu locations } $mods['nav_menu_locations'] = $this->update_nav_menu_locations( $mods['nav_menu_locations'] ); } return $mods; } /** * Fills temporary menu locations based on menus translations * * @since 1.2 * * @param bool|array $menus * @return bool|array modified list of menu locations */ public function theme_mod_nav_menu_locations( $menus ) { // Prefill locations with 0 value in case a location does not exist in $menus $locations = get_registered_nav_menus(); if ( is_array( $locations ) ) { $locations = array_fill_keys( array_keys( $locations ), 0 ); $menus = is_array( $menus ) ? array_merge( $locations, $menus ) : $locations; } if ( is_array( $menus ) ) { foreach ( $menus as $loc => $menu ) { foreach ( $this->model->get_languages_list() as $lang ) { if ( ! empty( $this->options['nav_menus'][ $this->theme ][ $loc ][ $lang->slug ] ) && term_exists( $this->options['nav_menus'][ $this->theme ][ $loc ][ $lang->slug ], 'nav_menu' ) ) { $menus[ $this->combine_location( $loc, $lang ) ] = $this->options['nav_menus'][ $this->theme ][ $loc ][ $lang->slug ]; } } } } return $menus; } /** * Removes the nav menu term_id from the locations stored in Polylang options when a nav menu is deleted * * @since 1.7.3 * * @param int $term_id nav menu id */ public function delete_nav_menu( $term_id ) { if ( isset( $this->options['nav_menus'] ) ) { foreach ( $this->options['nav_menus'] as $theme => $locations ) { foreach ( $locations as $loc => $languages ) { foreach ( $languages as $lang => $menu_id ) { if ( $menu_id === $term_id ) { unset( $this->options['nav_menus'][ $theme ][ $loc ][ $lang ] ); } } } } update_option( 'polylang', $this->options ); } } }