menu-functions.php (3621B)
1 <?php 2 /** 3 * Functions and filters related to the menus. 4 * 5 * Makes the default WordPress navigation use an HTML structure similar 6 * to the Navigation block. 7 * 8 * @link https://make.wordpress.org/themes/2020/07/06/printing-navigation-block-html-from-a-legacy-menu-in-themes/ 9 * 10 * @package WordPress 11 * @subpackage Twenty_Twenty_One 12 * @since Twenty Twenty-One 1.0 13 */ 14 15 /** 16 * Add a button to top-level menu items that has sub-menus. 17 * An icon is added using CSS depending on the value of aria-expanded. 18 * 19 * @since Twenty Twenty-One 1.0 20 * 21 * @param string $output Nav menu item start element. 22 * @param object $item Nav menu item. 23 * @param int $depth Depth. 24 * @param object $args Nav menu args. 25 * @return string Nav menu item start element. 26 */ 27 function twenty_twenty_one_add_sub_menu_toggle( $output, $item, $depth, $args ) { 28 if ( 0 === $depth && in_array( 'menu-item-has-children', $item->classes, true ) ) { 29 30 // Add toggle button. 31 $output .= '<button class="sub-menu-toggle" aria-expanded="false" onClick="twentytwentyoneExpandSubMenu(this)">'; 32 $output .= '<span class="icon-plus">' . twenty_twenty_one_get_icon_svg( 'ui', 'plus', 18 ) . '</span>'; 33 $output .= '<span class="icon-minus">' . twenty_twenty_one_get_icon_svg( 'ui', 'minus', 18 ) . '</span>'; 34 $output .= '<span class="screen-reader-text">' . esc_html__( 'Open menu', 'twentytwentyone' ) . '</span>'; 35 $output .= '</button>'; 36 } 37 return $output; 38 } 39 add_filter( 'walker_nav_menu_start_el', 'twenty_twenty_one_add_sub_menu_toggle', 10, 4 ); 40 41 /** 42 * Detects the social network from a URL and returns the SVG code for its icon. 43 * 44 * @since Twenty Twenty-One 1.0 45 * 46 * @param string $uri Social link. 47 * @param int $size The icon size in pixels. 48 * @return string 49 */ 50 function twenty_twenty_one_get_social_link_svg( $uri, $size = 24 ) { 51 return Twenty_Twenty_One_SVG_Icons::get_social_link_svg( $uri, $size ); 52 } 53 54 /** 55 * Displays SVG icons in the footer navigation. 56 * 57 * @since Twenty Twenty-One 1.0 58 * 59 * @param string $item_output The menu item's starting HTML output. 60 * @param WP_Post $item Menu item data object. 61 * @param int $depth Depth of the menu. Used for padding. 62 * @param stdClass $args An object of wp_nav_menu() arguments. 63 * @return string The menu item output with social icon. 64 */ 65 function twenty_twenty_one_nav_menu_social_icons( $item_output, $item, $depth, $args ) { 66 // Change SVG icon inside social links menu if there is supported URL. 67 if ( 'footer' === $args->theme_location ) { 68 $svg = twenty_twenty_one_get_social_link_svg( $item->url, 24 ); 69 if ( ! empty( $svg ) ) { 70 $item_output = str_replace( $args->link_before, $svg, $item_output ); 71 } 72 } 73 74 return $item_output; 75 } 76 77 add_filter( 'walker_nav_menu_start_el', 'twenty_twenty_one_nav_menu_social_icons', 10, 4 ); 78 79 /** 80 * Filters the arguments for a single nav menu item. 81 * 82 * @since Twenty Twenty-One 1.0 83 * 84 * @param stdClass $args An object of wp_nav_menu() arguments. 85 * @param WP_Post $item Menu item data object. 86 * @param int $depth Depth of menu item. Used for padding. 87 * @return stdClass 88 */ 89 function twenty_twenty_one_add_menu_description_args( $args, $item, $depth ) { 90 $args->link_after = ''; 91 if ( 0 === $depth && isset( $item->description ) && $item->description ) { 92 // The extra <span> element is here for styling purposes: Allows the description to not be underlined on hover. 93 $args->link_after = '<p class="menu-item-description"><span>' . $item->description . '</span></p>'; 94 } 95 return $args; 96 } 97 add_filter( 'nav_menu_item_args', 'twenty_twenty_one_add_menu_description_args', 10, 3 );