243 lines
8.4 KiB
PHP
243 lines
8.4 KiB
PHP
<?php
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/**
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* Functions which enhance the theme by hooking into WordPress.
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*
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* @package WordPress
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* @subpackage Twenty_Nineteen
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* @since Twenty Nineteen 1.0
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*/
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/**
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* Adds custom classes to the array of body classes.
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*
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* @param array $classes Classes for the body element.
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* @return array
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*/
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function twentynineteen_body_classes( $classes ) {
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if ( is_singular() ) {
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// Adds `singular` to singular pages.
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$classes[] = 'singular';
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} else {
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// Adds `hfeed` to non-singular pages.
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$classes[] = 'hfeed';
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}
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// Adds a class if image filters are enabled.
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if ( twentynineteen_image_filters_enabled() ) {
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$classes[] = 'image-filters-enabled';
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}
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return $classes;
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}
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add_filter( 'body_class', 'twentynineteen_body_classes' );
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/**
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* Adds custom class to the array of posts classes.
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*
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* @param array $classes A list of existing post class values.
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* @return array The filtered post class list.
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*/
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function twentynineteen_post_classes( $classes ) {
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$classes[] = 'entry';
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return $classes;
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}
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add_filter( 'post_class', 'twentynineteen_post_classes' );
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/**
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* Adds a pingback url auto-discovery header for single posts, pages, or attachments.
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*/
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function twentynineteen_pingback_header() {
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if ( is_singular() && pings_open() ) {
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echo '<link rel="pingback" href="', esc_url( get_bloginfo( 'pingback_url' ) ), '">';
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}
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}
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add_action( 'wp_head', 'twentynineteen_pingback_header' );
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/**
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* Changes comment form default fields.
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*/
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function twentynineteen_comment_form_defaults( $defaults ) {
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$comment_field = $defaults['comment_field'];
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// Adjust height of comment form.
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$defaults['comment_field'] = preg_replace( '/rows="\d+"/', 'rows="5"', $comment_field );
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return $defaults;
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}
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add_filter( 'comment_form_defaults', 'twentynineteen_comment_form_defaults' );
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/**
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* Filters the default archive titles.
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*/
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function twentynineteen_get_the_archive_title() {
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if ( is_category() ) {
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$title = __( 'Category Archives: ', 'twentynineteen' ) . '<span class="page-description">' . single_term_title( '', false ) . '</span>';
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} elseif ( is_tag() ) {
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$title = __( 'Tag Archives: ', 'twentynineteen' ) . '<span class="page-description">' . single_term_title( '', false ) . '</span>';
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} elseif ( is_author() ) {
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$title = __( 'Author Archives: ', 'twentynineteen' ) . '<span class="page-description">' . get_the_author_meta( 'display_name' ) . '</span>';
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} elseif ( is_year() ) {
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$title = __( 'Yearly Archives: ', 'twentynineteen' ) . '<span class="page-description">' . get_the_date( _x( 'Y', 'yearly archives date format', 'twentynineteen' ) ) . '</span>';
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} elseif ( is_month() ) {
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$title = __( 'Monthly Archives: ', 'twentynineteen' ) . '<span class="page-description">' . get_the_date( _x( 'F Y', 'monthly archives date format', 'twentynineteen' ) ) . '</span>';
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} elseif ( is_day() ) {
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$title = __( 'Daily Archives: ', 'twentynineteen' ) . '<span class="page-description">' . get_the_date() . '</span>';
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} elseif ( is_post_type_archive() ) {
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$title = __( 'Post Type Archives: ', 'twentynineteen' ) . '<span class="page-description">' . post_type_archive_title( '', false ) . '</span>';
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} elseif ( is_tax() ) {
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$tax = get_taxonomy( get_queried_object()->taxonomy );
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/* translators: %s: Taxonomy singular name. */
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$title = sprintf( esc_html__( '%s Archives:', 'twentynineteen' ), $tax->labels->singular_name );
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} else {
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$title = __( 'Archives:', 'twentynineteen' );
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}
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return $title;
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}
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add_filter( 'get_the_archive_title', 'twentynineteen_get_the_archive_title' );
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/**
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* Adds custom 'sizes' attribute to responsive image functionality for post thumbnails.
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*
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* @origin Twenty Nineteen 1.0
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*
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* @param string[] $attr Array of attribute values for the image markup, keyed by attribute name.
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* See wp_get_attachment_image().
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* @return string[] The filtered attributes for the image markup.
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*/
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function twentynineteen_post_thumbnail_sizes_attr( $attr ) {
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if ( is_admin() ) {
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return $attr;
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}
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if ( ! is_singular() ) {
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$attr['sizes'] = '(max-width: 34.9rem) calc(100vw - 2rem), (max-width: 53rem) calc(8 * (100vw / 12)), (min-width: 53rem) calc(6 * (100vw / 12)), 100vw';
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}
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return $attr;
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}
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add_filter( 'wp_get_attachment_image_attributes', 'twentynineteen_post_thumbnail_sizes_attr' );
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/**
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* Adds an extra menu to our nav for our priority+ navigation to use.
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*
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* @param string $nav_menu Nav menu.
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* @param object $args Nav menu args.
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* @return string More link for hidden menu items.
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*/
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function twentynineteen_add_ellipses_to_nav( $nav_menu, $args ) {
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if ( 'menu-1' === $args->theme_location ) :
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$nav_menu .= '
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<div class="main-menu-more">
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<ul class="main-menu">
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<li class="menu-item menu-item-has-children">
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<button class="submenu-expand main-menu-more-toggle is-empty" tabindex="-1"
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aria-label="' . esc_attr__( 'More', 'twentynineteen' ) . '" aria-haspopup="true" aria-expanded="false">' .
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twentynineteen_get_icon_svg( 'arrow_drop_down_ellipsis' ) . '
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</button>
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<ul class="sub-menu hidden-links">
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<li class="mobile-parent-nav-menu-item">
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<button class="menu-item-link-return">' .
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twentynineteen_get_icon_svg( 'chevron_left' ) .
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esc_html__( 'Back', 'twentynineteen' ) . '
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</button>
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</li>
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</ul>
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</li>
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</ul>
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</div>';
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endif;
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return $nav_menu;
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}
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add_filter( 'wp_nav_menu', 'twentynineteen_add_ellipses_to_nav', 10, 2 );
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/**
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* Handles WCAG 2.0 attributes for dropdown menus.
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*
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* Adjustments to menu attributes to support WCAG 2.0 recommendations
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* for flyout and dropdown menus.
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*
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* @ref https://www.w3.org/WAI/tutorials/menus/flyout/
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* @param array $atts {
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* The HTML attributes applied to the menu item's `<a>` element, empty strings are ignored.
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*
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* @type string $title Title attribute.
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* @type string $target Target attribute.
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* @type string $rel The rel attribute.
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* @type string $href The href attribute.
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* @type string $aria-current The aria-current attribute.
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* }
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* @param WP_Post $item The current menu item object.
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* @return string[] Modified attributes.
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*/
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function twentynineteen_nav_menu_link_attributes( $atts, $item ) {
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// Add [aria-haspopup] and [aria-expanded] to menu items that have children.
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$item_has_children = in_array( 'menu-item-has-children', $item->classes, true );
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if ( $item_has_children ) {
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$atts['aria-haspopup'] = 'true';
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$atts['aria-expanded'] = 'false';
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}
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return $atts;
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}
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add_filter( 'nav_menu_link_attributes', 'twentynineteen_nav_menu_link_attributes', 10, 2 );
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/**
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* Creates a nav menu item to be displayed on mobile to navigate from submenu back to the parent.
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*
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* This duplicates each parent nav menu item and makes it the first child of itself.
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*
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* @param array $sorted_menu_items Sorted nav menu items.
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* @param object $args Nav menu args.
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* @return array Amended nav menu items.
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*/
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function twentynineteen_add_mobile_parent_nav_menu_items( $sorted_menu_items, $args ) {
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static $pseudo_id = 0;
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if ( ! isset( $args->theme_location ) || 'menu-1' !== $args->theme_location ) {
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return $sorted_menu_items;
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}
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$amended_menu_items = array();
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foreach ( $sorted_menu_items as $nav_menu_item ) {
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$amended_menu_items[] = $nav_menu_item;
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if ( in_array( 'menu-item-has-children', $nav_menu_item->classes, true ) ) {
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$parent_menu_item = clone $nav_menu_item;
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$parent_menu_item->original_id = $nav_menu_item->ID;
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$parent_menu_item->ID = --$pseudo_id;
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$parent_menu_item->db_id = $parent_menu_item->ID;
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$parent_menu_item->object_id = $parent_menu_item->ID;
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$parent_menu_item->classes = array( 'mobile-parent-nav-menu-item' );
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$parent_menu_item->menu_item_parent = $nav_menu_item->ID;
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$amended_menu_items[] = $parent_menu_item;
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}
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}
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return $amended_menu_items;
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}
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add_filter( 'wp_nav_menu_objects', 'twentynineteen_add_mobile_parent_nav_menu_items', 10, 2 );
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/**
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* Adds a fragment identifier (to the content) to paginated links.
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*
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* @since Twenty Nineteen 2.6
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*
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* @param string $link The page number HTML output.
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* @param int $i Page number for paginated posts' page links.
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* @return string Formatted output in HTML.
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*/
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function twentynineteen_link_pages_link( $link, $i ) {
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if ( $i > 1 && preg_match( '/href="([^"]*)"/', $link, $matches ) ) {
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$link = str_replace( $matches[1], $matches[1] . '#content', $link );
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}
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return $link;
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}
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add_filter( 'wp_link_pages_link', 'twentynineteen_link_pages_link', 10, 2 );
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