422 lines
12 KiB
PHP
422 lines
12 KiB
PHP
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<?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 1.0.0
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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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function twentynineteen_post_classes( $classes, $class, $post_id ) {
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$classes[] = 'entry';
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return $classes;
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}
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add_filter( 'post_class', 'twentynineteen_post_classes', 10, 3 );
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/**
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* Add 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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* Determines if post thumbnail can be displayed.
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*/
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function twentynineteen_can_show_post_thumbnail() {
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return apply_filters( 'twentynineteen_can_show_post_thumbnail', ! post_password_required() && ! is_attachment() && has_post_thumbnail() );
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}
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/**
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* Returns true if image filters are enabled on the theme options.
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*/
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function twentynineteen_image_filters_enabled() {
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return 0 !== get_theme_mod( 'image_filter', 1 );
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}
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/**
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* Add 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 array $attr Attributes for the image markup.
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* @return string Value for use in post thumbnail 'sizes' attribute.
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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', 10, 1 );
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/**
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* Returns the size for avatars used in the theme.
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*/
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function twentynineteen_get_avatar_size() {
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return 60;
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}
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/**
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* Returns true if comment is by author of the post.
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*
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* @see get_comment_class()
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*/
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function twentynineteen_is_comment_by_post_author( $comment = null ) {
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if ( is_object( $comment ) && $comment->user_id > 0 ) {
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$user = get_userdata( $comment->user_id );
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$post = get_post( $comment->comment_post_ID );
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if ( ! empty( $user ) && ! empty( $post ) ) {
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return $comment->user_id === $post->post_author;
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}
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}
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return false;
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}
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/**
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* Returns information about the current post's discussion, with cache support.
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*/
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function twentynineteen_get_discussion_data() {
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static $discussion, $post_id;
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$current_post_id = get_the_ID();
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if ( $current_post_id === $post_id ) {
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return $discussion; /* If we have discussion information for post ID, return cached object */
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} else {
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$post_id = $current_post_id;
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}
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$comments = get_comments(
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array(
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'post_id' => $current_post_id,
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'orderby' => 'comment_date_gmt',
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'order' => get_option( 'comment_order', 'asc' ), /* Respect comment order from Settings » Discussion. */
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'status' => 'approve',
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'number' => 20, /* Only retrieve the last 20 comments, as the end goal is just 6 unique authors */
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)
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);
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$authors = array();
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foreach ( $comments as $comment ) {
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$authors[] = ( (int) $comment->user_id > 0 ) ? (int) $comment->user_id : $comment->comment_author_email;
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}
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$authors = array_unique( $authors );
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$discussion = (object) array(
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'authors' => array_slice( $authors, 0, 6 ), /* Six unique authors commenting on the post. */
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'responses' => get_comments_number( $current_post_id ), /* Number of responses. */
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);
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return $discussion;
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}
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/**
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* Add an extra menu to our nav for our priority+ navigation to use
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*
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* @param object $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 .= '<div class="main-menu-more">';
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$nav_menu .= '<ul class="main-menu">';
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$nav_menu .= '<li class="menu-item menu-item-has-children">';
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$nav_menu .= '<button class="submenu-expand main-menu-more-toggle is-empty" tabindex="-1" aria-label="More" aria-haspopup="true" aria-expanded="false">';
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$nav_menu .= '<span class="screen-reader-text">' . esc_html__( 'More', 'twentynineteen' ) . '</span>';
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$nav_menu .= twentynineteen_get_icon_svg( 'arrow_drop_down_ellipsis' );
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$nav_menu .= '</button>';
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$nav_menu .= '<ul class="sub-menu hidden-links">';
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$nav_menu .= '<li id="menu-item--1" class="mobile-parent-nav-menu-item menu-item--1">';
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$nav_menu .= '<button class="menu-item-link-return">';
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$nav_menu .= twentynineteen_get_icon_svg( 'chevron_left' );
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$nav_menu .= esc_html__( 'Back', 'twentynineteen' );
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$nav_menu .= '</button>';
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$nav_menu .= '</li>';
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$nav_menu .= '</ul>';
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$nav_menu .= '</li>';
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$nav_menu .= '</ul>';
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$nav_menu .= '</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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* WCAG 2.0 Attributes for Dropdown Menus
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*
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* Adjustments to menu attributes tot 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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*/
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function twentynineteen_nav_menu_link_attributes( $atts, $item, $args, $depth ) {
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// Add [aria-haspopup] and [aria-expanded] to menu items that have children
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$item_has_children = in_array( 'menu-item-has-children', $item->classes );
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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, 4 );
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/**
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* Add a dropdown icon to top-level menu items.
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*
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* @param string $output Nav menu item start element.
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* @param object $item Nav menu item.
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* @param int $depth Depth.
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* @param object $args Nav menu args.
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* @return string Nav menu item start element.
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* Add a dropdown icon to top-level menu items
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*/
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function twentynineteen_add_dropdown_icons( $output, $item, $depth, $args ) {
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// Only add class to 'top level' items on the 'primary' menu.
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if ( ! isset( $args->theme_location ) || 'menu-1' !== $args->theme_location ) {
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return $output;
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}
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if ( in_array( 'mobile-parent-nav-menu-item', $item->classes, true ) && isset( $item->original_id ) ) {
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// Inject the keyboard_arrow_left SVG inside the parent nav menu item, and let the item link to the parent item.
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// @todo Only do this for nested submenus? If on a first-level submenu, then really the link could be "#" since the desire is to remove the target entirely.
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$link = sprintf(
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'<button class="menu-item-link-return" tabindex="-1">%s',
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twentynineteen_get_icon_svg( 'chevron_left', 24 )
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);
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// replace opening <a> with <button>
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$output = preg_replace(
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'/<a\s.*?>/',
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$link,
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$output,
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1 // Limit.
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);
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// replace closing </a> with </button>
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$output = preg_replace(
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'#</a>#i',
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'</button>',
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$output,
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1 // Limit.
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);
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} elseif ( in_array( 'menu-item-has-children', $item->classes, true ) ) {
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// Add SVG icon to parent items.
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$icon = twentynineteen_get_icon_svg( 'keyboard_arrow_down', 24 );
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$output .= sprintf(
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'<button class="submenu-expand" tabindex="-1">%s</button>',
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$icon
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);
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}
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return $output;
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}
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add_filter( 'walker_nav_menu_start_el', 'twentynineteen_add_dropdown_icons', 10, 4 );
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/**
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* Create 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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* Convert HSL to HEX colors
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||
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*/
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||
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function twentynineteen_hsl_hex( $h, $s, $l, $to_hex = true ) {
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||
|
|
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||
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|
$h /= 360;
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||
|
|
$s /= 100;
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||
|
|
$l /= 100;
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||
|
|
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||
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|
$r = $l;
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||
|
|
$g = $l;
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||
|
|
$b = $l;
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||
|
|
$v = ( $l <= 0.5 ) ? ( $l * ( 1.0 + $s ) ) : ( $l + $s - $l * $s );
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||
|
|
if ( $v > 0 ) {
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||
|
|
$m;
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||
|
|
$sv;
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||
|
|
$sextant;
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||
|
|
$fract;
|
||
|
|
$vsf;
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||
|
|
$mid1;
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||
|
|
$mid2;
|
||
|
|
|
||
|
|
$m = $l + $l - $v;
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||
|
|
$sv = ( $v - $m ) / $v;
|
||
|
|
$h *= 6.0;
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||
|
|
$sextant = floor( $h );
|
||
|
|
$fract = $h - $sextant;
|
||
|
|
$vsf = $v * $sv * $fract;
|
||
|
|
$mid1 = $m + $vsf;
|
||
|
|
$mid2 = $v - $vsf;
|
||
|
|
|
||
|
|
switch ( $sextant ) {
|
||
|
|
case 0:
|
||
|
|
$r = $v;
|
||
|
|
$g = $mid1;
|
||
|
|
$b = $m;
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
$r = $mid2;
|
||
|
|
$g = $v;
|
||
|
|
$b = $m;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
$r = $m;
|
||
|
|
$g = $v;
|
||
|
|
$b = $mid1;
|
||
|
|
break;
|
||
|
|
case 3:
|
||
|
|
$r = $m;
|
||
|
|
$g = $mid2;
|
||
|
|
$b = $v;
|
||
|
|
break;
|
||
|
|
case 4:
|
||
|
|
$r = $mid1;
|
||
|
|
$g = $m;
|
||
|
|
$b = $v;
|
||
|
|
break;
|
||
|
|
case 5:
|
||
|
|
$r = $v;
|
||
|
|
$g = $m;
|
||
|
|
$b = $mid2;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$r = round( $r * 255, 0 );
|
||
|
|
$g = round( $g * 255, 0 );
|
||
|
|
$b = round( $b * 255, 0 );
|
||
|
|
|
||
|
|
if ( $to_hex ) {
|
||
|
|
|
||
|
|
$r = ( $r < 15 ) ? '0' . dechex( $r ) : dechex( $r );
|
||
|
|
$g = ( $g < 15 ) ? '0' . dechex( $g ) : dechex( $g );
|
||
|
|
$b = ( $b < 15 ) ? '0' . dechex( $b ) : dechex( $b );
|
||
|
|
|
||
|
|
return "#$r$g$b";
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
return "rgb($r, $g, $b)";
|
||
|
|
}
|