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twentytwentyone
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template-functions.php
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<?php /** * Functions which enhance the theme by hooking into WordPress * * @package WordPress * @subpackage Twenty_Twenty_One * @since Twenty Twenty-One 1.0 */ /** * Adds custom classes to the array of body classes. * * @since Twenty Twenty-One 1.0 * * @param array $classes Classes for the body element. * * @return array */ function twenty_twenty_one_body_classes( $classes ) { // Helps detect if JS is enabled or not. $classes[] = 'no-js'; // Adds `singular` to singular pages, and `hfeed` to all other pages. $classes[] = is_singular() ? 'singular' : 'hfeed'; // Add a body class if main navigation is active. if ( has_nav_menu( 'primary' ) ) { $classes[] = 'has-main-navigation'; } // Add a body class if there are no footer widgets. if ( ! is_active_sidebar( 'sidebar-1' ) ) { $classes[] = 'no-widgets'; } return $classes; } add_filter( 'body_class', 'twenty_twenty_one_body_classes' ); /** * Adds custom class to the array of posts classes. * * @since Twenty Twenty-One 1.0 * * @param array $classes An array of CSS classes. * * @return array */ function twenty_twenty_one_post_classes( $classes ) { $classes[] = 'entry'; return $classes; } add_filter( 'post_class', 'twenty_twenty_one_post_classes', 10, 3 ); /** * Add a pingback url auto-discovery header for single posts, pages, or attachments. * * @since Twenty Twenty-One 1.0 * * @return void */ function twenty_twenty_one_pingback_header() { if ( is_singular() && pings_open() ) { echo '<link rel="pingback" href="', esc_url( get_bloginfo( 'pingback_url' ) ), '">'; } } add_action( 'wp_head', 'twenty_twenty_one_pingback_header' ); /** * Remove the `no-js` class from body if JS is supported. * * @since Twenty Twenty-One 1.0 * * @return void */ function twenty_twenty_one_supports_js() { echo '<script>document.body.classList.remove("no-js");</script>'; } add_action( 'wp_footer', 'twenty_twenty_one_supports_js' ); /** * Changes comment form default fields. * * @since Twenty Twenty-One 1.0 * * @param array $defaults The form defaults. * * @return array */ function twenty_twenty_one_comment_form_defaults( $defaults ) { // Adjust height of comment form. $defaults['comment_field'] = preg_replace( '/rows="\d+"/', 'rows="5"', $defaults['comment_field'] ); return $defaults; } add_filter( 'comment_form_defaults', 'twenty_twenty_one_comment_form_defaults' ); /** * Determines if post thumbnail can be displayed. * * @since Twenty Twenty-One 1.0 * * @return bool */ function twenty_twenty_one_can_show_post_thumbnail() { return apply_filters( 'twenty_twenty_one_can_show_post_thumbnail', ! post_password_required() && ! is_attachment() && has_post_thumbnail() ); } /** * Returns the size for avatars used in the theme. * * @since Twenty Twenty-One 1.0 * * @return int */ function twenty_twenty_one_get_avatar_size() { return 60; } /** * Creates continue reading text */ function twenty_twenty_one_continue_reading_text() { $continue_reading = sprintf( /* translators: %s: Name of current post. */ esc_html__( 'Continue reading %s', 'twentytwentyone' ), the_title( '<span class="screen-reader-text">', '</span>', false ) ); return $continue_reading; } /** * Create the continue reading link for excerpt. */ function twenty_twenty_one_continue_reading_link_excerpt() { if ( ! is_admin() ) { return '… <a class="more-link" href="' . esc_url( get_permalink() ) . '">' . twenty_twenty_one_continue_reading_text() . '</a>'; } } // Filter the excerpt more link. add_filter( 'excerpt_more', 'twenty_twenty_one_continue_reading_link_excerpt' ); /** * Create the continue reading link. */ function twenty_twenty_one_continue_reading_link() { if ( ! is_admin() ) { return '<div class="more-link-container"><a class="more-link" href="' . esc_url( get_permalink() ) . '#more-' . esc_attr( get_the_ID() ) . '">' . twenty_twenty_one_continue_reading_text() . '</a></div>'; } } // Filter the excerpt more link. add_filter( 'the_content_more_link', 'twenty_twenty_one_continue_reading_link' ); if ( ! function_exists( 'twenty_twenty_one_post_title' ) ) { /** * Add a title to posts and pages that are missing titles. * * @since Twenty Twenty-One 1.0 * * @param string $title The title. * * @return string */ function twenty_twenty_one_post_title( $title ) { return '' === $title ? esc_html_x( 'Untitled', 'Added to posts and pages that are missing titles', 'twentytwentyone' ) : $title; } } add_filter( 'the_title', 'twenty_twenty_one_post_title' ); /** * Gets the SVG code for a given icon. * * @since Twenty Twenty-One 1.0 * * @param string $group The icon group. * @param string $icon The icon. * @param int $size The icon size in pixels. * * @return string */ function twenty_twenty_one_get_icon_svg( $group, $icon, $size = 24 ) { return Twenty_Twenty_One_SVG_Icons::get_svg( $group, $icon, $size ); } /** * Changes the default navigation arrows to svg icons * * @param string $calendar_output The generated HTML of the calendar. * * @return string */ function twenty_twenty_one_change_calendar_nav_arrows( $calendar_output ) { $calendar_output = str_replace( '« ', is_rtl() ? twenty_twenty_one_get_icon_svg( 'ui', 'arrow_right' ) : twenty_twenty_one_get_icon_svg( 'ui', 'arrow_left' ), $calendar_output ); $calendar_output = str_replace( ' »', is_rtl() ? twenty_twenty_one_get_icon_svg( 'ui', 'arrow_left' ) : twenty_twenty_one_get_icon_svg( 'ui', 'arrow_right' ), $calendar_output ); return $calendar_output; } add_filter( 'get_calendar', 'twenty_twenty_one_change_calendar_nav_arrows' ); /** * Get custom CSS. * * Return CSS for non-latin language, if available, or null * * @param string $type Whether to return CSS for the "front-end", "block-editor" or "classic-editor". * * @return string */ function twenty_twenty_one_get_non_latin_css( $type = 'front-end' ) { // Fetch site locale. $locale = get_bloginfo( 'language' ); // Define fallback fonts for non-latin languages. $font_family = apply_filters( 'twenty_twenty_one_get_localized_font_family_types', array( // Arabic. 'ar' => array( 'Tahoma', 'Arial', 'sans-serif' ), 'ary' => array( 'Tahoma', 'Arial', 'sans-serif' ), 'azb' => array( 'Tahoma', 'Arial', 'sans-serif' ), 'ckb' => array( 'Tahoma', 'Arial', 'sans-serif' ), 'fa-IR' => array( 'Tahoma', 'Arial', 'sans-serif' ), 'haz' => array( 'Tahoma', 'Arial', 'sans-serif' ), 'ps' => array( 'Tahoma', 'Arial', 'sans-serif' ), // Chinese Simplified (China) - Noto Sans SC. 'zh-CN' => array( '\'PingFang SC\'', '\'Helvetica Neue\'', '\'Microsoft YaHei New\'', '\'STHeiti Light\'', 'sans-serif' ), // Chinese Traditional (Taiwan) - Noto Sans TC. 'zh-TW' => array( '\'PingFang TC\'', '\'Helvetica Neue\'', '\'Microsoft YaHei New\'', '\'STHeiti Light\'', 'sans-serif' ), // Chinese (Hong Kong) - Noto Sans HK. 'zh-HK' => array( '\'PingFang HK\'', '\'Helvetica Neue\'', '\'Microsoft YaHei New\'', '\'STHeiti Light\'', 'sans-serif' ), // Cyrillic. 'bel' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 'bg-BG' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 'kk' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 'mk-MK' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 'mn' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 'ru-RU' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 'sah' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 'sr-RS' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 'tt-RU' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), 'uk' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ), // Devanagari. 'bn-BD' => array( 'Arial', 'sans-serif' ), 'hi-IN' => array( 'Arial', 'sans-serif' ), 'mr' => array( 'Arial', 'sans-serif' ), 'ne-NP' => array( 'Arial', 'sans-serif' ), // Greek. 'el' => array( '\'Helvetica Neue\', Helvetica, Arial, sans-serif' ), // Gujarati. 'gu' => array( 'Arial', 'sans-serif' ), // Hebrew. 'he-IL' => array( '\'Arial Hebrew\'', 'Arial', 'sans-serif' ), // Japanese. 'ja' => array( 'sans-serif' ), // Korean. 'ko-KR' => array( '\'Apple SD Gothic Neo\'', '\'Malgun Gothic\'', '\'Nanum Gothic\'', 'Dotum', 'sans-serif' ), // Thai. 'th' => array( '\'Sukhumvit Set\'', '\'Helvetica Neue\'', 'Helvetica', 'Arial', 'sans-serif' ), // Vietnamese. 'vi' => array( '\'Libre Franklin\'', 'sans-serif' ), ) ); // Return if the selected language has no fallback fonts. if ( empty( $font_family[ $locale ] ) ) { return ''; } // Define elements to apply fallback fonts to. $elements = apply_filters( 'twenty_twenty_one_get_localized_font_family_elements', array( 'front-end' => array( 'body', 'input', 'textarea', 'button', '.button', '.faux-button', '.wp-block-button__link', '.wp-block-file__button', '.has-drop-cap:not(:focus)::first-letter', '.has-drop-cap:not(:focus)::first-letter', '.entry-content .wp-block-archives', '.entry-content .wp-block-categories', '.entry-content .wp-block-cover-image', '.entry-content .wp-block-latest-comments', '.entry-content .wp-block-latest-posts', '.entry-content .wp-block-pullquote', '.entry-content .wp-block-quote.is-large', '.entry-content .wp-block-quote.is-style-large', '.entry-content .wp-block-archives *', '.entry-content .wp-block-categories *', '.entry-content .wp-block-latest-posts *', '.entry-content .wp-block-latest-comments *', '.entry-content p', '.entry-content ol', '.entry-content ul', '.entry-content dl', '.entry-content dt', '.entry-content cite', '.entry-content figcaption', '.entry-content .wp-caption-text', '.comment-content p', '.comment-content ol', '.comment-content ul', '.comment-content dl', '.comment-content dt', '.comment-content cite', '.comment-content figcaption', '.comment-content .wp-caption-text', '.widget_text p', '.widget_text ol', '.widget_text ul', '.widget_text dl', '.widget_text dt', '.widget-content .rssSummary', '.widget-content cite', '.widget-content figcaption', '.widget-content .wp-caption-text' ), 'block-editor' => array( '.editor-styles-wrapper > *', '.editor-styles-wrapper p', '.editor-styles-wrapper ol', '.editor-styles-wrapper ul', '.editor-styles-wrapper dl', '.editor-styles-wrapper dt', '.editor-post-title__block .editor-post-title__input', '.editor-styles-wrapper .wp-block h1', '.editor-styles-wrapper .wp-block h2', '.editor-styles-wrapper .wp-block h3', '.editor-styles-wrapper .wp-block h4', '.editor-styles-wrapper .wp-block h5', '.editor-styles-wrapper .wp-block h6', '.editor-styles-wrapper .has-drop-cap:not(:focus)::first-letter', '.editor-styles-wrapper cite', '.editor-styles-wrapper figcaption', '.editor-styles-wrapper .wp-caption-text' ), 'classic-editor' => array( 'body#tinymce.wp-editor', 'body#tinymce.wp-editor p', 'body#tinymce.wp-editor ol', 'body#tinymce.wp-editor ul', 'body#tinymce.wp-editor dl', 'body#tinymce.wp-editor dt', 'body#tinymce.wp-editor figcaption', 'body#tinymce.wp-editor .wp-caption-text', 'body#tinymce.wp-editor .wp-caption-dd', 'body#tinymce.wp-editor cite', 'body#tinymce.wp-editor table' ), ) ); // Return if the specified type doesn't exist. if ( empty( $elements[ $type ] ) ) { return ''; } // Include file if function doesn't exist. if ( ! function_exists( 'twenty_twenty_one_generate_css' ) ) { require_once get_theme_file_path( 'inc/custom-css.php' ); // phpcs:ignore WPThemeReview.CoreFunctionality.FileInclude.FileIncludeFound } // Return the specified styles. return twenty_twenty_one_generate_css( // @phpstan-ignore-line. implode( ',', $elements[ $type ] ), 'font-family', implode( ',', $font_family[ $locale ] ), null, null, false ); } /** * Print the first instance of a block in the content, and then break away. * * @since Twenty Twenty-One 1.0 * * @param string $block_name The full block type name, or a partial match. * Example: `core/image`, `core-embed/*`. * @param string|null $content The content to search in. Use null for get_the_content(). * @param int $instances How many instances of the block will be printed (max). Defaults to 1. * * @return bool Returns true if a block was located & printed, otherwise false. */ function twenty_twenty_one_print_first_instance_of_block( $block_name, $content = null, $instances = 1 ) { $instances_count = 0; $blocks_content = ''; if ( ! $content ) { $content = get_the_content(); } // Parse blocks in the content. $blocks = parse_blocks( $content ); // Loop blocks. foreach ( $blocks as $block ) { // Sanity check. if ( ! isset( $block['blockName'] ) ) { continue; } // Check if this the block matches the $block_name. $is_matching_block = false; // If the block ends with *, try to match the first portion. if ( '*' === $block_name[-1] ) { $is_matching_block = 0 === strpos( $block['blockName'], rtrim( $block_name, '*' ) ); } else { $is_matching_block = $block_name === $block['blockName']; } if ( $is_matching_block ) { // Increment count. $instances_count++; // Add the block HTML. $blocks_content .= render_block( $block ); // Break the loop if the $instances count was reached. if ( $instances_count >= $instances ) { break; } } } if ( $blocks_content ) { echo apply_filters( 'the_content', $blocks_content ); // phpcs:ignore WordPress.Security.EscapeOutput return true; } return false; } /** * Retrieve protected post password form content. * * @since Twenty Twenty-One 1.0 * * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post. * @return string HTML content for password form for password protected post. */ function twenty_twenty_one_password_form( $post = 0 ) { $post = get_post( $post ); $label = 'pwbox-' . ( empty( $post->ID ) ? wp_rand() : $post->ID ); $output = '<p class="post-password-message">' . esc_html__( 'This content is password protected. Please enter a password to view.', 'twentytwentyone' ) . '</p> <form action="' . esc_url( site_url( 'wp-login.php?action=postpass', 'login_post' ) ) . '" class="post-password-form" method="post"> <label class="post-password-form__label" for="' . esc_attr( $label ) . '">' . esc_html_x( 'Password', 'Post password form', 'twentytwentyone' ) . '</label><input class="post-password-form__input" name="post_password" id="' . esc_attr( $label ) . '" type="password" size="20" /><input type="submit" class="post-password-form__submit" name="' . esc_attr_x( 'Submit', 'Post password form', 'twentytwentyone' ) . '" value="' . esc_attr_x( 'Enter', 'Post password form', 'twentytwentyone' ) . '" /></form> '; return $output; } add_filter( 'the_password_form', 'twenty_twenty_one_password_form' ); /** * Filters the list of attachment image attributes. * * @since Twenty Twenty-One 1.0 * * @param array $attr Array of attribute values for the image markup, keyed by attribute name. * See wp_get_attachment_image(). * @param WP_Post $attachment Image attachment post. * @param string|array $size Requested size. Image size or array of width and height values * (in that order). Default 'thumbnail'. * * @return array */ function twenty_twenty_one_get_attachment_image_attributes( $attr, $attachment, $size ) { if ( is_admin() ) { return $attr; } if ( isset( $attr['class'] ) && false !== strpos( $attr['class'], 'custom-logo' ) ) { return $attr; } $width = false; $height = false; if ( is_array( $size ) ) { $width = (int) $size[0]; $height = (int) $size[1]; } elseif ( $attachment && is_object( $attachment ) && $attachment->ID ) { $meta = wp_get_attachment_metadata( $attachment->ID ); if ( $meta['width'] && $meta['height'] ) { $width = (int) $meta['width']; $height = (int) $meta['height']; } } if ( $width && $height ) { // Add style. $attr['style'] = isset( $attr['style'] ) ? $attr['style'] : ''; $attr['style'] = 'width:100%;height:' . round( 100 * $height / $width, 2 ) . '%;max-width:' . $width . 'px;' . $attr['style']; } return $attr; } add_filter( 'wp_get_attachment_image_attributes', 'twenty_twenty_one_get_attachment_image_attributes', 10, 3 );