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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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* @package WordPress

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* @subpackage Twenty_Twenty_One

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* @since Twenty Twenty-One 1.0

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/**

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* Adds custom classes to the array of body classes.

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* @since Twenty Twenty-One 1.0

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* @param array $classes Classes for the body element.

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* @return array

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function twenty_twenty_one_body_classes( $classes ) {

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// Helps detect if JS is enabled or not.

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$classes[] = 'no-js';

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// Adds `singular` to singular pages, and `hfeed` to all other pages.

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$classes[] = is_singular() ? 'singular' : 'hfeed';

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// Add a body class if main navigation is active.

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if ( has_nav_menu( 'primary' ) ) {

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$classes[] = 'has-main-navigation';

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}

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// Add a body class if there are no footer widgets.

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if ( ! is_active_sidebar( 'sidebar-1' ) ) {

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$classes[] = 'no-widgets';

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}

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return $classes;

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}

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add_filter( 'body_class', 'twenty_twenty_one_body_classes' );

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/**

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* Adds custom class to the array of posts classes.

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* @since Twenty Twenty-One 1.0

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* @param array $classes An array of CSS classes.

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* @return array

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function twenty_twenty_one_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', 'twenty_twenty_one_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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* @since Twenty Twenty-One 1.0

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* @return void

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function twenty_twenty_one_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', 'twenty_twenty_one_pingback_header' );

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/**

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* Remove the `no-js` class from body if JS is supported.

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* @since Twenty Twenty-One 1.0

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* @return void

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function twenty_twenty_one_supports_js() {

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echo '<script>document.body.classList.remove("no-js");</script>';

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}

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add_action( 'wp_footer', 'twenty_twenty_one_supports_js' );

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/**

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* Changes comment form default fields.

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* @since Twenty Twenty-One 1.0

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* @param array $defaults The form defaults.

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* @return array

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function twenty_twenty_one_comment_form_defaults( $defaults ) {

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// Adjust height of comment form.

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$defaults['comment_field'] = preg_replace( '/rows="\d+"/', 'rows="5"', $defaults['comment_field'] );

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return $defaults;

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}

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add_filter( 'comment_form_defaults', 'twenty_twenty_one_comment_form_defaults' );

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/**

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* Determines if post thumbnail can be displayed.

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* @since Twenty Twenty-One 1.0

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* @return bool

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function twenty_twenty_one_can_show_post_thumbnail() {

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return apply_filters(

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'twenty_twenty_one_can_show_post_thumbnail',

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! post_password_required() && ! is_attachment() && has_post_thumbnail()

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);

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}

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/**

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* Returns the size for avatars used in the theme.

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* @since Twenty Twenty-One 1.0

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* @return int

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function twenty_twenty_one_get_avatar_size() {

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return 60;

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}

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/**

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* Creates continue reading text

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function twenty_twenty_one_continue_reading_text() {

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$continue_reading = sprintf(

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/* translators: %s: Name of current post. */

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esc_html__( 'Continue reading %s', 'twentytwentyone' ),

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the_title( '<span class="screen-reader-text">', '</span>', false )

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);

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return $continue_reading;

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}

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/**

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* Create the continue reading link for excerpt.

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function twenty_twenty_one_continue_reading_link_excerpt() {

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if ( ! is_admin() ) {

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return '… <a class="more-link" href="' . esc_url( get_permalink() ) . '">' . twenty_twenty_one_continue_reading_text() . '</a>';

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}

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}

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// Filter the excerpt more link.

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add_filter( 'excerpt_more', 'twenty_twenty_one_continue_reading_link_excerpt' );

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/**

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* Create the continue reading link.

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function twenty_twenty_one_continue_reading_link() {

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if ( ! is_admin() ) {

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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>';

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}

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}

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// Filter the excerpt more link.

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add_filter( 'the_content_more_link', 'twenty_twenty_one_continue_reading_link' );

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if ( ! function_exists( 'twenty_twenty_one_post_title' ) ) {

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/**

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* Add a title to posts and pages that are missing titles.

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* @since Twenty Twenty-One 1.0

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* @param string $title The title.

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* @return string

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function twenty_twenty_one_post_title( $title ) {

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return '' === $title ? esc_html_x( 'Untitled', 'Added to posts and pages that are missing titles', 'twentytwentyone' ) : $title;

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}

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}

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add_filter( 'the_title', 'twenty_twenty_one_post_title' );

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/**

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* Gets the SVG code for a given icon.

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* @since Twenty Twenty-One 1.0

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* @param string $group The icon group.

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* @param string $icon The icon.

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* @param int $size The icon size in pixels.

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* @return string

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function twenty_twenty_one_get_icon_svg( $group, $icon, $size = 24 ) {

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return Twenty_Twenty_One_SVG_Icons::get_svg( $group, $icon, $size );

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}

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/**

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* Changes the default navigation arrows to svg icons

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* @param string $calendar_output The generated HTML of the calendar.

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* @return string

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function twenty_twenty_one_change_calendar_nav_arrows( $calendar_output ) {

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$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 );

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$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 );

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return $calendar_output;

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}

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add_filter( 'get_calendar', 'twenty_twenty_one_change_calendar_nav_arrows' );

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/**

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* Get custom CSS.

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* Return CSS for non-latin language, if available, or null

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* @param string $type Whether to return CSS for the "front-end", "block-editor" or "classic-editor".

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* @return string

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function twenty_twenty_one_get_non_latin_css( $type = 'front-end' ) {

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// Fetch site locale.

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$locale = get_bloginfo( 'language' );

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// Define fallback fonts for non-latin languages.

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$font_family = apply_filters(

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'twenty_twenty_one_get_localized_font_family_types',

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array(

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// Arabic.

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'ar' => array( 'Tahoma', 'Arial', 'sans-serif' ),

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'ary' => array( 'Tahoma', 'Arial', 'sans-serif' ),

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'azb' => array( 'Tahoma', 'Arial', 'sans-serif' ),

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'ckb' => array( 'Tahoma', 'Arial', 'sans-serif' ),

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'fa-IR' => array( 'Tahoma', 'Arial', 'sans-serif' ),

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'haz' => array( 'Tahoma', 'Arial', 'sans-serif' ),

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'ps' => array( 'Tahoma', 'Arial', 'sans-serif' ),

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// Chinese Simplified (China) - Noto Sans SC.

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'zh-CN' => array( '\'PingFang SC\'', '\'Helvetica Neue\'', '\'Microsoft YaHei New\'', '\'STHeiti Light\'', 'sans-serif' ),

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// Chinese Traditional (Taiwan) - Noto Sans TC.

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'zh-TW' => array( '\'PingFang TC\'', '\'Helvetica Neue\'', '\'Microsoft YaHei New\'', '\'STHeiti Light\'', 'sans-serif' ),

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// Chinese (Hong Kong) - Noto Sans HK.

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'zh-HK' => array( '\'PingFang HK\'', '\'Helvetica Neue\'', '\'Microsoft YaHei New\'', '\'STHeiti Light\'', 'sans-serif' ),

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// Cyrillic.

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'bel' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ),

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'bg-BG' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ),

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'kk' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ),

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'mk-MK' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ),

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'mn' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ),

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'ru-RU' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ),

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'sah' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ),

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'sr-RS' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ),

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'tt-RU' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ),

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'uk' => array( '\'Helvetica Neue\'', 'Helvetica', '\'Segoe UI\'', 'Arial', 'sans-serif' ),

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// Devanagari.

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'bn-BD' => array( 'Arial', 'sans-serif' ),

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'hi-IN' => array( 'Arial', 'sans-serif' ),

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'mr' => array( 'Arial', 'sans-serif' ),

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'ne-NP' => array( 'Arial', 'sans-serif' ),

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// Greek.

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'el' => array( '\'Helvetica Neue\', Helvetica, Arial, sans-serif' ),

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// Gujarati.

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'gu' => array( 'Arial', 'sans-serif' ),

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// Hebrew.

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'he-IL' => array( '\'Arial Hebrew\'', 'Arial', 'sans-serif' ),

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// Japanese.

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'ja' => array( 'sans-serif' ),

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// Korean.

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'ko-KR' => array( '\'Apple SD Gothic Neo\'', '\'Malgun Gothic\'', '\'Nanum Gothic\'', 'Dotum', 'sans-serif' ),

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// Thai.

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'th' => array( '\'Sukhumvit Set\'', '\'Helvetica Neue\'', 'Helvetica', 'Arial', 'sans-serif' ),

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// Vietnamese.

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'vi' => array( '\'Libre Franklin\'', 'sans-serif' ),

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)

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);

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// Return if the selected language has no fallback fonts.

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if ( empty( $font_family[ $locale ] ) ) {

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return '';

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}

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// Define elements to apply fallback fonts to.

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$elements = apply_filters(

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'twenty_twenty_one_get_localized_font_family_elements',

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array(

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'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' ),

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'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' ),

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'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' ),

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)

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);

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// Return if the specified type doesn't exist.

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if ( empty( $elements[ $type ] ) ) {

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return '';

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}

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// Include file if function doesn't exist.

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if ( ! function_exists( 'twenty_twenty_one_generate_css' ) ) {

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require_once get_theme_file_path( 'inc/custom-css.php' ); // phpcs:ignore WPThemeReview.CoreFunctionality.FileInclude.FileIncludeFound

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}

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// Return the specified styles.

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return twenty_twenty_one_generate_css( // @phpstan-ignore-line.

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implode( ',', $elements[ $type ] ),

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'font-family',

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implode( ',', $font_family[ $locale ] ),

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null,

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null,

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false

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);

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}

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/**

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* Print the first instance of a block in the content, and then break away.

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* @since Twenty Twenty-One 1.0

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* @param string $block_name The full block type name, or a partial match.

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* Example: `core/image`, `core-embed/*`.

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* @param string|null $content The content to search in. Use null for get_the_content().

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* @param int $instances How many instances of the block will be printed (max). Defaults to 1.

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* @return bool Returns true if a block was located & printed, otherwise false.

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function twenty_twenty_one_print_first_instance_of_block( $block_name, $content = null, $instances = 1 ) {

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$instances_count = 0;

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$blocks_content = '';

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if ( ! $content ) {

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$content = get_the_content();

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}

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// Parse blocks in the content.

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$blocks = parse_blocks( $content );

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// Loop blocks.

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foreach ( $blocks as $block ) {

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// Sanity check.

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if ( ! isset( $block['blockName'] ) ) {

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continue;

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}

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// Check if this the block matches the $block_name.

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$is_matching_block = false;

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// If the block ends with *, try to match the first portion.

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if ( '*' === $block_name[-1] ) {

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$is_matching_block = 0 === strpos( $block['blockName'], rtrim( $block_name, '*' ) );

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} else {

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$is_matching_block = $block_name === $block['blockName'];

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}

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if ( $is_matching_block ) {

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// Increment count.

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$instances_count++;

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// Add the block HTML.

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$blocks_content .= render_block( $block );

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// Break the loop if the $instances count was reached.

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if ( $instances_count >= $instances ) {

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break;

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}

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}

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}

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if ( $blocks_content ) {

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echo apply_filters( 'the_content', $blocks_content ); // phpcs:ignore WordPress.Security.EscapeOutput

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return true;

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}

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return false;

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}

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/**

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* Retrieve protected post password form content.

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* @since Twenty Twenty-One 1.0

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* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.

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* @return string HTML content for password form for password protected post.

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function twenty_twenty_one_password_form( $post = 0 ) {

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$post = get_post( $post );

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$label = 'pwbox-' . ( empty( $post->ID ) ? wp_rand() : $post->ID );

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$output = '<p class="post-password-message">' . esc_html__( 'This content is password protected. Please enter a password to view.', 'twentytwentyone' ) . '</p>

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<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>

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return $output;

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}

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add_filter( 'the_password_form', 'twenty_twenty_one_password_form' );

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/**

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* Filters the list of attachment image attributes.

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* @since Twenty Twenty-One 1.0

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* @param array $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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* @param WP_Post $attachment Image attachment post.

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* @param string|array $size Requested size. Image size or array of width and height values

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* (in that order). Default 'thumbnail'.

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* @return array

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function twenty_twenty_one_get_attachment_image_attributes( $attr, $attachment, $size ) {

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if ( isset( $attr['class'] ) && false !== strpos( $attr['class'], 'custom-logo' ) ) {

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return $attr;

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}

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$width = false;

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$height = false;

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if ( is_array( $size ) ) {

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$width = (int) $size[0];

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$height = (int) $size[1];

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} elseif ( $attachment && is_object( $attachment ) && $attachment->ID ) {

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$meta = wp_get_attachment_metadata( $attachment->ID );

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if ( $meta['width'] && $meta['height'] ) {

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$width = (int) $meta['width'];

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$height = (int) $meta['height'];

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}

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}

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if ( $width && $height ) {

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// Add style.

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$attr['style'] = isset( $attr['style'] ) ? $attr['style'] : '';

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$attr['style'] = 'width:100%;height:' . round( 100 * $height / $width, 2 ) . '%;max-width:' . $width . 'px;' . $attr['style'];

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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', 'twenty_twenty_one_get_attachment_image_attributes', 10, 3 );

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