File "functions.php"

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<?php
/**
 * Twenty Twenty functions and definitions
 *
 * @link https://developer.wordpress.org/themes/basics/theme-functions/
 *
 * @package WordPress
 * @subpackage Twenty_Twenty
 * @since Twenty Twenty 1.0
 */

/**
 * Table of Contents:
 * Theme Support
 * Required Files
 * Register Styles
 * Register Scripts
 * Register Menus
 * Custom Logo
 * WP Body Open
 * Register Sidebars
 * Enqueue Block Editor Assets
 * Enqueue Classic Editor Styles
 * Block Editor Settings
 */

/**
 * Sets up theme defaults and registers support for various WordPress features.
 *
 * Note that this function is hooked into the after_setup_theme hook, which
 * runs before the init hook. The init hook is too late for some features, such
 * as indicating support for post thumbnails.
 *
 * @since Twenty Twenty 1.0
 */
function twentytwenty_theme_support() {

	// Add default posts and comments RSS feed links to head.
	add_theme_support( 'automatic-feed-links' );

	// Custom background color.
	add_theme_support(
		'custom-background',
		array(
			'default-color' => 'f5efe0',
		)
	);

	// Set content-width.
	global $content_width;
	if ( ! isset( $content_width ) ) {
		$content_width = 580;
	}

	/*
	 * Enable support for Post Thumbnails on posts and pages.
	 *
	 * @link https://developer.wordpress.org/themes/functionality/featured-images-post-thumbnails/
	 */
	add_theme_support( 'post-thumbnails' );

	// Set post thumbnail size.
	set_post_thumbnail_size( 1200, 9999 );

	// Add custom image size used in Cover Template.
	add_image_size( 'twentytwenty-fullscreen', 1980, 9999 );

	// Custom logo.
	$logo_width  = 120;
	$logo_height = 90;

	// If the retina setting is active, double the recommended width and height.
	if ( get_theme_mod( 'retina_logo', false ) ) {
		$logo_width  = floor( $logo_width * 2 );
		$logo_height = floor( $logo_height * 2 );
	}

	add_theme_support(
		'custom-logo',
		array(
			'height'      => $logo_height,
			'width'       => $logo_width,
			'flex-height' => true,
			'flex-width'  => true,
		)
	);

	/*
	 * Let WordPress manage the document title.
	 * By adding theme support, we declare that this theme does not use a
	 * hard-coded <title> tag in the document head, and expect WordPress to
	 * provide it for us.
	 */
	add_theme_support( 'title-tag' );

	/*
	 * Switch default core markup for search form, comment form, and comments
	 * to output valid HTML5.
	 */
	add_theme_support(
		'html5',
		array(
			'search-form',
			'comment-form',
			'comment-list',
			'gallery',
			'caption',
			'script',
			'style',
			'navigation-widgets',
		)
	);

	/*
	 * Make theme available for translation.
	 * Translations can be filed in the /languages/ directory.
	 * If you're building a theme based on Twenty Twenty, use a find and replace
	 * to change 'twentytwenty' to the name of your theme in all the template files.
	 */
	load_theme_textdomain( 'twentytwenty' );

	// Add support for full and wide align images.
	add_theme_support( 'align-wide' );

	// Add support for responsive embeds.
	add_theme_support( 'responsive-embeds' );

	/*
	 * Adds starter content to highlight the theme on fresh sites.
	 * This is done conditionally to avoid loading the starter content on every
	 * page load, as it is a one-off operation only needed once in the customizer.
	 */
	if ( is_customize_preview() ) {
		require get_template_directory() . '/inc/starter-content.php';
		add_theme_support( 'starter-content', twentytwenty_get_starter_content() );
	}

	// Add theme support for selective refresh for widgets.
	add_theme_support( 'customize-selective-refresh-widgets' );

	/*
	 * Adds `async` and `defer` support for scripts registered or enqueued
	 * by the theme.
	 */
	$loader = new TwentyTwenty_Script_Loader();
	add_filter( 'script_loader_tag', array( $loader, 'filter_script_loader_tag' ), 10, 2 );

}

add_action( 'after_setup_theme', 'twentytwenty_theme_support' );

/**
 * REQUIRED FILES
 * Include required files.
 */
require get_template_directory() . '/inc/template-tags.php';

// Handle SVG icons.
require get_template_directory() . '/classes/class-twentytwenty-svg-icons.php';
require get_template_directory() . '/inc/svg-icons.php';

// Handle Customizer settings.
require get_template_directory() . '/classes/class-twentytwenty-customize.php';

// Require Separator Control class.
require get_template_directory() . '/classes/class-twentytwenty-separator-control.php';

// Custom comment walker.
require get_template_directory() . '/classes/class-twentytwenty-walker-comment.php';

// Custom page walker.
require get_template_directory() . '/classes/class-twentytwenty-walker-page.php';

// Custom script loader class.
require get_template_directory() . '/classes/class-twentytwenty-script-loader.php';

// Non-latin language handling.
require get_template_directory() . '/classes/class-twentytwenty-non-latin-languages.php';

// Custom CSS.
require get_template_directory() . '/inc/custom-css.php';

// Block Patterns.
require get_template_directory() . '/inc/block-patterns.php';

/**
 * Register and Enqueue Styles.
 *
 * @since Twenty Twenty 1.0
 */
function twentytwenty_register_styles() {

	$theme_version = wp_get_theme()->get( 'Version' );

	wp_enqueue_style( 'twentytwenty-style', get_stylesheet_uri(), array(), $theme_version );
	wp_style_add_data( 'twentytwenty-style', 'rtl', 'replace' );

	// Add output of Customizer settings as inline style.
	wp_add_inline_style( 'twentytwenty-style', twentytwenty_get_customizer_css( 'front-end' ) );

	// Add print CSS.
	wp_enqueue_style( 'twentytwenty-print-style', get_template_directory_uri() . '/print.css', null, $theme_version, 'print' );

}

add_action( 'wp_enqueue_scripts', 'twentytwenty_register_styles' );

/**
 * Register and Enqueue Scripts.
 *
 * @since Twenty Twenty 1.0
 */
function twentytwenty_register_scripts() {

	$theme_version = wp_get_theme()->get( 'Version' );

	if ( ( ! is_admin() ) && is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
		wp_enqueue_script( 'comment-reply' );
	}

	wp_enqueue_script( 'twentytwenty-js', get_template_directory_uri() . '/assets/js/index.js', array(), $theme_version, false );
	wp_script_add_data( 'twentytwenty-js', 'async', true );

}

add_action( 'wp_enqueue_scripts', 'twentytwenty_register_scripts' );

/**
 * Fix skip link focus in IE11.
 *
 * This does not enqueue the script because it is tiny and because it is only for IE11,
 * thus it does not warrant having an entire dedicated blocking script being loaded.
 *
 * @since Twenty Twenty 1.0
 *
 * @link https://git.io/vWdr2
 */
function twentytwenty_skip_link_focus_fix() {
	// The following is minified via `terser --compress --mangle -- assets/js/skip-link-focus-fix.js`.
	?>
	<script>
	/(trident|msie)/i.test(navigator.userAgent)&&document.getElementById&&window.addEventListener&&window.addEventListener("hashchange",function(){var t,e=location.hash.substring(1);/^[A-z0-9_-]+$/.test(e)&&(t=document.getElementById(e))&&(/^(?:a|select|input|button|textarea)$/i.test(t.tagName)||(t.tabIndex=-1),t.focus())},!1);
	</script>
	<?php
}
add_action( 'wp_print_footer_scripts', 'twentytwenty_skip_link_focus_fix' );

/**
 * Enqueue non-latin language styles.
 *
 * @since Twenty Twenty 1.0
 *
 * @return void
 */
function twentytwenty_non_latin_languages() {
	$custom_css = TwentyTwenty_Non_Latin_Languages::get_non_latin_css( 'front-end' );

	if ( $custom_css ) {
		wp_add_inline_style( 'twentytwenty-style', $custom_css );
	}
}

add_action( 'wp_enqueue_scripts', 'twentytwenty_non_latin_languages' );

/**
 * Register navigation menus uses wp_nav_menu in five places.
 *
 * @since Twenty Twenty 1.0
 */
function twentytwenty_menus() {

	$locations = array(
		'primary'  => __( 'Desktop Horizontal Menu', 'twentytwenty' ),
		'expanded' => __( 'Desktop Expanded Menu', 'twentytwenty' ),
		'mobile'   => __( 'Mobile Menu', 'twentytwenty' ),
		'footer'   => __( 'Footer Menu', 'twentytwenty' ),
		'social'   => __( 'Social Menu', 'twentytwenty' ),
	);

	register_nav_menus( $locations );
}

add_action( 'init', 'twentytwenty_menus' );

/**
 * Get the information about the logo.
 *
 * @since Twenty Twenty 1.0
 *
 * @param string $html The HTML output from get_custom_logo (core function).
 * @return string
 */
function twentytwenty_get_custom_logo( $html ) {

	$logo_id = get_theme_mod( 'custom_logo' );

	if ( ! $logo_id ) {
		return $html;
	}

	$logo = wp_get_attachment_image_src( $logo_id, 'full' );

	if ( $logo ) {
		// For clarity.
		$logo_width  = esc_attr( $logo[1] );
		$logo_height = esc_attr( $logo[2] );

		// If the retina logo setting is active, reduce the width/height by half.
		if ( get_theme_mod( 'retina_logo', false ) ) {
			$logo_width  = floor( $logo_width / 2 );
			$logo_height = floor( $logo_height / 2 );

			$search = array(
				'/width=\"\d+\"/iU',
				'/height=\"\d+\"/iU',
			);

			$replace = array(
				"width=\"{$logo_width}\"",
				"height=\"{$logo_height}\"",
			);

			// Add a style attribute with the height, or append the height to the style attribute if the style attribute already exists.
			if ( strpos( $html, ' style=' ) === false ) {
				$search[]  = '/(src=)/';
				$replace[] = "style=\"height: {$logo_height}px;\" src=";
			} else {
				$search[]  = '/(style="[^"]*)/';
				$replace[] = "$1 height: {$logo_height}px;";
			}

			$html = preg_replace( $search, $replace, $html );

		}
	}

	return $html;

}

add_filter( 'get_custom_logo', 'twentytwenty_get_custom_logo' );

if ( ! function_exists( 'wp_body_open' ) ) {

	/**
	 * Shim for wp_body_open, ensuring backward compatibility with versions of WordPress older than 5.2.
	 *
	 * @since Twenty Twenty 1.0
	 */
	function wp_body_open() {
		/** This action is documented in wp-includes/general-template.php */
		do_action( 'wp_body_open' );
	}
}

/**
 * Include a skip to content link at the top of the page so that users can bypass the menu.
 *
 * @since Twenty Twenty 1.0
 */
function twentytwenty_skip_link() {
	echo '<a class="skip-link screen-reader-text" href="#site-content">' . __( 'Skip to the content', 'twentytwenty' ) . '</a>';
}

add_action( 'wp_body_open', 'twentytwenty_skip_link', 5 );

/**
 * Register widget areas.
 *
 * @since Twenty Twenty 1.0
 *
 * @link https://developer.wordpress.org/themes/functionality/sidebars/#registering-a-sidebar
 */
function twentytwenty_sidebar_registration() {

	// Arguments used in all register_sidebar() calls.
	$shared_args = array(
		'before_title'  => '<h2 class="widget-title subheading heading-size-3">',
		'after_title'   => '</h2>',
		'before_widget' => '<div class="widget %2$s"><div class="widget-content">',
		'after_widget'  => '</div></div>',
	);

	// Footer #1.
	register_sidebar(
		array_merge(
			$shared_args,
			array(
				'name'        => __( 'Footer #1', 'twentytwenty' ),
				'id'          => 'sidebar-1',
				'description' => __( 'Widgets in this area will be displayed in the first column in the footer.', 'twentytwenty' ),
			)
		)
	);

	// Footer #2.
	register_sidebar(
		array_merge(
			$shared_args,
			array(
				'name'        => __( 'Footer #2', 'twentytwenty' ),
				'id'          => 'sidebar-2',
				'description' => __( 'Widgets in this area will be displayed in the second column in the footer.', 'twentytwenty' ),
			)
		)
	);

}

add_action( 'widgets_init', 'twentytwenty_sidebar_registration' );

/**
 * Enqueue supplemental block editor styles.
 *
 * @since Twenty Twenty 1.0
 */
function twentytwenty_block_editor_styles() {

	// Enqueue the editor styles.
	wp_enqueue_style( 'twentytwenty-block-editor-styles', get_theme_file_uri( '/assets/css/editor-style-block.css' ), array(), wp_get_theme()->get( 'Version' ), 'all' );
	wp_style_add_data( 'twentytwenty-block-editor-styles', 'rtl', 'replace' );

	// Add inline style from the Customizer.
	wp_add_inline_style( 'twentytwenty-block-editor-styles', twentytwenty_get_customizer_css( 'block-editor' ) );

	// Add inline style for non-latin fonts.
	wp_add_inline_style( 'twentytwenty-block-editor-styles', TwentyTwenty_Non_Latin_Languages::get_non_latin_css( 'block-editor' ) );

	// Enqueue the editor script.
	wp_enqueue_script( 'twentytwenty-block-editor-script', get_theme_file_uri( '/assets/js/editor-script-block.js' ), array( 'wp-blocks', 'wp-dom' ), wp_get_theme()->get( 'Version' ), true );
}

add_action( 'enqueue_block_edi