WordPress/wp-content/themes/twentyfourteen/functions.php

<?php
/**
 * Twenty Fourteen functions and definitions
 *
 * Set up the theme and provides some helper functions, which are used in the
 * theme as custom template tags. Others are attached to action and filter
 * hooks in WordPress to change core functionality.
 *
 * When using a child theme you can override certain functions (those wrapped
 * in a function_exists() call) by defining them first in your child theme's
 * functions.php file. The child theme's functions.php file is included before
 * the parent theme's file, so the child theme functions would be used.
 *
 * @link https://developer.wordpress.org/themes/basics/theme-functions/
 * @link https://developer.wordpress.org/themes/advanced-topics/child-themes/
 *
 * Functions that are not pluggable (not wrapped in function_exists()) are
 * instead attached to a filter or action hook.
 *
 * For more information on hooks, actions, and filters,
 * @link https://developer.wordpress.org/plugins/
 *
 * @package WordPress
 * @subpackage Twenty_Fourteen
 * @since Twenty Fourteen 1.0
 */

/**
 * Set up the content width value based on the theme's design.
 *
 * @see twentyfourteen_content_width()
 *
 * @since Twenty Fourteen 1.0
 */
if ( ! isset( $content_width ) ) {
	$content_width = 474;
}

/**
 * Twenty Fourteen only works in WordPress 3.6 or later.
 */
if ( version_compare( $GLOBALS['wp_version'], '3.6', '<' ) ) {
	require get_template_directory() . '/inc/back-compat.php';
}

if ( ! function_exists( 'twentyfourteen_setup' ) ) :
	/**
	 * Twenty Fourteen setup.
	 *
	 * Set 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 post thumbnails.
	 *
	 * @since Twenty Fourteen 1.0
	 */
	function twentyfourteen_setup() {

		/*
		 * Make Twenty Fourteen available for translation.
		 *
		 * Translations can be filed at WordPress.org. See: https://translate.wordpress.org/projects/wp-themes/twentyfourteen
		 * If you're building a theme based on Twenty Fourteen, use a find and
		 * replace to change 'twentyfourteen' to the name of your theme in all
		 * template files.
		 *
		 * Manual loading of text domain is not required after the introduction of
		 * just in time translation loading in WordPress version 4.6.
		 *
		 * @ticket 58318
		 */
		if ( version_compare( $GLOBALS['wp_version'], '4.6', '<' ) ) {
			load_theme_textdomain( 'twentyfourteen' );
		}

		/*
		 * This theme styles the visual editor to resemble the theme style.
		 * When fonts are self-hosted, the theme directory needs to be removed first.
		 */
		$font_stylesheet = str_replace(
			array( get_template_directory_uri() . '/', get_stylesheet_directory_uri() . '/' ),
			'',
			twentyfourteen_font_url()
		);
		add_editor_style( array( 'css/editor-style.css', $font_stylesheet, 'genericons/genericons.css' ) );

		// Load regular editor styles into the new block-based editor.
		add_theme_support( 'editor-styles' );

		// Load default block styles.
		add_theme_support( 'wp-block-styles' );

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

		// Add support for custom color scheme.
		add_theme_support(
			'editor-color-palette',
			array(
				array(
					'name'  => __( 'Green', 'twentyfourteen' ),
					'slug'  => 'green',
					'color' => '#24890d',
				),
				array(
					'name'  => __( 'Black', 'twentyfourteen' ),
					'slug'  => 'black',
					'color' => '#000',
				),
				array(
					'name'  => __( 'Dark Gray', 'twentyfourteen' ),
					'slug'  => 'dark-gray',
					'color' => '#2b2b2b',
				),
				array(
					'name'  => __( 'Medium Gray', 'twentyfourteen' ),
					'slug'  => 'medium-gray',
					'color' => '#767676',
				),
				array(
					'name'  => __( 'Light Gray', 'twentyfourteen' ),
					'slug'  => 'light-gray',
					'color' => '#f5f5f5',
				),
				array(
					'name'  => __( 'White', 'twentyfourteen' ),
					'slug'  => 'white',
					'color' => '#fff',
				),
			)
		);

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

		// Enable support for Post Thumbnails, and declare two sizes.
		add_theme_support( 'post-thumbnails' );
		set_post_thumbnail_size( 672, 372, true );
		add_image_size( 'twentyfourteen-full-width', 1038, 576, true );

		// This theme uses wp_nav_menu() in two locations.
		register_nav_menus(
			array(
				'primary'   => __( 'Top primary menu', 'twentyfourteen' ),
				'secondary' => __( 'Secondary menu in left sidebar', 'twentyfourteen' ),
			)
		);

		/*
		 * 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',
			)
		);

		/*
		 * Enable support for Post Formats.
		 * See https://wordpress.org/documentation/article/post-formats/
		 */
		add_theme_support(
			'post-formats',
			array(
				'aside',
				'image',
				'video',
				'audio',
				'quote',
				'link',
				'gallery',
			)
		);

		// This theme allows users to set a custom background.
		add_theme_support(
			'custom-background',
			/**
			 * Filters Twenty Fourteen custom-background support arguments.
			 *
			 * @since Twenty Fourteen 1.0
			 *
			 * @param array $args {
			 *     An array of custom-background support arguments.
			 *
			 *     @type string $default-color Default color of the background.
			 * }
			 */
			apply_filters(
				'twentyfourteen_custom_background_args',
				array(
					'default-color' => 'f5f5f5',
				)
			)
		);

		// Add support for featured content.
		add_theme_support(
			'featured-content',
			array(
				'featured_content_filter' => 'twentyfourteen_get_featured_posts',
				'max_posts'               => 6,
			)
		);

		// This theme uses its own gallery styles.
		add_filter( 'use_default_gallery_style', '__return_false' );

		// Indicate widget sidebars can use selective refresh in the Customizer.
		add_theme_support( 'customize-selective-refresh-widgets' );
	}
endif; // twentyfourteen_setup()
add_action( 'after_setup_theme', 'twentyfourteen_setup' );

/**
 * Adjust content_width value for image attachment template.
 *
 * @since Twenty Fourteen 1.0
 */
function twentyfourteen_content_width() {
	if ( is_attachment() && wp_attachment_is_image() ) {
		$GLOBALS['content_width'] = 810;
	}
}
add_action( 'template_redirect', 'twentyfourteen_content_width' );

/**
 * Getter function for Featured Content Plugin.
 *
 * @since Twenty Fourteen 1.0
 *
 * @return array An array of WP_Post objects.
 */
function twentyfourteen_get_featured_posts() {
	/**
	 * Filters the featured posts to return in Twenty Fourteen.
	 *
	 * @since Twenty Fourteen 1.0
	 *
	 * @param array|bool $posts Array of featured posts, otherwise false.
	 */
	return apply_filters( 'twentyfourteen_get_featured_posts', array() );
}

/**
 * A helper conditional function that returns a boolean value.
 *
 * @since Twenty Fourteen 1.0
 *
 * @return bool Whether there are featured posts.
 */
function twentyfourteen_has_featured_posts() {
	return ! is_paged() && (bool) twentyfourteen_get_featured_posts();
}

/**
 * Register three Twenty Fourteen widget areas.
 *
 * @since Twenty Fourteen 1.0
 */
function twentyfourteen_widgets_init() {
	require get_template_directory() . '/inc/widgets.php';
	register_widget( 'Twenty_Fourteen_Ephemera_Widget' );

	register_sidebar(
		array(
			'name'          => __( 'Primary Sidebar', 'twentyfourteen' ),
			'id'            => 'sidebar-1',
			'description'   => __( 'Main sidebar that appears on the left.', 'twentyfourteen' ),
			'before_widget' => '<aside id="%1$s" class="widget %2$s">',
			'after_widget'  => '</aside>',
			'before_title'  => '<h1 class="widget-title">',
			'after_title'   => '</h1>',
		)
	);
	register_sidebar(
		array(
			'name'          => __( 'Content Sidebar', 'twentyfourteen' ),
			'id'            => 'sidebar-2',
			'description'   => __( 'Additional sidebar that appears on the right.', 'twentyfourteen' ),
			'before_widget' => '<aside id="%1$s" class="widget %2$s">',
			'after_widget'  => '</aside>',
			'before_title'  => '<h1 class="widget-title">',
			'after_title'   => '</h1>',
		)
	);
	register_sidebar(
		array(
			'name'          => __( 'Footer Widget Area', 'twentyfourteen' ),
			'id'            => 'sidebar-3',
			'description'   => __( 'Appears in the footer section of the site.', 'twentyfourteen' ),
			'before_widget' => '<aside id="%1$s" class="widget %2$s">',
			'after_widget'  => '</aside>',
			'before_title'  => '<h1 class="widget-title">',
			'after_title'   => '</h1>',
		)
	);
}
add_action( 'widgets_init', 'twentyfourteen_widgets_init' );

if ( ! function_exists( 'twentyfourteen_font_url' ) ) :
	/**
	 * Register Lato font for Twenty Fourteen.
	 *
	 * @since Twenty Fourteen 1.0
	 * @since Twenty Fourteen 3.6 Replaced Google URL with self-hosted fonts.
	 *
	 * @return string
	 */
	function twentyfourteen_font_url() {
		$font_url = '';
		/*
		 * translators: If there are characters in your language that are not supported
		 * by Lato, translate this to 'off'. Do not translate into your own language.
		 */
		if ( 'off' !== _x( 'on', 'Lato font: on or off', 'twentyfourteen' ) ) {
			$font_url = get_template_directory_uri() . '/fonts/font-lato.css';
		}

		return $font_url;
	}
endif;

/**
 * Enqueue scripts and styles for the front end.
 *
 * @since Twenty Fourteen 1.0
 */
function twentyfourteen_scripts() {
	// Add Lato font, used in the main stylesheet.
	$font_version = ( 0 === strpos( (string) twentyfourteen_font_url(), get_template_directory_uri() . '/' ) ) ? '20230328' : null;
	wp_enqueue_style( 'twentyfourteen-lato', twentyfourteen_font_url(), array(), $font_version );

	// Add Genericons font, used in the main stylesheet.
	wp_enqueue_style( 'genericons', get_template_directory_uri() . '/genericons/genericons.css', array(), '3.0.3' );

	// Load our main stylesheet.
	wp_enqueue_style( 'twentyfourteen-style', get_stylesheet_uri(), array(), '20230328' );

	// Theme block stylesheet.
	wp_enqueue_style( 'twentyfourteen-block-style', get_template_directory_uri() . '/css/blocks.css', array( 'twentyfourteen-style' ), '20230206' );

	// Load the Internet Explorer specific stylesheet.
	wp_enqueue_style( 'twentyfourteen-ie', get_template_directory_uri() . '/css/ie.css', array( 'twentyfourteen-style' ), '20140711' );
	wp_style_add_data( 'twentyfourteen-ie', 'conditional', 'lt IE 9' );

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

	if ( is_singular() && wp_attachment_is_image() ) {
		wp_enqueue_script( 'twentyfourteen-keyboard-image-navigation', get_template_directory_uri() . '/js/keyboard-image-navigation.js', array( 'jquery' ), '20150120' );
	}

	if ( is_active_sidebar( 'sidebar-3' ) ) {
		wp_enqueue_script( 'jquery-masonry' );
	}

	if ( is_front_page() && 'slider' === get_theme_mod( 'featured_content_layout' ) ) {
		wp_enqueue_script( 'twentyfourteen-slider', get_template_directory_uri() . '/js/slider.js', array( 'jquery' ), '20150120', true );
		wp_localize_script(
			'twentyfourteen-slider',
			'featuredSliderDefaults',
			array(
				'prevText' => __( 'Previous', 'twentyfourteen' ),
				'nextText' => __( 'Next', 'twentyfourteen' ),
			)
		);
	}

	wp_enqueue_script( 'twentyfourteen-script', get_template_directory_uri() . '/js/functions.js', array( 'jquery' ), '20230526', true );
}
add_action( 'wp_enqueue_scripts', 'twentyfourteen_scripts' );

/**
 * Enqueue font stylesheet to admin screen for custom header display.
 *
 * @since Twenty Fourteen 1.0
 */
function twentyfourteen_admin_fonts() {
	$font_version = ( 0 === strpos( (string) twentyfourteen_font_url(), get_template_directory_uri() . '/' ) ) ? '20230328' : null;
	wp_enqueue_style( 'twentyfourteen-lato', twentyfourteen_font_url(), array(), $font_version );
}
add_action( 'admin_print_scripts-appearance_page_custom-header', 'twentyfourteen_admin_fonts' );

/**
 * Add preconnect for Google Fonts.
 *
 * @since Twenty Fourteen 1.9
 * @deprecated Twenty Fourteen 3.6 Disabled filter because, by default, fonts are self-hosted.
 *
 * @param array   $urls          URLs to print for resource hints.
 * @param string  $relation_type The relation type the URLs are printed.
 * @return array URLs to print for resource hints.
 */
function twentyfourteen_resource_hints( $urls, $relation_type ) {
	if ( wp_style_is( 'twentyfourteen-lato', 'queue' ) && 'preconnect' === $relation_type ) {
		if ( version_compare( $GLOBALS['wp_version'], '4.7-alpha', '>=' ) ) {
			$urls[] = array(
				'href' => 'https://fonts.gstatic.com',
				'crossorigin',
			);
		} else {
			$urls[] = 'https://fonts.gstatic.com';
		}
	}

	return $urls;
}
// add_filter( 'wp_resource_hints', 'twentyfourteen_resource_hints', 10, 2 );

/**
 * Enqueue styles for the block-based editor.
 *
 * @since Twenty Fourteen 2.3
 */
function twentyfourteen_block_editor_styles() {
	// Block styles.
	wp_enqueue_style( 'twentyfourteen-block-editor-style', get_template_directory_uri() . '/css/editor-blocks.css', array(), '20230206' );
	// Add custom fonts.
	$font_version = ( 0 === strpos( (string) twentyfourteen_font_url(), get_template_directory_uri() . '/' ) ) ? '20230328' : null;
	wp_enqueue_style( 'twentyfourteen-fonts', twentyfourteen_font_url(), array(), $font_version );
}
add_action( 'enqueue_block_editor_assets', 'twentyfourteen_block_editor_styles' );

if ( ! function_exists( 'twentyfourteen_the_attached_image' ) ) :
	/**
	 * Print the attached image with a link to the next attached image.
	 *
	 * @since Twenty Fourteen 1.0
	 */
	function twentyfourteen_the_attached_image() {
		$post = get_post();
		/**
		 * Filters the default Twenty Fourteen attachment size.
		 *
		 * @since Twenty Fourteen 1.0
		 *
		 * @param array $dimensions {
		 *     An array of height and width dimensions.
		 *
		 *     @type int $height Height of the image in pixels. Default 810.
		 *     @type int $width  Width of the image in pixels. Default 810.
		 * }
		 */
		$attachment_size     = apply_filters( 'twentyfourteen_attachment_size', array( 810, 810 ) );
		$next_attachment_url = wp_get_attachment_url();

		/*
		 * Grab the IDs of all the image attachments in a gallery so we can get the URL
		 * of the next adjacent image in a gallery, or the first image (if we're
		 * looking at the last image in a gallery), or, in a gallery of one, just the
		 * link to that image file.
		 */
		$attachment_ids = get_posts(
			array(
				'post_parent'    => $post->post_parent,
				'fields'         => 'ids',
				'numberposts'    => -1,
				'post_status'    => 'inherit',
				'post_type'      => 'attachment',
				'post_mime_type' => 'image',
				'order'          => 'ASC',
				'orderby'        => 'menu_order ID',
			)
		);

		// If there is more than 1 attachment in a gallery...
		if ( count( $attachment_ids ) > 1 ) {
			foreach ( $attachment_ids as $idx => $attachment_id ) {
				if ( $attachment_id === $post->ID ) {
					$next_id = $attachment_ids[ ( $idx + 1 ) % count( $attachment_ids ) ];
					break;
				}
			}

			if ( $next_id ) {
				// ...get the URL of the next image attachment.
				$next_attachment_url = get_attachment_link( $next_id );
			} else {
				// ...or get the URL of the first image attachment.
				$next_attachment_url = get_attachment_link( reset( $attachment_ids ) );
			}
		}

		printf(
			'<a href="%1$s" rel="attachment">%2$s</a>',
			esc_url( $next_attachment_url ),
			wp_get_attachment_image( $post->ID, $attachment_size )
		);
	}
endif;

if ( ! function_exists( 'twentyfourteen_list_authors' ) ) :
	/**
	 * Print a list of all site contributors who published at least one post.
	 *
	 * @since Twenty Fourteen 1.0
	 */
	function twentyfourteen_list_authors() {
		$args = array(
			'fields'     => 'ID',
			'orderby'    => 'post_count',
			'order'      => 'DESC',
			'capability' => array( 'edit_posts' ),
		);

		// Capability queries were only introduced in WP 5.9.
		if ( version_compare( $GLOBALS['wp_version'], '5.9-alpha', '<' ) ) {
			$args['who'] = 'authors';
			unset( $args['capability'] );
		}

		/**
		 * Filters query arguments for listing authors.
		 *
		 * @since 3.3
		 *
		 * @param array $args Query arguments.
		 */
		$args = apply_filters( 'twentyfourteen_list_authors_query_args', $args );

		$contributor_ids = get_users( $args );

		foreach ( $contributor_ids as $contributor_id ) :
			$post_count = count_user_posts( $contributor_id );

			// Move on if user has not published a post (yet).
			if ( ! $post_count ) {
				continue;
			}
			?>

		<div class="contributor">
		<div class="contributor-info">
			<div class="contributor-avatar"><?php echo get_avatar( $contributor_id, 132 ); ?></div>
			<div class="contributor-summary">
				<h2 class="contributor-name"><?php echo get_the_author_meta( 'display_name', $contributor_id ); ?></h2>
				<p class="contributor-bio">
					<?php echo get_the_author_meta( 'description', $contributor_id ); ?>
				</p>
				<a class="button contributor-posts-link" href="<?php echo esc_url( get_author_posts_url( $contributor_id ) ); ?>">
					<?php
					/* translators: %d: Post count. */
					printf( _n( '%d Article', '%d Articles', $post_count, 'twentyfourteen' ), $post_count );
					?>
				</a>
			</div><!-- .contributor-summary -->
		</div><!-- .contributor-info -->
	</div><!-- .contributor -->

			<?php
	endforeach;
	}
endif;

/**
 * Extend the default WordPress body classes.
 *
 * Adds body classes to denote:
 * 1. Single or multiple authors.
 * 2. Presence of header image except in Multisite signup and activate pages.
 * 3. Index views.
 * 4. Full-width content layout.
 * 5. Presence of footer widgets.
 * 6. Single views.
 * 7. Featured content layout.
 *
 * @since Twenty Fourteen 1.0
 *
 * @param array $classes A list of existing body class values.
 * @return array The filtered body class list.
 */
function twentyfourteen_body_classes( $classes ) {
	if ( is_multi_author() ) {
		$classes[] = 'group-blog';
	}

	if ( get_header_image() ) {
		$classes[] = 'header-image';
	} elseif ( ! in_array( $GLOBALS['pagenow'], array( 'wp-activate.php', 'wp-signup.php' ), true ) ) {
		$classes[] = 'masthead-fixed';
	}

	if ( is_archive() || is_search() || is_home() ) {
		$classes[] = 'list-view';
	}

	if ( ( ! is_active_sidebar( 'sidebar-2' ) )
		|| is_page_template( 'page-templates/full-width.php' )
		|| is_page_template( 'page-templates/contributors.php' )
		|| is_attachment() ) {
		$classes[] = 'full-width';
	}

	if ( is_active_sidebar( 'sidebar-3' ) ) {
		$classes[] = 'footer-widgets';
	}

	if ( is_singular() && ! is_front_page() ) {
		$classes[] = 'singular';
	}

	if ( is_front_page() && 'slider' === get_theme_mod( 'featured_content_layout' ) ) {
		$classes[] = 'slider';
	} elseif ( is_front_page() ) {
		$classes[] = 'grid';
	}

	return $classes;
}
add_filter( 'body_class', 'twentyfourteen_body_classes' );

/**
 * Extend the default WordPress post classes.
 *
 * Adds a post class to denote:
 * Non-password protected page with a post thumbnail.
 *
 * @since Twenty Fourteen 1.0
 *
 * @param array $classes A list of existing post class values.
 * @return array The filtered post class list.
 */
function twentyfourteen_post_classes( $classes ) {
	if ( ! post_password_required() && ! is_attachment() && has_post_thumbnail() ) {
		$classes[] = 'has-post-thumbnail';
	}

	return $classes;
}
add_filter( 'post_class', 'twentyfourteen_post_classes' );

/**
 * Create a nicely formatted and more specific title element text for output
 * in head of document, based on current view.
 *
 * @since Twenty Fourteen 1.0
 *
 * @global int $paged WordPress archive pagination page count.
 * @global int $page  WordPress paginated post page count.
 *
 * @param string $title Default title text for current view.
 * @param string $sep Optional separator.
 * @return string The filtered title.
 */
function twentyfourteen_wp_title( $title, $sep ) {
	global $paged, $page;

	if ( is_feed() ) {
		return $title;
	}

	// Add the site name.
	$title .= get_bloginfo( 'name', 'display' );

	// Add the site description for the home/front page.
	$site_description = get_bloginfo( 'description', 'display' );
	if ( $site_description && ( is_home() || is_front_page() ) ) {
		$title = "$title $sep $site_description";
	}

	// Add a page number if necessary.
	if ( ( $paged >= 2 || $page >= 2 ) && ! is_404() ) {
		/* translators: %s: Page number. */
		$title = "$title $sep " . sprintf( __( 'Page %s', 'twentyfourteen' ), max( $paged, $page ) );
	}

	return $title;
}
add_filter( 'wp_title', 'twentyfourteen_wp_title', 10, 2 );


/**
 * Modifies tag cloud widget arguments to display all tags in the same font size
 * and use list format for better accessibility.
 *
 * @since Twenty Fourteen 2.1
 *
 * @param array $args Arguments for tag cloud widget.
 * @return array The filtered arguments for tag cloud widget.
 */
function twentyfourteen_widget_tag_cloud_args( $args ) {
	$args['largest']  = 22;
	$args['smallest'] = 8;
	$args['unit']     = 'pt';
	$args['format']   = 'list';

	return $args;
}
add_filter( 'widget_tag_cloud_args', 'twentyfourteen_widget_tag_cloud_args' );


// Implement Custom Header features.
require get_template_directory() . '/inc/custom-header.php';

// Custom template tags for this theme.
require get_template_directory() . '/inc/template-tags.php';

// Add Customizer functionality.
require get_template_directory() . '/inc/customizer.php';

// Add support for block patterns.
require get_template_directory() . '/inc/block-patterns.php';

/*
 * Add Featured Content functionality.
 *
 * To overwrite in a plugin, define your own Featured_Content class on or
 * before the 'setup_theme' hook.
 */
if ( ! class_exists( 'Featured_Content' ) && 'plugins.php' !== $GLOBALS['pagenow'] ) {
	require get_template_directory() . '/inc/featured-content.php';
}

/**
 * Add an `is_customize_preview` function if it is missing.
 *
 * Enables installing Twenty Fourteen in WordPress versions before 4.0.0 when the
 * `is_customize_preview` function was introduced.
 *
 * @global WP_Customize_Manager $wp_customize Customizer object.
 */
if ( ! function_exists( 'is_customize_preview' ) ) :
	function is_customize_preview() {
		global $wp_customize;

		return ( $wp_customize instanceof WP_Customize_Manager ) && $wp_customize->is_preview();
	}
endif;