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<?php
/**
* Twenty Seventeen functions and definitions
*
* @link https://developer.wordpress.org/themes/basics/theme-functions/
*
* @package WordPress
* @subpackage Twenty_Seventeen
* @since Twenty Seventeen 1.0
*/
/**
* Twenty Seventeen only works in WordPress 4.7 or later.
*/
if ( version_compare( $GLOBALS['wp_version'], '4.7-alpha', '<' ) ) {
require get_template_directory() . '/inc/back-compat.php';
return;
}
/**
* 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.
*/
function twentyseventeen_setup() {
/*
* Make theme available for translation.
* Translations can be filed at WordPress.org. See: https://translate.wordpress.org/projects/wp-themes/twentyseventeen
* If you're building a theme based on Twenty Seventeen, use a find and replace
* to change 'twentyseventeen' to the name of your theme in all the template files.
*/
load_theme_textdomain( 'twentyseventeen' );
// Add default posts and comments RSS feed links to head.
add_theme_support( 'automatic-feed-links' );
/*
* 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' );
/*
* Enables custom line height for blocks
*/
add_theme_support( 'custom-line-height' );
/*
* 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' );
add_image_size( 'twentyseventeen-featured-image', 2000, 1200, true );
add_image_size( 'twentyseventeen-thumbnail-avatar', 100, 100, true );
// Set the default content width.
$GLOBALS['content_width'] = 525;
// This theme uses wp_nav_menu() in two locations.
register_nav_menus(
array(
'top' => __( 'Top Menu', 'twentyseventeen' ),
'social' => __( 'Social Links Menu', 'twentyseventeen' ),
)
);
/*
* Switch default core markup for search form, comment form, and comments
* to output valid HTML5.
*/
add_theme_support(
'html5',
array(
'comment-form',
'comment-list',
'gallery',
'caption',
'script',
'style',
'navigation-widgets',
)
);
/*
* Enable support for Post Formats.
*
* See: https://wordpress.org/support/article/post-formats/
*/
add_theme_support(
'post-formats',
array(
'aside',
'image',
'video',
'quote',
'link',
'gallery',
'audio',
)
);
// Add theme support for Custom Logo.
add_theme_support(
'custom-logo',
array(
'width' => 250,
'height' => 250,
'flex-width' => true,
)
);
// Add theme support for selective refresh for widgets.
add_theme_support( 'customize-selective-refresh-widgets' );
/*
* This theme styles the visual editor to resemble the theme style,
* specifically font, colors, and column width.
*/
add_editor_style( array( 'assets/css/editor-style.css', twentyseventeen_fonts_url() ) );
// 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' );
// Define and register starter content to showcase the theme on new sites.
$starter_content = array(
'widgets' => array(
// Place three core-defined widgets in the sidebar area.
'sidebar-1' => array(
'text_business_info',
'search',
'text_about',
),
// Add the core-defined business info widget to the footer 1 area.
'sidebar-2' => array(
'text_business_info',
),
// Put two core-defined widgets in the footer 2 area.
'sidebar-3' => array(
'text_about',
'search',
),
),
// Specify the core-defined pages to create and add custom thumbnails to some of them.
'posts' => array(
'home',
'about' => array(
'thumbnail' => '{{image-sandwich}}',
),
'contact' => array(
'thumbnail' => '{{image-espresso}}',
),
'blog' => array(
'thumbnail' => '{{image-coffee}}',
),
'homepage-section' => array(
'thumbnail' => '{{image-espresso}}',
),
),
// Create the custom image attachments used as post thumbnails for pages.
'attachments' => array(
'image-espresso' => array(
'post_title' => _x( 'Espresso', 'Theme starter content', 'twentyseventeen' ),
'file' => 'assets/images/espresso.jpg', // URL relative to the template directory.
),
'image-sandwich' => array(
'post_title' => _x( 'Sandwich', 'Theme starter content', 'twentyseventeen' ),
'file' => 'assets/images/sandwich.jpg',
),
'image-coffee' => array(
'post_title' => _x( 'Coffee', 'Theme starter content', 'twentyseventeen' ),
'file' => 'assets/images/coffee.jpg',
),
),
// Default to a static front page and assign the front and posts pages.
'options' => array(
'show_on_front' => 'page',
'page_on_front' => '{{home}}',
'page_for_posts' => '{{blog}}',
),
// Set the front page section theme mods to the IDs of the core-registered pages.
'theme_mods' => array(
'panel_1' => '{{homepage-section}}',
'panel_2' => '{{about}}',
'panel_3' => '{{blog}}',
'panel_4' => '{{contact}}',
),
// Set up nav menus for each of the two areas registered in the theme.
'nav_menus' => array(
// Assign a menu to the "top" location.
'top' => array(
'name' => __( 'Top Menu', 'twentyseventeen' ),
'items' => array(
'link_home', // Note that the core "home" page is actually a link in case a static front page is not used.
'page_about',
'page_blog',
'page_contact',
),
),
// Assign a menu to the "social" location.
'social' => array(
'name' => __( 'Social Links Menu', 'twentyseventeen' ),
'items' => array(
'link_yelp',
'link_facebook',
'link_twitter',
'link_instagram',
'link_email',
),
),
),
);
/**
* Filters Twenty Seventeen array of starter content.
*
* @since Twenty Seventeen 1.1
*
* @param array $starter_content Array of starter content.
*/
$starter_content = apply_filters( 'twentyseventeen_starter_content', $starter_content );
add_theme_support( 'starter-content', $starter_content );
}
add_action( 'after_setup_theme', 'twentyseventeen_setup' );
/**
* Set the content width in pixels, based on the theme's design and stylesheet.
*
* Priority 0 to make it available to lower priority callbacks.
*
* @global int $content_width
*/
function twentyseventeen_content_width() {
$content_width = $GLOBALS['content_width'];
// Get layout.
$page_layout = get_theme_mod( 'page_layout' );
// Check if layout is one column.
if ( 'one-column' === $page_layout ) {
if ( twentyseventeen_is_frontpage() ) {
$content_width = 644;
} elseif ( is_page() ) {
$content_width = 740;
}
}
// Check if is single post and there is no sidebar.
if ( is_single() && ! is_active_sidebar( 'sidebar-1' ) ) {
$content_width = 740;
}
/**
* Filters Twenty Seventeen content width of the theme.
*
* @since Twenty Seventeen 1.0
*
* @param int $content_width Content width in pixels.
*/
$GLOBALS['content_width'] = apply_filters( 'twentyseventeen_content_width', $content_width );
}
add_action( 'template_redirect', 'twentyseventeen_content_width', 0 );
/**
* Register custom fonts.
*/
function twentyseventeen_fonts_url() {
$fonts_url = '';
/*
* translators: If there are characters in your language that are not supported
* by Libre Franklin, translate this to 'off'. Do not translate into your own language.
*/
$libre_franklin = _x( 'on', 'Libre Franklin font: on or off', 'twentyseventeen' );
if ( 'off' !== $libre_franklin ) {
$font_families = array();
$font_families[] = 'Libre Franklin:300,300i,400,400i,600,600i,800,800i';
$query_args = array(
'family' => urlencode( implode( '|', $font_families ) ),
'subset' => urlencode( 'latin,latin-ext' ),
'display' => urlencode( 'fallback' ),
);
$fonts_url = add_query_arg( $query_args, 'https://fonts.googleapis.com/css' );
}
return esc_url_raw( $fonts_url );
}
/**
* Add preconnect for Google Fonts.
*
* @since Twenty Seventeen 1.0
*
* @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 twentyseventeen_resource_hints( $urls, $relation_type ) {
if ( wp_style_is( 'twentyseventeen-fonts', 'queue' ) && 'preconnect' === $relation_type ) {
$urls[] = array(
'href' => 'https://fonts.gstatic.com',
'crossorigin',
);
}
return $urls;
}
add_filter( 'wp_resource_hints', 'twentyseventeen_resource_hints', 10, 2 );
/**
* Register widget area.
*
* @link https://developer.wordpress.org/themes/functionality/sidebars/#registering-a-sidebar
*/
function twentyseventeen_widgets_init() {
register_sidebar(
array(
'name' => __( 'Blog Sidebar', 'twentyseventeen' ),
'id' => 'sidebar-1',
'description' => __( 'Add widgets here to appear in your sidebar on blog posts and archive pages.', 'twentyseventeen' ),
'before_widget' => '<section id="%1$s" class="widget %2$s">',
'after_widget' => '</section>',
'before_title' => '<h2 class="widget-title">',
'after_title' => '</h2>',
)
);
register_sidebar(
array(
'name' => __( 'Footer 1', 'twentyseventeen' ),
'id' => 'sidebar-2',
'description' => __( 'Add widgets here to appear in your footer.', 'twentyseventeen' ),
'before_widget' => '<section id="%1$s" class="widget %2$s">',
'after_widget' => '</section>',
'before_title' => '<h2 class="widget-title">',
'after_title' => '</h2>',
)
);
register_sidebar(
array(
'name' => __( 'Footer 2', 'twentyseventeen' ),
'id' => 'sidebar-3',
'description' => __( 'Add widgets here to appear in your footer.', 'twentyseventeen' ),
'before_widget' => '<section id="%1$s" class="widget %2$s">',
'after_widget' => '</section>',
'before_title' => '<h2 class="widget-title">',
'after_title' => '</h2>',
)
);
}
add_action( 'widgets_init', 'twentyseventeen_widgets_init' );
/**
* Replaces "[...]" (appended to automatically generated excerpts) with ... and
* a 'Continue reading' link.
*
* @since Twenty Seventeen 1.0
*
* @param string $link Link to single post/page.
* @return string 'Continue reading' link prepended with an ellipsis.
*/
function twentyseventeen_excerpt_more( $link ) {
if ( is_admin() ) {
return $link;
}
$link = sprintf(
'<p class="link-more"><a href="%1$s" class="more-link">%2$s</a></p>',
esc_url( get_permalink( get_the_ID() ) ),
/* translators: %s: Post title. Only visible to screen readers. */
sprintf( __( 'Continue reading<span class="screen-reader-text"> "%s"</span>', 'twentyseventeen' ), get_the_title( get_the_ID() ) )
);
return ' … ' . $link;
}
add_filter( 'excerpt_more', 'twentyseventeen_excerpt_more' );
/**
* Handles JavaScript detection.
*
* Adds a `js` class to the root `<html>` element when JavaScript is detected.
*
* @since Twenty Seventeen 1.0
*/
function twentyseventeen_javascript_detection() {
echo "<script>(function(html){html.className = html.className.replace(/\bno-js\b/,'js')})(document.documentElement);</script>\n";
}
add_action( 'wp_head', 'twentyseventeen_javascript_detection', 0 );
/**
* Add a pingback url auto-discovery header for singularly identifiable articles.
*/
function twentyseventeen_pingback_header() {
if ( is_singular() && pings_open() ) {
printf( '<link rel="pingback" href="%s">' . "\n", esc_url( get_bloginfo( 'pingback_url' ) ) );
}
}
add_action( 'wp_head', 'twentyseventeen_pingback_header' );
/**
* Display custom color CSS.
*/
function twentyseventeen_colors_css_wrap() {
if ( 'custom' !== get_theme_mod( 'colorscheme' ) && ! is_customize_preview() ) {
return;
}
require_once get_parent_theme_file_path( '/inc/color-patterns.php' );
$hue = absint( get_theme_mod( 'colorscheme_hue', 250 ) );
$customize_preview_data_hue = '';
if ( is_customize_preview() ) {
$customize_preview_data_hue = 'data-hue="' . $hue . '"';
}
?>
<style type="text/css" id="custom-theme-colors" <?php echo $customize_preview_data_hue; ?>>
<?php echo twentyseventeen_custom_colors_css(); ?>
</style>
<?php
}
add_action( 'wp_head', 'twentyseventeen_colors_css_wrap' );
/**
* Enqueues scripts and styles.
*/
function twentyseventeen_scripts() {
// Add custom fonts, used in the main stylesheet.
wp_enqueue_style( 'twentyseventeen-fonts', twentyseventeen_fonts_url(), array(), null );
// Theme stylesheet.
wp_enqueue_style( 'twentyseventeen-style', get_stylesheet_uri(), array(), '20201208' );
// Theme block stylesheet.
wp_enqueue_style( 'twentyseventeen-block-style', get_theme_file_uri( '/assets/css/blocks.css' ), array( 'twentyseventeen-style' ), '20220524' );
// Load the dark colorscheme.
if ( 'dark' === get_theme_mod( 'colorscheme', 'light' ) || is_customize_preview() ) {
wp_enqueue_style( 'twentyseventeen-colors-dark', get_theme_file_uri( '/assets/css/colors-dark.css' ), array( 'twentyseventeen-style' ), '20190408' );
}
// Load the Internet Explorer 9 specific stylesheet, to fix display issues in the Customizer.
if ( is_customize_preview() ) {
wp_enqueue_style( 'twentyseventeen-ie9', get_theme_file_uri( '/assets/css/ie9.css' ), array( 'twentyseventeen-style' ), '20161202' );
wp_style_add_data( 'twentyseventeen-ie9', 'conditional', 'IE 9' );
}
// Load the Internet Explorer 8 specific stylesheet.
wp_enqueue_style( 'twentyseventeen-ie8', get_theme_file_uri( '/assets/css/ie8.css' ), array( 'twentyseventeen-style' ), '20161202' );
wp_style_add_data( 'twentyseventeen-ie8', 'conditional', 'lt IE 9' );
// Load the html5 shiv.
wp_enqueue_script( 'html5', get_theme_file_uri( '/assets/js/html5.js' ), array(), '20161020' );
wp_script_add_data( 'html5', 'conditional', 'lt IE 9' );
wp_enqueue_script( 'twentyseventeen-skip-link-focus-fix', get_theme_file_uri( '/assets/js/skip-link-focus-fix.js' ), array(), '20161114', true );
$twentyseventeen_l10n = array(
'quote' => twentyseventeen_get_svg( array( 'icon' => 'quote-right' ) ),
);
if ( has_nav_menu( 'top' ) ) {
wp_enqueue_script( 'twentyseventeen-navigation', get_theme_file_uri( '/assets/js/navigation.js' ), array( 'jquery' ), '20161203', true );
$twentyseventeen_l10n['expand'] = __( 'Expand child menu', 'twentyseventeen' );
$twentyseventeen_l10n['collapse'] = __( 'Collapse child menu', 'twentyseventeen' );
$twentyseventeen_l10n['icon'] = twentyseventeen_get_svg(
array(
'icon' => 'angle-down',
'fallback' => true,
)
);
}
wp_enqueue_script( 'twentyseventeen-global', get_theme_file_uri( '/assets/js/global.js' ), array( 'jquery' ), '20190121', true );
wp_enqueue_script( 'jquery-scrollto', get_theme_file_uri( '/assets/js/jquery.scrollTo.js' ), array( 'jquery' ), '2.1.2', true );
wp_localize_script( 'twentyseventeen-skip-link-focus-fix', 'twentyseventeenScreenReaderText', $twentyseventeen_l10n );
if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
wp_enqueue_script( 'comment-reply' );
}
}
add_action( 'wp_enqueue_scripts', 'twentyseventeen_scripts' );
/**
* Enqueues styles for the block-based editor.
*
* @since Twenty Seventeen 1.8
*/
function twentyseventeen_block_editor_styles() {
// Block styles.
wp_enqueue_style( 'twentyseventeen-block-editor-style', get_theme_file_uri( '/assets/css/editor-blocks.css' ), array(), '20201208' );
// Add custom fonts.
wp_enqueue_style( 'twentyseventeen-fonts', twentyseventeen_fonts_url(), array(), null );
}
add_action( 'enqueue_block_editor_assets', 'twentyseventeen_block_editor_styles' );
/**
* Add custom image sizes attribute to enhance responsive image functionality
* for content images.
*
* @since Twenty Seventeen 1.0
*
* @param string $sizes A source size value for use in a 'sizes' attribute.
* @param array $size Image size. Accepts an array of width and height
* values in pixels (in that order).
* @return string A source size value for use in a content image 'sizes' attribute.
*/
function twentyseventeen_content_image_sizes_attr( $sizes, $size ) {
$width = $size[0];
if ( 740 <= $width ) {
$sizes = '(max-width: 706px) 89vw, (max-width: 767px) 82vw, 740px';
}
if ( is_active_sidebar( 'sidebar-1' ) || is_archive() || is_search() || is_home() || is_page() ) {
if ( ! ( is_page() && 'one-column' === get_theme_mod( 'page_options' ) ) && 767 <= $width ) {
$sizes = '(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px';
}
}
return $sizes;
}
add_filter( 'wp_calculate_image_sizes', 'twentyseventeen_content_image_sizes_attr', 10, 2 );
/**
* Filters the `sizes` value in the header image markup.
*
* @since Twenty Seventeen 1.0
*
* @param string $html The HTML image tag markup being filtered.
* @param object $header The custom header object returned by 'get_custom_header()'.
* @param array $attr Array of the attributes for the image tag.
* @return string The filtered header image HTML.
*/
function twentyseventeen_header_image_tag( $html, $header, $attr ) {
if ( isset( $attr['sizes'] ) ) {
$html = str_replace( $attr['sizes'], '100vw', $html );
}
return $html;
}
add_filter( 'get_header_image_tag', 'twentyseventeen_header_image_tag', 10, 3 );
/**
* Add custom image sizes attribute to enhance responsive image functionality
* for post thumbnails.
*
* @since Twenty Seventeen 1.0
*
* @param string[] $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|int[] $size Requested image size. Can be any registered image size name, or
* an array of width and height values in pixels (in that order).
* @return string[] The filtered attributes for the image markup.
*/
function twentyseventeen_post_thumbnail_sizes_attr( $attr, $attachment, $size ) {
if ( is_archive() || is_search() || is_home() ) {
$attr['sizes'] = '(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px';
} else {
$attr['sizes'] = '100vw';
}
return $attr;
}
add_filter( 'wp_get_attachment_image_attributes', 'twentyseventeen_post_thumbnail_sizes_attr', 10, 3 );
/**
* Use front-page.php when Front page displays is set to a static page.
*
* @since Twenty Seventeen 1.0
*
* @param string $template front-page.php.
* @return string The template to be used: blank if is_home() is true (defaults to index.php),
* otherwise $template.
*/
function twentyseventeen_front_page_template( $template ) {
return is_home() ? '' : $template;
}
add_filter( 'frontpage_template', 'twentyseventeen_front_page_template' );
/**
* Modifies tag cloud widget arguments to display all tags in the same font size
* and use list format for better accessibility.
*
* @since Twenty Seventeen 1.4
*
* @param array $args Arguments for tag cloud widget.
* @return array The filtered arguments for tag cloud widget.
*/
function twentyseventeen_widget_tag_cloud_args( $args ) {
$args['largest'] = 1;
$args['smallest'] = 1;
$args['unit'] = 'em';
$args['format'] = 'list';
return $args;
}
add_filter( 'widget_tag_cloud_args', 'twentyseventeen_widget_tag_cloud_args' );
/**
* Gets unique ID.
*
* This is a PHP implementation of Underscore's uniqueId method. A static variable
* contains an integer that is incremented with each call. This number is returned
* with the optional prefix. As such the returned value is not universally unique,
* but it is unique across the life of the PHP process.
*
* @since Twenty Seventeen 2.0
*
* @see wp_unique_id() Themes requiring WordPress 5.0.3 and greater should use this instead.
*
* @param string $prefix Prefix for the returned ID.
* @return string Unique ID.
*/
function twentyseventeen_unique_id( $prefix = '' ) {
static $id_counter = 0;
if ( function_exists( 'wp_unique_id' ) ) {
return wp_unique_id( $prefix );
}
return $prefix . (string) ++$id_counter;
}
if ( ! function_exists( 'wp_get_list_item_separator' ) ) :
/**
* Retrieves the list item separator based on the locale.
*
* Added for backward compatibility to support pre-6.0.0 WordPress versions.
*
* @since 6.0.0
*/
function wp_get_list_item_separator() {
/* translators: Used between list items, there is a space after the comma. */
return __( ', ', 'twentyseventeen' );
}
endif;
/**
* Implement the Custom Header feature.
*/
require get_parent_theme_file_path( '/inc/custom-header.php' );
/**
* Custom template tags for this theme.
*/
require get_parent_theme_file_path( '/inc/template-tags.php' );
/**
* Additional features to allow styling of the templates.
*/
require get_parent_theme_file_path( '/inc/template-functions.php' );
/**
* Customizer additions.
*/
require get_parent_theme_file_path( '/inc/customizer.php' );
/**
* SVG icons functions and filters.
*/
require get_parent_theme_file_path( '/inc/icon-functions.php' );
/**
* Block Patterns.
*/
require get_template_directory() . '/inc/block-patterns.php';