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<?php
/**
* Functions and definitions
*
* @link https://developer.wordpress.org/themes/basics/theme-functions/
*
* @package WordPress
* @subpackage Twenty_Twenty_One
* @since 1.0.0
*/
// This theme requires WordPress 5.3 or later.
if ( version_compare( $GLOBALS['wp_version'], '5.3', '<' ) ) {
require get_template_directory() . '/inc/back-compat.php';
}
if ( ! function_exists( 'twenty_twenty_one_setup' ) ) {
/**
* 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 1.0.0
*
* @return void
*/
function twenty_twenty_one_setup() {
/*
* Make theme available for translation.
* Translations can be filed in the /languages/ directory.
* If you're building a theme based on Twenty Twenty-One, use a find and replace
* to change 'twentytwentyone' to the name of your theme in all the template files.
*/
load_theme_textdomain( 'twentytwentyone', get_template_directory() . '/languages' );
// Add default posts and comments RSS feed links to head.
add_theme_support( 'automatic-feed-links' );
/*
* Let WordPress manage the document title.
* This theme does not use a hard-coded <title> tag in the document head,
* WordPress will provide it for us.
*/
add_theme_support( 'title-tag' );
/**
* Add post-formats support.
*/
add_theme_support(
'post-formats',
array(
'link',
'aside',
'gallery',
'image',
'quote',
'status',
'video',
'audio',
'chat',
)
);
/*
* 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( 1568, 9999 );
register_nav_menus(
array(
'primary' => esc_html__( 'Primary menu', 'twentytwentyone' ),
'footer' => __( 'Secondary menu', 'twentytwentyone' ),
)
);
/*
* 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',
'style',
'script',
'navigation-widgets',
)
);
/**
* Add support for core custom logo.
*
* @link https://codex.wordpress.org/Theme_Logo
*/
$logo_width = 300;
$logo_height = 100;
add_theme_support(
'custom-logo',
array(
'height' => $logo_height,
'width' => $logo_width,
'flex-width' => true,
'flex-height' => true,
'unlink-homepage-logo' => true,
)
);
// Add theme support for selective refresh for widgets.
add_theme_support( 'customize-selective-refresh-widgets' );
// Add support for Block Styles.
add_theme_support( 'wp-block-styles' );
// Add support for full and wide align images.
add_theme_support( 'align-wide' );
// Add support for editor styles.
add_theme_support( 'editor-styles' );
$background_color = get_theme_mod( 'background_color', 'D1E4DD' );
if ( 127 > Twenty_Twenty_One_Custom_Colors::get_relative_luminance_from_hex( $background_color ) ) {
add_theme_support( 'dark-editor-style' );
}
$editor_stylesheet_path = './assets/css/style-editor.css';
// Note, the is_IE global variable is defined by WordPress and is used
// to detect if the current browser is internet explorer.
global $is_IE;
if ( $is_IE ) {
$editor_stylesheet_path = './assets/css/ie-editor.css';
}
// Enqueue editor styles.
add_editor_style( $editor_stylesheet_path );
// Add custom editor font sizes.
add_theme_support(
'editor-font-sizes',
array(
array(
'name' => esc_html__( 'Extra small', 'twentytwentyone' ),
'shortName' => esc_html_x( 'XS', 'Font size', 'twentytwentyone' ),
'size' => 16,
'slug' => 'extra-small',
),
array(
'name' => esc_html__( 'Small', 'twentytwentyone' ),
'shortName' => esc_html_x( 'S', 'Font size', 'twentytwentyone' ),
'size' => 18,
'slug' => 'small',
),
array(
'name' => esc_html__( 'Normal', 'twentytwentyone' ),
'shortName' => esc_html_x( 'M', 'Font size', 'twentytwentyone' ),
'size' => 20,
'slug' => 'normal',
),
array(
'name' => esc_html__( 'Large', 'twentytwentyone' ),
'shortName' => esc_html_x( 'L', 'Font size', 'twentytwentyone' ),
'size' => 24,
'slug' => 'large',
),
array(
'name' => esc_html__( 'Extra large', 'twentytwentyone' ),
'shortName' => esc_html_x( 'XL', 'Font size', 'twentytwentyone' ),
'size' => 40,
'slug' => 'extra-large',
),
array(
'name' => esc_html__( 'Huge', 'twentytwentyone' ),
'shortName' => esc_html_x( 'XXL', 'Font size', 'twentytwentyone' ),
'size' => 96,
'slug' => 'huge',
),
array(
'name' => esc_html__( 'Gigantic', 'twentytwentyone' ),
'shortName' => esc_html_x( 'XXXL', 'Font size', 'twentytwentyone' ),
'size' => 144,
'slug' => 'gigantic',
),
)
);
// Custom background color.
add_theme_support(
'custom-background',
array(
'default-color' => 'd1e4dd',
)
);
// Editor color palette.
$black = '#000000';
$dark_gray = '#28303D';
$gray = '#39414D';
$green = '#D1E4DD';
$blue = '#D1DFE4';
$purple = '#D1D1E4';
$red = '#E4D1D1';
$orange = '#E4DAD1';
$yellow = '#EEEADD';
$white = '#FFFFFF';
add_theme_support(
'editor-color-palette',
array(
array(
'name' => esc_html__( 'Black', 'twentytwentyone' ),
'slug' => 'black',
'color' => $black,
),
array(
'name' => esc_html__( 'Dark gray', 'twentytwentyone' ),
'slug' => 'dark-gray',
'color' => $dark_gray,
),
array(
'name' => esc_html__( 'Gray', 'twentytwentyone' ),
'slug' => 'gray',
'color' => $gray,
),
array(
'name' => esc_html__( 'Green', 'twentytwentyone' ),
'slug' => 'green',
'color' => $green,
),
array(
'name' => esc_html__( 'Blue', 'twentytwentyone' ),
'slug' => 'blue',
'color' => $blue,
),
array(
'name' => esc_html__( 'Purple', 'twentytwentyone' ),
'slug' => 'purple',
'color' => $purple,
),
array(
'name' => esc_html__( 'Red', 'twentytwentyone' ),
'slug' => 'red',
'color' => $red,
),
array(
'name' => esc_html__( 'Orange', 'twentytwentyone' ),
'slug' => 'orange',
'color' => $orange,
),
array(
'name' => esc_html__( 'Yellow', 'twentytwentyone' ),
'slug' => 'yellow',
'color' => $yellow,
),
array(
'name' => esc_html__( 'White', 'twentytwentyone' ),
'slug' => 'white',
'color' => $white,
),
)
);
add_theme_support(
'editor-gradient-presets',
array(
array(
'name' => esc_html__( 'Purple to yellow', 'twentytwentyone' ),
'gradient' => 'linear-gradient(160deg, ' . $purple . ' 0%, ' . $yellow . ' 100%)',
'slug' => 'purple-to-yellow',
),
array(
'name' => esc_html__( 'Yellow to purple', 'twentytwentyone' ),
'gradient' => 'linear-gradient(160deg, ' . $yellow . ' 0%, ' . $purple . ' 100%)',
'slug' => 'yellow-to-purple',
),
array(
'name' => esc_html__( 'Green to yellow', 'twentytwentyone' ),
'gradient' => 'linear-gradient(160deg, ' . $green . ' 0%, ' . $yellow . ' 100%)',
'slug' => 'green-to-yellow',
),
array(
'name' => esc_html__( 'Yellow to green', 'twentytwentyone' ),
'gradient' => 'linear-gradient(160deg, ' . $yellow . ' 0%, ' . $green . ' 100%)',
'slug' => 'yellow-to-green',
),
array(
'name' => esc_html__( 'Red to yellow', 'twentytwentyone' ),
'gradient' => 'linear-gradient(160deg, ' . $red . ' 0%, ' . $yellow . ' 100%)',
'slug' => 'red-to-yellow',
),
array(
'name' => esc_html__( 'Yellow to red', 'twentytwentyone' ),
'gradient' => 'linear-gradient(160deg, ' . $yellow . ' 0%, ' . $red . ' 100%)',
'slug' => 'yellow-to-red',
),
array(
'name' => esc_html__( 'Purple to red', 'twentytwentyone' ),
'gradient' => 'linear-gradient(160deg, ' . $purple . ' 0%, ' . $red . ' 100%)',
'slug' => 'purple-to-red',
),
array(
'name' => esc_html__( 'Red to purple', 'twentytwentyone' ),
'gradient' => 'linear-gradient(160deg, ' . $red . ' 0%, ' . $purple . ' 100%)',
'slug' => 'red-to-purple',
),
)
);
/*
* Adds starter content to highlight the theme on fresh sites.
* This is done conditionally to avoid loading the starter content on every
* page load, as it is a one-off operation only needed once in the customizer.
*/
if ( is_customize_preview() ) {
require get_template_directory() . '/inc/starter-content.php';
add_theme_support( 'starter-content', twenty_twenty_one_get_starter_content() );
}
// Add support for responsive embedded content.
add_theme_support( 'responsive-embeds' );
// Add support for custom line height controls.
add_theme_support( 'custom-line-height' );
// Add support for experimental link color control.
add_theme_support( 'experimental-link-color' );
// Add support for experimental cover block spacing.
add_theme_support( 'custom-spacing' );
// Add support for custom units.
// This was removed in WordPress 5.6 but is still required to properly support WP 5.5.
add_theme_support( 'custom-units' );
}
}
add_action( 'after_setup_theme', 'twenty_twenty_one_setup' );
/**
* Register widget area.
*
* @since 1.0.0
*
* @link https://developer.wordpress.org/themes/functionality/sidebars/#registering-a-sidebar
*
* @return void
*/
function twenty_twenty_one_widgets_init() {
register_sidebar(
array(
'name' => esc_html__( 'Footer', 'twentytwentyone' ),
'id' => 'sidebar-1',
'description' => esc_html__( 'Add widgets here to appear in your footer.', 'twentytwentyone' ),
'before_widget' => '<section id="%1$s" class="widget %2$s">',
'after_widget' => '</section>',
'before_title' => '<h2 class="widget-title">',
'after_title' => '</h2>',
)
);
}
add_action( 'widgets_init', 'twenty_twenty_one_widgets_init' );
/**
* Set the content width in pixels, based on the theme's design and stylesheet.
*
* Priority 0 to make it available to lower priority callbacks.
*
* @since 1.0.0
*
* @global int $content_width Content width.
*
* @return void
*/
function twenty_twenty_one_content_width() {
// This variable is intended to be overruled from themes.
// Open WPCS issue: {@link https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/issues/1043}.
// phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedVariableFound
$GLOBALS['content_width'] = apply_filters( 'twenty_twenty_one_content_width', 750 );
}
add_action( 'after_setup_theme', 'twenty_twenty_one_content_width', 0 );
/**
* Enqueue scripts and styles.
*
* @since 1.0.0
*
* @return void
*/
function twenty_twenty_one_scripts() {
// Note, the is_IE global variable is defined by WordPress and is used
// to detect if the current browser is internet explorer.
global $is_IE;
if ( $is_IE ) {
// If IE 11 or below, use a flattened stylesheet with static values replacing CSS Variables.
wp_enqueue_style( 'twenty-twenty-one-style', get_template_directory_uri() . '/assets/css/ie.css', array(), wp_get_theme()->get( 'Version' ) );
} else {
// If not IE, use the standard stylesheet.
wp_enqueue_style( 'twenty-twenty-one-style', get_template_directory_uri() . '/style.css', array(), wp_get_theme()->get( 'Version' ) );
}
// RTL styles.
wp_style_add_data( 'twenty-twenty-one-style', 'rtl', 'replace' );
// Print styles.
wp_enqueue_style( 'twenty-twenty-one-print-style', get_template_directory_uri() . '/assets/css/print.css', array(), wp_get_theme()->get( 'Version' ), 'print' );
// Threaded comment reply styles.
if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
wp_enqueue_script( 'comment-reply' );
}
wp_register_script(
'twenty-twenty-one-ie11-polyfills',
get_template_directory_uri() . '/assets/js/polyfills.js',
array(),
wp_get_theme()->get( 'Version' ),
true
);
// Main navigation scripts.
if ( has_nav_menu( 'primary' ) ) {
wp_enqueue_script(
'twenty-twenty-one-primary-navigation-script',
get_template_directory_uri() . '/assets/js/primary-navigation.js',
array( 'twenty-twenty-one-ie11-polyfills' ),
wp_get_theme()->get( 'Version' ),
true
);
}
// Responsive embeds script.
wp_enqueue_script(
'twenty-twenty-one-responsive-embeds-script',
get_template_directory_uri() . '/assets/js/responsive-embeds.js',
array( 'twenty-twenty-one-ie11-polyfills' ),
wp_get_theme()->get( 'Version' ),
true
);
}
add_action( 'wp_enqueue_scripts', 'twenty_twenty_one_scripts' );
/**
* Enqueue block editor script.
*
* @since 1.0.0
*
* @return void
*/
function twentytwentyone_block_editor_script() {
wp_enqueue_script( 'twentytwentyone-editor', get_theme_file_uri( '/assets/js/editor.js' ), array( 'wp-blocks', 'wp-dom' ), wp_get_theme()->get( 'Version' ), true );
}
add_action( 'enqueue_block_editor_assets', 'twentytwentyone_block_editor_script' );
/**
* 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.
*
* @link https://git.io/vWdr2
*/
function twenty_twenty_one_skip_link_focus_fix() {
// If SCRIPT_DEBUG is defined and true, print the unminified file.
if ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) {
echo '<script>';
include get_template_directory() . '/assets/js/skip-link-focus-fix.js';
echo '</script>';
}
// The following is minified via `npx 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', 'twenty_twenty_one_skip_link_focus_fix' );
/** Enqueue non-latin language styles
*
* @since 1.0.0
*
* @return void
*/
function twenty_twenty_one_non_latin_languages() {
$custom_css = twenty_twenty_one_get_non_latin_css( 'front-end' );
if ( $custom_css ) {
wp_add_inline_style( 'twenty-twenty-one-style', $custom_css );
}
}
add_action( 'wp_enqueue_scripts', 'twenty_twenty_one_non_latin_languages' );
// SVG Icons class.
require get_template_directory() . '/classes/class-twenty-twenty-one-svg-icons.php';
// Custom color classes.
require get_template_directory() . '/classes/class-twenty-twenty-one-custom-colors.php';
new Twenty_Twenty_One_Custom_Colors();
// Enhance the theme by hooking into WordPress.
require get_template_directory() . '/inc/template-functions.php';
// Menu functions and filters.
require get_template_directory() . '/inc/menu-functions.php';
// Custom template tags for the theme.
require get_template_directory() . '/inc/template-tags.php';
// Customizer additions.
require get_template_directory() . '/classes/class-twenty-twenty-one-customize.php';
new Twenty_Twenty_One_Customize();
// Block Patterns.
require get_template_directory() . '/inc/block-patterns.php';
// Block Styles.
require get_template_directory() . '/inc/block-styles.php';
// Dark Mode.
require_once get_template_directory() . '/classes/class-twenty-twenty-one-dark-mode.php';
new Twenty_Twenty_One_Dark_Mode();
/**
* Enqueue scripts for the customizer preview.
*
* @since 1.0.0
*
* @return void
*/
function twentytwentyone_customize_preview_init() {
wp_enqueue_script(
'twentytwentyone-customize-helpers',
get_theme_file_uri( '/assets/js/customize-helpers.js' ),
array(),
wp_get_theme()->get( 'Version' ),
true
);
wp_enqueue_script(
'twentytwentyone-customize-preview',
get_theme_file_uri( '/assets/js/customize-preview.js' ),
array( 'customize-preview', 'customize-selective-refresh', 'jquery', 'twentytwentyone-customize-helpers' ),
wp_get_theme()->get( 'Version' ),
true
);
}
add_action( 'customize_preview_init', 'twentytwentyone_customize_preview_init' );
/**
* Enqueue scripts for the customizer.
*
* @since 1.0.0
*
* @return void
*/
function twentytwentyone_customize_controls_enqueue_scripts() {
wp_enqueue_script(
'twentytwentyone-customize-helpers',
get_theme_file_uri( '/assets/js/customize-helpers.js' ),
array(),
wp_get_theme()->get( 'Version' ),
true
);
}
add_action( 'customize_controls_enqueue_scripts', 'twentytwentyone_customize_controls_enqueue_scripts' );
/**
* Calculate classes for the main <html> element.
*
* @since 1.0.0
*
* @return void
*/
function twentytwentyone_the_html_classes() {
$classes = apply_filters( 'twentytwentyone_html_classes', '' );
if ( ! $classes ) {
return;
}
echo 'class="' . esc_attr( $classes ) . '"';
}
/**
* Add "is-IE" class to body if the user is on Internet Explorer.
*
* @since 1.0.0
*
* @return void
*/
function twentytwentyone_add_ie_class() {
?>
<script>
if ( -1 !== navigator.userAgent.indexOf( 'MSIE' ) || -1 !== navigator.appVersion.indexOf( 'Trident/' ) ) {
document.body.classList.add( 'is-IE' );
}
</script>
<?php
}
add_action( 'wp_footer', 'twentytwentyone_add_ie_class' );