<?php
/**
* Theme, template, and stylesheet functions.
*
* @package WordPress
* @subpackage Theme
*/

/**
* Returns an array of WP_Theme objects based on the arguments.
*
* Despite advances over get_themes(), this function is quite expensive, and grows
* linearly with additional themes. Stick to wp_get_theme() if possible.
*
* @since 3.4.0
*
* @global array $wp_theme_directories
*
* @param array $args {
* Optional. The search arguments.
*
* @type mixed $errors True to return themes with errors, false to return
* themes without errors, null to return all themes.
* Default false.
* @type mixed $allowed (Multisite) True to return only allowed themes for a site.
* False to return only disallowed themes for a site.
* 'site' to return only site-allowed themes.
* 'network' to return only network-allowed themes.
* Null to return all themes. Default null.
* @type int $blog_id (Multisite) The blog ID used to calculate which themes
* are allowed. Default 0, synonymous for the current blog.
* }
* @return WP_Theme[] Array of WP_Theme objects.
*/
function wp_get_themes( $args = array() ) {
global $wp_theme_directories;

$defaults = array(
'errors' => false,
'allowed' => null,
'blog_id' => 0,
);
$args = wp_parse_args( $args, $defaults );

$theme_directories = search_theme_directories();

if ( is_array( $wp_theme_directories ) && count( $wp_theme_directories ) > 1 ) {
/*
* Make sure the active theme wins out, in case search_theme_directories() picks the wrong
* one in the case of a conflict. (Normally, last registered theme root wins.)
*/
$current_theme = get_stylesheet();
if ( isset( $theme_directories[ $current_theme ] ) ) {
$root_of_current_theme = get_raw_theme_root( $current_theme );
if ( ! in_array( $root_of_current_theme, $wp_theme_directories, true ) ) {
$root_of_current_theme = WP_CONTENT_DIR . $root_of_current_theme;
}
$theme_directories[ $current_theme ]['theme_root'] = $root_of_current_theme;
}
}

if ( empty( $theme_directories ) ) {
return array();
}

if ( is_multisite() && null !== $args['allowed'] ) {
$allowed = $args['allowed'];
if ( 'network' === $allowed ) {
$theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed_on_network() );
} elseif ( 'site' === $allowed ) {
$theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed_on_site( $args['blog_id'] ) );
} elseif ( $allowed ) {
$theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed( $args['blog_id'] ) );
} else {
$theme_directories = array_diff_key( $theme_directories, WP_Theme::get_allowed( $args['blog_id'] ) );
}
}

$themes = array();
static $_themes = array();

foreach ( $theme_directories as $theme => $theme_root ) {
if ( isset( $_themes[ $theme_root['theme_root'] . '/' . $theme ] ) ) {
$themes[ $theme ] = $_themes[ $theme_root['theme_root'] . '/' . $theme ];
} else {
$themes[ $theme ] = new WP_Theme( $theme, $theme_root['theme_root'] );

$_themes[ $theme_root['theme_root'] . '/' . $theme ] = $themes[ $theme ];
}
}

if ( null !== $args['errors'] ) {
foreach ( $themes as $theme => $wp_theme ) {
if ( (bool) $wp_theme->errors() !== $args['errors'] ) {
unset( $themes[ $theme ] );
}
}
}

return $themes;
}

/**
* Gets a WP_Theme object for a theme.
*
* @since 3.4.0
*
* @global array $wp_theme_directories
*
* @param string $stylesheet Optional. Directory name for the theme. Defaults to active theme.
* @param string $theme_root Optional. Absolute path of the theme root to look in.
* If not specified, get_raw_theme_root() is used to calculate
* the theme root for the $stylesheet provided (or active theme).
* @return WP_Theme Theme object. Be sure to check the object's exists() method
* if you need to confirm the theme's existence.
*/
function wp_get_theme( $stylesheet = '', $theme_root = '' ) {
global $wp_theme_directories;

if ( empty( $stylesheet ) ) {
$stylesheet = get_stylesheet();
}

if ( empty( $theme_root ) ) {
$theme_root = get_raw_theme_root( $stylesheet );
if ( false === $theme_root ) {
$theme_root = WP_CONTENT_DIR . '/themes';
} elseif ( ! in_array( $theme_root, (array) $wp_theme_directories, true ) ) {
$theme_root = WP_CONTENT_DIR . $theme_root;
}
}

return new WP_Theme( $stylesheet, $theme_root );
}

/**
* Clears the cache held by get_theme_roots() and WP_Theme.
*
* @since 3.5.0
* @param bool $clear_update_cache Whether to clear the theme updates cache.
*/
function wp_clean_themes_cache( $clear_update_cache = true ) {
if ( $clear_update_cache ) {
delete_site_transient( 'update_themes' );
}
search_theme_directories( true );
foreach ( wp_get_themes( array( 'errors' => null ) ) as $theme ) {
$theme->cache_delete();
}
}

/**
* Whether a child theme is in use.
*
* @since 3.0.0
* @since 6.5.0 Makes use of global template variables.
*
* @global string $wp_stylesheet_path Path to current theme's stylesheet directory.
* @global string $wp_template_path Path to current theme's template directory.
*
* @return bool True if a child theme is in use, false otherwise.
*/
function is_child_theme() {
global $wp_stylesheet_path, $wp_template_path;

return $wp_stylesheet_path !== $wp_template_path;
}

/**
* Retrieves name of the current stylesheet.
*
* The theme name that is currently set as the front end theme.
*
* For all intents and purposes, the template name and the stylesheet name
* are going to be the same for most cases.
*
* @since 1.5.0
*
* @return string Stylesheet name.
*/
function get_stylesheet() {
/**
* Filters the name of current stylesheet.
*
* @since 1.5.0
*
* @param string $stylesheet Name of the current stylesheet.
*/
return apply_filters( 'stylesheet', get_option( 'stylesheet' ) );
}

/**
* Retrieves stylesheet directory path for the active theme.
*
* @since 1.5.0
* @since 6.4.0 Memoizes filter execution so that it only runs once for the current theme.
* @since 6.4.2 Memoization removed.
*
* @return string Path to active theme's stylesheet directory.
*/
function get_stylesheet_directory() {
$stylesheet = get_stylesheet();
$theme_root = get_theme_root( $stylesheet );
$stylesheet_dir = "$theme_root/$stylesheet";

/**
* Filters the stylesheet directory path for the active theme.
*
* @since 1.5.0
*
* @param string $stylesheet_dir Absolute path to the active theme.
* @param string $stylesheet Directory name of the active theme.
* @param string $theme_root Absolute path to themes directory.
*/
return apply_filters( 'stylesheet_directory', $stylesheet_dir, $stylesheet, $theme_root );
}

/**
* Retrieves stylesheet directory URI for the active theme.
*
* @since 1.5.0
*
* @return string URI to active theme's stylesheet directory.
*/
function get_stylesheet_directory_uri() {
$stylesheet = str_replace( '%2F', '/', rawurlencode( get_stylesheet() ) );
$theme_root_uri = get_theme_root_uri( $stylesheet );
$stylesheet_dir_uri = "$theme_root_uri/$stylesheet";

/**
* Filters the stylesheet directory URI.
*
* @since 1.5.0
*
* @param string $stylesheet_dir_uri Stylesheet directory URI.
* @param string $stylesheet Name of the activated theme's directory.
* @param string $theme_root_uri Themes root URI.
*/
return apply_filters( 'stylesheet_directory_uri', $stylesheet_dir_uri, $stylesheet, $theme_root_uri );
}

/**
* Retrieves stylesheet URI for the active theme.
*
* The stylesheet file name is 'style.css' which is appended to the stylesheet directory URI path.
* See get_stylesheet_directory_uri().
*
* @since 1.5.0
*
* @return string URI to active theme's stylesheet.
*/
function get_stylesheet_uri() {
$stylesheet_dir_uri = get_stylesheet_directory_uri();
$stylesheet_uri = $stylesheet_dir_uri . '/style.css';
/**
* Filters the URI of the active theme stylesheet.
*
* @since 1.5.0
*
* @param string $stylesheet_uri Stylesheet URI for the active theme/child theme.
* @param string $stylesheet_dir_uri Stylesheet directory URI for the active theme/child theme.
*/
return apply_filters( 'stylesheet_uri', $stylesheet_uri, $stylesheet_dir_uri );
}

/**
* Retrieves the localized stylesheet URI.
*
* The stylesheet directory for the localized stylesheet files are located, by
* default, in the base theme directory. The name of the locale file will be the
* locale followed by '.css'. If that does not exist, then the text direction
* stylesheet will be checked for existence, for example 'ltr.css'.
*
* The theme may change the location of the stylesheet directory by either using
* the {@see 'stylesheet_directory_uri'} or {@see 'locale_stylesheet_uri'} filters.
*
* If you want to change the location of the stylesheet files for the entire
* WordPress workflow, then change the former. If you just have the locale in a
* separate folder, then change the latter.
*
* @since 2.1.0
*
* @global WP_Locale $wp_locale WordPress date and time locale object.
*
* @return string URI to active theme's localized stylesheet.
*/
function get_locale_stylesheet_uri() {
global $wp_locale;
$stylesheet_dir_uri = get_stylesheet_directory_uri();
$dir = get_stylesheet_directory();
$locale = get_locale();
if ( file_exists( "$dir/$locale.css" ) ) {
$stylesheet_uri = "$stylesheet_dir_uri/$locale.css";
} elseif ( ! empty( $wp_locale->text_direction ) && file_exists( "$dir/{$wp_locale->text_direction}.css" ) ) {
$stylesheet_uri = "$stylesheet_dir_uri/{$wp_locale->text_direction}.css";
} else {
$stylesheet_uri = '';
}
/**
* Filters the localized stylesheet URI.
*
* @since 2.1.0
*
* @param string $stylesheet_uri Localized stylesheet URI.
* @param string $stylesheet_dir_uri Stylesheet directory URI.
*/
return apply_filters( 'locale_stylesheet_uri', $stylesheet_uri, $stylesheet_dir_uri );
}

/**
* Retrieves name of the active theme.
*
* @since 1.5.0
*
* @return string Template name.
*/
function get_template() {
/**
* Filters the name of the active theme.
*
* @since 1.5.0
*
* @param string $template active theme's directory name.
*/
return apply_filters( 'template', get_option( 'template' ) );
}

/**
* Retrieves template directory path for the active theme.
*
* @since 1.5.0
* @since 6.4.0 Memoizes filter execution so that it only runs once for the current theme.
* @since 6.4.1 Memoization removed.
*
* @return string Path to active theme's template directory.
*/
function get_template_directory() {
$template = get_template();
$theme_root = get_theme_root( $template );
$template_dir = "$theme_root/$template";

/**
* Filters the active theme directory path.
*
* @since 1.5.0
*
* @param string $template_dir The path of the active theme directory.
* @param string $template Directory name of the active theme.
* @param string $theme_root Absolute path to the themes directory.
*/
return apply_filters( 'template_directory', $template_dir, $template, $theme_root );
}

/**
* Retrieves template directory URI for the active theme.
*
* @since 1.5.0
*
* @return string URI to active theme's template directory.
*/
function get_template_directory_uri() {
$template = str_replace( '%2F', '/', rawurlencode( get_template() ) );
$theme_root_uri = get_theme_root_uri( $template );
$template_dir_uri = "$theme_root_uri/$template";

/**
* Filters the active theme directory URI.
*
* @since 1.5.0
*
* @param string $template_dir_uri The URI of the active theme directory.
* @param string $template Directory name of the active theme.
* @param string $theme_root_uri The themes root URI.
*/
return apply_filters( 'template_directory_uri', $template_dir_uri, $template, $theme_root_uri );
}

/**
* Retrieves theme roots.
*
* @since 2.9.0
*
* @global array $wp_theme_directories
*
* @return array|string An array of theme roots keyed by template/stylesheet
* or a single theme root if all themes have the same root.
*/
function get_theme_roots() {
global $wp_theme_directories;

if ( ! is_array( $wp_theme_directories ) || count( $wp_theme_directories ) <= 1 ) {
return '/themes';
}

$theme_roots = get_site_transient( 'theme_roots' );
if ( false === $theme_roots ) {
search_theme_directories( true ); // Regenerate the transient.
$theme_roots = get_site_transient( 'theme_roots' );
}
return $theme_roots;
}

/**
* Registers a directory that contains themes.
*
* @since 2.9.0
*
* @global array $wp_theme_directories
*
* @param string $directory Either the full filesystem path to a theme folder
* or a folder within WP_CONTENT_DIR.
* @return bool True if successfully registered a directory that contains themes,
* false if the directory does not exist.
*/
function register_theme_directory( $directory ) {
global $wp_theme_directories;

if ( ! file_exists( $directory ) ) {
// Try prepending as the theme directory could be relative to the content directory.
$directory = WP_CONTENT_DIR . '/' . $directory;
// If this directory does not exist, return and do not register.
if ( ! file_exists( $directory ) ) {
return false;
}
}

if ( ! is_array( $wp_theme_directories ) ) {
$wp_theme_directories = array();
}

$untrailed = untrailingslashit( $directory );
if ( ! empty( $untrailed ) && ! in_array( $untrailed, $wp_theme_directories, true ) ) {
$wp_theme_directories[] = $untrailed;
}

return true;
}

/**
* Searches all registered theme directories for complete and valid themes.
*
* @since 2.9.0
*
* @global array $wp_theme_directories
*
* @param bool $force Optional. Whether to force a new directory scan. Default false.
* @return array|false Valid themes found on success, false on failure.
*/
function search_theme_directories( $force = false ) {
global $wp_theme_directories;
static $found_themes = null;

if ( empty( $wp_theme_directories ) ) {
return false;
}

if ( ! $force && isset( $found_themes ) ) {
return $found_themes;
}

$found_themes = array();

$wp_theme_directories = (array) $wp_theme_directories;
$relative_theme_roots = array();

/*
* Set up maybe-relative, maybe-absolute array of theme directories.
* We always want to return absolute, but we need to cache relative
* to use in get_theme_root().
*/
foreach ( $wp_theme_directories as $theme_root ) {
if ( str_starts_with( $theme_root, WP_CONTENT_DIR ) ) {
$relative_theme_roots[ str_replace( WP_CONTENT_DIR, '', $theme_root ) ] = $theme_root;
} else {
$relative_theme_roots[ $theme_root ] = $theme_root;
}
}

/**
* Filters whether to get the cache of the registered theme directories.
*
* @since 3.4.0
*
* @param bool $cache_expiration Whether to get the cache of the theme directories. Default false.
* @param string $context The class or function name calling the filter.
*/
$cache_expiration = apply_filters( 'wp_cache_themes_persistently', false, 'search_theme_directories' );

if ( $cache_expiration ) {
$cached_roots = get_site_transient( 'theme_roots' );
if ( is_array( $cached_roots ) ) {
foreach ( $cached_roots as $theme_dir => $theme_root ) {
// A cached theme root is no longer around, so skip it.
if ( ! isset( $relative_theme_roots[ $theme_root ] ) ) {
continue;
}
$found_themes[ $theme_dir ] = array(
'theme_file' => $theme_dir . '/style.css',
'theme_root' => $relative_theme_roots[ $theme_root ], // Convert relative to absolute.
);
}
return $found_themes;
}
if ( ! is_int( $cache_expiration ) ) {
$cache_expiration = 30 * MINUTE_IN_SECONDS;
}
} else {
$cache_expiration = 30 * MINUTE_IN_SECONDS;
}

/* Loop the registered theme directories and extract all themes */
foreach ( $wp_theme_directories as $theme_root ) {

// Start with directories in the root of the active theme directory.
$dirs = @ scandir( $theme_root );
if ( ! $dirs ) {
wp_trigger_error( __FUNCTION__, "$theme_root is not readable" );
continue;
}
foreach ( $dirs as $dir ) {
if ( ! is_dir( $theme_root . '/' . $dir ) || '.' === $dir[0] || 'CVS' === $dir ) {
continue;
}
if ( file_exists( $theme_root . '/' . $dir . '/style.css' ) ) {
/*
* wp-content/themes/a-single-theme
* wp-content/themes is $theme_root, a-single-theme is $dir.
*/
$found_themes[ $dir ] = array(
'theme_file' => $dir . '/style.css',
'theme_root' => $theme_root,
);
} else {
$found_theme = false;
/*
* wp-content/themes/a-folder-of-themes/*
* wp-content/themes is $theme_root, a-folder-of-themes is $dir, then themes are $sub_dirs.
*/
$sub_dirs = @ scandir( $theme_root . '/' . $dir );
if ( ! $sub_dirs ) {
wp_trigger_error( __FUNCTION__, "$theme_root/$dir is not readable" );
continue;
}
foreach ( $sub_dirs as $sub_dir ) {
if ( ! is_dir( $theme_root . '/' . $dir . '/' . $sub_dir ) || '.' === $dir[0] || 'CVS' === $dir ) {
continue;
}
if ( ! file_exists( $theme_root . '/' . $dir . '/' . $sub_dir . '/style.css' ) ) {
continue;
}
$found_themes[ $dir . '/' . $sub_dir ] = array(
'theme_file' => $dir . '/' . $sub_dir . '/style.css',
'theme_root' => $theme_root,
);
$found_theme = true;
}
/*
* Never mind the above, it's just a theme missing a style.css.
* Return it; WP_Theme will catch the error.
*/
if ( ! $found_theme ) {
$found_themes[ $dir ] = array(
'theme_file' => $dir . '/style.css',
'theme_root' => $theme_root,
);
}
}
}
}

asort( $found_themes );

$theme_roots = array();
$relative_theme_roots = array_flip( $relative_theme_roots );

foreach ( $found_themes as $theme_dir => $theme_data ) {
$theme_roots[ $theme_dir ] = $relative_theme_roots[ $theme_data['theme_root'] ]; // Convert absolute to relative.
}

if ( get_site_transient( 'theme_roots' ) !== $theme_roots ) {
set_site_transient( 'theme_roots', $theme_roots, $cache_expiration );
}

return $found_themes;
}

/**
* Retrieves path to themes directory.
*
* Does not have trailing slash.
*
* @since 1.5.0
*
* @global array $wp_theme_directories
*
* @param string $stylesheet_or_template Optional. The stylesheet or template name of the theme.
* Default is to leverage the main theme root.
* @return string Themes directory path.
*/
function get_theme_root( $stylesheet_or_template = '' ) {
global $wp_theme_directories;

$theme_root = '';

if ( $stylesheet_or_template ) {
$theme_root = get_raw_theme_root( $stylesheet_or_template );
if ( $theme_root ) {
/*
* Always prepend WP_CONTENT_DIR unless the root currently registered as a theme directory.
* This gives relative theme roots the benefit of the doubt when things go haywire.
*/
if ( ! in_array( $theme_root, (array) $wp_theme_directories, true ) ) {
$theme_root = WP_CONTENT_DIR . $theme_root;
}
}
}

if ( ! $theme_root ) {
$theme_root = WP_CONTENT_DIR . '/themes';
}

/**
* Filters the absolute path to the themes directory.
*
* @since 1.5.0
*
* @param string $theme_root Absolute path to themes directory.
*/
return apply_filters( 'theme_root', $theme_root );
}

/**
* Retrieves URI for themes directory.
*
* Does not have trailing slash.
*
* @since 1.5.0
*
* @global array $wp_theme_directories
*
* @param string $stylesheet_or_template Optional. The stylesheet or template name of the theme.
* Default is to leverage the main theme root.
* @param string $theme_root Optional. The theme root for which calculations will be based,
* preventing the need for a get_raw_theme_root() call. Default empty.
* @return string Themes directory URI.
*/
function get_theme_root_uri( $stylesheet_or_template = '', $theme_root = '' ) {
global $wp_theme_directories;

if ( $stylesheet_or_template && ! $theme_root ) {
$theme_root = get_raw_theme_root( $stylesheet_or_template );
}

if ( $stylesheet_or_template && $theme_root ) {
if ( in_array( $theme_root, (array) $wp_theme_directories, true ) ) {
// Absolute path. Make an educated guess. YMMV -- but note the filter below.
if ( str_starts_with( $theme_root, WP_CONTENT_DIR ) ) {
$theme_root_uri = content_url( str_replace( WP_CONTENT_DIR, '', $theme_root ) );
} elseif ( str_starts_with( $theme_root, ABSPATH ) ) {
$theme_root_uri = site_url( str_replace( ABSPATH, '', $theme_root ) );
} elseif ( str_starts_with( $theme_root, WP_PLUGIN_DIR ) || str_starts_with( $theme_root, WPMU_PLUGIN_DIR ) ) {
$theme_root_uri = plugins_url( basename( $theme_root ), $theme_root );
} else {
$theme_root_uri = $theme_root;
}
} else {
$theme_root_uri = content_url( $theme_root );
}
} else {
$theme_root_uri = content_url( 'themes' );
}

/**
* Filters the URI for themes directory.
*
* @since 1.5.0
*
* @param string $theme_root_uri The URI for themes directory.
* @param string $siteurl WordPress web address which is set in General Options.
* @param string $stylesheet_or_template The stylesheet or template name of the theme.
*/
return apply_filters( 'theme_root_uri', $theme_root_uri, get_option( 'siteurl' ), $stylesheet_or_template );
}

/**
* Gets the raw theme root relative to the content directory with no filters applied.
*
* @since 3.1.0
*
* @global array $wp_theme_directories
*
* @param string $stylesheet_or_template The stylesheet or template name of the theme.
* @param bool $skip_cache Optional. Whether to skip the cache.
* Defaults to false, meaning the cache is used.
* @return string Theme root.
*/
function get_raw_theme_root( $stylesheet_or_template, $skip_cache = false ) {
global $wp_theme_directories;

if ( ! is_array( $wp_theme_directories ) || count( $wp_theme_directories ) <= 1 ) {
return '/themes';
}

$theme_root = false;

// If requesting the root for the active theme, consult options to avoid calling get_theme_roots().
if ( ! $skip_cache ) {
if ( get_option( 'stylesheet' ) === $stylesheet_or_template ) {
$theme_root = get_option( 'stylesheet_root' );
} elseif ( get_option( 'template' ) === $stylesheet_or_template ) {
$theme_root = get_option( 'template_root' );
}
}

if ( empty( $theme_root ) ) {
$theme_roots = get_theme_roots();
if ( ! empty( $theme_roots[ $stylesheet_or_template ] ) ) {
$theme_root = $theme_roots[ $stylesheet_or_template ];
}
}

return $theme_root;
}

/**
* Displays localized stylesheet link element.
*
* @since 2.1.0
*/
function locale_stylesheet() {
$stylesheet = get_locale_stylesheet_uri();
if ( empty( $stylesheet ) ) {
return;
}

$type_attr = current_theme_supports( 'html5', 'style' ) ? '' : ' type="text/css"';

printf(
'<link rel="stylesheet" href="%s"%s media="screen" />',
$stylesheet,
$type_attr
);
}

/**
* Switches the theme.
*
* Accepts one argument: $stylesheet of the theme. It also accepts an additional function signature
* of two arguments: $template then $stylesheet. This is for backward compatibility.
*
* @since 2.5.0
*
* @global array $wp_theme_directories
* @global WP_Customize_Manager $wp_customize
* @global array $sidebars_widgets
* @global array $wp_registered_sidebars
*
* @param string $stylesheet Stylesheet name.
*/
function switch_theme( $stylesheet ) {
global $wp_theme_directories, $wp_customize, $sidebars_widgets, $wp_registered_sidebars;

$requirements = validate_theme_requirements( $stylesheet );
if ( is_wp_error( $requirements ) ) {
wp_die( $requirements );
}

$_sidebars_widgets = null;
if ( 'wp_ajax_customize_save' === current_action() ) {
$old_sidebars_widgets_data_setting = $wp_customize->get_setting( 'old_sidebars_widgets_data' );
if ( $old_sidebars_widgets_data_setting ) {
$_sidebars_widgets = $wp_customize->post_value( $old_sidebars_widgets_data_setting );
}
} elseif ( is_array( $sidebars_widgets ) ) {
$_sidebars_widgets = $sidebars_widgets;
}

if ( is_array( $_sidebars_widgets ) ) {
set_theme_mod(
'sidebars_widgets',
array(
'time' => time(),
'data' => $_sidebars_widgets,
)
);
}

$nav_menu_locations = get_theme_mod( 'nav_menu_locations' );
update_option( 'theme_switch_menu_locations', $nav_menu_locations, true );

if ( func_num_args() > 1 ) {
$stylesheet = func_get_arg( 1 );
}

$old_theme = wp_get_theme();
$new_theme = wp_get_theme( $stylesheet );
$template = $new_theme->get_template();

if ( wp_is_recovery_mode() ) {
$paused_themes = wp_paused_themes();
$paused_themes->delete( $old_theme->get_stylesheet() );
$paused_themes->delete( $old_theme->get_template() );
}

update_option( 'template', $template );
update_option( 'stylesheet', $stylesheet );

if ( count( $wp_theme_directories ) > 1 ) {
update_option( 'template_root', get_raw_theme_root( $template, true ) );
update_option( 'stylesheet_root', get_raw_theme_root( $stylesheet, true ) );
} else {
delete_option( 'template_root' );
delete_option( 'stylesheet_root' );
}

$new_name = $new_theme->get( 'Name' );

update_option( 'current_theme', $new_name );

// Migrate from the old mods_{name} option to theme_mods_{slug}.
if ( is_admin() && false === get_option( 'theme_mods_' . $stylesheet ) ) {
$default_theme_mods = (array) get_option( 'mods_' . $new_name );
if ( ! empty( $nav_menu_locations ) && empty( $default_theme_mods['nav_menu_locations'] ) ) {
$default_theme_mods['nav_menu_locations'] = $nav_menu_locations;
}
add_option( "theme_mods_$stylesheet", $default_theme_mods );
} else {
/*
* Since retrieve_widgets() is called when initializing a theme in the Customizer,
* we need to remove the theme mods to avoid overwriting changes made via
* the Customizer when accessing wp-admin/widgets.php.
*/
if ( 'wp_ajax_customize_save' === current_action() ) {
remove_theme_mod( 'sidebars_widgets' );
}
}

// Stores classic sidebars for later use by block themes.
if ( $new_theme->is_block_theme() ) {
set_theme_mod( 'wp_classic_sidebars', $wp_registered_sidebars );
}

update_option( 'theme_switched', $old_theme->get_stylesheet() );

/*
* Reset template globals when switching themes outside of a switched blog
* context to ensure templates will be loaded from the new theme.
*/
if ( ! is_multisite() || ! ms_is_switched() ) {
wp_set_template_globals();
}

// Clear pattern caches.
if ( ! is_multisite() ) {
$new_theme->delete_pattern_cache();
$old_theme->delete_pattern_cache();
}

// Set autoload=no for the old theme, autoload=yes for the switched theme.
$theme_mods_options = array(
'theme_mods_' . $stylesheet => 'yes',
'theme_mods_' . $old_theme->get_stylesheet() => 'no',
);
wp_set_option_autoload_values( $theme_mods_options );

/**
* Fires after the theme is switched.
*
* See {@see 'after_switch_theme'}.
*
* @since 1.5.0
* @since 4.5.0 Introduced the `$old_theme` parameter.
*
* @param string $new_name Name of the new theme.
* @param WP_Theme $new_theme WP_Theme instance of the new theme.
* @param WP_Theme $old_theme WP_Theme instance of the old theme.
*/
do_action( 'switch_theme', $new_name, $new_theme, $old_theme );
}

/**
* Checks that the active theme has the required files.
*
* Standalone themes need to have a `templates/index.html` or `index.php` template file.
* Child themes need to have a `Template` header in the `style.css` stylesheet.
*
* Does not initially check the default theme, which is the fallback and should always exist.
* But if it doesn't exist, it'll fall back to the latest core default theme that does exist.
* Will switch theme to the fallback theme if active theme does not validate.
*
* You can use the {@see 'validate_current_theme'} filter to return false to disable
* this functionality.
*
* @since 1.5.0
* @since 6.0.0 Removed the requirement for block themes to have an `index.php` template.
*
* @see WP_DEFAULT_THEME
*
* @return bool
*/
function validate_current_theme() {
/**
* Filters whether to validate the active theme.
*
* @since 2.7.0
*
* @param bool $validate Whether to validate the active theme. Default true.
*/
if ( wp_installing() || ! apply_filters( 'validate_current_theme', true ) ) {
return true;
}

if (
! file_exists( get_template_directory() . '/templates/index.html' )
&& ! file_exists( get_template_directory() . '/block-templates/index.html' ) // Deprecated path support since 5.9.0.
&& ! file_exists( get_template_directory() . '/index.php' )
) {
// Invalid.
} elseif ( ! file_exists( get_template_directory() . '/style.css' ) ) {
// Invalid.
} elseif ( is_child_theme() && ! file_exists( get_stylesheet_directory() . '/style.css' ) ) {
// Invalid.
} else {
// Valid.
return true;
}

$default = wp_get_theme( WP_DEFAULT_THEME );
if ( $default->exists() ) {
switch_theme( WP_DEFAULT_THEME );
return false;
}

/**
* If we're in an invalid state but WP_DEFAULT_THEME doesn't exist,
* switch to the latest core default theme that's installed.
*
* If it turns out that this latest core default theme is our current
* theme, then there's nothing we can do about that, so we have to bail,
* rather than going into an infinite loop. (This is why there are
* checks against WP_DEFAULT_THEME above, also.) We also can't do anything
* if it turns out there is no default theme installed. (That's `false`.)
*/
$default = WP_Theme::get_core_default_theme();
if ( false === $default || get_stylesheet() === $default->get_stylesheet() ) {
return true;
}

switch_theme( $default->get_stylesheet() );
return false;
}

/**
* Validates the theme requirements for WordPress version and PHP version.
*
* Uses the information from `Requires at least` and `Requires PHP` headers
* defined in the theme's `style.css` file.
*
* @since 5.5.0
* @since 5.8.0 Removed support for using `readme.txt` as a fallback.
*
* @param string $stylesheet Directory name for the theme.
* @return true|WP_Error True if requirements are met, WP_Error on failure.
*/
function validate_theme_requirements( $stylesheet ) {
$theme = wp_get_theme( $stylesheet );

$requirements = array(
'requires' => ! empty( $theme->get( 'RequiresWP' ) ) ? $theme->get( 'RequiresWP' ) : '',
'requires_php' => ! empty( $theme->get( 'RequiresPHP' ) ) ? $theme->get( 'RequiresPHP' ) : '',
);

$compatible_wp = is_wp_version_compatible( $requirements['requires'] );
$compatible_php = is_php_version_compatible( $requirements['requires_php'] );

if ( ! $compatible_wp && ! $compatible_php ) {
return new WP_Error(
'theme_wp_php_incompatible',
sprintf(
/* translators: %s: Theme name. */
_x( '<strong>Error:</strong> Current WordPress and PHP versions do not meet minimum requirements for %s.', 'theme' ),
$theme->display( 'Name' )
)
);
} elseif ( ! $compatible_php ) {
return new WP_Error(
'theme_php_incompatible',
sprintf(
/* translators: %s: Theme name. */
_x( '<strong>Error:</strong> Current PHP version does not meet minimum requirements for %s.', 'theme' ),
$theme->display( 'Name' )
)
);
} elseif ( ! $compatible_wp ) {
return new WP_Error(
'theme_wp_incompatible',
sprintf(
/* translators: %s: Theme name. */
_x( '<strong>Error:</strong> Current WordPress version does not meet minimum requirements for %s.', 'theme' ),
$theme->display( 'Name' )
)
);
}

return true;
}

/**
* Retrieves all theme modifications.
*
* @since 3.1.0
* @since 5.9.0 The return value is always an array.
*
* @return array Theme modifications.
*/
function get_theme_mods() {
$theme_slug = get_option( 'stylesheet' );
$mods = get_option( "theme_mods_$theme_slug" );

if ( false === $mods ) {
$theme_name = get_option( 'current_theme' );
if ( false === $theme_name ) {
$theme_name = wp_get_theme()->get( 'Name' );
}

$mods = get_option( "mods_$theme_name" ); // Deprecated location.
if ( is_admin() && false !== $mods ) {
update_option( "theme_mods_$theme_slug", $mods );
delete_option( "mods_$theme_name" );
}
}

if ( ! is_array( $mods ) ) {
$mods = array();
}

return $mods;
}

/**
* Retrieves theme modification value for the active theme.
*
* If the modification name does not exist and `$default_value` is a string, then the
* default will be passed through the {@link https://www.php.net/sprintf sprintf()}
* PHP function with the template directory URI as the first value and the
* stylesheet directory URI as the second value.
*
* @since 2.1.0
*
* @param string $name Theme modification name.
* @param mixed $default_value Optional. Theme modification default value. Default false.
* @return mixed Theme modification value.
*/
function get_theme_mod( $name, $default_value = false ) {
$mods = get_theme_mods();

if ( isset( $mods[ $name ] ) ) {
/**
* Filters the theme modification, or 'theme_mod', value.
*
* The dynamic portion of the hook name, `$name`, refers to the key name
* of the modification array. For example, 'header_textcolor', 'header_image',
* and so on depending on the theme options.
*
* @since 2.2.0
*
* @param mixed $current_mod The value of the active theme modification.
*/
return apply_filters( "theme_mod_{$name}", $mods[ $name ] );
}

if ( is_string( $default_value ) ) {
// Only run the replacement if an sprintf() string format pattern was found.
if ( preg_match( '#(?<!%)%(?:\d+\$?)?s#', $default_value ) ) {
// Remove a single trailing percent sign.
$default_value = preg_replace( '#(?<!%)%$#', '', $default_value );
$default_value = sprintf( $default_value, get_template_directory_uri(), get_stylesheet_directory_uri() );
}
}

/** This filter is documented in wp-includes/theme.php */
return apply_filters( "theme_mod_{$name}", $default_value );
}

/**
* Updates theme modification value for the active theme.
*
* @since 2.1.0
* @since 5.6.0 A return value was added.
*
* @param string $name Theme modification name.
* @param mixed $value Theme modification value.
* @return bool True if the value was updated, false otherwise.
*/
function set_theme_mod( $name, $value ) {
$mods = get_theme_mods();
$old_value = isset( $mods[ $name ] ) ? $mods[ $name ] : false;

/**
* Filters the theme modification, or 'theme_mod', value on save.
*
* The dynamic portion of the hook name, `$name`, refers to the key name
* of the modification array. For example, 'header_textcolor', 'header_image',
* and so on depending on the theme options.
*
* @since 3.9.0
*
* @param mixed $value The new value of the theme modification.
* @param mixed $old_value The current value of the theme modification.
*/
$mods[ $name ] = apply_filters( "pre_set_theme_mod_{$name}", $value, $old_value );

$theme = get_option( 'stylesheet' );

return update_option( "theme_mods_$theme", $mods );
}

/**
* Removes theme modification name from active theme list.
*
* If removing the name also removes all elements, then the entire option
* will be removed.
*
* @since 2.1.0
*
* @param string $name Theme modification name.
*/
function remove_theme_mod( $name ) {
$mods = get_theme_mods();

if ( ! isset( $mods[ $name ] ) ) {
return;
}

unset( $mods[ $name ] );

if ( empty( $mods ) ) {
remove_theme_mods();
return;
}

$theme = get_option( 'stylesheet' );

update_option( "theme_mods_$theme", $mods );
}

/**
* Removes theme modifications option for the active theme.
*
* @since 2.1.0
*/
function remove_theme_mods() {
delete_option( 'theme_mods_' . get_option( 'stylesheet' ) );

// Old style.
$theme_name = get_option( 'current_theme' );
if ( false === $theme_name ) {
$theme_name = wp_get_theme()->get( 'Name' );
}

delete_option( 'mods_' . $theme_name );
}

/**
* Retrieves the custom header text color in 3- or 6-digit hexadecimal form.
*
* @since 2.1.0
*
* @return string Header text color in 3- or 6-digit hexadecimal form (minus the hash symbol).
*/
function get_header_textcolor() {
return get_theme_mod( 'header_textcolor', get_theme_support( 'custom-header', 'default-text-color' ) );
}

/**
* Displays the custom header text color in 3- or 6-digit hexadecimal form (minus the hash symbol).
*
* @since 2.1.0
*/
function header_textcolor() {
echo get_header_textcolor();
}

/**
* Whether to display the header text.
*
* @since 3.4.0
*
* @return bool
*/
function display_header_text() {
if ( ! current_theme_supports( 'custom-header', 'header-text' ) ) {
return false;
}

$text_color = get_theme_mod( 'header_textcolor', get_theme_support( 'custom-header', 'default-text-color' ) );
return 'blank' !== $text_color;
}

/**
* Checks whether a header image is set or not.
*
* @since 4.2.0
*
* @see get_header_image()
*
* @return bool Whether a header image is set or not.
*/
function has_header_image() {
return (bool) get_header_image();
}

/**
* Retrieves header image for custom header.
*
* @since 2.1.0
*
* @return string|false
*/
function get_header_image() {
$url = get_theme_mod( 'header_image', get_theme_support( 'custom-header', 'default-image' ) );

if ( 'remove-header' === $url ) {
return false;
}

if ( is_random_header_image() ) {
$url = get_random_header_image();
}

/**
* Filters the header image URL.
*
* @since 6.1.0
*
* @param string $url Header image URL.
*/
$url = apply_filters( 'get_header_image', $url );

if ( ! is_string( $url ) ) {
return false;
}

$url = trim( $url );
return sanitize_url( set_url_scheme( $url ) );
}

/**
* Creates image tag markup for a custom header image.
*
* @since 4.4.0
*
* @param array $attr Optional. Additional attributes for the image tag. Can be used
* to override the default attributes. Default empty.
* @return string HTML image element markup or empty string on failure.
*/
function get_header_image_tag( $attr = array() ) {
$header = get_custom_header();
$header->url = get_header_image();

if ( ! $header->url ) {
return '';
}

$width = absint( $header->width );
$height = absint( $header->height );
$alt = '';

// Use alternative text assigned to the image, if available. Otherwise, leave it empty.
if ( ! empty( $header->attachment_id ) ) {
$image_alt = get_post_meta( $header->attachment_id, '_wp_attachment_image_alt', true );

if ( is_string( $image_alt ) ) {
$alt = $image_alt;
}
}

$attr = wp_parse_args(
$attr,
array(
'src' => $header->url,
'width' => $width,
'height' => $height,
'alt' => $alt,
)
);

// Generate 'srcset' and 'sizes' if not already present.
if ( empty( $attr['srcset'] ) && ! empty( $header->attachment_id ) ) {
$image_meta = get_post_meta( $header->attachment_id, '_wp_attachment_metadata', true );
$size_array = array( $width, $height );

if ( is_array( $image_meta ) ) {
$srcset = wp_calculate_image_srcset( $size_array, $header->url, $image_meta, $header->attachment_id );

if ( ! empty( $attr['sizes'] ) ) {
$sizes = $attr['sizes'];
} else {
$sizes = wp_calculate_image_sizes( $size_array, $header->url, $image_meta, $header->attachment_id );
}

if ( $srcset && $sizes ) {
$attr['srcset'] = $srcset;
$attr['sizes'] = $sizes;
}
}
}

$attr = array_merge(
$attr,
wp_get_loading_optimization_attributes( 'img', $attr, 'get_header_image_tag' )
);

/*
* If the default value of `lazy` for the `loading` attribute is overridden
* to omit the attribute for this image, ensure it is not included.
*/
if ( isset( $attr['loading'] ) && ! $attr['loading'] ) {
unset( $attr['loading'] );
}

// If the `fetchpriority` attribute is overridden and set to false or an empty string.
if ( isset( $attr['fetchpriority'] ) && ! $attr['fetchpriority'] ) {
unset( $attr['fetchpriority'] );
}

// If the `decoding` attribute is overridden and set to false or an empty string.
if ( isset( $attr['decoding'] ) && ! $attr['decoding'] ) {
unset( $attr['decoding'] );
}

/**
* Filters the list of header image attributes.
*
* @since 5.9.0
*
* @param array $attr Array of the attributes for the image tag.
* @param object $header The custom header object returned by 'get_custom_header()'.
*/
$attr = apply_filters( 'get_header_image_tag_attributes', $attr, $header );

$attr = array_map( 'esc_attr', $attr );
$html = '<img';

foreach ( $attr as $name => $value ) {
$html .= ' ' . $name . '="' . $value . '"';
}

$html .= ' />';

/**
* Filters the markup of header images.
*
* @since 4.4.0
*
* @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 apply_filters( 'get_header_image_tag', $html, $header, $attr );
}

/**
* Displays the image markup for a custom header image.
*
* @since 4.4.0
*
* @param array $attr Optional. Attributes for the image markup. Default empty.
*/
function the_header_image_tag( $attr = array() ) {
echo get_header_image_tag( $attr );
}

/**
* Gets random header image data from registered images in theme.
*
* @since 3.4.0
*
* @access private
*
* @global array $_wp_default_headers
*
* @return object
*/
function _get_random_header_data() {
global $_wp_default_headers;
static $_wp_random_header = null;

if ( empty( $_wp_random_header ) ) {
$header_image_mod = get_theme_mod( 'header_image', '' );
$headers = array();

if ( 'random-uploaded-image' === $header_image_mod ) {
$headers = get_uploaded_header_images();
} elseif ( ! empty( $_wp_default_headers ) ) {
if ( 'random-default-image' === $header_image_mod ) {
$headers = $_wp_default_headers;
} else {
if ( current_theme_supports( 'custom-header', 'random-default' ) ) {
$headers = $_wp_default_headers;
}
}
}

if ( empty( $headers ) ) {
return new stdClass();
}

$_wp_random_header = (object) $headers[ array_rand( $headers ) ];

$_wp_random_header->url = sprintf(
$_wp_random_header->url,
get_template_directory_uri(),
get_stylesheet_directory_uri()
);

$_wp_random_header->thumbnail_url = sprintf(
$_wp_random_header->thumbnail_url,
get_template_directory_uri(),
get_stylesheet_directory_uri()
);
}

return $_wp_random_header;
}

/**
* Gets random header image URL from registered images in theme.
*
* @since 3.2.0
*
* @return string Path to header image.
*/
function get_random_header_image() {
$random_image = _get_random_header_data();

if ( empty( $random_image->url ) ) {
return '';
}

return $random_image->url;
}

/**
* Checks if random header image is in use.
*
* Always true if user expressly chooses the option in Appearance > Header.
* Also true if theme has multiple header images registered, no specific header image
* is chosen, and theme turns on random headers with add_theme_support().
*
* @since 3.2.0
*
* @param string $type The random pool to use. Possible values include 'any',
* 'default', 'uploaded'. Default 'any'.
* @return bool
*/
function is_random_header_image( $type = 'any' ) {
$header_image_mod = get_theme_mod( 'header_image', get_theme_support( 'custom-header', 'default-image' ) );

if ( 'any' === $type ) {
if ( 'random-default-image' === $header_image_mod
|| 'random-uploaded-image' === $header_image_mod
|| ( empty( $header_image_mod ) && '' !== get_random_header_image() )
) {
return true;
}
} else {
if ( "random-$type-image" === $header_image_mod ) {
return true;
} elseif ( 'default' === $type
&& empty( $header_image_mod ) && '' !== get_random_header_image()
) {
return true;
}
}

return false;
}

/**
* Displays header image URL.
*
* @since 2.1.0
*/
function header_image() {
$image = get_header_image();

if ( $image ) {
echo esc_url( $image );
}
}

/**
* Gets the header images uploaded for the active theme.
*
* @since 3.2.0
*
* @return array
*/
function get_uploaded_header_images() {
$header_images = array();

// @todo Caching.
$headers = get_posts(
array(
'post_type' => 'attachment',
'meta_key' => '_wp_attachment_is_custom_header',
'meta_value' => get_option( 'stylesheet' ),
'orderby' => 'none',
'nopaging' => true,
)
);

if ( empty( $headers ) ) {
return array();
}

foreach ( (array) $headers as $header ) {
$url = sanitize_url( wp_get_attachment_url( $header->ID ) );
$header_data = wp_get_attachment_metadata( $header->ID );
$header_index = $header->ID;

$header_images[ $header_index ] = array();
$header_images[ $header_index ]['attachment_id'] = $header->ID;
$header_images[ $header_index ]['url'] = $url;
$header_images[ $header_index ]['thumbnail_url'] = $url;
$header_images[ $header_index ]['alt_text'] = get_post_meta( $header->ID, '_wp_attachment_image_alt', true );

if ( isset( $header_data['attachment_parent'] ) ) {
$header_images[ $header_index ]['attachment_parent'] = $header_data['attachment_parent'];
} else {
$header_images[ $header_index ]['attachment_parent'] = '';
}

if ( isset( $header_data['width'] ) ) {
$header_images[ $header_index ]['width'] = $header_data['width'];
}
if ( isset( $header_data['height'] ) ) {
$header_images[ $header_index ]['height'] = $header_data['height'];
}
}

return $header_images;
}

/**
* Gets the header image data.
*
* @since 3.4.0
*
* @global array $_wp_default_headers
*
* @return object
*/
function get_custom_header() {
global $_wp_default_headers;

if ( is_random_header_image() ) {
$data = _get_random_header_data();
} else {
$data = get_theme_mod( 'header_image_data' );
if ( ! $data && current_theme_supports( 'custom-header', 'default-image' ) ) {
$directory_args = array( get_template_directory_uri(), get_stylesheet_directory_uri() );
$data = array();
$data['url'] = vsprintf( get_theme_support( 'custom-header', 'default-image' ), $directory_args );
$data['thumbnail_url'] = $data['url'];
if ( ! empty( $_wp_default_headers ) ) {
foreach ( (array) $_wp_default_headers as $default_header ) {
$url = vsprintf( $default_header['url'], $directory_args );
if ( $data['url'] === $url ) {
$data = $default_header;
$data['url'] = $url;
$data['thumbnail_url'] = vsprintf( $data['thumbnail_url'], $directory_args );
break;
}
}
}
}
}

$default = array(
'url' => '',
'thumbnail_url' => '',
'width' => get_theme_support( 'custom-header', 'width' ),
'height' => get_theme_support( 'custom-header', 'height' ),
'video' => get_theme_support( 'custom-header', 'video' ),
);
return (object) wp_parse_args( $data, $default );
}

/**
* Registers a selection of default headers to be displayed by the custom header admin UI.
*
* @since 3.0.0
*
* @global array $_wp_default_headers
*
* @param array $headers Array of headers keyed by a string ID. The IDs point to arrays
* containing 'url', 'thumbnail_url', and 'description' keys.
*/
function register_default_headers( $headers ) {
global $_wp_default_headers;

$_wp_default_headers = array_merge( (array) $_wp_default_headers, (array) $headers );
}

/**
* Unregisters default headers.
*
* This function must be called after register_default_headers() has already added the
* header you want to remove.
*
* @see register_default_headers()
* @since 3.0.0
*
* @global array $_wp_default_headers
*
* @param string|array $header The header string id (key of array) to remove, or an array thereof.
* @return bool|void A single header returns true on success, false on failure.
* There is currently no return value for multiple headers.
*/
function unregister_default_headers( $header ) {
global $_wp_default_headers;

if ( is_array( $header ) ) {
array_map( 'unregister_default_headers', $header );
} elseif ( isset( $_wp_default_headers[ $header ] ) ) {
unset( $_wp_default_headers[ $header ] );
return true;
} else {
return false;
}
}

/**
* Checks whether a header video is set or not.
*
* @since 4.7.0
*
* @see get_header_video_url()
*
* @return bool Whether a header video is set or not.
*/
function has_header_video() {
return (bool) get_header_video_url();
}

/**
* Retrieves header video URL for custom header.
*
* Uses a local video if present, or falls back to an external video.
*
* @since 4.7.0
*
* @return string|false Header video URL or false if there is no video.
*/
function get_header_video_url() {
$id = absint( get_theme_mod( 'header_video' ) );

if ( $id ) {
// Get the file URL from the attachment ID.
$url = wp_get_attachment_url( $id );
} else {
$url = get_theme_mod( 'external_header_video' );
}

/**
* Filters the header video URL.
*
* @since 4.7.3
*
* @param string $url Header video URL, if available.
*/
$url = apply_filters( 'get_header_video_url', $url );

if ( ! $id && ! $url ) {
return false;
}

return sanitize_url( set_url_scheme( $url ) );
}

/**
* Displays header video URL.
*
* @since 4.7.0
*/
function the_header_video_url() {
$video = get_header_video_url();

if ( $video ) {
echo esc_url( $video );
}
}

/**
* Retrieves header video settings.
*
* @since 4.7.0
*
* @return array
*/
function get_header_video_settings() {
$header = get_custom_header();
$video_url = get_header_video_url();
$video_type = wp_check_filetype( $video_url, wp_get_mime_types() );

$settings = array(
'mimeType' => '',
'posterUrl' => get_header_image(),
'videoUrl' => $video_url,
'width' => absint( $header->width ),
'height' => absint( $header->height ),
'minWidth' => 900,
'minHeight' => 500,
'l10n' => array(
'pause' => __( 'Pause' ),
'play' => __( 'Play' ),
'pauseSpeak' => __( 'Video is paused.' ),
'playSpeak' => __( 'Video is playing.' ),
),
);

if ( preg_match( '#^https?://(?:www\.)?(?:youtube\.com/watch|youtu\.be/)#', $video_url ) ) {
$settings['mimeType'] = 'video/x-youtube';
} elseif ( ! empty( $video_type['type'] ) ) {
$settings['mimeType'] = $video_type['type'];
}

/**
* Filters header video settings.
*
* @since 4.7.0
*
* @param array $settings An array of header video settings.
*/
return apply_filters( 'header_video_settings', $settings );
}

/**
* Checks whether a custom header is set or not.
*
* @since 4.7.0
*
* @return bool True if a custom header is set. False if not.
*/
function has_custom_header() {
if ( has_header_image() || ( has_header_video() && is_header_video_active() ) ) {
return true;
}

return false;
}

/**
* Checks whether the custom header video is eligible to show on the current page.
*
* @since 4.7.0
*
* @return bool True if the custom header video should be shown. False if not.
*/
function is_header_video_active() {
if ( ! get_theme_support( 'custom-header', 'video' ) ) {
return false;
}

$video_active_cb = get_theme_support( 'custom-header', 'video-active-callback' );

if ( empty( $video_active_cb ) || ! is_callable( $video_active_cb ) ) {
$show_video = true;
} else {
$show_video = call_user_func( $video_active_cb );
}

/**
* Filters whether the custom header video is eligible to show on the current page.
*
* @since 4.7.0
*
* @param bool $show_video Whether the custom header video should be shown. Returns the value
* of the theme setting for the `custom-header`'s `video-active-callback`.
* If no callback is set, the default value is that of `is_front_page()`.
*/
return apply_filters( 'is_header_video_active', $show_video );
}

/**
* Retrieves the markup for a custom header.
*
* The container div will always be returned in the Customizer preview.
*
* @since 4.7.0
*
* @return string The markup for a custom header on success.
*/
function get_custom_header_markup() {
if ( ! has_custom_header() && ! is_customize_preview() ) {
return '';
}

return sprintf(
'<div id="wp-custom-header" class="wp-custom-header">%s</div>',
get_header_image_tag()
);
}

/**
* Prints the markup for a custom header.
*
* A container div will always be printed in the Customizer preview.
*
* @since 4.7.0
*/
function the_custom_header_markup() {
$custom_header = get_custom_header_markup();
if ( empty( $custom_header ) ) {
return;
}

echo $custom_header;

if ( is_header_video_active() && ( has_header_video() || is_customize_preview() ) ) {
wp_enqueue_script( 'wp-custom-header' );
wp_localize_script( 'wp-custom-header', '_wpCustomHeaderSettings', get_header_video_settings() );
}
}

/**
* Retrieves background image for custom background.
*
* @since 3.0.0
*
* @return string
*/
function get_background_image() {
return get_theme_mod( 'background_image', get_theme_support( 'custom-background', 'default-image' ) );
}

/**
* Displays background image path.
*
* @since 3.0.0
*/
function background_image() {
echo get_background_image();
}

/**
* Retrieves value for custom background color.
*
* @since 3.0.0
*
* @return string
*/
function get_background_color() {
return get_theme_mod( 'background_color', get_theme_support( 'custom-background', 'default-color' ) );
}

/**
* Displays background color value.
*
* @since 3.0.0
*/
function background_color() {
echo get_background_color();
}

/**
* Default custom background callback.
*
* @since 3.0.0
*/
function _custom_background_cb() {
// $background is the saved custom image, or the default image.
$background = set_url_scheme( get_background_image() );

/*
* $color is the saved custom color.
* A default has to be specified in style.css. It will not be printed here.
*/
$color = get_background_color();

if ( get_theme_support( 'custom-background', 'default-color' ) === $color ) {
$color = false;
}

$type_attr = current_theme_supports( 'html5', 'style' ) ? '' : ' type="text/css"';

if ( ! $background && ! $color ) {
if ( is_customize_preview() ) {
printf( '<style%s id="custom-background-css"></style>', $type_attr );
}
return;
}

$style = $color ? "background-color: #$color;" : '';

if ( $background ) {
$image = ' background-image: url("' . sanitize_url( $background ) . '");';

// Background Position.
$position_x = get_theme_mod( 'background_position_x', get_theme_support( 'custom-background', 'default-position-x' ) );
$position_y = get_theme_mod( 'background_position_y', get_theme_support( 'custom-background', 'default-position-y' ) );

if ( ! in_array( $position_x, array( 'left', 'center', 'right' ), true ) ) {
$position_x = 'left';
}

if ( ! in_array( $position_y, array( 'top', 'center', 'bottom' ), true ) ) {
$position_y = 'top';
}

$position = " background-position: $position_x $position_y;";

// Background Size.
$size = get_theme_mod( 'background_size', get_theme_support( 'custom-background', 'default-size' ) );

if ( ! in_array( $size, array( 'auto', 'contain', 'cover' ), true ) ) {
$size = 'auto';
}

$size = " background-size: $size;";

// Background Repeat.
$repeat = get_theme_mod( 'background_repeat', get_theme_support( 'custom-background', 'default-repeat' ) );

if ( ! in_array( $repeat, array( 'repeat-x', 'repeat-y', 'repeat', 'no-repeat' ), true ) ) {
$repeat = 'repeat';
}

$repeat = " background-repeat: $repeat;";

// Background Scroll.
$attachment = get_theme_mod( 'background_attachment', get_theme_support( 'custom-background', 'default-attachment' ) );

if ( 'fixed' !== $attachment ) {
$attachment = 'scroll';
}

$attachment = " background-attachment: $attachment;";

$style .= $image . $position . $size . $repeat . $attachment;
}
?>
<style<?php echo $type_attr; ?> id="custom-background-css">
body.custom-background { <?php echo trim( $style ); ?> }
</style>
<?php
}

/**
* Renders the Custom CSS style element.
*
* @since 4.7.0
*/
function wp_custom_css_cb() {
$styles = wp_get_custom_css();
if ( $styles || is_customize_preview() ) :
$type_attr = current_theme_supports( 'html5', 'style' ) ? '' : ' type="text/css"';
?>
<style<?php echo $type_attr; ?> id="wp-custom-css">
<?php
// Note that esc_html() cannot be used because `div &gt; span` is not interpreted properly.
echo strip_tags( $styles );
?>
</style>
<?php
endif;
}

/**
* Fetches the `custom_css` post for a given theme.
*
* @since 4.7.0
*
* @param string $stylesheet Optional. A theme object stylesheet name. Defaults to the active theme.
* @return WP_Post|null The custom_css post or null if none exists.
*/
function wp_get_custom_css_post( $stylesheet = '' ) {
if ( empty( $stylesheet ) ) {
$stylesheet = get_stylesheet();
}

$custom_css_query_vars = array(
'post_type' => 'custom_css',
'post_status' => get_post_stati(),
'name' => sanitize_title( $stylesheet ),
'posts_per_page' => 1,
'no_found_rows' => true,
'cache_results' => true,
'update_post_meta_cache' => false,
'update_post_term_cache' => false,
'lazy_load_term_meta' => false,
);

$post = null;
if ( get_stylesheet() === $stylesheet ) {
$post_id = get_theme_mod( 'custom_css_post_id' );

if ( $post_id > 0 && get_post( $post_id ) ) {
$post = get_post( $post_id );
}

// `-1` indicates no post exists; no query necessary.
if ( ! $post && -1 !== $post_id ) {
$query = new WP_Query( $custom_css_query_vars );
$post = $query->post;
/*
* Cache the lookup. See wp_update_custom_css_post().
* @todo This should get cleared if a custom_css post is added/removed.
*/
set_theme_mod( 'custom_css_post_id', $post ? $post->ID : -1 );
}
} else {
$query = new WP_Query( $custom_css_query_vars );
$post = $query->post;
}

return $post;
}

/**
* Fetches the saved Custom CSS content for rendering.
*
* @since 4.7.0
*
* @param string $stylesheet Optional. A theme object stylesheet name. Defaults to the active theme.
* @return string The Custom CSS Post content.
*/
function wp_get_custom_css( $stylesheet = '' ) {
$css = '';

if ( empty( $stylesheet ) ) {
$stylesheet = get_stylesheet();
}

$post = wp_get_custom_css_post( $stylesheet );
if ( $post ) {
$css = $post->post_content;
}

/**
* Filters the custom CSS output into the head element.
*
* @since 4.7.0
*
* @param string $css CSS pulled in from the Custom CSS post type.
* @param string $stylesheet The theme stylesheet name.
*/
$css = apply_filters( 'wp_get_custom_css', $css, $stylesheet );

return $css;
}

/**
* Updates the `custom_css` post for a given theme.
*
* Inserts a `custom_css` post when one doesn't yet exist.
*
* @since 4.7.0
*
* @param string $css CSS, stored in `post_content`.
* @param array $args {
* Args.
*
* @type string $preprocessed Optional. Pre-processed CSS, stored in `post_content_filtered`.
* Normally empty string.
* @type string $stylesheet Optional. Stylesheet (child theme) to update.
* Defaults to active theme/stylesheet.
* }
* @return WP_Post|WP_Error Post on success, error on failure.
*/
function wp_update_custom_css_post( $css, $args = array() ) {
$args = wp_parse_args(
$args,
array(
'preprocessed' => '',
'stylesheet' => get_stylesheet(),
)
);

$data = array(
'css' => $css,
'preprocessed' => $args['preprocessed'],
);

/**
* Filters the `css` (`post_content`) and `preprocessed` (`post_content_filtered`) args
* for a `custom_css` post being updated.
*
* This filter can be used by plugin that offer CSS pre-processors, to store the original
* pre-processed CSS in `post_content_filtered` and then store processed CSS in `post_content`.
* When used in this way, the `post_content_filtered` should be supplied as the setting value
* instead of `post_content` via a the `customize_value_custom_css` filter, for example:
*
* <code>
* add_filter( 'customize_value_custom_css', function( $value, $setting ) {
* $post = wp_get_custom_css_post( $setting->stylesheet );
* if ( $post && ! empty( $post->post_content_filtered ) ) {
* $css = $post->post_content_filtered;
* }
* return $css;
* }, 10, 2 );
* </code>
*
* @since 4.7.0
* @param array $data {
* Custom CSS data.
*
* @type string $css CSS stored in `post_content`.
* @type string $preprocessed Pre-processed CSS stored in `post_content_filtered`.
* Normally empty string.
* }
* @param array $args {
* The args passed into `wp_update_custom_css_post()` merged with defaults.
*
* @type string $css The original CSS passed in to be updated.
* @type string $preprocessed The original preprocessed CSS passed in to be updated.
* @type string $stylesheet The stylesheet (theme) being updated.
* }
*/
$data = apply_filters( 'update_custom_css_data', $data, array_merge( $args, compact( 'css' ) ) );

$post_data = array(
'post_title' => $args['stylesheet'],
'post_name' => sanitize_title( $args['stylesheet'] ),
'post_type' => 'custom_css',
'post_status' => 'publish',
'post_content' => $data['css'],
'post_content_filtered' => $data['preprocessed'],
);

// Update post if it already exists, otherwise create a new one.
$post = wp_get_custom_css_post( $args['stylesheet'] );
if ( $post ) {
$post_data['ID'] = $post->ID;
$r = wp_update_post( wp_slash( $post_data ), true );
} else {
$r = wp_insert_post( wp_slash( $post_data ), true );

if ( ! is_wp_error( $r ) ) {
if ( get_stylesheet() === $args['stylesheet'] ) {
set_theme_mod( 'custom_css_post_id', $r );
}

// Trigger creation of a revision. This should be removed once #30854 is resolved.
$revisions = wp_get_latest_revision_id_and_total_count( $r );
if ( ! is_wp_error( $revisions ) && 0 === $revisions['count'] ) {
wp_save_post_revision( $r );
}
}
}

if ( is_wp_error( $r ) ) {
return $r;
}
return get_post( $r );
}

/**
* Adds callback for custom TinyMCE editor stylesheets.
*
* The parameter $stylesheet is the name of the stylesheet, relative to
* the theme root. It also accepts an array of stylesheets.
* It is optional and defaults to 'editor-style.css'.
*
* This function automatically adds another stylesheet with -rtl prefix, e.g. editor-style-rtl.css.
* If that file doesn't exist, it is removed before adding the stylesheet(s) to TinyMCE.
* If an array of stylesheets is passed to add_editor_style(),
* RTL is only added for the first stylesheet.
*
* Since version 3.4 the TinyMCE body has .rtl CSS class.
* It is a better option to use that class and add any RTL styles to the main stylesheet.
*
* @since 3.0.0
*
* @global array $editor_styles
*
* @param array|string $stylesheet Optional. Stylesheet name or array thereof, relative to theme root.
* Defaults to 'editor-style.css'
*/
function add_editor_style( $stylesheet = 'editor-style.css' ) {
global $editor_styles;

add_theme_support( 'editor-style' );

$editor_styles = (array) $editor_styles;
$stylesheet = (array) $stylesheet;

if ( is_rtl() ) {
$rtl_stylesheet = str_replace( '.css', '-rtl.css', $stylesheet[0] );
$stylesheet[] = $rtl_stylesheet;
}

$editor_styles = array_merge( $editor_styles, $stylesheet );
}

/**
* Removes all visual editor stylesheets.
*
* @since 3.1.0
*
* @global array $editor_styles
*
* @return bool True on success, false if there were no stylesheets to remove.
*/
function remove_editor_styles() {
if ( ! current_theme_supports( 'editor-style' ) ) {
return false;
}
_remove_theme_support( 'editor-style' );
if ( is_admin() ) {
$GLOBALS['editor_styles'] = array();
}
return true;
}

/**
* Retrieves any registered editor stylesheet URLs.
*
* @since 4.0.0
*
* @global array $editor_styles Registered editor stylesheets
*
* @return string[] If registered, a list of editor stylesheet URLs.
*/
function get_editor_stylesheets() {
$stylesheets = array();
// Load editor_style.css if the active theme supports it.
if ( ! empty( $GLOBALS['editor_styles'] ) && is_array( $GLOBALS['editor_styles'] ) ) {
$editor_styles = $GLOBALS['editor_styles'];

$editor_styles = array_unique( array_filter( $editor_styles ) );
$style_uri = get_stylesheet_directory_uri();
$style_dir = get_stylesheet_directory();

// Support externally referenced styles (like, say, fonts).
foreach ( $editor_styles as $key => $file ) {
if ( preg_match( '~^(https?:)?//~', $file ) ) {
$stylesheets[] = sanitize_url( $file );
unset( $editor_styles[ $key ] );
}
}

// Look in a parent theme first, that way child theme CSS overrides.
if ( is_child_theme() ) {
$template_uri = get_template_directory_uri();
$template_dir = get_template_directory();

foreach ( $editor_styles as $key => $file ) {
if ( $file && file_exists( "$template_dir/$file" ) ) {
$stylesheets[] = "$template_uri/$file";
}
}
}

foreach ( $editor_styles as $file ) {
if ( $file && file_exists( "$style_dir/$file" ) ) {
$stylesheets[] = "$style_uri/$file";
}
}
}

/**
* Filters the array of URLs of stylesheets applied to the editor.
*
* @since 4.3.0
*
* @param string[] $stylesheets Array of URLs of stylesheets to be applied to the editor.
*/
return apply_filters( 'editor_stylesheets', $stylesheets );
}

/**
* Expands a theme's starter content configuration using core-provided data.
*
* @since 4.7.0
*
* @return array Array of starter content.
*/
function get_theme_starter_content() {
$theme_support = get_theme_support( 'starter-content' );
if ( is_array( $theme_support ) && ! empty( $theme_support[0] ) && is_array( $theme_support[0] ) ) {
$config = $theme_support[0];
} else {
$config = array();
}

$core_content = array(
'widgets' => array(
'text_business_info' => array(
'text',
array(
'title' => _x( 'Find Us', 'Theme starter content' ),
'text' => implode(
'',
array(
'<strong>' . _x( 'Address', 'Theme starter content' ) . "</strong>\n",
_x( '123 Main Street', 'Theme starter content' ) . "\n",
_x( 'New York, NY 10001', 'Theme starter content' ) . "\n\n",
'<strong>' . _x( 'Hours', 'Theme starter content' ) . "</strong>\n",
_x( 'Monday&ndash;Friday: 9:00AM&ndash;5:00PM', 'Theme starter content' ) . "\n",
_x( 'Saturday &amp; Sunday: 11:00AM&ndash;3:00PM', 'Theme starter content' ),
)
),
'filter' => true,
'visual' => true,
),
),
'text_about' => array(
'text',
array(
'title' => _x( 'About This Site', 'Theme starter content' ),
'text' => _x( 'This may be a good place to introduce yourself and your site or include some credits.', 'Theme starter content' ),
'filter' => true,
'visual' => true,
),
),
'archives' => array(
'archives',
array(
'title' => _x( 'Archives', 'Theme starter content' ),
),
),
'calendar' => array(
'calendar',
array(
'title' => _x( 'Calendar', 'Theme starter content' ),
),
),
'categories' => array(
'categories',
array(
'title' => _x( 'Categories', 'Theme starter content' ),
),
),
'meta' => array(
'meta',
array(
'title' => _x( 'Meta', 'Theme starter content' ),
),
),
'recent-comments' => array(
'recent-comments',
array(
'title' => _x( 'Recent Comments', 'Theme starter content' ),
),
),
'recent-posts' => array(
'recent-posts',
array(
'title' => _x( 'Recent Posts', 'Theme starter content' ),
),
),
'search' => array(
'search',
array(
'title' => _x( 'Search', 'Theme starter content' ),
),
),
),
'nav_menus' => array(
'link_home' => array(
'type' => 'custom',
'title' => _x( 'Home', 'Theme starter content' ),
'url' => home_url( '/' ),
),
'page_home' => array( // Deprecated in favor of 'link_home'.
'type' => 'post_type',
'object' => 'page',
'object_id' => '{{home}}',
),
'page_about' => array(
'type' => 'post_type',
'object' => 'page',
'object_id' => '{{about}}',
),
'page_blog' => array(
'type' => 'post_type',
'object' => 'page',
'object_id' => '{{blog}}',
),
'page_news' => array(
'type' => 'post_type',
'object' => 'page',
'object_id' => '{{news}}',
),
'page_contact' => array(
'type' => 'post_type',
'object' => 'page',
'object_id' => '{{contact}}',
),

'link_email' => array(
'title' => _x( 'Email', 'Theme starter content' ),
'url' => 'mailto:wordpress@example.com',
),
'link_facebook' => array(
'title' => _x( 'Facebook', 'Theme starter content' ),
'url' => 'https://www.facebook.com/wordpress',
),
'link_foursquare' => array(
'title' => _x( 'Foursquare', 'Theme starter content' ),
'url' => 'https://foursquare.com/',
),
'link_github' => array(
'title' => _x( 'GitHub', 'Theme starter content' ),
'url' => 'https://github.com/wordpress/',
),
'link_instagram' => array(
'title' => _x( 'Instagram', 'Theme starter content' ),
'url' => 'https://www.instagram.com/explore/tags/wordcamp/',
),
'link_linkedin' => array(
'title' => _x( 'LinkedIn', 'Theme starter content' ),
'url' => 'https://www.linkedin.com/company/1089783',
),
'link_pinterest' => array(
'title' => _x( 'Pinterest', 'Theme starter content' ),
'url' => 'https://www.pinterest.com/',
),
'link_twitter' => array(
'title' => _x( 'Twitter', 'Theme starter content' ),
'url' => 'https://twitter.com/wordpress',
),
'link_yelp' => array(
'title' => _x( 'Yelp', 'Theme starter content' ),
'url' => 'https://www.yelp.com',
),
'link_youtube' => array(
'title' => _x( 'YouTube', 'Theme starter content' ),
'url' => 'https://www.youtube.com/channel/UCdof4Ju7amm1chz1gi1T2ZA',
),
),
'posts' => array(
'home' => array(
'post_type' => 'page',
'post_title' => _x( 'Home', 'Theme starter content' ),
'post_content' => sprintf(
"<!-- wp:paragraph -->\n<p>%s</p>\n<!-- /wp:paragraph -->",
_x( 'Welcome to your site! This is your homepage, which is what most visitors will see when they come to your site for the first time.', 'Theme starter content' )
),
),
'about' => array(
'post_type' => 'page',
'post_title' => _x( 'About', 'Theme starter content' ),
'post_content' => sprintf(
"<!-- wp:paragraph -->\n<p>%s</p>\n<!-- /wp:paragraph -->",
_x( 'You might be an artist who would like to introduce yourself and your work here or maybe you are a business with a mission to describe.', 'Theme starter content' )
),
),
'contact' => array(
'post_type' => 'page',
'post_title' => _x( 'Contact', 'Theme starter content' ),
'post_content' => sprintf(
"<!-- wp:paragraph -->\n<p>%s</p>\n<!-- /wp:paragraph -->",
_x( 'This is a page with some basic contact information, such as an address and phone number. You might also try a plugin to add a contact form.', 'Theme starter content' )
),
),
'blog' => array(
'post_type' => 'page',
'post_title' => _x( 'Blog', 'Theme starter content' ),
),
'news' => array(
'post_type' => 'page',
'post_title' => _x( 'News', 'Theme starter content' ),
),

'homepage-section' => array(
'post_type' => 'page',
'post_title' => _x( 'A homepage section', 'Theme starter content' ),
'post_content' => sprintf(
"<!-- wp:paragraph -->\n<p>%s</p>\n<!-- /wp:paragraph -->",
_x( 'This is an example of a homepage section. Homepage sections can be any page other than the homepage itself, including the page that shows your latest blog posts.', 'Theme starter content' )
),
),
),
);

$content = array();

foreach ( $config as $type => $args ) {
switch ( $type ) {
// Use options and theme_mods as-is.
case 'options':
case 'theme_mods':
$content[ $type ] = $config[ $type ];
break;

// Widgets are grouped into sidebars.
case 'widgets':
foreach ( $config[ $type ] as $sidebar_id => $widgets ) {
foreach ( $widgets as $id => $widget ) {
if ( is_array( $widget ) ) {

// Item extends core content.
if ( ! empty( $core_content[ $type ][ $id ] ) ) {
$widget = array(
$core_content[ $type ][ $id ][0],
array_merge( $core_content[ $type ][ $id ][1], $widget ),
);
}

$content[ $type ][ $sidebar_id ][] = $widget;
} elseif ( is_string( $widget )
&& ! empty( $core_content[ $type ] )
&& ! empty( $core_content[ $type ][ $widget ] )
) {
$content[ $type ][ $sidebar_id ][] = $core_content[ $type ][ $widget ];
}
}
}
break;

// And nav menu items are grouped into nav menus.
case 'nav_menus':
foreach ( $config[ $type ] as $nav_menu_location => $nav_menu ) {

// Ensure nav menus get a name.
if ( empty( $nav_menu['name'] ) ) {
$nav_menu['name'] = $nav_menu_location;
}

$content[ $type ][ $nav_menu_location ]['name'] = $nav_menu['name'];

foreach ( $nav_menu['items'] as $id => $nav_menu_item ) {
if ( is_array( $nav_menu_item ) ) {

// Item extends core content.
if ( ! empty( $core_content[ $type ][ $id ] ) ) {
$nav_menu_item = array_merge( $core_content[ $type ][ $id ], $nav_menu_item );
}

$content[ $type ][ $nav_menu_location ]['items'][] = $nav_menu_item;
} elseif ( is_string( $nav_menu_item )
&& ! empty( $core_content[ $type ] )
&& ! empty( $core_content[ $type ][ $nav_menu_item ] )
) {
$content[ $type ][ $nav_menu_location ]['items'][] = $core_content[ $type ][ $nav_menu_item ];
}
}
}
break;

// Attachments are posts but have special treatment.
case 'attachments':
foreach ( $config[ $type ] as $id => $item ) {
if ( ! empty( $item['file'] ) ) {
$content[ $type ][ $id ] = $item;
}
}
break;

/*
* All that's left now are posts (besides attachments).
* Not a default case for the sake of clarity and future work.
*/
case 'posts':
foreach ( $config[ $type ] as $id => $item ) {
if ( is_array( $item ) ) {

// Item extends core content.
if ( ! empty( $core_content[ $type ][ $id ] ) ) {
$item = array_merge( $core_content[ $type ][ $id ], $item );
}

// Enforce a subset of fields.
$content[ $type ][ $id ] = wp_array_slice_assoc(
$item,
array(
'post_type',
'post_title',
'post_excerpt',
'post_name',
'post_content',
'menu_order',
'comment_status',
'thumbnail',
'template',
)
);
} elseif ( is_string( $item ) && ! empty( $core_content[ $type ][ $item ] ) ) {
$content[ $type ][ $item ] = $core_content[ $type ][ $item ];
}
}
break;
}
}

/**
* Filters the expanded array of starter content.
*
* @since 4.7.0
*
* @param array $content Array of starter content.
* @param array $config Array of theme-specific starter content configuration.
*/
return apply_filters( 'get_theme_starter_content', $content, $config );
}

/**
* Registers theme support for a given feature.
*
* Must be called in the theme's functions.php file to work.
* If attached to a hook, it must be {@see 'after_setup_theme'}.
* The {@see 'init'} hook may be too late for some features.
*
* Example usage:
*
* add_theme_support( 'title-tag' );
* add_theme_support( 'custom-logo', array(
* 'height' => 480,
* 'width' => 720,
* ) );
*
* @since 2.9.0
* @since 3.4.0 The `custom-header-uploads` feature was deprecated.
* @since 3.6.0 The `html5` feature was added.
* @since 3.6.1 The `html5` feature requires an array of types to be passed. Defaults to
* 'comment-list', 'comment-form', 'search-form' for backward compatibility.
* @since 3.9.0 The `html5` feature now also accepts 'gallery' and 'caption'.
* @since 4.1.0 The `title-tag` feature was added.
* @since 4.5.0 The `customize-selective-refresh-widgets` feature was added.
* @since 4.7.0 The `starter-content` feature was added.
* @since 5.0.0 The `responsive-embeds`, `align-wide`, `dark-editor-style`, `disable-custom-colors`,
* `disable-custom-font-sizes`, `editor-color-palette`, `editor-font-sizes`,
* `editor-styles`, and `wp-block-styles` features were added.
* @since 5.3.0 The `html5` feature now also accepts 'script' and 'style'.
* @since 5.3.0 Formalized the existing and already documented `...$args` parameter
* by adding it to the function signature.
* @since 5.4.0 The `disable-custom-gradients` feature limits to default gradients or gradients added
* through `editor-gradient-presets` theme support.
* @since 5.5.0 The `core-block-patterns` feature was added and is enabled by default.
* @since 5.5.0 The `custom-logo` feature now also accepts 'unlink-homepage-logo'.
* @since 5.6.0 The `post-formats` feature warns if no array is passed as the second parameter.
* @since 5.8.0 The `widgets-block-editor` feature enables the Widgets block editor.
* @since 5.8.0 The `block-templates` feature indicates whether a theme uses block-based templates.
* @since 6.0.0 The `html5` feature warns if no array is passed as the second parameter.
* @since 6.1.0 The `block-template-parts` feature allows to edit any reusable template part from site editor.
* @since 6.1.0 The `disable-layout-styles` feature disables the default layout styles.
* @since 6.3.0 The `link-color` feature allows to enable the link color setting.
* @since 6.3.0 The `border` feature allows themes without theme.json to add border styles to blocks.
* @since 6.5.0 The `appearance-tools` feature enables a few design tools for blocks,
* see `WP_Theme_JSON::APPEARANCE_TOOLS_OPT_INS` for a complete list.
* @since 6.6.0 The `editor-spacing-sizes` feature was added.
*
* @global array $_wp_theme_features
*
* @param string $feature The feature being added. Likely core values include:
* - 'admin-bar'
* - 'align-wide'
* - 'appearance-tools'
* - 'automatic-feed-links'
* - 'block-templates'
* - 'block-template-parts'
* - 'border'
* - 'core-block-patterns'
* - 'custom-background'
* - 'custom-header'
* - 'custom-line-height'
* - 'custom-logo'
* - 'customize-selective-refresh-widgets'
* - 'custom-spacing'
* - 'custom-units'
* - 'dark-editor-style'
* - 'disable-custom-colors'
* - 'disable-custom-font-sizes'
* - 'disable-custom-gradients'
* - 'disable-layout-styles'
* - 'editor-color-palette'
* - 'editor-gradient-presets'
* - 'editor-font-sizes'
* - 'editor-spacing-sizes'
* - 'editor-styles'
* - 'featured-content'
* - 'html5'
* - 'link-color'
* - 'menus'
* - 'post-formats'
* - 'post-thumbnails'
* - 'responsive-embeds'
* - 'starter-content'
* - 'title-tag'
* - 'widgets'
* - 'widgets-block-editor'
* - 'wp-block-styles'
* @param mixed ...$args Optional extra arguments to pass along with certain features.
* @return void|false Void on success, false on failure.
*/
function add_theme_support( $feature, ...$args ) {
global $_wp_theme_features;

if ( ! $args ) {
$args = true;
}

switch ( $feature ) {
case 'post-thumbnails':
// All post types are already supported.
if ( true === get_theme_support( 'post-thumbnails' ) ) {
return;
}

/*
* Merge post types with any that already declared their support
* for post thumbnails.
*/
if ( isset( $args[0] ) && is_array( $args[0] ) && isset( $_wp_theme_features['post-thumbnails'] ) ) {
$args[0] = array_unique( array_merge( $_wp_theme_features['post-thumbnails'][0], $args[0] ) );
}

break;

case 'post-formats':
if ( isset( $args[0] ) && is_array( $args[0] ) ) {
$post_formats = get_post_format_slugs();
unset( $post_formats['standard'] );

$args[0] = array_intersect( $args[0], array_keys( $post_formats ) );
} else {
_doing_it_wrong(
"add_theme_support( 'post-formats' )",
__( 'You need to pass an array of post formats.' ),
'5.6.0'
);
return false;
}
break;

case 'html5':
// You can't just pass 'html5', you need to pass an array of types.
if ( empty( $args[0] ) || ! is_array( $args[0] ) ) {
_doing_it_wrong(
"add_theme_support( 'html5' )",
__( 'You need to pass an array of types.' ),
'3.6.1'
);

if ( ! empty( $args[0] ) && ! is_array( $args[0] ) ) {
return false;
}

// Build an array of types for back-compat.
$args = array( 0 => array( 'comment-list', 'comment-form', 'search-form' ) );
}

// Calling 'html5' again merges, rather than overwrites.
if ( isset( $_wp_theme_features['html5'] ) ) {
$args[0] = array_merge( $_wp_theme_features['html5'][0], $args[0] );
}
break;

case 'custom-logo':
if ( true === $args ) {
$args = array( 0 => array() );
}
$defaults = array(
'width' => null,
'height' => null,
'flex-width' => false,
'flex-height' => false,
'header-text' => '',
'unlink-homepage-logo' => false,
);
$args[0] = wp_parse_args( array_intersect_key( $args[0], $defaults ), $defaults );

// Allow full flexibility if no size is specified.
if ( is_null( $args[0]['width'] ) && is_null( $args[0]['height'] ) ) {
$args[0]['flex-width'] = true;
$args[0]['flex-height'] = true;
}
break;

case 'custom-header-uploads':
return add_theme_support( 'custom-header', array( 'uploads' => true ) );

case 'custom-header':
if ( true === $args ) {
$args = array( 0 => array() );
}

$defaults = array(
'default-image' => '',
'random-default' => false,
'width' => 0,
'height' => 0,
'flex-height' => false,
'flex-width' => false,
'default-text-color' => '',
'header-text' => true,
'uploads' => true,
'wp-head-callback' => '',
'admin-head-callback' => '',
'admin-preview-callback' => '',
'video' => false,
'video-active-callback' => 'is_front_page',
);

$jit = isset( $args[0]['__jit'] );
unset( $args[0]['__jit'] );

/*
* Merge in data from previous add_theme_support() calls.
* The first value registered wins. (A child theme is set up first.)
*/
if ( isset( $_wp_theme_features['custom-header'] ) ) {
$args[0] = wp_parse_args( $_wp_theme_features['custom-header'][0], $args[0] );
}

/*
* Load in the defaults at the end, as we need to insure first one wins.
* This will cause all constants to be defined, as each arg will then be set to the default.
*/
if ( $jit ) {
$args[0] = wp_parse_args( $args[0], $defaults );
}

/*
* If a constant was defined, use that value. Otherwise, define the constant to ensure
* the constant is always accurate (and is not defined later, overriding our value).
* As stated above, the first value wins.
* Once we get to wp_loaded (just-in-time), define any constants we haven't already.
* Constants should be avoided. Don't reference them. This is just for backward compatibility.
*/

if ( defined( 'NO_HEADER_TEXT' ) ) {
$args[0]['header-text'] = ! NO_HEADER_TEXT;
} elseif ( isset( $args[0]['header-text'] ) ) {
define( 'NO_HEADER_TEXT', empty( $args[0]['header-text'] ) );
}

if ( defined( 'HEADER_IMAGE_WIDTH' ) ) {
$args[0]['width'] = (int) HEADER_IMAGE_WIDTH;
} elseif ( isset( $args[0]['width'] ) ) {
define( 'HEADER_IMAGE_WIDTH', (int) $args[0]['width'] );
}

if ( defined( 'HEADER_IMAGE_HEIGHT' ) ) {
$args[0]['height'] = (int) HEADER_IMAGE_HEIGHT;
} elseif ( isset( $args[0]['height'] ) ) {
define( 'HEADER_IMAGE_HEIGHT', (int) $args[0]['height'] );
}

if ( defined( 'HEADER_TEXTCOLOR' ) ) {
$args[0]['default-text-color'] = HEADER_TEXTCOLOR;
} elseif ( isset( $args[0]['default-text-color'] ) ) {
define( 'HEADER_TEXTCOLOR', $args[0]['default-text-color'] );
}

if ( defined( 'HEADER_IMAGE' ) ) {
$args[0]['default-image'] = HEADER_IMAGE;
} elseif ( isset( $args[0]['default-image'] ) ) {
define( 'HEADER_IMAGE', $args[0]['default-image'] );
}

if ( $jit && ! empty( $args[0]['default-image'] ) ) {
$args[0]['random-default'] = false;
}

/*
* If headers are supported, and we still don't have a defined width or height,
* we have implicit flex sizes.
*/
if ( $jit ) {
if ( empty( $args[0]['width'] ) && empty( $args[0]['flex-width'] ) ) {
$args[0]['flex-width'] = true;
}
if ( empty( $args[0]['height'] ) && empty( $args[0]['flex-height'] ) ) {
$args[0]['flex-height'] = true;
}
}

break;

case 'custom-background':
if ( true === $args ) {
$args = array( 0 => array() );
}

$defaults = array(
'default-image' => '',
'default-preset' => 'default',
'default-position-x' => 'left',
'default-position-y' => 'top',
'default-size' => 'auto',
'default-repeat' => 'repeat',
'default-attachment' => 'scroll',
'default-color' => '',
'wp-head-callback' => '_custom_background_cb',
'admin-head-callback' => '',
'admin-preview-callback' => '',
);

$jit = isset( $args[0]['__jit'] );
unset( $args[0]['__jit'] );

// Merge in data from previous add_theme_support() calls. The first value registered wins.
if ( isset( $_wp_theme_features['custom-background'] ) ) {
$args[0] = wp_parse_args( $_wp_theme_features['custom-background'][0], $args[0] );
}

if ( $jit ) {
$args[0] = wp_parse_args( $args[0], $defaults );
}

if ( defined( 'BACKGROUND_COLOR' ) ) {
$args[0]['default-color'] = BACKGROUND_COLOR;
} elseif ( isset( $args[0]['default-color'] ) || $jit ) {
define( 'BACKGROUND_COLOR', $args[0]['default-color'] );
}

if ( defined( 'BACKGROUND_IMAGE' ) ) {
$args[0]['default-image'] = BACKGROUND_IMAGE;
} elseif ( isset( $args[0]['default-image'] ) || $jit ) {
define( 'BACKGROUND_IMAGE', $args[0]['default-image'] );
}

break;

// Ensure that 'title-tag' is accessible in the admin.
case 'title-tag':
// Can be called in functions.php but must happen before wp_loaded, i.e. not in header.php.
if ( did_action( 'wp_loaded' ) ) {
_doing_it_wrong(
"add_theme_support( 'title-tag' )",
sprintf(
/* translators: 1: title-tag, 2: wp_loaded */
__( 'Theme support for %1$s should be registered before the %2$s hook.' ),
'<code>title-tag</code>',
'<code>wp_loaded</code>'
),
'4.1.0'
);

return false;
}
}

$_wp_theme_features[ $feature ] = $args;
}

/**
* Registers the internal custom header and background routines.
*
* @since 3.4.0
* @access private
*
* @global Custom_Image_Header $custom_image_header
* @global Custom_Background $custom_background
*/
function _custom_header_background_just_in_time() {
global $custom_image_header, $custom_background;

if ( current_theme_supports( 'custom-header' ) ) {
// In case any constants were defined after an add_custom_image_header() call, re-run.
add_theme_support( 'custom-header', array( '__jit' => true ) );

$args = get_theme_support( 'custom-header' );
if ( $args[0]['wp-head-callback'] ) {
add_action( 'wp_head', $args[0]['wp-head-callback'] );
}

if ( is_admin() ) {
require_once ABSPATH . 'wp-admin/includes/class-custom-image-header.php';
$custom_image_header = new Custom_Image_Header( $args[0]['admin-head-callback'], $args[0]['admin-preview-callback'] );
}
}

if ( current_theme_supports( 'custom-background' ) ) {
// In case any constants were defined after an add_custom_background() call, re-run.
add_theme_support( 'custom-background', array( '__jit' => true ) );

$args = get_theme_support( 'custom-background' );
add_action( 'wp_head', $args[0]['wp-head-callback'] );

if ( is_admin() ) {
require_once ABSPATH . 'wp-admin/includes/class-custom-background.php';
$custom_background = new Custom_Background( $args[0]['admin-head-callback'], $args[0]['admin-preview-callback'] );
}
}
}

/**
* Adds CSS to hide header text for custom logo, based on Customizer setting.
*
* @since 4.5.0
* @access private
*/
function _custom_logo_header_styles() {
if ( ! current_theme_supports( 'custom-header', 'header-text' )
&& get_theme_support( 'custom-logo', 'header-text' )
&& ! get_theme_mod( 'header_text', true )
) {
$classes = (array) get_theme_support( 'custom-logo', 'header-text' );
$classes = array_map( 'sanitize_html_class', $classes );
$classes = '.' . implode( ', .', $classes );

$type_attr = current_theme_supports( 'html5', 'style' ) ? '' : ' type="text/css"';
?>
<!-- Custom Logo: hide header text -->
<style id="custom-logo-css"<?php echo $type_attr; ?>>
<?php echo $classes; ?> {
position: absolute;
clip: rect(1px, 1px, 1px, 1px);
}
</style>
<?php
}
}

/**
* Gets the theme support arguments passed when registering that support.
*
* Example usage:
*
* get_theme_support( 'custom-logo' );
* get_theme_support( 'custom-header', 'width' );
*
* @since 3.1.0
* @since 5.3.0 Formalized the existing and already documented `...$args` parameter
* by adding it to the function signature.
*
* @global array $_wp_theme_features
*
* @param string $feature The feature to check. See add_theme_support() for the list
* of possible values.
* @param mixed ...$args Optional extra arguments to be checked against certain features.
* @return mixed The array of extra arguments or the value for the registered feature.
*/
function get_theme_support( $feature, ...$args ) {
global $_wp_theme_features;

if ( ! isset( $_wp_theme_features[ $feature ] ) ) {
return false;
}

if ( ! $args ) {
return $_wp_theme_features[ $feature ];
}

switch ( $feature ) {
case 'custom-logo':
case 'custom-header':
case 'custom-background':
if ( isset( $_wp_theme_features[ $feature ][0][ $args[0] ] ) ) {
return $_wp_theme_features[ $feature ][0][ $args[0] ];
}
return false;

default:
return $_wp_theme_features[ $feature ];
}
}

/**
* Allows a theme to de-register its support of a certain feature
*
* Should be called in the theme's functions.php file. Generally would
* be used for child themes to override support from the parent theme.
*
* @since 3.0.0
*
* @see add_theme_support()
*
* @param string $feature The feature being removed. See add_theme_support() for the list
* of possible values.
* @return bool|void Whether feature was removed.
*/
function remove_theme_support( $feature ) {
// Do not remove internal registrations that are not used directly by themes.
if ( in_array( $feature, array( 'editor-style', 'widgets', 'menus' ), true ) ) {
return false;
}

return _remove_theme_support( $feature );
}

/**
* Do not use. Removes theme support internally without knowledge of those not used
* by themes directly.
*
* @access private
* @since 3.1.0
* @global array $_wp_theme_features
* @global Custom_Image_Header $custom_image_header
* @global Custom_Background $custom_background
*
* @param string $feature The feature being removed. See add_theme_support() for the list
* of possible values.
* @return bool True if support was removed, false if the feature was not registered.
*/
function _remove_theme_support( $feature ) {
global $_wp_theme_features;

switch ( $feature ) {
case 'custom-header-uploads':
if ( ! isset( $_wp_theme_features['custom-header'] ) ) {
return false;
}
add_theme_support( 'custom-header', array( 'uploads' => false ) );
return; // Do not continue - custom-header-uploads no longer exists.
}

if ( ! isset( $_wp_theme_features[ $feature ] ) ) {
return false;
}

switch ( $feature ) {
case 'custom-header':
if ( ! did_action( 'wp_loaded' ) ) {
break;
}
$support = get_theme_support( 'custom-header' );
if ( isset( $support[0]['wp-head-callback'] ) ) {
remove_action( 'wp_head', $support[0]['wp-head-callback'] );
}
if ( isset( $GLOBALS['custom_image_header'] ) ) {
remove_action( 'admin_menu', array( $GLOBALS['custom_image_header'], 'init' ) );
unset( $GLOBALS['custom_image_header'] );
}
break;

case 'custom-background':
if ( ! did_action( 'wp_loaded' ) ) {
break;
}
$support = get_theme_support( 'custom-background' );
if ( isset( $support[0]['wp-head-callback'] ) ) {
remove_action( 'wp_head', $support[0]['wp-head-callback'] );
}
remove_action( 'admin_menu', array( $GLOBALS['custom_background'], 'init' ) );
unset( $GLOBALS['custom_background'] );
break;
}

unset( $_wp_theme_features[ $feature ] );

return true;
}

/**
* Checks a theme's support for a given feature.
*
* Example usage:
*
* current_theme_supports( 'custom-logo' );
* current_theme_supports( 'html5', 'comment-form' );
*
* @since 2.9.0
* @since 5.3.0 Formalized the existing and already documented `...$args` parameter
* by adding it to the function signature.
*
* @global array $_wp_theme_features
*
* @param string $feature The feature being checked. See add_theme_support() for the list
* of possible values.
* @param mixed ...$args Optional extra arguments to be checked against certain features.
* @return bool True if the active theme supports the feature, false otherwise.
*/
function current_theme_supports( $feature, ...$args ) {
global $_wp_theme_features;

if ( 'custom-header-uploads' === $feature ) {
return current_theme_supports( 'custom-header', 'uploads' );
}

if ( ! isset( $_wp_theme_features[ $feature ] ) ) {
return false;
}

// If no args passed then no extra checks need to be performed.
if ( ! $args ) {
/** This filter is documented in wp-includes/theme.php */
return apply_filters( "current_theme_supports-{$feature}", true, $args, $_wp_theme_features[ $feature ] ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores
}

switch ( $feature ) {
case 'post-thumbnails':
/*
* post-thumbnails can be registered for only certain content/post types
* by passing an array of types to add_theme_support().
* If no array was passed, then any type is accepted.
*/
if ( true === $_wp_theme_features[ $feature ] ) { // Registered for all types.
return true;
}
$content_type = $args[0];
return in_array( $content_type, $_wp_theme_features[ $feature ][0], true );

case 'html5':
case 'post-formats':
/*
* Specific post formats can be registered by passing an array of types
* to add_theme_support().
*
* Specific areas of HTML5 support *must* be passed via an array to add_theme_support().
*/
$type = $args[0];
return in_array( $type, $_wp_theme_features[ $feature ][0], true );

case 'custom-logo':
case 'custom-header':
case 'custom-background':
// Specific capabilities can be registered by passing an array to add_theme_support().
return ( isset( $_wp_theme_features[ $feature ][0][ $args[0] ] ) && $_wp_theme_features[ $feature ][0][ $args[0] ] );
}

/**
* Filters whether the active theme supports a specific feature.
*
* The dynamic portion of the hook name, `$feature`, refers to the specific
* theme feature. See add_theme_support() for the list of possible values.
*
* @since 3.4.0
*
* @param bool $supports Whether the active theme supports the given feature. Default true.
* @param array $args Array of arguments for the feature.
* @param string $feature The theme feature.
*/
return apply_filters( "current_theme_supports-{$feature}", true, $args, $_wp_theme_features[ $feature ] ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores
}

/**
* Checks a theme's support for a given feature before loading the functions which implement it.
*
* @since 2.9.0
*
* @param string $feature The feature being checked. See add_theme_support() for the list
* of possible values.
* @param string $file Path to the file.
* @return bool True if the active theme supports the supplied feature, false otherwise.
*/
function require_if_theme_supports( $feature, $file ) {
if ( current_theme_supports( $feature ) ) {
require $file;
return true;
}
return false;
}

/**
* Registers a theme feature for use in add_theme_support().
*
* This does not indicate that the active theme supports the feature, it only describes
* the feature's supported options.
*
* @since 5.5.0
*
* @see add_theme_support()
*
* @global array $_wp_registered_theme_features
*
* @param string $feature The name uniquely identifying the feature. See add_theme_support()
* for the list of possible values.
* @param array $args {
* Data used to describe the theme.
*
* @type string $type The type of data associated with this feature.
* Valid values are 'string', 'boolean', 'integer',
* 'number', 'array', and 'object'. Defaults to 'boolean'.
* @type bool $variadic Does this feature utilize the variadic support
* of add_theme_support(), or are all arguments specified
* as the second parameter. Must be used with the "array" type.
* @type string $description A short description of the feature. Included in
* the Themes REST API schema. Intended for developers.
* @type bool|array $show_in_rest {
* Whether this feature should be included in the Themes REST API endpoint.
* Defaults to not being included. When registering an 'array' or 'object' type,
* this argument must be an array with the 'schema' key.
*
* @type array $schema Specifies the JSON Schema definition describing
* the feature. If any objects in the schema do not include
* the 'additionalProperties' keyword, it is set to false.
* @type string $name An alternate name to be used as the property name
* in the REST API.
* @type callable $prepare_callback A function used to format the theme support in the REST API.
* Receives the raw theme support value.
* }
* }
* @return true|WP_Error True if the theme feature was successfully registered, a WP_Error object if not.
*/
function register_theme_feature( $feature, $args = array() ) {
global $_wp_registered_theme_features;

if ( ! is_array( $_wp_registered_theme_features ) ) {
$_wp_registered_theme_features = array();
}

$defaults = array(
'type' => 'boolean',
'variadic' => false,
'description' => '',
'show_in_rest' => false,
);

$args = wp_parse_args( $args, $defaults );

if ( true === $args['show_in_rest'] ) {
$args['show_in_rest'] = array();
}

if ( is_array( $args['show_in_rest'] ) ) {
$args['show_in_rest'] = wp_parse_args(
$args['show_in_rest'],
array(
'schema' => array(),
'name' => $feature,
'prepare_callback' => null,
)
);
}

if ( ! in_array( $args['type'], array( 'string', 'boolean', 'integer', 'number', 'array', 'object' ), true ) ) {
return new WP_Error(
'invalid_type',
__( 'The feature "type" is not valid JSON Schema type.' )
);
}

if ( true === $args['variadic'] && 'array' !== $args['type'] ) {
return new WP_Error(
'variadic_must_be_array',
__( 'When registering a "variadic" theme feature, the "type" must be an "array".' )
);
}

if ( false !== $args['show_in_rest'] && in_array( $args['type'], array( 'array', 'object' ), true ) ) {
if ( ! is_array( $args['show_in_rest'] ) || empty( $args['show_in_rest']['schema'] ) ) {
return new WP_Error(
'missing_schema',
__( 'When registering an "array" or "object" feature to show in the REST API, the feature\'s schema must also be defined.' )
);
}

if ( 'array' === $args['type'] && ! isset( $args['show_in_rest']['schema']['items'] ) ) {
return new WP_Error(
'missing_schema_items',
__( 'When registering an "array" feature, the feature\'s schema must include the "items" keyword.' )
);
}

if ( 'object' === $args['type'] && ! isset( $args['show_in_rest']['schema']['properties'] ) ) {
return new WP_Error(
'missing_schema_properties',
__( 'When registering an "object" feature, the feature\'s schema must include the "properties" keyword.' )
);
}
}

if ( is_array( $args['show_in_rest'] ) ) {
if ( isset( $args['show_in_rest']['prepare_callback'] )
&& ! is_callable( $args['show_in_rest']['prepare_callback'] )
) {
return new WP_Error(
'invalid_rest_prepare_callback',
sprintf(
/* translators: %s: prepare_callback */
__( 'The "%s" must be a callable function.' ),
'prepare_callback'
)
);
}

$args['show_in_rest']['schema'] = wp_parse_args(
$args['show_in_rest']['schema'],
array(
'description' => $args['description'],
'type' => $args['type'],
'default' => false,
)
);

if ( is_bool( $args['show_in_rest']['schema']['default'] )
&& ! in_array( 'boolean', (array) $args['show_in_rest']['schema']['type'], true )
) {
// Automatically include the "boolean" type when the default value is a boolean.
$args['show_in_rest']['schema']['type'] = (array) $args['show_in_rest']['schema']['type'];
array_unshift( $args['show_in_rest']['schema']['type'], 'boolean' );
}

$args['show_in_rest']['schema'] = rest_default_additional_properties_to_false( $args['show_in_rest']['schema'] );
}

$_wp_registered_theme_features[ $feature ] = $args;

return true;
}

/**
* Gets the list of registered theme features.
*
* @since 5.5.0
*
* @global array $_wp_registered_theme_features
*
* @return array[] List of theme features, keyed by their name.
*/
function get_registered_theme_features() {
global $_wp_registered_theme_features;

if ( ! is_array( $_wp_registered_theme_features ) ) {
return array();
}

return $_wp_registered_theme_features;
}

/**
* Gets the registration config for a theme feature.
*
* @since 5.5.0
*
* @global array $_wp_registered_theme_features
*
* @param string $feature The feature name. See add_theme_support() for the list
* of possible values.
* @return array|null The registration args, or null if the feature was not registered.
*/
function get_registered_theme_feature( $feature ) {
global $_wp_registered_theme_features;

if ( ! is_array( $_wp_registered_theme_features ) ) {
return null;
}

return isset( $_wp_registered_theme_features[ $feature ] ) ? $_wp_registered_theme_features[ $feature ] : null;
}

/**
* Checks an attachment being deleted to see if it's a header or background image.
*
* If true it removes the theme modification which would be pointing at the deleted
* attachment.
*
* @access private
* @since 3.0.0
* @since 4.3.0 Also removes `header_image_data`.
* @since 4.5.0 Also removes custom logo theme mods.
* @since 6.6.0 Also removes `site_logo` option set by the site logo block.
*
* @param int $id The attachment ID.
*/
function _delete_attachment_theme_mod( $id ) {
$attachment_image = wp_get_attachment_url( $id );
$header_image = get_header_image();
$background_image = get_background_image();
$custom_logo_id = (int) get_theme_mod( 'custom_logo' );
$site_logo_id = (int) get_option( 'site_logo' );

if ( $custom_logo_id && $custom_logo_id === $id ) {
remove_theme_mod( 'custom_logo' );
remove_theme_mod( 'header_text' );
}

if ( $site_logo_id && $site_logo_id === $id ) {
delete_option( 'site_logo' );
}

if ( $header_image && $header_image === $attachment_image ) {
remove_theme_mod( 'header_image' );
remove_theme_mod( 'header_image_data' );
}

if ( $background_image && $background_image === $attachment_image ) {
remove_theme_mod( 'background_image' );
}
}

/**
* Checks if a theme has been changed and runs 'after_switch_theme' hook on the next WP load.
*
* See {@see 'after_switch_theme'}.
*
* @since 3.3.0
*/
function check_theme_switched() {
$stylesheet = get_option( 'theme_switched' );

if ( $stylesheet ) {
$old_theme = wp_get_theme( $stylesheet );

// Prevent widget & menu mapping from running since Customizer already called it up front.
if ( get_option( 'theme_switched_via_customizer' ) ) {
remove_action( 'after_switch_theme', '_wp_menus_changed' );
remove_action( 'after_switch_theme', '_wp_sidebars_changed' );
update_option( 'theme_switched_via_customizer', false );
}

if ( $old_theme->exists() ) {
/**
* Fires on the next WP load after the theme has been switched.
*
* The parameters differ according to whether the old theme exists or not.
* If the old theme is missing, the old name will instead be the slug
* of the old theme.
*
* See {@see 'switch_theme'}.
*
* @since 3.3.0
*
* @param string $old_name Old theme name.
* @param WP_Theme $old_theme WP_Theme instance of the old theme.
*/
do_action( 'after_switch_theme', $old_theme->get( 'Name' ), $old_theme );
} else {
/** This action is documented in wp-includes/theme.php */
do_action( 'after_switch_theme', $stylesheet, $old_theme );
}

flush_rewrite_rules();

update_option( 'theme_switched', false );
}
}

/**
* Includes and instantiates the WP_Customize_Manager class.
*
* Loads the Customizer at plugins_loaded when accessing the customize.php admin
* page or when any request includes a wp_customize=on param or a customize_changeset
* param (a UUID). This param is a signal for whether to bootstrap the Customizer when
* WordPress is loading, especially in the Customizer preview
* or when making Customizer Ajax requests for widgets or menus.
*
* @since 3.4.0
*
* @global WP_Customize_Manager $wp_customize
*/
function _wp_customize_include() {

$is_customize_admin_page = ( is_admin() && 'customize.php' === basename( $_SERVER['PHP_SELF'] ) );
$should_include = (
$is_customize_admin_page
||
( isset( $_REQUEST['wp_customize'] ) && 'on' === $_REQUEST['wp_customize'] )
||
( ! empty( $_GET['customize_changeset_uuid'] ) || ! empty( $_POST['customize_changeset_uuid'] ) )
);

if ( ! $should_include ) {
return;
}

/*
* Note that wp_unslash() is not being used on the input vars because it is
* called before wp_magic_quotes() gets called. Besides this fact, none of
* the values should contain any characters needing slashes anyway.
*/
$keys = array(
'changeset_uuid',
'customize_changeset_uuid',
'customize_theme',
'theme',
'customize_messenger_channel',
'customize_autosaved',
);
$input_vars = array_merge(
wp_array_slice_assoc( $_GET, $keys ),
wp_array_slice_assoc( $_POST, $keys )
);

$theme = null;
$autosaved = null;
$messenger_channel = null;

/*
* Value false indicates UUID should be determined after_setup_theme
* to either re-use existing saved changeset or else generate a new UUID if none exists.
*/
$changeset_uuid = false;

/*
* Set initially to false since defaults to true for back-compat;
* can be overridden via the customize_changeset_branching filter.
*/
$branching = false;

if ( $is_customize_admin_page && isset( $input_vars['changeset_uuid'] ) ) {
$changeset_uuid = sanitize_key( $input_vars['changeset_uuid'] );
} elseif ( ! empty( $input_vars['customize_changeset_uuid'] ) ) {
$changeset_uuid = sanitize_key( $input_vars['customize_changeset_uuid'] );
}

// Note that theme will be sanitized via WP_Theme.
if ( $is_customize_admin_page && isset( $input_vars['theme'] ) ) {
$theme = $input_vars['theme'];
} elseif ( isset( $input_vars['customize_theme'] ) ) {
$theme = $input_vars['customize_theme'];
}

if ( ! empty( $input_vars['customize_autosaved'] ) ) {
$autosaved = true;
}

if ( isset( $input_vars['customize_messenger_channel'] ) ) {
$messenger_channel = sanitize_key( $input_vars['customize_messenger_channel'] );
}

/*
* Note that settings must be previewed even outside the customizer preview
* and also in the customizer pane itself. This is to enable loading an existing
* changeset into the customizer. Previewing the settings only has to be prevented
* here in the case of a customize_save action because this will cause WP to think
* there is nothing changed that needs to be saved.
*/
$is_customize_save_action = (
wp_doing_ajax()
&&
isset( $_REQUEST['action'] )
&&
'customize_save' === wp_unslash( $_REQUEST['action'] )
);
$settings_previewed = ! $is_customize_save_action;

require_once ABSPATH . WPINC . '/class-wp-customize-manager.php';
$GLOBALS['wp_customize'] = new WP_Customize_Manager(
compact(
'changeset_uuid',
'theme',
'messenger_channel',
'settings_previewed',
'autosaved',
'branching'
)
);
}

/**
* Publishes a snapshot's changes.
*
* @since 4.7.0
* @access private
*
* @global WP_Customize_Manager $wp_customize Customizer instance.
*
* @param string $new_status New post status.
* @param string $old_status Old post status.
* @param WP_Post $changeset_post Changeset post object.
*/
function _wp_customize_publish_changeset( $new_status, $old_status, $changeset_post ) {
global $wp_customize;

$is_publishing_changeset = (
'customize_changeset' === $changeset_post->post_type
&&
'publish' === $new_status
&&
'publish' !== $old_status
);
if ( ! $is_publishing_changeset ) {
return;
}

if ( empty( $wp_customize ) ) {
require_once ABSPATH . WPINC . '/class-wp-customize-manager.php';
$wp_customize = new WP_Customize_Manager(
array(
'changeset_uuid' => $changeset_post->post_name,
'settings_previewed' => false,
)
);
}

if ( ! did_action( 'customize_register' ) ) {
/*
* When running from CLI or Cron, the customize_register action will need
* to be triggered in order for core, themes, and plugins to register their
* settings. Normally core will add_action( 'customize_register' ) at
* priority 10 to register the core settings, and if any themes/plugins
* also add_action( 'customize_register' ) at the same priority, they
* will have a $wp_customize with those settings registered since they
* call add_action() afterward, normally. However, when manually doing
* the customize_register action after the setup_theme, then the order
* will be reversed for two actions added at priority 10, resulting in
* the core settings no longer being available as expected to themes/plugins.
* So the following manually calls the method that registers the core
* settings up front before doing the action.
*/
remove_action( 'customize_register', array( $wp_customize, 'register_controls' ) );
$wp_customize->register_controls();

/** This filter is documented in wp-includes/class-wp-customize-manager.php */
do_action( 'customize_register', $wp_customize );
}
$wp_customize->_publish_changeset_values( $changeset_post->ID );

/*
* Trash the changeset post if revisions are not enabled. Unpublished
* changesets by default get garbage collected due to the auto-draft status.
* When a changeset post is published, however, it would no longer get cleaned
* out. This is a problem when the changeset posts are never displayed anywhere,
* since they would just be endlessly piling up. So here we use the revisions
* feature to indicate whether or not a published changeset should get trashed
* and thus garbage collected.
*/
if ( ! wp_revisions_enabled( $changeset_post ) ) {
$wp_customize->trash_changeset_post( $changeset_post->ID );
}
}

/**
* Filters changeset post data upon insert to ensure post_name is intact.
*
* This is needed to prevent the post_name from being dropped when the post is
* transitioned into pending status by a contributor.
*
* @since 4.7.0
*
* @see wp_insert_post()
*
* @param array $post_data An array of slashed post data.
* @param array $supplied_post_data An array of sanitized, but otherwise unmodified post data.
* @return array Filtered data.
*/
function _wp_customize_changeset_filter_insert_post_data( $post_data, $supplied_post_data ) {
if ( isset( $post_data['post_type'] ) && 'customize_changeset' === $post_data['post_type'] ) {

// Prevent post_name from being dropped, such as when contributor saves a changeset post as pending.
if ( empty( $post_data['post_name'] ) && ! empty( $supplied_post_data['post_name'] ) ) {
$post_data['post_name'] = $supplied_post_data['post_name'];
}
}
return $post_data;
}

/**
* Adds settings for the customize-loader script.
*
* @since 3.4.0
*/
function _wp_customize_loader_settings() {
$admin_origin = parse_url( admin_url() );
$home_origin = parse_url( home_url() );
$cross_domain = ( strtolower( $admin_origin['host'] ) !== strtolower( $home_origin['host'] ) );

$browser = array(
'mobile' => wp_is_mobile(),
'ios' => wp_is_mobile() && preg_match( '/iPad|iPod|iPhone/', $_SERVER['HTTP_USER_AGENT'] ),
);

$settings = array(
'url' => esc_url( admin_url( 'customize.php' ) ),
'isCrossDomain' => $cross_domain,
'browser' => $browser,
'l10n' => array(
'saveAlert' => __( 'The changes you made will be lost if you navigate away from this page.' ),
'mainIframeTitle' => __( 'Customizer' ),
),
);

$script = 'var _wpCustomizeLoaderSettings = ' . wp_json_encode( $settings ) . ';';

$wp_scripts = wp_scripts();
$data = $wp_scripts->get_data( 'customize-loader', 'data' );
if ( $data ) {
$script = "$data\n$script";
}

$wp_scripts->add_data( 'customize-loader', 'data', $script );
}

/**
* Returns a URL to load the Customizer.
*
* @since 3.4.0
*
* @param string $stylesheet Optional. Theme to customize. Defaults to active theme.
* The theme's stylesheet will be urlencoded if necessary.
* @return string
*/
function wp_customize_url( $stylesheet = '' ) {
$url = admin_url( 'customize.php' );
if ( $stylesheet ) {
$url .= '?theme=' . urlencode( $stylesheet );
}
return esc_url( $url );
}

/**
* Prints a script to check whether or not the Customizer is supported,
* and apply either the no-customize-support or customize-support class
* to the body.
*
* This function MUST be called inside the body tag.
*
* Ideally, call this function immediately after the body tag is opened.
* This prevents a flash of unstyled content.
*
* It is also recommended that you add the "no-customize-support" class
* to the body tag by default.
*
* @since 3.4.0
* @since 4.7.0 Support for IE8 and below is explicitly removed via conditional comments.
* @since 5.5.0 IE8 and older are no longer supported.
*/
function wp_customize_support_script() {
$admin_origin = parse_url( admin_url() );
$home_origin = parse_url( home_url() );
$cross_domain = ( strtolower( $admin_origin['host'] ) !== strtolower( $home_origin['host'] ) );
ob_start();
?>
<script>
(function() {
var request, b = document.body, c = 'className', cs = 'customize-support', rcs = new RegExp('(^|\\s+)(no-)?'+cs+'(\\s+|$)');

<?php if ( $cross_domain ) : ?>
request = (function(){ var xhr = new XMLHttpRequest(); return ('withCredentials' in xhr); })();
<?php else : ?>
request = true;
<?php endif; ?>

b[c] = b[c].replace( rcs, ' ' );
// The customizer requires postMessage and CORS (if the site is cross domain).
b[c] += ( window.postMessage && request ? ' ' : ' no-' ) + cs;
}());
</script>
<?php
wp_print_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_get_clean() ) );
}

/**
* Whether the site is being previewed in the Customizer.
*
* @since 4.0.0
*
* @global WP_Customize_Manager $wp_customize Customizer instance.
*
* @return bool True if the site is being previewed in the Customizer, false otherwise.
*/
function is_customize_preview() {
global $wp_customize;

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

/**
* Makes sure that auto-draft posts get their post_date bumped or status changed
* to draft to prevent premature garbage-collection.
*
* When a changeset is updated but remains an auto-draft, ensure the post_date
* for the auto-draft posts remains the same so that it will be
* garbage-collected at the same time by `wp_delete_auto_drafts()`. Otherwise,
* if the changeset is updated to be a draft then update the posts
* to have a far-future post_date so that they will never be garbage collected
* unless the changeset post itself is deleted.
*
* When a changeset is updated to be a persistent draft or to be scheduled for
* publishing, then transition any dependent auto-drafts to a draft status so
* that they likewise will not be garbage-collected but also so that they can
* be edited in the admin before publishing since there is not yet a post/page
* editing flow in the Customizer. See #39752.
*
* @link https://core.trac.wordpress.org/ticket/39752
*
* @since 4.8.0
* @access private
* @see wp_delete_auto_drafts()
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $new_status Transition to this post status.
* @param string $old_status Previous post status.
* @param \WP_Post $post Post data.
*/
function _wp_keep_alive_customize_changeset_dependent_auto_drafts( $new_status, $old_status, $post ) {
global $wpdb;
unset( $old_status );

// Short-circuit if not a changeset or if the changeset was published.
if ( 'customize_changeset' !== $post->post_type || 'publish' === $new_status ) {
return;
}

$data = json_decode( $post->post_content, true );
if ( empty( $data['nav_menus_created_posts']['value'] ) ) {
return;
}

/*
* Actually, in lieu of keeping alive, trash any customization drafts here if the changeset itself is
* getting trashed. This is needed because when a changeset transitions to a draft, then any of the
* dependent auto-draft post/page stubs will also get transitioned to customization drafts which
* are then visible in the WP Admin. We cannot wait for the deletion of the changeset in which
* _wp_delete_customize_changeset_dependent_auto_drafts() will be called, since they need to be
* trashed to remove from visibility immediately.
*/
if ( 'trash' === $new_status ) {
foreach ( $data['nav_menus_created_posts']['value'] as $post_id ) {
if ( ! empty( $post_id ) && 'draft' === get_post_status( $post_id ) ) {
wp_trash_post( $post_id );
}
}
return;
}

$post_args = array();
if ( 'auto-draft' === $new_status ) {
/*
* Keep the post date for the post matching the changeset
* so that it will not be garbage-collected before the changeset.
*/
$post_args['post_date'] = $post->post_date; // Note wp_delete_auto_drafts() only looks at this date.
} else {
/*
* Since the changeset no longer has an auto-draft (and it is not published)
* it is now a persistent changeset, a long-lived draft, and so any
* associated auto-draft posts should likewise transition into having a draft
* status. These drafts will be treated differently than regular drafts in
* that they will be tied to the given changeset. The publish meta box is
* replaced with a notice about how the post is part of a set of customized changes
* which will be published when the changeset is published.
*/
$post_args['post_status'] = 'draft';
}

foreach ( $data['nav_menus_created_posts']['value'] as $post_id ) {
if ( empty( $post_id ) || 'auto-draft' !== get_post_status( $post_id ) ) {
continue;
}
$wpdb->update(
$wpdb->posts,
$post_args,
array( 'ID' => $post_id )
);
clean_post_cache( $post_id );
}
}

/**
* Creates the initial theme features when the 'setup_theme' action is fired.
*
* See {@see 'setup_theme'}.
*
* @since 5.5.0
* @since 6.0.1 The `block-templates` feature was added.
*/
function create_initial_theme_features() {
register_theme_feature(
'align-wide',
array(
'description' => __( 'Whether theme opts in to wide alignment CSS class.' ),
'show_in_rest' => true,
)
);
register_theme_feature(
'automatic-feed-links',
array(
'description' => __( 'Whether posts and comments RSS feed links are added to head.' ),
'show_in_rest' => true,
)
);
register_theme_feature(
'block-templates',
array(
'description' => __( 'Whether a theme uses block-based templates.' ),
'show_in_rest' => true,
)
);
register_theme_feature(
'block-template-parts',
array(
'description' => __( 'Whether a theme uses block-based template parts.' ),
'show_in_rest' => true,
)
);
register_theme_feature(
'custom-background',
array(
'description' => __( 'Custom background if defined by the theme.' ),
'type' => 'object',
'show_in_rest' => array(
'schema' => array(
'properties' => array(
'default-image' => array(
'type' => 'string',
'format' => 'uri',
),
'default-preset' => array(
'type' => 'string',
'enum' => array(
'default',
'fill',
'fit',
'repeat',
'custom',
),
),
'default-position-x' => array(
'type' => 'string',
'enum' => array(
'left',
'center',
'right',
),
),
'default-position-y' => array(
'type' => 'string',
'enum' => array(
'left',
'center',
'right',
),
),
'default-size' => array(
'type' => 'string',
'enum' => array(
'auto',
'contain',
'cover',
),
),
'default-repeat' => array(
'type' => 'string',
'enum' => array(
'repeat-x',
'repeat-y',
'repeat',
'no-repeat',
),
),
'default-attachment' => array(
'type' => 'string',
'enum' => array(
'scroll',
'fixed',
),
),
'default-color' => array(
'type' => 'string',
),
),
),
),
)
);
register_theme_feature(
'custom-header',
array(
'description' => __( 'Custom header if defined by the theme.' ),
'type' => 'object',
'show_in_rest' => array(
'schema' => array(
'properties' => array(
'default-image' => array(
'type' => 'string',
'format' => 'uri',
),
'random-default' => array(
'type' => 'boolean',
),
'width' => array(
'type' => 'integer',
),
'height' => array(
'type' => 'integer',
),
'flex-height' => array(
'type' => 'boolean',
),
'flex-width' => array(
'type' => 'boolean',
),
'default-text-color' => array(
'type' => 'string',
),
'header-text' => array(
'type' => 'boolean',
),
'uploads' => array(
'type' => 'boolean',
),
'video' => array(
'type' => 'boolean',
),
),
),
),
)
);
register_theme_feature(
'custom-logo',
array(
'type' => 'object',
'description' => __( 'Custom logo if defined by the theme.' ),
'show_in_rest' => array(
'schema' => array(
'properties' => array(
'width' => array(
'type' => 'integer',
),
'height' => array(
'type' => 'integer',
),
'flex-width' => array(
'type' => 'boolean',
),
'flex-height' => array(
'type' => 'boolean',
),
'header-text' => array(
'type' => 'array',
'items' => array(
'type' => 'string',
),
),
'unlink-homepage-logo' => array(
'type' => 'boolean',
),
),
),
),
)
);
register_theme_feature(
'customize-selective-refresh-widgets',
array(
'description' => __( 'Whether the theme enables Selective Refresh for Widgets being managed with the Customizer.' ),
'show_in_rest' => true,
)
);
register_theme_feature(
'dark-editor-style',
array(
'description' => __( 'Whether theme opts in to the dark editor style UI.' ),
'show_in_rest' => true,
)
);
register_theme_feature(
'disable-custom-colors',
array(
'description' => __( 'Whether the theme disables custom colors.' ),
'show_in_rest' => true,
)
);
register_theme_feature(
'disable-custom-font-sizes',
array(
'description' => __( 'Whether the theme disables custom font sizes.' ),
'show_in_rest' => true,
)
);
register_theme_feature(
'disable-custom-gradients',
array(
'description' => __( 'Whether the theme disables custom gradients.' ),
'show_in_rest' => true,
)
);
register_theme_feature(
'disable-layout-styles',
array(
'description' => __( 'Whether the theme disables generated layout styles.' ),
'show_in_rest' => true,
)
);
register_theme_feature(
'editor-color-palette',
array(
'type' => 'array',
'description' => __( 'Custom color palette if defined by the theme.' ),
'show_in_rest' => array(
'schema' => array(
'items' => array(
'type' => 'object',
'properties' => array(
'name' => array(
'type' => 'string',
),
'slug' => array(
'type' => 'string',
),
'color' => array(
'type' => 'string',
),
),
),
),
),
)
);
register_theme_feature(
'editor-font-sizes',
array(
'type' => 'array',
'description' => __( 'Custom font sizes if defined by the theme.' ),
'show_in_rest' => array(
'schema' => array(
'items' => array(
'type' => 'object',
'properties' => array(
'name' => array(
'type' => 'string',
),
'size' => array(
'type' => 'number',
),
'slug' => array(
'type' => 'string',
),
),
),
),
),
)
);
register_theme_feature(
'editor-gradient-presets',
array(
'type' => 'array',
'description' => __( 'Custom gradient presets if defined by the theme.' ),
'show_in_rest' => array(
'schema' => array(
'items' => array(
'type' => 'object',
'properties' => array(
'name' => array(
'type' => 'string',
),
'gradient' => array(
'type' => 'string',
),
'slug' => array(
'type' => 'string',
),
),
),
),
),
)
);
register_theme_feature(
'editor-spacing-sizes',
array(
'type' => 'array',
'description' => __( 'Custom spacing sizes if defined by the theme.' ),
'show_in_rest' => array(
'schema' => array(
'items' => array(
'type' => 'object',
'properties' => array(
'name' => array(
'type' => 'string',
),
'size' => array(
'type' => 'string',
),
'slug' => array(
'type' => 'string',
),
),
),
),
),
)
);
register_theme_feature(
'editor-styles',
array(
'description' => __( 'Whether theme opts in to the editor styles CSS wrapper.' ),
'show_in_rest' => true,
)
);
register_theme_feature(
'html5',
array(
'type' => 'array',
'description' => __( 'Allows use of HTML5 markup for search forms, comment forms, comment lists, gallery, and caption.' ),
'show_in_rest' => array(
'schema' => array(
'items' => array(
'type' => 'string',
'enum' => array(
'search-form',
'comment-form',
'comment-list',
'gallery',
'caption',
'script',
'style',
),
),
),
),
)
);
register_theme_feature(
'post-formats',
array(
'type' => 'array',
'description' => __( 'Post formats supported.' ),
'show_in_rest' => array(
'name' => 'formats',
'schema' => array(
'items' => array(
'type' => 'string',
'enum' => get_post_format_slugs(),
),
'default' => array( 'standard' ),
),
'prepare_callback' => static function ( $formats ) {
$formats = is_array( $formats ) ? array_values( $formats[0] ) : array();
$formats = array_merge( array( 'standard' ), $formats );

return $formats;
},
),
)
);
register_theme_feature(
'post-thumbnails',
array(
'type' => 'array',
'description' => __( 'The post types that support thumbnails or true if all post types are supported.' ),
'show_in_rest' => array(
'type' => array( 'boolean', 'array' ),
'schema' => array(
'items' => array(
'type' => 'string',
),
),
),
)
);
register_theme_feature(
'responsive-embeds',
array(
'description' => __( 'Whether the theme supports responsive embedded content.' ),
'show_in_rest' => true,
)
);
register_theme_feature(
'title-tag',
array(
'description' => __( 'Whether the theme can manage the document title tag.' ),
'show_in_rest' => true,
)
);
register_theme_feature(
'wp-block-styles',
array(
'description' => __( 'Whether theme opts in to default WordPress block styles for viewing.' ),
'show_in_rest' => true,
)
);
}

/**
* Returns whether the active theme is a block-based theme or not.
*
* @since 5.9.0
*
* @return bool Whether the active theme is a block-based theme or not.
*/
function wp_is_block_theme() {
return wp_get_theme()->is_block_theme();
}

/**
* Given an element name, returns a class name.
*
* Alias of WP_Theme_JSON::get_element_class_name.
*
* @since 6.1.0
*
* @param string $element The name of the element.
*
* @return string The name of the class.
*/
function wp_theme_get_element_class_name( $element ) {
return WP_Theme_JSON::get_element_class_name( $element );
}

/**
* Adds default theme supports for block themes when the 'after_setup_theme' action fires.
*
* See {@see 'after_setup_theme'}.
*
* @since 5.9.0
* @access private
*/
function _add_default_theme_supports() {
if ( ! wp_is_block_theme() ) {
return;
}

add_theme_support( 'post-thumbnails' );
add_theme_support( 'responsive-embeds' );
add_theme_support( 'editor-styles' );
/*
* Makes block themes support HTML5 by default for the comment block and search form
* (which use default template functions) and `[caption]` and `[gallery]` shortcodes.
* Other blocks contain their own HTML5 markup.
*/
add_theme_support( 'html5', array( 'comment-form', 'comment-list', 'search-form', 'gallery', 'caption', 'style', 'script' ) );
add_theme_support( 'automatic-feed-links' );

add_filter( 'should_load_separate_core_block_assets', '__return_true' );

/*
* Remove the Customizer's Menus panel when block theme is active.
*/
add_filter(
'customize_panel_active',
static function ( $active, WP_Customize_Panel $panel ) {
if (
'nav_menus' === $panel->id &&
! current_theme_supports( 'menus' ) &&
! current_theme_supports( 'widgets' )
) {
$active = false;
}
return $active;
},
10,
2
);
}