is_block_editor() ) {
remove_action( 'admin_print_styles', 'wp_print_font_faces', 50 );
}
}
/**
* Print fonts that are used in global styles or block-level settings.
*/
public function print_font_faces() {
$fonts = WP_Font_Face_Resolver::get_fonts_from_theme_json();
$font_slug_aliases = $this->get_font_slug_aliases();
$fonts_to_print = array();
$this->collect_global_styles_fonts();
$fonts_in_use = array_values( array_unique( $this->fonts_in_use, SORT_STRING ) );
$fonts_in_use = array_map(
function ( $font_slug ) use ( $font_slug_aliases ) {
return $font_slug_aliases[ $font_slug ] ?? $font_slug;
},
$this->fonts_in_use
);
foreach ( $fonts as $font_faces ) {
$font_family = $font_faces[0]['font-family'] ?? '';
if ( in_array( $this->format_font( $font_family ), $fonts_in_use, true ) ) {
$fonts_to_print[] = $font_faces;
}
}
if ( ! empty( $fonts_to_print ) ) {
wp_print_font_faces( $fonts_to_print );
}
}
/**
* Collect fonts used for global styles settings.
*/
public function collect_global_styles_fonts() {
$global_styles = wp_get_global_styles();
$global_styles_font_slug = $this->get_font_slug_from_setting( $global_styles );
if ( $global_styles_font_slug ) {
$this->add_font( $global_styles_font_slug );
}
if ( isset( $global_styles['blocks'] ) ) {
foreach ( $global_styles['blocks'] as $setting ) {
$font_slug = $this->get_font_slug_from_setting( $setting );
if ( $font_slug ) {
$this->add_font( $font_slug );
}
}
}
if ( isset( $global_styles['elements'] ) ) {
foreach ( $global_styles['elements'] as $setting ) {
$font_slug = $this->get_font_slug_from_setting( $setting );
if ( $font_slug ) {
$this->add_font( $font_slug );
}
}
}
}
/**
* Collect fonts used for block-level settings.
*
* @filter pre_render_block
*
* @param string|null $content The pre-rendered content. Default null.
* @param array $parsed_block The block being rendered.
*/
public function collect_block_fonts( $content, $parsed_block ) {
if ( ! is_admin() && isset( $parsed_block['attrs']['fontFamily'] ) ) {
$block_font_family = $parsed_block['attrs']['fontFamily'];
$this->add_font( $block_font_family );
}
return $content;
}
/**
* Add the specify font to the fonts_in_use list.
*
* @param string $font_slug The font slug.
*/
public function add_font( $font_slug ) {
if ( is_string( $font_slug ) ) {
$this->fonts_in_use[] = $this->format_font( $font_slug );
}
}
/**
* Format the given font slug.
*
* @example "ABeeZee" formats to "abeezee"
* @example "ADLaM Display" formats to "adlam-display"
* @param string $font_slug The font slug.
* @return string The formatted font slug.
*/
public function format_font( $font_slug ) {
return _wp_to_kebab_case( strtolower( $font_slug ) );
}
/**
* Get the font slug aliases that maps the font slug to the font family if they are different.
*
* The font definition may define an alias slug name, so we have to add the map from the slug name to the font family.
* See https://github.com/WordPress/twentytwentyfour/blob/df92472089ede6fae5924c124a93c843b84e8cbd/theme.json#L215.
*/
public function get_font_slug_aliases() {
$font_slug_aliases = array();
$theme_json = WP_Theme_JSON_Resolver::get_theme_data();
$raw_data = $theme_json->get_data();
if ( ! empty( $raw_data['settings']['typography']['fontFamilies'] ) ) {
foreach ( $raw_data['settings']['typography']['fontFamilies'] as $font ) {
$font_family_name = $this->format_font( $this->get_font_family_name( $font ) );
$font_slug = $font['slug'] ?? '';
if ( $font_slug && $font_slug !== $font_family_name && ! array_key_exists( $font_slug, $font_slug_aliases ) ) {
$font_slug_aliases[ $font_slug ] = $font_family_name;
}
}
}
return $font_slug_aliases;
}
/**
* Get the font family name from a font.
*
* @param array $font The font definition object.
*/
public static function get_font_family_name( $font ) {
$font_family = $font['fontFamily'];
if ( str_contains( $font_family, ',' ) ) {
$font_family = explode( ',', $font_family )[0];
}
return trim( $font_family, "\"'" );
}
/**
* Get the font family slug from a settings array.
*
* @param array $setting The settings object.
*
* @return string|null
*/
public function get_font_slug_from_setting( $setting ) {
if ( ! isset( $setting['typography']['fontFamily'] ) ) {
return null;
}
$font_family = $setting['typography']['fontFamily'];
// The font family may be a reference to a path to the value stored at that location,
// e.g.: { "ref": "styles.elements.heading.typography.fontFamily" }.
// Ignore it as we also get the value stored at that location from the setting.
if ( ! is_string( $font_family ) ) {
return null;
}
// Full string: var(--wp--preset--font-family--slug).
// We do not care about the origin of the font, only its slug.
preg_match( '/font-family--(?P.+)\)$/', $font_family, $matches );
if ( isset( $matches['slug'] ) ) {
return $matches['slug'];
}
// Full string: var:preset|font-family|slug
// We do not care about the origin of the font, only its slug.
preg_match( '/font-family\|(?P.+)$/', $font_family, $matches );
if ( isset( $matches['slug'] ) ) {
return $matches['slug'];
}
return $font_family;
}
/**
* Check if the current screen is the block editor.
*
* @return bool
*/
public function is_block_editor() {
if ( function_exists( 'get_current_screen' ) ) {
$current_screen = get_current_screen();
if ( ! empty( $current_screen ) && method_exists( $current_screen, 'is_block_editor' ) && $current_screen->is_block_editor() ) {
return true;
}
}
return false;
}
}