'', 'font-style' => 'normal', 'font-weight' => '400', 'font-display' => 'fallback', ); /** * Valid font-face property names. * * @since 6.4.0 * * @var string[] */ private $valid_font_face_properties = array( 'ascent-override', 'descent-override', 'font-display', 'font-family', 'font-stretch', 'font-style', 'font-weight', 'font-variant', 'font-feature-settings', 'font-variation-settings', 'line-gap-override', 'size-adjust', 'src', 'unicode-range', ); /** * Valid font-display values. * * @since 6.4.0 * * @var string[] */ private $valid_font_display = array( 'auto', 'block', 'fallback', 'swap', 'optional' ); /** * Generates and prints the `@font-face` styles for the given fonts. * * @since 6.4.0 * * @param array[][] $fonts Optional. The font-families and their font variations. * See {@see wp_print_font_faces()} for the supported fields. * Default empty array. */ public function generate_and_print( array $fonts ) { $fonts = $this->validate_fonts( $fonts ); // Bail out if there are no fonts are given to process. if ( empty( $fonts ) ) { return; } $css = $this->get_css( $fonts ); /* * The font-face CSS is contained within and open a