wp_register_typography_support( WP_Block_Type $block_type )

19function wp_register_typography_support( $block_type ) {20	if ( ! ( $block_type instanceof WP_Block_Type ) ) {21		return;22	}23 24	$typography_supports = $block_type->supports['typography'] ?? false;25	if ( ! $typography_supports ) {26		return;27	}28 29	$has_font_family_support     = $typography_supports['__experimentalFontFamily'] ?? false;30	$has_font_size_support       = $typography_supports['fontSize'] ?? false;31	$has_font_style_support      = $typography_supports['__experimentalFontStyle'] ?? false;32	$has_font_weight_support     = $typography_supports['__experimentalFontWeight'] ?? false;33	$has_letter_spacing_support  = $typography_supports['__experimentalLetterSpacing'] ?? false;34	$has_line_height_support     = $typography_supports['lineHeight'] ?? false;35	$has_text_align_support      = $typography_supports['textAlign'] ?? false;36	$has_text_columns_support    = $typography_supports['textColumns'] ?? false;37	$has_text_decoration_support = $typography_supports['__experimentalTextDecoration'] ?? false;38	$has_text_transform_support  = $typography_supports['__experimentalTextTransform'] ?? false;39	$has_text_indent_support     = $typography_supports['textIndent'] ?? false;40	$has_writing_mode_support    = $typography_supports['__experimentalWritingMode'] ?? false;41 42	$has_typography_support = $has_font_family_support43		|| $has_font_size_support44		|| $has_font_style_support45		|| $has_font_weight_support46		|| $has_letter_spacing_support47		|| $has_line_height_support48		|| $has_text_align_support49		|| $has_text_columns_support50		|| $has_text_decoration_support51		|| $has_text_transform_support52		|| $has_text_indent_support53		|| $has_writing_mode_support;54 55	if ( ! $block_type->attributes ) {56		$block_type->attributes = array();57	}58 59	if ( $has_typography_support && ! array_key_exists( 'style', $block_type->attributes ) ) {60		$block_type->attributes['style'] = array(61			'type' => 'object',62		);63	}64 65	if ( $has_font_size_support && ! array_key_exists( 'fontSize', $block_type->attributes ) ) {66		$block_type->attributes['fontSize'] = array(67			'type' => 'string',68		);69	}70 71	if ( $has_font_family_support && ! array_key_exists( 'fontFamily', $block_type->attributes ) ) {72		$block_type->attributes['fontFamily'] = array(73			'type' => 'string',74		);75	}76}