wp_apply_typography_support

wp_apply_typography_support: 这是一个用于对一个HTML元素应用排版支持的函数。它接受一个HTML字符串和一个排版参数作为输入，并返回应用了排版的修改后的HTML字符串。

在传入的属性数组中添加CSS类和内联样式，用于排版功能，如字体大小。这将被应用到前端的块标记中。

function wp_apply_typography_support( $block_type, $block_attributes ) {
	if ( ! property_exists( $block_type, 'supports' ) ) {
		return array();
	}

	$typography_supports = _wp_array_get( $block_type->supports, array( 'typography' ), false );
	if ( ! $typography_supports ) {
		return array();
	}

	if ( wp_should_skip_block_supports_serialization( $block_type, 'typography' ) ) {
		return array();
	}

	$has_font_family_support     = _wp_array_get( $typography_supports, array( '__experimentalFontFamily' ), false );
	$has_font_size_support       = _wp_array_get( $typography_supports, array( 'fontSize' ), false );
	$has_font_style_support      = _wp_array_get( $typography_supports, array( '__experimentalFontStyle' ), false );
	$has_font_weight_support     = _wp_array_get( $typography_supports, array( '__experimentalFontWeight' ), false );
	$has_letter_spacing_support  = _wp_array_get( $typography_supports, array( '__experimentalLetterSpacing' ), false );
	$has_line_height_support     = _wp_array_get( $typography_supports, array( 'lineHeight' ), false );
	$has_text_decoration_support = _wp_array_get( $typography_supports, array( '__experimentalTextDecoration' ), false );
	$has_text_transform_support  = _wp_array_get( $typography_supports, array( '__experimentalTextTransform' ), false );

	// Whether to skip individual block support features.
	$should_skip_font_size       = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontSize' );
	$should_skip_font_family     = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontFamily' );
	$should_skip_font_style      = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontStyle' );
	$should_skip_font_weight     = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontWeight' );
	$should_skip_line_height     = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'lineHeight' );
	$should_skip_text_decoration = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'textDecoration' );
	$should_skip_text_transform  = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'textTransform' );
	$should_skip_letter_spacing  = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'letterSpacing' );

	$typography_block_styles = array();
	if ( $has_font_size_support && ! $should_skip_font_size ) {
		$preset_font_size                    = array_key_exists( 'fontSize', $block_attributes )
			? "var:preset|font-size|{$block_attributes['fontSize']}"
			: null;
		$custom_font_size                    = isset( $block_attributes['style']['typography']['fontSize'] )
			? $block_attributes['style']['typography']['fontSize']
			: null;
		$typography_block_styles['fontSize'] = $preset_font_size ? $preset_font_size : wp_get_typography_font_size_value(
			array(
				'size' => $custom_font_size,
			)
		);
	}

	if ( $has_font_family_support && ! $should_skip_font_family ) {
		$preset_font_family                    = array_key_exists( 'fontFamily', $block_attributes )
			? "var:preset|font-family|{$block_attributes['fontFamily']}"
			: null;
		$custom_font_family                    = isset( $block_attributes['style']['typography']['fontFamily'] )
			? wp_typography_get_preset_inline_style_value( $block_attributes['style']['typography']['fontFamily'], 'font-family' )
			: null;
		$typography_block_styles['fontFamily'] = $preset_font_family ? $preset_font_family : $custom_font_family;
	}

	if (
		$has_font_style_support &&
		! $should_skip_font_style &&
		isset( $block_attributes['style']['typography']['fontStyle'] )
	) {
		$typography_block_styles['fontStyle'] = wp_typography_get_preset_inline_style_value(
			$block_attributes['style']['typography']['fontStyle'],
			'font-style'
		);
	}

	if (
		$has_font_weight_support &&
		! $should_skip_font_weight &&
		isset( $block_attributes['style']['typography']['fontWeight'] )
	) {
		$typography_block_styles['fontWeight'] = wp_typography_get_preset_inline_style_value(
			$block_attributes['style']['typography']['fontWeight'],
			'font-weight'
		);
	}

	if ( $has_line_height_support && ! $should_skip_line_height ) {
		$typography_block_styles['lineHeight'] = _wp_array_get( $block_attributes, array( 'style', 'typography', 'lineHeight' ) );
	}

	if (
		$has_text_decoration_support &&
		! $should_skip_text_decoration &&
		isset( $block_attributes['style']['typography']['textDecoration'] )
	) {
		$typography_block_styles['textDecoration'] = wp_typography_get_preset_inline_style_value(
			$block_attributes['style']['typography']['textDecoration'],
			'text-decoration'
		);
	}

	if (
		$has_text_transform_support &&
		! $should_skip_text_transform &&
		isset( $block_attributes['style']['typography']['textTransform'] )
	) {
		$typography_block_styles['textTransform'] = wp_typography_get_preset_inline_style_value(
			$block_attributes['style']['typography']['textTransform'],
			'text-transform'
		);
	}

	if (
		$has_letter_spacing_support &&
		! $should_skip_letter_spacing &&
		isset( $block_attributes['style']['typography']['letterSpacing'] )
	) {
		$typography_block_styles['letterSpacing'] = wp_typography_get_preset_inline_style_value(
			$block_attributes['style']['typography']['letterSpacing'],
			'letter-spacing'
		);
	}

	$attributes = array();
	$styles     = wp_style_engine_get_styles(
		array( 'typography' => $typography_block_styles ),
		array( 'convert_vars_to_classnames' => true )
	);

	if ( ! empty( $styles['classnames'] ) ) {
		$attributes['class'] = $styles['classnames'];
	}

	if ( ! empty( $styles['css'] ) ) {
		$attributes['style'] = $styles['css'];
	}

	return $attributes;
}