wp_apply_border_support

wp_apply_border_support: 这是一个用于对HTML元素应用边界支持的函数。它接收一个HTML字符串和一个border参数作为输入，并返回修改后的带有边框的HTML字符串。

将边界样式的CSS类和内联样式添加到传入的属性数组中。这将被应用到前端的块标记中。

function wp_apply_border_support( $block_type, $block_attributes ) {
	if ( wp_should_skip_block_supports_serialization( $block_type, 'border' ) ) {
		return array();
	}

	$border_block_styles      = array();
	$has_border_color_support = wp_has_border_feature_support( $block_type, 'color' );
	$has_border_width_support = wp_has_border_feature_support( $block_type, 'width' );

	// Border radius.
	if (
		wp_has_border_feature_support( $block_type, 'radius' ) &&
		isset( $block_attributes['style']['border']['radius'] ) &&
		! wp_should_skip_block_supports_serialization( $block_type, '__experimentalBorder', 'radius' )
	) {
		$border_radius = $block_attributes['style']['border']['radius'];

		if ( is_numeric( $border_radius ) ) {
			$border_radius .= 'px';
		}

		$border_block_styles['radius'] = $border_radius;
	}

	// Border style.
	if (
		wp_has_border_feature_support( $block_type, 'style' ) &&
		isset( $block_attributes['style']['border']['style'] ) &&
		! wp_should_skip_block_supports_serialization( $block_type, '__experimentalBorder', 'style' )
	) {
		$border_block_styles['style'] = $block_attributes['style']['border']['style'];
	}

	// Border width.
	if (
		$has_border_width_support &&
		isset( $block_attributes['style']['border']['width'] ) &&
		! wp_should_skip_block_supports_serialization( $block_type, '__experimentalBorder', 'width' )
	) {
		$border_width = $block_attributes['style']['border']['width'];

		// This check handles original unitless implementation.
		if ( is_numeric( $border_width ) ) {
			$border_width .= 'px';
		}

		$border_block_styles['width'] = $border_width;
	}

	// Border color.
	if (
		$has_border_color_support &&
		! wp_should_skip_block_supports_serialization( $block_type, '__experimentalBorder', 'color' )
	) {
		$preset_border_color          = array_key_exists( 'borderColor', $block_attributes ) ? "var:preset|color|{$block_attributes['borderColor']}" : null;
		$custom_border_color          = _wp_array_get( $block_attributes, array( 'style', 'border', 'color' ), null );
		$border_block_styles['color'] = $preset_border_color ? $preset_border_color : $custom_border_color;
	}

	// Generates styles for individual border sides.
	if ( $has_border_color_support || $has_border_width_support ) {
		foreach ( array( 'top', 'right', 'bottom', 'left' ) as $side ) {
			$border                       = _wp_array_get( $block_attributes, array( 'style', 'border', $side ), null );
			$border_side_values           = array(
				'width' => isset( $border['width'] ) && ! wp_should_skip_block_supports_serialization( $block_type, '__experimentalBorder', 'width' ) ? $border['width'] : null,
				'color' => isset( $border['color'] ) && ! wp_should_skip_block_supports_serialization( $block_type, '__experimentalBorder', 'color' ) ? $border['color'] : null,
				'style' => isset( $border['style'] ) && ! wp_should_skip_block_supports_serialization( $block_type, '__experimentalBorder', 'style' ) ? $border['style'] : null,
			);
			$border_block_styles[ $side ] = $border_side_values;
		}
	}

	// Collect classes and styles.
	$attributes = array();
	$styles     = wp_style_engine_get_styles( array( 'border' => $border_block_styles ) );

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

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

	return $attributes;
}