As the sun rises and the forest mist clears, and the clouds return and the caves darken, these changes of light and shadow are the morning and evening in the mountains. Wildflowers bloom with their subtle fragrance, fine trees flourish with their dense shade, the wind and frost are pure and clean, and the water recedes to reveal the rocks—these are the four seasons in the mountains. Going out in the morning and returning in the evening, the scenery of the four seasons is different, and the joy is endless.至于负者歌于途,行者休于树,前者呼,后者应,伛偻提携,往来而不绝者,滁人游也。临溪而渔,溪深而鱼肥,酿泉为酒,泉香而酒洌,山肴野蔌,杂然而前陈者,太守宴也。宴酣之乐,非丝非竹,射者中,弈者胜,觥筹交错,起坐而喧哗者,众宾欢也。苍颜白发,颓然乎其间者,太守醉也。
<?php
/**
* Border block support flag.
*
* @package WordPress
* @since 5.8.0
*/
/**
* Registers the style attribute used by the border feature if needed for block
* types that support borders.
*
* @since 5.8.0
* @since 6.1.0 Improved conditional blocks optimization.
* @access private
*
* @param WP_Block_Type $block_type Block Type.
*/
function wp_register_border_support( $block_type ) {
// Setup attributes and styles within that if needed.
if ( ! $block_type->attributes ) {
$block_type->attributes = array();
}
if ( block_has_support( $block_type, '__experimentalBorder' ) && ! array_key_exists( 'style', $block_type->attributes ) ) {
$block_type->attributes['style'] = array(
'type' => 'object',
);
}
if ( wp_has_border_feature_support( $block_type, 'color' ) && ! array_key_exists( 'borderColor', $block_type->attributes ) ) {
$block_type->attributes['borderColor'] = array(
'type' => 'string',
);
}
}
/**
* Adds CSS classes and inline styles for border styles to the incoming
* attributes array. This will be applied to the block markup in the front-end.
*
* @since 5.8.0
* @since 6.1.0 Implemented the style engine to generate CSS and classnames.
* @access private
*
* @param WP_Block_Type $block_type Block type.
* @param array $block_attributes Block attributes.
* @return array Border CSS classes and inline styles.
*/
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 = isset( $block_attributes['style']['border']['color'] ) ? $block_attributes['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 = isset( $block_attributes['style']['border'][ $side ] ) ? $block_attributes['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;
}
/**
* Checks whether the current block type supports the border feature requested.
*
* If the `__experimentalBorder` support flag is a boolean `true` all border
* support features are available. Otherwise, the specific feature's support
* flag nested under `experimentalBorder` must be enabled for the feature
* to be opted into.
*
* @since 5.8.0
* @access private
*
* @param WP_Block_Type $block_type Block type to check for support.
* @param string $feature Name of the feature to check support for.
* @param mixed $default_value Fallback value for feature support, defaults to false.
* @return bool Whether the feature is supported.
*/
function wp_has_border_feature_support( $block_type, $feature, $default_value = false ) {
// Check if all border support features have been opted into via `"__experimentalBorder": true`.
if ( $block_type instanceof WP_Block_Type ) {
$block_type_supports_border = isset( $block_type->supports['__experimentalBorder'] )
? $block_type->supports['__experimentalBorder']
: $default_value;
if ( true === $block_type_supports_border ) {
return true;
}
}
// Check if the specific feature has been opted into individually
// via nested flag under `__experimentalBorder`.
return block_has_support( $block_type, array( '__experimentalBorder', $feature ), $default_value );
}
// Register the block support.
WP_Block_Supports::get_instance()->register(
'border',
array(
'register_attribute' => 'wp_register_border_support',
'apply' => 'wp_apply_border_support',
)
);