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
/**
* Block Bindings API: WP_Block_Bindings_Source class.
*
* @package WordPress
* @subpackage Block Bindings
* @since 6.5.0
*/
/**
* Class representing block bindings source.
*
* This class is designed for internal use by the Block Bindings registry.
*
* @since 6.5.0
* @access private
*
* @see WP_Block_Bindings_Registry
*/
final class WP_Block_Bindings_Source {
/**
* The name of the source.
*
* @since 6.5.0
* @var string
*/
public $name;
/**
* The label of the source.
*
* @since 6.5.0
* @var string
*/
public $label;
/**
* The function used to get the value from the source.
*
* @since 6.5.0
* @var callable
*/
private $get_value_callback;
/**
* The context added to the blocks needed by the source.
*
* @since 6.5.0
* @var string[]|null
*/
public $uses_context = null;
/**
* Constructor.
*
* Do not use this constructor directly. Instead, use the
* `WP_Block_Bindings_Registry::register` method or the `register_block_bindings_source` function.
*
* @since 6.5.0
*
* @param string $name The name of the source.
* @param array $source_properties The properties of the source.
*/
public function __construct( string $name, array $source_properties ) {
$this->name = $name;
foreach ( $source_properties as $property_name => $property_value ) {
$this->$property_name = $property_value;
}
}
/**
* Calls the callback function specified in the `$get_value_callback` property
* with the given arguments and returns the result. It can be modified with
* `block_bindings_source_value` filter.
*
* @since 6.5.0
* @since 6.7.0 `block_bindings_source_value` filter was added.
*
* @param array $source_args Array containing source arguments used to look up the override value, i.e. {"key": "foo"}.
* @param WP_Block $block_instance The block instance.
* @param string $attribute_name The name of the target attribute.
* @return mixed The value of the source.
*/
public function get_value( array $source_args, $block_instance, string $attribute_name ) {
$value = call_user_func_array( $this->get_value_callback, array( $source_args, $block_instance, $attribute_name ) );
/**
* Filters the output of a block bindings source.
*
* @since 6.7.0
*
* @param mixed $value The computed value for the source.
* @param string $name The name of the source.
* @param array $source_args Array containing source arguments used to look up the override value, i.e. { "key": "foo" }.
* @param WP_Block $block_instance The block instance.
* @param string $attribute_name The name of an attribute.
*/
return apply_filters( 'block_bindings_source_value', $value, $this->name, $source_args, $block_instance, $attribute_name );
}
/**
* Wakeup magic method.
*
* @since 6.5.0
*/
public function __wakeup() {
throw new \LogicException( __CLASS__ . ' should never be unserialized' );
}
}