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<?php
/**
* Blocks API: WP_Block class
*
* @package WordPress
* @since 5.5.0
*/
/**
* Class representing a parsed instance of a block.
*
* @since 5.5.0
* @property array $attributes
*/
class WP_Block {
/**
* Original parsed array representation of block.
*
* @since 5.5.0
* @var array
*/
public $parsed_block;
/**
* Name of block.
*
* @example "core/paragraph"
*
* @since 5.5.0
* @var string
*/
public $name;
/**
* Block type associated with the instance.
*
* @since 5.5.0
* @var WP_Block_Type
*/
public $block_type;
/**
* Block context values.
*
* @since 5.5.0
* @var array
*/
public $context = array();
/**
* All available context of the current hierarchy.
*
* @since 5.5.0
* @var array
* @access protected
*/
protected $available_context;
/**
* List of inner blocks (of this same class)
*
* @since 5.5.0
* @var WP_Block[]
*/
public $inner_blocks = array();
/**
* Resultant HTML from inside block comment delimiters after removing inner
* blocks.
*
* @example "...Just <!-- wp:test /--> testing..." -> "Just testing..."
*
* @since 5.5.0
* @var string
*/
public $inner_html = '';
/**
* List of string fragments and null markers where inner blocks were found
*
* @example array(
* 'inner_html' => 'BeforeInnerAfter',
* 'inner_blocks' => array( block, block ),
* 'inner_content' => array( 'Before', null, 'Inner', null, 'After' ),
* )
*
* @since 5.5.0
* @var array
*/
public $inner_content = array();
/**
* Constructor.
*
* Populates object properties from the provided block instance argument.
*
* The given array of context values will not necessarily be available on
* the instance itself, but is treated as the full set of values provided by
* the block's ancestry. This is assigned to the private `available_context`
* property. Only values which are configured to consumed by the block via
* its registered type will be assigned to the block's `context` property.
*
* @since 5.5.0
*
* @param array $block Array of parsed block properties.
* @param array $available_context Optional array of ancestry context values.
* @param WP_Block_Type_Registry $registry Optional block type registry.
*/
public function __construct( $block, $available_context = array(), $registry = null ) {
$this->parsed_block = $block;
$this->name = $block['blockName'];
if ( is_null( $registry ) ) {
$registry = WP_Block_Type_Registry::get_instance();
}
$this->block_type = $registry->get_registered( $this->name );
$this->available_context = $available_context;
if ( ! empty( $this->block_type->uses_context ) ) {
foreach ( $this->block_type->uses_context as $context_name ) {
if ( array_key_exists( $context_name, $this->available_context ) ) {
$this->context[ $context_name ] = $this->available_context[ $context_name ];
}
}
}
if ( ! empty( $block['innerBlocks'] ) ) {
$child_context = $this->available_context;
if ( ! empty( $this->block_type->provides_context ) ) {
foreach ( $this->block_type->provides_context as $context_name => $attribute_name ) {
if ( array_key_exists( $attribute_name, $this->attributes ) ) {
$child_context[ $context_name ] = $this->attributes[ $attribute_name ];
}
}
}
$this->inner_blocks = new WP_Block_List( $block['innerBlocks'], $child_context, $registry );
}
if ( ! empty( $block['innerHTML'] ) ) {
$this->inner_html = $block['innerHTML'];
}
if ( ! empty( $block['innerContent'] ) ) {
$this->inner_content = $block['innerContent'];
}
}
/**
* Returns a value from an inaccessible property.
*
* This is used to lazily initialize the `attributes` property of a block,
* such that it is only prepared with default attributes at the time that
* the property is accessed. For all other inaccessible properties, a `null`
* value is returned.
*
* @since 5.5.0
*
* @param string $name Property name.
* @return array|null Prepared attributes, or null.
*/
public function __get( $name ) {
if ( 'attributes' === $name ) {
$this->attributes = isset( $this->parsed_block['attrs'] ) ?
$this->parsed_block['attrs'] :
array();
if ( ! is_null( $this->block_type ) ) {
$this->attributes = $this->block_type->prepare_attributes_for_render( $this->attributes );
}
return $this->attributes;
}
return null;
}
/**
* Generates the render output for the block.
*
* @since 5.5.0
*
* @param array $options {
* Optional options object.
*
* @type bool $dynamic Defaults to 'true'. Optionally set to false to avoid using the block's render_callback.
* }
* @return string Rendered block output.
*/
public function render( $options = array() ) {
global $post;
$options = wp_parse_args(
$options,
array(
'dynamic' => true,
)
);
$is_dynamic = $options['dynamic'] && $this->name && null !== $this->block_type && $this->block_type->is_dynamic();
$block_content = '';
if ( ! $options['dynamic'] || empty( $this->block_type->skip_inner_blocks ) ) {
$index = 0;
foreach ( $this->inner_content as $chunk ) {
$block_content .= is_string( $chunk ) ?
$chunk :
$this->inner_blocks[ $index++ ]->render();
}
}
if ( $is_dynamic ) {
$global_post = $post;
$parent = WP_Block_Supports::$block_to_render;
WP_Block_Supports::$block_to_render = $this->parsed_block;
$block_content = (string) call_user_func( $this->block_type->render_callback, $this->attributes, $block_content, $this );
WP_Block_Supports::$block_to_render = $parent;
$post = $global_post;
}
if ( ! empty( $this->block_type->script ) ) {
wp_enqueue_script( $this->block_type->script );
}
if ( ! empty( $this->block_type->style ) ) {
wp_enqueue_style( $this->block_type->style );
}
/**
* Filters the content of a single block.
*
* @since 5.0.0
*
* @param string $block_content The block content about to be appended.
* @param array $block The full block, including name and attributes.
*/
$block_content = apply_filters( 'render_block', $block_content, $this->parsed_block );
/**
* Filters the content of a single block.
*
* The dynamic portion of the hook name, `$name`, refers to
* the block name, e.g. "core/paragraph".
*
* @since 5.7.0
*
* @param string $block_content The block content about to be appended.
* @param array $block The full block, including name and attributes.
*/
$block_content = apply_filters( "render_block_{$this->name}", $block_content, $this->parsed_block );
return $block_content;
}
}