530 lines
17 KiB
PHP
530 lines
17 KiB
PHP
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<?php
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/**
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* Blocks API: WP_Block class
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*
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* @package WordPress
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* @since 5.5.0
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*/
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/**
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* Class representing a parsed instance of a block.
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*
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* @since 5.5.0
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* @property array $attributes
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*/
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#[AllowDynamicProperties]
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class WP_Block {
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/**
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* Original parsed array representation of block.
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*
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* @since 5.5.0
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* @var array
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*/
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public $parsed_block;
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/**
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* Name of block.
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*
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* @example "core/paragraph"
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*
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* @since 5.5.0
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* @var string
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*/
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public $name;
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/**
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* Block type associated with the instance.
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*
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* @since 5.5.0
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* @var WP_Block_Type
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*/
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public $block_type;
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/**
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* Block context values.
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*
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* @since 5.5.0
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* @var array
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*/
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public $context = array();
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/**
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* All available context of the current hierarchy.
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*
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* @since 5.5.0
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* @var array
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* @access protected
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*/
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protected $available_context;
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/**
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* Block type registry.
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*
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* @since 5.9.0
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* @var WP_Block_Type_Registry
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* @access protected
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*/
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protected $registry;
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/**
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* List of inner blocks (of this same class)
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*
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* @since 5.5.0
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* @var WP_Block_List
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*/
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public $inner_blocks = array();
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/**
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* Resultant HTML from inside block comment delimiters after removing inner
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* blocks.
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*
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* @example "...Just <!-- wp:test /--> testing..." -> "Just testing..."
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*
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* @since 5.5.0
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* @var string
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*/
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public $inner_html = '';
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/**
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* List of string fragments and null markers where inner blocks were found
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*
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* @example array(
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* 'inner_html' => 'BeforeInnerAfter',
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* 'inner_blocks' => array( block, block ),
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* 'inner_content' => array( 'Before', null, 'Inner', null, 'After' ),
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* )
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*
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* @since 5.5.0
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* @var array
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*/
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public $inner_content = array();
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/**
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* Constructor.
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*
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* Populates object properties from the provided block instance argument.
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*
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* The given array of context values will not necessarily be available on
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* the instance itself, but is treated as the full set of values provided by
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* the block's ancestry. This is assigned to the private `available_context`
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* property. Only values which are configured to consumed by the block via
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* its registered type will be assigned to the block's `context` property.
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*
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* @since 5.5.0
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*
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* @param array $block Array of parsed block properties.
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* @param array $available_context Optional array of ancestry context values.
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* @param WP_Block_Type_Registry $registry Optional block type registry.
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*/
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public function __construct( $block, $available_context = array(), $registry = null ) {
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$this->parsed_block = $block;
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$this->name = $block['blockName'];
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if ( is_null( $registry ) ) {
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$registry = WP_Block_Type_Registry::get_instance();
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}
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$this->registry = $registry;
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$this->block_type = $registry->get_registered( $this->name );
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$this->available_context = $available_context;
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if ( ! empty( $this->block_type->uses_context ) ) {
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foreach ( $this->block_type->uses_context as $context_name ) {
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if ( array_key_exists( $context_name, $this->available_context ) ) {
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$this->context[ $context_name ] = $this->available_context[ $context_name ];
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}
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}
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}
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if ( ! empty( $block['innerBlocks'] ) ) {
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$child_context = $this->available_context;
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if ( ! empty( $this->block_type->provides_context ) ) {
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foreach ( $this->block_type->provides_context as $context_name => $attribute_name ) {
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if ( array_key_exists( $attribute_name, $this->attributes ) ) {
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$child_context[ $context_name ] = $this->attributes[ $attribute_name ];
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}
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}
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}
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$this->inner_blocks = new WP_Block_List( $block['innerBlocks'], $child_context, $registry );
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}
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if ( ! empty( $block['innerHTML'] ) ) {
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$this->inner_html = $block['innerHTML'];
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}
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if ( ! empty( $block['innerContent'] ) ) {
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$this->inner_content = $block['innerContent'];
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}
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}
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/**
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* Returns a value from an inaccessible property.
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*
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* This is used to lazily initialize the `attributes` property of a block,
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* such that it is only prepared with default attributes at the time that
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* the property is accessed. For all other inaccessible properties, a `null`
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* value is returned.
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*
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* @since 5.5.0
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*
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* @param string $name Property name.
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* @return array|null Prepared attributes, or null.
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*/
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public function __get( $name ) {
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if ( 'attributes' === $name ) {
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$this->attributes = isset( $this->parsed_block['attrs'] ) ?
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$this->parsed_block['attrs'] :
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array();
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if ( ! is_null( $this->block_type ) ) {
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$this->attributes = $this->block_type->prepare_attributes_for_render( $this->attributes );
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}
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return $this->attributes;
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}
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return null;
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}
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/**
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* Processes the block bindings and updates the block attributes with the values from the sources.
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*
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* A block might contain bindings in its attributes. Bindings are mappings
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* between an attribute of the block and a source. A "source" is a function
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* registered with `register_block_bindings_source()` that defines how to
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* retrieve a value from outside the block, e.g. from post meta.
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*
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* This function will process those bindings and update the block's attributes
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* with the values coming from the bindings.
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*
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* ### Example
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*
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* The "bindings" property for an Image block might look like this:
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*
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* ```json
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* {
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* "metadata": {
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* "bindings": {
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* "title": {
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* "source": "core/post-meta",
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* "args": { "key": "text_custom_field" }
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* },
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* "url": {
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* "source": "core/post-meta",
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* "args": { "key": "url_custom_field" }
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* }
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* }
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* }
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* }
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* ```
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*
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* The above example will replace the `title` and `url` attributes of the Image
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* block with the values of the `text_custom_field` and `url_custom_field` post meta.
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*
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* @since 6.5.0
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*
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* @return array The computed block attributes for the provided block bindings.
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*/
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private function process_block_bindings() {
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$parsed_block = $this->parsed_block;
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$computed_attributes = array();
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$supported_block_attributes = array(
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'core/paragraph' => array( 'content' ),
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'core/heading' => array( 'content' ),
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'core/image' => array( 'id', 'url', 'title', 'alt' ),
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'core/button' => array( 'url', 'text', 'linkTarget', 'rel' ),
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);
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// If the block doesn't have the bindings property, isn't one of the supported
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// block types, or the bindings property is not an array, return the block content.
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if (
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! isset( $supported_block_attributes[ $this->name ] ) ||
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empty( $parsed_block['attrs']['metadata']['bindings'] ) ||
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! is_array( $parsed_block['attrs']['metadata']['bindings'] )
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) {
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return $computed_attributes;
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}
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foreach ( $parsed_block['attrs']['metadata']['bindings'] as $attribute_name => $block_binding ) {
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// If the attribute is not in the supported list, process next attribute.
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if ( ! in_array( $attribute_name, $supported_block_attributes[ $this->name ], true ) ) {
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continue;
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}
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// If no source is provided, or that source is not registered, process next attribute.
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if ( ! isset( $block_binding['source'] ) || ! is_string( $block_binding['source'] ) ) {
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continue;
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}
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$block_binding_source = get_block_bindings_source( $block_binding['source'] );
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if ( null === $block_binding_source ) {
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continue;
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}
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$source_args = ! empty( $block_binding['args'] ) && is_array( $block_binding['args'] ) ? $block_binding['args'] : array();
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$source_value = $block_binding_source->get_value( $source_args, $this, $attribute_name );
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// If the value is not null, process the HTML based on the block and the attribute.
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if ( ! is_null( $source_value ) ) {
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$computed_attributes[ $attribute_name ] = $source_value;
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}
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}
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return $computed_attributes;
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}
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/**
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* Depending on the block attribute name, replace its value in the HTML based on the value provided.
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*
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* @since 6.5.0
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*
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* @param string $block_content Block content.
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* @param string $attribute_name The attribute name to replace.
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* @param mixed $source_value The value used to replace in the HTML.
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* @return string The modified block content.
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*/
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private function replace_html( string $block_content, string $attribute_name, $source_value ) {
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$block_type = $this->block_type;
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if ( ! isset( $block_type->attributes[ $attribute_name ]['source'] ) ) {
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return $block_content;
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}
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// Depending on the attribute source, the processing will be different.
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switch ( $block_type->attributes[ $attribute_name ]['source'] ) {
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case 'html':
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case 'rich-text':
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$block_reader = new WP_HTML_Tag_Processor( $block_content );
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// TODO: Support for CSS selectors whenever they are ready in the HTML API.
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// In the meantime, support comma-separated selectors by exploding them into an array.
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$selectors = explode( ',', $block_type->attributes[ $attribute_name ]['selector'] );
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// Add a bookmark to the first tag to be able to iterate over the selectors.
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$block_reader->next_tag();
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$block_reader->set_bookmark( 'iterate-selectors' );
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// TODO: This shouldn't be needed when the `set_inner_html` function is ready.
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// Store the parent tag and its attributes to be able to restore them later in the button.
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// The button block has a wrapper while the paragraph and heading blocks don't.
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if ( 'core/button' === $this->name ) {
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$button_wrapper = $block_reader->get_tag();
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$button_wrapper_attribute_names = $block_reader->get_attribute_names_with_prefix( '' );
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$button_wrapper_attrs = array();
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foreach ( $button_wrapper_attribute_names as $name ) {
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$button_wrapper_attrs[ $name ] = $block_reader->get_attribute( $name );
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}
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}
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foreach ( $selectors as $selector ) {
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// If the parent tag, or any of its children, matches the selector, replace the HTML.
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if ( strcasecmp( $block_reader->get_tag( $selector ), $selector ) === 0 || $block_reader->next_tag(
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array(
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'tag_name' => $selector,
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)
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) ) {
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$block_reader->release_bookmark( 'iterate-selectors' );
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// TODO: Use `set_inner_html` method whenever it's ready in the HTML API.
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// Until then, it is hardcoded for the paragraph, heading, and button blocks.
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// Store the tag and its attributes to be able to restore them later.
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$selector_attribute_names = $block_reader->get_attribute_names_with_prefix( '' );
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$selector_attrs = array();
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foreach ( $selector_attribute_names as $name ) {
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$selector_attrs[ $name ] = $block_reader->get_attribute( $name );
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}
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$selector_markup = "<$selector>" . wp_kses_post( $source_value ) . "</$selector>";
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$amended_content = new WP_HTML_Tag_Processor( $selector_markup );
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$amended_content->next_tag();
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foreach ( $selector_attrs as $attribute_key => $attribute_value ) {
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$amended_content->set_attribute( $attribute_key, $attribute_value );
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}
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if ( 'core/paragraph' === $this->name || 'core/heading' === $this->name ) {
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return $amended_content->get_updated_html();
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}
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if ( 'core/button' === $this->name ) {
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$button_markup = "<$button_wrapper>{$amended_content->get_updated_html()}</$button_wrapper>";
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$amended_button = new WP_HTML_Tag_Processor( $button_markup );
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$amended_button->next_tag();
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foreach ( $button_wrapper_attrs as $attribute_key => $attribute_value ) {
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$amended_button->set_attribute( $attribute_key, $attribute_value );
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}
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return $amended_button->get_updated_html();
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}
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} else {
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$block_reader->seek( 'iterate-selectors' );
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}
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}
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$block_reader->release_bookmark( 'iterate-selectors' );
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return $block_content;
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case 'attribute':
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$amended_content = new WP_HTML_Tag_Processor( $block_content );
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if ( ! $amended_content->next_tag(
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array(
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// TODO: build the query from CSS selector.
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'tag_name' => $block_type->attributes[ $attribute_name ]['selector'],
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)
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) ) {
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|
|
return $block_content;
|
||
|
|
}
|
||
|
|
$amended_content->set_attribute( $block_type->attributes[ $attribute_name ]['attribute'], $source_value );
|
||
|
|
return $amended_content->get_updated_html();
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return $block_content;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Generates the render output for the block.
|
||
|
|
*
|
||
|
|
* @since 5.5.0
|
||
|
|
* @since 6.5.0 Added block bindings processing.
|
||
|
|
*
|
||
|
|
* @global WP_Post $post Global post object.
|
||
|
|
*
|
||
|
|
* @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,
|
||
|
|
)
|
||
|
|
);
|
||
|
|
|
||
|
|
// Process the block bindings and get attributes updated with the values from the sources.
|
||
|
|
$computed_attributes = $this->process_block_bindings();
|
||
|
|
if ( ! empty( $computed_attributes ) ) {
|
||
|
|
// Merge the computed attributes with the original attributes.
|
||
|
|
$this->attributes = array_merge( $this->attributes, $computed_attributes );
|
||
|
|
}
|
||
|
|
|
||
|
|
$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 ) {
|
||
|
|
if ( is_string( $chunk ) ) {
|
||
|
|
$block_content .= $chunk;
|
||
|
|
} else {
|
||
|
|
$inner_block = $this->inner_blocks[ $index ];
|
||
|
|
$parent_block = $this;
|
||
|
|
|
||
|
|
/** This filter is documented in wp-includes/blocks.php */
|
||
|
|
$pre_render = apply_filters( 'pre_render_block', null, $inner_block->parsed_block, $parent_block );
|
||
|
|
|
||
|
|
if ( ! is_null( $pre_render ) ) {
|
||
|
|
$block_content .= $pre_render;
|
||
|
|
} else {
|
||
|
|
$source_block = $inner_block->parsed_block;
|
||
|
|
|
||
|
|
/** This filter is documented in wp-includes/blocks.php */
|
||
|
|
$inner_block->parsed_block = apply_filters( 'render_block_data', $inner_block->parsed_block, $source_block, $parent_block );
|
||
|
|
|
||
|
|
/** This filter is documented in wp-includes/blocks.php */
|
||
|
|
$inner_block->context = apply_filters( 'render_block_context', $inner_block->context, $inner_block->parsed_block, $parent_block );
|
||
|
|
|
||
|
|
$block_content .= $inner_block->render();
|
||
|
|
}
|
||
|
|
|
||
|
|
++$index;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( ! empty( $computed_attributes ) && ! empty( $block_content ) ) {
|
||
|
|
foreach ( $computed_attributes as $attribute_name => $source_value ) {
|
||
|
|
$block_content = $this->replace_html( $block_content, $attribute_name, $source_value );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
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_handles ) ) ) {
|
||
|
|
foreach ( $this->block_type->script_handles as $script_handle ) {
|
||
|
|
wp_enqueue_script( $script_handle );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( ! empty( $this->block_type->view_script_handles ) ) {
|
||
|
|
foreach ( $this->block_type->view_script_handles as $view_script_handle ) {
|
||
|
|
wp_enqueue_script( $view_script_handle );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( ! empty( $this->block_type->view_script_module_ids ) ) {
|
||
|
|
foreach ( $this->block_type->view_script_module_ids as $view_script_module_id ) {
|
||
|
|
wp_enqueue_script_module( $view_script_module_id );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( ( ! empty( $this->block_type->style_handles ) ) ) {
|
||
|
|
foreach ( $this->block_type->style_handles as $style_handle ) {
|
||
|
|
wp_enqueue_style( $style_handle );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( ( ! empty( $this->block_type->view_style_handles ) ) ) {
|
||
|
|
foreach ( $this->block_type->view_style_handles as $view_style_handle ) {
|
||
|
|
wp_enqueue_style( $view_style_handle );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Filters the content of a single block.
|
||
|
|
*
|
||
|
|
* @since 5.0.0
|
||
|
|
* @since 5.9.0 The `$instance` parameter was added.
|
||
|
|
*
|
||
|
|
* @param string $block_content The block content.
|
||
|
|
* @param array $block The full block, including name and attributes.
|
||
|
|
* @param WP_Block $instance The block instance.
|
||
|
|
*/
|
||
|
|
$block_content = apply_filters( 'render_block', $block_content, $this->parsed_block, $this );
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Filters the content of a single block.
|
||
|
|
*
|
||
|
|
* The dynamic portion of the hook name, `$name`, refers to
|
||
|
|
* the block name, e.g. "core/paragraph".
|
||
|
|
*
|
||
|
|
* @since 5.7.0
|
||
|
|
* @since 5.9.0 The `$instance` parameter was added.
|
||
|
|
*
|
||
|
|
* @param string $block_content The block content.
|
||
|
|
* @param array $block The full block, including name and attributes.
|
||
|
|
* @param WP_Block $instance The block instance.
|
||
|
|
*/
|
||
|
|
$block_content = apply_filters( "render_block_{$this->name}", $block_content, $this->parsed_block, $this );
|
||
|
|
|
||
|
|
return $block_content;
|
||
|
|
}
|
||
|
|
}
|