385 lines
9.4 KiB
PHP
385 lines
9.4 KiB
PHP
<?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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* @property array $context
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* @property WP_Block[] $inner_blocks;
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* @property string $inner_html;
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* @property array $inner_content;
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*/
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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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* 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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* 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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* Map of block property names and their cached value.
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*
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* Some block properties are computed lazily using a getter function. The
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* result is then cached here for subsequent use.
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*
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* @since 5.6.0
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* @var array
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*/
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protected $cached_properties = array();
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/**
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* Creates a block instance from a backing `$parsed_block` array and list of
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* `$available_context`. From these, the block's dynamic properties can be
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* derived.
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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 $parsed_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( $parsed_block, $available_context = array(), $registry = null ) {
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if ( is_null( $registry ) ) {
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$this->registry = WP_Block_Type_Registry::get_instance();
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} else {
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$this->registry = $registry;
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}
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$this->reset( $parsed_block, $available_context );
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}
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/**
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* Changes the backing `$parsed_block` and `$available_context` used to
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* derive the block's dynamic properties.
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*
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* @since 5.6.0
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* @param array $parsed_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 array $cached_properties Optional cache of dynamic properties to use.
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*/
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protected function reset(
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$parsed_block,
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$available_context = array(),
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$cached_properties = array()
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) {
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$this->parsed_block = $parsed_block;
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$this->available_context = $available_context;
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$this->name = $parsed_block['blockName'];
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$this->block_type = $this->registry->get_registered( $this->name );
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$this->cached_properties = $cached_properties;
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}
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/**
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* Getter used for the block's dynamic properties:
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*
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* - `$block->attributes`
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* - `$block->context`
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* - `$block->inner_blocks`
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* - `$block->inner_html`
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* - `$block->inner_content`
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*
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* Each dynamic property is obtained by calling the associated getter
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* function (e.g. `this->get_attributes()`). The result is then cached in
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* `$this->cached_attributes` for subsequent calls.
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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 ( method_exists( $this, "get_$name" ) ) {
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if ( ! isset( $this->cached_properties[ $name ] ) ) {
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$this->cached_properties[ $name ] = $this->{"get_$name"}();
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}
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return $this->cached_properties[ $name ];
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}
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return null;
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}
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/**
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* Block attributes.
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*
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* Use `$block->attributes` to access this.
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*
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* @since 5.6.0
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* @return array
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*/
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protected function get_attributes() {
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$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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return $this->block_type->prepare_attributes_for_render( $attributes );
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}
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return $attributes;
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}
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/**
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* Block context values.
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*
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* Use `$block->context` to access this.
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*
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* @since 5.6.0
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* @return array
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*/
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protected function get_context() {
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$context = array();
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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, $this->available_context ) ) {
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$context[ $context_name ] = $this->available_context[ $context_name ];
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}
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}
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}
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return $context;
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}
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/**
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* List of inner blocks (of this same class).
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*
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* Use `$block->inner_blocks` to access this.
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*
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* @since 5.6.0
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* @return WP_Block[]
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*/
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protected function get_inner_blocks() {
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if ( ! empty( $this->parsed_block['innerBlocks'] ) ) {
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$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[ $attribute_name ];
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}
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}
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}
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return new WP_Block_List(
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$this->parsed_block['innerBlocks'],
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$child_context,
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$this->registry
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);
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}
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return array();
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}
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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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* Use `$block->inner_html` to access this.
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*
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* @example "...Just <!-- wp:test /--> testing..." -> "Just testing..."
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*
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* @since 5.6.0
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* @return string
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*/
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protected function get_inner_html() {
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if ( ! empty( $this->parsed_block['innerHTML'] ) ) {
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return $this->parsed_block['innerHTML'];
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}
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return '';
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}
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/**
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* List of string fragments and null markers where inner blocks were found
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*
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* Use `$block->inner_content` to access this.
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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 5.6.0
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* @return array
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*/
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protected function get_inner_content() {
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if ( ! empty( $this->parsed_block['innerContent'] ) ) {
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return $this->parsed_block['innerContent'];
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}
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return array();
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}
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/**
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* Generates the render output for the block.
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*
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* @since 5.5.0
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*
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* @param array $options {
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* Optional options object.
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*
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* @type bool $dynamic Defaults to 'true'. Optionally set to false to avoid using the block's render_callback.
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* }
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* @return string Rendered block output.
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*/
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public function render( $options = array() ) {
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global $post;
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/** This filter is documented in wp-includes/blocks.php */
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$pre_render = apply_filters( 'pre_render_block', null, $this->parsed_block );
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if ( ! is_null( $pre_render ) ) {
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return $pre_render;
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}
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$options = wp_parse_args(
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$options,
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array(
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'dynamic' => true,
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)
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);
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$initial_parsed_block = $this->parsed_block;
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$initial_available_context = $this->available_context;
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$initial_cached_properties = $this->cached_properties;
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/**
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* Filters a block which is to be rendered by render_block() or
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* WP_Block::render().
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*
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* @since 5.1.0
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*
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* @param array $parsed_block The block being rendered.
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* @param array $source_block An un-modified copy of $parsed_block, as it appeared in the source content.
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*/
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$parsed_block = apply_filters(
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'render_block_data',
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$this->parsed_block,
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$initial_parsed_block
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);
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/**
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* Filters the default context of a block which is to be rendered by
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* render_block() or WP_Block::render().
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*
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* @since 5.5.0
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*
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* @param array $available_context Default context.
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* @param array $parsed_block Block being rendered, filtered by `render_block_data`.
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*/
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$available_context = apply_filters(
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'render_block_context',
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$this->available_context,
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$this->parsed_block
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);
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$this->reset( $parsed_block, $available_context );
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$is_dynamic = $options['dynamic']
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&& $this->name
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&& null !== $this->block_type
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&& $this->block_type->is_dynamic();
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$block_content = '';
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if ( ! $options['dynamic'] || empty( $this->block_type->skip_inner_blocks ) ) {
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$index = 0;
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foreach ( $this->inner_content as $chunk ) {
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$block_content .= is_string( $chunk ) ?
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$chunk :
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$this->inner_blocks[ $index++ ]->render();
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}
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}
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if ( $is_dynamic ) {
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$global_post = $post;
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$parent = WP_Block_Supports::$block_to_render;
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WP_Block_Supports::$block_to_render = $this->parsed_block;
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$block_content = (string) call_user_func(
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$this->block_type->render_callback,
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$this->attributes,
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$block_content,
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$this
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);
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WP_Block_Supports::$block_to_render = $parent;
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$post = $global_post;
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}
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if ( ! empty( $this->block_type->script ) ) {
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wp_enqueue_script( $this->block_type->script );
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}
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if ( ! empty( $this->block_type->style ) ) {
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wp_enqueue_style( $this->block_type->style );
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}
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/**
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* Filters the content of a single block.
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*
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* @since 5.0.0
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*
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* @param string $block_content The block content about to be appended.
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* @param array $block The full block, including name and attributes.
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*/
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$block_content = apply_filters( 'render_block', $block_content, $this->parsed_block );
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$this->reset(
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$initial_parsed_block,
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$initial_available_context,
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$initial_cached_properties
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);
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return $block_content;
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}
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}
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