WP_Block::get_block_bindings_processor( string $block_content )

438	private static function get_block_bindings_processor( string $block_content ) {439		$internal_processor_class = new class('', WP_HTML_Processor::CONSTRUCTOR_UNLOCK_CODE) extends WP_HTML_Processor {440			/**441			 * Replace the rich text content between a tag opener and matching closer.442			 *443			 * When stopped on a tag opener, replace the content enclosed by it and its444			 * matching closer with the provided rich text.445			 *446			 * If byte offsets of inner blocks' rendered output are provided, the447			 * replacement stops at the first inner block found inside the element,448			 * preserving any markup produced by nested inner blocks (e.g. a List449			 * block nested inside a List Item).450			 *451			 * @param string $rich_text           The rich text to replace the original content with.452			 * @param int[]  $inner_block_offsets Optional. Byte offsets in the source HTML where453			 *                                    inner blocks' rendered output begins. Default empty array.454			 * @return bool True on success.455			 */456			public function replace_rich_text( $rich_text, $inner_block_offsets = array() ) {457				if ( $this->is_tag_closer() || ! $this->expects_closer() ) {458					return false;459				}460 461				$depth    = $this->get_current_depth();462				$tag_name = $this->get_tag();463 464				$this->set_bookmark( '_wp_block_bindings' );465				// The bookmark names are prefixed with `_` so the key below has an extra `_`.466				$tag_opener = $this->bookmarks['__wp_block_bindings'];467				$start      = $tag_opener->start + $tag_opener->length;468 469				// Find matching tag closer.470				while ( $this->next_token() && $this->get_current_depth() >= $depth ) {471				}472 473				if ( ! $this->is_tag_closer() || $tag_name !== $this->get_tag() ) {474					return false;475				}476 477				$this->set_bookmark( '_wp_block_bindings' );478				$tag_closer = $this->bookmarks['__wp_block_bindings'];479				$end        = $tag_closer->start;480 481				/*482				 * Stop at the first inner block that renders inside this element so483				 * its markup is preserved. The block's own rich text always precedes484				 * its inner blocks, so replacing up to the first inner block offset485				 * replaces only that rich text. Offsets are recorded during render in486				 * the same byte coordinates as this fragment, and are in ascending487				 * order, so the first match is the earliest inner block.488				 *489				 * The lower bound is inclusive of `$start`: when an inner block490				 * begins immediately, with no leading rich text, the (empty) rich491				 * text is still replaced instead of the inner block markup.492				 */493				foreach ( $inner_block_offsets as $inner_block_offset ) {494					if ( $inner_block_offset >= $start && $inner_block_offset < $end ) {495						$end = $inner_block_offset;496						break;497					}498				}499 500				$this->lexical_updates[] = new WP_HTML_Text_Replacement(501					$start,502					$end - $start,503					$rich_text504				);505 506				return true;507			}508		};509 510		return $internal_processor_class::create_fragment( $block_content );511	}