WP_HTML_Processor::step( string $node_to_process = self::PROCESS_NEXT_NODE ): bool

983	public function step( $node_to_process = self::PROCESS_NEXT_NODE ): bool {984		// Refuse to proceed if there was a previous error.985		if ( null !== $this->last_error ) {986			return false;987		}988 989		if ( self::REPROCESS_CURRENT_NODE !== $node_to_process ) {990			/*991			 * Void elements still hop onto the stack of open elements even though992			 * there's no corresponding closing tag. This is important for managing993			 * stack-based operations such as "navigate to parent node" or checking994			 * on an element's breadcrumbs.995			 *996			 * When moving on to the next node, therefore, if the bottom-most element997			 * on the stack is a void element, it must be closed.998			 */999			$top_node = $this->state->stack_of_open_elements->current_node();1000			if ( isset( $top_node ) && ! $this->expects_closer( $top_node ) ) {1001				$this->state->stack_of_open_elements->pop();1002			}1003		}1004 1005		if ( self::PROCESS_NEXT_NODE === $node_to_process ) {1006			parent::next_token();1007			if ( WP_HTML_Tag_Processor::STATE_TEXT_NODE === $this->parser_state ) {1008				parent::subdivide_text_appropriately();1009			}1010		}1011 1012		// Finish stepping when there are no more tokens in the document.1013		if (1014			WP_HTML_Tag_Processor::STATE_INCOMPLETE_INPUT === $this->parser_state ||1015			WP_HTML_Tag_Processor::STATE_COMPLETE === $this->parser_state1016		) {1017			return false;1018		}1019 1020		$adjusted_current_node = $this->get_adjusted_current_node();1021		$is_closer             = $this->is_tag_closer();1022		$is_start_tag          = WP_HTML_Tag_Processor::STATE_MATCHED_TAG === $this->parser_state && ! $is_closer;1023		$token_name            = $this->get_token_name();1024 1025		if ( self::REPROCESS_CURRENT_NODE !== $node_to_process ) {1026			$this->state->current_token = new WP_HTML_Token(1027				$this->bookmark_token(),1028				$token_name,1029				$this->has_self_closing_flag(),1030				$this->release_internal_bookmark_on_destruct1031			);1032		}1033 1034		$parse_in_current_insertion_mode = (1035			0 === $this->state->stack_of_open_elements->count() ||1036			'html' === $adjusted_current_node->namespace ||1037			(1038				'math' === $adjusted_current_node->integration_node_type &&1039				(1040					( $is_start_tag && ! in_array( $token_name, array( 'MGLYPH', 'MALIGNMARK' ), true ) ) ||1041					'#text' === $token_name1042				)1043			) ||1044			(1045				'math' === $adjusted_current_node->namespace &&1046				'ANNOTATION-XML' === $adjusted_current_node->node_name &&1047				$is_start_tag && 'SVG' === $token_name1048			) ||1049			(1050				'html' === $adjusted_current_node->integration_node_type &&1051				( $is_start_tag || '#text' === $token_name )1052			)1053		);1054 1055		try {1056			if ( ! $parse_in_current_insertion_mode ) {1057				return $this->step_in_foreign_content();1058			}1059 1060			switch ( $this->state->insertion_mode ) {1061				case WP_HTML_Processor_State::INSERTION_MODE_INITIAL:1062					return $this->step_initial();