WP_HTML_Processor::reconstruct_active_formatting_elements(): bool

Source

private function reconstruct_active_formatting_elements() {
	/*
	 * > If there are no entries in the list of active formatting elements, then there is nothing
	 * > to reconstruct; stop this algorithm.
	 */
	if ( 0 === $this->state->active_formatting_elements->count() ) {
		return false;
	}

	$last_entry = $this->state->active_formatting_elements->current_node();
	if (

		/*
		 * > If the last (most recently added) entry in the list of active formatting elements is a marker;
		 * > stop this algorithm.
		 */
		'marker' === $last_entry->node_name ||

		/*
		 * > If the last (most recently added) entry in the list of active formatting elements is an
		 * > element that is in the stack of open elements, then there is nothing to reconstruct;
		 * > stop this algorithm.
		 */
		$this->state->stack_of_open_elements->contains_node( $last_entry )
	) {
		return false;
	}

	$this->last_error = self::ERROR_UNSUPPORTED;
	throw new WP_HTML_Unsupported_Exception( 'Cannot reconstruct active formatting elements when advancing and rewinding is required.' );
}

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