Steps through the HTML document and stop at the next tag, if any.
Description
See also
Parameters
$node_to_process
stringoptional- Whether to parse the next node or reprocess the current node.
Default:
self::PROCESS_NEXT_NODE
Source
public function step( $node_to_process = self::PROCESS_NEXT_NODE ) {
// Refuse to proceed if there was a previous error.
if ( null !== $this->last_error ) {
return false;
}
if ( self::REPROCESS_CURRENT_NODE !== $node_to_process ) {
/*
* Void elements still hop onto the stack of open elements even though
* there's no corresponding closing tag. This is important for managing
* stack-based operations such as "navigate to parent node" or checking
* on an element's breadcrumbs.
*
* When moving on to the next node, therefore, if the bottom-most element
* on the stack is a void element, it must be closed.
*
* @todo Once self-closing foreign elements and BGSOUND are supported,
* they must also be implicitly closed here too. BGSOUND is
* special since it's only self-closing if the self-closing flag
* is provided in the opening tag, otherwise it expects a tag closer.
*/
$top_node = $this->state->stack_of_open_elements->current_node();
if ( isset( $top_node ) && ! static::expects_closer( $top_node ) ) {
$this->state->stack_of_open_elements->pop();
}
}
if ( self::PROCESS_NEXT_NODE === $node_to_process ) {
parent::next_token();
}
// Finish stepping when there are no more tokens in the document.
if (
WP_HTML_Tag_Processor::STATE_INCOMPLETE_INPUT === $this->parser_state ||
WP_HTML_Tag_Processor::STATE_COMPLETE === $this->parser_state
) {
return false;
}
$this->state->current_token = new WP_HTML_Token(
$this->bookmark_token(),
$this->get_token_name(),
$this->has_self_closing_flag(),
$this->release_internal_bookmark_on_destruct
);
try {
switch ( $this->state->insertion_mode ) {
case WP_HTML_Processor_State::INSERTION_MODE_IN_BODY:
return $this->step_in_body();
default:
$this->last_error = self::ERROR_UNSUPPORTED;
throw new WP_HTML_Unsupported_Exception( "No support for parsing in the '{$this->state->insertion_mode}' state." );
}
} catch ( WP_HTML_Unsupported_Exception $e ) {
/*
* Exceptions are used in this class to escape deep call stacks that
* otherwise might involve messier calling and return conventions.
*/
return false;
}
}
Changelog
Version | Description |
---|---|
6.4.0 | Introduced. |
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