WP_HTML_Processor::step_after_head(): bool

Source

private function step_after_head(): bool {
	$token_name = $this->get_token_name();
	$token_type = $this->get_token_type();
	$is_closer  = parent::is_tag_closer();
	$op_sigil   = '#tag' === $token_type ? ( $is_closer ? '-' : '+' ) : '';
	$op         = "{$op_sigil}{$token_name}";

	switch ( $op ) {
		/*
		 * > A character token that is one of U+0009 CHARACTER TABULATION,
		 * > U+000A LINE FEED (LF), U+000C FORM FEED (FF),
		 * > U+000D CARRIAGE RETURN (CR), or U+0020 SPACE
		 */
		case '#text':
			if ( parent::TEXT_IS_WHITESPACE === $this->text_node_classification ) {
				// Insert the character.
				$this->insert_html_element( $this->state->current_token );
				return true;
			}
			goto after_head_anything_else;
			break;

		/*
		 * > A comment token
		 */
		case '#comment':
		case '#funky-comment':
		case '#presumptuous-tag':
			$this->insert_html_element( $this->state->current_token );
			return true;

		/*
		 * > A DOCTYPE token
		 */
		case 'html':
			// Parse error: ignore the token.
			return $this->step();

		/*
		 * > A start tag whose tag name is "html"
		 */
		case '+HTML':
			return $this->step_in_body();

		/*
		 * > A start tag whose tag name is "body"
		 */
		case '+BODY':
			$this->insert_html_element( $this->state->current_token );
			$this->state->frameset_ok    = false;
			$this->state->insertion_mode = WP_HTML_Processor_State::INSERTION_MODE_IN_BODY;
			return true;

		/*
		 * > A start tag whose tag name is "frameset"
		 */
		case '+FRAMESET':
			$this->insert_html_element( $this->state->current_token );
			$this->state->insertion_mode = WP_HTML_Processor_State::INSERTION_MODE_IN_FRAMESET;
			return true;

		/*
		 * > A start tag whose tag name is one of: "base", "basefont", "bgsound",
		 * > "link", "meta", "noframes", "script", "style", "template", "title"
		 *
		 * Anything here is a parse error.
		 */
		case '+BASE':
		case '+BASEFONT':
		case '+BGSOUND':
		case '+LINK':
		case '+META':
		case '+NOFRAMES':
		case '+SCRIPT':
		case '+STYLE':
		case '+TEMPLATE':
		case '+TITLE':
			/*
			 * > Push the node pointed to by the head element pointer onto the stack of open elements.
			 * > Process the token using the rules for the "in head" insertion mode.
			 * > Remove the node pointed to by the head element pointer from the stack of open elements. (It might not be the current node at this point.)
			 */
			$this->bail( 'Cannot process elements after HEAD which reopen the HEAD element.' );
			/*
			 * Do not leave this break in when adding support; it's here to prevent
			 * WPCS from getting confused at the switch structure without a return,
			 * because it doesn't know that `bail()` always throws.
			 */
			break;

		/*
		 * > An end tag whose tag name is "template"
		 */
		case '-TEMPLATE':
			return $this->step_in_head();

		/*
		 * > An end tag whose tag name is one of: "body", "html", "br"
		 *
		 * Closing BR tags are always reported by the Tag Processor as opening tags.
		 */
		case '-BODY':
		case '-HTML':
			/*
			 * > Act as described in the "anything else" entry below.
			 */
			goto after_head_anything_else;
			break;
	}

	/*
	 * > A start tag whose tag name is "head"
	 * > Any other end tag
	 */
	if ( '+HEAD' === $op || $is_closer ) {
		// Parse error: ignore the token.
		return $this->step();
	}

	/*
	 * > Anything else
	 * > Insert an HTML element for a "body" start tag token with no attributes.
	 */
	after_head_anything_else:
	$this->insert_virtual_node( 'BODY' );
	$this->state->insertion_mode = WP_HTML_Processor_State::INSERTION_MODE_IN_BODY;
	return $this->step( self::REPROCESS_CURRENT_NODE );
}

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