In no-quirks mode, the behavior is (hopefully) the desired behavior
* > described by the modern HTML and CSS specifications.
*
* @since 6.7.0
*
* @var string
*/
const NO_QUIRKS_MODE = 'no-quirks-mode';
/**
* Quirks mode document compatability mode.
*
* > In quirks mode, layout emulates behavior in Navigator 4 and Internet
* > Explorer 5. This is essential in order to support websites that were
* > built before the widespread adoption of web standards.
*
* @since 6.7.0
*
* @var string
*/
const QUIRKS_MODE = 'quirks-mode';
/**
* The stack of template insertion modes.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#the-insertion-mode:stack-of-template-insertion-modes
*
* @var array
*/
public $stack_of_template_insertion_modes = array();
/**
* Tracks open elements while scanning HTML.
*
* This property is initialized in the constructor and never null.
*
* @since 6.4.0
*
* @see https://html.spec.whatwg.org/#stack-of-open-elements
*
* @var WP_HTML_Open_Elements
*/
public $stack_of_open_elements;
/**
* Tracks open formatting elements, used to handle mis-nested formatting element tags.
*
* This property is initialized in the constructor and never null.
*
* @since 6.4.0
*
* @see https://html.spec.whatwg.org/#list-of-active-formatting-elements
*
* @var WP_HTML_Active_Formatting_Elements
*/
public $active_formatting_elements;
/**
* Refers to the currently-matched tag, if any.
*
* @since 6.4.0
*
* @var WP_HTML_Token|null
*/
public $current_token = null;
/**
* Tree construction insertion mode.
*
* @since 6.4.0
*
* @see https://html.spec.whatwg.org/#insertion-mode
*
* @var string
*/
public $insertion_mode = self::INSERTION_MODE_INITIAL;
/**
* Indicates if the document is in quirks mode or no-quirks mode.
*
* Impact on HTML parsing:
*
* - In `NO_QUIRKS_MODE` CSS class and ID selectors match in a byte-for-byte
* manner, otherwise for backwards compatability, class selectors are to
* match in an ASCII case-insensitive manner.
*
* - When not in `QUIRKS_MODE`, a TABLE start tag implicitly closes an open P tag
* if one is in scope and open, otherwise the TABLE becomes a child of the P.
*
* `QUIRKS_MODE` impacts many styling-related aspects of an HTML document, but
* none of the other changes modifies how the HTML is parsed or selected.
*
* @see self::QUIRKS_MODE
* @see self::NO_QUIRKS_MODE
*
* @since 6.7.0
*
* @var string
*/
public $document_mode = self::NO_QUIRKS_MODE;
/**
* Context node initializing fragment parser, if created as a fragment parser.
*
* @since 6.4.0
*
* @see https://html.spec.whatwg.org/#concept-frag-parse-context
*
* @var [string, array]|null
*/
public $context_node = null;
/**
* HEAD element pointer.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/multipage/parsing.html#head-element-pointer
*
* @var WP_HTML_Token|null
*/
public $head_element = null;
/**
* FORM element pointer.
*
* > points to the last form element that was opened and whose end tag has
* > not yet been seen. It is used to make form controls associate with
* > forms in the face of dramatically bad markup, for historical reasons.
* > It is ignored inside template elements.
*
* @todo This may be invalidated by a seek operation.
*
* @see https://html.spec.whatwg.org/#form-element-pointer
*
* @since 6.7.0
*
* @var WP_HTML_Token|null
*/
public $form_element = null;
/**
* The frameset-ok flag indicates if a `FRAMESET` element is allowed in the current state.
*
* > The frameset-ok flag is set to "ok" when the parser is created. It is set to "not ok" after certain tokens are seen.
*
* @since 6.4.0
*
* @see https://html.spec.whatwg.org/#frameset-ok-flag
*
* @var bool
*/
public $frameset_ok = true;
/**
* Constructor - creates a new and empty state value.
*
* @since 6.4.0
*
* @see WP_HTML_Processor
*/
public function __construct() {
$this->stack_of_open_elements = new WP_HTML_Open_Elements();
$this->active_formatting_elements = new WP_HTML_Active_Formatting_Elements();
}
}