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<?php
/**
* HTML API: WP_HTML_Processor_State class
*
* @package WordPress
* @subpackage HTML-API
* @since 6.4.0
*/
/**
* Core class used by the HTML processor during HTML parsing
* for managing the internal parsing state.
*
* This class is designed for internal use by the HTML processor.
*
* @since 6.4.0
*
* @access private
*
* @see WP_HTML_Processor
*/
class WP_HTML_Processor_State {
/*
* Insertion mode constants.
*
* These constants exist and are named to make it easier to
* discover and recognize the supported insertion modes in
* the parser.
*
* Out of all the possible insertion modes, only those
* supported by the parser are listed here. As support
* is added to the parser for more modes, add them here
* following the same naming and value pattern.
*
* @see https://html.spec.whatwg.org/#the-insertion-mode
*/
/**
* Initial insertion mode for full HTML parser.
*
* @since 6.4.0
*
* @see https://html.spec.whatwg.org/#the-initial-insertion-mode
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_INITIAL = 'insertion-mode-initial';
/**
* Before HTML insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#the-before-html-insertion-mode
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_BEFORE_HTML = 'insertion-mode-before-html';
/**
* Before head insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-beforehead
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_BEFORE_HEAD = 'insertion-mode-before-head';
/**
* In head insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-inhead
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_IN_HEAD = 'insertion-mode-in-head';
/**
* In head noscript insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-inheadnoscript
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_IN_HEAD_NOSCRIPT = 'insertion-mode-in-head-noscript';
/**
* After head insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-afterhead
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_AFTER_HEAD = 'insertion-mode-after-head';
/**
* In body insertion mode for full HTML parser.
*
* @since 6.4.0
*
* @see https://html.spec.whatwg.org/#parsing-main-inbody
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_IN_BODY = 'insertion-mode-in-body';
/**
* In table insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-intable
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_IN_TABLE = 'insertion-mode-in-table';
/**
* In table text insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-intabletext
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_IN_TABLE_TEXT = 'insertion-mode-in-table-text';
/**
* In caption insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-incaption
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_IN_CAPTION = 'insertion-mode-in-caption';
/**
* In column group insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-incolumngroup
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_IN_COLUMN_GROUP = 'insertion-mode-in-column-group';
/**
* In table body insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-intablebody
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_IN_TABLE_BODY = 'insertion-mode-in-table-body';
/**
* In row insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-inrow
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_IN_ROW = 'insertion-mode-in-row';
/**
* In cell insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-incell
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_IN_CELL = 'insertion-mode-in-cell';
/**
* In select insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-inselect
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_IN_SELECT = 'insertion-mode-in-select';
/**
* In select in table insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-inselectintable
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_IN_SELECT_IN_TABLE = 'insertion-mode-in-select-in-table';
/**
* In template insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-intemplate
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_IN_TEMPLATE = 'insertion-mode-in-template';
/**
* After body insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-afterbody
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_AFTER_BODY = 'insertion-mode-after-body';
/**
* In frameset insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-inframeset
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_IN_FRAMESET = 'insertion-mode-in-frameset';
/**
* After frameset insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#parsing-main-afterframeset
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_AFTER_FRAMESET = 'insertion-mode-after-frameset';
/**
* After after body insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#the-after-after-body-insertion-mode
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_AFTER_AFTER_BODY = 'insertion-mode-after-after-body';
/**
* After after frameset insertion mode for full HTML parser.
*
* @since 6.7.0
*
* @see https://html.spec.whatwg.org/#the-after-after-frameset-insertion-mode
* @see WP_HTML_Processor_State::$insertion_mode
*
* @var string
*/
const INSERTION_MODE_AFTER_AFTER_FRAMESET = 'insertion-mode-after-after-frameset';
/**
* 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<string>
*/
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;
/**
* 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;
/**
* The recognized encoding of the input byte stream.
*
* > The stream of code points that comprises the input to the tokenization
* > stage will be initially seen by the user agent as a stream of bytes
* > (typically coming over the network or from the local file system).
* > The bytes encode the actual characters according to a particular character
* > encoding, which the user agent uses to decode the bytes into characters.
*
* @since 6.7.0
*
* @var string|null
*/
public $encoding = null;
/**
* The parser's confidence in the input encoding.
*
* > When the HTML parser is decoding an input byte stream, it uses a character
* > encoding and a confidence. The confidence is either tentative, certain, or
* > irrelevant. The encoding used, and whether the confidence in that encoding
* > is tentative or certain, is used during the parsing to determine whether to
* > change the encoding. If no encoding is necessary, e.g. because the parser is
* > operating on a Unicode stream and doesn't have to use a character encoding
* > at all, then the confidence is irrelevant.
*
* @since 6.7.0
*
* @var string
*/
public $encoding_confidence = 'tentative';
/**
* 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();
}
}
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