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d0d8ba24d8
The HTML API has been behaving as if CSS class name selectors matched class names in an ASCII case-insensitive manner. This is only true if the document in question is set to quirks mode. Unfortunately most documents processed will be set to no-quirks mode, meaning that some CSS behaviors have been matching incorrectly when provided with case variants of class names. In this patch, the CSS methods have been audited and updated to adhere to the rules governing ASCII case sensitivity when matching classes. This includes `add_class()`, `remove_class()`, `has_class()`, and `class_list()`. Now, it is assumed that a document is in no-quirks mode unless a full HTML parser infers quirks mode, and these methods will treat class names in a byte-for-byte manner. Otherwise, when a document is in quirks mode, the methods will compare the provided class names against existing class names for the tag in an ASCII case insensitive way, while `class_list()` will return a lower-cased version of the existing class names. The lower-casing in `class_list()` is performed for consistency, since it's possible that multiple case variants of the same comparable class name exists on a tag in the input HTML. Developed in https://github.com/WordPress/wordpress-develop/pull/7169 Discussed in https://core.trac.wordpress.org/ticket/61531 Props dmsnell, jonsurrell. See #61531. Built from https://develop.svn.wordpress.org/trunk@58985 git-svn-id: http://core.svn.wordpress.org/trunk@58381 1a063a9b-81f0-0310-95a4-ce76da25c4cd
456 lines
11 KiB
PHP
456 lines
11 KiB
PHP
<?php
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/**
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* HTML API: WP_HTML_Processor_State class
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*
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* @package WordPress
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* @subpackage HTML-API
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* @since 6.4.0
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*/
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/**
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* Core class used by the HTML processor during HTML parsing
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* for managing the internal parsing state.
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*
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* This class is designed for internal use by the HTML processor.
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*
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* @since 6.4.0
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*
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* @access private
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*
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* @see WP_HTML_Processor
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*/
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class WP_HTML_Processor_State {
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/*
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* Insertion mode constants.
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*
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* These constants exist and are named to make it easier to
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* discover and recognize the supported insertion modes in
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* the parser.
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*
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* Out of all the possible insertion modes, only those
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* supported by the parser are listed here. As support
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* is added to the parser for more modes, add them here
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* following the same naming and value pattern.
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*
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* @see https://html.spec.whatwg.org/#the-insertion-mode
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*/
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/**
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* Initial insertion mode for full HTML parser.
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*
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* @since 6.4.0
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*
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* @see https://html.spec.whatwg.org/#the-initial-insertion-mode
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_INITIAL = 'insertion-mode-initial';
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/**
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* Before HTML insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#the-before-html-insertion-mode
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_BEFORE_HTML = 'insertion-mode-before-html';
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/**
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* Before head insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-beforehead
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_BEFORE_HEAD = 'insertion-mode-before-head';
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/**
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* In head insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-inhead
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_IN_HEAD = 'insertion-mode-in-head';
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/**
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* In head noscript insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-inheadnoscript
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_IN_HEAD_NOSCRIPT = 'insertion-mode-in-head-noscript';
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/**
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* After head insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-afterhead
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_AFTER_HEAD = 'insertion-mode-after-head';
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/**
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* In body insertion mode for full HTML parser.
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*
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* @since 6.4.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-inbody
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_IN_BODY = 'insertion-mode-in-body';
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/**
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* In table insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-intable
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_IN_TABLE = 'insertion-mode-in-table';
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/**
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* In table text insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-intabletext
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_IN_TABLE_TEXT = 'insertion-mode-in-table-text';
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/**
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* In caption insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-incaption
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_IN_CAPTION = 'insertion-mode-in-caption';
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/**
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* In column group insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-incolumngroup
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_IN_COLUMN_GROUP = 'insertion-mode-in-column-group';
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/**
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* In table body insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-intablebody
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_IN_TABLE_BODY = 'insertion-mode-in-table-body';
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/**
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* In row insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-inrow
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_IN_ROW = 'insertion-mode-in-row';
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/**
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* In cell insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-incell
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_IN_CELL = 'insertion-mode-in-cell';
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/**
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* In select insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-inselect
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_IN_SELECT = 'insertion-mode-in-select';
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/**
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* In select in table insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-inselectintable
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_IN_SELECT_IN_TABLE = 'insertion-mode-in-select-in-table';
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/**
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* In template insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-intemplate
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_IN_TEMPLATE = 'insertion-mode-in-template';
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/**
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* After body insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-afterbody
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_AFTER_BODY = 'insertion-mode-after-body';
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/**
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* In frameset insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-inframeset
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_IN_FRAMESET = 'insertion-mode-in-frameset';
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/**
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* After frameset insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#parsing-main-afterframeset
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_AFTER_FRAMESET = 'insertion-mode-after-frameset';
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/**
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* After after body insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#the-after-after-body-insertion-mode
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_AFTER_AFTER_BODY = 'insertion-mode-after-after-body';
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/**
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* After after frameset insertion mode for full HTML parser.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#the-after-after-frameset-insertion-mode
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* @see WP_HTML_Processor_State::$insertion_mode
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*
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* @var string
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*/
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const INSERTION_MODE_AFTER_AFTER_FRAMESET = 'insertion-mode-after-after-frameset';
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/**
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* The stack of template insertion modes.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/#the-insertion-mode:stack-of-template-insertion-modes
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*
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* @var array<string>
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*/
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public $stack_of_template_insertion_modes = array();
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/**
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* Tracks open elements while scanning HTML.
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*
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* This property is initialized in the constructor and never null.
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*
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* @since 6.4.0
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*
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* @see https://html.spec.whatwg.org/#stack-of-open-elements
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*
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* @var WP_HTML_Open_Elements
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*/
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public $stack_of_open_elements;
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/**
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* Tracks open formatting elements, used to handle mis-nested formatting element tags.
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*
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* This property is initialized in the constructor and never null.
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*
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* @since 6.4.0
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*
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* @see https://html.spec.whatwg.org/#list-of-active-formatting-elements
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*
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* @var WP_HTML_Active_Formatting_Elements
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*/
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public $active_formatting_elements;
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/**
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* Refers to the currently-matched tag, if any.
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*
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* @since 6.4.0
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*
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* @var WP_HTML_Token|null
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*/
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public $current_token = null;
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/**
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* Tree construction insertion mode.
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*
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* @since 6.4.0
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*
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* @see https://html.spec.whatwg.org/#insertion-mode
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*
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* @var string
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*/
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public $insertion_mode = self::INSERTION_MODE_INITIAL;
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/**
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* Context node initializing fragment parser, if created as a fragment parser.
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*
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* @since 6.4.0
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*
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* @see https://html.spec.whatwg.org/#concept-frag-parse-context
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*
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* @var [string, array]|null
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*/
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public $context_node = null;
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/**
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* The recognized encoding of the input byte stream.
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*
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* > The stream of code points that comprises the input to the tokenization
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* > stage will be initially seen by the user agent as a stream of bytes
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* > (typically coming over the network or from the local file system).
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* > The bytes encode the actual characters according to a particular character
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* > encoding, which the user agent uses to decode the bytes into characters.
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*
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* @since 6.7.0
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*
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* @var string|null
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*/
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public $encoding = null;
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/**
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* The parser's confidence in the input encoding.
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*
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* > When the HTML parser is decoding an input byte stream, it uses a character
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* > encoding and a confidence. The confidence is either tentative, certain, or
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* > irrelevant. The encoding used, and whether the confidence in that encoding
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* > is tentative or certain, is used during the parsing to determine whether to
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* > change the encoding. If no encoding is necessary, e.g. because the parser is
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* > operating on a Unicode stream and doesn't have to use a character encoding
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* > at all, then the confidence is irrelevant.
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*
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* @since 6.7.0
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*
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* @var string
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*/
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public $encoding_confidence = 'tentative';
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/**
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* HEAD element pointer.
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*
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* @since 6.7.0
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*
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* @see https://html.spec.whatwg.org/multipage/parsing.html#head-element-pointer
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*
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* @var WP_HTML_Token|null
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*/
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public $head_element = null;
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/**
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* FORM element pointer.
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*
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* > points to the last form element that was opened and whose end tag has
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* > not yet been seen. It is used to make form controls associate with
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* > forms in the face of dramatically bad markup, for historical reasons.
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* > It is ignored inside template elements.
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*
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* @todo This may be invalidated by a seek operation.
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*
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* @see https://html.spec.whatwg.org/#form-element-pointer
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*
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* @since 6.7.0
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*
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* @var WP_HTML_Token|null
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*/
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public $form_element = null;
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/**
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* The frameset-ok flag indicates if a `FRAMESET` element is allowed in the current state.
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*
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* > The frameset-ok flag is set to "ok" when the parser is created. It is set to "not ok" after certain tokens are seen.
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*
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* @since 6.4.0
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*
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* @see https://html.spec.whatwg.org/#frameset-ok-flag
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*
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* @var bool
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*/
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public $frameset_ok = true;
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/**
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* Constructor - creates a new and empty state value.
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*
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* @since 6.4.0
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*
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* @see WP_HTML_Processor
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*/
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public function __construct() {
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$this->stack_of_open_elements = new WP_HTML_Open_Elements();
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$this->active_formatting_elements = new WP_HTML_Active_Formatting_Elements();
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}
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}
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