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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ`. * * > DOCTYPEs are required for legacy reasons. When omitted, browsers tend to use a different * > rendering mode that is incompatible with some specifications. Including the DOCTYPE in a * > document ensures that the browser makes a best-effort attempt at following the * > relevant specifications. * * @see https://html.spec.whatwg.org/#the-doctype * * DOCTYPE declarations comprise four properties: a name, public identifier, system identifier, * and an indication of which document compatibility mode they would imply if an HTML parser * hadn't already determined it from other information. * * @see https://html.spec.whatwg.org/#the-initial-insertion-mode * * Historically, the DOCTYPE declaration was used in SGML documents to instruct a parser how * to interpret the various tags and entities within a document. Its role in HTML diverged * from how it was used in SGML and no meaning should be back-read into HTML based on how it * is used in SGML, XML, or XHTML documents. * * @see https://www.iso.org/standard/16387.html * * @since 6.7.0 * * @access private * * @see WP_HTML_Processor */ class WP_HTML_Doctype_Info { /** * Name of the DOCTYPE: should be "html" for HTML documents. * * This value should be considered "read only" and not modified. * * Historically the DOCTYPE name indicates name of the document's root element. * * * ╰──┴── name is "html". * * @see https://html.spec.whatwg.org/#tokenization * * @since 6.7.0 * * @var string|null */ public $name = null; /** * Public identifier of the DOCTYPE. * * This value should be considered "read only" and not modified. * * The public identifier is optional and should not appear in HTML documents. * A `null` value indicates that no public identifier was present in the DOCTYPE. * * Historically the presence of the public identifier indicated that a document * was meant to be shared between computer systems and the value indicated to a * knowledgeable parser how to find the relevant document type definition (DTD). * * * │ │ ╰─── public identifier ─────╯ * ╰──┴── name is "html". * * @see https://html.spec.whatwg.org/#tokenization * * @since 6.7.0 * * @var string|null */ public $public_identifier = null; /** * System identifier of the DOCTYPE. * * This value should be considered "read only" and not modified. * * The system identifier is optional and should not appear in HTML documents. * A `null` value indicates that no system identifier was present in the DOCTYPE. * * Historically the system identifier specified where a relevant document type * declaration for the given document is stored and may be retrieved. * * * │ │ ╰──── system identifier ────╯ * ╰──┴── name is "html". * * If a public identifier were provided it would indicate to a knowledgeable * parser how to interpret the system identifier. * * * │ │ ╰─── public identifier ─────╯ ╰──── system identifier ────╯ * ╰──┴── name is "html". * * @see https://html.spec.whatwg.org/#tokenization * * @since 6.7.0 * * @var string|null */ public $system_identifier = null; /** * Which document compatibility mode this DOCTYPE declaration indicates. * * This value should be considered "read only" and not modified. * * When an HTML parser has not already set the document compatibility mode, * (e.g. "quirks" or "no-quirks" mode), it will be inferred from the properties * of the appropriate DOCTYPE declaration, if one exists. The DOCTYPE can * indicate one of three possible document compatibility modes: * * - "no-quirks" and "limited-quirks" modes (also called "standards" mode). * - "quirks" mode (also called `CSS1Compat` mode). * * An appropriate DOCTYPE is one encountered in the "initial" insertion mode, * before the HTML element has been opened and before finding any other * DOCTYPE declaration tokens. * * @see https://html.spec.whatwg.org/#the-initial-insertion-mode * * @since 6.7.0 * * @var string One of "no-quirks", "limited-quirks", or "quirks". */ public $indicated_compatibility_mode; /** * Constructor. * * This class should not be instantiated directly. * Use the static {@see self::from_doctype_token} method instead. * * The arguments to this constructor correspond to the "DOCTYPE token" * as defined in the HTML specification. * * > DOCTYPE tokens have a name, a public identifier, a system identifier, * > and a force-quirks flag. When a DOCTYPE token is created, its name, public identifier, * > and system identifier must be marked as missing (which is a distinct state from the * > empty string), and the force-quirks flag must be set to off (its other state is on). * * @see https://html.spec.whatwg.org/multipage/parsing.html#tokenization * * @since 6.7.0 * * @param string|null $name Name of the DOCTYPE. * @param string|null $public_identifier Public identifier of the DOCTYPE. * @param string|null $system_identifier System identifier of the DOCTYPE. * @param bool $force_quirks_flag Whether the force-quirks flag is set for the token. */ private function __construct( ?string $name, ?string $public_identifier, ?string $system_identifier, bool $force_quirks_flag ) { $this->name = $name; $this->public_identifier = $public_identifier; $this->system_identifier = $system_identifier; /* * > If the DOCTYPE token matches one of the conditions in the following list, * > then set the Document to quirks mode: */ /* * > The force-quirks flag is set to on. */ if ( $force_quirks_flag ) { $this->indicated_compatibility_mode = 'quirks'; return; } /* * Normative documents will contain the literal `` with no * public or system identifiers; short-circuit to avoid extra parsing. */ if ( 'html' === $name && null === $public_identifier && null === $system_identifier ) { $this->indicated_compatibility_mode = 'no-quirks'; return; } /* * > The name is not "html". * * The tokenizer must report the name in lower case even if provided in * the document in upper case; thus no conversion is required here. */ if ( 'html' !== $name ) { $this->indicated_compatibility_mode = 'quirks'; return; } /* * Set up some variables to handle the rest of the conditions. * * > set...the public identifier...to...the empty string if the public identifier was missing. * > set...the system identifier...to...the empty string if the system identifier was missing. * > * > The system identifier and public identifier strings must be compared... * > in an ASCII case-insensitive manner. * > * > A system identifier whose value is the empty string is not considered missing * > for the purposes of the conditions above. */ $system_identifier_is_missing = null === $system_identifier; $public_identifier = null === $public_identifier ? '' : strtolower( $public_identifier ); $system_identifier = null === $system_identifier ? '' : strtolower( $system_identifier ); /* * > The public identifier is set to… */ if ( '-//w3o//dtd w3 html strict 3.0//en//' === $public_identifier || '-/w3c/dtd html 4.0 transitional/en' === $public_identifier || 'html' === $public_identifier ) { $this->indicated_compatibility_mode = 'quirks'; return; } /* * > The system identifier is set to… */ if ( 'http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd' === $system_identifier ) { $this->indicated_compatibility_mode = 'quirks'; return; } /* * All of the following conditions depend on matching the public identifier. * If the public identifier is empty, none of the following conditions will match. */ if ( '' === $public_identifier ) { $this->indicated_compatibility_mode = 'no-quirks'; return; } /* * > The public identifier starts with… * * @todo Optimize this matching. It shouldn't be a large overall performance issue, * however, as only a single DOCTYPE declaration token should ever be parsed, * and normative documents will have exited before reaching this condition. */ if ( str_starts_with( $public_identifier, '+//silmaril//dtd html pro v0r11 19970101//' ) || str_starts_with( $public_identifier, '-//as//dtd html 3.0 aswedit + extensions//' ) || str_starts_with( $public_identifier, '-//advasoft ltd//dtd html 3.0 aswedit + extensions//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html 2.0 level 1//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html 2.0 level 2//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html 2.0 strict level 1//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html 2.0 strict level 2//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html 2.0 strict//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html 2.0//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html 2.1e//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html 3.0//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html 3.2 final//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html 3.2//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html 3//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html level 0//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html level 1//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html level 2//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html level 3//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html strict level 0//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html strict level 1//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html strict level 2//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html strict level 3//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html strict//' ) || str_starts_with( $public_identifier, '-//ietf//dtd html//' ) || str_starts_with( $public_identifier, '-//metrius//dtd metrius presentational//' ) || str_starts_with( $public_identifier, '-//microsoft//dtd internet explorer 2.0 html strict//' ) || str_starts_with( $public_identifier, '-//microsoft//dtd internet explorer 2.0 html//' ) || str_starts_with( $public_identifier, '-//microsoft//dtd internet explorer 2.0 tables//' ) || str_starts_with( $public_identifier, '-//microsoft//dtd internet explorer 3.0 html strict//' ) || str_starts_with( $public_identifier, '-//microsoft//dtd internet explorer 3.0 html//' ) || str_starts_with( $public_identifier, '-//microsoft//dtd internet explorer 3.0 tables//' ) || str_starts_with( $public_identifier, '-//netscape comm. corp.//dtd html//' ) || str_starts_with( $public_identifier, '-//netscape comm. corp.//dtd strict html//' ) || str_starts_with( $public_identifier, "-//o'reilly and associates//dtd html 2.0//" ) || str_starts_with( $public_identifier, "-//o'reilly and associates//dtd html extended 1.0//" ) || str_starts_with( $public_identifier, "-//o'reilly and associates//dtd html extended relaxed 1.0//" ) || str_starts_with( $public_identifier, '-//sq//dtd html 2.0 hotmetal + extensions//' ) || str_starts_with( $public_identifier, '-//softquad software//dtd hotmetal pro 6.0::19990601::extensions to html 4.0//' ) || str_starts_with( $public_identifier, '-//softquad//dtd hotmetal pro 4.0::19971010::extensions to html 4.0//' ) || str_starts_with( $public_identifier, '-//spyglass//dtd html 2.0 extended//' ) || str_starts_with( $public_identifier, '-//sun microsystems corp.//dtd hotjava html//' ) || str_starts_with( $public_identifier, '-//sun microsystems corp.//dtd hotjava strict html//' ) || str_starts_with( $public_identifier, '-//w3c//dtd html 3 1995-03-24//' ) || str_starts_with( $public_identifier, '-//w3c//dtd html 3.2 draft//' ) || str_starts_with( $public_identifier, '-//w3c//dtd html 3.2 final//' ) || str_starts_with( $public_identifier, '-//w3c//dtd html 3.2//' ) || str_starts_with( $public_identifier, '-//w3c//dtd html 3.2s draft//' ) || str_starts_with( $public_identifier, '-//w3c//dtd html 4.0 frameset//' ) || str_starts_with( $public_identifier, '-//w3c//dtd html 4.0 transitional//' ) || str_starts_with( $public_identifier, '-//w3c//dtd html experimental 19960712//' ) || str_starts_with( $public_identifier, '-//w3c//dtd html experimental 970421//' ) || str_starts_with( $public_identifier, '-//w3c//dtd w3 html//' ) || str_starts_with( $public_identifier, '-//w3o//dtd w3 html 3.0//' ) || str_starts_with( $public_identifier, '-//webtechs//dtd mozilla html 2.0//' ) || str_starts_with( $public_identifier, '-//webtechs//dtd mozilla html//' ) ) { $this->indicated_compatibility_mode = 'quirks'; return; } /* * > The system identifier is missing and the public identifier starts with… */ if ( $system_identifier_is_missing && ( str_starts_with( $public_identifier, '-//w3c//dtd html 4.01 frameset//' ) || str_starts_with( $public_identifier, '-//w3c//dtd html 4.01 transitional//' ) ) ) { $this->indicated_compatibility_mode = 'quirks'; return; } /* * > Otherwise, if the DOCTYPE token matches one of the conditions in * > the following list, then set the Document to limited-quirks mode. */ /* * > The public identifier starts with… */ if ( str_starts_with( $public_identifier, '-//w3c//dtd xhtml 1.0 frameset//' ) || str_starts_with( $public_identifier, '-//w3c//dtd xhtml 1.0 transitional//' ) ) { $this->indicated_compatibility_mode = 'limited-quirks'; return; } /* * > The system identifier is not missing and the public identifier starts with… */ if ( ! $system_identifier_is_missing && ( str_starts_with( $public_identifier, '-//w3c//dtd html 4.01 frameset//' ) || str_starts_with( $public_identifier, '-//w3c//dtd html 4.01 transitional//' ) ) ) { $this->indicated_compatibility_mode = 'limited-quirks'; return; } $this->indicated_compatibility_mode = 'no-quirks'; } /** * Creates a WP_HTML_Doctype_Info instance by parsing a raw DOCTYPE declaration token. * * Use this method to parse a DOCTYPE declaration token and get access to its properties * via the returned WP_HTML_Doctype_Info class instance. The provided input must parse * properly as a DOCTYPE declaration, though it must not represent a valid DOCTYPE. * * Example: * * // Normative HTML DOCTYPE declaration. * $doctype = WP_HTML_Doctype_Info::from_doctype_token( '' ); * 'no-quirks' === $doctype->indicated_compatibility_mode; * * // A nonsensical DOCTYPE is still valid, and will indicate "quirks" mode. * $doctype = WP_HTML_Doctype_Info::from_doctype_token( '' ); * 'quirks' === $doctype->indicated_compatibility_mode; * * // Textual quirks present in raw HTML are handled appropriately. * $doctype = WP_HTML_Doctype_Info::from_doctype_token( "" ); * 'no-quirks' === $doctype->indicated_compatibility_mode; * * // Anything other than a proper DOCTYPE declaration token fails to parse. * null === WP_HTML_Doctype_Info::from_doctype_token( ' ' ); * null === WP_HTML_Doctype_Info::from_doctype_token( '

' ); * null === WP_HTML_Doctype_Info::from_doctype_token( '' ); * null === WP_HTML_Doctype_Info::from_doctype_token( 'html' ); * null === WP_HTML_Doctype_Info::from_doctype_token( '' ); * * @since 6.7.0 * * @param string $doctype_html The complete raw DOCTYPE HTML string, e.g. ``. * * @return WP_HTML_Doctype_Info|null A WP_HTML_Doctype_Info instance will be returned if the * provided DOCTYPE HTML is a valid DOCTYPE. Otherwise, null. */ public static function from_doctype_token( string $doctype_html ): ?self { $doctype_name = null; $doctype_public_id = null; $doctype_system_id = null; $end = strlen( $doctype_html ) - 1; /* * This parser combines the rules for parsing DOCTYPE tokens found in the HTML * specification for the DOCTYPE related tokenizer states. * * @see https://html.spec.whatwg.org/#doctype-state */ /* * - Valid DOCTYPE HTML token must be at least `` assuming a complete token not * ending in end-of-file. * - It must start with an ASCII case-insensitive match for `` must be the final byte in the HTML string. */ if ( $end < 9 || 0 !== substr_compare( $doctype_html, '`? if ( '>' !== $doctype_html[ $end ] || ( strcspn( $doctype_html, '>', $at ) + $at ) < $end ) { return null; } /* * Perform newline normalization and ensure the $end value is correct after normalization. * * @see https://html.spec.whatwg.org/#preprocessing-the-input-stream * @see https://infra.spec.whatwg.org/#normalize-newlines */ $doctype_html = str_replace( "\r\n", "\n", $doctype_html ); $doctype_html = str_replace( "\r", "\n", $doctype_html ); $end = strlen( $doctype_html ) - 1; /* * In this state, the doctype token has been found and its "content" optionally including the * name, public identifier, and system identifier is between the current position and the end. * * "" * ╰─ $at ╰─ $end * * It's also possible that the declaration part is empty. * * ╭─ $at * "" * ╰─ $end * * Rules for parsing ">" which terminates the DOCTYPE do not need to be considered as they * have been handled above in the condition that the provided DOCTYPE HTML must contain * exactly one ">" character in the final position. */ /* * * Parsing effectively begins in "Before DOCTYPE name state". Ignore whitespace and * proceed to the next state. * * @see https://html.spec.whatwg.org/#before-doctype-name-state */ $at += strspn( $doctype_html, " \t\n\f\r", $at ); if ( $at >= $end ) { return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true ); } $name_length = strcspn( $doctype_html, " \t\n\f\r", $at, $end - $at ); $doctype_name = str_replace( "\0", "\u{FFFD}", strtolower( substr( $doctype_html, $at, $name_length ) ) ); $at += $name_length; $at += strspn( $doctype_html, " \t\n\f\r", $at, $end - $at ); if ( $at >= $end ) { return new self( $doctype_name, $doctype_public_id, $doctype_system_id, false ); } /* * "After DOCTYPE name state" * * Find a case-insensitive match for "PUBLIC" or "SYSTEM" at this point. * Otherwise, set force-quirks and enter bogus DOCTYPE state (skip the rest of the doctype). * * @see https://html.spec.whatwg.org/#after-doctype-name-state */ if ( $at + 6 >= $end ) { return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true ); } /* * > If the six characters starting from the current input character are an ASCII * > case-insensitive match for the word "PUBLIC", then consume those characters * > and switch to the after DOCTYPE public keyword state. */ if ( 0 === substr_compare( $doctype_html, 'PUBLIC', $at, 6, true ) ) { $at += 6; $at += strspn( $doctype_html, " \t\n\f\r", $at, $end - $at ); if ( $at >= $end ) { return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true ); } goto parse_doctype_public_identifier; } /* * > Otherwise, if the six characters starting from the current input character are an ASCII * > case-insensitive match for the word "SYSTEM", then consume those characters and switch * > to the after DOCTYPE system keyword state. */ if ( 0 === substr_compare( $doctype_html, 'SYSTEM', $at, 6, true ) ) { $at += 6; $at += strspn( $doctype_html, " \t\n\f\r", $at, $end - $at ); if ( $at >= $end ) { return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true ); } goto parse_doctype_system_identifier; } /* * > Otherwise, this is an invalid-character-sequence-after-doctype-name parse error. * > Set the current DOCTYPE token's force-quirks flag to on. Reconsume in the bogus * > DOCTYPE state. */ return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true ); parse_doctype_public_identifier: /* * The parser should enter "DOCTYPE public identifier (double-quoted) state" or * "DOCTYPE public identifier (single-quoted) state" by finding one of the valid quotes. * Anything else forces quirks mode and ignores the rest of the contents. * * @see https://html.spec.whatwg.org/#doctype-public-identifier-(double-quoted)-state * @see https://html.spec.whatwg.org/#doctype-public-identifier-(single-quoted)-state */ $closer_quote = $doctype_html[ $at ]; /* * > This is a missing-quote-before-doctype-public-identifier parse error. Set the * > current DOCTYPE token's force-quirks flag to on. Reconsume in the bogus DOCTYPE state. */ if ( '"' !== $closer_quote && "'" !== $closer_quote ) { return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true ); } ++$at; $identifier_length = strcspn( $doctype_html, $closer_quote, $at, $end - $at ); $doctype_public_id = str_replace( "\0", "\u{FFFD}", substr( $doctype_html, $at, $identifier_length ) ); $at += $identifier_length; if ( $at >= $end || $closer_quote !== $doctype_html[ $at ] ) { return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true ); } ++$at; /* * "Between DOCTYPE public and system identifiers state" * * Advance through whitespace between public and system identifiers. * * @see https://html.spec.whatwg.org/#between-doctype-public-and-system-identifiers-state */ $at += strspn( $doctype_html, " \t\n\f\r", $at, $end - $at ); if ( $at >= $end ) { return new self( $doctype_name, $doctype_public_id, $doctype_system_id, false ); } parse_doctype_system_identifier: /* * The parser should enter "DOCTYPE system identifier (double-quoted) state" or * "DOCTYPE system identifier (single-quoted) state" by finding one of the valid quotes. * Anything else forces quirks mode and ignores the rest of the contents. * * @see https://html.spec.whatwg.org/#doctype-system-identifier-(double-quoted)-state * @see https://html.spec.whatwg.org/#doctype-system-identifier-(single-quoted)-state */ $closer_quote = $doctype_html[ $at ]; /* * > This is a missing-quote-before-doctype-system-identifier parse error. Set the * > current DOCTYPE token's force-quirks flag to on. Reconsume in the bogus DOCTYPE state. */ if ( '"' !== $closer_quote && "'" !== $closer_quote ) { return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true ); } ++$at; $identifier_length = strcspn( $doctype_html, $closer_quote, $at, $end - $at ); $doctype_system_id = str_replace( "\0", "\u{FFFD}", substr( $doctype_html, $at, $identifier_length ) ); $at += $identifier_length; if ( $at >= $end || $closer_quote !== $doctype_html[ $at ] ) { return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true ); } return new self( $doctype_name, $doctype_public_id, $doctype_system_id, false ); } }