const UNDEFINED_CODE_POINTS = new Set([
    65534, 65535, 131070, 131071, 196606, 196607, 262142, 262143, 327678, 327679, 393214,
    393215, 458750, 458751, 524286, 524287, 589822, 589823, 655358, 655359, 720894,
    720895, 786430, 786431, 851966, 851967, 917502, 917503, 983038, 983039, 1048574,
    1048575, 1114110, 1114111,
]);
const REPLACEMENT_CHARACTER = '\uFFFD';
var CODE_POINTS;
(function (CODE_POINTS) {
    CODE_POINTS[CODE_POINTS["EOF"] = -1] = "EOF";
    CODE_POINTS[CODE_POINTS["NULL"] = 0] = "NULL";
    CODE_POINTS[CODE_POINTS["TABULATION"] = 9] = "TABULATION";
    CODE_POINTS[CODE_POINTS["CARRIAGE_RETURN"] = 13] = "CARRIAGE_RETURN";
    CODE_POINTS[CODE_POINTS["LINE_FEED"] = 10] = "LINE_FEED";
    CODE_POINTS[CODE_POINTS["FORM_FEED"] = 12] = "FORM_FEED";
    CODE_POINTS[CODE_POINTS["SPACE"] = 32] = "SPACE";
    CODE_POINTS[CODE_POINTS["EXCLAMATION_MARK"] = 33] = "EXCLAMATION_MARK";
    CODE_POINTS[CODE_POINTS["QUOTATION_MARK"] = 34] = "QUOTATION_MARK";
    CODE_POINTS[CODE_POINTS["AMPERSAND"] = 38] = "AMPERSAND";
    CODE_POINTS[CODE_POINTS["APOSTROPHE"] = 39] = "APOSTROPHE";
    CODE_POINTS[CODE_POINTS["HYPHEN_MINUS"] = 45] = "HYPHEN_MINUS";
    CODE_POINTS[CODE_POINTS["SOLIDUS"] = 47] = "SOLIDUS";
    CODE_POINTS[CODE_POINTS["DIGIT_0"] = 48] = "DIGIT_0";
    CODE_POINTS[CODE_POINTS["DIGIT_9"] = 57] = "DIGIT_9";
    CODE_POINTS[CODE_POINTS["SEMICOLON"] = 59] = "SEMICOLON";
    CODE_POINTS[CODE_POINTS["LESS_THAN_SIGN"] = 60] = "LESS_THAN_SIGN";
    CODE_POINTS[CODE_POINTS["EQUALS_SIGN"] = 61] = "EQUALS_SIGN";
    CODE_POINTS[CODE_POINTS["GREATER_THAN_SIGN"] = 62] = "GREATER_THAN_SIGN";
    CODE_POINTS[CODE_POINTS["QUESTION_MARK"] = 63] = "QUESTION_MARK";
    CODE_POINTS[CODE_POINTS["LATIN_CAPITAL_A"] = 65] = "LATIN_CAPITAL_A";
    CODE_POINTS[CODE_POINTS["LATIN_CAPITAL_Z"] = 90] = "LATIN_CAPITAL_Z";
    CODE_POINTS[CODE_POINTS["RIGHT_SQUARE_BRACKET"] = 93] = "RIGHT_SQUARE_BRACKET";
    CODE_POINTS[CODE_POINTS["GRAVE_ACCENT"] = 96] = "GRAVE_ACCENT";
    CODE_POINTS[CODE_POINTS["LATIN_SMALL_A"] = 97] = "LATIN_SMALL_A";
    CODE_POINTS[CODE_POINTS["LATIN_SMALL_Z"] = 122] = "LATIN_SMALL_Z";
})(CODE_POINTS || (CODE_POINTS = {}));
const SEQUENCES = {
    DASH_DASH: '--',
    CDATA_START: '[CDATA[',
    DOCTYPE: 'doctype',
    SCRIPT: 'script',
    PUBLIC: 'public',
    SYSTEM: 'system',
};
//Surrogates
function isSurrogate(cp) {
    return cp >= 55296 && cp <= 57343;
}
function isSurrogatePair(cp) {
    return cp >= 56320 && cp <= 57343;
}
function getSurrogatePairCodePoint(cp1, cp2) {
    return (cp1 - 55296) * 1024 + 9216 + cp2;
}
//NOTE: excluding NULL and ASCII whitespace
function isControlCodePoint(cp) {
    return ((cp !== 0x20 && cp !== 0x0a && cp !== 0x0d && cp !== 0x09 && cp !== 0x0c && cp >= 0x01 && cp <= 0x1f) ||
        (cp >= 0x7f && cp <= 0x9f));
}
function isUndefinedCodePoint(cp) {
    return (cp >= 64976 && cp <= 65007) || UNDEFINED_CODE_POINTS.has(cp);
}

var ERR;
(function (ERR) {
    ERR["controlCharacterInInputStream"] = "control-character-in-input-stream";
    ERR["noncharacterInInputStream"] = "noncharacter-in-input-stream";
    ERR["surrogateInInputStream"] = "surrogate-in-input-stream";
    ERR["nonVoidHtmlElementStartTagWithTrailingSolidus"] = "non-void-html-element-start-tag-with-trailing-solidus";
    ERR["endTagWithAttributes"] = "end-tag-with-attributes";
    ERR["endTagWithTrailingSolidus"] = "end-tag-with-trailing-solidus";
    ERR["unexpectedSolidusInTag"] = "unexpected-solidus-in-tag";
    ERR["unexpectedNullCharacter"] = "unexpected-null-character";
    ERR["unexpectedQuestionMarkInsteadOfTagName"] = "unexpected-question-mark-instead-of-tag-name";
    ERR["invalidFirstCharacterOfTagName"] = "invalid-first-character-of-tag-name";
    ERR["unexpectedEqualsSignBeforeAttributeName"] = "unexpected-equals-sign-before-attribute-name";
    ERR["missingEndTagName"] = "missing-end-tag-name";
    ERR["unexpectedCharacterInAttributeName"] = "unexpected-character-in-attribute-name";
    ERR["unknownNamedCharacterReference"] = "unknown-named-character-reference";
    ERR["missingSemicolonAfterCharacterReference"] = "missing-semicolon-after-character-reference";
    ERR["unexpectedCharacterAfterDoctypeSystemIdentifier"] = "unexpected-character-after-doctype-system-identifier";
    ERR["unexpectedCharacterInUnquotedAttributeValue"] = "unexpected-character-in-unquoted-attribute-value";
    ERR["eofBeforeTagName"] = "eof-before-tag-name";
    ERR["eofInTag"] = "eof-in-tag";
    ERR["missingAttributeValue"] = "missing-attribute-value";
    ERR["missingWhitespaceBetweenAttributes"] = "missing-whitespace-between-attributes";
    ERR["missingWhitespaceAfterDoctypePublicKeyword"] = "missing-whitespace-after-doctype-public-keyword";
    ERR["missingWhitespaceBetweenDoctypePublicAndSystemIdentifiers"] = "missing-whitespace-between-doctype-public-and-system-identifiers";
    ERR["missingWhitespaceAfterDoctypeSystemKeyword"] = "missing-whitespace-after-doctype-system-keyword";
    ERR["missingQuoteBeforeDoctypePublicIdentifier"] = "missing-quote-before-doctype-public-identifier";
    ERR["missingQuoteBeforeDoctypeSystemIdentifier"] = "missing-quote-before-doctype-system-identifier";
    ERR["missingDoctypePublicIdentifier"] = "missing-doctype-public-identifier";
    ERR["missingDoctypeSystemIdentifier"] = "missing-doctype-system-identifier";
    ERR["abruptDoctypePublicIdentifier"] = "abrupt-doctype-public-identifier";
    ERR["abruptDoctypeSystemIdentifier"] = "abrupt-doctype-system-identifier";
    ERR["cdataInHtmlContent"] = "cdata-in-html-content";
    ERR["incorrectlyOpenedComment"] = "incorrectly-opened-comment";
    ERR["eofInScriptHtmlCommentLikeText"] = "eof-in-script-html-comment-like-text";
    ERR["eofInDoctype"] = "eof-in-doctype";
    ERR["nestedComment"] = "nested-comment";
    ERR["abruptClosingOfEmptyComment"] = "abrupt-closing-of-empty-comment";
    ERR["eofInComment"] = "eof-in-comment";
    ERR["incorrectlyClosedComment"] = "incorrectly-closed-comment";
    ERR["eofInCdata"] = "eof-in-cdata";
    ERR["absenceOfDigitsInNumericCharacterReference"] = "absence-of-digits-in-numeric-character-reference";
    ERR["nullCharacterReference"] = "null-character-reference";
    ERR["surrogateCharacterReference"] = "surrogate-character-reference";
    ERR["characterReferenceOutsideUnicodeRange"] = "character-reference-outside-unicode-range";
    ERR["controlCharacterReference"] = "control-character-reference";
    ERR["noncharacterCharacterReference"] = "noncharacter-character-reference";
    ERR["missingWhitespaceBeforeDoctypeName"] = "missing-whitespace-before-doctype-name";
    ERR["missingDoctypeName"] = "missing-doctype-name";
    ERR["invalidCharacterSequenceAfterDoctypeName"] = "invalid-character-sequence-after-doctype-name";
    ERR["duplicateAttribute"] = "duplicate-attribute";
    ERR["nonConformingDoctype"] = "non-conforming-doctype";
    ERR["missingDoctype"] = "missing-doctype";
    ERR["misplacedDoctype"] = "misplaced-doctype";
    ERR["endTagWithoutMatchingOpenElement"] = "end-tag-without-matching-open-element";
    ERR["closingOfElementWithOpenChildElements"] = "closing-of-element-with-open-child-elements";
    ERR["disallowedContentInNoscriptInHead"] = "disallowed-content-in-noscript-in-head";
    ERR["openElementsLeftAfterEof"] = "open-elements-left-after-eof";
    ERR["abandonedHeadElementChild"] = "abandoned-head-element-child";
    ERR["misplacedStartTagForHeadElement"] = "misplaced-start-tag-for-head-element";
    ERR["nestedNoscriptInHead"] = "nested-noscript-in-head";
    ERR["eofInElementThatCanContainOnlyText"] = "eof-in-element-that-can-contain-only-text";
})(ERR || (ERR = {}));

//Const
const DEFAULT_BUFFER_WATERLINE = 1 << 16;
//Preprocessor
//NOTE: HTML input preprocessing
//(see: http://www.whatwg.org/specs/web-apps/current-work/multipage/parsing.html#preprocessing-the-input-stream)
class Preprocessor {
    constructor(handler) {
        this.handler = handler;
        this.html = '';
        this.pos = -1;
        // NOTE: Initial `lastGapPos` is -2, to ensure `col` on initialisation is 0
        this.lastGapPos = -2;
        this.gapStack = [];
        this.skipNextNewLine = false;
        this.lastChunkWritten = false;
        this.endOfChunkHit = false;
        this.bufferWaterline = DEFAULT_BUFFER_WATERLINE;
        this.isEol = false;
        this.lineStartPos = 0;
        this.droppedBufferSize = 0;
        this.line = 1;
        //NOTE: avoid reporting errors twice on advance/retreat
        this.lastErrOffset = -1;
    }
    /** The column on the current line. If we just saw a gap (eg. a surrogate pair), return the index before. */
    get col() {
        return this.pos - this.lineStartPos + Number(this.lastGapPos !== this.pos);
    }
    get offset() {
        return this.droppedBufferSize + this.pos;
    }
    getError(code, cpOffset) {
        const { line, col, offset } = this;
        const startCol = col + cpOffset;
        const startOffset = offset + cpOffset;
        return {
            code,
            startLine: line,
            endLine: line,
            startCol,
            endCol: startCol,
            startOffset,
            endOffset: startOffset,
        };
    }
    _err(code) {
        if (this.handler.onParseError && this.lastErrOffset !== this.offset) {
            this.lastErrOffset = this.offset;
            this.handler.onParseError(this.getError(code, 0));
        }
    }
    _addGap() {
        this.gapStack.push(this.lastGapPos);
        this.lastGapPos = this.pos;
    }
    _processSurrogate(cp) {
        //NOTE: try to peek a surrogate pair
        if (this.pos !== this.html.length - 1) {
            const nextCp = this.html.charCodeAt(this.pos + 1);
            if (isSurrogatePair(nextCp)) {
                //NOTE: we have a surrogate pair. Peek pair character and recalculate code point.
                this.pos++;
                //NOTE: add a gap that should be avoided during retreat
                this._addGap();
                return getSurrogatePairCodePoint(cp, nextCp);
            }
        }
        //NOTE: we are at the end of a chunk, therefore we can't infer the surrogate pair yet.
        else if (!this.lastChunkWritten) {
            this.endOfChunkHit = true;
            return CODE_POINTS.EOF;
        }
        //NOTE: isolated surrogate
        this._err(ERR.surrogateInInputStream);
        return cp;
    }
    willDropParsedChunk() {
        return this.pos > this.bufferWaterline;
    }
    dropParsedChunk() {
        if (this.willDropParsedChunk()) {
            this.html = this.html.substring(this.pos);
            this.lineStartPos -= this.pos;
            this.droppedBufferSize += this.pos;
            this.pos = 0;
            this.lastGapPos = -2;
            this.gapStack.length = 0;
        }
    }
    write(chunk, isLastChunk) {
        if (this.html.length > 0) {
            this.html += chunk;
        }
        else {
            this.html = chunk;
        }
        this.endOfChunkHit = false;
        this.lastChunkWritten = isLastChunk;
    }
    insertHtmlAtCurrentPos(chunk) {
        this.html = this.html.substring(0, this.pos + 1) + chunk + this.html.substring(this.pos + 1);
        this.endOfChunkHit = false;
    }
    startsWith(pattern, caseSensitive) {
        // Check if our buffer has enough characters
        if (this.pos + pattern.length > this.html.length) {
            this.endOfChunkHit = !this.lastChunkWritten;
            return false;
        }
        if (caseSensitive) {
            return this.html.startsWith(pattern, this.pos);
        }
        for (let i = 0; i < pattern.length; i++) {
            const cp = this.html.charCodeAt(this.pos + i) | 0x20;
            if (cp !== pattern.charCodeAt(i)) {
                return false;
            }
        }
        return true;
    }
    peek(offset) {
        const pos = this.pos + offset;
        if (pos >= this.html.length) {
            this.endOfChunkHit = !this.lastChunkWritten;
            return CODE_POINTS.EOF;
        }
        const code = this.html.charCodeAt(pos);
        return code === CODE_POINTS.CARRIAGE_RETURN ? CODE_POINTS.LINE_FEED : code;
    }
    advance() {
        this.pos++;
        //NOTE: LF should be in the last column of the line
        if (this.isEol) {
            this.isEol = false;
            this.line++;
            this.lineStartPos = this.pos;
        }
        if (this.pos >= this.html.length) {
            this.endOfChunkHit = !this.lastChunkWritten;
            return CODE_POINTS.EOF;
        }
        let cp = this.html.charCodeAt(this.pos);
        //NOTE: all U+000D CARRIAGE RETURN (CR) characters must be converted to U+000A LINE FEED (LF) characters
        if (cp === CODE_POINTS.CARRIAGE_RETURN) {
            this.isEol = true;
            this.skipNextNewLine = true;
            return CODE_POINTS.LINE_FEED;
        }
        //NOTE: any U+000A LINE FEED (LF) characters that immediately follow a U+000D CARRIAGE RETURN (CR) character
        //must be ignored.
        if (cp === CODE_POINTS.LINE_FEED) {
            this.isEol = true;
            if (this.skipNextNewLine) {
                // `line` will be bumped again in the recursive call.
                this.line--;
                this.skipNextNewLine = false;
                this._addGap();
                return this.advance();
            }
        }
        this.skipNextNewLine = false;
        if (isSurrogate(cp)) {
            cp = this._processSurrogate(cp);
        }
        //OPTIMIZATION: first check if code point is in the common allowed
        //range (ASCII alphanumeric, whitespaces, big chunk of BMP)
        //before going into detailed performance cost validation.
        const isCommonValidRange = this.handler.onParseError === null ||
            (cp > 0x1f && cp < 0x7f) ||
            cp === CODE_POINTS.LINE_FEED ||
            cp === CODE_POINTS.CARRIAGE_RETURN ||
            (cp > 0x9f && cp < 64976);
        if (!isCommonValidRange) {
            this._checkForProblematicCharacters(cp);
        }
        return cp;
    }
    _checkForProblematicCharacters(cp) {
        if (isControlCodePoint(cp)) {
            this._err(ERR.controlCharacterInInputStream);
        }
        else if (isUndefinedCodePoint(cp)) {
            this._err(ERR.noncharacterInInputStream);
        }
    }
    retreat(count) {
        this.pos -= count;
        while (this.pos < this.lastGapPos) {
            this.lastGapPos = this.gapStack.pop();
            this.pos--;
        }
        this.isEol = false;
    }
}

var TokenType;
(function (TokenType) {
    TokenType[TokenType["CHARACTER"] = 0] = "CHARACTER";
    TokenType[TokenType["NULL_CHARACTER"] = 1] = "NULL_CHARACTER";
    TokenType[TokenType["WHITESPACE_CHARACTER"] = 2] = "WHITESPACE_CHARACTER";
    TokenType[TokenType["START_TAG"] = 3] = "START_TAG";
    TokenType[TokenType["END_TAG"] = 4] = "END_TAG";
    TokenType[TokenType["COMMENT"] = 5] = "COMMENT";
    TokenType[TokenType["DOCTYPE"] = 6] = "DOCTYPE";
    TokenType[TokenType["EOF"] = 7] = "EOF";
    TokenType[TokenType["HIBERNATION"] = 8] = "HIBERNATION";
})(TokenType || (TokenType = {}));
function getTokenAttr(token, attrName) {
    for (let i = token.attrs.length - 1; i >= 0; i--) {
        if (token.attrs[i].name === attrName) {
            return token.attrs[i].value;
        }
    }
    return null;
}

// Generated using scripts/write-decode-map.ts
var htmlDecodeTree = new Uint16Array(
// prettier-ignore
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    .split("")
    .map((c) => c.charCodeAt(0)));

// Generated using scripts/write-decode-map.ts
new Uint16Array(
// prettier-ignore
"\u0200aglq\t\x15\x18\x1b\u026d\x0f\0\0\x12p;\u4026os;\u4027t;\u403et;\u403cuot;\u4022"
    .split("")
    .map((c) => c.charCodeAt(0)));

// Adapted from https://github.com/mathiasbynens/he/blob/36afe179392226cf1b6ccdb16ebbb7a5a844d93a/src/he.js#L106-L134
const decodeMap = new Map([
    [0, 65533],
    // C1 Unicode control character reference replacements
    [128, 8364],
    [130, 8218],
    [131, 402],
    [132, 8222],
    [133, 8230],
    [134, 8224],
    [135, 8225],
    [136, 710],
    [137, 8240],
    [138, 352],
    [139, 8249],
    [140, 338],
    [142, 381],
    [145, 8216],
    [146, 8217],
    [147, 8220],
    [148, 8221],
    [149, 8226],
    [150, 8211],
    [151, 8212],
    [152, 732],
    [153, 8482],
    [154, 353],
    [155, 8250],
    [156, 339],
    [158, 382],
    [159, 376],
]);
/**
 * Replace the given code point with a replacement character if it is a
 * surrogate or is outside the valid range. Otherwise return the code
 * point unchanged.
 */
function replaceCodePoint(codePoint) {
    var _a;
    if ((codePoint >= 0xd800 && codePoint <= 0xdfff) || codePoint > 0x10ffff) {
        return 0xfffd;
    }
    return (_a = decodeMap.get(codePoint)) !== null && _a !== void 0 ? _a : codePoint;
}

var CharCodes;
(function (CharCodes) {
    CharCodes[CharCodes["NUM"] = 35] = "NUM";
    CharCodes[CharCodes["SEMI"] = 59] = "SEMI";
    CharCodes[CharCodes["EQUALS"] = 61] = "EQUALS";
    CharCodes[CharCodes["ZERO"] = 48] = "ZERO";
    CharCodes[CharCodes["NINE"] = 57] = "NINE";
    CharCodes[CharCodes["LOWER_A"] = 97] = "LOWER_A";
    CharCodes[CharCodes["LOWER_F"] = 102] = "LOWER_F";
    CharCodes[CharCodes["LOWER_X"] = 120] = "LOWER_X";
    CharCodes[CharCodes["LOWER_Z"] = 122] = "LOWER_Z";
    CharCodes[CharCodes["UPPER_A"] = 65] = "UPPER_A";
    CharCodes[CharCodes["UPPER_F"] = 70] = "UPPER_F";
    CharCodes[CharCodes["UPPER_Z"] = 90] = "UPPER_Z";
})(CharCodes || (CharCodes = {}));
/** Bit that needs to be set to convert an upper case ASCII character to lower case */
const TO_LOWER_BIT = 0b100000;
var BinTrieFlags;
(function (BinTrieFlags) {
    BinTrieFlags[BinTrieFlags["VALUE_LENGTH"] = 49152] = "VALUE_LENGTH";
    BinTrieFlags[BinTrieFlags["BRANCH_LENGTH"] = 16256] = "BRANCH_LENGTH";
    BinTrieFlags[BinTrieFlags["JUMP_TABLE"] = 127] = "JUMP_TABLE";
})(BinTrieFlags || (BinTrieFlags = {}));
function isNumber(code) {
    return code >= CharCodes.ZERO && code <= CharCodes.NINE;
}
function isHexadecimalCharacter(code) {
    return ((code >= CharCodes.UPPER_A && code <= CharCodes.UPPER_F) ||
        (code >= CharCodes.LOWER_A && code <= CharCodes.LOWER_F));
}
function isAsciiAlphaNumeric$1(code) {
    return ((code >= CharCodes.UPPER_A && code <= CharCodes.UPPER_Z) ||
        (code >= CharCodes.LOWER_A && code <= CharCodes.LOWER_Z) ||
        isNumber(code));
}
/**
 * Checks if the given character is a valid end character for an entity in an attribute.
 *
 * Attribute values that aren't terminated properly aren't parsed, and shouldn't lead to a parser error.
 * See the example in https://html.spec.whatwg.org/multipage/parsing.html#named-character-reference-state
 */
function isEntityInAttributeInvalidEnd(code) {
    return code === CharCodes.EQUALS || isAsciiAlphaNumeric$1(code);
}
var EntityDecoderState;
(function (EntityDecoderState) {
    EntityDecoderState[EntityDecoderState["EntityStart"] = 0] = "EntityStart";
    EntityDecoderState[EntityDecoderState["NumericStart"] = 1] = "NumericStart";
    EntityDecoderState[EntityDecoderState["NumericDecimal"] = 2] = "NumericDecimal";
    EntityDecoderState[EntityDecoderState["NumericHex"] = 3] = "NumericHex";
    EntityDecoderState[EntityDecoderState["NamedEntity"] = 4] = "NamedEntity";
})(EntityDecoderState || (EntityDecoderState = {}));
var DecodingMode;
(function (DecodingMode) {
    /** Entities in text nodes that can end with any character. */
    DecodingMode[DecodingMode["Legacy"] = 0] = "Legacy";
    /** Only allow entities terminated with a semicolon. */
    DecodingMode[DecodingMode["Strict"] = 1] = "Strict";
    /** Entities in attributes have limitations on ending characters. */
    DecodingMode[DecodingMode["Attribute"] = 2] = "Attribute";
})(DecodingMode || (DecodingMode = {}));
/**
 * Token decoder with support of writing partial entities.
 */
class EntityDecoder {
    constructor(
    /** The tree used to decode entities. */
    decodeTree, 
    /**
     * The function that is called when a codepoint is decoded.
     *
     * For multi-byte named entities, this will be called multiple times,
     * with the second codepoint, and the same `consumed` value.
     *
     * @param codepoint The decoded codepoint.
     * @param consumed The number of bytes consumed by the decoder.
     */
    emitCodePoint, 
    /** An object that is used to produce errors. */
    errors) {
        this.decodeTree = decodeTree;
        this.emitCodePoint = emitCodePoint;
        this.errors = errors;
        /** The current state of the decoder. */
        this.state = EntityDecoderState.EntityStart;
        /** Characters that were consumed while parsing an entity. */
        this.consumed = 1;
        /**
         * The result of the entity.
         *
         * Either the result index of a numeric entity, or the codepoint of a
         * numeric entity.
         */
        this.result = 0;
        /** The current index in the decode tree. */
        this.treeIndex = 0;
        /** The number of characters that were consumed in excess. */
        this.excess = 1;
        /** The mode in which the decoder is operating. */
        this.decodeMode = DecodingMode.Strict;
    }
    /** Resets the instance to make it reusable. */
    startEntity(decodeMode) {
        this.decodeMode = decodeMode;
        this.state = EntityDecoderState.EntityStart;
        this.result = 0;
        this.treeIndex = 0;
        this.excess = 1;
        this.consumed = 1;
    }
    /**
     * Write an entity to the decoder. This can be called multiple times with partial entities.
     * If the entity is incomplete, the decoder will return -1.
     *
     * Mirrors the implementation of `getDecoder`, but with the ability to stop decoding if the
     * entity is incomplete, and resume when the next string is written.
     *
     * @param string The string containing the entity (or a continuation of the entity).
     * @param offset The offset at which the entity begins. Should be 0 if this is not the first call.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */
    write(str, offset) {
        switch (this.state) {
            case EntityDecoderState.EntityStart: {
                if (str.charCodeAt(offset) === CharCodes.NUM) {
                    this.state = EntityDecoderState.NumericStart;
                    this.consumed += 1;
                    return this.stateNumericStart(str, offset + 1);
                }
                this.state = EntityDecoderState.NamedEntity;
                return this.stateNamedEntity(str, offset);
            }
            case EntityDecoderState.NumericStart: {
                return this.stateNumericStart(str, offset);
            }
            case EntityDecoderState.NumericDecimal: {
                return this.stateNumericDecimal(str, offset);
            }
            case EntityDecoderState.NumericHex: {
                return this.stateNumericHex(str, offset);
            }
            case EntityDecoderState.NamedEntity: {
                return this.stateNamedEntity(str, offset);
            }
        }
    }
    /**
     * Switches between the numeric decimal and hexadecimal states.
     *
     * Equivalent to the `Numeric character reference state` in the HTML spec.
     *
     * @param str The string containing the entity (or a continuation of the entity).
     * @param offset The current offset.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */
    stateNumericStart(str, offset) {
        if (offset >= str.length) {
            return -1;
        }
        if ((str.charCodeAt(offset) | TO_LOWER_BIT) === CharCodes.LOWER_X) {
            this.state = EntityDecoderState.NumericHex;
            this.consumed += 1;
            return this.stateNumericHex(str, offset + 1);
        }
        this.state = EntityDecoderState.NumericDecimal;
        return this.stateNumericDecimal(str, offset);
    }
    addToNumericResult(str, start, end, base) {
        if (start !== end) {
            const digitCount = end - start;
            this.result =
                this.result * Math.pow(base, digitCount) +
                    parseInt(str.substr(start, digitCount), base);
            this.consumed += digitCount;
        }
    }
    /**
     * Parses a hexadecimal numeric entity.
     *
     * Equivalent to the `Hexademical character reference state` in the HTML spec.
     *
     * @param str The string containing the entity (or a continuation of the entity).
     * @param offset The current offset.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */
    stateNumericHex(str, offset) {
        const startIdx = offset;
        while (offset < str.length) {
            const char = str.charCodeAt(offset);
            if (isNumber(char) || isHexadecimalCharacter(char)) {
                offset += 1;
            }
            else {
                this.addToNumericResult(str, startIdx, offset, 16);
                return this.emitNumericEntity(char, 3);
            }
        }
        this.addToNumericResult(str, startIdx, offset, 16);
        return -1;
    }
    /**
     * Parses a decimal numeric entity.
     *
     * Equivalent to the `Decimal character reference state` in the HTML spec.
     *
     * @param str The string containing the entity (or a continuation of the entity).
     * @param offset The current offset.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */
    stateNumericDecimal(str, offset) {
        const startIdx = offset;
        while (offset < str.length) {
            const char = str.charCodeAt(offset);
            if (isNumber(char)) {
                offset += 1;
            }
            else {
                this.addToNumericResult(str, startIdx, offset, 10);
                return this.emitNumericEntity(char, 2);
            }
        }
        this.addToNumericResult(str, startIdx, offset, 10);
        return -1;
    }
    /**
     * Validate and emit a numeric entity.
     *
     * Implements the logic from the `Hexademical character reference start
     * state` and `Numeric character reference end state` in the HTML spec.
     *
     * @param lastCp The last code point of the entity. Used to see if the
     *               entity was terminated with a semicolon.
     * @param expectedLength The minimum number of characters that should be
     *                       consumed. Used to validate that at least one digit
     *                       was consumed.
     * @returns The number of characters that were consumed.
     */
    emitNumericEntity(lastCp, expectedLength) {
        var _a;
        // Ensure we consumed at least one digit.
        if (this.consumed <= expectedLength) {
            (_a = this.errors) === null || _a === void 0 ? void 0 : _a.absenceOfDigitsInNumericCharacterReference(this.consumed);
            return 0;
        }
        // Figure out if this is a legit end of the entity
        if (lastCp === CharCodes.SEMI) {
            this.consumed += 1;
        }
        else if (this.decodeMode === DecodingMode.Strict) {
            return 0;
        }
        this.emitCodePoint(replaceCodePoint(this.result), this.consumed);
        if (this.errors) {
            if (lastCp !== CharCodes.SEMI) {
                this.errors.missingSemicolonAfterCharacterReference();
            }
            this.errors.validateNumericCharacterReference(this.result);
        }
        return this.consumed;
    }
    /**
     * Parses a named entity.
     *
     * Equivalent to the `Named character reference state` in the HTML spec.
     *
     * @param str The string containing the entity (or a continuation of the entity).
     * @param offset The current offset.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */
    stateNamedEntity(str, offset) {
        const { decodeTree } = this;
        let current = decodeTree[this.treeIndex];
        // The mask is the number of bytes of the value, including the current byte.
        let valueLength = (current & BinTrieFlags.VALUE_LENGTH) >> 14;
        for (; offset < str.length; offset++, this.excess++) {
            const char = str.charCodeAt(offset);
            this.treeIndex = determineBranch(decodeTree, current, this.treeIndex + Math.max(1, valueLength), char);
            if (this.treeIndex < 0) {
                return this.result === 0 ||
                    // If we are parsing an attribute
                    (this.decodeMode === DecodingMode.Attribute &&
                        // We shouldn't have consumed any characters after the entity,
                        (valueLength === 0 ||
                            // And there should be no invalid characters.
                            isEntityInAttributeInvalidEnd(char)))
                    ? 0
                    : this.emitNotTerminatedNamedEntity();
            }
            current = decodeTree[this.treeIndex];
            valueLength = (current & BinTrieFlags.VALUE_LENGTH) >> 14;
            // If the branch is a value, store it and continue
            if (valueLength !== 0) {
                // If the entity is terminated by a semicolon, we are done.
                if (char === CharCodes.SEMI) {
                    return this.emitNamedEntityData(this.treeIndex, valueLength, this.consumed + this.excess);
                }
                // If we encounter a non-terminated (legacy) entity while parsing strictly, then ignore it.
                if (this.decodeMode !== DecodingMode.Strict) {
                    this.result = this.treeIndex;
                    this.consumed += this.excess;
                    this.excess = 0;
                }
            }
        }
        return -1;
    }
    /**
     * Emit a named entity that was not terminated with a semicolon.
     *
     * @returns The number of characters consumed.
     */
    emitNotTerminatedNamedEntity() {
        var _a;
        const { result, decodeTree } = this;
        const valueLength = (decodeTree[result] & BinTrieFlags.VALUE_LENGTH) >> 14;
        this.emitNamedEntityData(result, valueLength, this.consumed);
        (_a = this.errors) === null || _a === void 0 ? void 0 : _a.missingSemicolonAfterCharacterReference();
        return this.consumed;
    }
    /**
     * Emit a named entity.
     *
     * @param result The index of the entity in the decode tree.
     * @param valueLength The number of bytes in the entity.
     * @param consumed The number of characters consumed.
     *
     * @returns The number of characters consumed.
     */
    emitNamedEntityData(result, valueLength, consumed) {
        const { decodeTree } = this;
        this.emitCodePoint(valueLength === 1
            ? decodeTree[result] & ~BinTrieFlags.VALUE_LENGTH
            : decodeTree[result + 1], consumed);
        if (valueLength === 3) {
            // For multi-byte values, we need to emit the second byte.
            this.emitCodePoint(decodeTree[result + 2], consumed);
        }
        return consumed;
    }
    /**
     * Signal to the parser that the end of the input was reached.
     *
     * Remaining data will be emitted and relevant errors will be produced.
     *
     * @returns The number of characters consumed.
     */
    end() {
        var _a;
        switch (this.state) {
            case EntityDecoderState.NamedEntity: {
                // Emit a named entity if we have one.
                return this.result !== 0 &&
                    (this.decodeMode !== DecodingMode.Attribute ||
                        this.result === this.treeIndex)
                    ? this.emitNotTerminatedNamedEntity()
                    : 0;
            }
            // Otherwise, emit a numeric entity if we have one.
            case EntityDecoderState.NumericDecimal: {
                return this.emitNumericEntity(0, 2);
            }
            case EntityDecoderState.NumericHex: {
                return this.emitNumericEntity(0, 3);
            }
            case EntityDecoderState.NumericStart: {
                (_a = this.errors) === null || _a === void 0 ? void 0 : _a.absenceOfDigitsInNumericCharacterReference(this.consumed);
                return 0;
            }
            case EntityDecoderState.EntityStart: {
                // Return 0 if we have no entity.
                return 0;
            }
        }
    }
}
/**
 * Determines the branch of the current node that is taken given the current
 * character. This function is used to traverse the trie.
 *
 * @param decodeTree The trie.
 * @param current The current node.
 * @param nodeIdx The index right after the current node and its value.
 * @param char The current character.
 * @returns The index of the next node, or -1 if no branch is taken.
 */
function determineBranch(decodeTree, current, nodeIdx, char) {
    const branchCount = (current & BinTrieFlags.BRANCH_LENGTH) >> 7;
    const jumpOffset = current & BinTrieFlags.JUMP_TABLE;
    // Case 1: Single branch encoded in jump offset
    if (branchCount === 0) {
        return jumpOffset !== 0 && char === jumpOffset ? nodeIdx : -1;
    }
    // Case 2: Multiple branches encoded in jump table
    if (jumpOffset) {
        const value = char - jumpOffset;
        return value < 0 || value >= branchCount
            ? -1
            : decodeTree[nodeIdx + value] - 1;
    }
    // Case 3: Multiple branches encoded in dictionary
    // Binary search for the character.
    let lo = nodeIdx;
    let hi = lo + branchCount - 1;
    while (lo <= hi) {
        const mid = (lo + hi) >>> 1;
        const midVal = decodeTree[mid];
        if (midVal < char) {
            lo = mid + 1;
        }
        else if (midVal > char) {
            hi = mid - 1;
        }
        else {
            return decodeTree[mid + branchCount];
        }
    }
    return -1;
}

/** All valid namespaces in HTML. */
var NS;
(function (NS) {
    NS["HTML"] = "http://www.w3.org/1999/xhtml";
    NS["MATHML"] = "http://www.w3.org/1998/Math/MathML";
    NS["SVG"] = "http://www.w3.org/2000/svg";
    NS["XLINK"] = "http://www.w3.org/1999/xlink";
    NS["XML"] = "http://www.w3.org/XML/1998/namespace";
    NS["XMLNS"] = "http://www.w3.org/2000/xmlns/";
})(NS || (NS = {}));
var ATTRS;
(function (ATTRS) {
    ATTRS["TYPE"] = "type";
    ATTRS["ACTION"] = "action";
    ATTRS["ENCODING"] = "encoding";
    ATTRS["PROMPT"] = "prompt";
    ATTRS["NAME"] = "name";
    ATTRS["COLOR"] = "color";
    ATTRS["FACE"] = "face";
    ATTRS["SIZE"] = "size";
})(ATTRS || (ATTRS = {}));
/**
 * The mode of the document.
 *
 * @see {@link https://dom.spec.whatwg.org/#concept-document-limited-quirks}
 */
var DOCUMENT_MODE;
(function (DOCUMENT_MODE) {
    DOCUMENT_MODE["NO_QUIRKS"] = "no-quirks";
    DOCUMENT_MODE["QUIRKS"] = "quirks";
    DOCUMENT_MODE["LIMITED_QUIRKS"] = "limited-quirks";
})(DOCUMENT_MODE || (DOCUMENT_MODE = {}));
var TAG_NAMES;
(function (TAG_NAMES) {
    TAG_NAMES["A"] = "a";
    TAG_NAMES["ADDRESS"] = "address";
    TAG_NAMES["ANNOTATION_XML"] = "annotation-xml";
    TAG_NAMES["APPLET"] = "applet";
    TAG_NAMES["AREA"] = "area";
    TAG_NAMES["ARTICLE"] = "article";
    TAG_NAMES["ASIDE"] = "aside";
    TAG_NAMES["B"] = "b";
    TAG_NAMES["BASE"] = "base";
    TAG_NAMES["BASEFONT"] = "basefont";
    TAG_NAMES["BGSOUND"] = "bgsound";
    TAG_NAMES["BIG"] = "big";
    TAG_NAMES["BLOCKQUOTE"] = "blockquote";
    TAG_NAMES["BODY"] = "body";
    TAG_NAMES["BR"] = "br";
    TAG_NAMES["BUTTON"] = "button";
    TAG_NAMES["CAPTION"] = "caption";
    TAG_NAMES["CENTER"] = "center";
    TAG_NAMES["CODE"] = "code";
    TAG_NAMES["COL"] = "col";
    TAG_NAMES["COLGROUP"] = "colgroup";
    TAG_NAMES["DD"] = "dd";
    TAG_NAMES["DESC"] = "desc";
    TAG_NAMES["DETAILS"] = "details";
    TAG_NAMES["DIALOG"] = "dialog";
    TAG_NAMES["DIR"] = "dir";
    TAG_NAMES["DIV"] = "div";
    TAG_NAMES["DL"] = "dl";
    TAG_NAMES["DT"] = "dt";
    TAG_NAMES["EM"] = "em";
    TAG_NAMES["EMBED"] = "embed";
    TAG_NAMES["FIELDSET"] = "fieldset";
    TAG_NAMES["FIGCAPTION"] = "figcaption";
    TAG_NAMES["FIGURE"] = "figure";
    TAG_NAMES["FONT"] = "font";
    TAG_NAMES["FOOTER"] = "footer";
    TAG_NAMES["FOREIGN_OBJECT"] = "foreignObject";
    TAG_NAMES["FORM"] = "form";
    TAG_NAMES["FRAME"] = "frame";
    TAG_NAMES["FRAMESET"] = "frameset";
    TAG_NAMES["H1"] = "h1";
    TAG_NAMES["H2"] = "h2";
    TAG_NAMES["H3"] = "h3";
    TAG_NAMES["H4"] = "h4";
    TAG_NAMES["H5"] = "h5";
    TAG_NAMES["H6"] = "h6";
    TAG_NAMES["HEAD"] = "head";
    TAG_NAMES["HEADER"] = "header";
    TAG_NAMES["HGROUP"] = "hgroup";
    TAG_NAMES["HR"] = "hr";
    TAG_NAMES["HTML"] = "html";
    TAG_NAMES["I"] = "i";
    TAG_NAMES["IMG"] = "img";
    TAG_NAMES["IMAGE"] = "image";
    TAG_NAMES["INPUT"] = "input";
    TAG_NAMES["IFRAME"] = "iframe";
    TAG_NAMES["KEYGEN"] = "keygen";
    TAG_NAMES["LABEL"] = "label";
    TAG_NAMES["LI"] = "li";
    TAG_NAMES["LINK"] = "link";
    TAG_NAMES["LISTING"] = "listing";
    TAG_NAMES["MAIN"] = "main";
    TAG_NAMES["MALIGNMARK"] = "malignmark";
    TAG_NAMES["MARQUEE"] = "marquee";
    TAG_NAMES["MATH"] = "math";
    TAG_NAMES["MENU"] = "menu";
    TAG_NAMES["META"] = "meta";
    TAG_NAMES["MGLYPH"] = "mglyph";
    TAG_NAMES["MI"] = "mi";
    TAG_NAMES["MO"] = "mo";
    TAG_NAMES["MN"] = "mn";
    TAG_NAMES["MS"] = "ms";
    TAG_NAMES["MTEXT"] = "mtext";
    TAG_NAMES["NAV"] = "nav";
    TAG_NAMES["NOBR"] = "nobr";
    TAG_NAMES["NOFRAMES"] = "noframes";
    TAG_NAMES["NOEMBED"] = "noembed";
    TAG_NAMES["NOSCRIPT"] = "noscript";
    TAG_NAMES["OBJECT"] = "object";
    TAG_NAMES["OL"] = "ol";
    TAG_NAMES["OPTGROUP"] = "optgroup";
    TAG_NAMES["OPTION"] = "option";
    TAG_NAMES["P"] = "p";
    TAG_NAMES["PARAM"] = "param";
    TAG_NAMES["PLAINTEXT"] = "plaintext";
    TAG_NAMES["PRE"] = "pre";
    TAG_NAMES["RB"] = "rb";
    TAG_NAMES["RP"] = "rp";
    TAG_NAMES["RT"] = "rt";
    TAG_NAMES["RTC"] = "rtc";
    TAG_NAMES["RUBY"] = "ruby";
    TAG_NAMES["S"] = "s";
    TAG_NAMES["SCRIPT"] = "script";
    TAG_NAMES["SEARCH"] = "search";
    TAG_NAMES["SECTION"] = "section";
    TAG_NAMES["SELECT"] = "select";
    TAG_NAMES["SOURCE"] = "source";
    TAG_NAMES["SMALL"] = "small";
    TAG_NAMES["SPAN"] = "span";
    TAG_NAMES["STRIKE"] = "strike";
    TAG_NAMES["STRONG"] = "strong";
    TAG_NAMES["STYLE"] = "style";
    TAG_NAMES["SUB"] = "sub";
    TAG_NAMES["SUMMARY"] = "summary";
    TAG_NAMES["SUP"] = "sup";
    TAG_NAMES["TABLE"] = "table";
    TAG_NAMES["TBODY"] = "tbody";
    TAG_NAMES["TEMPLATE"] = "template";
    TAG_NAMES["TEXTAREA"] = "textarea";
    TAG_NAMES["TFOOT"] = "tfoot";
    TAG_NAMES["TD"] = "td";
    TAG_NAMES["TH"] = "th";
    TAG_NAMES["THEAD"] = "thead";
    TAG_NAMES["TITLE"] = "title";
    TAG_NAMES["TR"] = "tr";
    TAG_NAMES["TRACK"] = "track";
    TAG_NAMES["TT"] = "tt";
    TAG_NAMES["U"] = "u";
    TAG_NAMES["UL"] = "ul";
    TAG_NAMES["SVG"] = "svg";
    TAG_NAMES["VAR"] = "var";
    TAG_NAMES["WBR"] = "wbr";
    TAG_NAMES["XMP"] = "xmp";
})(TAG_NAMES || (TAG_NAMES = {}));
/**
 * Tag IDs are numeric IDs for known tag names.
 *
 * We use tag IDs to improve the performance of tag name comparisons.
 */
var TAG_ID;
(function (TAG_ID) {
    TAG_ID[TAG_ID["UNKNOWN"] = 0] = "UNKNOWN";
    TAG_ID[TAG_ID["A"] = 1] = "A";
    TAG_ID[TAG_ID["ADDRESS"] = 2] = "ADDRESS";
    TAG_ID[TAG_ID["ANNOTATION_XML"] = 3] = "ANNOTATION_XML";
    TAG_ID[TAG_ID["APPLET"] = 4] = "APPLET";
    TAG_ID[TAG_ID["AREA"] = 5] = "AREA";
    TAG_ID[TAG_ID["ARTICLE"] = 6] = "ARTICLE";
    TAG_ID[TAG_ID["ASIDE"] = 7] = "ASIDE";
    TAG_ID[TAG_ID["B"] = 8] = "B";
    TAG_ID[TAG_ID["BASE"] = 9] = "BASE";
    TAG_ID[TAG_ID["BASEFONT"] = 10] = "BASEFONT";
    TAG_ID[TAG_ID["BGSOUND"] = 11] = "BGSOUND";
    TAG_ID[TAG_ID["BIG"] = 12] = "BIG";
    TAG_ID[TAG_ID["BLOCKQUOTE"] = 13] = "BLOCKQUOTE";
    TAG_ID[TAG_ID["BODY"] = 14] = "BODY";
    TAG_ID[TAG_ID["BR"] = 15] = "BR";
    TAG_ID[TAG_ID["BUTTON"] = 16] = "BUTTON";
    TAG_ID[TAG_ID["CAPTION"] = 17] = "CAPTION";
    TAG_ID[TAG_ID["CENTER"] = 18] = "CENTER";
    TAG_ID[TAG_ID["CODE"] = 19] = "CODE";
    TAG_ID[TAG_ID["COL"] = 20] = "COL";
    TAG_ID[TAG_ID["COLGROUP"] = 21] = "COLGROUP";
    TAG_ID[TAG_ID["DD"] = 22] = "DD";
    TAG_ID[TAG_ID["DESC"] = 23] = "DESC";
    TAG_ID[TAG_ID["DETAILS"] = 24] = "DETAILS";
    TAG_ID[TAG_ID["DIALOG"] = 25] = "DIALOG";
    TAG_ID[TAG_ID["DIR"] = 26] = "DIR";
    TAG_ID[TAG_ID["DIV"] = 27] = "DIV";
    TAG_ID[TAG_ID["DL"] = 28] = "DL";
    TAG_ID[TAG_ID["DT"] = 29] = "DT";
    TAG_ID[TAG_ID["EM"] = 30] = "EM";
    TAG_ID[TAG_ID["EMBED"] = 31] = "EMBED";
    TAG_ID[TAG_ID["FIELDSET"] = 32] = "FIELDSET";
    TAG_ID[TAG_ID["FIGCAPTION"] = 33] = "FIGCAPTION";
    TAG_ID[TAG_ID["FIGURE"] = 34] = "FIGURE";
    TAG_ID[TAG_ID["FONT"] = 35] = "FONT";
    TAG_ID[TAG_ID["FOOTER"] = 36] = "FOOTER";
    TAG_ID[TAG_ID["FOREIGN_OBJECT"] = 37] = "FOREIGN_OBJECT";
    TAG_ID[TAG_ID["FORM"] = 38] = "FORM";
    TAG_ID[TAG_ID["FRAME"] = 39] = "FRAME";
    TAG_ID[TAG_ID["FRAMESET"] = 40] = "FRAMESET";
    TAG_ID[TAG_ID["H1"] = 41] = "H1";
    TAG_ID[TAG_ID["H2"] = 42] = "H2";
    TAG_ID[TAG_ID["H3"] = 43] = "H3";
    TAG_ID[TAG_ID["H4"] = 44] = "H4";
    TAG_ID[TAG_ID["H5"] = 45] = "H5";
    TAG_ID[TAG_ID["H6"] = 46] = "H6";
    TAG_ID[TAG_ID["HEAD"] = 47] = "HEAD";
    TAG_ID[TAG_ID["HEADER"] = 48] = "HEADER";
    TAG_ID[TAG_ID["HGROUP"] = 49] = "HGROUP";
    TAG_ID[TAG_ID["HR"] = 50] = "HR";
    TAG_ID[TAG_ID["HTML"] = 51] = "HTML";
    TAG_ID[TAG_ID["I"] = 52] = "I";
    TAG_ID[TAG_ID["IMG"] = 53] = "IMG";
    TAG_ID[TAG_ID["IMAGE"] = 54] = "IMAGE";
    TAG_ID[TAG_ID["INPUT"] = 55] = "INPUT";
    TAG_ID[TAG_ID["IFRAME"] = 56] = "IFRAME";
    TAG_ID[TAG_ID["KEYGEN"] = 57] = "KEYGEN";
    TAG_ID[TAG_ID["LABEL"] = 58] = "LABEL";
    TAG_ID[TAG_ID["LI"] = 59] = "LI";
    TAG_ID[TAG_ID["LINK"] = 60] = "LINK";
    TAG_ID[TAG_ID["LISTING"] = 61] = "LISTING";
    TAG_ID[TAG_ID["MAIN"] = 62] = "MAIN";
    TAG_ID[TAG_ID["MALIGNMARK"] = 63] = "MALIGNMARK";
    TAG_ID[TAG_ID["MARQUEE"] = 64] = "MARQUEE";
    TAG_ID[TAG_ID["MATH"] = 65] = "MATH";
    TAG_ID[TAG_ID["MENU"] = 66] = "MENU";
    TAG_ID[TAG_ID["META"] = 67] = "META";
    TAG_ID[TAG_ID["MGLYPH"] = 68] = "MGLYPH";
    TAG_ID[TAG_ID["MI"] = 69] = "MI";
    TAG_ID[TAG_ID["MO"] = 70] = "MO";
    TAG_ID[TAG_ID["MN"] = 71] = "MN";
    TAG_ID[TAG_ID["MS"] = 72] = "MS";
    TAG_ID[TAG_ID["MTEXT"] = 73] = "MTEXT";
    TAG_ID[TAG_ID["NAV"] = 74] = "NAV";
    TAG_ID[TAG_ID["NOBR"] = 75] = "NOBR";
    TAG_ID[TAG_ID["NOFRAMES"] = 76] = "NOFRAMES";
    TAG_ID[TAG_ID["NOEMBED"] = 77] = "NOEMBED";
    TAG_ID[TAG_ID["NOSCRIPT"] = 78] = "NOSCRIPT";
    TAG_ID[TAG_ID["OBJECT"] = 79] = "OBJECT";
    TAG_ID[TAG_ID["OL"] = 80] = "OL";
    TAG_ID[TAG_ID["OPTGROUP"] = 81] = "OPTGROUP";
    TAG_ID[TAG_ID["OPTION"] = 82] = "OPTION";
    TAG_ID[TAG_ID["P"] = 83] = "P";
    TAG_ID[TAG_ID["PARAM"] = 84] = "PARAM";
    TAG_ID[TAG_ID["PLAINTEXT"] = 85] = "PLAINTEXT";
    TAG_ID[TAG_ID["PRE"] = 86] = "PRE";
    TAG_ID[TAG_ID["RB"] = 87] = "RB";
    TAG_ID[TAG_ID["RP"] = 88] = "RP";
    TAG_ID[TAG_ID["RT"] = 89] = "RT";
    TAG_ID[TAG_ID["RTC"] = 90] = "RTC";
    TAG_ID[TAG_ID["RUBY"] = 91] = "RUBY";
    TAG_ID[TAG_ID["S"] = 92] = "S";
    TAG_ID[TAG_ID["SCRIPT"] = 93] = "SCRIPT";
    TAG_ID[TAG_ID["SEARCH"] = 94] = "SEARCH";
    TAG_ID[TAG_ID["SECTION"] = 95] = "SECTION";
    TAG_ID[TAG_ID["SELECT"] = 96] = "SELECT";
    TAG_ID[TAG_ID["SOURCE"] = 97] = "SOURCE";
    TAG_ID[TAG_ID["SMALL"] = 98] = "SMALL";
    TAG_ID[TAG_ID["SPAN"] = 99] = "SPAN";
    TAG_ID[TAG_ID["STRIKE"] = 100] = "STRIKE";
    TAG_ID[TAG_ID["STRONG"] = 101] = "STRONG";
    TAG_ID[TAG_ID["STYLE"] = 102] = "STYLE";
    TAG_ID[TAG_ID["SUB"] = 103] = "SUB";
    TAG_ID[TAG_ID["SUMMARY"] = 104] = "SUMMARY";
    TAG_ID[TAG_ID["SUP"] = 105] = "SUP";
    TAG_ID[TAG_ID["TABLE"] = 106] = "TABLE";
    TAG_ID[TAG_ID["TBODY"] = 107] = "TBODY";
    TAG_ID[TAG_ID["TEMPLATE"] = 108] = "TEMPLATE";
    TAG_ID[TAG_ID["TEXTAREA"] = 109] = "TEXTAREA";
    TAG_ID[TAG_ID["TFOOT"] = 110] = "TFOOT";
    TAG_ID[TAG_ID["TD"] = 111] = "TD";
    TAG_ID[TAG_ID["TH"] = 112] = "TH";
    TAG_ID[TAG_ID["THEAD"] = 113] = "THEAD";
    TAG_ID[TAG_ID["TITLE"] = 114] = "TITLE";
    TAG_ID[TAG_ID["TR"] = 115] = "TR";
    TAG_ID[TAG_ID["TRACK"] = 116] = "TRACK";
    TAG_ID[TAG_ID["TT"] = 117] = "TT";
    TAG_ID[TAG_ID["U"] = 118] = "U";
    TAG_ID[TAG_ID["UL"] = 119] = "UL";
    TAG_ID[TAG_ID["SVG"] = 120] = "SVG";
    TAG_ID[TAG_ID["VAR"] = 121] = "VAR";
    TAG_ID[TAG_ID["WBR"] = 122] = "WBR";
    TAG_ID[TAG_ID["XMP"] = 123] = "XMP";
})(TAG_ID || (TAG_ID = {}));
const TAG_NAME_TO_ID = new Map([
    [TAG_NAMES.A, TAG_ID.A],
    [TAG_NAMES.ADDRESS, TAG_ID.ADDRESS],
    [TAG_NAMES.ANNOTATION_XML, TAG_ID.ANNOTATION_XML],
    [TAG_NAMES.APPLET, TAG_ID.APPLET],
    [TAG_NAMES.AREA, TAG_ID.AREA],
    [TAG_NAMES.ARTICLE, TAG_ID.ARTICLE],
    [TAG_NAMES.ASIDE, TAG_ID.ASIDE],
    [TAG_NAMES.B, TAG_ID.B],
    [TAG_NAMES.BASE, TAG_ID.BASE],
    [TAG_NAMES.BASEFONT, TAG_ID.BASEFONT],
    [TAG_NAMES.BGSOUND, TAG_ID.BGSOUND],
    [TAG_NAMES.BIG, TAG_ID.BIG],
    [TAG_NAMES.BLOCKQUOTE, TAG_ID.BLOCKQUOTE],
    [TAG_NAMES.BODY, TAG_ID.BODY],
    [TAG_NAMES.BR, TAG_ID.BR],
    [TAG_NAMES.BUTTON, TAG_ID.BUTTON],
    [TAG_NAMES.CAPTION, TAG_ID.CAPTION],
    [TAG_NAMES.CENTER, TAG_ID.CENTER],
    [TAG_NAMES.CODE, TAG_ID.CODE],
    [TAG_NAMES.COL, TAG_ID.COL],
    [TAG_NAMES.COLGROUP, TAG_ID.COLGROUP],
    [TAG_NAMES.DD, TAG_ID.DD],
    [TAG_NAMES.DESC, TAG_ID.DESC],
    [TAG_NAMES.DETAILS, TAG_ID.DETAILS],
    [TAG_NAMES.DIALOG, TAG_ID.DIALOG],
    [TAG_NAMES.DIR, TAG_ID.DIR],
    [TAG_NAMES.DIV, TAG_ID.DIV],
    [TAG_NAMES.DL, TAG_ID.DL],
    [TAG_NAMES.DT, TAG_ID.DT],
    [TAG_NAMES.EM, TAG_ID.EM],
    [TAG_NAMES.EMBED, TAG_ID.EMBED],
    [TAG_NAMES.FIELDSET, TAG_ID.FIELDSET],
    [TAG_NAMES.FIGCAPTION, TAG_ID.FIGCAPTION],
    [TAG_NAMES.FIGURE, TAG_ID.FIGURE],
    [TAG_NAMES.FONT, TAG_ID.FONT],
    [TAG_NAMES.FOOTER, TAG_ID.FOOTER],
    [TAG_NAMES.FOREIGN_OBJECT, TAG_ID.FOREIGN_OBJECT],
    [TAG_NAMES.FORM, TAG_ID.FORM],
    [TAG_NAMES.FRAME, TAG_ID.FRAME],
    [TAG_NAMES.FRAMESET, TAG_ID.FRAMESET],
    [TAG_NAMES.H1, TAG_ID.H1],
    [TAG_NAMES.H2, TAG_ID.H2],
    [TAG_NAMES.H3, TAG_ID.H3],
    [TAG_NAMES.H4, TAG_ID.H4],
    [TAG_NAMES.H5, TAG_ID.H5],
    [TAG_NAMES.H6, TAG_ID.H6],
    [TAG_NAMES.HEAD, TAG_ID.HEAD],
    [TAG_NAMES.HEADER, TAG_ID.HEADER],
    [TAG_NAMES.HGROUP, TAG_ID.HGROUP],
    [TAG_NAMES.HR, TAG_ID.HR],
    [TAG_NAMES.HTML, TAG_ID.HTML],
    [TAG_NAMES.I, TAG_ID.I],
    [TAG_NAMES.IMG, TAG_ID.IMG],
    [TAG_NAMES.IMAGE, TAG_ID.IMAGE],
    [TAG_NAMES.INPUT, TAG_ID.INPUT],
    [TAG_NAMES.IFRAME, TAG_ID.IFRAME],
    [TAG_NAMES.KEYGEN, TAG_ID.KEYGEN],
    [TAG_NAMES.LABEL, TAG_ID.LABEL],
    [TAG_NAMES.LI, TAG_ID.LI],
    [TAG_NAMES.LINK, TAG_ID.LINK],
    [TAG_NAMES.LISTING, TAG_ID.LISTING],
    [TAG_NAMES.MAIN, TAG_ID.MAIN],
    [TAG_NAMES.MALIGNMARK, TAG_ID.MALIGNMARK],
    [TAG_NAMES.MARQUEE, TAG_ID.MARQUEE],
    [TAG_NAMES.MATH, TAG_ID.MATH],
    [TAG_NAMES.MENU, TAG_ID.MENU],
    [TAG_NAMES.META, TAG_ID.META],
    [TAG_NAMES.MGLYPH, TAG_ID.MGLYPH],
    [TAG_NAMES.MI, TAG_ID.MI],
    [TAG_NAMES.MO, TAG_ID.MO],
    [TAG_NAMES.MN, TAG_ID.MN],
    [TAG_NAMES.MS, TAG_ID.MS],
    [TAG_NAMES.MTEXT, TAG_ID.MTEXT],
    [TAG_NAMES.NAV, TAG_ID.NAV],
    [TAG_NAMES.NOBR, TAG_ID.NOBR],
    [TAG_NAMES.NOFRAMES, TAG_ID.NOFRAMES],
    [TAG_NAMES.NOEMBED, TAG_ID.NOEMBED],
    [TAG_NAMES.NOSCRIPT, TAG_ID.NOSCRIPT],
    [TAG_NAMES.OBJECT, TAG_ID.OBJECT],
    [TAG_NAMES.OL, TAG_ID.OL],
    [TAG_NAMES.OPTGROUP, TAG_ID.OPTGROUP],
    [TAG_NAMES.OPTION, TAG_ID.OPTION],
    [TAG_NAMES.P, TAG_ID.P],
    [TAG_NAMES.PARAM, TAG_ID.PARAM],
    [TAG_NAMES.PLAINTEXT, TAG_ID.PLAINTEXT],
    [TAG_NAMES.PRE, TAG_ID.PRE],
    [TAG_NAMES.RB, TAG_ID.RB],
    [TAG_NAMES.RP, TAG_ID.RP],
    [TAG_NAMES.RT, TAG_ID.RT],
    [TAG_NAMES.RTC, TAG_ID.RTC],
    [TAG_NAMES.RUBY, TAG_ID.RUBY],
    [TAG_NAMES.S, TAG_ID.S],
    [TAG_NAMES.SCRIPT, TAG_ID.SCRIPT],
    [TAG_NAMES.SEARCH, TAG_ID.SEARCH],
    [TAG_NAMES.SECTION, TAG_ID.SECTION],
    [TAG_NAMES.SELECT, TAG_ID.SELECT],
    [TAG_NAMES.SOURCE, TAG_ID.SOURCE],
    [TAG_NAMES.SMALL, TAG_ID.SMALL],
    [TAG_NAMES.SPAN, TAG_ID.SPAN],
    [TAG_NAMES.STRIKE, TAG_ID.STRIKE],
    [TAG_NAMES.STRONG, TAG_ID.STRONG],
    [TAG_NAMES.STYLE, TAG_ID.STYLE],
    [TAG_NAMES.SUB, TAG_ID.SUB],
    [TAG_NAMES.SUMMARY, TAG_ID.SUMMARY],
    [TAG_NAMES.SUP, TAG_ID.SUP],
    [TAG_NAMES.TABLE, TAG_ID.TABLE],
    [TAG_NAMES.TBODY, TAG_ID.TBODY],
    [TAG_NAMES.TEMPLATE, TAG_ID.TEMPLATE],
    [TAG_NAMES.TEXTAREA, TAG_ID.TEXTAREA],
    [TAG_NAMES.TFOOT, TAG_ID.TFOOT],
    [TAG_NAMES.TD, TAG_ID.TD],
    [TAG_NAMES.TH, TAG_ID.TH],
    [TAG_NAMES.THEAD, TAG_ID.THEAD],
    [TAG_NAMES.TITLE, TAG_ID.TITLE],
    [TAG_NAMES.TR, TAG_ID.TR],
    [TAG_NAMES.TRACK, TAG_ID.TRACK],
    [TAG_NAMES.TT, TAG_ID.TT],
    [TAG_NAMES.U, TAG_ID.U],
    [TAG_NAMES.UL, TAG_ID.UL],
    [TAG_NAMES.SVG, TAG_ID.SVG],
    [TAG_NAMES.VAR, TAG_ID.VAR],
    [TAG_NAMES.WBR, TAG_ID.WBR],
    [TAG_NAMES.XMP, TAG_ID.XMP],
]);
function getTagID(tagName) {
    var _a;
    return (_a = TAG_NAME_TO_ID.get(tagName)) !== null && _a !== void 0 ? _a : TAG_ID.UNKNOWN;
}
const $ = TAG_ID;
const SPECIAL_ELEMENTS = {
    [NS.HTML]: new Set([
        $.ADDRESS,
        $.APPLET,
        $.AREA,
        $.ARTICLE,
        $.ASIDE,
        $.BASE,
        $.BASEFONT,
        $.BGSOUND,
        $.BLOCKQUOTE,
        $.BODY,
        $.BR,
        $.BUTTON,
        $.CAPTION,
        $.CENTER,
        $.COL,
        $.COLGROUP,
        $.DD,
        $.DETAILS,
        $.DIR,
        $.DIV,
        $.DL,
        $.DT,
        $.EMBED,
        $.FIELDSET,
        $.FIGCAPTION,
        $.FIGURE,
        $.FOOTER,
        $.FORM,
        $.FRAME,
        $.FRAMESET,
        $.H1,
        $.H2,
        $.H3,
        $.H4,
        $.H5,
        $.H6,
        $.HEAD,
        $.HEADER,
        $.HGROUP,
        $.HR,
        $.HTML,
        $.IFRAME,
        $.IMG,
        $.INPUT,
        $.LI,
        $.LINK,
        $.LISTING,
        $.MAIN,
        $.MARQUEE,
        $.MENU,
        $.META,
        $.NAV,
        $.NOEMBED,
        $.NOFRAMES,
        $.NOSCRIPT,
        $.OBJECT,
        $.OL,
        $.P,
        $.PARAM,
        $.PLAINTEXT,
        $.PRE,
        $.SCRIPT,
        $.SECTION,
        $.SELECT,
        $.SOURCE,
        $.STYLE,
        $.SUMMARY,
        $.TABLE,
        $.TBODY,
        $.TD,
        $.TEMPLATE,
        $.TEXTAREA,
        $.TFOOT,
        $.TH,
        $.THEAD,
        $.TITLE,
        $.TR,
        $.TRACK,
        $.UL,
        $.WBR,
        $.XMP,
    ]),
    [NS.MATHML]: new Set([$.MI, $.MO, $.MN, $.MS, $.MTEXT, $.ANNOTATION_XML]),
    [NS.SVG]: new Set([$.TITLE, $.FOREIGN_OBJECT, $.DESC]),
    [NS.XLINK]: new Set(),
    [NS.XML]: new Set(),
    [NS.XMLNS]: new Set(),
};
const NUMBERED_HEADERS = new Set([$.H1, $.H2, $.H3, $.H4, $.H5, $.H6]);

//States
var State;
(function (State) {
    State[State["DATA"] = 0] = "DATA";
    State[State["RCDATA"] = 1] = "RCDATA";
    State[State["RAWTEXT"] = 2] = "RAWTEXT";
    State[State["SCRIPT_DATA"] = 3] = "SCRIPT_DATA";
    State[State["PLAINTEXT"] = 4] = "PLAINTEXT";
    State[State["TAG_OPEN"] = 5] = "TAG_OPEN";
    State[State["END_TAG_OPEN"] = 6] = "END_TAG_OPEN";
    State[State["TAG_NAME"] = 7] = "TAG_NAME";
    State[State["RCDATA_LESS_THAN_SIGN"] = 8] = "RCDATA_LESS_THAN_SIGN";
    State[State["RCDATA_END_TAG_OPEN"] = 9] = "RCDATA_END_TAG_OPEN";
    State[State["RCDATA_END_TAG_NAME"] = 10] = "RCDATA_END_TAG_NAME";
    State[State["RAWTEXT_LESS_THAN_SIGN"] = 11] = "RAWTEXT_LESS_THAN_SIGN";
    State[State["RAWTEXT_END_TAG_OPEN"] = 12] = "RAWTEXT_END_TAG_OPEN";
    State[State["RAWTEXT_END_TAG_NAME"] = 13] = "RAWTEXT_END_TAG_NAME";
    State[State["SCRIPT_DATA_LESS_THAN_SIGN"] = 14] = "SCRIPT_DATA_LESS_THAN_SIGN";
    State[State["SCRIPT_DATA_END_TAG_OPEN"] = 15] = "SCRIPT_DATA_END_TAG_OPEN";
    State[State["SCRIPT_DATA_END_TAG_NAME"] = 16] = "SCRIPT_DATA_END_TAG_NAME";
    State[State["SCRIPT_DATA_ESCAPE_START"] = 17] = "SCRIPT_DATA_ESCAPE_START";
    State[State["SCRIPT_DATA_ESCAPE_START_DASH"] = 18] = "SCRIPT_DATA_ESCAPE_START_DASH";
    State[State["SCRIPT_DATA_ESCAPED"] = 19] = "SCRIPT_DATA_ESCAPED";
    State[State["SCRIPT_DATA_ESCAPED_DASH"] = 20] = "SCRIPT_DATA_ESCAPED_DASH";
    State[State["SCRIPT_DATA_ESCAPED_DASH_DASH"] = 21] = "SCRIPT_DATA_ESCAPED_DASH_DASH";
    State[State["SCRIPT_DATA_ESCAPED_LESS_THAN_SIGN"] = 22] = "SCRIPT_DATA_ESCAPED_LESS_THAN_SIGN";
    State[State["SCRIPT_DATA_ESCAPED_END_TAG_OPEN"] = 23] = "SCRIPT_DATA_ESCAPED_END_TAG_OPEN";
    State[State["SCRIPT_DATA_ESCAPED_END_TAG_NAME"] = 24] = "SCRIPT_DATA_ESCAPED_END_TAG_NAME";
    State[State["SCRIPT_DATA_DOUBLE_ESCAPE_START"] = 25] = "SCRIPT_DATA_DOUBLE_ESCAPE_START";
    State[State["SCRIPT_DATA_DOUBLE_ESCAPED"] = 26] = "SCRIPT_DATA_DOUBLE_ESCAPED";
    State[State["SCRIPT_DATA_DOUBLE_ESCAPED_DASH"] = 27] = "SCRIPT_DATA_DOUBLE_ESCAPED_DASH";
    State[State["SCRIPT_DATA_DOUBLE_ESCAPED_DASH_DASH"] = 28] = "SCRIPT_DATA_DOUBLE_ESCAPED_DASH_DASH";
    State[State["SCRIPT_DATA_DOUBLE_ESCAPED_LESS_THAN_SIGN"] = 29] = "SCRIPT_DATA_DOUBLE_ESCAPED_LESS_THAN_SIGN";
    State[State["SCRIPT_DATA_DOUBLE_ESCAPE_END"] = 30] = "SCRIPT_DATA_DOUBLE_ESCAPE_END";
    State[State["BEFORE_ATTRIBUTE_NAME"] = 31] = "BEFORE_ATTRIBUTE_NAME";
    State[State["ATTRIBUTE_NAME"] = 32] = "ATTRIBUTE_NAME";
    State[State["AFTER_ATTRIBUTE_NAME"] = 33] = "AFTER_ATTRIBUTE_NAME";
    State[State["BEFORE_ATTRIBUTE_VALUE"] = 34] = "BEFORE_ATTRIBUTE_VALUE";
    State[State["ATTRIBUTE_VALUE_DOUBLE_QUOTED"] = 35] = "ATTRIBUTE_VALUE_DOUBLE_QUOTED";
    State[State["ATTRIBUTE_VALUE_SINGLE_QUOTED"] = 36] = "ATTRIBUTE_VALUE_SINGLE_QUOTED";
    State[State["ATTRIBUTE_VALUE_UNQUOTED"] = 37] = "ATTRIBUTE_VALUE_UNQUOTED";
    State[State["AFTER_ATTRIBUTE_VALUE_QUOTED"] = 38] = "AFTER_ATTRIBUTE_VALUE_QUOTED";
    State[State["SELF_CLOSING_START_TAG"] = 39] = "SELF_CLOSING_START_TAG";
    State[State["BOGUS_COMMENT"] = 40] = "BOGUS_COMMENT";
    State[State["MARKUP_DECLARATION_OPEN"] = 41] = "MARKUP_DECLARATION_OPEN";
    State[State["COMMENT_START"] = 42] = "COMMENT_START";
    State[State["COMMENT_START_DASH"] = 43] = "COMMENT_START_DASH";
    State[State["COMMENT"] = 44] = "COMMENT";
    State[State["COMMENT_LESS_THAN_SIGN"] = 45] = "COMMENT_LESS_THAN_SIGN";
    State[State["COMMENT_LESS_THAN_SIGN_BANG"] = 46] = "COMMENT_LESS_THAN_SIGN_BANG";
    State[State["COMMENT_LESS_THAN_SIGN_BANG_DASH"] = 47] = "COMMENT_LESS_THAN_SIGN_BANG_DASH";
    State[State["COMMENT_LESS_THAN_SIGN_BANG_DASH_DASH"] = 48] = "COMMENT_LESS_THAN_SIGN_BANG_DASH_DASH";
    State[State["COMMENT_END_DASH"] = 49] = "COMMENT_END_DASH";
    State[State["COMMENT_END"] = 50] = "COMMENT_END";
    State[State["COMMENT_END_BANG"] = 51] = "COMMENT_END_BANG";
    State[State["DOCTYPE"] = 52] = "DOCTYPE";
    State[State["BEFORE_DOCTYPE_NAME"] = 53] = "BEFORE_DOCTYPE_NAME";
    State[State["DOCTYPE_NAME"] = 54] = "DOCTYPE_NAME";
    State[State["AFTER_DOCTYPE_NAME"] = 55] = "AFTER_DOCTYPE_NAME";
    State[State["AFTER_DOCTYPE_PUBLIC_KEYWORD"] = 56] = "AFTER_DOCTYPE_PUBLIC_KEYWORD";
    State[State["BEFORE_DOCTYPE_PUBLIC_IDENTIFIER"] = 57] = "BEFORE_DOCTYPE_PUBLIC_IDENTIFIER";
    State[State["DOCTYPE_PUBLIC_IDENTIFIER_DOUBLE_QUOTED"] = 58] = "DOCTYPE_PUBLIC_IDENTIFIER_DOUBLE_QUOTED";
    State[State["DOCTYPE_PUBLIC_IDENTIFIER_SINGLE_QUOTED"] = 59] = "DOCTYPE_PUBLIC_IDENTIFIER_SINGLE_QUOTED";
    State[State["AFTER_DOCTYPE_PUBLIC_IDENTIFIER"] = 60] = "AFTER_DOCTYPE_PUBLIC_IDENTIFIER";
    State[State["BETWEEN_DOCTYPE_PUBLIC_AND_SYSTEM_IDENTIFIERS"] = 61] = "BETWEEN_DOCTYPE_PUBLIC_AND_SYSTEM_IDENTIFIERS";
    State[State["AFTER_DOCTYPE_SYSTEM_KEYWORD"] = 62] = "AFTER_DOCTYPE_SYSTEM_KEYWORD";
    State[State["BEFORE_DOCTYPE_SYSTEM_IDENTIFIER"] = 63] = "BEFORE_DOCTYPE_SYSTEM_IDENTIFIER";
    State[State["DOCTYPE_SYSTEM_IDENTIFIER_DOUBLE_QUOTED"] = 64] = "DOCTYPE_SYSTEM_IDENTIFIER_DOUBLE_QUOTED";
    State[State["DOCTYPE_SYSTEM_IDENTIFIER_SINGLE_QUOTED"] = 65] = "DOCTYPE_SYSTEM_IDENTIFIER_SINGLE_QUOTED";
    State[State["AFTER_DOCTYPE_SYSTEM_IDENTIFIER"] = 66] = "AFTER_DOCTYPE_SYSTEM_IDENTIFIER";
    State[State["BOGUS_DOCTYPE"] = 67] = "BOGUS_DOCTYPE";
    State[State["CDATA_SECTION"] = 68] = "CDATA_SECTION";
    State[State["CDATA_SECTION_BRACKET"] = 69] = "CDATA_SECTION_BRACKET";
    State[State["CDATA_SECTION_END"] = 70] = "CDATA_SECTION_END";
    State[State["CHARACTER_REFERENCE"] = 71] = "CHARACTER_REFERENCE";
    State[State["AMBIGUOUS_AMPERSAND"] = 72] = "AMBIGUOUS_AMPERSAND";
})(State || (State = {}));
//Tokenizer initial states for different modes
const TokenizerMode = {
    DATA: State.DATA,
    RCDATA: State.RCDATA,
    RAWTEXT: State.RAWTEXT,
    SCRIPT_DATA: State.SCRIPT_DATA,
    PLAINTEXT: State.PLAINTEXT,
    CDATA_SECTION: State.CDATA_SECTION,
};
//Utils
//OPTIMIZATION: these utility functions should not be moved out of this module. V8 Crankshaft will not inline
//this functions if they will be situated in another module due to context switch.
//Always perform inlining check before modifying this functions ('node --trace-inlining').
function isAsciiDigit(cp) {
    return cp >= CODE_POINTS.DIGIT_0 && cp <= CODE_POINTS.DIGIT_9;
}
function isAsciiUpper(cp) {
    return cp >= CODE_POINTS.LATIN_CAPITAL_A && cp <= CODE_POINTS.LATIN_CAPITAL_Z;
}
function isAsciiLower(cp) {
    return cp >= CODE_POINTS.LATIN_SMALL_A && cp <= CODE_POINTS.LATIN_SMALL_Z;
}
function isAsciiLetter(cp) {
    return isAsciiLower(cp) || isAsciiUpper(cp);
}
function isAsciiAlphaNumeric(cp) {
    return isAsciiLetter(cp) || isAsciiDigit(cp);
}
function toAsciiLower(cp) {
    return cp + 32;
}
function isWhitespace(cp) {
    return cp === CODE_POINTS.SPACE || cp === CODE_POINTS.LINE_FEED || cp === CODE_POINTS.TABULATION || cp === CODE_POINTS.FORM_FEED;
}
function isScriptDataDoubleEscapeSequenceEnd(cp) {
    return isWhitespace(cp) || cp === CODE_POINTS.SOLIDUS || cp === CODE_POINTS.GREATER_THAN_SIGN;
}
function getErrorForNumericCharacterReference(code) {
    if (code === CODE_POINTS.NULL) {
        return ERR.nullCharacterReference;
    }
    else if (code > 1114111) {
        return ERR.characterReferenceOutsideUnicodeRange;
    }
    else if (isSurrogate(code)) {
        return ERR.surrogateCharacterReference;
    }
    else if (isUndefinedCodePoint(code)) {
        return ERR.noncharacterCharacterReference;
    }
    else if (isControlCodePoint(code) || code === CODE_POINTS.CARRIAGE_RETURN) {
        return ERR.controlCharacterReference;
    }
    return null;
}
//Tokenizer
class Tokenizer {
    constructor(options, handler) {
        this.options = options;
        this.handler = handler;
        this.paused = false;
        /** Ensures that the parsing loop isn't run multiple times at once. */
        this.inLoop = false;
        /**
         * Indicates that the current adjusted node exists, is not an element in the HTML namespace,
         * and that it is not an integration point for either MathML or HTML.
         *
         * @see {@link https://html.spec.whatwg.org/multipage/parsing.html#tree-construction}
         */
        this.inForeignNode = false;
        this.lastStartTagName = '';
        this.active = false;
        this.state = State.DATA;
        this.returnState = State.DATA;
        this.entityStartPos = 0;
        this.consumedAfterSnapshot = -1;
        this.currentCharacterToken = null;
        this.currentToken = null;
        this.currentAttr = { name: '', value: '' };
        this.preprocessor = new Preprocessor(handler);
        this.currentLocation = this.getCurrentLocation(-1);
        this.entityDecoder = new EntityDecoder(htmlDecodeTree, (cp, consumed) => {
            // Note: Set `pos` _before_ flushing, as flushing might drop
            // the current chunk and invalidate `entityStartPos`.
            this.preprocessor.pos = this.entityStartPos + consumed - 1;
            this._flushCodePointConsumedAsCharacterReference(cp);
        }, handler.onParseError
            ? {
                missingSemicolonAfterCharacterReference: () => {
                    this._err(ERR.missingSemicolonAfterCharacterReference, 1);
                },
                absenceOfDigitsInNumericCharacterReference: (consumed) => {
                    this._err(ERR.absenceOfDigitsInNumericCharacterReference, this.entityStartPos - this.preprocessor.pos + consumed);
                },
                validateNumericCharacterReference: (code) => {
                    const error = getErrorForNumericCharacterReference(code);
                    if (error)
                        this._err(error, 1);
                },
            }
            : undefined);
    }
    //Errors
    _err(code, cpOffset = 0) {
        var _a, _b;
        (_b = (_a = this.handler).onParseError) === null || _b === void 0 ? void 0 : _b.call(_a, this.preprocessor.getError(code, cpOffset));
    }
    // NOTE: `offset` may never run across line boundaries.
    getCurrentLocation(offset) {
        if (!this.options.sourceCodeLocationInfo) {
            return null;
        }
        return {
            startLine: this.preprocessor.line,
            startCol: this.preprocessor.col - offset,
            startOffset: this.preprocessor.offset - offset,
            endLine: -1,
            endCol: -1,
            endOffset: -1,
        };
    }
    _runParsingLoop() {
        if (this.inLoop)
            return;
        this.inLoop = true;
        while (this.active && !this.paused) {
            this.consumedAfterSnapshot = 0;
            const cp = this._consume();
            if (!this._ensureHibernation()) {
                this._callState(cp);
            }
        }
        this.inLoop = false;
    }
    //API
    pause() {
        this.paused = true;
    }
    resume(writeCallback) {
        if (!this.paused) {
            throw new Error('Parser was already resumed');
        }
        this.paused = false;
        // Necessary for synchronous resume.
        if (this.inLoop)
            return;
        this._runParsingLoop();
        if (!this.paused) {
            writeCallback === null || writeCallback === void 0 ? void 0 : writeCallback();
        }
    }
    write(chunk, isLastChunk, writeCallback) {
        this.active = true;
        this.preprocessor.write(chunk, isLastChunk);
        this._runParsingLoop();
        if (!this.paused) {
            writeCallback === null || writeCallback === void 0 ? void 0 : writeCallback();
        }
    }
    insertHtmlAtCurrentPos(chunk) {
        this.active = true;
        this.preprocessor.insertHtmlAtCurrentPos(chunk);
        this._runParsingLoop();
    }
    //Hibernation
    _ensureHibernation() {
        if (this.preprocessor.endOfChunkHit) {
            this.preprocessor.retreat(this.consumedAfterSnapshot);
            this.consumedAfterSnapshot = 0;
            this.active = false;
            return true;
        }
        return false;
    }
    //Consumption
    _consume() {
        this.consumedAfterSnapshot++;
        return this.preprocessor.advance();
    }
    _advanceBy(count) {
        this.consumedAfterSnapshot += count;
        for (let i = 0; i < count; i++) {
            this.preprocessor.advance();
        }
    }
    _consumeSequenceIfMatch(pattern, caseSensitive) {
        if (this.preprocessor.startsWith(pattern, caseSensitive)) {
            // We will already have consumed one character before calling this method.
            this._advanceBy(pattern.length - 1);
            return true;
        }
        return false;
    }
    //Token creation
    _createStartTagToken() {
        this.currentToken = {
            type: TokenType.START_TAG,
            tagName: '',
            tagID: TAG_ID.UNKNOWN,
            selfClosing: false,
            ackSelfClosing: false,
            attrs: [],
            location: this.getCurrentLocation(1),
        };
    }
    _createEndTagToken() {
        this.currentToken = {
            type: TokenType.END_TAG,
            tagName: '',
            tagID: TAG_ID.UNKNOWN,
            selfClosing: false,
            ackSelfClosing: false,
            attrs: [],
            location: this.getCurrentLocation(2),
        };
    }
    _createCommentToken(offset) {
        this.currentToken = {
            type: TokenType.COMMENT,
            data: '',
            location: this.getCurrentLocation(offset),
        };
    }
    _createDoctypeToken(initialName) {
        this.currentToken = {
            type: TokenType.DOCTYPE,
            name: initialName,
            forceQuirks: false,
            publicId: null,
            systemId: null,
            location: this.currentLocation,
        };
    }
    _createCharacterToken(type, chars) {
        this.currentCharacterToken = {
            type,
            chars,
            location: this.currentLocation,
        };
    }
    //Tag attributes
    _createAttr(attrNameFirstCh) {
        this.currentAttr = {
            name: attrNameFirstCh,
            value: '',
        };
        this.currentLocation = this.getCurrentLocation(0);
    }
    _leaveAttrName() {
        var _a;
        var _b;
        const token = this.currentToken;
        if (getTokenAttr(token, this.currentAttr.name) === null) {
            token.attrs.push(this.currentAttr);
            if (token.location && this.currentLocation) {
                const attrLocations = ((_a = (_b = token.location).attrs) !== null && _a !== void 0 ? _a : (_b.attrs = Object.create(null)));
                attrLocations[this.currentAttr.name] = this.currentLocation;
                // Set end location
                this._leaveAttrValue();
            }
        }
        else {
            this._err(ERR.duplicateAttribute);
        }
    }
    _leaveAttrValue() {
        if (this.currentLocation) {
            this.currentLocation.endLine = this.preprocessor.line;
            this.currentLocation.endCol = this.preprocessor.col;
            this.currentLocation.endOffset = this.preprocessor.offset;
        }
    }
    //Token emission
    prepareToken(ct) {
        this._emitCurrentCharacterToken(ct.location);
        this.currentToken = null;
        if (ct.location) {
            ct.location.endLine = this.preprocessor.line;
            ct.location.endCol = this.preprocessor.col + 1;
            ct.location.endOffset = this.preprocessor.offset + 1;
        }
        this.currentLocation = this.getCurrentLocation(-1);
    }
    emitCurrentTagToken() {
        const ct = this.currentToken;
        this.prepareToken(ct);
        ct.tagID = getTagID(ct.tagName);
        if (ct.type === TokenType.START_TAG) {
            this.lastStartTagName = ct.tagName;
            this.handler.onStartTag(ct);
        }
        else {
            if (ct.attrs.length > 0) {
                this._err(ERR.endTagWithAttributes);
            }
            if (ct.selfClosing) {
                this._err(ERR.endTagWithTrailingSolidus);
            }
            this.handler.onEndTag(ct);
        }
        this.preprocessor.dropParsedChunk();
    }
    emitCurrentComment(ct) {
        this.prepareToken(ct);
        this.handler.onComment(ct);
        this.preprocessor.dropParsedChunk();
    }
    emitCurrentDoctype(ct) {
        this.prepareToken(ct);
        this.handler.onDoctype(ct);
        this.preprocessor.dropParsedChunk();
    }
    _emitCurrentCharacterToken(nextLocation) {
        if (this.currentCharacterToken) {
            //NOTE: if we have a pending character token, make it's end location equal to the
            //current token's start location.
            if (nextLocation && this.currentCharacterToken.location) {
                this.currentCharacterToken.location.endLine = nextLocation.startLine;
                this.currentCharacterToken.location.endCol = nextLocation.startCol;
                this.currentCharacterToken.location.endOffset = nextLocation.startOffset;
            }
            switch (this.currentCharacterToken.type) {
                case TokenType.CHARACTER: {
                    this.handler.onCharacter(this.currentCharacterToken);
                    break;
                }
                case TokenType.NULL_CHARACTER: {
                    this.handler.onNullCharacter(this.currentCharacterToken);
                    break;
                }
                case TokenType.WHITESPACE_CHARACTER: {
                    this.handler.onWhitespaceCharacter(this.currentCharacterToken);
                    break;
                }
            }
            this.currentCharacterToken = null;
        }
    }
    _emitEOFToken() {
        const location = this.getCurrentLocation(0);
        if (location) {
            location.endLine = location.startLine;
            location.endCol = location.startCol;
            location.endOffset = location.startOffset;
        }
        this._emitCurrentCharacterToken(location);
        this.handler.onEof({ type: TokenType.EOF, location });
        this.active = false;
    }
    //Characters emission
    //OPTIMIZATION: The specification uses only one type of character token (one token per character).
    //This causes a huge memory overhead and a lot of unnecessary parser loops. parse5 uses 3 groups of characters.
    //If we have a sequence of characters that belong to the same group, the parser can process it
    //as a single solid character token.
    //So, there are 3 types of character tokens in parse5:
    //1)TokenType.NULL_CHARACTER - \u0000-character sequences (e.g. '\u0000\u0000\u0000')
    //2)TokenType.WHITESPACE_CHARACTER - any whitespace/new-line character sequences (e.g. '\n  \r\t   \f')
    //3)TokenType.CHARACTER - any character sequence which don't belong to groups 1 and 2 (e.g. 'abcdef1234@@#$%^')
    _appendCharToCurrentCharacterToken(type, ch) {
        if (this.currentCharacterToken) {
            if (this.currentCharacterToken.type === type) {
                this.currentCharacterToken.chars += ch;
                return;
            }
            else {
                this.currentLocation = this.getCurrentLocation(0);
                this._emitCurrentCharacterToken(this.currentLocation);
                this.preprocessor.dropParsedChunk();
            }
        }
        this._createCharacterToken(type, ch);
    }
    _emitCodePoint(cp) {
        const type = isWhitespace(cp)
            ? TokenType.WHITESPACE_CHARACTER
            : cp === CODE_POINTS.NULL
                ? TokenType.NULL_CHARACTER
                : TokenType.CHARACTER;
        this._appendCharToCurrentCharacterToken(type, String.fromCodePoint(cp));
    }
    //NOTE: used when we emit characters explicitly.
    //This is always for non-whitespace and non-null characters, which allows us to avoid additional checks.
    _emitChars(ch) {
        this._appendCharToCurrentCharacterToken(TokenType.CHARACTER, ch);
    }
    // Character reference helpers
    _startCharacterReference() {
        this.returnState = this.state;
        this.state = State.CHARACTER_REFERENCE;
        this.entityStartPos = this.preprocessor.pos;
        this.entityDecoder.startEntity(this._isCharacterReferenceInAttribute() ? DecodingMode.Attribute : DecodingMode.Legacy);
    }
    _isCharacterReferenceInAttribute() {
        return (this.returnState === State.ATTRIBUTE_VALUE_DOUBLE_QUOTED ||
            this.returnState === State.ATTRIBUTE_VALUE_SINGLE_QUOTED ||
            this.returnState === State.ATTRIBUTE_VALUE_UNQUOTED);
    }
    _flushCodePointConsumedAsCharacterReference(cp) {
        if (this._isCharacterReferenceInAttribute()) {
            this.currentAttr.value += String.fromCodePoint(cp);
        }
        else {
            this._emitCodePoint(cp);
        }
    }
    // Calling states this way turns out to be much faster than any other approach.
    _callState(cp) {
        switch (this.state) {
            case State.DATA: {
                this._stateData(cp);
                break;
            }
            case State.RCDATA: {
                this._stateRcdata(cp);
                break;
            }
            case State.RAWTEXT: {
                this._stateRawtext(cp);
                break;
            }
            case State.SCRIPT_DATA: {
                this._stateScriptData(cp);
                break;
            }
            case State.PLAINTEXT: {
                this._statePlaintext(cp);
                break;
            }
            case State.TAG_OPEN: {
                this._stateTagOpen(cp);
                break;
            }
            case State.END_TAG_OPEN: {
                this._stateEndTagOpen(cp);
                break;
            }
            case State.TAG_NAME: {
                this._stateTagName(cp);
                break;
            }
            case State.RCDATA_LESS_THAN_SIGN: {
                this._stateRcdataLessThanSign(cp);
                break;
            }
            case State.RCDATA_END_TAG_OPEN: {
                this._stateRcdataEndTagOpen(cp);
                break;
            }
            case State.RCDATA_END_TAG_NAME: {
                this._stateRcdataEndTagName(cp);
                break;
            }
            case State.RAWTEXT_LESS_THAN_SIGN: {
                this._stateRawtextLessThanSign(cp);
                break;
            }
            case State.RAWTEXT_END_TAG_OPEN: {
                this._stateRawtextEndTagOpen(cp);
                break;
            }
            case State.RAWTEXT_END_TAG_NAME: {
                this._stateRawtextEndTagName(cp);
                break;
            }
            case State.SCRIPT_DATA_LESS_THAN_SIGN: {
                this._stateScriptDataLessThanSign(cp);
                break;
            }
            case State.SCRIPT_DATA_END_TAG_OPEN: {
                this._stateScriptDataEndTagOpen(cp);
                break;
            }
            case State.SCRIPT_DATA_END_TAG_NAME: {
                this._stateScriptDataEndTagName(cp);
                break;
            }
            case State.SCRIPT_DATA_ESCAPE_START: {
                this._stateScriptDataEscapeStart(cp);
                break;
            }
            case State.SCRIPT_DATA_ESCAPE_START_DASH: {
                this._stateScriptDataEscapeStartDash(cp);
                break;
            }
            case State.SCRIPT_DATA_ESCAPED: {
                this._stateScriptDataEscaped(cp);
                break;
            }
            case State.SCRIPT_DATA_ESCAPED_DASH: {
                this._stateScriptDataEscapedDash(cp);
                break;
            }
            case State.SCRIPT_DATA_ESCAPED_DASH_DASH: {
                this._stateScriptDataEscapedDashDash(cp);
                break;
            }
            case State.SCRIPT_DATA_ESCAPED_LESS_THAN_SIGN: {
                this._stateScriptDataEscapedLessThanSign(cp);
                break;
            }
            case State.SCRIPT_DATA_ESCAPED_END_TAG_OPEN: {
                this._stateScriptDataEscapedEndTagOpen(cp);
                break;
            }
            case State.SCRIPT_DATA_ESCAPED_END_TAG_NAME: {
                this._stateScriptDataEscapedEndTagName(cp);
                break;
            }
            case State.SCRIPT_DATA_DOUBLE_ESCAPE_START: {
                this._stateScriptDataDoubleEscapeStart(cp);
                break;
            }
            case State.SCRIPT_DATA_DOUBLE_ESCAPED: {
                this._stateScriptDataDoubleEscaped(cp);
                break;
            }
            case State.SCRIPT_DATA_DOUBLE_ESCAPED_DASH: {
                this._stateScriptDataDoubleEscapedDash(cp);
                break;
            }
            case State.SCRIPT_DATA_DOUBLE_ESCAPED_DASH_DASH: {
                this._stateScriptDataDoubleEscapedDashDash(cp);
                break;
            }
            case State.SCRIPT_DATA_DOUBLE_ESCAPED_LESS_THAN_SIGN: {
                this._stateScriptDataDoubleEscapedLessThanSign(cp);
                break;
            }
            case State.SCRIPT_DATA_DOUBLE_ESCAPE_END: {
                this._stateScriptDataDoubleEscapeEnd(cp);
                break;
            }
            case State.BEFORE_ATTRIBUTE_NAME: {
                this._stateBeforeAttributeName(cp);
                break;
            }
            case State.ATTRIBUTE_NAME: {
                this._stateAttributeName(cp);
                break;
            }
            case State.AFTER_ATTRIBUTE_NAME: {
                this._stateAfterAttributeName(cp);
                break;
            }
            case State.BEFORE_ATTRIBUTE_VALUE: {
                this._stateBeforeAttributeValue(cp);
                break;
            }
            case State.ATTRIBUTE_VALUE_DOUBLE_QUOTED: {
                this._stateAttributeValueDoubleQuoted(cp);
                break;
            }
            case State.ATTRIBUTE_VALUE_SINGLE_QUOTED: {
                this._stateAttributeValueSingleQuoted(cp);
                break;
            }
            case State.ATTRIBUTE_VALUE_UNQUOTED: {
                this._stateAttributeValueUnquoted(cp);
                break;
            }
            case State.AFTER_ATTRIBUTE_VALUE_QUOTED: {
                this._stateAfterAttributeValueQuoted(cp);
                break;
            }
            case State.SELF_CLOSING_START_TAG: {
                this._stateSelfClosingStartTag(cp);
                break;
            }
            case State.BOGUS_COMMENT: {
                this._stateBogusComment(cp);
                break;
            }
            case State.MARKUP_DECLARATION_OPEN: {
                this._stateMarkupDeclarationOpen(cp);
                break;
            }
            case State.COMMENT_START: {
                this._stateCommentStart(cp);
                break;
            }
            case State.COMMENT_START_DASH: {
                this._stateCommentStartDash(cp);
                break;
            }
            case State.COMMENT: {
                this._stateComment(cp);
                break;
            }
            case State.COMMENT_LESS_THAN_SIGN: {
                this._stateCommentLessThanSign(cp);
                break;
            }
            case State.COMMENT_LESS_THAN_SIGN_BANG: {
                this._stateCommentLessThanSignBang(cp);
                break;
            }
            case State.COMMENT_LESS_THAN_SIGN_BANG_DASH: {
                this._stateCommentLessThanSignBangDash(cp);
                break;
            }
            case State.COMMENT_LESS_THAN_SIGN_BANG_DASH_DASH: {
                this._stateCommentLessThanSignBangDashDash(cp);
                break;
            }
            case State.COMMENT_END_DASH: {
                this._stateCommentEndDash(cp);
                break;
            }
            case State.COMMENT_END: {
                this._stateCommentEnd(cp);
                break;
            }
            case State.COMMENT_END_BANG: {
                this._stateCommentEndBang(cp);
                break;
            }
            case State.DOCTYPE: {
                this._stateDoctype(cp);
                break;
            }
            case State.BEFORE_DOCTYPE_NAME: {
                this._stateBeforeDoctypeName(cp);
                break;
            }
            case State.DOCTYPE_NAME: {
                this._stateDoctypeName(cp);
                break;
            }
            case State.AFTER_DOCTYPE_NAME: {
                this._stateAfterDoctypeName(cp);
                break;
            }
            case State.AFTER_DOCTYPE_PUBLIC_KEYWORD: {
                this._stateAfterDoctypePublicKeyword(cp);
                break;
            }
            case State.BEFORE_DOCTYPE_PUBLIC_IDENTIFIER: {
                this._stateBeforeDoctypePublicIdentifier(cp);
                break;
            }
            case State.DOCTYPE_PUBLIC_IDENTIFIER_DOUBLE_QUOTED: {
                this._stateDoctypePublicIdentifierDoubleQuoted(cp);
                break;
            }
            case State.DOCTYPE_PUBLIC_IDENTIFIER_SINGLE_QUOTED: {
                this._stateDoctypePublicIdentifierSingleQuoted(cp);
                break;
            }
            case State.AFTER_DOCTYPE_PUBLIC_IDENTIFIER: {
                this._stateAfterDoctypePublicIdentifier(cp);
                break;
            }
            case State.BETWEEN_DOCTYPE_PUBLIC_AND_SYSTEM_IDENTIFIERS: {
                this._stateBetweenDoctypePublicAndSystemIdentifiers(cp);
                break;
            }
            case State.AFTER_DOCTYPE_SYSTEM_KEYWORD: {
                this._stateAfterDoctypeSystemKeyword(cp);
                break;
            }
            case State.BEFORE_DOCTYPE_SYSTEM_IDENTIFIER: {
                this._stateBeforeDoctypeSystemIdentifier(cp);
                break;
            }
            case State.DOCTYPE_SYSTEM_IDENTIFIER_DOUBLE_QUOTED: {
                this._stateDoctypeSystemIdentifierDoubleQuoted(cp);
                break;
            }
            case State.DOCTYPE_SYSTEM_IDENTIFIER_SINGLE_QUOTED: {
                this._stateDoctypeSystemIdentifierSingleQuoted(cp);
                break;
            }
            case State.AFTER_DOCTYPE_SYSTEM_IDENTIFIER: {
                this._stateAfterDoctypeSystemIdentifier(cp);
                break;
            }
            case State.BOGUS_DOCTYPE: {
                this._stateBogusDoctype(cp);
                break;
            }
            case State.CDATA_SECTION: {
                this._stateCdataSection(cp);
                break;
            }
            case State.CDATA_SECTION_BRACKET: {
                this._stateCdataSectionBracket(cp);
                break;
            }
            case State.CDATA_SECTION_END: {
                this._stateCdataSectionEnd(cp);
                break;
            }
            case State.CHARACTER_REFERENCE: {
                this._stateCharacterReference();
                break;
            }
            case State.AMBIGUOUS_AMPERSAND: {
                this._stateAmbiguousAmpersand(cp);
                break;
            }
            default: {
                throw new Error('Unknown state');
            }
        }
    }
    // State machine
    // Data state
    //------------------------------------------------------------------
    _stateData(cp) {
        switch (cp) {
            case CODE_POINTS.LESS_THAN_SIGN: {
                this.state = State.TAG_OPEN;
                break;
            }
            case CODE_POINTS.AMPERSAND: {
                this._startCharacterReference();
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this._emitCodePoint(cp);
                break;
            }
            case CODE_POINTS.EOF: {
                this._emitEOFToken();
                break;
            }
            default: {
                this._emitCodePoint(cp);
            }
        }
    }
    //  RCDATA state
    //------------------------------------------------------------------
    _stateRcdata(cp) {
        switch (cp) {
            case CODE_POINTS.AMPERSAND: {
                this._startCharacterReference();
                break;
            }
            case CODE_POINTS.LESS_THAN_SIGN: {
                this.state = State.RCDATA_LESS_THAN_SIGN;
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this._emitChars(REPLACEMENT_CHARACTER);
                break;
            }
            case CODE_POINTS.EOF: {
                this._emitEOFToken();
                break;
            }
            default: {
                this._emitCodePoint(cp);
            }
        }
    }
    // RAWTEXT state
    //------------------------------------------------------------------
    _stateRawtext(cp) {
        switch (cp) {
            case CODE_POINTS.LESS_THAN_SIGN: {
                this.state = State.RAWTEXT_LESS_THAN_SIGN;
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this._emitChars(REPLACEMENT_CHARACTER);
                break;
            }
            case CODE_POINTS.EOF: {
                this._emitEOFToken();
                break;
            }
            default: {
                this._emitCodePoint(cp);
            }
        }
    }
    // Script data state
    //------------------------------------------------------------------
    _stateScriptData(cp) {
        switch (cp) {
            case CODE_POINTS.LESS_THAN_SIGN: {
                this.state = State.SCRIPT_DATA_LESS_THAN_SIGN;
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this._emitChars(REPLACEMENT_CHARACTER);
                break;
            }
            case CODE_POINTS.EOF: {
                this._emitEOFToken();
                break;
            }
            default: {
                this._emitCodePoint(cp);
            }
        }
    }
    // PLAINTEXT state
    //------------------------------------------------------------------
    _statePlaintext(cp) {
        switch (cp) {
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this._emitChars(REPLACEMENT_CHARACTER);
                break;
            }
            case CODE_POINTS.EOF: {
                this._emitEOFToken();
                break;
            }
            default: {
                this._emitCodePoint(cp);
            }
        }
    }
    // Tag open state
    //------------------------------------------------------------------
    _stateTagOpen(cp) {
        if (isAsciiLetter(cp)) {
            this._createStartTagToken();
            this.state = State.TAG_NAME;
            this._stateTagName(cp);
        }
        else
            switch (cp) {
                case CODE_POINTS.EXCLAMATION_MARK: {
                    this.state = State.MARKUP_DECLARATION_OPEN;
                    break;
                }
                case CODE_POINTS.SOLIDUS: {
                    this.state = State.END_TAG_OPEN;
                    break;
                }
                case CODE_POINTS.QUESTION_MARK: {
                    this._err(ERR.unexpectedQuestionMarkInsteadOfTagName);
                    this._createCommentToken(1);
                    this.state = State.BOGUS_COMMENT;
                    this._stateBogusComment(cp);
                    break;
                }
                case CODE_POINTS.EOF: {
                    this._err(ERR.eofBeforeTagName);
                    this._emitChars('<');
                    this._emitEOFToken();
                    break;
                }
                default: {
                    this._err(ERR.invalidFirstCharacterOfTagName);
                    this._emitChars('<');
                    this.state = State.DATA;
                    this._stateData(cp);
                }
            }
    }
    // End tag open state
    //------------------------------------------------------------------
    _stateEndTagOpen(cp) {
        if (isAsciiLetter(cp)) {
            this._createEndTagToken();
            this.state = State.TAG_NAME;
            this._stateTagName(cp);
        }
        else
            switch (cp) {
                case CODE_POINTS.GREATER_THAN_SIGN: {
                    this._err(ERR.missingEndTagName);
                    this.state = State.DATA;
                    break;
                }
                case CODE_POINTS.EOF: {
                    this._err(ERR.eofBeforeTagName);
                    this._emitChars('</');
                    this._emitEOFToken();
                    break;
                }
                default: {
                    this._err(ERR.invalidFirstCharacterOfTagName);
                    this._createCommentToken(2);
                    this.state = State.BOGUS_COMMENT;
                    this._stateBogusComment(cp);
                }
            }
    }
    // Tag name state
    //------------------------------------------------------------------
    _stateTagName(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                this.state = State.BEFORE_ATTRIBUTE_NAME;
                break;
            }
            case CODE_POINTS.SOLIDUS: {
                this.state = State.SELF_CLOSING_START_TAG;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this.state = State.DATA;
                this.emitCurrentTagToken();
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                token.tagName += REPLACEMENT_CHARACTER;
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInTag);
                this._emitEOFToken();
                break;
            }
            default: {
                token.tagName += String.fromCodePoint(isAsciiUpper(cp) ? toAsciiLower(cp) : cp);
            }
        }
    }
    // RCDATA less-than sign state
    //------------------------------------------------------------------
    _stateRcdataLessThanSign(cp) {
        if (cp === CODE_POINTS.SOLIDUS) {
            this.state = State.RCDATA_END_TAG_OPEN;
        }
        else {
            this._emitChars('<');
            this.state = State.RCDATA;
            this._stateRcdata(cp);
        }
    }
    // RCDATA end tag open state
    //------------------------------------------------------------------
    _stateRcdataEndTagOpen(cp) {
        if (isAsciiLetter(cp)) {
            this.state = State.RCDATA_END_TAG_NAME;
            this._stateRcdataEndTagName(cp);
        }
        else {
            this._emitChars('</');
            this.state = State.RCDATA;
            this._stateRcdata(cp);
        }
    }
    handleSpecialEndTag(_cp) {
        if (!this.preprocessor.startsWith(this.lastStartTagName, false)) {
            return !this._ensureHibernation();
        }
        this._createEndTagToken();
        const token = this.currentToken;
        token.tagName = this.lastStartTagName;
        const cp = this.preprocessor.peek(this.lastStartTagName.length);
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                this._advanceBy(this.lastStartTagName.length);
                this.state = State.BEFORE_ATTRIBUTE_NAME;
                return false;
            }
            case CODE_POINTS.SOLIDUS: {
                this._advanceBy(this.lastStartTagName.length);
                this.state = State.SELF_CLOSING_START_TAG;
                return false;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._advanceBy(this.lastStartTagName.length);
                this.emitCurrentTagToken();
                this.state = State.DATA;
                return false;
            }
            default: {
                return !this._ensureHibernation();
            }
        }
    }
    // RCDATA end tag name state
    //------------------------------------------------------------------
    _stateRcdataEndTagName(cp) {
        if (this.handleSpecialEndTag(cp)) {
            this._emitChars('</');
            this.state = State.RCDATA;
            this._stateRcdata(cp);
        }
    }
    // RAWTEXT less-than sign state
    //------------------------------------------------------------------
    _stateRawtextLessThanSign(cp) {
        if (cp === CODE_POINTS.SOLIDUS) {
            this.state = State.RAWTEXT_END_TAG_OPEN;
        }
        else {
            this._emitChars('<');
            this.state = State.RAWTEXT;
            this._stateRawtext(cp);
        }
    }
    // RAWTEXT end tag open state
    //------------------------------------------------------------------
    _stateRawtextEndTagOpen(cp) {
        if (isAsciiLetter(cp)) {
            this.state = State.RAWTEXT_END_TAG_NAME;
            this._stateRawtextEndTagName(cp);
        }
        else {
            this._emitChars('</');
            this.state = State.RAWTEXT;
            this._stateRawtext(cp);
        }
    }
    // RAWTEXT end tag name state
    //------------------------------------------------------------------
    _stateRawtextEndTagName(cp) {
        if (this.handleSpecialEndTag(cp)) {
            this._emitChars('</');
            this.state = State.RAWTEXT;
            this._stateRawtext(cp);
        }
    }
    // Script data less-than sign state
    //------------------------------------------------------------------
    _stateScriptDataLessThanSign(cp) {
        switch (cp) {
            case CODE_POINTS.SOLIDUS: {
                this.state = State.SCRIPT_DATA_END_TAG_OPEN;
                break;
            }
            case CODE_POINTS.EXCLAMATION_MARK: {
                this.state = State.SCRIPT_DATA_ESCAPE_START;
                this._emitChars('<!');
                break;
            }
            default: {
                this._emitChars('<');
                this.state = State.SCRIPT_DATA;
                this._stateScriptData(cp);
            }
        }
    }
    // Script data end tag open state
    //------------------------------------------------------------------
    _stateScriptDataEndTagOpen(cp) {
        if (isAsciiLetter(cp)) {
            this.state = State.SCRIPT_DATA_END_TAG_NAME;
            this._stateScriptDataEndTagName(cp);
        }
        else {
            this._emitChars('</');
            this.state = State.SCRIPT_DATA;
            this._stateScriptData(cp);
        }
    }
    // Script data end tag name state
    //------------------------------------------------------------------
    _stateScriptDataEndTagName(cp) {
        if (this.handleSpecialEndTag(cp)) {
            this._emitChars('</');
            this.state = State.SCRIPT_DATA;
            this._stateScriptData(cp);
        }
    }
    // Script data escape start state
    //------------------------------------------------------------------
    _stateScriptDataEscapeStart(cp) {
        if (cp === CODE_POINTS.HYPHEN_MINUS) {
            this.state = State.SCRIPT_DATA_ESCAPE_START_DASH;
            this._emitChars('-');
        }
        else {
            this.state = State.SCRIPT_DATA;
            this._stateScriptData(cp);
        }
    }
    // Script data escape start dash state
    //------------------------------------------------------------------
    _stateScriptDataEscapeStartDash(cp) {
        if (cp === CODE_POINTS.HYPHEN_MINUS) {
            this.state = State.SCRIPT_DATA_ESCAPED_DASH_DASH;
            this._emitChars('-');
        }
        else {
            this.state = State.SCRIPT_DATA;
            this._stateScriptData(cp);
        }
    }
    // Script data escaped state
    //------------------------------------------------------------------
    _stateScriptDataEscaped(cp) {
        switch (cp) {
            case CODE_POINTS.HYPHEN_MINUS: {
                this.state = State.SCRIPT_DATA_ESCAPED_DASH;
                this._emitChars('-');
                break;
            }
            case CODE_POINTS.LESS_THAN_SIGN: {
                this.state = State.SCRIPT_DATA_ESCAPED_LESS_THAN_SIGN;
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this._emitChars(REPLACEMENT_CHARACTER);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInScriptHtmlCommentLikeText);
                this._emitEOFToken();
                break;
            }
            default: {
                this._emitCodePoint(cp);
            }
        }
    }
    // Script data escaped dash state
    //------------------------------------------------------------------
    _stateScriptDataEscapedDash(cp) {
        switch (cp) {
            case CODE_POINTS.HYPHEN_MINUS: {
                this.state = State.SCRIPT_DATA_ESCAPED_DASH_DASH;
                this._emitChars('-');
                break;
            }
            case CODE_POINTS.LESS_THAN_SIGN: {
                this.state = State.SCRIPT_DATA_ESCAPED_LESS_THAN_SIGN;
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this.state = State.SCRIPT_DATA_ESCAPED;
                this._emitChars(REPLACEMENT_CHARACTER);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInScriptHtmlCommentLikeText);
                this._emitEOFToken();
                break;
            }
            default: {
                this.state = State.SCRIPT_DATA_ESCAPED;
                this._emitCodePoint(cp);
            }
        }
    }
    // Script data escaped dash dash state
    //------------------------------------------------------------------
    _stateScriptDataEscapedDashDash(cp) {
        switch (cp) {
            case CODE_POINTS.HYPHEN_MINUS: {
                this._emitChars('-');
                break;
            }
            case CODE_POINTS.LESS_THAN_SIGN: {
                this.state = State.SCRIPT_DATA_ESCAPED_LESS_THAN_SIGN;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this.state = State.SCRIPT_DATA;
                this._emitChars('>');
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this.state = State.SCRIPT_DATA_ESCAPED;
                this._emitChars(REPLACEMENT_CHARACTER);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInScriptHtmlCommentLikeText);
                this._emitEOFToken();
                break;
            }
            default: {
                this.state = State.SCRIPT_DATA_ESCAPED;
                this._emitCodePoint(cp);
            }
        }
    }
    // Script data escaped less-than sign state
    //------------------------------------------------------------------
    _stateScriptDataEscapedLessThanSign(cp) {
        if (cp === CODE_POINTS.SOLIDUS) {
            this.state = State.SCRIPT_DATA_ESCAPED_END_TAG_OPEN;
        }
        else if (isAsciiLetter(cp)) {
            this._emitChars('<');
            this.state = State.SCRIPT_DATA_DOUBLE_ESCAPE_START;
            this._stateScriptDataDoubleEscapeStart(cp);
        }
        else {
            this._emitChars('<');
            this.state = State.SCRIPT_DATA_ESCAPED;
            this._stateScriptDataEscaped(cp);
        }
    }
    // Script data escaped end tag open state
    //------------------------------------------------------------------
    _stateScriptDataEscapedEndTagOpen(cp) {
        if (isAsciiLetter(cp)) {
            this.state = State.SCRIPT_DATA_ESCAPED_END_TAG_NAME;
            this._stateScriptDataEscapedEndTagName(cp);
        }
        else {
            this._emitChars('</');
            this.state = State.SCRIPT_DATA_ESCAPED;
            this._stateScriptDataEscaped(cp);
        }
    }
    // Script data escaped end tag name state
    //------------------------------------------------------------------
    _stateScriptDataEscapedEndTagName(cp) {
        if (this.handleSpecialEndTag(cp)) {
            this._emitChars('</');
            this.state = State.SCRIPT_DATA_ESCAPED;
            this._stateScriptDataEscaped(cp);
        }
    }
    // Script data double escape start state
    //------------------------------------------------------------------
    _stateScriptDataDoubleEscapeStart(cp) {
        if (this.preprocessor.startsWith(SEQUENCES.SCRIPT, false) &&
            isScriptDataDoubleEscapeSequenceEnd(this.preprocessor.peek(SEQUENCES.SCRIPT.length))) {
            this._emitCodePoint(cp);
            for (let i = 0; i < SEQUENCES.SCRIPT.length; i++) {
                this._emitCodePoint(this._consume());
            }
            this.state = State.SCRIPT_DATA_DOUBLE_ESCAPED;
        }
        else if (!this._ensureHibernation()) {
            this.state = State.SCRIPT_DATA_ESCAPED;
            this._stateScriptDataEscaped(cp);
        }
    }
    // Script data double escaped state
    //------------------------------------------------------------------
    _stateScriptDataDoubleEscaped(cp) {
        switch (cp) {
            case CODE_POINTS.HYPHEN_MINUS: {
                this.state = State.SCRIPT_DATA_DOUBLE_ESCAPED_DASH;
                this._emitChars('-');
                break;
            }
            case CODE_POINTS.LESS_THAN_SIGN: {
                this.state = State.SCRIPT_DATA_DOUBLE_ESCAPED_LESS_THAN_SIGN;
                this._emitChars('<');
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this._emitChars(REPLACEMENT_CHARACTER);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInScriptHtmlCommentLikeText);
                this._emitEOFToken();
                break;
            }
            default: {
                this._emitCodePoint(cp);
            }
        }
    }
    // Script data double escaped dash state
    //------------------------------------------------------------------
    _stateScriptDataDoubleEscapedDash(cp) {
        switch (cp) {
            case CODE_POINTS.HYPHEN_MINUS: {
                this.state = State.SCRIPT_DATA_DOUBLE_ESCAPED_DASH_DASH;
                this._emitChars('-');
                break;
            }
            case CODE_POINTS.LESS_THAN_SIGN: {
                this.state = State.SCRIPT_DATA_DOUBLE_ESCAPED_LESS_THAN_SIGN;
                this._emitChars('<');
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this.state = State.SCRIPT_DATA_DOUBLE_ESCAPED;
                this._emitChars(REPLACEMENT_CHARACTER);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInScriptHtmlCommentLikeText);
                this._emitEOFToken();
                break;
            }
            default: {
                this.state = State.SCRIPT_DATA_DOUBLE_ESCAPED;
                this._emitCodePoint(cp);
            }
        }
    }
    // Script data double escaped dash dash state
    //------------------------------------------------------------------
    _stateScriptDataDoubleEscapedDashDash(cp) {
        switch (cp) {
            case CODE_POINTS.HYPHEN_MINUS: {
                this._emitChars('-');
                break;
            }
            case CODE_POINTS.LESS_THAN_SIGN: {
                this.state = State.SCRIPT_DATA_DOUBLE_ESCAPED_LESS_THAN_SIGN;
                this._emitChars('<');
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this.state = State.SCRIPT_DATA;
                this._emitChars('>');
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this.state = State.SCRIPT_DATA_DOUBLE_ESCAPED;
                this._emitChars(REPLACEMENT_CHARACTER);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInScriptHtmlCommentLikeText);
                this._emitEOFToken();
                break;
            }
            default: {
                this.state = State.SCRIPT_DATA_DOUBLE_ESCAPED;
                this._emitCodePoint(cp);
            }
        }
    }
    // Script data double escaped less-than sign state
    //------------------------------------------------------------------
    _stateScriptDataDoubleEscapedLessThanSign(cp) {
        if (cp === CODE_POINTS.SOLIDUS) {
            this.state = State.SCRIPT_DATA_DOUBLE_ESCAPE_END;
            this._emitChars('/');
        }
        else {
            this.state = State.SCRIPT_DATA_DOUBLE_ESCAPED;
            this._stateScriptDataDoubleEscaped(cp);
        }
    }
    // Script data double escape end state
    //------------------------------------------------------------------
    _stateScriptDataDoubleEscapeEnd(cp) {
        if (this.preprocessor.startsWith(SEQUENCES.SCRIPT, false) &&
            isScriptDataDoubleEscapeSequenceEnd(this.preprocessor.peek(SEQUENCES.SCRIPT.length))) {
            this._emitCodePoint(cp);
            for (let i = 0; i < SEQUENCES.SCRIPT.length; i++) {
                this._emitCodePoint(this._consume());
            }
            this.state = State.SCRIPT_DATA_ESCAPED;
        }
        else if (!this._ensureHibernation()) {
            this.state = State.SCRIPT_DATA_DOUBLE_ESCAPED;
            this._stateScriptDataDoubleEscaped(cp);
        }
    }
    // Before attribute name state
    //------------------------------------------------------------------
    _stateBeforeAttributeName(cp) {
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                // Ignore whitespace
                break;
            }
            case CODE_POINTS.SOLIDUS:
            case CODE_POINTS.GREATER_THAN_SIGN:
            case CODE_POINTS.EOF: {
                this.state = State.AFTER_ATTRIBUTE_NAME;
                this._stateAfterAttributeName(cp);
                break;
            }
            case CODE_POINTS.EQUALS_SIGN: {
                this._err(ERR.unexpectedEqualsSignBeforeAttributeName);
                this._createAttr('=');
                this.state = State.ATTRIBUTE_NAME;
                break;
            }
            default: {
                this._createAttr('');
                this.state = State.ATTRIBUTE_NAME;
                this._stateAttributeName(cp);
            }
        }
    }
    // Attribute name state
    //------------------------------------------------------------------
    _stateAttributeName(cp) {
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED:
            case CODE_POINTS.SOLIDUS:
            case CODE_POINTS.GREATER_THAN_SIGN:
            case CODE_POINTS.EOF: {
                this._leaveAttrName();
                this.state = State.AFTER_ATTRIBUTE_NAME;
                this._stateAfterAttributeName(cp);
                break;
            }
            case CODE_POINTS.EQUALS_SIGN: {
                this._leaveAttrName();
                this.state = State.BEFORE_ATTRIBUTE_VALUE;
                break;
            }
            case CODE_POINTS.QUOTATION_MARK:
            case CODE_POINTS.APOSTROPHE:
            case CODE_POINTS.LESS_THAN_SIGN: {
                this._err(ERR.unexpectedCharacterInAttributeName);
                this.currentAttr.name += String.fromCodePoint(cp);
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this.currentAttr.name += REPLACEMENT_CHARACTER;
                break;
            }
            default: {
                this.currentAttr.name += String.fromCodePoint(isAsciiUpper(cp) ? toAsciiLower(cp) : cp);
            }
        }
    }
    // After attribute name state
    //------------------------------------------------------------------
    _stateAfterAttributeName(cp) {
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                // Ignore whitespace
                break;
            }
            case CODE_POINTS.SOLIDUS: {
                this.state = State.SELF_CLOSING_START_TAG;
                break;
            }
            case CODE_POINTS.EQUALS_SIGN: {
                this.state = State.BEFORE_ATTRIBUTE_VALUE;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this.state = State.DATA;
                this.emitCurrentTagToken();
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInTag);
                this._emitEOFToken();
                break;
            }
            default: {
                this._createAttr('');
                this.state = State.ATTRIBUTE_NAME;
                this._stateAttributeName(cp);
            }
        }
    }
    // Before attribute value state
    //------------------------------------------------------------------
    _stateBeforeAttributeValue(cp) {
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                // Ignore whitespace
                break;
            }
            case CODE_POINTS.QUOTATION_MARK: {
                this.state = State.ATTRIBUTE_VALUE_DOUBLE_QUOTED;
                break;
            }
            case CODE_POINTS.APOSTROPHE: {
                this.state = State.ATTRIBUTE_VALUE_SINGLE_QUOTED;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._err(ERR.missingAttributeValue);
                this.state = State.DATA;
                this.emitCurrentTagToken();
                break;
            }
            default: {
                this.state = State.ATTRIBUTE_VALUE_UNQUOTED;
                this._stateAttributeValueUnquoted(cp);
            }
        }
    }
    // Attribute value (double-quoted) state
    //------------------------------------------------------------------
    _stateAttributeValueDoubleQuoted(cp) {
        switch (cp) {
            case CODE_POINTS.QUOTATION_MARK: {
                this.state = State.AFTER_ATTRIBUTE_VALUE_QUOTED;
                break;
            }
            case CODE_POINTS.AMPERSAND: {
                this._startCharacterReference();
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this.currentAttr.value += REPLACEMENT_CHARACTER;
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInTag);
                this._emitEOFToken();
                break;
            }
            default: {
                this.currentAttr.value += String.fromCodePoint(cp);
            }
        }
    }
    // Attribute value (single-quoted) state
    //------------------------------------------------------------------
    _stateAttributeValueSingleQuoted(cp) {
        switch (cp) {
            case CODE_POINTS.APOSTROPHE: {
                this.state = State.AFTER_ATTRIBUTE_VALUE_QUOTED;
                break;
            }
            case CODE_POINTS.AMPERSAND: {
                this._startCharacterReference();
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this.currentAttr.value += REPLACEMENT_CHARACTER;
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInTag);
                this._emitEOFToken();
                break;
            }
            default: {
                this.currentAttr.value += String.fromCodePoint(cp);
            }
        }
    }
    // Attribute value (unquoted) state
    //------------------------------------------------------------------
    _stateAttributeValueUnquoted(cp) {
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                this._leaveAttrValue();
                this.state = State.BEFORE_ATTRIBUTE_NAME;
                break;
            }
            case CODE_POINTS.AMPERSAND: {
                this._startCharacterReference();
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._leaveAttrValue();
                this.state = State.DATA;
                this.emitCurrentTagToken();
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                this.currentAttr.value += REPLACEMENT_CHARACTER;
                break;
            }
            case CODE_POINTS.QUOTATION_MARK:
            case CODE_POINTS.APOSTROPHE:
            case CODE_POINTS.LESS_THAN_SIGN:
            case CODE_POINTS.EQUALS_SIGN:
            case CODE_POINTS.GRAVE_ACCENT: {
                this._err(ERR.unexpectedCharacterInUnquotedAttributeValue);
                this.currentAttr.value += String.fromCodePoint(cp);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInTag);
                this._emitEOFToken();
                break;
            }
            default: {
                this.currentAttr.value += String.fromCodePoint(cp);
            }
        }
    }
    // After attribute value (quoted) state
    //------------------------------------------------------------------
    _stateAfterAttributeValueQuoted(cp) {
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                this._leaveAttrValue();
                this.state = State.BEFORE_ATTRIBUTE_NAME;
                break;
            }
            case CODE_POINTS.SOLIDUS: {
                this._leaveAttrValue();
                this.state = State.SELF_CLOSING_START_TAG;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._leaveAttrValue();
                this.state = State.DATA;
                this.emitCurrentTagToken();
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInTag);
                this._emitEOFToken();
                break;
            }
            default: {
                this._err(ERR.missingWhitespaceBetweenAttributes);
                this.state = State.BEFORE_ATTRIBUTE_NAME;
                this._stateBeforeAttributeName(cp);
            }
        }
    }
    // Self-closing start tag state
    //------------------------------------------------------------------
    _stateSelfClosingStartTag(cp) {
        switch (cp) {
            case CODE_POINTS.GREATER_THAN_SIGN: {
                const token = this.currentToken;
                token.selfClosing = true;
                this.state = State.DATA;
                this.emitCurrentTagToken();
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInTag);
                this._emitEOFToken();
                break;
            }
            default: {
                this._err(ERR.unexpectedSolidusInTag);
                this.state = State.BEFORE_ATTRIBUTE_NAME;
                this._stateBeforeAttributeName(cp);
            }
        }
    }
    // Bogus comment state
    //------------------------------------------------------------------
    _stateBogusComment(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this.state = State.DATA;
                this.emitCurrentComment(token);
                break;
            }
            case CODE_POINTS.EOF: {
                this.emitCurrentComment(token);
                this._emitEOFToken();
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                token.data += REPLACEMENT_CHARACTER;
                break;
            }
            default: {
                token.data += String.fromCodePoint(cp);
            }
        }
    }
    // Markup declaration open state
    //------------------------------------------------------------------
    _stateMarkupDeclarationOpen(cp) {
        if (this._consumeSequenceIfMatch(SEQUENCES.DASH_DASH, true)) {
            this._createCommentToken(SEQUENCES.DASH_DASH.length + 1);
            this.state = State.COMMENT_START;
        }
        else if (this._consumeSequenceIfMatch(SEQUENCES.DOCTYPE, false)) {
            // NOTE: Doctypes tokens are created without fixed offsets. We keep track of the moment a doctype *might* start here.
            this.currentLocation = this.getCurrentLocation(SEQUENCES.DOCTYPE.length + 1);
            this.state = State.DOCTYPE;
        }
        else if (this._consumeSequenceIfMatch(SEQUENCES.CDATA_START, true)) {
            if (this.inForeignNode) {
                this.state = State.CDATA_SECTION;
            }
            else {
                this._err(ERR.cdataInHtmlContent);
                this._createCommentToken(SEQUENCES.CDATA_START.length + 1);
                this.currentToken.data = '[CDATA[';
                this.state = State.BOGUS_COMMENT;
            }
        }
        //NOTE: Sequence lookups can be abrupted by hibernation. In that case, lookup
        //results are no longer valid and we will need to start over.
        else if (!this._ensureHibernation()) {
            this._err(ERR.incorrectlyOpenedComment);
            this._createCommentToken(2);
            this.state = State.BOGUS_COMMENT;
            this._stateBogusComment(cp);
        }
    }
    // Comment start state
    //------------------------------------------------------------------
    _stateCommentStart(cp) {
        switch (cp) {
            case CODE_POINTS.HYPHEN_MINUS: {
                this.state = State.COMMENT_START_DASH;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._err(ERR.abruptClosingOfEmptyComment);
                this.state = State.DATA;
                const token = this.currentToken;
                this.emitCurrentComment(token);
                break;
            }
            default: {
                this.state = State.COMMENT;
                this._stateComment(cp);
            }
        }
    }
    // Comment start dash state
    //------------------------------------------------------------------
    _stateCommentStartDash(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.HYPHEN_MINUS: {
                this.state = State.COMMENT_END;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._err(ERR.abruptClosingOfEmptyComment);
                this.state = State.DATA;
                this.emitCurrentComment(token);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInComment);
                this.emitCurrentComment(token);
                this._emitEOFToken();
                break;
            }
            default: {
                token.data += '-';
                this.state = State.COMMENT;
                this._stateComment(cp);
            }
        }
    }
    // Comment state
    //------------------------------------------------------------------
    _stateComment(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.HYPHEN_MINUS: {
                this.state = State.COMMENT_END_DASH;
                break;
            }
            case CODE_POINTS.LESS_THAN_SIGN: {
                token.data += '<';
                this.state = State.COMMENT_LESS_THAN_SIGN;
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                token.data += REPLACEMENT_CHARACTER;
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInComment);
                this.emitCurrentComment(token);
                this._emitEOFToken();
                break;
            }
            default: {
                token.data += String.fromCodePoint(cp);
            }
        }
    }
    // Comment less-than sign state
    //------------------------------------------------------------------
    _stateCommentLessThanSign(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.EXCLAMATION_MARK: {
                token.data += '!';
                this.state = State.COMMENT_LESS_THAN_SIGN_BANG;
                break;
            }
            case CODE_POINTS.LESS_THAN_SIGN: {
                token.data += '<';
                break;
            }
            default: {
                this.state = State.COMMENT;
                this._stateComment(cp);
            }
        }
    }
    // Comment less-than sign bang state
    //------------------------------------------------------------------
    _stateCommentLessThanSignBang(cp) {
        if (cp === CODE_POINTS.HYPHEN_MINUS) {
            this.state = State.COMMENT_LESS_THAN_SIGN_BANG_DASH;
        }
        else {
            this.state = State.COMMENT;
            this._stateComment(cp);
        }
    }
    // Comment less-than sign bang dash state
    //------------------------------------------------------------------
    _stateCommentLessThanSignBangDash(cp) {
        if (cp === CODE_POINTS.HYPHEN_MINUS) {
            this.state = State.COMMENT_LESS_THAN_SIGN_BANG_DASH_DASH;
        }
        else {
            this.state = State.COMMENT_END_DASH;
            this._stateCommentEndDash(cp);
        }
    }
    // Comment less-than sign bang dash dash state
    //------------------------------------------------------------------
    _stateCommentLessThanSignBangDashDash(cp) {
        if (cp !== CODE_POINTS.GREATER_THAN_SIGN && cp !== CODE_POINTS.EOF) {
            this._err(ERR.nestedComment);
        }
        this.state = State.COMMENT_END;
        this._stateCommentEnd(cp);
    }
    // Comment end dash state
    //------------------------------------------------------------------
    _stateCommentEndDash(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.HYPHEN_MINUS: {
                this.state = State.COMMENT_END;
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInComment);
                this.emitCurrentComment(token);
                this._emitEOFToken();
                break;
            }
            default: {
                token.data += '-';
                this.state = State.COMMENT;
                this._stateComment(cp);
            }
        }
    }
    // Comment end state
    //------------------------------------------------------------------
    _stateCommentEnd(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this.state = State.DATA;
                this.emitCurrentComment(token);
                break;
            }
            case CODE_POINTS.EXCLAMATION_MARK: {
                this.state = State.COMMENT_END_BANG;
                break;
            }
            case CODE_POINTS.HYPHEN_MINUS: {
                token.data += '-';
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInComment);
                this.emitCurrentComment(token);
                this._emitEOFToken();
                break;
            }
            default: {
                token.data += '--';
                this.state = State.COMMENT;
                this._stateComment(cp);
            }
        }
    }
    // Comment end bang state
    //------------------------------------------------------------------
    _stateCommentEndBang(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.HYPHEN_MINUS: {
                token.data += '--!';
                this.state = State.COMMENT_END_DASH;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._err(ERR.incorrectlyClosedComment);
                this.state = State.DATA;
                this.emitCurrentComment(token);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInComment);
                this.emitCurrentComment(token);
                this._emitEOFToken();
                break;
            }
            default: {
                token.data += '--!';
                this.state = State.COMMENT;
                this._stateComment(cp);
            }
        }
    }
    // DOCTYPE state
    //------------------------------------------------------------------
    _stateDoctype(cp) {
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                this.state = State.BEFORE_DOCTYPE_NAME;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this.state = State.BEFORE_DOCTYPE_NAME;
                this._stateBeforeDoctypeName(cp);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInDoctype);
                this._createDoctypeToken(null);
                const token = this.currentToken;
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            default: {
                this._err(ERR.missingWhitespaceBeforeDoctypeName);
                this.state = State.BEFORE_DOCTYPE_NAME;
                this._stateBeforeDoctypeName(cp);
            }
        }
    }
    // Before DOCTYPE name state
    //------------------------------------------------------------------
    _stateBeforeDoctypeName(cp) {
        if (isAsciiUpper(cp)) {
            this._createDoctypeToken(String.fromCharCode(toAsciiLower(cp)));
            this.state = State.DOCTYPE_NAME;
        }
        else
            switch (cp) {
                case CODE_POINTS.SPACE:
                case CODE_POINTS.LINE_FEED:
                case CODE_POINTS.TABULATION:
                case CODE_POINTS.FORM_FEED: {
                    // Ignore whitespace
                    break;
                }
                case CODE_POINTS.NULL: {
                    this._err(ERR.unexpectedNullCharacter);
                    this._createDoctypeToken(REPLACEMENT_CHARACTER);
                    this.state = State.DOCTYPE_NAME;
                    break;
                }
                case CODE_POINTS.GREATER_THAN_SIGN: {
                    this._err(ERR.missingDoctypeName);
                    this._createDoctypeToken(null);
                    const token = this.currentToken;
                    token.forceQuirks = true;
                    this.emitCurrentDoctype(token);
                    this.state = State.DATA;
                    break;
                }
                case CODE_POINTS.EOF: {
                    this._err(ERR.eofInDoctype);
                    this._createDoctypeToken(null);
                    const token = this.currentToken;
                    token.forceQuirks = true;
                    this.emitCurrentDoctype(token);
                    this._emitEOFToken();
                    break;
                }
                default: {
                    this._createDoctypeToken(String.fromCodePoint(cp));
                    this.state = State.DOCTYPE_NAME;
                }
            }
    }
    // DOCTYPE name state
    //------------------------------------------------------------------
    _stateDoctypeName(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                this.state = State.AFTER_DOCTYPE_NAME;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this.state = State.DATA;
                this.emitCurrentDoctype(token);
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                token.name += REPLACEMENT_CHARACTER;
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInDoctype);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            default: {
                token.name += String.fromCodePoint(isAsciiUpper(cp) ? toAsciiLower(cp) : cp);
            }
        }
    }
    // After DOCTYPE name state
    //------------------------------------------------------------------
    _stateAfterDoctypeName(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                // Ignore whitespace
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this.state = State.DATA;
                this.emitCurrentDoctype(token);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInDoctype);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            default: {
                if (this._consumeSequenceIfMatch(SEQUENCES.PUBLIC, false)) {
                    this.state = State.AFTER_DOCTYPE_PUBLIC_KEYWORD;
                }
                else if (this._consumeSequenceIfMatch(SEQUENCES.SYSTEM, false)) {
                    this.state = State.AFTER_DOCTYPE_SYSTEM_KEYWORD;
                }
                //NOTE: sequence lookup can be abrupted by hibernation. In that case lookup
                //results are no longer valid and we will need to start over.
                else if (!this._ensureHibernation()) {
                    this._err(ERR.invalidCharacterSequenceAfterDoctypeName);
                    token.forceQuirks = true;
                    this.state = State.BOGUS_DOCTYPE;
                    this._stateBogusDoctype(cp);
                }
            }
        }
    }
    // After DOCTYPE public keyword state
    //------------------------------------------------------------------
    _stateAfterDoctypePublicKeyword(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                this.state = State.BEFORE_DOCTYPE_PUBLIC_IDENTIFIER;
                break;
            }
            case CODE_POINTS.QUOTATION_MARK: {
                this._err(ERR.missingWhitespaceAfterDoctypePublicKeyword);
                token.publicId = '';
                this.state = State.DOCTYPE_PUBLIC_IDENTIFIER_DOUBLE_QUOTED;
                break;
            }
            case CODE_POINTS.APOSTROPHE: {
                this._err(ERR.missingWhitespaceAfterDoctypePublicKeyword);
                token.publicId = '';
                this.state = State.DOCTYPE_PUBLIC_IDENTIFIER_SINGLE_QUOTED;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._err(ERR.missingDoctypePublicIdentifier);
                token.forceQuirks = true;
                this.state = State.DATA;
                this.emitCurrentDoctype(token);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInDoctype);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            default: {
                this._err(ERR.missingQuoteBeforeDoctypePublicIdentifier);
                token.forceQuirks = true;
                this.state = State.BOGUS_DOCTYPE;
                this._stateBogusDoctype(cp);
            }
        }
    }
    // Before DOCTYPE public identifier state
    //------------------------------------------------------------------
    _stateBeforeDoctypePublicIdentifier(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                // Ignore whitespace
                break;
            }
            case CODE_POINTS.QUOTATION_MARK: {
                token.publicId = '';
                this.state = State.DOCTYPE_PUBLIC_IDENTIFIER_DOUBLE_QUOTED;
                break;
            }
            case CODE_POINTS.APOSTROPHE: {
                token.publicId = '';
                this.state = State.DOCTYPE_PUBLIC_IDENTIFIER_SINGLE_QUOTED;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._err(ERR.missingDoctypePublicIdentifier);
                token.forceQuirks = true;
                this.state = State.DATA;
                this.emitCurrentDoctype(token);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInDoctype);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            default: {
                this._err(ERR.missingQuoteBeforeDoctypePublicIdentifier);
                token.forceQuirks = true;
                this.state = State.BOGUS_DOCTYPE;
                this._stateBogusDoctype(cp);
            }
        }
    }
    // DOCTYPE public identifier (double-quoted) state
    //------------------------------------------------------------------
    _stateDoctypePublicIdentifierDoubleQuoted(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.QUOTATION_MARK: {
                this.state = State.AFTER_DOCTYPE_PUBLIC_IDENTIFIER;
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                token.publicId += REPLACEMENT_CHARACTER;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._err(ERR.abruptDoctypePublicIdentifier);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this.state = State.DATA;
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInDoctype);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            default: {
                token.publicId += String.fromCodePoint(cp);
            }
        }
    }
    // DOCTYPE public identifier (single-quoted) state
    //------------------------------------------------------------------
    _stateDoctypePublicIdentifierSingleQuoted(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.APOSTROPHE: {
                this.state = State.AFTER_DOCTYPE_PUBLIC_IDENTIFIER;
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                token.publicId += REPLACEMENT_CHARACTER;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._err(ERR.abruptDoctypePublicIdentifier);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this.state = State.DATA;
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInDoctype);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            default: {
                token.publicId += String.fromCodePoint(cp);
            }
        }
    }
    // After DOCTYPE public identifier state
    //------------------------------------------------------------------
    _stateAfterDoctypePublicIdentifier(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                this.state = State.BETWEEN_DOCTYPE_PUBLIC_AND_SYSTEM_IDENTIFIERS;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this.state = State.DATA;
                this.emitCurrentDoctype(token);
                break;
            }
            case CODE_POINTS.QUOTATION_MARK: {
                this._err(ERR.missingWhitespaceBetweenDoctypePublicAndSystemIdentifiers);
                token.systemId = '';
                this.state = State.DOCTYPE_SYSTEM_IDENTIFIER_DOUBLE_QUOTED;
                break;
            }
            case CODE_POINTS.APOSTROPHE: {
                this._err(ERR.missingWhitespaceBetweenDoctypePublicAndSystemIdentifiers);
                token.systemId = '';
                this.state = State.DOCTYPE_SYSTEM_IDENTIFIER_SINGLE_QUOTED;
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInDoctype);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            default: {
                this._err(ERR.missingQuoteBeforeDoctypeSystemIdentifier);
                token.forceQuirks = true;
                this.state = State.BOGUS_DOCTYPE;
                this._stateBogusDoctype(cp);
            }
        }
    }
    // Between DOCTYPE public and system identifiers state
    //------------------------------------------------------------------
    _stateBetweenDoctypePublicAndSystemIdentifiers(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                // Ignore whitespace
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this.emitCurrentDoctype(token);
                this.state = State.DATA;
                break;
            }
            case CODE_POINTS.QUOTATION_MARK: {
                token.systemId = '';
                this.state = State.DOCTYPE_SYSTEM_IDENTIFIER_DOUBLE_QUOTED;
                break;
            }
            case CODE_POINTS.APOSTROPHE: {
                token.systemId = '';
                this.state = State.DOCTYPE_SYSTEM_IDENTIFIER_SINGLE_QUOTED;
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInDoctype);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            default: {
                this._err(ERR.missingQuoteBeforeDoctypeSystemIdentifier);
                token.forceQuirks = true;
                this.state = State.BOGUS_DOCTYPE;
                this._stateBogusDoctype(cp);
            }
        }
    }
    // After DOCTYPE system keyword state
    //------------------------------------------------------------------
    _stateAfterDoctypeSystemKeyword(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                this.state = State.BEFORE_DOCTYPE_SYSTEM_IDENTIFIER;
                break;
            }
            case CODE_POINTS.QUOTATION_MARK: {
                this._err(ERR.missingWhitespaceAfterDoctypeSystemKeyword);
                token.systemId = '';
                this.state = State.DOCTYPE_SYSTEM_IDENTIFIER_DOUBLE_QUOTED;
                break;
            }
            case CODE_POINTS.APOSTROPHE: {
                this._err(ERR.missingWhitespaceAfterDoctypeSystemKeyword);
                token.systemId = '';
                this.state = State.DOCTYPE_SYSTEM_IDENTIFIER_SINGLE_QUOTED;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._err(ERR.missingDoctypeSystemIdentifier);
                token.forceQuirks = true;
                this.state = State.DATA;
                this.emitCurrentDoctype(token);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInDoctype);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            default: {
                this._err(ERR.missingQuoteBeforeDoctypeSystemIdentifier);
                token.forceQuirks = true;
                this.state = State.BOGUS_DOCTYPE;
                this._stateBogusDoctype(cp);
            }
        }
    }
    // Before DOCTYPE system identifier state
    //------------------------------------------------------------------
    _stateBeforeDoctypeSystemIdentifier(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                // Ignore whitespace
                break;
            }
            case CODE_POINTS.QUOTATION_MARK: {
                token.systemId = '';
                this.state = State.DOCTYPE_SYSTEM_IDENTIFIER_DOUBLE_QUOTED;
                break;
            }
            case CODE_POINTS.APOSTROPHE: {
                token.systemId = '';
                this.state = State.DOCTYPE_SYSTEM_IDENTIFIER_SINGLE_QUOTED;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._err(ERR.missingDoctypeSystemIdentifier);
                token.forceQuirks = true;
                this.state = State.DATA;
                this.emitCurrentDoctype(token);
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInDoctype);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            default: {
                this._err(ERR.missingQuoteBeforeDoctypeSystemIdentifier);
                token.forceQuirks = true;
                this.state = State.BOGUS_DOCTYPE;
                this._stateBogusDoctype(cp);
            }
        }
    }
    // DOCTYPE system identifier (double-quoted) state
    //------------------------------------------------------------------
    _stateDoctypeSystemIdentifierDoubleQuoted(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.QUOTATION_MARK: {
                this.state = State.AFTER_DOCTYPE_SYSTEM_IDENTIFIER;
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                token.systemId += REPLACEMENT_CHARACTER;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._err(ERR.abruptDoctypeSystemIdentifier);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this.state = State.DATA;
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInDoctype);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            default: {
                token.systemId += String.fromCodePoint(cp);
            }
        }
    }
    // DOCTYPE system identifier (single-quoted) state
    //------------------------------------------------------------------
    _stateDoctypeSystemIdentifierSingleQuoted(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.APOSTROPHE: {
                this.state = State.AFTER_DOCTYPE_SYSTEM_IDENTIFIER;
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                token.systemId += REPLACEMENT_CHARACTER;
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this._err(ERR.abruptDoctypeSystemIdentifier);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this.state = State.DATA;
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInDoctype);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            default: {
                token.systemId += String.fromCodePoint(cp);
            }
        }
    }
    // After DOCTYPE system identifier state
    //------------------------------------------------------------------
    _stateAfterDoctypeSystemIdentifier(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.SPACE:
            case CODE_POINTS.LINE_FEED:
            case CODE_POINTS.TABULATION:
            case CODE_POINTS.FORM_FEED: {
                // Ignore whitespace
                break;
            }
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this.emitCurrentDoctype(token);
                this.state = State.DATA;
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInDoctype);
                token.forceQuirks = true;
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            default: {
                this._err(ERR.unexpectedCharacterAfterDoctypeSystemIdentifier);
                this.state = State.BOGUS_DOCTYPE;
                this._stateBogusDoctype(cp);
            }
        }
    }
    // Bogus DOCTYPE state
    //------------------------------------------------------------------
    _stateBogusDoctype(cp) {
        const token = this.currentToken;
        switch (cp) {
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this.emitCurrentDoctype(token);
                this.state = State.DATA;
                break;
            }
            case CODE_POINTS.NULL: {
                this._err(ERR.unexpectedNullCharacter);
                break;
            }
            case CODE_POINTS.EOF: {
                this.emitCurrentDoctype(token);
                this._emitEOFToken();
                break;
            }
            // Do nothing
        }
    }
    // CDATA section state
    //------------------------------------------------------------------
    _stateCdataSection(cp) {
        switch (cp) {
            case CODE_POINTS.RIGHT_SQUARE_BRACKET: {
                this.state = State.CDATA_SECTION_BRACKET;
                break;
            }
            case CODE_POINTS.EOF: {
                this._err(ERR.eofInCdata);
                this._emitEOFToken();
                break;
            }
            default: {
                this._emitCodePoint(cp);
            }
        }
    }
    // CDATA section bracket state
    //------------------------------------------------------------------
    _stateCdataSectionBracket(cp) {
        if (cp === CODE_POINTS.RIGHT_SQUARE_BRACKET) {
            this.state = State.CDATA_SECTION_END;
        }
        else {
            this._emitChars(']');
            this.state = State.CDATA_SECTION;
            this._stateCdataSection(cp);
        }
    }
    // CDATA section end state
    //------------------------------------------------------------------
    _stateCdataSectionEnd(cp) {
        switch (cp) {
            case CODE_POINTS.GREATER_THAN_SIGN: {
                this.state = State.DATA;
                break;
            }
            case CODE_POINTS.RIGHT_SQUARE_BRACKET: {
                this._emitChars(']');
                break;
            }
            default: {
                this._emitChars(']]');
                this.state = State.CDATA_SECTION;
                this._stateCdataSection(cp);
            }
        }
    }
    // Character reference state
    //------------------------------------------------------------------
    _stateCharacterReference() {
        let length = this.entityDecoder.write(this.preprocessor.html, this.preprocessor.pos);
        if (length < 0) {
            if (this.preprocessor.lastChunkWritten) {
                length = this.entityDecoder.end();
            }
            else {
                // Wait for the rest of the entity.
                this.active = false;
                // Mark the entire buffer as read.
                this.preprocessor.pos = this.preprocessor.html.length - 1;
                this.consumedAfterSnapshot = 0;
                this.preprocessor.endOfChunkHit = true;
                return;
            }
        }
        if (length === 0) {
            // This was not a valid entity. Go back to the beginning, and
            // figure out what to do.
            this.preprocessor.pos = this.entityStartPos;
            this._flushCodePointConsumedAsCharacterReference(CODE_POINTS.AMPERSAND);
            this.state =
                !this._isCharacterReferenceInAttribute() && isAsciiAlphaNumeric(this.preprocessor.peek(1))
                    ? State.AMBIGUOUS_AMPERSAND
                    : this.returnState;
        }
        else {
            // We successfully parsed an entity. Switch to the return state.
            this.state = this.returnState;
        }
    }
    // Ambiguos ampersand state
    //------------------------------------------------------------------
    _stateAmbiguousAmpersand(cp) {
        if (isAsciiAlphaNumeric(cp)) {
            this._flushCodePointConsumedAsCharacterReference(cp);
        }
        else {
            if (cp === CODE_POINTS.SEMICOLON) {
                this._err(ERR.unknownNamedCharacterReference);
            }
            this.state = this.returnState;
            this._callState(cp);
        }
    }
}

//Element utils
const IMPLICIT_END_TAG_REQUIRED = new Set([TAG_ID.DD, TAG_ID.DT, TAG_ID.LI, TAG_ID.OPTGROUP, TAG_ID.OPTION, TAG_ID.P, TAG_ID.RB, TAG_ID.RP, TAG_ID.RT, TAG_ID.RTC]);
const IMPLICIT_END_TAG_REQUIRED_THOROUGHLY = new Set([
    ...IMPLICIT_END_TAG_REQUIRED,
    TAG_ID.CAPTION,
    TAG_ID.COLGROUP,
    TAG_ID.TBODY,
    TAG_ID.TD,
    TAG_ID.TFOOT,
    TAG_ID.TH,
    TAG_ID.THEAD,
    TAG_ID.TR,
]);
const SCOPING_ELEMENTS_HTML = new Set([
    TAG_ID.APPLET,
    TAG_ID.CAPTION,
    TAG_ID.HTML,
    TAG_ID.MARQUEE,
    TAG_ID.OBJECT,
    TAG_ID.TABLE,
    TAG_ID.TD,
    TAG_ID.TEMPLATE,
    TAG_ID.TH,
]);
const SCOPING_ELEMENTS_HTML_LIST = new Set([...SCOPING_ELEMENTS_HTML, TAG_ID.OL, TAG_ID.UL]);
const SCOPING_ELEMENTS_HTML_BUTTON = new Set([...SCOPING_ELEMENTS_HTML, TAG_ID.BUTTON]);
const SCOPING_ELEMENTS_MATHML = new Set([TAG_ID.ANNOTATION_XML, TAG_ID.MI, TAG_ID.MN, TAG_ID.MO, TAG_ID.MS, TAG_ID.MTEXT]);
const SCOPING_ELEMENTS_SVG = new Set([TAG_ID.DESC, TAG_ID.FOREIGN_OBJECT, TAG_ID.TITLE]);
const TABLE_ROW_CONTEXT = new Set([TAG_ID.TR, TAG_ID.TEMPLATE, TAG_ID.HTML]);
const TABLE_BODY_CONTEXT = new Set([TAG_ID.TBODY, TAG_ID.TFOOT, TAG_ID.THEAD, TAG_ID.TEMPLATE, TAG_ID.HTML]);
const TABLE_CONTEXT = new Set([TAG_ID.TABLE, TAG_ID.TEMPLATE, TAG_ID.HTML]);
const TABLE_CELLS = new Set([TAG_ID.TD, TAG_ID.TH]);
//Stack of open elements
class OpenElementStack {
    get currentTmplContentOrNode() {
        return this._isInTemplate() ? this.treeAdapter.getTemplateContent(this.current) : this.current;
    }
    constructor(document, treeAdapter, handler) {
        this.treeAdapter = treeAdapter;
        this.handler = handler;
        this.items = [];
        this.tagIDs = [];
        this.stackTop = -1;
        this.tmplCount = 0;
        this.currentTagId = TAG_ID.UNKNOWN;
        this.current = document;
    }
    //Index of element
    _indexOf(element) {
        return this.items.lastIndexOf(element, this.stackTop);
    }
    //Update current element
    _isInTemplate() {
        return this.currentTagId === TAG_ID.TEMPLATE && this.treeAdapter.getNamespaceURI(this.current) === NS.HTML;
    }
    _updateCurrentElement() {
        this.current = this.items[this.stackTop];
        this.currentTagId = this.tagIDs[this.stackTop];
    }
    //Mutations
    push(element, tagID) {
        this.stackTop++;
        this.items[this.stackTop] = element;
        this.current = element;
        this.tagIDs[this.stackTop] = tagID;
        this.currentTagId = tagID;
        if (this._isInTemplate()) {
            this.tmplCount++;
        }
        this.handler.onItemPush(element, tagID, true);
    }
    pop() {
        const popped = this.current;
        if (this.tmplCount > 0 && this._isInTemplate()) {
            this.tmplCount--;
        }
        this.stackTop--;
        this._updateCurrentElement();
        this.handler.onItemPop(popped, true);
    }
    replace(oldElement, newElement) {
        const idx = this._indexOf(oldElement);
        this.items[idx] = newElement;
        if (idx === this.stackTop) {
            this.current = newElement;
        }
    }
    insertAfter(referenceElement, newElement, newElementID) {
        const insertionIdx = this._indexOf(referenceElement) + 1;
        this.items.splice(insertionIdx, 0, newElement);
        this.tagIDs.splice(insertionIdx, 0, newElementID);
        this.stackTop++;
        if (insertionIdx === this.stackTop) {
            this._updateCurrentElement();
        }
        this.handler.onItemPush(this.current, this.currentTagId, insertionIdx === this.stackTop);
    }
    popUntilTagNamePopped(tagName) {
        let targetIdx = this.stackTop + 1;
        do {
            targetIdx = this.tagIDs.lastIndexOf(tagName, targetIdx - 1);
        } while (targetIdx > 0 && this.treeAdapter.getNamespaceURI(this.items[targetIdx]) !== NS.HTML);
        this.shortenToLength(targetIdx < 0 ? 0 : targetIdx);
    }
    shortenToLength(idx) {
        while (this.stackTop >= idx) {
            const popped = this.current;
            if (this.tmplCount > 0 && this._isInTemplate()) {
                this.tmplCount -= 1;
            }
            this.stackTop--;
            this._updateCurrentElement();
            this.handler.onItemPop(popped, this.stackTop < idx);
        }
    }
    popUntilElementPopped(element) {
        const idx = this._indexOf(element);
        this.shortenToLength(idx < 0 ? 0 : idx);
    }
    popUntilPopped(tagNames, targetNS) {
        const idx = this._indexOfTagNames(tagNames, targetNS);
        this.shortenToLength(idx < 0 ? 0 : idx);
    }
    popUntilNumberedHeaderPopped() {
        this.popUntilPopped(NUMBERED_HEADERS, NS.HTML);
    }
    popUntilTableCellPopped() {
        this.popUntilPopped(TABLE_CELLS, NS.HTML);
    }
    popAllUpToHtmlElement() {
        //NOTE: here we assume that the root <html> element is always first in the open element stack, so
        //we perform this fast stack clean up.
        this.tmplCount = 0;
        this.shortenToLength(1);
    }
    _indexOfTagNames(tagNames, namespace) {
        for (let i = this.stackTop; i >= 0; i--) {
            if (tagNames.has(this.tagIDs[i]) && this.treeAdapter.getNamespaceURI(this.items[i]) === namespace) {
                return i;
            }
        }
        return -1;
    }
    clearBackTo(tagNames, targetNS) {
        const idx = this._indexOfTagNames(tagNames, targetNS);
        this.shortenToLength(idx + 1);
    }
    clearBackToTableContext() {
        this.clearBackTo(TABLE_CONTEXT, NS.HTML);
    }
    clearBackToTableBodyContext() {
        this.clearBackTo(TABLE_BODY_CONTEXT, NS.HTML);
    }
    clearBackToTableRowContext() {
        this.clearBackTo(TABLE_ROW_CONTEXT, NS.HTML);
    }
    remove(element) {
        const idx = this._indexOf(element);
        if (idx >= 0) {
            if (idx === this.stackTop) {
                this.pop();
            }
            else {
                this.items.splice(idx, 1);
                this.tagIDs.splice(idx, 1);
                this.stackTop--;
                this._updateCurrentElement();
                this.handler.onItemPop(element, false);
            }
        }
    }
    //Search
    tryPeekProperlyNestedBodyElement() {
        //Properly nested <body> element (should be second element in stack).
        return this.stackTop >= 1 && this.tagIDs[1] === TAG_ID.BODY ? this.items[1] : null;
    }
    contains(element) {
        return this._indexOf(element) > -1;
    }
    getCommonAncestor(element) {
        const elementIdx = this._indexOf(element) - 1;
        return elementIdx >= 0 ? this.items[elementIdx] : null;
    }
    isRootHtmlElementCurrent() {
        return this.stackTop === 0 && this.tagIDs[0] === TAG_ID.HTML;
    }
    //Element in scope
    hasInDynamicScope(tagName, htmlScope) {
        for (let i = this.stackTop; i >= 0; i--) {
            const tn = this.tagIDs[i];
            switch (this.treeAdapter.getNamespaceURI(this.items[i])) {
                case NS.HTML: {
                    if (tn === tagName)
                        return true;
                    if (htmlScope.has(tn))
                        return false;
                    break;
                }
                case NS.SVG: {
                    if (SCOPING_ELEMENTS_SVG.has(tn))
                        return false;
                    break;
                }
                case NS.MATHML: {
                    if (SCOPING_ELEMENTS_MATHML.has(tn))
                        return false;
                    break;
                }
            }
        }
        return true;
    }
    hasInScope(tagName) {
        return this.hasInDynamicScope(tagName, SCOPING_ELEMENTS_HTML);
    }
    hasInListItemScope(tagName) {
        return this.hasInDynamicScope(tagName, SCOPING_ELEMENTS_HTML_LIST);
    }
    hasInButtonScope(tagName) {
        return this.hasInDynamicScope(tagName, SCOPING_ELEMENTS_HTML_BUTTON);
    }
    hasNumberedHeaderInScope() {
        for (let i = this.stackTop; i >= 0; i--) {
            const tn = this.tagIDs[i];
            switch (this.treeAdapter.getNamespaceURI(this.items[i])) {
                case NS.HTML: {
                    if (NUMBERED_HEADERS.has(tn))
                        return true;
                    if (SCOPING_ELEMENTS_HTML.has(tn))
                        return false;
                    break;
                }
                case NS.SVG: {
                    if (SCOPING_ELEMENTS_SVG.has(tn))
                        return false;
                    break;
                }
                case NS.MATHML: {
                    if (SCOPING_ELEMENTS_MATHML.has(tn))
                        return false;
                    break;
                }
            }
        }
        return true;
    }
    hasInTableScope(tagName) {
        for (let i = this.stackTop; i >= 0; i--) {
            if (this.treeAdapter.getNamespaceURI(this.items[i]) !== NS.HTML) {
                continue;
            }
            switch (this.tagIDs[i]) {
                case tagName: {
                    return true;
                }
                case TAG_ID.TABLE:
                case TAG_ID.HTML: {
                    return false;
                }
            }
        }
        return true;
    }
    hasTableBodyContextInTableScope() {
        for (let i = this.stackTop; i >= 0; i--) {
            if (this.treeAdapter.getNamespaceURI(this.items[i]) !== NS.HTML) {
                continue;
            }
            switch (this.tagIDs[i]) {
                case TAG_ID.TBODY:
                case TAG_ID.THEAD:
                case TAG_ID.TFOOT: {
                    return true;
                }
                case TAG_ID.TABLE:
                case TAG_ID.HTML: {
                    return false;
                }
            }
        }
        return true;
    }
    hasInSelectScope(tagName) {
        for (let i = this.stackTop; i >= 0; i--) {
            if (this.treeAdapter.getNamespaceURI(this.items[i]) !== NS.HTML) {
                continue;
            }
            switch (this.tagIDs[i]) {
                case tagName: {
                    return true;
                }
                case TAG_ID.OPTION:
                case TAG_ID.OPTGROUP: {
                    break;
                }
                default: {
                    return false;
                }
            }
        }
        return true;
    }
    //Implied end tags
    generateImpliedEndTags() {
        while (IMPLICIT_END_TAG_REQUIRED.has(this.currentTagId)) {
            this.pop();
        }
    }
    generateImpliedEndTagsThoroughly() {
        while (IMPLICIT_END_TAG_REQUIRED_THOROUGHLY.has(this.currentTagId)) {
            this.pop();
        }
    }
    generateImpliedEndTagsWithExclusion(exclusionId) {
        while (this.currentTagId !== exclusionId && IMPLICIT_END_TAG_REQUIRED_THOROUGHLY.has(this.currentTagId)) {
            this.pop();
        }
    }
}

//Const
const NOAH_ARK_CAPACITY = 3;
var EntryType;
(function (EntryType) {
    EntryType[EntryType["Marker"] = 0] = "Marker";
    EntryType[EntryType["Element"] = 1] = "Element";
})(EntryType || (EntryType = {}));
const MARKER = { type: EntryType.Marker };
//List of formatting elements
class FormattingElementList {
    constructor(treeAdapter) {
        this.treeAdapter = treeAdapter;
        this.entries = [];
        this.bookmark = null;
    }
    //Noah Ark's condition
    //OPTIMIZATION: at first we try to find possible candidates for exclusion using
    //lightweight heuristics without thorough attributes check.
    _getNoahArkConditionCandidates(newElement, neAttrs) {
        const candidates = [];
        const neAttrsLength = neAttrs.length;
        const neTagName = this.treeAdapter.getTagName(newElement);
        const neNamespaceURI = this.treeAdapter.getNamespaceURI(newElement);
        for (let i = 0; i < this.entries.length; i++) {
            const entry = this.entries[i];
            if (entry.type === EntryType.Marker) {
                break;
            }
            const { element } = entry;
            if (this.treeAdapter.getTagName(element) === neTagName &&
                this.treeAdapter.getNamespaceURI(element) === neNamespaceURI) {
                const elementAttrs = this.treeAdapter.getAttrList(element);
                if (elementAttrs.length === neAttrsLength) {
                    candidates.push({ idx: i, attrs: elementAttrs });
                }
            }
        }
        return candidates;
    }
    _ensureNoahArkCondition(newElement) {
        if (this.entries.length < NOAH_ARK_CAPACITY)
            return;
        const neAttrs = this.treeAdapter.getAttrList(newElement);
        const candidates = this._getNoahArkConditionCandidates(newElement, neAttrs);
        if (candidates.length < NOAH_ARK_CAPACITY)
            return;
        //NOTE: build attrs map for the new element, so we can perform fast lookups
        const neAttrsMap = new Map(neAttrs.map((neAttr) => [neAttr.name, neAttr.value]));
        let validCandidates = 0;
        //NOTE: remove bottommost candidates, until Noah's Ark condition will not be met
        for (let i = 0; i < candidates.length; i++) {
            const candidate = candidates[i];
            // We know that `candidate.attrs.length === neAttrs.length`
            if (candidate.attrs.every((cAttr) => neAttrsMap.get(cAttr.name) === cAttr.value)) {
                validCandidates += 1;
                if (validCandidates >= NOAH_ARK_CAPACITY) {
                    this.entries.splice(candidate.idx, 1);
                }
            }
        }
    }
    //Mutations
    insertMarker() {
        this.entries.unshift(MARKER);
    }
    pushElement(element, token) {
        this._ensureNoahArkCondition(element);
        this.entries.unshift({
            type: EntryType.Element,
            element,
            token,
        });
    }
    insertElementAfterBookmark(element, token) {
        const bookmarkIdx = this.entries.indexOf(this.bookmark);
        this.entries.splice(bookmarkIdx, 0, {
            type: EntryType.Element,
            element,
            token,
        });
    }
    removeEntry(entry) {
        const entryIndex = this.entries.indexOf(entry);
        if (entryIndex >= 0) {
            this.entries.splice(entryIndex, 1);
        }
    }
    /**
     * Clears the list of formatting elements up to the last marker.
     *
     * @see https://html.spec.whatwg.org/multipage/parsing.html#clear-the-list-of-active-formatting-elements-up-to-the-last-marker
     */
    clearToLastMarker() {
        const markerIdx = this.entries.indexOf(MARKER);
        if (markerIdx >= 0) {
            this.entries.splice(0, markerIdx + 1);
        }
        else {
            this.entries.length = 0;
        }
    }
    //Search
    getElementEntryInScopeWithTagName(tagName) {
        const entry = this.entries.find((entry) => entry.type === EntryType.Marker || this.treeAdapter.getTagName(entry.element) === tagName);
        return entry && entry.type === EntryType.Element ? entry : null;
    }
    getElementEntry(element) {
        return this.entries.find((entry) => entry.type === EntryType.Element && entry.element === element);
    }
}

const defaultTreeAdapter = {
    //Node construction
    createDocument() {
        return {
            nodeName: '#document',
            mode: DOCUMENT_MODE.NO_QUIRKS,
            childNodes: [],
        };
    },
    createDocumentFragment() {
        return {
            nodeName: '#document-fragment',
            childNodes: [],
        };
    },
    createElement(tagName, namespaceURI, attrs) {
        return {
            nodeName: tagName,
            tagName,
            attrs,
            namespaceURI,
            childNodes: [],
            parentNode: null,
        };
    },
    createCommentNode(data) {
        return {
            nodeName: '#comment',
            data,
            parentNode: null,
        };
    },
    createTextNode(value) {
        return {
            nodeName: '#text',
            value,
            parentNode: null,
        };
    },
    //Tree mutation
    appendChild(parentNode, newNode) {
        parentNode.childNodes.push(newNode);
        newNode.parentNode = parentNode;
    },
    insertBefore(parentNode, newNode, referenceNode) {
        const insertionIdx = parentNode.childNodes.indexOf(referenceNode);
        parentNode.childNodes.splice(insertionIdx, 0, newNode);
        newNode.parentNode = parentNode;
    },
    setTemplateContent(templateElement, contentElement) {
        templateElement.content = contentElement;
    },
    getTemplateContent(templateElement) {
        return templateElement.content;
    },
    setDocumentType(document, name, publicId, systemId) {
        const doctypeNode = document.childNodes.find((node) => node.nodeName === '#documentType');
        if (doctypeNode) {
            doctypeNode.name = name;
            doctypeNode.publicId = publicId;
            doctypeNode.systemId = systemId;
        }
        else {
            const node = {
                nodeName: '#documentType',
                name,
                publicId,
                systemId,
                parentNode: null,
            };
            defaultTreeAdapter.appendChild(document, node);
        }
    },
    setDocumentMode(document, mode) {
        document.mode = mode;
    },
    getDocumentMode(document) {
        return document.mode;
    },
    detachNode(node) {
        if (node.parentNode) {
            const idx = node.parentNode.childNodes.indexOf(node);
            node.parentNode.childNodes.splice(idx, 1);
            node.parentNode = null;
        }
    },
    insertText(parentNode, text) {
        if (parentNode.childNodes.length > 0) {
            const prevNode = parentNode.childNodes[parentNode.childNodes.length - 1];
            if (defaultTreeAdapter.isTextNode(prevNode)) {
                prevNode.value += text;
                return;
            }
        }
        defaultTreeAdapter.appendChild(parentNode, defaultTreeAdapter.createTextNode(text));
    },
    insertTextBefore(parentNode, text, referenceNode) {
        const prevNode = parentNode.childNodes[parentNode.childNodes.indexOf(referenceNode) - 1];
        if (prevNode && defaultTreeAdapter.isTextNode(prevNode)) {
            prevNode.value += text;
        }
        else {
            defaultTreeAdapter.insertBefore(parentNode, defaultTreeAdapter.createTextNode(text), referenceNode);
        }
    },
    adoptAttributes(recipient, attrs) {
        const recipientAttrsMap = new Set(recipient.attrs.map((attr) => attr.name));
        for (let j = 0; j < attrs.length; j++) {
            if (!recipientAttrsMap.has(attrs[j].name)) {
                recipient.attrs.push(attrs[j]);
            }
        }
    },
    //Tree traversing
    getFirstChild(node) {
        return node.childNodes[0];
    },
    getChildNodes(node) {
        return node.childNodes;
    },
    getParentNode(node) {
        return node.parentNode;
    },
    getAttrList(element) {
        return element.attrs;
    },
    //Node data
    getTagName(element) {
        return element.tagName;
    },
    getNamespaceURI(element) {
        return element.namespaceURI;
    },
    getTextNodeContent(textNode) {
        return textNode.value;
    },
    getCommentNodeContent(commentNode) {
        return commentNode.data;
    },
    getDocumentTypeNodeName(doctypeNode) {
        return doctypeNode.name;
    },
    getDocumentTypeNodePublicId(doctypeNode) {
        return doctypeNode.publicId;
    },
    getDocumentTypeNodeSystemId(doctypeNode) {
        return doctypeNode.systemId;
    },
    //Node types
    isTextNode(node) {
        return node.nodeName === '#text';
    },
    isCommentNode(node) {
        return node.nodeName === '#comment';
    },
    isDocumentTypeNode(node) {
        return node.nodeName === '#documentType';
    },
    isElementNode(node) {
        return Object.prototype.hasOwnProperty.call(node, 'tagName');
    },
    // Source code location
    setNodeSourceCodeLocation(node, location) {
        node.sourceCodeLocation = location;
    },
    getNodeSourceCodeLocation(node) {
        return node.sourceCodeLocation;
    },
    updateNodeSourceCodeLocation(node, endLocation) {
        node.sourceCodeLocation = { ...node.sourceCodeLocation, ...endLocation };
    },
};

//Const
const VALID_DOCTYPE_NAME = 'html';
const VALID_SYSTEM_ID = 'about:legacy-compat';
const QUIRKS_MODE_SYSTEM_ID = 'http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd';
const QUIRKS_MODE_PUBLIC_ID_PREFIXES = [
    '+//silmaril//dtd html pro v0r11 19970101//',
    '-//as//dtd html 3.0 aswedit + extensions//',
    '-//advasoft ltd//dtd html 3.0 aswedit + extensions//',
    '-//ietf//dtd html 2.0 level 1//',
    '-//ietf//dtd html 2.0 level 2//',
    '-//ietf//dtd html 2.0 strict level 1//',
    '-//ietf//dtd html 2.0 strict level 2//',
    '-//ietf//dtd html 2.0 strict//',
    '-//ietf//dtd html 2.0//',
    '-//ietf//dtd html 2.1e//',
    '-//ietf//dtd html 3.0//',
    '-//ietf//dtd html 3.2 final//',
    '-//ietf//dtd html 3.2//',
    '-//ietf//dtd html 3//',
    '-//ietf//dtd html level 0//',
    '-//ietf//dtd html level 1//',
    '-//ietf//dtd html level 2//',
    '-//ietf//dtd html level 3//',
    '-//ietf//dtd html strict level 0//',
    '-//ietf//dtd html strict level 1//',
    '-//ietf//dtd html strict level 2//',
    '-//ietf//dtd html strict level 3//',
    '-//ietf//dtd html strict//',
    '-//ietf//dtd html//',
    '-//metrius//dtd metrius presentational//',
    '-//microsoft//dtd internet explorer 2.0 html strict//',
    '-//microsoft//dtd internet explorer 2.0 html//',
    '-//microsoft//dtd internet explorer 2.0 tables//',
    '-//microsoft//dtd internet explorer 3.0 html strict//',
    '-//microsoft//dtd internet explorer 3.0 html//',
    '-//microsoft//dtd internet explorer 3.0 tables//',
    '-//netscape comm. corp.//dtd html//',
    '-//netscape comm. corp.//dtd strict html//',
    "-//o'reilly and associates//dtd html 2.0//",
    "-//o'reilly and associates//dtd html extended 1.0//",
    "-//o'reilly and associates//dtd html extended relaxed 1.0//",
    '-//sq//dtd html 2.0 hotmetal + extensions//',
    '-//softquad software//dtd hotmetal pro 6.0::19990601::extensions to html 4.0//',
    '-//softquad//dtd hotmetal pro 4.0::19971010::extensions to html 4.0//',
    '-//spyglass//dtd html 2.0 extended//',
    '-//sun microsystems corp.//dtd hotjava html//',
    '-//sun microsystems corp.//dtd hotjava strict html//',
    '-//w3c//dtd html 3 1995-03-24//',
    '-//w3c//dtd html 3.2 draft//',
    '-//w3c//dtd html 3.2 final//',
    '-//w3c//dtd html 3.2//',
    '-//w3c//dtd html 3.2s draft//',
    '-//w3c//dtd html 4.0 frameset//',
    '-//w3c//dtd html 4.0 transitional//',
    '-//w3c//dtd html experimental 19960712//',
    '-//w3c//dtd html experimental 970421//',
    '-//w3c//dtd w3 html//',
    '-//w3o//dtd w3 html 3.0//',
    '-//webtechs//dtd mozilla html 2.0//',
    '-//webtechs//dtd mozilla html//',
];
const QUIRKS_MODE_NO_SYSTEM_ID_PUBLIC_ID_PREFIXES = [
    ...QUIRKS_MODE_PUBLIC_ID_PREFIXES,
    '-//w3c//dtd html 4.01 frameset//',
    '-//w3c//dtd html 4.01 transitional//',
];
const QUIRKS_MODE_PUBLIC_IDS = new Set([
    '-//w3o//dtd w3 html strict 3.0//en//',
    '-/w3c/dtd html 4.0 transitional/en',
    'html',
]);
const LIMITED_QUIRKS_PUBLIC_ID_PREFIXES = ['-//w3c//dtd xhtml 1.0 frameset//', '-//w3c//dtd xhtml 1.0 transitional//'];
const LIMITED_QUIRKS_WITH_SYSTEM_ID_PUBLIC_ID_PREFIXES = [
    ...LIMITED_QUIRKS_PUBLIC_ID_PREFIXES,
    '-//w3c//dtd html 4.01 frameset//',
    '-//w3c//dtd html 4.01 transitional//',
];
//Utils
function hasPrefix(publicId, prefixes) {
    return prefixes.some((prefix) => publicId.startsWith(prefix));
}
//API
function isConforming(token) {
    return (token.name === VALID_DOCTYPE_NAME &&
        token.publicId === null &&
        (token.systemId === null || token.systemId === VALID_SYSTEM_ID));
}
function getDocumentMode(token) {
    if (token.name !== VALID_DOCTYPE_NAME) {
        return DOCUMENT_MODE.QUIRKS;
    }
    const { systemId } = token;
    if (systemId && systemId.toLowerCase() === QUIRKS_MODE_SYSTEM_ID) {
        return DOCUMENT_MODE.QUIRKS;
    }
    let { publicId } = token;
    if (publicId !== null) {
        publicId = publicId.toLowerCase();
        if (QUIRKS_MODE_PUBLIC_IDS.has(publicId)) {
            return DOCUMENT_MODE.QUIRKS;
        }
        let prefixes = systemId === null ? QUIRKS_MODE_NO_SYSTEM_ID_PUBLIC_ID_PREFIXES : QUIRKS_MODE_PUBLIC_ID_PREFIXES;
        if (hasPrefix(publicId, prefixes)) {
            return DOCUMENT_MODE.QUIRKS;
        }
        prefixes =
            systemId === null ? LIMITED_QUIRKS_PUBLIC_ID_PREFIXES : LIMITED_QUIRKS_WITH_SYSTEM_ID_PUBLIC_ID_PREFIXES;
        if (hasPrefix(publicId, prefixes)) {
            return DOCUMENT_MODE.LIMITED_QUIRKS;
        }
    }
    return DOCUMENT_MODE.NO_QUIRKS;
}

//MIME types
const MIME_TYPES = {
    TEXT_HTML: 'text/html',
    APPLICATION_XML: 'application/xhtml+xml',
};
//Attributes
const DEFINITION_URL_ATTR = 'definitionurl';
const ADJUSTED_DEFINITION_URL_ATTR = 'definitionURL';
const SVG_ATTRS_ADJUSTMENT_MAP = new Map([
    'attributeName',
    'attributeType',
    'baseFrequency',
    'baseProfile',
    'calcMode',
    'clipPathUnits',
    'diffuseConstant',
    'edgeMode',
    'filterUnits',
    'glyphRef',
    'gradientTransform',
    'gradientUnits',
    'kernelMatrix',
    'kernelUnitLength',
    'keyPoints',
    'keySplines',
    'keyTimes',
    'lengthAdjust',
    'limitingConeAngle',
    'markerHeight',
    'markerUnits',
    'markerWidth',
    'maskContentUnits',
    'maskUnits',
    'numOctaves',
    'pathLength',
    'patternContentUnits',
    'patternTransform',
    'patternUnits',
    'pointsAtX',
    'pointsAtY',
    'pointsAtZ',
    'preserveAlpha',
    'preserveAspectRatio',
    'primitiveUnits',
    'refX',
    'refY',
    'repeatCount',
    'repeatDur',
    'requiredExtensions',
    'requiredFeatures',
    'specularConstant',
    'specularExponent',
    'spreadMethod',
    'startOffset',
    'stdDeviation',
    'stitchTiles',
    'surfaceScale',
    'systemLanguage',
    'tableValues',
    'targetX',
    'targetY',
    'textLength',
    'viewBox',
    'viewTarget',
    'xChannelSelector',
    'yChannelSelector',
    'zoomAndPan',
].map((attr) => [attr.toLowerCase(), attr]));
const XML_ATTRS_ADJUSTMENT_MAP = new Map([
    ['xlink:actuate', { prefix: 'xlink', name: 'actuate', namespace: NS.XLINK }],
    ['xlink:arcrole', { prefix: 'xlink', name: 'arcrole', namespace: NS.XLINK }],
    ['xlink:href', { prefix: 'xlink', name: 'href', namespace: NS.XLINK }],
    ['xlink:role', { prefix: 'xlink', name: 'role', namespace: NS.XLINK }],
    ['xlink:show', { prefix: 'xlink', name: 'show', namespace: NS.XLINK }],
    ['xlink:title', { prefix: 'xlink', name: 'title', namespace: NS.XLINK }],
    ['xlink:type', { prefix: 'xlink', name: 'type', namespace: NS.XLINK }],
    ['xml:lang', { prefix: 'xml', name: 'lang', namespace: NS.XML }],
    ['xml:space', { prefix: 'xml', name: 'space', namespace: NS.XML }],
    ['xmlns', { prefix: '', name: 'xmlns', namespace: NS.XMLNS }],
    ['xmlns:xlink', { prefix: 'xmlns', name: 'xlink', namespace: NS.XMLNS }],
]);
//SVG tag names adjustment map
const SVG_TAG_NAMES_ADJUSTMENT_MAP = new Map([
    'altGlyph',
    'altGlyphDef',
    'altGlyphItem',
    'animateColor',
    'animateMotion',
    'animateTransform',
    'clipPath',
    'feBlend',
    'feColorMatrix',
    'feComponentTransfer',
    'feComposite',
    'feConvolveMatrix',
    'feDiffuseLighting',
    'feDisplacementMap',
    'feDistantLight',
    'feFlood',
    'feFuncA',
    'feFuncB',
    'feFuncG',
    'feFuncR',
    'feGaussianBlur',
    'feImage',
    'feMerge',
    'feMergeNode',
    'feMorphology',
    'feOffset',
    'fePointLight',
    'feSpecularLighting',
    'feSpotLight',
    'feTile',
    'feTurbulence',
    'foreignObject',
    'glyphRef',
    'linearGradient',
    'radialGradient',
    'textPath',
].map((tn) => [tn.toLowerCase(), tn]));
//Tags that causes exit from foreign content
const EXITS_FOREIGN_CONTENT = new Set([
    TAG_ID.B,
    TAG_ID.BIG,
    TAG_ID.BLOCKQUOTE,
    TAG_ID.BODY,
    TAG_ID.BR,
    TAG_ID.CENTER,
    TAG_ID.CODE,
    TAG_ID.DD,
    TAG_ID.DIV,
    TAG_ID.DL,
    TAG_ID.DT,
    TAG_ID.EM,
    TAG_ID.EMBED,
    TAG_ID.H1,
    TAG_ID.H2,
    TAG_ID.H3,
    TAG_ID.H4,
    TAG_ID.H5,
    TAG_ID.H6,
    TAG_ID.HEAD,
    TAG_ID.HR,
    TAG_ID.I,
    TAG_ID.IMG,
    TAG_ID.LI,
    TAG_ID.LISTING,
    TAG_ID.MENU,
    TAG_ID.META,
    TAG_ID.NOBR,
    TAG_ID.OL,
    TAG_ID.P,
    TAG_ID.PRE,
    TAG_ID.RUBY,
    TAG_ID.S,
    TAG_ID.SMALL,
    TAG_ID.SPAN,
    TAG_ID.STRONG,
    TAG_ID.STRIKE,
    TAG_ID.SUB,
    TAG_ID.SUP,
    TAG_ID.TABLE,
    TAG_ID.TT,
    TAG_ID.U,
    TAG_ID.UL,
    TAG_ID.VAR,
]);
//Check exit from foreign content
function causesExit(startTagToken) {
    const tn = startTagToken.tagID;
    const isFontWithAttrs = tn === TAG_ID.FONT &&
        startTagToken.attrs.some(({ name }) => name === ATTRS.COLOR || name === ATTRS.SIZE || name === ATTRS.FACE);
    return isFontWithAttrs || EXITS_FOREIGN_CONTENT.has(tn);
}
//Token adjustments
function adjustTokenMathMLAttrs(token) {
    for (let i = 0; i < token.attrs.length; i++) {
        if (token.attrs[i].name === DEFINITION_URL_ATTR) {
            token.attrs[i].name = ADJUSTED_DEFINITION_URL_ATTR;
            break;
        }
    }
}
function adjustTokenSVGAttrs(token) {
    for (let i = 0; i < token.attrs.length; i++) {
        const adjustedAttrName = SVG_ATTRS_ADJUSTMENT_MAP.get(token.attrs[i].name);
        if (adjustedAttrName != null) {
            token.attrs[i].name = adjustedAttrName;
        }
    }
}
function adjustTokenXMLAttrs(token) {
    for (let i = 0; i < token.attrs.length; i++) {
        const adjustedAttrEntry = XML_ATTRS_ADJUSTMENT_MAP.get(token.attrs[i].name);
        if (adjustedAttrEntry) {
            token.attrs[i].prefix = adjustedAttrEntry.prefix;
            token.attrs[i].name = adjustedAttrEntry.name;
            token.attrs[i].namespace = adjustedAttrEntry.namespace;
        }
    }
}
function adjustTokenSVGTagName(token) {
    const adjustedTagName = SVG_TAG_NAMES_ADJUSTMENT_MAP.get(token.tagName);
    if (adjustedTagName != null) {
        token.tagName = adjustedTagName;
        token.tagID = getTagID(token.tagName);
    }
}
//Integration points
function isMathMLTextIntegrationPoint(tn, ns) {
    return ns === NS.MATHML && (tn === TAG_ID.MI || tn === TAG_ID.MO || tn === TAG_ID.MN || tn === TAG_ID.MS || tn === TAG_ID.MTEXT);
}
function isHtmlIntegrationPoint(tn, ns, attrs) {
    if (ns === NS.MATHML && tn === TAG_ID.ANNOTATION_XML) {
        for (let i = 0; i < attrs.length; i++) {
            if (attrs[i].name === ATTRS.ENCODING) {
                const value = attrs[i].value.toLowerCase();
                return value === MIME_TYPES.TEXT_HTML || value === MIME_TYPES.APPLICATION_XML;
            }
        }
    }
    return ns === NS.SVG && (tn === TAG_ID.FOREIGN_OBJECT || tn === TAG_ID.DESC || tn === TAG_ID.TITLE);
}
function isIntegrationPoint(tn, ns, attrs, foreignNS) {
    return (((!foreignNS || foreignNS === NS.HTML) && isHtmlIntegrationPoint(tn, ns, attrs)) ||
        ((!foreignNS || foreignNS === NS.MATHML) && isMathMLTextIntegrationPoint(tn, ns)));
}

//Misc constants
const HIDDEN_INPUT_TYPE = 'hidden';
//Adoption agency loops iteration count
const AA_OUTER_LOOP_ITER = 8;
const AA_INNER_LOOP_ITER = 3;
//Insertion modes
var InsertionMode;
(function (InsertionMode) {
    InsertionMode[InsertionMode["INITIAL"] = 0] = "INITIAL";
    InsertionMode[InsertionMode["BEFORE_HTML"] = 1] = "BEFORE_HTML";
    InsertionMode[InsertionMode["BEFORE_HEAD"] = 2] = "BEFORE_HEAD";
    InsertionMode[InsertionMode["IN_HEAD"] = 3] = "IN_HEAD";
    InsertionMode[InsertionMode["IN_HEAD_NO_SCRIPT"] = 4] = "IN_HEAD_NO_SCRIPT";
    InsertionMode[InsertionMode["AFTER_HEAD"] = 5] = "AFTER_HEAD";
    InsertionMode[InsertionMode["IN_BODY"] = 6] = "IN_BODY";
    InsertionMode[InsertionMode["TEXT"] = 7] = "TEXT";
    InsertionMode[InsertionMode["IN_TABLE"] = 8] = "IN_TABLE";
    InsertionMode[InsertionMode["IN_TABLE_TEXT"] = 9] = "IN_TABLE_TEXT";
    InsertionMode[InsertionMode["IN_CAPTION"] = 10] = "IN_CAPTION";
    InsertionMode[InsertionMode["IN_COLUMN_GROUP"] = 11] = "IN_COLUMN_GROUP";
    InsertionMode[InsertionMode["IN_TABLE_BODY"] = 12] = "IN_TABLE_BODY";
    InsertionMode[InsertionMode["IN_ROW"] = 13] = "IN_ROW";
    InsertionMode[InsertionMode["IN_CELL"] = 14] = "IN_CELL";
    InsertionMode[InsertionMode["IN_SELECT"] = 15] = "IN_SELECT";
    InsertionMode[InsertionMode["IN_SELECT_IN_TABLE"] = 16] = "IN_SELECT_IN_TABLE";
    InsertionMode[InsertionMode["IN_TEMPLATE"] = 17] = "IN_TEMPLATE";
    InsertionMode[InsertionMode["AFTER_BODY"] = 18] = "AFTER_BODY";
    InsertionMode[InsertionMode["IN_FRAMESET"] = 19] = "IN_FRAMESET";
    InsertionMode[InsertionMode["AFTER_FRAMESET"] = 20] = "AFTER_FRAMESET";
    InsertionMode[InsertionMode["AFTER_AFTER_BODY"] = 21] = "AFTER_AFTER_BODY";
    InsertionMode[InsertionMode["AFTER_AFTER_FRAMESET"] = 22] = "AFTER_AFTER_FRAMESET";
})(InsertionMode || (InsertionMode = {}));
const BASE_LOC = {
    startLine: -1,
    startCol: -1,
    startOffset: -1,
    endLine: -1,
    endCol: -1,
    endOffset: -1,
};
const TABLE_STRUCTURE_TAGS = new Set([TAG_ID.TABLE, TAG_ID.TBODY, TAG_ID.TFOOT, TAG_ID.THEAD, TAG_ID.TR]);
const defaultParserOptions = {
    scriptingEnabled: true,
    sourceCodeLocationInfo: false,
    treeAdapter: defaultTreeAdapter,
    onParseError: null,
};
//Parser
class Parser {
    constructor(options, document, 
    /** @internal */
    fragmentContext = null, 
    /** @internal */
    scriptHandler = null) {
        this.fragmentContext = fragmentContext;
        this.scriptHandler = scriptHandler;
        this.currentToken = null;
        this.stopped = false;
        /** @internal */
        this.insertionMode = InsertionMode.INITIAL;
        /** @internal */
        this.originalInsertionMode = InsertionMode.INITIAL;
        /** @internal */
        this.headElement = null;
        /** @internal */
        this.formElement = null;
        /** Indicates that the current node is not an element in the HTML namespace */
        this.currentNotInHTML = false;
        /**
         * The template insertion mode stack is maintained from the left.
         * Ie. the topmost element will always have index 0.
         *
         * @internal
         */
        this.tmplInsertionModeStack = [];
        /** @internal */
        this.pendingCharacterTokens = [];
        /** @internal */
        this.hasNonWhitespacePendingCharacterToken = false;
        /** @internal */
        this.framesetOk = true;
        /** @internal */
        this.skipNextNewLine = false;
        /** @internal */
        this.fosterParentingEnabled = false;
        this.options = {
            ...defaultParserOptions,
            ...options,
        };
        this.treeAdapter = this.options.treeAdapter;
        this.onParseError = this.options.onParseError;
        // Always enable location info if we report parse errors.
        if (this.onParseError) {
            this.options.sourceCodeLocationInfo = true;
        }
        this.document = document !== null && document !== void 0 ? document : this.treeAdapter.createDocument();
        this.tokenizer = new Tokenizer(this.options, this);
        this.activeFormattingElements = new FormattingElementList(this.treeAdapter);
        this.fragmentContextID = fragmentContext ? getTagID(this.treeAdapter.getTagName(fragmentContext)) : TAG_ID.UNKNOWN;
        this._setContextModes(fragmentContext !== null && fragmentContext !== void 0 ? fragmentContext : this.document, this.fragmentContextID);
        this.openElements = new OpenElementStack(this.document, this.treeAdapter, this);
    }
    // API
    static parse(html, options) {
        const parser = new this(options);
        parser.tokenizer.write(html, true);
        return parser.document;
    }
    static getFragmentParser(fragmentContext, options) {
        const opts = {
            ...defaultParserOptions,
            ...options,
        };
        //NOTE: use a <template> element as the fragment context if no context element was provided,
        //so we will parse in a "forgiving" manner
        fragmentContext !== null && fragmentContext !== void 0 ? fragmentContext : (fragmentContext = opts.treeAdapter.createElement(TAG_NAMES.TEMPLATE, NS.HTML, []));
        //NOTE: create a fake element which will be used as the `document` for fragment parsing.
        //This is important for jsdom, where a new `document` cannot be created. This led to
        //fragment parsing messing with the main `document`.
        const documentMock = opts.treeAdapter.createElement('documentmock', NS.HTML, []);
        const parser = new this(opts, documentMock, fragmentContext);
        if (parser.fragmentContextID === TAG_ID.TEMPLATE) {
            parser.tmplInsertionModeStack.unshift(InsertionMode.IN_TEMPLATE);
        }
        parser._initTokenizerForFragmentParsing();
        parser._insertFakeRootElement();
        parser._resetInsertionMode();
        parser._findFormInFragmentContext();
        return parser;
    }
    getFragment() {
        const rootElement = this.treeAdapter.getFirstChild(this.document);
        const fragment = this.treeAdapter.createDocumentFragment();
        this._adoptNodes(rootElement, fragment);
        return fragment;
    }
    //Errors
    /** @internal */
    _err(token, code, beforeToken) {
        var _a;
        if (!this.onParseError)
            return;
        const loc = (_a = token.location) !== null && _a !== void 0 ? _a : BASE_LOC;
        const err = {
            code,
            startLine: loc.startLine,
            startCol: loc.startCol,
            startOffset: loc.startOffset,
            endLine: beforeToken ? loc.startLine : loc.endLine,
            endCol: beforeToken ? loc.startCol : loc.endCol,
            endOffset: beforeToken ? loc.startOffset : loc.endOffset,
        };
        this.onParseError(err);
    }
    //Stack events
    /** @internal */
    onItemPush(node, tid, isTop) {
        var _a, _b;
        (_b = (_a = this.treeAdapter).onItemPush) === null || _b === void 0 ? void 0 : _b.call(_a, node);
        if (isTop && this.openElements.stackTop > 0)
            this._setContextModes(node, tid);
    }
    /** @internal */
    onItemPop(node, isTop) {
        var _a, _b;
        if (this.options.sourceCodeLocationInfo) {
            this._setEndLocation(node, this.currentToken);
        }
        (_b = (_a = this.treeAdapter).onItemPop) === null || _b === void 0 ? void 0 : _b.call(_a, node, this.openElements.current);
        if (isTop) {
            let current;
            let currentTagId;
            if (this.openElements.stackTop === 0 && this.fragmentContext) {
                current = this.fragmentContext;
                currentTagId = this.fragmentContextID;
            }
            else {
                ({ current, currentTagId } = this.openElements);
            }
            this._setContextModes(current, currentTagId);
        }
    }
    _setContextModes(current, tid) {
        const isHTML = current === this.document || this.treeAdapter.getNamespaceURI(current) === NS.HTML;
        this.currentNotInHTML = !isHTML;
        this.tokenizer.inForeignNode = !isHTML && !this._isIntegrationPoint(tid, current);
    }
    /** @protected */
    _switchToTextParsing(currentToken, nextTokenizerState) {
        this._insertElement(currentToken, NS.HTML);
        this.tokenizer.state = nextTokenizerState;
        this.originalInsertionMode = this.insertionMode;
        this.insertionMode = InsertionMode.TEXT;
    }
    switchToPlaintextParsing() {
        this.insertionMode = InsertionMode.TEXT;
        this.originalInsertionMode = InsertionMode.IN_BODY;
        this.tokenizer.state = TokenizerMode.PLAINTEXT;
    }
    //Fragment parsing
    /** @protected */
    _getAdjustedCurrentElement() {
        return this.openElements.stackTop === 0 && this.fragmentContext
            ? this.fragmentContext
            : this.openElements.current;
    }
    /** @protected */
    _findFormInFragmentContext() {
        let node = this.fragmentContext;
        while (node) {
            if (this.treeAdapter.getTagName(node) === TAG_NAMES.FORM) {
                this.formElement = node;
                break;
            }
            node = this.treeAdapter.getParentNode(node);
        }
    }
    _initTokenizerForFragmentParsing() {
        if (!this.fragmentContext || this.treeAdapter.getNamespaceURI(this.fragmentContext) !== NS.HTML) {
            return;
        }
        switch (this.fragmentContextID) {
            case TAG_ID.TITLE:
            case TAG_ID.TEXTAREA: {
                this.tokenizer.state = TokenizerMode.RCDATA;
                break;
            }
            case TAG_ID.STYLE:
            case TAG_ID.XMP:
            case TAG_ID.IFRAME:
            case TAG_ID.NOEMBED:
            case TAG_ID.NOFRAMES:
            case TAG_ID.NOSCRIPT: {
                this.tokenizer.state = TokenizerMode.RAWTEXT;
                break;
            }
            case TAG_ID.SCRIPT: {
                this.tokenizer.state = TokenizerMode.SCRIPT_DATA;
                break;
            }
            case TAG_ID.PLAINTEXT: {
                this.tokenizer.state = TokenizerMode.PLAINTEXT;
                break;
            }
            // Do nothing
        }
    }
    //Tree mutation
    /** @protected */
    _setDocumentType(token) {
        const name = token.name || '';
        const publicId = token.publicId || '';
        const systemId = token.systemId || '';
        this.treeAdapter.setDocumentType(this.document, name, publicId, systemId);
        if (token.location) {
            const documentChildren = this.treeAdapter.getChildNodes(this.document);
            const docTypeNode = documentChildren.find((node) => this.treeAdapter.isDocumentTypeNode(node));
            if (docTypeNode) {
                this.treeAdapter.setNodeSourceCodeLocation(docTypeNode, token.location);
            }
        }
    }
    /** @protected */
    _attachElementToTree(element, location) {
        if (this.options.sourceCodeLocationInfo) {
            const loc = location && {
                ...location,
                startTag: location,
            };
            this.treeAdapter.setNodeSourceCodeLocation(element, loc);
        }
        if (this._shouldFosterParentOnInsertion()) {
            this._fosterParentElement(element);
        }
        else {
            const parent = this.openElements.currentTmplContentOrNode;
            this.treeAdapter.appendChild(parent, element);
        }
    }
    /**
     * For self-closing tags. Add an element to the tree, but skip adding it
     * to the stack.
     */
    /** @protected */
    _appendElement(token, namespaceURI) {
        const element = this.treeAdapter.createElement(token.tagName, namespaceURI, token.attrs);
        this._attachElementToTree(element, token.location);
    }
    /** @protected */
    _insertElement(token, namespaceURI) {
        const element = this.treeAdapter.createElement(token.tagName, namespaceURI, token.attrs);
        this._attachElementToTree(element, token.location);
        this.openElements.push(element, token.tagID);
    }
    /** @protected */
    _insertFakeElement(tagName, tagID) {
        const element = this.treeAdapter.createElement(tagName, NS.HTML, []);
        this._attachElementToTree(element, null);
        this.openElements.push(element, tagID);
    }
    /** @protected */
    _insertTemplate(token) {
        const tmpl = this.treeAdapter.createElement(token.tagName, NS.HTML, token.attrs);
        const content = this.treeAdapter.createDocumentFragment();
        this.treeAdapter.setTemplateContent(tmpl, content);
        this._attachElementToTree(tmpl, token.location);
        this.openElements.push(tmpl, token.tagID);
        if (this.options.sourceCodeLocationInfo)
            this.treeAdapter.setNodeSourceCodeLocation(content, null);
    }
    /** @protected */
    _insertFakeRootElement() {
        const element = this.treeAdapter.createElement(TAG_NAMES.HTML, NS.HTML, []);
        if (this.options.sourceCodeLocationInfo)
            this.treeAdapter.setNodeSourceCodeLocation(element, null);
        this.treeAdapter.appendChild(this.openElements.current, element);
        this.openElements.push(element, TAG_ID.HTML);
    }
    /** @protected */
    _appendCommentNode(token, parent) {
        const commentNode = this.treeAdapter.createCommentNode(token.data);
        this.treeAdapter.appendChild(parent, commentNode);
        if (this.options.sourceCodeLocationInfo) {
            this.treeAdapter.setNodeSourceCodeLocation(commentNode, token.location);
        }
    }
    /** @protected */
    _insertCharacters(token) {
        let parent;
        let beforeElement;
        if (this._shouldFosterParentOnInsertion()) {
            ({ parent, beforeElement } = this._findFosterParentingLocation());
            if (beforeElement) {
                this.treeAdapter.insertTextBefore(parent, token.chars, beforeElement);
            }
            else {
                this.treeAdapter.insertText(parent, token.chars);
            }
        }
        else {
            parent = this.openElements.currentTmplContentOrNode;
            this.treeAdapter.insertText(parent, token.chars);
        }
        if (!token.location)
            return;
        const siblings = this.treeAdapter.getChildNodes(parent);
        const textNodeIdx = beforeElement ? siblings.lastIndexOf(beforeElement) : siblings.length;
        const textNode = siblings[textNodeIdx - 1];
        //NOTE: if we have a location assigned by another token, then just update the end position
        const tnLoc = this.treeAdapter.getNodeSourceCodeLocation(textNode);
        if (tnLoc) {
            const { endLine, endCol, endOffset } = token.location;
            this.treeAdapter.updateNodeSourceCodeLocation(textNode, { endLine, endCol, endOffset });
        }
        else if (this.options.sourceCodeLocationInfo) {
            this.treeAdapter.setNodeSourceCodeLocation(textNode, token.location);
        }
    }
    /** @protected */
    _adoptNodes(donor, recipient) {
        for (let child = this.treeAdapter.getFirstChild(donor); child; child = this.treeAdapter.getFirstChild(donor)) {
            this.treeAdapter.detachNode(child);
            this.treeAdapter.appendChild(recipient, child);
        }
    }
    /** @protected */
    _setEndLocation(element, closingToken) {
        if (this.treeAdapter.getNodeSourceCodeLocation(element) && closingToken.location) {
            const ctLoc = closingToken.location;
            const tn = this.treeAdapter.getTagName(element);
            const endLoc = 
            // NOTE: For cases like <p> <p> </p> - First 'p' closes without a closing
            // tag and for cases like <td> <p> </td> - 'p' closes without a closing tag.
            closingToken.type === TokenType.END_TAG && tn === closingToken.tagName
                ? {
                    endTag: { ...ctLoc },
                    endLine: ctLoc.endLine,
                    endCol: ctLoc.endCol,
                    endOffset: ctLoc.endOffset,
                }
                : {
                    endLine: ctLoc.startLine,
                    endCol: ctLoc.startCol,
                    endOffset: ctLoc.startOffset,
                };
            this.treeAdapter.updateNodeSourceCodeLocation(element, endLoc);
        }
    }
    //Token processing
    shouldProcessStartTagTokenInForeignContent(token) {
        // Check that neither current === document, or ns === NS.HTML
        if (!this.currentNotInHTML)
            return false;
        let current;
        let currentTagId;
        if (this.openElements.stackTop === 0 && this.fragmentContext) {
            current = this.fragmentContext;
            currentTagId = this.fragmentContextID;
        }
        else {
            ({ current, currentTagId } = this.openElements);
        }
        if (token.tagID === TAG_ID.SVG &&
            this.treeAdapter.getTagName(current) === TAG_NAMES.ANNOTATION_XML &&
            this.treeAdapter.getNamespaceURI(current) === NS.MATHML) {
            return false;
        }
        return (
        // Check that `current` is not an integration point for HTML or MathML elements.
        this.tokenizer.inForeignNode ||
            // If it _is_ an integration point, then we might have to check that it is not an HTML
            // integration point.
            ((token.tagID === TAG_ID.MGLYPH || token.tagID === TAG_ID.MALIGNMARK) &&
                !this._isIntegrationPoint(currentTagId, current, NS.HTML)));
    }
    /** @protected */
    _processToken(token) {
        switch (token.type) {
            case TokenType.CHARACTER: {
                this.onCharacter(token);
                break;
            }
            case TokenType.NULL_CHARACTER: {
                this.onNullCharacter(token);
                break;
            }
            case TokenType.COMMENT: {
                this.onComment(token);
                break;
            }
            case TokenType.DOCTYPE: {
                this.onDoctype(token);
                break;
            }
            case TokenType.START_TAG: {
                this._processStartTag(token);
                break;
            }
            case TokenType.END_TAG: {
                this.onEndTag(token);
                break;
            }
            case TokenType.EOF: {
                this.onEof(token);
                break;
            }
            case TokenType.WHITESPACE_CHARACTER: {
                this.onWhitespaceCharacter(token);
                break;
            }
        }
    }
    //Integration points
    /** @protected */
    _isIntegrationPoint(tid, element, foreignNS) {
        const ns = this.treeAdapter.getNamespaceURI(element);
        const attrs = this.treeAdapter.getAttrList(element);
        return isIntegrationPoint(tid, ns, attrs, foreignNS);
    }
    //Active formatting elements reconstruction
    /** @protected */
    _reconstructActiveFormattingElements() {
        const listLength = this.activeFormattingElements.entries.length;
        if (listLength) {
            const endIndex = this.activeFormattingElements.entries.findIndex((entry) => entry.type === EntryType.Marker || this.openElements.contains(entry.element));
            const unopenIdx = endIndex < 0 ? listLength - 1 : endIndex - 1;
            for (let i = unopenIdx; i >= 0; i--) {
                const entry = this.activeFormattingElements.entries[i];
                this._insertElement(entry.token, this.treeAdapter.getNamespaceURI(entry.element));
                entry.element = this.openElements.current;
            }
        }
    }
    //Close elements
    /** @protected */
    _closeTableCell() {
        this.openElements.generateImpliedEndTags();
        this.openElements.popUntilTableCellPopped();
        this.activeFormattingElements.clearToLastMarker();
        this.insertionMode = InsertionMode.IN_ROW;
    }
    /** @protected */
    _closePElement() {
        this.openElements.generateImpliedEndTagsWithExclusion(TAG_ID.P);
        this.openElements.popUntilTagNamePopped(TAG_ID.P);
    }
    //Insertion modes
    /** @protected */
    _resetInsertionMode() {
        for (let i = this.openElements.stackTop; i >= 0; i--) {
            //Insertion mode reset map
            switch (i === 0 && this.fragmentContext ? this.fragmentContextID : this.openElements.tagIDs[i]) {
                case TAG_ID.TR: {
                    this.insertionMode = InsertionMode.IN_ROW;
                    return;
                }
                case TAG_ID.TBODY:
                case TAG_ID.THEAD:
                case TAG_ID.TFOOT: {
                    this.insertionMode = InsertionMode.IN_TABLE_BODY;
                    return;
                }
                case TAG_ID.CAPTION: {
                    this.insertionMode = InsertionMode.IN_CAPTION;
                    return;
                }
                case TAG_ID.COLGROUP: {
                    this.insertionMode = InsertionMode.IN_COLUMN_GROUP;
                    return;
                }
                case TAG_ID.TABLE: {
                    this.insertionMode = InsertionMode.IN_TABLE;
                    return;
                }
                case TAG_ID.BODY: {
                    this.insertionMode = InsertionMode.IN_BODY;
                    return;
                }
                case TAG_ID.FRAMESET: {
                    this.insertionMode = InsertionMode.IN_FRAMESET;
                    return;
                }
                case TAG_ID.SELECT: {
                    this._resetInsertionModeForSelect(i);
                    return;
                }
                case TAG_ID.TEMPLATE: {
                    this.insertionMode = this.tmplInsertionModeStack[0];
                    return;
                }
                case TAG_ID.HTML: {
                    this.insertionMode = this.headElement ? InsertionMode.AFTER_HEAD : InsertionMode.BEFORE_HEAD;
                    return;
                }
                case TAG_ID.TD:
                case TAG_ID.TH: {
                    if (i > 0) {
                        this.insertionMode = InsertionMode.IN_CELL;
                        return;
                    }
                    break;
                }
                case TAG_ID.HEAD: {
                    if (i > 0) {
                        this.insertionMode = InsertionMode.IN_HEAD;
                        return;
                    }
                    break;
                }
            }
        }
        this.insertionMode = InsertionMode.IN_BODY;
    }
    /** @protected */
    _resetInsertionModeForSelect(selectIdx) {
        if (selectIdx > 0) {
            for (let i = selectIdx - 1; i > 0; i--) {
                const tn = this.openElements.tagIDs[i];
                if (tn === TAG_ID.TEMPLATE) {
                    break;
                }
                else if (tn === TAG_ID.TABLE) {
                    this.insertionMode = InsertionMode.IN_SELECT_IN_TABLE;
                    return;
                }
            }
        }
        this.insertionMode = InsertionMode.IN_SELECT;
    }
    //Foster parenting
    /** @protected */
    _isElementCausesFosterParenting(tn) {
        return TABLE_STRUCTURE_TAGS.has(tn);
    }
    /** @protected */
    _shouldFosterParentOnInsertion() {
        return this.fosterParentingEnabled && this._isElementCausesFosterParenting(this.openElements.currentTagId);
    }
    /** @protected */
    _findFosterParentingLocation() {
        for (let i = this.openElements.stackTop; i >= 0; i--) {
            const openElement = this.openElements.items[i];
            switch (this.openElements.tagIDs[i]) {
                case TAG_ID.TEMPLATE: {
                    if (this.treeAdapter.getNamespaceURI(openElement) === NS.HTML) {
                        return { parent: this.treeAdapter.getTemplateContent(openElement), beforeElement: null };
                    }
                    break;
                }
                case TAG_ID.TABLE: {
                    const parent = this.treeAdapter.getParentNode(openElement);
                    if (parent) {
                        return { parent, beforeElement: openElement };
                    }
                    return { parent: this.openElements.items[i - 1], beforeElement: null };
                }
                // Do nothing
            }
        }
        return { parent: this.openElements.items[0], beforeElement: null };
    }
    /** @protected */
    _fosterParentElement(element) {
        const location = this._findFosterParentingLocation();
        if (location.beforeElement) {
            this.treeAdapter.insertBefore(location.parent, element, location.beforeElement);
        }
        else {
            this.treeAdapter.appendChild(location.parent, element);
        }
    }
    //Special elements
    /** @protected */
    _isSpecialElement(element, id) {
        const ns = this.treeAdapter.getNamespaceURI(element);
        return SPECIAL_ELEMENTS[ns].has(id);
    }
    /** @internal */
    onCharacter(token) {
        this.skipNextNewLine = false;
        if (this.tokenizer.inForeignNode) {
            characterInForeignContent(this, token);
            return;
        }
        switch (this.insertionMode) {
            case InsertionMode.INITIAL: {
                tokenInInitialMode(this, token);
                break;
            }
            case InsertionMode.BEFORE_HTML: {
                tokenBeforeHtml(this, token);
                break;
            }
            case InsertionMode.BEFORE_HEAD: {
                tokenBeforeHead(this, token);
                break;
            }
            case InsertionMode.IN_HEAD: {
                tokenInHead(this, token);
                break;
            }
            case InsertionMode.IN_HEAD_NO_SCRIPT: {
                tokenInHeadNoScript(this, token);
                break;
            }
            case InsertionMode.AFTER_HEAD: {
                tokenAfterHead(this, token);
                break;
            }
            case InsertionMode.IN_BODY:
            case InsertionMode.IN_CAPTION:
            case InsertionMode.IN_CELL:
            case InsertionMode.IN_TEMPLATE: {
                characterInBody(this, token);
                break;
            }
            case InsertionMode.TEXT:
            case InsertionMode.IN_SELECT:
            case InsertionMode.IN_SELECT_IN_TABLE: {
                this._insertCharacters(token);
                break;
            }
            case InsertionMode.IN_TABLE:
            case InsertionMode.IN_TABLE_BODY:
            case InsertionMode.IN_ROW: {
                characterInTable(this, token);
                break;
            }
            case InsertionMode.IN_TABLE_TEXT: {
                characterInTableText(this, token);
                break;
            }
            case InsertionMode.IN_COLUMN_GROUP: {
                tokenInColumnGroup(this, token);
                break;
            }
            case InsertionMode.AFTER_BODY: {
                tokenAfterBody(this, token);
                break;
            }
            case InsertionMode.AFTER_AFTER_BODY: {
                tokenAfterAfterBody(this, token);
                break;
            }
            // Do nothing
        }
    }
    /** @internal */
    onNullCharacter(token) {
        this.skipNextNewLine = false;
        if (this.tokenizer.inForeignNode) {
            nullCharacterInForeignContent(this, token);
            return;
        }
        switch (this.insertionMode) {
            case InsertionMode.INITIAL: {
                tokenInInitialMode(this, token);
                break;
            }
            case InsertionMode.BEFORE_HTML: {
                tokenBeforeHtml(this, token);
                break;
            }
            case InsertionMode.BEFORE_HEAD: {
                tokenBeforeHead(this, token);
                break;
            }
            case InsertionMode.IN_HEAD: {
                tokenInHead(this, token);
                break;
            }
            case InsertionMode.IN_HEAD_NO_SCRIPT: {
                tokenInHeadNoScript(this, token);
                break;
            }
            case InsertionMode.AFTER_HEAD: {
                tokenAfterHead(this, token);
                break;
            }
            case InsertionMode.TEXT: {
                this._insertCharacters(token);
                break;
            }
            case InsertionMode.IN_TABLE:
            case InsertionMode.IN_TABLE_BODY:
            case InsertionMode.IN_ROW: {
                characterInTable(this, token);
                break;
            }
            case InsertionMode.IN_COLUMN_GROUP: {
                tokenInColumnGroup(this, token);
                break;
            }
            case InsertionMode.AFTER_BODY: {
                tokenAfterBody(this, token);
                break;
            }
            case InsertionMode.AFTER_AFTER_BODY: {
                tokenAfterAfterBody(this, token);
                break;
            }
            // Do nothing
        }
    }
    /** @internal */
    onComment(token) {
        this.skipNextNewLine = false;
        if (this.currentNotInHTML) {
            appendComment(this, token);
            return;
        }
        switch (this.insertionMode) {
            case InsertionMode.INITIAL:
            case InsertionMode.BEFORE_HTML:
            case InsertionMode.BEFORE_HEAD:
            case InsertionMode.IN_HEAD:
            case InsertionMode.IN_HEAD_NO_SCRIPT:
            case InsertionMode.AFTER_HEAD:
            case InsertionMode.IN_BODY:
            case InsertionMode.IN_TABLE:
            case InsertionMode.IN_CAPTION:
            case InsertionMode.IN_COLUMN_GROUP:
            case InsertionMode.IN_TABLE_BODY:
            case InsertionMode.IN_ROW:
            case InsertionMode.IN_CELL:
            case InsertionMode.IN_SELECT:
            case InsertionMode.IN_SELECT_IN_TABLE:
            case InsertionMode.IN_TEMPLATE:
            case InsertionMode.IN_FRAMESET:
            case InsertionMode.AFTER_FRAMESET: {
                appendComment(this, token);
                break;
            }
            case InsertionMode.IN_TABLE_TEXT: {
                tokenInTableText(this, token);
                break;
            }
            case InsertionMode.AFTER_BODY: {
                appendCommentToRootHtmlElement(this, token);
                break;
            }
            case InsertionMode.AFTER_AFTER_BODY:
            case InsertionMode.AFTER_AFTER_FRAMESET: {
                appendCommentToDocument(this, token);
                break;
            }
            // Do nothing
        }
    }
    /** @internal */
    onDoctype(token) {
        this.skipNextNewLine = false;
        switch (this.insertionMode) {
            case InsertionMode.INITIAL: {
                doctypeInInitialMode(this, token);
                break;
            }
            case InsertionMode.BEFORE_HEAD:
            case InsertionMode.IN_HEAD:
            case InsertionMode.IN_HEAD_NO_SCRIPT:
            case InsertionMode.AFTER_HEAD: {
                this._err(token, ERR.misplacedDoctype);
                break;
            }
            case InsertionMode.IN_TABLE_TEXT: {
                tokenInTableText(this, token);
                break;
            }
            // Do nothing
        }
    }
    /** @internal */
    onStartTag(token) {
        this.skipNextNewLine = false;
        this.currentToken = token;
        this._processStartTag(token);
        if (token.selfClosing && !token.ackSelfClosing) {
            this._err(token, ERR.nonVoidHtmlElementStartTagWithTrailingSolidus);
        }
    }
    /**
     * Processes a given start tag.
     *
     * `onStartTag` checks if a self-closing tag was recognized. When a token
     * is moved inbetween multiple insertion modes, this check for self-closing
     * could lead to false positives. To avoid this, `_processStartTag` is used
     * for nested calls.
     *
     * @param token The token to process.
     * @protected
     */
    _processStartTag(token) {
        if (this.shouldProcessStartTagTokenInForeignContent(token)) {
            startTagInForeignContent(this, token);
        }
        else {
            this._startTagOutsideForeignContent(token);
        }
    }
    /** @protected */
    _startTagOutsideForeignContent(token) {
        switch (this.insertionMode) {
            case InsertionMode.INITIAL: {
                tokenInInitialMode(this, token);
                break;
            }
            case InsertionMode.BEFORE_HTML: {
                startTagBeforeHtml(this, token);
                break;
            }
            case InsertionMode.BEFORE_HEAD: {
                startTagBeforeHead(this, token);
                break;
            }
            case InsertionMode.IN_HEAD: {
                startTagInHead(this, token);
                break;
            }
            case InsertionMode.IN_HEAD_NO_SCRIPT: {
                startTagInHeadNoScript(this, token);
                break;
            }
            case InsertionMode.AFTER_HEAD: {
                startTagAfterHead(this, token);
                break;
            }
            case InsertionMode.IN_BODY: {
                startTagInBody(this, token);
                break;
            }
            case InsertionMode.IN_TABLE: {
                startTagInTable(this, token);
                break;
            }
            case InsertionMode.IN_TABLE_TEXT: {
                tokenInTableText(this, token);
                break;
            }
            case InsertionMode.IN_CAPTION: {
                startTagInCaption(this, token);
                break;
            }
            case InsertionMode.IN_COLUMN_GROUP: {
                startTagInColumnGroup(this, token);
                break;
            }
            case InsertionMode.IN_TABLE_BODY: {
                startTagInTableBody(this, token);
                break;
            }
            case InsertionMode.IN_ROW: {
                startTagInRow(this, token);
                break;
            }
            case InsertionMode.IN_CELL: {
                startTagInCell(this, token);
                break;
            }
            case InsertionMode.IN_SELECT: {
                startTagInSelect(this, token);
                break;
            }
            case InsertionMode.IN_SELECT_IN_TABLE: {
                startTagInSelectInTable(this, token);
                break;
            }
            case InsertionMode.IN_TEMPLATE: {
                startTagInTemplate(this, token);
                break;
            }
            case InsertionMode.AFTER_BODY: {
                startTagAfterBody(this, token);
                break;
            }
            case InsertionMode.IN_FRAMESET: {
                startTagInFrameset(this, token);
                break;
            }
            case InsertionMode.AFTER_FRAMESET: {
                startTagAfterFrameset(this, token);
                break;
            }
            case InsertionMode.AFTER_AFTER_BODY: {
                startTagAfterAfterBody(this, token);
                break;
            }
            case InsertionMode.AFTER_AFTER_FRAMESET: {
                startTagAfterAfterFrameset(this, token);
                break;
            }
            // Do nothing
        }
    }
    /** @internal */
    onEndTag(token) {
        this.skipNextNewLine = false;
        this.currentToken = token;
        if (this.currentNotInHTML) {
            endTagInForeignContent(this, token);
        }
        else {
            this._endTagOutsideForeignContent(token);
        }
    }
    /** @protected */
    _endTagOutsideForeignContent(token) {
        switch (this.insertionMode) {
            case InsertionMode.INITIAL: {
                tokenInInitialMode(this, token);
                break;
            }
            case InsertionMode.BEFORE_HTML: {
                endTagBeforeHtml(this, token);
                break;
            }
            case InsertionMode.BEFORE_HEAD: {
                endTagBeforeHead(this, token);
                break;
            }
            case InsertionMode.IN_HEAD: {
                endTagInHead(this, token);
                break;
            }
            case InsertionMode.IN_HEAD_NO_SCRIPT: {
                endTagInHeadNoScript(this, token);
                break;
            }
            case InsertionMode.AFTER_HEAD: {
                endTagAfterHead(this, token);
                break;
            }
            case InsertionMode.IN_BODY: {
                endTagInBody(this, token);
                break;
            }
            case InsertionMode.TEXT: {
                endTagInText(this, token);
                break;
            }
            case InsertionMode.IN_TABLE: {
                endTagInTable(this, token);
                break;
            }
            case InsertionMode.IN_TABLE_TEXT: {
                tokenInTableText(this, token);
                break;
            }
            case InsertionMode.IN_CAPTION: {
                endTagInCaption(this, token);
                break;
            }
            case InsertionMode.IN_COLUMN_GROUP: {
                endTagInColumnGroup(this, token);
                break;
            }
            case InsertionMode.IN_TABLE_BODY: {
                endTagInTableBody(this, token);
                break;
            }
            case InsertionMode.IN_ROW: {
                endTagInRow(this, token);
                break;
            }
            case InsertionMode.IN_CELL: {
                endTagInCell(this, token);
                break;
            }
            case InsertionMode.IN_SELECT: {
                endTagInSelect(this, token);
                break;
            }
            case InsertionMode.IN_SELECT_IN_TABLE: {
                endTagInSelectInTable(this, token);
                break;
            }
            case InsertionMode.IN_TEMPLATE: {
                endTagInTemplate(this, token);
                break;
            }
            case InsertionMode.AFTER_BODY: {
                endTagAfterBody(this, token);
                break;
            }
            case InsertionMode.IN_FRAMESET: {
                endTagInFrameset(this, token);
                break;
            }
            case InsertionMode.AFTER_FRAMESET: {
                endTagAfterFrameset(this, token);
                break;
            }
            case InsertionMode.AFTER_AFTER_BODY: {
                tokenAfterAfterBody(this, token);
                break;
            }
            // Do nothing
        }
    }
    /** @internal */
    onEof(token) {
        switch (this.insertionMode) {
            case InsertionMode.INITIAL: {
                tokenInInitialMode(this, token);
                break;
            }
            case InsertionMode.BEFORE_HTML: {
                tokenBeforeHtml(this, token);
                break;
            }
            case InsertionMode.BEFORE_HEAD: {
                tokenBeforeHead(this, token);
                break;
            }
            case InsertionMode.IN_HEAD: {
                tokenInHead(this, token);
                break;
            }
            case InsertionMode.IN_HEAD_NO_SCRIPT: {
                tokenInHeadNoScript(this, token);
                break;
            }
            case InsertionMode.AFTER_HEAD: {
                tokenAfterHead(this, token);
                break;
            }
            case InsertionMode.IN_BODY:
            case InsertionMode.IN_TABLE:
            case InsertionMode.IN_CAPTION:
            case InsertionMode.IN_COLUMN_GROUP:
            case InsertionMode.IN_TABLE_BODY:
            case InsertionMode.IN_ROW:
            case InsertionMode.IN_CELL:
            case InsertionMode.IN_SELECT:
            case InsertionMode.IN_SELECT_IN_TABLE: {
                eofInBody(this, token);
                break;
            }
            case InsertionMode.TEXT: {
                eofInText(this, token);
                break;
            }
            case InsertionMode.IN_TABLE_TEXT: {
                tokenInTableText(this, token);
                break;
            }
            case InsertionMode.IN_TEMPLATE: {
                eofInTemplate(this, token);
                break;
            }
            case InsertionMode.AFTER_BODY:
            case InsertionMode.IN_FRAMESET:
            case InsertionMode.AFTER_FRAMESET:
            case InsertionMode.AFTER_AFTER_BODY:
            case InsertionMode.AFTER_AFTER_FRAMESET: {
                stopParsing(this, token);
                break;
            }
            // Do nothing
        }
    }
    /** @internal */
    onWhitespaceCharacter(token) {
        if (this.skipNextNewLine) {
            this.skipNextNewLine = false;
            if (token.chars.charCodeAt(0) === CODE_POINTS.LINE_FEED) {
                if (token.chars.length === 1) {
                    return;
                }
                token.chars = token.chars.substr(1);
            }
        }
        if (this.tokenizer.inForeignNode) {
            this._insertCharacters(token);
            return;
        }
        switch (this.insertionMode) {
            case InsertionMode.IN_HEAD:
            case InsertionMode.IN_HEAD_NO_SCRIPT:
            case InsertionMode.AFTER_HEAD:
            case InsertionMode.TEXT:
            case InsertionMode.IN_COLUMN_GROUP:
            case InsertionMode.IN_SELECT:
            case InsertionMode.IN_SELECT_IN_TABLE:
            case InsertionMode.IN_FRAMESET:
            case InsertionMode.AFTER_FRAMESET: {
                this._insertCharacters(token);
                break;
            }
            case InsertionMode.IN_BODY:
            case InsertionMode.IN_CAPTION:
            case InsertionMode.IN_CELL:
            case InsertionMode.IN_TEMPLATE:
            case InsertionMode.AFTER_BODY:
            case InsertionMode.AFTER_AFTER_BODY:
            case InsertionMode.AFTER_AFTER_FRAMESET: {
                whitespaceCharacterInBody(this, token);
                break;
            }
            case InsertionMode.IN_TABLE:
            case InsertionMode.IN_TABLE_BODY:
            case InsertionMode.IN_ROW: {
                characterInTable(this, token);
                break;
            }
            case InsertionMode.IN_TABLE_TEXT: {
                whitespaceCharacterInTableText(this, token);
                break;
            }
            // Do nothing
        }
    }
}
//Adoption agency algorithm
//(see: http://www.whatwg.org/specs/web-apps/current-work/multipage/tree-construction.html#adoptionAgency)
//------------------------------------------------------------------
//Steps 5-8 of the algorithm
function aaObtainFormattingElementEntry(p, token) {
    let formattingElementEntry = p.activeFormattingElements.getElementEntryInScopeWithTagName(token.tagName);
    if (formattingElementEntry) {
        if (!p.openElements.contains(formattingElementEntry.element)) {
            p.activeFormattingElements.removeEntry(formattingElementEntry);
            formattingElementEntry = null;
        }
        else if (!p.openElements.hasInScope(token.tagID)) {
            formattingElementEntry = null;
        }
    }
    else {
        genericEndTagInBody(p, token);
    }
    return formattingElementEntry;
}
//Steps 9 and 10 of the algorithm
function aaObtainFurthestBlock(p, formattingElementEntry) {
    let furthestBlock = null;
    let idx = p.openElements.stackTop;
    for (; idx >= 0; idx--) {
        const element = p.openElements.items[idx];
        if (element === formattingElementEntry.element) {
            break;
        }
        if (p._isSpecialElement(element, p.openElements.tagIDs[idx])) {
            furthestBlock = element;
        }
    }
    if (!furthestBlock) {
        p.openElements.shortenToLength(idx < 0 ? 0 : idx);
        p.activeFormattingElements.removeEntry(formattingElementEntry);
    }
    return furthestBlock;
}
//Step 13 of the algorithm
function aaInnerLoop(p, furthestBlock, formattingElement) {
    let lastElement = furthestBlock;
    let nextElement = p.openElements.getCommonAncestor(furthestBlock);
    for (let i = 0, element = nextElement; element !== formattingElement; i++, element = nextElement) {
        //NOTE: store the next element for the next loop iteration (it may be deleted from the stack by step 9.5)
        nextElement = p.openElements.getCommonAncestor(element);
        const elementEntry = p.activeFormattingElements.getElementEntry(element);
        const counterOverflow = elementEntry && i >= AA_INNER_LOOP_ITER;
        const shouldRemoveFromOpenElements = !elementEntry || counterOverflow;
        if (shouldRemoveFromOpenElements) {
            if (counterOverflow) {
                p.activeFormattingElements.removeEntry(elementEntry);
            }
            p.openElements.remove(element);
        }
        else {
            element = aaRecreateElementFromEntry(p, elementEntry);
            if (lastElement === furthestBlock) {
                p.activeFormattingElements.bookmark = elementEntry;
            }
            p.treeAdapter.detachNode(lastElement);
            p.treeAdapter.appendChild(element, lastElement);
            lastElement = element;
        }
    }
    return lastElement;
}
//Step 13.7 of the algorithm
function aaRecreateElementFromEntry(p, elementEntry) {
    const ns = p.treeAdapter.getNamespaceURI(elementEntry.element);
    const newElement = p.treeAdapter.createElement(elementEntry.token.tagName, ns, elementEntry.token.attrs);
    p.openElements.replace(elementEntry.element, newElement);
    elementEntry.element = newElement;
    return newElement;
}
//Step 14 of the algorithm
function aaInsertLastNodeInCommonAncestor(p, commonAncestor, lastElement) {
    const tn = p.treeAdapter.getTagName(commonAncestor);
    const tid = getTagID(tn);
    if (p._isElementCausesFosterParenting(tid)) {
        p._fosterParentElement(lastElement);
    }
    else {
        const ns = p.treeAdapter.getNamespaceURI(commonAncestor);
        if (tid === TAG_ID.TEMPLATE && ns === NS.HTML) {
            commonAncestor = p.treeAdapter.getTemplateContent(commonAncestor);
        }
        p.treeAdapter.appendChild(commonAncestor, lastElement);
    }
}
//Steps 15-19 of the algorithm
function aaReplaceFormattingElement(p, furthestBlock, formattingElementEntry) {
    const ns = p.treeAdapter.getNamespaceURI(formattingElementEntry.element);
    const { token } = formattingElementEntry;
    const newElement = p.treeAdapter.createElement(token.tagName, ns, token.attrs);
    p._adoptNodes(furthestBlock, newElement);
    p.treeAdapter.appendChild(furthestBlock, newElement);
    p.activeFormattingElements.insertElementAfterBookmark(newElement, token);
    p.activeFormattingElements.removeEntry(formattingElementEntry);
    p.openElements.remove(formattingElementEntry.element);
    p.openElements.insertAfter(furthestBlock, newElement, token.tagID);
}
//Algorithm entry point
function callAdoptionAgency(p, token) {
    for (let i = 0; i < AA_OUTER_LOOP_ITER; i++) {
        const formattingElementEntry = aaObtainFormattingElementEntry(p, token);
        if (!formattingElementEntry) {
            break;
        }
        const furthestBlock = aaObtainFurthestBlock(p, formattingElementEntry);
        if (!furthestBlock) {
            break;
        }
        p.activeFormattingElements.bookmark = formattingElementEntry;
        const lastElement = aaInnerLoop(p, furthestBlock, formattingElementEntry.element);
        const commonAncestor = p.openElements.getCommonAncestor(formattingElementEntry.element);
        p.treeAdapter.detachNode(lastElement);
        if (commonAncestor)
            aaInsertLastNodeInCommonAncestor(p, commonAncestor, lastElement);
        aaReplaceFormattingElement(p, furthestBlock, formattingElementEntry);
    }
}
//Generic token handlers
//------------------------------------------------------------------
function appendComment(p, token) {
    p._appendCommentNode(token, p.openElements.currentTmplContentOrNode);
}
function appendCommentToRootHtmlElement(p, token) {
    p._appendCommentNode(token, p.openElements.items[0]);
}
function appendCommentToDocument(p, token) {
    p._appendCommentNode(token, p.document);
}
function stopParsing(p, token) {
    p.stopped = true;
    // NOTE: Set end locations for elements that remain on the open element stack.
    if (token.location) {
        // NOTE: If we are not in a fragment, `html` and `body` will stay on the stack.
        // This is a problem, as we might overwrite their end position here.
        const target = p.fragmentContext ? 0 : 2;
        for (let i = p.openElements.stackTop; i >= target; i--) {
            p._setEndLocation(p.openElements.items[i], token);
        }
        // Handle `html` and `body`
        if (!p.fragmentContext && p.openElements.stackTop >= 0) {
            const htmlElement = p.openElements.items[0];
            const htmlLocation = p.treeAdapter.getNodeSourceCodeLocation(htmlElement);
            if (htmlLocation && !htmlLocation.endTag) {
                p._setEndLocation(htmlElement, token);
                if (p.openElements.stackTop >= 1) {
                    const bodyElement = p.openElements.items[1];
                    const bodyLocation = p.treeAdapter.getNodeSourceCodeLocation(bodyElement);
                    if (bodyLocation && !bodyLocation.endTag) {
                        p._setEndLocation(bodyElement, token);
                    }
                }
            }
        }
    }
}
// The "initial" insertion mode
//------------------------------------------------------------------
function doctypeInInitialMode(p, token) {
    p._setDocumentType(token);
    const mode = token.forceQuirks ? DOCUMENT_MODE.QUIRKS : getDocumentMode(token);
    if (!isConforming(token)) {
        p._err(token, ERR.nonConformingDoctype);
    }
    p.treeAdapter.setDocumentMode(p.document, mode);
    p.insertionMode = InsertionMode.BEFORE_HTML;
}
function tokenInInitialMode(p, token) {
    p._err(token, ERR.missingDoctype, true);
    p.treeAdapter.setDocumentMode(p.document, DOCUMENT_MODE.QUIRKS);
    p.insertionMode = InsertionMode.BEFORE_HTML;
    p._processToken(token);
}
// The "before html" insertion mode
//------------------------------------------------------------------
function startTagBeforeHtml(p, token) {
    if (token.tagID === TAG_ID.HTML) {
        p._insertElement(token, NS.HTML);
        p.insertionMode = InsertionMode.BEFORE_HEAD;
    }
    else {
        tokenBeforeHtml(p, token);
    }
}
function endTagBeforeHtml(p, token) {
    const tn = token.tagID;
    if (tn === TAG_ID.HTML || tn === TAG_ID.HEAD || tn === TAG_ID.BODY || tn === TAG_ID.BR) {
        tokenBeforeHtml(p, token);
    }
}
function tokenBeforeHtml(p, token) {
    p._insertFakeRootElement();
    p.insertionMode = InsertionMode.BEFORE_HEAD;
    p._processToken(token);
}
// The "before head" insertion mode
//------------------------------------------------------------------
function startTagBeforeHead(p, token) {
    switch (token.tagID) {
        case TAG_ID.HTML: {
            startTagInBody(p, token);
            break;
        }
        case TAG_ID.HEAD: {
            p._insertElement(token, NS.HTML);
            p.headElement = p.openElements.current;
            p.insertionMode = InsertionMode.IN_HEAD;
            break;
        }
        default: {
            tokenBeforeHead(p, token);
        }
    }
}
function endTagBeforeHead(p, token) {
    const tn = token.tagID;
    if (tn === TAG_ID.HEAD || tn === TAG_ID.BODY || tn === TAG_ID.HTML || tn === TAG_ID.BR) {
        tokenBeforeHead(p, token);
    }
    else {
        p._err(token, ERR.endTagWithoutMatchingOpenElement);
    }
}
function tokenBeforeHead(p, token) {
    p._insertFakeElement(TAG_NAMES.HEAD, TAG_ID.HEAD);
    p.headElement = p.openElements.current;
    p.insertionMode = InsertionMode.IN_HEAD;
    p._processToken(token);
}
// The "in head" insertion mode
//------------------------------------------------------------------
function startTagInHead(p, token) {
    switch (token.tagID) {
        case TAG_ID.HTML: {
            startTagInBody(p, token);
            break;
        }
        case TAG_ID.BASE:
        case TAG_ID.BASEFONT:
        case TAG_ID.BGSOUND:
        case TAG_ID.LINK:
        case TAG_ID.META: {
            p._appendElement(token, NS.HTML);
            token.ackSelfClosing = true;
            break;
        }
        case TAG_ID.TITLE: {
            p._switchToTextParsing(token, TokenizerMode.RCDATA);
            break;
        }
        case TAG_ID.NOSCRIPT: {
            if (p.options.scriptingEnabled) {
                p._switchToTextParsing(token, TokenizerMode.RAWTEXT);
            }
            else {
                p._insertElement(token, NS.HTML);
                p.insertionMode = InsertionMode.IN_HEAD_NO_SCRIPT;
            }
            break;
        }
        case TAG_ID.NOFRAMES:
        case TAG_ID.STYLE: {
            p._switchToTextParsing(token, TokenizerMode.RAWTEXT);
            break;
        }
        case TAG_ID.SCRIPT: {
            p._switchToTextParsing(token, TokenizerMode.SCRIPT_DATA);
            break;
        }
        case TAG_ID.TEMPLATE: {
            p._insertTemplate(token);
            p.activeFormattingElements.insertMarker();
            p.framesetOk = false;
            p.insertionMode = InsertionMode.IN_TEMPLATE;
            p.tmplInsertionModeStack.unshift(InsertionMode.IN_TEMPLATE);
            break;
        }
        case TAG_ID.HEAD: {
            p._err(token, ERR.misplacedStartTagForHeadElement);
            break;
        }
        default: {
            tokenInHead(p, token);
        }
    }
}
function endTagInHead(p, token) {
    switch (token.tagID) {
        case TAG_ID.HEAD: {
            p.openElements.pop();
            p.insertionMode = InsertionMode.AFTER_HEAD;
            break;
        }
        case TAG_ID.BODY:
        case TAG_ID.BR:
        case TAG_ID.HTML: {
            tokenInHead(p, token);
            break;
        }
        case TAG_ID.TEMPLATE: {
            templateEndTagInHead(p, token);
            break;
        }
        default: {
            p._err(token, ERR.endTagWithoutMatchingOpenElement);
        }
    }
}
function templateEndTagInHead(p, token) {
    if (p.openElements.tmplCount > 0) {
        p.openElements.generateImpliedEndTagsThoroughly();
        if (p.openElements.currentTagId !== TAG_ID.TEMPLATE) {
            p._err(token, ERR.closingOfElementWithOpenChildElements);
        }
        p.openElements.popUntilTagNamePopped(TAG_ID.TEMPLATE);
        p.activeFormattingElements.clearToLastMarker();
        p.tmplInsertionModeStack.shift();
        p._resetInsertionMode();
    }
    else {
        p._err(token, ERR.endTagWithoutMatchingOpenElement);
    }
}
function tokenInHead(p, token) {
    p.openElements.pop();
    p.insertionMode = InsertionMode.AFTER_HEAD;
    p._processToken(token);
}
// The "in head no script" insertion mode
//------------------------------------------------------------------
function startTagInHeadNoScript(p, token) {
    switch (token.tagID) {
        case TAG_ID.HTML: {
            startTagInBody(p, token);
            break;
        }
        case TAG_ID.BASEFONT:
        case TAG_ID.BGSOUND:
        case TAG_ID.HEAD:
        case TAG_ID.LINK:
        case TAG_ID.META:
        case TAG_ID.NOFRAMES:
        case TAG_ID.STYLE: {
            startTagInHead(p, token);
            break;
        }
        case TAG_ID.NOSCRIPT: {
            p._err(token, ERR.nestedNoscriptInHead);
            break;
        }
        default: {
            tokenInHeadNoScript(p, token);
        }
    }
}
function endTagInHeadNoScript(p, token) {
    switch (token.tagID) {
        case TAG_ID.NOSCRIPT: {
            p.openElements.pop();
            p.insertionMode = InsertionMode.IN_HEAD;
            break;
        }
        case TAG_ID.BR: {
            tokenInHeadNoScript(p, token);
            break;
        }
        default: {
            p._err(token, ERR.endTagWithoutMatchingOpenElement);
        }
    }
}
function tokenInHeadNoScript(p, token) {
    const errCode = token.type === TokenType.EOF ? ERR.openElementsLeftAfterEof : ERR.disallowedContentInNoscriptInHead;
    p._err(token, errCode);
    p.openElements.pop();
    p.insertionMode = InsertionMode.IN_HEAD;
    p._processToken(token);
}
// The "after head" insertion mode
//------------------------------------------------------------------
function startTagAfterHead(p, token) {
    switch (token.tagID) {
        case TAG_ID.HTML: {
            startTagInBody(p, token);
            break;
        }
        case TAG_ID.BODY: {
            p._insertElement(token, NS.HTML);
            p.framesetOk = false;
            p.insertionMode = InsertionMode.IN_BODY;
            break;
        }
        case TAG_ID.FRAMESET: {
            p._insertElement(token, NS.HTML);
            p.insertionMode = InsertionMode.IN_FRAMESET;
            break;
        }
        case TAG_ID.BASE:
        case TAG_ID.BASEFONT:
        case TAG_ID.BGSOUND:
        case TAG_ID.LINK:
        case TAG_ID.META:
        case TAG_ID.NOFRAMES:
        case TAG_ID.SCRIPT:
        case TAG_ID.STYLE:
        case TAG_ID.TEMPLATE:
        case TAG_ID.TITLE: {
            p._err(token, ERR.abandonedHeadElementChild);
            p.openElements.push(p.headElement, TAG_ID.HEAD);
            startTagInHead(p, token);
            p.openElements.remove(p.headElement);
            break;
        }
        case TAG_ID.HEAD: {
            p._err(token, ERR.misplacedStartTagForHeadElement);
            break;
        }
        default: {
            tokenAfterHead(p, token);
        }
    }
}
function endTagAfterHead(p, token) {
    switch (token.tagID) {
        case TAG_ID.BODY:
        case TAG_ID.HTML:
        case TAG_ID.BR: {
            tokenAfterHead(p, token);
            break;
        }
        case TAG_ID.TEMPLATE: {
            templateEndTagInHead(p, token);
            break;
        }
        default: {
            p._err(token, ERR.endTagWithoutMatchingOpenElement);
        }
    }
}
function tokenAfterHead(p, token) {
    p._insertFakeElement(TAG_NAMES.BODY, TAG_ID.BODY);
    p.insertionMode = InsertionMode.IN_BODY;
    modeInBody(p, token);
}
// The "in body" insertion mode
//------------------------------------------------------------------
function modeInBody(p, token) {
    switch (token.type) {
        case TokenType.CHARACTER: {
            characterInBody(p, token);
            break;
        }
        case TokenType.WHITESPACE_CHARACTER: {
            whitespaceCharacterInBody(p, token);
            break;
        }
        case TokenType.COMMENT: {
            appendComment(p, token);
            break;
        }
        case TokenType.START_TAG: {
            startTagInBody(p, token);
            break;
        }
        case TokenType.END_TAG: {
            endTagInBody(p, token);
            break;
        }
        case TokenType.EOF: {
            eofInBody(p, token);
            break;
        }
        // Do nothing
    }
}
function whitespaceCharacterInBody(p, token) {
    p._reconstructActiveFormattingElements();
    p._insertCharacters(token);
}
function characterInBody(p, token) {
    p._reconstructActiveFormattingElements();
    p._insertCharacters(token);
    p.framesetOk = false;
}
function htmlStartTagInBody(p, token) {
    if (p.openElements.tmplCount === 0) {
        p.treeAdapter.adoptAttributes(p.openElements.items[0], token.attrs);
    }
}
function bodyStartTagInBody(p, token) {
    const bodyElement = p.openElements.tryPeekProperlyNestedBodyElement();
    if (bodyElement && p.openElements.tmplCount === 0) {
        p.framesetOk = false;
        p.treeAdapter.adoptAttributes(bodyElement, token.attrs);
    }
}
function framesetStartTagInBody(p, token) {
    const bodyElement = p.openElements.tryPeekProperlyNestedBodyElement();
    if (p.framesetOk && bodyElement) {
        p.treeAdapter.detachNode(bodyElement);
        p.openElements.popAllUpToHtmlElement();
        p._insertElement(token, NS.HTML);
        p.insertionMode = InsertionMode.IN_FRAMESET;
    }
}
function addressStartTagInBody(p, token) {
    if (p.openElements.hasInButtonScope(TAG_ID.P)) {
        p._closePElement();
    }
    p._insertElement(token, NS.HTML);
}
function numberedHeaderStartTagInBody(p, token) {
    if (p.openElements.hasInButtonScope(TAG_ID.P)) {
        p._closePElement();
    }
    if (NUMBERED_HEADERS.has(p.openElements.currentTagId)) {
        p.openElements.pop();
    }
    p._insertElement(token, NS.HTML);
}
function preStartTagInBody(p, token) {
    if (p.openElements.hasInButtonScope(TAG_ID.P)) {
        p._closePElement();
    }
    p._insertElement(token, NS.HTML);
    //NOTE: If the next token is a U+000A LINE FEED (LF) character token, then ignore that token and move
    //on to the next one. (Newlines at the start of pre blocks are ignored as an authoring convenience.)
    p.skipNextNewLine = true;
    p.framesetOk = false;
}
function formStartTagInBody(p, token) {
    const inTemplate = p.openElements.tmplCount > 0;
    if (!p.formElement || inTemplate) {
        if (p.openElements.hasInButtonScope(TAG_ID.P)) {
            p._closePElement();
        }
        p._insertElement(token, NS.HTML);
        if (!inTemplate) {
            p.formElement = p.openElements.current;
        }
    }
}
function listItemStartTagInBody(p, token) {
    p.framesetOk = false;
    const tn = token.tagID;
    for (let i = p.openElements.stackTop; i >= 0; i--) {
        const elementId = p.openElements.tagIDs[i];
        if ((tn === TAG_ID.LI && elementId === TAG_ID.LI) ||
            ((tn === TAG_ID.DD || tn === TAG_ID.DT) && (elementId === TAG_ID.DD || elementId === TAG_ID.DT))) {
            p.openElements.generateImpliedEndTagsWithExclusion(elementId);
            p.openElements.popUntilTagNamePopped(elementId);
            break;
        }
        if (elementId !== TAG_ID.ADDRESS &&
            elementId !== TAG_ID.DIV &&
            elementId !== TAG_ID.P &&
            p._isSpecialElement(p.openElements.items[i], elementId)) {
            break;
        }
    }
    if (p.openElements.hasInButtonScope(TAG_ID.P)) {
        p._closePElement();
    }
    p._insertElement(token, NS.HTML);
}
function plaintextStartTagInBody(p, token) {
    if (p.openElements.hasInButtonScope(TAG_ID.P)) {
        p._closePElement();
    }
    p._insertElement(token, NS.HTML);
    p.tokenizer.state = TokenizerMode.PLAINTEXT;
}
function buttonStartTagInBody(p, token) {
    if (p.openElements.hasInScope(TAG_ID.BUTTON)) {
        p.openElements.generateImpliedEndTags();
        p.openElements.popUntilTagNamePopped(TAG_ID.BUTTON);
    }
    p._reconstructActiveFormattingElements();
    p._insertElement(token, NS.HTML);
    p.framesetOk = false;
}
function aStartTagInBody(p, token) {
    const activeElementEntry = p.activeFormattingElements.getElementEntryInScopeWithTagName(TAG_NAMES.A);
    if (activeElementEntry) {
        callAdoptionAgency(p, token);
        p.openElements.remove(activeElementEntry.element);
        p.activeFormattingElements.removeEntry(activeElementEntry);
    }
    p._reconstructActiveFormattingElements();
    p._insertElement(token, NS.HTML);
    p.activeFormattingElements.pushElement(p.openElements.current, token);
}
function bStartTagInBody(p, token) {
    p._reconstructActiveFormattingElements();
    p._insertElement(token, NS.HTML);
    p.activeFormattingElements.pushElement(p.openElements.current, token);
}
function nobrStartTagInBody(p, token) {
    p._reconstructActiveFormattingElements();
    if (p.openElements.hasInScope(TAG_ID.NOBR)) {
        callAdoptionAgency(p, token);
        p._reconstructActiveFormattingElements();
    }
    p._insertElement(token, NS.HTML);
    p.activeFormattingElements.pushElement(p.openElements.current, token);
}
function appletStartTagInBody(p, token) {
    p._reconstructActiveFormattingElements();
    p._insertElement(token, NS.HTML);
    p.activeFormattingElements.insertMarker();
    p.framesetOk = false;
}
function tableStartTagInBody(p, token) {
    if (p.treeAdapter.getDocumentMode(p.document) !== DOCUMENT_MODE.QUIRKS && p.openElements.hasInButtonScope(TAG_ID.P)) {
        p._closePElement();
    }
    p._insertElement(token, NS.HTML);
    p.framesetOk = false;
    p.insertionMode = InsertionMode.IN_TABLE;
}
function areaStartTagInBody(p, token) {
    p._reconstructActiveFormattingElements();
    p._appendElement(token, NS.HTML);
    p.framesetOk = false;
    token.ackSelfClosing = true;
}
function isHiddenInput(token) {
    const inputType = getTokenAttr(token, ATTRS.TYPE);
    return inputType != null && inputType.toLowerCase() === HIDDEN_INPUT_TYPE;
}
function inputStartTagInBody(p, token) {
    p._reconstructActiveFormattingElements();
    p._appendElement(token, NS.HTML);
    if (!isHiddenInput(token)) {
        p.framesetOk = false;
    }
    token.ackSelfClosing = true;
}
function paramStartTagInBody(p, token) {
    p._appendElement(token, NS.HTML);
    token.ackSelfClosing = true;
}
function hrStartTagInBody(p, token) {
    if (p.openElements.hasInButtonScope(TAG_ID.P)) {
        p._closePElement();
    }
    p._appendElement(token, NS.HTML);
    p.framesetOk = false;
    token.ackSelfClosing = true;
}
function imageStartTagInBody(p, token) {
    token.tagName = TAG_NAMES.IMG;
    token.tagID = TAG_ID.IMG;
    areaStartTagInBody(p, token);
}
function textareaStartTagInBody(p, token) {
    p._insertElement(token, NS.HTML);
    //NOTE: If the next token is a U+000A LINE FEED (LF) character token, then ignore that token and move
    //on to the next one. (Newlines at the start of textarea elements are ignored as an authoring convenience.)
    p.skipNextNewLine = true;
    p.tokenizer.state = TokenizerMode.RCDATA;
    p.originalInsertionMode = p.insertionMode;
    p.framesetOk = false;
    p.insertionMode = InsertionMode.TEXT;
}
function xmpStartTagInBody(p, token) {
    if (p.openElements.hasInButtonScope(TAG_ID.P)) {
        p._closePElement();
    }
    p._reconstructActiveFormattingElements();
    p.framesetOk = false;
    p._switchToTextParsing(token, TokenizerMode.RAWTEXT);
}
function iframeStartTagInBody(p, token) {
    p.framesetOk = false;
    p._switchToTextParsing(token, TokenizerMode.RAWTEXT);
}
//NOTE: here we assume that we always act as a user agent with enabled plugins/frames, so we parse
//<noembed>/<noframes> as rawtext.
function rawTextStartTagInBody(p, token) {
    p._switchToTextParsing(token, TokenizerMode.RAWTEXT);
}
function selectStartTagInBody(p, token) {
    p._reconstructActiveFormattingElements();
    p._insertElement(token, NS.HTML);
    p.framesetOk = false;
    p.insertionMode =
        p.insertionMode === InsertionMode.IN_TABLE ||
            p.insertionMode === InsertionMode.IN_CAPTION ||
            p.insertionMode === InsertionMode.IN_TABLE_BODY ||
            p.insertionMode === InsertionMode.IN_ROW ||
            p.insertionMode === InsertionMode.IN_CELL
            ? InsertionMode.IN_SELECT_IN_TABLE
            : InsertionMode.IN_SELECT;
}
function optgroupStartTagInBody(p, token) {
    if (p.openElements.currentTagId === TAG_ID.OPTION) {
        p.openElements.pop();
    }
    p._reconstructActiveFormattingElements();
    p._insertElement(token, NS.HTML);
}
function rbStartTagInBody(p, token) {
    if (p.openElements.hasInScope(TAG_ID.RUBY)) {
        p.openElements.generateImpliedEndTags();
    }
    p._insertElement(token, NS.HTML);
}
function rtStartTagInBody(p, token) {
    if (p.openElements.hasInScope(TAG_ID.RUBY)) {
        p.openElements.generateImpliedEndTagsWithExclusion(TAG_ID.RTC);
    }
    p._insertElement(token, NS.HTML);
}
function mathStartTagInBody(p, token) {
    p._reconstructActiveFormattingElements();
    adjustTokenMathMLAttrs(token);
    adjustTokenXMLAttrs(token);
    if (token.selfClosing) {
        p._appendElement(token, NS.MATHML);
    }
    else {
        p._insertElement(token, NS.MATHML);
    }
    token.ackSelfClosing = true;
}
function svgStartTagInBody(p, token) {
    p._reconstructActiveFormattingElements();
    adjustTokenSVGAttrs(token);
    adjustTokenXMLAttrs(token);
    if (token.selfClosing) {
        p._appendElement(token, NS.SVG);
    }
    else {
        p._insertElement(token, NS.SVG);
    }
    token.ackSelfClosing = true;
}
function genericStartTagInBody(p, token) {
    p._reconstructActiveFormattingElements();
    p._insertElement(token, NS.HTML);
}
function startTagInBody(p, token) {
    switch (token.tagID) {
        case TAG_ID.I:
        case TAG_ID.S:
        case TAG_ID.B:
        case TAG_ID.U:
        case TAG_ID.EM:
        case TAG_ID.TT:
        case TAG_ID.BIG:
        case TAG_ID.CODE:
        case TAG_ID.FONT:
        case TAG_ID.SMALL:
        case TAG_ID.STRIKE:
        case TAG_ID.STRONG: {
            bStartTagInBody(p, token);
            break;
        }
        case TAG_ID.A: {
            aStartTagInBody(p, token);
            break;
        }
        case TAG_ID.H1:
        case TAG_ID.H2:
        case TAG_ID.H3:
        case TAG_ID.H4:
        case TAG_ID.H5:
        case TAG_ID.H6: {
            numberedHeaderStartTagInBody(p, token);
            break;
        }
        case TAG_ID.P:
        case TAG_ID.DL:
        case TAG_ID.OL:
        case TAG_ID.UL:
        case TAG_ID.DIV:
        case TAG_ID.DIR:
        case TAG_ID.NAV:
        case TAG_ID.MAIN:
        case TAG_ID.MENU:
        case TAG_ID.ASIDE:
        case TAG_ID.CENTER:
        case TAG_ID.FIGURE:
        case TAG_ID.FOOTER:
        case TAG_ID.HEADER:
        case TAG_ID.HGROUP:
        case TAG_ID.DIALOG:
        case TAG_ID.DETAILS:
        case TAG_ID.ADDRESS:
        case TAG_ID.ARTICLE:
        case TAG_ID.SEARCH:
        case TAG_ID.SECTION:
        case TAG_ID.SUMMARY:
        case TAG_ID.FIELDSET:
        case TAG_ID.BLOCKQUOTE:
        case TAG_ID.FIGCAPTION: {
            addressStartTagInBody(p, token);
            break;
        }
        case TAG_ID.LI:
        case TAG_ID.DD:
        case TAG_ID.DT: {
            listItemStartTagInBody(p, token);
            break;
        }
        case TAG_ID.BR:
        case TAG_ID.IMG:
        case TAG_ID.WBR:
        case TAG_ID.AREA:
        case TAG_ID.EMBED:
        case TAG_ID.KEYGEN: {
            areaStartTagInBody(p, token);
            break;
        }
        case TAG_ID.HR: {
            hrStartTagInBody(p, token);
            break;
        }
        case TAG_ID.RB:
        case TAG_ID.RTC: {
            rbStartTagInBody(p, token);
            break;
        }
        case TAG_ID.RT:
        case TAG_ID.RP: {
            rtStartTagInBody(p, token);
            break;
        }
        case TAG_ID.PRE:
        case TAG_ID.LISTING: {
            preStartTagInBody(p, token);
            break;
        }
        case TAG_ID.XMP: {
            xmpStartTagInBody(p, token);
            break;
        }
        case TAG_ID.SVG: {
            svgStartTagInBody(p, token);
            break;
        }
        case TAG_ID.HTML: {
            htmlStartTagInBody(p, token);
            break;
        }
        case TAG_ID.BASE:
        case TAG_ID.LINK:
        case TAG_ID.META:
        case TAG_ID.STYLE:
        case TAG_ID.TITLE:
        case TAG_ID.SCRIPT:
        case TAG_ID.BGSOUND:
        case TAG_ID.BASEFONT:
        case TAG_ID.TEMPLATE: {
            startTagInHead(p, token);
            break;
        }
        case TAG_ID.BODY: {
            bodyStartTagInBody(p, token);
            break;
        }
        case TAG_ID.FORM: {
            formStartTagInBody(p, token);
            break;
        }
        case TAG_ID.NOBR: {
            nobrStartTagInBody(p, token);
            break;
        }
        case TAG_ID.MATH: {
            mathStartTagInBody(p, token);
            break;
        }
        case TAG_ID.TABLE: {
            tableStartTagInBody(p, token);
            break;
        }
        case TAG_ID.INPUT: {
            inputStartTagInBody(p, token);
            break;
        }
        case TAG_ID.PARAM:
        case TAG_ID.TRACK:
        case TAG_ID.SOURCE: {
            paramStartTagInBody(p, token);
            break;
        }
        case TAG_ID.IMAGE: {
            imageStartTagInBody(p, token);
            break;
        }
        case TAG_ID.BUTTON: {
            buttonStartTagInBody(p, token);
            break;
        }
        case TAG_ID.APPLET:
        case TAG_ID.OBJECT:
        case TAG_ID.MARQUEE: {
            appletStartTagInBody(p, token);
            break;
        }
        case TAG_ID.IFRAME: {
            iframeStartTagInBody(p, token);
            break;
        }
        case TAG_ID.SELECT: {
            selectStartTagInBody(p, token);
            break;
        }
        case TAG_ID.OPTION:
        case TAG_ID.OPTGROUP: {
            optgroupStartTagInBody(p, token);
            break;
        }
        case TAG_ID.NOEMBED:
        case TAG_ID.NOFRAMES: {
            rawTextStartTagInBody(p, token);
            break;
        }
        case TAG_ID.FRAMESET: {
            framesetStartTagInBody(p, token);
            break;
        }
        case TAG_ID.TEXTAREA: {
            textareaStartTagInBody(p, token);
            break;
        }
        case TAG_ID.NOSCRIPT: {
            if (p.options.scriptingEnabled) {
                rawTextStartTagInBody(p, token);
            }
            else {
                genericStartTagInBody(p, token);
            }
            break;
        }
        case TAG_ID.PLAINTEXT: {
            plaintextStartTagInBody(p, token);
            break;
        }
        case TAG_ID.COL:
        case TAG_ID.TH:
        case TAG_ID.TD:
        case TAG_ID.TR:
        case TAG_ID.HEAD:
        case TAG_ID.FRAME:
        case TAG_ID.TBODY:
        case TAG_ID.TFOOT:
        case TAG_ID.THEAD:
        case TAG_ID.CAPTION:
        case TAG_ID.COLGROUP: {
            // Ignore token
            break;
        }
        default: {
            genericStartTagInBody(p, token);
        }
    }
}
function bodyEndTagInBody(p, token) {
    if (p.openElements.hasInScope(TAG_ID.BODY)) {
        p.insertionMode = InsertionMode.AFTER_BODY;
        //NOTE: <body> is never popped from the stack, so we need to updated
        //the end location explicitly.
        if (p.options.sourceCodeLocationInfo) {
            const bodyElement = p.openElements.tryPeekProperlyNestedBodyElement();
            if (bodyElement) {
                p._setEndLocation(bodyElement, token);
            }
        }
    }
}
function htmlEndTagInBody(p, token) {
    if (p.openElements.hasInScope(TAG_ID.BODY)) {
        p.insertionMode = InsertionMode.AFTER_BODY;
        endTagAfterBody(p, token);
    }
}
function addressEndTagInBody(p, token) {
    const tn = token.tagID;
    if (p.openElements.hasInScope(tn)) {
        p.openElements.generateImpliedEndTags();
        p.openElements.popUntilTagNamePopped(tn);
    }
}
function formEndTagInBody(p) {
    const inTemplate = p.openElements.tmplCount > 0;
    const { formElement } = p;
    if (!inTemplate) {
        p.formElement = null;
    }
    if ((formElement || inTemplate) && p.openElements.hasInScope(TAG_ID.FORM)) {
        p.openElements.generateImpliedEndTags();
        if (inTemplate) {
            p.openElements.popUntilTagNamePopped(TAG_ID.FORM);
        }
        else if (formElement) {
            p.openElements.remove(formElement);
        }
    }
}
function pEndTagInBody(p) {
    if (!p.openElements.hasInButtonScope(TAG_ID.P)) {
        p._insertFakeElement(TAG_NAMES.P, TAG_ID.P);
    }
    p._closePElement();
}
function liEndTagInBody(p) {
    if (p.openElements.hasInListItemScope(TAG_ID.LI)) {
        p.openElements.generateImpliedEndTagsWithExclusion(TAG_ID.LI);
        p.openElements.popUntilTagNamePopped(TAG_ID.LI);
    }
}
function ddEndTagInBody(p, token) {
    const tn = token.tagID;
    if (p.openElements.hasInScope(tn)) {
        p.openElements.generateImpliedEndTagsWithExclusion(tn);
        p.openElements.popUntilTagNamePopped(tn);
    }
}
function numberedHeaderEndTagInBody(p) {
    if (p.openElements.hasNumberedHeaderInScope()) {
        p.openElements.generateImpliedEndTags();
        p.openElements.popUntilNumberedHeaderPopped();
    }
}
function appletEndTagInBody(p, token) {
    const tn = token.tagID;
    if (p.openElements.hasInScope(tn)) {
        p.openElements.generateImpliedEndTags();
        p.openElements.popUntilTagNamePopped(tn);
        p.activeFormattingElements.clearToLastMarker();
    }
}
function brEndTagInBody(p) {
    p._reconstructActiveFormattingElements();
    p._insertFakeElement(TAG_NAMES.BR, TAG_ID.BR);
    p.openElements.pop();
    p.framesetOk = false;
}
function genericEndTagInBody(p, token) {
    const tn = token.tagName;
    const tid = token.tagID;
    for (let i = p.openElements.stackTop; i > 0; i--) {
        const element = p.openElements.items[i];
        const elementId = p.openElements.tagIDs[i];
        // Compare the tag name here, as the tag might not be a known tag with an ID.
        if (tid === elementId && (tid !== TAG_ID.UNKNOWN || p.treeAdapter.getTagName(element) === tn)) {
            p.openElements.generateImpliedEndTagsWithExclusion(tid);
            if (p.openElements.stackTop >= i)
                p.openElements.shortenToLength(i);
            break;
        }
        if (p._isSpecialElement(element, elementId)) {
            break;
        }
    }
}
function endTagInBody(p, token) {
    switch (token.tagID) {
        case TAG_ID.A:
        case TAG_ID.B:
        case TAG_ID.I:
        case TAG_ID.S:
        case TAG_ID.U:
        case TAG_ID.EM:
        case TAG_ID.TT:
        case TAG_ID.BIG:
        case TAG_ID.CODE:
        case TAG_ID.FONT:
        case TAG_ID.NOBR:
        case TAG_ID.SMALL:
        case TAG_ID.STRIKE:
        case TAG_ID.STRONG: {
            callAdoptionAgency(p, token);
            break;
        }
        case TAG_ID.P: {
            pEndTagInBody(p);
            break;
        }
        case TAG_ID.DL:
        case TAG_ID.UL:
        case TAG_ID.OL:
        case TAG_ID.DIR:
        case TAG_ID.DIV:
        case TAG_ID.NAV:
        case TAG_ID.PRE:
        case TAG_ID.MAIN:
        case TAG_ID.MENU:
        case TAG_ID.ASIDE:
        case TAG_ID.BUTTON:
        case TAG_ID.CENTER:
        case TAG_ID.FIGURE:
        case TAG_ID.FOOTER:
        case TAG_ID.HEADER:
        case TAG_ID.HGROUP:
        case TAG_ID.DIALOG:
        case TAG_ID.ADDRESS:
        case TAG_ID.ARTICLE:
        case TAG_ID.DETAILS:
        case TAG_ID.SEARCH:
        case TAG_ID.SECTION:
        case TAG_ID.SUMMARY:
        case TAG_ID.LISTING:
        case TAG_ID.FIELDSET:
        case TAG_ID.BLOCKQUOTE:
        case TAG_ID.FIGCAPTION: {
            addressEndTagInBody(p, token);
            break;
        }
        case TAG_ID.LI: {
            liEndTagInBody(p);
            break;
        }
        case TAG_ID.DD:
        case TAG_ID.DT: {
            ddEndTagInBody(p, token);
            break;
        }
        case TAG_ID.H1:
        case TAG_ID.H2:
        case TAG_ID.H3:
        case TAG_ID.H4:
        case TAG_ID.H5:
        case TAG_ID.H6: {
            numberedHeaderEndTagInBody(p);
            break;
        }
        case TAG_ID.BR: {
            brEndTagInBody(p);
            break;
        }
        case TAG_ID.BODY: {
            bodyEndTagInBody(p, token);
            break;
        }
        case TAG_ID.HTML: {
            htmlEndTagInBody(p, token);
            break;
        }
        case TAG_ID.FORM: {
            formEndTagInBody(p);
            break;
        }
        case TAG_ID.APPLET:
        case TAG_ID.OBJECT:
        case TAG_ID.MARQUEE: {
            appletEndTagInBody(p, token);
            break;
        }
        case TAG_ID.TEMPLATE: {
            templateEndTagInHead(p, token);
            break;
        }
        default: {
            genericEndTagInBody(p, token);
        }
    }
}
function eofInBody(p, token) {
    if (p.tmplInsertionModeStack.length > 0) {
        eofInTemplate(p, token);
    }
    else {
        stopParsing(p, token);
    }
}
// The "text" insertion mode
//------------------------------------------------------------------
function endTagInText(p, token) {
    var _a;
    if (token.tagID === TAG_ID.SCRIPT) {
        (_a = p.scriptHandler) === null || _a === void 0 ? void 0 : _a.call(p, p.openElements.current);
    }
    p.openElements.pop();
    p.insertionMode = p.originalInsertionMode;
}
function eofInText(p, token) {
    p._err(token, ERR.eofInElementThatCanContainOnlyText);
    p.openElements.pop();
    p.insertionMode = p.originalInsertionMode;
    p.onEof(token);
}
// The "in table" insertion mode
//------------------------------------------------------------------
function characterInTable(p, token) {
    if (TABLE_STRUCTURE_TAGS.has(p.openElements.currentTagId)) {
        p.pendingCharacterTokens.length = 0;
        p.hasNonWhitespacePendingCharacterToken = false;
        p.originalInsertionMode = p.insertionMode;
        p.insertionMode = InsertionMode.IN_TABLE_TEXT;
        switch (token.type) {
            case TokenType.CHARACTER: {
                characterInTableText(p, token);
                break;
            }
            case TokenType.WHITESPACE_CHARACTER: {
                whitespaceCharacterInTableText(p, token);
                break;
            }
            // Ignore null
        }
    }
    else {
        tokenInTable(p, token);
    }
}
function captionStartTagInTable(p, token) {
    p.openElements.clearBackToTableContext();
    p.activeFormattingElements.insertMarker();
    p._insertElement(token, NS.HTML);
    p.insertionMode = InsertionMode.IN_CAPTION;
}
function colgroupStartTagInTable(p, token) {
    p.openElements.clearBackToTableContext();
    p._insertElement(token, NS.HTML);
    p.insertionMode = InsertionMode.IN_COLUMN_GROUP;
}
function colStartTagInTable(p, token) {
    p.openElements.clearBackToTableContext();
    p._insertFakeElement(TAG_NAMES.COLGROUP, TAG_ID.COLGROUP);
    p.insertionMode = InsertionMode.IN_COLUMN_GROUP;
    startTagInColumnGroup(p, token);
}
function tbodyStartTagInTable(p, token) {
    p.openElements.clearBackToTableContext();
    p._insertElement(token, NS.HTML);
    p.insertionMode = InsertionMode.IN_TABLE_BODY;
}
function tdStartTagInTable(p, token) {
    p.openElements.clearBackToTableContext();
    p._insertFakeElement(TAG_NAMES.TBODY, TAG_ID.TBODY);
    p.insertionMode = InsertionMode.IN_TABLE_BODY;
    startTagInTableBody(p, token);
}
function tableStartTagInTable(p, token) {
    if (p.openElements.hasInTableScope(TAG_ID.TABLE)) {
        p.openElements.popUntilTagNamePopped(TAG_ID.TABLE);
        p._resetInsertionMode();
        p._processStartTag(token);
    }
}
function inputStartTagInTable(p, token) {
    if (isHiddenInput(token)) {
        p._appendElement(token, NS.HTML);
    }
    else {
        tokenInTable(p, token);
    }
    token.ackSelfClosing = true;
}
function formStartTagInTable(p, token) {
    if (!p.formElement && p.openElements.tmplCount === 0) {
        p._insertElement(token, NS.HTML);
        p.formElement = p.openElements.current;
        p.openElements.pop();
    }
}
function startTagInTable(p, token) {
    switch (token.tagID) {
        case TAG_ID.TD:
        case TAG_ID.TH:
        case TAG_ID.TR: {
            tdStartTagInTable(p, token);
            break;
        }
        case TAG_ID.STYLE:
        case TAG_ID.SCRIPT:
        case TAG_ID.TEMPLATE: {
            startTagInHead(p, token);
            break;
        }
        case TAG_ID.COL: {
            colStartTagInTable(p, token);
            break;
        }
        case TAG_ID.FORM: {
            formStartTagInTable(p, token);
            break;
        }
        case TAG_ID.TABLE: {
            tableStartTagInTable(p, token);
            break;
        }
        case TAG_ID.TBODY:
        case TAG_ID.TFOOT:
        case TAG_ID.THEAD: {
            tbodyStartTagInTable(p, token);
            break;
        }
        case TAG_ID.INPUT: {
            inputStartTagInTable(p, token);
            break;
        }
        case TAG_ID.CAPTION: {
            captionStartTagInTable(p, token);
            break;
        }
        case TAG_ID.COLGROUP: {
            colgroupStartTagInTable(p, token);
            break;
        }
        default: {
            tokenInTable(p, token);
        }
    }
}
function endTagInTable(p, token) {
    switch (token.tagID) {
        case TAG_ID.TABLE: {
            if (p.openElements.hasInTableScope(TAG_ID.TABLE)) {
                p.openElements.popUntilTagNamePopped(TAG_ID.TABLE);
                p._resetInsertionMode();
            }
            break;
        }
        case TAG_ID.TEMPLATE: {
            templateEndTagInHead(p, token);
            break;
        }
        case TAG_ID.BODY:
        case TAG_ID.CAPTION:
        case TAG_ID.COL:
        case TAG_ID.COLGROUP:
        case TAG_ID.HTML:
        case TAG_ID.TBODY:
        case TAG_ID.TD:
        case TAG_ID.TFOOT:
        case TAG_ID.TH:
        case TAG_ID.THEAD:
        case TAG_ID.TR: {
            // Ignore token
            break;
        }
        default: {
            tokenInTable(p, token);
        }
    }
}
function tokenInTable(p, token) {
    const savedFosterParentingState = p.fosterParentingEnabled;
    p.fosterParentingEnabled = true;
    // Process token in `In Body` mode
    modeInBody(p, token);
    p.fosterParentingEnabled = savedFosterParentingState;
}
// The "in table text" insertion mode
//------------------------------------------------------------------
function whitespaceCharacterInTableText(p, token) {
    p.pendingCharacterTokens.push(token);
}
function characterInTableText(p, token) {
    p.pendingCharacterTokens.push(token);
    p.hasNonWhitespacePendingCharacterToken = true;
}
function tokenInTableText(p, token) {
    let i = 0;
    if (p.hasNonWhitespacePendingCharacterToken) {
        for (; i < p.pendingCharacterTokens.length; i++) {
            tokenInTable(p, p.pendingCharacterTokens[i]);
        }
    }
    else {
        for (; i < p.pendingCharacterTokens.length; i++) {
            p._insertCharacters(p.pendingCharacterTokens[i]);
        }
    }
    p.insertionMode = p.originalInsertionMode;
    p._processToken(token);
}
// The "in caption" insertion mode
//------------------------------------------------------------------
const TABLE_VOID_ELEMENTS = new Set([TAG_ID.CAPTION, TAG_ID.COL, TAG_ID.COLGROUP, TAG_ID.TBODY, TAG_ID.TD, TAG_ID.TFOOT, TAG_ID.TH, TAG_ID.THEAD, TAG_ID.TR]);
function startTagInCaption(p, token) {
    const tn = token.tagID;
    if (TABLE_VOID_ELEMENTS.has(tn)) {
        if (p.openElements.hasInTableScope(TAG_ID.CAPTION)) {
            p.openElements.generateImpliedEndTags();
            p.openElements.popUntilTagNamePopped(TAG_ID.CAPTION);
            p.activeFormattingElements.clearToLastMarker();
            p.insertionMode = InsertionMode.IN_TABLE;
            startTagInTable(p, token);
        }
    }
    else {
        startTagInBody(p, token);
    }
}
function endTagInCaption(p, token) {
    const tn = token.tagID;
    switch (tn) {
        case TAG_ID.CAPTION:
        case TAG_ID.TABLE: {
            if (p.openElements.hasInTableScope(TAG_ID.CAPTION)) {
                p.openElements.generateImpliedEndTags();
                p.openElements.popUntilTagNamePopped(TAG_ID.CAPTION);
                p.activeFormattingElements.clearToLastMarker();
                p.insertionMode = InsertionMode.IN_TABLE;
                if (tn === TAG_ID.TABLE) {
                    endTagInTable(p, token);
                }
            }
            break;
        }
        case TAG_ID.BODY:
        case TAG_ID.COL:
        case TAG_ID.COLGROUP:
        case TAG_ID.HTML:
        case TAG_ID.TBODY:
        case TAG_ID.TD:
        case TAG_ID.TFOOT:
        case TAG_ID.TH:
        case TAG_ID.THEAD:
        case TAG_ID.TR: {
            // Ignore token
            break;
        }
        default: {
            endTagInBody(p, token);
        }
    }
}
// The "in column group" insertion mode
//------------------------------------------------------------------
function startTagInColumnGroup(p, token) {
    switch (token.tagID) {
        case TAG_ID.HTML: {
            startTagInBody(p, token);
            break;
        }
        case TAG_ID.COL: {
            p._appendElement(token, NS.HTML);
            token.ackSelfClosing = true;
            break;
        }
        case TAG_ID.TEMPLATE: {
            startTagInHead(p, token);
            break;
        }
        default: {
            tokenInColumnGroup(p, token);
        }
    }
}
function endTagInColumnGroup(p, token) {
    switch (token.tagID) {
        case TAG_ID.COLGROUP: {
            if (p.openElements.currentTagId === TAG_ID.COLGROUP) {
                p.openElements.pop();
                p.insertionMode = InsertionMode.IN_TABLE;
            }
            break;
        }
        case TAG_ID.TEMPLATE: {
            templateEndTagInHead(p, token);
            break;
        }
        case TAG_ID.COL: {
            // Ignore token
            break;
        }
        default: {
            tokenInColumnGroup(p, token);
        }
    }
}
function tokenInColumnGroup(p, token) {
    if (p.openElements.currentTagId === TAG_ID.COLGROUP) {
        p.openElements.pop();
        p.insertionMode = InsertionMode.IN_TABLE;
        p._processToken(token);
    }
}
// The "in table body" insertion mode
//------------------------------------------------------------------
function startTagInTableBody(p, token) {
    switch (token.tagID) {
        case TAG_ID.TR: {
            p.openElements.clearBackToTableBodyContext();
            p._insertElement(token, NS.HTML);
            p.insertionMode = InsertionMode.IN_ROW;
            break;
        }
        case TAG_ID.TH:
        case TAG_ID.TD: {
            p.openElements.clearBackToTableBodyContext();
            p._insertFakeElement(TAG_NAMES.TR, TAG_ID.TR);
            p.insertionMode = InsertionMode.IN_ROW;
            startTagInRow(p, token);
            break;
        }
        case TAG_ID.CAPTION:
        case TAG_ID.COL:
        case TAG_ID.COLGROUP:
        case TAG_ID.TBODY:
        case TAG_ID.TFOOT:
        case TAG_ID.THEAD: {
            if (p.openElements.hasTableBodyContextInTableScope()) {
                p.openElements.clearBackToTableBodyContext();
                p.openElements.pop();
                p.insertionMode = InsertionMode.IN_TABLE;
                startTagInTable(p, token);
            }
            break;
        }
        default: {
            startTagInTable(p, token);
        }
    }
}
function endTagInTableBody(p, token) {
    const tn = token.tagID;
    switch (token.tagID) {
        case TAG_ID.TBODY:
        case TAG_ID.TFOOT:
        case TAG_ID.THEAD: {
            if (p.openElements.hasInTableScope(tn)) {
                p.openElements.clearBackToTableBodyContext();
                p.openElements.pop();
                p.insertionMode = InsertionMode.IN_TABLE;
            }
            break;
        }
        case TAG_ID.TABLE: {
            if (p.openElements.hasTableBodyContextInTableScope()) {
                p.openElements.clearBackToTableBodyContext();
                p.openElements.pop();
                p.insertionMode = InsertionMode.IN_TABLE;
                endTagInTable(p, token);
            }
            break;
        }
        case TAG_ID.BODY:
        case TAG_ID.CAPTION:
        case TAG_ID.COL:
        case TAG_ID.COLGROUP:
        case TAG_ID.HTML:
        case TAG_ID.TD:
        case TAG_ID.TH:
        case TAG_ID.TR: {
            // Ignore token
            break;
        }
        default: {
            endTagInTable(p, token);
        }
    }
}
// The "in row" insertion mode
//------------------------------------------------------------------
function startTagInRow(p, token) {
    switch (token.tagID) {
        case TAG_ID.TH:
        case TAG_ID.TD: {
            p.openElements.clearBackToTableRowContext();
            p._insertElement(token, NS.HTML);
            p.insertionMode = InsertionMode.IN_CELL;
            p.activeFormattingElements.insertMarker();
            break;
        }
        case TAG_ID.CAPTION:
        case TAG_ID.COL:
        case TAG_ID.COLGROUP:
        case TAG_ID.TBODY:
        case TAG_ID.TFOOT:
        case TAG_ID.THEAD:
        case TAG_ID.TR: {
            if (p.openElements.hasInTableScope(TAG_ID.TR)) {
                p.openElements.clearBackToTableRowContext();
                p.openElements.pop();
                p.insertionMode = InsertionMode.IN_TABLE_BODY;
                startTagInTableBody(p, token);
            }
            break;
        }
        default: {
            startTagInTable(p, token);
        }
    }
}
function endTagInRow(p, token) {
    switch (token.tagID) {
        case TAG_ID.TR: {
            if (p.openElements.hasInTableScope(TAG_ID.TR)) {
                p.openElements.clearBackToTableRowContext();
                p.openElements.pop();
                p.insertionMode = InsertionMode.IN_TABLE_BODY;
            }
            break;
        }
        case TAG_ID.TABLE: {
            if (p.openElements.hasInTableScope(TAG_ID.TR)) {
                p.openElements.clearBackToTableRowContext();
                p.openElements.pop();
                p.insertionMode = InsertionMode.IN_TABLE_BODY;
                endTagInTableBody(p, token);
            }
            break;
        }
        case TAG_ID.TBODY:
        case TAG_ID.TFOOT:
        case TAG_ID.THEAD: {
            if (p.openElements.hasInTableScope(token.tagID) || p.openElements.hasInTableScope(TAG_ID.TR)) {
                p.openElements.clearBackToTableRowContext();
                p.openElements.pop();
                p.insertionMode = InsertionMode.IN_TABLE_BODY;
                endTagInTableBody(p, token);
            }
            break;
        }
        case TAG_ID.BODY:
        case TAG_ID.CAPTION:
        case TAG_ID.COL:
        case TAG_ID.COLGROUP:
        case TAG_ID.HTML:
        case TAG_ID.TD:
        case TAG_ID.TH: {
            // Ignore end tag
            break;
        }
        default: {
            endTagInTable(p, token);
        }
    }
}
// The "in cell" insertion mode
//------------------------------------------------------------------
function startTagInCell(p, token) {
    const tn = token.tagID;
    if (TABLE_VOID_ELEMENTS.has(tn)) {
        if (p.openElements.hasInTableScope(TAG_ID.TD) || p.openElements.hasInTableScope(TAG_ID.TH)) {
            p._closeTableCell();
            startTagInRow(p, token);
        }
    }
    else {
        startTagInBody(p, token);
    }
}
function endTagInCell(p, token) {
    const tn = token.tagID;
    switch (tn) {
        case TAG_ID.TD:
        case TAG_ID.TH: {
            if (p.openElements.hasInTableScope(tn)) {
                p.openElements.generateImpliedEndTags();
                p.openElements.popUntilTagNamePopped(tn);
                p.activeFormattingElements.clearToLastMarker();
                p.insertionMode = InsertionMode.IN_ROW;
            }
            break;
        }
        case TAG_ID.TABLE:
        case TAG_ID.TBODY:
        case TAG_ID.TFOOT:
        case TAG_ID.THEAD:
        case TAG_ID.TR: {
            if (p.openElements.hasInTableScope(tn)) {
                p._closeTableCell();
                endTagInRow(p, token);
            }
            break;
        }
        case TAG_ID.BODY:
        case TAG_ID.CAPTION:
        case TAG_ID.COL:
        case TAG_ID.COLGROUP:
        case TAG_ID.HTML: {
            // Ignore token
            break;
        }
        default: {
            endTagInBody(p, token);
        }
    }
}
// The "in select" insertion mode
//------------------------------------------------------------------
function startTagInSelect(p, token) {
    switch (token.tagID) {
        case TAG_ID.HTML: {
            startTagInBody(p, token);
            break;
        }
        case TAG_ID.OPTION: {
            if (p.openElements.currentTagId === TAG_ID.OPTION) {
                p.openElements.pop();
            }
            p._insertElement(token, NS.HTML);
            break;
        }
        case TAG_ID.OPTGROUP: {
            if (p.openElements.currentTagId === TAG_ID.OPTION) {
                p.openElements.pop();
            }
            if (p.openElements.currentTagId === TAG_ID.OPTGROUP) {
                p.openElements.pop();
            }
            p._insertElement(token, NS.HTML);
            break;
        }
        case TAG_ID.HR: {
            if (p.openElements.currentTagId === TAG_ID.OPTION) {
                p.openElements.pop();
            }
            if (p.openElements.currentTagId === TAG_ID.OPTGROUP) {
                p.openElements.pop();
            }
            p._appendElement(token, NS.HTML);
            token.ackSelfClosing = true;
            break;
        }
        case TAG_ID.INPUT:
        case TAG_ID.KEYGEN:
        case TAG_ID.TEXTAREA:
        case TAG_ID.SELECT: {
            if (p.openElements.hasInSelectScope(TAG_ID.SELECT)) {
                p.openElements.popUntilTagNamePopped(TAG_ID.SELECT);
                p._resetInsertionMode();
                if (token.tagID !== TAG_ID.SELECT) {
                    p._processStartTag(token);
                }
            }
            break;
        }
        case TAG_ID.SCRIPT:
        case TAG_ID.TEMPLATE: {
            startTagInHead(p, token);
            break;
        }
        // Do nothing
    }
}
function endTagInSelect(p, token) {
    switch (token.tagID) {
        case TAG_ID.OPTGROUP: {
            if (p.openElements.stackTop > 0 &&
                p.openElements.currentTagId === TAG_ID.OPTION &&
                p.openElements.tagIDs[p.openElements.stackTop - 1] === TAG_ID.OPTGROUP) {
                p.openElements.pop();
            }
            if (p.openElements.currentTagId === TAG_ID.OPTGROUP) {
                p.openElements.pop();
            }
            break;
        }
        case TAG_ID.OPTION: {
            if (p.openElements.currentTagId === TAG_ID.OPTION) {
                p.openElements.pop();
            }
            break;
        }
        case TAG_ID.SELECT: {
            if (p.openElements.hasInSelectScope(TAG_ID.SELECT)) {
                p.openElements.popUntilTagNamePopped(TAG_ID.SELECT);
                p._resetInsertionMode();
            }
            break;
        }
        case TAG_ID.TEMPLATE: {
            templateEndTagInHead(p, token);
            break;
        }
        // Do nothing
    }
}
// The "in select in table" insertion mode
//------------------------------------------------------------------
function startTagInSelectInTable(p, token) {
    const tn = token.tagID;
    if (tn === TAG_ID.CAPTION ||
        tn === TAG_ID.TABLE ||
        tn === TAG_ID.TBODY ||
        tn === TAG_ID.TFOOT ||
        tn === TAG_ID.THEAD ||
        tn === TAG_ID.TR ||
        tn === TAG_ID.TD ||
        tn === TAG_ID.TH) {
        p.openElements.popUntilTagNamePopped(TAG_ID.SELECT);
        p._resetInsertionMode();
        p._processStartTag(token);
    }
    else {
        startTagInSelect(p, token);
    }
}
function endTagInSelectInTable(p, token) {
    const tn = token.tagID;
    if (tn === TAG_ID.CAPTION ||
        tn === TAG_ID.TABLE ||
        tn === TAG_ID.TBODY ||
        tn === TAG_ID.TFOOT ||
        tn === TAG_ID.THEAD ||
        tn === TAG_ID.TR ||
        tn === TAG_ID.TD ||
        tn === TAG_ID.TH) {
        if (p.openElements.hasInTableScope(tn)) {
            p.openElements.popUntilTagNamePopped(TAG_ID.SELECT);
            p._resetInsertionMode();
            p.onEndTag(token);
        }
    }
    else {
        endTagInSelect(p, token);
    }
}
// The "in template" insertion mode
//------------------------------------------------------------------
function startTagInTemplate(p, token) {
    switch (token.tagID) {
        // First, handle tags that can start without a mode change
        case TAG_ID.BASE:
        case TAG_ID.BASEFONT:
        case TAG_ID.BGSOUND:
        case TAG_ID.LINK:
        case TAG_ID.META:
        case TAG_ID.NOFRAMES:
        case TAG_ID.SCRIPT:
        case TAG_ID.STYLE:
        case TAG_ID.TEMPLATE:
        case TAG_ID.TITLE: {
            startTagInHead(p, token);
            break;
        }
        // Re-process the token in the appropriate mode
        case TAG_ID.CAPTION:
        case TAG_ID.COLGROUP:
        case TAG_ID.TBODY:
        case TAG_ID.TFOOT:
        case TAG_ID.THEAD: {
            p.tmplInsertionModeStack[0] = InsertionMode.IN_TABLE;
            p.insertionMode = InsertionMode.IN_TABLE;
            startTagInTable(p, token);
            break;
        }
        case TAG_ID.COL: {
            p.tmplInsertionModeStack[0] = InsertionMode.IN_COLUMN_GROUP;
            p.insertionMode = InsertionMode.IN_COLUMN_GROUP;
            startTagInColumnGroup(p, token);
            break;
        }
        case TAG_ID.TR: {
            p.tmplInsertionModeStack[0] = InsertionMode.IN_TABLE_BODY;
            p.insertionMode = InsertionMode.IN_TABLE_BODY;
            startTagInTableBody(p, token);
            break;
        }
        case TAG_ID.TD:
        case TAG_ID.TH: {
            p.tmplInsertionModeStack[0] = InsertionMode.IN_ROW;
            p.insertionMode = InsertionMode.IN_ROW;
            startTagInRow(p, token);
            break;
        }
        default: {
            p.tmplInsertionModeStack[0] = InsertionMode.IN_BODY;
            p.insertionMode = InsertionMode.IN_BODY;
            startTagInBody(p, token);
        }
    }
}
function endTagInTemplate(p, token) {
    if (token.tagID === TAG_ID.TEMPLATE) {
        templateEndTagInHead(p, token);
    }
}
function eofInTemplate(p, token) {
    if (p.openElements.tmplCount > 0) {
        p.openElements.popUntilTagNamePopped(TAG_ID.TEMPLATE);
        p.activeFormattingElements.clearToLastMarker();
        p.tmplInsertionModeStack.shift();
        p._resetInsertionMode();
        p.onEof(token);
    }
    else {
        stopParsing(p, token);
    }
}
// The "after body" insertion mode
//------------------------------------------------------------------
function startTagAfterBody(p, token) {
    if (token.tagID === TAG_ID.HTML) {
        startTagInBody(p, token);
    }
    else {
        tokenAfterBody(p, token);
    }
}
function endTagAfterBody(p, token) {
    var _a;
    if (token.tagID === TAG_ID.HTML) {
        if (!p.fragmentContext) {
            p.insertionMode = InsertionMode.AFTER_AFTER_BODY;
        }
        //NOTE: <html> is never popped from the stack, so we need to updated
        //the end location explicitly.
        if (p.options.sourceCodeLocationInfo && p.openElements.tagIDs[0] === TAG_ID.HTML) {
            p._setEndLocation(p.openElements.items[0], token);
            // Update the body element, if it doesn't have an end tag
            const bodyElement = p.openElements.items[1];
            if (bodyElement && !((_a = p.treeAdapter.getNodeSourceCodeLocation(bodyElement)) === null || _a === void 0 ? void 0 : _a.endTag)) {
                p._setEndLocation(bodyElement, token);
            }
        }
    }
    else {
        tokenAfterBody(p, token);
    }
}
function tokenAfterBody(p, token) {
    p.insertionMode = InsertionMode.IN_BODY;
    modeInBody(p, token);
}
// The "in frameset" insertion mode
//------------------------------------------------------------------
function startTagInFrameset(p, token) {
    switch (token.tagID) {
        case TAG_ID.HTML: {
            startTagInBody(p, token);
            break;
        }
        case TAG_ID.FRAMESET: {
            p._insertElement(token, NS.HTML);
            break;
        }
        case TAG_ID.FRAME: {
            p._appendElement(token, NS.HTML);
            token.ackSelfClosing = true;
            break;
        }
        case TAG_ID.NOFRAMES: {
            startTagInHead(p, token);
            break;
        }
        // Do nothing
    }
}
function endTagInFrameset(p, token) {
    if (token.tagID === TAG_ID.FRAMESET && !p.openElements.isRootHtmlElementCurrent()) {
        p.openElements.pop();
        if (!p.fragmentContext && p.openElements.currentTagId !== TAG_ID.FRAMESET) {
            p.insertionMode = InsertionMode.AFTER_FRAMESET;
        }
    }
}
// The "after frameset" insertion mode
//------------------------------------------------------------------
function startTagAfterFrameset(p, token) {
    switch (token.tagID) {
        case TAG_ID.HTML: {
            startTagInBody(p, token);
            break;
        }
        case TAG_ID.NOFRAMES: {
            startTagInHead(p, token);
            break;
        }
        // Do nothing
    }
}
function endTagAfterFrameset(p, token) {
    if (token.tagID === TAG_ID.HTML) {
        p.insertionMode = InsertionMode.AFTER_AFTER_FRAMESET;
    }
}
// The "after after body" insertion mode
//------------------------------------------------------------------
function startTagAfterAfterBody(p, token) {
    if (token.tagID === TAG_ID.HTML) {
        startTagInBody(p, token);
    }
    else {
        tokenAfterAfterBody(p, token);
    }
}
function tokenAfterAfterBody(p, token) {
    p.insertionMode = InsertionMode.IN_BODY;
    modeInBody(p, token);
}
// The "after after frameset" insertion mode
//------------------------------------------------------------------
function startTagAfterAfterFrameset(p, token) {
    switch (token.tagID) {
        case TAG_ID.HTML: {
            startTagInBody(p, token);
            break;
        }
        case TAG_ID.NOFRAMES: {
            startTagInHead(p, token);
            break;
        }
        // Do nothing
    }
}
// The rules for parsing tokens in foreign content
//------------------------------------------------------------------
function nullCharacterInForeignContent(p, token) {
    token.chars = REPLACEMENT_CHARACTER;
    p._insertCharacters(token);
}
function characterInForeignContent(p, token) {
    p._insertCharacters(token);
    p.framesetOk = false;
}
function popUntilHtmlOrIntegrationPoint(p) {
    while (p.treeAdapter.getNamespaceURI(p.openElements.current) !== NS.HTML &&
        !p._isIntegrationPoint(p.openElements.currentTagId, p.openElements.current)) {
        p.openElements.pop();
    }
}
function startTagInForeignContent(p, token) {
    if (causesExit(token)) {
        popUntilHtmlOrIntegrationPoint(p);
        p._startTagOutsideForeignContent(token);
    }
    else {
        const current = p._getAdjustedCurrentElement();
        const currentNs = p.treeAdapter.getNamespaceURI(current);
        if (currentNs === NS.MATHML) {
            adjustTokenMathMLAttrs(token);
        }
        else if (currentNs === NS.SVG) {
            adjustTokenSVGTagName(token);
            adjustTokenSVGAttrs(token);
        }
        adjustTokenXMLAttrs(token);
        if (token.selfClosing) {
            p._appendElement(token, currentNs);
        }
        else {
            p._insertElement(token, currentNs);
        }
        token.ackSelfClosing = true;
    }
}
function endTagInForeignContent(p, token) {
    if (token.tagID === TAG_ID.P || token.tagID === TAG_ID.BR) {
        popUntilHtmlOrIntegrationPoint(p);
        p._endTagOutsideForeignContent(token);
        return;
    }
    for (let i = p.openElements.stackTop; i > 0; i--) {
        const element = p.openElements.items[i];
        if (p.treeAdapter.getNamespaceURI(element) === NS.HTML) {
            p._endTagOutsideForeignContent(token);
            break;
        }
        const tagName = p.treeAdapter.getTagName(element);
        if (tagName.toLowerCase() === token.tagName) {
            //NOTE: update the token tag name for `_setEndLocation`.
            token.tagName = tagName;
            p.openElements.shortenToLength(i);
            break;
        }
    }
}

// Shorthands
/**
 * Parses an HTML string.
 *
 * @param html Input HTML string.
 * @param options Parsing options.
 * @returns Document
 *
 * @example
 *
 * ```js
 * const parse5 = require('parse5');
 *
 * const document = parse5.parse('<!DOCTYPE html><html><head></head><body>Hi there!</body></html>');
 *
 * console.log(document.childNodes[1].tagName); //> 'html'
 *```
 */
function parse(html, options) {
    return Parser.parse(html, options);
}

export { ERR as ErrorCodes, Parser, Tokenizer, TokenizerMode, defaultTreeAdapter, parse };
