"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.predefinedEntities = exports.endCharData = exports.attValueNormalizedWhitespace = exports.attValueCharSingleQuote = exports.attValueCharDoubleQuote = void 0;
exports.isNameChar = isNameChar;
exports.isNameStartChar = isNameStartChar;
exports.isReferenceChar = isReferenceChar;
exports.isWhitespace = isWhitespace;
exports.isXmlCodePoint = isXmlCodePoint;
/**
 * Regular expression that matches one or more `AttValue` characters in a
 * double-quoted attribute value.
 *
 * @see https://www.w3.org/TR/2008/REC-xml-20081126/#NT-AttValue
 */
exports.attValueCharDoubleQuote = /["&<]/;
/**
 * Regular expression that matches one or more `AttValue` characters in a
 * single-quoted attribute value.
 *
 * @see https://www.w3.org/TR/2008/REC-xml-20081126/#NT-AttValue
 */
exports.attValueCharSingleQuote = /['&<]/;
/**
 * Regular expression that matches a whitespace character that should be
 * normalized to a space character in an attribute value.
 *
 * @see https://www.w3.org/TR/2008/REC-xml-20081126/#AVNormalize
 */
exports.attValueNormalizedWhitespace = /\r\n|[\n\r\t]/g;
/**
 * Regular expression that matches one or more characters that signal the end of
 * XML `CharData` content.
 *
 * @see https://www.w3.org/TR/2008/REC-xml-20081126/#dt-chardata
 */
exports.endCharData = /<|&|]]>/;
/**
 * Mapping of predefined entity names to their replacement values.
 *
 * @see https://www.w3.org/TR/2008/REC-xml-20081126/#sec-predefined-ent
 */
exports.predefinedEntities = Object.freeze(Object.assign(Object.create(null), {
    amp: '&',
    apos: "'",
    gt: '>',
    lt: '<',
    quot: '"',
}));
/**
 * Returns `true` if _char_ is an XML `NameChar`, `false` if it isn't.
 *
 * @see https://www.w3.org/TR/2008/REC-xml-20081126/#NT-NameChar
 */
function isNameChar(char) {
    let cp = char.codePointAt(0);
    // Including the most common NameStartChars here improves performance
    // slightly.
    return (cp >= 0x61 && cp <= 0x7A) // a-z
        || (cp >= 0x41 && cp <= 0x5A) // A-Z
        || (cp >= 0x30 && cp <= 0x39) // 0-9
        || cp === 0x2D // -
        || cp === 0x2E // .
        || cp === 0xB7
        || (cp >= 0x300 && cp <= 0x36F)
        || cp === 0x203F
        || cp === 0x2040
        || isNameStartChar(char, cp);
}
/**
 * Returns `true` if _char_ is an XML `NameStartChar`, `false` if it isn't.
 *
 * @see https://www.w3.org/TR/2008/REC-xml-20081126/#NT-NameStartChar
 */
function isNameStartChar(char, cp = char.codePointAt(0)) {
    return (cp >= 0x61 && cp <= 0x7A) // a-z
        || (cp >= 0x41 && cp <= 0x5A) // A-Z
        || cp === 0x3A // :
        || cp === 0x5F // _
        || (cp >= 0xC0 && cp <= 0xD6)
        || (cp >= 0xD8 && cp <= 0xF6)
        || (cp >= 0xF8 && cp <= 0x2FF)
        || (cp >= 0x370 && cp <= 0x37D)
        || (cp >= 0x37F && cp <= 0x1FFF)
        || cp === 0x200C
        || cp === 0x200D
        || (cp >= 0x2070 && cp <= 0x218F)
        || (cp >= 0x2C00 && cp <= 0x2FEF)
        || (cp >= 0x3001 && cp <= 0xD7FF)
        || (cp >= 0xF900 && cp <= 0xFDCF)
        || (cp >= 0xFDF0 && cp <= 0xFFFD)
        || (cp >= 0x10000 && cp <= 0xEFFFF);
}
/**
 * Returns `true` if _char_ is a valid reference character (which may appear
 * between `&` and `;` in a reference), `false` otherwise.
 *
 * @see https://www.w3.org/TR/2008/REC-xml-20081126/#sec-references
 */
function isReferenceChar(char) {
    return char === '#' || isNameChar(char);
}
/**
 * Returns `true` if _char_ is an XML whitespace character, `false` otherwise.
 *
 * @see https://www.w3.org/TR/2008/REC-xml-20081126/#white
 */
function isWhitespace(char) {
    let cp = char.codePointAt(0);
    return cp === 0x20
        || cp === 0x9
        || cp === 0xA
        || cp === 0xD;
}
/**
 * Returns `true` if _codepoint_ is a valid XML `Char` code point, `false`
 * otherwise.
 *
 * @see https://www.w3.org/TR/2008/REC-xml-20081126/#NT-Char
 */
function isXmlCodePoint(cp) {
    return (cp >= 0x20 && cp <= 0xD7FF)
        || cp === 0xA
        || cp === 0x9
        || cp === 0xD
        || (cp >= 0xE000 && cp <= 0xFFFD)
        || (cp >= 0x10000 && cp <= 0x10FFFF);
}
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