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1"use strict";2// Many thanks for this post which made this migration much easier.3// https://mathiasbynens.be/notes/css-escapes4Object.defineProperty(exports, "__esModule", { value: true });5exports.default = unesc;6/**7 *8 * @param {string} str9 * @returns {[string, number]|undefined}10 */11function gobbleHex(str) {12    var lower = str.toLowerCase();13    var hex = "";14    var spaceTerminated = false;15    for (var i = 0; i < 6 && lower[i] !== undefined; i++) {16        var code = lower.charCodeAt(i);17        // check to see if we are dealing with a valid hex char [a-f|0-9]18        var valid = (code >= 97 && code <= 102) || (code >= 48 && code <= 57);19        // https://drafts.csswg.org/css-syntax/#consume-escaped-code-point20        spaceTerminated = code === 32;21        if (!valid) {22            break;23        }24        hex += lower[i];25    }26    if (hex.length === 0) {27        return undefined;28    }29    var codePoint = parseInt(hex, 16);30    var isSurrogate = codePoint >= 0xd800 && codePoint <= 0xdfff;31    // Add special case for32    // "If this number is zero, or is for a surrogate, or is greater than the maximum allowed code point"33    // https://drafts.csswg.org/css-syntax/#maximum-allowed-code-point34    if (isSurrogate || codePoint === 0x0000 || codePoint > 0x10ffff) {35        return ["\uFFFD", hex.length + (spaceTerminated ? 1 : 0)];36    }37    return [String.fromCodePoint(codePoint), hex.length + (spaceTerminated ? 1 : 0)];38}39var CONTAINS_ESCAPE = /\\/;40function unesc(str) {41    var needToProcess = CONTAINS_ESCAPE.test(str);42    if (!needToProcess) {43        return str;44    }45    var ret = "";46    for (var i = 0; i < str.length; i++) {47        if (str[i] === "\\") {48            var gobbled = gobbleHex(str.slice(i + 1, i + 7));49            if (gobbled !== undefined) {50                ret += gobbled[0];51                i += gobbled[1];52                continue;53            }54            // Retain a pair of \\ if double escaped `\\\\`55            // https://github.com/postcss/postcss-selector-parser/commit/268c9a7656fb53f543dc620aa5b73a30ec3ff20e56            if (str[i + 1] === "\\") {57                ret += "\\";58                i++;59                continue;60            }61            // if \\ is at the end of the string retain it62            // https://github.com/postcss/postcss-selector-parser/commit/01a6b346e3612ce1ab20219acc26abdc259ccefb63            if (str.length === i + 1) {64                ret += str[i];65            }66            continue;67        }68        ret += str[i];69    }70    return ret;71}72//# sourceMappingURL=unesc.js.map