[6a3a178] | 1 | "use strict";
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| 2 |
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| 3 | exports.__esModule = true;
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| 4 | exports["default"] = unesc;
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| 5 |
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| 6 | // Many thanks for this post which made this migration much easier.
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| 7 | // https://mathiasbynens.be/notes/css-escapes
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| 8 |
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| 9 | /**
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| 10 | *
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| 11 | * @param {string} str
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| 12 | * @returns {[string, number]|undefined}
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| 13 | */
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| 14 | function gobbleHex(str) {
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| 15 | var lower = str.toLowerCase();
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| 16 | var hex = '';
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| 17 | var spaceTerminated = false;
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| 18 |
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| 19 | for (var i = 0; i < 6 && lower[i] !== undefined; i++) {
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| 20 | var code = lower.charCodeAt(i); // check to see if we are dealing with a valid hex char [a-f|0-9]
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| 21 |
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| 22 | var valid = code >= 97 && code <= 102 || code >= 48 && code <= 57; // https://drafts.csswg.org/css-syntax/#consume-escaped-code-point
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| 23 |
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| 24 | spaceTerminated = code === 32;
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| 25 |
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| 26 | if (!valid) {
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| 27 | break;
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| 28 | }
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| 29 |
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| 30 | hex += lower[i];
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| 31 | }
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| 32 |
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| 33 | if (hex.length === 0) {
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| 34 | return undefined;
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| 35 | }
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| 36 |
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| 37 | var codePoint = parseInt(hex, 16);
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| 38 | var isSurrogate = codePoint >= 0xD800 && codePoint <= 0xDFFF; // Add special case for
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| 39 | // "If this number is zero, or is for a surrogate, or is greater than the maximum allowed code point"
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| 40 | // https://drafts.csswg.org/css-syntax/#maximum-allowed-code-point
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| 41 |
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| 42 | if (isSurrogate || codePoint === 0x0000 || codePoint > 0x10FFFF) {
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| 43 | return ["\uFFFD", hex.length + (spaceTerminated ? 1 : 0)];
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| 44 | }
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| 45 |
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| 46 | return [String.fromCodePoint(codePoint), hex.length + (spaceTerminated ? 1 : 0)];
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| 47 | }
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| 48 |
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| 49 | var CONTAINS_ESCAPE = /\\/;
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| 50 |
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| 51 | function unesc(str) {
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| 52 | var needToProcess = CONTAINS_ESCAPE.test(str);
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| 53 |
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| 54 | if (!needToProcess) {
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| 55 | return str;
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| 56 | }
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| 57 |
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| 58 | var ret = "";
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| 59 |
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| 60 | for (var i = 0; i < str.length; i++) {
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| 61 | if (str[i] === "\\") {
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| 62 | var gobbled = gobbleHex(str.slice(i + 1, i + 7));
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| 63 |
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| 64 | if (gobbled !== undefined) {
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| 65 | ret += gobbled[0];
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| 66 | i += gobbled[1];
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| 67 | continue;
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| 68 | } // Retain a pair of \\ if double escaped `\\\\`
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| 69 | // https://github.com/postcss/postcss-selector-parser/commit/268c9a7656fb53f543dc620aa5b73a30ec3ff20e
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| 70 |
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| 71 |
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| 72 | if (str[i + 1] === "\\") {
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| 73 | ret += "\\";
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| 74 | i++;
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| 75 | continue;
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| 76 | } // if \\ is at the end of the string retain it
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| 77 | // https://github.com/postcss/postcss-selector-parser/commit/01a6b346e3612ce1ab20219acc26abdc259ccefb
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| 78 |
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| 79 |
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| 80 | if (str.length === i + 1) {
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| 81 | ret += str[i];
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| 82 | }
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| 83 |
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| 84 | continue;
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| 85 | }
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| 86 |
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| 87 | ret += str[i];
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| 88 | }
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| 89 |
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| 90 | return ret;
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| 91 | }
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| 92 |
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| 93 | module.exports = exports.default; |
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