You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
76 lines
2.3 KiB
76 lines
2.3 KiB
"use strict";
|
|
|
|
exports.__esModule = true;
|
|
exports["default"] = unesc;
|
|
// Many thanks for this post which made this migration much easier.
|
|
// https://mathiasbynens.be/notes/css-escapes
|
|
|
|
/**
|
|
*
|
|
* @param {string} str
|
|
* @returns {[string, number]|undefined}
|
|
*/
|
|
function gobbleHex(str) {
|
|
var lower = str.toLowerCase();
|
|
var hex = '';
|
|
var spaceTerminated = false;
|
|
for (var i = 0; i < 6 && lower[i] !== undefined; i++) {
|
|
var code = lower.charCodeAt(i);
|
|
// check to see if we are dealing with a valid hex char [a-f|0-9]
|
|
var valid = code >= 97 && code <= 102 || code >= 48 && code <= 57;
|
|
// https://drafts.csswg.org/css-syntax/#consume-escaped-code-point
|
|
spaceTerminated = code === 32;
|
|
if (!valid) {
|
|
break;
|
|
}
|
|
hex += lower[i];
|
|
}
|
|
if (hex.length === 0) {
|
|
return undefined;
|
|
}
|
|
var codePoint = parseInt(hex, 16);
|
|
var isSurrogate = codePoint >= 0xD800 && codePoint <= 0xDFFF;
|
|
// Add special case for
|
|
// "If this number is zero, or is for a surrogate, or is greater than the maximum allowed code point"
|
|
// https://drafts.csswg.org/css-syntax/#maximum-allowed-code-point
|
|
if (isSurrogate || codePoint === 0x0000 || codePoint > 0x10FFFF) {
|
|
return ["\uFFFD", hex.length + (spaceTerminated ? 1 : 0)];
|
|
}
|
|
return [String.fromCodePoint(codePoint), hex.length + (spaceTerminated ? 1 : 0)];
|
|
}
|
|
var CONTAINS_ESCAPE = /\\/;
|
|
function unesc(str) {
|
|
var needToProcess = CONTAINS_ESCAPE.test(str);
|
|
if (!needToProcess) {
|
|
return str;
|
|
}
|
|
var ret = "";
|
|
for (var i = 0; i < str.length; i++) {
|
|
if (str[i] === "\\") {
|
|
var gobbled = gobbleHex(str.slice(i + 1, i + 7));
|
|
if (gobbled !== undefined) {
|
|
ret += gobbled[0];
|
|
i += gobbled[1];
|
|
continue;
|
|
}
|
|
|
|
// Retain a pair of \\ if double escaped `\\\\`
|
|
// https://github.com/postcss/postcss-selector-parser/commit/268c9a7656fb53f543dc620aa5b73a30ec3ff20e
|
|
if (str[i + 1] === "\\") {
|
|
ret += "\\";
|
|
i++;
|
|
continue;
|
|
}
|
|
|
|
// if \\ is at the end of the string retain it
|
|
// https://github.com/postcss/postcss-selector-parser/commit/01a6b346e3612ce1ab20219acc26abdc259ccefb
|
|
if (str.length === i + 1) {
|
|
ret += str[i];
|
|
}
|
|
continue;
|
|
}
|
|
ret += str[i];
|
|
}
|
|
return ret;
|
|
}
|
|
module.exports = exports.default; |