xtutils
Version:
Thuku's assorted general purpose typescript/javascript library.
80 lines • 3.13 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports._utf8Decode = exports._utf8Encode = exports._unescape = exports._escape = void 0;
const _string_1 = require("./_string");
/**
* The [escape()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/escape) function ~ _**deprecation-alt**_
* - Replaces all characters with escape sequences, with the exception of ASCII word characters `(A–Z, a–z, 0–9, _)` and `@\*_+-./`.
* - [EcmaScript spec](https://262.ecma-international.org/5.1/#sec-B.2.1)
*
* @param value - parse text
* @returns `string` escaped text
*/
const _escape = (value) => {
const text = (0, _string_1._str)(value);
if (!text.length)
return text;
let buffer = '';
const skip = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789@*_+-./,';
for (let i = 0; i < text.length; i++) {
let char = text[i];
if (skip.indexOf(char) < 0) {
const ord = text.charCodeAt(i);
char = ord < 256 ? '%' + ('00' + ord.toString(16)).toUpperCase().slice(-2) : '%u' + ('0000' + ord.toString(16)).toUpperCase().slice(-4);
}
buffer += char;
}
return buffer;
};
exports._escape = _escape;
/**
* The [unescape()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/unescape) function ~ _**deprecation-alt**_
* - Computes a new string in which hexadecimal escape sequences are replaced with the characters that they represent ~ _see `_escape()`_
* - [EcmaScript spec](https://262.ecma-international.org/5.1/#sec-B.2.2)
*
* @param value - parse text
* @returns `string` unescaped text
*/
const _unescape = (value) => {
const text = (0, _string_1._str)(value), len = text.length;
if (!len)
return text;
let buffer = '', k = 0;
while (k < len) {
let char = text[k];
if (char === '%') { //7
let chars = k <= (len - 6) && text[k + 1] === 'u' ? text.substring(k + 2, k + 6) : (k <= (len - 3) ? text.substring(k + 1, k + 3) : '');
if (!/^[0-9A-F]+$/i.test(chars))
chars = '';
if (chars.length === 4) {
char = String.fromCharCode(parseInt(chars, 16));
k += 5;
}
else if (chars.length === 2) {
char = String.fromCharCode(parseInt('00' + chars, 16));
k += 2;
}
}
buffer += char; //18
k += 1;
}
return buffer;
};
exports._unescape = _unescape;
/**
* UTF8 encode text ~ [REF](https://ecmanaut.blogspot.com/2006/07/encoding-decoding-utf8-in-javascript.html)
*
* @param value - parse text
* @returns `string` UTF8 encoded text
*/
const _utf8Encode = (value) => (0, exports._unescape)(encodeURIComponent((0, _string_1._str)(value)));
exports._utf8Encode = _utf8Encode;
/**
* UTF8 decode text
*
* @param value - parse text
* @returns `string` UTF8 decoded text
*/
const _utf8Decode = (value) => decodeURIComponent((0, exports._escape)(value));
exports._utf8Decode = _utf8Decode;
//# sourceMappingURL=_utf8.js.map