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| // Adapted from https://github.com/mathiasbynens/he/blob/36afe179392226cf1b6ccdb16ebbb7a5a844d93a/src/he.js#L106-L134
|
| const decodeMap = new Map([
| [0, 65_533],
| // C1 Unicode control character reference replacements
| [128, 8364],
| [130, 8218],
| [131, 402],
| [132, 8222],
| [133, 8230],
| [134, 8224],
| [135, 8225],
| [136, 710],
| [137, 8240],
| [138, 352],
| [139, 8249],
| [140, 338],
| [142, 381],
| [145, 8216],
| [146, 8217],
| [147, 8220],
| [148, 8221],
| [149, 8226],
| [150, 8211],
| [151, 8212],
| [152, 732],
| [153, 8482],
| [154, 353],
| [155, 8250],
| [156, 339],
| [158, 382],
| [159, 376],
| ]);
|
| /**
| * Polyfill for `String.fromCodePoint`. It is used to create a string from a Unicode code point.
| */
| export const fromCodePoint: (...codePoints: number[]) => string =
| // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition, n/no-unsupported-features/es-builtins
| String.fromCodePoint ??
| ((codePoint: number): string => {
| let output = "";
|
| if (codePoint > 0xff_ff) {
| codePoint -= 0x1_00_00;
| output += String.fromCharCode(
| ((codePoint >>> 10) & 0x3_ff) | 0xd8_00,
| );
| codePoint = 0xdc_00 | (codePoint & 0x3_ff);
| }
|
| output += String.fromCharCode(codePoint);
| return output;
| });
|
| /**
| * Replace the given code point with a replacement character if it is a
| * surrogate or is outside the valid range. Otherwise return the code
| * point unchanged.
| */
| export function replaceCodePoint(codePoint: number): number {
| if (
| (codePoint >= 0xd8_00 && codePoint <= 0xdf_ff) ||
| codePoint > 0x10_ff_ff
| ) {
| return 0xff_fd;
| }
|
| return decodeMap.get(codePoint) ?? codePoint;
| }
|
| /**
| * Replace the code point if relevant, then convert it to a string.
| *
| * @deprecated Use `fromCodePoint(replaceCodePoint(codePoint))` instead.
| * @param codePoint The code point to decode.
| * @returns The decoded code point.
| */
| export function decodeCodePoint(codePoint: number): string {
| return fromCodePoint(replaceCodePoint(codePoint));
| }
|
|
