lix-website/themes/lix/assets/bootstrap/node_modules/es-abstract/2021/Canonicalize.js
2024-04-26 22:49:34 -06:00

52 lines
1.2 KiB
JavaScript

'use strict';
var $TypeError = require('es-errors/type');
var callBound = require('call-bind/callBound');
var hasOwn = require('hasown');
var $charCodeAt = callBound('String.prototype.charCodeAt');
var $toUpperCase = callBound('String.prototype.toUpperCase');
var caseFolding = require('../helpers/caseFolding.json');
// https://262.ecma-international.org/6.0/#sec-runtime-semantics-canonicalize-ch
module.exports = function Canonicalize(ch, IgnoreCase, Unicode) {
if (typeof ch !== 'string') {
throw new $TypeError('Assertion failed: `ch` must be a character');
}
if (typeof IgnoreCase !== 'boolean' || typeof Unicode !== 'boolean') {
throw new $TypeError('Assertion failed: `IgnoreCase` and `Unicode` must be Booleans');
}
if (!IgnoreCase) {
return ch; // step 1
}
if (Unicode) { // step 2
if (hasOwn(caseFolding.C, ch)) {
return caseFolding.C[ch];
}
if (hasOwn(caseFolding.S, ch)) {
return caseFolding.S[ch];
}
return ch; // step 2.b
}
var u = $toUpperCase(ch); // step 2
if (u.length !== 1) {
return ch; // step 3
}
var cu = u; // step 4
if ($charCodeAt(ch, 0) >= 128 && $charCodeAt(cu, 0) < 128) {
return ch; // step 5
}
return cu;
};