lix-website/themes/lix/assets/bootstrap/node_modules/es-abstract/2022/GetSubstitution.js
2024-04-26 22:49:34 -06:00

140 lines
5.6 KiB
JavaScript

'use strict';
var $TypeError = require('es-errors/type');
var regexTester = require('safe-regex-test');
var every = require('../helpers/every');
var inspect = require('object-inspect');
var Get = require('./Get');
var IsArray = require('./IsArray');
var min = require('./min');
var StringIndexOf = require('./StringIndexOf');
var StringToNumber = require('./StringToNumber');
var substring = require('./substring');
var ToString = require('./ToString');
var Type = require('./Type');
var isInteger = require('../helpers/isInteger');
var isStringOrUndefined = require('../helpers/isStringOrUndefined');
var isPrefixOf = require('../helpers/isPrefixOf');
var startsWithDollarDigit = regexTester(/^\$[0-9]/);
// http://www.ecma-international.org/ecma-262/13.0/#sec-getsubstitution
// eslint-disable-next-line max-statements, max-params, max-lines-per-function
module.exports = function GetSubstitution(matched, str, position, captures, namedCaptures, replacementTemplate) {
if (typeof matched !== 'string') {
throw new $TypeError('Assertion failed: `matched` must be a String');
}
if (typeof str !== 'string') {
throw new $TypeError('Assertion failed: `str` must be a String');
}
if (!isInteger(position) || position < 0) {
throw new $TypeError('Assertion failed: `position` must be a nonnegative integer, got ' + inspect(position));
}
if (!IsArray(captures) || !every(captures, isStringOrUndefined)) {
throw new $TypeError('Assertion failed: `captures` must be a possibly-empty List of Strings or `undefined`, got ' + inspect(captures));
}
if (typeof namedCaptures !== 'undefined' && Type(namedCaptures) !== 'Object') {
throw new $TypeError('Assertion failed: `namedCaptures` must be `undefined` or an Object');
}
if (typeof replacementTemplate !== 'string') {
throw new $TypeError('Assertion failed: `replacementTemplate` must be a String');
}
var stringLength = str.length; // step 1
if (position > stringLength) {
throw new $TypeError('Assertion failed: position > stringLength, got ' + inspect(position)); // step 2
}
var templateRemainder = replacementTemplate; // step 3
var result = ''; // step 4
while (templateRemainder !== '') { // step 5
// 5.a NOTE: The following steps isolate ref (a prefix of templateRemainder), determine refReplacement (its replacement), and then append that replacement to result.
var ref, refReplacement, found, capture;
if (isPrefixOf('$$', templateRemainder)) { // step 5.b
ref = '$$'; // step 5.b.i
refReplacement = '$'; // step 5.b.ii
} else if (isPrefixOf('$`', templateRemainder)) { // step 5.c
ref = '$`'; // step 5.c.i
refReplacement = substring(str, 0, position); // step 5.c.ii
} else if (isPrefixOf('$&', templateRemainder)) { // step 5.d
ref = '$&'; // step 5.d.i
refReplacement = matched; // step 5.d.ii
} else if (isPrefixOf('$\'', templateRemainder)) { // step 5.e
ref = '$\''; // step 5.e.i
var matchLength = matched.length; // step 5.e.ii
var tailPos = position + matchLength; // step 5.e.iii
refReplacement = substring(str, min(tailPos, stringLength)); // step 5.e.iv
// 5.e.v NOTE: tailPos can exceed stringLength only if this abstract operation was invoked by a call to the intrinsic @@replace method of %RegExp.prototype% on an object whose "exec" property is not the intrinsic %RegExp.prototype.exec%.
} else if (startsWithDollarDigit(templateRemainder)) { // step 5.f
found = false; // step 5.f.i
for (var d = 2; d > 0; d -= 1) { // step 5.f.ii
// If found is false and templateRemainder starts with "$" followed by d or more decimal digits, then
if (!found) { // step 5.f.ii.1
found = true; // step 5.f.ii.1.a
ref = substring(templateRemainder, 0, 1 + d); // step 5.f.ii.1.b
var digits = substring(templateRemainder, 1, 1 + d); // step 5.f.ii.1.c
var index = StringToNumber(digits); // step 5.f.ii.1.d
if (index < 0 || index > 99) {
throw new $TypeError('Assertion failed: `index` must be >= 0 and <= 99'); // step 5.f.ii.1.e
}
if (index === 0) { // step 5.f.ii.1.f
refReplacement = ref;
} else if (index <= captures.length) { // step 5.f.ii.1.g
capture = captures[index - 1]; // step 5.f.ii.1.g.i
if (typeof capture === 'undefined') { // step 5.f.ii.1.g.ii
refReplacement = ''; // step 5.f.ii.1.g.ii.i
} else { // step 5.f.ii.1.g.iii
refReplacement = capture; // step 5.f.ii.1.g.iii.i
}
} else { // step 5.f.ii.1.h
refReplacement = ref; // step 5.f.ii.1.h.i
}
}
}
} else if (isPrefixOf('$<', templateRemainder)) { // step 5.g
var gtPos = StringIndexOf(templateRemainder, '>', 0); // step 5.g.i
if (gtPos === -1 || typeof namedCaptures === 'undefined') { // step 5.g.ii
ref = '$<'; // step 5.g.ii.1
refReplacement = ref; // step 5.g.ii.2
} else { // step 5.g.iii
ref = substring(templateRemainder, 0, gtPos + 1); // step 5.g.iii.1
var groupName = substring(templateRemainder, 2, gtPos); // step 5.g.iii.2
if (Type(namedCaptures) !== 'Object') {
throw new $TypeError('Assertion failed: Type(namedCaptures) is not Object'); // step 5.g.iii.3
}
capture = Get(namedCaptures, groupName); // step 5.g.iii.4
if (typeof capture === 'undefined') { // step 5.g.iii.5
refReplacement = ''; // step 5.g.iii.5.a
} else { // step 5.g.iii.6
refReplacement = ToString(capture); // step 5.g.iii.6.a
}
}
} else { // step 5.h
ref = substring(templateRemainder, 0, 1); // step 5.h.i
refReplacement = ref; // step 5.h.ii
}
var refLength = ref.length; // step 5.i
templateRemainder = substring(templateRemainder, refLength); // step 5.j
result += refReplacement; // step 5.k
}
return result; // step 6
};