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2 years ago
'use strict';
Object.defineProperty(exports, '__esModule', {
value: true
});
exports.default = deepCyclicCopyReplaceable;
var _prettyFormat = require('pretty-format');
/**
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
const builtInObject = [
Array,
Date,
Float32Array,
Float64Array,
Int16Array,
Int32Array,
Int8Array,
Map,
Set,
RegExp,
Uint16Array,
Uint32Array,
Uint8Array,
Uint8ClampedArray
];
if (typeof Buffer !== 'undefined') {
builtInObject.push(Buffer);
}
const isBuiltInObject = object => builtInObject.includes(object.constructor);
const isMap = value => value.constructor === Map;
function deepCyclicCopyReplaceable(value, cycles = new WeakMap()) {
if (typeof value !== 'object' || value === null) {
return value;
} else if (cycles.has(value)) {
return cycles.get(value);
} else if (Array.isArray(value)) {
return deepCyclicCopyArray(value, cycles);
} else if (isMap(value)) {
return deepCyclicCopyMap(value, cycles);
} else if (isBuiltInObject(value)) {
return value;
} else if (_prettyFormat.plugins.DOMElement.test(value)) {
return value.cloneNode(true);
} else {
return deepCyclicCopyObject(value, cycles);
}
}
function deepCyclicCopyObject(object, cycles) {
const newObject = Object.create(Object.getPrototypeOf(object));
const descriptors = Object.getOwnPropertyDescriptors(object);
cycles.set(object, newObject);
const newDescriptors = [
...Object.keys(descriptors),
...Object.getOwnPropertySymbols(descriptors)
].reduce(
//@ts-expect-error because typescript do not support symbol key in object
//https://github.com/microsoft/TypeScript/issues/1863
(newDescriptors, key) => {
const enumerable = descriptors[key].enumerable;
newDescriptors[key] = {
configurable: true,
enumerable,
value: deepCyclicCopyReplaceable(
// this accesses the value or getter, depending. We just care about the value anyways, and this allows us to not mess with accessors
// it has the side effect of invoking the getter here though, rather than copying it over
object[key],
cycles
),
writable: true
};
return newDescriptors;
},
{}
); //@ts-expect-error because typescript do not support symbol key in object
//https://github.com/microsoft/TypeScript/issues/1863
return Object.defineProperties(newObject, newDescriptors);
}
function deepCyclicCopyArray(array, cycles) {
const newArray = new (Object.getPrototypeOf(array).constructor)(array.length);
const length = array.length;
cycles.set(array, newArray);
for (let i = 0; i < length; i++) {
newArray[i] = deepCyclicCopyReplaceable(array[i], cycles);
}
return newArray;
}
function deepCyclicCopyMap(map, cycles) {
const newMap = new Map();
cycles.set(map, newMap);
map.forEach((value, key) => {
newMap.set(key, deepCyclicCopyReplaceable(value, cycles));
});
return newMap;
}