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