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110 lines
3.1 KiB
110 lines
3.1 KiB
'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) Facebook, Inc. and its affiliates. All Rights Reserved. |
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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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const descriptors = Object.getOwnPropertyDescriptors(object); |
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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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); //@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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