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Просмотр файла: index.cjs
'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
var toStringFunction = Function.prototype.toString;
var create = Object.create;
var toStringObject = Object.prototype.toString;
/**
* @classdesc Fallback cache for when WeakMap is not natively supported
*/
var LegacyCache = /** @class */ (function () {
function LegacyCache() {
this._keys = [];
this._values = [];
}
LegacyCache.prototype.has = function (key) {
return !!~this._keys.indexOf(key);
};
LegacyCache.prototype.get = function (key) {
return this._values[this._keys.indexOf(key)];
};
LegacyCache.prototype.set = function (key, value) {
this._keys.push(key);
this._values.push(value);
};
return LegacyCache;
}());
function createCacheLegacy() {
return new LegacyCache();
}
function createCacheModern() {
return new WeakMap();
}
/**
* Get a new cache object to prevent circular references.
*/
var createCache = typeof WeakMap !== 'undefined' ? createCacheModern : createCacheLegacy;
/**
* Get an empty version of the object with the same prototype it has.
*/
function getCleanClone(prototype) {
if (!prototype) {
return create(null);
}
var Constructor = prototype.constructor;
if (Constructor === Object) {
return prototype === Object.prototype ? {} : create(prototype);
}
if (Constructor &&
~toStringFunction.call(Constructor).indexOf('[native code]')) {
try {
return new Constructor();
}
catch (_a) { }
}
return create(prototype);
}
function getRegExpFlagsLegacy(regExp) {
var flags = '';
if (regExp.global) {
flags += 'g';
}
if (regExp.ignoreCase) {
flags += 'i';
}
if (regExp.multiline) {
flags += 'm';
}
if (regExp.unicode) {
flags += 'u';
}
if (regExp.sticky) {
flags += 'y';
}
return flags;
}
function getRegExpFlagsModern(regExp) {
return regExp.flags;
}
/**
* Get the flags to apply to the copied regexp.
*/
var getRegExpFlags = /test/g.flags === 'g' ? getRegExpFlagsModern : getRegExpFlagsLegacy;
function getTagLegacy(value) {
var type = toStringObject.call(value);
return type.substring(8, type.length - 1);
}
function getTagModern(value) {
return value[Symbol.toStringTag] || getTagLegacy(value);
}
/**
* Get the tag of the value passed, so that the correct copier can be used.
*/
var getTag = typeof Symbol !== 'undefined' ? getTagModern : getTagLegacy;
var defineProperty = Object.defineProperty, getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor, getOwnPropertyNames = Object.getOwnPropertyNames, getOwnPropertySymbols = Object.getOwnPropertySymbols;
var _a = Object.prototype, hasOwnProperty = _a.hasOwnProperty, propertyIsEnumerable = _a.propertyIsEnumerable;
var SUPPORTS_SYMBOL = typeof getOwnPropertySymbols === 'function';
function getStrictPropertiesModern(object) {
return getOwnPropertyNames(object).concat(getOwnPropertySymbols(object));
}
/**
* Get the properites used when copying objects strictly. This includes both keys and symbols.
*/
var getStrictProperties = SUPPORTS_SYMBOL
? getStrictPropertiesModern
: getOwnPropertyNames;
/**
* Striclty copy all properties contained on the object.
*/
function copyOwnPropertiesStrict(value, clone, state) {
var properties = getStrictProperties(value);
for (var index = 0, length_1 = properties.length, property = void 0, descriptor = void 0; index < length_1; ++index) {
property = properties[index];
if (property === 'callee' || property === 'caller') {
continue;
}
descriptor = getOwnPropertyDescriptor(value, property);
if (!descriptor) {
// In extra edge cases where the property descriptor cannot be retrived, fall back to
// the loose assignment.
clone[property] = state.copier(value[property], state);
continue;
}
// Only clone the value if actually a value, not a getter / setter.
if (!descriptor.get && !descriptor.set) {
descriptor.value = state.copier(descriptor.value, state);
}
try {
defineProperty(clone, property, descriptor);
}
catch (error) {
// Tee above can fail on node in edge cases, so fall back to the loose assignment.
clone[property] = descriptor.value;
}
}
return clone;
}
/**
* Deeply copy the indexed values in the array.
*/
function copyArrayLoose(array, state) {
var clone = new state.Constructor();
// set in the cache immediately to be able to reuse the object recursively
state.cache.set(array, clone);
for (var index = 0, length_2 = array.length; index < length_2; ++index) {
clone[index] = state.copier(array[index], state);
}
return clone;
}
/**
* Deeply copy the indexed values in the array, as well as any custom properties.
*/
function copyArrayStrict(array, state) {
var clone = new state.Constructor();
// set in the cache immediately to be able to reuse the object recursively
state.cache.set(array, clone);
return copyOwnPropertiesStrict(array, clone, state);
}
/**
* Copy the contents of the ArrayBuffer.
*/
function copyArrayBuffer(arrayBuffer, _state) {
return arrayBuffer.slice(0);
}
/**
* Create a new Blob with the contents of the original.
*/
function copyBlob(blob, _state) {
return blob.slice(0, blob.size, blob.type);
}
/**
* Create a new DataView with the contents of the original.
*/
function copyDataView(dataView, state) {
return new state.Constructor(copyArrayBuffer(dataView.buffer));
}
/**
* Create a new Date based on the time of the original.
*/
function copyDate(date, state) {
return new state.Constructor(date.getTime());
}
/**
* Deeply copy the keys and values of the original.
*/
function copyMapLoose(map, state) {
var clone = new state.Constructor();
// set in the cache immediately to be able to reuse the object recursively
state.cache.set(map, clone);
map.forEach(function (value, key) {
clone.set(key, state.copier(value, state));
});
return clone;
}
/**
* Deeply copy the keys and values of the original, as well as any custom properties.
*/
function copyMapStrict(map, state) {
return copyOwnPropertiesStrict(map, copyMapLoose(map, state), state);
}
function copyObjectLooseLegacy(object, state) {
var clone = getCleanClone(state.prototype);
// set in the cache immediately to be able to reuse the object recursively
state.cache.set(object, clone);
for (var key in object) {
if (hasOwnProperty.call(object, key)) {
clone[key] = state.copier(object[key], state);
}
}
return clone;
}
function copyObjectLooseModern(object, state) {
var clone = getCleanClone(state.prototype);
// set in the cache immediately to be able to reuse the object recursively
state.cache.set(object, clone);
for (var key in object) {
if (hasOwnProperty.call(object, key)) {
clone[key] = state.copier(object[key], state);
}
}
var symbols = getOwnPropertySymbols(object);
for (var index = 0, length_3 = symbols.length, symbol = void 0; index < length_3; ++index) {
symbol = symbols[index];
if (propertyIsEnumerable.call(object, symbol)) {
clone[symbol] = state.copier(object[symbol], state);
}
}
return clone;
}
/**
* Deeply copy the properties (keys and symbols) and values of the original.
*/
var copyObjectLoose = SUPPORTS_SYMBOL
? copyObjectLooseModern
: copyObjectLooseLegacy;
/**
* Deeply copy the properties (keys and symbols) and values of the original, as well
* as any hidden or non-enumerable properties.
*/
function copyObjectStrict(object, state) {
var clone = getCleanClone(state.prototype);
// set in the cache immediately to be able to reuse the object recursively
state.cache.set(object, clone);
return copyOwnPropertiesStrict(object, clone, state);
}
/**
* Create a new primitive wrapper from the value of the original.
*/
function copyPrimitiveWrapper(primitiveObject, state) {
return new state.Constructor(primitiveObject.valueOf());
}
/**
* Create a new RegExp based on the value and flags of the original.
*/
function copyRegExp(regExp, state) {
var clone = new state.Constructor(regExp.source, getRegExpFlags(regExp));
clone.lastIndex = regExp.lastIndex;
return clone;
}
/**
* Return the original value (an identity function).
*
* @note
* THis is used for objects that cannot be copied, such as WeakMap.
*/
function copySelf(value, _state) {
return value;
}
/**
* Deeply copy the values of the original.
*/
function copySetLoose(set, state) {
var clone = new state.Constructor();
// set in the cache immediately to be able to reuse the object recursively
state.cache.set(set, clone);
set.forEach(function (value) {
clone.add(state.copier(value, state));
});
return clone;
}
/**
* Deeply copy the values of the original, as well as any custom properties.
*/
function copySetStrict(set, state) {
return copyOwnPropertiesStrict(set, copySetLoose(set, state), state);
}
var isArray = Array.isArray;
var assign = Object.assign;
var getPrototypeOf = Object.getPrototypeOf || (function (obj) { return obj.__proto__; });
var DEFAULT_LOOSE_OPTIONS = {
array: copyArrayLoose,
arrayBuffer: copyArrayBuffer,
blob: copyBlob,
dataView: copyDataView,
date: copyDate,
error: copySelf,
map: copyMapLoose,
object: copyObjectLoose,
regExp: copyRegExp,
set: copySetLoose,
};
var DEFAULT_STRICT_OPTIONS = assign({}, DEFAULT_LOOSE_OPTIONS, {
array: copyArrayStrict,
map: copyMapStrict,
object: copyObjectStrict,
set: copySetStrict,
});
/**
* Get the copiers used for each specific object tag.
*/
function getTagSpecificCopiers(options) {
return {
Arguments: options.object,
Array: options.array,
ArrayBuffer: options.arrayBuffer,
Blob: options.blob,
Boolean: copyPrimitiveWrapper,
DataView: options.dataView,
Date: options.date,
Error: options.error,
Float32Array: options.arrayBuffer,
Float64Array: options.arrayBuffer,
Int8Array: options.arrayBuffer,
Int16Array: options.arrayBuffer,
Int32Array: options.arrayBuffer,
Map: options.map,
Number: copyPrimitiveWrapper,
Object: options.object,
Promise: copySelf,
RegExp: options.regExp,
Set: options.set,
String: copyPrimitiveWrapper,
WeakMap: copySelf,
WeakSet: copySelf,
Uint8Array: options.arrayBuffer,
Uint8ClampedArray: options.arrayBuffer,
Uint16Array: options.arrayBuffer,
Uint32Array: options.arrayBuffer,
Uint64Array: options.arrayBuffer,
};
}
/**
* Create a custom copier based on the object-specific copy methods passed.
*/
function createCopier(options) {
var normalizedOptions = assign({}, DEFAULT_LOOSE_OPTIONS, options);
var tagSpecificCopiers = getTagSpecificCopiers(normalizedOptions);
var array = tagSpecificCopiers.Array, object = tagSpecificCopiers.Object;
function copier(value, state) {
state.prototype = state.Constructor = undefined;
if (!value || typeof value !== 'object') {
return value;
}
if (state.cache.has(value)) {
return state.cache.get(value);
}
state.prototype = getPrototypeOf(value);
state.Constructor = state.prototype && state.prototype.constructor;
// plain objects
if (!state.Constructor || state.Constructor === Object) {
return object(value, state);
}
// arrays
if (isArray(value)) {
return array(value, state);
}
var tagSpecificCopier = tagSpecificCopiers[getTag(value)];
if (tagSpecificCopier) {
return tagSpecificCopier(value, state);
}
return typeof value.then === 'function' ? value : object(value, state);
}
return function copy(value) {
return copier(value, {
Constructor: undefined,
cache: createCache(),
copier: copier,
prototype: undefined,
});
};
}
/**
* Create a custom copier based on the object-specific copy methods passed, defaulting to the
* same internals as `copyStrict`.
*/
function createStrictCopier(options) {
return createCopier(assign({}, DEFAULT_STRICT_OPTIONS, options));
}
/**
* Copy an value deeply as much as possible, where strict recreation of object properties
* are maintained. All properties (including non-enumerable ones) are copied with their
* original property descriptors on both objects and arrays.
*/
var copyStrict = createStrictCopier({});
/**
* Copy an value deeply as much as possible.
*/
var index = createCopier({});
exports.copyStrict = copyStrict;
exports.createCopier = createCopier;
exports.createStrictCopier = createStrictCopier;
exports.default = index;
//# sourceMappingURL=index.cjs.map
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