Vihren Atlas

src/vs/base/common/objects.ts

286 LOC · 270 covered · 16 uncovered · 82 ranges · 10161 concepts · 42 introducers · 5181 tests

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1 > /*--------------------------------------------------------------------------------------------- objects.ts ×13
2 > * Copyright (c) Microsoft Corporation. All rights reserved.
3 > * Licensed under the MIT License. See License.txt in the project root for license information.
4 > *--------------------------------------------------------------------------------------------*/
5 >
6 > import { isTypedArray, isObject, isUndefinedOrNull } from './types.js';
7 >
8 > export function deepClone<T>(obj: T): T {
9 > if (!obj || typeof obj !== 'object') { objects.ts ×3
10 > return obj; objects.ts ×1
11 > }
12 > if (obj instanceof RegExp) { objects.ts ×1
13 > return obj; taskConfiguration.ts ×2
14 > }
15 > const result: any = Array.isArray(obj) ? [] : {}; objects.ts ×3
16 > Object.entries(obj).forEach(([key, value]) => {
17 > result[key] = value && typeof value === 'object' ? deepClone(value) : value; objects.ts ×1
18 > }); objects.ts ×3
19 > return result;
20 > }
21 > objects.ts ×13
22 > export function deepFreeze<T>(obj: T): T {
23 > if (!obj || typeof obj !== 'object') { objects.ts ×3
24 return obj;
25 }
26 > const stack: any[] = [obj]; objects.ts ×3
27 > while (stack.length > 0) {
28 > const obj = stack.shift();
29 > Object.freeze(obj);
30 > for (const key in obj) {
31 > if (_hasOwnProperty.call(obj, key)) {
32 > const prop = obj[key];
33 > if (typeof prop === 'object' && !Object.isFrozen(prop) && !isTypedArray(prop)) {
34 > stack.push(prop); objects.ts ×1
35 > }
36 > } objects.ts ×3
37 > }
38 > }
39 > return obj;
40 > }
41 > objects.ts ×13
42 > const _hasOwnProperty = Object.prototype.hasOwnProperty;
43 >
44 >
45 > export function cloneAndChange(obj: any, changer: (orig: any) => any): any {
46 > return _cloneAndChange(obj, changer, new Set()); objects.ts ×6
47 > }
48 > objects.ts ×13
49 > function _cloneAndChange(obj: any, changer: (orig: any) => any, seen: Set<any>): any { objects.ts ×6
50 > if (isUndefinedOrNull(obj)) {
51 > return obj; objects.ts ×1
52 > }
53 > objects.ts ×6
54 > const changed = changer(obj);
55 > if (typeof changed !== 'undefined') {
56 > return changed; objects.ts ×1
57 > }
58 > objects.ts ×6
59 > if (Array.isArray(obj)) {
60 > const r1: any[] = []; objects.ts ×1
61 > for (const e of obj) {
62 > r1.push(_cloneAndChange(e, changer, seen));
63 > }
64 > return r1;
65 > }
66 > objects.ts ×6
67 > if (isObject(obj)) {
68 > if (seen.has(obj)) {
69 throw new Error('Cannot clone recursive data-structure');
70 }
71 > seen.add(obj); objects.ts ×6
72 > const r2: Record<string, unknown> = {};
73 > for (const i2 in obj) {
74 > if (_hasOwnProperty.call(obj, i2)) {
75 > r2[i2] = _cloneAndChange(obj[i2], changer, seen);
76 > }
77 > }
78 > seen.delete(obj);
79 > return r2;
80 > }
81 > objects.ts ×1
82 > return obj;
83 > }
84 > objects.ts ×13
85 > /**
86 > * Copies all properties of source into destination. The optional parameter "overwrite" allows to control
87 > * if existing properties on the destination should be overwritten or not. Defaults to true (overwrite).
88 > */
89 > export function mixin(destination: any, source: any, overwrite: boolean = true): any {
90 > if (!isObject(destination)) { objects.ts ×4
91 return source;
92 }
93 > objects.ts ×4
94 > if (isObject(source)) {
95 > Object.keys(source).forEach(key => {
96 > if (key in destination) {
97 > if (overwrite) { objects.ts ×1
98 if (isObject(destination[key]) && isObject(source[key])) {
99 mixin(destination[key], source[key], overwrite);
100 } else {
101 destination[key] = source[key];
102 }
103 }
104 > } else { objects.ts ×4
105 > destination[key] = source[key]; objects.ts ×1
106 > }
107 > }); objects.ts ×4
108 > }
109 > return destination;
110 > }
111 > objects.ts ×13
112 > export function equals(one: any, other: any): boolean {
113 > if (one === other) { objects.ts ×2
114 > return true; objects.ts ×1
115 > }
116 > if (one === null || one === undefined || other === null || other === undefined) { objects.ts ×2
117 > return false; objects.ts ×1
118 > }
119 > if (typeof one !== typeof other) { objects.ts ×2
120 > return false; objects.ts ×2
121 > }
122 > if (typeof one !== 'object') { objects.ts ×2
123 > return false; objects.ts ×1
124 > }
125 > if ((Array.isArray(one)) !== (Array.isArray(other))) { objects.ts ×3
126 > return false; objects.ts ×2
127 > }
128 > objects.ts ×3
129 > let i: number;
130 > let key: string;
131 >
132 > if (Array.isArray(one)) {
133 > if (one.length !== other.length) {
134 > return false; objects.ts ×1
135 > }
136 > for (i = 0; i < one.length; i++) { objects.ts ×1
137 > if (!equals(one[i], other[i])) { objects.ts ×2
138 > return false; objects.ts ×1
139 > }
140 > } objects.ts ×2
141 > } else { objects.ts ×3
142 > const oneKeys: string[] = []; objects.ts ×4
143 >
144 > for (key in one) {
145 > oneKeys.push(key); objects.ts ×1
146 > }
147 > oneKeys.sort(); objects.ts ×4
148 > const otherKeys: string[] = [];
149 > for (key in other) {
150 > otherKeys.push(key); objects.ts ×1
151 > }
152 > otherKeys.sort(); objects.ts ×4
153 > if (!equals(oneKeys, otherKeys)) {
154 > return false; objects.ts ×1
155 > }
156 > for (i = 0; i < oneKeys.length; i++) { objects.ts ×1
157 > if (!equals(one[oneKeys[i]], other[oneKeys[i]])) { objects.ts ×2
158 > return false; objects.ts ×1
159 > }
160 > } objects.ts ×2
161 > } objects.ts ×4
162 > return true; objects.ts ×1
163 > }
164 > objects.ts ×13
165 > /**
166 > * Calls `JSON.Stringify` with a replacer to break apart any circular references.
167 > * This prevents `JSON`.stringify` from throwing the exception
168 > * "Uncaught TypeError: Converting circular structure to JSON"
169 > */
170 > export function safeStringify(obj: any): string {
171 > const seen = new Set<any>(); objects.ts ×3
172 > return JSON.stringify(obj, (key, value) => {
173 > if (isObject(value) || Array.isArray(value)) {
174 > if (seen.has(value)) {
175 > return '[Circular]'; objects.ts ×2
176 > } else { objects.ts ×3
177 > seen.add(value);
178 > }
179 > }
180 > if (typeof value === 'bigint') {
181 > return `[BigInt ${value.toString()}]`; objects.ts ×2
182 > }
183 > return value; objects.ts ×3
184 > });
185 > }
186 > objects.ts ×13
187 > /**
188 > * Like `JSON.stringify`, but with deterministic ordering of object keys so that
189 > * structurally equal inputs always produce the same string. Useful for cache
190 > * keys derived from arbitrary object payloads.
191 > *
192 > * - Object keys are sorted at every level of nesting.
193 > * - Properties whose value is `undefined` are omitted (matching `JSON.stringify`).
194 > * - Circular references are replaced with the string `"[Circular]"` to avoid
195 > * throwing.
196 > * - A top-level `undefined` returns the string `'undefined'`; any other
197 > * stringification failure returns the empty string.
198 > */
199 > export function stableStringify(value: unknown): string {
200 > if (value === undefined) { objects.ts ×3
201 > return 'undefined';
202 > }
203 > try {
204 > return _stableStringify(value, new WeakSet());
205 > } catch {
206 return '';
207 }
208 > } objects.ts ×3
209 > objects.ts ×13
210 > function _stableStringify(value: unknown, seen: WeakSet<object>): string { objects.ts ×3
211 > if (value === null || typeof value !== 'object') {
212 > return JSON.stringify(value) ?? 'null';
213 > }
214 > if (seen.has(value as object)) {
215 > return '"[Circular]"';
216 > }
217 > seen.add(value as object);
218 > if (Array.isArray(value)) {
219 > return '[' + value.map(v => _stableStringify(v, seen)).join(',') + ']';
220 > }
221 > const keys = Object.keys(value as object).sort();
222 > const parts: string[] = [];
223 > for (const k of keys) {
224 > const v = (value as Record<string, unknown>)[k];
225 > if (v === undefined) {
226 > continue;
227 > }
228 > parts.push(JSON.stringify(k) + ':' + _stableStringify(v, seen));
229 > }
230 > return '{' + parts.join(',') + '}';
231 > }
232 > objects.ts ×13
233 > type obj = { [key: string]: any };
234 > /**
235 > * Returns an object that has keys for each value that is different in the base object. Keys
236 > * that do not exist in the target but in the base object are not considered.
237 > *
238 > * Note: This is not a deep-diffing method, so the values are strictly taken into the resulting
239 > * object if they differ.
240 > *
241 > * @param base the object to diff against
242 > * @param obj the object to use for diffing
243 > */
244 > export function distinct(base: obj, target: obj): obj {
245 > const result = Object.create(null); objects.ts ×2
246 >
247 > if (!base || !target) {
248 return result;
249 }
250 > objects.ts ×2
251 > const targetKeys = Object.keys(target);
252 > targetKeys.forEach(k => {
253 > const baseValue = base[k];
254 > const targetValue = target[k];
255 >
256 > if (!equals(baseValue, targetValue)) {
257 > result[k] = targetValue;
258 > }
259 > });
260 >
261 > return result;
262 > }
263 > objects.ts ×13
264 > export function getCaseInsensitive(target: obj, key: string): unknown {
265 > const lowercaseKey = key.toLowerCase(); objects.ts ×1
266 > const equivalentKey = Object.keys(target).find(k => k.toLowerCase() === lowercaseKey);
267 > return equivalentKey ? target[equivalentKey] : target[key];
268 > }
269 > objects.ts ×13
270 > export function filter(obj: obj, predicate: (key: string, value: any) => boolean): obj {
271 > const result = Object.create(null); debugger.ts ×5
272 > for (const [key, value] of Object.entries(obj)) {
273 > if (predicate(key, value)) {
274 > result[key] = value;
275 > }
276 > }
277 > return result;
278 > }
279 > objects.ts ×13
280 > export function mapValues<T extends {}, R>(obj: T, fn: (value: T[keyof T], key: string) => R): { [K in keyof T]: R } {
281 > const result: { [key: string]: R } = {}; objects.ts ×1
282 > for (const [key, value] of Object.entries(obj)) {
283 > result[key] = fn(<T[keyof T]>value, key);
284 > }
285 > return result as { [K in keyof T]: R };
286 > }