111 lines
3.5 KiB
TypeScript
111 lines
3.5 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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// TODO(jteplitz602): Load WorkerGlobalScope from lib.webworker.d.ts file #3492
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declare var WorkerGlobalScope: any /** TODO #9100 */;
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// CommonJS / Node have global context exposed as "global" variable.
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// We don't want to include the whole node.d.ts this this compilation unit so we'll just fake
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// the global "global" var for now.
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declare var global: any /** TODO #9100 */;
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const __window = typeof window !== 'undefined' && window;
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const __self = typeof self !== 'undefined' && typeof WorkerGlobalScope !== 'undefined' &&
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self instanceof WorkerGlobalScope && self;
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const __global = typeof global !== 'undefined' && global;
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// Check __global first, because in Node tests both __global and __window may be defined and _global
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// should be __global in that case.
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const _global: {[name: string]: any} = __global || __window || __self;
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const promise: Promise<any> = Promise.resolve(0);
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/**
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* Attention: whenever providing a new value, be sure to add an
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* entry into the corresponding `....externs.js` file,
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* so that closure won't use that global for its purposes.
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*/
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export {_global as global};
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// When Symbol.iterator doesn't exist, retrieves the key used in es6-shim
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declare const Symbol: any;
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let _symbolIterator: any = null;
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export function getSymbolIterator(): string|symbol {
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if (!_symbolIterator) {
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const Symbol = _global['Symbol'];
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if (Symbol && Symbol.iterator) {
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_symbolIterator = Symbol.iterator;
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} else {
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// es6-shim specific logic
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const keys = Object.getOwnPropertyNames(Map.prototype);
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for (let i = 0; i < keys.length; ++i) {
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const key = keys[i];
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if (key !== 'entries' && key !== 'size' &&
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(Map as any).prototype[key] === Map.prototype['entries']) {
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_symbolIterator = key;
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}
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}
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}
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}
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return _symbolIterator;
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}
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export function scheduleMicroTask(fn: Function) {
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if (typeof Zone === 'undefined') {
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// use promise to schedule microTask instead of use Zone
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promise.then(() => { fn && fn.apply(null, null); });
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} else {
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Zone.current.scheduleMicroTask('scheduleMicrotask', fn);
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}
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}
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// JS has NaN !== NaN
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export function looseIdentical(a: any, b: any): boolean {
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return a === b || typeof a === 'number' && typeof b === 'number' && isNaN(a) && isNaN(b);
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}
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export function stringify(token: any): string {
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if (typeof token === 'string') {
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return token;
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}
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if (token instanceof Array) {
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return '[' + token.map(stringify).join(', ') + ']';
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}
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if (token == null) {
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return '' + token;
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}
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if (token.overriddenName) {
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return `${token.overriddenName}`;
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}
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if (token.name) {
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return `${token.name}`;
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}
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const res = token.toString();
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if (res == null) {
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return '' + res;
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}
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const newLineIndex = res.indexOf('\n');
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return newLineIndex === -1 ? res : res.substring(0, newLineIndex);
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}
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/**
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* Convince closure compiler that the wrapped function has no side-effects.
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*
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* Closure compiler always assumes that `toString` has no side-effects. We use this quirk to
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* allow us to execute a function but have closure compiler mark the call as no-side-effects.
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* It is important that the return value for the `noSideEffects` function be assigned
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* to something which is retained otherwise the call to `noSideEffects` will be removed by closure
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* compiler.
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*/
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export function noSideEffects(fn: () => void): string {
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return '' + {toString: fn};
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} |