@angular/core
Version:
Angular - the core framework
191 lines • 28.5 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { Subscription } from 'rxjs';
import { ApplicationRef } from '../../application/application_ref';
import { ENVIRONMENT_INITIALIZER, inject, Injectable, InjectionToken, makeEnvironmentProviders, } from '../../di';
import { ErrorHandler, INTERNAL_APPLICATION_ERROR_HANDLER } from '../../error_handler';
import { RuntimeError } from '../../errors';
import { PendingTasks } from '../../pending_tasks';
import { performanceMarkFeature } from '../../util/performance';
import { NgZone } from '../../zone';
import { ChangeDetectionScheduler, ZONELESS_SCHEDULER_DISABLED, ZONELESS_ENABLED, } from './zoneless_scheduling';
import * as i0 from "../../r3_symbols";
export class NgZoneChangeDetectionScheduler {
constructor() {
this.zone = inject(NgZone);
this.changeDetectionScheduler = inject(ChangeDetectionScheduler);
this.applicationRef = inject(ApplicationRef);
}
initialize() {
if (this._onMicrotaskEmptySubscription) {
return;
}
this._onMicrotaskEmptySubscription = this.zone.onMicrotaskEmpty.subscribe({
next: () => {
// `onMicroTaskEmpty` can happen _during_ the zoneless scheduler change detection because
// zone.run(() => {}) will result in `checkStable` at the end of the `zone.run` closure
// and emit `onMicrotaskEmpty` synchronously if run coalsecing is false.
if (this.changeDetectionScheduler.runningTick) {
return;
}
this.zone.run(() => {
this.applicationRef.tick();
});
},
});
}
ngOnDestroy() {
this._onMicrotaskEmptySubscription?.unsubscribe();
}
static { this.ɵfac = function NgZoneChangeDetectionScheduler_Factory(t) { return new (t || NgZoneChangeDetectionScheduler)(); }; }
static { this.ɵprov = /*@__PURE__*/ i0.ɵɵdefineInjectable({ token: NgZoneChangeDetectionScheduler, factory: NgZoneChangeDetectionScheduler.ɵfac, providedIn: 'root' }); }
}
(() => { (typeof ngDevMode === "undefined" || ngDevMode) && i0.setClassMetadata(NgZoneChangeDetectionScheduler, [{
type: Injectable,
args: [{ providedIn: 'root' }]
}], null, null); })();
/**
* Internal token used to verify that `provideZoneChangeDetection` is not used
* with the bootstrapModule API.
*/
export const PROVIDED_NG_ZONE = new InjectionToken(typeof ngDevMode === 'undefined' || ngDevMode ? 'provideZoneChangeDetection token' : '', { factory: () => false });
export function internalProvideZoneChangeDetection({ ngZoneFactory, ignoreChangesOutsideZone, }) {
ngZoneFactory ??= () => new NgZone(getNgZoneOptions());
return [
{ provide: NgZone, useFactory: ngZoneFactory },
{
provide: ENVIRONMENT_INITIALIZER,
multi: true,
useFactory: () => {
const ngZoneChangeDetectionScheduler = inject(NgZoneChangeDetectionScheduler, {
optional: true,
});
if ((typeof ngDevMode === 'undefined' || ngDevMode) &&
ngZoneChangeDetectionScheduler === null) {
throw new RuntimeError(402 /* RuntimeErrorCode.MISSING_REQUIRED_INJECTABLE_IN_BOOTSTRAP */, `A required Injectable was not found in the dependency injection tree. ` +
'If you are bootstrapping an NgModule, make sure that the `BrowserModule` is imported.');
}
return () => ngZoneChangeDetectionScheduler.initialize();
},
},
{
provide: ENVIRONMENT_INITIALIZER,
multi: true,
useFactory: () => {
const service = inject(ZoneStablePendingTask);
return () => {
service.initialize();
};
},
},
{ provide: INTERNAL_APPLICATION_ERROR_HANDLER, useFactory: ngZoneApplicationErrorHandlerFactory },
// Always disable scheduler whenever explicitly disabled, even if another place called
// `provideZoneChangeDetection` without the 'ignore' option.
ignoreChangesOutsideZone === true ? { provide: ZONELESS_SCHEDULER_DISABLED, useValue: true } : [],
];
}
export function ngZoneApplicationErrorHandlerFactory() {
const zone = inject(NgZone);
const userErrorHandler = inject(ErrorHandler);
return (e) => zone.runOutsideAngular(() => userErrorHandler.handleError(e));
}
/**
* Provides `NgZone`-based change detection for the application bootstrapped using
* `bootstrapApplication`.
*
* `NgZone` is already provided in applications by default. This provider allows you to configure
* options like `eventCoalescing` in the `NgZone`.
* This provider is not available for `platformBrowser().bootstrapModule`, which uses
* `BootstrapOptions` instead.
*
* @usageNotes
* ```typescript
* bootstrapApplication(MyApp, {providers: [
* provideZoneChangeDetection({eventCoalescing: true}),
* ]});
* ```
*
* @publicApi
* @see {@link bootstrapApplication}
* @see {@link NgZoneOptions}
*/
export function provideZoneChangeDetection(options) {
const ignoreChangesOutsideZone = options?.ignoreChangesOutsideZone;
const zoneProviders = internalProvideZoneChangeDetection({
ngZoneFactory: () => {
const ngZoneOptions = getNgZoneOptions(options);
if (ngZoneOptions.shouldCoalesceEventChangeDetection) {
performanceMarkFeature('NgZone_CoalesceEvent');
}
return new NgZone(ngZoneOptions);
},
ignoreChangesOutsideZone,
});
return makeEnvironmentProviders([
{ provide: PROVIDED_NG_ZONE, useValue: true },
{ provide: ZONELESS_ENABLED, useValue: false },
zoneProviders,
]);
}
// Transforms a set of `BootstrapOptions` (supported by the NgModule-based bootstrap APIs) ->
// `NgZoneOptions` that are recognized by the NgZone constructor. Passing no options will result in
// a set of default options returned.
export function getNgZoneOptions(options) {
return {
enableLongStackTrace: typeof ngDevMode === 'undefined' ? false : !!ngDevMode,
shouldCoalesceEventChangeDetection: options?.eventCoalescing ?? false,
shouldCoalesceRunChangeDetection: options?.runCoalescing ?? false,
};
}
export class ZoneStablePendingTask {
constructor() {
this.subscription = new Subscription();
this.initialized = false;
this.zone = inject(NgZone);
this.pendingTasks = inject(PendingTasks);
}
initialize() {
if (this.initialized) {
return;
}
this.initialized = true;
let task = null;
if (!this.zone.isStable && !this.zone.hasPendingMacrotasks && !this.zone.hasPendingMicrotasks) {
task = this.pendingTasks.add();
}
this.zone.runOutsideAngular(() => {
this.subscription.add(this.zone.onStable.subscribe(() => {
NgZone.assertNotInAngularZone();
// Check whether there are no pending macro/micro tasks in the next tick
// to allow for NgZone to update the state.
queueMicrotask(() => {
if (task !== null &&
!this.zone.hasPendingMacrotasks &&
!this.zone.hasPendingMicrotasks) {
this.pendingTasks.remove(task);
task = null;
}
});
}));
});
this.subscription.add(this.zone.onUnstable.subscribe(() => {
NgZone.assertInAngularZone();
task ??= this.pendingTasks.add();
}));
}
ngOnDestroy() {
this.subscription.unsubscribe();
}
static { this.ɵfac = function ZoneStablePendingTask_Factory(t) { return new (t || ZoneStablePendingTask)(); }; }
static { this.ɵprov = /*@__PURE__*/ i0.ɵɵdefineInjectable({ token: ZoneStablePendingTask, factory: ZoneStablePendingTask.ɵfac, providedIn: 'root' }); }
}
(() => { (typeof ngDevMode === "undefined" || ngDevMode) && i0.setClassMetadata(ZoneStablePendingTask, [{
type: Injectable,
args: [{ providedIn: 'root' }]
}], null, null); })();
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Subscription} from 'rxjs';\n\nimport {ApplicationRef} from '../../application/application_ref';\nimport {\n  ENVIRONMENT_INITIALIZER,\n  EnvironmentProviders,\n  inject,\n  Injectable,\n  InjectionToken,\n  makeEnvironmentProviders,\n  StaticProvider,\n} from '../../di';\nimport {ErrorHandler, INTERNAL_APPLICATION_ERROR_HANDLER} from '../../error_handler';\nimport {RuntimeError, RuntimeErrorCode} from '../../errors';\nimport {PendingTasks} from '../../pending_tasks';\nimport {performanceMarkFeature} from '../../util/performance';\nimport {NgZone} from '../../zone';\nimport {InternalNgZoneOptions} from '../../zone/ng_zone';\n\nimport {\n  ChangeDetectionScheduler,\n  ZONELESS_SCHEDULER_DISABLED,\n  ZONELESS_ENABLED,\n} from './zoneless_scheduling';\n\n@Injectable({providedIn: 'root'})\nexport class NgZoneChangeDetectionScheduler {\n  private readonly zone = inject(NgZone);\n  private readonly changeDetectionScheduler = inject(ChangeDetectionScheduler);\n  private readonly applicationRef = inject(ApplicationRef);\n\n  private _onMicrotaskEmptySubscription?: Subscription;\n\n  initialize(): void {\n    if (this._onMicrotaskEmptySubscription) {\n      return;\n    }\n\n    this._onMicrotaskEmptySubscription = this.zone.onMicrotaskEmpty.subscribe({\n      next: () => {\n        // `onMicroTaskEmpty` can happen _during_ the zoneless scheduler change detection because\n        // zone.run(() => {}) will result in `checkStable` at the end of the `zone.run` closure\n        // and emit `onMicrotaskEmpty` synchronously if run coalsecing is false.\n        if (this.changeDetectionScheduler.runningTick) {\n          return;\n        }\n        this.zone.run(() => {\n          this.applicationRef.tick();\n        });\n      },\n    });\n  }\n\n  ngOnDestroy() {\n    this._onMicrotaskEmptySubscription?.unsubscribe();\n  }\n}\n\n/**\n * Internal token used to verify that `provideZoneChangeDetection` is not used\n * with the bootstrapModule API.\n */\nexport const PROVIDED_NG_ZONE = new InjectionToken<boolean>(\n  typeof ngDevMode === 'undefined' || ngDevMode ? 'provideZoneChangeDetection token' : '',\n  {factory: () => false},\n);\n\nexport function internalProvideZoneChangeDetection({\n  ngZoneFactory,\n  ignoreChangesOutsideZone,\n}: {\n  ngZoneFactory?: () => NgZone;\n  ignoreChangesOutsideZone?: boolean;\n}): StaticProvider[] {\n  ngZoneFactory ??= () => new NgZone(getNgZoneOptions());\n  return [\n    {provide: NgZone, useFactory: ngZoneFactory},\n    {\n      provide: ENVIRONMENT_INITIALIZER,\n      multi: true,\n      useFactory: () => {\n        const ngZoneChangeDetectionScheduler = inject(NgZoneChangeDetectionScheduler, {\n          optional: true,\n        });\n        if (\n          (typeof ngDevMode === 'undefined' || ngDevMode) &&\n          ngZoneChangeDetectionScheduler === null\n        ) {\n          throw new RuntimeError(\n            RuntimeErrorCode.MISSING_REQUIRED_INJECTABLE_IN_BOOTSTRAP,\n            `A required Injectable was not found in the dependency injection tree. ` +\n              'If you are bootstrapping an NgModule, make sure that the `BrowserModule` is imported.',\n          );\n        }\n        return () => ngZoneChangeDetectionScheduler!.initialize();\n      },\n    },\n    {\n      provide: ENVIRONMENT_INITIALIZER,\n      multi: true,\n      useFactory: () => {\n        const service = inject(ZoneStablePendingTask);\n        return () => {\n          service.initialize();\n        };\n      },\n    },\n    {provide: INTERNAL_APPLICATION_ERROR_HANDLER, useFactory: ngZoneApplicationErrorHandlerFactory},\n    // Always disable scheduler whenever explicitly disabled, even if another place called\n    // `provideZoneChangeDetection` without the 'ignore' option.\n    ignoreChangesOutsideZone === true ? {provide: ZONELESS_SCHEDULER_DISABLED, useValue: true} : [],\n  ];\n}\n\nexport function ngZoneApplicationErrorHandlerFactory() {\n  const zone = inject(NgZone);\n  const userErrorHandler = inject(ErrorHandler);\n  return (e: unknown) => zone.runOutsideAngular(() => userErrorHandler.handleError(e));\n}\n\n/**\n * Provides `NgZone`-based change detection for the application bootstrapped using\n * `bootstrapApplication`.\n *\n * `NgZone` is already provided in applications by default. This provider allows you to configure\n * options like `eventCoalescing` in the `NgZone`.\n * This provider is not available for `platformBrowser().bootstrapModule`, which uses\n * `BootstrapOptions` instead.\n *\n * @usageNotes\n * ```typescript\n * bootstrapApplication(MyApp, {providers: [\n *   provideZoneChangeDetection({eventCoalescing: true}),\n * ]});\n * ```\n *\n * @publicApi\n * @see {@link bootstrapApplication}\n * @see {@link NgZoneOptions}\n */\nexport function provideZoneChangeDetection(options?: NgZoneOptions): EnvironmentProviders {\n  const ignoreChangesOutsideZone = options?.ignoreChangesOutsideZone;\n  const zoneProviders = internalProvideZoneChangeDetection({\n    ngZoneFactory: () => {\n      const ngZoneOptions = getNgZoneOptions(options);\n      if (ngZoneOptions.shouldCoalesceEventChangeDetection) {\n        performanceMarkFeature('NgZone_CoalesceEvent');\n      }\n      return new NgZone(ngZoneOptions);\n    },\n    ignoreChangesOutsideZone,\n  });\n  return makeEnvironmentProviders([\n    {provide: PROVIDED_NG_ZONE, useValue: true},\n    {provide: ZONELESS_ENABLED, useValue: false},\n    zoneProviders,\n  ]);\n}\n\n/**\n * Used to configure event and run coalescing with `provideZoneChangeDetection`.\n *\n * @publicApi\n *\n * @see {@link provideZoneChangeDetection}\n */\nexport interface NgZoneOptions {\n  /**\n   * Optionally specify coalescing event change detections or not.\n   * Consider the following case.\n   *\n   * ```\n   * <div (click)=\"doSomething()\">\n   *   <button (click)=\"doSomethingElse()\"></button>\n   * </div>\n   * ```\n   *\n   * When button is clicked, because of the event bubbling, both\n   * event handlers will be called and 2 change detections will be\n   * triggered. We can coalesce such kind of events to only trigger\n   * change detection only once.\n   *\n   * By default, this option will be false. So the events will not be\n   * coalesced and the change detection will be triggered multiple times.\n   * And if this option be set to true, the change detection will be\n   * triggered async by scheduling a animation frame. So in the case above,\n   * the change detection will only be triggered once.\n   */\n  eventCoalescing?: boolean;\n\n  /**\n   * Optionally specify if `NgZone#run()` method invocations should be coalesced\n   * into a single change detection.\n   *\n   * Consider the following case.\n   * ```\n   * for (let i = 0; i < 10; i ++) {\n   *   ngZone.run(() => {\n   *     // do something\n   *   });\n   * }\n   * ```\n   *\n   * This case triggers the change detection multiple times.\n   * With ngZoneRunCoalescing options, all change detections in an event loop trigger only once.\n   * In addition, the change detection executes in requestAnimation.\n   *\n   */\n  runCoalescing?: boolean;\n\n  /**\n   * When false, change detection is scheduled when Angular receives\n   * a clear indication that templates need to be refreshed. This includes:\n   *\n   * - calling `ChangeDetectorRef.markForCheck`\n   * - calling `ComponentRef.setInput`\n   * - updating a signal that is read in a template\n   * - when bound host or template listeners are triggered\n   * - attaching a view that is marked dirty\n   * - removing a view\n   * - registering a render hook (templates are only refreshed if render hooks do one of the above)\n   */\n  ignoreChangesOutsideZone?: boolean;\n}\n\n// Transforms a set of `BootstrapOptions` (supported by the NgModule-based bootstrap APIs) ->\n// `NgZoneOptions` that are recognized by the NgZone constructor. Passing no options will result in\n// a set of default options returned.\nexport function getNgZoneOptions(options?: NgZoneOptions): InternalNgZoneOptions {\n  return {\n    enableLongStackTrace: typeof ngDevMode === 'undefined' ? false : !!ngDevMode,\n    shouldCoalesceEventChangeDetection: options?.eventCoalescing ?? false,\n    shouldCoalesceRunChangeDetection: options?.runCoalescing ?? false,\n  };\n}\n\n@Injectable({providedIn: 'root'})\nexport class ZoneStablePendingTask {\n  private readonly subscription = new Subscription();\n  private initialized = false;\n  private readonly zone = inject(NgZone);\n  private readonly pendingTasks = inject(PendingTasks);\n\n  initialize() {\n    if (this.initialized) {\n      return;\n    }\n    this.initialized = true;\n\n    let task: number | null = null;\n    if (!this.zone.isStable && !this.zone.hasPendingMacrotasks && !this.zone.hasPendingMicrotasks) {\n      task = this.pendingTasks.add();\n    }\n\n    this.zone.runOutsideAngular(() => {\n      this.subscription.add(\n        this.zone.onStable.subscribe(() => {\n          NgZone.assertNotInAngularZone();\n\n          // Check whether there are no pending macro/micro tasks in the next tick\n          // to allow for NgZone to update the state.\n          queueMicrotask(() => {\n            if (\n              task !== null &&\n              !this.zone.hasPendingMacrotasks &&\n              !this.zone.hasPendingMicrotasks\n            ) {\n              this.pendingTasks.remove(task);\n              task = null;\n            }\n          });\n        }),\n      );\n    });\n\n    this.subscription.add(\n      this.zone.onUnstable.subscribe(() => {\n        NgZone.assertInAngularZone();\n        task ??= this.pendingTasks.add();\n      }),\n    );\n  }\n\n  ngOnDestroy() {\n    this.subscription.unsubscribe();\n  }\n}\n"]}