@angular/core
Version:
Angular - the core framework
231 lines • 15.8 kB
JavaScript
/**
* @fileoverview added by tsickle
* Generated from: packages/core/src/event_emitter.ts
* @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/// <reference types="rxjs" />
/**
* @license
* Copyright Google Inc. 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
*/
/// <reference types="rxjs" />
import { Subject, Subscription } from 'rxjs';
/**
* Use in components with the `\@Output` directive to emit custom events
* synchronously or asynchronously, and register handlers for those events
* by subscribing to an instance.
*
* \@usageNotes
*
* Extends
* [RxJS `Subject`](https://rxjs.dev/api/index/class/Subject)
* for Angular by adding the `emit()` method.
*
* In the following example, a component defines two output properties
* that create event emitters. When the title is clicked, the emitter
* emits an open or close event to toggle the current visibility state.
*
* ```html
* \@Component({
* selector: 'zippy',
* template: `
* <div class="zippy">
* <div (click)="toggle()">Toggle</div>
* <div [hidden]="!visible">
* <ng-content></ng-content>
* </div>
* </div>`})
* export class Zippy {
* visible: boolean = true;
* \@Output() open: EventEmitter<any> = new EventEmitter();
* \@Output() close: EventEmitter<any> = new EventEmitter();
*
* toggle() {
* this.visible = !this.visible;
* if (this.visible) {
* this.open.emit(null);
* } else {
* this.close.emit(null);
* }
* }
* }
* ```
*
* Access the event object with the `$event` argument passed to the output event
* handler:
*
* ```html
* <zippy (open)="onOpen($event)" (close)="onClose($event)"></zippy>
* ```
*
* @see [Observables in Angular](guide/observables-in-angular)
* \@publicApi
* @template T
*/
export class EventEmitter extends Subject {
// tslint:disable-line
/**
* Creates an instance of this class that can
* deliver events synchronously or asynchronously.
*
* @param {?=} isAsync When true, deliver events asynchronously.
*
*/
constructor(isAsync = false) {
super();
this.__isAsync = isAsync;
}
/**
* Emits an event containing a given value.
* @param {?=} value The value to emit.
* @return {?}
*/
emit(value) {
super.next(value);
}
/**
* Registers handlers for events emitted by this instance.
* @param {?=} generatorOrNext When supplied, a custom handler for emitted events.
* @param {?=} error When supplied, a custom handler for an error notification
* from this emitter.
* @param {?=} complete When supplied, a custom handler for a completion
* notification from this emitter.
* @return {?}
*/
subscribe(generatorOrNext, error, complete) {
/** @type {?} */
let schedulerFn;
/** @type {?} */
let errorFn = (/**
* @param {?} err
* @return {?}
*/
(err) => null);
/** @type {?} */
let completeFn = (/**
* @return {?}
*/
() => null);
if (generatorOrNext && typeof generatorOrNext === 'object') {
schedulerFn = this.__isAsync ? (/**
* @param {?} value
* @return {?}
*/
(value) => {
setTimeout((/**
* @return {?}
*/
() => generatorOrNext.next(value)));
}) : (/**
* @param {?} value
* @return {?}
*/
(value) => {
generatorOrNext.next(value);
});
if (generatorOrNext.error) {
errorFn = this.__isAsync ? (/**
* @param {?} err
* @return {?}
*/
(err) => {
setTimeout((/**
* @return {?}
*/
() => generatorOrNext.error(err)));
}) : (/**
* @param {?} err
* @return {?}
*/
(err) => {
generatorOrNext.error(err);
});
}
if (generatorOrNext.complete) {
completeFn = this.__isAsync ? (/**
* @return {?}
*/
() => {
setTimeout((/**
* @return {?}
*/
() => generatorOrNext.complete()));
}) : (/**
* @return {?}
*/
() => {
generatorOrNext.complete();
});
}
}
else {
schedulerFn = this.__isAsync ? (/**
* @param {?} value
* @return {?}
*/
(value) => {
setTimeout((/**
* @return {?}
*/
() => generatorOrNext(value)));
}) : (/**
* @param {?} value
* @return {?}
*/
(value) => {
generatorOrNext(value);
});
if (error) {
errorFn = this.__isAsync ? (/**
* @param {?} err
* @return {?}
*/
(err) => {
setTimeout((/**
* @return {?}
*/
() => error(err)));
}) : (/**
* @param {?} err
* @return {?}
*/
(err) => {
error(err);
});
}
if (complete) {
completeFn = this.__isAsync ? (/**
* @return {?}
*/
() => {
setTimeout((/**
* @return {?}
*/
() => complete()));
}) : (/**
* @return {?}
*/
() => {
complete();
});
}
}
/** @type {?} */
const sink = super.subscribe(schedulerFn, errorFn, completeFn);
if (generatorOrNext instanceof Subscription) {
generatorOrNext.add(sink);
}
return sink;
}
}
if (false) {
/**
* \@internal
* @type {?}
*/
EventEmitter.prototype.__isAsync;
}
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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\n/// <reference types=\"rxjs\" />\n\nimport {Subject, Subscription} from 'rxjs';\n\n/**\n * Use in components with the `@Output` directive to emit custom events\n * synchronously or asynchronously, and register handlers for those events\n * by subscribing to an instance.\n *\n * @usageNotes\n *\n * Extends\n * [RxJS `Subject`](https://rxjs.dev/api/index/class/Subject)\n * for Angular by adding the `emit()` method.\n *\n * In the following example, a component defines two output properties\n * that create event emitters. When the title is clicked, the emitter\n * emits an open or close event to toggle the current visibility state.\n *\n * ```html\n * @Component({\n *   selector: 'zippy',\n *   template: `\n *   <div class=\"zippy\">\n *     <div (click)=\"toggle()\">Toggle</div>\n *     <div [hidden]=\"!visible\">\n *       <ng-content></ng-content>\n *     </div>\n *  </div>`})\n * export class Zippy {\n *   visible: boolean = true;\n *   @Output() open: EventEmitter<any> = new EventEmitter();\n *   @Output() close: EventEmitter<any> = new EventEmitter();\n *\n *   toggle() {\n *     this.visible = !this.visible;\n *     if (this.visible) {\n *       this.open.emit(null);\n *     } else {\n *       this.close.emit(null);\n *     }\n *   }\n * }\n * ```\n *\n * Access the event object with the `$event` argument passed to the output event\n * handler:\n *\n * ```html\n * <zippy (open)=\"onOpen($event)\" (close)=\"onClose($event)\"></zippy>\n * ```\n *\n * @see [Observables in Angular](guide/observables-in-angular)\n * @publicApi\n */\nexport class EventEmitter<T extends any> extends Subject<T> {\n  /**\n   * @internal\n   */\n  __isAsync: boolean;  // tslint:disable-line\n\n  /**\n   * Creates an instance of this class that can\n   * deliver events synchronously or asynchronously.\n   *\n   * @param isAsync When true, deliver events asynchronously.\n   *\n   */\n  constructor(isAsync: boolean = false) {\n    super();\n    this.__isAsync = isAsync;\n  }\n\n  /**\n   * Emits an event containing a given value.\n   * @param value The value to emit.\n   */\n  emit(value?: T) {\n    super.next(value);\n  }\n\n  /**\n   * Registers handlers for events emitted by this instance.\n   * @param generatorOrNext When supplied, a custom handler for emitted events.\n   * @param error When supplied, a custom handler for an error notification\n   * from this emitter.\n   * @param complete When supplied, a custom handler for a completion\n   * notification from this emitter.\n   */\n  subscribe(generatorOrNext?: any, error?: any, complete?: any): Subscription {\n    let schedulerFn: (t: any) => any;\n    let errorFn = (err: any): any => null;\n    let completeFn = (): any => null;\n\n    if (generatorOrNext && typeof generatorOrNext === 'object') {\n      schedulerFn = this.__isAsync ? (value: any) => {\n        setTimeout(() => generatorOrNext.next(value));\n      } : (value: any) => {\n        generatorOrNext.next(value);\n      };\n\n      if (generatorOrNext.error) {\n        errorFn = this.__isAsync ? (err) => {\n          setTimeout(() => generatorOrNext.error(err));\n        } : (err) => {\n          generatorOrNext.error(err);\n        };\n      }\n\n      if (generatorOrNext.complete) {\n        completeFn = this.__isAsync ? () => {\n          setTimeout(() => generatorOrNext.complete());\n        } : () => {\n          generatorOrNext.complete();\n        };\n      }\n    } else {\n      schedulerFn = this.__isAsync ? (value: any) => {\n        setTimeout(() => generatorOrNext(value));\n      } : (value: any) => {\n        generatorOrNext(value);\n      };\n\n      if (error) {\n        errorFn = this.__isAsync ? (err) => {\n          setTimeout(() => error(err));\n        } : (err) => {\n          error(err);\n        };\n      }\n\n      if (complete) {\n        completeFn = this.__isAsync ? () => {\n          setTimeout(() => complete());\n        } : () => {\n          complete();\n        };\n      }\n    }\n\n    const sink = super.subscribe(schedulerFn, errorFn, completeFn);\n\n    if (generatorOrNext instanceof Subscription) {\n      generatorOrNext.add(sink);\n    }\n\n    return sink;\n  }\n}\n"]}