@angular/cdk
Version:
Angular Material Component Development Kit
117 lines • 16.3 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 { Platform, normalizePassiveListenerOptions } from '@angular/cdk/platform';
import { Directive, ElementRef, EventEmitter, Injectable, NgZone, Output, } from '@angular/core';
import { coerceElement } from '@angular/cdk/coercion';
import { EMPTY, Subject } from 'rxjs';
import * as i0 from "@angular/core";
import * as i1 from "@angular/cdk/platform";
/** Options to pass to the animationstart listener. */
const listenerOptions = normalizePassiveListenerOptions({ passive: true });
/**
* An injectable service that can be used to monitor the autofill state of an input.
* Based on the following blog post:
* https://medium.com/@brunn/detecting-autofilled-fields-in-javascript-aed598d25da7
*/
export class AutofillMonitor {
constructor(_platform, _ngZone) {
this._platform = _platform;
this._ngZone = _ngZone;
this._monitoredElements = new Map();
}
monitor(elementOrRef) {
if (!this._platform.isBrowser) {
return EMPTY;
}
const element = coerceElement(elementOrRef);
const info = this._monitoredElements.get(element);
if (info) {
return info.subject;
}
const result = new Subject();
const cssClass = 'cdk-text-field-autofilled';
const listener = ((event) => {
// Animation events fire on initial element render, we check for the presence of the autofill
// CSS class to make sure this is a real change in state, not just the initial render before
// we fire off events.
if (event.animationName === 'cdk-text-field-autofill-start' &&
!element.classList.contains(cssClass)) {
element.classList.add(cssClass);
this._ngZone.run(() => result.next({ target: event.target, isAutofilled: true }));
}
else if (event.animationName === 'cdk-text-field-autofill-end' &&
element.classList.contains(cssClass)) {
element.classList.remove(cssClass);
this._ngZone.run(() => result.next({ target: event.target, isAutofilled: false }));
}
});
this._ngZone.runOutsideAngular(() => {
element.addEventListener('animationstart', listener, listenerOptions);
element.classList.add('cdk-text-field-autofill-monitored');
});
this._monitoredElements.set(element, {
subject: result,
unlisten: () => {
element.removeEventListener('animationstart', listener, listenerOptions);
}
});
return result;
}
stopMonitoring(elementOrRef) {
const element = coerceElement(elementOrRef);
const info = this._monitoredElements.get(element);
if (info) {
info.unlisten();
info.subject.complete();
element.classList.remove('cdk-text-field-autofill-monitored');
element.classList.remove('cdk-text-field-autofilled');
this._monitoredElements.delete(element);
}
}
ngOnDestroy() {
this._monitoredElements.forEach((_info, element) => this.stopMonitoring(element));
}
}
AutofillMonitor.ɵprov = i0.ɵɵdefineInjectable({ factory: function AutofillMonitor_Factory() { return new AutofillMonitor(i0.ɵɵinject(i1.Platform), i0.ɵɵinject(i0.NgZone)); }, token: AutofillMonitor, providedIn: "root" });
AutofillMonitor.decorators = [
{ type: Injectable, args: [{ providedIn: 'root' },] }
];
AutofillMonitor.ctorParameters = () => [
{ type: Platform },
{ type: NgZone }
];
/** A directive that can be used to monitor the autofill state of an input. */
export class CdkAutofill {
constructor(_elementRef, _autofillMonitor) {
this._elementRef = _elementRef;
this._autofillMonitor = _autofillMonitor;
/** Emits when the autofill state of the element changes. */
this.cdkAutofill = new EventEmitter();
}
ngOnInit() {
this._autofillMonitor
.monitor(this._elementRef)
.subscribe(event => this.cdkAutofill.emit(event));
}
ngOnDestroy() {
this._autofillMonitor.stopMonitoring(this._elementRef);
}
}
CdkAutofill.decorators = [
{ type: Directive, args: [{
selector: '[cdkAutofill]',
},] }
];
CdkAutofill.ctorParameters = () => [
{ type: ElementRef },
{ type: AutofillMonitor }
];
CdkAutofill.propDecorators = {
cdkAutofill: [{ type: Output }]
};
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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 {Platform, normalizePassiveListenerOptions} from '@angular/cdk/platform';\nimport {\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Injectable,\n  NgZone,\n  OnDestroy,\n  OnInit,\n  Output,\n} from '@angular/core';\nimport {coerceElement} from '@angular/cdk/coercion';\nimport {EMPTY, Observable, Subject} from 'rxjs';\n\n\n/** An event that is emitted when the autofill state of an input changes. */\nexport type AutofillEvent = {\n  /** The element whose autofill state changes. */\n  target: Element;\n  /** Whether the element is currently autofilled. */\n  isAutofilled: boolean;\n};\n\n\n/** Used to track info about currently monitored elements. */\ntype MonitoredElementInfo = {\n  subject: Subject<AutofillEvent>;\n  unlisten: () => void;\n};\n\n\n/** Options to pass to the animationstart listener. */\nconst listenerOptions = normalizePassiveListenerOptions({passive: true});\n\n\n/**\n * An injectable service that can be used to monitor the autofill state of an input.\n * Based on the following blog post:\n * https://medium.com/@brunn/detecting-autofilled-fields-in-javascript-aed598d25da7\n */\n@Injectable({providedIn: 'root'})\nexport class AutofillMonitor implements OnDestroy {\n  private _monitoredElements = new Map<Element, MonitoredElementInfo>();\n\n  constructor(private _platform: Platform, private _ngZone: NgZone) {}\n\n  /**\n   * Monitor for changes in the autofill state of the given input element.\n   * @param element The element to monitor.\n   * @return A stream of autofill state changes.\n   */\n  monitor(element: Element): Observable<AutofillEvent>;\n\n  /**\n   * Monitor for changes in the autofill state of the given input element.\n   * @param element The element to monitor.\n   * @return A stream of autofill state changes.\n   */\n  monitor(element: ElementRef<Element>): Observable<AutofillEvent>;\n\n  monitor(elementOrRef: Element | ElementRef<Element>): Observable<AutofillEvent> {\n    if (!this._platform.isBrowser) {\n      return EMPTY;\n    }\n\n    const element = coerceElement(elementOrRef);\n    const info = this._monitoredElements.get(element);\n\n    if (info) {\n      return info.subject;\n    }\n\n    const result = new Subject<AutofillEvent>();\n    const cssClass = 'cdk-text-field-autofilled';\n    const listener = ((event: AnimationEvent) => {\n      // Animation events fire on initial element render, we check for the presence of the autofill\n      // CSS class to make sure this is a real change in state, not just the initial render before\n      // we fire off events.\n      if (event.animationName === 'cdk-text-field-autofill-start' &&\n          !element.classList.contains(cssClass)) {\n        element.classList.add(cssClass);\n        this._ngZone.run(() => result.next({target: event.target as Element, isAutofilled: true}));\n      } else if (event.animationName === 'cdk-text-field-autofill-end' &&\n          element.classList.contains(cssClass)) {\n        element.classList.remove(cssClass);\n        this._ngZone.run(() => result.next({target: event.target as Element, isAutofilled: false}));\n      }\n    }) as EventListenerOrEventListenerObject;\n\n    this._ngZone.runOutsideAngular(() => {\n      element.addEventListener('animationstart', listener, listenerOptions);\n      element.classList.add('cdk-text-field-autofill-monitored');\n    });\n\n    this._monitoredElements.set(element, {\n      subject: result,\n      unlisten: () => {\n        element.removeEventListener('animationstart', listener, listenerOptions);\n      }\n    });\n\n    return result;\n  }\n\n  /**\n   * Stop monitoring the autofill state of the given input element.\n   * @param element The element to stop monitoring.\n   */\n  stopMonitoring(element: Element): void;\n\n  /**\n   * Stop monitoring the autofill state of the given input element.\n   * @param element The element to stop monitoring.\n   */\n  stopMonitoring(element: ElementRef<Element>): void;\n\n  stopMonitoring(elementOrRef: Element | ElementRef<Element>): void {\n    const element = coerceElement(elementOrRef);\n    const info = this._monitoredElements.get(element);\n\n    if (info) {\n      info.unlisten();\n      info.subject.complete();\n      element.classList.remove('cdk-text-field-autofill-monitored');\n      element.classList.remove('cdk-text-field-autofilled');\n      this._monitoredElements.delete(element);\n    }\n  }\n\n  ngOnDestroy() {\n    this._monitoredElements.forEach((_info, element) => this.stopMonitoring(element));\n  }\n}\n\n\n/** A directive that can be used to monitor the autofill state of an input. */\n@Directive({\n  selector: '[cdkAutofill]',\n})\nexport class CdkAutofill implements OnDestroy, OnInit {\n  /** Emits when the autofill state of the element changes. */\n  @Output() cdkAutofill: EventEmitter<AutofillEvent> = new EventEmitter<AutofillEvent>();\n\n  constructor(private _elementRef: ElementRef<HTMLElement>,\n              private _autofillMonitor: AutofillMonitor) {}\n\n  ngOnInit() {\n    this._autofillMonitor\n      .monitor(this._elementRef)\n      .subscribe(event => this.cdkAutofill.emit(event));\n  }\n\n  ngOnDestroy() {\n    this._autofillMonitor.stopMonitoring(this._elementRef);\n  }\n}\n"]}