ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
179 lines (172 loc) • 8.25 kB
JavaScript
import * as i0 from '@angular/core';
import { Injectable, EventEmitter, booleanAttribute, Input, Output, Directive, NgModule } from '@angular/core';
import { coerceElement } from '@angular/cdk/coercion';
import { Observable, Subject } from 'rxjs';
/**
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
*/
/**
* Factory that creates a new ResizeObserver and allows us to stub it out in unit tests.
*/
class NzResizeObserverFactory {
create(callback) {
return typeof ResizeObserver === 'undefined' ? null : new ResizeObserver(callback);
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "19.2.2", ngImport: i0, type: NzResizeObserverFactory, deps: [], target: i0.ɵɵFactoryTarget.Injectable });
static ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "19.2.2", ngImport: i0, type: NzResizeObserverFactory, providedIn: 'root' });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "19.2.2", ngImport: i0, type: NzResizeObserverFactory, decorators: [{
type: Injectable,
args: [{ providedIn: 'root' }]
}] });
/** An injectable service that allows watching elements for changes to their content. */
class NzResizeObserver {
nzResizeObserverFactory;
/** Keeps track of the existing ResizeObservers so they can be reused. */
observedElements = new Map();
constructor(nzResizeObserverFactory) {
this.nzResizeObserverFactory = nzResizeObserverFactory;
}
ngOnDestroy() {
this.observedElements.forEach((_, element) => this.cleanupObserver(element));
}
observe(elementOrRef) {
const element = coerceElement(elementOrRef);
return new Observable((observer) => {
const stream = this.observeElement(element);
const subscription = stream.subscribe(observer);
return () => {
subscription.unsubscribe();
this.unobserveElement(element);
};
});
}
/**
* Observes the given element by using the existing ResizeObserver if available, or creating a
* new one if not.
*/
observeElement(element) {
if (!this.observedElements.has(element)) {
const stream = new Subject();
const observer = this.nzResizeObserverFactory.create((mutations) => stream.next(mutations));
if (observer) {
observer.observe(element);
}
this.observedElements.set(element, { observer, stream, count: 1 });
}
else {
this.observedElements.get(element).count++;
}
return this.observedElements.get(element).stream;
}
/**
* Un-observes the given element and cleans up the underlying ResizeObserver if nobody else is
* observing this element.
*/
unobserveElement(element) {
if (this.observedElements.has(element)) {
this.observedElements.get(element).count--;
if (!this.observedElements.get(element).count) {
this.cleanupObserver(element);
}
}
}
/** Clean up the underlying ResizeObserver for the specified element. */
cleanupObserver(element) {
if (this.observedElements.has(element)) {
const { observer, stream } = this.observedElements.get(element);
if (observer) {
observer.disconnect();
}
stream.complete();
this.observedElements.delete(element);
}
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "19.2.2", ngImport: i0, type: NzResizeObserver, deps: [{ token: NzResizeObserverFactory }], target: i0.ɵɵFactoryTarget.Injectable });
static ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "19.2.2", ngImport: i0, type: NzResizeObserver, providedIn: 'root' });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "19.2.2", ngImport: i0, type: NzResizeObserver, decorators: [{
type: Injectable,
args: [{ providedIn: 'root' }]
}], ctorParameters: () => [{ type: NzResizeObserverFactory }] });
/**
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
*/
class NzResizeObserverDirective {
nzResizeObserver;
elementRef;
nzResizeObserve = new EventEmitter();
nzResizeObserverDisabled = false;
currentSubscription = null;
subscribe() {
this.unsubscribe();
this.currentSubscription = this.nzResizeObserver.observe(this.elementRef).subscribe(this.nzResizeObserve);
}
unsubscribe() {
this.currentSubscription?.unsubscribe();
}
constructor(nzResizeObserver, elementRef) {
this.nzResizeObserver = nzResizeObserver;
this.elementRef = elementRef;
}
ngAfterContentInit() {
if (!this.currentSubscription && !this.nzResizeObserverDisabled) {
this.subscribe();
}
}
ngOnDestroy() {
this.unsubscribe();
}
ngOnChanges(changes) {
const { nzResizeObserve } = changes;
if (nzResizeObserve) {
if (this.nzResizeObserverDisabled) {
this.unsubscribe();
}
else {
this.subscribe();
}
}
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "19.2.2", ngImport: i0, type: NzResizeObserverDirective, deps: [{ token: NzResizeObserver }, { token: i0.ElementRef }], target: i0.ɵɵFactoryTarget.Directive });
static ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "16.1.0", version: "19.2.2", type: NzResizeObserverDirective, isStandalone: true, selector: "[nzResizeObserver]", inputs: { nzResizeObserverDisabled: ["nzResizeObserverDisabled", "nzResizeObserverDisabled", booleanAttribute] }, outputs: { nzResizeObserve: "nzResizeObserve" }, providers: [NzResizeObserverFactory], usesOnChanges: true, ngImport: i0 });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "19.2.2", ngImport: i0, type: NzResizeObserverDirective, decorators: [{
type: Directive,
args: [{
selector: '[nzResizeObserver]',
providers: [NzResizeObserverFactory]
}]
}], ctorParameters: () => [{ type: NzResizeObserver }, { type: i0.ElementRef }], propDecorators: { nzResizeObserve: [{
type: Output
}], nzResizeObserverDisabled: [{
type: Input,
args: [{ transform: booleanAttribute }]
}] } });
/**
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
*/
class NzResizeObserverModule {
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "19.2.2", ngImport: i0, type: NzResizeObserverModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });
static ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: "14.0.0", version: "19.2.2", ngImport: i0, type: NzResizeObserverModule, imports: [NzResizeObserverDirective], exports: [NzResizeObserverDirective] });
static ɵinj = i0.ɵɵngDeclareInjector({ minVersion: "12.0.0", version: "19.2.2", ngImport: i0, type: NzResizeObserverModule });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "19.2.2", ngImport: i0, type: NzResizeObserverModule, decorators: [{
type: NgModule,
args: [{
imports: [NzResizeObserverDirective],
exports: [NzResizeObserverDirective]
}]
}] });
/**
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
*/
/**
* Generated bundle index. Do not edit.
*/
export { NzResizeObserver, NzResizeObserverDirective, NzResizeObserverFactory, NzResizeObserverModule };
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