ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
209 lines • 15.3 kB
JavaScript
/**
* @fileoverview added by tsickle
* Generated from: resize-observers.service.ts
* @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* @license
* Copyright Alibaba.com 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://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
*/
import { coerceElement } from '@angular/cdk/coercion';
import { Injectable } from '@angular/core';
import ResizeObserver from 'resize-observer-polyfill';
import { Observable, Subject } from 'rxjs';
import * as i0 from "@angular/core";
/**
* Factory that creates a new ResizeObserver and allows us to stub it out in unit tests.
*/
var NzResizeObserverFactory = /** @class */ (function () {
function NzResizeObserverFactory() {
}
/**
* @param {?} callback
* @return {?}
*/
NzResizeObserverFactory.prototype.create = /**
* @param {?} callback
* @return {?}
*/
function (callback) {
return typeof ResizeObserver === 'undefined' ? null : new ResizeObserver(callback);
};
NzResizeObserverFactory.decorators = [
{ type: Injectable, args: [{ providedIn: 'root' },] }
];
/** @nocollapse */ NzResizeObserverFactory.ɵprov = i0.ɵɵdefineInjectable({ factory: function NzResizeObserverFactory_Factory() { return new NzResizeObserverFactory(); }, token: NzResizeObserverFactory, providedIn: "root" });
return NzResizeObserverFactory;
}());
export { NzResizeObserverFactory };
/**
* An injectable service that allows watching elements for changes to their content.
*/
var NzResizeObserver = /** @class */ (function () {
function NzResizeObserver(nzResizeObserverFactory) {
this.nzResizeObserverFactory = nzResizeObserverFactory;
/**
* Keeps track of the existing ResizeObservers so they can be reused.
*/
this.observedElements = new Map();
}
/**
* @return {?}
*/
NzResizeObserver.prototype.ngOnDestroy = /**
* @return {?}
*/
function () {
var _this = this;
this.observedElements.forEach((/**
* @param {?} _
* @param {?} element
* @return {?}
*/
function (_, element) { return _this.cleanupObserver(element); }));
};
/**
* @param {?} elementOrRef
* @return {?}
*/
NzResizeObserver.prototype.observe = /**
* @param {?} elementOrRef
* @return {?}
*/
function (elementOrRef) {
var _this = this;
/** @type {?} */
var element = coerceElement(elementOrRef);
return new Observable((/**
* @param {?} observer
* @return {?}
*/
function (observer) {
/** @type {?} */
var stream = _this.observeElement(element);
/** @type {?} */
var subscription = stream.subscribe(observer);
return (/**
* @return {?}
*/
function () {
subscription.unsubscribe();
_this.unobserveElement(element);
});
}));
};
/**
* Observes the given element by using the existing ResizeObserver if available, or creating a
* new one if not.
*/
/**
* Observes the given element by using the existing ResizeObserver if available, or creating a
* new one if not.
* @private
* @param {?} element
* @return {?}
*/
NzResizeObserver.prototype.observeElement = /**
* Observes the given element by using the existing ResizeObserver if available, or creating a
* new one if not.
* @private
* @param {?} element
* @return {?}
*/
function (element) {
if (!this.observedElements.has(element)) {
/** @type {?} */
var stream_1 = new Subject();
/** @type {?} */
var observer = this.nzResizeObserverFactory.create((/**
* @param {?} mutations
* @return {?}
*/
function (mutations) { return stream_1.next(mutations); }));
if (observer) {
observer.observe(element);
}
this.observedElements.set(element, { observer: observer, stream: stream_1, count: 1 });
}
else {
(/** @type {?} */ (this.observedElements.get(element))).count++;
}
return (/** @type {?} */ (this.observedElements.get(element))).stream;
};
/**
* Un-observes the given element and cleans up the underlying ResizeObserver if nobody else is
* observing this element.
*/
/**
* Un-observes the given element and cleans up the underlying ResizeObserver if nobody else is
* observing this element.
* @private
* @param {?} element
* @return {?}
*/
NzResizeObserver.prototype.unobserveElement = /**
* Un-observes the given element and cleans up the underlying ResizeObserver if nobody else is
* observing this element.
* @private
* @param {?} element
* @return {?}
*/
function (element) {
if (this.observedElements.has(element)) {
(/** @type {?} */ (this.observedElements.get(element))).count--;
if (!(/** @type {?} */ (this.observedElements.get(element))).count) {
this.cleanupObserver(element);
}
}
};
/** Clean up the underlying ResizeObserver for the specified element. */
/**
* Clean up the underlying ResizeObserver for the specified element.
* @private
* @param {?} element
* @return {?}
*/
NzResizeObserver.prototype.cleanupObserver = /**
* Clean up the underlying ResizeObserver for the specified element.
* @private
* @param {?} element
* @return {?}
*/
function (element) {
if (this.observedElements.has(element)) {
var _a = (/** @type {?} */ (this.observedElements.get(element))), observer = _a.observer, stream = _a.stream;
if (observer) {
observer.disconnect();
}
stream.complete();
this.observedElements.delete(element);
}
};
NzResizeObserver.decorators = [
{ type: Injectable, args: [{ providedIn: 'root' },] }
];
/** @nocollapse */
NzResizeObserver.ctorParameters = function () { return [
{ type: NzResizeObserverFactory }
]; };
/** @nocollapse */ NzResizeObserver.ɵprov = i0.ɵɵdefineInjectable({ factory: function NzResizeObserver_Factory() { return new NzResizeObserver(i0.ɵɵinject(NzResizeObserverFactory)); }, token: NzResizeObserver, providedIn: "root" });
return NzResizeObserver;
}());
export { NzResizeObserver };
if (false) {
/**
* Keeps track of the existing ResizeObservers so they can be reused.
* @type {?}
* @private
*/
NzResizeObserver.prototype.observedElements;
/**
* @type {?}
* @private
*/
NzResizeObserver.prototype.nzResizeObserverFactory;
}
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null : new ResizeObserver(callback);\n  }\n}\n\n/** An injectable service that allows watching elements for changes to their content. */\n@Injectable({ providedIn: 'root' })\nexport class NzResizeObserver implements OnDestroy {\n  /** Keeps track of the existing ResizeObservers so they can be reused. */\n  private observedElements = new Map<\n    Element,\n    {\n      observer: ResizeObserver | null;\n      stream: Subject<ResizeObserverEntry[]>;\n      count: number;\n    }\n  >();\n\n  constructor(private nzResizeObserverFactory: NzResizeObserverFactory) {}\n\n  ngOnDestroy(): void {\n    this.observedElements.forEach((_, element) => this.cleanupObserver(element));\n  }\n\n  observe(elementOrRef: Element | ElementRef<Element>): Observable<ResizeObserverEntry[]> {\n    const element = coerceElement(elementOrRef);\n\n    return new Observable((observer: Observer<ResizeObserverEntry[]>) => {\n      const stream = this.observeElement(element);\n      const subscription = stream.subscribe(observer);\n\n      return () => {\n        subscription.unsubscribe();\n        this.unobserveElement(element);\n      };\n    });\n  }\n\n  /**\n   * Observes the given element by using the existing ResizeObserver if available, or creating a\n   * new one if not.\n   */\n  private observeElement(element: Element): Subject<ResizeObserverEntry[]> {\n    if (!this.observedElements.has(element)) {\n      const stream = new Subject<ResizeObserverEntry[]>();\n      const observer = this.nzResizeObserverFactory.create(mutations => stream.next(mutations));\n      if (observer) {\n        observer.observe(element);\n      }\n      this.observedElements.set(element, { observer, stream, count: 1 });\n    } else {\n      this.observedElements.get(element)!.count++;\n    }\n    return this.observedElements.get(element)!.stream;\n  }\n\n  /**\n   * Un-observes the given element and cleans up the underlying ResizeObserver if nobody else is\n   * observing this element.\n   */\n  private unobserveElement(element: Element): void {\n    if (this.observedElements.has(element)) {\n      this.observedElements.get(element)!.count--;\n      if (!this.observedElements.get(element)!.count) {\n        this.cleanupObserver(element);\n      }\n    }\n  }\n\n  /** Clean up the underlying ResizeObserver for the specified element. */\n  private cleanupObserver(element: Element): void {\n    if (this.observedElements.has(element)) {\n      const { observer, stream } = this.observedElements.get(element)!;\n      if (observer) {\n        observer.disconnect();\n      }\n      stream.complete();\n      this.observedElements.delete(element);\n    }\n  }\n}\n"]}