ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
163 lines • 13.3 kB
JavaScript
/**
* @fileoverview added by tsickle
* Generated from: scroll.ts
* @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* 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 { DOCUMENT } from '@angular/common';
import { Inject, Injectable } from '@angular/core';
import { reqAnimFrame } from 'ng-zorro-antd/core/polyfill';
import * as i0 from "@angular/core";
import * as i1 from "@angular/common";
/**
* @param {?} t
* @param {?} b
* @param {?} c
* @param {?} d
* @return {?}
*/
function easeInOutCubic(t, b, c, d) {
/** @type {?} */
const cc = c - b;
/** @type {?} */
let tt = t / (d / 2);
if (tt < 1) {
return (cc / 2) * tt * tt * tt + b;
}
else {
return (cc / 2) * ((tt -= 2) * tt * tt + 2) + b;
}
}
export class NzScrollService {
/**
* @param {?} doc
*/
constructor(doc) {
this.doc = doc;
}
/**
* Set the position of the scroll bar of `el`.
* @param {?} el
* @param {?=} topValue
* @return {?}
*/
setScrollTop(el, topValue = 0) {
if (el === window) {
this.doc.body.scrollTop = topValue;
(/** @type {?} */ (this.doc.documentElement)).scrollTop = topValue;
}
else {
((/** @type {?} */ (el))).scrollTop = topValue;
}
}
/**
* Get position of `el` against window.
* @param {?} el
* @return {?}
*/
getOffset(el) {
/** @type {?} */
const ret = {
top: 0,
left: 0
};
if (!el || !el.getClientRects().length) {
return ret;
}
/** @type {?} */
const rect = el.getBoundingClientRect();
if (rect.width || rect.height) {
/** @type {?} */
const doc = (/** @type {?} */ (el.ownerDocument)).documentElement;
ret.top = rect.top - (/** @type {?} */ (doc)).clientTop;
ret.left = rect.left - (/** @type {?} */ (doc)).clientLeft;
}
else {
ret.top = rect.top;
ret.left = rect.left;
}
return ret;
}
/**
* Get the position of the scoll bar of `el`.
* @param {?=} el
* @param {?=} top
* @return {?}
*/
// TODO: remove '| Window' as the fallback already happens here
getScroll(el, top = true) {
/** @type {?} */
const target = el ? el : window;
/** @type {?} */
const prop = top ? 'pageYOffset' : 'pageXOffset';
/** @type {?} */
const method = top ? 'scrollTop' : 'scrollLeft';
/** @type {?} */
const isWindow = target === window;
// @ts-ignore
/** @type {?} */
let ret = isWindow ? target[prop] : target[method];
if (isWindow && typeof ret !== 'number') {
ret = (/** @type {?} */ (this.doc.documentElement))[method];
}
return ret;
}
/**
* Scroll `el` to some position with animation.
*
* @param {?} containerEl container, `window` by default
* @param {?=} targetTopValue Scroll to `top`, 0 by default
* @param {?=} easing Transition curve, `easeInOutCubic` by default
* @param {?=} callback callback invoked when transition is done
* @return {?}
*/
scrollTo(containerEl, targetTopValue = 0, easing, callback) {
/** @type {?} */
const target = containerEl ? containerEl : window;
/** @type {?} */
const scrollTop = this.getScroll(target);
/** @type {?} */
const startTime = Date.now();
/** @type {?} */
const frameFunc = (/**
* @return {?}
*/
() => {
/** @type {?} */
const timestamp = Date.now();
/** @type {?} */
const time = timestamp - startTime;
this.setScrollTop(target, (easing || easeInOutCubic)(time, scrollTop, targetTopValue, 450));
if (time < 450) {
reqAnimFrame(frameFunc);
}
else {
if (callback) {
callback();
}
}
});
reqAnimFrame(frameFunc);
}
}
NzScrollService.decorators = [
{ type: Injectable, args: [{
providedIn: 'root'
},] }
];
/** @nocollapse */
NzScrollService.ctorParameters = () => [
{ type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] }
];
/** @nocollapse */ NzScrollService.ɵprov = i0.ɵɵdefineInjectable({ factory: function NzScrollService_Factory() { return new NzScrollService(i0.ɵɵinject(i1.DOCUMENT)); }, token: NzScrollService, providedIn: "root" });
if (false) {
/**
* @type {?}
* @private
*/
NzScrollService.prototype.doc;
}
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'pageYOffset' : 'pageXOffset';\n    const method = top ? 'scrollTop' : 'scrollLeft';\n    const isWindow = target === window;\n    // @ts-ignore\n    let ret = isWindow ? target[prop] : target[method];\n    if (isWindow && typeof ret !== 'number') {\n      ret = this.doc.documentElement![method];\n    }\n    return ret;\n  }\n\n  /**\n   * Scroll `el` to some position with animation.\n   *\n   * @param containerEl container, `window` by default\n   * @param targetTopValue Scroll to `top`, 0 by default\n   * @param easing Transition curve, `easeInOutCubic` by default\n   * @param callback callback invoked when transition is done\n   */\n  scrollTo(containerEl: Element | Window, targetTopValue: number = 0, easing?: EasyingFn, callback?: () => void): void {\n    const target = containerEl ? containerEl : window;\n    const scrollTop = this.getScroll(target);\n    const startTime = Date.now();\n    const frameFunc = () => {\n      const timestamp = Date.now();\n      const time = timestamp - startTime;\n      this.setScrollTop(target, (easing || easeInOutCubic)(time, scrollTop, targetTopValue, 450));\n      if (time < 450) {\n        reqAnimFrame(frameFunc);\n      } else {\n        if (callback) {\n          callback();\n        }\n      }\n    };\n    reqAnimFrame(frameFunc);\n  }\n}\n"]}