ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
243 lines • 32.3 kB
JavaScript
/**
* 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 { __decorate, __metadata } from "tslib";
import { Platform } from '@angular/cdk/platform';
import { DOCUMENT } from '@angular/common';
import { ChangeDetectionStrategy, Component, ElementRef, EventEmitter, Inject, Input, NgZone, Output, Renderer2, ViewChild, ViewEncapsulation } from '@angular/core';
import { NzConfigService, WithConfig } from 'ng-zorro-antd/core/config';
import { NzScrollService } from 'ng-zorro-antd/core/services';
import { getStyleAsText, InputNumber, shallowEqual } from 'ng-zorro-antd/core/util';
import { fromEvent, merge, ReplaySubject, Subject, Subscription } from 'rxjs';
import { auditTime, map, takeUntil } from 'rxjs/operators';
import { AffixRespondEvents } from './respond-events';
import { getTargetRect } from './utils';
const NZ_CONFIG_MODULE_NAME = 'affix';
const NZ_AFFIX_CLS_PREFIX = 'ant-affix';
const NZ_AFFIX_DEFAULT_SCROLL_TIME = 20;
export class NzAffixComponent {
constructor(el, doc, nzConfigService, scrollSrv, ngZone, platform, renderer) {
this.nzConfigService = nzConfigService;
this.scrollSrv = scrollSrv;
this.ngZone = ngZone;
this.platform = platform;
this.renderer = renderer;
this._nzModuleName = NZ_CONFIG_MODULE_NAME;
this.nzChange = new EventEmitter();
this.positionChangeSubscription = Subscription.EMPTY;
this.offsetChanged$ = new ReplaySubject(1);
this.destroy$ = new Subject();
// The wrapper would stay at the original position as a placeholder.
this.placeholderNode = el.nativeElement;
this.document = doc;
}
get target() {
const el = this.nzTarget;
return (typeof el === 'string' ? this.document.querySelector(el) : el) || window;
}
ngOnChanges(changes) {
const { nzOffsetBottom, nzOffsetTop, nzTarget } = changes;
if (nzOffsetBottom || nzOffsetTop) {
this.offsetChanged$.next();
}
if (nzTarget) {
this.registerListeners();
}
}
ngAfterViewInit() {
this.registerListeners();
}
ngOnDestroy() {
this.removeListeners();
}
registerListeners() {
if (!this.platform.isBrowser) {
return;
}
this.removeListeners();
this.positionChangeSubscription = this.ngZone.runOutsideAngular(() => {
return merge(...Object.keys(AffixRespondEvents).map(evName => fromEvent(this.target, evName)), this.offsetChanged$.pipe(takeUntil(this.destroy$), map(() => ({}))))
.pipe(auditTime(NZ_AFFIX_DEFAULT_SCROLL_TIME))
.subscribe(e => this.updatePosition(e));
});
this.timeout = setTimeout(() => this.updatePosition({}));
}
removeListeners() {
clearTimeout(this.timeout);
this.positionChangeSubscription.unsubscribe();
this.destroy$.next();
this.destroy$.complete();
}
getOffset(element, target) {
const elemRect = element.getBoundingClientRect();
const targetRect = getTargetRect(target);
const scrollTop = this.scrollSrv.getScroll(target, true);
const scrollLeft = this.scrollSrv.getScroll(target, false);
const docElem = this.document.body;
const clientTop = docElem.clientTop || 0;
const clientLeft = docElem.clientLeft || 0;
return {
top: elemRect.top - targetRect.top + scrollTop - clientTop,
left: elemRect.left - targetRect.left + scrollLeft - clientLeft,
width: elemRect.width,
height: elemRect.height
};
}
setAffixStyle(e, affixStyle) {
const originalAffixStyle = this.affixStyle;
const isWindow = this.target === window;
if (e.type === 'scroll' && originalAffixStyle && affixStyle && isWindow) {
return;
}
if (shallowEqual(originalAffixStyle, affixStyle)) {
return;
}
const fixed = !!affixStyle;
const wrapEl = this.fixedEl.nativeElement;
this.renderer.setStyle(wrapEl, 'cssText', getStyleAsText(affixStyle));
this.affixStyle = affixStyle;
if (fixed) {
wrapEl.classList.add(NZ_AFFIX_CLS_PREFIX);
}
else {
wrapEl.classList.remove(NZ_AFFIX_CLS_PREFIX);
}
if ((affixStyle && !originalAffixStyle) || (!affixStyle && originalAffixStyle)) {
this.nzChange.emit(fixed);
}
}
setPlaceholderStyle(placeholderStyle) {
const originalPlaceholderStyle = this.placeholderStyle;
if (shallowEqual(placeholderStyle, originalPlaceholderStyle)) {
return;
}
this.renderer.setStyle(this.placeholderNode, 'cssText', getStyleAsText(placeholderStyle));
this.placeholderStyle = placeholderStyle;
}
syncPlaceholderStyle(e) {
if (!this.affixStyle) {
return;
}
this.renderer.setStyle(this.placeholderNode, 'cssText', '');
this.placeholderStyle = undefined;
const styleObj = {
width: this.placeholderNode.offsetWidth,
height: this.fixedEl.nativeElement.offsetHeight
};
this.setAffixStyle(e, Object.assign(Object.assign({}, this.affixStyle), styleObj));
this.setPlaceholderStyle(styleObj);
}
updatePosition(e) {
if (!this.platform.isBrowser) {
return;
}
const targetNode = this.target;
let offsetTop = this.nzOffsetTop;
const scrollTop = this.scrollSrv.getScroll(targetNode, true);
const elemOffset = this.getOffset(this.placeholderNode, targetNode);
const fixedNode = this.fixedEl.nativeElement;
const elemSize = {
width: fixedNode.offsetWidth,
height: fixedNode.offsetHeight
};
const offsetMode = {
top: false,
bottom: false
};
// Default to `offsetTop=0`.
if (typeof offsetTop !== 'number' && typeof this.nzOffsetBottom !== 'number') {
offsetMode.top = true;
offsetTop = 0;
}
else {
offsetMode.top = typeof offsetTop === 'number';
offsetMode.bottom = typeof this.nzOffsetBottom === 'number';
}
const targetRect = getTargetRect(targetNode);
const targetInnerHeight = targetNode.innerHeight || targetNode.clientHeight;
if (scrollTop >= elemOffset.top - offsetTop && offsetMode.top) {
const width = elemOffset.width;
const top = targetRect.top + offsetTop;
this.setAffixStyle(e, {
position: 'fixed',
top,
left: targetRect.left + elemOffset.left,
width
});
this.setPlaceholderStyle({
width,
height: elemSize.height
});
}
else if (scrollTop <= elemOffset.top + elemSize.height + this.nzOffsetBottom - targetInnerHeight && offsetMode.bottom) {
const targetBottomOffset = targetNode === window ? 0 : window.innerHeight - targetRect.bottom;
const width = elemOffset.width;
this.setAffixStyle(e, {
position: 'fixed',
bottom: targetBottomOffset + this.nzOffsetBottom,
left: targetRect.left + elemOffset.left,
width
});
this.setPlaceholderStyle({
width,
height: elemOffset.height
});
}
else {
if (e.type === AffixRespondEvents.resize &&
this.affixStyle &&
this.affixStyle.position === 'fixed' &&
this.placeholderNode.offsetWidth) {
this.setAffixStyle(e, Object.assign(Object.assign({}, this.affixStyle), { width: this.placeholderNode.offsetWidth }));
}
else {
this.setAffixStyle(e);
}
this.setPlaceholderStyle();
}
if (e.type === 'resize') {
this.syncPlaceholderStyle(e);
}
}
}
NzAffixComponent.decorators = [
{ type: Component, args: [{
selector: 'nz-affix',
exportAs: 'nzAffix',
template: `
<div #fixedEl>
<ng-content></ng-content>
</div>
`,
changeDetection: ChangeDetectionStrategy.OnPush,
encapsulation: ViewEncapsulation.None
},] }
];
NzAffixComponent.ctorParameters = () => [
{ type: ElementRef },
{ type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] },
{ type: NzConfigService },
{ type: NzScrollService },
{ type: NgZone },
{ type: Platform },
{ type: Renderer2 }
];
NzAffixComponent.propDecorators = {
fixedEl: [{ type: ViewChild, args: ['fixedEl', { static: true },] }],
nzTarget: [{ type: Input }],
nzOffsetTop: [{ type: Input }],
nzOffsetBottom: [{ type: Input }],
nzChange: [{ type: Output }]
};
__decorate([
WithConfig(),
InputNumber(undefined),
__metadata("design:type", Object)
], NzAffixComponent.prototype, "nzOffsetTop", void 0);
__decorate([
WithConfig(),
InputNumber(undefined),
__metadata("design:type", Object)
], NzAffixComponent.prototype, "nzOffsetBottom", void 0);
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'rxjs/operators';\n\nimport { AffixRespondEvents } from './respond-events';\nimport { getTargetRect, SimpleRect } from './utils';\n\nconst NZ_CONFIG_MODULE_NAME: NzConfigKey = 'affix';\nconst NZ_AFFIX_CLS_PREFIX = 'ant-affix';\nconst NZ_AFFIX_DEFAULT_SCROLL_TIME = 20;\n\n@Component({\n  selector: 'nz-affix',\n  exportAs: 'nzAffix',\n  template: `\n    <div #fixedEl>\n      <ng-content></ng-content>\n    </div>\n  `,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None\n})\nexport class NzAffixComponent implements AfterViewInit, OnChanges, OnDestroy {\n  readonly _nzModuleName: NzConfigKey = NZ_CONFIG_MODULE_NAME;\n  static ngAcceptInputType_nzOffsetTop: NumberInput;\n  static ngAcceptInputType_nzOffsetBottom: NumberInput;\n\n  @ViewChild('fixedEl', { static: true }) private fixedEl!: ElementRef<HTMLDivElement>;\n\n  @Input() nzTarget?: string | Element | Window;\n\n  @Input()\n  @WithConfig<number | null>()\n  @InputNumber(undefined)\n  nzOffsetTop?: null | number;\n\n  @Input()\n  @WithConfig<number | null>()\n  @InputNumber(undefined)\n  nzOffsetBottom?: null | number;\n\n  @Output() readonly nzChange = new EventEmitter<boolean>();\n\n  private readonly placeholderNode: HTMLElement;\n\n  private affixStyle?: NgStyleInterface;\n  private placeholderStyle?: NgStyleInterface;\n  private positionChangeSubscription: Subscription = Subscription.EMPTY;\n  private offsetChanged$ = new ReplaySubject(1);\n  private destroy$ = new Subject<void>();\n  private timeout?: number;\n  private document: Document;\n\n  private get target(): Element | Window {\n    const el = this.nzTarget;\n    return (typeof el === 'string' ? this.document.querySelector(el) : el) || window;\n  }\n\n  constructor(\n    el: ElementRef,\n    @Inject(DOCUMENT) doc: NzSafeAny,\n    public nzConfigService: NzConfigService,\n    private scrollSrv: NzScrollService,\n    private ngZone: NgZone,\n    private platform: Platform,\n    private renderer: Renderer2\n  ) {\n    // The wrapper would stay at the original position as a placeholder.\n    this.placeholderNode = el.nativeElement;\n    this.document = doc;\n  }\n\n  ngOnChanges(changes: SimpleChanges): void {\n    const { nzOffsetBottom, nzOffsetTop, nzTarget } = changes;\n\n    if (nzOffsetBottom || nzOffsetTop) {\n      this.offsetChanged$.next();\n    }\n    if (nzTarget) {\n      this.registerListeners();\n    }\n  }\n\n  ngAfterViewInit(): void {\n    this.registerListeners();\n  }\n\n  ngOnDestroy(): void {\n    this.removeListeners();\n  }\n\n  private registerListeners(): void {\n    if (!this.platform.isBrowser) {\n      return;\n    }\n\n    this.removeListeners();\n    this.positionChangeSubscription = this.ngZone.runOutsideAngular(() => {\n      return merge(\n        ...Object.keys(AffixRespondEvents).map(evName => fromEvent(this.target, evName)),\n        this.offsetChanged$.pipe(\n          takeUntil(this.destroy$),\n          map(() => ({}))\n        )\n      )\n        .pipe(auditTime(NZ_AFFIX_DEFAULT_SCROLL_TIME))\n        .subscribe(e => this.updatePosition(e as Event));\n    });\n    this.timeout = setTimeout(() => this.updatePosition({} as Event));\n  }\n\n  private removeListeners(): void {\n    clearTimeout(this.timeout);\n    this.positionChangeSubscription.unsubscribe();\n    this.destroy$.next();\n    this.destroy$.complete();\n  }\n\n  getOffset(element: Element, target: Element | Window | undefined): SimpleRect {\n    const elemRect = element.getBoundingClientRect();\n    const targetRect = getTargetRect(target!);\n\n    const scrollTop = this.scrollSrv.getScroll(target, true);\n    const scrollLeft = this.scrollSrv.getScroll(target, false);\n\n    const docElem = this.document.body;\n    const clientTop = docElem.clientTop || 0;\n    const clientLeft = docElem.clientLeft || 0;\n\n    return {\n      top: elemRect.top - targetRect.top + scrollTop - clientTop,\n      left: elemRect.left - targetRect.left + scrollLeft - clientLeft,\n      width: elemRect.width,\n      height: elemRect.height\n    };\n  }\n\n  private setAffixStyle(e: Event, affixStyle?: NgStyleInterface): void {\n    const originalAffixStyle = this.affixStyle;\n    const isWindow = this.target === window;\n    if (e.type === 'scroll' && originalAffixStyle && affixStyle && isWindow) {\n      return;\n    }\n    if (shallowEqual(originalAffixStyle, affixStyle)) {\n      return;\n    }\n\n    const fixed = !!affixStyle;\n    const wrapEl = this.fixedEl.nativeElement;\n    this.renderer.setStyle(wrapEl, 'cssText', getStyleAsText(affixStyle));\n    this.affixStyle = affixStyle;\n    if (fixed) {\n      wrapEl.classList.add(NZ_AFFIX_CLS_PREFIX);\n    } else {\n      wrapEl.classList.remove(NZ_AFFIX_CLS_PREFIX);\n    }\n\n    if ((affixStyle && !originalAffixStyle) || (!affixStyle && originalAffixStyle)) {\n      this.nzChange.emit(fixed);\n    }\n  }\n\n  private setPlaceholderStyle(placeholderStyle?: NgStyleInterface): void {\n    const originalPlaceholderStyle = this.placeholderStyle;\n    if (shallowEqual(placeholderStyle, originalPlaceholderStyle)) {\n      return;\n    }\n    this.renderer.setStyle(this.placeholderNode, 'cssText', getStyleAsText(placeholderStyle));\n    this.placeholderStyle = placeholderStyle;\n  }\n\n  private syncPlaceholderStyle(e: Event): void {\n    if (!this.affixStyle) {\n      return;\n    }\n    this.renderer.setStyle(this.placeholderNode, 'cssText', '');\n    this.placeholderStyle = undefined;\n    const styleObj = {\n      width: this.placeholderNode.offsetWidth,\n      height: this.fixedEl.nativeElement.offsetHeight\n    };\n    this.setAffixStyle(e, {\n      ...this.affixStyle,\n      ...styleObj\n    });\n    this.setPlaceholderStyle(styleObj);\n  }\n\n  updatePosition(e: Event): void {\n    if (!this.platform.isBrowser) {\n      return;\n    }\n\n    const targetNode = this.target;\n    let offsetTop = this.nzOffsetTop;\n    const scrollTop = this.scrollSrv.getScroll(targetNode, true);\n    const elemOffset = this.getOffset(this.placeholderNode, targetNode!);\n    const fixedNode = this.fixedEl.nativeElement;\n    const elemSize = {\n      width: fixedNode.offsetWidth,\n      height: fixedNode.offsetHeight\n    };\n    const offsetMode = {\n      top: false,\n      bottom: false\n    };\n    // Default to `offsetTop=0`.\n    if (typeof offsetTop !== 'number' && typeof this.nzOffsetBottom !== 'number') {\n      offsetMode.top = true;\n      offsetTop = 0;\n    } else {\n      offsetMode.top = typeof offsetTop === 'number';\n      offsetMode.bottom = typeof this.nzOffsetBottom === 'number';\n    }\n    const targetRect = getTargetRect(targetNode as Window);\n    const targetInnerHeight = (targetNode as Window).innerHeight || (targetNode as HTMLElement).clientHeight;\n    if (scrollTop >= elemOffset.top - (offsetTop as number) && offsetMode.top) {\n      const width = elemOffset.width;\n      const top = targetRect.top + (offsetTop as number);\n      this.setAffixStyle(e, {\n        position: 'fixed',\n        top,\n        left: targetRect.left + elemOffset.left,\n        width\n      });\n      this.setPlaceholderStyle({\n        width,\n        height: elemSize.height\n      });\n    } else if (scrollTop <= elemOffset.top + elemSize.height + (this.nzOffsetBottom as number) - targetInnerHeight && offsetMode.bottom) {\n      const targetBottomOffset = targetNode === window ? 0 : window.innerHeight - targetRect.bottom!;\n      const width = elemOffset.width;\n      this.setAffixStyle(e, {\n        position: 'fixed',\n        bottom: targetBottomOffset + (this.nzOffsetBottom as number),\n        left: targetRect.left + elemOffset.left,\n        width\n      });\n      this.setPlaceholderStyle({\n        width,\n        height: elemOffset.height\n      });\n    } else {\n      if (\n        e.type === AffixRespondEvents.resize &&\n        this.affixStyle &&\n        this.affixStyle.position === 'fixed' &&\n        this.placeholderNode.offsetWidth\n      ) {\n        this.setAffixStyle(e, {\n          ...this.affixStyle,\n          width: this.placeholderNode.offsetWidth\n        });\n      } else {\n        this.setAffixStyle(e);\n      }\n      this.setPlaceholderStyle();\n    }\n\n    if (e.type === 'resize') {\n      this.syncPlaceholderStyle(e);\n    }\n  }\n}\n"]}