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feat(card-list): replace resize observer with CSS (#262)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,73 +1,16 @@ | ||
| import { | ||
| AfterViewInit, | ||
| ChangeDetectorRef, | ||
| Component, | ||
| ElementRef, | ||
| EventEmitter, | ||
| Input, | ||
| OnDestroy, | ||
| Output, | ||
| ViewChild, | ||
| } from '@angular/core'; | ||
| import { Component, EventEmitter, Input, Output } from '@angular/core'; | ||
| import { CardItem, ClickableCardComponent } from '../clickable-card/clickable-card.component'; | ||
| import { NgClass } from '@angular/common'; | ||
|
|
||
| const CARD_WIDTH = 128; | ||
| const GAB_WIDTH = 24; | ||
|
|
||
| @Component({ | ||
| selector: 'app-card-list', | ||
| templateUrl: './card-list.component.html', | ||
| standalone: true, | ||
| imports: [NgClass, ClickableCardComponent], | ||
| imports: [ClickableCardComponent], | ||
| }) | ||
| export class CardListComponent implements AfterViewInit, OnDestroy { | ||
| export class CardListComponent { | ||
| @Input({ required: true }) items!: CardItem[] | null; | ||
|
|
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| @Input() overflow: 'wrap' | 'scroll' = 'wrap'; | ||
|
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| @Output() itemClick = new EventEmitter<CardItem>(); | ||
|
|
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| @ViewChild('container') containerElement!: ElementRef<HTMLElement>; | ||
|
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| maxItemsForOneLine = 3; | ||
| skeletonItems = Array(this.maxItemsForOneLine) | ||
| .fill(0) | ||
| .map((_, i) => i); | ||
| gridColsClass = 'grid-cols-3'; | ||
|
|
||
| private resizeObserver: ResizeObserver; | ||
|
|
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| constructor(private cdr: ChangeDetectorRef) { | ||
| this.resizeObserver = new ResizeObserver(this.onResize); | ||
| } | ||
|
|
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| ngAfterViewInit(): void { | ||
| this.resizeObserver.observe(this.containerElement.nativeElement); | ||
| } | ||
|
|
||
| ngOnDestroy(): void { | ||
| this.resizeObserver.disconnect(); | ||
| } | ||
|
|
||
| private onResize: ResizeObserverCallback = ([entry]) => { | ||
| if (this.overflow === 'scroll') { | ||
| return; | ||
| } | ||
|
|
||
| const oldMaxItemsForOneLine = this.maxItemsForOneLine; | ||
| this.maxItemsForOneLine = Math.max( | ||
| 2, | ||
| Math.floor((entry.contentBoxSize[0].inlineSize + GAB_WIDTH) / (CARD_WIDTH + GAB_WIDTH)), | ||
| ); | ||
| this.gridColsClass = `grid-cols-${this.maxItemsForOneLine}`; | ||
| this.skeletonItems = Array(this.maxItemsForOneLine) | ||
| .fill(0) | ||
| .map((_, i) => i); | ||
|
|
||
| // ResizeObserver does not run in Angular Zone, so trigger change detection if value has changed | ||
| if (oldMaxItemsForOneLine !== this.maxItemsForOneLine) { | ||
| this.cdr.detectChanges(); | ||
| } | ||
| }; | ||
| } |
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