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73 changes: 37 additions & 36 deletions
73
frontend/src/app/components/masonry/masonry-item.directive.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,52 +1,53 @@ | ||
| import { Directive, ElementRef, Inject } from '@angular/core'; | ||
| import { | ||
| ResizeObserverService, | ||
| WA_RESIZE_OPTION_BOX | ||
| } from '@ng-web-apis/resize-observer'; | ||
| import { AutoUnsubscribe } from 'ngx-auto-unsubscribe-decorator'; | ||
| import { Observable, map } from 'rxjs'; | ||
| import { Directive, TemplateRef, ViewRef } from '@angular/core'; | ||
| import { BehaviorSubject } from 'rxjs'; | ||
|
|
||
| @Directive({ | ||
| selector: '[masonry-item]', | ||
| providers: [ | ||
| ResizeObserverService, | ||
| { | ||
| provide: WA_RESIZE_OPTION_BOX, | ||
| deps: [ElementRef], | ||
| useValue: "border-box", | ||
| }, | ||
| ], | ||
| selector: 'ng-template[masonry-item]', | ||
| }) | ||
| export class MasonryItemDirective { | ||
| private lastEntry: ResizeObserverEntry | null = null; | ||
| private viewRef: ViewRef | null = null; | ||
| private resizeObserver: ResizeObserver | null = null; | ||
| private sizeSubject: BehaviorSubject<{ width: number; height: number }> = | ||
| new BehaviorSubject({ width: 0, height: 0 }); | ||
|
|
||
| private resizeObserver: Observable<ResizeObserverEntry>; | ||
| constructor(private template: TemplateRef<HTMLElement>) {} | ||
|
|
||
| constructor( | ||
| private element: ElementRef<HTMLElement>, | ||
| @Inject(ResizeObserverService) | ||
| resize: Observable<ResizeObserverEntry[]>, | ||
| ) { | ||
| this.resizeObserver = resize.pipe(map((entries) => entries[0])); | ||
| this.subscribeResize(); | ||
| public getTemplate(): TemplateRef<HTMLElement> { | ||
| return this.template; | ||
| } | ||
|
|
||
| @AutoUnsubscribe() | ||
| private subscribeResize() { | ||
| return this.resizeObserver.subscribe((value) => { | ||
| this.lastEntry = value; | ||
| }); | ||
| public getViewRef(): ViewRef { | ||
| if (!this.viewRef || this.viewRef.destroyed) { | ||
| this.viewRef = this.template.createEmbeddedView(null as any); | ||
| this.resubscribeResizeObserver(); | ||
| } | ||
| return this.viewRef; | ||
| } | ||
|
|
||
| public getElement() { | ||
| return this.element.nativeElement; | ||
| public getElement(): HTMLElement | null { | ||
| const anyRef = this.getViewRef() as any; | ||
| return anyRef.rootNodes.length > 0 ? anyRef.rootNodes[0] : null; | ||
| } | ||
|
|
||
| public getSize() { | ||
| return this.resizeObserver; | ||
| public getSizeObservable() { | ||
| return this.sizeSubject.asObservable(); | ||
| } | ||
|
|
||
| public getLastSize() { | ||
| return this.lastEntry; | ||
| public getCurrentSize() { | ||
| return this.sizeSubject.value; | ||
| } | ||
|
|
||
| public resubscribeResizeObserver() { | ||
| if (this.resizeObserver) { | ||
| this.resizeObserver.disconnect(); | ||
| } | ||
| const element = this.getElement(); | ||
| if (element) { | ||
| this.resizeObserver = new ResizeObserver((items) => { | ||
| const { width, height } = items[0].contentRect; | ||
| this.sizeSubject.next({ width, height }); | ||
| }); | ||
| this.resizeObserver.observe(element); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,6 @@ | ||
| <!-- <ng-content></ng-content> --> | ||
| <div | ||
| #column | ||
| class="column" | ||
| *ngFor="let item of [].constructor(_column_count); let i = index" | ||
| ></div> | ||
| > | ||
| <ng-container #column></ng-container> | ||
| </div> |
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