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...src/app/components/shared/app-common/content-aware-image/content-aware-image.component.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,106 +1,122 @@ | ||
| import { | ||
| ChangeDetectionStrategy, | ||
| ChangeDetectorRef, | ||
| Component, | ||
| DoCheck, | ||
| ElementRef, | ||
| EventEmitter, | ||
| Input, | ||
| OnDestroy, | ||
| OnInit, | ||
| Output, | ||
| ViewChild | ||
| ChangeDetectionStrategy, | ||
| ChangeDetectorRef, | ||
| Component, | ||
| DoCheck, | ||
| ElementRef, | ||
| EventEmitter, | ||
| Input, | ||
| OnDestroy, | ||
| OnInit, | ||
| Output, | ||
| ViewChild, | ||
| } from "@angular/core"; | ||
| import {SafeResourceUrl} from "@angular/platform-browser"; | ||
| import { SafeResourceUrl } from "@angular/platform-browser"; | ||
|
|
||
| @Component({ | ||
| selector: "app-content-aware-image", | ||
| templateUrl: "./content-aware-image.component.html", | ||
| styleUrls: ["./content-aware-image.component.scss"], | ||
| changeDetection: ChangeDetectionStrategy.OnPush, | ||
| selector: "app-content-aware-image", | ||
| templateUrl: "./content-aware-image.component.html", | ||
| styleUrls: ["./content-aware-image.component.scss"], | ||
| changeDetection: ChangeDetectionStrategy.OnPush, | ||
| }) | ||
| export class ContentAwareImageComponent implements OnInit, DoCheck, OnDestroy { | ||
| @Input() imageSrc!: string | SafeResourceUrl; | ||
| @Input() maximizeHeight: boolean = true; | ||
| @Input() maximizeWidth: boolean = true; | ||
| @Input() borderRadius: string | undefined; | ||
| @Input() decoding: "async" | "sync" | "auto" = "auto"; | ||
| @Input() maxRetry = 3; | ||
| @Input() retryDelay = 200; | ||
| @ViewChild("image") imageElement?: ElementRef<HTMLImageElement>; | ||
| @ViewChild("imageContainer") imageContainer?: ElementRef<HTMLDivElement>; | ||
| @Output() appLoadEnd = new EventEmitter<void>(); | ||
| @Output() appLoadError = new EventEmitter<void>(); | ||
| @Input() imageSrc!: string | SafeResourceUrl; | ||
| @Input() maximizeHeight: boolean = true; | ||
| @Input() maximizeWidth: boolean = true; | ||
| @Input() borderRadius: string | undefined; | ||
| @Input() decoding: "async" | "sync" | "auto" = "auto"; | ||
| @Input() maxRetry = 3; | ||
| @Input() retryDelay = 200; | ||
| @ViewChild("image") imageElement?: ElementRef<HTMLImageElement>; | ||
| @ViewChild("imageContainer") imageContainer?: ElementRef<HTMLDivElement>; | ||
| @Output() appLoadEnd = new EventEmitter<void>(); | ||
| @Output() appLoadError = new EventEmitter<void>(); | ||
|
|
||
| scaleWidth = false; | ||
| private previousHeight = 0; | ||
| private previousWidth = 0; | ||
| private retryCount = 0; | ||
| private readonly checkInterval?: number; | ||
| scaleWidth = false; | ||
| private previousHeight = 0; | ||
| private previousWidth = 0; | ||
| private retryCount = 0; | ||
| private readonly checkInterval?: number; | ||
|
|
||
| constructor(private changeDetector: ChangeDetectorRef) { | ||
| this.checkInterval = setInterval(() => this.checkSize(), 1000); | ||
| } | ||
| constructor(private changeDetector: ChangeDetectorRef) { | ||
| this.checkInterval = setInterval(() => this.checkSize(), 1000); | ||
| } | ||
|
|
||
| public ngOnInit(): void { | ||
| if (this.imageElement) { | ||
| this.imageElement.nativeElement.decoding = this.decoding; | ||
| this.changeDetector.detach(); | ||
| } | ||
| } | ||
| public ngOnInit(): void { | ||
| if (this.imageElement) { | ||
| this.imageElement.nativeElement.decoding = this.decoding; | ||
| this.changeDetector.detach(); | ||
| } | ||
| } | ||
|
|
||
| public ngOnDestroy(): void { | ||
| clearInterval(this.checkInterval); | ||
| } | ||
| public ngOnDestroy(): void { | ||
| clearInterval(this.checkInterval); | ||
| } | ||
|
|
||
| public ngDoCheck(): void { | ||
| this.checkSize(); | ||
| } | ||
| public ngDoCheck(): void { | ||
| this.checkSize(); | ||
| } | ||
|
|
||
| public checkSize(): void { | ||
| if (this.imageElement?.nativeElement && this.imageContainer?.nativeElement) { | ||
| this.adjustSize(this.imageElement.nativeElement, this.imageContainer.nativeElement); | ||
| } | ||
| } | ||
| public checkSize(): void { | ||
| if ( | ||
| this.imageElement?.nativeElement && | ||
| this.imageContainer?.nativeElement | ||
| ) { | ||
| this.adjustSize( | ||
| this.imageElement.nativeElement, | ||
| this.imageContainer.nativeElement, | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| public onImageLoad(image: HTMLImageElement, imageContainer: HTMLDivElement): void { | ||
| this.adjustSize(image, imageContainer); | ||
| this.appLoadEnd.emit(); | ||
| } | ||
| public onImageLoad( | ||
| image: HTMLImageElement, | ||
| imageContainer: HTMLDivElement, | ||
| ): void { | ||
| this.adjustSize(image, imageContainer); | ||
| this.appLoadEnd.emit(); | ||
| } | ||
|
|
||
| /** | ||
| * Fits the image into the container | ||
| * @param {HTMLImageElement} image | ||
| * @param {HTMLDivElement} imageContainer | ||
| */ | ||
| public adjustSize(image: HTMLImageElement, imageContainer: HTMLDivElement): void { | ||
| const containerHeight = Math.abs(imageContainer.clientHeight); | ||
| const containerWidth = Math.abs(imageContainer.clientWidth); | ||
| /** | ||
| * Fits the image into the container | ||
| * @param {HTMLImageElement} image | ||
| * @param {HTMLDivElement} imageContainer | ||
| */ | ||
| public adjustSize( | ||
| image: HTMLImageElement, | ||
| imageContainer: HTMLDivElement, | ||
| ): void { | ||
| const containerHeight = Math.abs(imageContainer.clientHeight); | ||
| const containerWidth = Math.abs(imageContainer.clientWidth); | ||
|
|
||
| if (this.previousWidth != containerWidth || this.previousHeight != containerHeight) { | ||
| this.previousHeight = containerHeight; | ||
| this.previousWidth = containerWidth; | ||
| const imageRelativeHeight = image.naturalHeight / containerHeight; | ||
| const imageRelativeWidth = image.naturalWidth / containerWidth; | ||
| const scaleWidth = imageRelativeWidth > imageRelativeHeight; | ||
| if ( | ||
| this.previousWidth !== containerWidth || | ||
| this.previousHeight !== containerHeight | ||
| ) { | ||
| this.previousHeight = containerHeight; | ||
| this.previousWidth = containerWidth; | ||
| const imageRelativeHeight = image.naturalHeight / containerHeight; | ||
| const imageRelativeWidth = image.naturalWidth / containerWidth; | ||
| const scaleWidth = imageRelativeWidth > imageRelativeHeight; | ||
|
|
||
| if (scaleWidth != this.scaleWidth) { | ||
| this.scaleWidth = scaleWidth; | ||
| this.changeDetector.detectChanges(); | ||
| } | ||
| } | ||
| } | ||
| if (scaleWidth !== this.scaleWidth) { | ||
| this.scaleWidth = scaleWidth; | ||
| this.changeDetector.detectChanges(); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| public onImageLoadError(error: ErrorEvent, image: HTMLImageElement): void { | ||
| const imageSrc = image.src; | ||
| public onImageLoadError(error: ErrorEvent, image: HTMLImageElement): void { | ||
| const imageSrc = image.src; | ||
|
|
||
| if (this.retryCount < this.maxRetry) { | ||
| this.retryCount++; | ||
| setTimeout(() => { | ||
| image.src = imageSrc; | ||
| }, this.retryDelay * this.retryCount); | ||
| } else { | ||
| this.appLoadError.emit(); | ||
| } | ||
| } | ||
| if (this.retryCount < this.maxRetry) { | ||
| this.retryCount++; | ||
| image.src = ""; | ||
| setTimeout(() => { | ||
| image.src = imageSrc; | ||
| }, this.retryDelay * this.retryCount); | ||
| } else { | ||
| this.appLoadError.emit(); | ||
| } | ||
| } | ||
| } |