Revert "Fix loading indicator"

This reverts commit 014c24b8cf70c2e99d4efd6a619e258629ac90c5.

src-ui/src/app/components/document-detail/document-detail.component.html

@@ -240,7 +240,7 @@
 </div>
 
 <ng-template #previewContent>
-    <div *ngIf="!metadata" class="w-100 h-100 d-flex align-items-center justify-content-center">
+    <div *ngIf="previewLoading" class="w-100 h-100 d-flex align-items-center justify-content-center">
         <div>
             <div class="spinner-border spinner-border-sm me-2" role="status"></div>
             <ng-container i18n>Loading...</ng-container>
@@ -255,6 +255,7 @@
                 [showBorders]="false"
                 [zoom]="previewZoomSetting"
                 (pagesLoaded)="onPagesLoaded($event)"
+                (pdfLoadingStarts)="onPdfLoadingStarts()"
                 (pdfLoadingFailed)="onPdfLoadingFailed($event)"
                 (beforePrint)="onBeforePrint()"
                 (afterPrint)="onAfterPrint()"

src-ui/src/app/components/document-detail/document-detail.component.ts

@@ -157,6 +157,7 @@ export class DocumentDetailComponent
   previewCurrentPage: number = 1
   previewNumPages: number = 1
   previewZoomSetting: ZoomSetting = ZoomSetting.Width
+  previewLoading: boolean = true
 
   printLoadingModal: NgbModalRef
 
@@ -450,6 +451,8 @@ export class DocumentDetailComponent
       .subscribe({
         next: (result) => {
           this.metadata = result
+          if (this.getContentType() !== 'application/pdf')
+            this.previewLoading = false
         },
         error: (error) => {
           this.metadata = null
@@ -771,6 +774,10 @@ export class DocumentDetailComponent
       })
   }
 
+  onPdfLoadingStarts() {
+    this.previewLoading = false
+  }
+
   onPagesLoaded(event: PagesLoadedEvent) {
     this.previewNumPages = event.pagesCount
   }