From 73552160347870446dcee46a620ccc753089e6e7 Mon Sep 17 00:00:00 2001
From: Ehsan Rezaei <ehsan.rezaei@hyland.com>
Date: Wed, 31 May 2023 13:12:09 +0200
Subject: [PATCH] [AAE-14759] Fixed image viewer when going to full screen mode
 (#8609)

---
 .../viewer/components/img-viewer.component.spec.ts    | 11 +++++++++++
 .../src/lib/viewer/components/img-viewer.component.ts |  7 +++++++
 2 files changed, 18 insertions(+)

diff --git a/lib/core/src/lib/viewer/components/img-viewer.component.spec.ts b/lib/core/src/lib/viewer/components/img-viewer.component.spec.ts
index 55e72d0521..fe897a48c9 100644
--- a/lib/core/src/lib/viewer/components/img-viewer.component.spec.ts
+++ b/lib/core/src/lib/viewer/components/img-viewer.component.spec.ts
@@ -369,6 +369,17 @@ describe('Test Img viewer component ', () => {
             expect(component.isSaving.emit).toHaveBeenCalledWith(true);
             expect(component.isSaving.emit).toHaveBeenCalledWith(false);
         }));
+
+        it('should reset the viewer after going to full screen mode', () => {
+            Object.defineProperty(document, 'fullscreenElement', {
+                value: true
+            });
+            spyOn(component, 'reset');
+
+            document.dispatchEvent(new Event('fullscreenchange'));
+
+            expect(component.reset).toHaveBeenCalled();
+        });
     });
 
 });
diff --git a/lib/core/src/lib/viewer/components/img-viewer.component.ts b/lib/core/src/lib/viewer/components/img-viewer.component.ts
index f5d15f0b71..3ca3aabf69 100644
--- a/lib/core/src/lib/viewer/components/img-viewer.component.ts
+++ b/lib/core/src/lib/viewer/components/img-viewer.component.ts
@@ -141,6 +141,13 @@ export class ImgViewerComponent implements AfterViewInit, OnChanges, OnDestroy {
         }
     }
 
+    @HostListener('document:fullscreenchange')
+    fullScreenChangeHandler() {
+        if(document.fullscreenElement) {
+            this.reset();
+        }
+    }
+
     ngOnChanges(changes: SimpleChanges) {
         const blobFile = changes['blobFile'];
         if (blobFile && blobFile.currentValue) {