disable zooming for single shared file

Signed-off-by: Vanessa Pertsch <vanessa.pertsch@nextcloud.com>

Author: vanpertsch

js/viewer-main.js

@@ -153,7 +153,12 @@ export default {
 			this.disableSwipe()
 			this.shiftX = this.shiftX + Math.round(-scrollPercX * growX)
 			this.shiftY = this.shiftY + Math.round(-scrollPercY * growY)
-			this.zoomRatio = newZoomRatio
+
+			// only change zoomRatio when multiple files are in the list. Disable for singleshared files
+			if (this.fileList.length > 1) {
+				this.zoomRatio = newZoomRatio
+				window.console.log('test')
+			}
 		},
 
 		resetZoom() {