fix: bring back zoom on single open files

Zoom should only be disabled on single shared files.
See #1242 (review)

Signed-off-by: Max <max@nextcloud.com>

Author: max-nextcloud

js/viewer-main.js

@@ -62,6 +62,10 @@ export default {
 	},
 
 	props: {
+		canZoom: {
+			type: Boolean,
+			default: false,
+		},
 		editing: {
 			type: Boolean,
 			default: false,
@@ -144,6 +148,10 @@ export default {
 		 * @return {null}
 		 */
 		updateZoom(event) {
+			if (!this.canZoom) {
+				return
+			}
+
 			event.stopPropagation()
 			event.preventDefault()
 
@@ -172,11 +180,7 @@ export default {
 			this.disableSwipe()
 			this.shiftX = this.shiftX + Math.round(-scrollPercX * growX)
 			this.shiftY = this.shiftY + Math.round(-scrollPercY * growY)
-
-			// only change zoomRatio when multiple files are in the fileList. Disable for single shared files
-			if (this.fileList.length > 1) {
-				this.zoomRatio = newZoomRatio
-			}
+			this.zoomRatio = newZoomRatio
 		},
 
 		resetZoom() {

js/viewer-main.js.map

@@ -118,6 +118,7 @@
 				v-bind="currentFile"
 				:active="true"
 				:can-swipe.sync="canSwipe"
+				:can-zoom="canZoom"
 				:editing.sync="editing"
 				:file-list="fileList"
 				:is-full-screen="isFullscreen"
@@ -256,6 +257,9 @@ export default {
 		canLoop() {
 			return this.Viewer.canLoop
 		},
+		canZoom() {
+			return !this.Viewer.el
+		},
 		isStartOfList() {
 			return this.currentIndex === 0
 		},