From fa16556af109798c0b5d9e53727c239d4730b24e Mon Sep 17 00:00:00 2001
From: Armin Schrenk <armin.schrenk@skymatic.de>
Date: Mon, 2 Dec 2024 10:34:40 +0100
Subject: [PATCH] do not allow empty display name for vault

Fixes #3633
---
 .../ui/vaultoptions/GeneralVaultOptionsController.java     | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/cryptomator/ui/vaultoptions/GeneralVaultOptionsController.java b/src/main/java/org/cryptomator/ui/vaultoptions/GeneralVaultOptionsController.java
index 59a52adf2..5fe6746d7 100644
--- a/src/main/java/org/cryptomator/ui/vaultoptions/GeneralVaultOptionsController.java
+++ b/src/main/java/org/cryptomator/ui/vaultoptions/GeneralVaultOptionsController.java
@@ -57,9 +57,14 @@ public class GeneralVaultOptionsController implements FxController {
 	}
 
 	private void trimVaultNameOnFocusLoss(Observable observable, Boolean wasFocussed, Boolean isFocussed) {
+		var displayNameSetting = vault.getVaultSettings().displayName;
 		if (!isFocussed) {
 			var trimmed = vaultName.getText().trim();
-			vault.getVaultSettings().displayName.set(trimmed);
+			if (!trimmed.isEmpty()) {
+				displayNameSetting.set(trimmed); //persist changes
+			} else {
+				vaultName.setText(displayNameSetting.get()); //revert changes
+			}
 		}
 	}