From ea35725c85d97ceda9e9945e0d11960522bf7d02 Mon Sep 17 00:00:00 2001
From: Dariy Guzairov <0quokka0@gmail.com>
Date: Tue, 26 Sep 2023 09:21:17 +1000
Subject: [PATCH] Fix disable delete layer button when only one layer exists
 (fix #3649)

---
 src/app/commands/cmd_remove_layer.cpp | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/app/commands/cmd_remove_layer.cpp b/src/app/commands/cmd_remove_layer.cpp
index 782549ff5..2113d379b 100644
--- a/src/app/commands/cmd_remove_layer.cpp
+++ b/src/app/commands/cmd_remove_layer.cpp
@@ -116,9 +116,20 @@ RemoveLayerCommand::RemoveLayerCommand()
 
 bool RemoveLayerCommand::onEnabled(Context* context)
 {
-  return context->checkFlags(ContextFlags::ActiveDocumentIsWritable |
-                             ContextFlags::HasActiveSprite |
-                             ContextFlags::HasActiveLayer);
+  if (!context->checkFlags(ContextFlags::ActiveDocumentIsWritable |
+                           ContextFlags::HasActiveSprite |
+                           ContextFlags::HasActiveLayer))
+    return false;
+
+  const ContextReader reader(context);
+  const Sprite* sprite(reader.sprite());
+  const Layer* layer = reader.layer();
+
+  return sprite && layer &&
+    // We can remove all layers from non-root groups
+    ((layer->parent() != sprite->root()) ||
+     // Check that we are not removing the last layer in the sprite
+     (sprite->root()->layersCount() > 1));
 }
 
 void RemoveLayerCommand::onExecute(Context* context)