stack&tile: don't allow stacking a window onto itself

Change-Id: Iefd4a49b5b4caf2c3cd478a77fe4673dcac40427 Reviewed-on: https://review.haiku-os.org/c/haiku/+/5056 Tested-by: Commit checker robot <[email protected]> Reviewed-by: Adrien Destugues <[email protected]>
2022-04-01 09:39:23 +00:00
parent a12cf089ee
commit 83cb10bcbc
1 changed files with 8 additions and 0 deletions
@@ -69,6 +69,14 @@ StackingEventHandler::HandleMessage(SATWindow* sender,
 			SATWindow* candidate = stackAndTile->GetSATWindow(window);
 			if (!candidate)
 				return false;
+
+			// Is that window already part of the stack?
+			if (area->WindowList().HasItem(candidate)) {
+				reply.StartMessage(B_MISMATCHED_VALUES);
+				reply.Flush();
+				break;
+			}
+
 			if (!parent->StackWindow(candidate))
 				return false;