From 57c2b8a28b96a387abef589472c58a48889ed59e Mon Sep 17 00:00:00 2001
From: David Lechner <david@pybricks.com>
Date: Thu, 18 May 2023 16:54:29 -0500
Subject: [PATCH] editor: add undo stop when switching model

Since we share the same editor instance with multiple models, we need
to ensure undo stack consistency when changing the model, otherwise
we can lose some history, e.g. if a not active model is modified.
---
 src/editor/sagas.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/editor/sagas.ts b/src/editor/sagas.ts
index 52ffb39b..b74c3676 100644
--- a/src/editor/sagas.ts
+++ b/src/editor/sagas.ts
@@ -265,8 +265,10 @@ function* handleEditorActivateFile(
             );
         }
 
+        editor.pushUndoStop();
         editor.setModel(file.model);
         editor.restoreViewState(file.viewState);
+        editor.pushUndoStop();
         activeFileHistory.push(action.uuid);
 
         editor.focus();