From 85f7ac45614f9d7c65672f70984ab232f2039da3 Mon Sep 17 00:00:00 2001
From: Artur Arseniev <artur.catch@hotmail.it>
Date: Sat, 20 Mar 2021 00:20:24 +0100
Subject: [PATCH] Track frames in UndoManager

---
 src/pages/model/Page.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/pages/model/Page.js b/src/pages/model/Page.js
index 54f2dcbaf..05bb753dd 100644
--- a/src/pages/model/Page.js
+++ b/src/pages/model/Page.js
@@ -8,7 +8,13 @@ export default Model.extend({
   }),
 
   initialize(props, opts = {}) {
-    this.set('frames', new Frames(this.get('frames'), opts.config));
+    const { config = {} } = opts;
+    const { em } = config;
+    this.em = em;
+    const frames = new Frames(this.get('frames'), config);
+    this.set('frames', frames);
+    const um = em && em.get('UndoManager');
+    um && um.add(frames);
   },
 
   getFrames() {