From 3b9ac9f411f6e8f646dcebc18cc01470cf98c8e4 Mon Sep 17 00:00:00 2001
From: Andriy Trubchanin <magtuxgit@gmail.com>
Date: Mon, 29 Nov 2021 17:20:55 +0200
Subject: [PATCH] fix attributes compare

---
 lib/src/models/quill_delta.dart | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/src/models/quill_delta.dart b/lib/src/models/quill_delta.dart
index 47bbde2a..e4a11055 100644
--- a/lib/src/models/quill_delta.dart
+++ b/lib/src/models/quill_delta.dart
@@ -150,6 +150,11 @@ class Operation {
 
   /// Returns `true` if [other] operation has the same attributes as this one.
   bool hasSameAttributes(Operation other) {
+    // treat null and empty equal
+    if ((_attributes?.isEmpty ?? true) &&
+        (other._attributes?.isEmpty ?? true)) {
+      return true;
+    }
     return _attributeEquality.equals(_attributes, other._attributes);
   }