From ca9a13b1505589c8df104a78f2b6d8a36bb32ff4 Mon Sep 17 00:00:00 2001
From: Xin Yao <singerdmx@gmail.com>
Date: Fri, 23 Apr 2021 16:23:10 -0700
Subject: [PATCH] Update Line _format method

---
 lib/models/documents/nodes/line.dart | 7 +++++--
 lib/widgets/controller.dart          | 2 +-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/lib/models/documents/nodes/line.dart b/lib/models/documents/nodes/line.dart
index c34a8ed8..fabfad4d 100644
--- a/lib/models/documents/nodes/line.dart
+++ b/lib/models/documents/nodes/line.dart
@@ -1,5 +1,7 @@
 import 'dart:math' as math;
 
+import 'package:collection/collection.dart';
+
 import '../../quill_delta.dart';
 import '../attribute.dart';
 import '../style.dart';
@@ -203,10 +205,11 @@ class Line extends Container<Leaf?> {
     } // No block-level changes
 
     if (parent is Block) {
-      final parentStyle = (parent as Block).style.getBlockExceptHeader();
+      final parentStyle = (parent as Block).style.getBlocksExceptHeader();
       if (blockStyle.value == null) {
         _unwrap();
-      } else if (blockStyle != parentStyle) {
+      } else if (!const MapEquality()
+          .equals(newStyle.getBlocksExceptHeader(), parentStyle)) {
         _unwrap();
         _applyBlockStyles(newStyle);
       } // else the same style, no-op.
diff --git a/lib/widgets/controller.dart b/lib/widgets/controller.dart
index a0c2aa78..cb5136df 100644
--- a/lib/widgets/controller.dart
+++ b/lib/widgets/controller.dart
@@ -34,7 +34,7 @@ class QuillController extends ChangeNotifier {
 
   /// Controls whether this [QuillController] instance has already been disposed
   /// of
-  /// 
+  ///
   /// This is a safe approach to make sure that listeners don't crash when
   /// adding, removing or listeners to this instance.
   bool _isDisposed = false;