From 1b05850988d1c596b37b23deca4f5ac9149cda53 Mon Sep 17 00:00:00 2001
From: levensta <grbchv.s@gmail.com>
Date: Fri, 26 Jun 2026 04:13:45 +0300
Subject: [PATCH] preverse last non apple interchange br

---
 .../lexical-html/src/import/coreImportRules.ts     |  4 +++-
 .../__tests__/unit/LexicalEventHelpers.test.tsx    |  4 ++--
 packages/lexical/src/index.ts                      |  1 +
 packages/lexical/src/nodes/LexicalLineBreakNode.ts | 14 +++++++++++++-
 4 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/packages/lexical-html/src/import/coreImportRules.ts b/packages/lexical-html/src/import/coreImportRules.ts
index 87c4adc6c65..6b6f8b5a2de 100644
--- a/packages/lexical-html/src/import/coreImportRules.ts
+++ b/packages/lexical-html/src/import/coreImportRules.ts
@@ -27,6 +27,7 @@ import {
   IS_SUBSCRIPT,
   IS_SUPERSCRIPT,
   IS_UNDERLINE,
+  isAppleInterchangeNewline,
   isBlockDomNode,
   isDOMTextNode,
   isLastChildInBlockNode,
@@ -453,7 +454,8 @@ const LineBreakRule = /* @__PURE__ */ defineImportRule({
   // would otherwise survive as a LineBreakNode and tack an extra blank
   // line onto the imported content.
   $import: (_ctx, el) =>
-    isOnlyChildInBlockNode(el) || isLastChildInBlockNode(el)
+    isOnlyChildInBlockNode(el) ||
+    (isAppleInterchangeNewline(el) && isLastChildInBlockNode(el))
       ? []
       : [$createLineBreakNode()],
   match: sel.tag('br'),
diff --git a/packages/lexical-utils/src/__tests__/unit/LexicalEventHelpers.test.tsx b/packages/lexical-utils/src/__tests__/unit/LexicalEventHelpers.test.tsx
index 4ba20a998a0..56693485852 100644
--- a/packages/lexical-utils/src/__tests__/unit/LexicalEventHelpers.test.tsx
+++ b/packages/lexical-utils/src/__tests__/unit/LexicalEventHelpers.test.tsx
@@ -737,9 +737,9 @@ describe('LexicalEventHelpers', () => {
         },
         {
           expectedHTML:
-            '<p class="editor-paragraph" dir="auto"><span data-lexical-text="true">1</span></p><p class="editor-paragraph" dir="auto"><span data-lexical-text="true">2</span></p><p class="editor-paragraph" dir="auto"><span data-lexical-text="true">3</span></p>',
+            '<p class="editor-paragraph" dir="auto"><span data-lexical-text="true">1</span></p><p class="editor-paragraph" dir="auto"><span data-lexical-text="true">2</span><br><br data-lexical-managed-linebreak="true"></p><p class="editor-paragraph" dir="auto"><span data-lexical-text="true">3</span></p>',
           inputs: [pasteHTML('1<p>2<br /></p>3')],
-          name: 'last br in a block node is ignored',
+          name: 'last br in a block node is preserved',
         },
       ];
 
diff --git a/packages/lexical/src/index.ts b/packages/lexical/src/index.ts
index 282400a275e..7b87a99202f 100644
--- a/packages/lexical/src/index.ts
+++ b/packages/lexical/src/index.ts
@@ -386,6 +386,7 @@ export type {SerializedLineBreakNode} from './nodes/LexicalLineBreakNode';
 export {
   $createLineBreakNode,
   $isLineBreakNode,
+  isAppleInterchangeNewline,
   isLastChildInBlockNode,
   isOnlyChildInBlockNode,
   LineBreakNode,
diff --git a/packages/lexical/src/nodes/LexicalLineBreakNode.ts b/packages/lexical/src/nodes/LexicalLineBreakNode.ts
index 376ae273ad7..3e90e83dfc5 100644
--- a/packages/lexical/src/nodes/LexicalLineBreakNode.ts
+++ b/packages/lexical/src/nodes/LexicalLineBreakNode.ts
@@ -19,6 +19,7 @@ import {
   $applyNodeReplacement,
   isBlockDomNode,
   isDOMTextNode,
+  isHTMLElement,
 } from '../LexicalUtils';
 
 export type SerializedLineBreakNode = SerializedLexicalNode;
@@ -58,7 +59,10 @@ export class LineBreakNode extends LexicalNode {
   static importDOM(): DOMConversionMap | null {
     return {
       br: (node: Node) => {
-        if (isOnlyChildInBlockNode(node) || isLastChildInBlockNode(node)) {
+        if (
+          isOnlyChildInBlockNode(node) ||
+          (isAppleInterchangeNewline(node) && isLastChildInBlockNode(node))
+        ) {
           return null;
         }
         return {
@@ -151,6 +155,14 @@ export function isLastChildInBlockNode(node: Node): boolean {
   return false;
 }
 
+export function isAppleInterchangeNewline(node: Node): boolean {
+  return (
+    node.nodeName === 'BR' &&
+    isHTMLElement(node) &&
+    node.getAttribute('class') === 'Apple-interchange-newline'
+  );
+}
+
 function isWhitespaceDomTextNode(node: Node): boolean {
   return isDOMTextNode(node) && /^( |\t|\r?\n)+$/.test(node.textContent || '');
 }