From 416768b9eb7dbb5e8773255e6a97a5ec11ab0ea4 Mon Sep 17 00:00:00 2001
From: Leonid Kuznetsov <leonidkuznetsov18@users.noreply.github.com>
Date: Mon, 31 Aug 2026 16:28:09 +0300
Subject: [PATCH] fix(super-editor): stop export from stripping tracked marks
 off the caller's tree
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The w:ins/w:del decoders removed the tracked-change mark from the node they
were handed by assigning the filtered marks array back onto it. That node
belongs to the caller: the body export starts from a fresh getUpdatedJson()
snapshot each time, but once a header/footer sub-editor is registered,
#exportProcessHeadersFooters serializes the converter's persistent
import-time tree (this.headers[id] / this.footers[id]) by reference. The
first exportDocx() therefore stripped trackInsert/trackDelete permanently,
and every later export wrote the header/footer redline as accepted plain
text — a counterparty's tracked deletion silently became regular content on
the second save, with no user edit involved.

Strip the mark on a shallow copy of the node instead, leaving the caller's
tree intact, so repeated exports with no intervening edit produce the same
tracked changes every time.

Fixes #3893

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 .../v3/handlers/w/del/del-translator.js       |   8 ++-
 .../v3/handlers/w/del/del-translator.test.js  |  33 ++++++++++
 .../v3/handlers/w/ins/ins-translator.js       |   8 ++-
 .../v3/handlers/w/ins/ins-translator.test.js  |  33 ++++++++++
 .../v1/tests/data/header-tracked-changes.docx | Bin 0 -> 16269 bytes
 .../headerTrackedChangesDoubleExport.test.js  |  62 ++++++++++++++++++
 6 files changed, 140 insertions(+), 4 deletions(-)
 create mode 100644 packages/super-editor/src/editors/v1/tests/data/header-tracked-changes.docx
 create mode 100644 packages/super-editor/src/editors/v1/tests/import-export/headerTrackedChangesDoubleExport.test.js

diff --git a/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/del/del-translator.js b/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/del/del-translator.js
index d2106b2539..4c29fd7888 100644
--- a/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/del/del-translator.js
+++ b/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/del/del-translator.js
@@ -88,9 +88,13 @@ function decode(params) {
     return /** @type {import('@translator').SCDecoderResult} */ (/** @type {unknown} */ (null));
   }
 
-  node.marks = marks.filter((m) => m.type !== 'trackDelete');
+  // Strip the tracked mark on a copy: `node` belongs to the caller, and the
+  // header/footer export path passes the converter's persistent import-time
+  // tree by reference. Mutating it here makes the strip permanent, so the
+  // second export loses the tracked change entirely (issue #3893).
+  const strippedNode = { ...node, marks: marks.filter((m) => m.type !== 'trackDelete') };
 
-  const translatedResult = exportSchemaToJson({ ...params, node });
+  const translatedResult = exportSchemaToJson({ ...params, node: strippedNode });
 
   if (params.isFinalDoc) {
     return null;
diff --git a/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/del/del-translator.test.js b/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/del/del-translator.test.js
index 0be0fe48ef..6895e83f74 100644
--- a/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/del/del-translator.test.js
+++ b/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/del/del-translator.test.js
@@ -235,6 +235,39 @@ describe('w:del translator', () => {
       expect(result.elements[0].elements[0].name).toBe('w:delText');
     });
 
+    it('strips the tracked mark on a copy without mutating the caller node (#3893)', () => {
+      // The header/footer export path hands decode the converter's persistent
+      // import-time tree by reference; an in-place strip makes the second
+      // export lose the tracked change entirely.
+      const mockTrackedMark = {
+        type: 'trackDelete',
+        attrs: {
+          id: '123',
+          sourceId: '',
+          author: 'Test',
+          authorEmail: 'test@example.com',
+          date: '2025-10-09T12:00:00Z',
+        },
+      };
+
+      exportSchemaToJson.mockReturnValue({ elements: [{ name: 'w:t', text: 'deleted text' }] });
+
+      const node = {
+        type: 'text',
+        text: 'deleted text',
+        marks: [mockTrackedMark, { type: 'bold' }],
+      };
+
+      config.decode({ node });
+
+      expect(node.marks).toEqual([mockTrackedMark, { type: 'bold' }]);
+      expect(exportSchemaToJson).toHaveBeenCalledWith(
+        expect.objectContaining({
+          node: expect.objectContaining({ marks: [{ type: 'bold' }] }),
+        }),
+      );
+    });
+
     it('renames every <w:t> in a multi-segment run to <w:delText> (newline split)', () => {
       const mockTrackedMark = {
         type: 'trackDelete',
diff --git a/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/ins/ins-translator.js b/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/ins/ins-translator.js
index 741dbc9c7d..bd7ab81eec 100644
--- a/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/ins/ins-translator.js
+++ b/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/ins/ins-translator.js
@@ -87,9 +87,13 @@ function decode(params) {
     return /** @type {import('@translator').SCDecoderResult} */ (/** @type {unknown} */ (null));
   }
 
-  node.marks = marks.filter((m) => m.type !== 'trackInsert');
+  // Strip the tracked mark on a copy: `node` belongs to the caller, and the
+  // header/footer export path passes the converter's persistent import-time
+  // tree by reference. Mutating it here makes the strip permanent, so the
+  // second export loses the tracked change entirely (issue #3893).
+  const strippedNode = { ...node, marks: marks.filter((m) => m.type !== 'trackInsert') };
 
-  const translatedTextNode = exportSchemaToJson({ ...params, node });
+  const translatedTextNode = exportSchemaToJson({ ...params, node: strippedNode });
 
   if (params.isFinalDoc) {
     return translatedTextNode;
diff --git a/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/ins/ins-translator.test.js b/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/ins/ins-translator.test.js
index e1ac8110ad..3d4295ceeb 100644
--- a/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/ins/ins-translator.test.js
+++ b/packages/super-editor/src/editors/v1/core/super-converter/v3/handlers/w/ins/ins-translator.test.js
@@ -253,6 +253,39 @@ describe('w:ins translator', () => {
       });
     });
 
+    it('strips the tracked mark on a copy without mutating the caller node (#3893)', () => {
+      // The header/footer export path hands decode the converter's persistent
+      // import-time tree by reference; an in-place strip makes the second
+      // export lose the tracked change entirely.
+      const mockTrackedMark = {
+        type: 'trackInsert',
+        attrs: {
+          id: '123',
+          sourceId: '',
+          author: 'Test',
+          authorEmail: 'test@example.com',
+          date: '2025-10-09T12:00:00Z',
+        },
+      };
+
+      exportSchemaToJson.mockReturnValue({ elements: [{ name: 'w:t' }] });
+
+      const node = {
+        type: 'text',
+        text: 'added text',
+        marks: [mockTrackedMark, { type: 'bold' }],
+      };
+
+      config.decode({ node });
+
+      expect(node.marks).toEqual([mockTrackedMark, { type: 'bold' }]);
+      expect(exportSchemaToJson).toHaveBeenCalledWith(
+        expect.objectContaining({
+          node: expect.objectContaining({ marks: [{ type: 'bold' }] }),
+        }),
+      );
+    });
+
     it('writes sourceId to w:id for round-trip fidelity', () => {
       const mockTrackedMark = {
         type: 'trackInsert',
diff --git a/packages/super-editor/src/editors/v1/tests/data/header-tracked-changes.docx b/packages/super-editor/src/editors/v1/tests/data/header-tracked-changes.docx
new file mode 100644
index 0000000000000000000000000000000000000000..aca116d57556c8b66a07ce46099bc880e944038d
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diff --git a/packages/super-editor/src/editors/v1/tests/import-export/headerTrackedChangesDoubleExport.test.js b/packages/super-editor/src/editors/v1/tests/import-export/headerTrackedChangesDoubleExport.test.js
new file mode 100644
index 0000000000..c345ef7f8c
--- /dev/null
+++ b/packages/super-editor/src/editors/v1/tests/import-export/headerTrackedChangesDoubleExport.test.js
@@ -0,0 +1,62 @@
+import { describe, it, expect } from 'vitest';
+import { loadTestDataForEditorTests, initTestEditor } from '../helpers/helpers.js';
+import DocxZipper from '@core/DocxZipper.js';
+import { parseXmlToJson } from '@converter/v2/docxHelper.js';
+
+const countTrackNodes = (node, tracker) => {
+  if (!node || typeof node !== 'object') return;
+  if (node.name === 'w:ins') tracker.ins += 1;
+  if (node.name === 'w:del') tracker.del += 1;
+  if (Array.isArray(node.elements)) node.elements.forEach((child) => countTrackNodes(child, tracker));
+};
+
+const loadExportedHeaderCensus = async (exportedBuffer) => {
+  const zipper = new DocxZipper();
+  const exportedFiles = await zipper.getDocxData(exportedBuffer, true);
+  const headerXmlEntry = exportedFiles.find((entry) => entry.name === 'word/header1.xml');
+  expect(headerXmlEntry).toBeDefined();
+
+  const headerJson = parseXmlToJson(headerXmlEntry.content);
+  const tracker = { ins: 0, del: 0 };
+  countTrackNodes(headerJson, tracker);
+  return tracker;
+};
+
+describe('header tracked changes across repeated exports (#3893)', () => {
+  // Once a header sub-editor is registered (the UI mounts one as soon as the
+  // user clicks into the header), #exportProcessHeadersFooters serializes the
+  // converter's persistent import-time header tree. The tracked-change decoders
+  // used to strip trackInsert/trackDelete marks off that tree in place, so the
+  // first export was correct and every later export silently dropped the
+  // header redline — a counterparty's tracked deletion came back as accepted
+  // plain text. Saving twice with no intervening edit must produce the same
+  // tracked changes both times.
+  it('preserves header w:ins/w:del on the second export once a header sub-editor is registered', async () => {
+    const fileName = 'header-tracked-changes.docx';
+    const { docx, media, mediaFiles, fonts } = await loadTestDataForEditorTests(fileName);
+    const { editor } = await initTestEditor({ content: docx, media, mediaFiles, fonts, isHeadless: true });
+    const { editor: headerSubEditor } = await initTestEditor({
+      content: docx,
+      media,
+      mediaFiles,
+      fonts,
+      isHeadless: true,
+    });
+
+    const headerIds = Object.keys(editor.converter.headers);
+    expect(headerIds.length).toBeGreaterThan(0);
+
+    // Register a sub-editor for every header part, the way
+    // HeaderFooterEditorManager does when a user clicks into a header; the
+    // export loop only reads `.editor` off each entry.
+    headerIds.forEach((id) => {
+      editor.converter.headerEditors.push({ id, editor: headerSubEditor });
+    });
+
+    const firstExport = await loadExportedHeaderCensus(await editor.exportDocx({ isFinalDoc: false }));
+    expect(firstExport).toEqual({ ins: 1, del: 1 });
+
+    const secondExport = await loadExportedHeaderCensus(await editor.exportDocx({ isFinalDoc: false }));
+    expect(secondExport).toEqual({ ins: 1, del: 1 });
+  });
+});