tdf#135978 sw_redlinehide: recreate fly frames anchored to subsequent nodes

... in SwTextNode::JoinNext().

The 2nd node is deleted, so its frame is deleted, and if it is the start
of a merged frame, fly frames on the node itself will be recreated
already, but those on subseqent nodes need an extra call.

Change-Id: I18999946334f5560b720d3d275610bc8b07973f6
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/133335
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>
(cherry picked from commit 98ae340307786c8fe18addc3714c9b859fdf12dd)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/133293
Reviewed-by: Thorsten Behrens <thorsten.behrens@allotropia.de>

2 files changed, 56 insertions, 0 deletions

diff --git a/sw/qa/extras/uiwriter/uiwriter.cxx b/sw/qa/extras/uiwriter/uiwriter.cxx
index 7a16fcc556ce..8c186e645ee9 100644
--- a/sw/qa/extras/uiwriter/uiwriter.cxx
+++ b/sw/qa/extras/uiwriter/uiwriter.cxx
@@ -689,6 +689,57 @@ void SwUiWriterTest::testTdf67238()
     CPPUNIT_ASSERT(!((rTable.GetTableBox("C3"))->GetFrameFormat()->GetProtect()).IsContentProtected());
 }
 
+CPPUNIT_TEST_FIXTURE(SwUiWriterTest, testTdf135978)
+{
+    SwDoc* pDoc = createSwDoc();
+    SwWrtShell* pWrtShell = pDoc->GetDocShell()->GetWrtShell();
+
+    pWrtShell->Insert("foobar");
+    pWrtShell->SplitNode();
+    pWrtShell->Insert("bazquux");
+
+    CPPUNIT_ASSERT(pWrtShell->IsEndOfDoc());
+
+    SwFormatAnchor anchor(RndStdIds::FLY_AT_CHAR);
+    anchor.SetAnchor(pWrtShell->GetCursor()->GetPoint());
+    SfxItemSet flySet(pDoc->GetAttrPool(), svl::Items<RES_ANCHOR, RES_ANCHOR>{});
+    flySet.Put(anchor);
+    SwFlyFrameFormat const* pFly = dynamic_cast<SwFlyFrameFormat const*>(
+            pWrtShell->NewFlyFrame(flySet, /*bAnchValid=*/true));
+    CPPUNIT_ASSERT(pFly != nullptr);
+    CPPUNIT_ASSERT(pFly->GetFrame() != nullptr);
+    // move cursor back to body
+    pWrtShell->SttEndDoc(/*bStt=*/false);
+
+    // hide and enable
+    dispatchCommand(mxComponent, ".uno:ShowTrackedChanges", {});
+    dispatchCommand(mxComponent, ".uno:TrackChanges", {});
+
+    CPPUNIT_ASSERT(pDoc->getIDocumentRedlineAccess().IsRedlineOn());
+    CPPUNIT_ASSERT(
+        IDocumentRedlineAccess::IsShowChanges(pDoc->getIDocumentRedlineAccess().GetRedlineFlags()));
+    CPPUNIT_ASSERT(pWrtShell->GetLayout()->IsHideRedlines());
+
+    pWrtShell->Left(CRSR_SKIP_CHARS, /*bSelect=*/false, 4, /*bBasicCall=*/false);
+    pWrtShell->Left(CRSR_SKIP_CHARS, /*bSelect=*/true, 6, /*bBasicCall=*/false);
+    pWrtShell->Delete();
+
+    // now split
+    pWrtShell->SttEndDoc(/*bStt=*/true);
+    pWrtShell->SplitNode();
+    CPPUNIT_ASSERT(pFly->GetFrame() != nullptr);
+
+    // the problem was that undo removed the fly frame from the layout
+    pWrtShell->Undo();
+    CPPUNIT_ASSERT(pFly->GetFrame() != nullptr);
+
+    pWrtShell->Redo();
+    CPPUNIT_ASSERT(pFly->GetFrame() != nullptr);
+
+    pWrtShell->Undo();
+    CPPUNIT_ASSERT(pFly->GetFrame() != nullptr);
+}
+
 void SwUiWriterTest::testFdo75110()
 {
     SwDoc* pDoc = createSwDoc(DATA_DIRECTORY, "fdo75110.odt");
diff --git a/sw/source/core/txtnode/ndtxt.cxx b/sw/source/core/txtnode/ndtxt.cxx
index 415c54b745e5..66fef7950e36 100644
--- a/sw/source/core/txtnode/ndtxt.cxx
+++ b/sw/source/core/txtnode/ndtxt.cxx
@@ -882,6 +882,11 @@ void CheckResetRedlineMergeFlag(SwTextNode & rNode, Recreate const eRecreateMerg
             {
                 assert(pFrame->GetMergedPara()->listener.IsListeningTo(&rNode));
                 assert(rNode.GetIndex() <= pFrame->GetMergedPara()->pLastNode->GetIndex());
+                // tdf#135978 Join: recreate fly frames anchored to subsequent nodes
+                if (eRecreateMerged == sw::Recreate::ThisNode)
+                {
+                    AddRemoveFlysAnchoredToFrameStartingAtNode(*pFrame, rNode, nullptr);
+                }
             }
             eMode = sw::FrameMode::New; // Existing is not idempotent!
         }