LOK Calc: an AutoFilter range keeps its rows

Calc regrows an unnamed AutoFilter range from the data around it: each
time the filter list opens (ExtendDataArea, ExtendBackColorArea, so
appended rows join) and whenever a command finds it from a single cell
(ScDocShell::GetDBData, so applying a condition, toggling it off, and
its undo). A totals row right under a marked block joined the filter,
showed in its list and hid with the data; a saved range reopened grew
the same way. Under LOK the range keeps the rows it was set on, as in
Excel, while the cursor is inside it; a cell in another block finds
that block. A single cell still takes the data area when the filter is set.

diff --git a/sc/source/core/tool/dbdata.cxx b/sc/source/core/tool/dbdata.cxx
index b1d714c55..9a01847ee 100644
--- a/sc/source/core/tool/dbdata.cxx
+++ b/sc/source/core/tool/dbdata.cxx
@@ -19,6 +19,7 @@
 
 #include <sal/config.h>
 #include <sal/log.hxx>
+#include <comphelper/lok.hxx>
 
 #include <o3tl/safeint.hxx>
 #include <unotools/transliterationwrapper.hxx>
@@ -646,6 +647,9 @@ bool ScDBData::UpdateReference(const ScDocument& rDoc, UpdateRefMode eUpdateRefM
 
 void ScDBData::ExtendDataArea(const ScDocument& rDoc)
 {
+    // LOK: an AutoFilter range keeps its rows, as in Excel.
+    if (comphelper::LibreOfficeKit::isActive() && bAutoFilter)
+        return;
     // Extend the DB area to include data rows immediately below.
     SCCOL nOldCol1 = nStartCol, nOldCol2 = nEndCol;
     SCROW nOldEndRow = nEndRow;
@@ -665,6 +669,8 @@ void ScDBData::ExtendDataArea(const ScDocument& rDoc)
 
 void ScDBData::ExtendBackColorArea(const ScDocument& rDoc)
 {
+    if (comphelper::LibreOfficeKit::isActive() && bAutoFilter)
+        return;
     // Extend the DB area to include data rows immediately below.
     SCCOL nOldCol1 = nStartCol, nOldCol2 = nEndCol;
     SCROW nOldEndRow = nEndRow;
diff --git a/sc/source/ui/docshell/docsh5.cxx b/sc/source/ui/docshell/docsh5.cxx
index d154597c3..5099dbe6f 100644
--- a/sc/source/ui/docshell/docsh5.cxx
+++ b/sc/source/ui/docshell/docsh5.cxx
@@ -19,6 +19,7 @@
 
 #include <memory>
 #include <sal/config.h>
+#include <comphelper/lok.hxx>
 
 #include <cassert>
 
@@ -147,7 +148,10 @@ ScDBData* ScDocShell::GetDBData( const ScRange& rMarked, ScGetDBMode eMode, ScGe
         if (!bSelected)
         {
             bUseThis = true;
-            if ( bIsNoName && (eMode == SC_DB_MAKE || eMode == SC_DB_AUTOFILTER) )
+            // LOK: an AutoFilter range keeps its rows, as in Excel.
+            const bool bKeep = comphelper::LibreOfficeKit::isActive() && pData->HasAutoFilter()
+                && nCol >= nOldCol1 && nCol <= nOldCol2 && nRow >= nOldRow1 && nRow <= nOldRow2;
+            if ( bIsNoName && !bKeep && (eMode == SC_DB_MAKE || eMode == SC_DB_AUTOFILTER) )
             {
                 // If nothing marked or only one row marked, adapt
                 // "unnamed" to contiguous area.