Resolves: tdf#126116 keep original date format if detected type is identical

Regression from

    commit 478e051f4ea13b15120fdf74faf94a6c2cfcb50c
    CommitDate: Tue May 21 15:35:07 2019 +0200

        Resolves: tdf#125109 prefer edit format's acceptance patterns and YMD order

Change-Id: If1240f75ca7c4d46c156966a72b6a98c83448770
Reviewed-on: https://gerrit.libreoffice.org/74803
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins
(cherry picked from commit e6a1bbe6690474e752416c81e1ca8c82b2843539)
Reviewed-on: https://gerrit.libreoffice.org/74806

1 files changed, 17 insertions, 5 deletions

diff --git a/sc/source/core/data/column3.cxx b/sc/source/core/data/column3.cxx
index 26096767906e..96a077b410c4 100644
--- a/sc/source/core/data/column3.cxx
+++ b/sc/source/core/data/column3.cxx
@@ -2072,11 +2072,23 @@ bool ScColumn::ParseString(
                 if (!bIsNumberFormat)
                     break;
 
-                // convert back to the original language if a built-in format was detected
-                if (!pOldFormat)
-                    pOldFormat = aParam.mpNumFormatter->GetEntry( nOldIndex );
-                if ( pOldFormat )
-                    nIndex = aParam.mpNumFormatter->GetFormatForLanguageIfBuiltIn( nIndex, pOldFormat->GetLanguage() );
+                // If we have bForceFormatDate, the pOldFormat was/is of
+                // nOldIndex date(+time) type already, if detected type is
+                // compatible keep the original format.
+                if (bForceFormatDate && SvNumberFormatter::IsCompatible(
+                            eNumFormatType, aParam.mpNumFormatter->GetType( nIndex)))
+                {
+                    nIndex = nOldIndex;
+                }
+                else
+                {
+                    // convert back to the original language if a built-in format was detected
+                    if (!pOldFormat)
+                        pOldFormat = aParam.mpNumFormatter->GetEntry( nOldIndex );
+                    if (pOldFormat)
+                        nIndex = aParam.mpNumFormatter->GetFormatForLanguageIfBuiltIn(
+                                nIndex, pOldFormat->GetLanguage());
+                }
 
                 rCell.set(nVal);
                 if ( nIndex != nOldIndex)