tdf#96475 PutFormulaCell: any other cell than formula is utter nonsense

This is called only if a cell has the table:formula attribute and that *is* a
formula cell and nothing else. In fact in ODFF the initial leading '=' is not
mandatory, so attempting to set a different cell type if it is not present is
wrong.

Commit 62ec7f9e824ed1c17f01beaf8f4cec3b76b3aae9 introduced that, which at that
time may have been necessary, but doubtful..

Additionally, ScFormulaCell::CompileXML() that tries to group formulas had to
be adpated to not rely on the presence of a leading '='. Luckily there was an
assert..

These changes enable loading of "error cell" formulas that were stored without
a leading '=' if they originated from a paste special with only values, which
maintains an error result as error formula.

Change-Id: I43394de108066a24b792eec958b19f51f990403b

2 files changed, 16 insertions, 36 deletions

diff --git a/sc/source/core/data/formulacell.cxx b/sc/source/core/data/formulacell.cxx
index 400671830c8f..5750aa3409e4 100644
--- a/sc/source/core/data/formulacell.cxx
+++ b/sc/source/core/data/formulacell.cxx
@@ -1308,10 +1308,11 @@ void ScFormulaCell::CompileXML( sc::CompileFormulaContext& rCxt, ScProgress& rPr
             OUStringBuffer aShouldBeBuf;
             aBackComp.CreateStringFromTokenArray( aShouldBeBuf );
 
-            assert( aFormula[0] == '=' );
+            // The initial '=' is optional in ODFF.
+            const sal_Int32 nLeadingEqual = (aFormula.getLength() > 0 && aFormula[0] == '=') ? 1 : 0;
             OUString aShouldBe = aShouldBeBuf.makeStringAndClear();
-            if( aFormula.getLength() == aShouldBe.getLength() + 1 &&
-                aFormula.match( aShouldBe, 1 ) ) // initial '='
+            if (aFormula.getLength() == aShouldBe.getLength() + nLeadingEqual &&
+                    aFormula.match( aShouldBe, nLeadingEqual))
             {
                 // Put them in the same formula group.
                 ScFormulaCellGroupRef xGroup = pPreviousCell->GetCellGroup();
diff --git a/sc/source/filter/xml/xmlcelli.cxx b/sc/source/filter/xml/xmlcelli.cxx
index abc69871804e..f224852edbc6 100644
--- a/sc/source/filter/xml/xmlcelli.cxx
+++ b/sc/source/filter/xml/xmlcelli.cxx
@@ -1360,42 +1360,21 @@ void ScXMLTableRowCellContext::PutFormulaCell( const ScAddress& rCellPos )
 
     if ( !aText.isEmpty() )
     {
-        if ( aText[0] == '=' && aText.getLength() > 1 )
-        {
-            // temporary formula string as string tokens
-            ScTokenArray *pCode = new ScTokenArray();
+        // temporary formula string as string tokens
+        ScTokenArray *pCode = new ScTokenArray();
 
-            OUString aFormulaNmsp = maFormula->second;
-            if( eGrammar != formula::FormulaGrammar::GRAM_EXTERNAL )
-                aFormulaNmsp.clear();
-            pCode->AssignXMLString( aText, aFormulaNmsp );
+        OUString aFormulaNmsp = maFormula->second;
+        if( eGrammar != formula::FormulaGrammar::GRAM_EXTERNAL )
+            aFormulaNmsp.clear();
+        pCode->AssignXMLString( aText, aFormulaNmsp );
 
-            rDoc.getDoc().IncXMLImportedFormulaCount( aText.getLength() );
-            ScFormulaCell* pNewCell = new ScFormulaCell(pDoc, rCellPos, pCode, eGrammar, MM_NONE);
-            SetFormulaCell(pNewCell);
-            rDoc.setFormulaCell(rCellPos, pNewCell);
+        rDoc.getDoc().IncXMLImportedFormulaCount( aText.getLength() );
+        ScFormulaCell* pNewCell = new ScFormulaCell(pDoc, rCellPos, pCode, eGrammar, MM_NONE);
+        SetFormulaCell(pNewCell);
+        rDoc.setFormulaCell(rCellPos, pNewCell);
 
-            // Re-calculate to get number format only when style is not set.
-            pNewCell->SetNeedNumberFormat(!mbHasStyle);
-        }
-        else if ( aText[0] == '\'' && aText.getLength() > 1 )
-        {
-            //  for bEnglish, "'" at the beginning is always interpreted as text
-            //  marker and stripped
-            rDoc.setStringCell(rCellPos, aText.copy(1));
-        }
-        else
-        {
-            SvNumberFormatter* pFormatter = pDoc->GetFormatTable();
-            sal_uInt32 nEnglish = pFormatter->GetStandardIndex(LANGUAGE_ENGLISH_US);
-            double fVal;
-            if ( pFormatter->IsNumberFormat( aText, nEnglish, fVal ) )
-                rDoc.setNumericCell(rCellPos, fVal);
-            //the (english) number format will not be set
-            //search matching local format and apply it
-            else
-                rDoc.setStringCell(rCellPos, aText);
-        }
+        // Re-calculate to get number format only when style is not set.
+        pNewCell->SetNeedNumberFormat(!mbHasStyle);
     }
 }