tdf#94429, tdf#92198, tdf#95233: STYLE in conditional formatting

This is only a quick ugly hack and not a real fix. Basically we need to
prevent either using STYLE with more than one parameter in conditional
formatting functions or forbid the usage of STYLE completely.

In some way the usage of STYLE in conditional formatting means that our
current conditional formatting is not yet perfect. STYLE inside of a
conditional format is just insane from an evaluation perspective.

Change-Id: Ia1cc8c8cc8f00c8d4a055b1c2d128de3e1f8e4fa

sc/source/core/tool/interpr2.cxx

@@ -45,6 +45,7 @@
 #include "postit.hxx"
 #include "tokenarray.hxx"
 #include "globalnames.hxx"
+#include "stlsheet.hxx"
 
 #include <com/sun/star/sheet/DataPilotFieldFilter.hpp>
 
@@ -2386,10 +2387,21 @@ void ScInterpreter::ScStyle()
             if (pShell)
             {
                 // notify object shell directly!
+                bool bNotify = true;
+                if (aStyle2.isEmpty())
+                {
+                    const ScStyleSheet* pStyle = pDok->GetStyle(aPos.Col(), aPos.Row(), aPos.Tab());
+
+                    if (pStyle && pStyle->GetName() == aStyle1)
+                        bNotify = false;
+                }
 
-                ScRange aRange(aPos);
-                ScAutoStyleHint aHint( aRange, aStyle1, nTimeOut, aStyle2 );
-                pShell->Broadcast( aHint );
+                if (bNotify)
+                {
+                    ScRange aRange(aPos);
+                    ScAutoStyleHint aHint( aRange, aStyle1, nTimeOut, aStyle2 );
+                    pShell->Broadcast( aHint );
+                }
             }
         }