Paint drop cap background only once

Painting default background is unecessary when
there is a user defined background.

Change-Id: I6564f403f0f7769b5460b07d5f3947be08c0dbf6

sw/source/core/text/txtdrop.cxx

@@ -273,10 +273,6 @@ bool SwTxtNode::GetDropSize(int& rFontHeight, int& rDropHeight, int& rDropDescen
 
 void SwDropPortion::PaintTxt( const SwTxtPaintInfo &rInf ) const
 {
-    if ( rInf.OnWin() &&
-        !rInf.GetOpt().IsPagePreview() && !rInf.GetOpt().IsReadonly() && SwViewOption::IsFieldShadings()    )
-        rInf.DrawBackground( *this );
-
     OSL_ENSURE( nDropHeight && pPart && nLines != 1, "Drop Portion painted twice" );
 
     const SwDropPortionPart* pCurrPart = GetPart();
@@ -299,6 +295,13 @@ void SwDropPortion::PaintTxt( const SwTxtPaintInfo &rInf ) const
         ((SwTxtPaintInfo&)rInf).SetLen( pCurrPart->GetLen() );
         SwFontSave aFontSave( rInf, &pCurrPart->GetFont() );
 
+        if ( rInf.OnWin() &&
+            !rInf.GetOpt().IsPagePreview() && !rInf.GetOpt().IsReadonly() && SwViewOption::IsFieldShadings() &&
+            (!pCurrPart->GetFont().GetBackColor() || *pCurrPart->GetFont().GetBackColor() == Color(COL_TRANSPARENT)) )
+        {
+            rInf.DrawBackground( *this );
+        }
+
         SwTxtPortion::Paint( rInf );
 
         ((SwTxtPaintInfo&)rInf).SetIdx( rInf.GetIdx() + pCurrPart->GetLen() );