tdf#96113 sw: don't overwrite fo:background-color on ODT frame import

The situation is similar to commit
79fb61ef (tdf#92379: svx: don't
overwrite fo:background-color on ODF import, 2015-08-21), except that
here text frames had the problem of loosing colors when transparency is
set.

Fix the problem by informing getSvxBrushItemFromSourceSet() about if
we're in XML import or not.

Change-Id: Id1adf60b14a3762f0a2a43c49caeed9f6ea039be

sw/qa/extras/odfimport/odfimport.cxx

@@ -631,5 +631,11 @@ DECLARE_ODFIMPORT_TEST(testBnc800714, "bnc800714.fodt")
     CPPUNIT_ASSERT(getProperty<bool>(getParagraph(2), "ParaKeepTogether"));
 }
 
+DECLARE_ODFIMPORT_TEST(testTdf96113, "tdf96113.odt")
+{
+    // Background of the formula frame was white (0xffffff), not green.
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(0x00ff00), getProperty<sal_Int32>(getShape(1), "BackColor"));
+}
+
 CPPUNIT_PLUGIN_IMPLEMENT();
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

sw/source/core/unocore/unoframe.cxx

@@ -1803,7 +1803,7 @@ void SwXFrame::setPropertyValue(const OUString& rPropertyName, const ::uno::Any&
             if(RES_BACKGROUND == pEntry->nWID)
             {
                 const SwAttrSet& rSet = pFormat->GetAttrSet();
-                const SvxBrushItem aOriginalBrushItem(getSvxBrushItemFromSourceSet(rSet, RES_BACKGROUND));
+                const SvxBrushItem aOriginalBrushItem(getSvxBrushItemFromSourceSet(rSet, RES_BACKGROUND, true, pDoc->IsInXMLImport()));
                 SvxBrushItem aChangedBrushItem(aOriginalBrushItem);
 
                 aChangedBrushItem.PutValue(aValue, nMemberId);