sd::ViewShell::GetTextSelection: fix text/richtext handling

Change-Id: If7d75d48667cd48d9426b02a38d2cf539b248d26
(cherry picked from commit abd92f37)

sd/qa/unit/tiledrendering/tiledrendering.cxx

@@ -303,6 +303,9 @@ void SdTiledRenderingTest::testGetTextSelection()
     rEditView.SetSelection(aWordSelection);
     // Did we indeed manage to copy the selected text?
     CPPUNIT_ASSERT_EQUAL(OString("Shape"), pXImpressDocument->getTextSelection("text/plain;charset=utf-8"));
+
+    // Make sure returned RTF is not empty.
+    CPPUNIT_ASSERT(!OString(pXImpressDocument->getTextSelection("text/richtext")).isEmpty());
 }
 
 void SdTiledRenderingTest::testSetGraphicSelection()

sd/source/ui/view/viewshel.cxx

@@ -611,6 +611,12 @@ OString ViewShell::GetTextSelection(OString aMimeType)
         else
             aRet = OString(reinterpret_cast<const sal_Char *>(aString.getStr()), aString.getLength() * sizeof(sal_Unicode));
     }
+    else
+    {
+        uno::Sequence<sal_Int8> aSequence;
+        aAny >>= aSequence;
+        aRet = OString(reinterpret_cast<sal_Char*>(aSequence.getArray()), aSequence.getLength());
+    }
 
     return aRet;
 }