There's no reason for GetDefaultContentType to be virtual

unroll the logic a bit to simplify the only relevant case and take advantage of
return optimization

Change-Id: I88537e83e8fc6785d3932fb4c591d62319682c9b

tools/inc/tools/inetmsg.hxx

@@ -500,7 +500,7 @@ public:
         return GetHeaderValue (m_nIndex[INETMSG_MIME_CONTENT_TRANSFER_ENCODING]);
     }
 
-    virtual void GetDefaultContentType (UniString& rContentType);
+    UniString GetDefaultContentType ();
 
     /** Message container methods.
      */

tools/source/inet/inetmsg.cxx

@@ -1033,36 +1033,18 @@ void INetMIMEMessage::SetContentTransferEncoding (
 /*
  * GetDefaultContentType.
  */
-void INetMIMEMessage::GetDefaultContentType (String& rContentType)
+UniString INetMIMEMessage::GetDefaultContentType()
 {
-    String aDefaultCT (
-        "text/plain; charset=us-ascii", RTL_TEXTENCODING_ASCII_US);
-    if (pParent == NULL)
-    {
-        rContentType = aDefaultCT;
-    }
-    else
+    if (pParent != NULL)
     {
         String aParentCT (pParent->GetContentType());
         if (aParentCT.Len() == 0)
-            pParent->GetDefaultContentType (aParentCT);
+            aParentCT = pParent->GetDefaultContentType();
 
-        if (aParentCT.CompareIgnoreCaseToAscii ("message/", 8) == 0)
-        {
-            rContentType = aDefaultCT;
-        }
-        else if (aParentCT.CompareIgnoreCaseToAscii ("multipart/", 10) == 0)
-        {
-            if (aParentCT.CompareIgnoreCaseToAscii ("multipart/digest") == 0)
-                rContentType.AssignAscii ("message/rfc822");
-            else
-                rContentType = aDefaultCT;
-        }
-        else
-        {
-            rContentType = aDefaultCT;
-        }
+        if (aParentCT.CompareIgnoreCaseToAscii ("multipart/digest") == 0)
+            return rtl::OUString("message/rfc822");
     }
+    return String("text/plain; charset=us-ascii", RTL_TEXTENCODING_ASCII_US);
 }
 
 /*

tools/source/inet/inetstrm.cxx

@@ -1349,8 +1349,7 @@ int INetMIMEMessageStream::GetMsgLine (sal_Char *pData, sal_uIntPtr nSize)
             if (aContentType.Len())
             {
                 // Determine default Content-Type.
-                UniString aDefaultType;
-                pMsg->GetDefaultContentType (aDefaultType);
+                UniString aDefaultType = pMsg->GetDefaultContentType();
 
                 if (aDefaultType.CompareIgnoreCaseToAscii (
                     aContentType, aContentType.Len()) == 0)
@@ -1380,7 +1379,7 @@ int INetMIMEMessageStream::GetMsgLine (sal_Char *pData, sal_uIntPtr nSize)
                 if (aContentType.Len() == 0)
                 {
                     // Determine default Content-Type.
-                    pMsg->GetDefaultContentType (aContentType);
+                    aContentType = pMsg->GetDefaultContentType();
                 }
                 eEncoding = GetMsgEncoding (aContentType);
             }
@@ -1739,8 +1738,7 @@ int INetMIMEMessageStream::PutMsgLine (const sal_Char *pData, sal_uIntPtr nSize)
              */
             if (pMsg->GetContentType().Len() == 0)
             {
-                String aDefaultCT;
-                pMsg->GetDefaultContentType (aDefaultCT);
+                String aDefaultCT = pMsg->GetDefaultContentType();
                 pMsg->SetContentType (aDefaultCT);
             }