fdo#39694: SwTxtFld: do expand the field in the ctor

While only the text formatting is able to expand all fields correctly,
this is still good enough for many field types and fixes a race
condition when the field value is requested before layout is finished.
(regression from CWS sw34bf01, 8485708f)

sw/inc/txtfld.hxx

@@ -42,7 +42,8 @@ class SwTxtFld : public SwTxtAttr
     SwTxtNode * m_pTxtNode;
 
 public:
-    SwTxtFld(SwFmtFld & rAttr, xub_StrLen const nStart);
+    SwTxtFld(SwFmtFld & rAttr, xub_StrLen const nStart,
+            bool const bInClipboard);
     virtual ~SwTxtFld();
 
     void CopyFld( SwTxtFld *pDest ) const;

sw/source/core/crsr/crstrvl.cxx

@@ -710,7 +710,8 @@ sal_Bool SwCrsrShell::MoveFldType( const SwFieldType* pFldType, sal_Bool bNext,
             SwFmtFld* pFmtFld = new SwFmtFld( SwDateTimeField(
                 (SwDateTimeFieldType*)pDoc->GetSysFldType( RES_DATETIMEFLD ) ) );
 
-            pTxtFld = new SwTxtFld( *pFmtFld, rPos.nContent.GetIndex() );
+            pTxtFld = new SwTxtFld( *pFmtFld, rPos.nContent.GetIndex(),
+                        pDoc->IsClipBoard() );
             pTxtFld->ChgTxtNode( pTNd );
         }
 

sw/source/core/txtnode/atrfld.cxx

@@ -283,9 +283,12 @@ sal_Bool SwFmtFld::IsProtect() const
 |*
 *************************************************************************/
 
-SwTxtFld::SwTxtFld(SwFmtFld & rAttr, xub_StrLen const nStartPos)
+SwTxtFld::SwTxtFld(SwFmtFld & rAttr, xub_StrLen const nStartPos,
+        bool const bInClipboard)
     : SwTxtAttr( rAttr, nStartPos )
-    , m_aExpand( rAttr.GetFld()->ExpandField(true) )
+// fdo#39694 the ExpandField here may not give the correct result in all cases,
+// but is better than nothing
+    , m_aExpand( rAttr.GetFld()->ExpandField(bInClipboard) )
     , m_pTxtNode( 0 )
 {
     rAttr.pTxtAttr = this;

sw/source/core/txtnode/thints.cxx

@@ -1035,7 +1035,8 @@ SwTxtAttr* MakeTxtAttr( SwDoc & rDoc, SfxPoolItem& rAttr,
         pNew = new SwTxtINetFmt( (SwFmtINetFmt&)rNew, nStt, nEnd );
         break;
     case RES_TXTATR_FIELD:
-        pNew = new SwTxtFld( static_cast<SwFmtFld &>(rNew), nStt );
+        pNew = new SwTxtFld( static_cast<SwFmtFld &>(rNew), nStt,
+                    rDoc.IsClipBoard() );
         break;
     case RES_TXTATR_FLYCNT:
         {