use proper message passing

Change-Id: Ibcdc6a492abe5e26fb9b5244119be5dacc01b7b4
Reviewed-on: https://gerrit.libreoffice.org/31487Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Björn Michaelsen <bjoern.michaelsen@canonical.com>

sw/inc/frmfmt.hxx

@@ -237,7 +237,8 @@ public:
 namespace sw
 {
     enum class DrawFrameFormatHintId {
-        DYING
+        DYING,
+        PREPPASTING
     };
     struct SW_DLLPUBLIC DrawFrameFormatHint final: SfxHint
     {

sw/source/core/draw/dcontact.cxx

@@ -1536,6 +1536,9 @@ void SwDrawContact::SwClientNotify(const SwModify& rMod, const SfxHint& rHint)
             case sw::DrawFrameFormatHintId::DYING:
                 delete this;
                 break;
+            case sw::DrawFrameFormatHintId::PREPPASTING:
+                MoveObjToVisibleLayer(GetMaster());
+                break;
             default:
                 SAL_WARN("sw.core", "unhandled DrawFrameFormatHintId");
         }

sw/source/core/frmedt/fecopy.cxx

@@ -1007,11 +1007,7 @@ bool SwFEShell::Paste( SwDoc* pClpDoc )
                                 OSL_ENSURE( RES_DRAWFRMFMT == pNew->Which(), "Neues Format.");
                                 // #i52780# - drawing object has
                                 // to be made visible on paste.
-                                {
-                                    SwDrawContact* pContact =
-                                        static_cast<SwDrawContact*>(pNew->FindContactObj());
-                                    pContact->MoveObjToVisibleLayer( pContact->GetMaster() );
-                                }
+                                pNew->CallSwClientNotify(sw::DrawFrameFormatHint(sw::DrawFrameFormatHintId::PREPPASTING));
                                 SdrObject *pObj = pNew->FindSdrObject();
                                 SwDrawView  *pDV = Imp()->GetDrawView();
                                 pDV->MarkObj( pObj, pDV->GetSdrPageView() );