hold WaterMarkLayout by reference

Change-Id: I7dc7739ee7b958319ddd4e0cf262254728ef0569
(cherry picked from commit 80509545)

lotuswordpro/source/filter/lwpframelayout.cxx

@@ -272,7 +272,7 @@ void LwpFrame::ApplyWrapType(XFFrameStyle *pFrameStyle)
         case LwpPlacableLayout::LAY_NO_WRAP_AROUND:
         {
             eWrap = enumXFWrapRunThrough;
-            if(!m_pLayout->GetBackColor() && !m_pLayout->GetWaterMarkLayout())
+            if(!m_pLayout->GetBackColor() && !m_pLayout->GetWaterMarkLayout().is())
             {
                 //pFrameStyle->SetBackGround(sal_True);
                 XFColor aXFColor(0xffffff); //white color
@@ -534,12 +534,13 @@ void LwpFrame::ApplyWatermark(XFFrameStyle *pFrameStyle)
     {
         pFrameStyle->SetBackImage(pBGImage);
         //set watermark transparent
-         LwpMiddleLayout* pLay = static_cast<LwpMiddleLayout*>(m_pLayout->GetWaterMarkLayout());
-         LwpBackgroundStuff* pBackgroundStuff = pLay->GetBackgroundStuff();
-         if(pBackgroundStuff && !pBackgroundStuff->IsTransparent())
-         {
-             pFrameStyle->SetTransparency(100);
-         }
+        rtl::Reference<LwpVirtualLayout> xWaterMarkLayout(m_pLayout->GetWaterMarkLayout());
+        LwpMiddleLayout* pLay = dynamic_cast<LwpMiddleLayout*>(xWaterMarkLayout.get());
+        LwpBackgroundStuff* pBackgroundStuff = pLay ? pLay->GetBackgroundStuff() : nullptr;
+        if(pBackgroundStuff && !pBackgroundStuff->IsTransparent())
+        {
+            pFrameStyle->SetTransparency(100);
+        }
      }
 }
 

lotuswordpro/source/filter/lwplayout.cxx

@@ -1357,18 +1357,18 @@ bool LwpMiddleLayout::IsProtected()
 * @descr:   Get watermark layout
 *
 */
-LwpVirtualLayout* LwpMiddleLayout::GetWaterMarkLayout()
+rtl::Reference<LwpVirtualLayout> LwpMiddleLayout::GetWaterMarkLayout()
 {
-    LwpVirtualLayout* pLay = dynamic_cast<LwpVirtualLayout*>(GetChildHead().obj().get());
-    while(pLay)
+    rtl::Reference<LwpVirtualLayout> xLay(dynamic_cast<LwpVirtualLayout*>(GetChildHead().obj().get()));
+    while (xLay.is())
     {
-        if( pLay->IsForWaterMark())
+        if (xLay->IsForWaterMark())
         {
-            return pLay;
+            return xLay;
         }
-        pLay = dynamic_cast<LwpVirtualLayout*> (pLay->GetNext().obj().get());
+        xLay.set(dynamic_cast<LwpVirtualLayout*>(xLay->GetNext().obj().get()));
     }
-    return nullptr;
+    return rtl::Reference<LwpVirtualLayout>();
 }
 
 /**
@@ -1377,7 +1377,8 @@ LwpVirtualLayout* LwpMiddleLayout::GetWaterMarkLayout()
 */
 XFBGImage* LwpMiddleLayout::GetXFBGImage()
 {
-    LwpMiddleLayout* pLay = static_cast<LwpMiddleLayout*>(GetWaterMarkLayout());
+    rtl::Reference<LwpVirtualLayout> xWaterMarkLayout(GetWaterMarkLayout());
+    LwpMiddleLayout* pLay = dynamic_cast<LwpMiddleLayout*>(xWaterMarkLayout.get());
     if(pLay)
     {
         //test BGImage

lotuswordpro/source/filter/lwplayout.hxx

@@ -322,7 +322,7 @@ public:
     virtual sal_uInt8 GetContentOrientation() override;
     virtual bool HonorProtection() override;
     virtual bool IsProtected() override;
-    LwpVirtualLayout* GetWaterMarkLayout();
+    rtl::Reference<LwpVirtualLayout> GetWaterMarkLayout();
     XFBGImage* GetXFBGImage();
     bool GetUsePrinterSettings();