Resolves: tdf#101711 problems with attempt to remove unused bg images

only do the save, unset (and possibly restore) of a bg image on the
stylesheet if it has one owner, this continue to make the original
scenario function without (so far anyway) the various reported problems

Change-Id: I73382961973b1c53bf2ceff205615727dd378c77

include/svx/svdundo.hxx

@@ -590,10 +590,9 @@ class SVX_DLLPUBLIC SdrUndoDelPage : public SdrUndoPageList
     SdrUndoGroup*               pUndoGroup;
     std::unique_ptr<SfxPoolItem> mpFillBitmapItem;
     bool mbHasFillBitmap;
-    bool mbSoleOwnerOfFillBitmapProps;
 
 public:
-    SdrUndoDelPage(SdrPage& rNewPg, bool bSoleOwnerOfFillBitmapProps);
+    SdrUndoDelPage(SdrPage& rNewPg);
     virtual ~SdrUndoDelPage() override;
 
     virtual void Undo() override;
@@ -765,7 +764,7 @@ public:
     virtual SdrUndoAction* CreateUndoMoveLayer(sal_uInt16 nLayerNum, SdrLayerAdmin& rNewLayerAdmin, SdrModel& rNewModel, sal_uInt16 nNeuPos1);
 
     // Page
-    virtual SdrUndoAction* CreateUndoDeletePage(SdrPage& rPage, bool bSoleOwnerOfFillBitmapProps = true);
+    virtual SdrUndoAction* CreateUndoDeletePage(SdrPage& rPage);
     virtual SdrUndoAction* CreateUndoNewPage(SdrPage& rPage);
     virtual SdrUndoAction* CreateUndoCopyPage(SdrPage& rPage);
     virtual SdrUndoAction* CreateUndoSetPageNum(SdrPage& rNewPg, sal_uInt16 nOldPageNum1, sal_uInt16 nNewPageNum1);

reportdesign/source/core/inc/ReportUndoFactory.hxx

@@ -59,7 +59,7 @@ namespace rptui
         virtual SdrUndoAction* CreateUndoMoveLayer(sal_uInt16 nLayerNum, SdrLayerAdmin& rNewLayerAdmin, SdrModel& rNewModel, sal_uInt16 nNeuPos1) override;
 
         // page
-        virtual SdrUndoAction* CreateUndoDeletePage(SdrPage& rPage, bool bSoleOwnerOfFillBitmapProps = true) override;
+        virtual SdrUndoAction* CreateUndoDeletePage(SdrPage& rPage) override;
         virtual SdrUndoAction* CreateUndoNewPage(SdrPage& rPage) override;
         virtual SdrUndoAction* CreateUndoCopyPage(SdrPage& rPage) override;
         virtual SdrUndoAction* CreateUndoSetPageNum(SdrPage& rNewPg, sal_uInt16 nOldPageNum1, sal_uInt16 nNewPageNum1) override;

reportdesign/source/core/sdr/ReportUndoFactory.cxx

@@ -133,9 +133,9 @@ SdrUndoAction* OReportUndoFactory::CreateUndoMoveLayer(sal_uInt16 nLayerNum, Sdr
 }
 
 // page
-SdrUndoAction*  OReportUndoFactory::CreateUndoDeletePage(SdrPage& rPage, bool bSoleOwnerOfFillBitmapProps)
+SdrUndoAction*  OReportUndoFactory::CreateUndoDeletePage(SdrPage& rPage)
 {
-    return m_pUndoFactory->CreateUndoDeletePage(rPage, bSoleOwnerOfFillBitmapProps);
+    return m_pUndoFactory->CreateUndoDeletePage(rPage);
 }
 
 SdrUndoAction* OReportUndoFactory::CreateUndoNewPage(SdrPage& rPage)

sc/source/core/data/drwlayer.cxx

@@ -412,7 +412,7 @@ void ScDrawLayer::ScRemovePage( SCTAB nTab )
     if (bRecording)
     {
         SdrPage* pPage = GetPage(static_cast<sal_uInt16>(nTab));
-        AddCalcUndo(new SdrUndoDelPage(*pPage, true));  // Undo-Action becomes the page owner
+        AddCalcUndo(new SdrUndoDelPage(*pPage));        // Undo-Action becomes the page owner
         RemovePage( static_cast<sal_uInt16>(nTab) );    // just deliver, not deleting
     }
     else

sd/source/core/drawdoc3.cxx

@@ -797,16 +797,7 @@ bool SdDrawDocument::InsertBookmarkAsPage(
                  eKind == pTest->GetPageKind() )
             {
                 if( bUndo )
-                {
+                    AddUndo(GetSdrUndoFactory().CreateUndoDeletePage(*pRefPage));
-                    bool bSoleOwnerOfStyleSheet = true;
-                    if (pRefPage->IsMasterPage())
-                    {
-                        const SfxStyleSheet* pRefSheet = pRefPage->getSdrPageProperties().GetStyleSheet();
-                        const SfxStyleSheet* pTestSheet = pTest->getSdrPageProperties().GetStyleSheet();
-                        bSoleOwnerOfStyleSheet = pRefSheet != pTestSheet;
-                    }
-                    AddUndo(GetSdrUndoFactory().CreateUndoDeletePage(*pRefPage, bSoleOwnerOfStyleSheet));
-                }
 
                 RemoveMasterPage(nPage);
 
@@ -1243,7 +1234,6 @@ void SdDrawDocument::RemoveUnnecessaryMasterPages(SdPage* pMasterPage, bool bOnl
         {
             // Do not delete master pages that have their precious flag set
             bool bDeleteMaster = !pMaster->IsPrecious();
-            bool bSoleOwnerOfStyleSheet = true;
             OUString aLayoutName = pMaster->GetLayoutName();
 
             if(bOnlyDuplicatePages )
@@ -1258,10 +1248,6 @@ void SdDrawDocument::RemoveUnnecessaryMasterPages(SdPage* pMasterPage, bool bOnl
                     {
                         // duplicate page found -> remove it
                         bDeleteMaster = true;
-
-                        const SfxStyleSheet* pRefSheet = pMaster->getSdrPageProperties().GetStyleSheet();
-                        const SfxStyleSheet* pTestSheet = pMPg->getSdrPageProperties().GetStyleSheet();
-                        bSoleOwnerOfStyleSheet = pRefSheet != pTestSheet;
                     }
                 }
             }
@@ -1295,7 +1281,7 @@ void SdDrawDocument::RemoveUnnecessaryMasterPages(SdPage* pMasterPage, bool bOnl
                     delete pNotesMaster;
 
                 if( bUndo )
-                    AddUndo(GetSdrUndoFactory().CreateUndoDeletePage(*pMaster, bSoleOwnerOfStyleSheet));
+                    AddUndo(GetSdrUndoFactory().CreateUndoDeletePage(*pMaster));
 
                 RemoveMasterPage( pMaster->GetPageNum() );
 

svx/source/svdraw/svdundo.cxx

@@ -1451,11 +1451,10 @@ SdrUndoPageList::~SdrUndoPageList()
 }
 
 
-SdrUndoDelPage::SdrUndoDelPage(SdrPage& rNewPg, bool bSoleOwnerOfFillBitmapProps)
+SdrUndoDelPage::SdrUndoDelPage(SdrPage& rNewPg)
     : SdrUndoPageList(rNewPg)
     , pUndoGroup(nullptr)
     , mbHasFillBitmap(false)
-    , mbSoleOwnerOfFillBitmapProps(bSoleOwnerOfFillBitmapProps)
 {
     bItsMine = true;
 
@@ -1564,11 +1563,11 @@ void SdrUndoDelPage::queryFillBitmap(const SfxItemSet& rItemSet)
 void SdrUndoDelPage::clearFillBitmap()
 {
     if (mrPage.IsMasterPage())
-    {
-        if (mbSoleOwnerOfFillBitmapProps)
     {
         SfxStyleSheet* const pStyleSheet = mrPage.getSdrPageProperties().GetStyleSheet();
         assert(bool(pStyleSheet)); // who took away my stylesheet?
+        if (pStyleSheet->GetListenerCount() == 1)
+        {
             SfxItemSet& rItemSet = pStyleSheet->GetItemSet();
             rItemSet.ClearItem(XATTR_FILLBITMAP);
             if (mbHasFillBitmap)
@@ -1587,11 +1586,11 @@ void SdrUndoDelPage::clearFillBitmap()
 void SdrUndoDelPage::restoreFillBitmap()
 {
     if (mrPage.IsMasterPage())
-    {
-        if (mbSoleOwnerOfFillBitmapProps)
     {
         SfxStyleSheet* const pStyleSheet = mrPage.getSdrPageProperties().GetStyleSheet();
         assert(bool(pStyleSheet)); // who took away my stylesheet?
+        if (pStyleSheet->GetListenerCount() == 1)
+        {
             SfxItemSet& rItemSet = pStyleSheet->GetItemSet();
             rItemSet.Put(*mpFillBitmapItem);
             if (mbHasFillBitmap)
@@ -1853,9 +1852,9 @@ SdrUndoAction* SdrUndoFactory::CreateUndoMoveLayer(sal_uInt16 nLayerNum, SdrLaye
 }
 
 // page
-SdrUndoAction*  SdrUndoFactory::CreateUndoDeletePage(SdrPage& rPage, bool bSoleOwnerOfFillBitmapProps)
+SdrUndoAction*  SdrUndoFactory::CreateUndoDeletePage(SdrPage& rPage)
 {
-    return new SdrUndoDelPage(rPage, bSoleOwnerOfFillBitmapProps);
+    return new SdrUndoDelPage(rPage);
 }
 
 SdrUndoAction* SdrUndoFactory::CreateUndoNewPage(SdrPage& rPage)