Resolves: rhbz#1353069 don't clear XATTR_FILL* from stylesheet if...

the master page is not the sole owner. Which happens when copying
and pasting slides which bring along a duplicate master page to
an already existing one, and the attempt to remove the duplicate
strips the fill properties from the shared stylesheet in use by
the other

regression from...

commit b876bbe2cacce8af379b10d82da6c7e7d229b361
Author: David Tardon <dtardon@redhat.com>
Date:   Tue Apr 26 09:17:11 2016 +0200

rbhz#1326602 avoid exp. bg bitmaps from deleted slides

Change-Id: I91fb8f622a0e35741ecc37cef14fc93199bb730b

1 files changed, 22 insertions, 15 deletions

diff --git a/svx/source/svdraw/svdundo.cxx b/svx/source/svdraw/svdundo.cxx
index abc459fdfddb..ec5f2fe61751 100644
--- a/svx/source/svdraw/svdundo.cxx
+++ b/svx/source/svdraw/svdundo.cxx
@@ -1444,10 +1444,11 @@ SdrUndoPageList::~SdrUndoPageList()
 }
 
 
-SdrUndoDelPage::SdrUndoDelPage(SdrPage& rNewPg)
+SdrUndoDelPage::SdrUndoDelPage(SdrPage& rNewPg, bool bSoleOwnerOfFillBitmapProps)
     : SdrUndoPageList(rNewPg)
     , pUndoGroup(nullptr)
     , mbHasFillBitmap(false)
+    , mbSoleOwnerOfFillBitmapProps(bSoleOwnerOfFillBitmapProps)
 {
     bItsMine = true;
 
@@ -1557,12 +1558,15 @@ void SdrUndoDelPage::clearFillBitmap()
 {
     if (mrPage.IsMasterPage())
     {
-        SfxStyleSheet* const pStyleSheet = mrPage.getSdrPageProperties().GetStyleSheet();
-        assert(bool(pStyleSheet)); // who took away my stylesheet?
-        SfxItemSet& rItemSet = pStyleSheet->GetItemSet();
-        rItemSet.ClearItem(XATTR_FILLBITMAP);
-        if (mbHasFillBitmap)
-            rItemSet.ClearItem(XATTR_FILLSTYLE);
+        if (mbSoleOwnerOfFillBitmapProps)
+        {
+            SfxStyleSheet* const pStyleSheet = mrPage.getSdrPageProperties().GetStyleSheet();
+            assert(bool(pStyleSheet)); // who took away my stylesheet?
+            SfxItemSet& rItemSet = pStyleSheet->GetItemSet();
+            rItemSet.ClearItem(XATTR_FILLBITMAP);
+            if (mbHasFillBitmap)
+                rItemSet.ClearItem(XATTR_FILLSTYLE);
+        }
     }
     else
     {
@@ -1577,12 +1581,15 @@ void SdrUndoDelPage::restoreFillBitmap()
 {
     if (mrPage.IsMasterPage())
     {
-        SfxStyleSheet* const pStyleSheet = mrPage.getSdrPageProperties().GetStyleSheet();
-        assert(bool(pStyleSheet)); // who took away my stylesheet?
-        SfxItemSet& rItemSet = pStyleSheet->GetItemSet();
-        rItemSet.Put(*mpFillBitmapItem);
-        if (mbHasFillBitmap)
-            rItemSet.Put(XFillStyleItem(css::drawing::FillStyle_BITMAP));
+        if (mbSoleOwnerOfFillBitmapProps)
+        {
+            SfxStyleSheet* const pStyleSheet = mrPage.getSdrPageProperties().GetStyleSheet();
+            assert(bool(pStyleSheet)); // who took away my stylesheet?
+            SfxItemSet& rItemSet = pStyleSheet->GetItemSet();
+            rItemSet.Put(*mpFillBitmapItem);
+            if (mbHasFillBitmap)
+                rItemSet.Put(XFillStyleItem(css::drawing::FillStyle_BITMAP));
+        }
     }
     else
     {
@@ -1839,9 +1846,9 @@ SdrUndoAction* SdrUndoFactory::CreateUndoMoveLayer(sal_uInt16 nLayerNum, SdrLaye
 }
 
 // page
-SdrUndoAction*  SdrUndoFactory::CreateUndoDeletePage(SdrPage& rPage)
+SdrUndoAction*  SdrUndoFactory::CreateUndoDeletePage(SdrPage& rPage, bool bSoleOwnerOfFillBitmapProps)
 {
-    return new SdrUndoDelPage( rPage );
+    return new SdrUndoDelPage(rPage, bSoleOwnerOfFillBitmapProps);
 }
 
 SdrUndoAction* SdrUndoFactory::CreateUndoNewPage(SdrPage& rPage)