convert SdrLayerId to strong_int

Also
- rename SetOfByte to SdrLayerIDSet
- add asserts in SdrLayerAdmin::GetUniqueLayerID so that we don't
  allocate overlapping SdrLayerID values
- add a new constant SDRLAYERPOS_NOTFOUND to be returned from
  SdrLayerAdmin::GetLayerPos

Change-Id: I3bb3489f9338e3d02c4040bcbd811744699941c8
Reviewed-on: https://gerrit.libreoffice.org/37467
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

2 files changed, 3 insertions, 3 deletions

diff --git a/svx/inc/sdr/contact/viewobjectcontactofgroup.hxx b/svx/inc/sdr/contact/viewobjectcontactofgroup.hxx
index 416ca0fb633b..af2dd6644998 100644
--- a/svx/inc/sdr/contact/viewobjectcontactofgroup.hxx
+++ b/svx/inc/sdr/contact/viewobjectcontactofgroup.hxx
@@ -37,7 +37,7 @@ namespace sdr
             virtual drawinglayer::primitive2d::Primitive2DContainer getPrimitive2DSequenceHierarchy(DisplayInfo& rDisplayInfo) const override;
 
         private:
-            virtual bool isPrimitiveVisibleOnAnyLayer(const SetOfByte& aLayers) const override;
+            virtual bool isPrimitiveVisibleOnAnyLayer(const SdrLayerIDSet& aLayers) const override;
         };
     } // end of namespace contact
 } // end of namespace sdr
diff --git a/svx/inc/sxlayitm.hxx b/svx/inc/sxlayitm.hxx
index 47fba3a9b616..9516f4efb9de 100644
--- a/svx/inc/sxlayitm.hxx
+++ b/svx/inc/sxlayitm.hxx
@@ -26,8 +26,8 @@
 
 class SdrLayerIdItem: public SfxUInt16Item {
 public:
-    SdrLayerIdItem(sal_uInt16 nId=0): SfxUInt16Item(SDRATTR_LAYERID,nId)  {}
-    SdrLayerID GetValue() const { return (SdrLayerID)SfxUInt16Item::GetValue(); }
+    SdrLayerIdItem(SdrLayerID nId): SfxUInt16Item(SDRATTR_LAYERID,sal_uInt8(nId))  {}
+    SdrLayerID GetValue() const { return SdrLayerID(SfxUInt16Item::GetValue()); }
     virtual SfxPoolItem* Clone(SfxItemPool* pPool=nullptr) const override;
 };