implement seperator support on native side.

native/Avalonia.Native/inc/avalonia-native.h

@@ -179,6 +179,7 @@ public:
     virtual HRESULT SetAppMenu(IAvnAppMenu* menu) = 0;
     virtual HRESULT CreateMenu (IAvnAppMenu** ppv) = 0;
     virtual HRESULT CreateMenuItem (IAvnAppMenuItem** ppv) = 0;
+    virtual HRESULT CreateMenuItemSeperator (IAvnAppMenuItem** ppv) = 0;
 };
 
 AVNCOM(IAvnString, 17) : IUnknown

native/Avalonia.Native/src/OSX/common.h

@@ -21,6 +21,7 @@ extern IAvnGlFeature* GetGlFeature();
 extern IAvnGlSurfaceRenderTarget* CreateGlRenderTarget(NSWindow* window, NSView* view);
 extern IAvnAppMenu* CreateAppMenu();
 extern IAvnAppMenuItem* CreateAppMenuItem();
+extern IAvnAppMenuItem* CreateAppMenuItemSeperator();
 extern void SetAppMenu (IAvnAppMenu* appMenu);
 extern IAvnAppMenu* GetAppMenu ();
 extern NSMenuItem* GetAppMenuItem ();

native/Avalonia.Native/src/OSX/main.mm

@@ -237,6 +237,12 @@ public:
         return S_OK;
     }
     
+    virtual HRESULT CreateMenuItemSeperator (IAvnAppMenuItem** ppv) override
+    {
+        *ppv = ::CreateAppMenuItemSeperator();
+        return S_OK;
+    }
+    
     virtual HRESULT SetAppMenu (IAvnAppMenu* appMenu) override
     {
         ::SetAppMenu(appMenu);

native/Avalonia.Native/src/OSX/menu.h

@@ -26,16 +26,17 @@ class AvnAppMenu;
 class AvnAppMenuItem : public ComSingleObject<IAvnAppMenuItem, &IID_IAvnAppMenuItem>
 {
 private:
-    AvnMenuItem* _native; // here we hold a pointer to an AvnMenuItem
+    NSMenuItem* _native; // here we hold a pointer to an AvnMenuItem
     IAvnActionCallback* _callback;
     IAvnPredicateCallback* _predicate;
+    bool _isSeperator;
     
 public:
     FORWARD_IUNKNOWN()
     
-    AvnAppMenuItem();
+    AvnAppMenuItem(bool isSeperator);
     
-    AvnMenuItem* GetNative();
+    NSMenuItem* GetNative();
     
     virtual HRESULT SetSubMenu (IAvnAppMenu* menu) override;
     

native/Avalonia.Native/src/OSX/menu.mm

@@ -43,13 +43,23 @@
 }
 @end
 
-AvnAppMenuItem::AvnAppMenuItem()
+AvnAppMenuItem::AvnAppMenuItem(bool isSeperator)
 {
-    _native = [[AvnMenuItem alloc] initWithAvnAppMenuItem: this];
+    _isSeperator = isSeperator;
+    
+    if(isSeperator)
+    {
+        _native = [NSMenuItem separatorItem];
+    }
+    else
+    {
+        _native = [[AvnMenuItem alloc] initWithAvnAppMenuItem: this];
+    }
+    
     _callback = nullptr;
 }
 
-AvnMenuItem* AvnAppMenuItem::GetNative()
+NSMenuItem* AvnAppMenuItem::GetNative()
 {
     return _native;
 }
@@ -137,7 +147,6 @@ HRESULT AvnAppMenu::AddItem (IAvnAppMenuItem* item)
     
     if(avnMenuItem != nullptr)
     {
-        
         [_native addItem: avnMenuItem->GetNative()];
     }
     
@@ -185,7 +194,15 @@ extern IAvnAppMenuItem* CreateAppMenuItem()
 {
     @autoreleasepool
     {
-        return new AvnAppMenuItem();
+        return new AvnAppMenuItem(false);
+    }
+}
+
+extern IAvnAppMenuItem* CreateAppMenuItemSeperator()
+{
+    @autoreleasepool
+    {
+        return new AvnAppMenuItem(true);
     }
 }