Fix embedded TopLevel coordinate conversion (#16181)

* Fix embedded TopLevel coordinate conversion

* Adjust client / screen coordinate conversion

* Remove commented code

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

@@ -23,5 +23,4 @@
 -(void) setResizeReason:(AvnPlatformResizeReason)reason;
 -(void) setRenderTarget:(NSObject<IRenderTarget>* _Nonnull)target;
 -(void) raiseAccessibilityChildrenChanged;
-+ (AvnPoint)toAvnPoint:(CGPoint)p;
 @end

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

@@ -189,16 +189,6 @@
     return pt;
 }
 
-+ (AvnPoint)toAvnPoint:(CGPoint)p
-{
-    AvnPoint result;
-
-    result.X = p.x;
-    result.Y = p.y;
-
-    return result;
-}
-
 - (void) viewDidChangeBackingProperties
 {
     auto fsize = [self convertSizeToBacking: [self frame].size];
@@ -255,9 +245,13 @@
         return;
     }
 
-    auto localPoint = [self convertPoint:[event locationInWindow] toView:self];
-    auto avnPoint = [AvnView toAvnPoint:localPoint];
-    auto point = [self translateLocalPoint:avnPoint];
+    NSPoint eventLocation = [event locationInWindow];
+    
+    auto viewLocation = [self convertPoint:NSMakePoint(0, 0) toView:nil];
+    
+    auto localPoint = NSMakePoint(eventLocation.x - viewLocation.x, viewLocation.y - eventLocation.y);
+    
+    auto point = ToAvnPoint(localPoint);
     AvnVector delta = { 0, 0};
 
     if(type == Wheel)
@@ -734,7 +728,7 @@
 - (NSDragOperation)triggerAvnDragEvent: (AvnDragEventType) type info: (id <NSDraggingInfo>)info
 {
     auto localPoint = [self convertPoint:[info draggingLocation] toView:self];
-    auto avnPoint = [AvnView toAvnPoint:localPoint];
+    auto avnPoint = ToAvnPoint(localPoint);
     auto point = [self translateLocalPoint:avnPoint];
     auto modifiers = [self getModifiers:[[NSApp currentEvent] modifierFlags]];
     NSDragOperation nsop = [info draggingSourceOperationMask];

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

@@ -462,7 +462,7 @@
 
                 if (!NSPointInRect(viewPoint, view.bounds))
                 {
-                    auto avnPoint = [AvnView toAvnPoint:windowPoint];
+                    auto avnPoint = ToAvnPoint(windowPoint);
                     auto point = [self translateLocalPoint:avnPoint];
                     AvnVector delta = { 0, 0 };
 

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

@@ -192,11 +192,23 @@ HRESULT TopLevelImpl::PointToClient(AvnPoint point, AvnPoint *ret) {
             return S_OK;
         }
         
-        point = ConvertPointY(point);
-        NSRect convertRect = [window convertRectFromScreen:NSMakeRect(point.X, point.Y, 0.0, 0.0)];
-        auto viewPoint = NSMakePoint(convertRect.origin.x, convertRect.origin.y);
+        auto frame = [View frame];
+        
+        auto viewRect = [View convertRect:frame toView:nil];
+        
+        auto viewScreenRect = [window convertRectToScreen:viewRect];
+        
+        auto primaryDisplayHeight = NSMaxY([[[NSScreen screens] firstObject] frame]);
+        
+        //Window coord are bottom to top so we need to adjust by primaryScreenHeight
+        auto viewScreenLocation = NSMakePoint(viewScreenRect.origin.x, primaryDisplayHeight - viewScreenRect.origin.y - frame.size.height);
+        
+        //Substract client point from screen position of the view
+        auto localPoint = NSMakePoint(point.X - viewScreenLocation.x, point.Y - viewScreenLocation.y);
+        
+        point = ToAvnPoint(localPoint);
 
-        *ret = [View translateLocalPoint:ToAvnPoint(viewPoint)];
+        *ret = point;
 
         return S_OK;
     }
@@ -217,11 +229,24 @@ HRESULT TopLevelImpl::PointToScreen(AvnPoint point, AvnPoint *ret) {
             
             return S_OK;
         }
+        
+        auto frame = [View frame];
+        
+        //Get rect inside current window
+        auto viewRect = [View convertRect:frame toView:nil];
+        
+        //Get screen rect of the view
+        auto viewScreenRect = [window convertRectToScreen:viewRect];
+               
+        auto primaryDisplayHeight = NSMaxY([[[NSScreen screens] firstObject] frame]);
+        
+        //Window coord are bottom to top so we need to adjust by primaryScreenHeight
+        auto viewScreenLocation = NSMakePoint(viewScreenRect.origin.x, primaryDisplayHeight - viewScreenRect.origin.y - frame.size.height);
 
-        auto cocoaViewPoint = ToNSPoint([View translateLocalPoint:point]);
-        NSRect convertRect = [window convertRectToScreen:NSMakeRect(cocoaViewPoint.x, cocoaViewPoint.y, 0.0, 0.0)];
-        auto cocoaScreenPoint = NSPointFromCGPoint(NSMakePoint(convertRect.origin.x, convertRect.origin.y));
-        *ret = ConvertPointY(ToAvnPoint(cocoaScreenPoint));
+        //Add client point to screen position of the view
+        auto screenPoint = ToAvnPoint(NSMakePoint(viewScreenLocation.x + point.X, viewScreenLocation.y + point.Y));
+        
+        *ret = screenPoint;
 
         return S_OK;
     }