Merge pull request #1627 from tom-un/user/tomun/fix-touch-pagexy-coordinates

Back port 1619 and 1288 to 0.68: Fix coordinates of touch.pageX/pageY coordinates when RCTRootView is not at the origin of the NSWindow

Author: Saadnajmi

React/Base/RCTTouchHandler.m

@@ -224,8 +224,10 @@ - (void)_updateReactTouchAtIndex:(NSInteger)touchIndex
 #else // [TODO(macOS GH#774)
   NSEvent *nativeTouch = _nativeTouches[touchIndex];
   CGPoint location = nativeTouch.locationInWindow;
-  CGPoint rootViewLocation = CGPointMake(location.x, CGRectGetHeight(self.view.window.frame) - location.y);
-  CGPoint touchViewLocation = rootViewLocation;
+  RCTAssert(_cachedRootView, @"We were unable to find a root view for the touch");
+  CGPoint rootViewLocation = [_cachedRootView.window.contentView convertPoint:location toView:_cachedRootView];
+  NSView *touchView = _touchViews[touchIndex];
+  CGPoint touchViewLocation = [touchView convertPoint:location fromView:nil];
 #endif // ]TODO(macOS GH#774)
 
   NSMutableDictionary *reactTouch = _reactTouches[touchIndex];