CocoaSpice: update mouse position in tablet mode

CocoaSpice/CSInput.h

@@ -60,6 +60,7 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)sendMouseScroll:(SendScrollType)type button:(SendButtonType)button dy:(CGFloat)dy;
 - (void)sendMouseButton:(SendButtonType)button pressed:(BOOL)pressed point:(CGPoint)point;
 - (void)requestMouseMode:(BOOL)server;
+- (void)forceCursorPosition:(CGPoint)pos;
 
 - (id)initWithSession:(nonnull SpiceSession *)session channelID:(NSInteger)channelID monitorID:(NSInteger)monitorID;
 

CocoaSpice/CSInput.m

@@ -403,6 +403,10 @@ static int cs_button_to_spice(SendButtonType button)
     }
 }
 
+- (void)forceCursorPosition:(CGPoint)pos {
+    _mouse_guest = pos;
+}
+
 #pragma mark - Initializers
 
 - (id)init {

Views/VMDisplayMetalViewController+Touch.m

@@ -292,6 +292,7 @@ static CGFloat CGPointToPixel(CGFloat point) {
     translated = [self clipCursorToDisplay:translated];
     if (!self.vmInput.serverModeCursor) {
         [self.vmInput sendMouseMotion:(_mouseDown ? SEND_BUTTON_LEFT : SEND_BUTTON_NONE) point:translated];
+        [self.vmInput forceCursorPosition:translated]; // required to show cursor on screen
     } else {
         NSLog(@"Warning: ignored mouse set (%f, %f) while mouse is in server mode", translated.x, translated.y);
     }