[gtk/readonly-events-1: 5/51] x11: Stop relying on root coordinates in events

[Matthias Clasen <matthiasc src gnome org>]

commit db2fc1ce8f66de4863d3f51232b486b1e446a930
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Feb 14 18:17:13 2020 -0500

    x11: Stop relying on root coordinates in events
    
    The X11 dnd code was still using x_root/y_root in
    GdkEventMotion in a couple of places. Stop doing so,
    these field are going away soon.

 gdk/x11/gdkdrag-x11.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)
---
diff --git a/gdk/x11/gdkdrag-x11.c b/gdk/x11/gdkdrag-x11.c
index fb341088c2..c369ca0316 100644
--- a/gdk/x11/gdkdrag-x11.c
+++ b/gdk/x11/gdkdrag-x11.c
@@ -2243,15 +2243,18 @@ gdk_drag_update (GdkDrag         *drag,
 }
 
 static gboolean
-gdk_dnd_handle_motion_event (GdkDrag              *drag,
-                             const GdkEventMotion *event)
+gdk_dnd_handle_motion_event (GdkDrag        *drag,
+                             const GdkEvent *event)
 {
   GdkModifierType state;
+  int x_root, y_root;
 
   if (!gdk_event_get_state ((GdkEvent *) event, &state))
     return FALSE;
 
-  gdk_drag_update (drag, event->x_root, event->y_root, state,
+  x_root = event->any.surface->x + event->motion.x;
+  y_root = event->any.surface->y + event->motion.y;
+  gdk_drag_update (drag, x_root, y_root, state,
                    gdk_event_get_time ((GdkEvent *) event));
   return TRUE;
 }
@@ -2407,7 +2410,7 @@ gdk_x11_drag_handle_event (GdkDrag        *drag,
   switch ((guint) event->any.type)
     {
     case GDK_MOTION_NOTIFY:
-      return gdk_dnd_handle_motion_event (drag, &event->motion);
+      return gdk_dnd_handle_motion_event (drag, event);
     case GDK_BUTTON_RELEASE:
       return gdk_dnd_handle_button_event (drag, &event->button);
     case GDK_KEY_PRESS: