[gtk/fix-dnd: 3/3] wayland: Pass root coordinates for dnd events

[Matthias Clasen <matthiasc src gnome org>]

commit 15242d66e114b9121cb41cdd9961c9735934fedc
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Dec 30 12:00:53 2019 -0500

    wayland: Pass root coordinates for dnd events
    
    That is what the api currently requires, so provide it.
    
    This fixes DND to work again, for the most part.

 gdk/wayland/gdkdevice-wayland.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)
---
diff --git a/gdk/wayland/gdkdevice-wayland.c b/gdk/wayland/gdkdevice-wayland.c
index 3e3d4748b2..232948a2ba 100644
--- a/gdk/wayland/gdkdevice-wayland.c
+++ b/gdk/wayland/gdkdevice-wayland.c
@@ -1296,6 +1296,7 @@ data_device_motion (void                  *data,
                     wl_fixed_t             y)
 {
   GdkWaylandSeat *seat = data;
+  int origin_x, origin_y;
 
   GDK_DISPLAY_NOTE (seat->display, EVENTS,
             g_message ("data device motion, data_device = %p, time = %d, x = %f, y = %f",
@@ -1308,10 +1309,12 @@ data_device_motion (void                  *data,
   seat->pointer_info.surface_x = wl_fixed_to_double (x);
   seat->pointer_info.surface_y = wl_fixed_to_double (y);
 
+  gdk_surface_get_origin (gdk_drop_get_surface (seat->drop), &origin_x, &origin_y);
+
   gdk_drop_emit_motion_event (seat->drop,
                               FALSE,
-                              seat->pointer_info.surface_x,
-                              seat->pointer_info.surface_y,
+                              origin_x + seat->pointer_info.surface_x,
+                              origin_y + seat->pointer_info.surface_y,
                               time);
 }
 
@@ -1320,14 +1323,17 @@ data_device_drop (void                  *data,
                   struct wl_data_device *data_device)
 {
   GdkWaylandSeat *seat = data;
+  int origin_x, origin_y;
 
   GDK_DISPLAY_NOTE (seat->display, EVENTS,
             g_message ("data device drop, data device %p", data_device));
 
+  gdk_surface_get_origin (gdk_drop_get_surface (seat->drop), &origin_x, &origin_y);
+
   gdk_drop_emit_drop_event (seat->drop,
                             FALSE,
-                            seat->pointer_info.surface_x,
-                            seat->pointer_info.surface_y,
+                            origin_x + seat->pointer_info.surface_x,
+                            origin_y + seat->pointer_info.surface_y,
                             GDK_CURRENT_TIME);
 }