[gtk+] wayland: Transform moved_to_rect result properly

[Jonas Ådahl <jadahl src gnome org>]

commit d792400d7c258b349c1dbaed0a12eee796a4b958
Author: Jonas Ådahl <jadahl gmail com>
Date:   Mon Sep 12 18:41:36 2016 +0800

    wayland: Transform moved_to_rect result properly
    
    The result of move_to_rect, received from the xdg_popup.configure
    event, needs to be translated to the correct coordinate space; that is
    from real parent window geometry to coordinates relative to the gdk
    window set as transient-for.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=771117

 gdk/wayland/gdkwindow-wayland.c |   33 ++++++++++++++++++++++-----------
 1 files changed, 22 insertions(+), 11 deletions(-)
---
diff --git a/gdk/wayland/gdkwindow-wayland.c b/gdk/wayland/gdkwindow-wayland.c
index 17cfed5..4c6f38d 100644
--- a/gdk/wayland/gdkwindow-wayland.c
+++ b/gdk/wayland/gdkwindow-wayland.c
@@ -1640,6 +1640,21 @@ translate_to_real_parent_window_geometry (GdkWindow  *window,
 }
 
 static void
+translate_from_real_parent_window_geometry (GdkWindow *window,
+                                            gint      *x,
+                                            gint      *y)
+{
+  GdkWindow *parent;
+  gint dx = 0;
+  gint dy = 0;
+
+  parent = get_real_parent_and_translate (window, &dx, &dy);
+
+  *x -= dx - parent->shadow_left;
+  *y -= dy - parent->shadow_top;
+}
+
+static void
 calculate_popup_rect (GdkWindow    *window,
                       GdkGravity    rect_anchor,
                       GdkGravity    window_anchor,
@@ -1822,24 +1837,20 @@ calculate_moved_to_rect_result (GdkWindow    *window,
 {
   GdkWindowImplWayland *impl = GDK_WINDOW_IMPL_WAYLAND (window->impl);
   GdkRectangle best_rect;
-  GdkRectangle geometry;
 
-  x += impl->transient_for->shadow_left;
-  y += impl->transient_for->shadow_top;
+  translate_from_real_parent_window_geometry (window, &x, &y);
+  *final_rect = (GdkRectangle) {
+    .x = x,
+    .y = y,
+    .width = width,
+    .height = height,
+  };
 
   calculate_popup_rect (window,
                         impl->pending_move_to_rect.rect_anchor,
                         impl->pending_move_to_rect.window_anchor,
                         &best_rect);
 
-  gdk_wayland_window_get_window_geometry (window, &geometry);
-  *final_rect = (GdkRectangle) {
-    .x = x,
-    .y = y,
-    .width = geometry.width,
-    .height = geometry.height
-  };
-
   *flipped_rect = best_rect;
 
   if (x != best_rect.x &&