[gtk/gtk-3-24: 4/6] wayland: Respond to server_decoration.mode events

[Jonas Ådahl <jadahl src gnome org>]

commit f62c92783a604f453228e1fd6287910514401126
Author: David Edmundson <kde davidedmundson co uk>
Date:   Thu Jun 28 18:09:47 2018 +0100

    wayland: Respond to server_decoration.mode events

 gdk/wayland/gdkwindow-wayland.c | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)
---
diff --git a/gdk/wayland/gdkwindow-wayland.c b/gdk/wayland/gdkwindow-wayland.c
index 9ae45231ae..0e2b66e6e8 100644
--- a/gdk/wayland/gdkwindow-wayland.c
+++ b/gdk/wayland/gdkwindow-wayland.c
@@ -259,6 +259,7 @@ static void calculate_moved_to_rect_result (GdkWindow    *window,
 
 static gboolean gdk_wayland_window_is_exported (GdkWindow *window);
 static void gdk_wayland_window_unexport (GdkWindow *window);
+static void gdk_wayland_window_announce_decoration_mode (GdkWindow *window);
 
 GType _gdk_window_impl_wayland_get_type (void);
 
@@ -2068,6 +2069,21 @@ window_anchor_to_gravity_legacy (GdkGravity rect_anchor)
     }
 }
 
+static void
+kwin_server_decoration_mode_set (void *data, struct org_kde_kwin_server_decoration 
*org_kde_kwin_server_decoration, uint32_t mode)
+{
+  GdkWindow *window = GDK_WINDOW (data);
+  GdkWindowImplWayland *impl = GDK_WINDOW_IMPL_WAYLAND (window->impl);
+
+  if ((mode == ORG_KDE_KWIN_SERVER_DECORATION_MODE_SERVER && impl->using_csd) ||
+        (mode == ORG_KDE_KWIN_SERVER_DECORATION_MODE_CLIENT && !impl->using_csd))
+    gdk_wayland_window_announce_decoration_mode (window);
+}
+
+static const struct org_kde_kwin_server_decoration_listener kwin_server_decoration_listener = {
+  kwin_server_decoration_mode_set
+};
+
 static void
 gdk_wayland_window_announce_decoration_mode (GdkWindow *window)
 {
@@ -2077,9 +2093,15 @@ gdk_wayland_window_announce_decoration_mode (GdkWindow *window)
   if (!display_wayland->server_decoration_manager)
     return;
   if (!impl->display_server.server_decoration)
-    impl->display_server.server_decoration =
-      org_kde_kwin_server_decoration_manager_create (display_wayland->server_decoration_manager,
-                                                                                       
impl->display_server.wl_surface);
+    {
+      impl->display_server.server_decoration =
+        org_kde_kwin_server_decoration_manager_create (display_wayland->server_decoration_manager,
+                                                                                         
impl->display_server.wl_surface);
+      org_kde_kwin_server_decoration_add_listener (impl->display_server.server_decoration,
+                                                                                
&kwin_server_decoration_listener,
+                                                                                window);
+  }
+
   if (impl->display_server.server_decoration)
     {
       if (impl->using_csd)