Replace Clutter.Seat.bell_notify with Meta.SoundPlayer

Author: leolost2605

src/InternalUtils.vala

@@ -369,5 +369,9 @@ namespace Gala {
                 }
             });
         }
+
+        public static void bell_notify (Meta.Display display) {
+            display.get_sound_player ().play_from_theme ("bell-window-system", _("Bell Event"), null);
+        }
     }
 }

src/Widgets/WindowCloneContainer.vala

@@ -340,7 +340,7 @@ namespace Gala {
 
             if (closest == null) {
                 if (current_window != null) {
-                    Clutter.get_default_backend ().get_default_seat ().bell_notify ();
+                    InternalUtils.bell_notify (display);
                     current_window.active = true;
                 }
                 return;

src/Widgets/WindowSwitcher/WindowSwitcher.vala

@@ -377,7 +377,7 @@ public class Gala.WindowSwitcher : CanvasActor {
 
     private void open_switcher () {
         if (container.get_n_children () == 0) {
-            Clutter.get_default_backend ().get_default_seat ().bell_notify ();
+            InternalUtils.bell_notify (wm.get_display ());
             return;
         }
 
@@ -473,7 +473,7 @@ public class Gala.WindowSwitcher : CanvasActor {
         Clutter.Actor actor;
 
         if (container.get_n_children () == 1 && current_icon != null) {
-            Clutter.get_default_backend ().get_default_seat ().bell_notify ();
+            InternalUtils.bell_notify (wm.get_display ());
             return;
         }
 

src/WindowManager.vala

@@ -477,7 +477,7 @@ namespace Gala {
             if (active_workspace_index != index) {
                 manager.get_workspace_by_index (index).activate (event.get_time ());
             } else {
-                Clutter.get_default_backend ().get_default_seat ().bell_notify ();
+                InternalUtils.bell_notify (display);
             }
         }
 
@@ -787,13 +787,13 @@ namespace Gala {
 
             // don't allow empty workspaces to be created by moving, if we have dynamic workspaces
             if (Meta.Prefs.get_dynamic_workspaces () && Utils.get_n_windows (active) == 1 && workspace.index () == manager.n_workspaces - 1) {
-                Clutter.get_default_backend ().get_default_seat ().bell_notify ();
+                InternalUtils.bell_notify (display);
                 return;
             }
 
             // don't allow moving into non-existing workspaces
             if (active == workspace) {
-                Clutter.get_default_backend ().get_default_seat ().bell_notify ();
+                InternalUtils.bell_notify (display);
                 return;
             }
 

src/Zoom.vala

@@ -141,7 +141,7 @@ public class Gala.Zoom : Object {
         // Nothing to do if zooming out of our bounds is requested
         if ((current_zoom <= MIN_ZOOM && delta < 0) || (current_zoom >= MAX_ZOOM && delta >= 0)) {
             if (play_sound) {
-                Clutter.get_default_backend ().get_default_seat ().bell_notify ();
+                InternalUtils.bell_notify (wm.get_display ());
             }
             return;
         }