window-x11: Cleanup header and shuffle function locations

The functions meta_window_x11_create_sync_request_alarm() and
meta_window_x11_destroy_sync_request_alarm() are not used outside
MetaWindowX11 now, and don't need to be exposed in window-x11.h

Remove them from window-x11.h and shuffle these functions to
before their first usage, to avoid having to add their prototypes.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/372

src/backends/x11/meta-backend-x11.c

@@ -52,6 +52,7 @@
 #include "compositor/compositor-private.h"
 #include "core/display-private.h"
 #include "meta/meta-cursor-tracker.h"
+#include "meta/meta-x11-errors.h"
 #include "meta/util.h"
 
 struct _MetaBackendX11Private
@@ -598,6 +599,10 @@ meta_backend_x11_warp_pointer (MetaBackend *backend,
 {
   MetaBackendX11 *x11 = META_BACKEND_X11 (backend);
   MetaBackendX11Private *priv = meta_backend_x11_get_instance_private (x11);
+  MetaDisplay *display = meta_get_display ();
+
+  if (display)
+    meta_x11_error_trap_push (display->x11_display);
 
   XIWarpPointer (priv->xdisplay,
                  META_VIRTUAL_CORE_POINTER_ID,
@@ -605,6 +610,10 @@ meta_backend_x11_warp_pointer (MetaBackend *backend,
                  meta_backend_x11_get_xwindow (x11),
                  0, 0, 0, 0,
                  x, y);
+
+  if (display &&
+      meta_x11_error_trap_pop_with_return (display->x11_display) != Success)
+    meta_verbose ("Failed to warp pointer\n");
 }
 
 static MetaLogicalMonitor *

src/compositor/meta-window-actor-x11.c

@@ -30,6 +30,7 @@
 #include "meta/meta-x11-errors.h"
 #include "meta/window.h"
 #include "x11/meta-x11-display-private.h"
+#include "x11/window-x11.h"
 
 struct _MetaWindowActorX11
 {
@@ -366,9 +367,12 @@ meta_window_actor_x11_queue_frame_drawn (MetaWindowActor *actor,
   if (meta_window_actor_is_destroyed (actor))
     return;
 
+  g_assert (META_IS_WINDOW_X11 (window));
+
   frame = g_slice_new0 (FrameData);
   frame->frame_counter = -1;
-  frame->sync_request_serial = window->sync_request_serial;
+  frame->sync_request_serial =
+    meta_window_x11_get_sync_request_serial (META_WINDOW_X11 (window));
 
   actor_x11->frames = g_list_prepend (actor_x11->frames, frame);
 
@@ -485,13 +489,14 @@ meta_window_actor_x11_constructed (GObject *object)
   MetaWindowActor *window_actor = META_WINDOW_ACTOR (object);
   MetaWindow *window =
     meta_window_actor_get_meta_window (window_actor);
+  MetaWindowX11 *window_x11 = META_WINDOW_X11 (window);
 
   G_OBJECT_CLASS (meta_window_actor_x11_parent_class)->constructed (object);
 
   /* If a window doesn't start off with updates frozen, we should
    * we should send a _NET_WM_FRAME_DRAWN immediately after the first drawn.
    */
-  if (window->extended_sync_request_counter &&
+  if (meta_window_x11_has_extended_sync_request_counter (window_x11) &&
       !meta_window_updates_are_frozen (window))
     meta_window_actor_queue_frame_drawn (window_actor, FALSE);
 }

src/core/window-private.h

@@ -403,9 +403,6 @@ struct _MetaWindow
   /* if TRUE we have a grab on the focus click buttons */
   guint have_focus_click_grab : 1;
 
-  /* if TRUE, application is buggy and SYNC resizing is turned off */
-  guint disable_sync : 1;
-
   /* if TRUE, window is attached to its parent */
   guint attached : 1;
 
@@ -431,21 +428,9 @@ struct _MetaWindow
   /* _NET_WM_WINDOW_OPACITY rescaled to 0xFF */
   guint8 opacity;
 
-  /* if TRUE, the we have the new form of sync request counter which
-   * also handles application frames */
-  guint extended_sync_request_counter : 1;
-
   /* Note: can be NULL */
   GSList *struts;
 
-  /* XSync update counter */
-  XSyncCounter sync_request_counter;
-  gint64 sync_request_serial;
-  gint64 sync_request_wait_serial;
-  guint sync_request_timeout_id;
-  /* alarm monitoring client's _NET_WM_SYNC_REQUEST_COUNTER */
-  XSyncAlarm sync_request_alarm;
-
   /* Number of UnmapNotify that are caused by us, if
    * we get UnmapNotify with none pending then the client
    * is withdrawing the window.
@@ -532,6 +517,8 @@ struct _MetaWindowClass
 
   void (*manage)                 (MetaWindow *window);
   void (*unmanage)               (MetaWindow *window);
+  void (*map)                    (MetaWindow *window);
+  void (*unmap)                  (MetaWindow *window);
   void (*ping)                   (MetaWindow *window,
                                   guint32     serial);
   void (*delete)                 (MetaWindow *window,
@@ -570,6 +557,7 @@ struct _MetaWindowClass
   gboolean (*is_stackable)        (MetaWindow *window);
   gboolean (*can_ping)            (MetaWindow *window);
   gboolean (*are_updates_frozen)  (MetaWindow *window);
+  gboolean (*has_pointer)         (MetaWindow *window);
 };
 
 /* These differ from window->has_foo_func in that they consider

src/core/window.c

@@ -82,7 +82,6 @@
 #include "meta/group.h"
 #include "meta/meta-cursor-tracker.h"
 #include "meta/meta-enum-types.h"
-#include "meta/meta-x11-errors.h"
 #include "meta/prefs.h"
 #include "ui/ui.h"
 #include "x11/meta-x11-display-private.h"
@@ -799,6 +798,7 @@ client_window_should_be_mapped (MetaWindow *window)
 static void
 sync_client_window_mapped (MetaWindow *window)
 {
+  MetaWindowClass *window_class = META_WINDOW_GET_CLASS (window);
   gboolean should_be_mapped = client_window_should_be_mapped (window);
 
   g_return_if_fail (!window->override_redirect);
@@ -808,17 +808,15 @@ sync_client_window_mapped (MetaWindow *window)
 
   window->mapped = should_be_mapped;
 
-  meta_x11_error_trap_push (window->display->x11_display);
   if (should_be_mapped)
     {
-      XMapWindow (window->display->x11_display->xdisplay, window->xwindow);
+      window_class->map (window);
     }
   else
     {
-      XUnmapWindow (window->display->x11_display->xdisplay, window->xwindow);
+      window_class->unmap (window);
       window->unmaps_pending ++;
     }
-  meta_x11_error_trap_pop (window->display->x11_display);
 }
 
 static gboolean
@@ -999,11 +997,6 @@ _meta_window_shared_new (MetaDisplay         *display,
 
   window->workspace = NULL;
 
-  window->sync_request_counter = None;
-  window->sync_request_serial = 0;
-  window->sync_request_timeout_id = 0;
-  window->sync_request_alarm = None;
-
   meta_window_update_sandboxed_app_id (window);
   meta_window_update_desc (window);
 
@@ -1083,7 +1076,6 @@ _meta_window_shared_new (MetaDisplay         *display,
   window->calc_placement = FALSE;
   window->shaken_loose = FALSE;
   window->have_focus_click_grab = FALSE;
-  window->disable_sync = FALSE;
 
   window->unmaps_pending = 0;
 
@@ -1528,12 +1520,6 @@ meta_window_unmanage (MetaWindow  *window,
       invalidate_work_areas (window);
     }
 
-  if (window->sync_request_timeout_id)
-    {
-      g_source_remove (window->sync_request_timeout_id);
-      window->sync_request_timeout_id = 0;
-    }
-
   if (window->display->grab_window == window)
     meta_display_end_grab_op (window->display, timestamp);
 
@@ -5948,8 +5934,8 @@ check_moveresize_frequency (MetaWindow *window,
 
   /* If we are throttling via _NET_WM_SYNC_REQUEST, we don't need
    * an artificial timeout-based throttled */
-  if (!window->disable_sync &&
-      window->sync_request_alarm != None)
+  if (window->client_type == META_WINDOW_CLIENT_TYPE_X11 &&
+      meta_window_x11_has_sync_request_alarm (META_WINDOW_X11 (window)))
     return TRUE;
 
   elapsed = time_diff (&current_time, &window->display->grab_last_moveresize_time);
@@ -6311,7 +6297,8 @@ update_resize (MetaWindow *window,
    * resize the window when the window responds, or when we time
    * the response out.
    */
-  if (window->sync_request_timeout_id != 0)
+  if (window->client_type == META_WINDOW_CLIENT_TYPE_X11 &&
+      meta_window_x11_is_sync_request_scheduled (META_WINDOW_X11 (window)))
     return;
 
   if (!check_moveresize_frequency (window, &remaining) && !force)
@@ -6823,7 +6810,7 @@ meta_window_is_ancestor_of_transient (MetaWindow *window,
 /* Warp pointer to location appropriate for grab,
  * return root coordinates where pointer ended up.
  */
-static gboolean
+static void
 warp_grab_pointer (MetaWindow          *window,
                    MetaGrabOp           grab_op,
                    int                 *x,
@@ -6864,8 +6851,6 @@ warp_grab_pointer (MetaWindow          *window,
   *x = CLAMP (*x, 0, display_rect.width - 1);
   *y = CLAMP (*y, 0, display_rect.height - 1);
 
-  meta_x11_error_trap_push (display->x11_display);
-
   meta_topic (META_DEBUG_WINDOW_OPS,
               "Warping pointer to %d,%d with window at %d,%d\n",
               *x, *y, rect.x, rect.y);
@@ -6881,19 +6866,8 @@ warp_grab_pointer (MetaWindow          *window,
   meta_window_get_frame_rect (window,
                               &display->grab_anchor_window_pos);
 
-  {
-    MetaBackend *backend = meta_get_backend ();
-    meta_backend_warp_pointer (backend, *x, *y);
-  }
 
-  if (meta_x11_error_trap_pop_with_return (display->x11_display) != Success)
-    {
-      meta_verbose ("Failed to warp pointer for window %s\n",
-                    window->desc);
-      return FALSE;
-    }
-
-  return TRUE;
+  meta_backend_warp_pointer (meta_get_backend (), *x, *y);
 }
 
 void
@@ -8118,51 +8092,10 @@ mouse_mode_focus (MetaWindow  *window,
     }
 }
 
-static gboolean
-window_has_pointer_wayland (MetaWindow *window)
-{
-  ClutterDeviceManager *dm;
-  ClutterInputDevice *dev;
-  ClutterActor *pointer_actor, *window_actor;
-
-  dm = clutter_device_manager_get_default ();
-  dev = clutter_device_manager_get_core_device (dm, CLUTTER_POINTER_DEVICE);
-  pointer_actor = clutter_input_device_get_pointer_actor (dev);
-  window_actor = CLUTTER_ACTOR (meta_window_get_compositor_private (window));
-
-  return pointer_actor && clutter_actor_contains (window_actor, pointer_actor);
-}
-
-static gboolean
-window_has_pointer_x11 (MetaWindow *window)
-{
-  MetaX11Display *x11_display = window->display->x11_display;
-  Window root, child;
-  double root_x, root_y, x, y;
-  XIButtonState buttons;
-  XIModifierState mods;
-  XIGroupState group;
-
-  meta_x11_error_trap_push (x11_display);
-  XIQueryPointer (x11_display->xdisplay,
-                  META_VIRTUAL_CORE_POINTER_ID,
-                  x11_display->xroot,
-                  &root, &child,
-                  &root_x, &root_y, &x, &y,
-                  &buttons, &mods, &group);
-  meta_x11_error_trap_pop (x11_display);
-  free (buttons.mask);
-
-  return meta_x11_display_lookup_x_window (x11_display, child) == window;
-}
-
 gboolean
 meta_window_has_pointer (MetaWindow *window)
 {
-  if (meta_is_wayland_compositor ())
-    return window_has_pointer_wayland (window);
-  else
-    return window_has_pointer_x11 (window);
+  return META_WINDOW_GET_CLASS (window)->has_pointer (window);
 }
 
 static gboolean

src/wayland/meta-window-wayland.c

@@ -111,6 +111,16 @@ meta_window_wayland_unmanage (MetaWindow *window)
   meta_display_unregister_wayland_window (window->display, window);
 }
 
+static void
+meta_window_wayland_map (MetaWindow *window)
+{
+}
+
+static void
+meta_window_wayland_unmap (MetaWindow *window)
+{
+}
+
 static void
 meta_window_wayland_ping (MetaWindow *window,
                           guint32     serial)
@@ -611,6 +621,21 @@ meta_window_wayland_are_updates_frozen (MetaWindow *window)
   return !wl_window->has_been_shown;
 }
 
+static gboolean
+meta_window_wayland_has_pointer (MetaWindow *window)
+{
+  ClutterDeviceManager *dm;
+  ClutterInputDevice *dev;
+  ClutterActor *pointer_actor, *window_actor;
+
+  dm = clutter_device_manager_get_default ();
+  dev = clutter_device_manager_get_core_device (dm, CLUTTER_POINTER_DEVICE);
+  pointer_actor = clutter_input_device_get_pointer_actor (dev);
+  window_actor = CLUTTER_ACTOR (meta_window_get_compositor_private (window));
+
+  return pointer_actor && clutter_actor_contains (window_actor, pointer_actor);
+}
+
 static void
 meta_window_wayland_class_init (MetaWindowWaylandClass *klass)
 {
@@ -618,6 +643,8 @@ meta_window_wayland_class_init (MetaWindowWaylandClass *klass)
 
   window_class->manage = meta_window_wayland_manage;
   window_class->unmanage = meta_window_wayland_unmanage;
+  window_class->map = meta_window_wayland_map;
+  window_class->unmap = meta_window_wayland_unmap;
   window_class->ping = meta_window_wayland_ping;
   window_class->delete = meta_window_wayland_delete;
   window_class->kill = meta_window_wayland_kill;
@@ -634,6 +661,7 @@ meta_window_wayland_class_init (MetaWindowWaylandClass *klass)
   window_class->is_stackable = meta_window_wayland_is_stackable;
   window_class->can_ping = meta_window_wayland_can_ping;
   window_class->are_updates_frozen = meta_window_wayland_are_updates_frozen;
+  window_class->has_pointer = meta_window_wayland_has_pointer;
 }
 
 MetaWindow *

src/wayland/meta-window-xwayland.c

@@ -71,6 +71,21 @@ meta_window_xwayland_shortcuts_inhibited (MetaWindow         *window,
   return meta_wayland_compositor_is_shortcuts_inhibited (compositor, source);
 }
 
+static gboolean
+meta_window_xwayland_has_pointer (MetaWindow *window)
+{
+  ClutterDeviceManager *dm;
+  ClutterInputDevice *dev;
+  ClutterActor *pointer_actor, *window_actor;
+
+  dm = clutter_device_manager_get_default ();
+  dev = clutter_device_manager_get_core_device (dm, CLUTTER_POINTER_DEVICE);
+  pointer_actor = clutter_input_device_get_pointer_actor (dev);
+  window_actor = CLUTTER_ACTOR (meta_window_get_compositor_private (window));
+
+  return pointer_actor && clutter_actor_contains (window_actor, pointer_actor);
+}
+
 static void
 meta_window_xwayland_get_property (GObject    *object,
                                    guint       prop_id,
@@ -117,6 +132,7 @@ meta_window_xwayland_class_init (MetaWindowXwaylandClass *klass)
 
   window_class->force_restore_shortcuts = meta_window_xwayland_force_restore_shortcuts;
   window_class->shortcuts_inhibited = meta_window_xwayland_shortcuts_inhibited;
+  window_class->has_pointer = meta_window_xwayland_has_pointer;
 
   gobject_class->get_property = meta_window_xwayland_get_property;
   gobject_class->set_property = meta_window_xwayland_set_property;

src/x11/window-props.c

@@ -1068,34 +1068,9 @@ reload_update_counter (MetaWindow    *window,
                        MetaPropValue *value,
                        gboolean       initial)
 {
-  if (value->type != META_PROP_VALUE_INVALID)
-    {
-      meta_window_x11_destroy_sync_request_alarm (window);
-      window->sync_request_counter = None;
+  MetaWindowX11 *window_x11 = META_WINDOW_X11 (window);
 
-      if (value->v.xcounter_list.n_counters == 0)
-        {
-          meta_warning ("_NET_WM_SYNC_REQUEST_COUNTER is empty\n");
-          return;
-        }
-
-      if (value->v.xcounter_list.n_counters == 1)
-        {
-          window->sync_request_counter = value->v.xcounter_list.counters[0];
-          window->extended_sync_request_counter = FALSE;
-        }
-      else
-        {
-          window->sync_request_counter = value->v.xcounter_list.counters[1];
-          window->extended_sync_request_counter = TRUE;
-        }
-      meta_verbose ("Window has _NET_WM_SYNC_REQUEST_COUNTER 0x%lx (extended=%s)\n",
-                    window->sync_request_counter,
-                    window->extended_sync_request_counter ? "true" : "false");
-
-      if (window->extended_sync_request_counter)
-        meta_window_x11_create_sync_request_alarm (window);
-    }
+  meta_window_x11_setup_sync_request_counter (window_x11, value);
 }
 
 #define FLAG_TOGGLED_ON(old,new,flag) \

src/x11/window-x11-private.h

@@ -25,6 +25,8 @@
 
 #include "core/window-private.h"
 #include "x11/iconcache.h"
+#include "x11/window-x11.h"
+#include "x11/xprops.h"
 
 G_BEGIN_DECLS
 
@@ -72,8 +74,28 @@ struct _MetaWindowX11Private
   MetaIconCache icon_cache;
   Pixmap wm_hints_pixmap;
   Pixmap wm_hints_mask;
+
+  /* alarm monitoring client's _NET_WM_SYNC_REQUEST_COUNTER */
+  XSyncAlarm sync_request_alarm;
+
+  /* XSync update counter */
+  XSyncCounter sync_request_counter;
+
+  int64_t sync_request_serial;
+  int64_t sync_request_wait_serial;
+  guint sync_request_timeout_id;
+
+  /* if TRUE, application is buggy and SYNC resizing is turned off */
+  gboolean disable_sync;
+
+  /* if TRUE, the we have the new form of sync request counter which
+   * also handles application frames */
+  gboolean extended_sync_request_counter;
 };
 
+void meta_window_x11_setup_sync_request_counter (MetaWindowX11 *window_x11,
+                                                 MetaPropValue *value);
+
 G_END_DECLS
 
 #endif

src/x11/window-x11.c

@@ -510,6 +510,97 @@ meta_window_apply_session_info (MetaWindow *window,
     }
 }
 
+static void
+meta_window_x11_create_sync_request_alarm (MetaWindow *window)
+{
+  MetaWindowX11 *window_x11 = META_WINDOW_X11 (window);
+  MetaWindowX11Private *priv =
+    meta_window_x11_get_instance_private (window_x11);
+  MetaX11Display *x11_display = window->display->x11_display;
+  XSyncAlarmAttributes values;
+  XSyncValue init;
+
+  if (priv->sync_request_counter == None ||
+      priv->sync_request_alarm != None)
+    return;
+
+  meta_x11_error_trap_push (x11_display);
+
+  /* In the new (extended style), the counter value is initialized by
+   * the client before mapping the window. In the old style, we're
+   * responsible for setting the initial value of the counter.
+   */
+  if (priv->extended_sync_request_counter)
+    {
+      if (!XSyncQueryCounter(x11_display->xdisplay,
+                             priv->sync_request_counter,
+                             &init))
+        {
+          meta_x11_error_trap_pop_with_return (x11_display);
+          priv->sync_request_counter = None;
+          return;
+        }
+
+      priv->sync_request_serial =
+        XSyncValueLow32 (init) + ((gint64)XSyncValueHigh32 (init) << 32);
+    }
+  else
+    {
+      XSyncIntToValue (&init, 0);
+      XSyncSetCounter (x11_display->xdisplay,
+                       priv->sync_request_counter, init);
+      priv->sync_request_serial = 0;
+    }
+
+  values.trigger.counter = priv->sync_request_counter;
+  values.trigger.test_type = XSyncPositiveComparison;
+
+  /* Initialize to one greater than the current value */
+  values.trigger.value_type = XSyncRelative;
+  XSyncIntToValue (&values.trigger.wait_value, 1);
+
+  /* After triggering, increment test_value by this until
+   * until the test condition is false */
+  XSyncIntToValue (&values.delta, 1);
+
+  /* we want events (on by default anyway) */
+  values.events = True;
+
+  priv->sync_request_alarm = XSyncCreateAlarm (x11_display->xdisplay,
+                                               XSyncCACounter |
+                                               XSyncCAValueType |
+                                               XSyncCAValue |
+                                               XSyncCATestType |
+                                               XSyncCADelta |
+                                               XSyncCAEvents,
+                                               &values);
+
+  if (meta_x11_error_trap_pop_with_return (x11_display) == Success)
+    meta_x11_display_register_sync_alarm (x11_display, &priv->sync_request_alarm, window);
+  else
+    {
+      priv->sync_request_alarm = None;
+      priv->sync_request_counter = None;
+    }
+}
+
+static void
+meta_window_x11_destroy_sync_request_alarm (MetaWindow *window)
+{
+  MetaWindowX11Private *priv =
+    meta_window_x11_get_instance_private (META_WINDOW_X11 (window));
+  MetaX11Display *x11_display = window->display->x11_display;
+
+  if (priv->sync_request_alarm != None)
+    {
+      /* Has to be unregistered _before_ clearing the structure field */
+      meta_x11_display_unregister_sync_alarm (x11_display, priv->sync_request_alarm);
+      XSyncDestroyAlarm (x11_display->xdisplay,
+                         priv->sync_request_alarm);
+      priv->sync_request_alarm = None;
+    }
+}
+
 static void
 meta_window_x11_manage (MetaWindow *window)
 {
@@ -588,6 +679,12 @@ meta_window_x11_unmanage (MetaWindow *window)
   MetaWindowX11 *window_x11 = META_WINDOW_X11 (window);
   MetaWindowX11Private *priv = meta_window_x11_get_instance_private (window_x11);
 
+  if (priv->sync_request_timeout_id)
+    {
+      g_source_remove (priv->sync_request_timeout_id);
+      priv->sync_request_timeout_id = 0;
+    }
+
   meta_x11_error_trap_push (x11_display);
 
   meta_window_x11_destroy_sync_request_alarm (window);
@@ -703,6 +800,28 @@ meta_window_x11_can_ping (MetaWindow *window)
   return priv->wm_ping;
 }
 
+static void
+meta_window_x11_map (MetaWindow *window)
+{
+  meta_x11_error_trap_push (window->display->x11_display);
+
+  XMapWindow (window->display->x11_display->xdisplay,
+              window->xwindow);
+
+  meta_x11_error_trap_pop (window->display->x11_display);
+}
+
+static void
+meta_window_x11_unmap (MetaWindow *window)
+{
+  meta_x11_error_trap_push (window->display->x11_display);
+
+  XUnmapWindow (window->display->x11_display->xdisplay,
+                window->xwindow);
+
+  meta_x11_error_trap_pop (window->display->x11_display);
+}
+
 static void
 meta_window_x11_ping (MetaWindow *window,
                       guint32     serial)
@@ -895,7 +1014,7 @@ meta_window_x11_grab_op_began (MetaWindow *window,
 
   if (meta_grab_op_is_resizing (op))
     {
-      if (window->sync_request_counter != None)
+      if (priv->sync_request_counter != None)
         meta_window_x11_create_sync_request_alarm (window);
 
       if (window->size_hints.width_inc > 2 || window->size_hints.height_inc > 2)
@@ -1038,18 +1157,20 @@ static gboolean
 sync_request_timeout (gpointer data)
 {
   MetaWindow *window = data;
+  MetaWindowX11Private *priv =
+    meta_window_x11_get_instance_private (META_WINDOW_X11 (window));
 
-  window->sync_request_timeout_id = 0;
+  priv->sync_request_timeout_id = 0;
 
   /* We have now waited for more than a second for the
    * application to respond to the sync request
    */
-  window->disable_sync = TRUE;
+  priv->disable_sync = TRUE;
 
   /* Reset the wait serial, so we don't continue freezing
    * window updates
    */
-  window->sync_request_wait_serial = 0;
+  priv->sync_request_wait_serial = 0;
   meta_compositor_sync_updates_frozen (window->display->compositor, window);
 
   if (window == window->display->grab_window &&
@@ -1068,6 +1189,9 @@ sync_request_timeout (gpointer data)
 static void
 send_sync_request (MetaWindow *window)
 {
+  MetaWindowX11 *window_x11 = META_WINDOW_X11 (window);
+  MetaWindowX11Private *priv =
+    meta_window_x11_get_instance_private (window_x11);
   MetaX11Display *x11_display = window->display->x11_display;
   XClientMessageEvent ev;
   gint64 wait_serial;
@@ -1079,9 +1203,9 @@ send_sync_request (MetaWindow *window)
    * for the old style. The increment of 240 is specified by the EWMH
    * and is (1 second) * (60fps) * (an increment of 4 per frame).
    */
-  wait_serial = window->sync_request_serial + 240;
+  wait_serial = priv->sync_request_serial + 240;
 
-  window->sync_request_wait_serial = wait_serial;
+  priv->sync_request_wait_serial = wait_serial;
 
   ev.type = ClientMessage;
   ev.window = window->xwindow;
@@ -1096,7 +1220,7 @@ send_sync_request (MetaWindow *window)
   ev.data.l[1] = meta_display_get_current_time (window->display);
   ev.data.l[2] = wait_serial & G_GUINT64_CONSTANT(0xffffffff);
   ev.data.l[3] = wait_serial >> 32;
-  ev.data.l[4] = window->extended_sync_request_counter ? 1 : 0;
+  ev.data.l[4] = priv->extended_sync_request_counter ? 1 : 0;
 
   /* We don't need to trap errors here as we are already
    * inside an error_trap_push()/pop() pair.
@@ -1108,10 +1232,10 @@ send_sync_request (MetaWindow *window)
    * if this time expires, we consider the window unresponsive
    * and resize it unsynchonized.
    */
-  window->sync_request_timeout_id = g_timeout_add (1000,
-                                                   sync_request_timeout,
-                                                   window);
-  g_source_set_name_by_id (window->sync_request_timeout_id,
+  priv->sync_request_timeout_id = g_timeout_add (1000,
+                                                 sync_request_timeout,
+                                                 window);
+  g_source_set_name_by_id (priv->sync_request_timeout_id,
                            "[mutter] sync_request_timeout");
 
   meta_compositor_sync_updates_frozen (window->display->compositor, window);
@@ -1329,7 +1453,7 @@ meta_window_x11_move_resize_internal (MetaWindow                *window,
    * will be left undisturbed for us to paint to the screen until
    * the client finishes redrawing.
    */
-  if (window->extended_sync_request_counter)
+  if (priv->extended_sync_request_counter)
     configure_frame_first = TRUE;
   else
     configure_frame_first = size_dx + size_dy >= 0;
@@ -1357,10 +1481,10 @@ meta_window_x11_move_resize_internal (MetaWindow                *window,
 
       if (window == window->display->grab_window &&
           meta_grab_op_is_resizing (window->display->grab_op) &&
-          !window->disable_sync &&
-          window->sync_request_counter != None &&
-          window->sync_request_alarm != None &&
-          window->sync_request_timeout_id == 0)
+          !priv->disable_sync &&
+          priv->sync_request_counter != None &&
+          priv->sync_request_alarm != None &&
+          priv->sync_request_timeout_id == 0)
         {
           send_sync_request (window);
         }
@@ -1696,16 +1820,43 @@ meta_window_x11_is_stackable (MetaWindow *window)
 static gboolean
 meta_window_x11_are_updates_frozen (MetaWindow *window)
 {
-  if (window->extended_sync_request_counter &&
-      window->sync_request_serial % 2 == 1)
+  MetaWindowX11 *window_x11 = META_WINDOW_X11 (window);
+  MetaWindowX11Private *priv =
+    meta_window_x11_get_instance_private (window_x11);
+
+  if (priv->extended_sync_request_counter &&
+      priv->sync_request_serial % 2 == 1)
     return TRUE;
 
-  if (window->sync_request_serial < window->sync_request_wait_serial)
+  if (priv->sync_request_serial < priv->sync_request_wait_serial)
     return TRUE;
 
   return FALSE;
 }
 
+static gboolean
+meta_window_x11_has_pointer (MetaWindow *window)
+{
+  MetaX11Display *x11_display = window->display->x11_display;
+  Window root, child;
+  double root_x, root_y, x, y;
+  XIButtonState buttons;
+  XIModifierState mods;
+  XIGroupState group;
+
+  meta_x11_error_trap_push (x11_display);
+  XIQueryPointer (x11_display->xdisplay,
+                  META_VIRTUAL_CORE_POINTER_ID,
+                  x11_display->xroot,
+                  &root, &child,
+                  &root_x, &root_y, &x, &y,
+                  &buttons, &mods, &group);
+  meta_x11_error_trap_pop (x11_display);
+  free (buttons.mask);
+
+  return meta_x11_display_lookup_x_window (x11_display, child) == window;
+}
+
 static void
 meta_window_x11_class_init (MetaWindowX11Class *klass)
 {
@@ -1713,6 +1864,8 @@ meta_window_x11_class_init (MetaWindowX11Class *klass)
 
   window_class->manage = meta_window_x11_manage;
   window_class->unmanage = meta_window_x11_unmanage;
+  window_class->map = meta_window_x11_map;
+  window_class->unmap = meta_window_x11_unmap;
   window_class->ping = meta_window_x11_ping;
   window_class->delete = meta_window_x11_delete;
   window_class->kill = meta_window_x11_kill;
@@ -1733,6 +1886,7 @@ meta_window_x11_class_init (MetaWindowX11Class *klass)
   window_class->is_stackable = meta_window_x11_is_stackable;
   window_class->can_ping = meta_window_x11_can_ping;
   window_class->are_updates_frozen = meta_window_x11_are_updates_frozen;
+  window_class->has_pointer = meta_window_x11_has_pointer;
 }
 
 void
@@ -3558,121 +3712,38 @@ meta_window_x11_set_allowed_actions_hint (MetaWindow *window)
 #undef MAX_N_ACTIONS
 }
 
-void
-meta_window_x11_create_sync_request_alarm (MetaWindow *window)
-{
-  MetaX11Display *x11_display = window->display->x11_display;
-  XSyncAlarmAttributes values;
-  XSyncValue init;
-
-  if (window->sync_request_counter == None ||
-      window->sync_request_alarm != None)
-    return;
-
-  meta_x11_error_trap_push (x11_display);
-
-  /* In the new (extended style), the counter value is initialized by
-   * the client before mapping the window. In the old style, we're
-   * responsible for setting the initial value of the counter.
-   */
-  if (window->extended_sync_request_counter)
-    {
-      if (!XSyncQueryCounter(x11_display->xdisplay,
-                             window->sync_request_counter,
-                             &init))
-        {
-          meta_x11_error_trap_pop_with_return (x11_display);
-          window->sync_request_counter = None;
-          return;
-        }
-
-      window->sync_request_serial =
-        XSyncValueLow32 (init) + ((gint64)XSyncValueHigh32 (init) << 32);
-    }
-  else
-    {
-      XSyncIntToValue (&init, 0);
-      XSyncSetCounter (x11_display->xdisplay,
-                       window->sync_request_counter, init);
-      window->sync_request_serial = 0;
-    }
-
-  values.trigger.counter = window->sync_request_counter;
-  values.trigger.test_type = XSyncPositiveComparison;
-
-  /* Initialize to one greater than the current value */
-  values.trigger.value_type = XSyncRelative;
-  XSyncIntToValue (&values.trigger.wait_value, 1);
-
-  /* After triggering, increment test_value by this until
-   * until the test condition is false */
-  XSyncIntToValue (&values.delta, 1);
-
-  /* we want events (on by default anyway) */
-  values.events = True;
-
-  window->sync_request_alarm = XSyncCreateAlarm (x11_display->xdisplay,
-                                                 XSyncCACounter |
-                                                 XSyncCAValueType |
-                                                 XSyncCAValue |
-                                                 XSyncCATestType |
-                                                 XSyncCADelta |
-                                                 XSyncCAEvents,
-                                                 &values);
-
-  if (meta_x11_error_trap_pop_with_return (x11_display) == Success)
-    meta_x11_display_register_sync_alarm (x11_display, &window->sync_request_alarm, window);
-  else
-    {
-      window->sync_request_alarm = None;
-      window->sync_request_counter = None;
-    }
-}
-
-void
-meta_window_x11_destroy_sync_request_alarm (MetaWindow *window)
-{
-  MetaX11Display *x11_display = window->display->x11_display;
-
-  if (window->sync_request_alarm != None)
-    {
-      /* Has to be unregistered _before_ clearing the structure field */
-      meta_x11_display_unregister_sync_alarm (x11_display, window->sync_request_alarm);
-      XSyncDestroyAlarm (x11_display->xdisplay,
-                         window->sync_request_alarm);
-      window->sync_request_alarm = None;
-    }
-}
-
 void
 meta_window_x11_update_sync_request_counter (MetaWindow *window,
                                              gint64      new_counter_value)
 {
+  MetaWindowX11 *window_x11 = META_WINDOW_X11 (window);
+  MetaWindowX11Private *priv =
+    meta_window_x11_get_instance_private (window_x11);
   gboolean needs_frame_drawn = FALSE;
   gboolean no_delay_frame = FALSE;
 
-  if (window->extended_sync_request_counter && new_counter_value % 2 == 0)
+  if (priv->extended_sync_request_counter && new_counter_value % 2 == 0)
     {
       needs_frame_drawn = TRUE;
-      no_delay_frame = new_counter_value == window->sync_request_serial + 1;
+      no_delay_frame = new_counter_value == priv->sync_request_serial + 1;
     }
 
-  window->sync_request_serial = new_counter_value;
+  priv->sync_request_serial = new_counter_value;
   meta_compositor_sync_updates_frozen (window->display->compositor, window);
 
   if (window == window->display->grab_window &&
       meta_grab_op_is_resizing (window->display->grab_op) &&
-      new_counter_value >= window->sync_request_wait_serial &&
-      (!window->extended_sync_request_counter || new_counter_value % 2 == 0) &&
-      window->sync_request_timeout_id)
+      new_counter_value >= priv->sync_request_wait_serial &&
+      (!priv->extended_sync_request_counter || new_counter_value % 2 == 0) &&
+      priv->sync_request_timeout_id)
     {
       meta_topic (META_DEBUG_RESIZING,
                   "Alarm event received last motion x = %d y = %d\n",
                   window->display->grab_latest_motion_x,
                   window->display->grab_latest_motion_y);
 
-      g_source_remove (window->sync_request_timeout_id);
-      window->sync_request_timeout_id = 0;
+      g_source_remove (priv->sync_request_timeout_id);
+      priv->sync_request_timeout_id = 0;
 
       /* This means we are ready for another configure;
        * no pointer round trip here, to keep in sync */
@@ -3687,7 +3758,7 @@ meta_window_x11_update_sync_request_counter (MetaWindow *window,
    * the application has come to its senses (maybe it was just
    * busy with a pagefault or a long computation).
    */
-  window->disable_sync = FALSE;
+  priv->disable_sync = FALSE;
 
   if (needs_frame_drawn)
     meta_compositor_queue_frame_drawn (window->display->compositor, window,
@@ -3699,3 +3770,86 @@ meta_window_x11_get_toplevel_xwindow (MetaWindow *window)
 {
   return window->frame ? window->frame->xwindow : window->xwindow;
 }
+
+int64_t
+meta_window_x11_get_sync_request_serial (MetaWindowX11 *window_x11)
+{
+  MetaWindowX11Private *priv =
+    meta_window_x11_get_instance_private (window_x11);
+
+  g_return_val_if_fail (META_IS_WINDOW_X11 (window_x11), -1);
+
+  return priv->sync_request_serial;
+}
+
+gboolean
+meta_window_x11_has_sync_request_alarm (MetaWindowX11 *window_x11)
+{
+  MetaWindowX11Private *priv =
+    meta_window_x11_get_instance_private (window_x11);
+
+  g_return_val_if_fail (META_IS_WINDOW_X11 (window_x11), FALSE);
+
+  return !priv->disable_sync &&
+          priv->sync_request_alarm != None;
+}
+
+gboolean
+meta_window_x11_is_sync_request_scheduled (MetaWindowX11 *window_x11)
+{
+  MetaWindowX11Private *priv =
+    meta_window_x11_get_instance_private (window_x11);
+
+  g_return_val_if_fail (META_IS_WINDOW_X11 (window_x11), FALSE);
+
+  return priv->sync_request_timeout_id != 0;
+}
+
+gboolean
+meta_window_x11_has_extended_sync_request_counter (MetaWindowX11 *window_x11)
+{
+  MetaWindowX11Private *priv =
+    meta_window_x11_get_instance_private (window_x11);
+
+  g_return_val_if_fail (META_IS_WINDOW_X11 (window_x11), FALSE);
+
+  return priv->extended_sync_request_counter;
+}
+
+void
+meta_window_x11_setup_sync_request_counter (MetaWindowX11 *window_x11,
+                                            MetaPropValue *value)
+{
+  MetaWindowX11Private *priv =
+    meta_window_x11_get_instance_private (window_x11);
+  MetaWindow *window = META_WINDOW (window_x11);
+
+  if (value->type == META_PROP_VALUE_INVALID)
+    return;
+
+  meta_window_x11_destroy_sync_request_alarm (window);
+  priv->sync_request_counter = None;
+
+  if (value->v.xcounter_list.n_counters == 0)
+    {
+      meta_warning ("_NET_WM_SYNC_REQUEST_COUNTER is empty\n");
+      return;
+    }
+
+  if (value->v.xcounter_list.n_counters == 1)
+    {
+      priv->sync_request_counter = value->v.xcounter_list.counters[0];
+      priv->extended_sync_request_counter = FALSE;
+    }
+  else
+    {
+      priv->sync_request_counter = value->v.xcounter_list.counters[1];
+      priv->extended_sync_request_counter = TRUE;
+    }
+  meta_verbose ("Window has _NET_WM_SYNC_REQUEST_COUNTER 0x%lx (extended=%s)\n",
+                priv->sync_request_counter,
+                priv->extended_sync_request_counter ? "true" : "false");
+
+  if (priv->extended_sync_request_counter)
+    meta_window_x11_create_sync_request_alarm (window);
+}

src/x11/window-x11.h

@@ -59,8 +59,6 @@ void meta_window_x11_set_wm_delete_window        (MetaWindow *window,
                                                   gboolean    delete_window);
 void meta_window_x11_set_allowed_actions_hint    (MetaWindow *window);
 
-void meta_window_x11_create_sync_request_alarm   (MetaWindow *window);
-void meta_window_x11_destroy_sync_request_alarm  (MetaWindow *window);
 void meta_window_x11_update_sync_request_counter (MetaWindow *window,
                                                   gint64      new_counter_value);
 
@@ -81,4 +79,10 @@ void     meta_window_x11_configure_notify        (MetaWindow      *window,
 
 Window   meta_window_x11_get_toplevel_xwindow    (MetaWindow *window);
 
+int64_t  meta_window_x11_get_sync_request_serial   (MetaWindowX11 *window_x11);
+gboolean meta_window_x11_is_sync_request_scheduled (MetaWindowX11 *window_x11);
+gboolean meta_window_x11_has_sync_request_alarm    (MetaWindowX11 *window_x11);
+
+gboolean meta_window_x11_has_extended_sync_request_counter (MetaWindowX11 *window_x11);
+
 #endif