moving from https://github.com/perberos/mate-desktop-environment

1 files changed, 859 insertions, 0 deletions

diff --git a/applets/notification_area/na-tray-manager.c b/applets/notification_area/na-tray-manager.c
new file mode 100644
index 00000000..1c582a62
--- /dev/null
+++ b/applets/notification_area/na-tray-manager.c
@@ -0,0 +1,859 @@
+/* na-tray-manager.c
+ * Copyright (C) 2002 Anders Carlsson <[email protected]>
+ * Copyright (C) 2003-2006 Vincent Untz
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Used to be: eggtraymanager.c
+ */
+
+#include <config.h>
+#include <string.h>
+#include <libintl.h>
+
+#include "na-tray-manager.h"
+
+#include <gdkconfig.h>
+#include <glib/gi18n.h>
+#if defined (GDK_WINDOWING_X11)
+#include <gdk/gdkx.h>
+#include <X11/Xatom.h>
+#elif defined (GDK_WINDOWING_WIN32)
+#include <gdk/gdkwin32.h>
+#endif
+#include <gtk/gtk.h>
+
+#include "na-marshal.h"
+
+/* Signals */
+enum
+{
+  TRAY_ICON_ADDED,
+  TRAY_ICON_REMOVED,
+  MESSAGE_SENT,
+  MESSAGE_CANCELLED,
+  LOST_SELECTION,
+  LAST_SIGNAL
+};
+
+enum {
+  PROP_0,
+  PROP_ORIENTATION
+};
+
+typedef struct
+{
+  long id, len;
+  long remaining_len;
+
+  long timeout;
+  char *str;
+#ifdef GDK_WINDOWING_X11
+  Window window;
+#endif
+} PendingMessage;
+
+static guint manager_signals[LAST_SIGNAL];
+
+#define SYSTEM_TRAY_REQUEST_DOCK    0
+#define SYSTEM_TRAY_BEGIN_MESSAGE   1
+#define SYSTEM_TRAY_CANCEL_MESSAGE  2
+
+#define SYSTEM_TRAY_ORIENTATION_HORZ 0
+#define SYSTEM_TRAY_ORIENTATION_VERT 1
+
+#ifdef GDK_WINDOWING_X11
+static gboolean na_tray_manager_check_running_screen_x11 (GdkScreen *screen);
+#endif
+
+static void na_tray_manager_finalize     (GObject      *object);
+static void na_tray_manager_set_property (GObject      *object,
+					  guint         prop_id,
+					  const GValue *value,
+					  GParamSpec   *pspec);
+static void na_tray_manager_get_property (GObject      *object,
+					  guint         prop_id,
+					  GValue       *value,
+					  GParamSpec   *pspec);
+
+static void na_tray_manager_unmanage (NaTrayManager *manager);
+
+G_DEFINE_TYPE (NaTrayManager, na_tray_manager, G_TYPE_OBJECT)
+
+static void
+na_tray_manager_init (NaTrayManager *manager)
+{
+  manager->invisible = NULL;
+  manager->socket_table = g_hash_table_new (NULL, NULL);
+}
+
+static void
+na_tray_manager_class_init (NaTrayManagerClass *klass)
+{
+  GObjectClass *gobject_class;
+
+  gobject_class = (GObjectClass *)klass;
+
+  gobject_class->finalize = na_tray_manager_finalize;
+  gobject_class->set_property = na_tray_manager_set_property;
+  gobject_class->get_property = na_tray_manager_get_property;
+
+  g_object_class_install_property (gobject_class,
+				   PROP_ORIENTATION,
+				   g_param_spec_enum ("orientation",
+						      "orientation",
+						      "orientation",
+						      GTK_TYPE_ORIENTATION,
+						      GTK_ORIENTATION_HORIZONTAL,
+						      G_PARAM_READWRITE |
+						      G_PARAM_CONSTRUCT |
+						      G_PARAM_STATIC_NAME |
+						      G_PARAM_STATIC_NICK |
+						      G_PARAM_STATIC_BLURB));
+
+  manager_signals[TRAY_ICON_ADDED] =
+    g_signal_new ("tray_icon_added",
+		  G_OBJECT_CLASS_TYPE (klass),
+		  G_SIGNAL_RUN_LAST,
+		  G_STRUCT_OFFSET (NaTrayManagerClass, tray_icon_added),
+		  NULL, NULL,
+		  g_cclosure_marshal_VOID__OBJECT,
+		  G_TYPE_NONE, 1,
+		  GTK_TYPE_SOCKET);
+
+  manager_signals[TRAY_ICON_REMOVED] =
+    g_signal_new ("tray_icon_removed",
+		  G_OBJECT_CLASS_TYPE (klass),
+		  G_SIGNAL_RUN_LAST,
+		  G_STRUCT_OFFSET (NaTrayManagerClass, tray_icon_removed),
+		  NULL, NULL,
+		  g_cclosure_marshal_VOID__OBJECT,
+		  G_TYPE_NONE, 1,
+		  GTK_TYPE_SOCKET);
+  manager_signals[MESSAGE_SENT] =
+    g_signal_new ("message_sent",
+		  G_OBJECT_CLASS_TYPE (klass),
+		  G_SIGNAL_RUN_LAST,
+		  G_STRUCT_OFFSET (NaTrayManagerClass, message_sent),
+		  NULL, NULL,
+		  _na_marshal_VOID__OBJECT_STRING_LONG_LONG,
+		  G_TYPE_NONE, 4,
+		  GTK_TYPE_SOCKET,
+		  G_TYPE_STRING,
+		  G_TYPE_LONG,
+		  G_TYPE_LONG);
+  manager_signals[MESSAGE_CANCELLED] =
+    g_signal_new ("message_cancelled",
+		  G_OBJECT_CLASS_TYPE (klass),
+		  G_SIGNAL_RUN_LAST,
+		  G_STRUCT_OFFSET (NaTrayManagerClass, message_cancelled),
+		  NULL, NULL,
+		  _na_marshal_VOID__OBJECT_LONG,
+		  G_TYPE_NONE, 2,
+		  GTK_TYPE_SOCKET,
+		  G_TYPE_LONG);
+  manager_signals[LOST_SELECTION] =
+    g_signal_new ("lost_selection",
+		  G_OBJECT_CLASS_TYPE (klass),
+		  G_SIGNAL_RUN_LAST,
+		  G_STRUCT_OFFSET (NaTrayManagerClass, lost_selection),
+		  NULL, NULL,
+		  g_cclosure_marshal_VOID__VOID,
+		  G_TYPE_NONE, 0);
+
+#if defined (GDK_WINDOWING_X11)
+  /* Nothing */
+#elif defined (GDK_WINDOWING_WIN32)
+  g_warning ("Port NaTrayManager to Win32");
+#else
+  g_warning ("Port NaTrayManager to this GTK+ backend");
+#endif
+}
+
+static void
+na_tray_manager_finalize (GObject *object)
+{
+  NaTrayManager *manager;
+
+  manager = NA_TRAY_MANAGER (object);
+
+  na_tray_manager_unmanage (manager);
+
+  g_list_free (manager->messages);
+  g_hash_table_destroy (manager->socket_table);
+
+  G_OBJECT_CLASS (na_tray_manager_parent_class)->finalize (object);
+}
+
+static void
+na_tray_manager_set_property (GObject      *object,
+			      guint         prop_id,
+			      const GValue *value,
+			      GParamSpec   *pspec)
+{
+  NaTrayManager *manager = NA_TRAY_MANAGER (object);
+
+  switch (prop_id)
+    {
+    case PROP_ORIENTATION:
+      na_tray_manager_set_orientation (manager, g_value_get_enum (value));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+na_tray_manager_get_property (GObject    *object,
+			      guint       prop_id,
+			      GValue     *value,
+			      GParamSpec *pspec)
+{
+  NaTrayManager *manager = NA_TRAY_MANAGER (object);
+
+  switch (prop_id)
+    {
+    case PROP_ORIENTATION:
+      g_value_set_enum (value, manager->orientation);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+NaTrayManager *
+na_tray_manager_new (void)
+{
+  NaTrayManager *manager;
+
+  manager = g_object_new (NA_TYPE_TRAY_MANAGER, NULL);
+
+  return manager;
+}
+
+#ifdef GDK_WINDOWING_X11
+
+static gboolean
+na_tray_manager_plug_removed (GtkSocket       *socket,
+			      NaTrayManager   *manager)
+{
+  NaTrayChild *child = NA_TRAY_CHILD (socket);
+
+  g_hash_table_remove (manager->socket_table,
+                       GINT_TO_POINTER (child->icon_window));
+  g_signal_emit (manager, manager_signals[TRAY_ICON_REMOVED], 0, child);
+
+  /* This destroys the socket. */
+  return FALSE;
+}
+
+static void
+na_tray_manager_handle_dock_request (NaTrayManager       *manager,
+				     XClientMessageEvent *xevent)
+{
+  Window icon_window = xevent->data.l[2];
+  GtkWidget *child;
+
+  if (g_hash_table_lookup (manager->socket_table,
+                           GINT_TO_POINTER (icon_window)))
+    {
+      /* We already got this notification earlier, ignore this one */
+      return;
+    }
+
+  child = na_tray_child_new (manager->screen, icon_window);
+  if (child == NULL) /* already gone or other error */
+    return;
+
+  g_signal_emit (manager, manager_signals[TRAY_ICON_ADDED], 0,
+		 child);
+
+  /* If the child wasn't attached, then destroy it */
+
+  if (!GTK_IS_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (child))))
+    {
+      gtk_widget_destroy (child);
+      return;
+    }
+
+  g_signal_connect (child, "plug_removed",
+		    G_CALLBACK (na_tray_manager_plug_removed), manager);
+
+  gtk_socket_add_id (GTK_SOCKET (child), icon_window);
+
+  if (!gtk_socket_get_plug_window (GTK_SOCKET (child)))
+    {
+      /* Embedding failed, we won't get a plug-removed signal */
+      g_signal_emit (manager, manager_signals[TRAY_ICON_REMOVED], 0, child);
+      gtk_widget_destroy (child);
+      return;
+    }
+
+  g_hash_table_insert (manager->socket_table,
+                       GINT_TO_POINTER (icon_window), child);
+  gtk_widget_show (child);
+}
+
+static void
+pending_message_free (PendingMessage *message)
+{
+  g_free (message->str);
+  g_free (message);
+}
+
+static GdkFilterReturn
+na_tray_manager_handle_client_message_message_data (GdkXEvent *xev,
+                                                    GdkEvent  *event,
+                                                    gpointer   data)
+{
+  XClientMessageEvent *xevent;
+  NaTrayManager       *manager;
+  GList               *p;
+  int                  len;
+
+  xevent  = (XClientMessageEvent *) xev;
+  manager = data;
+
+  /* Try to see if we can find the pending message in the list */
+  for (p = manager->messages; p; p = p->next)
+    {
+      PendingMessage *msg = p->data;
+
+      if (xevent->window == msg->window)
+	{
+	  /* Append the message */
+	  len = MIN (msg->remaining_len, 20);
+
+	  memcpy ((msg->str + msg->len - msg->remaining_len),
+		  &xevent->data, len);
+	  msg->remaining_len -= len;
+
+	  if (msg->remaining_len == 0)
+	    {
+	      GtkSocket *socket;
+
+	      socket = g_hash_table_lookup (manager->socket_table,
+                                            GINT_TO_POINTER (msg->window));
+
+	      if (socket)
+		  g_signal_emit (manager, manager_signals[MESSAGE_SENT], 0,
+				 socket, msg->str, msg->id, msg->timeout);
+
+	      pending_message_free (msg);
+	      manager->messages = g_list_remove_link (manager->messages, p);
+              g_list_free_1 (p);
+	    }
+
+          break;
+	}
+    }
+
+  return GDK_FILTER_REMOVE;
+}
+
+static void
+na_tray_manager_handle_begin_message (NaTrayManager       *manager,
+				      XClientMessageEvent *xevent)
+{
+  GtkSocket      *socket;
+  GList          *p;
+  PendingMessage *msg;
+  long            timeout;
+  long            len;
+  long            id;
+
+  socket = g_hash_table_lookup (manager->socket_table,
+                                GINT_TO_POINTER (xevent->window));
+  /* we don't know about this tray icon, so ignore the message */
+  if (!socket)
+    return;
+
+  /* Check if the same message is already in the queue and remove it if so */
+  for (p = manager->messages; p; p = p->next)
+    {
+      PendingMessage *pmsg = p->data;
+
+      if (xevent->window == pmsg->window &&
+	  xevent->data.l[4] == pmsg->id)
+	{
+	  /* Hmm, we found it, now remove it */
+	  pending_message_free (pmsg);
+	  manager->messages = g_list_remove_link (manager->messages, p);
+          g_list_free_1 (p);
+	  break;
+	}
+    }
+
+  timeout = xevent->data.l[2];
+  len     = xevent->data.l[3];
+  id      = xevent->data.l[4];
+
+  if (len == 0)
+    {
+      g_signal_emit (manager, manager_signals[MESSAGE_SENT], 0,
+                     socket, "", id, timeout);
+    }
+  else
+    {
+      /* Now add the new message to the queue */
+      msg = g_new0 (PendingMessage, 1);
+      msg->window = xevent->window;
+      msg->timeout = timeout;
+      msg->len = len;
+      msg->id = id;
+      msg->remaining_len = msg->len;
+      msg->str = g_malloc (msg->len + 1);
+      msg->str[msg->len] = '\0';
+      manager->messages = g_list_prepend (manager->messages, msg);
+    }
+}
+
+static void
+na_tray_manager_handle_cancel_message (NaTrayManager       *manager,
+				       XClientMessageEvent *xevent)
+{
+  GList     *p;
+  GtkSocket *socket;
+
+  /* Check if the message is in the queue and remove it if so */
+  for (p = manager->messages; p; p = p->next)
+    {
+      PendingMessage *msg = p->data;
+
+      if (xevent->window == msg->window &&
+	  xevent->data.l[4] == msg->id)
+	{
+	  pending_message_free (msg);
+	  manager->messages = g_list_remove_link (manager->messages, p);
+          g_list_free_1 (p);
+	  break;
+	}
+    }
+
+  socket = g_hash_table_lookup (manager->socket_table,
+                                GINT_TO_POINTER (xevent->window));
+
+  if (socket)
+    {
+      g_signal_emit (manager, manager_signals[MESSAGE_CANCELLED], 0,
+		     socket, xevent->data.l[2]);
+    }
+}
+
+static GdkFilterReturn
+na_tray_manager_handle_client_message_opcode (GdkXEvent *xev,
+                                              GdkEvent  *event,
+                                              gpointer   data)
+{
+  XClientMessageEvent *xevent;
+  NaTrayManager       *manager;
+
+  xevent  = (XClientMessageEvent *) xev;
+  manager = data;
+
+  switch (xevent->data.l[1])
+    {
+    case SYSTEM_TRAY_REQUEST_DOCK:
+      /* Ignore this one since we don't know on which window this was received
+       * and so we can't know for which screen this is. It will be handled
+       * in na_tray_manager_window_filter() since we also receive it there */
+      break;
+
+    case SYSTEM_TRAY_BEGIN_MESSAGE:
+      na_tray_manager_handle_begin_message (manager, xevent);
+      return GDK_FILTER_REMOVE;
+
+    case SYSTEM_TRAY_CANCEL_MESSAGE:
+      na_tray_manager_handle_cancel_message (manager, xevent);
+      return GDK_FILTER_REMOVE;
+    default:
+      break;
+    }
+
+  return GDK_FILTER_CONTINUE;
+}
+
+static GdkFilterReturn
+na_tray_manager_window_filter (GdkXEvent *xev,
+                               GdkEvent  *event,
+                               gpointer   data)
+{
+  XEvent        *xevent = (GdkXEvent *)xev;
+  NaTrayManager *manager = data;
+
+  if (xevent->type == ClientMessage)
+    {
+      /* We handle this client message here. See comment in
+       * na_tray_manager_handle_client_message_opcode() for details */
+      if (xevent->xclient.message_type == manager->opcode_atom &&
+          xevent->xclient.data.l[1]    == SYSTEM_TRAY_REQUEST_DOCK)
+	{
+          na_tray_manager_handle_dock_request (manager,
+                                               (XClientMessageEvent *) xevent);
+          return GDK_FILTER_REMOVE;
+	}
+    }
+  else if (xevent->type == SelectionClear)
+    {
+      g_signal_emit (manager, manager_signals[LOST_SELECTION], 0);
+      na_tray_manager_unmanage (manager);
+    }
+
+  return GDK_FILTER_CONTINUE;
+}
+
+#if 0
+//FIXME investigate why this doesn't work
+static gboolean
+na_tray_manager_selection_clear_event (GtkWidget         *widget,
+                                       GdkEventSelection *event,
+                                       NaTrayManager     *manager)
+{
+  g_signal_emit (manager, manager_signals[LOST_SELECTION], 0);
+  na_tray_manager_unmanage (manager);
+
+  return FALSE;
+}
+#endif
+#endif
+
+static void
+na_tray_manager_unmanage (NaTrayManager *manager)
+{
+#ifdef GDK_WINDOWING_X11
+  GdkDisplay *display;
+  guint32     timestamp;
+  GtkWidget  *invisible;
+  GdkWindow  *window;
+
+  if (manager->invisible == NULL)
+    return;
+
+  invisible = manager->invisible;
+  window = gtk_widget_get_window (invisible);
+
+  g_assert (GTK_IS_INVISIBLE (invisible));
+  g_assert (gtk_widget_get_realized (invisible));
+  g_assert (GDK_IS_WINDOW (window));
+
+  display = gtk_widget_get_display (invisible);
+
+  if (gdk_selection_owner_get_for_display (display, manager->selection_atom) ==
+      window)
+    {
+      timestamp = gdk_x11_get_server_time (window);
+      gdk_selection_owner_set_for_display (display,
+                                           NULL,
+                                           manager->selection_atom,
+                                           timestamp,
+                                           TRUE);
+    }
+
+  //FIXME: we should also use gdk_remove_client_message_filter when it's
+  //available
+  // See bug #351254
+  gdk_window_remove_filter (window,
+                            na_tray_manager_window_filter, manager);
+
+  manager->invisible = NULL; /* prior to destroy for reentrancy paranoia */
+  gtk_widget_destroy (invisible);
+  g_object_unref (G_OBJECT (invisible));
+#endif
+}
+
+static void
+na_tray_manager_set_orientation_property (NaTrayManager *manager)
+{
+#ifdef GDK_WINDOWING_X11
+  GdkWindow  *window;
+  GdkDisplay *display;
+  Atom        orientation_atom;
+  gulong      data[1];
+
+  if (!manager->invisible)
+    return;
+  window = gtk_widget_get_window (manager->invisible);
+  if (!window)
+    return;
+
+  display = gtk_widget_get_display (manager->invisible);
+  orientation_atom = gdk_x11_get_xatom_by_name_for_display (display,
+                                                            "_NET_SYSTEM_TRAY_ORIENTATION");
+
+  data[0] = manager->orientation == GTK_ORIENTATION_HORIZONTAL ?
+		SYSTEM_TRAY_ORIENTATION_HORZ :
+		SYSTEM_TRAY_ORIENTATION_VERT;
+
+  XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
+		   GDK_WINDOW_XWINDOW (window),
+                   orientation_atom,
+		   XA_CARDINAL, 32,
+		   PropModeReplace,
+		   (guchar *) &data, 1);
+#endif
+}
+
+static void
+na_tray_manager_set_visual_property (NaTrayManager *manager)
+{
+#ifdef GDK_WINDOWING_X11
+  GdkWindow  *window;
+  GdkDisplay *display;
+  Visual     *xvisual;
+  Atom        visual_atom;
+  gulong      data[1];
+
+  if (!manager->invisible)
+    return;
+  window = gtk_widget_get_window (manager->invisible);
+  if (!window)
+    return;
+
+  /* The visual property is a hint to the tray icons as to what visual they
+   * should use for their windows. If the X server has RGBA colormaps, then
+   * we tell the tray icons to use a RGBA colormap and we'll composite the
+   * icon onto its parents with real transparency. Otherwise, we just tell
+   * the icon to use our colormap, and we'll do some hacks with parent
+   * relative backgrounds to simulate transparency.
+   */
+
+  display = gtk_widget_get_display (manager->invisible);
+  visual_atom = gdk_x11_get_xatom_by_name_for_display (display,
+						       "_NET_SYSTEM_TRAY_VISUAL");
+
+  if (gdk_screen_get_rgba_visual (manager->screen) != NULL &&
+      gdk_display_supports_composite (display))
+    {
+      xvisual = GDK_VISUAL_XVISUAL (gdk_screen_get_rgba_visual (manager->screen));
+    }
+  else
+    {
+      /* We actually want the visual of the tray where the icons will
+       * be embedded. In almost all cases, this will be the same as the visual
+       * of the screen.
+       */
+      GdkColormap *colormap;
+
+      colormap = gdk_screen_get_default_colormap (manager->screen);
+      xvisual = GDK_VISUAL_XVISUAL (gdk_colormap_get_visual (colormap));
+    }
+
+  data[0] = XVisualIDFromVisual (xvisual);
+
+  XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
+                   GDK_WINDOW_XWINDOW (window),
+                   visual_atom,
+                   XA_VISUALID, 32,
+                   PropModeReplace,
+                   (guchar *) &data, 1);
+#endif
+}
+
+#ifdef GDK_WINDOWING_X11
+
+static gboolean
+na_tray_manager_manage_screen_x11 (NaTrayManager *manager,
+				   GdkScreen     *screen)
+{
+  GdkDisplay *display;
+  Screen     *xscreen;
+  GtkWidget  *invisible;
+  GdkWindow  *window;
+  char       *selection_atom_name;
+  guint32     timestamp;
+
+  g_return_val_if_fail (NA_IS_TRAY_MANAGER (manager), FALSE);
+  g_return_val_if_fail (manager->screen == NULL, FALSE);
+
+  /* If there's already a manager running on the screen
+   * we can't create another one.
+   */
+#if 0
+  if (na_tray_manager_check_running_screen_x11 (screen))
+    return FALSE;
+#endif
+
+  manager->screen = screen;
+
+  display = gdk_screen_get_display (screen);
+  xscreen = GDK_SCREEN_XSCREEN (screen);
+
+  invisible = gtk_invisible_new_for_screen (screen);
+  gtk_widget_realize (invisible);
+
+  gtk_widget_add_events (invisible,
+                         GDK_PROPERTY_CHANGE_MASK | GDK_STRUCTURE_MASK);
+
+  selection_atom_name = g_strdup_printf ("_NET_SYSTEM_TRAY_S%d",
+					 gdk_screen_get_number (screen));
+  manager->selection_atom = gdk_atom_intern (selection_atom_name, FALSE);
+  g_free (selection_atom_name);
+
+  manager->invisible = invisible;
+  g_object_ref (G_OBJECT (manager->invisible));
+
+  na_tray_manager_set_orientation_property (manager);
+  na_tray_manager_set_visual_property (manager);
+
+  window = gtk_widget_get_window (invisible);
+
+  timestamp = gdk_x11_get_server_time (window);
+
+  /* Check if we could set the selection owner successfully */
+  if (gdk_selection_owner_set_for_display (display,
+                                           window,
+                                           manager->selection_atom,
+                                           timestamp,
+                                           TRUE))
+    {
+      XClientMessageEvent xev;
+      GdkAtom             opcode_atom;
+      GdkAtom             message_data_atom;
+
+      xev.type = ClientMessage;
+      xev.window = RootWindowOfScreen (xscreen);
+      xev.message_type = gdk_x11_get_xatom_by_name_for_display (display,
+                                                                "MANAGER");
+
+      xev.format = 32;
+      xev.data.l[0] = timestamp;
+      xev.data.l[1] = gdk_x11_atom_to_xatom_for_display (display,
+                                                         manager->selection_atom);
+      xev.data.l[2] = GDK_WINDOW_XWINDOW (window);
+      xev.data.l[3] = 0;	/* manager specific data */
+      xev.data.l[4] = 0;	/* manager specific data */
+
+      XSendEvent (GDK_DISPLAY_XDISPLAY (display),
+		  RootWindowOfScreen (xscreen),
+		  False, StructureNotifyMask, (XEvent *)&xev);
+
+      opcode_atom = gdk_atom_intern ("_NET_SYSTEM_TRAY_OPCODE", FALSE);
+      manager->opcode_atom = gdk_x11_atom_to_xatom_for_display (display,
+                                                                opcode_atom);
+
+      message_data_atom = gdk_atom_intern ("_NET_SYSTEM_TRAY_MESSAGE_DATA",
+                                           FALSE);
+
+      /* Add a window filter */
+#if 0
+      /* This is for when we lose the selection of _NET_SYSTEM_TRAY_Sx */
+      g_signal_connect (invisible, "selection-clear-event",
+                        G_CALLBACK (na_tray_manager_selection_clear_event),
+                        manager);
+#endif
+      /* This is for SYSTEM_TRAY_REQUEST_DOCK and SelectionClear */
+      gdk_window_add_filter (window,
+                             na_tray_manager_window_filter, manager);
+      /* This is for SYSTEM_TRAY_BEGIN_MESSAGE and SYSTEM_TRAY_CANCEL_MESSAGE */
+      gdk_display_add_client_message_filter (display, opcode_atom,
+                                             na_tray_manager_handle_client_message_opcode,
+                                             manager);
+      /* This is for _NET_SYSTEM_TRAY_MESSAGE_DATA */
+      gdk_display_add_client_message_filter (display, message_data_atom,
+                                             na_tray_manager_handle_client_message_message_data,
+                                             manager);
+      return TRUE;
+    }
+  else
+    {
+      gtk_widget_destroy (invisible);
+      g_object_unref (invisible);
+      manager->invisible = NULL;
+
+      manager->screen = NULL;
+
+      return FALSE;
+    }
+}
+
+#endif
+
+gboolean
+na_tray_manager_manage_screen (NaTrayManager *manager,
+			       GdkScreen     *screen)
+{
+  g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);
+  g_return_val_if_fail (manager->screen == NULL, FALSE);
+
+#ifdef GDK_WINDOWING_X11
+  return na_tray_manager_manage_screen_x11 (manager, screen);
+#else
+  return FALSE;
+#endif
+}
+
+#ifdef GDK_WINDOWING_X11
+
+static gboolean
+na_tray_manager_check_running_screen_x11 (GdkScreen *screen)
+{
+  GdkDisplay *display;
+  Atom        selection_atom;
+  char       *selection_atom_name;
+
+  display = gdk_screen_get_display (screen);
+  selection_atom_name = g_strdup_printf ("_NET_SYSTEM_TRAY_S%d",
+                                         gdk_screen_get_number (screen));
+  selection_atom = gdk_x11_get_xatom_by_name_for_display (display,
+                                                          selection_atom_name);
+  g_free (selection_atom_name);
+
+  if (XGetSelectionOwner (GDK_DISPLAY_XDISPLAY (display),
+                          selection_atom) != None)
+    return TRUE;
+  else
+    return FALSE;
+}
+
+#endif
+
+gboolean
+na_tray_manager_check_running (GdkScreen *screen)
+{
+  g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);
+
+#ifdef GDK_WINDOWING_X11
+  return na_tray_manager_check_running_screen_x11 (screen);
+#else
+  return FALSE;
+#endif
+}
+
+void
+na_tray_manager_set_orientation (NaTrayManager  *manager,
+				 GtkOrientation  orientation)
+{
+  g_return_if_fail (NA_IS_TRAY_MANAGER (manager));
+
+  if (manager->orientation != orientation)
+    {
+      manager->orientation = orientation;
+
+      na_tray_manager_set_orientation_property (manager);
+
+      g_object_notify (G_OBJECT (manager), "orientation");
+    }
+}
+
+GtkOrientation
+na_tray_manager_get_orientation (NaTrayManager *manager)
+{
+  g_return_val_if_fail (NA_IS_TRAY_MANAGER (manager), GTK_ORIENTATION_HORIZONTAL);
+
+  return manager->orientation;
+}