changing code format (http://imageshack.us/photo/my-images/9/254223656580e542a60a.jpg/)

1 files changed, 575 insertions, 526 deletions

diff --git a/plugins/background/msd-background-manager.c b/plugins/background/msd-background-manager.c
index 25ab7ec..6a567c5 100644
--- a/plugins/background/msd-background-manager.c
+++ b/plugins/background/msd-background-manager.c
@@ -51,529 +51,578 @@
 
 #define MSD_BACKGROUND_MANAGER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), MSD_TYPE_BACKGROUND_MANAGER, MsdBackgroundManagerPrivate))
 
-struct MsdBackgroundManagerPrivate
-{
-        MateConfClient *client;
-        MateBG     *bg;
-        guint        bg_notify_id;
-        guint        timeout_id;
-
-        DBusConnection *dbus_connection;
-};
-
-static void     msd_background_manager_class_init  (MsdBackgroundManagerClass *klass);
-static void     msd_background_manager_init        (MsdBackgroundManager      *background_manager);
-static void     msd_background_manager_finalize    (GObject             *object);
-
-G_DEFINE_TYPE (MsdBackgroundManager, msd_background_manager, G_TYPE_OBJECT)
-
-static gpointer manager_object = NULL;
-
-static gboolean
-caja_is_running (void)
-{
-       Atom           window_id_atom;
-       Window         caja_xid;
-       Atom           actual_type;
-       int            actual_format;
-       unsigned long  nitems;
-       unsigned long  bytes_after;
-       unsigned char *data;
-       int            retval;
-       Atom           wmclass_atom;
-       gboolean       running;
-       gint           error;
-
-       window_id_atom = XInternAtom (GDK_DISPLAY_XDISPLAY(gdk_display_get_default()),
-                                     "CAJA_DESKTOP_WINDOW_ID", True);
-
-       if (window_id_atom == None) {
-               return FALSE;
-       }
-
-       retval = XGetWindowProperty (GDK_DISPLAY_XDISPLAY(gdk_display_get_default()),
-                                    GDK_ROOT_WINDOW (),
-                                    window_id_atom,
-                                    0,
-                                    1,
-                                    False,
-                                    XA_WINDOW,
-                                    &actual_type,
-                                    &actual_format,
-                                    &nitems,
-                                    &bytes_after,
-                                    &data);
-
-       if (data != NULL) {
-               caja_xid = *(Window *) data;
-               XFree (data);
-       } else {
-               return FALSE;
-       }
-
-       if (actual_type != XA_WINDOW) {
-               return FALSE;
-       }
-       if (actual_format != 32) {
-               return FALSE;
-       }
-
-       wmclass_atom = XInternAtom (GDK_DISPLAY_XDISPLAY(gdk_display_get_default()), "WM_CLASS", False);
-
-       gdk_error_trap_push ();
-
-       retval = XGetWindowProperty (GDK_DISPLAY_XDISPLAY(gdk_display_get_default()),
-                                    caja_xid,
-                                    wmclass_atom,
-                                    0,
-                                    24,
-                                    False,
-                                    XA_STRING,
-                                    &actual_type,
-                                    &actual_format,
-                                    &nitems,
-                                    &bytes_after,
-                                    &data);
-
-       error = gdk_error_trap_pop ();
-
-       if (error == BadWindow) {
-               return FALSE;
-       }
-
-       if (actual_type == XA_STRING &&
-           nitems == 24 &&
-           bytes_after == 0 &&
-           actual_format == 8 &&
-           data != NULL &&
-           !strcmp ((char *)data, "desktop_window") &&
-           !strcmp ((char *)data + strlen ((char *)data) + 1, "Caja")) {
-               running = TRUE;
-       } else {
-               running = FALSE;
-       }
-
-       if (data != NULL) {
-               XFree (data);
-       }
-
-       return running;
-}
-
-static void
-draw_background (MsdBackgroundManager *manager,
-                 gboolean              use_crossfade)
-{
-        GdkDisplay *display;
-        int         n_screens;
-        int         i;
-
-        if (caja_is_running ()) {
-                return;
-        }
-
-        mate_settings_profile_start (NULL);
-
-        display = gdk_display_get_default ();
-        n_screens = gdk_display_get_n_screens (display);
-
-        for (i = 0; i < n_screens; ++i) {
-                GdkScreen *screen;
-                GdkWindow *root_window;
-                GdkPixmap *pixmap;
-
-                screen = gdk_display_get_screen (display, i);
-
-                root_window = gdk_screen_get_root_window (screen);
-
-                pixmap = mate_bg_create_pixmap (manager->priv->bg,
-                                                 root_window,
-                                                 gdk_screen_get_width (screen),
-                                                 gdk_screen_get_height (screen),
-                                                 TRUE);
-
-                if (use_crossfade) {
-                        MateBGCrossfade *fade;
-
-                        fade = mate_bg_set_pixmap_as_root_with_crossfade (screen, pixmap);
-                        g_signal_connect (fade, "finished",
-                                          G_CALLBACK (g_object_unref), NULL);
-                } else {
-                        mate_bg_set_pixmap_as_root (screen, pixmap);
-                }
-
-                g_object_unref (pixmap);
-        }
-
-        mate_settings_profile_end (NULL);
-}
-
-static void
-on_bg_changed (MateBG              *bg,
-               MsdBackgroundManager *manager)
-{
-        draw_background (manager, TRUE);
-}
-
-static void
-on_bg_transitioned (MateBG              *bg,
-                    MsdBackgroundManager *manager)
-{
-        draw_background (manager, FALSE);
-}
-
-static void
-mateconf_changed_callback (MateConfClient          *client,
-                        guint                 cnxn_id,
-                        MateConfEntry           *entry,
-                        MsdBackgroundManager *manager)
-{
-        mate_bg_load_from_preferences (manager->priv->bg,
-                                        manager->priv->client);
-}
-
-static void
-watch_bg_preferences (MsdBackgroundManager *manager)
-{
-        g_assert (manager->priv->bg_notify_id == 0);
-
-        mateconf_client_add_dir (manager->priv->client,
-                              MATE_BG_KEY_DIR,
-                              MATECONF_CLIENT_PRELOAD_NONE,
-                              NULL);
-        manager->priv->bg_notify_id = mateconf_client_notify_add (manager->priv->client,
-                                                               MATE_BG_KEY_DIR,
-                                                               (MateConfClientNotifyFunc)mateconf_changed_callback,
-                                                               manager,
-                                                               NULL,
-                                                               NULL);
-}
-
-static void
-setup_bg (MsdBackgroundManager *manager)
-{
-        g_return_if_fail (manager->priv->bg == NULL);
-
-        manager->priv->bg = mate_bg_new ();
-
-        g_signal_connect (manager->priv->bg,
-                          "changed",
-                          G_CALLBACK (on_bg_changed),
-                          manager);
-
-        g_signal_connect (manager->priv->bg,
-                          "transitioned",
-                          G_CALLBACK (on_bg_transitioned),
-                          manager);
-
-        watch_bg_preferences (manager);
-        mate_bg_load_from_preferences (manager->priv->bg,
-                                        manager->priv->client);
-}
-
-static gboolean
-queue_draw_background (MsdBackgroundManager *manager)
-{
-        manager->priv->timeout_id = 0;
-        if (caja_is_running ()) {
-                return FALSE;
-        }
-        setup_bg (manager);
-        draw_background (manager, FALSE);
-        return FALSE;
-}
-
-static DBusHandlerResult
-on_bus_message (DBusConnection *connection,
-                DBusMessage    *message,
-                void           *user_data)
-{
-        MsdBackgroundManager *manager = user_data;
-
-        if (dbus_message_is_signal (message,
-                                    "org.mate.SessionManager",
-                                    "SessionRunning")) {
-                /* If the session finishes then check if caja is
-                 * running and if not, set the background.
-                 *
-                 * We wait a few seconds after the session is up
-                 * because caja tells the session manager that its
-                 * ready before it sets the background.
-                 */
-                manager->priv->timeout_id = g_timeout_add_seconds (8,
-                                                                   (GSourceFunc)
-                                                                   queue_draw_background,
-                                                                   manager);
-                dbus_connection_remove_filter (connection,
-                                               on_bus_message,
-                                               manager);
-
-                manager->priv->dbus_connection = NULL;
-        }
-
-        return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
-}
-
-static void
-draw_background_after_session_loads (MsdBackgroundManager *manager)
-{
-        DBusConnection *connection;
-
-        connection = dbus_bus_get (DBUS_BUS_SESSION, NULL);
-
-        if (connection == NULL) {
-                return;
-        }
-
-        if (!dbus_connection_add_filter (connection, on_bus_message, manager, NULL)) {
-                return;
-        };
-
-        manager->priv->dbus_connection = connection;
-}
-
-static void
-on_screen_size_changed (GdkScreen            *screen,
-                        MsdBackgroundManager *manager)
-{
-        gboolean caja_show_desktop;
-
-        caja_show_desktop = mateconf_client_get_bool (manager->priv->client,
-                                                       CAJA_SHOW_DESKTOP_KEY,
-                                                       NULL);
-
-        if (!caja_is_running () || !caja_show_desktop) {
-                if (manager->priv->bg == NULL) {
-                        setup_bg (manager);
-                }
-                draw_background (manager, FALSE);
-        }
-}
-
-static void
-disconnect_screen_signals (MsdBackgroundManager *manager)
-{
-        GdkDisplay *display;
-        int         i;
-        int         n_screens;
-
-        display = gdk_display_get_default ();
-        n_screens = gdk_display_get_n_screens (display);
-
-        for (i = 0; i < n_screens; ++i) {
-                GdkScreen *screen;
-                screen = gdk_display_get_screen (display, i);
-                g_signal_handlers_disconnect_by_func (screen,
-                                                      G_CALLBACK (on_screen_size_changed),
-                                                      manager);
-        }
-}
-
-static void
-connect_screen_signals (MsdBackgroundManager *manager)
-{
-        GdkDisplay *display;
-        int         i;
-        int         n_screens;
-
-        display = gdk_display_get_default ();
-        n_screens = gdk_display_get_n_screens (display);
-
-        for (i = 0; i < n_screens; ++i) {
-                GdkScreen *screen;
-                screen = gdk_display_get_screen (display, i);
-                g_signal_connect (screen,
-                                  "monitors-changed",
-                                  G_CALLBACK (on_screen_size_changed),
-                                  manager);
-                g_signal_connect (screen,
-                                  "size-changed",
-                                  G_CALLBACK (on_screen_size_changed),
-                                  manager);
-        }
-}
-
-gboolean
-msd_background_manager_start (MsdBackgroundManager *manager,
-                              GError              **error)
-{
-        gboolean caja_show_desktop;
-
-        g_debug ("Starting background manager");
-        mate_settings_profile_start (NULL);
-
-        manager->priv->client = mateconf_client_get_default ();
-
-        /* If this is set, caja will draw the background and is
-	 * almost definitely in our session.  however, it may not be
-	 * running yet (so is_caja_running() will fail).  so, on
-	 * startup, just don't do anything if this key is set so we
-	 * don't waste time setting the background only to have
-	 * caja overwrite it.
-	 */
-        caja_show_desktop = mateconf_client_get_bool (manager->priv->client,
-                                                       CAJA_SHOW_DESKTOP_KEY,
-                                                       NULL);
-
-        if (!caja_show_desktop) {
-                setup_bg (manager);
-        } else {
-                draw_background_after_session_loads (manager);
-        }
-
-        connect_screen_signals (manager);
-
-        mate_settings_profile_end (NULL);
-
-        return TRUE;
-}
-
-void
-msd_background_manager_stop (MsdBackgroundManager *manager)
-{
-        MsdBackgroundManagerPrivate *p = manager->priv;
-
-        g_debug ("Stopping background manager");
-
-        disconnect_screen_signals (manager);
-
-        if (manager->priv->dbus_connection != NULL) {
-                dbus_connection_remove_filter (manager->priv->dbus_connection,
-                                               on_bus_message,
-                                               manager);
-        }
-
-        if (manager->priv->bg_notify_id != 0) {
-                mateconf_client_remove_dir (manager->priv->client,
-                                         MATE_BG_KEY_DIR,
-                                         NULL);
-                mateconf_client_notify_remove (manager->priv->client,
-                                            manager->priv->bg_notify_id);
-                manager->priv->bg_notify_id = 0;
-        }
-
-        if (p->client != NULL) {
-                g_object_unref (p->client);
-                p->client = NULL;
-        }
-
-        if (p->timeout_id != 0) {
-                g_source_remove (p->timeout_id);
-                p->timeout_id = 0;
-        }
-
-        if (p->bg != NULL) {
-                g_object_unref (p->bg);
-                p->bg = NULL;
-        }
-}
-
-static void
-msd_background_manager_set_property (GObject        *object,
-                                     guint           prop_id,
-                                     const GValue   *value,
-                                     GParamSpec     *pspec)
-{
-        MsdBackgroundManager *self;
-
-        self = MSD_BACKGROUND_MANAGER (object);
-
-        switch (prop_id) {
-        default:
-                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
-                break;
-        }
-}
-
-static void
-msd_background_manager_get_property (GObject        *object,
-                                     guint           prop_id,
-                                     GValue         *value,
-                                     GParamSpec     *pspec)
-{
-        MsdBackgroundManager *self;
-
-        self = MSD_BACKGROUND_MANAGER (object);
-
-        switch (prop_id) {
-        default:
-                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
-                break;
-        }
-}
-
-static GObject *
-msd_background_manager_constructor (GType                  type,
-                                    guint                  n_construct_properties,
-                                    GObjectConstructParam *construct_properties)
-{
-        MsdBackgroundManager      *background_manager;
-        MsdBackgroundManagerClass *klass;
-
-        klass = MSD_BACKGROUND_MANAGER_CLASS (g_type_class_peek (MSD_TYPE_BACKGROUND_MANAGER));
-
-        background_manager = MSD_BACKGROUND_MANAGER (G_OBJECT_CLASS (msd_background_manager_parent_class)->constructor (type,
-                                                                                                                        n_construct_properties,
-                                                                                                                        construct_properties));
-
-        return G_OBJECT (background_manager);
-}
-
-static void
-msd_background_manager_dispose (GObject *object)
-{
-        MsdBackgroundManager *background_manager;
-
-        background_manager = MSD_BACKGROUND_MANAGER (object);
-
-        G_OBJECT_CLASS (msd_background_manager_parent_class)->dispose (object);
-}
-
-static void
-msd_background_manager_class_init (MsdBackgroundManagerClass *klass)
-{
-        GObjectClass   *object_class = G_OBJECT_CLASS (klass);
-
-        object_class->get_property = msd_background_manager_get_property;
-        object_class->set_property = msd_background_manager_set_property;
-        object_class->constructor = msd_background_manager_constructor;
-        object_class->dispose = msd_background_manager_dispose;
-        object_class->finalize = msd_background_manager_finalize;
-
-        g_type_class_add_private (klass, sizeof (MsdBackgroundManagerPrivate));
-}
-
-static void
-msd_background_manager_init (MsdBackgroundManager *manager)
-{
-        manager->priv = MSD_BACKGROUND_MANAGER_GET_PRIVATE (manager);
-}
-
-static void
-msd_background_manager_finalize (GObject *object)
-{
-        MsdBackgroundManager *background_manager;
-
-        g_return_if_fail (object != NULL);
-        g_return_if_fail (MSD_IS_BACKGROUND_MANAGER (object));
-
-        background_manager = MSD_BACKGROUND_MANAGER (object);
-
-        g_return_if_fail (background_manager->priv != NULL);
-
-        G_OBJECT_CLASS (msd_background_manager_parent_class)->finalize (object);
-}
-
-MsdBackgroundManager *
-msd_background_manager_new (void)
-{
-        if (manager_object != NULL) {
-                g_object_ref (manager_object);
-        } else {
-                manager_object = g_object_new (MSD_TYPE_BACKGROUND_MANAGER, NULL);
-                g_object_add_weak_pointer (manager_object,
-                                           (gpointer *) &manager_object);
-        }
-
-        return MSD_BACKGROUND_MANAGER (manager_object);
-}
+//class MsdBackgroundManager
+//{
+	struct MsdBackgroundManagerPrivate {
+		MateConfClient* client;
+		MateBG*         bg;
+		guint           bg_notify_id;
+		guint           timeout_id;
+
+		DBusConnection* dbus_connection;
+	};
+
+	static void
+	msd_background_manager_class_init (MsdBackgroundManagerClass* klass);
+
+	static void
+
+	msd_background_manager_init (MsdBackgroundManager* background_manager);
+
+	static void
+	msd_background_manager_finalize (GObject* object);
+
+	G_DEFINE_TYPE(MsdBackgroundManager, msd_background_manager, G_TYPE_OBJECT)
+
+	static gpointer manager_object = NULL;
+
+	static gboolean
+	caja_is_running (void)
+	{
+		Atom           window_id_atom;
+		Window         caja_xid;
+		Atom           actual_type;
+		int            actual_format;
+		unsigned long  nitems;
+		unsigned long  bytes_after;
+		unsigned char* data;
+		int            retval;
+		Atom           wmclass_atom;
+		gboolean       running;
+		gint           error;
+
+		window_id_atom = XInternAtom(GDK_DISPLAY_XDISPLAY(gdk_display_get_default()),
+		                             "CAJA_DESKTOP_WINDOW_ID", True);
+
+		if (window_id_atom == None)
+		{
+			return FALSE;
+		}
+
+		retval = XGetWindowProperty(GDK_DISPLAY_XDISPLAY(gdk_display_get_default()),
+		                            GDK_ROOT_WINDOW(),
+		                            window_id_atom,
+		                            0,
+		                            1,
+		                            False,
+		                            XA_WINDOW,
+		                            &actual_type,
+		                            &actual_format,
+		                            &nitems,
+		                            &bytes_after,
+		                            &data);
+
+		if (data != NULL)
+		{
+			caja_xid = *(Window*) data;
+			XFree(data);
+		}
+		else
+		{
+			return FALSE;
+		}
+
+		if (actual_type != XA_WINDOW)
+		{
+			return FALSE;
+		}
+
+		if (actual_format != 32)
+		{
+			return FALSE;
+		}
+
+		wmclass_atom = XInternAtom(GDK_DISPLAY_XDISPLAY(gdk_display_get_default()), "WM_CLASS", False);
+
+		gdk_error_trap_push();
+
+		retval = XGetWindowProperty(GDK_DISPLAY_XDISPLAY(gdk_display_get_default()),
+		                            caja_xid,
+		                            wmclass_atom,
+		                            0,
+		                            24,
+		                            False,
+		                            XA_STRING,
+		                            &actual_type,
+		                            &actual_format,
+		                            &nitems,
+		                            &bytes_after,
+		                            &data);
+
+		error = gdk_error_trap_pop();
+
+		if (error == BadWindow)
+		{
+			return FALSE;
+		}
+
+		if (actual_type == XA_STRING &&
+			nitems == 24 &&
+			bytes_after == 0 &&
+			actual_format == 8 &&
+			data != NULL &&
+			!strcmp((char*) data, "desktop_window") &&
+			!strcmp((char*) data + strlen((char*) data) + 1, "Caja"))
+		{
+			running = TRUE;
+		}
+		else
+		{
+			running = FALSE;
+		}
+
+		if (data != NULL)
+		{
+			XFree(data);
+		}
+
+		return running;
+	}
+
+	static void
+	draw_background (MsdBackgroundManager* manager,
+	                 gboolean              use_crossfade)
+	{
+		GdkDisplay* display;
+		int         n_screens;
+		int         i;
+
+		if (caja_is_running())
+		{
+				return;
+		}
+
+		mate_settings_profile_start(NULL);
+
+		display = gdk_display_get_default();
+		n_screens = gdk_display_get_n_screens(display);
+
+		for (i = 0; i < n_screens; ++i)
+		{
+			GdkScreen* screen;
+			GdkWindow* root_window;
+			GdkPixmap* pixmap;
+
+			screen = gdk_display_get_screen(display, i);
+
+			root_window = gdk_screen_get_root_window(screen);
+
+			pixmap = mate_bg_create_pixmap(manager->priv->bg,
+			                               root_window,
+			                               gdk_screen_get_width(screen),
+			                               gdk_screen_get_height(screen),
+			                               TRUE);
+
+			/*
+			if (use_crossfade)
+			{
+				MateBGCrossfade* fade;
+
+				fade = mate_bg_set_pixmap_as_root_with_crossfade(screen, pixmap);
+				g_signal_connect(fade,
+				                 "finished",
+				                 G_CALLBACK (g_object_unref), NULL);
+			} else {*/
+				mate_bg_set_pixmap_as_root(screen, pixmap);
+			/* }*/
+
+			g_object_unref(pixmap);
+		}
+
+		mate_settings_profile_end(NULL);
+	}
+
+	static void
+	on_bg_changed (MateBG*               bg,
+	               MsdBackgroundManager* manager)
+	{
+		draw_background(manager, TRUE);
+	}
+
+	static void
+	on_bg_transitioned (MateBG*               bg,
+	                    MsdBackgroundManager* manager)
+	{
+		draw_background(manager, FALSE);
+	}
+
+	static void
+	mateconf_changed_callback (MateConfClient*          client,
+	                           guint                    cnxn_id,
+	                           MateConfEntry*           entry,
+	                           MsdBackgroundManager*    manager)
+	{
+		mate_bg_load_from_preferences(manager->priv->bg,
+		                              manager->priv->client);
+	}
+
+	static void
+	watch_bg_preferences (MsdBackgroundManager* manager)
+	{
+		g_assert(manager->priv->bg_notify_id == 0);
+
+		mateconf_client_add_dir(manager->priv->client,
+		                        MATE_BG_KEY_DIR,
+		                        MATECONF_CLIENT_PRELOAD_NONE,
+		                        NULL);
+
+		manager->priv->bg_notify_id = mateconf_client_notify_add(manager->priv->client,
+		                                                         MATE_BG_KEY_DIR,
+		                                                         (MateConfClientNotifyFunc)mateconf_changed_callback,
+		                                                         manager,
+		                                                         NULL,
+		                                                         NULL);
+	}
+
+	static void
+	setup_bg (MsdBackgroundManager* manager)
+	{
+		g_return_if_fail(manager->priv->bg == NULL);
+
+		manager->priv->bg = mate_bg_new();
+
+		g_signal_connect(manager->priv->bg,
+		                 "changed",
+		                 G_CALLBACK(on_bg_changed),
+		                 manager);
+
+		/*g_signal_connect(manager->priv->bg,
+		                 "transitioned",
+		                 G_CALLBACK(on_bg_transitioned),
+		                 manager);*/
+
+		watch_bg_preferences(manager);
+		mate_bg_load_from_preferences(manager->priv->bg, manager->priv->client);
+	}
+
+	static gboolean
+	queue_draw_background (MsdBackgroundManager* manager)
+	{
+		manager->priv->timeout_id = 0;
+
+		if (caja_is_running())
+		{
+			return FALSE;
+		}
+
+		setup_bg(manager);
+		draw_background(manager, FALSE);
+
+		return FALSE;
+	}
+
+	static DBusHandlerResult
+	on_bus_message (DBusConnection* connection,
+	                DBusMessage*        message,
+	                void*               user_data)
+	{
+		MsdBackgroundManager* manager = user_data;
+
+		if (dbus_message_is_signal(message, "org.mate.SessionManager", "SessionRunning"))
+		{
+			/* If the session finishes then check if caja is
+			 * running and if not, set the background.
+			 *
+			 * We wait a few seconds after the session is up
+			 * because caja tells the session manager that its
+			 * ready before it sets the background.
+			 */
+			manager->priv->timeout_id = g_timeout_add_seconds(8,
+			                                                  (GSourceFunc) queue_draw_background,
+			                                                  manager);
+			dbus_connection_remove_filter(connection,
+			                              on_bus_message,
+			                              manager);
+
+			manager->priv->dbus_connection = NULL;
+		}
+
+		return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+	}
+
+	static void
+	draw_background_after_session_loads (MsdBackgroundManager* manager)
+	{
+		DBusConnection* connection;
+
+		connection = dbus_bus_get(DBUS_BUS_SESSION, NULL);
+
+		if (connection == NULL)
+		{
+			return;
+		}
+
+		if (!dbus_connection_add_filter(connection, on_bus_message, manager, NULL))
+		{
+			return;
+		}
+
+		manager->priv->dbus_connection = connection;
+	}
+
+	static void
+	on_screen_size_changed (GdkScreen*            screen,
+	                        MsdBackgroundManager* manager)
+	{
+		gboolean caja_show_desktop;
+
+		caja_show_desktop = mateconf_client_get_bool(manager->priv->client,
+		                                             CAJA_SHOW_DESKTOP_KEY,
+		                                             NULL);
+
+		if (!caja_is_running() || !caja_show_desktop)
+		{
+			if (manager->priv->bg == NULL)
+			{
+				setup_bg(manager);
+			}
+
+			draw_background(manager, FALSE);
+		}
+	}
+
+	static void
+	disconnect_screen_signals (MsdBackgroundManager* manager)
+	{
+		GdkDisplay* display;
+		int         i;
+		int         n_screens;
+
+		display = gdk_display_get_default();
+		n_screens = gdk_display_get_n_screens(display);
+
+		for (i = 0; i < n_screens; ++i)
+		{
+			GdkScreen *screen;
+
+			screen = gdk_display_get_screen(display, i);
+
+			g_signal_handlers_disconnect_by_func(screen,
+			                                     G_CALLBACK(on_screen_size_changed),
+			                                     manager);
+		}
+	}
+
+	static void
+	connect_screen_signals (MsdBackgroundManager* manager)
+	{
+		GdkDisplay* display;
+		int         i;
+		int         n_screens;
+
+		display = gdk_display_get_default();
+		n_screens = gdk_display_get_n_screens(display);
+
+		for (i = 0; i < n_screens; ++i)
+		{
+			GdkScreen* screen;
+			screen = gdk_display_get_screen(display, i);
+			g_signal_connect(screen,
+			                 "monitors-changed",
+			                 G_CALLBACK(on_screen_size_changed),
+			                 manager);
+
+			g_signal_connect(screen,
+			                 "size-changed",
+			                 G_CALLBACK(on_screen_size_changed),
+			                 manager);
+		}
+	}
+
+	gboolean
+	msd_background_manager_start (MsdBackgroundManager* manager,
+	                              GError**              error)
+	{
+		gboolean caja_show_desktop;
+
+		g_debug("Starting background manager");
+		mate_settings_profile_start(NULL);
+
+		manager->priv->client = mateconf_client_get_default();
+
+		/* If this is set, caja will draw the background and is
+		 * almost definitely in our session.  however, it may not be
+		 * running yet (so is_caja_running() will fail).  so, on
+		 * startup, just don't do anything if this key is set so we
+		 * don't waste time setting the background only to have
+		 * caja overwrite it.
+		 */
+		caja_show_desktop = mateconf_client_get_bool(manager->priv->client,
+		                                             CAJA_SHOW_DESKTOP_KEY,
+		                                             NULL);
+
+		if (!caja_show_desktop)
+		{
+			setup_bg(manager);
+		}
+		else
+		{
+			draw_background_after_session_loads(manager);
+		}
+
+		connect_screen_signals(manager);
+
+		mate_settings_profile_end(NULL);
+
+		return TRUE;
+	}
+
+	void
+	msd_background_manager_stop (MsdBackgroundManager*  manager)
+	{
+		MsdBackgroundManagerPrivate* p = manager->priv;
+
+		g_debug("Stopping background manager");
+
+		disconnect_screen_signals(manager);
+
+		if (manager->priv->dbus_connection != NULL)
+		{
+			dbus_connection_remove_filter(manager->priv->dbus_connection,
+			                              on_bus_message,
+			                              manager);
+		}
+
+		if (manager->priv->bg_notify_id != 0)
+		{
+			mateconf_client_remove_dir(manager->priv->client,
+			                           MATE_BG_KEY_DIR,
+			                           NULL);
+			mateconf_client_notify_remove(manager->priv->client,
+			                              manager->priv->bg_notify_id);
+			manager->priv->bg_notify_id = 0;
+		}
+
+		if (p->client != NULL)
+		{
+			g_object_unref(p->client);
+			p->client = NULL;
+		}
+
+		if (p->timeout_id != 0)
+		{
+			g_source_remove(p->timeout_id);
+			p->timeout_id = 0;
+		}
+
+		if (p->bg != NULL)
+		{
+			g_object_unref(p->bg);
+			p->bg = NULL;
+		}
+	}
+
+	static void
+	msd_background_manager_set_property (GObject*        object,
+	                                     guint           prop_id,
+	                                     const GValue*   value,
+	                                     GParamSpec*     pspec)
+	{
+		MsdBackgroundManager* self;
+
+		self = MSD_BACKGROUND_MANAGER(object);
+
+		switch (prop_id)
+		{
+			default:
+				G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+				break;
+		}
+	}
+
+	static void
+	msd_background_manager_get_property (GObject*        object,
+	                                     guint           prop_id,
+	                                     GValue*         value,
+	                                     GParamSpec*     pspec)
+	{
+		MsdBackgroundManager* self;
+
+		self = MSD_BACKGROUND_MANAGER(object);
+
+		switch (prop_id)
+		{
+			default:
+				G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+				break;
+		}
+	}
+
+	static GObject*
+	msd_background_manager_constructor (GType                  type,
+	                                    guint                  n_construct_properties,
+	                                    GObjectConstructParam* construct_properties)
+	{
+		MsdBackgroundManager*      background_manager;
+		MsdBackgroundManagerClass* klass;
+
+		klass = MSD_BACKGROUND_MANAGER_CLASS(g_type_class_peek(MSD_TYPE_BACKGROUND_MANAGER));
+
+		background_manager = MSD_BACKGROUND_MANAGER(G_OBJECT_CLASS(msd_background_manager_parent_class)->constructor(type,
+		                                                                                                             n_construct_properties,
+		                                                                                                             construct_properties));
+		return G_OBJECT(background_manager);
+	}
+
+	static void
+	msd_background_manager_dispose (GObject* object)
+	{
+		MsdBackgroundManager* background_manager;
+
+		background_manager = MSD_BACKGROUND_MANAGER(object);
+
+		G_OBJECT_CLASS(msd_background_manager_parent_class)->dispose(object);
+	}
+
+	static void
+	msd_background_manager_class_init (MsdBackgroundManagerClass* klass)
+	{
+		GObjectClass* object_class = G_OBJECT_CLASS(klass);
+
+		object_class->get_property = msd_background_manager_get_property;
+		object_class->set_property = msd_background_manager_set_property;
+		object_class->constructor = msd_background_manager_constructor;
+		object_class->dispose = msd_background_manager_dispose;
+		object_class->finalize = msd_background_manager_finalize;
+
+		g_type_class_add_private(klass, sizeof(MsdBackgroundManagerPrivate));
+	}
+
+	static void
+	msd_background_manager_init (MsdBackgroundManager* manager)
+	{
+		manager->priv = MSD_BACKGROUND_MANAGER_GET_PRIVATE(manager);
+	}
+
+	static void
+	msd_background_manager_finalize (GObject* object)
+	{
+		MsdBackgroundManager* background_manager;
+
+		g_return_if_fail(object != NULL);
+		g_return_if_fail(MSD_IS_BACKGROUND_MANAGER(object));
+
+		background_manager = MSD_BACKGROUND_MANAGER(object);
+
+		g_return_if_fail(background_manager->priv != NULL);
+
+		G_OBJECT_CLASS(msd_background_manager_parent_class)->finalize(object);
+	}
+
+	MsdBackgroundManager*
+	msd_background_manager_new (void)
+	{
+		if (manager_object != NULL)
+		{
+			g_object_ref(manager_object);
+		}
+		else
+		{
+			manager_object = g_object_new(MSD_TYPE_BACKGROUND_MANAGER, NULL);
+
+			g_object_add_weak_pointer(manager_object, (gpointer*) &manager_object);
+		}
+
+		return MSD_BACKGROUND_MANAGER(manager_object);
+	}
+//}