-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);

-}

-#define MSD_TYPE_BACKGROUND_MANAGER (msd_background_manager_get_type ())

-#define MSD_BACKGROUND_MANAGER(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), MSD_TYPE_BACKGROUND_MANAGER, MsdBackgroundManager))

-#define MSD_BACKGROUND_MANAGER_CLASS(k) (G_TYPE_CHECK_CLASS_CAST((k), MSD_TYPE_BACKGROUND_MANAGER, MsdBackgroundManagerClass))

-#define MSD_IS_BACKGROUND_MANAGER(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), MSD_TYPE_BACKGROUND_MANAGER))

-#define MSD_IS_BACKGROUND_MANAGER_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), MSD_TYPE_BACKGROUND_MANAGER))

-#define MSD_BACKGROUND_MANAGER_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), MSD_TYPE_BACKGROUND_MANAGER, MsdBackgroundManagerClass))

-

-typedef struct MsdBackgroundManagerPrivate MsdBackgroundManagerPrivate;

-

-typedef struct

-{

- GObject parent;

- MsdBackgroundManagerPrivate *priv;

-} MsdBackgroundManager;

-

-typedef struct

-{

- GObjectClass parent_class;

-} MsdBackgroundManagerClass;

-

-GType msd_background_manager_get_type (void);

-

-MsdBackgroundManager * msd_background_manager_new (void);

-gboolean msd_background_manager_start (MsdBackgroundManager *manager,

- GError **error);

-void msd_background_manager_stop (MsdBackgroundManager *manager);

-struct MsdBackgroundPluginPrivate {

- MsdBackgroundManager *manager;

-};

-#define MSD_BACKGROUND_PLUGIN_GET_PRIVATE(object) (G_TYPE_INSTANCE_GET_PRIVATE ((object), MSD_TYPE_BACKGROUND_PLUGIN, MsdBackgroundPluginPrivate))

-MATE_SETTINGS_PLUGIN_REGISTER (MsdBackgroundPlugin, msd_background_plugin)

-static void

-msd_background_plugin_init (MsdBackgroundPlugin *plugin)

-{

- plugin->priv = MSD_BACKGROUND_PLUGIN_GET_PRIVATE (plugin);

- g_debug ("MsdBackgroundPlugin initializing");

- plugin->priv->manager = msd_background_manager_new ();

-}

-static void

-msd_background_plugin_finalize (GObject *object)

-{

- MsdBackgroundPlugin *plugin;

- g_return_if_fail (object != NULL);

- g_return_if_fail (MSD_IS_BACKGROUND_PLUGIN (object));

- g_debug ("MsdBackgroundPlugin finalizing");

- plugin = MSD_BACKGROUND_PLUGIN (object);

- g_return_if_fail (plugin->priv != NULL);

- if (plugin->priv->manager != NULL) {

- g_object_unref (plugin->priv->manager);

- }

- G_OBJECT_CLASS (msd_background_plugin_parent_class)->finalize (object);

-}

-static void

-impl_activate (MateSettingsPlugin *plugin)

-{

- gboolean res;

- GError *error;

- g_debug ("Activating background plugin");

- error = NULL;

- res = msd_background_manager_start (MSD_BACKGROUND_PLUGIN (plugin)->priv->manager, &error);

- if (! res) {

- g_warning ("Unable to start background manager: %s", error->message);

- g_error_free (error);

- }

-}

-static void

-impl_deactivate (MateSettingsPlugin *plugin)

-{

- g_debug ("Deactivating background plugin");

- msd_background_manager_stop (MSD_BACKGROUND_PLUGIN (plugin)->priv->manager);

-}

-static void

-msd_background_plugin_class_init (MsdBackgroundPluginClass *klass)

-{

- GObjectClass *object_class = G_OBJECT_CLASS (klass);

- MateSettingsPluginClass *plugin_class = MATE_SETTINGS_PLUGIN_CLASS (klass);

- object_class->finalize = msd_background_plugin_finalize;

- plugin_class->activate = impl_activate;

- plugin_class->deactivate = impl_deactivate;

- g_type_class_add_private (klass, sizeof (MsdBackgroundPluginPrivate));

-}

-#define MSD_TYPE_BACKGROUND_PLUGIN (msd_background_plugin_get_type ())

-#define MSD_BACKGROUND_PLUGIN(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), MSD_TYPE_BACKGROUND_PLUGIN, MsdBackgroundPlugin))

-#define MSD_BACKGROUND_PLUGIN_CLASS(k) (G_TYPE_CHECK_CLASS_CAST((k), MSD_TYPE_BACKGROUND_PLUGIN, MsdBackgroundPluginClass))

-#define MSD_IS_BACKGROUND_PLUGIN(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), MSD_TYPE_BACKGROUND_PLUGIN))

-#define MSD_IS_BACKGROUND_PLUGIN_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), MSD_TYPE_BACKGROUND_PLUGIN))

-#define MSD_BACKGROUND_PLUGIN_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), MSD_TYPE_BACKGROUND_PLUGIN, MsdBackgroundPluginClass))

-

-typedef struct MsdBackgroundPluginPrivate MsdBackgroundPluginPrivate;

-

-typedef struct

-{

- MateSettingsPlugin parent;

- MsdBackgroundPluginPrivate *priv;

-} MsdBackgroundPlugin;

-

-typedef struct

-{

- MateSettingsPluginClass parent_class;

-} MsdBackgroundPluginClass;

-

-GType msd_background_plugin_get_type (void) G_GNUC_CONST;

-

-/* All the plugins must implement this function */

-G_MODULE_EXPORT GType register_mate_settings_plugin (GTypeModule *module);

-idle (MsdBackgroundManager *manager)

- msd_background_manager_start (manager, NULL);

- return FALSE;

-main (int argc, char *argv[])

- MsdBackgroundManager *manager;

- bindtextdomain (GETTEXT_PACKAGE, MATE_SETTINGS_LOCALEDIR);

- bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");

- textdomain (GETTEXT_PACKAGE);

- setlocale (LC_ALL, "");

- gtk_init (&argc, &argv);

- manager = msd_background_manager_new ();

- g_idle_add ((GSourceFunc)idle, manager);

- gtk_main ();

- return 0;