diff options
Diffstat (limited to 'libindicator/indicator-service.c')
| -rw-r--r-- | libindicator/indicator-service.c | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/libindicator/indicator-service.c b/libindicator/indicator-service.c new file mode 100644 index 0000000..69422c5 --- /dev/null +++ b/libindicator/indicator-service.c @@ -0,0 +1,334 @@ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif +#include <dbus/dbus-glib-bindings.h> +#include <dbus/dbus-glib-lowlevel.h> + +#include "indicator-service.h" + +/* DBus Prototypes */ +static gboolean _indicator_service_server_watch (IndicatorService * service, DBusGMethodInvocation * method); + +#include "indicator-service-server.h" +#include "dbus-shared.h" + +/* Private Stuff */ +typedef struct _IndicatorServicePrivate IndicatorServicePrivate; + +struct _IndicatorServicePrivate { + gchar * name; + DBusGProxy * dbus_proxy; + guint timeout; + GList * watchers; +}; + +/* Signals Stuff */ +enum { + SHUTDOWN, + LAST_SIGNAL +}; + +static guint signals[LAST_SIGNAL] = { 0 }; + +/* Properties */ +/* Enum for the properties so that they can be quickly + found and looked up. */ +enum { + PROP_0, + PROP_NAME, +}; + +/* The strings so that they can be slowly looked up. */ +#define PROP_NAME_S "name" + +/* GObject Stuff */ +#define INDICATOR_SERVICE_GET_PRIVATE(o) \ + (G_TYPE_INSTANCE_GET_PRIVATE ((o), INDICATOR_SERVICE_TYPE, IndicatorServicePrivate)) + +static void indicator_service_class_init (IndicatorServiceClass *klass); +static void indicator_service_init (IndicatorService *self); +static void indicator_service_dispose (GObject *object); +static void indicator_service_finalize (GObject *object); + +/* Other prototypes */ +static void set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); +static void get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); +static void try_and_get_name (IndicatorService * service); + +G_DEFINE_TYPE (IndicatorService, indicator_service, G_TYPE_OBJECT); + +static void +indicator_service_class_init (IndicatorServiceClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + + g_type_class_add_private (klass, sizeof (IndicatorServicePrivate)); + + object_class->dispose = indicator_service_dispose; + object_class->finalize = indicator_service_finalize; + + /* Property funcs */ + object_class->set_property = set_property; + object_class->get_property = get_property; + + /* Properties */ + g_object_class_install_property(object_class, PROP_NAME, + g_param_spec_string(PROP_NAME_S, + "The DBus name for this service", + "This is the name that should be used on DBus for this service.", + NULL, + G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); + + /* Signals */ + + /** + IndicatorService::shutdown: + @arg0: The #IndicatorService object + + Signaled when the service should shutdown as no one + is listening anymore. + */ + signals[SHUTDOWN] = g_signal_new (INDICATOR_SERVICE_SIGNAL_SHUTDOWN, + G_TYPE_FROM_CLASS(klass), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET (IndicatorServiceClass, shutdown), + NULL, NULL, + g_cclosure_marshal_VOID__VOID, + G_TYPE_NONE, 0, G_TYPE_NONE); + + /* Initialize the object as a DBus type */ + dbus_g_object_type_install_info(INDICATOR_SERVICE_TYPE, + &dbus_glib__indicator_service_server_object_info); + + return; +} + +static void +indicator_service_init (IndicatorService *self) +{ + IndicatorServicePrivate * priv = INDICATOR_SERVICE_GET_PRIVATE(self); + + /* Get the private variables in a decent state */ + priv->name = NULL; + priv->dbus_proxy = NULL; + priv->timeout = 0; + priv->watchers = NULL; + + /* Start talkin' dbus */ + GError * error = NULL; + DBusGConnection * bus = dbus_g_bus_get(DBUS_BUS_STARTER, &error); + if (error != NULL) { + g_error("Unable to get starter bus: %s", error->message); + g_error_free(error); + + /* Okay, fine let's try the session bus then. */ + /* I think this should automatically, but I can't find confirmation + of that, so we're putting the extra little code in here. */ + error = NULL; + bus = dbus_g_bus_get(DBUS_BUS_SESSION, &error); + if (error != NULL) { + g_error("Unable to get session bus: %s", error->message); + g_error_free(error); + return; + } + } + + priv->dbus_proxy = dbus_g_proxy_new_for_name_owner(bus, + DBUS_SERVICE_DBUS, + DBUS_PATH_DBUS, + DBUS_INTERFACE_DBUS, + &error); + if (error != NULL) { + g_error("Unable to get the proxy to DBus: %s", error->message); + g_error_free(error); + return; + } + + dbus_g_connection_register_g_object(bus, + INDICATOR_SERVICE_OBJECT, + G_OBJECT(self)); + + return; +} + +static void +indicator_service_dispose (GObject *object) +{ + IndicatorServicePrivate * priv = INDICATOR_SERVICE_GET_PRIVATE(object); + + if (priv->dbus_proxy != NULL) { + g_object_unref(G_OBJECT(priv->dbus_proxy)); + priv->dbus_proxy = NULL; + } + + if (priv->timeout != 0) { + g_source_remove(priv->timeout); + priv->timeout = 0; + } + + G_OBJECT_CLASS (indicator_service_parent_class)->dispose (object); + return; +} + +static void +indicator_service_finalize (GObject *object) +{ + IndicatorServicePrivate * priv = INDICATOR_SERVICE_GET_PRIVATE(object); + + if (priv->name != NULL) { + g_free(priv->name); + } + + if (priv->watchers != NULL) { + g_list_foreach(priv->watchers, (GFunc)g_free, NULL); + g_list_free(priv->watchers); + priv->watchers = NULL; + } + + G_OBJECT_CLASS (indicator_service_parent_class)->finalize (object); + return; +} + +static void +set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) +{ + IndicatorService * self = INDICATOR_SERVICE(object); + g_return_if_fail(self != NULL); + + IndicatorServicePrivate * priv = INDICATOR_SERVICE_GET_PRIVATE(self); + g_return_if_fail(priv != NULL); + + switch (prop_id) { + /* *********************** */ + case PROP_NAME: + if (G_VALUE_HOLDS_STRING(value)) { + if (priv->name != NULL) { + g_error("Name can not be set twice!"); + return; + } + priv->name = g_value_dup_string(value); + try_and_get_name(self); + } else { + g_warning("Name property requires a string value."); + } + break; + /* *********************** */ + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } + + return; +} + +static void +get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) +{ + IndicatorService * self = INDICATOR_SERVICE(object); + g_return_if_fail(self != NULL); + + IndicatorServicePrivate * priv = INDICATOR_SERVICE_GET_PRIVATE(self); + g_return_if_fail(priv != NULL); + + switch (prop_id) { + /* *********************** */ + case PROP_NAME: + if (G_VALUE_HOLDS_STRING(value)) { + g_value_set_string(value, priv->name); + } else { + g_warning("Name property requires a string value."); + } + break; + /* *********************** */ + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } + + return; +} + +static gboolean +timeout_no_watchers (gpointer data) +{ + g_signal_emit(G_OBJECT(data), signals[SHUTDOWN], 0, TRUE); + return FALSE; +} + +static void +try_and_get_name_cb (DBusGProxy * proxy, guint status, GError * error, gpointer data) +{ + IndicatorService * service = INDICATOR_SERVICE(data); + g_return_if_fail(service != NULL); + + if (status != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER && status != DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER) { + /* The already owner seems like it shouldn't ever + happen, but I have a hard time throwing an error + on it as we did achieve our goals. */ + g_signal_emit(G_OBJECT(data), signals[SHUTDOWN], 0, TRUE); + return; + } + + IndicatorServicePrivate * priv = INDICATOR_SERVICE_GET_PRIVATE(service); + priv->timeout = g_timeout_add(500, timeout_no_watchers, service); + + return; +} + +static void +try_and_get_name (IndicatorService * service) +{ + IndicatorServicePrivate * priv = INDICATOR_SERVICE_GET_PRIVATE(service); + g_return_if_fail(priv->dbus_proxy != NULL); + g_return_if_fail(priv->name != NULL); + + org_freedesktop_DBus_request_name_async(priv->dbus_proxy, + priv->name, + DBUS_NAME_FLAG_DO_NOT_QUEUE, + try_and_get_name_cb, + service); + + return; +} + +static gboolean +_indicator_service_server_watch (IndicatorService * service, DBusGMethodInvocation * method) +{ + g_return_val_if_fail(INDICATOR_IS_SERVICE(service), FALSE); + IndicatorServicePrivate * priv = INDICATOR_SERVICE_GET_PRIVATE(service); + + priv->watchers = g_list_append(priv->watchers, + g_strdup(dbus_g_method_get_sender(method))); + + if (priv->timeout != 0) { + g_source_remove(priv->timeout); + priv->timeout = 0; + } + + dbus_g_method_return(method, 1); + return TRUE; +} + +/* API */ + +/** + indicator_service_new: + @name: The name for the service on dbus + + This function creates the service on DBus and tries to + get a well-known name specified in @name. If the name + can't be estabilished then the #IndicatorService::shutdown + signal will be sent. + + Return value: A brand new #IndicatorService object or #NULL + if there is an error. +*/ +IndicatorService * +indicator_service_new (gchar * name) +{ + GObject * obj = g_object_new(INDICATOR_SERVICE_TYPE, + PROP_NAME_S, name, + NULL); + + return INDICATOR_SERVICE(obj); +} |