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/*
* dbus-spy.c - A gobject subclass to watch dbus for org.freedesktop.Notification.Notify messages.
*/
#include "dbus-spy.h"
enum {
MESSAGE_RECEIVED,
LAST_SIGNAL
};
typedef struct _IdleMessage IdleMessage;
struct _IdleMessage
{
DBusSpy *spy;
Notification *note;
};
static guint signals[LAST_SIGNAL];
static void dbus_spy_class_init(DBusSpyClass *klass);
static void dbus_spy_init(DBusSpy *self);
static void dbus_spy_dispose(GObject *object);
static void add_filter(DBusSpy *self);
static void bus_get_cb(GObject *source_object, GAsyncResult *res, gpointer user_data);
static GDBusMessage *message_filter(GDBusConnection *connection, GDBusMessage *message,
gboolean incoming, gpointer user_data);
static gboolean idle_message_emit(gpointer user_data);
#define MATCH_STRING "eavesdrop=true,type='method_call',interface='org.freedesktop.Notifications',member='Notify'"
G_DEFINE_TYPE_WITH_PRIVATE(DBusSpy, dbus_spy, G_TYPE_OBJECT);
static void
dbus_spy_class_init(DBusSpyClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS(klass);
object_class->dispose = dbus_spy_dispose;
signals[MESSAGE_RECEIVED] =
g_signal_new(DBUS_SPY_SIGNAL_MESSAGE_RECEIVED,
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(DBusSpyClass, message_received),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE,
1, NOTIFICATION_TYPE);
}
static void
bus_get_cb(GObject *source_object, GAsyncResult *res, gpointer user_data)
{
GError *error = NULL;
GDBusConnection *connection = g_bus_get_finish(res, &error);
if(error != NULL) {
g_warning("Could not get a connection to the dbus session bus: %s\n", error->message);
g_error_free(error);
return;
}
DBusSpy *self = DBUS_SPY(user_data);
g_return_if_fail(self != NULL);
if(self->priv->connection_cancel != NULL) {
g_object_unref(self->priv->connection_cancel);
self->priv->connection_cancel = NULL;
}
self->priv->connection = connection;
add_filter(self);
}
static void
add_filter(DBusSpy *self)
{
GDBusMessage *message;
GVariant *body;
GError *error = NULL;
message = g_dbus_message_new_method_call("org.freedesktop.DBus", "/org/freedesktop/DBus",
"org.freedesktop.DBus", "AddMatch");
body = g_variant_new_parsed("(%s,)", MATCH_STRING);
g_dbus_message_set_body(message, body);
g_dbus_connection_send_message(self->priv->connection,
message,
G_DBUS_SEND_MESSAGE_FLAGS_NONE,
NULL,
&error);
if(error != NULL) {
g_warning("Failed to send AddMatch message: %s\n", error->message);
g_error_free(error);
return;
}
g_dbus_connection_add_filter(self->priv->connection, message_filter, self, NULL);
}
static GDBusMessage*
message_filter(GDBusConnection *connection, GDBusMessage *message, gboolean incoming, gpointer user_data)
{
if(!incoming) return message;
GDBusMessageType type = g_dbus_message_get_message_type(message);
const gchar *interface = g_dbus_message_get_interface(message);
const gchar *member = g_dbus_message_get_member(message);
if((type == G_DBUS_MESSAGE_TYPE_METHOD_CALL)
&& (g_strcmp0(interface, "org.freedesktop.Notifications") == 0)
&& (g_strcmp0(member, "Notify") == 0))
{
DBusSpy *spy = DBUS_SPY(user_data);
Notification *note = notification_new_from_dbus_message(message);
IdleMessage *im = g_new0(IdleMessage, 1);
im->spy = spy;
im->note = note;
g_idle_add(idle_message_emit, im);
g_object_unref(message);
message = NULL;
}
return message;
}
static gboolean
idle_message_emit(gpointer user_data)
{
IdleMessage *message = (IdleMessage *)user_data;
g_signal_emit(message->spy, signals[MESSAGE_RECEIVED], 0, message->note);
g_free(message);
return FALSE;
}
static void
dbus_spy_init(DBusSpy *self)
{
self->priv = dbus_spy_get_instance_private(self);
self->priv->connection = NULL;
self->priv->connection_cancel = g_cancellable_new();
g_bus_get(G_BUS_TYPE_SESSION,
self->priv->connection_cancel,
bus_get_cb,
self);
}
static void
dbus_spy_dispose(GObject *object)
{
DBusSpy *self = DBUS_SPY(object);
if(self->priv->connection_cancel != NULL) {
g_cancellable_cancel(self->priv->connection_cancel);
g_object_unref(self->priv->connection_cancel);
self->priv->connection_cancel = NULL;
}
if(self->priv->connection != NULL) {
g_dbus_connection_close(self->priv->connection, NULL, NULL, NULL);
g_object_unref(self->priv->connection);
self->priv->connection = NULL;
}
G_OBJECT_CLASS(dbus_spy_parent_class)->dispose(object);
}
DBusSpy*
dbus_spy_new(void)
{
return DBUS_SPY(g_object_new(DBUS_SPY_TYPE, NULL));
}
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