/*
* Copyright © 2013 Lars Uebernickel
*
* 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 2.1 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, see <http://www.gnu.org/licenses/>.
*
* Authors: Lars Uebernickel <lars@uebernic.de>
*/
#include "config.h"
#include "gnotificationbackend.h"
#include "gapplication.h"
#include "giomodule-priv.h"
#include "gnotification-private.h"
#include "gdbusconnection.h"
#include "gactiongroup.h"
#include "gaction.h"
#include "gthemedicon.h"
#include "gfileicon.h"
#include "gfile.h"
#include "gdbusutils.h"
#define G_TYPE_FDO_NOTIFICATION_BACKEND (g_fdo_notification_backend_get_type ())
#define G_FDO_NOTIFICATION_BACKEND(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_FDO_NOTIFICATION_BACKEND, GFdoNotificationBackend))
typedef struct _GFdoNotificationBackend GFdoNotificationBackend;
typedef GNotificationBackendClass GFdoNotificationBackendClass;
struct _GFdoNotificationBackend
{
GNotificationBackend parent;
guint notify_subscription;
GSList *notifications;
};
GType g_fdo_notification_backend_get_type (void);
G_DEFINE_TYPE_WITH_CODE (GFdoNotificationBackend, g_fdo_notification_backend, G_TYPE_NOTIFICATION_BACKEND,
_g_io_modules_ensure_extension_points_registered ();
g_io_extension_point_implement (G_NOTIFICATION_BACKEND_EXTENSION_POINT_NAME,
g_define_type_id, "freedesktop", 0))
typedef struct
{
GFdoNotificationBackend *backend;
gchar *id;
guint32 notify_id;
gchar *default_action;
GVariant *default_action_target;
} FreedesktopNotification;
static void
freedesktop_notification_free (gpointer data)
{
FreedesktopNotification *n = data;
g_free (n->id);
g_free (n->default_action);
if (n->default_action_target)
g_variant_unref (n->default_action_target);
g_slice_free (FreedesktopNotification, n);
}
static FreedesktopNotification *
g_fdo_notification_backend_find_notification (GFdoNotificationBackend *backend,
const gchar *id)
{
GSList *it;
for (it = backend->notifications; it != NULL; it = it->next)
{
FreedesktopNotification *n = it->data;
if (g_str_equal (n->id, id))
return n;
}
return NULL;
}
static FreedesktopNotification *
g_fdo_notification_backend_find_notification_by_notify_id (GFdoNotificationBackend *backend,
guint32 id)
{
GSList *it;
for (it = backend->notifications; it != NULL; it = it->next)
{
FreedesktopNotification *n = it->data;
if (n->notify_id == id)
return n;
}
return NULL;
}
static void
activate_action (GFdoNotificationBackend *backend,
const gchar *name,
GVariant *parameter)
{
GNotificationBackend *g_backend = G_NOTIFICATION_BACKEND (backend);
if (name)
{
if (g_str_has_prefix (name, "app."))
g_action_group_activate_action (G_ACTION_GROUP (g_backend->application), name + 4, parameter);
}
else
{
g_application_activate (g_backend->application);
}
}
static void
notify_signal (GDBusConnection *connection,
const gchar *sender_name,
const gchar *object_path,
const gchar *interface_name,
const gchar *signal_name,
GVariant *parameters,
gpointer user_data)
{
GFdoNotificationBackend *backend = user_data;
guint32 id = 0;
const gchar *action = NULL;
FreedesktopNotification *n;
if (g_str_equal (signal_name, "NotificationClosed") &&
g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(uu)")))
{
g_variant_get (parameters, "(uu)", &id, NULL);
}
else if (g_str_equal (signal_name, "ActionInvoked") &&
g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(us)")))
{
g_variant_get (parameters, "(u&s)", &id, &action);
}
else
return;
n = g_fdo_notification_backend_find_notification_by_notify_id (backend, id);
if (n == NULL)
return;
if (action)
{
if (g_str_equal (action, "default"))
{
activate_action (backend, n->default_action, n->default_action_target);
}
else
{
gchar *name;
GVariant *target;
if (g_action_parse_detailed_name (action, &name, &target, NULL))
{
activate_action (backend, name, target);
g_free (name);
if (target)
g_variant_unref (target);
}
}
}
/* Get the notification again in case the action redrew it */
n = g_fdo_notification_backend_find_notification_by_notify_id (backend, id);
if (n != NULL)
{
backend->notifications = g_slist_remove (backend->notifications, n);
freedesktop_notification_free (n);
}
}
/* Converts a GNotificationPriority to an urgency level as defined by
* the freedesktop spec (0: low, 1: normal, 2: critical).
*/
static guchar
urgency_from_priority (GNotificationPriority priority)
{
switch (priority)
{
case G_NOTIFICATION_PRIORITY_LOW:
return 0;
default:
case G_NOTIFICATION_PRIORITY_NORMAL:
case G_NOTIFICATION_PRIORITY_HIGH:
return 1;
case G_NOTIFICATION_PRIORITY_URGENT:
return 2;
}
}
static void
call_notify (GDBusConnection *con,
GApplication *app,
guint32 replace_id,
GNotification *notification,
GAsyncReadyCallback callback,
gpointer user_data)
{
GVariantBuilder action_builder;
guint n_buttons;
guint i;
GVariantBuilder hints_builder;
GIcon *icon;
GVariant *parameters;
const gchar *body;
guchar urgency;
g_variant_builder_init (&action_builder, G_VARIANT_TYPE_STRING_ARRAY);
if (g_notification_get_default_action (notification, NULL, NULL))
{
g_variant_builder_add (&action_builder, "s", "default");
g_variant_builder_add (&action_builder, "s", "");
}
n_buttons = g_notification_get_n_buttons (notification);
for (i = 0; i < n_buttons; i++)
{
gchar *label;
gchar *action;
GVariant *target;
gchar *detailed_name;
g_notification_get_button (notification, i, &label, &action, &target);
detailed_name = g_action_print_detailed_name (action, target);
/* Actions named 'default' collide with libnotify's naming of the
* default action. Rewriting them to something unique is enough,
* because those actions can never be activated (they aren't
* prefixed with 'app.').
*/
if (g_str_equal (detailed_name, "default"))
{
g_free (detailed_name);
detailed_name = g_dbus_generate_guid ();
}
g_variant_builder_add_value (&action_builder, g_variant_new_take_string (detailed_name));
g_variant_builder_add_value (&action_builder, g_variant_new_take_string (label));
g_free (action);
if (target)
g_variant_unref (target);
}
g_variant_builder_init (&hints_builder, G_VARIANT_TYPE ("a{sv}"));
g_variant_builder_add (&hints_builder, "{sv}", "desktop-entry",
g_variant_new_string (g_application_get_application_id (app)));
urgency = urgency_from_priority (g_notification_get_priority (notification));
g_variant_builder_add (&hints_builder, "{sv}", "urgency", g_variant_new_byte (urgency));
icon = g_notification_get_icon (notification);
if (icon != NULL)
{
if (G_IS_FILE_ICON (icon))
{
GFile *file;
file = g_file_icon_get_file (G_FILE_ICON (icon));
g_variant_builder_add (&hints_builder, "{sv}", "image-path",
g_variant_new_take_string (g_file_get_path (file)));
}
else if (G_IS_THEMED_ICON (icon))
{
const gchar* const* icon_names = g_themed_icon_get_names(G_THEMED_ICON (icon));
/* Take first name from GThemedIcon */
g_variant_builder_add (&hints_builder, "{sv}", "image-path",
g_variant_new_string (icon_names[0]));
}
}
body = g_notification_get_body (notification);
parameters = g_variant_new ("(susssasa{sv}i)",
"", /* app name */
replace_id,
"", /* app icon */
g_notification_get_title (notification),
body ? body : "",
&action_builder,
&hints_builder,
-1); /* expire_timeout */
g_dbus_connection_call (con, "org.freedesktop.Notifications", "/org/freedesktop/Notifications",
"org.freedesktop.Notifications", "Notify",
parameters, G_VARIANT_TYPE ("(u)"),
G_DBUS_CALL_FLAGS_NONE, -1, NULL,
callback, user_data);
}
static void
notification_sent (GObject *source_object,
GAsyncResult *result,
gpointer user_data)
{
FreedesktopNotification *n = user_data;
GVariant *val;
GError *error = NULL;
static gboolean warning_printed = FALSE;
val = g_dbus_connection_call_finish (G_DBUS_CONNECTION (source_object), result, &error);
if (val)
{
g_variant_get (val, "(u)", &n->notify_id);
g_variant_unref (val);
}
else
{
if (!warning_printed)
{
g_warning ("unable to send notifications through org.freedesktop.Notifications: %s",
error->message);
warning_printed = TRUE;
}
n->backend->notifications = g_slist_remove (n->backend->notifications, n);
freedesktop_notification_free (n);
g_error_free (error);
}
}
static void
g_fdo_notification_backend_dispose (GObject *object)
{
GFdoNotificationBackend *backend = G_FDO_NOTIFICATION_BACKEND (object);
if (backend->notify_subscription)
{
GDBusConnection *session_bus;
session_bus = G_NOTIFICATION_BACKEND (backend)->dbus_connection;
g_dbus_connection_signal_unsubscribe (session_bus, backend->notify_subscription);
backend->notify_subscription = 0;
}
if (backend->notifications)
{
g_slist_free_full (backend->notifications, freedesktop_notification_free);
backend->notifications = NULL;
}
G_OBJECT_CLASS (g_fdo_notification_backend_parent_class)->dispose (object);
}
static gboolean
g_fdo_notification_backend_is_supported (void)
{
/* This is the fallback backend with the lowest priority. To avoid an
* unnecessary synchronous dbus call to check for
* org.freedesktop.Notifications, this function always succeeds. A
* warning will be printed when sending the first notification fails.
*/
return TRUE;
}
static void
g_fdo_notification_backend_send_notification (GNotificationBackend *backend,
const gchar *id,
GNotification *notification)
{
GFdoNotificationBackend *self = G_FDO_NOTIFICATION_BACKEND (backend);
FreedesktopNotification *n;
if (self->notify_subscription == 0)
{
self->notify_subscription =
g_dbus_connection_signal_subscribe (backend->dbus_connection,
"org.freedesktop.Notifications",
"org.freedesktop.Notifications", NULL,
"/org/freedesktop/Notifications", NULL,
G_DBUS_SIGNAL_FLAGS_NONE,
notify_signal, backend, NULL);
}
n = g_fdo_notification_backend_find_notification (self, id);
if (n == NULL)
{
n = g_slice_new0 (FreedesktopNotification);
n->backend = self;
n->id = g_strdup (id);
n->notify_id = 0;
n->backend->notifications = g_slist_prepend (n->backend->notifications, n);
}
else
{
/* Only clear default action. All other fields are still valid */
g_clear_pointer (&n->default_action, g_free);
g_clear_pointer (&n->default_action_target, g_variant_unref);
}
g_notification_get_default_action (notification, &n->default_action, &n->default_action_target);
call_notify (backend->dbus_connection, backend->application, n->notify_id, notification, notification_sent, n);
}
static void
g_fdo_notification_backend_withdraw_notification (GNotificationBackend *backend,
const gchar *id)
{
GFdoNotificationBackend *self = G_FDO_NOTIFICATION_BACKEND (backend);
FreedesktopNotification *n;
n = g_fdo_notification_backend_find_notification (self, id);
if (n)
{
if (n->notify_id > 0)
{
g_dbus_connection_call (backend->dbus_connection,
"org.freedesktop.Notifications",
"/org/freedesktop/Notifications",
"org.freedesktop.Notifications", "CloseNotification",
g_variant_new ("(u)", n->notify_id), NULL,
G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
}
self->notifications = g_slist_remove (self->notifications, n);
freedesktop_notification_free (n);
}
}
static void
g_fdo_notification_backend_init (GFdoNotificationBackend *backend)
{
}
static void
g_fdo_notification_backend_class_init (GFdoNotificationBackendClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GNotificationBackendClass *backend_class = G_NOTIFICATION_BACKEND_CLASS (class);
object_class->dispose = g_fdo_notification_backend_dispose;
backend_class->is_supported = g_fdo_notification_backend_is_supported;
backend_class->send_notification = g_fdo_notification_backend_send_notification;
backend_class->withdraw_notification = g_fdo_notification_backend_withdraw_notification;
}