gio/gwin32notificationbackend.c

   1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
   2 /* GIO - GLib Input, Output and Streaming Library
   3  *
   4  * Copyright © 2018 Endless Mobile, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General
  17  * Public License along with this library; if not, see
  18  * <http://www.gnu.org/licenses/>.
  19  *
  20  * Authors:
  21  *  - Philip Withnall <withnall@endlessm.com>
  22  */
  23
  24 #include "config.h"
  25
  26 #include "gnotificationbackend.h"
  27
  28 #include "giomodule-priv.h"
  29 #include "gnotification-private.h"
  30
  31 #define G_TYPE_WIN32_NOTIFICATION_BACKEND  (g_win32_notification_backend_get_type ())
  32 #define G_WIN32_NOTIFICATION_BACKEND(o)    (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_WIN32_NOTIFICATION_BACKEND, GWin32NotificationBackend))
  33
  34 typedef struct _GWin32NotificationBackend GWin32NotificationBackend;
  35 typedef GNotificationBackendClass         GWin32NotificationBackendClass;
  36
  37 struct _GWin32NotificationBackend
  38 {
  39   GNotificationBackend parent;
  40 };
  41
  42 GType g_win32_notification_backend_get_type (void);
  43
  44 G_DEFINE_TYPE_WITH_CODE (GWin32NotificationBackend, g_win32_notification_backend, G_TYPE_NOTIFICATION_BACKEND,
  45   _g_io_modules_ensure_extension_points_registered ();
  46   g_io_extension_point_implement (G_NOTIFICATION_BACKEND_EXTENSION_POINT_NAME,
  47                                   g_define_type_id, "win32", 0))
  48
  49 static gboolean
  50 g_win32_notification_backend_is_supported (void)
  51 {
  52   /* This is the only backend supported on Windows, and always needs to be
  53    * present to avoid no backend being selected. */
  54   return TRUE;
  55 }
  56
  57 static void
  58 g_win32_notification_backend_send_notification (GNotificationBackend *backend,
  59                                                 const gchar          *id,
  60                                                 GNotification        *notification)
  61 {
  62   static gsize warned = 0;
  63
  64   /* FIXME: See https://bugzilla.gnome.org/show_bug.cgi?id=776583. This backend
  65    * exists purely to stop crashes when applications use g_notification*()
  66    * on Windows, by providing a dummy backend implementation. (The alternative
  67    * was to modify all of the backend call sites in g_notification*(), which
  68    * seemed less scalable.) */
  69   if (g_once_init_enter (&warned))
  70     {
  71       g_warning ("Notifications are not yet supported on Windows.");
  72       g_once_init_leave (&warned, 1);
  73     }
  74 }
  75
  76 static void
  77 g_win32_notification_backend_withdraw_notification (GNotificationBackend *backend,
  78                                                     const gchar          *id)
  79 {
  80   /* FIXME: Nothing needs doing here until send_notification() is implemented. */
  81 }
  82
  83 static void
  84 g_win32_notification_backend_init (GWin32NotificationBackend *backend)
  85 {
  86 }
  87
  88 static void
  89 g_win32_notification_backend_class_init (GWin32NotificationBackendClass *class)
  90 {
  91   GNotificationBackendClass *backend_class = G_NOTIFICATION_BACKEND_CLASS (class);
  92
  93   backend_class->is_supported = g_win32_notification_backend_is_supported;
  94   backend_class->send_notification = g_win32_notification_backend_send_notification;
  95   backend_class->withdraw_notification = g_win32_notification_backend_withdraw_notification;
  96 }