shell/ev-media-player-keys.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * Copyright (C) 2007 Jan Arne Petersen <jap@gnome.org>
   4  * Copyright (C) 2008 Bastien Nocera <hadess@hadess.net>
   5  * Copyright © 2010 Christian Persch
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA.
  20  *
  21  */
  22
  23 #include "config.h"
  24
  25 #include "ev-media-player-keys.h"
  26
  27 #include <string.h>
  28 #include <glib.h>
  29 #include <gio/gio.h>
  30
  31 #define SD_NAME        "org.gnome.SettingsDaemon"
  32 #define SD_OBJECT_PATH "/org/gnome/SettingsDaemon/MediaKeys"
  33 #define SD_INTERFACE   "org.gnome.SettingsDaemon.MediaKeys"
  34
  35 enum {
  36         KEY_PRESSED,
  37         LAST_SIGNAL
  38 };
  39
  40 struct _EvMediaPlayerKeys
  41 {
  42         GObject        parent;
  43
  44         GDBusProxy *proxy;
  45         guint watch_id;
  46 };
  47
  48 struct _EvMediaPlayerKeysClass
  49 {
  50         GObjectClass parent_class;
  51
  52         /* Signals */
  53         void (* key_pressed) (EvMediaPlayerKeys *keys,
  54                               const gchar       *key);
  55 };
  56
  57 static guint signals[LAST_SIGNAL];
  58
  59 G_DEFINE_TYPE (EvMediaPlayerKeys, ev_media_player_keys, G_TYPE_OBJECT)
  60
  61 static void ev_media_player_keys_finalize (GObject *object);
  62
  63 static void
  64 ev_media_player_keys_class_init (EvMediaPlayerKeysClass *klass)
  65 {
  66         GObjectClass *object_class = G_OBJECT_CLASS (klass);
  67
  68         object_class->finalize = ev_media_player_keys_finalize;
  69
  70         signals[KEY_PRESSED] =
  71                 g_signal_new ("key_pressed",
  72                               EV_TYPE_MEDIA_PLAYER_KEYS,
  73                               G_SIGNAL_RUN_LAST,
  74                               G_STRUCT_OFFSET (EvMediaPlayerKeysClass, key_pressed),
  75                               NULL, NULL,
  76                               g_cclosure_marshal_VOID__STRING,
  77                               G_TYPE_NONE,
  78                               1, G_TYPE_STRING);
  79 }
  80
  81 static void
  82 ev_media_player_keys_grab_keys (EvMediaPlayerKeys *keys)
  83 {
  84         /*
  85          * The uint as second argument is time. We give a very low value so that
  86          * if a media player is there it gets higher priority on the keys (0 is
  87          * a special value having maximum priority).
  88          */
  89         g_dbus_proxy_call (keys->proxy,
  90                            "GrabMediaPlayerKeys",
  91                            g_variant_new ("(su)", "Evince", 1),
  92                            G_DBUS_CALL_FLAGS_NO_AUTO_START,
  93                            -1,
  94                            NULL, NULL, NULL);
  95 }
  96
  97 static void
  98 ev_media_player_keys_release_keys (EvMediaPlayerKeys *keys)
  99 {
 100         g_dbus_proxy_call (keys->proxy,
 101                            "ReleaseMediaPlayerKeys",
 102                            g_variant_new ("(s)", "Evince"),
 103                            G_DBUS_CALL_FLAGS_NO_AUTO_START,
 104                            -1,
 105                            NULL, NULL, NULL);
 106 }
 107
 108 static void
 109 media_player_key_pressed_cb (GDBusProxy *proxy,
 110                              gchar      *sender_name,
 111                              gchar      *signal_name,
 112                              GVariant   *parameters,
 113                              gpointer    user_data)
 114 {
 115         const char *application, *key;
 116
 117         if (g_strcmp0 (sender_name, SD_NAME) != 0)
 118                 return;
 119
 120         if (g_strcmp0 (signal_name, "MediaPlayerKeyPressed") != 0)
 121                 return;
 122
 123         if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(ss)")))
 124                 return;
 125
 126         g_variant_get (parameters, "(&s&s)", &application, &key);
 127
 128         if (strcmp ("Evince", application) == 0) {
 129                 g_signal_emit (user_data, signals[KEY_PRESSED], 0, key);
 130         }
 131 }
 132
 133 static void
 134 mediakeys_service_appeared_cb (GDBusConnection *connection,
 135                                const gchar     *name,
 136                                const gchar     *name_owner,
 137                                GDBusProxy      *proxy,
 138                                gpointer         user_data)
 139 {
 140         EvMediaPlayerKeys *keys = EV_MEDIA_PLAYER_KEYS (user_data);
 141
 142         keys->proxy = g_object_ref (proxy);
 143         g_signal_connect (keys->proxy, "g-signal",
 144                           G_CALLBACK (media_player_key_pressed_cb),
 145                           keys);
 146
 147         ev_media_player_keys_grab_keys (keys);
 148 }
 149
 150 static void
 151 mediakeys_service_disappeared_cb (GDBusConnection *connection,
 152                                   const gchar     *name,
 153                                   gpointer         user_data)
 154 {
 155         EvMediaPlayerKeys *keys = EV_MEDIA_PLAYER_KEYS (user_data);
 156
 157         if (keys->proxy) {
 158                 g_object_unref (keys->proxy);
 159                 keys->proxy = NULL;
 160         }
 161 }
 162
 163 static void
 164 ev_media_player_keys_init (EvMediaPlayerKeys *keys)
 165 {
 166         keys->watch_id = g_bus_watch_proxy (G_BUS_TYPE_SESSION,
 167                                             SD_NAME,
 168                                             G_BUS_NAME_WATCHER_FLAGS_NONE,
 169                                             SD_OBJECT_PATH,
 170                                             SD_INTERFACE,
 171                                             G_TYPE_DBUS_PROXY,
 172                                             G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES,
 173                                             mediakeys_service_appeared_cb,
 174                                             mediakeys_service_disappeared_cb,
 175                                             keys, NULL);
 176 }
 177
 178 void
 179 ev_media_player_keys_focused (EvMediaPlayerKeys *keys)
 180 {
 181         if (keys->proxy == NULL)
 182                 return;
 183
 184         ev_media_player_keys_grab_keys (keys);
 185 }
 186
 187 static void
 188 ev_media_player_keys_finalize (GObject *object)
 189 {
 190         EvMediaPlayerKeys *keys = EV_MEDIA_PLAYER_KEYS (object);
 191
 192         ev_media_player_keys_release_keys (keys);
 193
 194         if (keys->watch_id > 0)
 195                 g_bus_unwatch_name (keys->watch_id);
 196
 197         if (keys->proxy != NULL)
 198                 g_object_unref (keys->proxy);
 199
 200         G_OBJECT_CLASS (ev_media_player_keys_parent_class)->finalize (object);
 201 }
 202
 203 EvMediaPlayerKeys *
 204 ev_media_player_keys_new (void)
 205 {
 206         return g_object_new (EV_TYPE_MEDIA_PLAYER_KEYS, NULL);
 207 }
 208