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 };
  46
  47 struct _EvMediaPlayerKeysClass
  48 {
  49         GObjectClass parent_class;
  50
  51         /* Signals */
  52         void (* key_pressed) (EvMediaPlayerKeys *keys,
  53                               const gchar       *key);
  54 };
  55
  56 static guint signals[LAST_SIGNAL];
  57
  58 G_DEFINE_TYPE (EvMediaPlayerKeys, ev_media_player_keys, G_TYPE_OBJECT)
  59
  60 static void ev_media_player_keys_finalize (GObject *object);
  61
  62 static void
  63 ev_media_player_keys_class_init (EvMediaPlayerKeysClass *klass)
  64 {
  65         GObjectClass *object_class = G_OBJECT_CLASS (klass);
  66
  67         object_class->finalize = ev_media_player_keys_finalize;
  68
  69         signals[KEY_PRESSED] =
  70                 g_signal_new ("key_pressed",
  71                               EV_TYPE_MEDIA_PLAYER_KEYS,
  72                               G_SIGNAL_RUN_LAST,
  73                               G_STRUCT_OFFSET (EvMediaPlayerKeysClass, key_pressed),
  74                               NULL, NULL,
  75                               g_cclosure_marshal_VOID__STRING,
  76                               G_TYPE_NONE,
  77                               1, G_TYPE_STRING);
  78 }
  79
  80 static void
  81 ev_media_player_keys_grab_keys (EvMediaPlayerKeys *keys)
  82 {
  83         /*
  84          * The uint as second argument is time. We give a very low value so that
  85          * if a media player is there it gets higher priority on the keys (0 is
  86          * a special value having maximum priority).
  87          */
  88         g_dbus_proxy_call (keys->proxy,
  89                            "GrabMediaPlayerKeys",
  90                            g_variant_new ("(su)", "Evince", 1),
  91                            G_DBUS_CALL_FLAGS_NO_AUTO_START,
  92                            -1,
  93                            NULL, NULL, NULL);
  94 }
  95
  96 static void
  97 ev_media_player_keys_release_keys (EvMediaPlayerKeys *keys)
  98 {
  99         g_dbus_proxy_call (keys->proxy,
 100                            "ReleaseMediaPlayerKeys",
 101                            g_variant_new ("(s)", "Evince"),
 102                            G_DBUS_CALL_FLAGS_NO_AUTO_START,
 103                            -1,
 104                            NULL, NULL, NULL);
 105 }
 106
 107 static void
 108 media_player_key_pressed_cb (GDBusProxy *proxy,
 109                              gchar      *sender_name,
 110                              gchar      *signal_name,
 111                              GVariant   *parameters,
 112                              gpointer    user_data)
 113 {
 114         const char *application, *key;
 115
 116         if (g_strcmp0 (sender_name, SD_NAME) != 0)
 117                 return;
 118
 119         if (g_strcmp0 (signal_name, "MediaPlayerKeyPressed") != 0)
 120                 return;
 121
 122         if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(ss)")))
 123                 return;
 124
 125         g_variant_get (parameters, "(&s&s)", &application, &key);
 126
 127         if (strcmp ("Evince", application) == 0) {
 128                 g_signal_emit (user_data, signals[KEY_PRESSED], 0, key);
 129         }
 130 }
 131
 132 static void
 133 mediakeys_service_appeared_cb (GObject      *source_object,
 134                                GAsyncResult *res,
 135                                gpointer      user_data)
 136 {
 137         EvMediaPlayerKeys *keys = EV_MEDIA_PLAYER_KEYS (user_data);
 138         GDBusProxy *proxy;
 139
 140         proxy = g_dbus_proxy_new_for_bus_finish (res, NULL);
 141
 142         if (proxy == NULL) {
 143                 return;
 144         }
 145
 146         g_signal_connect (proxy, "g-signal",
 147                           G_CALLBACK (media_player_key_pressed_cb),
 148                           keys);
 149
 150         keys->proxy = proxy;
 151         ev_media_player_keys_grab_keys (keys);
 152 }
 153
 154 static void
 155 ev_media_player_keys_init (EvMediaPlayerKeys *keys)
 156 {
 157         g_dbus_proxy_new_for_bus (G_BUS_TYPE_SESSION,
 158                                   G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES,
 159                                   NULL,
 160                                   SD_NAME,
 161                                   SD_OBJECT_PATH,
 162                                   SD_INTERFACE,
 163                                   NULL,
 164                                   mediakeys_service_appeared_cb,
 165                                   keys);
 166 }
 167
 168 void
 169 ev_media_player_keys_focused (EvMediaPlayerKeys *keys)
 170 {
 171         if (keys->proxy == NULL)
 172                 return;
 173
 174         ev_media_player_keys_grab_keys (keys);
 175 }
 176
 177 static void
 178 ev_media_player_keys_finalize (GObject *object)
 179 {
 180         EvMediaPlayerKeys *keys = EV_MEDIA_PLAYER_KEYS (object);
 181
 182         if (keys->proxy != NULL) {
 183                 ev_media_player_keys_release_keys (keys);
 184                 g_object_unref (keys->proxy);
 185                 keys->proxy = NULL;
 186         }
 187
 188         G_OBJECT_CLASS (ev_media_player_keys_parent_class)->finalize (object);
 189 }
 190
 191 EvMediaPlayerKeys *
 192 ev_media_player_keys_new (void)
 193 {
 194         return g_object_new (EV_TYPE_MEDIA_PLAYER_KEYS, NULL);
 195 }
 196