gui/control_proxy.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*
   3  * LADI Session Handler (ladish)
   4  *
   5  * Copyright (C) 2009 Nedko Arnaudov <nedko@arnaudov.name>
   6  *
   7  **************************************************************************
   8  * This file contains implementation of code that interfaces
   9  * the ladishd Control object through D-Bus
  10  **************************************************************************
  11  *
  12  * LADI Session Handler is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * LADI Session Handler is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
  24  * or write to the Free Software Foundation, Inc.,
  25  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  26  */
  27
  28 #include "control_proxy.h"
  29 #include "../dbus/helpers.h"
  30
  31 #define SERVICE   DBUS_NAME_BASE
  32 #define OBJECT    DBUS_BASE_PATH "/Control"
  33 #define IFACE     DBUS_NAME_BASE ".Control"
  34
  35 const char * g_signals[] =
  36 {
  37   "StudioAppeared",
  38   "StudioDisappeared",
  39   NULL
  40 };
  41
  42 static DBusHandlerResult message_hook(DBusConnection * connection, DBusMessage * message, void * data)
  43 {
  44   const char * object_path;
  45
  46   object_path = dbus_message_get_path(message);
  47   if (object_path == NULL || strcmp(object_path, OBJECT) != 0)
  48   {
  49     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
  50   }
  51
  52   if (dbus_message_is_signal(message, IFACE, "StudioAppeared"))
  53   {
  54     lash_info("StudioAppeared");
  55     control_proxy_on_studio_appeared();
  56     return DBUS_HANDLER_RESULT_HANDLED;
  57   }
  58
  59   if (dbus_message_is_signal(message, IFACE, "StudioDisappeared"))
  60   {
  61     lash_info("StudioDisappeared");
  62     control_proxy_on_studio_disappeared();
  63     return DBUS_HANDLER_RESULT_HANDLED;
  64   }
  65
  66   return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
  67 }
  68
  69 static bool control_proxy_is_studio_loaded(bool * present_ptr)
  70 {
  71   dbus_bool_t present;
  72
  73   if (!dbus_call_simple(SERVICE, OBJECT, IFACE, "IsStudioLoaded", "", "b", &present))
  74   {
  75     return false;
  76   }
  77
  78   *present_ptr = present;
  79
  80   return true;
  81 }
  82
  83 bool control_proxy_init(void)
  84 {
  85   bool studio_present;
  86
  87   if (!dbus_register_object_signal_handler(g_dbus_connection, SERVICE, OBJECT, IFACE, g_signals, message_hook, NULL))
  88   {
  89     return false;
  90   }
  91
  92   if (!control_proxy_is_studio_loaded(&studio_present))
  93   {
  94     dbus_unregister_object_signal_handler(g_dbus_connection, SERVICE, OBJECT, IFACE, g_signals, message_hook, NULL);
  95     return false;
  96   }
  97
  98   if (studio_present)
  99   {
 100     control_proxy_on_studio_appeared();
 101   }
 102
 103   return true;
 104 }
 105
 106 void control_proxy_uninit(void)
 107 {
 108   dbus_unregister_object_signal_handler(g_dbus_connection, SERVICE, OBJECT, IFACE, g_signals, message_hook, NULL);
 109 }
 110
 111 bool control_proxy_get_studio_list(struct list_head * studio_list)
 112 {
 113   return false;
 114 }
 115
 116 bool control_proxy_load_studio(const char * studio_name)
 117 {
 118   return false;
 119 }
 120
 121 bool control_proxy_exit(void)
 122 {
 123   return false;
 124 }