studio_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 the helper functionality
   9  * for accessing Studio 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 "common.h"
  29 #include "dbus_constants.h"
  30 #include "dbus/helpers.h"
  31
  32 static void (* g_renamed_callback)(const char * new_studio_name) = NULL;
  33
  34 static const char * g_signals[] =
  35 {
  36   "StudioRenamed",
  37   "RoomAppeared",
  38   "RoomDisappeared",
  39   NULL
  40 };
  41
  42 static DBusHandlerResult message_hook(DBusConnection * connection, DBusMessage * message, void * data)
  43 {
  44   const char * object_path;
  45   char * name;
  46
  47   object_path = dbus_message_get_path(message);
  48   if (object_path == NULL || strcmp(object_path, STUDIO_OBJECT_PATH) != 0)
  49   {
  50     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
  51   }
  52
  53   if (dbus_message_is_signal(message, IFACE_STUDIO, "StudioRenamed"))
  54   {
  55     if (!dbus_message_get_args(message, &g_dbus_error, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID))
  56     {
  57       lash_error("Invalid parameters of StudioRenamed signal: %s",  g_dbus_error.message);
  58       dbus_error_free(&g_dbus_error);
  59     }
  60     else
  61     {
  62       lash_info("StudioRenamed");
  63
  64       if (g_renamed_callback != NULL)
  65       {
  66         g_renamed_callback(name);
  67       }
  68     }
  69
  70     return DBUS_HANDLER_RESULT_HANDLED;
  71   }
  72
  73   if (dbus_message_is_signal(message, IFACE_STUDIO, "RoomAppeared"))
  74   {
  75     lash_info("RoomAppeared");
  76     return DBUS_HANDLER_RESULT_HANDLED;
  77   }
  78
  79   if (dbus_message_is_signal(message, IFACE_STUDIO, "RoomDisappeared"))
  80   {
  81     lash_info("RoomDisappeared");
  82     return DBUS_HANDLER_RESULT_HANDLED;
  83   }
  84
  85   return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
  86 }
  87
  88 bool studio_proxy_init(void)
  89 {
  90   if (!dbus_register_object_signal_handler(
  91         g_dbus_connection,
  92         SERVICE_NAME,
  93         STUDIO_OBJECT_PATH,
  94         IFACE_STUDIO,
  95         g_signals,
  96         message_hook,
  97         NULL))
  98   {
  99     lash_error("studio_object_path() failed");
 100     return false;
 101   }
 102
 103   return true;
 104 }
 105
 106 void studio_proxy_uninit(void)
 107 {
 108   if (!dbus_unregister_object_signal_handler(
 109         g_dbus_connection,
 110         SERVICE_NAME,
 111         STUDIO_OBJECT_PATH,
 112         IFACE_STUDIO,
 113         g_signals,
 114         message_hook,
 115         NULL))
 116   {
 117     lash_error("studio_object_path() failed");
 118   }
 119 }
 120
 121 bool studio_proxy_get_name(char ** name_ptr)
 122 {
 123   const char * name;
 124   if (!dbus_call_simple(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "GetName", "", "s", &name))
 125   {
 126     return false;
 127   }
 128
 129   *name_ptr = strdup(name);
 130   if (*name_ptr == NULL)
 131   {
 132     lash_error("strdup() failed to duplicate studio name");
 133     return false;
 134   }
 135
 136   return true;
 137 }
 138
 139 bool studio_proxy_rename(const char * name)
 140 {
 141   return dbus_call_simple(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "Rename", "s", &name, "");
 142 }
 143
 144 bool studio_proxy_save(void)
 145 {
 146   return dbus_call_simple(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "Save", "", "");
 147 }
 148
 149 bool studio_proxy_unload(void)
 150 {
 151   return dbus_call_simple(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "Unload", "", "");
 152 }
 153
 154 void studio_proxy_set_renamed_callback(void (* callback)(const char * new_studio_name))
 155 {
 156   g_renamed_callback = callback;
 157 }