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 #include "../dbus_constants.h"
  31
  32 static const char * g_signals[] =
  33 {
  34   "StudioAppeared",
  35   "StudioDisappeared",
  36   NULL
  37 };
  38
  39 static DBusHandlerResult message_hook(DBusConnection * connection, DBusMessage * message, void * data)
  40 {
  41   const char * object_path;
  42
  43   object_path = dbus_message_get_path(message);
  44   if (object_path == NULL || strcmp(object_path, CONTROL_OBJECT_PATH) != 0)
  45   {
  46     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
  47   }
  48
  49   if (dbus_message_is_signal(message, IFACE_CONTROL, "StudioAppeared"))
  50   {
  51     log_info("StudioAppeared");
  52     control_proxy_on_studio_appeared();
  53     return DBUS_HANDLER_RESULT_HANDLED;
  54   }
  55
  56   if (dbus_message_is_signal(message, IFACE_CONTROL, "StudioDisappeared"))
  57   {
  58     log_info("StudioDisappeared");
  59     control_proxy_on_studio_disappeared();
  60     return DBUS_HANDLER_RESULT_HANDLED;
  61   }
  62
  63   return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
  64 }
  65
  66 static bool control_proxy_is_studio_loaded(bool * present_ptr)
  67 {
  68   dbus_bool_t present;
  69
  70   if (!dbus_call(SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, "IsStudioLoaded", "", "b", &present))
  71   {
  72     return false;
  73   }
  74
  75   *present_ptr = present;
  76
  77   return true;
  78 }
  79
  80 bool control_proxy_init(void)
  81 {
  82   bool studio_present;
  83
  84   if (!control_proxy_is_studio_loaded(&studio_present))
  85   {
  86     return false;
  87   }
  88
  89   if (studio_present)
  90   {
  91     log_info("Initial studio appear");
  92     control_proxy_on_studio_appeared();
  93   }
  94
  95   if (!dbus_register_object_signal_handler(g_dbus_connection, SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, g_signals, message_hook, NULL))
  96   {
  97     if (studio_present)
  98     {
  99       control_proxy_on_studio_disappeared();
 100     }
 101
 102     return false;
 103   }
 104
 105   return true;
 106 }
 107
 108 void control_proxy_uninit(void)
 109 {
 110   dbus_unregister_object_signal_handler(g_dbus_connection, SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, g_signals, message_hook, NULL);
 111 }
 112
 113 bool control_proxy_get_studio_list(void (* callback)(void * context, const char * studio_name), void * context)
 114 {
 115   DBusMessage * reply_ptr;
 116   const char * reply_signature;
 117   DBusMessageIter top_iter;
 118   DBusMessageIter struct_iter;
 119   DBusMessageIter array_iter;
 120   const char * studio_name;
 121
 122   if (!dbus_call(SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, "GetStudioList", "", NULL, &reply_ptr))
 123   {
 124     log_error("GetStudioList() failed.");
 125     return false;
 126   }
 127
 128   reply_signature = dbus_message_get_signature(reply_ptr);
 129   if (strcmp(reply_signature, "a(sa{sv})") != 0)
 130   {
 131     log_error("GetStudioList() reply signature mismatch. '%s'", reply_signature);
 132     dbus_message_unref(reply_ptr);
 133     return false;
 134   }
 135
 136   dbus_message_iter_init(reply_ptr, &top_iter);
 137   for (dbus_message_iter_recurse(&top_iter, &array_iter);
 138        dbus_message_iter_get_arg_type(&array_iter) != DBUS_TYPE_INVALID;
 139        dbus_message_iter_next(&array_iter))
 140   {
 141     dbus_message_iter_recurse(&array_iter, &struct_iter);
 142     dbus_message_iter_get_basic(&struct_iter, &studio_name);
 143     callback(context, studio_name);
 144     dbus_message_iter_next(&struct_iter);
 145     dbus_message_iter_next(&struct_iter);
 146   }
 147
 148   dbus_message_unref(reply_ptr);
 149   return true;
 150 }
 151
 152 bool control_proxy_new_studio(const char * studio_name)
 153 {
 154   if (studio_name == NULL)
 155   {
 156     studio_name = "";
 157   }
 158
 159   if (!dbus_call(SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, "NewStudio", "s", &studio_name, ""))
 160   {
 161     log_error("NewStudio() failed.");
 162     return false;
 163   }
 164
 165   return true;
 166 }
 167
 168 bool control_proxy_load_studio(const char * studio_name)
 169 {
 170   if (!dbus_call(SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, "LoadStudio", "s", &studio_name, ""))
 171   {
 172     log_error("LoadStudio() failed.");
 173     return false;
 174   }
 175
 176   return true;
 177 }
 178
 179 bool control_proxy_delete_studio(const char * studio_name)
 180 {
 181   if (!dbus_call(SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, "DeleteStudio", "s", &studio_name, ""))
 182   {
 183     log_error("DeleteStudio() failed.");
 184     return false;
 185   }
 186
 187   return true;
 188 }
 189
 190 bool control_proxy_exit(void)
 191 {
 192   if (!dbus_call(SERVICE_NAME, CONTROL_OBJECT_PATH, IFACE_CONTROL, "Exit", "", ""))
 193   {
 194     log_error("Exit() failed.");
 195     return false;
 196   }
 197
 198   return true;
 199 }