daemon/control.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*
   3  * LADI Session Handler (ladish)
   4  *
   5  * Copyright (C) 2008, 2009 Nedko Arnaudov <nedko@arnaudov.name>
   6  * Copyright (C) 2008 Juuso Alasuutari <juuso.alasuutari@gmail.com>
   7  *
   8  **************************************************************************
   9  * This file contains code of the D-Bus control interface helpers
  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
  30 #include "../dbus/interface.h"
  31 #include "../dbus/error.h"
  32 #include "control.h"
  33 #include "../dbus_constants.h"
  34
  35 #define INTERFACE_NAME IFACE_CONTROL
  36
  37 static void ladish_is_studio_loaded(method_call_t * call_ptr)
  38 {
  39   DBusMessageIter iter;
  40   dbus_bool_t is_loaded;
  41
  42   is_loaded = studio_is_loaded();
  43
  44   call_ptr->reply = dbus_message_new_method_return(call_ptr->message);
  45   if (call_ptr->reply == NULL)
  46   {
  47     goto fail;
  48   }
  49
  50   dbus_message_iter_init_append(call_ptr->reply, &iter);
  51
  52   if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &is_loaded))
  53   {
  54     goto fail_unref;
  55   }
  56
  57   return;
  58
  59 fail_unref:
  60   dbus_message_unref(call_ptr->reply);
  61   call_ptr->reply = NULL;
  62
  63 fail:
  64   lash_error("Ran out of memory trying to construct method return");
  65 }
  66
  67 #define array_iter_ptr ((DBusMessageIter *)context)
  68
  69 static bool get_studio_list_callback(void * call_ptr, void * context, const char * studio, uint32_t modtime)
  70 {
  71   DBusMessageIter struct_iter;
  72   DBusMessageIter dict_iter;
  73   bool ret;
  74
  75   ret = false;
  76
  77   if (!dbus_message_iter_open_container(array_iter_ptr, DBUS_TYPE_STRUCT, NULL, &struct_iter))
  78     goto exit;
  79
  80   if (!dbus_message_iter_append_basic(&struct_iter, DBUS_TYPE_STRING, &studio))
  81     goto close_struct;
  82
  83   if (!dbus_message_iter_open_container(&struct_iter, DBUS_TYPE_ARRAY, "{sv}", &dict_iter))
  84     goto close_struct;
  85
  86 /*   if (!maybe_add_dict_entry_string(&dict_iter, "Description", xxx)) */
  87 /*     goto close_dict; */
  88
  89   if (!dbus_add_dict_entry_uint32(&dict_iter, "Modification Time", modtime))
  90     goto close_dict;
  91
  92   ret = true;
  93
  94 close_dict:
  95   if (!dbus_message_iter_close_container(&struct_iter, &dict_iter))
  96     ret = false;
  97
  98 close_struct:
  99   if (!dbus_message_iter_close_container(array_iter_ptr, &struct_iter))
 100     ret = false;
 101
 102 exit:
 103   return ret;
 104 }
 105
 106 static void ladish_get_studio_list(method_call_t * call_ptr)
 107 {
 108   DBusMessageIter iter, array_iter;
 109
 110   call_ptr->reply = dbus_message_new_method_return(call_ptr->message);
 111   if (call_ptr->reply == NULL)
 112   {
 113     goto fail;
 114   }
 115
 116   dbus_message_iter_init_append(call_ptr->reply, &iter);
 117
 118   if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(sa{sv})", &array_iter))
 119   {
 120     goto fail_unref;
 121   }
 122
 123   if (!studios_iterate(call_ptr, &array_iter, get_studio_list_callback))
 124   {
 125     dbus_message_iter_close_container(&iter, &array_iter);
 126     if (call_ptr->reply == NULL)
 127       goto fail_unref;
 128
 129     /* studios_iterate or get_studio_list_callback() composed error reply */
 130     return;
 131   }
 132
 133   if (!dbus_message_iter_close_container(&iter, &array_iter))
 134   {
 135     goto fail_unref;
 136   }
 137
 138   return;
 139
 140 fail_unref:
 141   dbus_message_unref(call_ptr->reply);
 142   call_ptr->reply = NULL;
 143
 144 fail:
 145   lash_error("Ran out of memory trying to construct method return");
 146 }
 147
 148 static void ladish_load_studio(method_call_t * call_ptr)
 149 {
 150   const char * name;
 151
 152   dbus_error_init(&g_dbus_error);
 153
 154   if (!dbus_message_get_args(call_ptr->message, &g_dbus_error, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID))
 155   {
 156     lash_dbus_error(call_ptr, LASH_DBUS_ERROR_INVALID_ARGS, "Invalid arguments to method \"%s\": %s",  call_ptr->method_name, g_dbus_error.message);
 157     dbus_error_free(&g_dbus_error);
 158     return;
 159   }
 160
 161   lash_info("Loading studio '%s'", name);
 162 }
 163
 164 static void ladish_get_application_list(method_call_t * call_ptr)
 165 {
 166   DBusMessageIter iter;
 167   DBusMessageIter array_iter;
 168 #if 0
 169   DBusMessageIter struct_iter;
 170   DBusMessageIter dict_iter;
 171   struct list_head * node_ptr;
 172   struct lash_appdb_entry * entry_ptr;
 173 #endif
 174
 175   lash_info("Getting applications list");
 176
 177   call_ptr->reply = dbus_message_new_method_return(call_ptr->message);
 178   if (call_ptr->reply == NULL)
 179   {
 180     goto fail;
 181   }
 182
 183   dbus_message_iter_init_append(call_ptr->reply, &iter);
 184
 185   if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(sa{sv})", &array_iter))
 186   {
 187     goto fail_unref;
 188   }
 189
 190 #if 0
 191   list_for_each(node_ptr, &g_server->appdb)
 192   {
 193     entry_ptr = list_entry(node_ptr, struct lash_appdb_entry, siblings);
 194
 195     if (!dbus_message_iter_open_container(&array_iter, DBUS_TYPE_STRUCT, NULL, &struct_iter))
 196       goto fail_unref;
 197
 198     if (!dbus_message_iter_append_basic(&struct_iter, DBUS_TYPE_STRING, (const void *) &entry_ptr->name))
 199     {
 200       dbus_message_iter_close_container(&iter, &array_iter);
 201       goto fail_unref;
 202     }
 203
 204     if (!dbus_message_iter_open_container(&struct_iter, DBUS_TYPE_ARRAY, "{sv}", &dict_iter))
 205       goto fail_unref;
 206
 207     if (!maybe_add_dict_entry_string(&dict_iter, "GenericName", entry_ptr->generic_name))
 208       goto fail_unref;
 209
 210     if (!maybe_add_dict_entry_string(&dict_iter, "Comment", entry_ptr->comment))
 211       goto fail_unref;
 212
 213     if (!maybe_add_dict_entry_string(&dict_iter, "Icon", entry_ptr->icon))
 214       goto fail_unref;
 215
 216     if (!dbus_message_iter_close_container(&struct_iter, &dict_iter))
 217       goto fail_unref;
 218
 219     if (!dbus_message_iter_close_container(&array_iter, &struct_iter))
 220       goto fail_unref;
 221   }
 222 #endif
 223
 224   if (!dbus_message_iter_close_container(&iter, &array_iter))
 225   {
 226     goto fail_unref;
 227   }
 228
 229   return;
 230
 231 fail_unref:
 232   dbus_message_unref(call_ptr->reply);
 233   call_ptr->reply = NULL;
 234 fail:
 235   return;
 236 }
 237
 238 static void ladish_exit(method_call_t * call_ptr)
 239 {
 240   lash_info("Exit command received through D-Bus");
 241   g_quit = true;
 242 }
 243
 244 void emit_studio_appeared()
 245 {
 246   signal_new_valist(g_dbus_connection, CONTROL_OBJECT_PATH, INTERFACE_NAME, "StudioAppeared", DBUS_TYPE_INVALID);
 247 }
 248
 249 void emit_studio_disappeared()
 250 {
 251   signal_new_valist(g_dbus_connection, CONTROL_OBJECT_PATH, INTERFACE_NAME, "StudioDisappeared", DBUS_TYPE_INVALID);
 252 }
 253
 254 METHOD_ARGS_BEGIN(IsStudioLoaded, "Check whether studio D-Bus object is present")
 255   METHOD_ARG_DESCRIBE_OUT("present", "b", "Whether studio D-Bus object is present")
 256 METHOD_ARGS_END
 257
 258 METHOD_ARGS_BEGIN(GetStudioList, "Get list of studios")
 259   METHOD_ARG_DESCRIBE_OUT("studio_list", "a(sa{sv})", "List of studios, name and properties")
 260 METHOD_ARGS_END
 261
 262 METHOD_ARGS_BEGIN(LoadStudio, "Load studio")
 263   METHOD_ARG_DESCRIBE_IN("studio_name", "s", "Name of studio to load")
 264   METHOD_ARG_DESCRIBE_IN("options", "a{sv}", "Load options")
 265 METHOD_ARGS_END
 266
 267 METHOD_ARGS_BEGIN(GetApplicationList, "Get list of applications that can be launched")
 268   METHOD_ARG_DESCRIBE_OUT("applications", "a(sa{sv})", "List of applications, name and properties")
 269 METHOD_ARGS_END
 270
 271 METHOD_ARGS_BEGIN(Exit, "Tell ladish D-Bus service to exit")
 272 METHOD_ARGS_END
 273
 274 METHODS_BEGIN
 275   METHOD_DESCRIBE(IsStudioLoaded, ladish_is_studio_loaded)
 276   METHOD_DESCRIBE(GetStudioList, ladish_get_studio_list)
 277   METHOD_DESCRIBE(LoadStudio, ladish_load_studio)
 278   METHOD_DESCRIBE(GetApplicationList, ladish_get_application_list)
 279   METHOD_DESCRIBE(Exit, ladish_exit)
 280 METHODS_END
 281
 282 SIGNAL_ARGS_BEGIN(StudioAppeared, "Studio D-Bus object appeared")
 283 SIGNAL_ARGS_END
 284
 285 SIGNAL_ARGS_BEGIN(StudioDisappeared, "Studio D-Bus object disappeared")
 286 SIGNAL_ARGS_END
 287
 288 SIGNALS_BEGIN
 289   SIGNAL_DESCRIBE(StudioAppeared)
 290   SIGNAL_DESCRIBE(StudioDisappeared)
 291 SIGNALS_END
 292
 293 /*
 294  * Interface description.
 295  */
 296
 297 INTERFACE_BEGIN(g_lashd_interface_control, INTERFACE_NAME)
 298   INTERFACE_DEFAULT_HANDLER
 299   INTERFACE_EXPOSE_METHODS
 300   INTERFACE_EXPOSE_SIGNALS
 301 INTERFACE_END