src/ibusfactory.c

   1 /* -*- mode: C; c-basic-offset: 4; indent-tabs-mode: nil; -*- */
   2 /* vim:set et sts=4: */
   3 /* ibus - The Input Bus
   4  * Copyright (C) 2008-2010 Peng Huang <shawn.p.huang@gmail.com>
   5  * Copyright (C) 2008-2010 Red Hat, Inc.
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library 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 GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the
  19  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22 #include "ibusfactory.h"
  23 #include "ibusengine.h"
  24 #include "ibusmarshalers.h"
  25 #include "ibusshare.h"
  26 #include "ibusinternal.h"
  27
  28 #define IBUS_FACTORY_GET_PRIVATE(o)  \
  29    (G_TYPE_INSTANCE_GET_PRIVATE ((o), IBUS_TYPE_FACTORY, IBusFactoryPrivate))
  30
  31 enum {
  32     CREATE_ENGINE,
  33     LAST_SIGNAL,
  34 };
  35
  36 enum {
  37     PROP_0,
  38 };
  39
  40 /* IBusFactoryPriv */
  41 struct _IBusFactoryPrivate {
  42     guint id;
  43     GList          *engine_list;
  44     GHashTable     *engine_table;
  45 };
  46
  47 static guint            factory_signals[LAST_SIGNAL] = { 0 };
  48
  49 /* functions prototype */
  50 static void      ibus_factory_destroy        (IBusFactory        *factory);
  51 static void      ibus_factory_set_property   (IBusFactory        *engine,
  52                                               guint               prop_id,
  53                                               const GValue       *value,
  54                                               GParamSpec         *pspec);
  55 static void      ibus_factory_get_property   (IBusFactory        *factory,
  56                                               guint               prop_id,
  57                                               GValue             *value,
  58                                               GParamSpec         *pspec);
  59 static void      ibus_factory_service_method_call
  60                                               (IBusService        *service,
  61                                                GDBusConnection    *connection,
  62                                                const gchar        *sender,
  63                                                const gchar        *object_path,
  64                                                const gchar        *interface_name,
  65                                                const gchar        *method_name,
  66                                                GVariant           *parameters,
  67                                                GDBusMethodInvocation
  68                                                                   *invocation);
  69 static GVariant *ibus_factory_service_get_property
  70                                              (IBusService        *service,
  71                                               GDBusConnection    *connection,
  72                                               const gchar        *sender,
  73                                               const gchar        *object_path,
  74                                               const gchar        *interface_name,
  75                                               const gchar        *property_name,
  76                                               GError            **error);
  77 static gboolean  ibus_factory_service_set_property
  78                                              (IBusService        *service,
  79                                               GDBusConnection    *connection,
  80                                               const gchar        *sender,
  81                                               const gchar        *object_path,
  82                                               const gchar        *interface_name,
  83                                               const gchar        *property_name,
  84                                               GVariant           *value,
  85                                               GError            **error);
  86 static void      ibus_factory_engine_destroy_cb
  87                                              (IBusEngine         *engine,
  88                                               IBusFactory        *factory);
  89
  90 G_DEFINE_TYPE (IBusFactory, ibus_factory, IBUS_TYPE_SERVICE)
  91
  92 static const gchar introspection_xml[] =
  93     "<node>"
  94     "  <interface name='org.freedesktop.IBus.Factory'>"
  95     "    <method name='CreateEngine'>"
  96     "      <arg direction='in'  type='s' name='name' />"
  97     "      <arg direction='out' type='o' />"
  98     "    </method>"
  99     "  </interface>"
 100     "</node>";
 101
 102 static IBusEngine *
 103 ibus_factory_real_create_engine (IBusFactory    *factory,
 104                                  const gchar    *engine_name)
 105 {
 106     GType engine_type;
 107     gchar *object_path = NULL;
 108     IBusEngine *engine = NULL;
 109
 110     engine_type = (GType) g_hash_table_lookup (factory->priv->engine_table,
 111                                                engine_name);
 112
 113     g_return_val_if_fail (engine_type != G_TYPE_INVALID, NULL);
 114
 115     object_path = g_strdup_printf ("/org/freedesktop/IBus/Engine/%d",
 116                                    ++factory->priv->id);
 117     engine = ibus_engine_new_with_type (engine_type,
 118                                         engine_name,
 119                                         object_path,
 120                                         ibus_service_get_connection ((IBusService *)factory));
 121     g_free (object_path);
 122
 123     return engine;
 124 }
 125
 126 static gboolean
 127 _ibus_factory_create_engine_accumulator (GSignalInvocationHint *ihint,
 128                                          GValue                *return_accu,
 129                                          const GValue          *handler_return,
 130                                          gpointer               dummy)
 131 {
 132     gboolean retval = TRUE;
 133     GObject *object = g_value_get_object (handler_return);
 134
 135     if (object != NULL) {
 136         g_value_copy (handler_return, return_accu);
 137         retval = FALSE;
 138     }
 139
 140     return retval;
 141 }
 142
 143 static void
 144 ibus_factory_class_init (IBusFactoryClass *class)
 145 {
 146     GObjectClass *gobject_class = G_OBJECT_CLASS (class);
 147     IBusObjectClass *ibus_object_class = IBUS_OBJECT_CLASS (class);
 148
 149     gobject_class->set_property = (GObjectSetPropertyFunc) ibus_factory_set_property;
 150     gobject_class->get_property = (GObjectGetPropertyFunc) ibus_factory_get_property;
 151
 152     ibus_object_class->destroy = (IBusObjectDestroyFunc) ibus_factory_destroy;
 153
 154     IBUS_SERVICE_CLASS (class)->service_method_call  = ibus_factory_service_method_call;
 155     IBUS_SERVICE_CLASS (class)->service_get_property = ibus_factory_service_get_property;
 156     IBUS_SERVICE_CLASS (class)->service_set_property = ibus_factory_service_set_property;
 157     class->create_engine = ibus_factory_real_create_engine;
 158
 159     ibus_service_class_add_interfaces (IBUS_SERVICE_CLASS (class), introspection_xml);
 160
 161     g_type_class_add_private (class, sizeof (IBusFactoryPrivate));
 162
 163     /**
 164      * IBusFactory::create-engine:
 165      * @factory: the factory which received the signal
 166      * @engine_name: the engine_name which received the signal
 167      * @returns: (transfer full): An IBusEngine
 168      *
 169      * The ::create-engine signal is a signal to create IBusEngine
 170      * with @engine_name, which gets emitted when IBusFactory
 171      * received CreateEngine dbus method. The callback functions
 172      * will be called until a callback returns a non-null object
 173      * of IBusEngine. */
 174     factory_signals[CREATE_ENGINE] =
 175         g_signal_new (I_("create-engine"),
 176             G_TYPE_FROM_CLASS (gobject_class),
 177             G_SIGNAL_RUN_LAST,
 178             G_STRUCT_OFFSET (IBusFactoryClass, create_engine),
 179             _ibus_factory_create_engine_accumulator,
 180             NULL,
 181             _ibus_marshal_OBJECT__STRING,
 182             IBUS_TYPE_ENGINE,
 183             1,
 184             G_TYPE_STRING);
 185 }
 186
 187 static void
 188 ibus_factory_init (IBusFactory *factory)
 189 {
 190     factory->priv = IBUS_FACTORY_GET_PRIVATE (factory);
 191     factory->priv->engine_table =
 192         g_hash_table_new_full (g_str_hash,
 193                                g_str_equal,
 194                                g_free,
 195                                NULL);
 196 }
 197
 198 static void
 199 ibus_factory_destroy (IBusFactory *factory)
 200 {
 201     GList *list;
 202
 203     list = g_list_copy (factory->priv->engine_list);
 204     g_list_free_full (list, (GDestroyNotify)ibus_object_destroy);
 205     g_list_free(factory->priv->engine_list);
 206     factory->priv->engine_list = NULL;
 207
 208     if (factory->priv->engine_table) {
 209         g_hash_table_destroy (factory->priv->engine_table);
 210     }
 211
 212     IBUS_OBJECT_CLASS(ibus_factory_parent_class)->destroy (IBUS_OBJECT (factory));
 213 }
 214
 215 static void
 216 ibus_factory_set_property (IBusFactory  *factory,
 217                            guint         prop_id,
 218                            const GValue *value,
 219                            GParamSpec   *pspec)
 220 {
 221     switch (prop_id) {
 222     default:
 223         G_OBJECT_WARN_INVALID_PROPERTY_ID (factory, prop_id, pspec);
 224     }
 225 }
 226
 227 static void
 228 ibus_factory_get_property (IBusFactory *factory,
 229                            guint        prop_id,
 230                            GValue      *value,
 231                            GParamSpec  *pspec)
 232 {
 233     switch (prop_id) {
 234     default:
 235         G_OBJECT_WARN_INVALID_PROPERTY_ID (factory, prop_id, pspec);
 236     }
 237 }
 238
 239 static void
 240 ibus_factory_engine_destroy_cb (IBusEngine  *engine,
 241                                 IBusFactory *factory)
 242 {
 243     factory->priv->engine_list = g_list_remove (factory->priv->engine_list, engine);
 244     g_object_unref (engine);
 245 }
 246
 247 static void
 248 ibus_factory_service_method_call (IBusService           *service,
 249                                   GDBusConnection       *connection,
 250                                   const gchar           *sender,
 251                                   const gchar           *object_path,
 252                                   const gchar           *interface_name,
 253                                   const gchar           *method_name,
 254                                   GVariant              *parameters,
 255                                   GDBusMethodInvocation *invocation)
 256 {
 257     IBusFactory *factory = IBUS_FACTORY (service);
 258
 259     if (g_strcmp0 (method_name, "CreateEngine") == 0) {
 260         gchar *engine_name = NULL;
 261         IBusEngine *engine = NULL;
 262
 263         g_variant_get (parameters, "(&s)", &engine_name);
 264         g_signal_emit (factory, factory_signals[CREATE_ENGINE],
 265                        0, engine_name, &engine);
 266
 267         if (engine != NULL) {
 268             gchar *object_path = NULL;
 269             GValue value = { 0, };
 270
 271             g_value_init (&value, G_TYPE_STRING);
 272             g_object_get_property (G_OBJECT (engine), "object-path", &value);
 273             object_path = g_value_dup_string (&value);
 274             g_value_unset (&value);
 275
 276             g_assert (engine != NULL);
 277             g_assert (object_path != NULL);
 278             g_object_ref_sink (engine);
 279             factory->priv->engine_list = g_list_append (factory->priv->engine_list, engine);
 280             g_signal_connect (engine,
 281                               "destroy",
 282                               G_CALLBACK (ibus_factory_engine_destroy_cb),
 283                               factory);
 284             g_dbus_method_invocation_return_value (invocation,
 285                                                    g_variant_new ("(o)", object_path));
 286             g_free (object_path);
 287         }
 288         else {
 289             gchar *error_message = g_strdup_printf ("Can not fond engine %s", engine_name);
 290             g_dbus_method_invocation_return_error (invocation,
 291                                                    G_DBUS_ERROR,
 292                                                    G_DBUS_ERROR_FAILED,
 293                                                    error_message);
 294             g_free (error_message);
 295         }
 296         return;
 297     }
 298
 299     IBUS_SERVICE_CLASS (ibus_factory_parent_class)->
 300             service_method_call (service,
 301                                  connection,
 302                                  sender,
 303                                  object_path,
 304                                  interface_name,
 305                                  method_name,
 306                                  parameters,
 307                                  invocation);
 308 }
 309
 310 static GVariant *
 311 ibus_factory_service_get_property (IBusService        *service,
 312                                    GDBusConnection    *connection,
 313                                    const gchar        *sender,
 314                                    const gchar        *object_path,
 315                                    const gchar        *interface_name,
 316                                    const gchar        *property_name,
 317                                    GError            **error)
 318 {
 319     return IBUS_SERVICE_CLASS (ibus_factory_parent_class)->
 320                 service_get_property (service,
 321                                       connection,
 322                                       sender,
 323                                       object_path,
 324                                       interface_name,
 325                                       property_name,
 326                                       error);
 327 }
 328
 329 static gboolean
 330 ibus_factory_service_set_property (IBusService        *service,
 331                                    GDBusConnection    *connection,
 332                                    const gchar        *sender,
 333                                    const gchar        *object_path,
 334                                    const gchar        *interface_name,
 335                                    const gchar        *property_name,
 336                                    GVariant           *value,
 337                                    GError            **error)
 338 {
 339     return IBUS_SERVICE_CLASS (ibus_factory_parent_class)->
 340                 service_set_property (service,
 341                                       connection,
 342                                       sender,
 343                                       object_path,
 344                                       interface_name,
 345                                       property_name,
 346                                       value,
 347                                       error);
 348 }
 349
 350 IBusFactory *
 351 ibus_factory_new (GDBusConnection *connection)
 352 {
 353     g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
 354
 355     IBusEngine *object = g_object_new (IBUS_TYPE_FACTORY,
 356                                        "object-path", IBUS_PATH_FACTORY,
 357                                        "connection", connection,
 358                                        NULL);
 359
 360     return IBUS_FACTORY (object);
 361 }
 362
 363 void
 364 ibus_factory_add_engine (IBusFactory *factory,
 365                          const gchar *engine_name,
 366                          GType        engine_type)
 367 {
 368     g_return_if_fail (IBUS_IS_FACTORY (factory));
 369     g_return_if_fail (engine_name != NULL);
 370     g_return_if_fail (g_type_is_a (engine_type, IBUS_TYPE_ENGINE));
 371
 372     g_hash_table_insert (factory->priv->engine_table, g_strdup (engine_name), (gpointer) engine_type);
 373 }
 374
 375 IBusEngine *
 376 ibus_factory_create_engine (IBusFactory    *factory,
 377                             const gchar    *engine_name)
 378 {
 379     IBusEngine *engine = NULL;
 380
 381     g_assert (engine_name != NULL);
 382
 383     g_signal_emit (factory, factory_signals[CREATE_ENGINE],
 384                    0, engine_name, &engine);
 385
 386     return engine;
 387 }