gio/gapplication.c

   1 /*
   2  * Copyright © 2010 Codethink Limited
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU Lesser General Public License as published
   6  * by the Free Software Foundation; either version 2 of the licence or (at
   7  * your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General
  15  * Public License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  *
  19  * Authors: Ryan Lortie <desrt@desrt.ca>
  20  */
  21
  22 /* Prologue {{{1 */
  23 #include "config.h"
  24
  25 #include "gapplication.h"
  26
  27 #include "gapplicationcommandline.h"
  28 #include "gapplicationimpl.h"
  29 #include "gactiongroup.h"
  30
  31 #include "gioenumtypes.h"
  32 #include "gio-marshal.h"
  33 #include "gioenums.h"
  34 #include "gfile.h"
  35
  36 #include "glibintl.h"
  37
  38 #include <string.h>
  39
  40 /**
  41  * SECTION:gapplication
  42  * @title: GApplication
  43  * @short_description: Core application class
  44  *
  45  * A #GApplication is the foundation of an application, unique for a
  46  * given application identifier.  The GApplication class wraps some
  47  * low-level platform-specific services and is intended to act as the
  48  * foundation for higher-level application classes such as
  49  * #GtkApplication or #MxApplication.  In general, you should not use
  50  * this class outside of a higher level framework.
  51  *
  52  * One of the core features that GApplication provides is process
  53  * uniqueness, in the context of a "session".  The session concept is
  54  * platform-dependent, but corresponds roughly to a graphical desktop
  55  * login.  When your application is launched again, its arguments
  56  * are passed through platform communication to the already running
  57  * program. The already running instance of the program is called the
  58  * <firstterm>primary instance</firstterm>.
  59  *
  60  * Before using GApplication, you must choose an "application identifier".
  61  * The expected form of an application identifier is very close to that of
  62  * of a <ulink url="http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names-interface">DBus bus name</ulink>.
  63  * Examples include: "com.example.MyApp", "org.example.internal-apps.Calculator".
  64  * For details on valid application identifiers, see
  65  * g_application_id_is_valid().
  66  *
  67  * The application identifier is claimed by the application as a
  68  * well-known bus name on the user's session bus.  This means that the
  69  * uniqueness of your application is scoped to the current session.  It
  70  * also means that your application may provide additional services
  71  * (through registration of other object paths) at that bus name.
  72  *
  73  * The registration of these object paths should be done with the shared
  74  * GDBus session bus.  Note that due to the internal architecture of
  75  * GDBus, method calls can be dispatched at any time (even if a main
  76  * loop is not running).  For this reason, you must ensure that any
  77  * object paths that you wish to register are registered before
  78  * #GApplication attempts to acquire the bus name of your application
  79  * (which happens in g_application_register()).  Unfortunately, this
  80  * means that you can not use g_application_get_is_remote() to decide if
  81  * you want to register object paths.
  82  *
  83  * GApplication provides convenient life cycle management by maintaining
  84  * a <firstterm>use count</firstterm> for the primary application instance.
  85  * The use count can be changed using g_application_hold() and
  86  * g_application_release(). If it drops to zero, the application exits.
  87  *
  88  * GApplication also implements the #GActionGroup interface and lets you
  89  * easily export actions by adding them with g_application_set_action_group().
  90  * When invoking an action by calling g_action_group_activate_action() on
  91  * the application, it is always invoked in the primary instance.
  92  *
  93  * There is a number of different entry points into a #GApplication:
  94  * <itemizedlist>
  95  * <listitem>via 'Activate' (i.e. just starting the application)</listitem>
  96  * <listitem>via 'Open' (i.e. opening some files)</listitem>
  97  * <listitem>by handling a command-line</listitem>
  98  * <listitem>via activating an action</listitem>
  99  * </itemizedlist>
 100  * The #GApplication::startup signal lets you handle the application
 101  * initialization for all of these in a single place.
 102  *
 103  * Regardless of which of these entry points is used to start the application,
 104  * GApplication passes some <firstterm id="platform-data">platform
 105  * data</firstterm> from the launching instance to the primary instance,
 106  * in the form of a #GVariant dictionary mapping strings to variants.
 107  * To use platform data, override the @before_emit or @after_emit virtual
 108  * functions in your #GApplication subclass. When dealing with
 109  * #GApplicationCommandline objects, the platform data is directly
 110  * available via g_application_command_line_get_cwd(),
 111  * g_application_command_line_get_environ() and
 112  * g_application_command_line_get_platform_data().
 113  *
 114  * As the name indicates, the platform data may vary depending on the
 115  * operating system, but it always includes the current directory (key
 116  * "cwd"), and optionally the environment (ie the set of environment
 117  * variables and their values) of the calling process (key "environ").
 118  * The environment is only added to the platform data if the
 119  * #G_APPLICATION_SEND_ENVIONMENT flag is set. GApplication subclasses
 120  * can add their own platform data by overriding the @add_platform_data
 121  * virtual function. For instance, #GtkApplication adds startup notification
 122  * data in this way.
 123  *
 124  * To parse commandline arguments you may handle the
 125  * #GApplication::command-line signal or override the local_command_line()
 126  * vfunc, to parse them in either the primary instance or the local instance,
 127  * respectively.
 128  *
 129  * <example id="gapplication-example-open"><title>Opening files with a GApplication</title>
 130  * <programlisting>
 131  * <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gapplication-example-open.c">
 132  *   <xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback>
 133  * </xi:include>
 134  * </programlisting>
 135  * </example>
 136  *
 137  * <example id="gapplication-example-actions"><title>A GApplication with actions</title>
 138  * <programlisting>
 139  * <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gapplication-example-actions.c">
 140  *   <xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback>
 141  * </xi:include>
 142  * </programlisting>
 143  * </example>
 144  */
 145
 146 struct _GApplicationPrivate
 147 {
 148   GApplicationFlags  flags;
 149   gchar             *id;
 150
 151   GActionGroup      *actions;
 152   GMainLoop         *mainloop;
 153
 154   guint              inactivity_timeout_id;
 155   guint              inactivity_timeout;
 156   guint              use_count;
 157
 158   guint              is_registered : 1;
 159   guint              is_remote : 1;
 160
 161   GHashTable        *remote_actions;  /* string -> RemoteActionInfo */
 162   GApplicationImpl  *impl;
 163 };
 164
 165 enum
 166 {
 167   PROP_NONE,
 168   PROP_APPLICATION_ID,
 169   PROP_FLAGS,
 170   PROP_IS_REGISTERED,
 171   PROP_IS_REMOTE,
 172   PROP_INACTIVITY_TIMEOUT,
 173   PROP_ACTION_GROUP
 174 };
 175
 176 enum
 177 {
 178   SIGNAL_STARTUP,
 179   SIGNAL_ACTIVATE,
 180   SIGNAL_OPEN,
 181   SIGNAL_ACTION,
 182   SIGNAL_COMMAND_LINE,
 183   NR_SIGNALS
 184 };
 185
 186 static guint g_application_signals[NR_SIGNALS];
 187
 188 static void g_application_action_group_iface_init (GActionGroupInterface *);
 189 G_DEFINE_TYPE_WITH_CODE (GApplication, g_application, G_TYPE_OBJECT,
 190  G_IMPLEMENT_INTERFACE (G_TYPE_ACTION_GROUP,
 191    g_application_action_group_iface_init))
 192
 193 /* vfunc defaults {{{1 */
 194 static void
 195 g_application_real_before_emit (GApplication *application,
 196                                 GVariant     *platform_data)
 197 {
 198 }
 199
 200 static void
 201 g_application_real_after_emit (GApplication *application,
 202                                GVariant     *platform_data)
 203 {
 204 }
 205
 206 static void
 207 g_application_real_startup (GApplication *application)
 208 {
 209 }
 210
 211 static void
 212 g_application_real_activate (GApplication *application)
 213 {
 214   if (!g_signal_has_handler_pending (application,
 215                                      g_application_signals[SIGNAL_ACTIVATE],
 216                                      0, TRUE) &&
 217       G_APPLICATION_GET_CLASS (application)->activate == g_application_real_activate)
 218     {
 219       static gboolean warned;
 220
 221       if (warned)
 222         return;
 223
 224       g_warning ("Your application does not implement "
 225                  "g_application_activate() and has no handlers connected "
 226                  "to the 'activate' signal.  It should do one of these.");
 227       warned = TRUE;
 228     }
 229 }
 230
 231 static void
 232 g_application_real_open (GApplication  *application,
 233                          GFile        **files,
 234                          gint           n_files,
 235                          const gchar   *hint)
 236 {
 237   if (!g_signal_has_handler_pending (application,
 238                                      g_application_signals[SIGNAL_OPEN],
 239                                      0, TRUE) &&
 240       G_APPLICATION_GET_CLASS (application)->open == g_application_real_open)
 241     {
 242       static gboolean warned;
 243
 244       if (warned)
 245         return;
 246
 247       g_warning ("Your application claims to support opening files "
 248                  "but does not implement g_application_open() and has no "
 249                  "handlers connected to the 'open' signal.");
 250       warned = TRUE;
 251     }
 252 }
 253
 254 static int
 255 g_application_real_command_line (GApplication            *application,
 256                                  GApplicationCommandLine *cmdline)
 257 {
 258   static gboolean warned;
 259
 260   if (warned)
 261     return 1;
 262
 263   g_warning ("Your application claims to support custom command line "
 264              "handling but does not implement g_application_command_line() "
 265              "and has no handlers connected to the 'command-line' signal.");
 266
 267   warned = TRUE;
 268
 269   return 1;
 270 }
 271
 272 static gboolean
 273 g_application_real_local_command_line (GApplication   *application,
 274                                        gchar        ***arguments,
 275                                        int            *exit_status)
 276 {
 277   if (application->priv->flags & G_APPLICATION_HANDLES_COMMAND_LINE)
 278     return FALSE;
 279
 280   else
 281     {
 282       GError *error = NULL;
 283       gint n_args;
 284
 285       if (!g_application_register (application, NULL, &error))
 286         {
 287           g_critical ("%s", error->message);
 288           g_error_free (error);
 289           *exit_status = 1;
 290           return TRUE;
 291         }
 292
 293       n_args = g_strv_length (*arguments);
 294
 295       if (application->priv->flags & G_APPLICATION_IS_SERVICE)
 296         {
 297           if ((*exit_status = n_args > 1))
 298             {
 299               g_printerr ("GApplication service mode takes no arguments.\n");
 300               application->priv->flags &= ~G_APPLICATION_IS_SERVICE;
 301             }
 302
 303           return TRUE;
 304         }
 305
 306       if (n_args <= 1)
 307         {
 308           g_application_activate (application);
 309           *exit_status = 0;
 310         }
 311
 312       else
 313         {
 314           if (~application->priv->flags & G_APPLICATION_HANDLES_OPEN)
 315             {
 316               g_critical ("This application can not open files.");
 317               *exit_status = 1;
 318             }
 319           else
 320             {
 321               GFile **files;
 322               gint n_files;
 323               gint i;
 324
 325               n_files = n_args - 1;
 326               files = g_new (GFile *, n_files);
 327
 328               for (i = 0; i < n_files; i++)
 329                 files[i] = g_file_new_for_commandline_arg ((*arguments)[i + 1]);
 330
 331               g_application_open (application, files, n_files, "");
 332
 333               for (i = 0; i < n_files; i++)
 334                 g_object_unref (files[i]);
 335               g_free (files);
 336
 337               *exit_status = 0;
 338             }
 339         }
 340
 341       return TRUE;
 342     }
 343 }
 344
 345 static void
 346 g_application_real_add_platform_data (GApplication    *application,
 347                                       GVariantBuilder *builder)
 348 {
 349 }
 350
 351 static void
 352 g_application_real_quit_mainloop (GApplication *application)
 353 {
 354   if (application->priv->mainloop != NULL)
 355     g_main_loop_quit (application->priv->mainloop);
 356 }
 357
 358 static void
 359 g_application_real_run_mainloop (GApplication *application)
 360 {
 361   if (application->priv->mainloop == NULL)
 362     application->priv->mainloop = g_main_loop_new (NULL, FALSE);
 363
 364   g_main_loop_run (application->priv->mainloop);
 365 }
 366
 367 /* GObject implementation stuff {{{1 */
 368 static void
 369 g_application_set_property (GObject      *object,
 370                             guint         prop_id,
 371                             const GValue *value,
 372                             GParamSpec   *pspec)
 373 {
 374   GApplication *application = G_APPLICATION (object);
 375
 376   switch (prop_id)
 377     {
 378     case PROP_APPLICATION_ID:
 379       g_application_set_application_id (application,
 380                                         g_value_get_string (value));
 381       break;
 382
 383     case PROP_FLAGS:
 384       g_application_set_flags (application, g_value_get_flags (value));
 385       break;
 386
 387     case PROP_INACTIVITY_TIMEOUT:
 388       g_application_set_inactivity_timeout (application,
 389                                             g_value_get_uint (value));
 390       break;
 391
 392     case PROP_ACTION_GROUP:
 393       g_application_set_action_group (application,
 394                                       g_value_get_object (value));
 395       break;
 396
 397     default:
 398       g_assert_not_reached ();
 399     }
 400 }
 401
 402 /**
 403  * g_application_set_action_group:
 404  * @application: a #GApplication
 405  * @action_group: (allow-none): a #GActionGroup, or %NULL
 406  *
 407  * Sets or unsets the group of actions associated with the application.
 408  *
 409  * These actions are the actions that can be remotely invoked.
 410  *
 411  * It is an error to call this function after the application has been
 412  * registered.
 413  *
 414  * Since: 2.28
 415  **/
 416 void
 417 g_application_set_action_group (GApplication *application,
 418                                 GActionGroup *action_group)
 419 {
 420   g_return_if_fail (G_IS_APPLICATION (application));
 421   g_return_if_fail (!application->priv->is_registered);
 422
 423   if (application->priv->actions != NULL)
 424     g_object_unref (application->priv->actions);
 425
 426   application->priv->actions = action_group;
 427
 428   if (application->priv->actions != NULL)
 429     g_object_ref (application->priv->actions);
 430 }
 431
 432 static void
 433 g_application_get_property (GObject    *object,
 434                             guint       prop_id,
 435                             GValue     *value,
 436                             GParamSpec *pspec)
 437 {
 438   GApplication *application = G_APPLICATION (object);
 439
 440   switch (prop_id)
 441     {
 442     case PROP_APPLICATION_ID:
 443       g_value_set_string (value,
 444                           g_application_get_application_id (application));
 445       break;
 446
 447     case PROP_FLAGS:
 448       g_value_set_flags (value,
 449                          g_application_get_flags (application));
 450       break;
 451
 452     case PROP_IS_REGISTERED:
 453       g_value_set_boolean (value,
 454                            g_application_get_is_registered (application));
 455       break;
 456
 457     case PROP_IS_REMOTE:
 458       g_value_set_boolean (value,
 459                            g_application_get_is_remote (application));
 460       break;
 461
 462     case PROP_INACTIVITY_TIMEOUT:
 463       g_value_set_uint (value,
 464                         g_application_get_inactivity_timeout (application));
 465       break;
 466
 467     default:
 468       g_assert_not_reached ();
 469     }
 470 }
 471
 472 static void
 473 g_application_constructed (GObject *object)
 474 {
 475   GApplication *application = G_APPLICATION (object);
 476
 477   g_assert (application->priv->id != NULL);
 478 }
 479
 480 static void
 481 g_application_finalize (GObject *object)
 482 {
 483   GApplication *application = G_APPLICATION (object);
 484
 485   if (application->priv->impl)
 486     g_application_impl_destroy (application->priv->impl);
 487   g_free (application->priv->id);
 488
 489   if (application->priv->mainloop)
 490     g_main_loop_unref (application->priv->mainloop);
 491
 492   G_OBJECT_CLASS (g_application_parent_class)
 493     ->finalize (object);
 494 }
 495
 496 static void
 497 g_application_init (GApplication *application)
 498 {
 499   application->priv = G_TYPE_INSTANCE_GET_PRIVATE (application,
 500                                                    G_TYPE_APPLICATION,
 501                                                    GApplicationPrivate);
 502 }
 503
 504 static void
 505 g_application_class_init (GApplicationClass *class)
 506 {
 507   GObjectClass *object_class = G_OBJECT_CLASS (class);
 508
 509   object_class->constructed = g_application_constructed;
 510   object_class->finalize = g_application_finalize;
 511   object_class->get_property = g_application_get_property;
 512   object_class->set_property = g_application_set_property;
 513
 514   class->before_emit = g_application_real_before_emit;
 515   class->after_emit = g_application_real_after_emit;
 516   class->startup = g_application_real_startup;
 517   class->activate = g_application_real_activate;
 518   class->open = g_application_real_open;
 519   class->command_line = g_application_real_command_line;
 520   class->local_command_line = g_application_real_local_command_line;
 521   class->add_platform_data = g_application_real_add_platform_data;
 522   class->quit_mainloop = g_application_real_quit_mainloop;
 523   class->run_mainloop = g_application_real_run_mainloop;
 524
 525   g_object_class_install_property (object_class, PROP_APPLICATION_ID,
 526     g_param_spec_string ("application-id",
 527                          P_("Application identifier"),
 528                          P_("The unique identifier for the application"),
 529                          NULL, G_PARAM_READWRITE | G_PARAM_CONSTRUCT |
 530                          G_PARAM_STATIC_STRINGS));
 531
 532   g_object_class_install_property (object_class, PROP_FLAGS,
 533     g_param_spec_flags ("flags",
 534                         P_("Application flags"),
 535                         P_("Flags specifying the behaviour of the application"),
 536                         G_TYPE_APPLICATION_FLAGS, G_APPLICATION_FLAGS_NONE,
 537                         G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 538
 539   g_object_class_install_property (object_class, PROP_IS_REGISTERED,
 540     g_param_spec_boolean ("is-registered",
 541                           P_("Is registered"),
 542                           P_("If g_application_register() has been called"),
 543                           FALSE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
 544
 545   g_object_class_install_property (object_class, PROP_IS_REMOTE,
 546     g_param_spec_boolean ("is-remote",
 547                           P_("Is remote"),
 548                           P_("If this application instance is remote"),
 549                           FALSE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
 550
 551   g_object_class_install_property (object_class, PROP_INACTIVITY_TIMEOUT,
 552     g_param_spec_uint ("inactivity-timeout",
 553                        P_("Inactivity timeout"),
 554                        P_("Iime (ms) to stay alive after becoming idle"),
 555                        0, G_MAXUINT, 0,
 556                        G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 557
 558   g_object_class_install_property (object_class, PROP_ACTION_GROUP,
 559     g_param_spec_object ("action-group",
 560                          P_("Action group"),
 561                          P_("The group of actions that the application exports"),
 562                          G_TYPE_ACTION_GROUP,
 563                          G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
 564
 565   /**
 566    * GApplication::startup:
 567    * @application: the application
 568    *
 569    * The ::startup signal is emitted on the primary instance immediately
 570    * after registration. See g_application_register().
 571    */
 572   g_application_signals[SIGNAL_STARTUP] =
 573     g_signal_new ("startup", G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
 574                   G_STRUCT_OFFSET (GApplicationClass, startup),
 575                   NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
 576
 577   /**
 578    * GApplication::activate:
 579    * @application: the application
 580    *
 581    * The ::activate signal is emitted on the primary instance when an
 582    * activation occurs. See g_application_activate().
 583    */
 584   g_application_signals[SIGNAL_ACTIVATE] =
 585     g_signal_new ("activate", G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
 586                   G_STRUCT_OFFSET (GApplicationClass, activate),
 587                   NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
 588
 589
 590   /**
 591    * GApplication::open:
 592    * @application: the application
 593    * @files: (array length=n_files) (element-type GFile): an array of #GFiles
 594    * @n_files: the length of @files
 595    * @hint: a hint provided by the calling instance
 596    *
 597    * The ::open signal is emitted on the primary instance when there are
 598    * files to open. See g_application_open() for more information.
 599    */
 600   g_application_signals[SIGNAL_OPEN] =
 601     g_signal_new ("open", G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
 602                   G_STRUCT_OFFSET (GApplicationClass, open),
 603                   NULL, NULL, _gio_marshal_VOID__POINTER_INT_STRING,
 604                   G_TYPE_NONE, 3, G_TYPE_POINTER, G_TYPE_INT, G_TYPE_STRING);
 605
 606   /**
 607    * GApplication::command-line:
 608    * @application: the application
 609    * @command_line: a #GApplicationCommandLine representing the
 610    *     passed commandline
 611    *
 612    * The ::command-line signal is emitted on the primary instance when
 613    * a commandline is not handled locally. See g_application_run() and
 614    * the #GApplicationCommandline documentation for more information.
 615    *
 616    * Returns: An integer that is set as the exit status for the calling
 617    *   process. See g_application_command_line_set_exit_status().
 618    */
 619   g_application_signals[SIGNAL_COMMAND_LINE] =
 620     g_signal_new ("command-line", G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
 621                   G_STRUCT_OFFSET (GApplicationClass, command_line),
 622                   g_signal_accumulator_first_wins, NULL,
 623                   _gio_marshal_INT__OBJECT,
 624                   G_TYPE_INT, 1, G_TYPE_APPLICATION_COMMAND_LINE);
 625
 626   g_type_class_add_private (class, sizeof (GApplicationPrivate));
 627 }
 628
 629 static GVariant *
 630 get_platform_data (GApplication *application)
 631 {
 632   GVariantBuilder *builder;
 633   GVariant *result;
 634
 635   builder = g_variant_builder_new (G_VARIANT_TYPE ("a{sv}"));
 636
 637   {
 638     gchar *cwd = g_get_current_dir ();
 639     g_variant_builder_add (builder, "{sv}", "cwd",
 640                            g_variant_new_bytestring (cwd));
 641     g_free (cwd);
 642   }
 643
 644   if (application->priv->flags & G_APPLICATION_SEND_ENVIRONMENT)
 645     {
 646       GVariant *array;
 647       gchar **envp;
 648
 649       envp = g_get_environ ();
 650       array = g_variant_new_bytestring_array ((const gchar **) envp, -1);
 651       g_strfreev (envp);
 652
 653       g_variant_builder_add (builder, "{sv}", "environ", array);
 654     }
 655
 656   G_APPLICATION_GET_CLASS (application)->
 657     add_platform_data (application, builder);
 658
 659   result = g_variant_builder_end (builder);
 660   g_variant_builder_unref (builder);
 661
 662   return result;
 663 }
 664
 665 /* Application ID validity {{{1 */
 666
 667 /**
 668  * g_application_id_is_valid:
 669  * @application_id: a potential application identifier
 670  * @returns: %TRUE if @application_id is valid
 671  *
 672  * Checks if @application_id is a valid application identifier.
 673  *
 674  * A valid ID is required for calls to g_application_new() and
 675  * g_application_set_application_id().
 676  *
 677  * For convenience, the restrictions on application identifiers are
 678  * reproduced here:
 679  * <itemizedlist>
 680  *   <listitem>Application identifiers must contain only the ASCII characters "[A-Z][a-z][0-9]_-." and must not begin with a digit.</listitem>
 681  *   <listitem>Application identifiers must contain at least one '.' (period) character (and thus at least three elements).</listitem>
 682  *   <listitem>Application identifiers must not begin or end with a '.' (period) character.</listitem>
 683  *   <listitem>Application identifiers must not contain consecutive '.' (period) characters.</listitem>
 684  *   <listitem>Application identifiers must not exceed 255 characters.</listitem>
 685  * </itemizedlist>
 686  **/
 687 gboolean
 688 g_application_id_is_valid (const gchar *application_id)
 689 {
 690   gsize len;
 691   gboolean allow_dot;
 692   gboolean has_dot;
 693
 694   len = strlen (application_id);
 695
 696   if (len > 255)
 697     return FALSE;
 698
 699   if (!g_ascii_isalpha (application_id[0]))
 700     return FALSE;
 701
 702   if (application_id[len-1] == '.')
 703     return FALSE;
 704
 705   application_id++;
 706   allow_dot = TRUE;
 707   has_dot = FALSE;
 708   for (; *application_id; application_id++)
 709     {
 710       if (g_ascii_isalnum (*application_id) ||
 711           (*application_id == '-') ||
 712           (*application_id == '_'))
 713         {
 714           allow_dot = TRUE;
 715         }
 716       else if (allow_dot && *application_id == '.')
 717         {
 718           has_dot = TRUE;
 719           allow_dot = FALSE;
 720         }
 721       else
 722         return FALSE;
 723     }
 724
 725   if (!has_dot)
 726     return FALSE;
 727
 728   return TRUE;
 729 }
 730
 731 /* Public Constructor {{{1 */
 732 /**
 733  * g_application_new:
 734  * @application_id: the application id
 735  * @flags: the application flags
 736  * @returns: a new #GApplication instance
 737  *
 738  * Creates a new #GApplication instance.
 739  *
 740  * This function calls g_type_init() for you.
 741  *
 742  * The application id must be valid.  See g_application_id_is_valid().
 743  **/
 744 GApplication *
 745 g_application_new (const gchar       *application_id,
 746                    GApplicationFlags  flags)
 747 {
 748   g_return_val_if_fail (g_application_id_is_valid (application_id), NULL);
 749
 750   g_type_init ();
 751
 752   return g_object_new (G_TYPE_APPLICATION,
 753                        "application-id", application_id,
 754                        "flags", flags,
 755                        NULL);
 756 }
 757
 758 /* Simple get/set: application id, flags, inactivity timeout {{{1 */
 759 /**
 760  * g_application_get_application_id:
 761  * @application: a #GApplication
 762  * @returns: the identifier for @application, owned by @application
 763  *
 764  * Gets the unique identifier for @application.
 765  *
 766  * Since: 2.28
 767  **/
 768 const gchar *
 769 g_application_get_application_id (GApplication *application)
 770 {
 771   g_return_val_if_fail (G_IS_APPLICATION (application), NULL);
 772
 773   return application->priv->id;
 774 }
 775
 776 /**
 777  * g_application_set_application_id:
 778  * @application: a #GApplication
 779  * @application_id: the identifier for @application
 780  *
 781  * Sets the unique identifier for @application.
 782  *
 783  * The application id can only be modified if @application has not yet
 784  * been registered.
 785  *
 786  * The application id must be valid.  See g_application_id_is_valid().
 787  *
 788  * Since: 2.28
 789  **/
 790 void
 791 g_application_set_application_id (GApplication *application,
 792                                   const gchar  *application_id)
 793 {
 794   g_return_if_fail (G_IS_APPLICATION (application));
 795
 796   if (g_strcmp0 (application->priv->id, application_id) != 0)
 797     {
 798       g_return_if_fail (g_application_id_is_valid (application_id));
 799       g_return_if_fail (!application->priv->is_registered);
 800
 801       g_free (application->priv->id);
 802       application->priv->id = g_strdup (application_id);
 803
 804       g_object_notify (G_OBJECT (application), "application-id");
 805     }
 806 }
 807
 808 /**
 809  * g_application_get_flags:
 810  * @application: a #GApplication
 811  * @returns: the flags for @application
 812  *
 813  * Gets the flags for @application.
 814  *
 815  * See #GApplicationFlags.
 816  *
 817  * Since: 2.28
 818  **/
 819 GApplicationFlags
 820 g_application_get_flags (GApplication *application)
 821 {
 822   g_return_val_if_fail (G_IS_APPLICATION (application), 0);
 823
 824   return application->priv->flags;
 825 }
 826
 827 /**
 828  * g_application_set_flags:
 829  * @application: a #GApplication
 830  * @flags: the flags for @application
 831  *
 832  * Sets the flags for @application.
 833  *
 834  * The flags can only be modified if @application has not yet been
 835  * registered.
 836  *
 837  * See #GApplicationFlags.
 838  *
 839  * Since: 2.28
 840  **/
 841 void
 842 g_application_set_flags (GApplication      *application,
 843                          GApplicationFlags  flags)
 844 {
 845   g_return_if_fail (G_IS_APPLICATION (application));
 846
 847   if (application->priv->flags != flags)
 848     {
 849       g_return_if_fail (!application->priv->is_registered);
 850
 851       application->priv->flags = flags;
 852
 853       g_object_notify (G_OBJECT (application), "flags");
 854     }
 855 }
 856
 857 /**
 858  * g_application_get_inactivity_timeout:
 859  * @application: a #GApplication
 860  *
 861  * Gets the current inactivity timeout for the application.
 862  *
 863  * This is the amount of time (in milliseconds) after the last call to
 864  * g_application_release() before the application stops running.
 865  *
 866  * Returns: the timeout, in milliseconds
 867  *
 868  * Since: 2.28
 869  **/
 870 guint
 871 g_application_get_inactivity_timeout (GApplication *application)
 872 {
 873   g_return_val_if_fail (G_IS_APPLICATION (application), 0);
 874
 875   return application->priv->inactivity_timeout;
 876 }
 877
 878 /**
 879  * g_application_set_inactivity_timeout:
 880  * @application: a #GApplication
 881  * @inactivity_timeout: the timeout, in milliseconds
 882  *
 883  * Sets the current inactivity timeout for the application.
 884  *
 885  * This is the amount of time (in milliseconds) after the last call to
 886  * g_application_release() before the application stops running.
 887  *
 888  * This call has no side effects of its own.  The value set here is only
 889  * used for next time g_application_release() drops the use count to
 890  * zero.  Any timeouts currently in progress are not impacted.
 891  *
 892  * Returns: the timeout, in milliseconds
 893  *
 894  * Since: 2.28
 895  **/
 896 void
 897 g_application_set_inactivity_timeout (GApplication *application,
 898                                       guint         inactivity_timeout)
 899 {
 900   g_return_if_fail (G_IS_APPLICATION (application));
 901
 902   if (application->priv->inactivity_timeout != inactivity_timeout)
 903     {
 904       application->priv->inactivity_timeout = inactivity_timeout;
 905
 906       g_object_notify (G_OBJECT (application), "inactivity-timeout");
 907     }
 908 }
 909 /* Read-only property getters (is registered, is remote) {{{1 */
 910 /**
 911  * g_application_get_is_registered:
 912  * @application: a #GApplication
 913  * @returns: %TRUE if @application is registered
 914  *
 915  * Checks if @application is registered.
 916  *
 917  * An application is registered if g_application_register() has been
 918  * successfully called.
 919  *
 920  * Since: 2.28
 921  **/
 922 gboolean
 923 g_application_get_is_registered (GApplication *application)
 924 {
 925   g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
 926
 927   return application->priv->is_registered;
 928 }
 929
 930 /**
 931  * g_application_get_is_remote:
 932  * @application: a #GApplication
 933  * @returns: %TRUE if @application is remote
 934  *
 935  * Checks if @application is remote.
 936  *
 937  * If @application is remote then it means that another instance of
 938  * application already exists (the 'primary' instance).  Calls to
 939  * perform actions on @application will result in the actions being
 940  * performed by the primary instance.
 941  *
 942  * The value of this property can not be accessed before
 943  * g_application_register() has been called.  See
 944  * g_application_get_is_registered().
 945  *
 946  * Since: 2.28
 947  **/
 948 gboolean
 949 g_application_get_is_remote (GApplication *application)
 950 {
 951   g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
 952   g_return_val_if_fail (application->priv->is_registered, FALSE);
 953
 954   return application->priv->is_remote;
 955 }
 956
 957 /* Register {{{1 */
 958 /**
 959  * g_application_register:
 960  * @application: a #GApplication
 961  * @cancellable: a #GCancellable, or %NULL
 962  * @error: a pointer to a NULL #GError, or %NULL
 963  * @returns: %TRUE if registration succeeded
 964  *
 965  * Attempts registration of the application.
 966  *
 967  * This is the point at which the application discovers if it is the
 968  * primary instance or merely acting as a remote for an already-existing
 969  * primary instance.  This is implemented by attempting to acquire the
 970  * application identifier as a unique bus name on the session bus using
 971  * GDBus.
 972  *
 973  * Due to the internal architecture of GDBus, method calls can be
 974  * dispatched at any time (even if a main loop is not running).  For
 975  * this reason, you must ensure that any object paths that you wish to
 976  * register are registered before calling this function.
 977  *
 978  * If the application has already been registered then %TRUE is
 979  * returned with no work performed.
 980  *
 981  * The #GApplication::startup signal is emitted if registration succeeds
 982  * and @application is the primary instance.
 983  *
 984  * In the event of an error (such as @cancellable being cancelled, or a
 985  * failure to connect to the session bus), %FALSE is returned and @error
 986  * is set appropriately.
 987  *
 988  * Note: the return value of this function is not an indicator that this
 989  * instance is or is not the primary instance of the application.  See
 990  * g_application_get_is_remote() for that.
 991  *
 992  * Since: 2.28
 993  **/
 994 gboolean
 995 g_application_register (GApplication  *application,
 996                         GCancellable  *cancellable,
 997                         GError       **error)
 998 {
 999   g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
1000
1001   if (!application->priv->is_registered)
1002     {
1003       application->priv->impl =
1004         g_application_impl_register (application, application->priv->id,
1005                                      application->priv->flags,
1006                                      &application->priv->remote_actions,
1007                                      cancellable, error);
1008
1009       if (application->priv->impl == NULL)
1010         return FALSE;
1011
1012       application->priv->is_remote = application->priv->remote_actions != NULL;
1013       application->priv->is_registered = TRUE;
1014
1015       g_object_notify (G_OBJECT (application), "is-registered");
1016
1017       if (!application->priv->is_remote)
1018         g_signal_emit (application, g_application_signals[SIGNAL_STARTUP], 0);
1019     }
1020
1021   return TRUE;
1022 }
1023
1024 /* Hold/release {{{1 */
1025 /**
1026  * g_application_hold:
1027  * @application: a #GApplication
1028  *
1029  * Increases the use count of @application.
1030  *
1031  * Use this function to indicate that the application has a reason to
1032  * continue to run.  For example, g_application_hold() is called by GTK+
1033  * when a toplevel window is on the screen.
1034  *
1035  * To cancel the hold, call g_application_release().
1036  **/
1037 void
1038 g_application_hold (GApplication *application)
1039 {
1040   if (application->priv->inactivity_timeout_id)
1041     {
1042       g_source_remove (application->priv->inactivity_timeout_id);
1043       application->priv->inactivity_timeout_id = 0;
1044     }
1045
1046   application->priv->use_count++;
1047 }
1048
1049 static gboolean
1050 inactivity_timeout_expired (gpointer data)
1051 {
1052   GApplication *application = G_APPLICATION (data);
1053
1054   G_APPLICATION_GET_CLASS (application)
1055     ->quit_mainloop (application);
1056
1057   return FALSE;
1058 }
1059
1060
1061 /**
1062  * g_application_release:
1063  * @application: a #GApplication
1064  *
1065  * Decrease the use count of @application.
1066  *
1067  * When the use count reaches zero, the application will stop running.
1068  *
1069  * Never call this function except to cancel the effect of a previous
1070  * call to g_application_hold().
1071  **/
1072 void
1073 g_application_release (GApplication *application)
1074 {
1075   application->priv->use_count--;
1076
1077   if (application->priv->use_count == 0)
1078     {
1079       if (application->priv->inactivity_timeout)
1080         application->priv->inactivity_timeout_id =
1081           g_timeout_add (application->priv->inactivity_timeout,
1082                          inactivity_timeout_expired, application);
1083
1084       else
1085         G_APPLICATION_GET_CLASS (application)
1086           ->quit_mainloop (application);
1087     }
1088 }
1089
1090 /* Activate, Open {{{1 */
1091 /**
1092  * g_application_activate:
1093  * @application: a #GApplication
1094  *
1095  * Activates the application.
1096  *
1097  * In essence, this results in the #GApplication::activate() signal being
1098  * emitted in the primary instance.
1099  *
1100  * The application must be registered before calling this function.
1101  *
1102  * Since: 2.28
1103  **/
1104 void
1105 g_application_activate (GApplication *application)
1106 {
1107   g_return_if_fail (G_IS_APPLICATION (application));
1108   g_return_if_fail (application->priv->is_registered);
1109
1110   if (application->priv->is_remote)
1111     g_application_impl_activate (application->priv->impl,
1112                                  get_platform_data (application));
1113
1114   else
1115     g_signal_emit (application, g_application_signals[SIGNAL_ACTIVATE], 0);
1116 }
1117
1118 /**
1119  * g_application_open:
1120  * @application: a #GApplication
1121  * @files: (array length=n_files): an array of #GFiles to open
1122  * @n_files: the length of the @files array
1123  * @hint: a hint (or ""), but never %NULL
1124  *
1125  * Opens the given files.
1126  *
1127  * In essence, this results in the #GApplication::open signal being emitted
1128  * in the primary instance.
1129  *
1130  * @n_files must be greater than zero.
1131  *
1132  * @hint is simply passed through to the ::open signal.  It is
1133  * intended to be used by applications that have multiple modes for
1134  * opening files (eg: "view" vs "edit", etc).  Unless you have a need
1135  * for this functionality, you should use "".
1136  *
1137  * The application must be registered before calling this function
1138  * and it must have the %G_APPLICATION_HANDLES_OPEN flag set.
1139  *
1140  * Since: 2.28
1141  **/
1142 void
1143 g_application_open (GApplication  *application,
1144                     GFile        **files,
1145                     gint           n_files,
1146                     const gchar   *hint)
1147 {
1148   g_return_if_fail (G_IS_APPLICATION (application));
1149   g_return_if_fail (application->priv->flags &
1150                     G_APPLICATION_HANDLES_OPEN);
1151   g_return_if_fail (application->priv->is_registered);
1152
1153   if (application->priv->is_remote)
1154     g_application_impl_open (application->priv->impl,
1155                              files, n_files, hint,
1156                              get_platform_data (application));
1157
1158   else
1159     g_signal_emit (application, g_application_signals[SIGNAL_OPEN],
1160                    0, files, n_files, hint);
1161 }
1162
1163 /* Run {{{1 */
1164 /**
1165  * g_application_run:
1166  * @application: a #GApplication
1167  * @argc: the argc from main() (or 0 if @argv is %NULL)
1168  * @argv: (array length=argc): the argv from main(), or %NULL
1169  * @returns: the exit status
1170  *
1171  * Runs the application.
1172  *
1173  * This function is intended to be run from main() and its return value
1174  * is intended to be returned by main(). Although you are expected to pass
1175  * the @argc, @argv parameters from main() to this function, it is possible
1176  * to pass %NULL if @argv is not available or commandline handling is not
1177  * required.
1178  *
1179  * First, the local_command_line() virtual function is invoked.
1180  * This function always runs on the local instance. It gets passed a pointer
1181  * to a %NULL-terminated copy of @argv and is expected to remove the arguments
1182  * that it handled (shifting up remaining arguments). See
1183  * <xref linkend="gapplication-example-cmdline2"/> for an example of
1184  * parsing @argv manually. Alternatively, you may use the #GOptionContext API,
1185  * after setting <literal>argc = g_strv_length (argv);</literal>.
1186  *
1187  * The last argument to local_command_line() is a pointer to the @status
1188  * variable which can used to set the exit status that is returned from
1189  * g_application_run().
1190  *
1191  * If local_command_line() returns %TRUE, the command line is expected
1192  * to be completely handled, including possibly registering as the primary
1193  * instance, calling g_application_activate() or g_application_open(), etc.
1194  *
1195  * If local_command_line() returns %FALSE then the application is registered
1196  * and the #GApplication::command-line signal is emitted in the primary
1197  * instance (which may or may not be this instance).
1198  *
1199  * If the application has the %G_APPLICATION_HANDLES_COMMAND_LINE
1200  * flag set then the default implementation of local_command_line()
1201  * always returns %FALSE immediately, resulting in the commandline
1202  * always being handled in the primary instance.
1203  *
1204  * Otherwise, the default implementation of local_command_line() tries
1205  * to do a couple of things that are probably reasonable for most
1206  * applications.  First, g_application_register() is called to attempt
1207  * to register the application.  If that works, then the command line
1208  * arguments are inspected.  If no commandline arguments are given, then
1209  * g_application_activate() is called.  If commandline arguments are
1210  * given and the %G_APPLICATION_HANDLES_OPEN flag is set then they
1211  * are assumed to be filenames and g_application_open() is called.
1212  *
1213  * If you are interested in doing more complicated local handling of the
1214  * commandline then you should implement your own #GApplication subclass
1215  * and override local_command_line(). In this case, you most likely want
1216  * to return %TRUE from your local_command_line() implementation to
1217  * suppress the default handling. See
1218  * <xref linkend="gapplication-example-cmdline2"/> for an example.
1219  *
1220  * If, after the above is done, the use count of the application is zero
1221  * then the exit status is returned immediately.  If the use count is
1222  * non-zero then the mainloop is run until the use count falls to zero,
1223  * at which point 0 is returned.
1224  *
1225  * If the %G_APPLICATION_IS_SERVICE flag is set, then the exiting at
1226  * use count of zero is delayed for a while (ie: the instance stays
1227  * around to provide its <emphasis>service</emphasis> to others).
1228  *
1229  * Since: 2.28
1230  **/
1231 int
1232 g_application_run (GApplication  *application,
1233                    int            argc,
1234                    char         **argv)
1235 {
1236   gchar **arguments;
1237   int status;
1238   gint i;
1239
1240   g_return_val_if_fail (G_IS_APPLICATION (application), 1);
1241   g_return_val_if_fail (argc == 0 || argv != NULL, 1);
1242
1243   arguments = g_new (gchar *, argc + 1);
1244   for (i = 0; i < argc; i++)
1245     arguments[i] = g_strdup (argv[i]);
1246   arguments[i] = NULL;
1247
1248   if (g_get_prgname () == NULL && argc > 0)
1249     {
1250       gchar *prgname;
1251
1252       prgname = g_path_get_basename (argv[0]);
1253       g_set_prgname (prgname);
1254       g_free (prgname);
1255     }
1256
1257   if (!G_APPLICATION_GET_CLASS (application)
1258         ->local_command_line (application, &arguments, &status))
1259     {
1260       GError *error = NULL;
1261
1262       if (!g_application_register (application, NULL, &error))
1263         {
1264           g_printerr ("%s", error->message);
1265           g_error_free (error);
1266           return 1;
1267         }
1268
1269       if (application->priv->is_remote)
1270         {
1271           GVariant *platform_data;
1272
1273           platform_data = get_platform_data (application);
1274           status = g_application_impl_command_line (application->priv->impl,
1275                                                     arguments, platform_data);
1276         }
1277       else
1278         {
1279           GApplicationCommandLine *cmdline;
1280           GVariant *v;
1281
1282           v = g_variant_new_bytestring_array ((const gchar **) arguments, -1);
1283           cmdline = g_object_new (G_TYPE_APPLICATION_COMMAND_LINE,
1284                                   "arguments", v, NULL);
1285           g_signal_emit (application,
1286                          g_application_signals[SIGNAL_COMMAND_LINE],
1287                          0, cmdline, &status);
1288           g_object_unref (cmdline);
1289         }
1290     }
1291
1292   g_strfreev (arguments);
1293
1294   if (application->priv->flags & G_APPLICATION_IS_SERVICE &&
1295       application->priv->is_registered &&
1296       !application->priv->use_count &&
1297       !application->priv->inactivity_timeout_id)
1298     {
1299       application->priv->inactivity_timeout_id =
1300         g_timeout_add (10000, inactivity_timeout_expired, application);
1301     }
1302
1303   if (application->priv->use_count ||
1304       application->priv->inactivity_timeout_id)
1305     {
1306       G_APPLICATION_GET_CLASS (application)
1307         ->run_mainloop (application);
1308       status = 0;
1309     }
1310
1311   if (application->priv->impl)
1312     g_application_impl_flush (application->priv->impl);
1313
1314   return status;
1315 }
1316
1317 static gboolean
1318 g_application_has_action (GActionGroup *action_group,
1319                           const gchar  *action_name)
1320 {
1321   GApplication *application = G_APPLICATION (action_group);
1322
1323   g_return_val_if_fail (application->priv->is_registered, FALSE);
1324
1325   if (application->priv->remote_actions != NULL)
1326     return g_hash_table_lookup (application->priv->remote_actions,
1327                                 action_name) != NULL;
1328
1329   return application->priv->actions &&
1330          g_action_group_has_action (application->priv->actions, action_name);
1331 }
1332
1333 static gchar **
1334 g_application_list_actions (GActionGroup *action_group)
1335 {
1336   GApplication *application = G_APPLICATION (action_group);
1337
1338   g_return_val_if_fail (application->priv->is_registered, NULL);
1339
1340   if (application->priv->remote_actions != NULL)
1341     {
1342       GHashTableIter iter;
1343       gint n, i = 0;
1344       gchar **keys;
1345       gpointer key;
1346
1347       n = g_hash_table_size (application->priv->remote_actions);
1348       keys = g_new (gchar *, n + 1);
1349
1350       g_hash_table_iter_init (&iter, application->priv->remote_actions);
1351       while (g_hash_table_iter_next (&iter, &key, NULL))
1352         keys[i++] = g_strdup (key);
1353       g_assert_cmpint (i, ==, n);
1354       keys[n] = NULL;
1355
1356       return keys;
1357     }
1358
1359   else if (application->priv->actions != NULL)
1360     return g_action_group_list_actions (application->priv->actions);
1361
1362   else
1363     /* empty string array */
1364     return g_new0 (gchar *, 1);
1365 }
1366
1367 static gboolean
1368 g_application_get_action_enabled (GActionGroup *action_group,
1369                                   const gchar  *action_name)
1370 {
1371   GApplication *application = G_APPLICATION (action_group);
1372
1373   g_return_val_if_fail (application->priv->actions != NULL, FALSE);
1374   g_return_val_if_fail (application->priv->is_registered, FALSE);
1375
1376   if (application->priv->remote_actions)
1377     {
1378       RemoteActionInfo *info;
1379
1380       info = g_hash_table_lookup (application->priv->remote_actions,
1381                                   action_name);
1382
1383       return info && info->enabled;
1384     }
1385
1386   return g_action_group_get_action_enabled (application->priv->actions,
1387                                             action_name);
1388 }
1389
1390 static const GVariantType *
1391 g_application_get_action_parameter_type (GActionGroup *action_group,
1392                                          const gchar  *action_name)
1393 {
1394   GApplication *application = G_APPLICATION (action_group);
1395
1396   g_return_val_if_fail (application->priv->actions != NULL, NULL);
1397   g_return_val_if_fail (application->priv->is_registered, NULL);
1398
1399   if (application->priv->remote_actions)
1400     {
1401       RemoteActionInfo *info;
1402
1403       info = g_hash_table_lookup (application->priv->remote_actions,
1404                                   action_name);
1405
1406       if (info)
1407         return info->parameter_type;
1408       else
1409         return NULL;
1410     }
1411
1412   return g_action_group_get_action_parameter_type (application->priv->actions,
1413                                                    action_name);
1414 }
1415
1416 static const GVariantType *
1417 g_application_get_action_state_type (GActionGroup *action_group,
1418                                      const gchar  *action_name)
1419 {
1420   GApplication *application = G_APPLICATION (action_group);
1421
1422   g_return_val_if_fail (application->priv->actions != NULL, NULL);
1423   g_return_val_if_fail (application->priv->is_registered, NULL);
1424
1425   if (application->priv->remote_actions)
1426     {
1427       RemoteActionInfo *info;
1428
1429       info = g_hash_table_lookup (application->priv->remote_actions,
1430                                   action_name);
1431
1432       if (info && info->state)
1433         return g_variant_get_type (info->state);
1434       else
1435         return NULL;
1436     }
1437
1438   return g_action_group_get_action_state_type (application->priv->actions,
1439                                                action_name);
1440 }
1441
1442 static GVariant *
1443 g_application_get_action_state (GActionGroup *action_group,
1444                                 const gchar  *action_name)
1445 {
1446   GApplication *application = G_APPLICATION (action_group);
1447
1448   g_return_val_if_fail (application->priv->actions != NULL, NULL);
1449   g_return_val_if_fail (application->priv->is_registered, NULL);
1450
1451   if (application->priv->remote_actions)
1452     {
1453       RemoteActionInfo *info;
1454
1455       info = g_hash_table_lookup (application->priv->remote_actions,
1456                                   action_name);
1457
1458       if (info && info->state)
1459         return g_variant_ref (info->state);
1460       else
1461         return NULL;
1462     }
1463
1464   return g_action_group_get_action_state (application->priv->actions,
1465                                           action_name);
1466 }
1467
1468 static void
1469 g_application_change_action_state (GActionGroup *action_group,
1470                                    const gchar  *action_name,
1471                                    GVariant     *value)
1472 {
1473   GApplication *application = G_APPLICATION (action_group);
1474
1475   g_return_if_fail (application->priv->is_registered);
1476
1477   if (application->priv->is_remote)
1478     g_application_impl_change_action_state (application->priv->impl,
1479                                             action_name, value,
1480                                             get_platform_data (application));
1481
1482   else
1483     g_action_group_change_action_state (application->priv->actions,
1484                                         action_name, value);
1485 }
1486
1487 static void
1488 g_application_activate_action (GActionGroup *action_group,
1489                                const gchar  *action_name,
1490                                GVariant     *parameter)
1491 {
1492   GApplication *application = G_APPLICATION (action_group);
1493
1494   g_return_if_fail (application->priv->is_registered);
1495
1496   if (application->priv->is_remote)
1497     g_application_impl_activate_action (application->priv->impl,
1498                                         action_name, parameter,
1499                                         get_platform_data (application));
1500
1501   else
1502     g_action_group_activate_action (application->priv->actions,
1503                                     action_name, parameter);
1504 }
1505
1506 static void
1507 g_application_action_group_iface_init (GActionGroupInterface *iface)
1508 {
1509   iface->has_action = g_application_has_action;
1510   iface->list_actions = g_application_list_actions;
1511
1512   iface->get_action_enabled = g_application_get_action_enabled;
1513   iface->get_action_parameter_type = g_application_get_action_parameter_type;
1514   iface->get_action_state_type = g_application_get_action_state_type;
1515   iface->get_action_state = g_application_get_action_state;
1516   iface->change_action_state = g_application_change_action_state;
1517   iface->activate_action = g_application_activate_action;
1518 }
1519
1520 /* Epilogue {{{1 */
1521 /* vim:set foldmethod=marker: */