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 #include "gsettings.h"
  31
  32 #include "gioenumtypes.h"
  33 #include "gio-marshal.h"
  34 #include "gioenums.h"
  35 #include "gfile.h"
  36
  37 #include "glibintl.h"
  38
  39 #include <string.h>
  40
  41 /**
  42  * SECTION:gapplication
  43  * @title: GApplication
  44  * @short_description: Core application class
  45  *
  46  * A #GApplication is the foundation of an application, unique for a
  47  * given application identifier.  The GApplication class wraps some
  48  * low-level platform-specific services and is intended to act as the
  49  * foundation for higher-level application classes such as
  50  * #GtkApplication or #MxApplication.  In general, you should not use
  51  * this class outside of a higher level framework.
  52  *
  53  * One of the core features that GApplication provides is process
  54  * uniqueness, in the context of a "session".  The session concept is
  55  * platform-dependent, but corresponds roughly to a graphical desktop
  56  * login.  When your application is launched again, its arguments
  57  * are passed through platform communication to the already running
  58  * program. The already running instance of the program is called the
  59  * <firstterm>primary instance</firstterm>.
  60  *
  61  * Before using GApplication, you must choose an "application identifier".
  62  * The expected form of an application identifier is very close to that of
  63  * of a <ulink url="http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names-interface">DBus bus name</ulink>.
  64  * Examples include: "com.example.MyApp", "org.example.internal-apps.Calculator".
  65  * For details on valid application identifiers, see
  66  * g_application_id_is_valid().
  67  *
  68  * The application identifier is claimed by the application as a
  69  * well-known bus name on the user's session bus.  This means that the
  70  * uniqueness of your application is scoped to the current session.  It
  71  * also means that your application may provide additional services
  72  * (through registration of other object paths) at that bus name.
  73  *
  74  * The registration of these object paths should be done with the shared
  75  * GDBus session bus.  Note that due to the internal architecture of
  76  * GDBus, method calls can be dispatched at any time (even if a main
  77  * loop is not running).  For this reason, you must ensure that any
  78  * object paths that you wish to register are registered before
  79  * #GApplication attempts to acquire the bus name of your application
  80  * (which happens in g_application_register()).  Unfortunately, this
  81  * means that you cannot use g_application_get_is_remote() to decide if
  82  * you want to register object paths.
  83  *
  84  * GApplication provides convenient life cycle management by maintaining
  85  * a <firstterm>use count</firstterm> for the primary application instance.
  86  * The use count can be changed using g_application_hold() and
  87  * g_application_release(). If it drops to zero, the application exits.
  88  *
  89  * GApplication also implements the #GActionGroup interface and lets you
  90  * easily export actions by adding them with g_application_set_action_group().
  91  * When invoking an action by calling g_action_group_activate_action() on
  92  * the application, it is always invoked in the primary instance.
  93  *
  94  * There is a number of different entry points into a #GApplication:
  95  * <itemizedlist>
  96  * <listitem>via 'Activate' (i.e. just starting the application)</listitem>
  97  * <listitem>via 'Open' (i.e. opening some files)</listitem>
  98  * <listitem>by handling a command-line</listitem>
  99  * <listitem>via activating an action</listitem>
 100  * </itemizedlist>
 101  * The #GApplication::startup signal lets you handle the application
 102  * initialization for all of these in a single place.
 103  *
 104  * Regardless of which of these entry points is used to start the application,
 105  * GApplication passes some <firstterm id="platform-data">platform
 106  * data</firstterm> from the launching instance to the primary instance,
 107  * in the form of a #GVariant dictionary mapping strings to variants.
 108  * To use platform data, override the @before_emit or @after_emit virtual
 109  * functions in your #GApplication subclass. When dealing with
 110  * #GApplicationCommandline objects, the platform data is directly
 111  * available via g_application_command_line_get_cwd(),
 112  * g_application_command_line_get_environ() and
 113  * g_application_command_line_get_platform_data().
 114  *
 115  * As the name indicates, the platform data may vary depending on the
 116  * operating system, but it always includes the current directory (key
 117  * "cwd"), and optionally the environment (ie the set of environment
 118  * variables and their values) of the calling process (key "environ").
 119  * The environment is only added to the platform data if the
 120  * #G_APPLICATION_SEND_ENVIONMENT flag is set. GApplication subclasses
 121  * can add their own platform data by overriding the @add_platform_data
 122  * virtual function. For instance, #GtkApplication adds startup notification
 123  * data in this way.
 124  *
 125  * To parse commandline arguments you may handle the
 126  * #GApplication::command-line signal or override the local_command_line()
 127  * vfunc, to parse them in either the primary instance or the local instance,
 128  * respectively.
 129  *
 130  * <example id="gapplication-example-open"><title>Opening files with a GApplication</title>
 131  * <programlisting>
 132  * <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gapplication-example-open.c">
 133  *   <xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback>
 134  * </xi:include>
 135  * </programlisting>
 136  * </example>
 137  *
 138  * <example id="gapplication-example-actions"><title>A GApplication with actions</title>
 139  * <programlisting>
 140  * <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gapplication-example-actions.c">
 141  *   <xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback>
 142  * </xi:include>
 143  * </programlisting>
 144  * </example>
 145  */
 146
 147 struct _GApplicationPrivate
 148 {
 149   GApplicationFlags  flags;
 150   gchar             *id;
 151
 152   GActionGroup      *actions;
 153   GMainLoop         *mainloop;
 154
 155   guint              inactivity_timeout_id;
 156   guint              inactivity_timeout;
 157   guint              use_count;
 158
 159   guint              is_registered : 1;
 160   guint              is_remote : 1;
 161
 162   GHashTable        *remote_actions;  /* string -> RemoteActionInfo */
 163   GApplicationImpl  *impl;
 164 };
 165
 166 enum
 167 {
 168   PROP_NONE,
 169   PROP_APPLICATION_ID,
 170   PROP_FLAGS,
 171   PROP_IS_REGISTERED,
 172   PROP_IS_REMOTE,
 173   PROP_INACTIVITY_TIMEOUT,
 174   PROP_ACTION_GROUP
 175 };
 176
 177 enum
 178 {
 179   SIGNAL_STARTUP,
 180   SIGNAL_ACTIVATE,
 181   SIGNAL_OPEN,
 182   SIGNAL_ACTION,
 183   SIGNAL_COMMAND_LINE,
 184   NR_SIGNALS
 185 };
 186
 187 static guint g_application_signals[NR_SIGNALS];
 188
 189 static void g_application_action_group_iface_init (GActionGroupInterface *);
 190 G_DEFINE_TYPE_WITH_CODE (GApplication, g_application, G_TYPE_OBJECT,
 191  G_IMPLEMENT_INTERFACE (G_TYPE_ACTION_GROUP,
 192    g_application_action_group_iface_init))
 193
 194 /* vfunc defaults {{{1 */
 195 static void
 196 g_application_real_before_emit (GApplication *application,
 197                                 GVariant     *platform_data)
 198 {
 199 }
 200
 201 static void
 202 g_application_real_after_emit (GApplication *application,
 203                                GVariant     *platform_data)
 204 {
 205 }
 206
 207 static void
 208 g_application_real_startup (GApplication *application)
 209 {
 210 }
 211
 212 static void
 213 g_application_real_activate (GApplication *application)
 214 {
 215   if (!g_signal_has_handler_pending (application,
 216                                      g_application_signals[SIGNAL_ACTIVATE],
 217                                      0, TRUE) &&
 218       G_APPLICATION_GET_CLASS (application)->activate == g_application_real_activate)
 219     {
 220       static gboolean warned;
 221
 222       if (warned)
 223         return;
 224
 225       g_warning ("Your application does not implement "
 226                  "g_application_activate() and has no handlers connected "
 227                  "to the 'activate' signal.  It should do one of these.");
 228       warned = TRUE;
 229     }
 230 }
 231
 232 static void
 233 g_application_real_open (GApplication  *application,
 234                          GFile        **files,
 235                          gint           n_files,
 236                          const gchar   *hint)
 237 {
 238   if (!g_signal_has_handler_pending (application,
 239                                      g_application_signals[SIGNAL_OPEN],
 240                                      0, TRUE) &&
 241       G_APPLICATION_GET_CLASS (application)->open == g_application_real_open)
 242     {
 243       static gboolean warned;
 244
 245       if (warned)
 246         return;
 247
 248       g_warning ("Your application claims to support opening files "
 249                  "but does not implement g_application_open() and has no "
 250                  "handlers connected to the 'open' signal.");
 251       warned = TRUE;
 252     }
 253 }
 254
 255 static int
 256 g_application_real_command_line (GApplication            *application,
 257                                  GApplicationCommandLine *cmdline)
 258 {
 259   if (!g_signal_has_handler_pending (application,
 260                                      g_application_signals[SIGNAL_COMMAND_LINE],
 261                                      0, TRUE) &&
 262       G_APPLICATION_GET_CLASS (application)->command_line == g_application_real_command_line)
 263     {
 264       static gboolean warned;
 265
 266       if (warned)
 267         return 1;
 268
 269       g_warning ("Your application claims to support custom command line "
 270                  "handling but does not implement g_application_command_line() "
 271                  "and has no handlers connected to the 'command-line' signal.");
 272
 273       warned = TRUE;
 274     }
 275
 276     return 1;
 277 }
 278
 279 static gboolean
 280 g_application_real_local_command_line (GApplication   *application,
 281                                        gchar        ***arguments,
 282                                        int            *exit_status)
 283 {
 284   if (application->priv->flags & G_APPLICATION_HANDLES_COMMAND_LINE)
 285     return FALSE;
 286
 287   else
 288     {
 289       GError *error = NULL;
 290       gint n_args;
 291
 292       if (!g_application_register (application, NULL, &error))
 293         {
 294           g_critical ("%s", error->message);
 295           g_error_free (error);
 296           *exit_status = 1;
 297           return TRUE;
 298         }
 299
 300       n_args = g_strv_length (*arguments);
 301
 302       if (application->priv->flags & G_APPLICATION_IS_SERVICE)
 303         {
 304           if ((*exit_status = n_args > 1))
 305             {
 306               g_printerr ("GApplication service mode takes no arguments.\n");
 307               application->priv->flags &= ~G_APPLICATION_IS_SERVICE;
 308             }
 309
 310           return TRUE;
 311         }
 312
 313       if (n_args <= 1)
 314         {
 315           g_application_activate (application);
 316           *exit_status = 0;
 317         }
 318
 319       else
 320         {
 321           if (~application->priv->flags & G_APPLICATION_HANDLES_OPEN)
 322             {
 323               g_critical ("This application can not open files.");
 324               *exit_status = 1;
 325             }
 326           else
 327             {
 328               GFile **files;
 329               gint n_files;
 330               gint i;
 331
 332               n_files = n_args - 1;
 333               files = g_new (GFile *, n_files);
 334
 335               for (i = 0; i < n_files; i++)
 336                 files[i] = g_file_new_for_commandline_arg ((*arguments)[i + 1]);
 337
 338               g_application_open (application, files, n_files, "");
 339
 340               for (i = 0; i < n_files; i++)
 341                 g_object_unref (files[i]);
 342               g_free (files);
 343
 344               *exit_status = 0;
 345             }
 346         }
 347
 348       return TRUE;
 349     }
 350 }
 351
 352 static void
 353 g_application_real_add_platform_data (GApplication    *application,
 354                                       GVariantBuilder *builder)
 355 {
 356 }
 357
 358 static void
 359 g_application_real_quit_mainloop (GApplication *application)
 360 {
 361   if (application->priv->mainloop != NULL)
 362     g_main_loop_quit (application->priv->mainloop);
 363 }
 364
 365 static void
 366 g_application_real_run_mainloop (GApplication *application)
 367 {
 368   if (application->priv->mainloop == NULL)
 369     application->priv->mainloop = g_main_loop_new (NULL, FALSE);
 370
 371   g_main_loop_run (application->priv->mainloop);
 372 }
 373
 374 /* GObject implementation stuff {{{1 */
 375 static void
 376 g_application_set_property (GObject      *object,
 377                             guint         prop_id,
 378                             const GValue *value,
 379                             GParamSpec   *pspec)
 380 {
 381   GApplication *application = G_APPLICATION (object);
 382
 383   switch (prop_id)
 384     {
 385     case PROP_APPLICATION_ID:
 386       g_application_set_application_id (application,
 387                                         g_value_get_string (value));
 388       break;
 389
 390     case PROP_FLAGS:
 391       g_application_set_flags (application, g_value_get_flags (value));
 392       break;
 393
 394     case PROP_INACTIVITY_TIMEOUT:
 395       g_application_set_inactivity_timeout (application,
 396                                             g_value_get_uint (value));
 397       break;
 398
 399     case PROP_ACTION_GROUP:
 400       g_application_set_action_group (application,
 401                                       g_value_get_object (value));
 402       break;
 403
 404     default:
 405       g_assert_not_reached ();
 406     }
 407 }
 408
 409 /**
 410  * g_application_set_action_group:
 411  * @application: a #GApplication
 412  * @action_group: (allow-none): a #GActionGroup, or %NULL
 413  *
 414  * Sets or unsets the group of actions associated with the application.
 415  *
 416  * These actions are the actions that can be remotely invoked.
 417  *
 418  * It is an error to call this function after the application has been
 419  * registered.
 420  *
 421  * Since: 2.28
 422  **/
 423 void
 424 g_application_set_action_group (GApplication *application,
 425                                 GActionGroup *action_group)
 426 {
 427   g_return_if_fail (G_IS_APPLICATION (application));
 428   g_return_if_fail (!application->priv->is_registered);
 429
 430   if (application->priv->actions != NULL)
 431     g_object_unref (application->priv->actions);
 432
 433   application->priv->actions = action_group;
 434
 435   if (application->priv->actions != NULL)
 436     g_object_ref (application->priv->actions);
 437 }
 438
 439 static void
 440 g_application_get_property (GObject    *object,
 441                             guint       prop_id,
 442                             GValue     *value,
 443                             GParamSpec *pspec)
 444 {
 445   GApplication *application = G_APPLICATION (object);
 446
 447   switch (prop_id)
 448     {
 449     case PROP_APPLICATION_ID:
 450       g_value_set_string (value,
 451                           g_application_get_application_id (application));
 452       break;
 453
 454     case PROP_FLAGS:
 455       g_value_set_flags (value,
 456                          g_application_get_flags (application));
 457       break;
 458
 459     case PROP_IS_REGISTERED:
 460       g_value_set_boolean (value,
 461                            g_application_get_is_registered (application));
 462       break;
 463
 464     case PROP_IS_REMOTE:
 465       g_value_set_boolean (value,
 466                            g_application_get_is_remote (application));
 467       break;
 468
 469     case PROP_INACTIVITY_TIMEOUT:
 470       g_value_set_uint (value,
 471                         g_application_get_inactivity_timeout (application));
 472       break;
 473
 474     default:
 475       g_assert_not_reached ();
 476     }
 477 }
 478
 479 static void
 480 g_application_constructed (GObject *object)
 481 {
 482   GApplication *application = G_APPLICATION (object);
 483
 484   g_assert (application->priv->id != NULL);
 485 }
 486
 487 static void
 488 g_application_finalize (GObject *object)
 489 {
 490   GApplication *application = G_APPLICATION (object);
 491
 492   if (application->priv->impl)
 493     g_application_impl_destroy (application->priv->impl);
 494   g_free (application->priv->id);
 495
 496   if (application->priv->mainloop)
 497     g_main_loop_unref (application->priv->mainloop);
 498
 499   G_OBJECT_CLASS (g_application_parent_class)
 500     ->finalize (object);
 501 }
 502
 503 static void
 504 g_application_init (GApplication *application)
 505 {
 506   application->priv = G_TYPE_INSTANCE_GET_PRIVATE (application,
 507                                                    G_TYPE_APPLICATION,
 508                                                    GApplicationPrivate);
 509 }
 510
 511 static void
 512 g_application_class_init (GApplicationClass *class)
 513 {
 514   GObjectClass *object_class = G_OBJECT_CLASS (class);
 515
 516   object_class->constructed = g_application_constructed;
 517   object_class->finalize = g_application_finalize;
 518   object_class->get_property = g_application_get_property;
 519   object_class->set_property = g_application_set_property;
 520
 521   class->before_emit = g_application_real_before_emit;
 522   class->after_emit = g_application_real_after_emit;
 523   class->startup = g_application_real_startup;
 524   class->activate = g_application_real_activate;
 525   class->open = g_application_real_open;
 526   class->command_line = g_application_real_command_line;
 527   class->local_command_line = g_application_real_local_command_line;
 528   class->add_platform_data = g_application_real_add_platform_data;
 529   class->quit_mainloop = g_application_real_quit_mainloop;
 530   class->run_mainloop = g_application_real_run_mainloop;
 531
 532   g_object_class_install_property (object_class, PROP_APPLICATION_ID,
 533     g_param_spec_string ("application-id",
 534                          P_("Application identifier"),
 535                          P_("The unique identifier for the application"),
 536                          NULL, G_PARAM_READWRITE | G_PARAM_CONSTRUCT |
 537                          G_PARAM_STATIC_STRINGS));
 538
 539   g_object_class_install_property (object_class, PROP_FLAGS,
 540     g_param_spec_flags ("flags",
 541                         P_("Application flags"),
 542                         P_("Flags specifying the behaviour of the application"),
 543                         G_TYPE_APPLICATION_FLAGS, G_APPLICATION_FLAGS_NONE,
 544                         G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 545
 546   g_object_class_install_property (object_class, PROP_IS_REGISTERED,
 547     g_param_spec_boolean ("is-registered",
 548                           P_("Is registered"),
 549                           P_("If g_application_register() has been called"),
 550                           FALSE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
 551
 552   g_object_class_install_property (object_class, PROP_IS_REMOTE,
 553     g_param_spec_boolean ("is-remote",
 554                           P_("Is remote"),
 555                           P_("If this application instance is remote"),
 556                           FALSE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
 557
 558   g_object_class_install_property (object_class, PROP_INACTIVITY_TIMEOUT,
 559     g_param_spec_uint ("inactivity-timeout",
 560                        P_("Inactivity timeout"),
 561                        P_("Time (ms) to stay alive after becoming idle"),
 562                        0, G_MAXUINT, 0,
 563                        G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 564
 565   g_object_class_install_property (object_class, PROP_ACTION_GROUP,
 566     g_param_spec_object ("action-group",
 567                          P_("Action group"),
 568                          P_("The group of actions that the application exports"),
 569                          G_TYPE_ACTION_GROUP,
 570                          G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
 571
 572   /**
 573    * GApplication::startup:
 574    * @application: the application
 575    *
 576    * The ::startup signal is emitted on the primary instance immediately
 577    * after registration. See g_application_register().
 578    */
 579   g_application_signals[SIGNAL_STARTUP] =
 580     g_signal_new ("startup", G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
 581                   G_STRUCT_OFFSET (GApplicationClass, startup),
 582                   NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
 583
 584   /**
 585    * GApplication::activate:
 586    * @application: the application
 587    *
 588    * The ::activate signal is emitted on the primary instance when an
 589    * activation occurs. See g_application_activate().
 590    */
 591   g_application_signals[SIGNAL_ACTIVATE] =
 592     g_signal_new ("activate", G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
 593                   G_STRUCT_OFFSET (GApplicationClass, activate),
 594                   NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
 595
 596
 597   /**
 598    * GApplication::open:
 599    * @application: the application
 600    * @files: (array length=n_files) (element-type GFile): an array of #GFiles
 601    * @n_files: the length of @files
 602    * @hint: a hint provided by the calling instance
 603    *
 604    * The ::open signal is emitted on the primary instance when there are
 605    * files to open. See g_application_open() for more information.
 606    */
 607   g_application_signals[SIGNAL_OPEN] =
 608     g_signal_new ("open", G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
 609                   G_STRUCT_OFFSET (GApplicationClass, open),
 610                   NULL, NULL, _gio_marshal_VOID__POINTER_INT_STRING,
 611                   G_TYPE_NONE, 3, G_TYPE_POINTER, G_TYPE_INT, G_TYPE_STRING);
 612
 613   /**
 614    * GApplication::command-line:
 615    * @application: the application
 616    * @command_line: a #GApplicationCommandLine representing the
 617    *     passed commandline
 618    *
 619    * The ::command-line signal is emitted on the primary instance when
 620    * a commandline is not handled locally. See g_application_run() and
 621    * the #GApplicationCommandline documentation for more information.
 622    *
 623    * Returns: An integer that is set as the exit status for the calling
 624    *   process. See g_application_command_line_set_exit_status().
 625    */
 626   g_application_signals[SIGNAL_COMMAND_LINE] =
 627     g_signal_new ("command-line", G_TYPE_APPLICATION, G_SIGNAL_RUN_LAST,
 628                   G_STRUCT_OFFSET (GApplicationClass, command_line),
 629                   g_signal_accumulator_first_wins, NULL,
 630                   _gio_marshal_INT__OBJECT,
 631                   G_TYPE_INT, 1, G_TYPE_APPLICATION_COMMAND_LINE);
 632
 633   g_type_class_add_private (class, sizeof (GApplicationPrivate));
 634 }
 635
 636 static GVariant *
 637 get_platform_data (GApplication *application)
 638 {
 639   GVariantBuilder *builder;
 640   GVariant *result;
 641
 642   builder = g_variant_builder_new (G_VARIANT_TYPE ("a{sv}"));
 643
 644   {
 645     gchar *cwd = g_get_current_dir ();
 646     g_variant_builder_add (builder, "{sv}", "cwd",
 647                            g_variant_new_bytestring (cwd));
 648     g_free (cwd);
 649   }
 650
 651   if (application->priv->flags & G_APPLICATION_SEND_ENVIRONMENT)
 652     {
 653       GVariant *array;
 654       gchar **envp;
 655
 656       envp = g_get_environ ();
 657       array = g_variant_new_bytestring_array ((const gchar **) envp, -1);
 658       g_strfreev (envp);
 659
 660       g_variant_builder_add (builder, "{sv}", "environ", array);
 661     }
 662
 663   G_APPLICATION_GET_CLASS (application)->
 664     add_platform_data (application, builder);
 665
 666   result = g_variant_builder_end (builder);
 667   g_variant_builder_unref (builder);
 668
 669   return result;
 670 }
 671
 672 /* Application ID validity {{{1 */
 673
 674 /**
 675  * g_application_id_is_valid:
 676  * @application_id: a potential application identifier
 677  * @returns: %TRUE if @application_id is valid
 678  *
 679  * Checks if @application_id is a valid application identifier.
 680  *
 681  * A valid ID is required for calls to g_application_new() and
 682  * g_application_set_application_id().
 683  *
 684  * For convenience, the restrictions on application identifiers are
 685  * reproduced here:
 686  * <itemizedlist>
 687  *   <listitem>Application identifiers must contain only the ASCII characters "[A-Z][a-z][0-9]_-." and must not begin with a digit.</listitem>
 688  *   <listitem>Application identifiers must contain at least one '.' (period) character (and thus at least three elements).</listitem>
 689  *   <listitem>Application identifiers must not begin or end with a '.' (period) character.</listitem>
 690  *   <listitem>Application identifiers must not contain consecutive '.' (period) characters.</listitem>
 691  *   <listitem>Application identifiers must not exceed 255 characters.</listitem>
 692  * </itemizedlist>
 693  **/
 694 gboolean
 695 g_application_id_is_valid (const gchar *application_id)
 696 {
 697   gsize len;
 698   gboolean allow_dot;
 699   gboolean has_dot;
 700
 701   len = strlen (application_id);
 702
 703   if (len > 255)
 704     return FALSE;
 705
 706   if (!g_ascii_isalpha (application_id[0]))
 707     return FALSE;
 708
 709   if (application_id[len-1] == '.')
 710     return FALSE;
 711
 712   application_id++;
 713   allow_dot = TRUE;
 714   has_dot = FALSE;
 715   for (; *application_id; application_id++)
 716     {
 717       if (g_ascii_isalnum (*application_id) ||
 718           (*application_id == '-') ||
 719           (*application_id == '_'))
 720         {
 721           allow_dot = TRUE;
 722         }
 723       else if (allow_dot && *application_id == '.')
 724         {
 725           has_dot = TRUE;
 726           allow_dot = FALSE;
 727         }
 728       else
 729         return FALSE;
 730     }
 731
 732   if (!has_dot)
 733     return FALSE;
 734
 735   return TRUE;
 736 }
 737
 738 /* Public Constructor {{{1 */
 739 /**
 740  * g_application_new:
 741  * @application_id: the application id
 742  * @flags: the application flags
 743  * @returns: a new #GApplication instance
 744  *
 745  * Creates a new #GApplication instance.
 746  *
 747  * This function calls g_type_init() for you.
 748  *
 749  * The application id must be valid.  See g_application_id_is_valid().
 750  **/
 751 GApplication *
 752 g_application_new (const gchar       *application_id,
 753                    GApplicationFlags  flags)
 754 {
 755   g_return_val_if_fail (g_application_id_is_valid (application_id), NULL);
 756
 757   g_type_init ();
 758
 759   return g_object_new (G_TYPE_APPLICATION,
 760                        "application-id", application_id,
 761                        "flags", flags,
 762                        NULL);
 763 }
 764
 765 /* Simple get/set: application id, flags, inactivity timeout {{{1 */
 766 /**
 767  * g_application_get_application_id:
 768  * @application: a #GApplication
 769  * @returns: the identifier for @application, owned by @application
 770  *
 771  * Gets the unique identifier for @application.
 772  *
 773  * Since: 2.28
 774  **/
 775 const gchar *
 776 g_application_get_application_id (GApplication *application)
 777 {
 778   g_return_val_if_fail (G_IS_APPLICATION (application), NULL);
 779
 780   return application->priv->id;
 781 }
 782
 783 /**
 784  * g_application_set_application_id:
 785  * @application: a #GApplication
 786  * @application_id: the identifier for @application
 787  *
 788  * Sets the unique identifier for @application.
 789  *
 790  * The application id can only be modified if @application has not yet
 791  * been registered.
 792  *
 793  * The application id must be valid.  See g_application_id_is_valid().
 794  *
 795  * Since: 2.28
 796  **/
 797 void
 798 g_application_set_application_id (GApplication *application,
 799                                   const gchar  *application_id)
 800 {
 801   g_return_if_fail (G_IS_APPLICATION (application));
 802
 803   if (g_strcmp0 (application->priv->id, application_id) != 0)
 804     {
 805       g_return_if_fail (g_application_id_is_valid (application_id));
 806       g_return_if_fail (!application->priv->is_registered);
 807
 808       g_free (application->priv->id);
 809       application->priv->id = g_strdup (application_id);
 810
 811       g_object_notify (G_OBJECT (application), "application-id");
 812     }
 813 }
 814
 815 /**
 816  * g_application_get_flags:
 817  * @application: a #GApplication
 818  * @returns: the flags for @application
 819  *
 820  * Gets the flags for @application.
 821  *
 822  * See #GApplicationFlags.
 823  *
 824  * Since: 2.28
 825  **/
 826 GApplicationFlags
 827 g_application_get_flags (GApplication *application)
 828 {
 829   g_return_val_if_fail (G_IS_APPLICATION (application), 0);
 830
 831   return application->priv->flags;
 832 }
 833
 834 /**
 835  * g_application_set_flags:
 836  * @application: a #GApplication
 837  * @flags: the flags for @application
 838  *
 839  * Sets the flags for @application.
 840  *
 841  * The flags can only be modified if @application has not yet been
 842  * registered.
 843  *
 844  * See #GApplicationFlags.
 845  *
 846  * Since: 2.28
 847  **/
 848 void
 849 g_application_set_flags (GApplication      *application,
 850                          GApplicationFlags  flags)
 851 {
 852   g_return_if_fail (G_IS_APPLICATION (application));
 853
 854   if (application->priv->flags != flags)
 855     {
 856       g_return_if_fail (!application->priv->is_registered);
 857
 858       application->priv->flags = flags;
 859
 860       g_object_notify (G_OBJECT (application), "flags");
 861     }
 862 }
 863
 864 /**
 865  * g_application_get_inactivity_timeout:
 866  * @application: a #GApplication
 867  *
 868  * Gets the current inactivity timeout for the application.
 869  *
 870  * This is the amount of time (in milliseconds) after the last call to
 871  * g_application_release() before the application stops running.
 872  *
 873  * Returns: the timeout, in milliseconds
 874  *
 875  * Since: 2.28
 876  **/
 877 guint
 878 g_application_get_inactivity_timeout (GApplication *application)
 879 {
 880   g_return_val_if_fail (G_IS_APPLICATION (application), 0);
 881
 882   return application->priv->inactivity_timeout;
 883 }
 884
 885 /**
 886  * g_application_set_inactivity_timeout:
 887  * @application: a #GApplication
 888  * @inactivity_timeout: the timeout, in milliseconds
 889  *
 890  * Sets the current inactivity timeout for the application.
 891  *
 892  * This is the amount of time (in milliseconds) after the last call to
 893  * g_application_release() before the application stops running.
 894  *
 895  * This call has no side effects of its own.  The value set here is only
 896  * used for next time g_application_release() drops the use count to
 897  * zero.  Any timeouts currently in progress are not impacted.
 898  *
 899  * Returns: the timeout, in milliseconds
 900  *
 901  * Since: 2.28
 902  **/
 903 void
 904 g_application_set_inactivity_timeout (GApplication *application,
 905                                       guint         inactivity_timeout)
 906 {
 907   g_return_if_fail (G_IS_APPLICATION (application));
 908
 909   if (application->priv->inactivity_timeout != inactivity_timeout)
 910     {
 911       application->priv->inactivity_timeout = inactivity_timeout;
 912
 913       g_object_notify (G_OBJECT (application), "inactivity-timeout");
 914     }
 915 }
 916 /* Read-only property getters (is registered, is remote) {{{1 */
 917 /**
 918  * g_application_get_is_registered:
 919  * @application: a #GApplication
 920  * @returns: %TRUE if @application is registered
 921  *
 922  * Checks if @application is registered.
 923  *
 924  * An application is registered if g_application_register() has been
 925  * successfully called.
 926  *
 927  * Since: 2.28
 928  **/
 929 gboolean
 930 g_application_get_is_registered (GApplication *application)
 931 {
 932   g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
 933
 934   return application->priv->is_registered;
 935 }
 936
 937 /**
 938  * g_application_get_is_remote:
 939  * @application: a #GApplication
 940  * @returns: %TRUE if @application is remote
 941  *
 942  * Checks if @application is remote.
 943  *
 944  * If @application is remote then it means that another instance of
 945  * application already exists (the 'primary' instance).  Calls to
 946  * perform actions on @application will result in the actions being
 947  * performed by the primary instance.
 948  *
 949  * The value of this property cannot be accessed before
 950  * g_application_register() has been called.  See
 951  * g_application_get_is_registered().
 952  *
 953  * Since: 2.28
 954  **/
 955 gboolean
 956 g_application_get_is_remote (GApplication *application)
 957 {
 958   g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
 959   g_return_val_if_fail (application->priv->is_registered, FALSE);
 960
 961   return application->priv->is_remote;
 962 }
 963
 964 /* Register {{{1 */
 965 /**
 966  * g_application_register:
 967  * @application: a #GApplication
 968  * @cancellable: a #GCancellable, or %NULL
 969  * @error: a pointer to a NULL #GError, or %NULL
 970  * @returns: %TRUE if registration succeeded
 971  *
 972  * Attempts registration of the application.
 973  *
 974  * This is the point at which the application discovers if it is the
 975  * primary instance or merely acting as a remote for an already-existing
 976  * primary instance.  This is implemented by attempting to acquire the
 977  * application identifier as a unique bus name on the session bus using
 978  * GDBus.
 979  *
 980  * Due to the internal architecture of GDBus, method calls can be
 981  * dispatched at any time (even if a main loop is not running).  For
 982  * this reason, you must ensure that any object paths that you wish to
 983  * register are registered before calling this function.
 984  *
 985  * If the application has already been registered then %TRUE is
 986  * returned with no work performed.
 987  *
 988  * The #GApplication::startup signal is emitted if registration succeeds
 989  * and @application is the primary instance.
 990  *
 991  * In the event of an error (such as @cancellable being cancelled, or a
 992  * failure to connect to the session bus), %FALSE is returned and @error
 993  * is set appropriately.
 994  *
 995  * Note: the return value of this function is not an indicator that this
 996  * instance is or is not the primary instance of the application.  See
 997  * g_application_get_is_remote() for that.
 998  *
 999  * Since: 2.28
1000  **/
1001 gboolean
1002 g_application_register (GApplication  *application,
1003                         GCancellable  *cancellable,
1004                         GError       **error)
1005 {
1006   g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
1007
1008   if (!application->priv->is_registered)
1009     {
1010       if (~application->priv->flags & G_APPLICATION_NON_UNIQUE)
1011         {
1012           application->priv->impl =
1013             g_application_impl_register (application, application->priv->id,
1014                                          application->priv->flags,
1015                                          &application->priv->remote_actions,
1016                                          cancellable, error);
1017
1018           if (application->priv->impl == NULL)
1019             return FALSE;
1020         }
1021
1022       application->priv->is_remote = application->priv->remote_actions != NULL;
1023       application->priv->is_registered = TRUE;
1024
1025       g_object_notify (G_OBJECT (application), "is-registered");
1026
1027       if (!application->priv->is_remote)
1028         g_signal_emit (application, g_application_signals[SIGNAL_STARTUP], 0);
1029     }
1030
1031   return TRUE;
1032 }
1033
1034 /* Hold/release {{{1 */
1035 /**
1036  * g_application_hold:
1037  * @application: a #GApplication
1038  *
1039  * Increases the use count of @application.
1040  *
1041  * Use this function to indicate that the application has a reason to
1042  * continue to run.  For example, g_application_hold() is called by GTK+
1043  * when a toplevel window is on the screen.
1044  *
1045  * To cancel the hold, call g_application_release().
1046  **/
1047 void
1048 g_application_hold (GApplication *application)
1049 {
1050   if (application->priv->inactivity_timeout_id)
1051     {
1052       g_source_remove (application->priv->inactivity_timeout_id);
1053       application->priv->inactivity_timeout_id = 0;
1054     }
1055
1056   application->priv->use_count++;
1057 }
1058
1059 static gboolean
1060 inactivity_timeout_expired (gpointer data)
1061 {
1062   GApplication *application = G_APPLICATION (data);
1063
1064   G_APPLICATION_GET_CLASS (application)
1065     ->quit_mainloop (application);
1066
1067   return FALSE;
1068 }
1069
1070
1071 /**
1072  * g_application_release:
1073  * @application: a #GApplication
1074  *
1075  * Decrease the use count of @application.
1076  *
1077  * When the use count reaches zero, the application will stop running.
1078  *
1079  * Never call this function except to cancel the effect of a previous
1080  * call to g_application_hold().
1081  **/
1082 void
1083 g_application_release (GApplication *application)
1084 {
1085   application->priv->use_count--;
1086
1087   if (application->priv->use_count == 0)
1088     {
1089       if (application->priv->inactivity_timeout)
1090         application->priv->inactivity_timeout_id =
1091           g_timeout_add (application->priv->inactivity_timeout,
1092                          inactivity_timeout_expired, application);
1093
1094       else
1095         G_APPLICATION_GET_CLASS (application)
1096           ->quit_mainloop (application);
1097     }
1098 }
1099
1100 /* Activate, Open {{{1 */
1101 /**
1102  * g_application_activate:
1103  * @application: a #GApplication
1104  *
1105  * Activates the application.
1106  *
1107  * In essence, this results in the #GApplication::activate() signal being
1108  * emitted in the primary instance.
1109  *
1110  * The application must be registered before calling this function.
1111  *
1112  * Since: 2.28
1113  **/
1114 void
1115 g_application_activate (GApplication *application)
1116 {
1117   g_return_if_fail (G_IS_APPLICATION (application));
1118   g_return_if_fail (application->priv->is_registered);
1119
1120   if (application->priv->is_remote)
1121     g_application_impl_activate (application->priv->impl,
1122                                  get_platform_data (application));
1123
1124   else
1125     g_signal_emit (application, g_application_signals[SIGNAL_ACTIVATE], 0);
1126 }
1127
1128 /**
1129  * g_application_open:
1130  * @application: a #GApplication
1131  * @files: (array length=n_files): an array of #GFiles to open
1132  * @n_files: the length of the @files array
1133  * @hint: a hint (or ""), but never %NULL
1134  *
1135  * Opens the given files.
1136  *
1137  * In essence, this results in the #GApplication::open signal being emitted
1138  * in the primary instance.
1139  *
1140  * @n_files must be greater than zero.
1141  *
1142  * @hint is simply passed through to the ::open signal.  It is
1143  * intended to be used by applications that have multiple modes for
1144  * opening files (eg: "view" vs "edit", etc).  Unless you have a need
1145  * for this functionality, you should use "".
1146  *
1147  * The application must be registered before calling this function
1148  * and it must have the %G_APPLICATION_HANDLES_OPEN flag set.
1149  *
1150  * Since: 2.28
1151  **/
1152 void
1153 g_application_open (GApplication  *application,
1154                     GFile        **files,
1155                     gint           n_files,
1156                     const gchar   *hint)
1157 {
1158   g_return_if_fail (G_IS_APPLICATION (application));
1159   g_return_if_fail (application->priv->flags &
1160                     G_APPLICATION_HANDLES_OPEN);
1161   g_return_if_fail (application->priv->is_registered);
1162
1163   if (application->priv->is_remote)
1164     g_application_impl_open (application->priv->impl,
1165                              files, n_files, hint,
1166                              get_platform_data (application));
1167
1168   else
1169     g_signal_emit (application, g_application_signals[SIGNAL_OPEN],
1170                    0, files, n_files, hint);
1171 }
1172
1173 /* Run {{{1 */
1174 /**
1175  * g_application_run:
1176  * @application: a #GApplication
1177  * @argc: the argc from main() (or 0 if @argv is %NULL)
1178  * @argv: (array length=argc) (allow-none): the argv from main(), or %NULL
1179  * @returns: the exit status
1180  *
1181  * Runs the application.
1182  *
1183  * This function is intended to be run from main() and its return value
1184  * is intended to be returned by main(). Although you are expected to pass
1185  * the @argc, @argv parameters from main() to this function, it is possible
1186  * to pass %NULL if @argv is not available or commandline handling is not
1187  * required.
1188  *
1189  * First, the local_command_line() virtual function is invoked.
1190  * This function always runs on the local instance. It gets passed a pointer
1191  * to a %NULL-terminated copy of @argv and is expected to remove the arguments
1192  * that it handled (shifting up remaining arguments). See
1193  * <xref linkend="gapplication-example-cmdline2"/> for an example of
1194  * parsing @argv manually. Alternatively, you may use the #GOptionContext API,
1195  * after setting <literal>argc = g_strv_length (argv);</literal>.
1196  *
1197  * The last argument to local_command_line() is a pointer to the @status
1198  * variable which can used to set the exit status that is returned from
1199  * g_application_run().
1200  *
1201  * If local_command_line() returns %TRUE, the command line is expected
1202  * to be completely handled, including possibly registering as the primary
1203  * instance, calling g_application_activate() or g_application_open(), etc.
1204  *
1205  * If local_command_line() returns %FALSE then the application is registered
1206  * and the #GApplication::command-line signal is emitted in the primary
1207  * instance (which may or may not be this instance). The signal handler
1208  * gets passed a #GApplicationCommandline object that (among other things)
1209  * contains the remaining commandline arguments that have not been handled
1210  * by local_command_line().
1211  *
1212  * If the application has the %G_APPLICATION_HANDLES_COMMAND_LINE
1213  * flag set then the default implementation of local_command_line()
1214  * always returns %FALSE immediately, resulting in the commandline
1215  * always being handled in the primary instance.
1216  *
1217  * Otherwise, the default implementation of local_command_line() tries
1218  * to do a couple of things that are probably reasonable for most
1219  * applications.  First, g_application_register() is called to attempt
1220  * to register the application.  If that works, then the command line
1221  * arguments are inspected.  If no commandline arguments are given, then
1222  * g_application_activate() is called.  If commandline arguments are
1223  * given and the %G_APPLICATION_HANDLES_OPEN flag is set then they
1224  * are assumed to be filenames and g_application_open() is called.
1225  *
1226  * If you need to handle commandline arguments that are not filenames,
1227  * and you don't mind commandline handling to happen in the primary
1228  * instance, you should set %G_APPLICATION_HANDLED_COMMAND_LINE and
1229  * process the commandline arguments in your #GApplication::command-line
1230  * signal handler, either manually or using the #GOptionContext API.
1231  *
1232  * If you are interested in doing more complicated local handling of the
1233  * commandline then you should implement your own #GApplication subclass
1234  * and override local_command_line(). In this case, you most likely want
1235  * to return %TRUE from your local_command_line() implementation to
1236  * suppress the default handling. See
1237  * <xref linkend="gapplication-example-cmdline2"/> for an example.
1238  *
1239  * If, after the above is done, the use count of the application is zero
1240  * then the exit status is returned immediately.  If the use count is
1241  * non-zero then the mainloop is run until the use count falls to zero,
1242  * at which point 0 is returned.
1243  *
1244  * If the %G_APPLICATION_IS_SERVICE flag is set, then the exiting at
1245  * use count of zero is delayed for a while (ie: the instance stays
1246  * around to provide its <emphasis>service</emphasis> to others).
1247  *
1248  * Since: 2.28
1249  **/
1250 int
1251 g_application_run (GApplication  *application,
1252                    int            argc,
1253                    char         **argv)
1254 {
1255   gchar **arguments;
1256   int status;
1257   gint i;
1258
1259   g_return_val_if_fail (G_IS_APPLICATION (application), 1);
1260   g_return_val_if_fail (argc == 0 || argv != NULL, 1);
1261
1262   arguments = g_new (gchar *, argc + 1);
1263   for (i = 0; i < argc; i++)
1264     arguments[i] = g_strdup (argv[i]);
1265   arguments[i] = NULL;
1266
1267   if (g_get_prgname () == NULL && argc > 0)
1268     {
1269       gchar *prgname;
1270
1271       prgname = g_path_get_basename (argv[0]);
1272       g_set_prgname (prgname);
1273       g_free (prgname);
1274     }
1275
1276   if (!G_APPLICATION_GET_CLASS (application)
1277         ->local_command_line (application, &arguments, &status))
1278     {
1279       GError *error = NULL;
1280
1281       if (!g_application_register (application, NULL, &error))
1282         {
1283           g_printerr ("%s", error->message);
1284           g_error_free (error);
1285           return 1;
1286         }
1287
1288       if (application->priv->is_remote)
1289         {
1290           GVariant *platform_data;
1291
1292           platform_data = get_platform_data (application);
1293           status = g_application_impl_command_line (application->priv->impl,
1294                                                     arguments, platform_data);
1295         }
1296       else
1297         {
1298           GApplicationCommandLine *cmdline;
1299           GVariant *v;
1300
1301           v = g_variant_new_bytestring_array ((const gchar **) arguments, -1);
1302           cmdline = g_object_new (G_TYPE_APPLICATION_COMMAND_LINE,
1303                                   "arguments", v, NULL);
1304           g_signal_emit (application,
1305                          g_application_signals[SIGNAL_COMMAND_LINE],
1306                          0, cmdline, &status);
1307           g_object_unref (cmdline);
1308         }
1309     }
1310
1311   g_strfreev (arguments);
1312
1313   if (application->priv->flags & G_APPLICATION_IS_SERVICE &&
1314       application->priv->is_registered &&
1315       !application->priv->use_count &&
1316       !application->priv->inactivity_timeout_id)
1317     {
1318       application->priv->inactivity_timeout_id =
1319         g_timeout_add (10000, inactivity_timeout_expired, application);
1320     }
1321
1322   if (application->priv->use_count ||
1323       application->priv->inactivity_timeout_id)
1324     {
1325       G_APPLICATION_GET_CLASS (application)
1326         ->run_mainloop (application);
1327       status = 0;
1328     }
1329
1330   if (application->priv->impl)
1331     g_application_impl_flush (application->priv->impl);
1332
1333   g_settings_sync ();
1334
1335   return status;
1336 }
1337
1338 static gboolean
1339 g_application_has_action (GActionGroup *action_group,
1340                           const gchar  *action_name)
1341 {
1342   GApplication *application = G_APPLICATION (action_group);
1343
1344   g_return_val_if_fail (application->priv->is_registered, FALSE);
1345
1346   if (application->priv->remote_actions != NULL)
1347     return g_hash_table_lookup (application->priv->remote_actions,
1348                                 action_name) != NULL;
1349
1350   return application->priv->actions &&
1351          g_action_group_has_action (application->priv->actions, action_name);
1352 }
1353
1354 static gchar **
1355 g_application_list_actions (GActionGroup *action_group)
1356 {
1357   GApplication *application = G_APPLICATION (action_group);
1358
1359   g_return_val_if_fail (application->priv->is_registered, NULL);
1360
1361   if (application->priv->remote_actions != NULL)
1362     {
1363       GHashTableIter iter;
1364       gint n, i = 0;
1365       gchar **keys;
1366       gpointer key;
1367
1368       n = g_hash_table_size (application->priv->remote_actions);
1369       keys = g_new (gchar *, n + 1);
1370
1371       g_hash_table_iter_init (&iter, application->priv->remote_actions);
1372       while (g_hash_table_iter_next (&iter, &key, NULL))
1373         keys[i++] = g_strdup (key);
1374       g_assert_cmpint (i, ==, n);
1375       keys[n] = NULL;
1376
1377       return keys;
1378     }
1379
1380   else if (application->priv->actions != NULL)
1381     return g_action_group_list_actions (application->priv->actions);
1382
1383   else
1384     /* empty string array */
1385     return g_new0 (gchar *, 1);
1386 }
1387
1388 static gboolean
1389 g_application_get_action_enabled (GActionGroup *action_group,
1390                                   const gchar  *action_name)
1391 {
1392   GApplication *application = G_APPLICATION (action_group);
1393
1394   g_return_val_if_fail (application->priv->remote_actions != NULL ||
1395                         application->priv->actions != NULL, FALSE);
1396   g_return_val_if_fail (application->priv->is_registered, FALSE);
1397
1398   if (application->priv->remote_actions)
1399     {
1400       RemoteActionInfo *info;
1401
1402       info = g_hash_table_lookup (application->priv->remote_actions,
1403                                   action_name);
1404
1405       return info && info->enabled;
1406     }
1407
1408   return g_action_group_get_action_enabled (application->priv->actions,
1409                                             action_name);
1410 }
1411
1412 static const GVariantType *
1413 g_application_get_action_parameter_type (GActionGroup *action_group,
1414                                          const gchar  *action_name)
1415 {
1416   GApplication *application = G_APPLICATION (action_group);
1417
1418   g_return_val_if_fail (application->priv->remote_actions != NULL ||
1419                         application->priv->actions != NULL, NULL);
1420   g_return_val_if_fail (application->priv->is_registered, NULL);
1421
1422   if (application->priv->remote_actions)
1423     {
1424       RemoteActionInfo *info;
1425
1426       info = g_hash_table_lookup (application->priv->remote_actions,
1427                                   action_name);
1428
1429       if (info)
1430         return info->parameter_type;
1431       else
1432         return NULL;
1433     }
1434
1435   return g_action_group_get_action_parameter_type (application->priv->actions,
1436                                                    action_name);
1437 }
1438
1439 static const GVariantType *
1440 g_application_get_action_state_type (GActionGroup *action_group,
1441                                      const gchar  *action_name)
1442 {
1443   GApplication *application = G_APPLICATION (action_group);
1444
1445   g_return_val_if_fail (application->priv->remote_actions != NULL ||
1446                         application->priv->actions != NULL, NULL);
1447   g_return_val_if_fail (application->priv->is_registered, NULL);
1448
1449   if (application->priv->remote_actions)
1450     {
1451       RemoteActionInfo *info;
1452
1453       info = g_hash_table_lookup (application->priv->remote_actions,
1454                                   action_name);
1455
1456       if (info && info->state)
1457         return g_variant_get_type (info->state);
1458       else
1459         return NULL;
1460     }
1461
1462   return g_action_group_get_action_state_type (application->priv->actions,
1463                                                action_name);
1464 }
1465
1466 static GVariant *
1467 g_application_get_action_state (GActionGroup *action_group,
1468                                 const gchar  *action_name)
1469 {
1470   GApplication *application = G_APPLICATION (action_group);
1471
1472   g_return_val_if_fail (application->priv->remote_actions != NULL ||
1473                         application->priv->actions != NULL, NULL);
1474   g_return_val_if_fail (application->priv->is_registered, NULL);
1475
1476   if (application->priv->remote_actions)
1477     {
1478       RemoteActionInfo *info;
1479
1480       info = g_hash_table_lookup (application->priv->remote_actions,
1481                                   action_name);
1482
1483       if (info && info->state)
1484         return g_variant_ref (info->state);
1485       else
1486         return NULL;
1487     }
1488
1489   return g_action_group_get_action_state (application->priv->actions,
1490                                           action_name);
1491 }
1492
1493 static void
1494 g_application_change_action_state (GActionGroup *action_group,
1495                                    const gchar  *action_name,
1496                                    GVariant     *value)
1497 {
1498   GApplication *application = G_APPLICATION (action_group);
1499
1500   g_return_if_fail (application->priv->is_remote ||
1501                     application->priv->actions != NULL);
1502   g_return_if_fail (application->priv->is_registered);
1503
1504   if (application->priv->is_remote)
1505     g_application_impl_change_action_state (application->priv->impl,
1506                                             action_name, value,
1507                                             get_platform_data (application));
1508
1509   else
1510     g_action_group_change_action_state (application->priv->actions,
1511                                         action_name, value);
1512 }
1513
1514 static void
1515 g_application_activate_action (GActionGroup *action_group,
1516                                const gchar  *action_name,
1517                                GVariant     *parameter)
1518 {
1519   GApplication *application = G_APPLICATION (action_group);
1520
1521   g_return_if_fail (application->priv->is_remote ||
1522                     application->priv->actions != NULL);
1523   g_return_if_fail (application->priv->is_registered);
1524
1525   if (application->priv->is_remote)
1526     g_application_impl_activate_action (application->priv->impl,
1527                                         action_name, parameter,
1528                                         get_platform_data (application));
1529
1530   else
1531     g_action_group_activate_action (application->priv->actions,
1532                                     action_name, parameter);
1533 }
1534
1535 static void
1536 g_application_action_group_iface_init (GActionGroupInterface *iface)
1537 {
1538   iface->has_action = g_application_has_action;
1539   iface->list_actions = g_application_list_actions;
1540
1541   iface->get_action_enabled = g_application_get_action_enabled;
1542   iface->get_action_parameter_type = g_application_get_action_parameter_type;
1543   iface->get_action_state_type = g_application_get_action_state_type;
1544   iface->get_action_state = g_application_get_action_state;
1545   iface->change_action_state = g_application_change_action_state;
1546   iface->activate_action = g_application_activate_action;
1547 }
1548
1549 /* Epilogue {{{1 */
1550 /* vim:set foldmethod=marker: */