gio/gapplication.c

   1 /* GIO - GLib Input, Output and Streaming Library
   2  *
   3  * Copyright © 2010 Red Hat, Inc
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  *
  20  * Authors: Colin Walters <walters@verbum.org>
  21  *          Emmanuele Bassi <ebassi@linux.intel.com>
  22  */
  23
  24 #include "config.h"
  25
  26 #include <string.h>
  27 #include <stdlib.h>
  28
  29 #include <gobject/gvaluecollector.h>
  30
  31 #include "gapplication.h"
  32 #include "gio-marshal.h"
  33 #include "glibintl.h"
  34
  35 #include "gioerror.h"
  36
  37 #include "gdbusconnection.h"
  38 #include "gdbusintrospection.h"
  39 #include "gdbusmethodinvocation.h"
  40
  41 #include "gioalias.h"
  42
  43 /**
  44  * SECTION: gapplication
  45  * @title: GApplication
  46  * @short_description: Core application class
  47  *
  48  * A #GApplication is the foundation of an application, unique for
  49  * a given application identifier.  The #GApplication wraps some
  50  * low-level platform-specific services; it's expected that most
  51  * software will use a higher-level application class such as
  52  * #GtkApplication or #MxApplication.
  53  *
  54  * In addition to single-instance-ness, #GApplication provides support
  55  * for 'actions', which can be presented to the user in a platform-specific
  56  * way (e.g. Windows 7 jump lists). Note that these are just simple actions
  57  * without parameters. For more flexible scriptability, implementing a
  58  * a separate D-Bus interface is recommended, see e.g.
  59  * <xref linkend="gdbus-convenience"/>.
  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 convenience, the restrictions on application identifiers are reproduced
  66  * here:
  67  * <itemizedlist>
  68  *   <listitem>Application identifiers must contain only the ASCII characters "[A-Z][a-z][0-9]_-" and must not begin with a digit.</listitem>
  69  *   <listitem>Application identifiers must contain at least one '.' (period) character (and thus at least two elements).</listitem>
  70  *   <listitem>Application identifiers must not begin with a '.' (period) character.</listitem>
  71  *   <listitem>Application identifiers must not exceed 255 characters.</listitem>
  72  * </itemizedlist>
  73  *
  74  * <refsect2><title>D-Bus implementation</title>
  75  * <para>
  76  * On UNIX systems using D-Bus, #GApplication is implemented by claiming the
  77  * application identifier as a bus name on the session bus. The implementation
  78  * exports an object at the object path that is created by replacing '.' with
  79  * '/' in the application identifier (e.g. the object path for the
  80  * application id 'org.gtk.TestApp' is '/org/gtk/TestApp'). The object
  81  * implements the org.gtk.Application interface.
  82  * </para>
  83  * <classsynopsis class="interface">
  84  *   <ooclass><interfacename>org.gtk.Application</interfacename></ooclass>
  85  *   <methodsynopsis>
  86  *     <void/>
  87  *     <methodname>Activate</methodname>
  88  *     <methodparam><modifier>in</modifier><type>aay</type><parameter>arguments</parameter></methodparam>
  89  *     <methodparam><modifier>in</modifier><type>a{sv}</type><parameter>data</parameter></methodparam>
  90  *   </methodsynopsis>
  91  *   <methodsynopsis>
  92  *     <void/>
  93  *     <methodname>InvokeAction</methodname>
  94  *     <methodparam><modifier>in</modifier><type>s</type><parameter>action</parameter></methodparam>
  95  *     <methodparam><modifier>in</modifier><type>u</type><parameter>timestamp</parameter></methodparam>
  96  *   </methodsynopsis>
  97  *   <methodsynopsis>
  98  *     <type>a{s(sb)}</type>
  99  *     <methodname>ListActions</methodname>
 100  *     <void/>
 101  *   </methodsynopsis>
 102  *   <methodsynopsis>
 103  *     <void/>
 104  *     <methodname>Quit</methodname>
 105  *     <methodparam><modifier>in</modifier><type>u</type><parameter>timestamp</parameter></methodparam>
 106  *   </methodsynopsis>
 107  *   <methodsynopsis>
 108  *     <modifier>Signal</modifier>
 109  *     <void/>
 110  *     <methodname>ActionsChanged</methodname>
 111  *     <void/>
 112  *   </methodsynopsis>
 113  * </classsynopsis>
 114  * <para>
 115  * The <methodname>Activate</methodname> function is called on the existing
 116  * application instance when a second instance fails to take the bus name.
 117  * @arguments contains the commandline arguments given to the second instance
 118  * and @data contains platform-specific additional data, see
 119  * g_application_format_activation_data().
 120  * </para>
 121  * <para>
 122  * The <methodname>InvokeAction</methodname> function can be called to invoke
 123  * one of the actions exported by the application. The @timestamp parameter
 124  * should be taken from the user event that triggered the method call (e.g.
 125  * a button press event).
 126  * </para>
 127  * <para>
 128  * The <methodname>ListActions</methodname> function returns a dictionary
 129  * with the exported actions of the application. The keys of the dictionary
 130  * are the action names, and the values are structs containing the description
 131  * for the action and a boolean that represents if the action is enabled or not.
 132  * </para>
 133  * <para>
 134  * The <methodname>Quit</methodname> function can be called to terminate
 135  * the application. The @timestamp parameter should be taken from the user
 136  * event that triggered the method call (e.g. a button press event).
 137  * </para>
 138  * <para>
 139  * The <methodname>ActionsChanged</methodname> signal is emitted when the
 140  * exported actions change (i.e. an action is added, removed, enabled,
 141  * disabled, or otherwise changed).
 142  * </para>
 143  * <para>
 144  * #GApplication is supported since Gio 2.26.
 145  * </para>
 146  * </refsect2>
 147  */
 148
 149 G_DEFINE_TYPE (GApplication, g_application, G_TYPE_OBJECT);
 150
 151 enum
 152 {
 153   PROP_0,
 154
 155   PROP_APPID,
 156   PROP_DEFAULT_QUIT,
 157   PROP_IS_REMOTE
 158 };
 159
 160 enum
 161 {
 162   QUIT,
 163   ACTION,
 164   PREPARE_ACTIVATION,
 165
 166   LAST_SIGNAL
 167 };
 168
 169 static guint application_signals[LAST_SIGNAL] = { 0 };
 170
 171 typedef struct {
 172   gchar *name;
 173   gchar *description;
 174   guint enabled : 1;
 175 } GApplicationAction;
 176
 177 struct _GApplicationPrivate
 178 {
 179   gchar *appid;
 180   GHashTable *actions; /* name -> GApplicationAction */
 181   GMainLoop *mainloop;
 182
 183   guint default_quit : 1;
 184   guint is_remote    : 1;
 185
 186   guint actions_changed_id;
 187
 188 #ifdef G_OS_UNIX
 189   gchar *dbus_path;
 190   GDBusConnection *session_bus;
 191 #endif
 192 };
 193
 194 static GApplication *primary_application = NULL;
 195 static GHashTable *instances_for_appid = NULL;
 196
 197 static void     _g_application_platform_init                    (GApplication  *app);
 198 static gboolean _g_application_platform_acquire_single_instance (GApplication  *app,
 199                                                                  GError       **error);
 200 static void     _g_application_platform_remote_invoke_action    (GApplication  *app,
 201                                                                  const gchar   *action,
 202                                                                  guint          timestamp);
 203 static void     _g_application_platform_remote_quit             (GApplication  *app,
 204                                                                  guint          timestamp);
 205 static void     _g_application_platform_activate                (GApplication  *app,
 206                                                                  GVariant      *data) G_GNUC_NORETURN;
 207 static void     _g_application_platform_on_actions_changed      (GApplication  *app);
 208
 209 #ifdef G_OS_UNIX
 210 #include "gdbusapplication.c"
 211 #else
 212 #include "gnullapplication.c"
 213 #endif
 214
 215 static gboolean
 216 _g_application_validate_id (const char *id)
 217 {
 218   gboolean allow_dot;
 219
 220   if (strlen (id) > 255)
 221     return FALSE;
 222
 223   if (!g_ascii_isalpha (*id))
 224     return FALSE;
 225
 226   id++;
 227   allow_dot = FALSE;
 228   for (; *id; id++)
 229     {
 230       if (g_ascii_isalnum (*id) || (*id == '-') || (*id == '_'))
 231         allow_dot = TRUE;
 232       else if (allow_dot && *id == '.')
 233         allow_dot = FALSE;
 234       else
 235         return FALSE;
 236     }
 237   return TRUE;
 238 }
 239
 240 static gpointer
 241 init_appid_statics (gpointer data)
 242 {
 243   instances_for_appid = g_hash_table_new (g_str_hash, g_str_equal);
 244   return NULL;
 245 }
 246
 247 static GApplication *
 248 application_for_appid (const char *appid)
 249 {
 250   static GOnce appid_once = G_ONCE_INIT;
 251
 252   g_once (&appid_once, init_appid_statics, NULL);
 253
 254   return g_hash_table_lookup (instances_for_appid, appid);
 255 }
 256
 257 static gboolean
 258 g_application_default_quit (GApplication *application,
 259                             guint         timestamp)
 260 {
 261   g_return_val_if_fail (application->priv->mainloop != NULL, FALSE);
 262   g_main_loop_quit (application->priv->mainloop);
 263
 264   return TRUE;
 265 }
 266
 267 static void
 268 g_application_default_run (GApplication *application)
 269 {
 270   if (application->priv->mainloop == NULL)
 271     application->priv->mainloop = g_main_loop_new (NULL, TRUE);
 272
 273   g_main_loop_run (application->priv->mainloop);
 274 }
 275
 276 static void
 277 _g_application_handle_activation (GApplication  *app,
 278                                   int            argc,
 279                                   char         **argv,
 280                                   GVariant      *platform_data)
 281 {
 282   GVariantBuilder builder;
 283   GVariant *message;
 284   int i;
 285
 286   g_variant_builder_init (&builder, G_VARIANT_TYPE ("(aaya{sv})"));
 287   g_variant_builder_open (&builder, G_VARIANT_TYPE ("aay"));
 288
 289   for (i = 1; i < argc; i++)
 290     {
 291       int j;
 292       guint8 *argv_bytes;
 293
 294       g_variant_builder_open (&builder, G_VARIANT_TYPE ("ay"));
 295
 296       argv_bytes = (guint8*) argv[i];
 297       for (j = 0; argv_bytes[j]; j++)
 298         g_variant_builder_add_value (&builder,
 299                                      g_variant_new_byte (argv_bytes[j]));
 300       g_variant_builder_close (&builder);
 301     }
 302   g_variant_builder_close (&builder);
 303
 304   if (platform_data)
 305     g_variant_builder_add (&builder, "@a{sv}", platform_data);
 306   else
 307     {
 308       g_variant_builder_open (&builder, G_VARIANT_TYPE ("a{sv}"));
 309       g_variant_builder_close (&builder);
 310     }
 311
 312   message = g_variant_builder_end (&builder);
 313   _g_application_platform_activate (app, message);
 314   g_variant_unref (message);
 315 }
 316
 317 static gboolean
 318 timeout_handle_actions_changed (gpointer user_data)
 319 {
 320   GApplication *application = user_data;
 321
 322   application->priv->actions_changed_id = 0;
 323
 324   _g_application_platform_on_actions_changed (application);
 325
 326   return FALSE;
 327 }
 328
 329 static inline void
 330 queue_actions_change_notification (GApplication *application)
 331 {
 332   GApplicationPrivate *priv = application->priv;
 333
 334   if (priv->actions_changed_id == 0)
 335     priv->actions_changed_id = g_timeout_add (0, timeout_handle_actions_changed, application);
 336 }
 337
 338 static void
 339 g_application_action_free (gpointer data)
 340 {
 341   if (G_LIKELY (data != NULL))
 342     {
 343       GApplicationAction *action = data;
 344
 345       g_free (action->name);
 346       g_free (action->description);
 347
 348       g_slice_free (GApplicationAction, action);
 349     }
 350 }
 351
 352
 353 /**
 354  * g_application_new:
 355  * @appid: System-dependent application identifier
 356  *
 357  * Create a new #GApplication.  The application is initially in
 358  * "remote" mode.  Almost certainly, you want to call
 359  * g_application_register() immediately after this function, which
 360  * will finish initialization.
 361  *
 362  * As a convenience, this function is defined to call g_type_init() as
 363  * its very first action.
 364  *
 365  * Returns: (transfer full): An application instance
 366  *
 367  * Since: 2.26
 368  */
 369 GApplication *
 370 g_application_new (const gchar *appid)
 371 {
 372   g_type_init ();
 373
 374   return G_APPLICATION (g_object_new (G_TYPE_APPLICATION, "appid", appid, NULL));
 375 }
 376
 377 /**
 378  * g_application_register:
 379  * @application: A #GApplication
 380  * @argc: System argument count
 381  * @argv: (array length=argc): System argument vector
 382  * @platform_data: (allow-none): Arbitrary platform-specific data, must have signature "a{sv}"
 383  *
 384  * Ensure the current process is the unique owner of the application.
 385  * If successful, the #GApplication:is-remote property will be changed
 386  * to %FALSE, and it is safe to continue creating other resources
 387  * such as graphics windows.
 388  *
 389  * If the given @appid is already running in another process, the
 390  * #GApplication:default-exit property will be evaluated.  If it's
 391  * %TRUE, then a platform-specific action such as bringing any
 392  * graphics windows associated with the application to the foreground
 393  * may be initiated.  After that, the current process will terminate.
 394  * If %FALSE, then the application remains in the #GApplication:is-remote
 395  * state, and you can e.g. call g_application_invoke_action().
 396  */
 397 void
 398 g_application_register_with_data (GApplication  *application,
 399                                   gint           argc,
 400                                   gchar        **argv,
 401                                   GVariant      *platform_data)
 402 {
 403   g_return_if_fail (application->priv->appid != NULL);
 404   g_return_if_fail (application->priv->is_remote);
 405   g_return_if_fail (platform_data == NULL
 406                     || strcmp (g_variant_get_type_string (platform_data), "a{sv}") == 0);
 407
 408   if (!_g_application_platform_acquire_single_instance (application, NULL))
 409     {
 410       if (application->priv->default_quit)
 411         _g_application_handle_activation (application, argc, argv, platform_data);
 412       else
 413         return;
 414     }
 415
 416   application->priv->is_remote = FALSE;
 417
 418   _g_application_platform_init (application);
 419 }
 420
 421 /**
 422  * g_application_new_and_register:
 423  * @appid: An application identifier
 424  * @argc: System argument count
 425  * @argv: (array length=argc): System argument vector
 426  *
 427  * This is a convenience function which combines g_application_new()
 428  * with g_application_register_with_data().
 429  */
 430 GApplication *
 431 g_application_new_and_register (const gchar  *appid,
 432                                 gint          argc,
 433                                 gchar       **argv)
 434 {
 435   GApplication *app = g_application_new (appid);
 436   g_application_register_with_data (app, argc, argv, NULL);
 437   return app;
 438 }
 439
 440 /**
 441  * g_application_add_action:
 442  * @application: a #GApplication
 443  * @name: the action name
 444  * @description: the action description; can be a translatable
 445  *   string
 446  *
 447  * Adds an action @name to the list of exported actions of @application.
 448  *
 449  * It is an error to call this function if @application is a proxy for
 450  * a remote application.
 451  *
 452  * You can invoke an action using g_application_invoke_action().
 453  *
 454  * The newly added action is enabled by default; you can call
 455  * g_application_set_action_enabled() to disable it.
 456  *
 457  * Since: 2.26
 458  */
 459 void
 460 g_application_add_action (GApplication *application,
 461                           const gchar  *name,
 462                           const gchar  *description)
 463 {
 464   GApplicationPrivate *priv;
 465   GApplicationAction *action;
 466
 467   g_return_if_fail (G_IS_APPLICATION (application));
 468   g_return_if_fail (name != NULL && *name != '\0');
 469   g_return_if_fail (!application->priv->is_remote);
 470
 471   priv = application->priv;
 472
 473   g_return_if_fail (g_hash_table_lookup (priv->actions, name) == NULL);
 474
 475   action = g_slice_new (GApplicationAction);
 476   action->name = g_strdup (name);
 477   action->description = g_strdup (description);
 478   action->enabled = TRUE;
 479
 480   g_hash_table_insert (priv->actions, action->name, action);
 481   queue_actions_change_notification (application);
 482 }
 483
 484 /**
 485  * g_application_remove_action:
 486  * @application: a #GApplication
 487  * @name: the name of the action to remove
 488  *
 489  * Removes the action @name from the list of exported actions of @application.
 490  *
 491  * It is an error to call this function if @application is a proxy for
 492  * a remote application.
 493  *
 494  * Since: 2.26
 495  */
 496 void
 497 g_application_remove_action (GApplication *application,
 498                              const gchar  *name)
 499 {
 500   GApplicationPrivate *priv;
 501
 502   g_return_if_fail (G_IS_APPLICATION (application));
 503   g_return_if_fail (name != NULL && *name != '\0');
 504   g_return_if_fail (!application->priv->is_remote);
 505
 506   priv = application->priv;
 507
 508   g_return_if_fail (g_hash_table_lookup (priv->actions, name) != NULL);
 509
 510   g_hash_table_remove (priv->actions, name);
 511   queue_actions_change_notification (application);
 512 }
 513
 514 /**
 515  * g_application_invoke_action:
 516  * @application: a #GApplication
 517  * @name: the name of the action to invoke
 518  * @timestamp: the timestamp that is going to be passed to
 519  *   the #GApplication::action signal
 520  *
 521  * Invokes the action @name of the passed #GApplication.
 522  *
 523  * This function has different behavior depending on whether @application
 524  * is acting as a proxy for another process.  In the normal case where
 525  * the current process is hosting the application, and the specified
 526  * action exists and is enabled, the #GApplication::action signal will
 527  * be emitted.
 528  *
 529  * If @application is a proxy, then the specified action will be invoked
 530  * in the remote process. It is not necessary to call
 531  * g_application_add_action() in the current process in order to invoke
 532  * one remotely.
 533  *
 534  * Since: 2.26
 535  */
 536 void
 537 g_application_invoke_action (GApplication *application,
 538                              const gchar  *name,
 539                              guint         timestamp)
 540 {
 541   GApplicationPrivate *priv;
 542   GApplicationAction *action;
 543
 544   g_return_if_fail (G_IS_APPLICATION (application));
 545   g_return_if_fail (name != NULL);
 546
 547   priv = application->priv;
 548
 549   if (priv->is_remote)
 550     {
 551       _g_application_platform_remote_invoke_action (application, name, timestamp);
 552       return;
 553     }
 554
 555   action = g_hash_table_lookup (priv->actions, name);
 556   g_return_if_fail (action != NULL);
 557   if (!action->enabled)
 558     return;
 559
 560   g_signal_emit (application, application_signals[ACTION],
 561                  g_quark_from_string (name),
 562                  name,
 563                  timestamp);
 564 }
 565
 566 /**
 567  * g_application_list_actions:
 568  * @application: a #GApplication
 569  *
 570  * Retrieves the list of action names currently exported by @application.
 571  *
 572  * It is an error to call this function if @application is a proxy for
 573  * a remote application.
 574  *
 575  * Return value: (transfer full): a newly allocation, %NULL-terminated array
 576  *   of strings containing action names; use g_strfreev() to free the
 577  *   resources used by the returned array
 578  *
 579  * Since: 2.26
 580  */
 581 gchar **
 582 g_application_list_actions (GApplication *application)
 583 {
 584   GApplicationPrivate *priv;
 585   GHashTableIter iter;
 586   gpointer key;
 587   gchar **retval;
 588   gint i;
 589
 590   g_return_val_if_fail (G_IS_APPLICATION (application), NULL);
 591   g_return_val_if_fail (!application->priv->is_remote, NULL);
 592
 593   priv = application->priv;
 594
 595   retval = g_new (gchar*, g_hash_table_size (priv->actions));
 596
 597   i = 0;
 598   g_hash_table_iter_init (&iter, priv->actions);
 599   while (g_hash_table_iter_next (&iter, &key, NULL))
 600     retval[i++] = g_strdup (key);
 601
 602   retval[i] = NULL;
 603
 604   return retval;
 605 }
 606
 607 /**
 608  * g_application_set_action_enabled:
 609  * @application: a #GApplication
 610  * @name: the name of the application
 611  * @enabled: whether to enable or disable the action @name
 612  *
 613  * Sets whether the action @name inside @application should be enabled
 614  * or disabled.
 615  *
 616  * It is an error to call this function if @application is a proxy for
 617  * a remote application.
 618  *
 619  * Invoking a disabled action will not result in the #GApplication::action
 620  * signal being emitted.
 621  *
 622  * Since: 2.26
 623  */
 624 void
 625 g_application_set_action_enabled (GApplication *application,
 626                                   const gchar  *name,
 627                                   gboolean      enabled)
 628 {
 629   GApplicationAction *action;
 630
 631   g_return_if_fail (G_IS_APPLICATION (application));
 632   g_return_if_fail (name != NULL);
 633   g_return_if_fail (!application->priv->is_remote);
 634
 635   enabled = !!enabled;
 636
 637   action = g_hash_table_lookup (application->priv->actions, name);
 638   g_return_if_fail (action != NULL);
 639   if (action->enabled == enabled)
 640     return;
 641
 642   action->enabled = enabled;
 643
 644   queue_actions_change_notification (application);
 645 }
 646
 647
 648 /**
 649  * g_application_get_action_description:
 650  * @application: a #GApplication
 651  * @name: Action name
 652  *
 653  * Gets the description of the action @name.
 654  *
 655  * It is an error to call this function if @application is a proxy for
 656  * a remote application.
 657  *
 658  * Returns: Description for the given action named @name
 659  *
 660  * Since: 2.26
 661  */
 662 G_CONST_RETURN gchar *
 663 g_application_get_action_description (GApplication *application,
 664                                       const gchar  *name)
 665 {
 666   GApplicationAction *action;
 667
 668   g_return_val_if_fail (G_IS_APPLICATION (application), NULL);
 669   g_return_val_if_fail (name != NULL, NULL);
 670   g_return_val_if_fail (!application->priv->is_remote, NULL);
 671
 672   action = g_hash_table_lookup (application->priv->actions, name);
 673   g_return_val_if_fail (action != NULL, NULL);
 674
 675   return action->description;
 676 }
 677
 678
 679 /**
 680  * g_application_get_action_enabled:
 681  * @application: a #GApplication
 682  * @name: the name of the action
 683  *
 684  * Retrieves whether the action @name is enabled or not.
 685  *
 686  * See g_application_set_action_enabled().
 687  *
 688  * It is an error to call this function if @application is a proxy for
 689  * a remote application.
 690  *
 691  * Return value: %TRUE if the action was enabled, and %FALSE otherwise
 692  *
 693  * Since: 2.26
 694  */
 695 gboolean
 696 g_application_get_action_enabled (GApplication *application,
 697                                   const gchar  *name)
 698 {
 699   GApplicationAction *action;
 700
 701   g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
 702   g_return_val_if_fail (name != NULL, FALSE);
 703   g_return_val_if_fail (!application->priv->is_remote, FALSE);
 704
 705   action = g_hash_table_lookup (application->priv->actions, name);
 706   g_return_val_if_fail (action != NULL, FALSE);
 707
 708   return action->enabled;
 709 }
 710
 711 /**
 712  * g_application_run:
 713  * @application: a #GApplication
 714  *
 715  * Starts the application.
 716  *
 717  * The default implementation of this virtual function will simply run
 718  * a main loop.
 719  *
 720  * It is an error to call this function if @application is a proxy for
 721  * a remote application.
 722  *
 723  * Since: 2.26
 724  */
 725 void
 726 g_application_run (GApplication *application)
 727 {
 728   g_return_if_fail (G_IS_APPLICATION (application));
 729   g_return_if_fail (!application->priv->is_remote);
 730
 731   G_APPLICATION_GET_CLASS (application)->run (application);
 732 }
 733
 734 /**
 735  * g_application_quit:
 736  * @application: a #GApplication
 737  * @timestamp: Platform-specific event timestamp, may be 0 for default
 738  *
 739  * Request that the application quits.
 740  *
 741  * This function has different behavior depending on whether @application
 742  * is acting as a proxy for another process.  In the normal case where
 743  * the current process is hosting the application, the default
 744  * implementation will quit the main loop created by g_application_run().
 745  *
 746  * If @application is a proxy, then the remote process will be asked
 747  * to quit.
 748  *
 749  * Returns: %TRUE if the application accepted the request, %FALSE otherwise
 750  *
 751  * Since: 2.26
 752  */
 753 gboolean
 754 g_application_quit (GApplication *application,
 755                     guint         timestamp)
 756 {
 757   gboolean retval = FALSE;
 758
 759   g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
 760
 761   if (application->priv->is_remote)
 762     {
 763        _g_application_platform_remote_quit (application, timestamp);
 764        retval = TRUE;
 765     }
 766   else
 767     g_signal_emit (application, application_signals[QUIT], 0, timestamp, &retval);
 768
 769   return retval;
 770 }
 771
 772 /**
 773  * g_application_get_instance:
 774  *
 775  * In the normal case where there is exactly one #GApplication instance
 776  * in this process, return that instance.  If there are multiple, the
 777  * first one created will be returned.  Otherwise, return %NULL.
 778  *
 779  * Returns: (transfer none): The primary instance of #GApplication,
 780  *   or %NULL if none is set
 781  *
 782  * Since: 2.26
 783  */
 784 GApplication *
 785 g_application_get_instance (void)
 786 {
 787   return primary_application;
 788 }
 789
 790 /**
 791  * g_application_get_id:
 792  *
 793  * Retrieves the platform-specific identifier for the #GApplication.
 794  *
 795  * Return value: The platform-specific identifier. The returned string
 796  *   is owned by the #GApplication instance and it should never be
 797  *   modified or freed
 798  *
 799  * Since: 2.26
 800  */
 801 G_CONST_RETURN gchar *
 802 g_application_get_id (GApplication *application)
 803 {
 804   g_return_val_if_fail (G_IS_APPLICATION (application), NULL);
 805
 806   return application->priv->appid;
 807 }
 808
 809 /**
 810  * g_application_is_remote:
 811  * @application: a #GApplication
 812  *
 813  * Returns: %TRUE if this object represents a proxy for a remote application.
 814  */
 815 gboolean
 816 g_application_is_remote (GApplication *application)
 817 {
 818   g_return_val_if_fail (G_IS_APPLICATION (application), FALSE);
 819
 820   return application->priv->is_remote;
 821 }
 822
 823 static void
 824 g_application_init (GApplication *app)
 825 {
 826   app->priv = G_TYPE_INSTANCE_GET_PRIVATE (app,
 827                                            G_TYPE_APPLICATION,
 828                                            GApplicationPrivate);
 829
 830   app->priv->actions = g_hash_table_new_full (g_str_hash, g_str_equal,
 831                                               NULL,
 832                                               g_application_action_free);
 833   app->priv->default_quit = TRUE;
 834   app->priv->is_remote = TRUE;
 835 }
 836
 837 static void
 838 g_application_get_property (GObject    *object,
 839                             guint       prop_id,
 840                             GValue     *value,
 841                             GParamSpec *pspec)
 842 {
 843   GApplication *app = G_APPLICATION (object);
 844
 845   switch (prop_id)
 846     {
 847     case PROP_APPID:
 848       g_value_set_string (value, g_application_get_id (app));
 849       break;
 850
 851     case PROP_DEFAULT_QUIT:
 852       g_value_set_boolean (value, app->priv->default_quit);
 853       break;
 854
 855     case PROP_IS_REMOTE:
 856       g_value_set_boolean (value, g_application_is_remote (app));
 857       break;
 858
 859     default:
 860       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 861     }
 862 }
 863
 864 static void
 865 g_application_set_property (GObject      *object,
 866                             guint         prop_id,
 867                             const GValue *value,
 868                             GParamSpec   *pspec)
 869 {
 870   GApplication *app = G_APPLICATION (object);
 871
 872   switch (prop_id)
 873     {
 874     case PROP_APPID:
 875       g_return_if_fail (_g_application_validate_id (g_value_get_string (value)));
 876       app->priv->appid = g_value_dup_string (value);
 877       break;
 878
 879     case PROP_DEFAULT_QUIT:
 880       app->priv->default_quit = g_value_get_boolean (value);
 881       break;
 882
 883     default:
 884       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 885     }
 886 }
 887
 888 static GObject*
 889 g_application_constructor (GType                  type,
 890                            guint                  n_construct_properties,
 891                            GObjectConstructParam *construct_params)
 892 {
 893   GApplication *app;
 894   GObject *object;
 895   const char *appid = NULL;
 896   guint i;
 897
 898   for (i = 0; i < n_construct_properties; i++)
 899     {
 900       GObjectConstructParam *param = &construct_params[i];
 901       if (strcmp (param->pspec->name, "appid") == 0)
 902         appid = g_value_get_string (param->value);
 903     }
 904
 905   g_return_val_if_fail (appid != NULL, NULL);
 906
 907   app = application_for_appid (appid);
 908   if (app != NULL)
 909     return g_object_ref (app);
 910
 911   object = (* G_OBJECT_CLASS (g_application_parent_class)->constructor) (type,
 912                                                                          n_construct_properties,
 913                                                                          construct_params);
 914   app = G_APPLICATION (object);
 915
 916   if (primary_application == NULL)
 917     primary_application = app;
 918   g_hash_table_insert (instances_for_appid, g_strdup (appid), app);
 919
 920   return object;
 921 }
 922
 923 static void
 924 g_application_finalize (GObject *object)
 925 {
 926   GApplication *app = G_APPLICATION (object);
 927
 928   g_free (app->priv->appid);
 929   if (app->priv->actions)
 930     g_hash_table_unref (app->priv->actions);
 931   if (app->priv->actions_changed_id)
 932     g_source_remove (app->priv->actions_changed_id);
 933   if (app->priv->mainloop)
 934     g_main_loop_unref (app->priv->mainloop);
 935
 936 #ifdef G_OS_UNIX
 937   g_free (app->priv->dbus_path);
 938   if (app->priv->session_bus)
 939     g_object_unref (app->priv->session_bus);
 940 #endif
 941
 942   G_OBJECT_CLASS (g_application_parent_class)->finalize (object);
 943 }
 944
 945 static void
 946 g_application_class_init (GApplicationClass *klass)
 947 {
 948   GObjectClass *gobject_class G_GNUC_UNUSED = G_OBJECT_CLASS (klass);
 949
 950   g_type_class_add_private (klass, sizeof (GApplicationPrivate));
 951
 952   gobject_class->constructor = g_application_constructor;
 953   gobject_class->set_property = g_application_set_property;
 954   gobject_class->get_property = g_application_get_property;
 955
 956   gobject_class->finalize = g_application_finalize;
 957
 958   klass->run = g_application_default_run;
 959   klass->quit = g_application_default_quit;
 960
 961   application_signals[QUIT] =
 962     g_signal_new (g_intern_static_string ("quit"),
 963                   G_OBJECT_CLASS_TYPE (klass),
 964                   G_SIGNAL_RUN_LAST,
 965                   G_STRUCT_OFFSET (GApplicationClass, quit),
 966                   g_signal_accumulator_true_handled, NULL,
 967                   _gio_marshal_BOOLEAN__UINT,
 968                   G_TYPE_BOOLEAN, 1,
 969                   G_TYPE_UINT);
 970
 971   application_signals[ACTION] =
 972     g_signal_new (g_intern_static_string ("action"),
 973                   G_OBJECT_CLASS_TYPE (klass),
 974                   G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE | G_SIGNAL_DETAILED,
 975                   G_STRUCT_OFFSET (GApplicationClass, action),
 976                   NULL, NULL,
 977                   _gio_marshal_VOID__STRING_INT,
 978                   G_TYPE_NONE, 2,
 979                   G_TYPE_STRING,
 980                   G_TYPE_INT);
 981
 982    /**
 983    * GApplication::prepare-activation:
 984    * @arguments: A #GVariant with the signature "aay"
 985    * @platform_data: A #GVariant with the signature "a{sv}"
 986    *
 987    * This signal is emitted when a non-primary process for a given
 988    * application is invoked while your application is running; for
 989    * example, when a file browser launches your program to open a
 990    * file.  The raw operating system arguments are passed in the
 991    * @arguments variant.  Additional platform-dependent data is
 992    * stored in @platform_data.
 993    */
 994
 995   application_signals[PREPARE_ACTIVATION] =
 996     g_signal_new (g_intern_static_string ("prepare-activation"),
 997                   G_OBJECT_CLASS_TYPE (klass),
 998                   G_SIGNAL_RUN_LAST,
 999                   G_STRUCT_OFFSET (GApplicationClass, prepare_activation),
1000                   NULL, NULL,
1001                   _gio_marshal_VOID__BOXED_BOXED,
1002                   G_TYPE_NONE, 2,
1003                   G_TYPE_VARIANT,
1004                   G_TYPE_VARIANT);
1005
1006    /**
1007    * GApplication:appid:
1008    *
1009    * The unique identifier for this application.  See the documentation for
1010    * #GApplication for more information about this property.
1011    *
1012    */
1013   g_object_class_install_property (gobject_class,
1014                                    PROP_APPID,
1015                                    g_param_spec_string ("appid",
1016                                                         P_("Application ID"),
1017                                                         P_("Identifier for this application"),
1018                                                         NULL,
1019                                                         G_PARAM_READWRITE |
1020                                                         G_PARAM_CONSTRUCT_ONLY |
1021                                                         G_PARAM_STATIC_STRINGS));
1022
1023   /**
1024    * GApplication:default-quit:
1025    *
1026    * By default, if a different process is running this application, the
1027    * process will be exited.  Set this property to %FALSE to allow custom
1028    * interaction with the remote process.
1029    *
1030    */
1031   g_object_class_install_property (gobject_class,
1032                                    PROP_DEFAULT_QUIT,
1033                                    g_param_spec_boolean ("default-quit",
1034                                                          P_("Default Quit"),
1035                                                          P_("Exit the process by default"),
1036                                                          TRUE,
1037                                                          G_PARAM_READWRITE |
1038                                                          G_PARAM_CONSTRUCT_ONLY |
1039                                                          G_PARAM_STATIC_STRINGS));
1040
1041
1042   /**
1043    * GApplication:is-remote:
1044    *
1045    * This property is %TRUE if this application instance represents a proxy
1046    * to the instance of this application in another process.
1047    *
1048    */
1049   g_object_class_install_property (gobject_class,
1050                                    PROP_IS_REMOTE,
1051                                    g_param_spec_boolean ("is-remote",
1052                                                          P_("Is Remote"),
1053                                                          P_("Whether this application is a proxy for another process"),
1054                                                          TRUE,
1055                                                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1056 }
1057
1058 #define __G_APPLICATION_C__
1059 #include "gioaliasdef.c"