Pileus Git - ~andy/gtk/blob - gtk/gtkapplication.c

   1 /*
   2  * Copyright © 2010 Codethink Limited
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the licence, or (at 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 Public
  15  * 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  * Author: Ryan Lortie <desrt@desrt.ca>
  20  */
  21
  22 #include "config.h"
  23
  24 #include "gtkapplication.h"
  25
  26 #include <stdlib.h>
  27 #ifdef HAVE_UNISTD_H
  28 #include <unistd.h>
  29 #endif
  30 #include <string.h>
  31
  32 #include "gtkapplicationprivate.h"
  33 #include "gtkmarshalers.h"
  34 #include "gtkmain.h"
  35 #include "gtkaccelmapprivate.h"
  36 #include "gactionmuxer.h"
  37
  38 #ifdef GDK_WINDOWING_QUARTZ
  39 #include "gtkquartz-menu.h"
  40 #import <Cocoa/Cocoa.h>
  41 #endif
  42
  43 #include <gdk/gdk.h>
  44 #ifdef GDK_WINDOWING_X11
  45 #include <gdk/x11/gdkx.h>
  46 #endif
  47
  48 /**
  49  * SECTION:gtkapplication
  50  * @title: GtkApplication
  51  * @short_description: Application class
  52  *
  53  * #GtkApplication is a class that handles many important aspects
  54  * of a GTK+ application in a convenient fashion, without enforcing
  55  * a one-size-fits-all application model.
  56  *
  57  * Currently, GtkApplication handles GTK+ initialization, application
  58  * uniqueness, provides some basic scriptability and desktop shell integration
  59  * by exporting actions and menus and manages a list of toplevel windows whose
  60  * life-cycle is automatically tied to the life-cycle of your application.
  61  *
  62  * While GtkApplication works fine with plain #GtkWindows, it is recommended
  63  * to use it together with #GtkApplicationWindow.
  64  *
  65  * When GDK threads are enabled, GtkApplication will acquire the GDK
  66  * lock when invoking actions that arrive from other processes.  The GDK
  67  * lock is not touched for local action invocations.  In order to have
  68  * actions invoked in a predictable context it is therefore recommended
  69  * that the GDK lock be held while invoking actions locally with
  70  * g_action_group_activate_action().  The same applies to actions
  71  * associated with #GtkApplicationWindow and to the 'activate' and
  72  * 'open' #GApplication methods.
  73  *
  74  * To set an application menu on a GtkApplication, use
  75  * g_application_set_app_menu(). The #GMenuModel that this function
  76  * expects is usually constructed using #GtkBuilder, as seen in the
  77  * following example. To set a menubar that will be automatically picked
  78  * up by #GApplicationWindows, use g_application_set_menubar(). GTK+
  79  * makes these menus appear as expected, depending on the platform
  80  * the application is running on.
  81  *
  82  * <figure label="Menu integration in OS X">
  83  * <graphic fileref="bloatpad-osx.png" format="PNG"/>
  84  * </figure>
  85  *
  86  * <figure label="Menu integration in GNOME">
  87  * <graphic fileref="bloatpad-gnome.png" format="PNG"/>
  88  * </figure>
  89  *
  90  * <example id="gtkapplication"><title>A simple application</title>
  91  * <programlisting>
  92  * <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../examples/bloatpad.c">
  93  *  <xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback>
  94  * </xi:include>
  95  * </programlisting>
  96  * </example>
  97  */
  98
  99 enum {
 100   WINDOW_ADDED,
 101   WINDOW_REMOVED,
 102   LAST_SIGNAL
 103 };
 104
 105 static guint gtk_application_signals[LAST_SIGNAL];
 106
 107 G_DEFINE_TYPE (GtkApplication, gtk_application, G_TYPE_APPLICATION)
 108
 109 struct _GtkApplicationPrivate
 110 {
 111   GList *windows;
 112
 113 #ifdef GDK_WINDOWING_X11
 114   GDBusConnection *session;
 115   gchar *window_prefix;
 116   guint next_id;
 117 #endif
 118
 119 #ifdef GDK_WINDOWING_QUARTZ
 120   GActionMuxer *muxer;
 121   GMenu *combined;
 122 #endif
 123 };
 124
 125 #ifdef GDK_WINDOWING_X11
 126 static void
 127 gtk_application_window_added_x11 (GtkApplication *application,
 128                                   GtkWindow      *window)
 129 {
 130   if (application->priv->session == NULL)
 131     return;
 132
 133   if (GTK_IS_APPLICATION_WINDOW (window))
 134     {
 135       GtkApplicationWindow *app_window = GTK_APPLICATION_WINDOW (window);
 136       gboolean success;
 137
 138       /* GtkApplicationWindow associates with us when it is first created,
 139        * so surely it's not realized yet...
 140        */
 141       g_assert (!gtk_widget_get_realized (GTK_WIDGET (window)));
 142
 143       do
 144         {
 145           gchar *window_path;
 146           guint window_id;
 147
 148           window_id = application->priv->next_id++;
 149           window_path = g_strdup_printf ("%s%d", application->priv->window_prefix, window_id);
 150           success = gtk_application_window_publish (app_window, application->priv->session, window_path);
 151           g_free (window_path);
 152         }
 153       while (!success);
 154     }
 155 }
 156
 157 static void
 158 gtk_application_window_removed_x11 (GtkApplication *application,
 159                                     GtkWindow      *window)
 160 {
 161   if (application->priv->session == NULL)
 162     return;
 163
 164   if (GTK_IS_APPLICATION_WINDOW (window))
 165     gtk_application_window_unpublish (GTK_APPLICATION_WINDOW (window));
 166 }
 167
 168 static gchar *
 169 window_prefix_from_appid (const gchar *appid)
 170 {
 171   gchar *appid_path, *iter;
 172
 173   appid_path = g_strconcat ("/", appid, "/windows/", NULL);
 174   for (iter = appid_path; *iter; iter++)
 175     {
 176       if (*iter == '.')
 177         *iter = '/';
 178
 179       if (*iter == '-')
 180         *iter = '_';
 181     }
 182
 183   return appid_path;
 184 }
 185
 186 static void
 187 gtk_application_startup_x11 (GtkApplication *application)
 188 {
 189   const gchar *application_id;
 190
 191   application_id = g_application_get_application_id (G_APPLICATION (application));
 192   application->priv->session = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, NULL);
 193   application->priv->window_prefix = window_prefix_from_appid (application_id);
 194 }
 195
 196 static void
 197 gtk_application_shutdown_x11 (GtkApplication *application)
 198 {
 199   g_free (application->priv->window_prefix);
 200   application->priv->window_prefix = NULL;
 201   if (application->priv->session)
 202     {
 203       g_object_unref (application->priv->session);
 204       application->priv->session = NULL;
 205     }
 206 }
 207 #endif
 208
 209 #ifdef GDK_WINDOWING_QUARTZ
 210 static void
 211 gtk_application_menu_changed_quartz (GObject    *object,
 212                                      GParamSpec *pspec,
 213                                      gpointer    user_data)
 214 {
 215   GtkApplication *application = GTK_APPLICATION (object);
 216   GMenu *combined;
 217
 218   combined = g_menu_new ();
 219   g_menu_append_submenu (combined, "Application", g_application_get_app_menu (application));
 220   g_menu_append_section (combined, NULL, gtk_application_get_menubar (application));
 221
 222   gtk_quartz_set_main_menu (G_MENU_MODEL (combined), G_ACTION_OBSERVABLE (application->priv->muxer));
 223 }
 224
 225 static void
 226 gtk_application_startup_quartz (GtkApplication *application)
 227 {
 228   [NSApp finishLaunching];
 229
 230   application->priv->muxer = g_action_muxer_new ();
 231   g_action_muxer_insert (application->priv->muxer, "app", G_ACTION_GROUP (application));
 232
 233   g_signal_connect (application, "notify::app-menu", G_CALLBACK (gtk_application_menu_changed_quartz), NULL);
 234   g_signal_connect (application, "notify::menubar", G_CALLBACK (gtk_application_menu_changed_quartz), NULL);
 235   gtk_application_menu_changed_quartz (G_OBJECT (application), NULL, NULL);
 236 }
 237
 238 static void
 239 gtk_application_shutdown_quartz (GtkApplication *application)
 240 {
 241   g_signal_handlers_disconnect_by_func (application, gtk_application_menu_changed_quartz, NULL);
 242
 243   g_object_unref (application->priv->muxer);
 244   application->priv->muxer = NULL;
 245 }
 246
 247 static void
 248 gtk_application_focus_changed (GtkApplication *application,
 249                                GtkWindow      *window)
 250 {
 251   if (G_IS_ACTION_GROUP (window))
 252     g_action_muxer_insert (application->priv->muxer, "win", G_ACTION_GROUP (window));
 253   else
 254     g_action_muxer_remove (application->priv->muxer, "win");
 255 }
 256 #endif
 257
 258 static gboolean
 259 gtk_application_focus_in_event_cb (GtkWindow      *window,
 260                                    GdkEventFocus  *event,
 261                                    GtkApplication *application)
 262 {
 263   GtkApplicationPrivate *priv = application->priv;
 264   GList *link;
 265
 266   /* Keep the window list sorted by most-recently-focused. */
 267   link = g_list_find (priv->windows, window);
 268   if (link != NULL && link != priv->windows)
 269     {
 270       priv->windows = g_list_remove_link (priv->windows, link);
 271       priv->windows = g_list_concat (link, priv->windows);
 272     }
 273
 274 #ifdef GDK_WINDOWING_QUARTZ
 275   gtk_application_focus_changed (application, window);
 276 #endif
 277
 278   return FALSE;
 279 }
 280
 281 static void
 282 gtk_application_startup (GApplication *application)
 283 {
 284   G_APPLICATION_CLASS (gtk_application_parent_class)
 285     ->startup (application);
 286
 287   gtk_init (0, 0);
 288
 289 #ifdef GDK_WINDOWING_X11
 290   gtk_application_startup_x11 (GTK_APPLICATION (application));
 291 #endif
 292
 293 #ifdef GDK_WINDOWING_QUARTZ
 294   gtk_application_startup_quartz (GTK_APPLICATION (application));
 295 #endif
 296 }
 297
 298 static void
 299 gtk_application_shutdown (GApplication *application)
 300 {
 301 #ifdef GDK_WINDOWING_X11
 302   gtk_application_shutdown_x11 (GTK_APPLICATION (application));
 303 #endif
 304
 305 #ifdef GDK_WINDOWING_QUARTZ
 306   gtk_application_shutdown_quartz (GTK_APPLICATION (application));
 307 #endif
 308
 309   G_APPLICATION_CLASS (gtk_application_parent_class)
 310     ->shutdown (application);
 311 }
 312
 313 static void
 314 gtk_application_add_platform_data (GApplication    *application,
 315                                    GVariantBuilder *builder)
 316 {
 317   const gchar *startup_id;
 318
 319   startup_id = getenv ("DESKTOP_STARTUP_ID");
 320
 321   if (startup_id && g_utf8_validate (startup_id, -1, NULL))
 322     g_variant_builder_add (builder, "{sv}", "desktop-startup-id",
 323                            g_variant_new_string (startup_id));
 324 }
 325
 326 static void
 327 gtk_application_before_emit (GApplication *application,
 328                              GVariant     *platform_data)
 329 {
 330   GVariantIter iter;
 331   const gchar *key;
 332   GVariant *value;
 333
 334   gdk_threads_enter ();
 335
 336   g_variant_iter_init (&iter, platform_data);
 337   while (g_variant_iter_loop (&iter, "{&sv}", &key, &value))
 338     {
 339 #ifdef GDK_WINDOWING_X11
 340       if (strcmp (key, "desktop-startup-id") == 0)
 341         {
 342           GdkDisplay *display;
 343           const gchar *id;
 344
 345           display = gdk_display_get_default ();
 346           id = g_variant_get_string (value, NULL);
 347           if (GDK_IS_X11_DISPLAY (display))
 348             gdk_x11_display_set_startup_notification_id (display, id);
 349        }
 350 #endif
 351     }
 352 }
 353
 354 static void
 355 gtk_application_after_emit (GApplication *application,
 356                             GVariant     *platform_data)
 357 {
 358   gdk_notify_startup_complete ();
 359
 360   gdk_threads_leave ();
 361 }
 362
 363 static void
 364 gtk_application_init (GtkApplication *application)
 365 {
 366   application->priv = G_TYPE_INSTANCE_GET_PRIVATE (application,
 367                                                    GTK_TYPE_APPLICATION,
 368                                                    GtkApplicationPrivate);
 369 }
 370
 371 static void
 372 gtk_application_window_added (GtkApplication *application,
 373                               GtkWindow      *window)
 374 {
 375   GtkApplicationPrivate *priv = application->priv;
 376
 377   priv->windows = g_list_prepend (priv->windows, window);
 378   gtk_window_set_application (window, application);
 379   g_application_hold (G_APPLICATION (application));
 380
 381   g_signal_connect (window, "focus-in-event",
 382                     G_CALLBACK (gtk_application_focus_in_event_cb),
 383                     application);
 384
 385 #ifdef GDK_WINDOWING_X11
 386   gtk_application_window_added_x11 (application, window);
 387 #endif
 388 }
 389
 390 static void
 391 gtk_application_window_removed (GtkApplication *application,
 392                                 GtkWindow      *window)
 393 {
 394   GtkApplicationPrivate *priv = application->priv;
 395
 396 #ifdef GDK_WINDOWING_X11
 397   gtk_application_window_removed_x11 (application, window);
 398 #endif
 399
 400   g_signal_handlers_disconnect_by_func (window,
 401                                         gtk_application_focus_in_event_cb,
 402                                         application);
 403
 404   g_application_release (G_APPLICATION (application));
 405   priv->windows = g_list_remove (priv->windows, window);
 406   gtk_window_set_application (window, NULL);
 407 }
 408
 409 static void
 410 extract_accel_from_menu_item (GMenuModel     *model,
 411                               gint            item,
 412                               GtkApplication *app)
 413 {
 414   GMenuAttributeIter *iter;
 415   const gchar *key;
 416   GVariant *value;
 417   const gchar *accel = NULL;
 418   const gchar *action = NULL;
 419   GVariant *target = NULL;
 420
 421   iter = g_menu_model_iterate_item_attributes (model, item);
 422   while (g_menu_attribute_iter_get_next (iter, &key, &value))
 423     {
 424       if (g_str_equal (key, "action") && g_variant_is_of_type (value, G_VARIANT_TYPE_STRING))
 425         action = g_variant_get_string (value, NULL);
 426       else if (g_str_equal (key, "accel") && g_variant_is_of_type (value, G_VARIANT_TYPE_STRING))
 427         accel = g_variant_get_string (value, NULL);
 428       else if (g_str_equal (key, "target"))
 429         target = g_variant_ref (value);
 430       g_variant_unref (value);
 431     }
 432   g_object_unref (iter);
 433
 434   if (accel && action)
 435     gtk_application_add_accelerator (app, accel, action, target);
 436
 437   if (target)
 438     g_variant_unref (target);
 439 }
 440
 441 static void
 442 extract_accels_from_menu (GMenuModel     *model,
 443                           GtkApplication *app)
 444 {
 445   gint i;
 446   GMenuLinkIter *iter;
 447   const gchar *key;
 448   GMenuModel *m;
 449
 450   for (i = 0; i < g_menu_model_get_n_items (model); i++)
 451     {
 452       extract_accel_from_menu_item (model, i, app);
 453
 454       iter = g_menu_model_iterate_item_links (model, i);
 455       while (g_menu_link_iter_get_next (iter, &key, &m))
 456         {
 457           extract_accels_from_menu (m, app);
 458           g_object_unref (m);
 459         }
 460       g_object_unref (iter);
 461     }
 462 }
 463
 464 static void
 465 gtk_application_notify (GObject    *object,
 466                         GParamSpec *pspec)
 467 {
 468   if (strcmp (pspec->name, "app-menu") == 0 ||
 469       strcmp (pspec->name, "menubar") == 0)
 470     {
 471       GMenuModel *model;
 472       g_object_get (object, pspec->name, &model, NULL);
 473       if (model)
 474         {
 475           extract_accels_from_menu (model, GTK_APPLICATION (object));
 476           g_object_unref (model);
 477         }
 478     }
 479
 480   if (G_OBJECT_CLASS (gtk_application_parent_class)->notify)
 481     G_OBJECT_CLASS (gtk_application_parent_class)->notify (object, pspec);
 482 }
 483
 484 static void
 485 gtk_application_class_init (GtkApplicationClass *class)
 486 {
 487   GObjectClass *object_class = G_OBJECT_CLASS (class);
 488   GApplicationClass *application_class = G_APPLICATION_CLASS (class);
 489
 490   object_class->notify = gtk_application_notify;
 491
 492   application_class->add_platform_data = gtk_application_add_platform_data;
 493   application_class->before_emit = gtk_application_before_emit;
 494   application_class->after_emit = gtk_application_after_emit;
 495   application_class->startup = gtk_application_startup;
 496   application_class->shutdown = gtk_application_shutdown;
 497
 498   class->window_added = gtk_application_window_added;
 499   class->window_removed = gtk_application_window_removed;
 500
 501   g_type_class_add_private (class, sizeof (GtkApplicationPrivate));
 502
 503   /**
 504    * GtkApplication::window-added:
 505    * @application: the #GtkApplication which emitted the signal
 506    * @window: the newly-added #GtkWindow
 507    *
 508    * Emitted when a #GtkWindow is added to @application through
 509    * gtk_application_add_window().
 510    *
 511    * Since: 3.2
 512    */
 513   gtk_application_signals[WINDOW_ADDED] =
 514     g_signal_new ("window-added", GTK_TYPE_APPLICATION, G_SIGNAL_RUN_FIRST,
 515                   G_STRUCT_OFFSET (GtkApplicationClass, window_added),
 516                   NULL, NULL,
 517                   g_cclosure_marshal_VOID__OBJECT,
 518                   G_TYPE_NONE, 1, GTK_TYPE_WINDOW);
 519
 520   /**
 521    * GtkApplication::window-removed:
 522    * @application: the #GtkApplication which emitted the signal
 523    * @window: the #GtkWindow that is being removed
 524    *
 525    * Emitted when a #GtkWindow is removed from @application,
 526    * either as a side-effect of being destroyed or explicitly
 527    * through gtk_application_remove_window().
 528    *
 529    * Since: 3.2
 530    */
 531   gtk_application_signals[WINDOW_REMOVED] =
 532     g_signal_new ("window-removed", GTK_TYPE_APPLICATION, G_SIGNAL_RUN_FIRST,
 533                   G_STRUCT_OFFSET (GtkApplicationClass, window_removed),
 534                   NULL, NULL,
 535                   g_cclosure_marshal_VOID__OBJECT,
 536                   G_TYPE_NONE, 1, GTK_TYPE_WINDOW);
 537 }
 538
 539 /**
 540  * gtk_application_new:
 541  * @application_id: the application id
 542  * @flags: the application flags
 543  *
 544  * Creates a new #GtkApplication instance.
 545  *
 546  * This function calls g_type_init() for you. gtk_init() is called
 547  * as soon as the application gets registered as the primary instance.
 548  *
 549  * Note that commandline arguments are not passed to gtk_init().
 550  * All GTK+ functionality that is available via commandline arguments
 551  * can also be achieved by setting suitable environment variables
 552  * such as <envvar>G_DEBUG</envvar>, so this should not be a big
 553  * problem. If you absolutely must support GTK+ commandline arguments,
 554  * you can explicitly call gtk_init() before creating the application
 555  * instance.
 556  *
 557  * The application id must be valid. See g_application_id_is_valid().
 558  *
 559  * Returns: a new #GtkApplication instance
 560  */
 561 GtkApplication *
 562 gtk_application_new (const gchar       *application_id,
 563                      GApplicationFlags  flags)
 564 {
 565   g_return_val_if_fail (g_application_id_is_valid (application_id), NULL);
 566
 567   g_type_init ();
 568
 569   return g_object_new (GTK_TYPE_APPLICATION,
 570                        "application-id", application_id,
 571                        "flags", flags,
 572                        NULL);
 573 }
 574
 575 /**
 576  * gtk_application_add_window:
 577  * @application: a #GtkApplication
 578  * @window: a #GtkWindow
 579  *
 580  * Adds a window from @application.
 581  *
 582  * This call is equivalent to setting the #GtkWindow:application
 583  * property of @window to @application.
 584  *
 585  * Normally, the connection between the application and the window
 586  * will remain until the window is destroyed, but you can explicitly
 587  * remove it with gtk_application_remove_window().
 588  *
 589  * GTK+ will keep the application running as long as it has
 590  * any windows.
 591  *
 592  * Since: 3.0
 593  **/
 594 void
 595 gtk_application_add_window (GtkApplication *application,
 596                             GtkWindow      *window)
 597 {
 598   g_return_if_fail (GTK_IS_APPLICATION (application));
 599
 600   if (!g_list_find (application->priv->windows, window))
 601     g_signal_emit (application,
 602                    gtk_application_signals[WINDOW_ADDED], 0, window);
 603 }
 604
 605 /**
 606  * gtk_application_remove_window:
 607  * @application: a #GtkApplication
 608  * @window: a #GtkWindow
 609  *
 610  * Remove a window from @application.
 611  *
 612  * If @window belongs to @application then this call is equivalent to
 613  * setting the #GtkWindow:application property of @window to
 614  * %NULL.
 615  *
 616  * The application may stop running as a result of a call to this
 617  * function.
 618  *
 619  * Since: 3.0
 620  **/
 621 void
 622 gtk_application_remove_window (GtkApplication *application,
 623                                GtkWindow      *window)
 624 {
 625   g_return_if_fail (GTK_IS_APPLICATION (application));
 626
 627   if (g_list_find (application->priv->windows, window))
 628     g_signal_emit (application,
 629                    gtk_application_signals[WINDOW_REMOVED], 0, window);
 630 }
 631
 632 /**
 633  * gtk_application_get_windows:
 634  * @application: a #GtkApplication
 635  *
 636  * Gets a list of the #GtkWindows associated with @application.
 637  *
 638  * The list is sorted by most recently focused window, such that the first
 639  * element is the currently focused window. (Useful for choosing a parent
 640  * for a transient window.)
 641  *
 642  * The list that is returned should not be modified in any way. It will
 643  * only remain valid until the next focus change or window creation or
 644  * deletion.
 645  *
 646  * Returns: (element-type GtkWindow) (transfer none): a #GList of #GtkWindow
 647  *
 648  * Since: 3.0
 649  **/
 650 GList *
 651 gtk_application_get_windows (GtkApplication *application)
 652 {
 653   g_return_val_if_fail (GTK_IS_APPLICATION (application), NULL);
 654
 655   return application->priv->windows;
 656 }
 657
 658 /**
 659  * gtk_application_add_accelerator:
 660  * @application: a #GtkApplication
 661  * @accelerator: accelerator string
 662  * @action_name: the name of the action to activate
 663  * @parameter: (allow-none): parameter to pass when activating the action,
 664  *   or %NULL if the action does not accept an activation parameter
 665  *
 666  * Installs an accelerator that will cause the named action
 667  * to be activated when the key combination specificed by @accelerator
 668  * is pressed.
 669  *
 670  * @accelerator must be a string that can be parsed by
 671  * gtk_accelerator_parse(), e.g. "<Primary>q" or "<Control><Alt>p".
 672  *
 673  * @action_name must be the name of an action as it would be used
 674  * in the app menu, i.e. actions that have been added to the application
 675  * are referred to with an "app." prefix, and window-specific actions
 676  * with a "win." prefix.
 677  *
 678  * GtkApplication also extracts accelerators out of 'accel' attributes
 679  * in the #GMenuModels passed to g_application_set_app_menu() and
 680  * g_application_set_menubar(), which is usually more convenient
 681  * than calling this function for each accelerator.
 682  *
 683  * Since: 3.4
 684  */
 685 void
 686 gtk_application_add_accelerator (GtkApplication *application,
 687                                  const gchar    *accelerator,
 688                                  const gchar    *action_name,
 689                                  GVariant       *parameter)
 690 {
 691   gchar *accel_path;
 692   guint accel_key;
 693   GdkModifierType accel_mods;
 694
 695   g_return_if_fail (GTK_IS_APPLICATION (application));
 696
 697   /* Call this here, since gtk_init() is only getting called in startup() */
 698   _gtk_accel_map_init ();
 699
 700   gtk_accelerator_parse (accelerator, &accel_key, &accel_mods);
 701
 702   if (accel_key == 0)
 703     {
 704       g_warning ("Failed to parse accelerator: '%s'\n", accelerator);
 705       return;
 706     }
 707
 708   accel_path = _gtk_accel_path_for_action (action_name, parameter);
 709
 710   if (gtk_accel_map_lookup_entry (accel_path, NULL))
 711     gtk_accel_map_change_entry (accel_path, accel_key, accel_mods, TRUE);
 712   else
 713     gtk_accel_map_add_entry (accel_path, accel_key, accel_mods);
 714
 715   g_free (accel_path);
 716 }
 717
 718 /**
 719  * gtk_application_remove_accelerator:
 720  * @application: a #GtkApplication
 721  * @action_name: the name of the action to activate
 722  * @parameter: (allow-none): parameter to pass when activating the action,
 723  *   or %NULL if the action does not accept an activation parameter
 724  *
 725  * Removes an accelerator that has been previously added
 726  * with gtk_application_add_accelerator().
 727  *
 728  * Since: 3.4
 729  */
 730 void
 731 gtk_application_remove_accelerator (GtkApplication *application,
 732                                     const gchar    *action_name,
 733                                     GVariant       *parameter)
 734 {
 735   gchar *accel_path;
 736
 737   g_return_if_fail (GTK_IS_APPLICATION (application));
 738
 739   accel_path = _gtk_accel_path_for_action (action_name, parameter);
 740
 741   if (!gtk_accel_map_lookup_entry (accel_path, NULL))
 742     {
 743       g_warning ("No accelerator found for '%s'\n", accel_path);
 744       g_free (accel_path);
 745       return;
 746     }
 747
 748   gtk_accel_map_change_entry (accel_path, 0, 0, FALSE);
 749   g_free (accel_path);
 750 }
 751
 752 /**
 753  * gtk_application_set_app_menu:
 754  * @application: a #GtkApplication
 755  * @app_menu: (allow-none): a #GMenuModel, or %NULL
 756  *
 757  * Sets or unsets the application menu for @application.
 758  *
 759  * The application menu is a single menu containing items that typically
 760  * impact the application as a whole, rather than acting on a specific
 761  * window or document.  For example, you would expect to see
 762  * "Preferences" or "Quit" in an application menu, but not "Save" or
 763  * "Print".
 764  *
 765  * If supported, the application menu will be rendered by the desktop
 766  * environment.
 767  *
 768  * Since: 3.4
 769  */
 770 void
 771 gtk_application_set_app_menu (GtkApplication *application,
 772                               GMenuModel     *app_menu)
 773 {
 774   g_object_set (application, "app-menu", app_menu, NULL);
 775 }
 776
 777 /**
 778  * gtk_application_get_app_menu:
 779  * @application: a #GtkApplication
 780  *
 781  * Returns the menu model that has been set with
 782  * g_application_set_app_menu().
 783  *
 784  * Returns: the application menu of @application
 785  *
 786  * Since: 3.4
 787  */
 788 GMenuModel *
 789 gtk_application_get_app_menu (GtkApplication *application)
 790 {
 791   GMenuModel *app_menu;
 792
 793   g_object_get (application, "app-menu", &app_menu, NULL);
 794   g_object_unref (app_menu);
 795
 796   return app_menu;
 797 }
 798
 799 /**
 800  * gtk_application_set_menubar:
 801  * @application: a #GtkApplication
 802  * @menubar: (allow-none): a #GMenuModel, or %NULL
 803  *
 804  * Sets or unsets the menubar for windows of @application.
 805  *
 806  * This is a menubar in the traditional sense.
 807  *
 808  * Depending on the desktop environment, this may appear at the top of
 809  * each window, or at the top of the screen.  In some environments, if
 810  * both the application menu and the menubar are set, the application
 811  * menu will be presented as if it were the first item of the menubar.
 812  * Other environments treat the two as completely separate -- for
 813  * example, the application menu may be rendered by the desktop shell
 814  * while the menubar (if set) remains in each individual window.
 815  *
 816  * Since: 3.4
 817  */
 818 void
 819 gtk_application_set_menubar (GtkApplication *application,
 820                              GMenuModel     *menubar)
 821 {
 822   g_object_set (application, "menubar", menubar, NULL);
 823 }
 824
 825 /**
 826  * gtk_application_get_menubar:
 827  * @application: a #GtkApplication
 828  *
 829  * Returns the menu model that has been set with
 830  * g_application_set_menubar().
 831  *
 832  * Returns: the menubar for windows of @application
 833  *
 834  * Since: 3.4
 835  */
 836 GMenuModel *
 837 gtk_application_get_menubar (GtkApplication *application)
 838 {
 839   GMenuModel *menubar;
 840
 841   g_object_get (application, "menubar", &menubar, NULL);
 842   g_object_unref (menubar);
 843
 844   return menubar;
 845 }