1f9b4ebc1ea4aaedee3f5fa4ba41ba76b5545103
[hildon] / src / hildon-program.c
1 /*
2  * This file is a part of hildon
3  *
4  * Copyright (C) 2006 Nokia Corporation, all rights reserved.
5  *
6  * Contact: Rodrigo Novo <rodrigo.novo@nokia.com>
7  *
8  * This library is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public License
10  * as published by the Free Software Foundation; version 2.1 of
11  * the License, or (at your option) any later version.
12  *
13  * This library is distributed in the hope that it will be useful, but
14  * WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with this library; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
21  * 02110-1301 USA
22  *
23  */
24
25 /**
26  * SECTION:hildon-program
27  * @short_description: An object that represents an application running in the Hildon framework.
28  * @see_also: #HildonWindow, #HildonStackableWindow
29  *
30  * The #HildonProgram is an object used to represent an application running
31  * in the Hildon framework.
32  *
33  * Such an application is thought to have one or more #HildonWindow. These
34  * shall be registered to the #HildonProgram with hildon_program_add_window(),
35  * and can be unregistered similarly with hildon_program_remove_window().
36  *
37  * The #HildonProgram provides the programmer with commodities such
38  * as applying a common toolbar and menu to all the #HildonWindow
39  * registered to it. This is done with hildon_program_set_common_menu()
40  * and hildon_program_set_common_toolbar().
41  *
42  * The #HildonProgram is also used to apply program-wide properties that
43  * are specific to the Hildon framework. For instance
44  * hildon_program_set_can_hibernate() sets whether or not an application
45  * can be set to hibernate by the Hildon task navigator, in situations of
46  * low memory.
47  *
48  * <example>
49  * <programlisting>
50  * HildonProgram *program;
51  * HildonWindow *window1;
52  * HildonWindow *window2;
53  * GtkToolbar *common_toolbar, *window_specific_toolbar;
54  * GtkMenu *menu;
55  * <!-- -->
56  * program = HILDON_PROGRAM (hildon_program_get_instance ());
57  * <!-- -->
58  * window1 = HILDON_WINDOW (hildon_window_new ());
59  * window2 = HILDON_WINDOW (hildon_window_new ());
60  * <!-- -->
61  * common_toolbar = create_common_toolbar ();
62  * window_specific_toolbar = create_window_specific_toolbar ();
63  * <!-- -->
64  * menu = create_menu ();
65  * <!-- -->
66  * hildon_program_add_window (program, window1);
67  * hildon_program_add_window (program, window2);
68  * <!-- -->
69  * hildon_program_set_common_menu (program, menu);
70  * <!-- -->
71  * hildon_program_set_common_toolbar (program, common_toolbar);
72  * hildon_window_add_toolbar (window1, window_specific_toolbar);
73  * <!-- -->
74  * hildon_program_set_can_hibernate (program, TRUE);
75  * </programlisting>
76  * </example>
77  */
78
79 #undef                                          HILDON_DISABLE_DEPRECATED
80
81 #ifdef                                          HAVE_CONFIG_H
82 #include                                        <config.h>
83 #endif
84
85 #include                                        <X11/Xatom.h>
86
87 #include                                        "hildon-program.h"
88 #include                                        "hildon-program-private.h"
89 #include                                        "hildon-window-private.h"
90 #include                                        "hildon-window-stack.h"
91 #include                                        "hildon-app-menu-private.h"
92
93 static void
94 hildon_program_init                             (HildonProgram *self);
95
96 static void
97 hildon_program_finalize                         (GObject *self);
98
99 static void
100 hildon_program_class_init                       (HildonProgramClass *self);
101
102 static void
103 hildon_program_get_property                     (GObject *object, 
104                                                  guint property_id,
105                                                  GValue *value, 
106                                                  GParamSpec *pspec);
107 static void
108 hildon_program_set_property                     (GObject *object, 
109                                                  guint property_id,
110                                                  const GValue *value, 
111                                                  GParamSpec *pspec);
112
113 enum
114 {
115     PROP_0,
116     PROP_IS_TOPMOST,
117     PROP_KILLABLE
118 };
119
120 GType G_GNUC_CONST
121 hildon_program_get_type                         (void)
122 {
123     static GType program_type = 0;
124
125     if (! program_type)
126     {
127         static const GTypeInfo program_info =
128         {
129             sizeof (HildonProgramClass),
130             NULL,       /* base_init */
131             NULL,       /* base_finalize */
132             (GClassInitFunc) hildon_program_class_init,
133             NULL,       /* class_finalize */
134             NULL,       /* class_data */
135             sizeof (HildonProgram),
136             0,  /* n_preallocs */
137             (GInstanceInitFunc) hildon_program_init,
138         };
139         program_type = g_type_register_static(G_TYPE_OBJECT,
140                 "HildonProgram", &program_info, 0);
141     }
142     return program_type;
143 }
144
145 static void
146 hildon_program_init                             (HildonProgram *self)
147 {
148     HildonProgramPrivate *priv = HILDON_PROGRAM_GET_PRIVATE (self);
149     g_assert (priv);
150     
151     priv->killable = FALSE;
152     priv->window_count = 0;
153     priv->is_topmost = FALSE;
154     priv->window_group = GDK_WINDOW_XID (gdk_display_get_default_group (gdk_display_get_default()));
155     priv->common_menu = NULL;
156     priv->common_app_menu = NULL;
157     priv->common_toolbar = NULL;
158     priv->windows = NULL;
159 }
160
161 static void
162 hildon_program_finalize                         (GObject *self)
163 {
164     HildonProgramPrivate *priv = HILDON_PROGRAM_GET_PRIVATE (HILDON_PROGRAM (self));
165     g_assert (priv);
166     
167     if (priv->common_toolbar)
168     {
169         g_object_unref (priv->common_toolbar);
170         priv->common_toolbar = NULL;
171     }
172
173     if (priv->common_menu)
174     {
175         g_object_unref (priv->common_menu);
176         priv->common_menu = NULL;
177     }
178 }
179
180 static void
181 hildon_program_class_init                       (HildonProgramClass *self)
182 {
183     GObjectClass *object_class = G_OBJECT_CLASS (self);
184
185     g_type_class_add_private (self, sizeof (HildonProgramPrivate));
186
187     /* Set up object virtual functions */
188     object_class->finalize      = hildon_program_finalize;
189     object_class->set_property  = hildon_program_set_property;
190     object_class->get_property  = hildon_program_get_property;
191
192     /* Install properties */
193
194     /**
195      * HildonProgram:is-topmost:
196      *
197      * Whether one of the program's window or dialog currently
198      * is activated by window manager. 
199      */
200     g_object_class_install_property (object_class, PROP_IS_TOPMOST,
201                 g_param_spec_boolean ("is-topmost",
202                 "Is top-most",
203                 "Whether one of the program's window or dialog currently "
204                 "is activated by window manager",
205                 FALSE,
206                 G_PARAM_READABLE)); 
207
208     /**
209      * HildonProgram:can-hibernate:
210      *
211      * Whether the program should be set to hibernate by the Task
212      * Navigator in low memory situation.
213      */
214     g_object_class_install_property (object_class, PROP_KILLABLE,
215                 g_param_spec_boolean ("can-hibernate",
216                 "Can hibernate",
217                 "Whether the program should be set to hibernate by the Task "
218                 "Navigator in low memory situation",
219                 FALSE,
220                 G_PARAM_READWRITE)); 
221     return;
222 }
223
224 static void
225 hildon_program_set_property                     (GObject *object, 
226                                                  guint property_id,
227                                                  const GValue *value, 
228                                                  GParamSpec *pspec)
229 {
230     switch (property_id) {
231
232         case PROP_KILLABLE:
233             hildon_program_set_can_hibernate (HILDON_PROGRAM (object), g_value_get_boolean (value));
234             break;
235             
236         default:
237             G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
238             break;
239     }
240
241 }
242
243 static void
244 hildon_program_get_property                     (GObject *object, 
245                                                  guint property_id,
246                                                  GValue *value, 
247                                                  GParamSpec *pspec)
248 {
249     HildonProgramPrivate *priv = HILDON_PROGRAM_GET_PRIVATE (object);
250     g_assert (priv);
251
252     switch (property_id)
253     {
254         case PROP_KILLABLE:
255             g_value_set_boolean (value, priv->killable);
256             break;
257
258         case PROP_IS_TOPMOST:
259             g_value_set_boolean (value, priv->is_topmost);
260             break;
261
262         default:
263             G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
264             break;
265     }
266 }
267
268 /**
269  * hildon_program_pop_window_stack:
270  * @self: A #HildonProgram
271  *
272  * Pops a window from the stack.
273  *
274  * Deprecated: Use hildon_window_stack_pop() instead
275  *
276  * Returns: A #HildonStackableWindow, or %NULL
277  */
278 HildonStackableWindow *
279 hildon_program_pop_window_stack                 (HildonProgram *self)
280 {
281     HildonWindowStack *stack = hildon_window_stack_get_default ();
282     GtkWidget *win = hildon_window_stack_pop_1 (stack);
283     g_warning ("%s: this function is deprecated. Use hildon_window_stack_pop() instead", __FUNCTION__);
284     return win ? HILDON_STACKABLE_WINDOW (win) : NULL;
285 }
286
287 /**
288  * hildon_program_peek_window_stack:
289  * @self: A #HildonProgram
290  *
291  * Deprecated: Use hildon_window_stack_peek() instead
292  *
293  * Returns: A #HildonStackableWindow, or %NULL
294  */
295 HildonStackableWindow *
296 hildon_program_peek_window_stack                (HildonProgram *self)
297 {
298     HildonWindowStack *stack = hildon_window_stack_get_default ();
299     GtkWidget *win = hildon_window_stack_peek (stack);
300     g_warning ("%s: this function is deprecated. Use hildon_window_stack_peek() instead", __FUNCTION__);
301     return win ? HILDON_STACKABLE_WINDOW (win) : NULL;
302 }
303
304 /* Utilities */
305 static gint 
306 hildon_program_window_list_compare              (gconstpointer window_a, 
307                                                  gconstpointer window_b)
308 {
309     g_return_val_if_fail (HILDON_IS_WINDOW(window_a) && 
310                           HILDON_IS_WINDOW(window_b), 1);
311
312     return window_a != window_b;
313 }
314
315 /*
316  * foreach function, checks if a window is topmost and acts consequently
317  */
318 static void
319 hildon_program_window_list_is_is_topmost        (gpointer data, 
320                                                  gpointer window_id_)
321 {
322     if (data && HILDON_IS_WINDOW (data))
323     {
324         HildonWindow *window = HILDON_WINDOW (data);
325         Window window_id = * (Window*)window_id_;
326
327         hildon_window_update_topmost (window, window_id);
328     }
329 }
330
331 /*
332  * Check the _MB_CURRENT_APP_WINDOW on the root window, and update
333  * the top_most status accordingly
334  */
335 static void
336 hildon_program_update_top_most                  (HildonProgram *program)
337 {
338     XWMHints *wm_hints;
339     Window active_window;
340     HildonProgramPrivate *priv;
341
342     priv = HILDON_PROGRAM_GET_PRIVATE (program);
343     g_assert (priv);
344     
345     active_window = hildon_window_get_active_window();
346
347     if (active_window)
348     {
349       gint xerror;
350       
351       gdk_error_trap_push ();
352       wm_hints = XGetWMHints (GDK_DISPLAY (), active_window);
353       xerror = gdk_error_trap_pop ();
354       if (xerror)
355         return;
356
357       if (wm_hints)
358       {
359
360           if (wm_hints->window_group == priv->window_group)
361           {
362               if (!priv->is_topmost)
363               {
364                   priv->is_topmost = TRUE;
365                   g_object_notify (G_OBJECT (program), "is-topmost");
366               }
367           }
368           else if (priv->is_topmost)
369           {
370             priv->is_topmost = FALSE;
371             g_object_notify (G_OBJECT (program), "is-topmost");
372           }
373       }
374       XFree (wm_hints);
375     }
376
377     /* Check each window if it was is_topmost */
378     g_slist_foreach (priv->windows, 
379             (GFunc)hildon_program_window_list_is_is_topmost, &active_window);
380 }
381
382 /*
383  * We keep track of the _MB_CURRENT_APP_WINDOW property on the root window,
384  * to detect when a window belonging to this program was is_topmost. This
385  * is based on the window group WM hint.
386  */
387 static GdkFilterReturn
388 hildon_program_root_window_event_filter         (GdkXEvent *xevent,
389                                                  GdkEvent *event,
390                                                  gpointer data)
391 {
392     XAnyEvent *eventti = xevent;
393     HildonProgram *program = HILDON_PROGRAM (data);
394     Atom active_app_atom =
395             XInternAtom (GDK_DISPLAY (), "_MB_CURRENT_APP_WINDOW", False);
396
397     if (eventti->type == PropertyNotify)
398     {
399         XPropertyEvent *pevent = xevent;
400
401         if (pevent->atom == active_app_atom)
402         {
403             hildon_program_update_top_most (program);
404         }
405     }
406
407     return GDK_FILTER_CONTINUE;
408 }
409
410 /* 
411  * Checks if the window is the topmost window of the program and in
412  * that case forces the window to take the common toolbar.
413  */
414 static void
415 hildon_program_common_toolbar_topmost_window    (gpointer window, 
416                                                  gpointer data)
417 {
418     if (HILDON_IS_WINDOW (window) && hildon_window_get_is_topmost (HILDON_WINDOW (window)))
419         hildon_window_take_common_toolbar (HILDON_WINDOW (window));
420 }
421
422 /**
423  * hildon_program_get_instance:
424  *
425  * Return value: Returns the #HildonProgram for the current process.
426  * The object is created on the first call. Note that you're not supposed 
427  * to unref the returned object since it's not reffed in the first place.
428  **/
429 HildonProgram*
430 hildon_program_get_instance                     (void)
431 {
432     static HildonProgram *program = NULL;
433
434     if (! program)
435     {
436         program = g_object_new (HILDON_TYPE_PROGRAM, NULL);
437     }
438
439     return program;
440 }
441
442 /**
443  * hildon_program_add_window:
444  * @self: The #HildonProgram to which the window should be registered
445  * @window: A #HildonWindow to be added
446  *
447  * Registers a #HildonWindow as belonging to a given #HildonProgram. This
448  * allows to apply program-wide settings as all the registered windows,
449  * such as hildon_program_set_common_menu() and
450  * hildon_pogram_set_common_toolbar()
451  **/
452 void
453 hildon_program_add_window                       (HildonProgram *self, 
454                                                  HildonWindow *window)
455 {
456     HildonProgramPrivate *priv;
457     
458     g_return_if_fail (HILDON_IS_PROGRAM (self));
459     
460     priv = HILDON_PROGRAM_GET_PRIVATE (self);
461     g_assert (priv);
462
463     if (g_slist_find_custom (priv->windows, window,
464            hildon_program_window_list_compare) )
465     {
466         /* We already have that window */
467         return;
468     }
469
470     if (!priv->window_count)
471     {
472         hildon_program_update_top_most (self);
473         
474         /* Now that we have a window we should start keeping track of
475          * the root window */
476         gdk_window_set_events (gdk_get_default_root_window (),
477                 gdk_window_get_events (gdk_get_default_root_window ()) | GDK_PROPERTY_CHANGE_MASK);
478
479         gdk_window_add_filter (gdk_get_default_root_window (),
480                 hildon_program_root_window_event_filter, self );
481     }
482     
483     hildon_window_set_can_hibernate_property (window, &priv->killable);
484
485     hildon_window_set_program (window, G_OBJECT (self));
486
487     priv->windows = g_slist_append (priv->windows, window);
488     priv->window_count ++;
489 }
490
491 /**
492  * hildon_program_remove_window:
493  * @self: The #HildonProgram to which the window should be unregistered
494  * @window: The @HildonWindow to unregister
495  *
496  * Used to unregister a window from the program. Subsequent calls to
497  * hildon_program_set_common_menu() and hildon_pogram_set_common_toolbar()
498  * will not affect the window
499  **/
500 void
501 hildon_program_remove_window                    (HildonProgram *self, 
502                                                  HildonWindow *window)
503 {
504     HildonProgramPrivate *priv;
505     
506     g_return_if_fail (HILDON_IS_PROGRAM (self));
507     
508     priv = HILDON_PROGRAM_GET_PRIVATE (self);
509     g_assert (priv);
510     
511     hildon_window_unset_program (window);
512
513     priv->windows = g_slist_remove (priv->windows, window);
514
515     priv->window_count --;
516
517     if (! priv->window_count)
518         gdk_window_remove_filter (gdk_get_default_root_window(),
519                 hildon_program_root_window_event_filter,
520                 self);
521 }
522
523 /**
524  * hildon_program_set_can_hibernate:
525  * @self: The #HildonProgram which can hibernate or not
526  * @can_hibernate: whether or not the #HildonProgram can hibernate
527  *
528  * Used to set whether or not the Hildon task navigator should
529  * be able to set the program to hibernation in case of low memory
530  **/
531 void
532 hildon_program_set_can_hibernate                (HildonProgram *self, 
533                                                  gboolean can_hibernate)
534 {
535     HildonProgramPrivate *priv;
536     
537     g_return_if_fail (HILDON_IS_PROGRAM (self));
538     
539     priv = HILDON_PROGRAM_GET_PRIVATE (self);
540     g_assert (priv);
541
542     if (priv->killable != can_hibernate)
543     {
544         g_slist_foreach (priv->windows, 
545                 (GFunc) hildon_window_set_can_hibernate_property, &can_hibernate);
546     }
547
548     priv->killable = can_hibernate;
549 }
550
551 /**
552  * hildon_program_get_can_hibernate:
553  * @self: The #HildonProgram which can hibernate or not
554  * 
555  * Return value: Whether or not this #HildonProgram is set to be
556  * support hibernation from the Hildon task navigator
557  **/
558 gboolean
559 hildon_program_get_can_hibernate                (HildonProgram *self)
560 {
561     HildonProgramPrivate *priv;
562     
563     g_return_val_if_fail (HILDON_IS_PROGRAM (self), FALSE);
564    
565     priv = HILDON_PROGRAM_GET_PRIVATE (self);
566     g_assert (priv);
567
568     return priv->killable;
569 }
570
571 /**
572  * hildon_program_set_common_menu:
573  * @self: The #HildonProgram in which the common menu should be used
574  * @menu: A GtkMenu to use as common menu for the program
575  *
576  * Sets a GtkMenu that will appear in all the #HildonWindow registered
577  * with the #HildonProgram. Only one common GtkMenu can be set, further
578  * calls will detach the previous common GtkMenu. A #HildonWindow
579  * can use its own GtkMenu with hildon_window_set_menu()
580  *
581  * This method is not intented for #HildonStackableWindow<!-- -->s and
582  * does not support #HildonAppMenu objects. See
583  * hildon_program_set_common_app_menu() for that.
584  *
585  * Since: 2.2
586  **/
587 void
588 hildon_program_set_common_menu                  (HildonProgram *self, 
589                                                  GtkMenu *menu)
590 {
591     HildonProgramPrivate *priv;
592
593     g_return_if_fail (HILDON_IS_PROGRAM (self));
594
595     priv = HILDON_PROGRAM_GET_PRIVATE (self);
596     g_assert (priv);
597
598     if (priv->common_menu)
599     {
600         if (GTK_WIDGET_VISIBLE (priv->common_menu))
601         {
602             gtk_menu_popdown (GTK_MENU (priv->common_menu));
603             gtk_menu_shell_deactivate (GTK_MENU_SHELL (priv->common_menu));
604         }
605
606         if (gtk_menu_get_attach_widget (GTK_MENU (priv->common_menu)))
607         {
608             gtk_menu_detach (GTK_MENU (priv->common_menu));
609         }
610         else
611         {
612             g_object_unref (priv->common_menu);
613         }
614     }
615
616     priv->common_menu = GTK_WIDGET (menu);
617
618     if (priv->common_menu)
619     {
620         g_object_ref (menu);
621         gtk_object_sink (GTK_OBJECT (menu));
622         gtk_widget_show_all (GTK_WIDGET (menu));
623     }
624 }
625
626 /**
627  * hildon_program_get_common_menu:
628  * @self: The #HildonProgram from which to retrieve the common menu
629  *
630  * Return value: the GtkMenu that was set as common menu for this
631  * #HildonProgram, or %NULL of no common menu was set.
632  **/
633 GtkMenu*
634 hildon_program_get_common_menu                  (HildonProgram *self)
635 {
636     HildonProgramPrivate *priv;
637
638     g_return_val_if_fail (HILDON_IS_PROGRAM (self), NULL);
639
640     priv = HILDON_PROGRAM_GET_PRIVATE (self);
641     g_assert (priv);
642
643     return GTK_MENU (priv->common_menu);
644 }
645
646 /**
647  * hildon_program_set_common_app_menu:
648  * @self: The #HildonProgram in which the common menu should be used
649  * @menu: A #HildonAppMenu to use as common menu for the program
650  *
651  * Sets a #HildonAppMenu that will appear in all the
652  * #HildonStackableWindow<!-- -->s registered with the
653  * #HildonProgram. Only one common #HildonAppMenu can be set, further
654  * calls will detach the previous common #HildonAppMenu. A
655  * #HildonStackableWindow can use its own #HildonAppMenu with
656  * hildon_stackable_window_set_main_menu()
657  *
658  * This method is not intented for standard #HildonWindow<!-- -->s and
659  * does not support #GtkMenu objects. See
660  * hildon_program_set_common_menu() for that.
661  *
662  * Since: 2.2
663  **/
664 void
665 hildon_program_set_common_app_menu              (HildonProgram *self,
666                                                  HildonAppMenu *menu)
667 {
668     HildonProgramPrivate *priv;
669     GtkWidget *old_menu;
670
671     g_return_if_fail (HILDON_IS_PROGRAM (self));
672     g_return_if_fail (menu == NULL || HILDON_IS_APP_MENU (menu));
673
674     priv = HILDON_PROGRAM_GET_PRIVATE (self);
675     g_assert (priv);
676
677     old_menu = priv->common_app_menu;
678
679     /* Set new menu */
680     priv->common_app_menu = GTK_WIDGET (menu);
681     if (menu)
682         g_object_ref_sink (menu);
683
684     /* Hide and unref old menu */
685     if (old_menu) {
686         hildon_app_menu_set_parent_window (HILDON_APP_MENU (old_menu), NULL);
687         g_object_unref (old_menu);
688     }
689 }
690
691 /**
692  * hildon_program_get_common_app_menu:
693  * @self: The #HildonProgram from which to retrieve the common app menu
694  *
695  * Return value: the #HildonAppMenu that was set as common menu for this
696  * #HildonProgram, or %NULL of no common app menu was set.
697  *
698  * Since: 2.2
699  **/
700 HildonAppMenu*
701 hildon_program_get_common_app_menu              (HildonProgram *self)
702 {
703     HildonProgramPrivate *priv;
704
705     g_return_val_if_fail (HILDON_IS_PROGRAM (self), NULL);
706
707     priv = HILDON_PROGRAM_GET_PRIVATE (self);
708     g_assert (priv);
709
710     return HILDON_APP_MENU (priv->common_app_menu);
711 }
712
713 /**
714  * hildon_program_set_common_toolbar:
715  * @self: The #HildonProgram in which the common toolbar should be used
716  * @toolbar: A GtkToolbar to use as common toolbar for the program
717  *
718  * Sets a GtkToolbar that will appear in all the #HildonWindow registered
719  * to the #HildonProgram. Only one common GtkToolbar can be set, further
720  * call will detach the previous common GtkToolbar. A #HildonWindow
721  * can use its own GtkToolbar with hildon_window_add_toolbar(). Both
722  * #HildonProgram and #HildonWindow specific toolbars will be shown
723  **/
724 void
725 hildon_program_set_common_toolbar               (HildonProgram *self, 
726                                                  GtkToolbar *toolbar)
727 {
728     HildonProgramPrivate *priv;
729
730     g_return_if_fail (HILDON_IS_PROGRAM (self));
731
732     priv = HILDON_PROGRAM_GET_PRIVATE (self);
733     g_assert (priv);
734
735     if (priv->common_toolbar)
736     {
737         if (priv->common_toolbar->parent)
738         {
739             gtk_container_remove (GTK_CONTAINER (priv->common_toolbar->parent), 
740                                   priv->common_toolbar);
741         }
742         
743         g_object_unref (priv->common_toolbar);
744     }
745
746     priv->common_toolbar = GTK_WIDGET (toolbar);
747
748     if (priv->common_toolbar)
749     {
750         g_object_ref (priv->common_toolbar);
751         gtk_object_sink (GTK_OBJECT (priv->common_toolbar) );
752     }
753
754     /* if the program is the topmost we have to update the common
755        toolbar right now for the topmost window */
756     if (priv->is_topmost)
757       {
758         g_slist_foreach (priv->windows, 
759                          (GFunc) hildon_program_common_toolbar_topmost_window, NULL);
760       }
761 }
762
763 /**
764  * hildon_program_get_common_toolbar:
765  * @self: The #HildonProgram from which to retrieve the common toolbar
766  *
767  * Return value: the GtkToolbar that was set as common toolbar for this
768  * #HildonProgram, or %NULL of no common menu was set.
769  **/
770 GtkToolbar*
771 hildon_program_get_common_toolbar               (HildonProgram *self)
772 {
773     HildonProgramPrivate *priv;
774
775     g_return_val_if_fail (HILDON_IS_PROGRAM (self), NULL);
776
777     priv = HILDON_PROGRAM_GET_PRIVATE (self);
778     g_assert (priv);
779
780     return priv->common_toolbar ? GTK_TOOLBAR (priv->common_toolbar) : NULL;
781 }
782
783 /**
784  * hildon_program_get_is_topmost:
785  * @self: A #HildonWindow
786  *
787  * Return value: Whether or not one of the program's window or dialog is 
788  * currenltly activated by the window manager.
789  **/
790 gboolean
791 hildon_program_get_is_topmost                   (HildonProgram *self)
792 {
793     HildonProgramPrivate *priv;
794
795     g_return_val_if_fail (HILDON_IS_PROGRAM (self), FALSE);
796     
797     priv = HILDON_PROGRAM_GET_PRIVATE (self);
798     g_assert (priv);
799
800     return priv->is_topmost;
801 }
802
803 /**
804  * hildon_program_go_to_root_window:
805  * @self: A #HildonProgram
806  *
807  * Goes to the root window of the stack.
808  *
809  * Deprecated: See #HildonWindowStack
810  */
811 void
812 hildon_program_go_to_root_window                (HildonProgram *self)
813 {
814     HildonWindowStack *stack = hildon_window_stack_get_default ();
815     gint n = hildon_window_stack_size (stack);
816     g_warning ("%s: this function is deprecated. Use hildon_window_stack_pop() instead.", __FUNCTION__);
817     if (n > 1) {
818         hildon_window_stack_pop (stack, n-1, NULL);
819     }
820 }