summaryrefslogtreecommitdiff
path: root/src/core/core.c
blob: ed46f7087fcd5efa312d8da1006a693941115f0c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */

/* Marco interface used by GTK+ UI to talk to core */

/* 
 * Copyright (C) 2001 Havoc Pennington
 * Copyright (C) 2003 Rob Adams
 * Copyright (C) 2004-2006 Elijah Newren
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#include <config.h>
#include "core.h"
#include "frame-private.h"
#include "workspace.h"
#include "prefs.h"

/* Looks up the MetaWindow representing the frame of the given X window.
 * Used as a helper function by a bunch of the functions below.
 *
 * FIXME: The functions that use this function throw the result away
 * after use. Many of these functions tend to be called in small groups,
 * which results in get_window() getting called several times in succession
 * with the same parameters. We should profile to see whether this wastes
 * much time, and if it does we should look into a generalised
 * meta_core_get_window_info() which takes a bunch of pointers to variables
 * to put its results in, and only fills in the non-null ones.
 */
static MetaWindow *
get_window (Display *xdisplay,
            Window   frame_xwindow)
{
  MetaDisplay *display;
  MetaWindow *window;
  
  display = meta_display_for_x_display (xdisplay);
  window = meta_display_lookup_x_window (display, frame_xwindow);

  if (window == NULL || window->frame == NULL)
    {
      meta_bug ("No such frame window 0x%lx!\n", frame_xwindow);
      return NULL;
    }

  return window;
}

void
meta_core_get (Display *xdisplay,
    Window xwindow,
    ...)
{
  va_list args;
  MetaCoreGetType request;

  MetaDisplay *display = meta_display_for_x_display (xdisplay);
  MetaWindow *window = meta_display_lookup_x_window (display, xwindow);

  va_start (args, xwindow);

  request = va_arg (args, MetaCoreGetType);

  /* Now, we special-case the first request slightly. Mostly, requests
   * for information on windows which have no frame are errors.
   * But sometimes we may want to know *whether* a window has a frame.
   * In this case, pass the key META_CORE_WINDOW_HAS_FRAME
   * as the *first* request, with a pointer to a boolean; if the window
   * has no frame, this will be set to False and meta_core_get will
   * exit immediately (so the values of any other requests will be
   * undefined). Otherwise it will be set to True and meta_core_get will
   * continue happily on its way.
   */

  if (request != META_CORE_WINDOW_HAS_FRAME &&
      (window == NULL || window->frame == NULL)) {
    meta_bug ("No such frame window 0x%lx!\n", xwindow);
    return;
  }

  while (request != META_CORE_GET_END) {
    
    gpointer answer = va_arg (args, gpointer);

    switch (request) {
      case META_CORE_WINDOW_HAS_FRAME:
        *((gboolean*)answer) = window != NULL && window->frame != NULL;
        if (!*((gboolean*)answer)) return; /* see above */
        break; 
      case META_CORE_GET_CLIENT_WIDTH:
        *((gint*)answer) = window->rect.width;
        break;
      case META_CORE_GET_CLIENT_HEIGHT:
        *((gint*)answer) = window->rect.height;
        break;
      case META_CORE_IS_TITLEBAR_ONSCREEN:
        *((gboolean*)answer) = meta_window_titlebar_is_onscreen (window);
        break;
      case META_CORE_GET_CLIENT_XWINDOW:
        *((Window*)answer) = window->xwindow;
        break;
      case META_CORE_GET_FRAME_FLAGS:
        *((MetaFrameFlags*)answer) = meta_frame_get_flags (window->frame);
        break; 
      case META_CORE_GET_FRAME_TYPE:
          {
          MetaFrameType base_type = META_FRAME_TYPE_LAST;

          switch (window->type)
            {
            case META_WINDOW_NORMAL:
              base_type = META_FRAME_TYPE_NORMAL;
              break;

            case META_WINDOW_DIALOG:
              base_type = META_FRAME_TYPE_DIALOG;
              break;

            case META_WINDOW_MODAL_DIALOG:
              base_type = META_FRAME_TYPE_MODAL_DIALOG;
              break;

            case META_WINDOW_MENU:
              base_type = META_FRAME_TYPE_MENU;
              break;

            case META_WINDOW_UTILITY:
              base_type = META_FRAME_TYPE_UTILITY;
              break;

            case META_WINDOW_DESKTOP:
            case META_WINDOW_DOCK:
            case META_WINDOW_TOOLBAR:
            case META_WINDOW_SPLASHSCREEN:
              /* No frame */
              base_type = META_FRAME_TYPE_LAST;
              break;

            }

          if (base_type == META_FRAME_TYPE_LAST)
            {
              /* can't add border if undecorated */
              *((MetaFrameType*)answer) = META_FRAME_TYPE_LAST; 
            }
          else if (window->border_only)
            {
              /* override base frame type */
              *((MetaFrameType*)answer) = META_FRAME_TYPE_BORDER; 
            }
          else
            {
              *((MetaFrameType*)answer) = base_type;
            }

          break; 
          }
      case META_CORE_GET_MINI_ICON:
        *((GdkPixbuf**)answer) = window->mini_icon;
        break;
      case META_CORE_GET_ICON:
        *((GdkPixbuf**)answer) = window->icon;
        break;
      case META_CORE_GET_X:
        meta_window_get_position (window, (int*)answer, NULL);
        break;
      case META_CORE_GET_Y:
        meta_window_get_position (window, NULL, (int*)answer);
        break;
      case META_CORE_GET_FRAME_WORKSPACE:
        *((gint*)answer) = meta_window_get_net_wm_desktop (window);
        break;
      case META_CORE_GET_FRAME_X:
        *((gint*)answer) = window->frame->rect.x;
        break;
      case META_CORE_GET_FRAME_Y:
        *((gint*)answer) = window->frame->rect.y;
        break;
      case META_CORE_GET_FRAME_WIDTH:
        *((gint*)answer) = window->frame->rect.width;
        break;
      case META_CORE_GET_FRAME_HEIGHT:
        *((gint*)answer) = window->frame->rect.height;
        break;
      case META_CORE_GET_SCREEN_WIDTH:
        *((gint*)answer) = window->screen->rect.width;
        break;
      case META_CORE_GET_SCREEN_HEIGHT:
        *((gint*)answer) = window->screen->rect.height;
        break;

      default:
        meta_warning(_("Unknown window information request: %d"), request);
    }

    request = va_arg (args, MetaCoreGetType);
  } 

  va_end (args);
}

void
meta_core_queue_frame_resize (Display *xdisplay,
                              Window   frame_xwindow)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  meta_window_queue (window, META_QUEUE_MOVE_RESIZE);
}

void
meta_core_user_move (Display *xdisplay,
                     Window   frame_xwindow,
                     int      x,
                     int      y)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  meta_window_move (window, TRUE, x, y);
}

void
meta_core_user_resize  (Display *xdisplay,
                        Window   frame_xwindow,
                        int      gravity,
                        int      width,
                        int      height)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  meta_window_resize_with_gravity (window, TRUE, width, height, gravity);
}

void
meta_core_user_raise (Display *xdisplay,
                      Window   frame_xwindow)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);
  
  meta_window_raise (window);
}

void
meta_core_user_lower_and_unfocus (Display *xdisplay,
                                  Window   frame_xwindow,
                                  guint32  timestamp)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);
  
  meta_window_lower (window);

  if (meta_prefs_get_focus_mode () == META_FOCUS_MODE_CLICK &&
      meta_prefs_get_raise_on_click ())
    {
      /* Move window to the back of the focusing workspace's MRU list.
       * Do extra sanity checks to avoid possible race conditions.
       * (Borrowed from window.c.)
       */
      if (window->screen->active_workspace &&
          meta_window_located_on_workspace (window, 
                                            window->screen->active_workspace))
        {
          GList* link;
          link = g_list_find (window->screen->active_workspace->mru_list, 
                              window);
          g_assert (link);

          window->screen->active_workspace->mru_list = 
            g_list_remove_link (window->screen->active_workspace->mru_list,
                                link);
          g_list_free (link);

          window->screen->active_workspace->mru_list = 
            g_list_append (window->screen->active_workspace->mru_list, 
                           window);
        }
    }

  /* focus the default window, if needed */
  if (window->has_focus)
    meta_workspace_focus_default_window (window->screen->active_workspace,
                                         NULL,
                                         timestamp);
}

void
meta_core_user_focus (Display *xdisplay,
                      Window   frame_xwindow,
                      guint32  timestamp)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);
  
  meta_window_focus (window, timestamp);
}

void
meta_core_minimize (Display *xdisplay,
                    Window   frame_xwindow)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  meta_window_minimize (window);
}

void
meta_core_maximize (Display *xdisplay,
                    Window   frame_xwindow)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  if (meta_prefs_get_raise_on_click ())
    meta_window_raise (window);

  meta_window_maximize (window, 
                        META_MAXIMIZE_HORIZONTAL | META_MAXIMIZE_VERTICAL);
}

void
meta_core_toggle_maximize_vertically (Display *xdisplay,
				      Window   frame_xwindow)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  if (meta_prefs_get_raise_on_click ())
    meta_window_raise (window);

  if (META_WINDOW_MAXIMIZED_VERTICALLY (window))
    meta_window_unmaximize (window, 
                            META_MAXIMIZE_VERTICAL);
  else
    meta_window_maximize (window,
    			    META_MAXIMIZE_VERTICAL);
}

void
meta_core_toggle_maximize_horizontally (Display *xdisplay,
				        Window   frame_xwindow)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  if (meta_prefs_get_raise_on_click ())
    meta_window_raise (window);

  if (META_WINDOW_MAXIMIZED_HORIZONTALLY (window))
    meta_window_unmaximize (window, 
                            META_MAXIMIZE_HORIZONTAL);
  else
    meta_window_maximize (window,
    			    META_MAXIMIZE_HORIZONTAL);
}

void
meta_core_toggle_maximize (Display *xdisplay,
                           Window   frame_xwindow)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  if (meta_prefs_get_raise_on_click ())
    meta_window_raise (window);

  if (META_WINDOW_MAXIMIZED (window))
    meta_window_unmaximize (window, 
                            META_MAXIMIZE_HORIZONTAL | META_MAXIMIZE_VERTICAL);
  else
    meta_window_maximize (window,
                          META_MAXIMIZE_HORIZONTAL | META_MAXIMIZE_VERTICAL);
}

void
meta_core_unmaximize (Display *xdisplay,
                      Window   frame_xwindow)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  if (meta_prefs_get_raise_on_click ())
    meta_window_raise (window);

  meta_window_unmaximize (window,
                          META_MAXIMIZE_HORIZONTAL | META_MAXIMIZE_VERTICAL);
}

void
meta_core_delete (Display *xdisplay,
                  Window   frame_xwindow,
                  guint32  timestamp)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);
     
  meta_window_delete (window, timestamp);
}

void
meta_core_unshade (Display *xdisplay,
                   Window   frame_xwindow,
                   guint32  timestamp)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  meta_window_unshade (window, timestamp);
}

void
meta_core_shade (Display *xdisplay,
                 Window   frame_xwindow,
                 guint32  timestamp)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);
  
  meta_window_shade (window, timestamp);
}

void
meta_core_unstick (Display *xdisplay,
                   Window   frame_xwindow)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  meta_window_unstick (window);
}

void
meta_core_make_above (Display *xdisplay,
                      Window   frame_xwindow)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  meta_window_make_above (window);
}

void
meta_core_unmake_above (Display *xdisplay,
                        Window   frame_xwindow)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  meta_window_unmake_above (window);
}

void
meta_core_stick (Display *xdisplay,
                 Window   frame_xwindow)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  meta_window_stick (window);
}

void
meta_core_change_workspace (Display *xdisplay,
                            Window   frame_xwindow,
                            int      new_workspace)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  meta_window_change_workspace (window,
                                meta_screen_get_workspace_by_index (window->screen,
                                                                    new_workspace));
}

int
meta_core_get_num_workspaces (Screen  *xscreen)
{
  MetaScreen *screen;

  screen = meta_screen_for_x_screen (xscreen);

  return meta_screen_get_n_workspaces (screen);
}

int
meta_core_get_active_workspace (Screen *xscreen)
{
  MetaScreen *screen;

  screen = meta_screen_for_x_screen (xscreen);

  return meta_workspace_index (screen->active_workspace);
}

void
meta_core_show_window_menu (Display *xdisplay,
                            Window   frame_xwindow,
                            int      root_x,
                            int      root_y,
                            int      button,
                            guint32  timestamp)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);
  
  if (meta_prefs_get_raise_on_click ())
    meta_window_raise (window);
  meta_window_focus (window, timestamp);

  meta_window_show_menu (window, root_x, root_y, button, timestamp);
}

void
meta_core_get_menu_accelerator (MetaMenuOp           menu_op,
                                int                  workspace,
                                unsigned int        *keysym,
                                MetaVirtualModifier *modifiers)
{
  const char *name;

  name = NULL;
  
  switch (menu_op)
    {
    case META_MENU_OP_NONE:
      /* No keybinding for this one */
      break;
    case META_MENU_OP_DELETE:
      name = "close";
      break;
    case META_MENU_OP_MINIMIZE:
      name = "minimize";
      break;
    case META_MENU_OP_UNMAXIMIZE:
      name = "unmaximize";
      break;
    case META_MENU_OP_MAXIMIZE:
      name = "maximize";
      break;
    case META_MENU_OP_UNSHADE:
    case META_MENU_OP_SHADE:
      name = "toggle-shaded";
      break;
    case META_MENU_OP_UNSTICK:
    case META_MENU_OP_STICK:
      name = "toggle-on-all-workspaces";
      break;
    case META_MENU_OP_ABOVE:
    case META_MENU_OP_UNABOVE:
      name = "toggle-above";
      break;
    case META_MENU_OP_WORKSPACES:
      switch (workspace)
        {
        case 1:
          name = "move-to-workspace-1";
          break;
        case 2:
          name = "move-to-workspace-2";
          break;
        case 3:
          name = "move-to-workspace-3";
          break; 
        case 4:
          name = "move-to-workspace-4";
          break; 
        case 5:
          name = "move-to-workspace-5";
          break; 
        case 6:
          name = "move-to-workspace-6";
          break; 
        case 7:
          name = "move-to-workspace-7";
          break; 
        case 8:
          name = "move-to-workspace-8";
          break; 
        case 9:
          name = "move-to-workspace-9";
          break; 
        case 10:
          name = "move-to-workspace-10";
          break;
        case 11:
          name = "move-to-workspace-11";
          break;
        case 12:
          name = "move-to-workspace-12";
          break;
        }
      break;
    case META_MENU_OP_MOVE:
      name = "begin-move";
      break;
    case META_MENU_OP_RESIZE:
      name = "begin-resize";
      break;
    case META_MENU_OP_MOVE_LEFT:
      name = "move-to-workspace-left";
      break;
    case META_MENU_OP_MOVE_RIGHT:
      name = "move-to-workspace-right";
      break;
    case META_MENU_OP_MOVE_UP:
      name = "move-to-workspace-up";
      break;
    case META_MENU_OP_MOVE_DOWN:
      name = "move-to-workspace-down";
      break;
    case META_MENU_OP_RECOVER:
      /* No keybinding for this one */
      break;
    }

  if (name)
    {
      meta_prefs_get_window_binding (name, keysym, modifiers);
    }
  else
    {
      *keysym = 0;
      *modifiers = 0;
    }
}

const char*
meta_core_get_workspace_name_with_index (Display *xdisplay,
                                         Window   xroot,
                                         int      index)
{
  MetaDisplay *display;
  MetaScreen *screen;
  MetaWorkspace *workspace;

  display = meta_display_for_x_display (xdisplay);
  screen = meta_display_screen_for_root (display, xroot);
  g_assert (screen != NULL);
  workspace = meta_screen_get_workspace_by_index (screen, index);
  return workspace ? meta_workspace_get_name (workspace) : NULL;
}

gboolean
meta_core_begin_grab_op (Display    *xdisplay,
                         Window      frame_xwindow,
                         MetaGrabOp  op,
                         gboolean    pointer_already_grabbed,
                         gboolean    frame_action,
                         int         button,
                         gulong      modmask,
                         guint32     timestamp,
                         int         root_x,
                         int         root_y)
{
  MetaWindow *window = get_window (xdisplay, frame_xwindow);
  MetaDisplay *display;
  MetaScreen *screen;
  
  display = meta_display_for_x_display (xdisplay);
  screen = meta_display_screen_for_xwindow (display, frame_xwindow);

  g_assert (screen != NULL);
  
  return meta_display_begin_grab_op (display, screen, window,
                                     op, pointer_already_grabbed,
                                     frame_action,
                                     button, modmask,
                                     timestamp, root_x, root_y);
}

void
meta_core_end_grab_op (Display *xdisplay,
                       guint32  timestamp)
{
  MetaDisplay *display;
  
  display = meta_display_for_x_display (xdisplay);

  meta_display_end_grab_op (display, timestamp);
}

MetaGrabOp
meta_core_get_grab_op (Display *xdisplay)
{
  MetaDisplay *display;
  
  display = meta_display_for_x_display (xdisplay);

  return display->grab_op;
}

Window
meta_core_get_grab_frame (Display *xdisplay)
{
  MetaDisplay *display;
  
  display = meta_display_for_x_display (xdisplay);

  g_assert (display != NULL);
  g_assert (display->grab_op == META_GRAB_OP_NONE || 
            display->grab_screen != NULL);
  g_assert (display->grab_op == META_GRAB_OP_NONE ||
            display->grab_screen->display->xdisplay == xdisplay);
  
  if (display->grab_op != META_GRAB_OP_NONE &&
      display->grab_window &&
      display->grab_window->frame)
    return display->grab_window->frame->xwindow;
  else
    return None;
}

int
meta_core_get_grab_button (Display  *xdisplay)
{
  MetaDisplay *display;
  
  display = meta_display_for_x_display (xdisplay);

  if (display->grab_op == META_GRAB_OP_NONE)
    return -1;
  
  return display->grab_button;
}

void
meta_core_grab_buttons  (Display *xdisplay,
                         Window   frame_xwindow)
{
  MetaDisplay *display;
    
  display = meta_display_for_x_display (xdisplay);

  meta_verbose ("Grabbing buttons on frame 0x%lx\n", frame_xwindow);
  meta_display_grab_window_buttons (display, frame_xwindow);
}

void
meta_core_set_screen_cursor (Display *xdisplay,
                             Window   frame_on_screen,
                             MetaCursor cursor)
{
  MetaWindow *window = get_window (xdisplay, frame_on_screen);

  meta_frame_set_screen_cursor (window->frame, cursor);
}

void
meta_core_increment_event_serial (Display *xdisplay)
{
  MetaDisplay *display;
  
  display = meta_display_for_x_display (xdisplay);

  meta_display_increment_event_serial (display);
}

void
meta_invalidate_default_icons (void)
{
  MetaDisplay *display = meta_get_display ();
  GSList *windows;
  GSList *l;

  if (display == NULL)
    return; /* We can validly be called before the display is opened. */

  windows = meta_display_list_windows (display);
  for (l = windows; l != NULL; l = l->next)
    {
      MetaWindow *window = (MetaWindow*)l->data;

      if (window->icon_cache.origin == USING_FALLBACK_ICON)
        {
          meta_icon_cache_free (&(window->icon_cache));
          meta_window_update_icon_now (window);
        }
    }

  g_slist_free (windows);
}