summaryrefslogtreecommitdiff
path: root/src/eggaccelerators.c
blob: 570826bcb91739fb739aa3f101f010c175b69ff7 (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
/* eggaccelerators.c
 * Copyright (C) 2002  Red Hat, Inc.; Copyright 1998, 2001 Tim Janik
 * Developed by Havoc Pennington, Tim Janik
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include "eggaccelerators.h"

#include <string.h>
#include <gdk/gdkx.h>
#include <gdk/gdkkeysyms.h>

enum
{
  EGG_MODMAP_ENTRY_SHIFT   = 0,
  EGG_MODMAP_ENTRY_LOCK    = 1,
  EGG_MODMAP_ENTRY_CONTROL = 2,
  EGG_MODMAP_ENTRY_MOD1    = 3,
  EGG_MODMAP_ENTRY_MOD2    = 4,
  EGG_MODMAP_ENTRY_MOD3    = 5,
  EGG_MODMAP_ENTRY_MOD4    = 6,
  EGG_MODMAP_ENTRY_MOD5    = 7,
  EGG_MODMAP_ENTRY_LAST    = 8
};

#define MODMAP_ENTRY_TO_MODIFIER(x) (1 << (x))

typedef struct
{
  EggVirtualModifierType mapping[EGG_MODMAP_ENTRY_LAST];

} EggModmap;

const EggModmap* egg_keymap_get_modmap (GdkKeymap *keymap);

static inline gboolean
is_alt (const gchar *string)
{
  return ((string[0] == '<') &&
	  (string[1] == 'a' || string[1] == 'A') &&
	  (string[2] == 'l' || string[2] == 'L') &&
	  (string[3] == 't' || string[3] == 'T') &&
	  (string[4] == '>'));
}

static inline gboolean
is_ctl (const gchar *string)
{
  return ((string[0] == '<') &&
	  (string[1] == 'c' || string[1] == 'C') &&
	  (string[2] == 't' || string[2] == 'T') &&
	  (string[3] == 'l' || string[3] == 'L') &&
	  (string[4] == '>'));
}

static inline gboolean
is_modx (const gchar *string)
{
  return ((string[0] == '<') &&
	  (string[1] == 'm' || string[1] == 'M') &&
	  (string[2] == 'o' || string[2] == 'O') &&
	  (string[3] == 'd' || string[3] == 'D') &&
	  (string[4] >= '1' && string[4] <= '5') &&
	  (string[5] == '>'));
}

static inline gboolean
is_ctrl (const gchar *string)
{
  return ((string[0] == '<') &&
	  (string[1] == 'c' || string[1] == 'C') &&
	  (string[2] == 't' || string[2] == 'T') &&
	  (string[3] == 'r' || string[3] == 'R') &&
	  (string[4] == 'l' || string[4] == 'L') &&
	  (string[5] == '>'));
}

static inline gboolean
is_shft (const gchar *string)
{
  return ((string[0] == '<') &&
	  (string[1] == 's' || string[1] == 'S') &&
	  (string[2] == 'h' || string[2] == 'H') &&
	  (string[3] == 'f' || string[3] == 'F') &&
	  (string[4] == 't' || string[4] == 'T') &&
	  (string[5] == '>'));
}

static inline gboolean
is_shift (const gchar *string)
{
  return ((string[0] == '<') &&
	  (string[1] == 's' || string[1] == 'S') &&
	  (string[2] == 'h' || string[2] == 'H') &&
	  (string[3] == 'i' || string[3] == 'I') &&
	  (string[4] == 'f' || string[4] == 'F') &&
	  (string[5] == 't' || string[5] == 'T') &&
	  (string[6] == '>'));
}

static inline gboolean
is_control (const gchar *string)
{
  return ((string[0] == '<') &&
	  (string[1] == 'c' || string[1] == 'C') &&
	  (string[2] == 'o' || string[2] == 'O') &&
	  (string[3] == 'n' || string[3] == 'N') &&
	  (string[4] == 't' || string[4] == 'T') &&
	  (string[5] == 'r' || string[5] == 'R') &&
	  (string[6] == 'o' || string[6] == 'O') &&
	  (string[7] == 'l' || string[7] == 'L') &&
	  (string[8] == '>'));
}

static inline gboolean
is_release (const gchar *string)
{
  return ((string[0] == '<') &&
	  (string[1] == 'r' || string[1] == 'R') &&
	  (string[2] == 'e' || string[2] == 'E') &&
	  (string[3] == 'l' || string[3] == 'L') &&
	  (string[4] == 'e' || string[4] == 'E') &&
	  (string[5] == 'a' || string[5] == 'A') &&
	  (string[6] == 's' || string[6] == 'S') &&
	  (string[7] == 'e' || string[7] == 'E') &&
	  (string[8] == '>'));
}

static inline gboolean
is_meta (const gchar *string)
{
  return ((string[0] == '<') &&
	  (string[1] == 'm' || string[1] == 'M') &&
	  (string[2] == 'e' || string[2] == 'E') &&
	  (string[3] == 't' || string[3] == 'T') &&
	  (string[4] == 'a' || string[4] == 'A') &&
	  (string[8] == '>'));
}

static inline gboolean
is_super (const gchar *string)
{
  return ((string[0] == '<') &&
	  (string[1] == 's' || string[1] == 'S') &&
	  (string[2] == 'u' || string[2] == 'U') &&
	  (string[3] == 'p' || string[3] == 'P') &&
	  (string[4] == 'e' || string[4] == 'E') &&
	  (string[5] == 'r' || string[5] == 'R') &&
	  (string[8] == '>'));
}

static inline gboolean
is_hyper (const gchar *string)
{
  return ((string[0] == '<') &&
	  (string[1] == 'h' || string[1] == 'H') &&
	  (string[2] == 'y' || string[2] == 'Y') &&
	  (string[3] == 'p' || string[3] == 'P') &&
	  (string[4] == 'e' || string[4] == 'E') &&
	  (string[5] == 'r' || string[5] == 'R') &&
	  (string[8] == '>'));
}

/**
 * egg_accelerator_parse_virtual:
 * @accelerator:      string representing an accelerator
 * @accelerator_key:  return location for accelerator keyval
 * @accelerator_mods: return location for accelerator modifier mask
 *
 * Parses a string representing a virtual accelerator. The format
 * looks like "&lt;Control&gt;a" or "&lt;Shift&gt;&lt;Alt&gt;F1" or
 * "&lt;Release&gt;z" (the last one is for key release).  The parser
 * is fairly liberal and allows lower or upper case, and also
 * abbreviations such as "&lt;Ctl&gt;" and "&lt;Ctrl&gt;".
 *
 * If the parse fails, @accelerator_key and @accelerator_mods will
 * be set to 0 (zero) and %FALSE will be returned. If the string contains
 * only modifiers, @accelerator_key will be set to 0 but %TRUE will be
 * returned.
 *
 * The virtual vs. concrete accelerator distinction is a relic of
 * how the X Window System works; there are modifiers Mod2-Mod5 that
 * can represent various keyboard keys (numlock, meta, hyper, etc.),
 * the virtual modifier represents the keyboard key, the concrete
 * modifier the actual Mod2-Mod5 bits in the key press event.
 * 
 * Returns: %TRUE on success.
 */
gboolean
egg_accelerator_parse_virtual (const gchar            *accelerator,
                               guint                  *accelerator_key,
                               EggVirtualModifierType *accelerator_mods)
{
  guint keyval;
  GdkModifierType mods;
  gint len;
  gboolean bad_keyval;
  
  if (accelerator_key)
    *accelerator_key = 0;
  if (accelerator_mods)
    *accelerator_mods = 0;

  g_return_val_if_fail (accelerator != NULL, FALSE);

  bad_keyval = FALSE;
  
  keyval = 0;
  mods = 0;
  len = strlen (accelerator);
  while (len)
    {
      if (*accelerator == '<')
	{
	  if (len >= 9 && is_release (accelerator))
	    {
	      accelerator += 9;
	      len -= 9;
	      mods |= EGG_VIRTUAL_RELEASE_MASK;
	    }
	  else if (len >= 9 && is_control (accelerator))
	    {
	      accelerator += 9;
	      len -= 9;
	      mods |= EGG_VIRTUAL_CONTROL_MASK;
	    }
	  else if (len >= 7 && is_shift (accelerator))
	    {
	      accelerator += 7;
	      len -= 7;
	      mods |= EGG_VIRTUAL_SHIFT_MASK;
	    }
	  else if (len >= 6 && is_shft (accelerator))
	    {
	      accelerator += 6;
	      len -= 6;
	      mods |= EGG_VIRTUAL_SHIFT_MASK;
	    }
	  else if (len >= 6 && is_ctrl (accelerator))
	    {
	      accelerator += 6;
	      len -= 6;
	      mods |= EGG_VIRTUAL_CONTROL_MASK;
	    }
	  else if (len >= 6 && is_modx (accelerator))
	    {
	      static const guint mod_vals[] = {
		EGG_VIRTUAL_ALT_MASK, EGG_VIRTUAL_MOD2_MASK, EGG_VIRTUAL_MOD3_MASK,
		EGG_VIRTUAL_MOD4_MASK, EGG_VIRTUAL_MOD5_MASK
	      };

	      len -= 6;
	      accelerator += 4;
	      mods |= mod_vals[*accelerator - '1'];
	      accelerator += 2;
	    }
	  else if (len >= 5 && is_ctl (accelerator))
	    {
	      accelerator += 5;
	      len -= 5;
	      mods |= EGG_VIRTUAL_CONTROL_MASK;
	    }
	  else if (len >= 5 && is_alt (accelerator))
	    {
	      accelerator += 5;
	      len -= 5;
	      mods |= EGG_VIRTUAL_ALT_MASK;
	    }
          else if (len >= 6 && is_meta (accelerator))
	    {
	      accelerator += 6;
	      len -= 6;
	      mods |= EGG_VIRTUAL_META_MASK;
	    }
          else if (len >= 7 && is_hyper (accelerator))
	    {
	      accelerator += 7;
	      len -= 7;
	      mods |= EGG_VIRTUAL_HYPER_MASK;
	    }
          else if (len >= 7 && is_super (accelerator))
	    {
	      accelerator += 7;
	      len -= 7;
	      mods |= EGG_VIRTUAL_SUPER_MASK;
	    }
	  else
	    {
	      gchar last_ch;
	      
	      last_ch = *accelerator;
	      while (last_ch && last_ch != '>')
		{
		  last_ch = *accelerator;
		  accelerator += 1;
		  len -= 1;
		}
	    }
	}
      else
	{
          keyval = gdk_keyval_from_name (accelerator);
          
          if (keyval == 0)
            bad_keyval = TRUE;
          
          accelerator += len;
          len -= len;              
	}
    }
  
  if (accelerator_key)
    *accelerator_key = gdk_keyval_to_lower (keyval);
  if (accelerator_mods)
    *accelerator_mods = mods;

  return !bad_keyval;
}


/**
 * egg_virtual_accelerator_name:
 * @accelerator_key:  accelerator keyval
 * @accelerator_mods: accelerator modifier mask
 * @returns:          a newly-allocated accelerator name
 * 
 * Converts an accelerator keyval and modifier mask
 * into a string parseable by egg_accelerator_parse_virtual().
 * For example, if you pass in #GDK_q and #EGG_VIRTUAL_CONTROL_MASK,
 * this function returns "&lt;Control&gt;q".
 *
 * The caller of this function must free the returned string.
 */
gchar*
egg_virtual_accelerator_name (guint                  accelerator_key,
                              EggVirtualModifierType accelerator_mods)
{
  static const gchar text_release[] = "<Release>";
  static const gchar text_shift[] = "<Shift>";
  static const gchar text_control[] = "<Control>";
  static const gchar text_mod1[] = "<Alt>";
  static const gchar text_mod2[] = "<Mod2>";
  static const gchar text_mod3[] = "<Mod3>";
  static const gchar text_mod4[] = "<Mod4>";
  static const gchar text_mod5[] = "<Mod5>";
  static const gchar text_meta[] = "<Meta>";
  static const gchar text_super[] = "<Super>";
  static const gchar text_hyper[] = "<Hyper>";
  guint l;
  gchar *keyval_name;
  gchar *accelerator;

  accelerator_mods &= EGG_VIRTUAL_MODIFIER_MASK;

  keyval_name = gdk_keyval_name (gdk_keyval_to_lower (accelerator_key));
  if (!keyval_name)
    keyval_name = "";

  l = 0;
  if (accelerator_mods & EGG_VIRTUAL_RELEASE_MASK)
    l += sizeof (text_release) - 1;
  if (accelerator_mods & EGG_VIRTUAL_SHIFT_MASK)
    l += sizeof (text_shift) - 1;
  if (accelerator_mods & EGG_VIRTUAL_CONTROL_MASK)
    l += sizeof (text_control) - 1;
  if (accelerator_mods & EGG_VIRTUAL_ALT_MASK)
    l += sizeof (text_mod1) - 1;
  if (accelerator_mods & EGG_VIRTUAL_MOD2_MASK)
    l += sizeof (text_mod2) - 1;
  if (accelerator_mods & EGG_VIRTUAL_MOD3_MASK)
    l += sizeof (text_mod3) - 1;
  if (accelerator_mods & EGG_VIRTUAL_MOD4_MASK)
    l += sizeof (text_mod4) - 1;
  if (accelerator_mods & EGG_VIRTUAL_MOD5_MASK)
    l += sizeof (text_mod5) - 1;
  if (accelerator_mods & EGG_VIRTUAL_META_MASK)
    l += sizeof (text_meta) - 1;
  if (accelerator_mods & EGG_VIRTUAL_HYPER_MASK)
    l += sizeof (text_hyper) - 1;
  if (accelerator_mods & EGG_VIRTUAL_SUPER_MASK)
    l += sizeof (text_super) - 1;
  l += strlen (keyval_name);

  accelerator = g_new (gchar, l + 1);

  l = 0;
  accelerator[l] = 0;
  if (accelerator_mods & EGG_VIRTUAL_RELEASE_MASK)
    {
      strcpy (accelerator + l, text_release);
      l += sizeof (text_release) - 1;
    }
  if (accelerator_mods & EGG_VIRTUAL_SHIFT_MASK)
    {
      strcpy (accelerator + l, text_shift);
      l += sizeof (text_shift) - 1;
    }
  if (accelerator_mods & EGG_VIRTUAL_CONTROL_MASK)
    {
      strcpy (accelerator + l, text_control);
      l += sizeof (text_control) - 1;
    }
  if (accelerator_mods & EGG_VIRTUAL_ALT_MASK)
    {
      strcpy (accelerator + l, text_mod1);
      l += sizeof (text_mod1) - 1;
    }
  if (accelerator_mods & EGG_VIRTUAL_MOD2_MASK)
    {
      strcpy (accelerator + l, text_mod2);
      l += sizeof (text_mod2) - 1;
    }
  if (accelerator_mods & EGG_VIRTUAL_MOD3_MASK)
    {
      strcpy (accelerator + l, text_mod3);
      l += sizeof (text_mod3) - 1;
    }
  if (accelerator_mods & EGG_VIRTUAL_MOD4_MASK)
    {
      strcpy (accelerator + l, text_mod4);
      l += sizeof (text_mod4) - 1;
    }
  if (accelerator_mods & EGG_VIRTUAL_MOD5_MASK)
    {
      strcpy (accelerator + l, text_mod5);
      l += sizeof (text_mod5) - 1;
    }
  if (accelerator_mods & EGG_VIRTUAL_META_MASK)
    {
      strcpy (accelerator + l, text_meta);
      l += sizeof (text_meta) - 1;
    }
  if (accelerator_mods & EGG_VIRTUAL_HYPER_MASK)
    {
      strcpy (accelerator + l, text_hyper);
      l += sizeof (text_hyper) - 1;
    }
  if (accelerator_mods & EGG_VIRTUAL_SUPER_MASK)
    {
      strcpy (accelerator + l, text_super);
      l += sizeof (text_super) - 1;
    }
  
  strcpy (accelerator + l, keyval_name);

  return accelerator;
}

void
egg_keymap_resolve_virtual_modifiers (GdkKeymap              *keymap,
                                      EggVirtualModifierType  virtual_mods,
                                      GdkModifierType        *concrete_mods)
{
  GdkModifierType concrete;
  int i;
  const EggModmap *modmap;

  g_return_if_fail (GDK_IS_KEYMAP (keymap));
  g_return_if_fail (concrete_mods != NULL);
  
  modmap = egg_keymap_get_modmap (keymap);
  
  /* Not so sure about this algorithm. */
  
  concrete = 0;
  i = 0;
  while (i < EGG_MODMAP_ENTRY_LAST)
    {
      if (modmap->mapping[i] & virtual_mods)
        concrete |= (1 << i);

      ++i;
    }

  *concrete_mods = concrete;
}

void
egg_keymap_virtualize_modifiers (GdkKeymap              *keymap,
                                 GdkModifierType         concrete_mods,
                                 EggVirtualModifierType *virtual_mods)
{
  GdkModifierType virtual;
  int i;
  const EggModmap *modmap;
  
  g_return_if_fail (GDK_IS_KEYMAP (keymap));
  g_return_if_fail (virtual_mods != NULL);

  modmap = egg_keymap_get_modmap (keymap);
  
  /* Not so sure about this algorithm. */
  
  virtual = 0;
  i = 0;
  while (i < EGG_MODMAP_ENTRY_LAST)
    {
      if ((1 << i) & concrete_mods)
        {
          EggVirtualModifierType cleaned;
          
          cleaned = modmap->mapping[i] & ~(EGG_VIRTUAL_MOD2_MASK |
                                           EGG_VIRTUAL_MOD3_MASK |
                                           EGG_VIRTUAL_MOD4_MASK |
                                           EGG_VIRTUAL_MOD5_MASK);
          
          if (cleaned != 0)
            {
              virtual |= cleaned;
            }
          else
            {
              /* Rather than dropping mod2->mod5 if not bound,
               * go ahead and use the concrete names
               */
              virtual |= modmap->mapping[i];
            }
        }
      
      ++i;
    }
  
  *virtual_mods = virtual;
}

static void
reload_modmap (GdkKeymap *keymap,
               EggModmap *modmap)
{
  XModifierKeymap *xmodmap;
  int map_size;
  int i;

  /* FIXME multihead */
  xmodmap = XGetModifierMapping (gdk_x11_get_default_xdisplay ());

  memset (modmap->mapping, 0, sizeof (modmap->mapping));
  
  /* there are 8 modifiers, and the first 3 are shift, shift lock,
   * and control
   */
  map_size = 8 * xmodmap->max_keypermod;
  i = 3 * xmodmap->max_keypermod;
  while (i < map_size)
    {
      /* get the key code at this point in the map,
       * see if its keysym is one we're interested in
       */
      int keycode = xmodmap->modifiermap[i];
      GdkKeymapKey *keys;
      guint *keyvals;
      int n_entries;
      int j;
      EggVirtualModifierType mask;
      
      keys = NULL;
      keyvals = NULL;
      n_entries = 0;

      gdk_keymap_get_entries_for_keycode (keymap,
                                          keycode,
                                          &keys, &keyvals, &n_entries);
      
      mask = 0;
      j = 0;
      while (j < n_entries)
        {          
          if (keyvals[j] == GDK_Num_Lock)
            mask |= EGG_VIRTUAL_NUM_LOCK_MASK;
          else if (keyvals[j] == GDK_Scroll_Lock)
            mask |= EGG_VIRTUAL_SCROLL_LOCK_MASK;
          else if (keyvals[j] == GDK_Meta_L ||
                   keyvals[j] == GDK_Meta_R)
            mask |= EGG_VIRTUAL_META_MASK;
          else if (keyvals[j] == GDK_Hyper_L ||
                   keyvals[j] == GDK_Hyper_R)
            mask |= EGG_VIRTUAL_HYPER_MASK;
          else if (keyvals[j] == GDK_Super_L ||
                   keyvals[j] == GDK_Super_R)
            mask |= EGG_VIRTUAL_SUPER_MASK;
          else if (keyvals[j] == GDK_Mode_switch)
            mask |= EGG_VIRTUAL_MODE_SWITCH_MASK;
          
          ++j;
        }

      /* Mod1Mask is 1 << 3 for example, i.e. the
       * fourth modifier, i / keyspermod is the modifier
       * index
       */      
      modmap->mapping[i/xmodmap->max_keypermod] |= mask;
      
      g_free (keyvals);
      g_free (keys);      
      
      ++i;
    }

  /* Add in the not-really-virtual fixed entries */
  modmap->mapping[EGG_MODMAP_ENTRY_SHIFT] |= EGG_VIRTUAL_SHIFT_MASK;
  modmap->mapping[EGG_MODMAP_ENTRY_CONTROL] |= EGG_VIRTUAL_CONTROL_MASK;
  modmap->mapping[EGG_MODMAP_ENTRY_LOCK] |= EGG_VIRTUAL_LOCK_MASK;
  modmap->mapping[EGG_MODMAP_ENTRY_MOD1] |= EGG_VIRTUAL_ALT_MASK;
  modmap->mapping[EGG_MODMAP_ENTRY_MOD2] |= EGG_VIRTUAL_MOD2_MASK;
  modmap->mapping[EGG_MODMAP_ENTRY_MOD3] |= EGG_VIRTUAL_MOD3_MASK;
  modmap->mapping[EGG_MODMAP_ENTRY_MOD4] |= EGG_VIRTUAL_MOD4_MASK;
  modmap->mapping[EGG_MODMAP_ENTRY_MOD5] |= EGG_VIRTUAL_MOD5_MASK;
  
  XFreeModifiermap (xmodmap);
}

const EggModmap*
egg_keymap_get_modmap (GdkKeymap *keymap)
{
  EggModmap *modmap;

  /* This is all a hack, much simpler when we can just
   * modify GDK directly.
   */
  
  modmap = g_object_get_data (G_OBJECT (keymap),
                              "egg-modmap");

  if (modmap == NULL)
    {
      modmap = g_new0 (EggModmap, 1);

      /* FIXME modify keymap change events with an event filter
       * and force a reload if we get one
       */
      
      reload_modmap (keymap, modmap);
      
      g_object_set_data_full (G_OBJECT (keymap),
                              "egg-modmap",
                              modmap,
                              g_free);
    }

  g_assert (modmap != NULL);
  
  return modmap;
}