1 /* eggaccelerators.c
2  * Copyright (C) 2002  Red Hat, Inc.; Copyright 1998, 2001 Tim Janik
3  * Developed by Havoc Pennington, Tim Janik
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Library General Public
7  * License as published by the Free Software Foundation; either
8  * version 2 of the License, or (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * Library General Public License for more details.
14  *
15  * You should have received a copy of the GNU Library General Public
16  * License along with this library; if not, write to the
17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18  * Boston, MA 02111-1307, USA.
19  */
20 
21 #include "eggaccelerators.h"
22 
23 #include <string.h>
24 #include <gdk/gdkx.h>
25 #include <gdk/gdkkeysyms.h>
26 
27 enum
28 {
29   EGG_MODMAP_ENTRY_SHIFT   = 0,
30   EGG_MODMAP_ENTRY_LOCK    = 1,
31   EGG_MODMAP_ENTRY_CONTROL = 2,
32   EGG_MODMAP_ENTRY_MOD1    = 3,
33   EGG_MODMAP_ENTRY_MOD2    = 4,
34   EGG_MODMAP_ENTRY_MOD3    = 5,
35   EGG_MODMAP_ENTRY_MOD4    = 6,
36   EGG_MODMAP_ENTRY_MOD5    = 7,
37   EGG_MODMAP_ENTRY_LAST    = 8
38 };
39 
40 #define MODMAP_ENTRY_TO_MODIFIER(x) (1 << (x))
41 
42 typedef struct
43 {
44   EggVirtualModifierType mapping[EGG_MODMAP_ENTRY_LAST];
45 
46 } EggModmap;
47 
48 const EggModmap* egg_keymap_get_modmap (GdkKeymap *keymap);
49 
50 static inline gboolean
is_alt(const gchar * string)51 is_alt (const gchar *string)
52 {
53   return ((string[0] == '<') &&
54 	  (string[1] == 'a' || string[1] == 'A') &&
55 	  (string[2] == 'l' || string[2] == 'L') &&
56 	  (string[3] == 't' || string[3] == 'T') &&
57 	  (string[4] == '>'));
58 }
59 
60 static inline gboolean
is_ctl(const gchar * string)61 is_ctl (const gchar *string)
62 {
63   return ((string[0] == '<') &&
64 	  (string[1] == 'c' || string[1] == 'C') &&
65 	  (string[2] == 't' || string[2] == 'T') &&
66 	  (string[3] == 'l' || string[3] == 'L') &&
67 	  (string[4] == '>'));
68 }
69 
70 static inline gboolean
is_modx(const gchar * string)71 is_modx (const gchar *string)
72 {
73   return ((string[0] == '<') &&
74 	  (string[1] == 'm' || string[1] == 'M') &&
75 	  (string[2] == 'o' || string[2] == 'O') &&
76 	  (string[3] == 'd' || string[3] == 'D') &&
77 	  (string[4] >= '1' && string[4] <= '5') &&
78 	  (string[5] == '>'));
79 }
80 
81 static inline gboolean
is_ctrl(const gchar * string)82 is_ctrl (const gchar *string)
83 {
84   return ((string[0] == '<') &&
85 	  (string[1] == 'c' || string[1] == 'C') &&
86 	  (string[2] == 't' || string[2] == 'T') &&
87 	  (string[3] == 'r' || string[3] == 'R') &&
88 	  (string[4] == 'l' || string[4] == 'L') &&
89 	  (string[5] == '>'));
90 }
91 
92 static inline gboolean
is_shft(const gchar * string)93 is_shft (const gchar *string)
94 {
95   return ((string[0] == '<') &&
96 	  (string[1] == 's' || string[1] == 'S') &&
97 	  (string[2] == 'h' || string[2] == 'H') &&
98 	  (string[3] == 'f' || string[3] == 'F') &&
99 	  (string[4] == 't' || string[4] == 'T') &&
100 	  (string[5] == '>'));
101 }
102 
103 static inline gboolean
is_shift(const gchar * string)104 is_shift (const gchar *string)
105 {
106   return ((string[0] == '<') &&
107 	  (string[1] == 's' || string[1] == 'S') &&
108 	  (string[2] == 'h' || string[2] == 'H') &&
109 	  (string[3] == 'i' || string[3] == 'I') &&
110 	  (string[4] == 'f' || string[4] == 'F') &&
111 	  (string[5] == 't' || string[5] == 'T') &&
112 	  (string[6] == '>'));
113 }
114 
115 static inline gboolean
is_control(const gchar * string)116 is_control (const gchar *string)
117 {
118   return ((string[0] == '<') &&
119 	  (string[1] == 'c' || string[1] == 'C') &&
120 	  (string[2] == 'o' || string[2] == 'O') &&
121 	  (string[3] == 'n' || string[3] == 'N') &&
122 	  (string[4] == 't' || string[4] == 'T') &&
123 	  (string[5] == 'r' || string[5] == 'R') &&
124 	  (string[6] == 'o' || string[6] == 'O') &&
125 	  (string[7] == 'l' || string[7] == 'L') &&
126 	  (string[8] == '>'));
127 }
128 
129 static inline gboolean
is_release(const gchar * string)130 is_release (const gchar *string)
131 {
132   return ((string[0] == '<') &&
133 	  (string[1] == 'r' || string[1] == 'R') &&
134 	  (string[2] == 'e' || string[2] == 'E') &&
135 	  (string[3] == 'l' || string[3] == 'L') &&
136 	  (string[4] == 'e' || string[4] == 'E') &&
137 	  (string[5] == 'a' || string[5] == 'A') &&
138 	  (string[6] == 's' || string[6] == 'S') &&
139 	  (string[7] == 'e' || string[7] == 'E') &&
140 	  (string[8] == '>'));
141 }
142 
143 static inline gboolean
is_meta(const gchar * string)144 is_meta (const gchar *string)
145 {
146   return ((string[0] == '<') &&
147 	  (string[1] == 'm' || string[1] == 'M') &&
148 	  (string[2] == 'e' || string[2] == 'E') &&
149 	  (string[3] == 't' || string[3] == 'T') &&
150 	  (string[4] == 'a' || string[4] == 'A') &&
151 	  (string[5] == '>'));
152 }
153 
154 static inline gboolean
is_super(const gchar * string)155 is_super (const gchar *string)
156 {
157   return ((string[0] == '<') &&
158 	  (string[1] == 's' || string[1] == 'S') &&
159 	  (string[2] == 'u' || string[2] == 'U') &&
160 	  (string[3] == 'p' || string[3] == 'P') &&
161 	  (string[4] == 'e' || string[4] == 'E') &&
162 	  (string[5] == 'r' || string[5] == 'R') &&
163 	  (string[6] == '>'));
164 }
165 
166 static inline gboolean
is_hyper(const gchar * string)167 is_hyper (const gchar *string)
168 {
169   return ((string[0] == '<') &&
170 	  (string[1] == 'h' || string[1] == 'H') &&
171 	  (string[2] == 'y' || string[2] == 'Y') &&
172 	  (string[3] == 'p' || string[3] == 'P') &&
173 	  (string[4] == 'e' || string[4] == 'E') &&
174 	  (string[5] == 'r' || string[5] == 'R') &&
175 	  (string[6] == '>'));
176 }
177 
178 /**
179  * egg_accelerator_parse_virtual:
180  * @accelerator:      string representing an accelerator
181  * @accelerator_key:  return location for accelerator keyval
182  * @accelerator_mods: return location for accelerator modifier mask
183  *
184  * Parses a string representing a virtual accelerator. The format
185  * looks like "&lt;Control&gt;a" or "&lt;Shift&gt;&lt;Alt&gt;F1" or
186  * "&lt;Release&gt;z" (the last one is for key release).  The parser
187  * is fairly liberal and allows lower or upper case, and also
188  * abbreviations such as "&lt;Ctl&gt;" and "&lt;Ctrl&gt;".
189  *
190  * If the parse fails, @accelerator_key and @accelerator_mods will
191  * be set to 0 (zero) and %FALSE will be returned. If the string contains
192  * only modifiers, @accelerator_key will be set to 0 but %TRUE will be
193  * returned.
194  *
195  * The virtual vs. concrete accelerator distinction is a relic of
196  * how the X Window System works; there are modifiers Mod2-Mod5 that
197  * can represent various keyboard keys (numlock, meta, hyper, etc.),
198  * the virtual modifier represents the keyboard key, the concrete
199  * modifier the actual Mod2-Mod5 bits in the key press event.
200  *
201  * Returns: %TRUE on success.
202  */
203 gboolean
egg_accelerator_parse_virtual(const gchar * accelerator,guint * accelerator_key,EggVirtualModifierType * accelerator_mods)204 egg_accelerator_parse_virtual (const gchar            *accelerator,
205                                guint                  *accelerator_key,
206                                EggVirtualModifierType *accelerator_mods)
207 {
208   guint keyval;
209   GdkModifierType mods;
210   gint len;
211   gboolean bad_keyval;
212 
213   if (accelerator_key)
214     *accelerator_key = 0;
215   if (accelerator_mods)
216     *accelerator_mods = 0;
217 
218   g_return_val_if_fail (accelerator != NULL, FALSE);
219 
220   bad_keyval = FALSE;
221 
222   keyval = 0;
223   mods = 0;
224   len = strlen (accelerator);
225   while (len)
226     {
227       if (*accelerator == '<')
228 	{
229 	  if (len >= 9 && is_release (accelerator))
230 	    {
231 	      accelerator += 9;
232 	      len -= 9;
233 	      mods |= EGG_VIRTUAL_RELEASE_MASK;
234 	    }
235 	  else if (len >= 9 && is_control (accelerator))
236 	    {
237 	      accelerator += 9;
238 	      len -= 9;
239 	      mods |= EGG_VIRTUAL_CONTROL_MASK;
240 	    }
241 	  else if (len >= 7 && is_shift (accelerator))
242 	    {
243 	      accelerator += 7;
244 	      len -= 7;
245 	      mods |= EGG_VIRTUAL_SHIFT_MASK;
246 	    }
247 	  else if (len >= 6 && is_shft (accelerator))
248 	    {
249 	      accelerator += 6;
250 	      len -= 6;
251 	      mods |= EGG_VIRTUAL_SHIFT_MASK;
252 	    }
253 	  else if (len >= 6 && is_ctrl (accelerator))
254 	    {
255 	      accelerator += 6;
256 	      len -= 6;
257 	      mods |= EGG_VIRTUAL_CONTROL_MASK;
258 	    }
259 	  else if (len >= 6 && is_modx (accelerator))
260 	    {
261 	      static const guint mod_vals[] = {
262 		EGG_VIRTUAL_ALT_MASK, EGG_VIRTUAL_MOD2_MASK, EGG_VIRTUAL_MOD3_MASK,
263 		EGG_VIRTUAL_MOD4_MASK, EGG_VIRTUAL_MOD5_MASK
264 	      };
265 
266 	      len -= 6;
267 	      accelerator += 4;
268 	      mods |= mod_vals[*accelerator - '1'];
269 	      accelerator += 2;
270 	    }
271 	  else if (len >= 5 && is_ctl (accelerator))
272 	    {
273 	      accelerator += 5;
274 	      len -= 5;
275 	      mods |= EGG_VIRTUAL_CONTROL_MASK;
276 	    }
277 	  else if (len >= 5 && is_alt (accelerator))
278 	    {
279 	      accelerator += 5;
280 	      len -= 5;
281 	      mods |= EGG_VIRTUAL_ALT_MASK;
282 	    }
283           else if (len >= 6 && is_meta (accelerator))
284 	    {
285 	      accelerator += 6;
286 	      len -= 6;
287 	      mods |= EGG_VIRTUAL_META_MASK;
288 	    }
289           else if (len >= 7 && is_hyper (accelerator))
290 	    {
291 	      accelerator += 7;
292 	      len -= 7;
293 	      mods |= EGG_VIRTUAL_HYPER_MASK;
294 	    }
295           else if (len >= 7 && is_super (accelerator))
296 	    {
297 	      accelerator += 7;
298 	      len -= 7;
299 	      mods |= EGG_VIRTUAL_SUPER_MASK;
300 	    }
301 	  else
302 	    {
303 	      gchar last_ch;
304 
305 	      last_ch = *accelerator;
306 	      while (last_ch && last_ch != '>')
307 		{
308 		  last_ch = *accelerator;
309 		  accelerator += 1;
310 		  len -= 1;
311 		}
312 	    }
313 	}
314       else
315 	{
316           keyval = gdk_keyval_from_name (accelerator);
317 
318           if (keyval == 0)
319             bad_keyval = TRUE;
320 
321           accelerator += len;
322           len -= len;
323 	}
324     }
325 
326   if (accelerator_key)
327     *accelerator_key = gdk_keyval_to_lower (keyval);
328   if (accelerator_mods)
329     *accelerator_mods = mods;
330 
331   return !bad_keyval;
332 }
333 
334 
335 /**
336  * egg_virtual_accelerator_name:
337  * @accelerator_key:  accelerator keyval
338  * @accelerator_mods: accelerator modifier mask
339  * @returns:          a newly-allocated accelerator name
340  *
341  * Converts an accelerator keyval and modifier mask
342  * into a string parseable by egg_accelerator_parse_virtual().
343  * For example, if you pass in #GDK_q and #EGG_VIRTUAL_CONTROL_MASK,
344  * this function returns "&lt;Control&gt;q".
345  *
346  * The caller of this function must free the returned string.
347  */
348 gchar*
egg_virtual_accelerator_name(guint accelerator_key,EggVirtualModifierType accelerator_mods)349 egg_virtual_accelerator_name (guint                  accelerator_key,
350                               EggVirtualModifierType accelerator_mods)
351 {
352   static const gchar text_release[] = "<Release>";
353   static const gchar text_shift[] = "<Shift>";
354   static const gchar text_control[] = "<Control>";
355   static const gchar text_mod1[] = "<Alt>";
356   static const gchar text_mod2[] = "<Mod2>";
357   static const gchar text_mod3[] = "<Mod3>";
358   static const gchar text_mod4[] = "<Mod4>";
359   static const gchar text_mod5[] = "<Mod5>";
360   static const gchar text_meta[] = "<Meta>";
361   static const gchar text_super[] = "<Super>";
362   static const gchar text_hyper[] = "<Hyper>";
363   guint l;
364   gchar *keyval_name;
365   gchar *accelerator;
366 
367   accelerator_mods &= EGG_VIRTUAL_MODIFIER_MASK;
368 
369   keyval_name = gdk_keyval_name (gdk_keyval_to_lower (accelerator_key));
370   if (!keyval_name)
371     keyval_name = "";
372 
373   l = 0;
374   if (accelerator_mods & EGG_VIRTUAL_RELEASE_MASK)
375     l += sizeof (text_release) - 1;
376   if (accelerator_mods & EGG_VIRTUAL_SHIFT_MASK)
377     l += sizeof (text_shift) - 1;
378   if (accelerator_mods & EGG_VIRTUAL_CONTROL_MASK)
379     l += sizeof (text_control) - 1;
380   if (accelerator_mods & EGG_VIRTUAL_ALT_MASK)
381     l += sizeof (text_mod1) - 1;
382   if (accelerator_mods & EGG_VIRTUAL_MOD2_MASK)
383     l += sizeof (text_mod2) - 1;
384   if (accelerator_mods & EGG_VIRTUAL_MOD3_MASK)
385     l += sizeof (text_mod3) - 1;
386   if (accelerator_mods & EGG_VIRTUAL_MOD4_MASK)
387     l += sizeof (text_mod4) - 1;
388   if (accelerator_mods & EGG_VIRTUAL_MOD5_MASK)
389     l += sizeof (text_mod5) - 1;
390   if (accelerator_mods & EGG_VIRTUAL_META_MASK)
391     l += sizeof (text_meta) - 1;
392   if (accelerator_mods & EGG_VIRTUAL_HYPER_MASK)
393     l += sizeof (text_hyper) - 1;
394   if (accelerator_mods & EGG_VIRTUAL_SUPER_MASK)
395     l += sizeof (text_super) - 1;
396   l += strlen (keyval_name);
397 
398   accelerator = g_new (gchar, l + 1);
399 
400   l = 0;
401   accelerator[l] = 0;
402   if (accelerator_mods & EGG_VIRTUAL_RELEASE_MASK)
403     {
404       strcpy (accelerator + l, text_release);
405       l += sizeof (text_release) - 1;
406     }
407   if (accelerator_mods & EGG_VIRTUAL_SHIFT_MASK)
408     {
409       strcpy (accelerator + l, text_shift);
410       l += sizeof (text_shift) - 1;
411     }
412   if (accelerator_mods & EGG_VIRTUAL_CONTROL_MASK)
413     {
414       strcpy (accelerator + l, text_control);
415       l += sizeof (text_control) - 1;
416     }
417   if (accelerator_mods & EGG_VIRTUAL_ALT_MASK)
418     {
419       strcpy (accelerator + l, text_mod1);
420       l += sizeof (text_mod1) - 1;
421     }
422   if (accelerator_mods & EGG_VIRTUAL_MOD2_MASK)
423     {
424       strcpy (accelerator + l, text_mod2);
425       l += sizeof (text_mod2) - 1;
426     }
427   if (accelerator_mods & EGG_VIRTUAL_MOD3_MASK)
428     {
429       strcpy (accelerator + l, text_mod3);
430       l += sizeof (text_mod3) - 1;
431     }
432   if (accelerator_mods & EGG_VIRTUAL_MOD4_MASK)
433     {
434       strcpy (accelerator + l, text_mod4);
435       l += sizeof (text_mod4) - 1;
436     }
437   if (accelerator_mods & EGG_VIRTUAL_MOD5_MASK)
438     {
439       strcpy (accelerator + l, text_mod5);
440       l += sizeof (text_mod5) - 1;
441     }
442   if (accelerator_mods & EGG_VIRTUAL_META_MASK)
443     {
444       strcpy (accelerator + l, text_meta);
445       l += sizeof (text_meta) - 1;
446     }
447   if (accelerator_mods & EGG_VIRTUAL_HYPER_MASK)
448     {
449       strcpy (accelerator + l, text_hyper);
450       l += sizeof (text_hyper) - 1;
451     }
452   if (accelerator_mods & EGG_VIRTUAL_SUPER_MASK)
453     {
454       strcpy (accelerator + l, text_super);
455       l += sizeof (text_super) - 1;
456     }
457 
458   strcpy (accelerator + l, keyval_name);
459 
460   return accelerator;
461 }
462 
463 void
egg_keymap_resolve_virtual_modifiers(GdkKeymap * keymap,EggVirtualModifierType virtual_mods,GdkModifierType * concrete_mods)464 egg_keymap_resolve_virtual_modifiers (GdkKeymap              *keymap,
465                                       EggVirtualModifierType  virtual_mods,
466                                       GdkModifierType        *concrete_mods)
467 {
468   GdkModifierType concrete;
469   int i;
470   const EggModmap *modmap;
471 
472   g_return_if_fail (GDK_IS_KEYMAP (keymap));
473   g_return_if_fail (concrete_mods != NULL);
474 
475   modmap = egg_keymap_get_modmap (keymap);
476 
477   /* Not so sure about this algorithm. */
478 
479   concrete = 0;
480   i = 0;
481   while (i < EGG_MODMAP_ENTRY_LAST)
482     {
483       if (modmap->mapping[i] & virtual_mods)
484         concrete |= (1 << i);
485 
486       ++i;
487     }
488 
489   *concrete_mods = concrete;
490 }
491 
492 void
egg_keymap_virtualize_modifiers(GdkKeymap * keymap,GdkModifierType concrete_mods,EggVirtualModifierType * virtual_mods)493 egg_keymap_virtualize_modifiers (GdkKeymap              *keymap,
494                                  GdkModifierType         concrete_mods,
495                                  EggVirtualModifierType *virtual_mods)
496 {
497   GdkModifierType virtual;
498   int i;
499   const EggModmap *modmap;
500 
501   g_return_if_fail (GDK_IS_KEYMAP (keymap));
502   g_return_if_fail (virtual_mods != NULL);
503 
504   modmap = egg_keymap_get_modmap (keymap);
505 
506   /* Not so sure about this algorithm. */
507 
508   virtual = 0;
509   i = 0;
510   while (i < EGG_MODMAP_ENTRY_LAST)
511     {
512       if ((1 << i) & concrete_mods)
513         {
514           EggVirtualModifierType cleaned;
515 
516           cleaned = modmap->mapping[i] & ~(EGG_VIRTUAL_MOD2_MASK |
517                                            EGG_VIRTUAL_MOD3_MASK |
518                                            EGG_VIRTUAL_MOD4_MASK |
519                                            EGG_VIRTUAL_MOD5_MASK);
520 
521           if (cleaned != 0)
522             {
523               virtual |= cleaned;
524             }
525           else
526             {
527               /* Rather than dropping mod2->mod5 if not bound,
528                * go ahead and use the concrete names
529                */
530               virtual |= modmap->mapping[i];
531             }
532         }
533 
534       ++i;
535     }
536 
537   *virtual_mods = virtual;
538 }
539 
540 static void
reload_modmap(GdkKeymap * keymap,EggModmap * modmap)541 reload_modmap (GdkKeymap *keymap,
542                EggModmap *modmap)
543 {
544   XModifierKeymap *xmodmap;
545   int map_size;
546   int i;
547 
548   /* FIXME multihead */
549   xmodmap = XGetModifierMapping (gdk_x11_get_default_xdisplay ());
550 
551   memset (modmap->mapping, 0, sizeof (modmap->mapping));
552 
553   /* there are 8 modifiers, and the first 3 are shift, shift lock,
554    * and control
555    */
556   map_size = 8 * xmodmap->max_keypermod;
557   i = 3 * xmodmap->max_keypermod;
558   while (i < map_size)
559     {
560       /* get the key code at this point in the map,
561        * see if its keysym is one we're interested in
562        */
563       int keycode = xmodmap->modifiermap[i];
564       GdkKeymapKey *keys;
565       guint *keyvals;
566       int n_entries;
567       int j;
568       EggVirtualModifierType mask;
569 
570       keys = NULL;
571       keyvals = NULL;
572       n_entries = 0;
573 
574       gdk_keymap_get_entries_for_keycode (keymap,
575                                           keycode,
576                                           &keys, &keyvals, &n_entries);
577 
578       mask = 0;
579       j = 0;
580       while (j < n_entries)
581         {
582           if (keyvals[j] == GDK_KEY_Num_Lock)
583             mask |= EGG_VIRTUAL_NUM_LOCK_MASK;
584           else if (keyvals[j] == GDK_KEY_Scroll_Lock)
585             mask |= EGG_VIRTUAL_SCROLL_LOCK_MASK;
586           else if (keyvals[j] == GDK_KEY_Meta_L ||
587                    keyvals[j] == GDK_KEY_Meta_R)
588             mask |= EGG_VIRTUAL_META_MASK;
589           else if (keyvals[j] == GDK_KEY_Hyper_L ||
590                    keyvals[j] == GDK_KEY_Hyper_R)
591             mask |= EGG_VIRTUAL_HYPER_MASK;
592           else if (keyvals[j] == GDK_KEY_Super_L ||
593                    keyvals[j] == GDK_KEY_Super_R)
594             mask |= EGG_VIRTUAL_SUPER_MASK;
595           else if (keyvals[j] == GDK_KEY_Mode_switch)
596             mask |= EGG_VIRTUAL_MODE_SWITCH_MASK;
597 
598           ++j;
599         }
600 
601       /* Mod1Mask is 1 << 3 for example, i.e. the
602        * fourth modifier, i / keyspermod is the modifier
603        * index
604        */
605       modmap->mapping[i/xmodmap->max_keypermod] |= mask;
606 
607       g_free (keyvals);
608       g_free (keys);
609 
610       ++i;
611     }
612 
613   /* Add in the not-really-virtual fixed entries */
614   modmap->mapping[EGG_MODMAP_ENTRY_SHIFT] |= EGG_VIRTUAL_SHIFT_MASK;
615   modmap->mapping[EGG_MODMAP_ENTRY_CONTROL] |= EGG_VIRTUAL_CONTROL_MASK;
616   modmap->mapping[EGG_MODMAP_ENTRY_LOCK] |= EGG_VIRTUAL_LOCK_MASK;
617   modmap->mapping[EGG_MODMAP_ENTRY_MOD1] |= EGG_VIRTUAL_ALT_MASK;
618   modmap->mapping[EGG_MODMAP_ENTRY_MOD2] |= EGG_VIRTUAL_MOD2_MASK;
619   modmap->mapping[EGG_MODMAP_ENTRY_MOD3] |= EGG_VIRTUAL_MOD3_MASK;
620   modmap->mapping[EGG_MODMAP_ENTRY_MOD4] |= EGG_VIRTUAL_MOD4_MASK;
621   modmap->mapping[EGG_MODMAP_ENTRY_MOD5] |= EGG_VIRTUAL_MOD5_MASK;
622 
623   XFreeModifiermap (xmodmap);
624 }
625 
626 const EggModmap*
egg_keymap_get_modmap(GdkKeymap * keymap)627 egg_keymap_get_modmap (GdkKeymap *keymap)
628 {
629   EggModmap *modmap;
630 
631   /* This is all a hack, much simpler when we can just
632    * modify GDK directly.
633    */
634 
635   modmap = g_object_get_data (G_OBJECT (keymap),
636                               "egg-modmap");
637 
638   if (modmap == NULL)
639     {
640       modmap = g_new0 (EggModmap, 1);
641 
642       /* FIXME modify keymap change events with an event filter
643        * and force a reload if we get one
644        */
645 
646       reload_modmap (keymap, modmap);
647 
648       g_object_set_data_full (G_OBJECT (keymap),
649                               "egg-modmap",
650                               modmap,
651                               g_free);
652     }
653 
654   g_assert (modmap != NULL);
655 
656   return modmap;
657 }
658