1 /************************************************************
2 * Copyright (c) 1993 by Silicon Graphics Computer Systems, Inc.
4 * Permission to use, copy, modify, and distribute this
5 * software and its documentation for any purpose and without
6 * fee is hereby granted, provided that the above copyright
7 * notice appear in all copies and that both that copyright
8 * notice and this permission notice appear in supporting
9 * documentation, and that the name of Silicon Graphics not be
10 * used in advertising or publicity pertaining to distribution
11 * of the software without specific prior written permission.
12 * Silicon Graphics makes no representation about the suitability
13 * of this software for any purpose. It is provided "as is"
14 * without any express or implied warranty.
16 * SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
17 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
18 * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
19 * GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
20 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
22 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH
23 * THE USE OR PERFORMANCE OF THIS SOFTWARE.
25 ********************************************************/
28 * Copyright © 2012 Intel Corporation
29 * Copyright © 2012 Ran Benita <ran234@gmail.com>
31 * Permission is hereby granted, free of charge, to any person obtaining a
32 * copy of this software and associated documentation files (the "Software"),
33 * to deal in the Software without restriction, including without limitation
34 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
35 * and/or sell copies of the Software, and to permit persons to whom the
36 * Software is furnished to do so, subject to the following conditions:
38 * The above copyright notice and this permission notice (including the next
39 * paragraph) shall be included in all copies or substantial portions of the
42 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
43 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
44 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
45 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
46 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
47 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
48 * DEALINGS IN THE SOFTWARE.
50 * Author: Daniel Stone <daniel@fooishbar.org>
54 * This is a bastardised version of xkbActions.c from the X server which
55 * does not support, for the moment:
56 * - AccessX sticky/debounce/etc (will come later)
57 * - pointer keys (may come later)
58 * - key redirects (unlikely)
59 * - messages (very unlikely)
68 struct xkb_state *state;
69 union xkb_action action;
70 const struct xkb_key *key;
72 int (*func)(struct xkb_filter *filter,
73 const struct xkb_key *key,
74 enum xkb_key_direction direction);
79 xkb_group_index_t base_group; /**< depressed */
80 xkb_group_index_t latched_group;
81 xkb_group_index_t locked_group;
82 xkb_group_index_t group; /**< effective */
84 xkb_mod_mask_t base_mods; /**< depressed */
85 xkb_mod_mask_t latched_mods;
86 xkb_mod_mask_t locked_mods;
87 xkb_mod_mask_t mods; /**< effective */
90 * At each event, we accumulate all the needed modifications to the base
91 * modifiers, and apply them at the end. These keep track of this state.
93 xkb_mod_mask_t set_mods;
94 xkb_mod_mask_t clear_mods;
96 * We mustn't clear a base modifier if there's another depressed key
97 * which affects it, e.g. given this sequence
98 * < Left Shift down, Right Shift down, Left Shift Up >
99 * the modifier should still be set. This keeps the count.
101 int16_t mod_key_count[sizeof(xkb_mod_mask_t) * 8];
106 darray(struct xkb_filter) filters;
107 struct xkb_keymap *keymap;
110 static const union xkb_action fake = { .type = ACTION_TYPE_NONE };
112 static const union xkb_action *
113 xkb_key_get_action(struct xkb_state *state, const struct xkb_key *key)
115 xkb_group_index_t group;
116 xkb_level_index_t level;
121 group = xkb_key_get_group(state, key);
122 if (group == XKB_GROUP_INVALID)
125 level = xkb_key_get_level(state, key, group);
126 if (level == XKB_LEVEL_INVALID)
129 return XkbKeyActionEntry(key, group, level);
132 static struct xkb_filter *
133 xkb_filter_new(struct xkb_state *state)
135 struct xkb_filter *filter = NULL, *iter;
137 darray_foreach(iter, state->filters) {
145 darray_resize0(state->filters, darray_size(state->filters) + 1);
146 filter = &darray_item(state->filters, darray_size(state->filters) -1);
149 filter->state = state;
154 /***====================================================================***/
157 xkb_filter_group_set_func(struct xkb_filter *filter,
158 const struct xkb_key *key,
159 enum xkb_key_direction direction)
161 if (key != filter->key) {
162 filter->action.group.flags &= ~ACTION_LOCK_CLEAR;
166 if (direction == XKB_KEY_DOWN) {
170 else if (--filter->refcnt > 0) {
174 if (filter->action.group.flags & ACTION_ABSOLUTE_SWITCH)
175 filter->state->base_group = filter->action.group.group;
177 filter->state->base_group = -filter->action.group.group;
178 if (filter->action.group.flags & ACTION_LOCK_CLEAR)
179 filter->state->locked_group = 0;
187 xkb_filter_group_set_new(struct xkb_state *state,
188 const struct xkb_key *key,
189 const union xkb_action *action)
191 struct xkb_filter *filter = xkb_filter_new(state);
196 filter->func = xkb_filter_group_set_func;
197 filter->action = *action;
199 if (action->group.flags & ACTION_ABSOLUTE_SWITCH) {
200 filter->action.group.group = filter->state->base_group;
201 filter->state->base_group = action->group.group;
204 filter->state->base_group += action->group.group;
211 xkb_filter_group_lock_func(struct xkb_filter *filter,
212 const struct xkb_key *key,
213 enum xkb_key_direction direction)
215 if (key != filter->key)
218 if (direction == XKB_KEY_DOWN) {
222 if (--filter->refcnt > 0)
230 xkb_filter_group_lock_new(struct xkb_state *state,
231 const struct xkb_key *key,
232 const union xkb_action *action)
234 struct xkb_filter *filter = xkb_filter_new(state);
239 filter->func = xkb_filter_group_lock_func;
240 filter->action = *action;
242 if (action->group.flags & ACTION_ABSOLUTE_SWITCH)
243 filter->state->locked_group = action->group.group;
245 filter->state->locked_group += action->group.group;
251 xkb_filter_mod_set_func(struct xkb_filter *filter,
252 const struct xkb_key *key,
253 enum xkb_key_direction direction)
255 if (key != filter->key) {
256 filter->action.mods.flags &= ~ACTION_LOCK_CLEAR;
260 if (direction == XKB_KEY_DOWN) {
264 else if (--filter->refcnt > 0) {
268 filter->state->clear_mods = filter->action.mods.mods.mask;
269 if (filter->action.mods.flags & ACTION_LOCK_CLEAR)
270 filter->state->locked_mods &= ~filter->action.mods.mods.mask;
277 xkb_filter_mod_set_new(struct xkb_state *state,
278 const struct xkb_key *key,
279 const union xkb_action *action)
281 struct xkb_filter *filter = xkb_filter_new(state);
286 filter->func = xkb_filter_mod_set_func;
287 filter->action = *action;
289 filter->state->set_mods = action->mods.mods.mask;
295 xkb_filter_mod_lock_func(struct xkb_filter *filter,
296 const struct xkb_key *key,
297 enum xkb_key_direction direction)
299 if (key != filter->key)
302 if (direction == XKB_KEY_DOWN) {
306 if (--filter->refcnt > 0)
309 filter->state->locked_mods &= ~filter->priv;
316 xkb_filter_mod_lock_new(struct xkb_state *state,
317 const struct xkb_key *key,
318 const union xkb_action *action)
320 struct xkb_filter *filter = xkb_filter_new(state);
325 filter->func = xkb_filter_mod_lock_func;
326 filter->action = *action;
327 filter->priv = state->locked_mods & action->mods.mods.mask;
329 filter->state->locked_mods |= action->mods.mods.mask;
334 enum xkb_key_latch_state {
341 xkb_action_breaks_latch(const union xkb_action *action)
343 switch (action->type) {
344 case ACTION_TYPE_NONE:
345 case ACTION_TYPE_PTR_BUTTON:
346 case ACTION_TYPE_PTR_LOCK:
347 case ACTION_TYPE_CTRL_SET:
348 case ACTION_TYPE_CTRL_LOCK:
349 case ACTION_TYPE_KEY_REDIRECT:
350 case ACTION_TYPE_SWITCH_VT:
351 case ACTION_TYPE_TERMINATE:
359 xkb_filter_mod_latch_func(struct xkb_filter *filter,
360 const struct xkb_key *key,
361 enum xkb_key_direction direction)
363 enum xkb_key_latch_state latch = filter->priv;
365 if (direction == XKB_KEY_DOWN && latch == LATCH_PENDING) {
366 /* If this is a new keypress and we're awaiting our single latched
367 * keypress, then either break the latch if any random key is pressed,
368 * or promote it to a lock or plain base set if it's the same
370 const union xkb_action *action = xkb_key_get_action(filter->state, key);
371 if (action->type == ACTION_TYPE_MOD_LATCH &&
372 action->mods.flags == filter->action.mods.flags &&
373 action->mods.mods.mask == filter->action.mods.mods.mask) {
374 filter->action = *action;
375 if (filter->action.mods.flags & ACTION_LATCH_TO_LOCK) {
376 filter->action.type = ACTION_TYPE_MOD_LOCK;
377 filter->func = xkb_filter_mod_lock_func;
378 filter->state->locked_mods |= filter->action.mods.mods.mask;
381 filter->action.type = ACTION_TYPE_MOD_SET;
382 filter->func = xkb_filter_mod_set_func;
383 filter->state->set_mods = filter->action.mods.mods.mask;
386 filter->state->latched_mods &= ~filter->action.mods.mods.mask;
390 else if (xkb_action_breaks_latch(action)) {
391 /* XXX: This may be totally broken, we might need to break the
392 * latch in the next run after this press? */
393 filter->state->latched_mods &= ~filter->action.mods.mods.mask;
398 else if (direction == XKB_KEY_UP && key == filter->key) {
399 /* Our key got released. If we've set it to clear locks, and we
400 * currently have the same modifiers locked, then release them and
401 * don't actually latch. Else we've actually hit the latching
402 * stage, so set PENDING and move our modifier from base to
404 if (latch == NO_LATCH ||
405 ((filter->action.mods.flags & ACTION_LOCK_CLEAR) &&
406 (filter->state->locked_mods & filter->action.mods.mods.mask) ==
407 filter->action.mods.mods.mask)) {
408 /* XXX: We might be a bit overenthusiastic about clearing
409 * mods other filters have set here? */
410 if (latch == LATCH_PENDING)
411 filter->state->latched_mods &= ~filter->action.mods.mods.mask;
413 filter->state->clear_mods = filter->action.mods.mods.mask;
414 filter->state->locked_mods &= ~filter->action.mods.mods.mask;
418 latch = LATCH_PENDING;
419 filter->state->clear_mods = filter->action.mods.mods.mask;
420 filter->state->latched_mods |= filter->action.mods.mods.mask;
424 else if (direction == XKB_KEY_DOWN && latch == LATCH_KEY_DOWN) {
425 /* Someone's pressed another key while we've still got the latching
426 * key held down, so keep the base modifier state active (from
427 * xkb_filter_mod_latch_new), but don't trip the latch, just clear
428 * it as soon as the modifier gets released. */
432 filter->priv = latch;
438 xkb_filter_mod_latch_new(struct xkb_state *state,
439 const struct xkb_key *key,
440 const union xkb_action *action)
442 enum xkb_key_latch_state latch = LATCH_KEY_DOWN;
443 struct xkb_filter *filter = xkb_filter_new(state);
448 filter->priv = latch;
449 filter->func = xkb_filter_mod_latch_func;
450 filter->action = *action;
452 filter->state->set_mods = action->mods.mods.mask;
458 * Applies any relevant filters to the key, first from the list of filters
459 * that are currently active, then if no filter has claimed the key, possibly
460 * apply a new filter from the key action.
463 xkb_filter_apply_all(struct xkb_state *state,
464 const struct xkb_key *key,
465 enum xkb_key_direction direction)
467 struct xkb_filter *filter;
468 const union xkb_action *act = NULL;
471 /* First run through all the currently active filters and see if any of
472 * them have claimed this event. */
473 darray_foreach(filter, state->filters) {
476 send &= filter->func(filter, key, direction);
479 if (!send || direction == XKB_KEY_UP)
482 act = xkb_key_get_action(state, key);
484 case ACTION_TYPE_MOD_SET:
485 send = xkb_filter_mod_set_new(state, key, act);
487 case ACTION_TYPE_MOD_LATCH:
488 send = xkb_filter_mod_latch_new(state, key, act);
490 case ACTION_TYPE_MOD_LOCK:
491 send = xkb_filter_mod_lock_new(state, key, act);
493 case ACTION_TYPE_GROUP_SET:
494 send = xkb_filter_group_set_new(state, key, act);
497 case ACTION_TYPE_GROUP_LATCH:
498 send = xkb_filter_mod_latch_new(state, key, act);
501 case ACTION_TYPE_GROUP_LOCK:
502 send = xkb_filter_group_lock_new(state, key, act);
511 XKB_EXPORT struct xkb_state *
512 xkb_state_new(struct xkb_keymap *keymap)
514 struct xkb_state *ret;
516 ret = calloc(sizeof(*ret), 1);
521 ret->keymap = xkb_map_ref(keymap);
526 XKB_EXPORT struct xkb_state *
527 xkb_state_ref(struct xkb_state *state)
534 xkb_state_unref(struct xkb_state *state)
536 if (--state->refcnt > 0)
539 xkb_map_unref(state->keymap);
540 darray_free(state->filters);
544 XKB_EXPORT struct xkb_keymap *
545 xkb_state_get_map(struct xkb_state *state)
547 return state->keymap;
551 * Update the LED state to match the rest of the xkb_state.
554 xkb_state_led_update_all(struct xkb_state *state)
560 for (led = 0; led < XKB_NUM_INDICATORS; led++) {
561 struct xkb_indicator_map *map = &state->keymap->indicators[led];
562 xkb_mod_mask_t mod_mask = 0;
563 uint32_t group_mask = 0;
565 if (map->which_mods & XKB_STATE_DEPRESSED)
566 mod_mask |= state->base_mods;
567 if (map->which_mods & XKB_STATE_LATCHED)
568 mod_mask |= state->latched_mods;
569 if (map->which_mods & XKB_STATE_LOCKED)
570 mod_mask |= state->locked_mods;
571 if ((map->mods.mask & mod_mask))
572 state->leds |= (1 << led);
574 if (map->which_groups & XKB_STATE_DEPRESSED)
575 group_mask |= (1 << state->base_group);
576 if (map->which_groups & XKB_STATE_LATCHED)
577 group_mask |= (1 << state->latched_group);
578 if (map->which_groups & XKB_STATE_LOCKED)
579 group_mask |= (1 << state->locked_group);
580 if ((map->groups & group_mask))
581 state->leds |= (1 << led);
584 if ((map->ctrls & state->keymap->enabled_ctrls))
585 state->leds |= (1 << led);
591 * Calculates the derived state (effective mods/group and LEDs) from an
592 * up-to-date xkb_state.
595 xkb_state_update_derived(struct xkb_state *state)
598 (state->base_mods | state->latched_mods | state->locked_mods);
599 /* FIXME: Clamp/wrap locked_group */
600 state->group = state->locked_group + state->base_group +
601 state->latched_group;
602 /* FIXME: Clamp/wrap effective group */
604 xkb_state_led_update_all(state);
608 * Given a particular key event, updates the state structure to reflect the
612 xkb_state_update_key(struct xkb_state *state, xkb_keycode_t kc,
613 enum xkb_key_direction direction)
617 const struct xkb_key *key = XkbKey(state->keymap, kc);
622 state->clear_mods = 0;
624 xkb_filter_apply_all(state, key, direction);
626 for (i = 0, bit = 1; state->set_mods; i++, bit <<= 1) {
627 if (state->set_mods & bit) {
628 state->mod_key_count[i]++;
629 state->base_mods |= bit;
630 state->set_mods &= ~bit;
634 for (i = 0, bit = 1; state->clear_mods; i++, bit <<= 1) {
635 if (state->clear_mods & bit) {
636 state->mod_key_count[i]--;
637 if (state->mod_key_count[i] <= 0) {
638 state->base_mods &= ~bit;
639 state->mod_key_count[i] = 0;
641 state->clear_mods &= ~bit;
645 xkb_state_update_derived(state);
649 * Updates the state from a set of explicit masks as gained from
650 * xkb_state_serialize_mods and xkb_state_serialize_groups. As noted in the
651 * documentation for these functions in xkbcommon.h, this round-trip is
652 * lossy, and should only be used to update a slave state mirroring the
653 * master, e.g. in a client/server window system.
656 xkb_state_update_mask(struct xkb_state *state,
657 xkb_mod_mask_t base_mods,
658 xkb_mod_mask_t latched_mods,
659 xkb_mod_mask_t locked_mods,
660 xkb_group_index_t base_group,
661 xkb_group_index_t latched_group,
662 xkb_group_index_t locked_group)
664 xkb_mod_index_t num_mods;
667 state->base_mods = 0;
668 state->latched_mods = 0;
669 state->locked_mods = 0;
670 num_mods = xkb_map_num_mods(state->keymap);
672 for (idx = 0; idx < num_mods; idx++) {
673 xkb_mod_mask_t mod = (1 << idx);
675 state->base_mods |= mod;
676 if (latched_mods & mod)
677 state->latched_mods |= mod;
678 if (locked_mods & mod)
679 state->locked_mods |= mod;
682 state->base_group = base_group;
683 state->latched_group = latched_group;
684 state->locked_group = locked_group;
686 xkb_state_update_derived(state);
690 * Serialises the requested modifier state into an xkb_mod_mask_t, with all
691 * the same disclaimers as in xkb_state_update_mask.
693 XKB_EXPORT xkb_mod_mask_t
694 xkb_state_serialize_mods(struct xkb_state *state,
695 enum xkb_state_component type)
697 xkb_mod_mask_t ret = 0;
699 if (type == XKB_STATE_EFFECTIVE)
702 if (type & XKB_STATE_DEPRESSED)
703 ret |= state->base_mods;
704 if (type & XKB_STATE_LATCHED)
705 ret |= state->latched_mods;
706 if (type & XKB_STATE_LOCKED)
707 ret |= state->locked_mods;
713 * Serialises the requested group state, with all the same disclaimers as
714 * in xkb_state_update_mask.
716 XKB_EXPORT xkb_group_index_t
717 xkb_state_serialize_group(struct xkb_state *state,
718 enum xkb_state_component type)
720 xkb_group_index_t ret = 0;
722 if (type == XKB_STATE_EFFECTIVE)
725 if (type & XKB_STATE_DEPRESSED)
726 ret += state->base_group;
727 if (type & XKB_STATE_LATCHED)
728 ret += state->latched_group;
729 if (type & XKB_STATE_LOCKED)
730 ret += state->locked_group;
736 * Returns 1 if the given modifier is active with the specified type(s), 0 if
737 * not, or -1 if the modifier is invalid.
740 xkb_state_mod_index_is_active(struct xkb_state *state,
742 enum xkb_state_component type)
746 if (idx >= xkb_map_num_mods(state->keymap))
749 if (type & XKB_STATE_DEPRESSED)
750 ret |= (state->base_mods & (1 << idx));
751 if (type & XKB_STATE_LATCHED)
752 ret |= (state->latched_mods & (1 << idx));
753 if (type & XKB_STATE_LOCKED)
754 ret |= (state->locked_mods & (1 << idx));
760 * Helper function for xkb_state_mod_indices_are_active and
761 * xkb_state_mod_names_are_active.
764 match_mod_masks(struct xkb_state *state, enum xkb_state_match match,
767 uint32_t active = xkb_state_serialize_mods(state, XKB_STATE_EFFECTIVE);
769 if (!(match & XKB_STATE_MATCH_NON_EXCLUSIVE) && (active & ~wanted))
772 if (match & XKB_STATE_MATCH_ANY)
773 return !!(active & wanted);
775 return (active & wanted) == wanted;
781 * Returns 1 if the modifiers are active with the specified type(s), 0 if
782 * not, or -1 if any of the modifiers are invalid.
785 xkb_state_mod_indices_are_active(struct xkb_state *state,
786 enum xkb_state_component type,
787 enum xkb_state_match match,
791 xkb_mod_index_t idx = 0;
794 xkb_mod_index_t num_mods = xkb_map_num_mods(state->keymap);
798 idx = va_arg(ap, xkb_mod_index_t);
799 if (idx == XKB_MOD_INVALID)
801 if (idx >= num_mods) {
805 wanted |= (1 << idx);
812 return match_mod_masks(state, match, wanted);
816 * Returns 1 if the given modifier is active with the specified type(s), 0 if
817 * not, or -1 if the modifier is invalid.
820 xkb_state_mod_name_is_active(struct xkb_state *state, const char *name,
821 enum xkb_state_component type)
823 xkb_mod_index_t idx = xkb_map_mod_get_index(state->keymap, name);
825 if (idx == XKB_MOD_INVALID)
828 return xkb_state_mod_index_is_active(state, idx, type);
832 * Returns 1 if the modifiers are active with the specified type(s), 0 if
833 * not, or -1 if any of the modifiers are invalid.
835 XKB_EXPORT ATTR_NULL_SENTINEL int
836 xkb_state_mod_names_are_active(struct xkb_state *state,
837 enum xkb_state_component type,
838 enum xkb_state_match match,
842 xkb_mod_index_t idx = 0;
849 str = va_arg(ap, const char *);
852 idx = xkb_map_mod_get_index(state->keymap, str);
853 if (idx == XKB_MOD_INVALID) {
857 wanted |= (1 << idx);
864 return match_mod_masks(state, match, wanted);
868 * Returns 1 if the given group is active with the specified type(s), 0 if
869 * not, or -1 if the group is invalid.
872 xkb_state_group_index_is_active(struct xkb_state *state,
873 xkb_group_index_t idx,
874 enum xkb_state_component type)
878 if (idx >= xkb_map_num_groups(state->keymap))
881 if (type & XKB_STATE_DEPRESSED)
882 ret |= (state->base_group == idx);
883 if (type & XKB_STATE_LATCHED)
884 ret |= (state->latched_group == idx);
885 if (type & XKB_STATE_LOCKED)
886 ret |= (state->locked_group == idx);
892 * Returns 1 if the given modifier is active with the specified type(s), 0 if
893 * not, or -1 if the modifier is invalid.
896 xkb_state_group_name_is_active(struct xkb_state *state, const char *name,
897 enum xkb_state_component type)
899 xkb_group_index_t idx = xkb_map_group_get_index(state->keymap, name);
901 if (idx == XKB_GROUP_INVALID)
904 return xkb_state_group_index_is_active(state, idx, type);
908 * Returns 1 if the given LED is active, 0 if not, or -1 if the LED is invalid.
911 xkb_state_led_index_is_active(struct xkb_state *state, xkb_led_index_t idx)
913 if (idx >= xkb_map_num_leds(state->keymap))
916 return !!(state->leds & (1 << idx));
920 * Returns 1 if the given LED is active, 0 if not, or -1 if the LED is invalid.
923 xkb_state_led_name_is_active(struct xkb_state *state, const char *name)
925 xkb_led_index_t idx = xkb_map_led_get_index(state->keymap, name);
927 if (idx == XKB_LED_INVALID)
930 return xkb_state_led_index_is_active(state, idx);