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
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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)
65 union xkb_action action;
66 const struct xkb_key *key;
68 int (*func)(struct xkb_state *state,
69 struct xkb_filter *filter,
70 const struct xkb_key *key,
71 enum xkb_key_direction direction);
76 /* These may be negative, because of -1 group actions. */
77 int32_t base_group; /**< depressed */
78 int32_t latched_group;
80 xkb_layout_index_t group; /**< effective */
82 xkb_mod_mask_t base_mods; /**< depressed */
83 xkb_mod_mask_t latched_mods;
84 xkb_mod_mask_t locked_mods;
85 xkb_mod_mask_t mods; /**< effective */
88 * At each event, we accumulate all the needed modifications to the base
89 * modifiers, and apply them at the end. These keep track of this state.
91 xkb_mod_mask_t set_mods;
92 xkb_mod_mask_t clear_mods;
94 * We mustn't clear a base modifier if there's another depressed key
95 * which affects it, e.g. given this sequence
96 * < Left Shift down, Right Shift down, Left Shift Up >
97 * the modifier should still be set. This keeps the count.
99 int16_t mod_key_count[sizeof(xkb_mod_mask_t) * 8];
104 darray(struct xkb_filter) filters;
105 struct xkb_keymap *keymap;
108 static struct xkb_kt_map_entry *
109 get_entry_for_key_state(struct xkb_state *state, const struct xkb_key *key,
110 xkb_layout_index_t group)
112 struct xkb_key_type *type;
113 xkb_mod_mask_t active_mods;
116 type = XkbKeyType(state->keymap, key, group);
117 active_mods = xkb_state_serialize_mods(state, XKB_STATE_EFFECTIVE);
118 active_mods &= type->mods.mask;
120 for (i = 0; i < type->num_entries; i++)
121 if (type->map[i].mods.mask == active_mods)
122 return &type->map[i];
128 * Returns the level to use for the given key and state, or
131 XKB_EXPORT xkb_level_index_t
132 xkb_state_key_get_level(struct xkb_state *state, xkb_keycode_t kc,
133 xkb_layout_index_t layout)
135 const struct xkb_key *key = XkbKey(state->keymap, kc);
136 struct xkb_kt_map_entry *entry;
138 if (!key || layout >= key->num_groups)
139 return XKB_LEVEL_INVALID;
141 /* If we don't find an explicit match the default is 0. */
142 entry = get_entry_for_key_state(state, key, layout);
149 static xkb_layout_index_t
150 wrap_group_into_range(int32_t group,
151 xkb_layout_index_t num_groups,
152 enum xkb_range_exceed_type out_of_range_group_action,
153 xkb_layout_index_t out_of_range_group_number)
156 return XKB_LAYOUT_INVALID;
158 if (group < num_groups)
161 switch (out_of_range_group_action) {
163 if (out_of_range_group_number >= num_groups)
165 return out_of_range_group_number;
171 return num_groups - 1;
176 * C99 says a negative dividend in a modulo operation always
177 * gives a negative result.
180 return ((int) num_groups + (group % (int) num_groups));
182 return group % num_groups;
187 * Returns the layout to use for the given key and state, taking
188 * wrapping/clamping/etc into account, or XKB_LAYOUT_INVALID.
190 XKB_EXPORT xkb_layout_index_t
191 xkb_state_key_get_layout(struct xkb_state *state, xkb_keycode_t kc)
193 xkb_layout_index_t group =
194 xkb_state_serialize_layout(state, XKB_STATE_EFFECTIVE);
195 const struct xkb_key *key = XkbKey(state->keymap, kc);
198 return XKB_LAYOUT_INVALID;
200 return wrap_group_into_range(group, key->num_groups,
201 key->out_of_range_group_action,
202 key->out_of_range_group_number);
205 static const union xkb_action fake = { .type = ACTION_TYPE_NONE };
207 static const union xkb_action *
208 xkb_key_get_action(struct xkb_state *state, const struct xkb_key *key)
210 xkb_layout_index_t layout;
211 xkb_level_index_t level;
216 layout = xkb_state_key_get_layout(state, key->keycode);
217 if (layout == XKB_LAYOUT_INVALID)
220 level = xkb_state_key_get_level(state, key->keycode, layout);
221 if (level == XKB_LEVEL_INVALID)
224 return XkbKeyActionEntry(key, layout, level);
227 static struct xkb_filter *
228 xkb_filter_new(struct xkb_state *state)
230 struct xkb_filter *filter = NULL, *iter;
232 darray_foreach(iter, state->filters) {
240 darray_resize0(state->filters, darray_size(state->filters) + 1);
241 filter = &darray_item(state->filters, darray_size(state->filters) -1);
248 /***====================================================================***/
251 xkb_filter_group_set_func(struct xkb_state *state,
252 struct xkb_filter *filter,
253 const struct xkb_key *key,
254 enum xkb_key_direction direction)
256 if (key != filter->key) {
257 filter->action.group.flags &= ~ACTION_LOCK_CLEAR;
261 if (direction == XKB_KEY_DOWN) {
265 else if (--filter->refcnt > 0) {
269 state->base_group = filter->priv;
271 if (filter->action.group.flags & ACTION_LOCK_CLEAR)
272 state->locked_group = 0;
279 xkb_filter_group_set_new(struct xkb_state *state, struct xkb_filter *filter)
281 filter->priv = state->base_group;
282 if (filter->action.group.flags & ACTION_ABSOLUTE_SWITCH)
283 state->base_group = filter->action.group.group;
285 state->base_group += filter->action.group.group;
289 xkb_filter_group_lock_func(struct xkb_state *state,
290 struct xkb_filter *filter,
291 const struct xkb_key *key,
292 enum xkb_key_direction direction)
294 if (key != filter->key)
297 if (direction == XKB_KEY_DOWN) {
301 if (--filter->refcnt > 0)
309 xkb_filter_group_lock_new(struct xkb_state *state, struct xkb_filter *filter)
311 if (filter->action.group.flags & ACTION_ABSOLUTE_SWITCH)
312 state->locked_group = filter->action.group.group;
314 state->locked_group += filter->action.group.group;
318 xkb_filter_mod_set_func(struct xkb_state *state,
319 struct xkb_filter *filter,
320 const struct xkb_key *key,
321 enum xkb_key_direction direction)
323 if (key != filter->key) {
324 filter->action.mods.flags &= ~ACTION_LOCK_CLEAR;
328 if (direction == XKB_KEY_DOWN) {
332 else if (--filter->refcnt > 0) {
336 state->clear_mods = filter->action.mods.mods.mask;
337 if (filter->action.mods.flags & ACTION_LOCK_CLEAR)
338 state->locked_mods &= ~filter->action.mods.mods.mask;
345 xkb_filter_mod_set_new(struct xkb_state *state, struct xkb_filter *filter)
347 state->set_mods = filter->action.mods.mods.mask;
351 xkb_filter_mod_lock_func(struct xkb_state *state,
352 struct xkb_filter *filter,
353 const struct xkb_key *key,
354 enum xkb_key_direction direction)
356 if (key != filter->key)
359 if (direction == XKB_KEY_DOWN) {
363 if (--filter->refcnt > 0)
366 state->clear_mods |= filter->action.mods.mods.mask;
367 if (!(filter->action.mods.flags & ACTION_LOCK_NO_UNLOCK))
368 state->locked_mods &= ~filter->priv;
375 xkb_filter_mod_lock_new(struct xkb_state *state, struct xkb_filter *filter)
377 filter->priv = state->locked_mods & filter->action.mods.mods.mask;
378 state->set_mods |= filter->action.mods.mods.mask;
379 if (!(filter->action.mods.flags & ACTION_LOCK_NO_LOCK))
380 state->locked_mods |= filter->action.mods.mods.mask;
383 enum xkb_key_latch_state {
390 xkb_action_breaks_latch(const union xkb_action *action)
392 switch (action->type) {
393 case ACTION_TYPE_NONE:
394 case ACTION_TYPE_PTR_BUTTON:
395 case ACTION_TYPE_PTR_LOCK:
396 case ACTION_TYPE_CTRL_SET:
397 case ACTION_TYPE_CTRL_LOCK:
398 case ACTION_TYPE_KEY_REDIRECT:
399 case ACTION_TYPE_SWITCH_VT:
400 case ACTION_TYPE_TERMINATE:
408 xkb_filter_mod_latch_func(struct xkb_state *state,
409 struct xkb_filter *filter,
410 const struct xkb_key *key,
411 enum xkb_key_direction direction)
413 enum xkb_key_latch_state latch = filter->priv;
415 if (direction == XKB_KEY_DOWN && latch == LATCH_PENDING) {
416 /* If this is a new keypress and we're awaiting our single latched
417 * keypress, then either break the latch if any random key is pressed,
418 * or promote it to a lock or plain base set if it's the same
420 const union xkb_action *action = xkb_key_get_action(state, key);
421 if (action->type == ACTION_TYPE_MOD_LATCH &&
422 action->mods.flags == filter->action.mods.flags &&
423 action->mods.mods.mask == filter->action.mods.mods.mask) {
424 filter->action = *action;
425 if (filter->action.mods.flags & ACTION_LATCH_TO_LOCK) {
426 filter->action.type = ACTION_TYPE_MOD_LOCK;
427 filter->func = xkb_filter_mod_lock_func;
428 state->locked_mods |= filter->action.mods.mods.mask;
431 filter->action.type = ACTION_TYPE_MOD_SET;
432 filter->func = xkb_filter_mod_set_func;
433 state->set_mods = filter->action.mods.mods.mask;
436 state->latched_mods &= ~filter->action.mods.mods.mask;
440 else if (xkb_action_breaks_latch(action)) {
441 /* XXX: This may be totally broken, we might need to break the
442 * latch in the next run after this press? */
443 state->latched_mods &= ~filter->action.mods.mods.mask;
448 else if (direction == XKB_KEY_UP && key == filter->key) {
449 /* Our key got released. If we've set it to clear locks, and we
450 * currently have the same modifiers locked, then release them and
451 * don't actually latch. Else we've actually hit the latching
452 * stage, so set PENDING and move our modifier from base to
454 if (latch == NO_LATCH ||
455 ((filter->action.mods.flags & ACTION_LOCK_CLEAR) &&
456 (state->locked_mods & filter->action.mods.mods.mask) ==
457 filter->action.mods.mods.mask)) {
458 /* XXX: We might be a bit overenthusiastic about clearing
459 * mods other filters have set here? */
460 if (latch == LATCH_PENDING)
461 state->latched_mods &= ~filter->action.mods.mods.mask;
463 state->clear_mods = filter->action.mods.mods.mask;
464 state->locked_mods &= ~filter->action.mods.mods.mask;
468 latch = LATCH_PENDING;
469 state->clear_mods = filter->action.mods.mods.mask;
470 state->latched_mods |= filter->action.mods.mods.mask;
474 else if (direction == XKB_KEY_DOWN && latch == LATCH_KEY_DOWN) {
475 /* Someone's pressed another key while we've still got the latching
476 * key held down, so keep the base modifier state active (from
477 * xkb_filter_mod_latch_new), but don't trip the latch, just clear
478 * it as soon as the modifier gets released. */
482 filter->priv = latch;
488 xkb_filter_mod_latch_new(struct xkb_state *state, struct xkb_filter *filter)
490 filter->priv = LATCH_KEY_DOWN;
491 state->set_mods = filter->action.mods.mods.mask;
494 static const struct {
495 void (*new)(struct xkb_state *state, struct xkb_filter *filter);
496 int (*func)(struct xkb_state *state, struct xkb_filter *filter,
497 const struct xkb_key *key, enum xkb_key_direction direction);
498 } filter_action_funcs[_ACTION_TYPE_NUM_ENTRIES] = {
499 [ACTION_TYPE_MOD_SET] = { xkb_filter_mod_set_new,
500 xkb_filter_mod_set_func },
501 [ACTION_TYPE_MOD_LATCH] = { xkb_filter_mod_latch_new,
502 xkb_filter_mod_latch_func },
503 [ACTION_TYPE_MOD_LOCK] = { xkb_filter_mod_lock_new,
504 xkb_filter_mod_lock_func },
505 [ACTION_TYPE_GROUP_SET] = { xkb_filter_group_set_new,
506 xkb_filter_group_set_func },
507 [ACTION_TYPE_GROUP_LOCK] = { xkb_filter_group_lock_new,
508 xkb_filter_group_lock_func },
512 * Applies any relevant filters to the key, first from the list of filters
513 * that are currently active, then if no filter has claimed the key, possibly
514 * apply a new filter from the key action.
517 xkb_filter_apply_all(struct xkb_state *state,
518 const struct xkb_key *key,
519 enum xkb_key_direction direction)
521 struct xkb_filter *filter;
522 const union xkb_action *action;
525 /* First run through all the currently active filters and see if any of
526 * them have claimed this event. */
527 darray_foreach(filter, state->filters) {
530 send &= filter->func(state, filter, key, direction);
533 if (!send || direction == XKB_KEY_UP)
536 action = xkb_key_get_action(state, key);
537 if (!filter_action_funcs[action->type].new)
540 filter = xkb_filter_new(state);
545 filter->func = filter_action_funcs[action->type].func;
546 filter->action = *action;
547 filter_action_funcs[action->type].new(state, filter);
550 XKB_EXPORT struct xkb_state *
551 xkb_state_new(struct xkb_keymap *keymap)
553 struct xkb_state *ret;
555 ret = calloc(sizeof(*ret), 1);
560 ret->keymap = xkb_keymap_ref(keymap);
565 XKB_EXPORT struct xkb_state *
566 xkb_state_ref(struct xkb_state *state)
573 xkb_state_unref(struct xkb_state *state)
575 if (--state->refcnt > 0)
578 xkb_keymap_unref(state->keymap);
579 darray_free(state->filters);
583 XKB_EXPORT struct xkb_keymap *
584 xkb_state_get_keymap(struct xkb_state *state)
586 return state->keymap;
590 * Update the LED state to match the rest of the xkb_state.
593 xkb_state_led_update_all(struct xkb_state *state)
599 for (led = 0; led < XKB_NUM_INDICATORS; led++) {
600 struct xkb_indicator_map *map = &state->keymap->indicators[led];
601 xkb_mod_mask_t mod_mask = 0;
602 uint32_t group_mask = 0;
604 if (map->which_mods & XKB_STATE_DEPRESSED)
605 mod_mask |= state->base_mods;
606 if (map->which_mods & XKB_STATE_LATCHED)
607 mod_mask |= state->latched_mods;
608 if (map->which_mods & XKB_STATE_LOCKED)
609 mod_mask |= state->locked_mods;
610 if ((map->mods.mask & mod_mask))
611 state->leds |= (1 << led);
613 if (map->which_groups & XKB_STATE_DEPRESSED)
614 group_mask |= (1 << state->base_group);
615 if (map->which_groups & XKB_STATE_LATCHED)
616 group_mask |= (1 << state->latched_group);
617 if (map->which_groups & XKB_STATE_LOCKED)
618 group_mask |= (1 << state->locked_group);
619 if ((map->groups & group_mask))
620 state->leds |= (1 << led);
623 if ((map->ctrls & state->keymap->enabled_ctrls))
624 state->leds |= (1 << led);
630 * Calculates the derived state (effective mods/group and LEDs) from an
631 * up-to-date xkb_state.
634 xkb_state_update_derived(struct xkb_state *state)
636 xkb_layout_index_t num_groups = xkb_keymap_num_layouts(state->keymap);
638 state->mods = (state->base_mods |
639 state->latched_mods |
642 /* TODO: Use groups_wrap control instead of always RANGE_WRAP. */
644 state->locked_group = wrap_group_into_range(state->locked_group,
648 state->group = wrap_group_into_range(state->base_group +
649 state->latched_group +
654 xkb_state_led_update_all(state);
658 * Given a particular key event, updates the state structure to reflect the
662 xkb_state_update_key(struct xkb_state *state, xkb_keycode_t kc,
663 enum xkb_key_direction direction)
667 const struct xkb_key *key = XkbKey(state->keymap, kc);
673 state->clear_mods = 0;
675 xkb_filter_apply_all(state, key, direction);
677 for (i = 0, bit = 1; state->set_mods; i++, bit <<= 1) {
678 if (state->set_mods & bit) {
679 state->mod_key_count[i]++;
680 state->base_mods |= bit;
681 state->set_mods &= ~bit;
685 for (i = 0, bit = 1; state->clear_mods; i++, bit <<= 1) {
686 if (state->clear_mods & bit) {
687 state->mod_key_count[i]--;
688 if (state->mod_key_count[i] <= 0) {
689 state->base_mods &= ~bit;
690 state->mod_key_count[i] = 0;
692 state->clear_mods &= ~bit;
696 xkb_state_update_derived(state);
700 * Updates the state from a set of explicit masks as gained from
701 * xkb_state_serialize_mods and xkb_state_serialize_groups. As noted in the
702 * documentation for these functions in xkbcommon.h, this round-trip is
703 * lossy, and should only be used to update a slave state mirroring the
704 * master, e.g. in a client/server window system.
707 xkb_state_update_mask(struct xkb_state *state,
708 xkb_mod_mask_t base_mods,
709 xkb_mod_mask_t latched_mods,
710 xkb_mod_mask_t locked_mods,
711 xkb_layout_index_t base_group,
712 xkb_layout_index_t latched_group,
713 xkb_layout_index_t locked_group)
715 xkb_mod_index_t num_mods;
718 state->base_mods = 0;
719 state->latched_mods = 0;
720 state->locked_mods = 0;
721 num_mods = xkb_keymap_num_mods(state->keymap);
723 for (idx = 0; idx < num_mods; idx++) {
724 xkb_mod_mask_t mod = (1 << idx);
726 state->base_mods |= mod;
727 if (latched_mods & mod)
728 state->latched_mods |= mod;
729 if (locked_mods & mod)
730 state->locked_mods |= mod;
733 state->base_group = base_group;
734 state->latched_group = latched_group;
735 state->locked_group = locked_group;
737 xkb_state_update_derived(state);
741 * Provides the symbols to use for the given key and state. Returns the
742 * number of symbols pointed to in syms_out.
745 xkb_state_key_get_syms(struct xkb_state *state, xkb_keycode_t kc,
746 const xkb_keysym_t **syms_out)
748 xkb_layout_index_t layout;
749 xkb_level_index_t level;
750 const struct xkb_key *key = XkbKey(state->keymap, kc);
755 layout = xkb_state_key_get_layout(state, kc);
756 if (layout == XKB_LAYOUT_INVALID)
759 level = xkb_state_key_get_level(state, kc, layout);
760 if (level == XKB_LEVEL_INVALID)
763 return xkb_keymap_key_get_syms_by_level(state->keymap, kc, layout, level,
772 * Serialises the requested modifier state into an xkb_mod_mask_t, with all
773 * the same disclaimers as in xkb_state_update_mask.
775 XKB_EXPORT xkb_mod_mask_t
776 xkb_state_serialize_mods(struct xkb_state *state,
777 enum xkb_state_component type)
779 xkb_mod_mask_t ret = 0;
781 if (type == XKB_STATE_EFFECTIVE)
784 if (type & XKB_STATE_DEPRESSED)
785 ret |= state->base_mods;
786 if (type & XKB_STATE_LATCHED)
787 ret |= state->latched_mods;
788 if (type & XKB_STATE_LOCKED)
789 ret |= state->locked_mods;
795 * Serialises the requested group state, with all the same disclaimers as
796 * in xkb_state_update_mask.
798 XKB_EXPORT xkb_layout_index_t
799 xkb_state_serialize_layout(struct xkb_state *state,
800 enum xkb_state_component type)
802 xkb_layout_index_t ret = 0;
804 if (type == XKB_STATE_EFFECTIVE)
807 if (type & XKB_STATE_DEPRESSED)
808 ret += state->base_group;
809 if (type & XKB_STATE_LATCHED)
810 ret += state->latched_group;
811 if (type & XKB_STATE_LOCKED)
812 ret += state->locked_group;
818 * Returns 1 if the given modifier is active with the specified type(s), 0 if
819 * not, or -1 if the modifier is invalid.
822 xkb_state_mod_index_is_active(struct xkb_state *state,
824 enum xkb_state_component type)
828 if (idx >= xkb_keymap_num_mods(state->keymap))
831 if (type & XKB_STATE_EFFECTIVE)
832 return !!(state->mods & (1 << idx));
834 if (type & XKB_STATE_DEPRESSED)
835 ret |= (state->base_mods & (1 << idx));
836 if (type & XKB_STATE_LATCHED)
837 ret |= (state->latched_mods & (1 << idx));
838 if (type & XKB_STATE_LOCKED)
839 ret |= (state->locked_mods & (1 << idx));
845 * Helper function for xkb_state_mod_indices_are_active and
846 * xkb_state_mod_names_are_active.
849 match_mod_masks(struct xkb_state *state, enum xkb_state_match match,
852 uint32_t active = xkb_state_serialize_mods(state, XKB_STATE_EFFECTIVE);
854 if (!(match & XKB_STATE_MATCH_NON_EXCLUSIVE) && (active & ~wanted))
857 if (match & XKB_STATE_MATCH_ANY)
858 return !!(active & wanted);
860 return (active & wanted) == wanted;
866 * Returns 1 if the modifiers are active with the specified type(s), 0 if
867 * not, or -1 if any of the modifiers are invalid.
870 xkb_state_mod_indices_are_active(struct xkb_state *state,
871 enum xkb_state_component type,
872 enum xkb_state_match match,
876 xkb_mod_index_t idx = 0;
879 xkb_mod_index_t num_mods = xkb_keymap_num_mods(state->keymap);
883 idx = va_arg(ap, xkb_mod_index_t);
884 if (idx == XKB_MOD_INVALID)
886 if (idx >= num_mods) {
890 wanted |= (1 << idx);
897 return match_mod_masks(state, match, wanted);
901 * Returns 1 if the given modifier is active with the specified type(s), 0 if
902 * not, or -1 if the modifier is invalid.
905 xkb_state_mod_name_is_active(struct xkb_state *state, const char *name,
906 enum xkb_state_component type)
908 xkb_mod_index_t idx = xkb_keymap_mod_get_index(state->keymap, name);
910 if (idx == XKB_MOD_INVALID)
913 return xkb_state_mod_index_is_active(state, idx, type);
917 * Returns 1 if the modifiers are active with the specified type(s), 0 if
918 * not, or -1 if any of the modifiers are invalid.
920 XKB_EXPORT ATTR_NULL_SENTINEL int
921 xkb_state_mod_names_are_active(struct xkb_state *state,
922 enum xkb_state_component type,
923 enum xkb_state_match match,
927 xkb_mod_index_t idx = 0;
934 str = va_arg(ap, const char *);
937 idx = xkb_keymap_mod_get_index(state->keymap, str);
938 if (idx == XKB_MOD_INVALID) {
942 wanted |= (1 << idx);
949 return match_mod_masks(state, match, wanted);
953 * Returns 1 if the given group is active with the specified type(s), 0 if
954 * not, or -1 if the group is invalid.
957 xkb_state_layout_index_is_active(struct xkb_state *state,
958 xkb_layout_index_t idx,
959 enum xkb_state_component type)
963 if (idx >= xkb_keymap_num_layouts(state->keymap))
966 /* Can only have one effective group. */
967 if (type & XKB_STATE_EFFECTIVE)
968 return state->group == idx;
970 if (type & XKB_STATE_DEPRESSED)
971 ret |= (state->base_group == idx);
972 if (type & XKB_STATE_LATCHED)
973 ret |= (state->latched_group == idx);
974 if (type & XKB_STATE_LOCKED)
975 ret |= (state->locked_group == idx);
981 * Returns 1 if the given modifier is active with the specified type(s), 0 if
982 * not, or -1 if the modifier is invalid.
985 xkb_state_layout_name_is_active(struct xkb_state *state, const char *name,
986 enum xkb_state_component type)
988 xkb_layout_index_t idx = xkb_keymap_layout_get_index(state->keymap, name);
990 if (idx == XKB_LAYOUT_INVALID)
993 return xkb_state_layout_index_is_active(state, idx, type);
997 * Returns 1 if the given LED is active, 0 if not, or -1 if the LED is invalid.
1000 xkb_state_led_index_is_active(struct xkb_state *state, xkb_led_index_t idx)
1002 if (idx >= xkb_keymap_num_leds(state->keymap))
1005 return !!(state->leds & (1 << idx));
1009 * Returns 1 if the given LED is active, 0 if not, or -1 if the LED is invalid.
1012 xkb_state_led_name_is_active(struct xkb_state *state, const char *name)
1014 xkb_led_index_t idx = xkb_keymap_led_get_index(state->keymap, name);
1016 if (idx == XKB_LED_INVALID)
1019 return xkb_state_led_index_is_active(state, idx);
1022 static xkb_mod_mask_t
1023 key_get_consumed(struct xkb_state *state, const struct xkb_key *key)
1025 struct xkb_kt_map_entry *entry;
1026 xkb_layout_index_t group;
1028 group = xkb_state_key_get_layout(state, key->keycode);
1029 if (group == XKB_LAYOUT_INVALID)
1032 entry = get_entry_for_key_state(state, key, group);
1036 return entry->mods.mask & ~entry->preserve.mask;
1040 * Tests to see if a modifier is used up by our translation of a
1041 * keycode to keysyms, taking note of the current modifier state and
1042 * the appropriate key type's preserve information, if any. This allows
1043 * the user to mask out the modifier in later processing of the
1044 * modifiers, e.g. when implementing hot keys or accelerators.
1046 * See also, for example:
1047 * - XkbTranslateKeyCode(3), mod_rtrn retrun value, from libX11.
1048 * - gdk_keymap_translate_keyboard_state, consumed_modifiers return value,
1052 xkb_state_mod_index_is_consumed(struct xkb_state *state, xkb_keycode_t kc,
1053 xkb_mod_index_t idx)
1055 const struct xkb_key *key = XkbKey(state->keymap, kc);
1060 return !!((1 << idx) & key_get_consumed(state, key));
1064 * Calculates which modifiers should be consumed during key processing,
1065 * and returns the mask with all these modifiers removed. e.g. if
1066 * given a state of Alt and Shift active for a two-level alphabetic
1067 * key containing plus and equal on the first and second level
1068 * respectively, will return a mask of only Alt, as Shift has been
1069 * consumed by the type handling.
1071 XKB_EXPORT xkb_mod_mask_t
1072 xkb_state_mod_mask_remove_consumed(struct xkb_state *state, xkb_keycode_t kc,
1073 xkb_mod_mask_t mask)
1075 const struct xkb_key *key = XkbKey(state->keymap, kc);
1080 return mask & ~key_get_consumed(state, key);