summaryrefslogtreecommitdiffstats
path: root/quantum/process_keycode/process_tap_dance.c
blob: c8712d919f2239497785909c324f97ae0f044f40 (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
/* Copyright 2016 Jack Humbert
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */
#include "quantum.h"

#ifndef NO_ACTION_ONESHOT
uint8_t get_oneshot_mods(void);
#endif

static uint16_t last_td;
static int8_t   highest_td = -1;

void qk_tap_dance_pair_on_each_tap(qk_tap_dance_state_t *state, void *user_data) {
    qk_tap_dance_pair_t *pair = (qk_tap_dance_pair_t *)user_data;

    if (state->count == 2) {
        register_code16(pair->kc2);
        state->finished = true;
    }
}

void qk_tap_dance_pair_finished(qk_tap_dance_state_t *state, void *user_data) {
    qk_tap_dance_pair_t *pair = (qk_tap_dance_pair_t *)user_data;

    if (state->count == 1) {
        register_code16(pair->kc1);
    } else if (state->count == 2) {
        register_code16(pair->kc2);
    }
}

void qk_tap_dance_pair_reset(qk_tap_dance_state_t *state, void *user_data) {
    qk_tap_dance_pair_t *pair = (qk_tap_dance_pair_t *)user_data;

    if (state->count == 1) {
        unregister_code16(pair->kc1);
    } else if (state->count == 2) {
        unregister_code16(pair->kc2);
    }
}

void qk_tap_dance_dual_role_on_each_tap(qk_tap_dance_state_t *state, void *user_data) {
    qk_tap_dance_dual_role_t *pair = (qk_tap_dance_dual_role_t *)user_data;

    if (state->count == 2) {
        layer_move(pair->layer);
        state->finished = true;
    }
}

void qk_tap_dance_dual_role_finished(qk_tap_dance_state_t *state, void *user_data) {
    qk_tap_dance_dual_role_t *pair = (qk_tap_dance_dual_role_t *)user_data;

    if (state->count == 1) {
        register_code16(pair->kc);
    } else if (state->count == 2) {
        pair->layer_function(pair->layer);
    }
}

void qk_tap_dance_dual_role_reset(qk_tap_dance_state_t *state, void *user_data) {
    qk_tap_dance_dual_role_t *pair = (qk_tap_dance_dual_role_t *)user_data;

    if (state->count == 1) {
        unregister_code16(pair->kc);
    }
}

static inline void _process_tap_dance_action_fn(qk_tap_dance_state_t *state, void *user_data, qk_tap_dance_user_fn_t fn) {
    if (fn) {
        fn(state, user_data);
    }
}

static inline void process_tap_dance_action_on_each_tap(qk_tap_dance_action_t *action) { _process_tap_dance_action_fn(&action->state, action->user_data, action->fn.on_each_tap); }

static inline void process_tap_dance_action_on_dance_finished(qk_tap_dance_action_t *action) {
    if (action->state.finished) return;
    action->state.finished = true;
    add_mods(action->state.oneshot_mods);
    add_weak_mods(action->state.weak_mods);
    send_keyboard_report();
    _process_tap_dance_action_fn(&action->state, action->user_data, action->fn.on_dance_finished);
}

static inline void process_tap_dance_action_on_reset(qk_tap_dance_action_t *action) {
    _process_tap_dance_action_fn(&action->state, action->user_data, action->fn.on_reset);
    del_mods(action->state.oneshot_mods);
    del_weak_mods(action->state.weak_mods);
    send_keyboard_report();
}

void preprocess_tap_dance(uint16_t keycode, keyrecord_t *record) {
    qk_tap_dance_action_t *action;

    if (!record->event.pressed) return;

    if (highest_td == -1) return;

    for (int i = 0; i <= highest_td; i++) {
        action = &tap_dance_actions[i];
        if (action->state.count) {
            if (keycode == action->state.keycode && keycode == last_td) continue;
            action->state.interrupted          = true;
            action->state.interrupting_keycode = keycode;
            process_tap_dance_action_on_dance_finished(action);
            reset_tap_dance(&action->state);

            // Tap dance actions can leave some weak mods active (e.g., if the tap dance is mapped to a keycode with
            // modifiers), but these weak mods should not affect the keypress which interrupted the tap dance.
            clear_weak_mods();
        }
    }
}

bool process_tap_dance(uint16_t keycode, keyrecord_t *record) {
    uint16_t               idx = keycode - QK_TAP_DANCE;
    qk_tap_dance_action_t *action;

    switch (keycode) {
        case QK_TAP_DANCE ... QK_TAP_DANCE_MAX:
            if ((int16_t)idx > highest_td) highest_td = idx;
            action = &tap_dance_actions[idx];

            action->state.pressed = record->event.pressed;
            if (record->event.pressed) {
                action->state.keycode = keycode;
                action->state.count++;
                action->state.timer = timer_read();
#ifndef NO_ACTION_ONESHOT
                action->state.oneshot_mods = get_oneshot_mods();
#else
                action->state.oneshot_mods = 0;
#endif
                action->state.weak_mods = get_mods();
                action->state.weak_mods |= get_weak_mods();
                process_tap_dance_action_on_each_tap(action);

                last_td = keycode;
            } else {
                if (action->state.count && action->state.finished) {
                    reset_tap_dance(&action->state);
                }
            }

            break;
    }

    return true;
}

void tap_dance_task() {
    if (highest_td == -1) return;
    uint16_t tap_user_defined;

    for (uint8_t i = 0; i <= highest_td; i++) {
        qk_tap_dance_action_t *action = &tap_dance_actions[i];
        if (action->custom_tapping_term > 0) {
            tap_user_defined = action->custom_tapping_term;
        } else {
#ifdef TAPPING_TERM_PER_KEY
            tap_user_defined = get_tapping_term(action->state.keycode, NULL);
#else
            tap_user_defined = TAPPING_TERM;
#endif
        }
        if (action->state.count && timer_elapsed(action->state.timer) > tap_user_defined) {
            process_tap_dance_action_on_dance_finished(action);
            reset_tap_dance(&action->state);
        }
    }
}

void reset_tap_dance(qk_tap_dance_state_t *state) {
    qk_tap_dance_action_t *action;

    if (state->pressed) return;

    action = &tap_dance_actions[state->keycode - QK_TAP_DANCE];

    process_tap_dance_action_on_reset(action);

    state->count                = 0;
    state->interrupted          = false;
    state->finished             = false;
    state->interrupting_keycode = 0;
    last_td                     = 0;
}