summaryrefslogtreecommitdiffstats
path: root/quantum/mousekey.c
blob: b91db80de6ba469a521f6f48a48501229d9be86a (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
/*
 * Copyright 2011 Jun Wako <wakojun@gmail.com>
 *
 * 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 <stdint.h>
#include <string.h>
#include "keycode.h"
#include "host.h"
#include "timer.h"
#include "print.h"
#include "debug.h"
#include "mousekey.h"

inline int8_t times_inv_sqrt2(int8_t x) {
    // 181/256 is pretty close to 1/sqrt(2)
    // 0.70703125                 0.707106781
    // 1 too small for x=99 and x=198
    // This ends up being a mult and discard lower 8 bits
    return (x * 181) >> 8;
}

static report_mouse_t mouse_report = {0};
static void           mousekey_debug(void);
static uint8_t        mousekey_accel        = 0;
static uint8_t        mousekey_repeat       = 0;
static uint8_t        mousekey_wheel_repeat = 0;
#ifdef MOUSEKEY_INERTIA
static uint8_t mousekey_frame     = 0; // track whether gesture is inactive, first frame, or repeating
static int8_t  mousekey_x_dir     = 0; // -1 / 0 / 1 = left / neutral / right
static int8_t  mousekey_y_dir     = 0; // -1 / 0 / 0 = up / neutral / down
static int8_t  mousekey_x_inertia = 0; // current velocity, limit +/- MOUSEKEY_TIME_TO_MAX
static int8_t  mousekey_y_inertia = 0; // ...
#endif
#ifdef MK_KINETIC_SPEED
static uint16_t mouse_timer = 0;
#endif

#ifndef MK_3_SPEED

static uint16_t last_timer_c = 0;
static uint16_t last_timer_w = 0;

/*
 * Mouse keys acceleration algorithm
 *  http://en.wikipedia.org/wiki/Mouse_keys
 *
 *  speed = delta * max_speed * (repeat / time_to_max)**((1000+curve)/1000)
 */
/* milliseconds between the initial key press and first repeated motion event (0-2550) */
uint8_t mk_delay = MOUSEKEY_DELAY / 10;
/* milliseconds between repeated motion events (0-255) */
uint8_t mk_interval = MOUSEKEY_INTERVAL;
/* steady speed (in action_delta units) applied each event (0-255) */
uint8_t mk_max_speed = MOUSEKEY_MAX_SPEED;
/* number of events (count) accelerating to steady speed (0-255) */
uint8_t mk_time_to_max = MOUSEKEY_TIME_TO_MAX;
/* ramp used to reach maximum pointer speed (NOT SUPPORTED) */
// int8_t mk_curve = 0;
/* wheel params */
/* milliseconds between the initial key press and first repeated motion event (0-2550) */
uint8_t mk_wheel_delay = MOUSEKEY_WHEEL_DELAY / 10;
/* milliseconds between repeated motion events (0-255) */
#    ifdef MK_KINETIC_SPEED
float mk_wheel_interval = 1000.0f / MOUSEKEY_WHEEL_INITIAL_MOVEMENTS;
#    else
uint8_t mk_wheel_interval = MOUSEKEY_WHEEL_INTERVAL;
#    endif
uint8_t mk_wheel_max_speed   = MOUSEKEY_WHEEL_MAX_SPEED;
uint8_t mk_wheel_time_to_max = MOUSEKEY_WHEEL_TIME_TO_MAX;

#    ifndef MK_COMBINED
#        ifndef MK_KINETIC_SPEED
#            ifndef MOUSEKEY_INERTIA

/* Default accelerated mode */

static uint8_t move_unit(void) {
    uint16_t unit;
    if (mousekey_accel & (1 << 0)) {
        unit = (MOUSEKEY_MOVE_DELTA * mk_max_speed) / 4;
    } else if (mousekey_accel & (1 << 1)) {
        unit = (MOUSEKEY_MOVE_DELTA * mk_max_speed) / 2;
    } else if (mousekey_accel & (1 << 2)) {
        unit = (MOUSEKEY_MOVE_DELTA * mk_max_speed);
    } else if (mousekey_repeat == 0) {
        unit = MOUSEKEY_MOVE_DELTA;
    } else if (mousekey_repeat >= mk_time_to_max) {
        unit = MOUSEKEY_MOVE_DELTA * mk_max_speed;
    } else {
        unit = (MOUSEKEY_MOVE_DELTA * mk_max_speed * mousekey_repeat) / mk_time_to_max;
    }
    return (unit > MOUSEKEY_MOVE_MAX ? MOUSEKEY_MOVE_MAX : (unit == 0 ? 1 : unit));
}

#            else // MOUSEKEY_INERTIA mode

static int8_t move_unit(uint8_t axis) {
    int16_t unit;

    // handle X or Y axis
    int8_t inertia, dir;
    if (axis) {
        inertia = mousekey_y_inertia;
        dir     = mousekey_y_dir;
    } else {
        inertia = mousekey_x_inertia;
        dir     = mousekey_x_dir;
    }

    if (mousekey_frame < 2) { // first frame(s): initial keypress moves one pixel
        mousekey_frame = 1;
        unit           = dir * MOUSEKEY_MOVE_DELTA;
    } else { // acceleration
        // linear acceleration (is here for reference, but doesn't feel as good during use)
        // unit = (MOUSEKEY_MOVE_DELTA * mk_max_speed * inertia) / mk_time_to_max;

        // x**2 acceleration (quadratic, more precise for short movements)
        int16_t percent = (inertia << 8) / mk_time_to_max;
        percent         = (percent * percent) >> 8;
        if (inertia < 0) percent = -percent;

        // unit = sign(inertia) + (percent of max speed)
        if (inertia > 0)
            unit = 1;
        else if (inertia < 0)
            unit = -1;
        else
            unit = 0;

        unit = unit + ((mk_max_speed * percent) >> 8);
    }

    if (unit > MOUSEKEY_MOVE_MAX)
        unit = MOUSEKEY_MOVE_MAX;
    else if (unit < -MOUSEKEY_MOVE_MAX)
        unit = -MOUSEKEY_MOVE_MAX;
    return unit;
}

#            endif // end MOUSEKEY_INERTIA mode

static uint8_t wheel_unit(void) {
    uint16_t unit;
    if (mousekey_accel & (1 << 0)) {
        unit = (MOUSEKEY_WHEEL_DELTA * mk_wheel_max_speed) / 4;
    } else if (mousekey_accel & (1 << 1)) {
        unit = (MOUSEKEY_WHEEL_DELTA * mk_wheel_max_speed) / 2;
    } else if (mousekey_accel & (1 << 2)) {
        unit = (MOUSEKEY_WHEEL_DELTA * mk_wheel_max_speed);
    } else if (mousekey_wheel_repeat == 0) {
        unit = MOUSEKEY_WHEEL_DELTA;
    } else if (mousekey_wheel_repeat >= mk_wheel_time_to_max) {
        unit = MOUSEKEY_WHEEL_DELTA * mk_wheel_max_speed;
    } else {
        unit = (MOUSEKEY_WHEEL_DELTA * mk_wheel_max_speed * mousekey_wheel_repeat) / mk_wheel_time_to_max;
    }
    return (unit > MOUSEKEY_WHEEL_MAX ? MOUSEKEY_WHEEL_MAX : (unit == 0 ? 1 : unit));
}

#        else /* #ifndef MK_KINETIC_SPEED */

/*
 * Kinetic movement  acceleration algorithm
 *
 *  current speed = I + A * T/50 + A * 0.5 * T^2 | maximum B
 *
 * T: time since the mouse movement started
 * E: mouse events per second (set through MOUSEKEY_INTERVAL, UHK sends 250, the
 *    pro micro on my Signum 3.0 sends only 125!)
 * I: initial speed at time 0
 * A: acceleration
 * B: base mouse travel speed
 */
const uint16_t mk_accelerated_speed = MOUSEKEY_ACCELERATED_SPEED;
const uint16_t mk_base_speed        = MOUSEKEY_BASE_SPEED;
const uint16_t mk_decelerated_speed = MOUSEKEY_DECELERATED_SPEED;
const uint16_t mk_initial_speed     = MOUSEKEY_INITIAL_SPEED;

static uint8_t move_unit(void) {
    float speed = mk_initial_speed;

    if (mousekey_accel & ((1 << 0) | (1 << 2))) {
        speed = mousekey_accel & (1 << 2) ? mk_accelerated_speed : mk_decelerated_speed;
    } else if (mousekey_repeat && mouse_timer) {
        const float time_elapsed = timer_elapsed(mouse_timer) / 50;
        speed                    = mk_initial_speed + MOUSEKEY_MOVE_DELTA * time_elapsed + MOUSEKEY_MOVE_DELTA * 0.5 * time_elapsed * time_elapsed;

        speed = speed > mk_base_speed ? mk_base_speed : speed;
    }

    /* convert speed to USB mouse speed 1 to 127 */
    speed = (uint8_t)(speed / (1000.0f / mk_interval));
    speed = speed < 1 ? 1 : speed;

    return speed > MOUSEKEY_MOVE_MAX ? MOUSEKEY_MOVE_MAX : speed;
}

static uint8_t wheel_unit(void) {
    float speed = MOUSEKEY_WHEEL_INITIAL_MOVEMENTS;

    if (mousekey_accel & ((1 << 0) | (1 << 2))) {
        speed = mousekey_accel & (1 << 2) ? MOUSEKEY_WHEEL_ACCELERATED_MOVEMENTS : MOUSEKEY_WHEEL_DECELERATED_MOVEMENTS;
    } else if (mousekey_wheel_repeat && mouse_timer) {
        if (mk_wheel_interval != MOUSEKEY_WHEEL_BASE_MOVEMENTS) {
            const float time_elapsed = timer_elapsed(mouse_timer) / 50;
            speed                    = MOUSEKEY_WHEEL_INITIAL_MOVEMENTS + 1 * time_elapsed + 1 * 0.5 * time_elapsed * time_elapsed;
        }
        speed = speed > MOUSEKEY_WHEEL_BASE_MOVEMENTS ? MOUSEKEY_WHEEL_BASE_MOVEMENTS : speed;
    }
    mk_wheel_interval = 1000.0f / speed;

    return (uint8_t)speed > MOUSEKEY_WHEEL_INITIAL_MOVEMENTS ? 2 : 1;
}

#        endif /* #ifndef MK_KINETIC_SPEED */
#    else      /* #ifndef MK_COMBINED */

/* Combined mode */

static uint8_t move_unit(void) {
    uint16_t unit;
    if (mousekey_accel & (1 << 0)) {
        unit = 1;
    } else if (mousekey_accel & (1 << 1)) {
        unit = (MOUSEKEY_MOVE_DELTA * mk_max_speed) / 2;
    } else if (mousekey_accel & (1 << 2)) {
        unit = MOUSEKEY_MOVE_MAX;
    } else if (mousekey_repeat == 0) {
        unit = MOUSEKEY_MOVE_DELTA;
    } else if (mousekey_repeat >= mk_time_to_max) {
        unit = MOUSEKEY_MOVE_DELTA * mk_max_speed;
    } else {
        unit = (MOUSEKEY_MOVE_DELTA * mk_max_speed * mousekey_repeat) / mk_time_to_max;
    }
    return (unit > MOUSEKEY_MOVE_MAX ? MOUSEKEY_MOVE_MAX : (unit == 0 ? 1 : unit));
}

static uint8_t wheel_unit(void) {
    uint16_t unit;
    if (mousekey_accel & (1 << 0)) {
        unit = 1;
    } else if (mousekey_accel & (1 << 1)) {
        unit = (MOUSEKEY_WHEEL_DELTA * mk_wheel_max_speed) / 2;
    } else if (mousekey_accel & (1 << 2)) {
        unit = MOUSEKEY_WHEEL_MAX;
    } else if (mousekey_repeat == 0) {
        unit = MOUSEKEY_WHEEL_DELTA;
    } else if (mousekey_repeat >= mk_wheel_time_to_max) {
        unit = MOUSEKEY_WHEEL_DELTA * mk_wheel_max_speed;
    } else {
        unit = (MOUSEKEY_WHEEL_DELTA * mk_wheel_max_speed * mousekey_repeat) / mk_wheel_time_to_max;
    }
    return (unit > MOUSEKEY_WHEEL_MAX ? MOUSEKEY_WHEEL_MAX : (unit == 0 ? 1 : unit));
}

#    endif /* #ifndef MK_COMBINED */

#    ifdef MOUSEKEY_INERTIA

static int8_t calc_inertia(int8_t direction, int8_t velocity) {
    // simulate acceleration and deceleration

    // deceleration
    if ((direction > -1) && (velocity < 0))
        velocity = (velocity + 1) * (256 - MOUSEKEY_FRICTION) / 256;
    else if ((direction < 1) && (velocity > 0))
        velocity = velocity * (256 - MOUSEKEY_FRICTION) / 256;

    // acceleration
    if ((direction > 0) && (velocity < mk_time_to_max))
        velocity++;
    else if ((direction < 0) && (velocity > -mk_time_to_max))
        velocity--;

    return velocity;
}

#    endif

void mousekey_task(void) {
    // report cursor and scroll movement independently
    report_mouse_t tmpmr = mouse_report;

    mouse_report.x = 0;
    mouse_report.y = 0;
    mouse_report.v = 0;
    mouse_report.h = 0;

#    ifdef MOUSEKEY_INERTIA

    // if an animation is in progress and it's time for the next frame
    if ((mousekey_frame) && timer_elapsed(last_timer_c) > ((mousekey_frame > 1) ? mk_interval : mk_delay * 10)) {
        mousekey_x_inertia = calc_inertia(mousekey_x_dir, mousekey_x_inertia);
        mousekey_y_inertia = calc_inertia(mousekey_y_dir, mousekey_y_inertia);

        mouse_report.x = move_unit(0);
        mouse_report.y = move_unit(1);

        // prevent sticky "drift"
        if ((!mousekey_x_dir) && (!mousekey_x_inertia)) tmpmr.x = 0;
        if ((!mousekey_y_dir) && (!mousekey_y_inertia)) tmpmr.y = 0;

        if (mousekey_frame < 2) mousekey_frame++;
    }

    // reset if not moving and no movement keys are held
    if ((!mousekey_x_dir) && (!mousekey_y_dir) && (!mousekey_x_inertia) && (!mousekey_y_inertia)) {
        mousekey_frame = 0;
        tmpmr.x        = 0;
        tmpmr.y        = 0;
    }

#    else // default acceleration

    if ((tmpmr.x || tmpmr.y) && timer_elapsed(last_timer_c) > (mousekey_repeat ? mk_interval : mk_delay * 10)) {
        if (mousekey_repeat != UINT8_MAX) mousekey_repeat++;
        if (tmpmr.x != 0) mouse_report.x = move_unit() * ((tmpmr.x > 0) ? 1 : -1);
        if (tmpmr.y != 0) mouse_report.y = move_unit() * ((tmpmr.y > 0) ? 1 : -1);

        /* diagonal move [1/sqrt(2)] */
        if (mouse_report.x && mouse_report.y) {
            mouse_report.x = times_inv_sqrt2(mouse_report.x);
            if (mouse_report.x == 0) {
                mouse_report.x = 1;
            }
            mouse_report.y = times_inv_sqrt2(mouse_report.y);
            if (mouse_report.y == 0) {
                mouse_report.y = 1;
            }
        }
    }

#    endif // MOUSEKEY_INERTIA or not

    if ((tmpmr.v || tmpmr.h) && timer_elapsed(last_timer_w) > (mousekey_wheel_repeat ? mk_wheel_interval : mk_wheel_delay * 10)) {
        if (mousekey_wheel_repeat != UINT8_MAX) mousekey_wheel_repeat++;
        if (tmpmr.v != 0) mouse_report.v = wheel_unit() * ((tmpmr.v > 0) ? 1 : -1);
        if (tmpmr.h != 0) mouse_report.h = wheel_unit() * ((tmpmr.h > 0) ? 1 : -1);

        /* diagonal move [1/sqrt(2)] */
        if (mouse_report.v && mouse_report.h) {
            mouse_report.v = times_inv_sqrt2(mouse_report.v);
            if (mouse_report.v == 0) {
                mouse_report.v = 1;
            }
            mouse_report.h = times_inv_sqrt2(mouse_report.h);
            if (mouse_report.h == 0) {
                mouse_report.h = 1;
            }
        }
    }

    if (has_mouse_report_changed(&mouse_report, &tmpmr) || should_mousekey_report_send(&mouse_report)) {
        mousekey_send();
    }
    // save the state for later
    memcpy(&mouse_report, &tmpmr, sizeof(tmpmr));
}

void mousekey_on(uint8_t code) {
#    ifdef MK_KINETIC_SPEED
    if (mouse_timer == 0) {
        mouse_timer = timer_read();
    }
#    endif /* #ifdef MK_KINETIC_SPEED */

#    ifdef MOUSEKEY_INERTIA

    // initial keypress sets impulse and activates first frame of movement
    if ((code == KC_MS_UP) || (code == KC_MS_DOWN)) {
        mousekey_y_dir = (code == KC_MS_DOWN) ? 1 : -1;
        if (mousekey_frame < 2) mouse_report.y = move_unit(1);
    } else if ((code == KC_MS_LEFT) || (code == KC_MS_RIGHT)) {
        mousekey_x_dir = (code == KC_MS_RIGHT) ? 1 : -1;
        if (mousekey_frame < 2) mouse_report.x = move_unit(0);
    }

#    else // no inertia

    if (code == KC_MS_UP)
        mouse_report.y = move_unit() * -1;
    else if (code == KC_MS_DOWN)
        mouse_report.y = move_unit();
    else if (code == KC_MS_LEFT)
        mouse_report.x = move_unit() * -1;
    else if (code == KC_MS_RIGHT)
        mouse_report.x = move_unit();

#    endif // inertia or not

    else if (code == KC_MS_WH_UP)
        mouse_report.v = wheel_unit();
    else if (code == KC_MS_WH_DOWN)
        mouse_report.v = wheel_unit() * -1;
    else if (code == KC_MS_WH_LEFT)
        mouse_report.h = wheel_unit() * -1;
    else if (code == KC_MS_WH_RIGHT)
        mouse_report.h = wheel_unit();
    else if (IS_MOUSEKEY_BUTTON(code))
        mouse_report.buttons |= 1 << (code - KC_MS_BTN1);
    else if (code == KC_MS_ACCEL0)
        mousekey_accel |= (1 << 0);
    else if (code == KC_MS_ACCEL1)
        mousekey_accel |= (1 << 1);
    else if (code == KC_MS_ACCEL2)
        mousekey_accel |= (1 << 2);
}

void mousekey_off(uint8_t code) {
#    ifdef MOUSEKEY_INERTIA

    // key release clears impulse unless opposite direction is held
    if ((code == KC_MS_UP) && (mousekey_y_dir < 1))
        mousekey_y_dir = 0;
    else if ((code == KC_MS_DOWN) && (mousekey_y_dir > -1))
        mousekey_y_dir = 0;
    else if ((code == KC_MS_LEFT) && (mousekey_x_dir < 1))
        mousekey_x_dir = 0;
    else if ((code == KC_MS_RIGHT) && (mousekey_x_dir > -1))
        mousekey_x_dir = 0;

#    else // no inertia

    if (code == KC_MS_UP && mouse_report.y < 0)
        mouse_report.y = 0;
    else if (code == KC_MS_DOWN && mouse_report.y > 0)
        mouse_report.y = 0;
    else if (code == KC_MS_LEFT && mouse_report.x < 0)
        mouse_report.x = 0;
    else if (code == KC_MS_RIGHT && mouse_report.x > 0)
        mouse_report.x = 0;

#    endif // inertia or not

    else if (code == KC_MS_WH_UP && mouse_report.v > 0)
        mouse_report.v = 0;
    else if (code == KC_MS_WH_DOWN && mouse_report.v < 0)
        mouse_report.v = 0;
    else if (code == KC_MS_WH_LEFT && mouse_report.h < 0)
        mouse_report.h = 0;
    else if (code == KC_MS_WH_RIGHT && mouse_report.h > 0)
        mouse_report.h = 0;
    else if (IS_MOUSEKEY_BUTTON(code))
        mouse_report.buttons &= ~(1 << (code - KC_MS_BTN1));
    else if (code == KC_MS_ACCEL0)
        mousekey_accel &= ~(1 << 0);
    else if (code == KC_MS_ACCEL1)
        mousekey_accel &= ~(1 << 1);
    else if (code == KC_MS_ACCEL2)
        mousekey_accel &= ~(1 << 2);
    if (mouse_report.x == 0 && mouse_report.y == 0) {
        mousekey_repeat = 0;
#    ifdef MK_KINETIC_SPEED
        mouse_timer = 0;
#    endif /* #ifdef MK_KINETIC_SPEED */
    }
    if (mouse_report.v == 0 && mouse_report.h == 0) mousekey_wheel_repeat = 0;
}

#else /* #ifndef MK_3_SPEED */

enum { mkspd_unmod, mkspd_0, mkspd_1, mkspd_2, mkspd_COUNT };
#    ifndef MK_MOMENTARY_ACCEL
static uint8_t  mk_speed                 = mkspd_1;
#    else
static uint8_t mk_speed      = mkspd_unmod;
static uint8_t mkspd_DEFAULT = mkspd_unmod;
#    endif
static uint16_t last_timer_c             = 0;
static uint16_t last_timer_w             = 0;
uint16_t        c_offsets[mkspd_COUNT]   = {MK_C_OFFSET_UNMOD, MK_C_OFFSET_0, MK_C_OFFSET_1, MK_C_OFFSET_2};
uint16_t        c_intervals[mkspd_COUNT] = {MK_C_INTERVAL_UNMOD, MK_C_INTERVAL_0, MK_C_INTERVAL_1, MK_C_INTERVAL_2};
uint16_t        w_offsets[mkspd_COUNT]   = {MK_W_OFFSET_UNMOD, MK_W_OFFSET_0, MK_W_OFFSET_1, MK_W_OFFSET_2};
uint16_t        w_intervals[mkspd_COUNT] = {MK_W_INTERVAL_UNMOD, MK_W_INTERVAL_0, MK_W_INTERVAL_1, MK_W_INTERVAL_2};

void mousekey_task(void) {
    // report cursor and scroll movement independently
    report_mouse_t tmpmr = mouse_report;
    mouse_report.x       = 0;
    mouse_report.y       = 0;
    mouse_report.v       = 0;
    mouse_report.h       = 0;

    if ((tmpmr.x || tmpmr.y) && timer_elapsed(last_timer_c) > c_intervals[mk_speed]) {
        mouse_report.x = tmpmr.x;
        mouse_report.y = tmpmr.y;
    }
    if ((tmpmr.h || tmpmr.v) && timer_elapsed(last_timer_w) > w_intervals[mk_speed]) {
        mouse_report.v = tmpmr.v;
        mouse_report.h = tmpmr.h;
    }

    if (has_mouse_report_changed(&mouse_report, &tmpmr) || should_mousekey_report_send(&mouse_report)) {
        mousekey_send();
    }
    memcpy(&mouse_report, &tmpmr, sizeof(tmpmr));
}

void adjust_speed(void) {
    uint16_t const c_offset = c_offsets[mk_speed];
    uint16_t const w_offset = w_offsets[mk_speed];
    if (mouse_report.x > 0) mouse_report.x = c_offset;
    if (mouse_report.x < 0) mouse_report.x = c_offset * -1;
    if (mouse_report.y > 0) mouse_report.y = c_offset;
    if (mouse_report.y < 0) mouse_report.y = c_offset * -1;
    if (mouse_report.h > 0) mouse_report.h = w_offset;
    if (mouse_report.h < 0) mouse_report.h = w_offset * -1;
    if (mouse_report.v > 0) mouse_report.v = w_offset;
    if (mouse_report.v < 0) mouse_report.v = w_offset * -1;
    // adjust for diagonals
    if (mouse_report.x && mouse_report.y) {
        mouse_report.x = times_inv_sqrt2(mouse_report.x);
        if (mouse_report.x == 0) {
            mouse_report.x = 1;
        }
        mouse_report.y = times_inv_sqrt2(mouse_report.y);
        if (mouse_report.y == 0) {
            mouse_report.y = 1;
        }
    }
    if (mouse_report.h && mouse_report.v) {
        mouse_report.h = times_inv_sqrt2(mouse_report.h);
        mouse_report.v = times_inv_sqrt2(mouse_report.v);
    }
}

void mousekey_on(uint8_t code) {
    uint16_t const c_offset  = c_offsets[mk_speed];
    uint16_t const w_offset  = w_offsets[mk_speed];
    uint8_t const  old_speed = mk_speed;
    if (code == KC_MS_UP)
        mouse_report.y = c_offset * -1;
    else if (code == KC_MS_DOWN)
        mouse_report.y = c_offset;
    else if (code == KC_MS_LEFT)
        mouse_report.x = c_offset * -1;
    else if (code == KC_MS_RIGHT)
        mouse_report.x = c_offset;
    else if (code == KC_MS_WH_UP)
        mouse_report.v = w_offset;
    else if (code == KC_MS_WH_DOWN)
        mouse_report.v = w_offset * -1;
    else if (code == KC_MS_WH_LEFT)
        mouse_report.h = w_offset * -1;
    else if (code == KC_MS_WH_RIGHT)
        mouse_report.h = w_offset;
    else if (IS_MOUSEKEY_BUTTON(code))
        mouse_report.buttons |= 1 << (code - KC_MS_BTN1);
    else if (code == KC_MS_ACCEL0)
        mk_speed = mkspd_0;
    else if (code == KC_MS_ACCEL1)
        mk_speed = mkspd_1;
    else if (code == KC_MS_ACCEL2)
        mk_speed = mkspd_2;
    if (mk_speed != old_speed) adjust_speed();
}

void mousekey_off(uint8_t code) {
#    ifdef MK_MOMENTARY_ACCEL
    uint8_t const old_speed = mk_speed;
#    endif
    if (code == KC_MS_UP && mouse_report.y < 0)
        mouse_report.y = 0;
    else if (code == KC_MS_DOWN && mouse_report.y > 0)
        mouse_report.y = 0;
    else if (code == KC_MS_LEFT && mouse_report.x < 0)
        mouse_report.x = 0;
    else if (code == KC_MS_RIGHT && mouse_report.x > 0)
        mouse_report.x = 0;
    else if (code == KC_MS_WH_UP && mouse_report.v > 0)
        mouse_report.v = 0;
    else if (code == KC_MS_WH_DOWN && mouse_report.v < 0)
        mouse_report.v = 0;
    else if (code == KC_MS_WH_LEFT && mouse_report.h < 0)
        mouse_report.h = 0;
    else if (code == KC_MS_WH_RIGHT && mouse_report.h > 0)
        mouse_report.h = 0;
    else if (IS_MOUSEKEY_BUTTON(code))
        mouse_report.buttons &= ~(1 << (code - KC_MS_BTN1));
#    ifdef MK_MOMENTARY_ACCEL
    else if (code == KC_MS_ACCEL0)
        mk_speed = mkspd_DEFAULT;
    else if (code == KC_MS_ACCEL1)
        mk_speed = mkspd_DEFAULT;
    else if (code == KC_MS_ACCEL2)
        mk_speed = mkspd_DEFAULT;
    if (mk_speed != old_speed) adjust_speed();
#    endif
}

#endif /* #ifndef MK_3_SPEED */

void mousekey_send(void) {
    mousekey_debug();
    uint16_t time = timer_read();
    if (mouse_report.x || mouse_report.y) last_timer_c = time;
    if (mouse_report.v || mouse_report.h) last_timer_w = time;
    host_mouse_send(&mouse_report);
}

void mousekey_clear(void) {
    mouse_report          = (report_mouse_t){};
    mousekey_repeat       = 0;
    mousekey_wheel_repeat = 0;
    mousekey_accel        = 0;
#ifdef MOUSEKEY_INERTIA
    mousekey_frame     = 0;
    mousekey_x_inertia = 0;
    mousekey_y_inertia = 0;
    mousekey_x_dir     = 0;
    mousekey_y_dir     = 0;
#endif
}

static void mousekey_debug(void) {
    if (!debug_mouse) return;
    print("mousekey [btn|x y v h](rep/acl): [");
    print_hex8(mouse_report.buttons);
    print("|");
    print_decs(mouse_report.x);
    print(" ");
    print_decs(mouse_report.y);
    print(" ");
    print_decs(mouse_report.v);
    print(" ");
    print_decs(mouse_report.h);
    print("](");
    print_dec(mousekey_repeat);
    print("/");
    print_dec(mousekey_accel);
    print(")\n");
}

report_mouse_t mousekey_get_report(void) {
    return mouse_report;
}

bool should_mousekey_report_send(report_mouse_t *mouse_report) {
    return mouse_report->x || mouse_report->y || mouse_report->v || mouse_report->h;
}