summaryrefslogtreecommitdiff
path: root/src/evdev.h
blob: 4fe2cb91fe5380337de97382dd512cee0c24885b (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
/*
 * Copyright © 2011, 2012 Intel Corporation
 * Copyright © 2013 Jonas Ådahl
 * Copyright © 2013-2015 Red Hat, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#ifndef EVDEV_H
#define EVDEV_H

#include "config.h"

#include <stdbool.h>
#include "linux/input.h"
#include <libevdev/libevdev.h>

#include "libinput-private.h"
#include "timer.h"
#include "filter.h"

/*
 * The constant (linear) acceleration factor we use to normalize trackpoint
 * deltas before calculating pointer acceleration.
 */
#define DEFAULT_TRACKPOINT_ACCEL 1.0

/* The fake resolution value for abs devices without resolution */
#define EVDEV_FAKE_RESOLUTION 1

enum evdev_event_type {
	EVDEV_NONE,
	EVDEV_ABSOLUTE_TOUCH_DOWN,
	EVDEV_ABSOLUTE_MOTION,
	EVDEV_ABSOLUTE_TOUCH_UP,
	EVDEV_ABSOLUTE_MT_DOWN,
	EVDEV_ABSOLUTE_MT_MOTION,
	EVDEV_ABSOLUTE_MT_UP,
	EVDEV_RELATIVE_MOTION,
};

enum evdev_device_seat_capability {
	EVDEV_DEVICE_POINTER = (1 << 0),
	EVDEV_DEVICE_KEYBOARD = (1 << 1),
	EVDEV_DEVICE_TOUCH = (1 << 2),
	EVDEV_DEVICE_TABLET = (1 << 3),
	EVDEV_DEVICE_TABLET_PAD = (1 << 4),
	EVDEV_DEVICE_GESTURE = (1 << 5),
};

enum evdev_device_tags {
	EVDEV_TAG_EXTERNAL_MOUSE = (1 << 0),
	EVDEV_TAG_INTERNAL_TOUCHPAD = (1 << 1),
	EVDEV_TAG_TRACKPOINT = (1 << 2),
	EVDEV_TAG_KEYBOARD = (1 << 3),
};

enum evdev_middlebutton_state {
	MIDDLEBUTTON_IDLE,
	MIDDLEBUTTON_LEFT_DOWN,
	MIDDLEBUTTON_RIGHT_DOWN,
	MIDDLEBUTTON_MIDDLE,
	MIDDLEBUTTON_LEFT_UP_PENDING,
	MIDDLEBUTTON_RIGHT_UP_PENDING,
	MIDDLEBUTTON_IGNORE_LR,
	MIDDLEBUTTON_IGNORE_L,
	MIDDLEBUTTON_IGNORE_R,
	MIDDLEBUTTON_PASSTHROUGH,
};

enum evdev_middlebutton_event {
	MIDDLEBUTTON_EVENT_L_DOWN,
	MIDDLEBUTTON_EVENT_R_DOWN,
	MIDDLEBUTTON_EVENT_OTHER,
	MIDDLEBUTTON_EVENT_L_UP,
	MIDDLEBUTTON_EVENT_R_UP,
	MIDDLEBUTTON_EVENT_TIMEOUT,
	MIDDLEBUTTON_EVENT_ALL_UP,
};

enum evdev_device_model {
	EVDEV_MODEL_DEFAULT = 0,
	EVDEV_MODEL_LENOVO_X230 = (1 << 0),
	EVDEV_MODEL_CHROMEBOOK = (1 << 1),
	EVDEV_MODEL_SYSTEM76_BONOBO = (1 << 2),
	EVDEV_MODEL_SYSTEM76_GALAGO = (1 << 3),
	EVDEV_MODEL_SYSTEM76_KUDU = (1 << 4),
	EVDEV_MODEL_CLEVO_W740SU = (1 << 5),
	EVDEV_MODEL_APPLE_TOUCHPAD = (1 << 6),
	EVDEV_MODEL_WACOM_TOUCHPAD = (1 << 7),
	EVDEV_MODEL_ALPS_TOUCHPAD = (1 << 8),
	EVDEV_MODEL_SYNAPTICS_SERIAL_TOUCHPAD = (1 << 9),
	EVDEV_MODEL_JUMPING_SEMI_MT = (1 << 10),
	EVDEV_MODEL_ELANTECH_TOUCHPAD = (1 << 11),
	EVDEV_MODEL_LENOVO_X220_TOUCHPAD_FW81 = (1 << 12),
	EVDEV_MODEL_APPLE_INTERNAL_KEYBOARD = (1 << 13),
	EVDEV_MODEL_CYBORG_RAT = (1 << 14),
	EVDEV_MODEL_CYAPA = (1 << 15),
	EVDEV_MODEL_LENOVO_T450_TOUCHPAD= (1 << 17),
	EVDEV_MODEL_WOBBLY_TOUCHPAD = (1 << 18),
	EVDEV_MODEL_TRACKBALL = (1 << 19),
};

struct mt_slot {
	int32_t seat_slot;
	struct device_coords point;
	struct device_coords hysteresis_center;
};

struct evdev_device {
	struct libinput_device base;

	struct libinput_source *source;

	struct evdev_dispatch *dispatch;
	struct libevdev *evdev;
	struct udev_device *udev_device;
	char *output_name;
	const char *devname;
	bool was_removed;
	int fd;
	struct {
		const struct input_absinfo *absinfo_x, *absinfo_y;
		int fake_resolution;

		struct device_coords point;
		int32_t seat_slot;

		int apply_calibration;
		struct matrix calibration;
		struct matrix default_calibration; /* from LIBINPUT_CALIBRATION_MATRIX */
		struct matrix usermatrix; /* as supplied by the caller */

		struct device_coords dimensions;
	} abs;

	struct {
		int slot;
		struct mt_slot *slots;
		size_t slots_len;
		bool want_hysteresis;
		struct device_coords hysteresis_margin;
	} mt;
	struct mtdev *mtdev;

	struct device_coords rel;

	struct {
		struct libinput_timer timer;
		struct libinput_device_config_scroll_method config;
		/* Currently enabled method, button */
		enum libinput_config_scroll_method method;
		uint32_t button;
		uint64_t button_down_time;

		/* set during device init, used at runtime to delay changes
		 * until all buttons are up */
		enum libinput_config_scroll_method want_method;
		uint32_t want_button;
		/* Checks if buttons are down and commits the setting */
		void (*change_scroll_method)(struct evdev_device *device);
		bool button_scroll_active;
		bool button_scroll_btn_pressed;
		double threshold;
		double direction_lock_threshold;
		uint32_t direction;
		struct normalized_coords buildup;

		struct libinput_device_config_natural_scroll config_natural;
		/* set during device init if we want natural scrolling,
		 * used at runtime to enable/disable the feature */
		bool natural_scrolling_enabled;

		/* angle per REL_WHEEL click in degrees */
		int wheel_click_angle;
	} scroll;

	enum evdev_event_type pending_event;
	enum evdev_device_seat_capability seat_caps;
	enum evdev_device_tags tags;

	int is_mt;
	int suspended;

	struct {
		struct libinput_device_config_accel config;
		struct motion_filter *filter;
	} pointer;

	/* Bitmask of pressed keys used to ignore initial release events from
	 * the kernel. */
	unsigned long hw_key_mask[NLONGS(KEY_CNT)];
	/* Key counter used for multiplexing button events internally in
	 * libinput. */
	uint8_t key_count[KEY_CNT];

	struct {
		struct libinput_device_config_left_handed config;
		/* left-handed currently enabled */
		bool enabled;
		/* set during device init if we want left_handed config,
		 * used at runtime to delay the effect until buttons are up */
		bool want_enabled;
		/* Checks if buttons are down and commits the setting */
		void (*change_to_enabled)(struct evdev_device *device);
	} left_handed;

	struct {
		struct libinput_device_config_middle_emulation config;
		/* middle-button emulation enabled */
		bool enabled;
		bool enabled_default;
		bool want_enabled;
		enum evdev_middlebutton_state state;
		struct libinput_timer timer;
		uint32_t button_mask;
		uint64_t first_event_time;
	} middlebutton;

	int dpi; /* HW resolution */
	struct ratelimit syn_drop_limit; /* ratelimit for SYN_DROPPED logging */
	struct ratelimit nonpointer_rel_limit; /* ratelimit for REL_* events from non-pointer devices */

	uint32_t model_flags;
};

#define EVDEV_UNHANDLED_DEVICE ((struct evdev_device *) 1)

struct evdev_dispatch;

struct evdev_dispatch_interface {
	/* Process an evdev input event. */
	void (*process)(struct evdev_dispatch *dispatch,
			struct evdev_device *device,
			struct input_event *event,
			uint64_t time);

	/* Device is being suspended */
	void (*suspend)(struct evdev_dispatch *dispatch,
			struct evdev_device *device);

	/* Device is being removed (may be NULL) */
	void (*remove)(struct evdev_dispatch *dispatch);

	/* Destroy an event dispatch handler and free all its resources. */
	void (*destroy)(struct evdev_dispatch *dispatch);

	/* A new device was added */
	void (*device_added)(struct evdev_device *device,
			     struct evdev_device *added_device);

	/* A device was removed */
	void (*device_removed)(struct evdev_device *device,
			       struct evdev_device *removed_device);

	/* A device was suspended */
	void (*device_suspended)(struct evdev_device *device,
				 struct evdev_device *suspended_device);

	/* A device was resumed */
	void (*device_resumed)(struct evdev_device *device,
			       struct evdev_device *resumed_device);

	/* Called immediately after the LIBINPUT_EVENT_DEVICE_ADDED event
	 * was sent */
	void (*post_added)(struct evdev_device *device,
			   struct evdev_dispatch *dispatch);
};

struct evdev_dispatch {
	struct evdev_dispatch_interface *interface;
	struct libinput_device_config_calibration calibration;

	struct {
		bool is_enabled;
		int angle;
		struct matrix matrix;
		struct libinput_device_config_rotation config;
	} rotation;

	struct {
		struct libinput_device_config_send_events config;
		enum libinput_config_send_events_mode current_mode;
	} sendevents;
};

struct evdev_device *
evdev_device_create(struct libinput_seat *seat,
		    struct udev_device *device);

void
evdev_transform_absolute(struct evdev_device *device,
			 struct device_coords *point);

void
evdev_transform_relative(struct evdev_device *device,
			 struct device_coords *point);

void
evdev_init_calibration(struct evdev_device *device,
		       struct evdev_dispatch *dispatch);

int
evdev_device_init_pointer_acceleration(struct evdev_device *device,
				       struct motion_filter *filter);

struct evdev_dispatch *
evdev_touchpad_create(struct evdev_device *device);

struct evdev_dispatch *
evdev_mt_touchpad_create(struct evdev_device *device);

struct evdev_dispatch *
evdev_tablet_create(struct evdev_device *device);

struct evdev_dispatch *
evdev_tablet_pad_create(struct evdev_device *device);

void
evdev_tag_touchpad(struct evdev_device *device,
		   struct udev_device *udev_device);

void
evdev_device_led_update(struct evdev_device *device, enum libinput_led leds);

int
evdev_device_get_keys(struct evdev_device *device, char *keys, size_t size);

const char *
evdev_device_get_output(struct evdev_device *device);

const char *
evdev_device_get_sysname(struct evdev_device *device);

const char *
evdev_device_get_name(struct evdev_device *device);

unsigned int
evdev_device_get_id_product(struct evdev_device *device);

unsigned int
evdev_device_get_id_vendor(struct evdev_device *device);

struct udev_device *
evdev_device_get_udev_device(struct evdev_device *device);

void
evdev_device_set_default_calibration(struct evdev_device *device,
				     const float calibration[6]);
void
evdev_device_calibrate(struct evdev_device *device,
		       const float calibration[6]);

int
evdev_device_has_capability(struct evdev_device *device,
			    enum libinput_device_capability capability);

int
evdev_device_get_size(struct evdev_device *device,
		      double *w,
		      double *h);

int
evdev_device_has_button(struct evdev_device *device, uint32_t code);

int
evdev_device_has_key(struct evdev_device *device, uint32_t code);

int
evdev_device_tablet_pad_get_num_buttons(struct evdev_device *device);

int
evdev_device_tablet_pad_get_num_rings(struct evdev_device *device);

int
evdev_device_tablet_pad_get_num_strips(struct evdev_device *device);

double
evdev_device_transform_x(struct evdev_device *device,
			 double x,
			 uint32_t width);

double
evdev_device_transform_y(struct evdev_device *device,
			 double y,
			 uint32_t height);
int
evdev_device_suspend(struct evdev_device *device);

int
evdev_device_resume(struct evdev_device *device);

void
evdev_notify_suspended_device(struct evdev_device *device);

void
evdev_notify_resumed_device(struct evdev_device *device);

void
evdev_keyboard_notify_key(struct evdev_device *device,
			  uint64_t time,
			  int key,
			  enum libinput_key_state state);

void
evdev_pointer_notify_button(struct evdev_device *device,
			    uint64_t time,
			    unsigned int button,
			    enum libinput_button_state state);
void
evdev_pointer_notify_physical_button(struct evdev_device *device,
				     uint64_t time,
				     int button,
				     enum libinput_button_state state);

void
evdev_init_natural_scroll(struct evdev_device *device);

void
evdev_notify_axis(struct evdev_device *device,
		  uint64_t time,
		  uint32_t axes,
		  enum libinput_pointer_axis_source source,
		  const struct normalized_coords *delta_in,
		  const struct discrete_coords *discrete_in);
void
evdev_post_scroll(struct evdev_device *device,
		  uint64_t time,
		  enum libinput_pointer_axis_source source,
		  const struct normalized_coords *delta);

void
evdev_stop_scroll(struct evdev_device *device,
		  uint64_t time,
		  enum libinput_pointer_axis_source source);

void
evdev_device_remove(struct evdev_device *device);

void
evdev_device_destroy(struct evdev_device *device);

bool
evdev_middlebutton_filter_button(struct evdev_device *device,
				 uint64_t time,
				 int button,
				 enum libinput_button_state state);

void
evdev_init_middlebutton(struct evdev_device *device,
			bool enabled,
			bool want_config);

static inline double
evdev_convert_to_mm(const struct input_absinfo *absinfo, double v)
{
	double value = v - absinfo->minimum;
	return value/absinfo->resolution;
}

int
evdev_init_left_handed(struct evdev_device *device,
		       void (*change_to_left_handed)(struct evdev_device *));

bool
evdev_tablet_has_left_handed(struct evdev_device *device);

static inline uint32_t
evdev_to_left_handed(struct evdev_device *device,
		     uint32_t button)
{
	if (device->left_handed.enabled) {
		if (button == BTN_LEFT)
			return BTN_RIGHT;
		else if (button == BTN_RIGHT)
			return BTN_LEFT;
	}
	return button;
}

static inline int
evdev_hysteresis(int in, int center, int margin)
{
	int diff = in - center;
	if (abs(diff) <= margin)
		return center;

	if (diff > margin)
		return center + diff - margin;
	else
		return center + diff + margin;
}

#endif /* EVDEV_H */