src/evdev.h

   1 /*
   2  * Copyright © 2011, 2012 Intel Corporation
   3  * Copyright © 2013 Jonas Ådahl
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and
   6  * its documentation for any purpose is hereby granted without fee, provided
   7  * that the above copyright notice appear in all copies and that both that
   8  * copyright notice and this permission notice appear in supporting
   9  * documentation, and that the name of the copyright holders not be used in
  10  * advertising or publicity pertaining to distribution of the software
  11  * without specific, written prior permission.  The copyright holders make
  12  * no representations about the suitability of this software for any
  13  * purpose.  It is provided "as is" without express or implied warranty.
  14  *
  15  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  16  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  17  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  18  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  19  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  20  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  21  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22  */
  23
  24 #ifndef EVDEV_H
  25 #define EVDEV_H
  26
  27 #include "config.h"
  28
  29 #include <stdbool.h>
  30 #include "linux/input.h"
  31 #include <libevdev/libevdev.h>
  32
  33 #include "libinput-private.h"
  34 #include "timer.h"
  35
  36 enum evdev_event_type {
  37         EVDEV_NONE,
  38         EVDEV_ABSOLUTE_TOUCH_DOWN,
  39         EVDEV_ABSOLUTE_MOTION,
  40         EVDEV_ABSOLUTE_TOUCH_UP,
  41         EVDEV_ABSOLUTE_MT_DOWN,
  42         EVDEV_ABSOLUTE_MT_MOTION,
  43         EVDEV_ABSOLUTE_MT_UP,
  44         EVDEV_RELATIVE_MOTION,
  45 };
  46
  47 enum evdev_device_seat_capability {
  48         EVDEV_DEVICE_POINTER = (1 << 0),
  49         EVDEV_DEVICE_KEYBOARD = (1 << 1),
  50         EVDEV_DEVICE_TOUCH = (1 << 2)
  51 };
  52
  53 enum evdev_device_tags {
  54         EVDEV_TAG_EXTERNAL_MOUSE = (1 << 0),
  55         EVDEV_TAG_INTERNAL_TOUCHPAD = (1 << 1),
  56         EVDEV_TAG_TRACKPOINT = (1 << 2),
  57 };
  58
  59 struct mt_slot {
  60         int32_t seat_slot;
  61         int32_t x, y;
  62 };
  63
  64 struct evdev_device {
  65         struct libinput_device base;
  66
  67         struct libinput_source *source;
  68
  69         struct evdev_dispatch *dispatch;
  70         struct libevdev *evdev;
  71         char *output_name;
  72         char *devnode;
  73         char *sysname;
  74         char *syspath;
  75         const char *devname;
  76         int fd;
  77         struct {
  78                 const struct input_absinfo *absinfo_x, *absinfo_y;
  79                 int fake_resolution;
  80
  81                 int32_t x, y;
  82                 int32_t seat_slot;
  83
  84                 int apply_calibration;
  85                 struct matrix calibration;
  86                 struct matrix default_calibration; /* from LIBINPUT_CALIBRATION_MATRIX */
  87                 struct matrix usermatrix; /* as supplied by the caller */
  88         } abs;
  89
  90         struct {
  91                 int slot;
  92                 struct mt_slot *slots;
  93                 size_t slots_len;
  94         } mt;
  95         struct mtdev *mtdev;
  96
  97         struct {
  98                 int dx, dy;
  99         } rel;
 100
 101         struct {
 102                 struct libinput_timer timer;
 103                 bool has_middle_button_scroll;
 104                 bool middle_button_scroll_active;
 105                 double threshold;
 106                 uint32_t direction;
 107         } scroll;
 108
 109         enum evdev_event_type pending_event;
 110         enum evdev_device_seat_capability seat_caps;
 111         enum evdev_device_tags tags;
 112
 113         int is_mt;
 114         int suspended;
 115
 116         struct {
 117                 struct motion_filter *filter;
 118         } pointer;
 119
 120         /* Bitmask of pressed keys used to ignore initial release events from
 121          * the kernel. */
 122         unsigned long hw_key_mask[NLONGS(KEY_CNT)];
 123         /* Key counter used for multiplexing button events internally in
 124          * libinput. */
 125         uint8_t key_count[KEY_CNT];
 126 };
 127
 128 #define EVDEV_UNHANDLED_DEVICE ((struct evdev_device *) 1)
 129
 130 struct evdev_dispatch;
 131
 132 struct evdev_dispatch_interface {
 133         /* Process an evdev input event. */
 134         void (*process)(struct evdev_dispatch *dispatch,
 135                         struct evdev_device *device,
 136                         struct input_event *event,
 137                         uint64_t time);
 138
 139         /* Destroy an event dispatch handler and free all its resources. */
 140         void (*destroy)(struct evdev_dispatch *dispatch);
 141
 142         /* A new device was added */
 143         void (*device_added)(struct evdev_device *device,
 144                              struct evdev_device *added_device);
 145
 146         /* A device was removed */
 147         void (*device_removed)(struct evdev_device *device,
 148                                struct evdev_device *removed_device);
 149
 150         /* A device was suspended */
 151         void (*device_suspended)(struct evdev_device *device,
 152                                  struct evdev_device *suspended_device);
 153
 154         /* A device was resumed */
 155         void (*device_resumed)(struct evdev_device *device,
 156                                struct evdev_device *resumed_device);
 157
 158         /* Tag device with one of EVDEV_TAG */
 159         void (*tag_device)(struct evdev_device *device,
 160                            struct udev_device *udev_device);
 161 };
 162
 163 struct evdev_dispatch {
 164         struct evdev_dispatch_interface *interface;
 165         struct libinput_device_config_calibration calibration;
 166
 167         struct {
 168                 struct libinput_device_config_send_events config;
 169                 enum libinput_config_send_events_mode current_mode;
 170         } sendevents;
 171 };
 172
 173 struct evdev_device *
 174 evdev_device_create(struct libinput_seat *seat,
 175                     const char *devnode,
 176                     const char *sysname,
 177                     const char *syspath);
 178
 179 struct evdev_dispatch *
 180 evdev_touchpad_create(struct evdev_device *device);
 181
 182 struct evdev_dispatch *
 183 evdev_mt_touchpad_create(struct evdev_device *device);
 184
 185 void
 186 evdev_device_led_update(struct evdev_device *device, enum libinput_led leds);
 187
 188 int
 189 evdev_device_get_keys(struct evdev_device *device, char *keys, size_t size);
 190
 191 const char *
 192 evdev_device_get_output(struct evdev_device *device);
 193
 194 const char *
 195 evdev_device_get_sysname(struct evdev_device *device);
 196
 197 const char *
 198 evdev_device_get_name(struct evdev_device *device);
 199
 200 unsigned int
 201 evdev_device_get_id_product(struct evdev_device *device);
 202
 203 unsigned int
 204 evdev_device_get_id_vendor(struct evdev_device *device);
 205
 206 void
 207 evdev_device_set_default_calibration(struct evdev_device *device,
 208                                      const float calibration[6]);
 209 void
 210 evdev_device_calibrate(struct evdev_device *device,
 211                        const float calibration[6]);
 212
 213 int
 214 evdev_device_has_capability(struct evdev_device *device,
 215                             enum libinput_device_capability capability);
 216
 217 int
 218 evdev_device_get_size(struct evdev_device *device,
 219                       double *w,
 220                       double *h);
 221
 222 double
 223 evdev_device_transform_x(struct evdev_device *device,
 224                          double x,
 225                          uint32_t width);
 226
 227 double
 228 evdev_device_transform_y(struct evdev_device *device,
 229                          double y,
 230                          uint32_t height);
 231 int
 232 evdev_device_suspend(struct evdev_device *device);
 233
 234 int
 235 evdev_device_resume(struct evdev_device *device);
 236
 237 void
 238 evdev_notify_suspended_device(struct evdev_device *device);
 239
 240 void
 241 evdev_notify_resumed_device(struct evdev_device *device);
 242
 243 void
 244 evdev_keyboard_notify_key(struct evdev_device *device,
 245                           uint32_t time,
 246                           int key,
 247                           enum libinput_key_state state);
 248
 249 void
 250 evdev_pointer_notify_button(struct evdev_device *device,
 251                             uint32_t time,
 252                             int button,
 253                             enum libinput_button_state state);
 254
 255 void
 256 evdev_post_scroll(struct evdev_device *device,
 257                   uint64_t time,
 258                   double dx,
 259                   double dy);
 260
 261
 262 void
 263 evdev_stop_scroll(struct evdev_device *device, uint64_t time);
 264
 265 void
 266 evdev_device_remove(struct evdev_device *device);
 267
 268 void
 269 evdev_device_destroy(struct evdev_device *device);
 270
 271 static inline double
 272 evdev_convert_to_mm(const struct input_absinfo *absinfo, double v)
 273 {
 274         double value = v - absinfo->minimum;
 275         return value/absinfo->resolution;
 276 }
 277
 278 #endif /* EVDEV_H */