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 };
  57
  58 struct mt_slot {
  59         int32_t seat_slot;
  60         int32_t x, y;
  61 };
  62
  63 struct evdev_device {
  64         struct libinput_device base;
  65
  66         struct libinput_source *source;
  67
  68         struct evdev_dispatch *dispatch;
  69         struct libevdev *evdev;
  70         char *output_name;
  71         char *devnode;
  72         char *sysname;
  73         char *syspath;
  74         const char *devname;
  75         int fd;
  76         struct {
  77                 const struct input_absinfo *absinfo_x, *absinfo_y;
  78                 int fake_resolution;
  79
  80                 int32_t x, y;
  81                 int32_t seat_slot;
  82
  83                 int apply_calibration;
  84                 struct matrix calibration;
  85                 struct matrix default_calibration; /* from LIBINPUT_CALIBRATION_MATRIX */
  86                 struct matrix usermatrix; /* as supplied by the caller */
  87         } abs;
  88
  89         struct {
  90                 int slot;
  91                 struct mt_slot *slots;
  92                 size_t slots_len;
  93         } mt;
  94         struct mtdev *mtdev;
  95
  96         struct {
  97                 int dx, dy;
  98         } rel;
  99
 100         struct {
 101                 struct libinput_timer timer;
 102                 bool has_middle_button_scroll;
 103                 bool middle_button_scroll_active;
 104                 double threshold;
 105                 uint32_t direction;
 106         } scroll;
 107
 108         enum evdev_event_type pending_event;
 109         enum evdev_device_seat_capability seat_caps;
 110         enum evdev_device_tags tags;
 111
 112         int is_mt;
 113
 114         struct {
 115                 struct motion_filter *filter;
 116         } pointer;
 117
 118         /* Bitmask of pressed keys used to ignore initial release events from
 119          * the kernel. */
 120         unsigned long hw_key_mask[NLONGS(KEY_CNT)];
 121         /* Key counter used for multiplexing button events internally in
 122          * libinput. */
 123         uint8_t key_count[KEY_CNT];
 124 };
 125
 126 #define EVDEV_UNHANDLED_DEVICE ((struct evdev_device *) 1)
 127
 128 struct evdev_dispatch;
 129
 130 struct evdev_dispatch_interface {
 131         /* Process an evdev input event. */
 132         void (*process)(struct evdev_dispatch *dispatch,
 133                         struct evdev_device *device,
 134                         struct input_event *event,
 135                         uint64_t time);
 136
 137         /* Destroy an event dispatch handler and free all its resources. */
 138         void (*destroy)(struct evdev_dispatch *dispatch);
 139
 140         /* A new device was added */
 141         void (*device_added)(struct evdev_device *device,
 142                              struct evdev_device *added_device);
 143
 144         /* A device was removed */
 145         void (*device_removed)(struct evdev_device *device,
 146                                struct evdev_device *removed_device);
 147
 148         /* Tag device with one of EVDEV_TAG */
 149         void (*tag_device)(struct evdev_device *device,
 150                            struct udev_device *udev_device);
 151 };
 152
 153 struct evdev_dispatch {
 154         struct evdev_dispatch_interface *interface;
 155         struct libinput_device_config_calibration calibration;
 156
 157         struct {
 158                 struct libinput_device_config_send_events config;
 159                 enum libinput_config_send_events_mode current_mode;
 160         } sendevents;
 161 };
 162
 163 struct evdev_device *
 164 evdev_device_create(struct libinput_seat *seat,
 165                     const char *devnode,
 166                     const char *sysname,
 167                     const char *syspath);
 168
 169 struct evdev_dispatch *
 170 evdev_touchpad_create(struct evdev_device *device);
 171
 172 struct evdev_dispatch *
 173 evdev_mt_touchpad_create(struct evdev_device *device);
 174
 175 void
 176 evdev_device_proces_event(struct libinput_event *event);
 177
 178 void
 179 evdev_device_led_update(struct evdev_device *device, enum libinput_led leds);
 180
 181 int
 182 evdev_device_get_keys(struct evdev_device *device, char *keys, size_t size);
 183
 184 const char *
 185 evdev_device_get_output(struct evdev_device *device);
 186
 187 const char *
 188 evdev_device_get_sysname(struct evdev_device *device);
 189
 190 const char *
 191 evdev_device_get_name(struct evdev_device *device);
 192
 193 unsigned int
 194 evdev_device_get_id_product(struct evdev_device *device);
 195
 196 unsigned int
 197 evdev_device_get_id_vendor(struct evdev_device *device);
 198
 199 void
 200 evdev_device_set_default_calibration(struct evdev_device *device,
 201                                      const float calibration[6]);
 202 void
 203 evdev_device_calibrate(struct evdev_device *device,
 204                        const float calibration[6]);
 205
 206 int
 207 evdev_device_has_capability(struct evdev_device *device,
 208                             enum libinput_device_capability capability);
 209
 210 int
 211 evdev_device_get_size(struct evdev_device *device,
 212                       double *w,
 213                       double *h);
 214
 215 double
 216 evdev_device_transform_x(struct evdev_device *device,
 217                          double x,
 218                          uint32_t width);
 219
 220 double
 221 evdev_device_transform_y(struct evdev_device *device,
 222                          double y,
 223                          uint32_t height);
 224 int
 225 evdev_device_suspend(struct evdev_device *device);
 226
 227 int
 228 evdev_device_resume(struct evdev_device *device);
 229
 230 void
 231 evdev_keyboard_notify_key(struct evdev_device *device,
 232                           uint32_t time,
 233                           int key,
 234                           enum libinput_key_state state);
 235
 236 void
 237 evdev_pointer_notify_button(struct evdev_device *device,
 238                             uint32_t time,
 239                             int button,
 240                             enum libinput_button_state state);
 241
 242 void
 243 evdev_post_scroll(struct evdev_device *device,
 244                   uint64_t time,
 245                   double dx,
 246                   double dy);
 247
 248
 249 void
 250 evdev_stop_scroll(struct evdev_device *device, uint64_t time);
 251
 252 void
 253 evdev_device_remove(struct evdev_device *device);
 254
 255 void
 256 evdev_device_destroy(struct evdev_device *device);
 257
 258 static inline double
 259 evdev_convert_to_mm(const struct input_absinfo *absinfo, double v)
 260 {
 261         double value = v - absinfo->minimum;
 262         return value/absinfo->resolution;
 263 }
 264
 265 #endif /* EVDEV_H */