src/libinput.c

   1 /*
   2  * Copyright © 2013 Jonas Ådahl
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and
   5  * its documentation for any purpose is hereby granted without fee, provided
   6  * that the above copyright notice appear in all copies and that both that
   7  * copyright notice and this permission notice appear in supporting
   8  * documentation, and that the name of the copyright holders not be used in
   9  * advertising or publicity pertaining to distribution of the software
  10  * without specific, written prior permission.  The copyright holders make
  11  * no representations about the suitability of this software for any
  12  * purpose.  It is provided "as is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  15  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  16  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  17  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  18  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  19  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  20  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21  */
  22
  23 #include "config.h"
  24
  25 #include <errno.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <sys/epoll.h>
  30 #include <unistd.h>
  31 #include <assert.h>
  32
  33 #include "libinput.h"
  34 #include "libinput-private.h"
  35 #include "evdev.h"
  36 #include "udev-seat.h"
  37
  38 enum libinput_event_class {
  39         LIBINPUT_EVENT_CLASS_BASE,
  40         LIBINPUT_EVENT_CLASS_SEAT,
  41         LIBINPUT_EVENT_CLASS_DEVICE,
  42 };
  43
  44 struct libinput_source {
  45         libinput_source_dispatch_t dispatch;
  46         void *user_data;
  47         int fd;
  48         struct list link;
  49 };
  50
  51 struct libinput_event {
  52         enum libinput_event_type type;
  53         union libinput_event_target target;
  54 };
  55
  56 struct libinput_event_added_seat {
  57         struct libinput_event base;
  58         struct libinput_seat *seat;
  59 };
  60
  61 struct libinput_event_removed_seat {
  62         struct libinput_event base;
  63         struct libinput_seat *seat;
  64 };
  65
  66 struct libinput_event_added_device {
  67         struct libinput_event base;
  68         struct libinput_device *device;
  69 };
  70
  71 struct libinput_event_removed_device {
  72         struct libinput_event base;
  73         struct libinput_device *device;
  74 };
  75
  76 struct libinput_event_device_register_capability {
  77         struct libinput_event base;
  78         enum libinput_device_capability capability;
  79 };
  80
  81 struct libinput_event_device_unregister_capability {
  82         struct libinput_event base;
  83         enum libinput_device_capability capability;
  84 };
  85
  86 struct libinput_event_keyboard_key {
  87         struct libinput_event base;
  88         uint32_t time;
  89         uint32_t key;
  90         enum libinput_keyboard_key_state state;
  91 };
  92
  93 struct libinput_event_pointer_motion {
  94         struct libinput_event base;
  95         uint32_t time;
  96         li_fixed_t dx;
  97         li_fixed_t dy;
  98 };
  99
 100 struct libinput_event_pointer_motion_absolute {
 101         struct libinput_event base;
 102         uint32_t time;
 103         li_fixed_t x;
 104         li_fixed_t y;
 105 };
 106
 107 struct libinput_event_pointer_button {
 108         struct libinput_event base;
 109         uint32_t time;
 110         uint32_t button;
 111         enum libinput_pointer_button_state state;
 112 };
 113
 114 struct libinput_event_pointer_axis {
 115         struct libinput_event base;
 116         uint32_t time;
 117         enum libinput_pointer_axis axis;
 118         li_fixed_t value;
 119 };
 120
 121 struct libinput_event_touch_touch {
 122         struct libinput_event base;
 123         uint32_t time;
 124         uint32_t slot;
 125         li_fixed_t x;
 126         li_fixed_t y;
 127         enum libinput_touch_type touch_type;
 128 };
 129
 130 static void
 131 libinput_post_event(struct libinput *libinput,
 132                     struct libinput_event *event);
 133
 134 LIBINPUT_EXPORT enum libinput_event_type
 135 libinput_event_get_type(struct libinput_event *event)
 136 {
 137         return event->type;
 138 }
 139
 140 LIBINPUT_EXPORT union libinput_event_target
 141 libinput_event_get_target(struct libinput_event *event)
 142 {
 143         return event->target;
 144 }
 145
 146 LIBINPUT_EXPORT struct libinput_seat *
 147 libinput_event_added_seat_get_seat(struct libinput_event_added_seat *event)
 148 {
 149         return event->seat;
 150 }
 151
 152 LIBINPUT_EXPORT struct libinput_seat *
 153 libinput_event_removed_seat_get_seat(struct libinput_event_removed_seat *event)
 154 {
 155         return event->seat;
 156 }
 157
 158 LIBINPUT_EXPORT struct libinput_device *
 159 libinput_event_added_device_get_device(
 160         struct libinput_event_added_device *event)
 161 {
 162         return event->device;
 163 }
 164
 165 LIBINPUT_EXPORT struct libinput_device *
 166 libinput_event_removed_device_get_device(
 167         struct libinput_event_removed_device *event)
 168 {
 169         return event->device;
 170 }
 171
 172 LIBINPUT_EXPORT enum libinput_device_capability
 173 libinput_event_device_register_capability_get_capability(
 174         struct libinput_event_device_register_capability *event)
 175 {
 176         return event->capability;
 177 }
 178
 179 LIBINPUT_EXPORT enum libinput_device_capability
 180 libinput_event_device_unregister_capability_get_capability(
 181         struct libinput_event_device_unregister_capability *event)
 182 {
 183         return event->capability;
 184 }
 185
 186 LIBINPUT_EXPORT uint32_t
 187 libinput_event_keyboard_key_get_time(
 188         struct libinput_event_keyboard_key *event)
 189 {
 190         return event->time;
 191 }
 192
 193 LIBINPUT_EXPORT uint32_t
 194 libinput_event_keyboard_key_get_key(
 195         struct libinput_event_keyboard_key *event)
 196 {
 197         return event->key;
 198 }
 199
 200 LIBINPUT_EXPORT enum libinput_keyboard_key_state
 201 libinput_event_keyboard_key_get_state(
 202         struct libinput_event_keyboard_key *event)
 203 {
 204         return event->state;
 205 }
 206
 207 LIBINPUT_EXPORT uint32_t
 208 libinput_event_pointer_motion_get_time(
 209         struct libinput_event_pointer_motion *event)
 210 {
 211         return event->time;
 212 }
 213
 214 LIBINPUT_EXPORT li_fixed_t
 215 libinput_event_pointer_motion_get_dx(
 216         struct libinput_event_pointer_motion *event)
 217 {
 218         return event->dx;
 219 }
 220
 221 LIBINPUT_EXPORT li_fixed_t
 222 libinput_event_pointer_motion_get_dy(
 223         struct libinput_event_pointer_motion *event)
 224 {
 225         return event->dy;
 226 }
 227
 228 LIBINPUT_EXPORT uint32_t
 229 libinput_event_pointer_motion_absolute_get_time(
 230         struct libinput_event_pointer_motion_absolute *event)
 231 {
 232         return event->time;
 233 }
 234
 235 LIBINPUT_EXPORT li_fixed_t
 236 libinput_event_pointer_motion_absolute_get_x(
 237         struct libinput_event_pointer_motion_absolute *event)
 238 {
 239         return event->x;
 240 }
 241
 242 LIBINPUT_EXPORT li_fixed_t
 243 libinput_event_pointer_motion_absolute_get_y(
 244         struct libinput_event_pointer_motion_absolute *event)
 245 {
 246         return event->y;
 247 }
 248
 249 LIBINPUT_EXPORT uint32_t
 250 libinput_event_pointer_button_get_time(
 251         struct libinput_event_pointer_button *event)
 252 {
 253         return event->time;
 254 }
 255
 256 LIBINPUT_EXPORT uint32_t
 257 libinput_event_pointer_button_get_button(
 258         struct libinput_event_pointer_button *event)
 259 {
 260         return event->button;
 261 }
 262
 263 LIBINPUT_EXPORT enum libinput_pointer_button_state
 264 libinput_event_pointer_button_get_state(
 265         struct libinput_event_pointer_button *event)
 266 {
 267         return event->state;
 268 }
 269
 270 LIBINPUT_EXPORT uint32_t
 271 libinput_event_pointer_axis_get_time(
 272         struct libinput_event_pointer_axis *event)
 273 {
 274         return event->time;
 275 }
 276
 277 LIBINPUT_EXPORT enum libinput_pointer_axis
 278 libinput_event_pointer_axis_get_axis(
 279         struct libinput_event_pointer_axis *event)
 280 {
 281         return event->axis;
 282 }
 283
 284 LIBINPUT_EXPORT li_fixed_t
 285 libinput_event_pointer_axis_get_value(
 286         struct libinput_event_pointer_axis *event)
 287 {
 288         return event->value;
 289 }
 290
 291 LIBINPUT_EXPORT uint32_t
 292 libinput_event_touch_touch_get_time(
 293         struct libinput_event_touch_touch *event)
 294 {
 295         return event->time;
 296 }
 297
 298 LIBINPUT_EXPORT uint32_t
 299 libinput_event_touch_touch_get_slot(
 300         struct libinput_event_touch_touch *event)
 301 {
 302         return event->slot;
 303 }
 304
 305 LIBINPUT_EXPORT li_fixed_t
 306 libinput_event_touch_touch_get_x(
 307         struct libinput_event_touch_touch *event)
 308 {
 309         return event->x;
 310 }
 311
 312 LIBINPUT_EXPORT li_fixed_t
 313 libinput_event_touch_touch_get_y(
 314         struct libinput_event_touch_touch *event)
 315 {
 316         return event->y;
 317 }
 318
 319 LIBINPUT_EXPORT enum libinput_touch_type
 320 libinput_event_touch_touch_get_touch_type(
 321         struct libinput_event_touch_touch *event)
 322 {
 323         return event->touch_type;
 324 }
 325
 326 struct libinput_source *
 327 libinput_add_fd(struct libinput *libinput,
 328                 int fd,
 329                 libinput_source_dispatch_t dispatch,
 330                 void *user_data)
 331 {
 332         struct libinput_source *source;
 333         struct epoll_event ep;
 334
 335         source = malloc(sizeof *source);
 336         if (!source)
 337                 return NULL;
 338
 339         source->dispatch = dispatch;
 340         source->user_data = user_data;
 341         source->fd = fd;
 342
 343         memset(&ep, 0, sizeof ep);
 344         ep.events = EPOLLIN;
 345         ep.data.ptr = source;
 346
 347         if (epoll_ctl(libinput->epoll_fd, EPOLL_CTL_ADD, fd, &ep) < 0) {
 348                 close(source->fd);
 349                 free(source);
 350                 return NULL;
 351         }
 352
 353         return source;
 354 }
 355
 356 void
 357 libinput_remove_source(struct libinput *libinput,
 358                        struct libinput_source *source)
 359 {
 360         epoll_ctl(libinput->epoll_fd, EPOLL_CTL_DEL, source->fd, NULL);
 361         close(source->fd);
 362         source->fd = -1;
 363         list_insert(&libinput->source_destroy_list, &source->link);
 364 }
 365
 366 int
 367 libinput_init(struct libinput *libinput,
 368               const struct libinput_interface *interface,
 369               void *user_data)
 370 {
 371         libinput->epoll_fd = epoll_create1(EPOLL_CLOEXEC);;
 372         if (libinput->epoll_fd < 0)
 373                 return -1;
 374
 375         libinput->interface = interface;
 376         libinput->user_data = user_data;
 377         list_init(&libinput->source_destroy_list);
 378         list_init(&libinput->seat_list);
 379
 380         return 0;
 381 }
 382
 383 static void
 384 libinput_device_destroy(struct libinput_device *device);
 385
 386 static void
 387 libinput_seat_destroy(struct libinput_seat *seat);
 388
 389 LIBINPUT_EXPORT void
 390 libinput_destroy(struct libinput *libinput)
 391 {
 392         struct libinput_event *event;
 393         struct libinput_device *device, *next_device;
 394         struct libinput_seat *seat, *next_seat;
 395
 396         while ((event = libinput_get_event(libinput)))
 397                libinput_event_destroy(event);
 398         free(libinput->events);
 399
 400         list_for_each_safe(seat, next_seat, &libinput->seat_list, link) {
 401                 list_for_each_safe(device, next_device,
 402                                    &seat->devices_list,
 403                                    link)
 404                         libinput_device_destroy(device);
 405
 406                 libinput_seat_destroy(seat);
 407         }
 408
 409         close(libinput->epoll_fd);
 410         free(libinput);
 411 }
 412
 413 static enum libinput_event_class
 414 libinput_event_get_class(struct libinput_event *event)
 415 {
 416         switch (event->type) {
 417         case LIBINPUT_EVENT_ADDED_SEAT:
 418         case LIBINPUT_EVENT_REMOVED_SEAT:
 419         case LIBINPUT_EVENT_ADDED_DEVICE:
 420         case LIBINPUT_EVENT_REMOVED_DEVICE:
 421                 return LIBINPUT_EVENT_CLASS_BASE;
 422
 423         case LIBINPUT_EVENT_DEVICE_REGISTER_CAPABILITY:
 424         case LIBINPUT_EVENT_DEVICE_UNREGISTER_CAPABILITY:
 425         case LIBINPUT_EVENT_KEYBOARD_KEY:
 426         case LIBINPUT_EVENT_POINTER_MOTION:
 427         case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
 428         case LIBINPUT_EVENT_POINTER_BUTTON:
 429         case LIBINPUT_EVENT_POINTER_AXIS:
 430         case LIBINPUT_EVENT_TOUCH_TOUCH:
 431                 return LIBINPUT_EVENT_CLASS_DEVICE;
 432         }
 433
 434         /* We should never end up here. */
 435         abort();
 436 }
 437
 438 LIBINPUT_EXPORT void
 439 libinput_event_destroy(struct libinput_event *event)
 440 {
 441         if (event == NULL)
 442                 return;
 443
 444         switch (libinput_event_get_class(event)) {
 445         case LIBINPUT_EVENT_CLASS_BASE:
 446                 break;
 447         case LIBINPUT_EVENT_CLASS_SEAT:
 448                 libinput_seat_unref(event->target.seat);
 449                 break;
 450         case LIBINPUT_EVENT_CLASS_DEVICE:
 451                 libinput_device_unref(event->target.device);
 452                 break;
 453         }
 454
 455         free(event);
 456 }
 457
 458 int
 459 open_restricted(struct libinput *libinput,
 460                 const char *path, int flags)
 461 {
 462         return libinput->interface->open_restricted(path,
 463                                                     flags,
 464                                                     libinput->user_data);
 465 }
 466
 467 void
 468 close_restricted(struct libinput *libinput, int fd)
 469 {
 470         return libinput->interface->close_restricted(fd, libinput->user_data);
 471 }
 472
 473 void
 474 libinput_seat_init(struct libinput_seat *seat,
 475                    struct libinput *libinput,
 476                    const char *name)
 477 {
 478         seat->refcount = 1;
 479         seat->libinput = libinput;
 480         seat->name = strdup(name);
 481         list_init(&seat->devices_list);
 482 }
 483
 484 LIBINPUT_EXPORT void
 485 libinput_seat_ref(struct libinput_seat *seat)
 486 {
 487         seat->refcount++;
 488 }
 489
 490 static void
 491 libinput_seat_destroy(struct libinput_seat *seat)
 492 {
 493         free(seat->name);
 494         udev_seat_destroy((struct udev_seat *) seat);
 495 }
 496
 497 LIBINPUT_EXPORT void
 498 libinput_seat_unref(struct libinput_seat *seat)
 499 {
 500         seat->refcount--;
 501         if (seat->refcount == 0)
 502                 libinput_seat_destroy(seat);
 503 }
 504
 505 LIBINPUT_EXPORT void
 506 libinput_seat_set_user_data(struct libinput_seat *seat, void *user_data)
 507 {
 508         seat->user_data = user_data;
 509 }
 510
 511 LIBINPUT_EXPORT void *
 512 libinput_seat_get_user_data(struct libinput_seat *seat)
 513 {
 514         return seat->user_data;
 515 }
 516
 517 LIBINPUT_EXPORT const char *
 518 libinput_seat_get_name(struct libinput_seat *seat)
 519 {
 520         return seat->name;
 521 }
 522
 523 void
 524 libinput_device_init(struct libinput_device *device,
 525                      struct libinput_seat *seat)
 526 {
 527         device->seat = seat;
 528         device->refcount = 1;
 529 }
 530
 531 LIBINPUT_EXPORT void
 532 libinput_device_ref(struct libinput_device *device)
 533 {
 534         device->refcount++;
 535 }
 536
 537 static void
 538 libinput_device_destroy(struct libinput_device *device)
 539 {
 540         evdev_device_destroy((struct evdev_device *) device);
 541 }
 542
 543 LIBINPUT_EXPORT void
 544 libinput_device_unref(struct libinput_device *device)
 545 {
 546         device->refcount--;
 547         if (device->refcount == 0)
 548                 libinput_device_destroy(device);
 549 }
 550
 551 LIBINPUT_EXPORT int
 552 libinput_get_fd(struct libinput *libinput)
 553 {
 554         return libinput->epoll_fd;
 555 }
 556
 557 LIBINPUT_EXPORT int
 558 libinput_dispatch(struct libinput *libinput)
 559 {
 560         struct libinput_source *source, *next;
 561         struct epoll_event ep[32];
 562         int i, count;
 563
 564         count = epoll_wait(libinput->epoll_fd, ep, ARRAY_LENGTH(ep), 0);
 565         if (count < 0)
 566                 return -errno;
 567
 568         for (i = 0; i < count; ++i) {
 569                 source = ep[i].data.ptr;
 570                 if (source->fd == -1)
 571                         continue;
 572
 573                 source->dispatch(source->user_data);
 574         }
 575
 576         list_for_each_safe(source, next, &libinput->source_destroy_list, link)
 577                 free(source);
 578         list_init(&libinput->source_destroy_list);
 579
 580         return 0;
 581 }
 582
 583 static void
 584 init_event_base(struct libinput_event *event,
 585                 enum libinput_event_type type,
 586                 union libinput_event_target target)
 587 {
 588         event->type = type;
 589         event->target = target;
 590 }
 591
 592 static void
 593 post_base_event(struct libinput *libinput,
 594                 enum libinput_event_type type,
 595                 struct libinput_event *event)
 596 {
 597         init_event_base(event, type,
 598                         (union libinput_event_target) { .libinput = libinput });
 599         libinput_post_event(libinput, event);
 600 }
 601
 602 static void
 603 post_device_event(struct libinput_device *device,
 604                   enum libinput_event_type type,
 605                   struct libinput_event *event)
 606 {
 607         init_event_base(event, type,
 608                         (union libinput_event_target) { .device = device });
 609         libinput_post_event(device->seat->libinput, event);
 610 }
 611
 612 void
 613 notify_added_seat(struct libinput_seat *seat)
 614 {
 615         struct libinput_event_added_seat *added_seat_event;
 616
 617         added_seat_event = malloc(sizeof *added_seat_event);
 618         if (!added_seat_event)
 619                 return;
 620
 621         *added_seat_event = (struct libinput_event_added_seat) {
 622                 .seat = seat,
 623         };
 624
 625         post_base_event(seat->libinput,
 626                         LIBINPUT_EVENT_ADDED_SEAT,
 627                         &added_seat_event->base);
 628 }
 629
 630 void
 631 notify_removed_seat(struct libinput_seat *seat)
 632 {
 633         struct libinput_event_removed_seat *removed_seat_event;
 634
 635         removed_seat_event = malloc(sizeof *removed_seat_event);
 636         if (!removed_seat_event)
 637                 return;
 638
 639         *removed_seat_event = (struct libinput_event_removed_seat) {
 640                 .seat = seat,
 641         };
 642
 643         post_base_event(seat->libinput,
 644                         LIBINPUT_EVENT_REMOVED_SEAT,
 645                         &removed_seat_event->base);
 646 }
 647
 648 void
 649 notify_added_device(struct libinput_device *device)
 650 {
 651         struct libinput_event_added_device *added_device_event;
 652
 653         added_device_event = malloc(sizeof *added_device_event);
 654         if (!added_device_event)
 655                 return;
 656
 657         *added_device_event = (struct libinput_event_added_device) {
 658                 .device = device,
 659         };
 660
 661         post_base_event(device->seat->libinput,
 662                         LIBINPUT_EVENT_ADDED_DEVICE,
 663                         &added_device_event->base);
 664 }
 665
 666 void
 667 notify_removed_device(struct libinput_device *device)
 668 {
 669         struct libinput_event_removed_device *removed_device_event;
 670
 671         removed_device_event = malloc(sizeof *removed_device_event);
 672         if (!removed_device_event)
 673                 return;
 674
 675         *removed_device_event = (struct libinput_event_removed_device) {
 676                 .device = device,
 677         };
 678
 679         post_base_event(device->seat->libinput,
 680                         LIBINPUT_EVENT_REMOVED_DEVICE,
 681                         &removed_device_event->base);
 682 }
 683
 684 void
 685 device_register_capability(struct libinput_device *device,
 686                            enum libinput_device_capability capability)
 687 {
 688         struct libinput_event_device_register_capability *capability_event;
 689
 690         capability_event = malloc(sizeof *capability_event);
 691
 692         *capability_event = (struct libinput_event_device_register_capability) {
 693                 .capability = capability,
 694         };
 695
 696         post_device_event(device,
 697                           LIBINPUT_EVENT_DEVICE_REGISTER_CAPABILITY,
 698                           &capability_event->base);
 699 }
 700
 701 void
 702 device_unregister_capability(struct libinput_device *device,
 703                              enum libinput_device_capability capability)
 704 {
 705         struct libinput_event_device_unregister_capability *capability_event;
 706
 707         capability_event = malloc(sizeof *capability_event);
 708
 709         *capability_event = (struct libinput_event_device_unregister_capability) {
 710                 .capability = capability,
 711         };
 712
 713         post_device_event(device,
 714                           LIBINPUT_EVENT_DEVICE_UNREGISTER_CAPABILITY,
 715                           &capability_event->base);
 716 }
 717
 718 void
 719 keyboard_notify_key(struct libinput_device *device,
 720                     uint32_t time,
 721                     uint32_t key,
 722                     enum libinput_keyboard_key_state state)
 723 {
 724         struct libinput_event_keyboard_key *key_event;
 725
 726         key_event = malloc(sizeof *key_event);
 727         if (!key_event)
 728                 return;
 729
 730         *key_event = (struct libinput_event_keyboard_key) {
 731                 .time = time,
 732                 .key = key,
 733                 .state = state,
 734         };
 735
 736         post_device_event(device,
 737                           LIBINPUT_EVENT_KEYBOARD_KEY,
 738                           &key_event->base);
 739 }
 740
 741 void
 742 pointer_notify_motion(struct libinput_device *device,
 743                       uint32_t time,
 744                       li_fixed_t dx,
 745                       li_fixed_t dy)
 746 {
 747         struct libinput_event_pointer_motion *motion_event;
 748
 749         motion_event = malloc(sizeof *motion_event);
 750         if (!motion_event)
 751                 return;
 752
 753         *motion_event = (struct libinput_event_pointer_motion) {
 754                 .time = time,
 755                 .dx = dx,
 756                 .dy = dy,
 757         };
 758
 759         post_device_event(device,
 760                           LIBINPUT_EVENT_POINTER_MOTION,
 761                           &motion_event->base);
 762 }
 763
 764 void
 765 pointer_notify_motion_absolute(struct libinput_device *device,
 766                                uint32_t time,
 767                                li_fixed_t x,
 768                                li_fixed_t y)
 769 {
 770         struct libinput_event_pointer_motion_absolute *motion_absolute_event;
 771
 772         motion_absolute_event = malloc(sizeof *motion_absolute_event);
 773         if (!motion_absolute_event)
 774                 return;
 775
 776         *motion_absolute_event = (struct libinput_event_pointer_motion_absolute) {
 777                 .time = time,
 778                 .x = x,
 779                 .y = y,
 780         };
 781
 782         post_device_event(device,
 783                           LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE,
 784                           &motion_absolute_event->base);
 785 }
 786
 787 void
 788 pointer_notify_button(struct libinput_device *device,
 789                       uint32_t time,
 790                       int32_t button,
 791                       enum libinput_pointer_button_state state)
 792 {
 793         struct libinput_event_pointer_button *button_event;
 794
 795         button_event = malloc(sizeof *button_event);
 796         if (!button_event)
 797                 return;
 798
 799         *button_event = (struct libinput_event_pointer_button) {
 800                 .time = time,
 801                 .button = button,
 802                 .state = state,
 803         };
 804
 805         post_device_event(device,
 806                           LIBINPUT_EVENT_POINTER_BUTTON,
 807                           &button_event->base);
 808 }
 809
 810 void
 811 pointer_notify_axis(struct libinput_device *device,
 812                     uint32_t time,
 813                     enum libinput_pointer_axis axis,
 814                     li_fixed_t value)
 815 {
 816         struct libinput_event_pointer_axis *axis_event;
 817
 818         axis_event = malloc(sizeof *axis_event);
 819         if (!axis_event)
 820                 return;
 821
 822         *axis_event = (struct libinput_event_pointer_axis) {
 823                 .time = time,
 824                 .axis = axis,
 825                 .value = value,
 826         };
 827
 828         post_device_event(device,
 829                           LIBINPUT_EVENT_POINTER_AXIS,
 830                           &axis_event->base);
 831 }
 832
 833 void
 834 touch_notify_touch(struct libinput_device *device,
 835                    uint32_t time,
 836                    int32_t slot,
 837                    li_fixed_t x,
 838                    li_fixed_t y,
 839                    enum libinput_touch_type touch_type)
 840 {
 841         struct libinput_event_touch_touch *touch_event;
 842
 843         touch_event = malloc(sizeof *touch_event);
 844         if (!touch_event)
 845                 return;
 846
 847         *touch_event = (struct libinput_event_touch_touch) {
 848                 .time = time,
 849                 .slot = slot,
 850                 .x = x,
 851                 .y = y,
 852                 .touch_type = touch_type,
 853         };
 854
 855         post_device_event(device,
 856                           LIBINPUT_EVENT_TOUCH_TOUCH,
 857                           &touch_event->base);
 858 }
 859
 860 static void
 861 libinput_post_event(struct libinput *libinput,
 862                     struct libinput_event *event)
 863 {
 864         struct libinput_event **events = libinput->events;
 865         size_t events_len = libinput->events_len;
 866         size_t events_count = libinput->events_count;
 867         size_t move_len;
 868         size_t new_out;
 869
 870         events_count++;
 871         if (events_count > events_len) {
 872                 if (events_len == 0)
 873                         events_len = 4;
 874                 else
 875                         events_len *= 2;
 876                 events = realloc(events, events_len * sizeof *events);
 877                 if (!events) {
 878                         fprintf(stderr, "Failed to reallocate event ring "
 879                                 "buffer");
 880                         return;
 881                 }
 882
 883                 if (libinput->events_count > 0 && libinput->events_in == 0) {
 884                         libinput->events_in = libinput->events_len;
 885                 } else if (libinput->events_count > 0 &&
 886                            libinput->events_out >= libinput->events_in) {
 887                         move_len = libinput->events_len - libinput->events_out;
 888                         new_out = events_len - move_len;
 889                         memmove(events + new_out,
 890                                 libinput->events + libinput->events_out,
 891                                 move_len * sizeof *events);
 892                         libinput->events_out = new_out;
 893                 }
 894
 895                 libinput->events = events;
 896                 libinput->events_len = events_len;
 897         }
 898
 899         switch (libinput_event_get_class(event)) {
 900         case LIBINPUT_EVENT_CLASS_BASE:
 901                 break;
 902         case LIBINPUT_EVENT_CLASS_SEAT:
 903                 libinput_seat_ref(event->target.seat);
 904                 break;
 905         case LIBINPUT_EVENT_CLASS_DEVICE:
 906                 libinput_device_ref(event->target.device);
 907                 break;
 908         }
 909
 910         libinput->events_count = events_count;
 911         events[libinput->events_in] = event;
 912         libinput->events_in = (libinput->events_in + 1) % libinput->events_len;
 913 }
 914
 915 LIBINPUT_EXPORT struct libinput_event *
 916 libinput_get_event(struct libinput *libinput)
 917 {
 918         struct libinput_event *event;
 919
 920         if (libinput->events_count == 0)
 921                 return NULL;
 922
 923         event = libinput->events[libinput->events_out];
 924         libinput->events_out =
 925                 (libinput->events_out + 1) % libinput->events_len;
 926         libinput->events_count--;
 927
 928         return event;
 929 }
 930
 931 LIBINPUT_EXPORT void *
 932 libinput_get_user_data(struct libinput *libinput)
 933 {
 934         return libinput->user_data;
 935 }
 936
 937 LIBINPUT_EXPORT int
 938 libinput_resume(struct libinput *libinput)
 939 {
 940         return udev_input_enable((struct udev_input *) libinput);
 941 }
 942
 943 LIBINPUT_EXPORT void
 944 libinput_suspend(struct libinput *libinput)
 945 {
 946         udev_input_disable((struct udev_input *) libinput);
 947 }
 948
 949 LIBINPUT_EXPORT void
 950 libinput_device_set_user_data(struct libinput_device *device, void *user_data)
 951 {
 952         device->user_data = user_data;
 953 }
 954
 955 LIBINPUT_EXPORT void *
 956 libinput_device_get_user_data(struct libinput_device *device)
 957 {
 958         return device->user_data;
 959 }
 960
 961 LIBINPUT_EXPORT const char *
 962 libinput_device_get_sysname(struct libinput_device *device)
 963 {
 964         return evdev_device_get_sysname((struct evdev_device *) device);
 965 }
 966
 967 LIBINPUT_EXPORT const char *
 968 libinput_device_get_output_name(struct libinput_device *device)
 969 {
 970         return evdev_device_get_output((struct evdev_device *) device);
 971 }
 972
 973 LIBINPUT_EXPORT struct libinput_seat *
 974 libinput_device_get_seat(struct libinput_device *device)
 975 {
 976         return device->seat;
 977 }
 978
 979 LIBINPUT_EXPORT void
 980 libinput_device_led_update(struct libinput_device *device,
 981                            enum libinput_led leds)
 982 {
 983         evdev_device_led_update((struct evdev_device *) device, leds);
 984 }
 985
 986 LIBINPUT_EXPORT int
 987 libinput_device_get_keys(struct libinput_device *device,
 988                          char *keys, size_t size)
 989 {
 990         return evdev_device_get_keys((struct evdev_device *) device,
 991                                      keys,
 992                                      size);
 993 }
 994
 995 LIBINPUT_EXPORT void
 996 libinput_device_calibrate(struct libinput_device *device,
 997                           float calibration[6])
 998 {
 999         evdev_device_calibrate((struct evdev_device *) device, calibration);
1000 }
1001
1002 LIBINPUT_EXPORT int
1003 libinput_device_has_capability(struct libinput_device *device,
1004                                enum libinput_device_capability capability)
1005 {
1006         return evdev_device_has_capability((struct evdev_device *) device,
1007                                            capability);
1008 }