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 LIBINPUT_EXPORT void
 384 libinput_destroy(struct libinput *libinput)
 385 {
 386         struct libinput_event *event;
 387         struct libinput_device *device, *next_device;
 388         struct libinput_seat *seat, *next_seat;
 389
 390         while ((event = libinput_get_event(libinput)))
 391                free(event);
 392         free(libinput->events);
 393
 394         list_for_each_safe(seat, next_seat, &libinput->seat_list, link) {
 395                 list_for_each_safe(device, next_device,
 396                                    &seat->devices_list,
 397                                    link)
 398                         libinput_device_unref(device);
 399
 400                 libinput_seat_unref(seat);
 401         }
 402
 403         close(libinput->epoll_fd);
 404         free(libinput);
 405 }
 406
 407 static enum libinput_event_class
 408 libinput_event_get_class(struct libinput_event *event)
 409 {
 410         switch (event->type) {
 411         case LIBINPUT_EVENT_ADDED_SEAT:
 412         case LIBINPUT_EVENT_REMOVED_SEAT:
 413         case LIBINPUT_EVENT_ADDED_DEVICE:
 414         case LIBINPUT_EVENT_REMOVED_DEVICE:
 415                 return LIBINPUT_EVENT_CLASS_BASE;
 416
 417         case LIBINPUT_EVENT_DEVICE_REGISTER_CAPABILITY:
 418         case LIBINPUT_EVENT_DEVICE_UNREGISTER_CAPABILITY:
 419         case LIBINPUT_EVENT_KEYBOARD_KEY:
 420         case LIBINPUT_EVENT_POINTER_MOTION:
 421         case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
 422         case LIBINPUT_EVENT_POINTER_BUTTON:
 423         case LIBINPUT_EVENT_POINTER_AXIS:
 424         case LIBINPUT_EVENT_TOUCH_TOUCH:
 425                 return LIBINPUT_EVENT_CLASS_DEVICE;
 426         }
 427
 428         /* We should never end up here. */
 429         abort();
 430 }
 431
 432 LIBINPUT_EXPORT void
 433 libinput_event_destroy(struct libinput_event *event)
 434 {
 435         if (event == NULL)
 436                 return;
 437
 438         switch (libinput_event_get_class(event)) {
 439         case LIBINPUT_EVENT_CLASS_BASE:
 440                 break;
 441         case LIBINPUT_EVENT_CLASS_SEAT:
 442                 libinput_seat_unref(event->target.seat);
 443                 break;
 444         case LIBINPUT_EVENT_CLASS_DEVICE:
 445                 libinput_device_unref(event->target.device);
 446                 break;
 447         }
 448
 449         free(event);
 450 }
 451
 452 int
 453 open_restricted(struct libinput *libinput,
 454                 const char *path, int flags)
 455 {
 456         return libinput->interface->open_restricted(path,
 457                                                     flags,
 458                                                     libinput->user_data);
 459 }
 460
 461 void
 462 close_restricted(struct libinput *libinput, int fd)
 463 {
 464         return libinput->interface->close_restricted(fd, libinput->user_data);
 465 }
 466
 467 void
 468 libinput_seat_init(struct libinput_seat *seat,
 469                    struct libinput *libinput,
 470                    const char *name)
 471 {
 472         seat->refcount = 1;
 473         seat->libinput = libinput;
 474         seat->name = strdup(name);
 475         list_init(&seat->devices_list);
 476 }
 477
 478 LIBINPUT_EXPORT void
 479 libinput_seat_ref(struct libinput_seat *seat)
 480 {
 481         seat->refcount++;
 482 }
 483
 484 LIBINPUT_EXPORT void
 485 libinput_seat_unref(struct libinput_seat *seat)
 486 {
 487         seat->refcount--;
 488         if (seat->refcount == 0) {
 489                 free(seat->name);
 490                 udev_seat_destroy((struct udev_seat *) seat);
 491         }
 492 }
 493
 494 LIBINPUT_EXPORT void
 495 libinput_seat_set_user_data(struct libinput_seat *seat, void *user_data)
 496 {
 497         seat->user_data = user_data;
 498 }
 499
 500 LIBINPUT_EXPORT void *
 501 libinput_seat_get_user_data(struct libinput_seat *seat)
 502 {
 503         return seat->user_data;
 504 }
 505
 506 LIBINPUT_EXPORT const char *
 507 libinput_seat_get_name(struct libinput_seat *seat)
 508 {
 509         return seat->name;
 510 }
 511
 512 void
 513 libinput_device_init(struct libinput_device *device,
 514                      struct libinput_seat *seat)
 515 {
 516         device->seat = seat;
 517         device->refcount = 1;
 518 }
 519
 520 LIBINPUT_EXPORT void
 521 libinput_device_ref(struct libinput_device *device)
 522 {
 523         device->refcount++;
 524 }
 525
 526 LIBINPUT_EXPORT void
 527 libinput_device_unref(struct libinput_device *device)
 528 {
 529         device->refcount--;
 530         if (device->refcount == 0)
 531                 evdev_device_destroy((struct evdev_device *) device);
 532 }
 533
 534 LIBINPUT_EXPORT int
 535 libinput_get_fd(struct libinput *libinput)
 536 {
 537         return libinput->epoll_fd;
 538 }
 539
 540 LIBINPUT_EXPORT int
 541 libinput_dispatch(struct libinput *libinput)
 542 {
 543         struct libinput_source *source, *next;
 544         struct epoll_event ep[32];
 545         int i, count;
 546
 547         count = epoll_wait(libinput->epoll_fd, ep, ARRAY_LENGTH(ep), 0);
 548         if (count < 0)
 549                 return -errno;
 550
 551         for (i = 0; i < count; ++i) {
 552                 source = ep[i].data.ptr;
 553                 if (source->fd == -1)
 554                         continue;
 555
 556                 source->dispatch(source->user_data);
 557         }
 558
 559         list_for_each_safe(source, next, &libinput->source_destroy_list, link)
 560                 free(source);
 561         list_init(&libinput->source_destroy_list);
 562
 563         return 0;
 564 }
 565
 566 static void
 567 init_event_base(struct libinput_event *event,
 568                 enum libinput_event_type type,
 569                 union libinput_event_target target)
 570 {
 571         event->type = type;
 572         event->target = target;
 573 }
 574
 575 static void
 576 post_base_event(struct libinput *libinput,
 577                 enum libinput_event_type type,
 578                 struct libinput_event *event)
 579 {
 580         init_event_base(event, type,
 581                         (union libinput_event_target) { .libinput = libinput });
 582         libinput_post_event(libinput, event);
 583 }
 584
 585 static void
 586 post_device_event(struct libinput_device *device,
 587                   enum libinput_event_type type,
 588                   struct libinput_event *event)
 589 {
 590         init_event_base(event, type,
 591                         (union libinput_event_target) { .device = device });
 592         libinput_post_event(device->seat->libinput, event);
 593 }
 594
 595 void
 596 notify_added_seat(struct libinput_seat *seat)
 597 {
 598         struct libinput_event_added_seat *added_seat_event;
 599
 600         added_seat_event = malloc(sizeof *added_seat_event);
 601         if (!added_seat_event)
 602                 return;
 603
 604         *added_seat_event = (struct libinput_event_added_seat) {
 605                 .seat = seat,
 606         };
 607
 608         post_base_event(seat->libinput,
 609                         LIBINPUT_EVENT_ADDED_SEAT,
 610                         &added_seat_event->base);
 611 }
 612
 613 void
 614 notify_removed_seat(struct libinput_seat *seat)
 615 {
 616         struct libinput_event_removed_seat *removed_seat_event;
 617
 618         removed_seat_event = malloc(sizeof *removed_seat_event);
 619         if (!removed_seat_event)
 620                 return;
 621
 622         *removed_seat_event = (struct libinput_event_removed_seat) {
 623                 .seat = seat,
 624         };
 625
 626         post_base_event(seat->libinput,
 627                         LIBINPUT_EVENT_REMOVED_SEAT,
 628                         &removed_seat_event->base);
 629 }
 630
 631 void
 632 notify_added_device(struct libinput_device *device)
 633 {
 634         struct libinput_event_added_device *added_device_event;
 635
 636         added_device_event = malloc(sizeof *added_device_event);
 637         if (!added_device_event)
 638                 return;
 639
 640         *added_device_event = (struct libinput_event_added_device) {
 641                 .device = device,
 642         };
 643
 644         post_base_event(device->seat->libinput,
 645                         LIBINPUT_EVENT_ADDED_DEVICE,
 646                         &added_device_event->base);
 647 }
 648
 649 void
 650 notify_removed_device(struct libinput_device *device)
 651 {
 652         struct libinput_event_removed_device *removed_device_event;
 653
 654         removed_device_event = malloc(sizeof *removed_device_event);
 655         if (!removed_device_event)
 656                 return;
 657
 658         *removed_device_event = (struct libinput_event_removed_device) {
 659                 .device = device,
 660         };
 661
 662         post_base_event(device->seat->libinput,
 663                         LIBINPUT_EVENT_REMOVED_DEVICE,
 664                         &removed_device_event->base);
 665 }
 666
 667 void
 668 device_register_capability(struct libinput_device *device,
 669                            enum libinput_device_capability capability)
 670 {
 671         struct libinput_event_device_register_capability *capability_event;
 672
 673         capability_event = malloc(sizeof *capability_event);
 674
 675         *capability_event = (struct libinput_event_device_register_capability) {
 676                 .capability = capability,
 677         };
 678
 679         post_device_event(device,
 680                           LIBINPUT_EVENT_DEVICE_REGISTER_CAPABILITY,
 681                           &capability_event->base);
 682 }
 683
 684 void
 685 device_unregister_capability(struct libinput_device *device,
 686                              enum libinput_device_capability capability)
 687 {
 688         struct libinput_event_device_unregister_capability *capability_event;
 689
 690         capability_event = malloc(sizeof *capability_event);
 691
 692         *capability_event = (struct libinput_event_device_unregister_capability) {
 693                 .capability = capability,
 694         };
 695
 696         post_device_event(device,
 697                           LIBINPUT_EVENT_DEVICE_UNREGISTER_CAPABILITY,
 698                           &capability_event->base);
 699 }
 700
 701 void
 702 keyboard_notify_key(struct libinput_device *device,
 703                     uint32_t time,
 704                     uint32_t key,
 705                     enum libinput_keyboard_key_state state)
 706 {
 707         struct libinput_event_keyboard_key *key_event;
 708
 709         key_event = malloc(sizeof *key_event);
 710         if (!key_event)
 711                 return;
 712
 713         *key_event = (struct libinput_event_keyboard_key) {
 714                 .time = time,
 715                 .key = key,
 716                 .state = state,
 717         };
 718
 719         post_device_event(device,
 720                           LIBINPUT_EVENT_KEYBOARD_KEY,
 721                           &key_event->base);
 722 }
 723
 724 void
 725 pointer_notify_motion(struct libinput_device *device,
 726                       uint32_t time,
 727                       li_fixed_t dx,
 728                       li_fixed_t dy)
 729 {
 730         struct libinput_event_pointer_motion *motion_event;
 731
 732         motion_event = malloc(sizeof *motion_event);
 733         if (!motion_event)
 734                 return;
 735
 736         *motion_event = (struct libinput_event_pointer_motion) {
 737                 .time = time,
 738                 .dx = dx,
 739                 .dy = dy,
 740         };
 741
 742         post_device_event(device,
 743                           LIBINPUT_EVENT_POINTER_MOTION,
 744                           &motion_event->base);
 745 }
 746
 747 void
 748 pointer_notify_motion_absolute(struct libinput_device *device,
 749                                uint32_t time,
 750                                li_fixed_t x,
 751                                li_fixed_t y)
 752 {
 753         struct libinput_event_pointer_motion_absolute *motion_absolute_event;
 754
 755         motion_absolute_event = malloc(sizeof *motion_absolute_event);
 756         if (!motion_absolute_event)
 757                 return;
 758
 759         *motion_absolute_event = (struct libinput_event_pointer_motion_absolute) {
 760                 .time = time,
 761                 .x = x,
 762                 .y = y,
 763         };
 764
 765         post_device_event(device,
 766                           LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE,
 767                           &motion_absolute_event->base);
 768 }
 769
 770 void
 771 pointer_notify_button(struct libinput_device *device,
 772                       uint32_t time,
 773                       int32_t button,
 774                       enum libinput_pointer_button_state state)
 775 {
 776         struct libinput_event_pointer_button *button_event;
 777
 778         button_event = malloc(sizeof *button_event);
 779         if (!button_event)
 780                 return;
 781
 782         *button_event = (struct libinput_event_pointer_button) {
 783                 .time = time,
 784                 .button = button,
 785                 .state = state,
 786         };
 787
 788         post_device_event(device,
 789                           LIBINPUT_EVENT_POINTER_BUTTON,
 790                           &button_event->base);
 791 }
 792
 793 void
 794 pointer_notify_axis(struct libinput_device *device,
 795                     uint32_t time,
 796                     enum libinput_pointer_axis axis,
 797                     li_fixed_t value)
 798 {
 799         struct libinput_event_pointer_axis *axis_event;
 800
 801         axis_event = malloc(sizeof *axis_event);
 802         if (!axis_event)
 803                 return;
 804
 805         *axis_event = (struct libinput_event_pointer_axis) {
 806                 .time = time,
 807                 .axis = axis,
 808                 .value = value,
 809         };
 810
 811         post_device_event(device,
 812                           LIBINPUT_EVENT_POINTER_AXIS,
 813                           &axis_event->base);
 814 }
 815
 816 void
 817 touch_notify_touch(struct libinput_device *device,
 818                    uint32_t time,
 819                    int32_t slot,
 820                    li_fixed_t x,
 821                    li_fixed_t y,
 822                    enum libinput_touch_type touch_type)
 823 {
 824         struct libinput_event_touch_touch *touch_event;
 825
 826         touch_event = malloc(sizeof *touch_event);
 827         if (!touch_event)
 828                 return;
 829
 830         *touch_event = (struct libinput_event_touch_touch) {
 831                 .time = time,
 832                 .slot = slot,
 833                 .x = x,
 834                 .y = y,
 835                 .touch_type = touch_type,
 836         };
 837
 838         post_device_event(device,
 839                           LIBINPUT_EVENT_TOUCH_TOUCH,
 840                           &touch_event->base);
 841 }
 842
 843 static void
 844 libinput_post_event(struct libinput *libinput,
 845                     struct libinput_event *event)
 846 {
 847         struct libinput_event **events = libinput->events;
 848         size_t events_len = libinput->events_len;
 849         size_t events_count = libinput->events_count;
 850         size_t move_len;
 851         size_t new_out;
 852
 853         events_count++;
 854         if (events_count > events_len) {
 855                 if (events_len == 0)
 856                         events_len = 4;
 857                 else
 858                         events_len *= 2;
 859                 events = realloc(events, events_len * sizeof *events);
 860                 if (!events) {
 861                         fprintf(stderr, "Failed to reallocate event ring "
 862                                 "buffer");
 863                         return;
 864                 }
 865
 866                 if (libinput->events_count > 0 && libinput->events_in == 0) {
 867                         libinput->events_in = libinput->events_len;
 868                 } else if (libinput->events_count > 0 &&
 869                            libinput->events_out >= libinput->events_in) {
 870                         move_len = libinput->events_len - libinput->events_out;
 871                         new_out = events_len - move_len;
 872                         memmove(events + new_out,
 873                                 libinput->events + libinput->events_out,
 874                                 move_len * sizeof *events);
 875                         libinput->events_out = new_out;
 876                 }
 877
 878                 libinput->events = events;
 879                 libinput->events_len = events_len;
 880         }
 881
 882         switch (libinput_event_get_class(event)) {
 883         case LIBINPUT_EVENT_CLASS_BASE:
 884                 break;
 885         case LIBINPUT_EVENT_CLASS_SEAT:
 886                 libinput_seat_ref(event->target.seat);
 887                 break;
 888         case LIBINPUT_EVENT_CLASS_DEVICE:
 889                 libinput_device_ref(event->target.device);
 890                 break;
 891         }
 892
 893         libinput->events_count = events_count;
 894         events[libinput->events_in] = event;
 895         libinput->events_in = (libinput->events_in + 1) % libinput->events_len;
 896 }
 897
 898 LIBINPUT_EXPORT struct libinput_event *
 899 libinput_get_event(struct libinput *libinput)
 900 {
 901         struct libinput_event *event;
 902
 903         if (libinput->events_count == 0)
 904                 return NULL;
 905
 906         event = libinput->events[libinput->events_out];
 907         libinput->events_out =
 908                 (libinput->events_out + 1) % libinput->events_len;
 909         libinput->events_count--;
 910
 911         return event;
 912 }
 913
 914 LIBINPUT_EXPORT void *
 915 libinput_get_user_data(struct libinput *libinput)
 916 {
 917         return libinput->user_data;
 918 }
 919
 920 LIBINPUT_EXPORT int
 921 libinput_resume(struct libinput *libinput)
 922 {
 923         return udev_input_enable((struct udev_input *) libinput);
 924 }
 925
 926 LIBINPUT_EXPORT void
 927 libinput_suspend(struct libinput *libinput)
 928 {
 929         udev_input_disable((struct udev_input *) libinput);
 930 }
 931
 932 LIBINPUT_EXPORT void
 933 libinput_device_set_user_data(struct libinput_device *device, void *user_data)
 934 {
 935         device->user_data = user_data;
 936 }
 937
 938 LIBINPUT_EXPORT void *
 939 libinput_device_get_user_data(struct libinput_device *device)
 940 {
 941         return device->user_data;
 942 }
 943
 944 LIBINPUT_EXPORT const char *
 945 libinput_device_get_sysname(struct libinput_device *device)
 946 {
 947         return evdev_device_get_sysname((struct evdev_device *) device);
 948 }
 949
 950 LIBINPUT_EXPORT const char *
 951 libinput_device_get_output_name(struct libinput_device *device)
 952 {
 953         return evdev_device_get_output((struct evdev_device *) device);
 954 }
 955
 956 LIBINPUT_EXPORT struct libinput_seat *
 957 libinput_device_get_seat(struct libinput_device *device)
 958 {
 959         return device->seat;
 960 }
 961
 962 LIBINPUT_EXPORT void
 963 libinput_device_led_update(struct libinput_device *device,
 964                            enum libinput_led leds)
 965 {
 966         evdev_device_led_update((struct evdev_device *) device, leds);
 967 }
 968
 969 LIBINPUT_EXPORT int
 970 libinput_device_get_keys(struct libinput_device *device,
 971                          char *keys, size_t size)
 972 {
 973         return evdev_device_get_keys((struct evdev_device *) device,
 974                                      keys,
 975                                      size);
 976 }
 977
 978 LIBINPUT_EXPORT void
 979 libinput_device_calibrate(struct libinput_device *device,
 980                           float calibration[6])
 981 {
 982         evdev_device_calibrate((struct evdev_device *) device, calibration);
 983 }
 984
 985 LIBINPUT_EXPORT int
 986 libinput_device_has_capability(struct libinput_device *device,
 987                                enum libinput_device_capability capability)
 988 {
 989         return evdev_device_has_capability((struct evdev_device *) device,
 990                                            capability);
 991 }