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libinput.c
943 lines (793 loc) · 20.6 KB
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libinput.c
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/*
* Copyright © 2013 Jonas Ådahl
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <unistd.h>
#include <assert.h>
#include "libinput.h"
#include "libinput-private.h"
#include "evdev.h"
struct libinput_source {
libinput_source_dispatch_t dispatch;
void *user_data;
int fd;
struct list link;
};
struct libinput_event {
enum libinput_event_type type;
struct libinput_device *device;
};
struct libinput_event_device_notify {
struct libinput_event base;
};
struct libinput_event_keyboard {
struct libinput_event base;
uint32_t time;
uint32_t key;
enum libinput_keyboard_key_state state;
};
struct libinput_event_pointer {
struct libinput_event base;
uint32_t time;
li_fixed_t x;
li_fixed_t y;
uint32_t button;
enum libinput_pointer_button_state state;
enum libinput_pointer_axis axis;
li_fixed_t value;
};
struct libinput_event_touch {
struct libinput_event base;
uint32_t time;
uint32_t slot;
li_fixed_t x;
li_fixed_t y;
enum libinput_touch_type touch_type;
};
static void
libinput_post_event(struct libinput *libinput,
struct libinput_event *event);
LIBINPUT_EXPORT enum libinput_event_type
libinput_event_get_type(struct libinput_event *event)
{
return event->type;
}
LIBINPUT_EXPORT struct libinput *
libinput_event_get_context(struct libinput_event *event)
{
return event->device->seat->libinput;
}
LIBINPUT_EXPORT struct libinput_device *
libinput_event_get_device(struct libinput_event *event)
{
return event->device;
}
LIBINPUT_EXPORT struct libinput_event_pointer *
libinput_event_get_pointer_event(struct libinput_event *event)
{
switch (event->type) {
case LIBINPUT_EVENT_NONE:
abort(); /* not used as actual event type */
case LIBINPUT_EVENT_DEVICE_ADDED:
case LIBINPUT_EVENT_DEVICE_REMOVED:
case LIBINPUT_EVENT_KEYBOARD_KEY:
break;
case LIBINPUT_EVENT_POINTER_MOTION:
case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
case LIBINPUT_EVENT_POINTER_BUTTON:
case LIBINPUT_EVENT_POINTER_AXIS:
return (struct libinput_event_pointer *) event;
case LIBINPUT_EVENT_TOUCH_TOUCH:
case LIBINPUT_EVENT_TOUCH_FRAME:
break;
}
return NULL;
}
LIBINPUT_EXPORT struct libinput_event_keyboard *
libinput_event_get_keyboard_event(struct libinput_event *event)
{
switch (event->type) {
case LIBINPUT_EVENT_NONE:
abort(); /* not used as actual event type */
case LIBINPUT_EVENT_DEVICE_ADDED:
case LIBINPUT_EVENT_DEVICE_REMOVED:
break;
case LIBINPUT_EVENT_KEYBOARD_KEY:
return (struct libinput_event_keyboard *) event;
case LIBINPUT_EVENT_POINTER_MOTION:
case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
case LIBINPUT_EVENT_POINTER_BUTTON:
case LIBINPUT_EVENT_POINTER_AXIS:
case LIBINPUT_EVENT_TOUCH_TOUCH:
case LIBINPUT_EVENT_TOUCH_FRAME:
break;
}
return NULL;
}
LIBINPUT_EXPORT struct libinput_event_touch *
libinput_event_get_touch_event(struct libinput_event *event)
{
switch (event->type) {
case LIBINPUT_EVENT_NONE:
abort(); /* not used as actual event type */
case LIBINPUT_EVENT_DEVICE_ADDED:
case LIBINPUT_EVENT_DEVICE_REMOVED:
case LIBINPUT_EVENT_KEYBOARD_KEY:
case LIBINPUT_EVENT_POINTER_MOTION:
case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
case LIBINPUT_EVENT_POINTER_BUTTON:
case LIBINPUT_EVENT_POINTER_AXIS:
break;
case LIBINPUT_EVENT_TOUCH_TOUCH:
case LIBINPUT_EVENT_TOUCH_FRAME:
return (struct libinput_event_touch *) event;
}
return NULL;
}
LIBINPUT_EXPORT struct libinput_event_device_notify *
libinput_event_get_device_notify_event(struct libinput_event *event)
{
switch (event->type) {
case LIBINPUT_EVENT_NONE:
abort(); /* not used as actual event type */
case LIBINPUT_EVENT_DEVICE_ADDED:
case LIBINPUT_EVENT_DEVICE_REMOVED:
return (struct libinput_event_device_notify *) event;
case LIBINPUT_EVENT_KEYBOARD_KEY:
case LIBINPUT_EVENT_POINTER_MOTION:
case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
case LIBINPUT_EVENT_POINTER_BUTTON:
case LIBINPUT_EVENT_POINTER_AXIS:
case LIBINPUT_EVENT_TOUCH_TOUCH:
case LIBINPUT_EVENT_TOUCH_FRAME:
break;
}
return NULL;
}
LIBINPUT_EXPORT uint32_t
libinput_event_keyboard_get_time(
struct libinput_event_keyboard *event)
{
return event->time;
}
LIBINPUT_EXPORT uint32_t
libinput_event_keyboard_get_key(
struct libinput_event_keyboard *event)
{
return event->key;
}
LIBINPUT_EXPORT enum libinput_keyboard_key_state
libinput_event_keyboard_get_key_state(
struct libinput_event_keyboard *event)
{
return event->state;
}
LIBINPUT_EXPORT uint32_t
libinput_event_pointer_get_time(
struct libinput_event_pointer *event)
{
return event->time;
}
LIBINPUT_EXPORT li_fixed_t
libinput_event_pointer_get_dx(
struct libinput_event_pointer *event)
{
return event->x;
}
LIBINPUT_EXPORT li_fixed_t
libinput_event_pointer_get_dy(
struct libinput_event_pointer *event)
{
return event->y;
}
LIBINPUT_EXPORT li_fixed_t
libinput_event_pointer_get_absolute_x(
struct libinput_event_pointer *event)
{
return event->x;
}
LIBINPUT_EXPORT li_fixed_t
libinput_event_pointer_get_absolute_y(
struct libinput_event_pointer *event)
{
return event->y;
}
LIBINPUT_EXPORT uint32_t
libinput_event_pointer_get_button(
struct libinput_event_pointer *event)
{
return event->button;
}
LIBINPUT_EXPORT enum libinput_pointer_button_state
libinput_event_pointer_get_button_state(
struct libinput_event_pointer *event)
{
return event->state;
}
LIBINPUT_EXPORT enum libinput_pointer_axis
libinput_event_pointer_get_axis(
struct libinput_event_pointer *event)
{
return event->axis;
}
LIBINPUT_EXPORT li_fixed_t
libinput_event_pointer_get_axis_value(
struct libinput_event_pointer *event)
{
return event->value;
}
LIBINPUT_EXPORT uint32_t
libinput_event_touch_get_time(
struct libinput_event_touch *event)
{
return event->time;
}
LIBINPUT_EXPORT uint32_t
libinput_event_touch_get_slot(
struct libinput_event_touch *event)
{
return event->slot;
}
LIBINPUT_EXPORT li_fixed_t
libinput_event_touch_get_x(
struct libinput_event_touch *event)
{
return event->x;
}
LIBINPUT_EXPORT li_fixed_t
libinput_event_touch_get_y(
struct libinput_event_touch *event)
{
return event->y;
}
LIBINPUT_EXPORT enum libinput_touch_type
libinput_event_touch_get_touch_type(
struct libinput_event_touch *event)
{
return event->touch_type;
}
struct libinput_source *
libinput_add_fd(struct libinput *libinput,
int fd,
libinput_source_dispatch_t dispatch,
void *user_data)
{
struct libinput_source *source;
struct epoll_event ep;
source = malloc(sizeof *source);
if (!source)
return NULL;
source->dispatch = dispatch;
source->user_data = user_data;
source->fd = fd;
memset(&ep, 0, sizeof ep);
ep.events = EPOLLIN;
ep.data.ptr = source;
if (epoll_ctl(libinput->epoll_fd, EPOLL_CTL_ADD, fd, &ep) < 0) {
close(source->fd);
free(source);
return NULL;
}
return source;
}
void
libinput_remove_source(struct libinput *libinput,
struct libinput_source *source)
{
epoll_ctl(libinput->epoll_fd, EPOLL_CTL_DEL, source->fd, NULL);
close(source->fd);
source->fd = -1;
list_insert(&libinput->source_destroy_list, &source->link);
}
int
libinput_init(struct libinput *libinput,
const struct libinput_interface *interface,
const struct libinput_interface_backend *interface_backend,
void *user_data)
{
libinput->epoll_fd = epoll_create1(EPOLL_CLOEXEC);;
if (libinput->epoll_fd < 0)
return -1;
libinput->events_len = 4;
libinput->events = zalloc(libinput->events_len * sizeof(*libinput->events));
if (!libinput->events) {
close(libinput->epoll_fd);
return -1;
}
libinput->interface = interface;
libinput->interface_backend = interface_backend;
libinput->user_data = user_data;
list_init(&libinput->source_destroy_list);
list_init(&libinput->seat_list);
return 0;
}
static void
libinput_device_destroy(struct libinput_device *device);
static void
libinput_seat_destroy(struct libinput_seat *seat);
static void
libinput_drop_destroyed_sources(struct libinput *libinput)
{
struct libinput_source *source, *next;
list_for_each_safe(source, next, &libinput->source_destroy_list, link)
free(source);
list_init(&libinput->source_destroy_list);
}
LIBINPUT_EXPORT void
libinput_destroy(struct libinput *libinput)
{
struct libinput_event *event;
struct libinput_device *device, *next_device;
struct libinput_seat *seat, *next_seat;
if (libinput == NULL)
return;
libinput_suspend(libinput);
libinput->interface_backend->destroy(libinput);
while ((event = libinput_get_event(libinput)))
libinput_event_destroy(event);
libinput_drop_destroyed_sources(libinput);
free(libinput->events);
list_for_each_safe(seat, next_seat, &libinput->seat_list, link) {
list_for_each_safe(device, next_device,
&seat->devices_list,
link)
libinput_device_destroy(device);
libinput_seat_destroy(seat);
}
close(libinput->epoll_fd);
free(libinput);
}
LIBINPUT_EXPORT void
libinput_event_destroy(struct libinput_event *event)
{
if (event == NULL)
return;
if (event->device)
libinput_device_unref(event->device);
free(event);
}
int
open_restricted(struct libinput *libinput,
const char *path, int flags)
{
return libinput->interface->open_restricted(path,
flags,
libinput->user_data);
}
void
close_restricted(struct libinput *libinput, int fd)
{
return libinput->interface->close_restricted(fd, libinput->user_data);
}
void
libinput_seat_init(struct libinput_seat *seat,
struct libinput *libinput,
const char *physical_name,
const char *logical_name,
libinput_seat_destroy_func destroy)
{
seat->refcount = 1;
seat->libinput = libinput;
seat->physical_name = strdup(physical_name);
seat->logical_name = strdup(logical_name);
seat->destroy = destroy;
list_init(&seat->devices_list);
}
LIBINPUT_EXPORT void
libinput_seat_ref(struct libinput_seat *seat)
{
seat->refcount++;
}
static void
libinput_seat_destroy(struct libinput_seat *seat)
{
list_remove(&seat->link);
free(seat->logical_name);
free(seat->physical_name);
seat->destroy(seat);
}
LIBINPUT_EXPORT void
libinput_seat_unref(struct libinput_seat *seat)
{
assert(seat->refcount > 0);
seat->refcount--;
if (seat->refcount == 0)
libinput_seat_destroy(seat);
}
LIBINPUT_EXPORT void
libinput_seat_set_user_data(struct libinput_seat *seat, void *user_data)
{
seat->user_data = user_data;
}
LIBINPUT_EXPORT void *
libinput_seat_get_user_data(struct libinput_seat *seat)
{
return seat->user_data;
}
LIBINPUT_EXPORT const char *
libinput_seat_get_physical_name(struct libinput_seat *seat)
{
return seat->physical_name;
}
LIBINPUT_EXPORT const char *
libinput_seat_get_logical_name(struct libinput_seat *seat)
{
return seat->logical_name;
}
void
libinput_device_init(struct libinput_device *device,
struct libinput_seat *seat)
{
device->seat = seat;
device->refcount = 1;
}
LIBINPUT_EXPORT void
libinput_device_ref(struct libinput_device *device)
{
device->refcount++;
}
static void
libinput_device_destroy(struct libinput_device *device)
{
evdev_device_destroy((struct evdev_device *) device);
}
LIBINPUT_EXPORT void
libinput_device_unref(struct libinput_device *device)
{
assert(device->refcount > 0);
device->refcount--;
if (device->refcount == 0)
libinput_device_destroy(device);
}
LIBINPUT_EXPORT int
libinput_get_fd(struct libinput *libinput)
{
return libinput->epoll_fd;
}
LIBINPUT_EXPORT int
libinput_dispatch(struct libinput *libinput)
{
struct libinput_source *source;
struct epoll_event ep[32];
int i, count;
count = epoll_wait(libinput->epoll_fd, ep, ARRAY_LENGTH(ep), 0);
if (count < 0)
return -errno;
for (i = 0; i < count; ++i) {
source = ep[i].data.ptr;
if (source->fd == -1)
continue;
source->dispatch(source->user_data);
}
libinput_drop_destroyed_sources(libinput);
return 0;
}
static void
init_event_base(struct libinput_event *event,
struct libinput_device *device,
enum libinput_event_type type)
{
event->type = type;
event->device = device;
}
static void
post_base_event(struct libinput_device *device,
enum libinput_event_type type,
struct libinput_event *event)
{
struct libinput *libinput = device->seat->libinput;
init_event_base(event, device, type);
libinput_post_event(libinput, event);
}
static void
post_device_event(struct libinput_device *device,
enum libinput_event_type type,
struct libinput_event *event)
{
init_event_base(event, device, type);
libinput_post_event(device->seat->libinput, event);
}
void
notify_added_device(struct libinput_device *device)
{
struct libinput_event_device_notify *added_device_event;
added_device_event = zalloc(sizeof *added_device_event);
if (!added_device_event)
return;
post_base_event(device,
LIBINPUT_EVENT_DEVICE_ADDED,
&added_device_event->base);
}
void
notify_removed_device(struct libinput_device *device)
{
struct libinput_event_device_notify *removed_device_event;
removed_device_event = zalloc(sizeof *removed_device_event);
if (!removed_device_event)
return;
post_base_event(device,
LIBINPUT_EVENT_DEVICE_REMOVED,
&removed_device_event->base);
}
void
keyboard_notify_key(struct libinput_device *device,
uint32_t time,
uint32_t key,
enum libinput_keyboard_key_state state)
{
struct libinput_event_keyboard *key_event;
key_event = zalloc(sizeof *key_event);
if (!key_event)
return;
*key_event = (struct libinput_event_keyboard) {
.time = time,
.key = key,
.state = state,
};
post_device_event(device,
LIBINPUT_EVENT_KEYBOARD_KEY,
&key_event->base);
}
void
pointer_notify_motion(struct libinput_device *device,
uint32_t time,
li_fixed_t dx,
li_fixed_t dy)
{
struct libinput_event_pointer *motion_event;
motion_event = zalloc(sizeof *motion_event);
if (!motion_event)
return;
*motion_event = (struct libinput_event_pointer) {
.time = time,
.x = dx,
.y = dy,
};
post_device_event(device,
LIBINPUT_EVENT_POINTER_MOTION,
&motion_event->base);
}
void
pointer_notify_motion_absolute(struct libinput_device *device,
uint32_t time,
li_fixed_t x,
li_fixed_t y)
{
struct libinput_event_pointer *motion_absolute_event;
motion_absolute_event = zalloc(sizeof *motion_absolute_event);
if (!motion_absolute_event)
return;
*motion_absolute_event = (struct libinput_event_pointer) {
.time = time,
.x = x,
.y = y,
};
post_device_event(device,
LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE,
&motion_absolute_event->base);
}
void
pointer_notify_button(struct libinput_device *device,
uint32_t time,
int32_t button,
enum libinput_pointer_button_state state)
{
struct libinput_event_pointer *button_event;
button_event = zalloc(sizeof *button_event);
if (!button_event)
return;
*button_event = (struct libinput_event_pointer) {
.time = time,
.button = button,
.state = state,
};
post_device_event(device,
LIBINPUT_EVENT_POINTER_BUTTON,
&button_event->base);
}
void
pointer_notify_axis(struct libinput_device *device,
uint32_t time,
enum libinput_pointer_axis axis,
li_fixed_t value)
{
struct libinput_event_pointer *axis_event;
axis_event = zalloc(sizeof *axis_event);
if (!axis_event)
return;
*axis_event = (struct libinput_event_pointer) {
.time = time,
.axis = axis,
.value = value,
};
post_device_event(device,
LIBINPUT_EVENT_POINTER_AXIS,
&axis_event->base);
}
void
touch_notify_touch(struct libinput_device *device,
uint32_t time,
int32_t slot,
li_fixed_t x,
li_fixed_t y,
enum libinput_touch_type touch_type)
{
struct libinput_event_touch *touch_event;
touch_event = zalloc(sizeof *touch_event);
if (!touch_event)
return;
*touch_event = (struct libinput_event_touch) {
.time = time,
.slot = slot,
.x = x,
.y = y,
.touch_type = touch_type,
};
post_device_event(device,
LIBINPUT_EVENT_TOUCH_TOUCH,
&touch_event->base);
}
void
touch_notify_frame(struct libinput_device *device,
uint32_t time)
{
struct libinput_event_touch *touch_event;
touch_event = zalloc(sizeof *touch_event);
if (!touch_event)
return;
*touch_event = (struct libinput_event_touch) {
.time = time,
};
post_device_event(device,
LIBINPUT_EVENT_TOUCH_FRAME,
&touch_event->base);
}
static void
libinput_post_event(struct libinput *libinput,
struct libinput_event *event)
{
struct libinput_event **events = libinput->events;
size_t events_len = libinput->events_len;
size_t events_count = libinput->events_count;
size_t move_len;
size_t new_out;
events_count++;
if (events_count > events_len) {
events_len *= 2;
events = realloc(events, events_len * sizeof *events);
if (!events) {
fprintf(stderr, "Failed to reallocate event ring "
"buffer");
return;
}
if (libinput->events_count > 0 && libinput->events_in == 0) {
libinput->events_in = libinput->events_len;
} else if (libinput->events_count > 0 &&
libinput->events_out >= libinput->events_in) {
move_len = libinput->events_len - libinput->events_out;
new_out = events_len - move_len;
memmove(events + new_out,
events + libinput->events_out,
move_len * sizeof *events);
libinput->events_out = new_out;
}
libinput->events = events;
libinput->events_len = events_len;
}
if (event->device)
libinput_device_ref(event->device);
libinput->events_count = events_count;
events[libinput->events_in] = event;
libinput->events_in = (libinput->events_in + 1) % libinput->events_len;
}
LIBINPUT_EXPORT struct libinput_event *
libinput_get_event(struct libinput *libinput)
{
struct libinput_event *event;
if (libinput->events_count == 0)
return NULL;
event = libinput->events[libinput->events_out];
libinput->events_out =
(libinput->events_out + 1) % libinput->events_len;
libinput->events_count--;
return event;
}
LIBINPUT_EXPORT enum libinput_event_type
libinput_next_event_type(struct libinput *libinput)
{
struct libinput_event *event;
if (libinput->events_count == 0)
return LIBINPUT_EVENT_NONE;
event = libinput->events[libinput->events_out];
return event->type;
}
LIBINPUT_EXPORT void *
libinput_get_user_data(struct libinput *libinput)
{
return libinput->user_data;
}
LIBINPUT_EXPORT int
libinput_resume(struct libinput *libinput)
{
return libinput->interface_backend->resume(libinput);
}
LIBINPUT_EXPORT void
libinput_suspend(struct libinput *libinput)
{
libinput->interface_backend->suspend(libinput);
}
LIBINPUT_EXPORT void
libinput_device_set_user_data(struct libinput_device *device, void *user_data)
{
device->user_data = user_data;
}
LIBINPUT_EXPORT void *
libinput_device_get_user_data(struct libinput_device *device)
{
return device->user_data;
}
LIBINPUT_EXPORT const char *
libinput_device_get_sysname(struct libinput_device *device)
{
return evdev_device_get_sysname((struct evdev_device *) device);
}
LIBINPUT_EXPORT const char *
libinput_device_get_output_name(struct libinput_device *device)
{
return evdev_device_get_output((struct evdev_device *) device);
}
LIBINPUT_EXPORT struct libinput_seat *
libinput_device_get_seat(struct libinput_device *device)
{
return device->seat;
}
LIBINPUT_EXPORT void
libinput_device_led_update(struct libinput_device *device,
enum libinput_led leds)
{
evdev_device_led_update((struct evdev_device *) device, leds);
}
LIBINPUT_EXPORT int
libinput_device_get_keys(struct libinput_device *device,
char *keys, size_t size)
{
return evdev_device_get_keys((struct evdev_device *) device,
keys,
size);
}
LIBINPUT_EXPORT void
libinput_device_calibrate(struct libinput_device *device,
float calibration[6])
{
evdev_device_calibrate((struct evdev_device *) device, calibration);
}
LIBINPUT_EXPORT int
libinput_device_has_capability(struct libinput_device *device,
enum libinput_device_capability capability)
{
return evdev_device_has_capability((struct evdev_device *) device,
capability);
}