weston/libweston/libinput-seat.c

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/*
* Copyright © 2013 Intel Corporation
* Copyright © 2013 Jonas Ådahl
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "config.h"
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <libinput.h>
#include <libudev.h>
#include <libweston/libweston.h>
#include "backend.h"
#include "libweston-internal.h"
#include "weston-log-internal.h"
#include "launcher-util.h"
#include "libinput-seat.h"
#include "libinput-device.h"
#include "shared/helpers.h"
static void
process_events(struct udev_input *input);
static struct udev_seat *
udev_seat_create(struct udev_input *input, const char *seat_name);
static void
udev_seat_destroy(struct udev_seat *seat);
static struct udev_seat *
get_udev_seat(struct udev_input *input, struct libinput_device *device)
{
struct libinput_seat *libinput_seat;
const char *seat_name;
libinput_seat = libinput_device_get_seat(device);
seat_name = libinput_seat_get_logical_name(libinput_seat);
return udev_seat_get_named(input, seat_name);
}
static struct weston_output *
output_find_by_head_name(struct weston_compositor *compositor,
const char *head_name)
{
struct weston_output *output;
struct weston_head *head;
if (!head_name)
return NULL;
/* Only enabled outputs with connected heads.
* This means force-enabled outputs but with disconnected heads
* will be ignored; if the touchscreen doesn't have a video signal,
* touching it is meaningless.
*/
wl_list_for_each(output, &compositor->output_list, link) {
wl_list_for_each(head, &output->head_list, output_link) {
if (!weston_head_is_connected(head))
continue;
if (strcmp(head_name, head->name) == 0)
return output;
}
}
return NULL;
}
static int
device_added(struct udev_input *input, struct libinput_device *libinput_device)
{
struct weston_compositor *c;
struct evdev_device *device;
struct weston_output *output;
const char *output_name;
struct weston_seat *seat;
struct udev_seat *udev_seat;
struct weston_pointer *pointer;
c = input->compositor;
udev_seat = get_udev_seat(input, libinput_device);
if (!udev_seat) {
weston_log("Failed to get a seat\n");
return 1;
}
seat = &udev_seat->base;
device = evdev_device_create(libinput_device, seat);
if (device == NULL) {
weston_log("Failed to create a device\n");
return 1;
}
if (input->configure_device != NULL)
input->configure_device(c, device->device);
evdev_device_set_calibration(device);
udev_seat = (struct udev_seat *) seat;
wl_list_insert(udev_seat->devices_list.prev, &device->link);
pointer = weston_seat_get_pointer(seat);
if (seat->output && pointer)
weston_pointer_clamp(pointer,
&pointer->x,
&pointer->y);
output_name = libinput_device_get_output_name(libinput_device);
if (output_name) {
device->output_name = strdup(output_name);
output = output_find_by_head_name(c, output_name);
evdev_device_set_output(device, output);
} else if (!wl_list_empty(&c->output_list)) {
/* default assignment to an arbitrary output */
output = container_of(c->output_list.next,
struct weston_output, link);
evdev_device_set_output(device, output);
}
if (!input->suspended) {
weston_seat_repick(seat);
/* Sync device leds with the actual state */
if (seat->led_update && seat->keyboard_state)
seat->led_update(seat, seat->keyboard_state->xkb_state.leds);
}
return 0;
}
static int
device_removed(struct udev_input *input, struct libinput_device *libinput_device)
{
struct evdev_device *device;
device = libinput_device_get_user_data(libinput_device);
if (!device) {
weston_log("Failed to retrieve device\n");
return 1;
}
evdev_device_destroy(device);
return 0;
}
static void
udev_seat_remove_devices(struct udev_seat *seat)
{
struct evdev_device *device, *next;
wl_list_for_each_safe(device, next, &seat->devices_list, link) {
evdev_device_destroy(device);
}
}
void
udev_input_disable(struct udev_input *input)
{
if (input->suspended)
return;
wl_event_source_remove(input->libinput_source);
input->libinput_source = NULL;
libinput_suspend(input->libinput);
process_events(input);
input->suspended = 1;
}
static int
udev_input_process_event(struct libinput_event *event)
{
struct libinput *libinput = libinput_event_get_context(event);
struct libinput_device *libinput_device =
libinput_event_get_device(event);
struct udev_input *input = libinput_get_user_data(libinput);
int ret = 0;
switch (libinput_event_get_type(event)) {
case LIBINPUT_EVENT_DEVICE_ADDED:
ret = device_added(input, libinput_device);
break;
case LIBINPUT_EVENT_DEVICE_REMOVED:
ret = device_removed(input, libinput_device);
break;
default:
evdev_device_process_event(event);
break;
}
return ret;
}
static void
process_event(struct libinput_event *event)
{
if (udev_input_process_event(event))
exit(EXIT_FAILURE);
}
static void
process_events(struct udev_input *input)
{
struct libinput_event *event;
while ((event = libinput_get_event(input->libinput))) {
process_event(event);
libinput_event_destroy(event);
}
}
static int
udev_input_dispatch(struct udev_input *input)
{
if (libinput_dispatch(input->libinput) != 0)
weston_log("libinput: Failed to dispatch libinput\n");
process_events(input);
return 0;
}
static int
libinput_source_dispatch(int fd, uint32_t mask, void *data)
{
struct udev_input *input = data;
return udev_input_dispatch(input) != 0;
}
static int
open_restricted(const char *path, int flags, void *user_data)
{
struct udev_input *input = user_data;
struct weston_launcher *launcher = input->compositor->launcher;
return weston_launcher_open(launcher, path, flags);
}
static void
close_restricted(int fd, void *user_data)
{
struct udev_input *input = user_data;
struct weston_launcher *launcher = input->compositor->launcher;
weston_launcher_close(launcher, fd);
}
const struct libinput_interface libinput_interface = {
open_restricted,
close_restricted,
};
int
udev_input_enable(struct udev_input *input)
{
struct wl_event_loop *loop;
struct weston_compositor *c = input->compositor;
int fd;
struct udev_seat *seat;
int devices_found = 0;
loop = wl_display_get_event_loop(c->wl_display);
fd = libinput_get_fd(input->libinput);
input->libinput_source =
wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
libinput_source_dispatch, input);
if (!input->libinput_source) {
return -1;
}
if (input->suspended) {
if (libinput_resume(input->libinput) != 0) {
wl_event_source_remove(input->libinput_source);
input->libinput_source = NULL;
return -1;
}
input->suspended = 0;
process_events(input);
}
wl_list_for_each(seat, &input->compositor->seat_list, base.link) {
evdev_notify_keyboard_focus(&seat->base, &seat->devices_list);
if (!wl_list_empty(&seat->devices_list))
devices_found = 1;
}
if (devices_found == 0 && !c->require_input) {
weston_log("warning: no input devices found, but none required "
"as per configuration.\n");
return 0;
}
if (devices_found == 0) {
weston_log(
"warning: no input devices on entering Weston. "
"Possible causes:\n"
"\t- no permissions to read /dev/input/event*\n"
"\t- seats misconfigured "
"(Weston backend option 'seat', "
"udev device property ID_SEAT)\n");
return -1;
}
return 0;
}
static void
libinput_log_func(struct libinput *libinput,
enum libinput_log_priority priority,
const char *format, va_list args)
{
weston_vlog(format, args);
}
int
udev_input_init(struct udev_input *input, struct weston_compositor *c,
struct udev *udev, const char *seat_id,
udev_configure_device_t configure_device)
{
enum libinput_log_priority priority = LIBINPUT_LOG_PRIORITY_INFO;
const char *log_priority = NULL;
memset(input, 0, sizeof *input);
input->compositor = c;
input->configure_device = configure_device;
log_priority = getenv("WESTON_LIBINPUT_LOG_PRIORITY");
input->libinput = libinput_udev_create_context(&libinput_interface,
input, udev);
if (!input->libinput) {
return -1;
}
libinput_log_set_handler(input->libinput, &libinput_log_func);
if (log_priority) {
if (strcmp(log_priority, "debug") == 0) {
priority = LIBINPUT_LOG_PRIORITY_DEBUG;
} else if (strcmp(log_priority, "info") == 0) {
priority = LIBINPUT_LOG_PRIORITY_INFO;
} else if (strcmp(log_priority, "error") == 0) {
priority = LIBINPUT_LOG_PRIORITY_ERROR;
}
}
libinput_log_set_priority(input->libinput, priority);
if (libinput_udev_assign_seat(input->libinput, seat_id) != 0) {
libinput_unref(input->libinput);
return -1;
}
process_events(input);
return udev_input_enable(input);
}
void
udev_input_destroy(struct udev_input *input)
{
struct udev_seat *seat, *next;
if (input->libinput_source)
wl_event_source_remove(input->libinput_source);
wl_list_for_each_safe(seat, next, &input->compositor->seat_list, base.link)
udev_seat_destroy(seat);
libinput_unref(input->libinput);
}
static void
udev_seat_led_update(struct weston_seat *seat_base, enum weston_led leds)
{
struct udev_seat *seat = (struct udev_seat *) seat_base;
struct evdev_device *device;
wl_list_for_each(device, &seat->devices_list, link)
evdev_led_update(device, leds);
}
static void
udev_seat_output_changed(struct udev_seat *seat, struct weston_output *output)
{
struct evdev_device *device;
struct weston_output *found;
wl_list_for_each(device, &seat->devices_list, link) {
/* If we find any input device without an associated output
* or an output name to associate with, just tie it with the
* output we got here - the default assignment.
*/
if (!device->output_name) {
if (!device->output)
evdev_device_set_output(device, output);
continue;
}
/* Update all devices' output associations, may they gain or
* lose it.
*/
found = output_find_by_head_name(output->compositor,
device->output_name);
evdev_device_set_output(device, found);
}
}
static void
notify_output_create(struct wl_listener *listener, void *data)
{
struct udev_seat *seat = container_of(listener, struct udev_seat,
output_create_listener);
struct weston_output *output = data;
udev_seat_output_changed(seat, output);
}
static void
notify_output_heads_changed(struct wl_listener *listener, void *data)
{
struct udev_seat *seat = container_of(listener, struct udev_seat,
output_heads_listener);
struct weston_output *output = data;
udev_seat_output_changed(seat, output);
}
static struct udev_seat *
udev_seat_create(struct udev_input *input, const char *seat_name)
{
struct weston_compositor *c = input->compositor;
struct udev_seat *seat;
seat = zalloc(sizeof *seat);
if (!seat)
return NULL;
weston_seat_init(&seat->base, c, seat_name);
seat->base.led_update = udev_seat_led_update;
seat->output_create_listener.notify = notify_output_create;
wl_signal_add(&c->output_created_signal,
&seat->output_create_listener);
seat->output_heads_listener.notify = notify_output_heads_changed;
wl_signal_add(&c->output_heads_changed_signal,
&seat->output_heads_listener);
wl_list_init(&seat->devices_list);
return seat;
}
static void
udev_seat_destroy(struct udev_seat *seat)
{
struct weston_keyboard *keyboard =
weston_seat_get_keyboard(&seat->base);
if (keyboard)
notify_keyboard_focus_out(&seat->base);
udev_seat_remove_devices(seat);
weston_seat_release(&seat->base);
wl_list_remove(&seat->output_create_listener.link);
wl_list_remove(&seat->output_heads_listener.link);
free(seat);
}
struct udev_seat *
udev_seat_get_named(struct udev_input *input, const char *seat_name)
{
struct udev_seat *seat;
wl_list_for_each(seat, &input->compositor->seat_list, base.link) {
if (strcmp(seat->base.seat_name, seat_name) == 0)
return seat;
}
return udev_seat_create(input, seat_name);
}