fdo-mirrors/libinput
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/libinput/libinput.git synced 2025-12-20 16:10:06 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions
libinput/tools/event-debug.c
Hans de Goede b8a2e5bc5f touchpad: Add an API for touchpad gesture events 
For touchscreens we always send raw touch events to the compositor, and the
compositor or application toolkits do gesture recognition. This makes sense
because on a touchscreen which window / widget the touches are over is
important context to know to interpret gestures.

On touchpads however we never send raw events since a touchpad is an absolute
device which primary function is to send pointer motion delta-s, so we always
need to do processing (and a lot of it) on the raw events.

Moreover there is nothing underneath the finger which influences how to
interpret gestures, and there is a lot of touchpad and libinput configuration
specific context necessary for gesture recognition. E.g. is this a clickpad,
and if so are softbuttons or clickfinger used? What is the size of the
softbuttons? Is this a true multi-touch touchpad or a semi multi-touch touchpad
which only gives us a bounding box enclosing the fingers? Etc.

So for touchpads it is better to do gesture processing in libinput, this commit
adds an initial implementation of a Gesture event API which only supports swipe
gestures, other gestures will be added later following the same model wrt,
having clear start and stop events and the number of fingers involved being
fixed once a gesture sequence starts.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Jason Gerecke <jason.gerecke@wacom.com>
2015-07-06 14:08:54 +10:00

446 lines
12 KiB
C
Raw Blame History

/*
* Copyright © 2014 Red Hat, Inc.
*
* 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.
*/
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <stdio.h>
#include <signal.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <libudev.h>
#include "linux/input.h"
#include <sys/ioctl.h>
#include <libinput.h>
#include <libevdev/libevdev.h>
#include "shared.h"
uint32_t start_time;
static const uint32_t screen_width = 100;
static const uint32_t screen_height = 100;
struct tools_context context;
static unsigned int stop = 0;
static void
print_event_header(struct libinput_event *ev)
{
struct libinput_device *dev = libinput_event_get_device(ev);
const char *type = NULL;
switch(libinput_event_get_type(ev)) {
case LIBINPUT_EVENT_NONE:
abort();
case LIBINPUT_EVENT_DEVICE_ADDED:
type = "DEVICE_ADDED";
break;
case LIBINPUT_EVENT_DEVICE_REMOVED:
type = "DEVICE_REMOVED";
break;
case LIBINPUT_EVENT_KEYBOARD_KEY:
type = "KEYBOARD_KEY";
break;
case LIBINPUT_EVENT_POINTER_MOTION:
type = "POINTER_MOTION";
break;
case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
type = "POINTER_MOTION_ABSOLUTE";
break;
case LIBINPUT_EVENT_POINTER_BUTTON:
type = "POINTER_BUTTON";
break;
case LIBINPUT_EVENT_POINTER_AXIS:
type = "POINTER_AXIS";
break;
case LIBINPUT_EVENT_TOUCH_DOWN:
type = "TOUCH_DOWN";
break;
case LIBINPUT_EVENT_TOUCH_MOTION:
type = "TOUCH_MOTION";
break;
case LIBINPUT_EVENT_TOUCH_UP:
type = "TOUCH_UP";
break;
case LIBINPUT_EVENT_TOUCH_CANCEL:
type = "TOUCH_CANCEL";
break;
case LIBINPUT_EVENT_TOUCH_FRAME:
type = "TOUCH_FRAME";
break;
case LIBINPUT_EVENT_GESTURE_SWIPE_BEGIN:
type = "GESTURE_SWIPE_BEGIN";
break;
case LIBINPUT_EVENT_GESTURE_SWIPE_UPDATE:
type = "GESTURE_SWIPE_UPDATE";
break;
case LIBINPUT_EVENT_GESTURE_SWIPE_END:
type = "GESTURE_SWIPE_END";
break;
}
printf("%-7s %s ", libinput_device_get_sysname(dev), type);
}
static void
print_event_time(uint32_t time)
{
printf("%+6.2fs ", (time - start_time) / 1000.0);
}
static void
print_device_notify(struct libinput_event *ev)
{
struct libinput_device *dev = libinput_event_get_device(ev);
struct libinput_seat *seat = libinput_device_get_seat(dev);
struct libinput_device_group *group;
double w, h;
uint32_t scroll_methods, click_methods;
static int next_group_id = 0;
intptr_t group_id;
group = libinput_device_get_device_group(dev);
group_id = (intptr_t)libinput_device_group_get_user_data(group);
if (!group_id) {
group_id = ++next_group_id;
libinput_device_group_set_user_data(group, (void*)group_id);
}
printf("%-33s %5s %7s group%d",
libinput_device_get_name(dev),
libinput_seat_get_physical_name(seat),
libinput_seat_get_logical_name(seat),
(int)group_id);
printf(" cap:");
if (libinput_device_has_capability(dev,
LIBINPUT_DEVICE_CAP_KEYBOARD))
printf("k");
if (libinput_device_has_capability(dev,
LIBINPUT_DEVICE_CAP_POINTER))
printf("p");
if (libinput_device_has_capability(dev,
LIBINPUT_DEVICE_CAP_TOUCH))
printf("t");
if (libinput_device_has_capability(dev,
LIBINPUT_DEVICE_CAP_GESTURE))
printf("g");
if (libinput_device_get_size(dev, &w, &h) == 0)
printf("\tsize %.2f/%.2fmm", w, h);
if (libinput_device_config_tap_get_finger_count(dev)) {
printf(" tap");
if (libinput_device_config_tap_get_drag_lock_enabled(dev))
printf("(dl on)");
else
printf("(dl off)");
}
if (libinput_device_config_left_handed_is_available(dev))
printf(" left");
if (libinput_device_config_scroll_has_natural_scroll(dev))
printf(" scroll-nat");
if (libinput_device_config_calibration_has_matrix(dev))
printf(" calib");
scroll_methods = libinput_device_config_scroll_get_methods(dev);
if (scroll_methods != LIBINPUT_CONFIG_SCROLL_NO_SCROLL) {
printf(" scroll");
if (scroll_methods & LIBINPUT_CONFIG_SCROLL_2FG)
printf("-2fg");
if (scroll_methods & LIBINPUT_CONFIG_SCROLL_EDGE)
printf("-edge");
if (scroll_methods & LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN)
printf("-button");
}
click_methods = libinput_device_config_click_get_methods(dev);
if (click_methods != LIBINPUT_CONFIG_CLICK_METHOD_NONE) {
printf(" click");
if (click_methods & LIBINPUT_CONFIG_CLICK_METHOD_BUTTON_AREAS)
printf("-buttonareas");
if (click_methods & LIBINPUT_CONFIG_CLICK_METHOD_CLICKFINGER)
printf("-clickfinger");
}
printf("\n");
}
static void
print_key_event(struct libinput_event *ev)
{
struct libinput_event_keyboard *k = libinput_event_get_keyboard_event(ev);
enum libinput_key_state state;
uint32_t key;
const char *keyname;
print_event_time(libinput_event_keyboard_get_time(k));
state = libinput_event_keyboard_get_key_state(k);
key = libinput_event_keyboard_get_key(k);
keyname = libevdev_event_code_get_name(EV_KEY, key);
printf("%s (%d) %s\n",
keyname ? keyname : "???",
key,
state == LIBINPUT_KEY_STATE_PRESSED ? "pressed" : "released");
}
static void
print_motion_event(struct libinput_event *ev)
{
struct libinput_event_pointer *p = libinput_event_get_pointer_event(ev);
double x = libinput_event_pointer_get_dx(p);
double y = libinput_event_pointer_get_dy(p);
print_event_time(libinput_event_pointer_get_time(p));
printf("%6.2f/%6.2f\n", x, y);
}
static void
print_absmotion_event(struct libinput_event *ev)
{
struct libinput_event_pointer *p = libinput_event_get_pointer_event(ev);
double x = libinput_event_pointer_get_absolute_x_transformed(
p, screen_width);
double y = libinput_event_pointer_get_absolute_y_transformed(
p, screen_height);
print_event_time(libinput_event_pointer_get_time(p));
printf("%6.2f/%6.2f\n", x, y);
}
static void
print_button_event(struct libinput_event *ev)
{
struct libinput_event_pointer *p = libinput_event_get_pointer_event(ev);
enum libinput_button_state state;
print_event_time(libinput_event_pointer_get_time(p));
state = libinput_event_pointer_get_button_state(p);
printf("%3d %s, seat count: %u\n",
libinput_event_pointer_get_button(p),
state == LIBINPUT_BUTTON_STATE_PRESSED ? "pressed" : "released",
libinput_event_pointer_get_seat_button_count(p));
}
static void
print_axis_event(struct libinput_event *ev)
{
struct libinput_event_pointer *p = libinput_event_get_pointer_event(ev);
double v = 0, h = 0;
if (libinput_event_pointer_has_axis(p,
LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL))
v = libinput_event_pointer_get_axis_value(p,
LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL);
if (libinput_event_pointer_has_axis(p,
LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL))
h = libinput_event_pointer_get_axis_value(p,
LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL);
print_event_time(libinput_event_pointer_get_time(p));
printf("vert %.2f horiz %.2f\n", v, h);
}
static void
print_touch_event_without_coords(struct libinput_event *ev)
{
struct libinput_event_touch *t = libinput_event_get_touch_event(ev);
print_event_time(libinput_event_touch_get_time(t));
printf("\n");
}
static void
print_touch_event_with_coords(struct libinput_event *ev)
{
struct libinput_event_touch *t = libinput_event_get_touch_event(ev);
double x = libinput_event_touch_get_x_transformed(t, screen_width);
double y = libinput_event_touch_get_y_transformed(t, screen_height);
double xmm = libinput_event_touch_get_x(t);
double ymm = libinput_event_touch_get_y(t);
print_event_time(libinput_event_touch_get_time(t));
printf("%d (%d) %5.2f/%5.2f (%5.2f/%5.2fmm)\n",
libinput_event_touch_get_slot(t),
libinput_event_touch_get_seat_slot(t),
x, y,
xmm, ymm);
}
static void
print_gesture_event_without_coords(struct libinput_event *ev)
{
struct libinput_event_gesture *t = libinput_event_get_gesture_event(ev);
print_event_time(libinput_event_gesture_get_time(t));
printf("%d\n", libinput_event_gesture_get_finger_count(t));
}
static void
print_gesture_event_with_coords(struct libinput_event *ev)
{
struct libinput_event_gesture *t = libinput_event_get_gesture_event(ev);
double dx = libinput_event_gesture_get_dx(t);
double dy = libinput_event_gesture_get_dy(t);
double dx_unaccel = libinput_event_gesture_get_dx_unaccelerated(t);
double dy_unaccel = libinput_event_gesture_get_dy_unaccelerated(t);
print_event_time(libinput_event_gesture_get_time(t));
printf("%d %5.2f/%5.2f (%5.2f/%5.2f unaccelerated)\n",
libinput_event_gesture_get_finger_count(t),
dx, dy, dx_unaccel, dy_unaccel);
}
static int
handle_and_print_events(struct libinput *li)
{
int rc = -1;
struct libinput_event *ev;
libinput_dispatch(li);
while ((ev = libinput_get_event(li))) {
print_event_header(ev);
switch (libinput_event_get_type(ev)) {
case LIBINPUT_EVENT_NONE:
abort();
case LIBINPUT_EVENT_DEVICE_ADDED:
case LIBINPUT_EVENT_DEVICE_REMOVED:
print_device_notify(ev);
tools_device_apply_config(libinput_event_get_device(ev),
&context.options);
break;
case LIBINPUT_EVENT_KEYBOARD_KEY:
print_key_event(ev);
break;
case LIBINPUT_EVENT_POINTER_MOTION:
print_motion_event(ev);
break;
case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
print_absmotion_event(ev);
break;
case LIBINPUT_EVENT_POINTER_BUTTON:
print_button_event(ev);
break;
case LIBINPUT_EVENT_POINTER_AXIS:
print_axis_event(ev);
break;
case LIBINPUT_EVENT_TOUCH_DOWN:
print_touch_event_with_coords(ev);
break;
case LIBINPUT_EVENT_TOUCH_MOTION:
print_touch_event_with_coords(ev);
break;
case LIBINPUT_EVENT_TOUCH_UP:
print_touch_event_without_coords(ev);
break;
case LIBINPUT_EVENT_TOUCH_CANCEL:
print_touch_event_without_coords(ev);
break;
case LIBINPUT_EVENT_TOUCH_FRAME:
print_touch_event_without_coords(ev);
break;
case LIBINPUT_EVENT_GESTURE_SWIPE_BEGIN:
print_gesture_event_without_coords(ev);
break;
case LIBINPUT_EVENT_GESTURE_SWIPE_UPDATE:
print_gesture_event_with_coords(ev);
break;
case LIBINPUT_EVENT_GESTURE_SWIPE_END:
print_gesture_event_without_coords(ev);
break;
}
libinput_event_destroy(ev);
libinput_dispatch(li);
rc = 0;
}
return rc;
}
static void
sighandler(int signal, siginfo_t *siginfo, void *userdata)
{
stop = 1;
}
static void
mainloop(struct libinput *li)
{
struct pollfd fds;
struct sigaction act;
fds.fd = libinput_get_fd(li);
fds.events = POLLIN;
fds.revents = 0;
memset(&act, 0, sizeof(act));
act.sa_sigaction = sighandler;
act.sa_flags = SA_SIGINFO;
if (sigaction(SIGINT, &act, NULL) == -1) {
fprintf(stderr, "Failed to set up signal handling (%s)\n",
strerror(errno));
return;
}
/* Handle already-pending device added events */
if (handle_and_print_events(li))
fprintf(stderr, "Expected device added events on startup but got none. "
"Maybe you don't have the right permissions?\n");
while (!stop && poll(&fds, 1, -1) > -1)
handle_and_print_events(li);
}
int
main(int argc, char **argv)
{
struct libinput *li;
struct timespec tp;
tools_init_context(&context);
if (tools_parse_args(argc, argv, &context))
return 1;
li = tools_open_backend(&context);
if (!li)
return 1;
clock_gettime(CLOCK_MONOTONIC, &tp);
start_time = tp.tv_sec * 1000 + tp.tv_nsec / 1000000;
mainloop(li);
libinput_unref(li);
return 0;
}
Reference in a new issue View git blame Copy permalink