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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <inttypes.h>
#include <time.h>
#include <fcntl.h>
#include <ctype.h>
#include <errno.h>
#include <termios.h>
#include <libudev.h>
#include <libinput.h>
#include "kbd.h"
/* ---------------------------------------------------------------------- */
struct termctrl {
const char *seq;
uint32_t code;
uint32_t mod;
};
static struct termctrl termctrl[] = {
{ .seq = "a", .code = KEY_A },
{ .seq = "b", .code = KEY_B },
{ .seq = "c", .code = KEY_C },
{ .seq = "d", .code = KEY_D },
{ .seq = "e", .code = KEY_E },
{ .seq = "f", .code = KEY_F },
{ .seq = "g", .code = KEY_G },
{ .seq = "h", .code = KEY_H },
{ .seq = "i", .code = KEY_I },
{ .seq = "j", .code = KEY_J },
{ .seq = "k", .code = KEY_K },
{ .seq = "l", .code = KEY_L },
{ .seq = "m", .code = KEY_M },
{ .seq = "n", .code = KEY_N },
{ .seq = "o", .code = KEY_O },
{ .seq = "p", .code = KEY_P },
{ .seq = "q", .code = KEY_Q },
{ .seq = "r", .code = KEY_R },
{ .seq = "s", .code = KEY_S },
{ .seq = "t", .code = KEY_T },
{ .seq = "u", .code = KEY_U },
{ .seq = "v", .code = KEY_V },
{ .seq = "w", .code = KEY_W },
{ .seq = "x", .code = KEY_X },
{ .seq = "y", .code = KEY_Y },
{ .seq = "z", .code = KEY_Z },
{ .seq = "A", .code = KEY_A, .mod = KEY_MOD_SHIFT },
{ .seq = "B", .code = KEY_B, .mod = KEY_MOD_SHIFT },
{ .seq = "C", .code = KEY_C, .mod = KEY_MOD_SHIFT },
{ .seq = "D", .code = KEY_D, .mod = KEY_MOD_SHIFT },
{ .seq = "E", .code = KEY_E, .mod = KEY_MOD_SHIFT },
{ .seq = "F", .code = KEY_F, .mod = KEY_MOD_SHIFT },
{ .seq = "G", .code = KEY_G, .mod = KEY_MOD_SHIFT },
{ .seq = "H", .code = KEY_H, .mod = KEY_MOD_SHIFT },
{ .seq = "I", .code = KEY_I, .mod = KEY_MOD_SHIFT },
{ .seq = "J", .code = KEY_J, .mod = KEY_MOD_SHIFT },
{ .seq = "K", .code = KEY_K, .mod = KEY_MOD_SHIFT },
{ .seq = "L", .code = KEY_L, .mod = KEY_MOD_SHIFT },
{ .seq = "M", .code = KEY_M, .mod = KEY_MOD_SHIFT },
{ .seq = "N", .code = KEY_N, .mod = KEY_MOD_SHIFT },
{ .seq = "O", .code = KEY_O, .mod = KEY_MOD_SHIFT },
{ .seq = "P", .code = KEY_P, .mod = KEY_MOD_SHIFT },
{ .seq = "Q", .code = KEY_Q, .mod = KEY_MOD_SHIFT },
{ .seq = "R", .code = KEY_R, .mod = KEY_MOD_SHIFT },
{ .seq = "S", .code = KEY_S, .mod = KEY_MOD_SHIFT },
{ .seq = "T", .code = KEY_T, .mod = KEY_MOD_SHIFT },
{ .seq = "U", .code = KEY_U, .mod = KEY_MOD_SHIFT },
{ .seq = "V", .code = KEY_V, .mod = KEY_MOD_SHIFT },
{ .seq = "W", .code = KEY_W, .mod = KEY_MOD_SHIFT },
{ .seq = "X", .code = KEY_X, .mod = KEY_MOD_SHIFT },
{ .seq = "Y", .code = KEY_Y, .mod = KEY_MOD_SHIFT },
{ .seq = "Z", .code = KEY_Z, .mod = KEY_MOD_SHIFT },
{ .seq = "\x01", .code = KEY_A, .mod = KEY_MOD_CTRL },
{ .seq = "\x02", .code = KEY_B, .mod = KEY_MOD_CTRL },
{ .seq = "\x03", .code = KEY_C, .mod = KEY_MOD_CTRL },
{ .seq = "\x04", .code = KEY_D, .mod = KEY_MOD_CTRL },
{ .seq = "\x05", .code = KEY_E, .mod = KEY_MOD_CTRL },
{ .seq = "\x06", .code = KEY_F, .mod = KEY_MOD_CTRL },
{ .seq = "\x07", .code = KEY_G, .mod = KEY_MOD_CTRL },
{ .seq = "\x08", .code = KEY_H, .mod = KEY_MOD_CTRL },
{ .seq = "\x09", .code = KEY_I, .mod = KEY_MOD_CTRL },
{ .seq = "\x0a", .code = KEY_ENTER },
{ .seq = "\x0b", .code = KEY_K, .mod = KEY_MOD_CTRL },
{ .seq = "\x0c", .code = KEY_L, .mod = KEY_MOD_CTRL },
{ .seq = "\x0d", .code = KEY_M, .mod = KEY_MOD_CTRL },
{ .seq = "\x0e", .code = KEY_N, .mod = KEY_MOD_CTRL },
{ .seq = "\x0f", .code = KEY_O, .mod = KEY_MOD_CTRL },
{ .seq = "\x10", .code = KEY_P, .mod = KEY_MOD_CTRL },
{ .seq = "\x11", .code = KEY_Q, .mod = KEY_MOD_CTRL },
{ .seq = "\x12", .code = KEY_R, .mod = KEY_MOD_CTRL },
{ .seq = "\x13", .code = KEY_S, .mod = KEY_MOD_CTRL },
{ .seq = "\x14", .code = KEY_T, .mod = KEY_MOD_CTRL },
{ .seq = "\x15", .code = KEY_U, .mod = KEY_MOD_CTRL },
{ .seq = "\x16", .code = KEY_V, .mod = KEY_MOD_CTRL },
{ .seq = "\x17", .code = KEY_W, .mod = KEY_MOD_CTRL },
{ .seq = "\x18", .code = KEY_X, .mod = KEY_MOD_CTRL },
{ .seq = "\x19", .code = KEY_Y, .mod = KEY_MOD_CTRL },
{ .seq = "\x1a", .code = KEY_Z, .mod = KEY_MOD_CTRL },
{ .seq = "0", .code = KEY_0 },
{ .seq = "1", .code = KEY_1 },
{ .seq = "2", .code = KEY_2 },
{ .seq = "3", .code = KEY_3 },
{ .seq = "4", .code = KEY_4 },
{ .seq = "5", .code = KEY_5 },
{ .seq = "6", .code = KEY_6 },
{ .seq = "7", .code = KEY_7 },
{ .seq = "8", .code = KEY_8 },
{ .seq = "9", .code = KEY_9 },
{ .seq = " ", .code = KEY_SPACE },
{ .seq = "\x1b", .code = KEY_ESC },
{ .seq = "+", .code = KEY_KPPLUS },
{ .seq = "-", .code = KEY_KPMINUS },
{ .seq = "\x7f", .code = KEY_BACKSPACE},
{ .seq = "\x1b[A", .code = KEY_UP },
{ .seq = "\x1b[B", .code = KEY_DOWN },
{ .seq = "\x1b[C", .code = KEY_RIGHT },
{ .seq = "\x1b[D", .code = KEY_LEFT },
{ .seq = "\x1b[F", .code = KEY_END },
{ .seq = "\x1b[H", .code = KEY_HOME },
{ .seq = "\x1b[1~", .code = KEY_HOME },
{ .seq = "\x1b[2~", .code = KEY_INSERT },
{ .seq = "\x1b[3~", .code = KEY_DELETE },
{ .seq = "\x1b[4~", .code = KEY_END },
{ .seq = "\x1b[5~", .code = KEY_PAGEUP },
{ .seq = "\x1b[6~", .code = KEY_PAGEDOWN },
{ /* EOF */ }
};
static uint32_t tty_parse(const char *key, uint32_t *mod)
{
int i;
for (i = 0; termctrl[i].seq != NULL; i++) {
if (strcmp(key, termctrl[i].seq) == 0) {
*mod = termctrl[i].mod;
return termctrl[i].code;
}
}
*mod = 0;
return KEY_RESERVED;
}
/* ---------------------------------------------------------------------- */
static struct termios saved_attributes;
static int saved_fl;
static void tty_raw(void)
{
struct termios tattr;
fcntl(STDIN_FILENO, F_GETFL, &saved_fl);
tcgetattr (0, &saved_attributes);
fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK);
memcpy(&tattr,&saved_attributes,sizeof(struct termios));
tattr.c_lflag &= ~(ICANON|ECHO);
tattr.c_cc[VMIN] = 1;
tattr.c_cc[VTIME] = 0;
tcsetattr(STDIN_FILENO, TCSAFLUSH, &tattr);
}
static void tty_restore(void)
{
fcntl(STDIN_FILENO, F_SETFL, saved_fl);
tcsetattr(STDIN_FILENO, TCSANOW, &saved_attributes);
}
static int file_wait(int fd, int timeout)
{
struct timeval limit;
fd_set set;
int rc;
FD_ZERO(&set);
FD_SET(fd, &set);
limit.tv_sec = timeout;
limit.tv_usec = 0;
rc = select(fd + 1, &set, NULL, NULL,
timeout ? &limit : NULL);
return rc;
}
/* ---------------------------------------------------------------------- */
static int devcount;
static int open_restricted(const char *path, int flags, void *user_data)
{
int fd;
fd = open(path, flags);
if (fd < 0) {
fprintf(stderr, "open %s: %s\n", path, strerror(errno));
return fd;
}
fprintf(stderr, "using %s\n", path);
ioctl(fd, EVIOCGRAB, 1);
devcount++;
return fd;
}
static void close_restricted(int fd, void *user_data)
{
ioctl(fd, EVIOCGRAB, 0);
close(fd);
}
static const struct libinput_interface interface = {
.open_restricted = open_restricted,
.close_restricted = close_restricted,
};
static struct libinput *ctx;
void kbd_init(int use_libinput, dev_t gfx)
{
struct udev *udev;
struct udev_device *ugfx;
const char *seat = NULL;
if (use_libinput) {
udev = udev_new();
ugfx = udev_device_new_from_devnum(udev, 'c', gfx);
if (ugfx)
seat = udev_device_get_property_value(ugfx, "ID_SEAT");
if (!seat)
seat = "seat0";
ctx = libinput_udev_create_context(&interface, NULL, udev);
libinput_udev_assign_seat(ctx, seat);
if (devcount == 0) {
fprintf(stderr, "WARNING: no input devices available\n");
}
fprintf(stderr, "kbd: using libinput (%d devices, %s)\n",
devcount, seat);
} else {
fprintf(stderr, "kbd: using stdin from terminal\n");
tty_raw();
}
}
void kbd_fini(void)
{
if (ctx) {
libinput_unref(ctx);
} else {
tty_restore();
}
}
int kbd_wait(int timeout)
{
if (ctx) {
return file_wait(libinput_get_fd(ctx), timeout);
} else {
return file_wait(STDIN_FILENO, timeout);
}
}
int kbd_read(char *buf, uint32_t len,
uint32_t *keycode, uint32_t *modifier)
{
struct libinput_event *evt;
struct libinput_event_keyboard *kbd;
struct libinput_event_pointer *ptr;
int rc;
memset(buf, 0, len);
*keycode = KEY_RESERVED;
*modifier = 0;
if (ctx) {
rc = libinput_dispatch(ctx);
if (rc < 0)
return -1;
while ((evt = libinput_get_event(ctx)) != NULL) {
switch (libinput_event_get_type(evt)) {
case LIBINPUT_EVENT_KEYBOARD_KEY:
kbd = libinput_event_get_keyboard_event(evt);
if (libinput_event_keyboard_get_key_state(kbd))
*keycode = libinput_event_keyboard_get_key(kbd);
/* TODO: track modifier state */
/* TODO: fill buf with typed chars */
break;
case LIBINPUT_EVENT_POINTER_BUTTON:
ptr = libinput_event_get_pointer_event(evt);
if (libinput_event_pointer_get_button_state(ptr))
*keycode = libinput_event_pointer_get_button(ptr);
break;
default:
/* ignore event */
break;
}
libinput_event_destroy(evt);
}
return 0;
} else {
rc = read(STDIN_FILENO, buf, len-1);
if (rc < 1)
return -1;
*keycode = tty_parse(buf, modifier);
return rc;
}
}
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