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evdev_kbd: Use current keymap 

keymap can change over time, caching the keymap causes wrong keys
returned when user changes keymap during runtime

Signed-off-by: Michal Suchanek <msuchanek@suse.de>
(cherry picked from commit 96a2a6b945)
This commit is contained in:
Michal Suchanek 2023-03-03 19:44:11 +01:00 committed by Sam Lantinga
parent 6b87d1938f
commit 987b748067
1 changed files with 49 additions and 81 deletions
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130
src/core/linux/SDL_evdev_kbd.c
View File

@ -152,45 +152,6 @@ static void SDL_EVDEV_dump_keymap(SDL_EVDEV_keyboard_state *kbd)
}
#endif /* DUMP_KEYMAP */
static int SDL_EVDEV_kbd_load_keymaps(SDL_EVDEV_keyboard_state *kbd)
{
int i, j;
kbd->key_maps = (unsigned short **)SDL_calloc(MAX_NR_KEYMAPS, sizeof(unsigned short *));
if (!kbd->key_maps) {
return -1;
}
for (i = 0; i < MAX_NR_KEYMAPS; ++i) {
struct kbentry kbe;
kbe.kb_table = i;
kbe.kb_index = 0;
if (ioctl(kbd->console_fd, KDGKBENT, &kbe) < 0) {
return -1;
}
if (kbe.kb_value == K_NOSUCHMAP) {
continue;
}
kbd->key_maps[i] = (unsigned short *)SDL_malloc(NR_KEYS * sizeof(unsigned short));
if (!kbd->key_maps[i]) {
return -1;
}
for (j = 0; j < NR_KEYS; ++j) {
kbe.kb_table = i;
kbe.kb_index = j;
if (ioctl(kbd->console_fd, KDGKBENT, &kbe) < 0) {
return -1;
}
kbd->key_maps[i][j] = (kbe.kb_value ^ 0xf000);
}
}
return 0;
}
static SDL_EVDEV_keyboard_state *kbd_cleanup_state = NULL;
static int kbd_cleanup_sigactions_installed = 0;
static int kbd_cleanup_atexit_installed = 0;
@ -338,8 +299,8 @@ SDL_EVDEV_keyboard_state *
SDL_EVDEV_kbd_init(void)
{
SDL_EVDEV_keyboard_state *kbd;
int i;
char flag_state;
char kbtype;
char shift_state[sizeof(long)] = { TIOCL_GETSHIFTSTATE, 0 };
kbd = (SDL_EVDEV_keyboard_state *)SDL_calloc(1, sizeof(*kbd));
@ -347,10 +308,14 @@ SDL_EVDEV_kbd_init(void)
return NULL;
}
kbd->npadch = -1;
/* This might fail if we're not connected to a tty (e.g. on the Steam Link) */
kbd->console_fd = open("/dev/tty", O_RDONLY | O_CLOEXEC);
if (!((ioctl(kbd->console_fd, KDGKBTYPE, &kbtype) == 0) && ((kbtype == KB_101) || (kbtype == KB_84)))) {
close(kbd->console_fd);
kbd->console_fd = -1;
}
kbd->npadch = -1;
if (ioctl(kbd->console_fd, TIOCLINUX, shift_state) == 0) {
kbd->shift_state = *shift_state;
@ -361,48 +326,27 @@ SDL_EVDEV_kbd_init(void)
}
kbd->accents = &default_accents;
if (ioctl(kbd->console_fd, KDGKBDIACR, kbd->accents) < 0) {
/* No worries, we'll use the default accent table */
}
kbd->key_maps = default_key_maps;
if (ioctl(kbd->console_fd, KDGKBMODE, &kbd->old_kbd_mode) == 0) {
/* Set the keyboard in UNICODE mode and load the keymaps */
ioctl(kbd->console_fd, KDSKBMODE, K_UNICODE);
if (SDL_EVDEV_kbd_load_keymaps(kbd) < 0) {
for (i = 0; i < MAX_NR_KEYMAPS; ++i) {
if (kbd->key_maps[i]) {
SDL_free(kbd->key_maps[i]);
}
}
SDL_free(kbd->key_maps);
kbd->key_maps = default_key_maps;
}
/* Allow inhibiting keyboard mute with env. variable for debugging etc. */
if (SDL_getenv("SDL_INPUT_LINUX_KEEP_KBD") == NULL) {
/* Mute the keyboard so keystrokes only generate evdev events
* and do not leak through to the console
*/
ioctl(kbd->console_fd, KDSKBMODE, K_OFF);
/* Make sure to restore keyboard if application fails to call
* SDL_Quit before exit or fatal signal is raised.
*/
if (!SDL_GetHintBoolean(SDL_HINT_NO_SIGNAL_HANDLERS, SDL_FALSE)) {
kbd_register_emerg_cleanup(kbd);
}
}
}
#ifdef DUMP_ACCENTS
SDL_EVDEV_dump_accents(kbd);
#endif
#ifdef DUMP_KEYMAP
SDL_EVDEV_dump_keymap(kbd);
#endif
/* Allow inhibiting keyboard mute with env. variable for debugging etc. */
if (SDL_getenv("SDL_INPUT_LINUX_KEEP_KBD") == NULL) {
/* Mute the keyboard so keystrokes only generate evdev events
* and do not leak through to the console
*/
ioctl(kbd->console_fd, KDSKBMODE, K_OFF);
/* Make sure to restore keyboard if application fails to call
* SDL_Quit before exit or fatal signal is raised.
*/
if (!SDL_GetHintBoolean(SDL_HINT_NO_SIGNAL_HANDLERS, SDL_FALSE)) {
kbd_register_emerg_cleanup(kbd);
}
}
return kbd;
}
@ -488,6 +432,11 @@ static unsigned int handle_diacr(SDL_EVDEV_keyboard_state *kbd, unsigned int ch)
kbd->diacr = 0;
if (kbd->console_fd >= 0)
if (ioctl(kbd->console_fd, KDGKBDIACR, kbd->accents) < 0) {
/* No worries, we'll use the default accent table */
}
for (i = 0; i < kbd->accents->kb_cnt; i++) {
if (kbd->accents->kbdiacr[i].diacr == d &&
kbd->accents->kbdiacr[i].base == ch) {
@ -794,7 +743,17 @@ void SDL_EVDEV_kbd_keycode(SDL_EVDEV_keyboard_state *state, unsigned int keycode
}
if (keycode < NR_KEYS) {
keysym = key_map[keycode];
if (state->console_fd < 0) {
keysym = key_map[keycode];
} else {
struct kbentry kbe;
kbe.kb_table = shift_final;
kbe.kb_index = keycode;
if (ioctl(state->console_fd, KDGKBENT, &kbe) == 0)
keysym = (kbe.kb_value ^ 0xf000);
else
return;
}
} else {
return;
}
@ -813,9 +772,18 @@ void SDL_EVDEV_kbd_keycode(SDL_EVDEV_keyboard_state *state, unsigned int keycode
type = KT_LATIN;
if (vc_kbd_led(state, K_CAPSLOCK)) {
key_map = state->key_maps[shift_final ^ (1 << KG_SHIFT)];
shift_final = shift_final ^ (1 << KG_SHIFT);
key_map = state->key_maps[shift_final];
if (key_map) {
keysym = key_map[keycode];
if (state->console_fd < 0) {
keysym = key_map[keycode];
} else {
struct kbentry kbe;
kbe.kb_table = shift_final;
kbe.kb_index = keycode;
if (ioctl(state->console_fd, KDGKBENT, &kbe) == 0)
keysym = (kbe.kb_value ^ 0xf000);
}
}
}
}