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keyboard: add wlr_keyboard.keymap_fd

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This exposes a read-only FD with the keymap.
This commit is contained in:
Simon Ser 2021-08-07 13:48:04 +02:00 committed by Kenny Levinsen
parent 55ca93469c
commit 62924cc523
2 changed files with 34 additions and 1 deletions
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1
include/wlr/types/wlr_keyboard.h
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@ -53,6 +53,7 @@ struct wlr_keyboard {
char *keymap_string;
size_t keymap_size;
int keymap_fd;
struct xkb_keymap *keymap;
struct xkb_state *xkb_state;
xkb_led_index_t led_indexes[WLR_LED_COUNT];

34
types/wlr_keyboard.c
View file

@ -1,12 +1,15 @@
#include "util/array.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
#include <wayland-server-core.h>
#include <wlr/interfaces/wlr_keyboard.h>
#include <wlr/types/wlr_keyboard.h>
#include <wlr/util/log.h>
#include "types/wlr_keyboard.h"
#include "util/array.h"
#include "util/shm.h"
#include "util/signal.h"
void keyboard_led_update(struct wlr_keyboard *keyboard) {
@ -119,6 +122,8 @@ void wlr_keyboard_init(struct wlr_keyboard *kb,
wl_signal_init(&kb->events.repeat_info);
wl_signal_init(&kb->events.destroy);
kb->keymap_fd = -1;
// Sane defaults
kb->repeat_info.rate = 25;
kb->repeat_info.delay = 600;
@ -132,6 +137,9 @@ void wlr_keyboard_destroy(struct wlr_keyboard *kb) {
xkb_state_unref(kb->xkb_state);
xkb_keymap_unref(kb->keymap);
free(kb->keymap_string);
if (kb->keymap_fd >= 0) {
close(kb->keymap_fd);
}
if (kb->impl && kb->impl->destroy) {
kb->impl->destroy(kb);
} else {
@ -192,6 +200,30 @@ bool wlr_keyboard_set_keymap(struct wlr_keyboard *kb,
kb->keymap_string = tmp_keymap_string;
kb->keymap_size = strlen(kb->keymap_string) + 1;
int rw_fd = -1, ro_fd = -1;
if (!allocate_shm_file_pair(kb->keymap_size, &rw_fd, &ro_fd)) {
wlr_log(WLR_ERROR, "Failed to allocate shm file for keymap");
goto err;
}
void *dst = mmap(NULL, kb->keymap_size, PROT_READ | PROT_WRITE,
MAP_SHARED, rw_fd, 0);
if (dst == MAP_FAILED) {
wlr_log_errno(WLR_ERROR, "mmap failed");
close(rw_fd);
close(ro_fd);
goto err;
}
memcpy(dst, kb->keymap_string, kb->keymap_size);
munmap(dst, kb->keymap_size);
close(rw_fd);
if (kb->keymap_fd >= 0) {
close(kb->keymap_fd);
}
kb->keymap_fd = ro_fd;
for (size_t i = 0; i < kb->num_keycodes; ++i) {
xkb_keycode_t keycode = kb->keycodes[i] + 8;
xkb_state_update_key(kb->xkb_state, keycode, XKB_KEY_DOWN);