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/**
* @file lv_xkb.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_xkb.h"
#if defined(LV_LIBINPUT_XKB) && LV_LIBINPUT_XKB
#include "../../core/lv_group.h"
#include "../../misc/lv_log.h"
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static bool _set_keymap(lv_xkb_t * dsc, struct xkb_rule_names names);
/**********************
* STATIC VARIABLES
**********************/
static struct xkb_context * context = NULL;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
bool lv_xkb_init(lv_xkb_t * dsc, struct xkb_rule_names names)
{
if(!context) {
context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
if(!context) {
LV_LOG_ERROR("xkb_context_new failed: %s", strerror(errno));
return false;
}
}
return _set_keymap(dsc, names);
}
void lv_xkb_deinit(lv_xkb_t * dsc)
{
if(dsc->state) {
xkb_state_unref(dsc->state);
dsc->state = NULL;
}
if(dsc->keymap) {
xkb_keymap_unref(dsc->keymap);
dsc->keymap = NULL;
}
}
uint32_t lv_xkb_process_key(lv_xkb_t * dsc, uint32_t scancode, bool down)
{
/* Offset the evdev scancode by 8, see https://xkbcommon.org/doc/current/xkbcommon_8h.html#ac29aee92124c08d1953910ab28ee1997 */
xkb_keycode_t keycode = scancode + 8;
uint32_t result = 0;
switch(xkb_state_key_get_one_sym(dsc->state, keycode)) {
case XKB_KEY_BackSpace:
result = LV_KEY_BACKSPACE;
break;
case XKB_KEY_Return:
case XKB_KEY_KP_Enter:
result = LV_KEY_ENTER;
break;
case XKB_KEY_Prior:
case XKB_KEY_KP_Prior:
result = LV_KEY_PREV;
break;
case XKB_KEY_Next:
case XKB_KEY_KP_Next:
result = LV_KEY_NEXT;
break;
case XKB_KEY_Up:
case XKB_KEY_KP_Up:
result = LV_KEY_UP;
break;
case XKB_KEY_Left:
case XKB_KEY_KP_Left:
result = LV_KEY_LEFT;
break;
case XKB_KEY_Right:
case XKB_KEY_KP_Right:
result = LV_KEY_RIGHT;
break;
case XKB_KEY_Down:
case XKB_KEY_KP_Down:
result = LV_KEY_DOWN;
break;
case XKB_KEY_Tab:
case XKB_KEY_KP_Tab:
result = LV_KEY_NEXT;
break;
case XKB_KEY_ISO_Left_Tab: /* Sent on SHIFT + TAB */
result = LV_KEY_PREV;
break;
case XKB_KEY_Home:
case XKB_KEY_KP_Home:
result = LV_KEY_HOME;
break;
case XKB_KEY_End:
case XKB_KEY_KP_End:
result = LV_KEY_END;
break;
default:
break;
}
if(result == 0) {
char buffer[4] = { 0, 0, 0, 0 };
int size = xkb_state_key_get_utf8(dsc->state, keycode, NULL, 0) + 1;
if(size > 1) {
xkb_state_key_get_utf8(dsc->state, keycode, buffer, size);
memcpy(&result, buffer, 4);
}
}
xkb_state_update_key(dsc->state, keycode, down ? XKB_KEY_DOWN : XKB_KEY_UP);
return result;
}
/**********************
* STATIC FUNCTIONS
**********************/
static bool _set_keymap(lv_xkb_t * dsc, struct xkb_rule_names names)
{
if(dsc->keymap) {
xkb_keymap_unref(dsc->keymap);
dsc->keymap = NULL;
}
dsc->keymap = xkb_keymap_new_from_names(context, &names, XKB_KEYMAP_COMPILE_NO_FLAGS);
if(!dsc->keymap) {
LV_LOG_ERROR("xkb_keymap_new_from_names failed: %s", strerror(errno));
return false;
}
if(dsc->state) {
xkb_state_unref(dsc->state);
dsc->state = NULL;
}
dsc->state = xkb_state_new(dsc->keymap);
if(!dsc->state) {
LV_LOG_ERROR("xkb_state_new failed: %s", strerror(errno));
return false;
}
return true;
}
#endif /* defined(LV_LIBINPUT_XKB) && LV_LIBINPUT_XKB */
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