KeySym
X11_KeyCodeToSym(_THIS, KeyCode keycode, unsigned char group)
{
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
KeySym keysym;
#if SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
if (data->xkb) {
int num_groups = XkbKeyNumGroups(data->xkb, keycode);
unsigned char info = XkbKeyGroupInfo(data->xkb, keycode);
if (num_groups && group >= num_groups) {
int action = XkbOutOfRangeGroupAction(info);
if (action == XkbRedirectIntoRange) {
if ((group = XkbOutOfRangeGroupNumber(info)) >= num_groups) {
group = 0;
}
} else if (action == XkbClampIntoRange) {
group = num_groups - 1;
} else {
group %= num_groups;
}
}
keysym = X11_XkbKeycodeToKeysym(data->display, keycode, group, 0);
} else {
keysym = X11_XKeycodeToKeysym(data->display, keycode, 0);
}
#else
keysym = X11_XKeycodeToKeysym(data->display, keycode, 0);
#endif
return keysym;
}
/* This function only works for keyboards in US QWERTY layout */
static SDL_Scancode
X11_KeyCodeToSDLScancode(Display *display, KeyCode keycode)
{
KeySym keysym;
int i;
#if SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
keysym = X11_XkbKeycodeToKeysym(display, keycode, 0, 0);
#else
keysym = X11_XKeycodeToKeysym(display, keycode, 0);
#endif
if (keysym == NoSymbol) {
return SDL_SCANCODE_UNKNOWN;
}
if (keysym >= XK_A && keysym <= XK_Z) {
return SDL_SCANCODE_A + (keysym - XK_A);
}
if (keysym >= XK_0 && keysym <= XK_9) {
return SDL_SCANCODE_0 + (keysym - XK_0);
}
for (i = 0; i < SDL_arraysize(KeySymToSDLScancode); ++i) {
if (keysym == KeySymToSDLScancode[i].keysym) {
return KeySymToSDLScancode[i].scancode;
}
}
return SDL_SCANCODE_UNKNOWN;
}
static Uint32
X11_KeyCodeToUcs4(Display *display, KeyCode keycode)
{
KeySym keysym;
#if SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
keysym = X11_XkbKeycodeToKeysym(display, keycode, 0, 0);
#else
keysym = X11_XKeycodeToKeysym(display, keycode, 0);
#endif
if (keysym == NoSymbol) {
return 0;
}
return X11_KeySymToUcs4(keysym);
}
int
X11_InitKeyboard(_THIS)
{
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
int i = 0;
int j = 0;
int min_keycode, max_keycode;
struct {
SDL_Scancode scancode;
KeySym keysym;
int value;
} fingerprint[] = {
{ SDL_SCANCODE_HOME, XK_Home, 0 },
{ SDL_SCANCODE_PAGEUP, XK_Prior, 0 },
{ SDL_SCANCODE_UP, XK_Up, 0 },
{ SDL_SCANCODE_LEFT, XK_Left, 0 },
{ SDL_SCANCODE_DELETE, XK_Delete, 0 },
{ SDL_SCANCODE_KP_ENTER, XK_KP_Enter, 0 },
};
int best_distance;
int best_index;
int distance;
X11_XAutoRepeatOn(data->display);
/* Try to determine which scancodes are being used based on fingerprint */
best_distance = SDL_arraysize(fingerprint) + 1;
best_index = -1;
X11_XDisplayKeycodes(data->display, &min_keycode, &max_keycode);
for (i = 0; i < SDL_arraysize(fingerprint); ++i) {
fingerprint[i].value =
X11_XKeysymToKeycode(data->display, fingerprint[i].keysym) -
min_keycode;
}
for (i = 0; i < SDL_arraysize(scancode_set); ++i) {
/* Make sure the scancode set isn't too big */
if ((max_keycode - min_keycode + 1) <= scancode_set[i].table_size) {
continue;
}
distance = 0;
for (j = 0; j < SDL_arraysize(fingerprint); ++j) {
if (fingerprint[j].value < 0
|| fingerprint[j].value >= scancode_set[i].table_size) {
distance += 1;
} else if (scancode_set[i].table[fingerprint[j].value] != fingerprint[j].scancode) {
distance += 1;
}
}
if (distance < best_distance) {
best_distance = distance;
best_index = i;
}
}
if (best_index >= 0 && best_distance <= 2) {
#ifdef DEBUG_KEYBOARD
printf("Using scancode set %d, min_keycode = %d, max_keycode = %d, table_size = %d\n", best_index, min_keycode, max_keycode, scancode_set[best_index].table_size);
#endif
SDL_memcpy(&data->key_layout[min_keycode], scancode_set[best_index].table,
sizeof(SDL_Scancode) * scancode_set[best_index].table_size);
} else {
SDL_Keycode keymap[SDL_NUM_SCANCODES];
printf
("Keyboard layout unknown, please send the following to the SDL mailing list ([email protected]):\n");
/* Determine key_layout - only works on US QWERTY layout */
SDL_GetDefaultKeymap(keymap);
for (i = min_keycode; i <= max_keycode; ++i) {
KeySym sym;
#if SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
sym = X11_XkbKeycodeToKeysym(data->display, i, 0, 0);
#else
sym = X11_XKeycodeToKeysym(data->display, i, 0);
#endif
if (sym != NoSymbol) {
SDL_Scancode scancode;
printf("code = %d, sym = 0x%X (%s) ", i - min_keycode,
(unsigned int) sym, X11_XKeysymToString(sym));
scancode = X11_KeyCodeToSDLScancode(data->display, i);
data->key_layout[i] = scancode;
if (scancode == SDL_SCANCODE_UNKNOWN) {
printf("scancode not found\n");
} else {
printf("scancode = %d (%s)\n", scancode, SDL_GetScancodeName(scancode));
}
}
}
}
X11_UpdateKeymap(_this);
SDL_SetScancodeName(SDL_SCANCODE_APPLICATION, "Menu");
#ifdef SDL_USE_IBUS
SDL_IBus_Init();
#endif
return 0;
}