/*

Simple DirectMedia Layer

Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>

This software is provided 'as-is', without any express or implied

warranty. In no event will the authors be held liable for any damages

arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,

including commercial applications, and to alter it and redistribute it

freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not

claim that you wrote the original software. If you use this software

in a product, an acknowledgment in the product documentation would be

appreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be

misrepresented as being the original software.

3. This notice may not be removed or altered from any source distribution.

*/

#include "../../SDL_internal.h"

#if SDL_VIDEO_DRIVER_X11

#include "SDL_x11video.h"

#include "../../events/SDL_keyboard_c.h"

#include "../../events/scancodes_darwin.h"

#include "../../events/scancodes_xfree86.h"

#include <X11/keysym.h>

#include "imKStoUCS.h"

/* *INDENT-OFF* */

static const struct {

KeySym keysym;

SDL_Scancode scancode;

} KeySymToSDLScancode[] = {

{ XK_Return, SDL_SCANCODE_RETURN },

{ XK_Escape, SDL_SCANCODE_ESCAPE },

{ XK_BackSpace, SDL_SCANCODE_BACKSPACE },

{ XK_Tab, SDL_SCANCODE_TAB },

{ XK_Caps_Lock, SDL_SCANCODE_CAPSLOCK },

{ XK_F1, SDL_SCANCODE_F1 },

{ XK_F2, SDL_SCANCODE_F2 },

{ XK_F3, SDL_SCANCODE_F3 },

{ XK_F4, SDL_SCANCODE_F4 },

{ XK_F5, SDL_SCANCODE_F5 },

{ XK_F6, SDL_SCANCODE_F6 },

{ XK_F7, SDL_SCANCODE_F7 },

{ XK_F8, SDL_SCANCODE_F8 },

{ XK_F9, SDL_SCANCODE_F9 },

{ XK_F10, SDL_SCANCODE_F10 },

{ XK_F11, SDL_SCANCODE_F11 },

{ XK_F12, SDL_SCANCODE_F12 },

{ XK_Print, SDL_SCANCODE_PRINTSCREEN },

{ XK_Scroll_Lock, SDL_SCANCODE_SCROLLLOCK },

{ XK_Pause, SDL_SCANCODE_PAUSE },

{ XK_Insert, SDL_SCANCODE_INSERT },

{ XK_Home, SDL_SCANCODE_HOME },

{ XK_Prior, SDL_SCANCODE_PAGEUP },

{ XK_Delete, SDL_SCANCODE_DELETE },

{ XK_End, SDL_SCANCODE_END },

{ XK_Next, SDL_SCANCODE_PAGEDOWN },

{ XK_Right, SDL_SCANCODE_RIGHT },

{ XK_Left, SDL_SCANCODE_LEFT },

{ XK_Down, SDL_SCANCODE_DOWN },

{ XK_Up, SDL_SCANCODE_UP },

{ XK_Num_Lock, SDL_SCANCODE_NUMLOCKCLEAR },

{ XK_KP_Divide, SDL_SCANCODE_KP_DIVIDE },

{ XK_KP_Multiply, SDL_SCANCODE_KP_MULTIPLY },

{ XK_KP_Subtract, SDL_SCANCODE_KP_MINUS },

{ XK_KP_Add, SDL_SCANCODE_KP_PLUS },

{ XK_KP_Enter, SDL_SCANCODE_KP_ENTER },

{ XK_KP_Delete, SDL_SCANCODE_KP_PERIOD },

{ XK_KP_End, SDL_SCANCODE_KP_1 },

{ XK_KP_Down, SDL_SCANCODE_KP_2 },

{ XK_KP_Next, SDL_SCANCODE_KP_3 },

{ XK_KP_Left, SDL_SCANCODE_KP_4 },

{ XK_KP_Begin, SDL_SCANCODE_KP_5 },

{ XK_KP_Right, SDL_SCANCODE_KP_6 },

{ XK_KP_Home, SDL_SCANCODE_KP_7 },

{ XK_KP_Up, SDL_SCANCODE_KP_8 },

{ XK_KP_Prior, SDL_SCANCODE_KP_9 },

{ XK_KP_Insert, SDL_SCANCODE_KP_0 },

{ XK_KP_Decimal, SDL_SCANCODE_KP_PERIOD },

{ XK_KP_1, SDL_SCANCODE_KP_1 },

{ XK_KP_2, SDL_SCANCODE_KP_2 },

{ XK_KP_3, SDL_SCANCODE_KP_3 },

{ XK_KP_4, SDL_SCANCODE_KP_4 },

{ XK_KP_5, SDL_SCANCODE_KP_5 },

{ XK_KP_6, SDL_SCANCODE_KP_6 },

{ XK_KP_7, SDL_SCANCODE_KP_7 },

{ XK_KP_8, SDL_SCANCODE_KP_8 },

{ XK_KP_9, SDL_SCANCODE_KP_9 },

{ XK_KP_0, SDL_SCANCODE_KP_0 },

{ XK_KP_Decimal, SDL_SCANCODE_KP_PERIOD },

{ XK_Hyper_R, SDL_SCANCODE_APPLICATION },

{ XK_KP_Equal, SDL_SCANCODE_KP_EQUALS },

{ XK_F13, SDL_SCANCODE_F13 },

{ XK_F14, SDL_SCANCODE_F14 },

{ XK_F15, SDL_SCANCODE_F15 },

{ XK_F16, SDL_SCANCODE_F16 },

{ XK_F17, SDL_SCANCODE_F17 },

{ XK_F18, SDL_SCANCODE_F18 },

{ XK_F19, SDL_SCANCODE_F19 },

{ XK_F20, SDL_SCANCODE_F20 },

{ XK_F21, SDL_SCANCODE_F21 },

{ XK_F22, SDL_SCANCODE_F22 },

{ XK_F23, SDL_SCANCODE_F23 },

{ XK_F24, SDL_SCANCODE_F24 },

{ XK_Execute, SDL_SCANCODE_EXECUTE },

{ XK_Help, SDL_SCANCODE_HELP },

{ XK_Menu, SDL_SCANCODE_MENU },

{ XK_Select, SDL_SCANCODE_SELECT },

{ XK_Cancel, SDL_SCANCODE_STOP },

{ XK_Redo, SDL_SCANCODE_AGAIN },

{ XK_Undo, SDL_SCANCODE_UNDO },

{ XK_Find, SDL_SCANCODE_FIND },

{ XK_KP_Separator, SDL_SCANCODE_KP_COMMA },

{ XK_Sys_Req, SDL_SCANCODE_SYSREQ },

{ XK_Control_L, SDL_SCANCODE_LCTRL },

{ XK_Shift_L, SDL_SCANCODE_LSHIFT },

{ XK_Alt_L, SDL_SCANCODE_LALT },

{ XK_Meta_L, SDL_SCANCODE_LGUI },

{ XK_Super_L, SDL_SCANCODE_LGUI },

{ XK_Control_R, SDL_SCANCODE_RCTRL },

{ XK_Shift_R, SDL_SCANCODE_RSHIFT },

{ XK_Alt_R, SDL_SCANCODE_RALT },

{ XK_Meta_R, SDL_SCANCODE_RGUI },

{ XK_Super_R, SDL_SCANCODE_RGUI },

{ XK_Mode_switch, SDL_SCANCODE_MODE },

};

static const struct

{

SDL_Scancode const *table;

int table_size;

} scancode_set[] = {

{ darwin_scancode_table, SDL_arraysize(darwin_scancode_table) },

{ xfree86_scancode_table, SDL_arraysize(xfree86_scancode_table) },

{ xfree86_scancode_table2, SDL_arraysize(xfree86_scancode_table2) },

};

/* *INDENT-OFF* */

/* 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 = 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 = 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 (sdl@libsdl.org):\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 = 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");

return 0;

}

void

X11_UpdateKeymap(_THIS)

{

SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;

int i;

SDL_Scancode scancode;

SDL_Keycode keymap[SDL_NUM_SCANCODES];

SDL_GetDefaultKeymap(keymap);

for (i = 0; i < SDL_arraysize(data->key_layout); i++) {

Uint32 key;

/* Make sure this is a valid scancode */

scancode = data->key_layout[i];

if (scancode == SDL_SCANCODE_UNKNOWN) {

continue;

}

/* See if there is a UCS keycode for this scancode */

key = X11_KeyCodeToUcs4(data->display, (KeyCode)i);

if (key) {

keymap[scancode] = key;

}

}

SDL_SetKeymap(0, keymap, SDL_NUM_SCANCODES);

}

void

X11_QuitKeyboard(_THIS)

{

}

#endif /* SDL_VIDEO_DRIVER_X11 */

/* vi: set ts=4 sw=4 expandtab: */