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SDL_keyboard.c
1020 lines (948 loc) · 21.2 KB
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2010 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* General keyboard handling code for SDL */
#include "SDL_timer.h"
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#include "SDL_events.h"
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#include "SDL_events_c.h"
#include "SDL_sysevents.h"
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/* Global keyboard information */
static int SDL_num_keyboards;
static int SDL_current_keyboard;
static SDL_Keyboard **SDL_keyboards;
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static const SDLKey SDL_default_keymap[SDL_NUM_SCANCODES] = {
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0, 0, 0, 0,
'a',
'b',
'c',
'd',
'e',
'f',
'g',
'h',
'i',
'j',
'k',
'l',
'm',
'n',
'o',
'p',
'q',
'r',
's',
't',
'u',
'v',
'w',
'x',
'y',
'z',
'1',
'2',
'3',
'4',
'5',
'6',
'7',
'8',
'9',
'0',
SDLK_RETURN,
SDLK_ESCAPE,
SDLK_BACKSPACE,
SDLK_TAB,
SDLK_SPACE,
'-',
'=',
'[',
']',
'\\',
'#',
';',
'\'',
'`',
',',
'.',
'/',
SDLK_CAPSLOCK,
SDLK_F1,
SDLK_F2,
SDLK_F3,
SDLK_F4,
SDLK_F5,
SDLK_F6,
SDLK_F7,
SDLK_F8,
SDLK_F9,
SDLK_F10,
SDLK_F11,
SDLK_F12,
SDLK_PRINTSCREEN,
SDLK_SCROLLLOCK,
SDLK_PAUSE,
SDLK_INSERT,
SDLK_HOME,
SDLK_PAGEUP,
SDLK_DELETE,
SDLK_END,
SDLK_PAGEDOWN,
SDLK_RIGHT,
SDLK_LEFT,
SDLK_DOWN,
SDLK_UP,
SDLK_NUMLOCKCLEAR,
SDLK_KP_DIVIDE,
SDLK_KP_MULTIPLY,
SDLK_KP_MINUS,
SDLK_KP_PLUS,
SDLK_KP_ENTER,
SDLK_KP_1,
SDLK_KP_2,
SDLK_KP_3,
SDLK_KP_4,
SDLK_KP_5,
SDLK_KP_6,
SDLK_KP_7,
SDLK_KP_8,
SDLK_KP_9,
SDLK_KP_0,
SDLK_KP_PERIOD,
0,
SDLK_APPLICATION,
SDLK_POWER,
SDLK_KP_EQUALS,
SDLK_F13,
SDLK_F14,
SDLK_F15,
SDLK_F16,
SDLK_F17,
SDLK_F18,
SDLK_F19,
SDLK_F20,
SDLK_F21,
SDLK_F22,
SDLK_F23,
SDLK_F24,
SDLK_EXECUTE,
SDLK_HELP,
SDLK_MENU,
SDLK_SELECT,
SDLK_STOP,
SDLK_AGAIN,
SDLK_UNDO,
SDLK_CUT,
SDLK_COPY,
SDLK_PASTE,
SDLK_FIND,
SDLK_MUTE,
SDLK_VOLUMEUP,
SDLK_VOLUMEDOWN,
0, 0, 0,
SDLK_KP_COMMA,
SDLK_KP_EQUALSAS400,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
SDLK_ALTERASE,
SDLK_SYSREQ,
SDLK_CANCEL,
SDLK_CLEAR,
SDLK_PRIOR,
SDLK_RETURN2,
SDLK_SEPARATOR,
SDLK_OUT,
SDLK_OPER,
SDLK_CLEARAGAIN,
SDLK_CRSEL,
SDLK_EXSEL,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
SDLK_KP_00,
SDLK_KP_000,
SDLK_THOUSANDSSEPARATOR,
SDLK_DECIMALSEPARATOR,
SDLK_CURRENCYUNIT,
SDLK_CURRENCYSUBUNIT,
SDLK_KP_LEFTPAREN,
SDLK_KP_RIGHTPAREN,
SDLK_KP_LEFTBRACE,
SDLK_KP_RIGHTBRACE,
SDLK_KP_TAB,
SDLK_KP_BACKSPACE,
SDLK_KP_A,
SDLK_KP_B,
SDLK_KP_C,
SDLK_KP_D,
SDLK_KP_E,
SDLK_KP_F,
SDLK_KP_XOR,
SDLK_KP_POWER,
SDLK_KP_PERCENT,
SDLK_KP_LESS,
SDLK_KP_GREATER,
SDLK_KP_AMPERSAND,
SDLK_KP_DBLAMPERSAND,
SDLK_KP_VERTICALBAR,
SDLK_KP_DBLVERTICALBAR,
SDLK_KP_COLON,
SDLK_KP_HASH,
SDLK_KP_SPACE,
SDLK_KP_AT,
SDLK_KP_EXCLAM,
SDLK_KP_MEMSTORE,
SDLK_KP_MEMRECALL,
SDLK_KP_MEMCLEAR,
SDLK_KP_MEMADD,
SDLK_KP_MEMSUBTRACT,
SDLK_KP_MEMMULTIPLY,
SDLK_KP_MEMDIVIDE,
SDLK_KP_PLUSMINUS,
SDLK_KP_CLEAR,
SDLK_KP_CLEARENTRY,
SDLK_KP_BINARY,
SDLK_KP_OCTAL,
SDLK_KP_DECIMAL,
SDLK_KP_HEXADECIMAL,
0, 0,
SDLK_LCTRL,
SDLK_LSHIFT,
SDLK_LALT,
SDLK_LGUI,
SDLK_RCTRL,
SDLK_RSHIFT,
SDLK_RALT,
SDLK_RGUI,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
SDLK_MODE,
SDLK_AUDIONEXT,
SDLK_AUDIOPREV,
SDLK_AUDIOSTOP,
SDLK_AUDIOPLAY,
SDLK_AUDIOMUTE,
SDLK_MEDIASELECT,
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SDLK_WWW,
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SDLK_MAIL,
SDLK_CALCULATOR,
SDLK_COMPUTER,
SDLK_AC_SEARCH,
SDLK_AC_HOME,
SDLK_AC_BACK,
SDLK_AC_FORWARD,
SDLK_AC_STOP,
SDLK_AC_REFRESH,
SDLK_AC_BOOKMARKS,
SDLK_BRIGHTNESSDOWN,
SDLK_BRIGHTNESSUP,
SDLK_DISPLAYSWITCH,
SDLK_KBDILLUMTOGGLE,
SDLK_KBDILLUMDOWN,
SDLK_KBDILLUMUP,
SDLK_EJECT,
SDLK_SLEEP,
};
static const char *SDL_scancode_names[SDL_NUM_SCANCODES] = {
NULL, NULL, NULL, NULL,
"A",
"B",
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z",
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"0",
"Return",
"Escape",
"Backspace",
"Tab",
"Space",
"-",
"=",
"[",
"]",
"\\",
"#",
";",
"'",
"`",
",",
".",
"/",
"CapsLock",
"F1",
"F2",
"F3",
"F4",
"F5",
"F6",
"F7",
"F8",
"F9",
"F10",
"F11",
"F12",
"PrintScreen",
"ScrollLock",
"Pause",
"Insert",
"Home",
"PageUp",
"Delete",
"End",
"PageDown",
"Right",
"Left",
"Down",
"Up",
"Numlock",
"Keypad /",
"Keypad *",
"Keypad -",
"Keypad +",
"Keypad Enter",
"Keypad 1",
"Keypad 2",
"Keypad 3",
"Keypad 4",
"Keypad 5",
"Keypad 6",
"Keypad 7",
"Keypad 8",
"Keypad 9",
"Keypad 0",
"Keypad .",
NULL,
"Application",
"Power",
"Keypad =",
"F13",
"F14",
"F15",
"F16",
"F17",
"F18",
"F19",
"F20",
"F21",
"F22",
"F23",
"F24",
"Execute",
"Help",
"Menu",
"Select",
"Stop",
"Again",
"Undo",
"Cut",
"Copy",
"Paste",
"Find",
"Mute",
"VolumeUp",
"VolumeDown",
NULL, NULL, NULL,
"Keypad ,",
"Keypad = (AS400)",
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL,
"AltErase",
"SysReq",
"Cancel",
"Clear",
"Prior",
"Return",
"Separator",
"Out",
"Oper",
"Clear / Again",
"CrSel",
"ExSel",
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
"Keypad 00",
"Keypad 000",
"ThousandsSeparator",
"DecimalSeparator",
"CurrencyUnit",
"CurrencySubUnit",
"Keypad (",
"Keypad )",
"Keypad {",
"Keypad }",
"Keypad Tab",
"Keypad Backspace",
"Keypad A",
"Keypad B",
"Keypad C",
"Keypad D",
"Keypad E",
"Keypad F",
"Keypad XOR",
"Keypad ^",
"Keypad %",
"Keypad <",
"Keypad >",
"Keypad &",
"Keypad &&",
"Keypad |",
"Keypad ||",
"Keypad :",
"Keypad #",
"Keypad Space",
"Keypad @",
"Keypad !",
"Keypad MemStore",
"Keypad MemRecall",
"Keypad MemClear",
"Keypad MemAdd",
"Keypad MemSubtract",
"Keypad MemMultiply",
"Keypad MemDivide",
"Keypad +/-",
"Keypad Clear",
"Keypad ClearEntry",
"Keypad Binary",
"Keypad Octal",
"Keypad Decimal",
"Keypad Hexadecimal",
NULL, NULL,
"Left Ctrl",
"Left Shift",
"Left Alt",
"Left GUI",
"Right Ctrl",
"Right Shift",
"Right Alt",
"Right GUI",
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL,
"ModeSwitch",
"AudioNext",
"AudioPrev",
"AudioStop",
"AudioPlay",
"AudioMute",
"MediaSelect",
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"WWW",
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"Mail",
"Calculator",
"Computer",
"AC Search",
"AC Home",
"AC Back",
"AC Forward",
"AC Stop",
"AC Refresh",
"AC Bookmarks",
"BrightnessDown",
"BrightnessUp",
"DisplaySwitch",
"KBDIllumToggle",
"KBDIllumDown",
"KBDIllumUp",
"Eject",
"Sleep",
};
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/* Taken from SDL_iconv() */
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static char *
SDL_UCS4ToUTF8(Uint32 ch, char *dst)
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{
Uint8 *p = (Uint8 *) dst;
if (ch <= 0x7F) {
*p = (Uint8) ch;
++dst;
} else if (ch <= 0x7FF) {
p[0] = 0xC0 | (Uint8) ((ch >> 6) & 0x1F);
p[1] = 0x80 | (Uint8) (ch & 0x3F);
dst += 2;
} else if (ch <= 0xFFFF) {
p[0] = 0xE0 | (Uint8) ((ch >> 12) & 0x0F);
p[1] = 0x80 | (Uint8) ((ch >> 6) & 0x3F);
p[2] = 0x80 | (Uint8) (ch & 0x3F);
dst += 3;
} else if (ch <= 0x1FFFFF) {
p[0] = 0xF0 | (Uint8) ((ch >> 18) & 0x07);
p[1] = 0x80 | (Uint8) ((ch >> 12) & 0x3F);
p[2] = 0x80 | (Uint8) ((ch >> 6) & 0x3F);
p[3] = 0x80 | (Uint8) (ch & 0x3F);
dst += 4;
} else if (ch <= 0x3FFFFFF) {
p[0] = 0xF8 | (Uint8) ((ch >> 24) & 0x03);
p[1] = 0x80 | (Uint8) ((ch >> 18) & 0x3F);
p[2] = 0x80 | (Uint8) ((ch >> 12) & 0x3F);
p[3] = 0x80 | (Uint8) ((ch >> 6) & 0x3F);
p[4] = 0x80 | (Uint8) (ch & 0x3F);
dst += 5;
} else {
p[0] = 0xFC | (Uint8) ((ch >> 30) & 0x01);
p[1] = 0x80 | (Uint8) ((ch >> 24) & 0x3F);
p[2] = 0x80 | (Uint8) ((ch >> 18) & 0x3F);
p[3] = 0x80 | (Uint8) ((ch >> 12) & 0x3F);
p[4] = 0x80 | (Uint8) ((ch >> 6) & 0x3F);
p[5] = 0x80 | (Uint8) (ch & 0x3F);
dst += 6;
}
return dst;
}
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/* Public functions */
int
SDL_KeyboardInit(void)
{
return (0);
}
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SDL_Keyboard *
SDL_GetKeyboard(int index)
{
if (index < 0 || index >= SDL_num_keyboards) {
return NULL;
}
return SDL_keyboards[index];
}
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int
SDL_AddKeyboard(const SDL_Keyboard * keyboard, int index)
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{
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SDL_Keyboard **keyboards;
/* Add the keyboard to the list of keyboards */
if (index < 0 || index >= SDL_num_keyboards || SDL_keyboards[index]) {
keyboards =
(SDL_Keyboard **) SDL_realloc(SDL_keyboards,
(SDL_num_keyboards +
1) * sizeof(*keyboards));
if (!keyboards) {
SDL_OutOfMemory();
return -1;
}
SDL_keyboards = keyboards;
index = SDL_num_keyboards++;
}
SDL_keyboards[index] =
(SDL_Keyboard *) SDL_malloc(sizeof(*SDL_keyboards[index]));
if (!SDL_keyboards[index]) {
SDL_OutOfMemory();
return -1;
}
*SDL_keyboards[index] = *keyboard;
return index;
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}
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void
SDL_DelKeyboard(int index)
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{
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SDL_Keyboard *keyboard = SDL_GetKeyboard(index);
if (!keyboard) {
return;
}
if (keyboard->FreeKeyboard) {
keyboard->FreeKeyboard(keyboard);
}
SDL_free(keyboard);
SDL_keyboards[index] = NULL;
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}
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void
SDL_ResetKeyboard(int index)
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{
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SDL_Keyboard *keyboard = SDL_GetKeyboard(index);
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SDL_scancode scancode;
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if (!keyboard) {
return;
}
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for (scancode = 0; scancode < SDL_NUM_SCANCODES; ++scancode) {
if (keyboard->keystate[scancode] == SDL_PRESSED) {
SDL_SendKeyboardKey(index, SDL_RELEASED, scancode);
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}
}
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}
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void
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SDL_GetDefaultKeymap(SDLKey * keymap)
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{
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SDL_memcpy(keymap, SDL_default_keymap, sizeof(SDL_default_keymap));
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}
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void
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SDL_SetKeymap(int index, int start, SDLKey * keys, int length)
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{
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SDL_Keyboard *keyboard = SDL_GetKeyboard(index);
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if (!keyboard) {
return;
}
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if (start < 0 || start + length > SDL_NUM_SCANCODES) {
return;
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}
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SDL_memcpy(&keyboard->keymap[start], keys, sizeof(*keys) * length);
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}
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void
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SDL_SetScancodeName(SDL_scancode scancode, const char *name)
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{
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SDL_scancode_names[scancode] = name;
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}
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void
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SDL_SetKeyboardFocus(int index, SDL_Window * window)
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{
SDL_Keyboard *keyboard = SDL_GetKeyboard(index);
int i;
SDL_bool focus;
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if (!keyboard) {
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return;
}
/* See if the current window has lost focus */
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if (keyboard->focus && keyboard->focus != window) {
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focus = SDL_FALSE;
for (i = 0; i < SDL_num_keyboards; ++i) {
if (i != index) {
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SDL_Keyboard *check = SDL_GetKeyboard(i);
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if (check && check->focus == keyboard->focus) {
focus = SDL_TRUE;
break;
}
}
}
if (!focus) {
SDL_SendWindowEvent(keyboard->focus, SDL_WINDOWEVENT_FOCUS_LOST,
0, 0);
}
}
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keyboard->focus = window;
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if (keyboard->focus) {
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SDL_SendWindowEvent(keyboard->focus, SDL_WINDOWEVENT_FOCUS_GAINED,
0, 0);
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if (SDL_EventState(SDL_TEXTINPUT, SDL_QUERY)) {
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SDL_StartTextInput();
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}
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}
}
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int
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SDL_SendKeyboardKey(int index, Uint8 state, SDL_scancode scancode)
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{
SDL_Keyboard *keyboard = SDL_GetKeyboard(index);
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int posted;
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Uint16 modstate;
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Uint32 type;
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if (!keyboard || !scancode) {
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return 0;
}
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#if 0
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printf("The '%s' key has been %s\n", SDL_GetScancodeName(scancode),
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state == SDL_PRESSED ? "pressed" : "released");
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#endif
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if (state == SDL_PRESSED) {
modstate = keyboard->modstate;
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switch (scancode) {
case SDL_SCANCODE_NUMLOCKCLEAR:
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keyboard->modstate ^= KMOD_NUM;
break;
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case SDL_SCANCODE_CAPSLOCK:
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keyboard->modstate ^= KMOD_CAPS;
break;
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case SDL_SCANCODE_LCTRL:
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keyboard->modstate |= KMOD_LCTRL;
break;
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case SDL_SCANCODE_RCTRL:
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keyboard->modstate |= KMOD_RCTRL;
break;
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case SDL_SCANCODE_LSHIFT:
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keyboard->modstate |= KMOD_LSHIFT;
break;
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case SDL_SCANCODE_RSHIFT:
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keyboard->modstate |= KMOD_RSHIFT;
break;
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case SDL_SCANCODE_LALT:
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keyboard->modstate |= KMOD_LALT;
break;
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case SDL_SCANCODE_RALT:
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keyboard->modstate |= KMOD_RALT;
break;
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case SDL_SCANCODE_LGUI:
keyboard->modstate |= KMOD_LGUI;
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break;
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case SDL_SCANCODE_RGUI:
keyboard->modstate |= KMOD_RGUI;
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break;
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case SDL_SCANCODE_MODE:
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keyboard->modstate |= KMOD_MODE;
break;
default:
break;
}
} else {
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switch (scancode) {
case SDL_SCANCODE_NUMLOCKCLEAR:
case SDL_SCANCODE_CAPSLOCK:
747
break;
748
case SDL_SCANCODE_LCTRL:
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keyboard->modstate &= ~KMOD_LCTRL;
break;
751
case SDL_SCANCODE_RCTRL:
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keyboard->modstate &= ~KMOD_RCTRL;
break;
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case SDL_SCANCODE_LSHIFT:
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756
keyboard->modstate &= ~KMOD_LSHIFT;
break;
757
case SDL_SCANCODE_RSHIFT:
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759
keyboard->modstate &= ~KMOD_RSHIFT;
break;
760
case SDL_SCANCODE_LALT:
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keyboard->modstate &= ~KMOD_LALT;
break;
763
case SDL_SCANCODE_RALT:
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765
keyboard->modstate &= ~KMOD_RALT;
break;
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case SDL_SCANCODE_LGUI:
keyboard->modstate &= ~KMOD_LGUI;
768
break;
769
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case SDL_SCANCODE_RGUI:
keyboard->modstate &= ~KMOD_RGUI;
771
break;
772
case SDL_SCANCODE_MODE:
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keyboard->modstate &= ~KMOD_MODE;
break;
default:
break;
}
modstate = keyboard->modstate;
}
/* Figure out what type of event this is */
switch (state) {
case SDL_PRESSED:
type = SDL_KEYDOWN;
break;
case SDL_RELEASED:
type = SDL_KEYUP;
break;
default:
/* Invalid state -- bail */
return 0;
}
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795
/* Drop events that don't change state */
if (keyboard->keystate[scancode] == state) {
796
#if 0
797
printf("Keyboard event didn't change state - dropped!\n");
798
#endif
799
return 0;
800
801
}
802
803
804
/* Update internal keyboard state */
keyboard->keystate[scancode] = state;
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806
/* Post the event, if desired */
posted = 0;
807
if (SDL_GetEventState(type) == SDL_ENABLE) {
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811
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SDL_Event event;
event.key.type = type;
event.key.which = (Uint8) index;
event.key.state = state;
event.key.keysym.scancode = scancode;
813
event.key.keysym.sym = keyboard->keymap[scancode];
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815
event.key.keysym.mod = modstate;
event.key.keysym.unicode = 0;
816
event.key.windowID = keyboard->focus->id;
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posted = (SDL_PushEvent(&event) > 0);
}
return (posted);
}
int
SDL_SendKeyboardText(int index, const char *text)
{
SDL_Keyboard *keyboard = SDL_GetKeyboard(index);
int posted;
if (!keyboard) {
return 0;
}
/* Post the event, if desired */
posted = 0;
834
if (SDL_GetEventState(SDL_TEXTINPUT) == SDL_ENABLE) {
835
836
SDL_Event event;
event.text.type = SDL_TEXTINPUT;
837
event.text.windowID = keyboard->focus ? keyboard->focus->id : 0;
838
839
event.text.which = (Uint8) index;
SDL_strlcpy(event.text.text, text, SDL_arraysize(event.text.text));
840
event.text.windowID = keyboard->focus->id;
841
842
843
posted = (SDL_PushEvent(&event) > 0);
}
return (posted);
844
845
}
846
int
847
SDL_SendEditingText(int index, const char *text, int start, int length)
848
{
849
SDL_Keyboard *keyboard = SDL_GetKeyboard(index);
850
851
int posted;
852
if (!keyboard) {
853
return 0;
854
}
855
856
857
/* Post the event, if desired */
posted = 0;
858
if (SDL_GetEventState(SDL_TEXTEDITING) == SDL_ENABLE) {
859
860
SDL_Event event;
event.edit.type = SDL_TEXTEDITING;
861
862
event.edit.windowID = keyboard->focus ? keyboard->focus->id : 0;
event.text.which = (Uint8) index;
863
864
event.edit.start = start;
event.edit.length = length;
865
SDL_strlcpy(event.edit.text, text, SDL_arraysize(event.edit.text));
866
867
868
869
870
posted = (SDL_PushEvent(&event) > 0);
}
return (posted);
}
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
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950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
void
SDL_KeyboardQuit(void)
{
int i;
for (i = 0; i < SDL_num_keyboards; ++i) {
SDL_DelKeyboard(i);
}
SDL_num_keyboards = 0;
SDL_current_keyboard = 0;
if (SDL_keyboards) {
SDL_free(SDL_keyboards);
SDL_keyboards = NULL;
}
}
int
SDL_GetNumKeyboards(void)
{
return SDL_num_keyboards;
}
int
SDL_SelectKeyboard(int index)
{
if (index >= 0 && index < SDL_num_keyboards) {
SDL_current_keyboard = index;
}
return SDL_current_keyboard;
}
Uint8 *
SDL_GetKeyboardState(int *numkeys)
{
SDL_Keyboard *keyboard = SDL_GetKeyboard(SDL_current_keyboard);
if (numkeys != (int *) 0) {
*numkeys = SDL_NUM_SCANCODES;
}
if (!keyboard) {
return NULL;
}
return keyboard->keystate;
}
SDLMod
SDL_GetModState(void)
{
SDL_Keyboard *keyboard = SDL_GetKeyboard(SDL_current_keyboard);
if (!keyboard) {
return KMOD_NONE;
}
return keyboard->modstate;
}
void
SDL_SetModState(SDLMod modstate)
{
SDL_Keyboard *keyboard = SDL_GetKeyboard(SDL_current_keyboard);
if (!keyboard) {
return;
}
keyboard->modstate = modstate;
}
SDLKey
SDL_GetKeyFromScancode(SDL_scancode scancode)
{
SDL_Keyboard *keyboard = SDL_GetKeyboard(SDL_current_keyboard);
if (!keyboard) {
return SDLK_UNKNOWN;
}
return keyboard->keymap[scancode];
}
SDL_scancode
SDL_GetScancodeFromKey(SDLKey key)
{
SDL_Keyboard *keyboard = SDL_GetKeyboard(SDL_current_keyboard);
SDL_scancode scancode;
if (!keyboard) {
return SDL_SCANCODE_UNKNOWN;
}
for (scancode = SDL_SCANCODE_UNKNOWN; scancode < SDL_NUM_SCANCODES;
++scancode) {
if (keyboard->keymap[scancode] == key) {
return scancode;
}
}
return SDL_SCANCODE_UNKNOWN;
}
const char *
SDL_GetScancodeName(SDL_scancode scancode)
{
const char *name = SDL_scancode_names[scancode];
if (name)
return name;
else
return "";
}
const char *
SDL_GetKeyName(SDLKey key)
{
static char name[8];
char *end;
if (key & SDLK_SCANCODE_MASK) {
return
SDL_GetScancodeName((SDL_scancode) (key & ~SDLK_SCANCODE_MASK));
}
992
993
switch (key) {
case SDLK_RETURN:
994
return SDL_GetScancodeName(SDL_SCANCODE_RETURN);
995
case SDLK_ESCAPE:
996
return SDL_GetScancodeName(SDL_SCANCODE_ESCAPE);
997
case SDLK_BACKSPACE:
998
return SDL_GetScancodeName(SDL_SCANCODE_BACKSPACE);
999
case SDLK_TAB:
1000
return SDL_GetScancodeName(SDL_SCANCODE_TAB);