src/events/SDL_keyboard.c
author Sam Lantinga <slouken@libsdl.org>
Tue, 26 May 2015 06:27:46 -0700
changeset 9619 b94b6d0bff0f
parent 8927 be64f5daf64b
child 9678 9e8323b058d6
permissions -rw-r--r--
Updated the copyright year to 2015
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 #include "../SDL_internal.h"
    22 
    23 /* General keyboard handling code for SDL */
    24 
    25 #include "SDL_timer.h"
    26 #include "SDL_events.h"
    27 #include "SDL_events_c.h"
    28 #include "SDL_assert.h"
    29 #include "../video/SDL_sysvideo.h"
    30 
    31 
    32 /* #define DEBUG_KEYBOARD */
    33 
    34 /* Global keyboard information */
    35 
    36 typedef struct SDL_Keyboard SDL_Keyboard;
    37 
    38 struct SDL_Keyboard
    39 {
    40     /* Data common to all keyboards */
    41     SDL_Window *focus;
    42     Uint16 modstate;
    43     Uint8 keystate[SDL_NUM_SCANCODES];
    44     SDL_Keycode keymap[SDL_NUM_SCANCODES];
    45 };
    46 
    47 static SDL_Keyboard SDL_keyboard;
    48 
    49 static const SDL_Keycode SDL_default_keymap[SDL_NUM_SCANCODES] = {
    50     0, 0, 0, 0,
    51     'a',
    52     'b',
    53     'c',
    54     'd',
    55     'e',
    56     'f',
    57     'g',
    58     'h',
    59     'i',
    60     'j',
    61     'k',
    62     'l',
    63     'm',
    64     'n',
    65     'o',
    66     'p',
    67     'q',
    68     'r',
    69     's',
    70     't',
    71     'u',
    72     'v',
    73     'w',
    74     'x',
    75     'y',
    76     'z',
    77     '1',
    78     '2',
    79     '3',
    80     '4',
    81     '5',
    82     '6',
    83     '7',
    84     '8',
    85     '9',
    86     '0',
    87     SDLK_RETURN,
    88     SDLK_ESCAPE,
    89     SDLK_BACKSPACE,
    90     SDLK_TAB,
    91     SDLK_SPACE,
    92     '-',
    93     '=',
    94     '[',
    95     ']',
    96     '\\',
    97     '#',
    98     ';',
    99     '\'',
   100     '`',
   101     ',',
   102     '.',
   103     '/',
   104     SDLK_CAPSLOCK,
   105     SDLK_F1,
   106     SDLK_F2,
   107     SDLK_F3,
   108     SDLK_F4,
   109     SDLK_F5,
   110     SDLK_F6,
   111     SDLK_F7,
   112     SDLK_F8,
   113     SDLK_F9,
   114     SDLK_F10,
   115     SDLK_F11,
   116     SDLK_F12,
   117     SDLK_PRINTSCREEN,
   118     SDLK_SCROLLLOCK,
   119     SDLK_PAUSE,
   120     SDLK_INSERT,
   121     SDLK_HOME,
   122     SDLK_PAGEUP,
   123     SDLK_DELETE,
   124     SDLK_END,
   125     SDLK_PAGEDOWN,
   126     SDLK_RIGHT,
   127     SDLK_LEFT,
   128     SDLK_DOWN,
   129     SDLK_UP,
   130     SDLK_NUMLOCKCLEAR,
   131     SDLK_KP_DIVIDE,
   132     SDLK_KP_MULTIPLY,
   133     SDLK_KP_MINUS,
   134     SDLK_KP_PLUS,
   135     SDLK_KP_ENTER,
   136     SDLK_KP_1,
   137     SDLK_KP_2,
   138     SDLK_KP_3,
   139     SDLK_KP_4,
   140     SDLK_KP_5,
   141     SDLK_KP_6,
   142     SDLK_KP_7,
   143     SDLK_KP_8,
   144     SDLK_KP_9,
   145     SDLK_KP_0,
   146     SDLK_KP_PERIOD,
   147     0,
   148     SDLK_APPLICATION,
   149     SDLK_POWER,
   150     SDLK_KP_EQUALS,
   151     SDLK_F13,
   152     SDLK_F14,
   153     SDLK_F15,
   154     SDLK_F16,
   155     SDLK_F17,
   156     SDLK_F18,
   157     SDLK_F19,
   158     SDLK_F20,
   159     SDLK_F21,
   160     SDLK_F22,
   161     SDLK_F23,
   162     SDLK_F24,
   163     SDLK_EXECUTE,
   164     SDLK_HELP,
   165     SDLK_MENU,
   166     SDLK_SELECT,
   167     SDLK_STOP,
   168     SDLK_AGAIN,
   169     SDLK_UNDO,
   170     SDLK_CUT,
   171     SDLK_COPY,
   172     SDLK_PASTE,
   173     SDLK_FIND,
   174     SDLK_MUTE,
   175     SDLK_VOLUMEUP,
   176     SDLK_VOLUMEDOWN,
   177     0, 0, 0,
   178     SDLK_KP_COMMA,
   179     SDLK_KP_EQUALSAS400,
   180     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
   181     SDLK_ALTERASE,
   182     SDLK_SYSREQ,
   183     SDLK_CANCEL,
   184     SDLK_CLEAR,
   185     SDLK_PRIOR,
   186     SDLK_RETURN2,
   187     SDLK_SEPARATOR,
   188     SDLK_OUT,
   189     SDLK_OPER,
   190     SDLK_CLEARAGAIN,
   191     SDLK_CRSEL,
   192     SDLK_EXSEL,
   193     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
   194     SDLK_KP_00,
   195     SDLK_KP_000,
   196     SDLK_THOUSANDSSEPARATOR,
   197     SDLK_DECIMALSEPARATOR,
   198     SDLK_CURRENCYUNIT,
   199     SDLK_CURRENCYSUBUNIT,
   200     SDLK_KP_LEFTPAREN,
   201     SDLK_KP_RIGHTPAREN,
   202     SDLK_KP_LEFTBRACE,
   203     SDLK_KP_RIGHTBRACE,
   204     SDLK_KP_TAB,
   205     SDLK_KP_BACKSPACE,
   206     SDLK_KP_A,
   207     SDLK_KP_B,
   208     SDLK_KP_C,
   209     SDLK_KP_D,
   210     SDLK_KP_E,
   211     SDLK_KP_F,
   212     SDLK_KP_XOR,
   213     SDLK_KP_POWER,
   214     SDLK_KP_PERCENT,
   215     SDLK_KP_LESS,
   216     SDLK_KP_GREATER,
   217     SDLK_KP_AMPERSAND,
   218     SDLK_KP_DBLAMPERSAND,
   219     SDLK_KP_VERTICALBAR,
   220     SDLK_KP_DBLVERTICALBAR,
   221     SDLK_KP_COLON,
   222     SDLK_KP_HASH,
   223     SDLK_KP_SPACE,
   224     SDLK_KP_AT,
   225     SDLK_KP_EXCLAM,
   226     SDLK_KP_MEMSTORE,
   227     SDLK_KP_MEMRECALL,
   228     SDLK_KP_MEMCLEAR,
   229     SDLK_KP_MEMADD,
   230     SDLK_KP_MEMSUBTRACT,
   231     SDLK_KP_MEMMULTIPLY,
   232     SDLK_KP_MEMDIVIDE,
   233     SDLK_KP_PLUSMINUS,
   234     SDLK_KP_CLEAR,
   235     SDLK_KP_CLEARENTRY,
   236     SDLK_KP_BINARY,
   237     SDLK_KP_OCTAL,
   238     SDLK_KP_DECIMAL,
   239     SDLK_KP_HEXADECIMAL,
   240     0, 0,
   241     SDLK_LCTRL,
   242     SDLK_LSHIFT,
   243     SDLK_LALT,
   244     SDLK_LGUI,
   245     SDLK_RCTRL,
   246     SDLK_RSHIFT,
   247     SDLK_RALT,
   248     SDLK_RGUI,
   249     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,
   250     SDLK_MODE,
   251     SDLK_AUDIONEXT,
   252     SDLK_AUDIOPREV,
   253     SDLK_AUDIOSTOP,
   254     SDLK_AUDIOPLAY,
   255     SDLK_AUDIOMUTE,
   256     SDLK_MEDIASELECT,
   257     SDLK_WWW,
   258     SDLK_MAIL,
   259     SDLK_CALCULATOR,
   260     SDLK_COMPUTER,
   261     SDLK_AC_SEARCH,
   262     SDLK_AC_HOME,
   263     SDLK_AC_BACK,
   264     SDLK_AC_FORWARD,
   265     SDLK_AC_STOP,
   266     SDLK_AC_REFRESH,
   267     SDLK_AC_BOOKMARKS,
   268     SDLK_BRIGHTNESSDOWN,
   269     SDLK_BRIGHTNESSUP,
   270     SDLK_DISPLAYSWITCH,
   271     SDLK_KBDILLUMTOGGLE,
   272     SDLK_KBDILLUMDOWN,
   273     SDLK_KBDILLUMUP,
   274     SDLK_EJECT,
   275     SDLK_SLEEP,
   276 };
   277 
   278 static const char *SDL_scancode_names[SDL_NUM_SCANCODES] = {
   279     NULL, NULL, NULL, NULL,
   280     "A",
   281     "B",
   282     "C",
   283     "D",
   284     "E",
   285     "F",
   286     "G",
   287     "H",
   288     "I",
   289     "J",
   290     "K",
   291     "L",
   292     "M",
   293     "N",
   294     "O",
   295     "P",
   296     "Q",
   297     "R",
   298     "S",
   299     "T",
   300     "U",
   301     "V",
   302     "W",
   303     "X",
   304     "Y",
   305     "Z",
   306     "1",
   307     "2",
   308     "3",
   309     "4",
   310     "5",
   311     "6",
   312     "7",
   313     "8",
   314     "9",
   315     "0",
   316     "Return",
   317     "Escape",
   318     "Backspace",
   319     "Tab",
   320     "Space",
   321     "-",
   322     "=",
   323     "[",
   324     "]",
   325     "\\",
   326     "#",
   327     ";",
   328     "'",
   329     "`",
   330     ",",
   331     ".",
   332     "/",
   333     "CapsLock",
   334     "F1",
   335     "F2",
   336     "F3",
   337     "F4",
   338     "F5",
   339     "F6",
   340     "F7",
   341     "F8",
   342     "F9",
   343     "F10",
   344     "F11",
   345     "F12",
   346     "PrintScreen",
   347     "ScrollLock",
   348     "Pause",
   349     "Insert",
   350     "Home",
   351     "PageUp",
   352     "Delete",
   353     "End",
   354     "PageDown",
   355     "Right",
   356     "Left",
   357     "Down",
   358     "Up",
   359     "Numlock",
   360     "Keypad /",
   361     "Keypad *",
   362     "Keypad -",
   363     "Keypad +",
   364     "Keypad Enter",
   365     "Keypad 1",
   366     "Keypad 2",
   367     "Keypad 3",
   368     "Keypad 4",
   369     "Keypad 5",
   370     "Keypad 6",
   371     "Keypad 7",
   372     "Keypad 8",
   373     "Keypad 9",
   374     "Keypad 0",
   375     "Keypad .",
   376     NULL,
   377     "Application",
   378     "Power",
   379     "Keypad =",
   380     "F13",
   381     "F14",
   382     "F15",
   383     "F16",
   384     "F17",
   385     "F18",
   386     "F19",
   387     "F20",
   388     "F21",
   389     "F22",
   390     "F23",
   391     "F24",
   392     "Execute",
   393     "Help",
   394     "Menu",
   395     "Select",
   396     "Stop",
   397     "Again",
   398     "Undo",
   399     "Cut",
   400     "Copy",
   401     "Paste",
   402     "Find",
   403     "Mute",
   404     "VolumeUp",
   405     "VolumeDown",
   406     NULL, NULL, NULL,
   407     "Keypad ,",
   408     "Keypad = (AS400)",
   409     NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   410     NULL, NULL, NULL, NULL, NULL, NULL,
   411     "AltErase",
   412     "SysReq",
   413     "Cancel",
   414     "Clear",
   415     "Prior",
   416     "Return",
   417     "Separator",
   418     "Out",
   419     "Oper",
   420     "Clear / Again",
   421     "CrSel",
   422     "ExSel",
   423     NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   424     "Keypad 00",
   425     "Keypad 000",
   426     "ThousandsSeparator",
   427     "DecimalSeparator",
   428     "CurrencyUnit",
   429     "CurrencySubUnit",
   430     "Keypad (",
   431     "Keypad )",
   432     "Keypad {",
   433     "Keypad }",
   434     "Keypad Tab",
   435     "Keypad Backspace",
   436     "Keypad A",
   437     "Keypad B",
   438     "Keypad C",
   439     "Keypad D",
   440     "Keypad E",
   441     "Keypad F",
   442     "Keypad XOR",
   443     "Keypad ^",
   444     "Keypad %",
   445     "Keypad <",
   446     "Keypad >",
   447     "Keypad &",
   448     "Keypad &&",
   449     "Keypad |",
   450     "Keypad ||",
   451     "Keypad :",
   452     "Keypad #",
   453     "Keypad Space",
   454     "Keypad @",
   455     "Keypad !",
   456     "Keypad MemStore",
   457     "Keypad MemRecall",
   458     "Keypad MemClear",
   459     "Keypad MemAdd",
   460     "Keypad MemSubtract",
   461     "Keypad MemMultiply",
   462     "Keypad MemDivide",
   463     "Keypad +/-",
   464     "Keypad Clear",
   465     "Keypad ClearEntry",
   466     "Keypad Binary",
   467     "Keypad Octal",
   468     "Keypad Decimal",
   469     "Keypad Hexadecimal",
   470     NULL, NULL,
   471     "Left Ctrl",
   472     "Left Shift",
   473     "Left Alt",
   474     "Left GUI",
   475     "Right Ctrl",
   476     "Right Shift",
   477     "Right Alt",
   478     "Right GUI",
   479     NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   480     NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
   481     NULL,
   482     "ModeSwitch",
   483     "AudioNext",
   484     "AudioPrev",
   485     "AudioStop",
   486     "AudioPlay",
   487     "AudioMute",
   488     "MediaSelect",
   489     "WWW",
   490     "Mail",
   491     "Calculator",
   492     "Computer",
   493     "AC Search",
   494     "AC Home",
   495     "AC Back",
   496     "AC Forward",
   497     "AC Stop",
   498     "AC Refresh",
   499     "AC Bookmarks",
   500     "BrightnessDown",
   501     "BrightnessUp",
   502     "DisplaySwitch",
   503     "KBDIllumToggle",
   504     "KBDIllumDown",
   505     "KBDIllumUp",
   506     "Eject",
   507     "Sleep",
   508 };
   509 
   510 /* Taken from SDL_iconv() */
   511 char *
   512 SDL_UCS4ToUTF8(Uint32 ch, char *dst)
   513 {
   514     Uint8 *p = (Uint8 *) dst;
   515     if (ch <= 0x7F) {
   516         *p = (Uint8) ch;
   517         ++dst;
   518     } else if (ch <= 0x7FF) {
   519         p[0] = 0xC0 | (Uint8) ((ch >> 6) & 0x1F);
   520         p[1] = 0x80 | (Uint8) (ch & 0x3F);
   521         dst += 2;
   522     } else if (ch <= 0xFFFF) {
   523         p[0] = 0xE0 | (Uint8) ((ch >> 12) & 0x0F);
   524         p[1] = 0x80 | (Uint8) ((ch >> 6) & 0x3F);
   525         p[2] = 0x80 | (Uint8) (ch & 0x3F);
   526         dst += 3;
   527     } else if (ch <= 0x1FFFFF) {
   528         p[0] = 0xF0 | (Uint8) ((ch >> 18) & 0x07);
   529         p[1] = 0x80 | (Uint8) ((ch >> 12) & 0x3F);
   530         p[2] = 0x80 | (Uint8) ((ch >> 6) & 0x3F);
   531         p[3] = 0x80 | (Uint8) (ch & 0x3F);
   532         dst += 4;
   533     } else if (ch <= 0x3FFFFFF) {
   534         p[0] = 0xF8 | (Uint8) ((ch >> 24) & 0x03);
   535         p[1] = 0x80 | (Uint8) ((ch >> 18) & 0x3F);
   536         p[2] = 0x80 | (Uint8) ((ch >> 12) & 0x3F);
   537         p[3] = 0x80 | (Uint8) ((ch >> 6) & 0x3F);
   538         p[4] = 0x80 | (Uint8) (ch & 0x3F);
   539         dst += 5;
   540     } else {
   541         p[0] = 0xFC | (Uint8) ((ch >> 30) & 0x01);
   542         p[1] = 0x80 | (Uint8) ((ch >> 24) & 0x3F);
   543         p[2] = 0x80 | (Uint8) ((ch >> 18) & 0x3F);
   544         p[3] = 0x80 | (Uint8) ((ch >> 12) & 0x3F);
   545         p[4] = 0x80 | (Uint8) ((ch >> 6) & 0x3F);
   546         p[5] = 0x80 | (Uint8) (ch & 0x3F);
   547         dst += 6;
   548     }
   549     return dst;
   550 }
   551 
   552 /* Public functions */
   553 int
   554 SDL_KeyboardInit(void)
   555 {
   556     SDL_Keyboard *keyboard = &SDL_keyboard;
   557 
   558     /* Set the default keymap */
   559     SDL_memcpy(keyboard->keymap, SDL_default_keymap, sizeof(SDL_default_keymap));
   560     return (0);
   561 }
   562 
   563 void
   564 SDL_ResetKeyboard(void)
   565 {
   566     SDL_Keyboard *keyboard = &SDL_keyboard;
   567     SDL_Scancode scancode;
   568 
   569 #ifdef DEBUG_KEYBOARD
   570     printf("Resetting keyboard\n");
   571 #endif
   572     for (scancode = 0; scancode < SDL_NUM_SCANCODES; ++scancode) {
   573         if (keyboard->keystate[scancode] == SDL_PRESSED) {
   574             SDL_SendKeyboardKey(SDL_RELEASED, scancode);
   575         }
   576     }
   577 }
   578 
   579 void
   580 SDL_GetDefaultKeymap(SDL_Keycode * keymap)
   581 {
   582     SDL_memcpy(keymap, SDL_default_keymap, sizeof(SDL_default_keymap));
   583 }
   584 
   585 void
   586 SDL_SetKeymap(int start, SDL_Keycode * keys, int length)
   587 {
   588     SDL_Keyboard *keyboard = &SDL_keyboard;
   589 
   590     if (start < 0 || start + length > SDL_NUM_SCANCODES) {
   591         return;
   592     }
   593 
   594     SDL_memcpy(&keyboard->keymap[start], keys, sizeof(*keys) * length);
   595 }
   596 
   597 void
   598 SDL_SetScancodeName(SDL_Scancode scancode, const char *name)
   599 {
   600     SDL_scancode_names[scancode] = name;
   601 }
   602 
   603 SDL_Window *
   604 SDL_GetKeyboardFocus(void)
   605 {
   606     SDL_Keyboard *keyboard = &SDL_keyboard;
   607 
   608     return keyboard->focus;
   609 }
   610 
   611 void
   612 SDL_SetKeyboardFocus(SDL_Window * window)
   613 {
   614     SDL_Keyboard *keyboard = &SDL_keyboard;
   615 
   616     if (keyboard->focus && !window) {
   617         /* We won't get anymore keyboard messages, so reset keyboard state */
   618         SDL_ResetKeyboard();
   619     }
   620 
   621     /* See if the current window has lost focus */
   622     if (keyboard->focus && keyboard->focus != window) {
   623 
   624         /* new window shouldn't think it has mouse captured. */
   625         SDL_assert(!window || !(window->flags & SDL_WINDOW_MOUSE_CAPTURE));
   626 
   627         /* old window must lose an existing mouse capture. */
   628         if (keyboard->focus->flags & SDL_WINDOW_MOUSE_CAPTURE) {
   629             SDL_CaptureMouse(SDL_FALSE);  /* drop the capture. */
   630             SDL_assert(!(keyboard->focus->flags & SDL_WINDOW_MOUSE_CAPTURE));
   631         }
   632 
   633         SDL_SendWindowEvent(keyboard->focus, SDL_WINDOWEVENT_FOCUS_LOST,
   634                             0, 0);
   635 
   636         /* Ensures IME compositions are committed */
   637         if (SDL_EventState(SDL_TEXTINPUT, SDL_QUERY)) {
   638             SDL_VideoDevice *video = SDL_GetVideoDevice();
   639             if (video && video->StopTextInput) {
   640                 video->StopTextInput(video);
   641             }
   642         }
   643     }
   644 
   645     keyboard->focus = window;
   646 
   647     if (keyboard->focus) {
   648         SDL_SendWindowEvent(keyboard->focus, SDL_WINDOWEVENT_FOCUS_GAINED,
   649                             0, 0);
   650 
   651         if (SDL_EventState(SDL_TEXTINPUT, SDL_QUERY)) {
   652             SDL_VideoDevice *video = SDL_GetVideoDevice();
   653             if (video && video->StartTextInput) {
   654                 video->StartTextInput(video);
   655             }
   656         }
   657     }
   658 }
   659 
   660 int
   661 SDL_SendKeyboardKey(Uint8 state, SDL_Scancode scancode)
   662 {
   663     SDL_Keyboard *keyboard = &SDL_keyboard;
   664     int posted;
   665     Uint16 modstate;
   666     Uint32 type;
   667     Uint8 repeat;
   668 
   669     if (!scancode) {
   670         return 0;
   671     }
   672 #ifdef DEBUG_KEYBOARD
   673     printf("The '%s' key has been %s\n", SDL_GetScancodeName(scancode),
   674            state == SDL_PRESSED ? "pressed" : "released");
   675 #endif
   676     if (state == SDL_PRESSED) {
   677         modstate = keyboard->modstate;
   678         switch (scancode) {
   679         case SDL_SCANCODE_NUMLOCKCLEAR:
   680             keyboard->modstate ^= KMOD_NUM;
   681             break;
   682         case SDL_SCANCODE_CAPSLOCK:
   683             keyboard->modstate ^= KMOD_CAPS;
   684             break;
   685         case SDL_SCANCODE_LCTRL:
   686             keyboard->modstate |= KMOD_LCTRL;
   687             break;
   688         case SDL_SCANCODE_RCTRL:
   689             keyboard->modstate |= KMOD_RCTRL;
   690             break;
   691         case SDL_SCANCODE_LSHIFT:
   692             keyboard->modstate |= KMOD_LSHIFT;
   693             break;
   694         case SDL_SCANCODE_RSHIFT:
   695             keyboard->modstate |= KMOD_RSHIFT;
   696             break;
   697         case SDL_SCANCODE_LALT:
   698             keyboard->modstate |= KMOD_LALT;
   699             break;
   700         case SDL_SCANCODE_RALT:
   701             keyboard->modstate |= KMOD_RALT;
   702             break;
   703         case SDL_SCANCODE_LGUI:
   704             keyboard->modstate |= KMOD_LGUI;
   705             break;
   706         case SDL_SCANCODE_RGUI:
   707             keyboard->modstate |= KMOD_RGUI;
   708             break;
   709         case SDL_SCANCODE_MODE:
   710             keyboard->modstate |= KMOD_MODE;
   711             break;
   712         default:
   713             break;
   714         }
   715     } else {
   716         switch (scancode) {
   717         case SDL_SCANCODE_NUMLOCKCLEAR:
   718         case SDL_SCANCODE_CAPSLOCK:
   719             break;
   720         case SDL_SCANCODE_LCTRL:
   721             keyboard->modstate &= ~KMOD_LCTRL;
   722             break;
   723         case SDL_SCANCODE_RCTRL:
   724             keyboard->modstate &= ~KMOD_RCTRL;
   725             break;
   726         case SDL_SCANCODE_LSHIFT:
   727             keyboard->modstate &= ~KMOD_LSHIFT;
   728             break;
   729         case SDL_SCANCODE_RSHIFT:
   730             keyboard->modstate &= ~KMOD_RSHIFT;
   731             break;
   732         case SDL_SCANCODE_LALT:
   733             keyboard->modstate &= ~KMOD_LALT;
   734             break;
   735         case SDL_SCANCODE_RALT:
   736             keyboard->modstate &= ~KMOD_RALT;
   737             break;
   738         case SDL_SCANCODE_LGUI:
   739             keyboard->modstate &= ~KMOD_LGUI;
   740             break;
   741         case SDL_SCANCODE_RGUI:
   742             keyboard->modstate &= ~KMOD_RGUI;
   743             break;
   744         case SDL_SCANCODE_MODE:
   745             keyboard->modstate &= ~KMOD_MODE;
   746             break;
   747         default:
   748             break;
   749         }
   750         modstate = keyboard->modstate;
   751     }
   752 
   753     /* Figure out what type of event this is */
   754     switch (state) {
   755     case SDL_PRESSED:
   756         type = SDL_KEYDOWN;
   757         break;
   758     case SDL_RELEASED:
   759         type = SDL_KEYUP;
   760         break;
   761     default:
   762         /* Invalid state -- bail */
   763         return 0;
   764     }
   765 
   766     /* Drop events that don't change state */
   767     repeat = (state && keyboard->keystate[scancode]);
   768     if (keyboard->keystate[scancode] == state && !repeat) {
   769 #if 0
   770         printf("Keyboard event didn't change state - dropped!\n");
   771 #endif
   772         return 0;
   773     }
   774 
   775     /* Update internal keyboard state */
   776     keyboard->keystate[scancode] = state;
   777 
   778     /* Post the event, if desired */
   779     posted = 0;
   780     if (SDL_GetEventState(type) == SDL_ENABLE) {
   781         SDL_Event event;
   782         event.key.type = type;
   783         event.key.state = state;
   784         event.key.repeat = repeat;
   785         event.key.keysym.scancode = scancode;
   786         event.key.keysym.sym = keyboard->keymap[scancode];
   787         event.key.keysym.mod = modstate;
   788         event.key.windowID = keyboard->focus ? keyboard->focus->id : 0;
   789         posted = (SDL_PushEvent(&event) > 0);
   790     }
   791     return (posted);
   792 }
   793 
   794 int
   795 SDL_SendKeyboardText(const char *text)
   796 {
   797     SDL_Keyboard *keyboard = &SDL_keyboard;
   798     int posted;
   799 
   800     /* Don't post text events for unprintable characters */
   801     if ((unsigned char)*text < ' ' || *text == 127) {
   802         return 0;
   803     }
   804 
   805     /* Post the event, if desired */
   806     posted = 0;
   807     if (SDL_GetEventState(SDL_TEXTINPUT) == SDL_ENABLE) {
   808         SDL_Event event;
   809         event.text.type = SDL_TEXTINPUT;
   810         event.text.windowID = keyboard->focus ? keyboard->focus->id : 0;
   811         SDL_utf8strlcpy(event.text.text, text, SDL_arraysize(event.text.text));
   812         posted = (SDL_PushEvent(&event) > 0);
   813     }
   814     return (posted);
   815 }
   816 
   817 int
   818 SDL_SendEditingText(const char *text, int start, int length)
   819 {
   820     SDL_Keyboard *keyboard = &SDL_keyboard;
   821     int posted;
   822 
   823     /* Post the event, if desired */
   824     posted = 0;
   825     if (SDL_GetEventState(SDL_TEXTEDITING) == SDL_ENABLE) {
   826         SDL_Event event;
   827         event.edit.type = SDL_TEXTEDITING;
   828         event.edit.windowID = keyboard->focus ? keyboard->focus->id : 0;
   829         event.edit.start = start;
   830         event.edit.length = length;
   831         SDL_utf8strlcpy(event.edit.text, text, SDL_arraysize(event.edit.text));
   832         posted = (SDL_PushEvent(&event) > 0);
   833     }
   834     return (posted);
   835 }
   836 
   837 void
   838 SDL_KeyboardQuit(void)
   839 {
   840 }
   841 
   842 const Uint8 *
   843 SDL_GetKeyboardState(int *numkeys)
   844 {
   845     SDL_Keyboard *keyboard = &SDL_keyboard;
   846 
   847     if (numkeys != (int *) 0) {
   848         *numkeys = SDL_NUM_SCANCODES;
   849     }
   850     return keyboard->keystate;
   851 }
   852 
   853 SDL_Keymod
   854 SDL_GetModState(void)
   855 {
   856     SDL_Keyboard *keyboard = &SDL_keyboard;
   857 
   858     return keyboard->modstate;
   859 }
   860 
   861 void
   862 SDL_SetModState(SDL_Keymod modstate)
   863 {
   864     SDL_Keyboard *keyboard = &SDL_keyboard;
   865 
   866     keyboard->modstate = modstate;
   867 }
   868 
   869 SDL_Keycode
   870 SDL_GetKeyFromScancode(SDL_Scancode scancode)
   871 {
   872     SDL_Keyboard *keyboard = &SDL_keyboard;
   873 
   874     if (scancode < SDL_SCANCODE_UNKNOWN || scancode >= SDL_NUM_SCANCODES) {
   875           SDL_InvalidParamError("scancode");
   876           return 0;
   877     }
   878 
   879     return keyboard->keymap[scancode];
   880 }
   881 
   882 SDL_Scancode
   883 SDL_GetScancodeFromKey(SDL_Keycode key)
   884 {
   885     SDL_Keyboard *keyboard = &SDL_keyboard;
   886     SDL_Scancode scancode;
   887 
   888     for (scancode = SDL_SCANCODE_UNKNOWN; scancode < SDL_NUM_SCANCODES;
   889          ++scancode) {
   890         if (keyboard->keymap[scancode] == key) {
   891             return scancode;
   892         }
   893     }
   894     return SDL_SCANCODE_UNKNOWN;
   895 }
   896 
   897 const char *
   898 SDL_GetScancodeName(SDL_Scancode scancode)
   899 {
   900     const char *name;
   901     if (scancode < SDL_SCANCODE_UNKNOWN || scancode >= SDL_NUM_SCANCODES) {
   902           SDL_InvalidParamError("scancode");
   903           return "";
   904     }
   905 
   906     name = SDL_scancode_names[scancode];
   907     if (name)
   908         return name;
   909     else
   910         return "";
   911 }
   912 
   913 SDL_Scancode SDL_GetScancodeFromName(const char *name)
   914 {
   915     int i;
   916 
   917     if (!name || !*name) {
   918             SDL_InvalidParamError("name");
   919         return SDL_SCANCODE_UNKNOWN;
   920     }
   921 
   922     for (i = 0; i < SDL_arraysize(SDL_scancode_names); ++i) {
   923         if (!SDL_scancode_names[i]) {
   924             continue;
   925         }
   926         if (SDL_strcasecmp(name, SDL_scancode_names[i]) == 0) {
   927             return (SDL_Scancode)i;
   928         }
   929     }
   930 
   931     SDL_InvalidParamError("name");
   932     return SDL_SCANCODE_UNKNOWN;
   933 }
   934 
   935 const char *
   936 SDL_GetKeyName(SDL_Keycode key)
   937 {
   938     static char name[8];
   939     char *end;
   940 
   941     if (key & SDLK_SCANCODE_MASK) {
   942         return
   943             SDL_GetScancodeName((SDL_Scancode) (key & ~SDLK_SCANCODE_MASK));
   944     }
   945 
   946     switch (key) {
   947     case SDLK_RETURN:
   948         return SDL_GetScancodeName(SDL_SCANCODE_RETURN);
   949     case SDLK_ESCAPE:
   950         return SDL_GetScancodeName(SDL_SCANCODE_ESCAPE);
   951     case SDLK_BACKSPACE:
   952         return SDL_GetScancodeName(SDL_SCANCODE_BACKSPACE);
   953     case SDLK_TAB:
   954         return SDL_GetScancodeName(SDL_SCANCODE_TAB);
   955     case SDLK_SPACE:
   956         return SDL_GetScancodeName(SDL_SCANCODE_SPACE);
   957     case SDLK_DELETE:
   958         return SDL_GetScancodeName(SDL_SCANCODE_DELETE);
   959     default:
   960         /* Unaccented letter keys on latin keyboards are normally
   961            labeled in upper case (and probably on others like Greek or
   962            Cyrillic too, so if you happen to know for sure, please
   963            adapt this). */
   964         if (key >= 'a' && key <= 'z') {
   965             key -= 32;
   966         }
   967 
   968         end = SDL_UCS4ToUTF8((Uint32) key, name);
   969         *end = '\0';
   970         return name;
   971     }
   972 }
   973 
   974 SDL_Keycode
   975 SDL_GetKeyFromName(const char *name)
   976 {
   977     SDL_Keycode key;
   978 
   979         /* Check input */
   980         if (name == NULL) return SDLK_UNKNOWN;
   981 
   982     /* If it's a single UTF-8 character, then that's the keycode itself */
   983     key = *(const unsigned char *)name;
   984     if (key >= 0xF0) {
   985         if (SDL_strlen(name) == 4) {
   986             int i = 0;
   987             key  = (Uint16)(name[i]&0x07) << 18;
   988             key |= (Uint16)(name[++i]&0x3F) << 12;
   989             key |= (Uint16)(name[++i]&0x3F) << 6;
   990             key |= (Uint16)(name[++i]&0x3F);
   991             return key;
   992         }
   993         return SDLK_UNKNOWN;
   994     } else if (key >= 0xE0) {
   995         if (SDL_strlen(name) == 3) {
   996             int i = 0;
   997             key  = (Uint16)(name[i]&0x0F) << 12;
   998             key |= (Uint16)(name[++i]&0x3F) << 6;
   999             key |= (Uint16)(name[++i]&0x3F);
  1000             return key;
  1001         }
  1002         return SDLK_UNKNOWN;
  1003     } else if (key >= 0xC0) {
  1004         if (SDL_strlen(name) == 2) {
  1005             int i = 0;
  1006             key  = (Uint16)(name[i]&0x1F) << 6;
  1007             key |= (Uint16)(name[++i]&0x3F);
  1008             return key;
  1009         }
  1010         return SDLK_UNKNOWN;
  1011     } else {
  1012         if (SDL_strlen(name) == 1) {
  1013             if (key >= 'A' && key <= 'Z') {
  1014                 key += 32;
  1015             }
  1016             return key;
  1017         }
  1018 
  1019         /* Get the scancode for this name, and the associated keycode */
  1020         return SDL_default_keymap[SDL_GetScancodeFromName(name)];
  1021     }
  1022 }
  1023 
  1024 /* vi: set ts=4 sw=4 expandtab: */