This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_keyboard.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 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 */
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int SDL_TranslateUNICODE = 0;
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static int SDL_num_keyboards;
static int SDL_current_keyboard;
static SDL_Keyboard **SDL_keyboards;
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static const char *SDL_keynames[SDLK_LAST]; /* Array of keycode names */
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/* Public functions */
int
SDL_KeyboardInit(void)
{
int i;
/* Set default mode of UNICODE translation */
SDL_EnableUNICODE(DEFAULT_UNICODE_TRANSLATION);
/* Initialize the tables */
for (i = 0; i < SDL_arraysize(SDL_keynames); ++i) {
switch (i) {
case SDLK_BACKSPACE:
SDL_keynames[i] = "backspace";
break;
case SDLK_TAB:
SDL_keynames[i] = "tab";
break;
case SDLK_CLEAR:
SDL_keynames[i] = "clear";
break;
case SDLK_RETURN:
SDL_keynames[i] = "return";
break;
case SDLK_PAUSE:
SDL_keynames[i] = "pause";
break;
case SDLK_ESCAPE:
SDL_keynames[i] = "escape";
break;
case SDLK_SPACE:
SDL_keynames[i] = "space";
break;
case SDLK_KP0:
SDL_keynames[i] = "[0]";
break;
case SDLK_KP1:
SDL_keynames[i] = "[1]";
break;
case SDLK_KP2:
SDL_keynames[i] = "[2]";
break;
case SDLK_KP3:
SDL_keynames[i] = "[3]";
break;
case SDLK_KP4:
SDL_keynames[i] = "[4]";
break;
case SDLK_KP5:
SDL_keynames[i] = "[5]";
break;
case SDLK_KP6:
SDL_keynames[i] = "[6]";
break;
case SDLK_KP7:
SDL_keynames[i] = "[7]";
break;
case SDLK_KP8:
SDL_keynames[i] = "[8]";
break;
case SDLK_KP9:
SDL_keynames[i] = "[9]";
break;
case SDLK_KP_PERIOD:
SDL_keynames[i] = "[.]";
break;
case SDLK_KP_DIVIDE:
SDL_keynames[i] = "[/]";
break;
case SDLK_KP_MULTIPLY:
SDL_keynames[i] = "[*]";
break;
case SDLK_KP_MINUS:
SDL_keynames[i] = "[-]";
break;
case SDLK_KP_PLUS:
SDL_keynames[i] = "[+]";
break;
case SDLK_KP_ENTER:
SDL_keynames[i] = "enter";
break;
case SDLK_KP_EQUALS:
SDL_keynames[i] = "equals";
break;
case SDLK_UP:
SDL_keynames[i] = "up";
break;
case SDLK_DOWN:
SDL_keynames[i] = "down";
break;
case SDLK_RIGHT:
SDL_keynames[i] = "right";
break;
case SDLK_LEFT:
SDL_keynames[i] = "left";
break;
case SDLK_INSERT:
SDL_keynames[i] = "insert";
break;
case SDLK_HOME:
SDL_keynames[i] = "home";
break;
case SDLK_END:
SDL_keynames[i] = "end";
break;
case SDLK_PAGEUP:
SDL_keynames[i] = "page up";
break;
case SDLK_PAGEDOWN:
SDL_keynames[i] = "page down";
break;
case SDLK_F1:
SDL_keynames[i] = "f1";
break;
case SDLK_F2:
SDL_keynames[i] = "f2";
break;
case SDLK_F3:
SDL_keynames[i] = "f3";
break;
case SDLK_F4:
SDL_keynames[i] = "f4";
break;
case SDLK_F5:
SDL_keynames[i] = "f5";
break;
case SDLK_F6:
SDL_keynames[i] = "f6";
break;
case SDLK_F7:
SDL_keynames[i] = "f7";
break;
case SDLK_F8:
SDL_keynames[i] = "f8";
break;
case SDLK_F9:
SDL_keynames[i] = "f9";
break;
case SDLK_F10:
SDL_keynames[i] = "f10";
break;
case SDLK_F11:
SDL_keynames[i] = "f11";
break;
case SDLK_F12:
SDL_keynames[i] = "f12";
break;
case SDLK_F13:
SDL_keynames[i] = "f13";
break;
case SDLK_F14:
SDL_keynames[i] = "f14";
break;
case SDLK_F15:
SDL_keynames[i] = "f15";
break;
case SDLK_NUMLOCK:
SDL_keynames[i] = "numlock";
break;
case SDLK_CAPSLOCK:
SDL_keynames[i] = "caps lock";
break;
case SDLK_SCROLLOCK:
SDL_keynames[i] = "scroll lock";
break;
case SDLK_RSHIFT:
SDL_keynames[i] = "right shift";
break;
case SDLK_LSHIFT:
SDL_keynames[i] = "left shift";
break;
case SDLK_RCTRL:
SDL_keynames[i] = "right ctrl";
break;
case SDLK_LCTRL:
SDL_keynames[i] = "left ctrl";
break;
case SDLK_RALT:
SDL_keynames[i] = "right alt";
break;
case SDLK_LALT:
SDL_keynames[i] = "left alt";
break;
case SDLK_RMETA:
SDL_keynames[i] = "right meta";
break;
case SDLK_LMETA:
SDL_keynames[i] = "left meta";
break;
case SDLK_LSUPER:
SDL_keynames[i] = "left super"; /* "Windows" keys */
break;
case SDLK_RSUPER:
SDL_keynames[i] = "right super";
break;
case SDLK_MODE:
SDL_keynames[i] = "alt gr";
break;
case SDLK_COMPOSE:
SDL_keynames[i] = "compose";
break;
case SDLK_HELP:
SDL_keynames[i] = "help";
break;
case SDLK_PRINT:
SDL_keynames[i] = "print screen";
break;
case SDLK_SYSREQ:
SDL_keynames[i] = "sys req";
break;
case SDLK_BREAK:
SDL_keynames[i] = "break";
break;
case SDLK_MENU:
SDL_keynames[i] = "menu";
break;
case SDLK_POWER:
SDL_keynames[i] = "power";
break;
case SDLK_EURO:
SDL_keynames[i] = "euro";
break;
case SDLK_UNDO:
SDL_keynames[i] = "undo";
break;
default:
SDL_keynames[i] = NULL;
break;
}
}
/* Done. Whew. */
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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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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void
SDL_ResetKeyboard(int index)
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{
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SDL_Keyboard *keyboard = SDL_GetKeyboard(index);
SDLKey key;
if (!keyboard) {
return;
}
for (key = SDLK_FIRST; key < SDLK_LAST; ++key) {
if (keyboard->keystate[key] == SDL_PRESSED) {
SDL_SendKeyboardKey(index, SDL_RELEASED, 0, key);
}
}
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}
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void
SDL_KeyboardQuit(void)
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{
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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;
}
}
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int
SDL_GetNumKeyboards(void)
{
return SDL_num_keyboards;
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}
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int
SDL_SelectKeyboard(int index)
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{
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if (index >= 0 && index < SDL_num_keyboards) {
SDL_current_keyboard = index;
}
return SDL_current_keyboard;
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}
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int
SDL_EnableUNICODE(int enable)
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{
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int old_mode;
old_mode = SDL_TranslateUNICODE;
if (enable >= 0) {
SDL_TranslateUNICODE = enable;
}
return (old_mode);
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}
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Uint8 *
SDL_GetKeyState(int *numkeys)
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{
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SDL_Keyboard *keyboard = SDL_GetKeyboard(SDL_current_keyboard);
if (numkeys != (int *) 0) {
*numkeys = SDLK_LAST;
}
if (!keyboard) {
return NULL;
}
return keyboard->keystate;
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}
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SDLMod
SDL_GetModState(void)
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{
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SDL_Keyboard *keyboard = SDL_GetKeyboard(SDL_current_keyboard);
if (!keyboard) {
return KMOD_NONE;
}
return keyboard->modstate;
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}
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void
SDL_SetModState(SDLMod modstate)
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{
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SDL_Keyboard *keyboard = SDL_GetKeyboard(SDL_current_keyboard);
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if (!keyboard) {
return;
}
keyboard->modstate = modstate;
}
const char *
SDL_GetKeyName(SDLKey key)
{
const char *keyname;
if (key < SDL_arraysize(SDL_keynames)) {
keyname = SDL_keynames[key];
} else {
keyname = NULL;
}
if (keyname == NULL) {
if (key < 256) {
static char temp[4];
char *cvt;
temp[0] = (char) key;
temp[1] = '\0';
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cvt = SDL_iconv_string("UTF-8", "ISO-8859-1", temp, 1);
if (cvt) {
SDL_strlcpy(temp, cvt, SDL_arraysize(temp));
SDL_free(cvt);
}
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keyname = temp;
} else {
keyname = "unknown key";
}
}
return keyname;
}
void
SDL_SetKeyboardFocus(int index, SDL_WindowID windowID)
{
SDL_Keyboard *keyboard = SDL_GetKeyboard(index);
int i;
SDL_bool focus;
if (!keyboard || (keyboard->focus == windowID)) {
return;
}
/* See if the current window has lost focus */
if (keyboard->focus) {
focus = SDL_FALSE;
for (i = 0; i < SDL_num_keyboards; ++i) {
SDL_Keyboard *check;
if (i != index) {
check = SDL_GetKeyboard(i);
if (check && check->focus == keyboard->focus) {
focus = SDL_TRUE;
break;
}
}
}
if (!focus) {
SDL_SendWindowEvent(keyboard->focus, SDL_WINDOWEVENT_FOCUS_LOST,
0, 0);
}
}
keyboard->focus = windowID;
if (keyboard->focus) {
focus = SDL_FALSE;
for (i = 0; i < SDL_num_keyboards; ++i) {
SDL_Keyboard *check;
if (i != index) {
check = SDL_GetKeyboard(i);
if (check && check->focus == keyboard->focus) {
focus = SDL_TRUE;
break;
}
}
}
if (!focus) {
SDL_SendWindowEvent(keyboard->focus, SDL_WINDOWEVENT_FOCUS_GAINED,
0, 0);
}
}
}
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int
SDL_SendKeyboardKey(int index, Uint8 state, Uint8 scancode, SDLKey key)
{
SDL_Keyboard *keyboard = SDL_GetKeyboard(index);
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Uint16 modstate;
Uint8 type;
if (!keyboard) {
return 0;
}
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#if 0
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printf("The '%s' key has been %s\n", SDL_GetKeyName(key),
state == SDL_PRESSED ? "pressed" : "released");
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#endif
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if (state == SDL_PRESSED) {
modstate = keyboard->modstate;
switch (key) {
case SDLK_UNKNOWN:
break;
case SDLK_NUMLOCK:
keyboard->modstate ^= KMOD_NUM;
break;
case SDLK_CAPSLOCK:
keyboard->modstate ^= KMOD_CAPS;
break;
case SDLK_LCTRL:
keyboard->modstate |= KMOD_LCTRL;
break;
case SDLK_RCTRL:
keyboard->modstate |= KMOD_RCTRL;
break;
case SDLK_LSHIFT:
keyboard->modstate |= KMOD_LSHIFT;
break;
case SDLK_RSHIFT:
keyboard->modstate |= KMOD_RSHIFT;
break;
case SDLK_LALT:
keyboard->modstate |= KMOD_LALT;
break;
case SDLK_RALT:
keyboard->modstate |= KMOD_RALT;
break;
case SDLK_LMETA:
keyboard->modstate |= KMOD_LMETA;
break;
case SDLK_RMETA:
keyboard->modstate |= KMOD_RMETA;
break;
case SDLK_MODE:
keyboard->modstate |= KMOD_MODE;
break;
default:
break;
}
} else {
switch (key) {
case SDLK_UNKNOWN:
break;
case SDLK_NUMLOCK:
case SDLK_CAPSLOCK:
break;
case SDLK_LCTRL:
keyboard->modstate &= ~KMOD_LCTRL;
break;
case SDLK_RCTRL:
keyboard->modstate &= ~KMOD_RCTRL;
break;
case SDLK_LSHIFT:
keyboard->modstate &= ~KMOD_LSHIFT;
break;
case SDLK_RSHIFT:
keyboard->modstate &= ~KMOD_RSHIFT;
break;
case SDLK_LALT:
keyboard->modstate &= ~KMOD_LALT;
break;
case SDLK_RALT:
keyboard->modstate &= ~KMOD_RALT;
break;
case SDLK_LMETA:
keyboard->modstate &= ~KMOD_LMETA;
break;
case SDLK_RMETA:
keyboard->modstate &= ~KMOD_RMETA;
break;
case SDLK_MODE:
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;
}
if (key != SDLK_UNKNOWN) {
/* Drop events that don't change state */
if (keyboard->keystate[key] == state) {
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printf("Keyboard event didn't change state - dropped!\n");
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return 0;
}
/* Update internal keyboard state */
keyboard->keystate[key] = state;
}
/* Post the event, if desired */
posted = 0;
if (SDL_ProcessEvents[type] == SDL_ENABLE) {
SDL_Event event;
event.key.type = type;
event.key.which = (Uint8) index;
event.key.state = state;
event.key.keysym.scancode = scancode;
event.key.keysym.sym = (Uint16) key;
event.key.keysym.mod = modstate;
event.key.keysym.unicode = 0;
event.key.windowID = keyboard->focus;
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;
if (SDL_ProcessEvents[SDL_TEXTINPUT] == SDL_ENABLE) {
SDL_Event event;
event.text.type = SDL_TEXTINPUT;
event.text.which = (Uint8) index;
SDL_strlcpy(event.text.text, text, SDL_arraysize(event.text.text));
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event.text.windowID = keyboard->focus;
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posted = (SDL_PushEvent(&event) > 0);
}
return (posted);
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}
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/* vi: set ts=4 sw=4 expandtab: */