llkeyboardsdl.cpp

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#if LL_SDL

#include "linden_common.h"
#include "llkeyboardsdl.h"
#include "llwindow.h"
#include "SDL/SDL.h"

LLKeyboardSDL::LLKeyboardSDL()
{
        // Set up key mapping for SDL - eventually can read this from a file?
        // Anything not in the key map gets dropped
        // Add default A-Z

        // Virtual key mappings from SDL_keysym.h ...

        // SDL maps the letter keys to the ASCII you'd expect, but it's lowercase...
        U16 cur_char;
        for (cur_char = 'A'; cur_char <= 'Z'; cur_char++)
        {
                mTranslateKeyMap[cur_char] = cur_char;
        }
        for (cur_char = 'a'; cur_char <= 'z'; cur_char++)
        {
                mTranslateKeyMap[cur_char] = (cur_char - 'a') + 'A';
        }

        for (cur_char = '0'; cur_char <= '9'; cur_char++)
        {
                mTranslateKeyMap[cur_char] = cur_char;
        }

        // These ones are translated manually upon keydown/keyup because
        // SDL doesn't handle their numlock transition.
        //mTranslateKeyMap[SDLK_KP4] = KEY_PAD_LEFT;
        //mTranslateKeyMap[SDLK_KP6] = KEY_PAD_RIGHT;
        //mTranslateKeyMap[SDLK_KP8] = KEY_PAD_UP;
        //mTranslateKeyMap[SDLK_KP2] = KEY_PAD_DOWN;
        //mTranslateKeyMap[SDLK_KP_PERIOD] = KEY_DELETE;
        //mTranslateKeyMap[SDLK_KP7] = KEY_HOME;
        //mTranslateKeyMap[SDLK_KP1] = KEY_END;
        //mTranslateKeyMap[SDLK_KP9] = KEY_PAGE_UP;
        //mTranslateKeyMap[SDLK_KP3] = KEY_PAGE_DOWN;
        //mTranslateKeyMap[SDLK_KP0] = KEY_INSERT;

        mTranslateKeyMap[SDLK_SPACE] = ' ';
        mTranslateKeyMap[SDLK_RETURN] = KEY_RETURN;
        mTranslateKeyMap[SDLK_LEFT] = KEY_LEFT;
        mTranslateKeyMap[SDLK_RIGHT] = KEY_RIGHT;
        mTranslateKeyMap[SDLK_UP] = KEY_UP;
        mTranslateKeyMap[SDLK_DOWN] = KEY_DOWN;
        mTranslateKeyMap[SDLK_ESCAPE] = KEY_ESCAPE;
        mTranslateKeyMap[SDLK_KP_ENTER] = KEY_RETURN;
        mTranslateKeyMap[SDLK_ESCAPE] = KEY_ESCAPE;
        mTranslateKeyMap[SDLK_BACKSPACE] = KEY_BACKSPACE;
        mTranslateKeyMap[SDLK_DELETE] = KEY_DELETE;
        mTranslateKeyMap[SDLK_LSHIFT] = KEY_SHIFT;
        mTranslateKeyMap[SDLK_RSHIFT] = KEY_SHIFT;
        mTranslateKeyMap[SDLK_LCTRL] = KEY_CONTROL;
        mTranslateKeyMap[SDLK_RCTRL] = KEY_CONTROL;
        mTranslateKeyMap[SDLK_LALT] = KEY_ALT;
        mTranslateKeyMap[SDLK_RALT] = KEY_ALT;
        mTranslateKeyMap[SDLK_HOME] = KEY_HOME;
        mTranslateKeyMap[SDLK_END] = KEY_END;
        mTranslateKeyMap[SDLK_PAGEUP] = KEY_PAGE_UP;
        mTranslateKeyMap[SDLK_PAGEDOWN] = KEY_PAGE_DOWN;
        mTranslateKeyMap[SDLK_MINUS] = KEY_HYPHEN;
        mTranslateKeyMap[SDLK_EQUALS] = KEY_EQUALS;
        mTranslateKeyMap[SDLK_KP_EQUALS] = KEY_EQUALS;
        mTranslateKeyMap[SDLK_INSERT] = KEY_INSERT;
        mTranslateKeyMap[SDLK_CAPSLOCK] = KEY_CAPSLOCK;
        mTranslateKeyMap[SDLK_TAB] = KEY_TAB;
        mTranslateKeyMap[SDLK_KP_PLUS] = KEY_ADD;
        mTranslateKeyMap[SDLK_KP_MINUS] = KEY_SUBTRACT;
        mTranslateKeyMap[SDLK_KP_MULTIPLY] = KEY_MULTIPLY;
        mTranslateKeyMap[SDLK_KP_DIVIDE] = KEY_PAD_DIVIDE;
        mTranslateKeyMap[SDLK_F1] = KEY_F1;
        mTranslateKeyMap[SDLK_F2] = KEY_F2;
        mTranslateKeyMap[SDLK_F3] = KEY_F3;
        mTranslateKeyMap[SDLK_F4] = KEY_F4;
        mTranslateKeyMap[SDLK_F5] = KEY_F5;
        mTranslateKeyMap[SDLK_F6] = KEY_F6;
        mTranslateKeyMap[SDLK_F7] = KEY_F7;
        mTranslateKeyMap[SDLK_F8] = KEY_F8;
        mTranslateKeyMap[SDLK_F9] = KEY_F9;
        mTranslateKeyMap[SDLK_F10] = KEY_F10;
        mTranslateKeyMap[SDLK_F11] = KEY_F11;
        mTranslateKeyMap[SDLK_F12] = KEY_F12;
        mTranslateKeyMap[SDLK_PLUS]   = '=';
        mTranslateKeyMap[SDLK_COMMA]  = ',';
        mTranslateKeyMap[SDLK_MINUS]  = '-';
        mTranslateKeyMap[SDLK_PERIOD] = '.';
        mTranslateKeyMap[SDLK_BACKQUOTE] = '`';
        mTranslateKeyMap[SDLK_SLASH] = KEY_DIVIDE;
        mTranslateKeyMap[SDLK_SEMICOLON] = ';';
        mTranslateKeyMap[SDLK_LEFTBRACKET] = '[';
        mTranslateKeyMap[SDLK_BACKSLASH] = '\\';
        mTranslateKeyMap[SDLK_RIGHTBRACKET] = ']';
        mTranslateKeyMap[SDLK_QUOTE] = '\'';

        // Build inverse map
        std::map<U16, KEY>::iterator iter;
        for (iter = mTranslateKeyMap.begin(); iter != mTranslateKeyMap.end(); iter++)
        {
                mInvTranslateKeyMap[iter->second] = iter->first;
        }

        // numpad map
        mTranslateNumpadMap[SDLK_KP0] = KEY_PAD_INS;
        mTranslateNumpadMap[SDLK_KP1] = KEY_PAD_END;
        mTranslateNumpadMap[SDLK_KP2] = KEY_PAD_DOWN;
        mTranslateNumpadMap[SDLK_KP3] = KEY_PAD_PGDN;
        mTranslateNumpadMap[SDLK_KP4] = KEY_PAD_LEFT;
        mTranslateNumpadMap[SDLK_KP5] = KEY_PAD_CENTER;
        mTranslateNumpadMap[SDLK_KP6] = KEY_PAD_RIGHT;
        mTranslateNumpadMap[SDLK_KP7] = KEY_PAD_HOME;
        mTranslateNumpadMap[SDLK_KP8] = KEY_PAD_UP;
        mTranslateNumpadMap[SDLK_KP9] = KEY_PAD_PGUP;
        mTranslateNumpadMap[SDLK_KP_PERIOD] = KEY_PAD_DEL;

        // build inverse numpad map
        for (iter = mTranslateNumpadMap.begin();
             iter != mTranslateNumpadMap.end();
             iter++)
        {
                mInvTranslateNumpadMap[iter->second] = iter->first;
        }
}

void LLKeyboardSDL::resetMaskKeys()
{
        SDLMod mask = SDL_GetModState();

        // MBW -- XXX -- This mirrors the operation of the Windows version of resetMaskKeys().
        //    It looks a bit suspicious, as it won't correct for keys that have been released.
        //    Is this the way it's supposed to work?

        if(mask & KMOD_SHIFT)
        {
                mKeyLevel[KEY_SHIFT] = TRUE;
        }

        if(mask & KMOD_CTRL)
        {
                mKeyLevel[KEY_CONTROL] = TRUE;
        }

        if(mask & KMOD_ALT)
        {
                mKeyLevel[KEY_ALT] = TRUE;
        }
}


MASK LLKeyboardSDL::updateModifiers(const U32 mask)
{
        // translate the mask
        MASK out_mask = MASK_NONE;

        if(mask & KMOD_SHIFT)
        {
                out_mask |= MASK_SHIFT;
        }

        if(mask & KMOD_CTRL)
        {
                out_mask |= MASK_CONTROL;
        }

        if(mask & KMOD_ALT)
        {
                out_mask |= MASK_ALT;
        }

        return out_mask;
}


static U16 adjustNativekeyFromUnhandledMask(const U16 key, const U32 mask)
{
        // SDL doesn't automatically adjust the keysym according to
        // whether NUMLOCK is engaged, so we massage the keysym manually.
        U16 rtn = key;
        if (!(mask & KMOD_NUM))
        {
                switch (key)
                {
                case SDLK_KP_PERIOD: rtn = SDLK_DELETE; break;
                case SDLK_KP0: rtn = SDLK_INSERT; break;
                case SDLK_KP1: rtn = SDLK_END; break;
                case SDLK_KP2: rtn = SDLK_DOWN; break;
                case SDLK_KP3: rtn = SDLK_PAGEDOWN; break;
                case SDLK_KP4: rtn = SDLK_LEFT; break;
                case SDLK_KP6: rtn = SDLK_RIGHT; break;
                case SDLK_KP7: rtn = SDLK_HOME; break;
                case SDLK_KP8: rtn = SDLK_UP; break;
                case SDLK_KP9: rtn = SDLK_PAGEUP; break;
                }
        }
        return rtn;
}


BOOL LLKeyboardSDL::handleKeyDown(const U16 key, const U32 mask)
{
        U16     adjusted_nativekey;
        KEY     translated_key = 0;
        U32     translated_mask = MASK_NONE;
        BOOL    handled = FALSE;

        adjusted_nativekey = adjustNativekeyFromUnhandledMask(key, mask);

        translated_mask = updateModifiers(mask);
        
        if(translateNumpadKey(adjusted_nativekey, &translated_key))
        {
                handled = handleTranslatedKeyDown(translated_key, translated_mask);
        }

        return handled;
}


BOOL LLKeyboardSDL::handleKeyUp(const U16 key, const U32 mask)
{
        U16     adjusted_nativekey;
        KEY     translated_key = 0;
        U32     translated_mask = MASK_NONE;
        BOOL    handled = FALSE;

        adjusted_nativekey = adjustNativekeyFromUnhandledMask(key, mask);

        translated_mask = updateModifiers(mask);

        if(translateNumpadKey(adjusted_nativekey, &translated_key))
        {
                handled = handleTranslatedKeyUp(translated_key, translated_mask);
        }

        return handled;
}

MASK LLKeyboardSDL::currentMask(BOOL for_mouse_event)
{
        MASK result = MASK_NONE;
        SDLMod mask = SDL_GetModState();

        if (mask & KMOD_SHIFT)                  result |= MASK_SHIFT;
        if (mask & KMOD_CTRL)                   result |= MASK_CONTROL;
        if (mask & KMOD_ALT)                    result |= MASK_ALT;

        // For keyboard events, consider Meta keys equivalent to Control
        if (!for_mouse_event)
        {
                if (mask & KMOD_META) result |= MASK_CONTROL;
        }

        return result;
}

void LLKeyboardSDL::scanKeyboard()
{
        for (S32 key = 0; key < KEY_COUNT; key++)
        {
                // Generate callback if any event has occurred on this key this frame.
                // Can't just test mKeyLevel, because this could be a slow frame and
                // key might have gone down then up. JC
                if (mKeyLevel[key] || mKeyDown[key] || mKeyUp[key])
                {
                        mCurScanKey = key;
                        mCallbacks->handleScanKey(key, mKeyDown[key], mKeyUp[key], mKeyLevel[key]);
                }
        }

        // Reset edges for next frame
        for (S32 key = 0; key < KEY_COUNT; key++)
        {
                mKeyUp[key] = FALSE;
                mKeyDown[key] = FALSE;
                if (mKeyLevel[key])
                {
                        mKeyLevelFrameCount[key]++;
                }
        }
}

 
BOOL LLKeyboardSDL::translateNumpadKey( const U16 os_key, KEY *translated_key)
{
        if(mNumpadDistinct == ND_NUMLOCK_ON)
        {
                std::map<U16, KEY>::iterator iter= mTranslateNumpadMap.find(os_key);
                if(iter != mTranslateNumpadMap.end())
                {
                        *translated_key = iter->second;
                        return TRUE;
                }
        }
        BOOL success = translateKey(os_key, translated_key);
        return success; 
}

U16 LLKeyboardSDL::inverseTranslateNumpadKey(const KEY translated_key)
{
        if(mNumpadDistinct == ND_NUMLOCK_ON)
        {
                std::map<KEY, U16>::iterator iter= mInvTranslateNumpadMap.find(translated_key);
                if(iter != mInvTranslateNumpadMap.end())
                {
                        return iter->second;
                }
        }
        return inverseTranslateKey(translated_key);
}

#endif

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