/**
 * @file llkeyboardmacosx.cpp
 * @brief Handler for assignable key bindings
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * 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 Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#if LL_DARWIN

#include "linden_common.h"
#include "llkeyboardmacosx.h"
#include "llwindowcallbacks.h"

#include "llwindowmacosx-objc.h"

LLKeyboardMacOSX::LLKeyboardMacOSX()
{
    // Virtual keycode mapping table.  Yes, this was as annoying to generate as it looks.
    mTranslateKeyMap[0x00] = 'A';
    mTranslateKeyMap[0x01] = 'S';
    mTranslateKeyMap[0x02] = 'D';
    mTranslateKeyMap[0x03] = 'F';
    mTranslateKeyMap[0x04] = 'H';
    mTranslateKeyMap[0x05] = 'G';
    mTranslateKeyMap[0x06] = 'Z';
    mTranslateKeyMap[0x07] = 'X';
    mTranslateKeyMap[0x08] = 'C';
    mTranslateKeyMap[0x09] = 'V';
    mTranslateKeyMap[0x0b] = 'B';
    mTranslateKeyMap[0x0c] = 'Q';
    mTranslateKeyMap[0x0d] = 'W';
    mTranslateKeyMap[0x0e] = 'E';
    mTranslateKeyMap[0x0f] = 'R';
    mTranslateKeyMap[0x10] = 'Y';
    mTranslateKeyMap[0x11] = 'T';
    mTranslateKeyMap[0x12] = '1';
    mTranslateKeyMap[0x13] = '2';
    mTranslateKeyMap[0x14] = '3';
    mTranslateKeyMap[0x15] = '4';
    mTranslateKeyMap[0x16] = '6';
    mTranslateKeyMap[0x17] = '5';
    mTranslateKeyMap[0x18] = '=';   // KEY_EQUALS
    mTranslateKeyMap[0x19] = '9';
    mTranslateKeyMap[0x1a] = '7';
    mTranslateKeyMap[0x1b] = '-';   // KEY_HYPHEN
    mTranslateKeyMap[0x1c] = '8';
    mTranslateKeyMap[0x1d] = '0';
    mTranslateKeyMap[0x1e] = ']';
    mTranslateKeyMap[0x1f] = 'O';
    mTranslateKeyMap[0x20] = 'U';
    mTranslateKeyMap[0x21] = '[';
    mTranslateKeyMap[0x22] = 'I';
    mTranslateKeyMap[0x23] = 'P';
    mTranslateKeyMap[0x24] = KEY_RETURN,
    mTranslateKeyMap[0x25] = 'L';
    mTranslateKeyMap[0x26] = 'J';
    mTranslateKeyMap[0x27] = '\'';
    mTranslateKeyMap[0x28] = 'K';
    mTranslateKeyMap[0x29] = ';';
    mTranslateKeyMap[0x2a] = '\\';
    mTranslateKeyMap[0x2b] = ',';
    mTranslateKeyMap[0x2c] = KEY_DIVIDE;
    mTranslateKeyMap[0x2d] = 'N';
    mTranslateKeyMap[0x2e] = 'M';
    mTranslateKeyMap[0x2f] = '.';
    mTranslateKeyMap[0x30] = KEY_TAB;
    mTranslateKeyMap[0x31] = ' ';   // space!
    mTranslateKeyMap[0x32] = '`';
    mTranslateKeyMap[0x33] = KEY_BACKSPACE;
    mTranslateKeyMap[0x35] = KEY_ESCAPE;
    //mTranslateKeyMap[0x37] = 0;   // Command key.  (not used yet)
    mTranslateKeyMap[0x38] = KEY_SHIFT;
    mTranslateKeyMap[0x39] = KEY_CAPSLOCK;
    mTranslateKeyMap[0x3a] = KEY_ALT;
    mTranslateKeyMap[0x3b] = KEY_CONTROL;
    mTranslateKeyMap[0x41] = '.';   // keypad
    mTranslateKeyMap[0x43] = '*';   // keypad
    mTranslateKeyMap[0x45] = '+';   // keypad
    mTranslateKeyMap[0x4b] = KEY_PAD_DIVIDE;    // keypad
    mTranslateKeyMap[0x4c] = KEY_RETURN;    // keypad enter
    mTranslateKeyMap[0x4e] = '-';   // keypad
    mTranslateKeyMap[0x51] = '=';   // keypad
    mTranslateKeyMap[0x52] = '0';   // keypad
    mTranslateKeyMap[0x53] = '1';   // keypad
    mTranslateKeyMap[0x54] = '2';   // keypad
    mTranslateKeyMap[0x55] = '3';   // keypad
    mTranslateKeyMap[0x56] = '4';   // keypad
    mTranslateKeyMap[0x57] = '5';   // keypad
    mTranslateKeyMap[0x58] = '6';   // keypad
    mTranslateKeyMap[0x59] = '7';   // keypad
    mTranslateKeyMap[0x5b] = '8';   // keypad
    mTranslateKeyMap[0x5c] = '9';   // keypad
    mTranslateKeyMap[0x60] = KEY_F5;
    mTranslateKeyMap[0x61] = KEY_F6;
    mTranslateKeyMap[0x62] = KEY_F7;
    mTranslateKeyMap[0x63] = KEY_F3;
    mTranslateKeyMap[0x64] = KEY_F8;
    mTranslateKeyMap[0x65] = KEY_F9;
    mTranslateKeyMap[0x67] = KEY_F11;
    mTranslateKeyMap[0x6d] = KEY_F10;
    mTranslateKeyMap[0x6f] = KEY_F12;
    mTranslateKeyMap[0x72] = KEY_INSERT;
    mTranslateKeyMap[0x73] = KEY_HOME;
    mTranslateKeyMap[0x74] = KEY_PAGE_UP;
    mTranslateKeyMap[0x75] = KEY_DELETE;
    mTranslateKeyMap[0x76] = KEY_F4;
    mTranslateKeyMap[0x77] = KEY_END;
    mTranslateKeyMap[0x78] = KEY_F2;
    mTranslateKeyMap[0x79] = KEY_PAGE_DOWN;
    mTranslateKeyMap[0x7a] = KEY_F1;
    mTranslateKeyMap[0x7b] = KEY_LEFT;
    mTranslateKeyMap[0x7c] = KEY_RIGHT;
    mTranslateKeyMap[0x7d] = KEY_DOWN;
    mTranslateKeyMap[0x7e] = KEY_UP;

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

    // build numpad maps
    mTranslateNumpadMap[0x52] = KEY_PAD_INS;    // keypad 0
    mTranslateNumpadMap[0x53] = KEY_PAD_END;   // keypad 1
    mTranslateNumpadMap[0x54] = KEY_PAD_DOWN;   // keypad 2
    mTranslateNumpadMap[0x55] = KEY_PAD_PGDN;   // keypad 3
    mTranslateNumpadMap[0x56] = KEY_PAD_LEFT;   // keypad 4
    mTranslateNumpadMap[0x57] = KEY_PAD_CENTER; // keypad 5
    mTranslateNumpadMap[0x58] = KEY_PAD_RIGHT;  // keypad 6
    mTranslateNumpadMap[0x59] = KEY_PAD_HOME;   // keypad 7
    mTranslateNumpadMap[0x5b] = KEY_PAD_UP;     // keypad 8
    mTranslateNumpadMap[0x5c] = KEY_PAD_PGUP;   // keypad 9
    mTranslateNumpadMap[0x41] = KEY_PAD_DEL;    // keypad .
    mTranslateNumpadMap[0x4c] = KEY_PAD_RETURN; // keypad enter

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

void LLKeyboardMacOSX::resetMaskKeys()
{
    MASK mask = getModifiers();

    // 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?

    // We apply the modifier masks directly within getModifiers.  So check to see which masks we've applied.

    if(mask & MAC_SHIFT_KEY)
    {
        mKeyLevel[KEY_SHIFT] = true;
    }

    if(mask & MAC_CTRL_KEY)
    {
        mKeyLevel[KEY_CONTROL] = true;
    }

    if(mask & MAC_ALT_KEY)
    {
        mKeyLevel[KEY_ALT] = true;
    }
}

/*
static bool translateKeyMac(const U16 key, const MASK mask, KEY &outKey, U32 &outMask)
{
    // Translate the virtual keycode into the keycodes the keyboard system expects.
    U16 virtualKey = (mask >> 24) & 0x0000007F;
    outKey = macKeyTransArray[virtualKey];


    return(outKey != 0);
}
*/

void LLKeyboardMacOSX::handleModifier(MASK mask)
{
    updateModifiers(mask);
}

MASK LLKeyboardMacOSX::updateModifiers(const MASK mask)
{
    // translate the mask
    MASK out_mask = 0;

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

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

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

    return out_mask;
}

bool LLKeyboardMacOSX::handleKeyDown(const U16 key, MASK mask)
{
    KEY     translated_key = 0;
    U32     translated_mask = 0;
    bool    handled = false;

    translated_mask = updateModifiers(mask);

    if(translateNumpadKey(key, &translated_key))
    {
        handled = handleTranslatedKeyDown(translated_key, translated_mask);
    }

    return handled;
}


bool LLKeyboardMacOSX::handleKeyUp(const U16 key, MASK mask)
{
    KEY     translated_key = 0;
    U32     translated_mask = 0;
    bool    handled = false;

    translated_mask = updateModifiers(mask);

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

    return handled;
}

MASK LLKeyboardMacOSX::currentMask(bool for_mouse_event)
{
    MASK result = MASK_NONE;
    MASK mask = getModifiers();

    if (mask & MAC_SHIFT_KEY)           result |= MASK_SHIFT;
    if (mask & MAC_CTRL_KEY)            result |= MASK_CONTROL;
    if (mask & MAC_ALT_KEY)             result |= MASK_ALT;

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

    return result;
}

void LLKeyboardMacOSX::scanKeyboard()
{
    S32 key;
    for (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]);
        }
    }
    mCurScanKey = KEY_NONE;

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

bool LLKeyboardMacOSX::translateNumpadKey( const U16 os_key, KEY *translated_key )
{
    return translateKey(os_key, translated_key);
}

U16 LLKeyboardMacOSX::inverseTranslateNumpadKey(const KEY translated_key)
{
    return inverseTranslateKey(translated_key);
}

#endif // LL_DARWIN