/* Copyright (C) 2009-2015 The Android Open Source Project
**
** This software is licensed under the terms of the GNU General Public
** License version 2, as published by the Free Software Foundation, and
** may be copied, distributed, and modified under those terms.
**
** This program 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 General Public License for more details.
*/
#include "android/skin/keycode.h"

#include "android/utils/bufprint.h"

#include <stddef.h>
#include <string.h>

SkinKeyCode skin_keycode_rotate(SkinKeyCode code, int  rotation) {
    static const SkinKeyCode  wheel[4] = { kKeyCodeDpadUp,
                                           kKeyCodeDpadRight,
                                           kKeyCodeDpadDown,
                                           kKeyCodeDpadLeft };
    int  index;

    for (index = 0; index < 4; index++) {
        if (code == wheel[index]) {
            index = (index + rotation) & 3;
            code  = wheel[index];
            break;
        }
    }
    return code;
}

#define  _KEYSYM1_(x)  _KEYSYM_(x,x)

#define _KEYSYM_LIST  \
    _KEYSYM_(ESC,Escape) \
    _KEYSYM_(BACKSPACE,Backspace)  \
    _KEYSYM_(TAB,Tab)         \
    _KEYSYM_(CLEAR,Clear)     \
    _KEYSYM_(ENTER,Return)    \
    _KEYSYM_(EQUAL,Equal)    \
    _KEYSYM_(PAUSE,Pause)    \
    _KEYSYM_(ESC,Esc)        \
    _KEYSYM_(SPACE,Space)    \
    _KEYSYM_(PLUS,Plus) \
    _KEYSYM_(COMMA,Comma) \
    _KEYSYM_(MINUS,Minus) \
    _KEYSYM_(SLASH,Slash) \
    _KEYSYM1_(0) \
    _KEYSYM1_(1) \
    _KEYSYM1_(2) \
    _KEYSYM1_(3) \
    _KEYSYM1_(4) \
    _KEYSYM1_(5) \
    _KEYSYM1_(6) \
    _KEYSYM1_(7) \
    _KEYSYM1_(8) \
    _KEYSYM1_(9) \
    _KEYSYM1_(SEMICOLON) \
    _KEYSYM1_(QUESTION) \
    _KEYSYM1_(BACKSLASH) \
    _KEYSYM1_(A) \
    _KEYSYM1_(B) \
    _KEYSYM1_(C) \
    _KEYSYM1_(D) \
    _KEYSYM1_(E) \
    _KEYSYM1_(F) \
    _KEYSYM1_(G) \
    _KEYSYM1_(H) \
    _KEYSYM1_(I) \
    _KEYSYM1_(J) \
    _KEYSYM1_(K) \
    _KEYSYM1_(L) \
    _KEYSYM1_(M) \
    _KEYSYM1_(N) \
    _KEYSYM1_(O) \
    _KEYSYM1_(P) \
    _KEYSYM1_(Q) \
    _KEYSYM1_(R) \
    _KEYSYM1_(S) \
    _KEYSYM1_(T) \
    _KEYSYM1_(U) \
    _KEYSYM1_(V) \
    _KEYSYM1_(W) \
    _KEYSYM1_(X) \
    _KEYSYM1_(Y) \
    _KEYSYM1_(Z) \
    _KEYSYM_(COMMA,Comma) \
    _KEYSYM_(KPPLUS,Keypad_Plus)     \
    _KEYSYM_(KPMINUS,Keypad_Minus)    \
    _KEYSYM_(KPASTERISK,Keypad_Multiply) \
    _KEYSYM_(KPSLASH,Keypad_Divide)   \
    _KEYSYM_(KPENTER,Keypad_Enter)    \
    _KEYSYM_(KPDOT,Keypad_Period)   \
    _KEYSYM_(KPEQUAL,Keypad_Equals)   \
    _KEYSYM_(NUMLOCK,NumLock) \
    _KEYSYM_(KP1,Keypad_1)         \
    _KEYSYM_(KP2,Keypad_2)         \
    _KEYSYM_(KP3,Keypad_3)         \
    _KEYSYM_(KP4,Keypad_4)         \
    _KEYSYM_(KP5,Keypad_5)         \
    _KEYSYM_(KP6,Keypad_6)         \
    _KEYSYM_(KP7,Keypad_7)         \
    _KEYSYM_(KP8,Keypad_8)         \
    _KEYSYM_(KP9,Keypad_9)         \
    _KEYSYM_(KP0,Keypad_0)         \
    _KEYSYM_(UP,Up)  \
    _KEYSYM_(DOWN,Down) \
    _KEYSYM_(RIGHT,Right) \
    _KEYSYM_(LEFT,Left) \
    _KEYSYM_(INSERT,Insert) \
    _KEYSYM_(DELETE,Delete) \
    _KEYSYM_(HOME,Home) \
    _KEYSYM_(HOMEPAGE,HomePage) \
    _KEYSYM_(END,End) \
    _KEYSYM_(PAGEUP,PageUp) \
    _KEYSYM_(PAGEDOWN,PageDown) \
    _KEYSYM1_(F1) \
    _KEYSYM1_(F2) \
    _KEYSYM1_(F3) \
    _KEYSYM1_(F4) \
    _KEYSYM1_(F5) \
    _KEYSYM1_(F6) \
    _KEYSYM1_(F7) \
    _KEYSYM1_(F8) \
    _KEYSYM1_(F9) \
    _KEYSYM1_(F10) \
    _KEYSYM1_(F11) \
    _KEYSYM1_(F12) \
    _KEYSYM1_(F13) \
    _KEYSYM1_(F14) \
    _KEYSYM1_(F15) \
    _KEYSYM1_(PRINT) \
    _KEYSYM1_(BREAK) \
    _KEYSYM1_(PLAYPAUSE) \
    _KEYSYM1_(REWIND) \
    _KEYSYM1_(FASTFORWARD) \
    _KEYSYM1_(APPSWITCH) \

#define _KEYSYM_(x,y)   { KEY_##x, #y },
static const struct { int  _sym; const char*  _str; }  keysym_names[] =
{
    _KEYSYM_LIST
};
#undef _KEYSYM_

static const int keysym_names_size =
        (int)(sizeof(keysym_names) / sizeof(keysym_names[0]));

int skin_key_code_count( void )
{
    return keysym_names_size;
}

const char*
skin_key_code_str( int  index )
{
    if (index >= 0 && index < keysym_names_size) {
        return keysym_names[index]._str;
    }
    return NULL;
}

const char* skin_key_pair_to_string(uint32_t keycode, uint32_t mod) {
    static char  temp[32];
    char*        p = temp;
    char*        end = p + sizeof(temp);
    int          nn;

    if ((mod & kKeyModLCtrl) != 0) {
        p = bufprint(p, end, "Ctrl-");
    }
    if ((mod & kKeyModRCtrl) != 0) {
        p = bufprint(p, end, "RCtrl-");
    }
    if ((mod & kKeyModLShift) != 0) {
        p = bufprint(p, end, "Shift-");
    }
    if ((mod & kKeyModRShift) != 0) {
        p = bufprint(p, end, "RShift-");
    }
    if ((mod & kKeyModLAlt) != 0) {
        p = bufprint(p, end, "Alt-");
    }
    if ((mod & kKeyModRAlt) != 0) {
        p = bufprint(p, end, "RAlt-");
    }
    for (nn = 0; nn < keysym_names_size; ++nn) {
        if (keysym_names[nn]._sym == keycode) {
            p = bufprint(p, end, "%s", keysym_names[nn]._str);
            return temp;;
        }
    }

    if (keycode >= 32 && keycode <= 127) {
        p = bufprint(p, end, "%c", (int)keycode);
        return temp;
    }

    return NULL;
}

// Convert a textual key description |str| (e.g. "Ctrl-K") into a pair
// if (SkinKeyCode,SkinKeyMod) values. On success, return true and sets
// |*keycode| and |*mod|. On failure, return false.
bool skin_key_pair_from_string(const char* str,
                               uint32_t* pkeycode,
                               uint32_t* pmod) {
    uint32_t     mod = 0;
    int          match = 1;
    int          nn;
    static const struct { const char*  prefix; int  mod; }  mods[] =
    {
        { "^",      kKeyModLCtrl },
        { "Ctrl",   kKeyModLCtrl },
        { "ctrl",   kKeyModLCtrl },
        { "RCtrl",  kKeyModRCtrl },
        { "rctrl",  kKeyModRCtrl },
        { "Alt",    kKeyModLAlt },
        { "alt",    kKeyModLAlt },
        { "RAlt",   kKeyModRAlt },
        { "ralt",   kKeyModRAlt },
        { "Shift",  kKeyModLShift },
        { "shift",  kKeyModLShift },
        { "RShift", kKeyModRShift },
        { "rshift", kKeyModRShift },
        { NULL, 0 }
    };

    while (match) {
        match = 0;
        for (nn = 0; mods[nn].mod != 0; ++nn) {
            const char*  prefix = mods[nn].prefix;
            int          len    = strlen(prefix);

            if ( !strncmp(str, prefix, len) ) {
                str  += len;
                match = 1;
                mod  |= mods[nn].mod;
                if (str[0] == '-' && str[1] != 0)
                    str++;
                break;
            }
        }
    }

    for (nn = 0; nn < keysym_names_size; ++nn) {
#ifdef _WIN32
        if ( !stricmp(str, keysym_names[nn]._str) )
#else
        if ( !strcasecmp(str, keysym_names[nn]._str) )
#endif
        {
            *pkeycode = keysym_names[nn]._sym;
            *pmod = mod;
            return true;
        }
    }
    return false;
}