// Emacs style mode select   -*- C++ -*- 
//-----------------------------------------------------------------------------
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 1993-2008 Raven Software
// Copyright(C) 2008 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// 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.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
//-----------------------------------------------------------------------------

// MN_menu.c

#include <ctype.h>

#include "deh_str.h"
#include "doomdef.h"
#include "doomkeys.h"
#include "i_system.h"
#include "i_swap.h"
#include "m_controls.h"
#include "p_local.h"
#include "r_local.h"
#include "s_sound.h"
#include "v_video.h"

// Macros

#define LEFT_DIR 0
#define RIGHT_DIR 1
#define ITEM_HEIGHT 20
#define SELECTOR_XOFFSET (-28)
#define SELECTOR_YOFFSET (-1)
#define SLOTTEXTLEN     16
#define ASCII_CURSOR '['

// Types

typedef enum
{
    ITT_EMPTY,
    ITT_EFUNC,
    ITT_LRFUNC,
    ITT_SETMENU,
    ITT_INERT
} ItemType_t;

typedef enum
{
    MENU_MAIN,
    MENU_EPISODE,
    MENU_SKILL,
    MENU_OPTIONS,
    MENU_OPTIONS2,
    MENU_FILES,
    MENU_LOAD,
    MENU_SAVE,
    MENU_NONE
} MenuType_t;

typedef struct
{
    ItemType_t type;
    char *text;
    boolean(*func) (int option);
    int option;
    MenuType_t menu;
} MenuItem_t;

typedef struct
{
    int x;
    int y;
    void (*drawFunc) (void);
    int itemCount;
    MenuItem_t *items;
    int oldItPos;
    MenuType_t prevMenu;
} Menu_t;

// Private Functions

static void InitFonts(void);
static void SetMenu(MenuType_t menu);
static boolean SCNetCheck(int option);
static boolean SCQuitGame(int option);
static boolean SCEpisode(int option);
static boolean SCSkill(int option);
static boolean SCMouseSensi(int option);
static boolean SCSfxVolume(int option);
static boolean SCMusicVolume(int option);
static boolean SCScreenSize(int option);
static boolean SCLoadGame(int option);
static boolean SCSaveGame(int option);
static boolean SCMessages(int option);
static boolean SCEndGame(int option);
static boolean SCInfo(int option);
static void DrawMainMenu(void);
static void DrawEpisodeMenu(void);
static void DrawSkillMenu(void);
static void DrawOptionsMenu(void);
static void DrawOptions2Menu(void);
static void DrawFileSlots(Menu_t * menu);
static void DrawFilesMenu(void);
static void MN_DrawInfo(void);
static void DrawLoadMenu(void);
static void DrawSaveMenu(void);
static void DrawSlider(Menu_t * menu, int item, int width, int slot);
void MN_LoadSlotText(void);

// External Data

extern int detailLevel;
extern int screenblocks;

// Public Data

boolean MenuActive;
int InfoType;
boolean messageson;

// Private Data

static int FontABaseLump;
static int FontBBaseLump;
static int SkullBaseLump;
static Menu_t *CurrentMenu;
static int CurrentItPos;
static int MenuEpisode;
static int MenuTime;
static boolean soundchanged;

boolean askforquit;
static int typeofask;
static boolean FileMenuKeySteal;
static boolean slottextloaded;
static char SlotText[6][SLOTTEXTLEN + 2];
static char oldSlotText[SLOTTEXTLEN + 2];
static int SlotStatus[6];
static int slotptr;
static int currentSlot;
static int quicksave;
static int quickload;

static MenuItem_t MainItems[] = {
    {ITT_EFUNC, "NEW GAME", SCNetCheck, 1, MENU_EPISODE},
    {ITT_SETMENU, "OPTIONS", NULL, 0, MENU_OPTIONS},
    {ITT_SETMENU, "GAME FILES", NULL, 0, MENU_FILES},
    {ITT_EFUNC, "INFO", SCInfo, 0, MENU_NONE},
    {ITT_EFUNC, "QUIT GAME", SCQuitGame, 0, MENU_NONE}
};

static Menu_t MainMenu = {
    110, 56,
    DrawMainMenu,
    5, MainItems,
    0,
    MENU_NONE
};

static MenuItem_t EpisodeItems[] = {
    {ITT_EFUNC, "CITY OF THE DAMNED", SCEpisode, 1, MENU_NONE},
    {ITT_EFUNC, "HELL'S MAW", SCEpisode, 2, MENU_NONE},
    {ITT_EFUNC, "THE DOME OF D'SPARIL", SCEpisode, 3, MENU_NONE},
    {ITT_EFUNC, "THE OSSUARY", SCEpisode, 4, MENU_NONE},
    {ITT_EFUNC, "THE STAGNANT DEMESNE", SCEpisode, 5, MENU_NONE}
};

static Menu_t EpisodeMenu = {
    80, 50,
    DrawEpisodeMenu,
    3, EpisodeItems,
    0,
    MENU_MAIN
};

static MenuItem_t FilesItems[] = {
    {ITT_EFUNC, "LOAD GAME", SCNetCheck, 2, MENU_LOAD},
    {ITT_SETMENU, "SAVE GAME", NULL, 0, MENU_SAVE}
};

static Menu_t FilesMenu = {
    110, 60,
    DrawFilesMenu,
    2, FilesItems,
    0,
    MENU_MAIN
};

static MenuItem_t LoadItems[] = {
    {ITT_EFUNC, NULL, SCLoadGame, 0, MENU_NONE},
    {ITT_EFUNC, NULL, SCLoadGame, 1, MENU_NONE},
    {ITT_EFUNC, NULL, SCLoadGame, 2, MENU_NONE},
    {ITT_EFUNC, NULL, SCLoadGame, 3, MENU_NONE},
    {ITT_EFUNC, NULL, SCLoadGame, 4, MENU_NONE},
    {ITT_EFUNC, NULL, SCLoadGame, 5, MENU_NONE}
};

static Menu_t LoadMenu = {
    70, 30,
    DrawLoadMenu,
    6, LoadItems,
    0,
    MENU_FILES
};

static MenuItem_t SaveItems[] = {
    {ITT_EFUNC, NULL, SCSaveGame, 0, MENU_NONE},
    {ITT_EFUNC, NULL, SCSaveGame, 1, MENU_NONE},
    {ITT_EFUNC, NULL, SCSaveGame, 2, MENU_NONE},
    {ITT_EFUNC, NULL, SCSaveGame, 3, MENU_NONE},
    {ITT_EFUNC, NULL, SCSaveGame, 4, MENU_NONE},
    {ITT_EFUNC, NULL, SCSaveGame, 5, MENU_NONE}
};

static Menu_t SaveMenu = {
    70, 30,
    DrawSaveMenu,
    6, SaveItems,
    0,
    MENU_FILES
};

static MenuItem_t SkillItems[] = {
    {ITT_EFUNC, "THOU NEEDETH A WET-NURSE", SCSkill, sk_baby, MENU_NONE},
    {ITT_EFUNC, "YELLOWBELLIES-R-US", SCSkill, sk_easy, MENU_NONE},
    {ITT_EFUNC, "BRINGEST THEM ONETH", SCSkill, sk_medium, MENU_NONE},
    {ITT_EFUNC, "THOU ART A SMITE-MEISTER", SCSkill, sk_hard, MENU_NONE},
    {ITT_EFUNC, "BLACK PLAGUE POSSESSES THEE",
     SCSkill, sk_nightmare, MENU_NONE}
};

static Menu_t SkillMenu = {
    38, 30,
    DrawSkillMenu,
    5, SkillItems,
    2,
    MENU_EPISODE
};

static MenuItem_t OptionsItems[] = {
    {ITT_EFUNC, "END GAME", SCEndGame, 0, MENU_NONE},
    {ITT_EFUNC, "MESSAGES : ", SCMessages, 0, MENU_NONE},
    {ITT_LRFUNC, "MOUSE SENSITIVITY", SCMouseSensi, 0, MENU_NONE},
    {ITT_EMPTY, NULL, NULL, 0, MENU_NONE},
    {ITT_SETMENU, "MORE...", NULL, 0, MENU_OPTIONS2}
};

static Menu_t OptionsMenu = {
    88, 30,
    DrawOptionsMenu,
    5, OptionsItems,
    0,
    MENU_MAIN
};

static MenuItem_t Options2Items[] = {
    {ITT_LRFUNC, "SCREEN SIZE", SCScreenSize, 0, MENU_NONE},
    {ITT_EMPTY, NULL, NULL, 0, MENU_NONE},
    {ITT_LRFUNC, "SFX VOLUME", SCSfxVolume, 0, MENU_NONE},
    {ITT_EMPTY, NULL, NULL, 0, MENU_NONE},
    {ITT_LRFUNC, "MUSIC VOLUME", SCMusicVolume, 0, MENU_NONE},
    {ITT_EMPTY, NULL, NULL, 0, MENU_NONE}
};

static Menu_t Options2Menu = {
    90, 20,
    DrawOptions2Menu,
    6, Options2Items,
    0,
    MENU_OPTIONS
};

static Menu_t *Menus[] = {
    &MainMenu,
    &EpisodeMenu,
    &SkillMenu,
    &OptionsMenu,
    &Options2Menu,
    &FilesMenu,
    &LoadMenu,
    &SaveMenu
};

//---------------------------------------------------------------------------
//
// PROC MN_Init
//
//---------------------------------------------------------------------------

void MN_Init(void)
{
    InitFonts();
    MenuActive = false;
    messageson = true;
    SkullBaseLump = W_GetNumForName(DEH_String("M_SKL00"));

    if (gamemode == retail)
    {                           // Add episodes 4 and 5 to the menu
        EpisodeMenu.itemCount = 5;
        EpisodeMenu.y -= ITEM_HEIGHT;
    }
}

//---------------------------------------------------------------------------
//
// PROC InitFonts
//
//---------------------------------------------------------------------------

static void InitFonts(void)
{
    FontABaseLump = W_GetNumForName(DEH_String("FONTA_S")) + 1;
    FontBBaseLump = W_GetNumForName(DEH_String("FONTB_S")) + 1;
}

//---------------------------------------------------------------------------
//
// PROC MN_DrTextA
//
// Draw text using font A.
//
//---------------------------------------------------------------------------

void MN_DrTextA(char *text, int x, int y)
{
    char c;
    patch_t *p;

    while ((c = *text++) != 0)
    {
        if (c < 33)
        {
            x += 5;
        }
        else
        {
            p = W_CacheLumpNum(FontABaseLump + c - 33, PU_CACHE);
            V_DrawPatch(x, y, p);
            x += SHORT(p->width) - 1;
        }
    }
}

//---------------------------------------------------------------------------
//
// FUNC MN_TextAWidth
//
// Returns the pixel width of a string using font A.
//
//---------------------------------------------------------------------------

int MN_TextAWidth(char *text)
{
    char c;
    int width;
    patch_t *p;

    width = 0;
    while ((c = *text++) != 0)
    {
        if (c < 33)
        {
            width += 5;
        }
        else
        {
            p = W_CacheLumpNum(FontABaseLump + c - 33, PU_CACHE);
            width += SHORT(p->width) - 1;
        }
    }
    return (width);
}

//---------------------------------------------------------------------------
//
// PROC MN_DrTextB
//
// Draw text using font B.
//
//---------------------------------------------------------------------------

void MN_DrTextB(char *text, int x, int y)
{
    char c;
    patch_t *p;

    while ((c = *text++) != 0)
    {
        if (c < 33)
        {
            x += 8;
        }
        else
        {
            p = W_CacheLumpNum(FontBBaseLump + c - 33, PU_CACHE);
            V_DrawPatch(x, y, p);
            x += SHORT(p->width) - 1;
        }
    }
}

//---------------------------------------------------------------------------
//
// FUNC MN_TextBWidth
//
// Returns the pixel width of a string using font B.
//
//---------------------------------------------------------------------------

int MN_TextBWidth(char *text)
{
    char c;
    int width;
    patch_t *p;

    width = 0;
    while ((c = *text++) != 0)
    {
        if (c < 33)
        {
            width += 5;
        }
        else
        {
            p = W_CacheLumpNum(FontBBaseLump + c - 33, PU_CACHE);
            width += SHORT(p->width) - 1;
        }
    }
    return (width);
}

//---------------------------------------------------------------------------
//
// PROC MN_Ticker
//
//---------------------------------------------------------------------------

void MN_Ticker(void)
{
    if (MenuActive == false)
    {
        return;
    }
    MenuTime++;
}

//---------------------------------------------------------------------------
//
// PROC MN_Drawer
//
//---------------------------------------------------------------------------

char *QuitEndMsg[] = {
    "ARE YOU SURE YOU WANT TO QUIT?",
    "ARE YOU SURE YOU WANT TO END THE GAME?",
    "DO YOU WANT TO QUICKSAVE THE GAME NAMED",
    "DO YOU WANT TO QUICKLOAD THE GAME NAMED"
};

void MN_Drawer(void)
{
    int i;
    int x;
    int y;
    MenuItem_t *item;
    char *message;
    char *selName;

    if (MenuActive == false)
    {
        if (askforquit)
        {
            message = DEH_String(QuitEndMsg[typeofask - 1]);

            MN_DrTextA(message, 160 - MN_TextAWidth(message) / 2, 80);
            if (typeofask == 3)
            {
                MN_DrTextA(SlotText[quicksave - 1], 160 -
                           MN_TextAWidth(SlotText[quicksave - 1]) / 2, 90);
                MN_DrTextA(DEH_String("?"), 160 +
                           MN_TextAWidth(SlotText[quicksave - 1]) / 2, 90);
            }
            if (typeofask == 4)
            {
                MN_DrTextA(SlotText[quickload - 1], 160 -
                           MN_TextAWidth(SlotText[quickload - 1]) / 2, 90);
                MN_DrTextA(DEH_String("?"), 160 +
                           MN_TextAWidth(SlotText[quickload - 1]) / 2, 90);
            }
            UpdateState |= I_FULLSCRN;
        }
        return;
    }
    else
    {
        UpdateState |= I_FULLSCRN;
        if (InfoType)
        {
            MN_DrawInfo();
            return;
        }
        if (screenblocks < 10)
        {
            BorderNeedRefresh = true;
        }
        if (CurrentMenu->drawFunc != NULL)
        {
            CurrentMenu->drawFunc();
        }
        x = CurrentMenu->x;
        y = CurrentMenu->y;
        item = CurrentMenu->items;
        for (i = 0; i < CurrentMenu->itemCount; i++)
        {
            if (item->type != ITT_EMPTY && item->text)
            {
                MN_DrTextB(DEH_String(item->text), x, y);
            }
            y += ITEM_HEIGHT;
            item++;
        }
        y = CurrentMenu->y + (CurrentItPos * ITEM_HEIGHT) + SELECTOR_YOFFSET;
        selName = DEH_String(MenuTime & 16 ? "M_SLCTR1" : "M_SLCTR2");
        V_DrawPatch(x + SELECTOR_XOFFSET, y,
                    W_CacheLumpName(selName, PU_CACHE));
    }
}

//---------------------------------------------------------------------------
//
// PROC DrawMainMenu
//
//---------------------------------------------------------------------------

static void DrawMainMenu(void)
{
    int frame;

    frame = (MenuTime / 3) % 18;
    V_DrawPatch(88, 0, W_CacheLumpName(DEH_String("M_HTIC"), PU_CACHE));
    V_DrawPatch(40, 10, W_CacheLumpNum(SkullBaseLump + (17 - frame),
                                       PU_CACHE));
    V_DrawPatch(232, 10, W_CacheLumpNum(SkullBaseLump + frame, PU_CACHE));
}

//---------------------------------------------------------------------------
//
// PROC DrawEpisodeMenu
//
//---------------------------------------------------------------------------

static void DrawEpisodeMenu(void)
{
}

//---------------------------------------------------------------------------
//
// PROC DrawSkillMenu
//
//---------------------------------------------------------------------------

static void DrawSkillMenu(void)
{
}

//---------------------------------------------------------------------------
//
// PROC DrawFilesMenu
//
//---------------------------------------------------------------------------

static void DrawFilesMenu(void)
{
// clear out the quicksave/quickload stuff
    quicksave = 0;
    quickload = 0;
    players[consoleplayer].message = NULL;
    players[consoleplayer].messageTics = 1;
}

//---------------------------------------------------------------------------
//
// PROC DrawLoadMenu
//
//---------------------------------------------------------------------------

static void DrawLoadMenu(void)
{
    char *title;

    title = DEH_String("LOAD GAME");

    MN_DrTextB(title, 160 - MN_TextBWidth(title) / 2, 10);
    if (!slottextloaded)
    {
        MN_LoadSlotText();
    }
    DrawFileSlots(&LoadMenu);
}

//---------------------------------------------------------------------------
//
// PROC DrawSaveMenu
//
//---------------------------------------------------------------------------

static void DrawSaveMenu(void)
{
    char *title;

    title = DEH_String("SAVE GAME");

    MN_DrTextB(title, 160 - MN_TextBWidth(title) / 2, 10);
    if (!slottextloaded)
    {
        MN_LoadSlotText();
    }
    DrawFileSlots(&SaveMenu);
}

//===========================================================================
//
// MN_LoadSlotText
//
//              Loads in the text message for each slot
//===========================================================================

void MN_LoadSlotText(void)
{
    FILE *fp;
    int i;
    char *filename;

    for (i = 0; i < 6; i++)
    {
        filename = SV_Filename(i);
        fp = fopen(filename, "rb+");
	free(filename);

        if (!fp)
        {
            SlotText[i][0] = 0; // empty the string
            SlotStatus[i] = 0;
            continue;
        }
        fread(&SlotText[i], SLOTTEXTLEN, 1, fp);
        fclose(fp);
        SlotStatus[i] = 1;
    }
    slottextloaded = true;
}

//---------------------------------------------------------------------------
//
// PROC DrawFileSlots
//
//---------------------------------------------------------------------------

static void DrawFileSlots(Menu_t * menu)
{
    int i;
    int x;
    int y;

    x = menu->x;
    y = menu->y;
    for (i = 0; i < 6; i++)
    {
        V_DrawPatch(x, y, W_CacheLumpName(DEH_String("M_FSLOT"), PU_CACHE));
        if (SlotStatus[i])
        {
            MN_DrTextA(SlotText[i], x + 5, y + 5);
        }
        y += ITEM_HEIGHT;
    }
}

//---------------------------------------------------------------------------
//
// PROC DrawOptionsMenu
//
//---------------------------------------------------------------------------

static void DrawOptionsMenu(void)
{
    if (messageson)
    {
        MN_DrTextB(DEH_String("ON"), 196, 50);
    }
    else
    {
        MN_DrTextB(DEH_String("OFF"), 196, 50);
    }
    DrawSlider(&OptionsMenu, 3, 10, mouseSensitivity);
}

//---------------------------------------------------------------------------
//
// PROC DrawOptions2Menu
//
//---------------------------------------------------------------------------

static void DrawOptions2Menu(void)
{
    DrawSlider(&Options2Menu, 1, 9, screenblocks - 3);
    DrawSlider(&Options2Menu, 3, 16, snd_MaxVolume);
    DrawSlider(&Options2Menu, 5, 16, snd_MusicVolume);
}

//---------------------------------------------------------------------------
//
// PROC SCNetCheck
//
//---------------------------------------------------------------------------

static boolean SCNetCheck(int option)
{
    if (!netgame)
    {                           // okay to go into the menu
        return true;
    }
    switch (option)
    {
        case 1:
            P_SetMessage(&players[consoleplayer],
                         "YOU CAN'T START A NEW GAME IN NETPLAY!", true);
            break;
        case 2:
            P_SetMessage(&players[consoleplayer],
                         "YOU CAN'T LOAD A GAME IN NETPLAY!", true);
            break;
        default:
            break;
    }
    MenuActive = false;
    return false;
}

//---------------------------------------------------------------------------
//
// PROC SCQuitGame
//
//---------------------------------------------------------------------------

static boolean SCQuitGame(int option)
{
    MenuActive = false;
    askforquit = true;
    typeofask = 1;              //quit game
    if (!netgame && !demoplayback)
    {
        paused = true;
    }
    return true;
}

//---------------------------------------------------------------------------
//
// PROC SCEndGame
//
//---------------------------------------------------------------------------

static boolean SCEndGame(int option)
{
    if (demoplayback || netgame)
    {
        return false;
    }
    MenuActive = false;
    askforquit = true;
    typeofask = 2;              //endgame
    if (!netgame && !demoplayback)
    {
        paused = true;
    }
    return true;
}

//---------------------------------------------------------------------------
//
// PROC SCMessages
//
//---------------------------------------------------------------------------

static boolean SCMessages(int option)
{
    messageson ^= 1;
    if (messageson)
    {
        P_SetMessage(&players[consoleplayer], DEH_String("MESSAGES ON"), true);
    }
    else
    {
        P_SetMessage(&players[consoleplayer], DEH_String("MESSAGES OFF"), true);
    }
    S_StartSound(NULL, sfx_chat);
    return true;
}

//---------------------------------------------------------------------------
//
// PROC SCLoadGame
//
//---------------------------------------------------------------------------

static boolean SCLoadGame(int option)
{
    char *filename;

    if (!SlotStatus[option])
    {                           // slot's empty...don't try and load
        return false;
    }

    filename = SV_Filename(option);
    G_LoadGame(filename);
    free(filename);

    MN_DeactivateMenu();
    BorderNeedRefresh = true;
    if (quickload == -1)
    {
        quickload = option + 1;
        players[consoleplayer].message = NULL;
        players[consoleplayer].messageTics = 1;
    }
    return true;
}

//---------------------------------------------------------------------------
//
// PROC SCSaveGame
//
//---------------------------------------------------------------------------

static boolean SCSaveGame(int option)
{
    char *ptr;

    if (!FileMenuKeySteal)
    {
        FileMenuKeySteal = true;
        strcpy(oldSlotText, SlotText[option]);
        ptr = SlotText[option];
        while (*ptr)
        {
            ptr++;
        }
        *ptr = '[';
        *(ptr + 1) = 0;
        SlotStatus[option]++;
        currentSlot = option;
        slotptr = ptr - SlotText[option];
        return false;
    }
    else
    {
        G_SaveGame(option, SlotText[option]);
        FileMenuKeySteal = false;
        MN_DeactivateMenu();
    }
    BorderNeedRefresh = true;
    if (quicksave == -1)
    {
        quicksave = option + 1;
        players[consoleplayer].message = NULL;
        players[consoleplayer].messageTics = 1;
    }
    return true;
}

//---------------------------------------------------------------------------
//
// PROC SCEpisode
//
//---------------------------------------------------------------------------

static boolean SCEpisode(int option)
{
    if (gamemode == shareware && option > 1)
    {
        P_SetMessage(&players[consoleplayer],
                     "ONLY AVAILABLE IN THE REGISTERED VERSION", true);
    }
    else
    {
        MenuEpisode = option;
        SetMenu(MENU_SKILL);
    }
    return true;
}

//---------------------------------------------------------------------------
//
// PROC SCSkill
//
//---------------------------------------------------------------------------

static boolean SCSkill(int option)
{
    G_DeferedInitNew(option, MenuEpisode, 1);
    MN_DeactivateMenu();
    return true;
}

//---------------------------------------------------------------------------
//
// PROC SCMouseSensi
//
//---------------------------------------------------------------------------

static boolean SCMouseSensi(int option)
{
    if (option == RIGHT_DIR)
    {
        if (mouseSensitivity < 9)
        {
            mouseSensitivity++;
        }
    }
    else if (mouseSensitivity)
    {
        mouseSensitivity--;
    }
    return true;
}

//---------------------------------------------------------------------------
//
// PROC SCSfxVolume
//
//---------------------------------------------------------------------------

static boolean SCSfxVolume(int option)
{
    if (option == RIGHT_DIR)
    {
        if (snd_MaxVolume < 15)
        {
            snd_MaxVolume++;
        }
    }
    else if (snd_MaxVolume)
    {
        snd_MaxVolume--;
    }
    S_SetMaxVolume(false);      // don't recalc the sound curve, yet
    soundchanged = true;        // we'll set it when we leave the menu
    return true;
}

//---------------------------------------------------------------------------
//
// PROC SCMusicVolume
//
//---------------------------------------------------------------------------

static boolean SCMusicVolume(int option)
{
    if (option == RIGHT_DIR)
    {
        if (snd_MusicVolume < 15)
        {
            snd_MusicVolume++;
        }
    }
    else if (snd_MusicVolume)
    {
        snd_MusicVolume--;
    }
    S_SetMusicVolume();
    return true;
}

//---------------------------------------------------------------------------
//
// PROC SCScreenSize
//
//---------------------------------------------------------------------------

static boolean SCScreenSize(int option)
{
    if (option == RIGHT_DIR)
    {
        if (screenblocks < 11)
        {
            screenblocks++;
        }
    }
    else if (screenblocks > 3)
    {
        screenblocks--;
    }
    R_SetViewSize(screenblocks, detailLevel);
    return true;
}

//---------------------------------------------------------------------------
//
// PROC SCInfo
//
//---------------------------------------------------------------------------

static boolean SCInfo(int option)
{
    InfoType = 1;
    S_StartSound(NULL, sfx_dorcls);
    if (!netgame && !demoplayback)
    {
        paused = true;
    }
    return true;
}

//---------------------------------------------------------------------------
//
// FUNC MN_Responder
//
//---------------------------------------------------------------------------

boolean MN_Responder(event_t * event)
{
    int charTyped;
    int key;
    int i;
    MenuItem_t *item;
    extern boolean automapactive;
    extern void D_StartTitle(void);
    extern void G_CheckDemoStatus(void);
    char *textBuffer;

    // In testcontrols mode, none of the function keys should do anything
    // - the only key is escape to quit.

    if (testcontrols)
    {
        if (event->type == ev_quit
         || (event->type == ev_keydown
          && (event->data1 == key_menu_activate
           || event->data1 == key_menu_quit)))
        {
            I_Quit();
            return true;
        }

        return false;
    }

    // "close" button pressed on window?
    if (event->type == ev_quit)
    {
        // First click on close = bring up quit confirm message.
        // Second click = confirm quit.

        if (!MenuActive && askforquit && typeofask == 1)
        {
            G_CheckDemoStatus();
            I_Quit();
        }
        else
        {
            SCQuitGame(0);
            S_StartSound(NULL, sfx_chat);
        }
        return true;
    }

    if (event->type != ev_keydown)
    {
        return false;
    }

    key = event->data1;
    charTyped = event->data2;

    if (InfoType)
    {
        if (gamemode == shareware)
        {
            InfoType = (InfoType + 1) % 5;
        }
        else
        {
            InfoType = (InfoType + 1) % 4;
        }
        if (key == KEY_ESCAPE)
        {
            InfoType = 0;
        }
        if (!InfoType)
        {
            paused = false;
            MN_DeactivateMenu();
            SB_state = -1;      //refresh the statbar
            BorderNeedRefresh = true;
        }
        S_StartSound(NULL, sfx_dorcls);
        return (true);          //make the info screen eat the keypress
    }

    if (ravpic && key == KEY_F1)
    {
        G_ScreenShot();
        return (true);
    }

    if (askforquit)
    {
        if (key == key_menu_confirm)
        {
            switch (typeofask)
            {
                case 1:
                    G_CheckDemoStatus();
                    I_Quit();
                    return false;

                case 2:
                    players[consoleplayer].messageTics = 0;
                    //set the msg to be cleared
                    players[consoleplayer].message = NULL;
                    paused = false;
                    I_SetPalette(W_CacheLumpName
                                 ("PLAYPAL", PU_CACHE));
                    D_StartTitle();     // go to intro/demo mode.
                    break;

                case 3:
                    P_SetMessage(&players[consoleplayer],
                                 "QUICKSAVING....", false);
                    FileMenuKeySteal = true;
                    SCSaveGame(quicksave - 1);
                    BorderNeedRefresh = true;
                    break;

                case 4:
                    P_SetMessage(&players[consoleplayer],
                                 "QUICKLOADING....", false);
                    SCLoadGame(quickload - 1);
                    BorderNeedRefresh = true;
                    break;

                default:
                    break;
            }

            askforquit = false;
            typeofask = 0;

            return true;
        }
        else if (key == key_menu_abort || key == KEY_ESCAPE)
        {
            players[consoleplayer].messageTics = 1;  //set the msg to be cleared
            askforquit = false;
            typeofask = 0;
            paused = false;
            UpdateState |= I_FULLSCRN;
            BorderNeedRefresh = true;
            return true;
        }

        return false;           // don't let the keys filter thru
    }

    if (!MenuActive && !chatmodeon)
    {
        if (key == key_menu_decscreen)
        {
            if (automapactive)
            {               // Don't screen size in automap
                return (false);
            }
            SCScreenSize(LEFT_DIR);
            S_StartSound(NULL, sfx_keyup);
            BorderNeedRefresh = true;
            UpdateState |= I_FULLSCRN;
            return (true);
        }
        else if (key == key_menu_incscreen)
        {
            if (automapactive)
            {               // Don't screen size in automap
                return (false);
            }
            SCScreenSize(RIGHT_DIR);
            S_StartSound(NULL, sfx_keyup);
            BorderNeedRefresh = true;
            UpdateState |= I_FULLSCRN;
            return (true);
        }
        else if (key == key_menu_help)           // F1
        {
            SCInfo(0);      // start up info screens
            MenuActive = true;
            return (true);
        }
        else if (key == key_menu_save)           // F2 (save game)
        {
            if (gamestate == GS_LEVEL && !demoplayback)
            {
                MenuActive = true;
                FileMenuKeySteal = false;
                MenuTime = 0;
                CurrentMenu = &SaveMenu;
                CurrentItPos = CurrentMenu->oldItPos;
                if (!netgame && !demoplayback)
                {
                    paused = true;
                }
                S_StartSound(NULL, sfx_dorcls);
                slottextloaded = false;     //reload the slot text, when needed
            }
            return true;
        }
        else if (key == key_menu_load)           // F3 (load game)
        {
            if (SCNetCheck(2))
            {
                MenuActive = true;
                FileMenuKeySteal = false;
                MenuTime = 0;
                CurrentMenu = &LoadMenu;
                CurrentItPos = CurrentMenu->oldItPos;
                if (!netgame && !demoplayback)
                {
                    paused = true;
                }
                S_StartSound(NULL, sfx_dorcls);
                slottextloaded = false;     //reload the slot text, when needed
            }
            return true;
        }
        else if (key == key_menu_volume)         // F4 (volume)
        {
            MenuActive = true;
            FileMenuKeySteal = false;
            MenuTime = 0;
            CurrentMenu = &Options2Menu;
            CurrentItPos = CurrentMenu->oldItPos;
            if (!netgame && !demoplayback)
            {
                paused = true;
            }
            S_StartSound(NULL, sfx_dorcls);
            slottextloaded = false; //reload the slot text, when needed
            return true;
        }
        else if (key == key_menu_detail)          // F5 (detail)
        {
            // F5 isn't used in Heretic. (detail level)
            return true;
        }
        else if (key == key_menu_qsave)           // F6 (quicksave)
        {
            if (gamestate == GS_LEVEL && !demoplayback)
            {
                if (!quicksave || quicksave == -1)
                {
                    MenuActive = true;
                    FileMenuKeySteal = false;
                    MenuTime = 0;
                    CurrentMenu = &SaveMenu;
                    CurrentItPos = CurrentMenu->oldItPos;
                    if (!netgame && !demoplayback)
                    {
                        paused = true;
                    }
                    S_StartSound(NULL, sfx_dorcls);
                    slottextloaded = false; //reload the slot text, when needed
                    quicksave = -1;
                    P_SetMessage(&players[consoleplayer],
                                 "CHOOSE A QUICKSAVE SLOT", true);
                }
                else
                {
                    askforquit = true;
                    typeofask = 3;
                    if (!netgame && !demoplayback)
                    {
                        paused = true;
                    }
                    S_StartSound(NULL, sfx_chat);
                }
            }
            return true;
        }
        else if (key == key_menu_endgame)         // F7 (end game)
        {
            if (gamestate == GS_LEVEL && !demoplayback)
            {
                S_StartSound(NULL, sfx_chat);
                SCEndGame(0);
            }
            return true;
        }
        else if (key == key_menu_messages)        // F8 (toggle messages)
        {
            SCMessages(0);
            return true;
        }
        else if (key == key_menu_qload)           // F9 (quickload)
        {
            if (!quickload || quickload == -1)
            {
                MenuActive = true;
                FileMenuKeySteal = false;
                MenuTime = 0;
                CurrentMenu = &LoadMenu;
                CurrentItPos = CurrentMenu->oldItPos;
                if (!netgame && !demoplayback)
                {
                    paused = true;
                }
                S_StartSound(NULL, sfx_dorcls);
                slottextloaded = false;     //reload the slot text, when needed
                quickload = -1;
                P_SetMessage(&players[consoleplayer],
                             "CHOOSE A QUICKLOAD SLOT", true);
            }
            else
            {
                askforquit = true;
                if (!netgame && !demoplayback)
                {
                    paused = true;
                }
                typeofask = 4;
                S_StartSound(NULL, sfx_chat);
            }
            return true;
        }
        else if (key == key_menu_quit)            // F10 (quit)
        {
            if (gamestate == GS_LEVEL)
            {
                SCQuitGame(0);
                S_StartSound(NULL, sfx_chat);
            }
            return true;
        }
        else if (key == key_menu_gamma)           // F11 (gamma correction)
        {
            usegamma++;
            if (usegamma > 4)
            {
                usegamma = 0;
            }
            I_SetPalette((byte *) W_CacheLumpName("PLAYPAL", PU_CACHE));
            return true;
        }

    }

    if (!MenuActive)
    {
        if (key == key_menu_activate || gamestate == GS_DEMOSCREEN || demoplayback)
        {
            MN_ActivateMenu();
            return (true);
        }
        return (false);
    }
    if (!FileMenuKeySteal)
    {
        item = &CurrentMenu->items[CurrentItPos];

        if (key == key_menu_down)            // Next menu item
        {
            do
            {
                if (CurrentItPos + 1 > CurrentMenu->itemCount - 1)
                {
                    CurrentItPos = 0;
                }
                else
                {
                    CurrentItPos++;
                }
            }
            while (CurrentMenu->items[CurrentItPos].type == ITT_EMPTY);
            S_StartSound(NULL, sfx_switch);
            return (true);
        }
        else if (key == key_menu_up)         // Previous menu item
        {
            do
            {
                if (CurrentItPos == 0)
                {
                    CurrentItPos = CurrentMenu->itemCount - 1;
                }
                else
                {
                    CurrentItPos--;
                }
            }
            while (CurrentMenu->items[CurrentItPos].type == ITT_EMPTY);
            S_StartSound(NULL, sfx_switch);
            return (true);
        }
        else if (key == key_menu_left)       // Slider left
        {
            if (item->type == ITT_LRFUNC && item->func != NULL)
            {
                item->func(LEFT_DIR);
                S_StartSound(NULL, sfx_keyup);
            }
            return (true);
        }
        else if (key == key_menu_right)      // Slider right
        {
            if (item->type == ITT_LRFUNC && item->func != NULL)
            {
                item->func(RIGHT_DIR);
                S_StartSound(NULL, sfx_keyup);
            }
            return (true);
        }
        else if (key == key_menu_forward)    // Activate item (enter)
        {
            if (item->type == ITT_SETMENU)
            {
                SetMenu(item->menu);
            }
            else if (item->func != NULL)
            {
                CurrentMenu->oldItPos = CurrentItPos;
                if (item->type == ITT_LRFUNC)
                {
                    item->func(RIGHT_DIR);
                }
                else if (item->type == ITT_EFUNC)
                {
                    if (item->func(item->option))
                    {
                        if (item->menu != MENU_NONE)
                        {
                            SetMenu(item->menu);
                        }
                    }
                }
            }
            S_StartSound(NULL, sfx_dorcls);
            return (true);
        }
        else if (key == key_menu_activate)     // Toggle menu
        {
            MN_DeactivateMenu();
            return (true);
        }
        else if (key == key_menu_back)         // Go back to previous menu
        {
            S_StartSound(NULL, sfx_switch);
            if (CurrentMenu->prevMenu == MENU_NONE)
            {
                MN_DeactivateMenu();
            }
            else
            {
                SetMenu(CurrentMenu->prevMenu);
            }
            return (true);
        }
        else if (charTyped != 0)
        {
            // Jump to menu item based on first letter:

            for (i = 0; i < CurrentMenu->itemCount; i++)
            {
                if (CurrentMenu->items[i].text)
                {
                    if (toupper(charTyped)
                        == toupper(DEH_String(CurrentMenu->items[i].text)[0]))
                    {
                        CurrentItPos = i;
                        return (true);
                    }
                }
            }
        }

        return (false);
    }
    else
    {                           // Editing file names
        textBuffer = &SlotText[currentSlot][slotptr];
        if (key == KEY_BACKSPACE)
        {
            if (slotptr)
            {
                *textBuffer-- = 0;
                *textBuffer = ASCII_CURSOR;
                slotptr--;
            }
            return (true);
        }
        if (key == KEY_ESCAPE)
        {
            memset(SlotText[currentSlot], 0, SLOTTEXTLEN + 2);
            strcpy(SlotText[currentSlot], oldSlotText);
            SlotStatus[currentSlot]--;
            MN_DeactivateMenu();
            return (true);
        }
        if (key == KEY_ENTER)
        {
            SlotText[currentSlot][slotptr] = 0; // clear the cursor
            item = &CurrentMenu->items[CurrentItPos];
            CurrentMenu->oldItPos = CurrentItPos;
            if (item->type == ITT_EFUNC)
            {
                item->func(item->option);
                if (item->menu != MENU_NONE)
                {
                    SetMenu(item->menu);
                }
            }
            return (true);
        }
        if (slotptr < SLOTTEXTLEN && key != KEY_BACKSPACE)
        {
            if (isalpha(charTyped))
            {
                *textBuffer++ = toupper(charTyped);
                *textBuffer = ASCII_CURSOR;
                slotptr++;
                return (true);
            }
            if (isdigit(charTyped) || charTyped == ' '
              || charTyped == ',' || charTyped == '.' || charTyped == '-'
              || charTyped == '!')
            {
                *textBuffer++ = charTyped;
                *textBuffer = ASCII_CURSOR;
                slotptr++;
                return (true);
            }
        }
        return (true);
    }
    return (false);
}

//---------------------------------------------------------------------------
//
// PROC MN_ActivateMenu
//
//---------------------------------------------------------------------------

void MN_ActivateMenu(void)
{
    if (MenuActive)
    {
        return;
    }
    if (paused)
    {
        S_ResumeSound();
    }
    MenuActive = true;
    FileMenuKeySteal = false;
    MenuTime = 0;
    CurrentMenu = &MainMenu;
    CurrentItPos = CurrentMenu->oldItPos;
    if (!netgame && !demoplayback)
    {
        paused = true;
    }
    S_StartSound(NULL, sfx_dorcls);
    slottextloaded = false;     //reload the slot text, when needed
}

//---------------------------------------------------------------------------
//
// PROC MN_DeactivateMenu
//
//---------------------------------------------------------------------------

void MN_DeactivateMenu(void)
{
    if (CurrentMenu != NULL)
    {
        CurrentMenu->oldItPos = CurrentItPos;
    }
    MenuActive = false;
    if (!netgame)
    {
        paused = false;
    }
    S_StartSound(NULL, sfx_dorcls);
    if (soundchanged)
    {
        S_SetMaxVolume(true);   //recalc the sound curve
        soundchanged = false;
    }
    players[consoleplayer].message = NULL;
    players[consoleplayer].messageTics = 1;
}

//---------------------------------------------------------------------------
//
// PROC MN_DrawInfo
//
//---------------------------------------------------------------------------

void MN_DrawInfo(void)
{
    I_SetPalette(W_CacheLumpName("PLAYPAL", PU_CACHE));
    V_DrawRawScreen(W_CacheLumpNum(W_GetNumForName("TITLE") + InfoType,
                                   PU_CACHE));
//      V_DrawPatch(0, 0, W_CacheLumpNum(W_GetNumForName("TITLE")+InfoType,
//              PU_CACHE));
}


//---------------------------------------------------------------------------
//
// PROC SetMenu
//
//---------------------------------------------------------------------------

static void SetMenu(MenuType_t menu)
{
    CurrentMenu->oldItPos = CurrentItPos;
    CurrentMenu = Menus[menu];
    CurrentItPos = CurrentMenu->oldItPos;
}

//---------------------------------------------------------------------------
//
// PROC DrawSlider
//
//---------------------------------------------------------------------------

static void DrawSlider(Menu_t * menu, int item, int width, int slot)
{
    int x;
    int y;
    int x2;
    int count;

    x = menu->x + 24;
    y = menu->y + 2 + (item * ITEM_HEIGHT);
    V_DrawPatch(x - 32, y, W_CacheLumpName(DEH_String("M_SLDLT"), PU_CACHE));
    for (x2 = x, count = width; count--; x2 += 8)
    {
        V_DrawPatch(x2, y, W_CacheLumpName(DEH_String(count & 1 ? "M_SLDMD1"
                                           : "M_SLDMD2"), PU_CACHE));
    }
    V_DrawPatch(x2, y, W_CacheLumpName(DEH_String("M_SLDRT"), PU_CACHE));
    V_DrawPatch(x + 4 + slot * 8, y + 7,
                W_CacheLumpName(DEH_String("M_SLDKB"), PU_CACHE));
}
