//----------------------------------------------------------------------------//
//                           GNU GPL OS/K                                     //
//                                                                            //
//  Desc:       Terminal-related functions                                    //
//                                                                            //
//                                                                            //
//  Copyright © 2018-2019 The OS/K Team                                       //
//                                                                            //
//  This file is part of OS/K.                                                //
//                                                                            //
//  OS/K 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 3 of the License, or         //
//  any later version.                                                        //
//                                                                            //
//  OS/K 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 OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
//----------------------------------------------------------------------------//

#ifndef _KALKERN_PROC_H
#include <kernel/proc.h>        // for GetCurProc() and Process_t
#endif

#ifndef _KALKERN_TERM_H
#define _KALKERN_TERM_H

//------------------------------------------//

//
// Size of a tabulation in spaces
// Default: 4 spaces/tab
//
enum { KTABSIZE = 4 };

//
// Upper bound on what a single KernLog() can write
//
enum { KLOG_MAX_BUFSIZE = 4096 };

//
// The VGA colors
//
enum TermColor_t
{
    KTERM_COLOR_BLACK,      KTERM_COLOR_BLUE,
    KTERM_COLOR_GREEN,      KTERM_COLOR_CYAN,
    KTERM_COLOR_RED,        KTERM_COLOR_MAGENTA,
    KTERM_COLOR_BROWN,      KTERM_COLOR_LGREY,
    KTERM_COLOR_DARK_GREY,  KTERM_COLOR_LBLUE,
    KTERM_COLOR_LGREEN,     KTERM_COLOR_LCYAN,
    KTERM_COLOR_LRED,       KTERM_COLOR_LMAGENTA,
    KTERM_COLOR_LBROWN,     KTERM_COLOR_WHITE
};

//
//  Terminal structure, right now VGA and output only
//
struct Terminal_t
{
    uint                initDone;
    Lock_t              lock;

    const char         *name;
    const char         *type;

    void               *data;

    size_t              width;
    size_t              height;
    off_t               currentX;
    off_t               currentY;

    uint                tabSize;
    TermColor_t         fgColor;
    TermColor_t         bgColor;

    // Defined in driver
    error_t            (*ClearTermUnlocked)(Terminal_t *);
    error_t            (*PutOnTermUnlocked)(Terminal_t *, char);
    error_t            (*PrintOnTermUnlocked)(Terminal_t *, const char *);
};

//------------------------------------------//

void        InitTerms(void);
error_t     ClearTerm(Terminal_t *);
error_t     PutOnTerm(Terminal_t *, char);
error_t     PrintOnTerm(Terminal_t *, const char *);
error_t     ChTermColor(Terminal_t *, TermColor_t, TermColor_t);

error_t     KernLog(const char *, ...);

//------------------------------------------//

extern Terminal_t         *stdOut;
#define GetStdOut()       (stdOut)
#define SetStdOut(x)      (stdOut = (x))

// Debug purposes
volatile ushort *vga;

//------------------------------------------//

#ifndef _NO_DEBUG

extern Terminal_t          *stdDbg;
#define GetStdDbg()        (stdDbg)
#define SetStdDbg(x)       (stdDbg = (x))

error_t DebugLog(const char *, ...);

#else // _NO_DEBUG

#define GetStdDbg()         NULL
#define SetStdDbg(x)        ((void)0)
#define DebugLog(fmt, ...)  EOK

#endif

//------------------------------------------//

#endif