ANSI.PAS

{  MIT License

Copyright (c) 2022 Viacheslav Komenda

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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The above copyright notice and this permission notice shall be included in all
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SOFTWARE. }
{$A-,I-,S-,R-,D+,L+,Q-,F-,G-,O-,B-}
UNIT Ansi;

INTERFACE

CONST
ANSI_ESC = CHR($1b);

BLACK    = 0;
RED      = 1;
GREEN    = 2;
YELLOW   = 3;
BLUE     = 4;
MAGENTA  = 5;
CYAN     = 6;
WHITE    = 7;

CLS      = ANSI_ESC + '[2J';
CLREOL   = ANSI_ESC + '[K';

CONST
ansi_enabled : BOOLEAN = TRUE;

FUNCTION fg(clr : BYTE) : STRING;
FUNCTION bg(clr : BYTE) : STRING;

IMPLEMENTATION

USES Detect;

FUNCTION fg(clr : BYTE) : STRING;
BEGIN
        IF ansi_enabled THEN
                fg := ANSI_ESC + '[3' + CHR($30 + (clr mod 8)) + 'm'
        ELSE fg := '';
END;

FUNCTION bg(clr : BYTE) : STRING;
BEGIN
        IF ansi_enabled THEN
                bg := ANSI_ESC + '[4' + CHR($30 + (clr mod 8)) + 'm'
        ELSE bg := '';
END;

BEGIN
        ansi_enabled := IsAnsiSys AND (NOT IsOutputRedirected);
END.