File:  [gforth] / gforth / ansi.fs
Revision 1.7: download - view: text, annotated - select for diffs
Sun Mar 9 15:16:45 2003 UTC (16 years, 8 months ago) by anton
Branches: MAIN
CVS tags: v0-6-1, v0-6-0, HEAD
updated copyright years

    1: \ ansi.fs      Define terminal attributes              20may93jaw
    2: 
    3: \ Copyright (C) 1995,1996,1997,1998,2001 Free Software Foundation, Inc.
    4: 
    5: \ This file is part of Gforth.
    6: 
    7: \ Gforth is free software; you can redistribute it and/or
    8: \ modify it under the terms of the GNU General Public License
    9: \ as published by the Free Software Foundation; either version 2
   10: \ of the License, or (at your option) any later version.
   11: 
   12: \ This program is distributed in the hope that it will be useful,
   13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
   14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   15: \ GNU General Public License for more details.
   16: 
   17: \ You should have received a copy of the GNU General Public License
   18: \ along with this program; if not, write to the Free Software
   19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   20: 
   21: 
   22: \ If you want another terminal you can redefine the colours.
   23: 
   24: \ But a better way is it only to redefine SET-ATTR
   25: \ to have compatible colours.
   26: 
   27: \ Attributes description:
   28: \ <A ( -- -1 0 )           Start attributes description
   29: \ A> ( -1 x .. x -- attr ) Terminate an attributes description and
   30: \                          return overall attribute; currently only
   31: \                          12 bits are used.
   32: \
   33: \ >BG ( colour -- x )      x is attribute with colour as Background colour
   34: \ >FG ( colour -- x )      x is attribute with colour as Foreground colour
   35: \
   36: \ SET-ATTR ( attr -- )     Send attributes to terminal
   37: \
   38: \ BG> ( attr -- colour)    extract colour of Background from attr
   39: \ FG> ( attr -- colour)    extract colour of Foreground from attr
   40: \
   41: \ See colorize.fs for an example of usage.
   42: 
   43: \ To do:        Make <A A> State smart and only compile literals!
   44: 
   45: needs vt100.fs
   46: 
   47: decimal
   48: 
   49: 0 CONSTANT Black
   50: 1 CONSTANT Red
   51: 2 CONSTANT Green
   52: 3 CONSTANT Yellow
   53: 4 CONSTANT Blue
   54: 5 CONSTANT Brown
   55: 6 CONSTANT Cyan
   56: 7 CONSTANT White
   57: 
   58: 1 CONSTANT Bold
   59: 2 CONSTANT Underline
   60: 4 CONSTANT Blink
   61: 8 CONSTANT Invers
   62: 
   63: \ For portable programs don't use invers and underline
   64: 
   65: : >BG    4 lshift ;
   66: : >FG    >BG >BG ;
   67: 
   68: : BG>    4 rshift 15 and ;
   69: : FG>    8 rshift 15 and ;
   70: 
   71: : <A    -1 0 ;
   72: : A>    BEGIN over -1 <> WHILE or REPEAT nip ;
   73: 
   74: VARIABLE Attr   -1 Attr !
   75: 
   76: DEFER Attr!
   77: 
   78: : (Attr!)       ( attr -- ) dup Attr @ = IF drop EXIT THEN
   79:                 dup Attr !
   80:                 ESC[    0 pn
   81:                         dup FG> ?dup IF 30 + ;pn THEN
   82:                         dup BG> ?dup IF 40 + ;pn THEN
   83:                         dup Bold and IF 1 ;pn THEN
   84:                         dup Underline and IF 4 ;pn THEN
   85:                         dup Blink and IF 5 ;pn THEN
   86:                         Invers and IF 7 ;pn THEN
   87:                         [char] m emit ;
   88: 
   89: ' (Attr!) IS Attr!
   90: 
   91: : BlackSpace    Attr @ dup BG> Black =
   92:                 IF drop space
   93:                 ELSE 0 attr! space attr! THEN ;
   94: 

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