File:  [gforth] / gforth / ansi.fs
Revision 1.10: download - view: text, annotated - select for diffs
Mon Dec 31 19:02:24 2007 UTC (11 years, 7 months ago) by anton
Branches: MAIN
CVS tags: v0-7-0, HEAD
updated copyright year after changing license notice

    1: \ ansi.fs      Define terminal attributes              20may93jaw
    2: 
    3: \ Copyright (C) 1995,1996,1997,1998,2001,2003,2007 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 3
   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, see http://www.gnu.org/licenses/.
   19: 
   20: 
   21: \ If you want another terminal you can redefine the colours.
   22: 
   23: \ But a better way is it only to redefine SET-ATTR
   24: \ to have compatible colours.
   25: 
   26: \ Attributes description:
   27: \ <A ( -- -1 0 )           Start attributes description
   28: \ A> ( -1 x .. x -- attr ) Terminate an attributes description and
   29: \                          return overall attribute; currently only
   30: \                          12 bits are used.
   31: \
   32: \ >BG ( colour -- x )      x is attribute with colour as Background colour
   33: \ >FG ( colour -- x )      x is attribute with colour as Foreground colour
   34: \
   35: \ SET-ATTR ( attr -- )     Send attributes to terminal
   36: \
   37: \ BG> ( attr -- colour)    extract colour of Background from attr
   38: \ FG> ( attr -- colour)    extract colour of Foreground from attr
   39: \
   40: \ See colorize.fs for an example of usage.
   41: 
   42: \ To do:        Make <A A> State smart and only compile literals!
   43: 
   44: needs vt100.fs
   45: 
   46: decimal
   47: 
   48: 0 CONSTANT Black
   49: 1 CONSTANT Red
   50: 2 CONSTANT Green
   51: 3 CONSTANT Yellow
   52: 4 CONSTANT Blue
   53: 5 CONSTANT Brown
   54: 6 CONSTANT Cyan
   55: 7 CONSTANT White
   56: 
   57: 1 CONSTANT Bold
   58: 2 CONSTANT Underline
   59: 4 CONSTANT Blink
   60: 8 CONSTANT Invers
   61: 
   62: \ For portable programs don't use invers and underline
   63: 
   64: : >BG    4 lshift ;
   65: : >FG    >BG >BG ;
   66: 
   67: : BG>    4 rshift 15 and ;
   68: : FG>    8 rshift 15 and ;
   69: 
   70: : <A    -1 0 ;
   71: : A>    BEGIN over -1 <> WHILE or REPEAT nip ;
   72: 
   73: VARIABLE Attr   -1 Attr !
   74: 
   75: DEFER Attr!
   76: 
   77: : (Attr!)       ( attr -- ) dup Attr @ = IF drop EXIT THEN
   78:                 dup Attr !
   79:                 ESC[    0 pn
   80:                         dup FG> ?dup IF 30 + ;pn THEN
   81:                         dup BG> ?dup IF 40 + ;pn THEN
   82:                         dup Bold and IF 1 ;pn THEN
   83:                         dup Underline and IF 4 ;pn THEN
   84:                         dup Blink and IF 5 ;pn THEN
   85:                         Invers and IF 7 ;pn THEN
   86:                         [char] m emit ;
   87: 
   88: ' (Attr!) IS Attr!
   89: 
   90: : BlackSpace    Attr @ dup BG> Black =
   91:                 IF drop space
   92:                 ELSE 0 attr! space attr! THEN ;
   93: 

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