\ ansi.fs Define terminal attributes 20may93jaw
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\ This file is part of Gforth.
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\ modify it under the terms of the GNU General Public License
\ as published by the Free Software Foundation; either version 2
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\ but WITHOUT ANY WARRANTY; without even the implied warranty of
\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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\ along with this program; if not, write to the Free Software
\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
\ If you want another terminal you can redefine the colours.
\ But a better way is it only to redefine SET-ATTR
\ to have compatible colours.
\ Attributes description:
\ <A ( -- -1 0 ) Start attributes description
\ A> ( -1 x .. x -- attr ) Terminate an attributes description and
\ return overall attribute; currently only
\ 12 bits are used.
\ >BG ( colour -- x ) x is attribute with colour as Background colour
\ >FG ( colour -- x ) x is attribute with colour as Foreground colour
\ SET-ATTR ( attr -- ) Send attributes to terminal
\ BG> ( attr -- colour) extract colour of Background from attr
\ FG> ( attr -- colour) extract colour of Foreground from attr
\ See colorize.fs for an example of usage.
\ To do: Make <A A> State smart and only compile literals!
0 CONSTANT Black
1 CONSTANT Red
2 CONSTANT Green
3 CONSTANT Yellow
4 CONSTANT Blue
5 CONSTANT Brown
6 CONSTANT Cyan
7 CONSTANT White
1 CONSTANT Bold
2 CONSTANT Underline
4 CONSTANT Blink
8 CONSTANT Invers
\ For portable programs don't use invers and underline
: >BG 4 lshift ;
: >FG >BG >BG ;
: BG> 4 rshift 15 and ;
: FG> 8 rshift 15 and ;
: <A -1 0 ;
: A> BEGIN over -1 <> WHILE or REPEAT nip ;
VARIABLE Attr -1 Attr !
: (Attr!) ( attr -- ) dup Attr @ = IF drop EXIT THEN
dup Attr !
ESC[ 0 pn
dup FG> ?dup IF 30 + ;pn THEN
dup BG> ?dup IF 40 + ;pn THEN
dup Bold and IF 1 ;pn THEN
dup Underline and IF 4 ;pn THEN
dup Blink and IF 5 ;pn THEN
Invers and IF 7 ;pn THEN
[char] m emit ;
' (Attr!) IS Attr!
: BlackSpace Attr @ dup BG> Black =
IF drop space
ELSE 0 attr! space attr! THEN ;