\ ansi.fs Define terminal attributes 20may93jaw
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\ along with this program. If not, see http://www.gnu.org/licenses/.
\ 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:
\ ( -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 State smart and only compile literals!
needs vt100.fs
decimal
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 ;
: BEGIN over -1 <> WHILE or REPEAT nip ;
VARIABLE Attr -1 Attr !
DEFER 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 ;