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|
\ tag: terminal emulation
\
\ this code implements IEEE 1275-1994 ANNEX B
\
\ Copyright (C) 2003 Stefan Reinauer
\
\ See the file "COPYING" for further information about
\ the copyright and warranty status of this work.
\
0 value (escseq)
10 buffer: (sequence)
: (match-number) ( x y [1|2] [1|2] -- x [z] )
2dup = if \ 1 1 | 2 2
drop exit
then
2dup > if
2drop drop 1 exit
then
2drop 0
;
: (esc-number) ( maxchar -- ?? ?? num )
>r depth >r ( R: depth maxchar )
0 (sequence) 2+ (escseq) 2- ( 0 seq+2 seqlen-2 )
\ if numerical, scan until non-numerical
0 ?do
( 0 seq+2 )
dup i + c@ a
digit if
( 0 ptr n )
rot a * + ( ptr val )
swap
else
( 0 ptr asc )
ascii ; = if
0 swap
else
drop leave
then
then
loop
depth r> - r>
0 to (escseq)
(match-number)
;
: (match-seq)
(escseq) 1- (sequence) + c@ \ get last character in sequence
\ dup draw-character
case
ascii A of \ CUU - cursor up
1 (esc-number)
0> if
1 max
else
1
then
negate line# +
0 max to line#
endof
ascii B of \ CUD - cursor down
1 (esc-number)
0> if
1 max
line# +
#lines 1- min to line#
then
endof
ascii C of \ CUF - cursor forward
1 (esc-number)
0> if
1 max
column# +
#columns 1- min to column#
then
endof
ascii D of \ CUB - cursor backward
1 (esc-number)
0> if
1 max
negate column# +
0 max to column#
then
endof
ascii E of \ Cursor next line (CNL)
\ FIXME - check agains ANSI3.64
1 (esc-number)
0> if
1 max
line# +
#lines 1- min to line#
then
0 to column#
endof
ascii f of
2 (esc-number)
2 = if
#columns 1- min to column#
#lines 1- min to line#
then
endof
ascii H of
2 (esc-number)
2 = if
#columns 1- min to column#
#lines 1- min to line#
then
endof
ascii J of
0 to (escseq)
#columns column# - delete-characters
#lines line# - delete-lines
endof
ascii K of
0 to (escseq)
#columns column# - delete-characters
endof
ascii L of
1 (esc-number)
0> if
1 max
insert-lines
then
endof
ascii M of
1 (esc-number)
1 = if
1 max
delete-lines
then
endof
ascii @ of
1 (esc-number)
1 = if
1 max
insert-characters
then
endof
ascii P of
1 (esc-number)
1 = if
1 max
delete-characters
then
endof
ascii m of
1 (esc-number)
1 = if
7 = if
true to inverse?
else
false to inverse?
then
then
endof
ascii p of \ normal text colors
0 to (escseq)
inverse-screen? if
false to inverse-screen?
inverse? 0= to inverse?
invert-screen
then
endof
ascii q of \ inverse text colors
0 to (escseq)
inverse-screen? not if
true to inverse-screen?
inverse? 0= to inverse?
invert-screen
then
endof
ascii s of
\ Resets the display device associated with the terminal emulator.
0 to (escseq)
reset-screen
endof
endcase
;
: (term-emit) ( char -- )
toggle-cursor
(escseq) 0> if
(escseq) 10 = if
0 to (escseq)
." overflow in esc" cr
drop
then
(escseq) 1 = if
dup ascii [ = if \ not a [
(sequence) 1+ c!
2 to (escseq)
else
0 to (escseq) \ break out of ESC sequence
." out of ESC" cr
drop \ don't print breakout character
then
toggle-cursor exit
else
(sequence) (escseq) + c!
(escseq) 1+ to (escseq)
(match-seq)
toggle-cursor exit
then
then
case
7 of \ BEL
blink-screen
s" /screen" s" ring-bell"
execute-device-method
endof
8 of \ BS
column# 0<> if
column# 1- dup
to column#
20 draw-character
to column#
then
endof
9 of \ TAB
column# dup #columns = if
drop
else
8 + -8 and ff and to column#
then
endof
a of \ LF
line# 1+ to line# 0 to column#
endof
b of \ VT
line# 0<> if
line# 1- to line#
then
endof
c of \ FF
0 to column# 0 to line#
erase-screen
endof
d of \ CR
0 to column#
endof
1b of \ ESC
1b (sequence) c!
1 to (escseq)
endof
dup draw-character
endcase
toggle-cursor
;
['] (term-emit) to fb-emit
|
