screen.4th revision 360599 
1\ Copyright (c) 2003 Scott Long <scottl@FreeBSD.org>
2\ Copyright (c) 2015 Devin Teske <dteske@FreeBSD.org>
3\ All rights reserved.
4\ 
5\ Redistribution and use in source and binary forms, with or without
6\ modification, are permitted provided that the following conditions
7\ are met:
8\ 1. Redistributions of source code must retain the above copyright
9\    notice, this list of conditions and the following disclaimer.
10\ 2. Redistributions in binary form must reproduce the above copyright
11\    notice, this list of conditions and the following disclaimer in the
12\    documentation and/or other materials provided with the distribution.
13\ 
14\ THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15\ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16\ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17\ ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18\ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19\ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20\ OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21\ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22\ LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23\ OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24\ SUCH DAMAGE.
25\ 
26\ $FreeBSD: stable/11/stand/forth/screen.4th 360599 2020-05-03 04:03:05Z kevans $
27
28marker task-screen.4th
29
30\ emit Esc-[
31: escc ( -- ) 27 emit [char] [ emit ;
32
33\ Home cursor ( Esc-[H )
34: ho ( -- ) escc [char] H emit ;
35
36\ Clear from current position to end of display ( Esc-[J )
37: cld ( -- ) escc [char] J emit ;
38
39\ clear screen
40: clear ( -- ) ho cld ;
41
42\ reset to initial state
43: ris ( -- ) 27 emit [char] c emit ;
44
45\ move cursor to x rows, y cols (1-based coords) ( Esc-[%d;%dH )
46: at-xy ( x y -- ) escc .# [char] ; emit .# [char] H emit ;
47
48\ Set foreground color ( Esc-[3%dm )
49: fg ( x -- ) escc 3 .# .# [char] m emit ;
50
51\ Set background color ( Esc-[4%dm )
52: bg ( x -- ) escc 4 .# .# [char] m emit ;
53
54\ Mode end (clear attributes)
55: me ( -- ) escc [char] m emit ;
56
57\ Enable bold mode ( Esc-[1m )
58: b ( -- ) escc 1 .# [char] m emit ;
59
60\ Disable bold mode ( Esc-[22m )
61: -b ( -- ) escc 22 .# [char] m emit ;
62
63\ Enable inverse foreground/background mode ( Esc-[7m )
64: inv ( -- ) escc 7 .# [char] m emit ;
65
66\ Disable inverse foreground/background mode ( Esc-[27m )
67: -inv ( -- ) escc 27 .# [char] m emit ;
68
69\ Convert all occurrences of given character (c) in string (c-addr/u) to Esc
70: escc! ( c-addr/u c -- c-addr/u )
71	2 pick 2 pick
72	begin dup 0> while
73		over c@ 3 pick = if over 27 swap c! then
74		1- swap 1+ swap
75	repeat
76	2drop drop
77;
78