screen.lua revision 354059 
1--
2-- SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3--
4-- Copyright (c) 2015 Pedro Souza <pedrosouza@freebsd.org>
5-- All rights reserved.
6--
7-- Redistribution and use in source and binary forms, with or without
8-- modification, are permitted provided that the following conditions
9-- are met:
10-- 1. Redistributions of source code must retain the above copyright
11--    notice, this list of conditions and the following disclaimer.
12-- 2. Redistributions in binary form must reproduce the above copyright
13--    notice, this list of conditions and the following disclaimer in the
14--    documentation and/or other materials provided with the distribution.
15--
16-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17-- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19-- ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20-- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24-- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25-- OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26-- SUCH DAMAGE.
27--
28-- $FreeBSD: stable/11/stand/lua/screen.lua 354059 2019-10-25 00:47:37Z kevans $
29--
30
31local color = require("color")
32local core = require("core")
33
34local screen = {}
35
36-- Module exports
37screen.default_x = 0
38screen.default_y = 25
39
40function screen.clear()
41	printc(core.KEYSTR_CSI .. "H" .. core.KEYSTR_CSI .. "J")
42end
43
44function screen.setcursor(x, y)
45	printc(core.KEYSTR_CSI .. y .. ";" .. x .. "H")
46end
47
48function screen.setforeground(color_value)
49	if color.disabled then
50		return
51	end
52	printc(color.escapefg(color_value))
53end
54
55function screen.setbackground(color_value)
56	if color.disabled then
57		return
58	end
59	printc(color.escapebg(color_value))
60end
61
62function screen.defcolor()
63	printc(color.default())
64end
65
66function screen.defcursor()
67	screen.setcursor(screen.default_x, screen.default_y)
68end
69
70return screen
71