2 -- SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 -- Copyright (c) 2015 Pedro Souza <pedrosouza@freebsd.org>
5 -- All rights reserved.
7 -- Redistribution and use in source and binary forms, with or without
8 -- modification, are permitted provided that the following conditions
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.
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
31 local core = require("core")
49 function color.isEnabled()
50 local c = loader.getenv("loader_color")
52 if c:lower() == "no" or c == "0" then
56 return not core.isSerialBoot()
59 color.disabled = not color.isEnabled()
61 function color.escapefg(color_value)
62 if color.disabled then
65 return core.KEYSTR_CSI .. "3" .. color_value .. "m"
68 function color.resetfg()
69 if color.disabled then
72 return color.escapefg(color.WHITE)
75 function color.escapebg(color_value)
76 if color.disabled then
79 return core.KEYSTR_CSI .. "4" .. color_value .. "m"
82 function color.resetbg()
83 if color.disabled then
86 return color.escapebg(color.BLACK)
89 function color.escape(fg_color, bg_color, attribute)
90 if color.disabled then
93 if attribute == nil then
96 attribute = attribute .. ";"
98 return core.KEYSTR_CSI .. attribute ..
99 "3" .. fg_color .. ";4" .. bg_color .. "m"
102 function color.default()
103 if color.disabled then
106 return color.escape(color.WHITE, color.BLACK, color.DEFAULT)
109 function color.highlight(str)
110 if color.disabled then
113 -- We need to reset attributes as well as color scheme here, just in
114 -- case the terminal defaults don't match what we're expecting.
115 return core.KEYSTR_CSI .. "1m" .. str .. core.KEYSTR_CSI .. "22m"