1-- 2-- SPDX-License-Identifier: BSD-2-Clause 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-- $FreeBSD$ 29-- 30 31local core = require("core") 32local hook = require("hook") 33 34local color = {} 35 36local function recalcDisabled() 37 color.disabled = not color.isEnabled() 38end 39 40-- Module exports 41color.BLACK = 0 42color.RED = 1 43color.GREEN = 2 44color.YELLOW = 3 45color.BLUE = 4 46color.MAGENTA = 5 47color.CYAN = 6 48color.WHITE = 7 49 50color.DEFAULT = 9 51color.BRIGHT = 1 52color.DIM = 2 53 54function color.isEnabled() 55 local c = loader.getenv("loader_color") 56 if c ~= nil then 57 return c:lower() ~= "no" and c ~= "0" 58 end 59 return true 60end 61 62function color.escapefg(color_value) 63 if color.disabled then 64 return '' 65 end 66 return core.KEYSTR_CSI .. "3" .. color_value .. "m" 67end 68 69function color.resetfg() 70 if color.disabled then 71 return '' 72 end 73 return color.escapefg(color.DEFAULT) 74end 75 76function color.escapebg(color_value) 77 if color.disabled then 78 return '' 79 end 80 return core.KEYSTR_CSI .. "4" .. color_value .. "m" 81end 82 83function color.resetbg() 84 if color.disabled then 85 return '' 86 end 87 return color.escapebg(color.DEFAULT) 88end 89 90function color.escape(fg_color, bg_color, attribute) 91 if color.disabled then 92 return "" 93 end 94 if attribute == nil then 95 attribute = "" 96 else 97 attribute = attribute .. ";" 98 end 99 return core.KEYSTR_CSI .. attribute .. 100 "3" .. fg_color .. ";4" .. bg_color .. "m" 101end 102 103function color.default() 104 if color.disabled then 105 return "" 106 end 107 return color.escape(color.DEFAULT, color.DEFAULT) 108end 109 110function color.highlight(str) 111 if color.disabled then 112 return str 113 end 114 -- We need to reset attributes as well as color scheme here, just in 115 -- case the terminal defaults don't match what we're expecting. 116 return core.KEYSTR_CSI .. "1m" .. str .. core.KEYSTR_CSI .. "22m" 117end 118 119recalcDisabled() 120hook.register("config.loaded", recalcDisabled) 121 122return color 123