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.\" SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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.\" Copyright (c) 2018 Kyle Evans <kevans@FreeBSD.org>
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.Dd August 19, 2018
.Dt COLOR.LUA 8
.Os
.Sh NAME
.Nm color.lua
.Nd FreeBSD color module
.Sh DESCRIPTION
.Nm
contains functionality for working with colors.
.Pp
Before using the functionality provided by
.Nm ,
it must be included with a statement such as the following:
.Pp
.Dl local color = require("color")
.Pp
The following color constants are exported from
.Nm :
.Bl -tag -width "Ic color.MAGENTA" -offset indent
.It Ic color.BLACK
.It Ic color.RED
.It Ic color.GREEN
.It Ic color.YELLOW
.It Ic color.BLUE
.It Ic color.MAGENTA
.It Ic color.CYAN
.It Ic color.WHITE
.El
.Pp
The following attribute constants are exported from
.Nm :
.Bl -tag -width "Ic color.DEFAULT" -offset indent
.It Ic color.DEFAULT
.It Ic color.BRIGHT
.It Ic color.DIM
.El
.Pp
The following functions are exported from
.Nm :
.Bl -tag -width "Fn color.isEnabled" -offset indent
.It Fn color.isEnabled
Returns True if
.Xr loader 8
has been configured to not allow color, False otherwise.
This checks the
.Ev loader_color
.Xr loader.conf 5
variable, along with
.Fn core.isSerialBoot .
.It Fn color.escapefg color_value
Returns the escape sequence that encodes
.Fa color_value
as a foreground color.
.Fn color.escapefg
returns an empty string if color is disabled.
.It Fn color.resetfg
Returns the escape sequence for the default foreground color.
.Fn color.resetfg
returns an empty string if color is disabled.
.It Fn color.escapebg color_value
Returns the escape sequence that encodes
.Fa color_value
as a background color.
.Fn color.escapebg
returns an empty string if color is disabled.
.It Fn color.resetbg
Returns the escape sequence for the default background color.
.Fn color.resetbg
returns an empty string if color is disabled.
.It Fn color.escape fg_color bg_color attribute
Returns an escape sequence that encodes
.Fa fg_color
as the foreground color,
.Fa bg_color
as the background color, and
.Fa attribute
applied.
.Fn color.escape
returns an empty string if color is disabled.
.It Fn color.default
Returns the escape sequence for the default color scheme, white on black with
no attributes applied.
.Fn color.default
returns an empty string if color is disabled.
.It Fn color.highlight str
Returns
.Fa str
with the
.Ic color.BRIGHT
attribute applied before it and reset after it.
.Fn color.highlight
returns
.Fa str
if color is disabled.
.El
.Sh SEE ALSO
.Xr screen.lua 8
.Sh AUTHORS
The
.Nm
file was originally written by
.An Pedro Souza Aq Mt pedrosouza@FreeBSD.org .
Later work and this manual page was done by
.An Kyle Evans Aq Mt kevans@FreeBSD.org .
