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.bash_colors
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#!/bin/zsh
#
# Constants and functions for terminal colors.
# Author: Max Tsepkov <max@yogi.pw>
CLR_ESC="\033["
# All these variables has a function with the same name, but in lower case.
#
CLR_RESET=0 # reset all attributes to their defaults
CLR_RESET_UNDERLINE=24 # underline off
CLR_RESET_REVERSE=27 # reverse off
CLR_DEFAULT=39 # set underscore off, set default foreground color
CLR_DEFAULTB=49 # set default background color
CLR_BOLD=1 # set bold
CLR_BRIGHT=2 # set half-bright (simulated with color on a color display)
CLR_UNDERSCORE=4 # set underscore (simulated with color on a color display)
CLR_REVERSE=7 # set reverse video
CLR_BLACK=30 # set black foreground
CLR_RED=31 # set red foreground
CLR_GREEN=32 # set green foreground
CLR_BROWN=33 # set brown foreground
CLR_BLUE=34 # set blue foreground
CLR_MAGENTA=35 # set magenta foreground
CLR_CYAN=36 # set cyan foreground
CLR_WHITE=37 # set white foreground
CLR_BLACKB=40 # set black background
CLR_REDB=41 # set red background
CLR_GREENB=42 # set green background
CLR_BROWNB=43 # set brown background
CLR_BLUEB=44 # set blue background
CLR_MAGENTAB=45 # set magenta background
CLR_CYANB=46 # set cyan background
CLR_WHITEB=47 # set white background
# check if string exists as function
# usage: if fn_exists "sometext"; then ... fi
function fn_exists
{
type "$1" | grep -q 'function'
}
# iterate through command arguments, o allow for iterative color application
function clr_layer
{
# default echo setting
CLR_ECHOSWITCHES="-e"
CLR_STACK=""
CLR_SWITCHES=""
ARGS=("$@")
# iterate over arguments in reverse
for ((i=$#; i>=0; i--)); do
ARG=${ARGS[$i]}
# echo $ARG
# set CLR_VAR as last argtype
firstletter=${ARG:0:1}
# check if argument is a switch
if [ "$firstletter" = "-" ] ; then
# if -n is passed, set switch for echo in clr_escape
if [[ $ARG == *"n"* ]]; then
CLR_ECHOSWITCHES="-en"
CLR_SWITCHES=$ARG
fi
else
# last arg is the incoming string
if [ -z "$CLR_STACK" ]; then
CLR_STACK=$ARG
else
# if the argument is function, apply it
if [ -n "$ARG" ] && fn_exists $ARG; then
#continue to pass switches through recursion
CLR_STACK=$($ARG "$CLR_STACK" $CLR_SWITCHES)
fi
fi
fi
done
# pass stack and color var to escape function
clr_escape "$CLR_STACK" $1;
}
# General function to wrap string with escape sequence(s).
# Ex: clr_escape foobar $CLR_RED $CLR_BOLD
function clr_escape
{
local result="$1"
until [ -z "${2:-}" ]; do
if ! [ $2 -ge 0 -a $2 -le 47 ] 2>/dev/null; then
echo "clr_escape: argument \"$2\" is out of range" >&2 && return 1
fi
result="${CLR_ESC}${2}m${result}${CLR_ESC}${CLR_RESET}m"
shift || break
done
echo "$CLR_ECHOSWITCHES" "$result"
}
function clr_reset { clr_layer $CLR_RESET "$@"; }
function clr_reset_underline { clr_layer $CLR_RESET_UNDERLINE "$@"; }
function clr_reset_reverse { clr_layer $CLR_RESET_REVERSE "$@"; }
function clr_default { clr_layer $CLR_DEFAULT "$@"; }
function clr_defaultb { clr_layer $CLR_DEFAULTB "$@"; }
function clr_bold { clr_layer $CLR_BOLD "$@"; }
function clr_bright { clr_layer $CLR_BRIGHT "$@"; }
function clr_underscore { clr_layer $CLR_UNDERSCORE "$@"; }
function clr_reverse { clr_layer $CLR_REVERSE "$@"; }
function clr_black { clr_layer $CLR_BLACK "$@"; }
function clr_red { clr_layer $CLR_RED "$@"; }
function clr_green { clr_layer $CLR_GREEN "$@"; }
function clr_brown { clr_layer $CLR_BROWN "$@"; }
function clr_blue { clr_layer $CLR_BLUE "$@"; }
function clr_magenta { clr_layer $CLR_MAGENTA "$@"; }
function clr_cyan { clr_layer $CLR_CYAN "$@"; }
function clr_white { clr_layer $CLR_WHITE "$@"; }
function clr_blackb { clr_layer $CLR_BLACKB "$@"; }
function clr_redb { clr_layer $CLR_REDB "$@"; }
function clr_greenb { clr_layer $CLR_GREENB "$@"; }
function clr_brownb { clr_layer $CLR_BROWNB "$@"; }
function clr_blueb { clr_layer $CLR_BLUEB "$@"; }
function clr_magentab { clr_layer $CLR_MAGENTAB "$@"; }
function clr_cyanb { clr_layer $CLR_CYANB "$@"; }
function clr_whiteb { clr_layer $CLR_WHITEB "$@"; }
# Outputs colors table
function clr_dump
{
local T='gYw'
echo -e "\n 40m 41m 42m 43m 44m 45m 46m 47m";
for FGs in ' 0m' ' 1m' ' 30m' '1;30m' ' 31m' '1;31m' \
' 32m' '1;32m' ' 33m' '1;33m' ' 34m' '1;34m' \
' 35m' '1;35m' ' 36m' '1;36m' ' 37m' '1;37m';
do
FG=${FGs// /}
echo -en " $FGs \033[$FG $T "
for BG in 40m 41m 42m 43m 44m 45m 46m 47m; do
echo -en " \033[$FG\033[$BG $T \033[0m";
done
echo;
done
echo
clr_bold " Code Function Variable"
echo \
' 0 clr_reset $CLR_RESET
1 clr_bold $CLR_BOLD
2 clr_bright $CLR_BRIGHT
4 clr_underscore $CLR_UNDERSCORE
7 clr_reverse $CLR_REVERSE
30 clr_black $CLR_BLACK
31 clr_red $CLR_RED
32 clr_green $CLR_GREEN
33 clr_brown $CLR_BROWN
34 clr_blue $CLR_BLUE
35 clr_magenta $CLR_MAGENTA
36 clr_cyan $CLR_CYAN
37 clr_white $CLR_WHITE
40 clr_blackb $CLR_BLACKB
41 clr_redb $CLR_REDB
42 clr_greenb $CLR_GREENB
43 clr_brownb $CLR_BROWNB
44 clr_blueb $CLR_BLUEB
45 clr_magentab $CLR_MAGENTAB
46 clr_cyanb $CLR_CYANB
47 clr_whiteb $CLR_WHITEB
'
}