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