97 lines
2.2 KiB
Bash
97 lines
2.2 KiB
Bash
#!/usr/bin/env bash
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BLACK='\033[0;30m'
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GRAY='\033[0;37m'
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WHITE='\033[0;97m'
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RED='\033[0;91m'
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GREEN='\033[0;92m'
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YELLOW='\033[0;93m'
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BLUE='\033[0;94m'
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PURPLE='\033[0;95m'
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CYAN='\033[0;96m'
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# prints text without special characters
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# use it to return string values from functions
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function safeprint {
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printf "%s" "$@"
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}
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# prints text with special characters and resets color
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function myprint {
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printf "${GRAY}$@${GRAY}\n"
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}
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function myprint_quiet {
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local quiet=$1
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local text="$2"
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if [ "$quiet" != true ]; then
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myprint "$text"
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fi
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}
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# print message and exit
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function error {
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myprint "${RED}$@"
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exit 1
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}
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# asks a question with two options and returns 0 or 1
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# usage: `if ask_yn "do something?"`
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function ask_yn {
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local answ=""
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myprint "$@ [y/n]"
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read -r answ
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return $([[ "$answ" = [Yy] ]]);
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}
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function char_multiply {
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local character="$1"
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local length="$2"
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i=0
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while [ $i -lt $length ]; do
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printf $character
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i=$((i+1))
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done
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}
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# prints horizontal line occupying whole terminal row
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# https://en.wikipedia.org/wiki/Box-drawing_characters
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function print_hline {
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local color="$1"
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local character="$2"
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if [ -z "$color" ]; then
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color="${GRAY}"
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fi
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if [ -z "$character" ]; then
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character="-";
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fi
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local term_width=$(tput cols)
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local line_length=$((term_width - 1))
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printf "${color}"
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char_multiply "$character" $line_length
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printf "${GRAY}\n"
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}
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# prints horizontal line occupying whole terminal row with a given label
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function print_header {
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local color="$1"
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local character="$2"
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local label="$3"
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if [ -z "$color" ]; then
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color="${GRAY}"
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fi
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if [ -z "$character" ]; then
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character="-";
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fi
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local term_width=$(tput cols)
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local label_length=${#label}
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local line_characters_count=$((term_width - label_length - 2))
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local left_line_length=$(( line_characters_count / 2 ))
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local right_line_length=$(( left_line_length - 1 + line_characters_count % 2 ))
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printf "${color}"
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char_multiply "$character" $left_line_length
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printf "[${label}]${color}"
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char_multiply "$character" $right_line_length
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printf "${GRAY}\n"
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}
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