take-screenshot

#!/usr/bin/env bash
#
# rofi menu to take screenshots with maim
#
# usage: take-screenshot
#
#   $ take-screenshot

# This option will make the script exit when there is an error
set -o errexit
# This option will make the script exit when last command threw an error
set -o pipefail
# This option will make the script exit when it tries to use an unset variable
set -o nounset
# Trace what gets executed
# set -o xtrace

dir_screenshots="$HOME/Pictures/Screenshots"
file_extension="png"
filename=""
filename_prefix=""
maim_option=""
selection=-1

# create screenshot directory
mkdir -p "${dir_screenshots}"

# start
case $(echo "[1] Fullscreen|[2] Selection|[3] Active Window|[4] High Quality|[5] Open screenshots directory" | rofi -sep '|' -auto-select -no-fixed-num-lines -dmenu -p "Take Screenshot" -i) in
  '[1] Fullscreen')
    selection=1
    filename_prefix="default"
    maim_option=""
    dunstify_title_postfix="Fullscreen"
    ;;
  '[2] Selection')
    selection=2
    filename_prefix="selection"
    maim_option="-s"
    dunstify_title_postfix="Selection"
    ;;
  '[3] Active Window')
    selection=3
    filename_prefix="active"
    maim_option="-i $(xdotool getactivewindow)"
    dunstify_title_postfix="Active Window"
    ;;
  '[4] High Quality')
    selection=4
    filename_prefix="hq"
    maim_option="-m 1"
    dunstify_title_postfix="High Quality"
    ;;
  '[5] Open screenshots directory')
    selection=0
    ;;
esac

# put together all the pieces for the filename
filename="${filename_prefix}-$(date -u +"%Y-%m-%d-%T").${file_extension}"

# Do nothing by default
if (( "${selection}" == 0 )); then
  # Open nnn by default
  $TERM -e nnn "${dir_screenshots}" &
elif (( "${selection}" > 0 )); then
  # Take screenshot
  maim -q $maim_option "${filename}" 
  mv "${filename}" "${dir_screenshots}"
  # Display notification
  dunstify "Screenshot: ${dunstify_title_postfix}" "${filename} saved in ${dir_screenshots} directory"
fi

exit $?