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#!/bin/sh

output_text () {
  notify-send "$1" "$2"
  printf "%s\n" "$2"
}

printhelp () {
  printf "scrshot: takes a screenshot and saves to a filename.\n"
  printf "\tw) force wayland backend\n"
  printf "\tx) force x backend\n"
  printf "\td X) provide X as arg to dmenu\n"
  printf "\ts X) provide X as arg to screenshot util\n"
  printf "\to X) save file to X\n"
  exit 1
}

while getopts "wxd:s:o:" o; do case "${o}" in
  w)
    SCRSH="grim"
    ;;
  x)
    SCRSH="maim"
    ;;
  d) DARG=${DARG:+"$DARG "}"$OPTARG" ;;
  s) SARG=${SARG:+"$SARG "}"$OPTARG" ;;
  o) FILENAME="$OPTARG" ;;
  *) printhelp ;;
esac done

if [ -z "$SCRSH" ]; then
  if [ -n "$WAYLAND_DISPLAY" ]; then
    SCRSH="grim"
  elif [ -n "$DISPLAY" ]; then
    SCRSH="maim"
  else
    output_text "Stuck" "Can't tell if Wayland or X, what gives?"
    exit 1
  fi
fi

sleep 0.3

TEMPNAME="$(mktemp -u | xargs basename)"
TEMPFILE="${TEMPNAME#tmp.}.png"

sleep 0.1
"$SCRSH" ${SARG:+"$SARG"} "$TEMPFILE"

if [ -z "$FILENAME" ]; then
  FILENAME="$(echo "$TEMPFILE" | dmenu ${DARG:+"$DARG"} -p "What to name the file?")"
  if [ -z "$FILENAME" ]; then
    rm -rf "$TEMPFILE"
    output_text "Deleted" "No filename selected, file deleted!"
    exit
  fi
fi

mv "$TEMPFILE" "$FILENAME"