#!/bin/bash

SAVE_DIR=/tmp/qrdisplay.sh
FILENAME=qr.png

qrdisplay() {
    qrencode "$1" -o "$FILENAME" && nsxiv "$FILENAME" && rm "$FILENAME"
}

mkdir -p "$SAVE_DIR" && cd "$SAVE_DIR" || exit

if [ -z "$1" ]; then
    qrdisplay "$1"
fi

qrdisplay "$(xclip -selection "clipboard" -o)"