QRENCODE=”$(which qrencode)”

if test -z “$QRENCODE”; then
echo “Could not find qrencode program.”
exit 1
fi

CLIPBOARD_READER=”"

XSEL=”$(which xsel)”
if test -z “$CLIPBOARD_READER” && test -n “$XSEL”; then
CLIPBOARD_READER=”$XSEL”
fi

XCLIP=”$(which xclip)”
if test -z “$CLIPBOARD_READER” && test -n “$XCLIP”; then
CLIPBOARD_READER=”$XCLIP -o”
fi

if test -z “$CLIPBOARD_READER”; then
echo “Could not find program to read clipboard data.”
exit 1
fi

DISPLAY_PROGRAM=”"

FEH=”$(which feh)”
if test -z “$DISPLAY_PROGRAM” && test -n “$FEH”; then
DISPLAY_PROGRAM=”$FEH -F”
fi

XLOADIMAGE=”$(which xloadimage)”
if test -z “$DISPLAY_PROGRAM” && test -n “$XLOADIMAGE”; then
DISPLAY_PROGRAM=”$XLOADIMAGE -fullscreen”
fi

PDISPLAY=”$(which display)”
if test -z “$DISPLAY_PROGRAM” && test -n “$PDISPLAY”; then
DISPLAY_PROGRAM=”$PDISPLAY -backdrop -flatten -background #000000″
fi

if test -z “$DISPLAY_PROGRAM”; then
echo “Could not find program to display images.”
exit 1
fi

CLIPBOARD_DATA=”$($CLIPBOARD_READER)”

if test -z “$CLIPBOARD_DATA”; then
echo “There was no data on clipboard.”
exit 1
fi

MODULE_SIZE=5
TARGET_FILE=”$(tempfile -p .qr-code- -s .png)”

“$QRENCODE” -o “$TARGET_FILE” -s “$MODULE_SIZE” “$CLIPBOARD_DATA” && $DISPLAY_PROGRAM “$TARGET_FILE”
rm “$TARGET_FILE”