#!/bin/sh

# dmclip is a menu script to operate on the clipboard selections it can do following operations
# - image to text
# - save clipboard
# - load saved clipboard, caveat: paste must be a single line
# - text replace
#
# arguments:
# - if '$1' is '-p' then dmclip will use the primary selection
#
# dependencies:
# - 'clipp'
# - 'clipo' for pasting
# - 'tesseract' for image to text
# - 'dmenu' as the menu script

tmp="/tmp/dmclip"

clipopt="$1"

# preview string for choosing choice  
mime="$(clipo "$clipopt" | file --brief --mime-type -)"
if [ "${mime%%/*}" = "image" ]; then
    display_clip="IMAGE"
else
    display_clip="$(clipo "$clipopt" | head -c 48)"
fi
    
choice="$(printf 'image\nload\nsave\nreplace\n' | dmenu -p "$display_clip" -c -g 5 -l 1)"
[ "$choice" ] || exit 1

case "$choice" in
    image) 
        [ "${mime%%/*}" != "image" ] && exit 1

        clipo "$clipopt" | tesseract - stdout | sed '/^$/d' > "$tmp"

        # preview the text, prepend by empty line and allow to exit without copying
        yes="$(sed "1i\ " "$tmp" | dmenu -c -l 10 -g 1 -p "PREVIEW:")"
        [ "$yes" ] || exit 1

        clipp "$clipopt" < "$tmp"
        ;;
    load) 
        choice="$(sort "${tmp}.txt" | uniq | dmenu -c -g 1 -l 5)"
        [ "$choice" ] || exit 1

        printf '%s' "$choice" | clipp "$clipopt"
        ;;
    save) clipo "$clipopt" >> "${tmp}.txt" ;;
    replace) 
        match="$(dmenu -c -l 0 -p "replace:" < /dev/null)"
        [ "$match" ] || exit 1

        replacement="$(dmenu -c -l 0 -p "by:" < /dev/null)"
        [ "$replacement" ] || exit 1

        clipo "$clipopt" |
			sed "s/$match/$replacement/g" |
			clipp "$clipopt"
        ;;
esac