#!/usr/bin/env sh

# Description: Open a Drag and drop window, to drop files onto other programs.
#              Also provides drag and drop window for files.
#
# Dependencies: dragon - https://github.com/mwh/dragon
#
# Notes:
#   1. Files that are dropped will be added to nnn's selection
#      Some web-based files will be downloaded to current dir
#      with curl and it may overwrite some existing files
#   2. The user has to mm to clear nnn's selection first
#
# Shell: POSIX compliant
# Author: 0xACE

selection=${NNN_SEL:-${XDG_CONFIG_HOME:-$HOME/.config}/nnn/.selection}
resp=f
all=
if type dragon-drag-and-drop >/dev/null 2>&1; then
    dnd="dragon-drag-and-drop"
elif type dragon-drop >/dev/null 2>&1; then
    dnd="dragon-drop"
else
    dnd="dragon"
fi

add_file ()
{
    printf '%s\0' "$@" >> "$selection"
}

if [ -s "$selection" ]; then
    printf "Drag selection (s) or drag current file (f) [default=f]: "
    read -r resp
else
	resp=f
fi

if [ "$resp" = "s" ]; then
	all="--all"
    sed -z 's|'"$PWD/"'||g' < "$selection" | xargs -0 "$dnd" --and-exit "$all" &
else
    if [ -n "$1" ] && [ -e "$1" ]; then
        "$dnd" --and-exit "$1" &
    fi
fi