Cinnamon Folder Thumbnailer

folder-thumbnailer

#!/bin/bash

# LICENSE: BSD3-Clause 
# made by Sythelux Rikd

# DESC: this script creates a montage of images within a folder to create a folder icon for nemo
# it respects folder.jpg and .folder.jpg being set
# it is rather imperformant, maybe someone will improve it.
# needs to be put into /usr/bin/folder-thumbnailer

# echo $1 $2 $3 $4

IFS=$'\n'

# TODO: would be cool to have an early stop similar to functional programming where you can have an enumerator and then take 4 and that is it.
files=($(find "$2" -maxdepth 2 -type f |
  file --mime-type -f - |
  grep -F image/ |
  rev | cut -d : -f 2- | rev
))

inset=$(($1/8))
border=$(($1/16))

# TODO:
# 1. find some programm that get's an icon for name
# 2. lookup folder icon
# 3. use folder icon as bg or at least extract the median or average color from folder icon to set as BG
BG='#0096f3'
#THEME=$(gsettings get org.gnome.desktop.interface icon-theme | tr -d "'")
#THEME=$(gsettings get org.cinnamon.desktop.interface icon-theme | tr -d "'")
#FOLDER_ICON="$HOME/.themes/${THEME}/places/$1/folder.svg"
# FOLDER_ICON="/usr/share/icons/.themes/${THEME}/places/$1/folder.svg"
#FOLDER_ICON="$HOME/.local/share/icons/folder.png"

convert -thumbnail "$1" "$2/folder.jpg" "$3" 1>/dev/null 2>&1 ||\
convert -thumbnail "$1" "$2/.folder.jpg" "$3" 1>/dev/null 2>&1 ||\
montage -tile 2x2 -background "$BG" -geometry $1x$1+$inset+$inset -border $border -shadow "${files[0]}" "${files[1]}" "${files[2]}" "${files[3]}" "$3" ||\
montage -tile 2x2 -background "$BG" -geometry $1x$1+$inset+$inset -border $border -shadow "${files[0]}" "${files[1]}" "${files[2]}" "$3" ||\
montage -tile 2x2 -background "$BG" -geometry $1x$1+$inset+$inset -border $border -shadow "${files[0]}" "${files[1]}" "$3" ||\
montage -tile 2x2 -background "$BG" -geometry $1x$1+$inset+$inset -border $border -shadow "${files[0]}" "$3" ||\
rm -f "$HOME/.cache/thumbnails/normal/$(echo -n "$4" | md5sum | cut -d " " -f1).png" ||\
rm -f "$HOME/.thumbnails/normal/$(echo -n "$4" | md5sum | cut -d " " -f1).png" ||\
rm -f "$HOME/.cache/thumbnails/large/$(echo -n "$4" | md5sum | cut -d " " -f1).png" ||\
rm -f "$HOME/.thumbnails/large/$(echo -n "$4" | md5sum | cut -d " " -f1).png" ||\
exit 1

folder.thumbnailer

[Thumbnailer Entry]
Version=1.0
Encoding=UTF-8
Type=X-Thumbnailer
Name=Folder Thumbnailer
MimeType=inode/directory;
Exec=/usr/bin/folder-thumbnailer %s %i %o %u


# needs to be put into /usr/share/thumbnailers you also might have to remove this line