https://bugs.kde.org/show_bug.cgi?id=444638

            Bug ID: 444638
           Summary: Selectively disable folder previews/thumbs
           Product: kio-extras
           Version: unspecified
          Platform: Manjaro
                OS: Linux
            Status: REPORTED
          Severity: wishlist
          Priority: NOR
         Component: Thumbnails and previews
          Assignee: plasma-b...@kde.org
          Reporter: khir...@gmail.com
  Target Milestone: ---

SUMMARY
After some time using Dolphin as my File Explorer, I've come to really want to
hide the folder thumbs/previews of *some* of them, due to they containing
sensitive data, or just because I want to add a custom icon to it but without
the previews on top of it, and without having to disable folder previews
completely.
(In case it's not clear I'll clarify: I'm only talking about the previews
generated for the folder icon, not the thumbnails of the files inside folders.)


My first thought on this was how Android has the .nomedia files inside folders
to tell programs not to look into them. And well, KDE has something similar for
custom folder icons and per-directory view settings: the .directory file.
>From what I've seen this file uses the same format as the .desktop files, but
without the standard/freedesktop specification. So the next part shouldn't be
much of a problem of going against a standard.
My proposal is adding a flag in the .directory file of a directory, which the
thumbnailer can easily read and skip the thumb generation for it. Implementing
a menu to change the flag would be another thing and probably would go in the
Dolphin product, and also take more work, but at least the option to manually
edit the file and add the entry/flag would be better than none at all.

I've looked at the code and it doesn't seem too hard to implement. I'm don't
really code in C, but I could still give it a shot in my free time and make an
MR on Invent, and then reviewing wouldn't be as much job for the maintainers,
maybe. I also imagine there are higher priority tasks, even more since I am
suggesting skipping the UI setting for now.
I do have seen at least one post online asking for this.

So yeah... opinions?

SOFTWARE/OS VERSIONS
Linux Distro: Manjaro (Kernel: 5.4)
KDE Plasma Version: 5.22.5
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2

(Sorry if I strayed away from the standard bug/feature req report. I'm really
new here (2nd post) and I'm not really sure how to format feature requests like
this one)

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