[kio] [Bug 338411] Dolphin infinitely trying to make previous for images located in previews

[Frank Reininghaus]

https://bugs.kde.org/show_bug.cgi?id=338411

Frank Reininghaus <frank78ac at googlemail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |frank78ac at googlemail.com
          Component|view-engine: icons mode     |thumbnail
            Product|dolphin                     |kio
         Resolution|WAITINGFORINFO              |---
           Assignee|dolphin-bugs-null at kde.org   |unassigned-bugs at kde.org
             Status|NEEDSINFO                   |UNCONFIRMED

--- Comment #3 from Frank Reininghaus <frank78ac at googlemail.com> ---
OK, thanks. The problem could be:

1. Dolphin requests thumbnails for files in ~/.thumbnails/large.

2. KIO::PreviewJob lets a thumbnailer for the respective format create a
thumbnail image, and stores it in ~/.thumbnails/large.

3. Dolphin notices that there is a new (or modified) file in the view and wants
to get a new (or updated) thumbnail -> back to step 1.

If that is indeed what happens, then I think that this can only be solved
inside KIO::PreviewJob, which should not let the thumbnailers create thumbnails
for files inside ~/.thumbnails, but just use those files directly.

I cannot reproduce the problem though (tried opening ~/.thumbnails/large and
~/.thumbnails/normal in the view, hovered files to trigger thumbnail-loading in
the information panel), so I don't know if my analysis is correct or not.

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