[kde] [Bug 319528] New: KDE should use the XDG "Thumbnail Managing Standard"

[Jehan]

https://bugs.kde.org/show_bug.cgi?id=319528

            Bug ID: 319528
           Summary: KDE should use the XDG "Thumbnail Managing Standard"
    Classification: Unclassified
           Product: kde
           Version: unspecified
          Platform: Other
               URL: http://specifications.freedesktop.org/thumbnail-spec/t
                    humbnail-spec-latest.html
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: jehan at zemarmot.net

I have not tested the development version, nor checked the code, but on my
stable KDE (4.8.5), it appears that KDE stores thumbnails under
$HOME/.thumbnails, confirmed by this page documentation:
http://techbase.kde.org/KDE_System_Administration/XDG_Filesystem_Hierarchy#Thumbnails
And I can't see any closed nor opened bug tickets about changing this, so I
assume this must still be the case on dev version.

Now there is this standard to store the thumbnails under the XDG cache dir,
which makes sense and tidy up the home directory:
http://specifications.freedesktop.org/thumbnail-spec/thumbnail-spec-latest.html

GNOME has already changed this for instance:
https://git.gnome.org/browse/gnome-desktop/commit/?id=22582a4ba4de44af8b0ea195f9896715fa8ac75d
And we are discussing doing the change in GIMP too for instance.
Would be awesome if KDE desktop (and any other program using the old convention
in general) could do the update too! :-)
Thanks!

Reproducible: Always

Steps to Reproduce:
1. Delete/rename the folder $HOME/.thumbnails if existing
2. Use a KDE software which creates and store image thumbnails (dolphin file
manager for instance) and see a folder with image preview.
Actual Results:  
The ~/.thumbnails/ directory will be created and filled.

Expected Results:  
I would expect these previews to be generated in ~/.cache/thumbnails/ instead.

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