Review Request 117601: Improve wallpapers deduplication code a bit

[Martin Klapetek]

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https://git.reviewboard.kde.org/r/117601/
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Review request for Plasma.


Repository: plasma-workspace


Description
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On my system, I have a symlink /usr/share/wallpapers/kde-default.png -> /usr/share/wallpapers/Elarun/contents/images/someresolution.png. This symlink gets processed as an additional image even though it actually points to an image which is already in the set.

So I changed it to always work with the target rather than symlink and then it also checks for the target possibly being in a package, if it is, then it processes the whole package rather than only one file from it.

This fixes one wallpaper (same path) to be shown twice in the wallpaper select dialog.


Diffs
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  wallpapers/image/backgroundlistmodel.cpp 9a051fe 

Diff: https://git.reviewboard.kde.org/r/117601/diff/


Testing
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Thanks,

Martin Klapetek

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