[dolphin] [Bug 495878] Customizing the default view settings doesn't work anymore

[Méven]

https://bugs.kde.org/show_bug.cgi?id=495878

--- Comment #70 from Méven <meven at kde.org> ---
(In reply to Iyán M. V. from comment #68)
> Some thought after reading a bit the source code. I think the issue might
> come from a bug in the logic of when to store settings, and when not. It
> should check if settings in that folder differ from the global ones, not the
> default ones from Dolphin.
> 
> These are my global settings, saved by configuring Dolphin to "use common
> display style for all folders", modifying the settings to my like (i.e.,
> details view, no previews) and then changing back to "remember display style
> for each folder"
> 
> $ getfattr -d ~/.local/share/dolphin/view_properties/global
> # file: home/iyan/.local/share/dolphin/view_properties/global
> user.kde.fm.
> viewproperties#1="[Dolphin]\012PreviewsShown=false\012Timestamp=2025,2,6,22,
> 18,9.49\012Version=4\012ViewMode=1\012"
> 
> Since PreviewsShown=false there, I would expect that any directory with
> PreviewsShown=true should store this in the filesystem attributes or in the
> .directory file. Same goes for ViewMode. It should only be stored if it
> differs from ViewMode=1.
> 
> What I noticed is that these global settings are ignored, and (I guess?)
> default's Dolphin ones are used instead. For example, if I changed
> ~/Pictures/Wallpapers to details view mode.
> 
> $ getfattr -d Pictures/Wallpapers
> user.kde.fm.
> viewproperties#1="[Dolphin]\012PreviewsShown=false\012Timestamp=2025,2,6,22,
> 48,53.577\012Version=4\012ViewMode=1\012"
> 
> Notice that there are two things wrong here: PreviewsShown=false should not
> be saved, and ViewMode=1 should not be saved.
> 
> If I enable previews, then
> 
> $ getfattr -d Pictures/Wallpapers
> user.kde.fm.viewproperties#1="[Dolphin]\012Timestamp=2025,2,6,22,50,8.
> 382\012Version=4\012ViewMode=1\012"
> 
> Again, wrong, because PreviewsShown=true should be saved!
> 
> And what happens when I changed both to Icons view and show previews? Bingo!
> 
> $ getfattr -d Pictures/Wallpapers
> (Nothing!)
> 
> When it should, instead, have saved both PreviewsShown=true and the view
> mode...
> 
> In the source code, the attributes are deleted because boolean allDefault
> (line 534 in current master) gets set to true.
> 
> Hope this helps someone more familiar with Dolphin source code. If I'm not
> wrong above (which maybe I am...), I don't understand why is so hard to
> reproduce the issue...

Well spotted indeed, that's an issue.
https://invent.kde.org/system/dolphin/-/blob/master/src/views/viewproperties.cpp#L535
It uses item->isDefault() but this compares to the hardcoded default view
settings, not the use defined ones as expected.
Something I had overlooked.

That would mean dolphin with debug logs would exhibit `clearing extended
attributes for` sometimes.
But I didn't see it previously.
Do you see it when using ?
QT_LOGGING_RULES="org.kde.dolphin.debug=true" dolphin
I don't want to waste your time though, with the getfattr logs you shared, I
can already confirm the issue.
Thank you verify much for this research work.

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