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List: kde-frameworks-devel
Subject: Re: Review Request 128574: Enable natural sorting on QCollator in KDirSortFilterProxyModel
From: Konstantinos Smanis <konstantinos.smanis () gmail ! com>
Date: 2016-11-27 19:17:46
Message-ID: 20161127191746.20698.48782 () mimi ! kde ! org
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I can confirm that the patch indeed resolves the natural sorting issue in \
KDirSortFilterProxyModel, which is a logical bug (an omission) introduced at some \
point during the KF5 kio port. It's been there since the initial git import of KF5 \
kio (as per [1]).
However, the patch is a half-measure as it doesn't fully address the issue at hand. \
Essentially it enforces natural sorting in the KDirSortFilterProxyModel class, as the \
relevant configuration option (kdeglobals config file -> [KDE] config group -> \
"NaturalSorting" config entry) is not accessible (i.e. editable) to the user by means \
of a GUI. It used to, but this is no longer case (as per commit [2]). See, back in \
KDE 4.x, Dolphin and Gwenview (and essentially any code relying on \
KDirSortFilterProxyModel) shared the same natural sorting configuration (by means of \
KGlobalSettings::naturalSorting() [3], which btw has been moved to kdelibs4support in \
KF5 [4]) and this was, for better or worse, configurable through Dolphin. Per the \
above mentioned commit though ([2]), Dolphin went a different way, so the \
"NaturalSorting" config entry in kdeglobals is only configurable by hand editing the \
config file.
On a side note, it's also worth mentioning that Dolphin never made use of \
KDirSortFilterProxyModel, it performs its own natural sorting.
tl;dr: In KDE 4.x everyone relied on KGlobalSettings::naturalSorting() for natural \
sorting configuration, which allowed for uniform sorting behaviour in different \
applications. This is no longer the case, so from a casual user's perspective, this \
patch would only hardcode natural sorting in Gwenview (the main user of \
KDirSortFilterProxyModel natural sorting). The patch as it stands is not wrong, but \
the underlying issue is broader.
I hope I didn't omit anything, I have been juggling with pre- and post-KF5 code \
trying to find out what went wrong in the way. A design decision has to be made on \
the issue. For more info check the related bug report.
[1] https://cgit.kde.org/kio.git/log/src/filewidgets/kdirsortfilterproxymodel.cpp
[2] https://cgit.kde.org/dolphin.git/commit/?id=fdb5c0d33e38e9d5fedc821c586bbb5ca8a0d2a5
[3] https://lxr.kde.org/source/kde/kdelibs/kdeui/kernel/kglobalsettings.cpp?v=stable-qt4#0775
[4] https://lxr.kde.org/source/frameworks/kdelibs4support/src/kdeui/kglobalsettings.cpp#0552
- Konstantinos Smanis
On Aug. 2, 2016, 1:08 p.m., Mathis Beer wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/128574/
> -----------------------------------------------------------
>
> (Updated Aug. 2, 2016, 1:08 p.m.)
>
>
> Review request for KDE Frameworks, Pieter David, David Faure, and Harald Sitter.
>
>
> Bugs: 343452
> https://bugs.kde.org/show_bug.cgi?id=343452
>
>
> Repository: kio
>
>
> Description
> -------
>
> KDirSortFilterProxyModel is advertised in the header as performing a "natural \
> sort", ie. "7 8 9 10 11", instead of a lexical "10 11 7 8 9". However, as far as I \
> can tell this was never true from the start, since the collator responsible for the \
> actual sorting did not have the requisite numeric mode enabled, and this setting \
> has always been off by default as far back as I can find docs for it (Qt 5.2).
> (Dolphin, which offers "natural sort", did not run into this issue because it does \
> not actually use KDirSortFilterProxyModel.)
>
> Diffs
> -----
>
> src/filewidgets/kdirsortfilterproxymodel.cpp 89505ac
>
> Diff: https://git.reviewboard.kde.org/r/128574/diff/
>
>
> Testing
> -------
>
> Create a folder with three images, "File 1.png", "File 10.png", "File 2.png".
> View the folder in Gwenview with sort order set to "Name". The sort order is "File \
> 1.png, File 10.png, File 2.png". Apply patch.
> View the folder in Gwenview with sort order set to "Name". The sort order is "File \
> 1.png, File 2.png, File 10.png".
>
> Thanks,
>
> Mathis Beer
>
>
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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/128574/">https://git.reviewboard.kde.org/r/128574/</a>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: \
0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">I can \
confirm that the patch indeed resolves the natural sorting issue in \
KDirSortFilterProxyModel, which is a logical bug (an omission) introduced at some \
point during the KF5 kio port. It's been there since the initial git import of KF5 \
kio (as per [1]).</p> <p style="padding: 0;text-rendering: inherit;margin: \
0;line-height: inherit;white-space: inherit;">However, the patch is a half-measure as \
it doesn't fully address the issue at hand. Essentially it enforces natural sorting \
in the KDirSortFilterProxyModel class, as the relevant configuration option \
(kdeglobals config file -> [KDE] config group -> "NaturalSorting" config entry) \
is not accessible (i.e. editable) to the user by means of a GUI. It used to, but this \
is no longer case (as per commit [2]). See, back in KDE 4.x, Dolphin and Gwenview \
(and essentially any code relying on KDirSortFilterProxyModel) shared the same \
natural sorting configuration (by means of KGlobalSettings::naturalSorting() [3], \
which btw has been moved to kdelibs4support in KF5 [4]) and this was, for better or \
worse, configurable through Dolphin. Per the above mentioned commit though ([2]), \
Dolphin went a different way, so the "NaturalSorting" config entry in kdeglobals is \
only configurable by hand editing the config file.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">On a side note, it's also worth mentioning that \
Dolphin never made use of KDirSortFilterProxyModel, it performs its own natural \
sorting.</p> <p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">tl;dr: In KDE 4.x everyone relied on \
KGlobalSettings::naturalSorting() for natural sorting configuration, which allowed \
for uniform sorting behaviour in different applications. This is no longer the case, \
so from a casual user's perspective, this patch would only hardcode natural sorting \
in Gwenview (the main user of KDirSortFilterProxyModel natural sorting). The patch as \
it stands is not wrong, but the underlying issue is broader.</p> <p style="padding: \
0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">I \
hope I didn't omit anything, I have been juggling with pre- and post-KF5 code trying \
to find out what went wrong in the way. A design decision has to be made on the \
issue. For more info check the related bug report.</p> <p style="padding: \
0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">[1] \
https://cgit.kde.org/kio.git/log/src/filewidgets/kdirsortfilterproxymodel.cpp [2] \
https://cgit.kde.org/dolphin.git/commit/?id=fdb5c0d33e38e9d5fedc821c586bbb5ca8a0d2a5 \
[3] https://lxr.kde.org/source/kde/kdelibs/kdeui/kernel/kglobalsettings.cpp?v=stable-qt4#0775
[4] https://lxr.kde.org/source/frameworks/kdelibs4support/src/kdeui/kglobalsettings.cpp#0552</p></pre>
<br />
<p>- Konstantinos Smanis</p>
<br />
<p>On August 2nd, 2016, 1:08 p.m. EEST, Mathis Beer wrote:</p>
<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="12" style="border: \
1px #888a85 solid; border-radius: 6px; -moz-border-radius: 6px; \
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<td>
<div>Review request for KDE Frameworks, Pieter David, David Faure, and Harald \
Sitter.</div> <div>By Mathis Beer.</div>
<p style="color: grey;"><i>Updated Aug. 2, 2016, 1:08 p.m.</i></p>
<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://bugs.kde.org/show_bug.cgi?id=343452">343452</a>
</div>
<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt;">Repository: </b>
kio
</div>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" \
style="border: 1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">KDirSortFilterProxyModel is advertised in the header \
as performing a "natural sort", ie. "7 8 9 10 11", instead of a lexical "10 11 7 8 \
9". However, as far as I can tell this was never true from the start, since the \
collator responsible for the actual sorting did not have the requisite numeric mode \
enabled, and this setting has always been off by default as far back as I can find \
docs for it (Qt 5.2).</p> <p style="padding: 0;text-rendering: inherit;margin: \
0;line-height: inherit;white-space: inherit;">(Dolphin, which offers "natural sort", \
did not run into this issue because it does not actually use \
KDirSortFilterProxyModel.)</p></pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: \
1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">Create a folder with three images, "File 1.png", "File \
10.png", "File 2.png". View the folder in Gwenview with sort order set to "Name". The \
sort order is "File 1.png, File 10.png, File 2.png". Apply patch.
View the folder in Gwenview with sort order set to "Name". The sort order is "File \
1.png, File 2.png, File 10.png".</p></pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>src/filewidgets/kdirsortfilterproxymodel.cpp <span style="color: \
grey">(89505ac)</span></li>
</ul>
<p><a href="https://git.reviewboard.kde.org/r/128574/diff/" style="margin-left: \
3em;">View Diff</a></p>
</td>
</tr>
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