1908196 - [X11/KDE] Drag and drop of multiple files, only one file show up

Status: RESOLVED FIXED

(Core :: Widget: Gtk, defect, P3)

Description

[Sergey]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:130.0) Gecko/20100101 Firefox/130.0

Steps to reproduce:

Until the last time, the drag and drop functionality worked just fine. The bug started to appear in firefox 128 (I think?), when I open dolphin file explorer (kubuntu 22.04, KDE plasma) and drag multiple files into drag and drop area, only one file appears. Try for yourself --> https://jsfiddle.net/9C2EF/ Select multiple files and drag into area. I tried in: firefox 128, firefox 130, also in private mode. Bug still appears. I tested in google chrome, everything works just fine.

Actual results:

Only one file appears in event.dataTransfer.files (I dragged 5 files)

Expected results:

Should be an array of files

Comment 1

[Sergey]

Hmm, I tested in GNOME file explorer, everything works just fine. It looks like that the bug only appears in KDE/Dolphin 🙄

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::DOM: Copy & Paste and Drag & Drop' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 3

[Alice0775 White]

I can reproduce the issue on Nightly130.a1, Firefox128.0 kubuntu22.04 KDE plasma 5.24.7.
Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=936287e7cba7e0a07179c59e7c9c74adaefdb47c&tochange=68955533eb96b6d019d77be1ec753b353827d5d0

(If I use Nemo or pcmanfm instead of Dolphin file manager, the the drag drop works as expected.)

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

:stransky, since you are the author of the regressor, bug 1881229, could you take a look?

For more information, please visit BugBot documentation.

Comment 5

[Ryan VanderMeulen [:RyanVM]]

Sounds like newer versions of Dolphin may have fixed this already. Do we have any contacts for getting this backported into 22.04 like the upstream bug suggests?

Comment 6

[Emilio Cobos Álvarez [:emilio]]

I think Alexandre is more involved with Canonical and he would know?

Comment 7

[:gerard-majax]

I don't think canonical manages kubuntu ?

Comment 8

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1881229

Comment 9

[quickishfm]

This happens to me also, using Arch Linux, firefox version 129.0-1 and Dolphin 24.05.2
so I don't think it's been fixed yet.

Comment 12

[:gerard-majax]

We now have reports on other distros (ArchLinux, Debian)

Comment 13

[aakumykov]

Attachment: mozregression--2024.05.01--2024.05.15.png

Comment 14

[aakumykov]

Attachment: mozregression--2024.05.01--2024.05.15.log

Comment 15

[aakumykov]

Attachment: manual-testing-firefox-128.0a1-from-2024.05.14-to-2024.05.31.png

Also I manually test FF nightly builds from https://ftp.mozilla.org/pub/firefox/nightly/2024/05/ and found point of bug first appears:

• firefox-128.0a1.en-US.linux-x86_64-2024-05-14-09-50-49 (dropped all items)
• firefox-128.0a1.en-US.linux-x86_64-2024-05-15-03-23-56 (dropped only first item)
• firefox-128.0a1.en-US.linux-x86_64-2024-05-17-21-53-59 (not dropped at all)
• firefox-128.0a1.en-US.linux-x86_64-2024-05-21-09-45-53 (not dropped at all)
• firefox-128.0a1.en-US.linux-x86_64-2024-05-31-21-30-29 (dropped only first item)

Comment 16

[aakumykov]

(In reply to aakumykov from comment #15)
Test case is https://dragdrop.com/test

Comment 17

[aakumykov]

Attachment: mozregression-from-2024-05-01.log

Comment 18

[aakumykov]

Mozregression from good point 2024-05-01 result (full log is attached also):

6:11.62 INFO: Narrowed integration regression window from [936287e7, a1cad969] (3 builds) to [936287e7, 68955533] (2 builds) (~1 steps left)
6:11.62 INFO: No more integration revisions, bisection finished.
6:11.62 INFO: Last good revision: 936287e7cba7e0a07179c59e7c9c74adaefdb47c
6:11.62 INFO: First bad revision: 68955533eb96b6d019d77be1ec753b353827d5d0
6:11.62 INFO: Pushlog:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=936287e7cba7e0a07179c59e7c9c74adaefdb47c&tochange=68955533eb96b6d019d77be1ec753b353827d5d0

Comment 19

[Ryan VanderMeulen [:RyanVM]]

That's the same regressor which was already identified in this bug

Comment 20

[Anquietas]

Hello,
I confirm this.
Kubuntu Desktop running KDE with Dolphin and Firefox. Installed Thunar for test purposes.
Dragging multiple files into Firefox browser window from Thunar marks all files for upload.
Dragging multiple files into Firefox browser window from Dolphin only marks one file for upload.
I need this to work properly as I am using drag and drop almost daily...

Comment 25

[Martin Stránský [:stransky] (ni? me) (PTO till June 6)]

I do see that now. It's a bug in processing text/x-moz-url MIME type, we rear only first item from the list.

Comment 26

[Martin Stránský [:stransky] (ni? me) (PTO till June 6)]

The problem here is that Dolphin sends us only one file as text/x-moz-url but posts complete list as text/plain.
It's interesting that it affects X11 Plasma session only - if I run Dolphin under GNOME/XWayland it works.
Only issue is with X11/Plasma.

Comment 27

[Martin Stránský [:stransky] (ni? me) (PTO till June 6)]

Regression from Bug 1881229 causes that we don't try to get URI list from text/plain any more. That was a hack and I don't want to introduce it again. Let's see if we can use text/uri-list as first choice. I see dolphin supports:

[Parent 48324: Main Thread]: D/WidgetDrag [D 1][7f0aa0065100]   adding drag context available flavor text/uri-list
[Parent 48324: Main Thread]: D/WidgetDrag [D 1][7f0aa0065100]   adding drag context available flavor text/x-moz-url
[Parent 48324: Main Thread]: D/WidgetDrag [D 1][7f0aa0065100]   adding drag context available flavor text/plain
[Parent 48324: Main Thread]: D/WidgetDrag [D 1][7f0aa0065100]   adding drag context available flavor application/x-kde4-urilist
[Parent 48324: Main Thread]: D/WidgetDrag [D 1][7f0aa0065100]   adding drag context available flavor application/vnd.portal.filetransfer
[Parent 48324: Main Thread]: D/WidgetDrag [D 1][7f0aa0065100]   adding drag context available flavor application/x-kde-source-id

so let's see if we can use something from it.

Comment 28

[Martin Stránský [:stransky] (ni? me) (PTO till June 6)]

Attachment: Bug 1908196 [Linux] Drag&Drop - try to get text/uri-list first and convert it to text/x-moz-url r?emilio

Try to get text/uri-list first and then fallback to text/x-moz-url.
text/x-moz-url MIME tends to be poorly supported by third party apps,
we got only one file instead of file list or nothing at all.

Comment 29

[Martin Stránský [:stransky] (ni? me) (PTO till June 6)]

As a simple fix we may uplift it to beta.

Comment 30

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/1a0df99b3a94
[Linux] Drag&Drop - try to get text/uri-list first and convert it to text/x-moz-url r=emilio

Comment 31

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/1a0df99b3a94

Comment 34

[Ryan VanderMeulen [:RyanVM]]

Do we need this on ESR128? Please nominate if so - it grafts cleanly.

Comment 35

[Martin Stránský [:stransky] (ni? me) (PTO till June 6)]

I'd need to test that on ESR first, not sure if we need another patch for it.

Comment 36

[Martin Stránský [:stransky] (ni? me) (PTO till June 6)]

Comment on attachment 9441772 [details]
Bug 1908196 [Linux] Drag&Drop - try to get text/uri-list first and convert it to text/x-moz-url r?emilio

ESR Uplift Approval Request

• If this is not a sec:{high,crit} bug, please state case for ESR consideration: Fixed D&D file operation on multiple targets.
• User impact if declined: D&D for more than one file may fail.
• Fix Landed on Version: 135
• Risk to taking this patch: Low
• Why is the change risky/not risky? (and alternatives if risky): Updates order of MIME formats request, ask for wide supported format first.

Comment 37

[Martin Stránský [:stransky] (ni? me) (PTO till June 6)]

Tested the patch on ESR128 and it works as expected.

Comment 38

[Ryan VanderMeulen [:RyanVM]]

Comment on attachment 9441772 [details]
Bug 1908196 [Linux] Drag&Drop - try to get text/uri-list first and convert it to text/x-moz-url r?emilio

Approved for 128.7esr.

Comment 39

[Pulsebot]

https://hg.mozilla.org/releases/mozilla-esr128/rev/cef6df13213d