https://bugs.kde.org/show_bug.cgi?id=510501
Bug ID: 510501
Summary: Clipboard breaks if application only sends metadata,
with other cases where list entries are valid but
visually empty
Classification: Plasma
Product: plasmashell
Version First 6.4.5
Reported In:
Platform: NixOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Clipboard widget & pop-up
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: 1.0
Created attachment 185697
--> https://bugs.kde.org/attachment.cgi?id=185697&action=edit
2 images side by side depicting both issues described above, one showing a
valid copy appearing as an empty clipboard entry, and an empty clipboard entry
not appearing at all
SUMMARY
When copying to the clipboard, some applications may only supply metadata i;e
chromium/x-.... and no actual paste-able data, leading to the current, empty
clipboard entry not appearing in the history. This also causes these menus to
break where clicking on the top entry in the list (which is technically below
the invisible clipboard entry) to do nothing.
STEPS TO REPRODUCE
1. Hit ctrl-c without selecting text in an application such as Discord (I was
able to reproduce this with Vesktop)
OBSERVED RESULT
The clipboard history hasn't changed, but the clipboard content in the kwin
debug console has changed to show a basically empty entry with just metadata on
the application. Pasting in this state should also do nothing since the top
entry logged by kwin has no data in it.
EXPECTED RESULT
Plasma ignores the empty copy since the application didn't actually send in a
complete clipboard object. There are related issues to this where the clipboard
history shows an empty box when there isn't a good way to represent the
content, like when copying an image in a google doc (kwin shows html content in
the clipboard but there are also a bunch of plaintext mime types that are
empty, the clipboard should have a fallback to avoid displaying an empty box).
SOFTWARE/OS VERSIONS
Operating System: NixOS 25.11 (unstable)
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.18.0
Qt Version: 6.9.2
Kernel Version: 6.17.1 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5800X3D 8-Core Processor
Memory: 32 GiB of RAM (31.3 GiB usable)
Graphics Processor: AMD Radeon RX 7800 XT
ADDITIONAL INFORMATION
I've attached an image showing both cases of mangled clipboard states, one
where copying an image in a google doc correctly copies the content, but it
creates an empty entry in the clipboard menu. The other image (right) shows the
results of hitting ctrl-c in Vesktop without selecting anything, resulting in
the clipboard history not showing a new entry at all, and the kwin debugger
showing that there is an entry, just with no data. Sorry about the image
quality, spectacle doesn't seem to work for internal windows.
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