Bug 454181

Try going into Settings --> Application --> File Associations
Search for .html there and change the top most application in the "Application Preference Order" page to Konqueror then try again

(In reply to Phos from comment #1)
> Try going into Settings --> Application --> File Associations
> Search for .html there and change the top most application in the
> "Application Preference Order" page to Konqueror then try again

I already have HTML files associated with konqueror, but ark anyway uses a "WebEngine viewer component".

Yeah, I just made a zipped .html test file.
I'm not quite sure this is something I can solve (since I can't code to save my life)

Can you try right clicking the .html file --> open with --> and ticking the "remember application preference" --> and selecting konqueror

See if that resolves the issue

(In reply to Phos from comment #3)
> Yeah, I just made a zipped .html test file.
> I'm not quite sure this is something I can solve (since I can't code to save
> my life)
> 
> Can you try right clicking the .html file --> open with --> and ticking the
> "remember application preference" --> and selecting konqueror
> 
> See if that resolves the issue

Doesn't solve the issue.

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

(In reply to Bug Janitor Service from comment #5)
> Dear Bug Submitter,
> 
> This bug has been in NEEDSINFO status with no change for at least
> 15 days. Please provide the requested information as soon as
> possible and set the bug status as REPORTED. Due to regular bug
> tracker maintenance, if the bug is still in NEEDSINFO status with
> no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
> due to lack of needed information.
> 
> For more information about our bug triaging procedures please read the
> wiki located here:
> https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging
> 
> If you have already provided the requested information, please
> mark the bug as REPORTED so that the KDE team knows that the bug is
> ready to be confirmed.
> 
> Thank you for helping us make KDE software even better for everyone!

All info is already provided.

Can you please attach a test archive that triggers this issue?

(In reply to Elvis Angelaccio from comment #7)
> Can you please attach a test archive that triggers this issue?

Happens with every single HTML file.

(In reply to David from comment #8)
> (In reply to Elvis Angelaccio from comment #7)
> > Can you please attach a test archive that triggers this issue?
> 
> Happens with every single HTML file.

Well, I can't reproduce it then.

It would also help a screenshot of what you are seeing.

Created attachment 152489 [details]
ark_blank_preview

Here's a screenshot of the empty preview that I see. The HTML for reference is this:
https://cran.r-project.org/web/packages/MatrixExtra/vignettes/Introducing_MatrixExtra.html

And the compressed file can be downloaded from here:
https://cran.r-project.org/src/contrib/MatrixExtra_0.1.13.tar.gz

FWIW, I have been experiencing this behaviour of a blank window (i.e., white background, no visible text) when trying to preview XML files for some time. Deciding I wanted to fix it, searching turned up this report.

On a whim, I tried switching from Breeze Dark to Breeze Light. After that, the Preview option brought up a readable window of black text on white background. *Except* it now put me into Kate to see it, *not* via Ark's internal Preview window.

And when I switched from Breeze Light back to Breeze Dark, that same behaviour - the Preview option opening up the XML in Kate - continued albeit now as white text on dark background.

This is with the current Debian Trixie using Wayland-based KDE6. I don't recall what I was running when the behaviour reported here first happened to me.

Hope this extra "data point" helps.

Hmmm, a few hours later, and tried the switch again between Breeze Dark and Breeze Light, and now the Preview screen is used both ways. And is white background with no text both ways.

(I was careful *both* this time *and* before to ensure I was clicking on "Preview" and not "Open in External Application" on the screen. Did it several times each time to reassure myself of the behaviour I was seeing.)

KDE's Info Centre reports the following:

- Operating System: Debian GNU/Linux 12
- KDE Plasma Version: 6.3.2
- KDE Frameworks Version: 6.11.0
- Qt Version: 6.8.2
- Kernel Version: 6.12.19-amd64 (64-bit)
- Graphics Platform: Wayland
- Processors: 12 × AMD Ryzen 5 5600X 6-Core Processor
- Memory: 62.7 GiB of RAM
- Graphics Processor: AMD Radeon RX 6600

Another data point: Kate's Print Preview displays a blank, white page when using the Breeze Dark theme. It displays with black text on white background when using Breeze Light theme.

Current details on my Debian Testing installation:
- Operating System: Debian GNU/Linux 12
- KDE Plasma Version: 6.3.2
- KDE Frameworks Version: 6.11.0
- Qt Version: 6.8.2
- Kernel Version: 6.12.20-amd64 (64-bit)
- Graphics Platform: Wayland
- Processors: 12 × AMD Ryzen 5 5600X 6-Core Processor
- Memory: 62.7 GiB of RAM
- Graphics Processor: AMD Radeon RX 6600