[Bug]: A post causes a UI overflow on Tuba App

[kop316]

Describe the bug

Hello!

This post seems to cause an overflow of the UI of the Tuba App: https://akkoma.meows.gay/objects/b0dcc9c5-ece9-49eb-a83a-7c2b8b60c1bd

Screenshot:

Steps To Reproduce

1. Follow that account
2. 2. Have it show up on your Home feed.

Logs and/or Screenshots

<paste your logs here>

Instance Backend

Mastodon

Operating System

Debian Trixie

Package

OS repositories

Troubleshooting information

No response

Additional Context

No response

[GeopJr]

That's not it (or at least it's doesn't reproduce it here)

In general, the issue is with GtkLabel + ellipsize + wrap measuring the widget size incorrectly. GtkLabels are beyond broken under multiple containers, see this one for another example #756 (comment)

It has been reported again #719 and again #632 and again #626 and many other times, but unless I get the post (or rather label) actually causing it, reproducibly, I can't really do anything, including creating a minimal reproduction so gtk fixes it or a workaround from our side

Finding which one is actually causing it is also somewhat difficult as you have to play around with the inspector until you figure it out, which is likely to crash a few times. I don't expect anyone to go through that but I'm still throwing it out there just in case

[GeopJr]

Though, from the looks of it you are also using an older version of Tuba, it might have been fixed on 0.7 🤷

[kop316]

Ahh, thanks for that. You are correct, that was the wrong post. I think I found the correct post that causes it: https://fosstodon.org/deck/@[email protected]/112287918084026585

[kop316]

It looks like since this is a duplicate, it doesn't make sense to keep open.

[GeopJr]

Thanks for figuring it out!

I'll re-open this as they are mostly case-by-case. I'll see about writing a workaround!

[GeopJr]

Okay so, GtkLabel reports a larger min width that natural. This can be fixed by removing the overflow workaround but then we need to fix that. So for now, I'll say blocked by https://gitlab.gnome.org/GNOME/gtk/-/issues/6637 and see how it goes

[Newbytee]

This post also messes up the layout for me: https://misskey.fryer.net.au/notes/9zi3esm0yk

[GeopJr]

Can reproduce, thanks!

[GeopJr]

I'm just going to post this here for future reference:

• Pango/GtkLabel issue
• Has to do with GtkLabel's minimum width being > natural width for height, only when there are custom shapes (/ custom emojis)
• Setting pango wrap to word from word_char seems to fix it, who knows what it broke however 🤷
• There are already way too many hacks around wrapping to avoid bugs such as https://gitlab.gnome.org/GNOME/gtk/-/issues/6637

[bugaevc]

Ahem... I still hope to eventually fix all of this from GTK side, once and for all. But evidently this is taking longer than expected, and I understand that you want to ship a non-broken app now (which I as a user only appreciate).

But please avoid doing anything (e.g.: designing LWW to fundamentally rely on hacks) that would prevent you from just doing the supported, straightforward thing in the future, once GtkLabel is fixed to just work. And please share any feedback (the more the better!) on what GtkLabel behavior/features would actually be useful for you. This was the little piece of feedback that you shared last time, and that was very useful, and caused me to reevaluate how I want this to work.

[GeopJr]

Thanks, I appreciate all your work on fixing GtkLabel 🙇

As it stands, #1172 is not that big of a deal, it just changes wrapping from word_char to word. It might cause wrapping to not be as nice as it was but it's preferred over having your whole timeline broken just because of a single post

And please share any feedback (the more the better!) on what GtkLabel behavior/features would actually be useful for you.

Well, the obvious one would be, adding custom widgets but... it's a very niche use that is more likely to make GtkLabel even more complex. So the second best solution, would probably be unsealing GtkLabel so I can freely manipulate its aria label and measuring, but I don't think anyone involved will be interested in that 😅

Other than that, if you go deep into pango stuff, <bdi> markup to isolate bi-directional characters would be useful #603, even for gnome-shell #603 (comment)

And RTL languages are not always detected (?) #16, I can't remember the specifics, this was very early in tuba's lifespan, but I ended up using a regex and set xalign manually