Re: [screen-devel] Bug in rendering terminal application

[Maarten van Malland]

Hi,

Right, that explains it then. I've tried your encoding-rewrite branch
but that has exactly the same behavior as the master branch. For now,
I've just recompiled that application without the utf-8 specific
characters and everything is just fine.

As for the automated testsuite, I'm afraid I can't help you out there,
as I'm not a developer myself. However, if you would like me to test
something manually, I'm all yours...
On Tue, Jun 26, 2018 at 11:25 PM Amadeusz Sławiński <address@hidden> wrote:
>
> Hi,
>
> yes there are problems with how screen handles utf-8, rewriting
> encoding handling to be more manageable is still on my todo list.
>
> I already experimented a bit here 
> https://github.com/amade/screen/tree/encoding-rewrite
> but ultimately it needs spending quite some time on it and thinking how
> to handle verious stuff. For example there needs to be clean separation
> between strings that need to be char* and those that can be uint32_t*.
> And there is probably few more things that I don't remember right now.
>
> Ultimately it would be great if we also got some automated testsuite
> for how screen prints various characters. (If there are any takers it
> would be great ;) ).
>
> Amadeusz
>
> On Tue, 26 Jun 2018 22:31:55 +0200
> Maarten van Malland <address@hidden> wrote:
>
> > I've been digging around myself regarding this bug, and it seems the
> > problem is slightly different from what I previously thought. In the
> > source code of that application there are some special characters
> > being used as text. In a normal utf-8 terminal this is displayed as:
> >
> > 𝗚𝗔𝝡𝗘 𝗢𝗩𝗘𝗥!
> >
> > In ISO-8859-2 this is displayed as:
> >
> > đ<9d><97><9a>đ<9d><97><94>đ<9d><9d>Ąđ<9d><97><98>
> > đ<9d><97>˘đ<9d><97>Šđ<9d><97><98>đ<9d><97>Ľ!"
> >
> > However, in the master branch of Screen using utf-8 it is is displaying:
> >
> > 헚흡 헢험!
> >
> > Well, that's weird! For some reason Screen interprets that code as
> > Korean characters. Funny thing is that google translates it back as
> > "Take a breath!"; that's exactly what I'm doing right now ;).
> >
> >
> > On Mon, Jun 25, 2018 at 9:47 PM Maarten van Malland
> > <address@hidden> wrote:
> > >
> > > I think I've encountered a bug in the master branch with a specific
> > > terminal application: https://github.com/0xbsec/terminal2048 This
> > > application is working fine in several other terminals (termite, st,
> > > terminator) as well as within tmux, but for some reason the fonts are
> > > not rendered correctly within screen v5. In screen v4 it's not working
> > > at all, so my suspicion is that this application is using truecolor
> > > and screen v5 is having some issue with it. Any idea what might be
> > > going on here?
> >
>