[screen-devel] [bug #55138] Bug: UTF-8 characters in hardstatus not working

[Elof]

URL:
  <https://savannah.gnu.org/bugs/?55138>

                 Summary: Bug: UTF-8 characters in hardstatus not working
                 Project: GNU Screen
            Submitted by: elof
            Submitted on: Fri 30 Nov 2018 11:59:03 AM UTC
                Category: User Interface
                Severity: 3 - Normal
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.6.2
           Fixed Release: None
         Planned Release: None
           Work Required: None

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Details:

I have utf-8 problems in hardstatus even with the latest screen 4.6.2 from
2017.


# screen --version
Screen version 4.06.02 (GNU) 23-Oct-17


How to reproduce:
I press <ctrl-a + A> and change the window title to include a Swedish utf-8
character (like 'å' (an 'a' with a ring above it)).
If I now press <ctrl-a + "> to show the window-list, everything looks good. I
see the Swedish title correct. :-)
In the screen windows themselves (the terminal windows), my UTF-8 characters
work perfectly fine. :-)

Everything is working as intended as long as I don't have a hardstatus line.

If I let the hardstatus string print the window titles:

  hardstatus on
  hardstatus alwayslastline
  hardstatus string '%{=b wK}  %n  %{Kw}  %t  %=@ %H  %{wk}  %D %M %d  %c  '

...then the last line will show a garbage character instead of the Swedish
'å' character.
Also there will be some internal miscalculation of the string length,
resulting in incorrect background coloring on the last lines.

In my terminal I see that the 'å' character is a two-byte-char:

# echo -n a | wc -c
1
# echo -n å | wc -c
2


(My terminal = xterm, running on Debian 9)

/Elof





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