[konsole] [Bug 464823] New: Soft hyphens are incorrectly displayed as normal spaces

[Karl Ove Hufthammer]

https://bugs.kde.org/show_bug.cgi?id=464823

            Bug ID: 464823
           Summary: Soft hyphens are incorrectly displayed as normal
                    spaces
    Classification: Applications
           Product: konsole
           Version: master
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: font
          Assignee: konsole-devel at kde.org
          Reporter: karl at huftis.org
  Target Milestone: ---

SUMMARY
When text contains soft hyphens, the soft hyphen characters (U+00AD) are now
displayed as normal spaces. They should instead be invisible, and used to be
so, so this is a regression. I did a ‘git bisect’, and it looks like the bug
was introduced in this commit:

commit 76f879cd70fb494ab2334d2660b34679546f3d9d
Author: Matan Ziv-Av <matan at svgalib.org>
Date:   Sat Aug 6 19:15:42 2022 +0300

    Draw characters in exact positions
    […]


STEPS TO REPRODUCE
1. Run the following command in Konsole:
   echo -e
'super\u00adcali\u00adfragi\u00adlistic\u00adexpi\u00adali\u00addocious'


OBSERVED RESULT
The text is displayed as:
super ­cali ­fragi ­listic ­expi ­ali ­docious


EXPECTED RESULT
The text should be displayed as:
supercalifragilisticexpialidocious


SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20230123
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8
Kernel Version: 6.1.7-1-default (64-bit)
Graphics Platform: X11
Processors: 4 × Intel® Core™ i5-2500 CPU @ 3.30GHz
Memory: 15.6 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 1060 3GB/PCIe/SSE2
Manufacturer: MSI
Product Name: MS-7673
System Version: 1.0

ADDITIONAL INFORMATION
If the word comes at the end of a line and causes the word to be split over two
lines *at the soft hyphen*, the soft hyphen should really be displayed as a
*normal* hyphen instead of being invisible. This is the way soft hyphens
normally work, e.g., in Kate. But I guess this is a less important feature for
a terminal application, which usually doesn’t do any real word wrapping. Just
thought I would mention it.

And regarding the use of soft hyphens: I’m a translator of KDE applications,
and we use soft hyphens a lot in our translations, also for command-line
applications. This bug causes the output (e.g., of ’--help’) to look incorrect
(long words are being split).

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