[kde] [Bug 425419] New: Right-To-Left Text Breaks Emoji Flags

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=425419

            Bug ID: 425419
           Summary: Right-To-Left Text Breaks Emoji Flags
           Product: kde
           Version: unspecified
          Platform: Kubuntu Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: I3rav3 at gmail.com
  Target Milestone: ---

Created attachment 130909
  --> https://bugs.kde.org/attachment.cgi?id=130909&action=edit
Bug demonstration

SUMMARY
Whenever a flag emoji is used with a text that is inferred to be right to left,
it breaks, showing another flag or a flag with a question mark. This problem is
observed in both editable text (as in a text editor for example) and
non-editable text (as in the title of a Firefox window for example).

STEPS TO REPRODUCE
1. Choose any flag emoji (this one for example 🇯🇵).
2. Open any application where you can enter text (Kate for example) and paste
the flag emoji.
3. Enter text using a right-to-left language (Arabic or Hebrew for example)
either before or after the flag emoji.

OBSERVED RESULT
The flag emoji breaks, showing a flag with a question mark in this case.

EXPECTED RESULT
The flag emoji shouldn't change just because the text around it was inferred to
be right to left.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 20.04
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8

ADDITIONAL INFORMATION
1- Note that this problem only occurs if the text with the flag emoji is
inferred to be right to left. This inference depends on the first character
typed other than the emoji. If this character is right to left, the text is
inferred to be right to left, and the emoji breaks. If the first character
typed other than the emoji is left to right, the text is inferred to be left to
right, and the emoji won't break even if subsequently right-to-left characters
were used.

2- This problem is peculiar to flag emojis as far as I can tell. All other
emojis that I've encountered exhibit no problem with right-to-left text.

3- This problem is universal to KDE as far as I can tell, but is not universal
to all of the system (this problem isn't present in Firefox for example).

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