[kde] [Bug 370950] New: KDE 5 no longer supports XIM key-compose table

[Dominik via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=370950

            Bug ID: 370950
           Summary: KDE 5 no longer supports XIM key-compose table
           Product: kde
           Version: unspecified
          Platform: Gentoo Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: dom at qvasartech.com

I use a lot of customized composed keys in all applications, particularly text
editors — entering arrows, various types of bullets, greek and arabic letters
with accents, as well as typographically correct spaces and dashes (thin space,
figure space, quads, em-dash, en-dash etc.), to mention just some of the most
important ones.
These key compositions are defined in /usr/share/X11/locale/en_US.UTF-8/Compose
on my Gentto Linux system, and can be edited to suit a user's needs … my
Compose file e.g. is about three times the size of what has been installed
initially.
Up to KDE 4, it was possible to define the input method like this for QT and
GTK apps:
export GTK_IM_MODULE=xim
export XMODIFIERS=@im=xim
export QT_IM_MODULE=xim
in a location that changed with X and KDE versions, but finally ended up in an
X resource file in /etc/X11/xinit/xinitrc.d/.
Now this doesn't work any longer, and I didn't find a way to make it work
either after trying the obvious things and searching my system and Google for
hours — there is no information available about the correct setup for key
composition or setting the input method to XIM in KDE 5+

Now, since this was an important feature that is now gone, and apparently no
workaround is available in the public domain, I file it as a bug.

Reproducible: Always

Steps to Reproduce:
1. Setup key composition in KDE4 as described, adding some custom keys
2. Verify that the specified keys can indeed by entered in a) Konsole, Kwrite,
Kate and b) Firefox, GIMP etc.
3. Upgrade to KDE 5
4. Try the same compose-key sequences

Actual Results:  
The sequences do not work any longer.

Expected Results:  
The same result as in KDE 4.

Key composition as such does work in KDE 5, but the key set is neither
changable nor extensible as far as I can see.
I expect one central key composition table for the whole system that can be
changed and extended, like it was with earlier KDE versions — even if it means
that the standard input method must be configurable and that a user has to set
it manually.

This is a major feature for me.  My work-around is to open the Character
Selector and copy-paste the necessary keys after searching the Unicode table …
which slows down my work to about 10% when I'm writing manuals and other
professional texts that require a lot of compose keys.

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