Re: Does our xim process need an update?

On Thu, 16 Jul 2015 15:51:27 +0200,
Marguerite Su wrote:
> 
> On Thu, Jul 16, 2015 at 9:26 PM, Fuminobu TAKEYAMA <[email protected]> wrote:
> >> 0. Is there any way in shell script, that allows us to dynamically
> >> change input method framework without restart?
> >
> > GTK and Qt applications can switch its IM.
> > But I think there is no way to do from shell script.
> >
> > If we implement GTK IM module/Qt IM module/xim proxy, it could do that.
> 
> our current discussion focus on to replace xim method w/
> chameleon-tongue, and the most critical mission for all such
> technology is to properly set:
> 
> export LC_CTYPE=$LANG
> export XMODIFIERS="@im=fcitx"
> export GTK_IM_MODULE=fcitx
> export GTK3_IM_MODULE=fcitx
> export QT_IM_SWITCHER=imsw-multi
> export QT_IM_MODULE=fcitx
> export QT4_IM_MODULE=fcitx
> 
> to make input method framework take over users' input.

I thought GTK3_* and QT4_* are superfluous nowadays as Gtk3 and Qt4
look at GTK_* and QT_* variables as well?

> and all such
> applications/ways can only set input method globally once at system
> boot (I might be wrong about this).

Not at boot, but at each X session / login.

> after Xorg was started, there's no
> way to swich input method frameworks. My question is, is there such
> thing like:
> 
> export FCITX_ENV=`/usr/lib/inputmethod/scripts/check_if_fcitx_is_running_and_prefered.sh`
> export GTK_IM_MODULE=$FCITX_ENV
> 
> works. So when an application is started, it'll actually fetch
> GTK_IM_MODULE by running a script, which can check process of input
> method framework and /etc/sysconfig/inputmethod or something to find
> user preference. So you can switch from fcitx to ibus without the need
> to restart/logout.

I guess a wrapper like

#!/bin/sh
. /usr/lib/input-method/profile.d/auto/env
exec "$@"

would work.  But it's doubtful whether such a dynamic switch is really
demanded.  Even with this mechanism, an application needs to be
restart in anyway.  If a DE has some session management, it can
restart itself and restores the session after refreshing the
IM-related environment variables.

> Or we have to write an special im module named "imfd" or something to
> dynamically set and load input method frameworks?
> 
> BTW, I think along with shell scripts, ruby is also a good
> alternative, because every openSUSE installation have YaST and ruby
> :-)

Yes, but I don't think there won't be so complicated even in bash.
Let's see.


Takashi
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