[Uim-bugs] [Bug 39242] New: no easy way to wait until uim-xim is ready

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=39242

           Summary: no easy way to wait until uim-xim is ready
           Product: UIM
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: medium
         Component: bridge: XIM
        AssignedTo: uim-bugs at freedesktop.org
        ReportedBy: d+bugzilla at vdr.jp


[ this is forwarded from http://bugs.debian.org/300486 ]

When using loading uim-xim and another program that needs to use it one
right after the other (e.g. in an .xsession) programs started after
uim-xim but before uim-xim is ready to service them can't use uim.

This comes up for me if I try to make an .xsession that looks something
like this:

uim-xim &
xterm

The xterm loads up after uim-xim has been started, but before it's ready
to accept connections from XIM clients. I can fix this by doing:

uim-xim &
sleep N
xterm

Where N=1 on most machines (like this one, a new amd64), but N=2 or 3 on some
really slow machines (notably, a heavily loaded PII-450 I have, so we're not
just saying hypothetically!)

It would be nice if there were an option to/wrapper for uim-xim that
allowed it to daemonize itself and only return to the caller when it was
not only daemonized, but actually ready to accept XIM clients. Then the
proposed .xsession could be something like:

uim-xim --daemonize
xterm

And everything would work nicely. =)

--------------------------------------------------

I was facing problem of starting uim-toolbar-gtk just like this bug
report.

My workaround of not really waiting ...

Wait short --> uim-toolbar-gtk does not work
---
uim-xim &
sleep 1
uim-toolbar-gtk &
----

Waiting long --> uim-toolbar-gtk works
---
uim-xim &
sleep 10
uim-toolbar-gtk &
----

Waiting smart --> uim-toolbar-gtk works
---
uim-xim &
(sleep 10 ; uim-toolbar-gtk ) &
----

So if the original bug reporter wishes xterm to start a bit later, there
is a decent work around which does not really slow down X start up. 

--------------------------------------------------

Xlib provides the way to do this, which is XRegisterIMInstantiateCallback.
It is up to clients to decide what should be done when an IM server is not
available.

--------------------------------------------------

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