Since starting to use StumpWM, I've noticed an issue with IntelliJ IDEA
sometimes losing focus in some weird way. What happens is that IDEA has
focus, some keypresses work, but the cursor isn't visible and I can't type
text into the edit buffers.
I finally came up with a workaround that works for IDEA, but I've been told
this is an issue for all Java applications, so perhaps it should be adopted
as a more general feature?
Here's the code I've added to my $HOME/.stumpwm.d/init.lisp to fix this:
(defun handle-focus-window-update (win cw)
(declare (ignore cw))
(when (and (member :WM_TAKE_FOCUS (xlib:wm-protocols (window-xwin
win)) :test #'eq)
(equal (window-class win) "jetbrains-idea")
(eq (window-type win) :normal))
(stumpwm::send-client-message win :WM_PROTOCOLS
(xlib:intern-atom *display*
:WM_TAKE_FOCUS)
0)))
(add-hook stumpwm:*focus-window-hook* 'handle-focus-window-update)
Would it be correct to always send the :WM_TAKE_FOCUS message to any client
that supports the message? I've read the ICCCM spec, and it's still not
entirely clear to me. In fact, I'm not sure I understand what the purpose
of the message is in the first place, and only Java seems to behave the way
it does.
Also, my current hack ends up sending the message twice (once from my code,
and once from StumpWM itself) when switching frames using FNEXT. That
doesn't seem to have any negative impact though, but a proper solution
should of course not do that.
Regards,
Elias
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