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Improve robustness of killing buffers

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* exwm-core.el (exwm-mode): Use the return value of
  exwm-manage--close-window.
* exwm-manage.el (exwm-manage--close-window): Kill empty buffers; Handle X
  windows that does not support _NET_WM_PING.
  (exwm-manage--kill-client): Kill X windows supporting _NET_WM_PID with
  both SIGKILL and KillClient.
This commit is contained in:
Chris Feng 2015-10-29 18:31:16 +08:00
parent d9b4ba0265
commit b2ee102051
2 changed files with 40 additions and 32 deletions
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3
exwm-core.el
View file

@ -139,8 +139,7 @@
;; Kill buffer -> close window
(add-hook 'kill-buffer-query-functions
(lambda ()
(exwm-manage--close-window exwm--id (current-buffer))
nil)
(exwm-manage--close-window exwm--id (current-buffer)))
nil t)
(setq buffer-read-only t
left-margin-width nil

69
exwm-manage.el
View file

@ -249,6 +249,8 @@ corresponding buffer.")
(defun exwm-manage--close-window (id &optional buffer)
"Close window ID in a proper way."
(catch 'return
(unless (exwm--id->buffer id)
(throw 'return t))
(unless buffer (setq buffer (exwm--id->buffer id)))
;; Destroy the client window if it does not support WM_DELETE_WINDOW
(unless (and (buffer-live-p buffer)
@ -268,31 +270,33 @@ corresponding buffer.")
exwm--connection)))
(xcb:flush exwm--connection)
;; Try to determine if the client stop responding
;; FIXME: check
(with-current-buffer buffer
(when (memq xcb:Atom:_NET_WM_PING exwm--protocols)
(setq exwm-manage--ping-lock t)
(xcb:+request exwm--connection
(make-instance 'xcb:SendEvent
:propagate 0 :destination id
:event-mask xcb:EventMask:NoEvent
:event (xcb:marshal
(make-instance 'xcb:ewmh:_NET_WM_PING
:window id :timestamp 0
:client-window id)
exwm--connection)))
(xcb:flush exwm--connection)
(with-timeout (exwm-manage-ping-timeout
(if (yes-or-no-p (format "\
`%s' is not responding. Would you like to kill it? " (buffer-name buffer)))
(progn (exwm-manage--kill-client id)
(throw 'return nil))
(throw 'return nil)))
(while (and exwm-manage--ping-lock
(exwm--id->buffer id)) ;may have be destroyed
(accept-process-output nil 0.1)))
(throw 'return nil)))
(throw 'return nil)))
(unless (memq xcb:Atom:_NET_WM_PING exwm--protocols)
;; Ensure it's dead
(run-with-timer exwm-manage-ping-timeout nil
`(lambda () (exwm-manage--kill-client ,id)))
(throw 'return nil))
(setq exwm-manage--ping-lock t)
(xcb:+request exwm--connection
(make-instance 'xcb:SendEvent
:propagate 0 :destination id
:event-mask xcb:EventMask:NoEvent
:event (xcb:marshal
(make-instance 'xcb:ewmh:_NET_WM_PING
:window id :timestamp 0
:client-window id)
exwm--connection)))
(xcb:flush exwm--connection)
(with-timeout (exwm-manage-ping-timeout
(if (yes-or-no-p (format "`%s' is not responding. \
Would you like to kill it? "
(buffer-name buffer)))
(progn (exwm-manage--kill-client id)
(throw 'return nil))
(throw 'return nil)))
(while (and exwm-manage--ping-lock
(exwm--id->buffer id)) ;may have been destroyed
(accept-process-output nil 0.1))))))
(defun exwm-manage--kill-client (&optional id)
"Kill an X client."
@ -300,12 +304,17 @@ corresponding buffer.")
(unless id (setq id (exwm--buffer->id (current-buffer))))
(let* ((response (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:ewmh:get-_NET_WM_PID :window id)))
(pid (and response (slot-value response 'value))))
(if pid
(signal-process pid 'SIGKILL)
(xcb:+request exwm--connection
(make-instance 'xcb:KillClient :resource id))
(xcb:flush exwm--connection))))
(pid (and response (slot-value response 'value)))
(request (make-instance 'xcb:KillClient :resource id)))
(if (not pid)
(xcb:+request exwm--connection request)
;; What if the PID is fake/wrong?
(signal-process pid 'SIGKILL)
;; Ensure it's dead
(run-with-timer exwm-manage-ping-timeout nil
`(lambda ()
(xcb:+request exwm--connection ,request))))
(xcb:flush exwm--connection)))
(defun exwm-manage--on-ConfigureRequest (data _synthetic)
"Handle ConfigureRequest event."