Grab & Replay key events with XI2 and XTEST
; A change has been made in Xorg server 1.20 that replaying a key ; event with keyboard grabbed would generate extra focus change and ; enter/leave events. This basically breaks line-mode for apps like ; Firefox. This commit reimplements the grab & replay functionality ; with XI2 and XTEST. * exwm-input.el (exwm-input--devices): New variable for caching slave keyboards. (exwm-input--update-devices): Update it and re-grab keys if necessary. (exwm-input--on-Hierarchy): Event listener for the Hierarchy event that would in turn call `exwm-input--update-devices' to update the cache. * exwm-input.el (exwm-input--on-KeyPress): Use XI2 KeyPress events. (exwm-input--on-KeyRelease): Event listener for the KeyRelease events. (exwm-input--grab-global-prefix-keys): Use XI2 and also select KeyRelease events. (exwm-input--on-KeyPress-line-mode): Use XI2 KeyPress events and replay key events with XTEST. (exwm-input--on-KeyPress-char-mode, exwm-input--grab-keyboard) (exwm-input--release-keyboard): Use XI2 KeyPress events. * exwm-input.el (exwm-input--init): Initialize the XI2 and XTEST extensions; add listeners for XI2 KeyPress, KeyRelease and Hierarchy events.
This commit is contained in:
Chris Feng
parent
b75c89cae2
commit
0680be104f
1 changed files with 222 additions and 85 deletions
235
exwm-input.el
235
exwm-input.el
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@ -36,6 +36,9 @@
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;;; Code:
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(require 'xcb-keysyms)
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(require 'xcb-xinput)
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(require 'xcb-xtest)
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(require 'exwm-core)
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(defgroup exwm-input nil
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@ -102,6 +105,8 @@ defined in `exwm-mode-map' here."
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(defconst exwm-input--update-focus-interval 0.01
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"Time interval (in seconds) for accumulating input focus update requests.")
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(defvar exwm-input--devices nil "List of slave keyboard devices.")
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(defvar exwm-input--during-command nil
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"Indicate whether between `pre-command-hook' and `post-command-hook'.")
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@ -364,6 +369,44 @@ ARGS are additional arguments to CALLBACK."
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:window exwm--root
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:data (or id xcb:Window:None))))
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(defun exwm-input--update-devices (update)
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"Update the cache of slave keyboards."
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(with-slots (infos)
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(xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:xinput:XIQueryDevice
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:deviceid xcb:xinput:Device:All))
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(setq exwm-input--devices
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(delq nil
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(mapcar (lambda (info)
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(with-slots (deviceid type enabled name) info
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(setq name (downcase name))
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(when (and (= xcb:xinput:DeviceType:SlaveKeyboard
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type)
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(string-match-p "keyboard" name)
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;; Exclude XTEST keyboard.
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(not (string-match-p "xtest" name)))
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deviceid)))
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infos)))
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(unless exwm-input--devices
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(error "Failed to retrieve keyboards"))
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(when update
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;; Try to re-grab all keys.
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(exwm-input--update-global-prefix-keys)
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(dolist (pair exwm--id-buffer-alist)
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(with-current-buffer (cdr pair)
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(when exwm--keyboard-grabbed
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(exwm-input--grab-keyboard (car pair))))))))
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(defun exwm-input--on-Hierarchy (data _synthetic)
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"Handle Hierarchy events."
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(let ((evt (make-instance 'xcb:xinput:Hierarchy)))
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(xcb:unmarshal evt data)
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(with-slots (flags infos) evt
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(when (/= 0 (logand flags
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(logior xcb:xinput:HierarchyMask:SlaveAdded
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xcb:xinput:HierarchyMask:SlaveRemoved)))
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(exwm-input--update-devices t)))))
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(defun exwm-input--on-ButtonPress (data _synthetic)
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"Handle ButtonPress event."
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(let ((obj (make-instance 'xcb:ButtonPress))
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@ -417,12 +460,30 @@ ARGS are additional arguments to CALLBACK."
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(defun exwm-input--on-KeyPress (data _synthetic)
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"Handle KeyPress event."
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(let ((obj (make-instance 'xcb:KeyPress)))
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(let ((obj (make-instance 'xcb:xinput:KeyPress)))
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(xcb:unmarshal obj data)
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(if (eq major-mode 'exwm-mode)
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(funcall exwm--on-KeyPress obj data)
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(exwm-input--on-KeyPress-char-mode obj))))
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(defun exwm-input--on-KeyRelease (data _synthetic)
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"Handle KeyRelease event."
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;; TODO: For simplicity every KeyRelease event is replayed which is likely
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;; to cause overheads and perhaps problems.
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(let ((evt (make-instance 'xcb:xinput:KeyRelease)))
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(xcb:unmarshal evt data) ;FIXME: optimize.
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(with-slots (deviceid detail root-x root-y) evt
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(xcb:+request exwm--connection
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(make-instance 'xcb:xtest:FakeInput
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:type 3 ;KeyRelease
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:detail detail
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:time xcb:Time:CurrentTime
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:root exwm--root
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:rootX root-x
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:rootY root-y
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:deviceid deviceid))
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(xcb:flush exwm--connection))))
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(defun exwm-input--on-CreateNotify (data _synthetic)
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"Handle CreateNotify events."
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(let ((evt (make-instance 'xcb:CreateNotify)))
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@ -445,29 +506,44 @@ ARGS are additional arguments to CALLBACK."
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'children))))))
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(defun exwm-input--grab-global-prefix-keys (&rest xwins)
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(let ((req (make-instance 'xcb:GrabKey
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:owner-events 0
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(let ((req (make-instance 'xcb:xinput:XIPassiveGrabDevice
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:time xcb:Time:CurrentTime
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:grab-window nil
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:modifiers nil
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:key nil
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:pointer-mode xcb:GrabMode:Async
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:keyboard-mode xcb:GrabMode:Async))
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keysym keycode)
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:cursor 0
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:detail nil
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:deviceid nil
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:num-modifiers 1
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:mask-len 1
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:grab-type xcb:xinput:GrabType:Keycode
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:grab-mode xcb:xinput:GrabMode22:Sync
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:paired-device-mode 0
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:owner-events xcb:xinput:GrabOwner:NoOwner
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:mask (list
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(logior xcb:xinput:XIEventMask:KeyPress
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xcb:xinput:XIEventMask:KeyRelease))
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:modifiers nil))
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keysym keycode sequences)
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(dolist (k exwm-input--global-prefix-keys)
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(setq keysym (xcb:keysyms:event->keysym exwm--connection k)
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keycode (xcb:keysyms:keysym->keycode exwm--connection
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(car keysym)))
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(setf (slot-value req 'modifiers) (cdr keysym)
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(slot-value req 'key) keycode)
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(setf (slot-value req 'modifiers) (list (cdr keysym))
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(slot-value req 'detail) keycode)
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(dolist (device exwm-input--devices)
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(setf (slot-value req 'deviceid) device)
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(dolist (xwin xwins)
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(setf (slot-value req 'grab-window) xwin)
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(xcb:+request exwm--connection req)
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(setq sequences (append sequences
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(list (xcb:+request exwm--connection req))))
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;; Also grab this key with num-lock mask set.
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(when (/= 0 xcb:keysyms:num-lock-mask)
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(setf (slot-value req 'modifiers)
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(logior (cdr keysym) xcb:keysyms:num-lock-mask))
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(xcb:+request exwm--connection req))))
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(xcb:flush exwm--connection)))
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(list (logior (cdr keysym) xcb:keysyms:num-lock-mask)))
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(setq sequences (append sequences
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(list (xcb:+request exwm--connection
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req))))))))
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(dolist (sequence sequences)
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(xcb:+reply exwm--connection sequence))))
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(defun exwm-input--set-key (key command)
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(global-set-key key command)
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@ -563,10 +639,11 @@ instead."
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(defun exwm-input--on-KeyPress-line-mode (key-press raw-data)
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"Parse X KeyPress event to Emacs key event and then feed the command loop."
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(with-slots (detail state) key-press
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(let ((keysym (xcb:keysyms:keycode->keysym exwm--connection detail state))
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event raw-event mode)
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(when (and (/= 0 (car keysym))
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(with-slots (deviceid detail root-x root-y mods) key-press
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(let* ((state (slot-value mods 'effective))
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(keysym (xcb:keysyms:keycode->keysym exwm--connection detail state))
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event raw-event)
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(if (and (/= 0 (car keysym))
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(setq raw-event (xcb:keysyms:keysym->event
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exwm--connection (car keysym)
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(logand state (lognot (cdr keysym)))))
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@ -585,37 +662,47 @@ instead."
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(vector event)))
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(lookup-key (current-local-map) (vector event))
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(gethash event exwm-input--simulation-keys)))
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(setq mode xcb:Allow:AsyncKeyboard)
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(progn
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(exwm-input--cache-event event)
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(exwm-input--unread-event raw-event))
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(unless mode
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(if (= 0 (logand #x6000 state)) ;Check the 13~14 bits.
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;; Not an XKB state; just replay it.
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(setq mode xcb:Allow:ReplayKeyboard)
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(if (/= 0 (logand #x6000 state)) ;Check the 13~14 bits.
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;; An XKB state; sent it with SendEvent.
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;; FIXME: Can this also be replayed?
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;; FIXME: KeyRelease events are lost.
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(setq mode xcb:Allow:AsyncKeyboard)
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(xcb:+request exwm--connection
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(make-instance 'xcb:SendEvent
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:propagate 0
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:destination (slot-value key-press 'event)
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:event-mask xcb:EventMask:NoEvent
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:event raw-data)))
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:event raw-data))
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;; Replay the key.
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(xcb:+request exwm--connection
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(make-instance 'xcb:xtest:FakeInput
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:type 2 ;KeyPress
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:detail detail
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:time xcb:Time:CurrentTime
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:root exwm--root
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:rootX root-x
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:rootY root-y
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:deviceid deviceid)))
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;; Make Emacs aware of this event when defining keyboard macros.
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(when (and defining-kbd-macro event)
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(set-transient-map '(keymap (t . (lambda () (interactive)))))
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(exwm-input--unread-event event)))
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(xcb:+request exwm--connection
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(make-instance 'xcb:AllowEvents
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:mode mode
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:time xcb:Time:CurrentTime))
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(make-instance 'xcb:xinput:XIAllowEvents
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:time xcb:Time:CurrentTime
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:deviceid deviceid
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:event-mode xcb:xinput:EventMode:AsyncDevice
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:touchid 0
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:grab-window 0))
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(xcb:flush exwm--connection))))
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(defun exwm-input--on-KeyPress-char-mode (key-press &optional _raw-data)
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"Handle KeyPress event in char-mode."
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(with-slots (detail state) key-press
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(let ((keysym (xcb:keysyms:keycode->keysym exwm--connection detail state))
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(with-slots (deviceid detail mods) key-press
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(let* ((state (slot-value mods 'effective))
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(keysym (xcb:keysyms:keycode->keysym exwm--connection detail state))
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event raw-event)
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(when (and (/= 0 (car keysym))
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(setq raw-event (xcb:keysyms:keysym->event
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@ -628,12 +715,15 @@ instead."
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(setq exwm-input--temp-line-mode t)
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(exwm-input--grab-keyboard)
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(exwm-input--cache-event event)
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(exwm-input--unread-event raw-event)))))
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(exwm-input--unread-event raw-event))))
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(xcb:+request exwm--connection
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(make-instance 'xcb:AllowEvents
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:mode xcb:Allow:AsyncKeyboard
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:time xcb:Time:CurrentTime))
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(xcb:flush exwm--connection))
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(make-instance 'xcb:xinput:XIAllowEvents
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:time xcb:Time:CurrentTime
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:deviceid deviceid
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:event-mode xcb:xinput:EventMode:AsyncDevice
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:touchid 0
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:grab-window 0))
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(xcb:flush exwm--connection)))
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(defun exwm-input--update-mode-line (id)
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"Update the propertized `mode-line-process' for window ID."
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@ -667,15 +757,30 @@ instead."
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"Grab all key events on window ID."
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(unless id (setq id (exwm--buffer->id (window-buffer))))
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(when id
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(when (xcb:+request-checked+request-check exwm--connection
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(make-instance 'xcb:GrabKey
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:owner-events 0
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(let ((sequences
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(mapcar
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(lambda (device)
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(xcb:+request exwm--connection
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(make-instance 'xcb:xinput:XIPassiveGrabDevice
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:time xcb:Time:CurrentTime
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:grab-window id
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:modifiers xcb:ModMask:Any
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:key xcb:Grab:Any
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:pointer-mode xcb:GrabMode:Async
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:keyboard-mode xcb:GrabMode:Sync))
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(exwm--log "Failed to grab keyboard for #x%x" id))
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:cursor 0
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:detail xcb:Grab:Any
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:deviceid device
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:num-modifiers 1
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:mask-len 1
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:grab-type xcb:xinput:GrabType:Keycode
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:grab-mode xcb:xinput:GrabMode22:Sync
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:paired-device-mode 0
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:owner-events xcb:xinput:GrabOwner:NoOwner
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:mask
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(list
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(logior xcb:xinput:XIEventMask:KeyPress
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xcb:xinput:XIEventMask:KeyRelease))
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:modifiers (list 2147483648.))))
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exwm-input--devices)))
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(dolist (sequence sequences)
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(xcb:+reply exwm--connection sequence)))
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(with-current-buffer (exwm--id->buffer id)
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(setq exwm--on-KeyPress #'exwm-input--on-KeyPress-line-mode))))
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@ -683,12 +788,16 @@ instead."
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"Ungrab all key events on window ID."
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(unless id (setq id (exwm--buffer->id (window-buffer))))
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(when id
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(when (xcb:+request-checked+request-check exwm--connection
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(make-instance 'xcb:UngrabKey
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:key xcb:Grab:Any
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(dolist (device exwm-input--devices)
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(xcb:+request exwm--connection
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(make-instance 'xcb:xinput:XIPassiveUngrabDevice
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:grab-window id
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:modifiers xcb:ModMask:Any))
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(exwm--log "Failed to release keyboard for #x%x" id))
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:detail xcb:Grab:Any
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:deviceid device
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:num-modifiers 1
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:grab-type xcb:xinput:GrabType:Keycode
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:modifiers (list 2147483648.)))) ;1 << 31
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(xcb:flush exwm--connection)
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(exwm-input--grab-global-prefix-keys id)
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(with-current-buffer (exwm--id->buffer id)
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(setq exwm--on-KeyPress #'exwm-input--on-KeyPress-char-mode))))
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@ -930,6 +1039,30 @@ where both ORIGINAL-KEY and SIMULATED-KEY are key sequences."
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(defun exwm-input--init ()
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"Initialize the keyboard module."
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;; Initialize the XI2 extension.
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(if (= 0 (slot-value (xcb:get-extension-data exwm--connection 'xcb:xinput)
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'present))
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(error "[EXWM] XI2 extension is not supported by the server")
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(with-slots (major-version minor-version)
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(xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:xinput:XIQueryVersion
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:major-version 2
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:minor-version 0))
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(when (or (/= major-version 2) (/= minor-version 0))
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(error "[EXWM] XI2 extension 2.0 is not supported by the server"))))
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(exwm-input--update-devices nil)
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;; Initialize the XTEST extension.
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(if (= 0 (slot-value (xcb:get-extension-data exwm--connection 'xcb:xtest)
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'present))
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(error "[EXWM] XTEST extension is not supported by the server")
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(with-slots (major-version minor-version)
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(xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:xtest:GetVersion
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:major-version 2
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:minor-version 2))
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(when (or (/= major-version 2) (/= minor-version 2))
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(error "[EXWM] XTEST extension 2.2 is not supported by the server"))))
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;; Refresh keyboard mapping
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(xcb:keysyms:init exwm--connection #'exwm-input--on-keysyms-update)
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;; Create the X window and intern the atom used to fetch timestamp.
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@ -970,7 +1103,11 @@ where both ORIGINAL-KEY and SIMULATED-KEY are key sequences."
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(xcb:+event exwm--connection 'xcb:PropertyNotify
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#'exwm-input--on-PropertyNotify)
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(xcb:+event exwm--connection 'xcb:CreateNotify #'exwm-input--on-CreateNotify)
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(xcb:+event exwm--connection 'xcb:KeyPress #'exwm-input--on-KeyPress)
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(xcb:+event exwm--connection 'xcb:xinput:KeyPress #'exwm-input--on-KeyPress)
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(xcb:+event exwm--connection 'xcb:xinput:KeyRelease
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#'exwm-input--on-KeyRelease)
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(xcb:+event exwm--connection 'xcb:xinput:Hierarchy
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#'exwm-input--on-Hierarchy)
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(xcb:+event exwm--connection 'xcb:ButtonPress #'exwm-input--on-ButtonPress)
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(xcb:+event exwm--connection 'xcb:ButtonRelease
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#'exwm-floating--stop-moveresize)
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