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exwm2/exwm-input.el
Chris Feng dd0a62c405 Add support for `mouse-autoselect-window' 
; This feature requires both `mouse-autoselect-window` and
; `focus-follows-mouse' being set.  Delaying autoselection is not
; supported yet.

* exwm-core.el (exwm--client-event-mask): Select the EnterNotify event
on each X window when `mouse-autoselect-window' is set.
* exwm-input.el (exwm-input--on-EnterNotify): New function for making
`mouse-autoselect-window' work on X windows.
(exwm-input--init): Listen to EnterNotify event when
`mouse-autoselect-window' is set.
2017-12-31 20:53:58 +08:00

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;;; exwm-input.el --- Input Module for EXWM -*- lexical-binding: t -*-
;; Copyright (C) 2015-2018 Free Software Foundation, Inc.
;; Author: Chris Feng <chris.w.feng@gmail.com>
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; This module deals with key/mouse matters, including:
;; + Input focus,
;; + Key/Button event handling,
;; + Key events filtering and simulation.
;; Todo:
;; + Pointer simulation mode (e.g. 'C-c 1'/'C-c 2' for single/double click,
;; move with arrow keys).
;; + Simulation keys to mimic Emacs key bindings for text edit (redo, select,
;; cancel, clear, etc). Some of them are not present on common keyboard
;; (keycode = 0). May need to use XKB extension.
;;; Code:
(require 'xcb-keysyms)
(require 'exwm-core)
(defvar exwm-input-move-event 's-down-mouse-1
"Emacs event to start moving a window.")
(defvar exwm-input-resize-event 's-down-mouse-3
"Emacs event to start resizing a window.")
(defvar exwm-input--timestamp-window nil)
(defvar exwm-input--timestamp-atom nil)
(defvar exwm-input--timestamp-callback nil)
(defvar exwm-workspace--current)
(defvar exwm-workspace--switch-history-outdated)
(defvar exwm-workspace-current-index)
(defvar exwm-workspace--minibuffer)
(defvar exwm-workspace--list)
(defvar exwm-input--global-keys nil "Global key bindings.")
(defvar exwm-input--global-prefix-keys nil
"List of prefix keys of global key bindings.")
(defvar exwm-input-prefix-keys
'(?\C-c ?\C-x ?\C-u ?\C-h ?\M-x ?\M-` ?\M-& ?\M-:)
"List of prefix keys EXWM should forward to Emacs when in line-mode.")
(defvar exwm-input--simulation-keys nil "Simulation keys in line-mode.")
(defvar exwm-input--simulation-prefix-keys nil
"List of prefix keys of simulation keys in line-mode.")
(defun exwm-input--set-focus (id)
"Set input focus to window ID in a proper way."
(when (exwm--id->buffer id)
(with-current-buffer (exwm--id->buffer id)
(cond
((and (not exwm--hints-input)
(memq xcb:Atom:WM_TAKE_FOCUS exwm--protocols))
(when (= (frame-parameter nil 'exwm-id)
(slot-value (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:GetInputFocus))
'focus))
(exwm--log "Focus on #x%x with WM_TAKE_FOCUS" id)
(exwm-input--update-timestamp
(lambda (timestamp id)
(let ((event (make-instance 'xcb:icccm:WM_TAKE_FOCUS
:window id
:time timestamp)))
(setq event (xcb:marshal event exwm--connection))
(xcb:+request exwm--connection
(make-instance 'xcb:icccm:SendEvent
:destination id
:event event))
(exwm-input--set-active-window id)
(xcb:flush exwm--connection)))
id)))
(t
(exwm--log "Focus on #x%x with SetInputFocus" id)
(xcb:+request exwm--connection
(make-instance 'xcb:SetInputFocus
:revert-to xcb:InputFocus:Parent
:focus id
:time xcb:Time:CurrentTime))
(exwm-input--set-active-window id)
(xcb:flush exwm--connection))))))
(defun exwm-input--update-timestamp (callback &rest args)
"Fetch the latest timestamp from the server and feed it to CALLBACK.
ARGS are additional arguments to CALLBACK."
(setq exwm-input--timestamp-callback (cons callback args))
(xcb:+request exwm--connection
(make-instance 'xcb:ChangeProperty
:mode xcb:PropMode:Replace
:window exwm-input--timestamp-window
:property exwm-input--timestamp-atom
:type xcb:Atom:CARDINAL
:format 32
:data-len 0
:data nil))
(xcb:flush exwm--connection))
(defun exwm-input--on-PropertyNotify (data _synthetic)
"Handle PropertyNotify events."
(when exwm-input--timestamp-callback
(let ((obj (make-instance 'xcb:PropertyNotify)))
(xcb:unmarshal obj data)
(when (= exwm-input--timestamp-window
(slot-value obj 'window))
(apply (car exwm-input--timestamp-callback)
(slot-value obj 'time)
(cdr exwm-input--timestamp-callback))
(setq exwm-input--timestamp-callback nil)))))
(defun exwm-input--on-FocusIn (data _synthetic)
"Handle FocusIn events."
(let ((obj (make-instance 'xcb:FocusIn)))
(xcb:unmarshal obj data)
(with-slots (mode) obj
;; Revert input focus back to Emacs frame / X window when it's set on
;; the root window or some workspace container.
(when (eq mode xcb:NotifyMode:Normal)
(x-focus-frame (selected-frame))
(select-window (selected-window))))))
(defun exwm-input--on-EnterNotify (data _synthetic)
"Handle EnterNotify events."
(let ((evt (make-instance 'xcb:EnterNotify))
buffer window frame frame-xid edges fake-evt)
(xcb:unmarshal evt data)
(with-slots (time root event root-x root-y event-x event-y state) evt
(setq buffer (exwm--id->buffer event)
window (get-buffer-window buffer t))
(when (and buffer window (not (eq window (selected-window))))
(setq frame (window-frame window)
frame-xid (frame-parameter frame 'exwm-id))
(unless (eq frame exwm-workspace--current)
(if (exwm-workspace--workspace-p frame)
;; The X window is on another workspace.
(exwm-workspace-switch frame)
(with-current-buffer buffer
(when (and (eq major-mode 'exwm-mode)
(not (eq exwm--frame exwm-workspace--current)))
;; The floating X window is on another workspace.
(exwm-workspace-switch exwm--frame)))))
;; Send a fake MotionNotify event to Emacs.
(setq edges (window-inside-pixel-edges window)
fake-evt (make-instance 'xcb:MotionNotify
:detail 0
:time time
:root root
:event frame-xid
:child xcb:Window:None
:root-x root-x
:root-y root-y
:event-x (+ event-x (elt edges 0))
:event-y (+ event-y (elt edges 1))
:state state
:same-screen 1))
(xcb:+request exwm--connection
(make-instance 'xcb:SendEvent
:propagate 0
:destination frame-xid
:event-mask xcb:EventMask:NoEvent
:event (xcb:marshal fake-evt exwm--connection)))
(xcb:flush exwm--connection)))))
(defun exwm-input--on-keysyms-update ()
(let ((exwm-input--global-prefix-keys nil))
(exwm-input--update-global-prefix-keys)))
(defun exwm-input--on-workspace-list-change ()
"Run in `exwm-input--update-global-prefix-keys'."
(dolist (f exwm-workspace--list)
;; Reuse the 'exwm-grabbed' frame parameter set in
;; `exwm-input--update-global-prefix-keys'.
(unless (frame-parameter f 'exwm-grabbed)
(xcb:+request exwm--connection
(make-instance 'xcb:ChangeWindowAttributes
:window (frame-parameter f 'exwm-workspace)
:value-mask xcb:CW:EventMask
:event-mask xcb:EventMask:FocusChange))))
(exwm-input--update-global-prefix-keys)
(xcb:flush exwm--connection))
(declare-function exwm-workspace--client-p "exwm-workspace.el"
(&optional frame))
(defvar exwm-input--update-focus-window nil "The (Emacs) window to be focused.
This value should always be overwritten.")
(defun exwm-input--on-buffer-list-update ()
"Run in `buffer-list-update-hook' to track input focus."
(when (and (not (eq this-command #'handle-switch-frame))
(not (exwm-workspace--client-p))
;; The following conditions filter out events relating to temp
;; buffers.
(eq (current-buffer) (window-buffer))
(not (string-prefix-p " *temp*"
(buffer-name (car (last (buffer-list)))))))
(redirect-frame-focus (selected-frame) nil)
(setq exwm-input--update-focus-window (selected-window))
(exwm-input--update-focus-defer)))
;; Input focus update requests should be accumulated for a short time
;; interval so that only the last one need to be processed. This not
;; improves the overall performance, but avoids the problem of input
;; focus loop, which is a result of the interaction with Emacs frames.
;;
;; FIXME: The time interval is hard to decide and perhaps machine-dependent.
;; A value too small can cause redundant updates of input focus,
;; and even worse, dead loops. OTOH a large value would bring
;; laggy experience.
(defconst exwm-input--update-focus-interval 0.01
"Time interval (in seconds) for accumulating input focus update requests.")
(defvar exwm-input--update-focus-lock nil
"Lock for solving input focus update contention.")
(defvar exwm-input--update-focus-defer-timer nil "Timer for polling the lock.")
(defvar exwm-input--update-focus-timer nil
"Timer for deferring the update of input focus.")
(defun exwm-input--update-focus-defer ()
"Defer updating input focus."
(when exwm-input--update-focus-defer-timer
(cancel-timer exwm-input--update-focus-defer-timer))
(if exwm-input--update-focus-lock
(setq exwm-input--update-focus-defer-timer
(exwm--defer 0 #'exwm-input--update-focus-defer))
(setq exwm-input--update-focus-defer-timer nil)
(when exwm-input--update-focus-timer
(cancel-timer exwm-input--update-focus-timer))
(setq exwm-input--update-focus-timer
;; Attempt to accumulate successive events close enough.
(run-with-timer exwm-input--update-focus-interval
nil
#'exwm-input--update-focus-commit
exwm-input--update-focus-window))))
(declare-function exwm-layout--iconic-state-p "exwm-layout.el" (&optional id))
(declare-function exwm-layout--set-state "exwm-layout.el" (id state))
(declare-function exwm-workspace--minibuffer-own-frame-p "exwm-workspace.el")
(declare-function exwm-workspace-switch "exwm-workspace.el"
(frame-or-index &optional force))
(declare-function exwm-workspace--workspace-p "exwm-workspace.el" (workspace))
(defun exwm-input--update-focus-commit (window)
"Commit updating input focus."
(setq exwm-input--update-focus-lock t)
(unwind-protect
(exwm-input--update-focus window)
(setq exwm-input--update-focus-lock nil)))
(defun exwm-input--update-focus (window)
"Update input focus."
(when (window-live-p window)
(with-current-buffer (window-buffer window)
(if (eq major-mode 'exwm-mode)
(if (not (eq exwm--frame exwm-workspace--current))
(progn
(set-frame-parameter exwm--frame 'exwm-selected-window window)
(exwm--defer 0 #'exwm-workspace-switch exwm--frame))
(exwm--log "Set focus on #x%x" exwm--id)
(exwm-input--set-focus exwm--id)
(when exwm--floating-frame
;; Adjust stacking orders of the floating container.
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window exwm--container
:value-mask xcb:ConfigWindow:StackMode
:stack-mode xcb:StackMode:Above))
;; This floating X window might be hide by `exwm-floating-hide'.
(when (exwm-layout--iconic-state-p)
(exwm-layout--set-state exwm--id
xcb:icccm:WM_STATE:NormalState))
(xcb:flush exwm--connection)))
(when (eq (selected-window) window)
(exwm--log "Focus on %s" window)
(if (and (exwm-workspace--workspace-p (selected-frame))
(not (eq (selected-frame) exwm-workspace--current)))
;; The focus is on another workspace (e.g. it got clicked)
;; so switch to it.
(progn
(set-frame-parameter (selected-frame) 'exwm-selected-window
window)
(exwm--defer 0 #'exwm-workspace-switch (selected-frame)))
;; The focus is still on the current workspace.
(if (not (and (exwm-workspace--minibuffer-own-frame-p)
(minibufferp)))
(x-focus-frame (window-frame window))
;; X input focus should be set on the previously selected
;; frame.
(x-focus-frame (window-frame (minibuffer-selected-window))))
(exwm-input--set-active-window)
(xcb:flush exwm--connection)))))))
(defun exwm-input--on-minibuffer-setup ()
"Run in `minibuffer-setup-hook' to set input focus."
(unless (exwm-workspace--client-p)
;; Set input focus on the Emacs frame
(x-focus-frame (window-frame (minibuffer-selected-window)))))
(defun exwm-input--set-active-window (&optional id)
"Set _NET_ACTIVE_WINDOW."
(xcb:+request exwm--connection
(make-instance 'xcb:ewmh:set-_NET_ACTIVE_WINDOW
:window exwm--root
:data (or id xcb:Window:None))))
(declare-function exwm-floating--start-moveresize "exwm-floating.el"
(id &optional type))
(declare-function exwm-workspace--position "exwm-workspace.el" (frame))
(defun exwm-input--on-ButtonPress (data _synthetic)
"Handle ButtonPress event."
(let ((obj (make-instance 'xcb:ButtonPress))
(mode xcb:Allow:SyncPointer)
button-event window buffer frame)
(xcb:unmarshal obj data)
(with-slots (detail time event state) obj
(setq button-event (xcb:keysyms:keysym->event exwm--connection
detail state)
window (get-buffer-window (exwm--id->buffer event) t)
buffer (window-buffer window))
(cond ((and (eq button-event exwm-input-move-event)
;; Either an undecorated or a floating X window.
(with-current-buffer buffer
(or (not (eq major-mode 'exwm-mode))
exwm--floating-frame)))
;; Move
(exwm-floating--start-moveresize
event xcb:ewmh:_NET_WM_MOVERESIZE_MOVE))
((and (eq button-event exwm-input-resize-event)
(with-current-buffer buffer
(or (not (eq major-mode 'exwm-mode))
exwm--floating-frame)))
;; Resize
(exwm-floating--start-moveresize event))
(t
;; Click to focus
(unless (eq window (selected-window))
(setq frame (window-frame window))
(unless (eq frame exwm-workspace--current)
(if (exwm-workspace--workspace-p frame)
;; The X window is on another workspace
(exwm-workspace-switch frame)
(with-current-buffer buffer
(when (and (eq major-mode 'exwm-mode)
(not (eq exwm--frame
exwm-workspace--current)))
;; The floating X window is on another workspace
(exwm-workspace-switch exwm--frame)))))
;; It has been reported that the `window' may have be deleted
(if (window-live-p window)
(select-window window)
(setq window
(get-buffer-window (exwm--id->buffer event) t))
(when window (select-window window))))
;; The event should be replayed
(setq mode xcb:Allow:ReplayPointer))))
(xcb:+request exwm--connection
(make-instance 'xcb:AllowEvents :mode mode :time xcb:Time:CurrentTime))
(xcb:flush exwm--connection)))
(defun exwm-input--on-KeyPress (data _synthetic)
"Handle KeyPress event."
(let ((obj (make-instance 'xcb:KeyPress)))
(xcb:unmarshal obj data)
(if (eq major-mode 'exwm-mode)
(funcall exwm--on-KeyPress obj data)
(exwm-input--on-KeyPress-char-mode obj))))
(defun exwm-input--update-global-prefix-keys ()
"Update `exwm-input--global-prefix-keys'."
(when exwm--connection
(let ((original exwm-input--global-prefix-keys)
keysym keycode ungrab-key grab-key workspace)
(setq exwm-input--global-prefix-keys nil)
(dolist (i exwm-input--global-keys)
(cl-pushnew (elt i 0) exwm-input--global-prefix-keys))
;; Stop here if the global prefix keys are update-to-date and
;; there's no new workspace.
(unless (and (equal original exwm-input--global-prefix-keys)
(cl-every (lambda (w) (frame-parameter w 'exwm-grabbed))
exwm-workspace--list))
(setq ungrab-key (make-instance 'xcb:UngrabKey
:key xcb:Grab:Any :grab-window nil
:modifiers xcb:ModMask:Any)
grab-key (make-instance 'xcb:GrabKey
:owner-events 0
:grab-window nil
:modifiers nil
:key nil
:pointer-mode xcb:GrabMode:Async
:keyboard-mode xcb:GrabMode:Async))
(dolist (w exwm-workspace--list)
(setq workspace (frame-parameter w 'exwm-workspace))
(setf (slot-value ungrab-key 'grab-window) workspace)
(if (xcb:+request-checked+request-check exwm--connection ungrab-key)
(exwm--log "Failed to ungrab keys")
;; Label this frame.
(set-frame-parameter w 'exwm-grabbed t)
(dolist (k exwm-input--global-prefix-keys)
(setq keysym (xcb:keysyms:event->keysym exwm--connection k)
keycode (xcb:keysyms:keysym->keycode exwm--connection
(car keysym)))
(setf (slot-value grab-key 'grab-window) workspace
(slot-value grab-key 'modifiers) (cdr keysym)
(slot-value grab-key 'key) keycode)
(when (or (= 0 keycode)
(xcb:+request-checked+request-check exwm--connection
grab-key)
;; Also grab this key with num-lock mask set.
(when (/= 0 xcb:keysyms:num-lock-mask)
(setf (slot-value grab-key 'modifiers)
(logior (cdr keysym)
xcb:keysyms:num-lock-mask))
(xcb:+request-checked+request-check exwm--connection
grab-key)))
(user-error "[EXWM] Failed to grab key: %s"
(single-key-description k))))))))))
(defun exwm-input-set-key (key command)
"Set a global key binding."
(interactive "KSet key globally: \nCSet key %s to command: ")
(global-set-key key command)
(cl-pushnew key exwm-input--global-keys)
(when (called-interactively-p 'any)
(exwm-input--update-global-prefix-keys)))
;; Putting (t . EVENT) into `unread-command-events' does not really work
;; as documented for Emacs < 27.
(eval-and-compile
(if (< emacs-major-version 27)
(defsubst exwm-input--unread-event (event)
(setq unread-command-events
(append unread-command-events (list event))))
(defsubst exwm-input--unread-event (event)
(setq unread-command-events
(append unread-command-events `((t . ,event)))))))
(defvar exwm-input-command-whitelist nil
"A list of commands that when active all keys should be forwarded to Emacs.")
(make-obsolete-variable 'exwm-input-command-whitelist
"This variable can be safely removed." "25.1")
(defvar exwm-input--during-command nil
"Indicate whether between `pre-command-hook' and `post-command-hook'.")
(defvar exwm-input-line-mode-passthrough nil
"Non-nil makes 'line-mode' forwards all events to Emacs.")
(defvar exwm-input--line-mode-cache nil "Cache for incomplete key sequence.")
(defvar exwm-input--temp-line-mode nil
"Non-nil indicates it's in temporary line-mode for char-mode.")
(defun exwm-input--cache-event (event)
"Cache EVENT."
(setq exwm-input--line-mode-cache
(vconcat exwm-input--line-mode-cache (vector event)))
;; When the key sequence is complete.
(unless (keymapp (key-binding exwm-input--line-mode-cache))
(setq exwm-input--line-mode-cache nil)
(when exwm-input--temp-line-mode
(setq exwm-input--temp-line-mode nil)
(exwm-input--release-keyboard)))
(exwm-input--unread-event event))
(defun exwm-input--on-KeyPress-line-mode (key-press raw-data)
"Parse X KeyPress event to Emacs key event and then feed the command loop."
(with-slots (detail state) key-press
(let ((keysym (xcb:keysyms:keycode->keysym exwm--connection detail state))
event mode)
(when (and (/= 0 (car keysym))
(setq event (xcb:keysyms:keysym->event
exwm--connection (car keysym)
(logand state (lognot (cdr keysym)))))
(or exwm-input-line-mode-passthrough
exwm-input--during-command
;; Forward the event when there is an incomplete key
;; sequence or when the minibuffer is active.
exwm-input--line-mode-cache
(eq (active-minibuffer-window) (selected-window))
;;
(memq event exwm-input--global-prefix-keys)
(memq event exwm-input-prefix-keys)
(memq event exwm-input--simulation-prefix-keys)))
(setq mode xcb:Allow:AsyncKeyboard)
(exwm-input--cache-event event))
(unless mode
(if (= 0 (logand #x6000 state)) ;Check the 13~14 bits.
;; Not an XKB state; just replay it.
(setq mode xcb:Allow:ReplayKeyboard)
;; An XKB state; sent it with SendEvent.
;; FIXME: Can this also be replayed?
;; FIXME: KeyRelease events are lost.
(setq mode xcb:Allow:AsyncKeyboard)
(xcb:+request exwm--connection
(make-instance 'xcb:SendEvent
:propagate 0
:destination (slot-value key-press 'event)
:event-mask xcb:EventMask:NoEvent
:event raw-data)))
;; Make Emacs aware of this event when defining keyboard macros.
(when (and defining-kbd-macro event)
(set-transient-map '(keymap (t . (lambda () (interactive)))))
(exwm-input--unread-event event)))
(xcb:+request exwm--connection
(make-instance 'xcb:AllowEvents
:mode mode
:time xcb:Time:CurrentTime))
(xcb:flush exwm--connection))))
(defun exwm-input--on-KeyPress-char-mode (key-press &optional _raw-data)
"Handle KeyPress event in char-mode."
(with-slots (detail state) key-press
(let ((keysym (xcb:keysyms:keycode->keysym exwm--connection detail state))
event)
(when (and (/= 0 (car keysym))
(setq event (xcb:keysyms:keysym->event
exwm--connection (car keysym)
(logand state (lognot (cdr keysym))))))
(if (not (eq major-mode 'exwm-mode))
(exwm-input--unread-event event)
;; Grab keyboard temporarily.
(setq exwm-input--temp-line-mode t)
(exwm-input--grab-keyboard)
(exwm-input--cache-event event)))))
(xcb:+request exwm--connection
(make-instance 'xcb:AllowEvents
:mode xcb:Allow:AsyncKeyboard
:time xcb:Time:CurrentTime))
(xcb:flush exwm--connection))
(defun exwm-input--update-mode-line (id)
"Update the propertized `mode-line-process' for window ID."
(let (help-echo cmd mode)
(cl-case exwm--on-KeyPress
((exwm-input--on-KeyPress-line-mode)
(setq mode "line"
help-echo "mouse-1: Switch to char-mode"
cmd `(lambda ()
(interactive)
(exwm-input-release-keyboard ,id))))
((exwm-input--on-KeyPress-char-mode)
(setq mode "char"
help-echo "mouse-1: Switch to line-mode"
cmd `(lambda ()
(interactive)
(exwm-input-grab-keyboard ,id)))))
(with-current-buffer (exwm--id->buffer id)
(setq mode-line-process
`(": "
(:propertize ,mode
help-echo ,help-echo
mouse-face mode-line-highlight
local-map
(keymap
(mode-line
keymap
(down-mouse-1 . ,cmd)))))))))
(defun exwm-input--grab-keyboard (&optional id)
"Grab all key events on window ID."
(unless id (setq id (exwm--buffer->id (window-buffer))))
(when id
(when (xcb:+request-checked+request-check exwm--connection
(make-instance 'xcb:GrabKey
:owner-events 0
:grab-window id
:modifiers xcb:ModMask:Any
:key xcb:Grab:Any
:pointer-mode xcb:GrabMode:Async
:keyboard-mode xcb:GrabMode:Sync))
(exwm--log "Failed to grab keyboard for #x%x" id))
(with-current-buffer (exwm--id->buffer id)
(setq exwm--on-KeyPress #'exwm-input--on-KeyPress-line-mode))))
(defun exwm-input--release-keyboard (&optional id)
"Ungrab all key events on window ID."
(unless id (setq id (exwm--buffer->id (window-buffer))))
(when id
(when (xcb:+request-checked+request-check exwm--connection
(make-instance 'xcb:UngrabKey
:key xcb:Grab:Any
:grab-window id
:modifiers xcb:ModMask:Any))
(exwm--log "Failed to release keyboard for #x%x" id))
(with-current-buffer (exwm--id->buffer id)
(setq exwm--on-KeyPress #'exwm-input--on-KeyPress-char-mode))))
;;;###autoload
(defun exwm-input-grab-keyboard (&optional id)
"Switch to line-mode."
(interactive (list (exwm--buffer->id (window-buffer))))
(when id
(with-current-buffer (exwm--id->buffer id)
(exwm-input--grab-keyboard id)
(setq exwm--keyboard-grabbed t)
(exwm-input--update-mode-line id)
(force-mode-line-update))))
;;;###autoload
(defun exwm-input-release-keyboard (&optional id)
"Switch to char-mode."
(interactive (list (exwm--buffer->id (window-buffer))))
(when id
(with-current-buffer (exwm--id->buffer id)
(exwm-input--release-keyboard id)
(setq exwm--keyboard-grabbed nil)
(exwm-input--update-mode-line id)
(force-mode-line-update))))
;;;###autoload
(defun exwm-input-toggle-keyboard (&optional id)
"Toggle between 'line-mode' and 'char-mode'."
(interactive (list (exwm--buffer->id (window-buffer))))
(when id
(with-current-buffer (exwm--id->buffer id)
(if exwm--keyboard-grabbed
(exwm-input-release-keyboard id)
(exwm-reset)))))
(defun exwm-input--fake-key (event)
"Fake a key event equivalent to Emacs event EVENT."
(let* ((keysym (xcb:keysyms:event->keysym exwm--connection event))
keycode id)
(when (= 0 (car keysym))
(user-error "[EXWM] Invalid key: %s" (single-key-description event)))
(setq keycode (xcb:keysyms:keysym->keycode exwm--connection
(car keysym)))
(when (/= 0 keycode)
(setq id (exwm--buffer->id (window-buffer (selected-window))))
(dolist (class '(xcb:KeyPress xcb:KeyRelease))
(xcb:+request exwm--connection
(make-instance 'xcb:SendEvent
:propagate 0 :destination id
:event-mask xcb:EventMask:NoEvent
:event (xcb:marshal
(make-instance class
:detail keycode
:time xcb:Time:CurrentTime
:root exwm--root :event id
:child 0
:root-x 0 :root-y 0
:event-x 0 :event-y 0
:state (cdr keysym)
:same-screen 1)
exwm--connection)))))
(xcb:flush exwm--connection)))
;;;###autoload
(defun exwm-input-send-next-key (times)
"Send next key to client window."
(interactive "p")
(when (> times 12) (setq times 12))
(let (key keys)
(dotimes (i times)
;; Skip events not from keyboard
(let ((exwm-input-line-mode-passthrough t))
(catch 'break
(while t
(setq key (read-key (format "Send key: %s (%d/%d)"
(key-description keys)
(1+ i) times)))
(unless (listp key) (throw 'break nil)))))
(setq keys (vconcat keys (vector key)))
(exwm-input--fake-key key))))
;; (defun exwm-input-send-last-key ()
;; (interactive)
;; (unless (listp last-input-event) ;not a key event
;; (exwm-input--fake-key last-input-event)))
(defvar exwm-input--local-simulation-keys nil
"Whether simulation keys are local.")
(defun exwm-input--update-simulation-prefix-keys ()
"Update the list of prefix keys of simulation keys."
(setq exwm-input--simulation-prefix-keys nil)
(dolist (i exwm-input--simulation-keys)
(if exwm-input--local-simulation-keys
(local-set-key (car i) #'exwm-input-send-simulation-key)
(define-key exwm-mode-map (car i) #'exwm-input-send-simulation-key))
(cl-pushnew (elt (car i) 0) exwm-input--simulation-prefix-keys)))
(defun exwm-input-set-simulation-keys (simulation-keys)
"Set simulation keys.
SIMULATION-KEYS is an alist of the form (original-key . simulated-key)."
(setq exwm-input--simulation-keys nil)
(dolist (i simulation-keys)
(cl-pushnew `(,(vconcat (car i)) . ,(cdr i)) exwm-input--simulation-keys))
(exwm-input--update-simulation-prefix-keys))
(defun exwm-input-set-local-simulation-keys (simulation-keys)
"Set buffer-local simulation keys.
Its usage is the same with `exwm-input-set-simulation-keys'."
(make-local-variable 'exwm-input--simulation-keys)
(make-local-variable 'exwm-input--simulation-prefix-keys)
(use-local-map (copy-keymap exwm-mode-map))
(let ((exwm-input--local-simulation-keys t))
(exwm-input-set-simulation-keys simulation-keys)))
;;;###autoload
(defun exwm-input-send-simulation-key (times)
"Fake a key event according to last input key sequence."
(interactive "p")
(let ((pair (assoc (this-single-command-keys) exwm-input--simulation-keys)))
(when pair
(setq pair (cdr pair))
(unless (listp pair)
(setq pair (list pair)))
(dotimes (_ times)
(dolist (j pair)
(exwm-input--fake-key j))))))
(defun exwm-input--on-pre-command ()
"Run in `pre-command-hook'."
(setq exwm-input--during-command t))
(defun exwm-input--on-post-command ()
"Run in `post-command-hook'."
(setq exwm-input--during-command nil))
(declare-function exwm-floating--stop-moveresize "exwm-floating.el"
(&rest _args))
(declare-function exwm-floating--do-moveresize "exwm-floating.el"
(data _synthetic))
(defun exwm-input--init ()
"Initialize the keyboard module."
;; Refresh keyboard mapping
(xcb:keysyms:init exwm--connection #'exwm-input--on-keysyms-update)
;; Create the X window and intern the atom used to fetch timestamp.
(setq exwm-input--timestamp-window (xcb:generate-id exwm--connection))
(xcb:+request exwm--connection
(make-instance 'xcb:CreateWindow
:depth 0
:wid exwm-input--timestamp-window
:parent exwm--root
:x -1
:y -1
:width 1
:height 1
:border-width 0
:class xcb:WindowClass:CopyFromParent
:visual 0
:value-mask xcb:CW:EventMask
:event-mask xcb:EventMask:PropertyChange))
(let ((atom "_TIME"))
(setq exwm-input--timestamp-atom
(slot-value (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:InternAtom
:only-if-exists 0
:name-len (length atom)
:name atom))
'atom)))
;; Attach event listeners
(xcb:+event exwm--connection 'xcb:PropertyNotify
#'exwm-input--on-PropertyNotify)
(xcb:+event exwm--connection 'xcb:KeyPress #'exwm-input--on-KeyPress)
(xcb:+event exwm--connection 'xcb:ButtonPress #'exwm-input--on-ButtonPress)
(xcb:+event exwm--connection 'xcb:ButtonRelease
#'exwm-floating--stop-moveresize)
(xcb:+event exwm--connection 'xcb:MotionNotify
#'exwm-floating--do-moveresize)
(xcb:+event exwm--connection 'xcb:FocusIn #'exwm-input--on-FocusIn)
(when mouse-autoselect-window
(xcb:+event exwm--connection 'xcb:EnterNotify
#'exwm-input--on-EnterNotify))
;; The input focus should be set on the frame when minibuffer is active.
(add-hook 'minibuffer-setup-hook #'exwm-input--on-minibuffer-setup)
;; Control `exwm-input--during-command'
(add-hook 'pre-command-hook #'exwm-input--on-pre-command)
(add-hook 'post-command-hook #'exwm-input--on-post-command)
;; Update focus when buffer list updates
(add-hook 'buffer-list-update-hook #'exwm-input--on-buffer-list-update)
;; Re-grab global keys.
(add-hook 'exwm-workspace-list-change-hook
#'exwm-input--on-workspace-list-change)
(exwm-input--on-workspace-list-change)
;; Prevent frame parameters introduced by this module from being
;; saved/restored.
(dolist (i '(exwm-grabbed))
(push (cons i :never) frameset-filter-alist)))
(defun exwm-input--exit ()
"Exit the input module."
(remove-hook 'pre-command-hook #'exwm-input--on-pre-command)
(remove-hook 'post-command-hook #'exwm-input--on-post-command)
(remove-hook 'buffer-list-update-hook #'exwm-input--on-buffer-list-update)
(remove-hook 'exwm-workspace-list-change-hook
#'exwm-input--on-workspace-list-change)
(when exwm-input--update-focus-defer-timer
(cancel-timer exwm-input--update-focus-defer-timer))
(when exwm-input--update-focus-timer
(cancel-timer exwm-input--update-focus-timer)))
(provide 'exwm-input)
;;; exwm-input.el ends here
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