/
exwm.el
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exwm.el
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;;; exwm.el --- Emacs X Window Manager -*- lexical-binding: t -*-
;; Copyright (C) 2015-2021 Free Software Foundation, Inc.
;; Author: Chris Feng <chris.w.feng@gmail.com>
;; Maintainer: Adrián Medraño Calvo <adrian@medranocalvo.com>
;; Version: 0.26
;; Package-Requires: ((xelb "0.18"))
;; Keywords: unix
;; URL: https://github.com/ch11ng/exwm
;; 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:
;; Overview
;; --------
;; EXWM (Emacs X Window Manager) is a full-featured tiling X window manager
;; for Emacs built on top of [XELB](https://github.com/ch11ng/xelb).
;; It features:
;; + Fully keyboard-driven operations
;; + Hybrid layout modes (tiling & stacking)
;; + Dynamic workspace support
;; + ICCCM/EWMH compliance
;; + (Optional) RandR (multi-monitor) support
;; + (Optional) Built-in system tray
;; Installation & configuration
;; ----------------------------
;; Here are the minimal steps to get EXWM working:
;; 1. Install XELB and EXWM, and make sure they are in `load-path'.
;; 2. In '~/.emacs', add following lines (please modify accordingly):
;;
;; (require 'exwm)
;; (require 'exwm-config)
;; (exwm-config-example)
;;
;; 3. Link or copy the file 'xinitrc' to '~/.xinitrc'.
;; 4. Launch EXWM in a console (e.g. tty1) with
;;
;; xinit -- vt01
;;
;; You should additionally hide the menu-bar, tool-bar, etc to increase the
;; usable space. Please check the wiki (https://github.com/ch11ng/exwm/wiki)
;; for more detailed instructions on installation, configuration, usage, etc.
;; References:
;; + dwm (http://dwm.suckless.org/)
;; + i3 wm (https://i3wm.org/)
;; + Also see references within each required library.
;;; Code:
(require 'server)
(require 'exwm-core)
(require 'exwm-workspace)
(require 'exwm-layout)
(require 'exwm-floating)
(require 'exwm-manage)
(require 'exwm-input)
(defgroup exwm nil
"Emacs X Window Manager."
:tag "EXWM"
:version "25.3"
:group 'applications
:prefix "exwm-")
(defcustom exwm-init-hook nil
"Normal hook run when EXWM has just finished initialization."
:type 'hook)
(defcustom exwm-exit-hook nil
"Normal hook run just before EXWM exits."
:type 'hook)
(defcustom exwm-update-class-hook nil
"Normal hook run when window class is updated."
:type 'hook)
(defcustom exwm-update-title-hook nil
"Normal hook run when window title is updated."
:type 'hook)
(defcustom exwm-blocking-subrs '(x-file-dialog x-popup-dialog x-select-font)
"Subrs (primitives) that would normally block EXWM."
:type '(repeat function))
(defcustom exwm-replace 'ask
"Whether to replace existing window manager."
:type '(radio (const :tag "Ask" ask)
(const :tag "Replace by default" t)
(const :tag "Do not replace" nil)))
(defconst exwm--server-name "server-exwm"
"Name of the subordinate Emacs server.")
(defvar exwm--server-process nil "Process of the subordinate Emacs server.")
(defun exwm-reset ()
"Reset the state of the selected window (non-fullscreen, line-mode, etc)."
(interactive)
(exwm--log)
(with-current-buffer (window-buffer)
(when (derived-mode-p 'exwm-mode)
(when (exwm-layout--fullscreen-p)
(exwm-layout-unset-fullscreen))
;; Force refresh
(exwm-layout--refresh)
(call-interactively #'exwm-input-grab-keyboard))))
;;;###autoload
(defun exwm-restart ()
"Restart EXWM."
(interactive)
(exwm--log)
(when (exwm--confirm-kill-emacs "[EXWM] Restart? " 'no-check)
(let* ((attr (process-attributes (emacs-pid)))
(args (cdr (assq 'args attr)))
(ppid (cdr (assq 'ppid attr)))
(pargs (cdr (assq 'args (process-attributes ppid)))))
(cond
((= ppid 1)
;; The parent is the init process. This probably means this
;; instance is an emacsclient. Anyway, start a control instance
;; to manage the subsequent ones.
(call-process (car command-line-args))
(kill-emacs))
((string= args pargs)
;; This is a subordinate instance. Return a magic number to
;; inform the parent (control instance) to start another one.
(kill-emacs ?R))
(t
;; This is the control instance. Keep starting subordinate
;; instances until told to exit.
;; Run `server-force-stop' if it exists.
(run-hooks 'kill-emacs-hook)
(with-temp-buffer
(while (= ?R (shell-command-on-region (point) (point) args))))
(kill-emacs))))))
(defun exwm--update-desktop (xwin)
"Update _NET_WM_DESKTOP."
(exwm--log "#x%x" xwin)
(with-current-buffer (exwm--id->buffer xwin)
(let ((reply (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:ewmh:get-_NET_WM_DESKTOP
:window xwin)))
desktop)
(when reply
(setq desktop (slot-value reply 'value))
(cond
((eq desktop 4294967295.)
(unless (or (not exwm--floating-frame)
(eq exwm--frame exwm-workspace--current)
(and exwm--desktop
(= desktop exwm--desktop)))
(exwm-layout--show xwin (frame-root-window exwm--floating-frame)))
(setq exwm--desktop desktop))
((and desktop
(< desktop (exwm-workspace--count))
(if exwm--desktop
(/= desktop exwm--desktop)
(/= desktop (exwm-workspace--position exwm--frame))))
(exwm-workspace-move-window desktop xwin))
(t
(exwm-workspace--set-desktop xwin)))))))
(defun exwm--update-window-type (id &optional force)
"Update _NET_WM_WINDOW_TYPE."
(exwm--log "#x%x" id)
(with-current-buffer (exwm--id->buffer id)
(unless (and exwm-window-type (not force))
(let ((reply (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:ewmh:get-_NET_WM_WINDOW_TYPE
:window id))))
(when reply ;nil when destroyed
(setq exwm-window-type (append (slot-value reply 'value) nil)))))))
(defun exwm--update-class (id &optional force)
"Update WM_CLASS."
(exwm--log "#x%x" id)
(with-current-buffer (exwm--id->buffer id)
(unless (and exwm-instance-name exwm-class-name (not force))
(let ((reply (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:icccm:get-WM_CLASS :window id))))
(when reply ;nil when destroyed
(setq exwm-instance-name (slot-value reply 'instance-name)
exwm-class-name (slot-value reply 'class-name))
(when (and exwm-instance-name exwm-class-name)
(run-hooks 'exwm-update-class-hook)))))))
(defun exwm--update-utf8-title (id &optional force)
"Update _NET_WM_NAME."
(exwm--log "#x%x" id)
(with-current-buffer (exwm--id->buffer id)
(when (or force (not exwm-title))
(let ((reply (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:ewmh:get-_NET_WM_NAME :window id))))
(when reply ;nil when destroyed
(setq exwm-title (slot-value reply 'value))
(when exwm-title
(setq exwm--title-is-utf8 t)
(run-hooks 'exwm-update-title-hook)))))))
(defun exwm--update-ctext-title (id &optional force)
"Update WM_NAME."
(exwm--log "#x%x" id)
(with-current-buffer (exwm--id->buffer id)
(unless (or exwm--title-is-utf8
(and exwm-title (not force)))
(let ((reply (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:icccm:get-WM_NAME :window id))))
(when reply ;nil when destroyed
(setq exwm-title (slot-value reply 'value))
(when exwm-title
(run-hooks 'exwm-update-title-hook)))))))
(defun exwm--update-title (id)
"Update _NET_WM_NAME or WM_NAME."
(exwm--log "#x%x" id)
(exwm--update-utf8-title id)
(exwm--update-ctext-title id))
(defun exwm--update-transient-for (id &optional force)
"Update WM_TRANSIENT_FOR."
(exwm--log "#x%x" id)
(with-current-buffer (exwm--id->buffer id)
(unless (and exwm-transient-for (not force))
(let ((reply (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:icccm:get-WM_TRANSIENT_FOR
:window id))))
(when reply ;nil when destroyed
(setq exwm-transient-for (slot-value reply 'value)))))))
(defun exwm--update-normal-hints (id &optional force)
"Update WM_NORMAL_HINTS."
(exwm--log "#x%x" id)
(with-current-buffer (exwm--id->buffer id)
(unless (and (not force)
(or exwm--normal-hints-x exwm--normal-hints-y
exwm--normal-hints-width exwm--normal-hints-height
exwm--normal-hints-min-width exwm--normal-hints-min-height
exwm--normal-hints-max-width exwm--normal-hints-max-height
;; FIXME: other fields
))
(let ((reply (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:icccm:get-WM_NORMAL_HINTS
:window id))))
(when (and reply (slot-value reply 'flags)) ;nil when destroyed
(with-slots (flags x y width height min-width min-height max-width
max-height base-width base-height ;; win-gravity
)
reply
(unless (= 0 (logand flags xcb:icccm:WM_SIZE_HINTS:USPosition))
(setq exwm--normal-hints-x x exwm--normal-hints-y y))
(unless (= 0 (logand flags xcb:icccm:WM_SIZE_HINTS:USSize))
(setq exwm--normal-hints-width width
exwm--normal-hints-height height))
(unless (= 0 (logand flags xcb:icccm:WM_SIZE_HINTS:PMinSize))
(setq exwm--normal-hints-min-width min-width
exwm--normal-hints-min-height min-height))
(unless (= 0 (logand flags xcb:icccm:WM_SIZE_HINTS:PMaxSize))
(setq exwm--normal-hints-max-width max-width
exwm--normal-hints-max-height max-height))
(unless (or exwm--normal-hints-min-width
(= 0 (logand flags xcb:icccm:WM_SIZE_HINTS:PBaseSize)))
(setq exwm--normal-hints-min-width base-width
exwm--normal-hints-min-height base-height))
;; (unless (= 0 (logand flags xcb:icccm:WM_SIZE_HINTS:PWinGravity))
;; (setq exwm--normal-hints-win-gravity win-gravity))
(setq exwm--fixed-size
(and exwm--normal-hints-min-width
exwm--normal-hints-min-height
exwm--normal-hints-max-width
exwm--normal-hints-max-height
(/= 0 exwm--normal-hints-min-width)
(/= 0 exwm--normal-hints-min-height)
(= exwm--normal-hints-min-width
exwm--normal-hints-max-width)
(= exwm--normal-hints-min-height
exwm--normal-hints-max-height)))))))))
(defun exwm--update-hints (id &optional force)
"Update WM_HINTS."
(exwm--log "#x%x" id)
(with-current-buffer (exwm--id->buffer id)
(unless (and (not force) exwm--hints-input exwm--hints-urgency)
(let ((reply (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:icccm:get-WM_HINTS :window id))))
(when (and reply (slot-value reply 'flags)) ;nil when destroyed
(with-slots (flags input initial-state) reply
(when flags
(unless (= 0 (logand flags xcb:icccm:WM_HINTS:InputHint))
(setq exwm--hints-input (when input (= 1 input))))
(unless (= 0 (logand flags xcb:icccm:WM_HINTS:StateHint))
(setq exwm-state initial-state))
(unless (= 0 (logand flags xcb:icccm:WM_HINTS:UrgencyHint))
(setq exwm--hints-urgency t))))
(when (and exwm--hints-urgency
(not (eq exwm--frame exwm-workspace--current)))
(unless (frame-parameter exwm--frame 'exwm-urgency)
(set-frame-parameter exwm--frame 'exwm-urgency t)
(setq exwm-workspace--switch-history-outdated t))))))))
(defun exwm--update-protocols (id &optional force)
"Update WM_PROTOCOLS."
(exwm--log "#x%x" id)
(with-current-buffer (exwm--id->buffer id)
(unless (and exwm--protocols (not force))
(let ((reply (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:icccm:get-WM_PROTOCOLS
:window id))))
(when reply ;nil when destroyed
(setq exwm--protocols (append (slot-value reply 'value) nil)))))))
(defun exwm--update-struts-legacy (id)
"Update _NET_WM_STRUT."
(exwm--log "#x%x" id)
(let ((pair (assq id exwm-workspace--id-struts-alist))
reply struts)
(unless (and pair (< 4 (length (cdr pair))))
(setq reply (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:ewmh:get-_NET_WM_STRUT
:window id)))
(when reply
(setq struts (slot-value reply 'value))
(if pair
(setcdr pair struts)
(push (cons id struts) exwm-workspace--id-struts-alist))
(exwm-workspace--update-struts))
;; Update workareas.
(exwm-workspace--update-workareas)
;; Update workspaces.
(dolist (f exwm-workspace--list)
(exwm-workspace--set-fullscreen f)))))
(defun exwm--update-struts-partial (id)
"Update _NET_WM_STRUT_PARTIAL."
(exwm--log "#x%x" id)
(let ((reply (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:ewmh:get-_NET_WM_STRUT_PARTIAL
:window id)))
struts pair)
(when reply
(setq struts (slot-value reply 'value)
pair (assq id exwm-workspace--id-struts-alist))
(if pair
(setcdr pair struts)
(push (cons id struts) exwm-workspace--id-struts-alist))
(exwm-workspace--update-struts))
;; Update workareas.
(exwm-workspace--update-workareas)
;; Update workspaces.
(dolist (f exwm-workspace--list)
(exwm-workspace--set-fullscreen f))))
(defun exwm--update-struts (id)
"Update _NET_WM_STRUT_PARTIAL or _NET_WM_STRUT."
(exwm--log "#x%x" id)
(exwm--update-struts-partial id)
(exwm--update-struts-legacy id))
(defun exwm--on-PropertyNotify (data _synthetic)
"Handle PropertyNotify event."
(let ((obj (make-instance 'xcb:PropertyNotify))
atom id buffer)
(xcb:unmarshal obj data)
(setq id (slot-value obj 'window)
atom (slot-value obj 'atom))
(exwm--log "atom=%s(%s)" (x-get-atom-name atom exwm-workspace--current) atom)
(setq buffer (exwm--id->buffer id))
(if (not (buffer-live-p buffer))
;; Properties of unmanaged X windows.
(cond ((= atom xcb:Atom:_NET_WM_STRUT)
(exwm--update-struts-legacy id))
((= atom xcb:Atom:_NET_WM_STRUT_PARTIAL)
(exwm--update-struts-partial id)))
(with-current-buffer buffer
(cond ((= atom xcb:Atom:_NET_WM_WINDOW_TYPE)
(exwm--update-window-type id t))
((= atom xcb:Atom:WM_CLASS)
(exwm--update-class id t))
((= atom xcb:Atom:_NET_WM_NAME)
(exwm--update-utf8-title id t))
((= atom xcb:Atom:WM_NAME)
(exwm--update-ctext-title id t))
((= atom xcb:Atom:WM_TRANSIENT_FOR)
(exwm--update-transient-for id t))
((= atom xcb:Atom:WM_NORMAL_HINTS)
(exwm--update-normal-hints id t))
((= atom xcb:Atom:WM_HINTS)
(exwm--update-hints id t))
((= atom xcb:Atom:WM_PROTOCOLS)
(exwm--update-protocols id t))
((= atom xcb:Atom:_NET_WM_USER_TIME)) ;ignored
(t
(exwm--log "Unhandled: %s(%d)"
(x-get-atom-name atom exwm-workspace--current)
atom)))))))
(defun exwm--on-ClientMessage (raw-data _synthetic)
"Handle ClientMessage event."
(let ((obj (make-instance 'xcb:ClientMessage))
type id data)
(xcb:unmarshal obj raw-data)
(setq type (slot-value obj 'type)
id (slot-value obj 'window)
data (slot-value (slot-value obj 'data) 'data32))
(exwm--log "atom=%s(%s)" (x-get-atom-name type exwm-workspace--current)
type)
(cond
;; _NET_NUMBER_OF_DESKTOPS.
((= type xcb:Atom:_NET_NUMBER_OF_DESKTOPS)
(let ((current (exwm-workspace--count))
(requested (elt data 0)))
;; Only allow increasing/decreasing the workspace number by 1.
(cond
((< current requested)
(make-frame))
((and (> current requested)
(> current 1))
(let ((frame (car (last exwm-workspace--list))))
(exwm-workspace--get-remove-frame-next-workspace frame)
(delete-frame frame))))))
;; _NET_CURRENT_DESKTOP.
((= type xcb:Atom:_NET_CURRENT_DESKTOP)
(exwm-workspace-switch (elt data 0)))
;; _NET_ACTIVE_WINDOW.
((= type xcb:Atom:_NET_ACTIVE_WINDOW)
(let ((buffer (exwm--id->buffer id))
iconic window)
(when (buffer-live-p buffer)
(with-current-buffer buffer
(when (eq exwm--frame exwm-workspace--current)
(if exwm--floating-frame
(select-frame exwm--floating-frame)
(setq iconic (exwm-layout--iconic-state-p))
(when iconic
;; State change: iconic => normal.
(set-window-buffer (frame-selected-window exwm--frame)
(current-buffer)))
;; Focus transfer.
(setq window (get-buffer-window nil t))
(when (or iconic
(not (eq window (selected-window))))
(select-window window))))))))
;; _NET_CLOSE_WINDOW.
((= type xcb:Atom:_NET_CLOSE_WINDOW)
(let ((buffer (exwm--id->buffer id)))
(when (buffer-live-p buffer)
(exwm--defer 0 #'kill-buffer buffer))))
;; _NET_WM_MOVERESIZE
((= type xcb:Atom:_NET_WM_MOVERESIZE)
(let ((direction (elt data 2))
(buffer (exwm--id->buffer id)))
(unless (and buffer
(not (buffer-local-value 'exwm--floating-frame buffer)))
(cond ((= direction
xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_KEYBOARD)
;; FIXME
)
((= direction
xcb:ewmh:_NET_WM_MOVERESIZE_MOVE_KEYBOARD)
;; FIXME
)
((= direction xcb:ewmh:_NET_WM_MOVERESIZE_CANCEL)
(exwm-floating--stop-moveresize))
;; In case it's a workspace frame.
((and (not buffer)
(catch 'break
(dolist (f exwm-workspace--list)
(when (or (eq id (frame-parameter f 'exwm-outer-id))
(eq id (frame-parameter f 'exwm-id)))
(throw 'break t)))
nil)))
(t
;; In case it's a floating frame,
;; move the corresponding X window instead.
(unless buffer
(catch 'break
(dolist (pair exwm--id-buffer-alist)
(with-current-buffer (cdr pair)
(when
(and exwm--floating-frame
(or (eq id
(frame-parameter exwm--floating-frame
'exwm-outer-id))
(eq id
(frame-parameter exwm--floating-frame
'exwm-id))))
(setq id exwm--id)
(throw 'break nil))))))
;; Start to move it.
(exwm-floating--start-moveresize id direction))))))
;; _NET_REQUEST_FRAME_EXTENTS
((= type xcb:Atom:_NET_REQUEST_FRAME_EXTENTS)
(let ((buffer (exwm--id->buffer id))
top btm)
(if (or (not buffer)
(not (buffer-local-value 'exwm--floating-frame buffer)))
(setq top 0
btm 0)
(setq top (window-header-line-height)
btm (window-mode-line-height)))
(xcb:+request exwm--connection
(make-instance 'xcb:ewmh:set-_NET_FRAME_EXTENTS
:window id
:left 0
:right 0
:top top
:bottom btm)))
(xcb:flush exwm--connection))
;; _NET_WM_DESKTOP.
((= type xcb:Atom:_NET_WM_DESKTOP)
(let ((buffer (exwm--id->buffer id)))
(when (buffer-live-p buffer)
(exwm-workspace-move-window (elt data 0) id))))
;; _NET_WM_STATE
((= type xcb:Atom:_NET_WM_STATE)
(let ((action (elt data 0))
(props (list (elt data 1) (elt data 2)))
(buffer (exwm--id->buffer id))
props-new)
;; only support _NET_WM_STATE_FULLSCREEN / _NET_WM_STATE_ADD for frames
(when (and (not buffer)
(memq xcb:Atom:_NET_WM_STATE_FULLSCREEN props)
(= action xcb:ewmh:_NET_WM_STATE_ADD))
(xcb:+request
exwm--connection
(make-instance 'xcb:ewmh:set-_NET_WM_STATE
:window id
:data (vector xcb:Atom:_NET_WM_STATE_FULLSCREEN)))
(xcb:flush exwm--connection))
(when buffer ;ensure it's managed
(with-current-buffer buffer
;; _NET_WM_STATE_FULLSCREEN
(when (or (memq xcb:Atom:_NET_WM_STATE_FULLSCREEN props)
(memq xcb:Atom:_NET_WM_STATE_ABOVE props))
(cond ((= action xcb:ewmh:_NET_WM_STATE_ADD)
(unless (exwm-layout--fullscreen-p)
(exwm-layout-set-fullscreen id))
(push xcb:Atom:_NET_WM_STATE_FULLSCREEN props-new))
((= action xcb:ewmh:_NET_WM_STATE_REMOVE)
(when (exwm-layout--fullscreen-p)
(exwm-layout-unset-fullscreen id)))
((= action xcb:ewmh:_NET_WM_STATE_TOGGLE)
(if (exwm-layout--fullscreen-p)
(exwm-layout-unset-fullscreen id)
(exwm-layout-set-fullscreen id)
(push xcb:Atom:_NET_WM_STATE_FULLSCREEN props-new)))))
;; _NET_WM_STATE_DEMANDS_ATTENTION
;; FIXME: check (may require other properties set)
(when (memq xcb:Atom:_NET_WM_STATE_DEMANDS_ATTENTION props)
(when (= action xcb:ewmh:_NET_WM_STATE_ADD)
(unless (eq exwm--frame exwm-workspace--current)
(set-frame-parameter exwm--frame 'exwm-urgency t)
(setq exwm-workspace--switch-history-outdated t)))
;; xcb:ewmh:_NET_WM_STATE_REMOVE?
;; xcb:ewmh:_NET_WM_STATE_TOGGLE?
)
(xcb:+request exwm--connection
(make-instance 'xcb:ewmh:set-_NET_WM_STATE
:window id :data (vconcat props-new)))
(xcb:flush exwm--connection)))))
((= type xcb:Atom:WM_PROTOCOLS)
(let ((type (elt data 0)))
(cond ((= type xcb:Atom:_NET_WM_PING)
(setq exwm-manage--ping-lock nil))
(t (exwm--log "Unhandled WM_PROTOCOLS of type: %d" type)))))
((= type xcb:Atom:WM_CHANGE_STATE)
(let ((buffer (exwm--id->buffer id)))
(when (and (buffer-live-p buffer)
(= (elt data 0) xcb:icccm:WM_STATE:IconicState))
(with-current-buffer buffer
(if exwm--floating-frame
(call-interactively #'exwm-floating-hide)
(bury-buffer))))))
(t
(exwm--log "Unhandled: %s(%d)"
(x-get-atom-name type exwm-workspace--current) type)))))
(defun exwm--on-SelectionClear (data _synthetic)
"Handle SelectionClear events."
(exwm--log)
(let ((obj (make-instance 'xcb:SelectionClear))
owner selection)
(xcb:unmarshal obj data)
(setq owner (slot-value obj 'owner)
selection (slot-value obj 'selection))
(when (and (eq owner exwm--wmsn-window)
(eq selection xcb:Atom:WM_S0))
(exwm-exit))))
(defun exwm--init-icccm-ewmh ()
"Initialize ICCCM/EWMH support."
(exwm--log)
;; Handle PropertyNotify event
(xcb:+event exwm--connection 'xcb:PropertyNotify #'exwm--on-PropertyNotify)
;; Handle relevant client messages
(xcb:+event exwm--connection 'xcb:ClientMessage #'exwm--on-ClientMessage)
;; Handle SelectionClear
(xcb:+event exwm--connection 'xcb:SelectionClear #'exwm--on-SelectionClear)
;; Set _NET_SUPPORTED
(xcb:+request exwm--connection
(make-instance 'xcb:ewmh:set-_NET_SUPPORTED
:window exwm--root
:data (vector
;; Root windows properties.
xcb:Atom:_NET_SUPPORTED
xcb:Atom:_NET_CLIENT_LIST
xcb:Atom:_NET_CLIENT_LIST_STACKING
xcb:Atom:_NET_NUMBER_OF_DESKTOPS
xcb:Atom:_NET_DESKTOP_GEOMETRY
xcb:Atom:_NET_DESKTOP_VIEWPORT
xcb:Atom:_NET_CURRENT_DESKTOP
;; xcb:Atom:_NET_DESKTOP_NAMES
xcb:Atom:_NET_ACTIVE_WINDOW
;; xcb:Atom:_NET_WORKAREA
xcb:Atom:_NET_SUPPORTING_WM_CHECK
;; xcb:Atom:_NET_VIRTUAL_ROOTS
;; xcb:Atom:_NET_DESKTOP_LAYOUT
;; xcb:Atom:_NET_SHOWING_DESKTOP
;; Other root window messages.
xcb:Atom:_NET_CLOSE_WINDOW
;; xcb:Atom:_NET_MOVERESIZE_WINDOW
xcb:Atom:_NET_WM_MOVERESIZE
;; xcb:Atom:_NET_RESTACK_WINDOW
xcb:Atom:_NET_REQUEST_FRAME_EXTENTS
;; Application window properties.
xcb:Atom:_NET_WM_NAME
;; xcb:Atom:_NET_WM_VISIBLE_NAME
;; xcb:Atom:_NET_WM_ICON_NAME
;; xcb:Atom:_NET_WM_VISIBLE_ICON_NAME
xcb:Atom:_NET_WM_DESKTOP
;;
xcb:Atom:_NET_WM_WINDOW_TYPE
;; xcb:Atom:_NET_WM_WINDOW_TYPE_DESKTOP
xcb:Atom:_NET_WM_WINDOW_TYPE_DOCK
xcb:Atom:_NET_WM_WINDOW_TYPE_TOOLBAR
xcb:Atom:_NET_WM_WINDOW_TYPE_MENU
xcb:Atom:_NET_WM_WINDOW_TYPE_UTILITY
xcb:Atom:_NET_WM_WINDOW_TYPE_SPLASH
xcb:Atom:_NET_WM_WINDOW_TYPE_DIALOG
xcb:Atom:_NET_WM_WINDOW_TYPE_DROPDOWN_MENU
xcb:Atom:_NET_WM_WINDOW_TYPE_POPUP_MENU
xcb:Atom:_NET_WM_WINDOW_TYPE_TOOLTIP
xcb:Atom:_NET_WM_WINDOW_TYPE_NOTIFICATION
xcb:Atom:_NET_WM_WINDOW_TYPE_COMBO
xcb:Atom:_NET_WM_WINDOW_TYPE_DND
xcb:Atom:_NET_WM_WINDOW_TYPE_NORMAL
;;
xcb:Atom:_NET_WM_STATE
;; xcb:Atom:_NET_WM_STATE_MODAL
;; xcb:Atom:_NET_WM_STATE_STICKY
;; xcb:Atom:_NET_WM_STATE_MAXIMIZED_VERT
;; xcb:Atom:_NET_WM_STATE_MAXIMIZED_HORZ
;; xcb:Atom:_NET_WM_STATE_SHADED
;; xcb:Atom:_NET_WM_STATE_SKIP_TASKBAR
;; xcb:Atom:_NET_WM_STATE_SKIP_PAGER
xcb:Atom:_NET_WM_STATE_HIDDEN
xcb:Atom:_NET_WM_STATE_FULLSCREEN
;; xcb:Atom:_NET_WM_STATE_ABOVE
;; xcb:Atom:_NET_WM_STATE_BELOW
xcb:Atom:_NET_WM_STATE_DEMANDS_ATTENTION
;; xcb:Atom:_NET_WM_STATE_FOCUSED
;;
xcb:Atom:_NET_WM_ALLOWED_ACTIONS
xcb:Atom:_NET_WM_ACTION_MOVE
xcb:Atom:_NET_WM_ACTION_RESIZE
xcb:Atom:_NET_WM_ACTION_MINIMIZE
;; xcb:Atom:_NET_WM_ACTION_SHADE
;; xcb:Atom:_NET_WM_ACTION_STICK
;; xcb:Atom:_NET_WM_ACTION_MAXIMIZE_HORZ
;; xcb:Atom:_NET_WM_ACTION_MAXIMIZE_VERT
xcb:Atom:_NET_WM_ACTION_FULLSCREEN
xcb:Atom:_NET_WM_ACTION_CHANGE_DESKTOP
xcb:Atom:_NET_WM_ACTION_CLOSE
;; xcb:Atom:_NET_WM_ACTION_ABOVE
;; xcb:Atom:_NET_WM_ACTION_BELOW
;;
xcb:Atom:_NET_WM_STRUT
xcb:Atom:_NET_WM_STRUT_PARTIAL
;; xcb:Atom:_NET_WM_ICON_GEOMETRY
;; xcb:Atom:_NET_WM_ICON
xcb:Atom:_NET_WM_PID
;; xcb:Atom:_NET_WM_HANDLED_ICONS
;; xcb:Atom:_NET_WM_USER_TIME
;; xcb:Atom:_NET_WM_USER_TIME_WINDOW
xcb:Atom:_NET_FRAME_EXTENTS
;; xcb:Atom:_NET_WM_OPAQUE_REGION
;; xcb:Atom:_NET_WM_BYPASS_COMPOSITOR
;; Window manager protocols.
xcb:Atom:_NET_WM_PING
;; xcb:Atom:_NET_WM_SYNC_REQUEST
;; xcb:Atom:_NET_WM_FULLSCREEN_MONITORS
;; Other properties.
xcb:Atom:_NET_WM_FULL_PLACEMENT)))
;; Create a child window for setting _NET_SUPPORTING_WM_CHECK
(let ((new-id (xcb:generate-id exwm--connection)))
(setq exwm--guide-window new-id)
(xcb:+request exwm--connection
(make-instance 'xcb:CreateWindow
:depth 0
:wid new-id
:parent exwm--root
:x -1
:y -1
:width 1
:height 1
:border-width 0
:class xcb:WindowClass:InputOnly
:visual 0
:value-mask xcb:CW:OverrideRedirect
:override-redirect 1))
;; Set _NET_WM_NAME. Must be set to the name of the window manager, as
;; required by wm-spec.
(xcb:+request exwm--connection
(make-instance 'xcb:ewmh:set-_NET_WM_NAME
:window new-id :data "EXWM"))
(dolist (i (list exwm--root new-id))
;; Set _NET_SUPPORTING_WM_CHECK
(xcb:+request exwm--connection
(make-instance 'xcb:ewmh:set-_NET_SUPPORTING_WM_CHECK
:window i :data new-id))))
;; Set _NET_DESKTOP_VIEWPORT (we don't support large desktop).
(xcb:+request exwm--connection
(make-instance 'xcb:ewmh:set-_NET_DESKTOP_VIEWPORT
:window exwm--root
:data [0 0]))
(xcb:flush exwm--connection))
(defun exwm--wmsn-acquire (replace)
"Acquire the WM_Sn selection.
REPLACE specifies what to do in case there already is a window
manager. If t, replace it, if nil, abort and ask the user if `ask'."
(exwm--log "%s" replace)
(with-slots (owner)
(xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:GetSelectionOwner
:selection xcb:Atom:WM_S0))
(when (/= owner xcb:Window:None)
(when (eq replace 'ask)
(setq replace (yes-or-no-p "Replace existing window manager? ")))
(when (not replace)
(user-error "Other window manager detected")))
(let ((new-owner (xcb:generate-id exwm--connection)))
(xcb:+request exwm--connection
(make-instance 'xcb:CreateWindow
:depth 0
:wid new-owner
:parent exwm--root
:x -1
:y -1
:width 1
:height 1
:border-width 0
:class xcb:WindowClass:CopyFromParent
:visual 0
:value-mask 0
:override-redirect 0))
(xcb:+request exwm--connection
(make-instance 'xcb:ewmh:set-_NET_WM_NAME
:window new-owner :data "EXWM: exwm--wmsn-window"))
(xcb:+request-checked+request-check exwm--connection
(make-instance 'xcb:SetSelectionOwner
:selection xcb:Atom:WM_S0
:owner new-owner
:time xcb:Time:CurrentTime))
(with-slots (owner)
(xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:GetSelectionOwner
:selection xcb:Atom:WM_S0))
(unless (eq owner new-owner)
(error "Could not acquire ownership of WM selection")))
;; Wait for the other window manager to terminate.
(when (/= owner xcb:Window:None)
(let (reply)
(cl-dotimes (i exwm--wmsn-acquire-timeout)
(setq reply (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:GetGeometry :drawable owner)))
(when (not reply)
(cl-return))
(message "Waiting for other window manager to quit... %ds" i)
(sleep-for 1))
(when reply
(error "Other window manager did not release selection in time"))))
;; announce
(let* ((cmd (make-instance 'xcb:ClientMessageData
:data32 (vector xcb:Time:CurrentTime
xcb:Atom:WM_S0
new-owner
0
0)))
(cm (make-instance 'xcb:ClientMessage
:window exwm--root
:format 32
:type xcb:Atom:MANAGER
:data cmd))
(se (make-instance 'xcb:SendEvent
:propagate 0
:destination exwm--root
:event-mask xcb:EventMask:NoEvent
:event (xcb:marshal cm exwm--connection))))
(xcb:+request exwm--connection se))
(setq exwm--wmsn-window new-owner))))
;;;###autoload
(cl-defun exwm-init (&optional frame)
"Initialize EXWM."
(interactive)
(exwm--log "%s" frame)
(if frame
;; The frame might not be selected if it's created by emacslicnet.
(select-frame-set-input-focus frame)
(setq frame (selected-frame)))
(when (not (eq 'x (framep frame)))
(message "[EXWM] Not running under X environment")
(cl-return-from exwm-init))
(when exwm--connection
(exwm--log "EXWM already running")
(cl-return-from exwm-init))
(condition-case err
(progn
(exwm-enable 'undo) ;never initialize again
(setq exwm--connection (xcb:connect))
(set-process-query-on-exit-flag (slot-value exwm--connection 'process)
nil) ;prevent query message on exit
(setq exwm--root
(slot-value (car (slot-value
(xcb:get-setup exwm--connection) 'roots))
'root))
;; Initialize ICCCM/EWMH support
(xcb:icccm:init exwm--connection t)
(xcb:ewmh:init exwm--connection t)
;; Try to register window manager selection.
(exwm--wmsn-acquire exwm-replace)
(when (xcb:+request-checked+request-check exwm--connection
(make-instance 'xcb:ChangeWindowAttributes
:window exwm--root
:value-mask xcb:CW:EventMask
:event-mask
xcb:EventMask:SubstructureRedirect))
(error "Other window manager is running"))
;; Disable some features not working well with EXWM
(setq use-dialog-box nil
confirm-kill-emacs #'exwm--confirm-kill-emacs)
(exwm--lock)
(exwm--init-icccm-ewmh)
(exwm-layout--init)
(exwm-floating--init)
(exwm-manage--init)
(exwm-workspace--init)
(exwm-input--init)
(exwm--unlock)
(exwm-workspace--post-init)
(exwm-input--post-init)
(run-hooks 'exwm-init-hook)
;; Manage existing windows
(exwm-manage--scan))
(user-error)
((quit error)
(exwm-exit)
;; Rethrow error
(warn "[EXWM] EXWM fails to start (%s: %s)" (car err) (cdr err)))))
;;;###autoload
(defun exwm-exit ()
"Exit EXWM."
(interactive)
(exwm--log)
(run-hooks 'exwm-exit-hook)
(setq confirm-kill-emacs nil)
;; Exit modules.
(exwm-input--exit)
(exwm-manage--exit)
(exwm-workspace--exit)
(exwm-floating--exit)
(exwm-layout--exit)
(when exwm--connection
(xcb:flush exwm--connection)
(xcb:disconnect exwm--connection))
(setq exwm--connection nil))
;;;###autoload
(defun exwm-enable (&optional undo)
"Enable/Disable EXWM."
(exwm--log "%s" undo)
(pcase undo
(`undo ;prevent reinitialization
(remove-hook 'window-setup-hook #'exwm-init)
(remove-hook 'after-make-frame-functions #'exwm-init))
(`undo-all ;attempt to revert everything
(remove-hook 'window-setup-hook #'exwm-init)
(remove-hook 'after-make-frame-functions #'exwm-init)
(remove-hook 'kill-emacs-hook #'exwm--server-stop)
(dolist (i exwm-blocking-subrs)
(advice-remove i #'exwm--server-eval-at)))
(_ ;enable EXWM
(setq frame-resize-pixelwise t ;mandatory; before init
window-resize-pixelwise t)
;; Ignore unrecognized command line arguments. This can be helpful
;; when EXWM is launched by some session manager.
(push #'vector command-line-functions)
;; In case EXWM is to be started from a graphical Emacs instance.
(add-hook 'window-setup-hook #'exwm-init t)
;; In case EXWM is to be started with emacsclient.
(add-hook 'after-make-frame-functions #'exwm-init t)
;; Manage the subordinate Emacs server.
(add-hook 'kill-emacs-hook #'exwm--server-stop)
(dolist (i exwm-blocking-subrs)
(advice-add i :around #'exwm--server-eval-at)))))
(defun exwm--server-stop ()
"Stop the subordinate Emacs server."
(exwm--log)
(server-force-delete exwm--server-name)
(when exwm--server-process
(delete-process exwm--server-process)
(setq exwm--server-process nil)))
(defun exwm--server-eval-at (&rest args)
"Wrapper of `server-eval-at' used to advice subrs."
;; Start the subordinate Emacs server if it's not alive
(exwm--log "%s" args)
(unless (server-running-p exwm--server-name)
(when exwm--server-process (delete-process exwm--server-process))
(setq exwm--server-process
(start-process exwm--server-name
nil
(car command-line-args) ;The executable file
"-d" (frame-parameter nil 'display)
"-Q"
(concat "--daemon=" exwm--server-name)
"--eval"
;; Create an invisible frame
"(make-frame '((window-system . x) (visibility)))"))
(while (not (server-running-p exwm--server-name))
(sit-for 0.001)))
(server-eval-at
exwm--server-name
`(progn (select-frame (car (frame-list)))
(let ((result ,(nconc (list (make-symbol (subr-name (car args))))
(cdr args))))
(pcase (type-of result)
;; Return the name of a buffer
(`buffer (buffer-name result))
;; We blindly convert all font objects to their XLFD names. This
;; might cause problems of course, but it still has a chance to
;; work (whereas directly passing font objects would merely
;; raise errors).
((or `font-entity `font-object `font-spec)
(font-xlfd-name result))
;; Passing following types makes little sense
((or `compiled-function `finalizer `frame `hash-table `marker
`overlay `process `window `window-configuration))
;; Passing the name of a subr
(`subr (make-symbol (subr-name result)))
;; For other types, return the value as-is.
(t result))))))
(defun exwm--confirm-kill-emacs (prompt &optional force)
"Confirm before exiting Emacs."
(exwm--log)
(when (cond
((and force (not (eq force 'no-check)))
;; Force killing Emacs.
t)
((or (eq force 'no-check) (not exwm--id-buffer-alist))
;; Check if there's any unsaved file.
(pcase (catch 'break
(let ((kill-emacs-query-functions
(append kill-emacs-query-functions
(list (lambda ()
(throw 'break 'break))))))
(save-buffers-kill-emacs)))
(`break (y-or-n-p prompt))
(x x)))
(t
(yes-or-no-p (format "[EXWM] %d window(s) will be destroyed. %s"
(length exwm--id-buffer-alist) prompt))))