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tvl-depot/third_party/exwm/exwm.el
Vincent Ambo 57b37cdc83 subtree(3p/exwm): Update to upstream '10bd1223' 
A lot has happened in the meantime (EXWM maintainer change) and this
pulls in all the relevant changes since then.

It may become unnecessary to keep EXWM subtreed, but we'll get to that
later.

Change-Id: I45cc06d747d84b3d28fd0db0e4bb3b749a956583
2021-12-08 22:17:42 +03:00

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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))))
;; Run `kill-emacs-hook' (`server-force-stop' excluded) before Emacs
;; frames are unmapped so that errors (if any) can be visible.
(if (memq #'server-force-stop kill-emacs-hook)
(progn
(setq kill-emacs-hook (delq #'server-force-stop kill-emacs-hook))
(run-hooks 'kill-emacs-hook)
(setq kill-emacs-hook (list #'server-force-stop)))
(run-hooks 'kill-emacs-hook)
(setq kill-emacs-hook nil))
;; Exit each module, destroying all resources created by this connection.
(exwm-exit)
;; Set the return value.
t))
(provide 'exwm)
;;; exwm.el ends here
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