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Diffstat (limited to 'third_party/emacs/exwm/exwm.el')
| -rw-r--r-- | third_party/emacs/exwm/exwm.el | 1019 |
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diff --git a/third_party/emacs/exwm/exwm.el b/third_party/emacs/exwm/exwm.el new file mode 100644 index 000000000000..fc96ac75098c --- /dev/null +++ b/third_party/emacs/exwm/exwm.el @@ -0,0 +1,1019 @@ +;;; exwm.el --- Emacs X Window Manager -*- lexical-binding: t -*- + +;; Copyright (C) 2015-2020 Free Software Foundation, Inc. + +;; Author: Chris Feng <chris.w.feng@gmail.com> +;; Maintainer: Chris Feng <chris.w.feng@gmail.com> +;; Version: 0.24 +;; 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 |