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diff --git a/exwm-core.el b/exwm-core.el new file mode 100644 index 0000000000..e0d644d941 --- /dev/null +++ b/exwm-core.el @@ -0,0 +1,411 @@ +;;; exwm-core.el --- Core definitions -*- lexical-binding: t -*- + +;; Copyright (C) 2015-2024 Free Software Foundation, Inc. + +;; Author: Chris Feng <chris.w.feng@gmail.com> + +;; This file is part of GNU Emacs. + +;; GNU Emacs is free software: you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation, either version 3 of the License, or +;; (at your option) any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. + +;;; Commentary: + +;; This module includes core definitions of variables, macros, functions, etc +;; shared by various other modules. + +;;; Code: + +(require 'kmacro) + +(require 'xcb) +(require 'xcb-icccm) +(require 'xcb-ewmh) +(require 'xcb-debug) + +(defgroup exwm-debug nil + "Debugging." + :group 'exwm) + +(defcustom exwm-debug-log-time-function #'exwm-debug-log-uptime + "Function used for generating timestamps in `exwm-debug' logs. + +Here are some predefined candidates: +`exwm-debug-log-uptime': Display the uptime of this Emacs instance. +`exwm-debug-log-time': Display time of day. +`nil': Disable timestamp." + :type `(choice (const :tag "Emacs uptime" ,#'exwm-debug-log-uptime) + (const :tag "Time of day" ,#'exwm-debug-log-time) + (const :tag "Off" nil) + (function :tag "Other")) + :set (lambda (symbol value) + (set-default symbol value) + ;; Also change the format for XELB to make logs consistent + ;; (as they share the same buffer). + (setq xcb-debug:log-time-function value))) + +(defalias 'exwm-debug-log-uptime 'xcb-debug:log-uptime + "Add uptime to `exwm-debug' logs.") + +(defalias 'exwm-debug-log-time 'xcb-debug:log-time + "Add time of day to `exwm-debug' logs.") + +(defvar exwm--connection nil "X connection.") + +(defvar exwm--terminal nil + "Terminal corresponding to `exwm--connection'.") + +(defvar exwm--wmsn-window nil + "An X window owning the WM_S0 selection.") + +(defvar exwm--wmsn-acquire-timeout 3 + "Number of seconds to wait for other window managers to release the selection.") + +(defvar exwm--guide-window nil + "An X window separating workspaces and X windows.") + +(defvar exwm--id-buffer-alist nil "Alist of (<X window ID> . <Emacs buffer>).") + +(defvar exwm--root nil "Root window.") + +(defvar exwm-input--global-prefix-keys) +(defvar exwm-input--simulation-keys) +(defvar exwm-input-line-mode-passthrough) +(defvar exwm-input-prefix-keys) +(declare-function exwm-input--fake-key "exwm-input.el" (event)) +(declare-function exwm-input--on-KeyPress-line-mode "exwm-input.el" + (key-press raw-data)) +(declare-function exwm-floating-hide "exwm-floating.el") +(declare-function exwm-floating-toggle-floating "exwm-floating.el") +(declare-function exwm-input-release-keyboard "exwm-input.el") +(declare-function exwm-input-send-next-key "exwm-input.el" (times)) +(declare-function exwm-layout-set-fullscreen "exwm-layout.el" (&optional id)) +(declare-function exwm-layout-toggle-mode-line "exwm-layout.el") +(declare-function exwm-manage--kill-buffer-query-function "exwm-manage.el") +(declare-function exwm-workspace-move-window "exwm-workspace.el" + (frame-or-index &optional id)) + +(define-minor-mode exwm-debug + "Debug-logging enabled if non-nil." + :global t + :group 'exwm-debug) + +(defmacro exwm--debug (&rest forms) + "Evaluate FORMS if mode `exwm-debug' is active." + (when exwm-debug `(progn ,@forms))) + +(defmacro exwm--log (&optional format-string &rest objects) + "Emit a message prepending the name of the function being executed. + +FORMAT-STRING is a string specifying the message to output, as in +`format'. The OBJECTS arguments specify the substitutions." + (unless format-string (setq format-string "")) + `(when exwm-debug + (xcb-debug:message ,(concat "%s%s:\t" format-string "\n") + (if exwm-debug-log-time-function + (funcall exwm-debug-log-time-function) + "") + (xcb-debug:compile-time-function-name) + ,@objects) + nil)) + +(defsubst exwm--id->buffer (id) + "X window ID => Emacs buffer." + (declare (indent defun)) + (cdr (assoc id exwm--id-buffer-alist))) + +(defsubst exwm--buffer->id (buffer) + "Emacs buffer BUFFER => X window ID." + (declare (indent defun)) + (car (rassoc buffer exwm--id-buffer-alist))) + +(defun exwm--lock (&rest _args) + "Lock (disable all events)." + (exwm--log) + (xcb:+request exwm--connection + (make-instance 'xcb:ChangeWindowAttributes + :window exwm--root + :value-mask xcb:CW:EventMask + :event-mask xcb:EventMask:NoEvent)) + (xcb:flush exwm--connection)) + +(defun exwm--unlock (&rest _args) + "Unlock (enable all events)." + (exwm--log) + (xcb:+request exwm--connection + (make-instance 'xcb:ChangeWindowAttributes + :window exwm--root + :value-mask xcb:CW:EventMask + :event-mask (eval-when-compile + (logior xcb:EventMask:SubstructureRedirect + xcb:EventMask:StructureNotify)))) + (xcb:flush exwm--connection)) + +(defun exwm--set-geometry (xwin x y width height) + "Set the geometry of X window XWIN to WIDTHxHEIGHT+X+Y. + +Nil can be passed as placeholder." + (exwm--log "Setting #x%x to %sx%s+%s+%s" xwin width height x y) + (xcb:+request exwm--connection + (make-instance 'xcb:ConfigureWindow + :window xwin + :value-mask (logior (if x xcb:ConfigWindow:X 0) + (if y xcb:ConfigWindow:Y 0) + (if width xcb:ConfigWindow:Width 0) + (if height xcb:ConfigWindow:Height 0)) + :x x :y y :width width :height height))) + +(defun exwm--intern-atom (atom &optional conn) + "Intern X11 ATOM. +If CONN is non-nil, use it instead of the value of the variable +`exwm--connection'." + (slot-value (xcb:+request-unchecked+reply (or conn exwm--connection) + (make-instance 'xcb:InternAtom + :only-if-exists 0 + :name-len (length atom) + :name atom)) + 'atom)) + +(defmacro exwm--defer (secs function &rest args) + "Defer the execution of FUNCTION. + +The action is to call FUNCTION with arguments ARGS. If Emacs is not idle, +defer the action until Emacs is idle. Otherwise, defer the action until at +least SECS seconds later." + `(run-with-idle-timer (+ (float-time (or (current-idle-time) + (seconds-to-time (- ,secs)))) + ,secs) + nil + ,function + ,@args)) + +(defsubst exwm--terminal-p (&optional frame) + "Return t when FRAME's terminal is EXWM's terminal. +If FRAME is null, use selected frame." + (declare (indent defun)) + (eq exwm--terminal (frame-terminal frame))) + +(defun exwm--get-client-event-mask () + "Return event mask set on all managed windows." + (logior xcb:EventMask:StructureNotify + xcb:EventMask:PropertyChange + (if mouse-autoselect-window + xcb:EventMask:EnterWindow 0))) + +(defun exwm--color->pixel (color) + "Convert COLOR to PIXEL (index in TrueColor colormap)." + (when (and color + (eq (x-display-visual-class) 'true-color)) + (let ((rgb (color-values color))) + (logior (ash (ash (pop rgb) -8) 16) + (ash (ash (pop rgb) -8) 8) + (ash (pop rgb) -8))))) + +(defun exwm--get-visual-depth-colormap (conn id) + "Get visual, depth and colormap from X window ID. +Return a three element list with the respective results. + +If CONN is non-nil, use it instead of the value of the variable +`exwm--connection'." + (let (ret-visual ret-depth ret-colormap) + (with-slots (visual colormap) + (xcb:+request-unchecked+reply conn + (make-instance 'xcb:GetWindowAttributes :window id)) + (setq ret-visual visual) + (setq ret-colormap colormap)) + (with-slots (depth) + (xcb:+request-unchecked+reply conn + (make-instance 'xcb:GetGeometry :drawable id)) + (setq ret-depth depth)) + (list ret-visual ret-depth ret-colormap))) + +;; Internal variables +(defvar-local exwm--id nil) ;window ID +(defvar-local exwm--configurations nil) ;initial configurations. +(defvar-local exwm--frame nil) ;workspace frame +(defvar-local exwm--floating-frame nil) ;floating frame +(defvar-local exwm--mode-line-format nil) ;save mode-line-format +(defvar-local exwm--floating-frame-position nil) ;set when hidden. +(defvar-local exwm--fixed-size nil) ;fixed size +(defvar-local exwm--selected-input-mode 'line-mode + "Input mode as selected by the user. +One of `line-mode' or `char-mode'.") +(defvar-local exwm--input-mode 'line-mode + "Actual input mode, i.e. whether mouse and keyboard are grabbed.") +;; Properties +(defvar-local exwm--desktop nil "_NET_WM_DESKTOP.") +(defvar-local exwm-window-type nil "_NET_WM_WINDOW_TYPE.") +(defvar-local exwm--geometry nil) +(defvar-local exwm-class-name nil "Class name in WM_CLASS.") +(defvar-local exwm-instance-name nil "Instance name in WM_CLASS.") +(defvar-local exwm-title nil "Window title (either _NET_WM_NAME or WM_NAME).") +(defvar-local exwm--title-is-utf8 nil) +(defvar-local exwm-transient-for nil "WM_TRANSIENT_FOR.") +(defvar-local exwm--protocols nil) +(defvar-local exwm-state xcb:icccm:WM_STATE:NormalState "WM_STATE.") +(defvar-local exwm--ewmh-state nil "_NET_WM_STATE.") +;; _NET_WM_NORMAL_HINTS +(defvar-local exwm--normal-hints-x nil) +(defvar-local exwm--normal-hints-y nil) +(defvar-local exwm--normal-hints-width nil) +(defvar-local exwm--normal-hints-height nil) +(defvar-local exwm--normal-hints-min-width nil) +(defvar-local exwm--normal-hints-min-height nil) +(defvar-local exwm--normal-hints-max-width nil) +(defvar-local exwm--normal-hints-max-height nil) +;; (defvar-local exwm--normal-hints-win-gravity nil) +;; WM_HINTS +(defvar-local exwm--hints-input nil) +(defvar-local exwm--hints-urgency nil) +;; _MOTIF_WM_HINTS +(defvar-local exwm--mwm-hints-decorations t) + +(defvar exwm-mode-map + (let ((map (make-sparse-keymap))) + (define-key map "\C-c\C-d\C-l" #'xcb-debug:clear) + (define-key map "\C-c\C-d\C-m" #'xcb-debug:mark) + (define-key map "\C-c\C-d\C-t" #'exwm-debug) + (define-key map "\C-c\C-f" #'exwm-layout-set-fullscreen) + (define-key map "\C-c\C-h" #'exwm-floating-hide) + (define-key map "\C-c\C-k" #'exwm-input-release-keyboard) + (define-key map "\C-c\C-m" #'exwm-workspace-move-window) + (define-key map "\C-c\C-q" #'exwm-input-send-next-key) + (define-key map "\C-c\C-t\C-f" #'exwm-floating-toggle-floating) + (define-key map "\C-c\C-t\C-m" #'exwm-layout-toggle-mode-line) + map) + "Keymap for `exwm-mode'.") + +(defvar exwm--kmacro-map + (let ((map (make-sparse-keymap))) + (define-key map [t] + (lambda () + (interactive) + (cond + ((or exwm-input-line-mode-passthrough + ;; Do not test `exwm-input--during-command'. + (active-minibuffer-window) + (memq last-input-event exwm-input--global-prefix-keys) + (memq last-input-event exwm-input-prefix-keys) + (lookup-key exwm-mode-map (vector last-input-event)) + (gethash last-input-event exwm-input--simulation-keys)) + (set-transient-map (make-composed-keymap (list exwm-mode-map + global-map))) + (push last-input-event unread-command-events)) + (t + (exwm-input--fake-key last-input-event))))) + map) + "Keymap used when executing keyboard macros.") + +;; This menu mainly acts as an reminder for users. Thus it should be as +;; detailed as possible, even some entries do not make much sense here. +;; Also, inactive entries should be disabled rather than hidden. +(easy-menu-define exwm-mode-menu exwm-mode-map + "Menu for `exwm-mode'." + '("EXWM" + "---" + "*General*" + "---" + ["Toggle floating" exwm-floating-toggle-floating] + ["Toggle fullscreen mode" exwm-layout-toggle-fullscreen] + ["Hide window" exwm-floating-hide exwm--floating-frame] + ["Close window" (kill-buffer (current-buffer))] + + "---" + "*Resizing*" + "---" + ["Toggle mode-line" exwm-layout-toggle-mode-line] + ["Enlarge window vertically" exwm-layout-enlarge-window] + ["Enlarge window horizontally" exwm-layout-enlarge-window-horizontally] + ["Shrink window vertically" exwm-layout-shrink-window] + ["Shrink window horizontally" exwm-layout-shrink-window-horizontally] + + "---" + "*Keyboard*" + "---" + ["Toggle keyboard mode" exwm-input-toggle-keyboard] + ["Send key" exwm-input-send-next-key (eq exwm--input-mode 'line-mode)] + ;; This is merely a reference. + ("Send simulation key" :filter + (lambda (&rest _args) + (let (result) + (maphash + (lambda (key value) + (when (sequencep key) + (setq result (append result + `([ + ,(format "Send '%s'" + (key-description value)) + (lambda () + (interactive) + (dolist (i ',value) + (exwm-input--fake-key i))) + :keys ,(key-description key)]))))) + exwm-input--simulation-keys) + result))) + + ["Define global binding" exwm-input-set-key] + + "---" + "*Workspace*" + "---" + ["Add workspace" exwm-workspace-add] + ["Delete current workspace" exwm-workspace-delete] + ["Move workspace to" exwm-workspace-move] + ["Swap workspaces" exwm-workspace-swap] + ["Move X window to" exwm-workspace-move-window] + ["Move X window from" exwm-workspace-switch-to-buffer] + ["Toggle minibuffer" exwm-workspace-toggle-minibuffer] + ["Switch workspace" exwm-workspace-switch] + ;; Place this entry at bottom to avoid selecting others by accident. + ("Switch to" :filter + (lambda (&rest _args) + (mapcar (lambda (i) + `[,(format "Workspace %d" i) + (lambda () + (interactive) + (exwm-workspace-switch ,i)) + (/= ,i exwm-workspace-current-index)]) + (number-sequence 0 (1- (exwm-workspace--count)))))))) + +(define-derived-mode exwm-mode nil "EXWM" + "Major mode for managing X windows. + +\\{exwm-mode-map}" + ;; + (setq mode-name + '(:eval (propertize "EXWM" 'face + (when (cl-some (lambda (i) + (frame-parameter i 'exwm-urgency)) + exwm-workspace--list) + 'font-lock-warning-face)))) + ;; Change major-mode is not allowed + (add-hook 'change-major-mode-hook #'kill-buffer nil t) + ;; Kill buffer -> close window + (add-hook 'kill-buffer-query-functions + #'exwm-manage--kill-buffer-query-function nil t) + ;; Redirect events when executing keyboard macros. + (push `(executing-kbd-macro . ,exwm--kmacro-map) + minor-mode-overriding-map-alist) + (setq buffer-read-only t + cursor-type nil + left-margin-width nil + right-margin-width nil + left-fringe-width 0 + right-fringe-width 0 + vertical-scroll-bar nil)) + + + +(provide 'exwm-core) + +;;; exwm-core.el ends here |