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;;; jao-exwm.el --- exwm utilities -*- lexical-binding: t; -*-
;; Copyright (C) 2026 jao
;; Author: jao <mail@jao.io>
;; This program 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.
;; This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
(require 'jao-minibuffer)
;;; Helpers
(defvar jao-exwm-use-afio t)
(defun jao-exwm-send-str (str)
(dolist (k (string-to-list str))
(exwm-input--fake-key k)))
;;; Minibuffer and system tray
(setq jao-minibuffer-frame-width 271)
(add-hook 'exwm-workspace-switch-hook #'jao-minibuffer-refresh)
(require 'exwm-systemtray)
(exwm-systemtray-mode 1)
(defun jao-exwm--watch-tray (sym newval op where)
(setq jao-minibuffer-right-margin (/ newval (string-pixel-width "a")))
(jao-minibuffer-refresh))
(add-variable-watcher 'exwm-systemtray-width #'jao-exwm--watch-tray)
;;; Buffers
(defvar-local jao-exwm--name nil)
(defvar jao-exwm--current-name nil)
(defun jao-exwm--check-name (name)
(or (string= jao-exwm--name name)
(string= (buffer-name) name)
(string= exwm-class-name name)
(string= exwm-title name)))
(defun jao-exwm-find-class-buffer (cln)
(if (jao-exwm--check-name cln)
(current-buffer)
(let* ((cur-buff (current-buffer))
(bfs (seq-filter (lambda (b)
(and (not (eq b cur-buff))
(with-current-buffer b
(jao-exwm--check-name cln))))
(buffer-list))))
(when (car bfs) (car (reverse bfs))))))
(defun jao-exwm-switch-to-class/title (cln)
(interactive)
(when cln
(if (jao-exwm--check-name cln)
(current-buffer)
(when-let* ((b (jao-exwm-find-class-buffer cln)))
(pop-to-buffer b)))))
(defun jao-exwm-switch-to-next-class ()
(interactive)
(jao-exwm-switch-to-class/title exwm-class-name))
(defun jao-exwm-switch-to-next-x ()
(interactive)
(let ((bfs (seq-filter (lambda (b)
(with-current-buffer b
(derived-mode-p 'exwm-mode)))
(buffer-list (window-frame)))))
(when (car bfs) (switch-to-buffer (car (reverse bfs))))))
;;; Buffer names
(defun jao-exwm--use-title-p ()
(and exwm-title (not (string-blank-p exwm-title))))
(defun jao-exwm-rename-buffer/class ()
(unless (jao-exwm--use-title-p)
(exwm-workspace-rename-buffer exwm-class-name)))
(defun jao-exwm-rename-buffer/title ()
(cond ((or (not exwm-instance-name)
(jao-exwm--use-title-p))
(exwm-workspace-rename-buffer exwm-title))
((string= "Zathura" exwm-class-name)
(exwm-workspace-rename-buffer
(format "zathura: %s" (file-name-nondirectory exwm-title))))))
(defun jao-exwm--set-exwm-name ()
(when (not jao-exwm--name)
(setq jao-exwm--name jao-exwm--current-name
jao-exwm--current-name nil)))
(add-hook 'exwm-mode-hook 'jao-exwm--set-exwm-name)
(add-hook 'exwm-update-class-hook 'jao-exwm-rename-buffer/class)
(add-hook 'exwm-update-title-hook 'jao-minibuffer-refresh)
(add-hook 'exwm-update-title-hook 'jao-exwm-rename-buffer/title)
;;; Float windows
(defvar jao-exwm-max-x (x-display-pixel-width))
(defvar jao-exwm-max-y (x-display-pixel-height))
(defun jao-exwm--float-to (x y &optional w h)
(let* ((w (or w (frame-pixel-width)))
(h (or h (frame-pixel-height)))
(x (if (< x 0) (- jao-exwm-max-x (- x) w) x))
(y (if (< y 0) (- jao-exwm-max-y (- y) h) y))
(p (or (frame-parameter nil 'jao-position) (frame-position))))
(exwm-floating-move (- x (car p)) (- y (cdr p)))
(exwm-layout-enlarge-window-horizontally (- w (frame-pixel-width)))
(exwm-layout-enlarge-window (- h (frame-pixel-height)))
(set-frame-parameter nil 'jao-position (cons x y))))
(defun jao-exwm--center-float (&optional w h)
(interactive)
(let* ((mx jao-exwm-max-x)
(my jao-exwm-max-y)
(w (or w (frame-pixel-width)))
(h (or h (/ (* w my) mx))))
(jao-exwm--float-to (/ (- mx w) 2) (/ (- my h) 2) w h)))
(defun jao-exwm--setup-float ()
(set-frame-parameter nil 'jao-position nil)
(cond ((member exwm-class-name '("firefox" "Firefox" "Sofice"))
(jao-exwm--center-float 900 600))
((member exwm-class-name '("mpv" "vlc"))
(jao-exwm--center-float 1200))))
(defvar jao-exwm-floating-classes '("mpv" "vlc"))
(setq jao-exwm-floating-classes nil)
(defun jao-exwm--maybe-float ()
(when (member exwm-class-name jao-exwm-floating-classes)
(when (not exwm--floating-frame)
(exwm-floating-toggle-floating))))
(add-hook 'exwm-floating-setup-hook #'jao-exwm--setup-float)
(add-hook 'exwm-manage-finish-hook #'jao-exwm--maybe-float)
;;; App runners
;;; App runner helpers
(defun jao-exwm-run (command)
(interactive
(list (read-shell-command "$ "
(if current-prefix-arg
(cons (concat " " (buffer-file-name)) 0)
""))))
(setq jao-exwm--current-name nil)
(start-process-shell-command command nil command))
(defmacro jao-exwm-runner (&rest args)
`(lambda () (interactive) (start-process "" nil ,@args)))
(defun jao-exwm-workspace (n)
(if jao-exwm-use-afio
(jao-afio-goto-nth n)
(exwm-workspace-switch-create n)))
(defmacro jao-def-exwm-runner (name ws class &rest args)
`(defun ,name (&rest other-args)
(interactive)
,@(when ws `((jao-exwm-workspace ,ws)))
(if (jao-exwm-switch-to-class/title ,class)
,(cond ((equal ws -1) '(delete-other-windows))
((stringp (car args)) (cdr args))
(t args))
(setq jao-exwm--current-name ,class)
,(if (stringp (car args))
`(start-process-shell-command ,(car args)
"* exwm - console *"
(string-join (append (list ,@args)
other-args)
" "))
args))))
(defmacro jao-def-exwm-toggler (name ws class &rest args)
(let ((toggler (intern (format "%s*" name)))
(arg (gensym)))
`(progn (jao-def-exwm-runner ,name ,ws ,class ,@args)
(defun ,toggler (,arg)
(interactive "P")
(if (and (not ,arg) (equal exwm-class-name ,class))
(jao-afio-toggle)
(,name))))))
(provide 'jao-exwm)
;;; jao-exwm.el ends here
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