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+;;; jao-wayland.el --- interacting with wayland compositors  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2022, 2023  jao
+
+;; Author: jao <mail@jao.io>
+;; Keywords: convenience
+
+;; 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-shell)
+(require 'jao-pdf)
+(require 'jao-tracking)
+
+;;; wayland
+(defvar jao-wayland-enabled
+  (string= "wayland" (or (getenv "XDG_SESSION_TYPE") "")))
+
+(defsubst jao-wayland-type (&rest args)
+  (apply #'jao-shell-exec* t "wtype" args))
+
+;;; river
+(defvar jao-river-enabled (jao-shell-running-p "river"))
+(defun jao-river-enabled-p () jao-river-enabled)
+
+(defsubst jao-river-to-ws (n)
+  (jao-wayland-type "-M" "win" (format "%s" n)))
+
+(defsubst jao-river-window-list ()
+  (alist-get 'toplevels
+             (jao-shell-output "lswt -j"
+                               (lambda ()
+                                 (let ((json-false nil)) (json-read))))))
+
+(defun jao-river-focused ()
+  (seq-some (lambda (w) (and (alist-get 'activated w) w))
+            (jao-river-window-list)))
+
+(defsubst jao-river-get-focused-title ()
+  (alist-get 'title (jao-river-focused)))
+
+(defsubst jao-river-get-focused-app-id ()
+  (alist-get 'app-id (jao-river-focused)))
+
+(defun jao-river-focus-window (title &optional rx)
+  (let* ((ws (jao-river-window-list))
+         (fltr (if rx #'string-match-p #'string=))
+         (w (seq-find (lambda (w)
+                        (or (funcall fltr title (alist-get 'app_id w ""))
+                            (funcall fltr title (alist-get 'title w ""))))
+                      ws)))
+    (or (alist-get 'activated w)
+        (seq-some (lambda (_ignored)
+                    (jao-shell-exec "riverctl focus-view next" t)
+                    (or (funcall fltr title (jao-river-get-focused-app-id))
+                        (funcall fltr title (jao-river-get-focused-title))))
+                  (and w ws)))))
+
+(defun jao-river-zathura-to-org ()
+  (let ((title (jao-river-get-focused-title)))
+    (jao-river-to-ws 1)
+    (jao-org-open-from-zathura title t)))
+
+(defun jao-river-zathura-kill-link ()
+  (when-let* ((title (jao-river-get-focused-title))
+              (lnk (jao-pdf-zathura-org-link title)))
+    (jao-river-to-ws 1)
+    (kill-new lnk)
+    (message "Link to %s killed" title)))
+
+(defun jao-river-find-zathura-window (file)
+  (let ((frx (regexp-quote (file-name-nondirectory file))))
+    (seq-some (lambda (w)
+                (and (string-suffix-p ".zathura" (alist-get 'app_id w ""))
+                     (string-match-p frx (alist-get 'title w ""))
+                     w))
+              (jao-river-window-list))))
+
+(defun jao-river-open-with-zathura (file page)
+  (let ((wd (jao-river-find-zathura-window file)))
+    (jao-river-to-ws 3)
+    (or (and wd (jao-river-focus-window (alist-get 'title wd)))
+        (jao-shell-exec* "riverctl" "spawn" (jao-pdf-zathura-open-cmd file page)))
+    (when page (sit-for 0.2) (jao-wayland-type (format "%dg" page)))))
+
+(defun jao-river-set-wallpaper (f)
+  (jao-shell-kill-p "swaybg")
+  (jao-shell-exec* "riverctl" "spawn" (concat "swaybg -m fill -i " f)))
+
+(defun jao-river-restart-i3bar ()
+  (interactive)
+  (jao-shell-kill-p "i3bar-river")
+  (jao-shell-exec "riverctl spawn i3bar-river")
+  (sit-for 0.2)
+  (jao-tracking-set-log ""))
+
+(defun jao-river-toggle-emacs ()
+  (let ((erx "^p?emacs\\(client\\)?\\|\\(.* - emacs\\)"))
+    (if (or (string-match-p erx (jao-river-get-focused-title))
+            (string-match-p erx (jao-river-get-focused-app-id)))
+        (jao-shell-exec "riverctl focus-previous-tags")
+      (jao-river-to-ws 1)
+      (unless (jao-river-focus-window erx t)
+        (jao-shell-exec* "riverctl" "spawn" "efoot")))))
+
+(defun jao-river-toggle-firefox ()
+  (if (string-match-p "Firefox" (or (jao-river-get-focused-app-id) ""))
+      (jao-river-to-ws 1)
+    (jao-river-to-ws 2)
+    (unless (jao-river-focus-window "Firefox")
+      (jao-shell-exec* "riverctl" "spawn" "firefox"))))
+
+;;; sway
+(defun jao-sway-msg (msg)
+  (shell-command (format "swaymsg '%s' >/dev/null" msg)))
+
+(defmacro jao-def-swaymsg (name msg)
+  `(defun ,(intern (format "jao-sway-%s" name)) ()
+     (interactive)
+     (jao-sway-msg ,msg)))
+
+(jao-def-swaymsg firefox "[app_id=Firefox] focus")
+(jao-def-swaymsg pemacs "[app_id=pemacs] focus")
+
+(defvar jao-sway-enabled (jao-shell-running-p "sway"))
+
+(defconst jao-sway-get-active-title
+  "swaymsg -t get_tree | jq '.. | select(.type?) | select(.focused==true).name'")
+
+(defconst jao-sway-get-active-app
+  "swaymsg -t get_tree | jq '.. | select(.type?) | select(.focused==true).app_id'")
+
+(defun jao-sway-get-active-title ()
+  (let ((tl (jao-shell-string jao-sway-get-active-title)))
+    (and (string-match "\"\\(.+\\)\"" tl) (match-string 1 tl))))
+
+(defun jao-sway-get-active-app ()
+  (let ((tl (jao-shell-string jao-sway-get-active-app)))
+    (and (string-match "\"\\(.+\\)\"" tl) (match-string 1 tl))))
+
+(defun jao-sway-zathura-org ()
+  (jao-org-open-from-zathura (jao-sway-get-active-title) t))
+
+(defun jao-sway-open-with-zathura (file page)
+  (let* ((n (file-name-nondirectory file))
+         (m (format "[title=\"%s\" app_id=\".*zathura\"] focus" n)))
+    (jao-sway-msg "workspace number 3")
+    (unless (= 0 (jao-sway-msg m))
+      (jao-shell-exec (jao-pdf-zathura-open-cmd file page)))
+    (when page (sit-for 0.2) (jao-wayland-type (format "%dg" page)))))
+
+(defun jao-sway-set-wallpaper (f)
+  (jao-sway-msg (format "output * bg %s fill" f)))
+
+(defun jao-sway-run-or-focus (cmd &optional ws)
+  (if (jao-shell-running-p "firefox")
+      (jao-sway-msg (format "[app_id=%s] focus" cmd))
+    (jao-sway-msg (format "workspace %s" (or ws 2)))
+    (start-process-shell-command cmd nil cmd)))
+
+(defun jao-sway-run-or-focus-firefox ()
+  (interactive)
+  (jao-sway-run-or-focus "firefox"))
+
+(defun jao-sway-toggle-emacs ()
+  (if (string-match-p "p?emacs" (jao-sway-get-active-app))
+      (jao-sway-firefox)
+    (jao-sway-pemacs)))
+
+(provide 'jao-wayland)
+;;; jao-wayland.el ends here