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;; Time-stamp: <2019-09-11 14:35:00 (tslil@basingstoke)>

(defun adjust-volume (mixer adjust)
  (let ((tail " | tail -n 1")
        (sed (concat " | sed 's/.*\\[\\([0-9]*.\\)\\] "
                     "\\[.*dB\\] \\[\\(.*\\)\\]$/"
                     mixer
                     " \\1 \\2/'")))
    (shell-command
     (concat
      (cond ((string-equal "+" adjust) (concat "amixer set " mixer " 2%+"))
            ((string-equal "-" adjust) (concat "amixer set " mixer " 2%-"))
            (t (concat "amixer set " mixer " toggle")))
      tail
      sed))))

(defun banish-rat ()
  (interactive)
  (shell-command "xdotool mousemove 1366 768")
  (message "Rat banished."))

(use-package exwm
  :if (window-system)
  :ensure t
  :demand
  :config

  (setq exwm-workspace-number 1
        exwm-workspace-switch-create-limit 5
        exwm-workspace-show-all-buffers nil)

  (add-hook 'exwm-update-class-hook
            (lambda ()
              (exwm-workspace-rename-buffer exwm-class-name)))

  ;; -------------------------------------------------------------------
  ;; Global key binds

  (setq exwm-input-simulation-keys
        '(([?\C-b] . [left])
          ([?\C-f] . [right])
          ([?\C-p] . [up])
          ([?\C-n] . [down])
          ([?\C-a] . [home])
          ([?\C-e] . [end])
          ([?\M-v] . [prior])
          ([?\C-v] . [next])
          ([?\C-s] . [C-f])
          ;;([?\C-d] . [delete])
          ;;([?\C-k] . [S-end delete])
          ))

  ;; reset
  (exwm-input-set-key (kbd "s-r") 'exwm-reset)

  ;; workspaces
  (exwm-input-set-key (kbd "s-e") 'exwm-workspace-switch)

  (dotimes (i 10)
    (exwm-input-set-key (kbd (format "s-%d" i))
                        `(lambda ()
                           (interactive)
                           (exwm-workspace-switch-create ,i))))

  ;; buffer and window management
  (exwm-input-set-key (kbd "s-<tab>") 'next-buffer)

  (defvar exwm-last-workspace-index 0)
  (defun exwm-last-workspace ()
    (interactive)
    (let ((temp exwm-workspace-current-index))
      (exwm-workspace-switch exwm-last-workspace-index)
      (setq exwm-last-workspace-index temp)))

  (exwm-input-set-key (kbd "s-n") 'ivy-switch-buffer)
  (exwm-input-set-key (kbd "s-o") 'switch-window)
  (exwm-input-set-key (kbd "s-\\") 'exwm-last-workspace)

  (exwm-input-set-key (kbd "s-b") 'banish-rat)

  ;; run command
  (exwm-input-set-key (kbd "s-c") (lambda ()
                                    (interactive)
                                    (start-process "" nil "st")))
  (exwm-input-set-key (kbd "s-q") (lambda ()
                                    (interactive)
                                    (start-process "" nil "firefox-esr")))
  (exwm-input-set-key (kbd "s-<f2>") (lambda ()
                                       (interactive)
                                       (start-process "" nil "lock")))
  (exwm-input-set-key (kbd "s-p") (lambda (command)
                                    (interactive (list (read-shell-command "$ ")))
                                    (start-process-shell-command command nil command)))
  ;; Volume
  (exwm-input-set-key (kbd "s-<f10>")
                      (lambda ()
                        (interactive)
                        (adjust-volume "Speaker" "+")))

  (exwm-input-set-key (kbd "s-<f9>")
                      (lambda ()
                        (interactive)
                        (adjust-volume "Speaker" "-")))

  (exwm-input-set-key (kbd "s-<f8>")
                      (lambda ()
                        (interactive)
                        (adjust-volume "Speaker" "toggle")))

  (exwm-input-set-key (kbd "C-s-<f10>")
                      (lambda ()
                        (interactive)
                        (adjust-volume "Headphone" "+")))

  (exwm-input-set-key (kbd "C-s-<f9>")
                      (lambda ()
                        (interactive)
                        (adjust-volume "Headphone" "-")))

  (exwm-input-set-key (kbd "C-s-<f8>")
                      (lambda ()
                        (interactive)
                        (adjust-volume "Headphone" "toggle")))

  (exwm-input-set-key (kbd "s-<f7>") (lambda ()
                                       (interactive)
                                       (shell-command "$HOME/bin/backlight_up.sh")
                                       (message "Backlight up.")))

  (exwm-input-set-key (kbd "s-<f6>") (lambda ()
                                       (interactive)
                                       (shell-command "$HOME/bin/backlight_down.sh")
                                       (message "Backlight down.")))

  ;; -------------------------------------------------------------------
  ;; RandR

  (require 'exwm-randr)
  (exwm-randr-enable)

  (setq exwm-randr-workspace-monitor-plist
        '(1 "HDMI-1" 0 "eDP-1"))

  (exwm-enable))

;; -----------------------------------------------------------------------------
;; EXWM-edit

(use-package exwm-edit
  :ensure t
  :config
  (add-hook 'exwm-edit-compose-hook (lambda ()
                                      (text-mode))))