#+property: header-args :lexical t :tangle yes :comments yes :results silent :shebang ";; -*- lexical-binding: t -*-" :tangle-mode (identity #o644)
#+auto_tangle: t

* Packages
*** Use package
    #+begin_src emacs-lisp
    (unless (package-installed-p 'use-package)
      (package-refresh-contents)
      (package-install 'use-package))
    (require 'use-package)
    #+end_src
*** ELPA Keyring
    #+begin_src emacs-lisp
    (use-package gnu-elpa-keyring-update :ensure t)
    #+end_src
*** Loading .el newer than .elc files, and eln stuff
    #+begin_src emacs-lisp
      (setq load-prefer-newer t)
      (setq comp-async-report-warnings-errors nil
            warning-suppress-types '((comp)))
    #+end_src
* Initialisation
*** Portability macros
    #+begin_src emacs-lisp
    (defmacro jao-syscase (clauses)
      (let ((cls (assoc system-type clauses)))
        (when cls `(progn ,@(cdr cls)))))

    (defmacro jao-d-l (darw linux)
      `(jao-syscase ((darwin ,darw) (gnu/linux ,linux))))

    (defmacro jao-when-darwin (&rest body)
      `(jao-syscase ((darwin ,@body))))

    (defmacro jao-when-linux (&rest body)
      `(jao-syscase ((gnu/linux ,@body))))
    #+end_src
*** Paths
    #+begin_src emacs-lisp
      (defvar jao-local-lisp-dir "~/lib/elisp"
        "Directory for external elisp libraries and repos")

      (defvar jao-data-dir (expand-file-name "data" jao-emacs-dir)
        "Directory containing static data, such as images.")

      (defun jao-data-file (file) (expand-file-name file jao-data-dir))

      (defvar jao-org-dir (expand-file-name "~/org"))

      (defvar jao-sink-dir
        (file-name-as-directory (expand-file-name "~/doc/sink"))
        "Directory used for downloads and such.")

      (defvar jao-site-dir (expand-file-name "site" jao-emacs-dir))
      (defun jao-site-el (basename &optional gpg)
        (expand-file-name (concat basename ".el" (when gpg ".gpg")) jao-site-dir))

      (defun jao-load-site-el (basename &optional gpg)
        (let ((lf (jao-site-el basename gpg)))
          (if (file-exists-p lf)
              (load lf)
            (message "Attempted to load non existing %s" lf))))

      (defun jao-exec-path (file)
        (let ((fn (expand-file-name file)))
          (add-to-list 'exec-path fn nil)
          (setenv "PATH" (concat fn ":" (getenv "PATH")))))

      (defun jao-load-path (subdir)
        "Add to load path a subdir of `jao-local-lisp-dir'"
        (let ((path (expand-file-name subdir jao-local-lisp-dir)))
          (when (file-directory-p path) (add-to-list 'load-path path))))
    #+end_src
*** Load and info path initialisation
    #+begin_src emacs-lisp
      (add-to-list 'load-path jao-site-dir)
      (add-to-list 'load-path jao-local-lisp-dir)
      (add-to-list 'load-path "/usr/local/share/emacs/site-lisp/")

      (let ((libd (expand-file-name "lib" jao-emacs-dir)))
        (add-to-list 'load-path libd)
        (dolist (f (directory-files libd t "^[^.]+$"))
          (when (file-directory-p f) (add-to-list 'load-path f))))

      (defvar jao-info-dir
        (expand-file-name (jao-d-l "~/.emacs.d/info" "~/doc/info")))
      (require 'info)
      (add-to-list 'Info-directory-list jao-info-dir)
    #+end_src
*** Custom location of custom.el and co.
    #+begin_src emacs-lisp
      (setq custom-file (jao-site-el "custom"))
      ;; (load custom-file)
      (setq custom-unlispify-tag-names nil)
      (setq custom-buffer-done-kill t)
      (setq custom-raised-buttons nil)
    #+end_src
*** Preamble (pre.el)
    #+begin_src emacs-lisp
    (jao-load-site-el "pre")
    #+end_src
*** Session and history
    #+BEGIN_SRC emacs-lisp
      (setq backup-directory-alist (quote (("." . "~/.emacs.d/backups"))))
      (setq delete-old-versions t
            kept-new-versions 3
            kept-old-versions 2)

      (require 'saveplace)
      (setq save-place-file (expand-file-name "~/.emacs.d/cache/places"))
      (save-place-mode 1)

      (setq recentf-save-file (expand-file-name "~/.emacs.d/cache/recentf")
            recentf-max-saved-items 2000
            recentf-exclude '("/home/jao/\\.emacs\\.d/elpa.*/.*"
                              ".*/.git/COMMIT_EDITMSG"))
      (require 'recentf)
      (recentf-mode 1)

      ;; Command history
      (setq savehist-file (expand-file-name "~/.emacs.d/cache/history"))
      (require 'savehist)
      (savehist-mode t)
      (setq savehist-additional-variables
            '(kill-ring search-ring regexp-search-ring)
            savehist-ignored-variables
            '(ido-file-history))
    #+END_SRC
*** yes/no, bell, startup message
    #+BEGIN_SRC emacs-lisp
      ;;; change yes/no for y/n
      (if (version< emacs-version "28")
          (fset 'yes-or-no-p 'y-or-n-p)
        (setq use-short-answers t))
      (setq inhibit-startup-message t)
      (setq visible-bell t)
    #+END_SRC
*** Server
    #+begin_src emacs-lisp
      (setenv "EDITOR" "emacsclient")
      (when (and window-system (not (daemonp))) (server-start))
    #+end_src
* System utilities
*** Tramp
    #+begin_src emacs-lisp
      (setq tramp-mode nil)
    #+end_src
*** Sleep/awake
    #+begin_src emacs-lisp
      (use-package jao-sleep)
      (jao-sleep-dbus-register)
    #+end_src
*** Process runners
    #+begin_src emacs-lisp
      (defun jao-exec-string (fmt &rest args)
        (string-trim (shell-command-to-string (apply 'format fmt args))))

      (defun jao-exec (command)
        (interactive
         (list (read-shell-command "$ "
                                   (if current-prefix-arg
                                       (cons (concat " " (buffer-file-name)) 0)
                                     ""))))
        (start-process-shell-command command nil command))

      (defmacro jao-def-exec (name &rest args)
        `(defun ,name (&rest other-args)
           (interactive)
           (start-process-shell-command
            ,(car args)
            "* jao-exec - console *"
            (string-join (append (list ,@args) other-args) " "))))
    #+end_src
*** App launcher
    #+begin_src emacs-lisp
      (jao-load-path "app-launcher")
      (use-package app-launcher
        :bind (("s-r" . app-launcher-run-app)
               ("H-s-r" . app-launcher-run-app)))
    #+end_src
*** Brightness control
    #+begin_src emacs-lisp
      (jao-def-exec jao-bright-set-up "brightnessctl" "-q" "s" "5%+")
      (jao-def-exec jao-bright-set-down "brightnessctl" "-q" "s" "5%-")

      (defun jao-bright-show ()
        (interactive)
        (message "%s" (thread-first (jao-exec-string "brightnessctl")
                        (split-string "\n")
                        (cadr)
                        (string-trim))))

      (defun jao-bright-up ()
        (interactive)
        (jao-exec-string "brightnessctl -q s 5%%+")
        (jao-bright-show))

      (defun jao-bright-down ()
        (interactive)
        (jao-exec-string "brightnessctl -q s 5%%-")
        (jao-bright-show))
     #+end_src
*** Keyboard
    #+begin_src emacs-lisp
      (use-package repeat
        :config (setq repeat-echo-function #'repeat-echo-mode-line))
      (when (> emacs-major-version 27) (repeat-mode))

      (defun jao-kb-toggle (&optional lyt)
        (interactive)
        (shell-command-to-string (or lyt
                                     (if (jao-kb-toggled-p)
                                         "setxkbmap us"
                                       "setxkbmap us -variant intl"))))

      (defun jao-kb-toggled-p ()
        (not (string-empty-p
              (shell-command-to-string "setxkbmap -query|grep variant"))))

      (set-keyboard-coding-system 'latin-1)
      (set-language-environment "UTF-8")
      ;; must be set after current-language-environment
      (customize-set-variable 'default-input-method "catalan-prefix")

      (defun jao--set-kb-system (frame)
        (select-frame frame)
        (set-keyboard-coding-system 'latin-1)
        t)
      (add-to-list 'after-make-frame-functions 'jao--set-kb-system)

      (setq echo-keystrokes 1
            suggest-key-bindings nil)
    #+end_src
*** Transient
    #+begin_src emacs-lisp
      (use-package transient
        :init (setq transient-show-popup 2.0)
        :demand t
        :config
        (transient-bind-q-to-quit))

      (defmacro jao-transient-major-mode (mode &rest suffix)
        (declare (indent defun))
        (let ((mode (intern (format "%s-mode" mode)))
              (mmap (intern (format "%s-mode-map" mode)))
              (name (intern (format "jao-transient-%s" mode))))
          `(progn
             (transient-define-prefix ,name ()
               ,(format "Transient ops for %s" mode)
               [,(format "Operations for %s" mode) :if-derived ',mode ,@suffix])
             (define-key ,mmap (kbd "s-SPC") #',name))))

      (defmacro jao-transient-major-mode+1 (mode suffix)
        (declare (indent defun))
        (let ((name (intern (format "jao-transient-%s" mode))))
          (if (fboundp name)
              `(transient-append-suffix ',name '(0 -1) ,suffix)
            `(jao-transient-major-mode ,mode ,suffix))))

      (defmacro jao-transient-major-mode+ (mode &rest suffixes)
        (declare (indent defun))
        `(progn ,@(mapcar (lambda (s) `(jao-transient-major-mode+1 ,mode ,s))
                          suffixes)))

    #+end_src
* Crypto
*** PGP, EPG, passwords
    #+begin_src emacs-lisp
      (setq epg-pinentry-mode 'loopback)
      (setq auth-source-debug nil)

      (require 'auth-source)
      (add-to-list 'auth-source-protocols '(local "local"))
      (setq auth-sources '("~/.emacs.d/authinfo.gpg" "~/.netrc"))

      (use-package epa-file
        :init (setq epa-file-cache-passphrase-for-symmetric-encryption t)
        :config (epa-file-enable))
      (require 'epa-file)

      (defun jao--get-user/password (h)
        (let ((item (car (auth-source-search :type 'netrc :host h :max 1))))
          (when item
            (let ((user (plist-get item :user))
                  (pwd (plist-get item :secret)))
              (list user (when pwd (funcall pwd)))))))
    #+end_src
*** Pinentry
    #+begin_src emacs-lisp
      (use-package pinentry :ensure t)
      (pinentry-start)
    #+end_src
* Fonts and colour themes
*** Transparency
    #+begin_src emacs-lisp
      (defvar jao-frames-default-alpha (if (eq window-system 'pgtk) 100 90))
      (defvar jao-transparent-p t)

      (defun jao-sway-set-transparency (level)
        (when jao-sway-enabled-p
          (let ((alpha (/ level 100.0)))
            (jao-swaymsg (format "[app_id=emacs] opacity %s" alpha)))))

      (defun jao-toggle-transparency (&optional all)
        (interactive "P")
        (setq jao-transparent-p (not jao-transparent-p))
        (cond (jao-sway-enabled-p
               (jao-sway-set-transparency (if jao-transparent-p 90 100)))
              (all (let* ((trans (/= jao-frames-default-alpha 100))
                          (new-alpha (if trans 100 jao-frames-default-alpha))
                          (a `((alpha . (,new-alpha ,new-alpha)))))
                     (modify-all-frames-parameters a)))
              ((/= (or (cadr (frame-parameter nil 'alpha)) 100) 100)
               (set-frame-parameter nil 'alpha '(100 100)))
              (t (set-frame-parameter nil 'alpha `(,jao-frames-default-alpha
                                                   ,jao-frames-default-alpha)))))

      (defun jao-transparent-p ()
        (if jao-sway-enabled-p
            jao-transparent-p
          (/= (or (cadr (frame-parameter nil 'alpha)) 100) 100)))

      (defun jao-set-transparency (level)
        (interactive "nOpacity (0-100): ")
        (let ((level (or level jao-frames-default-alpha)))
          (setq jao-transparent-p (< level 100))
          (if jao-sway-enabled-p
              (jao-sway-set-transparency level)
            (set-frame-parameter nil 'alpha (list level level)))))
    #+end_src
*** Widgets
    #+begin_src emacs-lisp
      (setq widget-image-enable nil
            widget-link-prefix ""
            widget-link-suffix "↗"
            widget-button-prefix " "
            widget-button-suffix " "
            widget-push-button-prefix ""
            widget-push-button-suffix "")
    #+end_src
*** Fonts
***** Unicode fonts
      See [[https://emacs.stackexchange.com/questions/251/line-height-with-unicode-characters/5386#5386][fonts - Line height with unicode characters]] for a good
      discussion.
      #+begin_src emacs-lisp
        (defun jao--set-fontsets (f)
          (set-fontset-font t 64257 "Quivira" f)
          (set-fontset-font t 'egyptian "Noto Sans Egyptian Hieroglyphs" f)
          (set-fontset-font t 'hangul "NanumGothicCoding" f)
          (set-fontset-font t 'unicode (face-attribute 'default :family) f)
          (set-fontset-font t 'unicode-bmp (face-attribute 'default :family) f)
          (set-fontset-font t 'symbol "Symbola-10" f)
          (set-fontset-font t 'greek "GFS Didot" f)
          (set-fontset-font t 'mathematical "FreeSerif" f)
          (set-fontset-font t 'emoji "Noto Color Emoji" f)
          ;; boxes
          (set-fontset-font t '(9472 . 9599) "Source Code Pro" f)
          ;; variation selector-16
          (set-fontset-font t 65039 "BabelStone Modern-1" f))

        (jao--set-fontsets nil)
        (add-to-list 'after-make-frame-functions 'jao--set-fontsets)
      #+end_src
***** nobreak char display
      #+begin_src emacs-lisp
        ;; (setq nobreak-char-display nil)
      #+end_src
***** list-fonts-display
      #+begin_src emacs-lisp
        (defun list-fonts-display (&optional matching)
          "Display a list of font-families available via font-config, in a new buffer.
           If the optional argument MATCHING is non-nil, only
           font families matching that regexp are displayed;
           interactively, a prefix argument will prompt for the
           regexp.  The name of each font family is displayed
           using that family, as well as in the default font (to
           handle the case where a font cannot be used to display
           its own name)."
          (interactive
           (list
            (and current-prefix-arg
                 (read-string "Display font families matching regexp: "))))
          (let (families)
            (with-temp-buffer
              (shell-command "fc-list : family" t)
              (goto-char (point-min))
              (while (not (eobp))
                (let ((fam (buffer-substring (line-beginning-position)
                                             (line-end-position))))
                  (when (or (null matching) (string-match matching fam))
                    (push fam families)))
                (forward-line)))
            (setq families
                  (sort families
                        (lambda (x y) (string-lessp (downcase x) (downcase y)))))
            (let ((buf (get-buffer-create "*Font Families*")))
              (with-current-buffer buf
                (erase-buffer)
                (dolist (family families)
                  ;; We need to pick one of the comma-separated names to
                  ;; actually use the font; choose the longest one because some
                  ;; fonts have ambiguous general names as well as specific
                  ;; ones.
                  (let ((family-name
                         (car (sort (split-string family ",")
                                    (lambda (x y) (> (length x) (length y))))))
                        (nice-family (replace-regexp-in-string "," ", " family)))
                    (insert (concat (propertize nice-family
                                                'face (list :family family-name))
                                    " (" nice-family ")"))
                    (newline)))
                (goto-char (point-min)))
              (display-buffer buf))))
      #+end_src
*** Themes
    #+begin_src emacs-lisp
      (defun jao-colors-scheme-dark-p ()
        (equal "dark" (getenv "JAO_COLOR_SCHEME")))

      (setq custom-theme-directory
            (expand-file-name "lib/themes" jao-emacs-dir))

      (defvar jao-default-font "Hack-9")  ;;  "Fira Code-9"

      (require 'jao-themes)

      (defun jao-themes-setup ()
        (let ((dark (jao-colors-scheme-dark-p)))
          (load-theme (if dark 'jao-dark 'jao-light) t)))

      (when (and window-system (not (eq window-system 'pgtk)))
        (jao-themes-setup))

      (global-font-lock-mode 1)
    #+end_src
* Help system
*** Help buffers
    #+begin_src emacs-lisp
      (setq help-window-select t
            help-link-key-to-documentation t)
    #+end_src
*** eldoc
    #+begin_src emacs-lisp
      (use-package eldoc
        :init (setq eldoc-mode-line-string nil
                    eldoc-echo-area-use-multiline-p t
                    eldoc-echo-area-prefer-doc-buffer nil
                    eldoc-display-functions '(eldoc-display-in-echo-area))
        :config (global-eldoc-mode 1)
        :diminish ((eldoc-mode . "")))
   #+end_src
*** Bookmarks
    #+begin_src emacs-lisp
    (setq bookmark-default-file "~/.emacs.d/emacs.bmk"
          bookmark-set-fringe-mark nil)

    (use-package bookmark-view
      :ensure t
      :bind (("C-c v" . bookmark-view)
             ("C-c B" . bookmark-set)))

    #+end_src
*** Man pages
    #+begin_src emacs-lisp
      (setq Man-notify-method 'aggressive) ;; pushy - same window
    #+end_src
*** Recoll
    #+begin_src emacs-lisp
      (use-package jao-recoll)
    #+end_src
* Window manager helpers
*** exwm
    To start emacs in an exwm session we use the flag ~-f
    jao-exwm-enable~, which calls the function below enabling it.  This
    function, in turn, loads exwm's configuration from [[./exwm.org][exwm.org]].
    #+begin_src emacs-lisp
      (defvar jao-exwm-enabled-p nil)
      (defun jao-exwm-enable ()
        (jao-load-org "exwm.org")
        (setq jao-exwm-enabled-p t)
        (display-time-mode -1)
        (exwm-enable)
        (jao-trisect t))
    #+end_src
*** sway
    When starting emacs inside a sway session, we use ~-f
    jao-sway-enable~ and don't load any separate configuration file.

    #+begin_src emacs-lisp
      (defun jao-swaymsg (msg)
        (shell-command (format "swaymsg '%s' >/dev/null" msg)))

      (defmacro jao-def-swaymsg (name msg)
        `(defun ,(intern (format "jao-sway-%s" name)) ()
           (interactive)
           (jao-swaymsg ,msg)))
      (jao-def-swaymsg firefox "[app_id=firefox] focus")

      (defvar jao-sway-enabled-p nil)

      (defun jao-sway-set-wallpaper (f)
        (jao-swaymsg (format "output * bg %s fill" f))
        (make-symbolic-link f "~/.wallpaper.sway" t))

      (defun jao-sway-run-or-focus (cmd &optional ws)
        (if (not (string-blank-p (shell-command-to-string (format "pidof %s" cmd))))
            (jao-swaymsg (format "[app_id=%s] focus" cmd))
          (jao-swaymsg (format "workspace %s" (or ws 2)))
          (start-process-shell-command cmd nil cmd)))

      (defun jao-sway-enable ()
        (setq jao-sway-enabled-p t)
        (setq jao-browse-doc-use-emacs-p t)
        (setq jao-minibuffer-right-margin 1)
        (jao-toggle-inactive-mode-line t)
        (jao-trisect)
        (jao-set-transparency 92)
        (jao-themes-setup)
        (message "Welcome to sway"))
    #+end_src
*** Wallpaper
    #+begin_src emacs-lisp
      (defvar jao-wallpaper-dir "~/.wallpapers/")

      (defvar jao-wallpaper-random-candidates
        '("wallpaper.jpg" "wallpaper2.jpg"))

      (defvar jao-wallpaper-random-candidates-light
        '("wallpaper.jpg" "wallpaper2.jpg"))

      (defvar jao-wallpaper-random-wake t
        "Set to t for getting a new wallpaper on awaking from sleep")

      (defun jao-set-wallpaper (&optional path)
        (interactive)
        (let ((current (format "~/.wallpaper.%s"
                               (if (jao-colors-scheme-dark-p) "dark" "light"))))
          (when-let ((f (or path
                            (read-file-name "Image: "
                                            jao-wallpaper-dir
                                            (file-symlink-p current)
                                            t))))
            (make-symbolic-link (expand-file-name f) current t)
            (if jao-sway-enabled-p
                (jao-sway-set-wallpaper (expand-file-name f))
              (shell-command (format "xwallpaper --zoom %s" f))))))

      (defun jao-set-random-wallpaper ()
        (interactive)
        (when jao-wallpaper-random-wake
          (let* ((ws (if (jao-colors-scheme-dark-p)
                         jao-wallpaper-random-candidates
                       jao-wallpaper-random-candidates-light))
                 (f (seq-random-elt ws)))
            (jao-set-wallpaper (expand-file-name f jao-wallpaper-dir))
            (message "%s" f))))

      (add-to-list 'jao-sleep-awake-functions #'jao-set-random-wallpaper)
    #+end_src
*** Screensaver and lock
    #+begin_src emacs-lisp
      (defun jao-screensaver-enabled ()
        (string= (jao-exec-string "xdg-screensaver status") "enabled"))

      (defun jao-screensaver-toggle ()
        (interactive)
        (let ((wid (jao-exec-string "xdotool getwindowfocus")))
          (if (jao-screensaver-enabled)
              (jao-exec-string "xdg-screensaver suspend %s" wid)
            (jao-exec-string "xdg-screensaver resume %s" wid))
          (jao-notify (format "Using '%s'"
                              (jao-exec-string "xdotool getwindowname %s" wid))
                      (format "Screensaver %s"
                              (jao-exec-string "xdg-screensaver status")))))

      (jao-def-exec jao-xlock-screen "xdg-screensaver" "activate")
      (jao-def-exec jao-suspend "sudo" "/usr/sbin/pm-suspend")

      (defun jao-lock-screen ()
        (interactive)
        (if jao-sway-enabled-p
            (shell-command "swaylock -i ~/.lockimage")
          (jao-xlock-screen)))

      (transient-define-prefix jao-transient-sleep ()
        ["Sleep"
         ("l" "lock screen" jao-lock-screen)
         ("z" "sleep" jao-suspend)
         ("u" "enable/disable screensaver" jao-screensaver-toggle)])

    #+end_src
*** X clipboard
    #+BEGIN_SRC emacs-lisp
      (setq select-enable-clipboard t
            select-enable-primary t
            selection-timeout 100)
    #+END_SRC
* Mode line and minibuffer
*** Minibuffer
    #+begin_src emacs-lisp
      (use-package jao-minibuffer
        :init
        (if (jao-colors-scheme-dark-p)
            (setq jao-minibuffer-active-buffer-line-color "azure4"
                  jao-minibuffer-inactive-buffer-line-color "grey25")
          (setq jao-minibuffer-active-buffer-line-color "burlywood3"
                jao-minibuffer-inactive-buffer-line-color "grey65"))
        :commands (jao-minibuffer-add-variable
		   jao-minibuffer-refresh
		   jao-minibuffer-add-mode-line))

      (setq enable-recursive-minibuffers t)
      (require 'mb-depth)
      (minibuffer-depth-indicate-mode 1)

      (when window-system
        (add-hook 'after-init-hook
                  (lambda ()
                    (jao-toggle-inactive-mode-line t)
                    ;; (jao-minibuffer-add-mode-line 90)
                    )))
    #+end_src
*** Time display
    #+BEGIN_SRC emacs-lisp
      (setq display-time-world-list
            '(("Europe/Paris" "Barcelona")
              ("America/Los_Angeles" "Los Angeles")
              ("America/New_York" "New York")
              ("Europe/London" "London")
              ("Asia/Calcutta" "Bangalore")
              ("Asia/Tokyo" "Tokyo")))

      (defun jao-time--pdt-hour ()
        (jao-time-at-zone "%H" "America/Los_Angeles"))

      (defun jao-time--chicago-hour ()
        (jao-time-at-zone "%H" "America/Chicago"))

      (defun jao-time-at-zone (format zone)
        (set-time-zone-rule zone)
        (prog1 (format-time-string format)
          (set-time-zone-rule nil)))

      (defun jao-time-echo-la-time ()
        (interactive)
        (message (jao-time-at-zone "LA %H:%M" "America/Los_Angeles")))

      (defun jao-time-echo-times ()
        (interactive)
        (let ((msg (format "%s (%s)"
                           (format-time-string "%a, %e %B - %H:%M")
                           (jao-time-at-zone "%H:%M" "America/Los_Angeles"))))
          (jao-notify msg "" (jao-data-file "clock-world-icon.png"))))

      (defun jao-time-to-epoch (&optional s)
        (interactive)
        (let ((s (or s (read-string "Time string: " (thing-at-point 'string)))))
          (message "%s = %s"
                   s
                   (round (* 1000 (time-to-seconds (parse-time-string s)))))))

      (defun jao-epoch-to-time (&optional v)
        (interactive)
        (let ((v (or v (read-number "Milliseconds: " (thing-at-point 'number)))))
          (message "%s = %s" v
                   (format-time-string "%Y-%m-%d %H:%M:%S"
                                       (seconds-to-time (/ v 1000.0))))))
    #+END_SRC
*** Mode line format
    #+begin_src emacs-lisp
      (setq line-number-display-limit-width 250
            display-time-string-forms '(24-hours ":" minutes))
      (display-time-mode -1)

      (setq mode-line-position-column-format '(" %c")
            mode-line-position-line-format '(" %l,%c"))
      (setq mode-line-percent-position
            '(" %l" (:eval (format "/%d" (line-number-at-pos (point-max))))))
      (line-number-mode -1)
      (column-number-mode 1)
    #+end_src
*** Mode line toggle
    #+begin_src emacs-lisp
      (defun jao-toggle--face-height (face &optional all)
        (let* ((h (face-attribute face :height (window-frame)))
               (nh (if (eq 'unspecified h) 1 'unspecified)))
          (set-face-attribute face (when (not all) (window-frame)) :height nh)))

      (defun jao-toggle-mode-line (&optional all)
        (interactive "P")
        (jao-toggle--face-height 'mode-line all))

      (defun jao-toggle-inactive-mode-line (&optional all)
        (interactive "P")
        (jao-toggle--face-height 'mode-line-inactive all))

      (defun jao-echo-mode-line ()
        (interactive)
        (message "%s" (format-mode-line mode-line-format)))

      (defun jao--hide-inactive-mode-line (frame)
        (set-face-attribute 'mode-line-inactive frame :height 1))

      (add-to-list 'after-make-frame-functions #'jao--hide-inactive-mode-line)

      (global-set-key (kbd "<home>") #'jao-toggle-inactive-mode-line)
      (global-set-key (kbd "<end>") #'jao-toggle-mode-line)
      (global-set-key (kbd "<insert>") #'jao-echo-mode-line)

    #+end_src
*** Diminish
    #+BEGIN_SRC emacs-lisp
      (use-package diminish :ensure t)
      (when (require 'use-package-diminish nil 'noerror)
        (eval-after-load "simple" '(diminish 'auto-fill-function " §"))
        (eval-after-load "autorevert" '(diminish 'auto-revert-mode "")))
    #+END_SRC
*** Battery
    #+begin_src emacs-lisp
      (use-package battery
        :init (setq battery-load-low 15
                    battery-load-critical 8
                    battery-mode-line-limit 40
                    battery-echo-area-format
                    "%L %r %B (%p%% load, remaining time %t)"
                    battery-mode-line-format " %b%p "))
      (display-battery-mode 1)
      ;; (setq global-mode-string
      ;;       (delq 'battery-mode-line-string global-mode-string))
      (with-eval-after-load "jao-minibuffer"
        (jao-minibuffer-add-variable 'battery-mode-line-string 80))
    #+end_src
* Notifications
*** alert
    #+BEGIN_SRC emacs-lisp
      (use-package alert
        :ensure t
        :init
        (setq alert-default-style 'message ;; 'libnotify
              alert-hide-all-notifications nil))
    #+END_SRC
*** jao-notify
    #+begin_src emacs-lisp
      (require 'jao-notify)
    #+end_src
*** tracking
    #+begin_src emacs-lisp
      (use-package tracking
        :demand t
        :init (setq tracking-position 'before-modes
                    tracking-frame-behavior nil
                    tracking-most-recent-first nil
                    tracking-max-mode-line-entries 10
                    tracking-sort-faces-first t
                    tracking-shorten-modes '())
        :config
        (setq erc-track-enable-keybindings nil)

        (defun jao-tracking-next-buffer ()
          (interactive)
          (tracking-next-buffer)
          (jao-tracking-update-minibuffer))

        :bind (("C-c C-SPC" . jao-tracking-next-buffer)))

      (use-package jao-tracking
        :demand t
        :init (setq jao-tracking-bkg
                    (if (jao-colors-scheme-dark-p) "grey20" "grey93")))
      #+end_src
* Calendar, diary, weather
*** Diary
    #+BEGIN_SRC emacs-lisp
      (setq diary-file (expand-file-name "diary" jao-org-dir)
            diary-display-function 'diary-fancy-display
            diary-mail-addr "jao@localhost"
            diary-comment-start ";;"
            diary-comment-end "")

      (add-hook 'diary-list-entries-hook 'diary-sort-entries t)
    #+END_SRC
*** Calendar
    #+begin_src emacs-lisp
      (setq appt-display-format nil)
      (appt-activate 1)
      (setq calendar-latitude 55.9533
            calendar-longitude -3.1883
            calendar-location-name "Edinburgh, Scotland"
            calendar-mark-diary-entries-flag t
            calendar-date-echo-text '(format "ISO date: %s"
                                             (calendar-iso-date-string
                                              (list month day year))))

      (setq calendar-holidays
            '((holiday-fixed 1 1 "New Year's Day")
              (holiday-fixed 4 1 "April Fools' Day")
              (holiday-float 5 0 2 "Mother's Day")
              (holiday-fixed 3 19 "Father's Day")
              (holiday-float 11 4 4 "Thanksgiving")
              (holiday-fixed 12 25 "Christmas")
              (holiday-chinese-new-year)
              (solar-equinoxes-solstices)
              (holiday-sexp calendar-daylight-savings-starts
                            (format "Daylight Saving Time Begins %s"
                                    (solar-time-string
                                     (/ calendar-daylight-savings-starts-time
                                        (float 60))
                                     calendar-standard-time-zone-name)))
              (holiday-sexp calendar-daylight-savings-ends
                            (format "Daylight Saving Time Ends %s"
                                    (solar-time-string
                                     (/ calendar-daylight-savings-ends-time
                                        (float 60))
                                     calendar-daylight-time-zone-name)))))

      (add-to-list 'display-buffer-alist
                   `(,(regexp-quote diary-fancy-buffer)
                     (display-buffer-at-bottom)
                     (window-parameters (mode-line-format . none))
                     (window-height . fit-window-to-buffer)))

      (defun jao-diary--select ()
        (switch-to-buffer diary-fancy-buffer))

      (add-hook 'diary-fancy-display-mode-hook #'jao-diary--select)
      (setq org-calendar-insert-diary-entry-key nil
            org-agenda-diary-file 'diary-file)

    #+end_src
*** Weather
***** winttr
      #+begin_src emacs-lisp
        (defun jao-weather (&optional wide)
          (interactive "P")
          (if (not wide)
              (message "%s"
                       (jao-exec-string "curl -s 'https://wttr.in/?format=%s'"
                                        "%l++%m++%C+%c+%t+%w++%p"))
            (jao-afio--goto-scratch)
            (if-let ((b (get-buffer "*wttr*")))
                (progn (pop-to-buffer b)
                       (term-send-string "clear;curl wttr.in\n"))
              (jao-exec-in-term "curl wttr.in" "*wttr*"))))
        (global-set-key (kbd "<f5>") #'jao-weather)
      #+end_src
*** Timers
    #+BEGIN_SRC emacs-lisp
    (put 'list-timers 'disabled nil)
    #+END_SRC
* Files, dired and scratch buffer
*** so-long
    #+begin_src emacs-lisp
      (setq large-file-warning-threshold (* 200 1024 1024))

      (use-package so-long
        :ensure t
        :diminish)
      (global-so-long-mode 1)
    #+end_src
*** Persistent scratch
    #+BEGIN_SRC emacs-lisp
      (use-package persistent-scratch
        :ensure t
        :config (persistent-scratch-setup-default))
    #+END_SRC
*** Automatically uncompress
  #+BEGIN_SRC emacs-lisp
    (require 'jka-compr)
    (auto-compression-mode 1)
  #+END_SRC
*** wgrep
    #+begin_src emacs-lisp
      (use-package wgrep :ensure t)
      (require 'wgrep)
    #+end_src
*** dired
    - [[https://www.masteringemacs.org/article/working-multiple-files-dired][Working with multiple files in dired - Mastering Emacs]]
    #+begin_src emacs-lisp
      (require 'dired)
      (require 'dired-x nil t)
      (put 'dired-find-alternate-file 'disabled nil)

      (setq dired-recursive-deletes 'top)
      (setq dired-recursive-copies 'top)
      (setq dired-listing-switches "-alhF --group-directories-first")
      (setq dired-free-space-args "-Ph")
      (setq ls-lisp-dirs-first t)
      (setq dired-dwim-target t)
      (setq wdired-create-parent-directories t)
      (setq dired-kill-when-opening-new-dired-buffer t)

      (use-package find-dired
        :init
        (setq find-ls-option '("-print0 | xargs -0 ls -ld" . "-ld")))

      (add-hook 'dired-mode-hook #'turn-on-gnus-dired-mode)
      (define-key dired-mode-map [(control meta ?m)] #'gnus-dired-attach)
      (define-key dired-mode-map (kbd "C-c C-r") #'wdired-change-to-wdired-mode)
      (global-set-key (kbd "C-c D") #'find-name-dired)

    #+END_SRC
***** Dired packages
      #+BEGIN_SRC emacs-lisp
        (use-package dired-git-info
          :ensure t
          :bind (:map dired-mode-map (")" . dired-git-info-mode)))
      #+END_SRC
* General editing
*** Executable scripts
    #+begin_src emacs-lisp
      (add-hook 'after-save-hook
                'executable-make-buffer-file-executable-if-script-p)
    #+end_src
*** Long lines
    [[https://200ok.ch/posts/2020-09-29_comprehensive_guide_on_handling_long_lines_in_emacs.html][Comprehensive guide on handling long lines in Emacs - 200ok]]
    #+begin_src emacs-lisp
      (when (version<= "27.1" emacs-version)
        (setq bidi-inhibit-bpa t))
    #+end_src
*** Spaces, tabs, kill
    #+begin_src emacs-lisp
      (setq kill-whole-line t)
      (setq-default indent-tabs-mode nil)
      (setq indent-tabs-width 4)
      (setq-default default-tab-width 8)
      (setq tab-always-indent t)
      (setq kill-read-only-ok t)
      (setq view-read-only nil)
    #+end_src
*** Whitespace
    #+BEGIN_SRC emacs-lisp
      (add-hook 'write-file-functions 'delete-trailing-whitespace)
      (setq-default indicate-empty-lines nil)
    #+END_SRC
*** Filling
    Some variables to control where fci mode will be or is being used
    #+BEGIN_SRC emacs-lisp
      (setq fill-column 78)
      (setq comment-auto-fill-only-comments nil)
      (add-hook 'prog-mode-hook #'display-fill-column-indicator-mode)
      (setq-default display-fill-column-indicator-column 80)
    #+END_SRC
*** Visible mode
    #+begin_src emacs-lisp
      (use-package visible-mode
        :bind (("s-v" . visible-mode)))
    #+end_src
*** Changes
    #+begin_src emacs-lisp
      (use-package goto-chg
        :ensure t
        :bind (("C-." . goto-last-change)
               ("C-," . goto-last-change-reverse)))
    #+end_src
*** Eval-and-replace
    #+BEGIN_SRC emacs-lisp
      (defun fc-eval-and-replace ()
        "Replace the preceding sexp with its value."
        (interactive)
        (backward-kill-sexp)
        (condition-case nil
            (prin1 (eval (read (current-kill 0)))
                   (current-buffer))
          (error (message "Invalid expression")
                 (insert (current-kill 0)))))

       (global-set-key "\C-ce" 'fc-eval-and-replace)
    #+END_SRC
*** Completion
    #+begin_src emacs-lisp
      (jao-load-org "completion")
    #+end_src
* Buffers
*** cursor and mark
    #+begin_src emacs-lisp
      (transient-mark-mode -1)
      (blink-cursor-mode -1)
      (setq cursor-in-non-selected-windows nil)
    #+end_src
*** uniquifiy
    #+begin_src emacs-lisp
      (require 'uniquify)
      (setq uniquify-buffer-name-style 'forward
            uniquify-trailing-separator-p t)
    #+end_src
*** autosave
    #+BEGIN_SRC emacs-lisp
    (setq auto-save-list-file-prefix "~/.emacs.d/auto-save-list/.saves-"
          auto-save-no-message t)
    #+END_SRC
*** autoinsert
    #+BEGIN_SRC emacs-lisp
      (use-package autoinsert
        :config
        (setq auto-insert-directory "~/.emacs.d/autoinsert/"
              auto-insert t
              auto-insert-quert t)
        (setf (alist-get 'html-mode auto-insert-alist nil t) nil))
      (add-hook 'find-file-hooks #'auto-insert)
    #+END_SRC
*** autorevert
    #+BEGIN_SRC emacs-lisp
      (setq auto-revert-check-vc-info nil)
      (setq auto-revert-verbose nil)
      (setq auto-revert-avoid-polling t)
      (setq auto-revert-mode-text "")
      (require 'autorevert)
      (global-auto-revert-mode 1)
    #+END_SRC
*** attached buffers
    #+begin_src emacs-lisp
      (defun jao-display-buffer-below-selected (buffer alist)
        (delete-other-windows-vertically)
        (display-buffer-below-selected buffer alist))

      (defun jao-attached-buffer-entry (name-rx height)
        `(,name-rx (display-buffer-reuse-window
                    jao-display-buffer-below-selected)
                   (window-height . ,(or height 25))))

      (defmacro jao-with-attached-buffer (name-rx height &rest body)
        `(let ((display-buffer-alist '(,(jao-attached-buffer-entry name-rx height))))
           ,@body))

      (defun jao-define-attached-buffer (name-rx &optional height)
        (add-to-list 'display-buffer-alist
                     (jao-attached-buffer-entry name-rx height)))

     #+end_src
*** images
    #+begin_src emacs-lisp
      (setq image-use-external-converter t)
      (setq widget-image-enable nil)
    #+end_src
*** same mode
    #+begin_src emacs-lisp
      (defun jao-buffer-same-mode (&optional mode pre-fn switch-fn)
        (interactive)
        (let* ((mode (or mode major-mode))
               (modes (if (symbolp mode) (list mode) mode))
               (pred `(lambda (b)
                        (let ((b (get-buffer (if (consp b) (car b) b))))
                          (member (buffer-local-value 'major-mode b)
                                  ',modes))))
               (buff (read-buffer "Buffer: " nil t pred)))
          (when pre-fn (funcall pre-fn))
          (if switch-fn (funcall switch-fn buff) (pop-to-buffer buff))))
      (global-set-key (kbd "C-c C-b") #'jao-buffer-same-mode)
    #+end_src
*** projects
    #+begin_src emacs-lisp
      (use-package project
        :bind (("C-x C-p" . project-prefix-map)))
    #+end_src
*** buffer quit function (the triple ESC)
    #+begin_src emacs-lisp
      (setq buffer-quit-function (lambda () t))
    #+end_src
* Windows
*** Scrolling
    #+begin_src emacs-lisp
      (setq scroll-preserve-screen-position 'always
            scroll-conservatively most-positive-fixnum
            scroll-margin 4
            scroll-step 2
            redisplay-skip-fontification-on-input t)

      (setq line-move-visual t)

    #+end_src
*** Splitting and switch
    #+begin_src emacs-lisp
      (setq split-height-threshold 80
            split-width-threshold 144)

      (setq switch-to-buffer-preserve-window-point nil
            switch-to-buffer-obey-display-actions t
            switch-to-prev-buffer-skip 'this) ;; don't switch to a
                                              ;; buffer visible in
                                              ;; same frame

      (global-set-key (kbd "C-x _") #'delete-other-windows-vertically)
    #+end_src
*** Transpose
    #+begin_src emacs-lisp
      (defun jao-transpose-windows (arg)
        "Transpose the buffers shown in two windows."
        (interactive "p")
        (let ((selector (if (>= arg 0) 'next-window 'previous-window)))
          (while (/= arg 0)
            (let ((this-win (window-buffer))
                  (next-win (window-buffer (funcall selector))))
              (set-window-buffer (selected-window) next-win)
              (set-window-buffer (funcall selector) this-win)
              (select-window (funcall selector)))
            (setq arg (if (> arg 0) (1- arg) (1+ arg))))))

      (defun jao-transpose-windows-prev ()
        (interactive)
        (jao-transpose-windows -1))

      (define-key ctl-x-4-map (kbd "t") #'jao-transpose-windows)
      (global-set-key (kbd "M-O") #'jao-transpose-windows)
      (global-set-key (kbd "M-P") #'jao-transpose-windows-prev)
    #+end_src
*** Window navigation
    #+begin_src emacs-lisp
      (defvar jao-first-window--from nil)

      (defun jao-first-window ()
        "Go to previous windows in frame, remembering where we were."
        (interactive)
        (let ((cb (current-buffer)))
          (if (eq (get-buffer-window cb) (select-window (frame-first-window)))
              (when jao-first-window--from (pop-to-buffer jao-first-window--from))
            (setq jao-first-window--from cb))))

      (defun jao-prev-window ()
        "Go to previous window."
        (interactive)
        (other-window -1))

      (defun jao--nth-window (n)
        (let ((jao-minibuffer-enabled-p nil)
              (ignore-window-parameters t))
          (select-window (frame-first-window))
          (other-window n))
        (jao-minibuffer-refresh))

      (defalias 'jao-other-window 'other-window)

      (global-set-key (kbd "s-a") #'jao-first-window)
      (global-set-key (kbd "H-s-a") #'jao-first-window)
      (global-set-key (kbd "C-x p") 'jao-prev-window)
      (global-set-key (kbd "M-o") #'other-window)
      (global-set-key (kbd "M-p") #'jao-prev-window)

      (global-set-key (kbd "C-c 0") #'jao-first-window)
      (dolist (n '(0 1 2 3 4 5 6 7 8))
        (global-set-key (format "\C-c%s" (1+ n))
                        (lambda () (interactive) (jao--nth-window n))))

    #+end_src
*** winner mode
    #+begin_src emacs-lisp
      (winner-mode 1)
    #+end_src
* Frames
*** Frame geometry
    #+begin_src emacs-lisp
      (setq frame-resize-pixelwise nil)

      ;;; modeline, toolbars and co.
      (modify-all-frames-parameters
       `((horizontal-scroll-bars . nil)
         (vertical-scroll-bars . nil)
         (scroll-bar-width . 11)
         (menu-bar . nil)
         (alpha . (,jao-frames-default-alpha ,jao-frames-default-alpha))
         (font . ,jao-default-font)))
    #+end_src
*** Frame layout, title, etc.
    #+BEGIN_SRC emacs-lisp
      (setq frame-title-format '("%b"))
      (use-package fringe)
      (fringe-mode)

      (menu-bar-mode (jao-d-l 1 -1))

      ;; (setting it to nil avoids mouse wrapping after other-frame)
      (setq focus-follows-mouse t)

      (use-package scroll-bar)
      (set-scroll-bar-mode nil)
      (use-package tool-bar)
      (tool-bar-mode -1)

      (defun jao-trisect (&optional force)
        (interactive)
        (let ((fw (frame-width)))
          (delete-other-windows)
          (cond ((or force (>= fw 240))
                 (let ((w (- (/ fw 3))))
                   (delete-other-windows)
                   (split-window-horizontally w)
                   (split-window-horizontally w)
                   (balance-windows)))
                ((> fw 162)
                 (split-window-horizontally)
                 (switch-to-buffer (other-buffer))))))

      (defun jao-bisect ()
        (interactive)
        (jao-trisect t)
        (next-window)
        (delete-window))
    #+END_SRC
*** afio
    #+begin_src emacs-lisp
      (use-package jao-afio)

      (defun jao-xmonad-goto-1 ()
        (shell-command "sendCommand 1"))

      (defun jao-afio--goto-scratch-1 ()
        (interactive)
        (jao-afio-goto-scratch t))

      (jao-afio-setup 'jao-afio--goto-scratch-1 t)

      (defun jao-current--frame-id ()
        (propertize (if (and jao-exwm-enabled-p
                             (not (bound-and-true-p jao-exwm--use-afio)))
                        (format "F%s" exwm-workspace-current-index)
                      (format "%s" (jao-afio-current-no)))
                    'face 'font-lock-warning-face))

      (add-hook 'jao-afio-switch-hook #'tracking-remove-visible-buffers)
      (jao-minibuffer-add-variable '(jao-current--frame-id) 100)
    #+end_src
* Writing and writing modes
*** Org mode
    #+begin_src emacs-lisp
      (jao-load-org "org")
    #+end_src
*** Blog
    #+begin_src emacs-lisp
      (jao-load-org "blog")
    #+end_src
*** Text-ish mode settings
    #+begin_src emacs-lisp
      ;;; SENTENCES separated by just one space
      (setq sentence-end "[.?!][]\"')]*\\($\\|\t\\| \\)[ \t\n]*")
      (setq sentence-end-double-space t)
      ;;; copy rectangle
      (defun kill-rectangle-save (start end)
        "Save the region-rectangle as the last killed one."
        (interactive "r")
        (require 'rect)           ; Make sure killed-rectangle is defvar'ed.
        (setq killed-rectangle (extract-rectangle start end))
        (message "Rectangle saved"))
      ;;; indent on yank
      (defvar jao-auto-indent-modes
        '(emacs-lisp-mode ;; clojure-mode
          scheme-mode objc-mode
          tuareg-mode c-mode c++-mode
          tcl-mode sql-mode
          perl-mode cperl-mode
          java-mode jde-mode
          LaTeX-mode TeX-mode))

      ;; (defadvice yank (after indent-region activate)
      ;;   (if (member major-mode jao-auto-indent-modes)
      ;;       (indent-region (region-beginning) (region-end) nil)))

      ;; text mode, autoinserts and write hooks
      ;;; misc
      (setq default-major-mode 'text-mode)

      (add-hook 'text-mode-hook 'turn-on-auto-fill)
      (add-hook 'write-file-functions 'copyright-update)
    #+end_src
*** Dictionaries
    #+BEGIN_SRC emacs-lisp
      (defun jao-word-definition-lookup ()
        "Look up the word under cursor in a browser."
        (interactive)
        (require 'thingatpt)
        (browse-url
         (concat "http://www.wordnik.com/words/"
                 ;; "http://www.answers.com/main/ntquery?s="
                 (thing-at-point 'word))))

      (use-package dictionary
        :init (setq dictionary-use-single-buffer t
                    dictionary-server "localhost")
        :commands (dictionary-search
                   dictionary-match-words
                   dictionary-lookup-definition
                   dictionary
                   dictionary-mouse-popup-matching-words
                   dictionary-popup-matching-words
                   dictionary-tooltip-mode
                   global-dictionary-tooltip-mode)
        :bind (("C-c d" . dictionary-search)
               ("C-c D" . jao-word-definition-lookup)))

      (setq ispell-personal-dictionary
            (expand-file-name "~/.emacs.d/ispell.dict"))

    #+END_SRC
*** Markdown
    #+BEGIN_SRC emacs-lisp
      (use-package markdown-mode
        :ensure t)

      (use-package markdown-toc
        :ensure t)

      (dolist (ext '("\\.md$" "\\.markdown$"))
        (add-to-list 'auto-mode-alist (cons ext 'markdown-mode)))
    #+END_SRC
*** TeX and LaTex
    #+BEGIN_SRC emacs-lisp
      (use-package tex-site
        :ensure auctex
        :init (progn (setq TeX-auto-save t)
                     (setq TeX-parse-self t)
                     (setq TeX-a4-paper t)
                     (setq TeX-auto-local ".tex-auto-local")
                     ;; Preferred view format: dvi, ps, pdf, pdfs
                     (setq TeX-view-format "pdf")
                     (setq-default TeX-master "../main") ; nil to ask
                     (setq TeX-view-program-selection
                           (jao-d-l
                            '((output-dvi "open")
                              (output-pdf "open")
                              (output-html "open"))
                            '(((output-dvi has-no-display-manager) "dvi2tty")
                              ((output-dvi style-pstricks) "dvips and gv")
                              (output-dvi "xdvi")
                              (output-pdf "xdg-open")
                              (output-html "xdg-open"))))
                     ;; to make RefTeX faster for large documents, try these:
                     (setq reftex-enable-partial-scans t)
                     (setq reftex-save-parse-info t)
                     (setq reftex-use-multiple-selection-buffers t)
                     ;; to integrate with AUCTeX
                     (setq reftex-plug-into-AUCTeX t)
                     (setq reftex-ref-style-default-list
                           '("Hyperref" "Varioref" "Fancyref"))
                     (add-hook 'LaTeX-mode-hook 'turn-on-reftex)
                     (setq LaTeX-command "latex -shell-escape")
                     (setq LaTeX-biblatex-use-Biber t)
                     (setq bibtex-dialect 'biblatex)
                     (jao-when-darwin
                      (jao-exec-path "/usr/local/texlive/2016/bin/x86_64-darwin"))))

      ;; (use-package ebib
      ;;  :ensure t
      ;;  :config (setq ebib-bibtex-dialect 'biblatex))

      ;; for M-x biblio-lookup
      ;; (use-package biblio :ensure t)
    #+END_SRC
* Browsing
*** Variables
    #+begin_src emacs-lisp
      (defvar jao-browse-doc-use-emacs-p t)
      (defvar jao-browse-url-function nil)
      (defvar jao-browse-url-external-function nil)
    #+end_src
*** URL around point
    #+begin_src emacs-lisp
      (defun jao-url-around-point (&optional current-url)
        (or (and (fboundp 'w3m-anchor) (w3m-anchor))
            (shr-url-at-point nil)
            (ffap-url-at-point)
            (thing-at-point 'url)
            (when current-url
              (or (and (fboundp 'w3m-anchor) (w3m-anchor))
                  (and (derived-mode-p 'eww-mode) (plist-get eww-data :url))))))

      (defun jao--url-prompt ()
        (let* ((def (jao-url-around-point t))
               (prompt (concat "URL" (if def (format " (%s): " def) ": "))))
          (read-string prompt nil nil def)))
    #+end_src
*** Downloads using wget
    #+BEGIN_SRC emacs-lisp
      (defun jao-wget--get-title (filename)
        (let ((fn (file-name-base filename)))
          (if (string-blank-p fn)
              (plist-get eww-data :title)
            (subst-char-in-string ?- ?  (capitalize fn)))))

      (defun jao-wget (url &optional user pwd)
        "Download URL using wget."
        (let* ((def (file-name-nondirectory url))
               (pmt (format "Save %s to: " url))
               (read-file-name-function nil)
               (dest (expand-file-name
                      (read-file-name pmt jao-sink-dir nil nil def)))
               (title (jao-wget--get-title dest))
               (src-url (jao-url-around-point t))
               (auth (when (and user pwd)
                       `(,(format "--http-user=%s" user)
                         ,(format "--http-password=%s" pwd)))))
          (switch-to-buffer-other-window (get-buffer-create "*downloads*"))
          (erase-buffer)
          (kill-new (format "[[doc:%s][%s]] (from [[%s][here]])"
                            (file-name-nondirectory dest)
                            (read-string "Title: " title)
                            (or src-url (file-name-directory url))))
          (apply 'make-term `("downloads" "wget" nil ,@auth "-O" ,dest ,url))))

      (defun jao-download (url &optional pws)
        "Download URL using wget"
        (interactive (list (jao--url-prompt)))
        (when url
          (let ((usr (and pws (read-string "Login name: ")))
                (pwd (and pws (read-passwd "Password: "))))
            (jao-wget url usr pwd))))

      (with-eval-after-load "embark"
        (define-key embark-url-map (kbd "d") #'jao-download))

    #+END_SRC
*** Video
    #+BEGIN_SRC emacs-lisp
      (defvar jao-video--url-rx
        (format "^https?://\\(?:www\\.\\)?%s/.+"
                (regexp-opt '("youtu.be"
                              "youtube.com"
                              "blip.tv"
                              "vimeo.com"
                              "infoq.com")
                            t)))

      (defun jao-video--url-p (url) (string-match-p jao-video--url-rx url))

      (defun jao--remote-run (url prg)
        (let ((args (format "%s %s" prg (shell-quote-argument url))))
          (start-process-shell-command prg nil args)))

      (defun jao--mpv (url &rest args) (jao--remote-run url "mpv"))
      (defun jao--vlc (url &rest args) (jao--remote-run url "vlc"))

      (defvar jao--video-player 'jao--mpv)

      (defun jao-view-video (url)
        "Tries to stream a video from the current or given URL"
        (interactive (list (jao--url-prompt)))
        (when url (funcall jao--video-player url)))

      (defun jao-maybe-view-video (url &rest _ignored)
        (interactive)
        (if (y-or-n-p "View video (y) or web page (n)? ")
            (jao-view-video url)
          (funcall jao-browse-url-function url)))

    #+END_SRC
*** Web browsers
    #+begin_src emacs-lisp
      (setq shr-use-fonts nil
            shr-use-colors nil)

      (defun jao-www--buffer-p (b)
        (with-current-buffer b
          (or (derived-mode-p 'w3m-mode 'eww-mode)
              (member (buffer-local-value 'exwm-class-name b) '("vlc" "mpv")))))

      ;; (jao-load-org "w3m")
      (jao-load-org "eww")
    #+end_src
*** Browse URL
    #+begin_src emacs-lisp
      (require 'browse-url)

      (setq browse-url-generic-program "~/bin/firehog")

      (defun jao-browse-with-external-browser (&rest url)
        "Browse with external hogging"
        (interactive "s")
        (let ((url (or (car url) (jao-url-around-point))))
          (if (not url)
              (message "No URL at point")
            (when (and jao-exwm-enabled-p (fboundp 'jao-exwm-firefox))
              (jao-exwm-firefox))
            (when (and jao-sway-enabled-p (fboundp 'jao-sway-firefox))
              (jao-sway-firefox))
            (browse-url-generic url))))
      (setq jao-browse-url-external-function 'jao-browse-with-external-browser)

      (defun jao--fln (url)
        (shell-quote-argument
         (if (string-match "^[^:]*:/*?\\(/?[^/].*\\)" url)
             (match-string-no-properties 1 url)
           url)))

      (defun jao--browse-doc (url search &optional no-add)
        (let* ((url (substring-no-properties url))
               (file (jao--fln url)))
          (when file
            (unless (file-exists-p file)
              (error "File %s does not exist" file))
            (jao-open-doc file))))

      (defun jao--make-file-rx (exts)
        (format "file:/?/?.+\\.%s$" (regexp-opt exts)))

      (defvar jao--see-exts
        (jao--make-file-rx '("jpg" "jpeg" "png" "mov" "wmv" "avi" "mp4")))

      (defvar jao--doc-exts
        (jao--make-file-rx '("ps" "ps.gz" "pdf" "dvi" "djvu" "chm")))

      (defvar jao-browse-url-wget-exts
        '("ps" "pdf" "dvi" "djvu" "zip" "gz" "tgz" "mp4" "mp3" "flv"))

      (defvar jao-browse-external-domains
        '("github.com" "gitlab.com" "slack.com" "meet.google.com"
          "twitter.com" "t.com" "linkedin.com" "bigml.com"))

      (defvar jao-browse--external-regexp
        (format "https?://.*%s\\(/.*\\)?"
                (regexp-opt jao-browse-external-domains)))

      (defun jao-wget--regexp ()
        (concat "^http[s]?://.+\\(\\."
          (mapconcat 'identity jao-browse-url-wget-exts "\\|\\.")
          "\\)\\'"))

      (defun jao--see (url &rest _r)
        (start-process-shell-command "see" nil (format "see %s" (jao--fln url))))

      (defun jao--find-file-other-window (url &rest _)
        (find-file-other-window (jao--fln url)))

      (use-package elpher :ensure t)

      (defun jao-elpher--browse (url &rest _) (elpher-go url))

      (setq browse-url-handlers
            `(("^\\(gemini\\|gopher\\)://.*" . jao-elpher--browse)
              (,jao--doc-exts . jao--browse-doc)
              (,jao--see-exts . jao--see)
              ("^file://?.+\\.html?$" . ,jao-browse-url-function)
              ("^file://?" . jao--find-file-other-window)
              (,jao-browse--external-regexp . ,jao-browse-url-external-function)
              ("^https?://.*\\.gotomeeting\\.com\\.*" . browse-url-chrome)
              (,(jao-wget--regexp) . jao-download)
              (jao-video--url-p . jao-maybe-view-video)
              ("." . ,jao-browse-url-function)))

      (when (< emacs-major-version 28)
        (setf (alist-get 'jao-video--url-p browse-url-handlers nil t) nil)
        (setq browse-url-browser-function browse-url-handlers))

    #+end_src
*** Subscribe rss using r2e
    #+begin_src emacs-lisp
      (autoload 'View-quit "view")

      (defun jao-rss--find-url ()
        (when (derived-mode-p 'w3m-mode 'eww-mode)
          (save-excursion
            (if (fboundp 'w3m-view-source) (w3m-view-source) (eww-view-source))
            (goto-char (point-min))
            (when (re-search-forward
                   "type=\"application/\\(?:atom\\|rss\\)\\+xml\" +" nil t)
              (let ((url (save-excursion
                           (when (re-search-forward
                                  "href=\"\\([^\n\"]+\\)\"" nil t)
                             (match-string-no-properties 1))))
                    (title (when (re-search-forward
                                  "\\(?:title=\"\\([^\n\"]+\\)\" +\\)" nil t)
                             (match-string-no-properties 1))))
                (if (fboundp 'w3m-view-mode) (w3m-view-source) (View-quit))
                (when url (cons url (or title ""))))))))

      (defun jao-rss2e-append (name url mbox)
        (with-current-buffer (find-file-noselect "~/.config/rss2email.cfg")
          (goto-char (point-max))
          (insert "[feed." name "]\nurl = " url)
          (insert "\nto = " mbox "+" name "@localhost")
          (insert "\nmaildir-mailbox = " mbox "\n\n")
          (save-buffer)))

      (defun jao-rss-subscribe (url)
        "Subscribe to a given RSS URL.  If URL not given, look for it."
        (interactive "sURL: ")
        (let* ((url (or url
                        (jao-url-around-point)
                        (jao-rss--find-url)
                        (read-string "Feed URL: ")))
               (url+title (if (consp url) url (list url)))
               (url (car url+title))
               (title (cdr url+title)))
          (if url
              (let ((url (if (string-match "^feed:" url) (substring url 5) url)))
                (when (y-or-n-p (format "Subscribe to <%s>? " url))
                  (let* ((name (read-string "Feed name: " title))
                         (cat (completing-read "Category: "
                                               (jao-list-mailboxes "feeds")
                                               nil t)))
                    (jao-rss2e-append name url cat)
                    (shell-command (format "r2e run %s" name)))))
            (message "No feeds found"))))
    #+end_src
* Email
  #+begin_src emacs-lisp
    (setq jao-afio-mail-function 'gnus)
    (jao-load-org "email")
  #+end_src
* PDFs
*** doc-view and pdf-tools
    #+begin_src emacs-lisp
      ;; this is an ugly hack: when jao-minibuffer is active,
      ;; somehow docview scrolling is not triggering a refresh,
      ;; specially for scroll down movements, so we advice the
      ;; scrolling functions to force a redisplay by going to
      ;; another window.
      (defun jao--refresh (&rest _rest)
          (let ((jao-minibuffer-enabled-p nil))
            (other-window 1) (other-window -1)))

      (use-package doc-view
        :init
        (setq doc-view-cache-directory "~/.emacs.d/cache/docview"
              doc-view-resolution 110
              doc-view-continuous t
              doc-view-conversion-refresh-interval 1)

        :config

        (dolist (f '(doc-view-scroll-up-or-next-page
                     doc-view-scroll-down-or-previous-page
                     doc-view-previous-line-or-previous-page
                     doc-view-next-line-or-next-page
                     image-forward-hscroll
                     image-backward-hscroll
                     image-scroll-down
                     image-scroll-up
                     image-eol
                     image-bol))
          (advice-add f :after #'jao--refresh))

        :bind (:map doc-view-mode-map
                    ("j" . doc-view-next-line-or-next-page)
                    ("J" . doc-view-scroll-up-or-next-page)
                    ("k" . doc-view-previous-line-or-previous-page)
                    ("K" . doc-view-scroll-down-or-previous-page)))

      (use-package jao-doc-view
        :config
        (dolist (f '(image-forward-hscroll
                     image-backward-hscroll
                     image-scroll-down
                     image-scroll-up
                     image-eol
                     image-bol))
          (advice-add f :after #'jao--refresh))

        :bind (:map doc-view-mode-map
                    ("b" . jao-doc-view-back)
                    ("B" . jao-doc-view-forward)
                    ("S" . jao-doc-view-save-session)
                    ("u" . jao-doc-view-visit-url)))

      (use-package pdf-tools
        :ensure t
        :demand t
        :init
        (add-hook 'after-init-hook
                  (lambda ()
                    (setq pdf-view-midnight-colors
                          (cons (frame-parameter nil 'foreground-color)
                                (frame-parameter nil 'background-color)))))
        :config
        (pdf-tools-install)

        (dolist (f '(pdf-view-scroll-up-or-next-page
                     pdf-view-scroll-down-or-previous-page
                     pdf-view-previous-line-or-previous-page
                     pdf-view-next-line-or-next-page))
          (advice-add f :after #'jao--refresh))

        :diminish ((pdf-view-midnight-minor-mode . ""))

        :bind (:map pdf-view-mode-map
                    (("C-c C-d" . pdf-view-midnight-minor-mode)
                     ("j" . pdf-view-next-line-or-next-page)
                     ("J" . pdf-view-scroll-up-or-next-page)
                     ("k" . pdf-view-previous-line-or-previous-page)
                     ("K" . pdf-view-scroll-down-or-previous-page))))

      (use-package saveplace-pdf-view
        :ensure t
        :demand t
        :after doc-view)
    #+end_src
*** open pdfs
    #+begin_src emacs-lisp
      (setq jao-open-doc-fun 'jao-find-or-open)

      (defun jao-find-or-open (file)
        (let* ((buffs (buffer-list))
               (b (catch 'done
                    (while buffs
                      (when (string-equal (buffer-file-name (car buffs)) file)
                        (throw 'done (car buffs)))
                      (setq buffs (cdr buffs))))))
          (jao-afio--goto-docs)
          (if b (pop-to-buffer b) (find-file file))))

      (defun jao-open-doc (&optional file)
        (interactive)
        (when-let (file (or file
                            (read-file-name "Document: "
                                            (concat jao-org-dir "/doc/"))))
          (funcall jao-open-doc-fun file)))

      (defun jao-afio-open-pdf (file page &optional height)
        (jao-open-doc file)
        (when page (jao-doc-view-goto-page page height)))

      (setq jao-org-open-pdf-fun #'jao-afio-open-pdf)
    #+end_src
*** transient
    #+begin_src emacs-lisp
      (defun jao-org-pdf-goto-org-linking ()
        (interactive)
        (jao-org-pdf-goto-org 4))

      (jao-transient-major-mode doc-view
        ["Notes"
         ("o" "notes file" jao-org-pdf-goto-org)
         ("O" "notes file, linking" jao-org-pdf-goto-org-linking)]
        ["Navigation"
         ("b" "back jump" jao-doc-view-back)
         ("B" "forward jump" jao-doc-view-back)
         ("u" "visit URL" jao-doc-view-visit-url)]
        ["Slices"
         ("cb" "bounding box" doc-view-set-slice-from-bounding-box)
         ("cm" "using mouse" doc-view-set-slice-using-mouse)]
        ["Session"
         ("s" "load session" jao-open-pdf-session)
         ("S" "save session" jao-doc-view-save-session)
         ("d" "visit cache directory" doc-view-dired-cache)])

      (jao-transient-major-mode pdf-view
        ["Notes"
         ("o" "notes file" jao-org-pdf-goto-org)
         ("O" "notes file, linking" jao-org-pdf-goto-org-linking)]
        ["Navigation"
         ("b" "back jump" pdf-history-backward)
         ("f" "forward jump" pdf-history-forward)]
        ["Session"
         ("s" "load session" jao-afio-open-pdf-session)
         ("S" "save session" jao-doc-view-save-session)])

      ;; (transient-get-suffix 'jao-transient-pdf-view '(0 -1))

  #+end_src
* Shells and terms
*** shell modes
    #+begin_src emacs-lisp
      (setq sh-basic-offset 2)
      ;; translates ANSI colors into text-properties, for eshell
      (autoload 'ansi-color-for-comint-mode-on "ansi-color" nil t)
      (add-hook 'shell-mode-hook 'ansi-color-for-comint-mode-on)
    #+end_src
*** vterm
    #+begin_src emacs-lisp
      (use-package vterm-toggle
        :ensure t
        :config
        (defun jao-vterm--toggle (cd)
          (interactive "P")
          (if cd (vterm-toggle-cd) (vterm-toggle)))
        :bind (("C-<f3>" . jao-vterm--toggle)))

      (use-package vterm
        :ensure t
        :config
        :custom ((vterm-kill-buffer-on-exit t)))

      (use-package eshell-vterm
          :ensure t
          :config (eshell-vterm-mode))

      (defun jao-exec-in-vterm (cmd bname)
        (if (string-blank-p (or cmd ""))
            (vterm)
          (let ((vterm-shell cmd)
                (vterm-kill-buffer-on-exit t)
                (buff (generate-new-buffer bname)))
            (switch-to-buffer buff)
            (vterm-mode))))

    #+end_src
*** term
    #+begin_src emacs-lisp
      (defvar-local jao-term--cmd nil)
      (defvar jao-use-vterm t)

      (defun jao-term--find (cmd)
        (seq-find (lambda (b)
                    (with-current-buffer b
                      (and (derived-mode-p 'term-mode 'vterm-mode)
                           (string= (or jao-term--cmd "") cmd))))
                  (buffer-list)))

      (defun jao-exec-in-term (cmd &optional name)
        (if jao-use-vterm
            (jao-exec-in-vterm cmd name)
          (ansi-term "bash" name)
          (set-process-sentinel (get-buffer-process (current-buffer))
                                (lambda (process event)
                                  (when (string= event "finished\n")
                                    (kill-buffer (process-buffer process)))))
          (term-send-string nil (concat cmd " ; exit\n"))))

      (defmacro jao-def-exec-in-term (name cmd &rest prelude)
        `(defun ,(intern (format "jao-term-%s" name)) ()
           (interactive)
           ,@prelude
           (if-let ((b (jao-term--find ,cmd)))
               (pop-to-buffer b)
             (jao-exec-in-term ,cmd ,(format "*%s*" name))
             (setq-local jao-term--cmd ,cmd))))

      (jao-def-exec-in-term "aptitude" "aptitude" (jao-afio--goto-scratch))
      (jao-def-exec-in-term "htop" "htop" (jao-afio--goto-scratch))
    #+end_src
*** eshell
***** Basic custom
      #+begin_src emacs-lisp
        (use-package eshell
          :init
          (setq eshell-directory-name "~/.emacs.d/eshell")
          (setq eshell-hist-ignoredups 'erase)
          :config
          (add-hook 'eshell-mode-hook
                    (lambda () (setq outline-regexp eshell-prompt-regexp))))
      #+end_src
***** Colors
      #+begin_src emacs-lisp
        (autoload 'ansi-color-apply "ansi-color")
        ;; (add-hook 'eshell-preoutput-filter-functions 'ansi-color-filter-apply)
        (add-hook 'eshell-preoutput-filter-functions 'ansi-color-apply)

        (use-package eshell-syntax-highlighting
          :after esh-mode
          :ensure t
          :config
          ;; Enable in all Eshell buffers.
          (eshell-syntax-highlighting-global-mode +1))
      #+end_src
***** Visual commands
      #+begin_src emacs-lisp
        (require 'em-term)
        ;;; commands using ansi scape seqs
        (dolist (c '("editor" "more" "wget" "dict" "vim" "links" "w3m"
                     "ssh" "autossh" "zmore" "pager" "aptitude" "su" "htop" "top"
                     "screen" "whizzml" "iex"))
          (add-to-list 'eshell-visual-commands c))

        (setq eshell-visual-subcommands '(("git" "log" "diff" "show")
                                          ("sudo" "vim")
                                          ("rebar3" "shell"))
              eshell-destroy-buffer-when-process-dies nil
              eshell-escape-control-x t)

      #+end_src
***** bol
      #+begin_src emacs-lisp
        (defun jao-eshell-maybe-bol ()
          (interactive)
          (let ((p (point)))
            (eshell-bol)
            (if (= p (point))
                (beginning-of-line))))
      #+end_src
***** Prompt
      #+BEGIN_SRC emacs-lisp
      ;; tracking git repos
      (defun jao-eshell--git-dirty ()
        (shell-command-to-string "git diff-index --quiet HEAD -- || echo -n '*'"))

      (use-package git-ps1-mode
        :ensure t
        :init (setq git-ps1-mode-showupstream "1"
                    git-ps1-mode-showdirtystate "1"))

      (defun jao-eshell--git-info ()
        (if (fboundp 'git-ps1-mode-get-current)
            (git-ps1-mode-get-current)
          (let ((desc (shell-command-to-string "git branch --no-color")))
            (when (string-match "^* \\(\\<.+\\>\\)" desc)
              (format "%s%s" (match-string 1 desc) (jao-eshell--git-dirty))))))

      (defun jao-eshell--git-current-branch (suffix)
        (let ((desc (or (jao-eshell--git-info) "")))
          (cond ((and (string-empty-p desc) suffix) (format " (%s)" suffix))
                ((string-empty-p (or suffix "")) (format " (%s)" desc))
                (t (format " (%s %s)" desc suffix)))))

      (defun jao-eshell--virtualenv ()
        (let ((venv (getenv "VIRTUAL_ENV")))
          (when (and venv (string-match ".*/\\([^/]+\\)/$" venv))
            (match-string-no-properties 1 venv))))

      (defun jao-eshell-prompt-function ()
        (let* ((venv (jao-eshell--virtualenv))
               (venv (if venv (format "%s" venv) "")))
          (concat (abbreviate-file-name (eshell/pwd))
                  (jao-eshell--git-current-branch venv)
                  (if (= (user-uid) 0) " # " " $ "))))

      (setq eshell-prompt-function 'jao-eshell-prompt-function)
      #+END_SRC
***** in-term
      #+begin_src emacs-lisp
        (defun eshell/in-term (prog &rest args)
          (switch-to-buffer
           (apply #'make-term (format "in-term %s %s" prog args) prog nil args))
          (term-mode)
          (term-char-mode))
      #+end_src
***** Dir navigation
      #+BEGIN_SRC emacs-lisp
      (use-package eshell-up
        :ensure t
        :config (setq eshell-up-print-parent-dir t))

      (use-package eshell-autojump :ensure t)
      #+END_SRC
***** Completion
      #+begin_src emacs-lisp
        (defun jao-eshell-completion-capf ()
          (let ((c (bash-completion-dynamic-complete-nocomint
                    (save-excursion (eshell-bol) (point))
                    (point)
                    t)))
            (when (and c (listp c))
              (append c '(:exclusive no)))))

        (defun jao-eshell--add-bash-completion ()
          (setq completion-at-point-functions
                '(jao-eshell-completion-capf
                  pcomplete-completions-at-point t)))

        (use-package bash-completion
          :ensure t
          :hook (eshell-mode . jao-eshell--add-bash-completion))
      #+end_src
***** History
      #+BEGIN_SRC emacs-lisp
        (setq eshell-history-size 10000)
        ;;; Fix eshell history completion to allow !$
        ;; This is done by advising eshell-history-reference to expand !$
        ;; into !!:$ which works...
        (defadvice jao-eshell-history-reference (before ben-fix-eshell-history)
          "Fixes eshell history to allow !$ as abbreviation for !!:$"
          (when (string= (ad-get-arg 0) "!$") (ad-set-arg 0 "!!:$")))
        (ad-activate 'jao-eshell-history-reference)
      #+END_SRC
      This is needed if we want ! to expand in emacs >= 27
      #+BEGIN_SRC emacs-lisp
        (add-hook 'eshell-expand-input-functions #'eshell-expand-history-references)
      #+END_SRC
***** Workarounds
      #+begin_src emacs-lisp
        ;; at some point, bash completion started insertig the TAB
        ;; after the commands ends
        (defun jao-eshell--clean-prompt ()
          (eshell-bol)
          (ignore-errors (kill-line)))

        (add-hook 'eshell-after-prompt-hook 'jao-eshell--clean-prompt)
      #+end_src
***** Keybindings
      #+begin_src emacs-lisp
        (defun jao-eshell--kbds ()
          (define-key eshell-mode-map "\C-a" 'jao-eshell-maybe-bol)
          (define-key eshell-mode-map "\C-ci" 'consult-outline))
        ;; Eshell mode is sillily re-creating its mode map
        ;; in every buffer in emacs < 28.
        (if (> emacs-major-version 27)
            (jao-eshell--kbds)
          (add-hook 'eshell-mode-hook #'jao-eshell--kbds))
      #+end_src
*** shell here
    #+begin_src emacs-lisp
      (defun jao-shell-here--find-window (b)
        (when-let (w (seq-find (lambda (w) (eq (window-buffer w) b))
                               (window-list)))
          (select-window w)))

      (defun jao-shell-frame-buffer (&optional b)
        (let ((p 'jao-eshell-buffer))
          (if b (set-frame-parameter nil p b) (frame-parameter nil p))))

      (defun jao-shell--cd-here (dir)
        (eshell-kill-input)
        (eshell/cd dir)
        (insert "\n")
        (eshell-send-input))

      (defun jao-shell-here (&optional stay)
        (interactive)
        (let* ((dir default-directory)
               (b (jao-shell-frame-buffer)))
          (jao-with-attached-buffer "^\\*eshell" 35
            (if (buffer-live-p b)
                (pop-to-buffer b nil t)
              (eshell)
              (jao-shell-frame-buffer (current-buffer))))
          (eshell-save-some-history)
          (unless stay (jao-shell--cd-here dir))))

      (defun eshell/x ()
        (when (derived-mode-p 'eshell-mode)
          (when (fboundp 'eshell-autojump-save)
            (eshell-autojump-save))
          (eshell-save-some-history))
        (if (> (frame-height) (window-height)) (delete-window) (bury-buffer)))

      (defun jao-shell-here-toggle ()
        (interactive)
        (if (eq (current-buffer) (jao-shell-frame-buffer))
            (eshell/x)
          (jao-shell-here t)))

      (global-set-key (kbd "C-!") #'jao-shell-here)
      (global-set-key [(f1)] #'jao-shell-here-toggle)
    #+end_src
* Version control and CI
*** General options
    #+BEGIN_SRC emacs-lisp
    (setq vc-follow-symlinks t)
    (setq auto-revert-check-vc-info nil)
    #+END_SRC
*** Diff fringe indicators (diff-hl)
    #+begin_src emacs-lisp
      (use-package diff-hl
        :ensure t
        :custom ((diff-hl-draw-borders nil)
                 (diff-hl-side 'right)
                 (diff-hl-margin-symbols-alist
                  '((insert . "+")
                    (delete . "-")
                    (change . "~")
                    (unknown . "?")
                    (ignored . "i"))))
        :config
        (map-keymap (lambda (_k cmd)
                      (put cmd 'repeat-map 'diff-hl-command-map))
                    diff-hl-command-map)
        (add-hook 'magit-post-refresh-hook 'diff-hl-magit-post-refresh)
        (when (jao-colors-scheme-dark-p) (diff-hl-margin-mode 1)))

      (global-diff-hl-mode 1)

    #+end_src
*** Git config files: more informative diffs
    See [[https://protesilaos.com/codelog/2021-01-26-git-diff-hunk-elisp-org/][Informative diff hunks for Emacs Lisp and Org | Protesilaos Stavrou]]
    #+begin_src config :tangle ~/.config/git/attributtes :comments no
      *.clj  diff=lisp
      *.cljc  diff=lisp
      *.cljs  diff=lisp
      *.lisp  diff=lisp
      *.el    diff=lisp
      *.org   diff=org
    #+end_src
    #+begin_src gitconfig :tangle ~/.config/git/config
      [diff "lisp"]
	xfuncname = "^(((;;;+ )|\\(|([ \t]+\\(((cl-|el-patch-)?def(un|var|macro|method|custom)|gb/))).*)$"
      [diff "org"]
	xfuncname = "^(\\*+ +.*)$"
    #+end_src
*** Magit and forge
    #+begin_src emacs-lisp
      (use-package magit
        :ensure t
        :commands magit-status
        :init
        (setq magit-status-initial-section nil
              magit-completing-read-function 'magit-builtin-completing-read
              magit-display-buffer-function
              'magit-display-buffer-fullcolumn-most-v1
              magit-delete-by-moving-to-trash nil
              magit-last-seen-setup-instructions "1.4.0"
              magit-log-edit-confirm-cancellation t
              magit-omit-untracked-dir-contents t
              magit-process-connection-type nil
              magit-push-always-verify nil
              magit-repository-directories
              '(("/home/jao/usr/bigml" . 2)
                ("/home/jao/usr/jao" . 2)
                ("/home/jao/lib" . 2))
              magit-save-repository-buffers 'dontask
              magit-status-buffer-switch-function 'switch-to-buffer
              magit-status-show-hashes-in-headers t)
        :bind (("<f2>" . magit-status)
               :map magit-status-mode-map
                    ("C-c C-r" . github-review-forge-pr-at-point)))

      (use-package forge
        :ensure t
        :after magit
        :init
        (setq forge-database-file
              (format "~/.emacs.d/forge-database-%s.sqlite" emacs-major-version)
              forge-topic-list-limit (cons 25 10))
        ;; workaround for ghub problems (shoudn't be needed in 27.x)
        (when (< emacs-major-version 27)
          (setq gnutls-algorithm-priority "NORMAL:-VERS-TLS1.3")
          (setq ghub-use-workaround-for-emacs-bug nil))
        :bind (:map forge-topic-mode-map ("M-w" . copy-region-as-kill))
        :config
        (remove-hook 'magit-status-sections-hook #'forge-insert-issues)
        ;; (add-hook 'magit-status-sections-hook #'forge-insert-notifications t)
        (add-hook 'magit-status-sections-hook #'forge-insert-requested-reviews t)
        (add-hook 'magit-status-sections-hook #'forge-insert-assigned-issues t)
        (add-hook 'magit-status-sections-hook #'forge-insert-issues t))
    #+end_src
*** Eldoc for magit status/log buffers
    [[https://tsdh.org/posts/2021-06-21-using-eldoc-with-magit.html][Using Eldoc with Magit]].
    #+begin_src emacs-lisp
      (defun jao-magit-eldoc-for-commit (_callback)
        (when-let ((commit (magit-commit-at-point)))
          (with-temp-buffer
            (magit-git-insert "show"
                              "--format=format:%an <%ae>, %ar"
                              (format "--stat=%d" (window-width))
                              commit)
            (goto-char (point-min))
            (put-text-property (point-min) (line-end-position) 'face 'bold)
            (buffer-string))))

      (defun jao-magit-eldoc-setup ()
        (add-hook 'eldoc-documentation-functions
                  #'jao-magit-eldoc-for-commit nil t)
        (eldoc-mode 1))

      (add-hook 'magit-log-mode-hook #'jao-magit-eldoc-setup)
      ;; (add-hook 'magit-status-mode-hook #'jao-magit-eldoc-setup)

      (with-eval-after-load "eldoc"
        (eldoc-add-command 'magit-next-line)
        (eldoc-add-command 'magit-previous-line)
        (eldoc-add-command 'magit-section-forward)
        (eldoc-add-command 'magit-section-backward))
    #+end_src
*** Other git packages
    #+begin_src emacs-lisp
      (use-package git-messenger
        :ensure t
        :bind (("C-x v p" . git-messenger:popup-message)))

      (use-package gist :ensure t)

      (use-package git-timemachine :ensure t)

      ;; git config --local git-link.remote / git-link.branch
      (use-package git-link :ensure t)

      (use-package git-modes :ensure t)

      (use-package github-review
        :ensure t
        :config
        (defun jao-gnus-github-review ()
          (interactive)
          (gnus-summary-select-article-buffer)
          (goto-char (point-min))
          (when (re-search-forward "https://github\.com/.*/pull/.*" nil t)
            (let ((url (match-string-no-properties 0)))
              (when (yes-or-no-p (format "Start review for %s" url))
                (github-review-start url)))))
        (eval-after-load "gnus-art"
          '(progn
             (define-key gnus-summary-mode-map "\C-cG" 'jao-gnus-github-review)
             (define-key gnus-article-mode-map "\C-cG" 'jao-gnus-github-review)))

        (jao-transient-major-mode github-review
          ["Review"
           ("a" "Approve" github-review-approve)
           ("r" "Reject" github-review-reject)
           ("c" "Comment" github-review-reject)]
          ["Quit"
           ("Q" "Bury buffer" bury-buffer)
           ("k" "Kill buffer" kill-buffer)]))

    #+end_src
*** Jenkins
    [[https://github.com/rmuslimov/jenkins.el][GitHub - rmuslimov/jenkins.el: Jenkins plugin for emacs]]
    #+BEGIN_SRC emacs-lisp
      (use-package jenkins
        :ensure t
        :init
        ;; one also needs jenkins-api-token, jenkins-username and jenkins-url
        ;; optionally: jenkins-colwidth-id, jenkins-colwidth-last-status
        (setq jenkins-colwidth-name 35)
        :config
        (defun jao-jenkins-first-job (&rest _)
          (interactive)
          (goto-char (point-min))
          (when (re-search-forward "^- Job" nil t)
            (goto-char (match-beginning 0))))
        (add-hook 'jenkins-job-view-mode-hook #'jao-jenkins-first-job)
        (advice-add 'jenkins-job-render :after #'jao-jenkins-first-job)

        (defun jenkins-refresh-console-output ()
          (interactive)
          (let ((n (buffer-name)))
            (when (string-match "\\*jenkins-console-\\([^-]+\\)-\\(.+\\)\\*$" n)
              (jenkins-get-console-output (match-string 1 n) (match-string 2 n))
              (goto-char (point-max)))))

        :bind (:map jenkins-job-view-mode-map
                    (("n" . next-line)
                     ("p" . previous-line)
                     ("f" . jao-jenkins-first-job)
                     ("RET" . jenkins--show-console-output-from-job-screen))
                    :map jenkins-console-output-mode-map
                    (("n" . next-line)
                     ("p" . previous-line)
                     ("g" . jenkins-refresh-console-output))))
    #+END_SRC
* Programming
*** Automatic modes
    #+BEGIN_SRC emacs-lisp
      (add-to-list 'auto-mode-alist '("\\.mix\\'" . hexl-mode))
      (add-to-list 'auto-mode-alist '("\\.m4\\'" . m4-mode))
      (add-to-list 'auto-mode-alist '("\\.am\\'" . makefile-mode))
      (add-to-list 'auto-mode-alist '("\\.pl\\'\\|\\.pm\\'" . cperl-mode))
    #+END_SRC
*** Smart scan
    #+begin_src emacs-lisp
      (use-package smartscan
        :ensure t
        :commands smartscan-mode
        :init (add-hook 'prog-mode-hook #'smartscan-mode)
        :diminish)
    #+end_src
*** Paredit and parens
    #+begin_src emacs-lisp
      (require 'paren)
      (show-paren-mode t)
      (setq show-paren-context-when-offscreen t)

      (use-package paredit
        :ensure t
        :commands paredit-mode
        :hook ((pie-mode . paredit-mode)
               (scheme-mode . paredit-mode)
               (clojure-mode . paredit-mode)
               (emacs-lisp-mode . paredit-mode)
               (eval-expression-minibuffer-setup . paredit-mode)
               (lisp-interaction-mode . disable-paredit-mode))
        :diminish ((paredit-mode . " þ")))
    #+end_src
*** Diff/Ediff
    #+BEGIN_SRC emacs-lisp
      (setq ediff-split-window-function 'split-window-horizontally)
      (setq ediff-make-buffers-readonly-at-startup nil)
      (setq ediff-window-setup-function 'ediff-setup-windows-plain)
      (setq ediff-keep-variants nil)
    #+END_SRC
*** Compilation
***** Compilation mode options
      #+begin_src emacs-lisp
      (require 'compile)
      (setq compilation-scroll-output t)
      (setq compilation-error-regexp-alist
            (remove 'omake compilation-error-regexp-alist))
      ;; (add-hook 'compilation-mode-hook #'visual-line-mode)
      #+end_src
***** Mode line (no "Compiling"!)
      #+BEGIN_SRC emacs-lisp
        (require 'compile)
        (diminish 'compilation-minor-mode " ‡")
        (when (< emacs-major-version 27)
          (setcdr (assq 'compilation-in-progress minor-mode-alist) '(" ‡")))
        (when (> emacs-major-version 26)
          (setcdr (assq 'compilation-in-progress mode-line-modes) '("‡ ")))
      #+END_SRC
***** Colorizing compilation buffer
      #+BEGIN_SRC emacs-lisp
        (require 'ansi-color)
        (defun endless/colorize-compilation ()
          "Colorize from `compilation-filter-start' to `point'."
          (let ((inhibit-read-only t))
            (ansi-color-apply-on-region
             compilation-filter-start (point))))

        (add-hook 'compilation-filter-hook #'endless/colorize-compilation)
      #+END_SRC
***** Compilation commands
      #+begin_src emacs-lisp
        (use-package jao-compilation
          :commands jao-compilation-setup
          :bind (("C-c C" . compile)
                 ("C-c c" . jao-compile)))
        (jao-compilation-setup)
      #+end_src
***** Next error
      #+begin_src emacs-lisp
        (setq next-error-find-buffer-function
              #'next-error-buffer-on-selected-frame
              next-error-verbose t)
      #+end_src
*** Flymake
    #+begin_src emacs-lisp
      (use-package flymake
        :ensure t
        :custom ((flymake-mode-line-format '(" " flymake-mode-line-counters)))
        :hook ((haskell-mode . flymake-mode))
        :config (jao-define-attached-buffer "^\\*Flymake diagnostics .*\\*\\'")
        :bind (:map flymake-mode-map (("s-f n" . flymake-goto-next-error)
                                      ("s-f p" . flymake-goto-prev-error)
                                      ("s-f i" . flymake-show-diagnostic)
                                      ("s-f f" . flymake-show-diagnostics-buffer)
                                      ("s-f l" . consult-flymake))))
    #+end_src
* Programming languages
*** Elisp
    #+begin_src emacs-lisp
      (use-package edit-list :ensure t)
      (use-package package-lint :ensure t)

      (defun elisp-disassemble (function)
        (interactive (list (function-called-at-point)))
        (disassemble function))

      (defun elisp-pp (sexp)
        (with-output-to-temp-buffer "*Pp Eval Output*"
          (pp sexp)
          (with-current-buffer standard-output
            (emacs-lisp-mode))))

      (defun elisp-macroexpand (form)
        (interactive (list (form-at-point 'sexp)))
        (elisp-pp (macroexpand form)))

      (defun elisp-macroexpand-all (form)
        (interactive (list (form-at-point 'sexp)))
        (elisp-pp (macroexpand-all form)))

      (defun elisp-find-definition (name)
        (interactive (list (thing-at-point 'symbol)))
        (cond (name
               (let ((symbol (intern-soft name))
                     (search (lambda (fun sym)
                               (let* ((r (save-excursion (funcall fun sym)))
                                      (buffer (car r))
                                      (point (cdr r)))
                                 (cond ((not point)
                                        (error "Found no definition for %s in %s"
                                               name buffer))
                                       (t
                                        (switch-to-buffer buffer)
                                        (goto-char point)
                                        (recenter 1)))))))
                 (cond ((fboundp symbol)
                        (xref-push-marker-stack)
                        (funcall search 'find-function-noselect symbol))
                       ((boundp symbol)
                        (xref-push-marker-stack)
                        (funcall search 'find-variable-noselect symbol))
                       (t
                        (message "Symbol not bound: %S" symbol)))))
              (t (message "No symbol at point"))))


      (defun elisp-bytecompile-and-load ()
        (interactive)
        (or buffer-file-name
            (error "The buffer must be saved in a file first"))
        (require 'bytecomp)
        ;; Recompile if file or buffer has changed since last compilation.
        (when  (and (buffer-modified-p)
                    (y-or-n-p (format "save buffer %s first? " (buffer-name))))
          (save-buffer))
        (let ((filename (expand-file-name buffer-file-name)))
          (with-temp-buffer
            (byte-compile-file filename t))))

      (use-package elisp-mode
        :bind (:map emacs-lisp-mode-map
                    (("C-c C-M" . emacs-lisp-macroexpand)
                     ("C-c C-m" . elisp-macroexpand-all)
                     ("C-c C-k" . elisp-bytecompile-and-load)
                     ("C-c C-p" . pp-eval-last-sexp)
                     ("M-." . elisp-find-definition)
                     ("M-," . pop-tag-mark)
                     ("C-c <" . lc-show-package-summary))))
    #+end_src
*** Erlang
    #+begin_src emacs-lisp
      (use-package erlang
        :disabled t
        :ensure t
        :custom ((inferior-erlang-machine-options '("shell"))
                 (inferior-erlang-machine "rebar3")
                 (inferior-erlang-shell-type nil)
                 (erlang-indent-level 4))

        ;; :bind (:map erlang-mode-map (("C-c C-z" . jao-vterm-repl-pop-to-repl)))

        :init
        ;; (require 'jao-vterm-repl)
        ;; (add-to-list 'auto-mode-alist '("^rebar\\.config\\`" . erlang-mode))
        ;; (jao-vterm-repl-register "rebar.config" "rebar3 shell" "^[0-9]+> ")

        :config
        ;; (defun jao-erlang-current-module ()
        ;;   (when (save-excursion (goto-char (point-min))
        ;;                         (re-search-forward "^-module(\\([^)]+\\))" nil t))
        ;;     (match-string-no-properties 1)))

        ;; (defun jao-erlang-compile (arg)
        ;;   (interactive "P")
        ;;   (save-some-buffers)
        ;;   (when-let ((mname (jao-erlang-current-module)))
        ;;     (with-current-buffer (jao-vterm-repl)
        ;;       (vterm-send-string (format "c(%s).\n" mname))
        ;;       (sit-for 0)
        ;;       (setq compilation-last-buffer (current-buffer))
        ;;       (when arg (jao-vterm-repl-pop-to-repl)))))

        ;; (setq erlang-shell-function #'jao-vterm-repl
        ;;       erlang-shell-display-function #'jao-vterm-repl-pop-to-repl
        ;;       erlang-compile-function #'jao-erlang-compile)
        )
    #+end_src
*** Idris
    #+begin_src emacs-lisp :tangle no
      (use-package idris-mode
        :ensure t
        :custom ((idris-interpreter-path "idris2")
                 (idris-pretty-printer-width 80)
                 (idris-repl-history-file "~/.emacs.d/cache/idris-history.eld")
                 (idris-stay-in-current-window-on-compiler-error t)))
      (jao-define-attached-buffer "^\\*idris.*" 0.4)
    #+end_src
*** Clojure
    #+begin_src emacs-lisp
      (use-package clojure-mode
        :ensure t
        :config
        (defun jao-clojure--fix-things ()
          (setq-local completion-styles '(basic partial-completion emacs22))
          (eldoc-mode 1)
          (setq mode-name "λ"))
        :hook (clojure-mode . jao-clojure--fix-things))

      (use-package cider
        :ensure t
        :commands cider-mode
        :init (setq cider-annotate-completion-candidates t
                    cider-auto-select-error-buffer nil
                    clojure-docstring-fill-column 72
                    cider-show-error-buffer 'except-in-repl
                    cider-lein-parameters "repl :headless :host localhost"
                    cider-mode-line  " ÷"
                    cider-prompt-for-symbol nil
                    cider-repl-pop-to-buffer-on-connect nil
                    cider-repl-history-file
                    (expand-file-name "~/.emacs.d/cache/cider.history")
                    cider-repl-use-pretty-printing t
                    cider-test-show-report-on-success nil
                    cider-auto-select-test-report-buffer nil
                    cider-use-overlays nil
                    cider-use-fringe-indicators nil
                    cider-eldoc-display-for-symbol-at-point t
                    nrepl-prompt-to-kill-server-buffer-on-quit nil))

      (with-eval-after-load "cider-test"
        (advice-add 'cider-scale-background-color :override
                    (lambda () (frame-parameter nil 'background-color)))
        (setq cider-test-items-background-color
              (frame-parameter nil 'background-color)))

      (use-package cider-macroexpansion
        :after cider
        :diminish " µ")

    #+end_src
*** Geiser
    #+begin_src emacs-lisp
      (defun jao-org--set-geiser-impl () (setq-local geiser-repl--impl 'guile))
      (add-hook 'org-mode-hook #'jao-org--set-geiser-impl)

      (jao-load-path "geiser/geiser/elisp")
      (use-package geiser
        :init
        (setq geiser-repl-history-filename "~/.emacs.d/cache/geiser-history")
        (setq geiser-repl-startup-time 20000)
        (setq geiser-debug-auto-display-images-p t))

      (jao-load-path "geiser/mit")
      (use-package geiser-mit)

      ;; (jao-load-path "geiser/chicken")
      ;; (use-package geiser-chicken)

      ;; (jao-load-path "geiser/chibi")
      ;; (use-package geiser-chibi)

      (jao-load-path "geiser/guile")
      (use-package geiser-guile)

      (jao-load-path "geiser/chez")
      (use-package geiser-chez
        :init (setq geiser-chez-binary "scheme"))

      (jao-load-path "geiser/gambit")
      (use-package geiser-gambit)
    #+end_src
*** Pie
    #+begin_src emacs-lisp
      (jao-load-path "pie")
      (use-package pie
        :demand t
        :commands (pie-mode))
    #+end_src
*** Lisp
    #+begin_src emacs-lisp :tangle no
      (use-package sly
        :ensure t
        :init (setq inferior-lisp-program "sbcl")
        :config (sly-setup))

      (use-package sly-quicklisp
        :after (sly)
        :ensure t)
    #+end_src
*** Haskell
***** packages
      #+begin_src emacs-lisp
        (use-package haskell-mode
          :ensure t
          :custom
          ((inferior-haskell-find-project-root t)
           (haskell-check-remember-last-command-p nil)
           (haskell-font-lock-symbols nil)
           (haskell-interactive-popup-errors nil)
           (haskell-process-auto-import-loaded-modules t)
           (haskell-process-log t)
           (haskell-process-suggest-remove-import-lines t)
           (haskell-process-suggest-hoogle-imports t)
           (haskell-process-type 'cabal-repl)
           (haskell-process-use-presentation-mode t)
           (haskell-stylish-on-save nil))

          :config
          (defun jao-haskell-hoogle (query)
            (interactive (hoogle-prompt))
            (haskell-hoogle query t))

          (put 'haskell-process-args-cabal-repl
               'safe-local-variable
               (apply-partially #'seq-every-p #'stringp))

          (require 'haskell-doc)
          (dolist (h '(interactive-haskell-mode
                       haskell-doc-mode
                       haskell-decl-scan-mode
                       haskell-indentation-mode
                       haskell-auto-insert-module-template))
            (add-hook 'haskell-mode-hook h))

          :bind (:map haskell-mode-map
                      (("C-c C-d" . jao-haskell-hoogle)
                       ("C-c h" . haskell-hoogle-lookup-from-local)
                       ("C-c C-c" . haskell-compile))))

        (require 'haskell)

        (diminish 'interactive-haskell-mode " λ")
        (diminish haskell-doc-mode)
        (diminish haskell-decl-scan-mode)

        (jao-define-attached-buffer "\\*hoogle\\*.*")

        ;; needs cabal install apply-refact
        (use-package hlint-refactor
          :ensure t
          :after (haskell-mode)
          :diminish ""
          :hook (haskell-mode . hlint-refactor-mode))
      #+end_src
***** transient
      #+begin_src emacs-lisp
        (jao-transient-major-mode haskell
          ["Imports"
           ("in" "Navigate imports" haskell-navigate-imports)
           ("if" "Format imports" haskell-mode-format-imports)
           ("is" "Sort imports" haskell-sort-imports)
           ("ia" "Align imports" haskell-align-imports)]
          ["Code"
           ("c" "Compile" haskell-compile)
           ("s" "stylish on buffer" haskell-mode-stylish-buffer)]
          ["Hoogle"
           ("h" "Hoogle" jao-haskell-hoogle)
           ("H" "Hoogle from local server" haskell-hoogle-lookup-from-local)])
      #+end_src
*** Prolog
    #+BEGIN_SRC emacs-lisp
      (use-package ediprolog :ensure t)

      (use-package prolog
        :ensure t
        :commands (run-prolog prolog-mode mercury-mode)
        :init (progn
                (setq prolog-system 'swi)
                (add-to-list 'auto-mode-alist '("\\.pl$" . prolog-mode))
                (setq prolog-consult-string '((t "[%f].")))
                (setq prolog-program-name
                      '(((getenv "EPROLOG") (eval (getenv "EPROLOG")))
                        (eclipse "eclipse")
                        (mercury nil)
                        (sicstus "sicstus")
                        (swi "swipl")
                        (t "prolog")))))
    #+END_SRC
*** Python
***** Virtual envs (with eshell support)
      See also [[https://github.com/porterjamesj/virtualenvwrapper.el][the docs]].
      #+begin_src emacs-lisp
        (use-package virtualenvwrapper
          :ensure t
          :config
          (venv-initialize-eshell)
          (jao-compilation-env "VIRTUAL_ENV"))
      #+end_src
*** JSON
    #+BEGIN_SRC emacs-lisp
      (use-package json-mode :ensure t)
      ;; (use-package json-navigator :ensure nil)
    #+END_SRC
* Graphics
*** Images
    #+begin_src emacs-lisp
      (setq image-use-external-converter t)
    #+end_src
*** Gnuplot
    #+BEGIN_SRC emacs-lisp
      (use-package gnuplot
        :ensure t
        :commands (gnuplot-mode gnuplot-make-buffer)
        :init (add-to-list 'auto-mode-alist '("\\.gp$" . gnuplot-mode)))
    #+END_SRC
* Network
*** network monitor
    #+begin_src emacs-lisp
      (jao-def-exec jao-nm-applet "nm-applet")

      (defun jao-toggle-nm-applet ()
        (interactive)
        (if (string-empty-p (jao-exec-string "pidof nm-applet"))
            (jao-nm-applet)
          (jao-exec-string "killall nm-applet")))
    #+end_src
*** bluetooth
    #+BEGIN_SRC emacs-lisp
    (use-package bluetooth :ensure t)
    #+END_SRC
*** vpn
    #+begin_src emacs-lisp
      (use-package jao-mullvad :demand t)
    #+end_src
*** ssh
    #+begin_src emacs-lisp
      (use-package tramp)
      (defun jao-tramp-hosts ()
        (seq-uniq
         (mapcan (lambda (x)
                   (remove nil (mapcar 'cadr (apply (car x) (cdr x)))))
                 (tramp-get-completion-function "ssh"))
         #'string=))

      (defun jao-ssh ()
        (interactive)
        (let ((h (completing-read "Host: " (jao-tramp-hosts))))
          (jao-exec-in-term (format "ssh %s" h) (format "* ssh %s *" h))))
    #+end_src
* Chats
*** circe
    #+begin_src emacs-lisp
      (defvar jao-libera-channels '())
      (defvar jao-oftc-channels '())
      (defvar jao-bitlbee-channels '())

      (use-package circe
        :ensure t
        :bind (:map circe-channel-mode-map
                    (("C-c C-a" . lui-track-jump-to-indicator)))
        :init
        (setq circe-chat-buffer-name "{target}"
              circe-default-realname "https://jao.io"
              circe-default-part-message ""
              circe-default-quit-message ""
              circe-ignore-list nil
              circe-server-coding-system '(undecided . undecided)
              circe-server-killed-confirmation 'ask-and-kill-all
              circe-server-auto-join-default-type :after-auth
              circe-format-say "({nick}) {body}"
              circe-format-self-say "(jao) {body}"
              circe-new-buffer-behavior 'ignore
              circe-new-buffer-behavior-ignore-auto-joins t
              circe-nickserv-ghost-style 'after-auth
              circe-prompt-string ": "
              circe-completion-suffix ", "
              circe-reduce-lurker-spam t

              circe-nick-next-function
              (lambda (old)
                (replace-regexp-in-string "-" "`" (circe-nick-next old)))

              circe-lagmon-mode-line-format-string "" ;;  "%.0f "
              circe-lagmon-mode-line-unknown-lag-string "" ;; "? "
              circe-lagmon-timer-tick 120
              circe-lagmon-reconnect-interval 180

              lui-max-buffer-size 30000
              lui-fill-column 80
              lui-time-stamp-position 'right
              lui-time-stamp-format "%H:%M"
              lui-flyspell-p nil

              lui-track-indicator 'fringe
              lui-track-behavior 'before-tracking-next-buffer)
        :config

        (defun circe-command-RECOVER (&rest ignore)
          "Recover nick"
          (let* ((fn (jao--get-user/password "freenode"))
                 (u (car fn))
                 (p (cadr fn)))
            (circe-command-MSG "nickserv" (format "IDENTIFY %s %s" u p))
            (circe-command-MSG "nickserv" (format "GHOST %s" u))
            (circe-command-MSG "nickserv" (format "RELEASE %s" u))
            (circe-command-NICK u)))

        (defun circe-command-NNICKS (&rest _)
          "Echo number of nicks"
          (message "%d nicks in this channel" (length (circe-channel-nicks))))

        (advice-add 'circe-command-NAMES :after #'circe-command-NNICKS)

        (setq circe-network-options
              (let ((up (jao--get-user/password "libera"))
                    (oup (jao--get-user/password "oftc"))
                    (bup (jao--get-user/password "bitlbee")))
                `(("Libera Chat"
                   :nick ,(car up) :channels ,jao-libera-channels
                   :tls t :sasl-username ,(car up) :sasl-password ,(cadr up))
                  ("OFTC" :nick ,(car oup) :channels ,jao-oftc-channels
                   :nickserv-password ,(cadr oup)
                   :tls t :sasl-username ,(car oup) :sasl-password ,(cadr oup))
                  ("Bitlbee"
                   :host "127.0.0.1" :nick ,(car bup)
                   :channels ,jao-bitlbee-channels
                   :lagmon-disabled t
                   :nickserv-password ,(cadr bup) :user ,(car bup)))))

        (jao-shorten-modes 'circe-channel-mode
                           'circe-server-mode
                           'circe-query-mode)

        (enable-lui-track)
        (circe-lagmon-mode)
        (enable-circe-display-images))
    #+end_src
*** slack
    [[https://github.com/jackellenberger/emojme#finding-a-slack-token][How to get a token]]: It's easyish! Open and sign into the slack
    customization page, e.g. https://my.slack.com/customize, right
    click anywhere > inspect element. Open the console and paste:

         =window.prompt("your api token is: ", TS.boot_data.api_token)=

    Lately things are iffy.  We've needed to add the ~:override~ to
    slack-counts update, and it might be needed to replace
    ~slack-conversations-view~ by ~slack-conversations-history~

    #+begin_src emacs-lisp
      (use-package slack
        :commands (slack-start)
        :init
        (setq slack-alert-icon (jao-data-file "slack.svg")
              slack-buffer-emojify nil
              slack-buffer-create-on-notify t
              slack-display-team-name t
              slack-typing-visibility 'never ;; 'buffer, 'frame
              slack-profile-image-file-directory "/tmp/slack-imgs/"
              slack-image-file-directory "/tmp/slack-imgs/"
              slack-file-dir "~/var/download/slack/"
              slack-prefer-current-team t
              slack-message-tracking-faces '(warning)
              slack-log-level 'warn
              slack-message-custom-notifier (lambda (msg room team) room))
        :bind (:map slack-mode-map
              (("@" . slack-message-embed-mention)
               ("#" . slack-message-embed-channel)))
        :config
        (dolist (f (list slack-file-dir slack-image-file-directory))
          (when (not (file-exists-p f)) (make-directory f)))

        (jao-shorten-modes 'slack-message-buffer-mode
                           'slack-thread-message-buffer-mode)
        (jao-tracking-faces 'warning)

        (jao-define-attached-buffer "\\*Slack .+ Edit Message [0-9].+" 20))
    #+end_src
*** telegram
    #+begin_src emacs-lisp
      (use-package telega
        :ensure t
        :custom
        (telega-use-tracking-for '(unmuted) ;; '(or unmuted mention)
         telega-rainbow-color-custom-for nil
         telega-msg-rainbow-title nil
         telega-sticker-set-download t)
        :config
        (define-key global-map (kbd "C-c C-t") telega-prefix-map)
        (setq telega-chat-show-avatars nil
              telega-root-show-avatars nil
              telega-chat-prompt-show-avatar-for nil
              telega-emoji-use-images nil
              telega-temp-dir "/tmp/telega"
              telega-symbol-checkmark "·"
              telega-symbol-heavy-checkmark "×"
              telega-symbol-verified "*"
              telega-mode-line-string-format
              '(:eval (telega-mode-line-unread-unmuted)))
        (with-eval-after-load "tracking"
          (jao-shorten-modes 'telega-chat-mode)
          (jao-tracking-faces 'telega-tracking))
        (telega-mode-line-mode 1))
    #+end_src
*** signel
    #+begin_src emacs-lisp
      (jao-load-org "lib/net/signel.org")
      (with-eval-after-load "tracking"
        (jao-tracking-faces 'signel-notification)
        (jao-shorten-modes 'signel-chat-mode))
      (setq signel-report-deliveries t)
    #+end_src
*** startup
    #+begin_src emacs-lisp
      (defun jao-chats (&optional p)
        (interactive "P")
        (when (or p (y-or-n-p "Connect to slack? "))
          (slack-start))
        (when (or p (y-or-n-p "Connect to telegram? "))
          (telega))
        (when (or p (y-or-n-p "Connect to libera? "))
          (circe "Libera Chat")))

      (defun jao-all-chats () (interactive) (jao-chats t))

      (defun jao-chats-telega ()
        (interactive)
        (jao-buffer-same-mode '(telega-root-mode telega-chat-mode)))

      (defun jao-chats-slack ()
        (interactive)
        (jao-buffer-same-mode 'slack-message-buffer-mode))

      (defun jao-chats-irc ()
        (interactive)
        (jao-buffer-same-mode '(circe-channel-mode circe-query-mode erc-mode)))

     #+end_src
* Multimedia
*** mixer
    #+begin_src emacs-lisp
      (defun jao-mixer-get-level (&optional dev)
        (interactive)
        (let* ((dev (or dev "Master"))
               (s (shell-command-to-string (format "amixer sget %s" dev)))
               (s (car (last (split-string s "\n" t)))))
          (when (string-match ".*Front .*\\[\\([0-9]+\\)%\\] .*" s)
            (let ((level (match-string 1 s)))
              (message "%s level: %s%%" dev level)
              (string-to-number level)))))

      (defun jao-mixer-set (dev v)
        (jao-exec-string "amixer sset %s %s" dev v)
        (jao-mixer-get-level dev))

      (defun jao-mixer-master-toggle ()
        (interactive)
        (jao-mixer-set "Master" "toggle"))

      (defun jao-mixer-master-up ()
        (interactive)
        (jao-mixer-set "Master" "10%+"))

      (defun jao-mixer-master-down ()
        (interactive)
        (jao-mixer-set "Master" "10%-"))

      (defun jao-mixer-capture-up ()
        (interactive)
        (jao-mixer-set "Capture" "10%+"))

      (defun jao-mixer-capture-down ()
        (interactive)
        (jao-mixer-set "Capture" "10%-"))

      (jao-def-exec jao-audio-applet "pasystray")

      (defun jao-toggle-audio-applet ()
        (interactive)
        (if (string-empty-p (jao-exec-string "pidof pasystray"))
            (jao-audio-applet)
          (jao-exec-string "killall pasystray")))

      (global-set-key (kbd "<f4>") #'jao-toggle-audio-applet)

    #+end_src
*** spotify
    Access to spotify uses packages tangled from [[./lib/media/espotify.org][espotify.org]], which
    offers functionality tailored to the completion engines at hand:
    #+begin_src emacs-lisp
      (jao-load-path "espotify")

      (use-package espotify :demand t)
      (use-package consult-spotify :demand t)
      (defalias 'jao-spotify-album #'consult-spotify-album)
      (defalias 'jao-spotify-track #'consult-spotify-track)
      (defalias 'jao-spotify-artist #'consult-spotify-artist)
      (defalias 'jao-spotify-playlist #'consult-spotify-playlist)
    #+end_src
*** mpc
    #+begin_src emacs-lisp
      (use-package jao-mpc
        :demand t
        :commands jao-mpc-setup)

      (defvar jao-mopidy-port 6669)
      (jao-mpc-setup jao-mopidy-port 70)

      (defun jao-mpc-pport ()
        (when (jao-mpc--playing-p jao-mopidy-port) jao-mopidy-port))

      (defmacro jao-defun-play (name &optional mpc-name)
        `(defun ,(intern (format "jao-player-%s" name)) ()
           (interactive)
           (,(intern (format "jao-mpc-%s" (or mpc-name name))) (jao-mpc-pport))))

      (jao-defun-play toggle)
      (jao-defun-play next)
      (jao-defun-play previous)
      (jao-defun-play stop)
      (jao-defun-play echo echo-current)
      (jao-defun-play list show-playlist)
      (jao-defun-play info lyrics-track-data)

      (defun jao-player-seek (delta) (jao-mpc-seek delta (jao-mpc-pport)))

      (defalias 'jao-player-browse 'jao-mpc-show-albums)
      (defalias 'jao-player-connect 'jao-mpc-connect)
      (defalias 'jao-player-play 'jao-mpc-play)
    #+end_src
*** transients
    #+begin_src emacs-lisp

      (require 'jao-lyrics)
      (setq jao-lyrics-info-function #'jao-player-info)

      (defun jao-player-volume-delta (raise)
        (jao-player-vol-delta (if raise 5 -5))
        (sit-for 0.05)
        (jao-player-show-volume))

      (defun jao-player-volume-raise ()
        (interactive)
        (jao-player-volume-delta t))

      (defun jao-player-volume-lower ()
        (interactive)
        (jao-player-volume-delta nil))

      (defun jao-player-show-volume ()
        (interactive)
        (jao-notify "Volume" (format "%s%%" (jao-player-volume))))

      (defun jao-player-seek-10 () (interactive) (jao-player-seek 10))
      (defun jao-player-seek--10 () (interactive) (jao-player-seek -10))

      (defun jao-spotify-clear () (interactive) (jao-mpc-clear jao-mopidy-port))
      (defun jao-spotify-echo-current ()
        (interactive)
        (jao-mpc-echo-current jao-mopidy-port))
      (defun jao-spotify-show-playlist ()
        (interactive)
        (jao-mpc-show-playlist jao-mopidy-port))

      (defun jao-player-seek-m10 ()
        (interactive)
        (jao-player-seek 10 jao-mopidy-port))
      (defun jao-player-seek-m-10 ()
        (interactive)
        (jao-player-seek -10 jao-mopidy-port))


      (defun jao-player-level-cap () (interactive) (jao-mixer-level "Capture"))

      (use-package jao-random-album :demand t)

      (transient-define-prefix jao-transient-spotify ()
        [["Search"
          ("a" "album" jao-spotify-album)
          ("A" "artist" jao-spotify-artist)
          ("t" "track" jao-spotify-track)
          ("P" "playlist" jao-spotify-playlist)]
         ["Play"
          ("s" "toggle" espotify-play-pause)
          ("n" "next" espotify-next)
          ("p" "previous" espotify-previous)]
         ["Seek"
          ("f" "seek fwd" jao-player-seek-m10 :transient t)
          ("F" "seek bwd" jao-player-seek-m-10 :transient t)]
         ["Browse"
          ("l" "playing list" jao-spotify-show-playlist)
          ("c" "clear list"jao-spotify-clear :transient t)
          ("w" "currently playing" jao-spotify-echo-current)]])

      (transient-define-prefix jao-transient-media ()
        [["Play"
          ("m" "toggle" jao-player-toggle)
          ("n" "next" jao-player-next)
          ("p" "previous" jao-player-previous)
          ("s" "toggle spotify" espotify-play-pause)]
         ["Seek and search"
          ("f" "seek fwd" jao-player-seek-10 :transient t)
          ("F" "seek bwd" jao-player-seek--10 :transient t)
          ("a" "select album" jao-mpc-select-album)]
         ["Browse"
          ("b" "browse" jao-player-browse)
          ("l" "show play list" jao-player-list)
          ("L" "show lyrics" jao-show-lyrics)
          ("w" "now playing" jao-player-echo)]
         ["Master volume"
          ("d" "master down" jao-mixer-master-down :transient t)
          ("u" "master up" jao-mixer-master-up :transient t)
          ("M" "master toggle" jao-mixer-master-toggle)
          ("v" "show" jao-mixer-get-level)]
         ["Capture volume"
          ("D" "capture down" jao-mixer-capture-down :transient t)
          ("U" "capture up" jao-mixer-capture-up :transient t)
          ("V" "show" jao-player-level-cap)]
         ["Utilities"
          ("c" "reconnect to mpd" jao-player-connect)
          ("N" "next random album" jao-random-album-next)
          ("r" (lambda ()
                 (concat (if jao-random-album-p "dis" "en") "able random album"))
           jao-random-album-toggle)]])

    #+end_src
* Key bindings
  #+begin_src emacs-lisp
    (global-set-key "\C-cj" #'join-line)
    (global-set-key "\C-cq" #'auto-fill-mode)
    (global-set-key "\C-xr\M-w" #'kill-rectangle-save)
    (global-set-key "\C-c\C-z" #'comment-or-uncomment-region)
    (global-set-key "\C-z" #'comment-or-uncomment-region)
  #+end_src
* Last minute (post.el)
  #+begin_src emacs-lisp
    (jao-load-site-el "post")
  #+end_src