:PROPERTIES:
:ID:       67919dd9-2aa0-4b89-8c96-0441a54e7b03
:END:
#+title: Dirvish
#+filetags: emacs-load

# SPDX-FileCopyrightText: 2022 Richard Brežák <richard@brezak.sk>
#
# SPDX-License-Identifier: LGPL-3.0-or-later

First install [[https://github.com/alexluigit/dirvish][dirvish]], a improved version of dired.

#+begin_src emacs-lisp :tangle no
  (use-package dirvish
    :straight t)
#+end_src

#+begin_src emacs-lisp :noweb yes :exports none
  (use-package dirvish
    :straight t; (dirvish :type git :host nil :repo "https://github.com/alexluigit/dirvish")
    :init
    (dirvish-override-dired-mode)
    :custom
    <<dirvish-quick-access-entries>>
    :config
    ;; (dirvish-peek-mode) ; Preview files in minibuffer
    ;; (dirvish-side-follow-mode) ; similar to `treemacs-follow-mode'
    (setq dirvish-mode-line-format
          '(:left (sort symlink) :right (omit yank index)))
    <<dirvish-attributes>>
    (setq delete-by-moving-to-trash t)
    (setq dired-listing-switches
          "-l --all --human-readable --group-directories-first --no-group")
    <<dirvish-side-obey-display-actions-fix>>
    :bind ; Bind `dirvish|dirvish-side|dirvish-dwim' as you see fit
    <<dirvish-bindings>>)
#+end_src

Add frequently visited diretories, they're accessible from the ~dirvish-mode-map~ under the prefix ~a~.

#+name: dirvish-quick-access-entries
#+begin_src emacs-lisp :tangle no
  (dirvish-quick-access-entries ; It's a custom option, `setq' won't work
   '(("h" "~/"                          "Home")
     ("d" "~/Downloads/"                "Downloads")
     ("m" "/mnt/"                       "Drives")
     ("t" "~/.local/share/Trash/files/" "TrashCan")
     ("r" "~/roam/")
     ("s" "~/sync")))
#+end_src

Enable more attributes in dirvish buffers.

#+name: dirvish-attributes
#+begin_src emacs-lisp :tangle no
  (setq dirvish-attributes
        '(nerd-icons file-time file-size collapse subtree-state vc-state git-msg))
#+end_src

#+begin_src emacs-lisp
  (defun dirvish-fd-projectile ()
    (interactive)
    (funcall-interactively #'dirvish-fd (projectile-project-root) nil))
#+end_src

Next fill up the ~dirvish-mode-map~ and make dirvish reachable under the ~C-c d~ prefix.

#+name: dirvish-bindings
#+begin_src emacs-lisp :tangle no
  (("C-c d f" . dirvish-fd-projectile)
   ("C-c d s" . dirvish-side)
   :map dirvish-mode-map ; Dirvish inherits `dired-mode-map'
   ("a"   . dirvish-quick-access)
   ("f"   . dirvish-file-info-menu)
   ("y"   . dirvish-yank-menu)
   ("N"   . dirvish-narrow)
   ("^"   . dirvish-history-last)
   ("h"   . dirvish-history-jump) ; remapped `describe-mode'
   ("s"   . dirvish-quicksort)    ; remapped `dired-sort-toggle-or-edit'
   ("v"   . dirvish-vc-menu)      ; remapped `dired-view-file'
   ("w"   . dirvish-apply-wallpaper)
   ("TAB" . dirvish-subtree-toggle)
   ("M-f" . dirvish-history-go-forward)
   ("M-b" . dirvish-history-go-backward)
   ("M-l" . dirvish-ls-switches-menu)
   ("M-m" . dirvish-mark-menu)
   ("M-t" . dirvish-layout-toggle)
   ("M-s" . dirvish-setup-menu)
   ("M-e" . dirvish-emerge-menu)
   ("M-j" . dirvish-fd-jump))
#+end_src

Dirvish has an issue with ~switch-to-buffer-obey-display-actions~, so advise ~switch-to-buffer~ and force override ~switch-to-buffer-obey-display-actions~ to ~nil~ when dealing with a Dirvish side buffer.

#+name: dirvish-side-obey-display-actions-fix
#+begin_src emacs-lisp :tangle no
  (defun dirvish-side-buffer-p (buffer-or-name)
    "Return t if BUFFER-OR-NAME is a dirvish buffer and a side buffer."
    (when (get-buffer buffer-or-name)
      (with-current-buffer buffer-or-name
        (let ((dv (dirvish-curr)))
          (if (and dv (member 'side (dv-type dv)))
              t
            nil)))))

  (defun dirvish-ignore-display-buffer (original-function buffer-or-name &rest original-arguments)
    (let ((switch-to-buffer-obey-display-actions (not (dirvish-side-buffer-p buffer-or-name))))
      (apply original-function buffer-or-name original-arguments)))
  (advice-add 'switch-to-buffer :around #'dirvish-ignore-display-buffer)
#+end_src

In sideview Dirvish buffers, I want the ~listing-switches~ to exclude ~--all~ and instead use ~--almost-all~, that causes ~..~ and ~.~ to be omitted.

#+begin_src emacs-lisp
  (defun dirvish-side-disable-listing-all (&rest args)
    (with-selected-window (dv-root-window dirvish--this)
      (setq dired-actual-switches (string-replace "--all" "--almost-all" dired-actual-switches))
      (revert-buffer)))
  (advice-add 'dirvish-side--new :after #'dirvish-side-disable-listing-all)
#+end_src

In sideview Dirvish buffers, I don't want ~RET~ to narrow to a directory, it makes no sense in my opinion.

#+begin_src emacs-lisp
  (defun dirvish-side-disable-open-folder (original-function &optional entry)
    (let ((entry (or entry (dired-get-filename nil t))))
      (if (dirvish-side-buffer-p (current-buffer))
          (unless (and entry (file-directory-p entry))
            (funcall original-function entry))
        (funcall original-function entry))))
  (advice-add 'dirvish-find-entry-a :around #'dirvish-side-disable-open-folder)
#+end_src

#+begin_src emacs-lisp
  (defun dirvish-apply-wallpaper ()
    (interactive)
    (let ((filename (or (dired-get-filename) (completing-read))))
      (async-shell-command (format "ln -sf %s /nix/persist/home/main/.config/wallpaper && systemctl restart --user wallpaper" filename))))

  (defun dirvish-side-obey-display-actions (original-function &rest original-arguments)
    (let ((switch-to-buffer-obey-display-actions nil))
      (apply original-function original-arguments)))
  (advice-add 'dirvish-side :around #'dirvish-side-obey-display-actions)
#+end_src