Support dired-subtree (No icons showed in dired-subtree)

[milanglacier]

example setup

(require 'package)
(setq package-user-dir "~/Downloads/emacs-package-dir")

(setq package-list '(dired-subtree))
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/"))
(package-initialize)

(add-to-list 'load-path "~/Downloads/open-project-fork/nerd-icons.el")
(add-to-list 'load-path "~/Downloads/open-project-fork/nerd-icons-dired")

(unless package-archive-contents
  (package-refresh-contents))

(dolist (package package-list)
  (unless (package-installed-p package)
    (package-install package)))

(require 'nerd-icons)
(require 'nerd-icons-dired)
(require 'dired-subtree)

(add-hook 'dired-mode-hook #'nerd-icons-dired-mode)

(define-key dired-mode-map (kbd "TAB") #'dired-subtree-toggle)

(load-theme 'modus-operandi t)

step to reproduce:

1. open any directory by C-x d
2. move point to a folder and tap TAB key, the subtree is expanded.
3. No icons showed in the subtree.

[zhenhua-wang]

This should add icons to the dired subtrees

  (advice-add 'dired-subtree-toggle :after (lambda ()
                                             (interactive)
                                             (when nerd-icons-dired-mode
                                               (revert-buffer))))

[milanglacier]

This should add icons to the dired subtrees

  (advice-add 'dired-subtree-toggle :after (lambda ()
                                             (interactive)
                                             (when nerd-icons-dired-mode
                                               (revert-buffer))))

Thanks for the insight! This hack works for me!

Using a anonymous function in an advice makes it hard to be removed later, I have made a slightly modification of this piece of code to make it less intrusive:

(defun my:dired-subtree-add-nerd-icons ()
    (interactive)
    (revert-buffer))


(defun my:dired-subtree-toggle-nerd-icons ()
    (when (require 'dired-subtree nil t)
        (if nerd-icons-dired-mode
                (advice-add #'dired-subtree-toggle :after #'my:dired-subtree-add-nerd-icons)
            (advice-remove #'dired-subtree-toggle #'my:dired-subtree-add-nerd-icons))))

(use-package nerd-icons-dired
    :hook ((dired-mode . nerd-icons-dired-mode)
           (nerd-icons-dired-mode . my:dired-subtree-toggle-nerd-icons)))