emacs: add impatient-mode

home-manager/modules/emacs/config.org

@@ -1108,6 +1108,24 @@ Prefer local packages from =node_modules= to global ones
     (markdown-mode . lsp-deferred))
 #+end_src
 
+[[https://github.com/skeeto/impatient-mode][impatient-mode]] live renders HTML, but it can be made to work with Markdown with a custom filter
+
+#+begin_src emacs-lisp
+  (use-package impatient-mode
+    :after markdown-mode
+    :config
+    (imp-set-user-filter 'markdown-filter))
+
+    (defun markdown-filter (buffer)
+      (princ
+       (with-temp-buffer
+         (let ((tmpname (buffer-name)))
+           (set-buffer buffer)
+           (set-buffer (markdown tmpname)) ; the function markdown is in `markdown-mode.el'
+           (buffer-string)))
+       (current-buffer)))
+    #+end_src
+
 *** Elixir
 
 Add support for Elixir with [[https://github.com/elixir-editors/emacs-elixir][elixir-mode]]. The =elixir-format= hook sets up the correct formatter configuration when in a =projectile= project.