Change indentation in c-ts-mode

init.el

@@ -1888,6 +1888,7 @@ otherwise, call `bibtex-find-text'."
                     (nthcdr 1 rules))))))
 
 ;; c-ts-mode
+(setopt ff-ignore-include t)
 (defun my/find-other-file (&optional in-other-window event)
   "Like `ff-find-other-file', but respect configuration variables.
 IN-OTHER-WINDOW and EVENT are the same as the original command."
@@ -1905,9 +1906,30 @@ EVENT is the same as the original command."
   :after evil
   :hook ((c-ts-mode c++-ts-mode) . my/eglot-if-trusted)
   :init
+  (defun my/-c-ts-in-doc-comment-p (&optional include-end)
+    (when-let ((node (treesit-thing-at-point "comment" 'toplevel))
+               (start (treesit-node-start node))
+               (end (treesit-node-end node)))
+      (and (> (point) (+ start 2))
+           (eql (char-after (+ start 1)) ?*)
+           (memql (char-after (+ start 2)) '(?* ?!))
+           (or include-end
+               (<= (point) (- end 2))))))
+  (defun my/c-ts-newline (&optional arg)
+    "Insert ARG newlines as with `newline'.
+If inside a comment and in multi-line comment mode, act as
+`default-indent-new-line'."
+    (interactive "*P")
+    (when (and arg (< (prefix-numeric-value arg) 0))
+      (user-error "Count cannot be negative"))
+    (if (my/-c-ts-in-doc-comment-p)
+        (dotimes (_ (prefix-numeric-value arg))
+          (default-indent-new-line))
+      (newline arg t)))
   (setq-default c-ts-mode-indent-offset 4)
-  (setopt ff-ignore-include t)
   :config
+  (dolist (sym '(c-ts-mode-map c++-ts-mode-map))
+    (keymap-set (symbol-value sym) "<remap> <newline>" #'my/c-ts-newline))
   (evil-define-key 'normal 'c-ts-mode-map
     "go" #'my/find-other-file
     "gO" #'my/find-other-file-other-window)