Add +scratch-buffer

lisp/acdw.el

@@ -386,5 +386,30 @@ the `format' call in a list."
       `(with-eval-after-load ',this
          (+with-eval-after-loads ,rest ,@body)))))
 
+(defun +scratch-buffer (&optional nomode)
+  "Create a new scratch buffer and switch to it.
+If the region is active, paste its contents into the scratch
+buffer.  The scratch buffer inherits the mode of the current
+buffer unless NOMODE is non-nil.  When called interactively,
+NOMODE will be set when called with \\[universal-argument]."
+  (interactive "P")
+  (let* ((mode major-mode)
+         (bufname (generate-new-buffer-name (format "*scratch (%s)*" mode)))
+         (paste (and (region-active-p)
+                     (prog1
+                         (buffer-substring (mark t) (point))
+                       (deactivate-mark)))))
+    (when (and (not nomode)
+               (bound-and-true-p ess-dialect)) ; Not sure what `ess-dialect' is
+      (setq mode (intern-soft (concat ess-dialect "-mode"))))
+    ;; Set up buffer
+    (switch-to-buffer (get-buffer-create bufname))
+    (when (and (not nomode) mode)
+      (ignore-errors (funcall mode)))
+    (insert (format "%s Scratch buffer for %s%s\n\n"
+                    comment-start mode comment-end))
+    (when paste (insert paste))
+    (get-buffer bufname)))
+
 (provide 'acdw)
 ;;; acdw.el ends here