Name buffer according to attachment filename (bug#34478).

* lisp/gnus/mm-decode.el (mm-display-external): Name buffer showing
  the attachment according to the attachment's filename, i.e. "*mm*
  <filename>" instead of " *mm*12345".

1 files changed, 4 insertions, 0 deletions

diff --git a/lisp/gnus/mm-decode.el b/lisp/gnus/mm-decode.el
index 2a769fccf54..b689b51d6a5 100644
--- a/lisp/gnus/mm-decode.el
+++ b/lisp/gnus/mm-decode.el
@@ -890,6 +890,7 @@ external if displayed external."
             (when method
               (message "Viewing with %s" method))
             (let ((mm (current-buffer))
+                  (attachment-filename (mm-handle-filename handle))
                   (non-viewer (assq 'non-viewer
                                     (mailcap-mime-info
                                      (mm-handle-media-type handle) t))))
@@ -899,6 +900,9 @@ external if displayed external."
                         (when (and (boundp 'gnus-summary-buffer)
                                    (bufferp gnus-summary-buffer)
                                    (buffer-name gnus-summary-buffer))
+                          (when attachment-filename
+                            (with-current-buffer mm
+                              (rename-buffer (format "*mm* %s" attachment-filename) t)))
                           ;; So that we pop back to the right place, sort of.
                           (switch-to-buffer gnus-summary-buffer)
                           (switch-to-buffer mm))