1 files changed, 59 insertions, 39 deletions

diff --git a/lisp/gnus/mml.el b/lisp/gnus/mml.el
index 6d13d892b5a..3a31349d378 100644
--- a/lisp/gnus/mml.el
+++ b/lisp/gnus/mml.el
@@ -486,7 +486,8 @@ be \"related\" or \"alternate\"."
                  (equal (cdr (assq 'type (car cont))) "text/html"))
         (setq cont (mml-expand-html-into-multipart-related (car cont))))
       (prog1
-          (mm-with-multibyte-buffer
+          (with-temp-buffer
+            (set-buffer-multibyte nil)
             (setq message-options options)
             (cond
              ((and (consp (car cont))
@@ -605,28 +606,38 @@ be \"related\" or \"alternate\"."
                                    (intern (downcase charset))))))
           (if (and (not raw)
                    (member (car (split-string type "/")) '("text" "message")))
+              ;; We have a text-like MIME part, so we need to do
+              ;; charset encoding.
               (progn
                 (with-temp-buffer
-                  (cond
-                   ((cdr (assq 'buffer cont))
-                    (insert-buffer-substring (cdr (assq 'buffer cont))))
-                   ((and filename
-                         (not (equal (cdr (assq 'nofile cont)) "yes")))
-                    (let ((coding-system-for-read coding))
-                      (mm-insert-file-contents filename)))
-                   ((eq 'mml (car cont))
-                    (insert (cdr (assq 'contents cont))))
-                   (t
-                    (save-restriction
-                      (narrow-to-region (point) (point))
-                      (insert (cdr (assq 'contents cont)))
-                      ;; Remove quotes from quoted tags.
-                      (goto-char (point-min))
-                      (while (re-search-forward
-                              "<#!+/?\\(part\\|multipart\\|external\\|mml\\|secure\\)"
-                              nil t)
-                        (delete-region (+ (match-beginning 0) 2)
-                                       (+ (match-beginning 0) 3))))))
+                  (set-buffer-multibyte nil)
+                  ;; First insert the data into the buffer.
+                  (if  (and filename
+                            (not (equal (cdr (assq 'nofile cont)) "yes")))
+                      (mm-insert-file-contents filename)
+                    (insert
+                     (with-temp-buffer
+                       (cond
+                        ((cdr (assq 'buffer cont))
+                         (insert-buffer-substring (cdr (assq 'buffer cont))))
+                        ((eq 'mml (car cont))
+                         (insert (cdr (assq 'contents cont))))
+                        (t
+                         (insert (cdr (assq 'contents cont)))
+                         ;; Remove quotes from quoted tags.
+                         (goto-char (point-min))
+                         (while (re-search-forward
+                                 "<#!+/?\\(part\\|multipart\\|external\\|mml\\|secure\\)"
+                                 nil t)
+                           (delete-region (+ (match-beginning 0) 2)
+                                          (+ (match-beginning 0) 3)))))
+                       (setq charset
+                             (mm-coding-system-to-mime-charset
+                              (detect-coding-region
+                               (point-min) (point-max) t)))
+                       (encode-coding-region (point-min) (point-max)
+                                             charset)
+                       (buffer-string))))
                   (cond
                    ((eq (car cont) 'mml)
                     (let ((mml-boundary (mml-compute-boundary cont))
@@ -667,21 +678,22 @@ be \"related\" or \"alternate\"."
                         ;; insert a "; format=flowed" string unless the
                         ;; user has already specified it.
                         (setq flowed (null (assq 'format cont)))))
-                    ;; Prefer `utf-8' for text/calendar parts.
-                    (if (or charset
-                            (not (string= type "text/calendar")))
-                        (setq charset (mm-encode-body charset))
-                      (let ((mm-coding-system-priorities
-                             (cons 'utf-8 mm-coding-system-priorities)))
-                        (setq charset (mm-encode-body))))
-                    (mm-disable-multibyte)
+                    (unless charset
+                      (setq charset
+                            ;; Prefer `utf-8' for text/calendar parts.
+                            (if (string= type "text/calendar")
+                                'utf-8
+                              (mm-coding-system-to-mime-charset
+                               (detect-coding-region
+                                (point-min) (point-max) t)))))
                     (setq encoding (mm-body-encoding
                                     charset (cdr (assq 'encoding cont))))))
                   (setq coded (buffer-string)))
                 (mml-insert-mime-headers cont type charset encoding flowed)
                 (insert "\n")
                 (insert coded))
-            (mm-with-unibyte-buffer
+            (with-temp-buffer
+              (set-buffer-multibyte nil)
               (cond
                ((cdr (assq 'buffer cont))
                 (insert (string-as-unibyte
@@ -690,11 +702,7 @@ be \"related\" or \"alternate\"."
                ((and filename
                      (not (equal (cdr (assq 'nofile cont)) "yes")))
                 (let ((coding-system-for-read mm-binary-coding-system))
-                  (mm-insert-file-contents filename nil nil nil nil t))
-                (unless charset
-                  (setq charset (mm-coding-system-to-mime-charset
-                                 (mm-find-buffer-file-coding-system
-                                  filename)))))
+                  (mm-insert-file-contents filename nil nil nil nil t)))
                (t
                 (let ((contents (cdr (assq 'contents cont))))
                   (if (multibyte-string-p contents)
@@ -1244,6 +1252,7 @@ If not set, `default-directory' will be used."
 
 (defun mml-minibuffer-read-file (prompt)
   (let* ((completion-ignored-extensions nil)
+         (buffer-file-name nil)
          (file (read-file-name prompt
                                (or mml-default-directory default-directory)
                                nil t)))
@@ -1378,12 +1387,23 @@ content-type, a string of the form \"type/subtype\".  DESCRIPTION
 is a one-line description of the attachment.  The DISPOSITION
 specifies how the attachment is intended to be displayed.  It can
 be either \"inline\" (displayed automatically within the message
-body) or \"attachment\" (separate from the body)."
+body) or \"attachment\" (separate from the body).
+
+If given a prefix interactively, no prompting will be done for
+the TYPE, DESCRIPTION or DISPOSITION values.  Instead defaults
+will be computed and used."
   (interactive
    (let* ((file (mml-minibuffer-read-file "Attach file: "))
-          (type (mml-minibuffer-read-type file))
-          (description (mml-minibuffer-read-description))
-          (disposition (mml-minibuffer-read-disposition type nil file)))
+          (type (if current-prefix-arg
+                    (or (mm-default-file-encoding file)
+                        "application/octet-stream")
+                  (mml-minibuffer-read-type file)))
+          (description (if current-prefix-arg
+                           nil
+                         (mml-minibuffer-read-description)))
+          (disposition (if current-prefix-arg
+                           (mml-content-disposition type file)
+                         (mml-minibuffer-read-disposition type nil file))))
      (list file type description disposition)))
   ;; If in the message header, attach at the end and leave point unchanged.
   (let ((head (unless (message-in-body-p) (point))))