gnus-art.el: Misc improvements for displaying MIME parts

* gnus-art.el (gnus-mm-display-part): Don't put article out of sight
while prompting a user for a file name, etc.
(gnus-mime-display-single): Display part with a common appearance no
matter whether MIME button is omitted or not; don't add duplicate entry
to gnus-article-mime-handle-alist.
(gnus-mime-buttonize-attachments-in-header): Use copied buttons.

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index ed78889..fa46f15 100644 (file)
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,12 @@
+2014-05-09  Katsumi Yamaoka  <yamaoka@jpl.org>
+
+       * gnus-art.el (gnus-mm-display-part): Don't put article out of sight
+       while prompting a user for a file name, etc.
+       (gnus-mime-display-single): Display part with a common appearance no
+       matter whether MIME button is omitted or not; don't add duplicate entry
+       to gnus-article-mime-handle-alist.
+       (gnus-mime-buttonize-attachments-in-header): Use copied buttons.
+
 2014-05-08  Adam Sjøgren  <asjo@koldfront.dk>
 
        * mml2015.el (mml2015-display-key-image): New variable.

diff --git a/lisp/gnus-art.el b/lisp/gnus-art.el
index 8287815..0b6cedf 100644 (file)
--- a/lisp/gnus-art.el
+++ b/lisp/gnus-art.el
@@ -5694,27 +5694,36 @@ all parts."
          (setq point (previous-single-property-change
                       (next-single-property-change point 'gnus-data)
                       'gnus-data))
-         (forward-line)
          (if (mm-handle-displayed-p handle)
              ;; This will remove the part.
              (setq retval (mm-display-part handle))
-           (save-window-excursion
-             (save-restriction
-               ;; FIXME: nothing is displayed in the article buffer
-               ;; while prompting a user for a file name.
-               (narrow-to-region (point)
-                                 (if (eobp) (point) (1+ (point))))
-               (gnus-bind-safe-url-regexp
-                (setq retval (mm-display-part handle)))
-               ;; We narrow to the part itself and
-               ;; then call the treatment functions.
-               (goto-char (point-min))
-               (forward-line 1)
-               (narrow-to-region (point) (point-max))
-               (gnus-treat-article
-                nil id
-                (gnus-article-mime-total-parts)
-                (mm-handle-media-type handle))))))
+           (let ((part (or (and (mm-inlinable-p handle)
+                                (mm-inlined-p handle)
+                                t)
+                           (with-temp-buffer
+                             (gnus-bind-safe-url-regexp
+                              (setq retval (mm-display-part handle)))
+                             (unless (zerop (buffer-size))
+                               (buffer-string))))))
+             (forward-line)
+             (cond ((stringp part)
+                    (save-restriction
+                      (narrow-to-region (point)
+                                        (progn
+                                          (insert part)
+                                          (unless (bolp) (insert "\n"))
+                                          (point)))
+                      (gnus-treat-article nil id
+                                          (gnus-article-mime-total-parts)
+                                          (mm-handle-media-type handle))
+                      (mm-handle-set-undisplayer
+                       handle
+                       `(lambda ()
+                          (let ((inhibit-read-only t))
+                            (delete-region ,(copy-marker (point-min) t)
+                                           ,(point-max-marker)))))))
+                   (part
+                    (mm-display-inline handle))))))
       (goto-char point)
       ;; Toggle the button appearance between `[button]...' and `[button]'.
       (gnus-insert-mime-button handle id (list (mm-handle-displayed-p handle)))
@@ -5986,7 +5995,6 @@ If nil, don't show those extra buttons."
   (let ((type (mm-handle-media-type handle))
        (ignored gnus-ignored-mime-types)
        (not-attachment t)
-       (move nil)
        display text)
     (catch 'ignored
       (progn
@@ -6012,9 +6020,11 @@ If nil, don't show those extra buttons."
            (setq display t)
          (when (equal (mm-handle-media-supertype handle) "text")
            (setq text t)))
-       (let ((id (1+ (length gnus-article-mime-handle-alist)))
+       (let ((id (car (rassq handle gnus-article-mime-handle-alist)))
              beg)
-         (push (cons id handle) gnus-article-mime-handle-alist)
+         (unless id
+           (setq id (1+ (length gnus-article-mime-handle-alist)))
+           (push (cons id handle) gnus-article-mime-handle-alist))
          (when (and display
                     (equal (mm-handle-media-supertype handle) "message"))
            (insert-char
@@ -6026,16 +6036,13 @@ If nil, don't show those extra buttons."
                    (not (gnus-unbuttonized-mime-type-p type))
                    (eq id gnus-mime-buttonized-part-id))
            (gnus-insert-mime-button
-            handle id (list (or display (and not-attachment text))))
-           (gnus-article-insert-newline)
-           ;; Remember modify the number of forward lines.
-           (setq move t))
+            handle id (list (or display (and not-attachment text)))))
+         (gnus-article-insert-newline)
+         (when (or display (and text not-attachment))
+           (forward-line -1))
          (setq beg (point))
          (cond
           (display
-           (when move
-             (forward-line -1)
-             (setq beg (point)))
            (let ((mail-parse-charset gnus-newsgroup-charset)
                  (mail-parse-ignored-charsets
                   (save-excursion (condition-case ()
@@ -6045,9 +6052,6 @@ If nil, don't show those extra buttons."
              (gnus-bind-safe-url-regexp (mm-display-part handle t)))
            (goto-char (point-max)))
           ((and text not-attachment)
-           (when move
-             (forward-line -1)
-             (setq beg (point)))
            (gnus-article-insert-newline)
            (mm-display-inline handle)
            (goto-char (point-max))))
@@ -6335,7 +6339,7 @@ in the body.  Use `gnus-header-face-alist' to highlight buttons."
                        (setcar handle (caar handle))))
                    flat)
              flat))))
-      (let ((case-fold-search t) buttons st)
+      (let ((case-fold-search t) buttons st handle)
        (save-excursion
          (save-restriction
            (widen)
@@ -6372,7 +6376,9 @@ in the body.  Use `gnus-header-face-alist' to highlight buttons."
                (dolist (button (nreverse buttons))
                  (setq st (point))
                  (insert " ")
-                 (gnus-insert-mime-button (cdr button) (car button))
+                 (mm-handle-set-undisplayer
+                  (setq handle (copy-sequence (cdr button))) nil)
+                 (gnus-insert-mime-button handle (car button))
                  (skip-chars-backward "\t\n ")
                  (delete-region (point) (point-max))
                  (when (> (current-column) (window-width))