Indicate not downloaded parts in MIME buttons.

Via nnimap-fetch-partial-articles one can tell Gnus to omit fetching
certain parts by default.  Now the MIME buttons in the article buffer
indicate how to fetch the complete message in order to act on those
missing parts.

* lisp/gnus/gnus-art.el (gnus-insert-mime-button): Indicate not
downloaded parts in MIME buttons.

diff --git a/lisp/gnus/gnus-art.el b/lisp/gnus/gnus-art.el
index 6b9610d31212989d8afec4c00c77303a3a273e06..614651afff99c99386a0dfbf254e29f8023536c5 100644 (file)
--- a/lisp/gnus/gnus-art.el
+++ b/lisp/gnus/gnus-art.el
@@ -5833,6 +5833,7 @@ all parts."
             "" "..."))
        (gnus-tmp-length (with-current-buffer (mm-handle-buffer handle)
                           (buffer-size)))
+        (help-echo "mouse-2: toggle the MIME part; down-mouse-3: more options")
        gnus-tmp-type-long b e)
     (when (string-match ".*/" gnus-tmp-name)
       (setq gnus-tmp-name (replace-match "" t t gnus-tmp-name)))
@@ -5841,6 +5842,16 @@ all parts."
                                          (concat "; " gnus-tmp-name))))
     (unless (equal gnus-tmp-description "")
       (setq gnus-tmp-type-long (concat " --- " gnus-tmp-type-long)))
+    (when (zerop gnus-tmp-length)
+      (setq gnus-tmp-type-long
+            (concat
+             gnus-tmp-type-long
+             (substitute-command-keys
+              (concat "\\<gnus-summary-mode-map> (not downloaded, "
+                      "\\[gnus-summary-show-complete-article] to fetch.)"))))
+      (setq help-echo
+            (concat "Type \\[gnus-summary-show-complete-article] "
+                    "to download complete article. " help-echo)))
     (setq b (point))
     (gnus-eval-format
      gnus-mime-button-line-format gnus-mime-button-line-format-alist
@@ -5859,8 +5870,7 @@ all parts."
      'keymap gnus-mime-button-map
      'face gnus-article-button-face
      'follow-link t
-     'help-echo
-     "mouse-2: toggle the MIME part; down-mouse-3: more options")))
+     'help-echo help-echo)))
 
 (defvar gnus-displaying-mime nil)