[Patch v2] emacs: add pipe attachment command

[Mark Walters]

Allow the user to pipe the attachment somewhere. Bound to '|' on the
attachment button.
---

Thanks for the review!

Here is a rebased to current master version of the previous patch: no
other changes.

Best wishes

Mark

 emacs/notmuch-show.el |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
index d318430..b6a1980 100644
--- a/emacs/notmuch-show.el
+++ b/emacs/notmuch-show.el
@@ -453,6 +453,7 @@ message at DEPTH in the current thread."
     (define-key map "s" 'notmuch-show-part-button-save)
     (define-key map "v" 'notmuch-show-part-button-view)
     (define-key map "o" 'notmuch-show-part-button-interactively-view)
+    (define-key map "|" 'notmuch-show-part-button-pipe)
     map)
   "Submap for button commands")
 (fset 'notmuch-show-part-button-map notmuch-show-part-button-map)
@@ -524,6 +525,28 @@ message at DEPTH in the current thread."
     (let ((handle (mm-make-handle (current-buffer) (list content-type))))
       (mm-interactively-view-part handle))))
 
+(defun notmuch-show-pipe-part (message-id nth &optional filename content-type)
+  (notmuch-with-temp-part-buffer message-id nth
+    (let ((handle (mm-make-handle (current-buffer) (list content-type))))
+      (mm-pipe-part handle))))
+
+(defun notmuch-show-mm-display-part-inline (msg part nth content-type)
+  "Use the mm-decode/mm-view functions to display a part in the
+current buffer, if possible."
+  (let ((display-buffer (current-buffer)))
+    (with-temp-buffer
+      (let* ((charset (plist-get part :content-charset))
+	     (handle (mm-make-handle (current-buffer) `(,content-type (charset . ,charset)))))
+	;; If the user wants the part inlined, insert the content and
+	;; test whether we are able to inline it (which includes both
+	;; capability and suitability tests).
+	(when (mm-inlined-p handle)
+	  (insert (notmuch-get-bodypart-content msg part nth notmuch-show-process-crypto))
+	  (when (mm-inlinable-p handle)
+	    (set-buffer display-buffer)
+	    (mm-display-part handle)
+	    t))))))
+
 (defun notmuch-show-multipart/*-to-list (part)
   (mapcar (lambda (inner-part) (plist-get inner-part :content-type))
 	  (plist-get part :content)))
@@ -1874,6 +1897,10 @@ the user (see `notmuch-show-stash-mlarchive-link-alist')."
   (interactive)
   (notmuch-show-part-button-internal button #'notmuch-show-interactively-view-part))
 
+(defun notmuch-show-part-button-pipe (&optional button)
+  (interactive)
+  (notmuch-show-part-button-internal button #'notmuch-show-pipe-part))
+
 (defun notmuch-show-part-button-internal (button handler)
   (let ((button (or button (button-at (point)))))
     (if button
-- 
1.7.9.1