[PATCH] emacs: add function to toggle display of all multipart/alternative parts

diff --git a/a6/253fd61c692aec155d5cf4b33ba12457bcdae3 b/a6/253fd61c692aec155d5cf4b33ba12457bcdae3
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+From: Jani Nikula <jani@nikula.org>\r
+To: notmuch@notmuchmail.org\r
+Subject: [PATCH] emacs: add function to toggle display of all\r
+       multipart/alternative parts\r
+Date: Fri, 15 Jun 2012 18:55:51 +0300\r
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+\r
+Add function notmuch-show-toggle-multipart-alternative to make\r
+notmuch-show-all-multipart/alternative-parts buffer local, toggle its\r
+value in the buffer, and redisplay the thread with either all or\r
+preferred alternative parts expanded.\r
+\r
+A small wrinkle is that in order to make the variable survive\r
+notmuch-show-refresh-view (which is required for expanding/collapsing\r
+the parts, but ends up calling kill-all-local-variables through\r
+notmuch-show-mode) it is necessary to give it the permanent-local\r
+property.\r
+---\r
+ emacs/notmuch-show.el |   11 +++++++++++\r
+ 1 file changed, 11 insertions(+)\r
+\r
+diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el\r
+index 36cad93..9c177d9 100644\r
+--- a/emacs/notmuch-show.el\r
++++ b/emacs/notmuch-show.el\r
+@@ -99,6 +99,17 @@ any given message."\r
+   :type 'boolean\r
+   :group 'notmuch-show)\r
+ \r
++(defun notmuch-show-toggle-multipart-alternative ()\r
++  "Toggle `notmuch-show-all-multipart/alternative-parts' in the buffer."\r
++  (interactive)\r
++  (unless (local-variable-p 'notmuch-show-all-multipart/alternative-parts)\r
++    (make-local-variable 'notmuch-show-all-multipart/alternative-parts)\r
++    ;; Make it permanently local to survive notmuch-show-refresh-view.\r
++    (put 'notmuch-show-all-multipart/alternative-parts 'permanent-local t))\r
++  (setq notmuch-show-all-multipart/alternative-parts\r
++      (not notmuch-show-all-multipart/alternative-parts))\r
++  (notmuch-show-refresh-view))\r
++\r
+ (defcustom notmuch-show-indent-messages-width 1\r
+   "Width of message indentation in threads.\r
+ \r
+-- \r
+1.7.9.5\r
+\r