> On Mon, 06 Aug 2012, Michal Nazarewicz <mpn@google.com> wrote:
>> @@ -1374,9 +1382,11 @@ current thread."
>>    "Are the headers of the current message visible?"
>>    (notmuch-show-get-prop :headers-visible))
>>  
>> -(defun notmuch-show-mark-read ()
>> -  "Mark the current message as read."
>> -  (notmuch-show-tag-message "-unread"))
>> +(defun notmuch-show-mark-read (&optional force)
>> +  "Mark the current message as read if FORCE or
>> +`notmuch-show-auto-mark-read' is non-nil."
>> +  (when (or force notmuch-show-auto-mark-read)
>> +    (notmuch-show-tag-message "-unread")))

Mark Walters <markwalters1009@gmail.com> writes:
> As an alternative approach would allowing a list of tags (or even tag
> changes) to apply when a message is "read" do what you want and be more
> flexible?

Something like the following (not tested)?

From: Michal Nazarewicz <mina86@mina86.com>
Date: Mon, 6 Aug 2012 15:31:20 +0200
Subject: [PATCH] notmuch-show: add notmuch-show-mark-read-tags option

The `notmuch-show-mark-read-tags' lists tags that are to be applied when
message is read.  By default, the only value is "-unread" which will remove
the unread tag.  Among other uses, this variable can be used to stop
notmuch-show from modifying tags when message is shown (by setting the
variable to an empty list).
---
 emacs/notmuch-show.el |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
index dcfc190..92a4beb 100644
--- a/emacs/notmuch-show.el
+++ b/emacs/notmuch-show.el
@@ -183,6 +183,13 @@ provided with an MLA argument nor `completing-read' input."
 	     notmuch-show-stash-mlarchive-link-alist))
   :group 'notmuch-show)
 
+(defcustom notmuch-show-mark-read-tags '("-unread")
+  "List of tags to apply when message is read, ie. shown in notmuch-show
+buffer."
+  :type '(repeat string)
+  :group 'notmuch-show)
+
+
 (defmacro with-current-notmuch-show-message (&rest body)
   "Evaluate body with current buffer set to the text of current message"
   `(save-excursion
@@ -1383,8 +1390,9 @@ current thread."
   (notmuch-show-get-prop :headers-visible))
 
 (defun notmuch-show-mark-read ()
-  "Mark the current message as read."
-  (notmuch-show-tag-message "-unread"))
+  "Apply `notmuch-show-mark-read-tags' to the message."
+  (when notmuch-show-mark-read-tags
+    (apply notmuch-show-tag-message notmuch-show-mark-read-tags)))
 
 ;; Functions for getting attributes of several messages in the current
 ;; thread.

-- 
Best regards,                                         _     _
.o. | Liege of Serenely Enlightened Majesty of      o' \,=./ `o
..o | Computer Science,  Michał “mina86” Nazarewicz    (o o)
ooo +----<email/xmpp: mpn@google.com>--------------ooO--(_)--Ooo--