[PATCH 2/2] contrib: pick: fix refresh result

[Mark Walters <markwalters1009@gmail.com>]

The function notmuch-pick-refresh-result (used to update tag changes)
was not quite correct: sometimes it got the choice between the subject
and " ..." wrong. This was always true but the new code often calls
this (when opening a message in the message pane to remove the unread
tag) while the async pick process is still running and this caused
mistakes which made the tests fail.

Thus we store the previous subject with the message.
---
 contrib/notmuch-pick/notmuch-pick.el |   23 +++++++++++++++++------
 1 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/contrib/notmuch-pick/notmuch-pick.el b/contrib/notmuch-pick/notmuch-pick.el
index 9112989..46d9503 100644
--- a/contrib/notmuch-pick/notmuch-pick.el
+++ b/contrib/notmuch-pick/notmuch-pick.el
@@ -264,8 +264,15 @@ Some useful entries are:
 	(msg (notmuch-pick-get-message-properties))
 	(inhibit-read-only t))
     (beginning-of-line)
-    (delete-region (point) (1+ (line-end-position)))
-    (notmuch-pick-insert-msg msg)
+    ;; This is a little tricky: we override
+    ;; notmuch-pick-previous-subject to get the decision between
+    ;; ... and a subject right and it stops notmuch-pick-insert-msg
+    ;; from overwriting the buffer local copy of
+    ;; notmuch-pick-previous-subject if this is called while the
+    ;; buffer is displaying.
+    (let ((notmuch-pick-previous-subject (notmuch-pick-get-prop :previous-subject)))
+      (delete-region (point) (1+ (line-end-position)))
+      (notmuch-pick-insert-msg msg))
     (let ((new-end (line-end-position)))
       (goto-char (if (= init-point end)
 		     new-end
@@ -628,10 +635,14 @@ unchanged ADDRESS if parsing fails."
 
 (defun notmuch-pick-insert-msg (msg)
   "Insert the message MSG according to notmuch-pick-result-format"
-  (dolist (spec notmuch-pick-result-format)
-    (notmuch-pick-insert-field (car spec) (cdr spec) msg))
-  (notmuch-pick-set-message-properties msg)
-  (insert "\n"))
+  ;; We need to save the previous subject as it will get overwritten
+  ;; by the insert-field calls.
+  (let ((previous-subject notmuch-pick-previous-subject))
+    (dolist (spec notmuch-pick-result-format)
+      (notmuch-pick-insert-field (car spec) (cdr spec) msg))
+    (notmuch-pick-set-message-properties msg)
+    (notmuch-pick-set-prop :previous-subject previous-subject)
+    (insert "\n")))
 
 (defun notmuch-pick-goto-and-insert-msg (msg)
   "Insert msg at the end of the buffer. Move point to msg if it is the target"
-- 
1.7.9.1