[PATCH v4 2/6] emacs: notmuch-search-refresh-view: reuse buffer

[Ioan-Adrian Ratiu <adi@adirat.com>]

There's no reason to completely kill a buffer while refreshing its
search results because the buffer name is constant between refreshes
(based on the search query), only its contents may change and notmuch
search kills all local variables, so it's safe to reuse.

Reusing the same buffer also makes it possible to do things like
refreshing a buffer which is not focused or even not shown in any
window - this will be used in the next commits to add auto-refresh
capabilities to all existing notmuch buffers + a function to call
after syncing mail to refresh everything.

Signed-off-by: Ioan-Adrian Ratiu <adi@adirat.com>
---
 emacs/notmuch.el | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/emacs/notmuch.el b/emacs/notmuch.el
index ee1bb54..17a784d 100644
--- a/emacs/notmuch.el
+++ b/emacs/notmuch.el
@@ -985,7 +985,7 @@ the configured default sort order."
 (defun notmuch-search-refresh-view (&rest ignore)
   "Refresh the current view.
 
-Kills the current buffer and runs a new search with the same
+Erases the current buffer and runs a new search with the same
 query string as the current search. If the current thread is in
 the new search results, then point will be placed on the same
 thread. Otherwise, point will be moved to attempt to be in the
@@ -993,8 +993,10 @@ same relative position within the new buffer."
   (let ((target-line (line-number-at-pos))
 	(oldest-first notmuch-search-oldest-first)
 	(target-thread (notmuch-search-find-thread-id 'bare))
-	(query notmuch-search-query-string))
-    (notmuch-bury-or-kill-this-buffer)
+	(query notmuch-search-query-string)
+	(inhibit-read-only t))
+    (remove-overlays)
+    (erase-buffer)
     (notmuch-search query oldest-first target-thread target-line)
     (goto-char (point-min))))
 
-- 
2.10.0