[PATCH v4 7/8] emacs: Fix navigation of multi-line search result formats

[Austin Clements <amdragon@MIT.EDU>]

At this point, the only remaining functions that don't support
multi-line search result formats are the thread navigation functions.
This patch fixes that by rewriting them in terms of
notmuch-search-result-{beginning,end}.

This changes the behavior of notmuch-search-previous-thread slightly
so that if point isn't at the beginning of a result, it first moves
point to the beginning of the result.
---
 emacs/notmuch.el |   13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/emacs/notmuch.el b/emacs/notmuch.el
index d092528..fd1836f 100644
--- a/emacs/notmuch.el
+++ b/emacs/notmuch.el
@@ -293,18 +293,25 @@ For a mouse binding, return nil."
 (defun notmuch-search-next-thread ()
   "Select the next thread in the search results."
   (interactive)
-  (forward-line 1))
+  (when (notmuch-search-get-result (notmuch-search-result-end))
+    (goto-char (notmuch-search-result-end))))
 
 (defun notmuch-search-previous-thread ()
   "Select the previous thread in the search results."
   (interactive)
-  (forward-line -1))
+  (if (notmuch-search-get-result)
+      (unless (bobp)
+	(goto-char (notmuch-search-result-beginning (- (point) 1))))
+    ;; We must be past the end; jump to the last result
+    (notmuch-search-last-thread)))
 
 (defun notmuch-search-last-thread ()
   "Select the last thread in the search results."
   (interactive)
   (goto-char (point-max))
-  (forward-line -2))
+  (forward-line -2)
+  (let ((beg (notmuch-search-result-beginning)))
+    (when beg (goto-char beg))))
 
 (defun notmuch-search-first-thread ()
   "Select the first thread in the search results."
-- 
1.7.10