[PATCH 2/4] emacs: tree: bind o to toggle sort order

[Mark Walters]

---
 emacs/notmuch-tree.el | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/emacs/notmuch-tree.el b/emacs/notmuch-tree.el
index 8b6cd51..6afed76 100644
--- a/emacs/notmuch-tree.el
+++ b/emacs/notmuch-tree.el
@@ -194,6 +194,10 @@ (defvar notmuch-tree-message-buffer nil
 (make-variable-buffer-local 'notmuch-tree-message-buffer)
 (put 'notmuch-tree-message-buffer 'permanent-local t)
 
+(defvar notmuch-tree-oldest-first nil
+  "Controls whether to sort oldest-first or not")
+(make-variable-buffer-local 'notmuch-tree-oldest-first)
+
 (defun notmuch-tree-to-message-pane (func)
   "Execute FUNC in message pane.
 
@@ -265,6 +269,7 @@ (defvar notmuch-tree-mode-map
     (define-key map "A" 'notmuch-tree-archive-thread)
     (define-key map "a" 'notmuch-tree-archive-message-then-next)
     (define-key map "=" 'notmuch-tree-refresh-view)
+    (define-key map "o" 'notmuch-tree-toggle-order)
     (define-key map "z" 'notmuch-tree-to-tree)
     (define-key map "n" 'notmuch-tree-next-matching-message)
     (define-key map "p" 'notmuch-tree-prev-matching-message)
@@ -562,6 +567,18 @@ (defun notmuch-tree-refresh-view ()
 			 query-context
 			 target)))
 
+(defun notmuch-tree-toggle-order ()
+  "Toggle the current search order.
+
+By default, the threads in `notmuch-tree' are displayed
+reverse-chronological order (newest thread at the beginning of
+the buffer).
+
+This command toggles the sort order for the current search."
+  (interactive)
+  (setq notmuch-tree-oldest-first (not notmuch-tree-oldest-first))
+  (notmuch-tree-refresh-view))
+
 (defun notmuch-tree-thread-top ()
   (when (notmuch-tree-get-message-properties)
     (while (not (or (notmuch-tree-get-prop :first) (eobp)))
@@ -872,7 +889,11 @@ (defun notmuch-tree-worker (basic-query &optional query-context target open-targ
     (let ((proc (notmuch-start-notmuch
 		 "notmuch-tree" (current-buffer) #'notmuch-tree-process-sentinel
 		 "show" "--body=false" "--format=sexp"
-		 message-arg search-args))
+		 message-arg
+		 (if oldest-first
+			 "--sort=oldest-first"
+		       "--sort=newest-first")
+		 search-args))
 	  ;; Use a scratch buffer to accumulate partial output.
 	  ;; This buffer will be killed by the sentinel, which
 	  ;; should be called no matter how the process dies.
-- 
2.1.4