[PATCH] emacs: Fix `notmuch-show-rewind' in the presence of invisible text

[dme at dme.org]

From: David Edmondson <dme at dme.org>

When determining whether or not to re-align the head of the current
message with the top of the window, use `count-screen-lines' rather
than `count-lines' to allow for invisible text in the preceding
message. When comparing that number of lines against
`next-screen-context-lines', realign if the number of lines of the
previous message visible is 'smaller than or equal to' rather than
just 'smaller than' to improve usability.
---
 emacs/notmuch-show.el |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
index f5de8ae..eb5335f 100644
--- a/emacs/notmuch-show.el
+++ b/emacs/notmuch-show.el
@@ -833,8 +833,8 @@ any effects from previous calls to
       ;; If a small number of lines from the previous message are
       ;; visible, realign so that the top of the current message is at
       ;; the top of the screen.
-      (if (< (count-lines (window-start) (notmuch-show-message-top))
-	     next-screen-context-lines)
+      (if (<= (count-screen-lines (window-start) start-of-message)
+	      next-screen-context-lines)
 	  (progn
 	    (goto-char (notmuch-show-message-top))
 	    (notmuch-show-message-adjust)))
-- 
1.7.0