[PATCH v2 4/6] emacs: add optional predicate arg to `notmuch-show-mapc'

diff --git a/0d/68f90c1c37cb259f387ff251e3bfd7edb566fd b/0d/68f90c1c37cb259f387ff251e3bfd7edb566fd
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+From: Pieter Praet <pieter@praet.org>\r
+To: David Bremner <david@tethera.net>,\r
+       Dmitry Kurochkin <dmitry.kurochkin@gmail.com>\r
+Subject: [PATCH v2 4/6] emacs: add optional predicate arg to\r
+       `notmuch-show-mapc'\r
+Date: Fri, 24 Feb 2012 23:30:38 +0100\r
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+\r
+* emacs/notmuch-show.el (notmuch-show-mapc):\r
+\r
+  If provided with optional argument PREDICATE, only call\r
+  FUNCTION if calling PREDICATE returns non-nil.\r
+\r
+  Also correct original docstring: 's/thread/buffer/'.\r
+---\r
+ emacs/notmuch-show.el |   14 ++++++++++----\r
+ 1 files changed, 10 insertions(+), 4 deletions(-)\r
+\r
+diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el\r
+index aa9ccee..6adbdc0 100644\r
+--- a/emacs/notmuch-show.el\r
++++ b/emacs/notmuch-show.el\r
+@@ -1272,13 +1272,19 @@ (defun notmuch-show-goto-message-previous ()\r
+     (notmuch-show-move-to-message-top)\r
+     t))\r
+ \r
+-(defun notmuch-show-mapc (function)\r
+-  "Iterate through all messages in the current thread with\r
++(defun notmuch-show-mapc (function &optional predicate)\r
++  "Iterate through all messages in the current buffer with\r
+ `notmuch-show-goto-message-next' and call FUNCTION for side\r
+-effects."\r
++effects.\r
++\r
++If provided with optional argument PREDICATE, only call\r
++FUNCTION if calling PREDICATE returns non-nil."\r
+   (save-excursion\r
+     (goto-char (point-min))\r
+-    (loop do (funcall function)\r
++    (loop do (if predicate\r
++               (if (funcall predicate)\r
++                   (funcall function))\r
++             (funcall function))\r
+         while (notmuch-show-goto-message-next))))\r
+ \r
+ ;; Functions relating to the visibility of messages and their\r
+-- \r
+1.7.8.1\r
+\r