[PATCH v2 7/7] emacs: `notmuch-show-toggle-visibility-messages' with prefix arg filte...

diff --git a/4d/2a279eb798afdf6635752844ccdef059d583b2 b/4d/2a279eb798afdf6635752844ccdef059d583b2
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+++ b/4d/2a279eb798afdf6635752844ccdef059d583b2
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+From: Pieter Praet <pieter@praet.org>\r
+To: Notmuch Mail <notmuch@notmuchmail.org>\r
+Subject: [PATCH v2 7/7] emacs: `notmuch-show-toggle-visibility-messages' with\r
+       prefix arg filters by tag\r
+Date: Wed, 22 Feb 2012 19:43:34 +0100\r
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+\r
+* emacs/notmuch-show.el (notmuch-show-toggle-visibility-messages):\r
+  When provided with a prefix arg, prompt the user for a tag.\r
+  Show all messages that have it and hide those that don't.\r
+---\r
+ emacs/notmuch-show.el |   13 ++++++++++---\r
+ 1 files changed, 10 insertions(+), 3 deletions(-)\r
+\r
+diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el\r
+index 82d4265..b5e482b 100644\r
+--- a/emacs/notmuch-show.el\r
++++ b/emacs/notmuch-show.el\r
+@@ -38,6 +38,7 @@\r
+ \r
+ (declare-function notmuch-call-notmuch-process "notmuch" (&rest args))\r
+ (declare-function notmuch-fontify-headers "notmuch" nil)\r
++(declare-function notmuch-select-tag-with-completion "notmuch" (prompt &rest search-terms))\r
+ (declare-function notmuch-read-tag-changes "notmuch" (&optional initial-input &rest search-terms))\r
+ (declare-function notmuch-search-next-thread "notmuch" nil)\r
+ (declare-function notmuch-search-show-thread "notmuch" nil)\r
+@@ -1670,13 +1671,19 @@ (defun notmuch-show-toggle-visibility-message ()\r
+ \r
+ (defun notmuch-show-toggle-visibility-messages ()\r
+   "Toggle the visibility of all messages in the current thread.\r
+-If the current message is visible, hide all messages -- and vice versa."\r
++If the current message is visible, hide all messages -- and vice versa.\r
++\r
++With a prefix argument, prompt for a tag and only show messages which have it."\r
+   (interactive)\r
+-  (let ((visible-p (notmuch-show-message-visible-p)))\r
++  (let ((visible-p (notmuch-show-message-visible-p))\r
++      (filter (if current-prefix-arg\r
++                  (notmuch-select-tag-with-completion "Filter by tag: "))))\r
+     (notmuch-show-mapc\r
+      (lambda () (notmuch-show-message-visible\r
+                (notmuch-show-get-message-properties)\r
+-               (not visible-p)))))\r
++               (if current-prefix-arg\r
++                   (member filter (notmuch-show-get-tags))\r
++                 (not visible-p))))))\r
+ \r
+   ;; Put the current message properly into focus, but don't\r
+   ;; obscure the presence of previous messages in the thread.\r
+-- \r
+1.7.8.1\r
+\r