[PATCH v2] emacs: show: use interactive instead of current-prefix-arg

[Mark Walters <markwalters1009@gmail.com>]

Currently notmuch-show looks at the prefix-arg directly via
current-prefix-arg. This changes it to use the interactive
specification.

One test (for elide-toggle functionality) set the prefix arg
directly. Update this test to set the new argument directly.
---

This is version 2 of the patches at
id:1381348886-5673-1-git-send-email-markwalters1009@gmail.com The
changes are in fixes in response to Austin's review
id:20131013033157.GE10539@mit.edu and his comments on irc.

Specifically, this updates the doc string for elide-toggle in
notmuch-show and folds the test fix in (so the tests should always
pass)

I can also confirm that C-u RET on an id:-button link does work as
expected (and as currently): opening the appropriate message with
inverted elide behaviour.

Best wishes 

Mark



 emacs/notmuch-show.el |   12 +++++++-----
 emacs/notmuch.el      |    5 +++--
 test/emacs-show       |    3 +--
 3 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
index 5d7e24b..3189dda 100644
--- a/emacs/notmuch-show.el
+++ b/emacs/notmuch-show.el
@@ -1080,15 +1080,17 @@ buttons for a corresponding notmuch search."
 	(make-text-button (first link) (second link)
 			  :type 'notmuch-button-type
 			  'action `(lambda (arg)
-				     (notmuch-show ,(third link)))
+				     (notmuch-show ,(third link) current-prefix-arg))
 			  'follow-link t
 			  'help-echo "Mouse-1, RET: search for this message"
 			  'face goto-address-mail-face)))))
 
 ;;;###autoload
-(defun notmuch-show (thread-id &optional parent-buffer query-context buffer-name)
+(defun notmuch-show (thread-id &optional elide-toggle parent-buffer query-context buffer-name)
   "Run \"notmuch show\" with the given thread ID and display results.
 
+ELIDE-TOGGLE, if non-nil, inverts the default elide behavior.
+
 The optional PARENT-BUFFER is the notmuch-search buffer from
 which this notmuch-show command was executed, (so that the
 next thread from that buffer can be show when done with this
@@ -1102,7 +1104,7 @@ The optional BUFFER-NAME provides the name of the buffer in
 which the message thread is shown. If it is nil (which occurs
 when the command is called interactively) the argument to the
 function is used."
-  (interactive "sNotmuch show: ")
+  (interactive "sNotmuch show: \nP")
   (let ((buffer-name (generate-new-buffer-name
 		      (or buffer-name
 			  (concat "*notmuch-" thread-id "*")))))
@@ -1112,9 +1114,9 @@ function is used."
     (setq notmuch-show-process-crypto notmuch-crypto-process-mime)
     ;; Set the default value for
     ;; `notmuch-show-elide-non-matching-messages' in this buffer. If
-    ;; there is a prefix argument, invert the default.
+    ;; elide-toggle is set, invert the default.
     (setq notmuch-show-elide-non-matching-messages notmuch-show-only-matching-messages)
-    (if current-prefix-arg
+    (if elide-toggle
 	(setq notmuch-show-elide-non-matching-messages (not notmuch-show-elide-non-matching-messages)))
 
     (setq notmuch-show-thread-id thread-id
diff --git a/emacs/notmuch.el b/emacs/notmuch.el
index 0ff248b..7124d0a 100644
--- a/emacs/notmuch.el
+++ b/emacs/notmuch.el
@@ -486,13 +486,14 @@ If BARE is set then do not prefix with \"thread:\""
   "Return a list of authors for the current region"
   (notmuch-search-properties-in-region :subject beg end))
 
-(defun notmuch-search-show-thread ()
+(defun notmuch-search-show-thread (&optional elide-toggle)
   "Display the currently selected thread."
-  (interactive)
+  (interactive "P")
   (let ((thread-id (notmuch-search-find-thread-id))
 	(subject (notmuch-search-find-subject)))
     (if (> (length thread-id) 0)
 	(notmuch-show thread-id
+		      elide-toggle
 		      (current-buffer)
 		      notmuch-search-query-string
 		      ;; Name the buffer based on the subject.
diff --git a/test/emacs-show b/test/emacs-show
index ae70053..fb23db4 100755
--- a/test/emacs-show
+++ b/test/emacs-show
@@ -91,8 +91,7 @@ test_begin_subtest "notmuch-show: elide non-matching messages (w/ prefix arg to
 test_emacs '(let ((notmuch-show-only-matching-messages nil))
 	(notmuch-search "from:lars@seas.harvard.edu and subject:\"Maildir storage\"")
 	(notmuch-test-wait)
-	(let ((current-prefix-arg t))
-	  (notmuch-search-show-thread))
+	(notmuch-search-show-thread t)
 	(notmuch-test-wait)
 	(test-visible-output))'
 test_expect_equal_file OUTPUT $EXPECTED/notmuch-show-elide-non-matching-messages-on
-- 
1.7.9.1