[PATCH v2 4/5] emacs: Bind MIME part commands to "." submap

[Austin Clements <amdragon@MIT.EDU>]

Since the part commands are no longer tied to a button, but can be
applied with point anywhere within a part, bind the part commands
keymap to "." everywhere in the show buffer.  This lets you save or
view parts without having to navigate to the part button, and is
particularly useful for parts that have no button.

This removes the un-prefixed MIME part commands from the part button
keymap, but that's okay because those clashed in annoying ways with
show buffer bindings like "s" for search.  RET on part buttons is
unaffected, which is the most important part button binding.
---
 emacs/notmuch-show.el |   23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
index 0d9a34c..613e666 100644
--- a/emacs/notmuch-show.el
+++ b/emacs/notmuch-show.el
@@ -466,22 +466,10 @@ message at DEPTH in the current thread."
 
 (define-button-type 'notmuch-show-part-button-type
   'action 'notmuch-show-part-button-default
-  'keymap 'notmuch-show-part-button-map
   'follow-link t
   'face 'message-mml
   :supertype 'notmuch-button-type)
 
-(defvar notmuch-show-part-button-map
-  (let ((map (make-sparse-keymap)))
-    (set-keymap-parent map button-map)
-    (define-key map "s" 'notmuch-show-save-part)
-    (define-key map "v" 'notmuch-show-view-part)
-    (define-key map "o" 'notmuch-show-interactively-view-part)
-    (define-key map "|" 'notmuch-show-pipe-part)
-    map)
-  "Submap for button commands")
-(fset 'notmuch-show-part-button-map notmuch-show-part-button-map)
-
 (defun notmuch-show-insert-part-header (nth content-type declared-type &optional name comment)
   (let ((button)
 	(base-label (concat (when name (concat name ": "))
@@ -1202,6 +1190,16 @@ reset based on the original query."
   "Submap for stash commands")
 (fset 'notmuch-show-stash-map notmuch-show-stash-map)
 
+(defvar notmuch-show-part-map
+  (let ((map (make-sparse-keymap)))
+    (define-key map "s" 'notmuch-show-save-part)
+    (define-key map "v" 'notmuch-show-view-part)
+    (define-key map "o" 'notmuch-show-interactively-view-part)
+    (define-key map "|" 'notmuch-show-pipe-part)
+    map)
+  "Submap for part commands")
+(fset 'notmuch-show-part-map notmuch-show-part-map)
+
 (defvar notmuch-show-mode-map
       (let ((map (make-sparse-keymap)))
 	(define-key map "?" 'notmuch-help)
@@ -1244,6 +1242,7 @@ reset based on the original query."
 	(define-key map "$" 'notmuch-show-toggle-process-crypto)
 	(define-key map "<" 'notmuch-show-toggle-thread-indentation)
 	(define-key map "t" 'toggle-truncate-lines)
+	(define-key map "." 'notmuch-show-part-map)
 	map)
       "Keymap for \"notmuch show\" buffers.")
 (fset 'notmuch-show-mode-map notmuch-show-mode-map)
-- 
1.7.10.4