[PATCH v4 4/7] emacs: help: split out notmuch-describe-key as a function

diff --git a/1c/54be9f951952e785f4f8874e4ea26dfe0daf98 b/1c/54be9f951952e785f4f8874e4ea26dfe0daf98
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+       Tue, 12 Nov 2013 12:11:11 -0800 (PST)\r
+From: Mark Walters <markwalters1009@gmail.com>\r
+To: notmuch@notmuchmail.org\r
+Subject: [PATCH v4 4/7] emacs: help: split out notmuch-describe-key as a\r
+       function\r
+Date: Tue, 12 Nov 2013 20:10:56 +0000\r
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+\r
+The actual documentation function notmuch-describe-keymap was getting\r
+rather complicated so split out the code for a single key into its own\r
+function notmuch-describe-key.\r
+---\r
+ emacs/notmuch-lib.el |   42 +++++++++++++++++++++++++-----------------\r
+ 1 files changed, 25 insertions(+), 17 deletions(-)\r
+\r
+diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el\r
+index dde636a..33790e2 100644\r
+--- a/emacs/notmuch-lib.el\r
++++ b/emacs/notmuch-lib.el\r
+@@ -237,6 +237,30 @@ This is basically just `format-kbd-macro' but we also convert ESC to M-."\r
+       "M-"\r
+       (concat desc " "))))\r
+ \r
++\r
++(defun notmuch-describe-key (actual-key binding prefix ua-keys tail)\r
++  "Prepend cons cells describing prefix-arg ACTUAL-KEY and ACTUAL-KEY to TAIL\r
++\r
++It does not prepend if ACTUAL-KEY is already listed in TAIL."\r
++  (let ((key-string (concat prefix (format-kbd-macro actual-key))))\r
++    ;; We don't include documentation if the key-binding is\r
++    ;; over-ridden. Note, over-riding a binding automatically hides the\r
++    ;; prefixed version too.\r
++    (unless (assoc key-string tail)\r
++      (when (and ua-keys (symbolp binding)\r
++               (get binding 'notmuch-prefix-doc))\r
++      ;; Documentation for prefixed command\r
++      (let ((ua-desc (key-description ua-keys)))\r
++        (push (cons (concat ua-desc " " prefix (format-kbd-macro actual-key))\r
++                    (get binding 'notmuch-prefix-doc))\r
++              tail)))\r
++      ;; Documentation for command\r
++      (push (cons key-string\r
++                (or (and (symbolp binding) (get binding 'notmuch-doc))\r
++                    (notmuch-documentation-first-line binding)))\r
++          tail)))\r
++    tail)\r
++\r
+ (defun notmuch-describe-keymap (keymap ua-keys &optional prefix tail)\r
+   "Return a list of cons cells, each describing one binding in KEYMAP.\r
+ \r
+@@ -256,23 +280,7 @@ prefix argument.  PREFIX and TAIL are used internally."\r
+                 (notmuch-describe-keymap\r
+                  binding ua-keys (notmuch-prefix-key-description key) tail)))\r
+          (binding\r
+-          (let ((key-string (concat prefix (format-kbd-macro (vector key)))))\r
+-            ;; We don't include documentation if the key-binding is\r
+-            ;; over-ridden. Note, over-riding a binding\r
+-            ;; automatically hides the prefixed version too.\r
+-            (unless (assoc key-string tail)\r
+-              (when (and ua-keys (symbolp binding)\r
+-                         (get binding 'notmuch-prefix-doc))\r
+-                ;; Documentation for prefixed command\r
+-                (let ((ua-desc (key-description ua-keys)))\r
+-                  (push (cons (concat ua-desc " " prefix (format-kbd-macro (vector key)))\r
+-                              (get binding 'notmuch-prefix-doc))\r
+-                        tail)))\r
+-              ;; Documentation for command\r
+-              (push (cons key-string\r
+-                          (or (and (symbolp binding) (get binding 'notmuch-doc))\r
+-                              (notmuch-documentation-first-line binding)))\r
+-                    tail))))))\r
++          (setq tail (notmuch-describe-key (vector key) binding prefix ua-keys tail)))))\r
+    keymap)\r
+   tail)\r
+ \r
+-- \r
+1.7.9.1\r
+\r