babel: single function to execute executable babel elements

* ob.el (org-babel-execute-src-block-maybe): remove check for
    `org-babel-no-eval-on-ctrl-c-ctrl-c'; this is done in the new
    function `org-babel-execute-safely-maybe'

    (org-babel-execute-maybe): new function to execute src blocks
    or lob/call lines.

    (org-babel-execute-safely-maybe): new function to execute src blocks
    or lob/call lines via C-c C-c

    (org-ctrl-c-ctrl-c-hook): remove
    `org-babel-execute-src-block-maybe' and add
    `org-babel-execute-safely-maybe'.

    * ob-lob.el (org-ctrl-c-ctrl-c-hook): remove
    `org-babel-lob-execute-maybe'

    * ob-keys.el (org-babel-key-bindings): New function
    `org-babel-execute-maybe' is bound to C-c C-v e and C-c C-v
    C-e

lisp/ob-keys.el

@@ -52,8 +52,8 @@ functions which are assigned key bindings, and see
     ("\C-p" . org-babel-previous-src-block)
     ("n" . org-babel-next-src-block)
     ("\C-n" . org-babel-next-src-block)
-    ("e" . org-babel-execute-src-block)
-    ("\C-e" . org-babel-execute-src-block)
+    ("e" . org-babel-execute-maybe)
+    ("\C-e" . org-babel-execute-maybe)
     ("o" . org-babel-open-src-block-result)
     ("\C-o" . org-babel-open-src-block-result)
     ("\C-v" . org-babel-expand-src-block)

lisp/ob-lob.el

@@ -77,8 +77,6 @@ if so then run the appropriate source block from the Library."
   (let ((info (org-babel-lob-get-info)))
     (if (nth 0 info) (progn (org-babel-lob-execute info) t) nil)))
 
-(add-hook 'org-ctrl-c-ctrl-c-hook 'org-babel-lob-execute-maybe)
-
 ;;;###autoload
 (defun org-babel-lob-get-info ()
   "Return a Library of Babel function call as a string.

lisp/ob.el

@@ -195,17 +195,26 @@ of potentially harmful code."
       (error "evaluation aborted"))))
 
 ;;;###autoload
+(defun org-babel-execute-safely-maybe ()
+  (unless org-babel-no-eval-on-ctrl-c-ctrl-c
+    (org-babel-execute-maybe)))
+
+(add-hook 'org-ctrl-c-ctrl-c-hook 'org-babel-execute-safely-maybe)
+
+;;;###autoload
+(defun org-babel-execute-maybe ()
+  (interactive)
+  (or (org-babel-execute-src-block-maybe)
+      (org-babel-lob-execute-maybe)))
+
 (defun org-babel-execute-src-block-maybe ()
   "Conditionally execute a source block.
 Detect if this is context for a Babel src-block and if so
 then run `org-babel-execute-src-block'."
   (interactive)
-  (if (not org-babel-no-eval-on-ctrl-c-ctrl-c)
-      (let ((info (org-babel-get-src-block-info)))
-	(if info
-	    (progn (org-babel-execute-src-block current-prefix-arg info) t) nil))
-    nil))
-(add-hook 'org-ctrl-c-ctrl-c-hook 'org-babel-execute-src-block-maybe)
+  (let ((info (org-babel-get-src-block-info)))
+    (if info
+	(progn (org-babel-execute-src-block current-prefix-arg info) t) nil)))
 
 ;;;###autoload
 (defun org-babel-expand-src-block-maybe ()
@@ -298,6 +307,7 @@ can not be resolved.")
 ;;; functions
 (defvar call-process-region)
 ;;;###autoload
+
 (defun org-babel-execute-src-block (&optional arg info params)
   "Execute the current source code block.
 Insert the results of execution into the buffer.  Source code