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;;; ob-lob.el --- functions supporting the Library of Babel
;; Copyright (C) 2009-2012 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; Dan Davison
;; Keywords: literate programming, reproducible research
;; Homepage: http://orgmode.org
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Code:
(eval-when-compile
(require 'cl))
(require 'ob)
(require 'ob-table)
(declare-function org-babel-in-example-or-verbatim "ob-exp" nil)
(defvar org-babel-library-of-babel nil
"Library of source-code blocks.
This is an association list. Populate the library by adding
files to `org-babel-lob-files'.")
(defcustom org-babel-lob-files '()
"Files used to populate the `org-babel-library-of-babel'.
To add files to this list use the `org-babel-lob-ingest' command."
:group 'org-babel
:type 'list)
(defvar org-babel-default-lob-header-args '((:exports . "results"))
"Default header arguments to use when exporting #+lob/call lines.")
;;;###autoload
(defun org-babel-lob-ingest (&optional file)
"Add all named source-blocks defined in FILE to
`org-babel-library-of-babel'."
(interactive "fFile: ")
(let ((lob-ingest-count 0))
(org-babel-map-src-blocks file
(let* ((info (org-babel-get-src-block-info 'light))
(source-name (nth 4 info)))
(when source-name
(setq source-name (intern source-name)
org-babel-library-of-babel
(cons (cons source-name info)
(assq-delete-all source-name org-babel-library-of-babel))
lob-ingest-count (1+ lob-ingest-count)))))
(message "%d src block%s added to Library of Babel"
lob-ingest-count (if (> lob-ingest-count 1) "s" ""))
lob-ingest-count))
(defconst org-babel-block-lob-one-liner-regexp
(concat
"^\\([ \t]*\\)#\\+call:[ \t]+\\([^\(\)\n]+?\\)\\(\\[\\(.*\\)\\]\\|\\(\\)\\)"
"\(\\([^\n]*\\)\)\\(\\[.+\\]\\|\\)[ \t]*\\(\\([^\n]*\\)\\)?")
"Regexp to match non-inline calls to predefined source block functions.")
(defconst org-babel-inline-lob-one-liner-regexp
(concat
"\\([^\n]*\\)call_\\([^\(\)\n]+?\\)\\(\\[\\(.*\\)\\]\\|\\(\\)\\)"
"\(\\([^\n]*\\)\)\\(\\[\\(.*?\\)\\]\\)?")
"Regexp to match inline calls to predefined source block functions.")
(defconst org-babel-lob-one-liner-regexp
(concat "\\(" org-babel-block-lob-one-liner-regexp
"\\|" org-babel-inline-lob-one-liner-regexp "\\)")
"Regexp to match calls to predefined source block functions.")
;; functions for executing lob one-liners
;;;###autoload
(defun org-babel-lob-execute-maybe ()
"Execute a Library of Babel source block, if appropriate.
Detect if this is context for a Library Of Babel source block and
if so then run the appropriate source block from the Library."
(interactive)
(let ((info (org-babel-lob-get-info)))
(if (and (nth 0 info) (not (org-babel-in-example-or-verbatim)))
(progn (org-babel-lob-execute info) t)
nil)))
;;;###autoload
(defun org-babel-lob-get-info ()
"Return a Library of Babel function call as a string."
(flet ((nonempty (a b)
(let ((it (match-string a)))
(if (= (length it) 0) (match-string b) it))))
(let ((case-fold-search t))
(save-excursion
(beginning-of-line 1)
(when (looking-at org-babel-lob-one-liner-regexp)
(append
(mapcar #'org-babel-clean-text-properties
(list
(format "%s%s(%s)%s"
(nonempty 3 12)
(if (not (= 0 (length (nonempty 5 13))))
(concat "[" (nonempty 5 13) "]") "")
(or (nonempty 7 16) "")
(or (nonempty 8 19) ""))
(nonempty 9 18)))
(list (length (if (= (length (match-string 12)) 0)
(match-string 2) (match-string 11))))))))))
(defun org-babel-lob-execute (info)
"Execute the lob call specified by INFO."
(let ((params (org-babel-process-params
(org-babel-merge-params
org-babel-default-header-args
(org-babel-params-from-properties)
(org-babel-parse-header-arguments
(org-babel-clean-text-properties
(concat ":var results="
(mapconcat #'identity (butlast info) " "))))))))
(org-babel-execute-src-block
nil (list "emacs-lisp" "results" params nil nil (nth 2 info)))))
(provide 'ob-lob)
;;; ob-lob.el ends here
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