org-mode/lisp/org-babel-exp.el

103 lines
4.1 KiB
EmacsLisp

;;; org-babel-exp.el --- Exportation of org-babel source blocks
;; Copyright (C) 2009 Eric Schulte
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research
;; Homepage: http://orgmode.org
;; Version: 0.01
;;; License:
;; This program 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, or (at your option)
;; any later version.
;;
;; This program 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; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; for more information see the comments in org-babel.el
;;; Code:
(require 'org-babel)
(require 'org-exp-blocks)
(add-to-list 'org-export-blocks '(src org-babel-exp-src-blocks))
(add-to-list 'org-export-interblocks '(src org-babel-exp-inline-src-blocks))
(defun org-babel-exp-src-blocks (body &rest headers)
"Process src block for export. Depending on the 'export'
headers argument in replace the source code block with...
both ---- the default, display the code and the results
code ---- display the code inside the block but do not process
results - process the block and replace it with the results of
execution
none ----- do not display either code or results upon export"
(interactive)
(unless headers (error "org-babel can't process a source block without knowing the source code"))
(message "org-babel processing...")
(let ((lang (car headers))
(params (org-babel-parse-header-arguments (mapconcat #'identity (cdr headers) " "))))
(org-babel-exp-do-export lang body params)))
(defun org-babel-exp-inline-src-blocks (start end)
"Process inline src blocks between START and END for export.
See `org-babel-exp-src-blocks' for export options, currently the
options and are taken from `org-babel-defualt-inline-header-args'."
(interactive)
(save-excursion
(goto-char start)
(while (and (< (point) end) (re-search-forward org-babel-inline-src-block-regexp end t))
(let* ((info (save-match-data (org-babel-parse-inline-src-block-match)))
(replacement (save-match-data
(org-babel-exp-do-export (first info) (second info) (third info) t))))
(setf end (+ end (- (length replacement)
(+ 6 (length (first info)) (length (second info))))))
(replace-match replacement t t)))))
(defun org-babel-exp-do-export (lang body params &optional inline)
(case (intern (or (cdr (assoc :exports params)) "code"))
('none "")
('code (org-babel-exp-code body lang params inline))
('results (org-babel-exp-results body lang params inline))
('both (concat (org-babel-exp-code body lang params inline)
"\n\n"
(org-babel-exp-results body lang params inline)))))
(defun org-babel-exp-code (body lang params &optional inline)
(if inline
(format "=%s=" body)
(format "#+BEGIN_SRC %s\n%s%s\n#+END_SRC" lang body
(if (string-match "\n$" body) "" "\n"))))
(defun org-babel-exp-results (body lang params &optional inline)
;; I expect there's a good reason why not, but would it be possible
;; to use org-babel-execute-src-block here? [ded]
(let* ((cmd (intern (concat "org-babel-execute:" lang)))
(result
(multiple-value-bind (session vars result-params result-type)
(org-babel-process-params params) (funcall cmd body params)))
(result-as-org (org-babel-result-to-org-string result)))
(if inline
(format "=%s=" result)
(if (stringp result)
(format "#+BEGIN_EXAMPLE\n%s%s\n#+END_EXAMPLE" result
(if (string-match "\n$" body) "" "\n"))
result-as-org))))
(provide 'org-babel-exp)
;;; org-babel-exp.el ends here