lisp/org-babel-exp.el

   1 ;;; org-babel-exp.el --- Exportation of org-babel source blocks
   2
   3 ;; Copyright (C) 2009 Eric Schulte
   4
   5 ;; Author: Eric Schulte
   6 ;; Keywords: literate programming, reproducible research
   7 ;; Homepage: http://orgmode.org
   8 ;; Version: 0.01
   9
  10 ;;; License:
  11
  12 ;; This program is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation; either version 3, or (at your option)
  15 ;; any later version.
  16 ;;
  17 ;; This program is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21 ;;
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  25 ;; Boston, MA 02110-1301, USA.
  26
  27 ;;; Commentary:
  28
  29 ;; for more information see the comments in org-babel.el
  30
  31 ;;; Code:
  32 (require 'org-babel)
  33 (require 'org-exp-blocks)
  34 (org-export-blocks-add-block '(src org-babel-exp-src-blocks nil))
  35 (add-to-list 'org-export-interblocks '(src org-babel-exp-inline-src-blocks))
  36
  37 (defun org-babel-exp-src-blocks (body &rest headers)
  38   "Process src block for export.  Depending on the 'export'
  39 headers argument in replace the source code block with...
  40
  41 both ---- display the code and the results
  42
  43 code ---- the default, display the code inside the block but do
  44           not process
  45
  46 results - just like none only the block is run on export ensuring
  47           that it's results are present in the org-mode buffer
  48
  49 none ----- do not display either code or results upon export"
  50   (interactive)
  51   (unless headers (error "org-babel can't process a source block without knowing the source code"))
  52   (message "org-babel-exp processing...")
  53   (let* ((lang (car headers))
  54          (lang-headers (intern (concat "org-babel-default-header-args:" lang)))
  55          (params (org-babel-merge-params
  56                   org-babel-default-header-args
  57                   (org-babel-params-from-properties)
  58                   (if (boundp lang-headers) (eval lang-headers) nil)
  59                   (org-babel-parse-header-arguments
  60                    (mapconcat #'identity (cdr headers) " ")))))
  61     (message "exporting params are %S" params)
  62     (org-babel-exp-do-export lang body params)))
  63
  64 (defun org-babel-exp-inline-src-blocks (start end)
  65   "Process inline src blocks between START and END for export.
  66 See `org-babel-exp-src-blocks' for export options, currently the
  67 options and are taken from `org-babel-defualt-inline-header-args'."
  68   (interactive)
  69   (save-excursion
  70     (goto-char start)
  71     (while (and (< (point) end) (re-search-forward org-babel-inline-src-block-regexp end t))
  72       (let* ((info (save-match-data (org-babel-parse-inline-src-block-match)))
  73              (replacement (save-match-data
  74                             (org-babel-exp-do-export (first info) (second info) (third info) t))))
  75         (setf end (+ end (- (length replacement)
  76                             (+ 6 (length (first info)) (length (second info))))))
  77         (replace-match replacement t t)))))
  78
  79 (defun org-babel-exp-do-export (lang body params &optional inline)
  80   (case (intern (or (cdr (assoc :exports params)) "code"))
  81     ('none "")
  82     ('code (org-babel-exp-code body lang params inline))
  83     ('results (save-excursion
  84                 ;; org-exp-blocks places us at the end of the block
  85                 (re-search-backward org-babel-src-block-regexp nil t)
  86                 (org-babel-execute-src-block) ""))
  87     ('both (concat (org-babel-exp-code body lang params inline)
  88                    "\n\n"
  89                    (org-babel-exp-results body lang params inline)))))
  90
  91 (defun org-babel-exp-code (body lang params &optional inline)
  92   (if inline
  93       (format "=%s=" body)
  94     (format "#+BEGIN_SRC %s\n%s%s\n#+END_SRC" lang body
  95             (if (string-match "\n$" body) "" "\n"))))
  96
  97 (provide 'org-babel-exp)
  98 ;;; org-babel-exp.el ends here