lisp/ob-asymptote.el

   1 ;;; ob-asymptote.el --- org-babel functions for asymptote evaluation
   2
   3 ;; Copyright (C) 2009, 2010 Free Software Foundation, Inc.
   4
   5 ;; Author: Eric Schulte
   6 ;; Keywords: literate programming, reproducible research
   7 ;; Homepage: http://orgmode.org
   8 ;; Version: 7.4
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs 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 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs 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.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;; Org-Babel support for evaluating asymptote source code.
  28 ;;
  29 ;; This differs from most standard languages in that
  30 ;;
  31 ;; 1) there is no such thing as a "session" in asymptote
  32 ;;
  33 ;; 2) we are generally only going to return results of type "file"
  34 ;;
  35 ;; 3) we are adding the "file" and "cmdline" header arguments, if file
  36 ;;    is omitted then the -V option is passed to the asy command for
  37 ;;    interactive viewing
  38
  39 ;;; Requirements:
  40
  41 ;; - The asymptote program :: http://asymptote.sourceforge.net/
  42 ;;
  43 ;; - asy-mode :: Major mode for editing asymptote files
  44
  45 ;;; Code:
  46 (require 'ob)
  47 (eval-when-compile (require 'cl))
  48
  49 (declare-function orgtbl-to-generic "org-table" (table params))
  50 (declare-function org-combine-plists "org" (&rest plists))
  51
  52 (add-to-list 'org-babel-tangle-lang-exts '("asymptote" . "asy"))
  53
  54 (defvar org-babel-default-header-args:asymptote
  55   '((:results . "file") (:exports . "results"))
  56   "Default arguments when evaluating an Asymptote source block.")
  57
  58 (defun org-babel-execute:asymptote (body params)
  59   "Execute a block of Asymptote code.
  60 This function is called by `org-babel-execute-src-block'."
  61   (let* ((result-params (split-string (or (cdr (assoc :results params)) "")))
  62          (out-file (cdr (assoc :file params)))
  63          (format (or (and out-file
  64                           (string-match ".+\\.\\(.+\\)" out-file)
  65                           (match-string 1 out-file))
  66                      "pdf"))
  67          (cmdline (cdr (assoc :cmdline params)))
  68          (in-file (org-babel-temp-file "asymptote-"))
  69          (cmd
  70           (concat "asy "
  71                   (if out-file
  72                       (concat
  73                        "-globalwrite -f " format
  74                        " -o " (org-babel-process-file-name out-file))
  75                     "-V")
  76                   " " cmdline
  77                   " " (org-babel-process-file-name in-file))))
  78     (with-temp-file in-file
  79       (insert (org-babel-expand-body:generic
  80                body params
  81                (org-babel-variable-assignments:asymptote params))))
  82     (message cmd) (shell-command cmd)
  83     nil)) ;; signal that output has already been written to file
  84
  85 (defun org-babel-prep-session:asymptote (session params)
  86   "Return an error if the :session header argument is set.
  87 Asymptote does not support sessions"
  88   (error "Asymptote does not support sessions"))
  89
  90 (defun org-babel-variable-assignments:asymptote (params)
  91   "Return list of asymptote statements assigning the block's variables"
  92   (mapcar #'org-babel-asymptote-var-to-asymptote
  93           (mapcar #'cdr (org-babel-get-header params :var))))
  94
  95 (defun org-babel-asymptote-var-to-asymptote (pair)
  96   "Convert an elisp value into an Asymptote variable.
  97 The elisp value PAIR is converted into Asymptote code specifying
  98 a variable of the same value."
  99   (let ((var (car pair))
 100         (val (if (symbolp (cdr pair))
 101                  (symbol-name (cdr pair))
 102                (cdr pair))))
 103     (cond
 104      ((integerp val)
 105       (format "int %S=%S;" var val))
 106      ((floatp val)
 107       (format "real %S=%S;" var val))
 108      ((stringp val)
 109       (format "string %S=\"%s\";" var val))
 110      ((listp val)
 111       (let* ((dimension-2-p (not (null (cdr val))))
 112              (dim (if dimension-2-p "[][]" "[]"))
 113              (type (org-babel-asymptote-define-type val))
 114              (array (org-babel-asymptote-table-to-array
 115                      val
 116                      (if dimension-2-p '(:lstart "{" :lend "}," :llend "}")))))
 117         (format "%S%s %S=%s;" type dim var array))))))
 118
 119 (defun org-babel-asymptote-table-to-array (table params)
 120   "Convert values of an elisp table into a string of an asymptote array.
 121 Empty cells are ignored."
 122   (labels ((atom-to-string (table)
 123                            (cond
 124                             ((null table) '())
 125                             ((not (listp (car table)))
 126                              (cons (if (and (stringp (car table))
 127                                             (not (string= (car table) "")))
 128                                        (format "\"%s\"" (car table))
 129                                      (format "%s" (car table)))
 130                                    (atom-to-string (cdr table))))
 131                             (t
 132                              (cons (atom-to-string (car table))
 133                                    (atom-to-string (cdr table))))))
 134            ;; Remove any empty row
 135            (fix-empty-lines (table)
 136                             (delq nil (mapcar (lambda (l) (delq "" l)) table))))
 137     (orgtbl-to-generic
 138      (fix-empty-lines (atom-to-string table))
 139      (org-combine-plists '(:hline nil :sep "," :tstart "{" :tend "}") params))))
 140
 141 (defun org-babel-asymptote-define-type (data)
 142   "Determine type of DATA.
 143 DATA is a list. Type symbol is returned as 'symbol. The type is
 144 usually the type of the first atom encountered, except for arrays
 145 of int, where every cell must be of int type."
 146   (labels ((anything-but-int (el)
 147                              (cond
 148                               ((null el) nil)
 149                               ((not (listp (car el)))
 150                                (cond
 151                                 ((floatp (car el)) 'real)
 152                                 ((stringp (car el)) 'string)
 153                                 (t
 154                                  (anything-but-int (cdr el)))))
 155                               (t
 156                                (or (anything-but-int (car el))
 157                                    (anything-but-int (cdr el)))))))
 158     (or (anything-but-int data) 'int)))
 159
 160 (provide 'ob-asymptote)
 161
 162 ;; arch-tag: f2f5bd0d-78e8-412b-8e6c-6dadc94cc06b
 163
 164 ;;; ob-asymptote.el ends here