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| | ;;; ob-asymptote.el --- org-babel functions for asymptote evaluation
;; Copyright (C) 2009-2011 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; 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/>.
;;; Commentary:
;; Org-Babel support for evaluating asymptote source code.
;;
;; This differs from most standard languages in that
;;
;; 1) there is no such thing as a "session" in asymptote
;;
;; 2) we are generally only going to return results of type "file"
;;
;; 3) we are adding the "file" and "cmdline" header arguments, if file
;; is omitted then the -V option is passed to the asy command for
;; interactive viewing
;;; Requirements:
;; - The asymptote program :: http://asymptote.sourceforge.net/
;;
;; - asy-mode :: Major mode for editing asymptote files
;;; Code:
(require 'ob)
(eval-when-compile (require 'cl))
(declare-function orgtbl-to-generic "org-table" (table params))
(declare-function org-combine-plists "org" (&rest plists))
(defvar org-babel-tangle-lang-exts)
(add-to-list 'org-babel-tangle-lang-exts '("asymptote" . "asy"))
(defvar org-babel-default-header-args:asymptote
'((:results . "file") (:exports . "results"))
"Default arguments when evaluating an Asymptote source block.")
(defun org-babel-execute:asymptote (body params)
"Execute a block of Asymptote code.
This function is called by `org-babel-execute-src-block'."
(let* ((result-params (split-string (or (cdr (assoc :results params)) "")))
(out-file (cdr (assoc :file params)))
(format (or (and out-file
(string-match ".+\\.\\(.+\\)" out-file)
(match-string 1 out-file))
"pdf"))
(cmdline (cdr (assoc :cmdline params)))
(in-file (org-babel-temp-file "asymptote-"))
(cmd
(concat "asy "
(if out-file
(concat
"-globalwrite -f " format
" -o " (org-babel-process-file-name out-file))
"-V")
" " cmdline
" " (org-babel-process-file-name in-file))))
(with-temp-file in-file
(insert (org-babel-expand-body:generic
body params
(org-babel-variable-assignments:asymptote params))))
(message cmd) (shell-command cmd)
nil)) ;; signal that output has already been written to file
(defun org-babel-prep-session:asymptote (session params)
"Return an error if the :session header argument is set.
Asymptote does not support sessions"
(error "Asymptote does not support sessions"))
(defun org-babel-variable-assignments:asymptote (params)
"Return list of asymptote statements assigning the block's variables"
(mapcar #'org-babel-asymptote-var-to-asymptote
(mapcar #'cdr (org-babel-get-header params :var))))
(defun org-babel-asymptote-var-to-asymptote (pair)
"Convert an elisp value into an Asymptote variable.
The elisp value PAIR is converted into Asymptote code specifying
a variable of the same value."
(let ((var (car pair))
(val (if (symbolp (cdr pair))
(symbol-name (cdr pair))
(cdr pair))))
(cond
((integerp val)
(format "int %S=%S;" var val))
((floatp val)
(format "real %S=%S;" var val))
((stringp val)
(format "string %S=\"%s\";" var val))
((listp val)
(let* ((dimension-2-p (cdr val))
(dim (if dimension-2-p "[][]" "[]"))
(type (org-babel-asymptote-define-type val))
(array (org-babel-asymptote-table-to-array
val type
(if dimension-2-p '(:lstart "{" :lend "}," :llend "}")))))
(format "%S%s %S=%s;" type dim var array))))))
(defun org-babel-asymptote-table-to-array (table type params)
"Convert values of TABLE into a string of an asymptote array.
TABLE is a list whose atoms are assumed to be of type
TYPE. PARAMS is a plist of parameters that can influence the
conversion.
Empty cells are ignored."
(labels ((atom-to-string (table)
(cond
((null table) '())
((not (listp (car table)))
(cons (if (or (eq type 'string)
(and (stringp (car table))
(not (string= (car table) ""))))
(format "\"%s\"" (car table))
(format "%s" (car table)))
(atom-to-string (cdr table))))
(t
(cons (atom-to-string (car table))
(atom-to-string (cdr table))))))
;; Remove any empty row
(fix-empty-lines (table)
(delq nil (mapcar (lambda (l) (delq "" l)) table))))
(orgtbl-to-generic
(fix-empty-lines (atom-to-string table))
(org-combine-plists '(:hline nil :sep "," :tstart "{" :tend "}") params))))
(defun org-babel-asymptote-define-type (data)
"Determine type of DATA.
DATA is a list. Return type as a symbol.
The type is `string' if any element in DATA is
a string. Otherwise, it is either `float', if some elements are
floats, or `int'."
(let* ((type 'int)
(find-type
(lambda (row)
(catch 'exit
(mapc (lambda (el)
(cond ((listp el) (funcall find-type el))
((stringp el) (throw 'exit (setq type 'string)))
((floatp el) (setq type 'float))))
row)))))
(funcall find-type data) type))
(provide 'ob-asymptote)
;;; ob-asymptote.el ends here
|