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|
;;; ob-asymptote.el --- Babel Functions for Asymptote -*- lexical-binding: t; -*-
;; Copyright (C) 2009-2020 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research
;; Homepage: https://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 <https://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)
(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* ((out-file (cdr (assq :file params)))
(format (or (file-name-extension out-file)
"pdf"))
(cmdline (cdr (assq :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
(org-babel--get-vars params)))
(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 (let ((v (cdr pair)))
(if (symbolp v) (symbol-name v) v))))
(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))
((and (listp val) (not (listp (car val))))
(let* ((type (org-babel-asymptote-define-type val))
(fmt (if (eq 'string type) "\"%s\"" "%s"))
(vect (mapconcat (lambda (e) (format fmt e)) val ", ")))
(format "%s[] %S={%s};" type var vect)))
((listp val)
(let* ((type (org-babel-asymptote-define-type val))
(fmt (if (eq 'string type) "\"%s\"" "%s"))
(array (mapconcat (lambda (row)
(concat "{"
(mapconcat (lambda (e) (format fmt e))
row ", ")
"}"))
val ",")))
(format "%S[][] %S={%s};" type var array))))))
(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 `real', if some elements are floats, or
`int'."
(letrec ((type 'int)
(find-type
(lambda (row)
(dolist (e row type)
(cond ((listp e) (setq type (funcall find-type e)))
((stringp e) (throw 'exit 'string))
((floatp e) (setq type 'real)))))))
(catch 'exit (funcall find-type data)) type))
(provide 'ob-asymptote)
;;; ob-asymptote.el ends here
|
