branch: externals/ob-asymptote
commit 1b4340916e5f7fc9c8933a07c27ac05527b16389
Author: Jarmo Hurri <jarmo.hu...@iki.fi>
Commit: Jarmo Hurri <jarmo.hu...@iki.fi>
* initial elisp file copied from org-contrib
---
ob-asymptote.el | 138 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 138 insertions(+)
diff --git a/ob-asymptote.el b/ob-asymptote.el
new file mode 100644
index 0000000000..55811bd409
--- /dev/null
+++ b/ob-asymptote.el
@@ -0,0 +1,138 @@
+;;; ob-asymptote.el --- Babel Functions for Asymptote -*- lexical-binding: t;
-*-
+
+;; Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+;; Author: Eric Schulte
+;; Maintainer: Jarmo Hurri <jarmo.hu...@iki.fi>
+;; Keywords: literate programming, reproducible research
+;; Homepage: https://git.sr.ht/~bzg/org-contrib
+
+;; This file is not 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
