emacs-orgmode@gnu.org archives
 help / color / mirror / code / Atom feed
blob f961a99076c17b00170afaa0ed9ebae06866e4c3 6916 bytes (raw)
name: lisp/ob-processing.el 	 # note: path name is non-authoritative(*)

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
 
;;; ob-processing.el --- Babel functions for processing -*- lexical-binding: t; -*-

;; Copyright (C) 2015-2022 Free Software Foundation, Inc.

;; Author: Jarmo Hurri (adapted from ob-asymptote.el written by 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:

;; Babel support for evaluating processing source code.
;;
;; This differs from most standard languages in that
;;
;; 1) there is no such thing as a "session" in processing
;;
;; 2) results can only be exported as html; in this case, the
;;    processing code is embedded via a file into a javascript block
;;    using the processing.js module; the script then draws the
;;    resulting output when the web page is viewed in a browser; note
;;    that the user is responsible for making sure that processing.js
;;    is available on the website
;;
;; 3) it is possible to interactively view the sketch of the
;;    Processing code block via Processing 2.0 Emacs mode, using
;;    `org-babel-processing-view-sketch'.  You can bind this command
;;    to, e.g., C-c C-v C-k with
;;
;;      (define-key org-babel-map (kbd "C-k") 'org-babel-processing-view-sketch)


;;; Requirements:

;; - processing2-emacs mode :: https://github.com/ptrv/processing2-emacs
;; - Processing.js module :: https://processingjs.org/

;;; Code:
(require 'ob)
(require 'sha1)

(declare-function processing-sketch-run "ext:processing-mode" ())

(defvar org-babel-temporary-directory)

(defvar org-babel-tangle-lang-exts)
(add-to-list 'org-babel-tangle-lang-exts '("processing" . "pde"))

;; Default header tags depend on whether exporting html or not; if not
;; exporting html, then no results are produced; otherwise results are
;; HTML.
(defvar org-babel-default-header-args:processing
  '((:results . "html") (:exports . "results"))
  "Default arguments when evaluating a Processing source block.")

(defvar org-babel-processing-processing-js-filename "processing.js"
  "Filename of the processing.js file.")

(defun org-babel-processing-view-sketch ()
  "Show the sketch of the Processing block under point in an external viewer."
  (interactive)
  (require 'processing-mode)
  (let ((info (org-babel-get-src-block-info)))
    (if (string= (nth 0 info) "processing")
	(let* ((body (nth 1 info))
	       (params (org-babel-process-params (nth 2 info)))
	       (sketch-code
		(org-babel-expand-body:generic
		 body
		 params
		 (org-babel-variable-assignments:processing params))))
	  ;; Note: sketch filename can not contain a hyphen, since it
	  ;; has to be a valid java class name; for this reason
	  ;; make-temp-file is repeated until no hyphen is in the
	  ;; name; also sketch dir name must be the same as the
	  ;; basename of the sketch file.
	  (let* ((temporary-file-directory org-babel-temporary-directory)
		 (sketch-dir
		  (let (sketch-dir-candidate)
		    (while
			(progn
			  (setq sketch-dir-candidate
				(make-temp-file "processing" t))
			  (when (string-match-p
				 "-"
				 (file-name-nondirectory sketch-dir-candidate))
			    (delete-directory sketch-dir-candidate)
			    t)))
		    sketch-dir-candidate))
		 (sketch-filename
		  (concat sketch-dir
			  "/"
			  (file-name-nondirectory sketch-dir)
			  ".pde")))
	    (with-temp-file sketch-filename (insert sketch-code))
	    (find-file sketch-filename)
	    (processing-sketch-run)
	    (kill-buffer)))
      (message "Not inside a Processing source block."))))

(defun org-babel-execute:processing (body params)
  "Execute a block of Processing code.
This function is called by `org-babel-execute-src-block'."
  (let ((sketch-code
	 (org-babel-expand-body:generic
	  body
	  params
	  (org-babel-variable-assignments:processing params))))
    ;; Results are HTML.
    (let ((sketch-canvas-id (concat "ob-" (sha1 sketch-code))))
      (concat "<script src=\""
	      org-babel-processing-processing-js-filename
	      "\"></script>\n <script type=\"text/processing\""
	      " data-processing-target=\""
	      sketch-canvas-id
	      "\">\n"
	      sketch-code
	      "\n</script> <canvas id=\""
	      sketch-canvas-id
	      "\"></canvas>"))))

(defun org-babel-prep-session:processing (_session _params)
  "Return an error if the :session header argument is set.
Processing does not support sessions."
  (error "Processing does not support sessions"))

(defun org-babel-variable-assignments:processing (params)
  "Return list of processing statements assigning the block's variables."
  (mapcar #'org-babel-processing-var-to-processing
	  (org-babel--get-vars params)))

(defun org-babel-processing-var-to-processing (pair)
  "Convert an elisp value into a Processing variable.
The elisp value PAIR is converted into Processing 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 "float %S=%S;" var val))
     ((stringp val)
      (format "String %S=\"%s\";" var val))
     ((and (listp val) (not (listp (car val))))
      (let* ((type (org-babel-processing-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-processing-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-processing-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'."
  (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 'float)))))))
    (catch 'exit (funcall find-type data))))

(provide 'ob-processing)

;;; ob-processing.el ends here

debug log:

solving f961a9907 ...
found f961a9907 in https://git.savannah.gnu.org/cgit/emacs/org-mode.git

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).