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| | ;;; ob-J.el --- org-babel functions for J evaluation
;; Copyright (C) 2011-2013 Free Software Foundation, Inc.
;; Author: Oleh Krehel
;; 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:
;; Session interaction depends on `j-console'.
;;; Code:
(require 'ob)
(require 'j-console)
(defun org-babel-expand-body:J (body params &optional processed-params)
"Expand BODY according to PARAMS, return the expanded body.
PROCESSED-PARAMS isn't used yet."
(org-babel-J-interleave-echos-except-functions body))
(defun org-babel-J-interleave-echos (body)
"Interleave echo'' between each source line of BODY."
(mapconcat #'identity (split-string body "\n") "\necho''\n"))
(defun org-babel-J-interleave-echos-except-functions (body)
"Interleave echo'' between source lines of BODY that aren't functions."
(if (string-match-m "\\(?:^\\|\n\\)[^\n]*\\(?:1\\|2\\|3\\|4\\) : 0\n.*)" body)
(let ((s1 (substring body 0 (match-beginning 0)))
(s2 (match-string 0 body))
(s3 (substring body (match-end 0))))
(concat
(org-babel-J-interleave-echos s1)
"\necho''\n"
s2
(org-babel-J-interleave-echos-except-functions s3)))
(org-babel-J-interleave-echos body)))
(defun org-babel-execute:J (body params)
"Execute a block of J code BODY.
PARAMS are given by org-babel.
This function is called by `org-babel-execute-src-block'"
(message "executing J source code block")
(let* ((processed-params (org-babel-process-params params))
(sessionp (cdr (assoc :session params)))
(session (org-babel-j-initiate-session sessionp))
(vars (second processed-params))
(result-params (third processed-params))
(result-type (fourth processed-params))
(full-body (org-babel-expand-body:J
body params processed-params))
(tmp-script-file (org-babel-temp-file "J-src")))
(org-babel-J-strip-whitespace
(if (string= sessionp "none")
(progn
(with-temp-file tmp-script-file
(insert full-body))
(org-babel-eval (format "jconsole < %s" tmp-script-file) ""))
(org-babel-J-eval-string full-body)))))
(defun org-babel-J-eval-string (str)
"Sends STR to the `j-console-cmd' session and exectues it."
(let ((session (j-console-ensure-session)))
(with-current-buffer (process-buffer session)
(goto-char (point-max))
(insert (format "\n%s\n" str))
(let ((beg (point)))
(comint-send-input)
(sit-for .1)
(buffer-substring-no-properties
beg (point-max))))))
(defun org-babel-J-strip-whitespace (str)
"Remove whitespace from jconsole output STR."
(let ((strs (split-string str "\n" t))
out cur s)
(while (setq s (pop strs))
(if (string-match "^ *$" s)
(progn (push (nreverse cur) out)
(setq cur))
(push s cur)))
(mapconcat #'org-babel-J-print-block
(delq nil (nreverse out))
"\n\n")))
(defun org-babel-J-print-block (x)
"Prettify jconsole output X."
(if (= 1 (length x))
(obj-strip-leading-ws (car x))
;; assume only first row is misaligned
(let ((n1 (obj-match-second-space (car x)))
(n2 (obj-match-second-space (cadr x))))
(setcar
x
(if (and n1 n2)
(substring (car x) (- n1 n2))
(obj-strip-leading-ws (car x))))
(mapconcat #'identity x "\n"))))
(defun obj-match-second-space (s)
"Return position of second space in S or nil."
(and (string-match "^ *[^ ]+\\( \\)" s)
(match-beginning 1)))
(defun obj-strip-leading-ws (s)
"String leading whitespace from S."
(and (string-match "^ *\\([^ ].*\\)" s)
(match-string 1 s)))
(defun org-babel-j-initiate-session (&optional session)
"Initiate a J session.
SESSION is a parameter given by org-babel."
(unless (string= session "none")
(require 'j-console)
(j-console-ensure-session)))
(provide 'ob-J)
;;; ob-J.el ends here
|