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|
;;; ob-J.el --- Babel Functions for J -*- lexical-binding: t; -*-
;; Copyright (C) 2011-2018 Free Software Foundation, Inc.
;; Author: Oleh Krehel
;; 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 J code.
;;
;; Session interaction depends on `j-console' from package `j-mode'
;; (available in MELPA).
;;; Code:
(require 'ob)
(declare-function org-trim "org" (s &optional keep-lead))
(declare-function j-console-ensure-session "ext:j-console" ())
(defcustom org-babel-J-command "jconsole"
"Command to call J."
:group 'org-babel
:version "26.1"
:package-version '(Org . "9.0")
:type 'string)
(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 (obj-string-match-m "\\(?:^\\|\n\\)[^\n]*\\(?:0\\|1\\|2\\|3\\|4\\|dyad\\) : 0\n.*\n)\\(?:\n\\|$\\)" body)
(let ((s1 (substring body 0 (match-beginning 0)))
(s2 (match-string 0 body))
(s3 (substring body (match-end 0))))
(concat
(if (string= s1 "")
""
(concat (org-babel-J-interleave-echos s1)
"\necho','\n"))
s2
"\necho','\n"
(org-babel-J-interleave-echos-except-functions s3)))
(org-babel-J-interleave-echos body)))
(defalias 'org-babel-execute:j 'org-babel-execute:J)
(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 (assq :session params)))
(full-body (org-babel-expand-body:J
body params processed-params))
(tmp-script-file (org-babel-temp-file "J-src")))
(org-babel-j-initiate-session sessionp)
(org-babel-J-strip-whitespace
(if (string= sessionp "none")
(progn
(with-temp-file tmp-script-file
(insert full-body))
(org-babel-eval (format "%s < %s" org-babel-J-command 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 executes 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."
(mapconcat
#'identity
(delete "" (mapcar
#'org-babel-J-print-block
(split-string str "^ *,\n" t)))
"\n\n"))
(defun obj-get-string-alignment (str)
"Return a number to describe STR alignment.
STR represents a table.
Positive/negative/zero result means right/left/undetermined.
Don't trust first line."
(let* ((str (org-trim str))
(lines (split-string str "\n" t))
n1 n2)
(cond ((<= (length lines) 1)
0)
((= (length lines) 2)
;; numbers are right-aligned
(if (and
(numberp (read (car lines)))
(numberp (read (cadr lines)))
(setq n1 (obj-match-second-space-right (nth 0 lines)))
(setq n2 (obj-match-second-space-right (nth 1 lines))))
n2
0))
((not (obj-match-second-space-left (nth 0 lines)))
0)
((and
(setq n1 (obj-match-second-space-left (nth 1 lines)))
(setq n2 (obj-match-second-space-left (nth 2 lines)))
(= n1 n2))
n1)
((and
(setq n1 (obj-match-second-space-right (nth 1 lines)))
(setq n2 (obj-match-second-space-right (nth 2 lines)))
(= n1 n2))
(- n1))
(t 0))))
(defun org-babel-J-print-block (x)
"Prettify jconsole output X."
(let* ((x (org-trim x))
(a (obj-get-string-alignment x))
(lines (split-string x "\n" t))
b)
(cond ((< a 0)
(setq b (obj-match-second-space-right (nth 0 lines)))
(concat (make-string (+ a b) ? ) x))
((> a 0)
(setq b (obj-match-second-space-left (nth 0 lines)))
(concat (make-string (- a b) ? ) x))
(t x))))
(defun obj-match-second-space-left (s)
"Return position of leftmost space in second space block of S or nil."
(and (string-match "^ *[^ ]+\\( \\)" s)
(match-beginning 1)))
(defun obj-match-second-space-right (s)
"Return position of rightmost space in second space block of S or nil."
(and (string-match "^ *[^ ]+ *\\( \\)[^ ]" s)
(match-beginning 1)))
(defun obj-string-match-m (regexp string &optional start)
"Call (string-match REGEXP STRING START).
REGEXP is modified so that .* matches newlines as well."
(string-match
(replace-regexp-in-string "\\.\\*" "[\0-\377[:nonascii:]]*" regexp)
string
start))
(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
|
