org-mode/contrib/babel/lisp/langs/org-babel-latex.el

140 lines
5.5 KiB
EmacsLisp

;;; org-babel-latex.el --- org-babel functions for latex "evaluation"
;; Copyright (C) 2009 Eric Schulte
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research
;; Homepage: http://orgmode.org
;; Version: 0.01
;;; License:
;; This program 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, or (at your option)
;; any later version.
;;
;; This program 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; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; Org-Babel support for evaluating LaTeX source code.
;;
;; Currently on evaluation this returns raw LaTeX code, unless a :file
;; header argument is given in which case small png or pdf files will
;; be created directly form the latex source code.
;;; Code:
(require 'org-babel)
(org-babel-add-interpreter "latex")
(add-to-list 'org-babel-tangle-langs '("latex" "tex"))
(defvar org-babel-default-header-args:latex
'((:results . "latex") (:exports . "results"))
"Default arguments to use when evaluating a latex source block.")
(defun org-babel-expand-body:latex (body params &optional processed-params)
(mapc (lambda (pair) ;; replace variables
(setq body
(replace-regexp-in-string
(regexp-quote (format "%S" (car pair)))
(if (stringp (cdr pair))
(cdr pair) (format "%S" (cdr pair)))
body))) (second (org-babel-process-params params)))
body)
(defun org-babel-execute:latex (body params)
"Execute a block of Latex code with org-babel. This function is
called by `org-babel-execute-src-block'."
(message "executing Latex source code block")
(setq body (org-babel-expand-body:latex body params))
(if (cdr (assoc :file params))
(let ((out-file (cdr (assoc :file params)))
(tex-file (make-temp-file "org-babel-latex" nil ".tex"))
(pdfheight (cdr (assoc :pdfheight params)))
(pdfwidth (cdr (assoc :pdfwidth params)))
(in-buffer (not (string= "no" (cdr (assoc :buffer params)))))
(org-export-latex-packages-alist
(append (cdr (assoc :packages params))
org-export-latex-packages-alist)))
(cond
((string-match "\\.png$" out-file)
(org-create-formula-image
body out-file org-format-latex-options in-buffer))
((string-match "\\.pdf$" out-file)
(org-babel-latex-body-to-tex-file tex-file body pdfheight pdfwidth)
(when (file-exists-p out-file) (delete-file out-file))
(rename-file (org-babel-latex-tex-to-pdf tex-file) out-file))
((string-match "\\.\\([^\\.]+\\)$" out-file)
(error
(message "can not create %s files, please specify a .png or .pdf file"
(match-string 1 out-file)))))
out-file)
body))
(defun org-babel-latex-body-to-tex-file (tex-file body &optional height width)
"Extracted from `org-create-formula-image' in org.el."
(with-temp-file tex-file
(insert (org-splice-latex-header
org-format-latex-header
(remove-if
(lambda (el) (and (listp el) (string= "hyperref" (cadr el))))
org-export-latex-default-packages-alist)
org-export-latex-packages-alist
org-format-latex-header-extra)
(if height (concat "\n" (format "\\pdfpageheight %s" height)) "")
(if width (concat "\n" (format "\\pdfpagewidth %s" width)) "")
(if org-format-latex-header-extra
(concat "\n" org-format-latex-header-extra)
"")
"\n\\begin{document}\n" body "\n\\end{document}\n")))
(defun org-babel-latex-tex-to-pdf (tex-file)
"Extracted from `org-export-as-pdf' in org-latex.el."
(let* ((wconfig (current-window-configuration))
(default-directory (file-name-directory tex-file))
(base (file-name-sans-extension tex-file))
(pdffile (concat base ".pdf"))
(cmds org-latex-to-pdf-process)
(outbuf (get-buffer-create "*Org PDF LaTeX Output*"))
cmd)
(if (and cmds (symbolp cmds))
(funcall cmds tex-file)
(while cmds
(setq cmd (pop cmds))
(while (string-match "%b" cmd)
(setq cmd (replace-match
(save-match-data
(shell-quote-argument base))
t t cmd)))
(while (string-match "%s" cmd)
(setq cmd (replace-match
(save-match-data
(shell-quote-argument tex-file))
t t cmd)))
(shell-command cmd outbuf outbuf)))
(if (not (file-exists-p pdffile))
(error "PDF file was not produced from %s" tex-file)
(set-window-configuration wconfig)
(when org-export-pdf-remove-logfiles
(dolist (ext org-export-pdf-logfiles)
(setq tex-file (concat base "." ext))
(and (file-exists-p tex-file) (delete-file tex-file))))
pdffile)))
(defun org-babel-prep-session:latex (session params)
(error "Latex does not support sessions"))
(provide 'org-babel-latex)
;;; org-babel-latex.el ends here