;;; ob-latex.el --- org-babel functions for latex "evaluation" ;; Copyright (C) 2009-2012 Free Software Foundation, Inc. ;; Author: Eric Schulte ;; 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: ;; 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 'ob) (declare-function org-create-formula-image "org" (string tofile options buffer)) (declare-function org-splice-latex-header "org" (tpl def-pkg pkg snippets-p &optional extra)) (declare-function org-export-latex-fix-inputenc "org-latex" ()) (defvar org-babel-tangle-lang-exts) (add-to-list 'org-babel-tangle-lang-exts '("latex" . "tex")) (defvar org-format-latex-header) (defvar org-format-latex-header-extra) (defvar org-export-latex-packages-alist) (defvar org-export-latex-default-packages-alist) (defvar org-export-pdf-logfiles) (defvar org-latex-to-pdf-process) (defvar org-export-pdf-remove-logfiles) (defvar org-format-latex-options) (defvar org-export-latex-packages-alist) (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) "Expand BODY according to PARAMS, return the expanded body." (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))) (mapcar #'cdr (org-babel-get-header params :var))) (org-babel-trim body)) (defun org-babel-execute:latex (body params) "Execute a block of Latex code with Babel. This function is called by `org-babel-execute-src-block'." (setq body (org-babel-expand-body:latex body params)) (if (cdr (assoc :file params)) (let* ((out-file (cdr (assoc :file params))) (tex-file (org-babel-temp-file "latex-" ".tex")) (border (cdr (assoc :border params))) (imagemagick (cdr (assoc :imagemagick params))) (im-in-options (cdr (assoc :iminoptions params))) (im-out-options (cdr (assoc :imoutoptions params))) (pdfpng (cdr (assoc :pdfpng params))) (fit (or (cdr (assoc :fit params)) border)) (height (and fit (cdr (assoc :pdfheight params)))) (width (and fit (cdr (assoc :pdfwidth params)))) (headers (cdr (assoc :headers 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 ((and (string-match "\\.png$" out-file) (not imagemagick)) (org-create-formula-image body out-file org-format-latex-options in-buffer)) ((or (string-match "\\.pdf$" out-file) imagemagick) (require 'org-latex) (with-temp-file tex-file (insert (org-splice-latex-header org-format-latex-header (delq nil (mapcar (lambda (el) (unless (and (listp el) (string= "hyperref" (cadr el))) el)) org-export-latex-default-packages-alist)) org-export-latex-packages-alist org-format-latex-header-extra) (if fit "\n\\usepackage[active, tightpage]{preview}\n" "") (if border (format "\\setlength{\\PreviewBorder}{%s}" border) "") (if height (concat "\n" (format "\\pdfpageheight %s" height)) "") (if width (concat "\n" (format "\\pdfpagewidth %s" width)) "") (if headers (concat "\n" (if (listp headers) (mapconcat #'identity headers "\n") headers) "\n") "") (if org-format-latex-header-extra (concat "\n" org-format-latex-header-extra) "") (if fit (concat "\n\\begin{document}\n\\begin{preview}\n" body "\n\\end{preview}\n\\end{document}\n") (concat "\n\\begin{document}\n" body "\n\\end{document}\n"))) (org-export-latex-fix-inputenc)) (when (file-exists-p out-file) (delete-file out-file)) (let ((transient-pdf-file (org-babel-latex-tex-to-pdf tex-file))) (cond ((string-match "\\.pdf$" out-file) (rename-file transient-pdf-file out-file)) (imagemagick (convert-pdf transient-pdf-file out-file im-in-options im-out-options) (when (file-exists-p transient-pdf-file) (delete-file transient-pdf-file)))))) ((string-match "\\.\\([^\\.]+\\)$" out-file) (error "can not create %s files, please specify a .png or .pdf file or try the :imagemagick header argument" (match-string 1 out-file)))) nil) ;; signal that output has already been written to file body)) (defun convert-pdf (pdffile out-file im-in-options im-out-options) "Generate a file from a pdf file using imagemagick." (let ((cmd (concat "convert " im-in-options " " pdffile " " im-out-options " " out-file))) (message (concat "Converting pdffile file " cmd "...")) (shell-command cmd))) (defun org-babel-latex-tex-to-pdf (file) "Generate a pdf file according to the contents FILE. Extracted from `org-export-as-pdf' in org-latex.el." (let* ((wconfig (current-window-configuration)) (default-directory (file-name-directory file)) (base (file-name-sans-extension file)) (pdffile (concat base ".pdf")) (cmds org-latex-to-pdf-process) (outbuf (get-buffer-create "*Org PDF LaTeX Output*")) output-dir cmd) (with-current-buffer outbuf (erase-buffer)) (message (concat "Processing LaTeX file " file "...")) (setq output-dir (file-name-directory file)) (if (and cmds (symbolp cmds)) (funcall cmds (shell-quote-argument 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 "%f" cmd) (setq cmd (replace-match (save-match-data (shell-quote-argument file)) t t cmd))) (while (string-match "%o" cmd) (setq cmd (replace-match (save-match-data (shell-quote-argument output-dir)) t t cmd))) (shell-command cmd outbuf))) (message (concat "Processing LaTeX file " file "...done")) (if (not (file-exists-p pdffile)) (error (concat "PDF file " pdffile " was not produced")) (set-window-configuration wconfig) (when org-export-pdf-remove-logfiles (dolist (ext org-export-pdf-logfiles) (setq file (concat base "." ext)) (and (file-exists-p file) (delete-file file)))) (message "Exporting to PDF...done") pdffile))) (defun org-babel-prep-session:latex (session params) "Return an error because LaTeX doesn't support sessions." (error "LaTeX does not support sessions")) (provide 'ob-latex) ;;; ob-latex.el ends here