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Diffstat (limited to 'lisp/ob-latex.el')
| -rw-r--r-- | lisp/ob-latex.el | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/lisp/ob-latex.el b/lisp/ob-latex.el new file mode 100644 index 0000000..43f673e --- /dev/null +++ b/lisp/ob-latex.el @@ -0,0 +1,200 @@ +;;; 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 |