forked from mirrors/org-mode
201 lines
7.6 KiB
EmacsLisp
201 lines
7.6 KiB
EmacsLisp
;;; ob-latex.el --- org-babel functions for latex "evaluation"
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;; Copyright (C) 2009-2011 Free Software Foundation, Inc.
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;; Author: Eric Schulte
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;; Keywords: literate programming, reproducible research
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;; Homepage: http://orgmode.org
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Org-Babel support for evaluating LaTeX source code.
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;;
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;; Currently on evaluation this returns raw LaTeX code, unless a :file
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;; header argument is given in which case small png or pdf files will
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;; be created directly form the latex source code.
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;;; Code:
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(require 'ob)
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(declare-function org-create-formula-image "org" (string tofile options buffer))
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(declare-function org-splice-latex-header "org"
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(tpl def-pkg pkg snippets-p &optional extra))
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(declare-function org-export-latex-fix-inputenc "org-latex" ())
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(defvar org-babel-tangle-lang-exts)
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(add-to-list 'org-babel-tangle-lang-exts '("latex" . "tex"))
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(defvar org-format-latex-header)
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(defvar org-format-latex-header-extra)
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(defvar org-export-latex-packages-alist)
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(defvar org-export-latex-default-packages-alist)
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(defvar org-export-pdf-logfiles)
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(defvar org-latex-to-pdf-process)
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(defvar org-export-pdf-remove-logfiles)
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(defvar org-format-latex-options)
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(defvar org-export-latex-packages-alist)
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(defvar org-babel-default-header-args:latex
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'((:results . "latex") (:exports . "results"))
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"Default arguments to use when evaluating a LaTeX source block.")
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(defun org-babel-expand-body:latex (body params)
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"Expand BODY according to PARAMS, return the expanded body."
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(mapc (lambda (pair) ;; replace variables
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(setq body
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(replace-regexp-in-string
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(regexp-quote (format "%S" (car pair)))
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(if (stringp (cdr pair))
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(cdr pair) (format "%S" (cdr pair)))
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body))) (mapcar #'cdr (org-babel-get-header params :var)))
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(org-babel-trim body))
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(defun org-babel-execute:latex (body params)
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"Execute a block of Latex code with Babel.
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This function is called by `org-babel-execute-src-block'."
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(setq body (org-babel-expand-body:latex body params))
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(if (cdr (assoc :file params))
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(let* ((out-file (cdr (assoc :file params)))
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(tex-file (org-babel-temp-file "latex-" ".tex"))
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(border (cdr (assoc :border params)))
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(imagemagick (cdr (assoc :imagemagick params)))
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(im-in-options (cdr (assoc :iminoptions params)))
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(im-out-options (cdr (assoc :imoutoptions params)))
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(pdfpng (cdr (assoc :pdfpng params)))
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(fit (or (cdr (assoc :fit params)) border))
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(height (and fit (cdr (assoc :pdfheight params))))
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(width (and fit (cdr (assoc :pdfwidth params))))
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(headers (cdr (assoc :headers params)))
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(in-buffer (not (string= "no" (cdr (assoc :buffer params)))))
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(org-export-latex-packages-alist
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(append (cdr (assoc :packages params))
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org-export-latex-packages-alist)))
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(cond
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((and (string-match "\\.png$" out-file) (not imagemagick))
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(org-create-formula-image
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body out-file org-format-latex-options in-buffer))
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((or (string-match "\\.pdf$" out-file) imagemagick)
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(require 'org-latex)
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(with-temp-file tex-file
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(insert
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(org-splice-latex-header
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org-format-latex-header
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(delq
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nil
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(mapcar
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(lambda (el)
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(unless (and (listp el) (string= "hyperref" (cadr el)))
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el))
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org-export-latex-default-packages-alist))
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org-export-latex-packages-alist
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org-format-latex-header-extra)
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(if fit "\n\\usepackage[active, tightpage]{preview}\n" "")
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(if border (format "\\setlength{\\PreviewBorder}{%s}" border) "")
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(if height (concat "\n" (format "\\pdfpageheight %s" height)) "")
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(if width (concat "\n" (format "\\pdfpagewidth %s" width)) "")
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(if headers
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(concat "\n"
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(if (listp headers)
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(mapconcat #'identity headers "\n")
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headers) "\n")
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"")
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(if org-format-latex-header-extra
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(concat "\n" org-format-latex-header-extra)
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"")
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(if fit
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(concat "\n\\begin{document}\n\\begin{preview}\n" body
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"\n\\end{preview}\n\\end{document}\n")
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(concat "\n\\begin{document}\n" body "\n\\end{document}\n")))
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(org-export-latex-fix-inputenc))
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(when (file-exists-p out-file) (delete-file out-file))
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(let ((transient-pdf-file (org-babel-latex-tex-to-pdf tex-file)))
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(cond
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((string-match "\\.pdf$" out-file)
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(rename-file transient-pdf-file out-file))
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(imagemagick
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(convert-pdf
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transient-pdf-file out-file im-in-options im-out-options)
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(when (file-exists-p transient-pdf-file)
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(delete-file transient-pdf-file))))))
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((string-match "\\.\\([^\\.]+\\)$" out-file)
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(error "can not create %s files, please specify a .png or .pdf file or try the :imagemagick header argument"
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(match-string 1 out-file))))
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nil) ;; signal that output has already been written to file
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body))
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(defun convert-pdf (pdffile out-file im-in-options im-out-options)
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"Generate a file from a pdf file using imagemagick."
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(let ((cmd (concat "convert " im-in-options " " pdffile " "
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im-out-options " " out-file)))
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(message (concat "Converting pdffile file " cmd "..."))
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(shell-command cmd)))
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(defun org-babel-latex-tex-to-pdf (file)
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"Generate a pdf file according to the contents FILE.
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Extracted from `org-export-as-pdf' in org-latex.el."
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(let* ((wconfig (current-window-configuration))
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(default-directory (file-name-directory file))
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(base (file-name-sans-extension file))
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(pdffile (concat base ".pdf"))
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(cmds org-latex-to-pdf-process)
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(outbuf (get-buffer-create "*Org PDF LaTeX Output*"))
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output-dir cmd)
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(with-current-buffer outbuf (erase-buffer))
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(message (concat "Processing LaTeX file " file "..."))
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(setq output-dir (file-name-directory file))
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(if (and cmds (symbolp cmds))
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(funcall cmds (shell-quote-argument file))
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(while cmds
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(setq cmd (pop cmds))
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(while (string-match "%b" cmd)
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(setq cmd (replace-match
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(save-match-data
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(shell-quote-argument base))
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t t cmd)))
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(while (string-match "%f" cmd)
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(setq cmd (replace-match
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(save-match-data
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(shell-quote-argument file))
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t t cmd)))
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(while (string-match "%o" cmd)
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(setq cmd (replace-match
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(save-match-data
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(shell-quote-argument output-dir))
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t t cmd)))
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(shell-command cmd outbuf)))
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(message (concat "Processing LaTeX file " file "...done"))
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(if (not (file-exists-p pdffile))
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(error (concat "PDF file " pdffile " was not produced"))
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(set-window-configuration wconfig)
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(when org-export-pdf-remove-logfiles
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(dolist (ext org-export-pdf-logfiles)
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(setq file (concat base "." ext))
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(and (file-exists-p file) (delete-file file))))
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(message "Exporting to PDF...done")
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pdffile)))
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(defun org-babel-prep-session:latex (session params)
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"Return an error because LaTeX doesn't support sessions."
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(error "LaTeX does not support sessions"))
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(provide 'ob-latex)
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;;; ob-latex.el ends here
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