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;;; org-export-latex.el --- LaTeX exporter for org-mode
;;
;; Copyright (C) 2007, 2008 Free Software Foundation, Inc.
;;
;; Emacs Lisp Archive Entry
;; Filename: org-export-latex.el
;; Version: 6.15trans
;; Author: Bastien Guerry <bzg AT altern DOT org>
;; Maintainer: Bastien Guerry <bzg AT altern DOT org>
;; Keywords: org, wp, tex
;; Description: Converts an org-mode buffer into LaTeX
;; URL: http://www.cognition.ens.fr/~guerry/u/org-export-latex.el

;; 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:
;;
;; This library implements a LaTeX exporter for org-mode.
;;
;; Put this file into your load-path and the following into your ~/.emacs:
;;   (require 'org-export-latex)
;;
;; The interactive functions are similar to those of the HTML exporter:
;;
;; M-x `org-export-as-latex'
;; M-x `org-export-as-pdf'
;; M-x `org-export-as-pdf-and-open'
;; M-x `org-export-as-latex-batch'
;; M-x `org-export-as-latex-to-buffer'
;; M-x `org-export-region-as-latex'
;; M-x `org-replace-region-by-latex'
;;
;;; Code:

(eval-when-compile
  (require 'cl))

(require 'footnote)
(require 'org)
(require 'org-exp)

;;; Variables:
(defvar org-export-latex-class nil)
(defvar org-export-latex-header nil)
(defvar org-export-latex-append-header nil)
(defvar org-export-latex-options-plist nil)
(defvar org-export-latex-todo-keywords-1 nil)
(defvar org-export-latex-all-targets-re nil)
(defvar org-export-latex-add-level 0)
(defvar org-export-latex-sectioning "")
(defvar org-export-latex-sectioning-depth 0)
(defvar org-export-latex-special-string-regexps
  '(org-ts-regexp
    org-scheduled-string
    org-deadline-string
    org-clock-string)
  "A list of regexps to convert as special keywords.")

(defvar latexp)    ; dynamically scoped from org.el
(defvar re-quote)  ; dynamically scoped from org.el
(defvar commentsp) ; dynamically scoped from org.el

;;; User variables:

(defgroup org-export-latex nil
  "Options for exporting Org-mode files to LaTeX."
  :tag "Org Export LaTeX"
  :group 'org-export)

(defcustom org-export-latex-default-class "article"
  "The default LaTeX class."
  :group 'org-export-latex
  :type '(string :tag "LaTeX class"))

(defcustom org-export-latex-classes
  '(("article"
     "\\documentclass[11pt,a4paper]{article}
\\usepackage[utf8]{inputenc}
\\usepackage[T1]{fontenc}
\\usepackage{graphicx}
\\usepackage{longtable}
\\usepackage{hyperref}"
     ("\\section{%s}" . "\\section*{%s}")
     ("\\subsection{%s}" . "\\subsection*{%s}")
     ("\\subsubsection{%s}" . "\\subsubsection*{%s}")
     ("\\paragraph{%s}" . "\\paragraph*{%s}")
     ("\\subparagraph{%s}" . "\\subparagraph*{%s}"))
    ("report"
     "\\documentclass[11pt,a4paper]{report}
\\usepackage[utf8]{inputenc}
\\usepackage[T1]{fontenc}
\\usepackage{graphicx}
\\usepackage{longtable}
\\usepackage{hyperref}"
     ("\\part{%s}" . "\\part*{%s}")
     ("\\chapter{%s}" . "\\chapter*{%s}")
     ("\\section{%s}" . "\\section*{%s}")
     ("\\subsection{%s}" . "\\subsection*{%s}")
     ("\\subsubsection{%s}" . "\\subsubsection*{%s}"))
    ("book"
     "\\documentclass[11pt,a4paper]{book}
\\usepackage[utf8]{inputenc}
\\usepackage[T1]{fontenc}
\\usepackage{graphicx}
\\usepackage{longtable}
\\usepackage{hyperref}"
     ("\\part{%s}" . "\\part*{%s}")
     ("\\chapter{%s}" . "\\chapter*{%s}")
     ("\\section{%s}" . "\\section*{%s}")
     ("\\subsection{%s}" . "\\subsection*{%s}")
     ("\\subsubsection{%s}" . "\\subsubsection*{%s}")))
  "Alist of LaTeX classes and associated header and structure.
If #+LaTeX_CLASS is set in the buffer, use its value and the
associated information.  Here is the structure of each cell:

  \(class-name
    header-string
    (numbered-section . unnumbered-section\)
    ...\)

A %s formatter is mandatory in each section string and will be
replaced by the title of the section.

Instead of a cons cell (numbered . unnumbered), you can also provide a list
of 2-4 elements,

  (numbered-open numbered-close)

or

  (numbered-open numbered-close unnumbered-open unnumbered-close)

providing opening and closing strings for an environment that should
represent the document section.  The opening clause should have a %s
to represent the section title."
  :group 'org-export-latex
  :type '(repeat
	  (list (string :tag "LaTeX class")
		(string :tag "LaTeX header")
		(repeat :tag "Levels" :inline t
			(choice
			 (cons :tag "Heading"
			       (string :tag "numbered")
			       (string :tag "unnumbered)"))
			 (list :tag "Environment"
			       (string :tag "Opening (numbered)  ")
			       (string :tag "Closing (numbered)  ")
			       (string :tag "Opening (unnumbered)")
			       (string :tag "Closing (unnumbered)")))))))

(defcustom org-export-latex-emphasis-alist
  '(("*" "\\textbf{%s}" nil)
    ("/" "\\emph{%s}" nil)
    ("_" "\\underline{%s}" nil)
    ("+" "\\texttt{%s}" nil)
    ("=" "\\verb|%s|" nil)
    ("~" "\\verb|%s|" t))
  "Alist of LaTeX expressions to convert emphasis fontifiers.
Each element of the list is a list of three elements.
The first element is the character used as a marker for fontification.
The second element is a formatting string to wrap fontified text with.
The third element decides whether to protect converted text from other
conversions."
  :group 'org-export-latex
  :type 'alist)

(defcustom org-export-latex-title-command "\\maketitle"
  "The command used to insert the title just after \\begin{document}.
If this string contains the formatting specification \"%s\" then
it will be used as a formatting string, passing the title as an
argument."
  :group 'org-export-latex
  :type 'string)

(defcustom org-export-latex-date-format
  "%d %B %Y"
  "Format string for \\date{...}."
  :group 'org-export-latex
  :type 'string)

(defcustom org-export-latex-tables-verbatim nil
  "When non-nil, tables are exported verbatim."
  :group 'org-export-latex
  :type 'boolean)

(defcustom org-export-latex-tables-column-borders nil
  "When non-nil, group of columns are surrounded with borders."
  :group 'org-export-latex
  :type 'boolean)

(defcustom org-export-latex-packages-alist nil
  "Alist of packages to be inserted in the header.
Each cell is of the forma \( \"option\" . \"package\" \)."
  :group 'org-export-latex
  :type 'alist)

(defcustom org-export-latex-low-levels 'description
  "How to convert sections below the current level of sectioning.
This is specified by the `org-export-headline-levels' option or the
value of \"H:\" in Org's #+OPTION line.

This can be either nil (skip the sections), 'description (convert
the sections as descriptive lists) or a string to be used instead
of \\section{%s}. In this latter case, the %s stands here for the
inserted headline and is mandatory."
  :group 'org-export-latex
  :type '(choice (const :tag "Ignore" nil)
		 (symbol :tag "Convert as descriptive list" description)
		 (string :tag "Use a section string" :value "\\subparagraph{%s}")))

(defcustom org-export-latex-remove-from-headlines
  '(:todo t :priority t :tags t)
  "A plist of keywords to remove from headlines.
Non-nil means remove this keyword type from the headline.

Don't remove the keys, just change their values."
  :type 'plist
  :group 'org-export-latex)

(defcustom org-export-latex-image-default-option "width=10em"
  "Default option for images."
  :group 'org-export-latex
  :type 'string)

(defcustom org-export-latex-coding-system nil
  "Coding system for the exported LaTex file."
  :group 'org-export-latex
  :type 'coding-system)

(defgroup org-export-pdf nil
  "Options for exporting Org-mode files to PDF, via LaTeX."
  :tag "Org Export LaTeX"
  :group 'org-export-latex
  :group 'org-export)

(defcustom org-export-pdf-remove-logfiles t
  "Non-nil means, remove the logfiles produced by PDF production.
These are the .aux, .log, .out, and .toc files."
  :group 'org-export-latex
  :type 'boolean)

;;; Autoload functions:

;;;###autoload
(defun org-export-as-latex-batch ()
  "Call `org-export-as-latex', may be used in batch processing.
For example:

emacs   --batch
        --load=$HOME/lib/emacs/org.el
        --eval \"(setq org-export-headline-levels 2)\"
        --visit=MyFile --funcall org-export-as-latex-batch"
  (org-export-as-latex org-export-headline-levels 'hidden))

;;;###autoload
(defun org-export-as-latex-to-buffer (arg)
  "Call `org-export-as-latex` with output to a temporary buffer.
No file is created.  The prefix ARG is passed through to `org-export-as-latex'."
  (interactive "P")
  (org-export-as-latex arg nil nil "*Org LaTeX Export*")
  (switch-to-buffer-other-window "*Org LaTeX Export*"))

;;;###autoload
(defun org-replace-region-by-latex (beg end)
  "Replace the region from BEG to END with its LaTeX export.
It assumes the region has `org-mode' syntax, and then convert it to
LaTeX.  This can be used in any buffer.  For example, you could
write an itemized list in `org-mode' syntax in an LaTeX buffer and
then use this command to convert it."
  (interactive "r")
  (let (reg latex buf)
    (save-window-excursion
      (if (org-mode-p)
	  (setq latex (org-export-region-as-latex
		       beg end t 'string))
	(setq reg (buffer-substring beg end)
	      buf (get-buffer-create "*Org tmp*"))
	(save-excursion
	  (set-buffer buf)
	  (erase-buffer)
	  (insert reg)
	  (org-mode)
	  (setq latex (org-export-region-as-latex
		       (point-min) (point-max) t 'string)))
	(kill-buffer buf)))
    (delete-region beg end)
    (insert latex)))

;;;###autoload
(defun org-export-region-as-latex (beg end &optional body-only buffer)
  "Convert region from BEG to END in `org-mode' buffer to LaTeX.
If prefix arg BODY-ONLY is set, omit file header, footer, and table of
contents, and only produce the region of converted text, useful for
cut-and-paste operations.
If BUFFER is a buffer or a string, use/create that buffer as a target
of the converted LaTeX.  If BUFFER is the symbol `string', return the
produced LaTeX as a string and leave not buffer behind.  For example,
a Lisp program could call this function in the following way:

  (setq latex (org-export-region-as-latex beg end t 'string))

When called interactively, the output buffer is selected, and shown
in a window.  A non-interactive call will only retunr the buffer."
  (interactive "r\nP")
  (when (interactive-p)
    (setq buffer "*Org LaTeX Export*"))
  (let ((transient-mark-mode t) (zmacs-regions t)
	rtn)
    (goto-char end)
    (set-mark (point)) ;; to activate the region
    (goto-char beg)
    (setq rtn (org-export-as-latex
	       nil nil nil
	       buffer body-only))
    (if (fboundp 'deactivate-mark) (deactivate-mark))
    (if (and (interactive-p) (bufferp rtn))
	(switch-to-buffer-other-window rtn)
      rtn)))

;;;###autoload
(defun org-export-as-latex (arg &optional hidden ext-plist
				to-buffer body-only pub-dir)
  "Export current buffer to a LaTeX file.
If there is an active region, export only the region.  The prefix
ARG specifies how many levels of the outline should become
headlines.  The default is 3.  Lower levels will be exported
depending on `org-export-latex-low-levels'.  The default is to
convert them as description lists.  When HIDDEN is non-nil, don't
display the LaTeX buffer.  EXT-PLIST is a property list with
external parameters overriding org-mode's default settings, but
still inferior to file-local settings.  When TO-BUFFER is
non-nil, create a buffer with that name and export to that
buffer.  If TO-BUFFER is the symbol `string', don't leave any
buffer behind but just return the resulting LaTeX as a string.
When BODY-ONLY is set, don't produce the file header and footer,
simply return the content of \begin{document}...\end{document},
without even the \begin{document} and \end{document} commands.
when PUB-DIR is set, use this as the publishing directory."
  (interactive "P")
  ;; Make sure we have a file name when we need it.
  (when (and (not (or to-buffer body-only))
	     (not buffer-file-name))
    (if (buffer-base-buffer)
	(org-set-local 'buffer-file-name
		       (with-current-buffer (buffer-base-buffer)
			 buffer-file-name))
      (error "Need a file name to be able to export")))

  (message "Exporting to LaTeX...")
  (remove-text-properties (point-min) (point-max)
			  '(:org-license-to-kill nil))
  (org-update-radio-target-regexp)
  (org-export-latex-set-initial-vars ext-plist arg)
  (let* ((wcf (current-window-configuration))
	 (opt-plist org-export-latex-options-plist)
	 (region-p (org-region-active-p))
	 (rbeg (and region-p (region-beginning)))
	 (rend (and region-p (region-end)))
	 (subtree-p
	  (when region-p
	    (save-excursion
	      (goto-char rbeg)
	      (and (org-at-heading-p)
		   (>= (org-end-of-subtree t t) rend)))))
	 (opt-plist (if subtree-p
			(org-export-add-subtree-options opt-plist rbeg)
		      opt-plist))
	 ;; Make sure the variable contains the updated values.
	 (org-export-latex-options-plist opt-plist)
	 (title (or (and subtree-p (org-export-get-title-from-subtree))
		    (plist-get opt-plist :title)
		    (and (not
			  (plist-get opt-plist :skip-before-1st-heading))
			 (org-export-grab-title-from-buffer))
		    (file-name-sans-extension
		     (file-name-nondirectory buffer-file-name))))
	 (filename (concat (file-name-as-directory
			    (or pub-dir
				(org-export-directory :LaTeX ext-plist)))
			   (file-name-sans-extension
			    (or (and subtree-p
				     (org-entry-get rbeg "EXPORT_FILE_NAME" t))
				(file-name-nondirectory ;sans-extension
				 buffer-file-name)))
			   ".tex"))
	 (filename (if (equal (file-truename filename)
			      (file-truename buffer-file-name))
		       (concat filename ".tex")
		     filename))
	 (buffer (if to-buffer
		     (cond
		      ((eq to-buffer 'string) (get-buffer-create
					       "*Org LaTeX Export*"))
		      (t (get-buffer-create to-buffer)))
		   (find-file-noselect filename)))
	 (odd org-odd-levels-only)
	 (header (org-export-latex-make-header title opt-plist))
	 (skip (cond (subtree-p nil)
		     (region-p nil)
		     (t (plist-get opt-plist :skip-before-1st-heading))))
	 (text (plist-get opt-plist :text))
	 (first-lines (if skip "" (org-export-latex-first-lines rbeg)))
	 (coding-system (and (boundp 'buffer-file-coding-system)
			     buffer-file-coding-system))
	 (coding-system-for-write (or org-export-latex-coding-system
				      coding-system))
	 (save-buffer-coding-system (or org-export-latex-coding-system
					coding-system))
	 (region (buffer-substring
		  (if region-p (region-beginning) (point-min))
		  (if region-p (region-end) (point-max))))
	 (string-for-export
	  (org-export-preprocess-string
	   region
	   :emph-multiline t
	   :for-LaTeX t
	   :comments nil
	   :tags (plist-get opt-plist :tags)
	   :priority (plist-get opt-plist :priority)
	   :todo-keywords (plist-get opt-plist :todo-keywords)
	   :add-text (if (eq to-buffer 'string) nil text)
	   :skip-before-1st-heading skip
	   :select-tags (plist-get opt-plist :select-tags)
	   :exclude-tags (plist-get opt-plist :exclude-tags)
	   :LaTeX-fragments nil)))

    (set-buffer buffer)
    (erase-buffer)

    (and (fboundp 'set-buffer-file-coding-system)
	 (set-buffer-file-coding-system coding-system-for-write))

    ;; insert the header and initial document commands
    (unless (or (eq to-buffer 'string) body-only)
      (insert header))

    ;; insert text found in #+TEXT
    (when (and text (not (eq to-buffer 'string)))
      (insert (org-export-latex-content
	       text '(lists tables fixed-width keywords))
	       "\n\n"))

    ;; insert lines before the first headline
    (unless (or skip (eq to-buffer 'string))
      (insert first-lines))

    ;; export the content of headlines
    (org-export-latex-global
     (with-temp-buffer
       (insert string-for-export)
       (goto-char (point-min))
       (when (re-search-forward "^\\(\\*+\\) " nil t)
	 (let* ((asters (length (match-string 1)))
		(level (if odd (- asters 2) (- asters 1))))
	   (setq org-export-latex-add-level
		 (if odd (1- (/ (1+ asters) 2)) (1- asters)))
	   (org-export-latex-parse-global level odd)))))

    ;; finalization
    (unless body-only (insert "\n\\end{document}"))
    (or to-buffer (save-buffer))
    (goto-char (point-min))
    (message "Exporting to LaTeX...done")
    (prog1
	(if (eq to-buffer 'string)
	    (prog1 (buffer-substring (point-min) (point-max))
	      (kill-buffer (current-buffer)))
	  (current-buffer))
      (set-window-configuration wcf))))

;;;###autoload
(defun org-export-as-pdf (arg &optional hidden ext-plist
			      to-buffer body-only pub-dir)
  "Export as LaTeX, then process through to PDF."
  (interactive "P")
  (message "Exporting to PDF...")
  (let* ((wconfig (current-window-configuration))
	 (lbuf (org-export-as-latex arg hidden ext-plist
				    to-buffer body-only pub-dir))
	 (file (buffer-file-name lbuf))
	 (base (file-name-sans-extension (buffer-file-name lbuf)))
	 (pdffile (concat base ".pdf")))
    (and (file-exists-p pdffile) (delete-file pdffile))
    (message "Processing LaTeX file...")
    (shell-command (format "pdflatex -interaction nonstopmode %s"
			   (shell-quote-argument file)))
    (shell-command (format "pdflatex -interaction nonstopmode %s"
			   (shell-quote-argument file)))
    (message "Processing LaTeX file...done")
    (if (not (file-exists-p pdffile))
	(error "PDF file was not produced")
      (set-window-configuration wconfig)
      (when org-export-pdf-remove-logfiles
	(dolist (ext '("aux" "log" "out" "toc"))
	  (setq file (concat base "." ext))
	  (and (file-exists-p file) (delete-file file))))
      (message "Exporting to PDF...done")
      pdffile)))

;;;###autoload
(defun org-export-as-pdf-and-open (arg)
  "Export as LaTeX, then process through to PDF, and open."
  (interactive "P")
  (let ((pdffile (org-export-as-pdf arg)))
    (if pdffile
	(org-open-file pdffile)
      (error "PDF file was not produced"))))

;;; Parsing functions:

(defun org-export-latex-parse-global (level odd)
  "Parse the current buffer recursively, starting at LEVEL.
If ODD is non-nil, assume the buffer only contains odd sections.
Return a list reflecting the document structure."
  (save-excursion
    (goto-char (point-min))
    (let* ((cnt 0) output
	   (depth org-export-latex-sectioning-depth))
      (while (re-search-forward
	      (concat "^\\(\\(?:\\*\\)\\{"
		      (number-to-string (+ (if odd 2 1) level))
		      "\\}\\) \\(.*\\)$")
	      ;; make sure that there is no upper heading
	      (when (> level 0)
		(save-excursion
		  (save-match-data
		    (re-search-forward
		     (concat "^\\(\\(?:\\*\\)\\{"
			     (number-to-string level)
			     "\\}\\) \\(.*\\)$") nil t)))) t)
	(setq cnt (1+ cnt))
	(let* ((pos (match-beginning 0))
	       (heading (match-string 2))
	       (nlevel (if odd (/ (+ 3 level) 2) (1+ level))))
	  (save-excursion
	    (narrow-to-region
	     (point)
	     (save-match-data
	       (if (re-search-forward
		    (concat "^\\(\\(?:\\*\\)\\{"
			    (number-to-string (+ (if odd 2 1) level))
			    "\\}\\) \\(.*\\)$") nil t)
		   (match-beginning 0)
		 (point-max))))
	    (goto-char (point-min))
	    (setq output
		  (append output
			  (list
			   (list
			    `(pos . ,pos)
			    `(level . ,nlevel)
			    `(occur . ,cnt)
			    `(heading . ,heading)
			    `(content . ,(org-export-latex-parse-content))
			    `(subcontent . ,(org-export-latex-parse-subcontent
					     level odd)))))))
	  (widen)))
      (list output))))

(defun org-export-latex-parse-content ()
  "Extract the content of a section."
  (let ((beg (point))
	(end (if (re-search-forward "^\\(\\*\\)+ .*$" nil t)
		 (progn (beginning-of-line) (point))
	       (point-max))))
    (buffer-substring beg end)))

(defun org-export-latex-parse-subcontent (level odd)
  "Extract the subcontent of a section at LEVEL.
If ODD Is non-nil, assume subcontent only contains odd sections."
  (if (not (re-search-forward
	    (concat "^\\(\\(?:\\*\\)\\{"
		    (number-to-string (+ (if odd 4 2) level))
		    "\\}\\) \\(.*\\)$")
	    nil t))
      nil ; subcontent is nil
    (org-export-latex-parse-global (+ (if odd 2 1) level) odd)))

;;; Rendering functions:
(defun org-export-latex-global (content)
  "Export CONTENT to LaTeX.
CONTENT is an element of the list produced by
`org-export-latex-parse-global'."
  (if (eq (car content) 'subcontent)
      (mapc 'org-export-latex-sub (cdr content))
    (org-export-latex-sub (car content))))

(defun org-export-latex-sub (subcontent)
  "Export the list SUBCONTENT to LaTeX.
SUBCONTENT is an alist containing information about the headline
and its content."
  (let ((num (plist-get org-export-latex-options-plist :section-numbers)))
    (mapc (lambda(x) (org-export-latex-subcontent x num)) subcontent)))

(defun org-export-latex-subcontent (subcontent num)
  "Export each cell of SUBCONTENT to LaTeX.
If NUM, export sections as numerical sections."
  (let* ((heading (org-export-latex-fontify-headline
		   (cdr (assoc 'heading subcontent))))
	 (level (- (cdr (assoc 'level subcontent))
		   org-export-latex-add-level))
	 (occur (number-to-string (cdr (assoc 'occur subcontent))))
	 (content (cdr (assoc 'content subcontent)))
	 (subcontent (cadr (assoc 'subcontent subcontent)))
	 (label (org-get-text-property-any 0 'target heading))
	 (label-list (cons label (cdr (assoc label
					     org-export-target-aliases)))))
    (cond
     ;; Normal conversion
     ((<= level org-export-latex-sectioning-depth)
      (let* ((sec (nth (1- level) org-export-latex-sectioning))
	     start end)
	(if (consp (cdr sec))
	    (setq start (nth (if num 0 2) sec)
		  end (nth (if num 1 3) sec))
	  (setq start (if num (car sec) (cdr sec))))
	(insert (format start heading) "\n")
	(when label
	  (insert (mapconcat (lambda (l) (format "\\label{%s}" l))
			     label-list "\n") "\n"))
	(insert (org-export-latex-content content))
	(cond ((stringp subcontent) (insert subcontent))
	      ((listp subcontent) (org-export-latex-sub subcontent)))
	(if end (insert end "\n"))))
     ;; At a level under the hl option: we can drop this subsection
     ((> level org-export-latex-sectioning-depth)
      (cond ((eq org-export-latex-low-levels 'description)
	     (insert (format "\\begin{description}\n\n\\item[%s]%s\n\n"
			     heading
			     (if label (format "\\label{%s}" label) "")))
	     (insert (org-export-latex-content content))
	     (cond ((stringp subcontent) (insert subcontent))
		   ((listp subcontent) (org-export-latex-sub subcontent)))
	     (insert "\\end{description}\n"))
	    ((stringp org-export-latex-low-levels)
	     (insert (format org-export-latex-low-levels heading) "\n")
	     (when label (insert (format "\\label{%s}\n" label)))
	     (insert (org-export-latex-content content))
	     (cond ((stringp subcontent) (insert subcontent))
		   ((listp subcontent) (org-export-latex-sub subcontent)))))))))

;;; Exporting internals:
(defun org-export-latex-set-initial-vars (ext-plist level)
  "Store org local variables required for LaTeX export.
EXT-PLIST is an optional additional plist.
LEVEL indicates the default depth for export."
  (setq org-export-latex-todo-keywords-1 org-todo-keywords-1
	org-export-latex-all-targets-re
	(org-make-target-link-regexp (org-all-targets))
	org-export-latex-options-plist
	(org-combine-plists (org-default-export-plist) ext-plist
			    (org-infile-export-plist))
	org-export-latex-class
	(save-excursion
	  (goto-char (point-min))
	  (if (and (re-search-forward "^#\\+LaTeX_CLASS:[ \t]*\\([a-zA-Z]+\\)" nil t)
		   (assoc (match-string 1) org-export-latex-classes))
	      (match-string 1)
	    org-export-latex-default-class))
	org-export-latex-header
	(cadr (assoc org-export-latex-class org-export-latex-classes))
	org-export-latex-sectioning
	(cddr (assoc org-export-latex-class org-export-latex-classes))
	org-export-latex-sectioning-depth
	(or level
	    (let ((hl-levels
		   (plist-get org-export-latex-options-plist :headline-levels))
		  (sec-depth (length org-export-latex-sectioning)))
	      (if (> hl-levels sec-depth) sec-depth hl-levels)))))

(defun org-export-latex-make-header (title opt-plist)
  "Make the LaTeX header and return it as a string.
TITLE is the current title from the buffer or region.
OPT-PLIST is the options plist for current buffer."
  (let ((toc (plist-get opt-plist :table-of-contents))
	(author (plist-get opt-plist :author)))
    (concat
     (if (plist-get opt-plist :time-stamp-file)
	 (format-time-string "%% Created %Y-%m-%d %a %H:%M\n"))
     ;; insert LaTeX custom header
     org-export-latex-header
     "\n"
     ;; insert information on LaTeX packages
     (when org-export-latex-packages-alist
       (mapconcat (lambda(p)
		    (if (equal "" (car p))
			(format "\\usepackage{%s}" (cadr p))
		      (format "\\usepackage[%s]{%s}"
			      (car p) (cadr p))))
		  org-export-latex-packages-alist "\n"))
     ;; insert additional commands in the header
     (plist-get opt-plist :latex-header-extra)
     org-export-latex-append-header
     ;; insert the title
     (format
      "\n\n\\title{%s}\n"
      ;; convert the title
      (org-export-latex-content
       title '(lists tables fixed-width keywords)))
     ;; insert author info
     (if (plist-get opt-plist :author-info)
	 (format "\\author{%s}\n"
		 (or author user-full-name))
       (format "%%\\author{%s}\n"
	       (or author user-full-name)))
     ;; insert the date
     (format "\\date{%s}\n"
	     (format-time-string
	      (or (plist-get opt-plist :date)
		  org-export-latex-date-format)))
     ;; beginning of the document
     "\n\\begin{document}\n\n"
     ;; insert the title command
     (if (string-match "%s" org-export-latex-title-command)
	 (format org-export-latex-title-command title)
       org-export-latex-title-command)
     "\n\n"
     ;; table of contents
     (when (and org-export-with-toc
		(plist-get opt-plist :section-numbers))
       (cond ((numberp toc)
	      (format "\\setcounter{tocdepth}{%s}\n\\tableofcontents\n\\vspace*{1cm}\n"
		      (min toc (plist-get opt-plist :headline-levels))))
	     (toc (format "\\setcounter{tocdepth}{%s}\n\\tableofcontents\n\\vspace*{1cm}\n"
			  (plist-get opt-plist :headline-levels))))))))

(defun org-export-latex-first-lines (&optional beg)
  "Export the first lines before first headline.
If BEG is non-nil, the is the beginning of he region."
  (save-excursion
    (goto-char (or beg (point-min)))
    (if (org-at-heading-p) (beginning-of-line 2))
    (let* ((pt (point))
	   (end (if (re-search-forward "^\\*+ " nil t)
		    (goto-char (match-beginning 0))
		  (goto-char (point-max)))))
      (prog1
	  (org-export-latex-content
	   (org-export-preprocess-string
	    (buffer-substring pt end)
	    :for-LaTeX t
	    :emph-multiline t
	    :add-text nil
	    :comments nil
	    :skip-before-1st-heading nil
	    :LaTeX-fragments nil))
	(add-text-properties pt (max pt (1- end))
			     '(:org-license-to-kill t))))))

(defun org-export-latex-content (content &optional exclude-list)
  "Convert CONTENT string to LaTeX.
Don't perform conversions that are in EXCLUDE-LIST.  Recognized
conversion types are: quotation-marks, emphasis, sub-superscript,
links, keywords, lists, tables, fixed-width"
  (with-temp-buffer
   (insert content)
   (unless (memq 'quotation-marks exclude-list)
     (org-export-latex-quotation-marks))
   (unless (memq 'emphasis exclude-list)
     (when (plist-get org-export-latex-options-plist :emphasize)
       (org-export-latex-fontify)))
   (unless (memq 'sub-superscript exclude-list)
     (org-export-latex-special-chars
      (plist-get org-export-latex-options-plist :sub-superscript)))
   (unless (memq 'links exclude-list)
     (org-export-latex-links))
   (unless (memq 'keywords exclude-list)
     (org-export-latex-keywords
      (plist-get org-export-latex-options-plist :timestamps)))
   (unless (memq 'lists exclude-list)
     (org-export-latex-lists))
   (unless (memq 'tables exclude-list)
     (org-export-latex-tables
      (plist-get org-export-latex-options-plist :tables)))
   (unless (memq 'fixed-width exclude-list)
     (org-export-latex-fixed-width
      (plist-get org-export-latex-options-plist :fixed-width)))
   ;; return string
   (buffer-substring (point-min) (point-max))))

(defun org-export-latex-protect-string (s)
  "Add the org-protected property to string S."
  (add-text-properties 0 (length s) '(org-protected t) s) s)

(defun org-export-latex-protect-char-in-string (char-list string)
  "Add org-protected text-property to char from CHAR-LIST in STRING."
  (with-temp-buffer
    (save-match-data
      (insert string)
      (goto-char (point-min))
      (while (re-search-forward (regexp-opt char-list) nil t)
	(add-text-properties (match-beginning 0)
			     (match-end 0) '(org-protected t)))
      (buffer-string))))

(defun org-export-latex-keywords-maybe (remove-list)
  "Maybe remove keywords depending on rules in REMOVE-LIST."
  (goto-char (point-min))
  (let ((re-todo (mapconcat 'identity org-export-latex-todo-keywords-1 "\\|"))
	(case-fold-search nil))
    ;; convert TODO keywords
    (when (re-search-forward (concat "^\\(" re-todo "\\)") nil t)
      (if (plist-get remove-list :todo)
	  (replace-match "")
	(replace-match (format "\\texttt{%s}" (match-string 1)) t t)))
    ;; convert priority string
    (when (re-search-forward "\\[\\\\#.\\]" nil t)
      (if (plist-get remove-list :priority)
	  (replace-match "")
	(replace-match (format "\\texttt{%s}" (match-string 0)) t t)))
    ;; convert tags
    (when (re-search-forward "\\(:[a-zA-Z0-9_@]+\\)+:" nil t)
      (if (or (not org-export-with-tags)
	      (plist-get remove-list :tags))
	  (replace-match "")
	(replace-match
	 (org-export-latex-protect-string
	  (format "\\texttt{%s}"
		  (save-match-data
		    (replace-regexp-in-string
		     "_" "\\\\_" (match-string 0)))))
	 t t)))))

(defun org-export-latex-fontify-headline (string)
  "Fontify special words in STRING."
  (with-temp-buffer
    ;; FIXME: org-inside-LaTeX-fragment-p doesn't work when the $...$ is at
    ;; the beginning of the buffer - inserting "\n" is safe here though.
    (insert "\n" string)
    (goto-char (point-min))
    (when (plist-get org-export-latex-options-plist :emphasize)
      (org-export-latex-fontify))
    (org-export-latex-keywords-maybe
     org-export-latex-remove-from-headlines)
    (org-export-latex-special-chars
     (plist-get org-export-latex-options-plist :sub-superscript))
    (org-export-latex-links)
;    (org-trim (buffer-substring-no-properties (point-min) (point-max)))))
    (org-trim (buffer-string))))

(defun org-export-latex-quotation-marks ()
  "Export quotation marks depending on language conventions."
  (let* ((lang (plist-get org-export-latex-options-plist :language))
	 (quote-rpl (if (equal lang "fr")
			'(("\\(\\s-\\)\"" "«~")
			  ("\\(\\S-\\)\"" "~»")
			  ("\\(\\s-\\)'" "`"))
		      '(("\\(\\s-\\)\"" "``")
			("\\(\\S-\\)\"" "''")
			("\\(\\s-\\)'" "`")))))
    (mapc (lambda(l) (goto-char (point-min))
	    (while (re-search-forward (car l) nil t)
	      (let ((rpl (concat (match-string 1) (cadr l))))
		(org-export-latex-protect-string rpl)
		(org-if-unprotected
		 (replace-match rpl t t))))) quote-rpl)))

(defun org-export-latex-special-chars (sub-superscript)
  "Export special characters to LaTeX.
If SUB-SUPERSCRIPT is non-nil, convert \\ and ^.
See the `org-export-latex.el' code for a complete conversion table."
  (goto-char (point-min))
  (mapc (lambda(c)
	  (goto-char (point-min))
	  (while (re-search-forward c nil t)
	    ;; Put the point where to check for org-protected
;	    (unless (or (get-text-property (match-beginning 2) 'org-protected);
;			(org-at-table-p))
	    (unless (get-text-property (match-beginning 2) 'org-protected)
	      (cond ((member (match-string 2) '("\\$" "$"))
		     (if (equal (match-string 2) "\\$")
			 (replace-match (concat (match-string 1) "$"
						(match-string 3)) t t)
		       (replace-match (concat (match-string 1) "\\$"
					      (match-string 3)) t t)))
		    ((member (match-string 2) '("&" "%" "#"))
		     (if (equal (match-string 1) "\\")
			 (replace-match (match-string 2) t t)
		       (replace-match (concat (match-string 1) "\\"
					      (match-string 2)) t t)))
		    ((equal (match-string 2) "...")
		     (replace-match
		      (concat (match-string 1)
			      (org-export-latex-protect-string "\\ldots{}")) t t))
		    ((equal (match-string 2) "~")
		     (cond ((equal (match-string 1) "\\") nil)
			   ((eq 'org-link (get-text-property 0 'face (match-string 2)))
			    (replace-match (concat (match-string 1) "\\~") t t))
			   (t (replace-match
			       (org-export-latex-protect-string
				(concat (match-string 1) "\\~{}")) t t))))
		    ((member (match-string 2) '("{" "}"))
		     (unless (save-match-data (org-inside-LaTeX-fragment-p))
		       (if (equal (match-string 1) "\\")
			   (replace-match (match-string 2) t t)
			 (replace-match (concat (match-string 1) "\\"
						(match-string 2)) t t)))))
	      (unless (save-match-data (org-inside-LaTeX-fragment-p))
		(cond ((equal (match-string 2) "\\")
		       (replace-match (or (save-match-data
					    (org-export-latex-treat-backslash-char
					     (match-string 1)
					     (match-string 3))) "") t t))
		      ((member (match-string 2) '("_" "^"))
		       (replace-match (or (save-match-data
					    (org-export-latex-treat-sub-super-char
					     sub-superscript
					     (match-string 2)
					     (match-string 1)
					     (match-string 3))) "") t t)))))))
	'("^\\([^\n$]*?\\|^\\)\\(\\\\?\\$\\)\\([^\n$]*\\)$"
	  "\\([a-za-z0-9]+\\|[ \t\n]\\|\\b\\|\\\\\\)\\(_\\|\\^\\)\\([a-za-z0-9]+\\|[ \t\n]\\|[:punct:]\\|{[a-za-z0-9]+}\\|([a-za-z0-9]+)\\)"
	  "\\(.\\|^\\)\\(\\\\\\)\\([ \t\n]\\|[a-zA-Z&#%{}\"]+\\)"
	  "\\(.\\|^\\)\\(&\\)"
	  "\\(.\\|^\\)\\(#\\)"
	  "\\(.\\|^\\)\\(%\\)"
	  "\\(.\\|^\\)\\({\\)"
	  "\\(.\\|^\\)\\(}\\)"
	  "\\(.\\|^\\)\\(~\\)"
	  "\\(.\\|^\\)\\(\\.\\.\\.\\)"
	  ;; (?\< . "\\textless{}")
	  ;; (?\> . "\\textgreater{}")
	  )))

(defun org-export-latex-treat-sub-super-char
  (subsup char string-before string-after)
  "Convert the \"_\" and \"^\" characters to LaTeX.
SUBSUP corresponds to the ^: option in the #+OPTIONS line.
Convert CHAR depending on STRING-BEFORE and STRING-AFTER."
  (cond ((equal string-before "\\")
	 (concat string-before char string-after))
	;; this is part of a math formula
	((and (string-match "\\S-+" string-before)
	      (string-match "\\S-+" string-after))
	 (cond ((eq 'org-link (get-text-property 0 'face char))
		(concat string-before "\\" char string-after))
	       ((save-match-data (org-inside-LaTeX-fragment-p))
		(if subsup
		    (cond ((eq 1 (length string-after))
			   (concat string-before char string-after))
			  ((string-match "[({]?\\([^)}]+\\)[)}]?" string-after)
			   (format "%s%s{%s}" string-before char
				   (match-string 1 string-after))))))
	       ((and (> (length string-after) 1)
		     (or (eq subsup t)
			 (and (equal subsup '{}) (eq (string-to-char string-after) ?\{)))
		     (string-match "[({]?\\([^)}]+\\)[)}]?" string-after))
		(format "%s$%s{%s}$" string-before char
			(if (> (match-end 1) (1+ (match-beginning 1)))
			    (concat "\\mathrm{" (match-string 1 string-after) "}")
			(match-string 1 string-after))))
	       ((eq subsup t) (concat string-before "$" char string-after "$"))
	       (t (org-export-latex-protect-string
		   (concat string-before "\\" char "{}" string-after)))))
	(t (org-export-latex-protect-string
	    (concat string-before "\\" char "{}" string-after)))))

(defun org-export-latex-treat-backslash-char (string-before string-after)
  "Convert the \"$\" special character to LaTeX.
The conversion is made depending of STRING-BEFORE and STRING-AFTER."
  (cond ((member (list string-after) org-html-entities)
	 ;; backslash is part of a special entity (like "\alpha")
	 (concat string-before "$\\"
		 (or (cdar (member (list string-after) org-html-entities))
		     string-after) "$"))
	((and (not (string-match "^[ \n\t]" string-after))
	      (not (string-match "[ \t]\\'\\|^" string-before)))
	 ;; backslash is inside a word
	 (org-export-latex-protect-string
	  (concat string-before "\\textbackslash{}" string-after)))
	((not (or (equal string-after "")
		  (string-match "^[ \t\n]" string-after)))
	 ;; backslash might escape a character (like \#) or a user TeX
	 ;; macro (like \setcounter)
	 (org-export-latex-protect-string
	  (concat string-before "\\" string-after)))
	((and (string-match "^[ \t\n]" string-after)
	      (string-match "[ \t\n]\\'" string-before))
	 ;; backslash is alone, convert it to $\backslash$
	 (org-export-latex-protect-string
	  (concat string-before "\\textbackslash{}" string-after)))
	(t (org-export-latex-protect-string
	    (concat string-before "\\textbackslash{}" string-after)))))

(defun org-export-latex-keywords (timestamps)
  "Convert special keywords to LaTeX.
Regexps are those from `org-export-latex-special-string-regexps'.
If TIMESTAMPS, convert timestamps, otherwise delete them."
  (let ((rg org-export-latex-special-string-regexps) r)
    (while (setq r (pop rg))
      (goto-char (point-min))
      (while (re-search-forward (eval r) nil t)
	(if (not timestamps)
	    (replace-match (format "\\\\texttt{%s}" (match-string 0)) t)
	  (replace-match ""))))))

(defun org-export-latex-fixed-width (opt)
  "When OPT is non-nil convert fixed-width sections to LaTeX."
  (goto-char (point-min))
  (while (re-search-forward "^[ \t]*:" nil t)
    (if opt
	(progn (goto-char (match-beginning 0))
	       (insert "\\begin{verbatim}\n")
	       (while (looking-at "^\\([ \t]*\\):\\(.*\\)$")
		 (replace-match (concat (match-string 1)
					(match-string 2)) t t)
		 (forward-line))
	       (insert "\\end{verbatim}\n\n"))
      (progn (goto-char (match-beginning 0))
	     (while (looking-at "^\\([ \t]*\\):\\(.*\\)$")
	       (replace-match (concat "%" (match-string 1)
				      (match-string 2)) t t)
	       (forward-line))))))


(defvar org-table-last-alignment) ; defined in org-table.el
(declare-function orgtbl-to-latex "org-table" (table params) t)
(defun org-export-latex-tables (insert)
  "Convert tables to LaTeX and INSERT it."
  (goto-char (point-min))
  (while (re-search-forward "^\\([ \t]*\\)|" nil t)
    ;; FIXME really need to save-excursion?
    (save-excursion (org-table-align))
    (let* ((beg (org-table-begin))
	   (end (org-table-end))
	   (raw-table (buffer-substring beg end))
	   fnum fields line lines olines gr colgropen line-fmt align
	   caption label attr floatp longtblp)
      (if org-export-latex-tables-verbatim
	  (let* ((tbl (concat "\\begin{verbatim}\n" raw-table
			      "\\end{verbatim}\n")))
	    (apply 'delete-region (list beg end))
	    (insert (org-export-latex-protect-string tbl)))
	(progn
	  (setq caption (org-find-text-property-in-string
			 'org-caption raw-table)
		attr (org-find-text-property-in-string
		      'org-attributes raw-table)
		label (org-find-text-property-in-string
		       'org-label raw-table)
		longtblp (and attr (stringp attr)
			      (string-match "\\<longtable\\>" attr))
		align (and attr (stringp attr)
			   (string-match "\\<align=\\([^ \t\n\r,]+\\)" attr)
			   (match-string 1 attr))
		floatp (or caption label))
	  (setq lines (split-string raw-table "\n" t))
	  (apply 'delete-region (list beg end))
	  (when org-export-table-remove-special-lines
	    (setq lines (org-table-clean-before-export lines)))
	  ;; make a formatting string to reflect aligment
	  (setq olines lines)
	  (while (and (not line-fmt) (setq line (pop olines)))
	    (unless (string-match "^[ \t]*|-" line)
	      (setq fields (org-split-string line "[ \t]*|[ \t]*"))
	      (setq fnum (make-vector (length fields) 0))
	      (setq line-fmt
		    (mapconcat
		     (lambda (x)
		       (setq gr (pop org-table-colgroup-info))
		       (format "%s%%s%s"
			       (cond ((eq gr ':start)
				      (prog1 (if colgropen "|" "")
					(setq colgropen t)))
				     ((eq gr ':startend)
				      (prog1 (if colgropen "|" "|")
					(setq colgropen nil)))
				     (t ""))
			       (if (memq gr '(:end :startend))
				   (progn (setq colgropen nil) "|")
				 "")))
		     fnum ""))))
	  ;; fix double || in line-fmt
	  (setq line-fmt (replace-regexp-in-string "||" "|" line-fmt))
	  ;; maybe remove the first and last "|"
	  (when (and (not org-export-latex-tables-column-borders)
		     (string-match "^\\(|\\)?\\(.+\\)|$" line-fmt))
	    (setq line-fmt (match-string 2 line-fmt)))
	  ;; format alignment
	  (unless align
	    (setq align (apply 'format
			       (cons line-fmt
				     (mapcar (lambda (x) (if x "r" "l"))
					     org-table-last-alignment)))))
	  ;; prepare the table to send to orgtbl-to-latex
	  (setq lines
		(mapcar
		 (lambda(elem)
		   (or (and (string-match "[ \t]*|-+" elem) 'hline)
		       (split-string (org-trim elem) "|" t)))
		 lines))
	  (when insert
	    (insert (org-export-latex-protect-string
		     (concat
		      (if longtblp
			  (concat "\\begin{longtable}{" align "}\n")
			(if floatp "\\begin{table}[htb]\n"))
		      (if (or floatp longtblp)
			  (format
			   "\\caption{%s%s}"
			   (if label (concat "\\\label{" label "}") "")
			   (or caption "")))
		      (if longtblp "\\\\\n" "\n")
		      (if (not longtblp) "\\begin{center}\n")
		      (if (not longtblp) (concat "\\begin{tabular}{" align "}\n"))
		      (orgtbl-to-latex
		       lines
		       `(:tstart nil :tend nil
				 :hlend ,(if longtblp
					     (format "\\\\
\\hline
\\endhead
\\hline\\multicolumn{%d}{r}{Continued on next page}\\
\\endfoot
\\endlastfoot" (length org-table-last-alignment))
					   nil)))
		      (if (not longtblp) (concat "\n\\end{tabular}"))
		      (if longtblp "\n" "\n\\end{center}\n")
		      (if longtblp
			  "\\end{longtable}"
			(if floatp "\\end{table}"))))
		    "\n\n")))))))

(defun org-export-latex-fontify ()
  "Convert fontification to LaTeX."
  (goto-char (point-min))
  (while (re-search-forward org-emph-re nil t)
    ;; The match goes one char after the *string*
    (let ((emph (assoc (match-string 3)
		       org-export-latex-emphasis-alist))
	  rpl)
      (unless (get-text-property (1- (point)) 'org-protected)
	(setq rpl (concat (match-string 1)
			  (format (org-export-latex-protect-char-in-string
				   '("\\" "{" "}") (cadr emph))
				  (match-string 4))
			  (match-string 5)))
	(if (caddr emph)
	    (setq rpl (org-export-latex-protect-string rpl)))
	(replace-match rpl t t)))
    (backward-char)))

(defun org-export-latex-links ()
  ;; Make sure to use the LaTeX hyperref and graphicx package
  ;; or send some warnings.
  "Convert links to LaTeX."
  (goto-char (point-min))
  (while (re-search-forward org-bracket-link-analytic-regexp nil t)
    (org-if-unprotected
     (goto-char (match-beginning 0))
     (let* ((re-radio org-export-latex-all-targets-re)
	    (remove (list (match-beginning 0) (match-end 0)))
	    (raw-path (org-extract-attributes (match-string 3)))
	    (full-raw-path (concat (match-string 1) raw-path))
	    (desc (match-string 5))
	    (type (or (match-string 2)
		      (if (or (file-name-absolute-p raw-path)
			      (string-match "^\\.\\.?/" raw-path))
			  "file")))
	    (caption (org-find-text-property-in-string 'org-caption raw-path))
	    (attr (org-find-text-property-in-string 'org-attributes raw-path))
	    (label (org-find-text-property-in-string 'org-label raw-path))
	    (floatp (or label caption))
	    imgp radiop
	    ;; define the path of the link
	    (path (cond
		   ((member type '("http" "https" "ftp"))
		    (concat type ":" raw-path))
		   ((and re-radio (string-match re-radio raw-path))
		    (setq radiop t))
		   ((equal type "mailto")
		    (concat type ":" raw-path))
		   ((equal type "file")
		    (if (and (or (org-file-image-p (expand-file-name raw-path))
				 (string-match "\\.\\(pdf\\|jpg\\|ps\\|eps\\)$"
					       raw-path))
			     (equal desc full-raw-path))
			(setq imgp t)
		      (progn (when (string-match "\\(.+\\)::.+" raw-path)
			       (setq raw-path (match-string 1 raw-path)))
			     (if (file-exists-p raw-path)
				 (concat type "://" (expand-file-name raw-path))
			       (concat type "://" (org-export-directory
						   :LaTeX org-export-latex-options-plist)
				       raw-path))))))))
       ;; process with link inserting
       (apply 'delete-region remove)
       (cond ((and imgp (plist-get org-export-latex-options-plist :inline-images))
	      (insert
	       (concat
		(if floatp "\\begin{figure}[htb]\n")
		(format "\\centerline{\\includegraphics[%s]{%s}}\n"
			(or attr org-export-latex-image-default-option)
			(expand-file-name raw-path))
		(if floatp
		    (format "\\caption{%s%s}\n"
			    (if label (concat "\\label{" label "}") "")
			    (or caption "")))
		(if floatp "\\end{figure}\n"))))
	     (radiop (insert (format "\\hyperref[%s]{%s}"
				     (org-solidify-link-text raw-path) desc)))
	     ((not type)
	      (insert (format "\\hyperref[%s]{%s}"
			      (org-solidify-link-text raw-path) desc)))
	     (path (insert (format "\\href{%s}{%s}" path desc)))
	     (t (insert "\\texttt{" desc "}")))))))

(defvar org-latex-entities)   ; defined below
(defvar org-latex-entities-regexp)   ; defined below

(defun org-export-latex-preprocess ()
  "Clean stuff in the LaTeX export."
  ;; Preserve line breaks
  (goto-char (point-min))
  (while (re-search-forward "\\\\\\\\" nil t)
    (add-text-properties (match-beginning 0) (match-end 0)
			 '(org-protected t)))

  ;; Preserve latex environments
  (goto-char (point-min))
  (while (re-search-forward "^[ \t]*\\begin{\\([a-zA-Z]+\\)}" nil t)
    (let* ((start (progn (beginning-of-line) (point)))
	   (end (or (and (re-search-forward
			  (concat "^[ \t]*\\end{" (match-string 1) "}" nil t)
			  (point-at-eol)))
		    (point-max))))
      (add-text-properties start end '(org-protected t))))

  ;; Convert LaTeX to \LaTeX{}
  (goto-char (point-min))
  (let ((case-fold-search nil) rpl)
    (while (re-search-forward "\\([^+_]\\)LaTeX" nil t)
    (replace-match (org-export-latex-protect-string
		    (concat (match-string 1) "\\LaTeX{}")) t t)))

  ;; Convert blockquotes
  (goto-char (point-min))
  (while (search-forward "ORG-BLOCKQUOTE-START" nil t)
    (replace-match "\\begin{quote}" t t))
  (goto-char (point-min))
  (while (search-forward "ORG-BLOCKQUOTE-END" nil t)
    (replace-match "\\end{quote}" t t))

  ;; Convert verse
  (goto-char (point-min))
  (while (search-forward "ORG-VERSE-START" nil t)
    (replace-match "\\begin{verse}" t t))
  (goto-char (point-min))
  (while (search-forward "ORG-VERSE-END" nil t)
    (replace-match "\\end{verse}" t t))

  ;; Convert horizontal rules
  (goto-char (point-min))
  (while (re-search-forward "^----+.$" nil t)
    (replace-match (org-export-latex-protect-string "\\hrule") t t))

  ;; Protect LaTeX commands like \command[...]{...} or \command{...}
  (goto-char (point-min))
  (while (re-search-forward "\\\\[a-zA-Z]+\\(?:\\[.*\\]\\)?{.*}" nil t)
    (add-text-properties (match-beginning 0) (match-end 0)
			 '(org-protected t)))

  ;; Protect LaTeX entities
  (goto-char (point-min))
  (while (re-search-forward org-latex-entities-regexp nil t)
    (add-text-properties (match-beginning 0) (match-end 0)
			 '(org-protected t)))

  ;; Replace radio links
  (goto-char (point-min))
  (while (re-search-forward
	  (concat "<<<?" org-export-latex-all-targets-re
		  ">>>?\\((INVISIBLE)\\)?") nil t)
    (replace-match
     (org-export-latex-protect-string
      (format "\\label{%s}%s" (save-match-data (org-solidify-link-text
						(match-string 1)))
	      (if (match-string 2) "" (match-string 1)))) t t))

  ;; Delete @<...> constructs
  ;; Thanks to Daniel Clemente for this regexp
  (goto-char (point-min))
  (while (re-search-forward "@<\\(?:[^\"\n]\\|\".*\"\\)*?>" nil t)
    (replace-match ""))

  ;; When converting to LaTeX, replace footnotes
  ;; FIXME: don't protect footnotes from conversion
  (when (plist-get org-export-latex-options-plist :footnotes)
    (goto-char (point-min))
    (while (re-search-forward "\\[[0-9]+\\]" nil t)
      (when (save-match-data
	      (save-excursion (beginning-of-line)
			      (looking-at "[^:|#]")))
	(let ((foot-beg (match-beginning 0))
	      (foot-end (match-end 0))
	      (foot-prefix (match-string 0))
	      footnote footnote-rpl)
	  (save-excursion
	    (when (search-forward foot-prefix nil t)
	      (replace-match "")
	      (let ((end (save-excursion
			   (if (re-search-forward "^$\\|^#.*$\\|\\[[0-9]+\\]" nil t)
			       (match-beginning 0) (point-max)))))
		(setq footnote (concat (org-trim (buffer-substring (point) end))
				       " ")) ; prevent last } being part of a link
		(delete-region (point) end))
	      (goto-char foot-beg)
	    (delete-region foot-beg foot-end)
	    (unless (null footnote)
	      (setq footnote-rpl (format "\\footnote{%s}" footnote))
	      (add-text-properties 0 10 '(org-protected t) footnote-rpl)
	      (add-text-properties (1- (length footnote-rpl))
				   (length footnote-rpl)
				   '(org-protected t) footnote-rpl)
	      (insert footnote-rpl)))))))

    ;; Replace footnote section tag for LaTeX
    (goto-char (point-min))
    (while (re-search-forward
	    (concat "^" footnote-section-tag-regexp) nil t)
      (replace-match ""))))

;;; List handling:

(defun org-export-latex-lists ()
  "Replace plain text lists in current buffer into LaTeX lists."
  "Convert lists to LaTeX."
  (goto-char (point-min))
  (while (re-search-forward org-list-beginning-re nil t)
    (org-if-unprotected
     (beginning-of-line)
     (insert (org-list-to-latex (org-list-parse-list t)) "\n"))))

(defconst org-latex-entities
 '("\\!"
   "\\'"
   "\\+"
   "\\,"
   "\\-"
   "\\:"
   "\\;"
   "\\<"
   "\\="
   "\\>"
   "\\Huge"
   "\\LARGE"
   "\\Large"
   "\\Styles"
   "\\\\"
   "\\`"
   "\\addcontentsline"
   "\\address"
   "\\addtocontents"
   "\\addtocounter"
   "\\addtolength"
   "\\addvspace"
   "\\alph"
   "\\appendix"
   "\\arabic"
   "\\author"
   "\\begin{array}"
   "\\begin{center}"
   "\\begin{description}"
   "\\begin{enumerate}"
   "\\begin{eqnarray}"
   "\\begin{equation}"
   "\\begin{figure}"
   "\\begin{flushleft}"
   "\\begin{flushright}"
   "\\begin{itemize}"
   "\\begin{list}"
   "\\begin{minipage}"
   "\\begin{picture}"
   "\\begin{quotation}"
   "\\begin{quote}"
   "\\begin{tabbing}"
   "\\begin{table}"
   "\\begin{tabular}"
   "\\begin{thebibliography}"
   "\\begin{theorem}"
   "\\begin{titlepage}"
   "\\begin{verbatim}"
   "\\begin{verse}"
   "\\bf"
   "\\bf"
   "\\bibitem"
   "\\bigskip"
   "\\cdots"
   "\\centering"
   "\\circle"
   "\\cite"
   "\\cleardoublepage"
   "\\clearpage"
   "\\cline"
   "\\closing"
   "\\dashbox"
   "\\date"
   "\\ddots"
   "\\dotfill"
   "\\em"
   "\\fbox"
   "\\flushbottom"
   "\\fnsymbol"
   "\\footnote"
   "\\footnotemark"
   "\\footnotesize"
   "\\footnotetext"
   "\\frac"
   "\\frame"
   "\\framebox"
   "\\hfill"
   "\\hline"
   "\\hrulespace"
   "\\hspace"
   "\\huge"
   "\\hyphenation"
   "\\include"
   "\\includeonly"
   "\\indent"
   "\\input"
   "\\it"
   "\\kill"
   "\\label"
   "\\large"
   "\\ldots"
   "\\line"
   "\\linebreak"
   "\\linethickness"
   "\\listoffigures"
   "\\listoftables"
   "\\location"
   "\\makebox"
   "\\maketitle"
   "\\mark"
   "\\mbox"
   "\\medskip"
   "\\multicolumn"
   "\\multiput"
   "\\newcommand"
   "\\newcounter"
   "\\newenvironment"
   "\\newfont"
   "\\newlength"
   "\\newline"
   "\\newpage"
   "\\newsavebox"
   "\\newtheorem"
   "\\nocite"
   "\\nofiles"
   "\\noindent"
   "\\nolinebreak"
   "\\nopagebreak"
   "\\normalsize"
   "\\onecolumn"
   "\\opening"
   "\\oval"
   "\\overbrace"
   "\\overline"
   "\\pagebreak"
   "\\pagenumbering"
   "\\pageref"
   "\\pagestyle"
   "\\par"
   "\\parbox"
   "\\put"
   "\\raggedbottom"
   "\\raggedleft"
   "\\raggedright"
   "\\raisebox"
   "\\ref"
   "\\rm"
   "\\roman"
   "\\rule"
   "\\savebox"
   "\\sc"
   "\\scriptsize"
   "\\setcounter"
   "\\setlength"
   "\\settowidth"
   "\\sf"
   "\\shortstack"
   "\\signature"
   "\\sl"
   "\\small"
   "\\smallskip"
   "\\sqrt"
   "\\tableofcontents"
   "\\telephone"
   "\\thanks"
   "\\thispagestyle"
   "\\tiny"
   "\\title"
   "\\tt"
   "\\twocolumn"
   "\\typein"
   "\\typeout"
   "\\underbrace"
   "\\underline"
   "\\usebox"
   "\\usecounter"
   "\\value"
   "\\vdots"
   "\\vector"
   "\\verb"
   "\\vfill"
   "\\vline"
   "\\vspace")
 "A list of LaTeX commands to be protected when performing conversion.")

(defconst org-latex-entities-regexp
  (let (names rest)
    (dolist (x org-latex-entities)
      (if (string-match "[a-z][A-Z]$" x)
	  (push x names)
	(push x rest)))
    (concat "\\(" (regexp-opt (nreverse names)) "\\>\\)"
	    "\\|\\(" (regexp-opt (nreverse rest)) "\\)")))

(provide 'org-export-latex)

;; arch-tag: 23c2b87d-da04-4c2d-ad2d-1eb6487bc3ad

;;; org-export-latex.el ends here
debug log:

solving fa6a0e4 ...
found fa6a0e4 in https://list.orgmode.org/orgmode/a6af35440812201649n66333f7fvf83cf06ca66b2802@mail.gmail.com/
found 9af4d0a in https://git.savannah.gnu.org/cgit/emacs/org-mode.git
preparing index
index prepared:
100644 9af4d0a86ee0d5fa6c711a67b94619855bb122a9	lisp/org-export-latex.el

applying [1/1] https://list.orgmode.org/orgmode/a6af35440812201649n66333f7fvf83cf06ca66b2802@mail.gmail.com/
diff --git a/lisp/org-export-latex.el b/lisp/org-export-latex.el
index 9af4d0a..fa6a0e4 100644

Checking patch lisp/org-export-latex.el...
Applied patch lisp/org-export-latex.el cleanly.

index at:
100644 fa6a0e4643eeae675cdc6be37617d33a5a80187a	lisp/org-export-latex.el

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