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+;;; org-export-latex.el --- LaTeX exporter for Org-mode
+;; Copyright (C) 2007 Free Software Foundation, Inc.
+;;
+;; Author: Bastien Guerry <bzg AT altern DOT org>
+;; Version: $Id: org-export-latex.el,v 0.26a 2007/08/21 14:46:58 guerry Exp guerry $
+;; Keywords: org organizer latex export convert
+;; X-URL: <http://www.cognition.ens.fr/~guerry/u/org-export-latex.el>
+;;
+;; This file is part of GNU Emacs.
+;;
+;; 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 2, 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 this program; if not, write to the Free Software
+;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;;; Commentary:
+
+;; This library is 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-latex-batch'
+;; M-x `org-export-as-latex-to-buffer'
+;; M-x `org-export-region-as-latex'
+;; M-x `org-replace-region-by-latex'
+
+;;; History:
+;; 
+;; I started this piece of code in may 2007. Special thanks to Carsten
+;; Dominik for helping me on this.
+;; 
+
+;;; Code:
+
+(require 'org)
+(require 'footnote)
+
+(defvar org-latex-options-plist nil)
+(defvar org-latex-todo-keywords-1 nil)
+(defvar org-latex-all-targets-regexp nil)
+(defvar org-latex-add-level 0)
+(defvar org-latex-sectioning-depth 0)
+
+(defvar org-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.")
+
+(defcustom org-export-latex-sectioning-alist
+  '((1 "\\section{%s}" "\\section*{%s}")
+    (2 "\\subsection{%s}" "\\subsection*{%s}")
+    (3 "\\subsubsection{%s}" "\\subsubsection*{%s}")
+    (4 "\\paragraph{%s}" "\\paragraph*{%s}")
+    (5 "\\subparagraph{%s}" "\\subparagraph*{%s}"))
+  "Alist of LaTeX commands for inserting sections.
+Here is the structure of each cell:
+
+  \(level unnumbered-section numbered-section\)
+
+The %s formatter will be replaced by the title of the section."
+  :group 'org-export-latex
+  :type 'alist)
+
+(defcustom org-export-latex-emphasis-alist
+  '(("*" "\\textbf{%s}")
+    ("/" "\\emph{%s}")
+    ("_" "\\underline{%s}")
+    ("+" "\\texttt{%s}")
+    ("=" "\\texttt{%s}"))
+  "Alist of LaTeX expressions to convert emphasis fontifiers."
+  :group 'org-export-latex
+  :type 'alist)
+
+(defcustom org-export-latex-preamble
+  "\\documentclass[11pt,a4paper]{article}
+\\usepackage[utf8]{inputenc}
+\\usepackage[T1]{fontenc}
+\\usepackage{hyperref}"
+  "Preamble to be inserted at the very beginning of the LaTeX export."
+  :group 'org-export-latex
+  :type 'string)
+
+(defcustom org-export-latex-date-format nil
+  "Format string for \\date{...}."
+  :group 'org-export-latex
+  :type 'string)
+
+(defcustom org-export-latex-packages-alist nil
+  "Alist of packages to be inserted in the preamble.
+Each cell is of the forma \( option . package \).
+
+For example:
+
+\(setq org-export-latex-packages-alist
+      '((\"french\" \"babel\"))"
+  :group 'org-export-latex
+  :type 'alist)
+
+(defcustom org-export-latex-low-levels 'description
+  "Choice for converting sections that are below the current
+admitted level of sectioning. This can be either nil (ignore the
+sections), 'description (convert them as description lists) or a
+string to be used instead of \\section{%s} (a %s for inserted the
+headline 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-headines
+  '(: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-quotation-marks-convention "en"
+  "Convention for conversion of the quotation marks.
+This value is overriden by any infile language setup."
+  :group 'org-export-latex
+  :type '(choice (string :tag "english" "en")
+                 (string :tag "french" "fr")))
+
+(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)
+
+;; FIXME Do we want this one?
+;; (defun org-export-as-latex-and-open (arg) ...)
+
+;;;###autoload
+(defun org-export-as-latex-batch ()
+  "Call `org-export-as-latex', may be used in batch processing as
+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-exort-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)
+  "Export current buffer to a LaTeX file."
+  (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...")
+  (org-update-radio-target-regexp)
+  (org-export-latex-set-initial-vars ext-plist)
+  (let* ((opt-plist org-latex-options-plist)
+         (filename (concat (file-name-as-directory
+                            (org-export-directory :LaTeX ext-plist))
+                           (file-name-sans-extension
+                            (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)))
+         (region-p (org-region-active-p))
+         (odd org-odd-levels-only)
+         (preamble (org-export-latex-make-preamble opt-plist))
+         (skip (plist-get opt-plist :skip-before-1st-heading))
+         (text (plist-get opt-plist :text))
+         (first-lines (if skip "" (org-export-latex-first-lines)))
+         (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
+          ;; FIXME Use org-cleaned-string-for-export instead, only when
+          ;; everyone uses Org >5.04
+          (org-latex-cleaned-string-for-export
+           region :for-html nil
+                  :comments nil
+                  :for-LaTeX t
+                  :skip-before-1st-heading nil
+                  :LaTeX-fragments nil)))
+    (set-buffer buffer)
+    (erase-buffer)
+    (unless body-only (insert preamble))
+    (when text (insert (org-export-latex-content text) "\n\n"))
+    (unless skip (insert first-lines))
+
+    ;; handle the case where the region does not begin with a section
+    (when region-p
+      (insert (with-temp-buffer
+                (insert string-for-export)
+                (org-export-latex-first-lines))))
+
+    (org-export-latex-global
+     (with-temp-buffer
+       (insert string-for-export)
+       (goto-char (point-min))
+       (re-search-forward "^\\(\\*+\\) " nil t)
+       (let* ((asters (length (match-string 1)))
+              (level (if odd (- asters 2) (- asters 1))))
+         (setq org-latex-add-level
+               (if odd (1- (/ (1+ asters) 2)) (1- asters)))
+         (org-export-latex-parse-global level odd))))
+
+    (unless body-only (insert "\n\\end{document}"))
+    (or to-buffer (write-file filename))
+    (goto-char (point-min))
+    (message "Exporting to LaTeX...done")
+    (if (eq to-buffer 'string)
+        (prog1 (buffer-substring (point-min) (point-max))
+          (kill-buffer (current-buffer)))
+      (current-buffer))))
+
+(defun org-export-latex-set-initial-vars (ext-plist)
+  "Store org local variables required for LaTeX export.
+EXT-PLIST is an optional additional plist."
+  (setq org-latex-todo-keywords-1 org-todo-keywords-1
+        org-latex-all-targets-regexp
+        (org-make-target-link-regexp (org-all-targets))
+        org-latex-options-plist
+        (org-combine-plists (org-default-export-plist) ext-plist
+                            (org-infile-export-plist))
+        org-latex-sectioning-depth
+        (let ((hl-levels (plist-get org-latex-options-plist :headline-levels))
+              (sec-depth (length org-export-latex-sectioning-alist)))
+              ;; Fall back on org-export-latex-sectioning-alist length if
+              ;; headline-levels goes beyond it
+          (if (> hl-levels sec-depth) sec-depth hl-levels))))
+
+(defun org-export-latex-make-preamble (opt-plist)
+  "Make the LaTeX preamble and return it as a string.
+Argument OPT-PLIST is the options plist for current buffer."
+  (let ((toc (plist-get opt-plist :table-of-contents)))
+    (format (concat org-export-latex-preamble
+     "
+%s
+
+\\begin{document}
+
+\\title{%s}
+%s
+%s
+\\maketitle
+%s
+%s
+")
+            (if 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") "")
+            (or (plist-get opt-plist :title)
+                (and (not
+                      (plist-get opt-plist :skip-before-1st-heading))
+                     (org-export-grab-title-from-buffer))
+                (and buffer-file-name
+                     (file-name-sans-extension
+                      (file-name-nondirectory buffer-file-name)))
+                "UNTITLED")
+            (if (plist-get opt-plist :author-info)
+                (format "\\author{%s}" 
+                        (or (plist-get opt-plist :author) user-full-name))
+              (format "%%\\author{%s}"
+                      (or (plist-get opt-plist :author) user-full-name)))
+            (if (plist-get opt-plist :timestamps)
+                (format "\\date{%s}"
+                        (format-time-string (or org-export-latex-date-format
+                                                (car org-time-stamp-formats))))
+              "%\\date{}")
+            (if (and (plist-get opt-plist :section-numbers) toc)
+                (format "\\setcounter{tocdepth}{%s}"
+                        (plist-get opt-plist :headline-levels)) "")
+            (if (and (plist-get opt-plist :section-numbers) toc)
+                "\\tableofcontents" ""))))
+
+(defun org-export-latex-first-lines (&optional comments)
+  "Export the first lines before first headline.
+COMMENTS is either nil to replace them with the empty string or a
+formatting string like %%%%s if we want to comment them out."
+  (save-excursion
+    (goto-char (point-min))
+    (let* ((end (if (re-search-forward "^\\*" nil t)
+                    (goto-char (match-beginning 0))
+                  (goto-char (point-max)))))
+      (org-export-latex-content
+       (org-latex-cleaned-string-for-export
+        (buffer-substring (point-min) end)
+        :for-html nil
+        :for-LaTeX t
+        :comments nil
+        :skip-before-1st-heading nil
+        :LaTeX-fragments nil)))))
+
+(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-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)))
+
+(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."
+  (mapc (lambda(x) (org-export-latex-subcontent x)) subcontent))
+
+(defun org-export-latex-subcontent (subcontent)
+  "Export each cell of SUBCONTENT to LaTeX."
+  (let ((heading (org-export-latex-fontify-headline
+                  (cdr (assoc 'heading subcontent))))
+        (level (- (cdr (assoc 'level subcontent))
+                  org-latex-add-level))
+        (occur (number-to-string (cdr (assoc 'occur subcontent))))
+        (content (cdr (assoc 'content subcontent)))
+        (subcontent (cadr (assoc 'subcontent subcontent)))
+        (num (plist-get org-latex-options-plist :section-numbers)))
+    (cond 
+     ;; Normal conversion
+     ((<= level org-latex-sectioning-depth)
+      (let ((sec (assoc level org-export-latex-sectioning-alist)))
+        (insert (format (if num (cadr sec) (caddr sec)) heading) "\n"))
+      (insert (org-export-latex-content content))
+      (cond ((stringp subcontent) (insert subcontent))
+            ((listp subcontent) (org-export-latex-sub subcontent))))
+     ;; At a level under the hl option: we can drop this subsection
+     ((> level org-latex-sectioning-depth)
+      (cond ((eq org-export-latex-low-levels 'description)
+             (insert (format "\\begin{description}\n\n\\item[%s]\n\n" heading))
+             (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")
+             (insert (org-export-latex-content content))
+             (cond ((stringp subcontent) (insert subcontent))
+                   ((listp subcontent) (org-export-latex-sub subcontent)))))))))
+
+(defun org-export-latex-special-keywords-maybe (remove-list)
+  "Maybe remove keywords depending on rules in REMOVE-LIST."
+  (goto-char (point-min))
+  (let ((re-todo (mapconcat 'identity org-latex-todo-keywords-1 "\\|")))
+    ;; 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 (plist-get remove-list :tags)
+          (replace-match "")
+        (replace-match (format "\\texttt{%s}" (match-string 0)) t t)))))
+
+(defun org-export-latex-fontify-headline (headline)
+  "Fontify special words in a HEADLINE."
+  (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" headline)
+    (goto-char (point-min))
+    (org-export-latex-fontify)
+    (org-export-latex-special-chars
+     (plist-get org-latex-options-plist :sub-superscript))
+    (org-export-latex-special-keywords-maybe
+     org-export-latex-remove-from-headines)
+    (org-export-latex-links)
+    (org-trim (buffer-substring-no-properties (point-min) (point-max)))))
+
+(defun org-export-latex-content (content)
+  "Convert CONTENT string to LaTeX."
+  (with-temp-buffer
+   (insert content)
+   (org-export-latex-quotation-marks)
+   (when (plist-get org-latex-options-plist :emphasize)
+     (org-export-latex-fontify))
+   (org-export-latex-special-chars
+    (plist-get org-latex-options-plist :sub-superscript))
+   (org-export-latex-links)
+   (org-export-latex-special-keywords)
+   (org-export-latex-itemize)
+   (org-export-latex-enumerate)
+   (org-export-latex-tables
+    (plist-get org-latex-options-plist :tables))
+   (org-export-latex-fixed-width
+    (plist-get org-latex-options-plist :fixed-width))
+   (org-export-fix-invisible-strings)
+   (buffer-substring (point-min) (point-max))))
+
+(defun org-export-fix-invisible-strings ()
+  "Comment out (INVISIBLE) warnings."
+  (goto-char (point-min))
+  (while (re-search-forward "(INVISIBLE)" nil t)
+    (replace-match "%\\&")))
+
+(defun org-export-latex-quotation-marks ()
+  "Export question marks depending on language conventions.
+Local definition of the language overrides
+`org-export-latex-quotation-marks-convention' which overrides
+`org-export-default-language'."
+  (let* ((lang (or (plist-get org-latex-options-plist :language)
+                    org-export-latex-quotation-marks-convention))
+         (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-latex-protect rpl)
+                (org-if-unprotected
+                 (replace-match rpl t t))))) quote-rpl)))
+
+;; | chars/string in Org   | normal environment    | math environment      |
+;; |-----------------------+-----------------------+-----------------------|
+;; | & # % $               | \& \# \% \$           | \& \# \% \$           |
+;; | { } _ ^ \             | \ { \ } \_ \^ \\      | {  }  _  ^ \          |
+;; |-----------------------+-----------------------+-----------------------|
+;; | a_b and a^b           | $a_b$ and $a^b$       | a_b and a^b           |
+;; | a_abc and a_{abc}     | $a_a$bc and $a_{abc}$ | a_abc and a_{abc}     |
+;; | \tau and \mu          | $\tau$ and $\mu$      | \tau and \mu          |
+;; |-----------------------+-----------------------+-----------------------|
+;; | \_ \^                 | \_  \^                | \_  \^                |
+;; | \(a=\mu\mbox{m}\)     | \(a=\mu\mbox{m}\)     | \(a=\mu\mbox{m}\)     |
+;; | \[\beta^2-a=0\]       | \[\beta^2-a=0\]       | \[\beta^2-a=0\]       |
+;; | $x=22\tau$            | $x=22\tau$            | $x=22\tau$            |
+;; | $$\alpha=\sqrt{a^3}$$ | $$\alpha=\sqrt{a^3}$$ | $$\alpha=\sqrt{a^3}$$ |
+
+(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 (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) "~")
+                    (unless (get-text-property 0 'org-protected (match-string 2))
+                      (if (equal (match-string 1) "\\") nil
+                        (replace-match 
+                         (org-latex-protect
+                          (concat (match-string 1) "\\textasciitilde{}")) 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 1)
+                                            (match-string 2)
+                                            (match-string 3))) "") t t)))))))
+        '("^\\([^\n$]*?\\|^\\)\\(\\\\?\\$\\)\\([^\n$]*\\)$"
+          "\\([a-za-z0-9]+\\|[ \t\n]\\|\\\\\\)\\(_\\|\\^\\)\\([a-za-z0-9]+\\|[ \t\n]\\|[:punct:]\\|{[a-za-z0-9]+}\\|([a-za-z0-9]+)\\)"
+          "\\(.\\|^\\)\\(\\\\\\)\\([ \t\n]\\|[a-za-z&#%{}]+\\)"
+          "\\(.\\|^\\)\\(&\\)"
+          "\\(.\\|^\\)\\(#\\)"
+          "\\(.\\|^\\)\\(%\\)"
+          "\\(.\\|^\\)\\({\\)"
+          "\\(.\\|^\\)\\(}\\)"
+          "\\(.\\|^\\)\\(~\\)")))
+
+(defun org-export-latex-treat-sub-super-char
+  (subsup string-before char 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 ((get-text-property 0 'org-protected 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 subsup 
+                     (> (length string-after) 1)
+                     (string-match "[({]?\\([^)}]+\\)[)}]?" string-after))
+                (format "$%s%s{%s}$" string-before char
+                        (match-string 1 string-after)))
+          (subsup (concat "$" string-before char string-after "$"))
+          (t (concat string-before char string-after))))
+        (t (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) "$"))
+        ((and (not (string-match "^[ \n\t]" string-after))
+              (not (string-match "[ \n\t]\\'" string-before)))
+         ;; backslash is inside a word
+         (concat string-before "$\\backslash$" 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)
+         (concat string-before "\\" string-after))
+        ((and (string-match "^[ \t\n]" string-after)
+              (string-match "[ \t\n]\\'" string-before))
+         ;; backslash is alone, convert it to $\backslash$
+         (concat string-before "$\\backslash$" string-after))
+        (t (concat string-before "$\\backslash$" string-after))))
+
+(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))))))
+
+(defun org-export-latex-tables (opt)
+  "When OPT is non-nil convert tables to LaTeX."
+  (goto-char (point-min))
+  (while (re-search-forward "^\\([ \t]*\\)|" nil t)
+    ;; Re-align the table to update org-table-last-alignment
+    (save-excursion (save-match-data (org-table-align)))
+    (let (tbl-list
+          (beg (match-beginning 0))
+          (end (save-excursion
+                 (re-search-forward
+                  (concat "^" (regexp-quote (match-string 1))
+                          "[^|]\\|\\'") nil t) (match-beginning 0))))
+      (beginning-of-line)
+      (while (not (eq end (point)))
+        (if (looking-at "[ \t]*|\\([^-|].+\\)|[ \t]*$")
+            (push (split-string (org-trim (match-string 1)) "|") tbl-list)
+          (push 'hline tbl-list))
+        (forward-line))
+      ;; comment region out instead of deleting it ?
+      (apply 'delete-region (list beg end))
+      (when opt (insert (orgtbl-to-latex (nreverse tbl-list) 
+                                         nil) "\n\n")))))
+
+(defun org-export-latex-special-keywords ()
+  "Convert special keywords to LaTeX.
+Regexps are those from `org-latex-special-string-regexps'."
+  (let ((rg org-latex-special-string-regexps) r)
+    (while (setq r (pop rg))
+      (goto-char (point-min))
+      (while (re-search-forward (eval r) nil t)
+        (replace-match (format "\\\\texttt{%s}" (match-string 0)) t)))))
+
+;; FIXME - we need better implementation for nested lists
+(defun org-export-latex-list (srch0 srch1 srch2 rpl0 rpl1)
+  "Convert lists to LaTeX."
+  (goto-char (point-min))
+  (while (re-search-forward srch0 nil t)
+    (let* ((beg (match-beginning 0))
+           (prefix (regexp-quote (match-string 1)))
+           (end-string (when (re-search-forward srch1 nil t)
+                         (match-string 0))))
+      (goto-char beg) (insert rpl0)
+      (while (re-search-forward
+              (concat "^" prefix srch2)
+              (if (not end-string)
+                  (point-max)
+                (save-match-data
+                  (save-excursion
+                    (re-search-forward
+                     (regexp-quote end-string) nil t)))) t)
+        (replace-match 
+         (concat "\\item " 
+                 (if (match-string 1) 
+                     (format "\\texttt{%s}" (match-string 1))))
+         t t))
+      (goto-char (if end-string
+                     (progn (re-search-forward
+                             (regexp-quote end-string) nil t)
+                            (match-beginning 0))
+                   (point-max)))
+      (skip-chars-backward "\n") (forward-line 2)
+      (insert rpl1))))
+
+(defun org-export-latex-itemize ()
+  "Convert item list to LaTeX."
+  (org-export-latex-list
+   "^\\([ \t]*\\)-"
+   "^[^ \n\t-]+.*$"
+   "- ?\\(\\[.+\\]\\)?"
+   "\\begin{itemize}\n"
+   "\\end{itemize}\n"))
+
+(defun org-export-latex-enumerate ()
+  "Convert numeric list to LaTeX."
+  (org-export-latex-list
+   "^\\([ \t]*\\)[0-9]+[\.)] \\(\\[.+\\]\\)? ?"
+   "^[^ \n\t0-9]+.*$"
+   "[0-9]+[\.)] ?\\(\\[.+\\]\\)?"
+   "\\begin{enumerate}\n"
+   "\\end{enumerate}\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*
+    (unless (get-text-property (1- (point)) 'org-protected)
+      (replace-match
+       (concat (match-string 1)
+               (format
+                (org-export-latex-protect-char-in-string
+                 '("\\" "{" "}")
+                 (cadr (assoc (match-string 3)
+                              org-export-latex-emphasis-alist)))
+                (match-string 4))
+               (match-string 5)) t t)
+      (backward-char))))
+
+(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-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-latex-all-targets-regexp)
+            (remove (list (match-beginning 0) (match-end 0)))
+            (type (match-string 2))
+            (raw-path (match-string 3))
+            (full-raw-path (concat (match-string 1) raw-path))
+            (desc (match-string 5))
+            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 "\\.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-latex-options-plist)
+                                       raw-path))))))))
+       ;; process with link inserting
+       (apply 'delete-region remove)
+       (cond ((and imgp (plist-get org-latex-options-plist :inline-images))
+              (insert (format "\\includegraphics[%s]{%s}"
+                              ;; image option should be set be a comment line
+                              org-export-latex-image-default-option
+                              (expand-file-name raw-path))))
+             ;; FIXME: what about caption? image properties?
+             (radiop (insert (format "\\hyperref[%s]{%s}" raw-path desc)))
+             (path (insert (format "\\href{%s}{%s}" path desc)))
+             (t (insert "\\texttt{" desc "}")))))))
+
+
+(defun org-latex-cleaned-string-for-export (string &rest parameters)
+  "Cleanup a buffer STRING so that links can be created safely."
+  (interactive)
+  (let* ((re-radio (and org-target-link-regexp
+                        (concat "\\([^<]\\)\\(" org-target-link-regexp "\\)")))
+         (re-plain-link (concat "\\([^[<]\\)" org-plain-link-re))
+         (re-angle-link (concat "\\([^[]\\)" org-angle-link-re))
+         (re-archive (concat ":" org-archive-tag ":"))
+         (re-quote (concat "^\\*+[ \t]+" org-quote-string "\\>"))
+         (htmlp (plist-get parameters :for-html))
+         (latexp (plist-get parameters :for-LaTeX))
+         (commentsp (plist-get parameters :comments))
+         (inhibit-read-only t)
+         (outline-regexp "\\*+ ")
+         a b xx
+         rtn p)
+    (save-excursion
+      (set-buffer (get-buffer-create " org-mode-tmp"))
+      (erase-buffer)
+      (insert string)
+      ;; Remove license-to-kill stuff
+      (while (setq p (text-property-any (point-min) (point-max)
+                                        :org-license-to-kill t))
+        (delete-region p (next-single-property-change p :org-license-to-kill)))
+
+      (let ((org-inhibit-startup t)) (org-mode))
+      (untabify (point-min) (point-max))
+
+      ;; Get the correct stuff before the first headline
+      (when (plist-get parameters :skip-before-1st-heading)
+        (goto-char (point-min))
+        (when (re-search-forward "^\\*+[ \t]" nil t)
+          (delete-region (point-min) (match-beginning 0))
+          (goto-char (point-min))
+          (insert "\n")))
+      (when (plist-get parameters :add-text)
+        (goto-char (point-min))
+        (insert (plist-get parameters :add-text) "\n"))
+
+      ;; Get rid of archived trees
+      (when (not (eq org-export-with-archived-trees t))
+        (goto-char (point-min))
+        (while (re-search-forward re-archive nil t)
+          (if (not (org-on-heading-p t))
+              (org-end-of-subtree t)
+            (beginning-of-line 1)
+            (setq a (if org-export-with-archived-trees
+                        (1+ (point-at-eol)) (point))
+                  b (org-end-of-subtree t))
+            (if (> b a) (delete-region a b)))))
+
+      ;; Get rid of property drawers
+      (unless org-export-with-property-drawer
+        (goto-char (point-min))
+        (while (re-search-forward "^[ \t]*:PROPERTIES:[ \t]*\n\\([^@]*?\n\\)?[ \t]*:END:[ \t]*\n" nil t)
+          (replace-match "")))
+
+      ;; Find targets in comments and move them out of comments,
+      ;; but mark them as targets that should be invisible
+      (goto-char (point-min))
+      (while (re-search-forward "^#.*?\\(<<<?[^>\r\n]+>>>?\\).*" nil t)
+        (replace-match "\\1(INVISIBLE)"))
+
+      ;; Specific LaTeX cleaning
+      (when latexp
+        (require 'org-export-latex nil t)
+        (org-export-latex-cleaned-string))
+
+      ;; Protect stuff from HTML processing
+      (goto-char (point-min))
+      (let ((formatters `((,htmlp "HTML" "BEGIN_HTML" "END_HTML"))) fmt)
+        (while (re-search-forward "^[ \t]*:.*\\(\n[ \t]*:.*\\)*" nil t)
+          (add-text-properties (match-beginning 0) (match-end 0)
+                               '(org-protected t)))
+        (while formatters
+          (setq fmt (pop formatters))
+          (when (car fmt)
+            (goto-char (point-min))
+            (while (re-search-forward (concat "^#\\+" (cadr fmt) 
+                                              ":[ \t]*\\(.*\\)") nil t)
+              (replace-match "\\1" t)
+              (add-text-properties
+               (point-at-bol) (min (1+ (point-at-eol)) (point-max))
+               '(org-protected t))))
+          (goto-char (point-min))
+          (while (re-search-forward
+                  (concat "^#\\+" 
+                          (caddr fmt) "\\>.*\\(\\(\n.*\\)*?\n\\)#\\+"
+                          (cadddr fmt) "\\>.*\n?") nil t)
+            (if (car fmt)
+                (add-text-properties (match-beginning 1) (1+ (match-end 1))
+                                     '(org-protected t))
+              (delete-region (match-beginning 0) (match-end 0))))
+          (goto-char (point-min))
+          (while (re-search-forward re-quote nil t)
+            (goto-char (match-beginning 0))
+            (end-of-line 1)
+            (add-text-properties (point) (org-end-of-subtree t)
+                                 '(org-protected t)))))
+
+      ;; Remove or replace comments
+      ;; If :comments is set, use this char for commenting out comments and
+      ;; protect them. otherwise delete them
+      (goto-char (point-min))
+      (while (re-search-forward "^#\\(.*\n?\\)" nil t)
+        (if commentsp
+            (progn (add-text-properties
+                    (match-beginning 0) (match-end 0) '(org-protected t))
+                   (replace-match (format commentsp (match-string 1)) t t))
+          (replace-match "")))
+
+      ;; Find matches for radio targets and turn them into internal links
+      (goto-char (point-min))
+      (when re-radio
+        (while (re-search-forward re-radio nil t)
+          (org-if-unprotected
+           (replace-match "\\1[[\\2]]"))))
+
+      ;; Find all links that contain a newline and put them into a single line
+      (goto-char (point-min))
+      (while (re-search-forward "\\(\\(\\[\\|\\]\\)\\[[^]]*?\\)[ \t]*\n[ \t]*\\([^]]*\\]\\(\\[\\|\\]\\)\\)" nil t)
+        (org-if-unprotected
+         (replace-match "\\1 \\3")
+         (goto-char (match-beginning 0))))
+
+      ;; Convert LaTeX fragments to images
+      (when (plist-get parameters :LaTeX-fragments)
+        (org-format-latex
+         (concat "ltxpng/" (file-name-sans-extension
+                            (file-name-nondirectory
+                             org-current-export-file)))
+         org-current-export-dir nil "Creating LaTeX image %s"))
+      (message "Exporting...")
+
+      ;; Normalize links: Convert angle and plain links into bracket links
+      ;; Expand link abbreviations
+      (goto-char (point-min))
+      (while (re-search-forward re-plain-link nil t)
+        (goto-char (1- (match-end 0)))
+        (org-if-unprotected
+         (let* ((s (concat (match-string 1) "[[" (match-string 2)
+                           ":" (match-string 3) "]]")))
+           ;; added 'org-protected property to links
+           (add-text-properties 0 (length s) '(org-protected t) s)
+           (replace-match s t t))))
+      (goto-char (point-min))
+      (while (re-search-forward re-angle-link nil t)
+        (goto-char (1- (match-end 0)))
+        (org-if-unprotected
+         (let* ((s (concat (match-string 1) "[[" (match-string 2)
+                           ":" (match-string 3) "]]")))
+           (add-text-properties 0 (length s) '(org-protected t) s)
+           (replace-match s t t))))
+      (goto-char (point-min))
+      (while (re-search-forward org-bracket-link-regexp nil t)
+        (org-if-unprotected
+         (let* ((s (concat "[[" (setq xx (save-match-data
+                                           (org-link-expand-abbrev (match-string 1))))
+                           "]"
+                           (if (match-end 3)
+                               (match-string 2)
+                             (concat "[" xx "]"))
+                           "]")))
+           (add-text-properties 0 (length s) '(org-protected t) s)
+           (replace-match s t t))))
+
+      ;; Find multiline emphasis and put them into single line
+      (when (plist-get  parameters :emph-multiline)
+        (goto-char (point-min))
+        (while (re-search-forward org-emph-re nil t)
+          (if (not (= (char-after (match-beginning 3))
+                      (char-after (match-beginning 4))))
+              (org-if-unprotected
+               (subst-char-in-region (match-beginning 0) (match-end 0)
+                                     ?\n ?\  t)
+               (goto-char (1- (match-end 0))))
+            (goto-char (1+ (match-beginning 0))))))
+
+      (setq rtn (buffer-string)))
+    (kill-buffer " org-mode-tmp")
+    rtn))
+
+(defsubst org-latex-protect (string)
+  (add-text-properties 0 (length string) '(org-protected t) string)
+  string)
+
+(defun org-export-latex-cleaned-string ()
+  "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)))
+
+  ;; convert LaTeX to @LaTeX{}
+  (goto-char (point-min))
+  (let ((case-fold-search nil) rpl)
+    (while (re-search-forward "\\([^+_]\\)LaTeX" nil t)
+    (replace-match (org-latex-protect 
+                    (concat (match-string 1) "\\LaTeX{}")) t t)))
+
+  ;; convert horizontal rules
+  (goto-char (point-min))
+  (while (re-search-forward "^----+.$" nil t)
+    (replace-match (org-latex-protect "\\hrule") t t))
+
+  ;; Remove COMMENT subtrees
+  ;; What about QUOTE subtrees?
+  (goto-char (point-min))
+  (while (re-search-forward 
+          (concat "^\\*+ \\(" org-comment-string "\\)") 
+          nil t)
+    (beginning-of-line)
+    (org-cut-subtree))
+  
+  ;; protect LaTeX \commands{...}
+  (goto-char (point-min))
+  (while (re-search-forward "\\\\[a-z]+{.+}" nil t)
+    (add-text-properties (match-beginning 0) (match-end 0)
+                         '(org-protected t)))
+  
+  ;; Replace radio links
+  (goto-char (point-min))
+  (let ((search (concat "<<<?" org-latex-all-targets-regexp ">?>>")))
+    (while (re-search-forward search nil t)
+      (replace-match 
+       (org-latex-protect (format "\\label{%s}" (match-string 1))) t t)))
+  
+  ;; delete @<br /> cookies
+  (goto-char (point-min))
+  (while (re-search-forward "@<[^<>\n]*>" nil t)
+    (replace-match ""))
+  
+  ;; add #+BEGIN_LaTeX before any \begin{...}
+  (goto-char (point-min))
+  (while (re-search-forward "^ *\\\\begin{" nil t)
+    (replace-match "#+BEGIN_LaTeX:\n\\&" t))
+  
+  ;; add #+END_LaTeX after any \end{...}
+  (goto-char (point-min))
+  (while (re-search-forward "^ *\\\\end{.+}.*$" nil t)
+    (replace-match "\\&\n#+END_LaTeX" t))
+  
+  ;; When converting to LaTeX, replace footnotes
+  ;; FIXME: don't protect footnotes from conversion
+  (when (plist-get org-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)
+          (when (and (re-search-forward (regexp-quote 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)) 
+                              ;; FIXME stupid workaround for cases where 
+                              ;; `org-bracket-link-analytic-regexp' matches
+                              ;; }. as part of the link.
+                              " "))
+              (delete-region (point) end)))
+          (goto-char foot-beg)
+          (delete-region foot-beg foot-end)
+          (setq footnote-rpl (format "\\footnote{%s}" footnote))
+          (add-text-properties 0 1 '(org-protected t) footnote-rpl)
+          (add-text-properties 9 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 "")))
+  
+  ;; Protect stuff from LaTeX processing. 
+  ;; We will get rid on this once org.el integrate org-export-latex.el
+  ;; FIXME: #+LaTeX should be aware of the preceeding indentation in lists
+  (goto-char (point-min))
+  (let ((formatters `((,latexp "LaTeX" "BEGIN_LaTeX" "END_LaTeX"))) fmt)
+    (while (re-search-forward "^[ \t]*:.*\\(\n[ \t]*:.*\\)*" nil t)
+      (add-text-properties (match-beginning 0) (match-end 0)
+                           '(org-protected t)))
+    (while formatters
+      (setq fmt (pop formatters))
+      (when (car fmt)
+        (goto-char (point-min))
+        (while (re-search-forward (concat "^#\\+" (cadr fmt) 
+                                          ":[ \t]*\\(.*\\)") nil t)
+          (replace-match "\\1" t)
+          (add-text-properties
+           (point-at-bol) (min (1+ (point-at-eol)) (point-max))
+           '(org-protected t))))
+      (goto-char (point-min))
+      (while (re-search-forward
+              (concat "^#\\+" 
+                      (caddr fmt) "\\>.*\\(\\(\n.*\\)*?\n\\)#\\+"
+                      (cadddr fmt) "\\>.*\n?") nil t)
+        (if (car fmt)
+            (add-text-properties (match-beginning 1) (1+ (match-end 1))
+                                 '(org-protected t))
+          (delete-region (match-beginning 0) (match-end 0))))
+      (goto-char (point-min))
+      (while (re-search-forward re-quote nil t)
+        (goto-char (match-beginning 0))
+        (end-of-line 1)
+        (add-text-properties (point) (org-end-of-subtree t)
+                             '(org-protected t))))))
+
+(provide 'org-export-latex)
+
+;;; org-export-latex.el ends here