LaTeX export: Avoid footnote processing in LATEX_HEADER lines

Nick Dokos writes:

> I define a LaTeX macro at the top of my document, like so:
>
> ,----
> | ...
> | #+LATEX_HEADER: \newcommand{\rowstyle}[1]{\gdef\currentrowstyle{#1}%
> | #+LATEX_HEADER:   #1\ignorespaces
> | #+LATEX_HEADER: }
> | ...
> `----
>
> and export - I get the following inserted:
>
> ,----
> | ...
> | \begin{document}
> |
> |
> |
> |
> |
> | \$\^{}{1}\$ FOOTNOTE DEFINITION NOT FOUND: 1
> | ...
> `----
>
> Obviously, the macro argument spec is mistaken for a footnote.

lisp/ChangeLog

@@ -1,3 +1,7 @@
+2009-08-21  Carsten Dominik  <carsten.dominik@gmail.com>
+
+	* org.el (org-in-commented-line): New function.
+
 2009-08-20  Carsten Dominik  <carsten.dominik@gmail.com>
 
 	* org.el (org-hide-block-toggle): Make folded blocks searchable.

lisp/org-footnote.el

@@ -363,42 +363,44 @@ referenced sequence."
       ;; Now find footnote references, and extract the definitions
       (goto-char (point-min))
       (while (re-search-forward org-footnote-re nil t)
-	(org-if-unprotected
-	 (setq def (match-string 4)
-	       idef def
-	       ref (or (match-string 1) (match-string 2))
-	       before (char-to-string (char-after (match-beginning 0))))
-	 (if (equal ref "fn:") (setq ref nil))
-	 (if (and ref (setq a (assoc ref ref-table)))
-	     (progn
-	       (setq marker (nth 1 a))
-	       (unless (nth 2 a) (setf (caddr a) def)))
-	   (setq marker (number-to-string (incf count))))
-	 (save-match-data
-	   (if def
-	       (setq def (org-trim def))
-	     (save-excursion
-	       (goto-char (point-min))
-	       (if (not (re-search-forward (concat "^\\[" (regexp-quote ref)
-						   "\\]") nil t))
-		   (setq def nil)
-		 (setq beg (match-beginning 0))
-		 (setq beg1 (match-end 0))
-		 (re-search-forward
-		  (org-re "^[ \t]*$\\|^\\*+ \\|^\\[\\([0-9]+\\|fn:[-_[:word:]]+\\)\\]")
-		  nil 'move)
-		 (setq def (buffer-substring beg1 (or (match-beginning 0)
-						      (point-max))))
-		 (goto-char beg)
-		 (skip-chars-backward " \t\n\t")
-		 (delete-region (1+ (point)) (match-beginning 0))))))
-	 (unless sort-only
-	   (replace-match (concat before "[" marker "]"))
-	   (and idef
-		org-footnote-fill-after-inline-note-extraction
-		(fill-paragraph)))
-	 (if (not a) (push (list ref marker def (if idef t nil)) ref-table))))
-
+	(unless (org-in-commented-line)
+	  (org-if-unprotected
+	   (setq def (match-string 4)
+		 idef def
+		 ref (or (match-string 1) (match-string 2))
+		 before (char-to-string (char-after (match-beginning 0))))
+	   (if (equal ref "fn:") (setq ref nil))
+	   (if (and ref (setq a (assoc ref ref-table)))
+	       (progn
+		 (setq marker (nth 1 a))
+		 (unless (nth 2 a) (setf (caddr a) def)))
+	     (setq marker (number-to-string (incf count))))
+	   (save-match-data
+	     (if def
+		 (setq def (org-trim def))
+	       (save-excursion
+		 (goto-char (point-min))
+		 (if (not (re-search-forward (concat "^\\[" (regexp-quote ref)
+						     "\\]") nil t))
+		     (setq def nil)
+		   (setq beg (match-beginning 0))
+		   (setq beg1 (match-end 0))
+		   (re-search-forward
+		    (org-re "^[ \t]*$\\|^\\*+ \\|^\\[\\([0-9]+\\|fn:[-_[:word:]]+\\)\\]")
+		    nil 'move)
+		   (setq def (buffer-substring beg1 (or (match-beginning 0)
+							(point-max))))
+		   (goto-char beg)
+		   (skip-chars-backward " \t\n\t")
+		   (delete-region (1+ (point)) (match-beginning 0))))))
+	   (unless sort-only
+	     (replace-match (concat before "[" marker "]"))
+	     (and idef
+		  org-footnote-fill-after-inline-note-extraction
+		  (fill-paragraph)))
+	   (if (not a) (push (list ref marker def (if idef t nil))
+			     ref-table)))))
+      
       ;; First find and remove the footnote section
       (goto-char (point-min))
       (cond

lisp/org.el

@@ -15547,6 +15547,10 @@ With prefix arg UNCOMPILED, load the uncompiled versions."
       (display-buffer buf)
       (sit-for 0))))
 
+(defun org-in-commented-line ()
+  "Is point in a line starting with `#'?"
+  (equal (char-after (point-at-bol)) ?#))
+
 (defun org-goto-marker-or-bmk (marker &optional bookmark)
   "Go to MARKER, widen if necessary.  When marker is not live, try BOOKMARK."
   (if (and marker (marker-buffer marker)