HTML export: Add class to outline containers using property

The HTML_CONTAINER_CLASS property can now be used to add a property to
the outline container of a node.

lisp/ChangeLog

@@ -1,6 +1,16 @@
 2010-02-01  Carsten Dominik  <carsten.dominik@gmail.com>
 
+	* org-html.el (org-html-level-start): Use the
+	`html-container-class' text property to set an additional class
+	for an outline container.
+
+	* org-exp.el (org-export-remember-html-container-classes): New
+	function.
+	(org-export-preprocess-string): Call
+	`org-export-remember-html-container-classes'.
+
 	* org.el (org-cycle): Mention level cycling in the docstring.
+	(org-default-properties): Add new property HTML_CONTAINER_CLASS.
 
 	* org-remember.el (org-remember-apply-template): Do file insertion
 	first.

lisp/org-exp.el

@@ -1362,6 +1362,9 @@ on this string to produce the exported version."
       ;; Find all headings and compute the targets for them
       (setq target-alist (org-export-define-heading-targets target-alist))
 
+      ;; Find HTML special classes for headlines
+      (org-export-remember-html-container-classes)
+
       ;; Get rid of drawers
       (org-export-remove-or-extract-drawers
        drawers (plist-get parameters :drawers) backend)
@@ -1590,6 +1593,17 @@ the current file."
 	 (unless desc (insert "][" link))
 	 (add-text-properties pos (point) props))))))
 
+(defun org-export-remember-html-container-classes ()
+  "Store the HTML_CONTAINER_CLASS properties in a text property."
+  (goto-char (point-min))
+  (let (class)
+    (while (re-search-forward
+	    "^[ \t]*:HTML_CONTAINER_CLASS:[ \t]+\\(\\S-+\\)" nil t)
+      (setq class (match-string 1))
+      (save-excursion
+	(org-back-to-heading t)
+	(put-text-property (point-at-bol) (point-at-eol) 'html-container-class class)))))
+
 (defvar org-export-format-drawer-function nil
   "Function to be called to format the contents of a drawer.
 The function must accept three parameters:

lisp/org-html.el

@@ -2003,6 +2003,7 @@ When TITLE is nil, just close all open levels."
   (org-close-par-maybe)
   (let* ((target (and title (org-get-text-property-any 0 'target title)))
 	 (extra-targets (assoc target org-export-target-aliases))
+	 (extra-class (and title (org-get-text-property-any 0 'html-container-class title)))
 	 (preferred (cdr (assoc target org-export-preferred-target-alist)))
 	 (remove (or preferred target))
 	 (l org-level-max)
@@ -2066,8 +2067,9 @@ When TITLE is nil, just close all open levels."
 	(setq href (cdr (assoc (concat "sec-" snumber) org-export-preferred-target-alist)))
 	(setq suffix (or href snumber))
 	(setq href (or href (concat "sec-" snumber)))
-	(insert (format "\n<div id=\"outline-container-%s\" class=\"outline-%d\">\n<h%d id=\"%s\">%s%s</h%d>\n<div class=\"outline-text-%d\" id=\"text-%s\">\n"
-			suffix level level href
+	(insert (format "\n<div id=\"outline-container-%s\" class=\"outline-%d%s\">\n<h%d id=\"%s\">%s%s</h%d>\n<div class=\"outline-text-%d\" id=\"text-%s\">\n"
+			suffix level (if extra-class (concat " " extra-class) "")
+			level href
 			extra-targets
 			title level level suffix))
 	(org-open-par)))))

lisp/org.el

@@ -12383,7 +12383,7 @@ but in some other way.")
     "TABLE_EXPORT_FORMAT" "TABLE_EXPORT_FILE"
     "EXPORT_FILE_NAME" "EXPORT_TITLE" "EXPORT_AUTHOR" "EXPORT_DATE"
     "ORDERED" "NOBLOCKING" "COOKIE_DATA" "LOG_INTO_DRAWER"
-    "CLOCK_MODELINE_TOTAL" "STYLE")
+    "CLOCK_MODELINE_TOTAL" "STYLE" "HTML_CONTAINER_CLASS")
   "Some properties that are used by Org-mode for various purposes.
 Being in this list makes sure that they are offered for completion.")