Docbook export: Improve timestamp handling

lisp/ChangeLog

@@ -1,3 +1,9 @@
+2009-04-18  Carsten Dominik  <carsten.dominik@gmail.com>
+
+	* org-docbook.el (org-export-docbook-keywords-markup)
+	(org-export-docbook-timestamp-markup): New options.
+	(org-export-docbook-protect-tags): New function.
+
 2009-04-17  Carsten Dominik  <carsten.dominik@gmail.com>
 
 	* org-id.el (org-id-get-with-outline-path-completion): Turn off

lisp/org-docbook.el

@@ -233,6 +233,16 @@ the variable to
   :group 'org-export-docbook
   :type 'string)
 
+(defcustom org-export-docbook-keywords-markup "<literal>%s</literal>"
+  "A printf format string to be applied to keywords by DocBook exporter."
+  :group 'org-export-docbook
+  :type 'string)
+
+(defcustom org-export-docbook-timestamp-markup "<emphasis>%s</emphasis>"
+  "A printf format string to be applied to time stamps by DocBook exporter."
+  :group 'org-export-docbook
+  :type 'string)
+
 ;;; Autoload functions:
 
 ;;;###autoload
@@ -728,9 +738,13 @@ publishing directory."
 				  (org-solidify-link-text (match-string 1 line)))
 			  t t line)))))
 
-	  ;; Replace "&" by "&amp;", "<" and ">" by "&lt;" and "&gt;"
-	  ;; handle @<..> HTML tags (replace "@&gt;..&lt;" by "<..>")
-	  ;; Also handle sub_superscripts and checkboxes
+	  ;; Put time stamps and related keywords into special mark-up
+	  ;; elements.
+	  (setq line (org-export-docbook-handle-time-stamps line))
+
+	  ;; Replace "&", "<" and ">" by "&amp;", "&lt;" and "&gt;".
+	  ;; Handle @<..> HTML tags (replace "@&gt;..&lt;" by "<..>").
+	  ;; Also handle sub_superscripts and check boxes.
 	  (or (string-match org-table-hline-regexp line)
 	      (setq line (org-docbook-expand line)))
 
@@ -1321,6 +1335,38 @@ TABLE is a string containing the HTML code generated by
       (setq string (replace-match (match-string 1 string) t t string)))
     string))
 
+(defun org-export-docbook-protect-tags (string)
+  "Change ``<...>'' in string STRING into ``@<...>''.
+This is normally needed when STRING contains DocBook elements
+that need to be preserved in later phase of DocBook exporting."
+  (let ((start 0))
+    (while (string-match "<\\([^>]*\\)>" string start)
+      (setq string (replace-match
+		    "@<\\1>" t nil string)
+	    start (match-end 0)))
+    string))
+
+(defun org-export-docbook-handle-time-stamps (line)
+  "Format time stamps in string LINE."
+  (let (replaced
+	(kw-markup (org-export-docbook-protect-tags
+		    org-export-docbook-keywords-markup))
+	(ts-markup (org-export-docbook-protect-tags
+		    org-export-docbook-timestamp-markup)))
+    (while (string-match org-maybe-keyword-time-regexp line)
+      (setq replaced
+	    (concat replaced
+		    (substring line 0 (match-beginning 0))
+		    (if (match-end 1)
+			(format kw-markup
+				(match-string 1 line)))
+		    " "
+		    (format ts-markup
+			    (substring (org-translate-time
+					(match-string 3 line)) 1 -1)))
+	    line (substring line (match-end 0))))
+    (concat replaced line)))
+
 (provide 'org-docbook)
 
 ;;; org-docbook.el ends here