Bug: ox-odt.el should support text:start-value [9.1.14 (9.1.14-7-g01c419-elpaplus @ …/org-plus-contrib-20181015/)]

["Mark A. Hershberger" <mah@everybody.org>]

I saw that exporting plain lists with specified starting numbers
(‘[@20]') wasn't working—the lists just start over.

I was a bit frustrated with this, so I went looking at the code and the
ODF schema.  I found that ODF supports the text:start-value attribute[1]
that could be used where needed.

I came up with the following hack:

diff -ub ox-odt.el\~ ox-odt.el
--- ox-odt.el~	2018-10-17 16:47:32.859161792 -0400
+++ ox-odt.el	2018-10-17 21:04:46.391759435 -0400
@@ -1966,10 +1966,13 @@
 CONTENTS holds the contents of the item.  INFO is a plist holding
 contextual information."
   (let* ((plain-list (org-export-get-parent item))
+         (count (org-element-property :counter item))
 	 (type (org-element-property :type plain-list)))
     (unless (memq type '(ordered unordered descriptive-1 descriptive-2))
       (error "Unknown list type: %S" type))
-    (format "\n<text:list-item>\n%s\n%s"
+    (format (concat "\n<text:list-item"
+                    (when count (concat " text:start-value=\"" count "\""))
+                    ">\n%s\n%s")
 	    contents
 	    (if (org-element-map item 'table #'identity info 'first-match)
 		"</text:list-header>"

Diff finished.  Wed Oct 17 21:17:59 2018


Emacs  : GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.11, cairo version 1.14.8)
 of 2018-10-17
Package: Org mode version 9.1.14 (9.1.14-7-g01c419-elpaplus @ …/org-plus-contrib-20181015/)


Footnotes:
[1]  http://docs.oasis-open.org/office/v1.2/cs01/OpenDocument-v1.2-cs01-part1.html#a_19_868_3__text_list-item_