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[O] org-html: subtree specific footnote references


From: Suhail Shergill
Subject: [O] org-html: subtree specific footnote references
Date: Sat, 07 Jul 2012 20:00:34 +0000
User-agent: Gnus/5.130006 (Ma Gnus v0.6) Emacs/23.4 (gnu/linux)

running org-export-as-html on a subtree is currently problematic if the result
is to be merged into a document which contains html-ized versions of other
subtrees: the footnote references and definitions get clobbered.

this patch uses the CUSTOM_ID property of the subtree to generate unique
footnote references and definitions. if the subtree does not have the CUSTOM_ID
property set the result is a nop.

>From 27f89f8bfff334810aba5c33af621e351fa0be79 Mon Sep 17 00:00:00 2001
From: Suhail Shergill <address@hidden>
Date: Sun, 8 Apr 2012 10:49:51 -0400
Subject: [PATCH] org-html.el: Make footnotes unique to an entry

* lisp/org-html.el (org-export-as-html): Assign unique ids to footnotes
  if possible

If the entry (or its ancestor) has the CUSTOM_ID property defined, then
use that as part of the generated footnote references and definitions.
---
 lisp/org-html.el |   12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/lisp/org-html.el b/lisp/org-html.el
index c9c9d78..8b79c39 100644
--- a/lisp/org-html.el
+++ b/lisp/org-html.el
@@ -1248,6 +1248,9 @@ PUB-DIR is set, use this as the publishing directory."
         (org-export-have-math nil)
         (org-export-footnotes-seen nil)
         (org-export-footnotes-data (org-footnote-all-labels 'with-defs))
+        (custom-id (or (org-entry-get nil "CUSTOM_ID" t) ""))
+        (footnote-def-prefix (format "fn-%s" custom-id))
+        (footnote-ref-prefix (format "fnr-%s" custom-id))
         (lines
          (org-split-string
           (org-export-preprocess-string
@@ -1685,8 +1688,8 @@ PUB-DIR is set, use this as the publishing directory."
                          (format
                           (concat "%s"
                                   (format org-export-html-footnote-format
-                                          (concat "<a class=\"footref\" 
name=\"fnr.%s%s\" href=\"#fn.%s\">%s</a>")))
-                          (or (match-string 1 org-line) "") n extra n n)
+                                          (concat "<a class=\"footref\" 
name=\"" footnote-ref-prefix ".%s%s\" href=\"#" footnote-def-prefix 
".%s\">%s</a>")))
+                          (or (match-string 1 line) "") n extra n n)
                          ;; If another footnote is following the
                          ;; current one, add a separator.
                          (if (save-match-data
@@ -1773,8 +1776,9 @@ PUB-DIR is set, use this as the publishing directory."
                              (format
                               (concat "<p class=\"footnote\">"
                                       (format org-export-html-footnote-format
-                                              "<a class=\"footnum\" 
name=\"fn.%s\" href=\"#fnr.%s\">%s</a>"))
-                              n n n) t t org-line)))))
+                                              (concat
+                                               "<a class=\"footnum\" name=\"" 
footnote-def-prefix ".%s\" href=\"#" footnote-ref-prefix ".%s\">%s</a>")))
+                              n n n) t t line)))))
            ;; Check if the line break needs to be conserved
            (cond
             ((string-match "\\\\\\\\[ \t]*$" org-line)
-- 
1.7.10

-- 
Suhail

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