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Handle duplicate anchors.

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Aaron Muir Hamilton 2018-12-12 23:42:41 +00:00
parent f220a8883e
commit c0d1a8d40a
1 changed files with 24 additions and 4 deletions
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28
ox-gfm.el
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@ -273,14 +273,33 @@ contextual information."
;;;; Table of contents
(defun org-gfm-format-toc (headline)
(defun org-gfm-anchor-from-title (title)
(replace-regexp-in-string "[^a-z\-]" "" (downcase (replace-regexp-in-string "[ ]" "-" title))))
(defun org-gfm-anchor-from-headline (headline)
(org-gfm-anchor-from-title (org-export-data (org-export-get-alt-title headline info) info)))
(defun org-gfm-put-headline-dup (acc headline anchor counter)
(if (assoc (concat anchor "-" (number-to-string counter)) acc)
(org-gfm-put-headline-dup acc headline anchor (1+ counter))
(cons (cons (concat anchor "-" (number-to-string counter)) headline) acc)))
(defun org-gfm-put-headline (acc headline)
(let* ((anchor (org-gfm-anchor-from-headline headline)))
(if (assoc anchor acc)
(org-gfm-put-headline-dup acc headline anchor 1)
(cons (cons anchor headline) acc))))
(defun org-gfm-format-toc (anchor-and-headline)
"Return an appropriate table of contents entry for HEADLINE. INFO is a
plist used as a communication channel."
(let* ((title (org-export-data
(let* ((headline (cdr anchor-and-headline))
(title (org-export-data
(org-export-get-alt-title headline info) info))
(level (1- (org-element-property :level headline)))
(indent (concat (make-string (* level 2) ? )))
(anchor (replace-regexp-in-string "[^a-z\-]" "" (downcase (replace-regexp-in-string "[ ]" "-" title)))))
(anchor (car anchor-and-headline)))
(concat indent "- [" title "]" "(#" anchor ")")))
@ -324,7 +343,8 @@ CONTENTS is the transcoded contents string. INFO is a plist
holding export options."
(let* ((depth (plist-get info :with-toc))
(headlines (and depth (org-export-collect-headlines info depth)))
(toc-string (or (mapconcat 'org-gfm-format-toc headlines "\n") ""))
(anchors-to-headlines (reverse (seq-reduce 'org-gfm-put-headline headlines '())))
(toc-string (or (mapconcat 'org-gfm-format-toc anchors-to-headlines "\n") ""))
(toc-tail (if headlines "\n\n" "")))
(org-trim (concat toc-string toc-tail contents "\n" (org-gfm-footnote-section info)))))