ascii export backend support to ox-bibtex w/pandoc
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Eric Schulte
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@ -23,11 +23,15 @@
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;;; Commentary:
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;;
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;; This is an utility to handle BibTeX export to both LaTeX and html
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;; exports. It uses the bibtex2html software from:
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;; This is an utility to handle BibTeX export to LaTeX, html and ascii
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;; exports. For HTML and ascii it uses the bibtex2html software from:
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;;
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;; http://www.lri.fr/~filliatr/bibtex2html/
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;;
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;; For ascii it uses the pandoc software from:
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;;
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;; http://johnmacfarlane.net/pandoc/
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;;
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;; It also introduces "cite" syntax for Org links.
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;;
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;; The usage is as follows:
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@ -71,6 +75,12 @@
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;; 2) creates a foo.html and foo_bib.html,
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;; 3) includes the contents of foo.html in the exported HTML file.
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;;
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;; For ascii export it:
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;; 1) converts all \cite{foo} and [[cite:foo]] to links to the
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;; bibliography,
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;; 2) creates a foo.txt and foo_bib.html,
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;; 3) includes the contents of foo.txt in the exported ascii file.
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;;
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;; For LaTeX export it:
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;; 1) converts all [[cite:foo]] to \cite{foo}.
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@ -144,7 +154,8 @@ to `org-bibtex-citation-p' predicate."
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(defun org-bibtex-process-bib-files (tree backend info)
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"Send each bibliography in parse tree to \"bibtex2html\" process.
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Return new parse tree."
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(when (org-export-derived-backend-p backend 'html)
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(when (or (org-export-derived-backend-p backend 'html)
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(org-export-derived-backend-p backend 'ascii))
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;; Initialize dynamically scoped variables. The first one
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;; contain an alist between keyword objects and their HTML
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;; translation. The second one will contain an alist between
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@ -183,21 +194,45 @@ Return new parse tree."
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(list (concat file ".bib")))))
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(error "Executing bibtex2html failed"))
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(and temp-file (delete-file temp-file))
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;; Open produced HTML file, wrap references within a block and
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;; return it.
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;; Open produced HTML file, and collect Bibtex key names
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(with-temp-buffer
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(insert "<div id=\"bibliography\">\n<h2>References</h2>\n")
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(insert-file-contents (concat file ".html"))
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(insert "\n</div>")
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;; Update `org-bibtex-html-keywords-alist'.
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(push (cons keyword (buffer-string))
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org-bibtex-html-keywords-alist)
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;; Update `org-bibtex-html-entries-alist'.
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(goto-char (point-min))
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(while (re-search-forward
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"a name=\"\\([-_a-zA-Z0-9:]+\\)\">\\(\\w+\\)" nil t)
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(push (cons (match-string 1) (match-string 2))
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org-bibtex-html-entries-alist))))))))
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org-bibtex-html-entries-alist)))
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;; Open produced HTML file, wrap references within a block and
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;; return it.
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(with-temp-buffer
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(cond
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((org-export-derived-backend-p backend 'html)
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(insert "<div id=\"bibliography\">\n<h2>References</h2>\n")
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(insert-file-contents (concat file ".html"))
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(insert "\n</div>"))
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((org-export-derived-backend-p backend 'ascii)
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;; convert HTML references to text w/pandoc
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(unless (eq 0 (call-process "pandoc" nil nil nil
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(concat file ".html")
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"-o"
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(concat file ".txt")))
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(error "Executing pandoc failed"))
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(insert "References\n==========\n\n")
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(insert-file-contents (concat file ".txt"))
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(goto-char (point-min))
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(while (re-search-forward
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"\\[ \\[bib\\][^ ]+ \\(\\]\\||[\n\r]\\)" nil t)
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(replace-match ""))
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(goto-char (point-min))
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(while (re-search-forward "\\( \\]\\| \\]\\| |\\)" nil t)
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(replace-match ""))
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(goto-char (point-min))
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(while (re-search-forward "[\n\r]\\([\n\r][\n\r]\\)" nil t)
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(replace-match "\\1"))))
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;; Update `org-bibtex-html-keywords-alist'.
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(push (cons keyword (buffer-string))
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org-bibtex-html-keywords-alist)))))))
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;; Return parse tree unchanged.
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tree)
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@ -205,7 +240,7 @@ Return new parse tree."
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"Merge all contiguous citation in parse tree.
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As a side effect, this filter will also turn all \"cite\" links
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into \"\\cite{...}\" LaTeX fragments."
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(when (org-export-derived-backend-p backend 'html 'latex)
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(when (org-export-derived-backend-p backend 'html 'latex 'ascii)
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(org-element-map tree '(link latex-fragment)
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(lambda (object)
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(when (org-bibtex-citation-p object)
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@ -303,6 +338,33 @@ Fallback to `html' back-end for other keywords."
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(ad-activate 'org-html-keyword)
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(ad-activate 'org-html-latex-fragment)
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;;; Ascii Part
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(defadvice org-ascii-keyword (around bibtex-keyword)
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"Translate \"BIBLIOGRAPHY\" keywords into ascii syntax.
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Fallback to `ascii' back-end for other keywords."
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(let ((keyword (ad-get-arg 0)))
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(if (not (equal (org-element-property :key keyword) "BIBLIOGRAPHY"))
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ad-do-it
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(setq ad-return-value
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(cdr (assq keyword org-bibtex-html-keywords-alist))))))
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(defadvice org-ascii-latex-fragment (around bibtex-citation)
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"Translate \"\\cite\" LaTeX fragments into ascii syntax.
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Fallback to `ascii' back-end for other keywords."
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(let ((fragment (ad-get-arg 0)))
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(if (not (org-bibtex-citation-p fragment)) ad-do-it
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(setq ad-return-value
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(format "[%s]"
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(mapconcat
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(lambda (key)
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(or (cdr (assoc key org-bibtex-html-entries-alist))
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key))
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(org-split-string
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(org-bibtex-get-citation-key fragment) ",") ","))))))
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(ad-activate 'org-ascii-keyword)
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(ad-activate 'org-ascii-latex-fragment)
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(provide 'ox-bibtex)
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