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| | ;;; org-bibtex-extras --- extras for working with org-bibtex entries
;; Copyright (C) 2008-2013 Free Software Foundation, Inc.
;; Author: Eric Schulte <eric dot schulte at gmx dot com>
;; Keywords: outlines, hypermedia, bibtex, d3
;; Homepage: http://orgmode.org
;; Version: 0.01
;; This file is not yet part of GNU Emacs.
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Warning: This should certainly be considered EXPERIMENTAL and still
;; in development, feedback is welcome, but don't expect it
;; to work.
;; This file add some extra functionality to your bibtex entries which
;; are stored as Org-mode headlines using org-bibtex.el. Most
;; features expect that you keep all of your reading notes in a single
;; file, set the `obe-bibtex-file' variable to the path to this file.
;;
;; - d3 view :: d3 is a Javascript library which supports interactive
;; display of graphs. To view your citations as a d3
;; graph, execute the following which will create a .json
;; export of your references file, then grab a copy of
;; d3, edit examples/force/force.js to replace
;;
;; var source`"miserables.json";
;;
;; with
;;
;; var source`"your-references.json";
;;
;; then view examples/force/force.html in your browser.
;;
;; - HTML export :: Customize the `obe-html-link-base' variable so
;; that it points to an html export of your
;; references, then add the following to your html
;; export hook, and citations will be resolved during
;; html export.
;;
;; (add-hook 'org-export-first-hook
;; (lambda ()
;; (when (equal org-export-current-backend 'html)
;; (obe-html-export-citations))))
;;; Code:
(require 'org-bibtex)
(defcustom obe-bibtex-file nil "File holding bibtex entries.")
(defcustom obe-html-link-base nil
"Base of citation links.
For example, to point to your `obe-bibtex-file' use the following.
(setq obe-html-link-base (format \"file:%s\" obe-bibtex-file))
")
(defvar obe-citations nil)
(defun obe-citations ()
"Return all citations from `obe-bibtex-file'."
(or obe-citations
(save-window-excursion
(find-file obe-bibtex-file)
(goto-char (point-min))
(while (re-search-forward " :CUSTOM_ID: \\(.+\\)$" nil t)
(push (org-babel-clean-text-properties (match-string 1))
obe-citations))
obe-citations)))
(defun obe-goto-citation (&optional citation)
"Visit a citation given its ID."
(interactive)
(let ((citation (or citation
(org-icompleting-read "Citation: "
(obe-citations)))))
(find-file obe-bibtex-file)
(goto-char (point-min))
(when (re-search-forward (format " :CUSTOM_ID: %s" citation) nil t)
(outline-previous-visible-heading 1)
t)))
(defun obe-html-export-citations ()
"Convert all \\cite{...} citations in the current file into HTML links."
(save-excursion
(goto-char (point-min))
(while (re-search-forward "\\\\cite{\\([^\000}]+\\)}" nil t)
(replace-match
(save-match-data
(mapconcat (lambda (c) (format "[[%s#%s][%s]]" obe-html-link-base c c))
(mapcar #'org-babel-trim
(split-string (match-string 1) ",")) ", "))))))
(defun obe-get-meta-data (citation)
"Collect meta-data for CITATION."
(save-excursion
(when (obe-goto-citation citation)
(let ((pt (point)))
`((:authors . ,(split-string (org-entry-get pt "AUTHOR") " and " t))
(:title . ,(org-babel-clean-text-properties (org-get-heading 1 1)))
(:journal . ,(org-entry-get pt "JOURNAL")))))))
(defun obe-meta-to-json (meta &optional fields)
"Turn a list of META data from citations into a string of json."
(let ((counter 1) nodes links)
(flet ((id (it) (position it nodes :test #'string= :key #'car))
(col (k) (mapcar (lambda (r) (cdr (assoc k r))) meta))
(add (lst)
(dolist (el lst) (push (cons el counter) nodes))
(incf counter)))
;; build the nodes of the graph
(add (col :title))
(add (remove-if (lambda (author) (string-match "others" author))
(remove-duplicates (apply #'append (col :authors))
:test #'string=)))
(dolist (field fields)
(add (remove-duplicates (col field) :test #'string=)))
;; build the links in the graph
(dolist (citation meta)
(let ((dest (id (cdr (assoc :title citation)))))
(dolist (author (mapcar #'id (cdr (assoc :authors citation))))
(when author (push (cons author dest) links)))
(let ((jid (id (cdr (assoc :journal citation)))))
(when jid (push (cons jid dest) links)))
(let ((cid (id (cdr (assoc :category citation)))))
(when cid (push (cons cid dest) links)))))
;; build the json string
(format "{\"nodes\":[%s],\"links\":[%s]}"
(mapconcat
(lambda (pair)
(format "{\"name\":%S,\"group\":%d}"
(car pair) (cdr pair)))
nodes ",")
(mapconcat
(lambda (link)
(format "{\"source\":%d,\"target\":%d,\"value\":1}"
(car link) (cdr link)))
(meta-to-links meta nodes) ",")))))
(provide 'org-bibtex-extras)
;;; org-bibtex-extras ends here
|