contrib/lisp/org-bibtex-extras.el

   1 ;;; org-bibtex-extras --- extras for working with org-bibtex entries
   2
   3 ;; Copyright (C) 2008-2012 Free Software Foundation, Inc.
   4
   5 ;; Author: Eric Schulte <eric dot schulte at gmx dot com>
   6 ;; Keywords: outlines, hypermedia, bibtex, d3
   7 ;; Homepage: http://orgmode.org
   8 ;; Version: 0.01
   9
  10 ;; This file is not yet part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation; either version 3, or (at your option)
  15 ;; any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;; Warning: This should certainly be considered EXPERIMENTAL and still
  28 ;;          in development, feedback is welcome, but don't expect it
  29 ;;          to work.
  30
  31 ;; This file add some extra functionality to your bibtex entries which
  32 ;; are stored as Org-mode headlines using org-bibtex.el.  Most
  33 ;; features expect that you keep all of your reading notes in a single
  34 ;; file, set the `obe-bibtex-file' variable to the path to this file.
  35 ;;
  36 ;; - d3 view :: d3 is a Javascript library which supports interactive
  37 ;;              display of graphs.  To view your citations as a d3
  38 ;;              graph, execute the following which will create a .json
  39 ;;              export of your references file, then grab a copy of
  40 ;;              d3, edit examples/force/force.js to replace
  41 ;;
  42 ;;                var source`"miserables.json";
  43 ;;
  44 ;;              with
  45 ;;
  46 ;;                var source`"your-references.json";
  47 ;;
  48 ;;              then view examples/force/force.html in your browser.
  49 ;;
  50 ;; - HTML export :: Customize the `obe-html-link-base' variable so
  51 ;;                  that it points to an html export of your
  52 ;;                  references, then add the following to your html
  53 ;;                  export hook, and citations will be resolved during
  54 ;;                  html export.
  55 ;;
  56 ;;       (add-hook 'org-export-first-hook
  57 ;;                (lambda ()
  58 ;;                  (when (equal org-export-current-backend 'html)
  59 ;;                    (obe-html-export-citations))))
  60
  61 ;;; Code:
  62 (require 'org-bibtex)
  63
  64 (defcustom obe-bibtex-file nil "File holding bibtex entries.")
  65
  66 (defcustom obe-html-link-base nil
  67   "Base of citation links.
  68 For example, to point to your `obe-bibtex-file' use the following.
  69
  70   (setq obe-html-link-base (format \"file:%s\" obe-bibtex-file))
  71 ")
  72
  73 (defvar obe-citations nil)
  74 (defun obe-citations ()
  75   "Return all citations from `obe-bibtex-file'."
  76   (or obe-citations
  77       (save-window-excursion
  78         (find-file obe-bibtex-file)
  79         (goto-char (point-min))
  80         (while (re-search-forward "  :CUSTOM_ID: \\(.+\\)$" nil t)
  81           (push (org-babel-clean-text-properties (match-string 1))
  82                 obe-citations))
  83         obe-citations)))
  84
  85 (defun obe-goto-citation (&optional citation)
  86   "Visit a citation given its ID."
  87   (interactive)
  88   (let ((citation (or citation
  89                       (org-icompleting-read "Citation: "
  90                                             (obe-citations)))))
  91     (find-file obe-bibtex-file)
  92     (goto-char (point-min))
  93     (when (re-search-forward (format "  :CUSTOM_ID: %s" citation) nil t)
  94       (outline-previous-visible-heading 1)
  95       t)))
  96
  97 (defun obe-html-export-citations ()
  98   "Convert all \\cite{...} citations in the current file into HTML links."
  99   (save-excursion
 100     (goto-char (point-min))
 101     (while (re-search-forward "\\\\cite{\\([^\000}]+\\)}" nil t)
 102       (replace-match
 103        (save-match-data
 104          (mapconcat (lambda (c) (format "[[%s#%s][%s]]" obe-html-link-base c c))
 105                     (mapcar #'org-babel-trim
 106                             (split-string (match-string 1) ",")) ", "))))))
 107
 108 (defun obe-get-meta-data (citation)
 109   "Collect meta-data for CITATION."
 110   (save-excursion
 111     (when (obe-goto-citation citation)
 112       (let ((pt (point)))
 113         `((:authors . ,(split-string (org-entry-get pt "AUTHOR") " and " t))
 114           (:title   . ,(org-babel-clean-text-properties (org-get-heading 1 1)))
 115           (:journal . ,(org-entry-get pt "JOURNAL")))))))
 116
 117 (defun obe-meta-to-json (meta &optional fields)
 118   "Turn a list of META data from citations into a string of json."
 119   (let ((counter 1) nodes links)
 120     (flet ((id (it) (position it nodes :test #'string= :key #'car))
 121            (col (k) (mapcar (lambda (r) (cdr (assoc k r))) meta))
 122            (add (lst)
 123                 (dolist (el lst) (push (cons el counter) nodes))
 124                 (incf counter)))
 125       ;; build the nodes of the graph
 126       (add (col :title))
 127       (add (remove-if (lambda (author) (string-match "others" author))
 128                       (remove-duplicates (apply #'append (col :authors))
 129                                          :test #'string=)))
 130       (dolist (field fields)
 131         (add (remove-duplicates (col field) :test #'string=)))
 132       ;; build the links in the graph
 133       (dolist (citation meta)
 134         (let ((dest (id (cdr (assoc :title citation)))))
 135           (dolist (author (mapcar #'id (cdr (assoc :authors citation))))
 136             (when author (push (cons author dest) links)))
 137           (let ((jid (id (cdr (assoc :journal citation)))))
 138             (when jid (push (cons jid dest) links)))
 139           (let ((cid (id (cdr (assoc :category citation)))))
 140             (when cid (push (cons cid dest) links)))))
 141       ;; build the json string
 142       (format "{\"nodes\":[%s],\"links\":[%s]}"
 143               (mapconcat
 144                (lambda (pair)
 145                  (format "{\"name\":%S,\"group\":%d}"
 146                          (car pair) (cdr pair)))
 147                nodes ",")
 148               (mapconcat
 149                (lambda (link)
 150                  (format "{\"source\":%d,\"target\":%d,\"value\":1}"
 151                          (car link) (cdr link)))
 152                (meta-to-links meta nodes) ",")))))
 153
 154 (provide 'org-bibtex-extras)
 155 ;;; org-bibtex-extras ends here