contrib/lisp/org-bibtex-extras.el

   1 ;;; org-bibtex-extras --- extras for working with org-bibtex entries
   2
   3 ;; Copyright (C) 2008-2018 Free Software Foundation, Inc.
   4
   5 ;; Author: Eric Schulte <eric dot schulte at gmx dot com>
   6 ;; Keywords: outlines, hypermedia, bibtex, d3
   7 ;; Homepage: https://orgmode.org
   8 ;; Version: 0.01
   9
  10 ;; This file is not yet part of GNU Emacs.
  11
  12 ;; This program 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 ;; This program 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 'ol-bibtex)
  63
  64 (declare-function org-trim "org" (s &optional keep-lead))
  65
  66 (defcustom obe-bibtex-file nil "File holding bibtex entries.")
  67
  68 (defcustom obe-html-link-base nil
  69   "Base of citation links.
  70 For example, to point to your `obe-bibtex-file' use the following.
  71
  72   (setq obe-html-link-base (format \"file:%s\" obe-bibtex-file))
  73 ")
  74
  75 (defvar obe-citations nil)
  76 (defun obe-citations ()
  77   "Return all citations from `obe-bibtex-file'."
  78   (or obe-citations
  79       (save-window-excursion
  80         (find-file (or obe-bibtex-file
  81                        (error "`obe-bibtex-file' has not been configured")))
  82         (goto-char (point-min))
  83         (while (re-search-forward "  :CUSTOM_ID: \\(.+\\)$" nil t)
  84           (push (org-no-properties (match-string 1))
  85                 obe-citations))
  86         obe-citations)))
  87
  88 (defun obe-html-export-citations ()
  89   "Convert all \\cite{...} citations in the current file into HTML links."
  90   (save-excursion
  91     (goto-char (point-min))
  92     (while (re-search-forward "\\\\cite{\\([^\000}]+\\)}" nil t)
  93       (replace-match
  94        (save-match-data
  95          (mapconcat (lambda (c) (format "[[%s#%s][%s]]" obe-html-link-base c c))
  96                     (mapcar #'org-trim
  97                             (split-string (match-string 1) ",")) ", "))))))
  98
  99 (defun obe-meta-to-json (meta &optional fields)
 100   "Turn a list of META data from citations into a string of json."
 101   (let ((counter 1) nodes links)
 102     (flet ((id (it) (position it nodes :test #'string= :key #'car))
 103            (col (k) (mapcar (lambda (r) (cdr (assoc k r))) meta))
 104            (add (lst)
 105                 (dolist (el lst) (push (cons el counter) nodes))
 106                 (incf counter)))
 107       ;; build the nodes of the graph
 108       (add (col :title))
 109       (add (remove-if (lambda (author) (string-match "others" author))
 110                       (remove-duplicates (apply #'append (col :authors))
 111                                          :test #'string=)))
 112       (dolist (field fields)
 113         (add (remove-duplicates (col field) :test #'string=)))
 114       ;; build the links in the graph
 115       (dolist (citation meta)
 116         (let ((dest (id (cdr (assq :title citation)))))
 117           (dolist (author (mapcar #'id (cdr (assq :authors citation))))
 118             (when author (push (cons author dest) links)))
 119           (let ((jid (id (cdr (assq :journal citation)))))
 120             (when jid (push (cons jid dest) links)))
 121           (let ((cid (id (cdr (assq :category citation)))))
 122             (when cid (push (cons cid dest) links)))))
 123       ;; build the json string
 124       (format "{\"nodes\":[%s],\"links\":[%s]}"
 125               (mapconcat
 126                (lambda (pair)
 127                  (format "{\"name\":%S,\"group\":%d}"
 128                          (car pair) (cdr pair)))
 129                nodes ",")
 130               (mapconcat
 131                (lambda (link)
 132                  (format "{\"source\":%d,\"target\":%d,\"value\":1}"
 133                          (car link) (cdr link)))
 134                (meta-to-links meta nodes) ",")))))
 135
 136 (provide 'org-bibtex-extras)
 137 ;;; org-bibtex-extras ends here