138 lines
5.1 KiB
EmacsLisp
138 lines
5.1 KiB
EmacsLisp
;;; org-bibtex-extras --- extras for working with org-bibtex entries
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;; Copyright (C) 2008-2018 Free Software Foundation, Inc.
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;; Author: Eric Schulte <eric dot schulte at gmx dot com>
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;; Keywords: outlines, hypermedia, bibtex, d3
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;; Homepage: https://orgmode.org
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;; Version: 0.01
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;; This file is not yet part of GNU Emacs.
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Warning: This should certainly be considered EXPERIMENTAL and still
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;; in development, feedback is welcome, but don't expect it
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;; to work.
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;; This file add some extra functionality to your bibtex entries which
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;; are stored as Org-mode headlines using org-bibtex.el. Most
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;; features expect that you keep all of your reading notes in a single
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;; file, set the `obe-bibtex-file' variable to the path to this file.
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;;
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;; - d3 view :: d3 is a Javascript library which supports interactive
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;; display of graphs. To view your citations as a d3
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;; graph, execute the following which will create a .json
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;; export of your references file, then grab a copy of
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;; d3, edit examples/force/force.js to replace
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;;
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;; var source`"miserables.json";
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;;
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;; with
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;;
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;; var source`"your-references.json";
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;;
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;; then view examples/force/force.html in your browser.
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;;
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;; - HTML export :: Customize the `obe-html-link-base' variable so
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;; that it points to an html export of your
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;; references, then add the following to your html
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;; export hook, and citations will be resolved during
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;; html export.
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;;
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;; (add-hook 'org-export-first-hook
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;; (lambda ()
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;; (when (equal org-export-current-backend 'html)
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;; (obe-html-export-citations))))
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;;; Code:
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(require 'org-bibtex)
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(declare-function org-trim "org" (s &optional keep-lead))
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(defcustom obe-bibtex-file nil "File holding bibtex entries.")
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(defcustom obe-html-link-base nil
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"Base of citation links.
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For example, to point to your `obe-bibtex-file' use the following.
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(setq obe-html-link-base (format \"file:%s\" obe-bibtex-file))
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")
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(defvar obe-citations nil)
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(defun obe-citations ()
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"Return all citations from `obe-bibtex-file'."
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(or obe-citations
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(save-window-excursion
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(find-file (or obe-bibtex-file
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(error "`obe-bibtex-file' has not been configured")))
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(goto-char (point-min))
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(while (re-search-forward " :CUSTOM_ID: \\(.+\\)$" nil t)
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(push (org-no-properties (match-string 1))
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obe-citations))
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obe-citations)))
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(defun obe-html-export-citations ()
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"Convert all \\cite{...} citations in the current file into HTML links."
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(save-excursion
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(goto-char (point-min))
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(while (re-search-forward "\\\\cite{\\([^\000}]+\\)}" nil t)
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(replace-match
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(save-match-data
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(mapconcat (lambda (c) (format "[[%s#%s][%s]]" obe-html-link-base c c))
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(mapcar #'org-trim
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(split-string (match-string 1) ",")) ", "))))))
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(defun obe-meta-to-json (meta &optional fields)
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"Turn a list of META data from citations into a string of json."
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(let ((counter 1) nodes links)
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(flet ((id (it) (position it nodes :test #'string= :key #'car))
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(col (k) (mapcar (lambda (r) (cdr (assoc k r))) meta))
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(add (lst)
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(dolist (el lst) (push (cons el counter) nodes))
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(incf counter)))
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;; build the nodes of the graph
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(add (col :title))
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(add (remove-if (lambda (author) (string-match "others" author))
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(remove-duplicates (apply #'append (col :authors))
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:test #'string=)))
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(dolist (field fields)
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(add (remove-duplicates (col field) :test #'string=)))
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;; build the links in the graph
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(dolist (citation meta)
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(let ((dest (id (cdr (assq :title citation)))))
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(dolist (author (mapcar #'id (cdr (assq :authors citation))))
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(when author (push (cons author dest) links)))
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(let ((jid (id (cdr (assq :journal citation)))))
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(when jid (push (cons jid dest) links)))
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(let ((cid (id (cdr (assq :category citation)))))
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(when cid (push (cons cid dest) links)))))
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;; build the json string
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(format "{\"nodes\":[%s],\"links\":[%s]}"
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(mapconcat
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(lambda (pair)
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(format "{\"name\":%S,\"group\":%d}"
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(car pair) (cdr pair)))
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nodes ",")
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(mapconcat
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(lambda (link)
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(format "{\"source\":%d,\"target\":%d,\"value\":1}"
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(car link) (cdr link)))
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(meta-to-links meta nodes) ",")))))
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(provide 'org-bibtex-extras)
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;;; org-bibtex-extras ends here
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