Files
emacs/lisp/org-contrib/org-bibtex-extras.el
2025-02-26 20:16:44 +01:00

147 lines
5.5 KiB
EmacsLisp

;;; org-bibtex-extras --- extras for working with org-bibtex entries -*- lexical-binding: t; -*-
;; Copyright (C) 2008-2021 Free Software Foundation, Inc.
;; Author: Eric Schulte <eric dot schulte at gmx dot com>
;; Keywords: outlines, hypermedia, bibtex, d3
;; Homepage: https://git.sr.ht/~bzg/org-contrib
;; Version: 0.01
;; This file is not 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 <https://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 'ol-bibtex)
(declare-function org-trim "org" (s &optional keep-lead))
(defgroup org-bibtex-extras nil
"Extras for working with org-bibtex entries."
:group 'org-bibtex)
(defcustom obe-bibtex-file nil
"File holding bibtex entries."
:type 'file
:group 'org-bibtex-extras)
(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))"
:type 'string
:group 'org-bibtex-extras)
(defvar obe-citations nil)
(defun obe-citations ()
"Return all citations from `obe-bibtex-file'."
(or obe-citations
(save-window-excursion
(find-file (or obe-bibtex-file
(error "`obe-bibtex-file' has not been configured")))
(goto-char (point-min))
(while (re-search-forward " :CUSTOM_ID: \\(.+\\)$" nil t)
(push (org-no-properties (match-string 1))
obe-citations))
obe-citations)))
(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-trim
(split-string (match-string 1) ",")) ", "))))))
;; FIXME: `meta-to-links' is not a known function.
;; (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)
;; (cl-flet ((id (it) (cl-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))
;; (cl-incf counter)))
;; ;; build the nodes of the graph
;; (add (col :title))
;; (add (cl-remove-if (lambda (author) (string-match "others" author))
;; (cl-remove-duplicates (apply #'append (col :authors))
;; :test #'string=)))
;; (dolist (field fields)
;; (add (cl-remove-duplicates (col field) :test #'string=)))
;; ;; build the links in the graph
;; (dolist (citation meta)
;; (let ((dest (id (cdr (assq :title citation)))))
;; (dolist (author (mapcar #'id (cdr (assq :authors citation))))
;; (when author (push (cons author dest) links)))
;; (let ((jid (id (cdr (assq :journal citation)))))
;; (when jid (push (cons jid dest) links)))
;; (let ((cid (id (cdr (assq :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