dotemacs

My Emacs configuration
git clone git://git.entf.net/dotemacs
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oc-bibtex.el (2901B)

      1 ;;; oc-bibtex.el --- Vanilla citation processor for LaTeX -*- lexical-binding: t; -*-
      2 
      3 ;; Copyright (C) 2021-2023 Free Software Foundation, Inc.
      4 
      5 ;; Author: Nicolas Goaziou <mail@nicolasgoaziou.fr>
      6 
      7 ;; This file is part of GNU Emacs.
      8 
      9 ;; GNU Emacs is free software: you can redistribute it and/or modify
     10 ;; it under the terms of the GNU General Public License as published by
     11 ;; the Free Software Foundation, either version 3 of the License, or
     12 ;; (at your option) any later version.
     13 
     14 ;; GNU Emacs is distributed in the hope that it will be useful,
     15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
     16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     17 ;; GNU General Public License for more details.
     18 
     19 ;; You should have received a copy of the GNU General Public License
     20 ;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
     21 
     22 ;;; Commentary:
     23 
     24 ;; This library registers the `bibtex' citation processor, which
     25 ;; provides the "export" capability for citations.  It doesn't require
     26 ;; any LaTeX package.
     27 ;;
     28 ;; It supports the following citation styles:
     29 ;;
     30 ;; - nocite (n),
     31 ;; - default.
     32 ;;
     33 ;; Only suffixes are supported.  Prefixes are ignored.
     34 ;;
     35 ;; Bibliography should consist of ".bib" files only.
     36 
     37 ;;; Code:
     38 
     39 (require 'org-macs)
     40 (org-assert-version)
     41 
     42 (require 'oc)
     43 
     44 (declare-function org-element-property "org-element" (property element))
     45 
     46 (declare-function org-export-data "org-export" (data info))
     47 
     48 
     49 ;;; Export capability
     50 (defun org-cite-bibtex-export-bibliography (_keys files style &rest _)
     51   "Print references from bibliography FILES.
     52 FILES is a list of absolute file names.  STYLE is the bibliography style, as
     53 a string or nil."
     54   (concat (and style (format "\\bibliographystyle{%s}\n" style))
     55           (format "\\bibliography{%s}"
     56                   (mapconcat #'file-name-sans-extension
     57                              files
     58                              ","))))
     59 
     60 (defun org-cite-bibtex-export-citation (citation style _ info)
     61   "Export CITATION object.
     62 STYLE is the citation style, as a pair of strings or nil.  INFO is the export
     63 state, as a property list."
     64   (let ((references (org-cite-get-references citation)))
     65     (format "\\%s%s{%s}"
     66             (pcase style
     67               (`(,(or "nocite" "n") . ,_) "nocite")
     68               (_ "cite"))
     69             (let ((suffix (cdr (org-cite-main-affixes citation))))
     70               (if suffix
     71                   (format "[%s]" (org-trim (org-export-data suffix info)))
     72                 ""))
     73             (mapconcat (lambda (r) (org-element-property :key r))
     74                        references
     75                        ","))))
     76 
     77 
     78 ;;; Register `bibtex' processor
     79 (org-cite-register-processor 'bibtex
     80   :export-bibliography #'org-cite-bibtex-export-bibliography
     81   :export-citation #'org-cite-bibtex-export-citation
     82   :cite-styles
     83   '((("nocite" "n"))
     84     (("nil"))))
     85 
     86 (provide 'oc-bibtex)
     87 ;;; oc-bibtex.el ends here