198 lines
8.1 KiB
EmacsLisp
198 lines
8.1 KiB
EmacsLisp
;;; oc-natbib.el --- Citation processor using natbib LaTeX package -*- lexical-binding: t; -*-
|
||
|
||
;; Copyright (C) 2021 Free Software Foundation, Inc.
|
||
|
||
;; Author: Nicolas Goaziou <mail@nicolasgoaziou.fr>
|
||
|
||
;; This file is part of GNU Emacs.
|
||
|
||
;; GNU Emacs 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 of the License, or
|
||
;; (at your option) any later version.
|
||
|
||
;; GNU Emacs 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:
|
||
|
||
;; This library registers the `natbib' citation processor, which provides the
|
||
;; "export" capability for citations.
|
||
|
||
;; The processor relies on "natbib" LaTeX package. As such it ensures that the
|
||
;; package is properly required in the document's preamble. More accurately, it
|
||
;; will use any "\\usepackage{natbib}" command already present in the document
|
||
;; (e.g., through `org-latex-packages-alist'), or insert one using options
|
||
;; defined in `org-cite-natbib-options'.
|
||
|
||
;; It supports the following citation styles:
|
||
;;
|
||
;; - author (a), including caps (c), and full (f) variants,
|
||
;; - noauthor (na), including bare (b) variant,
|
||
;; - text (t), including bare (b), caps (c), full (f), bare-caps (bc),
|
||
;; bare-full (bf), caps-full (cf), and bare-caps-full (bcf) variants,
|
||
;; - default, including bare (b), caps (c), full (f), bare-caps (bc),
|
||
;; bare-full (bf), caps-full (cf), and bare-caps-full (bcf) variants.
|
||
|
||
;; Bibliography accepts any style supported by "natbib" package.
|
||
|
||
;;; Code:
|
||
(require 'oc)
|
||
|
||
(declare-function org-element-property "org-element" (property element))
|
||
|
||
(declare-function org-export-data "org-export" (data info))
|
||
|
||
|
||
;;; Customization
|
||
(defcustom org-cite-natbib-options nil
|
||
"List of options added to \"natbib\" package.
|
||
If \"natbib\" package is already required in the document, e.g., through
|
||
`org-latex-packages-alist' variable, these options are ignored."
|
||
:group 'org-cite
|
||
:package-version '(Org . "9.5")
|
||
:type
|
||
'(set
|
||
(const :tag "use round parentheses (default)" round)
|
||
(const :tag "use square brackets" square)
|
||
(const :tag "use curly braces" curly)
|
||
(const :tag "use angle brackets" angle)
|
||
(const :tag "separate multiple citations with colons (default)" colon)
|
||
(const :tag "separate multiple citations with comas" comma)
|
||
(const :tag "generate author-year citations" authoryear)
|
||
(const :tag "generate numerical citations" numbers)
|
||
(const :tag "generate superscripted numerical citations" super)
|
||
(const :tag "order multiple citations according to the list of references" sort)
|
||
(const :tag "order as above, but numerical citations are compressed if possible" sort&compress)
|
||
(const :tag "display full author list on first citation, abbreviate the others" longnamesfirst)
|
||
(const :tag "redefine \\thebibliography to issue \\section* instead of \\chapter*" sectionbib)
|
||
(const :tag "keep all the authors' names in a citation on one line" nonamebreak)))
|
||
|
||
|
||
;;; Internal functions
|
||
(defun org-cite-natbib--style-to-command (style)
|
||
"Return command name to use according to STYLE pair."
|
||
(pcase style
|
||
;; "author" style.
|
||
(`(,(or "author" "a") . ,variant)
|
||
(pcase variant
|
||
((or "caps" "c") "\\Citeauthor")
|
||
((or "full" "f") "\\citeauthor*")
|
||
(_ "\\citeauthor")))
|
||
;; "noauthor" style.
|
||
(`(,(or "noauthor" "na") . ,variant)
|
||
(pcase variant
|
||
((or "bare" "b") "\\citeyear")
|
||
(_ "\\citeyearpar")))
|
||
;; "nocite" style.
|
||
(`(,(or "nocite" "n") . ,_) "\\nocite")
|
||
;; "text" style.
|
||
(`(,(or "text" "t") . ,variant)
|
||
(pcase variant
|
||
((or "bare" "b") "\\citealt")
|
||
((or "caps" "c") "\\Citet")
|
||
((or "full" "f") "\\citet*")
|
||
((or "bare-caps" "bc") "\\Citealt")
|
||
((or "bare-full" "bf") "\\citealt*")
|
||
((or "caps-full" "cf") "\\Citet*")
|
||
((or "bare-caps-full" "bcf") "\\Citealt*")
|
||
(_ "\\citet")))
|
||
;; Default ("nil") style.
|
||
(`(,_ . ,variant)
|
||
(pcase variant
|
||
((or "bare" "b") "\\citealp")
|
||
((or "caps" "c") "\\Citep")
|
||
((or "full" "f") "\\citep*")
|
||
((or "bare-caps" "bc") "\\Citealp")
|
||
((or "bare-full" "bf") "\\citealp*")
|
||
((or "caps-full" "cf") "\\Citep*")
|
||
((or "bare-caps-full" "bcf") "\\Citealp*")
|
||
(_ "\\citep")))
|
||
;; This should not happen.
|
||
(_ (error "Invalid style: %S" style))))
|
||
|
||
(defun org-cite-natbib--build-optional-arguments (citation info)
|
||
"Build optional arguments for citation command.
|
||
CITATION is the citation object. INFO is the export state, as a property list."
|
||
(let* ((origin (pcase (org-cite-get-references citation)
|
||
(`(,reference) reference)
|
||
(_ citation)))
|
||
(suffix (org-element-property :suffix origin))
|
||
(prefix (org-element-property :prefix origin)))
|
||
(concat (and prefix (format "[%s]" (org-trim (org-export-data prefix info))))
|
||
(cond
|
||
(suffix (format "[%s]" (org-trim (org-export-data suffix info))))
|
||
(prefix "[]")
|
||
(t nil)))))
|
||
|
||
(defun org-cite-natbib--build-arguments (citation)
|
||
"Build arguments for citation command for CITATION object."
|
||
(format "{%s}"
|
||
(mapconcat #'identity
|
||
(org-cite-get-references citation t)
|
||
",")))
|
||
|
||
|
||
;;; Export capability
|
||
(defun org-cite-natbib-export-bibliography (_keys files style &rest _)
|
||
"Print references from bibliography FILES.
|
||
FILES is a list of absolute file names. STYLE is the bibliography style, as
|
||
a string or nil."
|
||
(concat (and style (format "\\bibliographystyle{%s}\n" style))
|
||
(format "\\bibliography{%s}"
|
||
(mapconcat #'file-name-sans-extension
|
||
files
|
||
","))))
|
||
|
||
(defun org-cite-natbib-export-citation (citation style _ info)
|
||
"Export CITATION object.
|
||
STYLE is the citation style, as a pair of strings or nil. INFO is the export
|
||
state, as a property list."
|
||
(concat (org-cite-natbib--style-to-command style)
|
||
(org-cite-natbib--build-optional-arguments citation info)
|
||
(org-cite-natbib--build-arguments citation)))
|
||
|
||
(defun org-cite-natbib-use-package (output &rest _)
|
||
"Ensure output requires \"natbib\" package.
|
||
OUTPUT is the final output of the export process."
|
||
(with-temp-buffer
|
||
(save-excursion (insert output))
|
||
(when (search-forward "\\begin{document}" nil t)
|
||
;; Ensure there is a \usepackage{natbib} somewhere or add one.
|
||
(goto-char (match-beginning 0))
|
||
(let ((re (rx "\\usepackage" (opt "[" (*? nonl) "]") "{natbib}")))
|
||
(unless (re-search-backward re nil t)
|
||
(insert
|
||
(format "\\usepackage%s{natbib}\n"
|
||
(if (null org-cite-natbib-options)
|
||
""
|
||
(format "[%s]"
|
||
(mapconcat #'symbol-name
|
||
org-cite-natbib-options
|
||
","))))))))
|
||
(buffer-string)))
|
||
|
||
|
||
;;; Register `natbib' processor
|
||
(org-cite-register-processor 'natbib
|
||
:export-bibliography #'org-cite-natbib-export-bibliography
|
||
:export-citation #'org-cite-natbib-export-citation
|
||
:export-finalizer #'org-cite-natbib-use-package
|
||
:cite-styles
|
||
'((("author" "a") ("caps" "a") ("full" "f"))
|
||
(("noauthor" "na") ("bare" "b"))
|
||
(("text" "t")
|
||
("bare" "b") ("caps" "c") ("full" "f") ("bare-caps" "bc")
|
||
("bare-full" "bf") ("caps-full" "cf") ("bare-caps-full" "bcf"))
|
||
(("nil")
|
||
("bare" "b") ("caps" "c") ("full" "f") ("bare-caps" "bc")
|
||
("bare-full" "bf") ("caps-full" "cf") ("bare-caps-full" "bcf"))))
|
||
|
||
(provide 'oc-natbib)
|
||
;;; oc-natbib.el ends here
|