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emacs/lisp/org-ref/org-ref-bibliography-links.el
2025-11-25 19:52:03 +01:00

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EmacsLisp

;;; org-ref-bibliography-links.el --- Bibliography and bibliographystyle links -*- lexical-binding: t; -*-
;;
;; Copyright (C) 2024 John Kitchin
;; Author: John Kitchin <jkitchin@andrew.cmu.edu>
;; Keywords: convenience
;; 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 of the License, 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 this program. If not, see <http://www.gnu.org/licenses/>.
;;
;;; Commentary:
;;
;;; Code:
(defcustom org-ref-latex-bib-resolve-func #'file-relative-name
"Function to expand paths to the bibliography file on latex export.
Use this to convert a path to what you want, e.g. relative to
some directory, absolute, etc."
:type 'function
:group 'org-ref)
(defcustom org-ref-validate-bibliography nil
"If non-nil, validate bibliography files in fontification.
This can be slow, so we don't do it by default."
:type 'boolean
:group 'org-ref)
;;* bibliography* links
(defun org-ref-get-bibfile-path (bibfile)
"Get a path to BIBFILE as local file, or using kpsewhich.
This should allow you to use a bib file that is setup with TeX
variables like BIBINPUTS."
(or (when (file-exists-p bibfile) bibfile)
(let ((f (replace-regexp-in-string
"\n$" ""
(shell-command-to-string (format "kpsewhich %s" bibfile)))))
(unless (string= "" f)
f))))
(defun org-ref-bibliography*-export (cmd bibfiles _desc backend)
"Exporting function for bibliography links.
To be used as a partial function e.g.
(apply-partially \"bibliography\" 'org-ref-bibliography*-export)
Argument CMD is the command it should export to.
Argument BIBFILES is a comma-separated list of strings.
Argument BACKEND is the export backend."
(cond
((eq backend 'latex)
(format "%s{%s}"
cmd
(if (not (string= "" bibfiles))
(replace-regexp-in-string
"\\.bib" ""
(mapconcat
'identity
(mapcar
(lambda (f)
(funcall org-ref-latex-bib-resolve-func (org-ref-get-bibfile-path f)))
(split-string bibfiles ","))
","))
"")))))
(defun org-ref-bibliography-activate (start end path _bracketp)
"Activate a bibliography link.
Adds a warning face to non-existent or invalid bib-files.
START and END are the bounds of the link.
PATH is a comma-separated list of bibfiles."
(goto-char start)
(cl-loop for p in (split-string path ",") do
(setq p (string-trim p))
(search-forward p)
(setq p (org-ref-get-bibfile-path p))
(put-text-property (match-beginning 0) (match-end 0) 'org-ref-bibfile p)
(put-text-property (match-beginning 0) (match-end 0) 'help-echo (format "File exists at %s" p))
;; activate files that don't exist
(when (or (null p) (not (file-exists-p p)))
(put-text-property (match-beginning 0) (match-end 0)
'face 'font-lock-warning-face)
(put-text-property (match-beginning 0) (match-end 0)
'help-echo "This file was not found."))
(when (and p (file-exists-p p))
(when org-ref-validate-bibliography
;; Let's do a validation, but only if it has changed since the last time we checked.
(let* ((mod-time-last-check (or (get-text-property (match-beginning 0)
'mod-time-last-check)
'(0 0 0 0)))
(last-modified (file-attribute-modification-time (file-attributes p)))
(bibtex-valid))
(if (time-equal-p mod-time-last-check last-modified)
(setq bibtex-valid (get-text-property (match-beginning 0) 'bibtex-valid))
;; the times were not equal, so we check and store the state.
(setq bibtex-valid (save-match-data
(with-current-buffer (find-file-noselect p)
(bibtex-validate))))
(put-text-property (match-beginning 0)
(match-end 0)
'mod-time-last-check
last-modified)
(put-text-property (match-beginning 0)
(match-end 0)
'bibtex-valid
bibtex-valid))
(unless bibtex-valid
(put-text-property (match-beginning 0) (match-end 0)
'face 'font-lock-warning-face)
(put-text-property (match-beginning 0) (match-end 0)
'help-echo "This file did not pass `bibtex-validate'.")))))))
(defun org-ref-bibliography*-follow (_path)
"Function to follow bibliography links."
(interactive)
(save-excursion
(unless (get-text-property (point) 'org-ref-bibfile)
(re-search-forward ":"))
(find-file (org-ref-get-bibfile-path (get-text-property (point) 'org-ref-bibfile)))))
(defun org-ref-printbibliography-export (options _desc backend)
"Export function for printbibliography links.
Argument OPTIONS are the options used for the command.
Optional argument BACKEND is the export backend."
(cond
((eq backend 'latex)
;; write out the biblatex bibliography command
(format "\\printbibliography%s"
(if (not (string= "" options))
(format "[%s]" options)
"")))))
(defvar org-ref-cite-types)
(declare-function org-element-map "org-element")
(declare-function org-element-property "org-element")
(declare-function org-element-parse-buffer "org-element")
(declare-function bibtex-completion-show-entry "bibtex-completion")
(declare-function org-ref-possible-bibfiles "org-ref-core")
(declare-function org-ref-parse-cite-path "org-ref-citation-links")
(defun org-ref-insert-bibliography-link ()
"Insert a bibliography link for the files used in this buffer."
(interactive)
(let* ((cite-links (org-element-map (org-element-parse-buffer) 'link
(lambda (lnk)
(when (assoc (org-element-property :type lnk) org-ref-cite-types)
lnk))))
(keys (delete-dups (cl-loop for cl in cite-links append
(cl-loop for ref in (plist-get (org-ref-parse-cite-path
(org-element-property :path cl))
:references)
collect (plist-get ref :key)))))
(files (delete-dups (cl-loop for key in keys collect
(save-window-excursion
(bibtex-completion-show-entry (list key))
(buffer-file-name))))))
(insert (format "[[bibliography:%s]]" (string-join files ",")))))
(defun org-ref-bibliography-complete (&optional arg)
"Completion function for bibliography links."
(concat "bibliography:"
(completing-read "Bibliography file: " (org-ref-possible-bibfiles))))
(defun org-ref-nobibliography-complete (&optional arg)
"Completion function for bibliography links."
(concat "nobibliography:"
(completing-read "Bibliography file: " (org-ref-possible-bibfiles))))
(defvar org-ref-default-citation-link)
(defun org-ref-bibtex-store-link ()
"Store a link from a bibtex file. Only supports the cite link.
This essentially the same as the store link in org-bibtex, but it
creates a cite link."
(when (eq major-mode 'bibtex-mode)
(let ((link (concat org-ref-default-citation-link
":&"
(save-excursion
(bibtex-beginning-of-entry)
(cdr (assoc "=key=" (bibtex-parse-entry)))))))
(push (list link) org-stored-links)
(car org-stored-links))))
;; ** bibliography* links
(org-link-set-parameters "bibliography"
:follow #'org-ref-bibliography*-follow
:store #'org-ref-bibtex-store-link
:complete #'org-ref-bibliography-complete
:help-echo "Bibliography link"
:export (apply-partially 'org-ref-bibliography*-export "\\bibliography")
:activate-func #'org-ref-bibliography-activate
:face 'org-link)
(org-link-set-parameters "nobibliography"
:complete #'org-ref-nobibliography-complete
:store #'org-ref-bibtex-store-link
:help-echo "No bibliography link"
:activate-func #'org-ref-bibliography-activate
:follow #'org-ref-bibliography*-follow
:export (apply-partially 'org-ref-bibliography*-export "\\nobibliography")
:face 'org-link)
(org-link-set-parameters "nobibliography*"
:complete #'org-ref-nobibliography-complete
:store #'org-ref-bibtex-store-link
:help-echo "No bibliography link"
:activate-func #'org-ref-bibliography-activate
:follow #'org-ref-bibliography*-follow
:export (apply-partially 'org-ref-bibliography*-export "\\nobibliography*")
:face 'org-link)
(org-link-set-parameters "printbibliography"
:export #'org-ref-printbibliography-export)
;; Note I removed the addbibresource link, it goes in the header, not the document.
;; *** bibliographystyle
(defvar-local org-ref-bst-styles nil
"A list of known bibliography styles. Used to cache results.")
(defun org-ref-clear-bst-cache ()
"Clear `org-ref-bst-styles' to reload it."
(interactive)
(setq org-ref-bst-styles nil))
(defun org-ref-bibliography-styles ()
"Return a list of known bibliography styles.
Returns `org-ref-bst-styles' or sets it and returns it."
(or org-ref-bst-styles
(setq org-ref-bst-styles
(mapcar 'file-name-nondirectory
(mapcar 'file-name-sans-extension
(org-ref--flatten-list
(mapcar (lambda (path)
(setq path (replace-regexp-in-string "!" "" path))
(when (file-directory-p path)
(org-ref--directory-files path (lambda (f) (org-ref--file-ext-p f "bst")))))
(split-string
;; https://tex.stackexchange.com/questions/431948/get-a-list-of-installed-bibliography-styles-with-kpsewhich?noredirect=1#comment1082436_431948
(shell-command-to-string "kpsewhich -expand-path '$BSTINPUTS'")
":"))))))))
(defun org-ref-bibliographystyle-complete-link (&optional arg)
"Completion function for bibliography style links.
ARG is a not used."
(when (executable-find "kpsewhich")
(concat "bibliographystyle:"
(completing-read "Style: " (org-ref-bibliography-styles)))))
(defun org-ref-bibliographystyle-activate (start _end path _bracketp)
"Activation function for bibliography styles.
START is the beginning position of the link.
Optional argument PATH contains the selected style."
(unless (member path (org-ref-bibliography-styles))
(goto-char start)
(search-forward path)
(put-text-property (match-beginning 0) (match-end 0) 'face 'font-lock-warning-face)
(put-text-property (match-beginning 0) (match-end 0) 'help-echo "Unrecognized style")))
(defun org-ref-bibliographystyle-export (style _desc backend)
"Export function for bibliographystyle links.
Argument STYLE is the desired style.
Optional argument BACKEND is the export backend."
(cond
((or (eq backend 'latex)
(eq backend 'beamer))
;; write out the latex bibliography command
(format "\\bibliographystyle{%s}" style))
;; No other backend needs this I think
(t
"")))
(org-link-set-parameters "bibliographystyle"
:complete #'org-ref-bibliographystyle-complete-link
:activate-func #'org-ref-bibliographystyle-activate
:export #'org-ref-bibliographystyle-export)
(provide 'org-ref-bibliography-links)
;;; org-ref-bibliography-links.el ends here
;; Local Variables:
;; byte-compile-warnings: (not docstrings)
;; End: