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;;; km-bib.el --- Bibliography configuration
;; Copyright (C) 2012-2020 Kyle Meyer <kyle@kyleam.com>
;; Author: Kyle Meyer <kyle@kyleam.com>
;; URL: https://git.kyleam.com/emacs.d
;; 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/>.
;;; Code:
(require 'bibtex)
(require 'org)
(defvar km/bibtex-unimportant-title-words
'("a" "an" "and" "as" "at" "but" "by" "for" "in" "nor"
"of" "on" "or" "out" "so" "the" "to" "up" "yet")
"Words to ignore when running `km/bibtex-use-title-case'.")
(defun km/bibtex-use-title-case ()
"Convert title of current BibTeX entry to title case.
Change words in `km/bibtex-unimportant-title-words' to lower
case, unless the word is the first word in the title. Capitalize
all other words unless they are protected by brackets."
(save-excursion
(bibtex-beginning-of-entry)
(let ((bounds (bibtex-search-forward-field "title" t)))
(when bounds
(let* ((beg (1+ (bibtex-start-of-text-in-field bounds)))
(end (1- (bibtex-end-of-text-in-field bounds)))
(title-words (split-string
(buffer-substring-no-properties beg end)))
(cap-if-letter
(lambda (word)
(let ((case-fold-search nil))
(if (string-match-p "\\`[a-z]" word)
(capitalize word)
word))))
(choose-case
(lambda (word)
(funcall (if (member (downcase word)
km/bibtex-unimportant-title-words)
#'downcase
cap-if-letter)
word))))
(goto-char beg)
(delete-region beg end)
(insert (mapconcat
#'identity
(cons (funcall cap-if-letter (car title-words))
(mapcar choose-case (cdr title-words)))
" "))
(fill-paragraph))))))
(defun km/bibtex-single-space-author-list ()
"Convert multiple spaces in author list to single space."
(save-excursion
(bibtex-beginning-of-entry)
(let* ((bounds (bibtex-search-forward-field "author" t))
(beg (bibtex-start-of-text-in-field bounds)))
(when bounds
(goto-char beg)
(while (re-search-forward "\\(\\s-+\\) and"
(bibtex-end-of-text-in-field bounds) t)
(replace-match "" nil nil nil 1))
(goto-char beg)
(fill-paragraph)))))
(defun km/bibtex-set-coding-system ()
(set-buffer-file-coding-system 'utf-8))
(defun km/bibtex-remove-entry-space ()
"Remove space in entry header.
For example, convert
@article {
to
@article{"
(save-excursion
(bibtex-beginning-of-entry)
(when (looking-at "@\\w+\\(\\s-+\\)")
(replace-match "" nil nil nil 1))))
(defun km/bibtex-downcase-entry ()
(save-excursion
(bibtex-beginning-of-entry)
(when (looking-at "^@\\([^{]+\\){")
(replace-match (downcase (match-string-no-properties 1))
'fixedcase nil nil 1))))
(defun km/bibtex-pages-use-double-hyphen ()
"Use double hyphen for page range."
(save-excursion
(bibtex-beginning-of-entry)
(let ((bounds (bibtex-search-forward-field "pages" t)))
(when bounds
(goto-char (bibtex-start-of-text-in-field bounds))
(and (re-search-forward "[^A-z0-9]*-[^A-z0-9]*"
(bibtex-end-of-text-in-field bounds) t)
(replace-match "--"))))))
(defun km/bibtex-remove-doi-leader ()
"Remove leading part (http:...) of doi URL."
(save-excursion
(bibtex-beginning-of-entry)
(let ((bounds (bibtex-search-forward-field "doi" t)))
(when bounds
(goto-char (bibtex-start-of-text-in-field bounds))
(and (re-search-forward "http://dx.doi.org/"
(bibtex-end-of-text-in-field bounds) t)
(replace-match ""))))))
(defun km/bibtex-downcase-keys ()
"Downcase keys that are all caps."
(save-excursion
(bibtex-beginning-of-entry)
(let (case-fold-search)
(while (re-search-forward "^\\s-*\\([A-Z]+\\)\\s-*=" nil t)
(replace-match (downcase (match-string 1)) 'fixedcase
nil nil 1)))))
(defun km/bibtex-downcase-author-and ()
(save-excursion
(bibtex-beginning-of-entry)
(let ((bounds (bibtex-search-forward-field "author" t)))
(when bounds
(goto-char (bibtex-start-of-text-in-field bounds))
(let (case-fold-search)
(while (re-search-forward "\\bAND\\b"
(bibtex-end-of-text-in-field bounds) t)
(replace-match (downcase (match-string 0)) 'fixedcase)))))))
(defun km/bibtex-sub-journal ()
(when (boundp 'km/bibtex-journal-substitutions)
(save-excursion
(bibtex-beginning-of-entry)
(let ((bounds (bibtex-search-forward-field "journal" t)))
(when bounds
(let* ((beg (1+ (bibtex-start-of-text-in-field bounds)))
(end (1- (bibtex-end-of-text-in-field bounds)))
(journ (replace-regexp-in-string
"[ \n]+" " "
(buffer-substring-no-properties beg end)))
(sub (assoc-string journ km/bibtex-journal-substitutions)))
(when sub
(goto-char beg)
(delete-region beg end)
(insert (cdr sub))
(fill-paragraph))))))))
(defvar km/bibtex-article-fields-to-delete
'("abstract" "issn" "pubmedid" "url" "eprint" "keywords"))
(defun km/bibtex-delete-article-fields ()
(save-excursion
(when (and (bibtex-beginning-of-entry)
(looking-at bibtex-entry-maybe-empty-head)
(string= (downcase (bibtex-type-in-head)) "article"))
(dolist (f km/bibtex-article-fields-to-delete)
(let (bounds)
;; Make sure field is removed even if it is repeated.
(while (progn (bibtex-beginning-of-entry)
(setq bounds (bibtex-search-forward-field f t)))
(goto-char (bibtex-end-of-field bounds))
(skip-chars-backward " \t\n")
(delete-region (bibtex-start-of-field bounds)
(point))))))))
(defun km/bibtex-author-last-name-first ()
"Use last name first format for authors.
Convert
name1 name2 name3 and ...
to
name3, name1 name2 and ..."
(interactive)
(save-excursion
(bibtex-beginning-of-entry)
(let ((bounds (bibtex-search-forward-field "author" t)))
(when bounds
(let* ((beg (1+ (bibtex-start-of-text-in-field bounds)))
(end (1- (bibtex-end-of-text-in-field bounds)))
(author-list (buffer-substring-no-properties beg end))
(author-re (rx line-start
(group (one-or-more not-newline))
(syntax whitespace)
(group (one-or-more (not (syntax whitespace))))
line-end))
authors)
(with-temp-buffer
(insert (replace-regexp-in-string
" and " "\n"
(replace-regexp-in-string
"[\n\t ]+" " " author-list)))
(goto-char (point-min))
(while (re-search-forward author-re nil t)
(push (concat (match-string 2) ", " (match-string 1))
authors)))
(goto-char beg)
(delete-region beg end)
(insert (mapconcat #'identity (nreverse authors) " and "))
(fill-paragraph))))))
;;;###autoload
(defun km/browse-doi (doi)
"Open DOI in browser.
When called interactively, take the DOI from the text under
point. The link is opened using the settings of
`org-doi-server-url'."
(interactive (list (km/doi-at-point)))
(browse-url (org-link-escape-browser (concat org-doi-server-url doi))))
;;;###autoload
(defun km/copy-doi-as-kill ()
"Copy DOI at point to kill ring."
(interactive)
(when-let ((doi (km/doi-at-point)))
(kill-new (message "%s" (concat "doi:" doi)))))
(defun km/doi-at-point ()
"Return DOI at point."
(save-excursion
(skip-chars-backward "-.A-z0-9/")
(and (looking-at "\\(doi:[ \t\n]*\\)*\\([-./A-z0-9]+[A-z0-9]\\)\\b")
(match-string-no-properties 2))))
(provide 'km-bib)
;;; km-bib.el ends here
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