604 lines
24 KiB
EmacsLisp
604 lines
24 KiB
EmacsLisp
;;; oc-csl.el --- csl citation processor for Org -*- lexical-binding: t; -*-
|
||
|
||
;; Copyright (C) 2021 Free Software Foundation, Inc.
|
||
|
||
;; Author: Nicolas Goaziou <mail@nicolasgoaziou.fr>
|
||
|
||
;; 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 <https://www.gnu.org/licenses/>.
|
||
|
||
;;; Commentary:
|
||
|
||
;; This library registers the `csl' citation processor, which provides
|
||
;; the "export" capability for citations.
|
||
|
||
;; The processor relies on the external Citeproc Emacs library, which must be
|
||
;; available prior to loading this library.
|
||
|
||
;; By default, citations are rendered in Chicago author-date CSL style. You can
|
||
;; use another style file by specifying it in `org-cite-export-processors' or
|
||
;; from within the document by adding the file name to "cite_export" keyword
|
||
;;
|
||
;; #+cite_export: csl /path/to/style-file.csl
|
||
;; #+cite_export: csl "/path/to/style-file.csl"
|
||
;;
|
||
;; With the variable `org-cite-csl-styles-dir' set appropriately, the
|
||
;; above can even be shortened to
|
||
;;
|
||
;; #+cite_export: csl style-file.csl
|
||
;;
|
||
;; Styles can be downloaded, for instance, from the Zotero Style Repository
|
||
;; (<https://www.zotero.org/styles>). Dependent styles (which are not "unique"
|
||
;; in the Zotero Style Repository terminology) are not supported.
|
||
|
||
;; The processor uses the "en-US" CSL locale file shipped with Org for rendering
|
||
;; localized dates and terms in the references, independently of the language
|
||
;; settings of the Org document. Additional CSL locales can be made available
|
||
;; by setting `org-cite-csl-locales-dir' to a directory containing the locale
|
||
;; files in question (see <https://github.com/citation-style-language/locales>
|
||
;; for such files).
|
||
|
||
;; Bibliography is defined with the "bibliography" keyword. It supports files
|
||
;; with ".bib", ".bibtex", and ".json" extensions. References are exported using
|
||
;; the "print_bibliography" keyword.
|
||
|
||
;; The library supports the following citation styles:
|
||
;;
|
||
;; - noauthor (na), including bare (b), caps (c) and bare-caps (bc) variants,
|
||
;; - default style, including bare (b), caps (c) and bare-caps (bc) variants.
|
||
|
||
;; CSL styles recognize "locator" in citation references' suffix. For example,
|
||
;; in the citation
|
||
;;
|
||
;; [cite:see @Tarski-1965 chapter 1, for an example]
|
||
;;
|
||
;; "chapter 1" is the locator. The whole citation is rendered as
|
||
;;
|
||
;; (see Tarski 1965, chap. 1 for an example)
|
||
;;
|
||
;; in the default CSL style.
|
||
;;
|
||
;; The locator starts with a locator term, among "bk.", "bks.", "book", "chap.",
|
||
;; "chaps.", "chapter", "col.", "cols.", "column", "figure", "fig.", "figs.",
|
||
;; "folio", "fol.", "fols.", "number", "no.", "nos.", "line", "l.", "ll.",
|
||
;; "note", "n.", "nn.", "opus", "op.", "opp.", "page", "p.", "pp.", "paragraph",
|
||
;; "para.", "paras.", "¶", "¶¶", "§", "§§", "part", "pt.", "pts.", "section",
|
||
;; "sec.", "secs.", "sub verbo", "s.v.", "s.vv.", "verse", "v.", "vv.",
|
||
;; "volume", "vol.", and "vols.". It ends with the last comma or digit in the
|
||
;; suffix, whichever comes last, or runs till the end of the suffix.
|
||
;;
|
||
;; The part of the suffix before the locator is appended to reference's prefix.
|
||
;; If no locator term is used, but a number is present, then "page" is assumed.
|
||
|
||
;; This library was heavily inspired by and borrows from András Simonyi's
|
||
;; Citeproc Org (<https://github.com/andras-simonyi/citeproc-org>) library.
|
||
;; Many thanks to him!
|
||
|
||
;;; Code:
|
||
(require 'bibtex)
|
||
(require 'json)
|
||
(require 'org-cite)
|
||
|
||
(require 'citeproc nil t)
|
||
(declare-function citeproc-style-cite-note "ext:citeproc")
|
||
(declare-function citeproc-proc-style "ext:citeproc")
|
||
(declare-function citeproc-bt-entry-to-csl "ext:citeproc")
|
||
(declare-function citeproc-locale-getter-from-dir "ext:citeproc")
|
||
(declare-function citeproc-create "ext:citeproc")
|
||
(declare-function citeproc-citation-create "ext:citeproc")
|
||
(declare-function citeproc-append-citations "ext:citeproc")
|
||
(declare-function citeproc-render-citations "ext:citeproc")
|
||
(declare-function citeproc-render-bib "ext:citeproc")
|
||
|
||
(declare-function org-element-interpret-data "org-element" (data))
|
||
(declare-function org-element-map "org-element" (data types fun &optional info first-match no-recursion with-affiliated))
|
||
(declare-function org-element-property "org-element" (property element))
|
||
(declare-function org-element-put-property "org-element" (element property value))
|
||
|
||
(declare-function org-export-data "org-export" (data info))
|
||
(declare-function org-export-derived-backend-p "org-export" (backend &rest backends))
|
||
(declare-function org-export-get-footnote-number "org-export" (footnote info &optional data body-first))
|
||
|
||
|
||
;;; Customization
|
||
|
||
;;;; Location of CSL directories
|
||
(defcustom org-cite-csl-locales-dir nil
|
||
"Directory of CSL locale files.
|
||
If nil then only the fallback en-US locale will be available."
|
||
:group 'org-cite
|
||
:package-version '(Org . "9.5")
|
||
:type '(choice
|
||
(dir :tag "Locales directory")
|
||
(const :tag "Use en-US locale only" nil))
|
||
:safe t)
|
||
|
||
(defcustom org-cite-csl-styles-dir nil
|
||
"Directory of CSL style files.
|
||
When non-nil, relative style file names are expanded relatively to this
|
||
directory. This variable is ignored when style file is absolute."
|
||
:group 'org-cite
|
||
:package-version '(Org . "9.5")
|
||
:type '(choice
|
||
(dir :tag "Styles directory")
|
||
(const :tag "Use absolute file names" nil))
|
||
:safe t)
|
||
|
||
;;;; Citelinks
|
||
(defcustom org-cite-csl-link-cites t
|
||
"When non-nil, link cites to references."
|
||
:group 'org-cite
|
||
:package-version '(Org . "9.5")
|
||
:type 'boolean
|
||
:safe t)
|
||
|
||
(defcustom org-cite-csl-no-citelinks-backends '(ascii)
|
||
"List of export back-ends for which cite linking is disabled.
|
||
Cite linking for export back-ends derived from any of the back-ends listed here,
|
||
is also disabled."
|
||
:group 'org-cite
|
||
:package-version '(Org . "9.5")
|
||
:type '(repeat symbol)
|
||
:safe t)
|
||
|
||
;;;; Output-specific variables
|
||
(defcustom org-cite-csl-html-hanging-indent "1.5em"
|
||
"Size of hanging-indent for HTML output in valid CSS units."
|
||
:group 'org-cite
|
||
:package-version '(Org . "9.5")
|
||
:type 'string
|
||
:safe t)
|
||
|
||
(defcustom org-cite-csl-html-label-width-per-char "0.6em"
|
||
"Character width in CSS units for calculating entry label widths.
|
||
Used only when `second-field-align' is activated by the used CSL style."
|
||
:group 'org-cite
|
||
:package-version '(Org . "9.5")
|
||
:type 'string
|
||
:safe t)
|
||
|
||
(defcustom org-cite-csl-latex-hanging-indent "1.5em"
|
||
"Size of hanging-indent for LaTeX output in valid LaTeX units."
|
||
:group 'org-cite
|
||
:package-version '(Org . "9.5")
|
||
:type 'string
|
||
:safe t)
|
||
|
||
|
||
;;; Internal variables
|
||
(defconst org-cite-csl--etc-dir
|
||
(expand-file-name
|
||
(concat (file-name-directory (locate-library "oc"))
|
||
"../etc/csl/"))
|
||
"Directory \"etc/\" from repository.")
|
||
|
||
(defconst org-cite-csl--fallback-locales-dir org-cite-csl--etc-dir
|
||
"Fallback CSL locale files directory.")
|
||
|
||
(defconst org-cite-csl--fallback-style-file
|
||
(expand-file-name "chicago-author-date.csl"
|
||
org-cite-csl--etc-dir)
|
||
"Default CSL style file, or nil.
|
||
If nil then the Chicago author-date style is used as a fallback.")
|
||
|
||
(defconst org-cite-csl--label-alist
|
||
'(("bk." . "book")
|
||
("bks." . "book")
|
||
("book" . "book")
|
||
("chap." . "chapter")
|
||
("chaps." . "chapter")
|
||
("chapter" . "chapter")
|
||
("col." . "column")
|
||
("cols." . "column")
|
||
("column" . "column")
|
||
("figure" . "figure")
|
||
("fig." . "figure")
|
||
("figs." . "figure")
|
||
("folio" . "folio")
|
||
("fol." . "folio")
|
||
("fols." . "folio")
|
||
("number" . "number")
|
||
("no." . "number")
|
||
("nos." . "number")
|
||
("line" . "line")
|
||
("l." . "line")
|
||
("ll." . "line")
|
||
("note" . "note")
|
||
("n." . "note")
|
||
("nn." . "note")
|
||
("opus" . "opus")
|
||
("op." . "opus")
|
||
("opp." . "opus")
|
||
("page" . "page")
|
||
("p" . "page")
|
||
("p." . "page")
|
||
("pp." . "page")
|
||
("paragraph" . "paragraph")
|
||
("para." . "paragraph")
|
||
("paras." . "paragraph")
|
||
("¶" . "paragraph")
|
||
("¶¶" . "paragraph")
|
||
("§" . "paragraph")
|
||
("§§" . "paragraph")
|
||
("part" . "part")
|
||
("pt." . "part")
|
||
("pts." . "part")
|
||
("section" . "section")
|
||
("sec." . "section")
|
||
("secs." . "section")
|
||
("sub verbo" . "sub verbo")
|
||
("s.v." . "sub verbo")
|
||
("s.vv." . "sub verbo")
|
||
("verse" . "verse")
|
||
("v." . "verse")
|
||
("vv." . "verse")
|
||
("volume" . "volume")
|
||
("vol." . "volume")
|
||
("vols." . "volume"))
|
||
"Alist mapping locator names to locators.")
|
||
|
||
(defconst org-cite-csl--label-regexp
|
||
(rx word-start
|
||
(regexp (regexp-opt (mapcar #'car org-cite-csl--label-alist) t))
|
||
(0+ digit)
|
||
(or word-start line-end (any ?\s ?\t)))
|
||
"Regexp matching a label in a citation reference suffix.
|
||
Label is in match group 1.")
|
||
|
||
|
||
;;; Internal functions
|
||
(defun org-cite-csl--barf-without-citeproc ()
|
||
"Raise an error if Citeproc library is not loaded."
|
||
(unless (featurep 'citeproc) "Citeproc library is not loaded"))
|
||
|
||
(defun org-cite-csl--note-style-p (info)
|
||
"Non-nil when bibliography style implies wrapping citations in footnotes.
|
||
INFO is the export state, as a property list."
|
||
(citeproc-style-cite-note
|
||
(citeproc-proc-style
|
||
(org-cite-csl--processor info))))
|
||
|
||
(defun org-cite-csl--no-affixes-p (citation info)
|
||
"Non-nil when CITATION should be exported without affix.
|
||
INFO is the export data, as a property list."
|
||
(pcase (org-cite-citation-style citation info)
|
||
(`(,(or "noauthor" "na" `nil) . ,(or "bare" "b" "bare-caps" "bc")) t)
|
||
(_ nil)))
|
||
|
||
(defun org-cite-csl--capitalize-p (citation info)
|
||
"Non-nil when CITATION should be capitalized.
|
||
INFO is the export-data, as a property list."
|
||
(pcase (org-cite-citation-style citation info)
|
||
(`(,(or "noauthor" "na" `nil) . ,(or "caps" "c" "bare-caps" "bc")) t)
|
||
(_ nil)))
|
||
|
||
(defun org-cite-csl--no-author-p (reference info)
|
||
"Non-nil when citation REFERENCE should be exported without author.
|
||
INFO is the export data, as a property list."
|
||
(pcase (org-cite-citation-style (org-element-property :parent reference) info)
|
||
(`(,(or "noauthor" "na") . ,_) t)
|
||
(_ nil)))
|
||
|
||
(defun org-cite-csl--no-citelinks-p (info)
|
||
"Non-nil when export BACKEND should not create cite-reference links."
|
||
(or (not org-cite-csl-link-cites)
|
||
(and org-cite-csl-no-citelinks-backends
|
||
(apply #'org-export-derived-backend-p
|
||
(plist-get info :back-end)
|
||
org-cite-csl-no-citelinks-backends))
|
||
;; No references are being exported anyway.
|
||
(not (org-element-map (plist-get info :parse-tree) 'keyword
|
||
(lambda (k)
|
||
(equal "PRINT_BIBLIOGRAPHY" (org-element-property :key k)))
|
||
info t))))
|
||
|
||
(defun org-cite-csl--output-format (info)
|
||
"Return expected Citeproc's output format.
|
||
INFO is the export state, as a property list. The return value is a symbol
|
||
corresponding to one of the output formats supported by Citeproc: `html',
|
||
`latex', or `org'."
|
||
(let ((backend (plist-get info :back-end)))
|
||
(cond
|
||
((org-export-derived-backend-p backend 'html) 'html)
|
||
((org-export-derived-backend-p backend 'latex) 'latex)
|
||
(t 'org))))
|
||
|
||
(defun org-cite-csl--style-file (info)
|
||
"Return style file associated to current export process.
|
||
|
||
INFO is the export state, as a property list.
|
||
|
||
When file name is relative, expand it according to `org-cite-csl-styles-dir',
|
||
or raise an error if the variable is unset."
|
||
(pcase (org-cite-bibliography-style info)
|
||
('nil org-cite-csl--fallback-style-file)
|
||
((and (pred file-name-absolute-p) file) file)
|
||
((and (guard org-cite-csl-styles-dir) file)
|
||
(expand-file-name file org-cite-csl-styles-dir))
|
||
(other
|
||
(user-error "Cannot handle relative style file name" other))))
|
||
|
||
(defun org-cite-csl--itemgetter (bibliography)
|
||
"Return Citeproc's \"itemgetter\" function for BIBLIOGRAPHY files.
|
||
The function handles \".bib\", \".bibtex\" and \".json\" files."
|
||
(let ((cache (make-hash-table :test #'equal)))
|
||
(dolist (file bibliography)
|
||
(pcase (file-name-extension file)
|
||
("json"
|
||
(let ((json-array-type 'list)
|
||
(json-key-type 'symbol))
|
||
(dolist (item (json-read-file file))
|
||
(puthash (cdr (assq 'id item)) item cache))))
|
||
((and (or "bib" "bibtex") ext)
|
||
(with-temp-buffer
|
||
(insert-file-contents file)
|
||
(goto-char (point-min))
|
||
(bibtex-set-dialect (if (string= ext "bib") 'biblatex 'BibTeX) t)
|
||
(bibtex-map-entries
|
||
(lambda (key &rest _)
|
||
(puthash key
|
||
(citeproc-bt-entry-to-csl (bibtex-parse-entry))
|
||
cache)))))
|
||
(ext
|
||
(user-error "Unknown bibliography extension: %S" ext))))
|
||
(lambda (itemids)
|
||
(mapcar (lambda (id)
|
||
(cons id (gethash id cache)))
|
||
itemids))))
|
||
|
||
(defun org-cite-csl--locale-getter ()
|
||
"Return a locale getter.
|
||
The getter looks for locales in `org-cite-csl-locales-dir' directory. If it
|
||
cannot find them, it retrieves the default \"en_US\" from
|
||
`org-cite-csl--fallback-locales-dir'."
|
||
(lambda (loc)
|
||
(or (and org-cite-csl-locales-dir
|
||
(ignore-errors
|
||
(funcall (citeproc-locale-getter-from-dir org-cite-csl-locales-dir)
|
||
loc)))
|
||
(funcall (citeproc-locale-getter-from-dir
|
||
org-cite-csl--fallback-locales-dir)
|
||
loc))))
|
||
|
||
(defun org-cite-csl--processor (info)
|
||
"Return Citeproc processor reading items from current bibliography.
|
||
|
||
INFO is the export state, as a property list.
|
||
|
||
Newly created processor is stored as the value of the `:cite-citeproc-processor'
|
||
property in INFO."
|
||
(or (plist-get info :cite-citeproc-processor)
|
||
(let* ((bibliography (plist-get info :bibliography))
|
||
(locale (or (plist-get info :language) "en_US"))
|
||
(processor
|
||
(citeproc-create
|
||
(org-cite-csl--style-file info)
|
||
(org-cite-csl--itemgetter bibliography)
|
||
(org-cite-csl--locale-getter)
|
||
locale)))
|
||
(plist-put info :cite-citeproc-processor processor)
|
||
processor)))
|
||
|
||
(defun org-cite-csl--parse-reference (reference info)
|
||
"Return Citeproc's structure associated to citation REFERENCE.
|
||
|
||
INFO is the export state, as a property list.
|
||
|
||
The result is a association list. Keys are: `id', `suppress-author', `prefix',
|
||
`suffix', `location', `locator' and `label'."
|
||
(let (label location-start locator-start location locator prefix suffix)
|
||
;; Parse suffix. Insert it in a temporary buffer to find
|
||
;; different parts: pre-label, label, locator, location (label +
|
||
;; locator), and suffix.
|
||
(with-temp-buffer
|
||
(save-excursion
|
||
(insert (org-element-interpret-data
|
||
(org-element-property :suffix reference))))
|
||
(cond
|
||
((re-search-forward org-cite-csl--label-regexp nil t)
|
||
(setq location-start (match-beginning 0))
|
||
(setq label (cdr (assoc (match-string 1) org-cite-csl--label-alist)))
|
||
(setq locator-start (match-end 1)))
|
||
((re-search-forward (rx digit) nil t)
|
||
(setq location-start (match-beginning 0))
|
||
(setq label "page")
|
||
(setq locator-start location-start))
|
||
(t
|
||
(setq suffix (org-element-property :suffix reference))))
|
||
;; Find locator's end, and suffix, if any. To that effect, look
|
||
;; for the last comma or digit after label, whichever comes
|
||
;; last.
|
||
(unless suffix
|
||
(goto-char (point-max))
|
||
(let ((re (rx (or "," (group digit)))))
|
||
(when (re-search-backward re location-start t)
|
||
(goto-char (or (match-end 1) (match-beginning 0)))
|
||
(setq location (buffer-substring location-start (point)))
|
||
(setq locator (org-trim (buffer-substring locator-start (point))))
|
||
;; Skip comma in suffix.
|
||
(setq suffix
|
||
(org-cite-parse-objects
|
||
(buffer-substring (match-end 0) (point-max))
|
||
t)))))
|
||
(setq prefix
|
||
(org-cite-concat
|
||
(org-element-property :prefix reference)
|
||
(and location-start
|
||
(org-cite-parse-objects
|
||
(buffer-substring 1 location-start)
|
||
t)))))
|
||
;; Return value.
|
||
(let ((export
|
||
(lambda (data)
|
||
(org-string-nw-p
|
||
(org-trim
|
||
;; When Citeproc exports to Org syntax, avoid mix and
|
||
;; matching output formats by also generating Org
|
||
;; syntax for prefix and suffix.
|
||
(if (eq 'org (org-cite-csl--output-format info))
|
||
(org-element-interpret-data data)
|
||
(org-export-data data info)))))))
|
||
`((id . ,(org-element-property :key reference))
|
||
(prefix . ,(funcall export prefix))
|
||
(suffix . ,(funcall export suffix))
|
||
(locator . ,locator)
|
||
(label . ,label)
|
||
(location . ,location)
|
||
(suppress-author . ,(org-cite-csl--no-author-p reference info))))))
|
||
|
||
(defun org-cite-csl--create-structure (citation info)
|
||
"Create Citeproc structure for CITATION object.
|
||
INFO is the export state, as a property list."
|
||
(let* ((cites (mapcar (lambda (r)
|
||
(org-cite-csl--parse-reference r info))
|
||
(org-cite-get-references citation)))
|
||
(footnote (org-cite-inside-footnote-p citation)))
|
||
;; Global prefix is inserted in front of the prefix of the first
|
||
;; reference.
|
||
(let ((global-prefix (org-element-property :prefix citation)))
|
||
(when global-prefix
|
||
(let* ((first (car cites))
|
||
(prefix (org-element-property :prefix first)))
|
||
(org-element-put-property
|
||
first :prefix (org-cite-concat global-prefix prefix)))))
|
||
;; Global suffix is appended to the suffix of the last reference.
|
||
(let ((global-suffix (org-element-property :suffix citation)))
|
||
(when global-suffix
|
||
(let* ((last (org-last cites))
|
||
(suffix (org-element-property :suffix last)))
|
||
(org-element-put-property
|
||
last :suffix (org-cite-concat suffix global-suffix)))))
|
||
;; Check if CITATION needs wrapping, i.e., it should be wrapped in
|
||
;; a footnote, but isn't yet.
|
||
(when (and (not footnote) (org-cite-csl--note-style-p info))
|
||
(org-cite-adjust-note citation info)
|
||
(org-cite-wrap-citation citation info))
|
||
;; Return structure.
|
||
(citeproc-citation-create
|
||
:note-index (and footnote (org-export-get-footnote-number footnote info))
|
||
:cites cites
|
||
:capitalize-first (or footnote (org-cite-csl--capitalize-p citation info))
|
||
:suppress-affixes (org-cite-csl--no-affixes-p citation info))))
|
||
|
||
(defun org-cite-csl--rendered-citations (info)
|
||
"Return the rendered citations as an association list.
|
||
|
||
INFO is the export state, as a property list.
|
||
|
||
Return an alist (CITATION . OUTPUT) where CITATION object has been rendered as
|
||
OUTPUT using Citeproc."
|
||
(or (plist-get info :cite-citeproc-rendered-citations)
|
||
(let* ((citations (org-cite-list-citations info))
|
||
(processor (org-cite-csl--processor info))
|
||
(structures
|
||
(mapcar (lambda (c) (org-cite-csl--create-structure c info))
|
||
citations)))
|
||
(citeproc-append-citations structures processor)
|
||
(let* ((rendered
|
||
(citeproc-render-citations
|
||
processor
|
||
(org-cite-csl--output-format info)
|
||
(org-cite-csl--no-citelinks-p info)))
|
||
(result (seq-mapn #'cons citations rendered)))
|
||
(plist-put info :cite-citeproc-rendered-citations result)
|
||
result))))
|
||
|
||
|
||
;;; Export capability
|
||
(defun org-cite-csl-render-citation (citation _style _backend info)
|
||
"Export CITATION object.
|
||
INFO is the export state, as a property list."
|
||
(org-cite-csl--barf-without-citeproc)
|
||
(let ((output (cdr (assq citation (org-cite-csl--rendered-citations info)))))
|
||
(if (not (eq 'org (org-cite-csl--output-format info)))
|
||
output
|
||
;; Parse Org output to re-export it during the regular export
|
||
;; process.
|
||
(org-cite-parse-objects output))))
|
||
|
||
(defun org-cite-csl-render-bibliography (_keys _files _style _props _backend info)
|
||
"Export bibliography.
|
||
INFO is the export state, as a property list."
|
||
(org-cite-csl--barf-without-citeproc)
|
||
(pcase-let* ((format (org-cite-csl--output-format info))
|
||
(`(,output . ,parameters)
|
||
(citeproc-render-bib
|
||
(org-cite-csl--processor info)
|
||
format
|
||
(org-cite-csl--no-citelinks-p info))))
|
||
(pcase format
|
||
('html
|
||
(concat
|
||
(and (cdr (assq 'second-field-align parameters))
|
||
(let* ((max-offset (cdr (assq 'max-offset parameters)))
|
||
(char-width
|
||
(string-to-number org-cite-csl-html-label-width-per-char))
|
||
(char-width-unit
|
||
(progn
|
||
(string-match (number-to-string char-width)
|
||
org-cite-csl-html-label-width-per-char)
|
||
(substring org-cite-csl-html-label-width-per-char
|
||
(match-end 0)))))
|
||
(format
|
||
"<style>.csl-left-margin{float: left; padding-right: 0em;}
|
||
.csl-right-inline{margin: 0 0 0 %d%s;}</style>"
|
||
(* max-offset char-width)
|
||
char-width-unit)))
|
||
(and (cdr (assq 'hanging-indent parameters))
|
||
(format
|
||
"<style>.csl-entry{text-indent: -%s; margin-left: %s;}</style>"
|
||
org-cite-csl-html-hanging-indent
|
||
org-cite-csl-html-hanging-indent))
|
||
output))
|
||
('latex
|
||
(if (cdr (assq 'hanging-indent parameters))
|
||
(format "\\begin{hangparas}{%s}{1}\n%s\n\\end{hangparas}"
|
||
org-cite-csl-latex-hanging-indent
|
||
output)
|
||
output))
|
||
(_
|
||
;; Parse Org output to re-export it during the regular export
|
||
;; process.
|
||
(org-cite-parse-elements output)))))
|
||
|
||
(defun org-cite-csl-finalizer (output _keys _files _style _backend info)
|
||
"Add \"hanging\" package if missing from LaTeX output.
|
||
OUTPUT is the export document, as a string. INFO is the export state, as a
|
||
property list."
|
||
(org-cite-csl--barf-without-citeproc)
|
||
(if (not (eq 'latex (org-cite-csl--output-format info)))
|
||
output
|
||
(with-temp-buffer
|
||
(save-excursion (insert output))
|
||
(when (search-forward "\\begin{document}" nil t)
|
||
;; Ensure there is a \usepackage{hanging} somewhere or add one.
|
||
(goto-char (match-beginning 0))
|
||
(let ((re (rx "\\usepackage" (opt "[" (*? nonl) "]") "{hanging}")))
|
||
(unless (re-search-backward re nil t)
|
||
(insert "\\usepackage{hanging}\n"))))
|
||
(buffer-string))))
|
||
|
||
|
||
;;; Register `csl' processor
|
||
(org-cite-register-processor 'csl
|
||
:export-citation #'org-cite-csl-render-citation
|
||
:export-bibliography #'org-cite-csl-render-bibliography
|
||
:export-finalizer #'org-cite-csl-finalizer
|
||
:cite-styles
|
||
'((("noauthor" "na") ("bare" "b") ("bare-caps" "bc") ("caps" "c"))
|
||
(("nil") ("bare" "b") ("bare-caps" "bc") ("caps" "c"))))
|
||
|
||
(provide 'org-cite-csl)
|
||
(provide 'oc-csl)
|
||
;;; oc-citeproc.el ends here
|