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;;; author.scm -- Handling author names.
;;; -*- coding: iso-8859-1 -*-
;;;
;;; Copyright 2006, 2007, 2008, 2009, 2015, 2018 Ludovic Court�s <ludo@gnu.org>
;;;
;;;
;;; This file is part of Skribilo.
;;;
;;; Skribilo 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.
;;;
;;; Skribilo 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 Skribilo. If not, see <http://www.gnu.org/licenses/>.
(define-module (skribilo biblio author)
#:use-module (srfi srfi-13)
#:use-module (srfi srfi-14)
#:autoload (srfi srfi-34) (raise)
#:use-module (srfi srfi-35)
#:use-module (ice-9 match)
#:use-module (skribilo biblio abbrev)
#:autoload (skribilo ast) (markup-option markup-body markup-ident)
#:autoload (skribilo utils strings) (make-string-replace)
#:autoload (skribilo package base) (it)
#:use-module (skribilo utils syntax)
#:export (comma-separated->author-list
comma-separated->and-separated-authors
extract-first-author-name
abbreviate-author-first-names
abbreviate-author-first-names/family-first
abbreviate-first-names
first-author-last-name
short-author-names
bib-sort/first-author-last-name))
;;; Author: Ludovic Court�s
;;;
;;; Commentary:
;;;
;;; Heuristics to manipulate author names as strings.
;;;
;;; Code:
(define %no-comma
(char-set-complement (char-set #\,)))
(define (comma-separated->author-list authors)
;; Return a list of strings where each individual string is an author
;; name. AUTHORS is a string representing a list of author names separated
;; by a comma.
(string-tokenize authors %no-comma))
(define (comma-separated->and-separated-authors authors)
;; Take AUTHORS, a string containing comma-separated author names, and
;; return a string where author names are separated by " and " (suitable
;; for BibTeX).
(string-join (comma-separated->author-list authors)
" and "))
(define (extract-first-author-name names)
;; Extract the name of the first author from string
;; NAMES that is a comma-separated list of authors.
(let ((author-name-end (or (string-index names #\,)
(string-length names))))
(substring names 0 author-name-end)))
(define (abbreviate-author-first-names name)
;; Abbreviate author first names. If NAME is "Bob Smith", the result is
;; "B. Smith".
(let* ((components (string-split name #\space))
(component-number (length components)))
(string-concatenate
(append
(map (lambda (c)
(string-append (abbreviate-word c) " "))
(list-head components
(- component-number 1)))
(list-tail components (- component-number 1))))))
(define (abbreviate-author-first-names/family-first name)
;; Abbreviate author first names, but leave the family name first. If
;; NAME is "Bob Smith", the result is "Smith, B.".
(match (string-tokenize name)
((first-names ... last-name)
(string-append last-name ", "
(string-join (map abbreviate-word first-names)
" ")))))
(define* (abbreviate-first-names names
#:optional (abbreviate-author-names
abbreviate-author-first-names))
;; Abbreviate first names in NAMES. NAMES is supposed to be
;; something like "Ludovic Court�s, Marc-Olivier Killijian". The result
;; is something like "L. Court�s, M-O. Killijian".
(let loop ((names ((make-string-replace '((#\newline " ")
(#\tab " ")))
names))
(result ""))
(if (string=? names "")
result
(let* ((len (string-length names))
(first-author-names-end (or (string-index names #\,)
len))
(first-author-names (substring names 0
first-author-names-end))
(next (substring names
(min (+ 1 first-author-names-end) len)
len)))
(loop next
(string-append result
(if (string=? "" result) "" ", ")
(abbreviate-author-names
first-author-names)))))))
(define (first-author-last-name authors)
;; Return a string containing exactly the last name of the first author.
;; Author names in AUTHORS are assumed to be comma separated.
(let loop ((first-author (extract-first-author-name authors)))
(let ((space (string-index first-author #\space)))
(if (not space)
first-author
(loop (substring first-author (+ space 1)
(string-length first-author)))))))
(define (short-author-names authors)
;; Given AUTHORS (a string containing a comma-separated author list),
;; return author markup suitable for use as a bibliography identifier. For
;; instance, "Smith", "Smith & Johnson", "Smith et al.".
(let ((authors (comma-separated->author-list authors)))
(if (null? (cdr authors))
(first-author-last-name (car authors))
(if (null? (cddr authors))
(string-append (first-author-last-name (car authors))
" & "
(first-author-last-name (cadr authors)))
(list (first-author-last-name (car authors)) " "
(it " et al."))))))
(define (bib-sort/first-author-last-name entries)
;; May be passed as the `:sort' argument of `the-bibliography'.
(define (maybe-first-author-last-name author)
(cond ((string? author)
(first-author-last-name author))
(else
;; AUTHOR cannot be abbreviated, maybe because it is enclosed in a
;; `noabbrev' markup (e.g., because it's not a person name).
(string-trim (ast->string author)))))
(define (entry-field entry name)
(let ((o (markup-option entry name)))
(and o (markup-body o))))
(define (<=? e1 e2 field fail)
(let ((f1 (entry-field e1 field))
(f2 (entry-field e2 field)))
(cond ((and (string? f1) (string? f2))
(if (string-ci=? f1 f2)
(fail)
(string-ci<=? f1 f2)))
((and (number? f1) (number? f2))
(if (= f1 f2)
(fail)
(<= f1 f2)))
(else
(fail)))))
(let ((check-author (lambda (e)
(if (not (markup-option e 'author))
(let ((msg (G_ "no author for this bib entry")))
(raise (condition
(&message
(message (string-append
"bib-sort/first-author-last-name: "
(markup-ident e) ": "
msg))))))
#t))))
(sort entries
(lambda (e1 e2)
(and (check-author e1)
(check-author e2)
(let ((a1 (maybe-first-author-last-name
(markup-body (markup-option e1 'author))))
(a2 (maybe-first-author-last-name
(markup-body (markup-option e2 'author)))))
(if (string-ci=? a1 a2)
(<=? e1 e2 'year
(lambda ()
(<=? e1 e2 'title
(lambda ()
#f))))
(string-ci<=? a1 a2))))))))
;;; arch-tag: c9a1ef10-a2cd-4a06-bd35-fbdee1abf09a
;;; author.scm ends here
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