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punctuation.scm
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;;; Punctuation modes
;; Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Brailcom, o.p.s.
;; Author: Milan Zamazal <[email protected]>
;; COPYRIGHT NOTICE
;; 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 2 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, write to the Free Software
;; Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
(require 'oo)
(require 'word-mapping)
(defvar punctuation-mode 'default)
(defvar punctuation-chars "[- !\"#$%&'()*+,./\\\\^_`:;<=>?@{|}~]")
(defvar punctuation-chars-2 "[][]")
(defvar punctuation-punc-languages '(english britishenglish americanenglish))
(defvar punctuation-punc-language-handlers '((french . franfest_token_punctuation)))
(defvar punctuation-punc-language-splitters '((french . franfest_token_punctuation_split)))
;; Default English voice doesn't have defined pronunciation of punctuation
;; characters
(defvar punctuation-pronunciation
'(("." "dot")
("," "comma")
(";" "semicolon")
(":" "colon")
("!" "exclamation" "mark")
("?" "question" "mark")
("-" "dash")
("'" "right" "quote")
("`" "left" "quote")
("\"" "double" "quote")
("(" "left" "parenthesis")
(")" "right" "parenthesis")
("{" "left" "brace")
("}" "right" "brace")))
(define (punctuation-character string)
(or (string-matches string punctuation-chars)
(string-matches string punctuation-chars-2)))
(define (punctuation-split-token token name ttw)
;; We must be careful not to discard whole token here. It may contain
;; annotations such as index marks and they would be discarded together with
;; the token.
(let ((words (punctuation-split-token* token name ttw)))
(or words
(ttw token (if (eq punctuation-mode 'all) "" " ")))))
(define (punctuation-split-token* token name ttw)
(cond
;; No punctuation
((and (not (string-matches name
(string-append ".*" punctuation-chars ".*")))
(not (string-matches name
(string-append ".*" punctuation-chars-2 ".*"))))
(ttw token name))
;; Punctuation at start
((punctuation-character (substring name 0 1))
(append (if (eq? punctuation-mode 'all)
(ttw token (substring name 0 1)))
(punctuation-split-token token
(substring name 1 (- (length name) 1))
ttw)))
;; Punctuation inside
(t
(let ((i 1))
(while (not (punctuation-character (substring name i 1)))
(set! i (+ i 1)))
(append (ttw token (substring name 0 i))
(punctuation-split-token
token (substring name i (- (length name) i)) ttw))))))
(define-wrapper (token_to_words token name) punctuation
(if (eq? punctuation-mode 'default)
((next-func) token name)
(if (assoc (intern (Param.get 'Language))
punctuation-punc-language-splitters)
(apply (cdr (assoc (intern (Param.get 'Language))
punctuation-punc-language-splitters))
(list token name (next-func)))
(punctuation-split-token token name (next-func)))))
(define (punctuation-process-words utt)
(cond
((eq? punctuation-mode 'all)
(cond
((member (intern (Param.get 'Language)) punctuation-punc-languages)
;; Standard English lexicon has no notion of punctuation pronounciation
(do-relation-items (w utt Word)
(let ((trans (assoc (item.name w) punctuation-pronunciation)))
(if (and trans
(not (word-mapping-of w)))
(begin
(item.set_name w (car (cdr trans)))
(set! trans (cdr (cdr trans)))
(while trans
(let ((i (item.insert w (list (car trans)))))
(item.append_daughter (item.parent (item.relation w 'Token))
i))
(set! trans (cdr trans))))))))
(t
;; We assume other languages don't insert punctuation words themselves
(do-relation-items (w utt Word)
(let* ((w* (item.relation w 'Token))
(token (item.parent w*)))
(when (and (not (item.prev w*))
(item.has_feat token 'prepunctuation))
(dolist (p (reverse (symbolexplode (item.feat token 'prepunctuation))))
(let ((i (item.insert w `(,p ((name ,p))) 'before)))
(item.prepend_daughter token i))))
(when (and (not (item.next w*))
(item.has_feat token 'punc))
(dolist (p (reverse (symbolexplode (item.feat token 'punc))))
(let ((i (item.insert w `(,p ((name ,p))))))
(item.append_daughter token i)))))))))
;; Delete punctuation when punctuation-mode is none
;; (We actually don't delete the words as this might discard annotations
;; such as index marks. So we just make the word names empty.)
((eq punctuation-mode 'none)
(do-relation-top-items (token utt Token)
(if (punctuation-character (item.name token))
(dolist (w (mapcar (lambda (i) (item.relation i 'Word))
(item.daughters token)))
(if w
(item.set_feat w 'name "")))))
(do-relation-top-items (w utt Word)
(if (punctuation-character (item.name w))
(item.set_feat w 'name "")))))
utt)
(Param.wrap Token_Method punctuation
(lambda (utt)
(apply* (next-value) (list utt))
(if (assoc (intern (Param.get 'Language))
punctuation-punc-language-handlers)
(apply (cdr (assoc (intern (Param.get 'Language))
punctuation-punc-language-handlers))
(list utt))
(punctuation-process-words utt))))
(Param.wrap Word_Method punctuation
;; This is here to avoid deletion of punctuation in standard functions
(lambda (utt)
(if (eq? punctuation-mode 'all)
(do-relation-items (w utt Word)
(if (string-matches (item.feat w 'pos) "f?punc")
(item.set_feat w 'pos 'allpunc))))
(apply* (next-value) (list utt))))
(define (set-punctuation-mode mode)
(or (member mode '(default all none))
(error "Unknown punctuation mode" mode))
(oo-ensure-function-wrapped 'token_to_words)
(set! punctuation-mode mode))
(provide 'punctuation)