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;;; chess-message.el --- Code shared by all chess displays -*- lexical-binding: t; -*-
;; Copyright (C) 2014 Free Software Foundation, Inc.
;; This 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, or (at your option) any later
;; version.
;;
;; This 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(defgroup chess-message nil
"Support for message catalogs in chess.el."
:group 'chess)
(defcustom chess-message-language 'english
"The language to use when reporting messages."
:type 'symbol
:group 'chess-message)
;;; Code:
(defvar chess-message-catalog nil)
(defun chess-message-catalog (catalog definitions)
(let ((entry (assq catalog chess-message-catalog)))
(if entry
(dolist (def definitions)
(let ((str (assq (car def) (cdr entry))))
(if str
(setcdr str (cdr def))
(setcdr entry (cons def (cdr entry))))))
(push (cons catalog definitions) chess-message-catalog))))
(defun chess-string (key &rest arguments)
(let* ((entry (assq chess-message-language chess-message-catalog))
(msg (and entry (cdr (assq key (cdr entry))))))
(if msg
(apply 'format msg arguments)
(format "Message not found: %s" key))))
(defsubst chess-message (key &rest arguments)
(message (apply 'chess-string key arguments)))
(defsubst chess-error (key &rest arguments)
(error (apply 'chess-string key arguments)))
(put 'chess-message-catalog 'lisp-indent-function 1)
(provide 'chess-message)
;;; chess-message.el ends here
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