code.delx.au - gnu-emacs-elpa/blob - chess-sound.el

   1 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
   2 ;;
   3 ;; This is very similar to chess-announce, except it uses specific
   4 ;; .WAV files instead of text-to-speech.
   5 ;;
   6 ;; $Revision$
   7
   8 (require 'chess-game)
   9
  10 (defgroup chess-sound nil
  11   "Code to play specific sounds when announcing chess moves."
  12   :group 'chess)
  13
  14 (defcustom chess-sound-directory
  15   (expand-file-name "sounds"
  16                     (file-name-directory
  17                      (or load-file-name buffer-file-name)))
  18   "The directory where chess sounds can be found."
  19   :type 'directory
  20   :group 'chess-sound)
  21
  22 (defcustom chess-sound-play-function (if (fboundp 'play-sound-file)
  23                                          'play-sound-file
  24                                        'chess-sound-play)
  25   "Non-nil if chess-sound should play sounds ."
  26   :type 'file
  27   :group 'chess-sound)
  28
  29 (defcustom chess-sound-program (or (executable-find "esdplay")
  30                                    (executable-find "play"))
  31   "Program used to play sounds, if `play-sound-file' does not exist."
  32   :type 'file
  33   :group 'chess-sound)
  34
  35 (defcustom chess-sound-args nil
  36   "Additional args to pass to `chess-sound-program', before the .WAV file."
  37   :type '(repeat string)
  38   :group 'chess-sound)
  39
  40 (defun chess-sound-for-game (game)
  41   "Announce the opponent's moves in GAME."
  42   (if (and (file-directory-p chess-sound-directory)
  43            (file-exists-p (expand-file-name "tap.wav"
  44                                             chess-sound-directory)))
  45   (chess-game-add-hook game 'chess-sound-event-handler)))
  46
  47 (defun chess-sound (ch)
  48   (let ((file
  49          (cond
  50           ((stringp ch)
  51            (format "%s.wav" ch))
  52           ((memq ch '(?\# ?\+ ?k ?q ?b ?n ?r ?p ?x))
  53            (format "%c_.wav" ch))
  54           (t
  55            (format "%s.wav" (chess-index-to-coord ch))))))
  56     (funcall chess-sound-play-function
  57              (expand-file-name file chess-sound-directory))))
  58
  59 (defun chess-sound-play (file)
  60   (apply 'call-process chess-sound-program
  61          nil nil nil chess-sound-args))
  62
  63 (defun chess-sound-event-handler (game ignore event &rest args)
  64   "This display module presents a standard chessboard.
  65 See `chess-display-type' for the different kinds of displays."
  66   (cond
  67    ((memq event '(move game-over))
  68     (let* ((ply (chess-game-ply game (1- (chess-game-index game))))
  69            (pos (chess-ply-pos ply)))
  70       (if (eq (chess-game-data game 'my-color)
  71               (chess-pos-side-to-move pos))
  72           (chess-sound "tap")
  73         (let* ((source (chess-ply-source ply))
  74                (target (chess-ply-target ply))
  75                (s-piece (chess-pos-piece pos source))
  76                (t-piece (chess-pos-piece pos target))
  77                text)
  78           (cond
  79            ((memq :castle changes)
  80             (chess-sound "O-O"))
  81            ((memq :long-castle changes)
  82             (chess-sound "O-O-O"))
  83            ((= t-piece ? )
  84             (chess-sound (downcase s-piece))
  85             (chess-sound target))
  86            (t
  87             (chess-sound (downcase s-piece))
  88             (chess-sound ?x)
  89             (chess-sound (downcase t-piece))
  90             (chess-sound target)))
  91           (if (memq :check changes)
  92               (chess-sound ?+))
  93           (if (memq :checkmate changes)
  94               (chess-sound ?#))
  95           (if (memq :stalemate changes)
  96               (chess-sound "smate")))))
  97     nil)))
  98
  99 (provide 'chess-sound)
 100
 101 ;;; chess-sound.el ends here