lisp/gnus/earcon.el

   1 ;;; earcon.el --- sound effects for messages
   2
   3 ;; Copyright (C) 1996, 2000, 2001 Free Software Foundation
   4
   5 ;; Author: Steven L. Baur <steve@miranova.com>
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software; you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation; either version 2, or (at your option)
  12 ;; any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22 ;; Boston, MA 02111-1307, USA.
  23 ;; This file is part of GNU Emacs.
  24
  25 ;;; Commentary:
  26
  27 ;; This file provides access to sound effects in Gnus.
  28
  29 ;;; Code:
  30
  31 (eval-when-compile (require 'cl))
  32 (require 'gnus)
  33 (require 'gnus-audio)
  34 (require 'gnus-art)
  35
  36 (defgroup earcon nil
  37   "Turn ** sounds ** into noise."
  38   :group 'gnus-visual)
  39
  40 (defcustom earcon-prefix "**"
  41   "*String denoting the start of an earcon."
  42   :type 'string
  43   :group 'earcon)
  44
  45 (defcustom earcon-suffix "**"
  46   "String denoting the end of an earcon."
  47   :type 'string
  48   :group 'earcon)
  49
  50 (defcustom earcon-regexp-alist
  51   '(("boring" 1 "Boring.au")
  52     ("evil[ \t]+laugh" 1 "Evil_Laugh.au")
  53     ("gag\\|puke" 1 "Puke.au")
  54     ("snicker" 1 "Snicker.au")
  55     ("meow" 1 "catmeow.au")
  56     ("sob\\|boohoo" 1 "cry.wav")
  57     ("drum[ \t]*roll" 1 "drumroll.au")
  58     ("blast" 1 "explosion.au")
  59     ("flush\\|plonk!*" 1 "flush.au")
  60     ("kiss" 1 "kiss.wav")
  61     ("tee[ \t]*hee" 1 "laugh.au")
  62     ("shoot" 1 "shotgun.wav")
  63     ("yawn" 1 "snore.wav")
  64     ("cackle" 1 "witch.au")
  65     ("yell\\|roar" 1 "yell2.au")
  66     ("whoop-de-doo" 1 "whistle.au"))
  67   "*A list of regexps to map earcons to real sounds."
  68   :type '(repeat (list regexp
  69                        (integer :tag "Match")
  70                        (string :tag "Sound")))
  71   :group 'earcon)
  72 (defvar earcon-button-marker-list nil)
  73 (make-variable-buffer-local 'earcon-button-marker-list)
  74
  75 ;;; FIXME!! clone of code from gnus-vis.el FIXME!!
  76 (defun earcon-article-push-button (event)
  77   "Check text under the mouse pointer for a callback function.
  78 If the text under the mouse pointer has a `earcon-callback' property,
  79 call it with the value of the `earcon-data' text property."
  80   (interactive "e")
  81   (set-buffer (window-buffer (posn-window (event-start event))))
  82   (let* ((pos (posn-point (event-start event)))
  83          (data (get-text-property pos 'earcon-data))
  84          (fun (get-text-property pos 'earcon-callback)))
  85     (if fun (funcall fun data))))
  86
  87 (defun earcon-article-press-button ()
  88   "Check text at point for a callback function.
  89 If the text at point has a `earcon-callback' property,
  90 call it with the value of the `earcon-data' text property."
  91   (interactive)
  92   (let* ((data (get-text-property (point) 'earcon-data))
  93          (fun (get-text-property (point) 'earcon-callback)))
  94     (if fun (funcall fun data))))
  95
  96 (defun earcon-article-prev-button (n)
  97   "Move point to N buttons backward.
  98 If N is negative, move forward instead."
  99   (interactive "p")
 100   (earcon-article-next-button (- n)))
 101
 102 (defun earcon-article-next-button (n)
 103   "Move point to N buttons forward.
 104 If N is negative, move backward instead."
 105   (interactive "p")
 106   (let ((function (if (< n 0) 'previous-single-property-change
 107                     'next-single-property-change))
 108         (inhibit-point-motion-hooks t)
 109         (backward (< n 0))
 110         (limit (if (< n 0) (point-min) (point-max))))
 111     (setq n (abs n))
 112     (while (and (not (= limit (point)))
 113                 (> n 0))
 114       ;; Skip past the current button.
 115       (when (get-text-property (point) 'earcon-callback)
 116         (goto-char (funcall function (point) 'earcon-callback nil limit)))
 117       ;; Go to the next (or previous) button.
 118       (gnus-goto-char (funcall function (point) 'earcon-callback nil limit))
 119       ;; Put point at the start of the button.
 120       (when (and backward (not (get-text-property (point) 'earcon-callback)))
 121         (goto-char (funcall function (point) 'earcon-callback nil limit)))
 122       ;; Skip past intangible buttons.
 123       (when (get-text-property (point) 'intangible)
 124         (incf n))
 125       (decf n))
 126     (unless (zerop n)
 127       (gnus-message 5 "No more buttons"))
 128     n))
 129
 130 (defun earcon-article-add-button (from to fun &optional data)
 131   "Create a button between FROM and TO with callback FUN and data DATA."
 132   (and (boundp gnus-article-button-face)
 133        gnus-article-button-face
 134        (gnus-overlay-put (gnus-make-overlay from to)
 135                          'face gnus-article-button-face))
 136   (gnus-add-text-properties
 137    from to
 138    (nconc (and gnus-article-mouse-face
 139                (list gnus-mouse-face-prop gnus-article-mouse-face))
 140           (list 'gnus-callback fun)
 141           (and data (list 'gnus-data data)))))
 142
 143 (defun earcon-button-entry ()
 144   ;; Return the first entry in `gnus-button-alist' matching this place.
 145   (let ((alist earcon-regexp-alist)
 146         (case-fold-search t)
 147         (entry nil))
 148     (while alist
 149       (setq entry (pop alist))
 150       (if (looking-at (car entry))
 151           (setq alist nil)
 152         (setq entry nil)))
 153     entry))
 154
 155 (defun earcon-button-push (marker)
 156   ;; Push button starting at MARKER.
 157   (save-excursion
 158     (set-buffer gnus-article-buffer)
 159     (goto-char marker)
 160     (let* ((entry (earcon-button-entry))
 161            (inhibit-point-motion-hooks t)
 162            (fun 'gnus-audio-play)
 163            (args (list (nth 2 entry))))
 164       (cond
 165        ((fboundp fun)
 166         (apply fun args))
 167        ((and (boundp fun)
 168              (fboundp (symbol-value fun)))
 169         (apply (symbol-value fun) args))
 170        (t
 171         (gnus-message 1 "You must define `%S' to use this button"
 172                       (cons fun args)))))))
 173
 174 ;;; FIXME!! clone of code from gnus-vis.el FIXME!!
 175
 176 ;;;###interactive
 177 (defun earcon-region (beg end)
 178   "Play Sounds in the region between point and mark."
 179   (interactive "r")
 180   (earcon-buffer (current-buffer) beg end))
 181
 182 ;;;###interactive
 183 (defun earcon-buffer (&optional buffer st nd)
 184   (interactive)
 185   (save-excursion
 186     ;; clear old markers.
 187     (if (boundp 'earcon-button-marker-list)
 188         (while earcon-button-marker-list
 189           (set-marker (pop earcon-button-marker-list) nil))
 190       (setq earcon-button-marker-list nil))
 191     (and buffer (set-buffer buffer))
 192     (let ((buffer-read-only nil)
 193           (inhibit-point-motion-hooks t)
 194           (case-fold-search t)
 195           (alist earcon-regexp-alist)
 196           beg entry regexp)
 197       (goto-char (point-min))
 198       (setq beg (point))
 199       (while (setq entry (pop alist))
 200         (setq regexp (concat (regexp-quote earcon-prefix)
 201                              ".*\\("
 202                              (car entry)
 203                              "\\).*"
 204                              (regexp-quote earcon-suffix)))
 205         (goto-char beg)
 206         (while (re-search-forward regexp nil t)
 207           (let* ((start (and entry (match-beginning 1)))
 208                  (end (and entry (match-end 1)))
 209                  (from (match-beginning 1)))
 210             (earcon-article-add-button
 211              start end 'earcon-button-push
 212              (car (push (set-marker (make-marker) from)
 213                         earcon-button-marker-list)))
 214             (gnus-audio-play (caddr entry))))))))
 215
 216 ;;;###autoload
 217 (defun gnus-earcon-display ()
 218   "Play sounds in message buffers."
 219   (interactive)
 220   (save-excursion
 221     (set-buffer gnus-article-buffer)
 222     (goto-char (point-min))
 223     ;; Skip headers
 224     (unless (search-forward "\n\n" nil t)
 225       (goto-char (point-max)))
 226     (sit-for 0)
 227     (earcon-buffer (current-buffer) (point))))
 228
 229 ;;;***
 230
 231 (provide 'earcon)
 232
 233 (run-hooks 'earcon-load-hook)
 234
 235 ;;; arch-tag: 844dfeea-980c-4ed0-907f-a30bf139691c
 236 ;;; earcon.el ends here