/usr/share/emacs/site-lisp/speechd-el/speechd-out.el is in speechd-el 2.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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;; Copyright (C) 2004, 2005, 2006, 2008 Brailcom, o.p.s.
;; Author: Milan Zamazal <pdm@brailcom.org>
;; 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 3 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, see <http://www.gnu.org/licenses/>.
;;; Code:
(eval-when-compile (require 'cl))
(require 'eieio)
(require 'speechd-common)
(defvar speechd-out--drivers '())
(defcustom speechd-out-active-drivers '(ssip brltty)
"List of names of the drivers to send output to."
:type '(repeat symbol)
:group 'speechd-el)
(defvar speechd-out--event-mapping
'((empty . empty-text)
(whitespace . whitespace)
(beginning-of-line . beginning-of-line)
(end-of-line . end-of-line)
(start . start)
(finish . finish)
(minibuffer . prompt)
(message . message)))
;;; Internal infrastructure
(defmacro speechd-out--loop-drivers (var &rest body)
(let ((var* (car var))
($speechd-out-errors (gensym))
($error (gensym))
($error-data (gensym))
($err (gensym)))
`(let ((,$speechd-out-errors '()))
(dolist (,var* speechd-out--drivers)
(when (memq (speechd-driver.name ,var*) speechd-out-active-drivers)
(condition-case ,$err (progn ,@body)
(error
(push ,$err ,$speechd-out-errors)))))
(when ,$speechd-out-errors
;; How to signal all the errors?
(destructuring-bind
(,$error . ,$error-data) (first ,$speechd-out-errors)
(setq ,$speechd-out-errors (cdr ,$speechd-out-errors))
(while (and ,$speechd-out-errors
(eq (caar ,$speechd-out-errors) ,$error))
(setq ,$error-data (append ,$error-data
(cdar ,$speechd-out-errors)))
(setq ,$speechd-out-errors (cdr ,$speechd-out-errors)))
(signal ,$error ,$error-data))))))
(defun speechd-out--loop-drivers-op (operation &rest args)
(speechd-out--loop-drivers (driver)
(apply operation driver args)))
(defun speechd-out--icon-name (icon)
(let ((mapping (cdr (assq icon speechd-out--event-mapping))))
(when mapping
(symbol-name mapping))))
;;; Driver API
(defclass speechd-driver ()
((name :initarg :name
:reader speechd-driver.name)))
(defmethod initialize-instance :after
((this speechd-driver) slots)
(if (not (slot-boundp this 'name))
(error "Driver name not given")))
(defun speechd-out-register-driver (driver)
(let ((class (class-of driver)))
(labels ((replace (list)
(cond
((null list)
(list driver))
((eq (class-of (car list)) class)
(cons driver (cdr list)))
(t
(cons (car list) (replace (cdr list)))))))
(setq speechd-out--drivers (replace speechd-out--drivers)))))
(defmethod speechd.cancel ((driver speechd-driver) all))
(defmethod speechd.stop ((driver speechd-driver) all))
(defmethod speechd.pause ((driver speechd-driver) all))
(defmethod speechd.resume ((driver speechd-driver) all))
(defmethod speechd.repeat ((driver speechd-driver)))
(defmethod speechd.block ((driver speechd-driver) function))
(defmethod speechd.text ((driver speechd-driver) text cursor))
(defmethod speechd.icon ((driver speechd-driver) icon))
(defmethod speechd.char ((driver speechd-driver) char))
(defmethod speechd.key ((driver speechd-driver) key))
(defmethod speechd.set ((driver speechd-driver) parameter value))
(defmethod speechd.shutdown ((driver speechd-driver)))
(defvar speechd.update nil)
;;; Interface functions and variables
(defstruct speechd-out-update
text
cursor
group)
(defmacro speechd-out-with-updated-text (spec &rest body)
`(let ((speechd.update ,spec))
,@body))
(defun speechd-out-cancel (&optional all)
(interactive "P")
(speechd-out--loop-drivers-op #'speechd.cancel all))
(defun speechd-out-stop (&optional all)
(interactive "P")
(speechd-out--loop-drivers-op #'speechd.stop all))
(defun speechd-out-pause (&optional all)
(interactive "P")
(speechd-out--loop-drivers-op #'speechd.pause all))
(defun speechd-out-resume (&optional all)
(interactive "P")
(speechd-out--loop-drivers-op #'speechd.resume all))
(defun speechd-out-repeat ()
(interactive)
(speechd-out--loop-drivers-op #'speechd.repeat))
(defun* speechd-out-icon (icon &key (priority speechd-default-sound-priority))
(let ((icon-name (speechd-out--icon-name icon)))
(when icon-name
(speechd-out--loop-drivers (driver)
(speechd.set driver 'priority priority)
(speechd.icon driver icon-name)))))
(defun* speechd-out-char (char &key (priority speechd-default-char-priority)
icon)
(let ((icon-name (speechd-out--icon-name icon)))
(speechd-out--loop-drivers (driver)
(speechd.set driver 'priority priority)
(lexical-let ((icon-name% icon-name)
(driver% driver)
(char% char))
(speechd.block driver (lambda ()
(when icon-name%
(speechd.icon driver% icon-name%))
(speechd.char driver% char%)))))))
(defun* speechd-out-keys (keys &key (priority speechd-default-key-priority)
text)
(speechd-out--loop-drivers (driver)
(speechd.set driver 'priority priority)
(lexical-let ((driver% driver)
(keys% keys)
(text% text))
(speechd.block driver (lambda ()
(dolist (k keys%)
(speechd.key driver% k))
(when text%
(speechd.text driver% text% nil)))))))
(defun* speechd-out-text (text &key (priority speechd-default-text-priority)
icon cursor)
(let ((icon-name (speechd-out--icon-name icon)))
(speechd-out--loop-drivers (driver)
(speechd.set driver 'priority priority)
(lexical-let ((icon-name% icon-name)
(driver% driver)
(text% text)
(cursor% cursor))
(speechd.block driver (lambda ()
(when icon-name%
(speechd.icon driver% icon-name%))
(speechd.text driver% text% cursor%)))))))
(defun speechd-out-set (parameter value)
(speechd-out--loop-drivers (driver)
(speechd.set driver parameter value)))
(defun speechd-out-shutdown (&optional inactive-only)
(dolist (driver speechd-out--drivers)
(when (or (not inactive-only)
(not (memq (speechd-driver.name driver)
speechd-out-active-drivers)))
(speechd.shutdown driver))))
(defun speechd-out-enable-driver (driver)
"Enable given driver."
(interactive
(list (intern
(completing-read "Enable driver: "
(mapcar 'list
(mapcar 'symbol-name
(set-difference
(mapcar 'speechd-driver.name
speechd-out--drivers)
speechd-out-active-drivers)))
nil t))))
(unless (memq driver speechd-out-active-drivers)
(push driver speechd-out-active-drivers)))
(defun speechd-out-disable-driver (driver)
"Disable given driver and disconnect from its output device."
(interactive
(list (intern
(completing-read "Disable driver: "
(mapcar 'list
(mapcar 'symbol-name
speechd-out-active-drivers))
nil t))))
(setq speechd-out-active-drivers (remove driver speechd-out-active-drivers))
(speechd-out-shutdown t))
;;; Announce
(provide 'speechd-out)
;;; speechd-out.el ends here
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