;;; emacspeak-eshell.el --- Speech-enable EShell - Emacs Shell  -*- lexical-binding: t; -*-
;;; $Id$
;;; $Author: tv.raman.tv $
;;; Description:   Speech-enable EShell
;;; Keywords: Emacspeak, Audio Desktop
;;{{{  LCD Archive entry:

;;; LCD Archive Entry:
;;; emacspeak| T. V. Raman |tv.raman.tv@gmail.com
;;; A speech interface to Emacs |
;;; $Date: 2007-09-01 15:30:13 -0700 (Sat, 01 Sep 2007) $ |
;;;  $Revision: 4532 $ |
;;; Location undetermined
;;;

;;}}}
;;{{{  Copyright:

;;; Copyright (C) 1995 -- 2018, T. V. Raman<tv.raman.tv@gmail.com>
;;; All Rights Reserved.
;;;
;;; This file is not part of GNU Emacs, but the same permissions apply.
;;;
;;; GNU Emacs 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, or (at your option)
;;; any later version.
;;;
;;; GNU Emacs 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; see the file COPYING.  If not, write to
;;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

;;}}}
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;{{{  Introduction:

;;; Commentary:
;;; EShell is a shell implemented entirely in Emacs Lisp.
;;; It is part of emacs 21 --and can also be used under
;;; Emacs 20.
;;; This module speech-enables EShell
;;; Code:

;;}}}
;;{{{ required modules

(cl-declaim  (optimize  (safety 0) (speed 3)))
(require 'emacspeak-preamble)
(require 'esh-arg)

;;}}}
;;{{{  setup various EShell hooks

;;; Play an auditory icon as you display the prompt
(defun emacspeak-eshell-prompt-function ()
  "Play auditory icon for prompt."
  (cl-declare (special eshell-last-command-status))
  (cond
   ((= 0 eshell-last-command-status)
    (emacspeak-auditory-icon 'item))
   (t (emacspeak-auditory-icon 'warn-user))))

(add-hook 'eshell-after-prompt-hook 'emacspeak-eshell-prompt-function)

;;; Speak command output

(defun emacspeak-eshell-speak-output  ()
  "Speak eshell output."
  (cl-declare (special eshell-last-input-end eshell-last-output-end
                       eshell-last-output-start))
  (emacspeak-speak-region eshell-last-input-end eshell-last-output-end))

(add-hook 
 'eshell-output-filter-functions
 'emacspeak-eshell-speak-output
 'at-end)

;;}}}
;;{{{  Advice top-level EShell

(defadvice eshell (after emacspeak pre act)
  "Announce switching to shell mode.
Provide an auditory icon if possible."
  (when (ems-interactive-p)
    (emacspeak-auditory-icon 'open-object)
    (dtk-set-punctuations 'all)
    (or dtk-split-caps
        (dtk-toggle-split-caps))
    (emacspeak-pronounce-refresh-pronunciations)
    (emacspeak-speak-line)))

;;}}}
;;{{{ advice em-hist

(cl-loop for f in
         '(
           eshell-next-input eshell-previous-input
           eshell-next-matching-input eshell-previous-matching-input
           eshell-next-matching-input-from-input eshell-previous-matching-input-from-input)
         do
         (eval
          `(defadvice ,f (after  emacspeak pre act comp)
             "Speak selected command."
             (when (ems-interactive-p)
               (emacspeak-auditory-icon 'select-object)
               (save-excursion
                 (beginning-of-line)
                 (eshell-skip-prompt)
                 (emacspeak-speak-line 1))))))

;;}}}
;;{{{  advice em-ls

(defgroup emacspeak-eshell nil
  "EShell on the Emacspeak Audio Desktop."
  :group 'emacspeak
  :group 'eshell
  :prefix "emacspeak-eshell-")

(defvar emacspeak-eshell-ls-use-personalities t
  "Indicates if ls in eshell uses different voice
personalities.")

;;}}}
;;{{{ voices

(voice-setup-add-map
 '(
   (eshell-ls-archive voice-lighten-extra)
   (eshell-ls-archive-face voice-lighten-extra)
   (eshell-ls-backup voice-monotone-medium)
   (eshell-ls-backup-face voice-monotone-medium)
   (eshell-ls-clutter voice-smoothen-extra)
   (eshell-ls-clutter-face voice-smoothen-extra)
   (eshell-ls-directory voice-bolden)
   (eshell-ls-directory-face voice-bolden)
   (eshell-ls-executable voice-animate-extra)
   (eshell-ls-executable-face voice-animate-extra)
   (eshell-ls-missing voice-brighten)
   (eshell-ls-missing-face voice-brighten)
   (eshell-ls-product voice-lighten-medium)
   (eshell-ls-product-face voice-lighten-medium)
   (eshell-ls-readonly voice-monotone)
   (eshell-ls-readonly-face voice-monotone)
   (eshell-ls-special voice-lighten-extra)
   (eshell-ls-special-face voice-lighten-extra)
   (eshell-ls-symlink voice-smoothen)
   (eshell-ls-symlink-face voice-smoothen)
   (eshell-ls-unreadable voice-monotone-medium)
   (eshell-ls-unreadable-face voice-monotone-medium)
   (eshell-prompt voice-animate)
   (eshell-prompt-face voice-animate)
   ))

;;}}}
;;{{{ Advice em-prompt

(cl-loop for f in
         '(
           eshell-next-prompt eshell-previous-prompt
           eshell-forward-matching-input  eshell-backward-matching-input)
         do
         (eval
          `(defadvice ,f (after  emacspeak pre act comp)
             "Speak selected command."
             (when (ems-interactive-p)
               (let ((emacspeak-speak-messages nil))
                 (emacspeak-auditory-icon 'select-object)
                 (emacspeak-speak-line 1))))))

;;}}}
;;{{{  advice esh-arg

(cl-loop for f in
         '(
           eshell-insert-buffer-name
           eshell-insert-process
           eshell-insert-envvar)
         do
         (eval
          `(defadvice ,f (after emacspeak pre act comp)
             "Speak output."
             (when (ems-interactive-p)
               (emacspeak-auditory-icon 'select-object)
               (emacspeak-speak-line)))))

(defadvice eshell-insert-process (after emacspeak pre
                                        act comp)
  "Speak output."
  (when (ems-interactive-p)
    (emacspeak-auditory-icon 'select-object)
    (emacspeak-speak-line)))

;;}}}
;;{{{ advice esh-mode

(defadvice eshell-delchar-or-maybe-eof (around emacspeak pre act)
  "Speak character you're deleting."
  (cond
   ((ems-interactive-p)
    (cond
     ((= (point) (point-max))
      (message "Sending EOF to comint process"))
     (t (dtk-tone 500 100 'force)
        (emacspeak-speak-char t)))
    ad-do-it)
   (t ad-do-it))
  ad-return-value)

(defadvice eshell-delete-backward-char (around emacspeak pre act)
  "Speak character you're deleting."
  (cond
   ((ems-interactive-p)
    (dtk-tone 500 100 'force)
    (emacspeak-speak-this-char (preceding-char))
    ad-do-it)
   (t ad-do-it))
  ad-return-value)

(defadvice eshell-show-output (after emacspeak pre act comp)
  "Speak output."
  (when (ems-interactive-p)
    (let ((emacspeak-show-point t))
      (emacspeak-auditory-icon 'large-movement)
      (emacspeak-speak-region (point) (mark)))))
(defadvice eshell-mark-output (after emacspeak pre act comp)
  "Speak output."
  (when (ems-interactive-p)
    (let ((emacspeak-show-point t))
      (emacspeak-auditory-icon 'mark-object)
      (emacspeak-speak-line))))
(defadvice eshell-kill-output (after emacspeak pre act comp)
  "Produce auditory feedback."
  (when (ems-interactive-p)
    (emacspeak-auditory-icon 'delete-object)
    (message "Flushed output")))

(defadvice eshell-kill-input (before emacspeak pre act)
  "Provide spoken feedback."
  (when (ems-interactive-p)
    (emacspeak-auditory-icon 'delete-object)
    (emacspeak-speak-line)))

(defadvice eshell-toggle (after emacspeak pre act comp)
  "Provide spoken context feedback."
  (when (ems-interactive-p)
    (cond
     ((eq major-mode 'eshell-mode)
      (emacspeak-setup-programming-mode)
      (emacspeak-speak-line))
     (t (emacspeak-speak-mode-line)))
    (emacspeak-auditory-icon 'select-object)))
(defadvice eshell-toggle-cd (after emacspeak pre act comp)
  "Provide spoken context feedback."
  (when (ems-interactive-p)
    (cond
     ((eq major-mode 'eshell-mode)
      (emacspeak-speak-line))
     (t (emacspeak-speak-mode-line)))
    (emacspeak-auditory-icon 'select-object)))

;;}}}
;;{{{Additional Commands To Enable: 

(cl-loop
 for f in
 '(eshell-forward-argument eshell-backward-argument eshell-bol)
 do
 (eval
  `(defadvice ,f (after emacspeak pre act comp)
     "provide auditory feedback."
     (when
         (ems-interactive-p)
       (let ((emacspeak-show-point t))
         (emacspeak-speak-line)
         (emacspeak-auditory-icon 'large-movement))))))

(cl-loop
 for f in
 '(eshell-pcomplete eshell-complete-lisp-symbol)
 do
 (eval
  `(defadvice ,f (around emacspeak pre act comp)
     "Say what you completed."
     (ems-with-messages-silenced
      (let ((prior (save-excursion (skip-syntax-backward "^ >") (point))))
        ad-do-it
        (if (> (point) prior)
            (tts-with-punctuations
             'all
             (dtk-speak
              (buffer-substring prior (point))))
          (emacspeak-speak-completions-if-available))
        ad-return-value)))))

(defadvice eshell-copy-old-input (after emacspeak pre act comp)
  "Speak what was inserted."
  (when (ems-interactive-p)
    (let ((start
           (save-excursion
             (eshell-bol)
             (point))))
      (emacspeak-auditory-icon 'yank-object)
      (emacspeak-speak-region start (point)))))
(defadvice eshell-get-next-from-history (after emacspeak pre act comp)
  "Speak what was inserted."
  (when (ems-interactive-p)
    (let ((start
           (save-excursion
             (eshell-bol)
             (point))))
      (emacspeak-auditory-icon 'yank-object)
      (emacspeak-speak-region start (point)))))

;;}}}

(provide 'emacspeak-eshell)
;;{{{ end of file

;;; local variables:
;;; folded-file: t
;;; end:

;;}}}
