speechtoolbar.py

# Copyright (C) 2006, Red Hat, Inc.
#
# 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 2 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

import os
import json
from gettext import gettext as _
import logging

from gi.repository import Gtk
from gi.repository import GObject

from sugar3.graphics.toolbutton import ToolButton
from sugar3.graphics.toggletoolbutton import ToggleToolButton
from sugar3.graphics.combobox import ComboBox
from sugar3.graphics.toolcombobox import ToolComboBox

import speech


class SpeechToolbar(Gtk.Toolbar):

    def __init__(self, activity):
        GObject.GObject.__init__(self)
        self._activity = activity
        if not speech.supported:
            return
        self.is_paused = False
        self.load_speech_parameters()

        self.sorted_voices = [i for i in speech.voices()]
        self.sorted_voices.sort(self.compare_voices)
        default = 0
        for voice in self.sorted_voices:
            if voice[0] == speech.voice[0]:
                break
            default = default + 1

        # Play button
        self.play_btn = ToggleToolButton('media-playback-start')
        self.play_btn.show()
        self.play_toggled_handler = self.play_btn.connect(
            'toggled', self.play_cb)
        self.insert(self.play_btn, -1)
        self.play_btn.set_tooltip(_('Play / Pause'))

        # Stop button
        self.stop_btn = ToolButton('media-playback-stop')
        self.stop_btn.show()
        self.stop_btn.connect('clicked', self.stop_cb)
        self.stop_btn.set_sensitive(False)
        self.insert(self.stop_btn, -1)
        self.stop_btn.set_tooltip(_('Stop'))

        self.voice_combo = ComboBox()
        for voice in self.sorted_voices:
            self.voice_combo.append_item(voice, voice[0])
        self.voice_combo.set_active(default)

        self.voice_combo.connect('changed', self.voice_changed_cb)
        combotool = ToolComboBox(self.voice_combo)
        self.insert(combotool, -1)
        combotool.show()
        speech.reset_cb = self.reset_buttons_cb
        speech.end_text_cb = self.reset_buttons_cb

    def compare_voices(self,  a,  b):
        if a[0].lower() == b[0].lower():
            return 0
        if a[0] .lower() < b[0].lower():
            return -1
        if a[0] .lower() > b[0].lower():
            return 1

    def voice_changed_cb(self, combo):
        speech.voice = combo.props.value
        speech.say(speech.voice[0])
        self.save_speech_parameters()

    def load_speech_parameters(self):
        speech_parameters = {}
        data_path = os.path.join(self._activity.get_activity_root(), 'data')
        data_file_name = os.path.join(data_path, 'speech_params.json')
        if os.path.exists(data_file_name):
            f = open(data_file_name, 'r')
            try:
                speech_parameters = json.load(f)
                speech.voice = speech_parameters['voice']
            finally:
                f.close()

    def save_speech_parameters(self):
        speech_parameters = {}
        speech_parameters['voice'] = speech.voice
        data_path = os.path.join(self._activity.get_activity_root(), 'data')
        data_file_name = os.path.join(data_path, 'speech_params.json')
        f = open(data_file_name, 'w')
        try:
            json.dump(speech_parameters, f)
        finally:
            f.close()

    def reset_buttons_cb(self):
        logging.error('reset buttons')
        self.play_btn.set_icon_name('media-playback-start')
        self.stop_btn.set_sensitive(False)
        self.play_btn.handler_block(self.play_toggled_handler)
        self.play_btn.set_active(False)
        self.play_btn.handler_unblock(self.play_toggled_handler)
        self.is_paused = False

    def play_cb(self, widget):
        self.stop_btn.set_sensitive(True)
        if widget.get_active():
            self.play_btn.set_icon_name('media-playback-pause')
            logging.error('Paused %s', self.is_paused)
            if not self.is_paused:
                # get the text to speech, if there are a selection,
                # play selected text, if not, play all
                abi = self._activity.abiword_canvas
                selection = abi.get_selection('text/plain')
                if not selection or selection[0] is None or selection[1] == 0:
                    # nothing selected
                    abi.select_all()
                    text = abi.get_selection('text/plain')[0]
                    abi.moveto_bod()
                else:
                    text = selection[0]
                speech.play(text)
            else:
                logging.error('Continue play')
                speech.continue_play()
        else:
            self.play_btn.set_icon_name('media-playback-start')
            self.is_paused = True
            speech.pause()

    def stop_cb(self, widget):
        self.stop_btn.set_sensitive(False)
        self.play_btn.set_icon_name('media-playback-start')
        self.play_btn.set_active(False)
        self.is_paused = False
        speech.stop()