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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settings.tts;
import com.android.settings.R;
import com.android.settings.SettingsPreferenceFragment;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.Preference.OnPreferenceChangeListener;
import android.preference.Preference.OnPreferenceClickListener;
import android.preference.PreferenceScreen;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TtsEngines;
import android.text.TextUtils;
import android.util.Log;
import java.util.ArrayList;
import java.util.Locale;
public class TtsEngineSettingsFragment extends SettingsPreferenceFragment implements
OnPreferenceClickListener, OnPreferenceChangeListener {
private static final String TAG = "TtsEngineSettings";
private static final boolean DBG = false;
private static final String KEY_ENGINE_LOCALE = "tts_default_lang";
private static final String KEY_ENGINE_SETTINGS = "tts_engine_settings";
private static final String KEY_INSTALL_DATA = "tts_install_data";
private TtsEngines mEnginesHelper;
private ListPreference mLocalePreference;
private Preference mEngineSettingsPreference;
private Preference mInstallVoicesPreference;
private Intent mEngineSettingsIntent;
private TextToSpeech mTts;
private final TextToSpeech.OnInitListener mTtsInitListener = new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if (status != TextToSpeech.SUCCESS) {
finishFragment();
} else {
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
mLocalePreference.setEnabled(true);
updateVoiceDetails();
}
});
}
}
};
public TtsEngineSettingsFragment() {
super();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.tts_engine_settings);
mEnginesHelper = new TtsEngines(getActivity());
final PreferenceScreen root = getPreferenceScreen();
mLocalePreference = (ListPreference) root.findPreference(KEY_ENGINE_LOCALE);
mLocalePreference.setOnPreferenceChangeListener(this);
mEngineSettingsPreference = root.findPreference(KEY_ENGINE_SETTINGS);
mEngineSettingsPreference.setOnPreferenceClickListener(this);
mInstallVoicesPreference = root.findPreference(KEY_INSTALL_DATA);
mInstallVoicesPreference.setOnPreferenceClickListener(this);
// Remove this preference unless voices are indeed available to install.
root.removePreference(mInstallVoicesPreference);
root.setTitle(getEngineLabel());
root.setKey(getEngineName());
mEngineSettingsPreference.setTitle(getResources().getString(
R.string.tts_engine_settings_title, getEngineLabel()));
mEngineSettingsIntent = mEnginesHelper.getSettingsIntent(getEngineName());
if (mEngineSettingsIntent == null) {
mEngineSettingsPreference.setEnabled(false);
}
mInstallVoicesPreference.setEnabled(false);
mLocalePreference.setEnabled(false);
mTts = new TextToSpeech(getActivity().getApplicationContext(), mTtsInitListener,
getEngineName());
}
@Override
public void onDestroy() {
mTts.shutdown();
super.onDestroy();
}
private void updateVoiceDetails() {
final Intent voiceDataDetails = getArguments().getParcelable(
TtsEnginePreference.FRAGMENT_ARGS_VOICES);
if (DBG) Log.d(TAG, "Parsing voice data details, data: " + voiceDataDetails.toUri(0));
ArrayList<String> available = voiceDataDetails.getStringArrayListExtra(
TextToSpeech.Engine.EXTRA_AVAILABLE_VOICES);
ArrayList<String> unavailable = voiceDataDetails.getStringArrayListExtra(
TextToSpeech.Engine.EXTRA_UNAVAILABLE_VOICES);
if (available == null){
Log.e(TAG, "TTS data check failed (available == null).");
final CharSequence[] empty = new CharSequence[0];
mLocalePreference.setEntries(empty);
mLocalePreference.setEntryValues(empty);
return;
}
if (unavailable != null && unavailable.size() > 0) {
mInstallVoicesPreference.setEnabled(true);
getPreferenceScreen().addPreference(mInstallVoicesPreference);
} else {
getPreferenceScreen().removePreference(mInstallVoicesPreference);
}
if (available.size() > 0) {
updateDefaultLocalePref(available);
} else {
final CharSequence[] empty = new CharSequence[0];
mLocalePreference.setEntries(empty);
mLocalePreference.setEntryValues(empty);
}
}
private void updateDefaultLocalePref(ArrayList<String> availableLangs) {
String currentLocale = mEnginesHelper.getLocalePrefForEngine(
getEngineName());
CharSequence[] entries = new CharSequence[availableLangs.size()];
CharSequence[] entryValues = new CharSequence[availableLangs.size()];
int selectedLanguageIndex = -1;
for (int i = 0; i < availableLangs.size(); i++) {
String[] langCountryVariant = availableLangs.get(i).split("-");
Locale loc = null;
if (langCountryVariant.length == 1){
loc = new Locale(langCountryVariant[0]);
} else if (langCountryVariant.length == 2){
loc = new Locale(langCountryVariant[0], langCountryVariant[1]);
} else if (langCountryVariant.length == 3){
loc = new Locale(langCountryVariant[0], langCountryVariant[1],
langCountryVariant[2]);
}
if (loc != null){
entries[i] = loc.getDisplayName();
entryValues[i] = availableLangs.get(i);
if (entryValues[i].equals(currentLocale)) {
selectedLanguageIndex = i;
}
}
}
mLocalePreference.setEntries(entries);
mLocalePreference.setEntryValues(entryValues);
if (selectedLanguageIndex > -1) {
mLocalePreference.setValueIndex(selectedLanguageIndex);
} else {
mLocalePreference.setValueIndex(0);
updateLanguageTo(availableLangs.get(0));
}
}
/**
* Ask the current default engine to launch the matching INSTALL_TTS_DATA activity
* so the required TTS files are properly installed.
*/
private void installVoiceData() {
if (TextUtils.isEmpty(getEngineName())) return;
Intent intent = new Intent(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setPackage(getEngineName());
try {
Log.v(TAG, "Installing voice data: " + intent.toUri(0));
startActivity(intent);
} catch (ActivityNotFoundException ex) {
Log.e(TAG, "Failed to install TTS data, no acitivty found for " + intent + ")");
}
}
@Override
public boolean onPreferenceClick(Preference preference) {
if (preference == mInstallVoicesPreference) {
installVoiceData();
return true;
} else if (preference == mEngineSettingsPreference) {
startActivity(mEngineSettingsIntent);
return true;
}
return false;
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
if (preference == mLocalePreference) {
updateLanguageTo((String) newValue);
return true;
}
return false;
}
private void updateLanguageTo(String locale) {
mEnginesHelper.updateLocalePrefForEngine(getEngineName(), locale);
if (getEngineName().equals(mTts.getCurrentEngine())) {
String[] localeArray = TtsEngines.parseLocalePref(locale);
if (localeArray != null) {
mTts.setLanguage(new Locale(localeArray[0], localeArray[1], localeArray[2]));
}
}
}
private String getEngineName() {
return getArguments().getString(TtsEnginePreference.FRAGMENT_ARGS_NAME);
}
private String getEngineLabel() {
return getArguments().getString(TtsEnginePreference.FRAGMENT_ARGS_LABEL);
}
}
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