/*
* Copyright (C) 2010 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.inputmethod.deprecated.languageswitcher;
import com.android.inputmethod.compat.SharedPreferencesCompat;
import com.sugree.inputmethod.latin.LatinIME;
import com.sugree.inputmethod.latin.LatinImeLogger;
import com.sugree.inputmethod.latin.LocaleUtils;
import com.sugree.inputmethod.latin.Settings;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.content.res.Configuration;
import android.text.TextUtils;
import android.util.Log;
import java.util.ArrayList;
import java.util.Locale;
/**
* Keeps track of list of selected input languages and the current
* input language that the user has selected.
*/
public class LanguageSwitcher {
private static final String TAG = LanguageSwitcher.class.getSimpleName();
@SuppressWarnings("unused")
private static final String KEYBOARD_MODE = "keyboard";
private static final String[] EMPTY_STIRNG_ARRAY = new String[0];
private final ArrayList<Locale> mLocales = new ArrayList<Locale>();
private final LatinIME mIme;
private String[] mSelectedLanguageArray = EMPTY_STIRNG_ARRAY;
private String mSelectedLanguages;
private int mCurrentIndex = 0;
private String mDefaultInputLanguage;
private Locale mDefaultInputLocale;
private Locale mSystemLocale;
public LanguageSwitcher(LatinIME ime) {
mIme = ime;
}
public int getLocaleCount() {
return mLocales.size();
}
public void onConfigurationChanged(Configuration conf, SharedPreferences prefs) {
final Locale newLocale = conf.locale;
if (!getSystemLocale().toString().equals(newLocale.toString())) {
loadLocales(prefs, newLocale);
}
}
/**
* Loads the currently selected input languages from shared preferences.
* @param sp shared preference for getting the current input language and enabled languages
* @param systemLocale the current system locale, stored for changing the current input language
* based on the system current system locale.
* @return whether there was any change
*/
public boolean loadLocales(SharedPreferences sp, Locale systemLocale) {
if (LatinImeLogger.sDBG) {
Log.d(TAG, "load locales");
}
if (systemLocale != null) {
setSystemLocale(systemLocale);
}
String selectedLanguages = sp.getString(Settings.PREF_SELECTED_LANGUAGES, null);
String currentLanguage = sp.getString(Settings.PREF_INPUT_LANGUAGE, null);
if (TextUtils.isEmpty(selectedLanguages)) {
mSelectedLanguageArray = EMPTY_STIRNG_ARRAY;
mSelectedLanguages = null;
loadDefaults();
if (mLocales.size() == 0) {
return false;
}
mLocales.clear();
return true;
}
if (selectedLanguages.equals(mSelectedLanguages)) {
return false;
}
mSelectedLanguageArray = selectedLanguages.split(",");
mSelectedLanguages = selectedLanguages; // Cache it for comparison later
constructLocales();
mCurrentIndex = 0;
if (currentLanguage != null) {
// Find the index
mCurrentIndex = 0;
for (int i = 0; i < mLocales.size(); i++) {
if (mSelectedLanguageArray[i].equals(currentLanguage)) {
mCurrentIndex = i;
break;
}
}
// If we didn't find the index, use the first one
}
return true;
}
private void loadDefaults() {
if (LatinImeLogger.sDBG) {
Log.d(TAG, "load default locales:");
}
mDefaultInputLocale = mIme.getResources().getConfiguration().locale;
String country = mDefaultInputLocale.getCountry();
mDefaultInputLanguage = mDefaultInputLocale.getLanguage() +
(TextUtils.isEmpty(country) ? "" : "_" + country);
}
private void constructLocales() {
mLocales.clear();
for (final String lang : mSelectedLanguageArray) {
final Locale locale = LocaleUtils.constructLocaleFromString(lang);
mLocales.add(locale);
}
}
/**
* Returns the currently selected input language code, or the display language code if
* no specific locale was selected for input.
*/
public String getInputLanguage() {
if (getLocaleCount() == 0) return mDefaultInputLanguage;
return mSelectedLanguageArray[mCurrentIndex];
}
/**
* Returns the list of enabled language codes.
*/
public String[] getEnabledLanguages(boolean allowImplicitlySelectedLanguages) {
if (mSelectedLanguageArray.length == 0 && allowImplicitlySelectedLanguages) {
return new String[] { mDefaultInputLanguage };
}
return mSelectedLanguageArray;
}
/**
* Returns the currently selected input locale, or the display locale if no specific
* locale was selected for input.
*/
public Locale getInputLocale() {
if (getLocaleCount() == 0) return mDefaultInputLocale;
return mLocales.get(mCurrentIndex);
}
private int nextLocaleIndex() {
final int size = mLocales.size();
return (mCurrentIndex + 1) % size;
}
private int prevLocaleIndex() {
final int size = mLocales.size();
return (mCurrentIndex - 1 + size) % size;
}
/**
* Returns the next input locale in the list. Wraps around to the beginning of the
* list if we're at the end of the list.
*/
public Locale getNextInputLocale() {
if (getLocaleCount() == 0) return mDefaultInputLocale;
return mLocales.get(nextLocaleIndex());
}
/**
* Sets the system locale (display UI) used for comparing with the input language.
* @param locale the locale of the system
*/
private void setSystemLocale(Locale locale) {
mSystemLocale = locale;
}
/**
* Returns the system locale.
* @return the system locale
*/
private Locale getSystemLocale() {
return mSystemLocale;
}
/**
* Returns the previous input locale in the list. Wraps around to the end of the
* list if we're at the beginning of the list.
*/
public Locale getPrevInputLocale() {
if (getLocaleCount() == 0) return mDefaultInputLocale;
return mLocales.get(prevLocaleIndex());
}
public void reset() {
mCurrentIndex = 0;
}
public void next() {
mCurrentIndex = nextLocaleIndex();
}
public void prev() {
mCurrentIndex = prevLocaleIndex();
}
public void setLocale(String localeStr) {
final int N = mLocales.size();
for (int i = 0; i < N; ++i) {
if (mLocales.get(i).toString().equals(localeStr)) {
mCurrentIndex = i;
}
}
}
public void persist(SharedPreferences prefs) {
Editor editor = prefs.edit();
editor.putString(Settings.PREF_INPUT_LANGUAGE, getInputLanguage());
SharedPreferencesCompat.apply(editor);
}
}