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/*
* Copyright (C) 2008-2009 Google Inc.
*
* 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.keyboard.KeyboardParser;
import com.android.inputmethod.latin.BinaryDictionary;
import com.android.inputmethod.latin.R;
import com.android.inputmethod.latin.Settings;
import com.android.inputmethod.latin.SharedPreferencesCompat;
import com.android.inputmethod.latin.SubtypeSwitcher;
import com.android.inputmethod.latin.Suggest;
import com.android.inputmethod.latin.Utils;
import org.xmlpull.v1.XmlPullParserException;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.content.res.Resources;
import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceGroup;
import android.preference.PreferenceManager;
import android.text.TextUtils;
import android.util.Pair;
import java.io.IOException;
import java.text.Collator;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Locale;
public class InputLanguageSelection extends PreferenceActivity {
private SharedPreferences mPrefs;
private String mSelectedLanguages;
private HashMap<CheckBoxPreference, Locale> mLocaleMap =
new HashMap<CheckBoxPreference, Locale>();
private static class Loc implements Comparable<Object> {
private static Collator sCollator = Collator.getInstance();
private String mLabel;
public final Locale mLocale;
public Loc(String label, Locale locale) {
this.mLabel = label;
this.mLocale = locale;
}
public void setLabel(String label) {
this.mLabel = label;
}
@Override
public String toString() {
return this.mLabel;
}
@Override
public int compareTo(Object o) {
return sCollator.compare(this.mLabel, ((Loc) o).mLabel);
}
}
@Override
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
addPreferencesFromResource(R.xml.language_prefs);
// Get the settings preferences
mPrefs = PreferenceManager.getDefaultSharedPreferences(this);
mSelectedLanguages = mPrefs.getString(Settings.PREF_SELECTED_LANGUAGES, "");
String[] languageList = mSelectedLanguages.split(",");
ArrayList<Loc> availableLanguages = getUniqueLocales();
PreferenceGroup parent = getPreferenceScreen();
for (int i = 0; i < availableLanguages.size(); i++) {
Locale locale = availableLanguages.get(i).mLocale;
final Pair<Boolean, Boolean> hasDictionaryOrLayout = hasDictionaryOrLayout(locale);
final boolean hasDictionary = hasDictionaryOrLayout.first;
final boolean hasLayout = hasDictionaryOrLayout.second;
// Add this locale to the supported list if:
// 1) this locale has a layout/ 2) this locale has a dictionary and the length
// of the locale is equal to or larger than 5.
if (!hasLayout && !(hasDictionary && locale.toString().length() >= 5)) {
continue;
}
CheckBoxPreference pref = new CheckBoxPreference(this);
pref.setTitle(SubtypeSwitcher.getFullDisplayName(locale, true));
boolean checked = isLocaleIn(locale, languageList);
pref.setChecked(checked);
if (hasDictionary) {
pref.setSummary(R.string.has_dictionary);
}
mLocaleMap.put(pref, locale);
parent.addPreference(pref);
}
}
private boolean isLocaleIn(Locale locale, String[] list) {
String lang = get5Code(locale);
for (int i = 0; i < list.length; i++) {
if (lang.equalsIgnoreCase(list[i])) return true;
}
return false;
}
private Pair<Boolean, Boolean> hasDictionaryOrLayout(Locale locale) {
if (locale == null) return new Pair<Boolean, Boolean>(false, false);
final Resources res = getResources();
final Locale saveLocale = Utils.setSystemLocale(res, locale);
boolean hasDictionary = false;
boolean hasLayout = false;
try {
BinaryDictionary bd = BinaryDictionary.initDictionaryFromManager(this, Suggest.DIC_MAIN,
locale, Utils.getMainDictionaryResourceId(res));
// Is the dictionary larger than a placeholder? Arbitrarily chose a lower limit of
// 4000-5000 words, whereas the LARGE_DICTIONARY is about 20000+ words.
if (bd.getSize() > Suggest.LARGE_DICTIONARY_THRESHOLD / 4) {
hasDictionary = true;
}
bd.close();
final String localeStr = locale.toString();
final String[] layoutCountryCodes = KeyboardParser.parseKeyboardLocale(
this, R.xml.kbd_qwerty).split(",", -1);
if (!TextUtils.isEmpty(localeStr) && layoutCountryCodes.length > 0) {
for (String s : layoutCountryCodes) {
if (s.equals(localeStr)) {
hasLayout = true;
break;
}
}
}
} catch (XmlPullParserException e) {
} catch (IOException e) {
}
Utils.setSystemLocale(res, saveLocale);
return new Pair<Boolean, Boolean>(hasDictionary, hasLayout);
}
private String get5Code(Locale locale) {
String country = locale.getCountry();
return locale.getLanguage()
+ (TextUtils.isEmpty(country) ? "" : "_" + country);
}
@Override
protected void onResume() {
super.onResume();
}
@Override
protected void onPause() {
super.onPause();
// Save the selected languages
String checkedLanguages = "";
PreferenceGroup parent = getPreferenceScreen();
int count = parent.getPreferenceCount();
for (int i = 0; i < count; i++) {
CheckBoxPreference pref = (CheckBoxPreference) parent.getPreference(i);
if (pref.isChecked()) {
checkedLanguages += get5Code(mLocaleMap.get(pref)) + ",";
}
}
if (checkedLanguages.length() < 1) checkedLanguages = null; // Save null
Editor editor = mPrefs.edit();
editor.putString(Settings.PREF_SELECTED_LANGUAGES, checkedLanguages);
SharedPreferencesCompat.apply(editor);
}
public ArrayList<Loc> getUniqueLocales() {
String[] locales = getAssets().getLocales();
Arrays.sort(locales);
ArrayList<Loc> uniqueLocales = new ArrayList<Loc>();
final int origSize = locales.length;
Loc[] preprocess = new Loc[origSize];
int finalSize = 0;
for (int i = 0 ; i < origSize; i++ ) {
String s = locales[i];
int len = s.length();
String language = "";
String country = "";
if (len == 5) {
language = s.substring(0, 2);
country = s.substring(3, 5);
} else if (len < 5) {
language = s;
}
Locale l = new Locale(language, country);
// Exclude languages that are not relevant to LatinIME
if (TextUtils.isEmpty(language)) {
continue;
}
if (finalSize == 0) {
preprocess[finalSize++] =
new Loc(SubtypeSwitcher.getFullDisplayName(l, true), l);
} else {
// check previous entry:
// same lang and a country -> upgrade to full name and
// insert ours with full name
// diff lang -> insert ours with lang-only name
if (preprocess[finalSize-1].mLocale.getLanguage().equals(
language)) {
preprocess[finalSize-1].setLabel(SubtypeSwitcher.getFullDisplayName(
preprocess[finalSize-1].mLocale, false));
preprocess[finalSize++] =
new Loc(SubtypeSwitcher.getFullDisplayName(l, false), l);
} else {
String displayName;
if (s.equals("zz_ZZ")) {
// ignore this locale
} else {
displayName = SubtypeSwitcher.getFullDisplayName(l, true);
preprocess[finalSize++] = new Loc(displayName, l);
}
}
}
}
for (int i = 0; i < finalSize ; i++) {
uniqueLocales.add(preprocess[i]);
}
return uniqueLocales;
}
}
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