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/*
* Copyright (C) 2018 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.inputmethod;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.provider.UserDictionary;
import android.text.TextUtils;
import android.view.inputmethod.InputMethodInfo;
import android.view.inputmethod.InputMethodManager;
import android.view.inputmethod.InputMethodSubtype;
import androidx.annotation.NonNull;
import androidx.annotation.VisibleForTesting;
import androidx.preference.Preference;
import androidx.preference.PreferenceScreen;
import com.android.settings.R;
import com.android.settings.Utils;
import com.android.settings.core.BasePreferenceController;
import com.android.settingslib.core.lifecycle.LifecycleObserver;
import com.android.settingslib.core.lifecycle.events.OnStart;
import java.util.List;
import java.util.Locale;
import java.util.TreeSet;
public class UserDictionaryListPreferenceController extends BasePreferenceController implements
LifecycleObserver, OnStart {
public static final String USER_DICTIONARY_SETTINGS_INTENT_ACTION =
"android.settings.USER_DICTIONARY_SETTINGS";
private final String KEY_ALL_LANGUAGE = "all_languages";
private String mLocale;
private PreferenceScreen mScreen;
public UserDictionaryListPreferenceController(Context context, String key) {
super(context, key);
}
public void setLocale(String locale) {
mLocale = locale;
}
@Override
public int getAvailabilityStatus() {
return AVAILABLE;
}
@Override
public void displayPreference(PreferenceScreen screen) {
super.displayPreference(screen);
// This is to make newly inserted languages being sorted alphabetically when updating
// the existing preferenceScreen, and for "For all languages" to be always on the top.
screen.setOrderingAsAdded(false);
mScreen = screen;
}
@Override
public void onStart() {
createUserDictSettings();
}
@NonNull
public static TreeSet<String> getUserDictionaryLocalesSet(Context context) {
final Cursor cursor = context.getContentResolver().query(
UserDictionary.Words.CONTENT_URI, new String[]{UserDictionary.Words.LOCALE},
null, null, null);
final TreeSet<String> localeSet = new TreeSet<>();
if (cursor == null) {
// The user dictionary service is not present or disabled. Return empty set.
return localeSet;
}
try {
if (cursor.moveToFirst()) {
final int columnIndex = cursor.getColumnIndex(UserDictionary.Words.LOCALE);
do {
final String locale = cursor.getString(columnIndex);
localeSet.add(null != locale ? locale : "");
} while (cursor.moveToNext());
}
} finally {
cursor.close();
}
// CAVEAT: Keep this for consistency of the implementation between Keyboard and Settings
// if (!UserDictionarySettings.IS_SHORTCUT_API_SUPPORTED) {
// // For ICS, we need to show "For all languages" in case that the keyboard locale
// // is different from the system locale
// localeSet.add("");
// }
final InputMethodManager imm =
(InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
final List<InputMethodInfo> imis = imm.getEnabledInputMethodList();
for (final InputMethodInfo imi : imis) {
final List<InputMethodSubtype> subtypes =
imm.getEnabledInputMethodSubtypeList(
imi, true /* allowsImplicitlySelectedSubtypes */);
for (InputMethodSubtype subtype : subtypes) {
final String locale = subtype.getLocale();
if (!TextUtils.isEmpty(locale)) {
localeSet.add(locale);
}
}
}
// We come here after we have collected locales from existing user dictionary entries and
// enabled subtypes. If we already have the locale-without-country version of the system
// locale, we don't add the system locale to avoid confusion even though it's technically
// correct to add it.
if (!localeSet.contains(Locale.getDefault().getLanguage())) {
localeSet.add(Locale.getDefault().toString());
}
return localeSet;
}
@VisibleForTesting
TreeSet<String> getUserDictLocalesSet(Context context) {
return getUserDictionaryLocalesSet(context);
}
/**
* Creates the entries that allow the user to go into the user dictionary for each locale.
*/
private void createUserDictSettings() {
final TreeSet<String> localeSet = getUserDictLocalesSet(mContext);
final int prefCount = mScreen.getPreferenceCount();
String prefKey;
if (mLocale != null) {
// If the caller explicitly specify empty string as a locale, we'll show "all languages"
// in the list.
localeSet.add(mLocale);
}
if (localeSet.size() > 1) {
// Have an "All languages" entry in the languages list if there are two or more active
// languages
localeSet.add("");
}
// Update the existing preferenceScreen according to the corresponding data set.
if (prefCount > 0) {
for (int i = prefCount - 1; i >= 0; i--) {
prefKey = mScreen.getPreference(i).getKey();
if (TextUtils.isEmpty(prefKey) || TextUtils.equals(KEY_ALL_LANGUAGE, prefKey)) {
continue;
}
if (!localeSet.isEmpty() && localeSet.contains(prefKey)) {
localeSet.remove(prefKey);
continue;
}
mScreen.removePreference(mScreen.findPreference(prefKey));
}
}
if (localeSet.isEmpty() && prefCount == 0) {
mScreen.addPreference(createUserDictionaryPreference(null));
} else {
for (String locale : localeSet) {
final Preference pref = createUserDictionaryPreference(locale);
if (mScreen.findPreference(pref.getKey()) == null) {
mScreen.addPreference(pref);
}
}
}
}
/**
* Create a single User Dictionary Preference object, with its parameters set.
*
* @param locale The locale for which this user dictionary is for.
* @return The corresponding preference.
*/
private Preference createUserDictionaryPreference(String locale) {
final String KEY_LOCALE = "locale";
final Preference newPref = new Preference(mScreen.getContext());
final Intent intent = new Intent(USER_DICTIONARY_SETTINGS_INTENT_ACTION);
if (locale == null) {
newPref.setTitle(Locale.getDefault().getDisplayName());
newPref.setKey(Locale.getDefault().toString());
} else {
if (TextUtils.isEmpty(locale)) {
newPref.setTitle(mContext.getString(R.string.user_dict_settings_all_languages));
newPref.setKey(KEY_ALL_LANGUAGE);
newPref.setOrder(0);
} else {
newPref.setTitle(Utils.createLocaleFromString(locale).getDisplayName());
newPref.setKey(locale);
}
intent.putExtra(KEY_LOCALE, locale);
newPref.getExtras().putString(KEY_LOCALE, locale);
}
newPref.setIntent(intent);
newPref.setFragment(UserDictionarySettings.class.getName());
return newPref;
}
}
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