Move AccessibilityUtils to SettingsLib

/*

 * Copyright (C) 2015 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.settingslib.accessibility;

import android.content.ComponentName;

import android.content.Context;

import android.content.res.Configuration;

import android.content.res.Resources;

import android.provider.Settings;

import android.text.TextUtils;

import java.util.Collections;

import java.util.HashSet;

import java.util.Locale;

import java.util.Set;

public class AccessibilityUtils {

    public static final char ENABLED_ACCESSIBILITY_SERVICES_SEPARATOR = ':';

    final static TextUtils.SimpleStringSplitter sStringColonSplitter =

            new TextUtils.SimpleStringSplitter(ENABLED_ACCESSIBILITY_SERVICES_SEPARATOR);

    /**

     * @return the set of enabled accessibility services. If there are not services

     * it returned the unmodifiable {@link Collections#emptySet()}.

     */

    public static Set<ComponentName> getEnabledServicesFromSettings(Context context) {

        final String enabledServicesSetting = Settings.Secure.getString(

                context.getContentResolver(), Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES);

        if (enabledServicesSetting == null) {

            return Collections.emptySet();

        }

        final Set<ComponentName> enabledServices = new HashSet<ComponentName>();

        final TextUtils.SimpleStringSplitter colonSplitter = sStringColonSplitter;

        colonSplitter.setString(enabledServicesSetting);

        while (colonSplitter.hasNext()) {

            final String componentNameString = colonSplitter.next();

            final ComponentName enabledService = ComponentName.unflattenFromString(

                    componentNameString);

            if (enabledService != null) {

                enabledServices.add(enabledService);

            }

        }

        return enabledServices;

    }

    /**

     * @return a localized version of the text resource specified by resId

     */

    public static CharSequence getTextForLocale(Context context, Locale locale, int resId) {

        final Resources res = context.getResources();

        final Configuration config = new Configuration(res.getConfiguration());

        config.setLocale(locale);

        final Context langContext = context.createConfigurationContext(config);

        return langContext.getText(resId);

    }

}