/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the
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* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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package com.android.settings.display;
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import android.app.settings.SettingsEnums;
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import android.content.Context;
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import android.content.om.IOverlayManager;
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import android.content.om.OverlayInfo;
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import android.content.pm.PackageInfo;
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import android.content.pm.PackageManager;
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import android.content.pm.PackageManager.NameNotFoundException;
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import android.os.RemoteException;
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import android.os.ServiceManager;
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import android.os.UserHandle;
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import android.text.TextUtils;
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import androidx.annotation.VisibleForTesting;
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import androidx.preference.ListPreference;
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import androidx.preference.Preference;
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import com.android.settings.R;
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import com.android.settings.core.PreferenceControllerMixin;
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import com.android.settings.overlay.FeatureFactory;
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import com.android.settingslib.core.AbstractPreferenceController;
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import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Objects;
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public class ThemePreferenceController extends AbstractPreferenceController implements
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PreferenceControllerMixin, Preference.OnPreferenceChangeListener {
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private static final String KEY_THEME = "theme";
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private final MetricsFeatureProvider mMetricsFeatureProvider;
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private final IOverlayManager mOverlayService;
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private final PackageManager mPackageManager;
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public ThemePreferenceController(Context context) {
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this(context, IOverlayManager.Stub
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.asInterface(ServiceManager.getService(Context.OVERLAY_SERVICE)));
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}
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@VisibleForTesting
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ThemePreferenceController(Context context, IOverlayManager overlayManager) {
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super(context);
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mOverlayService = overlayManager;
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mPackageManager = context.getPackageManager();
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mMetricsFeatureProvider = FeatureFactory.getFactory(context).getMetricsFeatureProvider();
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}
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@Override
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public String getPreferenceKey() {
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return KEY_THEME;
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}
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@Override
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public boolean handlePreferenceTreeClick(Preference preference) {
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if (KEY_THEME.equals(preference.getKey())) {
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mMetricsFeatureProvider.action(mContext, SettingsEnums.ACTION_THEME);
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}
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return false;
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}
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@Override
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public void updateState(Preference preference) {
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ListPreference pref = (ListPreference) preference;
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String[] pkgs = getAvailableThemes(false /* currentThemeOnly */);
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CharSequence[] labels = new CharSequence[pkgs.length];
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for (int i = 0; i < pkgs.length; i++) {
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try {
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labels[i] = mPackageManager.getApplicationInfo(pkgs[i], 0)
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.loadLabel(mPackageManager);
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} catch (NameNotFoundException e) {
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labels[i] = pkgs[i];
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}
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}
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pref.setEntries(labels);
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pref.setEntryValues(pkgs);
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String theme = getCurrentTheme();
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CharSequence themeLabel = null;
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for (int i = 0; i < pkgs.length; i++) {
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if (TextUtils.equals(pkgs[i], theme)) {
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themeLabel = labels[i];
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break;
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}
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}
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if (TextUtils.isEmpty(themeLabel)) {
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themeLabel = mContext.getString(R.string.default_theme);
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}
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pref.setSummary(themeLabel);
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pref.setValue(theme);
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}
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@Override
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public boolean onPreferenceChange(Preference preference, Object newValue) {
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String current = getCurrentTheme();
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if (Objects.equals(newValue, current)) {
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return true;
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}
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try {
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mOverlayService.setEnabledExclusiveInCategory((String) newValue, UserHandle.myUserId());
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} catch (RemoteException re) {
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throw re.rethrowFromSystemServer();
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}
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return true;
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}
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private boolean isTheme(OverlayInfo oi) {
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if (!OverlayInfo.CATEGORY_THEME.equals(oi.category)) {
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return false;
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}
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try {
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PackageInfo pi = mPackageManager.getPackageInfo(oi.packageName, 0);
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return pi != null && !pi.isStaticOverlayPackage();
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} catch (PackageManager.NameNotFoundException e) {
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return false;
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}
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}
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@Override
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public boolean isAvailable() {
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if (mOverlayService == null) return false;
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String[] themes = getAvailableThemes(false /* currentThemeOnly */);
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return themes != null && themes.length > 1;
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}
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@VisibleForTesting
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String getCurrentTheme() {
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String[] themePackages = getAvailableThemes(true /* currentThemeOnly */);
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return themePackages.length < 1 ? null : themePackages[0];
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}
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@VisibleForTesting
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String[] getAvailableThemes(boolean currentThemeOnly) {
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List<OverlayInfo> infos;
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List<String> pkgs;
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try {
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infos = mOverlayService.getOverlayInfosForTarget("android", UserHandle.myUserId());
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pkgs = new ArrayList<>(infos.size());
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for (int i = 0, size = infos.size(); i < size; i++) {
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if (isTheme(infos.get(i))) {
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if (infos.get(i).isEnabled() && currentThemeOnly) {
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return new String[] {infos.get(i).packageName};
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} else {
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pkgs.add(infos.get(i).packageName);
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}
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}
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}
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} catch (RemoteException re) {
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throw re.rethrowFromSystemServer();
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}
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// Current enabled theme is not found.
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if (currentThemeOnly) {
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return new String[0];
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}
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return pkgs.toArray(new String[pkgs.size()]);
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}
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}
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