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/*
* Copyright (C) 2017 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.display;
import android.app.settings.SettingsEnums;
import android.content.Context;
import android.content.om.IOverlayManager;
import android.content.om.OverlayInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.UserHandle;
import android.text.TextUtils;
import androidx.annotation.VisibleForTesting;
import androidx.preference.ListPreference;
import androidx.preference.Preference;
import com.android.settings.R;
import com.android.settings.core.PreferenceControllerMixin;
import com.android.settings.overlay.FeatureFactory;
import com.android.settingslib.core.AbstractPreferenceController;
import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
public class ThemePreferenceController extends AbstractPreferenceController implements
PreferenceControllerMixin, Preference.OnPreferenceChangeListener {
private static final String KEY_THEME = "theme";
private final MetricsFeatureProvider mMetricsFeatureProvider;
private final IOverlayManager mOverlayService;
private final PackageManager mPackageManager;
public ThemePreferenceController(Context context) {
this(context, IOverlayManager.Stub
.asInterface(ServiceManager.getService(Context.OVERLAY_SERVICE)));
}
@VisibleForTesting
ThemePreferenceController(Context context, IOverlayManager overlayManager) {
super(context);
mOverlayService = overlayManager;
mPackageManager = context.getPackageManager();
mMetricsFeatureProvider = FeatureFactory.getFactory(context).getMetricsFeatureProvider();
}
@Override
public String getPreferenceKey() {
return KEY_THEME;
}
@Override
public boolean handlePreferenceTreeClick(Preference preference) {
if (KEY_THEME.equals(preference.getKey())) {
mMetricsFeatureProvider.action(mContext, SettingsEnums.ACTION_THEME);
}
return false;
}
@Override
public void updateState(Preference preference) {
ListPreference pref = (ListPreference) preference;
String[] pkgs = getAvailableThemes(false /* currentThemeOnly */);
CharSequence[] labels = new CharSequence[pkgs.length];
for (int i = 0; i < pkgs.length; i++) {
try {
labels[i] = mPackageManager.getApplicationInfo(pkgs[i], 0)
.loadLabel(mPackageManager);
} catch (NameNotFoundException e) {
labels[i] = pkgs[i];
}
}
pref.setEntries(labels);
pref.setEntryValues(pkgs);
String theme = getCurrentTheme();
CharSequence themeLabel = null;
for (int i = 0; i < pkgs.length; i++) {
if (TextUtils.equals(pkgs[i], theme)) {
themeLabel = labels[i];
break;
}
}
if (TextUtils.isEmpty(themeLabel)) {
themeLabel = mContext.getString(R.string.default_theme);
}
pref.setSummary(themeLabel);
pref.setValue(theme);
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
String current = getCurrentTheme();
if (Objects.equals(newValue, current)) {
return true;
}
try {
mOverlayService.setEnabledExclusiveInCategory((String) newValue, UserHandle.myUserId());
} catch (RemoteException re) {
throw re.rethrowFromSystemServer();
}
return true;
}
private boolean isTheme(OverlayInfo oi) {
if (!OverlayInfo.CATEGORY_THEME.equals(oi.category)) {
return false;
}
try {
PackageInfo pi = mPackageManager.getPackageInfo(oi.packageName, 0);
return pi != null && !pi.isStaticOverlayPackage();
} catch (PackageManager.NameNotFoundException e) {
return false;
}
}
@Override
public boolean isAvailable() {
if (mOverlayService == null) return false;
String[] themes = getAvailableThemes(false /* currentThemeOnly */);
return themes != null && themes.length > 1;
}
@VisibleForTesting
String getCurrentTheme() {
String[] themePackages = getAvailableThemes(true /* currentThemeOnly */);
return themePackages.length < 1 ? null : themePackages[0];
}
@VisibleForTesting
String[] getAvailableThemes(boolean currentThemeOnly) {
List<OverlayInfo> infos;
List<String> pkgs;
try {
infos = mOverlayService.getOverlayInfosForTarget("android", UserHandle.myUserId());
pkgs = new ArrayList<>(infos.size());
for (int i = 0, size = infos.size(); i < size; i++) {
if (isTheme(infos.get(i))) {
if (infos.get(i).isEnabled() && currentThemeOnly) {
return new String[] {infos.get(i).packageName};
} else {
pkgs.add(infos.get(i).packageName);
}
}
}
} catch (RemoteException re) {
throw re.rethrowFromSystemServer();
}
// Current enabled theme is not found.
if (currentThemeOnly) {
return new String[0];
}
return pkgs.toArray(new String[pkgs.size()]);
}
}
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