replicant-vendor_cmsdk/cm/lib/main/java/org/cyanogenmod/platform/internal/ThemeManagerServiceBroker.java

373 lines
12 KiB
Java

/*
* Copyright (C) 2016 The CyanogenMod 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 org.cyanogenmod.platform.internal;
import android.annotation.NonNull;
import android.content.ComponentName;
import android.content.Context;
import android.os.FileUtils;
import android.os.IBinder;
import android.os.RemoteCallbackList;
import android.os.RemoteException;
import android.os.SELinux;
import android.system.ErrnoException;
import android.system.Os;
import android.system.StructStat;
import android.util.Log;
import android.util.Slog;
import cyanogenmod.app.CMContextConstants;
import cyanogenmod.platform.Manifest;
import cyanogenmod.themes.IThemeChangeListener;
import cyanogenmod.themes.IThemeProcessingListener;
import cyanogenmod.themes.IThemeService;
import cyanogenmod.themes.ThemeChangeRequest;
import org.cyanogenmod.internal.util.ThemeUtils;
import org.cyanogenmod.platform.internal.common.BrokeredServiceConnection;
import java.io.File;
import static cyanogenmod.platform.Manifest.permission.ACCESS_THEME_MANAGER;
/**
* Theme service broker for connecting clients to a backing theme manager service.
*
* @hide
*/
public class ThemeManagerServiceBroker extends BrokerableCMSystemService<IThemeService> {
private static final String TAG = ThemeManagerServiceBroker.class.getSimpleName();
private static final boolean DEBUG = false;
private static final ComponentName SERVICE_COMPONENT =
new ComponentName("org.cyanogenmod.themeservice",
"org.cyanogenmod.themeservice.ThemeManagerService");
// Cached change listeners
private final RemoteCallbackList<IThemeChangeListener> mChangeListeners =
new RemoteCallbackList<>();
private final RemoteCallbackList<IThemeProcessingListener> mProcessingListeners =
new RemoteCallbackList<>();
private Context mContext;
private final IThemeService mServiceStubForFailure = new IThemeService.Stub() {
@Override
public void requestThemeChangeUpdates(IThemeChangeListener listener) throws RemoteException {
}
@Override
public void removeUpdates(IThemeChangeListener listener) throws RemoteException {
}
@Override
public void requestThemeChange(ThemeChangeRequest request,
boolean removePerAppThemes) throws RemoteException {
}
@Override
public void applyDefaultTheme() throws RemoteException {
}
@Override
public boolean isThemeApplying() throws RemoteException {
return false;
}
@Override
public int getProgress() throws RemoteException {
return 0;
}
@Override
public boolean processThemeResources(String themePkgName) throws RemoteException {
return false;
}
@Override
public boolean isThemeBeingProcessed(String themePkgName) throws RemoteException {
return false;
}
@Override
public void registerThemeProcessingListener(
IThemeProcessingListener listener) throws RemoteException {
}
@Override
public void unregisterThemeProcessingListener(
IThemeProcessingListener listener) throws RemoteException {
}
@Override
public void rebuildResourceCache() throws RemoteException {
}
@Override
public long getLastThemeChangeTime() throws RemoteException {
return 0;
}
@Override
public int getLastThemeChangeRequestType() throws RemoteException {
return 0;
}
};
private final class BinderService extends IThemeService.Stub {
@Override
public void requestThemeChangeUpdates(IThemeChangeListener listener)
throws RemoteException {
enforcePermission();
getBrokeredService().requestThemeChangeUpdates(listener);
mChangeListeners.register(listener);
}
@Override
public void removeUpdates(IThemeChangeListener listener) throws RemoteException {
enforcePermission();
getBrokeredService().removeUpdates(listener);
mChangeListeners.unregister(listener);
}
@Override
public void requestThemeChange(ThemeChangeRequest request,
boolean removePerAppThemes) throws RemoteException {
enforcePermission();
getBrokeredService().requestThemeChange(request, removePerAppThemes);
}
@Override
public void applyDefaultTheme() throws RemoteException {
enforcePermission();
getBrokeredService().applyDefaultTheme();
}
@Override
public boolean isThemeApplying() throws RemoteException {
enforcePermission();
return getBrokeredService().isThemeApplying();
}
@Override
public int getProgress() throws RemoteException {
enforcePermission();
return getBrokeredService().getProgress();
}
@Override
public boolean processThemeResources(String themePkgName) throws RemoteException {
enforcePermission();
return getBrokeredService().processThemeResources(themePkgName);
}
@Override
public boolean isThemeBeingProcessed(String themePkgName) throws RemoteException {
enforcePermission();
return getBrokeredService().isThemeBeingProcessed(themePkgName);
}
@Override
public void registerThemeProcessingListener(
IThemeProcessingListener listener) throws RemoteException {
enforcePermission();
getBrokeredService().registerThemeProcessingListener(listener);
mProcessingListeners.register(listener);
}
@Override
public void unregisterThemeProcessingListener(
IThemeProcessingListener listener) throws RemoteException {
enforcePermission();
getBrokeredService().unregisterThemeProcessingListener(listener);
mProcessingListeners.unregister(listener);
}
@Override
public void rebuildResourceCache() throws RemoteException {
enforcePermission();
getBrokeredService().rebuildResourceCache();
}
@Override
public long getLastThemeChangeTime() throws RemoteException {
enforcePermission();
return getBrokeredService().getLastThemeChangeTime();
}
@Override
public int getLastThemeChangeRequestType() throws RemoteException {
enforcePermission();
return getBrokeredService().getLastThemeChangeRequestType();
}
}
public ThemeManagerServiceBroker(Context context) {
super(context);
mContext = context;
setBrokeredServiceConnection(mServiceConnection);
}
@Override
protected IThemeService getIBinderAsIInterface(@NonNull IBinder service) {
return IThemeService.Stub.asInterface(service);
}
@Override
protected IThemeService getDefaultImplementation() {
return mServiceStubForFailure;
}
@Override
protected ComponentName getServiceComponent() {
return SERVICE_COMPONENT;
}
@Override
public String getFeatureDeclaration() {
return CMContextConstants.Features.THEMES;
}
@Override
public void onStart() {
if (DEBUG) Slog.d(TAG, "service started");
publishBinderService(CMContextConstants.CM_THEME_SERVICE, new BinderService());
}
@Override
protected String getComponentFilteringPermission() {
return Manifest.permission.ACCESS_THEME_MANAGER;
}
@Override
public void onBootPhase(int phase) {
if (phase == PHASE_SYSTEM_SERVICES_READY) {
// create the main theme directory for brokered service
if (createDirIfNotExists(ThemeUtils.SYSTEM_THEME_PATH)) {
// ensure it has the correct selinux label after creation
SELinux.restorecon(ThemeUtils.SYSTEM_THEME_PATH);
}
if (shouldMigrateFilePermissions()) {
migrateFilePermissions();
}
} else if (phase == PHASE_ACTIVITY_MANAGER_READY) {
tryConnecting();
}
super.onBootPhase(phase);
}
private BrokeredServiceConnection mServiceConnection = new BrokeredServiceConnection() {
@Override
public void onBrokeredServiceConnected() {
// If any change listeners are cached, register them with the newly connected
// service.
IThemeService themeService =
getBrokeredService();
try {
int N = mChangeListeners.beginBroadcast();
if (themeService != null && N > 0) {
for (int i = 0; i < N; i++) {
themeService.requestThemeChangeUpdates(
mChangeListeners.getBroadcastItem(i));
}
}
} catch (RemoteException e) {
/* ignore */
} finally {
mChangeListeners.finishBroadcast();
}
try {
int N = mProcessingListeners.beginBroadcast();
if (themeService != null && N > 0) {
for (int i = 0; i < N; i++) {
themeService.registerThemeProcessingListener(
mProcessingListeners.getBroadcastItem(i));
}
}
} catch (RemoteException e) {
/* ignore */
} finally {
mProcessingListeners.finishBroadcast();
}
}
@Override
public void onBrokeredServiceDisconnected() {
}
};
private void enforcePermission() {
mContext.enforceCallingOrSelfPermission(ACCESS_THEME_MANAGER, null);
}
/**
* @return True if {@link ThemeUtils#SYSTEM_THEME_ALARM_PATH} is not writable by other users
*/
private boolean shouldMigrateFilePermissions() {
return isUserWritable(ThemeUtils.SYSTEM_THEME_ALARM_PATH);
}
/**
* Ensures other users can write files in /data/system/theme/* which is necessary for the
* brokered service to write theme data files. SELinux policies will not allow random third
* party apps to write to this location.
*/
private void migrateFilePermissions() {
File[] files = new File(ThemeUtils.SYSTEM_THEME_PATH).listFiles();
for (File file : files) {
setAllUsersWritable(file, true);
}
}
private void setAllUsersWritable(File file, boolean recursive) {
if (file.isDirectory() && recursive) {
File[] files = file.listFiles();
for (File childFile : files) {
setAllUsersWritable(childFile, recursive);
}
}
if (!isUserWritable(file.getAbsolutePath())) {
file.setWritable(true, false);
}
}
private boolean isUserWritable(String path) {
try {
StructStat stat = Os.stat(path);
return (stat.st_mode & 2) == 0;
} catch (ErrnoException e) {
Log.w(TAG, "Cannot stat " + path);
}
return false;
}
private static boolean createDirIfNotExists(String dirPath) {
final File dir = new File(dirPath);
if (!dir.exists()) {
if (dir.mkdir()) {
FileUtils.setPermissions(dir, FileUtils.S_IRWXU |
FileUtils.S_IRWXG| FileUtils.S_IRWXO, -1, -1);
return true;
}
}
return false;
}
}