| /** |
| * 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.server.vr; |
| |
| import android.app.AppOpsManager; |
| import android.annotation.NonNull; |
| import android.content.Context; |
| import android.content.ComponentName; |
| import android.content.Intent; |
| import android.content.pm.PackageManager; |
| import android.os.Binder; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.IInterface; |
| import android.os.Looper; |
| import android.os.UserHandle; |
| import android.provider.Settings; |
| import android.service.vr.IVrListener; |
| import android.service.vr.VrListenerService; |
| import android.util.ArraySet; |
| import android.util.Slog; |
| |
| import com.android.internal.R; |
| import com.android.server.SystemService; |
| import com.android.server.vr.EnabledComponentsObserver.EnabledComponentChangeListener; |
| import com.android.server.utils.ManagedApplicationService; |
| import com.android.server.utils.ManagedApplicationService.BinderChecker; |
| |
| import java.util.ArrayList; |
| import java.util.Set; |
| |
| /** |
| * Service tracking whether VR mode is active, and notifying listening services of state changes. |
| * <p/> |
| * Services running in system server may modify the state of VrManagerService via the interface in |
| * VrManagerInternal, and may register to receive callbacks when the system VR mode changes via the |
| * interface given in VrStateListener. |
| * <p/> |
| * Device vendors may choose to receive VR state changes by implementing the VR mode HAL, e.g.: |
| * hardware/libhardware/modules/vr |
| * <p/> |
| * In general applications may enable or disable VR mode by calling |
| * {@link android.app.Activity#setVrMode)}. An application may also implement a service to be run |
| * while in VR mode by implementing {@link android.service.vr.VrListenerService}. |
| * |
| * @see {@link android.service.vr.VrListenerService} |
| * @see {@link com.android.server.vr.VrManagerInternal} |
| * @see {@link com.android.server.vr.VrStateListener} |
| * |
| * @hide |
| */ |
| public class VrManagerService extends SystemService implements EnabledComponentChangeListener{ |
| |
| public static final String TAG = "VrManagerService"; |
| |
| private static native void initializeNative(); |
| private static native void setVrModeNative(boolean enabled); |
| |
| private final Object mLock = new Object(); |
| |
| private final IBinder mOverlayToken = new Binder(); |
| |
| // State protected by mLock |
| private boolean mVrModeEnabled = false; |
| private final Set<VrStateListener> mListeners = new ArraySet<>(); |
| private EnabledComponentsObserver mComponentObserver; |
| private ManagedApplicationService mCurrentVrService; |
| private Context mContext; |
| |
| private static final BinderChecker sBinderChecker = new BinderChecker() { |
| @Override |
| public IInterface asInterface(IBinder binder) { |
| return IVrListener.Stub.asInterface(binder); |
| } |
| |
| @Override |
| public boolean checkType(IInterface service) { |
| return service instanceof IVrListener; |
| } |
| }; |
| |
| /** |
| * Called when a user, package, or setting changes that could affect whether or not the |
| * currently bound VrListenerService is changed. |
| */ |
| @Override |
| public void onEnabledComponentChanged() { |
| synchronized (mLock) { |
| if (mCurrentVrService == null) { |
| return; // No active services |
| } |
| |
| // There is an active service, update it if needed |
| updateCurrentVrServiceLocked(mVrModeEnabled, mCurrentVrService.getComponent(), |
| mCurrentVrService.getUserId()); |
| } |
| } |
| |
| /** |
| * Implementation of VrManagerInternal. Callable only from system services. |
| */ |
| private final class LocalService extends VrManagerInternal { |
| @Override |
| public boolean isInVrMode() { |
| return VrManagerService.this.getVrMode(); |
| } |
| |
| @Override |
| public void setVrMode(boolean enabled, ComponentName packageName, int userId) { |
| VrManagerService.this.setVrMode(enabled, packageName, userId); |
| } |
| |
| @Override |
| public void registerListener(VrStateListener listener) { |
| VrManagerService.this.addListener(listener); |
| } |
| |
| @Override |
| public void unregisterListener(VrStateListener listener) { |
| VrManagerService.this.removeListener(listener); |
| } |
| |
| @Override |
| public int hasVrPackage(ComponentName packageName, int userId) { |
| return VrManagerService.this.hasVrPackage(packageName, userId); |
| } |
| } |
| |
| public VrManagerService(Context context) { |
| super(context); |
| } |
| |
| @Override |
| public void onStart() { |
| synchronized(mLock) { |
| initializeNative(); |
| mContext = getContext(); |
| } |
| |
| publishLocalService(VrManagerInternal.class, new LocalService()); |
| } |
| |
| @Override |
| public void onBootPhase(int phase) { |
| if (phase == SystemService.PHASE_THIRD_PARTY_APPS_CAN_START) { |
| synchronized (mLock) { |
| Looper looper = Looper.getMainLooper(); |
| Handler handler = new Handler(looper); |
| ArrayList<EnabledComponentChangeListener> listeners = new ArrayList<>(); |
| listeners.add(this); |
| mComponentObserver = EnabledComponentsObserver.build(mContext, handler, |
| Settings.Secure.ENABLED_VR_LISTENERS, looper, |
| android.Manifest.permission.BIND_VR_LISTENER_SERVICE, |
| VrListenerService.SERVICE_INTERFACE, mLock, listeners); |
| |
| mComponentObserver.rebuildAll(); |
| } |
| } |
| } |
| |
| @Override |
| public void onStartUser(int userHandle) { |
| synchronized (mLock) { |
| mComponentObserver.onUsersChanged(); |
| } |
| } |
| |
| @Override |
| public void onSwitchUser(int userHandle) { |
| synchronized (mLock) { |
| mComponentObserver.onUsersChanged(); |
| } |
| |
| } |
| |
| @Override |
| public void onStopUser(int userHandle) { |
| synchronized (mLock) { |
| mComponentObserver.onUsersChanged(); |
| } |
| |
| } |
| |
| @Override |
| public void onCleanupUser(int userHandle) { |
| synchronized (mLock) { |
| mComponentObserver.onUsersChanged(); |
| } |
| } |
| |
| private void updateOverlayStateLocked(ComponentName exemptedComponent) { |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| AppOpsManager appOpsManager = getContext().getSystemService(AppOpsManager.class); |
| if (appOpsManager != null) { |
| String[] exemptions = (exemptedComponent == null) ? new String[0] : |
| new String[] { exemptedComponent.getPackageName() }; |
| |
| appOpsManager.setUserRestriction(AppOpsManager.OP_SYSTEM_ALERT_WINDOW, |
| mVrModeEnabled, mOverlayToken, exemptions); |
| } |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| |
| /** |
| * Send VR mode changes (if the mode state has changed), and update the bound/unbound state of |
| * the currently selected VR listener service. If the component selected for the VR listener |
| * service has changed, unbind the previous listener and bind the new listener (if enabled). |
| * <p/> |
| * Note: Must be called while holding {@code mLock}. |
| * |
| * @param enabled new state for VR mode. |
| * @param component new component to be bound as a VR listener. |
| * @param userId user owning the component to be bound. |
| * |
| * @return {@code true} if the component/user combination specified is valid. |
| */ |
| private boolean updateCurrentVrServiceLocked(boolean enabled, |
| @NonNull ComponentName component, int userId) { |
| |
| boolean validUserComponent = (mComponentObserver.isValid(component, userId) == |
| EnabledComponentsObserver.NO_ERROR); |
| |
| // Always send mode change events. |
| changeVrModeLocked(enabled, (enabled && validUserComponent) ? component : null); |
| |
| if (!enabled || !validUserComponent) { |
| // Unbind whatever is running |
| if (mCurrentVrService != null) { |
| Slog.i(TAG, "Disconnecting " + mCurrentVrService.getComponent() + " for user " + |
| mCurrentVrService.getUserId()); |
| mCurrentVrService.disconnect(); |
| mCurrentVrService = null; |
| } |
| return validUserComponent; |
| } |
| |
| if (mCurrentVrService != null) { |
| // Unbind any running service that doesn't match the component/user selection |
| if (mCurrentVrService.disconnectIfNotMatching(component, userId)) { |
| Slog.i(TAG, "Disconnecting " + mCurrentVrService.getComponent() + " for user " + |
| mCurrentVrService.getUserId()); |
| mCurrentVrService = VrManagerService.create(mContext, component, userId); |
| mCurrentVrService.connect(); |
| Slog.i(TAG, "Connecting " + mCurrentVrService.getComponent() + " for user " + |
| mCurrentVrService.getUserId()); |
| } |
| // The service with the correct component/user is bound |
| } else { |
| // Nothing was previously running, bind a new service |
| mCurrentVrService = VrManagerService.create(mContext, component, userId); |
| mCurrentVrService.connect(); |
| Slog.i(TAG, "Connecting " + mCurrentVrService.getComponent() + " for user " + |
| mCurrentVrService.getUserId()); |
| } |
| |
| return validUserComponent; |
| } |
| |
| /** |
| * Send VR mode change callbacks to HAL and system services if mode has actually changed. |
| * <p/> |
| * Note: Must be called while holding {@code mLock}. |
| * |
| * @param enabled new state of the VR mode. |
| * @param exemptedComponent a component to exempt from AppOps restrictions for overlays. |
| */ |
| private void changeVrModeLocked(boolean enabled, ComponentName exemptedComponent) { |
| if (mVrModeEnabled != enabled) { |
| mVrModeEnabled = enabled; |
| |
| // Log mode change event. |
| Slog.i(TAG, "VR mode " + ((mVrModeEnabled) ? "enabled" : "disabled")); |
| setVrModeNative(mVrModeEnabled); |
| |
| updateOverlayStateLocked(exemptedComponent); |
| onVrModeChangedLocked(); |
| } |
| } |
| |
| /** |
| * Notify system services of VR mode change. |
| * <p/> |
| * Note: Must be called while holding {@code mLock}. |
| */ |
| private void onVrModeChangedLocked() { |
| for (VrStateListener l : mListeners) { |
| l.onVrStateChanged(mVrModeEnabled); |
| } |
| } |
| |
| /** |
| * Helper function for making ManagedApplicationService instances. |
| */ |
| private static ManagedApplicationService create(@NonNull Context context, |
| @NonNull ComponentName component, int userId) { |
| return ManagedApplicationService.build(context, component, userId, |
| R.string.vr_listener_binding_label, Settings.ACTION_VR_LISTENER_SETTINGS, |
| sBinderChecker); |
| } |
| |
| /* |
| * Implementation of VrManagerInternal calls. These are callable from system services. |
| */ |
| |
| private boolean setVrMode(boolean enabled, @NonNull ComponentName targetPackageName, |
| int userId) { |
| synchronized (mLock) { |
| return updateCurrentVrServiceLocked(enabled, targetPackageName, userId); |
| } |
| } |
| |
| private boolean getVrMode() { |
| synchronized (mLock) { |
| return mVrModeEnabled; |
| } |
| } |
| |
| private void addListener(VrStateListener listener) { |
| synchronized (mLock) { |
| mListeners.add(listener); |
| } |
| } |
| |
| private void removeListener(VrStateListener listener) { |
| synchronized (mLock) { |
| mListeners.remove(listener); |
| } |
| } |
| |
| private int hasVrPackage(@NonNull ComponentName targetPackageName, int userId) { |
| synchronized (mLock) { |
| return mComponentObserver.isValid(targetPackageName, userId); |
| } |
| } |
| } |